| Anthony Liguori | 3343660 | 2007-11-12 21:30:26 -0600 | [diff] [blame] | 1 | /* |
| 2 | * Virtio PCI driver |
| 3 | * |
| 4 | * This module allows virtio devices to be used over a virtual PCI device. |
| 5 | * This can be used with QEMU based VMMs like KVM or Xen. |
| 6 | * |
| 7 | * Copyright IBM Corp. 2007 |
| 8 | * |
| 9 | * Authors: |
| 10 | * Anthony Liguori <aliguori@us.ibm.com> |
| 11 | * |
| 12 | * This work is licensed under the terms of the GNU GPL, version 2 or later. |
| 13 | * See the COPYING file in the top-level directory. |
| 14 | * |
| 15 | */ |
| 16 | |
| 17 | #ifndef _LINUX_VIRTIO_PCI_H |
| 18 | #define _LINUX_VIRTIO_PCI_H |
| 19 | |
| 20 | #include <linux/virtio_config.h> |
| 21 | |
| 22 | /* A 32-bit r/o bitmask of the features supported by the host */ |
| 23 | #define VIRTIO_PCI_HOST_FEATURES 0 |
| 24 | |
| 25 | /* A 32-bit r/w bitmask of features activated by the guest */ |
| 26 | #define VIRTIO_PCI_GUEST_FEATURES 4 |
| 27 | |
| 28 | /* A 32-bit r/w PFN for the currently selected queue */ |
| 29 | #define VIRTIO_PCI_QUEUE_PFN 8 |
| 30 | |
| 31 | /* A 16-bit r/o queue size for the currently selected queue */ |
| 32 | #define VIRTIO_PCI_QUEUE_NUM 12 |
| 33 | |
| 34 | /* A 16-bit r/w queue selector */ |
| 35 | #define VIRTIO_PCI_QUEUE_SEL 14 |
| 36 | |
| 37 | /* A 16-bit r/w queue notifier */ |
| 38 | #define VIRTIO_PCI_QUEUE_NOTIFY 16 |
| 39 | |
| 40 | /* An 8-bit device status register. */ |
| 41 | #define VIRTIO_PCI_STATUS 18 |
| 42 | |
| 43 | /* An 8-bit r/o interrupt status register. Reading the value will return the |
| 44 | * current contents of the ISR and will also clear it. This is effectively |
| 45 | * a read-and-acknowledge. */ |
| 46 | #define VIRTIO_PCI_ISR 19 |
| 47 | |
| 48 | /* The bit of the ISR which indicates a device configuration change. */ |
| 49 | #define VIRTIO_PCI_ISR_CONFIG 0x2 |
| 50 | |
| 51 | /* The remaining space is defined by each driver as the per-driver |
| 52 | * configuration space */ |
| 53 | #define VIRTIO_PCI_CONFIG 20 |
| 54 | |
| Anthony Liguori | 55a7c06 | 2008-01-28 09:59:59 -0600 | [diff] [blame] | 55 | /* Virtio ABI version, this must match exactly */ |
| 56 | #define VIRTIO_PCI_ABI_VERSION 0 |
| Anthony Liguori | 3343660 | 2007-11-12 21:30:26 -0600 | [diff] [blame] | 57 | #endif |