[SCSI] lpfc 8.3.14: PCI fixes and enhancements
- Allow enabling MSI-X intterupts with fewer vectors than requested
by looking at the return value from pci_enable_msix.
- Implemented driver PCI AER error handling routines for supporting
AER error recovering on SLI4 devices.
- Remove redundant SLI_ACTIVE checks
Signed-off-by: Alex Iannicelli <alex.iannicelli@emulex.com>
Signed-off-by: James Smart <james.smart@emulex.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
diff --git a/drivers/scsi/lpfc/lpfc_init.c b/drivers/scsi/lpfc/lpfc_init.c
index 184e45f..08db674 100644
--- a/drivers/scsi/lpfc/lpfc_init.c
+++ b/drivers/scsi/lpfc/lpfc_init.c
@@ -7030,22 +7030,28 @@
static int
lpfc_sli4_enable_msix(struct lpfc_hba *phba)
{
- int rc, index;
+ int vectors, rc, index;
/* Set up MSI-X multi-message vectors */
for (index = 0; index < phba->sli4_hba.cfg_eqn; index++)
phba->sli4_hba.msix_entries[index].entry = index;
/* Configure MSI-X capability structure */
+ vectors = phba->sli4_hba.cfg_eqn;
+enable_msix_vectors:
rc = pci_enable_msix(phba->pcidev, phba->sli4_hba.msix_entries,
- phba->sli4_hba.cfg_eqn);
- if (rc) {
+ vectors);
+ if (rc > 1) {
+ vectors = rc;
+ goto enable_msix_vectors;
+ } else if (rc) {
lpfc_printf_log(phba, KERN_INFO, LOG_INIT,
"0484 PCI enable MSI-X failed (%d)\n", rc);
goto msi_fail_out;
}
+
/* Log MSI-X vector assignment */
- for (index = 0; index < phba->sli4_hba.cfg_eqn; index++)
+ for (index = 0; index < vectors; index++)
lpfc_printf_log(phba, KERN_INFO, LOG_INIT,
"0489 MSI-X entry[%d]: vector=x%x "
"message=%d\n", index,
@@ -7067,7 +7073,7 @@
}
/* The rest of the vector(s) are associated to fast-path handler(s) */
- for (index = 1; index < phba->sli4_hba.cfg_eqn; index++) {
+ for (index = 1; index < vectors; index++) {
phba->sli4_hba.fcp_eq_hdl[index - 1].idx = index - 1;
phba->sli4_hba.fcp_eq_hdl[index - 1].phba = phba;
rc = request_irq(phba->sli4_hba.msix_entries[index].vector,
@@ -7081,6 +7087,7 @@
goto cfg_fail_out;
}
}
+ phba->sli4_hba.msix_vec_nr = vectors;
return rc;
@@ -7114,9 +7121,10 @@
/* Free up MSI-X multi-message vectors */
free_irq(phba->sli4_hba.msix_entries[0].vector, phba);
- for (index = 1; index < phba->sli4_hba.cfg_eqn; index++)
+ for (index = 1; index < phba->sli4_hba.msix_vec_nr; index++)
free_irq(phba->sli4_hba.msix_entries[index].vector,
&phba->sli4_hba.fcp_eq_hdl[index - 1]);
+
/* Disable MSI-X */
pci_disable_msix(phba->pcidev);
@@ -7158,6 +7166,7 @@
pci_disable_msi(phba->pcidev);
lpfc_printf_log(phba, KERN_WARNING, LOG_INIT,
"0490 MSI request_irq failed (%d)\n", rc);
+ return rc;
}
for (index = 0; index < phba->cfg_fcp_eq_count; index++) {
@@ -7165,7 +7174,7 @@
phba->sli4_hba.fcp_eq_hdl[index].phba = phba;
}
- return rc;
+ return 0;
}
/**
@@ -7876,6 +7885,9 @@
lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
"2710 PCI channel disable preparing for reset\n");
+ /* Block any management I/Os to the device */
+ lpfc_block_mgmt_io(phba);
+
/* Block all SCSI devices' I/Os on the host */
lpfc_scsi_dev_block(phba);
@@ -7885,6 +7897,7 @@
/* Disable interrupt and pci device */
lpfc_sli_disable_intr(phba);
pci_disable_device(phba->pcidev);
+
/* Flush all driver's outstanding SCSI I/Os as we are to reset */
lpfc_sli_flush_fcp_rings(phba);
}
@@ -7898,7 +7911,7 @@
* pending I/Os.
**/
static void
-lpfc_prep_dev_for_perm_failure(struct lpfc_hba *phba)
+lpfc_sli_prep_dev_for_perm_failure(struct lpfc_hba *phba)
{
lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
"2711 PCI channel permanent disable for failure\n");
@@ -7947,7 +7960,7 @@
return PCI_ERS_RESULT_NEED_RESET;
case pci_channel_io_perm_failure:
/* Permanent failure, prepare for device down */
- lpfc_prep_dev_for_perm_failure(phba);
+ lpfc_sli_prep_dev_for_perm_failure(phba);
return PCI_ERS_RESULT_DISCONNECT;
default:
/* Unknown state, prepare and request slot reset */
@@ -8016,7 +8029,8 @@
} else
phba->intr_mode = intr_mode;
- /* Take device offline; this will perform cleanup */
+ /* Take device offline, it will perform cleanup */
+ lpfc_offline_prep(phba);
lpfc_offline(phba);
lpfc_sli_brdrestart(phba);
@@ -8201,6 +8215,8 @@
/* Default to single FCP EQ for non-MSI-X */
if (phba->intr_type != MSIX)
phba->cfg_fcp_eq_count = 1;
+ else if (phba->sli4_hba.msix_vec_nr < phba->cfg_fcp_eq_count)
+ phba->cfg_fcp_eq_count = phba->sli4_hba.msix_vec_nr - 1;
/* Set up SLI-4 HBA */
if (lpfc_sli4_hba_setup(phba)) {
lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
@@ -8362,7 +8378,7 @@
struct lpfc_hba *phba = ((struct lpfc_vport *)shost->hostdata)->phba;
lpfc_printf_log(phba, KERN_INFO, LOG_INIT,
- "0298 PCI device Power Management suspend.\n");
+ "2843 PCI device Power Management suspend.\n");
/* Bring down the device */
lpfc_offline_prep(phba);
@@ -8453,6 +8469,84 @@
}
/**
+ * lpfc_sli4_prep_dev_for_recover - Prepare SLI4 device for pci slot recover
+ * @phba: pointer to lpfc hba data structure.
+ *
+ * This routine is called to prepare the SLI4 device for PCI slot recover. It
+ * aborts all the outstanding SCSI I/Os to the pci device.
+ **/
+static void
+lpfc_sli4_prep_dev_for_recover(struct lpfc_hba *phba)
+{
+ struct lpfc_sli *psli = &phba->sli;
+ struct lpfc_sli_ring *pring;
+
+ lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
+ "2828 PCI channel I/O abort preparing for recovery\n");
+ /*
+ * There may be errored I/Os through HBA, abort all I/Os on txcmplq
+ * and let the SCSI mid-layer to retry them to recover.
+ */
+ pring = &psli->ring[psli->fcp_ring];
+ lpfc_sli_abort_iocb_ring(phba, pring);
+}
+
+/**
+ * lpfc_sli4_prep_dev_for_reset - Prepare SLI4 device for pci slot reset
+ * @phba: pointer to lpfc hba data structure.
+ *
+ * This routine is called to prepare the SLI4 device for PCI slot reset. It
+ * disables the device interrupt and pci device, and aborts the internal FCP
+ * pending I/Os.
+ **/
+static void
+lpfc_sli4_prep_dev_for_reset(struct lpfc_hba *phba)
+{
+ lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
+ "2826 PCI channel disable preparing for reset\n");
+
+ /* Block any management I/Os to the device */
+ lpfc_block_mgmt_io(phba);
+
+ /* Block all SCSI devices' I/Os on the host */
+ lpfc_scsi_dev_block(phba);
+
+ /* stop all timers */
+ lpfc_stop_hba_timers(phba);
+
+ /* Disable interrupt and pci device */
+ lpfc_sli4_disable_intr(phba);
+ pci_disable_device(phba->pcidev);
+
+ /* Flush all driver's outstanding SCSI I/Os as we are to reset */
+ lpfc_sli_flush_fcp_rings(phba);
+}
+
+/**
+ * lpfc_sli4_prep_dev_for_perm_failure - Prepare SLI4 dev for pci slot disable
+ * @phba: pointer to lpfc hba data structure.
+ *
+ * This routine is called to prepare the SLI4 device for PCI slot permanently
+ * disabling. It blocks the SCSI transport layer traffic and flushes the FCP
+ * pending I/Os.
+ **/
+static void
+lpfc_sli4_prep_dev_for_perm_failure(struct lpfc_hba *phba)
+{
+ lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
+ "2827 PCI channel permanent disable for failure\n");
+
+ /* Block all SCSI devices' I/Os on the host */
+ lpfc_scsi_dev_block(phba);
+
+ /* stop all timers */
+ lpfc_stop_hba_timers(phba);
+
+ /* Clean up all driver's outstanding SCSI I/Os */
+ lpfc_sli_flush_fcp_rings(phba);
+}
+
+/**
* lpfc_io_error_detected_s4 - Method for handling PCI I/O error to SLI-4 device
* @pdev: pointer to PCI device.
* @state: the current PCI connection state.
@@ -8471,7 +8565,29 @@
static pci_ers_result_t
lpfc_io_error_detected_s4(struct pci_dev *pdev, pci_channel_state_t state)
{
- return PCI_ERS_RESULT_NEED_RESET;
+ struct Scsi_Host *shost = pci_get_drvdata(pdev);
+ struct lpfc_hba *phba = ((struct lpfc_vport *)shost->hostdata)->phba;
+
+ switch (state) {
+ case pci_channel_io_normal:
+ /* Non-fatal error, prepare for recovery */
+ lpfc_sli4_prep_dev_for_recover(phba);
+ return PCI_ERS_RESULT_CAN_RECOVER;
+ case pci_channel_io_frozen:
+ /* Fatal error, prepare for slot reset */
+ lpfc_sli4_prep_dev_for_reset(phba);
+ return PCI_ERS_RESULT_NEED_RESET;
+ case pci_channel_io_perm_failure:
+ /* Permanent failure, prepare for device down */
+ lpfc_sli4_prep_dev_for_perm_failure(phba);
+ return PCI_ERS_RESULT_DISCONNECT;
+ default:
+ /* Unknown state, prepare and request slot reset */
+ lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
+ "2825 Unknown PCI error state: x%x\n", state);
+ lpfc_sli4_prep_dev_for_reset(phba);
+ return PCI_ERS_RESULT_NEED_RESET;
+ }
}
/**
@@ -8495,6 +8611,39 @@
static pci_ers_result_t
lpfc_io_slot_reset_s4(struct pci_dev *pdev)
{
+ struct Scsi_Host *shost = pci_get_drvdata(pdev);
+ struct lpfc_hba *phba = ((struct lpfc_vport *)shost->hostdata)->phba;
+ struct lpfc_sli *psli = &phba->sli;
+ uint32_t intr_mode;
+
+ dev_printk(KERN_INFO, &pdev->dev, "recovering from a slot reset.\n");
+ if (pci_enable_device_mem(pdev)) {
+ printk(KERN_ERR "lpfc: Cannot re-enable "
+ "PCI device after reset.\n");
+ return PCI_ERS_RESULT_DISCONNECT;
+ }
+
+ pci_restore_state(pdev);
+ if (pdev->is_busmaster)
+ pci_set_master(pdev);
+
+ spin_lock_irq(&phba->hbalock);
+ psli->sli_flag &= ~LPFC_SLI_ACTIVE;
+ spin_unlock_irq(&phba->hbalock);
+
+ /* Configure and enable interrupt */
+ intr_mode = lpfc_sli4_enable_intr(phba, phba->intr_mode);
+ if (intr_mode == LPFC_INTR_ERROR) {
+ lpfc_printf_log(phba, KERN_ERR, LOG_INIT,
+ "2824 Cannot re-enable interrupt after "
+ "slot reset.\n");
+ return PCI_ERS_RESULT_DISCONNECT;
+ } else
+ phba->intr_mode = intr_mode;
+
+ /* Log the current active interrupt mode */
+ lpfc_log_intr_mode(phba, phba->intr_mode);
+
return PCI_ERS_RESULT_RECOVERED;
}
@@ -8511,7 +8660,27 @@
static void
lpfc_io_resume_s4(struct pci_dev *pdev)
{
- return;
+ struct Scsi_Host *shost = pci_get_drvdata(pdev);
+ struct lpfc_hba *phba = ((struct lpfc_vport *)shost->hostdata)->phba;
+
+ /*
+ * In case of slot reset, as function reset is performed through
+ * mailbox command which needs DMA to be enabled, this operation
+ * has to be moved to the io resume phase. Taking device offline
+ * will perform the necessary cleanup.
+ */
+ if (!(phba->sli.sli_flag & LPFC_SLI_ACTIVE)) {
+ /* Perform device reset */
+ lpfc_offline_prep(phba);
+ lpfc_offline(phba);
+ lpfc_sli_brdrestart(phba);
+ /* Bring the device back online */
+ lpfc_online(phba);
+ }
+
+ /* Clean up Advanced Error Reporting (AER) if needed */
+ if (phba->hba_flag & HBA_AER_ENABLED)
+ pci_cleanup_aer_uncorrect_error_status(pdev);
}
/**