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Merge branch 'acpi-pci-hotplug' into acpi-ost

This commit is contained in:
Rafael J. Wysocki 2014-02-21 01:06:58 +01:00
parent ae3caa80a5 cc6254e00e
commit 2bd74d91b1
10 changed files with 352 additions and 413 deletions
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33
drivers/acpi/acpica/nsxfeval.c
View File

@ -923,19 +923,22 @@ ACPI_EXPORT_SYMBOL(acpi_detach_data)
/*******************************************************************************
*
* FUNCTION: acpi_get_data
* FUNCTION: acpi_get_data_full
*
* PARAMETERS: obj_handle - Namespace node
* handler - Handler used in call to attach_data
* data - Where the data is returned
* callback - function to execute before returning
*
* RETURN: Status
*
* DESCRIPTION: Retrieve data that was previously attached to a namespace node.
* DESCRIPTION: Retrieve data that was previously attached to a namespace node
* and execute a callback before returning.
*
******************************************************************************/
acpi_status
acpi_get_data(acpi_handle obj_handle, acpi_object_handler handler, void **data)
acpi_get_data_full(acpi_handle obj_handle, acpi_object_handler handler,
void **data, void (*callback)(void *))
{
struct acpi_namespace_node *node;
acpi_status status;
@ -960,10 +963,34 @@ acpi_get_data(acpi_handle obj_handle, acpi_object_handler handler, void **data)
}
status = acpi_ns_get_attached_data(node, handler, data);
if (ACPI_SUCCESS(status) && callback) {
callback(*data);
}
unlock_and_exit:
(void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
return (status);
}
ACPI_EXPORT_SYMBOL(acpi_get_data_full)
/*******************************************************************************
*
* FUNCTION: acpi_get_data
*
* PARAMETERS: obj_handle - Namespace node
* handler - Handler used in call to attach_data
* data - Where the data is returned
*
* RETURN: Status
*
* DESCRIPTION: Retrieve data that was previously attached to a namespace node.
*
******************************************************************************/
acpi_status
acpi_get_data(acpi_handle obj_handle, acpi_object_handler handler, void **data)
{
return acpi_get_data_full(obj_handle, handler, data, NULL);
}
ACPI_EXPORT_SYMBOL(acpi_get_data)

57
drivers/acpi/bus.c
View File

@ -340,60 +340,77 @@ static void acpi_bus_osc_support(void)
*/
static void acpi_bus_notify(acpi_handle handle, u32 type, void *data)
{
struct acpi_device *device = NULL;
struct acpi_device *adev;
struct acpi_driver *driver;
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Notification %#02x to handle %p\n",
type, handle));
acpi_status status;
u32 ost_code = ACPI_OST_SC_NON_SPECIFIC_FAILURE;
switch (type) {
case ACPI_NOTIFY_BUS_CHECK:
/* TBD */
acpi_handle_debug(handle, "ACPI_NOTIFY_BUS_CHECK event\n");
break;
case ACPI_NOTIFY_DEVICE_CHECK:
/* TBD */
acpi_handle_debug(handle, "ACPI_NOTIFY_DEVICE_CHECK event\n");
break;
case ACPI_NOTIFY_DEVICE_WAKE:
/* TBD */
acpi_handle_debug(handle, "ACPI_NOTIFY_DEVICE_WAKE event\n");
break;
case ACPI_NOTIFY_EJECT_REQUEST:
/* TBD */
acpi_handle_debug(handle, "ACPI_NOTIFY_EJECT_REQUEST event\n");
break;
case ACPI_NOTIFY_DEVICE_CHECK_LIGHT:
acpi_handle_debug(handle, "ACPI_NOTIFY_DEVICE_CHECK_LIGHT event\n");
/* TBD: Exactly what does 'light' mean? */
break;
case ACPI_NOTIFY_FREQUENCY_MISMATCH:
/* TBD */
acpi_handle_err(handle, "Device cannot be configured due "
"to a frequency mismatch\n");
break;
case ACPI_NOTIFY_BUS_MODE_MISMATCH:
/* TBD */
acpi_handle_err(handle, "Device cannot be configured due "
"to a bus mode mismatch\n");
break;
case ACPI_NOTIFY_POWER_FAULT:
/* TBD */
acpi_handle_err(handle, "Device has suffered a power fault\n");
break;
default:
ACPI_DEBUG_PRINT((ACPI_DB_INFO,
"Received unknown/unsupported notification [%08x]\n",
type));
break;
acpi_handle_warn(handle, "Unsupported event type 0x%x\n", type);
ost_code = ACPI_OST_SC_UNRECOGNIZED_NOTIFY;
goto err;
}
acpi_bus_get_device(handle, &device);
if (device) {
driver = device->driver;
adev = acpi_bus_get_acpi_device(handle);
if (!adev)
goto err;
driver = adev->driver;
if (driver && driver->ops.notify &&
(driver->flags & ACPI_DRIVER_ALL_NOTIFY_EVENTS))
driver->ops.notify(device, type);
driver->ops.notify(adev, type);
switch (type) {
case ACPI_NOTIFY_BUS_CHECK:
case ACPI_NOTIFY_DEVICE_CHECK:
case ACPI_NOTIFY_EJECT_REQUEST:
status = acpi_hotplug_execute(acpi_device_hotplug, adev, type);
if (ACPI_SUCCESS(status))
return;
default:
break;
}
acpi_bus_put_acpi_device(adev);
return;
err:
acpi_evaluate_hotplug_ost(handle, type, ost_code, NULL);
}
/* --------------------------------------------------------------------------

1
drivers/acpi/internal.h
View File

@ -73,6 +73,7 @@ static inline void acpi_lpss_init(void) {}
#endif
bool acpi_queue_hotplug_work(struct work_struct *work);
void acpi_device_hotplug(void *data, u32 src);
bool acpi_scan_is_offline(struct acpi_device *adev, bool uevent);
/* --------------------------------------------------------------------------

2
drivers/acpi/pci_root.c
View File

@ -51,7 +51,7 @@ static void acpi_pci_root_remove(struct acpi_device *device);
static int acpi_pci_root_scan_dependent(struct acpi_device *adev)
{
acpiphp_check_host_bridge(adev->handle);
acpiphp_check_host_bridge(adev);
return 0;
}

181
drivers/acpi/scan.c
View File

@ -41,6 +41,7 @@ static DEFINE_MUTEX(acpi_scan_lock);
static LIST_HEAD(acpi_scan_handlers_list);
DEFINE_MUTEX(acpi_device_lock);
LIST_HEAD(acpi_wakeup_device_list);
static DEFINE_MUTEX(acpi_hp_context_lock);
struct acpi_device_bus_id{
char bus_id[15];
@ -60,6 +61,16 @@ void acpi_scan_lock_release(void)
}
EXPORT_SYMBOL_GPL(acpi_scan_lock_release);
void acpi_lock_hp_context(void)
{
mutex_lock(&acpi_hp_context_lock);
}
void acpi_unlock_hp_context(void)
{
mutex_unlock(&acpi_hp_context_lock);
}
int acpi_scan_add_handler(struct acpi_scan_handler *handler)
{
if (!handler || !handler->attach)
@ -439,92 +450,76 @@ static int acpi_scan_bus_check(struct acpi_device *adev)
return 0;
}
static void acpi_device_hotplug(void *data, u32 src)
static int acpi_generic_hotplug_event(struct acpi_device *adev, u32 type)
{
switch (type) {
case ACPI_NOTIFY_BUS_CHECK:
return acpi_scan_bus_check(adev);
case ACPI_NOTIFY_DEVICE_CHECK:
return acpi_scan_device_check(adev);
case ACPI_NOTIFY_EJECT_REQUEST:
case ACPI_OST_EC_OSPM_EJECT:
if (adev->handler && !adev->handler->hotplug.enabled) {
dev_info(&adev->dev, "Eject disabled\n");
return -EPERM;
}
acpi_evaluate_hotplug_ost(adev->handle, ACPI_NOTIFY_EJECT_REQUEST,
ACPI_OST_SC_EJECT_IN_PROGRESS, NULL);
return acpi_scan_hot_remove(adev);
}
return -EINVAL;
}
void acpi_device_hotplug(void *data, u32 src)
{
u32 ost_code = ACPI_OST_SC_NON_SPECIFIC_FAILURE;
struct acpi_device *adev = data;
int error;
int error = -ENODEV;
lock_device_hotplug();
mutex_lock(&acpi_scan_lock);
/*
* The device object's ACPI handle cannot become invalid as long as we
* are holding acpi_scan_lock, but it may have become invalid before
* are holding acpi_scan_lock, but it might have become invalid before
* that lock was acquired.
*/
if (adev->handle == INVALID_ACPI_HANDLE)
goto out;
goto err_out;
switch (src) {
case ACPI_NOTIFY_BUS_CHECK:
error = acpi_scan_bus_check(adev);
break;
case ACPI_NOTIFY_DEVICE_CHECK:
error = acpi_scan_device_check(adev);
break;
case ACPI_NOTIFY_EJECT_REQUEST:
case ACPI_OST_EC_OSPM_EJECT:
error = acpi_scan_hot_remove(adev);
break;
default:
error = -EINVAL;
break;
if (adev->flags.hotplug_notify) {
error = acpi_generic_hotplug_event(adev, src);
if (error == -EPERM) {
ost_code = ACPI_OST_SC_EJECT_NOT_SUPPORTED;
goto err_out;
}
} else {
int (*event)(struct acpi_device *, u32);
acpi_lock_hp_context();
event = adev->hp ? adev->hp->event : NULL;
acpi_unlock_hp_context();
/*
* There may be additional notify handlers for device objects
* without the .event() callback, so ignore them here.
*/
if (event)
error = event(adev, src);
else
goto out;
}
if (!error)
ost_code = ACPI_OST_SC_SUCCESS;
out:
err_out:
acpi_evaluate_hotplug_ost(adev->handle, src, ost_code, NULL);
put_device(&adev->dev);
out:
acpi_bus_put_acpi_device(adev);
mutex_unlock(&acpi_scan_lock);
unlock_device_hotplug();
}
static void acpi_hotplug_notify_cb(acpi_handle handle, u32 type, void *data)
{
u32 ost_code = ACPI_OST_SC_NON_SPECIFIC_FAILURE;
struct acpi_device *adev;
acpi_status status;
if (acpi_bus_get_device(handle, &adev))
goto err_out;
switch (type) {
case ACPI_NOTIFY_BUS_CHECK:
acpi_handle_debug(handle, "ACPI_NOTIFY_BUS_CHECK event\n");
break;
case ACPI_NOTIFY_DEVICE_CHECK:
acpi_handle_debug(handle, "ACPI_NOTIFY_DEVICE_CHECK event\n");
break;
case ACPI_NOTIFY_EJECT_REQUEST:
acpi_handle_debug(handle, "ACPI_NOTIFY_EJECT_REQUEST event\n");
if (!adev->handler)
goto err_out;
if (!adev->handler->hotplug.enabled) {
acpi_handle_err(handle, "Eject disabled\n");
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);
break;
default:
/* non-hotplug event; possibly handled by other handler */
return;
}
get_device(&adev->dev);
status = acpi_hotplug_execute(acpi_device_hotplug, adev, type);
if (ACPI_SUCCESS(status))
return;
put_device(&adev->dev);
err_out:
acpi_evaluate_hotplug_ost(handle, type, ost_code, NULL);
}
static ssize_t real_power_state_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
@ -570,8 +565,6 @@ acpi_eject_store(struct device *d, struct device_attribute *attr,
if (ACPI_FAILURE(status) || !acpi_device->flags.ejectable)
return -ENODEV;
acpi_evaluate_hotplug_ost(acpi_device->handle, ACPI_OST_EC_OSPM_EJECT,
ACPI_OST_SC_EJECT_IN_PROGRESS, NULL);
get_device(&acpi_device->dev);
status = acpi_hotplug_execute(acpi_device_hotplug, acpi_device,
ACPI_OST_EC_OSPM_EJECT);
@ -1114,14 +1107,16 @@ static void acpi_scan_drop_device(acpi_handle handle, void *context)
mutex_unlock(&acpi_device_del_lock);
}
int acpi_bus_get_device(acpi_handle handle, struct acpi_device **device)
static int acpi_get_device_data(acpi_handle handle, struct acpi_device **device,
void (*callback)(void *))
{
acpi_status status;
if (!device)
return -EINVAL;
status = acpi_get_data(handle, acpi_scan_drop_device, (void **)device);
status = acpi_get_data_full(handle, acpi_scan_drop_device,
(void **)device, callback);
if (ACPI_FAILURE(status) || !*device) {
ACPI_DEBUG_PRINT((ACPI_DB_INFO, "No context for object [%p]\n",
handle));
@ -1129,8 +1124,32 @@ int acpi_bus_get_device(acpi_handle handle, struct acpi_device **device)
}
return 0;
}
int acpi_bus_get_device(acpi_handle handle, struct acpi_device **device)
{
return acpi_get_device_data(handle, device, NULL);
}
EXPORT_SYMBOL(acpi_bus_get_device);
static void get_acpi_device(void *dev)
{
if (dev)
get_device(&((struct acpi_device *)dev)->dev);
}
struct acpi_device *acpi_bus_get_acpi_device(acpi_handle handle)
{
struct acpi_device *adev = NULL;
acpi_get_device_data(handle, &adev, get_acpi_device);
return adev;
}
void acpi_bus_put_acpi_device(struct acpi_device *adev)
{
put_device(&adev->dev);
}
int acpi_device_add(struct acpi_device *device,
void (*release)(struct device *))
{
@ -1957,33 +1976,19 @@ void acpi_scan_hotplug_enabled(struct acpi_hotplug_profile *hotplug, bool val)
mutex_unlock(&acpi_scan_lock);
}
static void acpi_scan_init_hotplug(acpi_handle handle, int type)
static void acpi_scan_init_hotplug(struct acpi_device *adev)
{
struct acpi_device_pnp pnp = {};
struct acpi_hardware_id *hwid;
list_for_each_entry(hwid, &adev->pnp.ids, list) {
struct acpi_scan_handler *handler;
INIT_LIST_HEAD(&pnp.ids);
acpi_set_pnp_ids(handle, &pnp, type);
if (!pnp.type.hardware_id)
goto out;
/*
* This relies on the fact that acpi_install_notify_handler() will not
* install the same notify handler routine twice for the same handle.
*/
list_for_each_entry(hwid, &pnp.ids, list) {
handler = acpi_scan_match_handler(hwid->id, NULL);
if (handler) {
acpi_install_notify_handler(handle, ACPI_SYSTEM_NOTIFY,
acpi_hotplug_notify_cb, handler);
adev->flags.hotplug_notify = true;
break;
}
}
out:
acpi_free_pnp_ids(&pnp);
}
static acpi_status acpi_bus_check_add(acpi_handle handle, u32 lvl_not_used,
@ -2007,12 +2012,12 @@ static acpi_status acpi_bus_check_add(acpi_handle handle, u32 lvl_not_used,
return AE_OK;
}
acpi_scan_init_hotplug(handle, type);
acpi_add_single_object(&device, handle, type, sta);
if (!device)
return AE_CTRL_DEPTH;
acpi_scan_init_hotplug(device);
out:
if (!*return_value)
*return_value = device;

16
drivers/pci/hotplug/acpiphp.h
View File

@ -93,7 +93,6 @@ struct acpiphp_slot {
struct list_head funcs; /* one slot may have different
objects (i.e. for each function) */
struct slot *slot;
struct mutex crit_sect;
u8 device; /* pci device# */
u32 flags; /* see below */
@ -117,20 +116,30 @@ struct acpiphp_func {
};
struct acpiphp_context {
acpi_handle handle;
struct acpi_hotplug_context hp;
struct acpiphp_func func;
struct acpiphp_bridge *bridge;
unsigned int refcount;
};
static inline struct acpiphp_context *to_acpiphp_context(struct acpi_hotplug_context *hp)
{
return container_of(hp, struct acpiphp_context, hp);
}
static inline struct acpiphp_context *func_to_context(struct acpiphp_func *func)
{
return container_of(func, struct acpiphp_context, func);
}
static inline struct acpi_device *func_to_acpi_device(struct acpiphp_func *func)
{
return func_to_context(func)->hp.self;
}
static inline acpi_handle func_to_handle(struct acpiphp_func *func)
{
return func_to_context(func)->handle;
return func_to_acpi_device(func)->handle;
}
/*
@ -158,7 +167,6 @@ struct acpiphp_attention_info
#define FUNC_HAS_STA (0x00000001)
#define FUNC_HAS_EJ0 (0x00000002)
#define FUNC_HAS_DCK (0x00000004)
/* function prototypes */

432
drivers/pci/hotplug/acpiphp_glue.c
View File

@ -58,71 +58,57 @@
static LIST_HEAD(bridge_list);
static DEFINE_MUTEX(bridge_mutex);
static DEFINE_MUTEX(acpiphp_context_lock);
static void handle_hotplug_event(acpi_handle handle, u32 type, void *data);
static int acpiphp_hotplug_event(struct acpi_device *adev, u32 type);
static void acpiphp_sanitize_bus(struct pci_bus *bus);
static void acpiphp_set_hpp_values(struct pci_bus *bus);
static void hotplug_event(acpi_handle handle, u32 type, void *data);
static void hotplug_event(u32 type, struct acpiphp_context *context);
static void free_bridge(struct kref *kref);
static void acpiphp_context_handler(acpi_handle handle, void *context)
{
/* Intentionally empty. */
}
/**
* acpiphp_init_context - Create hotplug context and grab a reference to it.
* @handle: ACPI object handle to create the context for.
* @adev: ACPI device object to create the context for.
*
* Call under acpiphp_context_lock.
* Call under acpi_hp_context_lock.
*/
static struct acpiphp_context *acpiphp_init_context(acpi_handle handle)
static struct acpiphp_context *acpiphp_init_context(struct acpi_device *adev)
{
struct acpiphp_context *context;
acpi_status status;
context = kzalloc(sizeof(*context), GFP_KERNEL);
if (!context)
return NULL;
context->handle = handle;
context->refcount = 1;
status = acpi_attach_data(handle, acpiphp_context_handler, context);
if (ACPI_FAILURE(status)) {
kfree(context);
return NULL;
}
acpi_set_hp_context(adev, &context->hp, acpiphp_hotplug_event);
return context;
}
/**
* acpiphp_get_context - Get hotplug context and grab a reference to it.
* @handle: ACPI object handle to get the context for.
* @adev: ACPI device object to get the context for.
*
* Call under acpiphp_context_lock.
* Call under acpi_hp_context_lock.
*/
static struct acpiphp_context *acpiphp_get_context(acpi_handle handle)
static struct acpiphp_context *acpiphp_get_context(struct acpi_device *adev)
{
struct acpiphp_context *context = NULL;
acpi_status status;
void *data;
struct acpiphp_context *context;
status = acpi_get_data(handle, acpiphp_context_handler, &data);
if (ACPI_SUCCESS(status)) {
context = data;
if (!adev->hp)
return NULL;
context = to_acpiphp_context(adev->hp);
context->refcount++;
}
return context;
}
/**
* acpiphp_put_context - Drop a reference to ACPI hotplug context.
* @handle: ACPI object handle to put the context for.
* @context: ACPI hotplug context to drop a reference to.
*
* The context object is removed if there are no more references to it.
*
* Call under acpiphp_context_lock.
* Call under acpi_hp_context_lock.
*/
static void acpiphp_put_context(struct acpiphp_context *context)
{
@ -130,7 +116,7 @@ static void acpiphp_put_context(struct acpiphp_context *context)
return;
WARN_ON(context->bridge);
acpi_detach_data(context->handle, acpiphp_context_handler);
context->hp.self->hp = NULL;
kfree(context);
}
@ -151,7 +137,7 @@ static void free_bridge(struct kref *kref)
struct acpiphp_slot *slot, *next;
struct acpiphp_func *func, *tmp;
mutex_lock(&acpiphp_context_lock);
acpi_lock_hp_context();
bridge = container_of(kref, struct acpiphp_bridge, ref);
@ -175,7 +161,7 @@ static void free_bridge(struct kref *kref)
pci_dev_put(bridge->pci_dev);
kfree(bridge);
mutex_unlock(&acpiphp_context_lock);
acpi_unlock_hp_context();
}
/*
@ -212,22 +198,13 @@ static void post_dock_fixups(acpi_handle not_used, u32 event, void *data)
static void dock_event(acpi_handle handle, u32 type, void *data)
{
struct acpiphp_context *context;
struct acpi_device *adev;
mutex_lock(&acpiphp_context_lock);
context = acpiphp_get_context(handle);
if (!context || WARN_ON(context->handle != handle)
|| context->func.parent->is_going_away) {
mutex_unlock(&acpiphp_context_lock);
return;
adev = acpi_bus_get_acpi_device(handle);
if (adev) {
acpiphp_hotplug_event(adev, type);
acpi_bus_put_acpi_device(adev);
}
get_bridge(context->func.parent);
acpiphp_put_context(context);
mutex_unlock(&acpiphp_context_lock);
hotplug_event(handle, type, data);
put_bridge(context->func.parent);
}
static const struct acpi_dock_ops acpiphp_dock_ops = {
@ -278,12 +255,19 @@ static void acpiphp_dock_release(void *data)
put_bridge(context->func.parent);
}
/* callback routine to register each ACPI PCI slot object */
static acpi_status register_slot(acpi_handle handle, u32 lvl, void *data,
/**
* acpiphp_add_context - Add ACPIPHP context to an ACPI device object.
* @handle: ACPI handle of the object to add a context to.
* @lvl: Not used.
* @data: The object's parent ACPIPHP bridge.
* @rv: Not used.
*/
static acpi_status acpiphp_add_context(acpi_handle handle, u32 lvl, void *data,
void **rv)
{
struct acpiphp_bridge *bridge = data;
struct acpiphp_context *context;
struct acpi_device *adev;
struct acpiphp_slot *slot;
struct acpiphp_func *newfunc;
acpi_status status = AE_OK;
@ -293,9 +277,6 @@ static acpi_status register_slot(acpi_handle handle, u32 lvl, void *data,
struct pci_dev *pdev = bridge->pci_dev;
u32 val;
if (pdev && device_is_managed_by_native_pciehp(pdev))
return AE_OK;
status = acpi_evaluate_integer(handle, "_ADR", NULL, &adr);
if (ACPI_FAILURE(status)) {
if (status != AE_NOT_FOUND)
@ -303,21 +284,22 @@ static acpi_status register_slot(acpi_handle handle, u32 lvl, void *data,
"can't evaluate _ADR (%#x)\n", status);
return AE_OK;
}
if (acpi_bus_get_device(handle, &adev))
return AE_OK;
device = (adr >> 16) & 0xffff;
function = adr & 0xffff;
mutex_lock(&acpiphp_context_lock);
context = acpiphp_init_context(handle);
acpi_lock_hp_context();
context = acpiphp_init_context(adev);
if (!context) {
mutex_unlock(&acpiphp_context_lock);
acpi_unlock_hp_context();
acpi_handle_err(handle, "No hotplug context\n");
return AE_NOT_EXIST;
}
newfunc = &context->func;
newfunc->function = function;
newfunc->parent = bridge;
mutex_unlock(&acpiphp_context_lock);
if (acpi_has_method(handle, "_EJ0"))
newfunc->flags = FUNC_HAS_EJ0;
@ -325,8 +307,14 @@ static acpi_status register_slot(acpi_handle handle, u32 lvl, void *data,
if (acpi_has_method(handle, "_STA"))
newfunc->flags |= FUNC_HAS_STA;
/*
* Dock stations' notify handler should be used for dock devices instead
* of the common one, so clear hp.event in their contexts.
*/
if (acpi_has_method(handle, "_DCK"))
newfunc->flags |= FUNC_HAS_DCK;
context->hp.event = NULL;
acpi_unlock_hp_context();
/* search for objects that share the same slot */
list_for_each_entry(slot, &bridge->slots, node)
@ -335,19 +323,26 @@ static acpi_status register_slot(acpi_handle handle, u32 lvl, void *data,
slot = kzalloc(sizeof(struct acpiphp_slot), GFP_KERNEL);
if (!slot) {
status = AE_NO_MEMORY;
goto err;
acpi_lock_hp_context();
acpiphp_put_context(context);
acpi_unlock_hp_context();
return AE_NO_MEMORY;
}
slot->bus = bridge->pci_bus;
slot->device = device;
INIT_LIST_HEAD(&slot->funcs);
mutex_init(&slot->crit_sect);
list_add_tail(&slot->node, &bridge->slots);
/* Register slots for ejectable functions only. */
if (acpi_pci_check_ejectable(pbus, handle) || is_dock_device(handle)) {
/*
* Expose slots to user space for functions that have _EJ0 or _RMV or
* are located in dock stations. Do not expose them for devices handled
* by the native PCIe hotplug (PCIeHP), becuase that code is supposed to
* expose slots to user space in those cases.
*/
if ((acpi_pci_check_ejectable(pbus, handle) || is_dock_device(handle))
&& !(pdev && device_is_managed_by_native_pciehp(pdev))) {
unsigned long long sun;
int retval;
@ -393,32 +388,16 @@ static acpi_status register_slot(acpi_handle handle, u32 lvl, void *data,
pr_debug("failed to register dock device\n");
}
/* install notify handler */
if (!(newfunc->flags & FUNC_HAS_DCK)) {
status = acpi_install_notify_handler(handle, ACPI_SYSTEM_NOTIFY,
handle_hotplug_event,
context);
if (ACPI_FAILURE(status))
acpi_handle_err(handle,
"failed to install notify handler\n");
}
return AE_OK;
err:
mutex_lock(&acpiphp_context_lock);
acpiphp_put_context(context);
mutex_unlock(&acpiphp_context_lock);
return status;
}
static struct acpiphp_bridge *acpiphp_handle_to_bridge(acpi_handle handle)
static struct acpiphp_bridge *acpiphp_dev_to_bridge(struct acpi_device *adev)
{
struct acpiphp_context *context;
struct acpiphp_bridge *bridge = NULL;
mutex_lock(&acpiphp_context_lock);
context = acpiphp_get_context(handle);
acpi_lock_hp_context();
context = acpiphp_get_context(adev);
if (context) {
bridge = context->bridge;
if (bridge)
@ -426,7 +405,7 @@ static struct acpiphp_bridge *acpiphp_handle_to_bridge(acpi_handle handle)
acpiphp_put_context(context);
}
mutex_unlock(&acpiphp_context_lock);
acpi_unlock_hp_context();
return bridge;
}
@ -434,22 +413,17 @@ static void cleanup_bridge(struct acpiphp_bridge *bridge)
{
struct acpiphp_slot *slot;
struct acpiphp_func *func;
acpi_status status;
list_for_each_entry(slot, &bridge->slots, node) {
list_for_each_entry(func, &slot->funcs, sibling) {
acpi_handle handle = func_to_handle(func);
struct acpi_device *adev = func_to_acpi_device(func);
if (is_dock_device(handle))
unregister_hotplug_dock_device(handle);
if (is_dock_device(adev->handle))
unregister_hotplug_dock_device(adev->handle);
if (!(func->flags & FUNC_HAS_DCK)) {
status = acpi_remove_notify_handler(handle,
ACPI_SYSTEM_NOTIFY,
handle_hotplug_event);
if (ACPI_FAILURE(status))
pr_err("failed to remove notify handler\n");
}
acpi_lock_hp_context();
adev->hp->event = NULL;
acpi_unlock_hp_context();
}
slot->flags |= SLOT_IS_GOING_AWAY;
if (slot->slot)
@ -460,9 +434,9 @@ static void cleanup_bridge(struct acpiphp_bridge *bridge)
list_del(&bridge->list);
mutex_unlock(&bridge_mutex);
mutex_lock(&acpiphp_context_lock);
acpi_lock_hp_context();
bridge->is_going_away = true;
mutex_unlock(&acpiphp_context_lock);
acpi_unlock_hp_context();
}
/**
@ -492,33 +466,6 @@ static unsigned char acpiphp_max_busnr(struct pci_bus *bus)
return max;
}
/**
* acpiphp_bus_trim - Trim device objects in an ACPI namespace subtree.
* @handle: ACPI device object handle to start from.
*/
static void acpiphp_bus_trim(acpi_handle handle)
{
struct acpi_device *adev = NULL;
acpi_bus_get_device(handle, &adev);
if (adev)
acpi_bus_trim(adev);
}
/**
* acpiphp_bus_add - Scan ACPI namespace subtree.
* @handle: ACPI object handle to start the scan from.
*/
static void acpiphp_bus_add(acpi_handle handle)
{
struct acpi_device *adev = NULL;
acpi_bus_scan(handle);
acpi_bus_get_device(handle, &adev);
if (acpi_device_enumerated(adev))
acpi_device_set_power(adev, ACPI_STATE_D0);
}
static void acpiphp_set_acpi_region(struct acpiphp_slot *slot)
{
struct acpiphp_func *func;
@ -558,9 +505,13 @@ static int acpiphp_rescan_slot(struct acpiphp_slot *slot)
{
struct acpiphp_func *func;
list_for_each_entry(func, &slot->funcs, sibling)
acpiphp_bus_add(func_to_handle(func));
list_for_each_entry(func, &slot->funcs, sibling) {
struct acpi_device *adev = func_to_acpi_device(func);
acpi_bus_scan(adev->handle);
if (acpi_device_enumerated(adev))
acpi_device_set_power(adev, ACPI_STATE_D0);
}
return pci_scan_slot(slot->bus, PCI_DEVFN(slot->device, 0));
}
@ -625,32 +576,15 @@ static void __ref enable_slot(struct acpiphp_slot *slot)
}
}
/* return first device in slot, acquiring a reference on it */
static struct pci_dev *dev_in_slot(struct acpiphp_slot *slot)
{
struct pci_bus *bus = slot->bus;
struct pci_dev *dev;
struct pci_dev *ret = NULL;
down_read(&pci_bus_sem);
list_for_each_entry(dev, &bus->devices, bus_list)
if (PCI_SLOT(dev->devfn) == slot->device) {
ret = pci_dev_get(dev);
break;
}
up_read(&pci_bus_sem);
return ret;
}
/**
* disable_slot - disable a slot
* @slot: ACPI PHP slot
*/
static void disable_slot(struct acpiphp_slot *slot)
{
struct pci_bus *bus = slot->bus;
struct pci_dev *dev, *prev;
struct acpiphp_func *func;
struct pci_dev *pdev;
/*
* enable_slot() enumerates all functions in this device via
@ -658,22 +592,18 @@ static void disable_slot(struct acpiphp_slot *slot)
* methods (_EJ0, etc.) or not. Therefore, we remove all functions
* here.
*/
while ((pdev = dev_in_slot(slot))) {
pci_stop_and_remove_bus_device(pdev);
pci_dev_put(pdev);
}
list_for_each_entry_safe_reverse(dev, prev, &bus->devices, bus_list)
if (PCI_SLOT(dev->devfn) == slot->device)
pci_stop_and_remove_bus_device(dev);
list_for_each_entry(func, &slot->funcs, sibling)
acpiphp_bus_trim(func_to_handle(func));
acpi_bus_trim(func_to_acpi_device(func));
slot->flags &= (~SLOT_ENABLED);
}
static bool acpiphp_no_hotplug(acpi_handle handle)
static bool acpiphp_no_hotplug(struct acpi_device *adev)
{
struct acpi_device *adev = NULL;
acpi_bus_get_device(handle, &adev);
return adev && adev->flags.no_hotplug;
}
@ -682,7 +612,7 @@ static bool slot_no_hotplug(struct acpiphp_slot *slot)
struct acpiphp_func *func;
list_for_each_entry(func, &slot->funcs, sibling)
if (acpiphp_no_hotplug(func_to_handle(func)))
if (acpiphp_no_hotplug(func_to_acpi_device(func)))
return true;
return false;
@ -747,17 +677,17 @@ static inline bool device_status_valid(unsigned int sta)
*/
static void trim_stale_devices(struct pci_dev *dev)
{
acpi_handle handle = ACPI_HANDLE(&dev->dev);
struct acpi_device *adev = ACPI_COMPANION(&dev->dev);
struct pci_bus *bus = dev->subordinate;
bool alive = false;
if (handle) {
if (adev) {
acpi_status status;
unsigned long long sta;
status = acpi_evaluate_integer(handle, "_STA", NULL, &sta);
status = acpi_evaluate_integer(adev->handle, "_STA", NULL, &sta);
alive = (ACPI_SUCCESS(status) && device_status_valid(sta))
|| acpiphp_no_hotplug(handle);
|| acpiphp_no_hotplug(adev);
}
if (!alive) {
u32 v;
@ -767,8 +697,8 @@ static void trim_stale_devices(struct pci_dev *dev)
}
if (!alive) {
pci_stop_and_remove_bus_device(dev);
if (handle)
acpiphp_bus_trim(handle);
if (adev)
acpi_bus_trim(adev);
} else if (bus) {
struct pci_dev *child, *tmp;
@ -800,7 +730,6 @@ static void acpiphp_check_bridge(struct acpiphp_bridge *bridge)
struct pci_bus *bus = slot->bus;
struct pci_dev *dev, *tmp;
mutex_lock(&slot->crit_sect);
if (slot_no_hotplug(slot)) {
; /* do nothing */
} else if (device_status_valid(get_slot_status(slot))) {
@ -815,7 +744,6 @@ static void acpiphp_check_bridge(struct acpiphp_bridge *bridge)
} else {
disable_slot(slot);
}
mutex_unlock(&slot->crit_sect);
}
}
@ -855,11 +783,11 @@ static void acpiphp_sanitize_bus(struct pci_bus *bus)
* ACPI event handlers
*/
void acpiphp_check_host_bridge(acpi_handle handle)
void acpiphp_check_host_bridge(struct acpi_device *adev)
{
struct acpiphp_bridge *bridge;
bridge = acpiphp_handle_to_bridge(handle);
bridge = acpiphp_dev_to_bridge(adev);
if (bridge) {
pci_lock_rescan_remove();
@ -872,73 +800,52 @@ void acpiphp_check_host_bridge(acpi_handle handle)
static int acpiphp_disable_and_eject_slot(struct acpiphp_slot *slot);
static void hotplug_event(acpi_handle handle, u32 type, void *data)
static void hotplug_event(u32 type, struct acpiphp_context *context)
{
struct acpiphp_context *context = data;
acpi_handle handle = context->hp.self->handle;
struct acpiphp_func *func = &context->func;
struct acpiphp_slot *slot = func->slot;
struct acpiphp_bridge *bridge;
char objname[64];
struct acpi_buffer buffer = { .length = sizeof(objname),
.pointer = objname };
mutex_lock(&acpiphp_context_lock);
acpi_lock_hp_context();
bridge = context->bridge;
if (bridge)
get_bridge(bridge);
mutex_unlock(&acpiphp_context_lock);
acpi_unlock_hp_context();
pci_lock_rescan_remove();
acpi_get_name(handle, ACPI_FULL_PATHNAME, &buffer);
switch (type) {
case ACPI_NOTIFY_BUS_CHECK:
/* bus re-enumerate */
pr_debug("%s: Bus check notify on %s\n", __func__, objname);
pr_debug("%s: re-enumerating slots under %s\n",
__func__, objname);
if (bridge) {
acpi_handle_debug(handle, "Bus check in %s()\n", __func__);
if (bridge)
acpiphp_check_bridge(bridge);
} else {
struct acpiphp_slot *slot = func->slot;
if (slot->flags & SLOT_IS_GOING_AWAY)
break;
mutex_lock(&slot->crit_sect);
else if (!(slot->flags & SLOT_IS_GOING_AWAY))
enable_slot(slot);
mutex_unlock(&slot->crit_sect);
}
break;
case ACPI_NOTIFY_DEVICE_CHECK:
/* device check */
pr_debug("%s: Device check notify on %s\n", __func__, objname);
acpi_handle_debug(handle, "Device check in %s()\n", __func__);
if (bridge) {
acpiphp_check_bridge(bridge);
} else {
struct acpiphp_slot *slot = func->slot;
int ret;
if (slot->flags & SLOT_IS_GOING_AWAY)
break;
} else if (!(slot->flags & SLOT_IS_GOING_AWAY)) {
/*
* Check if anything has changed in the slot and rescan
* from the parent if that's the case.
*/
mutex_lock(&slot->crit_sect);
ret = acpiphp_rescan_slot(slot);
mutex_unlock(&slot->crit_sect);
if (ret)
if (acpiphp_rescan_slot(slot))
acpiphp_check_bridge(func->parent);
}
break;
case ACPI_NOTIFY_EJECT_REQUEST:
/* request device eject */
pr_debug("%s: Device eject notify on %s\n", __func__, objname);
acpiphp_disable_and_eject_slot(func->slot);
acpi_handle_debug(handle, "Eject request in %s()\n", __func__);
acpiphp_disable_and_eject_slot(slot);
break;
}
@ -947,106 +854,48 @@ static void hotplug_event(acpi_handle handle, u32 type, void *data)
put_bridge(bridge);
}
static void hotplug_event_work(void *data, u32 type)
static int acpiphp_hotplug_event(struct acpi_device *adev, u32 type)
{
struct acpiphp_context *context = data;
acpi_handle handle = context->handle;
struct acpiphp_context *context;
acpi_scan_lock_acquire();
acpi_lock_hp_context();
context = acpiphp_get_context(adev);
if (!context || context->func.parent->is_going_away) {
acpi_unlock_hp_context();
return -ENODATA;
}
get_bridge(context->func.parent);
acpiphp_put_context(context);
acpi_unlock_hp_context();
hotplug_event(handle, type, context);
hotplug_event(type, context);
acpi_scan_lock_release();
acpi_evaluate_hotplug_ost(handle, type, ACPI_OST_SC_SUCCESS, NULL);
put_bridge(context->func.parent);
return 0;
}
/**
* handle_hotplug_event - handle ACPI hotplug event
* @handle: Notify()'ed acpi_handle
* @type: Notify code
* @data: pointer to acpiphp_context structure
* acpiphp_enumerate_slots - Enumerate PCI slots for a given bus.
* @bus: PCI bus to enumerate the slots for.
*
* Handles ACPI event notification on slots.
*/
static void handle_hotplug_event(acpi_handle handle, u32 type, void *data)
{
struct acpiphp_context *context;
u32 ost_code = ACPI_OST_SC_SUCCESS;
acpi_status status;
switch (type) {
case ACPI_NOTIFY_BUS_CHECK:
case ACPI_NOTIFY_DEVICE_CHECK:
break;
case ACPI_NOTIFY_EJECT_REQUEST:
ost_code = ACPI_OST_SC_EJECT_IN_PROGRESS;
acpi_evaluate_hotplug_ost(handle, type, ost_code, NULL);
break;
case ACPI_NOTIFY_DEVICE_WAKE:
return;
case ACPI_NOTIFY_FREQUENCY_MISMATCH:
acpi_handle_err(handle, "Device cannot be configured due "
"to a frequency mismatch\n");
goto out;
case ACPI_NOTIFY_BUS_MODE_MISMATCH:
acpi_handle_err(handle, "Device cannot be configured due "
"to a bus mode mismatch\n");
goto out;
case ACPI_NOTIFY_POWER_FAULT:
acpi_handle_err(handle, "Device has suffered a power fault\n");
goto out;
default:
acpi_handle_warn(handle, "Unsupported event type 0x%x\n", type);
ost_code = ACPI_OST_SC_UNRECOGNIZED_NOTIFY;
goto out;
}
mutex_lock(&acpiphp_context_lock);
context = acpiphp_get_context(handle);
if (!context || WARN_ON(context->handle != handle)
|| context->func.parent->is_going_away)
goto err_out;
get_bridge(context->func.parent);
acpiphp_put_context(context);
status = acpi_hotplug_execute(hotplug_event_work, context, type);
if (ACPI_SUCCESS(status)) {
mutex_unlock(&acpiphp_context_lock);
return;
}
put_bridge(context->func.parent);
err_out:
mutex_unlock(&acpiphp_context_lock);
ost_code = ACPI_OST_SC_NON_SPECIFIC_FAILURE;
out:
acpi_evaluate_hotplug_ost(handle, type, ost_code, NULL);
}
/*
* Create hotplug slots for the PCI bus.
* It should always return 0 to avoid skipping following notifiers.
* A "slot" is an object associated with a PCI device number. All functions
* (PCI devices) with the same bus and device number belong to the same slot.
*/
void acpiphp_enumerate_slots(struct pci_bus *bus)
{
struct acpiphp_bridge *bridge;
struct acpi_device *adev;
acpi_handle handle;
acpi_status status;
if (acpiphp_disabled)
return;
handle = ACPI_HANDLE(bus->bridge);
if (!handle)
adev = ACPI_COMPANION(bus->bridge);
if (!adev)
return;
handle = adev->handle;
bridge = kzalloc(sizeof(struct acpiphp_bridge), GFP_KERNEL);
if (!bridge) {
acpi_handle_err(handle, "No memory for bridge object\n");
@ -1074,10 +923,10 @@ void acpiphp_enumerate_slots(struct pci_bus *bus)
* parent is going to be handled by pciehp, in which case this
* bridge is not interesting to us either.
*/
mutex_lock(&acpiphp_context_lock);
context = acpiphp_get_context(handle);
acpi_lock_hp_context();
context = acpiphp_get_context(adev);
if (!context) {
mutex_unlock(&acpiphp_context_lock);
acpi_unlock_hp_context();
put_device(&bus->dev);
pci_dev_put(bridge->pci_dev);
kfree(bridge);
@ -1087,17 +936,17 @@ void acpiphp_enumerate_slots(struct pci_bus *bus)
context->bridge = bridge;
/* Get a reference to the parent bridge. */
get_bridge(context->func.parent);
mutex_unlock(&acpiphp_context_lock);
acpi_unlock_hp_context();
}
/* must be added to the list prior to calling register_slot */
/* Must be added to the list prior to calling acpiphp_add_context(). */
mutex_lock(&bridge_mutex);
list_add(&bridge->list, &bridge_list);
mutex_unlock(&bridge_mutex);
/* register all slot objects under this bridge */
status = acpi_walk_namespace(ACPI_TYPE_DEVICE, handle, 1,
register_slot, NULL, bridge, NULL);
acpiphp_add_context, NULL, bridge, NULL);
if (ACPI_FAILURE(status)) {
acpi_handle_err(handle, "failed to register slots\n");
cleanup_bridge(bridge);
@ -1105,7 +954,10 @@ void acpiphp_enumerate_slots(struct pci_bus *bus)
}
}
/* Destroy hotplug slots associated with the PCI bus */
/**
* acpiphp_remove_slots - Remove slot objects associated with a given bus.
* @bus: PCI bus to remove the slot objects for.
*/
void acpiphp_remove_slots(struct pci_bus *bus)
{
struct acpiphp_bridge *bridge;
@ -1136,13 +988,10 @@ int acpiphp_enable_slot(struct acpiphp_slot *slot)
if (slot->flags & SLOT_IS_GOING_AWAY)
return -ENODEV;
mutex_lock(&slot->crit_sect);
/* configure all functions */
if (!(slot->flags & SLOT_ENABLED))
enable_slot(slot);
mutex_unlock(&slot->crit_sect);
pci_unlock_rescan_remove();
return 0;
}
@ -1158,8 +1007,6 @@ static int acpiphp_disable_and_eject_slot(struct acpiphp_slot *slot)
if (slot->flags & SLOT_IS_GOING_AWAY)
return -ENODEV;
mutex_lock(&slot->crit_sect);
/* unconfigure all functions */
disable_slot(slot);
@ -1173,7 +1020,6 @@ static int acpiphp_disable_and_eject_slot(struct acpiphp_slot *slot)
break;
}
mutex_unlock(&slot->crit_sect);
return 0;
}
@ -1181,9 +1027,15 @@ int acpiphp_disable_slot(struct acpiphp_slot *slot)
{
int ret;
/*
* Acquire acpi_scan_lock to ensure that the execution of _EJ0 in
* acpiphp_disable_and_eject_slot() will be synchronized properly.
*/
acpi_scan_lock_acquire();
pci_lock_rescan_remove();
ret = acpiphp_disable_and_eject_slot(slot);
pci_unlock_rescan_remove();
acpi_scan_lock_release();
return ret;
}

27
include/acpi/acpi_bus.h
View File

@ -144,6 +144,16 @@ struct acpi_scan_handler {
struct acpi_hotplug_profile hotplug;
};
/*
* ACPI Hotplug Context
* --------------------
*/
struct acpi_hotplug_context {
struct acpi_device *self;
int (*event)(struct acpi_device *, u32);
};
/*
* ACPI Driver
* -----------
@ -198,7 +208,8 @@ struct acpi_device_flags {
u32 initialized:1;
u32 visited:1;
u32 no_hotplug:1;
u32 reserved:24;
u32 hotplug_notify:1;
u32 reserved:23;
};
/* File System */
@ -337,6 +348,7 @@ struct acpi_device {
struct acpi_device_perf performance;
struct acpi_device_dir dir;
struct acpi_scan_handler *handler;
struct acpi_hotplug_context *hp;
struct acpi_driver *driver;
void *driver_data;
struct device dev;
@ -359,6 +371,15 @@ static inline void acpi_set_device_status(struct acpi_device *adev, u32 sta)
*((u32 *)&adev->status) = sta;
}
static inline void acpi_set_hp_context(struct acpi_device *adev,
struct acpi_hotplug_context *hp,
int (*event)(struct acpi_device *, u32))
{
hp->self = adev;
hp->event = event;
adev->hp = hp;
}
/* acpi_device.dev.bus == &acpi_bus_type */
extern struct bus_type acpi_bus_type;
@ -389,6 +410,8 @@ extern int unregister_acpi_notifier(struct notifier_block *);
*/
int acpi_bus_get_device(acpi_handle handle, struct acpi_device **device);
struct acpi_device *acpi_bus_get_acpi_device(acpi_handle handle);
void acpi_bus_put_acpi_device(struct acpi_device *adev);
acpi_status acpi_bus_get_status_handle(acpi_handle handle,
unsigned long long *sta);
int acpi_bus_get_status(struct acpi_device *device);
@ -410,6 +433,8 @@ static inline bool acpi_bus_can_wakeup(acpi_handle handle) { return false; }
void acpi_scan_lock_acquire(void);
void acpi_scan_lock_release(void);
void acpi_lock_hp_context(void);
void acpi_unlock_hp_context(void);
int acpi_scan_add_handler(struct acpi_scan_handler *handler);
int acpi_bus_register_driver(struct acpi_driver *driver);
void acpi_bus_unregister_driver(struct acpi_driver *driver);

4
include/acpi/acpixf.h
View File

@ -229,6 +229,10 @@ acpi_attach_data(acpi_handle object, acpi_object_handler handler, void *data);
acpi_status acpi_detach_data(acpi_handle object, acpi_object_handler handler);
acpi_status
acpi_get_data_full(acpi_handle object, acpi_object_handler handler, void **data,
void (*callback)(void *));
acpi_status
acpi_get_data(acpi_handle object, acpi_object_handler handler, void **data);

4
include/linux/pci-acpi.h
View File

@ -59,12 +59,12 @@ static inline void acpi_pci_slot_remove(struct pci_bus *bus) { }
void acpiphp_init(void);
void acpiphp_enumerate_slots(struct pci_bus *bus);
void acpiphp_remove_slots(struct pci_bus *bus);
void acpiphp_check_host_bridge(acpi_handle handle);
void acpiphp_check_host_bridge(struct acpi_device *adev);
#else
static inline void acpiphp_init(void) { }
static inline void acpiphp_enumerate_slots(struct pci_bus *bus) { }
static inline void acpiphp_remove_slots(struct pci_bus *bus) { }
static inline void acpiphp_check_host_bridge(acpi_handle handle) { }
static inline void acpiphp_check_host_bridge(struct acpi_device *adev) { }
#endif
#else /* CONFIG_ACPI */