* Copyright (c) 2016 Alexander Graf
*/
+#define LOG_CATEGORY LOGC_EFI
+
#include <common.h>
#include <blk.h>
#include <dm.h>
+#include <dm/device-internal.h>
+#include <dm/tag.h>
+#include <event.h>
#include <efi_loader.h>
+#include <fs.h>
+#include <log.h>
#include <part.h>
#include <malloc.h>
+struct efi_system_partition efi_system_partition;
+
const efi_guid_t efi_block_io_guid = EFI_BLOCK_IO_PROTOCOL_GUID;
+const efi_guid_t efi_system_partition_guid = PARTITION_SYSTEM_GUID;
/**
* struct efi_disk_obj - EFI disk object
struct blk_desc *desc;
};
+/**
+ * efi_disk_reset() - reset block device
+ *
+ * This function implements the Reset service of the EFI_BLOCK_IO_PROTOCOL.
+ *
+ * As U-Boot's block devices do not have a reset function simply return
+ * EFI_SUCCESS.
+ *
+ * See the Unified Extensible Firmware Interface (UEFI) specification for
+ * details.
+ *
+ * @this: pointer to the BLOCK_IO_PROTOCOL
+ * @extended_verification: extended verification
+ * Return: status code
+ */
static efi_status_t EFIAPI efi_disk_reset(struct efi_block_io *this,
char extended_verification)
{
EFI_ENTRY("%p, %x", this, extended_verification);
- return EFI_EXIT(EFI_DEVICE_ERROR);
+ return EFI_EXIT(EFI_SUCCESS);
}
enum efi_disk_direction {
return EFI_SUCCESS;
}
+/**
+ * efi_disk_read_blocks() - reads blocks from device
+ *
+ * This function implements the ReadBlocks service of the EFI_BLOCK_IO_PROTOCOL.
+ *
+ * See the Unified Extensible Firmware Interface (UEFI) specification for
+ * details.
+ *
+ * @this: pointer to the BLOCK_IO_PROTOCOL
+ * @media_id: id of the medium to be read from
+ * @lba: starting logical block for reading
+ * @buffer_size: size of the read buffer
+ * @buffer: pointer to the destination buffer
+ * Return: status code
+ */
static efi_status_t EFIAPI efi_disk_read_blocks(struct efi_block_io *this,
u32 media_id, u64 lba, efi_uintn_t buffer_size,
void *buffer)
return EFI_MEDIA_CHANGED;
if (!this->media->media_present)
return EFI_NO_MEDIA;
- /* media->io_align is a power of 2 */
- if ((uintptr_t)buffer & (this->media->io_align - 1))
+ /* media->io_align is a power of 2 or 0 */
+ if (this->media->io_align &&
+ (uintptr_t)buffer & (this->media->io_align - 1))
return EFI_INVALID_PARAMETER;
if (lba * this->media->block_size + buffer_size >
- this->media->last_block * this->media->block_size)
+ (this->media->last_block + 1) * this->media->block_size)
return EFI_INVALID_PARAMETER;
#ifdef CONFIG_EFI_LOADER_BOUNCE_BUFFER
return EFI_EXIT(r);
}
+/**
+ * efi_disk_write_blocks() - writes blocks to device
+ *
+ * This function implements the WriteBlocks service of the
+ * EFI_BLOCK_IO_PROTOCOL.
+ *
+ * See the Unified Extensible Firmware Interface (UEFI) specification for
+ * details.
+ *
+ * @this: pointer to the BLOCK_IO_PROTOCOL
+ * @media_id: id of the medium to be written to
+ * @lba: starting logical block for writing
+ * @buffer_size: size of the write buffer
+ * @buffer: pointer to the source buffer
+ * Return: status code
+ */
static efi_status_t EFIAPI efi_disk_write_blocks(struct efi_block_io *this,
u32 media_id, u64 lba, efi_uintn_t buffer_size,
void *buffer)
return EFI_MEDIA_CHANGED;
if (!this->media->media_present)
return EFI_NO_MEDIA;
- /* media->io_align is a power of 2 */
- if ((uintptr_t)buffer & (this->media->io_align - 1))
+ /* media->io_align is a power of 2 or 0 */
+ if (this->media->io_align &&
+ (uintptr_t)buffer & (this->media->io_align - 1))
return EFI_INVALID_PARAMETER;
if (lba * this->media->block_size + buffer_size >
- this->media->last_block * this->media->block_size)
+ (this->media->last_block + 1) * this->media->block_size)
return EFI_INVALID_PARAMETER;
#ifdef CONFIG_EFI_LOADER_BOUNCE_BUFFER
return EFI_EXIT(r);
}
+/**
+ * efi_disk_flush_blocks() - flushes modified data to the device
+ *
+ * This function implements the FlushBlocks service of the
+ * EFI_BLOCK_IO_PROTOCOL.
+ *
+ * As we always write synchronously nothing is done here.
+ *
+ * See the Unified Extensible Firmware Interface (UEFI) specification for
+ * details.
+ *
+ * @this: pointer to the BLOCK_IO_PROTOCOL
+ * Return: status code
+ */
static efi_status_t EFIAPI efi_disk_flush_blocks(struct efi_block_io *this)
{
- /* We always write synchronously */
EFI_ENTRY("%p", this);
return EFI_EXIT(EFI_SUCCESS);
}
.flush_blocks = &efi_disk_flush_blocks,
};
-/*
- * Get the simple file system protocol for a file device path.
+/**
+ * efi_fs_from_path() - retrieve simple file system protocol
+ *
+ * Gets the simple file system protocol for a file device path.
*
* The full path provided is split into device part and into a file
* part. The device part is used to find the handle on which the
* simple file system protocol is installed.
*
- * @full_path device path including device and file
- * @return simple file system protocol
+ * @full_path: device path including device and file
+ * Return: simple file system protocol
*/
struct efi_simple_file_system_protocol *
efi_fs_from_path(struct efi_device_path *full_path)
efi_free_pool(file_path);
/* Get the EFI object for the partition */
- efiobj = efi_dp_find_obj(device_path, NULL);
+ efiobj = efi_dp_find_obj(device_path, NULL, NULL);
efi_free_pool(device_path);
if (!efiobj)
return NULL;
return handler->protocol_interface;
}
-/*
- * Create a handle for a partition or disk
- *
- * @parent parent handle
- * @dp_parent parent device path
- * @if_typename interface name for block device
- * @desc internal block device
- * @dev_index device index for block device
- * @offset offset into disk for simple partitions
- * @return disk object
+/**
+ * efi_fs_exists() - check if a partition bears a file system
+ *
+ * @desc: block device descriptor
+ * @part: partition number
+ * Return: 1 if a file system exists on the partition
+ * 0 otherwise
+ */
+static int efi_fs_exists(struct blk_desc *desc, int part)
+{
+ if (fs_set_blk_dev_with_part(desc, part))
+ return 0;
+
+ if (fs_get_type() == FS_TYPE_ANY)
+ return 0;
+
+ fs_close();
+
+ return 1;
+}
+
+/**
+ * efi_disk_add_dev() - create a handle for a partition or disk
+ *
+ * @parent: parent handle
+ * @dp_parent: parent device path
+ * @if_typename: interface name for block device
+ * @desc: internal block device
+ * @dev_index: device index for block device
+ * @part_info: partition info
+ * @part: partition
+ * @disk: pointer to receive the created handle
+ * Return: disk object
*/
static efi_status_t efi_disk_add_dev(
efi_handle_t parent,
const char *if_typename,
struct blk_desc *desc,
int dev_index,
- lbaint_t offset,
+ struct disk_partition *part_info,
unsigned int part,
struct efi_disk_obj **disk)
{
struct efi_disk_obj *diskobj;
+ struct efi_object *handle;
+ const efi_guid_t *guid = NULL;
efi_status_t ret;
/* Don't add empty devices */
efi_add_handle(&diskobj->header);
/* Fill in object data */
- if (part) {
+ if (part_info) {
struct efi_device_path *node = efi_dp_part_node(desc, part);
+ struct efi_handler *handler;
+ void *protocol_interface;
+
+ /* Parent must expose EFI_BLOCK_IO_PROTOCOL */
+ ret = efi_search_protocol(parent, &efi_block_io_guid, &handler);
+ if (ret != EFI_SUCCESS)
+ goto error;
+
+ /*
+ * Link the partition (child controller) to the block device
+ * (controller).
+ */
+ ret = efi_protocol_open(handler, &protocol_interface, NULL,
+ &diskobj->header,
+ EFI_OPEN_PROTOCOL_BY_CHILD_CONTROLLER);
+ if (ret != EFI_SUCCESS)
+ goto error;
diskobj->dp = efi_dp_append_node(dp_parent, node);
efi_free_pool(node);
+ diskobj->offset = part_info->start;
+ diskobj->media.last_block = part_info->size - 1;
+ if (part_info->bootable & PART_EFI_SYSTEM_PARTITION)
+ guid = &efi_system_partition_guid;
} else {
diskobj->dp = efi_dp_from_part(desc, part);
+ diskobj->offset = 0;
+ diskobj->media.last_block = desc->lba - 1;
}
diskobj->part = part;
- ret = efi_add_protocol(&diskobj->header, &efi_block_io_guid,
- &diskobj->ops);
- if (ret != EFI_SUCCESS)
- return ret;
- ret = efi_add_protocol(&diskobj->header, &efi_guid_device_path,
- diskobj->dp);
+
+ /*
+ * Install the device path and the block IO protocol.
+ *
+ * InstallMultipleProtocolInterfaces() checks if the device path is
+ * already installed on an other handle and returns EFI_ALREADY_STARTED
+ * in this case.
+ */
+ handle = &diskobj->header;
+ ret = EFI_CALL(efi_install_multiple_protocol_interfaces(
+ &handle, &efi_guid_device_path, diskobj->dp,
+ &efi_block_io_guid, &diskobj->ops,
+ guid, NULL, NULL));
if (ret != EFI_SUCCESS)
- return ret;
- if (part >= 1) {
+ goto error;
+
+ /*
+ * On partitions or whole disks without partitions install the
+ * simple file system protocol if a file system is available.
+ */
+ if ((part || desc->part_type == PART_TYPE_UNKNOWN) &&
+ efi_fs_exists(desc, part)) {
diskobj->volume = efi_simple_file_system(desc, part,
diskobj->dp);
ret = efi_add_protocol(&diskobj->header,
diskobj->ops = block_io_disk_template;
diskobj->ifname = if_typename;
diskobj->dev_index = dev_index;
- diskobj->offset = offset;
diskobj->desc = desc;
/* Fill in EFI IO Media info (for read/write callbacks) */
diskobj->media.media_id = 1;
diskobj->media.block_size = desc->blksz;
diskobj->media.io_align = desc->blksz;
- diskobj->media.last_block = desc->lba - offset;
- if (part != 0)
+ if (part)
diskobj->media.logical_partition = 1;
diskobj->ops.media = &diskobj->media;
if (disk)
*disk = diskobj;
+
+ EFI_PRINT("BlockIO: part %u, present %d, logical %d, removable %d"
+ ", offset " LBAF ", last_block %llu\n",
+ diskobj->part,
+ diskobj->media.media_present,
+ diskobj->media.logical_partition,
+ diskobj->media.removable_media,
+ diskobj->offset,
+ diskobj->media.last_block);
+
+ /* Store first EFI system partition */
+ if (part && !efi_system_partition.if_type) {
+ if (part_info->bootable & PART_EFI_SYSTEM_PARTITION) {
+ efi_system_partition.if_type = desc->if_type;
+ efi_system_partition.devnum = desc->devnum;
+ efi_system_partition.part = part;
+ EFI_PRINT("EFI system partition: %s %x:%x\n",
+ blk_get_if_type_name(desc->if_type),
+ desc->devnum, part);
+ }
+ }
return EFI_SUCCESS;
+error:
+ efi_delete_handle(&diskobj->header);
+ return ret;
}
/*
- * Create handles and protocols for the partitions of a block device
- *
- * @parent handle of the parent disk
- * @blk_desc block device
- * @if_typename interface type
- * @diskid device number
- * @pdevname device name
- * @return number of partitions created
+ * Create a handle for a whole raw disk
+ *
+ * @dev uclass device (UCLASS_BLK)
+ *
+ * Create an efi_disk object which is associated with @dev.
+ * The type of @dev must be UCLASS_BLK.
+ *
+ * @return 0 on success, -1 otherwise
*/
-int efi_disk_create_partitions(efi_handle_t parent, struct blk_desc *desc,
- const char *if_typename, int diskid,
- const char *pdevname)
+static int efi_disk_create_raw(struct udevice *dev)
{
- int disks = 0;
- char devname[32] = { 0 }; /* dp->str is u16[32] long */
- disk_partition_t info;
- int part;
- struct efi_device_path *dp = NULL;
+ struct efi_disk_obj *disk;
+ struct blk_desc *desc;
+ const char *if_typename;
+ int diskid;
efi_status_t ret;
- struct efi_handler *handler;
- /* Get the device path of the parent */
- ret = efi_search_protocol(parent, &efi_guid_device_path, &handler);
- if (ret == EFI_SUCCESS)
- dp = handler->protocol_interface;
-
- /* Add devices for each partition */
- for (part = 1; part <= MAX_SEARCH_PARTITIONS; part++) {
- if (part_get_info(desc, part, &info))
- continue;
- snprintf(devname, sizeof(devname), "%s:%d", pdevname,
- part);
- ret = efi_disk_add_dev(parent, dp, if_typename, desc, diskid,
- info.start, part, NULL);
- if (ret != EFI_SUCCESS) {
- printf("Adding partition %s failed\n", pdevname);
- continue;
- }
- disks++;
+ desc = dev_get_uclass_plat(dev);
+ if_typename = blk_get_if_type_name(desc->if_type);
+ diskid = desc->devnum;
+
+ ret = efi_disk_add_dev(NULL, NULL, if_typename, desc,
+ diskid, NULL, 0, &disk);
+ if (ret != EFI_SUCCESS) {
+ if (ret == EFI_NOT_READY)
+ log_notice("Disk %s not ready\n", dev->name);
+ else
+ log_err("Adding disk for %s failed\n", dev->name);
+
+ return -1;
+ }
+ if (dev_tag_set_ptr(dev, DM_TAG_EFI, &disk->header)) {
+ efi_free_pool(disk->dp);
+ efi_delete_handle(&disk->header);
+
+ return -1;
}
- return disks;
+ return 0;
}
/*
- * U-Boot doesn't have a list of all online disk devices. So when running our
- * EFI payload, we scan through all of the potentially available ones and
- * store them in our object pool.
+ * Create a handle for a disk partition
+ *
+ * @dev uclass device (UCLASS_PARTITION)
*
- * Consider converting the code to look up devices as needed. The EFI device
- * could be a child of the UCLASS_BLK block device, perhaps.
+ * Create an efi_disk object which is associated with @dev.
+ * The type of @dev must be UCLASS_PARTITION.
*
- * This gets called from do_bootefi_exec().
+ * @return 0 on success, -1 otherwise
*/
-efi_status_t efi_disk_register(void)
+static int efi_disk_create_part(struct udevice *dev)
{
+ efi_handle_t parent;
+ struct blk_desc *desc;
+ const char *if_typename;
+ struct disk_part *part_data;
+ struct disk_partition *info;
+ unsigned int part;
+ int diskid;
+ struct efi_handler *handler;
+ struct efi_device_path *dp_parent;
struct efi_disk_obj *disk;
- int disks = 0;
efi_status_t ret;
-#ifdef CONFIG_BLK
+
+ if (dev_tag_get_ptr(dev_get_parent(dev), DM_TAG_EFI, (void **)&parent))
+ return -1;
+
+ desc = dev_get_uclass_plat(dev_get_parent(dev));
+ if_typename = blk_get_if_type_name(desc->if_type);
+ diskid = desc->devnum;
+
+ part_data = dev_get_uclass_plat(dev);
+ part = part_data->partnum;
+ info = &part_data->gpt_part_info;
+
+ ret = efi_search_protocol(parent, &efi_guid_device_path, &handler);
+ if (ret != EFI_SUCCESS)
+ return -1;
+ dp_parent = (struct efi_device_path *)handler->protocol_interface;
+
+ ret = efi_disk_add_dev(parent, dp_parent, if_typename, desc, diskid,
+ info, part, &disk);
+ if (ret != EFI_SUCCESS) {
+ log_err("Adding partition for %s failed\n", dev->name);
+ return -1;
+ }
+ if (dev_tag_set_ptr(dev, DM_TAG_EFI, &disk->header)) {
+ efi_free_pool(disk->dp);
+ efi_delete_handle(&disk->header);
+
+ return -1;
+ }
+
+ return 0;
+}
+
+/*
+ * Create efi_disk objects for a block device
+ *
+ * @dev uclass device (UCLASS_BLK)
+ *
+ * Create efi_disk objects for partitions as well as a raw disk
+ * which is associated with @dev.
+ * The type of @dev must be UCLASS_BLK.
+ * This function is expected to be called at EV_PM_POST_PROBE.
+ *
+ * @return 0 on success, -1 otherwise
+ */
+static int efi_disk_probe(void *ctx, struct event *event)
+{
struct udevice *dev;
+ enum uclass_id id;
+ struct blk_desc *desc;
+ struct udevice *child;
+ int ret;
- for (uclass_first_device_check(UCLASS_BLK, &dev); dev;
- uclass_next_device_check(&dev)) {
- struct blk_desc *desc = dev_get_uclass_platdata(dev);
- const char *if_typename = blk_get_if_type_name(desc->if_type);
-
- /* Add block device for the full device */
- printf("Scanning disk %s...\n", dev->name);
- ret = efi_disk_add_dev(NULL, NULL, if_typename,
- desc, desc->devnum, 0, 0, &disk);
- if (ret == EFI_NOT_READY) {
- printf("Disk %s not ready\n", dev->name);
- continue;
- }
- if (ret) {
- printf("ERROR: failure to add disk device %s, r = %lu\n",
- dev->name, ret & ~EFI_ERROR_MASK);
- return ret;
- }
- disks++;
+ dev = event->data.dm.dev;
+ id = device_get_uclass_id(dev);
- /* Partitions show up as block devices in EFI */
- disks += efi_disk_create_partitions(
- &disk->header, desc, if_typename,
- desc->devnum, dev->name);
+ /* TODO: We won't support partitions in a partition */
+ if (id != UCLASS_BLK)
+ return 0;
+
+ /*
+ * avoid creating duplicated objects now that efi_driver
+ * has already created an efi_disk at this moment.
+ */
+ desc = dev_get_uclass_plat(dev);
+ if (desc->if_type != IF_TYPE_EFI_LOADER) {
+ ret = efi_disk_create_raw(dev);
+ if (ret)
+ return -1;
}
-#else
- int i, if_type;
-
- /* Search for all available disk devices */
- for (if_type = 0; if_type < IF_TYPE_COUNT; if_type++) {
- const struct blk_driver *cur_drvr;
- const char *if_typename;
-
- cur_drvr = blk_driver_lookup_type(if_type);
- if (!cur_drvr)
- continue;
-
- if_typename = cur_drvr->if_typename;
- printf("Scanning disks on %s...\n", if_typename);
- for (i = 0; i < 4; i++) {
- struct blk_desc *desc;
- char devname[32] = { 0 }; /* dp->str is u16[32] long */
-
- desc = blk_get_devnum_by_type(if_type, i);
- if (!desc)
- continue;
- if (desc->type == DEV_TYPE_UNKNOWN)
- continue;
-
- snprintf(devname, sizeof(devname), "%s%d",
- if_typename, i);
-
- /* Add block device for the full device */
- ret = efi_disk_add_dev(NULL, NULL, if_typename, desc,
- i, 0, 0, &disk);
- if (ret == EFI_NOT_READY) {
- printf("Disk %s not ready\n", devname);
- continue;
- }
- if (ret) {
- printf("ERROR: failure to add disk device %s, r = %lu\n",
- devname, ret & ~EFI_ERROR_MASK);
- return ret;
- }
- disks++;
-
- /* Partitions show up as block devices in EFI */
- disks += efi_disk_create_partitions
- (&disk->header, desc,
- if_typename, i, devname);
- }
+
+ device_foreach_child(child, dev) {
+ ret = efi_disk_create_part(child);
+ if (ret)
+ return -1;
+ }
+
+ return 0;
+}
+
+/*
+ * Delete an efi_disk object for a whole raw disk
+ *
+ * @dev uclass device (UCLASS_BLK)
+ *
+ * Delete an efi_disk object which is associated with @dev.
+ * The type of @dev must be UCLASS_BLK.
+ *
+ * @return 0 on success, -1 otherwise
+ */
+static int efi_disk_delete_raw(struct udevice *dev)
+{
+ efi_handle_t handle;
+ struct efi_disk_obj *diskobj;
+
+ if (dev_tag_get_ptr(dev, DM_TAG_EFI, (void **)&handle))
+ return -1;
+
+ diskobj = container_of(handle, struct efi_disk_obj, header);
+ efi_free_pool(diskobj->dp);
+
+ efi_delete_handle(handle);
+ dev_tag_del(dev, DM_TAG_EFI);
+
+ return 0;
+}
+
+/*
+ * Delete an efi_disk object for a disk partition
+ *
+ * @dev uclass device (UCLASS_PARTITION)
+ *
+ * Delete an efi_disk object which is associated with @dev.
+ * The type of @dev must be UCLASS_PARTITION.
+ *
+ * @return 0 on success, -1 otherwise
+ */
+static int efi_disk_delete_part(struct udevice *dev)
+{
+ efi_handle_t handle;
+ struct efi_disk_obj *diskobj;
+
+ if (dev_tag_get_ptr(dev, DM_TAG_EFI, (void **)&handle))
+ return -1;
+
+ diskobj = container_of(handle, struct efi_disk_obj, header);
+
+ efi_free_pool(diskobj->dp);
+ efi_delete_handle(handle);
+ dev_tag_del(dev, DM_TAG_EFI);
+
+ return 0;
+}
+
+/*
+ * Delete an efi_disk object for a block device
+ *
+ * @dev uclass device (UCLASS_BLK or UCLASS_PARTITION)
+ *
+ * Delete an efi_disk object which is associated with @dev.
+ * The type of @dev must be either UCLASS_BLK or UCLASS_PARTITION.
+ * This function is expected to be called at EV_PM_PRE_REMOVE.
+ *
+ * @return 0 on success, -1 otherwise
+ */
+static int efi_disk_remove(void *ctx, struct event *event)
+{
+ enum uclass_id id;
+ struct udevice *dev;
+
+ dev = event->data.dm.dev;
+ id = device_get_uclass_id(dev);
+
+ if (id == UCLASS_BLK)
+ return efi_disk_delete_raw(dev);
+ else if (id == UCLASS_PARTITION)
+ return efi_disk_delete_part(dev);
+ else
+ return 0;
+}
+
+efi_status_t efi_disk_init(void)
+{
+ int ret;
+
+ ret = event_register("efi_disk add", EVT_DM_POST_PROBE,
+ efi_disk_probe, NULL);
+ if (ret) {
+ log_err("Event registration for efi_disk add failed\n");
+ return EFI_OUT_OF_RESOURCES;
+ }
+
+ ret = event_register("efi_disk del", EVT_DM_PRE_REMOVE,
+ efi_disk_remove, NULL);
+ if (ret) {
+ log_err("Event registration for efi_disk del failed\n");
+ return EFI_OUT_OF_RESOURCES;
}
-#endif
- printf("Found %d disks\n", disks);
return EFI_SUCCESS;
}
projects / u-boot.git / blobdiff