Commit b0d66369 authored by Raghu Vatsavayi's avatar Raghu Vatsavayi Committed by David S. Miller

liquidio VF error handling

Adds support for VF error handling.
Signed-off-by: default avatarRaghu Vatsavayi <raghu.vatsavayi@caviumnetworks.com>
Signed-off-by: default avatarDerek Chickles <derek.chickles@caviumnetworks.com>
Signed-off-by: default avatarSatanand Burla <satananda.burla@caviumnetworks.com>
Signed-off-by: default avatarFelix Manlunas <felix.manlunas@caviumnetworks.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent f625fe62
......@@ -175,6 +175,144 @@ static int wait_for_pending_requests(struct octeon_device *oct)
return 0;
}
/**
* \brief Cause device to go quiet so it can be safely removed/reset/etc
* @param oct Pointer to Octeon device
*/
static void pcierror_quiesce_device(struct octeon_device *oct)
{
int i;
/* Disable the input and output queues now. No more packets will
* arrive from Octeon, but we should wait for all packet processing
* to finish.
*/
/* To allow for in-flight requests */
schedule_timeout_uninterruptible(100);
if (wait_for_pending_requests(oct))
dev_err(&oct->pci_dev->dev, "There were pending requests\n");
/* Force all requests waiting to be fetched by OCTEON to complete. */
for (i = 0; i < MAX_OCTEON_INSTR_QUEUES(oct); i++) {
struct octeon_instr_queue *iq;
if (!(oct->io_qmask.iq & BIT_ULL(i)))
continue;
iq = oct->instr_queue[i];
if (atomic_read(&iq->instr_pending)) {
spin_lock_bh(&iq->lock);
iq->fill_cnt = 0;
iq->octeon_read_index = iq->host_write_index;
iq->stats.instr_processed +=
atomic_read(&iq->instr_pending);
lio_process_iq_request_list(oct, iq, 0);
spin_unlock_bh(&iq->lock);
}
}
/* Force all pending ordered list requests to time out. */
lio_process_ordered_list(oct, 1);
/* We do not need to wait for output queue packets to be processed. */
}
/**
* \brief Cleanup PCI AER uncorrectable error status
* @param dev Pointer to PCI device
*/
static void cleanup_aer_uncorrect_error_status(struct pci_dev *dev)
{
u32 status, mask;
int pos = 0x100;
pr_info("%s :\n", __func__);
pci_read_config_dword(dev, pos + PCI_ERR_UNCOR_STATUS, &status);
pci_read_config_dword(dev, pos + PCI_ERR_UNCOR_SEVER, &mask);
if (dev->error_state == pci_channel_io_normal)
status &= ~mask; /* Clear corresponding nonfatal bits */
else
status &= mask; /* Clear corresponding fatal bits */
pci_write_config_dword(dev, pos + PCI_ERR_UNCOR_STATUS, status);
}
/**
* \brief Stop all PCI IO to a given device
* @param dev Pointer to Octeon device
*/
static void stop_pci_io(struct octeon_device *oct)
{
struct msix_entry *msix_entries;
int i;
/* No more instructions will be forwarded. */
atomic_set(&oct->status, OCT_DEV_IN_RESET);
for (i = 0; i < oct->ifcount; i++)
netif_device_detach(oct->props[i].netdev);
/* Disable interrupts */
oct->fn_list.disable_interrupt(oct, OCTEON_ALL_INTR);
pcierror_quiesce_device(oct);
if (oct->msix_on) {
msix_entries = (struct msix_entry *)oct->msix_entries;
for (i = 0; i < oct->num_msix_irqs; i++) {
/* clear the affinity_cpumask */
irq_set_affinity_hint(msix_entries[i].vector,
NULL);
free_irq(msix_entries[i].vector,
&oct->ioq_vector[i]);
}
pci_disable_msix(oct->pci_dev);
kfree(oct->msix_entries);
oct->msix_entries = NULL;
octeon_free_ioq_vector(oct);
}
dev_dbg(&oct->pci_dev->dev, "Device state is now %s\n",
lio_get_state_string(&oct->status));
/* making it a common function for all OCTEON models */
cleanup_aer_uncorrect_error_status(oct->pci_dev);
pci_disable_device(oct->pci_dev);
}
/**
* \brief called when PCI error is detected
* @param pdev Pointer to PCI device
* @param state The current pci connection state
*
* This function is called after a PCI bus error affecting
* this device has been detected.
*/
static pci_ers_result_t liquidio_pcie_error_detected(struct pci_dev *pdev,
pci_channel_state_t state)
{
struct octeon_device *oct = pci_get_drvdata(pdev);
/* Non-correctable Non-fatal errors */
if (state == pci_channel_io_normal) {
dev_err(&oct->pci_dev->dev, "Non-correctable non-fatal error reported:\n");
cleanup_aer_uncorrect_error_status(oct->pci_dev);
return PCI_ERS_RESULT_CAN_RECOVER;
}
/* Non-correctable Fatal errors */
dev_err(&oct->pci_dev->dev, "Non-correctable FATAL reported by PCI AER driver\n");
stop_pci_io(oct);
return PCI_ERS_RESULT_DISCONNECT;
}
/* For PCI-E Advanced Error Recovery (AER) Interface */
static const struct pci_error_handlers liquidio_vf_err_handler = {
.error_detected = liquidio_pcie_error_detected,
};
static const struct pci_device_id liquidio_vf_pci_tbl[] = {
{
PCI_VENDOR_ID_CAVIUM, OCTEON_CN23XX_VF_VID,
......@@ -191,6 +329,7 @@ static struct pci_driver liquidio_vf_pci_driver = {
.id_table = liquidio_vf_pci_tbl,
.probe = liquidio_vf_probe,
.remove = liquidio_vf_remove,
.err_handler = &liquidio_vf_err_handler, /* For AER */
};
/**
......
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