From: John Garry <john.garry@huawei.com>
Date: Wed, 24 Aug 2016 11:05:51 +0000 (+0800)
Subject: scsi: hisi_sas: add v2 hw slot complete internal abort support
X-Git-Tag: v4.9-rc1~95^2~108
X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=commitdiff_plain;h=df032d0e4dbe2597dfa3f60c06b1c260e3870a3d;p=linux.git

scsi: hisi_sas: add v2 hw slot complete internal abort support

Add code in slot_complete_v2_hw() to deal with the slots which have
completed due to internal abort.

The status codes have the following meaning:

- STAT_IO_ABORTED: the IO has been aborted due to internal abort,
  whether by device or individual abort command

- STAT_IO_COMPLETE: internal abort command has completed successfully
  for device or individual abort command

- STAT_IO_NO_DEVICE: internal abort command has completed for device but
  cannot find any IO

- STAT_IO_NOT_VALID: internal abort command has completed for single
  command but could not find the command

Signed-off-by: John Garry <john.garry@huawei.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
---

diff --git a/drivers/scsi/hisi_sas/hisi_sas_v2_hw.c b/drivers/scsi/hisi_sas/hisi_sas_v2_hw.c
index fec1675e572c..bf9b693a717f 100644
--- a/drivers/scsi/hisi_sas/hisi_sas_v2_hw.c
+++ b/drivers/scsi/hisi_sas/hisi_sas_v2_hw.c
@@ -227,6 +227,13 @@
 #define CMPLT_HDR_RSPNS_XFRD_MSK	(0x1 << CMPLT_HDR_RSPNS_XFRD_OFF)
 #define CMPLT_HDR_ERX_OFF		12
 #define CMPLT_HDR_ERX_MSK		(0x1 << CMPLT_HDR_ERX_OFF)
+#define CMPLT_HDR_ABORT_STAT_OFF	13
+#define CMPLT_HDR_ABORT_STAT_MSK	(0x7 << CMPLT_HDR_ABORT_STAT_OFF)
+/* abort_stat */
+#define STAT_IO_NOT_VALID		0x1
+#define STAT_IO_NO_DEVICE		0x2
+#define STAT_IO_COMPLETE		0x3
+#define STAT_IO_ABORTED			0x4
 /* dw1 */
 #define CMPLT_HDR_IPTT_OFF		0
 #define CMPLT_HDR_IPTT_MSK		(0xffff << CMPLT_HDR_IPTT_OFF)
@@ -1569,6 +1576,30 @@ slot_complete_v2_hw(struct hisi_hba *hisi_hba, struct hisi_sas_slot *slot,
 		goto out;
 	}
 
+	/* Use SAS+TMF status codes */
+	switch ((complete_hdr->dw0 & CMPLT_HDR_ABORT_STAT_MSK)
+			>> CMPLT_HDR_ABORT_STAT_OFF) {
+	case STAT_IO_ABORTED:
+		/* this io has been aborted by abort command */
+		ts->stat = SAS_ABORTED_TASK;
+		goto out;
+	case STAT_IO_COMPLETE:
+		/* internal abort command complete */
+		ts->stat = TMF_RESP_FUNC_COMPLETE;
+		goto out;
+	case STAT_IO_NO_DEVICE:
+		ts->stat = TMF_RESP_FUNC_COMPLETE;
+		goto out;
+	case STAT_IO_NOT_VALID:
+		/* abort single io, controller don't find
+		 * the io need to abort
+		 */
+		ts->stat = TMF_RESP_FUNC_FAILED;
+		goto out;
+	default:
+		break;
+	}
+
 	if ((complete_hdr->dw0 & CMPLT_HDR_ERX_MSK) &&
 		(!(complete_hdr->dw0 & CMPLT_HDR_RSPNS_XFRD_MSK))) {