diff options
Diffstat (limited to 'drivers/block')
| -rw-r--r-- | drivers/block/Makefile | 1 | ||||
| -rw-r--r-- | drivers/block/aoe/aoe.h | 1 | ||||
| -rw-r--r-- | drivers/block/aoe/aoedev.c | 2 | ||||
| -rw-r--r-- | drivers/block/aoe/aoenet.c | 2 | ||||
| -rw-r--r-- | drivers/block/ataflop.c | 4 | ||||
| -rw-r--r-- | drivers/block/cciss.c | 217 | ||||
| -rw-r--r-- | drivers/block/floppy.c | 79 | ||||
| -rw-r--r-- | drivers/block/loop.c | 3 | ||||
| -rw-r--r-- | drivers/block/nbd.c | 9 | ||||
| -rw-r--r-- | drivers/block/paride/pg.c | 2 | ||||
| -rw-r--r-- | drivers/block/ps3vram.c | 865 | ||||
| -rw-r--r-- | drivers/block/xen-blkfront.c | 32 | ||||
| -rw-r--r-- | drivers/block/xsysace.c | 22 |
13 files changed, 1191 insertions, 48 deletions
diff --git a/drivers/block/Makefile b/drivers/block/Makefile index 204332b29578..87e120e0a79c 100644 --- a/drivers/block/Makefile +++ b/drivers/block/Makefile @@ -9,6 +9,7 @@ obj-$(CONFIG_MAC_FLOPPY) += swim3.o obj-$(CONFIG_BLK_DEV_FD) += floppy.o obj-$(CONFIG_AMIGA_FLOPPY) += amiflop.o obj-$(CONFIG_PS3_DISK) += ps3disk.o +obj-$(CONFIG_PS3_VRAM) += ps3vram.o obj-$(CONFIG_ATARI_FLOPPY) += ataflop.o obj-$(CONFIG_AMIGA_Z2RAM) += z2ram.o obj-$(CONFIG_BLK_DEV_RAM) += brd.o diff --git a/drivers/block/aoe/aoe.h b/drivers/block/aoe/aoe.h index c237527b1aa5..5e41e6dd657b 100644 --- a/drivers/block/aoe/aoe.h +++ b/drivers/block/aoe/aoe.h @@ -18,6 +18,7 @@ enum { AOECMD_ATA, AOECMD_CFG, + AOECMD_VEND_MIN = 0xf0, AOEFL_RSP = (1<<3), AOEFL_ERR = (1<<2), diff --git a/drivers/block/aoe/aoedev.c b/drivers/block/aoe/aoedev.c index cc250577d405..eeea477d9601 100644 --- a/drivers/block/aoe/aoedev.c +++ b/drivers/block/aoe/aoedev.c @@ -173,7 +173,7 @@ skbfree(struct sk_buff *skb) return; while (atomic_read(&skb_shinfo(skb)->dataref) != 1 && i-- > 0) msleep(Sms); - if (i <= 0) { + if (i < 0) { printk(KERN_ERR "aoe: %s holds ref: %s\n", skb->dev ? skb->dev->name : "netif", diff --git a/drivers/block/aoe/aoenet.c b/drivers/block/aoe/aoenet.c index 30de5b1c647e..c6099ba9a4b8 100644 --- a/drivers/block/aoe/aoenet.c +++ b/drivers/block/aoe/aoenet.c @@ -142,6 +142,8 @@ aoenet_rcv(struct sk_buff *skb, struct net_device *ifp, struct packet_type *pt, aoecmd_cfg_rsp(skb); break; default: + if (h->cmd >= AOECMD_VEND_MIN) + break; /* don't complain about vendor commands */ printk(KERN_INFO "aoe: unknown cmd %d\n", h->cmd); } exit: diff --git a/drivers/block/ataflop.c b/drivers/block/ataflop.c index 69e1df7dfa14..4234c11c1e4c 100644 --- a/drivers/block/ataflop.c +++ b/drivers/block/ataflop.c @@ -1730,7 +1730,7 @@ static int __init fd_test_drive_present( int drive ) timeout = jiffies + 2*HZ+HZ/2; while (time_before(jiffies, timeout)) - if (!(mfp.par_dt_reg & 0x20)) + if (!(st_mfp.par_dt_reg & 0x20)) break; status = FDC_READ( FDCREG_STATUS ); @@ -1747,7 +1747,7 @@ static int __init fd_test_drive_present( int drive ) /* dummy seek command to make WP bit accessible */ FDC_WRITE( FDCREG_DATA, 0 ); FDC_WRITE( FDCREG_CMD, FDCCMD_SEEK ); - while( mfp.par_dt_reg & 0x20 ) + while( st_mfp.par_dt_reg & 0x20 ) ; status = FDC_READ( FDCREG_STATUS ); } diff --git a/drivers/block/cciss.c b/drivers/block/cciss.c index 01e69383d9c0..4f9b6d792017 100644 --- a/drivers/block/cciss.c +++ b/drivers/block/cciss.c @@ -3390,6 +3390,203 @@ static void free_hba(int i) kfree(p); } +/* Send a message CDB to the firmware. */ +static __devinit int cciss_message(struct pci_dev *pdev, unsigned char opcode, unsigned char type) +{ + typedef struct { + CommandListHeader_struct CommandHeader; + RequestBlock_struct Request; + ErrDescriptor_struct ErrorDescriptor; + } Command; + static const size_t cmd_sz = sizeof(Command) + sizeof(ErrorInfo_struct); + Command *cmd; + dma_addr_t paddr64; + uint32_t paddr32, tag; + void __iomem *vaddr; + int i, err; + + vaddr = ioremap_nocache(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0)); + if (vaddr == NULL) + return -ENOMEM; + + /* The Inbound Post Queue only accepts 32-bit physical addresses for the + CCISS commands, so they must be allocated from the lower 4GiB of + memory. */ + err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK); + if (err) { + iounmap(vaddr); + return -ENOMEM; + } + + cmd = pci_alloc_consistent(pdev, cmd_sz, &paddr64); + if (cmd == NULL) { + iounmap(vaddr); + return -ENOMEM; + } + + /* This must fit, because of the 32-bit consistent DMA mask. Also, + although there's no guarantee, we assume that the address is at + least 4-byte aligned (most likely, it's page-aligned). */ + paddr32 = paddr64; + + cmd->CommandHeader.ReplyQueue = 0; + cmd->CommandHeader.SGList = 0; + cmd->CommandHeader.SGTotal = 0; + cmd->CommandHeader.Tag.lower = paddr32; + cmd->CommandHeader.Tag.upper = 0; + memset(&cmd->CommandHeader.LUN.LunAddrBytes, 0, 8); + + cmd->Request.CDBLen = 16; + cmd->Request.Type.Type = TYPE_MSG; + cmd->Request.Type.Attribute = ATTR_HEADOFQUEUE; + cmd->Request.Type.Direction = XFER_NONE; + cmd->Request.Timeout = 0; /* Don't time out */ + cmd->Request.CDB[0] = opcode; + cmd->Request.CDB[1] = type; + memset(&cmd->Request.CDB[2], 0, 14); /* the rest of the CDB is reserved */ + + cmd->ErrorDescriptor.Addr.lower = paddr32 + sizeof(Command); + cmd->ErrorDescriptor.Addr.upper = 0; + cmd->ErrorDescriptor.Len = sizeof(ErrorInfo_struct); + + writel(paddr32, vaddr + SA5_REQUEST_PORT_OFFSET); + + for (i = 0; i < 10; i++) { + tag = readl(vaddr + SA5_REPLY_PORT_OFFSET); + if ((tag & ~3) == paddr32) + break; + schedule_timeout_uninterruptible(HZ); + } + + iounmap(vaddr); + + /* we leak the DMA buffer here ... no choice since the controller could + still complete the command. */ + if (i == 10) { + printk(KERN_ERR "cciss: controller message %02x:%02x timed out\n", + opcode, type); + return -ETIMEDOUT; + } + + pci_free_consistent(pdev, cmd_sz, cmd, paddr64); + + if (tag & 2) { + printk(KERN_ERR "cciss: controller message %02x:%02x failed\n", + opcode, type); + return -EIO; + } + + printk(KERN_INFO "cciss: controller message %02x:%02x succeeded\n", + opcode, type); + return 0; +} + +#define cciss_soft_reset_controller(p) cciss_message(p, 1, 0) +#define cciss_noop(p) cciss_message(p, 3, 0) + +static __devinit int cciss_reset_msi(struct pci_dev *pdev) +{ +/* the #defines are stolen from drivers/pci/msi.h. */ +#define msi_control_reg(base) (base + PCI_MSI_FLAGS) +#define PCI_MSIX_FLAGS_ENABLE (1 << 15) + + int pos; + u16 control = 0; + + pos = pci_find_capability(pdev, PCI_CAP_ID_MSI); + if (pos) { + pci_read_config_word(pdev, msi_control_reg(pos), &control); + if (control & PCI_MSI_FLAGS_ENABLE) { + printk(KERN_INFO "cciss: resetting MSI\n"); + pci_write_config_word(pdev, msi_control_reg(pos), control & ~PCI_MSI_FLAGS_ENABLE); + } + } + + pos = pci_find_capability(pdev, PCI_CAP_ID_MSIX); + if (pos) { + pci_read_config_word(pdev, msi_control_reg(pos), &control); + if (control & PCI_MSIX_FLAGS_ENABLE) { + printk(KERN_INFO "cciss: resetting MSI-X\n"); + pci_write_config_word(pdev, msi_control_reg(pos), control & ~PCI_MSIX_FLAGS_ENABLE); + } + } + + return 0; +} + +/* This does a hard reset of the controller using PCI power management + * states. */ +static __devinit int cciss_hard_reset_controller(struct pci_dev *pdev) +{ + u16 pmcsr, saved_config_space[32]; + int i, pos; + + printk(KERN_INFO "cciss: using PCI PM to reset controller\n"); + + /* This is very nearly the same thing as + + pci_save_state(pci_dev); + pci_set_power_state(pci_dev, PCI_D3hot); + pci_set_power_state(pci_dev, PCI_D0); + pci_restore_state(pci_dev); + + but we can't use these nice canned kernel routines on + kexec, because they also check the MSI/MSI-X state in PCI + configuration space and do the wrong thing when it is + set/cleared. Also, the pci_save/restore_state functions + violate the ordering requirements for restoring the + configuration space from the CCISS document (see the + comment below). So we roll our own .... */ + + for (i = 0; i < 32; i++) + pci_read_config_word(pdev, 2*i, &saved_config_space[i]); + + pos = pci_find_capability(pdev, PCI_CAP_ID_PM); + if (pos == 0) { + printk(KERN_ERR "cciss_reset_controller: PCI PM not supported\n"); + return -ENODEV; + } + + /* Quoting from the Open CISS Specification: "The Power + * Management Control/Status Register (CSR) controls the power + * state of the device. The normal operating state is D0, + * CSR=00h. The software off state is D3, CSR=03h. To reset + * the controller, place the interface device in D3 then to + * D0, this causes a secondary PCI reset which will reset the + * controller." */ + + /* enter the D3hot power management state */ + pci_read_config_word(pdev, pos + PCI_PM_CTRL, &pmcsr); + pmcsr &= ~PCI_PM_CTRL_STATE_MASK; + pmcsr |= PCI_D3hot; + pci_write_config_word(pdev, pos + PCI_PM_CTRL, pmcsr); + + schedule_timeout_uninterruptible(HZ >> 1); + + /* enter the D0 power management state */ + pmcsr &= ~PCI_PM_CTRL_STATE_MASK; + pmcsr |= PCI_D0; + pci_write_config_word(pdev, pos + PCI_PM_CTRL, pmcsr); + + schedule_timeout_uninterruptible(HZ >> 1); + + /* Restore the PCI configuration space. The Open CISS + * Specification says, "Restore the PCI Configuration + * Registers, offsets 00h through 60h. It is important to + * restore the command register, 16-bits at offset 04h, + * last. Do not restore the configuration status register, + * 16-bits at offset 06h." Note that the offset is 2*i. */ + for (i = 0; i < 32; i++) { + if (i == 2 || i == 3) + continue; + pci_write_config_word(pdev, 2*i, saved_config_space[i]); + } + wmb(); + pci_write_config_word(pdev, 4, saved_config_space[2]); + + return 0; +} + /* * This is it. Find all the controllers and register them. I really hate * stealing all these major device numbers. @@ -3404,6 +3601,26 @@ static int __devinit cciss_init_one(struct pci_dev *pdev, int dac, return_code; InquiryData_struct *inq_buff = NULL; + if (reset_devices) { + /* Reset the controller with a PCI power-cycle */ + if (cciss_hard_reset_controller(pdev) || cciss_reset_msi(pdev)) + return -ENODEV; + + /* Now try to get the controller to respond to a no-op. Some + devices (notably the HP Smart Array 5i Controller) need + up to 30 seconds to respond. */ + for (i=0; i<30; i++) { + if (cciss_noop(pdev) == 0) + break; + + schedule_timeout_uninterruptible(HZ); + } + if (i == 30) { + printk(KERN_ERR "cciss: controller seems dead\n"); + return -EBUSY; + } + } + i = alloc_cciss_hba(); if (i < 0) return -1; diff --git a/drivers/block/floppy.c b/drivers/block/floppy.c index cf29cc4e6ab7..83d8ed39433d 100644 --- a/drivers/block/floppy.c +++ b/drivers/block/floppy.c @@ -558,6 +558,8 @@ static void process_fd_request(void); static void recalibrate_floppy(void); static void floppy_shutdown(unsigned long); +static int floppy_request_regions(int); +static void floppy_release_regions(int); static int floppy_grab_irq_and_dma(void); static void floppy_release_irq_and_dma(void); @@ -4274,8 +4276,7 @@ static int __init floppy_init(void) FDCS->rawcmd = 2; if (user_reset_fdc(-1, FD_RESET_ALWAYS, 0)) { /* free ioports reserved by floppy_grab_irq_and_dma() */ - release_region(FDCS->address + 2, 4); - release_region(FDCS->address + 7, 1); + floppy_release_regions(fdc); FDCS->address = -1; FDCS->version = FDC_NONE; continue; @@ -4284,8 +4285,7 @@ static int __init floppy_init(void) FDCS->version = get_fdc_version(); if (FDCS->version == FDC_NONE) { /* free ioports reserved by floppy_grab_irq_and_dma() */ - release_region(FDCS->address + 2, 4); - release_region(FDCS->address + 7, 1); + floppy_release_regions(fdc); FDCS->address = -1; continue; } @@ -4358,6 +4358,47 @@ out_put_disk: static DEFINE_SPINLOCK(floppy_usage_lock); +static const struct io_region { + int offset; + int size; +} io_regions[] = { + { 2, 1 }, + /* address + 3 is sometimes reserved by pnp bios for motherboard */ + { 4, 2 }, + /* address + 6 is reserved, and may be taken by IDE. + * Unfortunately, Adaptec doesn't know this :-(, */ + { 7, 1 }, +}; + +static void floppy_release_allocated_regions(int fdc, const struct io_region *p) +{ + while (p != io_regions) { + p--; + release_region(FDCS->address + p->offset, p->size); + } +} + +#define ARRAY_END(X) (&((X)[ARRAY_SIZE(X)])) + +static int floppy_request_regions(int fdc) +{ + const struct io_region *p; + + for (p = io_regions; p < ARRAY_END(io_regions); p++) { + if (!request_region(FDCS->address + p->offset, p->size, "floppy")) { + DPRINT("Floppy io-port 0x%04lx in use\n", FDCS->address + p->offset); + floppy_release_allocated_regions(fdc, p); + return -EBUSY; + } + } + return 0; +} + +static void floppy_release_regions(int fdc) +{ + floppy_release_allocated_regions(fdc, ARRAY_END(io_regions)); +} + static int floppy_grab_irq_and_dma(void) { unsigned long flags; @@ -4399,18 +4440,8 @@ static int floppy_grab_irq_and_dma(void) for (fdc = 0; fdc < N_FDC; fdc++) { if (FDCS->address != -1) { - if (!request_region(FDCS->address + 2, 4, "floppy")) { - DPRINT("Floppy io-port 0x%04lx in use\n", - FDCS->address + 2); - goto cleanup1; - } - if (!request_region(FDCS->address + 7, 1, "floppy DIR")) { - DPRINT("Floppy io-port 0x%04lx in use\n", - FDCS->address + 7); - goto cleanup2; - } - /* address + 6 is reserved, and may be taken by IDE. - * Unfortunately, Adaptec doesn't know this :-(, */ + if (floppy_request_regions(fdc)) + goto cleanup; } } for (fdc = 0; fdc < N_FDC; fdc++) { @@ -4432,15 +4463,11 @@ static int floppy_grab_irq_and_dma(void) fdc = 0; irqdma_allocated = 1; return 0; -cleanup2: - release_region(FDCS->address + 2, 4); -cleanup1: +cleanup: fd_free_irq(); fd_free_dma(); - while (--fdc >= 0) { - release_region(FDCS->address + 2, 4); - release_region(FDCS->address + 7, 1); - } + while (--fdc >= 0) + floppy_release_regions(fdc); spin_lock_irqsave(&floppy_usage_lock, flags); usage_count--; spin_unlock_irqrestore(&floppy_usage_lock, flags); @@ -4501,10 +4528,8 @@ static void floppy_release_irq_and_dma(void) #endif old_fdc = fdc; for (fdc = 0; fdc < N_FDC; fdc++) - if (FDCS->address != -1) { - release_region(FDCS->address + 2, 4); - release_region(FDCS->address + 7, 1); - } + if (FDCS->address != -1) + floppy_release_regions(fdc); fdc = old_fdc; } diff --git a/drivers/block/loop.c b/drivers/block/loop.c index edbaac6c0573..bf0345577672 100644 --- a/drivers/block/loop.c +++ b/drivers/block/loop.c @@ -392,8 +392,7 @@ lo_splice_actor(struct pipe_inode_info *pipe, struct pipe_buffer *buf, struct loop_device *lo = p->lo; struct page *page = buf->page; sector_t IV; - size_t size; - int ret; + int size, ret; ret = buf->ops->confirm(pipe, buf); if (unlikely(ret)) diff --git a/drivers/block/nbd.c b/drivers/block/nbd.c index 34f80fa6fed1..8299e2d3b611 100644 --- a/drivers/block/nbd.c +++ b/drivers/block/nbd.c @@ -549,6 +549,15 @@ static void do_nbd_request(struct request_queue * q) BUG_ON(lo->magic != LO_MAGIC); + if (unlikely(!lo->sock)) { + printk(KERN_ERR "%s: Attempted send on closed socket\n", + lo->disk->disk_name); + req->errors++; + nbd_end_request(req); + spin_lock_irq(q->queue_lock); + continue; + } + spin_lock_irq(&lo->queue_lock); list_add_tail(&req->queuelist, &lo->waiting_queue); spin_unlock_irq(&lo->queue_lock); diff --git a/drivers/block/paride/pg.c b/drivers/block/paride/pg.c index 9dfa27163001..c397b3ddba9b 100644 --- a/drivers/block/paride/pg.c +++ b/drivers/block/paride/pg.c @@ -422,7 +422,7 @@ static void xs(char *buf, char *targ, int len) for (k = 0; k < len; k++) { char c = *buf++; - if (c != ' ' || c != l) + if (c != ' ' && c != l) l = *targ++ = c; } if (l == ' ') diff --git a/drivers/block/ps3vram.c b/drivers/block/ps3vram.c new file mode 100644 index 000000000000..393ed6760d78 --- /dev/null +++ b/drivers/block/ps3vram.c @@ -0,0 +1,865 @@ +/* + * ps3vram - Use extra PS3 video ram as MTD block device. + * + * Copyright 2009 Sony Corporation + * + * Based on the MTD ps3vram driver, which is + * Copyright (c) 2007-2008 Jim Paris <jim@jtan.com> + * Added support RSX DMA Vivien Chappelier <vivien.chappelier@free.fr> + */ + +#include <linux/blkdev.h> +#include <linux/delay.h> +#include <linux/proc_fs.h> +#include <linux/seq_file.h> + +#include <asm/firmware.h> +#include <asm/lv1call.h> +#include <asm/ps3.h> + + +#define DEVICE_NAME "ps3vram" + + +#define XDR_BUF_SIZE (2 * 1024 * 1024) /* XDR buffer (must be 1MiB aligned) */ +#define XDR_IOIF 0x0c000000 + +#define FIFO_BASE XDR_IOIF +#define FIFO_SIZE (64 * 1024) + +#define DMA_PAGE_SIZE (4 * 1024) + +#define CACHE_PAGE_SIZE (256 * 1024) +#define CACHE_PAGE_COUNT ((XDR_BUF_SIZE - FIFO_SIZE) / CACHE_PAGE_SIZE) + +#define CACHE_OFFSET CACHE_PAGE_SIZE +#define FIFO_OFFSET 0 + +#define CTRL_PUT 0x10 +#define CTRL_GET 0x11 +#define CTRL_TOP 0x15 + +#define UPLOAD_SUBCH 1 +#define DOWNLOAD_SUBCH 2 + +#define NV_MEMORY_TO_MEMORY_FORMAT_OFFSET_IN 0x0000030c +#define NV_MEMORY_TO_MEMORY_FORMAT_NOTIFY 0x00000104 + +#define L1GPU_CONTEXT_ATTRIBUTE_FB_BLIT 0x601 + +#define CACHE_PAGE_PRESENT 1 +#define CACHE_PAGE_DIRTY 2 + +struct ps3vram_tag { + unsigned int address; + unsigned int flags; +}; + +struct ps3vram_cache { + unsigned int page_count; + unsigned int page_size; + struct ps3vram_tag *tags; + unsigned int hit; + unsigned int miss; +}; + +struct ps3vram_priv { + struct request_queue *queue; + struct gendisk *gendisk; + + u64 size; + + u64 memory_handle; + u64 context_handle; + u32 *ctrl; + u32 *reports; + u8 __iomem *ddr_base; + u8 *xdr_buf; + + u32 *fifo_base; + u32 *fifo_ptr; + + struct ps3vram_cache cache; + + /* Used to serialize cache/DMA operations */ + struct mutex lock; +}; + + +static int ps3vram_major; + + +static struct block_device_operations ps3vram_fops = { + .owner = THIS_MODULE, +}; + + +#define DMA_NOTIFIER_HANDLE_BASE 0x66604200 /* first DMA notifier handle */ +#define DMA_NOTIFIER_OFFSET_BASE 0x1000 /* first DMA notifier offset */ +#define DMA_NOTIFIER_SIZE 0x40 +#define NOTIFIER 7 /* notifier used for completion report */ + +static char *size = "256M"; +module_param(size, charp, 0); +MODULE_PARM_DESC(size, "memory size"); + +static u32 *ps3vram_get_notifier(u32 *reports, int notifier) +{ + return (void *)reports + DMA_NOTIFIER_OFFSET_BASE + + DMA_NOTIFIER_SIZE * notifier; +} + +static void ps3vram_notifier_reset(struct ps3_system_bus_device *dev) +{ + struct ps3vram_priv *priv = dev->core.driver_data; + u32 *notify = ps3vram_get_notifier(priv->reports, NOTIFIER); + int i; + + for (i = 0; i < 4; i++) + notify[i] = 0xffffffff; +} + +static int ps3vram_notifier_wait(struct ps3_system_bus_device *dev, + unsigned int timeout_ms) +{ + struct ps3vram_priv *priv = dev->core.driver_data; + u32 *notify = ps3vram_get_notifier(priv->reports, NOTIFIER); + unsigned long timeout = jiffies + msecs_to_jiffies(timeout_ms); + + do { + if (!notify[3]) + return 0; + msleep(1); + } while (time_before(jiffies, timeout)); + + return -ETIMEDOUT; +} + +static void ps3vram_init_ring(struct ps3_system_bus_device *dev) +{ + struct ps3vram_priv *priv = dev->core.driver_data; + + priv->ctrl[CTRL_PUT] = FIFO_BASE + FIFO_OFFSET; + priv->ctrl[CTRL_GET] = FIFO_BASE + FIFO_OFFSET; +} + +static int ps3vram_wait_ring(struct ps3_system_bus_device *dev, + unsigned int timeout_ms) +{ + struct ps3vram_priv *priv = dev->core.driver_data; + unsigned long timeout = jiffies + msecs_to_jiffies(timeout_ms); + + do { + if (priv->ctrl[CTRL_PUT] == priv->ctrl[CTRL_GET]) + return 0; + msleep(1); + } while (time_before(jiffies, timeout)); + + dev_warn(&dev->core, "FIFO timeout (%08x/%08x/%08x)\n", + priv->ctrl[CTRL_PUT], priv->ctrl[CTRL_GET], + priv->ctrl[CTRL_TOP]); + + return -ETIMEDOUT; +} + +static void ps3vram_out_ring(struct ps3vram_priv *priv, u32 data) +{ + *(priv->fifo_ptr)++ = data; +} + +static void ps3vram_begin_ring(struct ps3vram_priv *priv, u32 chan, u32 tag, + u32 size) +{ + ps3vram_out_ring(priv, (size << 18) | (chan << 13) | tag); +} + +static void ps3vram_rewind_ring(struct ps3_system_bus_device *dev) +{ + struct ps3vram_priv *priv = dev->core.driver_data; + int status; + + ps3vram_out_ring(priv, 0x20000000 | (FIFO_BASE + FIFO_OFFSET)); + + priv->ctrl[CTRL_PUT] = FIFO_BASE + FIFO_OFFSET; + + /* asking the HV for a blit will kick the FIFO */ + status = lv1_gpu_context_attribute(priv->context_handle, + L1GPU_CONTEXT_ATTRIBUTE_FB_BLIT, 0, + 0, 0, 0); + if (status) + dev_err(&dev->core, + "%s: lv1_gpu_context_attribute failed %d\n", __func__, + status); + + priv->fifo_ptr = priv->fifo_base; +} + +static void ps3vram_fire_ring(struct ps3_system_bus_device *dev) +{ + struct ps3vram_priv *priv = dev->core.driver_data; + int status; + + mutex_lock(&ps3_gpu_mutex); + + priv->ctrl[CTRL_PUT] = FIFO_BASE + FIFO_OFFSET + + (priv->fifo_ptr - priv->fifo_base) * sizeof(u32); + + /* asking the HV for a blit will kick the FIFO */ + status = lv1_gpu_context_attribute(priv->context_handle, + L1GPU_CONTEXT_ATTRIBUTE_FB_BLIT, 0, + 0, 0, 0); + if (status) + dev_err(&dev->core, + "%s: lv1_gpu_context_attribute failed %d\n", __func__, + status); + + if ((priv->fifo_ptr - priv->fifo_base) * sizeof(u32) > + FIFO_SIZE - 1024) { + dev_dbg(&dev->core, "FIFO full, rewinding\n"); + ps3vram_wait_ring(dev, 200); + ps3vram_rewind_ring(dev); + } + + mutex_unlock(&ps3_gpu_mutex); +} + +static void ps3vram_bind(struct ps3_system_bus_device *dev) +{ + struct ps3vram_priv *priv = dev->core.driver_data; + + ps3vram_begin_ring(priv, UPLOAD_SUBCH, 0, 1); + ps3vram_out_ring(priv, 0x31337303); + ps3vram_begin_ring(priv, UPLOAD_SUBCH, 0x180, 3); + ps3vram_out_ring(priv, DMA_NOTIFIER_HANDLE_BASE + NOTIFIER); + ps3vram_out_ring(priv, 0xfeed0001); /* DMA system RAM instance */ + ps3vram_out_ring(priv, 0xfeed0000); /* DMA video RAM instance */ + + ps3vram_begin_ring(priv, DOWNLOAD_SUBCH, 0, 1); + ps3vram_out_ring(priv, 0x3137c0de); + ps3vram_begin_ring(priv, DOWNLOAD_SUBCH, 0x180, 3); + ps3vram_out_ring(priv, DMA_NOTIFIER_HANDLE_BASE + NOTIFIER); + ps3vram_out_ring(priv, 0xfeed0000); /* DMA video RAM instance */ + ps3vram_out_ring(priv, 0xfeed0001); /* DMA system RAM instance */ + + ps3vram_fire_ring(dev); +} + +static int ps3vram_upload(struct ps3_system_bus_device *dev, + unsigned int src_offset, unsigned int dst_offset, + int len, int count) +{ + struct ps3vram_priv *priv = dev->core.driver_data; + + ps3vram_begin_ring(priv, UPLOAD_SUBCH, + NV_MEMORY_TO_MEMORY_FORMAT_OFFSET_IN, 8); + ps3vram_out_ring(priv, XDR_IOIF + src_offset); + ps3vram_out_ring(priv, dst_offset); + ps3vram_out_ring(priv, len); + ps3vram_out_ring(priv, len); + ps3vram_out_ring(priv, len); + ps3vram_out_ring(priv, count); + ps3vram_out_ring(priv, (1 << 8) | 1); + ps3vram_out_ring(priv, 0); + + ps3vram_notifier_reset(dev); + ps3vram_begin_ring(priv, UPLOAD_SUBCH, + NV_MEMORY_TO_MEMORY_FORMAT_NOTIFY, 1); + ps3vram_out_ring(priv, 0); + ps3vram_begin_ring(priv, UPLOAD_SUBCH, 0x100, 1); + ps3vram_out_ring(priv, 0); + ps3vram_fire_ring(dev); + if (ps3vram_notifier_wait(dev, 200) < 0) { + dev_warn(&dev->core, "%s: Notifier timeout\n", __func__); + return -1; + } + + return 0; +} + +static int ps3vram_download(struct ps3_system_bus_device *dev, + unsigned int src_offset, unsigned int dst_offset, + int len, int count) +{ + struct ps3vram_priv *priv = dev->core.driver_data; + + ps3vram_begin_ring(priv, DOWNLOAD_SUBCH, + NV_MEMORY_TO_MEMORY_FORMAT_OFFSET_IN, 8); + ps3vram_out_ring(priv, src_offset); + ps3vram_out_ring(priv, XDR_IOIF + dst_offset); + ps3vram_out_ring(priv, len); + ps3vram_out_ring(priv, len); + ps3vram_out_ring(priv, len); + ps3vram_out_ring(priv, count); + ps3vram_out_ring(priv, (1 << 8) | 1); + ps3vram_out_ring(priv, 0); + + ps3vram_notifier_reset(dev); + ps3vram_begin_ring(priv, DOWNLOAD_SUBCH, + NV_MEMORY_TO_MEMORY_FORMAT_NOTIFY, 1); + ps3vram_out_ring(priv, 0); + ps3vram_begin_ring(priv, DOWNLOAD_SUBCH, 0x100, 1); + ps3vram_out_ring(priv, 0); + ps3vram_fire_ring(dev); + if (ps3vram_notifier_wait(dev, 200) < 0) { + dev_warn(&dev->core, "%s: Notifier timeout\n", __func__); + return -1; + } + + return 0; +} + +static void ps3vram_cache_evict(struct ps3_system_bus_device *dev, int entry) +{ + struct ps3vram_priv *priv = dev->core.driver_data; + struct ps3vram_cache *cache = &priv->cache; + + if (!(cache->tags[entry].flags & CACHE_PAGE_DIRTY)) + return; + + dev_dbg(&dev->core, "Flushing %d: 0x%08x\n", entry, + cache->tags[entry].address); + if (ps3vram_upload(dev, CACHE_OFFSET + entry * cache->page_size, + cache->tags[entry].address, DMA_PAGE_SIZE, + cache->page_size / DMA_PAGE_SIZE) < 0) { + dev_err(&dev->core, + "Failed to upload from 0x%x to " "0x%x size 0x%x\n", + entry * cache->page_size, cache->tags[entry].address, + cache->page_size); + } + cache->tags[entry].flags &= ~CACHE_PAGE_DIRTY; +} + +static void ps3vram_cache_load(struct ps3_system_bus_device *dev, int entry, + unsigned int address) +{ + struct ps3vram_priv *priv = dev->core.driver_data; + struct ps3vram_cache *cache = &priv->cache; + + dev_dbg(&dev->core, "Fetching %d: 0x%08x\n", entry, address); + if (ps3vram_download(dev, address, + CACHE_OFFSET + entry * cache->page_size, + DMA_PAGE_SIZE, + cache->page_size / DMA_PAGE_SIZE) < 0) { + dev_err(&dev->core, + "Failed to download from 0x%x to 0x%x size 0x%x\n", + address, entry * cache->page_size, cache->page_size); + } + + cache->tags[entry].address = address; + cache->tags[entry].flags |= CACHE_PAGE_PRESENT; +} + + +static void ps3vram_cache_flush(struct ps3_system_bus_device *dev) +{ + struct ps3vram_priv *priv = dev->core.driver_data; + struct ps3vram_cache *cache = &priv->cache; + int i; + + dev_dbg(&dev->core, "FLUSH\n"); + for (i = 0; i < cache->page_count; i++) { + ps3vram_cache_evict(dev, i); + cache->tags[i].flags = 0; + } +} + +static unsigned int ps3vram_cache_match(struct ps3_system_bus_device *dev, + loff_t address) +{ + struct ps3vram_priv *priv = dev->core.driver_data; + struct ps3vram_cache *cache = &priv->cache; + unsigned int base; + unsigned int offset; + int i; + static int counter; + + offset = (unsigned int) (address & (cache->page_size - 1)); + base = (unsigned int) (address - offset); + + /* fully associative check */ + for (i = 0; i < cache->page_count; i++) { + if ((cache->tags[i].flags & CACHE_PAGE_PRESENT) && + cache->tags[i].address == base) { + cache->hit++; + dev_dbg(&dev->core, "Found entry %d: 0x%08x\n", i, + cache->tags[i].address); + return i; + } + } + + /* choose a random entry */ + i = (jiffies + (counter++)) % cache->page_count; + dev_dbg(&dev->core, "Using entry %d\n", i); + + ps3vram_cache_evict(dev, i); + ps3vram_cache_load(dev, i, base); + + cache->miss++; + return i; +} + +static int ps3vram_cache_init(struct ps3_system_bus_device *dev) +{ + struct ps3vram_priv *priv = dev->core.driver_data; + + priv->cache.page_count = CACHE_PAGE_COUNT; + priv->cache.page_size = CACHE_PAGE_SIZE; + priv->cache.tags = kzalloc(sizeof(struct ps3vram_tag) * + CACHE_PAGE_COUNT, GFP_KERNEL); + if (priv->cache.tags == NULL) { + dev_err(&dev->core, "Could not allocate cache tags\n"); + return -ENOMEM; + } + + dev_info(&dev->core, "Created ram cache: %d entries, %d KiB each\n", + CACHE_PAGE_COUNT, CACHE_PAGE_SIZE / 1024); + + return 0; +} + +static void ps3vram_cache_cleanup(struct ps3_system_bus_device *dev) +{ + struct ps3vram_priv *priv = dev->core.driver_data; + + ps3vram_cache_flush(dev); + kfree(priv->cache.tags); +} + +static int ps3vram_read(struct ps3_system_bus_device *dev, loff_t from, + size_t len, size_t *retlen, u_char *buf) +{ + struct ps3vram_priv *priv = dev->core.driver_data; + unsigned int cached, count; + + dev_dbg(&dev->core, "%s: from=0x%08x len=0x%zx\n", __func__, + (unsigned int)from, len); + + if (from >= priv->size) + return -EIO; + + if (len > priv->size - from) + len = priv->size - from; + + /* Copy from vram to buf */ + count = len; + while (count) { + unsigned int offset, avail; + unsigned int entry; + + offset = (unsigned int) (from & (priv->cache.page_size - 1)); + avail = priv->cache.page_size - offset; + + mutex_lock(&priv->lock); + + entry = ps3vram_cache_match(dev, from); + cached = CACHE_OFFSET + entry * priv->cache.page_size + offset; + + dev_dbg(&dev->core, "%s: from=%08x cached=%08x offset=%08x " + "avail=%08x count=%08x\n", __func__, + (unsigned int)from, cached, offset, avail, count); + + if (avail > count) + avail = count; + memcpy(buf, priv->xdr_buf + cached, avail); + + mutex_unlock(&priv->lock); + + buf += avail; + count -= avail; + from += avail; + } + + *retlen = len; + return 0; +} + +static int ps3vram_write(struct ps3_system_bus_device *dev, loff_t to, + size_t len, size_t *retlen, const u_char *buf) +{ + struct ps3vram_priv *priv = dev->core.driver_data; + unsigned int cached, count; + + if (to >= priv->size) + return -EIO; + + if (len > priv->size - to) + len = priv->size - to; + + /* Copy from buf to vram */ + count = len; + while (count) { + unsigned int offset, avail; + unsigned int entry; + + offset = (unsigned int) (to & (priv->cache.page_size - 1)); + avail = priv->cache.page_size - offset; + + mutex_lock(&priv->lock); + + entry = ps3vram_cache_match(dev, to); + cached = CACHE_OFFSET + entry * priv->cache.page_size + offset; + + dev_dbg(&dev->core, "%s: to=%08x cached=%08x offset=%08x " + "avail=%08x count=%08x\n", __func__, (unsigned int)to, + cached, offset, avail, count); + + if (avail > count) + avail = count; + memcpy(priv->xdr_buf + cached, buf, avail); + + priv->cache.tags[entry].flags |= CACHE_PAGE_DIRTY; + + mutex_unlock(&priv->lock); + + buf += avail; + count -= avail; + to += avail; + } + + *retlen = len; + return 0; +} + +static int ps3vram_proc_show(struct seq_file *m, void *v) +{ + struct ps3vram_priv *priv = m->private; + + seq_printf(m, "hit:%u\nmiss:%u\n", priv->cache.hit, priv->cache.miss); + return 0; +} + +static int ps3vram_proc_open(struct inode *inode, struct file *file) +{ + return single_open(file, ps3vram_proc_show, PDE(inode)->data); +} + +static const struct file_operations ps3vram_proc_fops = { + .owner = THIS_MODULE, + .open = ps3vram_proc_open, + .read = seq_read, + .llseek = seq_lseek, + .release = single_release, +}; + +static void __devinit ps3vram_proc_init(struct ps3_system_bus_device *dev) +{ + struct ps3vram_priv *priv = dev->core.driver_data; + struct proc_dir_entry *pde; + + pde = proc_create(DEVICE_NAME, 0444, NULL, &ps3vram_proc_fops); + if (!pde) { + dev_warn(&dev->core, "failed to create /proc entry\n"); + return; + } + + pde->owner = THIS_MODULE; + pde->data = priv; +} + +static int ps3vram_make_request(struct request_queue *q, struct bio *bio) +{ + struct ps3_system_bus_device *dev = q->queuedata; + int write = bio_data_dir(bio) == WRITE; + const char *op = write ? "write" : "read"; + loff_t offset = bio->bi_sector << 9; + int error = 0; + struct bio_vec *bvec; + unsigned int i; + + dev_dbg(&dev->core, "%s\n", __func__); + + bio_for_each_segment(bvec, bio, i) { + /* PS3 is ppc64, so we don't handle highmem */ + char *ptr = page_address(bvec->bv_page) + bvec->bv_offset; + size_t len = bvec->bv_len, retlen; + + dev_dbg(&dev->core, " %s %zu bytes at offset %llu\n", op, + len, offset); + if (write) + error = ps3vram_write(dev, offset, len, &retlen, ptr); + else + error = ps3vram_read(dev, offset, len, &retlen, ptr); + + if (error) { + dev_err(&dev->core, "%s failed\n", op); + goto out; + } + + if (retlen != len) { + dev_err(&dev->core, "Short %s\n", op); + goto out; + } + + offset += len; + } + + dev_dbg(&dev->core, "%s completed\n", op); + +out: + bio_endio(bio, error); + return 0; +} + +static int __devinit ps3vram_probe(struct ps3_system_bus_device *dev) +{ + struct ps3vram_priv *priv; + int error, status; + struct request_queue *queue; + struct gendisk *gendisk; + u64 ddr_lpar, ctrl_lpar, info_lpar, reports_lpar, ddr_size, + reports_size; + char *rest; + + priv = kzalloc(sizeof(*priv), GFP_KERNEL); + if (!priv) { + error = -ENOMEM; + goto fail; + } + + mutex_init(&priv->lock); + dev->core.driver_data = priv; + + priv = dev->core.driver_data; + + /* Allocate XDR buffer (1MiB aligned) */ + priv->xdr_buf = (void *)__get_free_pages(GFP_KERNEL, + get_order(XDR_BUF_SIZE)); + if (priv->xdr_buf == NULL) { + dev_err(&dev->core, "Could not allocate XDR buffer\n"); + error = -ENOMEM; + goto fail_free_priv; + } + + /* Put FIFO at begginning of XDR buffer */ + priv->fifo_base = (u32 *) (priv->xdr_buf + FIFO_OFFSET); + priv->fifo_ptr = priv->fifo_base; + + /* XXX: Need to open GPU, in case ps3fb or snd_ps3 aren't loaded */ + if (ps3_open_hv_device(dev)) { + dev_err(&dev->core, "ps3_open_hv_device failed\n"); + error = -EAGAIN; + goto out_close_gpu; + } + + /* Request memory */ + status = -1; + ddr_size = ALIGN(memparse(size, &rest), 1024*1024); + if (!ddr_size) { + dev_err(&dev->core, "Specified size is too small\n"); + error = -EINVAL; + goto out_close_gpu; + } + + while (ddr_size > 0) { + status = lv1_gpu_memory_allocate(ddr_size, 0, 0, 0, 0, + &priv->memory_handle, + &ddr_lpar); + if (!status) + break; + ddr_size -= 1024*1024; + } + if (status) { + dev_err(&dev->core, "lv1_gpu_memory_allocate failed %d\n", + status); + error = -ENOMEM; + goto out_free_xdr_buf; + } + + /* Request context */ + status = lv1_gpu_context_allocate(priv->memory_handle, 0, + &priv->context_handle, &ctrl_lpar, + &info_lpar, &reports_lpar, + &reports_size); + if (status) { + dev_err(&dev->core, "lv1_gpu_context_allocate failed %d\n", + status); + error = -ENOMEM; + goto out_free_memory; + } + + /* Map XDR buffer to RSX */ + status = lv1_gpu_context_iomap(priv->context_handle, XDR_IOIF, + ps3_mm_phys_to_lpar(__pa(priv->xdr_buf)), + XDR_BUF_SIZE, 0); + if (status) { + dev_err(&dev->core, "lv1_gpu_context_iomap failed %d\n", + status); + error = -ENOMEM; + goto out_free_context; + } + + priv->ddr_base = ioremap_flags(ddr_lpar, ddr_size, _PAGE_NO_CACHE); + + if (!priv->ddr_base) { + dev_err(&dev->core, "ioremap DDR failed\n"); + error = -ENOMEM; + goto out_free_context; + } + + priv->ctrl = ioremap(ctrl_lpar, 64 * 1024); + if (!priv->ctrl) { + dev_err(&dev->core, "ioremap CTRL failed\n"); + error = -ENOMEM; + goto out_unmap_vram; + } + + priv->reports = ioremap(reports_lpar, reports_size); + if (!priv->reports) { + dev_err(&dev->core, "ioremap REPORTS failed\n"); + error = -ENOMEM; + goto out_unmap_ctrl; + } + + mutex_lock(&ps3_gpu_mutex); + ps3vram_init_ring(dev); + mutex_unlock(&ps3_gpu_mutex); + + priv->size = ddr_size; + + ps3vram_bind(dev); + + mutex_lock(&ps3_gpu_mutex); + error = ps3vram_wait_ring(dev, 100); + mutex_unlock(&ps3_gpu_mutex); + if (error < 0) { + dev_err(&dev->core, "Failed to initialize channels\n"); + error = -ETIMEDOUT; + goto out_unmap_reports; + } + + ps3vram_cache_init(dev); + ps3vram_proc_init(dev); + + queue = blk_alloc_queue(GFP_KERNEL); + if (!queue) { + dev_err(&dev->core, "blk_alloc_queue failed\n"); + error = -ENOMEM; + goto out_cache_cleanup; + } + + priv->queue = queue; + queue->queuedata = dev; + blk_queue_make_request(queue, ps3vram_make_request); + blk_queue_max_phys_segments(queue, MAX_PHYS_SEGMENTS); + blk_queue_max_hw_segments(queue, MAX_HW_SEGMENTS); + blk_queue_max_segment_size(queue, MAX_SEGMENT_SIZE); + blk_queue_max_sectors(queue, SAFE_MAX_SECTORS); + + gendisk = alloc_disk(1); + if (!gendisk) { + dev_err(&dev->core, "alloc_disk failed\n"); + error = -ENOMEM; + goto fail_cleanup_queue; + } + + priv->gendisk = gendisk; + gendisk->major = ps3vram_major; + gendisk->first_minor = 0; + gendisk->fops = &ps3vram_fops; + gendisk->queue = queue; + gendisk->private_data = dev; + gendisk->driverfs_dev = &dev->core; + strlcpy(gendisk->disk_name, DEVICE_NAME, sizeof(gendisk->disk_name)); + set_capacity(gendisk, priv->size >> 9); + + dev_info(&dev->core, "%s: Using %lu MiB of GPU memory\n", + gendisk->disk_name, get_capacity(gendisk) >> 11); + + add_disk(gendisk); + return 0; + +fail_cleanup_queue: + blk_cleanup_queue(queue); +out_cache_cleanup: + remove_proc_entry(DEVICE_NAME, NULL); + ps3vram_cache_cleanup(dev); +out_unmap_reports: + iounmap(priv->reports); +out_unmap_ctrl: + iounmap(priv->ctrl); +out_unmap_vram: + iounmap(priv->ddr_base); +out_free_context: + lv1_gpu_context_free(priv->context_handle); +out_free_memory: + lv1_gpu_memory_free(priv->memory_handle); +out_close_gpu: + ps3_close_hv_device(dev); +out_free_xdr_buf: + free_pages((unsigned long) priv->xdr_buf, get_order(XDR_BUF_SIZE)); +fail_free_priv: + kfree(priv); + dev->core.driver_data = NULL; +fail: + return error; +} + +static int ps3vram_remove(struct ps3_system_bus_device *dev) +{ + struct ps3vram_priv *priv = dev->core.driver_data; + + del_gendisk(priv->gendisk); + put_disk(priv->gendisk); + blk_cleanup_queue(priv->queue); + remove_proc_entry(DEVICE_NAME, NULL); + ps3vram_cache_cleanup(dev); + iounmap(priv->reports); + iounmap(priv->ctrl); + iounmap(priv->ddr_base); + lv1_gpu_context_free(priv->context_handle); + lv1_gpu_memory_free(priv->memory_handle); + ps3_close_hv_device(dev); + free_pages((unsigned long) priv->xdr_buf, get_order(XDR_BUF_SIZE)); + kfree(priv); + dev->core.driver_data = NULL; + return 0; +} + +static struct ps3_system_bus_driver ps3vram = { + .match_id = PS3_MATCH_ID_GPU, + .match_sub_id = PS3_MATCH_SUB_ID_GPU_RAMDISK, + .core.name = DEVICE_NAME, + .core.owner = THIS_MODULE, + .probe = ps3vram_probe, + .remove = ps3vram_remove, + .shutdown = ps3vram_remove, +}; + + +static int __init ps3vram_init(void) +{ + int error; + + if (!firmware_has_feature(FW_FEATURE_PS3_LV1)) + return -ENODEV; + + error = register_blkdev(0, DEVICE_NAME); + if (error <= 0) { + pr_err("%s: register_blkdev failed %d\n", DEVICE_NAME, error); + return error; + } + ps3vram_major = error; + + pr_info("%s: registered block device major %d\n", DEVICE_NAME, + ps3vram_major); + + error = ps3_system_bus_driver_register(&ps3vram); + if (error) + unregister_blkdev(ps3vram_major, DEVICE_NAME); + + return error; +} + +static void __exit ps3vram_exit(void) +{ + ps3_system_bus_driver_unregister(&ps3vram); + unregister_blkdev(ps3vram_major, DEVICE_NAME); +} + +module_init(ps3vram_init); +module_exit(ps3vram_exit); + +MODULE_LICENSE("GPL"); +MODULE_DESCRIPTION("PS3 Video RAM Storage Driver"); +MODULE_AUTHOR("Sony Corporation"); +MODULE_ALIAS(PS3_MODULE_ALIAS_GPU_RAMDISK); diff --git a/drivers/block/xen-blkfront.c b/drivers/block/xen-blkfront.c index 918ef725de41..8f905089b72b 100644 --- a/drivers/block/xen-blkfront.c +++ b/drivers/block/xen-blkfront.c @@ -40,6 +40,7 @@ #include <linux/hdreg.h> #include <linux/cdrom.h> #include <linux/module.h> +#include <linux/scatterlist.h> #include <xen/xenbus.h> #include <xen/grant_table.h> @@ -82,6 +83,7 @@ struct blkfront_info enum blkif_state connected; int ring_ref; struct blkif_front_ring ring; + struct scatterlist sg[BLKIF_MAX_SEGMENTS_PER_REQUEST]; unsigned int evtchn, irq; struct request_queue *rq; struct work_struct work; @@ -204,12 +206,11 @@ static int blkif_queue_request(struct request *req) struct blkfront_info *info = req->rq_disk->private_data; unsigned long buffer_mfn; struct blkif_request *ring_req; - struct req_iterator iter; - struct bio_vec *bvec; unsigned long id; unsigned int fsect, lsect; - int ref; + int i, ref; grant_ref_t gref_head; + struct scatterlist *sg; if (unlikely(info->connected != BLKIF_STATE_CONNECTED)) return 1; @@ -238,12 +239,13 @@ static int blkif_queue_request(struct request *req) if (blk_barrier_rq(req)) ring_req->operation = BLKIF_OP_WRITE_BARRIER; - ring_req->nr_segments = 0; - rq_for_each_segment(bvec, req, iter) { - BUG_ON(ring_req->nr_segments == BLKIF_MAX_SEGMENTS_PER_REQUEST); - buffer_mfn = pfn_to_mfn(page_to_pfn(bvec->bv_page)); - fsect = bvec->bv_offset >> 9; - lsect = fsect + (bvec->bv_len >> 9) - 1; + ring_req->nr_segments = blk_rq_map_sg(req->q, req, info->sg); + BUG_ON(ring_req->nr_segments > BLKIF_MAX_SEGMENTS_PER_REQUEST); + + for_each_sg(info->sg, sg, ring_req->nr_segments, i) { + buffer_mfn = pfn_to_mfn(page_to_pfn(sg_page(sg))); + fsect = sg->offset >> 9; + lsect = fsect + (sg->length >> 9) - 1; /* install a grant reference. */ ref = gnttab_claim_grant_reference(&gref_head); BUG_ON(ref == -ENOSPC); @@ -254,16 +256,12 @@ static int blkif_queue_request(struct request *req) buffer_mfn, rq_data_dir(req) ); - info->shadow[id].frame[ring_req->nr_segments] = - mfn_to_pfn(buffer_mfn); - - ring_req->seg[ring_req->nr_segments] = + info->shadow[id].frame[i] = mfn_to_pfn(buffer_mfn); + ring_req->seg[i] = (struct blkif_request_segment) { .gref = ref, .first_sect = fsect, .last_sect = lsect }; - - ring_req->nr_segments++; } info->ring.req_prod_pvt++; @@ -622,6 +620,8 @@ static int setup_blkring(struct xenbus_device *dev, SHARED_RING_INIT(sring); FRONT_RING_INIT(&info->ring, sring, PAGE_SIZE); + sg_init_table(info->sg, BLKIF_MAX_SEGMENTS_PER_REQUEST); + err = xenbus_grant_ring(dev, virt_to_mfn(info->ring.sring)); if (err < 0) { free_page((unsigned long)sring); @@ -977,6 +977,8 @@ static void backend_changed(struct xenbus_device *dev, break; case XenbusStateClosing: + if (info->gd == NULL) + xenbus_dev_fatal(dev, -ENODEV, "gd is NULL"); bd = bdget_disk(info->gd, 0); if (bd == NULL) xenbus_dev_fatal(dev, -ENODEV, "bdget failed"); diff --git a/drivers/block/xsysace.c b/drivers/block/xsysace.c index 381d686fc1a3..119be3442f28 100644 --- a/drivers/block/xsysace.c +++ b/drivers/block/xsysace.c @@ -489,6 +489,28 @@ static void ace_fsm_dostate(struct ace_device *ace) ace->fsm_state, ace->id_req_count); #endif + /* Verify that there is actually a CF in the slot. If not, then + * bail out back to the idle state and wake up all the waiters */ + status = ace_in32(ace, ACE_STATUS); + if ((status & ACE_STATUS_CFDETECT) == 0) { + ace->fsm_state = ACE_FSM_STATE_IDLE; + ace->media_change = 1; + set_capacity(ace->gd, 0); + dev_info(ace->dev, "No CF in slot\n"); + + /* Drop all pending requests */ + while ((req = elv_next_request(ace->queue)) != NULL) + end_request(req, 0); + + /* Drop back to IDLE state and notify waiters */ + ace->fsm_state = ACE_FSM_STATE_IDLE; + ace->id_result = -EIO; + while (ace->id_req_count) { + complete(&ace->id_completion); + ace->id_req_count--; + } + } + switch (ace->fsm_state) { case ACE_FSM_STATE_IDLE: /* See if there is anything to do */ |