1 /*- 2 * Copyright (c) 2005 John Baldwin <jhb@FreeBSD.org> 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the author nor the names of any co-contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30 #include <sys/cdefs.h> 31 __FBSDID("$FreeBSD$"); 32 33 /* 34 * Simple driver for PCI VGA display devices. Drivers such as agp(4) and 35 * drm(4) should attach as children of this device. 36 * 37 * XXX: The vgapci name is a hack until we somehow merge the isa vga driver 38 * in or rename it. 39 */ 40 41 #include <sys/param.h> 42 #include <sys/bus.h> 43 #include <sys/kernel.h> 44 #include <sys/module.h> 45 46 #include <dev/pci/pcireg.h> 47 #include <dev/pci/pcivar.h> 48 49 struct vga_pci_softc { 50 device_t vga_msi_child; /* Child driver using MSI. */ 51 }; 52 53 static int 54 vga_pci_probe(device_t dev) 55 { 56 57 switch (pci_get_class(dev)) { 58 case PCIC_DISPLAY: 59 break; 60 case PCIC_OLD: 61 if (pci_get_subclass(dev) != PCIS_OLD_VGA) 62 return (ENXIO); 63 break; 64 default: 65 return (ENXIO); 66 } 67 device_set_desc(dev, "VGA-compatible display"); 68 return (BUS_PROBE_GENERIC); 69 } 70 71 static int 72 vga_pci_attach(device_t dev) 73 { 74 75 bus_generic_probe(dev); 76 77 /* Always create a drm child for now to make it easier on drm. */ 78 device_add_child(dev, "drm", -1); 79 bus_generic_attach(dev); 80 return (0); 81 } 82 83 static int 84 vga_pci_suspend(device_t dev) 85 { 86 87 return (bus_generic_suspend(dev)); 88 } 89 90 static int 91 vga_pci_resume(device_t dev) 92 { 93 94 return (bus_generic_resume(dev)); 95 } 96 97 /* Bus interface. */ 98 99 static int 100 vga_pci_read_ivar(device_t dev, device_t child, int which, uintptr_t *result) 101 { 102 103 return (BUS_READ_IVAR(device_get_parent(dev), dev, which, result)); 104 } 105 106 static int 107 vga_pci_write_ivar(device_t dev, device_t child, int which, uintptr_t value) 108 { 109 110 return (EINVAL); 111 } 112 113 static int 114 vga_pci_setup_intr(device_t dev, device_t child, struct resource *irq, 115 int flags, driver_filter_t *filter, driver_intr_t *intr, void *arg, 116 void **cookiep) 117 { 118 return (BUS_SETUP_INTR(device_get_parent(dev), dev, irq, flags, 119 filter, intr, arg, cookiep)); 120 } 121 122 static int 123 vga_pci_teardown_intr(device_t dev, device_t child, struct resource *irq, 124 void *cookie) 125 { 126 return (BUS_TEARDOWN_INTR(device_get_parent(dev), dev, irq, cookie)); 127 } 128 129 static struct resource * 130 vga_pci_alloc_resource(device_t dev, device_t child, int type, int *rid, 131 u_long start, u_long end, u_long count, u_int flags) 132 { 133 134 return (bus_alloc_resource(dev, type, rid, start, end, count, flags)); 135 } 136 137 static int 138 vga_pci_release_resource(device_t dev, device_t child, int type, int rid, 139 struct resource *r) 140 { 141 142 return (bus_release_resource(dev, type, rid, r)); 143 } 144 145 /* PCI interface. */ 146 147 static uint32_t 148 vga_pci_read_config(device_t dev, device_t child, int reg, int width) 149 { 150 151 return (pci_read_config(dev, reg, width)); 152 } 153 154 static void 155 vga_pci_write_config(device_t dev, device_t child, int reg, 156 uint32_t val, int width) 157 { 158 159 pci_write_config(dev, reg, val, width); 160 } 161 162 static int 163 vga_pci_enable_busmaster(device_t dev, device_t child) 164 { 165 166 device_printf(dev, "child %s requested pci_enable_busmaster\n", 167 device_get_nameunit(child)); 168 return (pci_enable_busmaster(dev)); 169 } 170 171 static int 172 vga_pci_disable_busmaster(device_t dev, device_t child) 173 { 174 175 device_printf(dev, "child %s requested pci_disable_busmaster\n", 176 device_get_nameunit(child)); 177 return (pci_disable_busmaster(dev)); 178 } 179 180 static int 181 vga_pci_enable_io(device_t dev, device_t child, int space) 182 { 183 184 device_printf(dev, "child %s requested pci_enable_io\n", 185 device_get_nameunit(child)); 186 return (pci_enable_io(dev, space)); 187 } 188 189 static int 190 vga_pci_disable_io(device_t dev, device_t child, int space) 191 { 192 193 device_printf(dev, "child %s requested pci_disable_io\n", 194 device_get_nameunit(child)); 195 return (pci_disable_io(dev, space)); 196 } 197 198 static int 199 vga_pci_get_vpd_ident(device_t dev, device_t child, const char **identptr) 200 { 201 202 return (pci_get_vpd_ident(dev, identptr)); 203 } 204 205 static int 206 vga_pci_get_vpd_readonly(device_t dev, device_t child, const char *kw, 207 const char **vptr) 208 { 209 210 return (pci_get_vpd_readonly(dev, kw, vptr)); 211 } 212 213 static int 214 vga_pci_set_powerstate(device_t dev, device_t child, int state) 215 { 216 217 device_printf(dev, "child %s requested pci_set_powerstate\n", 218 device_get_nameunit(child)); 219 return (pci_set_powerstate(dev, state)); 220 } 221 222 static int 223 vga_pci_get_powerstate(device_t dev, device_t child) 224 { 225 226 device_printf(dev, "child %s requested pci_get_powerstate\n", 227 device_get_nameunit(child)); 228 return (pci_get_powerstate(dev)); 229 } 230 231 static int 232 vga_pci_assign_interrupt(device_t dev, device_t child) 233 { 234 235 device_printf(dev, "child %s requested pci_assign_interrupt\n", 236 device_get_nameunit(child)); 237 return (PCI_ASSIGN_INTERRUPT(device_get_parent(dev), dev)); 238 } 239 240 static int 241 vga_pci_find_extcap(device_t dev, device_t child, int capability, 242 int *capreg) 243 { 244 245 return (pci_find_extcap(dev, capability, capreg)); 246 } 247 248 static int 249 vga_pci_alloc_msi(device_t dev, device_t child, int *count) 250 { 251 struct vga_pci_softc *sc; 252 int error; 253 254 sc = device_get_softc(dev); 255 if (sc->vga_msi_child != NULL) 256 return (EBUSY); 257 error = pci_alloc_msi(dev, count); 258 if (error == 0) 259 sc->vga_msi_child = child; 260 return (error); 261 } 262 263 static int 264 vga_pci_alloc_msix(device_t dev, device_t child, int *count) 265 { 266 struct vga_pci_softc *sc; 267 int error; 268 269 sc = device_get_softc(dev); 270 if (sc->vga_msi_child != NULL) 271 return (EBUSY); 272 error = pci_alloc_msix(dev, count); 273 if (error == 0) 274 sc->vga_msi_child = child; 275 return (error); 276 } 277 278 static int 279 vga_pci_remap_msix(device_t dev, device_t child, int count, 280 const u_int *vectors) 281 { 282 struct vga_pci_softc *sc; 283 284 sc = device_get_softc(dev); 285 if (sc->vga_msi_child != child) 286 return (ENXIO); 287 return (pci_remap_msix(dev, count, vectors)); 288 } 289 290 static int 291 vga_pci_release_msi(device_t dev, device_t child) 292 { 293 struct vga_pci_softc *sc; 294 int error; 295 296 sc = device_get_softc(dev); 297 if (sc->vga_msi_child != child) 298 return (ENXIO); 299 error = pci_release_msi(dev); 300 if (error == 0) 301 sc->vga_msi_child = NULL; 302 return (error); 303 } 304 305 static int 306 vga_pci_msi_count(device_t dev, device_t child) 307 { 308 309 return (pci_msi_count(dev)); 310 } 311 312 static int 313 vga_pci_msix_count(device_t dev, device_t child) 314 { 315 316 return (pci_msix_count(dev)); 317 } 318 319 static device_method_t vga_pci_methods[] = { 320 /* Device interface */ 321 DEVMETHOD(device_probe, vga_pci_probe), 322 DEVMETHOD(device_attach, vga_pci_attach), 323 DEVMETHOD(device_shutdown, bus_generic_shutdown), 324 DEVMETHOD(device_suspend, vga_pci_suspend), 325 DEVMETHOD(device_resume, vga_pci_resume), 326 327 /* Bus interface */ 328 DEVMETHOD(bus_read_ivar, vga_pci_read_ivar), 329 DEVMETHOD(bus_write_ivar, vga_pci_write_ivar), 330 DEVMETHOD(bus_setup_intr, vga_pci_setup_intr), 331 DEVMETHOD(bus_teardown_intr, vga_pci_teardown_intr), 332 333 DEVMETHOD(bus_alloc_resource, vga_pci_alloc_resource), 334 DEVMETHOD(bus_release_resource, vga_pci_release_resource), 335 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource), 336 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource), 337 338 /* PCI interface */ 339 DEVMETHOD(pci_read_config, vga_pci_read_config), 340 DEVMETHOD(pci_write_config, vga_pci_write_config), 341 DEVMETHOD(pci_enable_busmaster, vga_pci_enable_busmaster), 342 DEVMETHOD(pci_disable_busmaster, vga_pci_disable_busmaster), 343 DEVMETHOD(pci_enable_io, vga_pci_enable_io), 344 DEVMETHOD(pci_disable_io, vga_pci_disable_io), 345 DEVMETHOD(pci_get_vpd_ident, vga_pci_get_vpd_ident), 346 DEVMETHOD(pci_get_vpd_readonly, vga_pci_get_vpd_readonly), 347 DEVMETHOD(pci_get_powerstate, vga_pci_get_powerstate), 348 DEVMETHOD(pci_set_powerstate, vga_pci_set_powerstate), 349 DEVMETHOD(pci_assign_interrupt, vga_pci_assign_interrupt), 350 DEVMETHOD(pci_find_extcap, vga_pci_find_extcap), 351 DEVMETHOD(pci_alloc_msi, vga_pci_alloc_msi), 352 DEVMETHOD(pci_alloc_msix, vga_pci_alloc_msix), 353 DEVMETHOD(pci_remap_msix, vga_pci_remap_msix), 354 DEVMETHOD(pci_release_msi, vga_pci_release_msi), 355 DEVMETHOD(pci_msi_count, vga_pci_msi_count), 356 DEVMETHOD(pci_msix_count, vga_pci_msix_count), 357 358 { 0, 0 } 359 }; 360 361 static driver_t vga_pci_driver = { 362 "vgapci", 363 vga_pci_methods, 364 sizeof(struct vga_pci_softc), 365 }; 366 367 static devclass_t vga_devclass; 368 369 DRIVER_MODULE(vgapci, pci, vga_pci_driver, vga_devclass, 0, 0); 370