diff options
Diffstat (limited to 'drivers/net/virtio/virtio_pci.c')
| -rw-r--r-- | drivers/net/virtio/virtio_pci.c | 65 |
1 files changed, 48 insertions, 17 deletions
diff --git a/drivers/net/virtio/virtio_pci.c b/drivers/net/virtio/virtio_pci.c index 6bd22e54..b6a3c80b 100644 --- a/drivers/net/virtio/virtio_pci.c +++ b/drivers/net/virtio/virtio_pci.c @@ -567,16 +567,18 @@ virtio_read_caps(struct rte_pci_device *dev, struct virtio_hw *hw) } ret = rte_pci_read_config(dev, &pos, 1, PCI_CAPABILITY_LIST); - if (ret < 0) { - PMD_INIT_LOG(DEBUG, "failed to read pci capability list"); + if (ret != 1) { + PMD_INIT_LOG(DEBUG, + "failed to read pci capability list, ret %d", ret); return -1; } 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); + ret = rte_pci_read_config(dev, &cap, 2, pos); + if (ret != 2) { + PMD_INIT_LOG(DEBUG, + "failed to read pci cap at pos: %x ret %d", + pos, ret); break; } @@ -586,7 +588,16 @@ virtio_read_caps(struct rte_pci_device *dev, struct virtio_hw *hw) * 1st byte is cap ID; 2nd byte is the position of next * cap; next two bytes are the flags. */ - uint16_t flags = ((uint16_t *)&cap)[1]; + uint16_t flags; + + ret = rte_pci_read_config(dev, &flags, sizeof(flags), + pos + 2); + if (ret != sizeof(flags)) { + PMD_INIT_LOG(DEBUG, + "failed to read pci cap at pos:" + " %x ret %d", pos + 2, ret); + break; + } if (flags & PCI_MSIX_ENABLE) hw->use_msix = VIRTIO_MSIX_ENABLED; @@ -601,6 +612,14 @@ virtio_read_caps(struct rte_pci_device *dev, struct virtio_hw *hw) goto next; } + ret = rte_pci_read_config(dev, &cap, sizeof(cap), pos); + if (ret != sizeof(cap)) { + PMD_INIT_LOG(DEBUG, + "failed to read pci cap at pos: %x ret %d", + pos, ret); + break; + } + PMD_INIT_LOG(DEBUG, "[%2x] cfg type: %u, bar: %u, offset: %04x, len: %u", pos, cap.cfg_type, cap.bar, cap.offset, cap.length); @@ -689,25 +708,37 @@ 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"); + if (ret != 1) { + PMD_INIT_LOG(DEBUG, + "failed to read pci capability list, ret %d", ret); 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); + uint8_t cap[2]; + + ret = rte_pci_read_config(dev, cap, sizeof(cap), pos); + if (ret != sizeof(cap)) { + PMD_INIT_LOG(DEBUG, + "failed to read pci cap at pos: %x ret %d", + pos, ret); break; } - if (cap.cap_vndr == PCI_CAP_ID_MSIX) { - uint16_t flags = ((uint16_t *)&cap)[1]; + if (cap[0] == PCI_CAP_ID_MSIX) { + uint16_t flags; + + ret = rte_pci_read_config(dev, &flags, sizeof(flags), + pos + sizeof(cap)); + if (ret != sizeof(flags)) { + PMD_INIT_LOG(DEBUG, + "failed to read pci cap at pos:" + " %x ret %d", pos + 2, ret); + break; + } if (flags & PCI_MSIX_ENABLE) return VIRTIO_MSIX_ENABLED; @@ -715,7 +746,7 @@ vtpci_msix_detect(struct rte_pci_device *dev) return VIRTIO_MSIX_DISABLED; } - pos = cap.cap_next; + pos = cap[1]; } return VIRTIO_MSIX_NONE; |