diff options
Diffstat (limited to 'drivers/bus/pci/linux')
| -rw-r--r-- | drivers/bus/pci/linux/pci.c | 48 |
1 files changed, 42 insertions, 6 deletions
diff --git a/drivers/bus/pci/linux/pci.c b/drivers/bus/pci/linux/pci.c index 45c24ef7..c99d523f 100644 --- a/drivers/bus/pci/linux/pci.c +++ b/drivers/bus/pci/linux/pci.c @@ -349,11 +349,36 @@ pci_scan_one(const char *dirname, const struct rte_pci_addr *addr) if (ret < 0) { rte_pci_insert_device(dev2, dev); } else { /* already registered */ - dev2->kdrv = dev->kdrv; - dev2->max_vfs = dev->max_vfs; - pci_name_set(dev2); - memmove(dev2->mem_resource, dev->mem_resource, - sizeof(dev->mem_resource)); + if (!rte_dev_is_probed(&dev2->device)) { + dev2->kdrv = dev->kdrv; + dev2->max_vfs = dev->max_vfs; + pci_name_set(dev2); + memmove(dev2->mem_resource, + dev->mem_resource, + sizeof(dev->mem_resource)); + } else { + /** + * If device is plugged and driver is + * probed already, (This happens when + * we call rte_dev_probe which will + * scan all device on the bus) we don't + * need to do anything here unless... + **/ + if (dev2->kdrv != dev->kdrv || + dev2->max_vfs != dev->max_vfs) + /* + * This should not happens. + * But it is still possible if + * we unbind a device from + * vfio or uio before hotplug + * remove and rebind it with + * a different configure. + * So we just print out the + * error as an alarm. + */ + RTE_LOG(ERR, EAL, "Unexpected device scan at %s!\n", + filename); + } free(dev); } return 0; @@ -590,7 +615,16 @@ pci_one_device_iommu_support_va(struct rte_pci_device *dev) mgaw = ((vtd_cap_reg & VTD_CAP_MGAW_MASK) >> VTD_CAP_MGAW_SHIFT) + 1; - return rte_eal_check_dma_mask(mgaw) == 0 ? true : false; + /* + * Assuming there is no limitation by now. We can not know at this point + * because the memory has not been initialized yet. Setting the dma mask + * will force a check once memory initialization is done. We can not do + * a fallback to IOVA PA now, but if the dma check fails, the error + * message should advice for using '--iova-mode pa' if IOVA VA is the + * current mode. + */ + rte_mem_set_dma_mask(mgaw); + return true; } #elif defined(RTE_ARCH_PPC_64) static bool @@ -679,6 +713,7 @@ int rte_pci_read_config(const struct rte_pci_device *device, switch (device->kdrv) { case RTE_KDRV_IGB_UIO: + case RTE_KDRV_UIO_GENERIC: return pci_uio_read_config(intr_handle, buf, len, offset); #ifdef VFIO_PRESENT case RTE_KDRV_VFIO: @@ -702,6 +737,7 @@ int rte_pci_write_config(const struct rte_pci_device *device, switch (device->kdrv) { case RTE_KDRV_IGB_UIO: + case RTE_KDRV_UIO_GENERIC: return pci_uio_write_config(intr_handle, buf, len, offset); #ifdef VFIO_PRESENT case RTE_KDRV_VFIO: |