Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=8d63f375051bfb1506fa546db840af8510d1cd60
Commit: 8d63f375051bfb1506fa546db840af8510d1cd60
Parent: 4520b0089b41151ab3cc3ae1ee92d0aa19d88aae
Author: Linas Vepstas <[EMAIL PROTECTED]>
AuthorDate: Wed Feb 14 14:28:36 2007 -0600
Committer: James Bottomley <[EMAIL PROTECTED]>
CommitDate: Fri Feb 16 09:42:38 2007 -0600
[SCSI] lpfc: add PCI error recovery support
This patch adds PCI Error recovery support to the
Emulex Lightpulse Fibrechannel (lpfc) SCSI device driver.
Lightly tested at this point, works.
Signed-off-by: Linas Vepstas <[EMAIL PROTECTED]>
Acked-by: [EMAIL PROTECTED]
Acked-by: James Smart <[EMAIL PROTECTED]>
Signed-off-by: James Bottomley <[EMAIL PROTECTED]>
---
drivers/scsi/lpfc/lpfc_init.c | 97 +++++++++++++++++++++++++++++++++++++++++
drivers/scsi/lpfc/lpfc_sli.c | 12 +++++
2 files changed, 109 insertions(+), 0 deletions(-)
diff --git a/drivers/scsi/lpfc/lpfc_init.c b/drivers/scsi/lpfc/lpfc_init.c
index afca45c..9d014e5 100644
--- a/drivers/scsi/lpfc/lpfc_init.c
+++ b/drivers/scsi/lpfc/lpfc_init.c
@@ -518,6 +518,10 @@ lpfc_handle_eratt(struct lpfc_hba * phba)
struct lpfc_sli *psli = &phba->sli;
struct lpfc_sli_ring *pring;
uint32_t event_data;
+ /* If the pci channel is offline, ignore possible errors,
+ * since we cannot communicate with the pci card anyway. */
+ if (pci_channel_offline(phba->pcidev))
+ return;
if (phba->work_hs & HS_FFER6 ||
phba->work_hs & HS_FFER5) {
@@ -1797,6 +1801,92 @@ lpfc_pci_remove_one(struct pci_dev *pdev)
pci_set_drvdata(pdev, NULL);
}
+/**
+ * lpfc_io_error_detected - called when PCI error is detected
+ * @pdev: Pointer to PCI device
+ * @state: The current pci conneection state
+ *
+ * This function is called after a PCI bus error affecting
+ * this device has been detected.
+ */
+static pci_ers_result_t lpfc_io_error_detected(struct pci_dev *pdev,
+ pci_channel_state_t state)
+{
+ struct Scsi_Host *host = pci_get_drvdata(pdev);
+ struct lpfc_hba *phba = (struct lpfc_hba *)host->hostdata;
+ struct lpfc_sli *psli = &phba->sli;
+ struct lpfc_sli_ring *pring;
+
+ if (state == pci_channel_io_perm_failure) {
+ lpfc_pci_remove_one(pdev);
+ return PCI_ERS_RESULT_DISCONNECT;
+ }
+ pci_disable_device(pdev);
+ /*
+ * There may be I/Os dropped by the firmware.
+ * Error iocb (I/O) on txcmplq and let the SCSI layer
+ * retry it after re-establishing link.
+ */
+ pring = &psli->ring[psli->fcp_ring];
+ lpfc_sli_abort_iocb_ring(phba, pring);
+
+ /* Request a slot reset. */
+ return PCI_ERS_RESULT_NEED_RESET;
+}
+
+/**
+ * lpfc_io_slot_reset - called after the pci bus has been reset.
+ * @pdev: Pointer to PCI device
+ *
+ * Restart the card from scratch, as if from a cold-boot.
+ */
+static pci_ers_result_t lpfc_io_slot_reset(struct pci_dev *pdev)
+{
+ struct Scsi_Host *host = pci_get_drvdata(pdev);
+ struct lpfc_hba *phba = (struct lpfc_hba *)host->hostdata;
+ struct lpfc_sli *psli = &phba->sli;
+ int bars = pci_select_bars(pdev, IORESOURCE_MEM);
+
+ dev_printk(KERN_INFO, &pdev->dev, "recovering from a slot reset.\n");
+ if (pci_enable_device_bars(pdev, bars)) {
+ printk(KERN_ERR "lpfc: Cannot re-enable "
+ "PCI device after reset.\n");
+ return PCI_ERS_RESULT_DISCONNECT;
+ }
+
+ pci_set_master(pdev);
+
+ /* Re-establishing Link */
+ spin_lock_irq(phba->host->host_lock);
+ phba->fc_flag |= FC_ESTABLISH_LINK;
+ psli->sli_flag &= ~LPFC_SLI2_ACTIVE;
+ spin_unlock_irq(phba->host->host_lock);
+
+
+ /* Take device offline; this will perform cleanup */
+ lpfc_offline(phba);
+ lpfc_sli_brdrestart(phba);
+
+ return PCI_ERS_RESULT_RECOVERED;
+}
+
+/**
+ * lpfc_io_resume - called when traffic can start flowing again.
+ * @pdev: Pointer to PCI device
+ *
+ * This callback is called when the error recovery driver tells us that
+ * its OK to resume normal operation.
+ */
+static void lpfc_io_resume(struct pci_dev *pdev)
+{
+ struct Scsi_Host *host = pci_get_drvdata(pdev);
+ struct lpfc_hba *phba = (struct lpfc_hba *)host->hostdata;
+
+ if (lpfc_online(phba) == 0) {
+ mod_timer(&phba->fc_estabtmo, jiffies + HZ * 60);
+ }
+}
+
static struct pci_device_id lpfc_id_table[] = {
{PCI_VENDOR_ID_EMULEX, PCI_DEVICE_ID_VIPER,
PCI_ANY_ID, PCI_ANY_ID, },
@@ -1857,11 +1947,18 @@ static struct pci_device_id lpfc_id_table[] = {
MODULE_DEVICE_TABLE(pci, lpfc_id_table);
+static struct pci_error_handlers lpfc_err_handler = {
+ .error_detected = lpfc_io_error_detected,
+ .slot_reset = lpfc_io_slot_reset,
+ .resume = lpfc_io_resume,
+};
+
static struct pci_driver lpfc_driver = {
.name = LPFC_DRIVER_NAME,
.id_table = lpfc_id_table,
.probe = lpfc_pci_probe_one,
.remove = __devexit_p(lpfc_pci_remove_one),
+ .err_handler = &lpfc_err_handler,
};
static int __init
diff --git a/drivers/scsi/lpfc/lpfc_sli.c b/drivers/scsi/lpfc/lpfc_sli.c
index a4128e1..9fb6960 100644
--- a/drivers/scsi/lpfc/lpfc_sli.c
+++ b/drivers/scsi/lpfc/lpfc_sli.c
@@ -2104,6 +2104,10 @@ lpfc_sli_issue_mbox(struct lpfc_hba * phba, LPFC_MBOXQ_t
* pmbox, uint32_t flag)
volatile uint32_t word0, ldata;
void __iomem *to_slim;
+ /* If the PCI channel is in offline state, do not post mbox. */
+ if (unlikely(pci_channel_offline(phba->pcidev)))
+ return MBX_NOT_FINISHED;
+
psli = &phba->sli;
spin_lock_irqsave(phba->host->host_lock, drvr_flag);
@@ -2407,6 +2411,10 @@ lpfc_sli_issue_iocb(struct lpfc_hba *phba, struct
lpfc_sli_ring *pring,
struct lpfc_iocbq *nextiocb;
IOCB_t *iocb;
+ /* If the PCI channel is in offline state, do not post iocbs. */
+ if (unlikely(pci_channel_offline(phba->pcidev)))
+ return IOCB_ERROR;
+
/*
* We should never get an IOCB if we are in a < LINK_DOWN state
*/
@@ -3154,6 +3162,10 @@ lpfc_intr_handler(int irq, void *dev_id)
if (unlikely(!phba))
return IRQ_NONE;
+ /* If the pci channel is offline, ignore all the interrupts. */
+ if (unlikely(pci_channel_offline(phba->pcidev)))
+ return IRQ_NONE;
+
phba->sli.slistat.sli_intr++;
/*
-
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