struct acpi_gpe_event_info *acpi_ev_get_gpe_event_info(acpi_handle gpe_device,
u32 gpe_number);
+struct acpi_gpe_event_info *acpi_ev_low_get_gpe_info(u32 gpe_number,
+ struct acpi_gpe_block_info
+ *gpe_block);
+
/*
* evgpeblk
*/
u32 acpi_ev_gpe_detect(struct acpi_gpe_xrupt_info *gpe_xrupt_list);
-acpi_status
-acpi_ev_check_for_wake_only_gpe(struct acpi_gpe_event_info *gpe_event_info);
-
acpi_status acpi_ev_gpe_initialize(void);
/*
struct acpi_gpe_register_info *register_info; /* Backpointer to register info */
u8 flags; /* Misc info about this GPE */
u8 gpe_number; /* This GPE */
- u8 runtime_count;
- u8 wakeup_count;
+ u8 runtime_count; /* References to a run GPE */
+ u8 wakeup_count; /* References to a wake GPE */
};
/* Information about a GPE register pair, one per each status/enable pair in an array */
struct acpi_gpe_event_info *event_info; /* One for each GPE */
struct acpi_generic_address block_address; /* Base address of the block */
u32 register_count; /* Number of register pairs in block */
+ u16 gpe_count; /* Number of individual GPEs in block */
u8 block_base_number; /* Base GPE number for this block */
};
*
* RETURN: Status
*
- * DESCRIPTION: Updates GPE register enable masks based on the GPE type
+ * DESCRIPTION: Updates GPE register enable masks based upon whether there are
+ * references (either wake or run) to this GPE
*
******************************************************************************/
(1 <<
(gpe_event_info->gpe_number - gpe_register_info->base_gpe_number));
+ /* Clear the wake/run bits up front */
+
ACPI_CLEAR_BIT(gpe_register_info->enable_for_wake, register_bit);
ACPI_CLEAR_BIT(gpe_register_info->enable_for_run, register_bit);
- if (gpe_event_info->runtime_count)
+ /* Set the mask bits only if there are references to this GPE */
+
+ if (gpe_event_info->runtime_count) {
ACPI_SET_BIT(gpe_register_info->enable_for_run, register_bit);
+ }
- if (gpe_event_info->wakeup_count)
+ if (gpe_event_info->wakeup_count) {
ACPI_SET_BIT(gpe_register_info->enable_for_wake, register_bit);
+ }
return_ACPI_STATUS(AE_OK);
}
*
* RETURN: Status
*
- * DESCRIPTION: Enable a GPE based on the GPE type
+ * DESCRIPTION: Hardware-enable a GPE. Always enables the GPE, regardless
+ * of type or number of references.
+ *
+ * Note: The GPE lock should be already acquired when this function is called.
*
******************************************************************************/
{
acpi_status status;
+
ACPI_FUNCTION_TRACE(ev_enable_gpe);
- /* Make sure HW enable masks are updated */
+
+ /*
+ * We will only allow a GPE to be enabled if it has either an
+ * associated method (_Lxx/_Exx) or a handler. Otherwise, the
+ * GPE will be immediately disabled by acpi_ev_gpe_dispatch the
+ * first time it fires.
+ */
+ if (!(gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK)) {
+ return_ACPI_STATUS(AE_NO_HANDLER);
+ }
+
+ /* Ensure the HW enable masks are current */
status = acpi_ev_update_gpe_enable_masks(gpe_event_info);
- if (ACPI_FAILURE(status))
+ if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
+ }
+
+ /* Clear the GPE (of stale events) */
- /* Clear the GPE (of stale events), then enable it */
status = acpi_hw_clear_gpe(gpe_event_info);
- if (ACPI_FAILURE(status))
+ if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
+ }
/* Enable the requested GPE */
+
status = acpi_hw_write_gpe_enable_reg(gpe_event_info);
return_ACPI_STATUS(status);
}
*
* RETURN: Status
*
- * DESCRIPTION: Disable a GPE based on the GPE type
+ * DESCRIPTION: Hardware-disable a GPE. Always disables the requested GPE,
+ * regardless of the type or number of references.
+ *
+ * Note: The GPE lock should be already acquired when this function is called.
*
******************************************************************************/
ACPI_FUNCTION_TRACE(ev_disable_gpe);
- /* Make sure HW enable masks are updated */
+
+ /*
+ * Note: Always disable the GPE, even if we think that that it is already
+ * disabled. It is possible that the AML or some other code has enabled
+ * the GPE behind our back.
+ */
+
+ /* Ensure the HW enable masks are current */
status = acpi_ev_update_gpe_enable_masks(gpe_event_info);
- if (ACPI_FAILURE(status))
+ if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
+ }
/*
- * Even if we don't know the GPE type, make sure that we always
- * disable it. low_disable_gpe will just clear the enable bit for this
- * GPE and write it. It will not write out the current GPE enable mask,
- * since this may inadvertently enable GPEs too early, if a rogue GPE has
- * come in during ACPICA initialization - possibly as a result of AML or
- * other code that has enabled the GPE.
+ * Always H/W disable this GPE, even if we don't know the GPE type.
+ * Simply clear the enable bit for this particular GPE, but do not
+ * write out the current GPE enable mask since this may inadvertently
+ * enable GPEs too early. An example is a rogue GPE that has arrived
+ * during ACPICA initialization - possibly because AML or other code
+ * has enabled the GPE.
*/
status = acpi_hw_low_disable_gpe(gpe_event_info);
return_ACPI_STATUS(status);
}
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_ev_low_get_gpe_info
+ *
+ * PARAMETERS: gpe_number - Raw GPE number
+ * gpe_block - A GPE info block
+ *
+ * RETURN: A GPE event_info struct. NULL if not a valid GPE (The gpe_number
+ * is not within the specified GPE block)
+ *
+ * DESCRIPTION: Returns the event_info struct associated with this GPE. This is
+ * the low-level implementation of ev_get_gpe_event_info.
+ *
+ ******************************************************************************/
+
+struct acpi_gpe_event_info *acpi_ev_low_get_gpe_info(u32 gpe_number,
+ struct acpi_gpe_block_info
+ *gpe_block)
+{
+ u32 gpe_index;
+
+ /*
+ * Validate that the gpe_number is within the specified gpe_block.
+ * (Two steps)
+ */
+ if (!gpe_block || (gpe_number < gpe_block->block_base_number)) {
+ return (NULL);
+ }
+
+ gpe_index = gpe_number - gpe_block->block_base_number;
+ if (gpe_index >= gpe_block->gpe_count) {
+ return (NULL);
+ }
+
+ return (&gpe_block->event_info[gpe_index]);
+}
+
+
/*******************************************************************************
*
* FUNCTION: acpi_ev_get_gpe_event_info
u32 gpe_number)
{
union acpi_operand_object *obj_desc;
- struct acpi_gpe_block_info *gpe_block;
+ struct acpi_gpe_event_info *gpe_info;
u32 i;
ACPI_FUNCTION_ENTRY();
/* Examine GPE Block 0 and 1 (These blocks are permanent) */
for (i = 0; i < ACPI_MAX_GPE_BLOCKS; i++) {
- gpe_block = acpi_gbl_gpe_fadt_blocks[i];
- if (gpe_block) {
- if ((gpe_number >= gpe_block->block_base_number)
- && (gpe_number <
- gpe_block->block_base_number +
- (gpe_block->register_count * 8))) {
- return (&gpe_block->
- event_info[gpe_number -
- gpe_block->
- block_base_number]);
- }
+ gpe_info = acpi_ev_low_get_gpe_info(gpe_number,
+ acpi_gbl_gpe_fadt_blocks
+ [i]);
+ if (gpe_info) {
+ return (gpe_info);
}
}
return (NULL);
}
- gpe_block = obj_desc->device.gpe_block;
-
- if ((gpe_number >= gpe_block->block_base_number) &&
- (gpe_number <
- gpe_block->block_base_number + (gpe_block->register_count * 8))) {
- return (&gpe_block->
- event_info[gpe_number - gpe_block->block_base_number]);
- }
-
- return (NULL);
+ return (acpi_ev_low_get_gpe_info
+ (gpe_number, obj_desc->device.gpe_block));
}
/*******************************************************************************
return_VOID;
}
- /* Set the GPE flags for return to enabled state */
+ /* Update the GPE register masks for return to enabled state */
(void)acpi_ev_update_gpe_enable_masks(gpe_event_info);
default:
- /* No handler or method to run! */
-
+ /*
+ * No handler or method to run!
+ * 03/2010: This case should no longer be possible. We will not allow
+ * a GPE to be enabled if it has no handler or method.
+ */
ACPI_ERROR((AE_INFO,
"No handler or method for GPE[0x%2X], disabling event",
gpe_number));
/*
- * Disable the GPE. The GPE will remain disabled until the ACPICA
- * Core Subsystem is restarted, or a handler is installed.
+ * Disable the GPE. The GPE will remain disabled a handler
+ * is installed or ACPICA is restarted.
*/
status = acpi_ev_disable_gpe(gpe_event_info);
if (ACPI_FAILURE(status)) {
/* Local prototypes */
static acpi_status
-acpi_ev_save_method_info(acpi_handle obj_handle,
+acpi_ev_match_gpe_method(acpi_handle obj_handle,
u32 level, void *obj_desc, void **return_value);
static acpi_status
while (gpe_block) {
if ((&gpe_block->event_info[0] <= gpe_event_info) &&
- (&gpe_block->event_info[((acpi_size)
- gpe_block->
- register_count) * 8] >
+ (&gpe_block->event_info[gpe_block->gpe_count] >
gpe_event_info)) {
return (TRUE);
}
/*******************************************************************************
*
- * FUNCTION: acpi_ev_save_method_info
+ * FUNCTION: acpi_ev_match_gpe_method
*
* PARAMETERS: Callback from walk_namespace
*
* information for quick lookup during GPE dispatch
*
* The name of each GPE control method is of the form:
- * "_Lxx" or "_Exx"
- * Where:
+ * "_Lxx" or "_Exx", where:
* L - means that the GPE is level triggered
* E - means that the GPE is edge triggered
* xx - is the GPE number [in HEX]
******************************************************************************/
static acpi_status
-acpi_ev_save_method_info(acpi_handle obj_handle,
+acpi_ev_match_gpe_method(acpi_handle obj_handle,
u32 level, void *obj_desc, void **return_value)
{
+ struct acpi_namespace_node *method_node =
+ ACPI_CAST_PTR(struct acpi_namespace_node, obj_handle);
struct acpi_gpe_block_info *gpe_block = (void *)obj_desc;
struct acpi_gpe_event_info *gpe_event_info;
u32 gpe_number;
ACPI_FUNCTION_TRACE(ev_save_method_info);
/*
- * _Lxx and _Exx GPE method support
+ * Match and decode the _Lxx and _Exx GPE method names
*
- * 1) Extract the name from the object and convert to a string
+ * 1) Extract the method name and null terminate it
*/
- ACPI_MOVE_32_TO_32(name,
- &((struct acpi_namespace_node *)obj_handle)->name.
- integer);
+ ACPI_MOVE_32_TO_32(name, &method_node->name.integer);
name[ACPI_NAME_SIZE] = 0;
+ /* 2) Name must begin with an underscore */
+
+ if (name[0] != '_') {
+ return_ACPI_STATUS(AE_OK); /* Ignore this method */
+ }
+
/*
- * 2) Edge/Level determination is based on the 2nd character
+ * 3) Edge/Level determination is based on the 2nd character
* of the method name
*
- * NOTE: Default GPE type is RUNTIME. May be changed later to WAKE
- * if a _PRW object is found that points to this GPE.
+ * NOTE: Default GPE type is RUNTIME only. Later, if a _PRW object is
+ * found that points to this GPE, the ACPI_GPE_CAN_WAKE flag is set.
*/
switch (name[1]) {
case 'L':
break;
default:
- /* Unknown method type, just ignore it! */
+ /* Unknown method type, just ignore it */
ACPI_DEBUG_PRINT((ACPI_DB_LOAD,
"Ignoring unknown GPE method type: %s "
return_ACPI_STATUS(AE_OK);
}
- /* Convert the last two characters of the name to the GPE Number */
+ /* 4) The last two characters of the name are the hex GPE Number */
gpe_number = ACPI_STRTOUL(&name[2], NULL, 16);
if (gpe_number == ACPI_UINT32_MAX) {
/* Ensure that we have a valid GPE number for this GPE block */
- if ((gpe_number < gpe_block->block_base_number) ||
- (gpe_number >= (gpe_block->block_base_number +
- (gpe_block->register_count * 8)))) {
+ gpe_event_info = acpi_ev_low_get_gpe_info(gpe_number, gpe_block);
+ if (!gpe_event_info) {
/*
- * Not valid for this GPE block, just ignore it. However, it may be
- * valid for a different GPE block, since GPE0 and GPE1 methods both
- * appear under \_GPE.
+ * This gpe_number is not valid for this GPE block, just ignore it.
+ * However, it may be valid for a different GPE block, since GPE0
+ * and GPE1 methods both appear under \_GPE.
*/
return_ACPI_STATUS(AE_OK);
}
/*
- * Now we can add this information to the gpe_event_info block for use
- * during dispatch of this GPE.
+ * Add the GPE information from above to the gpe_event_info block for
+ * use during dispatch of this GPE.
*/
- gpe_event_info =
- &gpe_block->event_info[gpe_number - gpe_block->block_base_number];
-
- gpe_event_info->flags = (u8) (type | ACPI_GPE_DISPATCH_METHOD);
-
- gpe_event_info->dispatch.method_node =
- (struct acpi_namespace_node *)obj_handle;
+ gpe_event_info->flags = (u8)(type | ACPI_GPE_DISPATCH_METHOD);
+ gpe_event_info->dispatch.method_node = method_node;
ACPI_DEBUG_PRINT((ACPI_DB_LOAD,
"Registered GPE method %s as GPE number 0x%.2X\n",
*
* DESCRIPTION: Called from acpi_walk_namespace. Expects each object to be a
* Device. Run the _PRW method. If present, extract the GPE
- * number and mark the GPE as a WAKE GPE.
+ * number and mark the GPE as a CAN_WAKE GPE.
*
******************************************************************************/
ACPI_BTYPE_PACKAGE, &pkg_desc);
if (ACPI_FAILURE(status)) {
- /* Ignore all errors from _PRW, we don't want to abort the subsystem */
+ /* Ignore all errors from _PRW, we don't want to abort the walk */
return_ACPI_STATUS(AE_OK);
}
* 2) The GPE index(number) is within the range of the Gpe Block
* associated with the GPE device.
*/
- if ((gpe_device == target_gpe_device) &&
- (gpe_number >= gpe_block->block_base_number) &&
- (gpe_number < gpe_block->block_base_number +
- (gpe_block->register_count * 8))) {
- gpe_event_info = &gpe_block->event_info[gpe_number -
- gpe_block->
- block_base_number];
+ if (gpe_device != target_gpe_device) {
+ goto cleanup;
+ }
+
+ gpe_event_info = acpi_ev_low_get_gpe_info(gpe_number, gpe_block);
+ if (gpe_event_info) {
+ /* This GPE can wake the system */
gpe_event_info->flags |= ACPI_GPE_CAN_WAKE;
}
acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
}
- acpi_current_gpe_count -=
- gpe_block->register_count * ACPI_GPE_REGISTER_WIDTH;
+ acpi_current_gpe_count -= gpe_block->gpe_count;
/* Free the gpe_block */
* Allocate the GPE event_info block. There are eight distinct GPEs
* per register. Initialization to zeros is sufficient.
*/
- gpe_event_info = ACPI_ALLOCATE_ZEROED(((acpi_size) gpe_block->
- register_count *
- ACPI_GPE_REGISTER_WIDTH) *
+ gpe_event_info = ACPI_ALLOCATE_ZEROED((acpi_size) gpe_block->gpe_count *
sizeof(struct
acpi_gpe_event_info));
if (!gpe_event_info) {
/* Initialize the new GPE block */
gpe_block->node = gpe_device;
+ gpe_block->gpe_count = (u16)(register_count * ACPI_GPE_REGISTER_WIDTH);
gpe_block->register_count = register_count;
gpe_block->block_base_number = gpe_block_base_number;
status = acpi_ns_walk_namespace(ACPI_TYPE_METHOD, gpe_device,
ACPI_UINT32_MAX, ACPI_NS_WALK_NO_UNLOCK,
- acpi_ev_save_method_info, NULL,
+ acpi_ev_match_gpe_method, NULL,
gpe_block, NULL);
/* Return the new block */
"GPE %02X to %02X [%4.4s] %u regs on int 0x%X\n",
(u32) gpe_block->block_base_number,
(u32) (gpe_block->block_base_number +
- ((gpe_block->register_count *
- ACPI_GPE_REGISTER_WIDTH) - 1)),
+ (gpe_block->gpe_count - 1)),
gpe_device->name.ascii, gpe_block->register_count,
interrupt_number));
/* Update global count of currently available GPEs */
- acpi_current_gpe_count += register_count * ACPI_GPE_REGISTER_WIDTH;
+ acpi_current_gpe_count += gpe_block->gpe_count;
return_ACPI_STATUS(AE_OK);
}
acpi_ev_initialize_gpe_block(struct acpi_namespace_node *gpe_device,
struct acpi_gpe_block_info *gpe_block)
{
+ acpi_status status;
struct acpi_gpe_event_info *gpe_event_info;
struct acpi_gpe_walk_info gpe_info;
u32 wake_gpe_count;
u32 gpe_enabled_count;
+ u32 gpe_index;
+ u32 gpe_number;
u32 i;
u32 j;
gpe_info.gpe_block = gpe_block;
gpe_info.gpe_device = gpe_device;
- acpi_ns_walk_namespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT,
+ status = acpi_ns_walk_namespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT,
ACPI_UINT32_MAX, ACPI_NS_WALK_UNLOCK,
acpi_ev_match_prw_and_gpe, NULL,
&gpe_info, NULL);
+ if (ACPI_FAILURE(status)) {
+ ACPI_EXCEPTION((AE_INFO, status,
+ "While executing _PRW methods"));
+ }
}
/*
- * Enable all GPEs that have a corresponding method and aren't
+ * Enable all GPEs that have a corresponding method and are not
* capable of generating wakeups. Any other GPEs within this block
- * must be enabled via the acpi_enable_gpe() interface.
+ * must be enabled via the acpi_enable_gpe interface.
*/
wake_gpe_count = 0;
gpe_enabled_count = 0;
- if (gpe_device == acpi_gbl_fadt_gpe_device)
+
+ if (gpe_device == acpi_gbl_fadt_gpe_device) {
gpe_device = NULL;
+ }
for (i = 0; i < gpe_block->register_count; i++) {
for (j = 0; j < ACPI_GPE_REGISTER_WIDTH; j++) {
- acpi_status status;
- acpi_size gpe_index;
- int gpe_number;
/* Get the info block for this particular GPE */
- gpe_index = (acpi_size)i * ACPI_GPE_REGISTER_WIDTH + j;
+
+ gpe_index = (i * ACPI_GPE_REGISTER_WIDTH) + j;
gpe_event_info = &gpe_block->event_info[gpe_index];
if (gpe_event_info->flags & ACPI_GPE_CAN_WAKE) {
wake_gpe_count++;
- if (acpi_gbl_leave_wake_gpes_disabled)
+ if (acpi_gbl_leave_wake_gpes_disabled) {
continue;
+ }
}
- if (!(gpe_event_info->flags & ACPI_GPE_DISPATCH_METHOD))
+ /* Ignore GPEs that have no corresponding _Lxx/_Exx method */
+
+ if (!(gpe_event_info->flags & ACPI_GPE_DISPATCH_METHOD)) {
continue;
+ }
+
+ /* Enable this GPE */
gpe_number = gpe_index + gpe_block->block_base_number;
status = acpi_enable_gpe(gpe_device, gpe_number,
- ACPI_GPE_TYPE_RUNTIME);
- if (ACPI_FAILURE(status))
- ACPI_ERROR((AE_INFO,
- "Failed to enable GPE %02X\n",
+ ACPI_GPE_TYPE_RUNTIME);
+ if (ACPI_FAILURE(status)) {
+ ACPI_EXCEPTION((AE_INFO, status,
+ "Could not enable GPE 0x%02X",
gpe_number));
- else
- gpe_enabled_count++;
+ continue;
+ }
+
+ gpe_enabled_count++;
}
}
/* Parameter validation */
- if ((!address) || (type > ACPI_GPE_XRUPT_TYPE_MASK)) {
- status = AE_BAD_PARAMETER;
- goto exit;
+ if ((!address) || (type & ~ACPI_GPE_XRUPT_TYPE_MASK)) {
+ return_ACPI_STATUS(AE_BAD_PARAMETER);
}
status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS);
if (ACPI_FAILURE(status)) {
- goto exit;
+ return_ACPI_STATUS(status);
}
/* Ensure that we have a valid GPE number */
handler->context = context;
handler->method_node = gpe_event_info->dispatch.method_node;
+ /* Disable the GPE before installing the handler */
+
+ status = acpi_ev_disable_gpe(gpe_event_info);
+ if (ACPI_FAILURE (status)) {
+ goto unlock_and_exit;
+ }
+
/* Install the handler */
flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
- unlock_and_exit:
+unlock_and_exit:
(void)acpi_ut_release_mutex(ACPI_MTX_EVENTS);
- exit:
- if (ACPI_FAILURE(status))
- ACPI_EXCEPTION((AE_INFO, status,
- "Installing notify handler failed"));
return_ACPI_STATUS(status);
}
*
* FUNCTION: acpi_set_gpe
*
- * PARAMETERS: gpe_device - Parent GPE Device
+ * PARAMETERS: gpe_device - Parent GPE Device. NULL for GPE0/GPE1
* gpe_number - GPE level within the GPE block
- * action - Enable or disable
- * Called from ISR or not
+ * action - ACPI_GPE_ENABLE or ACPI_GPE_DISABLE
*
* RETURN: Status
*
- * DESCRIPTION: Enable or disable an ACPI event (general purpose)
+ * DESCRIPTION: Enable or disable an individual GPE. This function bypasses
+ * the reference count mechanism used in the acpi_enable_gpe and
+ * acpi_disable_gpe interfaces -- and should be used with care.
+ *
+ * Note: Typically used to disable a runtime GPE for short period of time,
+ * then re-enable it, without disturbing the existing reference counts. This
+ * is useful, for example, in the Embedded Controller (EC) driver.
*
******************************************************************************/
acpi_status acpi_set_gpe(acpi_handle gpe_device, u32 gpe_number, u8 action)
{
- acpi_status status = AE_OK;
- acpi_cpu_flags flags;
struct acpi_gpe_event_info *gpe_event_info;
+ acpi_status status;
+ acpi_cpu_flags flags;
ACPI_FUNCTION_TRACE(acpi_set_gpe);
break;
default:
- ACPI_ERROR((AE_INFO, "Invalid action\n"));
status = AE_BAD_PARAMETER;
break;
}
*
* FUNCTION: acpi_enable_gpe
*
- * PARAMETERS: gpe_device - Parent GPE Device
+ * PARAMETERS: gpe_device - Parent GPE Device. NULL for GPE0/GPE1
* gpe_number - GPE level within the GPE block
- * type - Purpose the GPE will be used for
+ * gpe_type - ACPI_GPE_TYPE_RUNTIME or ACPI_GPE_TYPE_WAKE
+ * or both
*
* RETURN: Status
*
- * DESCRIPTION: Take a reference to a GPE and enable it if necessary
+ * DESCRIPTION: Add a reference to a GPE. On the first reference, the GPE is
+ * hardware-enabled (for runtime GPEs), or the GPE register mask
+ * is updated (for wake GPEs).
*
******************************************************************************/
-acpi_status acpi_enable_gpe(acpi_handle gpe_device, u32 gpe_number, u8 type)
+acpi_status acpi_enable_gpe(acpi_handle gpe_device, u32 gpe_number, u8 gpe_type)
{
acpi_status status = AE_OK;
- acpi_cpu_flags flags;
struct acpi_gpe_event_info *gpe_event_info;
+ acpi_cpu_flags flags;
ACPI_FUNCTION_TRACE(acpi_enable_gpe);
- if (type & ~ACPI_GPE_TYPE_WAKE_RUN)
+ /* Parameter validation */
+
+ if (!gpe_type || (gpe_type & ~ACPI_GPE_TYPE_WAKE_RUN)) {
return_ACPI_STATUS(AE_BAD_PARAMETER);
+ }
flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
goto unlock_and_exit;
}
- if (type & ACPI_GPE_TYPE_RUNTIME) {
- if (++gpe_event_info->runtime_count == 1) {
+ if (gpe_type & ACPI_GPE_TYPE_RUNTIME) {
+ if (gpe_event_info->runtime_count == ACPI_UINT8_MAX) {
+ status = AE_LIMIT; /* Too many references */
+ goto unlock_and_exit;
+ }
+
+ gpe_event_info->runtime_count++;
+ if (gpe_event_info->runtime_count == 1) {
status = acpi_ev_enable_gpe(gpe_event_info);
- if (ACPI_FAILURE(status))
+ if (ACPI_FAILURE(status)) {
gpe_event_info->runtime_count--;
+ goto unlock_and_exit;
+ }
}
}
- if (type & ACPI_GPE_TYPE_WAKE) {
+ if (gpe_type & ACPI_GPE_TYPE_WAKE) {
+ /* The GPE must have the ability to wake the system */
+
if (!(gpe_event_info->flags & ACPI_GPE_CAN_WAKE)) {
- status = AE_BAD_PARAMETER;
+ status = AE_TYPE;
+ goto unlock_and_exit;
+ }
+
+ if (gpe_event_info->wakeup_count == ACPI_UINT8_MAX) {
+ status = AE_LIMIT; /* Too many references */
goto unlock_and_exit;
}
/*
- * Wake-up GPEs are only enabled right prior to putting the
- * system into a sleep state.
+ * Update the enable mask on the first wakeup reference. Wake GPEs
+ * are only hardware-enabled just before sleeping.
*/
- if (++gpe_event_info->wakeup_count == 1)
- acpi_ev_update_gpe_enable_masks(gpe_event_info);
+ gpe_event_info->wakeup_count++;
+ if (gpe_event_info->wakeup_count == 1) {
+ (void)acpi_ev_update_gpe_enable_masks(gpe_event_info);
+ }
}
unlock_and_exit:
*
* FUNCTION: acpi_disable_gpe
*
- * PARAMETERS: gpe_device - Parent GPE Device
+ * PARAMETERS: gpe_device - Parent GPE Device. NULL for GPE0/GPE1
* gpe_number - GPE level within the GPE block
- * type - Purpose the GPE won't be used for any more
+ * gpe_type - ACPI_GPE_TYPE_RUNTIME or ACPI_GPE_TYPE_WAKE
+ * or both
*
* RETURN: Status
*
- * DESCRIPTION: Release a reference to a GPE and disable it if necessary
+ * DESCRIPTION: Remove a reference to a GPE. When the last reference is
+ * removed, only then is the GPE disabled (for runtime GPEs), or
+ * the GPE mask bit disabled (for wake GPEs)
*
******************************************************************************/
-acpi_status acpi_disable_gpe(acpi_handle gpe_device, u32 gpe_number, u8 type)
+acpi_status acpi_disable_gpe(acpi_handle gpe_device, u32 gpe_number, u8 gpe_type)
{
acpi_status status = AE_OK;
- acpi_cpu_flags flags;
struct acpi_gpe_event_info *gpe_event_info;
+ acpi_cpu_flags flags;
ACPI_FUNCTION_TRACE(acpi_disable_gpe);
- if (type & ~ACPI_GPE_TYPE_WAKE_RUN)
+ /* Parameter validation */
+
+ if (!gpe_type || (gpe_type & ~ACPI_GPE_TYPE_WAKE_RUN)) {
return_ACPI_STATUS(AE_BAD_PARAMETER);
+ }
flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
+
/* Ensure that we have a valid GPE number */
gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number);
goto unlock_and_exit;
}
- if ((type & ACPI_GPE_TYPE_RUNTIME) && gpe_event_info->runtime_count) {
- if (--gpe_event_info->runtime_count == 0)
+ /* Hardware-disable a runtime GPE on removal of the last reference */
+
+ if (gpe_type & ACPI_GPE_TYPE_RUNTIME) {
+ if (!gpe_event_info->runtime_count) {
+ status = AE_LIMIT; /* There are no references to remove */
+ goto unlock_and_exit;
+ }
+
+ gpe_event_info->runtime_count--;
+ if (!gpe_event_info->runtime_count) {
status = acpi_ev_disable_gpe(gpe_event_info);
+ if (ACPI_FAILURE(status)) {
+ gpe_event_info->runtime_count++;
+ goto unlock_and_exit;
+ }
+ }
}
- if ((type & ACPI_GPE_TYPE_WAKE) && gpe_event_info->wakeup_count) {
- /*
- * Wake-up GPEs are not enabled after leaving system sleep
- * states, so we don't need to disable them here.
- */
- if (--gpe_event_info->wakeup_count == 0)
- acpi_ev_update_gpe_enable_masks(gpe_event_info);
+ /*
+ * Update masks for wake GPE on removal of the last reference.
+ * No need to hardware-disable wake GPEs here, they are not currently
+ * enabled.
+ */
+ if (gpe_type & ACPI_GPE_TYPE_WAKE) {
+ if (!gpe_event_info->wakeup_count) {
+ status = AE_LIMIT; /* There are no references to remove */
+ goto unlock_and_exit;
+ }
+
+ gpe_event_info->wakeup_count--;
+ if (!gpe_event_info->wakeup_count) {
+ (void)acpi_ev_update_gpe_enable_masks(gpe_event_info);
+ }
}
unlock_and_exit:
*
* FUNCTION: acpi_clear_gpe
*
- * PARAMETERS: gpe_device - Parent GPE Device
+ * PARAMETERS: gpe_device - Parent GPE Device. NULL for GPE0/GPE1
* gpe_number - GPE level within the GPE block
- * Flags - Called from an ISR or not
*
* RETURN: Status
*
* DESCRIPTION: Clear an ACPI event (general purpose)
*
******************************************************************************/
-acpi_status acpi_clear_gpe(acpi_handle gpe_device, u32 gpe_number, u32 flags)
+acpi_status acpi_clear_gpe(acpi_handle gpe_device, u32 gpe_number)
{
acpi_status status = AE_OK;
struct acpi_gpe_event_info *gpe_event_info;
+ acpi_cpu_flags flags;
ACPI_FUNCTION_TRACE(acpi_clear_gpe);
- /* Use semaphore lock if not executing at interrupt level */
-
- if (flags & ACPI_NOT_ISR) {
- status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS);
- if (ACPI_FAILURE(status)) {
- return_ACPI_STATUS(status);
- }
- }
+ flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
/* Ensure that we have a valid GPE number */
status = acpi_hw_clear_gpe(gpe_event_info);
unlock_and_exit:
- if (flags & ACPI_NOT_ISR) {
- (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS);
- }
+ acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
return_ACPI_STATUS(status);
}
*
* FUNCTION: acpi_get_gpe_status
*
- * PARAMETERS: gpe_device - Parent GPE Device
+ * PARAMETERS: gpe_device - Parent GPE Device. NULL for GPE0/GPE1
* gpe_number - GPE level within the GPE block
- * Flags - Called from an ISR or not
* event_status - Where the current status of the event will
* be returned
*
******************************************************************************/
acpi_status
acpi_get_gpe_status(acpi_handle gpe_device,
- u32 gpe_number, u32 flags, acpi_event_status * event_status)
+ u32 gpe_number, acpi_event_status *event_status)
{
acpi_status status = AE_OK;
struct acpi_gpe_event_info *gpe_event_info;
+ acpi_cpu_flags flags;
ACPI_FUNCTION_TRACE(acpi_get_gpe_status);
- /* Use semaphore lock if not executing at interrupt level */
-
- if (flags & ACPI_NOT_ISR) {
- status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS);
- if (ACPI_FAILURE(status)) {
- return_ACPI_STATUS(status);
- }
- }
+ flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
/* Ensure that we have a valid GPE number */
*event_status |= ACPI_EVENT_FLAG_HANDLE;
unlock_and_exit:
- if (flags & ACPI_NOT_ISR) {
- (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS);
- }
+ acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
return_ACPI_STATUS(status);
}
goto unlock_and_exit;
}
- /* Run the _PRW methods and enable the GPEs */
-
- status = acpi_ev_initialize_gpe_block(node, gpe_block);
- if (ACPI_FAILURE(status)) {
- goto unlock_and_exit;
- }
-
- /* Get the device_object attached to the node */
+ /* Install block in the device_object attached to the node */
obj_desc = acpi_ns_get_attached_object(node);
if (!obj_desc) {
- /* No object, create a new one */
-
+ /*
+ * No object, create a new one (Device nodes do not always have
+ * an attached object)
+ */
obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_DEVICE);
if (!obj_desc) {
status = AE_NO_MEMORY;
}
}
- /* Install the GPE block in the device_object */
+ /* Now install the GPE block in the device_object */
obj_desc->device.gpe_block = gpe_block;
+ /* Run the _PRW methods and enable the runtime GPEs in the new block */
+
+ status = acpi_ev_initialize_gpe_block(node, gpe_block);
+
unlock_and_exit:
(void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
return_ACPI_STATUS(status);
/* Increment Index by the number of GPEs in this block */
- info->next_block_base_index +=
- (gpe_block->register_count * ACPI_GPE_REGISTER_WIDTH);
+ info->next_block_base_index += gpe_block->gpe_count;
if (info->index < info->next_block_base_index) {
/*
status = AE_AML_OPERAND_TYPE;
break;
}
-#ifdef ACPI_GPE_NOTIFY_CHECK
- /*
- * GPE method wake/notify check. Here, we want to ensure that we
- * don't receive any "DeviceWake" Notifies from a GPE _Lxx or _Exx
- * GPE method during system runtime. If we do, the GPE is marked
- * as "wake-only" and disabled.
- *
- * 1) Is the Notify() value == device_wake?
- * 2) Is this a GPE deferred method? (An _Lxx or _Exx method)
- * 3) Did the original GPE happen at system runtime?
- * (versus during wake)
- *
- * If all three cases are true, this is a wake-only GPE that should
- * be disabled at runtime.
- */
- if (value == 2) { /* device_wake */
- status =
- acpi_ev_check_for_wake_only_gpe(walk_state->
- gpe_event_info);
- if (ACPI_FAILURE(status)) {
-
- /* AE_WAKE_ONLY_GPE only error, means ignore this notify */
-
- return_ACPI_STATUS(AE_OK)
- }
- }
-#endif
/*
* Dispatch the notify to the appropriate handler
}
status = acpi_get_gpe_status(NULL, device->wakeup.gpe_number,
- ACPI_NOT_ISR, &event_status);
+ &event_status);
if (status == AE_OK)
device->wakeup.flags.run_wake =
!!(event_status & ACPI_EVENT_FLAG_HANDLE);
"Invalid GPE 0x%x\n", index));
goto end;
}
- result = acpi_get_gpe_status(*handle, index,
- ACPI_NOT_ISR, status);
+ result = acpi_get_gpe_status(*handle, index, status);
} else if (index < (num_gpes + ACPI_NUM_FIXED_EVENTS))
result = acpi_get_event_status(index - num_gpes, status);
result = acpi_set_gpe(handle, index, ACPI_GPE_ENABLE);
else if (!strcmp(buf, "clear\n") &&
(status & ACPI_EVENT_FLAG_SET))
- result = acpi_clear_gpe(handle, index, ACPI_NOT_ISR);
+ result = acpi_clear_gpe(handle, index);
else
all_counters[index].count = strtoul(buf, NULL, 0);
} else if (index < num_gpes + ACPI_NUM_FIXED_EVENTS) {
#define AE_NO_GLOBAL_LOCK (acpi_status) (0x0017 | AE_CODE_ENVIRONMENTAL)
#define AE_ABORT_METHOD (acpi_status) (0x0018 | AE_CODE_ENVIRONMENTAL)
#define AE_SAME_HANDLER (acpi_status) (0x0019 | AE_CODE_ENVIRONMENTAL)
-#define AE_WAKE_ONLY_GPE (acpi_status) (0x001A | AE_CODE_ENVIRONMENTAL)
+#define AE_NO_HANDLER (acpi_status) (0x001A | AE_CODE_ENVIRONMENTAL)
#define AE_OWNER_ID_LIMIT (acpi_status) (0x001B | AE_CODE_ENVIRONMENTAL)
#define AE_CODE_ENV_MAX 0x001B
*/
acpi_status acpi_set_gpe(acpi_handle gpe_device, u32 gpe_number, u8 action);
-acpi_status acpi_enable_gpe(acpi_handle gpe_device, u32 gpe_number, u8 type);
+acpi_status
+acpi_enable_gpe(acpi_handle gpe_device, u32 gpe_number, u8 gpe_type);
-acpi_status acpi_disable_gpe(acpi_handle gpe_device, u32 gpe_number, u8 type);
+acpi_status
+acpi_disable_gpe(acpi_handle gpe_device, u32 gpe_number, u8 gpe_type);
-acpi_status acpi_clear_gpe(acpi_handle gpe_device, u32 gpe_number, u32 flags);
+acpi_status acpi_clear_gpe(acpi_handle gpe_device, u32 gpe_number);
acpi_status
acpi_get_gpe_status(acpi_handle gpe_device,
- u32 gpe_number,
- u32 flags, acpi_event_status * event_status);
+ u32 gpe_number, acpi_event_status *event_status);
acpi_status acpi_disable_all_gpes(void);
#define ACPI_GPE_MAX 0xFF
#define ACPI_NUM_GPE 256
+/* Actions for acpi_set_gpe */
+
#define ACPI_GPE_ENABLE 0
#define ACPI_GPE_DISABLE 1
+/* gpe_types for acpi_enable_gpe and acpi_disable_gpe */
+
+#define ACPI_GPE_TYPE_WAKE (u8) 0x01
+#define ACPI_GPE_TYPE_RUNTIME (u8) 0x02
+#define ACPI_GPE_TYPE_WAKE_RUN (u8) 0x03
+
/*
* GPE info flags - Per GPE
- * +-+-+-+---+-+-+-+
- * |7|6|5|4:3|2|1|0|
- * +-+-+-+---+-+-+-+
- * | | | | | | |
- * | | | | | | +--- Interrupt type: Edge or Level Triggered
- * | | | | | +--- GPE can wake the system
- * | | | | +--- Unused
- * | | | +--- Type of dispatch -- to method, handler, or none
- * | | +--- Unused
- * | +--- Unused
- * +--- Unused
+ * +-------+---+-+-+
+ * | 7:4 |3:2|1|0|
+ * +-------+---+-+-+
+ * | | | |
+ * | | | +--- Interrupt type: edge or level triggered
+ * | | +----- GPE can wake the system
+ * | +-------- Type of dispatch:to method, handler, or none
+ * +-------------- <Reserved>
*/
#define ACPI_GPE_XRUPT_TYPE_MASK (u8) 0x01
#define ACPI_GPE_LEVEL_TRIGGERED (u8) 0x01
#define ACPI_GPE_EDGE_TRIGGERED (u8) 0x00
-#define ACPI_GPE_TYPE_MASK (u8) 0x06
-#define ACPI_GPE_TYPE_WAKE_RUN (u8) 0x06
-#define ACPI_GPE_TYPE_WAKE (u8) 0x02
-#define ACPI_GPE_TYPE_RUNTIME (u8) 0x04 /* Default */
#define ACPI_GPE_CAN_WAKE (u8) 0x02
-#define ACPI_GPE_DISPATCH_MASK (u8) 0x18
-#define ACPI_GPE_DISPATCH_HANDLER (u8) 0x08
-#define ACPI_GPE_DISPATCH_METHOD (u8) 0x10
-#define ACPI_GPE_DISPATCH_NOT_USED (u8) 0x00 /* Default */
+#define ACPI_GPE_DISPATCH_MASK (u8) 0x0C
+#define ACPI_GPE_DISPATCH_HANDLER (u8) 0x04
+#define ACPI_GPE_DISPATCH_METHOD (u8) 0x08
+#define ACPI_GPE_DISPATCH_NOT_USED (u8) 0x00
/*
* Flags for GPE and Lock interfaces
*/
-#define ACPI_EVENT_WAKE_ENABLE 0x2 /* acpi_gpe_enable */
-#define ACPI_EVENT_WAKE_DISABLE 0x2 /* acpi_gpe_disable */
-
#define ACPI_NOT_ISR 0x1
#define ACPI_ISR 0x0
git://ftp.safe.ca / safe / jmp / linux-2.6 / commitdiff