agp.c revision 1.1
1 /* $NetBSD: agp.c,v 1.1 2001/09/10 10:01:01 fvdl Exp $ */ 2 3 /*- 4 * Copyright (c) 2000 Doug Rabson 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 * 28 * $FreeBSD: src/sys/pci/agp.c,v 1.12 2001/05/19 01:28:07 alfred Exp $ 29 */ 30 31 /* 32 * Copyright (c) 2001 Wasabi Systems, Inc. 33 * All rights reserved. 34 * 35 * Written by Frank van der Linden for Wasabi Systems, Inc. 36 * 37 * Redistribution and use in source and binary forms, with or without 38 * modification, are permitted provided that the following conditions 39 * are met: 40 * 1. Redistributions of source code must retain the above copyright 41 * notice, this list of conditions and the following disclaimer. 42 * 2. Redistributions in binary form must reproduce the above copyright 43 * notice, this list of conditions and the following disclaimer in the 44 * documentation and/or other materials provided with the distribution. 45 * 3. All advertising materials mentioning features or use of this software 46 * must display the following acknowledgement: 47 * This product includes software developed for the NetBSD Project by 48 * Wasabi Systems, Inc. 49 * 4. The name of Wasabi Systems, Inc. may not be used to endorse 50 * or promote products derived from this software without specific prior 51 * written permission. 52 * 53 * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND 54 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 55 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 56 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC 57 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 58 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 59 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 60 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 61 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 62 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 63 * POSSIBILITY OF SUCH DAMAGE. 64 */ 65 66 67 #include <sys/param.h> 68 #include <sys/systm.h> 69 #include <sys/malloc.h> 70 #include <sys/kernel.h> 71 #include <sys/device.h> 72 #include <sys/conf.h> 73 #include <sys/ioctl.h> 74 #include <sys/fcntl.h> 75 #include <sys/agpio.h> 76 #include <sys/proc.h> 77 78 #include <uvm/uvm_extern.h> 79 80 #include <dev/pci/pcireg.h> 81 #include <dev/pci/pcivar.h> 82 #include <dev/pci/agpvar.h> 83 #include <dev/pci/agpreg.h> 84 #include <dev/pci/pcidevs.h> 85 86 #include <machine/bus.h> 87 88 /* Helper functions for implementing chipset mini drivers. */ 89 /* XXXfvdl get rid of this one. */ 90 91 extern struct cfdriver agp_cd; 92 cdev_decl(agp); 93 94 int agpmatch(struct device *, struct cfdata *, void *); 95 void agpattach(struct device *, struct device *, void *); 96 97 struct cfattach agp_ca = { 98 sizeof(struct agp_softc), agpmatch, agpattach 99 }; 100 101 static int agp_info_user(struct agp_softc *, agp_info *); 102 static int agp_setup_user(struct agp_softc *, agp_setup *); 103 static int agp_allocate_user(struct agp_softc *, agp_allocate *); 104 static int agp_deallocate_user(struct agp_softc *, int); 105 static int agp_bind_user(struct agp_softc *, agp_bind *); 106 static int agp_unbind_user(struct agp_softc *, agp_unbind *); 107 static int agpdev_match(struct pci_attach_args *); 108 109 int 110 agpmatch(struct device *parent, struct cfdata *match, void *aux) 111 { 112 struct agp_phcb_attach_args *apa = aux; 113 struct pci_attach_args *pa = &apa->apa_pci_args; 114 115 switch (PCI_VENDOR(pa->pa_id)) { 116 case PCI_VENDOR_ALI: 117 return agp_ali_match(parent, match, pa); 118 case PCI_VENDOR_AMD: 119 return agp_amd_match(parent, match, pa); 120 case PCI_VENDOR_INTEL: 121 if (agp_intel_match(parent, match, pa) != 0) 122 return 1; 123 return agp_i810_match(parent, match, pa); 124 case PCI_VENDOR_SIS: 125 return agp_sis_match(parent, match, pa); 126 case PCI_VENDOR_VIATECH: 127 return agp_via_match(parent, match, pa); 128 default: 129 return 0; 130 } 131 132 return (0); 133 } 134 135 static int agp_max[][2] = { 136 {0, 0}, 137 {32, 4}, 138 {64, 28}, 139 {128, 96}, 140 {256, 204}, 141 {512, 440}, 142 {1024, 942}, 143 {2048, 1920}, 144 {4096, 3932} 145 }; 146 #define agp_max_size (sizeof(agp_max) / sizeof(agp_max[0])) 147 148 void 149 agpattach(struct device *parent, struct device *self, void *aux) 150 { 151 struct agp_phcb_attach_args *apa = aux; 152 struct pci_attach_args *pa = &apa->apa_pci_args; 153 struct agp_softc *sc = (void *)self; 154 int memsize, i, ret; 155 156 157 sc->as_dmat = pa->pa_dmat; 158 sc->as_pc = pa->pa_pc; 159 sc->as_tag = pa->pa_tag; 160 sc->as_id = pa->pa_id; 161 162 /* 163 * Work out an upper bound for agp memory allocation. This 164 * uses a heurisitc table from the Linux driver. 165 */ 166 memsize = ptoa(physmem) >> 20; 167 for (i = 0; i < agp_max_size; i++) { 168 if (memsize <= agp_max[i][0]) 169 break; 170 } 171 if (i == agp_max_size) 172 i = agp_max_size - 1; 173 sc->as_maxmem = agp_max[i][1] << 20U; 174 175 /* 176 * The lock is used to prevent re-entry to 177 * agp_generic_bind_memory() since that function can sleep. 178 */ 179 lockinit(&sc->as_lock, PZERO|PCATCH, "agplk", 0, 0); 180 181 TAILQ_INIT(&sc->as_memory); 182 183 switch (PCI_VENDOR(pa->pa_id)) { 184 case PCI_VENDOR_ALI: 185 ret = agp_ali_attach(parent, self, pa); 186 break; 187 case PCI_VENDOR_AMD: 188 ret = agp_amd_attach(parent, self, pa); 189 break; 190 case PCI_VENDOR_INTEL: 191 ret = agp_intel_attach(parent, self, pa); 192 break; 193 case PCI_VENDOR_SIS: 194 ret = agp_sis_attach(parent, self, pa); 195 break; 196 case PCI_VENDOR_VIATECH: 197 ret = agp_via_attach(parent, self, pa); 198 break; 199 default: 200 panic("agpattach: bad chipset detection"); 201 } 202 if (ret == 0) 203 printf(": aperture at 0x%lx, size 0x%lx\n", 204 (unsigned long)sc->as_apaddr, 205 (unsigned long)AGP_GET_APERTURE(sc)); 206 else 207 sc->as_chipc = NULL; 208 } 209 int 210 agp_map_aperture(struct pci_attach_args *pa, struct agp_softc *sc) 211 { 212 /* 213 * Find and map the aperture. 214 */ 215 if (pci_mapreg_map(pa, AGP_APBASE, PCI_MAPREG_TYPE_MEM, 216 BUS_SPACE_MAP_LINEAR, 217 &sc->as_apt, &sc->as_aph, &sc->as_apaddr, &sc->as_apsize) != 0) { 218 printf("%s: can't map aperture space\n", sc->as_dev.dv_xname); 219 return ENXIO; 220 } 221 return 0; 222 } 223 224 struct agp_gatt * 225 agp_alloc_gatt(struct agp_softc *sc) 226 { 227 u_int32_t apsize = AGP_GET_APERTURE(sc); 228 u_int32_t entries = apsize >> AGP_PAGE_SHIFT; 229 struct agp_gatt *gatt; 230 int dummyseg; 231 232 gatt = malloc(sizeof(struct agp_gatt), M_AGP, M_NOWAIT); 233 if (!gatt) 234 return NULL; 235 gatt->ag_entries = entries; 236 237 if (agp_alloc_dmamem(sc->as_dmat, entries * sizeof(u_int32_t), 238 0, &gatt->ag_dmamap, (caddr_t *)&gatt->ag_virtual, 239 &gatt->ag_physical, &gatt->ag_dmaseg, 1, &dummyseg) != 0) 240 return NULL; 241 242 gatt->ag_size = entries * sizeof(u_int32_t); 243 memset(gatt->ag_virtual, 0, gatt->ag_size); 244 agp_flush_cache(); 245 246 return gatt; 247 } 248 249 void 250 agp_free_gatt(struct agp_softc *sc, struct agp_gatt *gatt) 251 { 252 agp_free_dmamem(sc->as_dmat, gatt->ag_size, gatt->ag_dmamap, 253 (caddr_t)gatt->ag_virtual, &gatt->ag_dmaseg, 1); 254 free(gatt, M_AGP); 255 } 256 257 258 int 259 agp_generic_detach(struct agp_softc *sc) 260 { 261 lockmgr(&sc->as_lock, LK_DRAIN, 0); 262 agp_flush_cache(); 263 return 0; 264 } 265 266 static int 267 agpdev_match(struct pci_attach_args *pa) 268 { 269 if (PCI_CLASS(pa->pa_class) == PCI_CLASS_DISPLAY && 270 PCI_SUBCLASS(pa->pa_class) == PCI_SUBCLASS_DISPLAY_VGA) 271 return 1; 272 273 return 0; 274 } 275 276 int 277 agp_generic_enable(struct agp_softc *sc, u_int32_t mode) 278 { 279 struct pci_attach_args pa; 280 pcireg_t tstatus, mstatus; 281 pcireg_t command; 282 int rq, sba, fw, rate, capoff; 283 284 if (pci_find_device(&pa, agpdev_match) == 0 || 285 pci_get_capability(pa.pa_pc, pa.pa_tag, PCI_CAP_AGP, 286 &capoff, NULL) == 0) { 287 printf("%s: can't find display\n", sc->as_dev.dv_xname); 288 return ENXIO; 289 } 290 291 tstatus = pci_conf_read(sc->as_pc, sc->as_tag, 292 sc->as_capoff + AGP_STATUS); 293 mstatus = pci_conf_read(pa.pa_pc, pa.pa_tag, 294 capoff + AGP_STATUS); 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_conf_write(sc->as_pc, sc->as_tag, 331 sc->as_capoff + AGP_COMMAND, command); 332 pci_conf_write(pa.pa_pc, pa.pa_tag, capoff + AGP_COMMAND, command); 333 334 return 0; 335 } 336 337 struct agp_memory * 338 agp_generic_alloc_memory(struct agp_softc *sc, int type, vsize_t size) 339 { 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 if (mem == NULL) 356 return NULL; 357 358 if (bus_dmamap_create(sc->as_dmat, size, 1, size, 0, BUS_DMA_NOWAIT, 359 &mem->am_dmamap) != 0) { 360 free(mem, M_AGP); 361 return NULL; 362 } 363 364 mem->am_id = sc->as_nextid++; 365 mem->am_size = size; 366 mem->am_type = 0; 367 mem->am_physical = 0; 368 mem->am_offset = 0; 369 mem->am_is_bound = 0; 370 TAILQ_INSERT_TAIL(&sc->as_memory, mem, am_link); 371 sc->as_allocated += size; 372 373 return mem; 374 } 375 376 int 377 agp_generic_free_memory(struct agp_softc *sc, struct agp_memory *mem) 378 { 379 if (mem->am_is_bound) 380 return EBUSY; 381 382 sc->as_allocated -= mem->am_size; 383 TAILQ_REMOVE(&sc->as_memory, mem, am_link); 384 bus_dmamap_destroy(sc->as_dmat, mem->am_dmamap); 385 free(mem, M_AGP); 386 return 0; 387 } 388 389 int 390 agp_generic_bind_memory(struct agp_softc *sc, struct agp_memory *mem, 391 off_t offset) 392 { 393 off_t i, k; 394 bus_size_t done, j; 395 int error; 396 bus_dma_segment_t *segs, *seg; 397 bus_addr_t pa; 398 int contigpages, nseg; 399 400 lockmgr(&sc->as_lock, LK_EXCLUSIVE, 0); 401 402 if (mem->am_is_bound) { 403 printf("%s: memory already bound\n", sc->as_dev.dv_xname); 404 lockmgr(&sc->as_lock, LK_RELEASE, 0); 405 return EINVAL; 406 } 407 408 if (offset < 0 409 || (offset & (AGP_PAGE_SIZE - 1)) != 0 410 || offset + mem->am_size > AGP_GET_APERTURE(sc)) { 411 printf("%s: binding memory at bad offset %#lx\n", 412 sc->as_dev.dv_xname, (unsigned long) offset); 413 lockmgr(&sc->as_lock, LK_RELEASE, 0); 414 return EINVAL; 415 } 416 417 /* 418 * XXXfvdl 419 * The memory here needs to be directly accessable from the 420 * AGP video card, so it should be allocated using bus_dma. 421 * However, it need not be contiguous, since individual pages 422 * are translated using the GATT. 423 * 424 * Using a large chunk of contiguous memory may get in the way 425 * of other subsystems that may need one, so we try to be friendly 426 * and ask for allocation in chunks of a minimum of 8 pages 427 * of contiguous memory on average, falling back to 4, 2 and 1 428 * if really needed. Larger chunks are preferred, since allocating 429 * a bus_dma_segment per page would be overkill. 430 */ 431 432 for (contigpages = 8; contigpages > 0; contigpages >>= 1) { 433 nseg = (mem->am_size / (contigpages * PAGE_SIZE)) + 1; 434 segs = malloc(sizeof *segs, M_AGP, M_WAITOK); 435 if (segs == NULL) 436 return NULL; 437 if (bus_dmamem_alloc(sc->as_dmat, mem->am_size, PAGE_SIZE, 0, 438 segs, nseg, &mem->am_nseg, BUS_DMA_WAITOK) != 0) 439 continue; 440 if (bus_dmamem_map(sc->as_dmat, segs, mem->am_nseg, 441 mem->am_size, &mem->am_virtual, BUS_DMA_WAITOK) != 0) { 442 bus_dmamem_free(sc->as_dmat, segs, mem->am_nseg); 443 continue; 444 } 445 if (bus_dmamap_load(sc->as_dmat, mem->am_dmamap, 446 mem->am_virtual, mem->am_size, NULL, BUS_DMA_WAITOK) != 0) { 447 bus_dmamem_unmap(sc->as_dmat, mem->am_virtual, 448 mem->am_size); 449 bus_dmamem_free(sc->as_dmat, segs, mem->am_nseg); 450 continue; 451 } 452 mem->am_dmaseg = segs; 453 break; 454 } 455 456 if (contigpages == 0) { 457 lockmgr(&sc->as_lock, LK_RELEASE, 0); 458 return ENOMEM; 459 } 460 461 462 /* 463 * Bind the individual pages and flush the chipset's 464 * TLB. 465 */ 466 done = 0; 467 for (i = 0; i < mem->am_dmamap->dm_nsegs; i++) { 468 seg = &mem->am_dmamap->dm_segs[i]; 469 /* 470 * Install entries in the GATT, making sure that if 471 * AGP_PAGE_SIZE < PAGE_SIZE and mem->am_size is not 472 * aligned to PAGE_SIZE, we don't modify too many GATT 473 * entries. 474 */ 475 for (j = 0; j < seg->ds_len && (done + j) < mem->am_size; 476 j += AGP_PAGE_SIZE) { 477 pa = seg->ds_addr + j; 478 AGP_DPF("binding offset %#x to pa %#x\n", 479 offset + done + j, pa); 480 error = AGP_BIND_PAGE(sc, offset + done + j, pa); 481 if (error) { 482 /* 483 * Bail out. Reverse all the mappings 484 * and unwire the pages. 485 */ 486 for (k = 0; k < done + j; k += AGP_PAGE_SIZE) 487 AGP_UNBIND_PAGE(sc, offset + k); 488 489 lockmgr(&sc->as_lock, LK_RELEASE, 0); 490 return error; 491 } 492 } 493 done += seg->ds_len; 494 } 495 496 /* 497 * Flush the cpu cache since we are providing a new mapping 498 * for these pages. 499 */ 500 agp_flush_cache(); 501 502 /* 503 * Make sure the chipset gets the new mappings. 504 */ 505 AGP_FLUSH_TLB(sc); 506 507 mem->am_offset = offset; 508 mem->am_is_bound = 1; 509 510 lockmgr(&sc->as_lock, LK_RELEASE, 0); 511 512 return 0; 513 } 514 515 int 516 agp_generic_unbind_memory(struct agp_softc *sc, struct agp_memory *mem) 517 { 518 int i; 519 520 lockmgr(&sc->as_lock, LK_EXCLUSIVE, 0); 521 522 if (!mem->am_is_bound) { 523 printf("%s: memory is not bound\n", sc->as_dev.dv_xname); 524 lockmgr(&sc->as_lock, LK_RELEASE, 0); 525 return EINVAL; 526 } 527 528 529 /* 530 * Unbind the individual pages and flush the chipset's 531 * TLB. Unwire the pages so they can be swapped. 532 */ 533 for (i = 0; i < mem->am_size; i += AGP_PAGE_SIZE) 534 AGP_UNBIND_PAGE(sc, mem->am_offset + i); 535 536 agp_flush_cache(); 537 AGP_FLUSH_TLB(sc); 538 539 bus_dmamap_unload(sc->as_dmat, mem->am_dmamap); 540 bus_dmamem_unmap(sc->as_dmat, mem->am_virtual, mem->am_size); 541 bus_dmamem_free(sc->as_dmat, mem->am_dmaseg, mem->am_nseg); 542 543 free(mem->am_dmaseg, M_AGP); 544 545 mem->am_offset = 0; 546 mem->am_is_bound = 0; 547 548 lockmgr(&sc->as_lock, LK_RELEASE, 0); 549 550 return 0; 551 } 552 553 /* Helper functions for implementing user/kernel api */ 554 555 static int 556 agp_acquire_helper(struct agp_softc *sc, enum agp_acquire_state state) 557 { 558 if (sc->as_state != AGP_ACQUIRE_FREE) 559 return EBUSY; 560 sc->as_state = state; 561 562 return 0; 563 } 564 565 static int 566 agp_release_helper(struct agp_softc *sc, enum agp_acquire_state state) 567 { 568 struct agp_memory *mem; 569 570 if (sc->as_state == AGP_ACQUIRE_FREE) 571 return 0; 572 573 if (sc->as_state != state) 574 return EBUSY; 575 576 /* 577 * Clear out the aperture and free any outstanding memory blocks. 578 */ 579 while ((mem = TAILQ_FIRST(&sc->as_memory)) != 0) { 580 if (mem->am_is_bound) 581 AGP_UNBIND_MEMORY(sc, mem); 582 AGP_FREE_MEMORY(sc, mem); 583 } 584 585 sc->as_state = AGP_ACQUIRE_FREE; 586 return 0; 587 } 588 589 static struct agp_memory * 590 agp_find_memory(struct agp_softc *sc, int id) 591 { 592 struct agp_memory *mem; 593 594 AGP_DPF("searching for memory block %d\n", id); 595 TAILQ_FOREACH(mem, &sc->as_memory, am_link) { 596 AGP_DPF("considering memory block %d\n", mem->am_id); 597 if (mem->am_id == id) 598 return mem; 599 } 600 return 0; 601 } 602 603 /* Implementation of the userland ioctl api */ 604 605 static int 606 agp_info_user(struct agp_softc *sc, agp_info *info) 607 { 608 memset(info, 0, sizeof *info); 609 info->bridge_id = sc->as_id; 610 info->agp_mode = pci_conf_read(sc->as_pc, sc->as_tag, 611 sc->as_capoff + AGP_STATUS); 612 info->aper_base = sc->as_apaddr; 613 info->aper_size = AGP_GET_APERTURE(sc) >> 20; 614 info->pg_total = info->pg_system = sc->as_maxmem >> AGP_PAGE_SHIFT; 615 info->pg_used = sc->as_allocated >> AGP_PAGE_SHIFT; 616 617 return 0; 618 } 619 620 static int 621 agp_setup_user(struct agp_softc *sc, agp_setup *setup) 622 { 623 return AGP_ENABLE(sc, setup->agp_mode); 624 } 625 626 static int 627 agp_allocate_user(struct agp_softc *sc, agp_allocate *alloc) 628 { 629 struct agp_memory *mem; 630 631 mem = AGP_ALLOC_MEMORY(sc, 632 alloc->type, 633 alloc->pg_count << AGP_PAGE_SHIFT); 634 if (mem) { 635 alloc->key = mem->am_id; 636 alloc->physical = mem->am_physical; 637 return 0; 638 } else { 639 return ENOMEM; 640 } 641 } 642 643 static int 644 agp_deallocate_user(struct agp_softc *sc, int id) 645 { 646 struct agp_memory *mem = agp_find_memory(sc, id); 647 648 if (mem) { 649 AGP_FREE_MEMORY(sc, mem); 650 return 0; 651 } else { 652 return ENOENT; 653 } 654 } 655 656 static int 657 agp_bind_user(struct agp_softc *sc, agp_bind *bind) 658 { 659 struct agp_memory *mem = agp_find_memory(sc, bind->key); 660 661 if (!mem) 662 return ENOENT; 663 664 return AGP_BIND_MEMORY(sc, mem, bind->pg_start << AGP_PAGE_SHIFT); 665 } 666 667 static int 668 agp_unbind_user(struct agp_softc *sc, agp_unbind *unbind) 669 { 670 struct agp_memory *mem = agp_find_memory(sc, unbind->key); 671 672 if (!mem) 673 return ENOENT; 674 675 return AGP_UNBIND_MEMORY(sc, mem); 676 } 677 678 int 679 agpopen(dev_t dev, int oflags, int devtype, struct proc *p) 680 { 681 struct agp_softc *sc = device_lookup(&agp_cd, AGPUNIT(dev)); 682 683 if (sc->as_chipc == NULL) 684 return ENXIO; 685 686 if (!sc->as_isopen) 687 sc->as_isopen = 1; 688 else 689 return EBUSY; 690 691 return 0; 692 } 693 694 int 695 agpclose(dev_t dev, int fflag, int devtype, struct proc *p) 696 { 697 struct agp_softc *sc = device_lookup(&agp_cd, AGPUNIT(dev)); 698 699 /* 700 * Clear the GATT and force release on last close 701 */ 702 if (sc->as_state == AGP_ACQUIRE_USER) 703 agp_release_helper(sc, AGP_ACQUIRE_USER); 704 sc->as_isopen = 0; 705 706 return 0; 707 } 708 709 int 710 agpioctl(dev_t dev, u_long cmd, caddr_t data, int fflag, struct proc *p) 711 { 712 struct agp_softc *sc = device_lookup(&agp_cd, AGPUNIT(dev)); 713 714 if (sc == NULL) 715 return ENODEV; 716 717 if ((fflag & FWRITE) == 0 && cmd != AGPIOC_INFO) 718 return EPERM; 719 720 switch (cmd) { 721 case AGPIOC_INFO: 722 return agp_info_user(sc, (agp_info *) data); 723 724 case AGPIOC_ACQUIRE: 725 return agp_acquire_helper(sc, AGP_ACQUIRE_USER); 726 727 case AGPIOC_RELEASE: 728 return agp_release_helper(sc, AGP_ACQUIRE_USER); 729 730 case AGPIOC_SETUP: 731 return agp_setup_user(sc, (agp_setup *)data); 732 733 case AGPIOC_ALLOCATE: 734 return agp_allocate_user(sc, (agp_allocate *)data); 735 736 case AGPIOC_DEALLOCATE: 737 return agp_deallocate_user(sc, *(int *) data); 738 739 case AGPIOC_BIND: 740 return agp_bind_user(sc, (agp_bind *)data); 741 742 case AGPIOC_UNBIND: 743 return agp_unbind_user(sc, (agp_unbind *)data); 744 745 } 746 747 return EINVAL; 748 } 749 750 paddr_t 751 agpmmap(dev_t dev, off_t offset, int prot) 752 { 753 struct agp_softc *sc = device_lookup(&agp_cd, AGPUNIT(dev)); 754 755 if (offset > AGP_GET_APERTURE(sc)) 756 return -1; 757 /* 758 * XXX can't really use bus_dmamem_mmap here. 759 */ 760 return (sc->as_apaddr + offset) / PAGE_SIZE; 761 } 762 763 /* Implementation of the kernel api */ 764 765 void * 766 agp_find_device(int unit) 767 { 768 return device_lookup(&agp_cd, unit); 769 } 770 771 enum agp_acquire_state 772 agp_state(void *devcookie) 773 { 774 struct agp_softc *sc = devcookie; 775 return sc->as_state; 776 } 777 778 void 779 agp_get_info(void *devcookie, struct agp_info *info) 780 { 781 struct agp_softc *sc = devcookie; 782 783 info->ai_mode = pci_conf_read(sc->as_pc, sc->as_tag, 784 sc->as_capoff + AGP_STATUS); 785 info->ai_aperture_base = sc->as_apaddr; 786 info->ai_aperture_size = sc->as_apsize; /* XXXfvdl inconsistent */ 787 info->ai_aperture_vaddr = bus_space_vaddr(sc->as_apt, sc->as_aph); 788 info->ai_memory_allowed = sc->as_maxmem; 789 info->ai_memory_used = sc->as_allocated; 790 } 791 792 int 793 agp_acquire(void *dev) 794 { 795 return agp_acquire_helper(dev, AGP_ACQUIRE_KERNEL); 796 } 797 798 int 799 agp_release(void *dev) 800 { 801 return agp_release_helper(dev, AGP_ACQUIRE_KERNEL); 802 } 803 804 int 805 agp_enable(void *dev, u_int32_t mode) 806 { 807 struct agp_softc *sc = dev; 808 809 return AGP_ENABLE(sc, mode); 810 } 811 812 void *agp_alloc_memory(void *dev, int type, vsize_t bytes) 813 { 814 struct agp_softc *sc = dev; 815 816 return (void *)AGP_ALLOC_MEMORY(sc, type, bytes); 817 } 818 819 void agp_free_memory(void *dev, void *handle) 820 { 821 struct agp_softc *sc = dev; 822 struct agp_memory *mem = (struct agp_memory *) handle; 823 AGP_FREE_MEMORY(sc, mem); 824 } 825 826 int agp_bind_memory(void *dev, void *handle, off_t offset) 827 { 828 struct agp_softc *sc = dev; 829 struct agp_memory *mem = (struct agp_memory *) handle; 830 831 return AGP_BIND_MEMORY(sc, mem, offset); 832 } 833 834 int agp_unbind_memory(void *dev, void *handle) 835 { 836 struct agp_softc *sc = dev; 837 struct agp_memory *mem = (struct agp_memory *) handle; 838 839 return AGP_UNBIND_MEMORY(sc, mem); 840 } 841 842 void agp_memory_info(void *dev, void *handle, struct agp_memory_info *mi) 843 { 844 struct agp_memory *mem = (struct agp_memory *) handle; 845 846 mi->ami_size = mem->am_size; 847 mi->ami_physical = mem->am_physical; 848 mi->ami_offset = mem->am_offset; 849 mi->ami_is_bound = mem->am_is_bound; 850 } 851 852 int 853 agp_alloc_dmamem(bus_dma_tag_t tag, size_t size, int flags, 854 bus_dmamap_t *mapp, caddr_t *vaddr, bus_addr_t *baddr, 855 bus_dma_segment_t *seg, int nseg, int *rseg) 856 857 { 858 int error, level = 0; 859 860 if ((error = bus_dmamem_alloc(tag, size, PAGE_SIZE, 0, 861 seg, nseg, rseg, BUS_DMA_NOWAIT)) != 0) 862 goto out; 863 level++; 864 865 if ((error = bus_dmamem_map(tag, seg, *rseg, size, vaddr, 866 BUS_DMA_NOWAIT | flags)) != 0) 867 goto out; 868 level++; 869 870 if ((error = bus_dmamap_create(tag, size, 1, size, 0, 871 BUS_DMA_NOWAIT, mapp)) != 0) 872 goto out; 873 level++; 874 875 if ((error = bus_dmamap_load(tag, *mapp, *vaddr, size, NULL, 876 BUS_DMA_NOWAIT)) != 0) 877 goto out; 878 879 *baddr = (*mapp)->dm_segs[0].ds_addr; 880 881 return 0; 882 out: 883 switch (level) { 884 case 3: 885 bus_dmamap_destroy(tag, *mapp); 886 /* FALLTHROUGH */ 887 case 2: 888 bus_dmamem_unmap(tag, *vaddr, size); 889 /* FALLTHROUGH */ 890 case 1: 891 bus_dmamem_free(tag, seg, *rseg); 892 break; 893 default: 894 break; 895 } 896 897 return error; 898 } 899 900 void 901 agp_free_dmamem(bus_dma_tag_t tag, size_t size, bus_dmamap_t map, 902 caddr_t vaddr, bus_dma_segment_t *seg, int nseg) 903 { 904 905 bus_dmamap_unload(tag, map); 906 bus_dmamap_destroy(tag, map); 907 bus_dmamem_unmap(tag, vaddr, size); 908 bus_dmamem_free(tag, seg, nseg); 909 } 910
Indexes created Tue Oct 14 01:09:49 GMT 2025