diff options
author | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2013-04-28 01:53:34 +0200 |
---|---|---|
committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2013-04-28 01:53:34 +0200 |
commit | 929c6dd4195f6b4daf9887da34b3d7fbd0f2e2f5 (patch) | |
tree | 1eb36e31b2e3ca5a747d86689b9fa92dec227272 /drivers/acpi | |
parent | 60d509fa6a9c4653a86ad830e4c4b30360b23f0e (diff) | |
parent | fd4655c259fa91b3b207345eb7b4d9faa1b6bc8d (diff) |
Merge branch 'acpi-hotplug'
* acpi-hotplug:
ACPI / memhotplug: Remove info->failed bit
ACPI / memhotplug: set info->enabled for memory present at boot time
ACPI: Verify device status after eject
acpi: remove reference to ACPI_HOTPLUG_IO
ACPI: Update _OST handling for notify
ACPI: Update PNPID match handling for notify
ACPI: Update PNPID set/free interfaces
ACPI: Remove acpi_device dependency in acpi_device_set_id()
ACPI / hotplug: Make acpi_hotplug_profile_ktype static
ACPI / scan: Make memory hotplug driver use struct acpi_scan_handler
ACPI / container: Use hotplug profile user space interface
ACPI / hotplug: Introduce user space interface for hotplug profiles
ACPI / scan: Introduce acpi_scan_handler_matching()
ACPI / container: Use common hotplug code
ACPI / scan: Introduce common code for ACPI-based device hotplug
ACPI / scan: Introduce acpi_scan_match_handler()
Diffstat (limited to 'drivers/acpi')
-rw-r--r-- | drivers/acpi/Kconfig | 5 | ||||
-rw-r--r-- | drivers/acpi/acpi_memhotplug.c | 328 | ||||
-rw-r--r-- | drivers/acpi/container.c | 150 | ||||
-rw-r--r-- | drivers/acpi/internal.h | 13 | ||||
-rw-r--r-- | drivers/acpi/power.c | 2 | ||||
-rw-r--r-- | drivers/acpi/scan.c | 530 | ||||
-rw-r--r-- | drivers/acpi/sysfs.c | 66 | ||||
-rw-r--r-- | drivers/acpi/video_detect.c | 25 |
8 files changed, 538 insertions, 581 deletions
diff --git a/drivers/acpi/Kconfig b/drivers/acpi/Kconfig index 4bf68c8d4797..8fcae6df0a42 100644 --- a/drivers/acpi/Kconfig +++ b/drivers/acpi/Kconfig @@ -334,7 +334,7 @@ config X86_PM_TIMER config ACPI_CONTAINER bool "Container and Module Devices" - default (ACPI_HOTPLUG_MEMORY || ACPI_HOTPLUG_CPU || ACPI_HOTPLUG_IO) + default (ACPI_HOTPLUG_MEMORY || ACPI_HOTPLUG_CPU) help This driver supports ACPI Container and Module devices (IDs ACPI0004, PNP0A05, and PNP0A06). @@ -345,9 +345,8 @@ config ACPI_CONTAINER the module will be called container. config ACPI_HOTPLUG_MEMORY - tristate "Memory Hotplug" + bool "Memory Hotplug" depends on MEMORY_HOTPLUG - default n help This driver supports ACPI memory hotplug. The driver fields notifications on ACPI memory devices (PNP0C80), diff --git a/drivers/acpi/acpi_memhotplug.c b/drivers/acpi/acpi_memhotplug.c index da1f82b445e0..5e6301e94920 100644 --- a/drivers/acpi/acpi_memhotplug.c +++ b/drivers/acpi/acpi_memhotplug.c @@ -1,5 +1,7 @@ /* - * Copyright (C) 2004 Intel Corporation <naveen.b.s@intel.com> + * Copyright (C) 2004, 2013 Intel Corporation + * Author: Naveen B S <naveen.b.s@intel.com> + * Author: Rafael J. Wysocki <rafael.j.wysocki@intel.com> * * All rights reserved. * @@ -25,14 +27,10 @@ * ranges. */ -#include <linux/kernel.h> -#include <linux/module.h> -#include <linux/init.h> -#include <linux/types.h> -#include <linux/memory_hotplug.h> -#include <linux/slab.h> #include <linux/acpi.h> -#include <acpi/acpi_drivers.h> +#include <linux/memory_hotplug.h> + +#include "internal.h" #define ACPI_MEMORY_DEVICE_CLASS "memory" #define ACPI_MEMORY_DEVICE_HID "PNP0C80" @@ -44,32 +42,28 @@ #define PREFIX "ACPI:memory_hp:" ACPI_MODULE_NAME("acpi_memhotplug"); -MODULE_AUTHOR("Naveen B S <naveen.b.s@intel.com>"); -MODULE_DESCRIPTION("Hotplug Mem Driver"); -MODULE_LICENSE("GPL"); /* Memory Device States */ #define MEMORY_INVALID_STATE 0 #define MEMORY_POWER_ON_STATE 1 #define MEMORY_POWER_OFF_STATE 2 -static int acpi_memory_device_add(struct acpi_device *device); -static int acpi_memory_device_remove(struct acpi_device *device); +static int acpi_memory_device_add(struct acpi_device *device, + const struct acpi_device_id *not_used); +static void acpi_memory_device_remove(struct acpi_device *device); static const struct acpi_device_id memory_device_ids[] = { {ACPI_MEMORY_DEVICE_HID, 0}, {"", 0}, }; -MODULE_DEVICE_TABLE(acpi, memory_device_ids); -static struct acpi_driver acpi_memory_device_driver = { - .name = "acpi_memhotplug", - .class = ACPI_MEMORY_DEVICE_CLASS, +static struct acpi_scan_handler memory_device_handler = { .ids = memory_device_ids, - .ops = { - .add = acpi_memory_device_add, - .remove = acpi_memory_device_remove, - }, + .attach = acpi_memory_device_add, + .detach = acpi_memory_device_remove, + .hotplug = { + .enabled = true, + }, }; struct acpi_memory_info { @@ -79,7 +73,6 @@ struct acpi_memory_info { unsigned short caching; /* memory cache attribute */ unsigned short write_protect; /* memory read/write attribute */ unsigned int enabled:1; - unsigned int failed:1; }; struct acpi_memory_device { @@ -153,48 +146,6 @@ acpi_memory_get_device_resources(struct acpi_memory_device *mem_device) return 0; } -static int acpi_memory_get_device(acpi_handle handle, - struct acpi_memory_device **mem_device) -{ - struct acpi_device *device = NULL; - int result = 0; - - acpi_scan_lock_acquire(); - - acpi_bus_get_device(handle, &device); - if (device) - goto end; - - /* - * Now add the notified device. This creates the acpi_device - * and invokes .add function - */ - result = acpi_bus_scan(handle); - if (result) { - acpi_handle_warn(handle, "ACPI namespace scan failed\n"); - result = -EINVAL; - goto out; - } - result = acpi_bus_get_device(handle, &device); - if (result) { - acpi_handle_warn(handle, "Missing device object\n"); - result = -EINVAL; - goto out; - } - - end: - *mem_device = acpi_driver_data(device); - if (!(*mem_device)) { - dev_err(&device->dev, "driver data not found\n"); - result = -ENODEV; - goto out; - } - - out: - acpi_scan_lock_release(); - return result; -} - static int acpi_memory_check_device(struct acpi_memory_device *mem_device) { unsigned long long current_status; @@ -249,13 +200,11 @@ static int acpi_memory_enable_device(struct acpi_memory_device *mem_device) * returns -EEXIST. If add_memory() returns the other error, it * means that this memory block is not used by the kernel. */ - if (result && result != -EEXIST) { - info->failed = 1; + if (result && result != -EEXIST) continue; - } - if (!result) - info->enabled = 1; + info->enabled = 1; + /* * Add num_enable even if add_memory() returns -EEXIST, so the * device is bound to this driver. @@ -286,16 +235,8 @@ static int acpi_memory_remove_memory(struct acpi_memory_device *mem_device) nid = acpi_get_node(mem_device->device->handle); list_for_each_entry_safe(info, n, &mem_device->res_list, list) { - if (info->failed) - /* The kernel does not use this memory block */ - continue; - if (!info->enabled) - /* - * The kernel uses this memory block, but it may be not - * managed by us. - */ - return -EBUSY; + continue; if (nid < 0) nid = memory_add_physaddr_to_nid(info->start_addr); @@ -310,95 +251,21 @@ static int acpi_memory_remove_memory(struct acpi_memory_device *mem_device) return result; } -static void acpi_memory_device_notify(acpi_handle handle, u32 event, void *data) -{ - struct acpi_memory_device *mem_device; - struct acpi_device *device; - struct acpi_eject_event *ej_event = NULL; - u32 ost_code = ACPI_OST_SC_NON_SPECIFIC_FAILURE; /* default */ - acpi_status status; - - switch (event) { - case ACPI_NOTIFY_BUS_CHECK: - ACPI_DEBUG_PRINT((ACPI_DB_INFO, - "\nReceived BUS CHECK notification for device\n")); - /* Fall Through */ - case ACPI_NOTIFY_DEVICE_CHECK: - if (event == ACPI_NOTIFY_DEVICE_CHECK) - ACPI_DEBUG_PRINT((ACPI_DB_INFO, - "\nReceived DEVICE CHECK notification for device\n")); - if (acpi_memory_get_device(handle, &mem_device)) { - acpi_handle_err(handle, "Cannot find driver data\n"); - break; - } - - ost_code = ACPI_OST_SC_SUCCESS; - break; - - case ACPI_NOTIFY_EJECT_REQUEST: - ACPI_DEBUG_PRINT((ACPI_DB_INFO, - "\nReceived EJECT REQUEST notification for device\n")); - - status = AE_ERROR; - acpi_scan_lock_acquire(); - - if (acpi_bus_get_device(handle, &device)) { - acpi_handle_err(handle, "Device doesn't exist\n"); - goto unlock; - } - mem_device = acpi_driver_data(device); - if (!mem_device) { - acpi_handle_err(handle, "Driver Data is NULL\n"); - goto unlock; - } - - ej_event = kmalloc(sizeof(*ej_event), GFP_KERNEL); - if (!ej_event) { - pr_err(PREFIX "No memory, dropping EJECT\n"); - goto unlock; - } - - get_device(&device->dev); - ej_event->device = device; - ej_event->event = ACPI_NOTIFY_EJECT_REQUEST; - /* The eject is carried out asynchronously. */ - status = acpi_os_hotplug_execute(acpi_bus_hot_remove_device, - ej_event); - if (ACPI_FAILURE(status)) { - put_device(&device->dev); - kfree(ej_event); - } - - unlock: - acpi_scan_lock_release(); - if (ACPI_SUCCESS(status)) - return; - default: - ACPI_DEBUG_PRINT((ACPI_DB_INFO, - "Unsupported event [0x%x]\n", event)); - - /* non-hotplug event; possibly handled by other handler */ - return; - } - - /* Inform firmware that the hotplug operation has completed */ - (void) acpi_evaluate_hotplug_ost(handle, event, ost_code, NULL); -} - static void acpi_memory_device_free(struct acpi_memory_device *mem_device) { if (!mem_device) return; acpi_memory_free_device_resources(mem_device); + mem_device->device->driver_data = NULL; kfree(mem_device); } -static int acpi_memory_device_add(struct acpi_device *device) +static int acpi_memory_device_add(struct acpi_device *device, + const struct acpi_device_id *not_used) { + struct acpi_memory_device *mem_device; int result; - struct acpi_memory_device *mem_device = NULL; - if (!device) return -EINVAL; @@ -423,147 +290,36 @@ static int acpi_memory_device_add(struct acpi_device *device) /* Set the device state */ mem_device->state = MEMORY_POWER_ON_STATE; - pr_debug("%s\n", acpi_device_name(device)); + result = acpi_memory_check_device(mem_device); + if (result) { + acpi_memory_device_free(mem_device); + return 0; + } - if (!acpi_memory_check_device(mem_device)) { - /* call add_memory func */ - result = acpi_memory_enable_device(mem_device); - if (result) { - dev_err(&device->dev, - "Error in acpi_memory_enable_device\n"); - acpi_memory_device_free(mem_device); - } + result = acpi_memory_enable_device(mem_device); + if (result) { + dev_err(&device->dev, "acpi_memory_enable_device() error\n"); + acpi_memory_device_free(mem_device); + return -ENODEV; } - return result; + + dev_dbg(&device->dev, "Memory device configured by ACPI\n"); + return 1; } -static int acpi_memory_device_remove(struct acpi_device *device) +static void acpi_memory_device_remove(struct acpi_device *device) { - struct acpi_memory_device *mem_device = NULL; - int result; + struct acpi_memory_device *mem_device; if (!device || !acpi_driver_data(device)) - return -EINVAL; + return; mem_device = acpi_driver_data(device); - - result = acpi_memory_remove_memory(mem_device); - if (result) - return result; - + acpi_memory_remove_memory(mem_device); acpi_memory_device_free(mem_device); - - return 0; -} - -/* - * Helper function to check for memory device - */ -static acpi_status is_memory_device(acpi_handle handle) -{ - char *hardware_id; - acpi_status status; - struct acpi_device_info *info; - - status = acpi_get_object_info(handle, &info); - if (ACPI_FAILURE(status)) - return status; - - if (!(info->valid & ACPI_VALID_HID)) { - kfree(info); - return AE_ERROR; - } - - hardware_id = info->hardware_id.string; - if ((hardware_id == NULL) || - (strcmp(hardware_id, ACPI_MEMORY_DEVICE_HID))) - status = AE_ERROR; - - kfree(info); - return status; -} - -static acpi_status -acpi_memory_register_notify_handler(acpi_handle handle, - u32 level, void *ctxt, void **retv) -{ - acpi_status status; - - - status = is_memory_device(handle); - if (ACPI_FAILURE(status)) - return AE_OK; /* continue */ - - status = acpi_install_notify_handler(handle, ACPI_SYSTEM_NOTIFY, - acpi_memory_device_notify, NULL); - /* continue */ - return AE_OK; -} - -static acpi_status -acpi_memory_deregister_notify_handler(acpi_handle handle, - u32 level, void *ctxt, void **retv) -{ - acpi_status status; - - - status = is_memory_device(handle); - if (ACPI_FAILURE(status)) - return AE_OK; /* continue */ - - status = acpi_remove_notify_handler(handle, - ACPI_SYSTEM_NOTIFY, - acpi_memory_device_notify); - - return AE_OK; /* continue */ -} - -static int __init acpi_memory_device_init(void) -{ - int result; - acpi_status status; - - - result = acpi_bus_register_driver(&acpi_memory_device_driver); - - if (result < 0) - return -ENODEV; - - status = acpi_walk_namespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT, - ACPI_UINT32_MAX, - acpi_memory_register_notify_handler, NULL, - NULL, NULL); - - if (ACPI_FAILURE(status)) { - ACPI_EXCEPTION((AE_INFO, status, "walk_namespace failed")); - acpi_bus_unregister_driver(&acpi_memory_device_driver); - return -ENODEV; - } - - return 0; } -static void __exit acpi_memory_device_exit(void) +void __init acpi_memory_hotplug_init(void) { - acpi_status status; - - - /* - * Adding this to un-install notification handlers for all the device - * handles. - */ - status = acpi_walk_namespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT, - ACPI_UINT32_MAX, - acpi_memory_deregister_notify_handler, NULL, - NULL, NULL); - - if (ACPI_FAILURE(status)) - ACPI_EXCEPTION((AE_INFO, status, "walk_namespace failed")); - - acpi_bus_unregister_driver(&acpi_memory_device_driver); - - return; + acpi_scan_add_handler_with_hotplug(&memory_device_handler, "memory"); } - -module_init(acpi_memory_device_init); -module_exit(acpi_memory_device_exit); diff --git a/drivers/acpi/container.c b/drivers/acpi/container.c index 5523ba7d764d..f9f8a08827fa 100644 --- a/drivers/acpi/container.c +++ b/drivers/acpi/container.c @@ -1,12 +1,12 @@ /* - * acpi_container.c - ACPI Generic Container Driver - * ($Revision: ) + * container.c - ACPI Generic Container Driver * * Copyright (C) 2004 Anil S Keshavamurthy (anil.s.keshavamurthy@intel.com) * Copyright (C) 2004 Keiichiro Tokunaga (tokunaga.keiich@jp.fujitsu.com) * Copyright (C) 2004 Motoyuki Ito (motoyuki@soft.fujitsu.com) - * Copyright (C) 2004 Intel Corp. * Copyright (C) 2004 FUJITSU LIMITED + * Copyright (C) 2004, 2013 Intel Corp. + * Author: Rafael J. Wysocki <rafael.j.wysocki@intel.com> * * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ * @@ -26,14 +26,9 @@ * * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ */ -#include <linux/kernel.h> -#include <linux/module.h> -#include <linux/init.h> -#include <linux/slab.h> -#include <linux/types.h> #include <linux/acpi.h> -#include <acpi/acpi_bus.h> -#include <acpi/acpi_drivers.h> + +#include "internal.h" #define PREFIX "ACPI: " @@ -50,141 +45,20 @@ static const struct acpi_device_id container_device_ids[] = { static int container_device_attach(struct acpi_device *device, const struct acpi_device_id *not_used) { - /* - * FIXME: This is necessary, so that acpi_eject_store() doesn't return - * -ENODEV for containers. - */ + /* This is necessary for container hotplug to work. */ return 1; } -static struct acpi_scan_handler container_device_handler = { +static struct acpi_scan_handler container_handler = { .ids = container_device_ids, .attach = container_device_attach, + .hotplug = { + .enabled = true, + .mode = AHM_CONTAINER, + }, }; -static int is_device_present(acpi_handle handle) -{ - acpi_handle temp; - acpi_status status; - unsigned long long sta; - - - status = acpi_get_handle(handle, "_STA", &temp); - if (ACPI_FAILURE(status)) - return 1; /* _STA not found, assume device present */ - - status = acpi_evaluate_integer(handle, "_STA", NULL, &sta); - if (ACPI_FAILURE(status)) - return 0; /* Firmware error */ - - return ((sta & ACPI_STA_DEVICE_PRESENT) == ACPI_STA_DEVICE_PRESENT); -} - -static void container_notify_cb(acpi_handle handle, u32 type, void *context) -{ - struct acpi_device *device = NULL; - int result; - int present; - acpi_status status; - u32 ost_code = ACPI_OST_SC_NON_SPECIFIC_FAILURE; /* default */ - - acpi_scan_lock_acquire(); - - switch (type) { - case ACPI_NOTIFY_BUS_CHECK: - /* Fall through */ - case ACPI_NOTIFY_DEVICE_CHECK: - pr_debug("Container driver received %s event\n", - (type == ACPI_NOTIFY_BUS_CHECK) ? - "ACPI_NOTIFY_BUS_CHECK" : "ACPI_NOTIFY_DEVICE_CHECK"); - - present = is_device_present(handle); - status = acpi_bus_get_device(handle, &device); - if (!present) { - if (ACPI_SUCCESS(status)) { - /* device exist and this is a remove request */ - device->flags.eject_pending = 1; - kobject_uevent(&device->dev.kobj, KOBJ_OFFLINE); - goto out; - } - break; - } - - if (!ACPI_FAILURE(status) || device) - break; - - result = acpi_bus_scan(handle); - if (result) { - acpi_handle_warn(handle, "Failed to add container\n"); - break; - } - result = acpi_bus_get_device(handle, &device); - if (result) { - acpi_handle_warn(handle, "Missing device object\n"); - break; - } - - kobject_uevent(&device->dev.kobj, KOBJ_ONLINE); - ost_code = ACPI_OST_SC_SUCCESS; - break; - - case ACPI_NOTIFY_EJECT_REQUEST: - if (!acpi_bus_get_device(handle, &device) && device) { - device->flags.eject_pending = 1; - kobject_uevent(&device->dev.kobj, KOBJ_OFFLINE); - goto out; - } - break; - - default: - /* non-hotplug event; possibly handled by other handler */ - goto out; - } - - /* Inform firmware that the hotplug operation has completed */ - (void) acpi_evaluate_hotplug_ost(handle, type, ost_code, NULL); - - out: - acpi_scan_lock_release(); -} - -static bool is_container(acpi_handle handle) -{ - struct acpi_device_info *info; - bool ret = false; - - if (ACPI_FAILURE(acpi_get_object_info(handle, &info))) - return false; - - if (info->valid & ACPI_VALID_HID) { - const struct acpi_device_id *id; - - for (id = container_device_ids; id->id[0]; id++) { - ret = !strcmp((char *)id->id, info->hardware_id.string); - if (ret) - break; - } - } - kfree(info); - return ret; -} - -static acpi_status acpi_container_register_notify_handler(acpi_handle handle, - u32 lvl, void *ctxt, - void **retv) -{ - if (is_container(handle)) - acpi_install_notify_handler(handle, ACPI_SYSTEM_NOTIFY, - container_notify_cb, NULL); - - return AE_OK; -} - void __init acpi_container_init(void) { - acpi_walk_namespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT, ACPI_UINT32_MAX, - acpi_container_register_notify_handler, NULL, - NULL, NULL); - - acpi_scan_add_handler(&container_device_handler); + acpi_scan_add_handler_with_hotplug(&container_handler, "container"); } diff --git a/drivers/acpi/internal.h b/drivers/acpi/internal.h index 3c94a732b4b3..7f094adfe05a 100644 --- a/drivers/acpi/internal.h +++ b/drivers/acpi/internal.h @@ -41,6 +41,17 @@ void acpi_container_init(void); #else static inline void acpi_container_init(void) {} #endif +#ifdef CONFIG_ACPI_HOTPLUG_MEMORY +void acpi_memory_hotplug_init(void); +#else +static inline void acpi_memory_hotplug_init(void) {} +#endif + +void acpi_sysfs_add_hotplug_profile(struct acpi_hotplug_profile *hotplug, + const char *name); +int acpi_scan_add_handler_with_hotplug(struct acpi_scan_handler *handler, + const char *hotplug_profile_name); +void acpi_scan_hotplug_enabled(struct acpi_hotplug_profile *hotplug, bool val); #ifdef CONFIG_DEBUG_FS extern struct dentry *acpi_debugfs_dir; @@ -60,7 +71,7 @@ int acpi_device_add(struct acpi_device *device, void acpi_init_device_object(struct acpi_device *device, acpi_handle handle, int type, unsigned long long sta); void acpi_device_add_finalize(struct acpi_device *device); -void acpi_free_ids(struct acpi_device *device); +void acpi_free_pnp_ids(struct acpi_device_pnp *pnp); /* -------------------------------------------------------------------------- Power Resource diff --git a/drivers/acpi/power.c b/drivers/acpi/power.c index 34f5ef11d427..0481b1b1d2aa 100644 --- a/drivers/acpi/power.c +++ b/drivers/acpi/power.c @@ -824,7 +824,7 @@ static void acpi_release_power_resource(struct device *dev) list_del(&resource->list_node); mutex_unlock(&power_resource_list_lock); - acpi_free_ids(device); + acpi_free_pnp_ids(&device->pnp); kfree(resource); } diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c index 5e7e991717d7..8cacc16af6e7 100644 --- a/drivers/acpi/scan.c +++ b/drivers/acpi/scan.c @@ -63,6 +63,19 @@ int acpi_scan_add_handler(struct acpi_scan_handler *handler) return 0; } +int acpi_scan_add_handler_with_hotplug(struct acpi_scan_handler *handler, + const char *hotplug_profile_name) +{ + int error; + + error = acpi_scan_add_handler(handler); + if (error) + return error; + + acpi_sysfs_add_hotplug_profile(&handler->hotplug, hotplug_profile_name); + return 0; +} + /* * Creates hid/cid(s) string needed for modalias and uevent * e.g. on a device with hid:IBM0001 and cid:ACPI0001 you get: @@ -107,32 +120,20 @@ acpi_device_modalias_show(struct device *dev, struct device_attribute *attr, cha } static DEVICE_ATTR(modalias, 0444, acpi_device_modalias_show, NULL); -/** - * acpi_bus_hot_remove_device: hot-remove a device and its children - * @context: struct acpi_eject_event pointer (freed in this func) - * - * Hot-remove a device and its children. This function frees up the - * memory space passed by arg context, so that the caller may call - * this function asynchronously through acpi_os_hotplug_execute(). - */ -void acpi_bus_hot_remove_device(void *context) +static int acpi_scan_hot_remove(struct acpi_device *device) { - struct acpi_eject_event *ej_event = context; - struct acpi_device *device = ej_event->device; acpi_handle handle = device->handle; - acpi_handle temp; + acpi_handle not_used; struct acpi_object_list arg_list; union acpi_object arg; - acpi_status status = AE_OK; - u32 ost_code = ACPI_OST_SC_NON_SPECIFIC_FAILURE; /* default */ - - mutex_lock(&acpi_scan_lock); + acpi_status status; + unsigned long long sta; /* If there is no handle, the device node has been unregistered. */ - if (!device->handle) { + if (!handle) { dev_dbg(&device->dev, "ACPI handle missing\n"); put_device(&device->dev); - goto out; + return -EINVAL; } ACPI_DEBUG_PRINT((ACPI_DB_INFO, @@ -143,7 +144,7 @@ void acpi_bus_hot_remove_device(void *context) put_device(&device->dev); device = NULL; - if (ACPI_SUCCESS(acpi_get_handle(handle, "_LCK", &temp))) { + if (ACPI_SUCCESS(acpi_get_handle(handle, "_LCK", ¬_used))) { arg_list.count = 1; arg_list.pointer = &arg; arg.type = ACPI_TYPE_INTEGER; @@ -161,18 +162,205 @@ void acpi_bus_hot_remove_device(void *context) */ status = acpi_evaluate_object(handle, "_EJ0", &arg_list, NULL); if (ACPI_FAILURE(status)) { - if (status != AE_NOT_FOUND) - acpi_handle_warn(handle, "Eject failed\n"); + if (status == AE_NOT_FOUND) { + return -ENODEV; + } else { + acpi_handle_warn(handle, "Eject failed (0x%x)\n", + status); + return -EIO; + } + } - /* Tell the firmware the hot-remove operation has failed. */ - acpi_evaluate_hotplug_ost(handle, ej_event->event, - ost_code, NULL); + /* + * Verify if eject was indeed successful. If not, log an error + * message. No need to call _OST since _EJ0 call was made OK. + */ + status = acpi_evaluate_integer(handle, "_STA", NULL, &sta); + if (ACPI_FAILURE(status)) { + acpi_handle_warn(handle, + "Status check after eject failed (0x%x)\n", status); + } else if (sta & ACPI_STA_DEVICE_ENABLED) { + acpi_handle_warn(handle, + "Eject incomplete - status 0x%llx\n", sta); + } + + return 0; +} + +static void acpi_bus_device_eject(void *context) +{ + acpi_handle handle = context; + struct acpi_device *device = NULL; + struct acpi_scan_handler *handler; + u32 ost_code = ACPI_OST_SC_NON_SPECIFIC_FAILURE; + + mutex_lock(&acpi_scan_lock); + + acpi_bus_get_device(handle, &device); + if (!device) + goto err_out; + + handler = device->handler; + if (!handler || !handler->hotplug.enabled) { + ost_code = ACPI_OST_SC_EJECT_NOT_SUPPORTED; + goto err_out; + } + acpi_evaluate_hotplug_ost(handle, ACPI_NOTIFY_EJECT_REQUEST, + ACPI_OST_SC_EJECT_IN_PROGRESS, NULL); + if (handler->hotplug.mode == AHM_CONTAINER) { + device->flags.eject_pending = true; + kobject_uevent(&device->dev.kobj, KOBJ_OFFLINE); + } else { + int error; + + get_device(&device->dev); + error = acpi_scan_hot_remove(device); + if (error) + goto err_out; } out: mutex_unlock(&acpi_scan_lock); - kfree(context); return; + + err_out: + acpi_evaluate_hotplug_ost(handle, ACPI_NOTIFY_EJECT_REQUEST, ost_code, + NULL); + goto out; +} + +static void acpi_scan_bus_device_check(acpi_handle handle, u32 ost_source) +{ + struct acpi_device *device = NULL; + u32 ost_code = ACPI_OST_SC_NON_SPECIFIC_FAILURE; + int error; + + mutex_lock(&acpi_scan_lock); + + acpi_bus_get_device(handle, &device); + if (device) { + dev_warn(&device->dev, "Attempt to re-insert\n"); + goto out; + } + acpi_evaluate_hotplug_ost(handle, ost_source, + ACPI_OST_SC_INSERT_IN_PROGRESS, NULL); + error = acpi_bus_scan(handle); + if (error) { + acpi_handle_warn(handle, "Namespace scan failure\n"); + goto out; + } + error = acpi_bus_get_device(handle, &device); + if (error) { + acpi_handle_warn(handle, "Missing device node object\n"); + goto out; + } + ost_code = ACPI_OST_SC_SUCCESS; + if (device->handler && device->handler->hotplug.mode == AHM_CONTAINER) + kobject_uevent(&device->dev.kobj, KOBJ_ONLINE); + + out: + acpi_evaluate_hotplug_ost(handle, ost_source, ost_code, NULL); + mutex_unlock(&acpi_scan_lock); +} + +static void acpi_scan_bus_check(void *context) +{ + acpi_scan_bus_device_check((acpi_handle)context, + ACPI_NOTIFY_BUS_CHECK); +} + +static void acpi_scan_device_check(void *context) +{ + acpi_scan_bus_device_check((acpi_handle)context, + ACPI_NOTIFY_DEVICE_CHECK); +} + +static void acpi_hotplug_unsupported(acpi_handle handle, u32 type) +{ + u32 ost_status; + + switch (type) { + case ACPI_NOTIFY_BUS_CHECK: + acpi_handle_debug(handle, + "ACPI_NOTIFY_BUS_CHECK event: unsupported\n"); + ost_status = ACPI_OST_SC_INSERT_NOT_SUPPORTED; + break; + case ACPI_NOTIFY_DEVICE_CHECK: + acpi_handle_debug(handle, + "ACPI_NOTIFY_DEVICE_CHECK event: unsupported\n"); + ost_status = ACPI_OST_SC_INSERT_NOT_SUPPORTED; + break; + case ACPI_NOTIFY_EJECT_REQUEST: + acpi_handle_debug(handle, + "ACPI_NOTIFY_EJECT_REQUEST event: unsupported\n"); + ost_status = ACPI_OST_SC_EJECT_NOT_SUPPORTED; + break; + default: + /* non-hotplug event; possibly handled by other handler */ + return; + } + + acpi_evaluate_hotplug_ost(handle, type, ost_status, NULL); +} + +static void acpi_hotplug_notify_cb(acpi_handle handle, u32 type, void *data) +{ + acpi_osd_exec_callback callback; + struct acpi_scan_handler *handler = data; + acpi_status status; + + if (!handler->hotplug.enabled) + return acpi_hotplug_unsupported(handle, type); + + switch (type) { + case ACPI_NOTIFY_BUS_CHECK: + acpi_handle_debug(handle, "ACPI_NOTIFY_BUS_CHECK event\n"); + callback = acpi_scan_bus_check; + break; + case ACPI_NOTIFY_DEVICE_CHECK: + acpi_handle_debug(handle, "ACPI_NOTIFY_DEVICE_CHECK event\n"); + callback = acpi_scan_device_check; + break; + case ACPI_NOTIFY_EJECT_REQUEST: + acpi_handle_debug(handle, "ACPI_NOTIFY_EJECT_REQUEST event\n"); + callback = acpi_bus_device_eject; + break; + default: + /* non-hotplug event; possibly handled by other handler */ + return; + } + status = acpi_os_hotplug_execute(callback, handle); + if (ACPI_FAILURE(status)) + acpi_evaluate_hotplug_ost(handle, type, + ACPI_OST_SC_NON_SPECIFIC_FAILURE, + NULL); +} + +/** + * acpi_bus_hot_remove_device: hot-remove a device and its children + * @context: struct acpi_eject_event pointer (freed in this func) + * + * Hot-remove a device and its children. This function frees up the + * memory space passed by arg context, so that the caller may call + * this function asynchronously through acpi_os_hotplug_execute(). + */ +void acpi_bus_hot_remove_device(void *context) +{ + struct acpi_eject_event *ej_event = context; + struct acpi_device *device = ej_event->device; + acpi_handle handle = device->handle; + int error; + + mutex_lock(&acpi_scan_lock); + + error = acpi_scan_hot_remove(device); + if (error && handle) + acpi_evaluate_hotplug_ost(handle, ej_event->event, + ACPI_OST_SC_NON_SPECIFIC_FAILURE, + NULL); + + mutex_unlock(&acpi_scan_lock); + kfree(context); } EXPORT_SYMBOL(acpi_bus_hot_remove_device); @@ -206,51 +394,61 @@ static ssize_t acpi_eject_store(struct device *d, struct device_attribute *attr, const char *buf, size_t count) { - int ret = count; - acpi_status status; - acpi_object_type type = 0; struct acpi_device *acpi_device = to_acpi_device(d); struct acpi_eject_event *ej_event; + acpi_object_type not_used; + acpi_status status; + u32 ost_source; + int ret; - if ((!count) || (buf[0] != '1')) { + if (!count || buf[0] != '1') return -EINVAL; - } - if (!acpi_device->driver && !acpi_device->handler) { - ret = -ENODEV; - goto err; - } - status = acpi_get_type(acpi_device->handle, &type); - if (ACPI_FAILURE(status) || (!acpi_device->flags.ejectable)) { - ret = -ENODEV; - goto err; - } - ej_event = kmalloc(sizeof(*ej_event), GFP_KERNEL); - if (!ej_event) { - ret = -ENOMEM; - goto err; - } + if ((!acpi_device->handler || !acpi_device->handler->hotplug.enabled) + && !acpi_device->driver) + return -ENODEV; + + status = acpi_get_type(acpi_device->handle, ¬_used); + if (ACPI_FAILURE(status) || !acpi_device->flags.ejectable) + return -ENODEV; + + mutex_lock(&acpi_scan_lock); - get_device(&acpi_device->dev); - ej_event->device = acpi_device; if (acpi_device->flags.eject_pending) { - /* event originated from ACPI eject notification */ - ej_event->event = ACPI_NOTIFY_EJECT_REQUEST; + /* ACPI eject notification event. */ + ost_source = ACPI_NOTIFY_EJECT_REQUEST; acpi_device->flags.eject_pending = 0; } else { - /* event originated from user */ - ej_event->event = ACPI_OST_EC_OSPM_EJECT; - (void) acpi_evaluate_hotplug_ost(acpi_device->handle, - ej_event->event, ACPI_OST_SC_EJECT_IN_PROGRESS, NULL); + /* Eject initiated by user space. */ + ost_source = ACPI_OST_EC_OSPM_EJECT; } - + ej_event = kmalloc(sizeof(*ej_event), GFP_KERNEL); + if (!ej_event) { + ret = -ENOMEM; + goto err_out; + } + acpi_evaluate_hotplug_ost(acpi_device->handle, ost_source, + ACPI_OST_SC_EJECT_IN_PROGRESS, NULL); + ej_event->device = acpi_device; + ej_event->event = ost_source; + get_device(&acpi_device->dev); status = acpi_os_hotplug_execute(acpi_bus_hot_remove_device, ej_event); if (ACPI_FAILURE(status)) { put_device(&acpi_device->dev); kfree(ej_event); + ret = status == AE_NO_MEMORY ? -ENOMEM : -EAGAIN; + goto err_out; } -err: + ret = count; + + out: + mutex_unlock(&acpi_scan_lock); return ret; + + err_out: + acpi_evaluate_hotplug_ost(acpi_device->handle, ost_source, + ACPI_OST_SC_NON_SPECIFIC_FAILURE, NULL); + goto out; } static DEVICE_ATTR(eject, 0200, NULL, acpi_eject_store); @@ -376,7 +574,7 @@ static int acpi_device_setup_files(struct acpi_device *dev) goto end; } - if (dev->flags.bus_address) + if (dev->pnp.type.bus_address) result = device_create_file(&dev->dev, &dev_attr_adr); if (dev->pnp.unique_id) result = device_create_f |