1/*-
| 1/*-
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2 * This header is BSD licensed so anyone can use the definitions to implement 3 * compatible drivers/servers.
| 2 * Copyright (c) 2014, Bryan Venteicher <bryanv@FreeBSD.org> 3 * All rights reserved.
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4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright
| 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright
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9 * notice, this list of conditions and the following disclaimer.
| 9 * notice unmodified, this list of conditions, and the following 10 * disclaimer.
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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.
| 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution.
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13 * 3. Neither the name of IBM nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 17 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 18 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 19 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL IBM OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE.
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27 *
| 14 *
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28 * $FreeBSD: stable/10/sys/dev/virtio/virtio.h 252708 2013-07-04 17:59:09Z bryanv $
| 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 * 26 * $FreeBSD: stable/10/sys/dev/virtio/virtio.h 267312 2014-06-10 03:23:35Z bryanv $
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29 */ 30 31#ifndef _VIRTIO_H_ 32#define _VIRTIO_H_ 33
| 27 */ 28 29#ifndef _VIRTIO_H_ 30#define _VIRTIO_H_ 31
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| 32#include <dev/virtio/virtio_ids.h> 33
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34struct vq_alloc_info; 35
| 34struct vq_alloc_info; 35
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36/* VirtIO device IDs. */ 37#define VIRTIO_ID_NETWORK 0x01 38#define VIRTIO_ID_BLOCK 0x02 39#define VIRTIO_ID_CONSOLE 0x03 40#define VIRTIO_ID_ENTROPY 0x04 41#define VIRTIO_ID_BALLOON 0x05 42#define VIRTIO_ID_IOMEMORY 0x06 43#define VIRTIO_ID_SCSI 0x08 44#define VIRTIO_ID_9P 0x09 45 46/* Status byte for guest to report progress. */ 47#define VIRTIO_CONFIG_STATUS_RESET 0x00 48#define VIRTIO_CONFIG_STATUS_ACK 0x01 49#define VIRTIO_CONFIG_STATUS_DRIVER 0x02 50#define VIRTIO_CONFIG_STATUS_DRIVER_OK 0x04 51#define VIRTIO_CONFIG_STATUS_FAILED 0x80 52
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53/*
| 36/*
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54 * Generate interrupt when the virtqueue ring is 55 * completely used, even if we've suppressed them. 56 */ 57#define VIRTIO_F_NOTIFY_ON_EMPTY (1 << 24) 58 59/* 60 * The guest should never negotiate this feature; it 61 * is used to detect faulty drivers. 62 */ 63#define VIRTIO_F_BAD_FEATURE (1 << 30) 64 65/* 66 * Some VirtIO feature bits (currently bits 28 through 31) are 67 * reserved for the transport being used (eg. virtio_ring), the 68 * rest are per-device feature bits. 69 */ 70#define VIRTIO_TRANSPORT_F_START 28 71#define VIRTIO_TRANSPORT_F_END 32 72 73/*
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74 * Each virtqueue indirect descriptor list must be physically contiguous. 75 * To allow us to malloc(9) each list individually, limit the number 76 * supported to what will fit in one page. With 4KB pages, this is a limit 77 * of 256 descriptors. If there is ever a need for more, we can switch to 78 * contigmalloc(9) for the larger allocations, similar to what 79 * bus_dmamem_alloc(9) does. 80 * 81 * Note the sizeof(struct vring_desc) is 16 bytes.
--- 99 unchanged lines hidden --- | 37 * Each virtqueue indirect descriptor list must be physically contiguous. 38 * To allow us to malloc(9) each list individually, limit the number 39 * supported to what will fit in one page. With 4KB pages, this is a limit 40 * of 256 descriptors. If there is ever a need for more, we can switch to 41 * contigmalloc(9) for the larger allocations, similar to what 42 * bus_dmamem_alloc(9) does. 43 * 44 * Note the sizeof(struct vring_desc) is 16 bytes.
--- 99 unchanged lines hidden --- |