genfb_vmbus.c revision 1.1.4.3
1 /* $NetBSD: genfb_vmbus.c,v 1.1.4.3 2019/06/12 11:35:40 martin Exp $ */ 2 3 /*- 4 * Copyright (c) 2007 Michael Lorenz 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 17 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 18 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 19 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 20 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 26 * POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29 #include <sys/cdefs.h> 30 __KERNEL_RCSID(0, "$NetBSD: genfb_vmbus.c,v 1.1.4.3 2019/06/12 11:35:40 martin Exp $"); 31 32 #include "opt_wsfb.h" 33 #include "opt_genfb.h" 34 35 #include <sys/param.h> 36 #include <sys/systm.h> 37 #include <sys/kernel.h> 38 #include <sys/device.h> 39 #include <sys/proc.h> 40 #include <sys/mutex.h> 41 #include <sys/ioctl.h> 42 #include <sys/systm.h> 43 #include <sys/kauth.h> 44 45 #include <dev/wsfb/genfbvar.h> 46 47 #include <dev/hyperv/vmbusvar.h> 48 #include <dev/hyperv/genfb_vmbusvar.h> 49 50 static int genfb_vmbus_match(device_t, cfdata_t, void *); 51 static void genfb_vmbus_attach(device_t, device_t, void *); 52 static int genfb_vmbus_ioctl(void *, void *, u_long, void *, int, 53 struct lwp *); 54 static paddr_t genfb_vmbus_mmap(void *, void *, off_t, int); 55 static int genfb_vmbus_drm_print(void *, const char *); 56 static bool genfb_vmbus_shutdown(device_t, int); 57 58 CFATTACH_DECL_NEW(genfb_vmbus, sizeof(struct genfb_vmbus_softc), 59 genfb_vmbus_match, genfb_vmbus_attach, NULL, NULL); 60 61 static int 62 genfb_vmbus_match(device_t parent, cfdata_t match, void *aux) 63 { 64 struct vmbus_attach_args *aa = aux; 65 66 if (memcmp(aa->aa_type, &hyperv_guid_video, sizeof(*aa->aa_type)) != 0) 67 return 0; 68 69 if (!genfb_is_enabled()) 70 return 0; /* explicitly disabled by MD code */ 71 72 /* Use genfb(4) at pci in Gen.1 VM. */ 73 if (hyperv_is_gen1()) 74 return 0; 75 76 return 1; 77 } 78 79 static void 80 genfb_vmbus_attach(device_t parent, device_t self, void *aux) 81 { 82 static const struct genfb_ops zero_ops; 83 struct genfb_vmbus_softc *sc = device_private(self); 84 struct vmbus_attach_args *aa = aux; 85 struct genfb_ops ops = zero_ops; 86 87 aprint_naive("\n"); 88 aprint_normal(": Hyper-V Synthetic Video\n"); 89 90 sc->sc_gen.sc_dev = self; 91 sc->sc_memt = aa->aa_memt; 92 93 genfb_init(&sc->sc_gen); 94 95 /* firmware / MD code responsible for restoring the display */ 96 if (sc->sc_gen.sc_pmfcb == NULL) 97 pmf_device_register1(self, NULL, NULL, 98 genfb_vmbus_shutdown); 99 else 100 pmf_device_register1(self, 101 sc->sc_gen.sc_pmfcb->gpc_suspend, 102 sc->sc_gen.sc_pmfcb->gpc_resume, 103 genfb_vmbus_shutdown); 104 105 if ((sc->sc_gen.sc_width == 0) || (sc->sc_gen.sc_fbsize == 0)) { 106 aprint_debug_dev(self, "not configured by firmware\n"); 107 return; 108 } 109 110 ops.genfb_ioctl = genfb_vmbus_ioctl; 111 ops.genfb_mmap = genfb_vmbus_mmap; 112 113 if (genfb_attach(&sc->sc_gen, &ops) != 0) 114 return; 115 116 /* now try to attach a DRM */ 117 config_found_ia(self, "drm", aux, genfb_vmbus_drm_print); 118 } 119 120 static int 121 genfb_vmbus_drm_print(void *aux, const char *pnp) 122 { 123 124 if (pnp) 125 aprint_normal("drm at %s", pnp); 126 return UNCONF; 127 } 128 129 static int 130 genfb_vmbus_ioctl(void *v, void *vs, u_long cmd, void *data, int flag, 131 struct lwp *l) 132 { 133 134 switch (cmd) { 135 case WSDISPLAYIO_GTYPE: 136 *(u_int *)data = WSDISPLAY_TYPE_GENFB; 137 return 0; 138 } 139 140 return EPASSTHROUGH; 141 } 142 143 static paddr_t 144 genfb_vmbus_mmap(void *v, void *vs, off_t offset, int prot) 145 { 146 struct genfb_vmbus_softc *sc = v; 147 148 return bus_space_mmap(sc->sc_memt, sc->sc_gen.sc_fboffset, offset, prot, 149 BUS_SPACE_MAP_LINEAR | BUS_SPACE_MAP_PREFETCHABLE); 150 } 151 152 static bool 153 genfb_vmbus_shutdown(device_t self, int flags) 154 { 155 156 genfb_enable_polling(self); 157 return true; 158 } 159 /* $NetBSD: genfb_vmbus.c,v 1.1.4.3 2019/06/12 11:35:40 martin Exp $ */ 160 161 /*- 162 * Copyright (c) 2007 Michael Lorenz 163 * All rights reserved. 164 * 165 * Redistribution and use in source and binary forms, with or without 166 * modification, are permitted provided that the following conditions 167 * are met: 168 * 1. Redistributions of source code must retain the above copyright 169 * notice, this list of conditions and the following disclaimer. 170 * 2. Redistributions in binary form must reproduce the above copyright 171 * notice, this list of conditions and the following disclaimer in the 172 * documentation and/or other materials provided with the distribution. 173 * 174 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 175 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 176 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 177 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 178 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 179 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 180 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 181 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 182 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 183 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 184 * POSSIBILITY OF SUCH DAMAGE. 185 */ 186 187 #include <sys/cdefs.h> 188 __KERNEL_RCSID(0, "$NetBSD: genfb_vmbus.c,v 1.1.4.3 2019/06/12 11:35:40 martin Exp $"); 189 190 #include "opt_wsfb.h" 191 #include "opt_genfb.h" 192 193 #include <sys/param.h> 194 #include <sys/systm.h> 195 #include <sys/kernel.h> 196 #include <sys/device.h> 197 #include <sys/proc.h> 198 #include <sys/mutex.h> 199 #include <sys/ioctl.h> 200 #include <sys/systm.h> 201 #include <sys/kauth.h> 202 203 #include <dev/wsfb/genfbvar.h> 204 205 #include <dev/hyperv/vmbusvar.h> 206 #include <dev/hyperv/genfb_vmbusvar.h> 207 208 static int genfb_vmbus_match(device_t, cfdata_t, void *); 209 static void genfb_vmbus_attach(device_t, device_t, void *); 210 static int genfb_vmbus_ioctl(void *, void *, u_long, void *, int, 211 struct lwp *); 212 static paddr_t genfb_vmbus_mmap(void *, void *, off_t, int); 213 static int genfb_vmbus_drm_print(void *, const char *); 214 static bool genfb_vmbus_shutdown(device_t, int); 215 216 CFATTACH_DECL_NEW(genfb_vmbus, sizeof(struct genfb_vmbus_softc), 217 genfb_vmbus_match, genfb_vmbus_attach, NULL, NULL); 218 219 static int 220 genfb_vmbus_match(device_t parent, cfdata_t match, void *aux) 221 { 222 struct vmbus_attach_args *aa = aux; 223 224 if (memcmp(aa->aa_type, &hyperv_guid_video, sizeof(*aa->aa_type)) != 0) 225 return 0; 226 227 if (!genfb_is_enabled()) 228 return 0; /* explicitly disabled by MD code */ 229 230 /* Use genfb(4) at pci in Gen.1 VM. */ 231 if (hyperv_is_gen1()) 232 return 0; 233 234 return 1; 235 } 236 237 static void 238 genfb_vmbus_attach(device_t parent, device_t self, void *aux) 239 { 240 static const struct genfb_ops zero_ops; 241 struct genfb_vmbus_softc *sc = device_private(self); 242 struct vmbus_attach_args *aa = aux; 243 struct genfb_ops ops = zero_ops; 244 245 aprint_naive("\n"); 246 aprint_normal(": Hyper-V Synthetic Video\n"); 247 248 sc->sc_gen.sc_dev = self; 249 sc->sc_memt = aa->aa_memt; 250 251 genfb_init(&sc->sc_gen); 252 253 /* firmware / MD code responsible for restoring the display */ 254 if (sc->sc_gen.sc_pmfcb == NULL) 255 pmf_device_register1(self, NULL, NULL, 256 genfb_vmbus_shutdown); 257 else 258 pmf_device_register1(self, 259 sc->sc_gen.sc_pmfcb->gpc_suspend, 260 sc->sc_gen.sc_pmfcb->gpc_resume, 261 genfb_vmbus_shutdown); 262 263 if ((sc->sc_gen.sc_width == 0) || (sc->sc_gen.sc_fbsize == 0)) { 264 aprint_debug_dev(self, "not configured by firmware\n"); 265 return; 266 } 267 268 ops.genfb_ioctl = genfb_vmbus_ioctl; 269 ops.genfb_mmap = genfb_vmbus_mmap; 270 271 if (genfb_attach(&sc->sc_gen, &ops) != 0) 272 return; 273 274 /* now try to attach a DRM */ 275 config_found_ia(self, "drm", aux, genfb_vmbus_drm_print); 276 } 277 278 static int 279 genfb_vmbus_drm_print(void *aux, const char *pnp) 280 { 281 282 if (pnp) 283 aprint_normal("drm at %s", pnp); 284 return UNCONF; 285 } 286 287 static int 288 genfb_vmbus_ioctl(void *v, void *vs, u_long cmd, void *data, int flag, 289 struct lwp *l) 290 { 291 292 switch (cmd) { 293 case WSDISPLAYIO_GTYPE: 294 *(u_int *)data = WSDISPLAY_TYPE_GENFB; 295 return 0; 296 } 297 298 return EPASSTHROUGH; 299 } 300 301 static paddr_t 302 genfb_vmbus_mmap(void *v, void *vs, off_t offset, int prot) 303 { 304 struct genfb_vmbus_softc *sc = v; 305 306 return bus_space_mmap(sc->sc_memt, sc->sc_gen.sc_fboffset, offset, prot, 307 BUS_SPACE_MAP_LINEAR | BUS_SPACE_MAP_PREFETCHABLE); 308 } 309 310 static bool 311 genfb_vmbus_shutdown(device_t self, int flags) 312 { 313 314 genfb_enable_polling(self); 315 return true; 316 } 317
Indexes created Tue Oct 14 11:09:46 GMT 2025