[people/ms/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 *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;
};

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 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_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_DEVICE_ERROR;

	return 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,
};

/*
 * 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.
 */
struct efi_simple_file_system_protocol *
efi_fs_from_path(struct efi_device_path *fp)
{
	struct efi_object *efiobj;
	struct efi_disk_obj *diskobj;

	efiobj = efi_dp_find_obj(fp, NULL);
	if (!efiobj)
		return NULL;

	diskobj = container_of(efiobj, struct efi_disk_obj, parent);

	return diskobj->volume;
}

/*
 * Create a device for a 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
 */
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)
{
	struct efi_disk_obj *diskobj;
	efi_status_t ret;

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

	diskobj = calloc(1, sizeof(*diskobj));
	if (!diskobj)
		goto out_of_memory;

	/* Hook up to the device list */
	efi_add_handle(&diskobj->parent);

	/* Fill in object data */
	diskobj->dp = efi_dp_from_part(desc, part);
	diskobj->part = part;
	ret = efi_add_protocol(diskobj->parent.handle, &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,
			       diskobj->dp);
	if (ret != EFI_SUCCESS)
		goto out_of_memory;
	if (part >= 1) {
		diskobj->volume = efi_simple_file_system(desc, part,
							 diskobj->dp);
		ret = efi_add_protocol(diskobj->parent.handle,
				       &efi_simple_file_system_protocol_guid,
				       &diskobj->volume);
		if (ret != EFI_SUCCESS)
			goto out_of_memory;
	}
	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;
	return;
out_of_memory:
	printf("ERROR: Out of memory\n");
}

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;

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

	/* and 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);
		disks++;
	}

	/* ... and add block device: */
	efi_disk_add_dev(devname, if_typename, desc, diskid, 0, 0);
#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_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;

		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);
		}

		/* ... 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);
	}
#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 */
			disk_partition_t info;
			int part;

			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);

			/* 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);
			}

			/* ... 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);
		}
	}
#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 */
884bcf6f RC	31	struct efi_device_path *dp;
	32	/* partition # */
	33	unsigned int part;
2a92080d RC	34	/* handle to filesys proto (for partition objects) */
2a92080d RC	35	struct efi_simple_file_system_protocol *volume;
8c3df0bf AG	36	/* Offset into disk for simple partitions */
8c3df0bf AG	37	lbaint_t offset;
f9d334bd	38	/* Internal block device */
884bcf6f	39	struct blk_desc *desc;
2a22d05d AG	40	};
2a22d05d AG	41
2a22d05d AG	42	static efi_status_t EFIAPI efi_disk_reset(struct efi_block_io *this,
	43	char extended_verification)
	44	{
	45	EFI_ENTRY("%p, %x", this, extended_verification);
	46	return EFI_EXIT(EFI_DEVICE_ERROR);
	47	}
	48
	49	enum efi_disk_direction {
	50	EFI_DISK_READ,
	51	EFI_DISK_WRITE,
	52	};
	53
a80a232e	54	static efi_status_t efi_disk_rw_blocks(struct efi_block_io *this,
2a22d05d AG	55	u32 media_id, u64 lba, unsigned long buffer_size,
	56	void *buffer, enum efi_disk_direction direction)
	57	{
	58	struct efi_disk_obj *diskobj;
	59	struct blk_desc *desc;
	60	int blksz;
	61	int blocks;
	62	unsigned long n;
	63
2a22d05d	64	diskobj = container_of(this, struct efi_disk_obj, ops);
f9d334bd	65	desc = (struct blk_desc *) diskobj->desc;
2a22d05d AG	66	blksz = desc->blksz;
2a22d05d AG	67	blocks = buffer_size / blksz;
8c3df0bf	68	lba += diskobj->offset;
2a22d05d	69
edcef3ba AG	70	debug("EFI: %s:%d blocks=%x lba=%"PRIx64" blksz=%x dir=%d\n", __func__,
edcef3ba AG	71	__LINE__, blocks, lba, blksz, direction);
2a22d05d AG	72
	73	/* We only support full block access */
	74	if (buffer_size & (blksz - 1))
3304990b	75	return EFI_DEVICE_ERROR;
2a22d05d AG	76
2a22d05d AG	77	if (direction == EFI_DISK_READ)
487d756f	78	n = blk_dread(desc, lba, blocks, buffer);
2a22d05d	79	else
487d756f	80	n = blk_dwrite(desc, lba, blocks, buffer);
2a22d05d AG	81
	82	/* We don't do interrupts, so check for timers cooperatively */
	83	efi_timer_check();
	84
edcef3ba AG	85	debug("EFI: %s:%d n=%lx blocks=%x\n", __func__, __LINE__, n, blocks);
edcef3ba AG	86
2a22d05d	87	if (n != blocks)
3304990b	88	return EFI_DEVICE_ERROR;
2a22d05d	89
3304990b	90	return EFI_SUCCESS;
2a22d05d AG	91	}
2a22d05d AG	92
e275458c	93	static efi_status_t EFIAPI efi_disk_read_blocks(struct efi_block_io *this,
2a22d05d AG	94	u32 media_id, u64 lba, unsigned long buffer_size,
	95	void *buffer)
	96	{
51735ae0 AG	97	void *real_buffer = buffer;
	98	efi_status_t r;
	99
	100	#ifdef CONFIG_EFI_LOADER_BOUNCE_BUFFER
	101	if (buffer_size > EFI_LOADER_BOUNCE_BUFFER_SIZE) {
	102	r = efi_disk_read_blocks(this, media_id, lba,
	103	EFI_LOADER_BOUNCE_BUFFER_SIZE, buffer);
	104	if (r != EFI_SUCCESS)
	105	return r;
	106	return efi_disk_read_blocks(this, media_id, lba +
	107	EFI_LOADER_BOUNCE_BUFFER_SIZE / this->media->block_size,
	108	buffer_size - EFI_LOADER_BOUNCE_BUFFER_SIZE,
	109	buffer + EFI_LOADER_BOUNCE_BUFFER_SIZE);
	110	}
	111
	112	real_buffer = efi_bounce_buffer;
	113	#endif
	114
	115	EFI_ENTRY("%p, %x, %"PRIx64", %lx, %p", this, media_id, lba,
	116	buffer_size, buffer);
	117
	118	r = efi_disk_rw_blocks(this, media_id, lba, buffer_size, real_buffer,
	119	EFI_DISK_READ);
	120
	121	/* Copy from bounce buffer to real buffer if necessary */
	122	if ((r == EFI_SUCCESS) && (real_buffer != buffer))
	123	memcpy(buffer, real_buffer, buffer_size);
	124
	125	return EFI_EXIT(r);
2a22d05d AG	126	}
2a22d05d AG	127
e275458c	128	static efi_status_t EFIAPI efi_disk_write_blocks(struct efi_block_io *this,
2a22d05d AG	129	u32 media_id, u64 lba, unsigned long buffer_size,
	130	void *buffer)
	131	{
51735ae0 AG	132	void *real_buffer = buffer;
	133	efi_status_t r;
	134
	135	#ifdef CONFIG_EFI_LOADER_BOUNCE_BUFFER
	136	if (buffer_size > EFI_LOADER_BOUNCE_BUFFER_SIZE) {
	137	r = efi_disk_write_blocks(this, media_id, lba,
	138	EFI_LOADER_BOUNCE_BUFFER_SIZE, buffer);
	139	if (r != EFI_SUCCESS)
	140	return r;
	141	return efi_disk_write_blocks(this, media_id, lba +
	142	EFI_LOADER_BOUNCE_BUFFER_SIZE / this->media->block_size,
	143	buffer_size - EFI_LOADER_BOUNCE_BUFFER_SIZE,
	144	buffer + EFI_LOADER_BOUNCE_BUFFER_SIZE);
	145	}
	146
	147	real_buffer = efi_bounce_buffer;
	148	#endif
	149
	150	EFI_ENTRY("%p, %x, %"PRIx64", %lx, %p", this, media_id, lba,
	151	buffer_size, buffer);
	152
	153	/* Populate bounce buffer if necessary */
	154	if (real_buffer != buffer)
	155	memcpy(real_buffer, buffer, buffer_size);
	156
	157	r = efi_disk_rw_blocks(this, media_id, lba, buffer_size, real_buffer,
	158	EFI_DISK_WRITE);
	159
	160	return EFI_EXIT(r);
2a22d05d AG	161	}
	162
	163	static efi_status_t EFIAPI efi_disk_flush_blocks(struct efi_block_io *this)
	164	{
	165	/* We always write synchronously */
	166	EFI_ENTRY("%p", this);
	167	return EFI_EXIT(EFI_SUCCESS);
	168	}
	169
	170	static const struct efi_block_io block_io_disk_template = {
	171	.reset = &efi_disk_reset,
	172	.read_blocks = &efi_disk_read_blocks,
	173	.write_blocks = &efi_disk_write_blocks,
	174	.flush_blocks = &efi_disk_flush_blocks,
	175	};
	176
2a92080d RC	177	/*
	178	* Find filesystem from a device-path. The passed in path 'p' probably
	179	* contains one or more /File(name) nodes, so the comparison stops at
	180	* the first /File() node, and returns the pointer to that via 'rp'.
	181	* This is mostly intended to be a helper to map a device-path to an
	182	* efi_file_handle object.
	183	*/
	184	struct efi_simple_file_system_protocol *
	185	efi_fs_from_path(struct efi_device_path *fp)
	186	{
	187	struct efi_object *efiobj;
	188	struct efi_disk_obj *diskobj;
	189
	190	efiobj = efi_dp_find_obj(fp, NULL);
	191	if (!efiobj)
	192	return NULL;
	193
	194	diskobj = container_of(efiobj, struct efi_disk_obj, parent);
	195
	196	return diskobj->volume;
	197	}
	198
93945f2c HS	199	/*
	200	* Create a device for a disk
	201	*
	202	* @name not used
	203	* @if_typename interface name for block device
	204	* @desc internal block device
	205	* @dev_index device index for block device
	206	* @offset offset into disk for simple partitions
	207	*/
487d756f SG	208	static void efi_disk_add_dev(const char *name,
487d756f SG	209	const char *if_typename,
884bcf6f	210	struct blk_desc *desc,
4a12a97c	211	int dev_index,
884bcf6f RC	212	lbaint_t offset,
884bcf6f RC	213	unsigned int part)
4a12a97c AG	214	{
4a12a97c AG	215	struct efi_disk_obj *diskobj;
4b9f7aaf	216	efi_status_t ret;
4a12a97c	217
0812d1a0 AG	218	/* Don't add empty devices */
	219	if (!desc->lba)
	220	return;
	221
884bcf6f	222	diskobj = calloc(1, sizeof(*diskobj));
4b9f7aaf HS	223	if (!diskobj)
	224	goto out_of_memory;
	225
	226	/* Hook up to the device list */
44549d62	227	efi_add_handle(&diskobj->parent);
4a12a97c AG	228
4a12a97c AG	229	/* Fill in object data */
884bcf6f RC	230	diskobj->dp = efi_dp_from_part(desc, part);
884bcf6f RC	231	diskobj->part = part;
4b9f7aaf HS	232	ret = efi_add_protocol(diskobj->parent.handle, &efi_block_io_guid,
	233	&diskobj->ops);
	234	if (ret != EFI_SUCCESS)
	235	goto out_of_memory;
	236	ret = efi_add_protocol(diskobj->parent.handle, &efi_guid_device_path,
	237	diskobj->dp);
	238	if (ret != EFI_SUCCESS)
	239	goto out_of_memory;
2a92080d RC	240	if (part >= 1) {
	241	diskobj->volume = efi_simple_file_system(desc, part,
	242	diskobj->dp);
4b9f7aaf HS	243	ret = efi_add_protocol(diskobj->parent.handle,
	244	&efi_simple_file_system_protocol_guid,
	245	&diskobj->volume);
	246	if (ret != EFI_SUCCESS)
	247	goto out_of_memory;
2a92080d	248	}
4a12a97c	249	diskobj->ops = block_io_disk_template;
487d756f	250	diskobj->ifname = if_typename;
4a12a97c	251	diskobj->dev_index = dev_index;
8c3df0bf	252	diskobj->offset = offset;
f9d334bd	253	diskobj->desc = desc;
4a12a97c AG	254
	255	/* Fill in EFI IO Media info (for read/write callbacks) */
	256	diskobj->media.removable_media = desc->removable;
	257	diskobj->media.media_present = 1;
	258	diskobj->media.block_size = desc->blksz;
	259	diskobj->media.io_align = desc->blksz;
0812d1a0	260	diskobj->media.last_block = desc->lba - offset;
4a12a97c	261	diskobj->ops.media = &diskobj->media;
4b9f7aaf HS	262	return;
	263	out_of_memory:
	264	printf("ERROR: Out of memory\n");
4a12a97c AG	265	}
4a12a97c AG	266
8c3df0bf	267	static int efi_disk_create_eltorito(struct blk_desc *desc,
487d756f	268	const char *if_typename,
f9d334bd AG	269	int diskid,
f9d334bd AG	270	const char *pdevname)
8c3df0bf AG	271	{
8c3df0bf AG	272	int disks = 0;
1acc0087	273	#if CONFIG_IS_ENABLED(ISO_PARTITION)
ecbe1a07	274	char devname[32] = { 0 }; /* dp->str is u16[32] long */
8c3df0bf	275	disk_partition_t info;
16a73b24	276	int part;
8c3df0bf AG	277
	278	if (desc->part_type != PART_TYPE_ISO)
	279	return 0;
	280
884bcf6f	281	/* and devices for each partition: */
16a73b24 JG	282	for (part = 1; part <= MAX_SEARCH_PARTITIONS; part++) {
	283	if (part_get_info(desc, part, &info))
	284	continue;
f9d334bd AG	285	snprintf(devname, sizeof(devname), "%s:%d", pdevname,
f9d334bd AG	286	part);
487d756f	287	efi_disk_add_dev(devname, if_typename, desc, diskid,
884bcf6f	288	info.start, part);
8c3df0bf AG	289	disks++;
8c3df0bf AG	290	}
884bcf6f RC	291
	292	/* ... and add block device: */
	293	efi_disk_add_dev(devname, if_typename, desc, diskid, 0, 0);
8c3df0bf AG	294	#endif
	295
	296	return disks;
	297	}
	298
2a22d05d AG	299	/*
	300	* U-Boot doesn't have a list of all online disk devices. So when running our
	301	* EFI payload, we scan through all of the potentially available ones and
	302	* store them in our object pool.
	303	*
487d756f SG	304	* TODO(sjg@chromium.org): Actually with CONFIG_BLK, U-Boot does have this.
	305	* Consider converting the code to look up devices as needed. The EFI device
	306	* could be a child of the UCLASS_BLK block device, perhaps.
	307	*
2a22d05d AG	308	* This gets called from do_bootefi_exec().
	309	*/
	310	int efi_disk_register(void)
	311	{
2a22d05d	312	int disks = 0;
487d756f SG	313	#ifdef CONFIG_BLK
	314	struct udevice *dev;
	315
70bfcdc6	316	for (uclass_first_device_check(UCLASS_BLK, &dev);
487d756f	317	dev;
70bfcdc6	318	uclass_next_device_check(&dev)) {
487d756f SG	319	struct blk_desc *desc = dev_get_uclass_platdata(dev);
487d756f SG	320	const char *if_typename = dev->driver->name;
884bcf6f	321	disk_partition_t info;
16a73b24	322	int part;
487d756f SG	323
487d756f SG	324	printf("Scanning disk %s...\n", dev->name);
884bcf6f RC	325
884bcf6f RC	326	/* add devices for each partition: */
16a73b24 JG	327	for (part = 1; part <= MAX_SEARCH_PARTITIONS; part++) {
	328	if (part_get_info(desc, part, &info))
	329	continue;
884bcf6f RC	330	efi_disk_add_dev(dev->name, if_typename, desc,
884bcf6f RC	331	desc->devnum, 0, part);
884bcf6f RC	332	}
	333
	334	/* ... and add block device: */
	335	efi_disk_add_dev(dev->name, if_typename, desc,
	336	desc->devnum, 0, 0);
	337
487d756f SG	338	disks++;
	339
	340	/*
	341	* El Torito images show up as block devices in an EFI world,
	342	* so let's create them here
	343	*/
	344	disks += efi_disk_create_eltorito(desc, if_typename,
f9d334bd	345	desc->devnum, dev->name);
487d756f SG	346	}
	347	#else
	348	int i, if_type;
2a22d05d AG	349
2a22d05d AG	350	/* Search for all available disk devices */
6dd9faf8	351	for (if_type = 0; if_type < IF_TYPE_COUNT; if_type++) {
487d756f SG	352	const struct blk_driver *cur_drvr;
	353	const char *if_typename;
	354
6dd9faf8 SG	355	cur_drvr = blk_driver_lookup_type(if_type);
	356	if (!cur_drvr)
	357	continue;
	358
487d756f SG	359	if_typename = cur_drvr->if_typename;
487d756f SG	360	printf("Scanning disks on %s...\n", if_typename);
2a22d05d AG	361	for (i = 0; i < 4; i++) {
2a22d05d AG	362	struct blk_desc *desc;
ecbe1a07	363	char devname[32] = { 0 }; /* dp->str is u16[32] long */
77511b3b	364	disk_partition_t info;
16a73b24	365	int part;
2a22d05d	366
6dd9faf8	367	desc = blk_get_devnum_by_type(if_type, i);
2a22d05d AG	368	if (!desc)
	369	continue;
	370	if (desc->type == DEV_TYPE_UNKNOWN)
	371	continue;
	372
2a22d05d	373	snprintf(devname, sizeof(devname), "%s%d",
487d756f	374	if_typename, i);
77511b3b RC	375
77511b3b RC	376	/* add devices for each partition: */
16a73b24 JG	377	for (part = 1; part <= MAX_SEARCH_PARTITIONS; part++) {
	378	if (part_get_info(desc, part, &info))
	379	continue;
77511b3b RC	380	efi_disk_add_dev(devname, if_typename, desc,
77511b3b RC	381	i, 0, part);
77511b3b RC	382	}
	383
	384	/* ... and add block device: */
884bcf6f	385	efi_disk_add_dev(devname, if_typename, desc, i, 0, 0);
2a22d05d	386	disks++;
8c3df0bf AG	387
	388	/*
	389	* El Torito images show up as block devices
	390	* in an EFI world, so let's create them here
	391	*/
f9d334bd AG	392	disks += efi_disk_create_eltorito(desc, if_typename,
f9d334bd AG	393	i, devname);
2a22d05d AG	394	}
2a22d05d AG	395	}
487d756f	396	#endif
2a22d05d AG	397	printf("Found %d disks\n", disks);
	398
	399	return 0;
	400	}