From 8b59560a3baf2e7c24e0fb92ea5d09eca92805db Mon Sep 17 00:00:00 2001 From: Shaohua Li Date: Thu, 28 Aug 2008 10:02:03 +0800 Subject: ACPI: dock: avoid check _STA method In some BIOSes, every _STA method call will send a notification again, this cause freeze. And in some BIOSes, it appears _STA should be called after _DCK. This tries to avoid calls _STA, and still keep the device present check. http://bugzilla.kernel.org/show_bug.cgi?id=10431 Signed-off-by: Shaohua Li Signed-off-by: Len Brown --- drivers/acpi/dock.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) (limited to 'drivers') diff --git a/drivers/acpi/dock.c b/drivers/acpi/dock.c index 7d2edf143f16..25d2161ae9d9 100644 --- a/drivers/acpi/dock.c +++ b/drivers/acpi/dock.c @@ -604,14 +604,17 @@ static int handle_eject_request(struct dock_station *ds, u32 event) static void dock_notify(acpi_handle handle, u32 event, void *data) { struct dock_station *ds = data; + struct acpi_device *tmp; switch (event) { case ACPI_NOTIFY_BUS_CHECK: - if (!dock_in_progress(ds) && dock_present(ds)) { + if (!dock_in_progress(ds) && acpi_bus_get_device(ds->handle, + &tmp)) { begin_dock(ds); dock(ds); if (!dock_present(ds)) { printk(KERN_ERR PREFIX "Unable to dock!\n"); + complete_dock(ds); break; } atomic_notifier_call_chain(&dock_notifier_list, -- cgit v1.2.2 From 82545394e0690aaef446cb262aa5dac0f9c7156e Mon Sep 17 00:00:00 2001 From: Shaohua Li Date: Thu, 28 Aug 2008 10:02:41 +0800 Subject: dock: fix eject request process (2.6.27-rc1 regression) commit 2a7feab28d3fc060d320eaba192e49dad1079b7e introduces a bug. My thinkpad actually will send an eject_request and we should follow the eject process to finish the eject, otherwise system still thinks the bay is present. Signed-off-by: Shaohua Li Signed-off-by: Len Brown --- drivers/acpi/dock.c | 5 ----- 1 file changed, 5 deletions(-) (limited to 'drivers') diff --git a/drivers/acpi/dock.c b/drivers/acpi/dock.c index 25d2161ae9d9..78d27cef573f 100644 --- a/drivers/acpi/dock.c +++ b/drivers/acpi/dock.c @@ -575,11 +575,6 @@ static int handle_eject_request(struct dock_station *ds, u32 event) */ dock_event(ds, event, UNDOCK_EVENT); - if (!dock_present(ds)) { - complete_undock(ds); - return -ENODEV; - } - hotplug_dock_devices(ds, ACPI_NOTIFY_EJECT_REQUEST); undock(ds); eject_dock(ds); -- cgit v1.2.2 From 406f692d0803d73acd3984c1e11719d3a913fd5e Mon Sep 17 00:00:00 2001 From: Shaohua Li Date: Thu, 28 Aug 2008 10:03:26 +0800 Subject: dock: add _LCK support support _LCK method, which is a optional method for hotplug lenb: we have not seen _LCK used in the field yet Signed-off-by: Shaohua Li Signed-off-by: Len Brown --- drivers/acpi/dock.c | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) (limited to 'drivers') diff --git a/drivers/acpi/dock.c b/drivers/acpi/dock.c index 78d27cef573f..7bdf93b74690 100644 --- a/drivers/acpi/dock.c +++ b/drivers/acpi/dock.c @@ -452,6 +452,25 @@ static inline void complete_undock(struct dock_station *ds) ds->flags &= ~(DOCK_UNDOCKING); } +static void dock_lock(struct dock_station *ds, int lock) +{ + struct acpi_object_list arg_list; + union acpi_object arg; + acpi_status status; + + arg_list.count = 1; + arg_list.pointer = &arg; + arg.type = ACPI_TYPE_INTEGER; + arg.integer.value = !!lock; + status = acpi_evaluate_object(ds->handle, "_LCK", &arg_list, NULL); + if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { + if (lock) + printk(KERN_WARNING PREFIX "Locking device failed\n"); + else + printk(KERN_WARNING PREFIX "Unlocking device failed\n"); + } +} + /** * dock_in_progress - see if we are in the middle of handling a dock event * @ds: the dock station @@ -577,6 +596,7 @@ static int handle_eject_request(struct dock_station *ds, u32 event) hotplug_dock_devices(ds, ACPI_NOTIFY_EJECT_REQUEST); undock(ds); + dock_lock(ds, 0); eject_dock(ds); if (dock_present(ds)) { printk(KERN_ERR PREFIX "Unable to undock!\n"); @@ -617,6 +637,7 @@ static void dock_notify(acpi_handle handle, u32 event, void *data) hotplug_dock_devices(ds, event); complete_dock(ds); dock_event(ds, event, DOCK_EVENT); + dock_lock(ds, 1); } break; case ACPI_NOTIFY_DEVICE_CHECK: -- cgit v1.2.2 From db350b084dc2cf816288643861ce07b0562dd723 Mon Sep 17 00:00:00 2001 From: Shaohua Li Date: Thu, 28 Aug 2008 10:03:58 +0800 Subject: dock: add bay and battery hotplug support Make the dock driver support bay and battery hotplug. They are all regarded as dock, so handling can be unified. Signed-off-by: Shaohua Li Signed-off-by: Len Brown --- drivers/acpi/dock.c | 223 +++++++++++++++++++++++++++++++++++++++++----------- 1 file changed, 175 insertions(+), 48 deletions(-) (limited to 'drivers') diff --git a/drivers/acpi/dock.c b/drivers/acpi/dock.c index 7bdf93b74690..799a0fdbb62d 100644 --- a/drivers/acpi/dock.c +++ b/drivers/acpi/dock.c @@ -48,7 +48,6 @@ MODULE_PARM_DESC(immediate_undock, "1 (default) will cause the driver to " " before undocking"); static struct atomic_notifier_head dock_notifier_list; -static struct platform_device *dock_device; static char dock_device_name[] = "dock"; static const struct acpi_device_id dock_device_ids[] = { @@ -65,7 +64,12 @@ struct dock_station { struct mutex hp_lock; struct list_head dependent_devices; struct list_head hotplug_devices; + + struct list_head sibiling; + struct platform_device *dock_device; }; +static LIST_HEAD(dock_stations); +static int dock_station_count; struct dock_dependent_device { struct list_head list; @@ -77,11 +81,12 @@ struct dock_dependent_device { #define DOCK_DOCKING 0x00000001 #define DOCK_UNDOCKING 0x00000002 +#define DOCK_IS_DOCK 0x00000010 +#define DOCK_IS_ATA 0x00000020 +#define DOCK_IS_BAT 0x00000040 #define DOCK_EVENT 3 #define UNDOCK_EVENT 2 -static struct dock_station *dock_station; - /***************************************************************************** * Dock Dependent device functions * *****************************************************************************/ @@ -199,6 +204,60 @@ static int is_dock(acpi_handle handle) return 1; } +static int is_ejectable(acpi_handle handle) +{ + acpi_status status; + acpi_handle tmp; + + status = acpi_get_handle(handle, "_EJ0", &tmp); + if (ACPI_FAILURE(status)) + return 0; + return 1; +} + +static int is_ata(acpi_handle handle) +{ + acpi_handle tmp; + + if ((ACPI_SUCCESS(acpi_get_handle(handle, "_GTF", &tmp))) || + (ACPI_SUCCESS(acpi_get_handle(handle, "_GTM", &tmp))) || + (ACPI_SUCCESS(acpi_get_handle(handle, "_STM", &tmp))) || + (ACPI_SUCCESS(acpi_get_handle(handle, "_SDD", &tmp)))) + return 1; + + return 0; +} + +static int is_battery(acpi_handle handle) +{ + struct acpi_device_info *info; + struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL}; + int ret = 1; + + if (!ACPI_SUCCESS(acpi_get_object_info(handle, &buffer))) + return 0; + info = buffer.pointer; + if (!(info->valid & ACPI_VALID_HID)) + ret = 0; + else + ret = !strcmp("PNP0C0A", info->hardware_id.value); + + kfree(buffer.pointer); + return ret; +} + +static int is_ejectable_bay(acpi_handle handle) +{ + acpi_handle phandle; + if (!is_ejectable(handle)) + return 0; + if (is_battery(handle) || is_ata(handle)) + return 1; + if (!acpi_get_parent(handle, &phandle) && is_ata(phandle)) + return 1; + return 0; +} + /** * is_dock_device - see if a device is on a dock station * @handle: acpi handle of the device @@ -209,11 +268,17 @@ static int is_dock(acpi_handle handle) */ int is_dock_device(acpi_handle handle) { - if (!dock_station) + struct dock_station *dock_station; + + if (!dock_station_count) return 0; - if (is_dock(handle) || find_dock_dependent_device(dock_station, handle)) + if (is_dock(handle)) return 1; + list_for_each_entry(dock_station, &dock_stations, sibiling) { + if (find_dock_dependent_device(dock_station, handle)) + return 1; + } return 0; } @@ -341,7 +406,7 @@ static void hotplug_dock_devices(struct dock_station *ds, u32 event) static void dock_event(struct dock_station *ds, u32 event, int num) { - struct device *dev = &dock_device->dev; + struct device *dev = &ds->dock_device->dev; char event_string[13]; char *envp[] = { event_string, NULL }; @@ -414,7 +479,7 @@ static void handle_dock(struct dock_station *ds, int dock) arg.type = ACPI_TYPE_INTEGER; arg.integer.value = dock; status = acpi_evaluate_object(ds->handle, "_DCK", &arg_list, &buffer); - if (ACPI_FAILURE(status)) + if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) printk(KERN_ERR PREFIX "%s - failed to execute _DCK\n", (char *)name_buffer.pointer); kfree(buffer.pointer); @@ -498,7 +563,7 @@ static int dock_in_progress(struct dock_station *ds) */ int register_dock_notifier(struct notifier_block *nb) { - if (!dock_station) + if (!dock_station_count) return -ENODEV; return atomic_notifier_chain_register(&dock_notifier_list, nb); @@ -512,7 +577,7 @@ EXPORT_SYMBOL_GPL(register_dock_notifier); */ void unregister_dock_notifier(struct notifier_block *nb) { - if (!dock_station) + if (!dock_station_count) return; atomic_notifier_chain_unregister(&dock_notifier_list, nb); @@ -535,20 +600,23 @@ register_hotplug_dock_device(acpi_handle handle, acpi_notify_handler handler, void *context) { struct dock_dependent_device *dd; + struct dock_station *dock_station; - if (!dock_station) + if (!dock_station_count) return -ENODEV; /* * make sure this handle is for a device dependent on the dock, * this would include the dock station itself */ - dd = find_dock_dependent_device(dock_station, handle); - if (dd) { - dd->handler = handler; - dd->context = context; - dock_add_hotplug_device(dock_station, dd); - return 0; + list_for_each_entry(dock_station, &dock_stations, sibiling) { + dd = find_dock_dependent_device(dock_station, handle); + if (dd) { + dd->handler = handler; + dd->context = context; + dock_add_hotplug_device(dock_station, dd); + return 0; + } } return -EINVAL; @@ -563,13 +631,16 @@ EXPORT_SYMBOL_GPL(register_hotplug_dock_device); void unregister_hotplug_dock_device(acpi_handle handle) { struct dock_dependent_device *dd; + struct dock_station *dock_station; - if (!dock_station) + if (!dock_station_count) return; - dd = find_dock_dependent_device(dock_station, handle); - if (dd) - dock_del_hotplug_device(dock_station, dd); + list_for_each_entry(dock_station, &dock_stations, sibiling) { + dd = find_dock_dependent_device(dock_station, handle); + if (dd) + dock_del_hotplug_device(dock_station, dd); + } } EXPORT_SYMBOL_GPL(unregister_hotplug_dock_device); @@ -620,9 +691,28 @@ static void dock_notify(acpi_handle handle, u32 event, void *data) { struct dock_station *ds = data; struct acpi_device *tmp; + int surprise_removal = 0; + /* + * According to acpi spec 3.0a, if a DEVICE_CHECK notification + * is sent and _DCK is present, it is assumed to mean an undock + * request. + */ + if ((ds->flags & DOCK_IS_DOCK) && event == ACPI_NOTIFY_DEVICE_CHECK) + event = ACPI_NOTIFY_EJECT_REQUEST; + + /* + * dock station: BUS_CHECK - docked or surprise removal + * DEVICE_CHECK - undocked + * other device: BUS_CHECK/DEVICE_CHECK - added or surprise removal + * + * To simplify event handling, dock dependent device handler always + * get ACPI_NOTIFY_BUS_CHECK/ACPI_NOTIFY_DEVICE_CHECK for add and + * ACPI_NOTIFY_EJECT_REQUEST for removal + */ switch (event) { case ACPI_NOTIFY_BUS_CHECK: + case ACPI_NOTIFY_DEVICE_CHECK: if (!dock_in_progress(ds) && acpi_bus_get_device(ds->handle, &tmp)) { begin_dock(ds); @@ -638,20 +728,17 @@ static void dock_notify(acpi_handle handle, u32 event, void *data) complete_dock(ds); dock_event(ds, event, DOCK_EVENT); dock_lock(ds, 1); + break; } - break; - case ACPI_NOTIFY_DEVICE_CHECK: - /* - * According to acpi spec 3.0a, if a DEVICE_CHECK notification - * is sent and _DCK is present, it is assumed to mean an - * undock request. This notify routine will only be called - * for objects defining _DCK, so we will fall through to eject - * request here. However, we will pass an eject request through - * to the driver who wish to hotplug. - */ + if (dock_present(ds) || dock_in_progress(ds)) + break; + /* This is a surprise removal */ + surprise_removal = 1; + event = ACPI_NOTIFY_EJECT_REQUEST; + /* Fall back */ case ACPI_NOTIFY_EJECT_REQUEST: begin_undock(ds); - if (immediate_undock) + if (immediate_undock || surprise_removal) handle_eject_request(ds, event); else dock_event(ds, event, UNDOCK_EVENT); @@ -707,6 +794,8 @@ fdd_out: static ssize_t show_docked(struct device *dev, struct device_attribute *attr, char *buf) { + struct dock_station *dock_station = *((struct dock_station **) + dev->platform_data); return snprintf(buf, PAGE_SIZE, "%d\n", dock_present(dock_station)); } @@ -718,6 +807,8 @@ static DEVICE_ATTR(docked, S_IRUGO, show_docked, NULL); static ssize_t show_flags(struct device *dev, struct device_attribute *attr, char *buf) { + struct dock_station *dock_station = *((struct dock_station **) + dev->platform_data); return snprintf(buf, PAGE_SIZE, "%d\n", dock_station->flags); } @@ -730,6 +821,8 @@ static ssize_t write_undock(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { int ret; + struct dock_station *dock_station = *((struct dock_station **) + dev->platform_data); if (!count) return -EINVAL; @@ -747,6 +840,8 @@ static ssize_t show_dock_uid(struct device *dev, struct device_attribute *attr, char *buf) { unsigned long lbuf; + struct dock_station *dock_station = *((struct dock_station **) + dev->platform_data); acpi_status status = acpi_evaluate_integer(dock_station->handle, "_UID", NULL, &lbuf); if (ACPI_FAILURE(status)) @@ -768,6 +863,8 @@ static int dock_add(acpi_handle handle) int ret; acpi_status status; struct dock_dependent_device *dd; + struct dock_station *dock_station; + struct platform_device *dock_device; /* allocate & initialize the dock_station private data */ dock_station = kzalloc(sizeof(*dock_station), GFP_KERNEL); @@ -777,22 +874,34 @@ static int dock_add(acpi_handle handle) dock_station->last_dock_time = jiffies - HZ; INIT_LIST_HEAD(&dock_station->dependent_devices); INIT_LIST_HEAD(&dock_station->hotplug_devices); + INIT_LIST_HEAD(&dock_station->sibiling); spin_lock_init(&dock_station->dd_lock); mutex_init(&dock_station->hp_lock); ATOMIC_INIT_NOTIFIER_HEAD(&dock_notifier_list); /* initialize platform device stuff */ - dock_device = - platform_device_register_simple(dock_device_name, 0, NULL, 0); + dock_station->dock_device = + platform_device_register_simple(dock_device_name, + dock_station_count, NULL, 0); + dock_device = dock_station->dock_device; if (IS_ERR(dock_device)) { kfree(dock_station); dock_station = NULL; return PTR_ERR(dock_device); } + platform_device_add_data(dock_device, &dock_station, + sizeof(struct dock_station *)); /* we want the dock device to send uevents */ dock_device->dev.uevent_suppress = 0; + if (is_dock(handle)) + dock_station->flags |= DOCK_IS_DOCK; + if (is_ata(handle)) + dock_station->flags |= DOCK_IS_ATA; + if (is_battery(handle)) + dock_station->flags |= DOCK_IS_BAT; + ret = device_create_file(&dock_device->dev, &dev_attr_docked); if (ret) { printk("Error %d adding sysfs file\n", ret); @@ -858,8 +967,8 @@ static int dock_add(acpi_handle handle) goto dock_add_err; } - printk(KERN_INFO PREFIX "%s\n", ACPI_DOCK_DRIVER_DESCRIPTION); - + dock_station_count++; + list_add(&dock_station->sibiling, &dock_stations); return 0; dock_add_err: @@ -878,12 +987,13 @@ dock_add_err_unregister: /** * dock_remove - free up resources related to the dock station */ -static int dock_remove(void) +static int dock_remove(struct dock_station *dock_station) { struct dock_dependent_device *dd, *tmp; acpi_status status; + struct platform_device *dock_device = dock_station->dock_device; - if (!dock_station) + if (!dock_station_count) return 0; /* remove dependent devices */ @@ -923,41 +1033,58 @@ static int dock_remove(void) static acpi_status find_dock(acpi_handle handle, u32 lvl, void *context, void **rv) { - int *count = context; acpi_status status = AE_OK; if (is_dock(handle)) { if (dock_add(handle) >= 0) { - (*count)++; status = AE_CTRL_TERMINATE; } } return status; } -static int __init dock_init(void) +static acpi_status +find_bay(acpi_handle handle, u32 lvl, void *context, void **rv) { - int num = 0; - - dock_station = NULL; + /* If bay is in a dock, it's already handled */ + if (is_ejectable_bay(handle) && !is_dock_device(handle)) + dock_add(handle); + return AE_OK; +} +static int __init dock_init(void) +{ if (acpi_disabled) return 0; /* look for a dock station */ acpi_walk_namespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT, - ACPI_UINT32_MAX, find_dock, &num, NULL); + ACPI_UINT32_MAX, find_dock, NULL, NULL); - if (!num) - printk(KERN_INFO "No dock devices found.\n"); + /* look for bay */ + acpi_walk_namespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT, + ACPI_UINT32_MAX, find_bay, NULL, NULL); + if (!dock_station_count) { + printk(KERN_INFO PREFIX "No dock devices found.\n"); + return 0; + } + printk(KERN_INFO PREFIX "%s: %d docks/bays found\n", + ACPI_DOCK_DRIVER_DESCRIPTION, dock_station_count); return 0; } static void __exit dock_exit(void) { - dock_remove(); + struct dock_station *dock_station; + + list_for_each_entry(dock_station, &dock_stations, sibiling) + dock_remove(dock_station); } -postcore_initcall(dock_init); +/* + * Must be called before drivers of devices in dock, otherwise we can't know + * which devices are in a dock + */ +subsys_initcall(dock_init); module_exit(dock_exit); -- cgit v1.2.2 From 6bd00a61ab63d4ceb635ae0316353c11c900b8d8 Mon Sep 17 00:00:00 2001 From: Shaohua Li Date: Thu, 28 Aug 2008 10:04:29 +0800 Subject: ACPI: introduce notifier change to avoid duplicates The battery driver already registers notification handler. To avoid registering notification handler again, introduce a notifier chain in global system notifier handler and use it in dock driver. Signed-off-by: Shaohua Li Signed-off-by: Len Brown --- drivers/acpi/bus.c | 15 +++++++++++++++ drivers/acpi/dock.c | 46 ++++++++++++++++++++++++---------------------- 2 files changed, 39 insertions(+), 22 deletions(-) (limited to 'drivers') diff --git a/drivers/acpi/bus.c b/drivers/acpi/bus.c index ccae305ee55d..0dc44945725e 100644 --- a/drivers/acpi/bus.c +++ b/drivers/acpi/bus.c @@ -496,6 +496,19 @@ static int acpi_bus_check_scope(struct acpi_device *device) return 0; } +static BLOCKING_NOTIFIER_HEAD(acpi_bus_notify_list); +int register_acpi_bus_notifier(struct notifier_block *nb) +{ + return blocking_notifier_chain_register(&acpi_bus_notify_list, nb); +} +EXPORT_SYMBOL_GPL(register_acpi_bus_notifier); + +void unregister_acpi_bus_notifier(struct notifier_block *nb) +{ + blocking_notifier_chain_unregister(&acpi_bus_notify_list, nb); +} +EXPORT_SYMBOL_GPL(unregister_acpi_bus_notifier); + /** * acpi_bus_notify * --------------- @@ -506,6 +519,8 @@ static void acpi_bus_notify(acpi_handle handle, u32 type, void *data) int result = 0; struct acpi_device *device = NULL; + blocking_notifier_call_chain(&acpi_bus_notify_list, + type, (void *)handle); if (acpi_bus_get_device(handle, &device)) return; diff --git a/drivers/acpi/dock.c b/drivers/acpi/dock.c index 799a0fdbb62d..2563bc62987d 100644 --- a/drivers/acpi/dock.c +++ b/drivers/acpi/dock.c @@ -748,6 +748,28 @@ static void dock_notify(acpi_handle handle, u32 event, void *data) } } +static int acpi_dock_notifier_call(struct notifier_block *this, + unsigned long event, void *data) +{ + struct dock_station *dock_station; + acpi_handle handle = (acpi_handle)data; + + if (event != ACPI_NOTIFY_BUS_CHECK && event != ACPI_NOTIFY_DEVICE_CHECK + && event != ACPI_NOTIFY_EJECT_REQUEST) + return 0; + list_for_each_entry(dock_station, &dock_stations, sibiling) { + if (dock_station->handle == handle) { + dock_notify(handle, event, dock_station); + return 0 ; + } + } + return 0; +} + +static struct notifier_block dock_acpi_notifier = { + .notifier_call = acpi_dock_notifier_call, +}; + /** * find_dock_devices - find devices on the dock station * @handle: the handle of the device we are examining @@ -861,7 +883,6 @@ static DEVICE_ATTR(uid, S_IRUGO, show_dock_uid, NULL); static int dock_add(acpi_handle handle) { int ret; - acpi_status status; struct dock_dependent_device *dd; struct dock_station *dock_station; struct platform_device *dock_device; @@ -956,23 +977,10 @@ static int dock_add(acpi_handle handle) } add_dock_dependent_device(dock_station, dd); - /* register for dock events */ - status = acpi_install_notify_handler(dock_station->handle, - ACPI_SYSTEM_NOTIFY, - dock_notify, dock_station); - - if (ACPI_FAILURE(status)) { - printk(KERN_ERR PREFIX "Error installing notify handler\n"); - ret = -ENODEV; - goto dock_add_err; - } - dock_station_count++; list_add(&dock_station->sibiling, &dock_stations); return 0; -dock_add_err: - kfree(dd); dock_add_err_unregister: device_remove_file(&dock_device->dev, &dev_attr_docked); device_remove_file(&dock_device->dev, &dev_attr_undock); @@ -990,7 +998,6 @@ dock_add_err_unregister: static int dock_remove(struct dock_station *dock_station) { struct dock_dependent_device *dd, *tmp; - acpi_status status; struct platform_device *dock_device = dock_station->dock_device; if (!dock_station_count) @@ -1001,13 +1008,6 @@ static int dock_remove(struct dock_station *dock_station) list) kfree(dd); - /* remove dock notify handler */ - status = acpi_remove_notify_handler(dock_station->handle, - ACPI_SYSTEM_NOTIFY, - dock_notify); - if (ACPI_FAILURE(status)) - printk(KERN_ERR "Error removing notify handler\n"); - /* cleanup sysfs */ device_remove_file(&dock_device->dev, &dev_attr_docked); device_remove_file(&dock_device->dev, &dev_attr_undock); @@ -1069,6 +1069,7 @@ static int __init dock_init(void) return 0; } + register_acpi_bus_notifier(&dock_acpi_notifier); printk(KERN_INFO PREFIX "%s: %d docks/bays found\n", ACPI_DOCK_DRIVER_DESCRIPTION, dock_station_count); return 0; @@ -1078,6 +1079,7 @@ static void __exit dock_exit(void) { struct dock_station *dock_station; + unregister_acpi_bus_notifier(&dock_acpi_notifier); list_for_each_entry(dock_station, &dock_stations, sibiling) dock_remove(dock_station); } -- cgit v1.2.2 From 19cd847ab24fefe9e50101ec94479e0400a08650 Mon Sep 17 00:00:00 2001 From: Zhang Rui Date: Thu, 28 Aug 2008 10:05:06 +0800 Subject: ACPI: fix hotplug race The hotplug notification handler and drivers' notification handler all run in one workqueue. Before hotplug removes an acpi device, the device driver's notification handler is already be recorded to run just after global notification handler. After hotplug notification handler runs, acpica will notice a NULL notification handler and crash. So now we run run hotplug in another workqueue and wait for all acpi notication handlers finish. This was found in battery hotplug, but actually all hotplug can be affected. Signed-off-by: Zhang Rui Signed-off-by: Shaohua Li Signed-off-by: Len Brown --- drivers/acpi/dock.c | 25 ++++++++++++++++++++++++- drivers/acpi/osl.c | 46 +++++++++++++++++++++++++++++++++++++++++----- 2 files changed, 65 insertions(+), 6 deletions(-) (limited to 'drivers') diff --git a/drivers/acpi/dock.c b/drivers/acpi/dock.c index 2563bc62987d..4b395b1e61b2 100644 --- a/drivers/acpi/dock.c +++ b/drivers/acpi/dock.c @@ -748,6 +748,20 @@ static void dock_notify(acpi_handle handle, u32 event, void *data) } } +struct dock_data { + acpi_handle handle; + unsigned long event; + struct dock_station *ds; +}; + +static void acpi_dock_deferred_cb(void *context) +{ + struct dock_data *data = (struct dock_data *)context; + + dock_notify(data->handle, data->event, data->ds); + kfree(data); +} + static int acpi_dock_notifier_call(struct notifier_block *this, unsigned long event, void *data) { @@ -759,7 +773,16 @@ static int acpi_dock_notifier_call(struct notifier_block *this, return 0; list_for_each_entry(dock_station, &dock_stations, sibiling) { if (dock_station->handle == handle) { - dock_notify(handle, event, dock_station); + struct dock_data *dock_data; + + dock_data = kmalloc(sizeof(*dock_data), GFP_KERNEL); + if (!dock_data) + return 0; + dock_data->handle = handle; + dock_data->event = event; + dock_data->ds = dock_station; + acpi_os_hotplug_execute(acpi_dock_deferred_cb, + dock_data); return 0 ; } } diff --git a/drivers/acpi/osl.c b/drivers/acpi/osl.c index 235a1386888a..750e0df15604 100644 --- a/drivers/acpi/osl.c +++ b/drivers/acpi/osl.c @@ -682,6 +682,22 @@ static void acpi_os_execute_deferred(struct work_struct *work) return; } +static void acpi_os_execute_hp_deferred(struct work_struct *work) +{ + struct acpi_os_dpc *dpc = container_of(work, struct acpi_os_dpc, work); + if (!dpc) { + printk(KERN_ERR PREFIX "Invalid (NULL) context\n"); + return; + } + + acpi_os_wait_events_complete(NULL); + + dpc->function(dpc->context); + kfree(dpc); + + return; +} + /******************************************************************************* * * FUNCTION: acpi_os_execute @@ -697,12 +713,13 @@ static void acpi_os_execute_deferred(struct work_struct *work) * ******************************************************************************/ -acpi_status acpi_os_execute(acpi_execute_type type, - acpi_osd_exec_callback function, void *context) +static acpi_status __acpi_os_execute(acpi_execute_type type, + acpi_osd_exec_callback function, void *context, int hp) { acpi_status status = AE_OK; struct acpi_os_dpc *dpc; struct workqueue_struct *queue; + int ret; ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "Scheduling function [%p(%p)] for deferred execution.\n", function, context)); @@ -726,9 +743,17 @@ acpi_status acpi_os_execute(acpi_execute_type type, dpc->function = function; dpc->context = context; - INIT_WORK(&dpc->work, acpi_os_execute_deferred); - queue = (type == OSL_NOTIFY_HANDLER) ? kacpi_notify_wq : kacpid_wq; - if (!queue_work(queue, &dpc->work)) { + if (!hp) { + INIT_WORK(&dpc->work, acpi_os_execute_deferred); + queue = (type == OSL_NOTIFY_HANDLER) ? + kacpi_notify_wq : kacpid_wq; + ret = queue_work(queue, &dpc->work); + } else { + INIT_WORK(&dpc->work, acpi_os_execute_hp_deferred); + ret = schedule_work(&dpc->work); + } + + if (!ret) { ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Call to queue_work() failed.\n")); status = AE_ERROR; @@ -737,8 +762,19 @@ acpi_status acpi_os_execute(acpi_execute_type type, return_ACPI_STATUS(status); } +acpi_status acpi_os_execute(acpi_execute_type type, + acpi_osd_exec_callback function, void *context) +{ + return __acpi_os_execute(type, function, context, 0); +} EXPORT_SYMBOL(acpi_os_execute); +acpi_status acpi_os_hotplug_execute(acpi_osd_exec_callback function, + void *context) +{ + return __acpi_os_execute(0, function, context, 1); +} + void acpi_os_wait_events_complete(void *context) { flush_workqueue(kacpid_wq); -- cgit v1.2.2 From f730ae1838635a02aa60834762c61566911d004c Mon Sep 17 00:00:00 2001 From: Shaohua Li Date: Thu, 28 Aug 2008 10:05:45 +0800 Subject: libata: remove functions now handed by ACPI dock driver dock driver can handle ata(bay) hotplug now. dock driver already handles _EJ0 and _STA, so remove them. Also libata doesn't need register notification handler anymore. Signed-off-by: Shaohua Li Acked-by: Tejun Heo Signed-off-by: Len Brown --- drivers/acpi/dock.c | 3 +- drivers/ata/libata-acpi.c | 107 ++++++---------------------------------------- 2 files changed, 16 insertions(+), 94 deletions(-) (limited to 'drivers') diff --git a/drivers/acpi/dock.c b/drivers/acpi/dock.c index 4b395b1e61b2..f19f643fb362 100644 --- a/drivers/acpi/dock.c +++ b/drivers/acpi/dock.c @@ -738,7 +738,8 @@ static void dock_notify(acpi_handle handle, u32 event, void *data) /* Fall back */ case ACPI_NOTIFY_EJECT_REQUEST: begin_undock(ds); - if (immediate_undock || surprise_removal) + if ((immediate_undock && !(ds->flags & DOCK_IS_ATA)) + || surprise_removal) handle_eject_request(ds, event); else dock_event(ds, event, UNDOCK_EVENT); diff --git a/drivers/ata/libata-acpi.c b/drivers/ata/libata-acpi.c index 9330b7922f62..97727be7e158 100644 --- a/drivers/ata/libata-acpi.c +++ b/drivers/ata/libata-acpi.c @@ -120,21 +120,6 @@ static void ata_acpi_associate_ide_port(struct ata_port *ap) ap->pflags |= ATA_PFLAG_INIT_GTM_VALID; } -static void ata_acpi_eject_device(acpi_handle handle) -{ - struct acpi_object_list arg_list; - union acpi_object arg; - - arg_list.count = 1; - arg_list.pointer = &arg; - arg.type = ACPI_TYPE_INTEGER; - arg.integer.value = 1; - - if (ACPI_FAILURE(acpi_evaluate_object(handle, "_EJ0", - &arg_list, NULL))) - printk(KERN_ERR "Failed to evaluate _EJ0!\n"); -} - /* @ap and @dev are the same as ata_acpi_handle_hotplug() */ static void ata_acpi_detach_device(struct ata_port *ap, struct ata_device *dev) { @@ -157,7 +142,6 @@ static void ata_acpi_detach_device(struct ata_port *ap, struct ata_device *dev) * @ap: ATA port ACPI event occurred * @dev: ATA device ACPI event occurred (can be NULL) * @event: ACPI event which occurred - * @is_dock_event: boolean indicating whether the event was a dock one * * All ACPI bay / device realted events end up in this function. If * the event is port-wide @dev is NULL. If the event is specific to a @@ -171,115 +155,58 @@ static void ata_acpi_detach_device(struct ata_port *ap, struct ata_device *dev) * ACPI notify handler context. May sleep. */ static void ata_acpi_handle_hotplug(struct ata_port *ap, struct ata_device *dev, - u32 event, int is_dock_event) + u32 event) { - char event_string[12]; - char *envp[] = { event_string, NULL }; struct ata_eh_info *ehi = &ap->link.eh_info; - struct kobject *kobj = NULL; int wait = 0; unsigned long flags; - acpi_handle handle, tmphandle; - unsigned long sta; - acpi_status status; + acpi_handle handle; - if (dev) { - if (dev->sdev) - kobj = &dev->sdev->sdev_gendev.kobj; + if (dev) handle = dev->acpi_handle; - } else { - kobj = &ap->dev->kobj; + else handle = ap->acpi_handle; - } - - status = acpi_get_handle(handle, "_EJ0", &tmphandle); - if (ACPI_FAILURE(status)) - /* This device does not support hotplug */ - return; - - if (event == ACPI_NOTIFY_BUS_CHECK || - event == ACPI_NOTIFY_DEVICE_CHECK) - status = acpi_evaluate_integer(handle, "_STA", NULL, &sta); spin_lock_irqsave(ap->lock, flags); - + /* + * When dock driver calls into the routine, it will always use + * ACPI_NOTIFY_BUS_CHECK/ACPI_NOTIFY_DEVICE_CHECK for add and + * ACPI_NOTIFY_EJECT_REQUEST for remove + */ switch (event) { case ACPI_NOTIFY_BUS_CHECK: case ACPI_NOTIFY_DEVICE_CHECK: ata_ehi_push_desc(ehi, "ACPI event"); - if (ACPI_FAILURE(status)) { - ata_port_printk(ap, KERN_ERR, - "acpi: failed to determine bay status (0x%x)\n", - status); - break; - } - - if (sta) { - ata_ehi_hotplugged(ehi); - ata_port_freeze(ap); - } else { - /* The device has gone - unplug it */ - ata_acpi_detach_device(ap, dev); - wait = 1; - } + ata_ehi_hotplugged(ehi); + ata_port_freeze(ap); break; case ACPI_NOTIFY_EJECT_REQUEST: ata_ehi_push_desc(ehi, "ACPI event"); - if (!is_dock_event) - break; - - /* undock event - immediate unplug */ ata_acpi_detach_device(ap, dev); wait = 1; break; } - /* make sure kobj doesn't go away while ap->lock is released */ - kobject_get(kobj); - spin_unlock_irqrestore(ap->lock, flags); - if (wait) { + if (wait) ata_port_wait_eh(ap); - ata_acpi_eject_device(handle); - } - - if (kobj && !is_dock_event) { - sprintf(event_string, "BAY_EVENT=%d", event); - kobject_uevent_env(kobj, KOBJ_CHANGE, envp); - } - - kobject_put(kobj); } static void ata_acpi_dev_notify_dock(acpi_handle handle, u32 event, void *data) { struct ata_device *dev = data; - ata_acpi_handle_hotplug(dev->link->ap, dev, event, 1); + ata_acpi_handle_hotplug(dev->link->ap, dev, event); } static void ata_acpi_ap_notify_dock(acpi_handle handle, u32 event, void *data) { struct ata_port *ap = data; - ata_acpi_handle_hotplug(ap, NULL, event, 1); -} - -static void ata_acpi_dev_notify(acpi_handle handle, u32 event, void *data) -{ - struct ata_device *dev = data; - - ata_acpi_handle_hotplug(dev->link->ap, dev, event, 0); -} - -static void ata_acpi_ap_notify(acpi_handle handle, u32 event, void *data) -{ - struct ata_port *ap = data; - - ata_acpi_handle_hotplug(ap, NULL, event, 0); + ata_acpi_handle_hotplug(ap, NULL, event); } /** @@ -315,9 +242,6 @@ void ata_acpi_associate(struct ata_host *host) ata_acpi_associate_ide_port(ap); if (ap->acpi_handle) { - acpi_install_notify_handler(ap->acpi_handle, - ACPI_SYSTEM_NOTIFY, - ata_acpi_ap_notify, ap); /* we might be on a docking station */ register_hotplug_dock_device(ap->acpi_handle, ata_acpi_ap_notify_dock, ap); @@ -327,9 +251,6 @@ void ata_acpi_associate(struct ata_host *host) struct ata_device *dev = &ap->link.device[j]; if (dev->acpi_handle) { - acpi_install_notify_handler(dev->acpi_handle, - ACPI_SYSTEM_NOTIFY, - ata_acpi_dev_notify, dev); /* we might be on a docking station */ register_hotplug_dock_device(dev->acpi_handle, ata_acpi_dev_notify_dock, dev); -- cgit v1.2.2 From 1253f7aabfebc51446dbec5c8895c5c8846dfe06 Mon Sep 17 00:00:00 2001 From: Shaohua Li Date: Thu, 28 Aug 2008 10:06:16 +0800 Subject: dock: introduce .uevent for devices in dock, eg libata dock's uevent reported itself, not ata. It might be difficult to find an ata device just according to a dock. This patch introduces docking ops for each device in a dock. when docking, dock driver can send device specific uevent. This should help dock station too (not just bay) Signed-off-by: Shaohua Li Acked-by: Tejun Heo Signed-off-by: Len Brown --- drivers/acpi/dock.c | 22 +++++++++++++------ drivers/ata/libata-acpi.c | 44 ++++++++++++++++++++++++++++++++++++-- drivers/pci/hotplug/acpiphp_glue.c | 6 ++++-- 3 files changed, 61 insertions(+), 11 deletions(-) (limited to 'drivers') diff --git a/drivers/acpi/dock.c b/drivers/acpi/dock.c index f19f643fb362..ac7dfefcb50b 100644 --- a/drivers/acpi/dock.c +++ b/drivers/acpi/dock.c @@ -75,7 +75,7 @@ struct dock_dependent_device { struct list_head list; struct list_head hotplug_list; acpi_handle handle; - acpi_notify_handler handler; + struct acpi_dock_ops *ops; void *context; }; @@ -385,8 +385,8 @@ static void hotplug_dock_devices(struct dock_station *ds, u32 event) * First call driver specific hotplug functions */ list_for_each_entry(dd, &ds->hotplug_devices, hotplug_list) { - if (dd->handler) - dd->handler(dd->handle, event, dd->context); + if (dd->ops && dd->ops->handler) + dd->ops->handler(dd->handle, event, dd->context); } /* @@ -409,6 +409,7 @@ static void dock_event(struct dock_station *ds, u32 event, int num) struct device *dev = &ds->dock_device->dev; char event_string[13]; char *envp[] = { event_string, NULL }; + struct dock_dependent_device *dd; if (num == UNDOCK_EVENT) sprintf(event_string, "EVENT=undock"); @@ -419,7 +420,14 @@ static void dock_event(struct dock_station *ds, u32 event, int num) * Indicate that the status of the dock station has * changed. */ - kobject_uevent_env(&dev->kobj, KOBJ_CHANGE, envp); + if (num == DOCK_EVENT) + kobject_uevent_env(&dev->kobj, KOBJ_CHANGE, envp); + + list_for_each_entry(dd, &ds->hotplug_devices, hotplug_list) + if (dd->ops && dd->ops->uevent) + dd->ops->uevent(dd->handle, event, dd->context); + if (num != DOCK_EVENT) + kobject_uevent_env(&dev->kobj, KOBJ_CHANGE, envp); } /** @@ -588,7 +596,7 @@ EXPORT_SYMBOL_GPL(unregister_dock_notifier); /** * register_hotplug_dock_device - register a hotplug function * @handle: the handle of the device - * @handler: the acpi_notifier_handler to call after docking + * @ops: handlers to call after docking * @context: device specific data * * If a driver would like to perform a hotplug operation after a dock @@ -596,7 +604,7 @@ EXPORT_SYMBOL_GPL(unregister_dock_notifier); * the dock driver after _DCK is executed. */ int -register_hotplug_dock_device(acpi_handle handle, acpi_notify_handler handler, +register_hotplug_dock_device(acpi_handle handle, struct acpi_dock_ops *ops, void *context) { struct dock_dependent_device *dd; @@ -612,7 +620,7 @@ register_hotplug_dock_device(acpi_handle handle, acpi_notify_handler handler, list_for_each_entry(dock_station, &dock_stations, sibiling) { dd = find_dock_dependent_device(dock_station, handle); if (dd) { - dd->handler = handler; + dd->ops = ops; dd->context = context; dock_add_hotplug_device(dock_station, dd); return 0; diff --git a/drivers/ata/libata-acpi.c b/drivers/ata/libata-acpi.c index 97727be7e158..c012307d0ba6 100644 --- a/drivers/ata/libata-acpi.c +++ b/drivers/ata/libata-acpi.c @@ -209,6 +209,46 @@ static void ata_acpi_ap_notify_dock(acpi_handle handle, u32 event, void *data) ata_acpi_handle_hotplug(ap, NULL, event); } +static void ata_acpi_uevent(struct ata_port *ap, struct ata_device *dev, + u32 event) +{ + struct kobject *kobj = NULL; + char event_string[20]; + char *envp[] = { event_string, NULL }; + + if (dev) { + if (dev->sdev) + kobj = &dev->sdev->sdev_gendev.kobj; + } else + kobj = &ap->dev->kobj; + + if (kobj) { + snprintf(event_string, 20, "BAY_EVENT=%d", event); + kobject_uevent_env(kobj, KOBJ_CHANGE, envp); + } +} + +static void ata_acpi_ap_uevent(acpi_handle handle, u32 event, void *data) +{ + ata_acpi_uevent(data, NULL, event); +} + +static void ata_acpi_dev_uevent(acpi_handle handle, u32 event, void *data) +{ + struct ata_device *dev = data; + ata_acpi_uevent(dev->link->ap, dev, event); +} + +static struct acpi_dock_ops ata_acpi_dev_dock_ops = { + .handler = ata_acpi_dev_notify_dock, + .uevent = ata_acpi_dev_uevent, +}; + +static struct acpi_dock_ops ata_acpi_ap_dock_ops = { + .handler = ata_acpi_ap_notify_dock, + .uevent = ata_acpi_ap_uevent, +}; + /** * ata_acpi_associate - associate ATA host with ACPI objects * @host: target ATA host @@ -244,7 +284,7 @@ void ata_acpi_associate(struct ata_host *host) if (ap->acpi_handle) { /* we might be on a docking station */ register_hotplug_dock_device(ap->acpi_handle, - ata_acpi_ap_notify_dock, ap); + &ata_acpi_ap_dock_ops, ap); } for (j = 0; j < ata_link_max_devices(&ap->link); j++) { @@ -253,7 +293,7 @@ void ata_acpi_associate(struct ata_host *host) if (dev->acpi_handle) { /* we might be on a docking station */ register_hotplug_dock_device(dev->acpi_handle, - ata_acpi_dev_notify_dock, dev); + &ata_acpi_dev_dock_ops, dev); } } } diff --git a/drivers/pci/hotplug/acpiphp_glue.c b/drivers/pci/hotplug/acpiphp_glue.c index a3e4705dd8f0..db54c5ef2aa5 100644 --- a/drivers/pci/hotplug/acpiphp_glue.c +++ b/drivers/pci/hotplug/acpiphp_glue.c @@ -169,7 +169,9 @@ static int post_dock_fixups(struct notifier_block *nb, unsigned long val, } - +static struct acpi_dock_ops acpiphp_dock_ops = { + .handler = handle_hotplug_event_func, +}; /* callback routine to register each ACPI PCI slot object */ static acpi_status @@ -285,7 +287,7 @@ register_slot(acpi_handle handle, u32 lvl, void *context, void **rv) */ newfunc->flags &= ~FUNC_HAS_EJ0; if (register_hotplug_dock_device(handle, - handle_hotplug_event_func, newfunc)) + &acpiphp_dock_ops, newfunc)) dbg("failed to register dock device\n"); /* we need to be notified when dock events happen -- cgit v1.2.2 From 4be9309d15e88e4a1e4a78deb52eb88c7da38c99 Mon Sep 17 00:00:00 2001 From: Shaohua Li Date: Thu, 28 Aug 2008 10:06:44 +0800 Subject: bay: remove driver, all functions now handled by dock driver Signed-off-by: Shaohua Li Signed-off-by: Len Brown --- drivers/acpi/Kconfig | 11 +- drivers/acpi/Makefile | 1 - drivers/acpi/bay.c | 411 -------------------------------------------------- 3 files changed, 2 insertions(+), 421 deletions(-) delete mode 100644 drivers/acpi/bay.c (limited to 'drivers') diff --git a/drivers/acpi/Kconfig b/drivers/acpi/Kconfig index 735f5ea17473..3919d6dbe06f 100644 --- a/drivers/acpi/Kconfig +++ b/drivers/acpi/Kconfig @@ -160,15 +160,8 @@ config ACPI_DOCK tristate "Dock" depends on EXPERIMENTAL help - This driver adds support for ACPI controlled docking stations - -config ACPI_BAY - tristate "Removable Drive Bay (EXPERIMENTAL)" - depends on EXPERIMENTAL - depends on ACPI_DOCK - help - This driver adds support for ACPI controlled removable drive - bays such as the IBM ultrabay or the Dell Module Bay. + This driver adds support for ACPI controlled docking stations and removable + drive bays such as the IBM ultrabay or the Dell Module Bay. config ACPI_PROCESSOR tristate "Processor" diff --git a/drivers/acpi/Makefile b/drivers/acpi/Makefile index 52a4cd4b81d0..ad4bfd558ff3 100644 --- a/drivers/acpi/Makefile +++ b/drivers/acpi/Makefile @@ -45,7 +45,6 @@ obj-$(CONFIG_ACPI_BATTERY) += battery.o obj-$(CONFIG_ACPI_BUTTON) += button.o obj-$(CONFIG_ACPI_FAN) += fan.o obj-$(CONFIG_ACPI_DOCK) += dock.o -obj-$(CONFIG_ACPI_BAY) += bay.o obj-$(CONFIG_ACPI_VIDEO) += video.o obj-y += pci_root.o pci_link.o pci_irq.o pci_bind.o obj-$(CONFIG_ACPI_PCI_SLOT) += pci_slot.o diff --git a/drivers/acpi/bay.c b/drivers/acpi/bay.c deleted file mode 100644 index 61b6c5beb2d3..000000000000 --- a/drivers/acpi/bay.c +++ /dev/null @@ -1,411 +0,0 @@ -/* - * bay.c - ACPI removable drive bay driver - * - * Copyright (C) 2006 Kristen Carlson Accardi - * - * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or (at - * your option) any later version. - * - * This program is distributed in the hope that it will be useful, but - * WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * General Public License for more details. - * - * You should have received a copy of the GNU General Public License along - * with this program; if not, write to the Free Software Foundation, Inc., - * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. - * - * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ - */ -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include - -ACPI_MODULE_NAME("bay"); -MODULE_AUTHOR("Kristen Carlson Accardi"); -MODULE_DESCRIPTION("ACPI Removable Drive Bay Driver"); -MODULE_LICENSE("GPL"); -#define ACPI_BAY_CLASS "bay" -#define ACPI_BAY_COMPONENT 0x10000000 -#define _COMPONENT ACPI_BAY_COMPONENT -#define bay_dprintk(h,s) {\ - char prefix[80] = {'\0'};\ - struct acpi_buffer buffer = {sizeof(prefix), prefix};\ - acpi_get_name(h, ACPI_FULL_PATHNAME, &buffer);\ - printk(KERN_DEBUG PREFIX "%s: %s\n", prefix, s); } -static void bay_notify(acpi_handle handle, u32 event, void *data); - -static const struct acpi_device_id bay_device_ids[] = { - {"LNXIOBAY", 0}, - {"", 0}, -}; -MODULE_DEVICE_TABLE(acpi, bay_device_ids); - -struct bay { - acpi_handle handle; - char *name; - struct list_head list; - struct platform_device *pdev; -}; - -static LIST_HEAD(drive_bays); - - -/***************************************************************************** - * Drive Bay functions * - *****************************************************************************/ -/** - * is_ejectable - see if a device is ejectable - * @handle: acpi handle of the device - * - * If an acpi object has a _EJ0 method, then it is ejectable - */ -static int is_ejectable(acpi_handle handle) -{ - acpi_status status; - acpi_handle tmp; - - status = acpi_get_handle(handle, "_EJ0", &tmp); - if (ACPI_FAILURE(status)) - return 0; - return 1; -} - -/** - * bay_present - see if the bay device is present - * @bay: the drive bay - * - * execute the _STA method. - */ -static int bay_present(struct bay *bay) -{ - unsigned long sta; - acpi_status status; - - if (bay) { - status = acpi_evaluate_integer(bay->handle, "_STA", NULL, &sta); - if (ACPI_SUCCESS(status) && sta) - return 1; - } - return 0; -} - -/** - * eject_device - respond to an eject request - * @handle - the device to eject - * - * Call this devices _EJ0 method. - */ -static void eject_device(acpi_handle handle) -{ - struct acpi_object_list arg_list; - union acpi_object arg; - - bay_dprintk(handle, "Ejecting device"); - - arg_list.count = 1; - arg_list.pointer = &arg; - arg.type = ACPI_TYPE_INTEGER; - arg.integer.value = 1; - - if (ACPI_FAILURE(acpi_evaluate_object(handle, "_EJ0", - &arg_list, NULL))) - pr_debug("Failed to evaluate _EJ0!\n"); -} - -/* - * show_present - read method for "present" file in sysfs - */ -static ssize_t show_present(struct device *dev, - struct device_attribute *attr, char *buf) -{ - struct bay *bay = dev_get_drvdata(dev); - return snprintf(buf, PAGE_SIZE, "%d\n", bay_present(bay)); - -} -static DEVICE_ATTR(present, S_IRUGO, show_present, NULL); - -/* - * write_eject - write method for "eject" file in sysfs - */ -static ssize_t write_eject(struct device *dev, struct device_attribute *attr, - const char *buf, size_t count) -{ - struct bay *bay = dev_get_drvdata(dev); - - if (!count) - return -EINVAL; - - eject_device(bay->handle); - return count; -} -static DEVICE_ATTR(eject, S_IWUSR, NULL, write_eject); - -/** - * is_ata - see if a device is an ata device - * @handle: acpi handle of the device - * - * If an acpi object has one of 4 ATA ACPI methods defined, - * then it is an ATA device - */ -static int is_ata(acpi_handle handle) -{ - acpi_handle tmp; - - if ((ACPI_SUCCESS(acpi_get_handle(handle, "_GTF", &tmp))) || - (ACPI_SUCCESS(acpi_get_handle(handle, "_GTM", &tmp))) || - (ACPI_SUCCESS(acpi_get_handle(handle, "_STM", &tmp))) || - (ACPI_SUCCESS(acpi_get_handle(handle, "_SDD", &tmp)))) - return 1; - - return 0; -} - -/** - * parent_is_ata(acpi_handle handle) - * - */ -static int parent_is_ata(acpi_handle handle) -{ - acpi_handle phandle; - - if (acpi_get_parent(handle, &phandle)) - return 0; - - return is_ata(phandle); -} - -/** - * is_ejectable_bay - see if a device is an ejectable drive bay - * @handle: acpi handle of the device - * - * If an acpi object is ejectable and has one of the ACPI ATA - * methods defined, then we can safely call it an ejectable - * drive bay - */ -static int is_ejectable_bay(acpi_handle handle) -{ - if ((is_ata(handle) || parent_is_ata(handle)) && is_ejectable(handle)) - return 1; - return 0; -} - -#if 0 -/** - * eject_removable_drive - try to eject this drive - * @dev : the device structure of the drive - * - * If a device is a removable drive that requires an _EJ0 method - * to be executed in order to safely remove from the system, do - * it. ATM - always returns success - */ -int eject_removable_drive(struct device *dev) -{ - acpi_handle handle = DEVICE_ACPI_HANDLE(dev); - - if (handle) { - bay_dprintk(handle, "Got device handle"); - if (is_ejectable_bay(handle)) - eject_device(handle); - } else { - printk("No acpi handle for device\n"); - } - - /* should I return an error code? */ - return 0; -} -EXPORT_SYMBOL_GPL(eject_removable_drive); -#endif /* 0 */ - -static int acpi_bay_add_fs(struct bay *bay) -{ - int ret; - struct device *dev = &bay->pdev->dev; - - ret = device_create_file(dev, &dev_attr_present); - if (ret) - goto add_fs_err; - ret = device_create_file(dev, &dev_attr_eject); - if (ret) { - device_remove_file(dev, &dev_attr_present); - goto add_fs_err; - } - return 0; - - add_fs_err: - bay_dprintk(bay->handle, "Error adding sysfs files\n"); - return ret; -} - -static void acpi_bay_remove_fs(struct bay *bay) -{ - struct device *dev = &bay->pdev->dev; - - /* cleanup sysfs */ - device_remove_file(dev, &dev_attr_present); - device_remove_file(dev, &dev_attr_eject); -} - -static int bay_is_dock_device(acpi_handle handle) -{ - acpi_handle parent; - - acpi_get_parent(handle, &parent); - - /* if the device or it's parent is dependent on the - * dock, then we are a dock device - */ - return (is_dock_device(handle) || is_dock_device(parent)); -} - -static int bay_add(acpi_handle handle, int id) -{ - acpi_status status; - struct bay *new_bay; - struct platform_device *pdev; - struct acpi_buffer nbuffer = {ACPI_ALLOCATE_BUFFER, NULL}; - acpi_get_name(handle, ACPI_FULL_PATHNAME, &nbuffer); - - bay_dprintk(handle, "Adding notify handler"); - - /* - * Initialize bay device structure - */ - new_bay = kzalloc(sizeof(*new_bay), GFP_ATOMIC); - INIT_LIST_HEAD(&new_bay->list); - new_bay->handle = handle; - new_bay->name = (char *)nbuffer.pointer; - - /* initialize platform device stuff */ - pdev = platform_device_register_simple(ACPI_BAY_CLASS, id, NULL, 0); - if (IS_ERR(pdev)) { - printk(KERN_ERR PREFIX "Error registering bay device\n"); - goto bay_add_err; - } - new_bay->pdev = pdev; - platform_set_drvdata(pdev, new_bay); - - /* - * we want the bay driver to be able to send uevents - */ - pdev->dev.uevent_suppress = 0; - - /* register for events on this device */ - status = acpi_install_notify_handler(handle, ACPI_SYSTEM_NOTIFY, - bay_notify, new_bay); - if (ACPI_FAILURE(status)) { - printk(KERN_INFO PREFIX "Error installing bay notify handler\n"); - platform_device_unregister(new_bay->pdev); - goto bay_add_err; - } - - if (acpi_bay_add_fs(new_bay)) { - acpi_remove_notify_handler(handle, ACPI_SYSTEM_NOTIFY, - bay_notify); - platform_device_unregister(new_bay->pdev); - goto bay_add_err; - } - - /* if we are on a dock station, we should register for dock - * notifications. - */ - if (bay_is_dock_device(handle)) { - bay_dprintk(handle, "Is dependent on dock\n"); - register_hotplug_dock_device(handle, bay_notify, new_bay); - } - list_add(&new_bay->list, &drive_bays); - printk(KERN_INFO PREFIX "Bay [%s] Added\n", new_bay->name); - return 0; - -bay_add_err: - kfree(new_bay->name); - kfree(new_bay); - return -ENODEV; -} - -/** - * bay_notify - act upon an acpi bay notification - * @handle: the bay handle - * @event: the acpi event - * @data: our driver data struct - * - */ -static void bay_notify(acpi_handle handle, u32 event, void *data) -{ - struct bay *bay_dev = (struct bay *)data; - struct device *dev = &bay_dev->pdev->dev; - char event_string[12]; - char *envp[] = { event_string, NULL }; - - bay_dprintk(handle, "Bay event"); - sprintf(event_string, "BAY_EVENT=%d", event); - kobject_uevent_env(&dev->kobj, KOBJ_CHANGE, envp); -} - -static acpi_status -find_bay(acpi_handle handle, u32 lvl, void *context, void **rv) -{ - int *count = (int *)context; - - /* - * there could be more than one ejectable bay. - * so, just return AE_OK always so that every object - * will be checked. - */ - if (is_ejectable_bay(handle)) { - bay_dprintk(handle, "found ejectable bay"); - if (!bay_add(handle, *count)) - (*count)++; - } - return AE_OK; -} - -static int __init bay_init(void) -{ - int bays = 0; - - INIT_LIST_HEAD(&drive_bays); - - if (acpi_disabled) - return -ENODEV; - - /* look for dockable drive bays */ - acpi_walk_namespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT, - ACPI_UINT32_MAX, find_bay, &bays, NULL); - - if (!bays) - return -ENODEV; - - return 0; -} - -static void __exit bay_exit(void) -{ - struct bay *bay, *tmp; - - list_for_each_entry_safe(bay, tmp, &drive_bays, list) { - if (is_dock_device(bay->handle)) - unregister_hotplug_dock_device(bay->handle); - acpi_bay_remove_fs(bay); - acpi_remove_notify_handler(bay->handle, ACPI_SYSTEM_NOTIFY, - bay_notify); - platform_device_unregister(bay->pdev); - kfree(bay->name); - kfree(bay); - } -} - -postcore_initcall(bay_init); -module_exit(bay_exit); - -- cgit v1.2.2 From 61b836958371c717d1e6d4fea1d2c512969ad20b Mon Sep 17 00:00:00 2001 From: Shaohua Li Date: Thu, 28 Aug 2008 10:07:14 +0800 Subject: dock: fix for ATA bay in a dock station an ATA bay can be in a dock and itself can be ejected separately. This patch handles such eject bay. Found by Holger. Signed-off-by: Shaohua Li Signed-off-by: Len Brown --- drivers/acpi/dock.c | 14 ++++++++++---- 1 file changed, 10 insertions(+), 4 deletions(-) (limited to 'drivers') diff --git a/drivers/acpi/dock.c b/drivers/acpi/dock.c index ac7dfefcb50b..c877cc526002 100644 --- a/drivers/acpi/dock.c +++ b/drivers/acpi/dock.c @@ -609,6 +609,7 @@ register_hotplug_dock_device(acpi_handle handle, struct acpi_dock_ops *ops, { struct dock_dependent_device *dd; struct dock_station *dock_station; + int ret = -EINVAL; if (!dock_station_count) return -ENODEV; @@ -618,16 +619,21 @@ register_hotplug_dock_device(acpi_handle handle, struct acpi_dock_ops *ops, * this would include the dock station itself */ list_for_each_entry(dock_station, &dock_stations, sibiling) { + /* + * An ATA bay can be in a dock and itself can be ejected + * seperately, so there are two 'dock stations' which need the + * ops + */ dd = find_dock_dependent_device(dock_station, handle); if (dd) { dd->ops = ops; dd->context = context; dock_add_hotplug_device(dock_station, dd); - return 0; + ret = 0; } } - return -EINVAL; + return ret; } EXPORT_SYMBOL_GPL(register_hotplug_dock_device); @@ -1078,8 +1084,8 @@ find_dock(acpi_handle handle, u32 lvl, void *context, void **rv) static acpi_status find_bay(acpi_handle handle, u32 lvl, void *context, void **rv) { - /* If bay is in a dock, it's already handled */ - if (is_ejectable_bay(handle) && !is_dock_device(handle)) + /* If bay is a dock, it's already handled */ + if (is_ejectable_bay(handle) && !is_dock(handle)) dock_add(handle); return AE_OK; } -- cgit v1.2.2 From 8652b00fd6416773f113dab3dfa0d4509def825b Mon Sep 17 00:00:00 2001 From: Shaohua Li Date: Thu, 28 Aug 2008 10:07:45 +0800 Subject: dock: add 'type' sysfs file add a sysfs file to present dock type. Suggested by Holger. Signed-off-by: Shaohua Li Signed-off-by: Len Brown --- drivers/acpi/dock.c | 25 +++++++++++++++++++++++++ 1 file changed, 25 insertions(+) (limited to 'drivers') diff --git a/drivers/acpi/dock.c b/drivers/acpi/dock.c index c877cc526002..b7d15818215c 100644 --- a/drivers/acpi/dock.c +++ b/drivers/acpi/dock.c @@ -911,6 +911,26 @@ static ssize_t show_dock_uid(struct device *dev, } static DEVICE_ATTR(uid, S_IRUGO, show_dock_uid, NULL); +static ssize_t show_dock_type(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct dock_station *dock_station = *((struct dock_station **) + dev->platform_data); + char *type; + + if (dock_station->flags & DOCK_IS_DOCK) + type = "dock_station"; + else if (dock_station->flags & DOCK_IS_ATA) + type = "ata_bay"; + else if (dock_station->flags & DOCK_IS_BAT) + type = "battery_bay"; + else + type = "unknown"; + + return snprintf(buf, PAGE_SIZE, "%s\n", type); +} +static DEVICE_ATTR(type, S_IRUGO, show_dock_type, NULL); + /** * dock_add - add a new dock station * @handle: the dock station handle @@ -999,6 +1019,9 @@ static int dock_add(acpi_handle handle) dock_station = NULL; return ret; } + ret = device_create_file(&dock_device->dev, &dev_attr_type); + if (ret) + printk(KERN_ERR"Error %d adding sysfs file\n", ret); /* Find dependent devices */ acpi_walk_namespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT, @@ -1020,6 +1043,7 @@ static int dock_add(acpi_handle handle) return 0; dock_add_err_unregister: + device_remove_file(&dock_device->dev, &dev_attr_type); device_remove_file(&dock_device->dev, &dev_attr_docked); device_remove_file(&dock_device->dev, &dev_attr_undock); device_remove_file(&dock_device->dev, &dev_attr_uid); @@ -1047,6 +1071,7 @@ static int dock_remove(struct dock_station *dock_station) kfree(dd); /* cleanup sysfs */ + device_remove_file(&dock_device->dev, &dev_attr_type); device_remove_file(&dock_device->dev, &dev_attr_docked); device_remove_file(&dock_device->dev, &dev_attr_undock); device_remove_file(&dock_device->dev, &dev_attr_uid); -- cgit v1.2.2 From 0a918a9432cc30aede10f904253b66ea6ab485ac Mon Sep 17 00:00:00 2001 From: Thomas Renninger Date: Sat, 11 Oct 2008 00:15:04 -0400 Subject: Subject: ACPI dock: Use ACPI_EXCEPTION instead of printk(KERN_ERR lenb: stripped patch down to what still applied to new dock.c Signed-off-by: Thomas Renninger Signed-off-by: Len Brown --- drivers/acpi/dock.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) (limited to 'drivers') diff --git a/drivers/acpi/dock.c b/drivers/acpi/dock.c index b7d15818215c..913bb1e89dd6 100644 --- a/drivers/acpi/dock.c +++ b/drivers/acpi/dock.c @@ -488,8 +488,9 @@ static void handle_dock(struct dock_station *ds, int dock) arg.integer.value = dock; status = acpi_evaluate_object(ds->handle, "_DCK", &arg_list, &buffer); if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) - printk(KERN_ERR PREFIX "%s - failed to execute _DCK\n", - (char *)name_buffer.pointer); + ACPI_EXCEPTION((AE_INFO, status, "%s - failed to execute" + " _DCK\n", (char *)name_buffer.pointer)); + kfree(buffer.pointer); kfree(name_buffer.pointer); } -- cgit v1.2.2