virtio_acpi.c revision 1.1
1 /* $NetBSD: virtio_acpi.c,v 1.1 2018/10/21 12:26:38 jmcneill Exp $ */ 2 3 /*- 4 * Copyright (c) 2018 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Jared McNeill <jmcneill (at) invisible.ca>. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 __KERNEL_RCSID(0, "$NetBSD: virtio_acpi.c,v 1.1 2018/10/21 12:26:38 jmcneill Exp $"); 34 35 #include <sys/param.h> 36 #include <sys/bus.h> 37 #include <sys/cpu.h> 38 #include <sys/device.h> 39 40 #include <dev/acpi/acpireg.h> 41 #include <dev/acpi/acpivar.h> 42 43 #define VIRTIO_PRIVATE 44 #include <dev/virtio/virtio_mmiovar.h> 45 46 struct virtio_acpi_softc { 47 struct virtio_mmio_softc sc_msc; 48 int sc_irq; 49 int sc_irqtype; 50 }; 51 52 static int virtio_acpi_match(device_t, cfdata_t, void *); 53 static void virtio_acpi_attach(device_t, device_t, void *); 54 static int virtio_acpi_rescan(device_t, const char *, const int *); 55 static int virtio_acpi_detach(device_t, int); 56 57 static int virtio_acpi_setup_interrupts(struct virtio_mmio_softc *); 58 static void virtio_acpi_free_interrupts(struct virtio_mmio_softc *); 59 60 CFATTACH_DECL3_NEW(virtio_acpi, sizeof(struct virtio_acpi_softc), 61 virtio_acpi_match, virtio_acpi_attach, virtio_acpi_detach, NULL, 62 virtio_acpi_rescan, (void *)voidop, DVF_DETACH_SHUTDOWN); 63 64 static const char * const compatible[] = { 65 "LNRO0005", 66 NULL 67 }; 68 69 static int 70 virtio_acpi_match(device_t parent, cfdata_t cf, void *aux) 71 { 72 struct acpi_attach_args *aa = aux; 73 74 if (aa->aa_node->ad_type != ACPI_TYPE_DEVICE) 75 return 0; 76 77 return acpi_match_hid(aa->aa_node->ad_devinfo, compatible); 78 } 79 80 static void 81 virtio_acpi_attach(device_t parent, device_t self, void *aux) 82 { 83 struct virtio_acpi_softc * const sc = device_private(self); 84 struct virtio_mmio_softc * const msc = &sc->sc_msc; 85 struct virtio_softc * const vsc = &msc->sc_sc; 86 struct acpi_attach_args *aa = aux; 87 struct acpi_resources res; 88 struct acpi_mem *mem; 89 struct acpi_irq *irq; 90 ACPI_STATUS rv; 91 int error; 92 93 msc->sc_iot = aa->aa_memt; 94 vsc->sc_dev = self; 95 vsc->sc_dmat = aa->aa_dmat; 96 97 rv = acpi_resource_parse(self, aa->aa_node->ad_handle, "_CRS", 98 &res, &acpi_resource_parse_ops_default); 99 if (ACPI_FAILURE(rv)) 100 return; 101 102 mem = acpi_res_mem(&res, 0); 103 if (mem == NULL) { 104 aprint_error_dev(self, "couldn't find mem resource\n"); 105 goto done; 106 } 107 108 irq = acpi_res_irq(&res, 0); 109 if (irq == NULL) { 110 aprint_error_dev(self, "couldn't find irq resource\n"); 111 goto done; 112 } 113 sc->sc_irq = irq->ar_irq; 114 sc->sc_irqtype = (irq->ar_type == ACPI_EDGE_SENSITIVE) ? IST_EDGE : IST_LEVEL; 115 116 error = bus_space_map(msc->sc_iot, mem->ar_base, mem->ar_length, 0, &msc->sc_ioh); 117 if (error) { 118 aprint_error_dev(self, "couldn't map registers\n"); 119 return; 120 } 121 msc->sc_iosize = mem->ar_length; 122 123 msc->sc_setup_interrupts = virtio_acpi_setup_interrupts; 124 msc->sc_free_interrupts = virtio_acpi_free_interrupts; 125 126 virtio_mmio_common_attach(msc); 127 virtio_acpi_rescan(self, "virtio", NULL); 128 129 done: 130 acpi_resource_cleanup(&res); 131 } 132 133 static int 134 virtio_acpi_detach(device_t self, int flags) 135 { 136 struct virtio_acpi_softc * const sc = device_private(self); 137 struct virtio_mmio_softc * const msc = &sc->sc_msc; 138 139 return virtio_mmio_common_detach(msc, flags); 140 } 141 142 static int 143 virtio_acpi_rescan(device_t self, const char *ifattr, const int *locs) 144 { 145 struct virtio_acpi_softc * const sc = device_private(self); 146 struct virtio_mmio_softc * const msc = &sc->sc_msc; 147 struct virtio_softc * const vsc = &msc->sc_sc; 148 struct virtio_attach_args va; 149 150 if (vsc->sc_child) 151 return 0; 152 153 memset(&va, 0, sizeof(va)); 154 va.sc_childdevid = vsc->sc_childdevid; 155 156 config_found_ia(self, ifattr, &va, virtiobusprint); 157 158 return 0; 159 } 160 161 static int 162 virtio_acpi_setup_interrupts(struct virtio_mmio_softc *msc) 163 { 164 struct virtio_acpi_softc * const sc = (struct virtio_acpi_softc *)msc; 165 struct virtio_softc * const vsc = &msc->sc_sc; 166 167 msc->sc_ih = intr_establish(sc->sc_irq, IPL_VM, sc->sc_irqtype, virtio_mmio_intr, msc); 168 if (msc->sc_ih == NULL) { 169 aprint_error_dev(vsc->sc_dev, "couldn't install interrupt handler\n"); 170 return -1; 171 } 172 173 aprint_normal_dev(vsc->sc_dev, "interrupting on irq %d\n", sc->sc_irq); 174 175 return 0; 176 } 177 178 static void 179 virtio_acpi_free_interrupts(struct virtio_mmio_softc *msc) 180 { 181 if (msc->sc_ih != NULL) { 182 intr_disestablish(msc->sc_ih); 183 msc->sc_ih = NULL; 184 } 185 } 186
Indexes created Fri Sep 26 08:10:20 GMT 2025