virtio_mmio_fdt.c revision 1.2.2.3
1 1.2.2.3 pgoyette /* $NetBSD: virtio_mmio_fdt.c,v 1.2.2.3 2018/09/30 01:45:49 pgoyette Exp $ */ 2 1.2.2.2 pgoyette 3 1.2.2.2 pgoyette /* 4 1.2.2.2 pgoyette * Copyright (c) 2018 Jonathan A. Kollasch 5 1.2.2.2 pgoyette * All rights reserved. 6 1.2.2.2 pgoyette * 7 1.2.2.2 pgoyette * Redistribution and use in source and binary forms, with or without 8 1.2.2.2 pgoyette * modification, are permitted provided that the following conditions 9 1.2.2.2 pgoyette * are met: 10 1.2.2.2 pgoyette * 1. Redistributions of source code must retain the above copyright 11 1.2.2.2 pgoyette * notice, this list of conditions and the following disclaimer. 12 1.2.2.2 pgoyette * 2. Redistributions in binary form must reproduce the above copyright 13 1.2.2.2 pgoyette * notice, this list of conditions and the following disclaimer in the 14 1.2.2.2 pgoyette * documentation and/or other materials provided with the distribution. 15 1.2.2.2 pgoyette * 16 1.2.2.2 pgoyette * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 17 1.2.2.2 pgoyette * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 18 1.2.2.2 pgoyette * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 19 1.2.2.2 pgoyette * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR 20 1.2.2.2 pgoyette * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 21 1.2.2.2 pgoyette * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 22 1.2.2.2 pgoyette * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 23 1.2.2.2 pgoyette * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 24 1.2.2.2 pgoyette * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 25 1.2.2.2 pgoyette * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 26 1.2.2.2 pgoyette * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 1.2.2.2 pgoyette */ 28 1.2.2.2 pgoyette 29 1.2.2.2 pgoyette #include <sys/cdefs.h> 30 1.2.2.3 pgoyette __KERNEL_RCSID(0, "$NetBSD: virtio_mmio_fdt.c,v 1.2.2.3 2018/09/30 01:45:49 pgoyette Exp $"); 31 1.2.2.2 pgoyette 32 1.2.2.2 pgoyette #include <sys/param.h> 33 1.2.2.2 pgoyette #include <sys/systm.h> 34 1.2.2.2 pgoyette 35 1.2.2.2 pgoyette #include <sys/device.h> 36 1.2.2.2 pgoyette 37 1.2.2.2 pgoyette #include <dev/fdt/fdtvar.h> 38 1.2.2.2 pgoyette 39 1.2.2.2 pgoyette #define VIRTIO_PRIVATE 40 1.2.2.2 pgoyette #include <dev/virtio/virtio_mmiovar.h> 41 1.2.2.2 pgoyette 42 1.2.2.2 pgoyette static int virtio_mmio_fdt_match(device_t, cfdata_t, void *); 43 1.2.2.2 pgoyette static void virtio_mmio_fdt_attach(device_t, device_t, void *); 44 1.2.2.2 pgoyette static int virtio_mmio_fdt_rescan(device_t, const char *, const int *); 45 1.2.2.2 pgoyette static int virtio_mmio_fdt_detach(device_t, int); 46 1.2.2.2 pgoyette 47 1.2.2.2 pgoyette static int virtio_mmio_fdt_setup_interrupts(struct virtio_mmio_softc *); 48 1.2.2.2 pgoyette static void virtio_mmio_fdt_free_interrupts(struct virtio_mmio_softc *); 49 1.2.2.2 pgoyette 50 1.2.2.2 pgoyette struct virtio_mmio_fdt_softc { 51 1.2.2.2 pgoyette struct virtio_mmio_softc sc_msc; 52 1.2.2.2 pgoyette int sc_phandle; 53 1.2.2.2 pgoyette }; 54 1.2.2.2 pgoyette 55 1.2.2.2 pgoyette CFATTACH_DECL3_NEW(virtio_mmio_fdt, sizeof(struct virtio_mmio_fdt_softc), 56 1.2.2.2 pgoyette virtio_mmio_fdt_match, virtio_mmio_fdt_attach, virtio_mmio_fdt_detach, NULL, 57 1.2.2.2 pgoyette virtio_mmio_fdt_rescan, (void *)voidop, DVF_DETACH_SHUTDOWN); 58 1.2.2.2 pgoyette 59 1.2.2.2 pgoyette static const char * const compatible[] = { 60 1.2.2.2 pgoyette "virtio,mmio", 61 1.2.2.2 pgoyette NULL 62 1.2.2.2 pgoyette }; 63 1.2.2.2 pgoyette 64 1.2.2.2 pgoyette static int 65 1.2.2.2 pgoyette virtio_mmio_fdt_match(device_t parent, cfdata_t match, void *aux) 66 1.2.2.2 pgoyette { 67 1.2.2.2 pgoyette struct fdt_attach_args * const faa = aux; 68 1.2.2.2 pgoyette 69 1.2.2.2 pgoyette return of_match_compatible(faa->faa_phandle, compatible); 70 1.2.2.2 pgoyette } 71 1.2.2.2 pgoyette 72 1.2.2.2 pgoyette static void 73 1.2.2.2 pgoyette virtio_mmio_fdt_attach(device_t parent, device_t self, void *aux) 74 1.2.2.2 pgoyette { 75 1.2.2.2 pgoyette struct virtio_mmio_fdt_softc * const fsc = device_private(self); 76 1.2.2.2 pgoyette struct virtio_mmio_softc * const msc = &fsc->sc_msc; 77 1.2.2.2 pgoyette struct virtio_softc * const vsc = &msc->sc_sc; 78 1.2.2.2 pgoyette struct fdt_attach_args * const faa = aux; 79 1.2.2.2 pgoyette bus_addr_t addr; 80 1.2.2.2 pgoyette bus_size_t size; 81 1.2.2.2 pgoyette int error; 82 1.2.2.2 pgoyette 83 1.2.2.2 pgoyette aprint_normal("\n"); 84 1.2.2.2 pgoyette aprint_naive("\n"); 85 1.2.2.2 pgoyette 86 1.2.2.2 pgoyette if (fdtbus_get_reg(faa->faa_phandle, 0, &addr, &size) != 0) { 87 1.2.2.2 pgoyette aprint_error_dev(self, "couldn't get registers\n"); 88 1.2.2.2 pgoyette return; 89 1.2.2.2 pgoyette } 90 1.2.2.2 pgoyette 91 1.2.2.2 pgoyette fsc->sc_phandle = faa->faa_phandle; 92 1.2.2.2 pgoyette msc->sc_iot = faa->faa_bst; 93 1.2.2.2 pgoyette vsc->sc_dev = self; 94 1.2.2.2 pgoyette vsc->sc_dmat = faa->faa_dmat; 95 1.2.2.2 pgoyette 96 1.2.2.2 pgoyette error = bus_space_map(msc->sc_iot, addr, size, 0, &msc->sc_ioh); 97 1.2.2.2 pgoyette if (error) { 98 1.2.2.3 pgoyette aprint_error_dev(self, "couldn't map %#" PRIx64 ": %d", 99 1.2.2.2 pgoyette (uint64_t)addr, error); 100 1.2.2.2 pgoyette return; 101 1.2.2.2 pgoyette } 102 1.2.2.2 pgoyette msc->sc_iosize = size; 103 1.2.2.2 pgoyette 104 1.2.2.2 pgoyette msc->sc_setup_interrupts = virtio_mmio_fdt_setup_interrupts; 105 1.2.2.2 pgoyette msc->sc_free_interrupts = virtio_mmio_fdt_free_interrupts; 106 1.2.2.2 pgoyette 107 1.2.2.2 pgoyette virtio_mmio_common_attach(msc); 108 1.2.2.2 pgoyette virtio_mmio_fdt_rescan(self, "virtio", NULL); 109 1.2.2.2 pgoyette } 110 1.2.2.2 pgoyette 111 1.2.2.2 pgoyette /* ARGSUSED */ 112 1.2.2.2 pgoyette static int 113 1.2.2.2 pgoyette virtio_mmio_fdt_rescan(device_t self, const char *attr, const int *scan_flags) 114 1.2.2.2 pgoyette { 115 1.2.2.2 pgoyette struct virtio_mmio_fdt_softc * const fsc = device_private(self); 116 1.2.2.2 pgoyette struct virtio_mmio_softc * const msc = &fsc->sc_msc; 117 1.2.2.2 pgoyette struct virtio_softc * const vsc = &msc->sc_sc; 118 1.2.2.2 pgoyette struct virtio_attach_args va; 119 1.2.2.2 pgoyette 120 1.2.2.2 pgoyette if (vsc->sc_child) /* Child already attached? */ 121 1.2.2.2 pgoyette return 0; 122 1.2.2.2 pgoyette memset(&va, 0, sizeof(va)); 123 1.2.2.2 pgoyette va.sc_childdevid = vsc->sc_childdevid; 124 1.2.2.2 pgoyette 125 1.2.2.2 pgoyette config_found_ia(self, attr, &va, virtiobusprint); 126 1.2.2.2 pgoyette 127 1.2.2.2 pgoyette if (vsc->sc_child == NULL) { 128 1.2.2.2 pgoyette return 0; 129 1.2.2.2 pgoyette } 130 1.2.2.2 pgoyette 131 1.2.2.2 pgoyette if (vsc->sc_child == VIRTIO_CHILD_FAILED) { 132 1.2.2.2 pgoyette aprint_error_dev(self, "virtio configuration failed\n"); 133 1.2.2.2 pgoyette return 0; 134 1.2.2.2 pgoyette } 135 1.2.2.2 pgoyette 136 1.2.2.2 pgoyette /* 137 1.2.2.2 pgoyette * Make sure child drivers initialize interrupts via call 138 1.2.2.2 pgoyette * to virtio_child_attach_finish(). 139 1.2.2.2 pgoyette */ 140 1.2.2.2 pgoyette KASSERT(msc->sc_ih != NULL); 141 1.2.2.2 pgoyette 142 1.2.2.2 pgoyette return 0; 143 1.2.2.2 pgoyette } 144 1.2.2.2 pgoyette 145 1.2.2.2 pgoyette static int 146 1.2.2.2 pgoyette virtio_mmio_fdt_detach(device_t self, int flags) 147 1.2.2.2 pgoyette { 148 1.2.2.2 pgoyette struct virtio_mmio_fdt_softc * const fsc = device_private(self); 149 1.2.2.2 pgoyette struct virtio_mmio_softc * const msc = &fsc->sc_msc; 150 1.2.2.2 pgoyette 151 1.2.2.2 pgoyette return virtio_mmio_common_detach(msc, flags); 152 1.2.2.2 pgoyette } 153 1.2.2.2 pgoyette 154 1.2.2.2 pgoyette static int 155 1.2.2.2 pgoyette virtio_mmio_fdt_setup_interrupts(struct virtio_mmio_softc *msc) 156 1.2.2.2 pgoyette { 157 1.2.2.2 pgoyette struct virtio_mmio_fdt_softc * const fsc = (void *)msc; 158 1.2.2.2 pgoyette struct virtio_softc * const vsc = &msc->sc_sc; 159 1.2.2.2 pgoyette char intrstr[128]; 160 1.2.2.2 pgoyette int flags = 0; 161 1.2.2.2 pgoyette 162 1.2.2.2 pgoyette if (!fdtbus_intr_str(fsc->sc_phandle, 0, intrstr, sizeof(intrstr))) { 163 1.2.2.2 pgoyette aprint_error_dev(vsc->sc_dev, "failed to decode interrupt\n"); 164 1.2.2.2 pgoyette return -1; 165 1.2.2.2 pgoyette } 166 1.2.2.2 pgoyette 167 1.2.2.2 pgoyette if (vsc->sc_flags & VIRTIO_F_PCI_INTR_MPSAFE) 168 1.2.2.2 pgoyette flags |= FDT_INTR_MPSAFE; 169 1.2.2.2 pgoyette 170 1.2.2.2 pgoyette msc->sc_ih = fdtbus_intr_establish(fsc->sc_phandle, 0, vsc->sc_ipl, 171 1.2.2.2 pgoyette flags, virtio_mmio_intr, msc); 172 1.2.2.2 pgoyette if (msc->sc_ih == NULL) { 173 1.2.2.2 pgoyette aprint_error_dev(vsc->sc_dev, 174 1.2.2.2 pgoyette "failed to establish interrupt on %s\n", intrstr); 175 1.2.2.2 pgoyette return -1; 176 1.2.2.2 pgoyette } 177 1.2.2.2 pgoyette aprint_normal_dev(vsc->sc_dev, "interrupting on %s\n", intrstr); 178 1.2.2.2 pgoyette 179 1.2.2.2 pgoyette return 0; 180 1.2.2.2 pgoyette } 181 1.2.2.2 pgoyette 182 1.2.2.2 pgoyette static void 183 1.2.2.2 pgoyette virtio_mmio_fdt_free_interrupts(struct virtio_mmio_softc *msc) 184 1.2.2.2 pgoyette { 185 1.2.2.2 pgoyette struct virtio_mmio_fdt_softc * const fsc = (void *)msc; 186 1.2.2.2 pgoyette 187 1.2.2.2 pgoyette if (msc->sc_ih != NULL) { 188 1.2.2.2 pgoyette fdtbus_intr_disestablish(fsc->sc_phandle, msc->sc_ih); 189 1.2.2.2 pgoyette msc->sc_ih = NULL; 190 1.2.2.2 pgoyette } 191 1.2.2.2 pgoyette } 192
Indexes created Thu Oct 02 14:10:14 GMT 2025