046096d5c7
The non-legacy virtio MMIO specification drops the use of PFNs and replaces them with physical addresses. Whilst many implementations are so-called transitional devices, also implementing the legacy specification, TinyEMU[1] does not. Device-specific configuration registers have also changed to being little-endian, and must be accessed using a single aligned access for registers up to 32 bits, and two 32-bit aligned accesses for 64-bit registers. [1] https://bellard.org/tinyemu/ Reviewed by: br, brooks (mentor) Approved by: br, brooks (mentor) Differential Revision: https://reviews.freebsd.org/D24681
92 lines
3.5 KiB
C
92 lines
3.5 KiB
C
/*-
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* Copyright (c) 2014 Ruslan Bukin <br@bsdpad.com>
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* All rights reserved.
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*
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* This software was developed by SRI International and the University of
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* Cambridge Computer Laboratory under DARPA/AFRL contract (FA8750-10-C-0237)
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* ("CTSRD"), as part of the DARPA CRASH research programme.
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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 THE AUTHOR AND CONTRIBUTORS ``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 THE AUTHOR 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_MMIO_H
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#define _VIRTIO_MMIO_H
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DECLARE_CLASS(vtmmio_driver);
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struct vtmmio_virtqueue;
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struct vtmmio_softc {
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device_t dev;
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device_t platform;
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struct resource *res[2];
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uint64_t vtmmio_features;
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uint32_t vtmmio_flags;
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uint32_t vtmmio_version;
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/* This "bus" will only ever have one child. */
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device_t vtmmio_child_dev;
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struct virtio_feature_desc *vtmmio_child_feat_desc;
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int vtmmio_nvqs;
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struct vtmmio_virtqueue *vtmmio_vqs;
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void *ih;
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};
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int vtmmio_attach(device_t);
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#define VIRTIO_MMIO_MAGIC_VALUE 0x000
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#define VIRTIO_MMIO_VERSION 0x004
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#define VIRTIO_MMIO_DEVICE_ID 0x008
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#define VIRTIO_MMIO_VENDOR_ID 0x00c
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#define VIRTIO_MMIO_HOST_FEATURES 0x010
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#define VIRTIO_MMIO_HOST_FEATURES_SEL 0x014
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#define VIRTIO_MMIO_GUEST_FEATURES 0x020
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#define VIRTIO_MMIO_GUEST_FEATURES_SEL 0x024
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#define VIRTIO_MMIO_GUEST_PAGE_SIZE 0x028 /* version 1 only */
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#define VIRTIO_MMIO_QUEUE_SEL 0x030
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#define VIRTIO_MMIO_QUEUE_NUM_MAX 0x034
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#define VIRTIO_MMIO_QUEUE_NUM 0x038
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#define VIRTIO_MMIO_QUEUE_ALIGN 0x03c /* version 1 only */
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#define VIRTIO_MMIO_QUEUE_PFN 0x040 /* version 1 only */
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#define VIRTIO_MMIO_QUEUE_READY 0x044 /* requires version 2 */
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#define VIRTIO_MMIO_QUEUE_NOTIFY 0x050
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#define VIRTIO_MMIO_INTERRUPT_STATUS 0x060
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#define VIRTIO_MMIO_INTERRUPT_ACK 0x064
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#define VIRTIO_MMIO_STATUS 0x070
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#define VIRTIO_MMIO_QUEUE_DESC_LOW 0x080 /* requires version 2 */
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#define VIRTIO_MMIO_QUEUE_DESC_HIGH 0x084 /* requires version 2 */
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#define VIRTIO_MMIO_QUEUE_AVAIL_LOW 0x090 /* requires version 2 */
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#define VIRTIO_MMIO_QUEUE_AVAIL_HIGH 0x094 /* requires version 2 */
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#define VIRTIO_MMIO_QUEUE_USED_LOW 0x0a0 /* requires version 2 */
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#define VIRTIO_MMIO_QUEUE_USED_HIGH 0x0a4 /* requires version 2 */
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#define VIRTIO_MMIO_CONFIG_GENERATION 0x100 /* requires version 2 */
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#define VIRTIO_MMIO_CONFIG 0x100
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#define VIRTIO_MMIO_INT_VRING (1 << 0)
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#define VIRTIO_MMIO_INT_CONFIG (1 << 1)
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#define VIRTIO_MMIO_VRING_ALIGN 4096
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#endif /* _VIRTIO_MMIO_H */
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