scsi: qla2xxx: Fix command flush during TMF

commit da7c21b72aa86e990af5f73bce6590b8d8d148d0 upstream.

For each TMF request, driver iterates through each qpair and flushes
commands associated to the TMF. At the end of the qpair flush, a Marker is
used to complete the flush transaction. This process was repeated for each
qpair. The multiple flush and marker for this TMF request seems to cause
confusion for FW.

Instead, 1 flush is sent to FW. Driver would wait for FW to go through all
the I/Os on each qpair to be read then return. Driver then closes out the
transaction with a Marker.

Cc: stable@vger.kernel.org
Fixes: d90171dd0da5 ("scsi: qla2xxx: Multi-que support for TMF")
Signed-off-by: Quinn Tran <qutran@marvell.com>
Signed-off-by: Nilesh Javali <njavali@marvell.com>
Link: https://lore.kernel.org/r/20230714070104.40052-5-njavali@marvell.com
Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

3 files changed, 45 insertions, 39 deletions

diff --git a/drivers/scsi/qla2xxx/qla_init.c b/drivers/scsi/qla2xxx/qla_init.c
index bc04d8a9d7c4..fa14e944f83c 100644
--- a/drivers/scsi/qla2xxx/qla_init.c
+++ b/drivers/scsi/qla2xxx/qla_init.c
@@ -2004,12 +2004,11 @@ qla2x00_tmf_iocb_timeout(void *data)
 	int rc, h;
 	unsigned long flags;
 
-	if (sp->type == SRB_MARKER) {
-		complete(&tmf->u.tmf.comp);
-		return;
-	}
+	if (sp->type == SRB_MARKER)
+		rc = QLA_FUNCTION_FAILED;
+	else
+		rc = qla24xx_async_abort_cmd(sp, false);
 
-	rc = qla24xx_async_abort_cmd(sp, false);
 	if (rc) {
 		spin_lock_irqsave(sp->qpair->qp_lock_ptr, flags);
 		for (h = 1; h < sp->qpair->req->num_outstanding_cmds; h++) {
@@ -2131,6 +2130,17 @@ static void qla2x00_tmf_sp_done(srb_t *sp, int res)
 	complete(&tmf->u.tmf.comp);
 }
 
+static int qla_tmf_wait(struct tmf_arg *arg)
+{
+	/* there are only 2 types of error handling that reaches here, lun or target reset */
+	if (arg->flags & (TCF_LUN_RESET | TCF_ABORT_TASK_SET | TCF_CLEAR_TASK_SET))
+		return qla2x00_eh_wait_for_pending_commands(arg->vha,
+		    arg->fcport->d_id.b24, arg->lun, WAIT_LUN);
+	else
+		return qla2x00_eh_wait_for_pending_commands(arg->vha,
+		    arg->fcport->d_id.b24, arg->lun, WAIT_TARGET);
+}
+
 static int
 __qla2x00_async_tm_cmd(struct tmf_arg *arg)
 {
@@ -2138,8 +2148,9 @@ __qla2x00_async_tm_cmd(struct tmf_arg *arg)
 	struct srb_iocb *tm_iocb;
 	srb_t *sp;
 	int rval = QLA_FUNCTION_FAILED;
-
 	fc_port_t *fcport = arg->fcport;
+	u32 chip_gen, login_gen;
+	u64 jif;
 
 	if (TMF_NOT_READY(arg->fcport)) {
 		ql_dbg(ql_dbg_taskm, vha, 0x8032,
@@ -2184,8 +2195,27 @@ __qla2x00_async_tm_cmd(struct tmf_arg *arg)
 		    "TM IOCB failed (%x).\n", rval);
 	}
 
-	if (!test_bit(UNLOADING, &vha->dpc_flags) && !IS_QLAFX00(vha->hw))
-		rval = qla26xx_marker(arg);
+	if (!test_bit(UNLOADING, &vha->dpc_flags) && !IS_QLAFX00(vha->hw)) {
+		chip_gen = vha->hw->chip_reset;
+		login_gen = fcport->login_gen;
+
+		jif = jiffies;
+		if (qla_tmf_wait(arg)) {
+			ql_log(ql_log_info, vha, 0x803e,
+			       "Waited %u ms Nexus=%ld:%06x:%llu.\n",
+			       jiffies_to_msecs(jiffies - jif), vha->host_no,
+			       fcport->d_id.b24, arg->lun);
+		}
+
+		if (chip_gen == vha->hw->chip_reset && login_gen == fcport->login_gen) {
+			rval = qla26xx_marker(arg);
+		} else {
+			ql_log(ql_log_info, vha, 0x803e,
+			       "Skip Marker due to disruption. Nexus=%ld:%06x:%llu.\n",
+			       vha->host_no, fcport->d_id.b24, arg->lun);
+			rval = QLA_FUNCTION_FAILED;
+		}
+	}
 
 done_free_sp:
 	/* ref: INIT */
@@ -2263,9 +2293,8 @@ qla2x00_async_tm_cmd(fc_port_t *fcport, uint32_t flags, uint64_t lun,
 		     uint32_t tag)
 {
 	struct scsi_qla_host *vha = fcport->vha;
-	struct qla_qpair *qpair;
 	struct tmf_arg a;
-	int i, rval = QLA_SUCCESS;
+	int rval = QLA_SUCCESS;
 
 	if (TMF_NOT_READY(fcport))
 		return QLA_SUSPENDED;
@@ -2285,34 +2314,9 @@ qla2x00_async_tm_cmd(fc_port_t *fcport, uint32_t flags, uint64_t lun,
 	if (qla_get_tmf(&a))
 		return QLA_FUNCTION_FAILED;
 
-	if (vha->hw->mqenable) {
-		for (i = 0; i < vha->hw->num_qpairs; i++) {
-			qpair = vha->hw->queue_pair_map[i];
-			if (!qpair)
-				continue;
-
-			if (TMF_NOT_READY(fcport)) {
-				ql_log(ql_log_warn, vha, 0x8026,
-				    "Unable to send TM due to disruption.\n");
-				rval = QLA_SUSPENDED;
-				break;
-			}
-
-			a.qpair = qpair;
-			a.flags = flags|TCF_NOTMCMD_TO_TARGET;
-			rval = __qla2x00_async_tm_cmd(&a);
-			if (rval)
-				break;
-		}
-	}
-
-	if (rval)
-		goto bailout;
-
 	a.qpair = vha->hw->base_qpair;
 	rval = __qla2x00_async_tm_cmd(&a);
 
-bailout:
 	qla_put_tmf(&a);
 	return rval;
 }
diff --git a/drivers/scsi/qla2xxx/qla_iocb.c b/drivers/scsi/qla2xxx/qla_iocb.c
index c9a686f06d29..9e524d52dc86 100644
--- a/drivers/scsi/qla2xxx/qla_iocb.c
+++ b/drivers/scsi/qla2xxx/qla_iocb.c
@@ -3887,6 +3887,7 @@ qla_marker_iocb(srb_t *sp, struct mrk_entry_24xx *mrk)
 {
 	mrk->entry_type = MARKER_TYPE;
 	mrk->modifier = sp->u.iocb_cmd.u.tmf.modifier;
+	mrk->handle = make_handle(sp->qpair->req->id, sp->handle);
 	if (sp->u.iocb_cmd.u.tmf.modifier != MK_SYNC_ALL) {
 		mrk->nport_handle = cpu_to_le16(sp->u.iocb_cmd.u.tmf.loop_id);
 		int_to_scsilun(sp->u.iocb_cmd.u.tmf.lun, (struct scsi_lun *)&mrk->lun);
diff --git a/drivers/scsi/qla2xxx/qla_os.c b/drivers/scsi/qla2xxx/qla_os.c
index c86418af730e..f9f302e70fc5 100644
--- a/drivers/scsi/qla2xxx/qla_os.c
+++ b/drivers/scsi/qla2xxx/qla_os.c
@@ -1470,8 +1470,9 @@ qla2xxx_eh_device_reset(struct scsi_cmnd *cmd)
 		goto eh_reset_failed;
 	}
 	err = 3;
-	if (qla2x00_eh_wait_for_pending_commands(vha, sdev->id,
-	    sdev->lun, WAIT_LUN) != QLA_SUCCESS) {
+	if (qla2x00_eh_wait_for_pending_commands(vha, fcport->d_id.b24,
+						 cmd->device->lun,
+						 WAIT_LUN) != QLA_SUCCESS) {
 		ql_log(ql_log_warn, vha, 0x800d,
 		    "wait for pending cmds failed for cmd=%p.\n", cmd);
 		goto eh_reset_failed;
@@ -1537,8 +1538,8 @@ qla2xxx_eh_target_reset(struct scsi_cmnd *cmd)
 		goto eh_reset_failed;
 	}
 	err = 3;
-	if (qla2x00_eh_wait_for_pending_commands(vha, sdev->id,
-	    0, WAIT_TARGET) != QLA_SUCCESS) {
+	if (qla2x00_eh_wait_for_pending_commands(vha, fcport->d_id.b24, 0,
+						 WAIT_TARGET) != QLA_SUCCESS) {
 		ql_log(ql_log_warn, vha, 0x800d,
 		    "wait for pending cmds failed for cmd=%p.\n", cmd);
 		goto eh_reset_failed;