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blkmap: store type of blkmap slice in corresponding structure

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Add information about the type of blkmap slices 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@linaro.org>
Reviewed-by: Tobias Waldekranz <tobias@waldekranz.com>
Reviewed-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
Signed-off-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
This commit is contained in:
Sughosh Ganu
2025-03-17 14:04:00 +05:30
committed by Ilias Apalodimas
parent fc82cf66d0
commit 45c3980282
1 changed files with 20 additions and 0 deletions
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20
drivers/block/blkmap.c
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@@ -16,6 +16,22 @@
struct blkmap;
/**
* define BLKMAP_SLICE_LINEAR - Linear mapping to another block device
*
* This blkmap slice type is used for mapping to other existing block
* devices.
*/
#define BLKMAP_SLICE_LINEAR BIT(0)
/**
* define BLKMAP_SLICE_MEM - Linear mapping to memory based block device
*
* This blkmap slice type is used for mapping to memory based block
* devices, like ramdisks.
*/
#define BLKMAP_SLICE_MEM BIT(1)
/**
* struct blkmap_slice - Region mapped to a blkmap
*
@@ -25,12 +41,14 @@ 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 +187,7 @@ 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 +267,7 @@ 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,