static int acpi_memory_device_add(struct acpi_device *device);
static int acpi_memory_device_remove(struct acpi_device *device, int type);
+static int acpi_memory_device_start(struct acpi_device *device);
static struct acpi_driver acpi_memory_device_driver = {
.name = ACPI_MEMORY_DEVICE_DRIVER_NAME,
.ops = {
.add = acpi_memory_device_add,
.remove = acpi_memory_device_remove,
+ .start = acpi_memory_device_start,
},
};
+struct acpi_memory_info {
+ struct list_head list;
+ u64 start_addr; /* Memory Range start physical addr */
+ u64 length; /* Memory Range length */
+ unsigned short caching; /* memory cache attribute */
+ unsigned short write_protect; /* memory read/write attribute */
+ unsigned int enabled:1;
+};
+
struct acpi_memory_device {
acpi_handle handle;
unsigned int state; /* State of the memory device */
- unsigned short caching; /* memory cache attribute */
- unsigned short write_protect; /* memory read/write attribute */
- u64 start_addr; /* Memory Range start physical addr */
- u64 end_addr; /* Memory Range end physical addr */
+ struct list_head res_list;
};
+static acpi_status
+acpi_memory_get_resource(struct acpi_resource *resource, void *context)
+{
+ struct acpi_memory_device *mem_device = context;
+ struct acpi_resource_address64 address64;
+ struct acpi_memory_info *info, *new;
+ acpi_status status;
+
+ status = acpi_resource_to_address64(resource, &address64);
+ if (ACPI_FAILURE(status) ||
+ (address64.resource_type != ACPI_MEMORY_RANGE))
+ return AE_OK;
+
+ list_for_each_entry(info, &mem_device->res_list, list) {
+ /* Can we combine the resource range information? */
+ if ((info->caching == address64.info.mem.caching) &&
+ (info->write_protect == address64.info.mem.write_protect) &&
+ (info->start_addr + info->length == address64.minimum)) {
+ info->length += address64.address_length;
+ return AE_OK;
+ }
+ }
+
+ new = kzalloc(sizeof(struct acpi_memory_info), GFP_KERNEL);
+ if (!new)
+ return AE_ERROR;
+
+ INIT_LIST_HEAD(&new->list);
+ new->caching = address64.info.mem.caching;
+ new->write_protect = address64.info.mem.write_protect;
+ new->start_addr = address64.minimum;
+ new->length = address64.address_length;
+ list_add_tail(&new->list, &mem_device->res_list);
+
+ return AE_OK;
+}
+
static int
acpi_memory_get_device_resources(struct acpi_memory_device *mem_device)
{
acpi_status status;
- struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
- struct acpi_resource *resource = NULL;
- struct acpi_resource_address64 address64;
+ struct acpi_memory_info *info, *n;
ACPI_FUNCTION_TRACE("acpi_memory_get_device_resources");
- /* Get the range from the _CRS */
- status = acpi_get_current_resources(mem_device->handle, &buffer);
- if (ACPI_FAILURE(status))
- return_VALUE(-EINVAL);
-
- resource = (struct acpi_resource *)buffer.pointer;
- status = acpi_resource_to_address64(resource, &address64);
- if (ACPI_SUCCESS(status)) {
- if (address64.resource_type == ACPI_MEMORY_RANGE) {
- /* Populate the structure */
- mem_device->caching =
- address64.info.mem.caching;
- mem_device->write_protect =
- address64.info.mem.write_protect;
- mem_device->start_addr = address64.minimum;
- mem_device->end_addr = address64.maximum;
- }
+ status = acpi_walk_resources(mem_device->handle, METHOD_NAME__CRS,
+ acpi_memory_get_resource, mem_device);
+ if (ACPI_FAILURE(status)) {
+ list_for_each_entry_safe(info, n, &mem_device->res_list, list)
+ kfree(info);
+ return -EINVAL;
}
- acpi_os_free(buffer.pointer);
- return_VALUE(0);
+ return 0;
}
static int
static int acpi_memory_enable_device(struct acpi_memory_device *mem_device)
{
- int result;
+ int result, num_enabled = 0;
+ struct acpi_memory_info *info;
+ int node;
ACPI_FUNCTION_TRACE("acpi_memory_enable_device");
return result;
}
+ node = acpi_get_node(mem_device->handle);
/*
* Tell the VM there is more memory here...
* Note: Assume that this function returns zero on success
+ * We don't have memory-hot-add rollback function,now.
+ * (i.e. memory-hot-remove function)
*/
- result = add_memory(mem_device->start_addr,
- (mem_device->end_addr - mem_device->start_addr) + 1);
- if (result) {
+ list_for_each_entry(info, &mem_device->res_list, list) {
+ u64 start_pfn, end_pfn;
+
+ start_pfn = info->start_addr >> PAGE_SHIFT;
+ end_pfn = (info->start_addr + info->length - 1) >> PAGE_SHIFT;
+
+ if (pfn_valid(start_pfn) || pfn_valid(end_pfn)) {
+ /* already enabled. try next area */
+ num_enabled++;
+ continue;
+ }
+
+ result = add_memory(node, info->start_addr, info->length);
+ if (result)
+ continue;
+ info->enabled = 1;
+ num_enabled++;
+ }
+ if (!num_enabled) {
ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "\nadd_memory failed\n"));
mem_device->state = MEMORY_INVALID_STATE;
- return result;
+ return -EINVAL;
}
return result;
static int acpi_memory_disable_device(struct acpi_memory_device *mem_device)
{
int result;
- u64 start = mem_device->start_addr;
- u64 len = mem_device->end_addr - start + 1;
+ struct acpi_memory_info *info, *n;
ACPI_FUNCTION_TRACE("acpi_memory_disable_device");
* Ask the VM to offline this memory range.
* Note: Assume that this function returns zero on success
*/
- result = remove_memory(start, len);
- if (result) {
- ACPI_DEBUG_PRINT((ACPI_DB_ERROR, "Hot-Remove failed.\n"));
- return_VALUE(result);
+ list_for_each_entry_safe(info, n, &mem_device->res_list, list) {
+ if (info->enabled) {
+ result = remove_memory(info->start_addr, info->length);
+ if (result)
+ return result;
+ }
+ kfree(info);
}
/* Power-off and eject the device */
return_VALUE(-ENOMEM);
memset(mem_device, 0, sizeof(struct acpi_memory_device));
+ INIT_LIST_HEAD(&mem_device->res_list);
mem_device->handle = device->handle;
sprintf(acpi_device_name(device), "%s", ACPI_MEMORY_DEVICE_NAME);
sprintf(acpi_device_class(device), "%s", ACPI_MEMORY_DEVICE_CLASS);
return_VALUE(0);
}
+static int acpi_memory_device_start (struct acpi_device *device)
+{
+ struct acpi_memory_device *mem_device;
+ int result = 0;
+
+ ACPI_FUNCTION_TRACE("acpi_memory_device_start");
+
+ mem_device = acpi_driver_data(device);
+
+ if (!acpi_memory_check_device(mem_device)) {
+ /* call add_memory func */
+ result = acpi_memory_enable_device(mem_device);
+ if (result)
+ ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
+ "Error in acpi_memory_enable_device\n"));
+ }
+ return_VALUE(result);
+}
+
/*
* Helper function to check for memory device
*/
git.openpandora.org / pandora-kernel.git / blobdiff