1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2005 John Baldwin <jhb@FreeBSD.org> 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 */ 27 28 #include <sys/cdefs.h> 29 __FBSDID("$FreeBSD$"); 30 31 /* 32 * Simple driver for PCI VGA display devices. Drivers such as agp(4) and 33 * drm(4) should attach as children of this device. 34 * 35 * XXX: The vgapci name is a hack until we somehow merge the isa vga driver 36 * in or rename it. 37 */ 38 39 #include <sys/param.h> 40 #include <sys/bus.h> 41 #include <sys/kernel.h> 42 #include <sys/module.h> 43 #include <sys/rman.h> 44 #include <sys/sysctl.h> 45 #include <sys/systm.h> 46 47 #if defined(__amd64__) || defined(__i386__) 48 #include <vm/vm.h> 49 #include <vm/pmap.h> 50 #endif 51 52 #include <dev/pci/pcireg.h> 53 #include <dev/pci/pcivar.h> 54 55 #include <compat/x86bios/x86bios.h> /* To re-POST the card. */ 56 57 struct vga_resource { 58 struct resource *vr_res; 59 int vr_refs; 60 }; 61 62 struct vga_pci_softc { 63 device_t vga_msi_child; /* Child driver using MSI. */ 64 struct vga_resource vga_bars[PCIR_MAX_BAR_0 + 1]; 65 struct vga_resource vga_bios; 66 }; 67 68 SYSCTL_DECL(_hw_pci); 69 70 static struct vga_resource *lookup_res(struct vga_pci_softc *sc, int rid); 71 static struct resource *vga_pci_alloc_resource(device_t dev, device_t child, 72 int type, int *rid, rman_res_t start, rman_res_t end, rman_res_t count, 73 u_int flags); 74 static int vga_pci_release_resource(device_t dev, device_t child, int type, 75 int rid, struct resource *r); 76 77 int vga_pci_default_unit = -1; 78 SYSCTL_INT(_hw_pci, OID_AUTO, default_vgapci_unit, CTLFLAG_RDTUN, 79 &vga_pci_default_unit, -1, "Default VGA-compatible display"); 80 81 int 82 vga_pci_is_boot_display(device_t dev) 83 { 84 int unit; 85 device_t pcib; 86 uint16_t config; 87 88 /* Check that the given device is a video card */ 89 if ((pci_get_class(dev) != PCIC_DISPLAY && 90 (pci_get_class(dev) != PCIC_OLD || 91 pci_get_subclass(dev) != PCIS_OLD_VGA))) 92 return (0); 93 94 unit = device_get_unit(dev); 95 96 if (vga_pci_default_unit >= 0) { 97 /* 98 * The boot display device was determined by a previous 99 * call to this function, or the user forced it using 100 * the hw.pci.default_vgapci_unit tunable. 101 */ 102 return (vga_pci_default_unit == unit); 103 } 104 105 /* 106 * The primary video card used as a boot display must have the 107 * "I/O" and "Memory Address Space Decoding" bits set in its 108 * Command register. 109 * 110 * Furthermore, if the card is attached to a bridge, instead of 111 * the root PCI bus, the bridge must have the "VGA Enable" bit 112 * set in its Control register. 113 */ 114 115 pcib = device_get_parent(device_get_parent(dev)); 116 if (device_get_devclass(device_get_parent(pcib)) == 117 devclass_find("pci")) { 118 /* 119 * The parent bridge is a PCI-to-PCI bridge: check the 120 * value of the "VGA Enable" bit. 121 */ 122 config = pci_read_config(pcib, PCIR_BRIDGECTL_1, 2); 123 if ((config & PCIB_BCR_VGA_ENABLE) == 0) 124 return (0); 125 } 126 127 config = pci_read_config(dev, PCIR_COMMAND, 2); 128 if ((config & (PCIM_CMD_PORTEN | PCIM_CMD_MEMEN)) == 0) 129 return (0); 130 131 /* 132 * Disable interrupts until a chipset driver is loaded for 133 * this PCI device. Else unhandled display adapter interrupts 134 * might freeze the CPU. 135 */ 136 pci_write_config(dev, PCIR_COMMAND, config | PCIM_CMD_INTxDIS, 2); 137 138 /* This video card is the boot display: record its unit number. */ 139 vga_pci_default_unit = unit; 140 device_set_flags(dev, 1); 141 142 return (1); 143 } 144 145 static void 146 vga_pci_reset(device_t dev) 147 { 148 int ps; 149 /* 150 * FLR is unsupported on GPUs so attempt a power-management reset by cycling 151 * the device in/out of D3 state. 152 * PCI spec says we can only go into D3 state from D0 state. 153 * Transition from D[12] into D0 before going to D3 state. 154 */ 155 ps = pci_get_powerstate(dev); 156 if (ps != PCI_POWERSTATE_D0 && ps != PCI_POWERSTATE_D3) 157 pci_set_powerstate(dev, PCI_POWERSTATE_D0); 158 if (pci_get_powerstate(dev) != PCI_POWERSTATE_D3) 159 pci_set_powerstate(dev, PCI_POWERSTATE_D3); 160 pci_set_powerstate(dev, ps); 161 } 162 163 164 void * 165 vga_pci_map_bios(device_t dev, size_t *size) 166 { 167 struct vga_resource *vr; 168 struct resource *res; 169 device_t pcib; 170 uint32_t rom_addr; 171 uint16_t config; 172 volatile char *bios; 173 int i, rid, found; 174 175 #if defined(__amd64__) || defined(__i386__) 176 if (vga_pci_is_boot_display(dev)) { 177 /* 178 * On x86, the System BIOS copy the default display 179 * device's Video BIOS at a fixed location in system 180 * memory (0xC0000, 128 kBytes long) at boot time. 181 * 182 * We use this copy for the default boot device, because 183 * the original ROM may not be valid after boot. 184 */ 185 186 *size = VGA_PCI_BIOS_SHADOW_SIZE; 187 return (pmap_mapbios(VGA_PCI_BIOS_SHADOW_ADDR, *size)); 188 } 189 #endif 190 191 pcib = device_get_parent(device_get_parent(dev)); 192 if (device_get_devclass(device_get_parent(pcib)) == 193 devclass_find("pci")) { 194 /* 195 * The parent bridge is a PCI-to-PCI bridge: check the 196 * value of the "VGA Enable" bit. 197 */ 198 config = pci_read_config(pcib, PCIR_BRIDGECTL_1, 2); 199 if ((config & PCIB_BCR_VGA_ENABLE) == 0) { 200 config |= PCIB_BCR_VGA_ENABLE; 201 pci_write_config(pcib, PCIR_BRIDGECTL_1, config, 2); 202 } 203 } 204 205 switch(pci_read_config(dev, PCIR_HDRTYPE, 1)) { 206 case PCIM_HDRTYPE_BRIDGE: 207 rid = PCIR_BIOS_1; 208 break; 209 case PCIM_HDRTYPE_CARDBUS: 210 rid = 0; 211 break; 212 default: 213 rid = PCIR_BIOS; 214 break; 215 } 216 if (rid == 0) 217 return (NULL); 218 res = vga_pci_alloc_resource(dev, NULL, SYS_RES_MEMORY, &rid, 0, 219 ~0, 1, RF_ACTIVE); 220 221 if (res == NULL) { 222 device_printf(dev, "vga_pci_alloc_resource failed\n"); 223 return (NULL); 224 } 225 bios = rman_get_virtual(res); 226 *size = rman_get_size(res); 227 for (found = i = 0; i < hz; i++) { 228 found = (bios[0] == 0x55 && bios[1] == 0xaa); 229 if (found) 230 break; 231 pause("vgabios", 1); 232 } 233 if (found) 234 return (__DEVOLATILE(void *, bios)); 235 if (bootverbose) 236 device_printf(dev, "initial ROM mapping failed -- resetting\n"); 237 238 /* 239 * Enable ROM decode 240 */ 241 vga_pci_reset(dev); 242 rom_addr = pci_read_config(dev, rid, 4); 243 rom_addr &= 0x7ff; 244 rom_addr |= rman_get_start(res) | 0x1; 245 pci_write_config(dev, rid, rom_addr, 4); 246 vr = lookup_res(device_get_softc(dev), rid); 247 vga_pci_release_resource(dev, NULL, SYS_RES_MEMORY, rid, 248 vr->vr_res); 249 250 /* 251 * re-allocate 252 */ 253 res = vga_pci_alloc_resource(dev, NULL, SYS_RES_MEMORY, &rid, 0, 254 ~0, 1, RF_ACTIVE); 255 if (res == NULL) { 256 device_printf(dev, "vga_pci_alloc_resource failed\n"); 257 return (NULL); 258 } 259 bios = rman_get_virtual(res); 260 *size = rman_get_size(res); 261 for (found = i = 0; i < 3*hz; i++) { 262 found = (bios[0] == 0x55 && bios[1] == 0xaa); 263 if (found) 264 break; 265 pause("vgabios", 1); 266 } 267 if (found) 268 return (__DEVOLATILE(void *, bios)); 269 device_printf(dev, "ROM mapping failed\n"); 270 vr = lookup_res(device_get_softc(dev), rid); 271 vga_pci_release_resource(dev, NULL, SYS_RES_MEMORY, rid, 272 vr->vr_res); 273 return (NULL); 274 } 275 276 void 277 vga_pci_unmap_bios(device_t dev, void *bios) 278 { 279 struct vga_resource *vr; 280 int rid; 281 282 if (bios == NULL) { 283 return; 284 } 285 286 #if defined(__amd64__) || defined(__i386__) 287 if (vga_pci_is_boot_display(dev)) { 288 /* We mapped the BIOS shadow copy located at 0xC0000. */ 289 pmap_unmapdev((vm_offset_t)bios, VGA_PCI_BIOS_SHADOW_SIZE); 290 291 return; 292 } 293 #endif 294 switch(pci_read_config(dev, PCIR_HDRTYPE, 1)) { 295 case PCIM_HDRTYPE_BRIDGE: 296 rid = PCIR_BIOS_1; 297 break; 298 case PCIM_HDRTYPE_CARDBUS: 299 rid = 0; 300 break; 301 default: 302 rid = PCIR_BIOS; 303 break; 304 } 305 if (rid == 0) 306 return; 307 /* 308 * Look up the PCIR_BIOS resource in our softc. It should match 309 * the address we returned previously. 310 */ 311 vr = lookup_res(device_get_softc(dev), rid); 312 KASSERT(vr->vr_res != NULL, ("vga_pci_unmap_bios: bios not mapped")); 313 KASSERT(rman_get_virtual(vr->vr_res) == bios, 314 ("vga_pci_unmap_bios: mismatch")); 315 vga_pci_release_resource(dev, NULL, SYS_RES_MEMORY, rid, 316 vr->vr_res); 317 } 318 319 int 320 vga_pci_repost(device_t dev) 321 { 322 #if defined(__amd64__) || defined(__i386__) 323 x86regs_t regs; 324 325 if (!vga_pci_is_boot_display(dev)) 326 return (EINVAL); 327 328 if (x86bios_get_orm(VGA_PCI_BIOS_SHADOW_ADDR) == NULL) 329 return (ENOTSUP); 330 331 x86bios_init_regs(®s); 332 333 regs.R_AH = pci_get_bus(dev); 334 regs.R_AL = (pci_get_slot(dev) << 3) | (pci_get_function(dev) & 0x07); 335 regs.R_DL = 0x80; 336 337 device_printf(dev, "REPOSTing\n"); 338 x86bios_call(®s, X86BIOS_PHYSTOSEG(VGA_PCI_BIOS_SHADOW_ADDR + 3), 339 X86BIOS_PHYSTOOFF(VGA_PCI_BIOS_SHADOW_ADDR + 3)); 340 341 x86bios_get_intr(0x10); 342 343 return (0); 344 #else 345 return (ENOTSUP); 346 #endif 347 } 348 349 static int 350 vga_pci_probe(device_t dev) 351 { 352 353 switch (pci_get_class(dev)) { 354 case PCIC_DISPLAY: 355 break; 356 case PCIC_OLD: 357 if (pci_get_subclass(dev) != PCIS_OLD_VGA) 358 return (ENXIO); 359 break; 360 default: 361 return (ENXIO); 362 } 363 364 /* Probe default display. */ 365 vga_pci_is_boot_display(dev); 366 367 device_set_desc(dev, "VGA-compatible display"); 368 return (BUS_PROBE_GENERIC); 369 } 370 371 static int 372 vga_pci_attach(device_t dev) 373 { 374 375 bus_generic_probe(dev); 376 377 /* Always create a drm child for now to make it easier on drm. */ 378 device_add_child(dev, "drm", -1); 379 device_add_child(dev, "drmn", -1); 380 bus_generic_attach(dev); 381 382 if (vga_pci_is_boot_display(dev)) 383 device_printf(dev, "Boot video device\n"); 384 385 return (0); 386 } 387 388 static int 389 vga_pci_suspend(device_t dev) 390 { 391 392 return (bus_generic_suspend(dev)); 393 } 394 395 static int 396 vga_pci_detach(device_t dev) 397 { 398 int error; 399 400 error = bus_generic_detach(dev); 401 if (error == 0) 402 error = device_delete_children(dev); 403 return (error); 404 } 405 406 static int 407 vga_pci_resume(device_t dev) 408 { 409 410 return (bus_generic_resume(dev)); 411 } 412 413 /* Bus interface. */ 414 415 static int 416 vga_pci_read_ivar(device_t dev, device_t child, int which, uintptr_t *result) 417 { 418 419 return (BUS_READ_IVAR(device_get_parent(dev), dev, which, result)); 420 } 421 422 static int 423 vga_pci_write_ivar(device_t dev, device_t child, int which, uintptr_t value) 424 { 425 426 return (EINVAL); 427 } 428 429 static int 430 vga_pci_setup_intr(device_t dev, device_t child, struct resource *irq, 431 int flags, driver_filter_t *filter, driver_intr_t *intr, void *arg, 432 void **cookiep) 433 { 434 return (BUS_SETUP_INTR(device_get_parent(dev), dev, irq, flags, 435 filter, intr, arg, cookiep)); 436 } 437 438 static int 439 vga_pci_teardown_intr(device_t dev, device_t child, struct resource *irq, 440 void *cookie) 441 { 442 return (BUS_TEARDOWN_INTR(device_get_parent(dev), dev, irq, cookie)); 443 } 444 445 static struct vga_resource * 446 lookup_res(struct vga_pci_softc *sc, int rid) 447 { 448 int bar; 449 450 if (rid == PCIR_BIOS) 451 return (&sc->vga_bios); 452 bar = PCI_RID2BAR(rid); 453 if (bar >= 0 && bar <= PCIR_MAX_BAR_0) 454 return (&sc->vga_bars[bar]); 455 return (NULL); 456 } 457 458 static struct resource * 459 vga_pci_alloc_resource(device_t dev, device_t child, int type, int *rid, 460 rman_res_t start, rman_res_t end, rman_res_t count, u_int flags) 461 { 462 struct vga_resource *vr; 463 464 switch (type) { 465 case SYS_RES_MEMORY: 466 case SYS_RES_IOPORT: 467 /* 468 * For BARs, we cache the resource so that we only allocate it 469 * from the PCI bus once. 470 */ 471 vr = lookup_res(device_get_softc(dev), *rid); 472 if (vr == NULL) 473 return (NULL); 474 if (vr->vr_res == NULL) 475 vr->vr_res = bus_alloc_resource(dev, type, rid, start, 476 end, count, flags); 477 if (vr->vr_res != NULL) 478 vr->vr_refs++; 479 return (vr->vr_res); 480 } 481 return (bus_alloc_resource(dev, type, rid, start, end, count, flags)); 482 } 483 484 static int 485 vga_pci_release_resource(device_t dev, device_t child, int type, int rid, 486 struct resource *r) 487 { 488 struct vga_resource *vr; 489 int error; 490 491 switch (type) { 492 case SYS_RES_MEMORY: 493 case SYS_RES_IOPORT: 494 /* 495 * For BARs, we release the resource from the PCI bus 496 * when the last child reference goes away. 497 */ 498 vr = lookup_res(device_get_softc(dev), rid); 499 if (vr == NULL) 500 return (EINVAL); 501 if (vr->vr_res == NULL) 502 return (EINVAL); 503 KASSERT(vr->vr_res == r, ("vga_pci resource mismatch")); 504 if (vr->vr_refs > 1) { 505 vr->vr_refs--; 506 return (0); 507 } 508 KASSERT(vr->vr_refs > 0, 509 ("vga_pci resource reference count underflow")); 510 error = bus_release_resource(dev, type, rid, r); 511 if (error == 0) { 512 vr->vr_res = NULL; 513 vr->vr_refs = 0; 514 } 515 return (error); 516 } 517 518 return (bus_release_resource(dev, type, rid, r)); 519 } 520 521 /* PCI interface. */ 522 523 static uint32_t 524 vga_pci_read_config(device_t dev, device_t child, int reg, int width) 525 { 526 527 return (pci_read_config(dev, reg, width)); 528 } 529 530 static void 531 vga_pci_write_config(device_t dev, device_t child, int reg, 532 uint32_t val, int width) 533 { 534 535 pci_write_config(dev, reg, val, width); 536 } 537 538 static int 539 vga_pci_enable_busmaster(device_t dev, device_t child) 540 { 541 542 return (pci_enable_busmaster(dev)); 543 } 544 545 static int 546 vga_pci_disable_busmaster(device_t dev, device_t child) 547 { 548 549 return (pci_disable_busmaster(dev)); 550 } 551 552 static int 553 vga_pci_enable_io(device_t dev, device_t child, int space) 554 { 555 556 device_printf(dev, "child %s requested pci_enable_io\n", 557 device_get_nameunit(child)); 558 return (pci_enable_io(dev, space)); 559 } 560 561 static int 562 vga_pci_disable_io(device_t dev, device_t child, int space) 563 { 564 565 device_printf(dev, "child %s requested pci_disable_io\n", 566 device_get_nameunit(child)); 567 return (pci_disable_io(dev, space)); 568 } 569 570 static int 571 vga_pci_get_vpd_ident(device_t dev, device_t child, const char **identptr) 572 { 573 574 return (pci_get_vpd_ident(dev, identptr)); 575 } 576 577 static int 578 vga_pci_get_vpd_readonly(device_t dev, device_t child, const char *kw, 579 const char **vptr) 580 { 581 582 return (pci_get_vpd_readonly(dev, kw, vptr)); 583 } 584 585 static int 586 vga_pci_set_powerstate(device_t dev, device_t child, int state) 587 { 588 589 device_printf(dev, "child %s requested pci_set_powerstate\n", 590 device_get_nameunit(child)); 591 return (pci_set_powerstate(dev, state)); 592 } 593 594 static int 595 vga_pci_get_powerstate(device_t dev, device_t child) 596 { 597 598 device_printf(dev, "child %s requested pci_get_powerstate\n", 599 device_get_nameunit(child)); 600 return (pci_get_powerstate(dev)); 601 } 602 603 static int 604 vga_pci_assign_interrupt(device_t dev, device_t child) 605 { 606 607 device_printf(dev, "child %s requested pci_assign_interrupt\n", 608 device_get_nameunit(child)); 609 return (PCI_ASSIGN_INTERRUPT(device_get_parent(dev), dev)); 610 } 611 612 static int 613 vga_pci_find_cap(device_t dev, device_t child, int capability, 614 int *capreg) 615 { 616 617 return (pci_find_cap(dev, capability, capreg)); 618 } 619 620 static int 621 vga_pci_find_next_cap(device_t dev, device_t child, int capability, 622 int start, int *capreg) 623 { 624 625 return (pci_find_next_cap(dev, capability, start, capreg)); 626 } 627 628 static int 629 vga_pci_find_extcap(device_t dev, device_t child, int capability, 630 int *capreg) 631 { 632 633 return (pci_find_extcap(dev, capability, capreg)); 634 } 635 636 static int 637 vga_pci_find_next_extcap(device_t dev, device_t child, int capability, 638 int start, int *capreg) 639 { 640 641 return (pci_find_next_extcap(dev, capability, start, capreg)); 642 } 643 644 static int 645 vga_pci_find_htcap(device_t dev, device_t child, int capability, 646 int *capreg) 647 { 648 649 return (pci_find_htcap(dev, capability, capreg)); 650 } 651 652 static int 653 vga_pci_find_next_htcap(device_t dev, device_t child, int capability, 654 int start, int *capreg) 655 { 656 657 return (pci_find_next_htcap(dev, capability, start, capreg)); 658 } 659 660 static int 661 vga_pci_alloc_msi(device_t dev, device_t child, int *count) 662 { 663 struct vga_pci_softc *sc; 664 int error; 665 666 sc = device_get_softc(dev); 667 if (sc->vga_msi_child != NULL) 668 return (EBUSY); 669 error = pci_alloc_msi(dev, count); 670 if (error == 0) 671 sc->vga_msi_child = child; 672 return (error); 673 } 674 675 static int 676 vga_pci_alloc_msix(device_t dev, device_t child, int *count) 677 { 678 struct vga_pci_softc *sc; 679 int error; 680 681 sc = device_get_softc(dev); 682 if (sc->vga_msi_child != NULL) 683 return (EBUSY); 684 error = pci_alloc_msix(dev, count); 685 if (error == 0) 686 sc->vga_msi_child = child; 687 return (error); 688 } 689 690 static int 691 vga_pci_remap_msix(device_t dev, device_t child, int count, 692 const u_int *vectors) 693 { 694 struct vga_pci_softc *sc; 695 696 sc = device_get_softc(dev); 697 if (sc->vga_msi_child != child) 698 return (ENXIO); 699 return (pci_remap_msix(dev, count, vectors)); 700 } 701 702 static int 703 vga_pci_release_msi(device_t dev, device_t child) 704 { 705 struct vga_pci_softc *sc; 706 int error; 707 708 sc = device_get_softc(dev); 709 if (sc->vga_msi_child != child) 710 return (ENXIO); 711 error = pci_release_msi(dev); 712 if (error == 0) 713 sc->vga_msi_child = NULL; 714 return (error); 715 } 716 717 static int 718 vga_pci_msi_count(device_t dev, device_t child) 719 { 720 721 return (pci_msi_count(dev)); 722 } 723 724 static int 725 vga_pci_msix_count(device_t dev, device_t child) 726 { 727 728 return (pci_msix_count(dev)); 729 } 730 731 static bus_dma_tag_t 732 vga_pci_get_dma_tag(device_t bus, device_t child) 733 { 734 735 return (bus_get_dma_tag(bus)); 736 } 737 738 static device_method_t vga_pci_methods[] = { 739 /* Device interface */ 740 DEVMETHOD(device_probe, vga_pci_probe), 741 DEVMETHOD(device_attach, vga_pci_attach), 742 DEVMETHOD(device_shutdown, bus_generic_shutdown), 743 DEVMETHOD(device_suspend, vga_pci_suspend), 744 DEVMETHOD(device_detach, vga_pci_detach), 745 DEVMETHOD(device_resume, vga_pci_resume), 746 747 /* Bus interface */ 748 DEVMETHOD(bus_read_ivar, vga_pci_read_ivar), 749 DEVMETHOD(bus_write_ivar, vga_pci_write_ivar), 750 DEVMETHOD(bus_setup_intr, vga_pci_setup_intr), 751 DEVMETHOD(bus_teardown_intr, vga_pci_teardown_intr), 752 DEVMETHOD(bus_alloc_resource, vga_pci_alloc_resource), 753 DEVMETHOD(bus_release_resource, vga_pci_release_resource), 754 DEVMETHOD(bus_activate_resource, bus_generic_activate_resource), 755 DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource), 756 DEVMETHOD(bus_get_dma_tag, vga_pci_get_dma_tag), 757 758 /* PCI interface */ 759 DEVMETHOD(pci_read_config, vga_pci_read_config), 760 DEVMETHOD(pci_write_config, vga_pci_write_config), 761 DEVMETHOD(pci_enable_busmaster, vga_pci_enable_busmaster), 762 DEVMETHOD(pci_disable_busmaster, vga_pci_disable_busmaster), 763 DEVMETHOD(pci_enable_io, vga_pci_enable_io), 764 DEVMETHOD(pci_disable_io, vga_pci_disable_io), 765 DEVMETHOD(pci_get_vpd_ident, vga_pci_get_vpd_ident), 766 DEVMETHOD(pci_get_vpd_readonly, vga_pci_get_vpd_readonly), 767 DEVMETHOD(pci_get_powerstate, vga_pci_get_powerstate), 768 DEVMETHOD(pci_set_powerstate, vga_pci_set_powerstate), 769 DEVMETHOD(pci_assign_interrupt, vga_pci_assign_interrupt), 770 DEVMETHOD(pci_find_cap, vga_pci_find_cap), 771 DEVMETHOD(pci_find_next_cap, vga_pci_find_next_cap), 772 DEVMETHOD(pci_find_extcap, vga_pci_find_extcap), 773 DEVMETHOD(pci_find_next_extcap, vga_pci_find_next_extcap), 774 DEVMETHOD(pci_find_htcap, vga_pci_find_htcap), 775 DEVMETHOD(pci_find_next_htcap, vga_pci_find_next_htcap), 776 DEVMETHOD(pci_alloc_msi, vga_pci_alloc_msi), 777 DEVMETHOD(pci_alloc_msix, vga_pci_alloc_msix), 778 DEVMETHOD(pci_remap_msix, vga_pci_remap_msix), 779 DEVMETHOD(pci_release_msi, vga_pci_release_msi), 780 DEVMETHOD(pci_msi_count, vga_pci_msi_count), 781 DEVMETHOD(pci_msix_count, vga_pci_msix_count), 782 783 { 0, 0 } 784 }; 785 786 static driver_t vga_pci_driver = { 787 "vgapci", 788 vga_pci_methods, 789 sizeof(struct vga_pci_softc), 790 }; 791 792 static devclass_t vga_devclass; 793 794 DRIVER_MODULE(vgapci, pci, vga_pci_driver, vga_devclass, 0, 0); 795 MODULE_DEPEND(vgapci, x86bios, 1, 1, 1); 796