FreeBSD/Linux Kernel Cross Reference
sys/dev/virtio/mmio/virtio_mmio.h

     /*-
      * Copyright (c) 2014 Ruslan Bukin <br@bsdpad.com>
      * All rights reserved.
      *
      * This software was developed by SRI International and the University of
      * Cambridge Computer Laboratory under DARPA/AFRL contract (FA8750-10-C-0237)
      * ("CTSRD"), as part of the DARPA CRASH research programme.
      *
      * Redistribution and use in source and binary forms, with or without
     * modification, are permitted provided that the following conditions
     * are met:
     * 1. Redistributions of source code must retain the above copyright
     *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     *
     * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
     * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
     * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     * SUCH DAMAGE.
     *
     * $FreeBSD$
     */
    
    #ifndef _VIRTIO_MMIO_H
    #define _VIRTIO_MMIO_H
    
    DECLARE_CLASS(vtmmio_driver);
    
    struct vtmmio_virtqueue;
    
    struct vtmmio_softc {
            device_t                        dev;
            device_t                        platform;
            struct resource                 *res[2];
    
            uint64_t                        vtmmio_features;
            uint32_t                        vtmmio_flags;
            uint32_t                        vtmmio_version;
    
            /* This "bus" will only ever have one child. */
            device_t                        vtmmio_child_dev;
            struct virtio_feature_desc      *vtmmio_child_feat_desc;
    
            int                             vtmmio_nvqs;
            struct vtmmio_virtqueue         *vtmmio_vqs;
            void                            *ih;
    };
    
    int vtmmio_probe(device_t);
    int vtmmio_attach(device_t);
    
    #define VIRTIO_MMIO_MAGIC_VALUE         0x000
    #define VIRTIO_MMIO_VERSION             0x004
    #define VIRTIO_MMIO_DEVICE_ID           0x008
    #define VIRTIO_MMIO_VENDOR_ID           0x00c
    #define VIRTIO_MMIO_HOST_FEATURES       0x010
    #define VIRTIO_MMIO_HOST_FEATURES_SEL   0x014
    #define VIRTIO_MMIO_GUEST_FEATURES      0x020
    #define VIRTIO_MMIO_GUEST_FEATURES_SEL  0x024
    #define VIRTIO_MMIO_GUEST_PAGE_SIZE     0x028   /* version 1 only */
    #define VIRTIO_MMIO_QUEUE_SEL           0x030
    #define VIRTIO_MMIO_QUEUE_NUM_MAX       0x034
    #define VIRTIO_MMIO_QUEUE_NUM           0x038
    #define VIRTIO_MMIO_QUEUE_ALIGN         0x03c   /* version 1 only */
    #define VIRTIO_MMIO_QUEUE_PFN           0x040   /* version 1 only */
    #define VIRTIO_MMIO_QUEUE_READY         0x044   /* requires version 2 */
    #define VIRTIO_MMIO_QUEUE_NOTIFY        0x050
    #define VIRTIO_MMIO_INTERRUPT_STATUS    0x060
    #define VIRTIO_MMIO_INTERRUPT_ACK       0x064
    #define VIRTIO_MMIO_STATUS              0x070
    #define VIRTIO_MMIO_QUEUE_DESC_LOW      0x080   /* requires version 2 */
    #define VIRTIO_MMIO_QUEUE_DESC_HIGH     0x084   /* requires version 2 */
    #define VIRTIO_MMIO_QUEUE_AVAIL_LOW     0x090   /* requires version 2 */
    #define VIRTIO_MMIO_QUEUE_AVAIL_HIGH    0x094   /* requires version 2 */
    #define VIRTIO_MMIO_QUEUE_USED_LOW      0x0a0   /* requires version 2 */
    #define VIRTIO_MMIO_QUEUE_USED_HIGH     0x0a4   /* requires version 2 */
    #define VIRTIO_MMIO_CONFIG_GENERATION   0x0fc   /* requires version 2 */
    #define VIRTIO_MMIO_CONFIG              0x100
    #define VIRTIO_MMIO_MAGIC_VIRT          0x74726976
    #define VIRTIO_MMIO_INT_VRING           (1 << 0)
    #define VIRTIO_MMIO_INT_CONFIG          (1 << 1)
    #define VIRTIO_MMIO_VRING_ALIGN         4096
    
    #endif /* _VIRTIO_MMIO_H */

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