1 // SPDX-License-Identifier: GPL-2.0+
3  *  EFI application disk support
18  * struct efi_disk_obj - EFI disk object
20  * @header:	EFI object header
21  * @ops:	EFI disk I/O protocol interface
28  * @offset:	offset into disk for simple partition
67 	desc = (struct blk_desc *) diskobj->desc;  in efi_disk_rw_blocks()
68 	blksz = desc->blksz;  in efi_disk_rw_blocks()
70 	lba += diskobj->offset;  in efi_disk_rw_blocks()
72 	debug("EFI: %s:%d blocks=%x lba=%llx blksz=%x dir=%d\n", __func__,  in efi_disk_rw_blocks()
76 	if (buffer_size & (blksz - 1))  in efi_disk_rw_blocks()
87 	debug("EFI: %s:%d n=%lx blocks=%x\n", __func__, __LINE__, n, blocks);  in efi_disk_rw_blocks()
109 			EFI_LOADER_BOUNCE_BUFFER_SIZE / this->media->block_size,  in efi_disk_read_blocks()
110 			buffer_size - EFI_LOADER_BOUNCE_BUFFER_SIZE,  in efi_disk_read_blocks()
144 			EFI_LOADER_BOUNCE_BUFFER_SIZE / this->media->block_size,  in efi_disk_write_blocks()
145 			buffer_size - EFI_LOADER_BOUNCE_BUFFER_SIZE,  in efi_disk_write_blocks()
204 	/* Get the EFI object for the partition */  in efi_fs_from_path()
217 	return handler->protocol_interface;  in efi_fs_from_path()
221  * Create a handle for a partition or disk
228  * @offset	offset into disk for simple partitions
229  * @return	disk object
239 				struct efi_disk_obj **disk)  in efi_disk_add_dev()  argument
245 	if (!desc->lba)  in efi_disk_add_dev()
253 	efi_add_handle(&diskobj->header);  in efi_disk_add_dev()
259 		diskobj->dp = efi_dp_append_node(dp_parent, node);  in efi_disk_add_dev()
262 		diskobj->dp = efi_dp_from_part(desc, part);  in efi_disk_add_dev()
264 	diskobj->part = part;  in efi_disk_add_dev()
265 	ret = efi_add_protocol(&diskobj->header, &efi_block_io_guid,  in efi_disk_add_dev()
266 			       &diskobj->ops);  in efi_disk_add_dev()
269 	ret = efi_add_protocol(&diskobj->header, &efi_guid_device_path,  in efi_disk_add_dev()
270 			       diskobj->dp);  in efi_disk_add_dev()
274 		diskobj->volume = efi_simple_file_system(desc, part,  in efi_disk_add_dev()
275 							 diskobj->dp);  in efi_disk_add_dev()
276 		ret = efi_add_protocol(&diskobj->header,  in efi_disk_add_dev()
278 				       diskobj->volume);  in efi_disk_add_dev()
282 	diskobj->ops = block_io_disk_template;  in efi_disk_add_dev()
283 	diskobj->ifname = if_typename;  in efi_disk_add_dev()
284 	diskobj->dev_index = dev_index;  in efi_disk_add_dev()
285 	diskobj->offset = offset;  in efi_disk_add_dev()
286 	diskobj->desc = desc;  in efi_disk_add_dev()
288 	/* Fill in EFI IO Media info (for read/write callbacks) */  in efi_disk_add_dev()
289 	diskobj->media.removable_media = desc->removable;  in efi_disk_add_dev()
290 	diskobj->media.media_present = 1;  in efi_disk_add_dev()
291 	diskobj->media.block_size = desc->blksz;  in efi_disk_add_dev()
292 	diskobj->media.io_align = desc->blksz;  in efi_disk_add_dev()
293 	diskobj->media.last_block = desc->lba - offset;  in efi_disk_add_dev()
295 		diskobj->media.logical_partition = 1;  in efi_disk_add_dev()
296 	diskobj->ops.media = &diskobj->media;  in efi_disk_add_dev()
297 	if (disk)  in efi_disk_add_dev()
298 		*disk = diskobj;  in efi_disk_add_dev()
305  * @parent		handle of the parent disk
317 	char devname[32] = { 0 }; /* dp->str is u16[32] long */  in efi_disk_create_partitions()
327 		dp = handler->protocol_interface;  in efi_disk_create_partitions()
348  * U-Boot doesn't have a list of all online disk devices. So when running our
349  * EFI payload, we scan through all of the potentially available ones and
352  * TODO(sjg@chromium.org): Actually with CONFIG_BLK, U-Boot does have this.
353  * Consider converting the code to look up devices as needed. The EFI device
360 	struct efi_disk_obj *disk;  in efi_disk_register()  local
369 		const char *if_typename = blk_get_if_type_name(desc->if_type);  in efi_disk_register()
372 		printf("Scanning disk %s...\n", dev->name);  in efi_disk_register()
374 					desc, desc->devnum, 0, 0, &disk);  in efi_disk_register()
376 			printf("Disk %s not ready\n", dev->name);  in efi_disk_register()
380 			printf("ERROR: failure to add disk device %s, r = %lu\n",  in efi_disk_register()
381 			       dev->name, ret & ~EFI_ERROR_MASK);  in efi_disk_register()
386 		/* Partitions show up as block devices in EFI */  in efi_disk_register()
388 					&disk->header, desc, if_typename,  in efi_disk_register()
389 					desc->devnum, dev->name);  in efi_disk_register()
394 	/* Search for all available disk devices */  in efi_disk_register()
403 		if_typename = cur_drvr->if_typename;  in efi_disk_register()
407 			char devname[32] = { 0 }; /* dp->str is u16[32] long */  in efi_disk_register()
412 			if (desc->type == DEV_TYPE_UNKNOWN)  in efi_disk_register()
420 					       i, 0, 0, &disk);  in efi_disk_register()
422 				printf("Disk %s not ready\n", devname);  in efi_disk_register()
426 				printf("ERROR: failure to add disk device %s, r = %lu\n",  in efi_disk_register()
432 			/* Partitions show up as block devices in EFI */  in efi_disk_register()
434 						(&disk->header, desc,  in efi_disk_register()