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-rw-r--r--drivers/acpi/scan.c137
-rw-r--r--drivers/pci/hotplug/acpiphp.h9
-rw-r--r--drivers/pci/hotplug/acpiphp_glue.c168
-rw-r--r--include/acpi/acpi_bus.h25
4 files changed, 158 insertions, 181 deletions
diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c
index d64a5826ef35..984eaff235df 100644
--- a/drivers/acpi/scan.c
+++ b/drivers/acpi/scan.c
@@ -450,43 +450,61 @@ static int acpi_scan_bus_check(struct acpi_device *adev)
return 0;
}
+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:
+ return acpi_scan_hot_remove(adev);
+ }
+ return -EINVAL;
+}
+
static 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);
+ } 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);
+
+ out:
acpi_bus_put_acpi_device(adev);
mutex_unlock(&acpi_scan_lock);
unlock_device_hotplug();
@@ -494,8 +512,8 @@ static void acpi_device_hotplug(void *data, u32 src)
static void acpi_hotplug_notify_cb(acpi_handle handle, u32 type, void *data)
{
- u32 ost_code = ACPI_OST_SC_NON_SPECIFIC_FAILURE;
struct acpi_scan_handler *handler = data;
+ u32 ost_code = ACPI_OST_SC_SUCCESS;
struct acpi_device *adev;
acpi_status status;
@@ -503,26 +521,49 @@ static void acpi_hotplug_notify_cb(acpi_handle handle, u32 type, void *data)
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 (!handler->hotplug.enabled) {
+ if (handler && !handler->hotplug.enabled) {
acpi_handle_err(handle, "Eject disabled\n");
ost_code = ACPI_OST_SC_EJECT_NOT_SUPPORTED;
- goto err_out;
+ goto 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 */
+
+ 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;
}
+
+ ost_code = ACPI_OST_SC_NON_SPECIFIC_FAILURE;
adev = acpi_bus_get_acpi_device(handle);
if (!adev)
- goto err_out;
+ goto out;
status = acpi_hotplug_execute(acpi_device_hotplug, adev, type);
if (ACPI_SUCCESS(status))
@@ -530,10 +571,22 @@ static void acpi_hotplug_notify_cb(acpi_handle handle, u32 type, void *data)
acpi_bus_put_acpi_device(adev);
- err_out:
+ out:
acpi_evaluate_hotplug_ost(handle, type, ost_code, NULL);
}
+void acpi_install_hotplug_notify_handler(acpi_handle handle, void *data)
+{
+ acpi_install_notify_handler(handle, ACPI_SYSTEM_NOTIFY,
+ acpi_hotplug_notify_cb, data);
+}
+
+void acpi_remove_hotplug_notify_handler(acpi_handle handle)
+{
+ acpi_remove_notify_handler(handle, ACPI_SYSTEM_NOTIFY,
+ acpi_hotplug_notify_cb);
+}
+
static ssize_t real_power_state_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
@@ -1976,33 +2029,21 @@ 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;
- struct acpi_scan_handler *handler;
- INIT_LIST_HEAD(&pnp.ids);
- acpi_set_pnp_ids(handle, &pnp, type);
-
- if (!pnp.type.hardware_id)
- goto out;
+ list_for_each_entry(hwid, &adev->pnp.ids, list) {
+ struct acpi_scan_handler *handler;
- /*
- * 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);
- break;
- }
- }
+ if (!handler)
+ continue;
-out:
- acpi_free_pnp_ids(&pnp);
+ acpi_install_hotplug_notify_handler(adev->handle, handler);
+ adev->flags.hotplug_notify = true;
+ break;
+ }
}
static acpi_status acpi_bus_check_add(acpi_handle handle, u32 lvl_not_used,
@@ -2026,12 +2067,12 @@ 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;
diff --git a/drivers/pci/hotplug/acpiphp.h b/drivers/pci/hotplug/acpiphp.h
index 373c7aa3b4a6..d7c1fc9712ad 100644
--- a/drivers/pci/hotplug/acpiphp.h
+++ b/drivers/pci/hotplug/acpiphp.h
@@ -116,12 +116,17 @@ struct acpiphp_func {
};
struct acpiphp_context {
+ struct acpi_hotplug_context hp;
struct acpiphp_func func;
- struct acpi_device *adev;
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);
@@ -129,7 +134,7 @@ static inline struct acpiphp_context *func_to_context(struct acpiphp_func *func)
static inline struct acpi_device *func_to_acpi_device(struct acpiphp_func *func)
{
- return func_to_context(func)->adev;
+ return func_to_context(func)->hp.self;
}
static inline acpi_handle func_to_handle(struct acpiphp_func *func)
diff --git a/drivers/pci/hotplug/acpiphp_glue.c b/drivers/pci/hotplug/acpiphp_glue.c
index 8139a4b0d389..7c498d663eb3 100644
--- a/drivers/pci/hotplug/acpiphp_glue.c
+++ b/drivers/pci/hotplug/acpiphp_glue.c
@@ -59,17 +59,12 @@
static LIST_HEAD(bridge_list);
static DEFINE_MUTEX(bridge_mutex);
-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(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.
* @adev: ACPI device object to create the context for.
@@ -79,39 +74,31 @@ static void acpiphp_context_handler(acpi_handle handle, void *context)
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->adev = adev;
context->refcount = 1;
- status = acpi_attach_data(adev->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 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;
- context->refcount++;
- }
+ if (!adev->hp)
+ return NULL;
+
+ context = to_acpiphp_context(adev->hp);
+ context->refcount++;
return context;
}
@@ -129,7 +116,7 @@ static void acpiphp_put_context(struct acpiphp_context *context)
return;
WARN_ON(context->bridge);
- acpi_detach_data(context->adev->handle, acpiphp_context_handler);
+ context->hp.self->hp = NULL;
kfree(context);
}
@@ -211,22 +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;
- acpi_lock_hp_context();
- context = acpiphp_get_context(handle);
- if (!context || WARN_ON(context->adev->handle != handle)
- || context->func.parent->is_going_away) {
- acpi_unlock_hp_context();
- 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);
- acpi_unlock_hp_context();
-
- hotplug_event(type, context);
-
- put_bridge(context->func.parent);
}
static const struct acpi_dock_ops acpiphp_dock_ops = {
@@ -397,25 +375,23 @@ static acpi_status register_slot(acpi_handle handle, u32 lvl, void *data,
}
/* 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");
- }
+ if (!(newfunc->flags & FUNC_HAS_DCK))
+ acpi_install_hotplug_notify_handler(handle, NULL);
return AE_OK;
}
static struct acpiphp_bridge *acpiphp_handle_to_bridge(acpi_handle handle)
{
+ struct acpi_device *adev = acpi_bus_get_acpi_device(handle);
struct acpiphp_context *context;
struct acpiphp_bridge *bridge = NULL;
+ if (!adev)
+ return NULL;
+
acpi_lock_hp_context();
- context = acpiphp_get_context(handle);
+ context = acpiphp_get_context(adev);
if (context) {
bridge = context->bridge;
if (bridge)
@@ -424,6 +400,7 @@ static struct acpiphp_bridge *acpiphp_handle_to_bridge(acpi_handle handle)
acpiphp_put_context(context);
}
acpi_unlock_hp_context();
+ acpi_bus_put_acpi_device(adev);
return bridge;
}
@@ -431,7 +408,6 @@ 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) {
@@ -440,13 +416,8 @@ static void cleanup_bridge(struct acpiphp_bridge *bridge)
if (is_dock_device(handle))
unregister_hotplug_dock_device(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");
- }
+ if (!(func->flags & FUNC_HAS_DCK))
+ acpi_remove_hotplug_notify_handler(handle);
}
slot->flags |= SLOT_IS_GOING_AWAY;
if (slot->slot)
@@ -814,7 +785,7 @@ static int acpiphp_disable_and_eject_slot(struct acpiphp_slot *slot);
static void hotplug_event(u32 type, struct acpiphp_context *context)
{
- acpi_handle handle = context->adev->handle;
+ acpi_handle handle = context->hp.self->handle;
struct acpiphp_func *func = &context->func;
struct acpiphp_slot *slot = func->slot;
struct acpiphp_bridge *bridge;
@@ -866,87 +837,24 @@ static void hotplug_event(u32 type, struct acpiphp_context *context)
put_bridge(bridge);
}
-static void hotplug_event_work(void *data, u32 type)
-{
- struct acpiphp_context *context = data;
-
- acpi_scan_lock_acquire();
-
- hotplug_event(type, context);
-
- acpi_scan_lock_release();
- acpi_evaluate_hotplug_ost(context->adev->handle, type,
- ACPI_OST_SC_SUCCESS, NULL);
- put_bridge(context->func.parent);
-}
-
-/**
- * handle_hotplug_event - handle ACPI hotplug event
- * @handle: Notify()'ed acpi_handle
- * @type: Notify code
- * @data: pointer to acpiphp_context structure
- *
- * Handles ACPI event notification on slots.
- */
-static void handle_hotplug_event(acpi_handle handle, u32 type, void *data)
+static int acpiphp_hotplug_event(struct acpi_device *adev, u32 type)
{
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;
- }
acpi_lock_hp_context();
- context = acpiphp_get_context(handle);
- if (!context || WARN_ON(context->adev->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)) {
+ context = acpiphp_get_context(adev);
+ if (!context || context->func.parent->is_going_away) {
acpi_unlock_hp_context();
- return;
+ return -ENODATA;
}
- put_bridge(context->func.parent);
-
- err_out:
+ get_bridge(context->func.parent);
+ acpiphp_put_context(context);
acpi_unlock_hp_context();
- ost_code = ACPI_OST_SC_NON_SPECIFIC_FAILURE;
- out:
- acpi_evaluate_hotplug_ost(handle, type, ost_code, NULL);
+ hotplug_event(type, context);
+
+ put_bridge(context->func.parent);
+ return 0;
}
/**
@@ -999,7 +907,7 @@ void acpiphp_enumerate_slots(struct pci_bus *bus)
* bridge is not interesting to us either.
*/
acpi_lock_hp_context();
- context = acpiphp_get_context(handle);
+ context = acpiphp_get_context(adev);
if (!context) {
acpi_unlock_hp_context();
put_device(&bus->dev);
diff --git a/include/acpi/acpi_bus.h b/include/acpi/acpi_bus.h
index 0c82708ff08a..53ce357f6335 100644
--- a/include/acpi/acpi_bus.h
+++ b/include/acpi/acpi_bus.h
@@ -137,6 +137,16 @@ struct acpi_scan_handler {
};
/*
+ * ACPI Hotplug Context
+ * --------------------
+ */
+
+struct acpi_hotplug_context {
+ struct acpi_device *self;
+ int (*event)(struct acpi_device *, u32);
+};
+
+/*
* ACPI Driver
* -----------
*/
@@ -190,7 +200,8 @@ 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 */
@@ -329,6 +340,7 @@ 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;
@@ -351,6 +363,15 @@ 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;
@@ -425,6 +446,8 @@ static inline bool acpi_device_enumerated(struct acpi_device *adev)
typedef void (*acpi_hp_callback)(void *data, u32 src);
acpi_status acpi_hotplug_execute(acpi_hp_callback func, void *data, u32 src);
+void acpi_install_hotplug_notify_handler(acpi_handle handle, void *data);
+void acpi_remove_hotplug_notify_handler(acpi_handle handle);
/**
* module_acpi_driver(acpi_driver) - Helper macro for registering an ACPI driver
generated by cgit (git 2.34.1) at 2024-06-30 07:32:20 +0000