From b299eb5cde1a91706c450804006c6559b0826df8 Mon Sep 17 00:00:00 2001 From: Durgadoss R Date: Thu, 3 Mar 2011 04:30:13 +0530 Subject: ACPI:Fix goto flows in thermal-sys This patch fixes two minor bugs in thermal_sys: (a) The flow of goto's in thermal_hwmon_add_sysfs. (b) Remove the temp*_crit only if there is a get_crit_temp defined, in thermal_remove_hwmon_sysfs. Signed-off-by: Durgadoss R Signed-off-by: Len Brown diff --git a/drivers/thermal/thermal_sys.c b/drivers/thermal/thermal_sys.c index 713b7ea..0b1c82a 100644 --- a/drivers/thermal/thermal_sys.c +++ b/drivers/thermal/thermal_sys.c @@ -499,7 +499,7 @@ thermal_add_hwmon_sysfs(struct thermal_zone_device *tz) dev_set_drvdata(hwmon->device, hwmon); result = device_create_file(hwmon->device, &dev_attr_name); if (result) - goto unregister_hwmon_device; + goto free_mem; register_sys_interface: tz->hwmon = hwmon; @@ -513,7 +513,7 @@ thermal_add_hwmon_sysfs(struct thermal_zone_device *tz) sysfs_attr_init(&tz->temp_input.attr.attr); result = device_create_file(hwmon->device, &tz->temp_input.attr); if (result) - goto unregister_hwmon_device; + goto unregister_name; if (tz->ops->get_crit_temp) { unsigned long temperature; @@ -527,7 +527,7 @@ thermal_add_hwmon_sysfs(struct thermal_zone_device *tz) result = device_create_file(hwmon->device, &tz->temp_crit.attr); if (result) - goto unregister_hwmon_device; + goto unregister_input; } } @@ -539,9 +539,9 @@ thermal_add_hwmon_sysfs(struct thermal_zone_device *tz) return 0; - unregister_hwmon_device: - device_remove_file(hwmon->device, &tz->temp_crit.attr); + unregister_input: device_remove_file(hwmon->device, &tz->temp_input.attr); + unregister_name: if (new_hwmon_device) { device_remove_file(hwmon->device, &dev_attr_name); hwmon_device_unregister(hwmon->device); @@ -560,7 +560,8 @@ thermal_remove_hwmon_sysfs(struct thermal_zone_device *tz) tz->hwmon = NULL; device_remove_file(hwmon->device, &tz->temp_input.attr); - device_remove_file(hwmon->device, &tz->temp_crit.attr); + if (tz->ops->get_crit_temp) + device_remove_file(hwmon->device, &tz->temp_crit.attr); mutex_lock(&thermal_list_lock); list_del(&tz->hwmon_node); -- cgit v0.10.2 From 9f63b88bd7a1ac1afbb4358772a39abaeddbdd13 Mon Sep 17 00:00:00 2001 From: Lin Ming Date: Wed, 23 Mar 2011 17:26:34 +0800 Subject: ACPI: osl, add acpi_os_create_lock interface Signed-off-by: Lin Ming Signed-off-by: Len Brown diff --git a/drivers/acpi/osl.c b/drivers/acpi/osl.c index c90c76a..cf750a7 100644 --- a/drivers/acpi/osl.c +++ b/drivers/acpi/osl.c @@ -883,14 +883,6 @@ void acpi_os_wait_events_complete(void *context) EXPORT_SYMBOL(acpi_os_wait_events_complete); -/* - * Deallocate the memory for a spinlock. - */ -void acpi_os_delete_lock(acpi_spinlock handle) -{ - return; -} - acpi_status acpi_os_create_semaphore(u32 max_units, u32 initial_units, acpi_handle * handle) { @@ -1322,6 +1314,31 @@ int acpi_resources_are_enforced(void) EXPORT_SYMBOL(acpi_resources_are_enforced); /* + * Create and initialize a spinlock. + */ +acpi_status +acpi_os_create_lock(acpi_spinlock *out_handle) +{ + spinlock_t *lock; + + lock = ACPI_ALLOCATE(sizeof(spinlock_t)); + if (!lock) + return AE_NO_MEMORY; + spin_lock_init(lock); + *out_handle = lock; + + return AE_OK; +} + +/* + * Deallocate the memory for a spinlock. + */ +void acpi_os_delete_lock(acpi_spinlock handle) +{ + ACPI_FREE(handle); +} + +/* * Acquire a spinlock. * * handle is a pointer to the spinlock_t. diff --git a/include/acpi/acpiosxf.h b/include/acpi/acpiosxf.h index a3252a5..a756bc8 100644 --- a/include/acpi/acpiosxf.h +++ b/include/acpi/acpiosxf.h @@ -98,6 +98,9 @@ acpi_os_table_override(struct acpi_table_header *existing_table, /* * Spinlock primitives */ +acpi_status +acpi_os_create_lock(acpi_spinlock *out_handle); + void acpi_os_delete_lock(acpi_spinlock handle); acpi_cpu_flags acpi_os_acquire_lock(acpi_spinlock handle); -- cgit v0.10.2 From 3854c8e32f46ffa6ee0bf2eb01137f5a48b2754f Mon Sep 17 00:00:00 2001 From: Lin Ming Date: Wed, 23 Mar 2011 17:26:35 +0800 Subject: ACPICA: Use acpi_os_create_lock interface Replace spin_lock_init with acpi_os_create_lock. Signed-off-by: Lin Ming Signed-off-by: Len Brown diff --git a/drivers/acpi/acpica/acglobal.h b/drivers/acpi/acpica/acglobal.h index d69750b..6d512fc 100644 --- a/drivers/acpi/acpica/acglobal.h +++ b/drivers/acpi/acpica/acglobal.h @@ -226,12 +226,9 @@ ACPI_EXTERN u8 acpi_gbl_global_lock_present; * Spinlocks are used for interfaces that can be possibly called at * interrupt level */ -ACPI_EXTERN spinlock_t _acpi_gbl_gpe_lock; /* For GPE data structs and registers */ -ACPI_EXTERN spinlock_t _acpi_gbl_hardware_lock; /* For ACPI H/W except GPE registers */ -ACPI_EXTERN spinlock_t _acpi_ev_global_lock_pending_lock; /* For global lock */ -#define acpi_gbl_gpe_lock &_acpi_gbl_gpe_lock -#define acpi_gbl_hardware_lock &_acpi_gbl_hardware_lock -#define acpi_ev_global_lock_pending_lock &_acpi_ev_global_lock_pending_lock +ACPI_EXTERN acpi_spinlock acpi_gbl_gpe_lock; /* For GPE data structs and registers */ +ACPI_EXTERN acpi_spinlock acpi_gbl_hardware_lock; /* For ACPI H/W except GPE registers */ +ACPI_EXTERN acpi_spinlock acpi_ev_global_lock_pending_lock; /* For global lock */ /***************************************************************************** * diff --git a/drivers/acpi/acpica/utmutex.c b/drivers/acpi/acpica/utmutex.c index a946c68..519d4ee 100644 --- a/drivers/acpi/acpica/utmutex.c +++ b/drivers/acpi/acpica/utmutex.c @@ -83,9 +83,20 @@ acpi_status acpi_ut_mutex_initialize(void) /* Create the spinlocks for use at interrupt level */ - spin_lock_init(acpi_gbl_gpe_lock); - spin_lock_init(acpi_gbl_hardware_lock); - spin_lock_init(acpi_ev_global_lock_pending_lock); + status = acpi_os_create_lock (&acpi_gbl_gpe_lock); + if (ACPI_FAILURE (status)) { + return_ACPI_STATUS (status); + } + + status = acpi_os_create_lock (&acpi_gbl_hardware_lock); + if (ACPI_FAILURE (status)) { + return_ACPI_STATUS (status); + } + + status = acpi_os_create_lock (&acpi_ev_global_lock_pending_lock); + if (ACPI_FAILURE (status)) { + return_ACPI_STATUS (status); + } /* Mutex for _OSI support */ status = acpi_os_create_mutex(&acpi_gbl_osi_mutex); -- cgit v0.10.2 From 749c27639b95c5c4a8185e02a4efb189034944ed Mon Sep 17 00:00:00 2001 From: Lin Ming Date: Wed, 23 Mar 2011 17:26:36 +0800 Subject: ACPICA: Fix code divergence of global lock handling Commit 9cd0314(ACPI / ACPICA: Fix global lock acquisition) was backported into ACPICA code base, and some divergence was introduced. This patch fixed it, - rename acpi_ev_global_lock_pending/acpi_ev_global_lock_pending_lock to acpi_gbl_global_lock_pending/acpi_gbl_global_lock_pending_lock. - move the initialization of acpi_gbl_global_lock_pending_lock from acpi_ut_mutex_initialize to acpi_ev_init_global_lock_handler. Signed-off-by: Lin Ming Reviewed-by: Rafael J. Wysocki Signed-off-by: Len Brown diff --git a/drivers/acpi/acpica/acglobal.h b/drivers/acpi/acpica/acglobal.h index 6d512fc..73863d86 100644 --- a/drivers/acpi/acpica/acglobal.h +++ b/drivers/acpi/acpica/acglobal.h @@ -214,13 +214,16 @@ ACPI_EXTERN struct acpi_mutex_info acpi_gbl_mutex_info[ACPI_NUM_MUTEX]; /* * Global lock mutex is an actual AML mutex object - * Global lock semaphore works in conjunction with the HW global lock + * Global lock semaphore works in conjunction with the actual global lock + * Global lock spinlock is used for "pending" handshake */ ACPI_EXTERN union acpi_operand_object *acpi_gbl_global_lock_mutex; ACPI_EXTERN acpi_semaphore acpi_gbl_global_lock_semaphore; +ACPI_EXTERN acpi_spinlock acpi_gbl_global_lock_pending_lock; ACPI_EXTERN u16 acpi_gbl_global_lock_handle; ACPI_EXTERN u8 acpi_gbl_global_lock_acquired; ACPI_EXTERN u8 acpi_gbl_global_lock_present; +ACPI_EXTERN u8 acpi_gbl_global_lock_pending; /* * Spinlocks are used for interfaces that can be possibly called at @@ -228,7 +231,6 @@ ACPI_EXTERN u8 acpi_gbl_global_lock_present; */ ACPI_EXTERN acpi_spinlock acpi_gbl_gpe_lock; /* For GPE data structs and registers */ ACPI_EXTERN acpi_spinlock acpi_gbl_hardware_lock; /* For ACPI H/W except GPE registers */ -ACPI_EXTERN acpi_spinlock acpi_ev_global_lock_pending_lock; /* For global lock */ /***************************************************************************** * diff --git a/drivers/acpi/acpica/evmisc.c b/drivers/acpi/acpica/evmisc.c index 7dc8094..69a3b4a 100644 --- a/drivers/acpi/acpica/evmisc.c +++ b/drivers/acpi/acpica/evmisc.c @@ -284,39 +284,41 @@ static void ACPI_SYSTEM_XFACE acpi_ev_notify_dispatch(void *context) * RETURN: ACPI_INTERRUPT_HANDLED * * DESCRIPTION: Invoked directly from the SCI handler when a global lock - * release interrupt occurs. If there's a thread waiting for - * the global lock, signal it. - * - * NOTE: Assumes that the semaphore can be signaled from interrupt level. If - * this is not possible for some reason, a separate thread will have to be - * scheduled to do this. + * release interrupt occurs. If there is actually a pending + * request for the lock, signal the waiting thread. * ******************************************************************************/ -static u8 acpi_ev_global_lock_pending; static u32 acpi_ev_global_lock_handler(void *context) { acpi_status status; acpi_cpu_flags flags; - flags = acpi_os_acquire_lock(acpi_ev_global_lock_pending_lock); + flags = acpi_os_acquire_lock(acpi_gbl_global_lock_pending_lock); - if (!acpi_ev_global_lock_pending) { - goto out; + /* + * If a request for the global lock is not actually pending, + * we are done. This handles "spurious" global lock interrupts + * which are possible (and have been seen) with bad BIOSs. + */ + if (!acpi_gbl_global_lock_pending) { + goto cleanup_and_exit; } - /* Send a unit to the semaphore */ - + /* + * Send a unit to the global lock semaphore. The actual acquisition + * of the global lock will be performed by the waiting thread. + */ status = acpi_os_signal_semaphore(acpi_gbl_global_lock_semaphore, 1); if (ACPI_FAILURE(status)) { ACPI_ERROR((AE_INFO, "Could not signal Global Lock semaphore")); } - acpi_ev_global_lock_pending = FALSE; + acpi_gbl_global_lock_pending = FALSE; - out: - acpi_os_release_lock(acpi_ev_global_lock_pending_lock, flags); +cleanup_and_exit: + acpi_os_release_lock(acpi_gbl_global_lock_pending_lock, flags); return (ACPI_INTERRUPT_HANDLED); } @@ -350,14 +352,20 @@ acpi_status acpi_ev_init_global_lock_handler(void) * Map to AE_OK, but mark global lock as not present. Any attempt to * actually use the global lock will be flagged with an error. */ + acpi_gbl_global_lock_present = FALSE; if (status == AE_NO_HARDWARE_RESPONSE) { ACPI_ERROR((AE_INFO, "No response from Global Lock hardware, disabling lock")); - acpi_gbl_global_lock_present = FALSE; return_ACPI_STATUS(AE_OK); } + status = acpi_os_create_lock(&acpi_gbl_global_lock_pending_lock); + if (ACPI_FAILURE(status)) { + return_ACPI_STATUS(status); + } + + acpi_gbl_global_lock_pending = FALSE; acpi_gbl_global_lock_present = TRUE; return_ACPI_STATUS(status); } @@ -414,7 +422,7 @@ static int acpi_ev_global_lock_acquired; acpi_status acpi_ev_acquire_global_lock(u16 timeout) { acpi_cpu_flags flags; - acpi_status status = AE_OK; + acpi_status status; u8 acquired = FALSE; ACPI_FUNCTION_TRACE(ev_acquire_global_lock); @@ -458,15 +466,15 @@ acpi_status acpi_ev_acquire_global_lock(u16 timeout) } /* - * Make sure that a global lock actually exists. If not, just treat the - * lock as a standard mutex. + * Make sure that a global lock actually exists. If not, just + * treat the lock as a standard mutex. */ if (!acpi_gbl_global_lock_present) { acpi_gbl_global_lock_acquired = TRUE; return_ACPI_STATUS(AE_OK); } - flags = acpi_os_acquire_lock(acpi_ev_global_lock_pending_lock); + flags = acpi_os_acquire_lock(acpi_gbl_global_lock_pending_lock); do { @@ -475,20 +483,19 @@ acpi_status acpi_ev_acquire_global_lock(u16 timeout) ACPI_ACQUIRE_GLOBAL_LOCK(acpi_gbl_FACS, acquired); if (acquired) { acpi_gbl_global_lock_acquired = TRUE; - ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "Acquired hardware Global Lock\n")); break; } - acpi_ev_global_lock_pending = TRUE; - - acpi_os_release_lock(acpi_ev_global_lock_pending_lock, flags); - /* - * Did not get the lock. The pending bit was set above, and we - * must wait until we get the global lock released interrupt. + * Did not get the lock. The pending bit was set above, and + * we must now wait until we receive the global lock + * released interrupt. */ + acpi_gbl_global_lock_pending = TRUE; + acpi_os_release_lock(acpi_gbl_global_lock_pending_lock, flags); + ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "Waiting for hardware Global Lock\n")); @@ -496,17 +503,16 @@ acpi_status acpi_ev_acquire_global_lock(u16 timeout) * Wait for handshake with the global lock interrupt handler. * This interface releases the interpreter if we must wait. */ - status = acpi_ex_system_wait_semaphore( - acpi_gbl_global_lock_semaphore, - ACPI_WAIT_FOREVER); + status = + acpi_ex_system_wait_semaphore + (acpi_gbl_global_lock_semaphore, ACPI_WAIT_FOREVER); - flags = acpi_os_acquire_lock(acpi_ev_global_lock_pending_lock); + flags = acpi_os_acquire_lock(acpi_gbl_global_lock_pending_lock); } while (ACPI_SUCCESS(status)); - acpi_ev_global_lock_pending = FALSE; - - acpi_os_release_lock(acpi_ev_global_lock_pending_lock, flags); + acpi_gbl_global_lock_pending = FALSE; + acpi_os_release_lock(acpi_gbl_global_lock_pending_lock, flags); return_ACPI_STATUS(status); } diff --git a/drivers/acpi/acpica/utmutex.c b/drivers/acpi/acpica/utmutex.c index 519d4ee..7d797e2 100644 --- a/drivers/acpi/acpica/utmutex.c +++ b/drivers/acpi/acpica/utmutex.c @@ -93,11 +93,6 @@ acpi_status acpi_ut_mutex_initialize(void) return_ACPI_STATUS (status); } - status = acpi_os_create_lock (&acpi_ev_global_lock_pending_lock); - if (ACPI_FAILURE (status)) { - return_ACPI_STATUS (status); - } - /* Mutex for _OSI support */ status = acpi_os_create_mutex(&acpi_gbl_osi_mutex); if (ACPI_FAILURE(status)) { -- cgit v0.10.2 From 1cb7b1e0de6a1f8f071f4a146e3d10f3a662f707 Mon Sep 17 00:00:00 2001 From: Thomas Renninger Date: Thu, 31 Mar 2011 13:36:38 +0200 Subject: ACPI EC: remove dead code static void acpi_ec_gpe_query(void *ec_cxt); -> The function is right above this declaration -> not needed. poll_force is also not used, cleaned up in ec.c and its users: compal-laptop and msi-laptop. Signed-off-by: Thomas Renninger Signed-off-by: Len Brown diff --git a/drivers/acpi/ec.c b/drivers/acpi/ec.c index fa848c4..b3f1d6f 100644 --- a/drivers/acpi/ec.c +++ b/drivers/acpi/ec.c @@ -69,7 +69,6 @@ enum ec_command { #define ACPI_EC_DELAY 500 /* Wait 500ms max. during EC ops */ #define ACPI_EC_UDELAY_GLK 1000 /* Wait 1ms max. to get global lock */ -#define ACPI_EC_CDELAY 10 /* Wait 10us before polling EC */ #define ACPI_EC_MSI_UDELAY 550 /* Wait 550us for MSI EC */ #define ACPI_EC_STORM_THRESHOLD 8 /* number of false interrupts @@ -433,8 +432,7 @@ EXPORT_SYMBOL(ec_write); int ec_transaction(u8 command, const u8 * wdata, unsigned wdata_len, - u8 * rdata, unsigned rdata_len, - int force_poll) + u8 * rdata, unsigned rdata_len) { struct transaction t = {.command = command, .wdata = wdata, .rdata = rdata, @@ -592,8 +590,6 @@ static void acpi_ec_gpe_query(void *ec_cxt) mutex_unlock(&ec->lock); } -static void acpi_ec_gpe_query(void *ec_cxt); - static int ec_check_sci(struct acpi_ec *ec, u8 state) { if (state & ACPI_EC_FLAG_SCI) { diff --git a/drivers/platform/x86/compal-laptop.c b/drivers/platform/x86/compal-laptop.c index 034572b..f4f43e6 100644 --- a/drivers/platform/x86/compal-laptop.c +++ b/drivers/platform/x86/compal-laptop.c @@ -200,7 +200,7 @@ static bool extra_features; * watching the output of address 0x4F (do an ec_transaction writing 0x33 * into 0x4F and read a few bytes from the output, like so: * u8 writeData = 0x33; - * ec_transaction(0x4F, &writeData, 1, buffer, 32, 0); + * ec_transaction(0x4F, &writeData, 1, buffer, 32); * That address is labled "fan1 table information" in the service manual. * It should be clear which value in 'buffer' changes). This seems to be * related to fan speed. It isn't a proper 'realtime' fan speed value @@ -286,7 +286,7 @@ static int get_backlight_level(void) static void set_backlight_state(bool on) { u8 data = on ? BACKLIGHT_STATE_ON_DATA : BACKLIGHT_STATE_OFF_DATA; - ec_transaction(BACKLIGHT_STATE_ADDR, &data, 1, NULL, 0, 0); + ec_transaction(BACKLIGHT_STATE_ADDR, &data, 1, NULL, 0); } @@ -294,24 +294,24 @@ static void set_backlight_state(bool on) static void pwm_enable_control(void) { unsigned char writeData = PWM_ENABLE_DATA; - ec_transaction(PWM_ENABLE_ADDR, &writeData, 1, NULL, 0, 0); + ec_transaction(PWM_ENABLE_ADDR, &writeData, 1, NULL, 0); } static void pwm_disable_control(void) { unsigned char writeData = PWM_DISABLE_DATA; - ec_transaction(PWM_DISABLE_ADDR, &writeData, 1, NULL, 0, 0); + ec_transaction(PWM_DISABLE_ADDR, &writeData, 1, NULL, 0); } static void set_pwm(int pwm) { - ec_transaction(PWM_ADDRESS, &pwm_lookup_table[pwm], 1, NULL, 0, 0); + ec_transaction(PWM_ADDRESS, &pwm_lookup_table[pwm], 1, NULL, 0); } static int get_fan_rpm(void) { u8 value, data = FAN_DATA; - ec_transaction(FAN_ADDRESS, &data, 1, &value, 1, 0); + ec_transaction(FAN_ADDRESS, &data, 1, &value, 1); return 100 * (int)value; } diff --git a/drivers/platform/x86/msi-laptop.c b/drivers/platform/x86/msi-laptop.c index 7e9bb6d..918a65d 100644 --- a/drivers/platform/x86/msi-laptop.c +++ b/drivers/platform/x86/msi-laptop.c @@ -120,7 +120,7 @@ static int set_lcd_level(int level) buf[1] = (u8) (level*31); return ec_transaction(MSI_EC_COMMAND_LCD_LEVEL, buf, sizeof(buf), - NULL, 0, 1); + NULL, 0); } static int get_lcd_level(void) @@ -129,7 +129,7 @@ static int get_lcd_level(void) int result; result = ec_transaction(MSI_EC_COMMAND_LCD_LEVEL, &wdata, 1, - &rdata, 1, 1); + &rdata, 1); if (result < 0) return result; @@ -142,7 +142,7 @@ static int get_auto_brightness(void) int result; result = ec_transaction(MSI_EC_COMMAND_LCD_LEVEL, &wdata, 1, - &rdata, 1, 1); + &rdata, 1); if (result < 0) return result; @@ -157,7 +157,7 @@ static int set_auto_brightness(int enable) wdata[0] = 4; result = ec_transaction(MSI_EC_COMMAND_LCD_LEVEL, wdata, 1, - &rdata, 1, 1); + &rdata, 1); if (result < 0) return result; @@ -165,7 +165,7 @@ static int set_auto_brightness(int enable) wdata[1] = (rdata & 0xF7) | (enable ? 8 : 0); return ec_transaction(MSI_EC_COMMAND_LCD_LEVEL, wdata, 2, - NULL, 0, 1); + NULL, 0); } static ssize_t set_device_state(const char *buf, size_t count, u8 mask) @@ -202,7 +202,7 @@ static int get_wireless_state(int *wlan, int *bluetooth) u8 wdata = 0, rdata; int result; - result = ec_transaction(MSI_EC_COMMAND_WIRELESS, &wdata, 1, &rdata, 1, 1); + result = ec_transaction(MSI_EC_COMMAND_WIRELESS, &wdata, 1, &rdata, 1); if (result < 0) return -1; diff --git a/include/linux/acpi.h b/include/linux/acpi.h index a2e910e..1deb2a7 100644 --- a/include/linux/acpi.h +++ b/include/linux/acpi.h @@ -150,8 +150,7 @@ extern int ec_read(u8 addr, u8 *val); extern int ec_write(u8 addr, u8 val); extern int ec_transaction(u8 command, const u8 *wdata, unsigned wdata_len, - u8 *rdata, unsigned rdata_len, - int force_poll); + u8 *rdata, unsigned rdata_len); #if defined(CONFIG_ACPI_WMI) || defined(CONFIG_ACPI_WMI_MODULE) -- cgit v0.10.2 From af986d101d141f10231ffa7e40ae397dc7356857 Mon Sep 17 00:00:00 2001 From: Peter Collingbourne Date: Sun, 24 Apr 2011 22:09:32 +0100 Subject: ACPI: EC: add another DMI check for ASUS hardware Commit 0adf3c746a73684b3f8c2821a584e1db998f61e9 introduced a regression by making the ECDT validation test for ASUS hardware more restrictive. The previous test used the dmi_name_in_vendors function which searches a number of DMI fields, while the new test checked only the BIOS vendor, which is known to not match on an ASUS F5GL laptop which requires ECDT validation. Add a rule to ec_dmi_table based on an alternative DMI pattern for ASUS hardware as found elsewhere in the kernel. Signed-off-by: Peter Collingbourne Signed-off-by: Len Brown diff --git a/drivers/acpi/ec.c b/drivers/acpi/ec.c index fa848c4..30ca717 100644 --- a/drivers/acpi/ec.c +++ b/drivers/acpi/ec.c @@ -940,6 +940,9 @@ static struct dmi_system_id __initdata ec_dmi_table[] = { { ec_validate_ecdt, "ASUS hardware", { DMI_MATCH(DMI_BIOS_VENDOR, "ASUS") }, NULL}, + { + ec_validate_ecdt, "ASUS hardware", { + DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer Inc.") }, NULL}, {}, }; -- cgit v0.10.2 From 0f6896f195df014064014493c8287a8e2d18f938 Mon Sep 17 00:00:00 2001 From: Bob Moore Date: Wed, 13 Apr 2011 11:33:17 +0800 Subject: ACPICA: Split all internal Global Lock functions to new file - evglock These functions were moved from evmisc.c Signed-off-by: Bob Moore Signed-off-by: Lin Ming Signed-off-by: Len Brown diff --git a/drivers/acpi/acpica/Makefile b/drivers/acpi/acpica/Makefile index a122471..301bd2d 100644 --- a/drivers/acpi/acpica/Makefile +++ b/drivers/acpi/acpica/Makefile @@ -14,7 +14,7 @@ acpi-y := dsfield.o dsmthdat.o dsopcode.o dswexec.o dswscope.o \ acpi-y += evevent.o evregion.o evsci.o evxfevnt.o \ evmisc.o evrgnini.o evxface.o evxfregn.o \ - evgpe.o evgpeblk.o evgpeinit.o evgpeutil.o evxfgpe.o + evgpe.o evgpeblk.o evgpeinit.o evgpeutil.o evxfgpe.o evglock.o acpi-y += exconfig.o exfield.o exnames.o exoparg6.o exresolv.o exstorob.o\ exconvrt.o exfldio.o exoparg1.o exprep.o exresop.o exsystem.o\ diff --git a/drivers/acpi/acpica/acevents.h b/drivers/acpi/acpica/acevents.h index 41d247d..bea3b48 100644 --- a/drivers/acpi/acpica/acevents.h +++ b/drivers/acpi/acpica/acevents.h @@ -58,12 +58,6 @@ u32 acpi_ev_fixed_event_detect(void); */ u8 acpi_ev_is_notify_object(struct acpi_namespace_node *node); -acpi_status acpi_ev_acquire_global_lock(u16 timeout); - -acpi_status acpi_ev_release_global_lock(void); - -acpi_status acpi_ev_init_global_lock_handler(void); - u32 acpi_ev_get_gpe_number_index(u32 gpe_number); acpi_status @@ -71,6 +65,17 @@ acpi_ev_queue_notify_request(struct acpi_namespace_node *node, u32 notify_value); /* + * evglock - Global Lock support + */ +acpi_status acpi_ev_init_global_lock_handler(void); + +acpi_status acpi_ev_acquire_global_lock(u16 timeout); + +acpi_status acpi_ev_release_global_lock(void); + +acpi_status acpi_ev_remove_global_lock_handler(void); + +/* * evgpe - Low-level GPE support */ u32 acpi_ev_gpe_detect(struct acpi_gpe_xrupt_info *gpe_xrupt_list); diff --git a/drivers/acpi/acpica/evglock.c b/drivers/acpi/acpica/evglock.c new file mode 100644 index 0000000..56a562a --- /dev/null +++ b/drivers/acpi/acpica/evglock.c @@ -0,0 +1,335 @@ +/****************************************************************************** + * + * Module Name: evglock - Global Lock support + * + *****************************************************************************/ + +/* + * Copyright (C) 2000 - 2011, Intel Corp. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions, and the following disclaimer, + * without modification. + * 2. Redistributions in binary form must reproduce at minimum a disclaimer + * substantially similar to the "NO WARRANTY" disclaimer below + * ("Disclaimer") and any redistribution must be conditioned upon + * including a substantially similar Disclaimer requirement for further + * binary redistribution. + * 3. Neither the names of the above-listed copyright holders nor the names + * of any contributors may be used to endorse or promote products derived + * from this software without specific prior written permission. + * + * Alternatively, this software may be distributed under the terms of the + * GNU General Public License ("GPL") version 2 as published by the Free + * Software Foundation. + * + * NO WARRANTY + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, + * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGES. + */ + +#include +#include "accommon.h" +#include "acevents.h" +#include "acinterp.h" + +#define _COMPONENT ACPI_EVENTS +ACPI_MODULE_NAME("evglock") + +/* Local prototypes */ +static u32 acpi_ev_global_lock_handler(void *context); + +/******************************************************************************* + * + * FUNCTION: acpi_ev_init_global_lock_handler + * + * PARAMETERS: None + * + * RETURN: Status + * + * DESCRIPTION: Install a handler for the global lock release event + * + ******************************************************************************/ + +acpi_status acpi_ev_init_global_lock_handler(void) +{ + acpi_status status; + + ACPI_FUNCTION_TRACE(ev_init_global_lock_handler); + + /* Attempt installation of the global lock handler */ + + status = acpi_install_fixed_event_handler(ACPI_EVENT_GLOBAL, + acpi_ev_global_lock_handler, + NULL); + + /* + * If the global lock does not exist on this platform, the attempt to + * enable GBL_STATUS will fail (the GBL_ENABLE bit will not stick). + * Map to AE_OK, but mark global lock as not present. Any attempt to + * actually use the global lock will be flagged with an error. + */ + acpi_gbl_global_lock_present = FALSE; + if (status == AE_NO_HARDWARE_RESPONSE) { + ACPI_ERROR((AE_INFO, + "No response from Global Lock hardware, disabling lock")); + + return_ACPI_STATUS(AE_OK); + } + + status = acpi_os_create_lock(&acpi_gbl_global_lock_pending_lock); + if (ACPI_FAILURE(status)) { + return_ACPI_STATUS(status); + } + + acpi_gbl_global_lock_pending = FALSE; + acpi_gbl_global_lock_present = TRUE; + return_ACPI_STATUS(status); +} + +/******************************************************************************* + * + * FUNCTION: acpi_ev_remove_global_lock_handler + * + * PARAMETERS: None + * + * RETURN: Status + * + * DESCRIPTION: Remove the handler for the Global Lock + * + ******************************************************************************/ + +acpi_status acpi_ev_remove_global_lock_handler(void) +{ + acpi_status status; + + ACPI_FUNCTION_TRACE(ev_remove_global_lock_handler); + + acpi_gbl_global_lock_present = FALSE; + status = acpi_remove_fixed_event_handler(ACPI_EVENT_GLOBAL, + acpi_ev_global_lock_handler); + + return_ACPI_STATUS(status); +} + +/******************************************************************************* + * + * FUNCTION: acpi_ev_global_lock_handler + * + * PARAMETERS: Context - From thread interface, not used + * + * RETURN: ACPI_INTERRUPT_HANDLED + * + * DESCRIPTION: Invoked directly from the SCI handler when a global lock + * release interrupt occurs. If there is actually a pending + * request for the lock, signal the waiting thread. + * + ******************************************************************************/ + +static u32 acpi_ev_global_lock_handler(void *context) +{ + acpi_status status; + acpi_cpu_flags flags; + + flags = acpi_os_acquire_lock(acpi_gbl_global_lock_pending_lock); + + /* + * If a request for the global lock is not actually pending, + * we are done. This handles "spurious" global lock interrupts + * which are possible (and have been seen) with bad BIOSs. + */ + if (!acpi_gbl_global_lock_pending) { + goto cleanup_and_exit; + } + + /* + * Send a unit to the global lock semaphore. The actual acquisition + * of the global lock will be performed by the waiting thread. + */ + status = acpi_os_signal_semaphore(acpi_gbl_global_lock_semaphore, 1); + if (ACPI_FAILURE(status)) { + ACPI_ERROR((AE_INFO, "Could not signal Global Lock semaphore")); + } + + acpi_gbl_global_lock_pending = FALSE; + + cleanup_and_exit: + + acpi_os_release_lock(acpi_gbl_global_lock_pending_lock, flags); + return (ACPI_INTERRUPT_HANDLED); +} + +/****************************************************************************** + * + * FUNCTION: acpi_ev_acquire_global_lock + * + * PARAMETERS: Timeout - Max time to wait for the lock, in millisec. + * + * RETURN: Status + * + * DESCRIPTION: Attempt to gain ownership of the Global Lock. + * + * MUTEX: Interpreter must be locked + * + * Note: The original implementation allowed multiple threads to "acquire" the + * Global Lock, and the OS would hold the lock until the last thread had + * released it. However, this could potentially starve the BIOS out of the + * lock, especially in the case where there is a tight handshake between the + * Embedded Controller driver and the BIOS. Therefore, this implementation + * allows only one thread to acquire the HW Global Lock at a time, and makes + * the global lock appear as a standard mutex on the OS side. + * + *****************************************************************************/ + +acpi_status acpi_ev_acquire_global_lock(u16 timeout) +{ + acpi_cpu_flags flags; + acpi_status status; + u8 acquired = FALSE; + + ACPI_FUNCTION_TRACE(ev_acquire_global_lock); + + /* + * Only one thread can acquire the GL at a time, the global_lock_mutex + * enforces this. This interface releases the interpreter if we must wait. + */ + status = + acpi_ex_system_wait_mutex(acpi_gbl_global_lock_mutex->mutex. + os_mutex, timeout); + if (ACPI_FAILURE(status)) { + return_ACPI_STATUS(status); + } + + /* + * Update the global lock handle and check for wraparound. The handle is + * only used for the external global lock interfaces, but it is updated + * here to properly handle the case where a single thread may acquire the + * lock via both the AML and the acpi_acquire_global_lock interfaces. The + * handle is therefore updated on the first acquire from a given thread + * regardless of where the acquisition request originated. + */ + acpi_gbl_global_lock_handle++; + if (acpi_gbl_global_lock_handle == 0) { + acpi_gbl_global_lock_handle = 1; + } + + /* + * Make sure that a global lock actually exists. If not, just + * treat the lock as a standard mutex. + */ + if (!acpi_gbl_global_lock_present) { + acpi_gbl_global_lock_acquired = TRUE; + return_ACPI_STATUS(AE_OK); + } + + flags = acpi_os_acquire_lock(acpi_gbl_global_lock_pending_lock); + + do { + + /* Attempt to acquire the actual hardware lock */ + + ACPI_ACQUIRE_GLOBAL_LOCK(acpi_gbl_FACS, acquired); + if (acquired) { + acpi_gbl_global_lock_acquired = TRUE; + ACPI_DEBUG_PRINT((ACPI_DB_EXEC, + "Acquired hardware Global Lock\n")); + break; + } + + /* + * Did not get the lock. The pending bit was set above, and + * we must now wait until we receive the global lock + * released interrupt. + */ + acpi_gbl_global_lock_pending = TRUE; + acpi_os_release_lock(acpi_gbl_global_lock_pending_lock, flags); + + ACPI_DEBUG_PRINT((ACPI_DB_EXEC, + "Waiting for hardware Global Lock\n")); + + /* + * Wait for handshake with the global lock interrupt handler. + * This interface releases the interpreter if we must wait. + */ + status = + acpi_ex_system_wait_semaphore + (acpi_gbl_global_lock_semaphore, ACPI_WAIT_FOREVER); + + flags = acpi_os_acquire_lock(acpi_gbl_global_lock_pending_lock); + + } while (ACPI_SUCCESS(status)); + + acpi_gbl_global_lock_pending = FALSE; + acpi_os_release_lock(acpi_gbl_global_lock_pending_lock, flags); + + return_ACPI_STATUS(status); +} + +/******************************************************************************* + * + * FUNCTION: acpi_ev_release_global_lock + * + * PARAMETERS: None + * + * RETURN: Status + * + * DESCRIPTION: Releases ownership of the Global Lock. + * + ******************************************************************************/ + +acpi_status acpi_ev_release_global_lock(void) +{ + u8 pending = FALSE; + acpi_status status = AE_OK; + + ACPI_FUNCTION_TRACE(ev_release_global_lock); + + /* Lock must be already acquired */ + + if (!acpi_gbl_global_lock_acquired) { + ACPI_WARNING((AE_INFO, + "Cannot release the ACPI Global Lock, it has not been acquired")); + return_ACPI_STATUS(AE_NOT_ACQUIRED); + } + + if (acpi_gbl_global_lock_present) { + + /* Allow any thread to release the lock */ + + ACPI_RELEASE_GLOBAL_LOCK(acpi_gbl_FACS, pending); + + /* + * If the pending bit was set, we must write GBL_RLS to the control + * register + */ + if (pending) { + status = + acpi_write_bit_register + (ACPI_BITREG_GLOBAL_LOCK_RELEASE, + ACPI_ENABLE_EVENT); + } + + ACPI_DEBUG_PRINT((ACPI_DB_EXEC, + "Released hardware Global Lock\n")); + } + + acpi_gbl_global_lock_acquired = FALSE; + + /* Release the local GL mutex */ + + acpi_os_release_mutex(acpi_gbl_global_lock_mutex->mutex.os_mutex); + return_ACPI_STATUS(status); +} diff --git a/drivers/acpi/acpica/evmisc.c b/drivers/acpi/acpica/evmisc.c index 69a3b4a..d0b3318 100644 --- a/drivers/acpi/acpica/evmisc.c +++ b/drivers/acpi/acpica/evmisc.c @@ -45,7 +45,6 @@ #include "accommon.h" #include "acevents.h" #include "acnamesp.h" -#include "acinterp.h" #define _COMPONENT ACPI_EVENTS ACPI_MODULE_NAME("evmisc") @@ -53,10 +52,6 @@ ACPI_MODULE_NAME("evmisc") /* Local prototypes */ static void ACPI_SYSTEM_XFACE acpi_ev_notify_dispatch(void *context); -static u32 acpi_ev_global_lock_handler(void *context); - -static acpi_status acpi_ev_remove_global_lock_handler(void); - /******************************************************************************* * * FUNCTION: acpi_ev_is_notify_object @@ -275,310 +270,6 @@ static void ACPI_SYSTEM_XFACE acpi_ev_notify_dispatch(void *context) acpi_ut_delete_generic_state(notify_info); } -/******************************************************************************* - * - * FUNCTION: acpi_ev_global_lock_handler - * - * PARAMETERS: Context - From thread interface, not used - * - * RETURN: ACPI_INTERRUPT_HANDLED - * - * DESCRIPTION: Invoked directly from the SCI handler when a global lock - * release interrupt occurs. If there is actually a pending - * request for the lock, signal the waiting thread. - * - ******************************************************************************/ - -static u32 acpi_ev_global_lock_handler(void *context) -{ - acpi_status status; - acpi_cpu_flags flags; - - flags = acpi_os_acquire_lock(acpi_gbl_global_lock_pending_lock); - - /* - * If a request for the global lock is not actually pending, - * we are done. This handles "spurious" global lock interrupts - * which are possible (and have been seen) with bad BIOSs. - */ - if (!acpi_gbl_global_lock_pending) { - goto cleanup_and_exit; - } - - /* - * Send a unit to the global lock semaphore. The actual acquisition - * of the global lock will be performed by the waiting thread. - */ - status = acpi_os_signal_semaphore(acpi_gbl_global_lock_semaphore, 1); - if (ACPI_FAILURE(status)) { - ACPI_ERROR((AE_INFO, "Could not signal Global Lock semaphore")); - } - - acpi_gbl_global_lock_pending = FALSE; - -cleanup_and_exit: - - acpi_os_release_lock(acpi_gbl_global_lock_pending_lock, flags); - return (ACPI_INTERRUPT_HANDLED); -} - -/******************************************************************************* - * - * FUNCTION: acpi_ev_init_global_lock_handler - * - * PARAMETERS: None - * - * RETURN: Status - * - * DESCRIPTION: Install a handler for the global lock release event - * - ******************************************************************************/ - -acpi_status acpi_ev_init_global_lock_handler(void) -{ - acpi_status status; - - ACPI_FUNCTION_TRACE(ev_init_global_lock_handler); - - /* Attempt installation of the global lock handler */ - - status = acpi_install_fixed_event_handler(ACPI_EVENT_GLOBAL, - acpi_ev_global_lock_handler, - NULL); - - /* - * If the global lock does not exist on this platform, the attempt to - * enable GBL_STATUS will fail (the GBL_ENABLE bit will not stick). - * Map to AE_OK, but mark global lock as not present. Any attempt to - * actually use the global lock will be flagged with an error. - */ - acpi_gbl_global_lock_present = FALSE; - if (status == AE_NO_HARDWARE_RESPONSE) { - ACPI_ERROR((AE_INFO, - "No response from Global Lock hardware, disabling lock")); - - return_ACPI_STATUS(AE_OK); - } - - status = acpi_os_create_lock(&acpi_gbl_global_lock_pending_lock); - if (ACPI_FAILURE(status)) { - return_ACPI_STATUS(status); - } - - acpi_gbl_global_lock_pending = FALSE; - acpi_gbl_global_lock_present = TRUE; - return_ACPI_STATUS(status); -} - -/******************************************************************************* - * - * FUNCTION: acpi_ev_remove_global_lock_handler - * - * PARAMETERS: None - * - * RETURN: Status - * - * DESCRIPTION: Remove the handler for the Global Lock - * - ******************************************************************************/ - -static acpi_status acpi_ev_remove_global_lock_handler(void) -{ - acpi_status status; - - ACPI_FUNCTION_TRACE(ev_remove_global_lock_handler); - - acpi_gbl_global_lock_present = FALSE; - status = acpi_remove_fixed_event_handler(ACPI_EVENT_GLOBAL, - acpi_ev_global_lock_handler); - - return_ACPI_STATUS(status); -} - -/****************************************************************************** - * - * FUNCTION: acpi_ev_acquire_global_lock - * - * PARAMETERS: Timeout - Max time to wait for the lock, in millisec. - * - * RETURN: Status - * - * DESCRIPTION: Attempt to gain ownership of the Global Lock. - * - * MUTEX: Interpreter must be locked - * - * Note: The original implementation allowed multiple threads to "acquire" the - * Global Lock, and the OS would hold the lock until the last thread had - * released it. However, this could potentially starve the BIOS out of the - * lock, especially in the case where there is a tight handshake between the - * Embedded Controller driver and the BIOS. Therefore, this implementation - * allows only one thread to acquire the HW Global Lock at a time, and makes - * the global lock appear as a standard mutex on the OS side. - * - *****************************************************************************/ -static acpi_thread_id acpi_ev_global_lock_thread_id; -static int acpi_ev_global_lock_acquired; - -acpi_status acpi_ev_acquire_global_lock(u16 timeout) -{ - acpi_cpu_flags flags; - acpi_status status; - u8 acquired = FALSE; - - ACPI_FUNCTION_TRACE(ev_acquire_global_lock); - - /* - * Only one thread can acquire the GL at a time, the global_lock_mutex - * enforces this. This interface releases the interpreter if we must wait. - */ - status = acpi_ex_system_wait_mutex( - acpi_gbl_global_lock_mutex->mutex.os_mutex, 0); - if (status == AE_TIME) { - if (acpi_ev_global_lock_thread_id == acpi_os_get_thread_id()) { - acpi_ev_global_lock_acquired++; - return AE_OK; - } - } - - if (ACPI_FAILURE(status)) { - status = acpi_ex_system_wait_mutex( - acpi_gbl_global_lock_mutex->mutex.os_mutex, - timeout); - } - if (ACPI_FAILURE(status)) { - return_ACPI_STATUS(status); - } - - acpi_ev_global_lock_thread_id = acpi_os_get_thread_id(); - acpi_ev_global_lock_acquired++; - - /* - * Update the global lock handle and check for wraparound. The handle is - * only used for the external global lock interfaces, but it is updated - * here to properly handle the case where a single thread may acquire the - * lock via both the AML and the acpi_acquire_global_lock interfaces. The - * handle is therefore updated on the first acquire from a given thread - * regardless of where the acquisition request originated. - */ - acpi_gbl_global_lock_handle++; - if (acpi_gbl_global_lock_handle == 0) { - acpi_gbl_global_lock_handle = 1; - } - - /* - * Make sure that a global lock actually exists. If not, just - * treat the lock as a standard mutex. - */ - if (!acpi_gbl_global_lock_present) { - acpi_gbl_global_lock_acquired = TRUE; - return_ACPI_STATUS(AE_OK); - } - - flags = acpi_os_acquire_lock(acpi_gbl_global_lock_pending_lock); - - do { - - /* Attempt to acquire the actual hardware lock */ - - ACPI_ACQUIRE_GLOBAL_LOCK(acpi_gbl_FACS, acquired); - if (acquired) { - acpi_gbl_global_lock_acquired = TRUE; - ACPI_DEBUG_PRINT((ACPI_DB_EXEC, - "Acquired hardware Global Lock\n")); - break; - } - - /* - * Did not get the lock. The pending bit was set above, and - * we must now wait until we receive the global lock - * released interrupt. - */ - acpi_gbl_global_lock_pending = TRUE; - acpi_os_release_lock(acpi_gbl_global_lock_pending_lock, flags); - - ACPI_DEBUG_PRINT((ACPI_DB_EXEC, - "Waiting for hardware Global Lock\n")); - - /* - * Wait for handshake with the global lock interrupt handler. - * This interface releases the interpreter if we must wait. - */ - status = - acpi_ex_system_wait_semaphore - (acpi_gbl_global_lock_semaphore, ACPI_WAIT_FOREVER); - - flags = acpi_os_acquire_lock(acpi_gbl_global_lock_pending_lock); - - } while (ACPI_SUCCESS(status)); - - acpi_gbl_global_lock_pending = FALSE; - acpi_os_release_lock(acpi_gbl_global_lock_pending_lock, flags); - - return_ACPI_STATUS(status); -} - -/******************************************************************************* - * - * FUNCTION: acpi_ev_release_global_lock - * - * PARAMETERS: None - * - * RETURN: Status - * - * DESCRIPTION: Releases ownership of the Global Lock. - * - ******************************************************************************/ - -acpi_status acpi_ev_release_global_lock(void) -{ - u8 pending = FALSE; - acpi_status status = AE_OK; - - ACPI_FUNCTION_TRACE(ev_release_global_lock); - - /* Lock must be already acquired */ - - if (!acpi_gbl_global_lock_acquired) { - ACPI_WARNING((AE_INFO, - "Cannot release the ACPI Global Lock, it has not been acquired")); - return_ACPI_STATUS(AE_NOT_ACQUIRED); - } - - acpi_ev_global_lock_acquired--; - if (acpi_ev_global_lock_acquired > 0) { - return AE_OK; - } - - if (acpi_gbl_global_lock_present) { - - /* Allow any thread to release the lock */ - - ACPI_RELEASE_GLOBAL_LOCK(acpi_gbl_FACS, pending); - - /* - * If the pending bit was set, we must write GBL_RLS to the control - * register - */ - if (pending) { - status = - acpi_write_bit_register - (ACPI_BITREG_GLOBAL_LOCK_RELEASE, - ACPI_ENABLE_EVENT); - } - - ACPI_DEBUG_PRINT((ACPI_DB_EXEC, - "Released hardware Global Lock\n")); - } - - acpi_gbl_global_lock_acquired = FALSE; - - /* Release the local GL mutex */ - acpi_ev_global_lock_thread_id = 0; - acpi_ev_global_lock_acquired = 0; - acpi_os_release_mutex(acpi_gbl_global_lock_mutex->mutex.os_mutex); - return_ACPI_STATUS(status); -} - /****************************************************************************** * * FUNCTION: acpi_ev_terminate -- cgit v0.10.2 From 945488b9c5fc3f85e3f6a3580235b5c73febc8a6 Mon Sep 17 00:00:00 2001 From: Bob Moore Date: Wed, 13 Apr 2011 13:15:58 +0800 Subject: ACPICA: Add more methods eligible for NULL package element removal This change adds another group of predefined names to the list of names eligible to have NULL package elements dynamically removed. This group is the names that return a single variable-length package containing simple data types such as integers, buffers, strings. This includes: _ALx,_BCL,_CID, _DOD,_EDL,_FIX,_PCL,_PLD,_PMD,_PRx,_PSL,_Sx, and _TZD. http://www.acpica.org/bugzilla/show_bug.cgi?id=914 Signed-off-by: Bob Moore Signed-off-by: Lin Ming Signed-off-by: Len Brown diff --git a/drivers/acpi/acpica/nsrepair.c b/drivers/acpi/acpica/nsrepair.c index 1d76ac8..ac7b854 100644 --- a/drivers/acpi/acpica/nsrepair.c +++ b/drivers/acpi/acpica/nsrepair.c @@ -74,7 +74,6 @@ ACPI_MODULE_NAME("nsrepair") * * Additional possible repairs: * - * Optional/unnecessary NULL package elements removed * Required package elements that are NULL replaced by Integer/String/Buffer * Incorrect standalone package wrapped with required outer package * @@ -623,16 +622,12 @@ acpi_ns_remove_null_elements(struct acpi_predefined_data *data, ACPI_FUNCTION_NAME(ns_remove_null_elements); /* - * PTYPE1 packages contain no subpackages. - * PTYPE2 packages contain a variable number of sub-packages. We can - * safely remove all NULL elements from the PTYPE2 packages. + * We can safely remove all NULL elements from these package types: + * PTYPE1_VAR packages contain a variable number of simple data types. + * PTYPE2 packages contain a variable number of sub-packages. */ switch (package_type) { - case ACPI_PTYPE1_FIXED: case ACPI_PTYPE1_VAR: - case ACPI_PTYPE1_OPTION: - return; - case ACPI_PTYPE2: case ACPI_PTYPE2_COUNT: case ACPI_PTYPE2_PKG_COUNT: @@ -642,6 +637,8 @@ acpi_ns_remove_null_elements(struct acpi_predefined_data *data, break; default: + case ACPI_PTYPE1_FIXED: + case ACPI_PTYPE1_OPTION: return; } -- cgit v0.10.2 From 82a1b7cb83b6bd7d2fe3972e847c8ccbff55cb9c Mon Sep 17 00:00:00 2001 From: Bob Moore Date: Wed, 13 Apr 2011 13:19:35 +0800 Subject: ACPICA: Update internal address SpaceID for DataTable regions Moved this internal space id in preparation for ACPI 5.0 changes that will include some new space IDs. Signed-off-by: Bob Moore Signed-off-by: Lin Ming Signed-off-by: Len Brown diff --git a/drivers/acpi/acpica/acconfig.h b/drivers/acpi/acpica/acconfig.h index ab87396..c115bb9 100644 --- a/drivers/acpi/acpica/acconfig.h +++ b/drivers/acpi/acpica/acconfig.h @@ -187,7 +187,7 @@ /* Operation regions */ -#define ACPI_NUM_PREDEFINED_REGIONS 9 +#define ACPI_NUM_PREDEFINED_REGIONS 8 #define ACPI_USER_REGION_BEGIN 0x80 /* Maximum space_ids for Operation Regions */ diff --git a/drivers/acpi/acpica/amlcode.h b/drivers/acpi/acpica/amlcode.h index f4f0998..1077f17 100644 --- a/drivers/acpi/acpica/amlcode.h +++ b/drivers/acpi/acpica/amlcode.h @@ -394,21 +394,6 @@ #define AML_CLASS_METHOD_CALL 0x09 #define AML_CLASS_UNKNOWN 0x0A -/* Predefined Operation Region space_iDs */ - -typedef enum { - REGION_MEMORY = 0, - REGION_IO, - REGION_PCI_CONFIG, - REGION_EC, - REGION_SMBUS, - REGION_CMOS, - REGION_PCI_BAR, - REGION_IPMI, - REGION_DATA_TABLE, /* Internal use only */ - REGION_FIXED_HW = 0x7F -} AML_REGION_TYPES; - /* Comparison operation codes for match_op operator */ typedef enum { diff --git a/drivers/acpi/acpica/dswload.c b/drivers/acpi/acpica/dswload.c index 23a3b1a..324acec 100644 --- a/drivers/acpi/acpica/dswload.c +++ b/drivers/acpi/acpica/dswload.c @@ -450,7 +450,7 @@ acpi_status acpi_ds_load1_end_op(struct acpi_walk_state *walk_state) status = acpi_ex_create_region(op->named.data, op->named.length, - REGION_DATA_TABLE, + ACPI_ADR_SPACE_DATA_TABLE, walk_state); if (ACPI_FAILURE(status)) { return_ACPI_STATUS(status); diff --git a/drivers/acpi/acpica/dswload2.c b/drivers/acpi/acpica/dswload2.c index 4be4e92..9763181 100644 --- a/drivers/acpi/acpica/dswload2.c +++ b/drivers/acpi/acpica/dswload2.c @@ -562,7 +562,7 @@ acpi_status acpi_ds_load2_end_op(struct acpi_walk_state *walk_state) ((op->common.value.arg)->common.value. integer); } else { - region_space = REGION_DATA_TABLE; + region_space = ACPI_ADR_SPACE_DATA_TABLE; } /* diff --git a/drivers/acpi/acpica/excreate.c b/drivers/acpi/acpica/excreate.c index e7b372d..110711a 100644 --- a/drivers/acpi/acpica/excreate.c +++ b/drivers/acpi/acpica/excreate.c @@ -305,7 +305,8 @@ acpi_ex_create_region(u8 * aml_start, * range */ if ((region_space >= ACPI_NUM_PREDEFINED_REGIONS) && - (region_space < ACPI_USER_REGION_BEGIN)) { + (region_space < ACPI_USER_REGION_BEGIN) && + (region_space != ACPI_ADR_SPACE_DATA_TABLE)) { ACPI_ERROR((AE_INFO, "Invalid AddressSpace type 0x%X", region_space)); return_ACPI_STATUS(AE_AML_INVALID_SPACE_ID); diff --git a/drivers/acpi/acpica/utdecode.c b/drivers/acpi/acpica/utdecode.c index 136a814..97cb36f 100644 --- a/drivers/acpi/acpica/utdecode.c +++ b/drivers/acpi/acpica/utdecode.c @@ -170,8 +170,7 @@ const char *acpi_gbl_region_types[ACPI_NUM_PREDEFINED_REGIONS] = { "SMBus", "SystemCMOS", "PCIBARTarget", - "IPMI", - "DataTable" + "IPMI" }; char *acpi_ut_get_region_name(u8 space_id) @@ -179,6 +178,8 @@ char *acpi_ut_get_region_name(u8 space_id) if (space_id >= ACPI_USER_REGION_BEGIN) { return ("UserDefinedRegion"); + } else if (space_id == ACPI_ADR_SPACE_DATA_TABLE) { + return ("DataTable"); } else if (space_id == ACPI_ADR_SPACE_FIXED_HARDWARE) { return ("FunctionalFixedHW"); } else if (space_id >= ACPI_NUM_PREDEFINED_REGIONS) { diff --git a/include/acpi/actypes.h b/include/acpi/actypes.h index 64f838b..ad77c61 100644 --- a/include/acpi/actypes.h +++ b/include/acpi/actypes.h @@ -712,8 +712,17 @@ typedef u8 acpi_adr_space_type; #define ACPI_ADR_SPACE_CMOS (acpi_adr_space_type) 5 #define ACPI_ADR_SPACE_PCI_BAR_TARGET (acpi_adr_space_type) 6 #define ACPI_ADR_SPACE_IPMI (acpi_adr_space_type) 7 -#define ACPI_ADR_SPACE_DATA_TABLE (acpi_adr_space_type) 8 -#define ACPI_ADR_SPACE_FIXED_HARDWARE (acpi_adr_space_type) 127 + +/* + * Special region types + * + * Note: A Data Table region is a special type of operation region + * that has its own AML opcode. However, internally, the AML + * interpreter simply creates an operation region with an an address + * space type of ACPI_ADR_SPACE_DATA_TABLE. + */ +#define ACPI_ADR_SPACE_DATA_TABLE (acpi_adr_space_type) 0x7E /* Internal to ACPICA only */ +#define ACPI_ADR_SPACE_FIXED_HARDWARE (acpi_adr_space_type) 0x7F /* * bit_register IDs -- cgit v0.10.2 From 07aa99e9df2184e78068f7d5414e29e4a5a1b452 Mon Sep 17 00:00:00 2001 From: Bob Moore Date: Wed, 13 Apr 2011 13:20:49 +0800 Subject: ACPICA: Move ACPI_NUM_PREDEFINED_REGIONS to a more appropriate place Moved to where the predefined regions are actually defined. Signed-off-by: Bob Moore Signed-off-by: Lin Ming Signed-off-by: Len Brown diff --git a/drivers/acpi/acpica/acconfig.h b/drivers/acpi/acpica/acconfig.h index c115bb9..bc533dd 100644 --- a/drivers/acpi/acpica/acconfig.h +++ b/drivers/acpi/acpica/acconfig.h @@ -187,7 +187,6 @@ /* Operation regions */ -#define ACPI_NUM_PREDEFINED_REGIONS 8 #define ACPI_USER_REGION_BEGIN 0x80 /* Maximum space_ids for Operation Regions */ diff --git a/include/acpi/actypes.h b/include/acpi/actypes.h index ad77c61..f3b29fa 100644 --- a/include/acpi/actypes.h +++ b/include/acpi/actypes.h @@ -713,8 +713,10 @@ typedef u8 acpi_adr_space_type; #define ACPI_ADR_SPACE_PCI_BAR_TARGET (acpi_adr_space_type) 6 #define ACPI_ADR_SPACE_IPMI (acpi_adr_space_type) 7 +#define ACPI_NUM_PREDEFINED_REGIONS 8 + /* - * Special region types + * Special Address Spaces * * Note: A Data Table region is a special type of operation region * that has its own AML opcode. However, internally, the AML -- cgit v0.10.2 From e2066ca1b211ff08325c98be9fb8ad95affbaba8 Mon Sep 17 00:00:00 2001 From: Bob Moore Date: Wed, 13 Apr 2011 13:22:04 +0800 Subject: ACPICA: Execute an orphan _REG method under the EC device This change will force the execution of a _REG method underneath the EC device even if there is no corresponding operation region of type EmbeddedControl. Fixes a problem seen on some machines and apparently is compatible with Windows behavior. http://www.acpica.org/bugzilla/show_bug.cgi?id=875 Signed-off-by: Bob Moore Signed-off-by: Lin Ming Signed-off-by: Len Brown diff --git a/drivers/acpi/acpica/evregion.c b/drivers/acpi/acpica/evregion.c index bea7223..f0edf5c 100644 --- a/drivers/acpi/acpica/evregion.c +++ b/drivers/acpi/acpica/evregion.c @@ -55,6 +55,8 @@ static u8 acpi_ev_has_default_handler(struct acpi_namespace_node *node, acpi_adr_space_type space_id); +static void acpi_ev_orphan_ec_reg_method(void); + static acpi_status acpi_ev_reg_run(acpi_handle obj_handle, u32 level, void *context, void **return_value); @@ -561,7 +563,9 @@ acpi_ev_detach_region(union acpi_operand_object *region_obj, /* Now stop region accesses by executing the _REG method */ - status = acpi_ev_execute_reg_method(region_obj, 0); + status = + acpi_ev_execute_reg_method(region_obj, + ACPI_REG_DISCONNECT); if (ACPI_FAILURE(status)) { ACPI_EXCEPTION((AE_INFO, status, "from region _REG, [%s]", @@ -1062,6 +1066,12 @@ acpi_ev_execute_reg_methods(struct acpi_namespace_node *node, ACPI_NS_WALK_UNLOCK, acpi_ev_reg_run, NULL, &space_id, NULL); + /* Special case for EC: handle "orphan" _REG methods with no region */ + + if (space_id == ACPI_ADR_SPACE_EC) { + acpi_ev_orphan_ec_reg_method(); + } + return_ACPI_STATUS(status); } @@ -1120,6 +1130,113 @@ acpi_ev_reg_run(acpi_handle obj_handle, return (AE_OK); } - status = acpi_ev_execute_reg_method(obj_desc, 1); + status = acpi_ev_execute_reg_method(obj_desc, ACPI_REG_CONNECT); return (status); } + +/******************************************************************************* + * + * FUNCTION: acpi_ev_orphan_ec_reg_method + * + * PARAMETERS: None + * + * RETURN: None + * + * DESCRIPTION: Execute an "orphan" _REG method that appears under the EC + * device. This is a _REG method that has no corresponding region + * within the EC device scope. The orphan _REG method appears to + * have been enabled by the description of the ECDT in the ACPI + * specification: "The availability of the region space can be + * detected by providing a _REG method object underneath the + * Embedded Controller device." + * + * To quickly access the EC device, we use the EC_ID that appears + * within the ECDT. Otherwise, we would need to perform a time- + * consuming namespace walk, executing _HID methods to find the + * EC device. + * + ******************************************************************************/ + +static void acpi_ev_orphan_ec_reg_method(void) +{ + struct acpi_table_ecdt *table; + acpi_status status; + struct acpi_object_list args; + union acpi_object objects[2]; + struct acpi_namespace_node *ec_device_node; + struct acpi_namespace_node *reg_method; + struct acpi_namespace_node *next_node; + + ACPI_FUNCTION_TRACE(ev_orphan_ec_reg_method); + + /* Get the ECDT (if present in system) */ + + status = acpi_get_table(ACPI_SIG_ECDT, 0, + ACPI_CAST_INDIRECT_PTR(struct acpi_table_header, + &table)); + if (ACPI_FAILURE(status)) { + return_VOID; + } + + /* We need a valid EC_ID string */ + + if (!(*table->id)) { + return_VOID; + } + + /* Namespace is currently locked, must release */ + + (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); + + /* Get a handle to the EC device referenced in the ECDT */ + + status = acpi_get_handle(NULL, + ACPI_CAST_PTR(char, table->id), + ACPI_CAST_PTR(acpi_handle, &ec_device_node)); + if (ACPI_FAILURE(status)) { + goto exit; + } + + /* Get a handle to a _REG method immediately under the EC device */ + + status = acpi_get_handle(ec_device_node, + METHOD_NAME__REG, ACPI_CAST_PTR(acpi_handle, + ®_method)); + if (ACPI_FAILURE(status)) { + goto exit; + } + + /* + * Execute the _REG method only if there is no Operation Region in + * this scope with the Embedded Controller space ID. Otherwise, it + * will already have been executed. Note, this allows for Regions + * with other space IDs to be present; but the code below will then + * execute the _REG method with the EC space ID argument. + */ + next_node = acpi_ns_get_next_node(ec_device_node, NULL); + while (next_node) { + if ((next_node->type == ACPI_TYPE_REGION) && + (next_node->object) && + (next_node->object->region.space_id == ACPI_ADR_SPACE_EC)) { + goto exit; /* Do not execute _REG */ + } + next_node = acpi_ns_get_next_node(ec_device_node, next_node); + } + + /* Evaluate the _REG(EC,Connect) method */ + + args.count = 2; + args.pointer = objects; + objects[0].type = ACPI_TYPE_INTEGER; + objects[0].integer.value = ACPI_ADR_SPACE_EC; + objects[1].type = ACPI_TYPE_INTEGER; + objects[1].integer.value = ACPI_REG_CONNECT; + + status = acpi_evaluate_object(reg_method, NULL, &args, NULL); + + exit: + /* We ignore all errors from above, don't care */ + + status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE); + return_VOID; +} diff --git a/drivers/acpi/acpica/evrgnini.c b/drivers/acpi/acpica/evrgnini.c index 9659cee..55a5d35 100644 --- a/drivers/acpi/acpica/evrgnini.c +++ b/drivers/acpi/acpica/evrgnini.c @@ -637,7 +637,7 @@ acpi_ev_initialize_region(union acpi_operand_object *region_obj, status = acpi_ev_execute_reg_method - (region_obj, 1); + (region_obj, ACPI_REG_CONNECT); if (acpi_ns_locked) { status = diff --git a/drivers/acpi/acpica/evxfregn.c b/drivers/acpi/acpica/evxfregn.c index c85c8c4..00cd956 100644 --- a/drivers/acpi/acpica/evxfregn.c +++ b/drivers/acpi/acpica/evxfregn.c @@ -130,20 +130,21 @@ acpi_install_address_space_handler(acpi_handle device, case ACPI_ADR_SPACE_PCI_CONFIG: case ACPI_ADR_SPACE_DATA_TABLE: - if (acpi_gbl_reg_methods_executed) { + if (!acpi_gbl_reg_methods_executed) { - /* Run all _REG methods for this address space */ - - status = acpi_ev_execute_reg_methods(node, space_id); + /* We will defer execution of the _REG methods for this space */ + goto unlock_and_exit; } break; default: - - status = acpi_ev_execute_reg_methods(node, space_id); break; } + /* Run all _REG methods for this address space */ + + status = acpi_ev_execute_reg_methods(node, space_id); + unlock_and_exit: (void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE); return_ACPI_STATUS(status); diff --git a/include/acpi/actypes.h b/include/acpi/actypes.h index f3b29fa..a6412b8 100644 --- a/include/acpi/actypes.h +++ b/include/acpi/actypes.h @@ -726,6 +726,11 @@ typedef u8 acpi_adr_space_type; #define ACPI_ADR_SPACE_DATA_TABLE (acpi_adr_space_type) 0x7E /* Internal to ACPICA only */ #define ACPI_ADR_SPACE_FIXED_HARDWARE (acpi_adr_space_type) 0x7F +/* Values for _REG connection code */ + +#define ACPI_REG_DISCONNECT 0 +#define ACPI_REG_CONNECT 1 + /* * bit_register IDs * -- cgit v0.10.2 From 0a63e2308cbbdc7e2f5645769afaf53785bcb9fa Mon Sep 17 00:00:00 2001 From: Bob Moore Date: Fri, 15 Apr 2011 09:12:47 +0800 Subject: ACPICA: Update to version 20110413 Version 20110413 Signed-off-by: Bob Moore Signed-off-by: Lin Ming Signed-off-by: Len Brown diff --git a/include/acpi/acpixf.h b/include/acpi/acpixf.h index f6ad63d..2ed0a84 100644 --- a/include/acpi/acpixf.h +++ b/include/acpi/acpixf.h @@ -47,7 +47,7 @@ /* Current ACPICA subsystem version in YYYYMMDD format */ -#define ACPI_CA_VERSION 0x20110316 +#define ACPI_CA_VERSION 0x20110413 #include "actypes.h" #include "actbl.h" -- cgit v0.10.2 From 534bc4e3d27096e2f3fc00c14a20efd597837a4f Mon Sep 17 00:00:00 2001 From: Zhang Rui Date: Tue, 26 Apr 2011 16:30:02 +0800 Subject: ACPI EC: enable MSI workaround for Quanta laptops Enable MSI workaround for Quanta laptops. https://bugzilla.kernel.org/show_bug.cgi?id=20242 Tested-by: Jan-Matthias Braun Signed-off-by: Zhang Rui Signed-off-by: Len Brown diff --git a/drivers/acpi/ec.c b/drivers/acpi/ec.c index fa848c4..62628e5 100644 --- a/drivers/acpi/ec.c +++ b/drivers/acpi/ec.c @@ -938,6 +938,14 @@ static struct dmi_system_id __initdata ec_dmi_table[] = { ec_flag_msi, "MSI hardware", { DMI_MATCH(DMI_CHASSIS_VENDOR, "MICRO-STAR")}, NULL}, { + ec_flag_msi, "Quanta hardware", { + DMI_MATCH(DMI_SYS_VENDOR, "Quanta"), + DMI_MATCH(DMI_PRODUCT_NAME, "TW8/SW8/DW8"),}, NULL}, + { + ec_flag_msi, "Quanta hardware", { + DMI_MATCH(DMI_SYS_VENDOR, "Quanta"), + DMI_MATCH(DMI_PRODUCT_NAME, "TW9/SW9"),}, NULL}, + { ec_validate_ecdt, "ASUS hardware", { DMI_MATCH(DMI_BIOS_VENDOR, "ASUS") }, NULL}, {}, -- cgit v0.10.2 From aecad432fd68dafa5b3b497c4816fbfce6fd4066 Mon Sep 17 00:00:00 2001 From: Thomas Renninger Date: Thu, 26 May 2011 12:26:23 +0200 Subject: ACPI: Cleanup custom_method debug stuff - Move param aml_debug_output to other params into sysfs.c - Split acpi_debugfs_init to prepare custom_method to be an own .config option and driver. Signed-off-by: Thomas Renninger Acked-by: Rafael J. Wysocki Acked-by: rui.zhang@intel.com Signed-off-by: Len Brown diff --git a/drivers/acpi/debugfs.c b/drivers/acpi/debugfs.c index 384f7ab..e7abc6e 100644 --- a/drivers/acpi/debugfs.c +++ b/drivers/acpi/debugfs.c @@ -12,13 +12,8 @@ #define _COMPONENT ACPI_SYSTEM_COMPONENT ACPI_MODULE_NAME("debugfs"); - -/* /sys/modules/acpi/parameters/aml_debug_output */ - -module_param_named(aml_debug_output, acpi_gbl_enable_aml_debug_object, - bool, 0644); -MODULE_PARM_DESC(aml_debug_output, - "To enable/disable the ACPI Debug Object output."); +struct dentry *acpi_debugfs_dir; +static struct dentry *cm_dentry; /* /sys/kernel/debug/acpi/custom_method */ @@ -80,23 +75,22 @@ static const struct file_operations cm_fops = { .llseek = default_llseek, }; -int __init acpi_debugfs_init(void) +static int __init acpi_custom_method_init(void) { - struct dentry *acpi_dir, *cm_dentry; - - acpi_dir = debugfs_create_dir("acpi", NULL); - if (!acpi_dir) - goto err; + if (!acpi_debugfs_dir) + return -ENOENT; cm_dentry = debugfs_create_file("custom_method", S_IWUSR, - acpi_dir, NULL, &cm_fops); + acpi_debugfs_dir, NULL, &cm_fops); if (!cm_dentry) - goto err; + return -ENODEV; return 0; +} + +void __init acpi_debugfs_init(void) +{ + acpi_debugfs_dir = debugfs_create_dir("acpi", NULL); -err: - if (acpi_dir) - debugfs_remove(acpi_dir); - return -EINVAL; + acpi_custom_method_init(); } diff --git a/drivers/acpi/internal.h b/drivers/acpi/internal.h index 4bfb759..ca75b9c 100644 --- a/drivers/acpi/internal.h +++ b/drivers/acpi/internal.h @@ -28,9 +28,10 @@ int acpi_scan_init(void); int acpi_sysfs_init(void); #ifdef CONFIG_DEBUG_FS +extern struct dentry *acpi_debugfs_dir; int acpi_debugfs_init(void); #else -static inline int acpi_debugfs_init(void) { return 0; } +static inline void acpi_debugfs_init(void) { return; } #endif /* -------------------------------------------------------------------------- diff --git a/drivers/acpi/sysfs.c b/drivers/acpi/sysfs.c index 61891e7..77255f2 100644 --- a/drivers/acpi/sysfs.c +++ b/drivers/acpi/sysfs.c @@ -220,6 +220,14 @@ module_param_call(trace_state, param_set_trace_state, param_get_trace_state, NULL, 0644); #endif /* CONFIG_ACPI_DEBUG */ + +/* /sys/modules/acpi/parameters/aml_debug_output */ + +module_param_named(aml_debug_output, acpi_gbl_enable_aml_debug_object, + bool, 0644); +MODULE_PARM_DESC(aml_debug_output, + "To enable/disable the ACPI Debug Object output."); + /* /sys/module/acpi/parameters/acpica_version */ static int param_get_acpica_version(char *buffer, struct kernel_param *kp) { -- cgit v0.10.2 From 526b4af47f44148c9d665e57723ed9f86634c6e3 Mon Sep 17 00:00:00 2001 From: Thomas Renninger Date: Thu, 26 May 2011 12:26:24 +0200 Subject: ACPI: Split out custom_method functionality into an own driver With /sys/kernel/debug/acpi/custom_method root can write to arbitrary memory and increase his priveleges, even if these are restricted. -> Make this an own debug .config option and warn about the security issue in the config description. -> Still keep acpi/debugfs.c which now only creates an empty /sys/kernel/debug/acpi directory. There might be other users of it later. Signed-off-by: Thomas Renninger Acked-by: Rafael J. Wysocki Acked-by: rui.zhang@intel.com Signed-off-by: Len Brown diff --git a/Documentation/acpi/method-customizing.txt b/Documentation/acpi/method-customizing.txt index 3e1d25a..5f55373 100644 --- a/Documentation/acpi/method-customizing.txt +++ b/Documentation/acpi/method-customizing.txt @@ -66,3 +66,8 @@ Note: We can use a kernel with multiple custom ACPI method running, But each individual write to debugfs can implement a SINGLE method override. i.e. if we want to insert/override multiple ACPI methods, we need to redo step c) ~ g) for multiple times. + +Note: Be aware that root can mis-use this driver to modify arbitrary + memory and gain additional rights, if root's privileges got + restricted (for example if root is not allowed to load additional + modules after boot). diff --git a/drivers/acpi/Kconfig b/drivers/acpi/Kconfig index 3a17ca5..d918e13 100644 --- a/drivers/acpi/Kconfig +++ b/drivers/acpi/Kconfig @@ -380,6 +380,21 @@ config ACPI_HED which is used to report some hardware errors notified via SCI, mainly the corrected errors. +config ACPI_CUSTOM_METHOD + tristate "Allow ACPI methods to be inserted/replaced at run time" + depends on DEBUG_FS + default n + help + This debug facility allows ACPI AML methods to me inserted and/or + replaced without rebooting the system. For details refer to: + Documentation/acpi/method-customizing.txt. + + NOTE: This option is security sensitive, because it allows arbitrary + kernel memory to be written to by root (uid=0) users, allowing them + to bypass certain security measures (e.g. if root is not allowed to + load additional kernel modules after boot, this feature may be used + to override that restriction). + source "drivers/acpi/apei/Kconfig" endif # ACPI diff --git a/drivers/acpi/Makefile b/drivers/acpi/Makefile index d113fa5..cba0b23 100644 --- a/drivers/acpi/Makefile +++ b/drivers/acpi/Makefile @@ -62,6 +62,7 @@ obj-$(CONFIG_ACPI_SBS) += sbs.o obj-$(CONFIG_ACPI_POWER_METER) += power_meter.o obj-$(CONFIG_ACPI_HED) += hed.o obj-$(CONFIG_ACPI_EC_DEBUGFS) += ec_sys.o +obj-$(CONFIG_ACPI_CUSTOM_METHOD)+= custom_method.o # processor has its own "processor." module_param namespace processor-y := processor_driver.o processor_throttling.o diff --git a/drivers/acpi/custom_method.c b/drivers/acpi/custom_method.c new file mode 100644 index 0000000..5d42c24 --- /dev/null +++ b/drivers/acpi/custom_method.c @@ -0,0 +1,100 @@ +/* + * debugfs.c - ACPI debugfs interface to userspace. + */ + +#include +#include +#include +#include +#include +#include + +#include "internal.h" + +#define _COMPONENT ACPI_SYSTEM_COMPONENT +ACPI_MODULE_NAME("custom_method"); +MODULE_LICENSE("GPL"); + +static struct dentry *cm_dentry; + +/* /sys/kernel/debug/acpi/custom_method */ + +static ssize_t cm_write(struct file *file, const char __user * user_buf, + size_t count, loff_t *ppos) +{ + static char *buf; + static u32 max_size; + static u32 uncopied_bytes; + + struct acpi_table_header table; + acpi_status status; + + if (!(*ppos)) { + /* parse the table header to get the table length */ + if (count <= sizeof(struct acpi_table_header)) + return -EINVAL; + if (copy_from_user(&table, user_buf, + sizeof(struct acpi_table_header))) + return -EFAULT; + uncopied_bytes = max_size = table.length; + buf = kzalloc(max_size, GFP_KERNEL); + if (!buf) + return -ENOMEM; + } + + if (buf == NULL) + return -EINVAL; + + if ((*ppos > max_size) || + (*ppos + count > max_size) || + (*ppos + count < count) || + (count > uncopied_bytes)) + return -EINVAL; + + if (copy_from_user(buf + (*ppos), user_buf, count)) { + kfree(buf); + buf = NULL; + return -EFAULT; + } + + uncopied_bytes -= count; + *ppos += count; + + if (!uncopied_bytes) { + status = acpi_install_method(buf); + kfree(buf); + buf = NULL; + if (ACPI_FAILURE(status)) + return -EINVAL; + add_taint(TAINT_OVERRIDDEN_ACPI_TABLE); + } + + return count; +} + +static const struct file_operations cm_fops = { + .write = cm_write, + .llseek = default_llseek, +}; + +static int __init acpi_custom_method_init(void) +{ + if (acpi_debugfs_dir == NULL) + return -ENOENT; + + cm_dentry = debugfs_create_file("custom_method", S_IWUSR, + acpi_debugfs_dir, NULL, &cm_fops); + if (cm_dentry == NULL) + return -ENODEV; + + return 0; +} + +static void __exit acpi_custom_method_exit(void) +{ + if (cm_dentry) + debugfs_remove(cm_dentry); + } + +module_init(acpi_custom_method_init); +module_exit(acpi_custom_method_exit); diff --git a/drivers/acpi/debugfs.c b/drivers/acpi/debugfs.c index e7abc6e..182a9fc 100644 --- a/drivers/acpi/debugfs.c +++ b/drivers/acpi/debugfs.c @@ -3,9 +3,6 @@ */ #include -#include -#include -#include #include #include @@ -13,84 +10,9 @@ ACPI_MODULE_NAME("debugfs"); struct dentry *acpi_debugfs_dir; -static struct dentry *cm_dentry; - -/* /sys/kernel/debug/acpi/custom_method */ - -static ssize_t cm_write(struct file *file, const char __user * user_buf, - size_t count, loff_t *ppos) -{ - static char *buf; - static u32 max_size; - static u32 uncopied_bytes; - - struct acpi_table_header table; - acpi_status status; - - if (!(*ppos)) { - /* parse the table header to get the table length */ - if (count <= sizeof(struct acpi_table_header)) - return -EINVAL; - if (copy_from_user(&table, user_buf, - sizeof(struct acpi_table_header))) - return -EFAULT; - uncopied_bytes = max_size = table.length; - buf = kzalloc(max_size, GFP_KERNEL); - if (!buf) - return -ENOMEM; - } - - if (buf == NULL) - return -EINVAL; - - if ((*ppos > max_size) || - (*ppos + count > max_size) || - (*ppos + count < count) || - (count > uncopied_bytes)) - return -EINVAL; - - if (copy_from_user(buf + (*ppos), user_buf, count)) { - kfree(buf); - buf = NULL; - return -EFAULT; - } - - uncopied_bytes -= count; - *ppos += count; - - if (!uncopied_bytes) { - status = acpi_install_method(buf); - kfree(buf); - buf = NULL; - if (ACPI_FAILURE(status)) - return -EINVAL; - add_taint(TAINT_OVERRIDDEN_ACPI_TABLE); - } - - return count; -} - -static const struct file_operations cm_fops = { - .write = cm_write, - .llseek = default_llseek, -}; - -static int __init acpi_custom_method_init(void) -{ - if (!acpi_debugfs_dir) - return -ENOENT; - - cm_dentry = debugfs_create_file("custom_method", S_IWUSR, - acpi_debugfs_dir, NULL, &cm_fops); - if (!cm_dentry) - return -ENODEV; - - return 0; -} +EXPORT_SYMBOL_GPL(acpi_debugfs_dir); void __init acpi_debugfs_init(void) { acpi_debugfs_dir = debugfs_create_dir("acpi", NULL); - - acpi_custom_method_init(); } -- cgit v0.10.2 From 932df7414336a00f45e5aec62724cf736b0bcfd4 Mon Sep 17 00:00:00 2001 From: Lin Ming Date: Mon, 16 May 2011 09:11:00 +0800 Subject: ACPI: processor: fix processor_physically_present in UP kernel Usually, there are multiple processors defined in ACPI table, for example Scope (_PR) { Processor (CPU0, 0x00, 0x00000410, 0x06) {} Processor (CPU1, 0x01, 0x00000410, 0x06) {} Processor (CPU2, 0x02, 0x00000410, 0x06) {} Processor (CPU3, 0x03, 0x00000410, 0x06) {} } processor_physically_present(...) will be called to check whether those processors are physically present. Currently we have below codes in processor_physically_present, cpuid = acpi_get_cpuid(...); if ((cpuid == -1) && (num_possible_cpus() > 1)) return false; return true; In UP kernel, acpi_get_cpuid(...) always return -1 and num_possible_cpus() always return 1, so processor_physically_present(...) always returns true for all passed in processor handles. This is wrong for UP processor or SMP processor running UP kernel. This patch removes the !SMP version of acpi_get_cpuid(), so both UP and SMP kernel use the same acpi_get_cpuid function. And for UP kernel, only processor 0 is valid. https://bugzilla.kernel.org/show_bug.cgi?id=16548 https://bugzilla.kernel.org/show_bug.cgi?id=16357 Tested-by: Anton Kochkov Tested-by: Ambroz Bizjak Signed-off-by: Lin Ming Signed-off-by: Len Brown diff --git a/drivers/acpi/processor_core.c b/drivers/acpi/processor_core.c index 25bf17d..02d2a4c 100644 --- a/drivers/acpi/processor_core.c +++ b/drivers/acpi/processor_core.c @@ -37,7 +37,6 @@ static struct dmi_system_id __initdata processor_idle_dmi_table[] = { {}, }; -#ifdef CONFIG_SMP static int map_lapic_id(struct acpi_subtable_header *entry, u32 acpi_id, int *apic_id) { @@ -165,7 +164,9 @@ exit: int acpi_get_cpuid(acpi_handle handle, int type, u32 acpi_id) { +#ifdef CONFIG_SMP int i; +#endif int apic_id = -1; apic_id = map_mat_entry(handle, type, acpi_id); @@ -174,14 +175,19 @@ int acpi_get_cpuid(acpi_handle handle, int type, u32 acpi_id) if (apic_id == -1) return apic_id; +#ifdef CONFIG_SMP for_each_possible_cpu(i) { if (cpu_physical_id(i) == apic_id) return i; } +#else + /* In UP kernel, only processor 0 is valid */ + if (apic_id == 0) + return apic_id; +#endif return -1; } EXPORT_SYMBOL_GPL(acpi_get_cpuid); -#endif static bool __init processor_physically_present(acpi_handle handle) { @@ -217,7 +223,7 @@ static bool __init processor_physically_present(acpi_handle handle) type = (acpi_type == ACPI_TYPE_DEVICE) ? 1 : 0; cpuid = acpi_get_cpuid(handle, type, acpi_id); - if ((cpuid == -1) && (num_possible_cpus() > 1)) + if (cpuid == -1) return false; return true; diff --git a/include/acpi/processor.h b/include/acpi/processor.h index 55192ac..ba4928c 100644 --- a/include/acpi/processor.h +++ b/include/acpi/processor.h @@ -310,14 +310,7 @@ static inline int acpi_processor_get_bios_limit(int cpu, unsigned int *limit) /* in processor_core.c */ void acpi_processor_set_pdc(acpi_handle handle); -#ifdef CONFIG_SMP int acpi_get_cpuid(acpi_handle, int type, u32 acpi_id); -#else -static inline int acpi_get_cpuid(acpi_handle handle, int type, u32 acpi_id) -{ - return -1; -} -#endif /* in processor_throttling.c */ int acpi_processor_tstate_has_changed(struct acpi_processor *pr); -- cgit v0.10.2 From 28c2103dad04dba29ba86e22dad5735db8f0e13c Mon Sep 17 00:00:00 2001 From: Lin Ming Date: Wed, 4 May 2011 22:56:43 +0800 Subject: ACPI: Add D3 cold state MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit _SxW returns an Integer containing the lowest D-state supported in state Sx. If OSPM has not indicated that it supports _PR3, then the value “3” corresponds to D3. If it has indicated _PR3 support, the value “3” represents D3hot and the value “4” represents D3cold. Linux does set _OSC._PR3, so we should fix it to expect that _SxW can return 4. Signed-off-by: Lin Ming Acked-by: Jesse Barnes Signed-off-by: Len Brown diff --git a/drivers/acpi/bus.c b/drivers/acpi/bus.c index 9749980..d1e06c1 100644 --- a/drivers/acpi/bus.c +++ b/drivers/acpi/bus.c @@ -227,7 +227,7 @@ static int __acpi_bus_set_power(struct acpi_device *device, int state) acpi_status status = AE_OK; char object_name[5] = { '_', 'P', 'S', '0' + state, '\0' }; - if (!device || (state < ACPI_STATE_D0) || (state > ACPI_STATE_D3)) + if (!device || (state < ACPI_STATE_D0) || (state > ACPI_STATE_D3_COLD)) return -EINVAL; /* Make sure this is a valid target state */ diff --git a/drivers/pci/pci-acpi.c b/drivers/pci/pci-acpi.c index 7c3b18e..d36f41e 100644 --- a/drivers/pci/pci-acpi.c +++ b/drivers/pci/pci-acpi.c @@ -195,6 +195,8 @@ static pci_power_t acpi_pci_choose_state(struct pci_dev *pdev) return PCI_D2; case ACPI_STATE_D3: return PCI_D3hot; + case ACPI_STATE_D3_COLD: + return PCI_D3cold; } return PCI_POWER_ERROR; } diff --git a/include/acpi/actypes.h b/include/acpi/actypes.h index 64f838b..f72cbe5 100644 --- a/include/acpi/actypes.h +++ b/include/acpi/actypes.h @@ -501,8 +501,9 @@ typedef u64 acpi_integer; #define ACPI_STATE_D1 (u8) 1 #define ACPI_STATE_D2 (u8) 2 #define ACPI_STATE_D3 (u8) 3 -#define ACPI_D_STATES_MAX ACPI_STATE_D3 -#define ACPI_D_STATE_COUNT 4 +#define ACPI_STATE_D3_COLD (u8) 4 +#define ACPI_D_STATES_MAX ACPI_STATE_D3_COLD +#define ACPI_D_STATE_COUNT 5 #define ACPI_STATE_C0 (u8) 0 #define ACPI_STATE_C1 (u8) 1 -- cgit v0.10.2 From 08b53f0e6b565fe8dc0b8f929960ed16d76291bd Mon Sep 17 00:00:00 2001 From: Zhang Rui Date: Tue, 26 Apr 2011 16:29:55 +0800 Subject: ACPI EC: remove redundant code ec->handle is set in ec_parse_device(), so don't bother to set it again. Signed-off-by: Zhang Rui Signed-off-by: Len Brown diff --git a/drivers/acpi/ec.c b/drivers/acpi/ec.c index b3f1d6f..ed8cf17 100644 --- a/drivers/acpi/ec.c +++ b/drivers/acpi/ec.c @@ -804,8 +804,6 @@ static int acpi_ec_add(struct acpi_device *device) return -EINVAL; } - ec->handle = device->handle; - /* Find and register all query methods */ acpi_walk_namespace(ACPI_TYPE_METHOD, ec->handle, 1, acpi_ec_register_query_methods, NULL, ec, NULL); -- cgit v0.10.2