diff options
Diffstat (limited to 'drivers/staging/android')
| -rw-r--r-- | drivers/staging/android/Kconfig | 30 | ||||
| -rw-r--r-- | drivers/staging/android/Makefile | 2 | ||||
| -rw-r--r-- | drivers/staging/android/alarm-dev.c | 137 | ||||
| -rw-r--r-- | drivers/staging/android/alarm.c | 601 | ||||
| -rw-r--r-- | drivers/staging/android/android_alarm.h | 59 | ||||
| -rw-r--r-- | drivers/staging/android/binder.h | 10 | ||||
| -rw-r--r-- | drivers/staging/android/logger.c | 113 | ||||
| -rw-r--r-- | drivers/staging/android/persistent_ram.c | 473 | ||||
| -rw-r--r-- | drivers/staging/android/persistent_ram.h | 78 | ||||
| -rw-r--r-- | drivers/staging/android/ram_console.c | 2 | ||||
| -rw-r--r-- | drivers/staging/android/timed_output.c | 1 |
11 files changed, 181 insertions, 1325 deletions
diff --git a/drivers/staging/android/Kconfig b/drivers/staging/android/Kconfig index c706635f3f82..0e16b594460f 100644 --- a/drivers/staging/android/Kconfig +++ b/drivers/staging/android/Kconfig @@ -25,17 +25,9 @@ config ANDROID_LOGGER tristate "Android log driver" default n -config ANDROID_PERSISTENT_RAM - bool - depends on HAVE_MEMBLOCK - select REED_SOLOMON - select REED_SOLOMON_ENC8 - select REED_SOLOMON_DEC8 - config ANDROID_RAM_CONSOLE bool "Android RAM buffer console" - depends on !S390 && !UML && HAVE_MEMBLOCK - select ANDROID_PERSISTENT_RAM + depends on !S390 && !UML && HAVE_MEMBLOCK && PSTORE_RAM=y default n config ANDROID_TIMED_OUTPUT @@ -53,31 +45,15 @@ config ANDROID_LOW_MEMORY_KILLER ---help--- Register processes to be killed when memory is low -config ANDROID_INTF_ALARM +config ANDROID_INTF_ALARM_DEV bool "Android alarm driver" depends on RTC_CLASS default n help Provides non-wakeup and rtc backed wakeup alarms based on rtc or elapsed realtime, and a non-wakeup alarm on the monotonic clock. - Also provides an interface to set the wall time which must be used - for elapsed realtime to work. - -config ANDROID_INTF_ALARM_DEV - bool "Android alarm device" - depends on ANDROID_INTF_ALARM - default y - help - Exports the alarm interface to user-space. + Also exports the alarm interface to user-space. -config ANDROID_ALARM_OLDDRV_COMPAT - bool "Android Alarm compatability with old drivers" - depends on ANDROID_INTF_ALARM - default n - help - Provides preprocessor alias to aid compatability with - older out-of-tree drivers that use the Android Alarm - in-kernel API. This will be removed eventually. endif # if ANDROID endmenu diff --git a/drivers/staging/android/Makefile b/drivers/staging/android/Makefile index 045d17bde524..98711e2b2afa 100644 --- a/drivers/staging/android/Makefile +++ b/drivers/staging/android/Makefile @@ -1,10 +1,8 @@ obj-$(CONFIG_ANDROID_BINDER_IPC) += binder.o obj-$(CONFIG_ASHMEM) += ashmem.o obj-$(CONFIG_ANDROID_LOGGER) += logger.o -obj-$(CONFIG_ANDROID_PERSISTENT_RAM) += persistent_ram.o obj-$(CONFIG_ANDROID_RAM_CONSOLE) += ram_console.o obj-$(CONFIG_ANDROID_TIMED_OUTPUT) += timed_output.o obj-$(CONFIG_ANDROID_TIMED_GPIO) += timed_gpio.o obj-$(CONFIG_ANDROID_LOW_MEMORY_KILLER) += lowmemorykiller.o -obj-$(CONFIG_ANDROID_INTF_ALARM) += alarm.o obj-$(CONFIG_ANDROID_INTF_ALARM_DEV) += alarm-dev.o diff --git a/drivers/staging/android/alarm-dev.c b/drivers/staging/android/alarm-dev.c index 03efb34cbe2e..53ce6ecf390a 100644 --- a/drivers/staging/android/alarm-dev.c +++ b/drivers/staging/android/alarm-dev.c @@ -22,19 +22,9 @@ #include <linux/sched.h> #include <linux/spinlock.h> #include <linux/uaccess.h> +#include <linux/alarmtimer.h> #include "android_alarm.h" -/* XXX - Hack out wakelocks, while they are out of tree */ -struct wake_lock { - int i; -}; -#define wake_lock(x) -#define wake_lock_timeout(x, y) -#define wake_unlock(x) -#define WAKE_LOCK_SUSPEND 0 -#define wake_lock_init(x, y, z) ((x)->i = 1) -#define wake_lock_destroy(x) - #define ANDROID_ALARM_PRINT_INFO (1U << 0) #define ANDROID_ALARM_PRINT_IO (1U << 1) #define ANDROID_ALARM_PRINT_INT (1U << 2) @@ -54,19 +44,65 @@ module_param_named(debug_mask, debug_mask, int, S_IRUGO | S_IWUSR | S_IWGRP); ANDROID_ALARM_RTC_WAKEUP_MASK | \ ANDROID_ALARM_ELAPSED_REALTIME_WAKEUP_MASK) -/* support old usespace code */ +/* support old userspace code */ #define ANDROID_ALARM_SET_OLD _IOW('a', 2, time_t) /* set alarm */ #define ANDROID_ALARM_SET_AND_WAIT_OLD _IOW('a', 3, time_t) static int alarm_opened; static DEFINE_SPINLOCK(alarm_slock); -static struct wake_lock alarm_wake_lock; +static struct wakeup_source alarm_wake_lock; static DECLARE_WAIT_QUEUE_HEAD(alarm_wait_queue); static uint32_t alarm_pending; static uint32_t alarm_enabled; static uint32_t wait_pending; -static struct android_alarm alarms[ANDROID_ALARM_TYPE_COUNT]; +struct devalarm { + union { + struct hrtimer hrt; + struct alarm alrm; + } u; + enum android_alarm_type type; +}; + +static struct devalarm alarms[ANDROID_ALARM_TYPE_COUNT]; + + +static int is_wakeup(enum android_alarm_type type) +{ + if (type == ANDROID_ALARM_RTC_WAKEUP || + type == ANDROID_ALARM_ELAPSED_REALTIME_WAKEUP) + return 1; + return 0; +} + + +static void devalarm_start(struct devalarm *alrm, ktime_t exp) +{ + if (is_wakeup(alrm->type)) + alarm_start(&alrm->u.alrm, exp); + else + hrtimer_start(&alrm->u.hrt, exp, HRTIMER_MODE_ABS); +} + + +static int devalarm_try_to_cancel(struct devalarm *alrm) +{ + int ret; + if (is_wakeup(alrm->type)) + ret = alarm_try_to_cancel(&alrm->u.alrm); + else + ret = hrtimer_try_to_cancel(&alrm->u.hrt); + return ret; +} + +static void devalarm_cancel(struct devalarm *alrm) +{ + if (is_wakeup(alrm->type)) + alarm_cancel(&alrm->u.alrm); + else + hrtimer_cancel(&alrm->u.hrt); +} + static long alarm_ioctl(struct file *file, unsigned int cmd, unsigned long arg) { @@ -75,6 +111,8 @@ static long alarm_ioctl(struct file *file, unsigned int cmd, unsigned long arg) struct timespec new_alarm_time; struct timespec new_rtc_time; struct timespec tmp_time; + struct rtc_time new_rtc_tm; + struct rtc_device *rtc_dev; enum android_alarm_type alarm_type = ANDROID_ALARM_IOCTL_TO_TYPE(cmd); uint32_t alarm_type_mask = 1U << alarm_type; @@ -101,11 +139,11 @@ static long alarm_ioctl(struct file *file, unsigned int cmd, unsigned long arg) case ANDROID_ALARM_CLEAR(0): spin_lock_irqsave(&alarm_slock, flags); pr_alarm(IO, "alarm %d clear\n", alarm_type); - android_alarm_try_to_cancel(&alarms[alarm_type]); + devalarm_try_to_cancel(&alarms[alarm_type]); if (alarm_pending) { alarm_pending &= ~alarm_type_mask; if (!alarm_pending && !wait_pending) - wake_unlock(&alarm_wake_lock); + __pm_relax(&alarm_wake_lock); } alarm_enabled &= ~alarm_type_mask; spin_unlock_irqrestore(&alarm_slock, flags); @@ -132,8 +170,7 @@ from_old_alarm_set: pr_alarm(IO, "alarm %d set %ld.%09ld\n", alarm_type, new_alarm_time.tv_sec, new_alarm_time.tv_nsec); alarm_enabled |= alarm_type_mask; - android_alarm_start_range(&alarms[alarm_type], - timespec_to_ktime(new_alarm_time), + devalarm_start(&alarms[alarm_type], timespec_to_ktime(new_alarm_time)); spin_unlock_irqrestore(&alarm_slock, flags); if (ANDROID_ALARM_BASE_CMD(cmd) != ANDROID_ALARM_SET_AND_WAIT(0) @@ -144,7 +181,7 @@ from_old_alarm_set: spin_lock_irqsave(&alarm_slock, flags); pr_alarm(IO, "alarm wait\n"); if (!alarm_pending && wait_pending) { - wake_unlock(&alarm_wake_lock); + __pm_relax(&alarm_wake_lock); wait_pending = 0; } spin_unlock_irqrestore(&alarm_slock, flags); @@ -163,7 +200,13 @@ from_old_alarm_set: rv = -EFAULT; goto err1; } - rv = android_alarm_set_rtc(new_rtc_time); + rtc_time_to_tm(new_rtc_time.tv_sec, &new_rtc_tm); + rtc_dev = alarmtimer_get_rtcdev(); + rv = do_settimeofday(&new_rtc_time); + if (rv < 0) + goto err1; + if (rtc_dev) + rv = rtc_set_time(rtc_dev, &new_rtc_tm); spin_lock_irqsave(&alarm_slock, flags); alarm_pending |= ANDROID_ALARM_TIME_CHANGE_MASK; wake_up(&alarm_wait_queue); @@ -179,8 +222,7 @@ from_old_alarm_set: break; case ANDROID_ALARM_ELAPSED_REALTIME_WAKEUP: case ANDROID_ALARM_ELAPSED_REALTIME: - tmp_time = - ktime_to_timespec(alarm_get_elapsed_realtime()); + get_monotonic_boottime(&tmp_time); break; case ANDROID_ALARM_TYPE_COUNT: case ANDROID_ALARM_SYSTEMTIME: @@ -224,14 +266,14 @@ static int alarm_release(struct inode *inode, struct file *file) alarm_enabled &= ~alarm_type_mask; } spin_unlock_irqrestore(&alarm_slock, flags); - android_alarm_cancel(&alarms[i]); + devalarm_cancel(&alarms[i]); spin_lock_irqsave(&alarm_slock, flags); } if (alarm_pending | wait_pending) { if (alarm_pending) pr_alarm(INFO, "alarm_release: clear " "pending alarms %x\n", alarm_pending); - wake_unlock(&alarm_wake_lock); + __pm_relax(&alarm_wake_lock); wait_pending = 0; alarm_pending = 0; } @@ -241,15 +283,15 @@ static int alarm_release(struct inode *inode, struct file *file) return 0; } -static void alarm_triggered(struct android_alarm *alarm) +static void devalarm_triggered(struct devalarm *alarm) { unsigned long flags; uint32_t alarm_type_mask = 1U << alarm->type; - pr_alarm(INT, "alarm_triggered type %d\n", alarm->type); + pr_alarm(INT, "devalarm_triggered type %d\n", alarm->type); spin_lock_irqsave(&alarm_slock, flags); if (alarm_enabled & alarm_type_mask) { - wake_lock_timeout(&alarm_wake_lock, 5 * HZ); + __pm_wakeup_event(&alarm_wake_lock, 5000); /* 5secs */ alarm_enabled &= ~alarm_type_mask; alarm_pending |= alarm_type_mask; wake_up(&alarm_wait_queue); @@ -257,6 +299,25 @@ static void alarm_triggered(struct android_alarm *alarm) spin_unlock_irqrestore(&alarm_slock, flags); } + +static enum hrtimer_restart devalarm_hrthandler(struct hrtimer *hrt) +{ + struct devalarm *devalrm = container_of(hrt, struct devalarm, u.hrt); + + devalarm_triggered(devalrm); + return HRTIMER_NORESTART; +} + +static enum alarmtimer_restart devalarm_alarmhandler(struct alarm *alrm, + ktime_t now) +{ + struct devalarm *devalrm = container_of(alrm, struct devalarm, u.alrm); + + devalarm_triggered(devalrm); + return ALARMTIMER_NORESTART; +} + + static const struct file_operations alarm_fops = { .owner = THIS_MODULE, .unlocked_ioctl = alarm_ioctl, @@ -279,17 +340,31 @@ static int __init alarm_dev_init(void) if (err) return err; - for (i = 0; i < ANDROID_ALARM_TYPE_COUNT; i++) - android_alarm_init(&alarms[i], i, alarm_triggered); - wake_lock_init(&alarm_wake_lock, WAKE_LOCK_SUSPEND, "alarm"); + alarm_init(&alarms[ANDROID_ALARM_RTC_WAKEUP].u.alrm, + ALARM_REALTIME, devalarm_alarmhandler); + hrtimer_init(&alarms[ANDROID_ALARM_RTC].u.hrt, + CLOCK_REALTIME, HRTIMER_MODE_ABS); + alarm_init(&alarms[ANDROID_ALARM_ELAPSED_REALTIME_WAKEUP].u.alrm, + ALARM_BOOTTIME, devalarm_alarmhandler); + hrtimer_init(&alarms[ANDROID_ALARM_ELAPSED_REALTIME].u.hrt, + CLOCK_BOOTTIME, HRTIMER_MODE_ABS); + hrtimer_init(&alarms[ANDROID_ALARM_SYSTEMTIME].u.hrt, + CLOCK_MONOTONIC, HRTIMER_MODE_ABS); + + for (i = 0; i < ANDROID_ALARM_TYPE_COUNT; i++) { + alarms[i].type = i; + if (!is_wakeup(i)) + alarms[i].u.hrt.function = devalarm_hrthandler; + } + wakeup_source_init(&alarm_wake_lock, "alarm"); return 0; } static void __exit alarm_dev_exit(void) { misc_deregister(&alarm_device); - wake_lock_destroy(&alarm_wake_lock); + wakeup_source_trash(&alarm_wake_lock); } module_init(alarm_dev_init); diff --git a/drivers/staging/android/alarm.c b/drivers/staging/android/alarm.c deleted file mode 100644 index c68950b9e08f..000000000000 --- a/drivers/staging/android/alarm.c +++ /dev/null @@ -1,601 +0,0 @@ -/* drivers/rtc/alarm.c - * - * Copyright (C) 2007-2009 Google, Inc. - * - * This software is licensed under the terms of the GNU General Public - * License version 2, as published by the Free Software Foundation, and - * may be copied, distributed, and modified under those terms. - * - * 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/time.h> -#include <linux/module.h> -#include <linux/device.h> -#include <linux/miscdevice.h> -#include <linux/platform_device.h> -#include <linux/rtc.h> -#include <linux/sched.h> -#include <linux/spinlock.h> -#include "android_alarm.h" - -/* XXX - Hack out wakelocks, while they are out of tree */ -struct wake_lock { - int i; -}; -#define wake_lock(x) -#define wake_lock_timeout(x, y) -#define wake_unlock(x) -#define WAKE_LOCK_SUSPEND 0 -#define wake_lock_init(x, y, z) ((x)->i = 1) -#define wake_lock_destroy(x) - -#define ANDROID_ALARM_PRINT_ERROR (1U << 0) -#define ANDROID_ALARM_PRINT_INIT_STATUS (1U << 1) -#define ANDROID_ALARM_PRINT_TSET (1U << 2) -#define ANDROID_ALARM_PRINT_CALL (1U << 3) -#define ANDROID_ALARM_PRINT_SUSPEND (1U << 4) -#define ANDROID_ALARM_PRINT_INT (1U << 5) -#define ANDROID_ALARM_PRINT_FLOW (1U << 6) - -static int debug_mask = ANDROID_ALARM_PRINT_ERROR | \ - ANDROID_ALARM_PRINT_INIT_STATUS; -module_param_named(debug_mask, debug_mask, int, S_IRUGO | S_IWUSR | S_IWGRP); - -#define pr_alarm(debug_level_mask, args...) \ - do { \ - if (debug_mask & ANDROID_ALARM_PRINT_##debug_level_mask) { \ - pr_info(args); \ - } \ - } while (0) - -#define ANDROID_ALARM_WAKEUP_MASK ( \ - ANDROID_ALARM_RTC_WAKEUP_MASK | \ - ANDROID_ALARM_ELAPSED_REALTIME_WAKEUP_MASK) - -/* support old usespace code */ -#define ANDROID_ALARM_SET_OLD _IOW('a', 2, time_t) /* set alarm */ -#define ANDROID_ALARM_SET_AND_WAIT_OLD _IOW('a', 3, time_t) - -struct alarm_queue { - struct rb_root alarms; - struct rb_node *first; - struct hrtimer timer; - ktime_t delta; - bool stopped; - ktime_t stopped_time; -}; - -static struct rtc_device *alarm_rtc_dev; -static DEFINE_SPINLOCK(alarm_slock); -static DEFINE_MUTEX(alarm_setrtc_mutex); -static struct wake_lock alarm_rtc_wake_lock; -static struct platform_device *alarm_platform_dev; -struct alarm_queue alarms[ANDROID_ALARM_TYPE_COUNT]; -static bool suspended; - -static void update_timer_locked(struct alarm_queue *base, bool head_removed) -{ - struct android_alarm *alarm; - bool is_wakeup = base == &alarms[ANDROID_ALARM_RTC_WAKEUP] || - base == &alarms[ANDROID_ALARM_ELAPSED_REALTIME_WAKEUP]; - - if (base->stopped) { - pr_alarm(FLOW, "changed alarm while setting the wall time\n"); - return; - } - - if (is_wakeup && !suspended && head_removed) - wake_unlock(&alarm_rtc_wake_lock); - - if (!base->first) - return; - - alarm = container_of(base->first, struct android_alarm, node); - - pr_alarm(FLOW, "selected alarm, type %d, func %pF at %lld\n", - alarm->type, alarm->function, ktime_to_ns(alarm->expires)); - - if (is_wakeup && suspended) { - pr_alarm(FLOW, "changed alarm while suspened\n"); - wake_lock_timeout(&alarm_rtc_wake_lock, 1 * HZ); - return; - } - - hrtimer_try_to_cancel(&base->timer); - base->timer.node.expires = ktime_add(base->delta, alarm->expires); - base->timer._softexpires = ktime_add(base->delta, alarm->softexpires); - hrtimer_start_expires(&base->timer, HRTIMER_MODE_ABS); -} - -static void alarm_enqueue_locked(struct android_alarm *alarm) -{ - struct alarm_queue *base = &alarms[alarm->type]; - struct rb_node **link = &base->alarms.rb_node; - struct rb_node *parent = NULL; - struct android_alarm *entry; - int leftmost = 1; - bool was_first = false; - - pr_alarm(FLOW, "added alarm, type %d, func %pF at %lld\n", - alarm->type, alarm->function, ktime_to_ns(alarm->expires)); - - if (base->first == &alarm->node) { - base->first = rb_next(&alarm->node); - was_first = true; - } - if (!RB_EMPTY_NODE(&alarm->node)) { - rb_erase(&alarm->node, &base->alarms); - RB_CLEAR_NODE(&alarm->node); - } - - while (*link) { - parent = *link; - entry = rb_entry(parent, struct android_alarm, node); - /* - * We dont care about collisions. Nodes with - * the same expiry time stay together. - */ - if (alarm->expires.tv64 < entry->expires.tv64) { - link = &(*link)->rb_left; - } else { - link = &(*link)->rb_right; - leftmost = 0; - } - } - if (leftmost) - base->first = &alarm->node; - if (leftmost || was_first) - update_timer_locked(base, was_first); - - rb_link_node(&alarm->node, parent, link); - rb_insert_color(&alarm->node, &base->alarms); -} - -/** - * android_alarm_init - initialize an alarm - * @alarm: the alarm to be initialized - * @type: the alarm type to be used - * @function: alarm callback function - */ -void android_alarm_init(struct android_alarm *alarm, - enum android_alarm_type type, void (*function)(struct android_alarm *)) -{ - RB_CLEAR_NODE(&alarm->node); - alarm->type = type; - alarm->function = function; - - pr_alarm(FLOW, "created alarm, type %d, func %pF\n", type, function); -} - - -/** - * android_alarm_start_range - (re)start an alarm - * @alarm: the alarm to be added - * @start: earliest expiry time - * @end: expiry time - */ -void android_alarm_start_range(struct android_alarm *alarm, ktime_t start, - ktime_t end) -{ - unsigned long flags; - - spin_lock_irqsave(&alarm_slock, flags); - alarm->softexpires = start; - alarm->expires = end; - alarm_enqueue_locked(alarm); - spin_unlock_irqrestore(&alarm_slock, flags); -} - -/** - * android_alarm_try_to_cancel - try to deactivate an alarm - * @alarm: alarm to stop - * - * Returns: - * 0 when the alarm was not active - * 1 when the alarm was active - * -1 when the alarm may currently be excuting the callback function and - * cannot be stopped (it may also be inactive) - */ -int android_alarm_try_to_cancel(struct android_alarm *alarm) -{ - struct alarm_queue *base = &alarms[alarm->type]; - unsigned long flags; - bool first = false; - int ret = 0; - - spin_lock_irqsave(&alarm_slock, flags); - if (!RB_EMPTY_NODE(&alarm->node)) { - pr_alarm(FLOW, "canceled alarm, type %d, func %pF at %lld\n", - alarm->type, alarm->function, - ktime_to_ns(alarm->expires)); - ret = 1; - if (base->first == &alarm->node) { - base->first = rb_next(&alarm->node); - first = true; - } - rb_erase(&alarm->node, &base->alarms); - RB_CLEAR_NODE(&alarm->node); - if (first) - update_timer_locked(base, true); - } else - pr_alarm(FLOW, "tried to cancel alarm, type %d, func %pF\n", - alarm->type, alarm->function); - spin_unlock_irqrestore(&alarm_slock, flags); - if (!ret && hrtimer_callback_running(&base->timer)) - ret = -1; - return ret; -} - -/** - * android_alarm_cancel - cancel an alarm and wait for the handler to finish. - * @alarm: the alarm to be cancelled - * - * Returns: - * 0 when the alarm was not active - * 1 when the alarm was active - */ -int android_alarm_cancel(struct android_alarm *alarm) -{ - for (;;) { - int ret = android_alarm_try_to_cancel(alarm); - if (ret >= 0) - return ret; - cpu_relax(); - } -} - -/** - * alarm_set_rtc - set the kernel and rtc walltime - * @new_time: timespec value containing the new time - */ -int android_alarm_set_rtc(struct timespec new_time) -{ - int i; - int ret; - unsigned long flags; - struct rtc_time rtc_new_rtc_time; - struct timespec tmp_time; - - rtc_time_to_tm(new_time.tv_sec, &rtc_new_rtc_time); - - pr_alarm(TSET, "set rtc %ld %ld - rtc %02d:%02d:%02d %02d/%02d/%04d\n", - new_time.tv_sec, new_time.tv_nsec, - rtc_new_rtc_time.tm_hour, rtc_new_rtc_time.tm_min, - rtc_new_rtc_time.tm_sec, rtc_new_rtc_time.tm_mon + 1, - rtc_new_rtc_time.tm_mday, - rtc_new_rtc_time.tm_year + 1900); - - mutex_lock(&alarm_setrtc_mutex); - spin_lock_irqsave(&alarm_slock, flags); - wake_lock(&alarm_rtc_wake_lock); - getnstimeofday(&tmp_time); - for (i = 0; i < ANDROID_ALARM_SYSTEMTIME; i++) { - hrtimer_try_to_cancel(&alarms[i].timer); - alarms[i].stopped = true; - alarms[i].stopped_time = timespec_to_ktime(tmp_time); - } - alarms[ANDROID_ALARM_ELAPSED_REALTIME_WAKEUP].delta = - alarms[ANDROID_ALARM_ELAPSED_REALTIME].delta = - ktime_sub(alarms[ANDROID_ALARM_ELAPSED_REALTIME].delta, - timespec_to_ktime(timespec_sub(tmp_time, new_time))); - spin_unlock_irqrestore(&alarm_slock, flags); - ret = do_settimeofday(&new_time); - spin_lock_irqsave(&alarm_slock, flags); - for (i = 0; i < ANDROID_ALARM_SYSTEMTIME; i++) { - alarms[i].stopped = false; - update_timer_locked(&alarms[i], false); - } - spin_unlock_irqrestore(&alarm_slock, flags); - if (ret < 0) { - pr_alarm(ERROR, "alarm_set_rtc: Failed to set time\n"); - goto err; - } - if (!alarm_rtc_dev) { - pr_alarm(ERROR, - "alarm_set_rtc: no RTC, time will be lost on reboot\n"); - goto err; - } - ret = rtc_set_time(alarm_rtc_dev, &rtc_new_rtc_time); - if (ret < 0) - pr_alarm(ERROR, "alarm_set_rtc: " - "Failed to set RTC, time will be lost on reboot\n"); -err: - wake_unlock(&alarm_rtc_wake_lock); - mutex_unlock(&alarm_setrtc_mutex); - return ret; -} - -/** - * alarm_get_elapsed_realtime - get the elapsed real time in ktime_t format - * - * returns the time in ktime_t format - */ -ktime_t alarm_get_elapsed_realtime(void) -{ - ktime_t now; - unsigned long flags; - struct alarm_queue *base = &alarms[ANDROID_ALARM_ELAPSED_REALTIME]; - - spin_lock_irqsave(&alarm_slock, flags); - now = base->stopped ? base->stopped_time : ktime_get_real(); - now = ktime_sub(now, base->delta); - spin_unlock_irqrestore(&alarm_slock, flags); - return now; -} - -static enum hrtimer_restart alarm_timer_triggered(struct hrtimer *timer) -{ - struct alarm_queue *base; - struct android_alarm *alarm; - unsigned long flags; - ktime_t now; - - spin_lock_irqsave(&alarm_slock, flags); - - base = container_of(timer, struct alarm_queue, timer); - now = base->stopped ? base->stopped_time : hrtimer_cb_get_time(timer); - now = ktime_sub(now, base->delta); - - pr_alarm(INT, "alarm_timer_triggered type %ld at %lld\n", - base - alarms, ktime_to_ns(now)); - - while (base->first) { - alarm = container_of(base->first, struct android_alarm, node); - if (alarm->softexpires.tv64 > now.tv64) { - pr_alarm(FLOW, "don't call alarm, %pF, %lld (s %lld)\n", - alarm->function, ktime_to_ns(alarm->expires), - ktime_to_ns(alarm->softexpires)); - break; - } - base->first = rb_next(&alarm->node); - rb_erase(&alarm->node, &base->alarms); - RB_CLEAR_NODE(&alarm->node); - pr_alarm(CALL, "call alarm, type %d, func %pF, %lld (s %lld)\n", - alarm->type, alarm->function, - ktime_to_ns(alarm->expires), - ktime_to_ns(alarm->softexpires)); - spin_unlock_irqrestore(&alarm_slock, flags); - alarm->function(alarm); - spin_lock_irqsave(&alarm_slock, flags); - } - if (!base->first) - pr_alarm(FLOW, "no more alarms of type %ld\n", base - alarms); - update_timer_locked(base, true); - spin_unlock_irqrestore(&alarm_slock, flags); - return HRTIMER_NORESTART; -} - -static void alarm_triggered_func(void *p) -{ - struct rtc_device *rtc = alarm_rtc_dev; - if (!(rtc->irq_data & RTC_AF)) - return; - pr_alarm(INT, "rtc alarm triggered\n"); - wake_lock_timeout(&alarm_rtc_wake_lock, 1 * HZ); -} - -static int alarm_suspend(struct platform_device *pdev, pm_message_t state) -{ - int err = 0; - unsigned long flags; - struct rtc_wkalrm rtc_alarm; - struct rtc_time rtc_current_rtc_time; - unsigned long rtc_current_time; - unsigned long rtc_alarm_time; - struct timespec rtc_delta; - struct timespec wall_time; - struct alarm_queue *wakeup_queue = NULL; - struct alarm_queue *tmp_queue = NULL; - - pr_alarm(SUSPEND, "alarm_suspend(%p, %d)\n", pdev, state.event); - - spin_lock_irqsave(&alarm_slock, flags); - suspended = true; - spin_unlock_irqrestore(&alarm_slock, flags); - - hrtimer_cancel(&alarms[ANDROID_ALARM_RTC_WAKEUP].timer); - hrtimer_cancel(&alarms[ - ANDROID_ALARM_ELAPSED_REALTIME_WAKEUP].timer); - - tmp_queue = &alarms[ANDROID_ALARM_RTC_WAKEUP]; - if (tmp_queue->first) - wakeup_queue = tmp_queue; - tmp_queue = &alarms[ANDROID_ALARM_ELAPSED_REALTIME_WAKEUP]; - if (tmp_queue->first && (!wakeup_queue || - hrtimer_get_expires(&tmp_queue->timer).tv64 < - hrtimer_get_expires(&wakeup_queue->timer).tv64)) - wakeup_queue = tmp_queue; - if (wakeup_queue) { - rtc_read_time(alarm_rtc_dev, &rtc_current_rtc_time); - getnstimeofday(&wall_time); - rtc_tm_to_time(&rtc_current_rtc_time, &rtc_current_time); - set_normalized_timespec(&rtc_delta, - wall_time.tv_sec - rtc_current_time, - wall_time.tv_nsec); - - rtc_alarm_time = timespec_sub(ktime_to_timespec( - hrtimer_get_expires(&wakeup_queue->timer)), - rtc_delta).tv_sec; - - rtc_time_to_tm(rtc_alarm_time, &rtc_alarm.time); - rtc_alarm.enabled = 1; - rtc_set_alarm(alarm_rtc_dev, &rtc_alarm); - rtc_read_time(alarm_rtc_dev, &rtc_current_rtc_time); - rtc_tm_to_time(&rtc_current_rtc_time, &rtc_current_time); - pr_alarm(SUSPEND, - "rtc alarm set at %ld, now %ld, rtc delta %ld.%09ld\n", - rtc_alarm_time, rtc_current_time, - rtc_delta.tv_sec, rtc_delta.tv_nsec); - if (rtc_current_time + 1 >= rtc_alarm_time) { - pr_alarm(SUSPEND, "alarm about to go off\n"); - memset(&rtc_alarm, 0, sizeof(rtc_alarm)); - rtc_alarm.enabled = 0; - rtc_set_alarm(alarm_rtc_dev, &rtc_alarm); - - spin_lock_irqsave(&alarm_slock, flags); - suspended = false; - wake_lock_timeout(&alarm_rtc_wake_lock, 2 * HZ); - update_timer_locked(&alarms[ANDROID_ALARM_RTC_WAKEUP], - false); - update_timer_locked(&alarms[ - ANDROID_ALARM_ELAPSED_REALTIME_WAKEUP], false); - err = -EBUSY; - spin_unlock_irqrestore(&alarm_slock, flags); - } - } - return err; -} - -static int alarm_resume(struct platform_device *pdev) -{ - struct rtc_wkalrm alarm; - unsigned long flags; - - pr_alarm(SUSPEND, "alarm_resume(%p)\n", pdev); - - memset(&alarm, 0, sizeof(alarm)); - alarm.enabled = 0; - rtc_set_alarm(alarm_rtc_dev, &alarm); - - spin_lock_irqsave(&alarm_slock, flags); - suspended = false; - update_timer_locked(&alarms[ANDROID_ALARM_RTC_WAKEUP], false); - update_timer_locked(&alarms[ANDROID_ALARM_ELAPSED_REALTIME_WAKEUP], - false); - spin_unlock_irqrestore(&alarm_slock, flags); - - return 0; -} - -static struct rtc_task alarm_rtc_task = { - .func = alarm_triggered_func -}; - -static int rtc_alarm_add_device(struct device *dev, - struct class_interface *class_intf) -{ - int err; - struct rtc_device *rtc = to_rtc_device(dev); - - mutex_lock(&alarm_setrtc_mutex); - - if (alarm_rtc_dev) { - err = -EBUSY; - goto err1; - } - - alarm_platform_dev = - platform_device_register_simple("alarm", -1, NULL, 0); - if (IS_ERR(alarm_platform_dev)) { - err = PTR_ERR(alarm_platform_dev); - goto err2; - } - err = rtc_irq_register(rtc, &alarm_rtc_task); - if (err) - goto err3; - alarm_rtc_dev = rtc; - pr_alarm(INIT_STATUS, "using rtc device, %s, for alarms", rtc->name); - mutex_unlock(&alarm_setrtc_mutex); - - return 0; - -err3: - platform_device_unregister(alarm_platform_dev); -err2: -err1: - mutex_unlock(&alarm_setrtc_mutex); - return err; -} - -static void rtc_alarm_remove_device(struct device *dev, - struct class_interface *class_intf) -{ - if (dev == &alarm_rtc_dev->dev) { - pr_alarm(INIT_STATUS, "lost rtc device for alarms"); - rtc_irq_unregister(alarm_rtc_dev, &alarm_rtc_task); - platform_device_unregister(alarm_platform_dev); - alarm_rtc_dev = NULL; - } -} - -static struct class_interface rtc_alarm_interface = { - .add_dev = &rtc_alarm_add_device, - .remove_dev = &rtc_alarm_remove_device, -}; - -static struct platform_driver alarm_driver = { - .suspend = alarm_suspend, - .resume = alarm_resume, - .driver = { - .name = "alarm" - } -}; - -static int __init alarm_late_init(void) -{ - unsigned long flags; - struct timespec tmp_time, system_time; - - /* this needs to run after the rtc is read at boot */ - spin_lock_irqsave(&alarm_slock, flags); - /* We read the current rtc and system time so we can later calulate - * elasped realtime to be (boot_systemtime + rtc - boot_rtc) == - * (rtc - (boot_rtc - boot_systemtime)) - */ - getnstimeofday(&tmp_time); - ktime_get_ts(&system_time); - alarms[ANDROID_ALARM_ELAPSED_REALTIME_WAKEUP].delta = - alarms[ANDROID_ALARM_ELAPSED_REALTIME].delta = - timespec_to_ktime(timespec_sub(tmp_time, system_time)); - - spin_unlock_irqrestore(&alarm_slock, flags); - return 0; -} - -static int __init alarm_driver_init(void) -{ - int err; - int i; - - for (i = 0; i < ANDROID_ALARM_SYSTEMTIME; i++) { - hrtimer_init(&alarms[i].timer, - CLOCK_REALTIME, HRTIMER_MODE_ABS); - alarms[i].timer.function = alarm_timer_triggered; - } - hrtimer_init(&alarms[ANDROID_ALARM_SYSTEMTIME].timer, - CLOCK_MONOTONIC, HRTIMER_MODE_ABS); - alarms[ANDROID_ALARM_SYSTEMTIME].timer.function = alarm_timer_triggered; - err = platform_driver_register(&alarm_driver); - if (err < 0) - goto err1; - wake_lock_init(&alarm_rtc_wake_lock, WAKE_LOCK_SUSPEND, "alarm_rtc"); - rtc_alarm_interface.class = rtc_class; - err = class_interface_register(&rtc_alarm_interface); - if (err < 0) - goto err2; - - return 0; - -err2: - wake_lock_destroy(&alarm_rtc_wake_lock); - platform_driver_unregister(&alarm_driver); -err1: - return err; -} - -static void __exit alarm_exit(void) -{ - class_interface_unregister(&rtc_alarm_interface); - wake_lock_destroy(&alarm_rtc_wake_lock); - platform_driver_unregister(&alarm_driver); -} - -late_initcall(alarm_late_init); -module_init(alarm_driver_init); -module_exit(alarm_exit); - diff --git a/drivers/staging/android/android_alarm.h b/drivers/staging/android/android_alarm.h index 6eecbde2ef6f..d0cafd637199 100644 --- a/drivers/staging/android/android_alarm.h +++ b/drivers/staging/android/android_alarm.h @@ -33,65 +33,6 @@ enum android_alarm_type { /* ANDROID_ALARM_TIME_CHANGE = 16 */ }; -#ifdef __KERNEL__ - -#include <linux/ktime.h> -#include <linux/rbtree.h> - -/* - * The alarm interface is similar to the hrtimer interface but adds support - * for wakeup from suspend. It also adds an elapsed realtime clock that can - * be used for periodic timers that need to keep runing while the system is - * suspended and not be disrupted when the wall time is set. - */ - -/** - * struct alarm - the basic alarm structure - * @node: red black tree node for time ordered insertion - * @type: alarm type. rtc/elapsed-realtime/systemtime, wakeup/non-wakeup. - * @softexpires: the absolute earliest expiry time of the alarm. - * @expires: the absolute expiry time. - * @function: alarm expiry callback function - * - * The alarm structure must be initialized by alarm_init() - * - */ - -struct android_alarm { - struct rb_node node; - enum android_alarm_type type; - ktime_t softexpires; - ktime_t expires; - void (*function)(struct android_alarm *); -}; - -void android_alarm_init(struct android_alarm *alarm, - enum android_alarm_type type, void (*function)(struct android_alarm *)); -void android_alarm_start_range(struct android_alarm *alarm, ktime_t start, - ktime_t end); -int android_alarm_try_to_cancel(struct android_alarm *alarm); -int android_alarm_cancel(struct android_alarm *alarm); -ktime_t alarm_get_elapsed_realtime(void); - -/* set rtc while preserving elapsed realtime */ -int android_alarm_set_rtc(const struct timespec ts); - -#ifdef CONFIG_ANDROID_ALARM_OLDDRV_COMPAT -/* - * Some older drivers depend on the old API, - * so provide compatability macros for now. - */ -#define alarm android_alarm -#define alarm_init(x, y, z) android_alarm_init(x, y, z) -#define alarm_start_range(x, y, z) android_alarm_start_range(x, y, z) -#define alarm_try_to_cancel(x) android_alarm_try_to_cancel(x) -#define alarm_cancel(x) android_alarm_cancel(x) -#define alarm_set_rtc(x) android_alarm_set_rtc(x) -#endif - - -#endif - enum android_alarm_return_flags { ANDROID_ALARM_RTC_WAKEUP_MASK = 1U << ANDROID_ALARM_RTC_WAKEUP, ANDROID_ALARM_RTC_MASK = 1U << ANDROID_ALARM_RTC, diff --git a/drivers/staging/android/binder.h b/drivers/staging/android/binder.h index 25ab6f2759e9..2f7d195d8b15 100644 --- a/drivers/staging/android/binder.h +++ b/drivers/staging/android/binder.h @@ -53,17 +53,17 @@ struct flat_binder_object { /* 8 bytes of data. */ union { - void *binder; /* local object */ + void __user *binder; /* local object */ signed long handle; /* remote object */ }; /* extra data associated with local object */ - void *cookie; + void __user *cookie; }; /* * On 64-bit platforms where user code may run in 32-bits the driver must - * translate the buffer (and local binder) addresses apropriately. + * translate the buffer (and local binder) addresses appropriately. */ struct binder_write_read { @@ -139,9 +139,9 @@ struct binder_transaction_data { union { struct { /* transaction data */ - const void *buffer; + const void __user *buffer; /* offsets from buffer to flat_binder_object structs */ - const void *offsets; + const void __user *offsets; } ptr; uint8_t buf[8]; } data; diff --git a/drivers/staging/android/logger.c b/drivers/staging/android/logger.c index ea69b6a77dac..b2e71c6fd175 100644 --- a/drivers/staging/android/logger.c +++ b/drivers/staging/android/logger.c @@ -25,6 +25,7 @@ #include <linux/poll.h> #include <linux/slab.h> #include <linux/time.h> +#include <linux/vmalloc.h> #include "logger.h" #include <asm/ioctls.h> @@ -45,8 +46,12 @@ struct logger_log { size_t w_off; /* current write head offset */ size_t head; /* new readers start here */ size_t size; /* size of the log */ + struct list_head logs; /* list of log channels (myself)*/ }; +static LIST_HEAD(log_list); + + /* * struct logger_reader - a logging device open for reading * @@ -60,9 +65,9 @@ struct logger_reader { }; /* logger_offset - returns index 'n' into the log via (optimized) modulus */ -size_t logger_offset(struct logger_log *log, size_t n) +static size_t logger_offset(struct logger_log *log, size_t n) { - return n & (log->size-1); + return n & (log->size - 1); } @@ -348,7 +353,7 @@ static ssize_t do_write_log_from_user(struct logger_log *log, * writev(), and aio_write(). Writes are our fast path, and we try to optimize * them above all else. */ -ssize_t logger_aio_write(struct kiocb *iocb, const struct iovec *iov, +static ssize_t logger_aio_write(struct kiocb *iocb, const struct iovec *iov, unsigned long nr_segs, loff_t ppos) { struct logger_log *log = file_get_log(iocb->ki_filp); @@ -408,7 +413,15 @@ ssize_t logger_aio_write(struct kiocb *iocb, const struct iovec *iov, return ret; } -static struct logger_log *get_log_from_minor(int); +static struct logger_log *get_log_from_minor(int minor) +{ + struct logger_log *log; + + list_for_each_entry(log, &log_list, logs) + if (log->misc.minor == minor) + return log; + return NULL; +} /* * logger_open - the log's open() file operation @@ -565,80 +578,84 @@ static const struct file_operations logger_fops = { }; /* - * Defines a log structure with name 'NAME' and a size of 'SIZE' bytes, which - * must be a power of two, greater than LOGGER_ENTRY_MAX_LEN, and less than - * LONG_MAX minus LOGGER_ENTRY_MAX_LEN. + * Log size must be a power of two, greater than LOGGER_ENTRY_MAX_LEN, + * and less than LONG_MAX minus LOGGER_ENTRY_MAX_LEN. */ -#define DEFINE_LOGGER_DEVICE(VAR, NAME, SIZE) \ -static unsigned char _buf_ ## VAR[SIZE]; \ -static struct logger_log VAR = { \ - .buffer = _buf_ ## VAR, \ - .misc = { \ - .minor = MISC_DYNAMIC_MINOR, \ - .name = NAME, \ - .fops = &logger_fops, \ - .parent = NULL, \ - }, \ - .wq = __WAIT_QUEUE_HEAD_INITIALIZER(VAR .wq), \ - .readers = LIST_HEAD_INIT(VAR .readers), \ - .mutex = __MUTEX_INITIALIZER(VAR .mutex), \ - .w_off = 0, \ - .head = 0, \ - .size = SIZE, \ -}; +static int __init create_log(char *log_name, int size) +{ + int ret = 0; + struct logger_log *log; + unsigned char *buffer; -DEFINE_LOGGER_DEVICE(log_main, LOGGER_LOG_MAIN, 256*1024) -DEFINE_LOGGER_DEVICE(log_events, LOGGER_LOG_EVENTS, 256*1024) -DEFINE_LOGGER_DEVICE(log_radio, LOGGER_LOG_RADIO, 256*1024) -DEFINE_LOGGER_DEVICE(log_system, LOGGER_LOG_SYSTEM, 256*1024) + buffer = vmalloc(size); + if (buffer == NULL) + return -ENOMEM; -static struct logger_log *get_log_from_minor(int minor) -{ - if (log_main.misc.minor == minor) - return &log_main; - if (log_events.misc.minor == minor) - return &log_events; - if (log_radio.misc.minor == minor) - return &log_radio; - if (log_system.misc.minor == minor) - return &log_system; - return NULL; -} + log = kzalloc(sizeof(struct logger_log), GFP_KERNEL); + if (log == NULL) { + ret = -ENOMEM; + goto out_free_buffer; + } + log->buffer = buffer; -static int __init init_log(struct logger_log *log) -{ - int ret; + log->misc.minor = MISC_DYNAMIC_MINOR; + log->misc.name = kstrdup(log_name, GFP_KERNEL); + if (log->misc.name == NULL) { + ret = -ENOMEM; + goto out_free_log; + } + + log->misc.fops = &logger_fops; + log->misc.parent = NULL; + init_waitqueue_head(&log->wq); + INIT_LIST_HEAD(&log->readers); + mutex_init(&log->mutex); + log->w_off = 0; + log->head = 0; + log->size = size; + + INIT_LIST_HEAD(&log->logs); + list_add_tail(&log->logs, &log_list); + + /* finally, initialize the misc device for this log */ ret = misc_register(&log->misc); if (unlikely(ret)) { printk(KERN_ERR "logger: failed to register misc " "device for log '%s'!\n", log->misc.name); - return ret; + goto out_free_log; } printk(KERN_INFO "logger: created %luK log '%s'\n", (unsigned long) log->size >> 10, log->misc.name); return 0; + +out_free_log: + kfree(log); + +out_free_buffer: + vfree(buffer); + return ret; } static int __init logger_init(void) { int ret; - ret = init_log(&log_main); + ret = create_log(LOGGER_LOG_MAIN, 256*1024); if (unlikely(ret)) goto out; - ret = init_log(&log_events); + ret = create_log(LOGGER_LOG_EVENTS, 256*1024); if (unlikely(ret)) goto out; - ret = init_log(&log_radio); + ret = create_log(LOGGER_LOG_RADIO, 256*1024); if (unlikely(ret)) goto out; - ret = init_log(&log_system); + ret = create_log(LOGGER_LOG_SYSTEM, 256*1024); if (unlikely(ret)) goto out; diff --git a/drivers/staging/android/persistent_ram.c b/drivers/staging/android/persistent_ram.c deleted file mode 100644 index 8d8c1e33e0ff..000000000000 --- a/drivers/staging/android/persistent_ram.c +++ /dev/null @@ -1,473 +0,0 @@ -/* - * Copyright (C) 2012 Google, Inc. - * - * This software is licensed under the terms of the GNU General Public - * License version 2, as published by the Free Software Foundation, and - * may be copied, distributed, and modified under those terms. - * - * 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/device.h> -#include <linux/err.h> -#include <linux/errno.h> -#include <linux/kernel.h> -#include <linux/init.h> -#include <linux/io.h> -#include <linux/list.h> -#include <linux/memblock.h> -#include <linux/rslib.h> -#include <linux/slab.h> -#include <linux/vmalloc.h> -#include "persistent_ram.h" - -struct persistent_ram_buffer { - uint32_t sig; - atomic_t start; - atomic_t size; - uint8_t data[0]; -}; - -#define PERSISTENT_RAM_SIG (0x43474244) /* DBGC */ - -static __initdata LIST_HEAD(persistent_ram_list); - -static inline size_t buffer_size(struct persistent_ram_zone *prz) -{ - return atomic_read(&prz->buffer->size); -} - -static inline size_t buffer_start(struct persistent_ram_zone *prz) -{ - return atomic_read(&prz->buffer->start); -} - -/* increase and wrap the start pointer, returning the old value */ -static inline size_t buffer_start_add(struct persistent_ram_zone *prz, size_t a) -{ - int old; - int new; - - do { - old = atomic_read(&prz->buffer->start); - new = old + a; - while (unlikely(new > prz->buffer_size)) - new -= prz->buffer_size; - } while (atomic_cmpxchg(&prz->buffer->start, old, new) != old); - - return old; -} - -/* increase the size counter until it hits the max size */ -static inline void buffer_size_add(struct persistent_ram_zone *prz, size_t a) -{ - size_t old; - size_t new; - - if (atomic_read(&prz->buffer->size) == prz->buffer_size) - return; - - do { - old = atomic_read(&prz->buffer->size); - new = old + a; - if (new > prz->buffer_size) - new = prz->buffer_size; - } while (atomic_cmpxchg(&prz->buffer->size, old, new) != old); -} - -/* increase the size counter, retuning an error if it hits the max size */ -static inline ssize_t buffer_size_add_clamp(struct persistent_ram_zone *prz, - size_t a) -{ - size_t old; - size_t new; - - do { - old = atomic_read(&prz->buffer->size); - new = old + a; - if (new > prz->buffer_size) - return -ENOMEM; - } while (atomic_cmpxchg(&prz->buffer->size, old, new) != old); - - return 0; -} - -static void notrace persistent_ram_encode_rs8(struct persistent_ram_zone *prz, - uint8_t *data, size_t len, uint8_t *ecc) -{ - int i; - uint16_t par[prz->ecc_size]; - - /* Initialize the parity buffer */ - memset(par, 0, sizeof(par)); - encode_rs8(prz->rs_decoder, data, len, par, 0); - for (i = 0; i < prz->ecc_size; i++) - ecc[i] = par[i]; -} - -static int persistent_ram_decode_rs8(struct persistent_ram_zone *prz, - void *data, size_t len, uint8_t *ecc) -{ - int i; - uint16_t par[prz->ecc_size]; - - for (i = 0; i < prz->ecc_size; i++) - par[i] = ecc[i]; - return decode_rs8(prz->rs_decoder, data, par, len, - NULL, 0, NULL, 0, NULL); -} - -static void notrace persistent_ram_update_ecc(struct persistent_ram_zone *prz, - unsigned int start, unsigned int count) -{ - struct persistent_ram_buffer *buffer = prz->buffer; - uint8_t *buffer_end = buffer->data + prz->buffer_size; - uint8_t *block; - uint8_t *par; - int ecc_block_size = prz->ecc_block_size; - int ecc_size = prz->ecc_size; - int size = prz->ecc_block_size; - - if (!prz->ecc) - return; - - block = buffer->data + (start & ~(ecc_block_size - 1)); - par = prz->par_buffer + (start / ecc_block_size) * prz->ecc_size; - - do { - if (block + ecc_block_size > buffer_end) - size = buffer_end - block; - persistent_ram_encode_rs8(prz, block, size, par); - block += ecc_block_size; - par += ecc_size; - } while (block < buffer->data + start + count); -} - -static void persistent_ram_update_header_ecc(struct persistent_ram_zone *prz) -{ - struct persistent_ram_buffer *buffer = prz->buffer; - - if (!prz->ecc) - return; - - persistent_ram_encode_rs8(prz, (uint8_t *)buffer, sizeof(*buffer), - prz->par_header); -} - -static void persistent_ram_ecc_old(struct persistent_ram_zone *prz) -{ - struct persistent_ram_buffer *buffer = prz->buffer; - uint8_t *block; - uint8_t *par; - - if (!prz->ecc) - return; - - block = buffer->data; - par = prz->par_buffer; - while (block < buffer->data + buffer_size(prz)) { - int numerr; - int size = prz->ecc_block_size; - if (block + size > buffer->data + prz->buffer_size) - size = buffer->data + prz->buffer_size - block; - numerr = persistent_ram_decode_rs8(prz, block, size, par); - if (numerr > 0) { - pr_devel("persistent_ram: error in block %p, %d\n", - block, numerr); - prz->corrected_bytes += numerr; - } else if (numerr < 0) { - pr_devel("persistent_ram: uncorrectable error in block %p\n", - block); - prz->bad_blocks++; - } - block += prz->ecc_block_size; - par += prz->ecc_size; - } -} - -static int persistent_ram_init_ecc(struct persistent_ram_zone *prz, - size_t buffer_size) -{ - int numerr; - struct persistent_ram_buffer *buffer = prz->buffer; - int ecc_blocks; - - if (!prz->ecc) - return 0; - - prz->ecc_block_size = 128; - prz->ecc_size = 16; - prz->ecc_symsize = 8; - prz->ecc_poly = 0x11d; - - ecc_blocks = DIV_ROUND_UP(prz->buffer_size, prz->ecc_block_size); - prz->buffer_size -= (ecc_blocks + 1) * prz->ecc_size; - - if (prz->buffer_size > buffer_size) { - pr_err("persistent_ram: invalid size %zu, non-ecc datasize %zu\n", - buffer_size, prz->buffer_size); - return -EINVAL; - } - - prz->par_buffer = buffer->data + prz->buffer_size; - prz->par_header = prz->par_buffer + ecc_blocks * prz->ecc_size; - - /* - * first consecutive root is 0 - * primitive element to generate roots = 1 - */ - prz->rs_decoder = init_rs(prz->ecc_symsize, prz->ecc_poly, 0, 1, - prz->ecc_size); - if (prz->rs_decoder == NULL) { - pr_info("persistent_ram: init_rs failed\n"); - return -EINVAL; - } - - prz->corrected_bytes = 0; - prz->bad_blocks = 0; - - numerr = persistent_ram_decode_rs8(prz, buffer, sizeof(*buffer), - prz->par_header); - if (numerr > 0) { - pr_info("persistent_ram: error in header, %d\n", numerr); - prz->corrected_bytes += numerr; - } else if (numerr < 0) { - pr_info("persistent_ram: uncorrectable error in header\n"); - prz->bad_blocks++; - } - - return 0; -} - -ssize_t persistent_ram_ecc_string(struct persistent_ram_zone *prz, - char *str, size_t len) -{ - ssize_t ret; - - if (prz->corrected_bytes || prz->bad_blocks) - ret = snprintf(str, len, "" - "\n%d Corrected bytes, %d unrecoverable blocks\n", - prz->corrected_bytes, prz->bad_blocks); - else - ret = snprintf(str, len, "\nNo errors detected\n"); - - return ret; -} - -static void notrace persistent_ram_update(struct persistent_ram_zone *prz, - const void *s, unsigned int start, unsigned int count) -{ - struct persistent_ram_buffer *buffer = prz->buffer; - memcpy(buffer->data + start, s, count); - persistent_ram_update_ecc(prz, start, count); -} - -static void __init -persistent_ram_save_old(struct persistent_ram_zone *prz) -{ - struct persistent_ram_buffer *buffer = prz->buffer; - size_t size = buffer_size(prz); - size_t start = buffer_start(prz); - char *dest; - - persistent_ram_ecc_old(prz); - - dest = kmalloc(size, GFP_KERNEL); - if (dest == NULL) { - pr_err("persistent_ram: failed to allocate buffer\n"); - return; - } - - prz->old_log = dest; - prz->old_log_size = size; - memcpy(prz->old_log, &buffer->data[start], size - start); - memcpy(prz->old_log + size - start, &buffer->data[0], start); -} - -int notrace persistent_ram_write(struct persistent_ram_zone *prz, - const void *s, unsigned int count) -{ - int rem; - int c = count; - size_t start; - - if (unlikely(c > prz->buffer_size)) { - s += c - prz->buffer_size; - c = prz->buffer_size; - } - - buffer_size_add_clamp(prz, c); - - start = buffer_start_add(prz, c); - - rem = prz->buffer_size - start; - if (unlikely(rem < c)) { - persistent_ram_update(prz, s, start, rem); - s += rem; - c -= rem; - start = 0; - } - persistent_ram_update(prz, s, start, c); - - persistent_ram_update_header_ecc(prz); - - return count; -} - -size_t persistent_ram_old_size(struct persistent_ram_zone *prz) -{ - return prz->old_log_size; -} - -void *persistent_ram_old(struct persistent_ram_zone *prz) -{ - return prz->old_log; -} - -void persistent_ram_free_old(struct persistent_ram_zone *prz) -{ - kfree(prz->old_log); - prz->old_log = NULL; - prz->old_log_size = 0; -} - -static int persistent_ram_buffer_map(phys_addr_t start, phys_addr_t size, - struct persistent_ram_zone *prz) -{ - struct page **pages; - phys_addr_t page_start; - unsigned int page_count; - pgprot_t prot; - unsigned int i; - - page_start = start - offset_in_page(start); - page_count = DIV_ROUND_UP(size + offset_in_page(start), PAGE_SIZE); - - prot = pgprot_noncached(PAGE_KERNEL); - - pages = kmalloc(sizeof(struct page *) * page_count, GFP_KERNEL); - if (!pages) { - pr_err("%s: Failed to allocate array for %u pages\n", __func__, - page_count); - return -ENOMEM; - } - - for (i = 0; i < page_count; i++) { - phys_addr_t addr = page_start + i * PAGE_SIZE; - pages[i] = pfn_to_page(addr >> PAGE_SHIFT); - } - prz->vaddr = vmap(pages, page_count, VM_MAP, prot); - kfree(pages); - if (!prz->vaddr) { - pr_err("%s: Failed to map %u pages\n", __func__, page_count); - return -ENOMEM; - } - - prz->buffer = prz->vaddr + offset_in_page(start); - prz->buffer_size = size - sizeof(struct persistent_ram_buffer); - - return 0; -} - -static int __init persistent_ram_buffer_init(const char *name, - struct persistent_ram_zone *prz) -{ - int i; - struct persistent_ram *ram; - struct persistent_ram_descriptor *desc; - phys_addr_t start; - - list_for_each_entry(ram, &persistent_ram_list, node) { - start = ram->start; - for (i = 0; i < ram->num_descs; i++) { - desc = &ram->descs[i]; - if (!strcmp(desc->name, name)) - return persistent_ram_buffer_map(start, - desc->size, prz); - start += desc->size; - } - } - - return -EINVAL; -} - -static __init -struct persistent_ram_zone *__persistent_ram_init(struct device *dev, bool ecc) -{ - struct persistent_ram_zone *prz; - int ret = -ENOMEM; - - prz = kzalloc(sizeof(struct persistent_ram_zone), GFP_KERNEL); - if (!prz) { - pr_err("persistent_ram: failed to allocate persistent ram zone\n"); - goto err; - } - - INIT_LIST_HEAD(&prz->node); - - ret = persistent_ram_buffer_init(dev_name(dev), prz); - if (ret) { - pr_err("persistent_ram: failed to initialize buffer\n"); - goto err; - } - - prz->ecc = ecc; - ret = persistent_ram_init_ecc(prz, prz->buffer_size); - if (ret) - goto err; - - if (prz->buffer->sig == PERSISTENT_RAM_SIG) { - if (buffer_size(prz) > prz->buffer_size || - buffer_start(prz) > buffer_size(prz)) - pr_info("persistent_ram: found existing invalid buffer," - " size %ld, start %ld\n", - buffer_size(prz), buffer_start(prz)); - else { - pr_info("persistent_ram: found existing buffer," - " size %ld, start %ld\n", - buffer_size(prz), buffer_start(prz)); - persistent_ram_save_old(prz); - } - } else { - pr_info("persistent_ram: no valid data in buffer" - " (sig = 0x%08x)\n", prz->buffer->sig); - } - - prz->buffer->sig = PERSISTENT_RAM_SIG; - atomic_set(&prz->buffer->start, 0); - atomic_set(&prz->buffer->size, 0); - - return prz; -err: - kfree(prz); - return ERR_PTR(ret); -} - -struct persistent_ram_zone * __init -persistent_ram_init_ringbuffer(struct device *dev, bool ecc) -{ - return __persistent_ram_init(dev, ecc); -} - -int __init persistent_ram_early_init(struct persistent_ram *ram) -{ - int ret; - - ret = memblock_reserve(ram->start, ram->size); - if (ret) { - pr_err("Failed to reserve persistent memory from %08lx-%08lx\n", - (long)ram->start, (long)(ram->start + ram->size - 1)); - return ret; - } - - list_add_tail(&ram->node, &persistent_ram_list); - - pr_info("Initialized persistent memory from %08lx-%08lx\n", - (long)ram->start, (long)(ram->start + ram->size - 1)); - - return 0; -} diff --git a/drivers/staging/android/persistent_ram.h b/drivers/staging/android/persistent_ram.h deleted file mode 100644 index f41e2086c645..000000000000 --- a/drivers/staging/android/persistent_ram.h +++ /dev/null @@ -1,78 +0,0 @@ -/* - * Copyright (C) 2011 Google, Inc. - * - * This software is licensed under the terms of the GNU General Public - * License version 2, as published by the Free Software Foundation, and - * may be copied, distributed, and modified under those terms. - * - * 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. - * - */ - -#ifndef __LINUX_PERSISTENT_RAM_H__ -#define __LINUX_PERSISTENT_RAM_H__ - -#include <linux/device.h> -#include <linux/kernel.h> -#include <linux/list.h> -#include <linux/types.h> - -struct persistent_ram_buffer; - -struct persistent_ram_descriptor { - const char *name; - phys_addr_t size; -}; - -struct persistent_ram { - phys_addr_t start; - phys_addr_t size; - - int num_descs; - struct persistent_ram_descriptor *descs; - - struct list_head node; -}; - -struct persistent_ram_zone { - struct list_head node; - void *vaddr; - struct persistent_ram_buffer *buffer; - size_t buffer_size; - - /* ECC correction */ - bool ecc; - char *par_buffer; - char *par_header; - struct rs_control *rs_decoder; - int corrected_bytes; - int bad_blocks; - int ecc_block_size; - int ecc_size; - int ecc_symsize; - int ecc_poly; - - char *old_log; - size_t old_log_size; - size_t old_log_footer_size; - bool early; -}; - -int persistent_ram_early_init(struct persistent_ram *ram); - -struct persistent_ram_zone *persistent_ram_init_ringbuffer(struct device *dev, - bool ecc); - -int persistent_ram_write(struct persistent_ram_zone *prz, const void *s, - unsigned int count); - -size_t persistent_ram_old_size(struct persistent_ram_zone *prz); -void *persistent_ram_old(struct persistent_ram_zone *prz); -void persistent_ram_free_old(struct persistent_ram_zone *prz); -ssize_t persistent_ram_ecc_string(struct persistent_ram_zone *prz, - char *str, size_t len); - -#endif diff --git a/drivers/staging/android/ram_console.c b/drivers/staging/android/ram_console.c index ce140ffc54ea..82323bb1d1a3 100644 --- a/drivers/staging/android/ram_console.c +++ b/drivers/staging/android/ram_console.c @@ -21,7 +21,7 @@ #include <linux/string.h> #include <linux/uaccess.h> #include <linux/io.h> -#include "persistent_ram.h" +#include <linux/pstore_ram.h> #include "ram_console.h" static struct persistent_ram_zone *ram_console_zone; diff --git a/drivers/staging/android/timed_output.c b/drivers/staging/android/timed_output.c index f373422308e0..38d930cadad3 100644 --- a/drivers/staging/android/timed_output.c +++ b/drivers/staging/android/timed_output.c @@ -99,6 +99,7 @@ EXPORT_SYMBOL_GPL(timed_output_dev_register); void timed_output_dev_unregister(struct timed_output_dev *tdev) { + tdev->enable(tdev, 0); device_remove_file(tdev->dev, &dev_attr_enable); device_destroy(timed_output_class, MKDEV(0, tdev->index)); dev_set_drvdata(tdev->dev, NULL); |