[U-Boot] [PATCH v2 3/6] dfu: mmc: rearrange the code

[Lukasz Majewski <lukma@denx.de>]

Hi Marek,

> Rename functions for bufferred file io operations to make them easier
> to understand. Also add missing file offset argument to them
> (currently unused). All this is a preparation to remove predefined
> file size limit (CONFIG_SYS_DFU_MAX_FILE_SIZE) for DFU read/write
> operations.

Acked-by: Lukasz Majewski <lukma@denx.de>

> 
> Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
> ---
>  drivers/dfu/dfu_mmc.c | 61
> ++++++++++++++++++++++++------------------- 1 file changed, 34
> insertions(+), 27 deletions(-)
> 
> diff --git a/drivers/dfu/dfu_mmc.c b/drivers/dfu/dfu_mmc.c
> index 403fd5351d..2d97f4528c 100644
> --- a/drivers/dfu/dfu_mmc.c
> +++ b/drivers/dfu/dfu_mmc.c
> @@ -91,22 +91,8 @@ static int mmc_block_op(enum dfu_op op, struct
> dfu_entity *dfu, return 0;
>  }
>  
> -static int mmc_file_buffer(struct dfu_entity *dfu, void *buf, long
> *len) -{
> -	if (dfu_file_buf_len + *len > CONFIG_SYS_DFU_MAX_FILE_SIZE) {
> -		dfu_file_buf_len = 0;
> -		return -EINVAL;
> -	}
> -
> -	/* Add to the current buffer. */
> -	memcpy(dfu_file_buf + dfu_file_buf_len, buf, *len);
> -	dfu_file_buf_len += *len;
> -
> -	return 0;
> -}
> -
>  static int mmc_file_op(enum dfu_op op, struct dfu_entity *dfu,
> -			void *buf, u64 *len)
> +			u64 offset, void *buf, u64 *len)
>  {
>  	char dev_part_str[8];
>  	int ret;
> @@ -137,7 +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, 0, 0, &size);
> +		ret = fs_read(dfu->name, (size_t)buf, offset, 0,
> &size); if (ret) {
>  			puts("dfu: fs_read error!\n");
>  			return ret;
> @@ -145,7 +131,7 @@ static int mmc_file_op(enum dfu_op op, struct
> dfu_entity *dfu, *len = size;
>  		break;
>  	case DFU_OP_WRITE:
> -		ret = fs_write(dfu->name, (size_t)buf, 0, *len,
> &size);
> +		ret = fs_write(dfu->name, (size_t)buf, offset, *len,
> &size); if (ret) {
>  			puts("dfu: fs_write error!\n");
>  			return ret;
> @@ -166,6 +152,30 @@ static int mmc_file_op(enum dfu_op op, struct
> dfu_entity *dfu, return ret;
>  }
>  
> +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) {
> +		dfu_file_buf_len = 0;
> +		return -EINVAL;
> +	}
> +
> +	/* Add to the current buffer. */
> +	memcpy(dfu_file_buf + dfu_file_buf_len, buf, *len);
> +	dfu_file_buf_len += *len;
> +
> +	return 0;
> +}
> +
> +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);
> +
> +	/* Now that we're done */
> +	dfu_file_buf_len = 0;
> +	return ret;
> +}
> +
>  int dfu_write_medium_mmc(struct dfu_entity *dfu,
>  		u64 offset, void *buf, long *len)
>  {
> @@ -177,7 +187,7 @@ int dfu_write_medium_mmc(struct dfu_entity *dfu,
>  		break;
>  	case DFU_FS_FAT:
>  	case DFU_FS_EXT4:
> -		ret = mmc_file_buffer(dfu, buf, len);
> +		ret = mmc_file_buf_write(dfu, offset, buf, len);
>  		break;
>  	default:
>  		printf("%s: Layout (%s) not (yet) supported!\n",
> __func__, @@ -193,11 +203,7 @@ int dfu_flush_medium_mmc(struct
> dfu_entity *dfu) 
>  	if (dfu->layout != DFU_RAW_ADDR) {
>  		/* Do stuff here. */
> -		ret = mmc_file_op(DFU_OP_WRITE, dfu, dfu_file_buf,
> -				&dfu_file_buf_len);
> -
> -		/* Now that we're done */
> -		dfu_file_buf_len = 0;
> +		ret = mmc_file_buf_write_finish(dfu);
>  	}
>  
>  	return ret;
> @@ -214,7 +220,7 @@ int dfu_get_medium_size_mmc(struct dfu_entity
> *dfu, u64 *size) case DFU_FS_FAT:
>  	case DFU_FS_EXT4:
>  		dfu_file_buf_filled = -1;
> -		ret = mmc_file_op(DFU_OP_SIZE, dfu, NULL, size);
> +		ret = mmc_file_op(DFU_OP_SIZE, dfu, 0, NULL, size);
>  		if (ret < 0)
>  			return ret;
>  		if (*size > CONFIG_SYS_DFU_MAX_FILE_SIZE)
> @@ -227,14 +233,15 @@ int dfu_get_medium_size_mmc(struct dfu_entity
> *dfu, u64 *size) }
>  }
>  
> -static int mmc_file_unbuffer(struct dfu_entity *dfu, u64 offset,
> void *buf, +
> +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, dfu_file_buf,
> &file_len);
> +		ret = mmc_file_op(DFU_OP_READ, dfu, 0, dfu_file_buf,
> &file_len); if (ret < 0)
>  			return ret;
>  		dfu_file_buf_filled = file_len;
> @@ -259,7 +266,7 @@ int dfu_read_medium_mmc(struct dfu_entity *dfu,
> u64 offset, void *buf, break;
>  	case DFU_FS_FAT:
>  	case DFU_FS_EXT4:
> -		ret = mmc_file_unbuffer(dfu, offset, buf, len);
> +		ret = mmc_file_buf_read(dfu, offset, buf, len);
>  		break;
>  	default:
>  		printf("%s: Layout (%s) not (yet) supported!\n",
> __func__,




Best regards,

Lukasz Majewski

--

DENX Software Engineering GmbH,      Managing Director: Wolfgang Denk
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-59 Fax: (+49)-8142-66989-80 Email: lukma at denx.de
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