diff mbox series

[25/42] lpfc: Fix hang when downloading fw on port enabled for nvme

Message ID 20190814235712.4487-26-jsmart2021@gmail.com (mailing list archive)
State Accepted
Headers show
Series lpfc: Update lpfc to revision 12.4.0.0 | expand

Commit Message

James Smart Aug. 14, 2019, 11:56 p.m. UTC 
As part of firmware download, the adapter is reset. On the adapter
the reset causes the function to stop and all outstanding io is
terminated (without responses). The reset path then starts
teardown of the adapter, starting with deregistration of the remote
ports with the nvme-fc transport. The local port is then deregistered
and the driver waits for local port deregistration. This never finishes.

The remote port deregistrations terminated the nvme controllers, causing
them to send aborts for all the outstanding io. The aborts were serviced
in the driver, but stalled due to its state. The nvme layer then stops
to reclaim it's outstanding io before continuing.  The io must be
returned before the reset on the controller is deemed complete and the
controller delete performed.  The remote port deregistration won't
complete until all the controllers are terminated. And the local port
deregistration won't complete until all controllers and remote ports
are terminated. Thus things hang.

The issue is the reset which stopped the adapter also stopped all the
responses that would drive i/o completions, and the aborts were also
stopped that stopped i/o completions. The driver, when resetting the
adapter like this, needs to be generating the completions as part of
the adapter reset so that I/O complete (in error), and any aborts
are not queued.

Fix by adding flush routines whenever the adapter port has been reset
or discovered in error. The flush routines will generate the completions
for the scsi and nvme outstanding io. The abort ios, if waiting, will
be caught and flushed as well.

Signed-off-by: Dick Kennedy <dick.kennedy@broadcom.com>
Signed-off-by: James Smart <jsmart2021@gmail.com>
---
 drivers/scsi/lpfc/lpfc_crtn.h |  1 +
 drivers/scsi/lpfc/lpfc_init.c |  4 ++++
 drivers/scsi/lpfc/lpfc_nvme.c | 47 +++++++++++++++++++++++++++++++++++++++++++
 drivers/scsi/lpfc/lpfc_sli.c  |  9 ++++++---
 4 files changed, 58 insertions(+), 3 deletions(-)
diff mbox series

Patch

diff --git a/drivers/scsi/lpfc/lpfc_crtn.h b/drivers/scsi/lpfc/lpfc_crtn.h
index 68e9f96242d3..bee27bb7123c 100644
--- a/drivers/scsi/lpfc/lpfc_crtn.h
+++ b/drivers/scsi/lpfc/lpfc_crtn.h
@@ -595,6 +595,7 @@  void lpfc_release_io_buf(struct lpfc_hba *phba, struct lpfc_io_buf *ncmd,
 			 struct lpfc_sli4_hdw_queue *qp);
 void lpfc_nvme_cmd_template(void);
 void lpfc_nvmet_cmd_template(void);
+void lpfc_nvme_cancel_iocb(struct lpfc_hba *phba, struct lpfc_iocbq *pwqeIn);
 extern int lpfc_enable_nvmet_cnt;
 extern unsigned long long lpfc_enable_nvmet[];
 extern int lpfc_no_hba_reset_cnt;
diff --git a/drivers/scsi/lpfc/lpfc_init.c b/drivers/scsi/lpfc/lpfc_init.c
index c580d512a3db..98db1f7e536e 100644
--- a/drivers/scsi/lpfc/lpfc_init.c
+++ b/drivers/scsi/lpfc/lpfc_init.c
@@ -1546,6 +1546,8 @@  lpfc_sli4_offline_eratt(struct lpfc_hba *phba)
 	spin_unlock_irq(&phba->hbalock);
 
 	lpfc_offline_prep(phba, LPFC_MBX_NO_WAIT);
+	lpfc_sli_flush_fcp_rings(phba);
+	lpfc_sli_flush_nvme_rings(phba);
 	lpfc_offline(phba);
 	lpfc_hba_down_post(phba);
 	lpfc_unblock_mgmt_io(phba);
@@ -1807,6 +1809,8 @@  lpfc_sli4_port_sta_fn_reset(struct lpfc_hba *phba, int mbx_action,
 				"2887 Reset Needed: Attempting Port "
 				"Recovery...\n");
 	lpfc_offline_prep(phba, mbx_action);
+	lpfc_sli_flush_fcp_rings(phba);
+	lpfc_sli_flush_nvme_rings(phba);
 	lpfc_offline(phba);
 	/* release interrupt for possible resource change */
 	lpfc_sli4_disable_intr(phba);
diff --git a/drivers/scsi/lpfc/lpfc_nvme.c b/drivers/scsi/lpfc/lpfc_nvme.c
index 103708503592..c7f5b50c3820 100644
--- a/drivers/scsi/lpfc/lpfc_nvme.c
+++ b/drivers/scsi/lpfc/lpfc_nvme.c
@@ -2668,3 +2668,50 @@  lpfc_nvme_wait_for_io_drain(struct lpfc_hba *phba)
 		}
 	}
 }
+
+void
+lpfc_nvme_cancel_iocb(struct lpfc_hba *phba, struct lpfc_iocbq *pwqeIn)
+{
+#if (IS_ENABLED(CONFIG_NVME_FC))
+	struct lpfc_io_buf *lpfc_ncmd;
+	struct nvmefc_fcp_req *nCmd;
+	struct lpfc_nvme_fcpreq_priv *freqpriv;
+
+	if (!pwqeIn->context1) {
+		lpfc_sli_release_iocbq(phba, pwqeIn);
+		return;
+	}
+	/* For abort iocb just return, IO iocb will do a done call */
+	if (bf_get(wqe_cmnd, &pwqeIn->wqe.gen_req.wqe_com) ==
+	    CMD_ABORT_XRI_CX) {
+		lpfc_sli_release_iocbq(phba, pwqeIn);
+		return;
+	}
+	lpfc_ncmd = (struct lpfc_io_buf *)pwqeIn->context1;
+
+	spin_lock(&lpfc_ncmd->buf_lock);
+	if (!lpfc_ncmd->nvmeCmd) {
+		spin_unlock(&lpfc_ncmd->buf_lock);
+		lpfc_release_nvme_buf(phba, lpfc_ncmd);
+		return;
+	}
+
+	nCmd = lpfc_ncmd->nvmeCmd;
+	lpfc_printf_log(phba, KERN_INFO, LOG_NVME_IOERR,
+			"6194 NVME Cancel xri %x\n",
+			lpfc_ncmd->cur_iocbq.sli4_xritag);
+
+	nCmd->transferred_length = 0;
+	nCmd->rcv_rsplen = 0;
+	nCmd->status = NVME_SC_INTERNAL;
+	freqpriv = nCmd->private;
+	freqpriv->nvme_buf = NULL;
+	lpfc_ncmd->nvmeCmd = NULL;
+
+	spin_unlock(&lpfc_ncmd->buf_lock);
+	nCmd->done(nCmd);
+
+	/* Call release with XB=1 to queue the IO into the abort list. */
+	lpfc_release_nvme_buf(phba, lpfc_ncmd);
+#endif
+}
diff --git a/drivers/scsi/lpfc/lpfc_sli.c b/drivers/scsi/lpfc/lpfc_sli.c
index ca6988ae8924..6ac6620aab00 100644
--- a/drivers/scsi/lpfc/lpfc_sli.c
+++ b/drivers/scsi/lpfc/lpfc_sli.c
@@ -1391,9 +1391,12 @@  lpfc_sli_cancel_iocbs(struct lpfc_hba *phba, struct list_head *iocblist,
 
 	while (!list_empty(iocblist)) {
 		list_remove_head(iocblist, piocb, struct lpfc_iocbq, list);
-		if (!piocb->iocb_cmpl)
-			lpfc_sli_release_iocbq(phba, piocb);
-		else {
+		if (!piocb->iocb_cmpl) {
+			if (piocb->iocb_flag & LPFC_IO_NVME)
+				lpfc_nvme_cancel_iocb(phba, piocb);
+			else
+				lpfc_sli_release_iocbq(phba, piocb);
+		} else {
 			piocb->iocb.ulpStatus = ulpstatus;
 			piocb->iocb.un.ulpWord[4] = ulpWord4;
 			(piocb->iocb_cmpl) (phba, piocb, piocb);