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scsi: Implement get_blk() function

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Add a function to obtain the block device for SCSI.

Signed-off-by: Varadarajan Narayanan <quic_varada@quicinc.com>
Acked-by: Casey Connolly <casey.connolly@linaro.org>
This commit is contained in:
Varadarajan Narayanan
2025-05-13 14:47:07 +05:30
committed by Tom Rini
parent 43fd4bcefd
commit 9a2010941f
2 changed files with 40 additions and 0 deletions
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30
drivers/scsi/scsi-uclass.c
View File

@@ -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_by_uuid(const char *uuid,
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_uuid(blk, uuid, 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);

10
include/scsi.h
View File

@@ -351,6 +351,16 @@ int scsi_scan(bool verbose);
*/
int scsi_scan_dev(struct udevice *dev, bool verbose);
/**
* scsi_get_blk_by_uuid() - Provides SCSI partition information.
*
* @uuid: UUID 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_uuid(const char *uuid, struct blk_desc **blk_desc_ptr,
struct disk_partition *part_info_ptr);
#define SCSI_IDENTIFY 0xC0 /* not used */
/* Hardware errors */