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# 31 32#include <sys/types.h> 33 34# 35# This is optional interface to virtio mmio backend. 36# Useful when backend is implemented not by the hardware but software, e.g. 37# by using another cpu core. 38# 39 40INTERFACE virtio_mmio; 41 42CODE { 43 static int 44 virtio_mmio_prewrite(device_t dev, size_t offset, int val) 45 { 46 47 return (1); 48 } 49 50 static int 51 virtio_mmio_note(device_t dev, size_t offset, int val) 52 { 53 54 return (1); 55 } 56 57 static int 58 virtio_mmio_setup_intr(device_t dev, device_t mmio_dev, 59 void *handler, void *ih_user) 60 { 61 62 return (1); 63 } 64}; 65 66# 67# Inform backend we are going to write data at offset. 68# 69METHOD int prewrite { 70 device_t dev; 71 size_t offset; 72 int val; 73} DEFAULT virtio_mmio_prewrite; 74 75# 76# Inform backend we have data wrotten to offset. 77# 78METHOD int note { 79 device_t dev; 80 size_t offset; 81 int val; 82} DEFAULT virtio_mmio_note; 83 84# 85# Inform backend we are going to poll virtqueue. 86# 87METHOD int poll { 88 device_t dev; 89}; 90 91# 92# Setup backend-specific interrupts. 93# 94METHOD int setup_intr { 95 device_t dev; 96 device_t mmio_dev; 97 void *handler; 98 void *ih_user; 99} DEFAULT virtio_mmio_setup_intr; 100