Mohsin Kazmi | a0a6833 | 2020-07-16 12:55:42 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright (c) 2018 Cisco and/or its affiliates. |
| 3 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 4 | * you may not use this file except in compliance with the License. |
| 5 | * You may obtain a copy of the License at: |
| 6 | * |
| 7 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 8 | * |
| 9 | * Unless required by applicable law or agreed to in writing, software |
| 10 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 11 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 12 | * See the License for the specific language governing permissions and |
| 13 | * limitations under the License. |
| 14 | */ |
| 15 | |
| 16 | #ifndef __included_virtio_pci_legacy_h__ |
| 17 | #define __included_virtio_pci_legacy_h__ |
| 18 | |
| 19 | /* |
| 20 | * VirtIO Header, located in BAR 0. |
| 21 | */ |
| 22 | #define VIRTIO_PCI_HOST_FEATURES 0 /* host's supported features (32bit, RO) */ |
| 23 | #define VIRTIO_PCI_GUEST_FEATURES 4 /* guest's supported features (32, RW) */ |
| 24 | #define VIRTIO_PCI_QUEUE_PFN 8 /* physical address of VQ (32, RW) */ |
| 25 | #define VIRTIO_PCI_QUEUE_NUM 12 /* number of ring entries (16, RO) */ |
| 26 | #define VIRTIO_PCI_QUEUE_SEL 14 /* current VQ selection (16, RW) */ |
| 27 | #define VIRTIO_PCI_QUEUE_NOTIFY 16 /* notify host regarding VQ (16, RW) */ |
| 28 | #define VIRTIO_PCI_STATUS 18 /* device status register (8, RW) */ |
| 29 | #define VIRTIO_PCI_ISR 19 /* interrupt status register, reading |
| 30 | * also clears the register (8, RO) */ |
| 31 | /* Only if MSIX is enabled: */ |
| 32 | #define VIRTIO_MSI_CONFIG_VECTOR 20 /* configuration change vector (16, RW) */ |
| 33 | #define VIRTIO_MSI_QUEUE_VECTOR 22 /* vector for selected VQ notifications |
| 34 | (16, RW) */ |
| 35 | #define VIRTIO_PCI_QUEUE_ADDR_SHIFT 12 |
| 36 | |
| 37 | #endif /* __included_virtio_pci_legacy_h__ */ |
| 38 | /* |
| 39 | * fd.io coding-style-patch-verification: ON |
| 40 | * |
| 41 | * Local Variables: |
| 42 | * eval: (c-set-style "gnu") |
| 43 | * End: |
| 44 | */ |