[SCSI] lpfc 8.2.8 : Add support for PCI-EEH permanent disabling

Add support for PCI-EEH permanent-disabling a device via lpfc_pci_remove_one()

Signed-off-by: James Smart <james.smart@emulex.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>

5 files changed, 103 insertions, 3 deletions

diff --git a/drivers/scsi/lpfc/lpfc_crtn.h b/drivers/scsi/lpfc/lpfc_crtn.h
index 189ce9f8a7b1..495afd06936b 100644
--- a/drivers/scsi/lpfc/lpfc_crtn.h
+++ b/drivers/scsi/lpfc/lpfc_crtn.h
@@ -199,6 +199,7 @@ int lpfc_sli_issue_iocb(struct lpfc_hba *, struct lpfc_sli_ring *,
                         struct lpfc_iocbq *, uint32_t);
 void lpfc_sli_pcimem_bcopy(void *, void *, uint32_t);
 void lpfc_sli_abort_iocb_ring(struct lpfc_hba *, struct lpfc_sli_ring *);
+void lpfc_sli_flush_fcp_rings(struct lpfc_hba *);
 int lpfc_sli_ringpostbuf_put(struct lpfc_hba *, struct lpfc_sli_ring *,
                              struct lpfc_dmabuf *);
 struct lpfc_dmabuf *lpfc_sli_ringpostbuf_get(struct lpfc_hba *,
@@ -290,6 +291,7 @@ void lpfc_unblock_fabric_iocbs(struct lpfc_hba *);
 void lpfc_adjust_queue_depth(struct lpfc_hba *);
 void lpfc_ramp_down_queue_handler(struct lpfc_hba *);
 void lpfc_ramp_up_queue_handler(struct lpfc_hba *);
+void lpfc_scsi_dev_block(struct lpfc_hba *);
 
 #define ScsiResult(host_code, scsi_code) (((host_code) << 16) | scsi_code)
 #define HBA_EVENT_RSCN                   5
diff --git a/drivers/scsi/lpfc/lpfc_hbadisc.c b/drivers/scsi/lpfc/lpfc_hbadisc.c
index b4ef83623532..897ef7d7a8e9 100644
--- a/drivers/scsi/lpfc/lpfc_hbadisc.c
+++ b/drivers/scsi/lpfc/lpfc_hbadisc.c
@@ -237,8 +237,6 @@ lpfc_dev_loss_tmo_handler(struct lpfc_nodelist *ndlp)
                 lpfc_sli_abort_iocb(vport, &phba->sli.ring[phba->sli.fcp_ring],
                                     ndlp->nlp_sid, 0, LPFC_CTX_TGT);
         }
-        if (vport->load_flag & FC_UNLOADING)
-                warn_on = 0;
 
         if (warn_on) {
                 lpfc_printf_vlog(vport, KERN_ERR, LOG_DISCOVERY,
diff --git a/drivers/scsi/lpfc/lpfc_init.c b/drivers/scsi/lpfc/lpfc_init.c
index 41a8c13e6950..333166b17908 100644
--- a/drivers/scsi/lpfc/lpfc_init.c
+++ b/drivers/scsi/lpfc/lpfc_init.c
@@ -2661,8 +2661,15 @@ static pci_ers_result_t lpfc_io_error_detected(struct pci_dev *pdev,
         struct lpfc_sli *psli = &phba->sli;
         struct lpfc_sli_ring  *pring;
 
-        if (state == pci_channel_io_perm_failure)
+        if (state == pci_channel_io_perm_failure) {
+                lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
+                                "0472 PCI channel I/O permanent failure\n");
+                /* Block all SCSI devices' I/Os on the host */
+                lpfc_scsi_dev_block(phba);
+                /* Clean up all driver's outstanding SCSI I/Os */
+                lpfc_sli_flush_fcp_rings(phba);
                 return PCI_ERS_RESULT_DISCONNECT;
+        }
 
         pci_disable_device(pdev);
         /*
diff --git a/drivers/scsi/lpfc/lpfc_scsi.c b/drivers/scsi/lpfc/lpfc_scsi.c
index b73968b2b8b4..3606b7098fc1 100644
--- a/drivers/scsi/lpfc/lpfc_scsi.c
+++ b/drivers/scsi/lpfc/lpfc_scsi.c
@@ -183,6 +183,35 @@ lpfc_ramp_up_queue_handler(struct lpfc_hba *phba)
         atomic_set(&phba->num_cmd_success, 0);
 }
 
+/**
+ * lpfc_scsi_dev_block: set all scsi hosts to block state.
+ * @phba: Pointer to HBA context object.
+ *
+ * This function walks vport list and set each SCSI host to block state
+ * by invoking fc_remote_port_delete() routine. This function is invoked
+ * with EEH when device's PCI slot has been permanently disabled.
+ **/
+void
+lpfc_scsi_dev_block(struct lpfc_hba *phba)
+{
+        struct lpfc_vport **vports;
+        struct Scsi_Host  *shost;
+        struct scsi_device *sdev;
+        struct fc_rport *rport;
+        int i;
+
+        vports = lpfc_create_vport_work_array(phba);
+        if (vports != NULL)
+                for (i = 0; i <= phba->max_vpi && vports[i] != NULL; i++) {
+                        shost = lpfc_shost_from_vport(vports[i]);
+                        shost_for_each_device(sdev, shost) {
+                                rport = starget_to_rport(scsi_target(sdev));
+                                fc_remote_port_delete(rport);
+                        }
+                }
+        lpfc_destroy_vport_work_array(phba, vports);
+}
+
 /*
  * This routine allocates a scsi buffer, which contains all the necessary
  * information needed to initiate a SCSI I/O.  The non-DMAable buffer region
diff --git a/drivers/scsi/lpfc/lpfc_sli.c b/drivers/scsi/lpfc/lpfc_sli.c
index 857bc0a57c47..1812e18246d5 100644
--- a/drivers/scsi/lpfc/lpfc_sli.c
+++ b/drivers/scsi/lpfc/lpfc_sli.c
@@ -2377,6 +2377,70 @@ lpfc_sli_abort_iocb_ring(struct lpfc_hba *phba, struct lpfc_sli_ring *pring)
 }
 
 /**
+ * lpfc_sli_flush_fcp_rings: flush all iocbs in the fcp ring.
+ * @phba: Pointer to HBA context object.
+ *
+ * This function flushes all iocbs in the fcp ring and frees all the iocb
+ * objects in txq and txcmplq. This function will not issue abort iocbs
+ * for all the iocb commands in txcmplq, they will just be returned with
+ * IOERR_SLI_DOWN. This function is invoked with EEH when device's PCI
+ * slot has been permanently disabled.
+ **/
+void
+lpfc_sli_flush_fcp_rings(struct lpfc_hba *phba)
+{
+        LIST_HEAD(txq);
+        LIST_HEAD(txcmplq);
+        struct lpfc_iocbq *iocb;
+        IOCB_t *cmd = NULL;
+        struct lpfc_sli *psli = &phba->sli;
+        struct lpfc_sli_ring  *pring;
+
+        /* Currently, only one fcp ring */
+        pring = &psli->ring[psli->fcp_ring];
+
+        spin_lock_irq(&phba->hbalock);
+        /* Retrieve everything on txq */
+        list_splice_init(&pring->txq, &txq);
+        pring->txq_cnt = 0;
+
+        /* Retrieve everything on the txcmplq */
+        list_splice_init(&pring->txcmplq, &txcmplq);
+        pring->txcmplq_cnt = 0;
+        spin_unlock_irq(&phba->hbalock);
+
+        /* Flush the txq */
+        while (!list_empty(&txq)) {
+                iocb = list_get_first(&txq, struct lpfc_iocbq, list);
+                cmd = &iocb->iocb;
+                list_del_init(&iocb->list);
+
+                if (!iocb->iocb_cmpl)
+                        lpfc_sli_release_iocbq(phba, iocb);
+                else {
+                        cmd->ulpStatus = IOSTAT_LOCAL_REJECT;
+                        cmd->un.ulpWord[4] = IOERR_SLI_DOWN;
+                        (iocb->iocb_cmpl) (phba, iocb, iocb);
+                }
+        }
+
+        /* Flush the txcmpq */
+        while (!list_empty(&txcmplq)) {
+                iocb = list_get_first(&txcmplq, struct lpfc_iocbq, list);
+                cmd = &iocb->iocb;
+                list_del_init(&iocb->list);
+
+                if (!iocb->iocb_cmpl)
+                        lpfc_sli_release_iocbq(phba, iocb);
+                else {
+                        cmd->ulpStatus = IOSTAT_LOCAL_REJECT;
+                        cmd->un.ulpWord[4] = IOERR_SLI_DOWN;
+                        (iocb->iocb_cmpl) (phba, iocb, iocb);
+                }
+        }
+}
+
+/**
  * lpfc_sli_brdready: Check for host status bits.
  * @phba: Pointer to HBA context object.
  * @mask: Bit mask to be checked.