On 01.04.25 10:00, Varadarajan Narayanan wrote:
Add a function to obtain the block device for SCSI.
Signed-off-by: Varadarajan Narayanan <[email protected]>
---
drivers/scsi/scsi-uclass.c | 30 ++++++++++++++++++++++++++++++
include/scsi.h | 12 ++++++++++++
2 files changed, 42 insertions(+)
diff --git a/drivers/scsi/scsi-uclass.c b/drivers/scsi/scsi-uclass.c
index 1ee8236c05c..c2e34082bce 100644
--- a/drivers/scsi/scsi-uclass.c
+++ b/drivers/scsi/scsi-uclass.c
@@ -10,7 +10,9 @@
#define LOG_CATEGORY UCLASS_SCSI
+#include <blk.h>
#include <dm.h>
+#include <part.h>
#include <scsi.h>
int scsi_exec(struct udevice *dev, struct scsi_cmd *pccb)
@@ -23,6 +25,34 @@ int scsi_exec(struct udevice *dev, struct scsi_cmd *pccb)
return ops->exec(dev, pccb);
}
+int scsi_get_blk(const char *partition_name,
+ struct blk_desc **blk_desc_ptr,
+ struct disk_partition *part_info_ptr)
+{
+ static int is_scsi_scanned;
+ struct blk_desc *blk;
+ int i, ret;
+
+ if (!is_scsi_scanned) {
+ scsi_scan(false /* no verbose */);
+ is_scsi_scanned = 1;
+ }
+
+ for (i = 0; i < blk_find_max_devnum(UCLASS_SCSI) + 1; i++) {
+ ret = blk_get_desc(UCLASS_SCSI, i, &blk);
+ if (ret)
+ continue;
+
+ ret = part_get_info_by_name(blk, partition_name, part_info_ptr);
+ if (ret > 0) {
+ *blk_desc_ptr = blk;
+ return 0;
+ }
+ }
+
+ return -1;
+}
+
int scsi_bus_reset(struct udevice *dev)
{
struct scsi_ops *ops = scsi_get_ops(dev);
diff --git a/include/scsi.h b/include/scsi.h
index b18ae37b861..1ba55516588 100644
--- a/include/scsi.h
+++ b/include/scsi.h
@@ -9,6 +9,7 @@
#include <asm/cache.h>
#include <bouncebuf.h>
#include <linux/dma-direction.h>
+#include <part.h>
struct udevice;
@@ -349,6 +350,17 @@ int scsi_scan(bool verbose);
*/
int scsi_scan_dev(struct udevice *dev, bool verbose);
+/**
+ * scsi_get_blk() - Provides SCSI partition information.
+ *
+ * @partition_name: Partition name for fetching its info
Partition names cannot be expected to be unique.
UUIDs should be.
Best regards
Heinrich
+ * @blk_desc_ptr: Provides the blk descriptor
+ * @part_info_ptr: Provides partition info
+ */
+int scsi_get_blk(const char *partition_name,
+ struct blk_desc **blk_desc_ptr,
+ struct disk_partition *part_info_ptr);
+
#define SCSI_IDENTIFY 0xC0 /* not used */
/* Hardware errors */
