vga_pci.c revision 183095
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: head/sys/dev/pci/vga_pci.c 183095 2008-09-16 19:52:02Z jhb $"); 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 49struct vga_pci_softc { 50 device_t vga_msi_child; /* Child driver using MSI. */ 51}; 52 53static int 54vga_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 71static int 72vga_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 83static int 84vga_pci_suspend(device_t dev) 85{ 86 87 return (bus_generic_suspend(dev)); 88} 89 90static int 91vga_pci_resume(device_t dev) 92{ 93 94 return (bus_generic_resume(dev)); 95} 96 97/* Bus interface. */ 98 99static int 100vga_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 106static int 107vga_pci_write_ivar(device_t dev, device_t child, int which, uintptr_t value) 108{ 109 110 return (EINVAL); 111} 112 113static struct resource * 114vga_pci_alloc_resource(device_t dev, device_t child, int type, int *rid, 115 u_long start, u_long end, u_long count, u_int flags) 116{ 117 118 return (bus_alloc_resource(dev, type, rid, start, end, count, flags)); 119} 120 121static int 122vga_pci_release_resource(device_t dev, device_t child, int type, int rid, 123 struct resource *r) 124{ 125 126 return (bus_release_resource(dev, type, rid, r)); 127} 128 129/* PCI interface. */ 130 131static uint32_t 132vga_pci_read_config(device_t dev, device_t child, int reg, int width) 133{ 134 135 return (pci_read_config(dev, reg, width)); 136} 137 138static void 139vga_pci_write_config(device_t dev, device_t child, int reg, 140 uint32_t val, int width) 141{ 142 143 pci_write_config(dev, reg, val, width); 144} 145 146static int 147vga_pci_enable_busmaster(device_t dev, device_t child) 148{ 149 150 device_printf(dev, "child %s requested pci_enable_busmaster\n", 151 device_get_nameunit(child)); 152 return (pci_enable_busmaster(dev)); 153} 154 155static int 156vga_pci_disable_busmaster(device_t dev, device_t child) 157{ 158 159 device_printf(dev, "child %s requested pci_disable_busmaster\n", 160 device_get_nameunit(child)); 161 return (pci_disable_busmaster(dev)); 162} 163 164static int 165vga_pci_enable_io(device_t dev, device_t child, int space) 166{ 167 168 device_printf(dev, "child %s requested pci_enable_io\n", 169 device_get_nameunit(child)); 170 return (pci_enable_io(dev, space)); 171} 172 173static int 174vga_pci_disable_io(device_t dev, device_t child, int space) 175{ 176 177 device_printf(dev, "child %s requested pci_disable_io\n", 178 device_get_nameunit(child)); 179 return (pci_disable_io(dev, space)); 180} 181 182static int 183vga_pci_get_vpd_ident(device_t dev, device_t child, const char **identptr) 184{ 185 186 return (pci_get_vpd_ident(dev, identptr)); 187} 188 189static int 190vga_pci_get_vpd_readonly(device_t dev, device_t child, const char *kw, 191 const char **vptr) 192{ 193 194 return (pci_get_vpd_readonly(dev, kw, vptr)); 195} 196 197static int 198vga_pci_set_powerstate(device_t dev, device_t child, int state) 199{ 200 201 device_printf(dev, "child %s requested pci_set_powerstate\n", 202 device_get_nameunit(child)); 203 return (pci_set_powerstate(dev, state)); 204} 205 206static int 207vga_pci_get_powerstate(device_t dev, device_t child) 208{ 209 210 device_printf(dev, "child %s requested pci_get_powerstate\n", 211 device_get_nameunit(child)); 212 return (pci_get_powerstate(dev)); 213} 214 215static int 216vga_pci_assign_interrupt(device_t dev, device_t child) 217{ 218 219 device_printf(dev, "child %s requested pci_assign_interrupt\n", 220 device_get_nameunit(child)); 221 return (PCI_ASSIGN_INTERRUPT(device_get_parent(dev), dev)); 222} 223 224static int 225vga_pci_find_extcap(device_t dev, device_t child, int capability, 226 int *capreg) 227{ 228 229 return (pci_find_extcap(dev, capability, capreg)); 230} 231 232static int 233vga_pci_alloc_msi(device_t dev, device_t child, int *count) 234{ 235 struct vga_pci_softc *sc; 236 int error; 237 238 sc = device_get_softc(dev); 239 if (sc->vga_msi_child != NULL) 240 return (EBUSY); 241 error = pci_alloc_msi(dev, count); 242 if (error == 0) 243 sc->vga_msi_child = child; 244 return (error); 245} 246 247static int 248vga_pci_alloc_msix(device_t dev, device_t child, int *count) 249{ 250 struct vga_pci_softc *sc; 251 int error; 252 253 sc = device_get_softc(dev); 254 if (sc->vga_msi_child != NULL) 255 return (EBUSY); 256 error = pci_alloc_msix(dev, count); 257 if (error == 0) 258 sc->vga_msi_child = child; 259 return (error); 260} 261 262static int 263vga_pci_remap_msix(device_t dev, device_t child, int count, 264 const u_int *vectors) 265{ 266 struct vga_pci_softc *sc; 267 268 sc = device_get_softc(dev); 269 if (sc->vga_msi_child != child) 270 return (ENXIO); 271 return (pci_remap_msix(dev, count, vectors)); 272} 273 274static int 275vga_pci_release_msi(device_t dev, device_t child) 276{ 277 struct vga_pci_softc *sc; 278 int error; 279 280 sc = device_get_softc(dev); 281 if (sc->vga_msi_child != child) 282 return (ENXIO); 283 error = pci_release_msi(dev); 284 if (error == 0) 285 sc->vga_msi_child = NULL; 286 return (error); 287} 288 289static int 290vga_pci_msi_count(device_t dev, device_t child) 291{ 292 293 return (pci_msi_count(dev)); 294} 295 296static int 297vga_pci_msix_count(device_t dev, device_t child) 298{ 299 300 return (pci_msix_count(dev)); 301} 302 303static device_method_t vga_pci_methods[] = { 304 /* Device interface */ 305 DEVMETHOD(device_probe, vga_pci_probe), 306 DEVMETHOD(device_attach, vga_pci_attach), 307 DEVMETHOD(device_shutdown, bus_generic_shutdown), 308 DEVMETHOD(device_suspend, vga_pci_suspend), 309 DEVMETHOD(device_resume, vga_pci_resume), 310 311 /* Bus interface */ 312 DEVMETHOD(bus_read_ivar, vga_pci_read_ivar), 313 DEVMETHOD(bus_write_ivar, vga_pci_write_ivar), 314 DEVMETHOD(bus_setup_intr, bus_generic_setup_intr), 315 DEVMETHOD(bus_teardown_intr, bus_generic_teardown_intr), 316 317 DEVMETHOD(bus_alloc_resource, vga_pci_alloc_resource), 318 DEVMETHOD(bus_release_resource, vga_pci_release_resource), 319 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource), 320 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource), 321 322 /* PCI interface */ 323 DEVMETHOD(pci_read_config, vga_pci_read_config), 324 DEVMETHOD(pci_write_config, vga_pci_write_config), 325 DEVMETHOD(pci_enable_busmaster, vga_pci_enable_busmaster), 326 DEVMETHOD(pci_disable_busmaster, vga_pci_disable_busmaster), 327 DEVMETHOD(pci_enable_io, vga_pci_enable_io), 328 DEVMETHOD(pci_disable_io, vga_pci_disable_io), 329 DEVMETHOD(pci_get_vpd_ident, vga_pci_get_vpd_ident), 330 DEVMETHOD(pci_get_vpd_readonly, vga_pci_get_vpd_readonly), 331 DEVMETHOD(pci_get_powerstate, vga_pci_get_powerstate), 332 DEVMETHOD(pci_set_powerstate, vga_pci_set_powerstate), 333 DEVMETHOD(pci_assign_interrupt, vga_pci_assign_interrupt), 334 DEVMETHOD(pci_find_extcap, vga_pci_find_extcap), 335 DEVMETHOD(pci_alloc_msi, vga_pci_alloc_msi), 336 DEVMETHOD(pci_alloc_msix, vga_pci_alloc_msix), 337 DEVMETHOD(pci_remap_msix, vga_pci_remap_msix), 338 DEVMETHOD(pci_release_msi, vga_pci_release_msi), 339 DEVMETHOD(pci_msi_count, vga_pci_msi_count), 340 DEVMETHOD(pci_msix_count, vga_pci_msix_count), 341 342 { 0, 0 } 343}; 344 345static driver_t vga_pci_driver = { 346 "vgapci", 347 vga_pci_methods, 348 sizeof(struct vga_pci_softc), 349}; 350 351static devclass_t vga_devclass; 352 353DRIVER_MODULE(vgapci, pci, vga_pci_driver, vga_devclass, 0, 0); 354