/**
* genwqe_bus_reset() - Card recovery
*
* pci_reset_function() will recover the device and ensure that the
* registers are accessible again when it completes with success. If
* not, the card will stay dead and registers will be unaccessible
* still.
*/
static int genwqe_bus_reset(struct genwqe_dev *cd)
{
int bars, rc = 0;
struct pci_dev *pci_dev = cd->pci_dev;
void __iomem *mmio;
if (cd->err_inject & GENWQE_INJECT_BUS_RESET_FAILURE)
return -EIO;
mmio = cd->mmio;
cd->mmio = NULL;
pci_iounmap(pci_dev, mmio);
bars = pci_select_bars(pci_dev, IORESOURCE_MEM);
pci_release_selected_regions(pci_dev, bars);
/*
* Firmware/BIOS might change memory mapping during bus reset.
* Settings like enable bus-mastering, ... are backuped and
* restored by the pci_reset_function().
*/
dev_dbg(&pci_dev->dev, "[%s] pci_reset function ...\n", __func__);
rc = pci_reset_function(pci_dev);
if (rc) {
dev_err(&pci_dev->dev,
"[%s] err: failed reset func (rc %d)\n", __func__, rc);
return rc;
}
dev_dbg(&pci_dev->dev, "[%s] done with rc=%d\n", __func__, rc);
/*
* Here is the right spot to clear the register read
* failure. pci_bus_reset() does this job in real systems.
*/
cd->err_inject &= ~(GENWQE_INJECT_HARDWARE_FAILURE |
GENWQE_INJECT_GFIR_FATAL |
GENWQE_INJECT_GFIR_INFO);
rc = pci_request_selected_regions(pci_dev, bars, genwqe_driver_name);
if (rc) {
dev_err(&pci_dev->dev,
"[%s] err: request bars failed (%d)\n", __func__, rc);
return -EIO;
}
cd->mmio = pci_iomap(pci_dev, 0, 0);
if (cd->mmio == NULL) {
dev_err(&pci_dev->dev,
"[%s] err: mapping BAR0 failed\n", __func__);
return -ENOMEM;
}
return 0;
}
int vboxPciOsDevReset(PVBOXRAWPCIINS pIns)
{
int rc = VINF_SUCCESS;
if (pIns->pPciDev)
{
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 28)
if (pci_reset_function(pIns->pPciDev))
{
printk(KERN_DEBUG "vboxpci: pci_reset_function() failed\n");
rc = VERR_INTERNAL_ERROR;
}
#else
rc = VERR_NOT_SUPPORTED;
#endif
}
return rc;
}
static int vboxPciLinuxDevReset(PVBOXRAWPCIINS pIns)
{
int rc = VINF_SUCCESS;
IPRT_LINUX_SAVE_EFL_AC();
if (RT_LIKELY(pIns->pPciDev))
{
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 28)
if (pci_reset_function(pIns->pPciDev))
{
vbpci_printk(KERN_DEBUG, pIns->pPciDev,
"pci_reset_function() failed\n");
rc = VERR_INTERNAL_ERROR;
}
#else
rc = VERR_NOT_SUPPORTED;
#endif
}
else
rc = VERR_INVALID_PARAMETER;
IPRT_LINUX_RESTORE_EFL_AC();
return rc;
}
