1 /*- 2 * Copyright (c) 2014 Ruslan Bukin <br@bsdpad.com> 3 * Copyright (c) 2014 The FreeBSD Foundation 4 * All rights reserved. 5 * 6 * This software was developed by SRI International and the University of 7 * Cambridge Computer Laboratory under DARPA/AFRL contract (FA8750-10-C-0237) 8 * ("CTSRD"), as part of the DARPA CRASH research programme. 9 * 10 * Portions of this software were developed by Andrew Turner 11 * under sponsorship from the FreeBSD Foundation. 12 * 13 * Redistribution and use in source and binary forms, with or without 14 * modification, are permitted provided that the following conditions 15 * are met: 16 * 1. Redistributions of source code must retain the above copyright 17 * notice, this list of conditions and the following disclaimer. 18 * 2. Redistributions in binary form must reproduce the above copyright 19 * notice, this list of conditions and the following disclaimer in the 20 * documentation and/or other materials provided with the distribution. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 */ 34 35 /* 36 * VirtIO MMIO interface. 37 * This driver is heavily based on VirtIO PCI interface driver. 38 */ 39 40 /* 41 * FDT example: 42 * virtio_block@1000 { 43 * compatible = "virtio,mmio"; 44 * reg = <0x1000 0x100>; 45 * interrupts = <63>; 46 * interrupt-parent = <&GIC>; 47 * }; 48 */ 49 50 #include "opt_platform.h" 51 52 #include <sys/param.h> 53 #include <sys/systm.h> 54 #include <sys/bus.h> 55 #include <sys/kernel.h> 56 #include <sys/module.h> 57 58 #include <dev/fdt/fdt_common.h> 59 #include <dev/ofw/openfirm.h> 60 #include <dev/ofw/ofw_bus.h> 61 #include <dev/ofw/ofw_bus_subr.h> 62 63 #include <dev/virtio/mmio/virtio_mmio.h> 64 65 static int vtmmio_fdt_probe(device_t); 66 67 static device_method_t vtmmio_fdt_methods[] = { 68 /* Device interface. */ 69 DEVMETHOD(device_probe, vtmmio_fdt_probe), 70 71 DEVMETHOD_END 72 }; 73 74 DEFINE_CLASS_1(virtio_mmio, vtmmio_fdt_driver, vtmmio_fdt_methods, 75 sizeof(struct vtmmio_softc), vtmmio_driver); 76 77 DRIVER_MODULE(virtio_mmio, simplebus, vtmmio_fdt_driver, 0, 0); 78 DRIVER_MODULE(virtio_mmio, ofwbus, vtmmio_fdt_driver, 0,0); 79 MODULE_DEPEND(virtio_mmio, simplebus, 1, 1, 1); 80 MODULE_DEPEND(virtio_mmio, virtio, 1, 1, 1); 81 82 static int 83 vtmmio_fdt_probe(device_t dev) 84 { 85 86 if (!ofw_bus_status_okay(dev)) 87 return (ENXIO); 88 89 if (!ofw_bus_is_compatible(dev, "virtio,mmio")) 90 return (ENXIO); 91 92 return (vtmmio_probe(dev)); 93 } 94