[J-u-boot.git] / boot / bootmeth-uclass.c

// SPDX-License-Identifier: GPL-2.0+
/*
 * Copyright 2021 Google LLC
 * Written by Simon Glass <[email protected]>
 */

#define LOG_CATEGORY UCLASS_BOOTSTD

#include <blk.h>
#include <bootflow.h>
#include <bootmeth.h>
#include <bootstd.h>
#include <dm.h>
#include <env_internal.h>
#include <fs.h>
#include <malloc.h>
#include <mapmem.h>
#include <dm/uclass-internal.h>

DECLARE_GLOBAL_DATA_PTR;

int bootmeth_get_state_desc(struct udevice *dev, char *buf, int maxsize)
{
	const struct bootmeth_ops *ops = bootmeth_get_ops(dev);

	if (!ops->get_state_desc)
		return -ENOSYS;

	return ops->get_state_desc(dev, buf, maxsize);
}

int bootmeth_check(struct udevice *dev, struct bootflow_iter *iter)
{
	const struct bootmeth_ops *ops = bootmeth_get_ops(dev);

	if (!ops->check)
		return 0;

	return ops->check(dev, iter);
}

int bootmeth_read_bootflow(struct udevice *dev, struct bootflow *bflow)
{
	const struct bootmeth_ops *ops = bootmeth_get_ops(dev);

	if (!ops->read_bootflow)
		return -ENOSYS;

	return ops->read_bootflow(dev, bflow);
}

int bootmeth_set_bootflow(struct udevice *dev, struct bootflow *bflow,
			  char *buf, int size)
{
	const struct bootmeth_ops *ops = bootmeth_get_ops(dev);

	if (!ops->set_bootflow)
		return -ENOSYS;

	return ops->set_bootflow(dev, bflow, buf, size);
}

#if CONFIG_IS_ENABLED(BOOTSTD_FULL)
int bootmeth_read_all(struct udevice *dev, struct bootflow *bflow)
{
	const struct bootmeth_ops *ops = bootmeth_get_ops(dev);

	if (!ops->read_all)
		return -ENOSYS;

	return ops->read_all(dev, bflow);
}
#endif /* BOOTSTD_FULL */

int bootmeth_boot(struct udevice *dev, struct bootflow *bflow)
{
	const struct bootmeth_ops *ops = bootmeth_get_ops(dev);

	if (!ops->boot)
		return -ENOSYS;

	return ops->boot(dev, bflow);
}

int bootmeth_read_file(struct udevice *dev, struct bootflow *bflow,
		       const char *file_path, ulong addr, ulong *sizep)
{
	const struct bootmeth_ops *ops = bootmeth_get_ops(dev);

	if (!ops->read_file)
		return -ENOSYS;

	return ops->read_file(dev, bflow, file_path, addr, sizep);
}

int bootmeth_get_bootflow(struct udevice *dev, struct bootflow *bflow)
{
	const struct bootmeth_ops *ops = bootmeth_get_ops(dev);

	if (!ops->read_bootflow)
		return -ENOSYS;
	bootflow_init(bflow, NULL, dev);

	return ops->read_bootflow(dev, bflow);
}

int bootmeth_setup_iter_order(struct bootflow_iter *iter, bool include_global)
{
	struct bootstd_priv *std;
	struct udevice **order;
	int count;
	int ret;

	ret = bootstd_get_priv(&std);
	if (ret)
		return ret;

	/* Create an array large enough */
	count = std->bootmeth_count ? std->bootmeth_count :
		uclass_id_count(UCLASS_BOOTMETH);
	if (!count)
		return log_msg_ret("count", -ENOENT);

	order = calloc(count, sizeof(struct udevice *));
	if (!order)
		return log_msg_ret("order", -ENOMEM);

	/* If we have an ordering, copy it */
	if (IS_ENABLED(CONFIG_BOOTSTD_FULL) && std->bootmeth_count) {
		int i;

		/*
		 * We don't support skipping global bootmeths. Instead, the user
		 * should omit them from the ordering
		 */
		if (!include_global)
			return log_msg_ret("glob", -EPERM);
		memcpy(order, std->bootmeth_order,
		       count * sizeof(struct bootmeth *));

		if (IS_ENABLED(CONFIG_BOOTMETH_GLOBAL)) {
			for (i = 0; i < count; i++) {
				struct udevice *dev = order[i];
				struct bootmeth_uc_plat *ucp;
				bool is_global;

				ucp = dev_get_uclass_plat(dev);
				is_global = ucp->flags &
					BOOTMETHF_GLOBAL;
				if (is_global) {
					iter->first_glob_method = i;
					break;
				}
			}
		}
	} else {
		struct udevice *dev;
		int i, upto, pass;

		/*
		 * Do two passes, one to find the normal bootmeths and another
		 * to find the global ones, if required, The global ones go at
		 * the end.
		 */
		for (pass = 0, upto = 0; pass < 1 + include_global; pass++) {
			if (pass)
				iter->first_glob_method = upto;
			/*
			 * Get a list of bootmethods, in seq order (i.e. using
			 * aliases). There may be gaps so try to count up high
			 * enough to find them all.
			 */
			for (i = 0; upto < count && i < 20 + count * 2; i++) {
				struct bootmeth_uc_plat *ucp;
				bool is_global;

				ret = uclass_get_device_by_seq(UCLASS_BOOTMETH,
							       i, &dev);
				if (ret)
					continue;
				ucp = dev_get_uclass_plat(dev);
				is_global =
					IS_ENABLED(CONFIG_BOOTMETH_GLOBAL) &&
					(ucp->flags & BOOTMETHF_GLOBAL);
				if (pass ? is_global : !is_global)
					order[upto++] = dev;
			}
		}
		count = upto;
	}
	if (!count)
		return log_msg_ret("count2", -ENOENT);

	if (IS_ENABLED(CONFIG_BOOTMETH_GLOBAL) && include_global &&
	    iter->first_glob_method != -1 && iter->first_glob_method != count) {
		iter->cur_method = iter->first_glob_method;
		iter->doing_global = true;
	}
	iter->method_order = order;
	iter->num_methods = count;

	return 0;
}

int bootmeth_set_order(const char *order_str)
{
	struct bootstd_priv *std;
	struct udevice **order;
	int count, ret, i, len;
	const char *s, *p;

	ret = bootstd_get_priv(&std);
	if (ret)
		return ret;

	if (!order_str) {
		free(std->bootmeth_order);
		std->bootmeth_order = NULL;
		std->bootmeth_count = 0;
		return 0;
	}

	/* Create an array large enough */
	count = uclass_id_count(UCLASS_BOOTMETH);
	if (!count)
		return log_msg_ret("count", -ENOENT);

	order = calloc(count + 1, sizeof(struct udevice *));
	if (!order)
		return log_msg_ret("order", -ENOMEM);

	for (i = 0, s = order_str; *s && i < count; s = p + (*p == ' '), i++) {
		struct udevice *dev;

		p = strchrnul(s, ' ');
		len = p - s;
		ret = uclass_find_device_by_namelen(UCLASS_BOOTMETH, s, len,
						    &dev);
		if (ret) {
			printf("Unknown bootmeth '%.*s'\n", len, s);
			free(order);
			return ret;
		}
		order[i] = dev;
	}
	order[i] = NULL;
	free(std->bootmeth_order);
	std->bootmeth_order = order;
	std->bootmeth_count = i;

	return 0;
}

int bootmeth_setup_fs(struct bootflow *bflow, struct blk_desc *desc)
{
	int ret;

	if (desc) {
		ret = fs_set_blk_dev_with_part(desc, bflow->part);
		if (ret)
			return log_msg_ret("set", ret);
	} else if (IS_ENABLED(CONFIG_BOOTSTD_FULL) && bflow->fs_type) {
		fs_set_type(bflow->fs_type);
	}

	return 0;
}

int bootmeth_try_file(struct bootflow *bflow, struct blk_desc *desc,
		      const char *prefix, const char *fname)
{
	char path[200];
	loff_t size;
	int ret, ret2;

	snprintf(path, sizeof(path), "%s%s", prefix ? prefix : "", fname);
	log_debug("trying: %s\n", path);

	free(bflow->fname);
	bflow->fname = strdup(path);
	if (!bflow->fname)
		return log_msg_ret("name", -ENOMEM);

	if (IS_ENABLED(CONFIG_BOOTSTD_FULL) && bflow->fs_type)
		fs_set_type(bflow->fs_type);

	ret = fs_size(path, &size);
	log_debug("   %s - err=%d\n", path, ret);

	/* Sadly FS closes the file after fs_size() so we must redo this */
	ret2 = bootmeth_setup_fs(bflow, desc);
	if (ret2)
		return log_msg_ret("fs", ret2);

	if (ret)
		return log_msg_ret("size", ret);

	bflow->size = size;
	bflow->state = BOOTFLOWST_FILE;

	return 0;
}

int bootmeth_alloc_file(struct bootflow *bflow, uint size_limit, uint align)
{
	void *buf;
	uint size;
	int ret;

	size = bflow->size;
	log_debug("   - script file size %x\n", size);
	if (size > size_limit)
		return log_msg_ret("chk", -E2BIG);

	ret = fs_read_alloc(bflow->fname, bflow->size, align, &buf);
	if (ret)
		return log_msg_ret("all", ret);

	bflow->state = BOOTFLOWST_READY;
	bflow->buf = buf;

	return 0;
}

int bootmeth_alloc_other(struct bootflow *bflow, const char *fname,
			 void **bufp, uint *sizep)
{
	struct blk_desc *desc = NULL;
	char path[200];
	loff_t size;
	void *buf;
	int ret;

	snprintf(path, sizeof(path), "%s%s", bflow->subdir, fname);
	log_debug("trying: %s\n", path);

	if (bflow->blk)
		desc = dev_get_uclass_plat(bflow->blk);

	ret = bootmeth_setup_fs(bflow, desc);
	if (ret)
		return log_msg_ret("fs", ret);

	ret = fs_size(path, &size);
	log_debug("   %s - err=%d\n", path, ret);

	ret = bootmeth_setup_fs(bflow, desc);
	if (ret)
		return log_msg_ret("fs", ret);

	ret = fs_read_alloc(path, size, 0, &buf);
	if (ret)
		return log_msg_ret("all", ret);

	*bufp = buf;
	*sizep = size;

	return 0;
}

int bootmeth_common_read_file(struct udevice *dev, struct bootflow *bflow,
			      const char *file_path, ulong addr, ulong *sizep)
{
	struct blk_desc *desc = NULL;
	loff_t len_read;
	loff_t size;
	int ret;

	if (bflow->blk)
		desc = dev_get_uclass_plat(bflow->blk);

	ret = bootmeth_setup_fs(bflow, desc);
	if (ret)
		return log_msg_ret("fs", ret);

	ret = fs_size(file_path, &size);
	if (ret)
		return log_msg_ret("size", ret);
	if (size > *sizep)
		return log_msg_ret("spc", -ENOSPC);

	ret = bootmeth_setup_fs(bflow, desc);
	if (ret)
		return log_msg_ret("fs", ret);

	ret = fs_read(file_path, addr, 0, 0, &len_read);
	if (ret)
		return ret;
	*sizep = len_read;

	return 0;
}

#ifdef CONFIG_BOOTSTD_FULL
/**
 * on_bootmeths() - Update the bootmeth order
 *
 * This will check for a valid list of bootmeths and only apply it if valid.
 */
static int on_bootmeths(const char *name, const char *value, enum env_op op,
			int flags)
{
	int ret;

	switch (op) {
	case env_op_create:
	case env_op_overwrite:
		ret = bootmeth_set_order(value);
		if (ret)
			return 1;
		return 0;
	case env_op_delete:
		bootmeth_set_order(NULL);
		fallthrough;
	default:
		return 0;
	}
}
U_BOOT_ENV_CALLBACK(bootmeths, on_bootmeths);
#endif /* CONFIG_BOOTSTD_FULL */

UCLASS_DRIVER(bootmeth) = {
	.id		= UCLASS_BOOTMETH,
	.name		= "bootmeth",
	.flags		= DM_UC_FLAG_SEQ_ALIAS,
	.per_device_plat_auto	= sizeof(struct bootmeth_uc_plat),
};
Commit	Line	Data
a950d31a SG	1	// SPDX-License-Identifier: GPL-2.0+
	2	/*
	3	* Copyright 2021 Google LLC
	4	* Written by Simon Glass <[email protected]>
	5	*/
	6
	7	#define LOG_CATEGORY UCLASS_BOOTSTD
	8
a950d31a SG	9	#include <blk.h>
	10	#include <bootflow.h>
	11	#include <bootmeth.h>
	12	#include <bootstd.h>
	13	#include <dm.h>
	14	#include <env_internal.h>
	15	#include <fs.h>
	16	#include <malloc.h>
	17	#include <mapmem.h>
	18	#include <dm/uclass-internal.h>
	19
	20	DECLARE_GLOBAL_DATA_PTR;
	21
988cacae SG	22	int bootmeth_get_state_desc(struct udevice dev, char buf, int maxsize)
	23	{
	24	const struct bootmeth_ops *ops = bootmeth_get_ops(dev);
	25
	26	if (!ops->get_state_desc)
	27	return -ENOSYS;
	28
	29	return ops->get_state_desc(dev, buf, maxsize);
	30	}
	31
a950d31a SG	32	int bootmeth_check(struct udevice dev, struct bootflow_iter iter)
	33	{
	34	const struct bootmeth_ops *ops = bootmeth_get_ops(dev);
	35
	36	if (!ops->check)
	37	return 0;
	38
	39	return ops->check(dev, iter);
	40	}
	41
	42	int bootmeth_read_bootflow(struct udevice dev, struct bootflow bflow)
	43	{
	44	const struct bootmeth_ops *ops = bootmeth_get_ops(dev);
	45
	46	if (!ops->read_bootflow)
	47	return -ENOSYS;
	48
	49	return ops->read_bootflow(dev, bflow);
	50	}
	51
22061d3d SG	52	int bootmeth_set_bootflow(struct udevice dev, struct bootflow bflow,
	53	char *buf, int size)
	54	{
	55	const struct bootmeth_ops *ops = bootmeth_get_ops(dev);
	56
	57	if (!ops->set_bootflow)
	58	return -ENOSYS;
	59
	60	return ops->set_bootflow(dev, bflow, buf, size);
	61	}
	62
c279224e SG	63	#if CONFIG_IS_ENABLED(BOOTSTD_FULL)
	64	int bootmeth_read_all(struct udevice dev, struct bootflow bflow)
	65	{
	66	const struct bootmeth_ops *ops = bootmeth_get_ops(dev);
	67
	68	if (!ops->read_all)
	69	return -ENOSYS;
	70
	71	return ops->read_all(dev, bflow);
	72	}
	73	#endif /* BOOTSTD_FULL */
	74
a950d31a SG	75	int bootmeth_boot(struct udevice dev, struct bootflow bflow)
	76	{
	77	const struct bootmeth_ops *ops = bootmeth_get_ops(dev);
	78
	79	if (!ops->boot)
	80	return -ENOSYS;
	81
	82	return ops->boot(dev, bflow);
	83	}
	84
	85	int bootmeth_read_file(struct udevice dev, struct bootflow bflow,
	86	const char file_path, ulong addr, ulong sizep)
	87	{
	88	const struct bootmeth_ops *ops = bootmeth_get_ops(dev);
	89
	90	if (!ops->read_file)
	91	return -ENOSYS;
	92
	93	return ops->read_file(dev, bflow, file_path, addr, sizep);
	94	}
	95
bc06aa03 SG	96	int bootmeth_get_bootflow(struct udevice dev, struct bootflow bflow)
	97	{
	98	const struct bootmeth_ops *ops = bootmeth_get_ops(dev);
	99
	100	if (!ops->read_bootflow)
	101	return -ENOSYS;
b190deb8	102	bootflow_init(bflow, NULL, dev);
bc06aa03 SG	103
	104	return ops->read_bootflow(dev, bflow);
	105	}
	106
c627cfc1	107	int bootmeth_setup_iter_order(struct bootflow_iter *iter, bool include_global)
a950d31a SG	108	{
	109	struct bootstd_priv *std;
	110	struct udevice **order;
	111	int count;
	112	int ret;
	113
	114	ret = bootstd_get_priv(&std);
	115	if (ret)
	116	return ret;
	117
	118	/* Create an array large enough */
	119	count = std->bootmeth_count ? std->bootmeth_count :
	120	uclass_id_count(UCLASS_BOOTMETH);
	121	if (!count)
	122	return log_msg_ret("count", -ENOENT);
	123
	124	order = calloc(count, sizeof(struct udevice *));
	125	if (!order)
	126	return log_msg_ret("order", -ENOMEM);
	127
	128	/* If we have an ordering, copy it */
	129	if (IS_ENABLED(CONFIG_BOOTSTD_FULL) && std->bootmeth_count) {
c627cfc1 SG	130	int i;
	131
	132	/*
	133	* We don't support skipping global bootmeths. Instead, the user
	134	* should omit them from the ordering
	135	*/
	136	if (!include_global)
	137	return log_msg_ret("glob", -EPERM);
a950d31a SG	138	memcpy(order, std->bootmeth_order,
a950d31a SG	139	count * sizeof(struct bootmeth *));
c627cfc1 SG	140
	141	if (IS_ENABLED(CONFIG_BOOTMETH_GLOBAL)) {
	142	for (i = 0; i < count; i++) {
	143	struct udevice *dev = order[i];
	144	struct bootmeth_uc_plat *ucp;
	145	bool is_global;
	146
	147	ucp = dev_get_uclass_plat(dev);
	148	is_global = ucp->flags &
	149	BOOTMETHF_GLOBAL;
	150	if (is_global) {
	151	iter->first_glob_method = i;
	152	break;
	153	}
	154	}
	155	}
a950d31a SG	156	} else {
a950d31a SG	157	struct udevice *dev;
c627cfc1	158	int i, upto, pass;
a950d31a SG	159
a950d31a SG	160	/*
c627cfc1 SG	161	* Do two passes, one to find the normal bootmeths and another
	162	* to find the global ones, if required, The global ones go at
	163	* the end.
a950d31a	164	*/
c627cfc1 SG	165	for (pass = 0, upto = 0; pass < 1 + include_global; pass++) {
	166	if (pass)
	167	iter->first_glob_method = upto;
	168	/*
	169	* Get a list of bootmethods, in seq order (i.e. using
	170	* aliases). There may be gaps so try to count up high
	171	* enough to find them all.
	172	*/
	173	for (i = 0; upto < count && i < 20 + count * 2; i++) {
	174	struct bootmeth_uc_plat *ucp;
	175	bool is_global;
	176
	177	ret = uclass_get_device_by_seq(UCLASS_BOOTMETH,
	178	i, &dev);
	179	if (ret)
	180	continue;
	181	ucp = dev_get_uclass_plat(dev);
	182	is_global =
	183	IS_ENABLED(CONFIG_BOOTMETH_GLOBAL) &&
	184	(ucp->flags & BOOTMETHF_GLOBAL);
	185	if (pass ? is_global : !is_global)
	186	order[upto++] = dev;
	187	}
a950d31a SG	188	}
	189	count = upto;
	190	}
10d16faa SG	191	if (!count)
10d16faa SG	192	return log_msg_ret("count2", -ENOENT);
a950d31a	193
c627cfc1 SG	194	if (IS_ENABLED(CONFIG_BOOTMETH_GLOBAL) && include_global &&
	195	iter->first_glob_method != -1 && iter->first_glob_method != count) {
	196	iter->cur_method = iter->first_glob_method;
	197	iter->doing_global = true;
	198	}
a950d31a SG	199	iter->method_order = order;
a950d31a SG	200	iter->num_methods = count;
a950d31a SG	201
	202	return 0;
	203	}
	204
	205	int bootmeth_set_order(const char *order_str)
	206	{
	207	struct bootstd_priv *std;
	208	struct udevice **order;
	209	int count, ret, i, len;
	210	const char s, p;
	211
	212	ret = bootstd_get_priv(&std);
	213	if (ret)
	214	return ret;
	215
	216	if (!order_str) {
	217	free(std->bootmeth_order);
	218	std->bootmeth_order = NULL;
	219	std->bootmeth_count = 0;
	220	return 0;
	221	}
	222
	223	/* Create an array large enough */
	224	count = uclass_id_count(UCLASS_BOOTMETH);
	225	if (!count)
	226	return log_msg_ret("count", -ENOENT);
	227
	228	order = calloc(count + 1, sizeof(struct udevice *));
	229	if (!order)
	230	return log_msg_ret("order", -ENOMEM);
	231
	232	for (i = 0, s = order_str; s && i < count; s = p + (p == ' '), i++) {
	233	struct udevice *dev;
	234
	235	p = strchrnul(s, ' ');
	236	len = p - s;
	237	ret = uclass_find_device_by_namelen(UCLASS_BOOTMETH, s, len,
	238	&dev);
	239	if (ret) {
	240	printf("Unknown bootmeth '%.*s'\n", len, s);
	241	free(order);
	242	return ret;
	243	}
	244	order[i] = dev;
	245	}
	246	order[i] = NULL;
	247	free(std->bootmeth_order);
	248	std->bootmeth_order = order;
	249	std->bootmeth_count = i;
	250
	251	return 0;
	252	}
	253
0c0c82b5	254	int bootmeth_setup_fs(struct bootflow bflow, struct blk_desc desc)
a950d31a SG	255	{
	256	int ret;
	257
	258	if (desc) {
	259	ret = fs_set_blk_dev_with_part(desc, bflow->part);
	260	if (ret)
	261	return log_msg_ret("set", ret);
	262	} else if (IS_ENABLED(CONFIG_BOOTSTD_FULL) && bflow->fs_type) {
	263	fs_set_type(bflow->fs_type);
	264	}
	265
	266	return 0;
	267	}
	268
	269	int bootmeth_try_file(struct bootflow bflow, struct blk_desc desc,
	270	const char prefix, const char fname)
	271	{
	272	char path[200];
	273	loff_t size;
	274	int ret, ret2;
	275
	276	snprintf(path, sizeof(path), "%s%s", prefix ? prefix : "", fname);
	277	log_debug("trying: %s\n", path);
	278
	279	free(bflow->fname);
	280	bflow->fname = strdup(path);
	281	if (!bflow->fname)
	282	return log_msg_ret("name", -ENOMEM);
	283
	284	if (IS_ENABLED(CONFIG_BOOTSTD_FULL) && bflow->fs_type)
	285	fs_set_type(bflow->fs_type);
	286
	287	ret = fs_size(path, &size);
	288	log_debug(" %s - err=%d\n", path, ret);
	289
	290	/* Sadly FS closes the file after fs_size() so we must redo this */
0c0c82b5	291	ret2 = bootmeth_setup_fs(bflow, desc);
a950d31a SG	292	if (ret2)
	293	return log_msg_ret("fs", ret2);
	294
	295	if (ret)
	296	return log_msg_ret("size", ret);
	297
	298	bflow->size = size;
	299	bflow->state = BOOTFLOWST_FILE;
	300
	301	return 0;
	302	}
	303
24d8e1b3 SG	304	int bootmeth_alloc_file(struct bootflow *bflow, uint size_limit, uint align)
	305	{
	306	void *buf;
	307	uint size;
	308	int ret;
	309
	310	size = bflow->size;
	311	log_debug(" - script file size %x\n", size);
	312	if (size > size_limit)
	313	return log_msg_ret("chk", -E2BIG);
	314
de7b5a8a	315	ret = fs_read_alloc(bflow->fname, bflow->size, align, &buf);
24d8e1b3 SG	316	if (ret)
	317	return log_msg_ret("all", ret);
	318
a950d31a SG	319	bflow->state = BOOTFLOWST_READY;
	320	bflow->buf = buf;
	321
	322	return 0;
	323	}
	324
24d8e1b3 SG	325	int bootmeth_alloc_other(struct bootflow bflow, const char fname,
	326	void *bufp, uint sizep)
	327	{
	328	struct blk_desc *desc = NULL;
	329	char path[200];
	330	loff_t size;
	331	void *buf;
	332	int ret;
	333
	334	snprintf(path, sizeof(path), "%s%s", bflow->subdir, fname);
	335	log_debug("trying: %s\n", path);
	336
	337	if (bflow->blk)
	338	desc = dev_get_uclass_plat(bflow->blk);
	339
0c0c82b5	340	ret = bootmeth_setup_fs(bflow, desc);
24d8e1b3 SG	341	if (ret)
	342	return log_msg_ret("fs", ret);
	343
	344	ret = fs_size(path, &size);
	345	log_debug(" %s - err=%d\n", path, ret);
	346
0c0c82b5	347	ret = bootmeth_setup_fs(bflow, desc);
24d8e1b3 SG	348	if (ret)
	349	return log_msg_ret("fs", ret);
	350
de7b5a8a	351	ret = fs_read_alloc(path, size, 0, &buf);
24d8e1b3 SG	352	if (ret)
	353	return log_msg_ret("all", ret);
	354
	355	*bufp = buf;
	356	*sizep = size;
	357
	358	return 0;
	359	}
	360
a950d31a SG	361	int bootmeth_common_read_file(struct udevice dev, struct bootflow bflow,
	362	const char file_path, ulong addr, ulong sizep)
	363	{
	364	struct blk_desc *desc = NULL;
	365	loff_t len_read;
	366	loff_t size;
	367	int ret;
	368
	369	if (bflow->blk)
	370	desc = dev_get_uclass_plat(bflow->blk);
	371
0c0c82b5	372	ret = bootmeth_setup_fs(bflow, desc);
a950d31a SG	373	if (ret)
	374	return log_msg_ret("fs", ret);
	375
	376	ret = fs_size(file_path, &size);
	377	if (ret)
	378	return log_msg_ret("size", ret);
	379	if (size > *sizep)
	380	return log_msg_ret("spc", -ENOSPC);
	381
0c0c82b5	382	ret = bootmeth_setup_fs(bflow, desc);
a950d31a SG	383	if (ret)
	384	return log_msg_ret("fs", ret);
	385
	386	ret = fs_read(file_path, addr, 0, 0, &len_read);
	387	if (ret)
	388	return ret;
	389	*sizep = len_read;
	390
	391	return 0;
	392	}
	393
	394	#ifdef CONFIG_BOOTSTD_FULL
	395	/**
	396	* on_bootmeths() - Update the bootmeth order
	397	*
2270c363	398	* This will check for a valid list of bootmeths and only apply it if valid.
a950d31a SG	399	*/
	400	static int on_bootmeths(const char name, const char value, enum env_op op,
	401	int flags)
	402	{
	403	int ret;
	404
	405	switch (op) {
	406	case env_op_create:
	407	case env_op_overwrite:
	408	ret = bootmeth_set_order(value);
	409	if (ret)
	410	return 1;
	411	return 0;
	412	case env_op_delete:
	413	bootmeth_set_order(NULL);
	414	fallthrough;
	415	default:
	416	return 0;
	417	}
	418	}
	419	U_BOOT_ENV_CALLBACK(bootmeths, on_bootmeths);
	420	#endif /* CONFIG_BOOTSTD_FULL */
	421
	422	UCLASS_DRIVER(bootmeth) = {
	423	.id = UCLASS_BOOTMETH,
	424	.name = "bootmeth",
	425	.flags = DM_UC_FLAG_SEQ_ALIAS,
	426	.per_device_plat_auto = sizeof(struct bootmeth_uc_plat),
	427	};