86 lines
2.3 KiB
C
86 lines
2.3 KiB
C
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/*-
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* Copyright (c) 2011 NetApp, Inc.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY NETAPP, INC ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL NETAPP, INC OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _VIRTIO_H_
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#define _VIRTIO_H_
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#define VRING_ALIGN 4096
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#define VRING_DESC_F_NEXT (1 << 0)
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#define VRING_DESC_F_WRITE (1 << 1)
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#define VRING_DESC_F_INDIRECT (1 << 2)
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#define VRING_AVAIL_F_NO_INTERRUPT 1
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struct virtio_desc {
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uint64_t vd_addr;
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uint32_t vd_len;
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uint16_t vd_flags;
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uint16_t vd_next;
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} __packed;
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struct virtio_used {
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uint32_t vu_idx;
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uint32_t vu_tlen;
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} __packed;
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/*
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* PFN register shift amount
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*/
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#define VRING_PFN 12
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/*
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* Virtio device types
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*/
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#define VIRTIO_TYPE_NET 1
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#define VIRTIO_TYPE_BLOCK 2
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/*
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* PCI vendor/device IDs
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*/
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#define VIRTIO_VENDOR 0x1AF4
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#define VIRTIO_DEV_NET 0x1000
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#define VIRTIO_DEV_BLOCK 0x1001
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/*
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* PCI config space constants
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*/
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#define VTCFG_R_HOSTCAP 0
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#define VTCFG_R_GUESTCAP 4
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#define VTCFG_R_PFN 8
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#define VTCFG_R_QNUM 12
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#define VTCFG_R_QSEL 14
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#define VTCFG_R_QNOTIFY 16
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#define VTCFG_R_STATUS 18
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#define VTCFG_R_ISR 19
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#define VTCFG_R_CFG0 20 /* No MSI-X */
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#define VTCFG_R_CFG1 24 /* With MSI-X */
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#define VTCFG_R_MSIX 20
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#endif /* _VIRTIO_H_ */
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