diff options
Diffstat (limited to 'drivers/char')
| -rw-r--r-- | drivers/char/Kconfig | 42 | ||||
| -rw-r--r-- | drivers/char/Makefile | 2 | ||||
| -rw-r--r-- | drivers/char/agp/intel-gtt.c | 8 | ||||
| -rw-r--r-- | drivers/char/genrtc.c | 539 | ||||
| -rw-r--r-- | drivers/char/powernv-op-panel.c | 223 | ||||
| -rw-r--r-- | drivers/char/random.c | 5 |
6 files changed, 249 insertions, 570 deletions
diff --git a/drivers/char/Kconfig b/drivers/char/Kconfig index 601f64fcc890..dcc09739a54e 100644 --- a/drivers/char/Kconfig +++ b/drivers/char/Kconfig @@ -178,6 +178,20 @@ config IBM_BSR of threads across a large system which avoids bouncing a cacheline between several cores on a system +config POWERNV_OP_PANEL + tristate "IBM POWERNV Operator Panel Display support" + depends on PPC_POWERNV + default m + help + If you say Y here, a special character device node, /dev/op_panel, + will be created which exposes the operator panel display on IBM + Power Systems machines with FSPs. + + If you don't require access to the operator panel display from user + space, say N. + + If unsure, say M here to build it as a module called powernv-op-panel. + source "drivers/char/ipmi/Kconfig" config DS1620 @@ -279,7 +293,7 @@ if RTC_LIB=n config RTC tristate "Enhanced Real Time Clock Support (legacy PC RTC driver)" - depends on ALPHA || (MIPS && MACH_LOONGSON64) || MN10300 + depends on ALPHA || (MIPS && MACH_LOONGSON64) ---help--- If you say Y here and create a character special file /dev/rtc with major number 10 and minor number 135 using mknod ("man mknod"), you @@ -325,32 +339,6 @@ config JS_RTC To compile this driver as a module, choose M here: the module will be called js-rtc. -config GEN_RTC - tristate "Generic /dev/rtc emulation" - depends on RTC!=y - depends on ALPHA || M68K || MN10300 || PARISC || PPC || X86 - ---help--- - If you say Y here and create a character special file /dev/rtc with - major number 10 and minor number 135 using mknod ("man mknod"), you - will get access to the real time clock (or hardware clock) built - into your computer. - - It reports status information via the file /proc/driver/rtc and its - behaviour is set by various ioctls on /dev/rtc. If you enable the - "extended RTC operation" below it will also provide an emulation - for RTC_UIE which is required by some programs and may improve - precision in some cases. - - To compile this driver as a module, choose M here: the - module will be called genrtc. - -config GEN_RTC_X - bool "Extended RTC operation" - depends on GEN_RTC - help - Provides an emulation for RTC_UIE which is required by some programs - and may improve precision of the generic RTC support in some cases. - config EFI_RTC bool "EFI Real Time Clock Services" depends on IA64 diff --git a/drivers/char/Makefile b/drivers/char/Makefile index d8a7579300d2..6e6c244a66a0 100644 --- a/drivers/char/Makefile +++ b/drivers/char/Makefile @@ -25,7 +25,6 @@ obj-$(CONFIG_APPLICOM) += applicom.o obj-$(CONFIG_SONYPI) += sonypi.o obj-$(CONFIG_RTC) += rtc.o obj-$(CONFIG_HPET) += hpet.o -obj-$(CONFIG_GEN_RTC) += genrtc.o obj-$(CONFIG_EFI_RTC) += efirtc.o obj-$(CONFIG_DS1302) += ds1302.o obj-$(CONFIG_XILINX_HWICAP) += xilinx_hwicap/ @@ -60,3 +59,4 @@ js-rtc-y = rtc.o obj-$(CONFIG_TILE_SROM) += tile-srom.o obj-$(CONFIG_XILLYBUS) += xillybus/ +obj-$(CONFIG_POWERNV_OP_PANEL) += powernv-op-panel.o diff --git a/drivers/char/agp/intel-gtt.c b/drivers/char/agp/intel-gtt.c index aef87fdbd187..44311296ec02 100644 --- a/drivers/char/agp/intel-gtt.c +++ b/drivers/char/agp/intel-gtt.c @@ -840,6 +840,14 @@ static bool i830_check_flags(unsigned int flags) return false; } +void intel_gtt_insert_page(dma_addr_t addr, + unsigned int pg, + unsigned int flags) +{ + intel_private.driver->write_entry(addr, pg, flags); +} +EXPORT_SYMBOL(intel_gtt_insert_page); + void intel_gtt_insert_sg_entries(struct sg_table *st, unsigned int pg_start, unsigned int flags) diff --git a/drivers/char/genrtc.c b/drivers/char/genrtc.c deleted file mode 100644 index 4f943759d376..000000000000 --- a/drivers/char/genrtc.c +++ /dev/null @@ -1,539 +0,0 @@ -/* - * Real Time Clock interface for - * - q40 and other m68k machines, - * - HP PARISC machines - * - PowerPC machines - * emulate some RTC irq capabilities in software - * - * Copyright (C) 1999 Richard Zidlicky - * - * based on Paul Gortmaker's rtc.c device and - * Sam Creasey Generic rtc driver - * - * This driver allows use of the real time clock (built into - * nearly all computers) from user space. It exports the /dev/rtc - * interface supporting various ioctl() and also the /proc/driver/rtc - * pseudo-file for status information. - * - * The ioctls can be used to set the interrupt behaviour where - * supported. - * - * The /dev/rtc interface will block on reads until an interrupt - * has been received. If a RTC interrupt has already happened, - * it will output an unsigned long and then block. The output value - * contains the interrupt status in the low byte and the number of - * interrupts since the last read in the remaining high bytes. The - * /dev/rtc interface can also be used with the select(2) call. - * - * 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. - * - - * 1.01 fix for 2.3.X rz@linux-m68k.org - * 1.02 merged with code from genrtc.c rz@linux-m68k.org - * 1.03 make it more portable zippel@linux-m68k.org - * 1.04 removed useless timer code rz@linux-m68k.org - * 1.05 portable RTC_UIE emulation rz@linux-m68k.org - * 1.06 set_rtc_time can return an error trini@kernel.crashing.org - * 1.07 ported to HP PARISC (hppa) Helge Deller <deller@gmx.de> - */ - -#define RTC_VERSION "1.07" - -#include <linux/module.h> -#include <linux/sched.h> -#include <linux/errno.h> -#include <linux/miscdevice.h> -#include <linux/fcntl.h> - -#include <linux/rtc.h> -#include <linux/init.h> -#include <linux/poll.h> -#include <linux/proc_fs.h> -#include <linux/seq_file.h> -#include <linux/mutex.h> -#include <linux/workqueue.h> - -#include <asm/uaccess.h> -#include <asm/rtc.h> - -/* - * We sponge a minor off of the misc major. No need slurping - * up another valuable major dev number for this. If you add - * an ioctl, make sure you don't conflict with SPARC's RTC - * ioctls. - */ - -static DEFINE_MUTEX(gen_rtc_mutex); -static DECLARE_WAIT_QUEUE_HEAD(gen_rtc_wait); - -/* - * Bits in gen_rtc_status. - */ - -#define RTC_IS_OPEN 0x01 /* means /dev/rtc is in use */ - -static unsigned char gen_rtc_status; /* bitmapped status byte. */ -static unsigned long gen_rtc_irq_data; /* our output to the world */ - -/* months start at 0 now */ -static unsigned char days_in_mo[] = -{31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31}; - -static int irq_active; - -#ifdef CONFIG_GEN_RTC_X -static struct work_struct genrtc_task; -static struct timer_list timer_task; - -static unsigned int oldsecs; -static int lostint; -static unsigned long tt_exp; - -static void gen_rtc_timer(unsigned long data); - -static volatile int stask_active; /* schedule_work */ -static volatile int ttask_active; /* timer_task */ -static int stop_rtc_timers; /* don't requeue tasks */ -static DEFINE_SPINLOCK(gen_rtc_lock); - -static void gen_rtc_interrupt(unsigned long arg); - -/* - * Routine to poll RTC seconds field for change as often as possible, - * after first RTC_UIE use timer to reduce polling - */ -static void genrtc_troutine(struct work_struct *work) -{ - unsigned int tmp = get_rtc_ss(); - - if (stop_rtc_timers) { - stask_active = 0; - return; - } - - if (oldsecs != tmp){ - oldsecs = tmp; - - timer_task.function = gen_rtc_timer; - timer_task.expires = jiffies + HZ - (HZ/10); - tt_exp=timer_task.expires; - ttask_active=1; - stask_active=0; - add_timer(&timer_task); - - gen_rtc_interrupt(0); - } else if (schedule_work(&genrtc_task) == 0) - stask_active = 0; -} - -static void gen_rtc_timer(unsigned long data) -{ - lostint = get_rtc_ss() - oldsecs ; - if (lostint<0) - lostint = 60 - lostint; - if (time_after(jiffies, tt_exp)) - printk(KERN_INFO "genrtc: timer task delayed by %ld jiffies\n", - jiffies-tt_exp); - ttask_active=0; - stask_active=1; - if ((schedule_work(&genrtc_task) == 0)) - stask_active = 0; -} - -/* - * call gen_rtc_interrupt function to signal an RTC_UIE, - * arg is unused. - * Could be invoked either from a real interrupt handler or - * from some routine that periodically (eg 100HZ) monitors - * whether RTC_SECS changed - */ -static void gen_rtc_interrupt(unsigned long arg) -{ - /* We store the status in the low byte and the number of - * interrupts received since the last read in the remainder - * of rtc_irq_data. */ - - gen_rtc_irq_data += 0x100; - gen_rtc_irq_data &= ~0xff; - gen_rtc_irq_data |= RTC_UIE; - - if (lostint){ - printk("genrtc: system delaying clock ticks?\n"); - /* increment count so that userspace knows something is wrong */ - gen_rtc_irq_data += ((lostint-1)<<8); - lostint = 0; - } - - wake_up_interruptible(&gen_rtc_wait); -} - -/* - * Now all the various file operations that we export. - */ -static ssize_t gen_rtc_read(struct file *file, char __user *buf, - size_t count, loff_t *ppos) -{ - unsigned long data; - ssize_t retval; - - if (count != sizeof (unsigned int) && count != sizeof (unsigned long)) - return -EINVAL; - - if (file->f_flags & O_NONBLOCK && !gen_rtc_irq_data) - return -EAGAIN; - - retval = wait_event_interruptible(gen_rtc_wait, - (data = xchg(&gen_rtc_irq_data, 0))); - if (retval) - goto out; - - /* first test allows optimizer to nuke this case for 32-bit machines */ - if (sizeof (int) != sizeof (long) && count == sizeof (unsigned int)) { - unsigned int uidata = data; - retval = put_user(uidata, (unsigned int __user *)buf) ?: - sizeof(unsigned int); - } - else { - retval = put_user(data, (unsigned long __user *)buf) ?: - sizeof(unsigned long); - } -out: - return retval; -} - -static unsigned int gen_rtc_poll(struct file *file, - struct poll_table_struct *wait) -{ - poll_wait(file, &gen_rtc_wait, wait); - if (gen_rtc_irq_data != 0) - return POLLIN | POLLRDNORM; - return 0; -} - -#endif - -/* - * Used to disable/enable interrupts, only RTC_UIE supported - * We also clear out any old irq data after an ioctl() that - * meddles with the interrupt enable/disable bits. - */ - -static inline void gen_clear_rtc_irq_bit(unsigned char bit) -{ -#ifdef CONFIG_GEN_RTC_X - stop_rtc_timers = 1; - if (ttask_active){ - del_timer_sync(&timer_task); - ttask_active = 0; - } - while (stask_active) - schedule(); - - spin_lock(&gen_rtc_lock); - irq_active = 0; - spin_unlock(&gen_rtc_lock); -#endif -} - -static inline int gen_set_rtc_irq_bit(unsigned char bit) -{ -#ifdef CONFIG_GEN_RTC_X - spin_lock(&gen_rtc_lock); - if ( !irq_active ) { - irq_active = 1; - stop_rtc_timers = 0; - lostint = 0; - INIT_WORK(&genrtc_task, genrtc_troutine); - oldsecs = get_rtc_ss(); - init_timer(&timer_task); - - stask_active = 1; - if (schedule_work(&genrtc_task) == 0){ - stask_active = 0; - } - } - spin_unlock(&gen_rtc_lock); - gen_rtc_irq_data = 0; - return 0; -#else - return -EINVAL; -#endif -} - -static int gen_rtc_ioctl(struct file *file, - unsigned int cmd, unsigned long arg) -{ - struct rtc_time wtime; - struct rtc_pll_info pll; - void __user *argp = (void __user *)arg; - - switch (cmd) { - - case RTC_PLL_GET: - if (get_rtc_pll(&pll)) - return -EINVAL; - else - return copy_to_user(argp, &pll, sizeof pll) ? -EFAULT : 0; - - case RTC_PLL_SET: - if (!capable(CAP_SYS_TIME)) - return -EACCES; - if (copy_from_user(&pll, argp, sizeof(pll))) - return -EFAULT; - return set_rtc_pll(&pll); - - case RTC_UIE_OFF: /* disable ints from RTC updates. */ - gen_clear_rtc_irq_bit(RTC_UIE); - return 0; - - case RTC_UIE_ON: /* enable ints for RTC updates. */ - return gen_set_rtc_irq_bit(RTC_UIE); - - case RTC_RD_TIME: /* Read the time/date from RTC */ - /* this doesn't get week-day, who cares */ - memset(&wtime, 0, sizeof(wtime)); - get_rtc_time(&wtime); - - return copy_to_user(argp, &wtime, sizeof(wtime)) ? -EFAULT : 0; - - case RTC_SET_TIME: /* Set the RTC */ - { - int year; - unsigned char leap_yr; - - if (!capable(CAP_SYS_TIME)) - return -EACCES; - - if (copy_from_user(&wtime, argp, sizeof(wtime))) - return -EFAULT; - - year = wtime.tm_year + 1900; - leap_yr = ((!(year % 4) && (year % 100)) || - !(year % 400)); - - if ((wtime.tm_mon < 0 || wtime.tm_mon > 11) || (wtime.tm_mday < 1)) - return -EINVAL; - - if (wtime.tm_mday < 0 || wtime.tm_mday > - (days_in_mo[wtime.tm_mon] + ((wtime.tm_mon == 1) && leap_yr))) - return -EINVAL; - - if (wtime.tm_hour < 0 || wtime.tm_hour >= 24 || - wtime.tm_min < 0 || wtime.tm_min >= 60 || - wtime.tm_sec < 0 || wtime.tm_sec >= 60) - return -EINVAL; - - return set_rtc_time(&wtime); - } - } - - return -EINVAL; -} - -static long gen_rtc_unlocked_ioctl(struct file *file, unsigned int cmd, - unsigned long arg) -{ - int ret; - - mutex_lock(&gen_rtc_mutex); - ret = gen_rtc_ioctl(file, cmd, arg); - mutex_unlock(&gen_rtc_mutex); - - return ret; -} - -/* - * We enforce only one user at a time here with the open/close. - * Also clear the previous interrupt data on an open, and clean - * up things on a close. - */ - -static int gen_rtc_open(struct inode *inode, struct file *file) -{ - mutex_lock(&gen_rtc_mutex); - if (gen_rtc_status & RTC_IS_OPEN) { - mutex_unlock(&gen_rtc_mutex); - return -EBUSY; - } - - gen_rtc_status |= RTC_IS_OPEN; - gen_rtc_irq_data = 0; - irq_active = 0; - mutex_unlock(&gen_rtc_mutex); - - return 0; -} - -static int gen_rtc_release(struct inode *inode, struct file *file) -{ - /* - * Turn off all interrupts once the device is no longer - * in use and clear the data. - */ - - gen_clear_rtc_irq_bit(RTC_PIE|RTC_AIE|RTC_UIE); - - gen_rtc_status &= ~RTC_IS_OPEN; - return 0; -} - - -#ifdef CONFIG_PROC_FS - -/* - * Info exported via "/proc/driver/rtc". - */ - -static int gen_rtc_proc_show(struct seq_file *m, void *v) -{ - struct rtc_time tm; - unsigned int flags; - struct rtc_pll_info pll; - - flags = get_rtc_time(&tm); - - seq_printf(m, - "rtc_time\t: %02d:%02d:%02d\n" - "rtc_date\t: %04d-%02d-%02d\n" - "rtc_epoch\t: %04u\n", - tm.tm_hour, tm.tm_min, tm.tm_sec, - tm.tm_year + 1900, tm.tm_mon + 1, tm.tm_mday, 1900); - - tm.tm_hour = tm.tm_min = tm.tm_sec = 0; - - seq_puts(m, "alarm\t\t: "); - if (tm.tm_hour <= 24) - seq_printf(m, "%02d:", tm.tm_hour); - else - seq_puts(m, "**:"); - - if (tm.tm_min <= 59) - seq_printf(m, "%02d:", tm.tm_min); - else - seq_puts(m, "**:"); - - if (tm.tm_sec <= 59) - seq_printf(m, "%02d\n", tm.tm_sec); - else - seq_puts(m, "**\n"); - - seq_printf(m, - "DST_enable\t: %s\n" - "BCD\t\t: %s\n" - "24hr\t\t: %s\n" - "square_wave\t: %s\n" - "alarm_IRQ\t: %s\n" - "update_IRQ\t: %s\n" - "periodic_IRQ\t: %s\n" - "periodic_freq\t: %ld\n" - "batt_status\t: %s\n", - (flags & RTC_DST_EN) ? "yes" : "no", - (flags & RTC_DM_BINARY) ? "no" : "yes", - (flags & RTC_24H) ? "yes" : "no", - (flags & RTC_SQWE) ? "yes" : "no", - (flags & RTC_AIE) ? "yes" : "no", - irq_active ? "yes" : "no", - (flags & RTC_PIE) ? "yes" : "no", - 0L /* freq */, - (flags & RTC_BATT_BAD) ? "bad" : "okay"); - if (!get_rtc_pll(&pll)) - seq_printf(m, - "PLL adjustment\t: %d\n" - "PLL max +ve adjustment\t: %d\n" - "PLL max -ve adjustment\t: %d\n" - "PLL +ve adjustment factor\t: %d\n" - "PLL -ve adjustment factor\t: %d\n" - "PLL frequency\t: %ld\n", - pll.pll_value, - pll.pll_max, - pll.pll_min, - pll.pll_posmult, - pll.pll_negmult, - pll.pll_clock); - return 0; -} - -static int gen_rtc_proc_open(struct inode *inode, struct file *file) -{ - return single_open(file, gen_rtc_proc_show, NULL); -} - -static const struct file_operations gen_rtc_proc_fops = { - .open = gen_rtc_proc_open, - .read = seq_read, - .llseek = seq_lseek, - .release = single_release, -}; - -static int __init gen_rtc_proc_init(void) -{ - struct proc_dir_entry *r; - - r = proc_create("driver/rtc", 0, NULL, &gen_rtc_proc_fops); - if (!r) - return -ENOMEM; - return 0; -} -#else -static inline int gen_rtc_proc_init(void) { return 0; } -#endif /* CONFIG_PROC_FS */ - - -/* - * The various file operations we support. - */ - -static const struct file_operations gen_rtc_fops = { - .owner = THIS_MODULE, -#ifdef CONFIG_GEN_RTC_X - .read = gen_rtc_read, - .poll = gen_rtc_poll, -#endif - .unlocked_ioctl = gen_rtc_unlocked_ioctl, - .open = gen_rtc_open, - .release = gen_rtc_release, - .llseek = noop_llseek, -}; - -static struct miscdevice rtc_gen_dev = -{ - .minor = RTC_MINOR, - .name = "rtc", - .fops = &gen_rtc_fops, -}; - -static int __init rtc_generic_init(void) -{ - int retval; - - printk(KERN_INFO "Generic RTC Driver v%s\n", RTC_VERSION); - - retval = misc_register(&rtc_gen_dev); - if (retval < 0) - return retval; - - retval = gen_rtc_proc_init(); - if (retval) { - misc_deregister(&rtc_gen_dev); - return retval; - } - - return 0; -} - -static void __exit rtc_generic_exit(void) -{ - remove_proc_entry ("driver/rtc", NULL); - misc_deregister(&rtc_gen_dev); -} - - -module_init(rtc_generic_init); -module_exit(rtc_generic_exit); - -MODULE_AUTHOR("Richard Zidlicky"); -MODULE_LICENSE("GPL"); -MODULE_ALIAS_MISCDEV(RTC_MINOR); diff --git a/drivers/char/powernv-op-panel.c b/drivers/char/powernv-op-panel.c new file mode 100644 index 000000000000..a45dabcc8e10 --- /dev/null +++ b/drivers/char/powernv-op-panel.c @@ -0,0 +1,223 @@ +/* + * OPAL Operator Panel Display Driver + * + * Copyright 2016, Suraj Jitindar Singh, IBM Corporation. + */ + +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt + +#include <linux/init.h> +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/fs.h> +#include <linux/device.h> +#include <linux/errno.h> +#include <linux/mutex.h> +#include <linux/of.h> +#include <linux/slab.h> +#include <linux/platform_device.h> +#include <linux/miscdevice.h> + +#include <asm/opal.h> + +/* + * This driver creates a character device (/dev/op_panel) which exposes the + * operator panel (character LCD display) on IBM Power Systems machines + * with FSPs. + * A character buffer written to the device will be displayed on the + * operator panel. + */ + +static DEFINE_MUTEX(oppanel_mutex); + +static u32 num_lines, oppanel_size; +static oppanel_line_t *oppanel_lines; +static char *oppanel_data; + +static loff_t oppanel_llseek(struct file *filp, loff_t offset, int whence) +{ + return fixed_size_llseek(filp, offset, whence, oppanel_size); +} + +static ssize_t oppanel_read(struct file *filp, char __user *userbuf, size_t len, + loff_t *f_pos) +{ + return simple_read_from_buffer(userbuf, len, f_pos, oppanel_data, + oppanel_size); +} + +static int __op_panel_update_display(void) +{ + struct opal_msg msg; + int rc, token; + + token = opal_async_get_token_interruptible(); + if (token < 0) { + if (token != -ERESTARTSYS) + pr_debug("Couldn't get OPAL async token [token=%d]\n", + token); + return token; + } + + rc = opal_write_oppanel_async(token, oppanel_lines, num_lines); + switch (rc) { + case OPAL_ASYNC_COMPLETION: + rc = opal_async_wait_response(token, &msg); + if (rc) { + pr_debug("Failed to wait for async response [rc=%d]\n", + rc); + break; + } + rc = opal_get_async_rc(msg); + if (rc != OPAL_SUCCESS) { + pr_debug("OPAL async call returned failed [rc=%d]\n", + rc); + break; + } + case OPAL_SUCCESS: + break; + default: + pr_debug("OPAL write op-panel call failed [rc=%d]\n", rc); + } + + opal_async_release_token(token); + return rc; +} + +static ssize_t oppanel_write(struct file *filp, const char __user *userbuf, + size_t len, loff_t *f_pos) +{ + loff_t f_pos_prev = *f_pos; + ssize_t ret; + int rc; + + if (!*f_pos) + memset(oppanel_data, ' ', oppanel_size); + else if (*f_pos >= oppanel_size) + return -EFBIG; + + ret = simple_write_to_buffer(oppanel_data, oppanel_size, f_pos, userbuf, + len); + if (ret > 0) { + rc = __op_panel_update_display(); + if (rc != OPAL_SUCCESS) { + pr_err_ratelimited("OPAL call failed to write to op panel display [rc=%d]\n", + rc); + *f_pos = f_pos_prev; + return -EIO; + } + } + return ret; +} + +static int oppanel_open(struct inode *inode, struct file *filp) +{ + if (!mutex_trylock(&oppanel_mutex)) { + pr_debug("Device Busy\n"); + return -EBUSY; + } + return 0; +} + +static int oppanel_release(struct inode *inode, struct file *filp) +{ + mutex_unlock(&oppanel_mutex); + return 0; +} + +static const struct file_operations oppanel_fops = { + .owner = THIS_MODULE, + .llseek = oppanel_llseek, + .read = oppanel_read, + .write = oppanel_write, + .open = oppanel_open, + .release = oppanel_release +}; + +static struct miscdevice oppanel_dev = { + .minor = MISC_DYNAMIC_MINOR, + .name = "op_panel", + .fops = &oppanel_fops +}; + +static int oppanel_probe(struct platform_device *pdev) +{ + struct device_node *np = pdev->dev.of_node; + u32 line_len; + int rc, i; + + rc = of_property_read_u32(np, "#length", &line_len); + if (rc) { + pr_err_ratelimited("Operator panel length property not found\n"); + return rc; + } + rc = of_property_read_u32(np, "#lines", &num_lines); + if (rc) { + pr_err_ratelimited("Operator panel lines property not found\n"); + return rc; + } + oppanel_size = line_len * num_lines; + + pr_devel("Operator panel of size %u found with %u lines of length %u\n", + oppanel_size, num_lines, line_len); + + oppanel_data = kcalloc(oppanel_size, sizeof(*oppanel_data), GFP_KERNEL); + if (!oppanel_data) + return -ENOMEM; + + oppanel_lines = kcalloc(num_lines, sizeof(oppanel_line_t), GFP_KERNEL); + if (!oppanel_lines) { + rc = -ENOMEM; + goto free_oppanel_data; + } + + memset(oppanel_data, ' ', oppanel_size); + for (i = 0; i < num_lines; i++) { + oppanel_lines[i].line_len = cpu_to_be64(line_len); + oppanel_lines[i].line = cpu_to_be64(__pa(&oppanel_data[i * + line_len])); + } + + rc = misc_register(&oppanel_dev); + if (rc) { + pr_err_ratelimited("Failed to register as misc device\n"); + goto free_oppanel; + } + + return 0; + +free_oppanel: + kfree(oppanel_lines); +free_oppanel_data: + kfree(oppanel_data); + return rc; +} + +static int oppanel_remove(struct platform_device *pdev) +{ + misc_deregister(&oppanel_dev); + kfree(oppanel_lines); + kfree(oppanel_data); + return 0; +} + +static const struct of_device_id oppanel_match[] = { + { .compatible = "ibm,opal-oppanel" }, + { }, +}; + +static struct platform_driver oppanel_driver = { + .driver = { + .name = "powernv-op-panel", + .of_match_table = oppanel_match, + }, + .probe = oppanel_probe, + .remove = oppanel_remove, +}; + +module_platform_driver(oppanel_driver); + +MODULE_DEVICE_TABLE(of, oppanel_match); +MODULE_LICENSE("GPL v2"); +MODULE_DESCRIPTION("PowerNV Operator Panel LCD Display Driver"); +MODULE_AUTHOR("Suraj Jitindar Singh <sjitindarsingh@gmail.com>"); diff --git a/drivers/char/random.c b/drivers/char/random.c index 7f0622426b97..3efb3bf0ab83 100644 --- a/drivers/char/random.c +++ b/drivers/char/random.c @@ -249,6 +249,7 @@ #include <linux/genhd.h> #include <linux/interrupt.h> #include <linux/mm.h> +#include <linux/nodemask.h> #include <linux/spinlock.h> #include <linux/kthread.h> #include <linux/percpu.h> @@ -1656,7 +1657,6 @@ static int rand_initialize(void) { #ifdef CONFIG_NUMA int i; - int num_nodes = num_possible_nodes(); struct crng_state *crng; struct crng_state **pool; #endif @@ -1666,8 +1666,7 @@ static int rand_initialize(void) crng_initialize(&primary_crng); #ifdef CONFIG_NUMA - pool = kmalloc(num_nodes * sizeof(void *), - GFP_KERNEL|__GFP_NOFAIL|__GFP_ZERO); + pool = kcalloc(nr_node_ids, sizeof(*pool), GFP_KERNEL|__GFP_NOFAIL); for_each_online_node(i) { crng = kmalloc_node(sizeof(struct crng_state), GFP_KERNEL | __GFP_NOFAIL, i); |