diff mbox series

[v9,6/8] blkmap: store type of blkmap slice in corresponding structure

Message ID 20250317083402.412310-7-sughosh.ganu@linaro.org
State New
Headers show
Series Add pmem node for preserving distro ISO's | expand

Commit Message

Sughosh Ganu March 17, 2025, 8:34 a.m. UTC 
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>
---
Changes since V8:
* s/blkmap slice/blkmap slices/ in the commit message
* Add comments to the macros added in the patch

 drivers/block/blkmap.c | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)
diff mbox series

Patch

diff --git a/drivers/block/blkmap.c b/drivers/block/blkmap.c
index 34eed1380dc..08f68570224 100644
--- a/drivers/block/blkmap.c
+++ b/drivers/block/blkmap.c
@@ -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,