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-rw-r--r--drivers/acpi/Makefile5
-rw-r--r--drivers/acpi/acpi_fpdt.c4
-rw-r--r--drivers/acpi/bgrt.c57
-rw-r--r--drivers/acpi/bus.c5
-rw-r--r--drivers/acpi/ec.c2
-rw-r--r--drivers/acpi/internal.h2
-rw-r--r--drivers/acpi/pmic/intel_pmic_chtdc_ti.c2
-rw-r--r--drivers/acpi/pptt.c18
-rw-r--r--drivers/acpi/scan.c303
9 files changed, 250 insertions, 148 deletions
diff --git a/drivers/acpi/Makefile b/drivers/acpi/Makefile
index 700b41adf2db..9aa82d527272 100644
--- a/drivers/acpi/Makefile
+++ b/drivers/acpi/Makefile
@@ -8,6 +8,11 @@ ccflags-$(CONFIG_ACPI_DEBUG) += -DACPI_DEBUG_OUTPUT
#
# ACPI Boot-Time Table Parsing
#
+ifeq ($(CONFIG_ACPI_CUSTOM_DSDT),y)
+tables.o: $(src)/../../include/$(subst $\",,$(CONFIG_ACPI_CUSTOM_DSDT_FILE)) ;
+
+endif
+
obj-$(CONFIG_ACPI) += tables.o
obj-$(CONFIG_X86) += blacklist.o
diff --git a/drivers/acpi/acpi_fpdt.c b/drivers/acpi/acpi_fpdt.c
index a89a806a7a2a..4ee2ad234e3d 100644
--- a/drivers/acpi/acpi_fpdt.c
+++ b/drivers/acpi/acpi_fpdt.c
@@ -240,8 +240,10 @@ static int __init acpi_init_fpdt(void)
return 0;
fpdt_kobj = kobject_create_and_add("fpdt", acpi_kobj);
- if (!fpdt_kobj)
+ if (!fpdt_kobj) {
+ acpi_put_table(header);
return -ENOMEM;
+ }
while (offset < header->length) {
subtable = (void *)header + offset;
diff --git a/drivers/acpi/bgrt.c b/drivers/acpi/bgrt.c
index 19bb7f870204..02d208732f9a 100644
--- a/drivers/acpi/bgrt.c
+++ b/drivers/acpi/bgrt.c
@@ -15,40 +15,19 @@
static void *bgrt_image;
static struct kobject *bgrt_kobj;
-static ssize_t version_show(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- return snprintf(buf, PAGE_SIZE, "%d\n", bgrt_tab.version);
-}
-static DEVICE_ATTR_RO(version);
-
-static ssize_t status_show(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- return snprintf(buf, PAGE_SIZE, "%d\n", bgrt_tab.status);
-}
-static DEVICE_ATTR_RO(status);
-
-static ssize_t type_show(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- return snprintf(buf, PAGE_SIZE, "%d\n", bgrt_tab.image_type);
-}
-static DEVICE_ATTR_RO(type);
-
-static ssize_t xoffset_show(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- return snprintf(buf, PAGE_SIZE, "%d\n", bgrt_tab.image_offset_x);
-}
-static DEVICE_ATTR_RO(xoffset);
-
-static ssize_t yoffset_show(struct device *dev,
- struct device_attribute *attr, char *buf)
-{
- return snprintf(buf, PAGE_SIZE, "%d\n", bgrt_tab.image_offset_y);
-}
-static DEVICE_ATTR_RO(yoffset);
+#define BGRT_SHOW(_name, _member) \
+ static ssize_t _name##_show(struct kobject *kobj, \
+ struct kobj_attribute *attr, char *buf) \
+ { \
+ return sysfs_emit(buf, "%d\n", bgrt_tab._member); \
+ } \
+ struct kobj_attribute bgrt_attr_##_name = __ATTR_RO(_name)
+
+BGRT_SHOW(version, version);
+BGRT_SHOW(status, status);
+BGRT_SHOW(type, image_type);
+BGRT_SHOW(xoffset, image_offset_x);
+BGRT_SHOW(yoffset, image_offset_y);
static ssize_t image_read(struct file *file, struct kobject *kobj,
struct bin_attribute *attr, char *buf, loff_t off, size_t count)
@@ -60,11 +39,11 @@ static ssize_t image_read(struct file *file, struct kobject *kobj,
static BIN_ATTR_RO(image, 0); /* size gets filled in later */
static struct attribute *bgrt_attributes[] = {
- &dev_attr_version.attr,
- &dev_attr_status.attr,
- &dev_attr_type.attr,
- &dev_attr_xoffset.attr,
- &dev_attr_yoffset.attr,
+ &bgrt_attr_version.attr,
+ &bgrt_attr_status.attr,
+ &bgrt_attr_type.attr,
+ &bgrt_attr_xoffset.attr,
+ &bgrt_attr_yoffset.attr,
NULL,
};
diff --git a/drivers/acpi/bus.c b/drivers/acpi/bus.c
index a4bd673934c0..278418ea3a19 100644
--- a/drivers/acpi/bus.c
+++ b/drivers/acpi/bus.c
@@ -262,8 +262,6 @@ out_success:
out_kfree:
kfree(output.pointer);
- if (status != AE_OK)
- context->ret.pointer = NULL;
return status;
}
EXPORT_SYMBOL(acpi_run_osc);
@@ -1195,7 +1193,8 @@ void __init acpi_subsystem_init(void)
static acpi_status acpi_bus_table_handler(u32 event, void *table, void *context)
{
- acpi_scan_table_handler(event, table, context);
+ if (event == ACPI_TABLE_EVENT_LOAD)
+ acpi_scan_table_notify();
return acpi_sysfs_table_handler(event, table, context);
}
diff --git a/drivers/acpi/ec.c b/drivers/acpi/ec.c
index 13565629ce0a..3f7680a007a3 100644
--- a/drivers/acpi/ec.c
+++ b/drivers/acpi/ec.c
@@ -1627,7 +1627,7 @@ static int acpi_ec_add(struct acpi_device *device)
WARN(!ret, "Could not request EC cmd io port 0x%lx", ec->command_addr);
/* Reprobe devices depending on the EC */
- acpi_walk_dep_device_list(ec->handle);
+ acpi_dev_clear_dependencies(device);
acpi_handle_debug(ec->handle, "enumerated.\n");
return 0;
diff --git a/drivers/acpi/internal.h b/drivers/acpi/internal.h
index e21611c9a170..231001b0c2a0 100644
--- a/drivers/acpi/internal.h
+++ b/drivers/acpi/internal.h
@@ -88,7 +88,7 @@ void acpi_device_hotplug(struct acpi_device *adev, u32 src);
bool acpi_scan_is_offline(struct acpi_device *adev, bool uevent);
acpi_status acpi_sysfs_table_handler(u32 event, void *table, void *context);
-void acpi_scan_table_handler(u32 event, void *table, void *context);
+void acpi_scan_table_notify(void);
/* --------------------------------------------------------------------------
Device Node Initialization / Removal
diff --git a/drivers/acpi/pmic/intel_pmic_chtdc_ti.c b/drivers/acpi/pmic/intel_pmic_chtdc_ti.c
index a5101b07611a..fef7831d0d63 100644
--- a/drivers/acpi/pmic/intel_pmic_chtdc_ti.c
+++ b/drivers/acpi/pmic/intel_pmic_chtdc_ti.c
@@ -117,7 +117,7 @@ static int chtdc_ti_pmic_opregion_probe(struct platform_device *pdev)
return err;
/* Re-enumerate devices depending on PMIC */
- acpi_walk_dep_device_list(ACPI_HANDLE(pdev->dev.parent));
+ acpi_dev_clear_dependencies(ACPI_COMPANION(pdev->dev.parent));
return 0;
}
diff --git a/drivers/acpi/pptt.c b/drivers/acpi/pptt.c
index 4ae93350b70d..fe69dc518f31 100644
--- a/drivers/acpi/pptt.c
+++ b/drivers/acpi/pptt.c
@@ -347,6 +347,7 @@ static struct acpi_pptt_cache *acpi_find_cache_node(struct acpi_table_header *ta
* @this_leaf: Kernel cache info structure being updated
* @found_cache: The PPTT node describing this cache instance
* @cpu_node: A unique reference to describe this cache instance
+ * @revision: The revision of the PPTT table
*
* The ACPI spec implies that the fields in the cache structures are used to
* extend and correct the information probed from the hardware. Lets only
@@ -356,8 +357,11 @@ static struct acpi_pptt_cache *acpi_find_cache_node(struct acpi_table_header *ta
*/
static void update_cache_properties(struct cacheinfo *this_leaf,
struct acpi_pptt_cache *found_cache,
- struct acpi_pptt_processor *cpu_node)
+ struct acpi_pptt_processor *cpu_node,
+ u8 revision)
{
+ struct acpi_pptt_cache_v1* found_cache_v1;
+
this_leaf->fw_token = cpu_node;
if (found_cache->flags & ACPI_PPTT_SIZE_PROPERTY_VALID)
this_leaf->size = found_cache->size;
@@ -405,6 +409,13 @@ static void update_cache_properties(struct cacheinfo *this_leaf,
if (this_leaf->type == CACHE_TYPE_NOCACHE &&
found_cache->flags & ACPI_PPTT_CACHE_TYPE_VALID)
this_leaf->type = CACHE_TYPE_UNIFIED;
+
+ if (revision >= 3 && (found_cache->flags & ACPI_PPTT_CACHE_ID_VALID)) {
+ found_cache_v1 = ACPI_ADD_PTR(struct acpi_pptt_cache_v1,
+ found_cache, sizeof(struct acpi_pptt_cache));
+ this_leaf->id = found_cache_v1->cache_id;
+ this_leaf->attributes |= CACHE_ID;
+ }
}
static void cache_setup_acpi_cpu(struct acpi_table_header *table,
@@ -425,9 +436,8 @@ static void cache_setup_acpi_cpu(struct acpi_table_header *table,
&cpu_node);
pr_debug("found = %p %p\n", found_cache, cpu_node);
if (found_cache)
- update_cache_properties(this_leaf,
- found_cache,
- cpu_node);
+ update_cache_properties(this_leaf, found_cache,
+ cpu_node, table->revision);
index++;
}
diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c
index e10d38ac7cf2..9ec1326d0d6d 100644
--- a/drivers/acpi/scan.c
+++ b/drivers/acpi/scan.c
@@ -47,12 +47,6 @@ static DEFINE_MUTEX(acpi_hp_context_lock);
*/
static u64 spcr_uart_addr;
-struct acpi_dep_data {
- struct list_head node;
- acpi_handle supplier;
- acpi_handle consumer;
-};
-
void acpi_scan_lock_acquire(void)
{
mutex_lock(&acpi_scan_lock);
@@ -612,11 +606,6 @@ struct acpi_device *acpi_bus_get_acpi_device(acpi_handle handle)
return handle_to_device(handle, get_acpi_device);
}
-void acpi_bus_put_acpi_device(struct acpi_device *adev)
-{
- acpi_dev_put(adev);
-}
-
static struct acpi_device_bus_id *acpi_device_bus_id_match(const char *dev_id)
{
struct acpi_device_bus_id *acpi_device_bus_id;
@@ -644,24 +633,29 @@ static int acpi_device_set_name(struct acpi_device *device,
return 0;
}
-int acpi_device_add(struct acpi_device *device,
- void (*release)(struct device *))
+static int acpi_tie_acpi_dev(struct acpi_device *adev)
{
- struct acpi_device_bus_id *acpi_device_bus_id;
- int result;
+ acpi_handle handle = adev->handle;
+ acpi_status status;
- if (device->handle) {
- acpi_status status;
+ if (!handle)
+ return 0;
- status = acpi_attach_data(device->handle, acpi_scan_drop_device,
- device);
- if (ACPI_FAILURE(status)) {
- acpi_handle_err(device->handle,
- "Unable to attach device data\n");
- return -ENODEV;
- }
+ status = acpi_attach_data(handle, acpi_scan_drop_device, adev);
+ if (ACPI_FAILURE(status)) {
+ acpi_handle_err(handle, "Unable to attach device data\n");
+ return -ENODEV;
}
+ return 0;
+}
+
+static int __acpi_device_add(struct acpi_device *device,
+ void (*release)(struct device *))
+{
+ struct acpi_device_bus_id *acpi_device_bus_id;
+ int result;
+
/*
* Linkage
* -------
@@ -750,6 +744,17 @@ err_unlock:
return result;
}
+int acpi_device_add(struct acpi_device *adev, void (*release)(struct device *))
+{
+ int ret;
+
+ ret = acpi_tie_acpi_dev(adev);
+ if (ret)
+ return ret;
+
+ return __acpi_device_add(adev, release);
+}
+
/* --------------------------------------------------------------------------
Device Enumeration
-------------------------------------------------------------------------- */
@@ -1671,8 +1676,16 @@ void acpi_init_device_object(struct acpi_device *device, acpi_handle handle,
device_initialize(&device->dev);
dev_set_uevent_suppress(&device->dev, true);
acpi_init_coherency(device);
- /* Assume there are unmet deps to start with. */
- device->dep_unmet = 1;
+}
+
+static void acpi_scan_dep_init(struct acpi_device *adev)
+{
+ struct acpi_dep_data *dep;
+
+ list_for_each_entry(dep, &acpi_dep_list, node) {
+ if (dep->consumer == adev->handle)
+ adev->dep_unmet++;
+ }
}
void acpi_device_add_finalize(struct acpi_device *device)
@@ -1688,9 +1701,10 @@ static void acpi_scan_init_status(struct acpi_device *adev)
}
static int acpi_add_single_object(struct acpi_device **child,
- acpi_handle handle, int type)
+ acpi_handle handle, int type, bool dep_init)
{
struct acpi_device *device;
+ bool release_dep_lock = false;
int result;
device = kzalloc(sizeof(struct acpi_device), GFP_KERNEL);
@@ -1703,13 +1717,32 @@ static int acpi_add_single_object(struct acpi_device **child,
* acpi_bus_get_status() and use its quirk handling. Note that
* this must be done before the get power-/wakeup_dev-flags calls.
*/
- if (type == ACPI_BUS_TYPE_DEVICE || type == ACPI_BUS_TYPE_PROCESSOR)
+ if (type == ACPI_BUS_TYPE_DEVICE || type == ACPI_BUS_TYPE_PROCESSOR) {
+ if (dep_init) {
+ mutex_lock(&acpi_dep_list_lock);
+ /*
+ * Hold the lock until the acpi_tie_acpi_dev() call
+ * below to prevent concurrent acpi_scan_clear_dep()
+ * from deleting a dependency list entry without
+ * updating dep_unmet for the device.
+ */
+ release_dep_lock = true;
+ acpi_scan_dep_init(device);
+ }
acpi_scan_init_status(device);
+ }
acpi_bus_get_power_flags(device);
acpi_bus_get_wakeup_device_flags(device);
- result = acpi_device_add(device, acpi_device_release);
+ result = acpi_tie_acpi_dev(device);
+
+ if (release_dep_lock)
+ mutex_unlock(&acpi_dep_list_lock);
+
+ if (!result)
+ result = __acpi_device_add(device, acpi_device_release);
+
if (result) {
acpi_device_release(&device->dev);
return result;
@@ -1886,22 +1919,6 @@ static u32 acpi_scan_check_dep(acpi_handle handle, bool check_dep)
return count;
}
-static void acpi_scan_dep_init(struct acpi_device *adev)
-{
- struct acpi_dep_data *dep;
-
- adev->dep_unmet = 0;
-
- mutex_lock(&acpi_dep_list_lock);
-
- list_for_each_entry(dep, &acpi_dep_list, node) {
- if (dep->consumer == adev->handle)
- adev->dep_unmet++;
- }
-
- mutex_unlock(&acpi_dep_list_lock);
-}
-
static bool acpi_bus_scan_second_pass;
static acpi_status acpi_bus_check_add(acpi_handle handle, bool check_dep,
@@ -1949,19 +1966,15 @@ static acpi_status acpi_bus_check_add(acpi_handle handle, bool check_dep,
return AE_OK;
}
- acpi_add_single_object(&device, handle, type);
- if (!device)
- return AE_CTRL_DEPTH;
-
- acpi_scan_init_hotplug(device);
/*
* If check_dep is true at this point, the device has no dependencies,
* or the creation of the device object would have been postponed above.
*/
- if (check_dep)
- device->dep_unmet = 0;
- else
- acpi_scan_dep_init(device);
+ acpi_add_single_object(&device, handle, type, !check_dep);
+ if (!device)
+ return AE_CTRL_DEPTH;
+
+ acpi_scan_init_hotplug(device);
out:
if (!*adev_p)
@@ -2111,29 +2124,141 @@ static void acpi_bus_attach(struct acpi_device *device, bool first_pass)
device->handler->hotplug.notify_online(device);
}
-void acpi_walk_dep_device_list(acpi_handle handle)
+static int acpi_dev_get_first_consumer_dev_cb(struct acpi_dep_data *dep, void *data)
{
- struct acpi_dep_data *dep, *tmp;
struct acpi_device *adev;
+ adev = acpi_bus_get_acpi_device(dep->consumer);
+ if (adev) {
+ *(struct acpi_device **)data = adev;
+ return 1;
+ }
+ /* Continue parsing if the device object is not present. */
+ return 0;
+}
+
+struct acpi_scan_clear_dep_work {
+ struct work_struct work;
+ struct acpi_device *adev;
+};
+
+static void acpi_scan_clear_dep_fn(struct work_struct *work)
+{
+ struct acpi_scan_clear_dep_work *cdw;
+
+ cdw = container_of(work, struct acpi_scan_clear_dep_work, work);
+
+ acpi_scan_lock_acquire();
+ acpi_bus_attach(cdw->adev, true);
+ acpi_scan_lock_release();
+
+ acpi_dev_put(cdw->adev);
+ kfree(cdw);
+}
+
+static bool acpi_scan_clear_dep_queue(struct acpi_device *adev)
+{
+ struct acpi_scan_clear_dep_work *cdw;
+
+ if (adev->dep_unmet)
+ return false;
+
+ cdw = kmalloc(sizeof(*cdw), GFP_KERNEL);
+ if (!cdw)
+ return false;
+
+ cdw->adev = adev;
+ INIT_WORK(&cdw->work, acpi_scan_clear_dep_fn);
+ /*
+ * Since the work function may block on the lock until the entire
+ * initial enumeration of devices is complete, put it into the unbound
+ * workqueue.
+ */
+ queue_work(system_unbound_wq, &cdw->work);
+
+ return true;
+}
+
+static int acpi_scan_clear_dep(struct acpi_dep_data *dep, void *data)
+{
+ struct acpi_device *adev = acpi_bus_get_acpi_device(dep->consumer);
+
+ if (adev) {
+ adev->dep_unmet--;
+ if (!acpi_scan_clear_dep_queue(adev))
+ acpi_dev_put(adev);
+ }
+
+ list_del(&dep->node);
+ kfree(dep);
+
+ return 0;
+}
+
+/**
+ * acpi_walk_dep_device_list - Apply a callback to every entry in acpi_dep_list
+ * @handle: The ACPI handle of the supplier device
+ * @callback: Pointer to the callback function to apply
+ * @data: Pointer to some data to pass to the callback
+ *
+ * The return value of the callback determines this function's behaviour. If 0
+ * is returned we continue to iterate over acpi_dep_list. If a positive value
+ * is returned then the loop is broken but this function returns 0. If a
+ * negative value is returned by the callback then the loop is broken and that
+ * value is returned as the final error.
+ */
+static int acpi_walk_dep_device_list(acpi_handle handle,
+ int (*callback)(struct acpi_dep_data *, void *),
+ void *data)
+{
+ struct acpi_dep_data *dep, *tmp;
+ int ret = 0;
+
mutex_lock(&acpi_dep_list_lock);
list_for_each_entry_safe(dep, tmp, &acpi_dep_list, node) {
if (dep->supplier == handle) {
- acpi_bus_get_device(dep->consumer, &adev);
-
- if (adev) {
- adev->dep_unmet--;
- if (!adev->dep_unmet)
- acpi_bus_attach(adev, true);
- }
-
- list_del(&dep->node);
- kfree(dep);
+ ret = callback(dep, data);
+ if (ret)
+ break;
}
}
mutex_unlock(&acpi_dep_list_lock);
+
+ return ret > 0 ? 0 : ret;
+}
+
+/**
+ * acpi_dev_clear_dependencies - Inform consumers that the device is now active
+ * @supplier: Pointer to the supplier &struct acpi_device
+ *
+ * Clear dependencies on the given device.
+ */
+void acpi_dev_clear_dependencies(struct acpi_device *supplier)
+{
+ acpi_walk_dep_device_list(supplier->handle, acpi_scan_clear_dep, NULL);
+}
+EXPORT_SYMBOL_GPL(acpi_dev_clear_dependencies);
+
+/**
+ * acpi_dev_get_first_consumer_dev - Return ACPI device dependent on @supplier
+ * @supplier: Pointer to the dependee device
+ *
+ * Returns the first &struct acpi_device which declares itself dependent on
+ * @supplier via the _DEP buffer, parsed from the acpi_dep_list.
+ *
+ * The caller is responsible for putting the reference to adev when it is no
+ * longer needed.
+ */
+struct acpi_device *acpi_dev_get_first_consumer_dev(struct acpi_device *supplier)
+{
+ struct acpi_device *adev = NULL;
+
+ acpi_walk_dep_device_list(supplier->handle,
+ acpi_dev_get_first_consumer_dev_cb, &adev);
+
+ return adev;
}
-EXPORT_SYMBOL_GPL(acpi_walk_dep_device_list);
+EXPORT_SYMBOL_GPL(acpi_dev_get_first_consumer_dev);
/**
* acpi_bus_scan - Add ACPI device node objects in a given namespace scope.
@@ -2223,7 +2348,7 @@ int acpi_bus_register_early_device(int type)
struct acpi_device *device = NULL;
int result;
- result = acpi_add_single_object(&device, NULL, type);
+ result = acpi_add_single_object(&device, NULL, type, false);
if (result)
return result;
@@ -2243,7 +2368,7 @@ static int acpi_bus_scan_fixed(void)
struct acpi_device *device = NULL;
result = acpi_add_single_object(&device, NULL,
- ACPI_BUS_TYPE_POWER_BUTTON);
+ ACPI_BUS_TYPE_POWER_BUTTON, false);
if (result)
return result;
@@ -2259,7 +2384,7 @@ static int acpi_bus_scan_fixed(void)
struct acpi_device *device = NULL;
result = acpi_add_single_object(&device, NULL,
- ACPI_BUS_TYPE_SLEEP_BUTTON);
+ ACPI_BUS_TYPE_SLEEP_BUTTON, false);
if (result)
return result;
@@ -2408,46 +2533,28 @@ int __init __acpi_probe_device_table(struct acpi_probe_entry *ap_head, int nr)
return count;
}
-struct acpi_table_events_work {
- struct work_struct work;
- void *table;
- u32 event;
-};
-
static void acpi_table_events_fn(struct work_struct *work)
{
- struct acpi_table_events_work *tew;
+ acpi_scan_lock_acquire();
+ acpi_bus_scan(ACPI_ROOT_OBJECT);
+ acpi_scan_lock_release();
- tew = container_of(work, struct acpi_table_events_work, work);
-
- if (tew->event == ACPI_TABLE_EVENT_LOAD) {
- acpi_scan_lock_acquire();
- acpi_bus_scan(ACPI_ROOT_OBJECT);
- acpi_scan_lock_release();
- }
-
- kfree(tew);
+ kfree(work);
}
-void acpi_scan_table_handler(u32 event, void *table, void *context)
+void acpi_scan_table_notify(void)
{
- struct acpi_table_events_work *tew;
+ struct work_struct *work;
if (!acpi_scan_initialized)
return;
- if (event != ACPI_TABLE_EVENT_LOAD)
- return;
-
- tew = kmalloc(sizeof(*tew), GFP_KERNEL);
- if (!tew)
+ work = kmalloc(sizeof(*work), GFP_KERNEL);
+ if (!work)
return;
- INIT_WORK(&tew->work, acpi_table_events_fn);
- tew->table = table;
- tew->event = event;
-
- schedule_work(&tew->work);
+ INIT_WORK(work, acpi_table_events_fn);
+ schedule_work(work);
}
int acpi_reconfig_notifier_register(struct notifier_block *nb)
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-10 23:19:58 +0000