#include <part.h>
#include <malloc.h>
-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=%llx 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;
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,
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,
return EFI_OUT_OF_RESOURCES;
/* Hook up to the device list */
- efi_add_handle(&diskobj->parent);
+ efi_add_handle(&diskobj->header);
/* Fill in object data */
if (part) {
diskobj->dp = efi_dp_from_part(desc, part);
}
diskobj->part = part;
- 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)
return ret;
- ret = efi_add_protocol(diskobj->parent.handle, &efi_guid_device_path,
+ ret = efi_add_protocol(&diskobj->header, &efi_guid_device_path,
diskobj->dp);
if (ret != EFI_SUCCESS)
return ret;
if (part >= 1) {
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);
if (ret != EFI_SUCCESS)
/* 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;
/* Partitions show up as block devices in EFI */
disks += efi_disk_create_partitions(
- disk->parent.handle, desc, if_typename,
+ &disk->header, desc, if_typename,
desc->devnum, dev->name);
}
#else
disks++;
/* Partitions show up as block devices in EFI */
- disks += efi_disk_create_partitions(
- disk->parent.handle, desc,
- if_typename, i, devname);
+ disks += efi_disk_create_partitions
+ (&disk->header, desc,
+ if_typename, i, devname);
}
}
#endif
projects / oweals / u-boot.git / blobdiff