Hi Varada,
On 1/8/2026 3:07 PM, Varadarajan Narayanan wrote:
On Thu, Jan 08, 2026 at 12:19:45PM +0530, Balaji Selvanathan wrote:
Introduce scsi_get_blk_by_type_guid() function to enable SCSI
partition discovery using partition type GUID. This function scans
all available SCSI devices and searches for a partition matching the
specified type GUID.
Signed-off-by: Balaji Selvanathan <[email protected]>
---
drivers/scsi/scsi-uclass.c | 28 ++++++++++++++++++++++++++++
include/scsi.h | 11 +++++++++++
2 files changed, 39 insertions(+)
diff --git a/drivers/scsi/scsi-uclass.c b/drivers/scsi/scsi-uclass.c
index 3eb6069649f..42a6b5233c2 100644
--- a/drivers/scsi/scsi-uclass.c
+++ b/drivers/scsi/scsi-uclass.c
@@ -53,6 +53,34 @@ int scsi_get_blk_by_uuid(const char *uuid,
return -1;
}
+int scsi_get_blk_by_type_guid(const char *type_guid,
+ 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++) {
max = blk_find_max_devnum(UCLASS_SCSI) + 1;
for (i = 0; i < max; i++) {
Else, i believe blk_find_max_devnum() will get invoked multiple times.
-Varada
Thanks for the feedback. Addressed this.
Regards,
Balaji
+ ret = blk_get_desc(UCLASS_SCSI, i, &blk);
+ if (ret)
+ continue;
+
+ ret = part_get_info_by_type_guid(blk, type_guid, 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 8d6c5116419..e0b2f869057 100644
--- a/include/scsi.h
+++ b/include/scsi.h
@@ -361,6 +361,17 @@ int scsi_scan_dev(struct udevice *dev, bool verbose);
int scsi_get_blk_by_uuid(const char *uuid, struct blk_desc **blk_desc_ptr,
struct disk_partition *part_info_ptr);
+
+/**
+ * scsi_get_blk_by_type_guid() - Provides SCSI partition information by type
GUID.
+ *
+ * @type_guid: Type GUID of the partition for fetching its info
+ * @blk_desc_ptr: Provides the blk descriptor
+ * @part_info_ptr: Provides partition info
+ */
+int scsi_get_blk_by_type_guid(const char *type_guid, struct blk_desc
**blk_desc_ptr,
+ struct disk_partition *part_info_ptr);
+
#define SCSI_IDENTIFY 0xC0 /* not used */
/* Hardware errors */
--
2.34.1
