[J-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;
};

static efi_status_t 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 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);
	if (!(desc = blk_get_dev(diskobj->ifname, diskobj->dev_index)))
		return EFI_EXIT(EFI_DEVICE_ERROR);
	blksz = desc->blksz;
	blocks = buffer_size / blksz;
	lba += diskobj->offset;

#ifdef DEBUG_EFI
	printf("EFI: %s:%d blocks=%x lba=%"PRIx64" blksz=%x dir=%d\n", __func__,
	       __LINE__, blocks, lba, blksz, direction);
#endif

	/* 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();

#ifdef DEBUG_EFI
	printf("EFI: %s:%d n=%lx blocks=%x\n", __func__, __LINE__, n, blocks);
#endif
	if (n != blocks)
		return EFI_EXIT(EFI_DEVICE_ERROR);

	return EFI_EXIT(EFI_SUCCESS);
}

static efi_status_t 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 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);

	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;

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