diff options
Diffstat (limited to 'include')
| -rw-r--r-- | include/blk.h | 39 |
1 files changed, 38 insertions, 1 deletions
diff --git a/include/blk.h b/include/blk.h index d3ab9a10b9..e854166edb 100644 --- a/include/blk.h +++ b/include/blk.h @@ -274,6 +274,43 @@ unsigned long blk_derase(struct blk_desc *block_dev, lbaint_t start, lbaint_t blkcnt); /** + * blk_read() - Read from a block device + * + * @dev: Device to read from + * @start: Start block for the read + * @blkcnt: Number of blocks to read + * @buf: Place to put the data + * @return number of blocks read (which may be less than @blkcnt), + * or -ve on error. This never returns 0 unless @blkcnt is 0 + */ +long blk_read(struct udevice *dev, lbaint_t start, lbaint_t blkcnt, + void *buffer); + +/** + * blk_write() - Write to a block device + * + * @dev: Device to write to + * @start: Start block for the write + * @blkcnt: Number of blocks to write + * @buf: Data to write + * @return number of blocks written (which may be less than @blkcnt), + * or -ve on error. This never returns 0 unless @blkcnt is 0 + */ +long blk_write(struct udevice *dev, lbaint_t start, lbaint_t blkcnt, + const void *buffer); + +/** + * blk_erase() - Erase part of a block device + * + * @dev: Device to erase + * @start: Start block for the erase + * @blkcnt: Number of blocks to erase + * @return number of blocks erased (which may be less than @blkcnt), + * or -ve on error. This never returns 0 unless @blkcnt is 0 + */ +long blk_erase(struct udevice *dev, lbaint_t start, lbaint_t blkcnt); + +/** * blk_find_device() - Find a block device * * This function does not activate the device. The device will be returned @@ -428,7 +465,7 @@ const char *blk_get_devtype(struct udevice *dev); /** * blk_get_by_device() - Get the block device descriptor for the given device - * @dev: Instance of a storage device + * @dev: Instance of a storage device (the parent of the block device) * * Return: With block device descriptor on success , NULL if there is no such * block device. |