Add support for operations on files larger than CONFIG_SYS_DFU_MAX_FILE_SIZE. The buffered io mechanism is still used for aggregating io requests, so for files up to CONFIG_SYS_DFU_MAX_FILE_SIZE nothing is changed and they will be handled in a single filesystem call.
Signed-off-by: Marek Szyprowski m.szyprowski@samsung.com Acked-by: Lukasz Majewski lukma@denx.de --- drivers/dfu/dfu_mmc.c | 46 ++++++++++++++++++++++++++++--------------- 1 file changed, 30 insertions(+), 16 deletions(-)
diff --git a/drivers/dfu/dfu_mmc.c b/drivers/dfu/dfu_mmc.c index e52c02be10..0d495a785b 100644 --- a/drivers/dfu/dfu_mmc.c +++ b/drivers/dfu/dfu_mmc.c @@ -17,7 +17,7 @@
static unsigned char *dfu_file_buf; static u64 dfu_file_buf_len; -static long dfu_file_buf_filled; +static u64 dfu_file_buf_offset;
static int mmc_block_op(enum dfu_op op, struct dfu_entity *dfu, u64 offset, void *buf, long *len) @@ -123,7 +123,7 @@ static int mmc_file_op(enum dfu_op op, struct dfu_entity *dfu,
switch (op) { case DFU_OP_READ: - ret = fs_read(dfu->name, (size_t)buf, offset, 0, &size); + ret = fs_read(dfu->name, (size_t)buf, offset, *len, &size); if (ret) { puts("dfu: fs_read error!\n"); return ret; @@ -154,25 +154,38 @@ static int mmc_file_op(enum dfu_op op, struct dfu_entity *dfu,
static int mmc_file_buf_write(struct dfu_entity *dfu, u64 offset, void *buf, long *len) { - if (dfu_file_buf_len + *len > CONFIG_SYS_DFU_MAX_FILE_SIZE) { + int ret = 0; + + if (offset == 0) { dfu_file_buf_len = 0; - return -EINVAL; + dfu_file_buf_offset = 0; }
/* Add to the current buffer. */ + if (dfu_file_buf_len + *len > CONFIG_SYS_DFU_MAX_FILE_SIZE) + *len = CONFIG_SYS_DFU_MAX_FILE_SIZE - dfu_file_buf_len; memcpy(dfu_file_buf + dfu_file_buf_len, buf, *len); dfu_file_buf_len += *len;
- return 0; + if (dfu_file_buf_len == CONFIG_SYS_DFU_MAX_FILE_SIZE) { + ret = mmc_file_op(DFU_OP_WRITE, dfu, dfu_file_buf_offset, + dfu_file_buf, &dfu_file_buf_len); + dfu_file_buf_offset += dfu_file_buf_len; + dfu_file_buf_len = 0; + } + + return ret; }
static int mmc_file_buf_write_finish(struct dfu_entity *dfu) { - int ret = mmc_file_op(DFU_OP_WRITE, dfu, 0, dfu_file_buf, - &dfu_file_buf_len); + int ret = mmc_file_op(DFU_OP_WRITE, dfu, dfu_file_buf_offset, + dfu_file_buf, &dfu_file_buf_len);
/* Now that we're done */ dfu_file_buf_len = 0; + dfu_file_buf_offset = 0; + return ret; }
@@ -219,12 +232,9 @@ int dfu_get_medium_size_mmc(struct dfu_entity *dfu, u64 *size) return 0; case DFU_FS_FAT: case DFU_FS_EXT4: - dfu_file_buf_filled = -1; ret = mmc_file_op(DFU_OP_SIZE, dfu, 0, NULL, size); if (ret < 0) return ret; - if (*size > CONFIG_SYS_DFU_MAX_FILE_SIZE) - return -1; return 0; default: printf("%s: Layout (%s) not (yet) supported!\n", __func__, @@ -238,19 +248,23 @@ static int mmc_file_buf_read(struct dfu_entity *dfu, u64 offset, void *buf, long *len) { int ret; - u64 file_len;
- if (dfu_file_buf_filled == -1) { - ret = mmc_file_op(DFU_OP_READ, dfu, 0, dfu_file_buf, &file_len); + if (offset == 0 || offset >= dfu_file_buf_offset + dfu_file_buf_len || + offset + *len < dfu_file_buf_offset) { + u64 file_len = CONFIG_SYS_DFU_MAX_FILE_SIZE; + + ret = mmc_file_op(DFU_OP_READ, dfu, offset, dfu_file_buf, + &file_len); if (ret < 0) return ret; - dfu_file_buf_filled = file_len; + dfu_file_buf_len = file_len; + dfu_file_buf_offset = offset; } - if (offset + *len > dfu_file_buf_filled) + if (offset + *len > dfu_file_buf_offset + dfu_file_buf_len) return -EINVAL;
/* Add to the current buffer. */ - memcpy(buf, dfu_file_buf + offset, *len); + memcpy(buf, dfu_file_buf + offset - dfu_file_buf_offset, *len);
return 0; }