+/**
+ * sym2_io_error_detected() - called when PCI error is detected
+ * @pdev: pointer to PCI device
+ * @state: current state of the PCI slot
+ */
+static pci_ers_result_t sym2_io_error_detected(struct pci_dev *pdev,
+ enum pci_channel_state state)
+{
+ /* If slot is permanently frozen, turn everything off */
+ if (state == pci_channel_io_perm_failure) {
+ sym2_remove(pdev);
+ return PCI_ERS_RESULT_DISCONNECT;
+ }
+
+ disable_irq(pdev->irq);
+ pci_disable_device(pdev);
+
+ /* Request that MMIO be enabled, so register dump can be taken. */
+ return PCI_ERS_RESULT_CAN_RECOVER;
+}
+
+/**
+ * sym2_io_slot_dump - Enable MMIO and dump debug registers
+ * @pdev: pointer to PCI device
+ */
+static pci_ers_result_t sym2_io_slot_dump(struct pci_dev *pdev)
+{
+ struct sym_hcb *np = pci_get_drvdata(pdev);
+
+ sym_dump_registers(np);
+
+ /* Request a slot reset. */
+ return PCI_ERS_RESULT_NEED_RESET;
+}
+
+/**
+ * sym2_reset_workarounds - hardware-specific work-arounds
+ *
+ * This routine is similar to sym_set_workarounds(), except
+ * that, at this point, we already know that the device was
+ * succesfully intialized at least once before, and so most
+ * of the steps taken there are un-needed here.
+ */
+static void sym2_reset_workarounds(struct pci_dev *pdev)
+{
+ u_short status_reg;
+ struct sym_chip *chip;
+
+ chip = sym_lookup_chip_table(pdev->device, pdev->revision);
+
+ /* Work around for errant bit in 895A, in a fashion
+ * similar to what is done in sym_set_workarounds().
+ */
+ pci_read_config_word(pdev, PCI_STATUS, &status_reg);
+ if (!(chip->features & FE_66MHZ) && (status_reg & PCI_STATUS_66MHZ)) {
+ status_reg = PCI_STATUS_66MHZ;
+ pci_write_config_word(pdev, PCI_STATUS, status_reg);
+ pci_read_config_word(pdev, PCI_STATUS, &status_reg);
+ }
+}
+
+/**
+ * sym2_io_slot_reset() - called when the pci bus has been reset.
+ * @pdev: pointer to PCI device
+ *
+ * Restart the card from scratch.
+ */
+static pci_ers_result_t sym2_io_slot_reset(struct pci_dev *pdev)
+{
+ struct sym_hcb *np = pci_get_drvdata(pdev);
+
+ printk(KERN_INFO "%s: recovering from a PCI slot reset\n",
+ sym_name(np));
+
+ if (pci_enable_device(pdev)) {
+ printk(KERN_ERR "%s: Unable to enable after PCI reset\n",
+ sym_name(np));
+ return PCI_ERS_RESULT_DISCONNECT;
+ }
+
+ pci_set_master(pdev);
+ enable_irq(pdev->irq);
+
+ /* If the chip can do Memory Write Invalidate, enable it */
+ if (np->features & FE_WRIE) {
+ if (pci_set_mwi(pdev))
+ return PCI_ERS_RESULT_DISCONNECT;
+ }
+
+ /* Perform work-arounds, analogous to sym_set_workarounds() */
+ sym2_reset_workarounds(pdev);
+
+ /* Perform host reset only on one instance of the card */
+ if (PCI_FUNC(pdev->devfn) == 0) {
+ if (sym_reset_scsi_bus(np, 0)) {
+ printk(KERN_ERR "%s: Unable to reset scsi host\n",
+ sym_name(np));
+ return PCI_ERS_RESULT_DISCONNECT;
+ }
+ sym_start_up(np, 1);
+ }
+
+ return PCI_ERS_RESULT_RECOVERED;
+}
+
+/**
+ * sym2_io_resume() - resume normal ops after PCI reset
+ * @pdev: pointer to PCI device
+ *
+ * Called when the error recovery driver tells us that its
+ * OK to resume normal operation. Use completion to allow
+ * halted scsi ops to resume.
+ */
+static void sym2_io_resume(struct pci_dev *pdev)
+{
+ struct sym_hcb *np = pci_get_drvdata(pdev);
+ struct Scsi_Host *shost = np->s.host;
+ struct host_data *hostdata = shost_priv(shost);
+
+ spin_lock_irq(shost->host_lock);
+ if (hostdata->io_reset)
+ complete_all(hostdata->io_reset);
+ hostdata->io_reset = NULL;
+ spin_unlock_irq(shost->host_lock);
+}
+