* Return -1: * if there is error mapping with VFIO/UIO. * if port map error when driver type is KDRV_NONE. * if marked as allowed but driver type is KDRV_UNKNOWN. * Return 1 if kernel driver is managing the device. * Return 0 on success. */
| 656 | * Return 0 on success. |
| 657 | */ |
| 658 | int |
| 659 | vtpci_init(struct rte_pci_device *pci_dev, struct virtio_pci_dev *dev) |
| 660 | { |
| 661 | struct virtio_hw *hw = &dev->hw; |
| 662 | |
| 663 | RTE_BUILD_BUG_ON(offsetof(struct virtio_pci_dev, hw) != 0); |
| 664 | |
| 665 | /* |
| 666 | * Try if we can succeed reading virtio pci caps, which exists |
| 667 | * only on modern pci device. If failed, we fallback to legacy |
| 668 | * virtio handling. |
| 669 | */ |
| 670 | if (virtio_read_caps(pci_dev, hw) == 0) { |
| 671 | PMD_INIT_LOG(INFO, "modern virtio pci detected."); |
| 672 | VIRTIO_OPS(hw) = &modern_ops; |
| 673 | dev->modern = true; |
| 674 | goto msix_detect; |
| 675 | } |
| 676 | |
| 677 | PMD_INIT_LOG(INFO, "trying with legacy virtio pci."); |
| 678 | if (rte_pci_ioport_map(pci_dev, 0, VTPCI_IO(hw)) < 0) { |
| 679 | rte_pci_unmap_device(pci_dev); |
| 680 | if (pci_dev->kdrv == RTE_PCI_KDRV_UNKNOWN && |
| 681 | (!pci_dev->device.devargs || |
| 682 | pci_dev->device.devargs->bus != |
| 683 | rte_bus_find_by_name("pci"))) { |
| 684 | PMD_INIT_LOG(INFO, |
| 685 | "skip kernel managed virtio device."); |
| 686 | return 1; |
| 687 | } |
| 688 | return -1; |
| 689 | } |
| 690 | |
| 691 | VIRTIO_OPS(hw) = &legacy_ops; |
| 692 | dev->modern = false; |
| 693 | |
| 694 | msix_detect: |
| 695 | VIRTIO_OPS(hw)->intr_detect(hw); |
| 696 | |
| 697 | return 0; |
| 698 | } |
| 699 | |
| 700 | void vtpci_legacy_ioport_unmap(struct virtio_hw *hw) |
| 701 | { |
no test coverage detected