2 * Copyright (c) 2011 NetApp, Inc.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY NETAPP, INC ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL NETAPP, INC OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 #define VRING_ALIGN 4096
34 #define VRING_DESC_F_NEXT (1 << 0)
35 #define VRING_DESC_F_WRITE (1 << 1)
36 #define VRING_DESC_F_INDIRECT (1 << 2)
38 #define VRING_AVAIL_F_NO_INTERRUPT 1
53 * PFN register shift amount
60 #define VIRTIO_TYPE_NET 1
61 #define VIRTIO_TYPE_BLOCK 2
64 * PCI vendor/device IDs
66 #define VIRTIO_VENDOR 0x1AF4
67 #define VIRTIO_DEV_NET 0x1000
68 #define VIRTIO_DEV_BLOCK 0x1001
71 * PCI config space constants
73 #define VTCFG_R_HOSTCAP 0
74 #define VTCFG_R_GUESTCAP 4
76 #define VTCFG_R_QNUM 12
77 #define VTCFG_R_QSEL 14
78 #define VTCFG_R_QNOTIFY 16
79 #define VTCFG_R_STATUS 18
80 #define VTCFG_R_ISR 19
81 #define VTCFG_R_CFG0 20 /* No MSI-X */
82 #define VTCFG_R_CFG1 24 /* With MSI-X */
83 #define VTCFG_R_MSIX 20
85 #endif /* _VIRTIO_H_ */