diff options
Diffstat (limited to 'drivers')
128 files changed, 7665 insertions, 1196 deletions
diff --git a/drivers/Kconfig b/drivers/Kconfig index b3138fbb46a4..0a0a90f52d26 100644 --- a/drivers/Kconfig +++ b/drivers/Kconfig @@ -52,6 +52,8 @@ source "drivers/i2c/Kconfig" source "drivers/spi/Kconfig" +source "drivers/spmi/Kconfig" + source "drivers/hsi/Kconfig" source "drivers/pps/Kconfig" @@ -170,4 +172,6 @@ source "drivers/phy/Kconfig" source "drivers/powercap/Kconfig" +source "drivers/mcb/Kconfig" + endmenu diff --git a/drivers/Makefile b/drivers/Makefile index 8e3b8b06c0b2..e3ced91b1784 100644 --- a/drivers/Makefile +++ b/drivers/Makefile @@ -66,6 +66,7 @@ obj-$(CONFIG_ATA) += ata/ obj-$(CONFIG_TARGET_CORE) += target/ obj-$(CONFIG_MTD) += mtd/ obj-$(CONFIG_SPI) += spi/ +obj-$(CONFIG_SPMI) += spmi/ obj-y += hsi/ obj-y += net/ obj-$(CONFIG_ATM) += atm/ @@ -155,3 +156,4 @@ obj-$(CONFIG_IPACK_BUS) += ipack/ obj-$(CONFIG_NTB) += ntb/ obj-$(CONFIG_FMC) += fmc/ obj-$(CONFIG_POWERCAP) += powercap/ +obj-$(CONFIG_MCB) += mcb/ diff --git a/drivers/base/regmap/regmap-spmi.c b/drivers/base/regmap/regmap-spmi.c index ac2391013db1..d7026dc33388 100644 --- a/drivers/base/regmap/regmap-spmi.c +++ b/drivers/base/regmap/regmap-spmi.c @@ -22,69 +22,235 @@ #include <linux/module.h> #include <linux/init.h> -static int regmap_spmi_read(void *context, - const void *reg, size_t reg_size, - void *val, size_t val_size) +static int regmap_spmi_base_read(void *context, + const void *reg, size_t reg_size, + void *val, size_t val_size) { + u8 addr = *(u8 *)reg; + int err = 0; + + BUG_ON(reg_size != 1); + + while (val_size-- && !err) + err = spmi_register_read(context, addr++, val++); + + return err; +} + +static int regmap_spmi_base_gather_write(void *context, + const void *reg, size_t reg_size, + const void *val, size_t val_size) +{ + const u8 *data = val; + u8 addr = *(u8 *)reg; + int err = 0; + + BUG_ON(reg_size != 1); + + /* + * SPMI defines a more bandwidth-efficient 'Register 0 Write' sequence, + * use it when possible. + */ + if (addr == 0 && val_size) { + err = spmi_register_zero_write(context, *data); + if (err) + goto err_out; + + data++; + addr++; + val_size--; + } + + while (val_size) { + err = spmi_register_write(context, addr, *data); + if (err) + goto err_out; + + data++; + addr++; + val_size--; + } + +err_out: + return err; +} + +static int regmap_spmi_base_write(void *context, const void *data, + size_t count) +{ + BUG_ON(count < 1); + return regmap_spmi_base_gather_write(context, data, 1, data + 1, + count - 1); +} + +static struct regmap_bus regmap_spmi_base = { + .read = regmap_spmi_base_read, + .write = regmap_spmi_base_write, + .gather_write = regmap_spmi_base_gather_write, + .reg_format_endian_default = REGMAP_ENDIAN_NATIVE, + .val_format_endian_default = REGMAP_ENDIAN_NATIVE, +}; + +/** + * regmap_init_spmi_base(): Create regmap for the Base register space + * @sdev: SPMI device that will be interacted with + * @config: Configuration for register map + * + * The return value will be an ERR_PTR() on error or a valid pointer to + * a struct regmap. + */ +struct regmap *regmap_init_spmi_base(struct spmi_device *sdev, + const struct regmap_config *config) +{ + return regmap_init(&sdev->dev, ®map_spmi_base, sdev, config); +} +EXPORT_SYMBOL_GPL(regmap_init_spmi_base); + +/** + * devm_regmap_init_spmi_base(): Create managed regmap for Base register space + * @sdev: SPMI device that will be interacted with + * @config: Configuration for register map + * + * The return value will be an ERR_PTR() on error or a valid pointer + * to a struct regmap. The regmap will be automatically freed by the + * device management code. + */ +struct regmap *devm_regmap_init_spmi_base(struct spmi_device *sdev, + const struct regmap_config *config) +{ + return devm_regmap_init(&sdev->dev, ®map_spmi_base, sdev, config); +} +EXPORT_SYMBOL_GPL(devm_regmap_init_spmi_base); + +static int regmap_spmi_ext_read(void *context, + const void *reg, size_t reg_size, + void *val, size_t val_size) +{ + int err = 0; + size_t len; + u16 addr; + BUG_ON(reg_size != 2); - return spmi_ext_register_readl(context, *(u16 *)reg, - val, val_size); + + addr = *(u16 *)reg; + + /* + * Split accesses into two to take advantage of the more + * bandwidth-efficient 'Extended Register Read' command when possible + */ + while (addr <= 0xFF && val_size) { + len = min_t(size_t, val_size, 16); + + err = spmi_ext_register_read(context, addr, val, len); + if (err) + goto err_out; + + addr += len; + val += len; + val_size -= len; + } + + while (val_size) { + len = min_t(size_t, val_size, 8); + + err = spmi_ext_register_readl(context, addr, val, val_size); + if (err) + goto err_out; + + addr += len; + val += len; + val_size -= len; + } + +err_out: + return err; } -static int regmap_spmi_gather_write(void *context, - const void *reg, size_t reg_size, - const void *val, size_t val_size) +static int regmap_spmi_ext_gather_write(void *context, + const void *reg, size_t reg_size, + const void *val, size_t val_size) { + int err = 0; + size_t len; + u16 addr; + BUG_ON(reg_size != 2); - return spmi_ext_register_writel(context, *(u16 *)reg, val, val_size); + + addr = *(u16 *)reg; + + while (addr <= 0xFF && val_size) { + len = min_t(size_t, val_size, 16); + + err = spmi_ext_register_write(context, addr, val, len); + if (err) + goto err_out; + + addr += len; + val += len; + val_size -= len; + } + + while (val_size) { + len = min_t(size_t, val_size, 8); + + err = spmi_ext_register_writel(context, addr, val, len); + if (err) + goto err_out; + + addr += len; + val += len; + val_size -= len; + } + +err_out: + return err; } -static int regmap_spmi_write(void *context, const void *data, - size_t count) +static int regmap_spmi_ext_write(void *context, const void *data, + size_t count) { BUG_ON(count < 2); - return regmap_spmi_gather_write(context, data, 2, data + 2, count - 2); + return regmap_spmi_ext_gather_write(context, data, 2, data + 2, + count - 2); } -static struct regmap_bus regmap_spmi = { - .read = regmap_spmi_read, - .write = regmap_spmi_write, - .gather_write = regmap_spmi_gather_write, +static struct regmap_bus regmap_spmi_ext = { + .read = regmap_spmi_ext_read, + .write = regmap_spmi_ext_write, + .gather_write = regmap_spmi_ext_gather_write, .reg_format_endian_default = REGMAP_ENDIAN_NATIVE, .val_format_endian_default = REGMAP_ENDIAN_NATIVE, }; /** - * regmap_init_spmi(): Initialize register map - * - * @sdev: Device that will be interacted with - * @config: Configuration for register map + * regmap_init_spmi_ext(): Create regmap for Ext register space + * @sdev: Device that will be interacted with + * @config: Configuration for register map * * The return value will be an ERR_PTR() on error or a valid pointer to * a struct regmap. */ -struct regmap *regmap_init_spmi(struct spmi_device *sdev, - const struct regmap_config *config) +struct regmap *regmap_init_spmi_ext(struct spmi_device *sdev, + const struct regmap_config *config) { - return regmap_init(&sdev->dev, ®map_spmi, sdev, config); + return regmap_init(&sdev->dev, ®map_spmi_ext, sdev, config); } -EXPORT_SYMBOL_GPL(regmap_init_spmi); +EXPORT_SYMBOL_GPL(regmap_init_spmi_ext); /** - * devm_regmap_init_spmi(): Initialise managed register map - * - * @sdev: Device that will be interacted with - * @config: Configuration for register map + * devm_regmap_init_spmi_ext(): Create managed regmap for Ext register space + * @sdev: SPMI device that will be interacted with + * @config: Configuration for register map * * The return value will be an ERR_PTR() on error or a valid pointer * to a struct regmap. The regmap will be automatically freed by the * device management code. */ -struct regmap *devm_regmap_init_spmi(struct spmi_device *sdev, +struct regmap *devm_regmap_init_spmi_ext(struct spmi_device *sdev, const struct regmap_config *config) { - return devm_regmap_init(&sdev->dev, ®map_spmi, sdev, config); + return devm_regmap_init(&sdev->dev, ®map_spmi_ext, sdev, config); } -EXPORT_SYMBOL_GPL(devm_regmap_init_spmi); +EXPORT_SYMBOL_GPL(devm_regmap_init_spmi_ext); MODULE_LICENSE("GPL"); diff --git a/drivers/char/agp/frontend.c b/drivers/char/agp/frontend.c index 1b192395a90c..8121b4c70ede 100644 --- a/drivers/char/agp/frontend.c +++ b/drivers/char/agp/frontend.c @@ -31,7 +31,6 @@ #include <linux/module.h> #include <linux/mman.h> #include <linux/pci.h> -#include <linux/init.h> #include <linux/miscdevice.h> #include <linux/agp_backend.h> #include <linux/agpgart.h> diff --git a/drivers/char/agp/generic.c b/drivers/char/agp/generic.c index f39437addb58..0fbccce1cee9 100644 --- a/drivers/char/agp/generic.c +++ b/drivers/char/agp/generic.c @@ -29,7 +29,6 @@ */ #include <linux/module.h> #include <linux/pci.h> -#include <linux/init.h> #include <linux/pagemap.h> #include <linux/miscdevice.h> #include <linux/pm.h> diff --git a/drivers/char/agp/intel-gtt.c b/drivers/char/agp/intel-gtt.c index 5c85350f4c3d..9a024f899dd4 100644 --- a/drivers/char/agp/intel-gtt.c +++ b/drivers/char/agp/intel-gtt.c @@ -17,7 +17,6 @@ #include <linux/module.h> #include <linux/pci.h> -#include <linux/init.h> #include <linux/kernel.h> #include <linux/pagemap.h> #include <linux/agp_backend.h> diff --git a/drivers/char/agp/sgi-agp.c b/drivers/char/agp/sgi-agp.c index 05b8d0241bde..3051c73bc383 100644 --- a/drivers/char/agp/sgi-agp.c +++ b/drivers/char/agp/sgi-agp.c @@ -15,7 +15,6 @@ #include <linux/module.h> #include <linux/pci.h> #include <linux/slab.h> -#include <linux/init.h> #include <linux/agp_backend.h> #include <asm/sn/addrs.h> #include <asm/sn/io.h> diff --git a/drivers/char/hw_random/bcm2835-rng.c b/drivers/char/hw_random/bcm2835-rng.c index 43577ca780e3..8c3b255e629a 100644 --- a/drivers/char/hw_random/bcm2835-rng.c +++ b/drivers/char/hw_random/bcm2835-rng.c @@ -8,7 +8,6 @@ */ #include <linux/hw_random.h> -#include <linux/init.h> #include <linux/io.h> #include <linux/kernel.h> #include <linux/module.h> diff --git a/drivers/char/hw_random/core.c b/drivers/char/hw_random/core.c index a0f7724852eb..b9495a8c05c6 100644 --- a/drivers/char/hw_random/core.c +++ b/drivers/char/hw_random/core.c @@ -37,7 +37,6 @@ #include <linux/kernel.h> #include <linux/fs.h> #include <linux/sched.h> -#include <linux/init.h> #include <linux/miscdevice.h> #include <linux/delay.h> #include <linux/slab.h> diff --git a/drivers/char/hw_random/exynos-rng.c b/drivers/char/hw_random/exynos-rng.c index 402ccfb625c5..9f8277cc44b4 100644 --- a/drivers/char/hw_random/exynos-rng.c +++ b/drivers/char/hw_random/exynos-rng.c @@ -22,7 +22,6 @@ #include <linux/hw_random.h> #include <linux/kernel.h> #include <linux/module.h> -#include <linux/init.h> #include <linux/io.h> #include <linux/platform_device.h> #include <linux/clk.h> diff --git a/drivers/char/hw_random/n2-drv.c b/drivers/char/hw_random/n2-drv.c index f9beed54d0c8..432232eefe05 100644 --- a/drivers/char/hw_random/n2-drv.c +++ b/drivers/char/hw_random/n2-drv.c @@ -7,7 +7,6 @@ #include <linux/module.h> #include <linux/types.h> #include <linux/delay.h> -#include <linux/init.h> #include <linux/slab.h> #include <linux/workqueue.h> #include <linux/preempt.h> diff --git a/drivers/char/hw_random/nomadik-rng.c b/drivers/char/hw_random/nomadik-rng.c index 232b87fb5fc9..00e9d2d46634 100644 --- a/drivers/char/hw_random/nomadik-rng.c +++ b/drivers/char/hw_random/nomadik-rng.c @@ -10,7 +10,6 @@ #include <linux/kernel.h> #include <linux/module.h> -#include <linux/init.h> #include <linux/device.h> #include <linux/amba/bus.h> #include <linux/hw_random.h> diff --git a/drivers/char/hw_random/octeon-rng.c b/drivers/char/hw_random/octeon-rng.c index f2885dbe1849..b5cc3420c659 100644 --- a/drivers/char/hw_random/octeon-rng.c +++ b/drivers/char/hw_random/octeon-rng.c @@ -10,7 +10,6 @@ */ #include <linux/module.h> -#include <linux/init.h> #include <linux/platform_device.h> #include <linux/device.h> #include <linux/hw_random.h> diff --git a/drivers/char/ipmi/ipmi_si_intf.c b/drivers/char/ipmi/ipmi_si_intf.c index 03f41896d090..b7efd3c1a882 100644 --- a/drivers/char/ipmi/ipmi_si_intf.c +++ b/drivers/char/ipmi/ipmi_si_intf.c @@ -61,7 +61,6 @@ #include <linux/ipmi_smi.h> #include <asm/io.h> #include "ipmi_si_sm.h" -#include <linux/init.h> #include <linux/dmi.h> #include <linux/string.h> #include <linux/ctype.h> diff --git a/drivers/char/mem.c b/drivers/char/mem.c index 92c5937f80c3..917403fe10da 100644 --- a/drivers/char/mem.c +++ b/drivers/char/mem.c @@ -99,6 +99,9 @@ static ssize_t read_mem(struct file *file, char __user *buf, ssize_t read, sz; char *ptr; + if (p != *ppos) + return 0; + if (!valid_phys_addr_range(p, count)) return -EFAULT; read = 0; @@ -157,6 +160,9 @@ static ssize_t write_mem(struct file *file, const char __user *buf, unsigned long copied; void *ptr; + if (p != *ppos) + return -EFBIG; + if (!valid_phys_addr_range(p, count)) return -EFAULT; diff --git a/drivers/char/mwave/3780i.c b/drivers/char/mwave/3780i.c index 881c9e595939..28740046bc83 100644 --- a/drivers/char/mwave/3780i.c +++ b/drivers/char/mwave/3780i.c @@ -50,7 +50,6 @@ #include <linux/unistd.h> #include <linux/delay.h> #include <linux/ioport.h> -#include <linux/init.h> #include <linux/bitops.h> #include <linux/sched.h> /* cond_resched() */ diff --git a/drivers/char/tile-srom.c b/drivers/char/tile-srom.c index 0e506bad1986..bd377472dcfb 100644 --- a/drivers/char/tile-srom.c +++ b/drivers/char/tile-srom.c @@ -20,7 +20,6 @@ #include <linux/module.h> #include <linux/moduleparam.h> -#include <linux/init.h> #include <linux/kernel.h> /* printk() */ #include <linux/slab.h> /* kmalloc() */ #include <linux/fs.h> /* everything... */ diff --git a/drivers/char/tpm/tpm_i2c_infineon.c b/drivers/char/tpm/tpm_i2c_infineon.c index 52b9b2b2f300..472af4bb1b61 100644 --- a/drivers/char/tpm/tpm_i2c_infineon.c +++ b/drivers/char/tpm/tpm_i2c_infineon.c @@ -21,7 +21,6 @@ * * */ -#include <linux/init.h> #include <linux/i2c.h> #include <linux/module.h> #include <linux/wait.h> diff --git a/drivers/char/tpm/tpm_i2c_stm_st33.c b/drivers/char/tpm/tpm_i2c_stm_st33.c index 5b0dd8ef74c0..3b7bf2162898 100644 --- a/drivers/char/tpm/tpm_i2c_stm_st33.c +++ b/drivers/char/tpm/tpm_i2c_stm_st33.c @@ -38,7 +38,6 @@ #include <linux/miscdevice.h> #include <linux/kernel.h> #include <linux/delay.h> -#include <linux/init.h> #include <linux/wait.h> #include <linux/string.h> #include <linux/interrupt.h> diff --git a/drivers/connector/cn_proc.c b/drivers/connector/cn_proc.c index 18c5b9b16645..148d707a1d43 100644 --- a/drivers/connector/cn_proc.c +++ b/drivers/connector/cn_proc.c @@ -95,7 +95,7 @@ void proc_fork_connector(struct task_struct *task) msg->len = sizeof(*ev); msg->flags = 0; /* not used */ /* If cn_netlink_send() failed, the data is not sent */ - cn_netlink_send(msg, CN_IDX_PROC, GFP_KERNEL); + cn_netlink_send(msg, 0, CN_IDX_PROC, GFP_KERNEL); } void proc_exec_connector(struct task_struct *task) @@ -122,7 +122,7 @@ void proc_exec_connector(struct task_struct *task) msg->ack = 0; /* not used */ msg->len = sizeof(*ev); msg->flags = 0; /* not used */ - cn_netlink_send(msg, CN_IDX_PROC, GFP_KERNEL); + cn_netlink_send(msg, 0, CN_IDX_PROC, GFP_KERNEL); } void proc_id_connector(struct task_struct *task, int which_id) @@ -163,7 +163,7 @@ void proc_id_connector(struct task_struct *task, int which_id) msg->ack = 0; /* not used */ msg->len = sizeof(*ev); msg->flags = 0; /* not used */ - cn_netlink_send(msg, CN_IDX_PROC, GFP_KERNEL); + cn_netlink_send(msg, 0, CN_IDX_PROC, GFP_KERNEL); } void proc_sid_connector(struct task_struct *task) @@ -190,7 +190,7 @@ void proc_sid_connector(struct task_struct *task) msg->ack = 0; /* not used */ msg->len = sizeof(*ev); msg->flags = 0; /* not used */ - cn_netlink_send(msg, CN_IDX_PROC, GFP_KERNEL); + cn_netlink_send(msg, 0, CN_IDX_PROC, GFP_KERNEL); } void proc_ptrace_connector(struct task_struct *task, int ptrace_id) @@ -225,7 +225,7 @@ void proc_ptrace_connector(struct task_struct *task, int ptrace_id) msg->ack = 0; /* not used */ msg->len = sizeof(*ev); msg->flags = 0; /* not used */ - cn_netlink_send(msg, CN_IDX_PROC, GFP_KERNEL); + cn_netlink_send(msg, 0, CN_IDX_PROC, GFP_KERNEL); } void proc_comm_connector(struct task_struct *task) @@ -253,7 +253,7 @@ void proc_comm_connector(struct task_struct *task) msg->ack = 0; /* not used */ msg->len = sizeof(*ev); msg->flags = 0; /* not used */ - cn_netlink_send(msg, CN_IDX_PROC, GFP_KERNEL); + cn_netlink_send(msg, 0, CN_IDX_PROC, GFP_KERNEL); } void proc_coredump_connector(struct task_struct *task) @@ -280,7 +280,7 @@ void proc_coredump_connector(struct task_struct *task) msg->ack = 0; /* not used */ msg->len = sizeof(*ev); msg->flags = 0; /* not used */ - cn_netlink_send(msg, CN_IDX_PROC, GFP_KERNEL); + cn_netlink_send(msg, 0, CN_IDX_PROC, GFP_KERNEL); } void proc_exit_connector(struct task_struct *task) @@ -309,7 +309,7 @@ void proc_exit_connector(struct task_struct *task) msg->ack = 0; /* not used */ msg->len = sizeof(*ev); msg->flags = 0; /* not used */ - cn_netlink_send(msg, CN_IDX_PROC, GFP_KERNEL); + cn_netlink_send(msg, 0, CN_IDX_PROC, GFP_KERNEL); } /* @@ -343,7 +343,7 @@ static void cn_proc_ack(int err, int rcvd_seq, int rcvd_ack) msg->ack = rcvd_ack + 1; msg->len = sizeof(*ev); msg->flags = 0; /* not used */ - cn_netlink_send(msg, CN_IDX_PROC, GFP_KERNEL); + cn_netlink_send(msg, 0, CN_IDX_PROC, GFP_KERNEL); } /** diff --git a/drivers/connector/connector.c b/drivers/connector/connector.c index a36749f1e44a..77afe7487d34 100644 --- a/drivers/connector/connector.c +++ b/drivers/connector/connector.c @@ -50,7 +50,7 @@ static int cn_already_initialized; * * Sequence number is incremented with each message to be sent. * - * If we expect reply to our message then the sequence number in + * If we expect a reply to our message then the sequence number in * received message MUST be the same as in original message, and * acknowledge number MUST be the same + 1. * @@ -62,8 +62,11 @@ static int cn_already_initialized; * the acknowledgement number in the original message + 1, then it is * a new message. * + * The message is sent to, the portid if given, the group if given, both if + * both, or if both are zero then the group is looked up and sent there. */ -int cn_netlink_send(struct cn_msg *msg, u32 __group, gfp_t gfp_mask) +int cn_netlink_send(struct cn_msg *msg, u32 portid, u32 __group, + gfp_t gfp_mask) { struct cn_callback_entry *__cbq; unsigned int size; @@ -74,7 +77,9 @@ int cn_netlink_send(struct cn_msg *msg, u32 __group, gfp_t gfp_mask) u32 group = 0; int found = 0; - if (!__group) { + if (portid || __group) { + group = __group; + } else { spin_lock_bh(&dev->cbdev->queue_lock); list_for_each_entry(__cbq, &dev->cbdev->queue_list, callback_entry) { @@ -88,11 +93,9 @@ int cn_netlink_send(struct cn_msg *msg, u32 __group, gfp_t gfp_mask) if (!found) return -ENODEV; - } else { - group = __group; } - if (!netlink_has_listeners(dev->nls, group)) + if (!portid && !netlink_has_listeners(dev->nls, group)) return -ESRCH; size = sizeof(*msg) + msg->len; @@ -113,7 +116,10 @@ int cn_netlink_send(struct cn_msg *msg, u32 __group, gfp_t gfp_mask) NETLINK_CB(skb).dst_group = group; - return netlink_broadcast(dev->nls, skb, 0, group, gfp_mask); + if (group) + return netlink_broadcast(dev->nls, skb, portid, group, + gfp_mask); + return netlink_unicast(dev->nls, skb, portid, !(gfp_mask&__GFP_WAIT)); } EXPORT_SYMBOL_GPL(cn_netlink_send); diff --git a/drivers/extcon/Kconfig b/drivers/extcon/Kconfig index bdb5a00f1dfa..be56e8ac95e6 100644 --- a/drivers/extcon/Kconfig +++ b/drivers/extcon/Kconfig @@ -14,10 +14,6 @@ if EXTCON comment "Extcon Device Drivers" -config OF_EXTCON - def_tristate y - depends on OF - config EXTCON_GPIO tristate "GPIO extcon support" depends on GPIOLIB diff --git a/drivers/extcon/Makefile b/drivers/extcon/Makefile index 43eccc0e3448..bf7861ec0906 100644 --- a/drivers/extcon/Makefile +++ b/drivers/extcon/Makefile @@ -2,8 +2,6 @@ # Makefile for external connector class (extcon) devices # -obj-$(CONFIG_OF_EXTCON) += of_extcon.o - obj-$(CONFIG_EXTCON) += extcon-class.o obj-$(CONFIG_EXTCON_GPIO) += extcon-gpio.o obj-$(CONFIG_EXTCON_ADC_JACK) += extcon-adc-jack.o diff --git a/drivers/extcon/extcon-class.c b/drivers/extcon/extcon-class.c index 76322330cbd7..7ab21aa6eaa1 100644 --- a/drivers/extcon/extcon-class.c +++ b/drivers/extcon/extcon-class.c @@ -31,6 +31,7 @@ #include <linux/extcon.h> #include <linux/slab.h> #include <linux/sysfs.h> +#include <linux/of.h> /* * extcon_cable_name suggests the standard cable names for commonly used @@ -818,6 +819,47 @@ void extcon_dev_unregister(struct extcon_dev *edev) } EXPORT_SYMBOL_GPL(extcon_dev_unregister); +#ifdef CONFIG_OF +/* + * extcon_get_edev_by_phandle - Get the extcon device from devicetree + * @dev - instance to the given device + * @index - index into list of extcon_dev + * + * return the instance of extcon device + */ +struct extcon_dev *extcon_get_edev_by_phandle(struct device *dev, int index) +{ + struct device_node *node; + struct extcon_dev *edev; + + if (!dev->of_node) { + dev_err(dev, "device does not have a device node entry\n"); + return ERR_PTR(-EINVAL); + } + + node = of_parse_phandle(dev->of_node, "extcon", index); + if (!node) { + dev_err(dev, "failed to get phandle in %s node\n", + dev->of_node->full_name); + return ERR_PTR(-ENODEV); + } + + edev = extcon_get_extcon_dev(node->name); + if (!edev) { + dev_err(dev, "unable to get extcon device : %s\n", node->name); + return ERR_PTR(-ENODEV); + } + + return edev; +} +#else +struct extcon_dev *extcon_get_edev_by_phandle(struct device *dev, int index) +{ + return ERR_PTR(-ENOSYS); +} +#endif /* CONFIG_OF */ +EXPORT_SYMBOL_GPL(extcon_get_edev_by_phandle); + static int __init extcon_class_init(void) { return create_extcon_class(); diff --git a/drivers/extcon/extcon-gpio.c b/drivers/extcon/extcon-gpio.c index a63a6b21c9ad..13d522255d81 100644 --- a/drivers/extcon/extcon-gpio.c +++ b/drivers/extcon/extcon-gpio.c @@ -176,9 +176,7 @@ static int gpio_extcon_resume(struct device *dev) } #endif -static const struct dev_pm_ops gpio_extcon_pm_ops = { - SET_SYSTEM_SLEEP_PM_OPS(NULL, gpio_extcon_resume) -}; +static SIMPLE_DEV_PM_OPS(gpio_extcon_pm_ops, NULL, gpio_extcon_resume); static struct platform_driver gpio_extcon_driver = { .probe = gpio_extcon_probe, diff --git a/drivers/extcon/extcon-palmas.c b/drivers/extcon/extcon-palmas.c index 2aea4bcdd7f3..ddff2b72f0a8 100644 --- a/drivers/extcon/extcon-palmas.c +++ b/drivers/extcon/extcon-palmas.c @@ -271,10 +271,7 @@ static int palmas_usb_resume(struct device *dev) }; #endif -static const struct dev_pm_ops palmas_pm_ops = { - SET_SYSTEM_SLEEP_PM_OPS(palmas_usb_suspend, - palmas_usb_resume) -}; +static SIMPLE_DEV_PM_OPS(palmas_pm_ops, palmas_usb_suspend, palmas_usb_resume); static struct of_device_id of_palmas_match_tbl[] = { { .compatible = "ti,palmas-usb", }, diff --git a/drivers/extcon/of_extcon.c b/drivers/extcon/of_extcon.c deleted file mode 100644 index 72173ecbb311..000000000000 --- a/drivers/extcon/of_extcon.c +++ /dev/null @@ -1,64 +0,0 @@ -/* - * OF helpers for External connector (extcon) framework - * - * Copyright (C) 2013 Texas Instruments, Inc. - * Kishon Vijay Abraham I <kishon@ti.com> - * - * Copyright (C) 2013 Samsung Electronics - * Chanwoo Choi <cw00.choi@samsung.com> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - */ - -#include <linux/module.h> -#include <linux/slab.h> -#include <linux/err.h> -#include <linux/extcon.h> -#include <linux/of.h> -#include <linux/of_platform.h> -#include <linux/extcon/of_extcon.h> - -/* - * of_extcon_get_extcon_dev - Get the name of extcon device from devicetree - * @dev - instance to the given device - * @index - index into list of extcon_dev - * - * return the instance of extcon device - */ -struct extcon_dev *of_extcon_get_extcon_dev(struct device *dev, int index) -{ - struct device_node *node; - struct extcon_dev *edev; - struct platform_device *extcon_parent_dev; - - if (!dev->of_node) { - dev_dbg(dev, "device does not have a device node entry\n"); - return ERR_PTR(-EINVAL); - } - - node = of_parse_phandle(dev->of_node, "extcon", index); - if (!node) { - dev_dbg(dev, "failed to get phandle in %s node\n", - dev->of_node->full_name); - return ERR_PTR(-ENODEV); - } - - extcon_parent_dev = of_find_device_by_node(node); - if (!extcon_parent_dev) { - dev_dbg(dev, "unable to find device by node\n"); - return ERR_PTR(-EPROBE_DEFER); - } - - edev = extcon_get_extcon_dev(dev_name(&extcon_parent_dev->dev)); - if (!edev) { - dev_dbg(dev, "unable to get extcon device : %s\n", - dev_name(&extcon_parent_dev->dev)); - return ERR_PTR(-ENODEV); - } - - return edev; -} -EXPORT_SYMBOL_GPL(of_extcon_get_extcon_dev); diff --git a/drivers/fmc/fmc-core.c b/drivers/fmc/fmc-core.c index 24d52497524d..353fc546fb08 100644 --- a/drivers/fmc/fmc-core.c +++ b/drivers/fmc/fmc-core.c @@ -99,10 +99,23 @@ static ssize_t fmc_read_eeprom(struct file *file, struct kobject *kobj, return count; } +static ssize_t fmc_write_eeprom(struct file *file, struct kobject *kobj, + struct bin_attribute *bin_attr, + char *buf, loff_t off, size_t count) +{ + struct device *dev; + struct fmc_device *fmc; + + dev = container_of(kobj, struct device, kobj); + fmc = container_of(dev, struct fmc_device, dev); + return fmc->op->write_ee(fmc, off, buf, count); +} + static struct bin_attribute fmc_eeprom_attr = { - .attr = { .name = "eeprom", .mode = S_IRUGO, }, + .attr = { .name = "eeprom", .mode = S_IRUGO | S_IWUSR, }, .size = 8192, /* more or less standard */ .read = fmc_read_eeprom, + .write = fmc_write_eeprom, }; /* @@ -154,7 +167,7 @@ int fmc_device_register_n(struct fmc_device **devs, int n) ret = -EINVAL; break; } - if (fmc->flags == FMC_DEVICE_NO_MEZZANINE) { + if (fmc->flags & FMC_DEVICE_NO_MEZZANINE) { dev_info(fmc->hwdev, "absent mezzanine in slot %d\n", fmc->slot_id); continue; @@ -189,9 +202,6 @@ int fmc_device_register_n(struct fmc_device **devs, int n) for (i = 0; i < n; i++) { fmc = devarray[i]; - if (fmc->flags == FMC_DEVICE_NO_MEZZANINE) - continue; /* dev_info already done above */ - fmc->nr_slots = n; /* each slot must know how many are there */ fmc->devarray = devarray; @@ -263,8 +273,6 @@ void fmc_device_unregister_n(struct fmc_device **devs, int n) kfree(devs[0]->devarray); for (i = 0; i < n; i++) { - if (devs[i]->flags == FMC_DEVICE_NO_MEZZANINE) - continue; sysfs_remove_bin_file(&devs[i]->dev.kobj, &fmc_eeprom_attr); device_del(&devs[i]->dev); fmc_free_id_info(devs[i]); diff --git a/drivers/fmc/fmc-sdb.c b/drivers/fmc/fmc-sdb.c index 79adc39221ea..4603fdb74465 100644 --- a/drivers/fmc/fmc-sdb.c +++ b/drivers/fmc/fmc-sdb.c @@ -150,23 +150,36 @@ int fmc_reprogram(struct fmc_device *fmc, struct fmc_driver *d, char *gw, } EXPORT_SYMBOL(fmc_reprogram); +static char *__strip_trailing_space(char *buf, char *str, int len) +{ + int i = len - 1; + + memcpy(buf, str, len); + while(i >= 0 && buf[i] == ' ') + buf[i--] = '\0'; + return buf; +} + +#define __sdb_string(buf, field) ({ \ + BUILD_BUG_ON(sizeof(buf) < sizeof(field)); \ + __strip_trailing_space(buf, (void *)(field), sizeof(field)); \ + }) + static void __fmc_show_sdb_tree(const struct fmc_device *fmc, const struct sdb_array *arr) { + unsigned long base = arr->baseaddr; int i, j, n = arr->len, level = arr->level; - const struct sdb_array *ap; + char buf[64]; for (i = 0; i < n; i++) { - unsigned long base; union sdb_record *r; struct sdb_product *p; struct sdb_component *c; r = &arr->record[i]; c = &r->dev.sdb_component; p = &c->product; - base = 0; - for (ap = arr; ap; ap = ap->parent) - base += ap->baseaddr; + dev_info(&fmc->dev, "SDB: "); for (j = 0; j < level; j++) @@ -193,8 +206,8 @@ static void __fmc_show_sdb_tree(const struct fmc_device *fmc, p->name, __be64_to_cpu(c->addr_first) + base); if (IS_ERR(arr->subtree[i])) { - printk(KERN_CONT "(bridge error %li)\n", - PTR_ERR(arr->subtree[i])); + dev_info(&fmc->dev, "SDB: (bridge error %li)\n", + PTR_ERR(arr->subtree[i])); break; } __fmc_show_sdb_tree(fmc, arr->subtree[i]); @@ -203,10 +216,20 @@ static void __fmc_show_sdb_tree(const struct fmc_device *fmc, printk(KERN_CONT "integration\n"); break; case sdb_type_repo_url: - printk(KERN_CONT "repo-url\n"); + printk(KERN_CONT "Synthesis repository: %s\n", + __sdb_string(buf, r->repo_url.repo_url)); break; case sdb_type_synthesis: - printk(KERN_CONT "synthesis-info\n"); + printk(KERN_CONT "Bitstream '%s' ", + __sdb_string(buf, r->synthesis.syn_name)); + printk(KERN_CONT "synthesized %08x by %s ", + __be32_to_cpu(r->synthesis.date), + __sdb_string(buf, r->synthesis.user_name)); + printk(KERN_CONT "(%s version %x), ", + __sdb_string(buf, r->synthesis.tool_name), + __be32_to_cpu(r->synthesis.tool_version)); + printk(KERN_CONT "commit %pm\n", + r->synthesis.commit_id); break; case sdb_type_empty: printk(KERN_CONT "empty\n"); diff --git a/drivers/hv/Makefile b/drivers/hv/Makefile index 0a74b5661186..5e4dfa4cfe22 100644 --- a/drivers/hv/Makefile +++ b/drivers/hv/Makefile @@ -5,4 +5,4 @@ obj-$(CONFIG_HYPERV_BALLOON) += hv_balloon.o hv_vmbus-y := vmbus_drv.o \ hv.o connection.o channel.o \ channel_mgmt.o ring_buffer.o -hv_utils-y := hv_util.o hv_kvp.o hv_snapshot.o +hv_utils-y := hv_util.o hv_kvp.o hv_snapshot.o hv_fcopy.o diff --git a/drivers/hv/channel.c b/drivers/hv/channel.c index 69ea36f07b4d..602ca86a6488 100644 --- a/drivers/hv/channel.c +++ b/drivers/hv/channel.c @@ -27,6 +27,7 @@ #include <linux/slab.h> #include <linux/module.h> #include <linux/hyperv.h> +#include <linux/uio.h> #include "hyperv_vmbus.h" @@ -554,14 +555,14 @@ EXPORT_SYMBOL_GPL(vmbus_close); * * Mainly used by Hyper-V drivers. */ -int vmbus_sendpacket(struct vmbus_channel *channel, const void *buffer, +int vmbus_sendpacket(struct vmbus_channel *channel, void *buffer, u32 bufferlen, u64 requestid, enum vmbus_packet_type type, u32 flags) { struct vmpacket_descriptor desc; u32 packetlen = sizeof(struct vmpacket_descriptor) + bufferlen; u32 packetlen_aligned = ALIGN(packetlen, sizeof(u64)); - struct scatterlist bufferlist[3]; + struct kvec bufferlist[3]; u64 aligned_data = 0; int ret; bool signal = false; @@ -575,11 +576,12 @@ int vmbus_sendpacket(struct vmbus_channel *channel, const void *buffer, desc.len8 = (u16)(packetlen_aligned >> 3); desc.trans_id = requestid; - sg_init_table(bufferlist, 3); - sg_set_buf(&bufferlist[0], &desc, sizeof(struct vmpacket_descriptor)); - sg_set_buf(&bufferlist[1], buffer, bufferlen); - sg_set_buf(&bufferlist[2], &aligned_data, - packetlen_aligned - packetlen); + bufferlist[0].iov_base = &desc; + bufferlist[0].iov_len = sizeof(struct vmpacket_descriptor); + bufferlist[1].iov_base = buffer; + bufferlist[1].iov_len = bufferlen; + bufferlist[2].iov_base = &aligned_data; + bufferlist[2].iov_len = (packetlen_aligned - packetlen); ret = hv_ringbuffer_write(&channel->outbound, bufferlist, 3, &signal); @@ -605,7 +607,7 @@ int vmbus_sendpacket_pagebuffer(struct vmbus_channel *channel, u32 descsize; u32 packetlen; u32 packetlen_aligned; - struct scatterlist bufferlist[3]; + struct kvec bufferlist[3]; u64 aligned_data = 0; bool signal = false; @@ -637,11 +639,12 @@ int vmbus_sendpacket_pagebuffer(struct vmbus_channel *channel, desc.range[i].pfn = pagebuffers[i].pfn; } - sg_init_table(bufferlist, 3); - sg_set_buf(&bufferlist[0], &desc, descsize); - sg_set_buf(&bufferlist[1], buffer, bufferlen); - sg_set_buf(&bufferlist[2], &aligned_data, - packetlen_aligned - packetlen); + bufferlist[0].iov_base = &desc; + bufferlist[0].iov_len = descsize; + bufferlist[1].iov_base = buffer; + bufferlist[1].iov_len = bufferlen; + bufferlist[2].iov_base = &aligned_data; + bufferlist[2].iov_len = (packetlen_aligned - packetlen); ret = hv_ringbuffer_write(&channel->outbound, bufferlist, 3, &signal); @@ -665,7 +668,7 @@ int vmbus_sendpacket_multipagebuffer(struct vmbus_channel *channel, u32 descsize; u32 packetlen; u32 packetlen_aligned; - struct scatterlist bufferlist[3]; + struct kvec bufferlist[3]; u64 aligned_data = 0; bool signal = false; u32 pfncount = NUM_PAGES_SPANNED(multi_pagebuffer->offset, @@ -700,11 +703,12 @@ int vmbus_sendpacket_multipagebuffer(struct vmbus_channel *channel, memcpy(desc.range.pfn_array, multi_pagebuffer->pfn_array, pfncount * sizeof(u64)); - sg_init_table(bufferlist, 3); - sg_set_buf(&bufferlist[0], &desc, descsize); - sg_set_buf(&bufferlist[1], buffer, bufferlen); - sg_set_buf(&bufferlist[2], &aligned_data, - packetlen_aligned - packetlen); + bufferlist[0].iov_base = &desc; + bufferlist[0].iov_len = descsize; + bufferlist[1].iov_base = buffer; + bufferlist[1].iov_len = bufferlen; + bufferlist[2].iov_base = &aligned_data; + bufferlist[2].iov_len = (packetlen_aligned - packetlen); ret = hv_ringbuffer_write(&channel->outbound, bufferlist, 3, &signal); diff --git a/drivers/hv/hv_balloon.c b/drivers/hv/hv_balloon.c index 7e17a5495e02..7e6d78dc9437 100644 --- a/drivers/hv/hv_balloon.c +++ b/drivers/hv/hv_balloon.c @@ -1171,7 +1171,8 @@ static int dm_thread_func(void *dm_dev) int t; while (!kthread_should_stop()) { - t = wait_for_completion_timeout(&dm_device.config_event, 1*HZ); + t = wait_for_completion_interruptible_timeout( + &dm_device.config_event, 1*HZ); /* * The host expects us to post information on the memory * pressure every second. diff --git a/drivers/hv/hv_fcopy.c b/drivers/hv/hv_fcopy.c new file mode 100644 index 000000000000..eaaa3d843b80 --- /dev/null +++ b/drivers/hv/hv_fcopy.c @@ -0,0 +1,414 @@ +/* + * An implementation of file copy service. + * + * Copyright (C) 2014, Microsoft, Inc. + * + * Author : K. Y. Srinivasan <ksrinivasan@novell.com> + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 as published + * by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or + * NON INFRINGEMENT. See the GNU General Public License for more + * details. + * + */ + +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt + +#include <linux/semaphore.h> +#include <linux/fs.h> +#include <linux/nls.h> +#include <linux/workqueue.h> +#include <linux/cdev.h> +#include <linux/hyperv.h> +#include <linux/sched.h> +#include <linux/uaccess.h> +#include <linux/miscdevice.h> + +#include "hyperv_vmbus.h" + +#define WIN8_SRV_MAJOR 1 +#define WIN8_SRV_MINOR 1 +#define WIN8_SRV_VERSION (WIN8_SRV_MAJOR << 16 | WIN8_SRV_MINOR) + +/* + * Global state maintained for transaction that is being processed. + * For a class of integration services, including the "file copy service", + * the specified protocol is a "request/response" protocol which means that + * there can only be single outstanding transaction from the host at any + * given point in time. We use this to simplify memory management in this + * driver - we cache and process only one message at a time. + * + * While the request/response protocol is guaranteed by the host, we further + * ensure this by serializing packet processing in this driver - we do not + * read additional packets from the VMBUs until the current packet is fully + * handled. + * + * The transaction "active" state is set when we receive a request from the + * host and we cleanup this state when the transaction is completed - when we + * respond to the host with our response. When the transaction active state is + * set, we defer handling incoming packets. + */ + +static struct { + bool active; /* transaction status - active or not */ + int recv_len; /* number of bytes received. */ + struct hv_fcopy_hdr *fcopy_msg; /* current message */ + struct hv_start_fcopy message; /* sent to daemon */ + struct vmbus_channel *recv_channel; /* chn we got the request */ + u64 recv_req_id; /* request ID. */ + void *fcopy_context; /* for the channel callback */ + struct semaphore read_sema; +} fcopy_transaction; + +static bool opened; /* currently device opened */ + +/* + * Before we can accept copy messages from the host, we need + * to handshake with the user level daemon. This state tracks + * if we are in the handshake phase. + */ +static bool in_hand_shake = true; +static void fcopy_send_data(void); +static void fcopy_respond_to_host(int error); +static void fcopy_work_func(struct work_struct *dummy); +static DECLARE_DELAYED_WORK(fcopy_work, fcopy_work_func); +static u8 *recv_buffer; + +static void fcopy_work_func(struct work_struct *dummy) +{ + /* + * If the timer fires, the user-mode component has not responded; + * process the pending transaction. + */ + fcopy_respond_to_host(HV_E_FAIL); +} + +static int fcopy_handle_handshake(u32 version) +{ + switch (version) { + case FCOPY_CURRENT_VERSION: + break; + default: + /* + * For now we will fail the registration. + * If and when we have multiple versions to + * deal with, we will be backward compatible. + * We will add this code when needed. + */ + return -EINVAL; + } + pr_info("FCP: user-mode registering done. Daemon version: %d\n", + version); + fcopy_transaction.active = false; + if (fcopy_transaction.fcopy_context) + hv_fcopy_onchannelcallback(fcopy_transaction.fcopy_context); + in_hand_shake = false; + return 0; +} + +static void fcopy_send_data(void) +{ + struct hv_start_fcopy *smsg_out = &fcopy_transaction.message; + int operation = fcopy_transaction.fcopy_msg->operation; + struct hv_start_fcopy *smsg_in; + + /* + * The strings sent from the host are encoded in + * in utf16; convert it to utf8 strings. + * The host assures us that the utf16 strings will not exceed + * the max lengths specified. We will however, reserve room + * for the string terminating character - in the utf16s_utf8s() + * function we limit the size of the buffer where the converted + * string is placed to W_MAX_PATH -1 to guarantee + * that the strings can be properly terminated! + */ + + switch (operation) { + case START_FILE_COPY: + memset(smsg_out, 0, sizeof(struct hv_start_fcopy)); + smsg_out->hdr.operation = operation; + smsg_in = (struct hv_start_fcopy *)fcopy_transaction.fcopy_msg; + + utf16s_to_utf8s((wchar_t *)smsg_in->file_name, W_MAX_PATH, + UTF16_LITTLE_ENDIAN, + (__u8 *)smsg_out->file_name, W_MAX_PATH - 1); + + utf16s_to_utf8s((wchar_t *)smsg_in->path_name, W_MAX_PATH, + UTF16_LITTLE_ENDIAN, + (__u8 *)smsg_out->path_name, W_MAX_PATH - 1); + + smsg_out->copy_flags = smsg_in->copy_flags; + smsg_out->file_size = smsg_in->file_size; + break; + + default: + break; + } + up(&fcopy_transaction.read_sema); + return; +} + +/* + * Send a response back to the host. + */ + +static void +fcopy_respond_to_host(int error) +{ + struct icmsg_hdr *icmsghdr; + u32 buf_len; + struct vmbus_channel *channel; + u64 req_id; + + /* + * Copy the global state for completing the transaction. Note that + * only one transaction can be active at a time. This is guaranteed + * by the file copy protocol implemented by the host. Furthermore, + * the "transaction active" state we maintain ensures that there can + * only be one active transaction at a time. + */ + + buf_len = fcopy_transaction.recv_len; + channel = fcopy_transaction.recv_channel; + req_id = fcopy_transaction.recv_req_id; + + fcopy_transaction.active = false; + + icmsghdr = (struct icmsg_hdr *) + &recv_buffer[sizeof(struct vmbuspipe_hdr)]; + + if (channel->onchannel_callback == NULL) + /* + * We have raced with util driver being unloaded; + * silently return. + */ + return; + + icmsghdr->status = error; + icmsghdr->icflags = ICMSGHDRFLAG_TRANSACTION | ICMSGHDRFLAG_RESPONSE; + vmbus_sendpacket(channel, recv_buffer, buf_len, req_id, + VM_PKT_DATA_INBAND, 0); +} + +void hv_fcopy_onchannelcallback(void *context) +{ + struct vmbus_channel *channel = context; + u32 recvlen; + u64 requestid; + struct hv_fcopy_hdr *fcopy_msg; + struct icmsg_hdr *icmsghdr; + struct icmsg_negotiate *negop = NULL; + int util_fw_version; + int fcopy_srv_version; + + if (fcopy_transaction.active) { + /* + * We will defer processing this callback once + * the current transaction is complete. + */ + fcopy_transaction.fcopy_context = context; + return; + } + + vmbus_recvpacket(channel, recv_buffer, PAGE_SIZE * 2, &recvlen, + &requestid); + if (recvlen <= 0) + return; + + icmsghdr = (struct icmsg_hdr *)&recv_buffer[ + sizeof(struct vmbuspipe_hdr)]; + if (icmsghdr->icmsgtype == ICMSGTYPE_NEGOTIATE) { + util_fw_version = UTIL_FW_VERSION; + fcopy_srv_version = WIN8_SRV_VERSION; + vmbus_prep_negotiate_resp(icmsghdr, negop, recv_buffer, + util_fw_version, fcopy_srv_version); + } else { + fcopy_msg = (struct hv_fcopy_hdr *)&recv_buffer[ + sizeof(struct vmbuspipe_hdr) + + sizeof(struct icmsg_hdr)]; + + /* + * Stash away this global state for completing the + * transaction; note transactions are serialized. + */ + + fcopy_transaction.active = true; + fcopy_transaction.recv_len = recvlen; + fcopy_transaction.recv_channel = channel; + fcopy_transaction.recv_req_id = requestid; + fcopy_transaction.fcopy_msg = fcopy_msg; + + /* + * Send the information to the user-level daemon. + */ + fcopy_send_data(); + schedule_delayed_work(&fcopy_work, 5*HZ); + return; + } + icmsghdr->icflags = ICMSGHDRFLAG_TRANSACTION | ICMSGHDRFLAG_RESPONSE; + vmbus_sendpacket(channel, recv_buffer, recvlen, requestid, + VM_PKT_DATA_INBAND, 0); +} + +/* + * Create a char device that can support read/write for passing + * the payload. + */ + +static ssize_t fcopy_read(struct file *file, char __user *buf, + size_t count, loff_t *ppos) +{ + void *src; + size_t copy_size; + int operation; + + /* + * Wait until there is something to be read. + */ + if (down_interruptible(&fcopy_transaction.read_sema)) + return -EINTR; + + /* + * The channel may be rescinded and in this case, we will wakeup the + * the thread blocked on the semaphore and we will use the opened + * state to correctly handle this case. + */ + if (!opened) + return -ENODEV; + + operation = fcopy_transaction.fcopy_msg->operation; + + if (operation == START_FILE_COPY) { + src = &fcopy_transaction.message; + copy_size = sizeof(struct hv_start_fcopy); + if (count < copy_size) + return 0; + } else { + src = fcopy_transaction.fcopy_msg; + copy_size = sizeof(struct hv_do_fcopy); + if (count < copy_size) + return 0; + } + if (copy_to_user(buf, src, copy_size)) + return -EFAULT; + + return copy_size; +} + +static ssize_t fcopy_write(struct file *file, const char __user *buf, + size_t count, loff_t *ppos) +{ + int response = 0; + + if (count != sizeof(int)) + return -EINVAL; + + if (copy_from_user(&response, buf, sizeof(int))) + return -EFAULT; + + if (in_hand_shake) { + if (fcopy_handle_handshake(response)) + return -EINVAL; + return sizeof(int); + } + + /* + * Complete the transaction by forwarding the result + * to the host. But first, cancel the timeout. + */ + if (cancel_delayed_work_sync(&fcopy_work)) + fcopy_respond_to_host(response); + + return sizeof(int); +} + +static int fcopy_open(struct inode *inode, struct file *f) +{ + /* + * The user level daemon that will open this device is + * really an extension of this driver. We can have only + * active open at a time. + */ + if (opened) + return -EBUSY; + + /* + * The daemon is alive; setup the state. + */ + opened = true; + return 0; +} + +static int fcopy_release(struct inode *inode, struct file *f) +{ + /* + * The daemon has exited; reset the state. + */ + in_hand_shake = true; + opened = false; + return 0; +} + + +static const struct file_operations fcopy_fops = { + .read = fcopy_read, + .write = fcopy_write, + .release = fcopy_release, + .open = fcopy_open, +}; + +static struct miscdevice fcopy_misc = { + .minor = MISC_DYNAMIC_MINOR, + .name = "vmbus/hv_fcopy", + .fops = &fcopy_fops, +}; + +static int fcopy_dev_init(void) +{ + return misc_register(&fcopy_misc); +} + +static void fcopy_dev_deinit(void) +{ + + /* + * The device is going away - perhaps because the + * host has rescinded the channel. Setup state so that + * user level daemon can gracefully exit if it is blocked + * on the read semaphore. + */ + opened = false; + /* + * Signal the semaphore as the device is + * going away. + */ + up(&fcopy_transaction.read_sema); + misc_deregister(&fcopy_misc); +} + +int hv_fcopy_init(struct hv_util_service *srv) +{ + recv_buffer = srv->recv_buffer; + + /* + * When this driver loads, the user level daemon that + * processes the host requests may not yet be running. + * Defer processing channel callbacks until the daemon + * has registered. + */ + fcopy_transaction.active = true; + sema_init(&fcopy_transaction.read_sema, 0); + + return fcopy_dev_init(); +} + +void hv_fcopy_deinit(void) +{ + cancel_delayed_work_sync(&fcopy_work); + fcopy_dev_deinit(); +} diff --git a/drivers/hv/hv_kvp.c b/drivers/hv/hv_kvp.c index 09988b289622..ea852537307e 100644 --- a/drivers/hv/hv_kvp.c +++ b/drivers/hv/hv_kvp.c @@ -113,7 +113,7 @@ kvp_register(int reg_value) kvp_msg->kvp_hdr.operation = reg_value; strcpy(version, HV_DRV_VERSION); msg->len = sizeof(struct hv_kvp_msg); - cn_netlink_send(msg, 0, GFP_ATOMIC); + cn_netlink_send(msg, 0, 0, GFP_ATOMIC); kfree(msg); } } @@ -435,7 +435,7 @@ kvp_send_key(struct work_struct *dummy) } msg->len = sizeof(struct hv_kvp_msg); - cn_netlink_send(msg, 0, GFP_ATOMIC); + cn_netlink_send(msg, 0, 0, GFP_ATOMIC); kfree(msg); return; diff --git a/drivers/hv/hv_snapshot.c b/drivers/hv/hv_snapshot.c index 0c3546224376..34f14fddb666 100644 --- a/drivers/hv/hv_snapshot.c +++ b/drivers/hv/hv_snapshot.c @@ -98,7 +98,7 @@ static void vss_send_op(struct work_struct *dummy) vss_msg->vss_hdr.operation = op; msg->len = sizeof(struct hv_vss_msg); - cn_netlink_send(msg, 0, GFP_ATOMIC); + cn_netlink_send(msg, 0, 0, GFP_ATOMIC); kfree(msg); return; diff --git a/drivers/hv/hv_util.c b/drivers/hv/hv_util.c index 62dfd246b948..dd761806f0e8 100644 --- a/drivers/hv/hv_util.c +++ b/drivers/hv/hv_util.c @@ -28,6 +28,7 @@ #include <linux/reboot.h> #include <linux/hyperv.h> +#include "hyperv_vmbus.h" #define SD_MAJOR 3 #define SD_MINOR 0 @@ -82,6 +83,12 @@ static struct hv_util_service util_vss = { .util_deinit = hv_vss_deinit, }; +static struct hv_util_service util_fcopy = { + .util_cb = hv_fcopy_onchannelcallback, + .util_init = hv_fcopy_init, + .util_deinit = hv_fcopy_deinit, +}; + static void perform_shutdown(struct work_struct *dummy) { orderly_poweroff(true); @@ -401,6 +408,10 @@ static const struct hv_vmbus_device_id id_table[] = { { HV_VSS_GUID, .driver_data = (unsigned long)&util_vss }, + /* File copy GUID */ + { HV_FCOPY_GUID, + .driver_data = (unsigned long)&util_fcopy + }, { }, }; diff --git a/drivers/hv/hyperv_vmbus.h b/drivers/hv/hyperv_vmbus.h index e05517616a06..860134da8039 100644 --- a/drivers/hv/hyperv_vmbus.h +++ b/drivers/hv/hyperv_vmbus.h @@ -559,8 +559,8 @@ int hv_ringbuffer_init(struct hv_ring_buffer_info *ring_info, void *buffer, void hv_ringbuffer_cleanup(struct hv_ring_buffer_info *ring_info); int hv_ringbuffer_write(struct hv_ring_buffer_info *ring_info, - struct scatterlist *sglist, - u32 sgcount, bool *signal); + struct kvec *kv_list, + u32 kv_count, bool *signal); int hv_ringbuffer_peek(struct hv_ring_buffer_info *ring_info, void *buffer, u32 buflen); @@ -669,5 +669,9 @@ int vmbus_set_event(struct vmbus_channel *channel); void vmbus_on_event(unsigned long data); +int hv_fcopy_init(struct hv_util_service *); +void hv_fcopy_deinit(void); +void hv_fcopy_onchannelcallback(void *); + #endif /* _HYPERV_VMBUS_H */ diff --git a/drivers/hv/ring_buffer.c b/drivers/hv/ring_buffer.c index 26c93cf9f6be..15db66b74141 100644 --- a/drivers/hv/ring_buffer.c +++ b/drivers/hv/ring_buffer.c @@ -26,6 +26,7 @@ #include <linux/kernel.h> #include <linux/mm.h> #include <linux/hyperv.h> +#include <linux/uio.h> #include "hyperv_vmbus.h" @@ -387,23 +388,20 @@ void hv_ringbuffer_cleanup(struct hv_ring_buffer_info *ring_info) * */ int hv_ringbuffer_write(struct hv_ring_buffer_info *outring_info, - struct scatterlist *sglist, u32 sgcount, bool *signal) + struct kvec *kv_list, u32 kv_count, bool *signal) { int i = 0; u32 bytes_avail_towrite; u32 bytes_avail_toread; u32 totalbytes_towrite = 0; - struct scatterlist *sg; u32 next_write_location; u32 old_write; u64 prev_indices = 0; unsigned long flags; - for_each_sg(sglist, sg, sgcount, i) - { - totalbytes_towrite += sg->length; - } + for (i = 0; i < kv_count; i++) + totalbytes_towrite += kv_list[i].iov_len; totalbytes_towrite += sizeof(u64); @@ -427,12 +425,11 @@ int hv_ringbuffer_write(struct hv_ring_buffer_info *outring_info, old_write = next_write_location; - for_each_sg(sglist, sg, sgcount, i) - { + for (i = 0; i < kv_count; i++) { next_write_location = hv_copyto_ringbuffer(outring_info, next_write_location, - sg_virt(sg), - sg->length); + kv_list[i].iov_base, + kv_list[i].iov_len); } /* Set previous packet start */ diff --git a/drivers/hv/vmbus_drv.c b/drivers/hv/vmbus_drv.c index 3f0a95290e14..8e53a3c2607e 100644 --- a/drivers/hv/vmbus_drv.c +++ b/drivers/hv/vmbus_drv.c @@ -43,6 +43,12 @@ static struct tasklet_struct msg_dpc; static struct completion probe_event; static int irq; +struct resource hyperv_mmio = { + .name = "hyperv mmio", + .flags = IORESOURCE_MEM, +}; +EXPORT_SYMBOL_GPL(hyperv_mmio); + static int vmbus_exists(void) { if (hv_acpi_dev == NULL) @@ -843,18 +849,21 @@ void vmbus_device_unregister(struct hv_device *device_obj) /* - * VMBUS is an acpi enumerated device. Get the the IRQ information - * from DSDT. + * VMBUS is an acpi enumerated device. Get the the information we + * need from DSDT. */ -static acpi_status vmbus_walk_resources(struct acpi_resource *res, void *irq) +static acpi_status vmbus_walk_resources(struct acpi_resource *res, void *ctx) { + switch (res->type) { + case ACPI_RESOURCE_TYPE_IRQ: + irq = res->data.irq.interrupts[0]; + break; - if (res->type == ACPI_RESOURCE_TYPE_IRQ) { - struct acpi_resource_irq *irqp; - irqp = &res->data.irq; - - *((unsigned int *)irq) = irqp->interrupts[0]; + case ACPI_RESOURCE_TYPE_ADDRESS64: + hyperv_mmio.start = res->data.address64.minimum; + hyperv_mmio.end = res->data.address64.maximum; + break; } return AE_OK; @@ -863,18 +872,34 @@ static acpi_status vmbus_walk_resources(struct acpi_resource *res, void *irq) static int vmbus_acpi_add(struct acpi_device *device) { acpi_status result; + int ret_val = -ENODEV; hv_acpi_dev = device; result = acpi_walk_resources(device->handle, METHOD_NAME__CRS, - vmbus_walk_resources, &irq); + vmbus_walk_resources, NULL); - if (ACPI_FAILURE(result)) { - complete(&probe_event); - return -ENODEV; + if (ACPI_FAILURE(result)) + goto acpi_walk_err; + /* + * The parent of the vmbus acpi device (Gen2 firmware) is the VMOD that + * has the mmio ranges. Get that. + */ + if (device->parent) { + result = acpi_walk_resources(device->parent->handle, + METHOD_NAME__CRS, + vmbus_walk_resources, NULL); + + if (ACPI_FAILURE(result)) + goto acpi_walk_err; + if (hyperv_mmio.start && hyperv_mmio.end) + request_resource(&iomem_resource, &hyperv_mmio); } + ret_val = 0; + +acpi_walk_err: complete(&probe_event); - return 0; + return ret_val; } static const struct acpi_device_id vmbus_acpi_device_ids[] = { diff --git a/drivers/iio/adc/Kconfig b/drivers/iio/adc/Kconfig index 2209f28441e9..5c63f0918d12 100644 --- a/drivers/iio/adc/Kconfig +++ b/drivers/iio/adc/Kconfig @@ -155,6 +155,16 @@ config MCP3422 This driver can also be built as a module. If so, the module will be called mcp3422. +config MEN_Z188_ADC + tristate "MEN 16z188 ADC IP Core support" + depends on MCB + help + Say yes here to enable support for the MEN 16z188 ADC IP-Core on a MCB + carrier. + + This driver can also be built as a module. If so, the module will be + called men_z188_adc. + config NAU7802 tristate "Nuvoton NAU7802 ADC driver" depends on I2C diff --git a/drivers/iio/adc/Makefile b/drivers/iio/adc/Makefile index ba9a10a24cd0..85a4a045f1f0 100644 --- a/drivers/iio/adc/Makefile +++ b/drivers/iio/adc/Makefile @@ -17,6 +17,7 @@ obj-$(CONFIG_LP8788_ADC) += lp8788_adc.o obj-$(CONFIG_MAX1363) += max1363.o obj-$(CONFIG_MCP320X) += mcp320x.o obj-$(CONFIG_MCP3422) += mcp3422.o +obj-$(CONFIG_MEN_Z188_ADC) += men_z188_adc.o obj-$(CONFIG_NAU7802) += nau7802.o obj-$(CONFIG_TI_ADC081C) += ti-adc081c.o obj-$(CONFIG_TI_AM335X_ADC) += ti_am335x_adc.o diff --git a/drivers/iio/adc/men_z188_adc.c b/drivers/iio/adc/men_z188_adc.c new file mode 100644 index 000000000000..6989c16aec2b --- /dev/null +++ b/drivers/iio/adc/men_z188_adc.c @@ -0,0 +1,172 @@ +/* + * MEN 16z188 Analog to Digial Converter + * + * Copyright (C) 2014 MEN Mikroelektronik GmbH (www.men.de) + * Author: Johannes Thumshirn <johannes.thumshirn@men.de> + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the Free + * Software Foundation; version 2 of the License. + */ + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/mcb.h> +#include <linux/io.h> +#include <linux/iio/iio.h> + +#define Z188_ADC_MAX_CHAN 8 +#define Z188_ADC_GAIN 0x0700000 +#define Z188_MODE_VOLTAGE BIT(27) +#define Z188_CFG_AUTO 0x1 +#define Z188_CTRL_REG 0x40 + +#define ADC_DATA(x) (((x) >> 2) & 0x7ffffc) +#define ADC_OVR(x) ((x) & 0x1) + +struct z188_adc { + struct resource *mem; + void __iomem *base; +}; + +#define Z188_ADC_CHANNEL(idx) { \ + .type = IIO_VOLTAGE, \ + .indexed = 1, \ + .channel = (idx), \ + .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \ +} + +static const struct iio_chan_spec z188_adc_iio_channels[] = { + Z188_ADC_CHANNEL(0), + Z188_ADC_CHANNEL(1), + Z188_ADC_CHANNEL(2), + Z188_ADC_CHANNEL(3), + Z188_ADC_CHANNEL(4), + Z188_ADC_CHANNEL(5), + Z188_ADC_CHANNEL(6), + Z188_ADC_CHANNEL(7), +}; + +static int z188_iio_read_raw(struct iio_dev *iio_dev, + struct iio_chan_spec const *chan, + int *val, + int *val2, + long info) +{ + struct z188_adc *adc = iio_priv(iio_dev); + int ret; + u16 tmp; + + switch (info) { + case IIO_CHAN_INFO_RAW: + tmp = readw(adc->base + chan->channel * 4); + + if (ADC_OVR(tmp)) { + dev_info(&iio_dev->dev, + "Oversampling error on ADC channel %d\n", + chan->channel); + return -EIO; + } + *val = ADC_DATA(tmp); + ret = IIO_VAL_INT; + break; + default: + ret = -EINVAL; + break; + } + + return ret; +} + +static struct iio_info z188_adc_info = { + .read_raw = &z188_iio_read_raw, + .driver_module = THIS_MODULE, +}; + +static void men_z188_config_channels(void __iomem *addr) +{ + int i; + u32 cfg; + u32 ctl; + + ctl = readl(addr + Z188_CTRL_REG); + ctl |= Z188_CFG_AUTO; + writel(ctl, addr + Z188_CTRL_REG); + + for (i = 0; i < Z188_ADC_MAX_CHAN; i++) { + cfg = readl(addr + i); + cfg &= ~Z188_ADC_GAIN; + cfg |= Z188_MODE_VOLTAGE; + writel(cfg, addr + i); + } +} + +static int men_z188_probe(struct mcb_device *dev, + const struct mcb_device_id *id) +{ + struct z188_adc *adc; + struct iio_dev *indio_dev; + struct resource *mem; + + indio_dev = devm_iio_device_alloc(&dev->dev, sizeof(struct z188_adc)); + if (!indio_dev) + return -ENOMEM; + + adc = iio_priv(indio_dev); + indio_dev->name = "z188-adc"; + indio_dev->dev.parent = &dev->dev; + indio_dev->info = &z188_adc_info; + indio_dev->modes = INDIO_DIRECT_MODE; + indio_dev->channels = z188_adc_iio_channels; + indio_dev->num_channels = ARRAY_SIZE(z188_adc_iio_channels); + + mem = mcb_request_mem(dev, "z188-adc"); + if (!mem) + return -ENOMEM; + + adc->base = ioremap(mem->start, resource_size(mem)); + if (adc->base == NULL) + goto err; + + men_z188_config_channels(adc->base); + + adc->mem = mem; + mcb_set_drvdata(dev, indio_dev); + + return iio_device_register(indio_dev); + +err: + mcb_release_mem(mem); + return -ENXIO; +} + +static void men_z188_remove(struct mcb_device *dev) +{ + struct iio_dev *indio_dev = mcb_get_drvdata(dev); + struct z188_adc *adc = iio_priv(indio_dev); + + iio_device_unregister(indio_dev); + iounmap(adc->base); + mcb_release_mem(adc->mem); +} + +static const struct mcb_device_id men_z188_ids[] = { + { .device = 0xbc }, +}; +MODULE_DEVICE_TABLE(mcb, men_z188_ids); + +static struct mcb_driver men_z188_driver = { + .driver = { + .name = "z188-adc", + .owner = THIS_MODULE, + }, + .probe = men_z188_probe, + .remove = men_z188_remove, + .id_table = men_z188_ids, +}; +module_mcb_driver(men_z188_driver); + +MODULE_AUTHOR("Johannes Thumshirn <johannes.thumshirn@men.de>"); +MODULE_LICENSE("GPL"); +MODULE_DESCRIPTION("IIO ADC driver for MEN 16z188 ADC Core"); +MODULE_ALIAS("mcb:16z188"); diff --git a/drivers/mcb/Kconfig b/drivers/mcb/Kconfig new file mode 100644 index 000000000000..e9a6976e1010 --- /dev/null +++ b/drivers/mcb/Kconfig @@ -0,0 +1,31 @@ +# +# MEN Chameleon Bus (MCB) support +# + +menuconfig MCB + tristate "MCB support" + default n + depends on HAS_IOMEM + help + + The MCB (MEN Chameleon Bus) is a Bus specific to MEN Mikroelektronik + FPGA based devices. It is used to identify MCB based IP-Cores within + an FPGA and provide the necessary framework for instantiating drivers + for these devices. + + If build as a module, the module is called mcb.ko + +if MCB +config MCB_PCI + tristate "PCI based MCB carrier" + default n + depends on PCI + help + + This is a MCB carrier on a PCI device. Both PCI attached on-board + FPGAs as well as CompactPCI attached MCB FPGAs are supported with + this driver. + + If build as a module, the module is called mcb-pci.ko + +endif # MCB diff --git a/drivers/mcb/Makefile b/drivers/mcb/Makefile new file mode 100644 index 000000000000..1ae141311def --- /dev/null +++ b/drivers/mcb/Makefile @@ -0,0 +1,7 @@ + +obj-$(CONFIG_MCB) += mcb.o + +mcb-y += mcb-core.o +mcb-y += mcb-parse.o + +obj-$(CONFIG_MCB_PCI) += mcb-pci.o diff --git a/drivers/mcb/mcb-core.c b/drivers/mcb/mcb-core.c new file mode 100644 index 000000000000..bbe12932d404 --- /dev/null +++ b/drivers/mcb/mcb-core.c @@ -0,0 +1,414 @@ +/* + * MEN Chameleon Bus. + * + * Copyright (C) 2013 MEN Mikroelektronik GmbH (www.men.de) + * Author: Johannes Thumshirn <johannes.thumshirn@men.de> + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the Free + * Software Foundation; version 2 of the License. + */ +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/slab.h> +#include <linux/types.h> +#include <linux/idr.h> +#include <linux/mcb.h> + +static DEFINE_IDA(mcb_ida); + +static const struct mcb_device_id *mcb_match_id(const struct mcb_device_id *ids, + struct mcb_device *dev) +{ + if (ids) { + while (ids->device) { + if (ids->device == dev->id) + return ids; + ids++; + } + } + + return NULL; +} + +static int mcb_match(struct device *dev, struct device_driver *drv) +{ + struct mcb_driver *mdrv = to_mcb_driver(drv); + struct mcb_device *mdev = to_mcb_device(dev); + const struct mcb_device_id *found_id; + + found_id = mcb_match_id(mdrv->id_table, mdev); + if (found_id) + return 1; + + return 0; +} + +static int mcb_uevent(struct device *dev, struct kobj_uevent_env *env) +{ + struct mcb_device *mdev = to_mcb_device(dev); + int ret; + + ret = add_uevent_var(env, "MODALIAS=mcb:16z%03d", mdev->id); + if (ret) + return -ENOMEM; + + return 0; +} + +static int mcb_probe(struct device *dev) +{ + struct mcb_driver *mdrv = to_mcb_driver(dev->driver); + struct mcb_device *mdev = to_mcb_device(dev); + const struct mcb_device_id *found_id; + + found_id = mcb_match_id(mdrv->id_table, mdev); + if (!found_id) + return -ENODEV; + + return mdrv->probe(mdev, found_id); +} + +static int mcb_remove(struct device *dev) +{ + struct mcb_driver *mdrv = to_mcb_driver(dev->driver); + struct mcb_device *mdev = to_mcb_device(dev); + + mdrv->remove(mdev); + + put_device(&mdev->dev); + + return 0; +} + +static void mcb_shutdown(struct device *dev) +{ + struct mcb_device *mdev = to_mcb_device(dev); + struct mcb_driver *mdrv = mdev->driver; + + if (mdrv && mdrv->shutdown) + mdrv->shutdown(mdev); +} + +static struct bus_type mcb_bus_type = { + .name = "mcb", + .match = mcb_match, + .uevent = mcb_uevent, + .probe = mcb_probe, + .remove = mcb_remove, + .shutdown = mcb_shutdown, +}; + +/** + * __mcb_register_driver() - Register a @mcb_driver at the system + * @drv: The @mcb_driver + * @owner: The @mcb_driver's module + * @mod_name: The name of the @mcb_driver's module + * + * Register a @mcb_driver at the system. Perform some sanity checks, if + * the .probe and .remove methods are provided by the driver. + */ +int __mcb_register_driver(struct mcb_driver *drv, struct module *owner, + const char *mod_name) +{ + if (!drv->probe || !drv->remove) + return -EINVAL; + + drv->driver.owner = owner; + drv->driver.bus = &mcb_bus_type; + drv->driver.mod_name = mod_name; + + return driver_register(&drv->driver); +} +EXPORT_SYMBOL_GPL(__mcb_register_driver); + +/** + * mcb_unregister_driver() - Unregister a @mcb_driver from the system + * @drv: The @mcb_driver + * + * Unregister a @mcb_driver from the system. + */ +void mcb_unregister_driver(struct mcb_driver *drv) +{ + driver_unregister(&drv->driver); +} +EXPORT_SYMBOL_GPL(mcb_unregister_driver); + +static void mcb_release_dev(struct device *dev) +{ + struct mcb_device *mdev = to_mcb_device(dev); + + mcb_bus_put(mdev->bus); + kfree(mdev); +} + +/** + * mcb_device_register() - Register a mcb_device + * @bus: The @mcb_bus of the device + * @dev: The @mcb_device + * + * Register a specific @mcb_device at a @mcb_bus and the system itself. + */ +int mcb_device_register(struct mcb_bus *bus, struct mcb_device *dev) +{ + int ret; + int device_id; + + device_initialize(&dev->dev); + dev->dev.bus = &mcb_bus_type; + dev->dev.parent = bus->dev.parent; + dev->dev.release = mcb_release_dev; + + device_id = dev->id; + dev_set_name(&dev->dev, "mcb%d-16z%03d-%d:%d:%d", + bus->bus_nr, device_id, dev->inst, dev->group, dev->var); + + ret = device_add(&dev->dev); + if (ret < 0) { + pr_err("Failed registering device 16z%03d on bus mcb%d (%d)\n", + device_id, bus->bus_nr, ret); + goto out; + } + + return 0; + +out: + + return ret; +} +EXPORT_SYMBOL_GPL(mcb_device_register); + +/** + * mcb_alloc_bus() - Allocate a new @mcb_bus + * + * Allocate a new @mcb_bus. + */ +struct mcb_bus *mcb_alloc_bus(void) +{ + struct mcb_bus *bus; + int bus_nr; + + bus = kzalloc(sizeof(struct mcb_bus), GFP_KERNEL); + if (!bus) + return NULL; + + bus_nr = ida_simple_get(&mcb_ida, 0, 0, GFP_KERNEL); + if (bus_nr < 0) { + kfree(bus); + return ERR_PTR(bus_nr); + } + + INIT_LIST_HEAD(&bus->children); + bus->bus_nr = bus_nr; + + return bus; +} +EXPORT_SYMBOL_GPL(mcb_alloc_bus); + +static int __mcb_devices_unregister(struct device *dev, void *data) +{ + device_unregister(dev); + return 0; +} + +static void mcb_devices_unregister(struct mcb_bus *bus) +{ + bus_for_each_dev(&mcb_bus_type, NULL, NULL, __mcb_devices_unregister); +} +/** + * mcb_release_bus() - Free a @mcb_bus + * @bus: The @mcb_bus to release + * + * Release an allocated @mcb_bus from the system. + */ +void mcb_release_bus(struct mcb_bus *bus) +{ + mcb_devices_unregister(bus); + + ida_simple_remove(&mcb_ida, bus->bus_nr); + + kfree(bus); +} +EXPORT_SYMBOL_GPL(mcb_release_bus); + +/** + * mcb_bus_put() - Increment refcnt + * @bus: The @mcb_bus + * + * Get a @mcb_bus' ref + */ +struct mcb_bus *mcb_bus_get(struct mcb_bus *bus) +{ + if (bus) + get_device(&bus->dev); + + return bus; +} +EXPORT_SYMBOL_GPL(mcb_bus_get); + +/** + * mcb_bus_put() - Decrement refcnt + * @bus: The @mcb_bus + * + * Release a @mcb_bus' ref + */ +void mcb_bus_put(struct mcb_bus *bus) +{ + if (bus) + put_device(&bus->dev); +} +EXPORT_SYMBOL_GPL(mcb_bus_put); + +/** + * mcb_alloc_dev() - Allocate a device + * @bus: The @mcb_bus the device is part of + * + * Allocate a @mcb_device and add bus. + */ +struct mcb_device *mcb_alloc_dev(struct mcb_bus *bus) +{ + struct mcb_device *dev; + + dev = kzalloc(sizeof(struct mcb_device), GFP_KERNEL); + if (!dev) + return NULL; + + INIT_LIST_HEAD(&dev->bus_list); + dev->bus = bus; + + return dev; +} +EXPORT_SYMBOL_GPL(mcb_alloc_dev); + +/** + * mcb_free_dev() - Free @mcb_device + * @dev: The device to free + * + * Free a @mcb_device + */ +void mcb_free_dev(struct mcb_device *dev) +{ + kfree(dev); +} +EXPORT_SYMBOL_GPL(mcb_free_dev); + +static int __mcb_bus_add_devices(struct device *dev, void *data) +{ + struct mcb_device *mdev = to_mcb_device(dev); + int retval; + + if (mdev->is_added) + return 0; + + retval = device_attach(dev); + if (retval < 0) + dev_err(dev, "Error adding device (%d)\n", retval); + + mdev->is_added = true; + + return 0; +} + +static int __mcb_bus_add_child(struct device *dev, void *data) +{ + struct mcb_device *mdev = to_mcb_device(dev); + struct mcb_bus *child; + + BUG_ON(!mdev->is_added); + child = mdev->subordinate; + + if (child) + mcb_bus_add_devices(child); + + return 0; +} + +/** + * mcb_bus_add_devices() - Add devices in the bus' internal device list + * @bus: The @mcb_bus we add the devices + * + * Add devices in the bus' internal device list to the system. + */ +void mcb_bus_add_devices(const struct mcb_bus *bus) +{ + bus_for_each_dev(&mcb_bus_type, NULL, NULL, __mcb_bus_add_devices); + bus_for_each_dev(&mcb_bus_type, NULL, NULL, __mcb_bus_add_child); + +} +EXPORT_SYMBOL_GPL(mcb_bus_add_devices); + +/** + * mcb_request_mem() - Request memory + * @dev: The @mcb_device the memory is for + * @name: The name for the memory reference. + * + * Request memory for a @mcb_device. If @name is NULL the driver name will + * be used. + */ +struct resource *mcb_request_mem(struct mcb_device *dev, const char *name) +{ + struct resource *mem; + u32 size; + + if (!name) + name = dev->dev.driver->name; + + size = resource_size(&dev->mem); + + mem = request_mem_region(dev->mem.start, size, name); + if (!mem) + return ERR_PTR(-EBUSY); + + return mem; +} +EXPORT_SYMBOL_GPL(mcb_request_mem); + +/** + * mcb_release_mem() - Release memory requested by device + * @dev: The @mcb_device that requested the memory + * + * Release memory that was prior requested via @mcb_request_mem(). + */ +void mcb_release_mem(struct resource *mem) +{ + u32 size; + + size = resource_size(mem); + release_mem_region(mem->start, size); +} +EXPORT_SYMBOL_GPL(mcb_release_mem); + +/** + * mcb_get_irq() - Get device's IRQ number + * @dev: The @mcb_device the IRQ is for + * + * Get the IRQ number of a given @mcb_device. + */ +int mcb_get_irq(struct mcb_device *dev) +{ + struct resource *irq = &dev->irq; + + return irq->start; +} +EXPORT_SYMBOL_GPL(mcb_get_irq); + +static int mcb_init(void) +{ + return bus_register(&mcb_bus_type); +} + +static void mcb_exit(void) +{ + bus_unregister(&mcb_bus_type); +} + +/* mcb must be initialized after PCI but before the chameleon drivers. + * That means we must use some initcall between subsys_initcall and + * device_initcall. + */ +fs_initcall(mcb_init); +module_exit(mcb_exit); + +MODULE_DESCRIPTION("MEN Chameleon Bus Driver"); +MODULE_AUTHOR("Johannes Thumshirn <johannes.thumshirn@men.de>"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/mcb/mcb-internal.h b/drivers/mcb/mcb-internal.h new file mode 100644 index 000000000000..f956ef26c0ce --- /dev/null +++ b/drivers/mcb/mcb-internal.h @@ -0,0 +1,118 @@ +#ifndef __MCB_INTERNAL +#define __MCB_INTERNAL + +#include <linux/types.h> + +#define PCI_VENDOR_ID_MEN 0x1a88 +#define PCI_DEVICE_ID_MEN_CHAMELEON 0x4d45 +#define CHAMELEON_FILENAME_LEN 12 +#define CHAMELEONV2_MAGIC 0xabce + +enum chameleon_descriptor_type { + CHAMELEON_DTYPE_GENERAL = 0x0, + CHAMELEON_DTYPE_BRIDGE = 0x1, + CHAMELEON_DTYPE_CPU = 0x2, + CHAMELEON_DTYPE_BAR = 0x3, + CHAMELEON_DTYPE_END = 0xf, +}; + +enum chameleon_bus_type { + CHAMELEON_BUS_WISHBONE, + CHAMELEON_BUS_AVALON, + CHAMELEON_BUS_LPC, + CHAMELEON_BUS_ISA, +}; + +/** + * struct chameleon_fpga_header + * + * @revision: Revison of Chameleon table in FPGA + * @model: Chameleon table model ASCII char + * @minor: Revision minor + * @bus_type: Bus type (usually %CHAMELEON_BUS_WISHBONE) + * @magic: Chameleon header magic number (0xabce for version 2) + * @reserved: Reserved + * @filename: Filename of FPGA bitstream + */ +struct chameleon_fpga_header { + u8 revision; + char model; + u8 minor; + u8 bus_type; + u16 magic; + u16 reserved; + /* This one has no '\0' at the end!!! */ + char filename[CHAMELEON_FILENAME_LEN]; +} __packed; +#define HEADER_MAGIC_OFFSET 0x4 + +/** + * struct chameleon_gdd - Chameleon General Device Descriptor + * + * @irq: the position in the FPGA's IRQ controller vector + * @rev: the revision of the variant's implementation + * @var: the variant of the IP core + * @dev: the device the IP core is + * @dtype: device descriptor type + * @bar: BAR offset that must be added to module offset + * @inst: the instance number of the device, 0 is first instance + * @group: the group the device belongs to (0 = no group) + * @reserved: reserved + * @offset: beginning of the address window of desired module + * @size: size of the module's address window + */ +struct chameleon_gdd { + __le32 reg1; + __le32 reg2; + __le32 offset; + __le32 size; + +} __packed; + +/* GDD Register 1 fields */ +#define GDD_IRQ(x) ((x) & 0x1f) +#define GDD_REV(x) (((x) >> 5) & 0x3f) +#define GDD_VAR(x) (((x) >> 11) & 0x3f) +#define GDD_DEV(x) (((x) >> 18) & 0x3ff) +#define GDD_DTY(x) (((x) >> 28) & 0xf) + +/* GDD Register 2 fields */ +#define GDD_BAR(x) ((x) & 0x7) +#define GDD_INS(x) (((x) >> 3) & 0x3f) +#define GDD_GRP(x) (((x) >> 9) & 0x3f) + +/** + * struct chameleon_bdd - Chameleon Bridge Device Descriptor + * + * @irq: the position in the FPGA's IRQ controller vector + * @rev: the revision of the variant's implementation + * @var: the variant of the IP core + * @dev: the device the IP core is + * @dtype: device descriptor type + * @bar: BAR offset that must be added to module offset + * @inst: the instance number of the device, 0 is first instance + * @dbar: destination bar from the bus _behind_ the bridge + * @chamoff: offset within the BAR of the source bus + * @offset: + * @size: + */ +struct chameleon_bdd { + unsigned int irq:6; + unsigned int rev:6; + unsigned int var:6; + unsigned int dev:10; + unsigned int dtype:4; + unsigned int bar:3; + unsigned int inst:6; + unsigned int dbar:3; + unsigned int group:6; + unsigned int reserved:14; + u32 chamoff; + u32 offset; + u32 size; +} __packed; + +int chameleon_parse_cells(struct mcb_bus *bus, phys_addr_t mapbase, + void __iomem *base); + +#endif diff --git a/drivers/mcb/mcb-parse.c b/drivers/mcb/mcb-parse.c new file mode 100644 index 000000000000..d1278b5f3028 --- /dev/null +++ b/drivers/mcb/mcb-parse.c @@ -0,0 +1,159 @@ +#include <linux/types.h> +#include <linux/ioport.h> +#include <linux/slab.h> +#include <linux/export.h> +#include <linux/io.h> +#include <linux/mcb.h> + +#include "mcb-internal.h" + +struct mcb_parse_priv { + phys_addr_t mapbase; + void __iomem *base; +}; + +#define for_each_chameleon_cell(dtype, p) \ + for ((dtype) = get_next_dtype((p)); \ + (dtype) != CHAMELEON_DTYPE_END; \ + (dtype) = get_next_dtype((p))) + +static inline uint32_t get_next_dtype(void __iomem *p) +{ + uint32_t dtype; + + dtype = readl(p); + return dtype >> 28; +} + +static int chameleon_parse_bdd(struct mcb_bus *bus, + phys_addr_t mapbase, + void __iomem *base) +{ + return 0; +} + +static int chameleon_parse_gdd(struct mcb_bus *bus, + phys_addr_t mapbase, + void __iomem *base) +{ + struct chameleon_gdd __iomem *gdd = + (struct chameleon_gdd __iomem *) base; + struct mcb_device *mdev; + u32 offset; + u32 size; + int ret; + __le32 reg1; + __le32 reg2; + + mdev = mcb_alloc_dev(bus); + if (!mdev) + return -ENOMEM; + + reg1 = readl(&gdd->reg1); + reg2 = readl(&gdd->reg2); + offset = readl(&gdd->offset); + size = readl(&gdd->size); + + mdev->id = GDD_DEV(reg1); + mdev->rev = GDD_REV(reg1); + mdev->var = GDD_VAR(reg1); + mdev->bar = GDD_BAR(reg1); + mdev->group = GDD_GRP(reg2); + mdev->inst = GDD_INS(reg2); + + pr_debug("Found a 16z%03d\n", mdev->id); + + mdev->irq.start = GDD_IRQ(reg1); + mdev->irq.end = GDD_IRQ(reg1); + mdev->irq.flags = IORESOURCE_IRQ; + + mdev->mem.start = mapbase + offset; + mdev->mem.end = mdev->mem.start + size - 1; + mdev->mem.flags = IORESOURCE_MEM; + + mdev->is_added = false; + + ret = mcb_device_register(bus, mdev); + if (ret < 0) + goto err; + + return 0; + +err: + mcb_free_dev(mdev); + + return ret; +} + +int chameleon_parse_cells(struct mcb_bus *bus, phys_addr_t mapbase, + void __iomem *base) +{ + char __iomem *p = base; + struct chameleon_fpga_header *header; + uint32_t dtype; + int num_cells = 0; + int ret = 0; + u32 hsize; + + hsize = sizeof(struct chameleon_fpga_header); + + header = kzalloc(hsize, GFP_KERNEL); + if (!header) + return -ENOMEM; + + /* Extract header information */ + memcpy_fromio(header, p, hsize); + /* We only support chameleon v2 at the moment */ + header->magic = le16_to_cpu(header->magic); + if (header->magic != CHAMELEONV2_MAGIC) { + pr_err("Unsupported chameleon version 0x%x\n", + header->magic); + kfree(header); + return -ENODEV; + } + p += hsize; + + pr_debug("header->revision = %d\n", header->revision); + pr_debug("header->model = 0x%x ('%c')\n", header->model, + header->model); + pr_debug("header->minor = %d\n", header->minor); + pr_debug("header->bus_type = 0x%x\n", header->bus_type); + + + pr_debug("header->magic = 0x%x\n", header->magic); + pr_debug("header->filename = \"%.*s\"\n", CHAMELEON_FILENAME_LEN, + header->filename); + + for_each_chameleon_cell(dtype, p) { + switch (dtype) { + case CHAMELEON_DTYPE_GENERAL: + ret = chameleon_parse_gdd(bus, mapbase, p); + if (ret < 0) + goto out; + p += sizeof(struct chameleon_gdd); + break; + case CHAMELEON_DTYPE_BRIDGE: + chameleon_parse_bdd(bus, mapbase, p); + p += sizeof(struct chameleon_bdd); + break; + case CHAMELEON_DTYPE_END: + break; + default: + pr_err("Invalid chameleon descriptor type 0x%x\n", + dtype); + return -EINVAL; + } + num_cells++; + } + + if (num_cells == 0) + num_cells = -EINVAL; + + kfree(header); + return num_cells; + +out: + kfree(header); + return ret; +} +EXPORT_SYMBOL_GPL(chameleon_parse_cells); diff --git a/drivers/mcb/mcb-pci.c b/drivers/mcb/mcb-pci.c new file mode 100644 index 000000000000..99c742cbfb5b --- /dev/null +++ b/drivers/mcb/mcb-pci.c @@ -0,0 +1,114 @@ +/* + * MEN Chameleon Bus. + * + * Copyright (C) 2014 MEN Mikroelektronik GmbH (www.men.de) + * Author: Johannes Thumshirn <johannes.thumshirn@men.de> + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the Free + * Software Foundation; version 2 of the License. + */ + +#include <linux/module.h> +#include <linux/pci.h> +#include <linux/mcb.h> + +#include "mcb-internal.h" + +struct priv { + struct mcb_bus *bus; + void __iomem *base; +}; + +static int mcb_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id) +{ + struct priv *priv; + phys_addr_t mapbase; + int ret; + int num_cells; + unsigned long flags; + + priv = devm_kzalloc(&pdev->dev, sizeof(struct priv), GFP_KERNEL); + if (!priv) + return -ENOMEM; + + ret = pci_enable_device(pdev); + if (ret) { + dev_err(&pdev->dev, "Failed to enable PCI device\n"); + return -ENODEV; + } + + mapbase = pci_resource_start(pdev, 0); + if (!mapbase) { + dev_err(&pdev->dev, "No PCI resource\n"); + goto err_start; + } + + ret = pci_request_region(pdev, 0, KBUILD_MODNAME); + if (ret) { + dev_err(&pdev->dev, "Failed to request PCI BARs\n"); + goto err_start; + } + + priv->base = pci_iomap(pdev, 0, 0); + if (!priv->base) { + dev_err(&pdev->dev, "Cannot ioremap\n"); + ret = -ENOMEM; + goto err_ioremap; + } + + flags = pci_resource_flags(pdev, 0); + if (flags & IORESOURCE_IO) { + ret = -ENOTSUPP; + dev_err(&pdev->dev, + "IO mapped PCI devices are not supported\n"); + goto err_ioremap; + } + + pci_set_drvdata(pdev, priv); + + priv->bus = mcb_alloc_bus(); + + ret = chameleon_parse_cells(priv->bus, mapbase, priv->base); + if (ret < 0) + goto err_drvdata; + num_cells = ret; + + dev_dbg(&pdev->dev, "Found %d cells\n", num_cells); + + mcb_bus_add_devices(priv->bus); + +err_drvdata: + pci_iounmap(pdev, priv->base); +err_ioremap: + pci_release_region(pdev, 0); +err_start: + pci_disable_device(pdev); + return ret; +} + +static void mcb_pci_remove(struct pci_dev *pdev) +{ + struct priv *priv = pci_get_drvdata(pdev); + + mcb_release_bus(priv->bus); +} + +static const struct pci_device_id mcb_pci_tbl[] = { + { PCI_DEVICE(PCI_VENDOR_ID_MEN, PCI_DEVICE_ID_MEN_CHAMELEON) }, + { 0 }, +}; +MODULE_DEVICE_TABLE(pci, mcb_pci_tbl); + +static struct pci_driver mcb_pci_driver = { + .name = "mcb-pci", + .id_table = mcb_pci_tbl, + .probe = mcb_pci_probe, + .remove = mcb_pci_remove, +}; + +module_pci_driver(mcb_pci_driver); + +MODULE_AUTHOR("Johannes Thumshirn <johannes.thumshirn@men.de>"); +MODULE_LICENSE("GPL"); +MODULE_DESCRIPTION("MCB over PCI support"); diff --git a/drivers/md/dm-log-userspace-transfer.c b/drivers/md/dm-log-userspace-transfer.c index 08d9a207259a..b428c0ae63d5 100644 --- a/drivers/md/dm-log-userspace-transfer.c +++ b/drivers/md/dm-log-userspace-transfer.c @@ -66,7 +66,7 @@ static int dm_ulog_sendto_server(struct dm_ulog_request *tfr) msg->seq = tfr->seq; msg->len = sizeof(struct dm_ulog_request) + tfr->data_size; - r = cn_netlink_send(msg, 0, gfp_any()); + r = cn_netlink_send(msg, 0, 0, gfp_any()); return r; } diff --git a/drivers/memory/Kconfig b/drivers/memory/Kconfig index 29a11db365bc..c59e9c96e86d 100644 --- a/drivers/memory/Kconfig +++ b/drivers/memory/Kconfig @@ -7,6 +7,17 @@ menuconfig MEMORY if MEMORY +config TI_AEMIF + tristate "Texas Instruments AEMIF driver" + depends on (ARCH_DAVINCI || ARCH_KEYSTONE) && OF + help + This driver is for the AEMIF module available in Texas Instruments + SoCs. AEMIF stands for Asynchronous External Memory Interface and + is intended to provide a glue-less interface to a variety of + asynchronuous memory devices like ASRAM, NOR and NAND memory. A total + of 256M bytes of any of these memories can be accessed at a given + time via four chip selects with 64M byte access per chip select. + config TI_EMIF tristate "Texas Instruments EMIF driver" depends on ARCH_OMAP2PLUS @@ -50,4 +61,8 @@ config TEGRA30_MC analysis, especially for IOMMU/SMMU(System Memory Management Unit) module. +config FSL_IFC + bool + depends on FSL_SOC + endif diff --git a/drivers/memory/Makefile b/drivers/memory/Makefile index 969d923dad93..71160a2b7313 100644 --- a/drivers/memory/Makefile +++ b/drivers/memory/Makefile @@ -5,7 +5,9 @@ ifeq ($(CONFIG_DDR),y) obj-$(CONFIG_OF) += of_memory.o endif +obj-$(CONFIG_TI_AEMIF) += ti-aemif.o obj-$(CONFIG_TI_EMIF) += emif.o +obj-$(CONFIG_FSL_IFC) += fsl_ifc.o obj-$(CONFIG_MVEBU_DEVBUS) += mvebu-devbus.o obj-$(CONFIG_TEGRA20_MC) += tegra20-mc.o obj-$(CONFIG_TEGRA30_MC) += tegra30-mc.o diff --git a/drivers/memory/fsl_ifc.c b/drivers/memory/fsl_ifc.c new file mode 100644 index 000000000000..3d5d792d5cb2 --- /dev/null +++ b/drivers/memory/fsl_ifc.c @@ -0,0 +1,309 @@ +/* + * Copyright 2011 Freescale Semiconductor, Inc + * + * Freescale Integrated Flash Controller + * + * Author: Dipen Dudhat <Dipen.Dudhat@freescale.com> + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2 of the License, or (at your + * option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + */ +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/compiler.h> +#include <linux/spinlock.h> +#include <linux/types.h> +#include <linux/slab.h> +#include <linux/io.h> +#include <linux/of.h> +#include <linux/of_device.h> +#include <linux/platform_device.h> +#include <linux/fsl_ifc.h> +#include <asm/prom.h> + +struct fsl_ifc_ctrl *fsl_ifc_ctrl_dev; +EXPORT_SYMBOL(fsl_ifc_ctrl_dev); + +/* + * convert_ifc_address - convert the base address + * @addr_base: base address of the memory bank + */ +unsigned int convert_ifc_address(phys_addr_t addr_base) +{ + return addr_base & CSPR_BA; +} +EXPORT_SYMBOL(convert_ifc_address); + +/* + * fsl_ifc_find - find IFC bank + * @addr_base: base address of the memory bank + * + * This function walks IFC banks comparing "Base address" field of the CSPR + * registers with the supplied addr_base argument. When bases match this + * function returns bank number (starting with 0), otherwise it returns + * appropriate errno value. + */ +int fsl_ifc_find(phys_addr_t addr_base) +{ + int i = 0; + + if (!fsl_ifc_ctrl_dev || !fsl_ifc_ctrl_dev->regs) + return -ENODEV; + + for (i = 0; i < ARRAY_SIZE(fsl_ifc_ctrl_dev->regs->cspr_cs); i++) { + u32 cspr = in_be32(&fsl_ifc_ctrl_dev->regs->cspr_cs[i].cspr); + if (cspr & CSPR_V && (cspr & CSPR_BA) == + convert_ifc_address(addr_base)) + return i; + } + + return -ENOENT; +} +EXPORT_SYMBOL(fsl_ifc_find); + +static int fsl_ifc_ctrl_init(struct fsl_ifc_ctrl *ctrl) +{ + struct fsl_ifc_regs __iomem *ifc = ctrl->regs; + + /* + * Clear all the common status and event registers + */ + if (in_be32(&ifc->cm_evter_stat) & IFC_CM_EVTER_STAT_CSER) + out_be32(&ifc->cm_evter_stat, IFC_CM_EVTER_STAT_CSER); + + /* enable all error and events */ + out_be32(&ifc->cm_evter_en, IFC_CM_EVTER_EN_CSEREN); + + /* enable all error and event interrupts */ + out_be32(&ifc->cm_evter_intr_en, IFC_CM_EVTER_INTR_EN_CSERIREN); + out_be32(&ifc->cm_erattr0, 0x0); + out_be32(&ifc->cm_erattr1, 0x0); + + return 0; +} + +static int fsl_ifc_ctrl_remove(struct platform_device *dev) +{ + struct fsl_ifc_ctrl *ctrl = dev_get_drvdata(&dev->dev); + + free_irq(ctrl->nand_irq, ctrl); + free_irq(ctrl->irq, ctrl); + + irq_dispose_mapping(ctrl->nand_irq); + irq_dispose_mapping(ctrl->irq); + + iounmap(ctrl->regs); + + dev_set_drvdata(&dev->dev, NULL); + kfree(ctrl); + + return 0; +} + +/* + * NAND events are split between an operational interrupt which only + * receives OPC, and an error interrupt that receives everything else, + * including non-NAND errors. Whichever interrupt gets to it first + * records the status and wakes the wait queue. + */ +static DEFINE_SPINLOCK(nand_irq_lock); + +static u32 check_nand_stat(struct fsl_ifc_ctrl *ctrl) +{ + struct fsl_ifc_regs __iomem *ifc = ctrl->regs; + unsigned long flags; + u32 stat; + + spin_lock_irqsave(&nand_irq_lock, flags); + + stat = in_be32(&ifc->ifc_nand.nand_evter_stat); + if (stat) { + out_be32(&ifc->ifc_nand.nand_evter_stat, stat); + ctrl->nand_stat = stat; + wake_up(&ctrl->nand_wait); + } + + spin_unlock_irqrestore(&nand_irq_lock, flags); + + return stat; +} + +static irqreturn_t fsl_ifc_nand_irq(int irqno, void *data) +{ + struct fsl_ifc_ctrl *ctrl = data; + + if (check_nand_stat(ctrl)) + return IRQ_HANDLED; + + return IRQ_NONE; +} + +/* + * NOTE: This interrupt is used to report ifc events of various kinds, + * such as transaction errors on the chipselects. + */ +static irqreturn_t fsl_ifc_ctrl_irq(int irqno, void *data) +{ + struct fsl_ifc_ctrl *ctrl = data; + struct fsl_ifc_regs __iomem *ifc = ctrl->regs; + u32 err_axiid, err_srcid, status, cs_err, err_addr; + irqreturn_t ret = IRQ_NONE; + + /* read for chip select error */ + cs_err = in_be32(&ifc->cm_evter_stat); + if (cs_err) { + dev_err(ctrl->dev, "transaction sent to IFC is not mapped to" + "any memory bank 0x%08X\n", cs_err); + /* clear the chip select error */ + out_be32(&ifc->cm_evter_stat, IFC_CM_EVTER_STAT_CSER); + + /* read error attribute registers print the error information */ + status = in_be32(&ifc->cm_erattr0); + err_addr = in_be32(&ifc->cm_erattr1); + + if (status & IFC_CM_ERATTR0_ERTYP_READ) + dev_err(ctrl->dev, "Read transaction error" + "CM_ERATTR0 0x%08X\n", status); + else + dev_err(ctrl->dev, "Write transaction error" + "CM_ERATTR0 0x%08X\n", status); + + err_axiid = (status & IFC_CM_ERATTR0_ERAID) >> + IFC_CM_ERATTR0_ERAID_SHIFT; + dev_err(ctrl->dev, "AXI ID of the error" + "transaction 0x%08X\n", err_axiid); + + err_srcid = (status & IFC_CM_ERATTR0_ESRCID) >> + IFC_CM_ERATTR0_ESRCID_SHIFT; + dev_err(ctrl->dev, "SRC ID of the error" + "transaction 0x%08X\n", err_srcid); + + dev_err(ctrl->dev, "Transaction Address corresponding to error" + "ERADDR 0x%08X\n", err_addr); + + ret = IRQ_HANDLED; + } + + if (check_nand_stat(ctrl)) + ret = IRQ_HANDLED; + + return ret; +} + +/* + * fsl_ifc_ctrl_probe + * + * called by device layer when it finds a device matching + * one our driver can handled. This code allocates all of + * the resources needed for the controller only. The + * resources for the NAND banks themselves are allocated + * in the chip probe function. +*/ +static int fsl_ifc_ctrl_probe(struct platform_device *dev) +{ + int ret = 0; + + + dev_info(&dev->dev, "Freescale Integrated Flash Controller\n"); + + fsl_ifc_ctrl_dev = kzalloc(sizeof(*fsl_ifc_ctrl_dev), GFP_KERNEL); + if (!fsl_ifc_ctrl_dev) + return -ENOMEM; + + dev_set_drvdata(&dev->dev, fsl_ifc_ctrl_dev); + + /* IOMAP the entire IFC region */ + fsl_ifc_ctrl_dev->regs = of_iomap(dev->dev.of_node, 0); + if (!fsl_ifc_ctrl_dev->regs) { + dev_err(&dev->dev, "failed to get memory region\n"); + ret = -ENODEV; + goto err; + } + + /* get the Controller level irq */ + fsl_ifc_ctrl_dev->irq = irq_of_parse_and_map(dev->dev.of_node, 0); + if (fsl_ifc_ctrl_dev->irq == NO_IRQ) { + dev_err(&dev->dev, "failed to get irq resource " + "for IFC\n"); + ret = -ENODEV; + goto err; + } + + /* get the nand machine irq */ + fsl_ifc_ctrl_dev->nand_irq = + irq_of_parse_and_map(dev->dev.of_node, 1); + + fsl_ifc_ctrl_dev->dev = &dev->dev; + + ret = fsl_ifc_ctrl_init(fsl_ifc_ctrl_dev); + if (ret < 0) + goto err; + + init_waitqueue_head(&fsl_ifc_ctrl_dev->nand_wait); + + ret = request_irq(fsl_ifc_ctrl_dev->irq, fsl_ifc_ctrl_irq, IRQF_SHARED, + "fsl-ifc", fsl_ifc_ctrl_dev); + if (ret != 0) { + dev_err(&dev->dev, "failed to install irq (%d)\n", + fsl_ifc_ctrl_dev->irq); + goto err_irq; + } + + if (fsl_ifc_ctrl_dev->nand_irq) { + ret = request_irq(fsl_ifc_ctrl_dev->nand_irq, fsl_ifc_nand_irq, + 0, "fsl-ifc-nand", fsl_ifc_ctrl_dev); + if (ret != 0) { + dev_err(&dev->dev, "failed to install irq (%d)\n", + fsl_ifc_ctrl_dev->nand_irq); + goto err_nandirq; + } + } + + return 0; + +err_nandirq: + free_irq(fsl_ifc_ctrl_dev->nand_irq, fsl_ifc_ctrl_dev); + irq_dispose_mapping(fsl_ifc_ctrl_dev->nand_irq); +err_irq: + free_irq(fsl_ifc_ctrl_dev->irq, fsl_ifc_ctrl_dev); + irq_dispose_mapping(fsl_ifc_ctrl_dev->irq); +err: + return ret; +} + +static const struct of_device_id fsl_ifc_match[] = { + { + .compatible = "fsl,ifc", + }, + {}, +}; + +static struct platform_driver fsl_ifc_ctrl_driver = { + .driver = { + .name = "fsl-ifc", + .of_match_table = fsl_ifc_match, + }, + .probe = fsl_ifc_ctrl_probe, + .remove = fsl_ifc_ctrl_remove, +}; + +static int __init fsl_ifc_init(void) +{ + return platform_driver_register(&fsl_ifc_ctrl_driver); +} +subsys_initcall(fsl_ifc_init); + +MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Freescale Semiconductor"); +MODULE_DESCRIPTION("Freescale Integrated Flash Controller driver"); diff --git a/drivers/memory/ti-aemif.c b/drivers/memory/ti-aemif.c new file mode 100644 index 000000000000..d3df7602f406 --- /dev/null +++ b/drivers/memory/ti-aemif.c @@ -0,0 +1,427 @@ +/* + * TI AEMIF driver + * + * Copyright (C) 2010 - 2013 Texas Instruments Incorporated. http://www.ti.com/ + * + * Authors: + * Murali Karicheri <m-karicheri2@ti.com> + * Ivan Khoronzhuk <ivan.khoronzhuk@ti.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include <linux/clk.h> +#include <linux/err.h> +#include <linux/io.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/of_platform.h> +#include <linux/platform_device.h> + +#define TA_SHIFT 2 +#define RHOLD_SHIFT 4 +#define RSTROBE_SHIFT 7 +#define RSETUP_SHIFT 13 +#define WHOLD_SHIFT 17 +#define WSTROBE_SHIFT 20 +#define WSETUP_SHIFT 26 +#define EW_SHIFT 30 +#define SS_SHIFT 31 + +#define TA(x) ((x) << TA_SHIFT) +#define RHOLD(x) ((x) << RHOLD_SHIFT) +#define RSTROBE(x) ((x) << RSTROBE_SHIFT) +#define RSETUP(x) ((x) << RSETUP_SHIFT) +#define WHOLD(x) ((x) << WHOLD_SHIFT) +#define WSTROBE(x) ((x) << WSTROBE_SHIFT) +#define WSETUP(x) ((x) << WSETUP_SHIFT) +#define EW(x) ((x) << EW_SHIFT) +#define SS(x) ((x) << SS_SHIFT) + +#define ASIZE_MAX 0x1 +#define TA_MAX 0x3 +#define RHOLD_MAX 0x7 +#define RSTROBE_MAX 0x3f +#define RSETUP_MAX 0xf +#define WHOLD_MAX 0x7 +#define WSTROBE_MAX 0x3f +#define WSETUP_MAX 0xf +#define EW_MAX 0x1 +#define SS_MAX 0x1 +#define NUM_CS 4 + +#define TA_VAL(x) (((x) & TA(TA_MAX)) >> TA_SHIFT) +#define RHOLD_VAL(x) (((x) & RHOLD(RHOLD_MAX)) >> RHOLD_SHIFT) +#define RSTROBE_VAL(x) (((x) & RSTROBE(RSTROBE_MAX)) >> RSTROBE_SHIFT) +#define RSETUP_VAL(x) (((x) & RSETUP(RSETUP_MAX)) >> RSETUP_SHIFT) +#define WHOLD_VAL(x) (((x) & WHOLD(WHOLD_MAX)) >> WHOLD_SHIFT) +#define WSTROBE_VAL(x) (((x) & WSTROBE(WSTROBE_MAX)) >> WSTROBE_SHIFT) +#define WSETUP_VAL(x) (((x) & WSETUP(WSETUP_MAX)) >> WSETUP_SHIFT) +#define EW_VAL(x) (((x) & EW(EW_MAX)) >> EW_SHIFT) +#define SS_VAL(x) (((x) & SS(SS_MAX)) >> SS_SHIFT) + +#define NRCSR_OFFSET 0x00 +#define AWCCR_OFFSET 0x04 +#define A1CR_OFFSET 0x10 + +#define ACR_ASIZE_MASK 0x3 +#define ACR_EW_MASK BIT(30) +#define ACR_SS_MASK BIT(31) +#define ASIZE_16BIT 1 + +#define CONFIG_MASK (TA(TA_MAX) | \ + RHOLD(RHOLD_MAX) | \ + RSTROBE(RSTROBE_MAX) | \ + RSETUP(RSETUP_MAX) | \ + WHOLD(WHOLD_MAX) | \ + WSTROBE(WSTROBE_MAX) | \ + WSETUP(WSETUP_MAX) | \ + EW(EW_MAX) | SS(SS_MAX) | \ + ASIZE_MAX) + +/** + * struct aemif_cs_data: structure to hold cs parameters + * @cs: chip-select number + * @wstrobe: write strobe width, ns + * @rstrobe: read strobe width, ns + * @wsetup: write setup width, ns + * @whold: write hold width, ns + * @rsetup: read setup width, ns + * @rhold: read hold width, ns + * @ta: minimum turn around time, ns + * @enable_ss: enable/disable select strobe mode + * @enable_ew: enable/disable extended wait mode + * @asize: width of the asynchronous device's data bus + */ +struct aemif_cs_data { + u8 cs; + u16 wstrobe; + u16 rstrobe; + u8 wsetup; + u8 whold; + u8 rsetup; + u8 rhold; + u8 ta; + u8 enable_ss; + u8 enable_ew; + u8 asize; +}; + +/** + * struct aemif_device: structure to hold device data + * @base: base address of AEMIF registers + * @clk: source clock + * @clk_rate: clock's rate in kHz + * @num_cs: number of assigned chip-selects + * @cs_offset: start number of cs nodes + * @cs_data: array of chip-select settings + */ +struct aemif_device { + void __iomem *base; + struct clk *clk; + unsigned long clk_rate; + u8 num_cs; + int cs_offset; + struct aemif_cs_data cs_data[NUM_CS]; +}; + +/** + * aemif_calc_rate - calculate timing data. + * @pdev: platform device to calculate for + * @wanted: The cycle time needed in nanoseconds. + * @clk: The input clock rate in kHz. + * @max: The maximum divider value that can be programmed. + * + * On success, returns the calculated timing value minus 1 for easy + * programming into AEMIF timing registers, else negative errno. + */ +static int aemif_calc_rate(struct platform_device *pdev, int wanted, + unsigned long clk, int max) +{ + int result; + + result = DIV_ROUND_UP((wanted * clk), NSEC_PER_MSEC) - 1; + + dev_dbg(&pdev->dev, "%s: result %d from %ld, %d\n", __func__, result, + clk, wanted); + + /* It is generally OK to have a more relaxed timing than requested... */ + if (result < 0) + result = 0; + + /* ... But configuring tighter timings is not an option. */ + else if (result > max) + result = -EINVAL; + + return result; +} + +/** + * aemif_config_abus - configure async bus parameters + * @pdev: platform device to configure for + * @csnum: aemif chip select number + * + * This function programs the given timing values (in real clock) into the + * AEMIF registers taking the AEMIF clock into account. + * + * This function does not use any locking while programming the AEMIF + * because it is expected that there is only one user of a given + * chip-select. + * + * Returns 0 on success, else negative errno. + */ +static int aemif_config_abus(struct platform_device *pdev, int csnum) +{ + struct aemif_device *aemif = platform_get_drvdata(pdev); + struct aemif_cs_data *data = &aemif->cs_data[csnum]; + int ta, rhold, rstrobe, rsetup, whold, wstrobe, wsetup; + unsigned long clk_rate = aemif->clk_rate; + unsigned offset; + u32 set, val; + + offset = A1CR_OFFSET + (data->cs - aemif->cs_offset) * 4; + + ta = aemif_calc_rate(pdev, data->ta, clk_rate, TA_MAX); + rhold = aemif_calc_rate(pdev, data->rhold, clk_rate, RHOLD_MAX); + rstrobe = aemif_calc_rate(pdev, data->rstrobe, clk_rate, RSTROBE_MAX); + rsetup = aemif_calc_rate(pdev, data->rsetup, clk_rate, RSETUP_MAX); + whold = aemif_calc_rate(pdev, data->whold, clk_rate, WHOLD_MAX); + wstrobe = aemif_calc_rate(pdev, data->wstrobe, clk_rate, WSTROBE_MAX); + wsetup = aemif_calc_rate(pdev, data->wsetup, clk_rate, WSETUP_MAX); + + if (ta < 0 || rhold < 0 || rstrobe < 0 || rsetup < 0 || + whold < 0 || wstrobe < 0 || wsetup < 0) { + dev_err(&pdev->dev, "%s: cannot get suitable timings\n", + __func__); + return -EINVAL; + } + + set = TA(ta) | RHOLD(rhold) | RSTROBE(rstrobe) | RSETUP(rsetup) | + WHOLD(whold) | WSTROBE(wstrobe) | WSETUP(wsetup); + + set |= (data->asize & ACR_ASIZE_MASK); + if (data->enable_ew) + set |= ACR_EW_MASK; + if (data->enable_ss) + set |= ACR_SS_MASK; + + val = readl(aemif->base + offset); + val &= ~CONFIG_MASK; + val |= set; + writel(val, aemif->base + offset); + + return 0; +} + +static inline int aemif_cycles_to_nsec(int val, unsigned long clk_rate) +{ + return ((val + 1) * NSEC_PER_MSEC) / clk_rate; +} + +/** + * aemif_get_hw_params - function to read hw register values + * @pdev: platform device to read for + * @csnum: aemif chip select number + * + * This function reads the defaults from the registers and update + * the timing values. Required for get/set commands and also for + * the case when driver needs to use defaults in hardware. + */ +static void aemif_get_hw_params(struct platform_device *pdev, int csnum) +{ + struct aemif_device *aemif = platform_get_drvdata(pdev); + struct aemif_cs_data *data = &aemif->cs_data[csnum]; + unsigned long clk_rate = aemif->clk_rate; + u32 val, offset; + + offset = A1CR_OFFSET + (data->cs - aemif->cs_offset) * 4; + val = readl(aemif->base + offset); + + data->ta = aemif_cycles_to_nsec(TA_VAL(val), clk_rate); + data->rhold = aemif_cycles_to_nsec(RHOLD_VAL(val), clk_rate); + data->rstrobe = aemif_cycles_to_nsec(RSTROBE_VAL(val), clk_rate); + data->rsetup = aemif_cycles_to_nsec(RSETUP_VAL(val), clk_rate); + data->whold = aemif_cycles_to_nsec(WHOLD_VAL(val), clk_rate); + data->wstrobe = aemif_cycles_to_nsec(WSTROBE_VAL(val), clk_rate); + data->wsetup = aemif_cycles_to_nsec(WSETUP_VAL(val), clk_rate); + data->enable_ew = EW_VAL(val); + data->enable_ss = SS_VAL(val); + data->asize = val & ASIZE_MAX; +} + +/** + * of_aemif_parse_abus_config - parse CS configuration from DT + * @pdev: platform device to parse for + * @np: device node ptr + * + * This function update the emif async bus configuration based on the values + * configured in a cs device binding node. + */ +static int of_aemif_parse_abus_config(struct platform_device *pdev, + struct device_node *np) +{ + struct aemif_device *aemif = platform_get_drvdata(pdev); + struct aemif_cs_data *data; + u32 cs; + u32 val; + + if (of_property_read_u32(np, "ti,cs-chipselect", &cs)) { + dev_dbg(&pdev->dev, "cs property is required"); + return -EINVAL; + } + + if (cs - aemif->cs_offset >= NUM_CS || cs < aemif->cs_offset) { + dev_dbg(&pdev->dev, "cs number is incorrect %d", cs); + return -EINVAL; + } + + if (aemif->num_cs >= NUM_CS) { + dev_dbg(&pdev->dev, "cs count is more than %d", NUM_CS); + return -EINVAL; + } + + data = &aemif->cs_data[aemif->num_cs]; + data->cs = cs; + + /* read the current value in the hw register */ + aemif_get_hw_params(pdev, aemif->num_cs++); + + /* override the values from device node */ + if (!of_property_read_u32(np, "ti,cs-min-turnaround-ns", &val)) + data->ta = val; + + if (!of_property_read_u32(np, "ti,cs-read-hold-ns", &val)) + data->rhold = val; + + if (!of_property_read_u32(np, "ti,cs-read-strobe-ns", &val)) + data->rstrobe = val; + + if (!of_property_read_u32(np, "ti,cs-read-setup-ns", &val)) + data->rsetup = val; + + if (!of_property_read_u32(np, "ti,cs-write-hold-ns", &val)) + data->whold = val; + + if (!of_property_read_u32(np, "ti,cs-write-strobe-ns", &val)) + data->wstrobe = val; + + if (!of_property_read_u32(np, "ti,cs-write-setup-ns", &val)) + data->wsetup = val; + + if (!of_property_read_u32(np, "ti,cs-bus-width", &val)) + if (val == 16) + data->asize = 1; + data->enable_ew = of_property_read_bool(np, "ti,cs-extended-wait-mode"); + data->enable_ss = of_property_read_bool(np, "ti,cs-select-strobe-mode"); + return 0; +} + +static const struct of_device_id aemif_of_match[] = { + { .compatible = "ti,davinci-aemif", }, + { .compatible = "ti,da850-aemif", }, + {}, +}; + +static int aemif_probe(struct platform_device *pdev) +{ + int i; + int ret = -ENODEV; + struct resource *res; + struct device *dev = &pdev->dev; + struct device_node *np = dev->of_node; + struct device_node *child_np; + struct aemif_device *aemif; + + if (np == NULL) + return 0; + + aemif = devm_kzalloc(dev, sizeof(*aemif), GFP_KERNEL); + if (!aemif) + return -ENOMEM; + + platform_set_drvdata(pdev, aemif); + + aemif->clk = devm_clk_get(dev, NULL); + if (IS_ERR(aemif->clk)) { + dev_err(dev, "cannot get clock 'aemif'\n"); + return PTR_ERR(aemif->clk); + } + + clk_prepare_enable(aemif->clk); + aemif->clk_rate = clk_get_rate(aemif->clk) / MSEC_PER_SEC; + + if (of_device_is_compatible(np, "ti,da850-aemif")) + aemif->cs_offset = 2; + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + aemif->base = devm_ioremap_resource(dev, res); + if (IS_ERR(aemif->base)) { + ret = PTR_ERR(aemif->base); + goto error; + } + + /* + * For every controller device node, there is a cs device node that + * describe the bus configuration parameters. This functions iterate + * over these nodes and update the cs data array. + */ + for_each_available_child_of_node(np, child_np) { + ret = of_aemif_parse_abus_config(pdev, child_np); + if (ret < 0) + goto error; + } + + for (i = 0; i < aemif->num_cs; i++) { + ret = aemif_config_abus(pdev, i); + if (ret < 0) { + dev_err(dev, "Error configuring chip select %d\n", + aemif->cs_data[i].cs); + goto error; + } + } + + /* + * Create a child devices explicitly from here to + * guarantee that the child will be probed after the AEMIF timing + * parameters are set. + */ + for_each_available_child_of_node(np, child_np) { + ret = of_platform_populate(child_np, NULL, NULL, dev); + if (ret < 0) + goto error; + } + + return 0; +error: + clk_disable_unprepare(aemif->clk); + return ret; +} + +static int aemif_remove(struct platform_device *pdev) +{ + struct aemif_device *aemif = platform_get_drvdata(pdev); + + clk_disable_unprepare(aemif->clk); + return 0; +} + +static struct platform_driver aemif_driver = { + .probe = aemif_probe, + .remove = aemif_remove, + .driver = { + .name = KBUILD_MODNAME, + .owner = THIS_MODULE, + .of_match_table = of_match_ptr(aemif_of_match), + }, +}; + +module_platform_driver(aemif_driver); + +MODULE_AUTHOR("Murali Karicheri <m-karicheri2@ti.com>"); +MODULE_AUTHOR("Ivan Khoronzhuk <ivan.khoronzhuk@ti.com>"); +MODULE_DESCRIPTION("Texas Instruments AEMIF driver"); +MODULE_LICENSE("GPL v2"); +MODULE_ALIAS("platform:" KBUILD_MODNAME); diff --git a/drivers/misc/Kconfig b/drivers/misc/Kconfig index 6cb388e8fb7d..809afebe0dad 100644 --- a/drivers/misc/Kconfig +++ b/drivers/misc/Kconfig @@ -235,7 +235,7 @@ config SGI_XP config CS5535_MFGPT tristate "CS5535/CS5536 Geode Multi-Function General Purpose Timer (MFGPT) support" - depends on PCI && X86 && MFD_CS5535 + depends on MFD_CS5535 default n help This driver provides access to MFGPT functionality for other diff --git a/drivers/misc/ad525x_dpot.c b/drivers/misc/ad525x_dpot.c index d3eee113baeb..a43053daad0e 100644 --- a/drivers/misc/ad525x_dpot.c +++ b/drivers/misc/ad525x_dpot.c @@ -72,7 +72,6 @@ #include <linux/module.h> #include <linux/device.h> #include <linux/kernel.h> -#include <linux/init.h> #include <linux/delay.h> #include <linux/slab.h> diff --git a/drivers/misc/apds9802als.c b/drivers/misc/apds9802als.c index 0c6e037153d2..c6cc3dc8ae1f 100644 --- a/drivers/misc/apds9802als.c +++ b/drivers/misc/apds9802als.c @@ -22,7 +22,6 @@ */ #include <linux/module.h> -#include <linux/init.h> #include <linux/slab.h> #include <linux/i2c.h> #include <linux/err.h> diff --git a/drivers/misc/bmp085.c b/drivers/misc/bmp085.c index 820e53d0048f..9b313f7810f5 100644 --- a/drivers/misc/bmp085.c +++ b/drivers/misc/bmp085.c @@ -47,7 +47,6 @@ #include <linux/module.h> #include <linux/device.h> -#include <linux/init.h> #include <linux/slab.h> #include <linux/of.h> #include "bmp085.h" diff --git a/drivers/misc/carma/carma-fpga.c b/drivers/misc/carma/carma-fpga.c index 9e2b985293fc..14d90eae605b 100644 --- a/drivers/misc/carma/carma-fpga.c +++ b/drivers/misc/carma/carma-fpga.c @@ -101,7 +101,6 @@ #include <linux/kernel.h> #include <linux/module.h> #include <linux/poll.h> -#include <linux/init.h> #include <linux/slab.h> #include <linux/kref.h> #include <linux/io.h> diff --git a/drivers/misc/ds1682.c b/drivers/misc/ds1682.c index 154b02e5094f..6a672f9ef522 100644 --- a/drivers/misc/ds1682.c +++ b/drivers/misc/ds1682.c @@ -32,7 +32,6 @@ */ #include <linux/module.h> -#include <linux/init.h> #include <linux/i2c.h> #include <linux/string.h> #include <linux/list.h> diff --git a/drivers/misc/eeprom/at25.c b/drivers/misc/eeprom/at25.c index 4f3bca1003a1..634f72929e12 100644 --- a/drivers/misc/eeprom/at25.c +++ b/drivers/misc/eeprom/at25.c @@ -10,7 +10,6 @@ */ #include <linux/kernel.h> -#include <linux/init.h> #include <linux/module.h> #include <linux/slab.h> #include <linux/delay.h> diff --git a/drivers/misc/eeprom/eeprom.c b/drivers/misc/eeprom/eeprom.c index f0fa4e8ca124..33f8673d23a6 100644 --- a/drivers/misc/eeprom/eeprom.c +++ b/drivers/misc/eeprom/eeprom.c @@ -17,7 +17,6 @@ */ #include <linux/kernel.h> -#include <linux/init.h> #include <linux/module.h> #include <linux/slab.h> #include <linux/jiffies.h> diff --git a/drivers/misc/eeprom/eeprom_93xx46.c b/drivers/misc/eeprom/eeprom_93xx46.c index 78e55b501c94..9ebeacdb8ec4 100644 --- a/drivers/misc/eeprom/eeprom_93xx46.c +++ b/drivers/misc/eeprom/eeprom_93xx46.c @@ -11,7 +11,6 @@ #include <linux/delay.h> #include <linux/device.h> #include <linux/kernel.h> -#include <linux/init.h> #include <linux/module.h> #include <linux/mutex.h> #include <linux/slab.h> diff --git a/drivers/misc/eeprom/max6875.c b/drivers/misc/eeprom/max6875.c index e36157d5d3ab..580ff9df5529 100644 --- a/drivers/misc/eeprom/max6875.c +++ b/drivers/misc/eeprom/max6875.c @@ -27,7 +27,6 @@ */ #include <linux/kernel.h> -#include <linux/init.h> #include <linux/module.h> #include <linux/slab.h> #include <linux/i2c.h> diff --git a/drivers/misc/eeprom/sunxi_sid.c b/drivers/misc/eeprom/sunxi_sid.c index 9c34e5704304..3f2b625b2032 100644 --- a/drivers/misc/eeprom/sunxi_sid.c +++ b/drivers/misc/eeprom/sunxi_sid.c @@ -21,7 +21,6 @@ #include <linux/err.h> #include <linux/export.h> #include <linux/fs.h> -#include <linux/init.h> #include <linux/io.h> #include <linux/kernel.h> #include <linux/kobject.h> @@ -96,7 +95,7 @@ static int sunxi_sid_remove(struct platform_device *pdev) } static const struct of_device_id sunxi_sid_of_match[] = { - { .compatible = "allwinner,sun4i-sid", .data = (void *)16}, + { .compatible = "allwinner,sun4i-a10-sid", .data = (void *)16}, { .compatible = "allwinner,sun7i-a20-sid", .data = (void *)512}, {/* sentinel */}, }; diff --git a/drivers/misc/genwqe/card_debugfs.c b/drivers/misc/genwqe/card_debugfs.c index 3bfdc07a7248..50d2096ea1c7 100644 --- a/drivers/misc/genwqe/card_debugfs.c +++ b/drivers/misc/genwqe/card_debugfs.c @@ -26,7 +26,6 @@ #include <linux/module.h> #include <linux/kernel.h> -#include <linux/init.h> #include <linux/debugfs.h> #include <linux/seq_file.h> #include <linux/uaccess.h> diff --git a/drivers/misc/hmc6352.c b/drivers/misc/hmc6352.c index 170bd3daf336..90520d76633f 100644 --- a/drivers/misc/hmc6352.c +++ b/drivers/misc/hmc6352.c @@ -22,7 +22,6 @@ */ #include <linux/module.h> -#include <linux/init.h> #include <linux/slab.h> #include <linux/i2c.h> #include <linux/err.h> diff --git a/drivers/misc/isl29003.c b/drivers/misc/isl29003.c index e3183f26216b..12c30b486b27 100644 --- a/drivers/misc/isl29003.c +++ b/drivers/misc/isl29003.c @@ -26,7 +26,6 @@ */ #include <linux/module.h> -#include <linux/init.h> #include <linux/slab.h> #include <linux/i2c.h> #include <linux/mutex.h> diff --git a/drivers/misc/isl29020.c b/drivers/misc/isl29020.c index b7f84dacf822..4a9c50a43afb 100644 --- a/drivers/misc/isl29020.c +++ b/drivers/misc/isl29020.c @@ -23,7 +23,6 @@ */ #include <linux/module.h> -#include <linux/init.h> #include <linux/slab.h> #include <linux/i2c.h> #include <linux/err.h> diff --git a/drivers/misc/lattice-ecp3-config.c b/drivers/misc/lattice-ecp3-config.c index 61fbe6acabef..0a1565e63c71 100644 --- a/drivers/misc/lattice-ecp3-config.c +++ b/drivers/misc/lattice-ecp3-config.c @@ -12,7 +12,6 @@ #include <linux/module.h> #include <linux/errno.h> #include <linux/kernel.h> -#include <linux/init.h> #include <linux/spi/spi.h> #include <linux/platform_device.h> #include <linux/delay.h> diff --git a/drivers/misc/lis3lv02d/lis3lv02d.c b/drivers/misc/lis3lv02d/lis3lv02d.c index 036effe9a795..3ef4627f9cb1 100644 --- a/drivers/misc/lis3lv02d/lis3lv02d.c +++ b/drivers/misc/lis3lv02d/lis3lv02d.c @@ -23,7 +23,6 @@ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt #include <linux/kernel.h> -#include <linux/init.h> #include <linux/dmi.h> #include <linux/module.h> #include <linux/types.h> diff --git a/drivers/misc/lis3lv02d/lis3lv02d_i2c.c b/drivers/misc/lis3lv02d/lis3lv02d_i2c.c index 7c97550240f1..d324f8a97b88 100644 --- a/drivers/misc/lis3lv02d/lis3lv02d_i2c.c +++ b/drivers/misc/lis3lv02d/lis3lv02d_i2c.c @@ -26,7 +26,6 @@ #include <linux/module.h> #include <linux/kernel.h> -#include <linux/init.h> #include <linux/err.h> #include <linux/i2c.h> #include <linux/pm_runtime.h> diff --git a/drivers/misc/lis3lv02d/lis3lv02d_spi.c b/drivers/misc/lis3lv02d/lis3lv02d_spi.c index 9aa2bd2a71ae..bd06d0cfac45 100644 --- a/drivers/misc/lis3lv02d/lis3lv02d_spi.c +++ b/drivers/misc/lis3lv02d/lis3lv02d_spi.c @@ -10,7 +10,6 @@ #include <linux/module.h> #include <linux/kernel.h> -#include <linux/init.h> #include <linux/err.h> #include <linux/input.h> #include <linux/interrupt.h> diff --git a/drivers/misc/lkdtm.c b/drivers/misc/lkdtm.c index 49c7a23f02fc..d66a2f24f6b3 100644 --- a/drivers/misc/lkdtm.c +++ b/drivers/misc/lkdtm.c @@ -30,6 +30,7 @@ * * See Documentation/fault-injection/provoke-crashes.txt for instructions */ +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt #include <linux/kernel.h> #include <linux/fs.h> @@ -45,6 +46,7 @@ #include <linux/debugfs.h> #include <linux/vmalloc.h> #include <linux/mman.h> +#include <asm/cacheflush.h> #ifdef CONFIG_IDE #include <linux/ide.h> @@ -101,6 +103,7 @@ enum ctype { CT_EXEC_USERSPACE, CT_ACCESS_USERSPACE, CT_WRITE_RO, + CT_WRITE_KERN, }; static char* cp_name[] = { @@ -137,6 +140,7 @@ static char* cp_type[] = { "EXEC_USERSPACE", "ACCESS_USERSPACE", "WRITE_RO", + "WRITE_KERN", }; static struct jprobe lkdtm; @@ -316,6 +320,13 @@ static void do_nothing(void) return; } +/* Must immediately follow do_nothing for size calculuations to work out. */ +static void do_overwritten(void) +{ + pr_info("do_overwritten wasn't overwritten!\n"); + return; +} + static noinline void corrupt_stack(void) { /* Use default char array length that triggers stack protection. */ @@ -328,7 +339,12 @@ static void execute_location(void *dst) { void (*func)(void) = dst; + pr_info("attempting ok execution at %p\n", do_nothing); + do_nothing(); + memcpy(dst, do_nothing, EXEC_SIZE); + flush_icache_range((unsigned long)dst, (unsigned long)dst + EXEC_SIZE); + pr_info("attempting bad execution at %p\n", func); func(); } @@ -337,8 +353,13 @@ static void execute_user_location(void *dst) /* Intentionally crossing kernel/user memory boundary. */ void (*func)(void) = dst; + pr_info("attempting ok execution at %p\n", do_nothing); + do_nothing(); + if (copy_to_user((void __user *)dst, do_nothing, EXEC_SIZE)) return; + flush_icache_range((unsigned long)dst, (unsigned long)dst + EXEC_SIZE); + pr_info("attempting bad execution at %p\n", func); func(); } @@ -463,8 +484,12 @@ static void lkdtm_do_action(enum ctype which) } ptr = (unsigned long *)user_addr; + + pr_info("attempting bad read at %p\n", ptr); tmp = *ptr; tmp += 0xc0dec0de; + + pr_info("attempting bad write at %p\n", ptr); *ptr = tmp; vm_munmap(user_addr, PAGE_SIZE); @@ -475,10 +500,28 @@ static void lkdtm_do_action(enum ctype which) unsigned long *ptr; ptr = (unsigned long *)&rodata; + + pr_info("attempting bad write at %p\n", ptr); *ptr ^= 0xabcd1234; break; } + case CT_WRITE_KERN: { + size_t size; + unsigned char *ptr; + + size = (unsigned long)do_overwritten - + (unsigned long)do_nothing; + ptr = (unsigned char *)do_overwritten; + + pr_info("attempting bad %zu byte write at %p\n", size, ptr); + memcpy(ptr, (unsigned char *)do_nothing, size); + flush_icache_range((unsigned long)ptr, + (unsigned long)(ptr + size)); + + do_overwritten(); + break; + } case CT_NONE: default: break; @@ -493,8 +536,8 @@ static void lkdtm_handler(void) spin_lock_irqsave(&count_lock, flags); count--; - printk(KERN_INFO "lkdtm: Crash point %s of type %s hit, trigger in %d rounds\n", - cp_name_to_str(cpoint), cp_type_to_str(cptype), count); + pr_info("Crash point %s of type %s hit, trigger in %d rounds\n", + cp_name_to_str(cpoint), cp_type_to_str(cptype), count); if (count == 0) { do_it = true; @@ -551,18 +594,18 @@ static int lkdtm_register_cpoint(enum cname which) lkdtm.kp.symbol_name = "generic_ide_ioctl"; lkdtm.entry = (kprobe_opcode_t*) jp_generic_ide_ioctl; #else - printk(KERN_INFO "lkdtm: Crash point not available\n"); + pr_info("Crash point not available\n"); return -EINVAL; #endif break; default: - printk(KERN_INFO "lkdtm: Invalid Crash Point\n"); + pr_info("Invalid Crash Point\n"); return -EINVAL; } cpoint = which; if ((ret = register_jprobe(&lkdtm)) < 0) { - printk(KERN_INFO "lkdtm: Couldn't register jprobe\n"); + pr_info("Couldn't register jprobe\n"); cpoint = CN_INVALID; } @@ -709,8 +752,7 @@ static ssize_t direct_entry(struct file *f, const char __user *user_buf, if (type == CT_NONE) return -EINVAL; - printk(KERN_INFO "lkdtm: Performing direct entry %s\n", - cp_type_to_str(type)); + pr_info("Performing direct entry %s\n", cp_type_to_str(type)); lkdtm_do_action(type); *off += count; @@ -772,7 +814,7 @@ static int __init lkdtm_module_init(void) /* Register debugfs interface */ lkdtm_debugfs_root = debugfs_create_dir("provoke-crash", NULL); if (!lkdtm_debugfs_root) { - printk(KERN_ERR "lkdtm: creating root dir failed\n"); + pr_err("creating root dir failed\n"); return -ENODEV; } @@ -787,28 +829,26 @@ static int __init lkdtm_module_init(void) de = debugfs_create_file(cur->name, 0644, lkdtm_debugfs_root, NULL, &cur->fops); if (de == NULL) { - printk(KERN_ERR "lkdtm: could not create %s\n", - cur->name); + pr_err("could not create %s\n", cur->name); goto out_err; } } if (lkdtm_parse_commandline() == -EINVAL) { - printk(KERN_INFO "lkdtm: Invalid command\n"); + pr_info("Invalid command\n"); goto out_err; } if (cpoint != CN_INVALID && cptype != CT_NONE) { ret = lkdtm_register_cpoint(cpoint); if (ret < 0) { - printk(KERN_INFO "lkdtm: Invalid crash point %d\n", - cpoint); + pr_info("Invalid crash point %d\n", cpoint); goto out_err; } - printk(KERN_INFO "lkdtm: Crash point %s of type %s registered\n", - cpoint_name, cpoint_type); + pr_info("Crash point %s of type %s registered\n", + cpoint_name, cpoint_type); } else { - printk(KERN_INFO "lkdtm: No crash points registered, enable through debugfs\n"); + pr_info("No crash points registered, enable through debugfs\n"); } return 0; @@ -823,7 +863,7 @@ static void __exit lkdtm_module_exit(void) debugfs_remove_recursive(lkdtm_debugfs_root); unregister_jprobe(&lkdtm); - printk(KERN_INFO "lkdtm: Crash point unregistered\n"); + pr_info("Crash point unregistered\n"); } module_init(lkdtm_module_init); diff --git a/drivers/misc/mei/Kconfig b/drivers/misc/mei/Kconfig index c76fa31e9bf6..d23384dde73b 100644 --- a/drivers/misc/mei/Kconfig +++ b/drivers/misc/mei/Kconfig @@ -34,3 +34,12 @@ config INTEL_MEI_ME 82Q33 Express 82X38/X48 Express +config INTEL_MEI_TXE + tristate "Intel Trusted Execution Environment with ME Interface" + select INTEL_MEI + depends on X86 && PCI && WATCHDOG_CORE + help + MEI Support for Trusted Execution Environment device on Intel SoCs + + Supported SoCs: + Intel Bay Trail diff --git a/drivers/misc/mei/Makefile b/drivers/misc/mei/Makefile index 08698a466268..8ebc6cda1373 100644 --- a/drivers/misc/mei/Makefile +++ b/drivers/misc/mei/Makefile @@ -1,6 +1,6 @@ # # Makefile - Intel Management Engine Interface (Intel MEI) Linux driver -# Copyright (c) 2010-2011, Intel Corporation. +# Copyright (c) 2010-2014, Intel Corporation. # obj-$(CONFIG_INTEL_MEI) += mei.o mei-objs := init.o @@ -17,3 +17,7 @@ mei-$(CONFIG_DEBUG_FS) += debugfs.o obj-$(CONFIG_INTEL_MEI_ME) += mei-me.o mei-me-objs := pci-me.o mei-me-objs += hw-me.o + +obj-$(CONFIG_INTEL_MEI_TXE) += mei-txe.o +mei-txe-objs := pci-txe.o +mei-txe-objs += hw-txe.o diff --git a/drivers/misc/mei/amthif.c b/drivers/misc/mei/amthif.c index 2fad84432829..b8deb3455480 100644 --- a/drivers/misc/mei/amthif.c +++ b/drivers/misc/mei/amthif.c @@ -21,7 +21,6 @@ #include <linux/fcntl.h> #include <linux/aio.h> #include <linux/pci.h> -#include <linux/init.h> #include <linux/ioctl.h> #include <linux/cdev.h> #include <linux/list.h> @@ -35,7 +34,6 @@ #include "mei_dev.h" #include "hbm.h" -#include "hw-me.h" #include "client.h" const uuid_le mei_amthif_guid = UUID_LE(0x12f80028, 0xb4b7, 0x4b2d, @@ -79,10 +77,9 @@ int mei_amthif_host_init(struct mei_device *dev) i = mei_me_cl_by_uuid(dev, &mei_amthif_guid); if (i < 0) { - ret = i; dev_info(&dev->pdev->dev, - "amthif: failed to find the client %d\n", ret); - return ret; + "amthif: failed to find the client %d\n", i); + return -ENOTTY; } cl->me_client_id = dev->me_clients[i].client_id; @@ -116,14 +113,11 @@ int mei_amthif_host_init(struct mei_device *dev) cl->state = MEI_FILE_CONNECTING; - if (mei_hbm_cl_connect_req(dev, cl)) { - dev_dbg(&dev->pdev->dev, "amthif: Failed to connect to ME client\n"); - cl->state = MEI_FILE_DISCONNECTED; - cl->host_client_id = 0; - } else { - cl->timer_count = MEI_CONNECT_TIMEOUT; - } - return 0; + ret = mei_cl_connect(cl, NULL); + + dev->iamthif_state = MEI_IAMTHIF_IDLE; + + return ret; } /** @@ -137,14 +131,12 @@ int mei_amthif_host_init(struct mei_device *dev) struct mei_cl_cb *mei_amthif_find_read_list_entry(struct mei_device *dev, struct file *file) { - struct mei_cl_cb *pos = NULL; - struct mei_cl_cb *next = NULL; + struct mei_cl_cb *cb; - list_for_each_entry_safe(pos, next, - &dev->amthif_rd_complete_list.list, list) { - if (pos->cl && pos->cl == &dev->iamthif_cl && - pos->file_object == file) - return pos; + list_for_each_entry(cb, &dev->amthif_rd_complete_list.list, list) { + if (cb->cl && cb->cl == &dev->iamthif_cl && + cb->file_object == file) + return cb; } return NULL; } @@ -180,14 +172,13 @@ int mei_amthif_read(struct mei_device *dev, struct file *file, /* Only possible if we are in timeout */ if (!cl || cl != &dev->iamthif_cl) { dev_dbg(&dev->pdev->dev, "bad file ext.\n"); - return -ETIMEDOUT; + return -ETIME; } i = mei_me_cl_by_id(dev, dev->iamthif_cl.me_client_id); - if (i < 0) { dev_dbg(&dev->pdev->dev, "amthif client not found.\n"); - return -ENODEV; + return -ENOTTY; } dev_dbg(&dev->pdev->dev, "checking amthif data\n"); cb = mei_amthif_find_read_list_entry(dev, file); @@ -228,7 +219,7 @@ int mei_amthif_read(struct mei_device *dev, struct file *file, dev_dbg(&dev->pdev->dev, "amthif Time out\n"); /* 15 sec for the message has expired */ list_del(&cb->list); - rets = -ETIMEDOUT; + rets = -ETIME; goto free; } } @@ -253,9 +244,10 @@ int mei_amthif_read(struct mei_device *dev, struct file *file, * the buf_idx may point beyond */ length = min_t(size_t, length, (cb->buf_idx - *offset)); - if (copy_to_user(ubuf, cb->response_buffer.data + *offset, length)) + if (copy_to_user(ubuf, cb->response_buffer.data + *offset, length)) { + dev_dbg(&dev->pdev->dev, "failed to copy data to userland\n"); rets = -EFAULT; - else { + } else { rets = length; if ((*offset + length) < cb->buf_idx) { *offset += length; @@ -302,9 +294,8 @@ static int mei_amthif_send_cmd(struct mei_device *dev, struct mei_cl_cb *cb) if (ret < 0) return ret; - if (ret && dev->hbuf_is_ready) { + if (ret && mei_hbuf_acquire(dev)) { ret = 0; - dev->hbuf_is_ready = false; if (cb->request_buffer.size > mei_hbuf_max_len(dev)) { mei_hdr.length = mei_hbuf_max_len(dev); mei_hdr.msg_complete = 0; @@ -336,10 +327,6 @@ static int mei_amthif_send_cmd(struct mei_device *dev, struct mei_cl_cb *cb) list_add_tail(&cb->list, &dev->write_list.list); } } else { - if (!dev->hbuf_is_ready) - dev_dbg(&dev->pdev->dev, "host buffer is not empty"); - - dev_dbg(&dev->pdev->dev, "No flow control credentials, so add iamthif cb to write list.\n"); list_add_tail(&cb->list, &dev->write_list.list); } return 0; @@ -365,7 +352,7 @@ int mei_amthif_write(struct mei_device *dev, struct mei_cl_cb *cb) if (ret) return ret; - cb->fop_type = MEI_FOP_IOCTL; + cb->fop_type = MEI_FOP_WRITE; if (!list_empty(&dev->amthif_cmd_list.list) || dev->iamthif_state != MEI_IAMTHIF_IDLE) { @@ -447,23 +434,23 @@ unsigned int mei_amthif_poll(struct mei_device *dev, /** - * mei_amthif_irq_write_completed - processes completed iamthif operation. + * mei_amthif_irq_write - write iamthif command in irq thread context. * * @dev: the device structure. - * @slots: free slots. * @cb_pos: callback block. * @cl: private data of the file object. * @cmpl_list: complete list. * * returns 0, OK; otherwise, error. */ -int mei_amthif_irq_write_complete(struct mei_cl *cl, struct mei_cl_cb *cb, - s32 *slots, struct mei_cl_cb *cmpl_list) +int mei_amthif_irq_write(struct mei_cl *cl, struct mei_cl_cb *cb, + struct mei_cl_cb *cmpl_list) { struct mei_device *dev = cl->dev; struct mei_msg_hdr mei_hdr; size_t len = dev->iamthif_msg_buf_size - dev->iamthif_msg_buf_index; u32 msg_slots = mei_data2slots(len); + int slots; int rets; rets = mei_cl_flow_ctrl_creds(cl); @@ -480,13 +467,15 @@ int mei_amthif_irq_write_complete(struct mei_cl *cl, struct mei_cl_cb *cb, mei_hdr.reserved = 0; mei_hdr.internal = 0; - if (*slots >= msg_slots) { + slots = mei_hbuf_empty_slots(dev); + + if (slots >= msg_slots) { mei_hdr.length = len; mei_hdr.msg_complete = 1; /* Split the message only if we can write the whole host buffer */ - } else if (*slots == dev->hbuf_depth) { - msg_slots = *slots; - len = (*slots * sizeof(u32)) - sizeof(struct mei_msg_hdr); + } else if (slots == dev->hbuf_depth) { + msg_slots = slots; + len = (slots * sizeof(u32)) - sizeof(struct mei_msg_hdr); mei_hdr.length = len; mei_hdr.msg_complete = 0; } else { @@ -496,7 +485,6 @@ int mei_amthif_irq_write_complete(struct mei_cl *cl, struct mei_cl_cb *cb, dev_dbg(&dev->pdev->dev, MEI_HDR_FMT, MEI_HDR_PRM(&mei_hdr)); - *slots -= msg_slots; rets = mei_write_message(dev, &mei_hdr, dev->iamthif_msg_buf + dev->iamthif_msg_buf_index); if (rets) { diff --git a/drivers/misc/mei/bus.c b/drivers/misc/mei/bus.c index 4bc7d620d695..ddc5ac92a200 100644 --- a/drivers/misc/mei/bus.c +++ b/drivers/misc/mei/bus.c @@ -26,7 +26,6 @@ #include <linux/mei_cl_bus.h> #include "mei_dev.h" -#include "hw-me.h" #include "client.h" #define to_mei_cl_driver(d) container_of(d, struct mei_cl_driver, driver) @@ -145,9 +144,9 @@ static struct device_type mei_cl_device_type = { static struct mei_cl *mei_bus_find_mei_cl_by_uuid(struct mei_device *dev, uuid_le uuid) { - struct mei_cl *cl, *next; + struct mei_cl *cl; - list_for_each_entry_safe(cl, next, &dev->device_list, device_link) { + list_for_each_entry(cl, &dev->device_list, device_link) { if (!uuid_le_cmp(uuid, cl->device_uuid)) return cl; } @@ -524,6 +523,22 @@ void mei_cl_bus_rx_event(struct mei_cl *cl) schedule_work(&device->event_work); } +void mei_cl_bus_remove_devices(struct mei_device *dev) +{ + struct mei_cl *cl, *next; + + mutex_lock(&dev->device_lock); + list_for_each_entry_safe(cl, next, &dev->device_list, device_link) { + if (cl->device) + mei_cl_remove_device(cl->device); + + list_del(&cl->device_link); + mei_cl_unlink(cl); + kfree(cl); + } + mutex_unlock(&dev->device_lock); +} + int __init mei_cl_bus_init(void) { return bus_register(&mei_cl_bus_type); diff --git a/drivers/misc/mei/client.c b/drivers/misc/mei/client.c index 89a557972d1b..8c078b808cd3 100644 --- a/drivers/misc/mei/client.c +++ b/drivers/misc/mei/client.c @@ -29,20 +29,21 @@ * mei_me_cl_by_uuid - locate index of me client * * @dev: mei device + * + * Locking: called under "dev->device_lock" lock + * * returns me client index or -ENOENT if not found */ int mei_me_cl_by_uuid(const struct mei_device *dev, const uuid_le *uuid) { - int i, res = -ENOENT; + int i; for (i = 0; i < dev->me_clients_num; ++i) if (uuid_le_cmp(*uuid, - dev->me_clients[i].props.protocol_name) == 0) { - res = i; - break; - } + dev->me_clients[i].props.protocol_name) == 0) + return i; - return res; + return -ENOENT; } @@ -60,37 +61,79 @@ int mei_me_cl_by_uuid(const struct mei_device *dev, const uuid_le *uuid) int mei_me_cl_by_id(struct mei_device *dev, u8 client_id) { int i; + for (i = 0; i < dev->me_clients_num; i++) if (dev->me_clients[i].client_id == client_id) - break; - if (WARN_ON(dev->me_clients[i].client_id != client_id)) - return -ENOENT; + return i; - if (i == dev->me_clients_num) - return -ENOENT; - - return i; + return -ENOENT; } /** - * mei_io_list_flush - removes list entry belonging to cl. + * mei_cl_cmp_id - tells if the clients are the same * - * @list: An instance of our list structure - * @cl: host client + * @cl1: host client 1 + * @cl2: host client 2 + * + * returns true - if the clients has same host and me ids + * false - otherwise + */ +static inline bool mei_cl_cmp_id(const struct mei_cl *cl1, + const struct mei_cl *cl2) +{ + return cl1 && cl2 && + (cl1->host_client_id == cl2->host_client_id) && + (cl1->me_client_id == cl2->me_client_id); +} + +/** + * mei_io_list_flush - removes cbs belonging to cl. + * + * @list: an instance of our list structure + * @cl: host client, can be NULL for flushing the whole list + * @free: whether to free the cbs */ -void mei_io_list_flush(struct mei_cl_cb *list, struct mei_cl *cl) +static void __mei_io_list_flush(struct mei_cl_cb *list, + struct mei_cl *cl, bool free) { struct mei_cl_cb *cb; struct mei_cl_cb *next; + /* enable removing everything if no cl is specified */ list_for_each_entry_safe(cb, next, &list->list, list) { - if (cb->cl && mei_cl_cmp_id(cl, cb->cl)) + if (!cl || (cb->cl && mei_cl_cmp_id(cl, cb->cl))) { list_del(&cb->list); + if (free) + mei_io_cb_free(cb); + } } } /** + * mei_io_list_flush - removes list entry belonging to cl. + * + * @list: An instance of our list structure + * @cl: host client + */ +static inline void mei_io_list_flush(struct mei_cl_cb *list, struct mei_cl *cl) +{ + __mei_io_list_flush(list, cl, false); +} + + +/** + * mei_io_list_free - removes cb belonging to cl and free them + * + * @list: An instance of our list structure + * @cl: host client + */ +static inline void mei_io_list_free(struct mei_cl_cb *list, struct mei_cl *cl) +{ + __mei_io_list_flush(list, cl, true); +} + +/** * mei_io_cb_free - free mei_cb_private related memory * * @cb: mei callback struct @@ -196,8 +239,8 @@ int mei_cl_flush_queues(struct mei_cl *cl) cl_dbg(dev, cl, "remove list entry belonging to cl\n"); mei_io_list_flush(&cl->dev->read_list, cl); - mei_io_list_flush(&cl->dev->write_list, cl); - mei_io_list_flush(&cl->dev->write_waiting_list, cl); + mei_io_list_free(&cl->dev->write_list, cl); + mei_io_list_free(&cl->dev->write_waiting_list, cl); mei_io_list_flush(&cl->dev->ctrl_wr_list, cl); mei_io_list_flush(&cl->dev->ctrl_rd_list, cl); mei_io_list_flush(&cl->dev->amthif_cmd_list, cl); @@ -254,10 +297,9 @@ struct mei_cl *mei_cl_allocate(struct mei_device *dev) struct mei_cl_cb *mei_cl_find_read_cb(struct mei_cl *cl) { struct mei_device *dev = cl->dev; - struct mei_cl_cb *cb = NULL; - struct mei_cl_cb *next = NULL; + struct mei_cl_cb *cb; - list_for_each_entry_safe(cb, next, &dev->read_list.list, list) + list_for_each_entry(cb, &dev->read_list.list, list) if (mei_cl_cmp_id(cl, cb->cl)) return cb; return NULL; @@ -375,6 +417,23 @@ void mei_host_client_init(struct work_struct *work) mutex_unlock(&dev->device_lock); } +/** + * mei_hbuf_acquire: try to acquire host buffer + * + * @dev: the device structure + * returns true if host buffer was acquired + */ +bool mei_hbuf_acquire(struct mei_device *dev) +{ + if (!dev->hbuf_is_ready) { + dev_dbg(&dev->pdev->dev, "hbuf is not ready\n"); + return false; + } + + dev->hbuf_is_ready = false; + + return true; +} /** * mei_cl_disconnect - disconnect host client from the me one @@ -406,8 +465,7 @@ int mei_cl_disconnect(struct mei_cl *cl) return -ENOMEM; cb->fop_type = MEI_FOP_CLOSE; - if (dev->hbuf_is_ready) { - dev->hbuf_is_ready = false; + if (mei_hbuf_acquire(dev)) { if (mei_hbm_cl_disconnect_req(dev, cl)) { rets = -ENODEV; cl_err(dev, cl, "failed to disconnect.\n"); @@ -461,17 +519,17 @@ free: bool mei_cl_is_other_connecting(struct mei_cl *cl) { struct mei_device *dev; - struct mei_cl *pos; - struct mei_cl *next; + struct mei_cl *ocl; /* the other client */ if (WARN_ON(!cl || !cl->dev)) return false; dev = cl->dev; - list_for_each_entry_safe(pos, next, &dev->file_list, link) { - if ((pos->state == MEI_FILE_CONNECTING) && - (pos != cl) && cl->me_client_id == pos->me_client_id) + list_for_each_entry(ocl, &dev->file_list, link) { + if (ocl->state == MEI_FILE_CONNECTING && + ocl != cl && + cl->me_client_id == ocl->me_client_id) return true; } @@ -505,11 +563,10 @@ int mei_cl_connect(struct mei_cl *cl, struct file *file) goto out; } - cb->fop_type = MEI_FOP_IOCTL; - - if (dev->hbuf_is_ready && !mei_cl_is_other_connecting(cl)) { - dev->hbuf_is_ready = false; + cb->fop_type = MEI_FOP_CONNECT; + /* run hbuf acquire last so we don't have to undo */ + if (!mei_cl_is_other_connecting(cl) && mei_hbuf_acquire(dev)) { if (mei_hbm_cl_connect_req(dev, cl)) { rets = -ENODEV; goto out; @@ -521,18 +578,19 @@ int mei_cl_connect(struct mei_cl *cl, struct file *file) } mutex_unlock(&dev->device_lock); - rets = wait_event_timeout(dev->wait_recvd_msg, - (cl->state == MEI_FILE_CONNECTED || - cl->state == MEI_FILE_DISCONNECTED), - mei_secs_to_jiffies(MEI_CL_CONNECT_TIMEOUT)); + wait_event_timeout(dev->wait_recvd_msg, + (cl->state == MEI_FILE_CONNECTED || + cl->state == MEI_FILE_DISCONNECTED), + mei_secs_to_jiffies(MEI_CL_CONNECT_TIMEOUT)); mutex_lock(&dev->device_lock); if (cl->state != MEI_FILE_CONNECTED) { - rets = -EFAULT; + /* something went really wrong */ + if (!cl->status) + cl->status = -EFAULT; mei_io_list_flush(&dev->ctrl_rd_list, cl); mei_io_list_flush(&dev->ctrl_wr_list, cl); - goto out; } rets = cl->status; @@ -554,7 +612,8 @@ out: int mei_cl_flow_ctrl_creds(struct mei_cl *cl) { struct mei_device *dev; - int i; + struct mei_me_client *me_cl; + int id; if (WARN_ON(!cl || !cl->dev)) return -EINVAL; @@ -567,19 +626,19 @@ int mei_cl_flow_ctrl_creds(struct mei_cl *cl) if (cl->mei_flow_ctrl_creds > 0) return 1; - for (i = 0; i < dev->me_clients_num; i++) { - struct mei_me_client *me_cl = &dev->me_clients[i]; - if (me_cl->client_id == cl->me_client_id) { - if (me_cl->mei_flow_ctrl_creds) { - if (WARN_ON(me_cl->props.single_recv_buf == 0)) - return -EINVAL; - return 1; - } else { - return 0; - } - } + id = mei_me_cl_by_id(dev, cl->me_client_id); + if (id < 0) { + cl_err(dev, cl, "no such me client %d\n", cl->me_client_id); + return id; } - return -ENOENT; + + me_cl = &dev->me_clients[id]; + if (me_cl->mei_flow_ctrl_creds) { + if (WARN_ON(me_cl->props.single_recv_buf == 0)) + return -EINVAL; + return 1; + } + return 0; } /** @@ -595,32 +654,31 @@ int mei_cl_flow_ctrl_creds(struct mei_cl *cl) int mei_cl_flow_ctrl_reduce(struct mei_cl *cl) { struct mei_device *dev; - int i; + struct mei_me_client *me_cl; + int id; if (WARN_ON(!cl || !cl->dev)) return -EINVAL; dev = cl->dev; - if (!dev->me_clients_num) - return -ENOENT; + id = mei_me_cl_by_id(dev, cl->me_client_id); + if (id < 0) { + cl_err(dev, cl, "no such me client %d\n", cl->me_client_id); + return id; + } - for (i = 0; i < dev->me_clients_num; i++) { - struct mei_me_client *me_cl = &dev->me_clients[i]; - if (me_cl->client_id == cl->me_client_id) { - if (me_cl->props.single_recv_buf != 0) { - if (WARN_ON(me_cl->mei_flow_ctrl_creds <= 0)) - return -EINVAL; - dev->me_clients[i].mei_flow_ctrl_creds--; - } else { - if (WARN_ON(cl->mei_flow_ctrl_creds <= 0)) - return -EINVAL; - cl->mei_flow_ctrl_creds--; - } - return 0; - } + me_cl = &dev->me_clients[id]; + if (me_cl->props.single_recv_buf != 0) { + if (WARN_ON(me_cl->mei_flow_ctrl_creds <= 0)) + return -EINVAL; + me_cl->mei_flow_ctrl_creds--; + } else { + if (WARN_ON(cl->mei_flow_ctrl_creds <= 0)) + return -EINVAL; + cl->mei_flow_ctrl_creds--; } - return -ENOENT; + return 0; } /** @@ -652,7 +710,7 @@ int mei_cl_read_start(struct mei_cl *cl, size_t length) i = mei_me_cl_by_id(dev, cl->me_client_id); if (i < 0) { cl_err(dev, cl, "no such me client %d\n", cl->me_client_id); - return -ENODEV; + return -ENOTTY; } cb = mei_io_cb_init(cl, NULL); @@ -666,8 +724,7 @@ int mei_cl_read_start(struct mei_cl *cl, size_t length) goto err; cb->fop_type = MEI_FOP_READ; - if (dev->hbuf_is_ready) { - dev->hbuf_is_ready = false; + if (mei_hbuf_acquire(dev)) { if (mei_hbm_cl_flow_control_req(dev, cl)) { cl_err(dev, cl, "flow control send failed\n"); rets = -ENODEV; @@ -687,27 +744,26 @@ err: } /** - * mei_cl_irq_write_complete - write a message to device + * mei_cl_irq_write - write a message to device * from the interrupt thread context * * @cl: client * @cb: callback block. - * @slots: free slots. * @cmpl_list: complete list. * * returns 0, OK; otherwise error. */ -int mei_cl_irq_write_complete(struct mei_cl *cl, struct mei_cl_cb *cb, - s32 *slots, struct mei_cl_cb *cmpl_list) +int mei_cl_irq_write(struct mei_cl *cl, struct mei_cl_cb *cb, + struct mei_cl_cb *cmpl_list) { struct mei_device *dev; struct mei_msg_data *buf; struct mei_msg_hdr mei_hdr; size_t len; u32 msg_slots; + int slots; int rets; - if (WARN_ON(!cl || !cl->dev)) return -ENODEV; @@ -724,6 +780,7 @@ int mei_cl_irq_write_complete(struct mei_cl *cl, struct mei_cl_cb *cb, return 0; } + slots = mei_hbuf_empty_slots(dev); len = buf->size - cb->buf_idx; msg_slots = mei_data2slots(len); @@ -732,13 +789,13 @@ int mei_cl_irq_write_complete(struct mei_cl *cl, struct mei_cl_cb *cb, mei_hdr.reserved = 0; mei_hdr.internal = cb->internal; - if (*slots >= msg_slots) { + if (slots >= msg_slots) { mei_hdr.length = len; mei_hdr.msg_complete = 1; /* Split the message only if we can write the whole host buffer */ - } else if (*slots == dev->hbuf_depth) { - msg_slots = *slots; - len = (*slots * sizeof(u32)) - sizeof(struct mei_msg_hdr); + } else if (slots == dev->hbuf_depth) { + msg_slots = slots; + len = (slots * sizeof(u32)) - sizeof(struct mei_msg_hdr); mei_hdr.length = len; mei_hdr.msg_complete = 0; } else { @@ -749,7 +806,6 @@ int mei_cl_irq_write_complete(struct mei_cl *cl, struct mei_cl_cb *cb, cl_dbg(dev, cl, "buf: size = %d idx = %lu\n", cb->request_buffer.size, cb->buf_idx); - *slots -= msg_slots; rets = mei_write_message(dev, &mei_hdr, buf->data + cb->buf_idx); if (rets) { cl->status = rets; @@ -802,21 +858,29 @@ int mei_cl_write(struct mei_cl *cl, struct mei_cl_cb *cb, bool blocking) cb->fop_type = MEI_FOP_WRITE; + cb->buf_idx = 0; + cl->writing_state = MEI_IDLE; + + mei_hdr.host_addr = cl->host_client_id; + mei_hdr.me_addr = cl->me_client_id; + mei_hdr.reserved = 0; + mei_hdr.msg_complete = 0; + mei_hdr.internal = cb->internal; rets = mei_cl_flow_ctrl_creds(cl); if (rets < 0) goto err; - /* Host buffer is not ready, we queue the request */ - if (rets == 0 || !dev->hbuf_is_ready) { - cb->buf_idx = 0; - /* unseting complete will enqueue the cb for write */ - mei_hdr.msg_complete = 0; + if (rets == 0) { + cl_dbg(dev, cl, "No flow control credentials: not sending.\n"); + rets = buf->size; + goto out; + } + if (!mei_hbuf_acquire(dev)) { + cl_dbg(dev, cl, "Cannot acquire the host buffer: not sending.\n"); rets = buf->size; goto out; } - - dev->hbuf_is_ready = false; /* Check for a maximum length */ if (buf->size > mei_hbuf_max_len(dev)) { @@ -827,12 +891,6 @@ int mei_cl_write(struct mei_cl *cl, struct mei_cl_cb *cb, bool blocking) mei_hdr.msg_complete = 1; } - mei_hdr.host_addr = cl->host_client_id; - mei_hdr.me_addr = cl->me_client_id; - mei_hdr.reserved = 0; - mei_hdr.internal = cb->internal; - - rets = mei_write_message(dev, &mei_hdr, buf->data); if (rets) goto err; @@ -840,13 +898,12 @@ int mei_cl_write(struct mei_cl *cl, struct mei_cl_cb *cb, bool blocking) cl->writing_state = MEI_WRITING; cb->buf_idx = mei_hdr.length; - rets = buf->size; out: if (mei_hdr.msg_complete) { - if (mei_cl_flow_ctrl_reduce(cl)) { - rets = -ENODEV; + rets = mei_cl_flow_ctrl_reduce(cl); + if (rets < 0) goto err; - } + list_add_tail(&cb->list, &dev->write_waiting_list.list); } else { list_add_tail(&cb->list, &dev->write_list.list); @@ -856,15 +913,18 @@ out: if (blocking && cl->writing_state != MEI_WRITE_COMPLETE) { mutex_unlock(&dev->device_lock); - if (wait_event_interruptible(cl->tx_wait, - cl->writing_state == MEI_WRITE_COMPLETE)) { - if (signal_pending(current)) - rets = -EINTR; - else - rets = -ERESTARTSYS; - } + rets = wait_event_interruptible(cl->tx_wait, + cl->writing_state == MEI_WRITE_COMPLETE); mutex_lock(&dev->device_lock); + /* wait_event_interruptible returns -ERESTARTSYS */ + if (rets) { + if (signal_pending(current)) + rets = -EINTR; + goto err; + } } + + rets = buf->size; err: return rets; } @@ -905,9 +965,9 @@ void mei_cl_complete(struct mei_cl *cl, struct mei_cl_cb *cb) void mei_cl_all_disconnect(struct mei_device *dev) { - struct mei_cl *cl, *next; + struct mei_cl *cl; - list_for_each_entry_safe(cl, next, &dev->file_list, link) { + list_for_each_entry(cl, &dev->file_list, link) { cl->state = MEI_FILE_DISCONNECTED; cl->mei_flow_ctrl_creds = 0; cl->timer_count = 0; @@ -922,8 +982,8 @@ void mei_cl_all_disconnect(struct mei_device *dev) */ void mei_cl_all_wakeup(struct mei_device *dev) { - struct mei_cl *cl, *next; - list_for_each_entry_safe(cl, next, &dev->file_list, link) { + struct mei_cl *cl; + list_for_each_entry(cl, &dev->file_list, link) { if (waitqueue_active(&cl->rx_wait)) { cl_dbg(dev, cl, "Waking up reading client!\n"); wake_up_interruptible(&cl->rx_wait); @@ -942,20 +1002,8 @@ void mei_cl_all_wakeup(struct mei_device *dev) */ void mei_cl_all_write_clear(struct mei_device *dev) { - struct mei_cl_cb *cb, *next; - struct list_head *list; - - list = &dev->write_list.list; - list_for_each_entry_safe(cb, next, list, list) { - list_del(&cb->list); - mei_io_cb_free(cb); - } - - list = &dev->write_waiting_list.list; - list_for_each_entry_safe(cb, next, list, list) { - list_del(&cb->list); - mei_io_cb_free(cb); - } + mei_io_list_free(&dev->write_list, NULL); + mei_io_list_free(&dev->write_waiting_list, NULL); } diff --git a/drivers/misc/mei/client.h b/drivers/misc/mei/client.h index c8396e582f1c..96d5de0389f9 100644 --- a/drivers/misc/mei/client.h +++ b/drivers/misc/mei/client.h @@ -45,8 +45,6 @@ static inline void mei_io_list_init(struct mei_cl_cb *list) { INIT_LIST_HEAD(&list->list); } -void mei_io_list_flush(struct mei_cl_cb *list, struct mei_cl *cl); - /* * MEI Host Client Functions */ @@ -61,22 +59,6 @@ int mei_cl_unlink(struct mei_cl *cl); int mei_cl_flush_queues(struct mei_cl *cl); struct mei_cl_cb *mei_cl_find_read_cb(struct mei_cl *cl); -/** - * mei_cl_cmp_id - tells if file private data have same id - * - * @fe1: private data of 1. file object - * @fe2: private data of 2. file object - * - * returns true - if ids are the same and not NULL - */ -static inline bool mei_cl_cmp_id(const struct mei_cl *cl1, - const struct mei_cl *cl2) -{ - return cl1 && cl2 && - (cl1->host_client_id == cl2->host_client_id) && - (cl1->me_client_id == cl2->me_client_id); -} - int mei_cl_flow_ctrl_creds(struct mei_cl *cl); @@ -86,15 +68,15 @@ int mei_cl_flow_ctrl_reduce(struct mei_cl *cl); */ static inline bool mei_cl_is_connected(struct mei_cl *cl) { - return (cl->dev && + return cl->dev && cl->dev->dev_state == MEI_DEV_ENABLED && - cl->state == MEI_FILE_CONNECTED); + cl->state == MEI_FILE_CONNECTED; } static inline bool mei_cl_is_transitioning(struct mei_cl *cl) { - return (MEI_FILE_INITIALIZING == cl->state || + return MEI_FILE_INITIALIZING == cl->state || MEI_FILE_DISCONNECTED == cl->state || - MEI_FILE_DISCONNECTING == cl->state); + MEI_FILE_DISCONNECTING == cl->state; } bool mei_cl_is_other_connecting(struct mei_cl *cl); @@ -102,8 +84,8 @@ int mei_cl_disconnect(struct mei_cl *cl); int mei_cl_connect(struct mei_cl *cl, struct file *file); int mei_cl_read_start(struct mei_cl *cl, size_t length); int mei_cl_write(struct mei_cl *cl, struct mei_cl_cb *cb, bool blocking); -int mei_cl_irq_write_complete(struct mei_cl *cl, struct mei_cl_cb *cb, - s32 *slots, struct mei_cl_cb *cmpl_list); +int mei_cl_irq_write(struct mei_cl *cl, struct mei_cl_cb *cb, + struct mei_cl_cb *cmpl_list); void mei_cl_complete(struct mei_cl *cl, struct mei_cl_cb *cb); diff --git a/drivers/misc/mei/debugfs.c b/drivers/misc/mei/debugfs.c index a3ae154444b2..ced5b777c70f 100644 --- a/drivers/misc/mei/debugfs.c +++ b/drivers/misc/mei/debugfs.c @@ -75,6 +75,54 @@ static const struct file_operations mei_dbgfs_fops_meclients = { .llseek = generic_file_llseek, }; +static ssize_t mei_dbgfs_read_active(struct file *fp, char __user *ubuf, + size_t cnt, loff_t *ppos) +{ + struct mei_device *dev = fp->private_data; + struct mei_cl *cl; + const size_t bufsz = 1024; + char *buf; + int i = 0; + int pos = 0; + int ret; + + if (!dev) + return -ENODEV; + + buf = kzalloc(bufsz, GFP_KERNEL); + if (!buf) + return -ENOMEM; + + pos += scnprintf(buf + pos, bufsz - pos, + " |me|host|state|rd|wr|\n"); + + mutex_lock(&dev->device_lock); + + /* if the driver is not enabled the list won't b consitent */ + if (dev->dev_state != MEI_DEV_ENABLED) + goto out; + + list_for_each_entry(cl, &dev->file_list, link) { + + pos += scnprintf(buf + pos, bufsz - pos, + "%2d|%2d|%4d|%5d|%2d|%2d|\n", + i, cl->me_client_id, cl->host_client_id, cl->state, + cl->reading_state, cl->writing_state); + i++; + } +out: + mutex_unlock(&dev->device_lock); + ret = simple_read_from_buffer(ubuf, cnt, ppos, buf, pos); + kfree(buf); + return ret; +} + +static const struct file_operations mei_dbgfs_fops_active = { + .open = simple_open, + .read = mei_dbgfs_read_active, + .llseek = generic_file_llseek, +}; + static ssize_t mei_dbgfs_read_devstate(struct file *fp, char __user *ubuf, size_t cnt, loff_t *ppos) { @@ -128,6 +176,12 @@ int mei_dbgfs_register(struct mei_device *dev, const char *name) dev_err(&dev->pdev->dev, "meclients: registration failed\n"); goto err; } + f = debugfs_create_file("active", S_IRUSR, dir, + dev, &mei_dbgfs_fops_active); + if (!f) { + dev_err(&dev->pdev->dev, "meclients: registration failed\n"); + goto err; + } f = debugfs_create_file("devstate", S_IRUSR, dir, dev, &mei_dbgfs_fops_devstate); if (!f) { diff --git a/drivers/misc/mei/hbm.c b/drivers/misc/mei/hbm.c index 28cd74c073b9..4960288e543a 100644 --- a/drivers/misc/mei/hbm.c +++ b/drivers/misc/mei/hbm.c @@ -21,7 +21,41 @@ #include "mei_dev.h" #include "hbm.h" -#include "hw-me.h" +#include "client.h" + +static const char *mei_cl_conn_status_str(enum mei_cl_connect_status status) +{ +#define MEI_CL_CS(status) case MEI_CL_CONN_##status: return #status + switch (status) { + MEI_CL_CS(SUCCESS); + MEI_CL_CS(NOT_FOUND); + MEI_CL_CS(ALREADY_STARTED); + MEI_CL_CS(OUT_OF_RESOURCES); + MEI_CL_CS(MESSAGE_SMALL); + default: return "unknown"; + } +#undef MEI_CL_CCS +} + +/** + * mei_cl_conn_status_to_errno - convert client connect response + * status to error code + * + * @status: client connect response status + * + * returns corresponding error code + */ +static int mei_cl_conn_status_to_errno(enum mei_cl_connect_status status) +{ + switch (status) { + case MEI_CL_CONN_SUCCESS: return 0; + case MEI_CL_CONN_NOT_FOUND: return -ENOTTY; + case MEI_CL_CONN_ALREADY_STARTED: return -EBUSY; + case MEI_CL_CONN_OUT_OF_RESOURCES: return -EBUSY; + case MEI_CL_CONN_MESSAGE_SMALL: return -EINVAL; + default: return -EINVAL; + } +} /** * mei_hbm_me_cl_allocate - allocates storage for me clients @@ -100,33 +134,6 @@ bool mei_hbm_cl_addr_equal(struct mei_cl *cl, void *buf) /** - * is_treat_specially_client - checks if the message belongs - * to the file private data. - * - * @cl: private data of the file object - * @rs: connect response bus message - * - */ -static bool is_treat_specially_client(struct mei_cl *cl, - struct hbm_client_connect_response *rs) -{ - if (mei_hbm_cl_addr_equal(cl, rs)) { - if (!rs->status) { - cl->state = MEI_FILE_CONNECTED; - cl->status = 0; - - } else { - cl->state = MEI_FILE_DISCONNECTED; - cl->status = -ENODEV; - } - cl->timer_count = 0; - - return true; - } - return false; -} - -/** * mei_hbm_idle - set hbm to idle state * * @dev: the device structure @@ -147,13 +154,13 @@ int mei_hbm_start_wait(struct mei_device *dev) ret = wait_event_interruptible_timeout(dev->wait_recvd_msg, dev->hbm_state == MEI_HBM_IDLE || dev->hbm_state >= MEI_HBM_STARTED, - mei_secs_to_jiffies(MEI_INTEROP_TIMEOUT)); + mei_secs_to_jiffies(MEI_HBM_TIMEOUT)); mutex_lock(&dev->device_lock); if (ret <= 0 && (dev->hbm_state <= MEI_HBM_START)) { dev->hbm_state = MEI_HBM_IDLE; dev_err(&dev->pdev->dev, "waiting for mei start failed\n"); - return -ETIMEDOUT; + return -ETIME; } return 0; } @@ -283,17 +290,18 @@ static int mei_hbm_prop_req(struct mei_device *dev) } /** - * mei_hbm_stop_req_prepare - prepare stop request message + * mei_hbm_stop_req - send stop request message * * @dev - mei device - * @mei_hdr - mei message header - * @data - hbm message body buffer + * @cl: client info + * + * This function returns -EIO on write failure */ -static void mei_hbm_stop_req_prepare(struct mei_device *dev, - struct mei_msg_hdr *mei_hdr, unsigned char *data) +static int mei_hbm_stop_req(struct mei_device *dev) { + struct mei_msg_hdr *mei_hdr = &dev->wr_msg.hdr; struct hbm_host_stop_request *req = - (struct hbm_host_stop_request *)data; + (struct hbm_host_stop_request *)dev->wr_msg.data; const size_t len = sizeof(struct hbm_host_stop_request); mei_hbm_hdr(mei_hdr, len); @@ -301,6 +309,8 @@ static void mei_hbm_stop_req_prepare(struct mei_device *dev, memset(req, 0, len); req->hbm_cmd = HOST_STOP_REQ_CMD; req->reason = DRIVER_STOP_REQUEST; + + return mei_write_message(dev, mei_hdr, dev->wr_msg.data); } /** @@ -319,8 +329,7 @@ int mei_hbm_cl_flow_control_req(struct mei_device *dev, struct mei_cl *cl) mei_hbm_hdr(mei_hdr, len); mei_hbm_cl_hdr(cl, MEI_FLOW_CONTROL_CMD, dev->wr_msg.data, len); - dev_dbg(&dev->pdev->dev, "sending flow control host client = %d, ME client = %d\n", - cl->host_client_id, cl->me_client_id); + cl_dbg(dev, cl, "sending flow control\n"); return mei_write_message(dev, mei_hdr, dev->wr_msg.data); } @@ -330,27 +339,34 @@ int mei_hbm_cl_flow_control_req(struct mei_device *dev, struct mei_cl *cl) * * @dev: the device structure * @flow: flow control. + * + * return 0 on success, < 0 otherwise */ -static void mei_hbm_add_single_flow_creds(struct mei_device *dev, +static int mei_hbm_add_single_flow_creds(struct mei_device *dev, struct hbm_flow_control *flow) { - struct mei_me_client *client; - int i; - - for (i = 0; i < dev->me_clients_num; i++) { - client = &dev->me_clients[i]; - if (client && flow->me_addr == client->client_id) { - if (client->props.single_recv_buf) { - client->mei_flow_ctrl_creds++; - dev_dbg(&dev->pdev->dev, "recv flow ctrl msg ME %d (single).\n", - flow->me_addr); - dev_dbg(&dev->pdev->dev, "flow control credentials =%d.\n", - client->mei_flow_ctrl_creds); - } else { - BUG(); /* error in flow control */ - } - } + struct mei_me_client *me_cl; + int id; + + id = mei_me_cl_by_id(dev, flow->me_addr); + if (id < 0) { + dev_err(&dev->pdev->dev, "no such me client %d\n", + flow->me_addr); + return id; } + + me_cl = &dev->me_clients[id]; + if (me_cl->props.single_recv_buf) { + me_cl->mei_flow_ctrl_creds++; + dev_dbg(&dev->pdev->dev, "recv flow ctrl msg ME %d (single).\n", + flow->me_addr); + dev_dbg(&dev->pdev->dev, "flow control credentials =%d.\n", + me_cl->mei_flow_ctrl_creds); + } else { + BUG(); /* error in flow control */ + } + + return 0; } /** @@ -362,8 +378,7 @@ static void mei_hbm_add_single_flow_creds(struct mei_device *dev, static void mei_hbm_cl_flow_control_res(struct mei_device *dev, struct hbm_flow_control *flow_control) { - struct mei_cl *cl = NULL; - struct mei_cl *next = NULL; + struct mei_cl *cl; if (!flow_control->host_addr) { /* single receive buffer */ @@ -372,7 +387,7 @@ static void mei_hbm_cl_flow_control_res(struct mei_device *dev, } /* normal connection */ - list_for_each_entry_safe(cl, next, &dev->file_list, link) { + list_for_each_entry(cl, &dev->file_list, link) { if (mei_hbm_cl_addr_equal(cl, flow_control)) { cl->mei_flow_ctrl_creds++; dev_dbg(&dev->pdev->dev, "flow ctrl msg for host %d ME %d.\n", @@ -405,6 +420,25 @@ int mei_hbm_cl_disconnect_req(struct mei_device *dev, struct mei_cl *cl) } /** + * mei_hbm_cl_disconnect_rsp - sends disconnect respose to the FW + * + * @dev: the device structure + * @cl: a client to disconnect from + * + * This function returns -EIO on write failure + */ +int mei_hbm_cl_disconnect_rsp(struct mei_device *dev, struct mei_cl *cl) +{ + struct mei_msg_hdr *mei_hdr = &dev->wr_msg.hdr; + const size_t len = sizeof(struct hbm_client_connect_response); + + mei_hbm_hdr(mei_hdr, len); + mei_hbm_cl_hdr(cl, CLIENT_DISCONNECT_RES_CMD, dev->wr_msg.data, len); + + return mei_write_message(dev, mei_hdr, dev->wr_msg.data); +} + +/** * mei_hbm_cl_disconnect_res - disconnect response from ME * * @dev: the device structure @@ -414,29 +448,23 @@ static void mei_hbm_cl_disconnect_res(struct mei_device *dev, struct hbm_client_connect_response *rs) { struct mei_cl *cl; - struct mei_cl_cb *pos = NULL, *next = NULL; - - dev_dbg(&dev->pdev->dev, - "disconnect_response:\n" - "ME Client = %d\n" - "Host Client = %d\n" - "Status = %d\n", - rs->me_addr, - rs->host_addr, - rs->status); - - list_for_each_entry_safe(pos, next, &dev->ctrl_rd_list.list, list) { - cl = pos->cl; - - if (!cl) { - list_del(&pos->list); + struct mei_cl_cb *cb, *next; + + dev_dbg(&dev->pdev->dev, "hbm: disconnect response cl:host=%02d me=%02d status=%d\n", + rs->me_addr, rs->host_addr, rs->status); + + list_for_each_entry_safe(cb, next, &dev->ctrl_rd_list.list, list) { + cl = cb->cl; + + /* this should not happen */ + if (WARN_ON(!cl)) { + list_del(&cb->list); return; } - dev_dbg(&dev->pdev->dev, "list_for_each_entry_safe in ctrl_rd_list.\n"); if (mei_hbm_cl_addr_equal(cl, rs)) { - list_del(&pos->list); - if (!rs->status) + list_del(&cb->list); + if (rs->status == MEI_CL_DISCONN_SUCCESS) cl->state = MEI_FILE_DISCONNECTED; cl->status = 0; @@ -476,46 +504,41 @@ static void mei_hbm_cl_connect_res(struct mei_device *dev, { struct mei_cl *cl; - struct mei_cl_cb *pos = NULL, *next = NULL; + struct mei_cl_cb *cb, *next; - dev_dbg(&dev->pdev->dev, - "connect_response:\n" - "ME Client = %d\n" - "Host Client = %d\n" - "Status = %d\n", - rs->me_addr, - rs->host_addr, - rs->status); + dev_dbg(&dev->pdev->dev, "hbm: connect response cl:host=%02d me=%02d status=%s\n", + rs->me_addr, rs->host_addr, + mei_cl_conn_status_str(rs->status)); - /* if WD or iamthif client treat specially */ + cl = NULL; - if (is_treat_specially_client(&dev->wd_cl, rs)) { - dev_dbg(&dev->pdev->dev, "successfully connected to WD client.\n"); - mei_watchdog_register(dev); + list_for_each_entry_safe(cb, next, &dev->ctrl_rd_list.list, list) { - return; - } + cl = cb->cl; + /* this should not happen */ + if (WARN_ON(!cl)) { + list_del_init(&cb->list); + continue; + } - if (is_treat_specially_client(&dev->iamthif_cl, rs)) { - dev->iamthif_state = MEI_IAMTHIF_IDLE; - return; - } - list_for_each_entry_safe(pos, next, &dev->ctrl_rd_list.list, list) { + if (cb->fop_type != MEI_FOP_CONNECT) + continue; - cl = pos->cl; - if (!cl) { - list_del(&pos->list); - return; - } - if (pos->fop_type == MEI_FOP_IOCTL) { - if (is_treat_specially_client(cl, rs)) { - list_del(&pos->list); - cl->status = 0; - cl->timer_count = 0; - break; - } + if (mei_hbm_cl_addr_equal(cl, rs)) { + list_del(&cb->list); + break; } } + + if (!cl) + return; + + cl->timer_count = 0; + if (rs->status == MEI_CL_CONN_SUCCESS) + cl->state = MEI_FILE_CONNECTED; + else + cl->state = MEI_FILE_DISCONNECTED; + cl->status = mei_cl_conn_status_to_errno(rs->status); } @@ -525,32 +548,34 @@ static void mei_hbm_cl_connect_res(struct mei_device *dev, * * @dev: the device structure. * @disconnect_req: disconnect request bus message from the me + * + * returns -ENOMEM on allocation failure */ -static void mei_hbm_fw_disconnect_req(struct mei_device *dev, +static int mei_hbm_fw_disconnect_req(struct mei_device *dev, struct hbm_client_connect_request *disconnect_req) { - struct mei_cl *cl, *next; - const size_t len = sizeof(struct hbm_client_connect_response); + struct mei_cl *cl; + struct mei_cl_cb *cb; - list_for_each_entry_safe(cl, next, &dev->file_list, link) { + list_for_each_entry(cl, &dev->file_list, link) { if (mei_hbm_cl_addr_equal(cl, disconnect_req)) { dev_dbg(&dev->pdev->dev, "disconnect request host client %d ME client %d.\n", disconnect_req->host_addr, disconnect_req->me_addr); cl->state = MEI_FILE_DISCONNECTED; cl->timer_count = 0; - if (cl == &dev->wd_cl) - dev->wd_pending = false; - else if (cl == &dev->iamthif_cl) - dev->iamthif_timer = 0; - - /* prepare disconnect response */ - mei_hbm_hdr(&dev->wr_ext_msg.hdr, len); - mei_hbm_cl_hdr(cl, CLIENT_DISCONNECT_RES_CMD, - dev->wr_ext_msg.data, len); + + cb = mei_io_cb_init(cl, NULL); + if (!cb) + return -ENOMEM; + cb->fop_type = MEI_FOP_DISCONNECT_RSP; + cl_dbg(dev, cl, "add disconnect response as first\n"); + list_add(&cb->list, &dev->ctrl_wr_list.list); + break; } } + return 0; } @@ -629,10 +654,7 @@ int mei_hbm_dispatch(struct mei_device *dev, struct mei_msg_hdr *hdr) dev_warn(&dev->pdev->dev, "hbm: start: version mismatch - stopping the driver.\n"); dev->hbm_state = MEI_HBM_STOPPED; - mei_hbm_stop_req_prepare(dev, &dev->wr_msg.hdr, - dev->wr_msg.data); - if (mei_write_message(dev, &dev->wr_msg.hdr, - dev->wr_msg.data)) { + if (mei_hbm_stop_req(dev)) { dev_err(&dev->pdev->dev, "hbm: start: failed to send stop request\n"); return -EIO; } @@ -778,10 +800,11 @@ int mei_hbm_dispatch(struct mei_device *dev, struct mei_msg_hdr *hdr) case ME_STOP_REQ_CMD: dev_dbg(&dev->pdev->dev, "hbm: stop request: message received\n"); - dev->hbm_state = MEI_HBM_STOPPED; - mei_hbm_stop_req_prepare(dev, &dev->wr_ext_msg.hdr, - dev->wr_ext_msg.data); + if (mei_hbm_stop_req(dev)) { + dev_err(&dev->pdev->dev, "hbm: start: failed to send stop request\n"); + return -EIO; + } break; default: BUG(); diff --git a/drivers/misc/mei/hbm.h b/drivers/misc/mei/hbm.h index 5f92188a5cd7..20e8782711c0 100644 --- a/drivers/misc/mei/hbm.h +++ b/drivers/misc/mei/hbm.h @@ -54,6 +54,7 @@ int mei_hbm_start_req(struct mei_device *dev); int mei_hbm_start_wait(struct mei_device *dev); int mei_hbm_cl_flow_control_req(struct mei_device *dev, struct mei_cl *cl); int mei_hbm_cl_disconnect_req(struct mei_device *dev, struct mei_cl *cl); +int mei_hbm_cl_disconnect_rsp(struct mei_device *dev, struct mei_cl *cl); int mei_hbm_cl_connect_req(struct mei_device *dev, struct mei_cl *cl); bool mei_hbm_version_is_supported(struct mei_device *dev); diff --git a/drivers/misc/mei/hw-me.c b/drivers/misc/mei/hw-me.c index 6f656c053b14..8dbdaaef1af5 100644 --- a/drivers/misc/mei/hw-me.c +++ b/drivers/misc/mei/hw-me.c @@ -20,10 +20,10 @@ #include <linux/interrupt.h> #include "mei_dev.h" -#include "hw-me.h" - #include "hbm.h" +#include "hw-me.h" +#include "hw-me-regs.h" /** * mei_me_reg_read - Reads 32bit data from the mei device @@ -240,11 +240,11 @@ static int mei_me_hw_ready_wait(struct mei_device *dev) mutex_unlock(&dev->device_lock); err = wait_event_interruptible_timeout(dev->wait_hw_ready, dev->recvd_hw_ready, - mei_secs_to_jiffies(MEI_INTEROP_TIMEOUT)); + mei_secs_to_jiffies(MEI_HW_READY_TIMEOUT)); mutex_lock(&dev->device_lock); if (!err && !dev->recvd_hw_ready) { if (!err) - err = -ETIMEDOUT; + err = -ETIME; dev_err(&dev->pdev->dev, "wait hw ready failed. status = %d\n", err); return err; @@ -303,7 +303,7 @@ static bool mei_me_hbuf_is_empty(struct mei_device *dev) * * @dev: the device structure * - * returns -1(ESLOTS_OVERFLOW) if overflow, otherwise empty slots count + * returns -EOVERFLOW if overflow, otherwise empty slots count */ static int mei_me_hbuf_empty_slots(struct mei_device *dev) { @@ -326,7 +326,7 @@ static size_t mei_me_hbuf_max_len(const struct mei_device *dev) /** - * mei_write_message - writes a message to mei device. + * mei_me_write_message - writes a message to mei device. * * @dev: the device structure * @header: mei HECI header of message @@ -354,7 +354,7 @@ static int mei_me_write_message(struct mei_device *dev, dw_cnt = mei_data2slots(length); if (empty_slots < 0 || dw_cnt > empty_slots) - return -EIO; + return -EMSGSIZE; mei_me_reg_write(hw, H_CB_WW, *((u32 *) header)); @@ -381,7 +381,7 @@ static int mei_me_write_message(struct mei_device *dev, * * @dev: the device structure * - * returns -1(ESLOTS_OVERFLOW) if overflow, otherwise filled slots count + * returns -EOVERFLOW if overflow, otherwise filled slots count */ static int mei_me_count_full_read_slots(struct mei_device *dev) { @@ -505,17 +505,25 @@ irqreturn_t mei_me_irq_thread_handler(int irq, void *dev_id) /* check slots available for reading */ slots = mei_count_full_read_slots(dev); while (slots > 0) { - /* we have urgent data to send so break the read */ - if (dev->wr_ext_msg.hdr.length) - break; dev_dbg(&dev->pdev->dev, "slots to read = %08x\n", slots); rets = mei_irq_read_handler(dev, &complete_list, &slots); + /* There is a race between ME write and interrupt delivery: + * Not all data is always available immediately after the + * interrupt, so try to read again on the next interrupt. + */ + if (rets == -ENODATA) + break; + if (rets && dev->dev_state != MEI_DEV_RESETTING) { + dev_err(&dev->pdev->dev, "mei_irq_read_handler ret = %d.\n", + rets); schedule_work(&dev->reset_work); goto end; } } + dev->hbuf_is_ready = mei_hbuf_is_ready(dev); + rets = mei_irq_write_handler(dev, &complete_list); dev->hbuf_is_ready = mei_hbuf_is_ready(dev); diff --git a/drivers/misc/mei/hw-txe-regs.h b/drivers/misc/mei/hw-txe-regs.h new file mode 100644 index 000000000000..7283c24c1af1 --- /dev/null +++ b/drivers/misc/mei/hw-txe-regs.h @@ -0,0 +1,294 @@ +/****************************************************************************** + * Intel Management Engine Interface (Intel MEI) Linux driver + * Intel MEI Interface Header + * + * This file is provided under a dual BSD/GPLv2 license. When using or + * redistributing this file, you may do so under either license. + * + * GPL LICENSE SUMMARY + * + * Copyright(c) 2013 - 2014 Intel Corporation. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of version 2 of the GNU General Public License as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * The full GNU General Public License is included in this distribution + * in the file called COPYING + * + * Contact Information: + * Intel Corporation. + * linux-mei@linux.intel.com + * http://www.intel.com + * + * BSD LICENSE + * + * Copyright(c) 2013 - 2014 Intel Corporation. All rights reserved. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * * Neither the name Intel Corporation nor the names of its + * contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + *****************************************************************************/ +#ifndef _MEI_HW_TXE_REGS_H_ +#define _MEI_HW_TXE_REGS_H_ + +#include "hw.h" + +#define SEC_ALIVENESS_TIMER_TIMEOUT (5 * MSEC_PER_SEC) +#define SEC_ALIVENESS_WAIT_TIMEOUT (1 * MSEC_PER_SEC) +#define SEC_RESET_WAIT_TIMEOUT (1 * MSEC_PER_SEC) +#define SEC_READY_WAIT_TIMEOUT (5 * MSEC_PER_SEC) +#define START_MESSAGE_RESPONSE_WAIT_TIMEOUT (5 * MSEC_PER_SEC) +#define RESET_CANCEL_WAIT_TIMEOUT (1 * MSEC_PER_SEC) + +enum { + SEC_BAR, + BRIDGE_BAR, + + NUM_OF_MEM_BARS +}; + +/* SeC FW Status Register + * + * FW uses this register in order to report its status to host. + * This register resides in PCI-E config space. + */ +#define PCI_CFG_TXE_FW_STS0 0x40 +# define PCI_CFG_TXE_FW_STS0_WRK_ST_MSK 0x0000000F +# define PCI_CFG_TXE_FW_STS0_OP_ST_MSK 0x000001C0 +# define PCI_CFG_TXE_FW_STS0_FW_INIT_CMPLT 0x00000200 +# define PCI_CFG_TXE_FW_STS0_ERR_CODE_MSK 0x0000F000 +# define PCI_CFG_TXE_FW_STS0_OP_MODE_MSK 0x000F0000 +# define PCI_CFG_TXE_FW_STS0_RST_CNT_MSK 0x00F00000 + + +#define IPC_BASE_ADDR 0x80400 /* SeC IPC Base Address */ + +/* IPC Input Doorbell Register */ +#define SEC_IPC_INPUT_DOORBELL_REG (0x0000 + IPC_BASE_ADDR) + +/* IPC Input Status Register + * This register indicates whether or not processing of + * the most recent command has been completed by the SEC + * New commands and payloads should not be written by the Host + * until this indicates that the previous command has been processed. + */ +#define SEC_IPC_INPUT_STATUS_REG (0x0008 + IPC_BASE_ADDR) +# define SEC_IPC_INPUT_STATUS_RDY BIT(0) + +/* IPC Host Interrupt Status Register */ +#define SEC_IPC_HOST_INT_STATUS_REG (0x0010 + IPC_BASE_ADDR) +#define SEC_IPC_HOST_INT_STATUS_OUT_DB BIT(0) +#define SEC_IPC_HOST_INT_STATUS_IN_RDY BIT(1) +#define SEC_IPC_HOST_INT_STATUS_HDCP_M0_RCVD BIT(5) +#define SEC_IPC_HOST_INT_STATUS_ILL_MEM_ACCESS BIT(17) +#define SEC_IPC_HOST_INT_STATUS_AES_HKEY_ERR BIT(18) +#define SEC_IPC_HOST_INT_STATUS_DES_HKEY_ERR BIT(19) +#define SEC_IPC_HOST_INT_STATUS_TMRMTB_OVERFLOW BIT(21) + +/* Convenient mask for pending interrupts */ +#define SEC_IPC_HOST_INT_STATUS_PENDING \ + (SEC_IPC_HOST_INT_STATUS_OUT_DB| \ + SEC_IPC_HOST_INT_STATUS_IN_RDY) + +/* IPC Host Interrupt Mask Register */ +#define SEC_IPC_HOST_INT_MASK_REG (0x0014 + IPC_BASE_ADDR) + +# define SEC_IPC_HOST_INT_MASK_OUT_DB BIT(0) /* Output Doorbell Int Mask */ +# define SEC_IPC_HOST_INT_MASK_IN_RDY BIT(1) /* Input Ready Int Mask */ + +/* IPC Input Payload RAM */ +#define SEC_IPC_INPUT_PAYLOAD_REG (0x0100 + IPC_BASE_ADDR) +/* IPC Shared Payload RAM */ +#define IPC_SHARED_PAYLOAD_REG (0x0200 + IPC_BASE_ADDR) + +/* SeC Address Translation Table Entry 2 - Ctrl + * + * This register resides also in SeC's PCI-E Memory space. + */ +#define SATT2_CTRL_REG 0x1040 +# define SATT2_CTRL_VALID_MSK BIT(0) +# define SATT2_CTRL_BR_BASE_ADDR_REG_SHIFT 8 +# define SATT2_CTRL_BRIDGE_HOST_EN_MSK BIT(12) + +/* SATT Table Entry 2 SAP Base Address Register */ +#define SATT2_SAP_BA_REG 0x1044 +/* SATT Table Entry 2 SAP Size Register. */ +#define SATT2_SAP_SIZE_REG 0x1048 + /* SATT Table Entry 2 SAP Bridge Address - LSB Register */ +#define SATT2_BRG_BA_LSB_REG 0x104C + +/* Host High-level Interrupt Status Register */ +#define HHISR_REG 0x2020 +/* Host High-level Interrupt Enable Register + * + * Resides in PCI memory space. This is the top hierarchy for + * interrupts from SeC to host, aggregating both interrupts that + * arrive through HICR registers as well as interrupts + * that arrive via IPC. + */ +#define HHIER_REG 0x2024 +#define IPC_HHIER_SEC BIT(0) +#define IPC_HHIER_BRIDGE BIT(1) +#define IPC_HHIER_MSK (IPC_HHIER_SEC | IPC_HHIER_BRIDGE) + +/* Host High-level Interrupt Mask Register. + * + * Resides in PCI memory space. + * This is the top hierarchy for masking interrupts from SeC to host. + */ +#define HHIMR_REG 0x2028 +#define IPC_HHIMR_SEC BIT(0) +#define IPC_HHIMR_BRIDGE BIT(1) + +/* Host High-level IRQ Status Register */ +#define HHIRQSR_REG 0x202C + +/* Host Interrupt Cause Register 0 - SeC IPC Readiness + * + * This register is both an ICR to Host from PCI Memory Space + * and it is also exposed in the SeC memory space. + * This register is used by SeC's IPC driver in order + * to synchronize with host about IPC interface state. + */ +#define HICR_SEC_IPC_READINESS_REG 0x2040 +#define HICR_SEC_IPC_READINESS_HOST_RDY BIT(0) +#define HICR_SEC_IPC_READINESS_SEC_RDY BIT(1) +#define HICR_SEC_IPC_READINESS_SYS_RDY \ + (HICR_SEC_IPC_READINESS_HOST_RDY | \ + HICR_SEC_IPC_READINESS_SEC_RDY) +#define HICR_SEC_IPC_READINESS_RDY_CLR BIT(2) + +/* Host Interrupt Cause Register 1 - Aliveness Response */ +/* This register is both an ICR to Host from PCI Memory Space + * and it is also exposed in the SeC memory space. + * The register may be used by SeC to ACK a host request for aliveness. + */ +#define HICR_HOST_ALIVENESS_RESP_REG 0x2044 +#define HICR_HOST_ALIVENESS_RESP_ACK BIT(0) + +/* Host Interrupt Cause Register 2 - SeC IPC Output Doorbell */ +#define HICR_SEC_IPC_OUTPUT_DOORBELL_REG 0x2048 + +/* Host Interrupt Status Register. + * + * Resides in PCI memory space. + * This is the main register involved in generating interrupts + * from SeC to host via HICRs. + * The interrupt generation rules are as follows: + * An interrupt will be generated whenever for any i, + * there is a transition from a state where at least one of + * the following conditions did not hold, to a state where + * ALL the following conditions hold: + * A) HISR.INT[i]_STS == 1. + * B) HIER.INT[i]_EN == 1. + */ +#define HISR_REG 0x2060 +#define HISR_INT_0_STS BIT(0) +#define HISR_INT_1_STS BIT(1) +#define HISR_INT_2_STS BIT(2) +#define HISR_INT_3_STS BIT(3) +#define HISR_INT_4_STS BIT(4) +#define HISR_INT_5_STS BIT(5) +#define HISR_INT_6_STS BIT(6) +#define HISR_INT_7_STS BIT(7) +#define HISR_INT_STS_MSK \ + (HISR_INT_0_STS | HISR_INT_1_STS | HISR_INT_2_STS) + +/* Host Interrupt Enable Register. Resides in PCI memory space. */ +#define HIER_REG 0x2064 +#define HIER_INT_0_EN BIT(0) +#define HIER_INT_1_EN BIT(1) +#define HIER_INT_2_EN BIT(2) +#define HIER_INT_3_EN BIT(3) +#define HIER_INT_4_EN BIT(4) +#define HIER_INT_5_EN BIT(5) +#define HIER_INT_6_EN BIT(6) +#define HIER_INT_7_EN BIT(7) + +#define HIER_INT_EN_MSK \ + (HIER_INT_0_EN | HIER_INT_1_EN | HIER_INT_2_EN) + + +/* SEC Memory Space IPC output payload. + * + * This register is part of the output payload which SEC provides to host. + */ +#define BRIDGE_IPC_OUTPUT_PAYLOAD_REG 0x20C0 + +/* SeC Interrupt Cause Register - Host Aliveness Request + * This register is both an ICR to SeC and it is also exposed + * in the host-visible PCI memory space. + * The register is used by host to request SeC aliveness. + */ +#define SICR_HOST_ALIVENESS_REQ_REG 0x214C +#define SICR_HOST_ALIVENESS_REQ_REQUESTED BIT(0) + + +/* SeC Interrupt Cause Register - Host IPC Readiness + * + * This register is both an ICR to SeC and it is also exposed + * in the host-visible PCI memory space. + * This register is used by the host's SeC driver uses in order + * to synchronize with SeC about IPC interface state. + */ +#define SICR_HOST_IPC_READINESS_REQ_REG 0x2150 + + +#define SICR_HOST_IPC_READINESS_HOST_RDY BIT(0) +#define SICR_HOST_IPC_READINESS_SEC_RDY BIT(1) +#define SICR_HOST_IPC_READINESS_SYS_RDY \ + (SICR_HOST_IPC_READINESS_HOST_RDY | \ + SICR_HOST_IPC_READINESS_SEC_RDY) +#define SICR_HOST_IPC_READINESS_RDY_CLR BIT(2) + +/* SeC Interrupt Cause Register - SeC IPC Output Status + * + * This register indicates whether or not processing of the most recent + * command has been completed by the Host. + * New commands and payloads should not be written by SeC until this + * register indicates that the previous command has been processed. + */ +#define SICR_SEC_IPC_OUTPUT_STATUS_REG 0x2154 +# define SEC_IPC_OUTPUT_STATUS_RDY BIT(0) + + + +/* MEI IPC Message payload size 64 bytes */ +#define PAYLOAD_SIZE 64 + +/* MAX size for SATT range 32MB */ +#define SATT_RANGE_MAX (32 << 20) + + +#endif /* _MEI_HW_TXE_REGS_H_ */ + diff --git a/drivers/misc/mei/hw-txe.c b/drivers/misc/mei/hw-txe.c new file mode 100644 index 000000000000..f60182a52f96 --- /dev/null +++ b/drivers/misc/mei/hw-txe.c @@ -0,0 +1,1107 @@ +/* + * + * Intel Management Engine Interface (Intel MEI) Linux driver + * Copyright (c) 2013-2014, Intel Corporation. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + * + */ + +#include <linux/pci.h> +#include <linux/jiffies.h> +#include <linux/delay.h> +#include <linux/kthread.h> +#include <linux/irqreturn.h> + +#include <linux/mei.h> + +#include "mei_dev.h" +#include "hw-txe.h" +#include "client.h" +#include "hbm.h" + +/** + * mei_txe_reg_read - Reads 32bit data from the device + * + * @base_addr: registers base address + * @offset: register offset + * + */ +static inline u32 mei_txe_reg_read(void __iomem *base_addr, + unsigned long offset) +{ + return ioread32(base_addr + offset); +} + +/** + * mei_txe_reg_write - Writes 32bit data to the device + * + * @base_addr: registers base address + * @offset: register offset + * @value: the value to write + */ +static inline void mei_txe_reg_write(void __iomem *base_addr, + unsigned long offset, u32 value) +{ + iowrite32(value, base_addr + offset); +} + +/** + * mei_txe_sec_reg_read_silent - Reads 32bit data from the SeC BAR + * + * @dev: the device structure + * @offset: register offset + * + * Doesn't check for aliveness while Reads 32bit data from the SeC BAR + */ +static inline u32 mei_txe_sec_reg_read_silent(struct mei_txe_hw *hw, + unsigned long offset) +{ + return mei_txe_reg_read(hw->mem_addr[SEC_BAR], offset); +} + +/** + * mei_txe_sec_reg_read - Reads 32bit data from the SeC BAR + * + * @dev: the device structure + * @offset: register offset + * + * Reads 32bit data from the SeC BAR and shout loud if aliveness is not set + */ +static inline u32 mei_txe_sec_reg_read(struct mei_txe_hw *hw, + unsigned long offset) +{ + WARN(!hw->aliveness, "sec read: aliveness not asserted\n"); + return mei_txe_sec_reg_read_silent(hw, offset); +} +/** + * mei_txe_sec_reg_write_silent - Writes 32bit data to the SeC BAR + * doesn't check for aliveness + * + * @dev: the device structure + * @offset: register offset + * @value: value to write + * + * Doesn't check for aliveness while writes 32bit data from to the SeC BAR + */ +static inline void mei_txe_sec_reg_write_silent(struct mei_txe_hw *hw, + unsigned long offset, u32 value) +{ + mei_txe_reg_write(hw->mem_addr[SEC_BAR], offset, value); +} + +/** + * mei_txe_sec_reg_write - Writes 32bit data to the SeC BAR + * + * @dev: the device structure + * @offset: register offset + * @value: value to write + * + * Writes 32bit data from the SeC BAR and shout loud if aliveness is not set + */ +static inline void mei_txe_sec_reg_write(struct mei_txe_hw *hw, + unsigned long offset, u32 value) +{ + WARN(!hw->aliveness, "sec write: aliveness not asserted\n"); + mei_txe_sec_reg_write_silent(hw, offset, value); +} +/** + * mei_txe_br_reg_read - Reads 32bit data from the Bridge BAR + * + * @hw: the device structure + * @offset: offset from which to read the data + * + */ +static inline u32 mei_txe_br_reg_read(struct mei_txe_hw *hw, + unsigned long offset) +{ + return mei_txe_reg_read(hw->mem_addr[BRIDGE_BAR], offset); +} + +/** + * mei_txe_br_reg_write - Writes 32bit data to the Bridge BAR + * + * @hw: the device structure + * @offset: offset from which to write the data + * @value: the byte to write + */ +static inline void mei_txe_br_reg_write(struct mei_txe_hw *hw, + unsigned long offset, u32 value) +{ + mei_txe_reg_write(hw->mem_addr[BRIDGE_BAR], offset, value); +} + +/** + * mei_txe_aliveness_set - request for aliveness change + * + * @dev: the device structure + * @req: requested aliveness value + * + * Request for aliveness change and returns true if the change is + * really needed and false if aliveness is already + * in the requested state + * Requires device lock to be held + */ +static bool mei_txe_aliveness_set(struct mei_device *dev, u32 req) +{ + + struct mei_txe_hw *hw = to_txe_hw(dev); + bool do_req = hw->aliveness != req; + + dev_dbg(&dev->pdev->dev, "Aliveness current=%d request=%d\n", + hw->aliveness, req); + if (do_req) { + hw->recvd_aliveness = false; + mei_txe_br_reg_write(hw, SICR_HOST_ALIVENESS_REQ_REG, req); + } + return do_req; +} + + +/** + * mei_txe_aliveness_req_get - get aliveness requested register value + * + * @dev: the device structure + * + * Extract HICR_HOST_ALIVENESS_RESP_ACK bit from + * from HICR_HOST_ALIVENESS_REQ register value + */ +static u32 mei_txe_aliveness_req_get(struct mei_device *dev) +{ + struct mei_txe_hw *hw = to_txe_hw(dev); + u32 reg; + reg = mei_txe_br_reg_read(hw, SICR_HOST_ALIVENESS_REQ_REG); + return reg & SICR_HOST_ALIVENESS_REQ_REQUESTED; +} + +/** + * mei_txe_aliveness_get - get aliveness response register value + * @dev: the device structure + * + * Extract HICR_HOST_ALIVENESS_RESP_ACK bit + * from HICR_HOST_ALIVENESS_RESP register value + */ +static u32 mei_txe_aliveness_get(struct mei_device *dev) +{ + struct mei_txe_hw *hw = to_txe_hw(dev); + u32 reg; + reg = mei_txe_br_reg_read(hw, HICR_HOST_ALIVENESS_RESP_REG); + return reg & HICR_HOST_ALIVENESS_RESP_ACK; +} + +/** + * mei_txe_aliveness_poll - waits for aliveness to settle + * + * @dev: the device structure + * @expected: expected aliveness value + * + * Polls for HICR_HOST_ALIVENESS_RESP.ALIVENESS_RESP to be set + * returns > 0 if the expected value was received, -ETIME otherwise + */ +static int mei_txe_aliveness_poll(struct mei_device *dev, u32 expected) +{ + struct mei_txe_hw *hw = to_txe_hw(dev); + int t = 0; + + do { + hw->aliveness = mei_txe_aliveness_get(dev); + if (hw->aliveness == expected) { + dev_dbg(&dev->pdev->dev, + "aliveness settled after %d msecs\n", t); + return t; + } + mutex_unlock(&dev->device_lock); + msleep(MSEC_PER_SEC / 5); + mutex_lock(&dev->device_lock); + t += MSEC_PER_SEC / 5; + } while (t < SEC_ALIVENESS_WAIT_TIMEOUT); + + dev_err(&dev->pdev->dev, "aliveness timed out\n"); + return -ETIME; +} + +/** + * mei_txe_aliveness_wait - waits for aliveness to settle + * + * @dev: the device structure + * @expected: expected aliveness value + * + * Waits for HICR_HOST_ALIVENESS_RESP.ALIVENESS_RESP to be set + * returns returns 0 on success and < 0 otherwise + */ +static int mei_txe_aliveness_wait(struct mei_device *dev, u32 expected) +{ + struct mei_txe_hw *hw = to_txe_hw(dev); + const unsigned long timeout = + msecs_to_jiffies(SEC_ALIVENESS_WAIT_TIMEOUT); + long err; + int ret; + + hw->aliveness = mei_txe_aliveness_get(dev); + if (hw->aliveness == expected) + return 0; + + mutex_unlock(&dev->device_lock); + err = wait_event_timeout(hw->wait_aliveness, + hw->recvd_aliveness, timeout); + mutex_lock(&dev->device_lock); + + hw->aliveness = mei_txe_aliveness_get(dev); + ret = hw->aliveness == expected ? 0 : -ETIME; + + if (ret) + dev_err(&dev->pdev->dev, "aliveness timed out"); + else + dev_dbg(&dev->pdev->dev, "aliveness settled after %d msecs\n", + jiffies_to_msecs(timeout - err)); + hw->recvd_aliveness = false; + return ret; +} + +/** + * mei_txe_aliveness_set_sync - sets an wait for aliveness to complete + * + * @dev: the device structure + * + * returns returns 0 on success and < 0 otherwise + */ +int mei_txe_aliveness_set_sync(struct mei_device *dev, u32 req) +{ + if (mei_txe_aliveness_set(dev, req)) + return mei_txe_aliveness_wait(dev, req); + return 0; +} + +/** + * mei_txe_input_ready_interrupt_enable - sets the Input Ready Interrupt + * + * @dev: the device structure + */ +static void mei_txe_input_ready_interrupt_enable(struct mei_device *dev) +{ + struct mei_txe_hw *hw = to_txe_hw(dev); + u32 hintmsk; + /* Enable the SEC_IPC_HOST_INT_MASK_IN_RDY interrupt */ + hintmsk = mei_txe_sec_reg_read(hw, SEC_IPC_HOST_INT_MASK_REG); + hintmsk |= SEC_IPC_HOST_INT_MASK_IN_RDY; + mei_txe_sec_reg_write(hw, SEC_IPC_HOST_INT_MASK_REG, hintmsk); +} + +/** + * mei_txe_input_doorbell_set + * - Sets bit 0 in SEC_IPC_INPUT_DOORBELL.IPC_INPUT_DOORBELL. + * @dev: the device structure + */ +static void mei_txe_input_doorbell_set(struct mei_txe_hw *hw) +{ + /* Clear the interrupt cause */ + clear_bit(TXE_INTR_IN_READY_BIT, &hw->intr_cause); + mei_txe_sec_reg_write(hw, SEC_IPC_INPUT_DOORBELL_REG, 1); +} + +/** + * mei_txe_output_ready_set - Sets the SICR_SEC_IPC_OUTPUT_STATUS bit to 1 + * + * @dev: the device structure + */ +static void mei_txe_output_ready_set(struct mei_txe_hw *hw) +{ + mei_txe_br_reg_write(hw, + SICR_SEC_IPC_OUTPUT_STATUS_REG, + SEC_IPC_OUTPUT_STATUS_RDY); +} + +/** + * mei_txe_is_input_ready - check if TXE is ready for receiving data + * + * @dev: the device structure + */ +static bool mei_txe_is_input_ready(struct mei_device *dev) +{ + struct mei_txe_hw *hw = to_txe_hw(dev); + u32 status; + status = mei_txe_sec_reg_read(hw, SEC_IPC_INPUT_STATUS_REG); + return !!(SEC_IPC_INPUT_STATUS_RDY & status); +} + +/** + * mei_txe_intr_clear - clear all interrupts + * + * @dev: the device structure + */ +static inline void mei_txe_intr_clear(struct mei_device *dev) +{ + struct mei_txe_hw *hw = to_txe_hw(dev); + mei_txe_sec_reg_write_silent(hw, SEC_IPC_HOST_INT_STATUS_REG, + SEC_IPC_HOST_INT_STATUS_PENDING); + mei_txe_br_reg_write(hw, HISR_REG, HISR_INT_STS_MSK); + mei_txe_br_reg_write(hw, HHISR_REG, IPC_HHIER_MSK); +} + +/** + * mei_txe_intr_disable - disable all interrupts + * + * @dev: the device structure + */ +static void mei_txe_intr_disable(struct mei_device *dev) +{ + struct mei_txe_hw *hw = to_txe_hw(dev); + mei_txe_br_reg_write(hw, HHIER_REG, 0); + mei_txe_br_reg_write(hw, HIER_REG, 0); +} +/** + * mei_txe_intr_disable - enable all interrupts + * + * @dev: the device structure + */ +static void mei_txe_intr_enable(struct mei_device *dev) +{ + struct mei_txe_hw *hw = to_txe_hw(dev); + mei_txe_br_reg_write(hw, HHIER_REG, IPC_HHIER_MSK); + mei_txe_br_reg_write(hw, HIER_REG, HIER_INT_EN_MSK); +} + +/** + * mei_txe_pending_interrupts - check if there are pending interrupts + * only Aliveness, Input ready, and output doorbell are of relevance + * + * @dev: the device structure + * + * Checks if there are pending interrupts + * only Aliveness, Readiness, Input ready, and Output doorbell are relevant + */ +static bool mei_txe_pending_interrupts(struct mei_device *dev) +{ + + struct mei_txe_hw *hw = to_txe_hw(dev); + bool ret = (hw->intr_cause & (TXE_INTR_READINESS | + TXE_INTR_ALIVENESS | + TXE_INTR_IN_READY | + TXE_INTR_OUT_DB)); + + if (ret) { + dev_dbg(&dev->pdev->dev, + "Pending Interrupts InReady=%01d Readiness=%01d, Aliveness=%01d, OutDoor=%01d\n", + !!(hw->intr_cause & TXE_INTR_IN_READY), + !!(hw->intr_cause & TXE_INTR_READINESS), + !!(hw->intr_cause & TXE_INTR_ALIVENESS), + !!(hw->intr_cause & TXE_INTR_OUT_DB)); + } + return ret; +} + +/** + * mei_txe_input_payload_write - write a dword to the host buffer + * at offset idx + * + * @dev: the device structure + * @idx: index in the host buffer + * @value: value + */ +static void mei_txe_input_payload_write(struct mei_device *dev, + unsigned long idx, u32 value) +{ + struct mei_txe_hw *hw = to_txe_hw(dev); + mei_txe_sec_reg_write(hw, SEC_IPC_INPUT_PAYLOAD_REG + + (idx * sizeof(u32)), value); +} + +/** + * mei_txe_out_data_read - read dword from the device buffer + * at offset idx + * + * @dev: the device structure + * @idx: index in the device buffer + * + * returns register value at index + */ +static u32 mei_txe_out_data_read(const struct mei_device *dev, + unsigned long idx) +{ + struct mei_txe_hw *hw = to_txe_hw(dev); + return mei_txe_br_reg_read(hw, + BRIDGE_IPC_OUTPUT_PAYLOAD_REG + (idx * sizeof(u32))); +} + +/* Readiness */ + +/** + * mei_txe_readiness_set_host_rdy + * + * @dev: the device structure + */ +static void mei_txe_readiness_set_host_rdy(struct mei_device *dev) +{ + struct mei_txe_hw *hw = to_txe_hw(dev); + mei_txe_br_reg_write(hw, + SICR_HOST_IPC_READINESS_REQ_REG, + SICR_HOST_IPC_READINESS_HOST_RDY); +} + +/** + * mei_txe_readiness_clear + * + * @dev: the device structure + */ +static void mei_txe_readiness_clear(struct mei_device *dev) +{ + struct mei_txe_hw *hw = to_txe_hw(dev); + mei_txe_br_reg_write(hw, SICR_HOST_IPC_READINESS_REQ_REG, + SICR_HOST_IPC_READINESS_RDY_CLR); +} +/** + * mei_txe_readiness_get - Reads and returns + * the HICR_SEC_IPC_READINESS register value + * + * @dev: the device structure + */ +static u32 mei_txe_readiness_get(struct mei_device *dev) +{ + struct mei_txe_hw *hw = to_txe_hw(dev); + return mei_txe_br_reg_read(hw, HICR_SEC_IPC_READINESS_REG); +} + + +/** + * mei_txe_readiness_is_sec_rdy - check readiness + * for HICR_SEC_IPC_READINESS_SEC_RDY + * + * @readiness - cached readiness state + */ +static inline bool mei_txe_readiness_is_sec_rdy(u32 readiness) +{ + return !!(readiness & HICR_SEC_IPC_READINESS_SEC_RDY); +} + +/** + * mei_txe_hw_is_ready - check if the hw is ready + * + * @dev: the device structure + */ +static bool mei_txe_hw_is_ready(struct mei_device *dev) +{ + u32 readiness = mei_txe_readiness_get(dev); + return mei_txe_readiness_is_sec_rdy(readiness); +} + +/** + * mei_txe_host_is_ready - check if the host is ready + * + * @dev: the device structure + */ +static inline bool mei_txe_host_is_ready(struct mei_device *dev) +{ + struct mei_txe_hw *hw = to_txe_hw(dev); + u32 reg = mei_txe_br_reg_read(hw, HICR_SEC_IPC_READINESS_REG); + return !!(reg & HICR_SEC_IPC_READINESS_HOST_RDY); +} + +/** + * mei_txe_readiness_wait - wait till readiness settles + * + * @dev: the device structure + * + * returns 0 on success and -ETIME on timeout + */ +static int mei_txe_readiness_wait(struct mei_device *dev) +{ + if (mei_txe_hw_is_ready(dev)) + return 0; + + mutex_unlock(&dev->device_lock); + wait_event_timeout(dev->wait_hw_ready, dev->recvd_hw_ready, + msecs_to_jiffies(SEC_RESET_WAIT_TIMEOUT)); + mutex_lock(&dev->device_lock); + if (!dev->recvd_hw_ready) { + dev_err(&dev->pdev->dev, "wait for readiness failed\n"); + return -ETIME; + } + + dev->recvd_hw_ready = false; + return 0; +} + +/** + * mei_txe_hw_config - configure hardware at the start of the devices + * + * @dev: the device structure + * + * Configure hardware at the start of the device should be done only + * once at the device probe time + */ +static void mei_txe_hw_config(struct mei_device *dev) +{ + + struct mei_txe_hw *hw = to_txe_hw(dev); + /* Doesn't change in runtime */ + dev->hbuf_depth = PAYLOAD_SIZE / 4; + + hw->aliveness = mei_txe_aliveness_get(dev); + hw->readiness = mei_txe_readiness_get(dev); + + dev_dbg(&dev->pdev->dev, "aliveness_resp = 0x%08x, readiness = 0x%08x.\n", + hw->aliveness, hw->readiness); +} + + +/** + * mei_txe_write - writes a message to device. + * + * @dev: the device structure + * @header: header of message + * @buf: message buffer will be written + * returns 1 if success, 0 - otherwise. + */ + +static int mei_txe_write(struct mei_device *dev, + struct mei_msg_hdr *header, unsigned char *buf) +{ + struct mei_txe_hw *hw = to_txe_hw(dev); + unsigned long rem; + unsigned long length; + int slots = dev->hbuf_depth; + u32 *reg_buf = (u32 *)buf; + u32 dw_cnt; + int i; + + if (WARN_ON(!header || !buf)) + return -EINVAL; + + length = header->length; + + dev_dbg(&dev->pdev->dev, MEI_HDR_FMT, MEI_HDR_PRM(header)); + + dw_cnt = mei_data2slots(length); + if (dw_cnt > slots) + return -EMSGSIZE; + + if (WARN(!hw->aliveness, "txe write: aliveness not asserted\n")) + return -EAGAIN; + + /* Enable Input Ready Interrupt. */ + mei_txe_input_ready_interrupt_enable(dev); + + if (!mei_txe_is_input_ready(dev)) { + dev_err(&dev->pdev->dev, "Input is not ready"); + return -EAGAIN; + } + + mei_txe_input_payload_write(dev, 0, *((u32 *)header)); + + for (i = 0; i < length / 4; i++) + mei_txe_input_payload_write(dev, i + 1, reg_buf[i]); + + rem = length & 0x3; + if (rem > 0) { + u32 reg = 0; + memcpy(®, &buf[length - rem], rem); + mei_txe_input_payload_write(dev, i + 1, reg); + } + + /* after each write the whole buffer is consumed */ + hw->slots = 0; + + /* Set Input-Doorbell */ + mei_txe_input_doorbell_set(hw); + + return 0; +} + +/** + * mei_txe_hbuf_max_len - mimics the me hbuf circular buffer + * + * @dev: the device structure + * + * returns the PAYLOAD_SIZE - 4 + */ +static size_t mei_txe_hbuf_max_len(const struct mei_device *dev) +{ + return PAYLOAD_SIZE - sizeof(struct mei_msg_hdr); +} + +/** + * mei_txe_hbuf_empty_slots - mimics the me hbuf circular buffer + * + * @dev: the device structure + * + * returns always hbuf_depth + */ +static int mei_txe_hbuf_empty_slots(struct mei_device *dev) +{ + struct mei_txe_hw *hw = to_txe_hw(dev); + return hw->slots; +} + +/** + * mei_txe_count_full_read_slots - mimics the me device circular buffer + * + * @dev: the device structure + * + * returns always buffer size in dwords count + */ +static int mei_txe_count_full_read_slots(struct mei_device *dev) +{ + /* read buffers has static size */ + return PAYLOAD_SIZE / 4; +} + +/** + * mei_txe_read_hdr - read message header which is always in 4 first bytes + * + * @dev: the device structure + * + * returns mei message header + */ + +static u32 mei_txe_read_hdr(const struct mei_device *dev) +{ + return mei_txe_out_data_read(dev, 0); +} +/** + * mei_txe_read - reads a message from the txe device. + * + * @dev: the device structure + * @buf: message buffer will be written + * @len: message size will be read + * + * returns -EINVAL on error wrong argument and 0 on success + */ +static int mei_txe_read(struct mei_device *dev, + unsigned char *buf, unsigned long len) +{ + + struct mei_txe_hw *hw = to_txe_hw(dev); + u32 i; + u32 *reg_buf = (u32 *)buf; + u32 rem = len & 0x3; + + if (WARN_ON(!buf || !len)) + return -EINVAL; + + dev_dbg(&dev->pdev->dev, + "buffer-length = %lu buf[0]0x%08X\n", + len, mei_txe_out_data_read(dev, 0)); + + for (i = 0; i < len / 4; i++) { + /* skip header: index starts from 1 */ + u32 reg = mei_txe_out_data_read(dev, i + 1); + dev_dbg(&dev->pdev->dev, "buf[%d] = 0x%08X\n", i, reg); + *reg_buf++ = reg; + } + + if (rem) { + u32 reg = mei_txe_out_data_read(dev, i + 1); + memcpy(reg_buf, ®, rem); + } + + mei_txe_output_ready_set(hw); + return 0; +} + +/** + * mei_txe_hw_reset - resets host and fw. + * + * @dev: the device structure + * @intr_enable: if interrupt should be enabled after reset. + * + * returns 0 on success and < 0 in case of error + */ +static int mei_txe_hw_reset(struct mei_device *dev, bool intr_enable) +{ + struct mei_txe_hw *hw = to_txe_hw(dev); + + u32 aliveness_req; + /* + * read input doorbell to ensure consistency between Bridge and SeC + * return value might be garbage return + */ + (void)mei_txe_sec_reg_read_silent(hw, SEC_IPC_INPUT_DOORBELL_REG); + + aliveness_req = mei_txe_aliveness_req_get(dev); + hw->aliveness = mei_txe_aliveness_get(dev); + + /* Disable interrupts in this stage we will poll */ + mei_txe_intr_disable(dev); + + /* + * If Aliveness Request and Aliveness Response are not equal then + * wait for them to be equal + * Since we might have interrupts disabled - poll for it + */ + if (aliveness_req != hw->aliveness) + if (mei_txe_aliveness_poll(dev, aliveness_req) < 0) { + dev_err(&dev->pdev->dev, + "wait for aliveness settle failed ... bailing out\n"); + return -EIO; + } + + /* + * If Aliveness Request and Aliveness Response are set then clear them + */ + if (aliveness_req) { + mei_txe_aliveness_set(dev, 0); + if (mei_txe_aliveness_poll(dev, 0) < 0) { + dev_err(&dev->pdev->dev, + "wait for aliveness failed ... bailing out\n"); + return -EIO; + } + } + + /* + * Set rediness RDY_CLR bit + */ + mei_txe_readiness_clear(dev); + + return 0; +} + +/** + * mei_txe_hw_start - start the hardware after reset + * + * @dev: the device structure + * + * returns 0 on success and < 0 in case of error + */ +static int mei_txe_hw_start(struct mei_device *dev) +{ + struct mei_txe_hw *hw = to_txe_hw(dev); + int ret; + + u32 hisr; + + /* bring back interrupts */ + mei_txe_intr_enable(dev); + + ret = mei_txe_readiness_wait(dev); + if (ret < 0) { + dev_err(&dev->pdev->dev, "wating for readiness failed\n"); + return ret; + } + + /* + * If HISR.INT2_STS interrupt status bit is set then clear it. + */ + hisr = mei_txe_br_reg_read(hw, HISR_REG); + if (hisr & HISR_INT_2_STS) + mei_txe_br_reg_write(hw, HISR_REG, HISR_INT_2_STS); + + /* Clear the interrupt cause of OutputDoorbell */ + clear_bit(TXE_INTR_OUT_DB_BIT, &hw->intr_cause); + + ret = mei_txe_aliveness_set_sync(dev, 1); + if (ret < 0) { + dev_err(&dev->pdev->dev, "wait for aliveness failed ... bailing out\n"); + return ret; + } + + /* enable input ready interrupts: + * SEC_IPC_HOST_INT_MASK.IPC_INPUT_READY_INT_MASK + */ + mei_txe_input_ready_interrupt_enable(dev); + + + /* Set the SICR_SEC_IPC_OUTPUT_STATUS.IPC_OUTPUT_READY bit */ + mei_txe_output_ready_set(hw); + + /* Set bit SICR_HOST_IPC_READINESS.HOST_RDY + */ + mei_txe_readiness_set_host_rdy(dev); + + return 0; +} + +/** + * mei_txe_check_and_ack_intrs - translate multi BAR interrupt into + * single bit mask and acknowledge the interrupts + * + * @dev: the device structure + * @do_ack: acknowledge interrupts + */ +static bool mei_txe_check_and_ack_intrs(struct mei_device *dev, bool do_ack) +{ + struct mei_txe_hw *hw = to_txe_hw(dev); + u32 hisr; + u32 hhisr; + u32 ipc_isr; + u32 aliveness; + bool generated; + + /* read interrupt registers */ + hhisr = mei_txe_br_reg_read(hw, HHISR_REG); + generated = (hhisr & IPC_HHIER_MSK); + if (!generated) + goto out; + + hisr = mei_txe_br_reg_read(hw, HISR_REG); + + aliveness = mei_txe_aliveness_get(dev); + if (hhisr & IPC_HHIER_SEC && aliveness) + ipc_isr = mei_txe_sec_reg_read_silent(hw, + SEC_IPC_HOST_INT_STATUS_REG); + else + ipc_isr = 0; + + generated = generated || + (hisr & HISR_INT_STS_MSK) || + (ipc_isr & SEC_IPC_HOST_INT_STATUS_PENDING); + + if (generated && do_ack) { + /* Save the interrupt causes */ + hw->intr_cause |= hisr & HISR_INT_STS_MSK; + if (ipc_isr & SEC_IPC_HOST_INT_STATUS_IN_RDY) + hw->intr_cause |= TXE_INTR_IN_READY; + + + mei_txe_intr_disable(dev); + /* Clear the interrupts in hierarchy: + * IPC and Bridge, than the High Level */ + mei_txe_sec_reg_write_silent(hw, + SEC_IPC_HOST_INT_STATUS_REG, ipc_isr); + mei_txe_br_reg_write(hw, HISR_REG, hisr); + mei_txe_br_reg_write(hw, HHISR_REG, hhisr); + } + +out: + return generated; +} + +/** + * mei_txe_irq_quick_handler - The ISR of the MEI device + * + * @irq: The irq number + * @dev_id: pointer to the device structure + * + * returns irqreturn_t + */ +irqreturn_t mei_txe_irq_quick_handler(int irq, void *dev_id) +{ + struct mei_device *dev = dev_id; + + if (mei_txe_check_and_ack_intrs(dev, true)) + return IRQ_WAKE_THREAD; + return IRQ_NONE; +} + + +/** + * mei_txe_irq_thread_handler - txe interrupt thread + * + * @irq: The irq number + * @dev_id: pointer to the device structure + * + * returns irqreturn_t + * + */ +irqreturn_t mei_txe_irq_thread_handler(int irq, void *dev_id) +{ + struct mei_device *dev = (struct mei_device *) dev_id; + struct mei_txe_hw *hw = to_txe_hw(dev); + struct mei_cl_cb complete_list; + s32 slots; + int rets = 0; + + dev_dbg(&dev->pdev->dev, "irq thread: Interrupt Registers HHISR|HISR|SEC=%02X|%04X|%02X\n", + mei_txe_br_reg_read(hw, HHISR_REG), + mei_txe_br_reg_read(hw, HISR_REG), + mei_txe_sec_reg_read_silent(hw, SEC_IPC_HOST_INT_STATUS_REG)); + + + /* initialize our complete list */ + mutex_lock(&dev->device_lock); + mei_io_list_init(&complete_list); + + if (pci_dev_msi_enabled(dev->pdev)) + mei_txe_check_and_ack_intrs(dev, true); + + /* show irq events */ + mei_txe_pending_interrupts(dev); + + hw->aliveness = mei_txe_aliveness_get(dev); + hw->readiness = mei_txe_readiness_get(dev); + + /* Readiness: + * Detection of TXE driver going through reset + * or TXE driver resetting the HECI interface. + */ + if (test_and_clear_bit(TXE_INTR_READINESS_BIT, &hw->intr_cause)) { + dev_dbg(&dev->pdev->dev, "Readiness Interrupt was received...\n"); + + /* Check if SeC is going through reset */ + if (mei_txe_readiness_is_sec_rdy(hw->readiness)) { + dev_dbg(&dev->pdev->dev, "we need to start the dev.\n"); + dev->recvd_hw_ready = true; + } else { + dev->recvd_hw_ready = false; + if (dev->dev_state != MEI_DEV_RESETTING) { + + dev_warn(&dev->pdev->dev, "FW not ready: resetting.\n"); + schedule_work(&dev->reset_work); + goto end; + + } + } + wake_up(&dev->wait_hw_ready); + } + + /************************************************************/ + /* Check interrupt cause: + * Aliveness: Detection of SeC acknowledge of host request that + * it remain alive or host cancellation of that request. + */ + + if (test_and_clear_bit(TXE_INTR_ALIVENESS_BIT, &hw->intr_cause)) { + /* Clear the interrupt cause */ + dev_dbg(&dev->pdev->dev, + "Aliveness Interrupt: Status: %d\n", hw->aliveness); + hw->recvd_aliveness = true; + if (waitqueue_active(&hw->wait_aliveness)) + wake_up(&hw->wait_aliveness); + } + + + /* Output Doorbell: + * Detection of SeC having sent output to host + */ + slots = mei_count_full_read_slots(dev); + if (test_and_clear_bit(TXE_INTR_OUT_DB_BIT, &hw->intr_cause)) { + /* Read from TXE */ + rets = mei_irq_read_handler(dev, &complete_list, &slots); + if (rets && dev->dev_state != MEI_DEV_RESETTING) { + dev_err(&dev->pdev->dev, + "mei_irq_read_handler ret = %d.\n", rets); + + schedule_work(&dev->reset_work); + goto end; + } + } + /* Input Ready: Detection if host can write to SeC */ + if (test_and_clear_bit(TXE_INTR_IN_READY_BIT, &hw->intr_cause)) { + dev->hbuf_is_ready = true; + hw->slots = dev->hbuf_depth; + } + + if (hw->aliveness && dev->hbuf_is_ready) { + /* get the real register value */ + dev->hbuf_is_ready = mei_hbuf_is_ready(dev); + rets = mei_irq_write_handler(dev, &complete_list); + if (rets && rets != -EMSGSIZE) + dev_err(&dev->pdev->dev, "mei_irq_write_handler ret = %d.\n", + rets); + dev->hbuf_is_ready = mei_hbuf_is_ready(dev); + } + + mei_irq_compl_handler(dev, &complete_list); + +end: + dev_dbg(&dev->pdev->dev, "interrupt thread end ret = %d\n", rets); + + mutex_unlock(&dev->device_lock); + + mei_enable_interrupts(dev); + return IRQ_HANDLED; +} + +static const struct mei_hw_ops mei_txe_hw_ops = { + + .host_is_ready = mei_txe_host_is_ready, + + .hw_is_ready = mei_txe_hw_is_ready, + .hw_reset = mei_txe_hw_reset, + .hw_config = mei_txe_hw_config, + .hw_start = mei_txe_hw_start, + + .intr_clear = mei_txe_intr_clear, + .intr_enable = mei_txe_intr_enable, + .intr_disable = mei_txe_intr_disable, + + .hbuf_free_slots = mei_txe_hbuf_empty_slots, + .hbuf_is_ready = mei_txe_is_input_ready, + .hbuf_max_len = mei_txe_hbuf_max_len, + + .write = mei_txe_write, + + .rdbuf_full_slots = mei_txe_count_full_read_slots, + .read_hdr = mei_txe_read_hdr, + + .read = mei_txe_read, + +}; + +/** + * mei_txe_dev_init - allocates and initializes txe hardware specific structure + * + * @pdev - pci device + * returns struct mei_device * on success or NULL; + * + */ +struct mei_device *mei_txe_dev_init(struct pci_dev *pdev) +{ + struct mei_device *dev; + struct mei_txe_hw *hw; + + dev = kzalloc(sizeof(struct mei_device) + + sizeof(struct mei_txe_hw), GFP_KERNEL); + if (!dev) + return NULL; + + mei_device_init(dev); + + hw = to_txe_hw(dev); + + init_waitqueue_head(&hw->wait_aliveness); + + dev->ops = &mei_txe_hw_ops; + + dev->pdev = pdev; + return dev; +} + +/** + * mei_txe_setup_satt2 - SATT2 configuration for DMA support. + * + * @dev: the device structure + * @addr: physical address start of the range + * @range: physical range size + */ +int mei_txe_setup_satt2(struct mei_device *dev, phys_addr_t addr, u32 range) +{ + struct mei_txe_hw *hw = to_txe_hw(dev); + + u32 lo32 = lower_32_bits(addr); + u32 hi32 = upper_32_bits(addr); + u32 ctrl; + + /* SATT is limited to 36 Bits */ + if (hi32 & ~0xF) + return -EINVAL; + + /* SATT has to be 16Byte aligned */ + if (lo32 & 0xF) + return -EINVAL; + + /* SATT range has to be 4Bytes aligned */ + if (range & 0x4) + return -EINVAL; + + /* SATT is limited to 32 MB range*/ + if (range > SATT_RANGE_MAX) + return -EINVAL; + + ctrl = SATT2_CTRL_VALID_MSK; + ctrl |= hi32 << SATT2_CTRL_BR_BASE_ADDR_REG_SHIFT; + + mei_txe_br_reg_write(hw, SATT2_SAP_SIZE_REG, range); + mei_txe_br_reg_write(hw, SATT2_BRG_BA_LSB_REG, lo32); + mei_txe_br_reg_write(hw, SATT2_CTRL_REG, ctrl); + dev_dbg(&dev->pdev->dev, "SATT2: SAP_SIZE_OFFSET=0x%08X, BRG_BA_LSB_OFFSET=0x%08X, CTRL_OFFSET=0x%08X\n", + range, lo32, ctrl); + + return 0; +} diff --git a/drivers/misc/mei/hw-txe.h b/drivers/misc/mei/hw-txe.h new file mode 100644 index 000000000000..0812d98633a4 --- /dev/null +++ b/drivers/misc/mei/hw-txe.h @@ -0,0 +1,74 @@ +/* + * + * Intel Management Engine Interface (Intel MEI) Linux driver + * Copyright (c) 2013-2014, Intel Corporation. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + * + */ + +#ifndef _MEI_HW_TXE_H_ +#define _MEI_HW_TXE_H_ + +#include <linux/irqreturn.h> + +#include "hw.h" +#include "hw-txe-regs.h" + +/* Flatten Hierarchy interrupt cause */ +#define TXE_INTR_READINESS_BIT 0 /* HISR_INT_0_STS */ +#define TXE_INTR_READINESS HISR_INT_0_STS +#define TXE_INTR_ALIVENESS_BIT 1 /* HISR_INT_1_STS */ +#define TXE_INTR_ALIVENESS HISR_INT_1_STS +#define TXE_INTR_OUT_DB_BIT 2 /* HISR_INT_2_STS */ +#define TXE_INTR_OUT_DB HISR_INT_2_STS +#define TXE_INTR_IN_READY_BIT 8 /* beyond HISR */ +#define TXE_INTR_IN_READY BIT(8) + +/** + * struct mei_txe_hw - txe hardware specifics + * + * @mem_addr: SeC and BRIDGE bars + * @aliveness: aliveness (power gating) state of the hardware + * @readiness: readiness state of the hardware + * @wait_aliveness: aliveness wait queue + * @recvd_aliveness: aliveness interrupt was recived + * @intr_cause: translated interrupt cause + */ +struct mei_txe_hw { + void __iomem *mem_addr[NUM_OF_MEM_BARS]; + u32 aliveness; + u32 readiness; + u32 slots; + + wait_queue_head_t wait_aliveness; + bool recvd_aliveness; + + unsigned long intr_cause; +}; + +#define to_txe_hw(dev) (struct mei_txe_hw *)((dev)->hw) + +static inline struct mei_device *hw_txe_to_mei(struct mei_txe_hw *hw) +{ + return container_of((void *)hw, struct mei_device, hw); +} + +struct mei_device *mei_txe_dev_init(struct pci_dev *pdev); + +irqreturn_t mei_txe_irq_quick_handler(int irq, void *dev_id); +irqreturn_t mei_txe_irq_thread_handler(int irq, void *dev_id); + +int mei_txe_aliveness_set_sync(struct mei_device *dev, u32 req); + +int mei_txe_setup_satt2(struct mei_device *dev, phys_addr_t addr, u32 range); + + +#endif /* _MEI_HW_TXE_H_ */ diff --git a/drivers/misc/mei/hw.h b/drivers/misc/mei/hw.h index dd44e33ad2b6..6b476ab49b2e 100644 --- a/drivers/misc/mei/hw.h +++ b/drivers/misc/mei/hw.h @@ -22,7 +22,7 @@ /* * Timeouts in Seconds */ -#define MEI_INTEROP_TIMEOUT 7 /* Timeout on ready message */ +#define MEI_HW_READY_TIMEOUT 2 /* Timeout on ready message */ #define MEI_CONNECT_TIMEOUT 3 /* HPS: at least 2 seconds */ #define MEI_CL_CONNECT_TIMEOUT 15 /* HPS: Client Connect Timeout */ @@ -31,13 +31,13 @@ #define MEI_IAMTHIF_STALL_TIMER 12 /* HPS */ #define MEI_IAMTHIF_READ_TIMER 10 /* HPS */ +#define MEI_HBM_TIMEOUT 1 /* 1 second */ /* * MEI Version */ #define HBM_MINOR_VERSION 0 #define HBM_MAJOR_VERSION 1 -#define HBM_TIMEOUT 1 /* 1 second */ /* Host bus message command opcode */ #define MEI_HBM_CMD_OP_MSK 0x7f @@ -89,19 +89,19 @@ enum mei_stop_reason_types { * Client Connect Status * used by hbm_client_connect_response.status */ -enum client_connect_status_types { - CCS_SUCCESS = 0x00, - CCS_NOT_FOUND = 0x01, - CCS_ALREADY_STARTED = 0x02, - CCS_OUT_OF_RESOURCES = 0x03, - CCS_MESSAGE_SMALL = 0x04 +enum mei_cl_connect_status { + MEI_CL_CONN_SUCCESS = 0x00, + MEI_CL_CONN_NOT_FOUND = 0x01, + MEI_CL_CONN_ALREADY_STARTED = 0x02, + MEI_CL_CONN_OUT_OF_RESOURCES = 0x03, + MEI_CL_CONN_MESSAGE_SMALL = 0x04 }; /* * Client Disconnect Status */ -enum client_disconnect_status_types { - CDS_SUCCESS = 0x00 +enum mei_cl_disconnect_status { + MEI_CL_DISCONN_SUCCESS = 0x00 }; /* diff --git a/drivers/misc/mei/init.c b/drivers/misc/mei/init.c index cdd31c2a2a2b..4460975c0eef 100644 --- a/drivers/misc/mei/init.c +++ b/drivers/misc/mei/init.c @@ -116,7 +116,6 @@ int mei_reset(struct mei_device *dev) mei_cl_unlink(&dev->wd_cl); mei_cl_unlink(&dev->iamthif_cl); mei_amthif_reset_params(dev); - memset(&dev->wr_ext_msg, 0, sizeof(dev->wr_ext_msg)); } @@ -126,7 +125,6 @@ int mei_reset(struct mei_device *dev) if (ret) { dev_err(&dev->pdev->dev, "hw_reset failed ret = %d\n", ret); - dev->dev_state = MEI_DEV_DISABLED; return ret; } @@ -139,7 +137,6 @@ int mei_reset(struct mei_device *dev) ret = mei_hw_start(dev); if (ret) { dev_err(&dev->pdev->dev, "hw_start failed ret = %d\n", ret); - dev->dev_state = MEI_DEV_DISABLED; return ret; } @@ -149,7 +146,7 @@ int mei_reset(struct mei_device *dev) ret = mei_hbm_start_req(dev); if (ret) { dev_err(&dev->pdev->dev, "hbm_start failed ret = %d\n", ret); - dev->dev_state = MEI_DEV_DISABLED; + dev->dev_state = MEI_DEV_RESETTING; return ret; } @@ -166,6 +163,7 @@ EXPORT_SYMBOL_GPL(mei_reset); */ int mei_start(struct mei_device *dev) { + int ret; mutex_lock(&dev->device_lock); /* acknowledge interrupt and stop interrupts */ @@ -175,10 +173,18 @@ int mei_start(struct mei_device *dev) dev_dbg(&dev->pdev->dev, "reset in start the mei device.\n"); - dev->dev_state = MEI_DEV_INITIALIZING; dev->reset_count = 0; - mei_reset(dev); + do { + dev->dev_state = MEI_DEV_INITIALIZING; + ret = mei_reset(dev); + + if (ret == -ENODEV || dev->dev_state == MEI_DEV_DISABLED) { + dev_err(&dev->pdev->dev, "reset failed ret = %d", ret); + goto err; + } + } while (ret); + /* we cannot start the device w/o hbm start message completed */ if (dev->dev_state == MEI_DEV_DISABLED) { dev_err(&dev->pdev->dev, "reset failed"); goto err; @@ -238,27 +244,40 @@ int mei_restart(struct mei_device *dev) mutex_unlock(&dev->device_lock); - if (err || dev->dev_state == MEI_DEV_DISABLED) + if (err == -ENODEV || dev->dev_state == MEI_DEV_DISABLED) { + dev_err(&dev->pdev->dev, "device disabled = %d\n", err); return -ENODEV; + } + + /* try to start again */ + if (err) + schedule_work(&dev->reset_work); + return 0; } EXPORT_SYMBOL_GPL(mei_restart); - static void mei_reset_work(struct work_struct *work) { struct mei_device *dev = container_of(work, struct mei_device, reset_work); + int ret; mutex_lock(&dev->device_lock); - mei_reset(dev); + ret = mei_reset(dev); mutex_unlock(&dev->device_lock); - if (dev->dev_state == MEI_DEV_DISABLED) - dev_err(&dev->pdev->dev, "reset failed"); + if (dev->dev_state == MEI_DEV_DISABLED) { + dev_err(&dev->pdev->dev, "device disabled = %d\n", ret); + return; + } + + /* retry reset in case of failure */ + if (ret) + schedule_work(&dev->reset_work); } void mei_stop(struct mei_device *dev) @@ -269,6 +288,8 @@ void mei_stop(struct mei_device *dev) mei_nfc_host_exit(dev); + mei_cl_bus_remove_devices(dev); + mutex_lock(&dev->device_lock); mei_wd_stop(dev); diff --git a/drivers/misc/mei/interrupt.c b/drivers/misc/mei/interrupt.c index f0fbb5179f80..29b5af8efb71 100644 --- a/drivers/misc/mei/interrupt.c +++ b/drivers/misc/mei/interrupt.c @@ -26,7 +26,6 @@ #include "mei_dev.h" #include "hbm.h" -#include "hw-me.h" #include "client.h" @@ -161,29 +160,63 @@ static int mei_cl_irq_read_msg(struct mei_device *dev, } /** + * mei_cl_irq_disconnect_rsp - send disconnection response message + * + * @cl: client + * @cb: callback block. + * @cmpl_list: complete list. + * + * returns 0, OK; otherwise, error. + */ +static int mei_cl_irq_disconnect_rsp(struct mei_cl *cl, struct mei_cl_cb *cb, + struct mei_cl_cb *cmpl_list) +{ + struct mei_device *dev = cl->dev; + u32 msg_slots; + int slots; + int ret; + + slots = mei_hbuf_empty_slots(dev); + msg_slots = mei_data2slots(sizeof(struct hbm_client_connect_response)); + + if (slots < msg_slots) + return -EMSGSIZE; + + ret = mei_hbm_cl_disconnect_rsp(dev, cl); + + cl->state = MEI_FILE_DISCONNECTED; + cl->status = 0; + list_del(&cb->list); + mei_io_cb_free(cb); + + return ret; +} + + + +/** * mei_cl_irq_close - processes close related operation from * interrupt thread context - send disconnect request * * @cl: client * @cb: callback block. - * @slots: free slots. * @cmpl_list: complete list. * * returns 0, OK; otherwise, error. */ static int mei_cl_irq_close(struct mei_cl *cl, struct mei_cl_cb *cb, - s32 *slots, struct mei_cl_cb *cmpl_list) + struct mei_cl_cb *cmpl_list) { struct mei_device *dev = cl->dev; + u32 msg_slots; + int slots; - u32 msg_slots = - mei_data2slots(sizeof(struct hbm_client_connect_request)); + msg_slots = mei_data2slots(sizeof(struct hbm_client_connect_request)); + slots = mei_hbuf_empty_slots(dev); - if (*slots < msg_slots) + if (slots < msg_slots) return -EMSGSIZE; - *slots -= msg_slots; - if (mei_hbm_cl_disconnect_req(dev, cl)) { cl->status = 0; cb->buf_idx = 0; @@ -207,27 +240,23 @@ static int mei_cl_irq_close(struct mei_cl *cl, struct mei_cl_cb *cb, * * @cl: client * @cb: callback block. - * @slots: free slots. * @cmpl_list: complete list. * * returns 0, OK; otherwise, error. */ static int mei_cl_irq_read(struct mei_cl *cl, struct mei_cl_cb *cb, - s32 *slots, struct mei_cl_cb *cmpl_list) + struct mei_cl_cb *cmpl_list) { struct mei_device *dev = cl->dev; - u32 msg_slots = mei_data2slots(sizeof(struct hbm_flow_control)); - + u32 msg_slots; + int slots; int ret; + msg_slots = mei_data2slots(sizeof(struct hbm_flow_control)); + slots = mei_hbuf_empty_slots(dev); - if (*slots < msg_slots) { - /* return the cancel routine */ - list_del(&cb->list); + if (slots < msg_slots) return -EMSGSIZE; - } - - *slots -= msg_slots; ret = mei_hbm_cl_flow_control_req(dev, cl); if (ret) { @@ -244,32 +273,30 @@ static int mei_cl_irq_read(struct mei_cl *cl, struct mei_cl_cb *cb, /** - * mei_cl_irq_ioctl - processes client ioctl related operation from the - * interrupt thread context - send connection request + * mei_cl_irq_connect - send connect request in irq_thread context * * @cl: client * @cb: callback block. - * @slots: free slots. * @cmpl_list: complete list. * * returns 0, OK; otherwise, error. */ -static int mei_cl_irq_ioctl(struct mei_cl *cl, struct mei_cl_cb *cb, - s32 *slots, struct mei_cl_cb *cmpl_list) +static int mei_cl_irq_connect(struct mei_cl *cl, struct mei_cl_cb *cb, + struct mei_cl_cb *cmpl_list) { struct mei_device *dev = cl->dev; + u32 msg_slots; + int slots; int ret; - u32 msg_slots = - mei_data2slots(sizeof(struct hbm_client_connect_request)); + msg_slots = mei_data2slots(sizeof(struct hbm_client_connect_request)); + slots = mei_hbuf_empty_slots(dev); - if (*slots < msg_slots) { - /* return the cancel routine */ - list_del(&cb->list); - return -EMSGSIZE; - } + if (mei_cl_is_other_connecting(cl)) + return 0; - *slots -= msg_slots; + if (slots < msg_slots) + return -EMSGSIZE; cl->state = MEI_FILE_CONNECTING; @@ -323,7 +350,7 @@ int mei_irq_read_handler(struct mei_device *dev, dev_err(&dev->pdev->dev, "less data available than length=%08x.\n", *slots); /* we can't read the message */ - ret = -ERANGE; + ret = -ENODATA; goto end; } @@ -409,10 +436,10 @@ int mei_irq_write_handler(struct mei_device *dev, struct mei_cl_cb *cmpl_list) s32 slots; int ret; - if (!mei_hbuf_is_ready(dev)) { - dev_dbg(&dev->pdev->dev, "host buffer is not empty.\n"); + + if (!mei_hbuf_acquire(dev)) return 0; - } + slots = mei_hbuf_empty_slots(dev); if (slots <= 0) return -EMSGSIZE; @@ -447,29 +474,16 @@ int mei_irq_write_handler(struct mei_device *dev, struct mei_cl_cb *cmpl_list) if (dev->wd_state == MEI_WD_STOPPING) { dev->wd_state = MEI_WD_IDLE; - wake_up_interruptible(&dev->wait_stop_wd); + wake_up(&dev->wait_stop_wd); } - if (dev->wr_ext_msg.hdr.length) { - mei_write_message(dev, &dev->wr_ext_msg.hdr, - dev->wr_ext_msg.data); - slots -= mei_data2slots(dev->wr_ext_msg.hdr.length); - dev->wr_ext_msg.hdr.length = 0; - } - if (dev->dev_state == MEI_DEV_ENABLED) { + if (mei_cl_is_connected(&dev->wd_cl)) { if (dev->wd_pending && mei_cl_flow_ctrl_creds(&dev->wd_cl) > 0) { - if (mei_wd_send(dev)) - dev_dbg(&dev->pdev->dev, "wd send failed.\n"); - else if (mei_cl_flow_ctrl_reduce(&dev->wd_cl)) - return -ENODEV; - + ret = mei_wd_send(dev); + if (ret) + return ret; dev->wd_pending = false; - - if (dev->wd_state == MEI_WD_RUNNING) - slots -= mei_data2slots(MEI_WD_START_MSG_SIZE); - else - slots -= mei_data2slots(MEI_WD_STOP_MSG_SIZE); } } @@ -484,28 +498,31 @@ int mei_irq_write_handler(struct mei_device *dev, struct mei_cl_cb *cmpl_list) switch (cb->fop_type) { case MEI_FOP_CLOSE: /* send disconnect message */ - ret = mei_cl_irq_close(cl, cb, &slots, cmpl_list); + ret = mei_cl_irq_close(cl, cb, cmpl_list); if (ret) return ret; break; case MEI_FOP_READ: /* send flow control message */ - ret = mei_cl_irq_read(cl, cb, &slots, cmpl_list); + ret = mei_cl_irq_read(cl, cb, cmpl_list); if (ret) return ret; break; - case MEI_FOP_IOCTL: + case MEI_FOP_CONNECT: /* connect message */ - if (mei_cl_is_other_connecting(cl)) - continue; - ret = mei_cl_irq_ioctl(cl, cb, &slots, cmpl_list); + ret = mei_cl_irq_connect(cl, cb, cmpl_list); if (ret) return ret; break; - + case MEI_FOP_DISCONNECT_RSP: + /* send disconnect resp */ + ret = mei_cl_irq_disconnect_rsp(cl, cb, cmpl_list); + if (ret) + return ret; + break; default: BUG(); } @@ -518,11 +535,9 @@ int mei_irq_write_handler(struct mei_device *dev, struct mei_cl_cb *cmpl_list) if (cl == NULL) continue; if (cl == &dev->iamthif_cl) - ret = mei_amthif_irq_write_complete(cl, cb, - &slots, cmpl_list); + ret = mei_amthif_irq_write(cl, cb, cmpl_list); else - ret = mei_cl_irq_write_complete(cl, cb, - &slots, cmpl_list); + ret = mei_cl_irq_write(cl, cb, cmpl_list); if (ret) return ret; } @@ -541,8 +556,7 @@ EXPORT_SYMBOL_GPL(mei_irq_write_handler); void mei_timer(struct work_struct *work) { unsigned long timeout; - struct mei_cl *cl_pos = NULL; - struct mei_cl *cl_next = NULL; + struct mei_cl *cl; struct mei_cl_cb *cb_pos = NULL; struct mei_cl_cb *cb_next = NULL; @@ -570,9 +584,9 @@ void mei_timer(struct work_struct *work) goto out; /*** connect/disconnect timeouts ***/ - list_for_each_entry_safe(cl_pos, cl_next, &dev->file_list, link) { - if (cl_pos->timer_count) { - if (--cl_pos->timer_count == 0) { + list_for_each_entry(cl, &dev->file_list, link) { + if (cl->timer_count) { + if (--cl->timer_count == 0) { dev_err(&dev->pdev->dev, "timer: connect/disconnect timeout.\n"); mei_reset(dev); goto out; @@ -580,6 +594,9 @@ void mei_timer(struct work_struct *work) } } + if (!mei_cl_is_connected(&dev->iamthif_cl)) + goto out; + if (dev->iamthif_stall_timer) { if (--dev->iamthif_stall_timer == 0) { dev_err(&dev->pdev->dev, "timer: amthif hanged.\n"); @@ -619,10 +636,10 @@ void mei_timer(struct work_struct *work) list_for_each_entry_safe(cb_pos, cb_next, &dev->amthif_rd_complete_list.list, list) { - cl_pos = cb_pos->file_object->private_data; + cl = cb_pos->file_object->private_data; /* Finding the AMTHI entry. */ - if (cl_pos == &dev->iamthif_cl) + if (cl == &dev->iamthif_cl) list_del(&cb_pos->list); } mei_io_cb_free(dev->iamthif_current_cb); diff --git a/drivers/misc/mei/main.c b/drivers/misc/mei/main.c index 5424f8ff3f7f..b35594dbf52f 100644 --- a/drivers/misc/mei/main.c +++ b/drivers/misc/mei/main.c @@ -13,9 +13,6 @@ * more details. * */ - -#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt - #include <linux/module.h> #include <linux/moduleparam.h> #include <linux/kernel.h> @@ -40,7 +37,6 @@ #include <linux/mei.h> #include "mei_dev.h" -#include "hw-me.h" #include "client.h" /** @@ -129,17 +125,11 @@ static int mei_release(struct inode *inode, struct file *file) } if (cl->state == MEI_FILE_CONNECTED) { cl->state = MEI_FILE_DISCONNECTING; - dev_dbg(&dev->pdev->dev, - "disconnecting client host client = %d, " - "ME client = %d\n", - cl->host_client_id, - cl->me_client_id); + cl_dbg(dev, cl, "disconnecting\n"); rets = mei_cl_disconnect(cl); } mei_cl_flush_queues(cl); - dev_dbg(&dev->pdev->dev, "remove client host client = %d, ME client = %d\n", - cl->host_client_id, - cl->me_client_id); + cl_dbg(dev, cl, "removing\n"); mei_cl_unlink(cl); @@ -284,6 +274,7 @@ copy_buffer: length = min_t(size_t, length, cb->buf_idx - *offset); if (copy_to_user(ubuf, cb->response_buffer.data + *offset, length)) { + dev_dbg(&dev->pdev->dev, "failed to copy data to userland\n"); rets = -EFAULT; goto free; } @@ -340,7 +331,7 @@ static ssize_t mei_write(struct file *file, const char __user *ubuf, id = mei_me_cl_by_id(dev, cl->me_client_id); if (id < 0) { - rets = -ENODEV; + rets = -ENOTTY; goto out; } @@ -404,7 +395,7 @@ static ssize_t mei_write(struct file *file, const char __user *ubuf, rets = copy_from_user(write_cb->request_buffer.data, ubuf, length); if (rets) { - dev_err(&dev->pdev->dev, "failed to copy data from userland\n"); + dev_dbg(&dev->pdev->dev, "failed to copy data from userland\n"); rets = -EFAULT; goto out; } @@ -471,7 +462,7 @@ static int mei_ioctl_connect_client(struct file *file, if (i < 0 || dev->me_clients[i].props.fixed_address) { dev_dbg(&dev->pdev->dev, "Cannot connect to FW Client UUID = %pUl\n", &data->in_client_uuid); - rets = -ENODEV; + rets = -ENOTTY; goto end; } @@ -569,7 +560,7 @@ static long mei_ioctl(struct file *file, unsigned int cmd, unsigned long data) dev_dbg(&dev->pdev->dev, "copy connect data from user\n"); if (copy_from_user(connect_data, (char __user *)data, sizeof(struct mei_connect_client_data))) { - dev_err(&dev->pdev->dev, "failed to copy data from userland\n"); + dev_dbg(&dev->pdev->dev, "failed to copy data from userland\n"); rets = -EFAULT; goto out; } diff --git a/drivers/misc/mei/mei_dev.h b/drivers/misc/mei/mei_dev.h index f7de95b4cdd9..94a516716d22 100644 --- a/drivers/misc/mei/mei_dev.h +++ b/drivers/misc/mei/mei_dev.h @@ -24,7 +24,6 @@ #include <linux/mei_cl_bus.h> #include "hw.h" -#include "hw-me-regs.h" #include "hbm.h" /* @@ -130,16 +129,18 @@ enum mei_wd_states { /** * enum mei_cb_file_ops - file operation associated with the callback - * @MEI_FOP_READ - read - * @MEI_FOP_WRITE - write - * @MEI_FOP_IOCTL - ioctl - * @MEI_FOP_OPEN - open - * @MEI_FOP_CLOSE - close + * @MEI_FOP_READ - read + * @MEI_FOP_WRITE - write + * @MEI_FOP_CONNECT - connect + * @MEI_FOP_DISCONNECT_RSP - disconnect response + * @MEI_FOP_OPEN - open + * @MEI_FOP_CLOSE - close */ enum mei_cb_file_ops { MEI_FOP_READ = 0, MEI_FOP_WRITE, - MEI_FOP_IOCTL, + MEI_FOP_CONNECT, + MEI_FOP_DISCONNECT_RSP, MEI_FOP_OPEN, MEI_FOP_CLOSE }; @@ -236,20 +237,20 @@ struct mei_cl { */ struct mei_hw_ops { - bool (*host_is_ready) (struct mei_device *dev); + bool (*host_is_ready)(struct mei_device *dev); - bool (*hw_is_ready) (struct mei_device *dev); - int (*hw_reset) (struct mei_device *dev, bool enable); - int (*hw_start) (struct mei_device *dev); - void (*hw_config) (struct mei_device *dev); + bool (*hw_is_ready)(struct mei_device *dev); + int (*hw_reset)(struct mei_device *dev, bool enable); + int (*hw_start)(struct mei_device *dev); + void (*hw_config)(struct mei_device *dev); - void (*intr_clear) (struct mei_device *dev); - void (*intr_enable) (struct mei_device *dev); - void (*intr_disable) (struct mei_device *dev); + void (*intr_clear)(struct mei_device *dev); + void (*intr_enable)(struct mei_device *dev); + void (*intr_disable)(struct mei_device *dev); - int (*hbuf_free_slots) (struct mei_device *dev); - bool (*hbuf_is_ready) (struct mei_device *dev); - size_t (*hbuf_max_len) (const struct mei_device *dev); + int (*hbuf_free_slots)(struct mei_device *dev); + bool (*hbuf_is_ready)(struct mei_device *dev); + size_t (*hbuf_max_len)(const struct mei_device *dev); int (*write)(struct mei_device *dev, struct mei_msg_hdr *hdr, @@ -258,7 +259,7 @@ struct mei_hw_ops { int (*rdbuf_full_slots)(struct mei_device *dev); u32 (*read_hdr)(const struct mei_device *dev); - int (*read) (struct mei_device *dev, + int (*read)(struct mei_device *dev, unsigned char *buf, unsigned long len); }; @@ -294,6 +295,7 @@ int __mei_cl_async_send(struct mei_cl *cl, u8 *buf, size_t length); int __mei_cl_send(struct mei_cl *cl, u8 *buf, size_t length); int __mei_cl_recv(struct mei_cl *cl, u8 *buf, size_t length); void mei_cl_bus_rx_event(struct mei_cl *cl); +void mei_cl_bus_remove_devices(struct mei_device *dev); int mei_cl_bus_init(void); void mei_cl_bus_exit(void); @@ -339,7 +341,6 @@ struct mei_cl_device { * @hbuf_depth - depth of hardware host/write buffer is slots * @hbuf_is_ready - query if the host host/write buffer is ready * @wr_msg - the buffer for hbm control messages - * @wr_ext_msg - the buffer for hbm control responses (set in read cycle) */ struct mei_device { struct pci_dev *pdev; /* pointer to pci device struct */ @@ -394,11 +395,6 @@ struct mei_device { unsigned char data[128]; } wr_msg; - struct { - struct mei_msg_hdr hdr; - unsigned char data[4]; /* All HBM messages are 4 bytes */ - } wr_ext_msg; /* for control responses */ - struct hbm_version version; struct mei_me_client *me_clients; /* Note: memory has to be allocated */ @@ -518,8 +514,8 @@ struct mei_cl_cb *mei_amthif_find_read_list_entry(struct mei_device *dev, void mei_amthif_run_next_cmd(struct mei_device *dev); -int mei_amthif_irq_write_complete(struct mei_cl *cl, struct mei_cl_cb *cb, - s32 *slots, struct mei_cl_cb *cmpl_list); +int mei_amthif_irq_write(struct mei_cl *cl, struct mei_cl_cb *cb, + struct mei_cl_cb *cmpl_list); void mei_amthif_complete(struct mei_device *dev, struct mei_cl_cb *cb); int mei_amthif_irq_read_msg(struct mei_device *dev, @@ -546,7 +542,7 @@ int mei_wd_host_init(struct mei_device *dev); * once we got connection to the WD Client * @dev - mei device */ -void mei_watchdog_register(struct mei_device *dev); +int mei_watchdog_register(struct mei_device *dev); /* * mei_watchdog_unregister - Unregistering watchdog interface * @dev - mei device @@ -633,6 +629,8 @@ static inline int mei_count_full_read_slots(struct mei_device *dev) return dev->ops->rdbuf_full_slots(dev); } +bool mei_hbuf_acquire(struct mei_device *dev); + #if IS_ENABLED(CONFIG_DEBUG_FS) int mei_dbgfs_register(struct mei_device *dev, const char *name); void mei_dbgfs_deregister(struct mei_device *dev); diff --git a/drivers/misc/mei/nfc.c b/drivers/misc/mei/nfc.c index a58320c0c049..3095fc514a65 100644 --- a/drivers/misc/mei/nfc.c +++ b/drivers/misc/mei/nfc.c @@ -364,7 +364,7 @@ static int mei_nfc_send(struct mei_cl_device *cldev, u8 *buf, size_t length) if (!wait_event_interruptible_timeout(ndev->send_wq, ndev->recv_req_id == ndev->req_id, HZ)) { dev_err(&dev->pdev->dev, "NFC MEI command timeout\n"); - err = -ETIMEDOUT; + err = -ETIME; } else { ndev->req_id++; } @@ -502,7 +502,7 @@ int mei_nfc_host_init(struct mei_device *dev) i = mei_me_cl_by_uuid(dev, &mei_nfc_info_guid); if (i < 0) { dev_info(&dev->pdev->dev, "nfc: failed to find the client\n"); - ret = -ENOENT; + ret = -ENOTTY; goto err; } @@ -520,7 +520,7 @@ int mei_nfc_host_init(struct mei_device *dev) i = mei_me_cl_by_uuid(dev, &mei_nfc_guid); if (i < 0) { dev_info(&dev->pdev->dev, "nfc: failed to find the client\n"); - ret = -ENOENT; + ret = -ENOTTY; goto err; } @@ -552,13 +552,7 @@ err: void mei_nfc_host_exit(struct mei_device *dev) { struct mei_nfc_dev *ndev = &nfc_dev; - cancel_work_sync(&ndev->init_work); +} - mutex_lock(&dev->device_lock); - if (ndev->cl && ndev->cl->device) - mei_cl_remove_device(ndev->cl->device); - mei_nfc_free(ndev); - mutex_unlock(&dev->device_lock); -} diff --git a/drivers/misc/mei/pci-me.c b/drivers/misc/mei/pci-me.c index ddadd08956f4..1c8fd3a3e135 100644 --- a/drivers/misc/mei/pci-me.c +++ b/drivers/misc/mei/pci-me.c @@ -13,9 +13,6 @@ * more details. * */ - -#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt - #include <linux/module.h> #include <linux/moduleparam.h> #include <linux/kernel.h> @@ -27,7 +24,6 @@ #include <linux/aio.h> #include <linux/pci.h> #include <linux/poll.h> -#include <linux/init.h> #include <linux/ioctl.h> #include <linux/cdev.h> #include <linux/sched.h> @@ -40,11 +36,12 @@ #include <linux/mei.h> #include "mei_dev.h" -#include "hw-me.h" #include "client.h" +#include "hw-me-regs.h" +#include "hw-me.h" /* mei_pci_tbl - PCI Device ID Table */ -static DEFINE_PCI_DEVICE_TABLE(mei_me_pci_tbl) = { +static const struct pci_device_id mei_me_pci_tbl[] = { {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_82946GZ)}, {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_82G35)}, {PCI_DEVICE(PCI_VENDOR_ID_INTEL, MEI_DEV_ID_82Q965)}, @@ -270,7 +267,7 @@ static void mei_me_remove(struct pci_dev *pdev) } -#ifdef CONFIG_PM +#ifdef CONFIG_PM_SLEEP static int mei_me_pci_suspend(struct device *device) { struct pci_dev *pdev = to_pci_dev(device); @@ -330,11 +327,12 @@ static int mei_me_pci_resume(struct device *device) return 0; } + static SIMPLE_DEV_PM_OPS(mei_me_pm_ops, mei_me_pci_suspend, mei_me_pci_resume); #define MEI_ME_PM_OPS (&mei_me_pm_ops) #else #define MEI_ME_PM_OPS NULL -#endif /* CONFIG_PM */ +#endif /* CONFIG_PM_SLEEP */ /* * PCI driver structure */ diff --git a/drivers/misc/mei/pci-txe.c b/drivers/misc/mei/pci-txe.c new file mode 100644 index 000000000000..ad3adb009a1e --- /dev/null +++ b/drivers/misc/mei/pci-txe.c @@ -0,0 +1,293 @@ +/* + * + * Intel Management Engine Interface (Intel MEI) Linux driver + * Copyright (c) 2013-2014, Intel Corporation. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + * + */ + +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/device.h> +#include <linux/fs.h> +#include <linux/errno.h> +#include <linux/types.h> +#include <linux/pci.h> +#include <linux/init.h> +#include <linux/sched.h> +#include <linux/uuid.h> +#include <linux/jiffies.h> +#include <linux/interrupt.h> +#include <linux/workqueue.h> + +#include <linux/mei.h> + + +#include "mei_dev.h" +#include "hw-txe.h" + +static const struct pci_device_id mei_txe_pci_tbl[] = { + {PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x0F18)}, /* Baytrail */ + {0, } +}; +MODULE_DEVICE_TABLE(pci, mei_txe_pci_tbl); + + +static void mei_txe_pci_iounmap(struct pci_dev *pdev, struct mei_txe_hw *hw) +{ + int i; + for (i = SEC_BAR; i < NUM_OF_MEM_BARS; i++) { + if (hw->mem_addr[i]) { + pci_iounmap(pdev, hw->mem_addr[i]); + hw->mem_addr[i] = NULL; + } + } +} +/** + * mei_probe - Device Initialization Routine + * + * @pdev: PCI device structure + * @ent: entry in mei_txe_pci_tbl + * + * returns 0 on success, <0 on failure. + */ +static int mei_txe_probe(struct pci_dev *pdev, const struct pci_device_id *ent) +{ + struct mei_device *dev; + struct mei_txe_hw *hw; + int err; + int i; + + /* enable pci dev */ + err = pci_enable_device(pdev); + if (err) { + dev_err(&pdev->dev, "failed to enable pci device.\n"); + goto end; + } + /* set PCI host mastering */ + pci_set_master(pdev); + /* pci request regions for mei driver */ + err = pci_request_regions(pdev, KBUILD_MODNAME); + if (err) { + dev_err(&pdev->dev, "failed to get pci regions.\n"); + goto disable_device; + } + + err = pci_set_dma_mask(pdev, DMA_BIT_MASK(36)); + if (err) { + err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32)); + if (err) { + dev_err(&pdev->dev, "No suitable DMA available.\n"); + goto release_regions; + } + } + + /* allocates and initializes the mei dev structure */ + dev = mei_txe_dev_init(pdev); + if (!dev) { + err = -ENOMEM; + goto release_regions; + } + hw = to_txe_hw(dev); + + /* mapping IO device memory */ + for (i = SEC_BAR; i < NUM_OF_MEM_BARS; i++) { + hw->mem_addr[i] = pci_iomap(pdev, i, 0); + if (!hw->mem_addr[i]) { + dev_err(&pdev->dev, "mapping I/O device memory failure.\n"); + err = -ENOMEM; + goto free_device; + } + } + + + pci_enable_msi(pdev); + + /* clear spurious interrupts */ + mei_clear_interrupts(dev); + + /* request and enable interrupt */ + if (pci_dev_msi_enabled(pdev)) + err = request_threaded_irq(pdev->irq, + NULL, + mei_txe_irq_thread_handler, + IRQF_ONESHOT, KBUILD_MODNAME, dev); + else + err = request_threaded_irq(pdev->irq, + mei_txe_irq_quick_handler, + mei_txe_irq_thread_handler, + IRQF_SHARED, KBUILD_MODNAME, dev); + if (err) { + dev_err(&pdev->dev, "mei: request_threaded_irq failure. irq = %d\n", + pdev->irq); + goto free_device; + } + + if (mei_start(dev)) { + dev_err(&pdev->dev, "init hw failure.\n"); + err = -ENODEV; + goto release_irq; + } + + err = mei_register(dev); + if (err) + goto release_irq; + + pci_set_drvdata(pdev, dev); + + return 0; + +release_irq: + + mei_cancel_work(dev); + + /* disable interrupts */ + mei_disable_interrupts(dev); + + free_irq(pdev->irq, dev); + pci_disable_msi(pdev); + +free_device: + mei_txe_pci_iounmap(pdev, hw); + + kfree(dev); +release_regions: + pci_release_regions(pdev); +disable_device: + pci_disable_device(pdev); +end: + dev_err(&pdev->dev, "initialization failed.\n"); + return err; +} + +/** + * mei_remove - Device Removal Routine + * + * @pdev: PCI device structure + * + * mei_remove is called by the PCI subsystem to alert the driver + * that it should release a PCI device. + */ +static void mei_txe_remove(struct pci_dev *pdev) +{ + struct mei_device *dev; + struct mei_txe_hw *hw; + + dev = pci_get_drvdata(pdev); + if (!dev) { + dev_err(&pdev->dev, "mei: dev =NULL\n"); + return; + } + + hw = to_txe_hw(dev); + + mei_stop(dev); + + /* disable interrupts */ + mei_disable_interrupts(dev); + free_irq(pdev->irq, dev); + pci_disable_msi(pdev); + + pci_set_drvdata(pdev, NULL); + + mei_txe_pci_iounmap(pdev, hw); + + mei_deregister(dev); + + kfree(dev); + + pci_release_regions(pdev); + pci_disable_device(pdev); +} + + +#ifdef CONFIG_PM_SLEEP +static int mei_txe_pci_suspend(struct device *device) +{ + struct pci_dev *pdev = to_pci_dev(device); + struct mei_device *dev = pci_get_drvdata(pdev); + + if (!dev) + return -ENODEV; + + dev_dbg(&pdev->dev, "suspend\n"); + + mei_stop(dev); + + mei_disable_interrupts(dev); + + free_irq(pdev->irq, dev); + pci_disable_msi(pdev); + + return 0; +} + +static int mei_txe_pci_resume(struct device *device) +{ + struct pci_dev *pdev = to_pci_dev(device); + struct mei_device *dev; + int err; + + dev = pci_get_drvdata(pdev); + if (!dev) + return -ENODEV; + + pci_enable_msi(pdev); + + mei_clear_interrupts(dev); + + /* request and enable interrupt */ + if (pci_dev_msi_enabled(pdev)) + err = request_threaded_irq(pdev->irq, + NULL, + mei_txe_irq_thread_handler, + IRQF_ONESHOT, KBUILD_MODNAME, dev); + else + err = request_threaded_irq(pdev->irq, + mei_txe_irq_quick_handler, + mei_txe_irq_thread_handler, + IRQF_SHARED, KBUILD_MODNAME, dev); + if (err) { + dev_err(&pdev->dev, "request_threaded_irq failed: irq = %d.\n", + pdev->irq); + return err; + } + + err = mei_restart(dev); + + return err; +} + +static SIMPLE_DEV_PM_OPS(mei_txe_pm_ops, + mei_txe_pci_suspend, + mei_txe_pci_resume); + +#define MEI_TXE_PM_OPS (&mei_txe_pm_ops) +#else +#define MEI_TXE_PM_OPS NULL +#endif /* CONFIG_PM_SLEEP */ +/* + * PCI driver structure + */ +static struct pci_driver mei_txe_driver = { + .name = KBUILD_MODNAME, + .id_table = mei_txe_pci_tbl, + .probe = mei_txe_probe, + .remove = mei_txe_remove, + .shutdown = mei_txe_remove, + .driver.pm = MEI_TXE_PM_OPS, +}; + +module_pci_driver(mei_txe_driver); + +MODULE_AUTHOR("Intel Corporation"); +MODULE_DESCRIPTION("Intel(R) Trusted Execution Environment Interface"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/misc/mei/wd.c b/drivers/misc/mei/wd.c index f70945ed96f6..ebf1cbc198fd 100644 --- a/drivers/misc/mei/wd.c +++ b/drivers/misc/mei/wd.c @@ -25,7 +25,6 @@ #include "mei_dev.h" #include "hbm.h" -#include "hw-me.h" #include "client.h" static const u8 mei_start_wd_params[] = { 0x02, 0x12, 0x13, 0x10 }; @@ -53,7 +52,7 @@ static void mei_wd_set_start_timeout(struct mei_device *dev, u16 timeout) * * @dev: the device structure * - * returns -ENENT if wd client cannot be found + * returns -ENOTTY if wd client cannot be found * -EIO if write has failed * 0 on success */ @@ -73,7 +72,7 @@ int mei_wd_host_init(struct mei_device *dev) id = mei_me_cl_by_uuid(dev, &mei_wd_guid); if (id < 0) { dev_info(&dev->pdev->dev, "wd: failed to find the client\n"); - return id; + return -ENOTTY; } cl->me_client_id = dev->me_clients[id].client_id; @@ -87,15 +86,20 @@ int mei_wd_host_init(struct mei_device *dev) cl->state = MEI_FILE_CONNECTING; - if (mei_hbm_cl_connect_req(dev, cl)) { - dev_err(&dev->pdev->dev, "wd: failed to connect to the client\n"); - cl->state = MEI_FILE_DISCONNECTED; - cl->host_client_id = 0; - return -EIO; + ret = mei_cl_connect(cl, NULL); + + if (ret) { + dev_err(&dev->pdev->dev, "wd: failed to connect = %d\n", ret); + mei_cl_unlink(cl); + return ret; } - cl->timer_count = MEI_CONNECT_TIMEOUT; - return 0; + ret = mei_watchdog_register(dev); + if (ret) { + mei_cl_disconnect(cl); + mei_cl_unlink(cl); + } + return ret; } /** @@ -106,13 +110,16 @@ int mei_wd_host_init(struct mei_device *dev) * returns 0 if success, * -EIO when message send fails * -EINVAL when invalid message is to be sent + * -ENODEV on flow control failure */ int mei_wd_send(struct mei_device *dev) { + struct mei_cl *cl = &dev->wd_cl; struct mei_msg_hdr hdr; + int ret; - hdr.host_addr = dev->wd_cl.host_client_id; - hdr.me_addr = dev->wd_cl.me_client_id; + hdr.host_addr = cl->host_client_id; + hdr.me_addr = cl->me_client_id; hdr.msg_complete = 1; hdr.reserved = 0; hdr.internal = 0; @@ -121,10 +128,24 @@ int mei_wd_send(struct mei_device *dev) hdr.length = MEI_WD_START_MSG_SIZE; else if (!memcmp(dev->wd_data, mei_stop_wd_params, MEI_WD_HDR_SIZE)) hdr.length = MEI_WD_STOP_MSG_SIZE; - else + else { + dev_err(&dev->pdev->dev, "wd: invalid message is to be sent, aborting\n"); return -EINVAL; + } - return mei_write_message(dev, &hdr, dev->wd_data); + ret = mei_write_message(dev, &hdr, dev->wd_data); + if (ret) { + dev_err(&dev->pdev->dev, "wd: write message failed\n"); + return ret; + } + + ret = mei_cl_flow_ctrl_reduce(cl); + if (ret) { + dev_err(&dev->pdev->dev, "wd: flow_ctrl_reduce failed.\n"); + return ret; + } + + return 0; } /** @@ -133,9 +154,11 @@ int mei_wd_send(struct mei_device *dev) * @dev: the device structure * @preserve: indicate if to keep the timeout value * - * returns 0 if success, - * -EIO when message send fails + * returns 0 if success + * on error: + * -EIO when message send fails * -EINVAL when invalid message is to be sent + * -ETIME on message timeout */ int mei_wd_stop(struct mei_device *dev) { @@ -151,20 +174,12 @@ int mei_wd_stop(struct mei_device *dev) ret = mei_cl_flow_ctrl_creds(&dev->wd_cl); if (ret < 0) - goto out; - - if (ret && dev->hbuf_is_ready) { - ret = 0; - dev->hbuf_is_ready = false; - - if (!mei_wd_send(dev)) { - ret = mei_cl_flow_ctrl_reduce(&dev->wd_cl); - if (ret) - goto out; - } else { - dev_err(&dev->pdev->dev, "wd: send stop failed\n"); - } + goto err; + if (ret && mei_hbuf_acquire(dev)) { + ret = mei_wd_send(dev); + if (ret) + goto err; dev->wd_pending = false; } else { dev->wd_pending = true; @@ -172,21 +187,21 @@ int mei_wd_stop(struct mei_device *dev) mutex_unlock(&dev->device_lock); - ret = wait_event_interruptible_timeout(dev->wait_stop_wd, - dev->wd_state == MEI_WD_IDLE, - msecs_to_jiffies(MEI_WD_STOP_TIMEOUT)); + ret = wait_event_timeout(dev->wait_stop_wd, + dev->wd_state == MEI_WD_IDLE, + msecs_to_jiffies(MEI_WD_STOP_TIMEOUT)); mutex_lock(&dev->device_lock); - if (dev->wd_state == MEI_WD_IDLE) { - dev_dbg(&dev->pdev->dev, "wd: stop completed ret=%d.\n", ret); - ret = 0; - } else { - if (!ret) - ret = -ETIMEDOUT; + if (dev->wd_state != MEI_WD_IDLE) { + /* timeout */ + ret = -ETIME; dev_warn(&dev->pdev->dev, "wd: stop failed to complete ret=%d.\n", ret); + goto err; } - -out: + dev_dbg(&dev->pdev->dev, "wd: stop completed after %u msec\n", + MEI_WD_STOP_TIMEOUT - jiffies_to_msecs(ret)); + return 0; +err: return ret; } @@ -260,8 +275,8 @@ static int mei_wd_ops_stop(struct watchdog_device *wd_dev) */ static int mei_wd_ops_ping(struct watchdog_device *wd_dev) { - int ret = 0; struct mei_device *dev; + int ret; dev = watchdog_get_drvdata(wd_dev); if (!dev) @@ -277,25 +292,18 @@ static int mei_wd_ops_ping(struct watchdog_device *wd_dev) dev->wd_state = MEI_WD_RUNNING; + ret = mei_cl_flow_ctrl_creds(&dev->wd_cl); + if (ret < 0) + goto end; /* Check if we can send the ping to HW*/ - if (dev->hbuf_is_ready && mei_cl_flow_ctrl_creds(&dev->wd_cl) > 0) { + if (ret && mei_hbuf_acquire(dev)) { - dev->hbuf_is_ready = false; dev_dbg(&dev->pdev->dev, "wd: sending ping\n"); - if (mei_wd_send(dev)) { - dev_err(&dev->pdev->dev, "wd: send failed.\n"); - ret = -EIO; + ret = mei_wd_send(dev); + if (ret) goto end; - } - - if (mei_cl_flow_ctrl_reduce(&dev->wd_cl)) { - dev_err(&dev->pdev->dev, - "wd: mei_cl_flow_ctrl_reduce() failed.\n"); - ret = -EIO; - goto end; - } - + dev->wd_pending = false; } else { dev->wd_pending = true; } @@ -363,17 +371,25 @@ static struct watchdog_device amt_wd_dev = { }; -void mei_watchdog_register(struct mei_device *dev) +int mei_watchdog_register(struct mei_device *dev) { - if (watchdog_register_device(&amt_wd_dev)) { - dev_err(&dev->pdev->dev, - "wd: unable to register watchdog device.\n"); - return; + + int ret; + + /* unlock to perserve correct locking order */ + mutex_unlock(&dev->device_lock); + ret = watchdog_register_device(&amt_wd_dev); + mutex_lock(&dev->device_lock); + if (ret) { + dev_err(&dev->pdev->dev, "wd: unable to register watchdog device = %d.\n", + ret); + return ret; } dev_dbg(&dev->pdev->dev, "wd: successfully register watchdog interface.\n"); watchdog_set_drvdata(&amt_wd_dev, dev); + return 0; } void mei_watchdog_unregister(struct mei_device *dev) diff --git a/drivers/misc/mic/host/mic_intr.c b/drivers/misc/mic/host/mic_intr.c index f9c29bc918bc..dbc5afde1392 100644 --- a/drivers/misc/mic/host/mic_intr.c +++ b/drivers/misc/mic/host/mic_intr.c @@ -194,7 +194,7 @@ static int mic_setup_msix(struct mic_device *mdev, struct pci_dev *pdev) for (i = 0; i < MIC_MIN_MSIX; i++) mdev->irq_info.msix_entries[i].entry = i; - rc = pci_enable_msix(pdev, mdev->irq_info.msix_entries, + rc = pci_enable_msix_exact(pdev, mdev->irq_info.msix_entries, MIC_MIN_MSIX); if (rc) { dev_dbg(&pdev->dev, "Error enabling MSIx. rc = %d\n", rc); diff --git a/drivers/misc/pch_phub.c b/drivers/misc/pch_phub.c index a5925f7f17f6..956597321d2a 100644 --- a/drivers/misc/pch_phub.c +++ b/drivers/misc/pch_phub.c @@ -636,6 +636,7 @@ static ssize_t store_pch_mac(struct device *dev, struct device_attribute *attr, u8 mac[ETH_ALEN]; ssize_t rom_size; struct pch_phub_reg *chip = dev_get_drvdata(dev); + int ret; if (!mac_pton(buf, mac)) return -EINVAL; @@ -644,8 +645,10 @@ static ssize_t store_pch_mac(struct device *dev, struct device_attribute *attr, if (!chip->pch_phub_extrom_base_address) return -ENOMEM; - pch_phub_write_gbe_mac_addr(chip, mac); + ret = pch_phub_write_gbe_mac_addr(chip, mac); pci_unmap_rom(chip->pdev, chip->pch_phub_extrom_base_address); + if (ret) + return ret; return count; } diff --git a/drivers/misc/sram.c b/drivers/misc/sram.c index afe66571ce0b..21181fa243df 100644 --- a/drivers/misc/sram.c +++ b/drivers/misc/sram.c @@ -24,6 +24,9 @@ #include <linux/err.h> #include <linux/io.h> #include <linux/of.h> +#include <linux/of_address.h> +#include <linux/list.h> +#include <linux/list_sort.h> #include <linux/platform_device.h> #include <linux/slab.h> #include <linux/spinlock.h> @@ -36,14 +39,35 @@ struct sram_dev { struct clk *clk; }; +struct sram_reserve { + struct list_head list; + u32 start; + u32 size; +}; + +static int sram_reserve_cmp(void *priv, struct list_head *a, + struct list_head *b) +{ + struct sram_reserve *ra = list_entry(a, struct sram_reserve, list); + struct sram_reserve *rb = list_entry(b, struct sram_reserve, list); + + return ra->start - rb->start; +} + static int sram_probe(struct platform_device *pdev) { void __iomem *virt_base; struct sram_dev *sram; struct resource *res; - unsigned long size; + struct device_node *np = pdev->dev.of_node, *child; + unsigned long size, cur_start, cur_size; + struct sram_reserve *rblocks, *block; + struct list_head reserve_list; + unsigned int nblocks; int ret; + INIT_LIST_HEAD(&reserve_list); + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); virt_base = devm_ioremap_resource(&pdev->dev, res); if (IS_ERR(virt_base)) @@ -65,19 +89,106 @@ static int sram_probe(struct platform_device *pdev) if (!sram->pool) return -ENOMEM; - ret = gen_pool_add_virt(sram->pool, (unsigned long)virt_base, - res->start, size, -1); - if (ret < 0) { - if (sram->clk) - clk_disable_unprepare(sram->clk); - return ret; + /* + * We need an additional block to mark the end of the memory region + * after the reserved blocks from the dt are processed. + */ + nblocks = (np) ? of_get_available_child_count(np) + 1 : 1; + rblocks = kmalloc((nblocks) * sizeof(*rblocks), GFP_KERNEL); + if (!rblocks) { + ret = -ENOMEM; + goto err_alloc; + } + + block = &rblocks[0]; + for_each_available_child_of_node(np, child) { + struct resource child_res; + + ret = of_address_to_resource(child, 0, &child_res); + if (ret < 0) { + dev_err(&pdev->dev, + "could not get address for node %s\n", + child->full_name); + goto err_chunks; + } + + if (child_res.start < res->start || child_res.end > res->end) { + dev_err(&pdev->dev, + "reserved block %s outside the sram area\n", + child->full_name); + ret = -EINVAL; + goto err_chunks; + } + + block->start = child_res.start - res->start; + block->size = resource_size(&child_res); + list_add_tail(&block->list, &reserve_list); + + dev_dbg(&pdev->dev, "found reserved block 0x%x-0x%x\n", + block->start, + block->start + block->size); + + block++; + } + + /* the last chunk marks the end of the region */ + rblocks[nblocks - 1].start = size; + rblocks[nblocks - 1].size = 0; + list_add_tail(&rblocks[nblocks - 1].list, &reserve_list); + + list_sort(NULL, &reserve_list, sram_reserve_cmp); + + cur_start = 0; + + list_for_each_entry(block, &reserve_list, list) { + /* can only happen if sections overlap */ + if (block->start < cur_start) { + dev_err(&pdev->dev, + "block at 0x%x starts after current offset 0x%lx\n", + block->start, cur_start); + ret = -EINVAL; + goto err_chunks; + } + + /* current start is in a reserved block, so continue after it */ + if (block->start == cur_start) { + cur_start = block->start + block->size; + continue; + } + + /* + * allocate the space between the current starting + * address and the following reserved block, or the + * end of the region. + */ + cur_size = block->start - cur_start; + + dev_dbg(&pdev->dev, "adding chunk 0x%lx-0x%lx\n", + cur_start, cur_start + cur_size); + ret = gen_pool_add_virt(sram->pool, + (unsigned long)virt_base + cur_start, + res->start + cur_start, cur_size, -1); + if (ret < 0) + goto err_chunks; + + /* next allocation after this reserved block */ + cur_start = block->start + block->size; } + kfree(rblocks); + platform_set_drvdata(pdev, sram); dev_dbg(&pdev->dev, "SRAM pool: %ld KiB @ 0x%p\n", size / 1024, virt_base); return 0; + +err_chunks: + kfree(rblocks); +err_alloc: + if (sram->clk) + clk_disable_unprepare(sram->clk); + return ret; } static int sram_remove(struct platform_device *pdev) @@ -87,8 +198,6 @@ static int sram_remove(struct platform_device *pdev) if (gen_pool_avail(sram->pool) < gen_pool_size(sram->pool)) dev_dbg(&pdev->dev, "removed while SRAM allocated\n"); - gen_pool_destroy(sram->pool); - if (sram->clk) clk_disable_unprepare(sram->clk); diff --git a/drivers/misc/ti-st/st_core.c b/drivers/misc/ti-st/st_core.c index 3aed525e55b4..1972d57aadb3 100644 --- a/drivers/misc/ti-st/st_core.c +++ b/drivers/misc/ti-st/st_core.c @@ -22,7 +22,6 @@ #define pr_fmt(fmt) "(stc): " fmt #include <linux/module.h> #include <linux/kernel.h> -#include <linux/init.h> #include <linux/tty.h> #include <linux/seq_file.h> diff --git a/drivers/misc/ti_dac7512.c b/drivers/misc/ti_dac7512.c index 83da711ce9f1..cb0289b44a17 100644 --- a/drivers/misc/ti_dac7512.c +++ b/drivers/misc/ti_dac7512.c @@ -20,7 +20,6 @@ */ #include <linux/module.h> -#include <linux/init.h> #include <linux/spi/spi.h> #include <linux/of.h> diff --git a/drivers/misc/tsl2550.c b/drivers/misc/tsl2550.c index 5bc10fa193de..b00335652e52 100644 --- a/drivers/misc/tsl2550.c +++ b/drivers/misc/tsl2550.c @@ -20,7 +20,6 @@ */ #include <linux/module.h> -#include <linux/init.h> #include <linux/slab.h> #include <linux/i2c.h> #include <linux/mutex.h> diff --git a/drivers/misc/vmw_vmci/vmci_guest.c b/drivers/misc/vmw_vmci/vmci_guest.c index d35cda06b5e8..e0d5017785e5 100644 --- a/drivers/misc/vmw_vmci/vmci_guest.c +++ b/drivers/misc/vmw_vmci/vmci_guest.c @@ -383,11 +383,12 @@ static int vmci_enable_msix(struct pci_dev *pdev, vmci_dev->msix_entries[i].vector = i; } - result = pci_enable_msix(pdev, vmci_dev->msix_entries, VMCI_MAX_INTRS); + result = pci_enable_msix_exact(pdev, + vmci_dev->msix_entries, VMCI_MAX_INTRS); if (result == 0) vmci_dev->exclusive_vectors = true; - else if (result > 0) - result = pci_enable_msix(pdev, vmci_dev->msix_entries, 1); + else if (result == -ENOSPC) + result = pci_enable_msix_exact(pdev, vmci_dev->msix_entries, 1); return result; } diff --git a/drivers/mtd/nand/Kconfig b/drivers/mtd/nand/Kconfig index 90ff447bf043..a4bee41ad5cb 100644 --- a/drivers/mtd/nand/Kconfig +++ b/drivers/mtd/nand/Kconfig @@ -428,6 +428,7 @@ config MTD_NAND_FSL_IFC tristate "NAND support for Freescale IFC controller" depends on MTD_NAND && FSL_SOC select FSL_IFC + select MEMORY help Various Freescale chips e.g P1010, include a NAND Flash machine with built-in hardware ECC capabilities. diff --git a/drivers/mtd/nand/fsl_ifc_nand.c b/drivers/mtd/nand/fsl_ifc_nand.c index 90ca7e75d6f0..50d9161c4faf 100644 --- a/drivers/mtd/nand/fsl_ifc_nand.c +++ b/drivers/mtd/nand/fsl_ifc_nand.c @@ -30,7 +30,7 @@ #include <linux/mtd/nand.h> #include <linux/mtd/partitions.h> #include <linux/mtd/nand_ecc.h> -#include <asm/fsl_ifc.h> +#include <linux/fsl_ifc.h> #define FSL_IFC_V1_1_0 0x01010000 #define ERR_BYTE 0xFF /* Value returned for read diff --git a/drivers/parport/share.c b/drivers/parport/share.c index 6a83ee1e9178..3fa66244ce32 100644 --- a/drivers/parport/share.c +++ b/drivers/parport/share.c @@ -905,7 +905,8 @@ int parport_claim_or_block(struct pardevice *dev) /* If dev->waiting is clear now, an interrupt gave us the port and we would deadlock if we slept. */ if (dev->waiting) { - interruptible_sleep_on (&dev->wait_q); + wait_event_interruptible(dev->wait_q, + !dev->waiting); if (signal_pending (current)) { return -EINTR; } diff --git a/drivers/spmi/Kconfig b/drivers/spmi/Kconfig new file mode 100644 index 000000000000..bf1295e19f89 --- /dev/null +++ b/drivers/spmi/Kconfig @@ -0,0 +1,27 @@ +# +# SPMI driver configuration +# +menuconfig SPMI + tristate "SPMI support" + help + SPMI (System Power Management Interface) is a two-wire + serial interface between baseband and application processors + and Power Management Integrated Circuits (PMIC). + +if SPMI + +config SPMI_MSM_PMIC_ARB + tristate "Qualcomm MSM SPMI Controller (PMIC Arbiter)" + depends on ARM + depends on IRQ_DOMAIN + depends on ARCH_QCOM || COMPILE_TEST + default ARCH_QCOM + help + If you say yes to this option, support will be included for the + built-in SPMI PMIC Arbiter interface on Qualcomm MSM family + processors. + + This is required for communicating with Qualcomm PMICs and + other devices that have the SPMI interface. + +endif diff --git a/drivers/spmi/Makefile b/drivers/spmi/Makefile new file mode 100644 index 000000000000..fc75104a5aab --- /dev/null +++ b/drivers/spmi/Makefile @@ -0,0 +1,6 @@ +# +# Makefile for kernel SPMI framework. +# +obj-$(CONFIG_SPMI) += spmi.o + +obj-$(CONFIG_SPMI_MSM_PMIC_ARB) += spmi-pmic-arb.o diff --git a/drivers/spmi/spmi-pmic-arb.c b/drivers/spmi/spmi-pmic-arb.c new file mode 100644 index 000000000000..246e03a18c94 --- /dev/null +++ b/drivers/spmi/spmi-pmic-arb.c @@ -0,0 +1,778 @@ +/* Copyright (c) 2012-2013, The Linux Foundation. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 and + * only version 2 as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ +#include <linux/delay.h> +#include <linux/err.h> +#include <linux/interrupt.h> +#include <linux/io.h> +#include <linux/irqchip/chained_irq.h> +#include <linux/irqdomain.h> +#include <linux/irq.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/platform_device.h> +#include <linux/slab.h> +#include <linux/spmi.h> + +/* PMIC Arbiter configuration registers */ +#define PMIC_ARB_VERSION 0x0000 +#define PMIC_ARB_INT_EN 0x0004 + +/* PMIC Arbiter channel registers */ +#define PMIC_ARB_CMD(N) (0x0800 + (0x80 * (N))) +#define PMIC_ARB_CONFIG(N) (0x0804 + (0x80 * (N))) +#define PMIC_ARB_STATUS(N) (0x0808 + (0x80 * (N))) +#define PMIC_ARB_WDATA0(N) (0x0810 + (0x80 * (N))) +#define PMIC_ARB_WDATA1(N) (0x0814 + (0x80 * (N))) +#define PMIC_ARB_RDATA0(N) (0x0818 + (0x80 * (N))) +#define PMIC_ARB_RDATA1(N) (0x081C + (0x80 * (N))) + +/* Interrupt Controller */ +#define SPMI_PIC_OWNER_ACC_STATUS(M, N) (0x0000 + ((32 * (M)) + (4 * (N)))) +#define SPMI_PIC_ACC_ENABLE(N) (0x0200 + (4 * (N))) +#define SPMI_PIC_IRQ_STATUS(N) (0x0600 + (4 * (N))) +#define SPMI_PIC_IRQ_CLEAR(N) (0x0A00 + (4 * (N))) + +/* Mapping Table */ +#define SPMI_MAPPING_TABLE_REG(N) (0x0B00 + (4 * (N))) +#define SPMI_MAPPING_BIT_INDEX(X) (((X) >> 18) & 0xF) +#define SPMI_MAPPING_BIT_IS_0_FLAG(X) (((X) >> 17) & 0x1) +#define SPMI_MAPPING_BIT_IS_0_RESULT(X) (((X) >> 9) & 0xFF) +#define SPMI_MAPPING_BIT_IS_1_FLAG(X) (((X) >> 8) & 0x1) +#define SPMI_MAPPING_BIT_IS_1_RESULT(X) (((X) >> 0) & 0xFF) + +#define SPMI_MAPPING_TABLE_LEN 255 +#define SPMI_MAPPING_TABLE_TREE_DEPTH 16 /* Maximum of 16-bits */ + +/* Ownership Table */ +#define SPMI_OWNERSHIP_TABLE_REG(N) (0x0700 + (4 * (N))) +#define SPMI_OWNERSHIP_PERIPH2OWNER(X) ((X) & 0x7) + +/* Channel Status fields */ +enum pmic_arb_chnl_status { + PMIC_ARB_STATUS_DONE = (1 << 0), + PMIC_ARB_STATUS_FAILURE = (1 << 1), + PMIC_ARB_STATUS_DENIED = (1 << 2), + PMIC_ARB_STATUS_DROPPED = (1 << 3), +}; + +/* Command register fields */ +#define PMIC_ARB_CMD_MAX_BYTE_COUNT 8 + +/* Command Opcodes */ +enum pmic_arb_cmd_op_code { + PMIC_ARB_OP_EXT_WRITEL = 0, + PMIC_ARB_OP_EXT_READL = 1, + PMIC_ARB_OP_EXT_WRITE = 2, + PMIC_ARB_OP_RESET = 3, + PMIC_ARB_OP_SLEEP = 4, + PMIC_ARB_OP_SHUTDOWN = 5, + PMIC_ARB_OP_WAKEUP = 6, + PMIC_ARB_OP_AUTHENTICATE = 7, + PMIC_ARB_OP_MSTR_READ = 8, + PMIC_ARB_OP_MSTR_WRITE = 9, + PMIC_ARB_OP_EXT_READ = 13, + PMIC_ARB_OP_WRITE = 14, + PMIC_ARB_OP_READ = 15, + PMIC_ARB_OP_ZERO_WRITE = 16, +}; + +/* Maximum number of support PMIC peripherals */ +#define PMIC_ARB_MAX_PERIPHS 256 +#define PMIC_ARB_PERIPH_ID_VALID (1 << 15) +#define PMIC_ARB_TIMEOUT_US 100 +#define PMIC_ARB_MAX_TRANS_BYTES (8) + +#define PMIC_ARB_APID_MASK 0xFF +#define PMIC_ARB_PPID_MASK 0xFFF + +/* interrupt enable bit */ +#define SPMI_PIC_ACC_ENABLE_BIT BIT(0) + +/** + * spmi_pmic_arb_dev - SPMI PMIC Arbiter object + * + * @base: address of the PMIC Arbiter core registers. + * @intr: address of the SPMI interrupt control registers. + * @cnfg: address of the PMIC Arbiter configuration registers. + * @lock: lock to synchronize accesses. + * @channel: which channel to use for accesses. + * @irq: PMIC ARB interrupt. + * @ee: the current Execution Environment + * @min_apid: minimum APID (used for bounding IRQ search) + * @max_apid: maximum APID + * @mapping_table: in-memory copy of PPID -> APID mapping table. + * @domain: irq domain object for PMIC IRQ domain + * @spmic: SPMI controller object + * @apid_to_ppid: cached mapping from APID to PPID + */ +struct spmi_pmic_arb_dev { + void __iomem *base; + void __iomem *intr; + void __iomem *cnfg; + raw_spinlock_t lock; + u8 channel; + int irq; + u8 ee; + u8 min_apid; + u8 max_apid; + u32 mapping_table[SPMI_MAPPING_TABLE_LEN]; + struct irq_domain *domain; + struct spmi_controller *spmic; + u16 apid_to_ppid[256]; +}; + +static inline u32 pmic_arb_base_read(struct spmi_pmic_arb_dev *dev, u32 offset) +{ + return readl_relaxed(dev->base + offset); +} + +static inline void pmic_arb_base_write(struct spmi_pmic_arb_dev *dev, + u32 offset, u32 val) +{ + writel_relaxed(val, dev->base + offset); +} + +/** + * pa_read_data: reads pmic-arb's register and copy 1..4 bytes to buf + * @bc: byte count -1. range: 0..3 + * @reg: register's address + * @buf: output parameter, length must be bc + 1 + */ +static void pa_read_data(struct spmi_pmic_arb_dev *dev, u8 *buf, u32 reg, u8 bc) +{ + u32 data = pmic_arb_base_read(dev, reg); + memcpy(buf, &data, (bc & 3) + 1); +} + +/** + * pa_write_data: write 1..4 bytes from buf to pmic-arb's register + * @bc: byte-count -1. range: 0..3. + * @reg: register's address. + * @buf: buffer to write. length must be bc + 1. + */ +static void +pa_write_data(struct spmi_pmic_arb_dev *dev, const u8 *buf, u32 reg, u8 bc) +{ + u32 data = 0; + memcpy(&data, buf, (bc & 3) + 1); + pmic_arb_base_write(dev, reg, data); +} + +static int pmic_arb_wait_for_done(struct spmi_controller *ctrl) +{ + struct spmi_pmic_arb_dev *dev = spmi_controller_get_drvdata(ctrl); + u32 status = 0; + u32 timeout = PMIC_ARB_TIMEOUT_US; + u32 offset = PMIC_ARB_STATUS(dev->channel); + + while (timeout--) { + status = pmic_arb_base_read(dev, offset); + + if (status & PMIC_ARB_STATUS_DONE) { + if (status & PMIC_ARB_STATUS_DENIED) { + dev_err(&ctrl->dev, + "%s: transaction denied (0x%x)\n", + __func__, status); + return -EPERM; + } + + if (status & PMIC_ARB_STATUS_FAILURE) { + dev_err(&ctrl->dev, + "%s: transaction failed (0x%x)\n", + __func__, status); + return -EIO; + } + + if (status & PMIC_ARB_STATUS_DROPPED) { + dev_err(&ctrl->dev, + "%s: transaction dropped (0x%x)\n", + __func__, status); + return -EIO; + } + + return 0; + } + udelay(1); + } + + dev_err(&ctrl->dev, + "%s: timeout, status 0x%x\n", + __func__, status); + return -ETIMEDOUT; +} + +/* Non-data command */ +static int pmic_arb_cmd(struct spmi_controller *ctrl, u8 opc, u8 sid) +{ + struct spmi_pmic_arb_dev *pmic_arb = spmi_controller_get_drvdata(ctrl); + unsigned long flags; + u32 cmd; + int rc; + + /* Check for valid non-data command */ + if (opc < SPMI_CMD_RESET || opc > SPMI_CMD_WAKEUP) + return -EINVAL; + + cmd = ((opc | 0x40) << 27) | ((sid & 0xf) << 20); + + raw_spin_lock_irqsave(&pmic_arb->lock, flags); + pmic_arb_base_write(pmic_arb, PMIC_ARB_CMD(pmic_arb->channel), cmd); + rc = pmic_arb_wait_for_done(ctrl); + raw_spin_unlock_irqrestore(&pmic_arb->lock, flags); + + return rc; +} + +static int pmic_arb_read_cmd(struct spmi_controller *ctrl, u8 opc, u8 sid, + u16 addr, u8 *buf, size_t len) +{ + struct spmi_pmic_arb_dev *pmic_arb = spmi_controller_get_drvdata(ctrl); + unsigned long flags; + u8 bc = len - 1; + u32 cmd; + int rc; + + if (bc >= PMIC_ARB_MAX_TRANS_BYTES) { + dev_err(&ctrl->dev, + "pmic-arb supports 1..%d bytes per trans, but %d requested", + PMIC_ARB_MAX_TRANS_BYTES, len); + return -EINVAL; + } + + /* Check the opcode */ + if (opc >= 0x60 && opc <= 0x7F) + opc = PMIC_ARB_OP_READ; + else if (opc >= 0x20 && opc <= 0x2F) + opc = PMIC_ARB_OP_EXT_READ; + else if (opc >= 0x38 && opc <= 0x3F) + opc = PMIC_ARB_OP_EXT_READL; + else + return -EINVAL; + + cmd = (opc << 27) | ((sid & 0xf) << 20) | (addr << 4) | (bc & 0x7); + + raw_spin_lock_irqsave(&pmic_arb->lock, flags); + pmic_arb_base_write(pmic_arb, PMIC_ARB_CMD(pmic_arb->channel), cmd); + rc = pmic_arb_wait_for_done(ctrl); + if (rc) + goto done; + + pa_read_data(pmic_arb, buf, PMIC_ARB_RDATA0(pmic_arb->channel), + min_t(u8, bc, 3)); + + if (bc > 3) + pa_read_data(pmic_arb, buf + 4, + PMIC_ARB_RDATA1(pmic_arb->channel), bc - 4); + +done: + raw_spin_unlock_irqrestore(&pmic_arb->lock, flags); + return rc; +} + +static int pmic_arb_write_cmd(struct spmi_controller *ctrl, u8 opc, u8 sid, + u16 addr, const u8 *buf, size_t len) +{ + struct spmi_pmic_arb_dev *pmic_arb = spmi_controller_get_drvdata(ctrl); + unsigned long flags; + u8 bc = len - 1; + u32 cmd; + int rc; + + if (bc >= PMIC_ARB_MAX_TRANS_BYTES) { + dev_err(&ctrl->dev, + "pmic-arb supports 1..%d bytes per trans, but:%d requested", + PMIC_ARB_MAX_TRANS_BYTES, len); + return -EINVAL; + } + + /* Check the opcode */ + if (opc >= 0x40 && opc <= 0x5F) + opc = PMIC_ARB_OP_WRITE; + else if (opc >= 0x00 && opc <= 0x0F) + opc = PMIC_ARB_OP_EXT_WRITE; + else if (opc >= 0x30 && opc <= 0x37) + opc = PMIC_ARB_OP_EXT_WRITEL; + else if (opc >= 0x80 && opc <= 0xFF) + opc = PMIC_ARB_OP_ZERO_WRITE; + else + return -EINVAL; + + cmd = (opc << 27) | ((sid & 0xf) << 20) | (addr << 4) | (bc & 0x7); + + /* Write data to FIFOs */ + raw_spin_lock_irqsave(&pmic_arb->lock, flags); + pa_write_data(pmic_arb, buf, PMIC_ARB_WDATA0(pmic_arb->channel) + , min_t(u8, bc, 3)); + if (bc > 3) + pa_write_data(pmic_arb, buf + 4, + PMIC_ARB_WDATA1(pmic_arb->channel), bc - 4); + + /* Start the transaction */ + pmic_arb_base_write(pmic_arb, PMIC_ARB_CMD(pmic_arb->channel), cmd); + rc = pmic_arb_wait_for_done(ctrl); + raw_spin_unlock_irqrestore(&pmic_arb->lock, flags); + + return rc; +} + +enum qpnpint_regs { + QPNPINT_REG_RT_STS = 0x10, + QPNPINT_REG_SET_TYPE = 0x11, + QPNPINT_REG_POLARITY_HIGH = 0x12, + QPNPINT_REG_POLARITY_LOW = 0x13, + QPNPINT_REG_LATCHED_CLR = 0x14, + QPNPINT_REG_EN_SET = 0x15, + QPNPINT_REG_EN_CLR = 0x16, + QPNPINT_REG_LATCHED_STS = 0x18, +}; + +struct spmi_pmic_arb_qpnpint_type { + u8 type; /* 1 -> edge */ + u8 polarity_high; + u8 polarity_low; +} __packed; + +/* Simplified accessor functions for irqchip callbacks */ +static void qpnpint_spmi_write(struct irq_data *d, u8 reg, void *buf, + size_t len) +{ + struct spmi_pmic_arb_dev *pa = irq_data_get_irq_chip_data(d); + u8 sid = d->hwirq >> 24; + u8 per = d->hwirq >> 16; + + if (pmic_arb_write_cmd(pa->spmic, SPMI_CMD_EXT_WRITEL, sid, + (per << 8) + reg, buf, len)) + dev_err_ratelimited(&pa->spmic->dev, + "failed irqchip transaction on %x\n", + d->irq); +} + +static void qpnpint_spmi_read(struct irq_data *d, u8 reg, void *buf, size_t len) +{ + struct spmi_pmic_arb_dev *pa = irq_data_get_irq_chip_data(d); + u8 sid = d->hwirq >> 24; + u8 per = d->hwirq >> 16; + + if (pmic_arb_read_cmd(pa->spmic, SPMI_CMD_EXT_READL, sid, + (per << 8) + reg, buf, len)) + dev_err_ratelimited(&pa->spmic->dev, + "failed irqchip transaction on %x\n", + d->irq); +} + +static void periph_interrupt(struct spmi_pmic_arb_dev *pa, u8 apid) +{ + unsigned int irq; + u32 status; + int id; + + status = readl_relaxed(pa->intr + SPMI_PIC_IRQ_STATUS(apid)); + while (status) { + id = ffs(status) - 1; + status &= ~(1 << id); + irq = irq_find_mapping(pa->domain, + pa->apid_to_ppid[apid] << 16 + | id << 8 + | apid); + generic_handle_irq(irq); + } +} + +static void pmic_arb_chained_irq(unsigned int irq, struct irq_desc *desc) +{ + struct spmi_pmic_arb_dev *pa = irq_get_handler_data(irq); + struct irq_chip *chip = irq_get_chip(irq); + void __iomem *intr = pa->intr; + int first = pa->min_apid >> 5; + int last = pa->max_apid >> 5; + u32 status; + int i, id; + + chained_irq_enter(chip, desc); + + for (i = first; i <= last; ++i) { + status = readl_relaxed(intr + + SPMI_PIC_OWNER_ACC_STATUS(pa->ee, i)); + while (status) { + id = ffs(status) - 1; + status &= ~(1 << id); + periph_interrupt(pa, id + i * 32); + } + } + + chained_irq_exit(chip, desc); +} + +static void qpnpint_irq_ack(struct irq_data *d) +{ + struct spmi_pmic_arb_dev *pa = irq_data_get_irq_chip_data(d); + u8 irq = d->hwirq >> 8; + u8 apid = d->hwirq; + unsigned long flags; + u8 data; + + raw_spin_lock_irqsave(&pa->lock, flags); + writel_relaxed(1 << irq, pa->intr + SPMI_PIC_IRQ_CLEAR(apid)); + raw_spin_unlock_irqrestore(&pa->lock, flags); + + data = 1 << irq; + qpnpint_spmi_write(d, QPNPINT_REG_LATCHED_CLR, &data, 1); +} + +static void qpnpint_irq_mask(struct irq_data *d) +{ + struct spmi_pmic_arb_dev *pa = irq_data_get_irq_chip_data(d); + u8 irq = d->hwirq >> 8; + u8 apid = d->hwirq; + unsigned long flags; + u32 status; + u8 data; + + raw_spin_lock_irqsave(&pa->lock, flags); + status = readl_relaxed(pa->intr + SPMI_PIC_ACC_ENABLE(apid)); + if (status & SPMI_PIC_ACC_ENABLE_BIT) { + status = status & ~SPMI_PIC_ACC_ENABLE_BIT; + writel_relaxed(status, pa->intr + SPMI_PIC_ACC_ENABLE(apid)); + } + raw_spin_unlock_irqrestore(&pa->lock, flags); + + data = 1 << irq; + qpnpint_spmi_write(d, QPNPINT_REG_EN_CLR, &data, 1); +} + +static void qpnpint_irq_unmask(struct irq_data *d) +{ + struct spmi_pmic_arb_dev *pa = irq_data_get_irq_chip_data(d); + u8 irq = d->hwirq >> 8; + u8 apid = d->hwirq; + unsigned long flags; + u32 status; + u8 data; + + raw_spin_lock_irqsave(&pa->lock, flags); + status = readl_relaxed(pa->intr + SPMI_PIC_ACC_ENABLE(apid)); + if (!(status & SPMI_PIC_ACC_ENABLE_BIT)) { + writel_relaxed(status | SPMI_PIC_ACC_ENABLE_BIT, + pa->intr + SPMI_PIC_ACC_ENABLE(apid)); + } + raw_spin_unlock_irqrestore(&pa->lock, flags); + + data = 1 << irq; + qpnpint_spmi_write(d, QPNPINT_REG_EN_SET, &data, 1); +} + +static void qpnpint_irq_enable(struct irq_data *d) +{ + u8 irq = d->hwirq >> 8; + u8 data; + + qpnpint_irq_unmask(d); + + data = 1 << irq; + qpnpint_spmi_write(d, QPNPINT_REG_LATCHED_CLR, &data, 1); +} + +static int qpnpint_irq_set_type(struct irq_data *d, unsigned int flow_type) +{ + struct spmi_pmic_arb_qpnpint_type type; + u8 irq = d->hwirq >> 8; + + qpnpint_spmi_read(d, QPNPINT_REG_SET_TYPE, &type, sizeof(type)); + + if (flow_type & (IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING)) { + type.type |= 1 << irq; + if (flow_type & IRQF_TRIGGER_RISING) + type.polarity_high |= 1 << irq; + if (flow_type & IRQF_TRIGGER_FALLING) + type.polarity_low |= 1 << irq; + } else { + if ((flow_type & (IRQF_TRIGGER_HIGH)) && + (flow_type & (IRQF_TRIGGER_LOW))) + return -EINVAL; + + type.type &= ~(1 << irq); /* level trig */ + if (flow_type & IRQF_TRIGGER_HIGH) + type.polarity_high |= 1 << irq; + else + type.polarity_low |= 1 << irq; + } + + qpnpint_spmi_write(d, QPNPINT_REG_SET_TYPE, &type, sizeof(type)); + return 0; +} + +static struct irq_chip pmic_arb_irqchip = { + .name = "pmic_arb", + .irq_enable = qpnpint_irq_enable, + .irq_ack = qpnpint_irq_ack, + .irq_mask = qpnpint_irq_mask, + .irq_unmask = qpnpint_irq_unmask, + .irq_set_type = qpnpint_irq_set_type, + .flags = IRQCHIP_MASK_ON_SUSPEND + | IRQCHIP_SKIP_SET_WAKE, +}; + +struct spmi_pmic_arb_irq_spec { + unsigned slave:4; + unsigned per:8; + unsigned irq:3; +}; + +static int search_mapping_table(struct spmi_pmic_arb_dev *pa, + struct spmi_pmic_arb_irq_spec *spec, + u8 *apid) +{ + u16 ppid = spec->slave << 8 | spec->per; + u32 *mapping_table = pa->mapping_table; + int index = 0, i; + u32 data; + + for (i = 0; i < SPMI_MAPPING_TABLE_TREE_DEPTH; ++i) { + data = mapping_table[index]; + + if (ppid & (1 << SPMI_MAPPING_BIT_INDEX(data))) { + if (SPMI_MAPPING_BIT_IS_1_FLAG(data)) { + index = SPMI_MAPPING_BIT_IS_1_RESULT(data); + } else { + *apid = SPMI_MAPPING_BIT_IS_1_RESULT(data); + return 0; + } + } else { + if (SPMI_MAPPING_BIT_IS_0_FLAG(data)) { + index = SPMI_MAPPING_BIT_IS_0_RESULT(data); + } else { + *apid = SPMI_MAPPING_BIT_IS_0_RESULT(data); + return 0; + } + } + } + + return -ENODEV; +} + +static int qpnpint_irq_domain_dt_translate(struct irq_domain *d, + struct device_node *controller, + const u32 *intspec, + unsigned int intsize, + unsigned long *out_hwirq, + unsigned int *out_type) +{ + struct spmi_pmic_arb_dev *pa = d->host_data; + struct spmi_pmic_arb_irq_spec spec; + int err; + u8 apid; + + dev_dbg(&pa->spmic->dev, + "intspec[0] 0x%1x intspec[1] 0x%02x intspec[2] 0x%02x\n", + intspec[0], intspec[1], intspec[2]); + + if (d->of_node != controller) + return -EINVAL; + if (intsize != 4) + return -EINVAL; + if (intspec[0] > 0xF || intspec[1] > 0xFF || intspec[2] > 0x7) + return -EINVAL; + + spec.slave = intspec[0]; + spec.per = intspec[1]; + spec.irq = intspec[2]; + + err = search_mapping_table(pa, &spec, &apid); + if (err) + return err; + + pa->apid_to_ppid[apid] = spec.slave << 8 | spec.per; + + /* Keep track of {max,min}_apid for bounding search during interrupt */ + if (apid > pa->max_apid) + pa->max_apid = apid; + if (apid < pa->min_apid) + pa->min_apid = apid; + + *out_hwirq = spec.slave << 24 + | spec.per << 16 + | spec.irq << 8 + | apid; + *out_type = intspec[3] & IRQ_TYPE_SENSE_MASK; + + dev_dbg(&pa->spmic->dev, "out_hwirq = %lu\n", *out_hwirq); + + return 0; +} + +static int qpnpint_irq_domain_map(struct irq_domain *d, + unsigned int virq, + irq_hw_number_t hwirq) +{ + struct spmi_pmic_arb_dev *pa = d->host_data; + + dev_dbg(&pa->spmic->dev, "virq = %u, hwirq = %lu\n", virq, hwirq); + + irq_set_chip_and_handler(virq, &pmic_arb_irqchip, handle_level_irq); + irq_set_chip_data(virq, d->host_data); + irq_set_noprobe(virq); + return 0; +} + +static const struct irq_domain_ops pmic_arb_irq_domain_ops = { + .map = qpnpint_irq_domain_map, + .xlate = qpnpint_irq_domain_dt_translate, +}; + +static int spmi_pmic_arb_probe(struct platform_device *pdev) +{ + struct spmi_pmic_arb_dev *pa; + struct spmi_controller *ctrl; + struct resource *res; + u32 channel, ee; + int err, i; + + ctrl = spmi_controller_alloc(&pdev->dev, sizeof(*pa)); + if (!ctrl) + return -ENOMEM; + + pa = spmi_controller_get_drvdata(ctrl); + pa->spmic = ctrl; + + res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "core"); + pa->base = devm_ioremap_resource(&ctrl->dev, res); + if (IS_ERR(pa->base)) { + err = PTR_ERR(pa->base); + goto err_put_ctrl; + } + + res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "intr"); + pa->intr = devm_ioremap_resource(&ctrl->dev, res); + if (IS_ERR(pa->intr)) { + err = PTR_ERR(pa->intr); + goto err_put_ctrl; + } + + res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "cnfg"); + pa->cnfg = devm_ioremap_resource(&ctrl->dev, res); + if (IS_ERR(pa->cnfg)) { + err = PTR_ERR(pa->cnfg); + goto err_put_ctrl; + } + + pa->irq = platform_get_irq_byname(pdev, "periph_irq"); + if (pa->irq < 0) { + err = pa->irq; + goto err_put_ctrl; + } + + err = of_property_read_u32(pdev->dev.of_node, "qcom,channel", &channel); + if (err) { + dev_err(&pdev->dev, "channel unspecified.\n"); + goto err_put_ctrl; + } + + if (channel > 5) { + dev_err(&pdev->dev, "invalid channel (%u) specified.\n", + channel); + goto err_put_ctrl; + } + + pa->channel = channel; + + err = of_property_read_u32(pdev->dev.of_node, "qcom,ee", &ee); + if (err) { + dev_err(&pdev->dev, "EE unspecified.\n"); + goto err_put_ctrl; + } + + if (ee > 5) { + dev_err(&pdev->dev, "invalid EE (%u) specified\n", ee); + err = -EINVAL; + goto err_put_ctrl; + } + + pa->ee = ee; + + for (i = 0; i < ARRAY_SIZE(pa->mapping_table); ++i) + pa->mapping_table[i] = readl_relaxed( + pa->cnfg + SPMI_MAPPING_TABLE_REG(i)); + + /* Initialize max_apid/min_apid to the opposite bounds, during + * the irq domain translation, we are sure to update these */ + pa->max_apid = 0; + pa->min_apid = PMIC_ARB_MAX_PERIPHS - 1; + + platform_set_drvdata(pdev, ctrl); + raw_spin_lock_init(&pa->lock); + + ctrl->cmd = pmic_arb_cmd; + ctrl->read_cmd = pmic_arb_read_cmd; + ctrl->write_cmd = pmic_arb_write_cmd; + + dev_dbg(&pdev->dev, "adding irq domain\n"); + pa->domain = irq_domain_add_tree(pdev->dev.of_node, + &pmic_arb_irq_domain_ops, pa); + if (!pa->domain) { + dev_err(&pdev->dev, "unable to create irq_domain\n"); + err = -ENOMEM; + goto err_put_ctrl; + } + + irq_set_handler_data(pa->irq, pa); + irq_set_chained_handler(pa->irq, pmic_arb_chained_irq); + + err = spmi_controller_add(ctrl); + if (err) + goto err_domain_remove; + + dev_dbg(&ctrl->dev, "PMIC Arb Version 0x%x\n", + pmic_arb_base_read(pa, PMIC_ARB_VERSION)); + + return 0; + +err_domain_remove: + irq_set_chained_handler(pa->irq, NULL); + irq_set_handler_data(pa->irq, NULL); + irq_domain_remove(pa->domain); +err_put_ctrl: + spmi_controller_put(ctrl); + return err; +} + +static int spmi_pmic_arb_remove(struct platform_device *pdev) +{ + struct spmi_controller *ctrl = platform_get_drvdata(pdev); + struct spmi_pmic_arb_dev *pa = spmi_controller_get_drvdata(ctrl); + spmi_controller_remove(ctrl); + irq_set_chained_handler(pa->irq, NULL); + irq_set_handler_data(pa->irq, NULL); + irq_domain_remove(pa->domain); + spmi_controller_put(ctrl); + return 0; +} + +static const struct of_device_id spmi_pmic_arb_match_table[] = { + { .compatible = "qcom,spmi-pmic-arb", }, + {}, +}; +MODULE_DEVICE_TABLE(of, spmi_pmic_arb_match_table); + +static struct platform_driver spmi_pmic_arb_driver = { + .probe = spmi_pmic_arb_probe, + .remove = spmi_pmic_arb_remove, + .driver = { + .name = "spmi_pmic_arb", + .owner = THIS_MODULE, + .of_match_table = spmi_pmic_arb_match_table, + }, +}; +module_platform_driver(spmi_pmic_arb_driver); + +MODULE_LICENSE("GPL v2"); +MODULE_ALIAS("platform:spmi_pmic_arb"); diff --git a/drivers/spmi/spmi.c b/drivers/spmi/spmi.c new file mode 100644 index 000000000000..3b5780710d50 --- /dev/null +++ b/drivers/spmi/spmi.c @@ -0,0 +1,574 @@ +/* Copyright (c) 2012-2013, The Linux Foundation. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 and + * only version 2 as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ +#include <linux/kernel.h> +#include <linux/errno.h> +#include <linux/idr.h> +#include <linux/slab.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/of_device.h> +#include <linux/platform_device.h> +#include <linux/spmi.h> +#include <linux/module.h> +#include <linux/pm_runtime.h> + +#include <dt-bindings/spmi/spmi.h> + +static DEFINE_IDA(ctrl_ida); + +static void spmi_dev_release(struct device *dev) +{ + struct spmi_device *sdev = to_spmi_device(dev); + kfree(sdev); +} + +static const struct device_type spmi_dev_type = { + .release = spmi_dev_release, +}; + +static void spmi_ctrl_release(struct device *dev) +{ + struct spmi_controller *ctrl = to_spmi_controller(dev); + ida_simple_remove(&ctrl_ida, ctrl->nr); + kfree(ctrl); +} + +static const struct device_type spmi_ctrl_type = { + .release = spmi_ctrl_release, +}; + +static int spmi_device_match(struct device *dev, struct device_driver *drv) +{ + if (of_driver_match_device(dev, drv)) + return 1; + + if (drv->name) + return strncmp(dev_name(dev), drv->name, + SPMI_NAME_SIZE) == 0; + + return 0; +} + +/** + * spmi_device_add() - add a device previously constructed via spmi_device_alloc() + * @sdev: spmi_device to be added + */ +int spmi_device_add(struct spmi_device *sdev) +{ + struct spmi_controller *ctrl = sdev->ctrl; + int err; + + dev_set_name(&sdev->dev, "%d-%02x", ctrl->nr, sdev->usid); + + err = device_add(&sdev->dev); + if (err < 0) { + dev_err(&sdev->dev, "Can't add %s, status %d\n", + dev_name(&sdev->dev), err); + goto err_device_add; + } + + dev_dbg(&sdev->dev, "device %s registered\n", dev_name(&sdev->dev)); + +err_device_add: + return err; +} +EXPORT_SYMBOL_GPL(spmi_device_add); + +/** + * spmi_device_remove(): remove an SPMI device + * @sdev: spmi_device to be removed + */ +void spmi_device_remove(struct spmi_device *sdev) +{ + device_unregister(&sdev->dev); +} +EXPORT_SYMBOL_GPL(spmi_device_remove); + +static inline int +spmi_cmd(struct spmi_controller *ctrl, u8 opcode, u8 sid) +{ + if (!ctrl || !ctrl->cmd || ctrl->dev.type != &spmi_ctrl_type) + return -EINVAL; + + return ctrl->cmd(ctrl, opcode, sid); +} + +static inline int spmi_read_cmd(struct spmi_controller *ctrl, u8 opcode, + u8 sid, u16 addr, u8 *buf, size_t len) +{ + if (!ctrl || !ctrl->read_cmd || ctrl->dev.type != &spmi_ctrl_type) + return -EINVAL; + + return ctrl->read_cmd(ctrl, opcode, sid, addr, buf, len); +} + +static inline int spmi_write_cmd(struct spmi_controller *ctrl, u8 opcode, + u8 sid, u16 addr, const u8 *buf, size_t len) +{ + if (!ctrl || !ctrl->write_cmd || ctrl->dev.type != &spmi_ctrl_type) + return -EINVAL; + + return ctrl->write_cmd(ctrl, opcode, sid, addr, buf, len); +} + +/** + * spmi_register_read() - register read + * @sdev: SPMI device. + * @addr: slave register address (5-bit address). + * @buf: buffer to be populated with data from the Slave. + * + * Reads 1 byte of data from a Slave device register. + */ +int spmi_register_read(struct spmi_device *sdev, u8 addr, u8 *buf) +{ + /* 5-bit register address */ + if (addr > 0x1F) + return -EINVAL; + + return spmi_read_cmd(sdev->ctrl, SPMI_CMD_READ, sdev->usid, addr, + buf, 1); +} +EXPORT_SYMBOL_GPL(spmi_register_read); + +/** + * spmi_ext_register_read() - extended register read + * @sdev: SPMI device. + * @addr: slave register address (8-bit address). + * @buf: buffer to be populated with data from the Slave. + * @len: the request number of bytes to read (up to 16 bytes). + * + * Reads up to 16 bytes of data from the extended register space on a + * Slave device. + */ +int spmi_ext_register_read(struct spmi_device *sdev, u8 addr, u8 *buf, + size_t len) +{ + /* 8-bit register address, up to 16 bytes */ + if (len == 0 || len > 16) + return -EINVAL; + + return spmi_read_cmd(sdev->ctrl, SPMI_CMD_EXT_READ, sdev->usid, addr, + buf, len); +} +EXPORT_SYMBOL_GPL(spmi_ext_register_read); + +/** + * spmi_ext_register_readl() - extended register read long + * @sdev: SPMI device. + * @addr: slave register address (16-bit address). + * @buf: buffer to be populated with data from the Slave. + * @len: the request number of bytes to read (up to 8 bytes). + * + * Reads up to 8 bytes of data from the extended register space on a + * Slave device using 16-bit address. + */ +int spmi_ext_register_readl(struct spmi_device *sdev, u16 addr, u8 *buf, + size_t len) +{ + /* 16-bit register address, up to 8 bytes */ + if (len == 0 || len > 8) + return -EINVAL; + + return spmi_read_cmd(sdev->ctrl, SPMI_CMD_EXT_READL, sdev->usid, addr, + buf, len); +} +EXPORT_SYMBOL_GPL(spmi_ext_register_readl); + +/** + * spmi_register_write() - register write + * @sdev: SPMI device + * @addr: slave register address (5-bit address). + * @data: buffer containing the data to be transferred to the Slave. + * + * Writes 1 byte of data to a Slave device register. + */ +int spmi_register_write(struct spmi_device *sdev, u8 addr, u8 data) +{ + /* 5-bit register address */ + if (addr > 0x1F) + return -EINVAL; + + return spmi_write_cmd(sdev->ctrl, SPMI_CMD_WRITE, sdev->usid, addr, + &data, 1); +} +EXPORT_SYMBOL_GPL(spmi_register_write); + +/** + * spmi_register_zero_write() - register zero write + * @sdev: SPMI device. + * @data: the data to be written to register 0 (7-bits). + * + * Writes data to register 0 of the Slave device. + */ +int spmi_register_zero_write(struct spmi_device *sdev, u8 data) +{ + return spmi_write_cmd(sdev->ctrl, SPMI_CMD_ZERO_WRITE, sdev->usid, 0, + &data, 1); +} +EXPORT_SYMBOL_GPL(spmi_register_zero_write); + +/** + * spmi_ext_register_write() - extended register write + * @sdev: SPMI device. + * @addr: slave register address (8-bit address). + * @buf: buffer containing the data to be transferred to the Slave. + * @len: the request number of bytes to read (up to 16 bytes). + * + * Writes up to 16 bytes of data to the extended register space of a + * Slave device. + */ +int spmi_ext_register_write(struct spmi_device *sdev, u8 addr, const u8 *buf, + size_t len) +{ + /* 8-bit register address, up to 16 bytes */ + if (len == 0 || len > 16) + return -EINVAL; + + return spmi_write_cmd(sdev->ctrl, SPMI_CMD_EXT_WRITE, sdev->usid, addr, + buf, len); +} +EXPORT_SYMBOL_GPL(spmi_ext_register_write); + +/** + * spmi_ext_register_writel() - extended register write long + * @sdev: SPMI device. + * @addr: slave register address (16-bit address). + * @buf: buffer containing the data to be transferred to the Slave. + * @len: the request number of bytes to read (up to 8 bytes). + * + * Writes up to 8 bytes of data to the extended register space of a + * Slave device using 16-bit address. + */ +int spmi_ext_register_writel(struct spmi_device *sdev, u16 addr, const u8 *buf, + size_t len) +{ + /* 4-bit Slave Identifier, 16-bit register address, up to 8 bytes */ + if (len == 0 || len > 8) + return -EINVAL; + + return spmi_write_cmd(sdev->ctrl, SPMI_CMD_EXT_WRITEL, sdev->usid, + addr, buf, len); +} +EXPORT_SYMBOL_GPL(spmi_ext_register_writel); + +/** + * spmi_command_reset() - sends RESET command to the specified slave + * @sdev: SPMI device. + * + * The Reset command initializes the Slave and forces all registers to + * their reset values. The Slave shall enter the STARTUP state after + * receiving a Reset command. + */ +int spmi_command_reset(struct spmi_device *sdev) +{ + return spmi_cmd(sdev->ctrl, SPMI_CMD_RESET, sdev->usid); +} +EXPORT_SYMBOL_GPL(spmi_command_reset); + +/** + * spmi_command_sleep() - sends SLEEP command to the specified SPMI device + * @sdev: SPMI device. + * + * The Sleep command causes the Slave to enter the user defined SLEEP state. + */ +int spmi_command_sleep(struct spmi_device *sdev) +{ + return spmi_cmd(sdev->ctrl, SPMI_CMD_SLEEP, sdev->usid); +} +EXPORT_SYMBOL_GPL(spmi_command_sleep); + +/** + * spmi_command_wakeup() - sends WAKEUP command to the specified SPMI device + * @sdev: SPMI device. + * + * The Wakeup command causes the Slave to move from the SLEEP state to + * the ACTIVE state. + */ +int spmi_command_wakeup(struct spmi_device *sdev) +{ + return spmi_cmd(sdev->ctrl, SPMI_CMD_WAKEUP, sdev->usid); +} +EXPORT_SYMBOL_GPL(spmi_command_wakeup); + +/** + * spmi_command_shutdown() - sends SHUTDOWN command to the specified SPMI device + * @sdev: SPMI device. + * + * The Shutdown command causes the Slave to enter the SHUTDOWN state. + */ +int spmi_command_shutdown(struct spmi_device *sdev) +{ + return spmi_cmd(sdev->ctrl, SPMI_CMD_SHUTDOWN, sdev->usid); +} +EXPORT_SYMBOL_GPL(spmi_command_shutdown); + +static int spmi_drv_probe(struct device *dev) +{ + const struct spmi_driver *sdrv = to_spmi_driver(dev->driver); + struct spmi_device *sdev = to_spmi_device(dev); + int err; + + /* Ensure the slave is in ACTIVE state */ + err = spmi_command_wakeup(sdev); + if (err) + goto fail_wakeup; + + pm_runtime_get_noresume(dev); + pm_runtime_set_active(dev); + pm_runtime_enable(dev); + + err = sdrv->probe(sdev); + if (err) + goto fail_probe; + + return 0; + +fail_probe: + pm_runtime_disable(dev); + pm_runtime_set_suspended(dev); + pm_runtime_put_noidle(dev); +fail_wakeup: + return err; +} + +static int spmi_drv_remove(struct device *dev) +{ + const struct spmi_driver *sdrv = to_spmi_driver(dev->driver); + + pm_runtime_get_sync(dev); + sdrv->remove(to_spmi_device(dev)); + pm_runtime_put_noidle(dev); + + pm_runtime_disable(dev); + pm_runtime_set_suspended(dev); + pm_runtime_put_noidle(dev); + return 0; +} + +static struct bus_type spmi_bus_type = { + .name = "spmi", + .match = spmi_device_match, + .probe = spmi_drv_probe, + .remove = spmi_drv_remove, +}; + +/** + * spmi_controller_alloc() - Allocate a new SPMI device + * @ctrl: associated controller + * + * Caller is responsible for either calling spmi_device_add() to add the + * newly allocated controller, or calling spmi_device_put() to discard it. + */ +struct spmi_device *spmi_device_alloc(struct spmi_controller *ctrl) +{ + struct spmi_device *sdev; + + sdev = kzalloc(sizeof(*sdev), GFP_KERNEL); + if (!sdev) + return NULL; + + sdev->ctrl = ctrl; + device_initialize(&sdev->dev); + sdev->dev.parent = &ctrl->dev; + sdev->dev.bus = &spmi_bus_type; + sdev->dev.type = &spmi_dev_type; + return sdev; +} +EXPORT_SYMBOL_GPL(spmi_device_alloc); + +/** + * spmi_controller_alloc() - Allocate a new SPMI controller + * @parent: parent device + * @size: size of private data + * + * Caller is responsible for either calling spmi_controller_add() to add the + * newly allocated controller, or calling spmi_controller_put() to discard it. + * The allocated private data region may be accessed via + * spmi_controller_get_drvdata() + */ +struct spmi_controller *spmi_controller_alloc(struct device *parent, + size_t size) +{ + struct spmi_controller *ctrl; + int id; + + if (WARN_ON(!parent)) + return NULL; + + ctrl = kzalloc(sizeof(*ctrl) + size, GFP_KERNEL); + if (!ctrl) + return NULL; + + device_initialize(&ctrl->dev); + ctrl->dev.type = &spmi_ctrl_type; + ctrl->dev.bus = &spmi_bus_type; + ctrl->dev.parent = parent; + ctrl->dev.of_node = parent->of_node; + spmi_controller_set_drvdata(ctrl, &ctrl[1]); + + id = ida_simple_get(&ctrl_ida, 0, 0, GFP_KERNEL); + if (id < 0) { + dev_err(parent, + "unable to allocate SPMI controller identifier.\n"); + spmi_controller_put(ctrl); + return NULL; + } + + ctrl->nr = id; + dev_set_name(&ctrl->dev, "spmi-%d", id); + + dev_dbg(&ctrl->dev, "allocated controller 0x%p id %d\n", ctrl, id); + return ctrl; +} +EXPORT_SYMBOL_GPL(spmi_controller_alloc); + +static void of_spmi_register_devices(struct spmi_controller *ctrl) +{ + struct device_node *node; + int err; + + if (!ctrl->dev.of_node) + return; + + for_each_available_child_of_node(ctrl->dev.of_node, node) { + struct spmi_device *sdev; + u32 reg[2]; + + dev_dbg(&ctrl->dev, "adding child %s\n", node->full_name); + + err = of_property_read_u32_array(node, "reg", reg, 2); + if (err) { + dev_err(&ctrl->dev, + "node %s err (%d) does not have 'reg' property\n", + node->full_name, err); + continue; + } + + if (reg[1] != SPMI_USID) { + dev_err(&ctrl->dev, + "node %s contains unsupported 'reg' entry\n", + node->full_name); + continue; + } + + if (reg[0] >= SPMI_MAX_SLAVE_ID) { + dev_err(&ctrl->dev, + "invalid usid on node %s\n", + node->full_name); + continue; + } + + dev_dbg(&ctrl->dev, "read usid %02x\n", reg[0]); + + sdev = spmi_device_alloc(ctrl); + if (!sdev) + continue; + + sdev->dev.of_node = node; + sdev->usid = (u8) reg[0]; + + err = spmi_device_add(sdev); + if (err) { + dev_err(&sdev->dev, + "failure adding device. status %d\n", err); + spmi_device_put(sdev); + } + } +} + +/** + * spmi_controller_add() - Add an SPMI controller + * @ctrl: controller to be registered. + * + * Register a controller previously allocated via spmi_controller_alloc() with + * the SPMI core. + */ +int spmi_controller_add(struct spmi_controller *ctrl) +{ + int ret; + + /* Can't register until after driver model init */ + if (WARN_ON(!spmi_bus_type.p)) + return -EAGAIN; + + ret = device_add(&ctrl->dev); + if (ret) + return ret; + + if (IS_ENABLED(CONFIG_OF)) + of_spmi_register_devices(ctrl); + + dev_dbg(&ctrl->dev, "spmi-%d registered: dev:%p\n", + ctrl->nr, &ctrl->dev); + + return 0; +}; +EXPORT_SYMBOL_GPL(spmi_controller_add); + +/* Remove a device associated with a controller */ +static int spmi_ctrl_remove_device(struct device *dev, void *data) +{ + struct spmi_device *spmidev = to_spmi_device(dev); + if (dev->type == &spmi_dev_type) + spmi_device_remove(spmidev); + return 0; +} + +/** + * spmi_controller_remove(): remove an SPMI controller + * @ctrl: controller to remove + * + * Remove a SPMI controller. Caller is responsible for calling + * spmi_controller_put() to discard the allocated controller. + */ +void spmi_controller_remove(struct spmi_controller *ctrl) +{ + int dummy; + + if (!ctrl) + return; + + dummy = device_for_each_child(&ctrl->dev, NULL, + spmi_ctrl_remove_device); + device_del(&ctrl->dev); +} +EXPORT_SYMBOL_GPL(spmi_controller_remove); + +/** + * spmi_driver_register() - Register client driver with SPMI core + * @sdrv: client driver to be associated with client-device. + * + * This API will register the client driver with the SPMI framework. + * It is typically called from the driver's module-init function. + */ +int spmi_driver_register(struct spmi_driver *sdrv) +{ + sdrv->driver.bus = &spmi_bus_type; + return driver_register(&sdrv->driver); +} +EXPORT_SYMBOL_GPL(spmi_driver_register); + +static void __exit spmi_exit(void) +{ + bus_unregister(&spmi_bus_type); +} +module_exit(spmi_exit); + +static int __init spmi_init(void) +{ + return bus_register(&spmi_bus_type); +} +postcore_initcall(spmi_init); + +MODULE_LICENSE("GPL v2"); +MODULE_DESCRIPTION("SPMI module"); +MODULE_ALIAS("platform:spmi"); diff --git a/drivers/usb/dwc3/dwc3-omap.c b/drivers/usb/dwc3/dwc3-omap.c index b269dbd47fc4..b1d7ee6e40b7 100644 --- a/drivers/usb/dwc3/dwc3-omap.c +++ b/drivers/usb/dwc3/dwc3-omap.c @@ -29,7 +29,6 @@ #include <linux/of.h> #include <linux/of_platform.h> #include <linux/extcon.h> -#include <linux/extcon/of_extcon.h> #include <linux/regulator/consumer.h> #include <linux/usb/otg.h> @@ -522,7 +521,7 @@ static int dwc3_omap_probe(struct platform_device *pdev) dwc3_omap_enable_irqs(omap); if (of_property_read_bool(node, "extcon")) { - edev = of_extcon_get_extcon_dev(dev, 0); + edev = extcon_get_edev_by_phandle(dev, 0); if (IS_ERR(edev)) { dev_vdbg(dev, "couldn't get extcon device\n"); ret = -EPROBE_DEFER; diff --git a/drivers/video/hyperv_fb.c b/drivers/video/hyperv_fb.c index 130708f96430..e23392ec5af3 100644 --- a/drivers/video/hyperv_fb.c +++ b/drivers/video/hyperv_fb.c @@ -42,6 +42,7 @@ #include <linux/completion.h> #include <linux/fb.h> #include <linux/pci.h> +#include <linux/efi.h> #include <linux/hyperv.h> @@ -212,6 +213,7 @@ struct synthvid_msg { struct hvfb_par { struct fb_info *info; + struct resource mem; bool fb_ready; /* fb device is ready */ struct completion wait; u32 synthvid_version; @@ -460,13 +462,13 @@ static int synthvid_connect_vsp(struct hv_device *hdev) goto error; } - if (par->synthvid_version == SYNTHVID_VERSION_WIN7) { + if (par->synthvid_version == SYNTHVID_VERSION_WIN7) screen_depth = SYNTHVID_DEPTH_WIN7; - screen_fb_size = SYNTHVID_FB_SIZE_WIN7; - } else { + else screen_depth = SYNTHVID_DEPTH_WIN8; - screen_fb_size = SYNTHVID_FB_SIZE_WIN8; - } + + screen_fb_size = hdev->channel->offermsg.offer. + mmio_megabytes * 1024 * 1024; return 0; @@ -627,26 +629,46 @@ static void hvfb_get_option(struct fb_info *info) /* Get framebuffer memory from Hyper-V video pci space */ static int hvfb_getmem(struct fb_info *info) { - struct pci_dev *pdev; - ulong fb_phys; + struct hvfb_par *par = info->par; + struct pci_dev *pdev = NULL; void __iomem *fb_virt; + int gen2vm = efi_enabled(EFI_BOOT); + int ret; - pdev = pci_get_device(PCI_VENDOR_ID_MICROSOFT, + par->mem.name = KBUILD_MODNAME; + par->mem.flags = IORESOURCE_MEM | IORESOURCE_BUSY; + if (gen2vm) { + ret = allocate_resource(&hyperv_mmio, &par->mem, + screen_fb_size, + 0, -1, + screen_fb_size, + NULL, NULL); + if (ret != 0) { + pr_err("Unable to allocate framebuffer memory\n"); + return -ENODEV; + } + } else { + pdev = pci_get_device(PCI_VENDOR_ID_MICROSOFT, PCI_DEVICE_ID_HYPERV_VIDEO, NULL); - if (!pdev) { - pr_err("Unable to find PCI Hyper-V video\n"); - return -ENODEV; - } + if (!pdev) { + pr_err("Unable to find PCI Hyper-V video\n"); + return -ENODEV; + } - if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM) || - pci_resource_len(pdev, 0) < screen_fb_size) - goto err1; + if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM) || + pci_resource_len(pdev, 0) < screen_fb_size) + goto err1; - fb_phys = pci_resource_end(pdev, 0) - screen_fb_size + 1; - if (!request_mem_region(fb_phys, screen_fb_size, KBUILD_MODNAME)) - goto err1; + par->mem.end = pci_resource_end(pdev, 0); + par->mem.start = par->mem.end - screen_fb_size + 1; + ret = request_resource(&pdev->resource[0], &par->mem); + if (ret != 0) { + pr_err("Unable to request framebuffer memory\n"); + goto err1; + } + } - fb_virt = ioremap(fb_phys, screen_fb_size); + fb_virt = ioremap(par->mem.start, screen_fb_size); if (!fb_virt) goto err2; @@ -654,30 +676,44 @@ static int hvfb_getmem(struct fb_info *info) if (!info->apertures) goto err3; - info->apertures->ranges[0].base = pci_resource_start(pdev, 0); - info->apertures->ranges[0].size = pci_resource_len(pdev, 0); - info->fix.smem_start = fb_phys; + if (gen2vm) { + info->apertures->ranges[0].base = screen_info.lfb_base; + info->apertures->ranges[0].size = screen_info.lfb_size; + remove_conflicting_framebuffers(info->apertures, + KBUILD_MODNAME, false); + } else { + info->apertures->ranges[0].base = pci_resource_start(pdev, 0); + info->apertures->ranges[0].size = pci_resource_len(pdev, 0); + } + + info->fix.smem_start = par->mem.start; info->fix.smem_len = screen_fb_size; info->screen_base = fb_virt; info->screen_size = screen_fb_size; - pci_dev_put(pdev); + if (!gen2vm) + pci_dev_put(pdev); + return 0; err3: iounmap(fb_virt); err2: - release_mem_region(fb_phys, screen_fb_size); + release_resource(&par->mem); err1: - pci_dev_put(pdev); + if (!gen2vm) + pci_dev_put(pdev); + return -ENOMEM; } /* Release the framebuffer */ static void hvfb_putmem(struct fb_info *info) { + struct hvfb_par *par = info->par; + iounmap(info->screen_base); - release_mem_region(info->fix.smem_start, screen_fb_size); + release_resource(&par->mem); } diff --git a/drivers/video/uvesafb.c b/drivers/video/uvesafb.c index 256fba7f4641..1f38445014c1 100644 --- a/drivers/video/uvesafb.c +++ b/drivers/video/uvesafb.c @@ -190,7 +190,7 @@ static int uvesafb_exec(struct uvesafb_ktask *task) uvfb_tasks[seq] = task; mutex_unlock(&uvfb_lock); - err = cn_netlink_send(m, 0, GFP_KERNEL); + err = cn_netlink_send(m, 0, 0, GFP_KERNEL); if (err == -ESRCH) { /* * Try to start the userspace helper if sending @@ -204,7 +204,7 @@ static int uvesafb_exec(struct uvesafb_ktask *task) "helper is installed and executable\n"); } else { v86d_started = 1; - err = cn_netlink_send(m, 0, gfp_any()); + err = cn_netlink_send(m, 0, 0, gfp_any()); if (err == -ENOBUFS) err = 0; } diff --git a/drivers/vme/bridges/vme_ca91cx42.c b/drivers/vme/bridges/vme_ca91cx42.c index 1b5d48c578e1..bfb2d3f06738 100644 --- a/drivers/vme/bridges/vme_ca91cx42.c +++ b/drivers/vme/bridges/vme_ca91cx42.c @@ -869,14 +869,13 @@ static ssize_t ca91cx42_master_read(struct vme_master_resource *image, spin_lock(&image->lock); - /* The following code handles VME address alignment problem - * in order to assure the maximal data width cycle. - * We cannot use memcpy_xxx directly here because it - * may cut data transfer in 8-bits cycles, thus making - * D16 cycle impossible. - * From the other hand, the bridge itself assures that - * maximal configured data cycle is used and splits it - * automatically for non-aligned addresses. + /* The following code handles VME address alignment. We cannot use + * memcpy_xxx here because it may cut data transfers in to 8-bit + * cycles when D16 or D32 cycles are required on the VME bus. + * On the other hand, the bridge itself assures that the maximum data + * cycle configured for the transfer is used and splits it + * automatically for non-aligned addresses, so we don't want the + * overhead of needlessly forcing small transfers for the entire cycle. */ if ((uintptr_t)addr & 0x1) { *(u8 *)buf = ioread8(addr); @@ -896,9 +895,9 @@ static ssize_t ca91cx42_master_read(struct vme_master_resource *image, } count32 = (count - done) & ~0x3; - if (count32 > 0) { - memcpy_fromio(buf + done, addr + done, (unsigned int)count); - done += count32; + while (done < count32) { + *(u32 *)(buf + done) = ioread32(addr + done); + done += 4; } if ((count - done) & 0x2) { @@ -930,7 +929,7 @@ static ssize_t ca91cx42_master_write(struct vme_master_resource *image, spin_lock(&image->lock); /* Here we apply for the same strategy we do in master_read - * function in order to assure D16 cycle when required. + * function in order to assure the correct cycles. */ if ((uintptr_t)addr & 0x1) { iowrite8(*(u8 *)buf, addr); @@ -950,9 +949,9 @@ static ssize_t ca91cx42_master_write(struct vme_master_resource *image, } count32 = (count - done) & ~0x3; - if (count32 > 0) { - memcpy_toio(addr + done, buf + done, count32); - done += count32; + while (done < count32) { + iowrite32(*(u32 *)(buf + done), addr + done); + done += 4; } if ((count - done) & 0x2) { diff --git a/drivers/vme/bridges/vme_tsi148.c b/drivers/vme/bridges/vme_tsi148.c index 9911cd5fddb5..06990c6a1a69 100644 --- a/drivers/vme/bridges/vme_tsi148.c +++ b/drivers/vme/bridges/vme_tsi148.c @@ -1276,8 +1276,8 @@ static ssize_t tsi148_master_read(struct vme_master_resource *image, void *buf, spin_lock(&image->lock); /* The following code handles VME address alignment. We cannot use - * memcpy_xxx directly here because it may cut small data transfers in - * to 8-bit cycles, thus making D16 cycle impossible. + * memcpy_xxx here because it may cut data transfers in to 8-bit + * cycles when D16 or D32 cycles are required on the VME bus. * On the other hand, the bridge itself assures that the maximum data * cycle configured for the transfer is used and splits it * automatically for non-aligned addresses, so we don't want the @@ -1301,9 +1301,9 @@ static ssize_t tsi148_master_read(struct vme_master_resource *image, void *buf, } count32 = (count - done) & ~0x3; - if (count32 > 0) { - memcpy_fromio(buf + done, addr + done, count32); - done += count32; + while (done < count32) { + *(u32 *)(buf + done) = ioread32(addr + done); + done += 4; } if ((count - done) & 0x2) { @@ -1363,7 +1363,7 @@ static ssize_t tsi148_master_write(struct vme_master_resource *image, void *buf, spin_lock(&image->lock); /* Here we apply for the same strategy we do in master_read - * function in order to assure D16 cycle when required. + * function in order to assure the correct cycles. */ if ((uintptr_t)addr & 0x1) { iowrite8(*(u8 *)buf, addr); @@ -1383,9 +1383,9 @@ static ssize_t tsi148_master_write(struct vme_master_resource *image, void *buf, } count32 = (count - done) & ~0x3; - if (count32 > 0) { - memcpy_toio(addr + done, buf + done, count32); - done += count32; + while (done < count32) { + iowrite32(*(u32 *)(buf + done), addr + done); + done += 4; } if ((count - done) & 0x2) { diff --git a/drivers/w1/masters/Kconfig b/drivers/w1/masters/Kconfig index efc7f075fcbe..1708b2300c7a 100644 --- a/drivers/w1/masters/Kconfig +++ b/drivers/w1/masters/Kconfig @@ -36,13 +36,12 @@ config W1_MASTER_DS2482 config W1_MASTER_MXC tristate "Freescale MXC 1-wire busmaster" - depends on W1 && ARCH_MXC + depends on ARCH_MXC || COMPILE_TEST help Say Y here to enable MXC 1-wire host config W1_MASTER_DS1WM tristate "Maxim DS1WM 1-wire busmaster" - depends on W1 help Say Y here to enable the DS1WM 1-wire driver, such as that in HP iPAQ devices like h5xxx, h2200, and ASIC3-based like diff --git a/drivers/w1/masters/ds2490.c b/drivers/w1/masters/ds2490.c index 4f7e1d770f81..7404ad3062b7 100644 --- a/drivers/w1/masters/ds2490.c +++ b/drivers/w1/masters/ds2490.c @@ -1,5 +1,5 @@ /* - * dscore.c + * ds2490.c USB to one wire bridge * * Copyright (c) 2004 Evgeniy Polyakov <zbr@ioremap.net> * @@ -28,6 +28,10 @@ #include "../w1_int.h" #include "../w1.h" +/* USB Standard */ +/* USB Control request vendor type */ +#define VENDOR 0x40 + /* COMMAND TYPE CODES */ #define CONTROL_CMD 0x00 #define COMM_CMD 0x01 @@ -107,6 +111,8 @@ #define ST_HALT 0x10 /* DS2490 is currently halted */ #define ST_IDLE 0x20 /* DS2490 is currently idle */ #define ST_EPOF 0x80 +/* Status transfer size, 16 bytes status, 16 byte result flags */ +#define ST_SIZE 0x20 /* Result Register flags */ #define RR_DETECT 0xA5 /* New device detected */ @@ -198,7 +204,7 @@ static int ds_send_control_cmd(struct ds_device *dev, u16 value, u16 index) int err; err = usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, dev->ep[EP_CONTROL]), - CONTROL_CMD, 0x40, value, index, NULL, 0, 1000); + CONTROL_CMD, VENDOR, value, index, NULL, 0, 1000); if (err < 0) { printk(KERN_ERR "Failed to send command control message %x.%x: err=%d.\n", value, index, err); @@ -213,7 +219,7 @@ static int ds_send_control_mode(struct ds_device *dev, u16 value, u16 index) int err; err = usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, dev->ep[EP_CONTROL]), - MODE_CMD, 0x40, value, index, NULL, 0, 1000); + MODE_CMD, VENDOR, value, index, NULL, 0, 1000); if (err < 0) { printk(KERN_ERR "Failed to send mode control message %x.%x: err=%d.\n", value, index, err); @@ -228,7 +234,7 @@ static int ds_send_control(struct ds_device *dev, u16 value, u16 index) int err; err = usb_control_msg(dev->udev, usb_sndctrlpipe(dev->udev, dev->ep[EP_CONTROL]), - COMM_CMD, 0x40, value, index, NULL, 0, 1000); + COMM_CMD, VENDOR, value, index, NULL, 0, 1000); if (err < 0) { printk(KERN_ERR "Failed to send control message %x.%x: err=%d.\n", value, index, err); @@ -246,7 +252,8 @@ static int ds_recv_status_nodump(struct ds_device *dev, struct ds_status *st, memset(st, 0, sizeof(*st)); count = 0; - err = usb_bulk_msg(dev->udev, usb_rcvbulkpipe(dev->udev, dev->ep[EP_STATUS]), buf, size, &count, 100); + err = usb_interrupt_msg(dev->udev, usb_rcvintpipe(dev->udev, + dev->ep[EP_STATUS]), buf, size, &count, 100); if (err < 0) { printk(KERN_ERR "Failed to read 1-wire data from 0x%x: err=%d.\n", dev->ep[EP_STATUS], err); return err; @@ -353,7 +360,7 @@ static int ds_recv_data(struct ds_device *dev, unsigned char *buf, int size) err = usb_bulk_msg(dev->udev, usb_rcvbulkpipe(dev->udev, dev->ep[EP_DATA_IN]), buf, size, &count, 1000); if (err < 0) { - u8 buf[0x20]; + u8 buf[ST_SIZE]; int count; printk(KERN_INFO "Clearing ep0x%x.\n", dev->ep[EP_DATA_IN]); @@ -398,7 +405,7 @@ int ds_stop_pulse(struct ds_device *dev, int limit) { struct ds_status st; int count = 0, err = 0; - u8 buf[0x20]; + u8 buf[ST_SIZE]; do { err = ds_send_control(dev, CTL_HALT_EXE_IDLE, 0); @@ -450,10 +457,11 @@ int ds_detect(struct ds_device *dev, struct ds_status *st) static int ds_wait_status(struct ds_device *dev, struct ds_status *st) { - u8 buf[0x20]; + u8 buf[ST_SIZE]; int err, count = 0; do { + st->status = 0; err = ds_recv_status_nodump(dev, st, buf, sizeof(buf)); #if 0 if (err >= 0) { @@ -464,7 +472,7 @@ static int ds_wait_status(struct ds_device *dev, struct ds_status *st) printk("\n"); } #endif - } while (!(buf[0x08] & ST_IDLE) && !(err < 0) && ++count < 100); + } while (!(st->status & ST_IDLE) && !(err < 0) && ++count < 100); if (err >= 16 && st->status & ST_EPOF) { printk(KERN_INFO "Resetting device after ST_EPOF.\n"); @@ -690,37 +698,106 @@ static int ds_write_block(struct ds_device *dev, u8 *buf, int len) return !(err == len); } -#if 0 - -static int ds_search(struct ds_device *dev, u64 init, u64 *buf, u8 id_number, int conditional_search) +static void ds9490r_search(void *data, struct w1_master *master, + u8 search_type, w1_slave_found_callback callback) { + /* When starting with an existing id, the first id returned will + * be that device (if it is still on the bus most likely). + * + * If the number of devices found is less than or equal to the + * search_limit, that number of IDs will be returned. If there are + * more, search_limit IDs will be returned followed by a non-zero + * discrepency value. + */ + struct ds_device *dev = data; int err; u16 value, index; struct ds_status st; + u8 st_buf[ST_SIZE]; + int search_limit; + int found = 0; + int i; - memset(buf, 0, sizeof(buf)); + /* DS18b20 spec, 13.16 ms per device, 75 per second, sleep for + * discovering 8 devices (1 bulk transfer and 1/2 FIFO size) at a time. + */ + const unsigned long jtime = msecs_to_jiffies(1000*8/75); + /* FIFO 128 bytes, bulk packet size 64, read a multiple of the + * packet size. + */ + u64 buf[2*64/8]; - err = ds_send_data(ds_dev, (unsigned char *)&init, 8); - if (err) - return err; + mutex_lock(&master->bus_mutex); - ds_wait_status(ds_dev, &st); + /* address to start searching at */ + if (ds_send_data(dev, (u8 *)&master->search_id, 8) < 0) + goto search_out; + master->search_id = 0; - value = COMM_SEARCH_ACCESS | COMM_IM | COMM_SM | COMM_F | COMM_RTS; - index = (conditional_search ? 0xEC : 0xF0) | (id_number << 8); - err = ds_send_control(ds_dev, value, index); - if (err) - return err; + value = COMM_SEARCH_ACCESS | COMM_IM | COMM_RST | COMM_SM | COMM_F | + COMM_RTS; + search_limit = master->max_slave_count; + if (search_limit > 255) + search_limit = 0; + index = search_type | (search_limit << 8); + if (ds_send_control(dev, value, index) < 0) + goto search_out; - ds_wait_status(ds_dev, &st); + do { + schedule_timeout(jtime); - err = ds_recv_data(ds_dev, (unsigned char *)buf, 8*id_number); - if (err < 0) - return err; + if (ds_recv_status_nodump(dev, &st, st_buf, sizeof(st_buf)) < + sizeof(st)) { + break; + } - return err/8; + if (st.data_in_buffer_status) { + /* Bulk in can receive partial ids, but when it does + * they fail crc and will be discarded anyway. + * That has only been seen when status in buffer + * is 0 and bulk is read anyway, so don't read + * bulk without first checking if status says there + * is data to read. + */ + err = ds_recv_data(dev, (u8 *)buf, sizeof(buf)); + if (err < 0) + break; + for (i = 0; i < err/8; ++i) { + ++found; + if (found <= search_limit) + callback(master, buf[i]); + /* can't know if there will be a discrepancy + * value after until the next id */ + if (found == search_limit) + master->search_id = buf[i]; + } + } + + if (test_bit(W1_ABORT_SEARCH, &master->flags)) + break; + } while (!(st.status & (ST_IDLE | ST_HALT))); + + /* only continue the search if some weren't found */ + if (found <= search_limit) { + master->search_id = 0; + } else if (!test_bit(W1_WARN_MAX_COUNT, &master->flags)) { + /* Only max_slave_count will be scanned in a search, + * but it will start where it left off next search + * until all ids are identified and then it will start + * over. A continued search will report the previous + * last id as the first id (provided it is still on the + * bus). + */ + dev_info(&dev->udev->dev, "%s: max_slave_count %d reached, " + "will continue next search.\n", __func__, + master->max_slave_count); + set_bit(W1_WARN_MAX_COUNT, &master->flags); + } +search_out: + mutex_unlock(&master->bus_mutex); } +#if 0 static int ds_match_access(struct ds_device *dev, u64 init) { int err; @@ -894,6 +971,7 @@ static int ds_w1_init(struct ds_device *dev) dev->master.write_block = &ds9490r_write_block; dev->master.reset_bus = &ds9490r_reset; dev->master.set_pullup = &ds9490r_set_pullup; + dev->master.search = &ds9490r_search; return w1_add_master_device(&dev->master); } @@ -910,15 +988,13 @@ static int ds_probe(struct usb_interface *intf, struct usb_endpoint_descriptor *endpoint; struct usb_host_interface *iface_desc; struct ds_device *dev; - int i, err; + int i, err, alt; - dev = kmalloc(sizeof(struct ds_device), GFP_KERNEL); + dev = kzalloc(sizeof(struct ds_device), GFP_KERNEL); if (!dev) { printk(KERN_INFO "Failed to allocate new DS9490R structure.\n"); return -ENOMEM; } - dev->spu_sleep = 0; - dev->spu_bit = 0; dev->udev = usb_get_dev(udev); if (!dev->udev) { err = -ENOMEM; @@ -928,20 +1004,25 @@ static int ds_probe(struct usb_interface *intf, usb_set_intfdata(intf, dev); - err = usb_set_interface(dev->udev, intf->altsetting[0].desc.bInterfaceNumber, 3); + err = usb_reset_configuration(dev->udev); if (err) { - printk(KERN_ERR "Failed to set alternative setting 3 for %d interface: err=%d.\n", - intf->altsetting[0].desc.bInterfaceNumber, err); + dev_err(&dev->udev->dev, + "Failed to reset configuration: err=%d.\n", err); goto err_out_clear; } - err = usb_reset_configuration(dev->udev); + /* alternative 3, 1ms interrupt (greatly speeds search), 64 byte bulk */ + alt = 3; + err = usb_set_interface(dev->udev, + intf->altsetting[alt].desc.bInterfaceNumber, alt); if (err) { - printk(KERN_ERR "Failed to reset configuration: err=%d.\n", err); + dev_err(&dev->udev->dev, "Failed to set alternative setting %d " + "for %d interface: err=%d.\n", alt, + intf->altsetting[alt].desc.bInterfaceNumber, err); goto err_out_clear; } - iface_desc = &intf->altsetting[0]; + iface_desc = &intf->altsetting[alt]; if (iface_desc->desc.bNumEndpoints != NUM_EP-1) { printk(KERN_INFO "Num endpoints=%d. It is not DS9490R.\n", iface_desc->desc.bNumEndpoints); err = -EINVAL; diff --git a/drivers/w1/masters/mxc_w1.c b/drivers/w1/masters/mxc_w1.c index 1e5d94c5afc9..67b067a3e2ab 100644 --- a/drivers/w1/masters/mxc_w1.c +++ b/drivers/w1/masters/mxc_w1.c @@ -10,24 +10,16 @@ * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. - * */ -#include <linux/module.h> -#include <linux/interrupt.h> -#include <linux/platform_device.h> #include <linux/clk.h> -#include <linux/slab.h> #include <linux/delay.h> #include <linux/io.h> +#include <linux/module.h> +#include <linux/platform_device.h> #include "../w1.h" #include "../w1_int.h" -#include "../w1_log.h" /* According to the mx27 Datasheet the reset procedure should take up to about * 1350us. We set the timeout to 500*100us = 50ms for sure */ @@ -36,13 +28,13 @@ /* * MXC W1 Register offsets */ -#define MXC_W1_CONTROL 0x00 -#define MXC_W1_TIME_DIVIDER 0x02 -#define MXC_W1_RESET 0x04 -#define MXC_W1_COMMAND 0x06 -#define MXC_W1_TXRX 0x08 -#define MXC_W1_INTERRUPT 0x0A -#define MXC_W1_INTERRUPT_EN 0x0C +#define MXC_W1_CONTROL 0x00 +# define MXC_W1_CONTROL_RDST BIT(3) +# define MXC_W1_CONTROL_WR(x) BIT(5 - (x)) +# define MXC_W1_CONTROL_PST BIT(6) +# define MXC_W1_CONTROL_RPP BIT(7) +#define MXC_W1_TIME_DIVIDER 0x02 +#define MXC_W1_RESET 0x04 struct mxc_w1_device { void __iomem *regs; @@ -61,12 +53,12 @@ static u8 mxc_w1_ds2_reset_bus(void *data) unsigned int timeout_cnt = 0; struct mxc_w1_device *dev = data; - __raw_writeb(0x80, (dev->regs + MXC_W1_CONTROL)); + writeb(MXC_W1_CONTROL_RPP, (dev->regs + MXC_W1_CONTROL)); while (1) { - reg_val = __raw_readb(dev->regs + MXC_W1_CONTROL); + reg_val = readb(dev->regs + MXC_W1_CONTROL); - if (((reg_val >> 7) & 0x1) == 0 || + if (!(reg_val & MXC_W1_CONTROL_RPP) || timeout_cnt > MXC_W1_RESET_TIMEOUT) break; else @@ -74,7 +66,7 @@ static u8 mxc_w1_ds2_reset_bus(void *data) udelay(100); } - return (reg_val >> 7) & 0x1; + return !!(reg_val & MXC_W1_CONTROL_PST); } /* @@ -90,16 +82,16 @@ static u8 mxc_w1_ds2_touch_bit(void *data, u8 bit) * datasheet. */ - __raw_writeb((1 << (5 - bit)), ctrl_addr); + writeb(MXC_W1_CONTROL_WR(bit), ctrl_addr); while (timeout_cnt--) { - if (!((__raw_readb(ctrl_addr) >> (5 - bit)) & 0x1)) + if (!(readb(ctrl_addr) & MXC_W1_CONTROL_WR(bit))) break; udelay(1); } - return ((__raw_readb(ctrl_addr)) >> 3) & 0x1; + return !!(readb(ctrl_addr) & MXC_W1_CONTROL_RDST); } static int mxc_w1_probe(struct platform_device *pdev) @@ -139,7 +131,7 @@ static int mxc_w1_probe(struct platform_device *pdev) if (err) return err; - __raw_writeb(clkdiv - 1, mdev->regs + MXC_W1_TIME_DIVIDER); + writeb(clkdiv - 1, mdev->regs + MXC_W1_TIME_DIVIDER); mdev->bus_master.data = mdev; mdev->bus_master.reset_bus = mxc_w1_ds2_reset_bus; @@ -177,6 +169,7 @@ MODULE_DEVICE_TABLE(of, mxc_w1_dt_ids); static struct platform_driver mxc_w1_driver = { .driver = { .name = "mxc_w1", + .owner = THIS_MODULE, .of_match_table = mxc_w1_dt_ids, }, .probe = mxc_w1_probe, diff --git a/drivers/w1/masters/w1-gpio.c b/drivers/w1/masters/w1-gpio.c index 9709b8b484ba..1d111e56c8c8 100644 --- a/drivers/w1/masters/w1-gpio.c +++ b/drivers/w1/masters/w1-gpio.c @@ -89,11 +89,22 @@ static int w1_gpio_probe_dt(struct platform_device *pdev) pdata->is_open_drain = 1; gpio = of_get_gpio(np, 0); - if (gpio < 0) + if (gpio < 0) { + if (gpio != -EPROBE_DEFER) + dev_err(&pdev->dev, + "Failed to parse gpio property for data pin (%d)\n", + gpio); + return gpio; + } pdata->pin = gpio; - pdata->ext_pullup_enable_pin = of_get_gpio(np, 1); + gpio = of_get_gpio(np, 1); + if (gpio == -EPROBE_DEFER) + return gpio; + /* ignore other errors as the pullup gpio is optional */ + pdata->ext_pullup_enable_pin = gpio; + pdev->dev.platform_data = pdata; return 0; @@ -107,10 +118,8 @@ static int w1_gpio_probe(struct platform_device *pdev) if (of_have_populated_dt()) { err = w1_gpio_probe_dt(pdev); - if (err < 0) { - dev_err(&pdev->dev, "Failed to parse DT\n"); + if (err < 0) return err; - } } pdata = dev_get_platdata(&pdev->dev); diff --git a/drivers/w1/slaves/Kconfig b/drivers/w1/slaves/Kconfig index 5e6a3c9e510b..1cdce80b6abf 100644 --- a/drivers/w1/slaves/Kconfig +++ b/drivers/w1/slaves/Kconfig @@ -72,7 +72,6 @@ config W1_SLAVE_DS2433_CRC config W1_SLAVE_DS2760 tristate "Dallas 2760 battery monitor chip (HP iPAQ & others)" - depends on W1 help If you enable this you will have the DS2760 battery monitor chip support. @@ -85,7 +84,6 @@ config W1_SLAVE_DS2760 config W1_SLAVE_DS2780 tristate "Dallas 2780 battery monitor chip" - depends on W1 help If you enable this you will have the DS2780 battery monitor chip support. @@ -98,7 +96,6 @@ config W1_SLAVE_DS2780 config W1_SLAVE_DS2781 tristate "Dallas 2781 battery monitor chip" - depends on W1 help If you enable this you will have the DS2781 battery monitor chip support. @@ -111,7 +108,6 @@ config W1_SLAVE_DS2781 config W1_SLAVE_DS28E04 tristate "4096-Bit Addressable 1-Wire EEPROM with PIO (DS28E04-100)" - depends on W1 select CRC16 help If you enable this you will have the DS28E04-100 @@ -124,7 +120,6 @@ config W1_SLAVE_DS28E04 config W1_SLAVE_BQ27000 tristate "BQ27000 slave support" - depends on W1 help Say Y here if you want to use a hdq bq27000 slave support. diff --git a/drivers/w1/slaves/w1_therm.c b/drivers/w1/slaves/w1_therm.c index 8b5ff33f72cf..1f11a20a8ab9 100644 --- a/drivers/w1/slaves/w1_therm.c +++ b/drivers/w1/slaves/w1_therm.c @@ -27,6 +27,7 @@ #include <linux/sched.h> #include <linux/device.h> #include <linux/types.h> +#include <linux/slab.h> #include <linux/delay.h> #include "../w1.h" @@ -58,6 +59,19 @@ MODULE_ALIAS("w1-family-" __stringify(W1_THERM_DS28EA00)); static int w1_strong_pullup = 1; module_param_named(strong_pullup, w1_strong_pullup, int, 0); +static int w1_therm_add_slave(struct w1_slave *sl) +{ + sl->family_data = kzalloc(9, GFP_KERNEL); + if (!sl->family_data) + return -ENOMEM; + return 0; +} + +static void w1_therm_remove_slave(struct w1_slave *sl) +{ + kfree(sl->family_data); + sl->family_data = NULL; +} static ssize_t w1_slave_show(struct device *device, struct device_attribute *attr, char *buf); @@ -71,6 +85,8 @@ static struct attribute *w1_therm_attrs[] = { ATTRIBUTE_GROUPS(w1_therm); static struct w1_family_ops w1_therm_fops = { + .add_slave = w1_therm_add_slave, + .remove_slave = w1_therm_remove_slave, .groups = w1_therm_groups, }; @@ -253,12 +269,13 @@ static ssize_t w1_slave_show(struct device *device, c -= snprintf(buf + PAGE_SIZE - c, c, ": crc=%02x %s\n", crc, (verdict) ? "YES" : "NO"); if (verdict) - memcpy(sl->rom, rom, sizeof(sl->rom)); + memcpy(sl->family_data, rom, sizeof(rom)); else dev_warn(device, "Read failed CRC check\n"); for (i = 0; i < 9; ++i) - c -= snprintf(buf + PAGE_SIZE - c, c, "%02x ", sl->rom[i]); + c -= snprintf(buf + PAGE_SIZE - c, c, "%02x ", + ((u8 *)sl->family_data)[i]); c -= snprintf(buf + PAGE_SIZE - c, c, "t=%d\n", w1_convert_temp(rom, sl->family->fid)); diff --git a/drivers/w1/w1.c b/drivers/w1/w1.c index 66efa96c4603..b96f61b15dc6 100644 --- a/drivers/w1/w1.c +++ b/drivers/w1/w1.c @@ -46,18 +46,29 @@ MODULE_AUTHOR("Evgeniy Polyakov <zbr@ioremap.net>"); MODULE_DESCRIPTION("Driver for 1-wire Dallas network protocol."); static int w1_timeout = 10; -int w1_max_slave_count = 10; +int w1_max_slave_count = 64; int w1_max_slave_ttl = 10; module_param_named(timeout, w1_timeout, int, 0); +MODULE_PARM_DESC(timeout, "time in seconds between automatic slave searches"); +/* A search stops when w1_max_slave_count devices have been found in that + * search. The next search will start over and detect the same set of devices + * on a static 1-wire bus. Memory is not allocated based on this number, just + * on the number of devices known to the kernel. Having a high number does not + * consume additional resources. As a special case, if there is only one + * device on the network and w1_max_slave_count is set to 1, the device id can + * be read directly skipping the normal slower search process. + */ module_param_named(max_slave_count, w1_max_slave_count, int, 0); +MODULE_PARM_DESC(max_slave_count, + "maximum number of slaves detected in a search"); module_param_named(slave_ttl, w1_max_slave_ttl, int, 0); +MODULE_PARM_DESC(slave_ttl, + "Number of searches not seeing a slave before it will be removed"); DEFINE_MUTEX(w1_mlock); LIST_HEAD(w1_masters); -static int w1_attach_slave_device(struct w1_master *dev, struct w1_reg_num *rn); - static int w1_master_match(struct device *dev, struct device_driver *drv) { return 1; @@ -81,19 +92,10 @@ static void w1_slave_release(struct device *dev) { struct w1_slave *sl = dev_to_w1_slave(dev); - dev_dbg(dev, "%s: Releasing %s.\n", __func__, sl->name); - - while (atomic_read(&sl->refcnt)) { - dev_dbg(dev, "Waiting for %s to become free: refcnt=%d.\n", - sl->name, atomic_read(&sl->refcnt)); - if (msleep_interruptible(1000)) - flush_signals(current); - } + dev_dbg(dev, "%s: Releasing %s [%p]\n", __func__, sl->name, sl); w1_family_put(sl->family); sl->master->slave_count--; - - complete(&sl->released); } static ssize_t name_show(struct device *dev, struct device_attribute *attr, char *buf) @@ -243,7 +245,9 @@ static ssize_t w1_master_attribute_store_search(struct device * dev, mutex_lock(&md->mutex); md->search_count = tmp; mutex_unlock(&md->mutex); - wake_up_process(md->thread); + /* Only wake if it is going to be searching. */ + if (tmp) + wake_up_process(md->thread); return count; } @@ -277,7 +281,6 @@ static ssize_t w1_master_attribute_store_pullup(struct device *dev, mutex_lock(&md->mutex); md->enable_pullup = tmp; mutex_unlock(&md->mutex); - wake_up_process(md->thread); return count; } @@ -314,6 +317,24 @@ static ssize_t w1_master_attribute_show_timeout(struct device *dev, struct devic return count; } +static ssize_t w1_master_attribute_store_max_slave_count(struct device *dev, + struct device_attribute *attr, const char *buf, size_t count) +{ + int tmp; + struct w1_master *md = dev_to_w1_master(dev); + + if (kstrtoint(buf, 0, &tmp) == -EINVAL || tmp < 1) + return -EINVAL; + + mutex_lock(&md->mutex); + md->max_slave_count = tmp; + /* allow each time the max_slave_count is updated */ + clear_bit(W1_WARN_MAX_COUNT, &md->flags); + mutex_unlock(&md->mutex); + + return count; +} + static ssize_t w1_master_attribute_show_max_slave_count(struct device *dev, struct device_attribute *attr, char *buf) { struct w1_master *md = dev_to_w1_master(dev); @@ -352,23 +373,20 @@ static ssize_t w1_master_attribute_show_slaves(struct device *dev, { struct w1_master *md = dev_to_w1_master(dev); int c = PAGE_SIZE; + struct list_head *ent, *n; + struct w1_slave *sl = NULL; - mutex_lock(&md->mutex); - - if (md->slave_count == 0) - c -= snprintf(buf + PAGE_SIZE - c, c, "not found.\n"); - else { - struct list_head *ent, *n; - struct w1_slave *sl; + mutex_lock(&md->list_mutex); - list_for_each_safe(ent, n, &md->slist) { - sl = list_entry(ent, struct w1_slave, w1_slave_entry); + list_for_each_safe(ent, n, &md->slist) { + sl = list_entry(ent, struct w1_slave, w1_slave_entry); - c -= snprintf(buf + PAGE_SIZE - c, c, "%s\n", sl->name); - } + c -= snprintf(buf + PAGE_SIZE - c, c, "%s\n", sl->name); } + if (!sl) + c -= snprintf(buf + PAGE_SIZE - c, c, "not found.\n"); - mutex_unlock(&md->mutex); + mutex_unlock(&md->list_mutex); return PAGE_SIZE - c; } @@ -422,19 +440,22 @@ static int w1_atoreg_num(struct device *dev, const char *buf, size_t count, } /* Searches the slaves in the w1_master and returns a pointer or NULL. - * Note: must hold the mutex + * Note: must not hold list_mutex */ -static struct w1_slave *w1_slave_search_device(struct w1_master *dev, +struct w1_slave *w1_slave_search_device(struct w1_master *dev, struct w1_reg_num *rn) { struct w1_slave *sl; + mutex_lock(&dev->list_mutex); list_for_each_entry(sl, &dev->slist, w1_slave_entry) { if (sl->reg_num.family == rn->family && sl->reg_num.id == rn->id && sl->reg_num.crc == rn->crc) { + mutex_unlock(&dev->list_mutex); return sl; } } + mutex_unlock(&dev->list_mutex); return NULL; } @@ -491,7 +512,10 @@ static ssize_t w1_master_attribute_store_remove(struct device *dev, mutex_lock(&md->mutex); sl = w1_slave_search_device(md, &rn); if (sl) { - w1_slave_detach(sl); + result = w1_slave_detach(sl); + /* refcnt 0 means it was detached in the call */ + if (result == 0) + result = count; } else { dev_info(dev, "Device %02x-%012llx doesn't exists\n", rn.family, (unsigned long long)rn.id); @@ -516,7 +540,7 @@ static ssize_t w1_master_attribute_store_remove(struct device *dev, static W1_MASTER_ATTR_RO(name, S_IRUGO); static W1_MASTER_ATTR_RO(slaves, S_IRUGO); static W1_MASTER_ATTR_RO(slave_count, S_IRUGO); -static W1_MASTER_ATTR_RO(max_slave_count, S_IRUGO); +static W1_MASTER_ATTR_RW(max_slave_count, S_IRUGO | S_IWUSR | S_IWGRP); static W1_MASTER_ATTR_RO(attempts, S_IRUGO); static W1_MASTER_ATTR_RO(timeout, S_IRUGO); static W1_MASTER_ATTR_RO(pointer, S_IRUGO); @@ -686,12 +710,14 @@ static int __w1_attach_slave_device(struct w1_slave *sl) dev_set_uevent_suppress(&sl->dev, false); kobject_uevent(&sl->dev.kobj, KOBJ_ADD); + mutex_lock(&sl->master->list_mutex); list_add_tail(&sl->w1_slave_entry, &sl->master->slist); + mutex_unlock(&sl->master->list_mutex); return 0; } -static int w1_attach_slave_device(struct w1_master *dev, struct w1_reg_num *rn) +int w1_attach_slave_device(struct w1_master *dev, struct w1_reg_num *rn) { struct w1_slave *sl; struct w1_family *f; @@ -713,8 +739,8 @@ static int w1_attach_slave_device(struct w1_master *dev, struct w1_reg_num *rn) memset(&msg, 0, sizeof(msg)); memcpy(&sl->reg_num, rn, sizeof(sl->reg_num)); - atomic_set(&sl->refcnt, 0); - init_completion(&sl->released); + atomic_set(&sl->refcnt, 1); + atomic_inc(&sl->master->refcnt); /* slave modules need to be loaded in a context with unlocked mutex */ mutex_unlock(&dev->mutex); @@ -754,23 +780,48 @@ static int w1_attach_slave_device(struct w1_master *dev, struct w1_reg_num *rn) return 0; } -void w1_slave_detach(struct w1_slave *sl) +int w1_unref_slave(struct w1_slave *sl) { - struct w1_netlink_msg msg; - - dev_dbg(&sl->dev, "%s: detaching %s [%p].\n", __func__, sl->name, sl); - - list_del(&sl->w1_slave_entry); - - memset(&msg, 0, sizeof(msg)); - memcpy(msg.id.id, &sl->reg_num, sizeof(msg.id)); - msg.type = W1_SLAVE_REMOVE; - w1_netlink_send(sl->master, &msg); - - device_unregister(&sl->dev); + struct w1_master *dev = sl->master; + int refcnt; + mutex_lock(&dev->list_mutex); + refcnt = atomic_sub_return(1, &sl->refcnt); + if (refcnt == 0) { + struct w1_netlink_msg msg; + + dev_dbg(&sl->dev, "%s: detaching %s [%p].\n", __func__, + sl->name, sl); + + list_del(&sl->w1_slave_entry); + + memset(&msg, 0, sizeof(msg)); + memcpy(msg.id.id, &sl->reg_num, sizeof(msg.id)); + msg.type = W1_SLAVE_REMOVE; + w1_netlink_send(sl->master, &msg); + + device_unregister(&sl->dev); + #ifdef DEBUG + memset(sl, 0, sizeof(*sl)); + #endif + kfree(sl); + } + atomic_dec(&dev->refcnt); + mutex_unlock(&dev->list_mutex); + return refcnt; +} - wait_for_completion(&sl->released); - kfree(sl); +int w1_slave_detach(struct w1_slave *sl) +{ + /* Only detach a slave once as it decreases the refcnt each time. */ + int destroy_now; + mutex_lock(&sl->master->list_mutex); + destroy_now = !test_bit(W1_SLAVE_DETACH, &sl->flags); + set_bit(W1_SLAVE_DETACH, &sl->flags); + mutex_unlock(&sl->master->list_mutex); + + if (destroy_now) + destroy_now = !w1_unref_slave(sl); + return destroy_now ? 0 : -EBUSY; } struct w1_master *w1_search_master_id(u32 id) @@ -799,7 +850,7 @@ struct w1_slave *w1_search_slave(struct w1_reg_num *id) mutex_lock(&w1_mlock); list_for_each_entry(dev, &w1_masters, w1_master_entry) { - mutex_lock(&dev->mutex); + mutex_lock(&dev->list_mutex); list_for_each_entry(sl, &dev->slist, w1_slave_entry) { if (sl->reg_num.family == id->family && sl->reg_num.id == id->id && @@ -810,7 +861,7 @@ struct w1_slave *w1_search_slave(struct w1_reg_num *id) break; } } - mutex_unlock(&dev->mutex); + mutex_unlock(&dev->list_mutex); if (found) break; @@ -830,6 +881,7 @@ void w1_reconnect_slaves(struct w1_family *f, int attach) dev_dbg(&dev->dev, "Reconnecting slaves in device %s " "for family %02x.\n", dev->name, f->fid); mutex_lock(&dev->mutex); + mutex_lock(&dev->list_mutex); list_for_each_entry_safe(sl, sln, &dev->slist, w1_slave_entry) { /* If it is a new family, slaves with the default * family driver and are that family will be @@ -841,14 +893,19 @@ void w1_reconnect_slaves(struct w1_family *f, int attach) (!attach && sl->family->fid == f->fid)) { struct w1_reg_num rn; + mutex_unlock(&dev->list_mutex); memcpy(&rn, &sl->reg_num, sizeof(rn)); - w1_slave_detach(sl); - - w1_attach_slave_device(dev, &rn); + /* If it was already in use let the automatic + * scan pick it up again later. + */ + if (!w1_slave_detach(sl)) + w1_attach_slave_device(dev, &rn); + mutex_lock(&dev->list_mutex); } } dev_dbg(&dev->dev, "Reconnecting slaves in device %s " "has been finished.\n", dev->name); + mutex_unlock(&dev->list_mutex); mutex_unlock(&dev->mutex); } mutex_unlock(&w1_mlock); @@ -876,7 +933,12 @@ void w1_slave_found(struct w1_master *dev, u64 rn) } /** - * Performs a ROM Search & registers any devices found. + * w1_search() - Performs a ROM Search & registers any devices found. + * @dev: The master device to search + * @search_type: W1_SEARCH to search all devices, or W1_ALARM_SEARCH + * to return only devices in the alarmed state + * @cb: Function to call when a device is found + * * The 1-wire search is a simple binary tree search. * For each bit of the address, we read two bits and write one bit. * The bit written will put to sleep all devies that don't match that bit. @@ -886,8 +948,6 @@ void w1_slave_found(struct w1_master *dev, u64 rn) * * See "Application note 187 1-wire search algorithm" at www.maxim-ic.com * - * @dev The master device to search - * @cb Function to call when a device is found */ void w1_search(struct w1_master *dev, u8 search_type, w1_slave_found_callback cb) { @@ -898,7 +958,8 @@ void w1_search(struct w1_master *dev, u8 search_type, w1_slave_found_callback cb u8 triplet_ret = 0; search_bit = 0; - rn = last_rn = 0; + rn = dev->search_id; + last_rn = 0; last_device = 0; last_zero = -1; @@ -945,7 +1006,7 @@ void w1_search(struct w1_master *dev, u8 search_type, w1_slave_found_callback cb else search_bit = ((last_rn >> i) & 0x1); - /** Read two bits and write one bit */ + /* Read two bits and write one bit */ triplet_ret = w1_triplet(dev, search_bit); /* quit if no device responded */ @@ -960,8 +1021,7 @@ void w1_search(struct w1_master *dev, u8 search_type, w1_slave_found_callback cb tmp64 = (triplet_ret >> 2); rn |= (tmp64 << i); - /* ensure we're called from kthread and not by netlink callback */ - if (!dev->priv && kthread_should_stop()) { + if (test_bit(W1_ABORT_SEARCH, &dev->flags)) { mutex_unlock(&dev->bus_mutex); dev_dbg(&dev->dev, "Abort w1_search\n"); return; @@ -970,11 +1030,30 @@ void w1_search(struct w1_master *dev, u8 search_type, w1_slave_found_callback cb mutex_unlock(&dev->bus_mutex); if ( (triplet_ret & 0x03) != 0x03 ) { - if ( (desc_bit == last_zero) || (last_zero < 0)) + if ((desc_bit == last_zero) || (last_zero < 0)) { last_device = 1; + dev->search_id = 0; + } else { + dev->search_id = rn; + } desc_bit = last_zero; cb(dev, rn); } + + if (!last_device && slave_count == dev->max_slave_count && + !test_bit(W1_WARN_MAX_COUNT, &dev->flags)) { + /* Only max_slave_count will be scanned in a search, + * but it will start where it left off next search + * until all ids are identified and then it will start + * over. A continued search will report the previous + * last id as the first id (provided it is still on the + * bus). + */ + dev_info(&dev->dev, "%s: max_slave_count %d reached, " + "will continue next search.\n", __func__, + dev->max_slave_count); + set_bit(W1_WARN_MAX_COUNT, &dev->flags); + } } } @@ -983,17 +1062,24 @@ void w1_search_process_cb(struct w1_master *dev, u8 search_type, { struct w1_slave *sl, *sln; + mutex_lock(&dev->list_mutex); list_for_each_entry(sl, &dev->slist, w1_slave_entry) clear_bit(W1_SLAVE_ACTIVE, &sl->flags); + mutex_unlock(&dev->list_mutex); w1_search_devices(dev, search_type, cb); + mutex_lock(&dev->list_mutex); list_for_each_entry_safe(sl, sln, &dev->slist, w1_slave_entry) { - if (!test_bit(W1_SLAVE_ACTIVE, &sl->flags) && !--sl->ttl) + if (!test_bit(W1_SLAVE_ACTIVE, &sl->flags) && !--sl->ttl) { + mutex_unlock(&dev->list_mutex); w1_slave_detach(sl); + mutex_lock(&dev->list_mutex); + } else if (test_bit(W1_SLAVE_ACTIVE, &sl->flags)) sl->ttl = dev->slave_ttl; } + mutex_unlock(&dev->list_mutex); if (dev->search_count > 0) dev->search_count--; @@ -1004,6 +1090,32 @@ static void w1_search_process(struct w1_master *dev, u8 search_type) w1_search_process_cb(dev, search_type, w1_slave_found); } +/** + * w1_process_callbacks() - execute each dev->async_list callback entry + * @dev: w1_master device + * + * Return: 1 if there were commands to executed 0 otherwise + */ +int w1_process_callbacks(struct w1_master *dev) +{ + int ret = 0; + struct w1_async_cmd *async_cmd, *async_n; + + /* The list can be added to in another thread, loop until it is empty */ + while (!list_empty(&dev->async_list)) { + list_for_each_entry_safe(async_cmd, async_n, &dev->async_list, + async_entry) { + /* drop the lock, if it is a search it can take a long + * time */ + mutex_unlock(&dev->list_mutex); + async_cmd->cb(dev, async_cmd); + ret = 1; + mutex_lock(&dev->list_mutex); + } + } + return ret; +} + int w1_process(void *data) { struct w1_master *dev = (struct w1_master *) data; @@ -1011,23 +1123,46 @@ int w1_process(void *data) * time can be calculated in jiffies once. */ const unsigned long jtime = msecs_to_jiffies(w1_timeout * 1000); + /* remainder if it woke up early */ + unsigned long jremain = 0; - while (!kthread_should_stop()) { - if (dev->search_count) { + for (;;) { + + if (!jremain && dev->search_count) { mutex_lock(&dev->mutex); w1_search_process(dev, W1_SEARCH); mutex_unlock(&dev->mutex); } + mutex_lock(&dev->list_mutex); + /* Note, w1_process_callback drops the lock while processing, + * but locks it again before returning. + */ + if (!w1_process_callbacks(dev) && jremain) { + /* a wake up is either to stop the thread, process + * callbacks, or search, it isn't process callbacks, so + * schedule a search. + */ + jremain = 1; + } + try_to_freeze(); __set_current_state(TASK_INTERRUPTIBLE); + /* hold list_mutex until after interruptible to prevent loosing + * the wakeup signal when async_cmd is added. + */ + mutex_unlock(&dev->list_mutex); + if (kthread_should_stop()) break; /* Only sleep when the search is active. */ - if (dev->search_count) - schedule_timeout(jtime); + if (dev->search_count) { + if (!jremain) + jremain = jtime; + jremain = schedule_timeout(jremain); + } else schedule(); } diff --git a/drivers/w1/w1.h b/drivers/w1/w1.h index ca8081a101d6..734dab7fc687 100644 --- a/drivers/w1/w1.h +++ b/drivers/w1/w1.h @@ -22,6 +22,13 @@ #ifndef __W1_H #define __W1_H +/** + * struct w1_reg_num - broken out slave device id + * + * @family: identifies the type of device + * @id: along with family is the unique device id + * @crc: checksum of the other bytes + */ struct w1_reg_num { #if defined(__LITTLE_ENDIAN_BITFIELD) @@ -58,7 +65,24 @@ struct w1_reg_num #define W1_RESUME_CMD 0xA5 #define W1_SLAVE_ACTIVE 0 +#define W1_SLAVE_DETACH 1 +/** + * struct w1_slave - holds a single slave device on the bus + * + * @owner: Points to the one wire "wire" kernel module. + * @name: Device id is ascii. + * @w1_slave_entry: data for the linked list + * @reg_num: the slave id in binary + * @refcnt: reference count, delete when 0 + * @flags: bit flags for W1_SLAVE_ACTIVE W1_SLAVE_DETACH + * @ttl: decrement per search this slave isn't found, deatch at 0 + * @master: bus which this slave is on + * @family: module for device family type + * @family_data: pointer for use by the family module + * @dev: kernel device identifier + * + */ struct w1_slave { struct module *owner; @@ -66,7 +90,6 @@ struct w1_slave struct list_head w1_slave_entry; struct w1_reg_num reg_num; atomic_t refcnt; - u8 rom[9]; int ttl; unsigned long flags; @@ -74,99 +97,146 @@ struct w1_slave struct w1_family *family; void *family_data; struct device dev; - struct completion released; }; typedef void (*w1_slave_found_callback)(struct w1_master *, u64); /** + * struct w1_bus_master - operations available on a bus master + * + * @data: the first parameter in all the functions below + * + * @read_bit: Sample the line level @return the level read (0 or 1) + * + * @write_bit: Sets the line level + * + * @touch_bit: the lowest-level function for devices that really support the + * 1-wire protocol. + * touch_bit(0) = write-0 cycle + * touch_bit(1) = write-1 / read cycle + * @return the bit read (0 or 1) + * + * @read_byte: Reads a bytes. Same as 8 touch_bit(1) calls. + * @return the byte read + * + * @write_byte: Writes a byte. Same as 8 touch_bit(x) calls. + * + * @read_block: Same as a series of read_byte() calls + * @return the number of bytes read + * + * @write_block: Same as a series of write_byte() calls + * + * @triplet: Combines two reads and a smart write for ROM searches + * @return bit0=Id bit1=comp_id bit2=dir_taken + * + * @reset_bus: long write-0 with a read for the presence pulse detection + * @return -1=Error, 0=Device present, 1=No device present + * + * @set_pullup: Put out a strong pull-up pulse of the specified duration. + * @return -1=Error, 0=completed + * + * @search: Really nice hardware can handles the different types of ROM search + * w1_master* is passed to the slave found callback. + * u8 is search_type, W1_SEARCH or W1_ALARM_SEARCH + * * Note: read_bit and write_bit are very low level functions and should only * be used with hardware that doesn't really support 1-wire operations, * like a parallel/serial port. * Either define read_bit and write_bit OR define, at minimum, touch_bit and * reset_bus. + * */ struct w1_bus_master { - /** the first parameter in all the functions below */ void *data; - /** - * Sample the line level - * @return the level read (0 or 1) - */ u8 (*read_bit)(void *); - /** Sets the line level */ void (*write_bit)(void *, u8); - /** - * touch_bit is the lowest-level function for devices that really - * support the 1-wire protocol. - * touch_bit(0) = write-0 cycle - * touch_bit(1) = write-1 / read cycle - * @return the bit read (0 or 1) - */ u8 (*touch_bit)(void *, u8); - /** - * Reads a bytes. Same as 8 touch_bit(1) calls. - * @return the byte read - */ u8 (*read_byte)(void *); - /** - * Writes a byte. Same as 8 touch_bit(x) calls. - */ void (*write_byte)(void *, u8); - /** - * Same as a series of read_byte() calls - * @return the number of bytes read - */ u8 (*read_block)(void *, u8 *, int); - /** Same as a series of write_byte() calls */ void (*write_block)(void *, const u8 *, int); - /** - * Combines two reads and a smart write for ROM searches - * @return bit0=Id bit1=comp_id bit2=dir_taken - */ u8 (*triplet)(void *, u8); - /** - * long write-0 with a read for the presence pulse detection - * @return -1=Error, 0=Device present, 1=No device present - */ u8 (*reset_bus)(void *); - /** - * Put out a strong pull-up pulse of the specified duration. - * @return -1=Error, 0=completed - */ u8 (*set_pullup)(void *, int); - /** Really nice hardware can handles the different types of ROM search - * w1_master* is passed to the slave found callback. - */ void (*search)(void *, struct w1_master *, u8, w1_slave_found_callback); }; +/** + * enum w1_master_flags - bitfields used in w1_master.flags + * @W1_ABORT_SEARCH: abort searching early on shutdown + * @W1_WARN_MAX_COUNT: limit warning when the maximum count is reached + */ +enum w1_master_flags { + W1_ABORT_SEARCH = 0, + W1_WARN_MAX_COUNT = 1, +}; + +/** + * struct w1_master - one per bus master + * @w1_master_entry: master linked list + * @owner: module owner + * @name: dynamically allocate bus name + * @list_mutex: protect slist and async_list + * @slist: linked list of slaves + * @async_list: linked list of netlink commands to execute + * @max_slave_count: maximum number of slaves to search for at a time + * @slave_count: current number of slaves known + * @attempts: number of searches ran + * @slave_ttl: number of searches before a slave is timed out + * @initialized: prevent init/removal race conditions + * @id: w1 bus number + * @search_count: number of automatic searches to run, -1 unlimited + * @search_id: allows continuing a search + * @refcnt: reference count + * @priv: private data storage + * @priv_size: size allocated + * @enable_pullup: allows a strong pullup + * @pullup_duration: time for the next strong pullup + * @flags: one of w1_master_flags + * @thread: thread for bus search and netlink commands + * @mutex: protect most of w1_master + * @bus_mutex: pretect concurrent bus access + * @driver: sysfs driver + * @dev: sysfs device + * @bus_master: io operations available + * @seq: sequence number used for netlink broadcasts + * @portid: destination for the current netlink command + */ struct w1_master { struct list_head w1_master_entry; struct module *owner; unsigned char name[W1_MAXNAMELEN]; + /* list_mutex protects just slist and async_list so slaves can be + * searched for and async commands added while the master has + * w1_master.mutex locked and is operating on the bus. + * lock order w1_mlock, w1_master.mutex, w1_master.list_mutex + */ + struct mutex list_mutex; struct list_head slist; + struct list_head async_list; int max_slave_count, slave_count; unsigned long attempts; int slave_ttl; int initialized; u32 id; int search_count; + /* id to start searching on, to continue a search or 0 to restart */ + u64 search_id; atomic_t refcnt; @@ -178,6 +248,8 @@ struct w1_master /** 5V strong pullup duration in milliseconds, zero disabled. */ int pullup_duration; + long flags; + struct task_struct *thread; struct mutex mutex; struct mutex bus_mutex; @@ -188,16 +260,41 @@ struct w1_master struct w1_bus_master *bus_master; u32 seq; + /* port id to send netlink responses to. The value is temporarily + * stored here while processing a message, set after locking the + * mutex, zero before unlocking the mutex. + */ + u32 portid; +}; + +/** + * struct w1_async_cmd - execute callback from the w1_process kthread + * @async_entry: link entry + * @cb: callback function, must list_del and destroy this list before + * returning + * + * When inserted into the w1_master async_list, w1_process will execute + * the callback. Embed this into the structure with the command details. + */ +struct w1_async_cmd { + struct list_head async_entry; + void (*cb)(struct w1_master *dev, struct w1_async_cmd *async_cmd); }; int w1_create_master_attributes(struct w1_master *); void w1_destroy_master_attributes(struct w1_master *master); void w1_search(struct w1_master *dev, u8 search_type, w1_slave_found_callback cb); void w1_search_devices(struct w1_master *dev, u8 search_type, w1_slave_found_callback cb); +/* call w1_unref_slave to release the reference counts w1_search_slave added */ struct w1_slave *w1_search_slave(struct w1_reg_num *id); +/* decrements the reference on sl->master and sl, and cleans up if zero + * returns the reference count after it has been decremented */ +int w1_unref_slave(struct w1_slave *sl); void w1_slave_found(struct w1_master *dev, u64 rn); void w1_search_process_cb(struct w1_master *dev, u8 search_type, w1_slave_found_callback cb); +struct w1_slave *w1_slave_search_device(struct w1_master *dev, + struct w1_reg_num *rn); struct w1_master *w1_search_master_id(u32 id); /* Disconnect and reconnect devices in the given family. Used for finding @@ -206,7 +303,9 @@ struct w1_master *w1_search_master_id(u32 id); * has just been registered, to 0 when it has been unregistered. */ void w1_reconnect_slaves(struct w1_family *f, int attach); -void w1_slave_detach(struct w1_slave *sl); +int w1_attach_slave_device(struct w1_master *dev, struct w1_reg_num *rn); +/* 0 success, otherwise EBUSY */ +int w1_slave_detach(struct w1_slave *sl); u8 w1_triplet(struct w1_master *dev, int bdir); void w1_write_8(struct w1_master *, u8); @@ -242,6 +341,7 @@ extern int w1_max_slave_ttl; extern struct list_head w1_masters; extern struct mutex w1_mlock; +extern int w1_process_callbacks(struct w1_master *dev); extern int w1_process(void *); #endif /* __KERNEL__ */ diff --git a/drivers/w1/w1_family.c b/drivers/w1/w1_family.c index e9309778ee72..3bff6b37b472 100644 --- a/drivers/w1/w1_family.c +++ b/drivers/w1/w1_family.c @@ -31,6 +31,10 @@ DEFINE_SPINLOCK(w1_flock); static LIST_HEAD(w1_families); +/** + * w1_register_family() - register a device family driver + * @newf: family to register + */ int w1_register_family(struct w1_family *newf) { struct list_head *ent, *n; @@ -59,6 +63,10 @@ int w1_register_family(struct w1_family *newf) return ret; } +/** + * w1_unregister_family() - unregister a device family driver + * @fent: family to unregister + */ void w1_unregister_family(struct w1_family *fent) { struct list_head *ent, *n; diff --git a/drivers/w1/w1_family.h b/drivers/w1/w1_family.h index 4ad0e81b6404..26ca1343055b 100644 --- a/drivers/w1/w1_family.h +++ b/drivers/w1/w1_family.h @@ -48,6 +48,12 @@ struct w1_slave; +/** + * struct w1_family_ops - operations for a family type + * @add_slave: add_slave + * @remove_slave: remove_slave + * @groups: sysfs group + */ struct w1_family_ops { int (* add_slave)(struct w1_slave *); @@ -55,6 +61,13 @@ struct w1_family_ops const struct attribute_group **groups; }; +/** + * struct w1_family - reference counted family structure. + * @family_entry: family linked list + * @fid: 8 bit family identifier + * @fops: operations for this family + * @refcnt: reference counter + */ struct w1_family { struct list_head family_entry; diff --git a/drivers/w1/w1_int.c b/drivers/w1/w1_int.c index 590bd8a7cd1b..9b084db739c7 100644 --- a/drivers/w1/w1_int.c +++ b/drivers/w1/w1_int.c @@ -75,8 +75,10 @@ static struct w1_master * w1_alloc_dev(u32 id, int slave_count, int slave_ttl, atomic_set(&dev->refcnt, 2); INIT_LIST_HEAD(&dev->slist); + INIT_LIST_HEAD(&dev->async_list); mutex_init(&dev->mutex); mutex_init(&dev->bus_mutex); + mutex_init(&dev->list_mutex); memcpy(&dev->dev, device, sizeof(struct device)); dev_set_name(&dev->dev, "w1_bus_master%u", dev->id); @@ -103,6 +105,10 @@ static void w1_free_dev(struct w1_master *dev) device_unregister(&dev->dev); } +/** + * w1_add_master_device() - registers a new master device + * @master: master bus device to register + */ int w1_add_master_device(struct w1_bus_master *master) { struct w1_master *dev, *entry; @@ -172,6 +178,7 @@ int w1_add_master_device(struct w1_bus_master *master) #if 0 /* Thread cleanup code, not required currently. */ err_out_kill_thread: + set_bit(W1_ABORT_SEARCH, &dev->flags); kthread_stop(dev->thread); #endif err_out_rm_attr: @@ -187,16 +194,22 @@ void __w1_remove_master_device(struct w1_master *dev) struct w1_netlink_msg msg; struct w1_slave *sl, *sln; - kthread_stop(dev->thread); - mutex_lock(&w1_mlock); list_del(&dev->w1_master_entry); mutex_unlock(&w1_mlock); + set_bit(W1_ABORT_SEARCH, &dev->flags); + kthread_stop(dev->thread); + mutex_lock(&dev->mutex); - list_for_each_entry_safe(sl, sln, &dev->slist, w1_slave_entry) + mutex_lock(&dev->list_mutex); + list_for_each_entry_safe(sl, sln, &dev->slist, w1_slave_entry) { + mutex_unlock(&dev->list_mutex); w1_slave_detach(sl); + mutex_lock(&dev->list_mutex); + } w1_destroy_master_attributes(dev); + mutex_unlock(&dev->list_mutex); mutex_unlock(&dev->mutex); atomic_dec(&dev->refcnt); @@ -206,7 +219,9 @@ void __w1_remove_master_device(struct w1_master *dev) if (msleep_interruptible(1000)) flush_signals(current); + w1_process_callbacks(dev); } + w1_process_callbacks(dev); memset(&msg, 0, sizeof(msg)); msg.id.mst.id = dev->id; @@ -216,6 +231,10 @@ void __w1_remove_master_device(struct w1_master *dev) w1_free_dev(dev); } +/** + * w1_remove_master_device() - unregister a master device + * @bm: master bus device to remove + */ void w1_remove_master_device(struct w1_bus_master *bm) { struct w1_master *dev, *found = NULL; diff --git a/drivers/w1/w1_io.c b/drivers/w1/w1_io.c index e10acc237733..282092421cc9 100644 --- a/drivers/w1/w1_io.c +++ b/drivers/w1/w1_io.c @@ -62,7 +62,9 @@ static void w1_write_bit(struct w1_master *dev, int bit); static u8 w1_read_bit(struct w1_master *dev); /** - * Generates a write-0 or write-1 cycle and samples the level. + * w1_touch_bit() - Generates a write-0 or write-1 cycle and samples the level. + * @dev: the master device + * @bit: 0 - write a 0, 1 - write a 0 read the level */ static u8 w1_touch_bit(struct w1_master *dev, int bit) { @@ -77,7 +79,10 @@ static u8 w1_touch_bit(struct w1_master *dev, int bit) } /** - * Generates a write-0 or write-1 cycle. + * w1_write_bit() - Generates a write-0 or write-1 cycle. + * @dev: the master device + * @bit: bit to write + * * Only call if dev->bus_master->touch_bit is NULL */ static void w1_write_bit(struct w1_master *dev, int bit) @@ -102,11 +107,12 @@ static void w1_write_bit(struct w1_master *dev, int bit) } /** + * w1_pre_write() - pre-write operations + * @dev: the master device + * * Pre-write operation, currently only supporting strong pullups. * Program the hardware for a strong pullup, if one has been requested and * the hardware supports it. - * - * @param dev the master device */ static void w1_pre_write(struct w1_master *dev) { @@ -118,11 +124,12 @@ static void w1_pre_write(struct w1_master *dev) } /** + * w1_post_write() - post-write options + * @dev: the master device + * * Post-write operation, currently only supporting strong pullups. * If a strong pullup was requested, clear it if the hardware supports * them, or execute the delay otherwise, in either case clear the request. - * - * @param dev the master device */ static void w1_post_write(struct w1_master *dev) { @@ -136,10 +143,9 @@ static void w1_post_write(struct w1_master *dev) } /** - * Writes 8 bits. - * - * @param dev the master device - * @param byte the byte to write + * w1_write_8() - Writes 8 bits. + * @dev: the master device + * @byte: the byte to write */ void w1_write_8(struct w1_master *dev, u8 byte) { @@ -161,7 +167,9 @@ EXPORT_SYMBOL_GPL(w1_write_8); /** - * Generates a write-1 cycle and samples the level. + * w1_read_bit() - Generates a write-1 cycle and samples the level. + * @dev: the master device + * * Only call if dev->bus_master->touch_bit is NULL */ static u8 w1_read_bit(struct w1_master *dev) @@ -185,16 +193,17 @@ static u8 w1_read_bit(struct w1_master *dev) } /** - * Does a triplet - used for searching ROM addresses. + * w1_triplet() - * Does a triplet - used for searching ROM addresses. + * @dev: the master device + * @bdir: the bit to write if both id_bit and comp_bit are 0 + * * Return bits: * bit 0 = id_bit * bit 1 = comp_bit * bit 2 = dir_taken * If both bits 0 & 1 are set, the search should be restarted. * - * @param dev the master device - * @param bdir the bit to write if both id_bit and comp_bit are 0 - * @return bit fields - see above + * Return: bit fields - see above */ u8 w1_triplet(struct w1_master *dev, int bdir) { @@ -226,10 +235,10 @@ u8 w1_triplet(struct w1_master *dev, int bdir) } /** - * Reads 8 bits. + * w1_read_8() - Reads 8 bits. + * @dev: the master device * - * @param dev the master device - * @return the byte read + * Return: the byte read */ u8 w1_read_8(struct w1_master *dev) { @@ -247,11 +256,10 @@ u8 w1_read_8(struct w1_master *dev) EXPORT_SYMBOL_GPL(w1_read_8); /** - * Writes a series of bytes. - * - * @param dev the master device - * @param buf pointer to the data to write - * @param len the number of bytes to write + * w1_write_block() - Writes a series of bytes. + * @dev: the master device + * @buf: pointer to the data to write + * @len: the number of bytes to write */ void w1_write_block(struct w1_master *dev, const u8 *buf, int len) { @@ -269,11 +277,10 @@ void w1_write_block(struct w1_master *dev, const u8 *buf, int len) EXPORT_SYMBOL_GPL(w1_write_block); /** - * Touches a series of bytes. - * - * @param dev the master device - * @param buf pointer to the data to write - * @param len the number of bytes to write + * w1_touch_block() - Touches a series of bytes. + * @dev: the master device + * @buf: pointer to the data to write + * @len: the number of bytes to write */ void w1_touch_block(struct w1_master *dev, u8 *buf, int len) { @@ -294,12 +301,11 @@ void w1_touch_block(struct w1_master *dev, u8 *buf, int len) EXPORT_SYMBOL_GPL(w1_touch_block); /** - * Reads a series of bytes. - * - * @param dev the master device - * @param buf pointer to the buffer to fill - * @param len the number of bytes to read - * @return the number of bytes read + * w1_read_block() - Reads a series of bytes. + * @dev: the master device + * @buf: pointer to the buffer to fill + * @len: the number of bytes to read + * Return: the number of bytes read */ u8 w1_read_block(struct w1_master *dev, u8 *buf, int len) { @@ -319,10 +325,9 @@ u8 w1_read_block(struct w1_master *dev, u8 *buf, int len) EXPORT_SYMBOL_GPL(w1_read_block); /** - * Issues a reset bus sequence. - * - * @param dev The bus master pointer - * @return 0=Device present, 1=No device present or error + * w1_reset_bus() - Issues a reset bus sequence. + * @dev: the master device + * Return: 0=Device present, 1=No device present or error */ int w1_reset_bus(struct w1_master *dev) { @@ -383,12 +388,15 @@ void w1_search_devices(struct w1_master *dev, u8 search_type, w1_slave_found_cal } /** + * w1_reset_select_slave() - reset and select a slave + * @sl: the slave to select + * * Resets the bus and then selects the slave by sending either a skip rom - * or a rom match. + * or a rom match. A skip rom is issued if there is only one device + * registered on the bus. * The w1 master lock must be held. * - * @param sl the slave to select - * @return 0=success, anything else=error + * Return: 0=success, anything else=error */ int w1_reset_select_slave(struct w1_slave *sl) { @@ -409,6 +417,9 @@ int w1_reset_select_slave(struct w1_slave *sl) EXPORT_SYMBOL_GPL(w1_reset_select_slave); /** + * w1_reset_resume_command() - resume instead of another match ROM + * @dev: the master device + * * When the workflow with a slave amongst many requires several * successive commands a reset between each, this function is similar * to doing a reset then a match ROM for the last matched ROM. The @@ -420,8 +431,6 @@ EXPORT_SYMBOL_GPL(w1_reset_select_slave); * doesn't work of course, but the resume command is the next best thing. * * The w1 master lock must be held. - * - * @param dev the master device */ int w1_reset_resume_command(struct w1_master *dev) { @@ -435,6 +444,10 @@ int w1_reset_resume_command(struct w1_master *dev) EXPORT_SYMBOL_GPL(w1_reset_resume_command); /** + * w1_next_pullup() - register for a strong pullup + * @dev: the master device + * @delay: time in milliseconds + * * Put out a strong pull-up of the specified duration after the next write * operation. Not all hardware supports strong pullups. Hardware that * doesn't support strong pullups will sleep for the given time after the @@ -442,8 +455,7 @@ EXPORT_SYMBOL_GPL(w1_reset_resume_command); * the next write, specifying zero will clear a previous request. * The w1 master lock must be held. * - * @param delay time in milliseconds - * @return 0=success, anything else=error + * Return: 0=success, anything else=error */ void w1_next_pullup(struct w1_master *dev, int delay) { diff --git a/drivers/w1/w1_netlink.c b/drivers/w1/w1_netlink.c index 40788c925d1c..5234964fe001 100644 --- a/drivers/w1/w1_netlink.c +++ b/drivers/w1/w1_netlink.c @@ -45,7 +45,7 @@ void w1_netlink_send(struct w1_master *dev, struct w1_netlink_msg *msg) memcpy(w, msg, sizeof(struct w1_netlink_msg)); - cn_netlink_send(m, 0, GFP_KERNEL); + cn_netlink_send(m, dev->portid, 0, GFP_KERNEL); } static void w1_send_slave(struct w1_master *dev, u64 rn) @@ -54,53 +54,95 @@ static void w1_send_slave(struct w1_master *dev, u64 rn) struct w1_netlink_msg *hdr = (struct w1_netlink_msg *)(msg + 1); struct w1_netlink_cmd *cmd = (struct w1_netlink_cmd *)(hdr + 1); int avail; - - /* update kernel slave list */ - w1_slave_found(dev, rn); + u64 *data; avail = dev->priv_size - cmd->len; - if (avail > 8) { - u64 *data = (void *)(cmd + 1) + cmd->len; + if (avail < 8) { + msg->ack++; + cn_netlink_send(msg, dev->portid, 0, GFP_KERNEL); - *data = rn; - cmd->len += 8; - hdr->len += 8; - msg->len += 8; - return; + msg->len = sizeof(struct w1_netlink_msg) + + sizeof(struct w1_netlink_cmd); + hdr->len = sizeof(struct w1_netlink_cmd); + cmd->len = 0; } - msg->ack++; - cn_netlink_send(msg, 0, GFP_KERNEL); + data = (void *)(cmd + 1) + cmd->len; - msg->len = sizeof(struct w1_netlink_msg) + sizeof(struct w1_netlink_cmd); - hdr->len = sizeof(struct w1_netlink_cmd); - cmd->len = 0; + *data = rn; + cmd->len += 8; + hdr->len += 8; + msg->len += 8; } -static int w1_process_search_command(struct w1_master *dev, struct cn_msg *msg, - unsigned int avail) +static void w1_found_send_slave(struct w1_master *dev, u64 rn) { - struct w1_netlink_msg *hdr = (struct w1_netlink_msg *)(msg + 1); - struct w1_netlink_cmd *cmd = (struct w1_netlink_cmd *)(hdr + 1); - int search_type = (cmd->cmd == W1_CMD_ALARM_SEARCH)?W1_ALARM_SEARCH:W1_SEARCH; + /* update kernel slave list */ + w1_slave_found(dev, rn); - dev->priv = msg; - dev->priv_size = avail; + w1_send_slave(dev, rn); +} + +/* Get the current slave list, or search (with or without alarm) */ +static int w1_get_slaves(struct w1_master *dev, + struct cn_msg *req_msg, struct w1_netlink_msg *req_hdr, + struct w1_netlink_cmd *req_cmd) +{ + struct cn_msg *msg; + struct w1_netlink_msg *hdr; + struct w1_netlink_cmd *cmd; + struct w1_slave *sl; + + msg = kzalloc(PAGE_SIZE, GFP_KERNEL); + if (!msg) + return -ENOMEM; + + msg->id = req_msg->id; + msg->seq = req_msg->seq; + msg->ack = 0; + msg->len = sizeof(struct w1_netlink_msg) + + sizeof(struct w1_netlink_cmd); + + hdr = (struct w1_netlink_msg *)(msg + 1); + cmd = (struct w1_netlink_cmd *)(hdr + 1); + + hdr->type = W1_MASTER_CMD; + hdr->id = req_hdr->id; + hdr->len = sizeof(struct w1_netlink_cmd); + + cmd->cmd = req_cmd->cmd; + cmd->len = 0; - w1_search_process_cb(dev, search_type, w1_send_slave); + dev->priv = msg; + dev->priv_size = PAGE_SIZE - msg->len - sizeof(struct cn_msg); + + if (req_cmd->cmd == W1_CMD_LIST_SLAVES) { + __u64 rn; + mutex_lock(&dev->list_mutex); + list_for_each_entry(sl, &dev->slist, w1_slave_entry) { + memcpy(&rn, &sl->reg_num, sizeof(rn)); + w1_send_slave(dev, rn); + } + mutex_unlock(&dev->list_mutex); + } else { + w1_search_process_cb(dev, cmd->cmd == W1_CMD_ALARM_SEARCH ? + W1_ALARM_SEARCH : W1_SEARCH, w1_found_send_slave); + } msg->ack = 0; - cn_netlink_send(msg, 0, GFP_KERNEL); + cn_netlink_send(msg, dev->portid, 0, GFP_KERNEL); dev->priv = NULL; dev->priv_size = 0; + kfree(msg); + return 0; } static int w1_send_read_reply(struct cn_msg *msg, struct w1_netlink_msg *hdr, - struct w1_netlink_cmd *cmd) + struct w1_netlink_cmd *cmd, u32 portid) { void *data; struct w1_netlink_msg *h; @@ -131,7 +173,7 @@ static int w1_send_read_reply(struct cn_msg *msg, struct w1_netlink_msg *hdr, memcpy(c->data, cmd->data, c->len); - err = cn_netlink_send(cm, 0, GFP_KERNEL); + err = cn_netlink_send(cm, portid, 0, GFP_KERNEL); kfree(data); @@ -146,11 +188,11 @@ static int w1_process_command_io(struct w1_master *dev, struct cn_msg *msg, switch (cmd->cmd) { case W1_CMD_TOUCH: w1_touch_block(dev, cmd->data, cmd->len); - w1_send_read_reply(msg, hdr, cmd); + w1_send_read_reply(msg, hdr, cmd, dev->portid); break; case W1_CMD_READ: w1_read_block(dev, cmd->data, cmd->len); - w1_send_read_reply(msg, hdr, cmd); + w1_send_read_reply(msg, hdr, cmd, dev->portid); break; case W1_CMD_WRITE: w1_write_block(dev, cmd->data, cmd->len); @@ -163,38 +205,57 @@ static int w1_process_command_io(struct w1_master *dev, struct cn_msg *msg, return err; } -static int w1_process_command_master(struct w1_master *dev, struct cn_msg *req_msg, - struct w1_netlink_msg *req_hdr, struct w1_netlink_cmd *req_cmd) +static int w1_process_command_addremove(struct w1_master *dev, + struct cn_msg *msg, struct w1_netlink_msg *hdr, + struct w1_netlink_cmd *cmd) { - int err = -EINVAL; - struct cn_msg *msg; - struct w1_netlink_msg *hdr; - struct w1_netlink_cmd *cmd; + struct w1_slave *sl; + int err = 0; + struct w1_reg_num *id; - msg = kzalloc(PAGE_SIZE, GFP_KERNEL); - if (!msg) - return -ENOMEM; + if (cmd->len != 8) + return -EINVAL; - msg->id = req_msg->id; - msg->seq = req_msg->seq; - msg->ack = 0; - msg->len = sizeof(struct w1_netlink_msg) + sizeof(struct w1_netlink_cmd); + id = (struct w1_reg_num *)cmd->data; - hdr = (struct w1_netlink_msg *)(msg + 1); - cmd = (struct w1_netlink_cmd *)(hdr + 1); + sl = w1_slave_search_device(dev, id); + switch (cmd->cmd) { + case W1_CMD_SLAVE_ADD: + if (sl) + err = -EINVAL; + else + err = w1_attach_slave_device(dev, id); + break; + case W1_CMD_SLAVE_REMOVE: + if (sl) + w1_slave_detach(sl); + else + err = -EINVAL; + break; + default: + err = -EINVAL; + break; + } - hdr->type = W1_MASTER_CMD; - hdr->id = req_hdr->id; - hdr->len = sizeof(struct w1_netlink_cmd); + return err; +} - cmd->cmd = req_cmd->cmd; - cmd->len = 0; +static int w1_process_command_master(struct w1_master *dev, + struct cn_msg *req_msg, struct w1_netlink_msg *req_hdr, + struct w1_netlink_cmd *req_cmd) +{ + int err = -EINVAL; - switch (cmd->cmd) { + /* drop bus_mutex for search (does it's own locking), and add/remove + * which doesn't use the bus + */ + switch (req_cmd->cmd) { case W1_CMD_SEARCH: case W1_CMD_ALARM_SEARCH: - err = w1_process_search_command(dev, msg, - PAGE_SIZE - msg->len - sizeof(struct cn_msg)); + case W1_CMD_LIST_SLAVES: + mutex_unlock(&dev->bus_mutex); + err = w1_get_slaves(dev, req_msg, req_hdr, req_cmd); + mutex_lock(&dev->bus_mutex); break; case W1_CMD_READ: case W1_CMD_WRITE: @@ -204,12 +265,20 @@ static int w1_process_command_master(struct w1_master *dev, struct cn_msg *req_m case W1_CMD_RESET: err = w1_reset_bus(dev); break; + case W1_CMD_SLAVE_ADD: + case W1_CMD_SLAVE_REMOVE: + mutex_unlock(&dev->bus_mutex); + mutex_lock(&dev->mutex); + err = w1_process_command_addremove(dev, req_msg, req_hdr, + req_cmd); + mutex_unlock(&dev->mutex); + mutex_lock(&dev->bus_mutex); + break; default: err = -EINVAL; break; } - kfree(msg); return err; } @@ -223,7 +292,8 @@ static int w1_process_command_slave(struct w1_slave *sl, struct cn_msg *msg, return w1_process_command_io(sl->master, msg, hdr, cmd); } -static int w1_process_command_root(struct cn_msg *msg, struct w1_netlink_msg *mcmd) +static int w1_process_command_root(struct cn_msg *msg, + struct w1_netlink_msg *mcmd, u32 portid) { struct w1_master *m; struct cn_msg *cn; @@ -256,7 +326,7 @@ static int w1_process_command_root(struct cn_msg *msg, struct w1_netlink_msg *mc mutex_lock(&w1_mlock); list_for_each_entry(m, &w1_masters, w1_master_entry) { if (cn->len + sizeof(*id) > PAGE_SIZE - sizeof(struct cn_msg)) { - cn_netlink_send(cn, 0, GFP_KERNEL); + cn_netlink_send(cn, portid, 0, GFP_KERNEL); cn->ack++; cn->len = sizeof(struct w1_netlink_msg); w->len = 0; @@ -269,7 +339,7 @@ static int w1_process_command_root(struct cn_msg *msg, struct w1_netlink_msg *mc id++; } cn->ack = 0; - cn_netlink_send(cn, 0, GFP_KERNEL); + cn_netlink_send(cn, portid, 0, GFP_KERNEL); mutex_unlock(&w1_mlock); kfree(cn); @@ -277,7 +347,7 @@ static int w1_process_command_root(struct cn_msg *msg, struct w1_netlink_msg *mc } static int w1_netlink_send_error(struct cn_msg *rcmsg, struct w1_netlink_msg *rmsg, - struct w1_netlink_cmd *rcmd, int error) + struct w1_netlink_cmd *rcmd, int portid, int error) { struct cn_msg *cmsg; struct w1_netlink_msg *msg; @@ -304,35 +374,147 @@ static int w1_netlink_send_error(struct cn_msg *rcmsg, struct w1_netlink_msg *rm cmsg->len += sizeof(*cmd); } - error = cn_netlink_send(cmsg, 0, GFP_KERNEL); + error = cn_netlink_send(cmsg, portid, 0, GFP_KERNEL); kfree(cmsg); return error; } +/* Bundle together a reference count, the full message, and broken out + * commands to be executed on each w1 master kthread in one memory allocation. + */ +struct w1_cb_block { + atomic_t refcnt; + u32 portid; /* Sending process port ID */ + struct cn_msg msg; + /* cn_msg data */ + /* one or more variable length struct w1_cb_node */ +}; +struct w1_cb_node { + struct w1_async_cmd async; + /* pointers within w1_cb_block and msg data */ + struct w1_cb_block *block; + struct w1_netlink_msg *m; + struct w1_slave *sl; + struct w1_master *dev; +}; + +static void w1_process_cb(struct w1_master *dev, struct w1_async_cmd *async_cmd) +{ + struct w1_cb_node *node = container_of(async_cmd, struct w1_cb_node, + async); + u16 mlen = node->m->len; + u8 *cmd_data = node->m->data; + int err = 0; + struct w1_slave *sl = node->sl; + struct w1_netlink_cmd *cmd = NULL; + + mutex_lock(&dev->bus_mutex); + dev->portid = node->block->portid; + if (sl && w1_reset_select_slave(sl)) + err = -ENODEV; + + while (mlen && !err) { + cmd = (struct w1_netlink_cmd *)cmd_data; + + if (cmd->len + sizeof(struct w1_netlink_cmd) > mlen) { + err = -E2BIG; + break; + } + + if (sl) + err = w1_process_command_slave(sl, &node->block->msg, + node->m, cmd); + else + err = w1_process_command_master(dev, &node->block->msg, + node->m, cmd); + + w1_netlink_send_error(&node->block->msg, node->m, cmd, + node->block->portid, err); + err = 0; + + cmd_data += cmd->len + sizeof(struct w1_netlink_cmd); + mlen -= cmd->len + sizeof(struct w1_netlink_cmd); + } + + if (!cmd || err) + w1_netlink_send_error(&node->block->msg, node->m, cmd, + node->block->portid, err); + + if (sl) + w1_unref_slave(sl); + else + atomic_dec(&dev->refcnt); + dev->portid = 0; + mutex_unlock(&dev->bus_mutex); + + mutex_lock(&dev->list_mutex); + list_del(&async_cmd->async_entry); + mutex_unlock(&dev->list_mutex); + + if (atomic_sub_return(1, &node->block->refcnt) == 0) + kfree(node->block); +} + static void w1_cn_callback(struct cn_msg *msg, struct netlink_skb_parms *nsp) { struct w1_netlink_msg *m = (struct w1_netlink_msg *)(msg + 1); - struct w1_netlink_cmd *cmd; struct w1_slave *sl; struct w1_master *dev; + u16 msg_len; int err = 0; + struct w1_cb_block *block = NULL; + struct w1_cb_node *node = NULL; + int node_count = 0; + + /* Count the number of master or slave commands there are to allocate + * space for one cb_node each. + */ + msg_len = msg->len; + while (msg_len && !err) { + if (m->len + sizeof(struct w1_netlink_msg) > msg_len) { + err = -E2BIG; + break; + } + + if (m->type == W1_MASTER_CMD || m->type == W1_SLAVE_CMD) + ++node_count; - while (msg->len && !err) { + msg_len -= sizeof(struct w1_netlink_msg) + m->len; + m = (struct w1_netlink_msg *)(((u8 *)m) + + sizeof(struct w1_netlink_msg) + m->len); + } + m = (struct w1_netlink_msg *)(msg + 1); + if (node_count) { + /* msg->len doesn't include itself */ + long size = sizeof(struct w1_cb_block) + msg->len + + node_count*sizeof(struct w1_cb_node); + block = kmalloc(size, GFP_KERNEL); + if (!block) { + w1_netlink_send_error(msg, m, NULL, nsp->portid, + -ENOMEM); + return; + } + atomic_set(&block->refcnt, 1); + block->portid = nsp->portid; + memcpy(&block->msg, msg, sizeof(*msg) + msg->len); + node = (struct w1_cb_node *)((u8 *)block->msg.data + msg->len); + } + + msg_len = msg->len; + while (msg_len && !err) { struct w1_reg_num id; u16 mlen = m->len; - u8 *cmd_data = m->data; dev = NULL; sl = NULL; - cmd = NULL; memcpy(&id, m->id.id, sizeof(id)); #if 0 printk("%s: %02x.%012llx.%02x: type=%02x, len=%u.\n", __func__, id.family, (unsigned long long)id.id, id.crc, m->type, m->len); #endif - if (m->len + sizeof(struct w1_netlink_msg) > msg->len) { + if (m->len + sizeof(struct w1_netlink_msg) > msg_len) { err = -E2BIG; break; } @@ -344,7 +526,7 @@ static void w1_cn_callback(struct cn_msg *msg, struct netlink_skb_parms *nsp) if (sl) dev = sl->master; } else { - err = w1_process_command_root(msg, m); + err = w1_process_command_root(msg, m, nsp->portid); goto out_cont; } @@ -357,41 +539,24 @@ static void w1_cn_callback(struct cn_msg *msg, struct netlink_skb_parms *nsp) if (!mlen) goto out_cont; - mutex_lock(&dev->mutex); - - if (sl && w1_reset_select_slave(sl)) { - err = -ENODEV; - goto out_up; - } + atomic_inc(&block->refcnt); + node->async.cb = w1_process_cb; + node->block = block; + node->m = (struct w1_netlink_msg *)((u8 *)&block->msg + + (size_t)((u8 *)m - (u8 *)msg)); + node->sl = sl; + node->dev = dev; - while (mlen) { - cmd = (struct w1_netlink_cmd *)cmd_data; + mutex_lock(&dev->list_mutex); + list_add_tail(&node->async.async_entry, &dev->async_list); + wake_up_process(dev->thread); + mutex_unlock(&dev->list_mutex); + ++node; - if (cmd->len + sizeof(struct w1_netlink_cmd) > mlen) { - err = -E2BIG; - break; - } - - if (sl) - err = w1_process_command_slave(sl, msg, m, cmd); - else - err = w1_process_command_master(dev, msg, m, cmd); - - w1_netlink_send_error(msg, m, cmd, err); - err = 0; - - cmd_data += cmd->len + sizeof(struct w1_netlink_cmd); - mlen -= cmd->len + sizeof(struct w1_netlink_cmd); - } -out_up: - atomic_dec(&dev->refcnt); - if (sl) - atomic_dec(&sl->refcnt); - mutex_unlock(&dev->mutex); out_cont: - if (!cmd || err) - w1_netlink_send_error(msg, m, cmd, err); - msg->len -= sizeof(struct w1_netlink_msg) + m->len; + if (err) + w1_netlink_send_error(msg, m, NULL, nsp->portid, err); + msg_len -= sizeof(struct w1_netlink_msg) + m->len; m = (struct w1_netlink_msg *)(((u8 *)m) + sizeof(struct w1_netlink_msg) + m->len); /* @@ -400,6 +565,8 @@ out_cont: if (err == -ENODEV) err = 0; } + if (block && atomic_sub_return(1, &block->refcnt) == 0) + kfree(block); } int w1_init_netlink(void) diff --git a/drivers/w1/w1_netlink.h b/drivers/w1/w1_netlink.h index b0922dc29658..1e9504e67650 100644 --- a/drivers/w1/w1_netlink.h +++ b/drivers/w1/w1_netlink.h @@ -27,6 +27,18 @@ #include "w1.h" +/** + * enum w1_netlink_message_types - message type + * + * @W1_SLAVE_ADD: notification that a slave device was added + * @W1_SLAVE_REMOVE: notification that a slave device was removed + * @W1_MASTER_ADD: notification that a new bus master was added + * @W1_MASTER_REMOVE: notification that a bus masterwas removed + * @W1_MASTER_CMD: initiate operations on a specific master + * @W1_SLAVE_CMD: sends reset, selects the slave, then does a read/write/touch + * operation + * @W1_LIST_MASTERS: used to determine the bus master identifiers + */ enum w1_netlink_message_types { W1_SLAVE_ADD = 0, W1_SLAVE_REMOVE, @@ -52,6 +64,22 @@ struct w1_netlink_msg __u8 data[0]; }; +/** + * enum w1_commands - commands available for master or slave operations + * @W1_CMD_READ: read len bytes + * @W1_CMD_WRITE: write len bytes + * @W1_CMD_SEARCH: initiate a standard search, returns only the slave + * devices found during that search + * @W1_CMD_ALARM_SEARCH: search for devices that are currently alarming + * @W1_CMD_TOUCH: Touches a series of bytes. + * @W1_CMD_RESET: sends a bus reset on the given master + * @W1_CMD_SLAVE_ADD: adds a slave to the given master, + * 8 byte slave id at data[0] + * @W1_CMD_SLAVE_REMOVE: removes a slave to the given master, + * 8 byte slave id at data[0] + * @W1_CMD_LIST_SLAVES: list of slaves registered on this master + * @W1_CMD_MAX: number of available commands + */ enum w1_commands { W1_CMD_READ = 0, W1_CMD_WRITE, @@ -59,7 +87,10 @@ enum w1_commands { W1_CMD_ALARM_SEARCH, W1_CMD_TOUCH, W1_CMD_RESET, - W1_CMD_MAX, + W1_CMD_SLAVE_ADD, + W1_CMD_SLAVE_REMOVE, + W1_CMD_LIST_SLAVES, + W1_CMD_MAX }; struct w1_netlink_cmd |