In order to process the CHUNK_TYPE_DONT_CARE properly, there is a requirement to be able to 'reserve' a specified number of blocks in the storage media. Because of the special handling of "bad blocks" in NAND devices, this is implemented in a storage abstraction function.
Signed-off-by: Steve Rae srae@broadcom.com ---
Changes in v2: None
common/fb_mmc.c | 7 +++++++ common/fb_nand.c | 20 ++++++++++++++++++++ common/image-sparse.c | 5 ++--- include/image-sparse.h | 4 ++++ 4 files changed, 33 insertions(+), 3 deletions(-)
diff --git a/common/fb_mmc.c b/common/fb_mmc.c index 6bafbc6..c739651 100644 --- a/common/fb_mmc.c +++ b/common/fb_mmc.c @@ -53,6 +53,12 @@ static lbaint_t fb_mmc_sparse_write(struct sparse_storage *info, return blk_dwrite(dev_desc, blk, blkcnt, buffer); }
+static lbaint_t fb_mmc_sparse_reserve(struct sparse_storage *info, + lbaint_t blk, lbaint_t blkcnt) +{ + return blkcnt; +} + static void write_raw_image(struct blk_desc *dev_desc, disk_partition_t *info, const char *part_name, void *buffer, unsigned int download_bytes) @@ -131,6 +137,7 @@ void fb_mmc_flash_write(const char *cmd, void *download_buffer, sparse.start = info.start; sparse.size = info.size; sparse.write = fb_mmc_sparse_write; + sparse.reserve = fb_mmc_sparse_reserve;
printf("Flashing sparse image at offset " LBAFU "\n", sparse.start); diff --git a/common/fb_nand.c b/common/fb_nand.c index 77ca55d..c8c79e9 100644 --- a/common/fb_nand.c +++ b/common/fb_nand.c @@ -126,6 +126,25 @@ static lbaint_t fb_nand_sparse_write(struct sparse_storage *info, return written / info->blksz; }
+static lbaint_t fb_nand_sparse_reserve(struct sparse_storage *info, + lbaint_t blk, lbaint_t blkcnt) +{ + int bad_blocks = 0; + +/* + * TODO - implement a function to determine the total number + * of blocks which must be used in order to reserve the specified + * number ("blkcnt") of "good-blocks", starting at "blk"... + * ( possibly something like the "check_skip_len()" function ) + */ + + /* + * the return value must be 'blkcnt' ("good-blocks") plus the + * number of "bad-blocks" encountered within this space... + */ + return blkcnt + bad_blocks; +} + void fb_nand_flash_write(const char *cmd, void *download_buffer, unsigned int download_bytes) { @@ -155,6 +174,7 @@ void fb_nand_flash_write(const char *cmd, void *download_buffer, sparse.start = part->offset / sparse.blksz; sparse.size = part->size / sparse.blksz; sparse.write = fb_nand_sparse_write; + sparse.reserve = fb_nand_sparse_reserve;
printf("Flashing sparse image at offset " LBAFU "\n", sparse.start); diff --git a/common/image-sparse.c b/common/image-sparse.c index b36703b..9632c6f 100644 --- a/common/image-sparse.c +++ b/common/image-sparse.c @@ -1,3 +1,4 @@ + /* * Copyright (c) 2009, Google Inc. * All rights reserved. @@ -210,10 +211,8 @@ void write_sparse_image( break;
case CHUNK_TYPE_DONT_CARE: -#ifdef CONFIG_FASTBOOT_FLASH_MMC_DEV - blk += blkcnt; + blk += info->reserve(info, blk, blkcnt); total_blocks += chunk_header->chunk_sz; -#endif break;
case CHUNK_TYPE_CRC32: diff --git a/include/image-sparse.h b/include/image-sparse.h index f6869d6..b0cc500 100644 --- a/include/image-sparse.h +++ b/include/image-sparse.h @@ -19,6 +19,10 @@ struct sparse_storage { lbaint_t blk, lbaint_t blkcnt, const void *buffer); + + lbaint_t (*reserve)(struct sparse_storage *info, + lbaint_t blk, + lbaint_t blkcnt); };
static inline int is_sparse_image(void *buf)