diff options
Diffstat (limited to 'drivers/net/virtio/virtio_pci.c')
| -rw-r--r-- | drivers/net/virtio/virtio_pci.c | 43 |
1 files changed, 41 insertions, 2 deletions
diff --git a/drivers/net/virtio/virtio_pci.c b/drivers/net/virtio/virtio_pci.c index 55b717c0..9574498f 100644 --- a/drivers/net/virtio/virtio_pci.c +++ b/drivers/net/virtio/virtio_pci.c @@ -57,7 +57,8 @@ * The remaining space is defined by each driver as the per-driver * configuration space. */ -#define VIRTIO_PCI_CONFIG(hw) (((hw)->use_msix) ? 24 : 20) +#define VIRTIO_PCI_CONFIG(hw) \ + (((hw)->use_msix == VIRTIO_MSIX_ENABLED) ? 24 : 20) static inline int check_vq_phys_addr_ok(struct virtqueue *vq) @@ -617,7 +618,9 @@ virtio_read_caps(struct rte_pci_device *dev, struct virtio_hw *hw) uint16_t flags = ((uint16_t *)&cap)[1]; if (flags & PCI_MSIX_ENABLE) - hw->use_msix = 1; + hw->use_msix = VIRTIO_MSIX_ENABLED; + else + hw->use_msix = VIRTIO_MSIX_DISABLED; } if (cap.cap_vndr != PCI_CAP_ID_VNDR) { @@ -710,3 +713,39 @@ vtpci_init(struct rte_pci_device *dev, struct virtio_hw *hw) return 0; } + +enum virtio_msix_status +vtpci_msix_detect(struct rte_pci_device *dev) +{ + uint8_t pos; + struct virtio_pci_cap cap; + int ret; + + ret = rte_pci_read_config(dev, &pos, 1, PCI_CAPABILITY_LIST); + if (ret < 0) { + PMD_INIT_LOG(DEBUG, "failed to read pci capability list"); + return VIRTIO_MSIX_NONE; + } + + while (pos) { + ret = rte_pci_read_config(dev, &cap, sizeof(cap), pos); + if (ret < 0) { + PMD_INIT_LOG(ERR, + "failed to read pci cap at pos: %x", pos); + break; + } + + if (cap.cap_vndr == PCI_CAP_ID_MSIX) { + uint16_t flags = ((uint16_t *)&cap)[1]; + + if (flags & PCI_MSIX_ENABLE) + return VIRTIO_MSIX_ENABLED; + else + return VIRTIO_MSIX_DISABLED; + } + + pos = cap.cap_next; + } + + return VIRTIO_MSIX_NONE; +} |