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dfu: mmc: remove file size limit for io operations

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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>
Signed-off-by: Matthias Brugger <mbrugger@suse.com>
This commit is contained in:
Marek Szyprowski 2019-12-02 12:11:16 +01:00 committed by Matthias Brugger
parent 774f8b00b6
commit c2a1e3dbf8
1 changed files with 30 additions and 16 deletions
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46
drivers/dfu/dfu_mmc.c
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@ -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;
}