[thirdparty/u-boot.git] / lib / efi_loader / efi_disk.c

/*
 *  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 <part.h>
#include <malloc.h>

static const efi_guid_t efi_block_io_guid = BLOCK_IO_GUID;

struct efi_disk_obj {
	/* Generic EFI object parent class data */
	struct efi_object parent;
	/* EFI Interface callback struct for block I/O */
	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_file_path *dp;
	/* Offset into disk for simple partitions */
	lbaint_t offset;
	/* Internal block device */
	const struct blk_desc *desc;
};

static efi_status_t EFIAPI efi_disk_open_block(void *handle,
			efi_guid_t *protocol, void **protocol_interface,
			void *agent_handle, void *controller_handle,
			uint32_t attributes)
{
	struct efi_disk_obj *diskobj = handle;

	*protocol_interface = &diskobj->ops;

	return EFI_SUCCESS;
}

static efi_status_t EFIAPI efi_disk_open_dp(void *handle, efi_guid_t *protocol,
			void **protocol_interface, void *agent_handle,
			void *controller_handle, uint32_t attributes)
{
	struct efi_disk_obj *diskobj = handle;

	*protocol_interface = diskobj->dp;

	return EFI_SUCCESS;
}

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);
}

enum efi_disk_direction {
	EFI_DISK_READ,
	EFI_DISK_WRITE,
};

static efi_status_t EFIAPI efi_disk_rw_blocks(struct efi_block_io *this,
			u32 media_id, u64 lba, unsigned long buffer_size,
			void *buffer, enum efi_disk_direction direction)
{
	struct efi_disk_obj *diskobj;
	struct blk_desc *desc;
	int blksz;
	int blocks;
	unsigned long n;

	diskobj = container_of(this, struct efi_disk_obj, ops);
	desc = (struct blk_desc *) diskobj->desc;
	blksz = desc->blksz;
	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);

	/* We only support full block access */
	if (buffer_size & (blksz - 1))
		return EFI_EXIT(EFI_DEVICE_ERROR);

	if (direction == EFI_DISK_READ)
		n = blk_dread(desc, lba, blocks, buffer);
	else
		n = blk_dwrite(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);

	if (n != blocks)
		return EFI_EXIT(EFI_DEVICE_ERROR);

	return EFI_EXIT(EFI_SUCCESS);
}

static efi_status_t EFIAPI efi_disk_read_blocks(struct efi_block_io *this,
			u32 media_id, u64 lba, unsigned long buffer_size,
			void *buffer)
{
	void *real_buffer = buffer;
	efi_status_t r;

#ifdef CONFIG_EFI_LOADER_BOUNCE_BUFFER
	if (buffer_size > EFI_LOADER_BOUNCE_BUFFER_SIZE) {
		r = efi_disk_read_blocks(this, media_id, lba,
			EFI_LOADER_BOUNCE_BUFFER_SIZE, buffer);
		if (r != EFI_SUCCESS)
			return r;
		return efi_disk_read_blocks(this, media_id, lba +
			EFI_LOADER_BOUNCE_BUFFER_SIZE / this->media->block_size,
			buffer_size - EFI_LOADER_BOUNCE_BUFFER_SIZE,
			buffer + EFI_LOADER_BOUNCE_BUFFER_SIZE);
	}

	real_buffer = efi_bounce_buffer;
#endif

	EFI_ENTRY("%p, %x, %"PRIx64", %lx, %p", this, media_id, lba,
		  buffer_size, buffer);

	r = efi_disk_rw_blocks(this, media_id, lba, buffer_size, real_buffer,
			       EFI_DISK_READ);

	/* Copy from bounce buffer to real buffer if necessary */
	if ((r == EFI_SUCCESS) && (real_buffer != buffer))
		memcpy(buffer, real_buffer, buffer_size);

	return EFI_EXIT(r);
}

static efi_status_t EFIAPI efi_disk_write_blocks(struct efi_block_io *this,
			u32 media_id, u64 lba, unsigned long buffer_size,
			void *buffer)
{
	void *real_buffer = buffer;
	efi_status_t r;

#ifdef CONFIG_EFI_LOADER_BOUNCE_BUFFER
	if (buffer_size > EFI_LOADER_BOUNCE_BUFFER_SIZE) {
		r = efi_disk_write_blocks(this, media_id, lba,
			EFI_LOADER_BOUNCE_BUFFER_SIZE, buffer);
		if (r != EFI_SUCCESS)
			return r;
		return efi_disk_write_blocks(this, media_id, lba +
			EFI_LOADER_BOUNCE_BUFFER_SIZE / this->media->block_size,
			buffer_size - EFI_LOADER_BOUNCE_BUFFER_SIZE,
			buffer + EFI_LOADER_BOUNCE_BUFFER_SIZE);
	}

	real_buffer = efi_bounce_buffer;
#endif

	EFI_ENTRY("%p, %x, %"PRIx64", %lx, %p", this, media_id, lba,
		  buffer_size, buffer);

	/* Populate bounce buffer if necessary */
	if (real_buffer != buffer)
		memcpy(real_buffer, buffer, buffer_size);

	r = efi_disk_rw_blocks(this, media_id, lba, buffer_size, real_buffer,
			       EFI_DISK_WRITE);

	return EFI_EXIT(r);
}

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);
}

static const struct efi_block_io block_io_disk_template = {
	.reset = &efi_disk_reset,
	.read_blocks = &efi_disk_read_blocks,
	.write_blocks = &efi_disk_write_blocks,
	.flush_blocks = &efi_disk_flush_blocks,
};

static void efi_disk_add_dev(const char *name,
			     const char *if_typename,
			     const struct blk_desc *desc,
			     int dev_index,
			     lbaint_t offset)
{
	struct efi_disk_obj *diskobj;
	struct efi_device_path_file_path *dp;
	int objlen = sizeof(*diskobj) + (sizeof(*dp) * 2);

	/* Don't add empty devices */
	if (!desc->lba)
		return;

	diskobj = calloc(1, objlen);

	/* Fill in object data */
	diskobj->parent.protocols[0].guid = &efi_block_io_guid;
	diskobj->parent.protocols[0].open = efi_disk_open_block;
	diskobj->parent.protocols[1].guid = &efi_guid_device_path;
	diskobj->parent.protocols[1].open = efi_disk_open_dp;
	diskobj->parent.handle = diskobj;
	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.removable_media = desc->removable;
	diskobj->media.media_present = 1;
	diskobj->media.block_size = desc->blksz;
	diskobj->media.io_align = desc->blksz;
	diskobj->media.last_block = desc->lba - offset;
	diskobj->ops.media = &diskobj->media;

	/* Fill in device path */
	dp = (void*)&diskobj[1];
	diskobj->dp = dp;
	dp[0].dp.type = DEVICE_PATH_TYPE_MEDIA_DEVICE;
	dp[0].dp.sub_type = DEVICE_PATH_SUB_TYPE_FILE_PATH;
	dp[0].dp.length = sizeof(*dp);
	ascii2unicode(dp[0].str, name);

	dp[1].dp.type = DEVICE_PATH_TYPE_END;
	dp[1].dp.sub_type = DEVICE_PATH_SUB_TYPE_END;
	dp[1].dp.length = sizeof(*dp);

	/* Hook up to the device list */
	list_add_tail(&diskobj->parent.link, &efi_obj_list);
}

static int efi_disk_create_eltorito(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 = 1;

	if (desc->part_type != PART_TYPE_ISO)
		return 0;

	while (!part_get_info(desc, part, &info)) {
		snprintf(devname, sizeof(devname), "%s:%d", pdevname,
			 part);
		efi_disk_add_dev(devname, if_typename, desc, diskid,
				 info.start);
		part++;
		disks++;
	}
#endif

	return disks;
}

/*
 * 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.
 *
 * 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().
 */
int efi_disk_register(void)
{
	int disks = 0;
#ifdef CONFIG_BLK
	struct udevice *dev;

	for (uclass_first_device(UCLASS_BLK, &dev);
	     dev;
	     uclass_next_device(&dev)) {
		struct blk_desc *desc = dev_get_uclass_platdata(dev);
		const char *if_typename = dev->driver->name;

		printf("Scanning disk %s...\n", dev->name);
		efi_disk_add_dev(dev->name, if_typename, desc, desc->devnum, 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);
	}
#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);
			efi_disk_add_dev(devname, if_typename, desc, i, 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);
		}
	}
#endif
	printf("Found %d disks\n", disks);

	return 0;
}
Commit	Line	Data
2a22d05d AG	1	/*
	2	* EFI application disk support
	3	*
	4	* Copyright (c) 2016 Alexander Graf
	5	*
	6	* SPDX-License-Identifier: GPL-2.0+
	7	*/
	8
	9	#include <common.h>
6dd9faf8	10	#include <blk.h>
487d756f	11	#include <dm.h>
2a22d05d AG	12	#include <efi_loader.h>
	13	#include <inttypes.h>
	14	#include <part.h>
	15	#include <malloc.h>
	16
	17	static const efi_guid_t efi_block_io_guid = BLOCK_IO_GUID;
	18
	19	struct efi_disk_obj {
	20	/* Generic EFI object parent class data */
	21	struct efi_object parent;
	22	/* EFI Interface callback struct for block I/O */
	23	struct efi_block_io ops;
	24	/* U-Boot ifname for block device */
	25	const char *ifname;
	26	/* U-Boot dev_index for block device */
	27	int dev_index;
	28	/* EFI Interface Media descriptor struct, referenced by ops */
	29	struct efi_block_io_media media;
	30	/* EFI device path to this block device */
	31	struct efi_device_path_file_path *dp;
8c3df0bf AG	32	/* Offset into disk for simple partitions */
8c3df0bf AG	33	lbaint_t offset;
f9d334bd AG	34	/* Internal block device */
f9d334bd AG	35	const struct blk_desc *desc;
2a22d05d AG	36	};
2a22d05d AG	37
e275458c SG	38	static efi_status_t EFIAPI efi_disk_open_block(void *handle,
	39	efi_guid_t protocol, void *protocol_interface,
	40	void agent_handle, void controller_handle,
	41	uint32_t attributes)
2a22d05d AG	42	{
	43	struct efi_disk_obj *diskobj = handle;
	44
	45	*protocol_interface = &diskobj->ops;
	46
	47	return EFI_SUCCESS;
	48	}
	49
e275458c	50	static efi_status_t EFIAPI efi_disk_open_dp(void handle, efi_guid_t protocol,
2a22d05d AG	51	void *protocol_interface, void agent_handle,
	52	void *controller_handle, uint32_t attributes)
	53	{
	54	struct efi_disk_obj *diskobj = handle;
	55
	56	*protocol_interface = diskobj->dp;
	57
	58	return EFI_SUCCESS;
	59	}
	60
	61	static efi_status_t EFIAPI efi_disk_reset(struct efi_block_io *this,
	62	char extended_verification)
	63	{
	64	EFI_ENTRY("%p, %x", this, extended_verification);
	65	return EFI_EXIT(EFI_DEVICE_ERROR);
	66	}
	67
	68	enum efi_disk_direction {
	69	EFI_DISK_READ,
	70	EFI_DISK_WRITE,
	71	};
	72
	73	static efi_status_t EFIAPI efi_disk_rw_blocks(struct efi_block_io *this,
	74	u32 media_id, u64 lba, unsigned long buffer_size,
	75	void *buffer, enum efi_disk_direction direction)
	76	{
	77	struct efi_disk_obj *diskobj;
	78	struct blk_desc *desc;
	79	int blksz;
	80	int blocks;
	81	unsigned long n;
	82
2a22d05d	83	diskobj = container_of(this, struct efi_disk_obj, ops);
f9d334bd	84	desc = (struct blk_desc *) diskobj->desc;
2a22d05d AG	85	blksz = desc->blksz;
2a22d05d AG	86	blocks = buffer_size / blksz;
8c3df0bf	87	lba += diskobj->offset;
2a22d05d	88
edcef3ba AG	89	debug("EFI: %s:%d blocks=%x lba=%"PRIx64" blksz=%x dir=%d\n", __func__,
edcef3ba AG	90	__LINE__, blocks, lba, blksz, direction);
2a22d05d AG	91
	92	/* We only support full block access */
	93	if (buffer_size & (blksz - 1))
	94	return EFI_EXIT(EFI_DEVICE_ERROR);
	95
	96	if (direction == EFI_DISK_READ)
487d756f	97	n = blk_dread(desc, lba, blocks, buffer);
2a22d05d	98	else
487d756f	99	n = blk_dwrite(desc, lba, blocks, buffer);
2a22d05d AG	100
	101	/* We don't do interrupts, so check for timers cooperatively */
	102	efi_timer_check();
	103
edcef3ba AG	104	debug("EFI: %s:%d n=%lx blocks=%x\n", __func__, __LINE__, n, blocks);
edcef3ba AG	105
2a22d05d AG	106	if (n != blocks)
	107	return EFI_EXIT(EFI_DEVICE_ERROR);
	108
	109	return EFI_EXIT(EFI_SUCCESS);
	110	}
	111
e275458c	112	static efi_status_t EFIAPI efi_disk_read_blocks(struct efi_block_io *this,
2a22d05d AG	113	u32 media_id, u64 lba, unsigned long buffer_size,
	114	void *buffer)
	115	{
51735ae0 AG	116	void *real_buffer = buffer;
	117	efi_status_t r;
	118
	119	#ifdef CONFIG_EFI_LOADER_BOUNCE_BUFFER
	120	if (buffer_size > EFI_LOADER_BOUNCE_BUFFER_SIZE) {
	121	r = efi_disk_read_blocks(this, media_id, lba,
	122	EFI_LOADER_BOUNCE_BUFFER_SIZE, buffer);
	123	if (r != EFI_SUCCESS)
	124	return r;
	125	return efi_disk_read_blocks(this, media_id, lba +
	126	EFI_LOADER_BOUNCE_BUFFER_SIZE / this->media->block_size,
	127	buffer_size - EFI_LOADER_BOUNCE_BUFFER_SIZE,
	128	buffer + EFI_LOADER_BOUNCE_BUFFER_SIZE);
	129	}
	130
	131	real_buffer = efi_bounce_buffer;
	132	#endif
	133
	134	EFI_ENTRY("%p, %x, %"PRIx64", %lx, %p", this, media_id, lba,
	135	buffer_size, buffer);
	136
	137	r = efi_disk_rw_blocks(this, media_id, lba, buffer_size, real_buffer,
	138	EFI_DISK_READ);
	139
	140	/* Copy from bounce buffer to real buffer if necessary */
	141	if ((r == EFI_SUCCESS) && (real_buffer != buffer))
	142	memcpy(buffer, real_buffer, buffer_size);
	143
	144	return EFI_EXIT(r);
2a22d05d AG	145	}
2a22d05d AG	146
e275458c	147	static efi_status_t EFIAPI efi_disk_write_blocks(struct efi_block_io *this,
2a22d05d AG	148	u32 media_id, u64 lba, unsigned long buffer_size,
	149	void *buffer)
	150	{
51735ae0 AG	151	void *real_buffer = buffer;
	152	efi_status_t r;
	153
	154	#ifdef CONFIG_EFI_LOADER_BOUNCE_BUFFER
	155	if (buffer_size > EFI_LOADER_BOUNCE_BUFFER_SIZE) {
	156	r = efi_disk_write_blocks(this, media_id, lba,
	157	EFI_LOADER_BOUNCE_BUFFER_SIZE, buffer);
	158	if (r != EFI_SUCCESS)
	159	return r;
	160	return efi_disk_write_blocks(this, media_id, lba +
	161	EFI_LOADER_BOUNCE_BUFFER_SIZE / this->media->block_size,
	162	buffer_size - EFI_LOADER_BOUNCE_BUFFER_SIZE,
	163	buffer + EFI_LOADER_BOUNCE_BUFFER_SIZE);
	164	}
	165
	166	real_buffer = efi_bounce_buffer;
	167	#endif
	168
	169	EFI_ENTRY("%p, %x, %"PRIx64", %lx, %p", this, media_id, lba,
	170	buffer_size, buffer);
	171
	172	/* Populate bounce buffer if necessary */
	173	if (real_buffer != buffer)
	174	memcpy(real_buffer, buffer, buffer_size);
	175
	176	r = efi_disk_rw_blocks(this, media_id, lba, buffer_size, real_buffer,
	177	EFI_DISK_WRITE);
	178
	179	return EFI_EXIT(r);
2a22d05d AG	180	}
	181
	182	static efi_status_t EFIAPI efi_disk_flush_blocks(struct efi_block_io *this)
	183	{
	184	/* We always write synchronously */
	185	EFI_ENTRY("%p", this);
	186	return EFI_EXIT(EFI_SUCCESS);
	187	}
	188
	189	static const struct efi_block_io block_io_disk_template = {
	190	.reset = &efi_disk_reset,
	191	.read_blocks = &efi_disk_read_blocks,
	192	.write_blocks = &efi_disk_write_blocks,
	193	.flush_blocks = &efi_disk_flush_blocks,
	194	};
	195
487d756f SG	196	static void efi_disk_add_dev(const char *name,
487d756f SG	197	const char *if_typename,
4a12a97c AG	198	const struct blk_desc *desc,
	199	int dev_index,
	200	lbaint_t offset)
	201	{
	202	struct efi_disk_obj *diskobj;
	203	struct efi_device_path_file_path *dp;
	204	int objlen = sizeof(diskobj) + (sizeof(dp) * 2);
	205
0812d1a0 AG	206	/* Don't add empty devices */
	207	if (!desc->lba)
	208	return;
	209
4a12a97c AG	210	diskobj = calloc(1, objlen);
	211
	212	/* Fill in object data */
	213	diskobj->parent.protocols[0].guid = &efi_block_io_guid;
	214	diskobj->parent.protocols[0].open = efi_disk_open_block;
	215	diskobj->parent.protocols[1].guid = &efi_guid_device_path;
	216	diskobj->parent.protocols[1].open = efi_disk_open_dp;
	217	diskobj->parent.handle = diskobj;
	218	diskobj->ops = block_io_disk_template;
487d756f	219	diskobj->ifname = if_typename;
4a12a97c	220	diskobj->dev_index = dev_index;
8c3df0bf	221	diskobj->offset = offset;
f9d334bd	222	diskobj->desc = desc;
4a12a97c AG	223
	224	/* Fill in EFI IO Media info (for read/write callbacks) */
	225	diskobj->media.removable_media = desc->removable;
	226	diskobj->media.media_present = 1;
	227	diskobj->media.block_size = desc->blksz;
	228	diskobj->media.io_align = desc->blksz;
0812d1a0	229	diskobj->media.last_block = desc->lba - offset;
4a12a97c AG	230	diskobj->ops.media = &diskobj->media;
	231
	232	/* Fill in device path */
	233	dp = (void*)&diskobj[1];
	234	diskobj->dp = dp;
	235	dp[0].dp.type = DEVICE_PATH_TYPE_MEDIA_DEVICE;
	236	dp[0].dp.sub_type = DEVICE_PATH_SUB_TYPE_FILE_PATH;
	237	dp[0].dp.length = sizeof(*dp);
	238	ascii2unicode(dp[0].str, name);
	239
	240	dp[1].dp.type = DEVICE_PATH_TYPE_END;
	241	dp[1].dp.sub_type = DEVICE_PATH_SUB_TYPE_END;
	242	dp[1].dp.length = sizeof(*dp);
	243
	244	/* Hook up to the device list */
	245	list_add_tail(&diskobj->parent.link, &efi_obj_list);
	246	}
	247
8c3df0bf	248	static int efi_disk_create_eltorito(struct blk_desc *desc,
487d756f	249	const char *if_typename,
f9d334bd AG	250	int diskid,
f9d334bd AG	251	const char *pdevname)
8c3df0bf AG	252	{
8c3df0bf AG	253	int disks = 0;
1acc0087	254	#if CONFIG_IS_ENABLED(ISO_PARTITION)
ecbe1a07	255	char devname[32] = { 0 }; /* dp->str is u16[32] long */
8c3df0bf AG	256	disk_partition_t info;
	257	int part = 1;
	258
	259	if (desc->part_type != PART_TYPE_ISO)
	260	return 0;
	261
	262	while (!part_get_info(desc, part, &info)) {
f9d334bd AG	263	snprintf(devname, sizeof(devname), "%s:%d", pdevname,
f9d334bd AG	264	part);
487d756f SG	265	efi_disk_add_dev(devname, if_typename, desc, diskid,
487d756f SG	266	info.start);
8c3df0bf AG	267	part++;
	268	disks++;
	269	}
	270	#endif
	271
	272	return disks;
	273	}
	274
2a22d05d AG	275	/*
	276	* U-Boot doesn't have a list of all online disk devices. So when running our
	277	* EFI payload, we scan through all of the potentially available ones and
	278	* store them in our object pool.
	279	*
487d756f SG	280	* TODO(sjg@chromium.org): Actually with CONFIG_BLK, U-Boot does have this.
	281	* Consider converting the code to look up devices as needed. The EFI device
	282	* could be a child of the UCLASS_BLK block device, perhaps.
	283	*
2a22d05d AG	284	* This gets called from do_bootefi_exec().
	285	*/
	286	int efi_disk_register(void)
	287	{
2a22d05d	288	int disks = 0;
487d756f SG	289	#ifdef CONFIG_BLK
	290	struct udevice *dev;
	291
	292	for (uclass_first_device(UCLASS_BLK, &dev);
	293	dev;
	294	uclass_next_device(&dev)) {
	295	struct blk_desc *desc = dev_get_uclass_platdata(dev);
	296	const char *if_typename = dev->driver->name;
	297
	298	printf("Scanning disk %s...\n", dev->name);
	299	efi_disk_add_dev(dev->name, if_typename, desc, desc->devnum, 0);
	300	disks++;
	301
	302	/*
	303	* El Torito images show up as block devices in an EFI world,
	304	* so let's create them here
	305	*/
	306	disks += efi_disk_create_eltorito(desc, if_typename,
f9d334bd	307	desc->devnum, dev->name);
487d756f SG	308	}
	309	#else
	310	int i, if_type;
2a22d05d AG	311
2a22d05d AG	312	/* Search for all available disk devices */
6dd9faf8	313	for (if_type = 0; if_type < IF_TYPE_COUNT; if_type++) {
487d756f SG	314	const struct blk_driver *cur_drvr;
	315	const char *if_typename;
	316
6dd9faf8 SG	317	cur_drvr = blk_driver_lookup_type(if_type);
	318	if (!cur_drvr)
	319	continue;
	320
487d756f SG	321	if_typename = cur_drvr->if_typename;
487d756f SG	322	printf("Scanning disks on %s...\n", if_typename);
2a22d05d AG	323	for (i = 0; i < 4; i++) {
2a22d05d AG	324	struct blk_desc *desc;
ecbe1a07	325	char devname[32] = { 0 }; /* dp->str is u16[32] long */
2a22d05d	326
6dd9faf8	327	desc = blk_get_devnum_by_type(if_type, i);
2a22d05d AG	328	if (!desc)
	329	continue;
	330	if (desc->type == DEV_TYPE_UNKNOWN)
	331	continue;
	332
2a22d05d	333	snprintf(devname, sizeof(devname), "%s%d",
487d756f SG	334	if_typename, i);
487d756f SG	335	efi_disk_add_dev(devname, if_typename, desc, i, 0);
2a22d05d	336	disks++;
8c3df0bf AG	337
	338	/*
	339	* El Torito images show up as block devices
	340	* in an EFI world, so let's create them here
	341	*/
f9d334bd AG	342	disks += efi_disk_create_eltorito(desc, if_typename,
f9d334bd AG	343	i, devname);
2a22d05d AG	344	}
2a22d05d AG	345	}
487d756f	346	#endif
2a22d05d AG	347	printf("Found %d disks\n", disks);
	348
	349	return 0;
	350	}