[PATCH 5.10 380/717] scsi: qla2xxx: Fix N2N and NVMe connect retry failure

Greg Kroah-Hartman
2020-12-28T14:52:01Z

From: Quinn Tran <qutran@marvell.com>

[ Upstream commit 07a5f69248e3486e387c40af64793466371c7d91 ]

FC-NVMe target discovery failed when initiator wwpn < target wwpn in an N2N
(Direct Attach) config, where the driver was stuck on FCP PRLI mode and
failed to retry with NVMe PRLI.

Link: https://lore.kernel.org/r/20201202132312.19966-10-njavali@marvell.com
Fixes: 84ed362ac40c ("scsi: qla2xxx: Dual FCP-NVMe target port support”)
Fixes: 983f127603fa ("scsi: qla2xxx: Retry PLOGI on FC-NVMe PRLI failure”)
Signed-off-by: Quinn Tran <qutran@marvell.com>
Signed-off-by: Nilesh Javali <njavali@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/scsi/qla2xxx/qla_init.c | 71 ++++++++++++++++++++++++---------
drivers/scsi/qla2xxx/qla_mbx.c | 3 --
2 files changed, 52 insertions(+), 22 deletions(-)

diff --git a/drivers/scsi/qla2xxx/qla_init.c b/drivers/scsi/qla2xxx/qla_init.c
index 898c70b8ebbf6..52e8b555bd1dc 100644
--- a/drivers/scsi/qla2xxx/qla_init.c
+++ b/drivers/scsi/qla2xxx/qla_init.c
@@ -1268,9 +1268,10 @@ qla24xx_async_prli(struct scsi_qla_host *vha, fc_port_t *fcport)
lio->u.logio.flags |= SRB_LOGIN_NVME_PRLI;

ql_dbg(ql_dbg_disc, vha, 0x211b,
- "Async-prli - %8phC hdl=%x, loopid=%x portid=%06x retries=%d %s.\n",
+ "Async-prli - %8phC hdl=%x, loopid=%x portid=%06x retries=%d fc4type %x priority %x %s.\n",
fcport->port_name, sp->handle, fcport->loop_id, fcport->d_id.b24,
- fcport->login_retry, NVME_TARGET(vha->hw, fcport) ? "nvme" : "fc");
+ fcport->login_retry, fcport->fc4_type, vha->hw->fc4_type_priority,
+ NVME_TARGET(vha->hw, fcport) ? "nvme" : "fcp");

rval = qla2x00_start_sp(sp);
if (rval != QLA_SUCCESS) {
@@ -1932,26 +1933,58 @@ qla24xx_handle_prli_done_event(struct scsi_qla_host *vha, struct event_arg *ea)
break;
}

- /*
- * Retry PRLI with other FC-4 type if failure occurred on dual
- * FCP/NVMe port
- */
- if (NVME_FCP_TARGET(ea->fcport)) {
- ql_dbg(ql_dbg_disc, vha, 0x2118,
- "%s %d %8phC post %s prli\n",
- __func__, __LINE__, ea->fcport->port_name,
- (ea->fcport->fc4_type & FS_FC4TYPE_NVME) ?
- "NVMe" : "FCP");
- if (vha->hw->fc4_type_priority == FC4_PRIORITY_NVME)
+ ql_dbg(ql_dbg_disc, vha, 0x2118,
+ "%s %d %8phC priority %s, fc4type %x\n",
+ __func__, __LINE__, ea->fcport->port_name,
+ vha->hw->fc4_type_priority == FC4_PRIORITY_FCP ?
+ "FCP" : "NVMe", ea->fcport->fc4_type);
+
+ if (N2N_TOPO(vha->hw)) {
+ if (vha->hw->fc4_type_priority == FC4_PRIORITY_NVME) {
ea->fcport->fc4_type &= ~FS_FC4TYPE_NVME;
- else
+ ea->fcport->fc4_type |= FS_FC4TYPE_FCP;
+ } else {
ea->fcport->fc4_type &= ~FS_FC4TYPE_FCP;
- }
+ ea->fcport->fc4_type |= FS_FC4TYPE_NVME;
+ }

- ea->fcport->flags &= ~FCF_ASYNC_SENT;
- ea->fcport->keep_nport_handle = 0;
- ea->fcport->logout_on_delete = 1;
- qlt_schedule_sess_for_deletion(ea->fcport);
+ if (ea->fcport->n2n_link_reset_cnt < 3) {
+ ea->fcport->n2n_link_reset_cnt++;
+ vha->relogin_jif = jiffies + 2 * HZ;
+ /*
+ * PRLI failed. Reset link to kick start
+ * state machine
+ */
+ set_bit(N2N_LINK_RESET, &vha->dpc_flags);
+ } else {
+ ql_log(ql_log_warn, vha, 0x2119,
+ "%s %d %8phC Unable to reconnect\n",
+ __func__, __LINE__,
+ ea->fcport->port_name);
+ }
+ } else {
+ /*
+ * switch connect. login failed. Take connection down
+ * and allow relogin to retrigger
+ */
+ if (NVME_FCP_TARGET(ea->fcport)) {
+ ql_dbg(ql_dbg_disc, vha, 0x2118,
+ "%s %d %8phC post %s prli\n",
+ __func__, __LINE__,
+ ea->fcport->port_name,
+ (ea->fcport->fc4_type & FS_FC4TYPE_NVME)
+ ? "NVMe" : "FCP");
+ if (vha->hw->fc4_type_priority == FC4_PRIORITY_NVME)
+ ea->fcport->fc4_type &= ~FS_FC4TYPE_NVME;
+ else
+ ea->fcport->fc4_type &= ~FS_FC4TYPE_FCP;
+ }
+
+ ea->fcport->flags &= ~FCF_ASYNC_SENT;
+ ea->fcport->keep_nport_handle = 0;
+ ea->fcport->logout_on_delete = 1;
+ qlt_schedule_sess_for_deletion(ea->fcport);
+ }
break;
}
}
diff --git a/drivers/scsi/qla2xxx/qla_mbx.c b/drivers/scsi/qla2xxx/qla_mbx.c
index bef871a890281..d6325fb2ef73b 100644
--- a/drivers/scsi/qla2xxx/qla_mbx.c
+++ b/drivers/scsi/qla2xxx/qla_mbx.c
@@ -3998,9 +3998,6 @@ qla24xx_report_id_acquisition(scsi_qla_host_t *vha,
fcport->scan_state = QLA_FCPORT_FOUND;
fcport->n2n_flag = 1;
fcport->keep_nport_handle = 1;
- fcport->fc4_type = FS_FC4TYPE_FCP;
- if (vha->flags.nvme_enabled)
- fcport->fc4_type |= FS_FC4TYPE_NVME;

if (wwn_to_u64(vha->port_name) >
wwn_to_u64(fcport->port_name)) {
--
2.27.0