diff options
author | Dave Kleikamp <shaggy@austin.ibm.com> | 2006-03-14 17:05:45 -0600 |
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committer | Dave Kleikamp <shaggy@austin.ibm.com> | 2006-03-14 17:05:45 -0600 |
commit | c5111f504d2a9b0d258d7c4752b4093523315989 (patch) | |
tree | 6a52864aff79691689aea21cb0cb928327d5de5b /drivers/acpi/resources/rsxface.c | |
parent | 69eb66d7da7dba2696281981347698e1693c2340 (diff) | |
parent | a488edc914aa1d766a4e2c982b5ae03d5657ec1b (diff) |
Merge with /home/shaggy/git/linus-clean/
Diffstat (limited to 'drivers/acpi/resources/rsxface.c')
-rw-r--r-- | drivers/acpi/resources/rsxface.c | 230 |
1 files changed, 173 insertions, 57 deletions
diff --git a/drivers/acpi/resources/rsxface.c b/drivers/acpi/resources/rsxface.c index ee5a5c50919..88b67077aee 100644 --- a/drivers/acpi/resources/rsxface.c +++ b/drivers/acpi/resources/rsxface.c @@ -5,7 +5,7 @@ ******************************************************************************/ /* - * Copyright (C) 2000 - 2005, R. Byron Moore + * Copyright (C) 2000 - 2006, R. Byron Moore * All rights reserved. * * Redistribution and use in source and binary forms, with or without @@ -57,13 +57,17 @@ ACPI_MODULE_NAME("rsxface") ACPI_COPY_FIELD(out, in, decode); \ ACPI_COPY_FIELD(out, in, min_address_fixed); \ ACPI_COPY_FIELD(out, in, max_address_fixed); \ - ACPI_COPY_FIELD(out, in, attribute); \ + ACPI_COPY_FIELD(out, in, info); \ ACPI_COPY_FIELD(out, in, granularity); \ - ACPI_COPY_FIELD(out, in, min_address_range); \ - ACPI_COPY_FIELD(out, in, max_address_range); \ - ACPI_COPY_FIELD(out, in, address_translation_offset); \ + ACPI_COPY_FIELD(out, in, minimum); \ + ACPI_COPY_FIELD(out, in, maximum); \ + 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->id == ACPI_RSTYPE_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); } @@ -360,8 +360,8 @@ EXPORT_SYMBOL(acpi_set_current_resources); * * FUNCTION: acpi_resource_to_address64 * - * PARAMETERS: resource - Pointer to a resource - * out - Pointer to the users's return + * PARAMETERS: Resource - Pointer to a resource + * Out - Pointer to the users's return * buffer (a struct * struct acpi_resource_address64) * @@ -381,20 +381,26 @@ acpi_resource_to_address64(struct acpi_resource *resource, struct acpi_resource_address16 *address16; struct acpi_resource_address32 *address32; - switch (resource->id) { - case ACPI_RSTYPE_ADDRESS16: + if (!resource || !out) { + return (AE_BAD_PARAMETER); + } + + /* Convert 16 or 32 address descriptor to 64 */ + + switch (resource->type) { + case ACPI_RESOURCE_TYPE_ADDRESS16: address16 = (struct acpi_resource_address16 *)&resource->data; ACPI_COPY_ADDRESS(out, address16); break; - case ACPI_RSTYPE_ADDRESS32: + case ACPI_RESOURCE_TYPE_ADDRESS32: address32 = (struct acpi_resource_address32 *)&resource->data; ACPI_COPY_ADDRESS(out, address32); break; - case ACPI_RSTYPE_ADDRESS64: + case ACPI_RESOURCE_TYPE_ADDRESS64: /* Simple copy for 64 bit source */ @@ -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); +} |