1#- 2# Copyright (c) 2014 Ruslan Bukin <br@bsdpad.com> 3# All rights reserved. 4# 5# This software was developed by SRI International and the University of 6# Cambridge Computer Laboratory under DARPA/AFRL contract (FA8750-10-C-0237) 7# ("CTSRD"), as part of the DARPA CRASH research programme. 8# 9# Redistribution and use in source and binary forms, with or without 10# modification, are permitted provided that the following conditions 11# are met: 12# 1. Redistributions of source code must retain the above copyright 13# notice, this list of conditions and the following disclaimer. 14# 2. Redistributions in binary form must reproduce the above copyright 15# notice, this list of conditions and the following disclaimer in the 16# documentation and/or other materials provided with the distribution. 17# 18# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 19# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 22# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28# SUCH DAMAGE. 29# 30# $FreeBSD$ 31# 32 33#include <sys/types.h> 34 35# 36# This is optional interface to virtio mmio backend. 37# Useful when backend is implemented not by the hardware but software, e.g. 38# by using another cpu core. 39# 40 41INTERFACE virtio_mmio; 42 43CODE { 44 static int 45 virtio_mmio_prewrite(device_t dev, size_t offset, int val) 46 { 47 48 return (1); 49 } 50 51 static int 52 virtio_mmio_note(device_t dev, size_t offset, int val) 53 { 54 55 return (1); 56 } 57 58 static int 59 virtio_mmio_setup_intr(device_t dev, device_t mmio_dev, 60 void *handler, void *ih_user) 61 { 62 63 return (1); 64 } 65}; 66 67# 68# Inform backend we are going to write data at offset. 69# 70METHOD int prewrite { 71 device_t dev; 72 size_t offset; 73 int val; 74} DEFAULT virtio_mmio_prewrite; 75 76# 77# Inform backend we have data wrotten to offset. 78# 79METHOD int note { 80 device_t dev; 81 size_t offset; 82 int val; 83} DEFAULT virtio_mmio_note; 84 85# 86# Inform backend we are going to poll virtqueue. 87# 88METHOD int poll { 89 device_t dev; 90}; 91 92# 93# Setup backend-specific interrupts. 94# 95METHOD int setup_intr { 96 device_t dev; 97 device_t mmio_dev; 98 void *handler; 99 void *ih_user; 100} DEFAULT virtio_mmio_setup_intr; 101