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/*
* 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 (unsigned int)lldiv((uint64_t)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;
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) {
blkcnt = sparse_block_size_to_storage(chunk_header->chunk_sz,
storage,
sparse_header);
#ifdef CONFIG_FASTBOOT_FLASH_MMC_DEV
total_blocks += blkcnt;
#endif
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, expected to write %d blocks\n",
total_blocks,
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 !=
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;
}