scsi: ufs-bsg: Add support for uic commands in ufs_bsg_request()

Make ufshcd_send_uic_cmd() public for that.
Signed-off-by: Avri Altman <avri.altman@wdc.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Bart Van Assche <Bart.VanAssche@wdc.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/ufs/ufs_bsg.c

@@ -84,6 +84,7 @@ static int ufs_bsg_request(struct bsg_job *job)
 	struct ufs_hba *hba = shost_priv(dev_to_shost(job->dev->parent));
 	unsigned int req_len = job->request_len;
 	unsigned int reply_len = job->reply_len;
+	struct uic_command uc = {};
 	int msgcode;
 	uint8_t *desc_buff = NULL;
 	int desc_len = 0;
@@ -116,6 +117,16 @@ static int ufs_bsg_request(struct bsg_job *job)
 			dev_err(hba->dev,
 				"exe raw upiu: error code %d\n", ret);
 
+		break;
+	case UPIU_TRANSACTION_UIC_CMD:
+		memcpy(&uc, &bsg_request->upiu_req.uc, UIC_CMD_SIZE);
+		ret = ufshcd_send_uic_cmd(hba, &uc);
+		if (ret)
+			dev_dbg(hba->dev,
+				"send uic cmd: error code %d\n", ret);
+
+		memcpy(&bsg_reply->upiu_rsp.uc, &uc, UIC_CMD_SIZE);
+
 		break;
 	default:
 		ret = -ENOTSUPP;

drivers/scsi/ufs/ufshcd.c

@@ -2059,8 +2059,7 @@ __ufshcd_send_uic_cmd(struct ufs_hba *hba, struct uic_command *uic_cmd,
  *
  * Returns 0 only if success.
  */
-static int
-ufshcd_send_uic_cmd(struct ufs_hba *hba, struct uic_command *uic_cmd)
+int ufshcd_send_uic_cmd(struct ufs_hba *hba, struct uic_command *uic_cmd)
 {
 	int ret;
 	unsigned long flags;

drivers/scsi/ufs/ufshcd.h

@@ -895,6 +895,8 @@ int ufshcd_map_desc_id_to_length(struct ufs_hba *hba, enum desc_idn desc_id,
 
 u32 ufshcd_get_local_unipro_ver(struct ufs_hba *hba);
 
+int ufshcd_send_uic_cmd(struct ufs_hba *hba, struct uic_command *uic_cmd);
+
 int ufshcd_exec_raw_upiu_cmd(struct ufs_hba *hba,
 			     struct utp_upiu_req *req_upiu,
 			     struct utp_upiu_req *rsp_upiu,

include/uapi/scsi/scsi_bsg_ufs.h

@@ -13,6 +13,9 @@
  */
 
 #define UFS_CDB_SIZE	16
+#define UPIU_TRANSACTION_UIC_CMD 0x1F
+/* uic commands are 4DW long, per UFSHCI V2.1 paragraph 5.6.1 */
+#define UIC_CMD_SIZE (sizeof(u32) * 4)
 
 /**
  * struct utp_upiu_header - UPIU header structure