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