diff options
Diffstat (limited to 'src/vnet/devices/virtio/pci.c')
| -rw-r--r-- | src/vnet/devices/virtio/pci.c | 174 |
1 files changed, 147 insertions, 27 deletions
diff --git a/src/vnet/devices/virtio/pci.c b/src/vnet/devices/virtio/pci.c index ab21147aca9..c956e7b75fa 100644 --- a/src/vnet/devices/virtio/pci.c +++ b/src/vnet/devices/virtio/pci.c @@ -110,7 +110,7 @@ virtio_pci_legacy_write_config (vlib_main_t * vm, virtio_if_t * vif, } static u64 -virtio_pci_legacy_get_features (vlib_main_t * vm, virtio_if_t * vif) +virtio_pci_legacy_get_host_features (vlib_main_t * vm, virtio_if_t * vif) { u32 features; vlib_pci_read_io_u32 (vm, vif->pci_dev_handle, VIRTIO_PCI_HOST_FEATURES, @@ -119,8 +119,18 @@ virtio_pci_legacy_get_features (vlib_main_t * vm, virtio_if_t * vif) } static u32 -virtio_pci_legacy_set_features (vlib_main_t * vm, virtio_if_t * vif, - u64 features) +virtio_pci_legacy_get_guest_features (vlib_main_t * vm, virtio_if_t * vif) +{ + u32 feature = 0; + vlib_pci_read_io_u32 (vm, vif->pci_dev_handle, VIRTIO_PCI_GUEST_FEATURES, + &feature); + vif->features = feature; + return feature; +} + +static u32 +virtio_pci_legacy_set_guest_features (vlib_main_t * vm, virtio_if_t * vif, + u64 features) { if ((features >> 32) != 0) { @@ -555,6 +565,47 @@ virtio_pci_send_ctrl_msg (vlib_main_t * vm, virtio_if_t * vif, } static int +virtio_pci_disable_offload (vlib_main_t * vm, virtio_if_t * vif) +{ + struct virtio_ctrl_msg offload_hdr; + virtio_net_ctrl_ack status = VIRTIO_NET_ERR; + + offload_hdr.ctrl.class = VIRTIO_NET_CTRL_GUEST_OFFLOADS; + offload_hdr.ctrl.cmd = VIRTIO_NET_CTRL_GUEST_OFFLOADS_SET; + offload_hdr.status = VIRTIO_NET_ERR; + u64 offloads = 0ULL; + clib_memcpy (offload_hdr.data, &offloads, sizeof (offloads)); + + status = + virtio_pci_send_ctrl_msg (vm, vif, &offload_hdr, sizeof (offloads)); + virtio_log_debug (vif, "disable offloads"); + vif->remote_features = virtio_pci_legacy_get_host_features (vm, vif); + virtio_pci_legacy_get_guest_features (vm, vif); + return status; +} + +static int +virtio_pci_enable_checksum_offload (vlib_main_t * vm, virtio_if_t * vif) +{ + struct virtio_ctrl_msg csum_offload_hdr; + virtio_net_ctrl_ack status = VIRTIO_NET_ERR; + + csum_offload_hdr.ctrl.class = VIRTIO_NET_CTRL_GUEST_OFFLOADS; + csum_offload_hdr.ctrl.cmd = VIRTIO_NET_CTRL_GUEST_OFFLOADS_SET; + csum_offload_hdr.status = VIRTIO_NET_ERR; + u64 offloads = 0ULL; + offloads |= VIRTIO_FEATURE (VIRTIO_NET_F_GUEST_CSUM); + clib_memcpy (csum_offload_hdr.data, &offloads, sizeof (offloads)); + + status = + virtio_pci_send_ctrl_msg (vm, vif, &csum_offload_hdr, sizeof (offloads)); + virtio_log_debug (vif, "enable checksum offload"); + vif->remote_features = virtio_pci_legacy_get_host_features (vm, vif); + virtio_pci_legacy_get_guest_features (vm, vif); + return status; +} + +static int virtio_pci_enable_gso (vlib_main_t * vm, virtio_if_t * vif) { struct virtio_ctrl_msg gso_hdr; @@ -565,16 +616,78 @@ virtio_pci_enable_gso (vlib_main_t * vm, virtio_if_t * vif) gso_hdr.status = VIRTIO_NET_ERR; u64 offloads = VIRTIO_FEATURE (VIRTIO_NET_F_GUEST_CSUM) | VIRTIO_FEATURE (VIRTIO_NET_F_GUEST_TSO4) - | VIRTIO_FEATURE (VIRTIO_NET_F_GUEST_TSO6) - | VIRTIO_FEATURE (VIRTIO_NET_F_GUEST_UFO); + | VIRTIO_FEATURE (VIRTIO_NET_F_GUEST_TSO6); clib_memcpy (gso_hdr.data, &offloads, sizeof (offloads)); status = virtio_pci_send_ctrl_msg (vm, vif, &gso_hdr, sizeof (offloads)); virtio_log_debug (vif, "enable gso"); + vif->remote_features = virtio_pci_legacy_get_host_features (vm, vif); + virtio_pci_legacy_get_guest_features (vm, vif); return status; } static int +virtio_pci_offloads (vlib_main_t * vm, virtio_if_t * vif, int gso_enabled, + int csum_offload_enabled) +{ + vnet_main_t *vnm = vnet_get_main (); + vnet_hw_interface_t *hw = vnet_get_hw_interface (vnm, vif->hw_if_index); + + if ((vif->features & VIRTIO_FEATURE (VIRTIO_NET_F_CTRL_VQ)) && + (vif->features & VIRTIO_FEATURE (VIRTIO_NET_F_CTRL_GUEST_OFFLOADS))) + { + if (gso_enabled + && (vif->features & (VIRTIO_FEATURE (VIRTIO_NET_F_HOST_TSO4) | + VIRTIO_FEATURE (VIRTIO_NET_F_HOST_TSO6)))) + { + if (virtio_pci_enable_gso (vm, vif)) + { + virtio_log_warning (vif, "gso is not enabled"); + } + else + { + vif->gso_enabled = 1; + vif->csum_offload_enabled = 0; + hw->flags |= VNET_HW_INTERFACE_FLAG_SUPPORTS_GSO | + VNET_HW_INTERFACE_FLAG_SUPPORTS_TX_L4_CKSUM_OFFLOAD; + } + } + else if (csum_offload_enabled + && (vif->features & VIRTIO_FEATURE (VIRTIO_NET_F_CSUM))) + { + if (virtio_pci_enable_checksum_offload (vm, vif)) + { + virtio_log_warning (vif, "checksum offload is not enabled"); + } + else + { + vif->csum_offload_enabled = 1; + vif->gso_enabled = 0; + hw->flags &= ~VNET_HW_INTERFACE_FLAG_SUPPORTS_GSO; + hw->flags |= + VNET_HW_INTERFACE_FLAG_SUPPORTS_TX_L4_CKSUM_OFFLOAD; + } + } + else + { + if (virtio_pci_disable_offload (vm, vif)) + { + virtio_log_warning (vif, "offloads are not disabled"); + } + else + { + vif->csum_offload_enabled = 0; + vif->gso_enabled = 0; + hw->flags &= ~(VNET_HW_INTERFACE_FLAG_SUPPORTS_GSO | + VNET_HW_INTERFACE_FLAG_SUPPORTS_TX_L4_CKSUM_OFFLOAD); + } + } + } + + return 0; +} + +static int virtio_pci_enable_multiqueue (vlib_main_t * vm, virtio_if_t * vif, u16 num_queues) { @@ -770,13 +883,14 @@ virtio_negotiate_features (vlib_main_t * vm, virtio_if_t * vif, vif->features &= ~VIRTIO_FEATURE (VIRTIO_NET_F_MTU); } - vif->features = virtio_pci_legacy_set_features (vm, vif, vif->features); + vif->features = + virtio_pci_legacy_set_guest_features (vm, vif, vif->features); } void virtio_pci_read_device_feature (vlib_main_t * vm, virtio_if_t * vif) { - vif->remote_features = virtio_pci_legacy_get_features (vm, vif); + vif->remote_features = virtio_pci_legacy_get_host_features (vm, vif); } int @@ -1208,30 +1322,17 @@ virtio_pci_create_if (vlib_main_t * vm, virtio_pci_create_if_args_t * args) else vnet_hw_interface_set_flags (vnm, vif->hw_if_index, 0); - if (vif->features & VIRTIO_FEATURE (VIRTIO_NET_F_CTRL_VQ)) + virtio_pci_offloads (vm, vif, args->gso_enabled, + args->checksum_offload_enabled); + + if ((vif->features & VIRTIO_FEATURE (VIRTIO_NET_F_CTRL_VQ)) && + (vif->features & VIRTIO_FEATURE (VIRTIO_NET_F_MQ))) { - if (vif->features & VIRTIO_FEATURE (VIRTIO_NET_F_CTRL_GUEST_OFFLOADS) && - args->gso_enabled) - { - if (virtio_pci_enable_gso (vm, vif)) - { - virtio_log_warning (vif, "gso is not enabled"); - } - else - { - vif->gso_enabled = 1; - hw->flags |= VNET_HW_INTERFACE_FLAG_SUPPORTS_GSO; - } - } - if (vif->features & VIRTIO_FEATURE (VIRTIO_NET_F_MQ)) - { - if (virtio_pci_enable_multiqueue (vm, vif, vif->max_queue_pairs)) - virtio_log_warning (vif, "multiqueue is not set"); - } + if (virtio_pci_enable_multiqueue (vm, vif, vif->max_queue_pairs)) + virtio_log_warning (vif, "multiqueue is not set"); } return; - error: virtio_pci_delete_if (vm, vif); args->rv = VNET_API_ERROR_INVALID_INTERFACE; @@ -1325,6 +1426,25 @@ virtio_pci_delete_if (vlib_main_t * vm, virtio_if_t * vif) return 0; } +int +virtio_pci_enable_disable_offloads (vlib_main_t * vm, virtio_if_t * vif, + int gso_enabled, + int checksum_offload_enabled, + int offloads_disabled) +{ + if (vif->type != VIRTIO_IF_TYPE_PCI) + return VNET_API_ERROR_INVALID_INTERFACE; + + if (gso_enabled) + virtio_pci_offloads (vm, vif, 1, 0); + else if (checksum_offload_enabled) + virtio_pci_offloads (vm, vif, 0, 1); + else if (offloads_disabled) + virtio_pci_offloads (vm, vif, 0, 0); + + return 0; +} + /* * fd.io coding-style-patch-verification: ON * |