+// SPDX-License-Identifier: GPL-2.0+
/*
* EFI application disk support
*
* Copyright (c) 2016 Alexander Graf
- *
- * SPDX-License-Identifier: GPL-2.0+
*/
#include <common.h>
#include <blk.h>
#include <dm.h>
#include <efi_loader.h>
-#include <inttypes.h>
+#include <fs.h>
#include <part.h>
#include <malloc.h>
-static const efi_guid_t efi_block_io_guid = BLOCK_IO_GUID;
+const efi_guid_t efi_block_io_guid = EFI_BLOCK_IO_PROTOCOL_GUID;
+/**
+ * struct efi_disk_obj - EFI disk object
+ *
+ * @header: EFI object header
+ * @ops: EFI disk I/O protocol interface
+ * @ifname: interface name for block device
+ * @dev_index: device index of block device
+ * @media: block I/O media information
+ * @dp: device path to the block device
+ * @part: partition
+ * @volume: simple file system protocol of the partition
+ * @offset: offset into disk for simple partition
+ * @desc: internal block device descriptor
+ */
struct efi_disk_obj {
- /* Generic EFI object parent class data */
- struct efi_object parent;
- /* EFI Interface callback struct for block I/O */
+ struct efi_object header;
struct efi_block_io ops;
- /* U-Boot ifname for block device */
const char *ifname;
- /* U-Boot dev_index for block device */
int dev_index;
- /* EFI Interface Media descriptor struct, referenced by ops */
struct efi_block_io_media media;
- /* EFI device path to this block device */
struct efi_device_path *dp;
- /* partition # */
unsigned int part;
- /* handle to filesys proto (for partition objects) */
struct efi_simple_file_system_protocol *volume;
- /* Offset into disk for simple partitions */
lbaint_t offset;
- /* Internal block device */
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 {
blocks = buffer_size / blksz;
lba += diskobj->offset;
- debug("EFI: %s:%d blocks=%x lba=%"PRIx64" blksz=%x dir=%d\n", __func__,
- __LINE__, blocks, lba, blksz, direction);
+ EFI_PRINT("blocks=%x lba=%llx blksz=%x dir=%d\n",
+ blocks, lba, blksz, direction);
/* We only support full block access */
if (buffer_size & (blksz - 1))
- return EFI_DEVICE_ERROR;
+ return EFI_BAD_BUFFER_SIZE;
if (direction == EFI_DISK_READ)
n = blk_dread(desc, lba, blocks, buffer);
/* We don't do interrupts, so check for timers cooperatively */
efi_timer_check();
- debug("EFI: %s:%d n=%lx blocks=%x\n", __func__, __LINE__, n, blocks);
+ EFI_PRINT("n=%lx blocks=%x\n", n, blocks);
if (n != blocks)
return EFI_DEVICE_ERROR;
}
static efi_status_t EFIAPI efi_disk_read_blocks(struct efi_block_io *this,
- u32 media_id, u64 lba, unsigned long buffer_size,
+ u32 media_id, u64 lba, efi_uintn_t buffer_size,
void *buffer)
{
void *real_buffer = buffer;
efi_status_t r;
+ if (!this)
+ return EFI_INVALID_PARAMETER;
+ /* TODO: check for media changes */
+ if (media_id != this->media->media_id)
+ 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))
+ return EFI_INVALID_PARAMETER;
+ if (lba * this->media->block_size + buffer_size >
+ this->media->last_block * this->media->block_size)
+ return EFI_INVALID_PARAMETER;
+
#ifdef CONFIG_EFI_LOADER_BOUNCE_BUFFER
if (buffer_size > EFI_LOADER_BOUNCE_BUFFER_SIZE) {
r = efi_disk_read_blocks(this, media_id, lba,
real_buffer = efi_bounce_buffer;
#endif
- EFI_ENTRY("%p, %x, %"PRIx64", %lx, %p", this, media_id, lba,
+ EFI_ENTRY("%p, %x, %llx, %zx, %p", this, media_id, lba,
buffer_size, buffer);
r = efi_disk_rw_blocks(this, media_id, lba, buffer_size, real_buffer,
}
static efi_status_t EFIAPI efi_disk_write_blocks(struct efi_block_io *this,
- u32 media_id, u64 lba, unsigned long buffer_size,
+ u32 media_id, u64 lba, efi_uintn_t buffer_size,
void *buffer)
{
void *real_buffer = buffer;
efi_status_t r;
+ if (!this)
+ return EFI_INVALID_PARAMETER;
+ if (this->media->read_only)
+ return EFI_WRITE_PROTECTED;
+ /* TODO: check for media changes */
+ if (media_id != this->media->media_id)
+ 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))
+ return EFI_INVALID_PARAMETER;
+ if (lba * this->media->block_size + buffer_size >
+ this->media->last_block * this->media->block_size)
+ return EFI_INVALID_PARAMETER;
+
#ifdef CONFIG_EFI_LOADER_BOUNCE_BUFFER
if (buffer_size > EFI_LOADER_BOUNCE_BUFFER_SIZE) {
r = efi_disk_write_blocks(this, media_id, lba,
real_buffer = efi_bounce_buffer;
#endif
- EFI_ENTRY("%p, %x, %"PRIx64", %lx, %p", this, media_id, lba,
+ EFI_ENTRY("%p, %x, %llx, %zx, %p", this, media_id, lba,
buffer_size, buffer);
/* Populate bounce buffer if necessary */
.flush_blocks = &efi_disk_flush_blocks,
};
-/*
- * Find filesystem from a device-path. The passed in path 'p' probably
- * contains one or more /File(name) nodes, so the comparison stops at
- * the first /File() node, and returns the pointer to that via 'rp'.
- * This is mostly intended to be a helper to map a device-path to an
- * efi_file_handle object.
+/**
+ * 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
*/
struct efi_simple_file_system_protocol *
-efi_fs_from_path(struct efi_device_path *fp)
+efi_fs_from_path(struct efi_device_path *full_path)
{
struct efi_object *efiobj;
- struct efi_disk_obj *diskobj;
+ struct efi_handler *handler;
+ struct efi_device_path *device_path;
+ struct efi_device_path *file_path;
+ efi_status_t ret;
- efiobj = efi_dp_find_obj(fp, NULL);
+ /* Split the path into a device part and a file part */
+ ret = efi_dp_split_file_path(full_path, &device_path, &file_path);
+ if (ret != EFI_SUCCESS)
+ return NULL;
+ efi_free_pool(file_path);
+
+ /* Get the EFI object for the partition */
+ efiobj = efi_dp_find_obj(device_path, NULL);
+ efi_free_pool(device_path);
if (!efiobj)
return NULL;
- diskobj = container_of(efiobj, struct efi_disk_obj, parent);
+ /* Find the simple file system protocol */
+ ret = efi_search_protocol(efiobj, &efi_simple_file_system_protocol_guid,
+ &handler);
+ if (ret != EFI_SUCCESS)
+ return NULL;
- return diskobj->volume;
+ /* Return the simple file system protocol for the partition */
+ return handler->protocol_interface;
+}
+
+/**
+ * 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;
}
/*
- * Create a device for a disk
+ * efi_disk_add_dev() - create a handle for a partition or disk
*
- * @name not used
- * @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
+ * @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
*/
-static void efi_disk_add_dev(const char *name,
- const char *if_typename,
- struct blk_desc *desc,
- int dev_index,
- lbaint_t offset,
- unsigned int part)
+static efi_status_t efi_disk_add_dev(
+ efi_handle_t parent,
+ struct efi_device_path *dp_parent,
+ const char *if_typename,
+ struct blk_desc *desc,
+ int dev_index,
+ lbaint_t offset,
+ unsigned int part,
+ struct efi_disk_obj **disk)
{
struct efi_disk_obj *diskobj;
efi_status_t ret;
/* Don't add empty devices */
if (!desc->lba)
- return;
+ return EFI_NOT_READY;
diskobj = calloc(1, sizeof(*diskobj));
if (!diskobj)
- goto out_of_memory;
+ return EFI_OUT_OF_RESOURCES;
/* Hook up to the device list */
- list_add_tail(&diskobj->parent.link, &efi_obj_list);
+ efi_add_handle(&diskobj->header);
/* Fill in object data */
- diskobj->dp = efi_dp_from_part(desc, part);
+ if (part) {
+ struct efi_device_path *node = efi_dp_part_node(desc, part);
+
+ diskobj->dp = efi_dp_append_node(dp_parent, node);
+ efi_free_pool(node);
+ } else {
+ diskobj->dp = efi_dp_from_part(desc, part);
+ }
diskobj->part = part;
- diskobj->parent.handle = diskobj;
- ret = efi_add_protocol(diskobj->parent.handle, &efi_block_io_guid,
+ ret = efi_add_protocol(&diskobj->header, &efi_block_io_guid,
&diskobj->ops);
if (ret != EFI_SUCCESS)
- goto out_of_memory;
- ret = efi_add_protocol(diskobj->parent.handle, &efi_guid_device_path,
+ return ret;
+ ret = efi_add_protocol(&diskobj->header, &efi_guid_device_path,
diskobj->dp);
if (ret != EFI_SUCCESS)
- goto out_of_memory;
- if (part >= 1) {
+ return ret;
+ /* partitions or whole disk without partitions */
+ 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->parent.handle,
+ ret = efi_add_protocol(&diskobj->header,
&efi_simple_file_system_protocol_guid,
- &diskobj->volume);
+ diskobj->volume);
if (ret != EFI_SUCCESS)
- goto out_of_memory;
+ return ret;
}
diskobj->ops = block_io_disk_template;
diskobj->ifname = if_typename;
/* Fill in EFI IO Media info (for read/write callbacks) */
diskobj->media.removable_media = desc->removable;
diskobj->media.media_present = 1;
+ /*
+ * MediaID is just an arbitrary counter.
+ * We have to change it if the medium is removed or changed.
+ */
+ 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)
+ diskobj->media.logical_partition = 1;
diskobj->ops.media = &diskobj->media;
- return;
-out_of_memory:
- printf("ERROR: Out of memory\n");
+ if (disk)
+ *disk = diskobj;
+ return EFI_SUCCESS;
}
-static int efi_disk_create_eltorito(struct blk_desc *desc,
- const char *if_typename,
- int diskid,
- const char *pdevname)
+/**
+ * efi_disk_create_partitions() - create handles and protocols for partitions
+ *
+ * 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
+ */
+int efi_disk_create_partitions(efi_handle_t parent, struct blk_desc *desc,
+ const char *if_typename, int diskid,
+ const char *pdevname)
{
int disks = 0;
-#if CONFIG_IS_ENABLED(ISO_PARTITION)
char devname[32] = { 0 }; /* dp->str is u16[32] long */
disk_partition_t info;
int part;
+ struct efi_device_path *dp = NULL;
+ efi_status_t ret;
+ struct efi_handler *handler;
- if (desc->part_type != PART_TYPE_ISO)
- return 0;
+ /* 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;
- /* and devices for each partition: */
+ /* 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);
- efi_disk_add_dev(devname, if_typename, desc, diskid,
- info.start, 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++;
}
- /* ... and add block device: */
- efi_disk_add_dev(devname, if_typename, desc, diskid, 0, 0);
-#endif
-
return disks;
}
-/*
+/**
+ * efi_disk_register() - register block devices
+ *
* 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.
*
+ * This function is called in efi_init_obj_list().
+ *
* TODO(sjg@chromium.org): Actually with CONFIG_BLK, U-Boot does have this.
* Consider converting the code to look up devices as needed. The EFI device
* could be a child of the UCLASS_BLK block device, perhaps.
*
- * This gets called from do_bootefi_exec().
+ * Return: status code
*/
-int efi_disk_register(void)
+efi_status_t efi_disk_register(void)
{
+ struct efi_disk_obj *disk;
int disks = 0;
+ efi_status_t ret;
#ifdef CONFIG_BLK
struct udevice *dev;
- for (uclass_first_device_check(UCLASS_BLK, &dev);
- dev;
+ 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 = dev->driver->name;
- disk_partition_t info;
- int part;
+ 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);
-
- /* add devices for each partition: */
- for (part = 1; part <= MAX_SEARCH_PARTITIONS; part++) {
- if (part_get_info(desc, part, &info))
- continue;
- efi_disk_add_dev(dev->name, if_typename, desc,
- desc->devnum, 0, part);
+ 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;
}
-
- /* ... and add block device: */
- efi_disk_add_dev(dev->name, if_typename, desc,
- desc->devnum, 0, 0);
-
disks++;
- /*
- * El Torito images show up as block devices in an EFI world,
- * so let's create them here
- */
- disks += efi_disk_create_eltorito(desc, if_typename,
- desc->devnum, dev->name);
+ /* Partitions show up as block devices in EFI */
+ disks += efi_disk_create_partitions(
+ &disk->header, desc, if_typename,
+ desc->devnum, dev->name);
}
#else
int i, if_type;
for (i = 0; i < 4; i++) {
struct blk_desc *desc;
char devname[32] = { 0 }; /* dp->str is u16[32] long */
- disk_partition_t info;
- int part;
desc = blk_get_devnum_by_type(if_type, i);
if (!desc)
snprintf(devname, sizeof(devname), "%s%d",
if_typename, i);
- /* add devices for each partition: */
- for (part = 1; part <= MAX_SEARCH_PARTITIONS; part++) {
- if (part_get_info(desc, part, &info))
- continue;
- efi_disk_add_dev(devname, if_typename, desc,
- i, 0, part);
+ /* 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;
}
-
- /* ... and add block device: */
- efi_disk_add_dev(devname, if_typename, desc, i, 0, 0);
disks++;
- /*
- * El Torito images show up as block devices
- * in an EFI world, so let's create them here
- */
- disks += efi_disk_create_eltorito(desc, if_typename,
- i, devname);
+ /* Partitions show up as block devices in EFI */
+ disks += efi_disk_create_partitions
+ (&disk->header, desc,
+ if_typename, i, devname);
}
}
#endif
printf("Found %d disks\n", disks);
- return 0;
+ return EFI_SUCCESS;
}
projects / oweals / u-boot.git / blobdiff