| /* |
| * 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: |
| */ |