agp.c revision 1.3
1 /* $NetBSD: agp.c,v 1.3 2001/09/13 16:14:16 drochner 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_i810_bridgematch(pa)) 122 return agp_i810_match(parent, match, pa); 123 return agp_intel_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 if (agp_i810_bridgematch(pa)) 192 ret = agp_i810_attach(parent, self, pa); 193 else 194 ret = agp_intel_attach(parent, self, pa); 195 break; 196 case PCI_VENDOR_SIS: 197 ret = agp_sis_attach(parent, self, pa); 198 break; 199 case PCI_VENDOR_VIATECH: 200 ret = agp_via_attach(parent, self, pa); 201 break; 202 default: 203 panic("agpattach: bad chipset detection"); 204 } 205 if (ret == 0) 206 printf(": aperture at 0x%lx, size 0x%lx\n", 207 (unsigned long)sc->as_apaddr, 208 (unsigned long)AGP_GET_APERTURE(sc)); 209 else 210 sc->as_chipc = NULL; 211 } 212 int 213 agp_map_aperture(struct pci_attach_args *pa, struct agp_softc *sc) 214 { 215 /* 216 * Find and map the aperture. 217 */ 218 if (pci_mapreg_map(pa, AGP_APBASE, PCI_MAPREG_TYPE_MEM, 219 BUS_SPACE_MAP_LINEAR, 220 &sc->as_apt, &sc->as_aph, &sc->as_apaddr, &sc->as_apsize) != 0) { 221 printf("%s: can't map aperture space\n", sc->as_dev.dv_xname); 222 return ENXIO; 223 } 224 return 0; 225 } 226 227 struct agp_gatt * 228 agp_alloc_gatt(struct agp_softc *sc) 229 { 230 u_int32_t apsize = AGP_GET_APERTURE(sc); 231 u_int32_t entries = apsize >> AGP_PAGE_SHIFT; 232 struct agp_gatt *gatt; 233 int dummyseg; 234 235 gatt = malloc(sizeof(struct agp_gatt), M_AGP, M_NOWAIT); 236 if (!gatt) 237 return NULL; 238 gatt->ag_entries = entries; 239 240 if (agp_alloc_dmamem(sc->as_dmat, entries * sizeof(u_int32_t), 241 0, &gatt->ag_dmamap, (caddr_t *)&gatt->ag_virtual, 242 &gatt->ag_physical, &gatt->ag_dmaseg, 1, &dummyseg) != 0) 243 return NULL; 244 245 gatt->ag_size = entries * sizeof(u_int32_t); 246 memset(gatt->ag_virtual, 0, gatt->ag_size); 247 agp_flush_cache(); 248 249 return gatt; 250 } 251 252 void 253 agp_free_gatt(struct agp_softc *sc, struct agp_gatt *gatt) 254 { 255 agp_free_dmamem(sc->as_dmat, gatt->ag_size, gatt->ag_dmamap, 256 (caddr_t)gatt->ag_virtual, &gatt->ag_dmaseg, 1); 257 free(gatt, M_AGP); 258 } 259 260 261 int 262 agp_generic_detach(struct agp_softc *sc) 263 { 264 lockmgr(&sc->as_lock, LK_DRAIN, 0); 265 agp_flush_cache(); 266 return 0; 267 } 268 269 static int 270 agpdev_match(struct pci_attach_args *pa) 271 { 272 if (PCI_CLASS(pa->pa_class) == PCI_CLASS_DISPLAY && 273 PCI_SUBCLASS(pa->pa_class) == PCI_SUBCLASS_DISPLAY_VGA) 274 return 1; 275 276 return 0; 277 } 278 279 int 280 agp_generic_enable(struct agp_softc *sc, u_int32_t mode) 281 { 282 struct pci_attach_args pa; 283 pcireg_t tstatus, mstatus; 284 pcireg_t command; 285 int rq, sba, fw, rate, capoff; 286 287 if (pci_find_device(&pa, agpdev_match) == 0 || 288 pci_get_capability(pa.pa_pc, pa.pa_tag, PCI_CAP_AGP, 289 &capoff, NULL) == 0) { 290 printf("%s: can't find display\n", sc->as_dev.dv_xname); 291 return ENXIO; 292 } 293 294 tstatus = pci_conf_read(sc->as_pc, sc->as_tag, 295 sc->as_capoff + AGP_STATUS); 296 mstatus = pci_conf_read(pa.pa_pc, pa.pa_tag, 297 capoff + AGP_STATUS); 298 299 /* Set RQ to the min of mode, tstatus and mstatus */ 300 rq = AGP_MODE_GET_RQ(mode); 301 if (AGP_MODE_GET_RQ(tstatus) < rq) 302 rq = AGP_MODE_GET_RQ(tstatus); 303 if (AGP_MODE_GET_RQ(mstatus) < rq) 304 rq = AGP_MODE_GET_RQ(mstatus); 305 306 /* Set SBA if all three can deal with SBA */ 307 sba = (AGP_MODE_GET_SBA(tstatus) 308 & AGP_MODE_GET_SBA(mstatus) 309 & AGP_MODE_GET_SBA(mode)); 310 311 /* Similar for FW */ 312 fw = (AGP_MODE_GET_FW(tstatus) 313 & AGP_MODE_GET_FW(mstatus) 314 & AGP_MODE_GET_FW(mode)); 315 316 /* Figure out the max rate */ 317 rate = (AGP_MODE_GET_RATE(tstatus) 318 & AGP_MODE_GET_RATE(mstatus) 319 & AGP_MODE_GET_RATE(mode)); 320 if (rate & AGP_MODE_RATE_4x) 321 rate = AGP_MODE_RATE_4x; 322 else if (rate & AGP_MODE_RATE_2x) 323 rate = AGP_MODE_RATE_2x; 324 else 325 rate = AGP_MODE_RATE_1x; 326 327 /* Construct the new mode word and tell the hardware */ 328 command = AGP_MODE_SET_RQ(0, rq); 329 command = AGP_MODE_SET_SBA(command, sba); 330 command = AGP_MODE_SET_FW(command, fw); 331 command = AGP_MODE_SET_RATE(command, rate); 332 command = AGP_MODE_SET_AGP(command, 1); 333 pci_conf_write(sc->as_pc, sc->as_tag, 334 sc->as_capoff + AGP_COMMAND, command); 335 pci_conf_write(pa.pa_pc, pa.pa_tag, capoff + AGP_COMMAND, command); 336 337 return 0; 338 } 339 340 struct agp_memory * 341 agp_generic_alloc_memory(struct agp_softc *sc, int type, vsize_t size) 342 { 343 struct agp_memory *mem; 344 345 if ((size & (AGP_PAGE_SIZE - 1)) != 0) 346 return 0; 347 348 if (sc->as_allocated + size > sc->as_maxmem) 349 return 0; 350 351 if (type != 0) { 352 printf("agp_generic_alloc_memory: unsupported type %d\n", 353 type); 354 return 0; 355 } 356 357 mem = malloc(sizeof *mem, M_AGP, M_WAITOK); 358 if (mem == NULL) 359 return NULL; 360 361 if (bus_dmamap_create(sc->as_dmat, size, size / PAGE_SIZE + 1, 362 size, 0, BUS_DMA_NOWAIT, &mem->am_dmamap) != 0) { 363 free(mem, M_AGP); 364 return NULL; 365 } 366 367 mem->am_id = sc->as_nextid++; 368 mem->am_size = size; 369 mem->am_type = 0; 370 mem->am_physical = 0; 371 mem->am_offset = 0; 372 mem->am_is_bound = 0; 373 TAILQ_INSERT_TAIL(&sc->as_memory, mem, am_link); 374 sc->as_allocated += size; 375 376 return mem; 377 } 378 379 int 380 agp_generic_free_memory(struct agp_softc *sc, struct agp_memory *mem) 381 { 382 if (mem->am_is_bound) 383 return EBUSY; 384 385 sc->as_allocated -= mem->am_size; 386 TAILQ_REMOVE(&sc->as_memory, mem, am_link); 387 bus_dmamap_destroy(sc->as_dmat, mem->am_dmamap); 388 free(mem, M_AGP); 389 return 0; 390 } 391 392 int 393 agp_generic_bind_memory(struct agp_softc *sc, struct agp_memory *mem, 394 off_t offset) 395 { 396 off_t i, k; 397 bus_size_t done, j; 398 int error; 399 bus_dma_segment_t *segs, *seg; 400 bus_addr_t pa; 401 int contigpages, nseg; 402 403 lockmgr(&sc->as_lock, LK_EXCLUSIVE, 0); 404 405 if (mem->am_is_bound) { 406 printf("%s: memory already bound\n", sc->as_dev.dv_xname); 407 lockmgr(&sc->as_lock, LK_RELEASE, 0); 408 return EINVAL; 409 } 410 411 if (offset < 0 412 || (offset & (AGP_PAGE_SIZE - 1)) != 0 413 || offset + mem->am_size > AGP_GET_APERTURE(sc)) { 414 printf("%s: binding memory at bad offset %#lx\n", 415 sc->as_dev.dv_xname, (unsigned long) offset); 416 lockmgr(&sc->as_lock, LK_RELEASE, 0); 417 return EINVAL; 418 } 419 420 /* 421 * XXXfvdl 422 * The memory here needs to be directly accessable from the 423 * AGP video card, so it should be allocated using bus_dma. 424 * However, it need not be contiguous, since individual pages 425 * are translated using the GATT. 426 * 427 * Using a large chunk of contiguous memory may get in the way 428 * of other subsystems that may need one, so we try to be friendly 429 * and ask for allocation in chunks of a minimum of 8 pages 430 * of contiguous memory on average, falling back to 4, 2 and 1 431 * if really needed. Larger chunks are preferred, since allocating 432 * a bus_dma_segment per page would be overkill. 433 */ 434 435 for (contigpages = 8; contigpages > 0; contigpages >>= 1) { 436 nseg = (mem->am_size / (contigpages * PAGE_SIZE)) + 1; 437 segs = malloc(nseg * sizeof *segs, M_AGP, M_WAITOK); 438 if (segs == NULL) 439 return NULL; 440 if (bus_dmamem_alloc(sc->as_dmat, mem->am_size, PAGE_SIZE, 0, 441 segs, nseg, &mem->am_nseg, BUS_DMA_WAITOK) != 0) 442 continue; 443 if (bus_dmamem_map(sc->as_dmat, segs, mem->am_nseg, 444 mem->am_size, &mem->am_virtual, BUS_DMA_WAITOK) != 0) { 445 bus_dmamem_free(sc->as_dmat, segs, mem->am_nseg); 446 continue; 447 } 448 if (bus_dmamap_load(sc->as_dmat, mem->am_dmamap, 449 mem->am_virtual, mem->am_size, NULL, BUS_DMA_WAITOK) != 0) { 450 bus_dmamem_unmap(sc->as_dmat, mem->am_virtual, 451 mem->am_size); 452 bus_dmamem_free(sc->as_dmat, segs, mem->am_nseg); 453 continue; 454 } 455 mem->am_dmaseg = segs; 456 break; 457 } 458 459 if (contigpages == 0) { 460 lockmgr(&sc->as_lock, LK_RELEASE, 0); 461 return ENOMEM; 462 } 463 464 465 /* 466 * Bind the individual pages and flush the chipset's 467 * TLB. 468 */ 469 done = 0; 470 for (i = 0; i < mem->am_dmamap->dm_nsegs; i++) { 471 seg = &mem->am_dmamap->dm_segs[i]; 472 /* 473 * Install entries in the GATT, making sure that if 474 * AGP_PAGE_SIZE < PAGE_SIZE and mem->am_size is not 475 * aligned to PAGE_SIZE, we don't modify too many GATT 476 * entries. 477 */ 478 for (j = 0; j < seg->ds_len && (done + j) < mem->am_size; 479 j += AGP_PAGE_SIZE) { 480 pa = seg->ds_addr + j; 481 AGP_DPF("binding offset %#lx to pa %#lx\n", 482 (unsigned long)(offset + done + j), 483 (unsigned long)pa); 484 error = AGP_BIND_PAGE(sc, offset + done + j, pa); 485 if (error) { 486 /* 487 * Bail out. Reverse all the mappings 488 * and unwire the pages. 489 */ 490 for (k = 0; k < done + j; k += AGP_PAGE_SIZE) 491 AGP_UNBIND_PAGE(sc, offset + k); 492 493 lockmgr(&sc->as_lock, LK_RELEASE, 0); 494 return error; 495 } 496 } 497 done += seg->ds_len; 498 } 499 500 /* 501 * Flush the cpu cache since we are providing a new mapping 502 * for these pages. 503 */ 504 agp_flush_cache(); 505 506 /* 507 * Make sure the chipset gets the new mappings. 508 */ 509 AGP_FLUSH_TLB(sc); 510 511 mem->am_offset = offset; 512 mem->am_is_bound = 1; 513 514 lockmgr(&sc->as_lock, LK_RELEASE, 0); 515 516 return 0; 517 } 518 519 int 520 agp_generic_unbind_memory(struct agp_softc *sc, struct agp_memory *mem) 521 { 522 int i; 523 524 lockmgr(&sc->as_lock, LK_EXCLUSIVE, 0); 525 526 if (!mem->am_is_bound) { 527 printf("%s: memory is not bound\n", sc->as_dev.dv_xname); 528 lockmgr(&sc->as_lock, LK_RELEASE, 0); 529 return EINVAL; 530 } 531 532 533 /* 534 * Unbind the individual pages and flush the chipset's 535 * TLB. Unwire the pages so they can be swapped. 536 */ 537 for (i = 0; i < mem->am_size; i += AGP_PAGE_SIZE) 538 AGP_UNBIND_PAGE(sc, mem->am_offset + i); 539 540 agp_flush_cache(); 541 AGP_FLUSH_TLB(sc); 542 543 bus_dmamap_unload(sc->as_dmat, mem->am_dmamap); 544 bus_dmamem_unmap(sc->as_dmat, mem->am_virtual, mem->am_size); 545 bus_dmamem_free(sc->as_dmat, mem->am_dmaseg, mem->am_nseg); 546 547 free(mem->am_dmaseg, M_AGP); 548 549 mem->am_offset = 0; 550 mem->am_is_bound = 0; 551 552 lockmgr(&sc->as_lock, LK_RELEASE, 0); 553 554 return 0; 555 } 556 557 /* Helper functions for implementing user/kernel api */ 558 559 static int 560 agp_acquire_helper(struct agp_softc *sc, enum agp_acquire_state state) 561 { 562 if (sc->as_state != AGP_ACQUIRE_FREE) 563 return EBUSY; 564 sc->as_state = state; 565 566 return 0; 567 } 568 569 static int 570 agp_release_helper(struct agp_softc *sc, enum agp_acquire_state state) 571 { 572 struct agp_memory *mem; 573 574 if (sc->as_state == AGP_ACQUIRE_FREE) 575 return 0; 576 577 if (sc->as_state != state) 578 return EBUSY; 579 580 /* 581 * Clear out the aperture and free any outstanding memory blocks. 582 */ 583 while ((mem = TAILQ_FIRST(&sc->as_memory)) != 0) { 584 if (mem->am_is_bound) 585 AGP_UNBIND_MEMORY(sc, mem); 586 AGP_FREE_MEMORY(sc, mem); 587 } 588 589 sc->as_state = AGP_ACQUIRE_FREE; 590 return 0; 591 } 592 593 static struct agp_memory * 594 agp_find_memory(struct agp_softc *sc, int id) 595 { 596 struct agp_memory *mem; 597 598 AGP_DPF("searching for memory block %d\n", id); 599 TAILQ_FOREACH(mem, &sc->as_memory, am_link) { 600 AGP_DPF("considering memory block %d\n", mem->am_id); 601 if (mem->am_id == id) 602 return mem; 603 } 604 return 0; 605 } 606 607 /* Implementation of the userland ioctl api */ 608 609 static int 610 agp_info_user(struct agp_softc *sc, agp_info *info) 611 { 612 memset(info, 0, sizeof *info); 613 info->bridge_id = sc->as_id; 614 if (sc->as_capoff != 0) 615 info->agp_mode = pci_conf_read(sc->as_pc, sc->as_tag, 616 sc->as_capoff + AGP_STATUS); 617 else 618 info->agp_mode = 0; /* i810 doesn't have real AGP */ 619 info->aper_base = sc->as_apaddr; 620 info->aper_size = AGP_GET_APERTURE(sc) >> 20; 621 info->pg_total = info->pg_system = sc->as_maxmem >> AGP_PAGE_SHIFT; 622 info->pg_used = sc->as_allocated >> AGP_PAGE_SHIFT; 623 624 return 0; 625 } 626 627 static int 628 agp_setup_user(struct agp_softc *sc, agp_setup *setup) 629 { 630 return AGP_ENABLE(sc, setup->agp_mode); 631 } 632 633 static int 634 agp_allocate_user(struct agp_softc *sc, agp_allocate *alloc) 635 { 636 struct agp_memory *mem; 637 638 mem = AGP_ALLOC_MEMORY(sc, 639 alloc->type, 640 alloc->pg_count << AGP_PAGE_SHIFT); 641 if (mem) { 642 alloc->key = mem->am_id; 643 alloc->physical = mem->am_physical; 644 return 0; 645 } else { 646 return ENOMEM; 647 } 648 } 649 650 static int 651 agp_deallocate_user(struct agp_softc *sc, int id) 652 { 653 struct agp_memory *mem = agp_find_memory(sc, id); 654 655 if (mem) { 656 AGP_FREE_MEMORY(sc, mem); 657 return 0; 658 } else { 659 return ENOENT; 660 } 661 } 662 663 static int 664 agp_bind_user(struct agp_softc *sc, agp_bind *bind) 665 { 666 struct agp_memory *mem = agp_find_memory(sc, bind->key); 667 668 if (!mem) 669 return ENOENT; 670 671 return AGP_BIND_MEMORY(sc, mem, bind->pg_start << AGP_PAGE_SHIFT); 672 } 673 674 static int 675 agp_unbind_user(struct agp_softc *sc, agp_unbind *unbind) 676 { 677 struct agp_memory *mem = agp_find_memory(sc, unbind->key); 678 679 if (!mem) 680 return ENOENT; 681 682 return AGP_UNBIND_MEMORY(sc, mem); 683 } 684 685 int 686 agpopen(dev_t dev, int oflags, int devtype, struct proc *p) 687 { 688 struct agp_softc *sc = device_lookup(&agp_cd, AGPUNIT(dev)); 689 690 if (sc->as_chipc == NULL) 691 return ENXIO; 692 693 if (!sc->as_isopen) 694 sc->as_isopen = 1; 695 else 696 return EBUSY; 697 698 return 0; 699 } 700 701 int 702 agpclose(dev_t dev, int fflag, int devtype, struct proc *p) 703 { 704 struct agp_softc *sc = device_lookup(&agp_cd, AGPUNIT(dev)); 705 706 /* 707 * Clear the GATT and force release on last close 708 */ 709 if (sc->as_state == AGP_ACQUIRE_USER) 710 agp_release_helper(sc, AGP_ACQUIRE_USER); 711 sc->as_isopen = 0; 712 713 return 0; 714 } 715 716 int 717 agpioctl(dev_t dev, u_long cmd, caddr_t data, int fflag, struct proc *p) 718 { 719 struct agp_softc *sc = device_lookup(&agp_cd, AGPUNIT(dev)); 720 721 if (sc == NULL) 722 return ENODEV; 723 724 if ((fflag & FWRITE) == 0 && cmd != AGPIOC_INFO) 725 return EPERM; 726 727 switch (cmd) { 728 case AGPIOC_INFO: 729 return agp_info_user(sc, (agp_info *) data); 730 731 case AGPIOC_ACQUIRE: 732 return agp_acquire_helper(sc, AGP_ACQUIRE_USER); 733 734 case AGPIOC_RELEASE: 735 return agp_release_helper(sc, AGP_ACQUIRE_USER); 736 737 case AGPIOC_SETUP: 738 return agp_setup_user(sc, (agp_setup *)data); 739 740 case AGPIOC_ALLOCATE: 741 return agp_allocate_user(sc, (agp_allocate *)data); 742 743 case AGPIOC_DEALLOCATE: 744 return agp_deallocate_user(sc, *(int *) data); 745 746 case AGPIOC_BIND: 747 return agp_bind_user(sc, (agp_bind *)data); 748 749 case AGPIOC_UNBIND: 750 return agp_unbind_user(sc, (agp_unbind *)data); 751 752 } 753 754 return EINVAL; 755 } 756 757 paddr_t 758 agpmmap(dev_t dev, off_t offset, int prot) 759 { 760 struct agp_softc *sc = device_lookup(&agp_cd, AGPUNIT(dev)); 761 762 if (offset > AGP_GET_APERTURE(sc)) 763 return -1; 764 /* 765 * XXX can't really use bus_dmamem_mmap here. 766 */ 767 return (sc->as_apaddr + offset) / PAGE_SIZE; 768 } 769 770 /* Implementation of the kernel api */ 771 772 void * 773 agp_find_device(int unit) 774 { 775 return device_lookup(&agp_cd, unit); 776 } 777 778 enum agp_acquire_state 779 agp_state(void *devcookie) 780 { 781 struct agp_softc *sc = devcookie; 782 return sc->as_state; 783 } 784 785 void 786 agp_get_info(void *devcookie, struct agp_info *info) 787 { 788 struct agp_softc *sc = devcookie; 789 790 info->ai_mode = pci_conf_read(sc->as_pc, sc->as_tag, 791 sc->as_capoff + AGP_STATUS); 792 info->ai_aperture_base = sc->as_apaddr; 793 info->ai_aperture_size = sc->as_apsize; /* XXXfvdl inconsistent */ 794 info->ai_aperture_vaddr = bus_space_vaddr(sc->as_apt, sc->as_aph); 795 info->ai_memory_allowed = sc->as_maxmem; 796 info->ai_memory_used = sc->as_allocated; 797 } 798 799 int 800 agp_acquire(void *dev) 801 { 802 return agp_acquire_helper(dev, AGP_ACQUIRE_KERNEL); 803 } 804 805 int 806 agp_release(void *dev) 807 { 808 return agp_release_helper(dev, AGP_ACQUIRE_KERNEL); 809 } 810 811 int 812 agp_enable(void *dev, u_int32_t mode) 813 { 814 struct agp_softc *sc = dev; 815 816 return AGP_ENABLE(sc, mode); 817 } 818 819 void *agp_alloc_memory(void *dev, int type, vsize_t bytes) 820 { 821 struct agp_softc *sc = dev; 822 823 return (void *)AGP_ALLOC_MEMORY(sc, type, bytes); 824 } 825 826 void agp_free_memory(void *dev, void *handle) 827 { 828 struct agp_softc *sc = dev; 829 struct agp_memory *mem = (struct agp_memory *) handle; 830 AGP_FREE_MEMORY(sc, mem); 831 } 832 833 int agp_bind_memory(void *dev, void *handle, off_t offset) 834 { 835 struct agp_softc *sc = dev; 836 struct agp_memory *mem = (struct agp_memory *) handle; 837 838 return AGP_BIND_MEMORY(sc, mem, offset); 839 } 840 841 int agp_unbind_memory(void *dev, void *handle) 842 { 843 struct agp_softc *sc = dev; 844 struct agp_memory *mem = (struct agp_memory *) handle; 845 846 return AGP_UNBIND_MEMORY(sc, mem); 847 } 848 849 void agp_memory_info(void *dev, void *handle, struct agp_memory_info *mi) 850 { 851 struct agp_memory *mem = (struct agp_memory *) handle; 852 853 mi->ami_size = mem->am_size; 854 mi->ami_physical = mem->am_physical; 855 mi->ami_offset = mem->am_offset; 856 mi->ami_is_bound = mem->am_is_bound; 857 } 858 859 int 860 agp_alloc_dmamem(bus_dma_tag_t tag, size_t size, int flags, 861 bus_dmamap_t *mapp, caddr_t *vaddr, bus_addr_t *baddr, 862 bus_dma_segment_t *seg, int nseg, int *rseg) 863 864 { 865 int error, level = 0; 866 867 if ((error = bus_dmamem_alloc(tag, size, PAGE_SIZE, 0, 868 seg, nseg, rseg, BUS_DMA_NOWAIT)) != 0) 869 goto out; 870 level++; 871 872 if ((error = bus_dmamem_map(tag, seg, *rseg, size, vaddr, 873 BUS_DMA_NOWAIT | flags)) != 0) 874 goto out; 875 level++; 876 877 if ((error = bus_dmamap_create(tag, size, *rseg, size, 0, 878 BUS_DMA_NOWAIT, mapp)) != 0) 879 goto out; 880 level++; 881 882 if ((error = bus_dmamap_load(tag, *mapp, *vaddr, size, NULL, 883 BUS_DMA_NOWAIT)) != 0) 884 goto out; 885 886 *baddr = (*mapp)->dm_segs[0].ds_addr; 887 888 return 0; 889 out: 890 switch (level) { 891 case 3: 892 bus_dmamap_destroy(tag, *mapp); 893 /* FALLTHROUGH */ 894 case 2: 895 bus_dmamem_unmap(tag, *vaddr, size); 896 /* FALLTHROUGH */ 897 case 1: 898 bus_dmamem_free(tag, seg, *rseg); 899 break; 900 default: 901 break; 902 } 903 904 return error; 905 } 906 907 void 908 agp_free_dmamem(bus_dma_tag_t tag, size_t size, bus_dmamap_t map, 909 caddr_t vaddr, bus_dma_segment_t *seg, int nseg) 910 { 911 912 bus_dmamap_unload(tag, map); 913 bus_dmamap_destroy(tag, map); 914 bus_dmamem_unmap(tag, vaddr, size); 915 bus_dmamem_free(tag, seg, nseg); 916 } 917
Indexes created Sun Sep 21 20:09:37 GMT 2025