[PATCH v5 4/6] blkmap: store type of blkmap slice in corresponding structure

[Ilias Apalodimas]

On Thu, 27 Feb 2025 at 13:15, Sughosh Ganu <sughosh.ganu at linaro.org> wrote:
>
> Add information about the type of blkmap slice as an attribute in the
> corresponding slice structure. Put information in the blkmap slice
> structure to identify if it is associated with a memory or linear
> mapped device. Which can then be used to take specific action based on
> the type of the blkmap slice.
>
> Signed-off-by: Sughosh Ganu <sughosh.ganu at linaro.org>
> ---
> Changes since V4:
> * Use BIT() based macros instead of enum
> * Change the name of the field from type to attr as it would contain
>   attributes other than the type of the slice
>
>  drivers/block/blkmap.c | 8 ++++++++
>  1 file changed, 8 insertions(+)
>
> diff --git a/drivers/block/blkmap.c b/drivers/block/blkmap.c
> index 34eed1380dc..453510cca62 100644
> --- a/drivers/block/blkmap.c
> +++ b/drivers/block/blkmap.c
> @@ -16,6 +16,10 @@
>
>  struct blkmap;
>
> +/* Attributes of blkmap slice */
> +#define BLKMAP_SLICE_LINEAR    BIT(0)
> +#define BLKMAP_SLICE_MEM       BIT(1)
> +
>  /**
>   * struct blkmap_slice - Region mapped to a blkmap
>   *
> @@ -25,12 +29,14 @@ struct blkmap;
>   * @node: List node used to associate this slice with a blkmap
>   * @blknr: Start block number of the mapping
>   * @blkcnt: Number of blocks covered by this mapping
> + * @attr: Attributes of blkmap slice
>   */
>  struct blkmap_slice {
>         struct list_head node;
>
>         lbaint_t blknr;
>         lbaint_t blkcnt;
> +       uint     attr;
>
>         /**
>          * @read: - Read from slice
> @@ -169,6 +175,7 @@ int blkmap_map_linear(struct udevice *dev, lbaint_t blknr, lbaint_t blkcnt,
>                 .slice = {
>                         .blknr = blknr,
>                         .blkcnt = blkcnt,
> +                       .attr = BLKMAP_SLICE_LINEAR,
>
>                         .read = blkmap_linear_read,
>                         .write = blkmap_linear_write,
> @@ -248,6 +255,7 @@ int __blkmap_map_mem(struct udevice *dev, lbaint_t blknr, lbaint_t blkcnt,
>                 .slice = {
>                         .blknr = blknr,
>                         .blkcnt = blkcnt,
> +                       .attr = BLKMAP_SLICE_MEM,
>
>                         .read = blkmap_mem_read,
>                         .write = blkmap_mem_write,
> --
> 2.34.1
>

Reviewed-by: Ilias Apalodimas <ilias.apalodimas at linaro.org>