*
*/
#include <linux/delay.h>
-#include <linux/irq.h>
#include <linux/interrupt.h>
-#include <linux/notifier.h>
+#include <linux/irq.h>
#include <linux/pci.h>
#include <asm/eeh.h>
#include <asm/eeh_event.h>
}
/* ------------------------------------------------------- */
-/** eeh_report_error - report an EEH error to each device,
- * collect up and merge the device responses.
+/**
+ * eeh_report_error - report pci error to each device driver
+ *
+ * Report an EEH error to each device driver, collect up and
+ * merge the device driver responses. Cumulative response
+ * passed back in "userdata".
*/
static void eeh_report_error(struct pci_dev *dev, void *userdata)
PCI_DN(dn)->eeh_mode |= EEH_MODE_IRQ_DISABLED;
disable_irq_nosync(dev->irq);
}
- if (!driver->err_handler)
- return;
- if (!driver->err_handler->error_detected)
+ if (!driver->err_handler ||
+ !driver->err_handler->error_detected)
return;
rc = driver->err_handler->error_detected (dev, pci_channel_io_frozen);
if (*res == PCI_ERS_RESULT_NONE) *res = rc;
- if (*res == PCI_ERS_RESULT_NEED_RESET) return;
if (*res == PCI_ERS_RESULT_DISCONNECT &&
rc == PCI_ERS_RESULT_NEED_RESET) *res = rc;
}
-/** eeh_report_reset -- tell this device that the pci slot
- * has been reset.
+/**
+ * eeh_report_mmio_enabled - tell drivers that MMIO has been enabled
+ *
+ * Report an EEH error to each device driver, collect up and
+ * merge the device driver responses. Cumulative response
+ * passed back in "userdata".
+ */
+
+static void eeh_report_mmio_enabled(struct pci_dev *dev, void *userdata)
+{
+ enum pci_ers_result rc, *res = userdata;
+ struct pci_driver *driver = dev->driver;
+
+ // dev->error_state = pci_channel_mmio_enabled;
+
+ if (!driver ||
+ !driver->err_handler ||
+ !driver->err_handler->mmio_enabled)
+ return;
+
+ rc = driver->err_handler->mmio_enabled (dev);
+ if (*res == PCI_ERS_RESULT_NONE) *res = rc;
+ if (*res == PCI_ERS_RESULT_DISCONNECT &&
+ rc == PCI_ERS_RESULT_NEED_RESET) *res = rc;
+}
+
+/**
+ * eeh_report_reset - tell device that slot has been reset
*/
static void eeh_report_reset(struct pci_dev *dev, void *userdata)
{
+ enum pci_ers_result rc, *res = userdata;
struct pci_driver *driver = dev->driver;
struct device_node *dn = pci_device_to_OF_node(dev);
PCI_DN(dn)->eeh_mode &= ~EEH_MODE_IRQ_DISABLED;
enable_irq(dev->irq);
}
- if (!driver->err_handler)
- return;
- if (!driver->err_handler->slot_reset)
+ if (!driver->err_handler ||
+ !driver->err_handler->slot_reset)
return;
- driver->err_handler->slot_reset(dev);
+ rc = driver->err_handler->slot_reset(dev);
+ if (*res == PCI_ERS_RESULT_NONE) *res = rc;
+ if (*res == PCI_ERS_RESULT_DISCONNECT &&
+ rc == PCI_ERS_RESULT_NEED_RESET) *res = rc;
}
+/**
+ * eeh_report_resume - tell device to resume normal operations
+ */
+
static void eeh_report_resume(struct pci_dev *dev, void *userdata)
{
struct pci_driver *driver = dev->driver;
+ struct device_node *dn = pci_device_to_OF_node(dev);
dev->error_state = pci_channel_io_normal;
if (!driver)
return;
- if (!driver->err_handler)
- return;
- if (!driver->err_handler->resume)
+
+ if ((PCI_DN(dn)->eeh_mode) & EEH_MODE_IRQ_DISABLED) {
+ PCI_DN(dn)->eeh_mode &= ~EEH_MODE_IRQ_DISABLED;
+ enable_irq(dev->irq);
+ }
+ if (!driver->err_handler ||
+ !driver->err_handler->resume)
return;
driver->err_handler->resume(dev);
}
+/**
+ * eeh_report_failure - tell device driver that device is dead.
+ *
+ * This informs the device driver that the device is permanently
+ * dead, and that no further recovery attempts will be made on it.
+ */
+
static void eeh_report_failure(struct pci_dev *dev, void *userdata)
{
struct pci_driver *driver = dev->driver;
*
* pSeries systems will isolate a PCI slot if the PCI-Host
* bridge detects address or data parity errors, DMA's
- * occuring to wild addresses (which usually happen due to
+ * occurring to wild addresses (which usually happen due to
* bugs in device drivers or in PCI adapter firmware).
* Slot isolations also occur if #SERR, #PERR or other misc
* PCI-related errors are detected.
/**
* eeh_reset_device() -- perform actual reset of a pci slot
- * Args: bus: pointer to the pci bus structure corresponding
+ * @bus: pointer to the pci bus structure corresponding
* to the isolated slot. A non-null value will
* cause all devices under the bus to be removed
* and then re-added.
- * pe_dn: pointer to a "Partionable Endpoint" device node.
+ * @pe_dn: pointer to a "Partionable Endpoint" device node.
* This is the top-level structure on which pci
* bus resets can be performed.
*/
static int eeh_reset_device (struct pci_dn *pe_dn, struct pci_bus *bus)
{
- int rc;
+ int cnt, rc;
+
+ /* pcibios will clear the counter; save the value */
+ cnt = pe_dn->eeh_freeze_count;
+
if (bus)
pcibios_remove_pci_devices(bus);
ssleep (5);
pcibios_add_pci_devices(bus);
}
+ pe_dn->eeh_freeze_count = cnt;
return 0;
}
*/
#define MAX_WAIT_FOR_RECOVERY 15
-void handle_eeh_events (struct eeh_event *event)
+struct pci_dn * handle_eeh_events (struct eeh_event *event)
{
struct device_node *frozen_dn;
struct pci_dn *frozen_pdn;
struct pci_bus *frozen_bus;
int rc = 0;
enum pci_ers_result result = PCI_ERS_RESULT_NONE;
+ const char *location, *pci_str, *drv_str;
frozen_dn = find_device_pe(event->dn);
frozen_bus = pcibios_find_pci_bus(frozen_dn);
if (!frozen_dn) {
- printk(KERN_ERR "EEH: Error: Cannot find partition endpoint for %s\n",
- pci_name(event->dev));
- return;
+
+ location = get_property(event->dn, "ibm,loc-code", NULL);
+ location = location ? location : "unknown";
+ printk(KERN_ERR "EEH: Error: Cannot find partition endpoint "
+ "for location=%s pci addr=%s\n",
+ location, pci_name(event->dev));
+ return NULL;
}
+ location = get_property(frozen_dn, "ibm,loc-code", NULL);
+ location = location ? location : "unknown";
/* There are two different styles for coming up with the PE.
* In the old style, it was the highest EEH-capable device
frozen_bus = pcibios_find_pci_bus (frozen_dn->parent);
if (!frozen_bus) {
- printk(KERN_ERR "EEH: Cannot find PCI bus for %s\n",
- frozen_dn->full_name);
- return;
+ printk(KERN_ERR "EEH: Cannot find PCI bus "
+ "for location=%s dn=%s\n",
+ location, frozen_dn->full_name);
+ return NULL;
}
#if 0
frozen_pdn = PCI_DN(frozen_dn);
frozen_pdn->eeh_freeze_count++;
+
+ if (frozen_pdn->pcidev) {
+ pci_str = pci_name (frozen_pdn->pcidev);
+ drv_str = pcid_name (frozen_pdn->pcidev);
+ } else {
+ pci_str = pci_name (event->dev);
+ drv_str = pcid_name (event->dev);
+ }
if (frozen_pdn->eeh_freeze_count > EEH_MAX_ALLOWED_FREEZES)
- goto hard_fail;
+ goto excess_failures;
/* If the reset state is a '5' and the time to reset is 0 (infinity)
* or is more then 15 seconds, then mark this as a permanent failure.
eeh_slot_error_detail(frozen_pdn, 1 /* Temporary Error */);
printk(KERN_WARNING
- "EEH: This PCI device has failed %d times since last reboot: %s - %s\n",
- frozen_pdn->eeh_freeze_count,
- pci_name (frozen_pdn->pcidev),
- pcid_name(frozen_pdn->pcidev));
+ "EEH: This PCI device has failed %d times since last reboot: "
+ "location=%s driver=%s pci addr=%s\n",
+ frozen_pdn->eeh_freeze_count, location, drv_str, pci_str);
/* Walk the various device drivers attached to this slot through
* a reset sequence, giving each an opportunity to do what it needs
goto hard_fail;
}
- /* If any device called out for a reset, then reset the slot */
- if (result == PCI_ERS_RESULT_NEED_RESET) {
- rc = eeh_reset_device(frozen_pdn, NULL);
- if (rc)
- goto hard_fail;
- pci_walk_bus(frozen_bus, eeh_report_reset, NULL);
+ /* If all devices reported they can proceed, then re-enable MMIO */
+ if (result == PCI_ERS_RESULT_CAN_RECOVER) {
+ rc = rtas_pci_enable(frozen_pdn, EEH_THAW_MMIO);
+
+ if (rc) {
+ result = PCI_ERS_RESULT_NEED_RESET;
+ } else {
+ result = PCI_ERS_RESULT_NONE;
+ pci_walk_bus(frozen_bus, eeh_report_mmio_enabled, &result);
+ }
}
- /* If all devices reported they can proceed, the re-enable PIO */
+ /* If all devices reported they can proceed, then re-enable DMA */
if (result == PCI_ERS_RESULT_CAN_RECOVER) {
- /* XXX Not supported; we brute-force reset the device */
+ rc = rtas_pci_enable(frozen_pdn, EEH_THAW_DMA);
+
+ if (rc)
+ result = PCI_ERS_RESULT_NEED_RESET;
+ else
+ result = PCI_ERS_RESULT_RECOVERED;
+ }
+
+ /* If any device has a hard failure, then shut off everything. */
+ if (result == PCI_ERS_RESULT_DISCONNECT)
+ goto hard_fail;
+
+ /* If any device called out for a reset, then reset the slot */
+ if (result == PCI_ERS_RESULT_NEED_RESET) {
rc = eeh_reset_device(frozen_pdn, NULL);
if (rc)
goto hard_fail;
- pci_walk_bus(frozen_bus, eeh_report_reset, NULL);
+ result = PCI_ERS_RESULT_NONE;
+ pci_walk_bus(frozen_bus, eeh_report_reset, &result);
}
+ /* All devices should claim they have recovered by now. */
+ if (result != PCI_ERS_RESULT_RECOVERED)
+ goto hard_fail;
+
/* Tell all device drivers that they can resume operations */
pci_walk_bus(frozen_bus, eeh_report_resume, NULL);
- return;
+ return frozen_pdn;
-hard_fail:
+excess_failures:
/*
* About 90% of all real-life EEH failures in the field
* are due to poorly seated PCI cards. Only 10% or so are
* due to actual, failed cards.
*/
printk(KERN_ERR
- "EEH: PCI device %s - %s has failed %d times \n"
- "and has been permanently disabled. Please try reseating\n"
- "this device or replacing it.\n",
- pci_name (frozen_pdn->pcidev),
- pcid_name(frozen_pdn->pcidev),
- frozen_pdn->eeh_freeze_count);
+ "EEH: PCI device at location=%s driver=%s pci addr=%s \n"
+ "has failed %d times and has been permanently disabled. \n"
+ "Please try reseating this device or replacing it.\n",
+ location, drv_str, pci_str, frozen_pdn->eeh_freeze_count);
+ goto perm_error;
+hard_fail:
+ printk(KERN_ERR
+ "EEH: Unable to recover from failure of PCI device "
+ "at location=%s driver=%s pci addr=%s \n"
+ "Please try reseating this device or replacing it.\n",
+ location, drv_str, pci_str);
+
+perm_error:
eeh_slot_error_detail(frozen_pdn, 2 /* Permanent Error */);
/* Notify all devices that they're about to go down. */
/* Shut down the device drivers for good. */
pcibios_remove_pci_devices(frozen_bus);
+
+ return NULL;
}
/* ---------- end of file ---------- */
git://git.onelab.eu / linux-2.6.git / blobdiff