/* When a PCI device is isolated from the bus, a subsequent MMIO read is
* required for the kernel EEH mechanisms to notice. As the Solarflare driver
* was written to minimise MMIO read (for latency) then a periodic call to check
* the EEH status of the device is required so that device recovery can happen
* in a timely fashion.
*/
static void siena_monitor(struct efx_nic *efx)
{
struct eeh_dev *eehdev =
of_node_to_eeh_dev(pci_device_to_OF_node(efx->pci_dev));
eeh_dev_check_failure(eehdev);
}
int rtas_read_config(struct pci_dn *pdn, int where, int size, u32 *val)
{
int returnval = -1;
unsigned long buid, addr;
int ret;
if (!pdn)
return PCIBIOS_DEVICE_NOT_FOUND;
if (!config_access_valid(pdn, where))
return PCIBIOS_BAD_REGISTER_NUMBER;
addr = rtas_config_addr(pdn->busno, pdn->devfn, where);
buid = pdn->phb->buid;
if (buid) {
ret = rtas_call(ibm_read_pci_config, 4, 2, &returnval,
addr, BUID_HI(buid), BUID_LO(buid), size);
} else {
ret = rtas_call(read_pci_config, 2, 2, &returnval, addr, size);
}
*val = returnval;
if (ret)
return PCIBIOS_DEVICE_NOT_FOUND;
if (returnval == EEH_IO_ERROR_VALUE(size) &&
eeh_dev_check_failure(of_node_to_eeh_dev(pdn->node)))
return PCIBIOS_DEVICE_NOT_FOUND;
return PCIBIOS_SUCCESSFUL;
}
/* When a PCI device is isolated from the bus, a subsequent MMIO read is
* required for the kernel EEH mechanisms to notice. As the Solarflare driver
* was written to minimise MMIO read (for latency) then a periodic call to check
* the EEH status of the device is required so that device recovery can happen
* in a timely fashion.
*/
static void siena_monitor(struct efx_nic *efx)
{
struct eeh_dev *eehdev = pci_dev_to_eeh_dev(efx->pci_dev);
eeh_dev_check_failure(eehdev);
}
