1 /* $NetBSD: virtio_mainbus.c,v 1.4 2021/11/03 07:53:56 skrll Exp $ */ 2 3 /* 4 * Copyright (c) 2021 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Reinoud Zandijk 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 COPYRIGHT HOLDERS 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 COPYRIGHT HOLDER OR 23 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 24 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 25 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 26 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 27 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 28 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 29 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 __KERNEL_RCSID(0, "$NetBSD: virtio_mainbus.c,v 1.4 2021/11/03 07:53:56 skrll Exp $"); 34 35 #include <sys/param.h> 36 #include <sys/systm.h> 37 38 #include <sys/device.h> 39 #include <evbmips/mipssim/autoconf.h> 40 #include <evbmips/mipssim/mipssimreg.h> 41 42 #define VIRTIO_PRIVATE 43 #include <dev/virtio/virtio_mmiovar.h> 44 45 46 static int virtio_mainbus_match(device_t, cfdata_t, void *); 47 static void virtio_mainbus_attach(device_t, device_t, void *); 48 static int virtio_mainbus_rescan(device_t, const char *, const int *); 49 static int virtio_mainbus_detach(device_t, int); 50 51 static int virtio_mainbus_alloc_interrupts(struct virtio_mmio_softc *); 52 static void virtio_mainbus_free_interrupts(struct virtio_mmio_softc *); 53 54 struct virtio_mainbus_softc { 55 struct virtio_mmio_softc sc_msc; 56 57 int sc_irq; 58 void *sc_ih; 59 }; 60 61 62 CFATTACH_DECL3_NEW(virtio_mainbus, sizeof(struct virtio_mainbus_softc), 63 virtio_mainbus_match, virtio_mainbus_attach, 64 virtio_mainbus_detach, NULL, 65 virtio_mainbus_rescan, (void *)voidop, DVF_DETACH_SHUTDOWN); 66 67 68 static int 69 virtio_mainbus_match(device_t parent, cfdata_t match, void *aux) 70 { 71 struct mainbus_attach_args *ma = aux; 72 73 /* TODO can we check here if its present? */ 74 if (strcmp(ma->ma_name, match->cf_name) == 0) 75 return (1<<1); 76 77 return (0); 78 } 79 80 81 void 82 virtio_mainbus_attach(device_t parent, device_t self, void *aux) 83 { 84 struct virtio_mainbus_softc *sc = device_private(self); 85 struct virtio_mmio_softc *msc = &sc->sc_msc; 86 struct virtio_softc *vsc = &msc->sc_sc; 87 struct mainbus_attach_args *ma = aux; 88 bus_space_handle_t ioh; 89 90 if (bus_space_map(ma->ma_iot, ma->ma_addr, VIRTIO_STRIDE, 0, &ioh) != 0) { 91 aprint_error(": can't map i/o space\n"); 92 return; 93 } 94 95 aprint_normal("\n"); 96 aprint_naive("\n"); 97 98 sc->sc_irq = ma->ma_irq; 99 100 msc->sc_iot = ma->ma_iot; 101 msc->sc_ioh = ioh; 102 msc->sc_iosize = VIRTIO_STRIDE; 103 msc->sc_alloc_interrupts = virtio_mainbus_alloc_interrupts; 104 msc->sc_free_interrupts = virtio_mainbus_free_interrupts; 105 106 vsc->sc_dev = self; 107 vsc->sc_dmat = ma->ma_dmat; 108 if (virtio_mmio_common_probe_present(msc)) 109 virtio_mmio_common_attach(msc); 110 111 virtio_mainbus_rescan(self, NULL, NULL); 112 } 113 114 115 /* ARGSUSED */ 116 static int 117 virtio_mainbus_rescan(device_t self, const char *ifattr, const int *locs) 118 { 119 struct virtio_mainbus_softc *sc = device_private(self); 120 struct virtio_mmio_softc *msc = &sc->sc_msc; 121 struct virtio_softc *vsc = &msc->sc_sc; 122 struct virtio_attach_args va; 123 124 if (vsc->sc_child) /* child already attached? */ 125 return 0; 126 127 memset(&va, 0, sizeof(va)); 128 va.sc_childdevid = vsc->sc_childdevid; 129 130 config_found(self, &va, NULL, CFARGS_NONE); 131 132 if (virtio_attach_failed(vsc)) 133 return 0; 134 return 0; 135 } 136 137 138 static int 139 virtio_mainbus_detach(device_t self, int flags) 140 { 141 struct virtio_mainbus_softc *sc = device_private(self); 142 struct virtio_mmio_softc * const msc = &sc->sc_msc; 143 144 return virtio_mmio_common_detach(msc, flags); 145 } 146 147 148 static int 149 virtio_mainbus_alloc_interrupts(struct virtio_mmio_softc *msc) 150 { 151 struct virtio_mainbus_softc *sc = (struct virtio_mainbus_softc *) msc; 152 struct virtio_softc * const vsc = &msc->sc_sc; 153 154 msc->sc_ih = evbmips_intr_establish(sc->sc_irq, virtio_mmio_intr, 155 msc); 156 if (msc->sc_ih == NULL) { 157 aprint_error_dev(vsc->sc_dev, 158 "couldn't install interrupt handler\n"); 159 return -1; 160 } 161 162 aprint_normal_dev(vsc->sc_dev, "interrupting at irq %d\n", sc->sc_irq); 163 164 return 0; 165 } 166 167 168 static void 169 virtio_mainbus_free_interrupts(struct virtio_mmio_softc *msc) 170 { 171 panic("%s not implemented\n", __func__); 172 } 173
Indexes created Sun Sep 28 16:09:52 GMT 2025