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 #include "opt_acpi.h" 41 42 #include <sys/cdefs.h> 43 __FBSDID("$FreeBSD$"); 44 45 #include <sys/param.h> 46 #include <sys/systm.h> 47 #include <sys/bus.h> 48 #include <sys/kernel.h> 49 #include <sys/module.h> 50 51 #include <contrib/dev/acpica/include/acpi.h> 52 #include <dev/acpica/acpivar.h> 53 54 #include <dev/virtio/mmio/virtio_mmio.h> 55 56 static int vtmmio_acpi_probe(device_t); 57 58 static device_method_t vtmmio_acpi_methods[] = { 59 /* Device interface. */ 60 DEVMETHOD(device_probe, vtmmio_acpi_probe), 61 62 DEVMETHOD_END 63 }; 64 65 DEFINE_CLASS_1(virtio_mmio, vtmmio_acpi_driver, vtmmio_acpi_methods, 66 sizeof(struct vtmmio_softc), vtmmio_driver); 67 68 static devclass_t vtmmio_acpi_devclass; 69 70 DRIVER_MODULE(virtio_mmio, acpi, vtmmio_acpi_driver, vtmmio_acpi_devclass, 0,0); 71 MODULE_DEPEND(virtio_mmio, acpi, 1, 1, 1); 72 73 static int 74 vtmmio_acpi_probe(device_t dev) 75 { 76 ACPI_HANDLE h; 77 78 if ((h = acpi_get_handle(dev)) == NULL) 79 return (ENXIO); 80 81 if (!acpi_MatchHid(h, "LNRO0005")) 82 return (ENXIO); 83 84 device_set_desc(dev, "VirtIO MMIO adapter"); 85 return (BUS_PROBE_DEFAULT); 86 } 87