[SCSI] qla2xxx: Add PCI error recovery support.

Additional cleanups and
Signed-off-by: Andrew Vasquez <andrew.vasquez@qlogic.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>

1 files changed, 114 insertions, 0 deletions

diff --git a/drivers/scsi/qla2xxx/qla_os.c b/drivers/scsi/qla2xxx/qla_os.c
index 2a03400b6f7..a8ab2d3447b 100644
--- a/drivers/scsi/qla2xxx/qla_os.c
+++ b/drivers/scsi/qla2xxx/qla_os.c
@@ -385,6 +385,11 @@ qla2x00_queuecommand(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *))
 	srb_t *sp;
 	int rval;
 
+	if (unlikely(pci_channel_offline(ha->pdev))) {
+		cmd->result = DID_REQUEUE << 16;
+		goto qc_fail_command;
+	}
+
 	rval = fc_remote_port_chkready(rport);
 	if (rval) {
 		cmd->result = rval;
@@ -447,6 +452,11 @@ qla24xx_queuecommand(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *))
 	int rval;
 	scsi_qla_host_t *pha = to_qla_parent(ha);
 
+	if (unlikely(pci_channel_offline(ha->pdev))) {
+		cmd->result = DID_REQUEUE << 16;
+		goto qc24_fail_command;
+	}
+
 	rval = fc_remote_port_chkready(rport);
 	if (rval) {
 		cmd->result = rval;
@@ -1571,6 +1581,10 @@ qla2x00_probe_one(struct pci_dev *pdev, const struct pci_device_id *id)
 	if (pci_enable_device(pdev))
 		goto probe_out;
 
+	if (pci_find_aer_capability(pdev))
+		if (pci_enable_pcie_error_reporting(pdev))
+			goto probe_out;
+
 	sht = &qla2x00_driver_template;
 	if (pdev->device == PCI_DEVICE_ID_QLOGIC_ISP2422 ||
 	    pdev->device == PCI_DEVICE_ID_QLOGIC_ISP2432 ||
@@ -2814,6 +2828,105 @@ qla2x00_release_firmware(void)
 	up(&qla_fw_lock);
 }
 
+static pci_ers_result_t
+qla2xxx_pci_error_detected(struct pci_dev *pdev, pci_channel_state_t state)
+{
+	switch (state) {
+	case pci_channel_io_normal:
+		return PCI_ERS_RESULT_CAN_RECOVER;
+	case pci_channel_io_frozen:
+		pci_disable_device(pdev);
+		return PCI_ERS_RESULT_NEED_RESET;
+	case pci_channel_io_perm_failure:
+		qla2x00_remove_one(pdev);
+		return PCI_ERS_RESULT_DISCONNECT;
+	}
+	return PCI_ERS_RESULT_NEED_RESET;
+}
+
+static pci_ers_result_t
+qla2xxx_pci_mmio_enabled(struct pci_dev *pdev)
+{
+	int risc_paused = 0;
+	uint32_t stat;
+	unsigned long flags;
+	scsi_qla_host_t *ha = pci_get_drvdata(pdev);
+	struct device_reg_2xxx __iomem *reg = &ha->iobase->isp;
+	struct device_reg_24xx __iomem *reg24 = &ha->iobase->isp24;
+
+	spin_lock_irqsave(&ha->hardware_lock, flags);
+	if (IS_QLA2100(ha) || IS_QLA2200(ha)){
+		stat = RD_REG_DWORD(&reg->hccr);
+		if (stat & HCCR_RISC_PAUSE)
+			risc_paused = 1;
+	} else if (IS_QLA23XX(ha)) {
+		stat = RD_REG_DWORD(&reg->u.isp2300.host_status);
+		if (stat & HSR_RISC_PAUSED)
+			risc_paused = 1;
+	} else if (IS_FWI2_CAPABLE(ha)) {
+		stat = RD_REG_DWORD(&reg24->host_status);
+		if (stat & HSRX_RISC_PAUSED)
+			risc_paused = 1;
+	}
+	spin_unlock_irqrestore(&ha->hardware_lock, flags);
+
+	if (risc_paused) {
+		qla_printk(KERN_INFO, ha, "RISC paused -- mmio_enabled, "
+		    "Dumping firmware!\n");
+		ha->isp_ops->fw_dump(ha, 0);
+
+		return PCI_ERS_RESULT_NEED_RESET;
+	} else
+		return PCI_ERS_RESULT_RECOVERED;
+}
+
+static pci_ers_result_t
+qla2xxx_pci_slot_reset(struct pci_dev *pdev)
+{
+	pci_ers_result_t ret = PCI_ERS_RESULT_DISCONNECT;
+	scsi_qla_host_t *ha = pci_get_drvdata(pdev);
+
+	if (pci_enable_device(pdev)) {
+		qla_printk(KERN_WARNING, ha,
+		    "Can't re-enable PCI device after reset.\n");
+
+		return ret;
+	}
+	pci_set_master(pdev);
+
+	if (ha->isp_ops->pci_config(ha))
+		return ret;
+
+	set_bit(ABORT_ISP_ACTIVE, &ha->dpc_flags);
+	if (qla2x00_abort_isp(ha)== QLA_SUCCESS)
+		ret =  PCI_ERS_RESULT_RECOVERED;
+	clear_bit(ABORT_ISP_ACTIVE, &ha->dpc_flags);
+
+	return ret;
+}
+
+static void
+qla2xxx_pci_resume(struct pci_dev *pdev)
+{
+	scsi_qla_host_t *ha = pci_get_drvdata(pdev);
+	int ret;
+
+	ret = qla2x00_wait_for_hba_online(ha);
+	if (ret != QLA_SUCCESS) {
+		qla_printk(KERN_ERR, ha,
+		    "the device failed to resume I/O "
+		    "from slot/link_reset");
+	}
+	pci_cleanup_aer_uncorrect_error_status(pdev);
+}
+
+static struct pci_error_handlers qla2xxx_err_handler = {
+	.error_detected = qla2xxx_pci_error_detected,
+	.mmio_enabled = qla2xxx_pci_mmio_enabled,
+	.slot_reset = qla2xxx_pci_slot_reset,
+	.resume = qla2xxx_pci_resume,
+};
+
 static struct pci_device_id qla2xxx_pci_tbl[] = {
 	{ PCI_DEVICE(PCI_VENDOR_ID_QLOGIC, PCI_DEVICE_ID_QLOGIC_ISP2100) },
 	{ PCI_DEVICE(PCI_VENDOR_ID_QLOGIC, PCI_DEVICE_ID_QLOGIC_ISP2200) },
@@ -2839,6 +2952,7 @@ static struct pci_driver qla2xxx_pci_driver = {
 	.id_table	= qla2xxx_pci_tbl,
 	.probe		= qla2x00_probe_one,
 	.remove		= __devexit_p(qla2x00_remove_one),
+	.err_handler	= &qla2xxx_err_handler,
 };
 
 /**