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: src/sys/pci/agp.c,v 1.3.2.4 2002/08/11 19:58:12 alc Exp $ 27 * $DragonFly: src/sys/dev/agp/agp.c,v 1.7 2003/08/07 21:16:48 dillon Exp $ 28 */ 29 30 #include "opt_bus.h" 31 #include "opt_pci.h" 32 33 #include <sys/param.h> 34 #include <sys/systm.h> 35 #include <sys/malloc.h> 36 #include <sys/kernel.h> 37 #include <sys/bus.h> 38 #include <sys/conf.h> 39 #include <sys/ioccom.h> 40 #include <sys/agpio.h> 41 #include <sys/lock.h> 42 #include <sys/proc.h> 43 44 #include <bus/pci/pcivar.h> 45 #include <bus/pci/pcireg.h> 46 #include "agppriv.h" 47 #include "agpvar.h" 48 #include "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 /* name */ "agp", 74 /* maj */ CDEV_MAJOR, 75 /* flags */ D_TTY, 76 /* port */ NULL, 77 /* autoq */ 0, 78 79 /* open */ agp_open, 80 /* close */ agp_close, 81 /* read */ noread, 82 /* write */ nowrite, 83 /* ioctl */ agp_ioctl, 84 /* poll */ nopoll, 85 /* mmap */ agp_mmap, 86 /* strategy */ nostrategy, 87 /* dump */ nodump, 88 /* psize */ nopsize 89 }; 90 91 static devclass_t agp_devclass; 92 #define KDEV2DEV(kdev) devclass_get_device(agp_devclass, minor(kdev)) 93 94 /* Helper functions for implementing chipset mini drivers. */ 95 96 void 97 agp_flush_cache() 98 { 99 #ifdef __i386__ 100 wbinvd(); 101 #endif 102 } 103 104 u_int8_t 105 agp_find_caps(device_t dev) 106 { 107 u_int32_t status; 108 u_int8_t ptr, next; 109 110 /* 111 * Check the CAP_LIST bit of the PCI status register first. 112 */ 113 status = pci_read_config(dev, PCIR_STATUS, 2); 114 if (!(status & 0x10)) 115 return 0; 116 117 /* 118 * Traverse the capabilities list. 119 */ 120 for (ptr = pci_read_config(dev, AGP_CAPPTR, 1); 121 ptr != 0; 122 ptr = next) { 123 u_int32_t capid = pci_read_config(dev, ptr, 4); 124 next = AGP_CAPID_GET_NEXT_PTR(capid); 125 126 /* 127 * If this capability entry ID is 2, then we are done. 128 */ 129 if (AGP_CAPID_GET_CAP_ID(capid) == 2) 130 return ptr; 131 } 132 133 return 0; 134 } 135 136 /* 137 * Find an AGP display device (if any). 138 */ 139 static device_t 140 agp_find_display(void) 141 { 142 devclass_t pci = devclass_find("pci"); 143 device_t bus, dev = 0; 144 device_t *kids; 145 int busnum, numkids, i; 146 147 for (busnum = 0; busnum < devclass_get_maxunit(pci); busnum++) { 148 bus = devclass_get_device(pci, busnum); 149 if (!bus) 150 continue; 151 device_get_children(bus, &kids, &numkids); 152 for (i = 0; i < numkids; i++) { 153 dev = kids[i]; 154 if (pci_get_class(dev) == PCIC_DISPLAY 155 && pci_get_subclass(dev) == PCIS_DISPLAY_VGA) 156 if (agp_find_caps(dev)) { 157 free(kids, M_TEMP); 158 return dev; 159 } 160 161 } 162 free(kids, M_TEMP); 163 } 164 165 return 0; 166 } 167 168 struct agp_gatt * 169 agp_alloc_gatt(device_t dev) 170 { 171 u_int32_t apsize = AGP_GET_APERTURE(dev); 172 u_int32_t entries = apsize >> AGP_PAGE_SHIFT; 173 struct agp_gatt *gatt; 174 175 if (bootverbose) 176 device_printf(dev, 177 "allocating GATT for aperture of size %dM\n", 178 apsize / (1024*1024)); 179 180 gatt = malloc(sizeof(struct agp_gatt), M_AGP, M_NOWAIT); 181 if (!gatt) 182 return 0; 183 184 gatt->ag_entries = entries; 185 gatt->ag_virtual = contigmalloc(entries * sizeof(u_int32_t), M_AGP, 0, 186 0, ~0, PAGE_SIZE, 0); 187 if (!gatt->ag_virtual) { 188 if (bootverbose) 189 device_printf(dev, "contiguous allocation failed\n"); 190 free(gatt, M_AGP); 191 return 0; 192 } 193 bzero(gatt->ag_virtual, entries * sizeof(u_int32_t)); 194 gatt->ag_physical = vtophys((vm_offset_t) gatt->ag_virtual); 195 agp_flush_cache(); 196 197 return gatt; 198 } 199 200 void 201 agp_free_gatt(struct agp_gatt *gatt) 202 { 203 contigfree(gatt->ag_virtual, 204 gatt->ag_entries * sizeof(u_int32_t), M_AGP); 205 free(gatt, M_AGP); 206 } 207 208 static int agp_max[][2] = { 209 {0, 0}, 210 {32, 4}, 211 {64, 28}, 212 {128, 96}, 213 {256, 204}, 214 {512, 440}, 215 {1024, 942}, 216 {2048, 1920}, 217 {4096, 3932} 218 }; 219 #define agp_max_size (sizeof(agp_max) / sizeof(agp_max[0])) 220 221 int 222 agp_generic_attach(device_t dev) 223 { 224 struct agp_softc *sc = device_get_softc(dev); 225 int rid, memsize, i; 226 227 /* 228 * Find and map the aperture. 229 */ 230 rid = AGP_APBASE; 231 sc->as_aperture = bus_alloc_resource(dev, SYS_RES_MEMORY, &rid, 232 0, ~0, 1, RF_ACTIVE); 233 if (!sc->as_aperture) 234 return ENOMEM; 235 236 /* 237 * Work out an upper bound for agp memory allocation. This 238 * uses a heurisitc table from the Linux driver. 239 */ 240 memsize = ptoa(Maxmem) >> 20; 241 for (i = 0; i < agp_max_size; i++) { 242 if (memsize <= agp_max[i][0]) 243 break; 244 } 245 if (i == agp_max_size) i = agp_max_size - 1; 246 sc->as_maxmem = agp_max[i][1] << 20U; 247 248 /* 249 * The lock is used to prevent re-entry to 250 * agp_generic_bind_memory() since that function can sleep. 251 */ 252 lockinit(&sc->as_lock, PCATCH, "agplk", 0, 0); 253 254 /* 255 * Initialise stuff for the userland device. 256 */ 257 agp_devclass = devclass_find("agp"); 258 TAILQ_INIT(&sc->as_memory); 259 sc->as_nextid = 1; 260 261 sc->as_devnode = make_dev(&agp_cdevsw, 262 device_get_unit(dev), 263 UID_ROOT, 264 GID_WHEEL, 265 0600, 266 "agpgart"); 267 268 return 0; 269 } 270 271 int 272 agp_generic_detach(device_t dev) 273 { 274 struct agp_softc *sc = device_get_softc(dev); 275 bus_release_resource(dev, SYS_RES_MEMORY, AGP_APBASE, sc->as_aperture); 276 lockmgr(&sc->as_lock, LK_DRAIN, 0, curthread); /* XXX */ 277 destroy_dev(sc->as_devnode); 278 agp_flush_cache(); 279 return 0; 280 } 281 282 int 283 agp_generic_enable(device_t dev, u_int32_t mode) 284 { 285 device_t mdev = agp_find_display(); 286 u_int32_t tstatus, mstatus; 287 u_int32_t command; 288 int rq, sba, fw, rate;; 289 290 if (!mdev) { 291 AGP_DPF("can't find display\n"); 292 return ENXIO; 293 } 294 295 tstatus = pci_read_config(dev, agp_find_caps(dev) + AGP_STATUS, 4); 296 mstatus = pci_read_config(mdev, agp_find_caps(mdev) + AGP_STATUS, 4); 297 298 /* Set RQ to the min of mode, tstatus and mstatus */ 299 rq = AGP_MODE_GET_RQ(mode); 300 if (AGP_MODE_GET_RQ(tstatus) < rq) 301 rq = AGP_MODE_GET_RQ(tstatus); 302 if (AGP_MODE_GET_RQ(mstatus) < rq) 303 rq = AGP_MODE_GET_RQ(mstatus); 304 305 /* Set SBA if all three can deal with SBA */ 306 sba = (AGP_MODE_GET_SBA(tstatus) 307 & AGP_MODE_GET_SBA(mstatus) 308 & AGP_MODE_GET_SBA(mode)); 309 310 /* Similar for FW */ 311 fw = (AGP_MODE_GET_FW(tstatus) 312 & AGP_MODE_GET_FW(mstatus) 313 & AGP_MODE_GET_FW(mode)); 314 315 /* Figure out the max rate */ 316 rate = (AGP_MODE_GET_RATE(tstatus) 317 & AGP_MODE_GET_RATE(mstatus) 318 & AGP_MODE_GET_RATE(mode)); 319 if (rate & AGP_MODE_RATE_4x) 320 rate = AGP_MODE_RATE_4x; 321 else if (rate & AGP_MODE_RATE_2x) 322 rate = AGP_MODE_RATE_2x; 323 else 324 rate = AGP_MODE_RATE_1x; 325 326 /* Construct the new mode word and tell the hardware */ 327 command = AGP_MODE_SET_RQ(0, rq); 328 command = AGP_MODE_SET_SBA(command, sba); 329 command = AGP_MODE_SET_FW(command, fw); 330 command = AGP_MODE_SET_RATE(command, rate); 331 command = AGP_MODE_SET_AGP(command, 1); 332 pci_write_config(dev, agp_find_caps(dev) + AGP_COMMAND, command, 4); 333 pci_write_config(mdev, agp_find_caps(mdev) + AGP_COMMAND, command, 4); 334 335 return 0; 336 } 337 338 struct agp_memory * 339 agp_generic_alloc_memory(device_t dev, int type, vm_size_t size) 340 { 341 struct agp_softc *sc = device_get_softc(dev); 342 struct agp_memory *mem; 343 344 if ((size & (AGP_PAGE_SIZE - 1)) != 0) 345 return 0; 346 347 if (sc->as_allocated + size > sc->as_maxmem) 348 return 0; 349 350 if (type != 0) { 351 printf("agp_generic_alloc_memory: unsupported type %d\n", 352 type); 353 return 0; 354 } 355 356 mem = malloc(sizeof *mem, M_AGP, M_WAITOK); 357 mem->am_id = sc->as_nextid++; 358 mem->am_size = size; 359 mem->am_type = 0; 360 mem->am_obj = vm_object_allocate(OBJT_DEFAULT, atop(round_page(size))); 361 mem->am_physical = 0; 362 mem->am_offset = 0; 363 mem->am_is_bound = 0; 364 TAILQ_INSERT_TAIL(&sc->as_memory, mem, am_link); 365 sc->as_allocated += size; 366 367 return mem; 368 } 369 370 int 371 agp_generic_free_memory(device_t dev, struct agp_memory *mem) 372 { 373 struct agp_softc *sc = device_get_softc(dev); 374 375 if (mem->am_is_bound) 376 return EBUSY; 377 378 sc->as_allocated -= mem->am_size; 379 TAILQ_REMOVE(&sc->as_memory, mem, am_link); 380 vm_object_deallocate(mem->am_obj); 381 free(mem, M_AGP); 382 return 0; 383 } 384 385 int 386 agp_generic_bind_memory(device_t dev, struct agp_memory *mem, 387 vm_offset_t offset) 388 { 389 struct agp_softc *sc = device_get_softc(dev); 390 vm_offset_t i, j, k; 391 vm_page_t m; 392 int error; 393 394 lockmgr(&sc->as_lock, LK_EXCLUSIVE, 0, curthread); /* XXX */ 395 396 if (mem->am_is_bound) { 397 device_printf(dev, "memory already bound\n"); 398 return EINVAL; 399 } 400 401 if (offset < 0 402 || (offset & (AGP_PAGE_SIZE - 1)) != 0 403 || offset + mem->am_size > AGP_GET_APERTURE(dev)) { 404 device_printf(dev, "binding memory at bad offset %#x\n", 405 (int) offset); 406 return EINVAL; 407 } 408 409 /* 410 * Bind the individual pages and flush the chipset's 411 * TLB. 412 * 413 * XXX Presumably, this needs to be the pci address on alpha 414 * (i.e. use alpha_XXX_dmamap()). I don't have access to any 415 * alpha AGP hardware to check. 416 */ 417 for (i = 0; i < mem->am_size; i += PAGE_SIZE) { 418 /* 419 * Find a page from the object and wire it 420 * down. This page will be mapped using one or more 421 * entries in the GATT (assuming that PAGE_SIZE >= 422 * AGP_PAGE_SIZE. If this is the first call to bind, 423 * the pages will be allocated and zeroed. 424 */ 425 m = vm_page_grab(mem->am_obj, OFF_TO_IDX(i), 426 VM_ALLOC_ZERO | VM_ALLOC_RETRY); 427 if ((m->flags & PG_ZERO) == 0) 428 vm_page_zero_fill(m); 429 AGP_DPF("found page pa=%#x\n", VM_PAGE_TO_PHYS(m)); 430 vm_page_wire(m); 431 432 /* 433 * Install entries in the GATT, making sure that if 434 * AGP_PAGE_SIZE < PAGE_SIZE and mem->am_size is not 435 * aligned to PAGE_SIZE, we don't modify too many GATT 436 * entries. 437 */ 438 for (j = 0; j < PAGE_SIZE && i + j < mem->am_size; 439 j += AGP_PAGE_SIZE) { 440 vm_offset_t pa = VM_PAGE_TO_PHYS(m) + j; 441 AGP_DPF("binding offset %#x to pa %#x\n", 442 offset + i + j, pa); 443 error = AGP_BIND_PAGE(dev, offset + i + j, pa); 444 if (error) { 445 /* 446 * Bail out. Reverse all the mappings 447 * and unwire the pages. 448 */ 449 vm_page_wakeup(m); 450 for (k = 0; k < i + j; k += AGP_PAGE_SIZE) 451 AGP_UNBIND_PAGE(dev, offset + k); 452 for (k = 0; k <= i; k += PAGE_SIZE) { 453 m = vm_page_lookup(mem->am_obj, 454 OFF_TO_IDX(k)); 455 vm_page_unwire(m, 0); 456 } 457 lockmgr(&sc->as_lock, LK_RELEASE, 0, curthread); /* XXX */ 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); /* XXX */ 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); /* XXX */ 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_unwire(m, 0); 507 } 508 509 agp_flush_cache(); 510 AGP_FLUSH_TLB(dev); 511 512 mem->am_offset = 0; 513 mem->am_is_bound = 0; 514 515 lockmgr(&sc->as_lock, LK_RELEASE, 0, curthread); /* XXX */ 516 517 return 0; 518 } 519 520 /* Helper functions for implementing user/kernel api */ 521 522 static int 523 agp_acquire_helper(device_t dev, enum agp_acquire_state state) 524 { 525 struct agp_softc *sc = device_get_softc(dev); 526 527 if (sc->as_state != AGP_ACQUIRE_FREE) 528 return EBUSY; 529 sc->as_state = state; 530 531 return 0; 532 } 533 534 static int 535 agp_release_helper(device_t dev, enum agp_acquire_state state) 536 { 537 struct agp_softc *sc = device_get_softc(dev); 538 539 if (sc->as_state == AGP_ACQUIRE_FREE) 540 return 0; 541 542 if (sc->as_state != state) 543 return EBUSY; 544 545 sc->as_state = AGP_ACQUIRE_FREE; 546 return 0; 547 } 548 549 static struct agp_memory * 550 agp_find_memory(device_t dev, int id) 551 { 552 struct agp_softc *sc = device_get_softc(dev); 553 struct agp_memory *mem; 554 555 AGP_DPF("searching for memory block %d\n", id); 556 TAILQ_FOREACH(mem, &sc->as_memory, am_link) { 557 AGP_DPF("considering memory block %d\n", mem->am_id); 558 if (mem->am_id == id) 559 return mem; 560 } 561 return 0; 562 } 563 564 /* Implementation of the userland ioctl api */ 565 566 static int 567 agp_info_user(device_t dev, agp_info *info) 568 { 569 struct agp_softc *sc = device_get_softc(dev); 570 571 bzero(info, sizeof *info); 572 info->bridge_id = pci_get_devid(dev); 573 info->agp_mode = 574 pci_read_config(dev, agp_find_caps(dev) + AGP_STATUS, 4); 575 info->aper_base = rman_get_start(sc->as_aperture); 576 info->aper_size = AGP_GET_APERTURE(dev) >> 20; 577 info->pg_total = info->pg_system = sc->as_maxmem >> AGP_PAGE_SHIFT; 578 info->pg_used = sc->as_allocated >> AGP_PAGE_SHIFT; 579 580 return 0; 581 } 582 583 static int 584 agp_setup_user(device_t dev, agp_setup *setup) 585 { 586 return AGP_ENABLE(dev, setup->agp_mode); 587 } 588 589 static int 590 agp_allocate_user(device_t dev, agp_allocate *alloc) 591 { 592 struct agp_memory *mem; 593 594 mem = AGP_ALLOC_MEMORY(dev, 595 alloc->type, 596 alloc->pg_count << AGP_PAGE_SHIFT); 597 if (mem) { 598 alloc->key = mem->am_id; 599 alloc->physical = mem->am_physical; 600 return 0; 601 } else { 602 return ENOMEM; 603 } 604 } 605 606 static int 607 agp_deallocate_user(device_t dev, int id) 608 { 609 struct agp_memory *mem = agp_find_memory(dev, id);; 610 611 if (mem) { 612 AGP_FREE_MEMORY(dev, mem); 613 return 0; 614 } else { 615 return ENOENT; 616 } 617 } 618 619 static int 620 agp_bind_user(device_t dev, agp_bind *bind) 621 { 622 struct agp_memory *mem = agp_find_memory(dev, bind->key); 623 624 if (!mem) 625 return ENOENT; 626 627 return AGP_BIND_MEMORY(dev, mem, bind->pg_start << AGP_PAGE_SHIFT); 628 } 629 630 static int 631 agp_unbind_user(device_t dev, agp_unbind *unbind) 632 { 633 struct agp_memory *mem = agp_find_memory(dev, unbind->key); 634 635 if (!mem) 636 return ENOENT; 637 638 return AGP_UNBIND_MEMORY(dev, mem); 639 } 640 641 static int 642 agp_open(dev_t kdev, int oflags, int devtype, struct thread *td) 643 { 644 device_t dev = KDEV2DEV(kdev); 645 struct agp_softc *sc = device_get_softc(dev); 646 647 if (!sc->as_isopen) { 648 sc->as_isopen = 1; 649 device_busy(dev); 650 } 651 652 return 0; 653 } 654 655 static int 656 agp_close(dev_t kdev, int fflag, int devtype, struct thread *td) 657 { 658 device_t dev = KDEV2DEV(kdev); 659 struct agp_softc *sc = device_get_softc(dev); 660 struct agp_memory *mem; 661 662 /* 663 * Clear the GATT and force release on last close 664 */ 665 while ((mem = TAILQ_FIRST(&sc->as_memory)) != 0) { 666 if (mem->am_is_bound) 667 AGP_UNBIND_MEMORY(dev, mem); 668 AGP_FREE_MEMORY(dev, mem); 669 } 670 if (sc->as_state == AGP_ACQUIRE_USER) 671 agp_release_helper(dev, AGP_ACQUIRE_USER); 672 sc->as_isopen = 0; 673 device_unbusy(dev); 674 675 return 0; 676 } 677 678 static int 679 agp_ioctl(dev_t kdev, u_long cmd, caddr_t data, int fflag, struct thread *td) 680 { 681 device_t dev = KDEV2DEV(kdev); 682 683 switch (cmd) { 684 case AGPIOC_INFO: 685 return agp_info_user(dev, (agp_info *) data); 686 687 case AGPIOC_ACQUIRE: 688 return agp_acquire_helper(dev, AGP_ACQUIRE_USER); 689 690 case AGPIOC_RELEASE: 691 return agp_release_helper(dev, AGP_ACQUIRE_USER); 692 693 case AGPIOC_SETUP: 694 return agp_setup_user(dev, (agp_setup *)data); 695 696 case AGPIOC_ALLOCATE: 697 return agp_allocate_user(dev, (agp_allocate *)data); 698 699 case AGPIOC_DEALLOCATE: 700 return agp_deallocate_user(dev, *(int *) data); 701 702 case AGPIOC_BIND: 703 return agp_bind_user(dev, (agp_bind *)data); 704 705 case AGPIOC_UNBIND: 706 return agp_unbind_user(dev, (agp_unbind *)data); 707 708 } 709 710 return EINVAL; 711 } 712 713 static int 714 agp_mmap(dev_t kdev, vm_offset_t offset, int prot) 715 { 716 device_t dev = KDEV2DEV(kdev); 717 struct agp_softc *sc = device_get_softc(dev); 718 719 if (offset > AGP_GET_APERTURE(dev)) 720 return -1; 721 return atop(rman_get_start(sc->as_aperture) + offset); 722 } 723 724 /* Implementation of the kernel api */ 725 726 device_t 727 agp_find_device() 728 { 729 if (!agp_devclass) 730 return 0; 731 return devclass_get_device(agp_devclass, 0); 732 } 733 734 enum agp_acquire_state 735 agp_state(device_t dev) 736 { 737 struct agp_softc *sc = device_get_softc(dev); 738 return sc->as_state; 739 } 740 741 void 742 agp_get_info(device_t dev, struct agp_info *info) 743 { 744 struct agp_softc *sc = device_get_softc(dev); 745 746 info->ai_mode = 747 pci_read_config(dev, agp_find_caps(dev) + AGP_STATUS, 4); 748 info->ai_aperture_base = rman_get_start(sc->as_aperture); 749 info->ai_aperture_size = (rman_get_end(sc->as_aperture) 750 - rman_get_start(sc->as_aperture)) + 1; 751 info->ai_aperture_va = (vm_offset_t) rman_get_virtual(sc->as_aperture); 752 info->ai_memory_allowed = sc->as_maxmem; 753 info->ai_memory_used = sc->as_allocated; 754 } 755 756 int 757 agp_acquire(device_t dev) 758 { 759 return agp_acquire_helper(dev, AGP_ACQUIRE_KERNEL); 760 } 761 762 int 763 agp_release(device_t dev) 764 { 765 return agp_release_helper(dev, AGP_ACQUIRE_KERNEL); 766 } 767 768 int 769 agp_enable(device_t dev, u_int32_t mode) 770 { 771 return AGP_ENABLE(dev, mode); 772 } 773 774 void *agp_alloc_memory(device_t dev, int type, vm_size_t bytes) 775 { 776 return (void *) AGP_ALLOC_MEMORY(dev, type, bytes); 777 } 778 779 void agp_free_memory(device_t dev, void *handle) 780 { 781 struct agp_memory *mem = (struct agp_memory *) handle; 782 AGP_FREE_MEMORY(dev, mem); 783 } 784 785 int agp_bind_memory(device_t dev, void *handle, vm_offset_t offset) 786 { 787 struct agp_memory *mem = (struct agp_memory *) handle; 788 return AGP_BIND_MEMORY(dev, mem, offset); 789 } 790 791 int agp_unbind_memory(device_t dev, void *handle) 792 { 793 struct agp_memory *mem = (struct agp_memory *) handle; 794 return AGP_UNBIND_MEMORY(dev, mem); 795 } 796 797 void agp_memory_info(device_t dev, void *handle, struct 798 agp_memory_info *mi) 799 { 800 struct agp_memory *mem = (struct agp_memory *) handle; 801 802 mi->ami_size = mem->am_size; 803 mi->ami_physical = mem->am_physical; 804 mi->ami_offset = mem->am_offset; 805 mi->ami_is_bound = mem->am_is_bound; 806 } 807