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path: root/drivers/acpi/resources
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-rw-r--r--drivers/acpi/resources/rscalc.c14
-rw-r--r--drivers/acpi/resources/rsdump.c24
-rw-r--r--drivers/acpi/resources/rslist.c4
-rw-r--r--drivers/acpi/resources/rsmisc.c92
-rw-r--r--drivers/acpi/resources/rsutils.c22
-rw-r--r--drivers/acpi/resources/rsxface.c208
6 files changed, 237 insertions, 127 deletions
diff --git a/drivers/acpi/resources/rscalc.c b/drivers/acpi/resources/rscalc.c
index eca7439ee9da..c2c4d9079c6c 100644
--- a/drivers/acpi/resources/rscalc.c
+++ b/drivers/acpi/resources/rscalc.c
@@ -300,7 +300,7 @@ acpi_rs_get_aml_length(struct acpi_resource * resource, acpi_size * size_needed)
/* Point to the next object */
resource =
- ACPI_PTR_ADD(struct acpi_resource, resource,
+ ACPI_ADD_PTR(struct acpi_resource, resource,
resource->length);
}
@@ -374,8 +374,7 @@ acpi_rs_get_list_length(u8 * aml_buffer,
* Get the number of bits set in the 16-bit IRQ mask
*/
ACPI_MOVE_16_TO_16(&temp16, buffer);
- extra_struct_bytes =
- acpi_rs_count_set_bits(temp16) * sizeof(u32);
+ extra_struct_bytes = acpi_rs_count_set_bits(temp16);
break;
case ACPI_RESOURCE_NAME_DMA:
@@ -383,8 +382,7 @@ acpi_rs_get_list_length(u8 * aml_buffer,
* DMA Resource:
* Get the number of bits set in the 8-bit DMA mask
*/
- extra_struct_bytes =
- acpi_rs_count_set_bits(*buffer) * sizeof(u32);
+ extra_struct_bytes = acpi_rs_count_set_bits(*buffer);
break;
case ACPI_RESOURCE_NAME_VENDOR_SMALL:
@@ -399,9 +397,9 @@ acpi_rs_get_list_length(u8 * aml_buffer,
case ACPI_RESOURCE_NAME_END_TAG:
/*
- * End Tag: This is the normal exit
+ * End Tag: This is the normal exit, add size of end_tag
*/
- *size_needed = buffer_size;
+ *size_needed = buffer_size + ACPI_RS_SIZE_MIN;
return_ACPI_STATUS(AE_OK);
case ACPI_RESOURCE_NAME_VENDOR_LARGE:
@@ -466,7 +464,7 @@ acpi_rs_get_list_length(u8 * aml_buffer,
temp16 = (u16) (acpi_gbl_resource_struct_sizes[resource_index] +
extra_struct_bytes);
- buffer_size += (u32) ACPI_ALIGN_RESOURCE_SIZE(temp16);
+ buffer_size += (u32) ACPI_ROUND_UP_TO_NATIVE_WORD(temp16);
/*
* Point to the next resource within the stream
diff --git a/drivers/acpi/resources/rsdump.c b/drivers/acpi/resources/rsdump.c
index f617ca80c5a6..cebd890d3db5 100644
--- a/drivers/acpi/resources/rsdump.c
+++ b/drivers/acpi/resources/rsdump.c
@@ -383,7 +383,7 @@ acpi_rs_dump_descriptor(void *resource, struct acpi_rsdump_info *table)
while (count) {
previous_target = target;
- target = ((u8 *) resource) + table->offset;
+ target = ACPI_ADD_PTR(u8, resource, table->offset);
name = table->name;
switch (table->opcode) {
@@ -410,22 +410,19 @@ acpi_rs_dump_descriptor(void *resource, struct acpi_rsdump_info *table)
/* Data items, 8/16/32/64 bit */
case ACPI_RSD_UINT8:
- acpi_rs_out_integer8(name, *ACPI_CAST_PTR(u8, target));
+ acpi_rs_out_integer8(name, ACPI_GET8(target));
break;
case ACPI_RSD_UINT16:
- acpi_rs_out_integer16(name,
- *ACPI_CAST_PTR(u16, target));
+ acpi_rs_out_integer16(name, ACPI_GET16(target));
break;
case ACPI_RSD_UINT32:
- acpi_rs_out_integer32(name,
- *ACPI_CAST_PTR(u32, target));
+ acpi_rs_out_integer32(name, ACPI_GET32(target));
break;
case ACPI_RSD_UINT64:
- acpi_rs_out_integer64(name,
- *ACPI_CAST_PTR(u64, target));
+ acpi_rs_out_integer64(name, ACPI_GET64(target));
break;
/* Flags: 1-bit and 2-bit flags supported */
@@ -462,8 +459,8 @@ acpi_rs_dump_descriptor(void *resource, struct acpi_rsdump_info *table)
* Note: The list length is obtained from the previous table entry
*/
if (previous_target) {
- acpi_rs_dump_byte_list(*ACPI_CAST_PTR
- (u16, previous_target),
+ acpi_rs_dump_byte_list(ACPI_GET16
+ (previous_target),
target);
}
break;
@@ -634,7 +631,7 @@ void acpi_rs_dump_resource_list(struct acpi_resource *resource_list)
/* Point to the next resource structure */
resource_list =
- ACPI_PTR_ADD(struct acpi_resource, resource_list,
+ ACPI_ADD_PTR(struct acpi_resource, resource_list,
resource_list->length);
/* Exit when END_TAG descriptor is reached */
@@ -675,9 +672,8 @@ void acpi_rs_dump_irq_list(u8 * route_table)
count);
acpi_rs_dump_descriptor(prt_element, acpi_rs_dump_prt);
- prt_element = ACPI_CAST_PTR(struct acpi_pci_routing_table,
- ((u8 *) prt_element) +
- prt_element->length);
+ prt_element = ACPI_ADD_PTR(struct acpi_pci_routing_table,
+ prt_element, prt_element->length);
}
}
diff --git a/drivers/acpi/resources/rslist.c b/drivers/acpi/resources/rslist.c
index b83996233c1d..573c06705641 100644
--- a/drivers/acpi/resources/rslist.c
+++ b/drivers/acpi/resources/rslist.c
@@ -112,7 +112,7 @@ acpi_rs_convert_aml_to_resources(u8 * aml, u32 aml_length, u8 * output_buffer)
/* Point to the next structure in the output buffer */
resource =
- ACPI_PTR_ADD(struct acpi_resource, resource,
+ ACPI_ADD_PTR(struct acpi_resource, resource,
resource->length);
}
@@ -201,7 +201,7 @@ acpi_rs_convert_resources_to_aml(struct acpi_resource *resource,
/* Point to the next input resource descriptor */
resource =
- ACPI_PTR_ADD(struct acpi_resource, resource,
+ ACPI_ADD_PTR(struct acpi_resource, resource,
resource->length);
}
diff --git a/drivers/acpi/resources/rsmisc.c b/drivers/acpi/resources/rsmisc.c
index 16ad3bfbee2a..e1b5aa2af9a5 100644
--- a/drivers/acpi/resources/rsmisc.c
+++ b/drivers/acpi/resources/rsmisc.c
@@ -104,8 +104,9 @@ acpi_rs_convert_aml_to_resource(struct acpi_resource *resource,
* Source is the external AML byte stream buffer,
* destination is the internal resource descriptor
*/
- source = ((u8 *) aml) + info->aml_offset;
- destination = ((u8 *) resource) + info->resource_offset;
+ source = ACPI_ADD_PTR(void, aml, info->aml_offset);
+ destination =
+ ACPI_ADD_PTR(void, resource, info->resource_offset);
switch (info->opcode) {
case ACPI_RSC_INITGET:
@@ -129,22 +130,22 @@ acpi_rs_convert_aml_to_resource(struct acpi_resource *resource,
/*
* Mask and shift the flag bit
*/
- *((u8 *) destination) = (u8)
- ((*((u8 *) source) >> info->value) & 0x01);
+ ACPI_SET8(destination) = (u8)
+ ((ACPI_GET8(source) >> info->value) & 0x01);
break;
case ACPI_RSC_2BITFLAG:
/*
* Mask and shift the flag bits
*/
- *((u8 *) destination) = (u8)
- ((*((u8 *) source) >> info->value) & 0x03);
+ ACPI_SET8(destination) = (u8)
+ ((ACPI_GET8(source) >> info->value) & 0x03);
break;
case ACPI_RSC_COUNT:
- item_count = *((u8 *) source);
- *((u8 *) destination) = (u8) item_count;
+ item_count = ACPI_GET8(source);
+ ACPI_SET8(destination) = (u8) item_count;
resource->length = resource->length +
(info->value * (item_count - 1));
@@ -153,7 +154,7 @@ acpi_rs_convert_aml_to_resource(struct acpi_resource *resource,
case ACPI_RSC_COUNT16:
item_count = aml_resource_length;
- *((u16 *) destination) = item_count;
+ ACPI_SET16(destination) = item_count;
resource->length = resource->length +
(info->value * (item_count - 1));
@@ -186,9 +187,8 @@ acpi_rs_convert_aml_to_resource(struct acpi_resource *resource,
case ACPI_RSC_DATA8:
- target = ((char *)resource) + info->value;
- ACPI_MEMCPY(destination, source,
- *(ACPI_CAST_PTR(u16, target)));
+ target = ACPI_ADD_PTR(char, resource, info->value);
+ ACPI_MEMCPY(destination, source, ACPI_GET16(target));
break;
case ACPI_RSC_ADDRESS:
@@ -217,8 +217,8 @@ acpi_rs_convert_aml_to_resource(struct acpi_resource *resource,
* complicated case used by the Interrupt() macro
*/
target =
- ((char *)resource) + info->aml_offset +
- (item_count * 4);
+ ACPI_ADD_PTR(char, resource,
+ info->aml_offset + (item_count * 4));
resource->length +=
acpi_rs_get_resource_source(aml_resource_length,
@@ -230,15 +230,14 @@ acpi_rs_convert_aml_to_resource(struct acpi_resource *resource,
* 8-bit encoded bitmask (DMA macro)
*/
item_count =
- acpi_rs_decode_bitmask(*((u8 *) source),
+ acpi_rs_decode_bitmask(ACPI_GET8(source),
destination);
if (item_count) {
- resource->length +=
- resource->length + (item_count - 1);
+ resource->length += (item_count - 1);
}
- target = ((char *)resource) + info->value;
- *((u8 *) target) = (u8) item_count;
+ target = ACPI_ADD_PTR(char, resource, info->value);
+ ACPI_SET8(target) = (u8) item_count;
break;
case ACPI_RSC_BITMASK16:
@@ -250,12 +249,11 @@ acpi_rs_convert_aml_to_resource(struct acpi_resource *resource,
item_count =
acpi_rs_decode_bitmask(temp16, destination);
if (item_count) {
- resource->length =
- resource->length + (item_count - 1);
+ resource->length += (item_count - 1);
}
- target = ((char *)resource) + info->value;
- *((u8 *) target) = (u8) item_count;
+ target = ACPI_ADD_PTR(char, resource, info->value);
+ ACPI_SET8(target) = (u8) item_count;
break;
case ACPI_RSC_EXIT_NE:
@@ -270,7 +268,7 @@ acpi_rs_convert_aml_to_resource(struct acpi_resource *resource,
break;
case ACPI_RSC_COMPARE_VALUE:
- if (*((u8 *) source) != info->value) {
+ if (ACPI_GET8(source) != info->value) {
goto exit;
}
break;
@@ -349,8 +347,8 @@ acpi_rs_convert_resource_to_aml(struct acpi_resource *resource,
* Source is the internal resource descriptor,
* destination is the external AML byte stream buffer
*/
- source = ((u8 *) resource) + info->resource_offset;
- destination = ((u8 *) aml) + info->aml_offset;
+ source = ACPI_ADD_PTR(void, resource, info->resource_offset);
+ destination = ACPI_ADD_PTR(void, aml, info->aml_offset);
switch (info->opcode) {
case ACPI_RSC_INITSET:
@@ -368,37 +366,38 @@ acpi_rs_convert_resource_to_aml(struct acpi_resource *resource,
/*
* Clear the flag byte
*/
- *((u8 *) destination) = 0;
+ ACPI_SET8(destination) = 0;
break;
case ACPI_RSC_1BITFLAG:
/*
* Mask and shift the flag bit
*/
- *((u8 *) destination) |= (u8)
- ((*((u8 *) source) & 0x01) << info->value);
+ ACPI_SET8(destination) |= (u8)
+ ((ACPI_GET8(source) & 0x01) << info->value);
break;
case ACPI_RSC_2BITFLAG:
/*
* Mask and shift the flag bits
*/
- *((u8 *) destination) |= (u8)
- ((*((u8 *) source) & 0x03) << info->value);
+ ACPI_SET8(destination) |= (u8)
+ ((ACPI_GET8(source) & 0x03) << info->value);
break;
case ACPI_RSC_COUNT:
- item_count = *((u8 *) source);
- *((u8 *) destination) = (u8) item_count;
+ item_count = ACPI_GET8(source);
+ ACPI_SET8(destination) = (u8) item_count;
- aml_length = (u16) (aml_length +
- (info->value * (item_count - 1)));
+ aml_length =
+ (u16) (aml_length +
+ (info->value * (item_count - 1)));
break;
case ACPI_RSC_COUNT16:
- item_count = *((u16 *) source);
+ item_count = ACPI_GET16(source);
aml_length = (u16) (aml_length + item_count);
acpi_rs_set_resource_length(aml_length, aml);
break;
@@ -453,20 +452,21 @@ acpi_rs_convert_resource_to_aml(struct acpi_resource *resource,
/*
* 8-bit encoded bitmask (DMA macro)
*/
- *((u8 *) destination) = (u8)
+ ACPI_SET8(destination) = (u8)
acpi_rs_encode_bitmask(source,
- *(((u8 *) resource) +
- info->value));
+ *ACPI_ADD_PTR(u8, resource,
+ info->value));
break;
case ACPI_RSC_BITMASK16:
/*
* 16-bit encoded bitmask (IRQ macro)
*/
- temp16 =
- acpi_rs_encode_bitmask(source,
- *(((u8 *) resource) +
- info->value));
+ temp16 = acpi_rs_encode_bitmask(source,
+ *ACPI_ADD_PTR(u8,
+ resource,
+ info->
+ value));
ACPI_MOVE_16_TO_16(destination, &temp16);
break;
@@ -485,9 +485,9 @@ acpi_rs_convert_resource_to_aml(struct acpi_resource *resource,
*/
switch (COMPARE_OPCODE(info)) {
case ACPI_RSC_COMPARE_VALUE:
- if (*
- ((u8 *) (((u8 *) resource) +
- COMPARE_TARGET(info))) !=
+
+ if (*ACPI_ADD_PTR(u8, resource,
+ COMPARE_TARGET(info)) !=
COMPARE_VALUE(info)) {
goto exit;
}
diff --git a/drivers/acpi/resources/rsutils.c b/drivers/acpi/resources/rsutils.c
index a1eac0f1df54..2236a0c90daa 100644
--- a/drivers/acpi/resources/rsutils.c
+++ b/drivers/acpi/resources/rsutils.c
@@ -152,18 +152,18 @@ acpi_rs_move_data(void *destination, void *source, u16 item_count, u8 move_type)
* misaligned memory transfers
*/
case ACPI_RSC_MOVE16:
- ACPI_MOVE_16_TO_16(&((u16 *) destination)[i],
- &((u16 *) source)[i]);
+ ACPI_MOVE_16_TO_16(&ACPI_CAST_PTR(u16, destination)[i],
+ &ACPI_CAST_PTR(u16, source)[i]);
break;
case ACPI_RSC_MOVE32:
- ACPI_MOVE_32_TO_32(&((u32 *) destination)[i],
- &((u32 *) source)[i]);
+ ACPI_MOVE_32_TO_32(&ACPI_CAST_PTR(u32, destination)[i],
+ &ACPI_CAST_PTR(u32, source)[i]);
break;
case ACPI_RSC_MOVE64:
- ACPI_MOVE_64_TO_64(&((u64 *) destination)[i],
- &((u64 *) source)[i]);
+ ACPI_MOVE_64_TO_64(&ACPI_CAST_PTR(u64, destination)[i],
+ &ACPI_CAST_PTR(u64, source)[i]);
break;
default:
@@ -318,7 +318,7 @@ acpi_rs_get_resource_source(acpi_rs_length resource_length,
total_length =
resource_length + sizeof(struct aml_resource_large_header);
- aml_resource_source = ((u8 *) aml) + minimum_length;
+ aml_resource_source = ACPI_ADD_PTR(u8, aml, minimum_length);
/*
* resource_source is present if the length of the descriptor is longer than
@@ -338,9 +338,9 @@ acpi_rs_get_resource_source(acpi_rs_length resource_length,
* String destination pointer is not specified; Set the String
* pointer to the end of the current resource_source structure.
*/
- resource_source->string_ptr = (char *)
- ((u8 *) resource_source) +
- sizeof(struct acpi_resource_source);
+ resource_source->string_ptr =
+ ACPI_ADD_PTR(char, resource_source,
+ sizeof(struct acpi_resource_source));
}
/*
@@ -407,7 +407,7 @@ acpi_rs_set_resource_source(union aml_resource * aml,
if (resource_source->string_length) {
/* Point to the end of the AML descriptor */
- aml_resource_source = ((u8 *) aml) + minimum_length;
+ aml_resource_source = ACPI_ADD_PTR(u8, aml, minimum_length);
/* Copy the resource_source_index */
diff --git a/drivers/acpi/resources/rsxface.c b/drivers/acpi/resources/rsxface.c
index 09d250ab9872..50a956b705b0 100644
--- a/drivers/acpi/resources/rsxface.c
+++ b/drivers/acpi/resources/rsxface.c
@@ -64,6 +64,10 @@ ACPI_MODULE_NAME("rsxface")
ACPI_COPY_FIELD(out, in, translation_offset); \
ACPI_COPY_FIELD(out, in, address_length); \
ACPI_COPY_FIELD(out, in, resource_source);
+/* Local prototypes */
+static acpi_status
+acpi_rs_match_vendor_resource(struct acpi_resource *resource, void *context);
+
/*******************************************************************************
*
* FUNCTION: acpi_get_irq_routing_table
@@ -86,6 +90,7 @@ ACPI_MODULE_NAME("rsxface")
* the object indicated by the passed device_handle.
*
******************************************************************************/
+
acpi_status
acpi_get_irq_routing_table(acpi_handle device_handle,
struct acpi_buffer *ret_buffer)
@@ -222,12 +227,12 @@ EXPORT_SYMBOL(acpi_get_possible_resources);
*
* FUNCTION: acpi_walk_resources
*
- * PARAMETERS: device_handle - a handle to the device object for the
+ * PARAMETERS: device_handle - Handle to the device object for the
* device we are querying
- * Path - method name of the resources we want
+ * Name - Method name of the resources we want
* (METHOD_NAME__CRS or METHOD_NAME__PRS)
- * user_function - called for each resource
- * Context - passed to user_function
+ * user_function - Called for each resource
+ * Context - Passed to user_function
*
* RETURN: Status
*
@@ -239,79 +244,74 @@ EXPORT_SYMBOL(acpi_get_possible_resources);
acpi_status
acpi_walk_resources(acpi_handle device_handle,
- char *path,
+ char *name,
ACPI_WALK_RESOURCE_CALLBACK user_function, void *context)
{
acpi_status status;
- struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
+ struct acpi_buffer buffer;
struct acpi_resource *resource;
- struct acpi_resource *buffer_end;
+ struct acpi_resource *resource_end;
ACPI_FUNCTION_TRACE("acpi_walk_resources");
- if (!device_handle ||
- (ACPI_STRNCMP(path, METHOD_NAME__CRS, sizeof(METHOD_NAME__CRS)) &&
- ACPI_STRNCMP(path, METHOD_NAME__PRS, sizeof(METHOD_NAME__PRS)))) {
+ /* Parameter validation */
+
+ if (!device_handle || !user_function || !name ||
+ (ACPI_STRNCMP(name, METHOD_NAME__CRS, sizeof(METHOD_NAME__CRS)) &&
+ ACPI_STRNCMP(name, METHOD_NAME__PRS, sizeof(METHOD_NAME__PRS)))) {
return_ACPI_STATUS(AE_BAD_PARAMETER);
}
- status = acpi_rs_get_method_data(device_handle, path, &buffer);
+ /* Get the _CRS or _PRS resource list */
+
+ buffer.length = ACPI_ALLOCATE_LOCAL_BUFFER;
+ status = acpi_rs_get_method_data(device_handle, name, &buffer);
if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
- /* Setup pointers */
+ /* Buffer now contains the resource list */
- resource = (struct acpi_resource *)buffer.pointer;
- buffer_end = ACPI_CAST_PTR(struct acpi_resource,
- ((u8 *) buffer.pointer + buffer.length));
+ resource = ACPI_CAST_PTR(struct acpi_resource, buffer.pointer);
+ resource_end =
+ ACPI_ADD_PTR(struct acpi_resource, buffer.pointer, buffer.length);
- /* Walk the resource list */
+ /* Walk the resource list until the end_tag is found (or buffer end) */
- for (;;) {
- if (!resource || resource->type == ACPI_RESOURCE_TYPE_END_TAG) {
+ while (resource < resource_end) {
+ /* Sanity check the resource */
+
+ if (resource->type > ACPI_RESOURCE_TYPE_MAX) {
+ status = AE_AML_INVALID_RESOURCE_TYPE;
break;
}
- status = user_function(resource, context);
-
- switch (status) {
- case AE_OK:
- case AE_CTRL_DEPTH:
+ /* Invoke the user function, abort on any error returned */
- /* Just keep going */
+ status = user_function(resource, context);
+ if (ACPI_FAILURE(status)) {
+ if (status == AE_CTRL_TERMINATE) {
+ /* This is an OK termination by the user function */
- status = AE_OK;
+ status = AE_OK;
+ }
break;
+ }
- case AE_CTRL_TERMINATE:
-
- /* Exit now, with OK stats */
-
- status = AE_OK;
- goto cleanup;
-
- default:
-
- /* All others are valid exceptions */
+ /* end_tag indicates end-of-list */
- goto cleanup;
+ if (resource->type == ACPI_RESOURCE_TYPE_END_TAG) {
+ break;
}
/* Get the next resource descriptor */
- resource = ACPI_NEXT_RESOURCE(resource);
-
- /* Check for end-of-buffer */
-
- if (resource >= buffer_end) {
- goto cleanup;
- }
+ resource =
+ ACPI_ADD_PTR(struct acpi_resource, resource,
+ resource->length);
}
- cleanup:
-
- acpi_os_free(buffer.pointer);
+ ACPI_MEM_FREE(buffer.pointer);
return_ACPI_STATUS(status);
}
@@ -381,6 +381,12 @@ acpi_resource_to_address64(struct acpi_resource *resource,
struct acpi_resource_address16 *address16;
struct acpi_resource_address32 *address32;
+ if (!resource || !out) {
+ return (AE_BAD_PARAMETER);
+ }
+
+ /* Convert 16 or 32 address descriptor to 64 */
+
switch (resource->type) {
case ACPI_RESOURCE_TYPE_ADDRESS16:
@@ -410,3 +416,113 @@ acpi_resource_to_address64(struct acpi_resource *resource,
}
EXPORT_SYMBOL(acpi_resource_to_address64);
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_get_vendor_resource
+ *
+ * PARAMETERS: device_handle - Handle for the parent device object
+ * Name - Method name for the parent resource
+ * (METHOD_NAME__CRS or METHOD_NAME__PRS)
+ * Uuid - Pointer to the UUID to be matched.
+ * includes both subtype and 16-byte UUID
+ * ret_buffer - Where the vendor resource is returned
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Walk a resource template for the specified evice to find a
+ * vendor-defined resource that matches the supplied UUID and
+ * UUID subtype. Returns a struct acpi_resource of type Vendor.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_get_vendor_resource(acpi_handle device_handle,
+ char *name,
+ struct acpi_vendor_uuid * uuid,
+ struct acpi_buffer * ret_buffer)
+{
+ struct acpi_vendor_walk_info info;
+ acpi_status status;
+
+ /* Other parameters are validated by acpi_walk_resources */
+
+ if (!uuid || !ret_buffer) {
+ return (AE_BAD_PARAMETER);
+ }
+
+ info.uuid = uuid;
+ info.buffer = ret_buffer;
+ info.status = AE_NOT_EXIST;
+
+ /* Walk the _CRS or _PRS resource list for this device */
+
+ status =
+ acpi_walk_resources(device_handle, name,
+ acpi_rs_match_vendor_resource, &info);
+ if (ACPI_FAILURE(status)) {
+ return (status);
+ }
+
+ return (info.status);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_rs_match_vendor_resource
+ *
+ * PARAMETERS: ACPI_WALK_RESOURCE_CALLBACK
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Match a vendor resource via the ACPI 3.0 UUID
+ *
+ ******************************************************************************/
+
+static acpi_status
+acpi_rs_match_vendor_resource(struct acpi_resource *resource, void *context)
+{
+ struct acpi_vendor_walk_info *info = context;
+ struct acpi_resource_vendor_typed *vendor;
+ struct acpi_buffer *buffer;
+ acpi_status status;
+
+ /* Ignore all descriptors except Vendor */
+
+ if (resource->type != ACPI_RESOURCE_TYPE_VENDOR) {
+ return (AE_OK);
+ }
+
+ vendor = &resource->data.vendor_typed;
+
+ /*
+ * For a valid match, these conditions must hold:
+ *
+ * 1) Length of descriptor data must be at least as long as a UUID struct
+ * 2) The UUID subtypes must match
+ * 3) The UUID data must match
+ */
+ if ((vendor->byte_length < (ACPI_UUID_LENGTH + 1)) ||
+ (vendor->uuid_subtype != info->uuid->subtype) ||
+ (ACPI_MEMCMP(vendor->uuid, info->uuid->data, ACPI_UUID_LENGTH))) {
+ return (AE_OK);
+ }
+
+ /* Validate/Allocate/Clear caller buffer */
+
+ buffer = info->buffer;
+ status = acpi_ut_initialize_buffer(buffer, resource->length);
+ if (ACPI_FAILURE(status)) {
+ return (status);
+ }
+
+ /* Found the correct resource, copy and return it */
+
+ ACPI_MEMCPY(buffer->pointer, resource, resource->length);
+ buffer->length = resource->length;
+
+ /* Found the desired descriptor, terminate resource walk */
+
+ info->status = AE_OK;
+ return (AE_CTRL_TERMINATE);
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-22 18:03:01 +0000