1 /*- 2 * Copyright (c) 2000 Doug Rabson 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 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 * $FreeBSD$ 27 */ 28 29 #include "opt_bus.h" 30 #include "opt_pci.h" 31 32 #include <sys/param.h> 33 #include <sys/systm.h> 34 #include <sys/malloc.h> 35 #include <sys/kernel.h> 36 #include <sys/bus.h> 37 #include <sys/conf.h> 38 #include <sys/ioccom.h> 39 #include <sys/agpio.h> 40 #include <sys/lock.h> 41 #include <sys/mutex.h> 42 #include <sys/proc.h> 43 44 #include <pci/pcivar.h> 45 #include <pci/pcireg.h> 46 #include <pci/agppriv.h> 47 #include <pci/agpvar.h> 48 #include <pci/agpreg.h> 49 50 #include <vm/vm.h> 51 #include <vm/vm_object.h> 52 #include <vm/vm_page.h> 53 #include <vm/vm_pageout.h> 54 #include <vm/pmap.h> 55 56 #include <machine/md_var.h> 57 #include <machine/bus.h> 58 #include <machine/resource.h> 59 #include <sys/rman.h> 60 61 MODULE_VERSION(agp, 1); 62 63 MALLOC_DEFINE(M_AGP, "agp", "AGP data structures"); 64 65 #define CDEV_MAJOR 148 66 /* agp_drv.c */ 67 static d_open_t agp_open; 68 static d_close_t agp_close; 69 static d_ioctl_t agp_ioctl; 70 static d_mmap_t agp_mmap; 71 72 static struct cdevsw agp_cdevsw = { 73 /* open */ agp_open, 74 /* close */ agp_close, 75 /* read */ noread, 76 /* write */ nowrite, 77 /* ioctl */ agp_ioctl, 78 /* poll */ nopoll, 79 /* mmap */ agp_mmap, 80 /* strategy */ nostrategy, 81 /* name */ "agp", 82 /* maj */ CDEV_MAJOR, 83 /* dump */ nodump, 84 /* psize */ nopsize, 85 /* flags */ D_TTY, 86 }; 87 88 static devclass_t agp_devclass; 89 #define KDEV2DEV(kdev) devclass_get_device(agp_devclass, minor(kdev)) 90 91 /* Helper functions for implementing chipset mini drivers. */ 92 93 void 94 agp_flush_cache() 95 { 96 #ifdef __i386__ 97 wbinvd(); 98 #endif 99 } 100 101 u_int8_t 102 agp_find_caps(device_t dev) 103 { 104 u_int32_t status; 105 u_int8_t ptr, next; 106 107 /* 108 * Check the CAP_LIST bit of the PCI status register first. 109 */ 110 status = pci_read_config(dev, PCIR_STATUS, 2); 111 if (!(status & 0x10)) 112 return 0; 113 114 /* 115 * Traverse the capabilities list. 116 */ 117 for (ptr = pci_read_config(dev, AGP_CAPPTR, 1); 118 ptr != 0; 119 ptr = next) { 120 u_int32_t capid = pci_read_config(dev, ptr, 4); 121 next = AGP_CAPID_GET_NEXT_PTR(capid); 122 123 /* 124 * If this capability entry ID is 2, then we are done. 125 */ 126 if (AGP_CAPID_GET_CAP_ID(capid) == 2) 127 return ptr; 128 } 129 130 return 0; 131 } 132 133 /* 134 * Find an AGP display device (if any). 135 */ 136 static device_t 137 agp_find_display(void) 138 { 139 devclass_t pci = devclass_find("pci"); 140 device_t bus, dev = 0; 141 device_t *kids; 142 int busnum, numkids, i; 143 144 for (busnum = 0; busnum < devclass_get_maxunit(pci); busnum++) { 145 bus = devclass_get_device(pci, busnum); 146 if (!bus) 147 continue; 148 device_get_children(bus, &kids, &numkids); 149 for (i = 0; i < numkids; i++) { 150 dev = kids[i]; 151 if (pci_get_class(dev) == PCIC_DISPLAY 152 && pci_get_subclass(dev) == PCIS_DISPLAY_VGA) 153 if (agp_find_caps(dev)) { 154 free(kids, M_TEMP); 155 return dev; 156 } 157 158 } 159 free(kids, M_TEMP); 160 } 161 162 return 0; 163 } 164 165 struct agp_gatt * 166 agp_alloc_gatt(device_t dev) 167 { 168 u_int32_t apsize = AGP_GET_APERTURE(dev); 169 u_int32_t entries = apsize >> AGP_PAGE_SHIFT; 170 struct agp_gatt *gatt; 171 172 if (bootverbose) 173 device_printf(dev, 174 "allocating GATT for aperture of size %dM\n", 175 apsize / (1024*1024)); 176 177 gatt = malloc(sizeof(struct agp_gatt), M_AGP, M_NOWAIT); 178 if (!gatt) 179 return 0; 180 181 gatt->ag_entries = entries; 182 gatt->ag_virtual = contigmalloc(entries * sizeof(u_int32_t), M_AGP, 0, 183 0, ~0, PAGE_SIZE, 0); 184 if (!gatt->ag_virtual) { 185 if (bootverbose) 186 device_printf(dev, "contiguous allocation failed\n"); 187 free(gatt, M_AGP); 188 return 0; 189 } 190 bzero(gatt->ag_virtual, entries * sizeof(u_int32_t)); 191 gatt->ag_physical = vtophys((vm_offset_t) gatt->ag_virtual); 192 agp_flush_cache(); 193 194 return gatt; 195 } 196 197 void 198 agp_free_gatt(struct agp_gatt *gatt) 199 { 200 contigfree(gatt->ag_virtual, 201 gatt->ag_entries * sizeof(u_int32_t), M_AGP); 202 free(gatt, M_AGP); 203 } 204 205 static int agp_max[][2] = { 206 {0, 0}, 207 {32, 4}, 208 {64, 28}, 209 {128, 96}, 210 {256, 204}, 211 {512, 440}, 212 {1024, 942}, 213 {2048, 1920}, 214 {4096, 3932} 215 }; 216 #define agp_max_size (sizeof(agp_max) / sizeof(agp_max[0])) 217 218 int 219 agp_generic_attach(device_t dev) 220 { 221 struct agp_softc *sc = device_get_softc(dev); 222 int rid, memsize, i; 223 224 /* 225 * Find and map the aperture. 226 */ 227 rid = AGP_APBASE; 228 sc->as_aperture = bus_alloc_resource(dev, SYS_RES_MEMORY, &rid, 229 0, ~0, 1, RF_ACTIVE); 230 if (!sc->as_aperture) 231 return ENOMEM; 232 233 /* 234 * Work out an upper bound for agp memory allocation. This 235 * uses a heurisitc table from the Linux driver. 236 */ 237 memsize = ptoa(Maxmem) >> 20; 238 for (i = 0; i < agp_max_size; i++) { 239 if (memsize <= agp_max[i][0]) 240 break; 241 } 242 if (i == agp_max_size) i = agp_max_size - 1; 243 sc->as_maxmem = agp_max[i][1] << 20U; 244 245 /* 246 * The lock is used to prevent re-entry to 247 * agp_generic_bind_memory() since that function can sleep. 248 */ 249 lockinit(&sc->as_lock, PZERO|PCATCH, "agplk", 0, 0); 250 251 /* 252 * Initialise stuff for the userland device. 253 */ 254 agp_devclass = devclass_find("agp"); 255 TAILQ_INIT(&sc->as_memory); 256 sc->as_nextid = 1; 257 258 sc->as_devnode = make_dev(&agp_cdevsw, 259 device_get_unit(dev), 260 UID_ROOT, 261 GID_WHEEL, 262 0600, 263 "agpgart"); 264 265 return 0; 266 } 267 268 int 269 agp_generic_detach(device_t dev) 270 { 271 struct agp_softc *sc = device_get_softc(dev); 272 bus_release_resource(dev, SYS_RES_MEMORY, AGP_APBASE, sc->as_aperture); 273 lockmgr(&sc->as_lock, LK_DRAIN, 0, curthread); 274 lockdestroy(&sc->as_lock); 275 destroy_dev(sc->as_devnode); 276 agp_flush_cache(); 277 return 0; 278 } 279 280 int 281 agp_generic_enable(device_t dev, u_int32_t mode) 282 { 283 device_t mdev = agp_find_display(); 284 u_int32_t tstatus, mstatus; 285 u_int32_t command; 286 int rq, sba, fw, rate;; 287 288 if (!mdev) { 289 AGP_DPF("can't find display\n"); 290 return ENXIO; 291 } 292 293 tstatus = pci_read_config(dev, agp_find_caps(dev) + AGP_STATUS, 4); 294 mstatus = pci_read_config(mdev, agp_find_caps(mdev) + AGP_STATUS, 4); 295 296 /* Set RQ to the min of mode, tstatus and mstatus */ 297 rq = AGP_MODE_GET_RQ(mode); 298 if (AGP_MODE_GET_RQ(tstatus) < rq) 299 rq = AGP_MODE_GET_RQ(tstatus); 300 if (AGP_MODE_GET_RQ(mstatus) < rq) 301 rq = AGP_MODE_GET_RQ(mstatus); 302 303 /* Set SBA if all three can deal with SBA */ 304 sba = (AGP_MODE_GET_SBA(tstatus) 305 & AGP_MODE_GET_SBA(mstatus) 306 & AGP_MODE_GET_SBA(mode)); 307 308 /* Similar for FW */ 309 fw = (AGP_MODE_GET_FW(tstatus) 310 & AGP_MODE_GET_FW(mstatus) 311 & AGP_MODE_GET_FW(mode)); 312 313 /* Figure out the max rate */ 314 rate = (AGP_MODE_GET_RATE(tstatus) 315 & AGP_MODE_GET_RATE(mstatus) 316 & AGP_MODE_GET_RATE(mode)); 317 if (rate & AGP_MODE_RATE_4x) 318 rate = AGP_MODE_RATE_4x; 319 else if (rate & AGP_MODE_RATE_2x) 320 rate = AGP_MODE_RATE_2x; 321 else 322 rate = AGP_MODE_RATE_1x; 323 324 /* Construct the new mode word and tell the hardware */ 325 command = AGP_MODE_SET_RQ(0, rq); 326 command = AGP_MODE_SET_SBA(command, sba); 327 command = AGP_MODE_SET_FW(command, fw); 328 command = AGP_MODE_SET_RATE(command, rate); 329 command = AGP_MODE_SET_AGP(command, 1); 330 pci_write_config(dev, agp_find_caps(dev) + AGP_COMMAND, command, 4); 331 pci_write_config(mdev, agp_find_caps(mdev) + AGP_COMMAND, command, 4); 332 333 return 0; 334 } 335 336 struct agp_memory * 337 agp_generic_alloc_memory(device_t dev, int type, vm_size_t size) 338 { 339 struct agp_softc *sc = device_get_softc(dev); 340 struct agp_memory *mem; 341 342 if ((size & (AGP_PAGE_SIZE - 1)) != 0) 343 return 0; 344 345 if (sc->as_allocated + size > sc->as_maxmem) 346 return 0; 347 348 if (type != 0) { 349 printf("agp_generic_alloc_memory: unsupported type %d\n", 350 type); 351 return 0; 352 } 353 354 mem = malloc(sizeof *mem, M_AGP, M_WAITOK); 355 mem->am_id = sc->as_nextid++; 356 mem->am_size = size; 357 mem->am_type = 0; 358 mem->am_obj = vm_object_allocate(OBJT_DEFAULT, atop(round_page(size))); 359 mem->am_physical = 0; 360 mem->am_offset = 0; 361 mem->am_is_bound = 0; 362 TAILQ_INSERT_TAIL(&sc->as_memory, mem, am_link); 363 sc->as_allocated += size; 364 365 return mem; 366 } 367 368 int 369 agp_generic_free_memory(device_t dev, struct agp_memory *mem) 370 { 371 struct agp_softc *sc = device_get_softc(dev); 372 373 if (mem->am_is_bound) 374 return EBUSY; 375 376 sc->as_allocated -= mem->am_size; 377 TAILQ_REMOVE(&sc->as_memory, mem, am_link); 378 vm_object_deallocate(mem->am_obj); 379 free(mem, M_AGP); 380 return 0; 381 } 382 383 int 384 agp_generic_bind_memory(device_t dev, struct agp_memory *mem, 385 vm_offset_t offset) 386 { 387 struct agp_softc *sc = device_get_softc(dev); 388 vm_offset_t i, j, k; 389 vm_page_t m; 390 int error; 391 392 lockmgr(&sc->as_lock, LK_EXCLUSIVE, 0, curthread); 393 394 if (mem->am_is_bound) { 395 device_printf(dev, "memory already bound\n"); 396 return EINVAL; 397 } 398 399 if (offset < 0 400 || (offset & (AGP_PAGE_SIZE - 1)) != 0 401 || offset + mem->am_size > AGP_GET_APERTURE(dev)) { 402 device_printf(dev, "binding memory at bad offset %#x\n", 403 (int) offset); 404 return EINVAL; 405 } 406 407 /* 408 * Bind the individual pages and flush the chipset's 409 * TLB. 410 * 411 * XXX Presumably, this needs to be the pci address on alpha 412 * (i.e. use alpha_XXX_dmamap()). I don't have access to any 413 * alpha AGP hardware to check. 414 */ 415 for (i = 0; i < mem->am_size; i += PAGE_SIZE) { 416 /* 417 * Find a page from the object and wire it 418 * down. This page will be mapped using one or more 419 * entries in the GATT (assuming that PAGE_SIZE >= 420 * AGP_PAGE_SIZE. If this is the first call to bind, 421 * the pages will be allocated and zeroed. 422 */ 423 m = vm_page_grab(mem->am_obj, OFF_TO_IDX(i), 424 VM_ALLOC_ZERO | VM_ALLOC_RETRY); 425 AGP_DPF("found page pa=%#x\n", VM_PAGE_TO_PHYS(m)); 426 vm_page_lock_queues(); 427 vm_page_wire(m); 428 vm_page_unlock_queues(); 429 430 /* 431 * Install entries in the GATT, making sure that if 432 * AGP_PAGE_SIZE < PAGE_SIZE and mem->am_size is not 433 * aligned to PAGE_SIZE, we don't modify too many GATT 434 * entries. 435 */ 436 for (j = 0; j < PAGE_SIZE && i + j < mem->am_size; 437 j += AGP_PAGE_SIZE) { 438 vm_offset_t pa = VM_PAGE_TO_PHYS(m) + j; 439 AGP_DPF("binding offset %#x to pa %#x\n", 440 offset + i + j, pa); 441 error = AGP_BIND_PAGE(dev, offset + i + j, pa); 442 if (error) { 443 /* 444 * Bail out. Reverse all the mappings 445 * and unwire the pages. 446 */ 447 vm_page_wakeup(m); 448 for (k = 0; k < i + j; k += AGP_PAGE_SIZE) 449 AGP_UNBIND_PAGE(dev, offset + k); 450 for (k = 0; k <= i; k += PAGE_SIZE) { 451 m = vm_page_lookup(mem->am_obj, 452 OFF_TO_IDX(k)); 453 vm_page_lock_queues(); 454 vm_page_unwire(m, 0); 455 vm_page_unlock_queues(); 456 } 457 lockmgr(&sc->as_lock, LK_RELEASE, 0, curthread); 458 return error; 459 } 460 } 461 vm_page_wakeup(m); 462 } 463 464 /* 465 * Flush the cpu cache since we are providing a new mapping 466 * for these pages. 467 */ 468 agp_flush_cache(); 469 470 /* 471 * Make sure the chipset gets the new mappings. 472 */ 473 AGP_FLUSH_TLB(dev); 474 475 mem->am_offset = offset; 476 mem->am_is_bound = 1; 477 478 lockmgr(&sc->as_lock, LK_RELEASE, 0, curthread); 479 480 return 0; 481 } 482 483 int 484 agp_generic_unbind_memory(device_t dev, struct agp_memory *mem) 485 { 486 struct agp_softc *sc = device_get_softc(dev); 487 vm_page_t m; 488 int i; 489 490 lockmgr(&sc->as_lock, LK_EXCLUSIVE, 0, curthread); 491 492 if (!mem->am_is_bound) { 493 device_printf(dev, "memory is not bound\n"); 494 return EINVAL; 495 } 496 497 498 /* 499 * Unbind the individual pages and flush the chipset's 500 * TLB. Unwire the pages so they can be swapped. 501 */ 502 for (i = 0; i < mem->am_size; i += AGP_PAGE_SIZE) 503 AGP_UNBIND_PAGE(dev, mem->am_offset + i); 504 for (i = 0; i < mem->am_size; i += PAGE_SIZE) { 505 m = vm_page_lookup(mem->am_obj, atop(i)); 506 vm_page_lock_queues(); 507 vm_page_unwire(m, 0); 508 vm_page_unlock_queues(); 509 } 510 511 agp_flush_cache(); 512 AGP_FLUSH_TLB(dev); 513 514 mem->am_offset = 0; 515 mem->am_is_bound = 0; 516 517 lockmgr(&sc->as_lock, LK_RELEASE, 0, curthread); 518 519 return 0; 520 } 521 522 /* Helper functions for implementing user/kernel api */ 523 524 static int 525 agp_acquire_helper(device_t dev, enum agp_acquire_state state) 526 { 527 struct agp_softc *sc = device_get_softc(dev); 528 529 if (sc->as_state != AGP_ACQUIRE_FREE) 530 return EBUSY; 531 sc->as_state = state; 532 533 return 0; 534 } 535 536 static int 537 agp_release_helper(device_t dev, enum agp_acquire_state state) 538 { 539 struct agp_softc *sc = device_get_softc(dev); 540 541 if (sc->as_state == AGP_ACQUIRE_FREE) 542 return 0; 543 544 if (sc->as_state != state) 545 return EBUSY; 546 547 sc->as_state = AGP_ACQUIRE_FREE; 548 return 0; 549 } 550 551 static struct agp_memory * 552 agp_find_memory(device_t dev, int id) 553 { 554 struct agp_softc *sc = device_get_softc(dev); 555 struct agp_memory *mem; 556 557 AGP_DPF("searching for memory block %d\n", id); 558 TAILQ_FOREACH(mem, &sc->as_memory, am_link) { 559 AGP_DPF("considering memory block %d\n", mem->am_id); 560 if (mem->am_id == id) 561 return mem; 562 } 563 return 0; 564 } 565 566 /* Implementation of the userland ioctl api */ 567 568 static int 569 agp_info_user(device_t dev, agp_info *info) 570 { 571 struct agp_softc *sc = device_get_softc(dev); 572 573 bzero(info, sizeof *info); 574 info->bridge_id = pci_get_devid(dev); 575 info->agp_mode = 576 pci_read_config(dev, agp_find_caps(dev) + AGP_STATUS, 4); 577 info->aper_base = rman_get_start(sc->as_aperture); 578 info->aper_size = AGP_GET_APERTURE(dev) >> 20; 579 info->pg_total = info->pg_system = sc->as_maxmem >> AGP_PAGE_SHIFT; 580 info->pg_used = sc->as_allocated >> AGP_PAGE_SHIFT; 581 582 return 0; 583 } 584 585 static int 586 agp_setup_user(device_t dev, agp_setup *setup) 587 { 588 return AGP_ENABLE(dev, setup->agp_mode); 589 } 590 591 static int 592 agp_allocate_user(device_t dev, agp_allocate *alloc) 593 { 594 struct agp_memory *mem; 595 596 mem = AGP_ALLOC_MEMORY(dev, 597 alloc->type, 598 alloc->pg_count << AGP_PAGE_SHIFT); 599 if (mem) { 600 alloc->key = mem->am_id; 601 alloc->physical = mem->am_physical; 602 return 0; 603 } else { 604 return ENOMEM; 605 } 606 } 607 608 static int 609 agp_deallocate_user(device_t dev, int id) 610 { 611 struct agp_memory *mem = agp_find_memory(dev, id);; 612 613 if (mem) { 614 AGP_FREE_MEMORY(dev, mem); 615 return 0; 616 } else { 617 return ENOENT; 618 } 619 } 620 621 static int 622 agp_bind_user(device_t dev, agp_bind *bind) 623 { 624 struct agp_memory *mem = agp_find_memory(dev, bind->key); 625 626 if (!mem) 627 return ENOENT; 628 629 return AGP_BIND_MEMORY(dev, mem, bind->pg_start << AGP_PAGE_SHIFT); 630 } 631 632 static int 633 agp_unbind_user(device_t dev, agp_unbind *unbind) 634 { 635 struct agp_memory *mem = agp_find_memory(dev, unbind->key); 636 637 if (!mem) 638 return ENOENT; 639 640 return AGP_UNBIND_MEMORY(dev, mem); 641 } 642 643 static int 644 agp_open(dev_t kdev, int oflags, int devtype, struct thread *td) 645 { 646 device_t dev = KDEV2DEV(kdev); 647 struct agp_softc *sc = device_get_softc(dev); 648 649 if (!sc->as_isopen) { 650 sc->as_isopen = 1; 651 device_busy(dev); 652 } 653 654 return 0; 655 } 656 657 static int 658 agp_close(dev_t kdev, int fflag, int devtype, struct thread *td) 659 { 660 device_t dev = KDEV2DEV(kdev); 661 struct agp_softc *sc = device_get_softc(dev); 662 struct agp_memory *mem; 663 664 /* 665 * Clear the GATT and force release on last close 666 */ 667 while ((mem = TAILQ_FIRST(&sc->as_memory)) != 0) { 668 if (mem->am_is_bound) 669 AGP_UNBIND_MEMORY(dev, mem); 670 AGP_FREE_MEMORY(dev, mem); 671 } 672 if (sc->as_state == AGP_ACQUIRE_USER) 673 agp_release_helper(dev, AGP_ACQUIRE_USER); 674 sc->as_isopen = 0; 675 device_unbusy(dev); 676 677 return 0; 678 } 679 680 static int 681 agp_ioctl(dev_t kdev, u_long cmd, caddr_t data, int fflag, struct thread *td) 682 { 683 device_t dev = KDEV2DEV(kdev); 684 685 switch (cmd) { 686 case AGPIOC_INFO: 687 return agp_info_user(dev, (agp_info *) data); 688 689 case AGPIOC_ACQUIRE: 690 return agp_acquire_helper(dev, AGP_ACQUIRE_USER); 691 692 case AGPIOC_RELEASE: 693 return agp_release_helper(dev, AGP_ACQUIRE_USER); 694 695 case AGPIOC_SETUP: 696 return agp_setup_user(dev, (agp_setup *)data); 697 698 case AGPIOC_ALLOCATE: 699 return agp_allocate_user(dev, (agp_allocate *)data); 700 701 case AGPIOC_DEALLOCATE: 702 return agp_deallocate_user(dev, *(int *) data); 703 704 case AGPIOC_BIND: 705 return agp_bind_user(dev, (agp_bind *)data); 706 707 case AGPIOC_UNBIND: 708 return agp_unbind_user(dev, (agp_unbind *)data); 709 710 } 711 712 return EINVAL; 713 } 714 715 static int 716 agp_mmap(dev_t kdev, vm_offset_t offset, int prot) 717 { 718 device_t dev = KDEV2DEV(kdev); 719 struct agp_softc *sc = device_get_softc(dev); 720 721 if (offset > AGP_GET_APERTURE(dev)) 722 return -1; 723 return atop(rman_get_start(sc->as_aperture) + offset); 724 } 725 726 /* Implementation of the kernel api */ 727 728 device_t 729 agp_find_device() 730 { 731 if (!agp_devclass) 732 return 0; 733 return devclass_get_device(agp_devclass, 0); 734 } 735 736 enum agp_acquire_state 737 agp_state(device_t dev) 738 { 739 struct agp_softc *sc = device_get_softc(dev); 740 return sc->as_state; 741 } 742 743 void 744 agp_get_info(device_t dev, struct agp_info *info) 745 { 746 struct agp_softc *sc = device_get_softc(dev); 747 748 info->ai_mode = 749 pci_read_config(dev, agp_find_caps(dev) + AGP_STATUS, 4); 750 info->ai_aperture_base = rman_get_start(sc->as_aperture); 751 info->ai_aperture_size = rman_get_size(sc->as_aperture); 752 info->ai_aperture_va = (vm_offset_t) rman_get_virtual(sc->as_aperture); 753 info->ai_memory_allowed = sc->as_maxmem; 754 info->ai_memory_used = sc->as_allocated; 755 } 756 757 int 758 agp_acquire(device_t dev) 759 { 760 return agp_acquire_helper(dev, AGP_ACQUIRE_KERNEL); 761 } 762 763 int 764 agp_release(device_t dev) 765 { 766 return agp_release_helper(dev, AGP_ACQUIRE_KERNEL); 767 } 768 769 int 770 agp_enable(device_t dev, u_int32_t mode) 771 { 772 return AGP_ENABLE(dev, mode); 773 } 774 775 void *agp_alloc_memory(device_t dev, int type, vm_size_t bytes) 776 { 777 return (void *) AGP_ALLOC_MEMORY(dev, type, bytes); 778 } 779 780 void agp_free_memory(device_t dev, void *handle) 781 { 782 struct agp_memory *mem = (struct agp_memory *) handle; 783 AGP_FREE_MEMORY(dev, mem); 784 } 785 786 int agp_bind_memory(device_t dev, void *handle, vm_offset_t offset) 787 { 788 struct agp_memory *mem = (struct agp_memory *) handle; 789 return AGP_BIND_MEMORY(dev, mem, offset); 790 } 791 792 int agp_unbind_memory(device_t dev, void *handle) 793 { 794 struct agp_memory *mem = (struct agp_memory *) handle; 795 return AGP_UNBIND_MEMORY(dev, mem); 796 } 797 798 void agp_memory_info(device_t dev, void *handle, struct 799 agp_memory_info *mi) 800 { 801 struct agp_memory *mem = (struct agp_memory *) handle; 802 803 mi->ami_size = mem->am_size; 804 mi->ami_physical = mem->am_physical; 805 mi->ami_offset = mem->am_offset; 806 mi->ami_is_bound = mem->am_is_bound; 807 } 808