diff options
Diffstat (limited to 'src/vnet/devices/virtio/virtio_pci_legacy.h')
| -rw-r--r-- | src/vnet/devices/virtio/virtio_pci_legacy.h | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/src/vnet/devices/virtio/virtio_pci_legacy.h b/src/vnet/devices/virtio/virtio_pci_legacy.h new file mode 100644 index 00000000000..0db04c1966a --- /dev/null +++ b/src/vnet/devices/virtio/virtio_pci_legacy.h @@ -0,0 +1,44 @@ +/* + * Copyright (c) 2018 Cisco and/or its affiliates. + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at: + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +#ifndef __included_virtio_pci_legacy_h__ +#define __included_virtio_pci_legacy_h__ + +/* + * VirtIO Header, located in BAR 0. + */ +#define VIRTIO_PCI_HOST_FEATURES 0 /* host's supported features (32bit, RO) */ +#define VIRTIO_PCI_GUEST_FEATURES 4 /* guest's supported features (32, RW) */ +#define VIRTIO_PCI_QUEUE_PFN 8 /* physical address of VQ (32, RW) */ +#define VIRTIO_PCI_QUEUE_NUM 12 /* number of ring entries (16, RO) */ +#define VIRTIO_PCI_QUEUE_SEL 14 /* current VQ selection (16, RW) */ +#define VIRTIO_PCI_QUEUE_NOTIFY 16 /* notify host regarding VQ (16, RW) */ +#define VIRTIO_PCI_STATUS 18 /* device status register (8, RW) */ +#define VIRTIO_PCI_ISR 19 /* interrupt status register, reading + * also clears the register (8, RO) */ +/* Only if MSIX is enabled: */ +#define VIRTIO_MSI_CONFIG_VECTOR 20 /* configuration change vector (16, RW) */ +#define VIRTIO_MSI_QUEUE_VECTOR 22 /* vector for selected VQ notifications + (16, RW) */ +#define VIRTIO_PCI_QUEUE_ADDR_SHIFT 12 + +#endif /* __included_virtio_pci_legacy_h__ */ +/* + * fd.io coding-style-patch-verification: ON + * + * Local Variables: + * eval: (c-set-style "gnu") + * End: + */ |