[people/ms/u-boot.git] / common / image-sparse.c

/*
 * Copyright (c) 2009, Google Inc.
 * All rights reserved.
 *
 * Copyright (c) 2009-2014, The Linux Foundation. All rights reserved.
 * Portions Copyright 2014 Broadcom Corporation.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
 *     * Neither the name of The Linux Foundation nor
 *       the names of its contributors may be used to endorse or promote
 *       products derived from this software without specific prior written
 *       permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NON-INFRINGEMENT ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * NOTE:
 *   Although it is very similar, this license text is not identical
 *   to the "BSD-3-Clause", therefore, DO NOT MODIFY THIS LICENSE TEXT!
 */

#include <config.h>
#include <common.h>
#include <div64.h>
#include <errno.h>
#include <image-sparse.h>
#include <malloc.h>
#include <part.h>
#include <sparse_format.h>

#include <linux/math64.h>

typedef struct sparse_buffer {
	void	*data;
	u32	length;
	u32	repeat;
	u16	type;
} sparse_buffer_t;

static uint32_t last_offset;

static unsigned int sparse_get_chunk_data_size(sparse_header_t *sparse,
					       chunk_header_t *chunk)
{
	return chunk->total_sz - sparse->chunk_hdr_sz;
}

static unsigned int sparse_block_size_to_storage(unsigned int size,
						 sparse_storage_t *storage,
						 sparse_header_t *sparse)
{
	return size * sparse->blk_sz / storage->block_sz;
}

static bool sparse_chunk_has_buffer(chunk_header_t *chunk)
{
	switch (chunk->chunk_type) {
	case CHUNK_TYPE_RAW:
	case CHUNK_TYPE_FILL:
		return true;

	default:
		return false;
	}
}

static sparse_header_t *sparse_parse_header(void **data)
{
	/* Read and skip over sparse image header */
	sparse_header_t *sparse_header = (sparse_header_t *) *data;

	*data += sparse_header->file_hdr_sz;

	debug("=== Sparse Image Header ===\n");
	debug("magic: 0x%x\n", sparse_header->magic);
	debug("major_version: 0x%x\n", sparse_header->major_version);
	debug("minor_version: 0x%x\n", sparse_header->minor_version);
	debug("file_hdr_sz: %d\n", sparse_header->file_hdr_sz);
	debug("chunk_hdr_sz: %d\n", sparse_header->chunk_hdr_sz);
	debug("blk_sz: %d\n", sparse_header->blk_sz);
	debug("total_blks: %d\n", sparse_header->total_blks);
	debug("total_chunks: %d\n", sparse_header->total_chunks);

	return sparse_header;
}

static int sparse_parse_fill_chunk(sparse_header_t *sparse,
				   chunk_header_t *chunk)
{
	unsigned int chunk_data_sz = sparse_get_chunk_data_size(sparse, chunk);

	if (chunk_data_sz != sizeof(uint32_t))
		return -EINVAL;

	return 0;
}

static int sparse_parse_raw_chunk(sparse_header_t *sparse,
				  chunk_header_t *chunk)
{
	unsigned int chunk_data_sz = sparse_get_chunk_data_size(sparse, chunk);

	/* Check if the data size is a multiple of the main block size */
	if (chunk_data_sz % sparse->blk_sz)
		return -EINVAL;

	/* Check that the chunk size is consistent */
	if ((chunk_data_sz / sparse->blk_sz) != chunk->chunk_sz)
		return -EINVAL;

	return 0;
}

static chunk_header_t *sparse_parse_chunk(sparse_header_t *sparse,
					  void **image)
{
	chunk_header_t *chunk = (chunk_header_t *) *image;
	int ret;

	debug("=== Chunk Header ===\n");
	debug("chunk_type: 0x%x\n", chunk->chunk_type);
	debug("chunk_data_sz: 0x%x\n", chunk->chunk_sz);
	debug("total_size: 0x%x\n", chunk->total_sz);

	switch (chunk->chunk_type) {
	case CHUNK_TYPE_RAW:
		ret = sparse_parse_raw_chunk(sparse, chunk);
		if (ret)
			return NULL;
		break;

	case CHUNK_TYPE_FILL:
		ret = sparse_parse_fill_chunk(sparse, chunk);
		if (ret)
			return NULL;
		break;

	case CHUNK_TYPE_DONT_CARE:
	case CHUNK_TYPE_CRC32:
		debug("Ignoring chunk\n");
		break;

	default:
		printf("%s: Unknown chunk type: %x\n", __func__,
		       chunk->chunk_type);
		return NULL;
	}

	*image += sparse->chunk_hdr_sz;

	return chunk;
}

static int sparse_get_fill_buffer(sparse_header_t *sparse,
				  chunk_header_t *chunk,
				  sparse_buffer_t *buffer,
				  unsigned int blk_sz,
				  void *data)
{
	int i;

	buffer->type = CHUNK_TYPE_FILL;

	/*
	 * We create a buffer of one block, and ask it to be
	 * repeated as many times as needed.
	 */
	buffer->length = blk_sz;
	buffer->repeat = (chunk->chunk_sz * sparse->blk_sz) / blk_sz;

	buffer->data = memalign(ARCH_DMA_MINALIGN,
				ROUNDUP(blk_sz,
					ARCH_DMA_MINALIGN));
	if (!buffer->data)
		return -ENOMEM;

	for (i = 0; i < (buffer->length / sizeof(uint32_t)); i++)
		((uint32_t *)buffer->data)[i] = *(uint32_t *)(data);

	return 0;
}

static int sparse_get_raw_buffer(sparse_header_t *sparse,
				 chunk_header_t *chunk,
				 sparse_buffer_t *buffer,
				 unsigned int blk_sz,
				 void *data)
{
	unsigned int chunk_data_sz = sparse_get_chunk_data_size(sparse, chunk);

	buffer->type = CHUNK_TYPE_RAW;
	buffer->length = chunk_data_sz;
	buffer->data = data;
	buffer->repeat = 1;

	return 0;
}

static sparse_buffer_t *sparse_get_data_buffer(sparse_header_t *sparse,
					       chunk_header_t *chunk,
					       unsigned int blk_sz,
					       void **image)
{
	unsigned int chunk_data_sz = sparse_get_chunk_data_size(sparse, chunk);
	sparse_buffer_t *buffer;
	void *data = *image;
	int ret;

	*image += chunk_data_sz;

	if (!sparse_chunk_has_buffer(chunk))
		return NULL;

	buffer = calloc(sizeof(sparse_buffer_t), 1);
	if (!buffer)
		return NULL;

	switch (chunk->chunk_type) {
	case CHUNK_TYPE_RAW:
		ret = sparse_get_raw_buffer(sparse, chunk, buffer, blk_sz,
					    data);
		if (ret)
			return NULL;
		break;

	case CHUNK_TYPE_FILL:
		ret = sparse_get_fill_buffer(sparse, chunk, buffer, blk_sz,
					     data);
		if (ret)
			return NULL;
		break;

	default:
		return NULL;
	}

	debug("=== Buffer ===\n");
	debug("length: 0x%x\n", buffer->length);
	debug("repeat: 0x%x\n", buffer->repeat);
	debug("type: 0x%x\n", buffer->type);
	debug("data: 0x%p\n", buffer->data);

	return buffer;
}

static void sparse_put_data_buffer(sparse_buffer_t *buffer)
{
	if (buffer->type == CHUNK_TYPE_FILL)
		free(buffer->data);

	free(buffer);
}

int store_sparse_image(sparse_storage_t *storage, void *storage_priv,
		       unsigned int session_id, void *data)
{
	unsigned int chunk, offset;
	sparse_header_t *sparse_header;
	chunk_header_t *chunk_header;
	sparse_buffer_t *buffer;
	uint32_t start;
	uint32_t total_blocks = 0;
	uint32_t skipped = 0;
	int i;

	debug("=== Storage ===\n");
	debug("name: %s\n", storage->name);
	debug("block_size: 0x%x\n", storage->block_sz);
	debug("start: 0x%x\n", storage->start);
	debug("size: 0x%x\n", storage->size);
	debug("write: 0x%p\n", storage->write);
	debug("priv: 0x%p\n", storage_priv);

	sparse_header = sparse_parse_header(&data);
	if (!sparse_header) {
		printf("sparse header issue\n");
		return -EINVAL;
	}

	/*
	 * Verify that the sparse block size is a multiple of our
	 * storage backend block size
	 */
	div_u64_rem(sparse_header->blk_sz, storage->block_sz, &offset);
	if (offset) {
		printf("%s: Sparse image block size issue [%u]\n",
		       __func__, sparse_header->blk_sz);
		return -EINVAL;
	}

	/*
	 * If it's a new flashing session, start at the beginning of
	 * the partition. If not, then simply resume where we were.
	 */
	if (session_id > 0)
		start = last_offset;
	else
		start = storage->start;

	printf("Flashing sparse image on partition %s at offset 0x%x (ID: %d)\n",
	       storage->name, start * storage->block_sz, session_id);

	/* Start processing chunks */
	for (chunk = 0; chunk < sparse_header->total_chunks; chunk++) {
		uint32_t blkcnt;

		chunk_header = sparse_parse_chunk(sparse_header, &data);
		if (!chunk_header) {
			printf("Unknown chunk type");
			return -EINVAL;
		}

		/*
		 * If we have a DONT_CARE type, just skip the blocks
		 * and go on parsing the rest of the chunks
		 */
		if (chunk_header->chunk_type == CHUNK_TYPE_DONT_CARE) {
			skipped += sparse_block_size_to_storage(chunk_header->chunk_sz,
								storage,
								sparse_header);
			continue;
		}

		/* Retrieve the buffer we're going to write */
		buffer = sparse_get_data_buffer(sparse_header, chunk_header,
						storage->block_sz, &data);
		if (!buffer)
			continue;

		blkcnt = (buffer->length / storage->block_sz) * buffer->repeat;

		if ((start + total_blocks + blkcnt) >
		    (storage->start + storage->size)) {
			printf("%s: Request would exceed partition size!\n",
			       __func__);
			return -EINVAL;
		}

		for (i = 0; i < buffer->repeat; i++) {
			unsigned long buffer_blk_cnt;
			int ret;

			buffer_blk_cnt = buffer->length / storage->block_sz;

			ret = storage->write(storage, storage_priv,
					     start + total_blocks,
					     buffer_blk_cnt,
					     buffer->data);
			if (ret < 0) {
				printf("%s: Write %d failed %d\n",
				       __func__, i, ret);
				return ret;
			}

			total_blocks += ret;
		}

		sparse_put_data_buffer(buffer);
	}

	debug("Wrote %d blocks, skipped %d, expected to write %d blocks\n",
	      total_blocks, skipped,
	      sparse_block_size_to_storage(sparse_header->total_blks,
					   storage, sparse_header));
	printf("........ wrote %d blocks to '%s'\n", total_blocks,
	       storage->name);

	if ((total_blocks + skipped) !=
	    sparse_block_size_to_storage(sparse_header->total_blks,
					 storage, sparse_header)) {
		printf("sparse image write failure\n");
		return -EIO;
	}

	last_offset = start + total_blocks;

	return 0;
}
Commit	Line	Data
b4e4bbe5 SR	1	/*
	2	* Copyright (c) 2009, Google Inc.
	3	* All rights reserved.
	4	*
	5	* Copyright (c) 2009-2014, The Linux Foundation. All rights reserved.
e6ca1ad6	6	* Portions Copyright 2014 Broadcom Corporation.
b4e4bbe5 SR	7	*
	8	* Redistribution and use in source and binary forms, with or without
	9	* modification, are permitted provided that the following conditions are met:
	10	* * Redistributions of source code must retain the above copyright
	11	* notice, this list of conditions and the following disclaimer.
	12	* * Redistributions in binary form must reproduce the above copyright
	13	* notice, this list of conditions and the following disclaimer in the
	14	* documentation and/or other materials provided with the distribution.
	15	* * Neither the name of The Linux Foundation nor
	16	* the names of its contributors may be used to endorse or promote
	17	* products derived from this software without specific prior written
	18	* permission.
	19	*
	20	* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
	21	* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	22	* IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
	23	* NON-INFRINGEMENT ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
	24	* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
	25	* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
	26	* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
	27	* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
	28	* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
	29	* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
	30	* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
	31	*
1c39d856 SR	32	* NOTE:
	33	* Although it is very similar, this license text is not identical
	34	* to the "BSD-3-Clause", therefore, DO NOT MODIFY THIS LICENSE TEXT!
b4e4bbe5 SR	35	*/
b4e4bbe5 SR	36
e6ca1ad6 SR	37	#include <config.h>
e6ca1ad6 SR	38	#include <common.h>
40aeeda3	39	#include <div64.h>
7bfc3b13	40	#include <errno.h>
3d4ef38d	41	#include <image-sparse.h>
e6ca1ad6 SR	42	#include <malloc.h>
	43	#include <part.h>
	44	#include <sparse_format.h>
	45
40aeeda3 MR	46	#include <linux/math64.h>
40aeeda3 MR	47
7bfc3b13 MR	48	typedef struct sparse_buffer {
	49	void *data;
	50	u32 length;
	51	u32 repeat;
	52	u16 type;
	53	} sparse_buffer_t;
	54
1f8690aa MR	55	static uint32_t last_offset;
1f8690aa MR	56
7bfc3b13 MR	57	static unsigned int sparse_get_chunk_data_size(sparse_header_t *sparse,
	58	chunk_header_t *chunk)
	59	{
	60	return chunk->total_sz - sparse->chunk_hdr_sz;
	61	}
	62
a5d1e04a MR	63	static unsigned int sparse_block_size_to_storage(unsigned int size,
	64	sparse_storage_t *storage,
	65	sparse_header_t *sparse)
	66	{
	67	return size * sparse->blk_sz / storage->block_sz;
	68	}
	69
7bfc3b13 MR	70	static bool sparse_chunk_has_buffer(chunk_header_t *chunk)
	71	{
	72	switch (chunk->chunk_type) {
	73	case CHUNK_TYPE_RAW:
	74	case CHUNK_TYPE_FILL:
	75	return true;
	76
	77	default:
	78	return false;
	79	}
	80	}
	81
bb83c0f3 MR	82	static sparse_header_t sparse_parse_header(void *data)
	83	{
	84	/* Read and skip over sparse image header */
	85	sparse_header_t sparse_header = (sparse_header_t ) *data;
	86
	87	*data += sparse_header->file_hdr_sz;
	88
	89	debug("=== Sparse Image Header ===\n");
	90	debug("magic: 0x%x\n", sparse_header->magic);
	91	debug("major_version: 0x%x\n", sparse_header->major_version);
	92	debug("minor_version: 0x%x\n", sparse_header->minor_version);
	93	debug("file_hdr_sz: %d\n", sparse_header->file_hdr_sz);
	94	debug("chunk_hdr_sz: %d\n", sparse_header->chunk_hdr_sz);
	95	debug("blk_sz: %d\n", sparse_header->blk_sz);
	96	debug("total_blks: %d\n", sparse_header->total_blks);
	97	debug("total_chunks: %d\n", sparse_header->total_chunks);
	98
	99	return sparse_header;
	100	}
	101
7bfc3b13 MR	102	static int sparse_parse_fill_chunk(sparse_header_t *sparse,
	103	chunk_header_t *chunk)
	104	{
	105	unsigned int chunk_data_sz = sparse_get_chunk_data_size(sparse, chunk);
	106
	107	if (chunk_data_sz != sizeof(uint32_t))
	108	return -EINVAL;
	109
	110	return 0;
	111	}
	112
	113	static int sparse_parse_raw_chunk(sparse_header_t *sparse,
	114	chunk_header_t *chunk)
	115	{
	116	unsigned int chunk_data_sz = sparse_get_chunk_data_size(sparse, chunk);
	117
	118	/* Check if the data size is a multiple of the main block size */
	119	if (chunk_data_sz % sparse->blk_sz)
	120	return -EINVAL;
	121
	122	/* Check that the chunk size is consistent */
	123	if ((chunk_data_sz / sparse->blk_sz) != chunk->chunk_sz)
	124	return -EINVAL;
	125
	126	return 0;
	127	}
	128
	129	static chunk_header_t sparse_parse_chunk(sparse_header_t sparse,
	130	void **image)
	131	{
	132	chunk_header_t chunk = (chunk_header_t ) *image;
	133	int ret;
	134
	135	debug("=== Chunk Header ===\n");
	136	debug("chunk_type: 0x%x\n", chunk->chunk_type);
	137	debug("chunk_data_sz: 0x%x\n", chunk->chunk_sz);
	138	debug("total_size: 0x%x\n", chunk->total_sz);
	139
	140	switch (chunk->chunk_type) {
	141	case CHUNK_TYPE_RAW:
	142	ret = sparse_parse_raw_chunk(sparse, chunk);
	143	if (ret)
	144	return NULL;
	145	break;
	146
	147	case CHUNK_TYPE_FILL:
	148	ret = sparse_parse_fill_chunk(sparse, chunk);
	149	if (ret)
	150	return NULL;
	151	break;
	152
	153	case CHUNK_TYPE_DONT_CARE:
	154	case CHUNK_TYPE_CRC32:
	155	debug("Ignoring chunk\n");
	156	break;
	157
	158	default:
	159	printf("%s: Unknown chunk type: %x\n", __func__,
	160	chunk->chunk_type);
	161	return NULL;
	162	}
	163
	164	*image += sparse->chunk_hdr_sz;
	165
166	return chunk;
167	}
168
169	static int sparse_get_fill_buffer(sparse_header_t *sparse,
170	chunk_header_t *chunk,
171	sparse_buffer_t *buffer,
172	unsigned int blk_sz,
173	void *data)
174	{
175	int i;
176
177	buffer->type = CHUNK_TYPE_FILL;
178
179	/*
180	* We create a buffer of one block, and ask it to be
181	* repeated as many times as needed.
182	*/
183	buffer->length = blk_sz;
184	buffer->repeat = (chunk->chunk_sz * sparse->blk_sz) / blk_sz;
185
186	buffer->data = memalign(ARCH_DMA_MINALIGN,
187	ROUNDUP(blk_sz,
188	ARCH_DMA_MINALIGN));
189	if (!buffer->data)
190	return -ENOMEM;
191
192	for (i = 0; i < (buffer->length / sizeof(uint32_t)); i++)
193	((uint32_t )buffer->data)[i] = (uint32_t *)(data);
194
195	return 0;
196	}
197
198	static int sparse_get_raw_buffer(sparse_header_t *sparse,
199	chunk_header_t *chunk,
200	sparse_buffer_t *buffer,
201	unsigned int blk_sz,
202	void *data)
203	{
204	unsigned int chunk_data_sz = sparse_get_chunk_data_size(sparse, chunk);
205
206	buffer->type = CHUNK_TYPE_RAW;
207	buffer->length = chunk_data_sz;
208	buffer->data = data;
209	buffer->repeat = 1;
210
211	return 0;
212	}
213
214	static sparse_buffer_t sparse_get_data_buffer(sparse_header_t sparse,
215	chunk_header_t *chunk,
216	unsigned int blk_sz,
217	void **image)
218	{
219	unsigned int chunk_data_sz = sparse_get_chunk_data_size(sparse, chunk);
220	sparse_buffer_t *buffer;
221	void data = image;
222	int ret;
223
224	*image += chunk_data_sz;
225
226	if (!sparse_chunk_has_buffer(chunk))
227	return NULL;
228
229	buffer = calloc(sizeof(sparse_buffer_t), 1);
230	if (!buffer)
231	return NULL;
232
233	switch (chunk->chunk_type) {
234	case CHUNK_TYPE_RAW:
235	ret = sparse_get_raw_buffer(sparse, chunk, buffer, blk_sz,
236	data);
237	if (ret)
238	return NULL;
239	break;
240
241	case CHUNK_TYPE_FILL:
242	ret = sparse_get_fill_buffer(sparse, chunk, buffer, blk_sz,
243	data);
244	if (ret)
245	return NULL;
246	break;
247
248	default:
249	return NULL;
250	}
251
252	debug("=== Buffer ===\n");
253	debug("length: 0x%x\n", buffer->length);
254	debug("repeat: 0x%x\n", buffer->repeat);
255	debug("type: 0x%x\n", buffer->type);
256	debug("data: 0x%p\n", buffer->data);
257
258	return buffer;
259	}
260
261	static void sparse_put_data_buffer(sparse_buffer_t *buffer)
262	{
263	if (buffer->type == CHUNK_TYPE_FILL)
264	free(buffer->data);
265
266	free(buffer);
267	}
268
6c9e00ee MR	269	int store_sparse_image(sparse_storage_t storage, void storage_priv,
6c9e00ee MR	270	unsigned int session_id, void *data)
b4e4bbe5	271	{
40aeeda3	272	unsigned int chunk, offset;
b4e4bbe5 SR	273	sparse_header_t *sparse_header;
b4e4bbe5 SR	274	chunk_header_t *chunk_header;
7bfc3b13	275	sparse_buffer_t *buffer;
a5d1e04a	276	uint32_t start;
b4e4bbe5	277	uint32_t total_blocks = 0;
7bfc3b13	278	uint32_t skipped = 0;
b4e4bbe5	279	int i;
b4e4bbe5	280
a5d1e04a MR	281	debug("=== Storage ===\n");
	282	debug("name: %s\n", storage->name);
	283	debug("block_size: 0x%x\n", storage->block_sz);
	284	debug("start: 0x%x\n", storage->start);
	285	debug("size: 0x%x\n", storage->size);
	286	debug("write: 0x%p\n", storage->write);
	287	debug("priv: 0x%p\n", storage_priv);
	288
bb83c0f3 MR	289	sparse_header = sparse_parse_header(&data);
bb83c0f3 MR	290	if (!sparse_header) {
3c8f98f5 MR	291	printf("sparse header issue\n");
3c8f98f5 MR	292	return -EINVAL;
b4e4bbe5 SR	293	}
b4e4bbe5 SR	294
40aeeda3 MR	295	/*
	296	* Verify that the sparse block size is a multiple of our
	297	* storage backend block size
	298	*/
a5d1e04a	299	div_u64_rem(sparse_header->blk_sz, storage->block_sz, &offset);
40aeeda3	300	if (offset) {
e6ca1ad6 SR	301	printf("%s: Sparse image block size issue [%u]\n",
e6ca1ad6 SR	302	__func__, sparse_header->blk_sz);
3c8f98f5	303	return -EINVAL;
e6ca1ad6 SR	304	}
e6ca1ad6 SR	305
1f8690aa MR	306	/*
	307	* If it's a new flashing session, start at the beginning of
	308	* the partition. If not, then simply resume where we were.
	309	*/
	310	if (session_id > 0)
	311	start = last_offset;
	312	else
	313	start = storage->start;
	314
	315	printf("Flashing sparse image on partition %s at offset 0x%x (ID: %d)\n",
	316	storage->name, start * storage->block_sz, session_id);
e6ca1ad6	317
b4e4bbe5	318	/* Start processing chunks */
7bfc3b13	319	for (chunk = 0; chunk < sparse_header->total_chunks; chunk++) {
a5d1e04a MR	320	uint32_t blkcnt;
a5d1e04a MR	321
7bfc3b13 MR	322	chunk_header = sparse_parse_chunk(sparse_header, &data);
7bfc3b13 MR	323	if (!chunk_header) {
3c8f98f5 MR	324	printf("Unknown chunk type");
3c8f98f5 MR	325	return -EINVAL;
e6ca1ad6	326	}
b4e4bbe5	327
7bfc3b13 MR	328	/*
	329	* If we have a DONT_CARE type, just skip the blocks
	330	* and go on parsing the rest of the chunks
	331	*/
	332	if (chunk_header->chunk_type == CHUNK_TYPE_DONT_CARE) {
a5d1e04a MR	333	skipped += sparse_block_size_to_storage(chunk_header->chunk_sz,
	334	storage,
	335	sparse_header);
7bfc3b13	336	continue;
b4e4bbe5 SR	337	}
b4e4bbe5 SR	338
7bfc3b13 MR	339	/* Retrieve the buffer we're going to write */
7bfc3b13 MR	340	buffer = sparse_get_data_buffer(sparse_header, chunk_header,
a5d1e04a	341	storage->block_sz, &data);
7bfc3b13 MR	342	if (!buffer)
7bfc3b13 MR	343	continue;
e6ca1ad6	344
a5d1e04a	345	blkcnt = (buffer->length / storage->block_sz) * buffer->repeat;
b4e4bbe5	346
7bfc3b13	347	if ((start + total_blocks + blkcnt) >
a5d1e04a	348	(storage->start + storage->size)) {
7bfc3b13 MR	349	printf("%s: Request would exceed partition size!\n",
7bfc3b13 MR	350	__func__);
3c8f98f5	351	return -EINVAL;
7bfc3b13	352	}
b4e4bbe5	353
7bfc3b13 MR	354	for (i = 0; i < buffer->repeat; i++) {
7bfc3b13 MR	355	unsigned long buffer_blk_cnt;
a5d1e04a MR	356	int ret;
	357
	358	buffer_blk_cnt = buffer->length / storage->block_sz;
	359
	360	ret = storage->write(storage, storage_priv,
	361	start + total_blocks,
	362	buffer_blk_cnt,
	363	buffer->data);
	364	if (ret < 0) {
	365	printf("%s: Write %d failed %d\n",
	366	__func__, i, ret);
	367	return ret;
b4e4bbe5	368	}
b4e4bbe5	369
a5d1e04a	370	total_blocks += ret;
b4e4bbe5	371	}
7bfc3b13 MR	372
7bfc3b13 MR	373	sparse_put_data_buffer(buffer);
b4e4bbe5 SR	374	}
b4e4bbe5 SR	375
7bfc3b13	376	debug("Wrote %d blocks, skipped %d, expected to write %d blocks\n",
a5d1e04a MR	377	total_blocks, skipped,
	378	sparse_block_size_to_storage(sparse_header->total_blks,
	379	storage, sparse_header));
	380	printf("........ wrote %d blocks to '%s'\n", total_blocks,
	381	storage->name);
	382
	383	if ((total_blocks + skipped) !=
	384	sparse_block_size_to_storage(sparse_header->total_blks,
	385	storage, sparse_header)) {
3c8f98f5 MR	386	printf("sparse image write failure\n");
	387	return -EIO;
	388	}
b4e4bbe5	389
1f8690aa MR	390	last_offset = start + total_blocks;
1f8690aa MR	391
3c8f98f5	392	return 0;
b4e4bbe5	393	}