agp.c revision 1.62
1 /* $NetBSD: agp.c,v 1.62 2008/10/17 17:15:09 christos 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/cdefs.h> 68 __KERNEL_RCSID(0, "$NetBSD: agp.c,v 1.62 2008/10/17 17:15:09 christos Exp $"); 69 70 #include <sys/param.h> 71 #include <sys/systm.h> 72 #include <sys/malloc.h> 73 #include <sys/kernel.h> 74 #include <sys/device.h> 75 #include <sys/conf.h> 76 #include <sys/ioctl.h> 77 #include <sys/fcntl.h> 78 #include <sys/agpio.h> 79 #include <sys/proc.h> 80 #include <sys/mutex.h> 81 82 #include <uvm/uvm_extern.h> 83 84 #include <dev/pci/pcireg.h> 85 #include <dev/pci/pcivar.h> 86 #include <dev/pci/agpvar.h> 87 #include <dev/pci/agpreg.h> 88 #include <dev/pci/pcidevs.h> 89 90 #include <sys/bus.h> 91 92 MALLOC_DEFINE(M_AGP, "AGP", "AGP memory"); 93 94 /* Helper functions for implementing chipset mini drivers. */ 95 /* XXXfvdl get rid of this one. */ 96 97 extern struct cfdriver agp_cd; 98 99 static int agp_info_user(struct agp_softc *, agp_info *); 100 static int agp_setup_user(struct agp_softc *, agp_setup *); 101 static int agp_allocate_user(struct agp_softc *, agp_allocate *); 102 static int agp_deallocate_user(struct agp_softc *, int); 103 static int agp_bind_user(struct agp_softc *, agp_bind *); 104 static int agp_unbind_user(struct agp_softc *, agp_unbind *); 105 static int agpdev_match(struct pci_attach_args *); 106 static bool agp_resume(device_t PMF_FN_PROTO); 107 108 #include "agp_ali.h" 109 #include "agp_amd.h" 110 #include "agp_i810.h" 111 #include "agp_intel.h" 112 #include "agp_sis.h" 113 #include "agp_via.h" 114 #include "agp_amd64.h" 115 116 const struct agp_product { 117 uint32_t ap_vendor; 118 uint32_t ap_product; 119 int (*ap_match)(const struct pci_attach_args *); 120 int (*ap_attach)(device_t, device_t, void *); 121 } agp_products[] = { 122 #if NAGP_AMD64 > 0 123 { PCI_VENDOR_ALI, PCI_PRODUCT_ALI_M1689, 124 agp_amd64_match, agp_amd64_attach }, 125 #endif 126 127 #if NAGP_ALI > 0 128 { PCI_VENDOR_ALI, -1, 129 NULL, agp_ali_attach }, 130 #endif 131 132 #if NAGP_AMD64 > 0 133 { PCI_VENDOR_AMD, PCI_PRODUCT_AMD_AGP8151_DEV, 134 agp_amd64_match, agp_amd64_attach }, 135 #endif 136 137 #if NAGP_AMD > 0 138 { PCI_VENDOR_AMD, -1, 139 agp_amd_match, agp_amd_attach }, 140 #endif 141 142 #if NAGP_I810 > 0 143 { PCI_VENDOR_INTEL, PCI_PRODUCT_INTEL_82810_MCH, 144 NULL, agp_i810_attach }, 145 { PCI_VENDOR_INTEL, PCI_PRODUCT_INTEL_82810_DC100_MCH, 146 NULL, agp_i810_attach }, 147 { PCI_VENDOR_INTEL, PCI_PRODUCT_INTEL_82810E_MCH, 148 NULL, agp_i810_attach }, 149 { PCI_VENDOR_INTEL, PCI_PRODUCT_INTEL_82815_FULL_HUB, 150 NULL, agp_i810_attach }, 151 { PCI_VENDOR_INTEL, PCI_PRODUCT_INTEL_82840_HB, 152 NULL, agp_i810_attach }, 153 { PCI_VENDOR_INTEL, PCI_PRODUCT_INTEL_82830MP_IO_1, 154 NULL, agp_i810_attach }, 155 { PCI_VENDOR_INTEL, PCI_PRODUCT_INTEL_82845G_DRAM, 156 NULL, agp_i810_attach }, 157 { PCI_VENDOR_INTEL, PCI_PRODUCT_INTEL_82855GM_MCH, 158 NULL, agp_i810_attach }, 159 { PCI_VENDOR_INTEL, PCI_PRODUCT_INTEL_82865_HB, 160 NULL, agp_i810_attach }, 161 { PCI_VENDOR_INTEL, PCI_PRODUCT_INTEL_82915G_HB, 162 NULL, agp_i810_attach }, 163 { PCI_VENDOR_INTEL, PCI_PRODUCT_INTEL_82915GM_HB, 164 NULL, agp_i810_attach }, 165 { PCI_VENDOR_INTEL, PCI_PRODUCT_INTEL_82945P_MCH, 166 NULL, agp_i810_attach }, 167 { PCI_VENDOR_INTEL, PCI_PRODUCT_INTEL_82945GM_HB, 168 NULL, agp_i810_attach }, 169 { PCI_VENDOR_INTEL, PCI_PRODUCT_INTEL_82945GME_HB, 170 NULL, agp_i810_attach }, 171 { PCI_VENDOR_INTEL, PCI_PRODUCT_INTEL_82965Q_HB, 172 NULL, agp_i810_attach }, 173 { PCI_VENDOR_INTEL, PCI_PRODUCT_INTEL_82965PM_HB, 174 NULL, agp_i810_attach }, 175 { PCI_VENDOR_INTEL, PCI_PRODUCT_INTEL_82965G_HB, 176 NULL, agp_i810_attach }, 177 { PCI_VENDOR_INTEL, PCI_PRODUCT_INTEL_82Q35_HB, 178 NULL, agp_i810_attach }, 179 { PCI_VENDOR_INTEL, PCI_PRODUCT_INTEL_82G33_HB, 180 NULL, agp_i810_attach }, 181 { PCI_VENDOR_INTEL, PCI_PRODUCT_INTEL_82Q33_HB, 182 NULL, agp_i810_attach }, 183 { PCI_VENDOR_INTEL, PCI_PRODUCT_INTEL_82946GZ_HB, 184 NULL, agp_i810_attach }, 185 #endif 186 187 #if NAGP_INTEL > 0 188 { PCI_VENDOR_INTEL, -1, 189 NULL, agp_intel_attach }, 190 #endif 191 192 #if NAGP_AMD64 > 0 193 { PCI_VENDOR_NVIDIA, PCI_PRODUCT_NVIDIA_NFORCE3_PCHB, 194 agp_amd64_match, agp_amd64_attach }, 195 { PCI_VENDOR_NVIDIA, PCI_PRODUCT_NVIDIA_NFORCE3_250_PCHB, 196 agp_amd64_match, agp_amd64_attach }, 197 #endif 198 199 #if NAGP_AMD64 > 0 200 { PCI_VENDOR_SIS, PCI_PRODUCT_SIS_755, 201 agp_amd64_match, agp_amd64_attach }, 202 { PCI_VENDOR_SIS, PCI_PRODUCT_SIS_760, 203 agp_amd64_match, agp_amd64_attach }, 204 #endif 205 206 #if NAGP_SIS > 0 207 { PCI_VENDOR_SIS, -1, 208 NULL, agp_sis_attach }, 209 #endif 210 211 #if NAGP_AMD64 > 0 212 { PCI_VENDOR_VIATECH, PCI_PRODUCT_VIATECH_K8M800_0, 213 agp_amd64_match, agp_amd64_attach }, 214 { PCI_VENDOR_VIATECH, PCI_PRODUCT_VIATECH_K8T890_0, 215 agp_amd64_match, agp_amd64_attach }, 216 { PCI_VENDOR_VIATECH, PCI_PRODUCT_VIATECH_K8HTB_0, 217 agp_amd64_match, agp_amd64_attach }, 218 { PCI_VENDOR_VIATECH, PCI_PRODUCT_VIATECH_K8HTB, 219 agp_amd64_match, agp_amd64_attach }, 220 #endif 221 222 #if NAGP_VIA > 0 223 { PCI_VENDOR_VIATECH, -1, 224 NULL, agp_via_attach }, 225 #endif 226 227 { 0, 0, 228 NULL, NULL }, 229 }; 230 231 static const struct agp_product * 232 agp_lookup(const struct pci_attach_args *pa) 233 { 234 const struct agp_product *ap; 235 236 /* First find the vendor. */ 237 for (ap = agp_products; ap->ap_attach != NULL; ap++) { 238 if (PCI_VENDOR(pa->pa_id) == ap->ap_vendor) 239 break; 240 } 241 242 if (ap->ap_attach == NULL) 243 return (NULL); 244 245 /* Now find the product within the vendor's domain. */ 246 for (; ap->ap_attach != NULL; ap++) { 247 if (PCI_VENDOR(pa->pa_id) != ap->ap_vendor) { 248 /* Ran out of this vendor's section of the table. */ 249 return (NULL); 250 } 251 if (ap->ap_product == PCI_PRODUCT(pa->pa_id)) { 252 /* Exact match. */ 253 break; 254 } 255 if (ap->ap_product == (uint32_t) -1) { 256 /* Wildcard match. */ 257 break; 258 } 259 } 260 261 if (ap->ap_attach == NULL) 262 return (NULL); 263 264 /* Now let the product-specific driver filter the match. */ 265 if (ap->ap_match != NULL && (*ap->ap_match)(pa) == 0) 266 return (NULL); 267 268 return (ap); 269 } 270 271 static int 272 agpmatch(device_t parent, cfdata_t match, void *aux) 273 { 274 struct agpbus_attach_args *apa = aux; 275 struct pci_attach_args *pa = &apa->apa_pci_args; 276 277 if (agp_lookup(pa) == NULL) 278 return (0); 279 280 return (1); 281 } 282 283 static const int agp_max[][2] = { 284 {0, 0}, 285 {32, 4}, 286 {64, 28}, 287 {128, 96}, 288 {256, 204}, 289 {512, 440}, 290 {1024, 942}, 291 {2048, 1920}, 292 {4096, 3932} 293 }; 294 #define agp_max_size (sizeof(agp_max) / sizeof(agp_max[0])) 295 296 static void 297 agpattach(device_t parent, device_t self, void *aux) 298 { 299 struct agpbus_attach_args *apa = aux; 300 struct pci_attach_args *pa = &apa->apa_pci_args; 301 struct agp_softc *sc = device_private(self); 302 const struct agp_product *ap; 303 int memsize, i, ret; 304 305 ap = agp_lookup(pa); 306 KASSERT(ap != NULL); 307 308 aprint_naive(": AGP controller\n"); 309 310 sc->as_dev = self; 311 sc->as_dmat = pa->pa_dmat; 312 sc->as_pc = pa->pa_pc; 313 sc->as_tag = pa->pa_tag; 314 sc->as_id = pa->pa_id; 315 316 /* 317 * Work out an upper bound for agp memory allocation. This 318 * uses a heuristic table from the Linux driver. 319 */ 320 memsize = ptoa(physmem) >> 20; 321 for (i = 0; i < agp_max_size; i++) { 322 if (memsize <= agp_max[i][0]) 323 break; 324 } 325 if (i == agp_max_size) 326 i = agp_max_size - 1; 327 sc->as_maxmem = agp_max[i][1] << 20U; 328 329 /* 330 * The mutex is used to prevent re-entry to 331 * agp_generic_bind_memory() since that function can sleep. 332 */ 333 mutex_init(&sc->as_mtx, MUTEX_DEFAULT, IPL_NONE); 334 335 TAILQ_INIT(&sc->as_memory); 336 337 ret = (*ap->ap_attach)(parent, self, pa); 338 if (ret == 0) 339 aprint_normal(": aperture at 0x%lx, size 0x%lx\n", 340 (unsigned long)sc->as_apaddr, 341 (unsigned long)AGP_GET_APERTURE(sc)); 342 else 343 sc->as_chipc = NULL; 344 345 if (!device_pmf_is_registered(self)) { 346 if (!pmf_device_register(self, NULL, agp_resume)) 347 aprint_error_dev(self, "couldn't establish power " 348 "handler\n"); 349 } 350 } 351 352 CFATTACH_DECL_NEW(agp, sizeof(struct agp_softc), 353 agpmatch, agpattach, NULL, NULL); 354 355 int 356 agp_map_aperture(struct pci_attach_args *pa, struct agp_softc *sc, int reg) 357 { 358 /* 359 * Find the aperture. Don't map it (yet), this would 360 * eat KVA. 361 */ 362 if (pci_mapreg_info(pa->pa_pc, pa->pa_tag, reg, 363 PCI_MAPREG_TYPE_MEM, &sc->as_apaddr, &sc->as_apsize, 364 &sc->as_apflags) != 0) 365 return ENXIO; 366 367 sc->as_apt = pa->pa_memt; 368 369 return 0; 370 } 371 372 struct agp_gatt * 373 agp_alloc_gatt(struct agp_softc *sc) 374 { 375 u_int32_t apsize = AGP_GET_APERTURE(sc); 376 u_int32_t entries = apsize >> AGP_PAGE_SHIFT; 377 struct agp_gatt *gatt; 378 void *virtual; 379 int dummyseg; 380 381 gatt = malloc(sizeof(struct agp_gatt), M_AGP, M_NOWAIT); 382 if (!gatt) 383 return NULL; 384 gatt->ag_entries = entries; 385 386 if (agp_alloc_dmamem(sc->as_dmat, entries * sizeof(u_int32_t), 387 0, &gatt->ag_dmamap, &virtual, &gatt->ag_physical, 388 &gatt->ag_dmaseg, 1, &dummyseg) != 0) { 389 free(gatt, M_AGP); 390 return NULL; 391 } 392 gatt->ag_virtual = (uint32_t *)virtual; 393 394 gatt->ag_size = entries * sizeof(u_int32_t); 395 memset(gatt->ag_virtual, 0, gatt->ag_size); 396 agp_flush_cache(); 397 398 return gatt; 399 } 400 401 void 402 agp_free_gatt(struct agp_softc *sc, struct agp_gatt *gatt) 403 { 404 agp_free_dmamem(sc->as_dmat, gatt->ag_size, gatt->ag_dmamap, 405 (void *)gatt->ag_virtual, &gatt->ag_dmaseg, 1); 406 free(gatt, M_AGP); 407 } 408 409 410 int 411 agp_generic_detach(struct agp_softc *sc) 412 { 413 mutex_destroy(&sc->as_mtx); 414 agp_flush_cache(); 415 return 0; 416 } 417 418 static int 419 agpdev_match(struct pci_attach_args *pa) 420 { 421 if (PCI_CLASS(pa->pa_class) == PCI_CLASS_DISPLAY && 422 PCI_SUBCLASS(pa->pa_class) == PCI_SUBCLASS_DISPLAY_VGA) 423 if (pci_get_capability(pa->pa_pc, pa->pa_tag, PCI_CAP_AGP, 424 NULL, NULL)) 425 return 1; 426 427 return 0; 428 } 429 430 int 431 agp_generic_enable(struct agp_softc *sc, u_int32_t mode) 432 { 433 struct pci_attach_args pa; 434 pcireg_t tstatus, mstatus; 435 pcireg_t command; 436 int rq, sba, fw, rate, capoff; 437 438 if (pci_find_device(&pa, agpdev_match) == 0 || 439 pci_get_capability(pa.pa_pc, pa.pa_tag, PCI_CAP_AGP, 440 &capoff, NULL) == 0) { 441 aprint_error_dev(sc->as_dev, "can't find display\n"); 442 return ENXIO; 443 } 444 445 tstatus = pci_conf_read(sc->as_pc, sc->as_tag, 446 sc->as_capoff + AGP_STATUS); 447 mstatus = pci_conf_read(pa.pa_pc, pa.pa_tag, 448 capoff + AGP_STATUS); 449 450 /* Set RQ to the min of mode, tstatus and mstatus */ 451 rq = AGP_MODE_GET_RQ(mode); 452 if (AGP_MODE_GET_RQ(tstatus) < rq) 453 rq = AGP_MODE_GET_RQ(tstatus); 454 if (AGP_MODE_GET_RQ(mstatus) < rq) 455 rq = AGP_MODE_GET_RQ(mstatus); 456 457 /* Set SBA if all three can deal with SBA */ 458 sba = (AGP_MODE_GET_SBA(tstatus) 459 & AGP_MODE_GET_SBA(mstatus) 460 & AGP_MODE_GET_SBA(mode)); 461 462 /* Similar for FW */ 463 fw = (AGP_MODE_GET_FW(tstatus) 464 & AGP_MODE_GET_FW(mstatus) 465 & AGP_MODE_GET_FW(mode)); 466 467 /* Figure out the max rate */ 468 rate = (AGP_MODE_GET_RATE(tstatus) 469 & AGP_MODE_GET_RATE(mstatus) 470 & AGP_MODE_GET_RATE(mode)); 471 if (rate & AGP_MODE_RATE_4x) 472 rate = AGP_MODE_RATE_4x; 473 else if (rate & AGP_MODE_RATE_2x) 474 rate = AGP_MODE_RATE_2x; 475 else 476 rate = AGP_MODE_RATE_1x; 477 478 /* Construct the new mode word and tell the hardware */ 479 command = AGP_MODE_SET_RQ(0, rq); 480 command = AGP_MODE_SET_SBA(command, sba); 481 command = AGP_MODE_SET_FW(command, fw); 482 command = AGP_MODE_SET_RATE(command, rate); 483 command = AGP_MODE_SET_AGP(command, 1); 484 pci_conf_write(sc->as_pc, sc->as_tag, 485 sc->as_capoff + AGP_COMMAND, command); 486 pci_conf_write(pa.pa_pc, pa.pa_tag, capoff + AGP_COMMAND, command); 487 488 return 0; 489 } 490 491 struct agp_memory * 492 agp_generic_alloc_memory(struct agp_softc *sc, int type, vsize_t size) 493 { 494 struct agp_memory *mem; 495 496 if ((size & (AGP_PAGE_SIZE - 1)) != 0) 497 return 0; 498 499 if (sc->as_allocated + size > sc->as_maxmem) 500 return 0; 501 502 if (type != 0) { 503 printf("agp_generic_alloc_memory: unsupported type %d\n", 504 type); 505 return 0; 506 } 507 508 mem = malloc(sizeof *mem, M_AGP, M_WAITOK); 509 if (mem == NULL) 510 return NULL; 511 512 if (bus_dmamap_create(sc->as_dmat, size, size / PAGE_SIZE + 1, 513 size, 0, BUS_DMA_NOWAIT, &mem->am_dmamap) != 0) { 514 free(mem, M_AGP); 515 return NULL; 516 } 517 518 mem->am_id = sc->as_nextid++; 519 mem->am_size = size; 520 mem->am_type = 0; 521 mem->am_physical = 0; 522 mem->am_offset = 0; 523 mem->am_is_bound = 0; 524 TAILQ_INSERT_TAIL(&sc->as_memory, mem, am_link); 525 sc->as_allocated += size; 526 527 return mem; 528 } 529 530 int 531 agp_generic_free_memory(struct agp_softc *sc, struct agp_memory *mem) 532 { 533 if (mem->am_is_bound) 534 return EBUSY; 535 536 sc->as_allocated -= mem->am_size; 537 TAILQ_REMOVE(&sc->as_memory, mem, am_link); 538 bus_dmamap_destroy(sc->as_dmat, mem->am_dmamap); 539 free(mem, M_AGP); 540 return 0; 541 } 542 543 int 544 agp_generic_bind_memory(struct agp_softc *sc, struct agp_memory *mem, 545 off_t offset) 546 { 547 off_t i, k; 548 bus_size_t done, j; 549 int error; 550 bus_dma_segment_t *segs, *seg; 551 bus_addr_t pa; 552 int contigpages, nseg; 553 554 mutex_enter(&sc->as_mtx); 555 556 if (mem->am_is_bound) { 557 aprint_error_dev(sc->as_dev, "memory already bound\n"); 558 mutex_exit(&sc->as_mtx); 559 return EINVAL; 560 } 561 562 if (offset < 0 563 || (offset & (AGP_PAGE_SIZE - 1)) != 0 564 || offset + mem->am_size > AGP_GET_APERTURE(sc)) { 565 aprint_error_dev(sc->as_dev, 566 "binding memory at bad offset %#lx\n", 567 (unsigned long) offset); 568 mutex_exit(&sc->as_mtx); 569 return EINVAL; 570 } 571 572 /* 573 * XXXfvdl 574 * The memory here needs to be directly accessable from the 575 * AGP video card, so it should be allocated using bus_dma. 576 * However, it need not be contiguous, since individual pages 577 * are translated using the GATT. 578 * 579 * Using a large chunk of contiguous memory may get in the way 580 * of other subsystems that may need one, so we try to be friendly 581 * and ask for allocation in chunks of a minimum of 8 pages 582 * of contiguous memory on average, falling back to 4, 2 and 1 583 * if really needed. Larger chunks are preferred, since allocating 584 * a bus_dma_segment per page would be overkill. 585 */ 586 587 for (contigpages = 8; contigpages > 0; contigpages >>= 1) { 588 nseg = (mem->am_size / (contigpages * PAGE_SIZE)) + 1; 589 segs = malloc(nseg * sizeof *segs, M_AGP, M_WAITOK); 590 if (segs == NULL) { 591 mutex_exit(&sc->as_mtx); 592 return ENOMEM; 593 } 594 if (bus_dmamem_alloc(sc->as_dmat, mem->am_size, PAGE_SIZE, 0, 595 segs, nseg, &mem->am_nseg, 596 contigpages > 1 ? 597 BUS_DMA_NOWAIT : BUS_DMA_WAITOK) != 0) { 598 free(segs, M_AGP); 599 continue; 600 } 601 if (bus_dmamem_map(sc->as_dmat, segs, mem->am_nseg, 602 mem->am_size, &mem->am_virtual, BUS_DMA_WAITOK) != 0) { 603 bus_dmamem_free(sc->as_dmat, segs, mem->am_nseg); 604 free(segs, M_AGP); 605 continue; 606 } 607 if (bus_dmamap_load(sc->as_dmat, mem->am_dmamap, 608 mem->am_virtual, mem->am_size, NULL, BUS_DMA_WAITOK) != 0) { 609 bus_dmamem_unmap(sc->as_dmat, mem->am_virtual, 610 mem->am_size); 611 bus_dmamem_free(sc->as_dmat, segs, mem->am_nseg); 612 free(segs, M_AGP); 613 continue; 614 } 615 mem->am_dmaseg = segs; 616 break; 617 } 618 619 if (contigpages == 0) { 620 mutex_exit(&sc->as_mtx); 621 return ENOMEM; 622 } 623 624 625 /* 626 * Bind the individual pages and flush the chipset's 627 * TLB. 628 */ 629 done = 0; 630 for (i = 0; i < mem->am_dmamap->dm_nsegs; i++) { 631 seg = &mem->am_dmamap->dm_segs[i]; 632 /* 633 * Install entries in the GATT, making sure that if 634 * AGP_PAGE_SIZE < PAGE_SIZE and mem->am_size is not 635 * aligned to PAGE_SIZE, we don't modify too many GATT 636 * entries. 637 */ 638 for (j = 0; j < seg->ds_len && (done + j) < mem->am_size; 639 j += AGP_PAGE_SIZE) { 640 pa = seg->ds_addr + j; 641 AGP_DPF(("binding offset %#lx to pa %#lx\n", 642 (unsigned long)(offset + done + j), 643 (unsigned long)pa)); 644 error = AGP_BIND_PAGE(sc, offset + done + j, pa); 645 if (error) { 646 /* 647 * Bail out. Reverse all the mappings 648 * and unwire the pages. 649 */ 650 for (k = 0; k < done + j; k += AGP_PAGE_SIZE) 651 AGP_UNBIND_PAGE(sc, offset + k); 652 653 bus_dmamap_unload(sc->as_dmat, mem->am_dmamap); 654 bus_dmamem_unmap(sc->as_dmat, mem->am_virtual, 655 mem->am_size); 656 bus_dmamem_free(sc->as_dmat, mem->am_dmaseg, 657 mem->am_nseg); 658 free(mem->am_dmaseg, M_AGP); 659 mutex_exit(&sc->as_mtx); 660 return error; 661 } 662 } 663 done += seg->ds_len; 664 } 665 666 /* 667 * Flush the CPU cache since we are providing a new mapping 668 * for these pages. 669 */ 670 agp_flush_cache(); 671 672 /* 673 * Make sure the chipset gets the new mappings. 674 */ 675 AGP_FLUSH_TLB(sc); 676 677 mem->am_offset = offset; 678 mem->am_is_bound = 1; 679 680 mutex_exit(&sc->as_mtx); 681 682 return 0; 683 } 684 685 int 686 agp_generic_unbind_memory(struct agp_softc *sc, struct agp_memory *mem) 687 { 688 int i; 689 690 mutex_enter(&sc->as_mtx); 691 692 if (!mem->am_is_bound) { 693 aprint_error_dev(sc->as_dev, "memory is not bound\n"); 694 mutex_exit(&sc->as_mtx); 695 return EINVAL; 696 } 697 698 699 /* 700 * Unbind the individual pages and flush the chipset's 701 * TLB. Unwire the pages so they can be swapped. 702 */ 703 for (i = 0; i < mem->am_size; i += AGP_PAGE_SIZE) 704 AGP_UNBIND_PAGE(sc, mem->am_offset + i); 705 706 agp_flush_cache(); 707 AGP_FLUSH_TLB(sc); 708 709 bus_dmamap_unload(sc->as_dmat, mem->am_dmamap); 710 bus_dmamem_unmap(sc->as_dmat, mem->am_virtual, mem->am_size); 711 bus_dmamem_free(sc->as_dmat, mem->am_dmaseg, mem->am_nseg); 712 713 free(mem->am_dmaseg, M_AGP); 714 715 mem->am_offset = 0; 716 mem->am_is_bound = 0; 717 718 mutex_exit(&sc->as_mtx); 719 720 return 0; 721 } 722 723 /* Helper functions for implementing user/kernel api */ 724 725 static int 726 agp_acquire_helper(struct agp_softc *sc, enum agp_acquire_state state) 727 { 728 if (sc->as_state != AGP_ACQUIRE_FREE) 729 return EBUSY; 730 sc->as_state = state; 731 732 return 0; 733 } 734 735 static int 736 agp_release_helper(struct agp_softc *sc, enum agp_acquire_state state) 737 { 738 739 if (sc->as_state == AGP_ACQUIRE_FREE) 740 return 0; 741 742 if (sc->as_state != state) 743 return EBUSY; 744 745 sc->as_state = AGP_ACQUIRE_FREE; 746 return 0; 747 } 748 749 static struct agp_memory * 750 agp_find_memory(struct agp_softc *sc, int id) 751 { 752 struct agp_memory *mem; 753 754 AGP_DPF(("searching for memory block %d\n", id)); 755 TAILQ_FOREACH(mem, &sc->as_memory, am_link) { 756 AGP_DPF(("considering memory block %d\n", mem->am_id)); 757 if (mem->am_id == id) 758 return mem; 759 } 760 return 0; 761 } 762 763 /* Implementation of the userland ioctl api */ 764 765 static int 766 agp_info_user(struct agp_softc *sc, agp_info *info) 767 { 768 memset(info, 0, sizeof *info); 769 info->bridge_id = sc->as_id; 770 if (sc->as_capoff != 0) 771 info->agp_mode = pci_conf_read(sc->as_pc, sc->as_tag, 772 sc->as_capoff + AGP_STATUS); 773 else 774 info->agp_mode = 0; /* i810 doesn't have real AGP */ 775 info->aper_base = sc->as_apaddr; 776 info->aper_size = AGP_GET_APERTURE(sc) >> 20; 777 info->pg_total = info->pg_system = sc->as_maxmem >> AGP_PAGE_SHIFT; 778 info->pg_used = sc->as_allocated >> AGP_PAGE_SHIFT; 779 780 return 0; 781 } 782 783 static int 784 agp_setup_user(struct agp_softc *sc, agp_setup *setup) 785 { 786 return AGP_ENABLE(sc, setup->agp_mode); 787 } 788 789 static int 790 agp_allocate_user(struct agp_softc *sc, agp_allocate *alloc) 791 { 792 struct agp_memory *mem; 793 794 mem = AGP_ALLOC_MEMORY(sc, 795 alloc->type, 796 alloc->pg_count << AGP_PAGE_SHIFT); 797 if (mem) { 798 alloc->key = mem->am_id; 799 alloc->physical = mem->am_physical; 800 return 0; 801 } else { 802 return ENOMEM; 803 } 804 } 805 806 static int 807 agp_deallocate_user(struct agp_softc *sc, int id) 808 { 809 struct agp_memory *mem = agp_find_memory(sc, id); 810 811 if (mem) { 812 AGP_FREE_MEMORY(sc, mem); 813 return 0; 814 } else { 815 return ENOENT; 816 } 817 } 818 819 static int 820 agp_bind_user(struct agp_softc *sc, agp_bind *bind) 821 { 822 struct agp_memory *mem = agp_find_memory(sc, bind->key); 823 824 if (!mem) 825 return ENOENT; 826 827 return AGP_BIND_MEMORY(sc, mem, bind->pg_start << AGP_PAGE_SHIFT); 828 } 829 830 static int 831 agp_unbind_user(struct agp_softc *sc, agp_unbind *unbind) 832 { 833 struct agp_memory *mem = agp_find_memory(sc, unbind->key); 834 835 if (!mem) 836 return ENOENT; 837 838 return AGP_UNBIND_MEMORY(sc, mem); 839 } 840 841 static int 842 agpopen(dev_t dev, int oflags, int devtype, struct lwp *l) 843 { 844 struct agp_softc *sc = device_lookup_private(&agp_cd, AGPUNIT(dev)); 845 846 if (sc == NULL) 847 return ENXIO; 848 849 if (sc->as_chipc == NULL) 850 return ENXIO; 851 852 if (!sc->as_isopen) 853 sc->as_isopen = 1; 854 else 855 return EBUSY; 856 857 return 0; 858 } 859 860 static int 861 agpclose(dev_t dev, int fflag, int devtype, struct lwp *l) 862 { 863 struct agp_softc *sc = device_lookup_private(&agp_cd, AGPUNIT(dev)); 864 struct agp_memory *mem; 865 866 if (sc == NULL) 867 return ENODEV; 868 869 /* 870 * Clear the GATT and force release on last close 871 */ 872 if (sc->as_state == AGP_ACQUIRE_USER) { 873 while ((mem = TAILQ_FIRST(&sc->as_memory))) { 874 if (mem->am_is_bound) { 875 printf("agpclose: mem %d is bound\n", 876 mem->am_id); 877 AGP_UNBIND_MEMORY(sc, mem); 878 } 879 /* 880 * XXX it is not documented, but if the protocol allows 881 * allocate->acquire->bind, it would be possible that 882 * memory ranges are allocated by the kernel here, 883 * which we shouldn't free. We'd have to keep track of 884 * the memory range's owner. 885 * The kernel API is unsed yet, so we get away with 886 * freeing all. 887 */ 888 AGP_FREE_MEMORY(sc, mem); 889 } 890 agp_release_helper(sc, AGP_ACQUIRE_USER); 891 } 892 sc->as_isopen = 0; 893 894 return 0; 895 } 896 897 static int 898 agpioctl(dev_t dev, u_long cmd, void *data, int fflag, struct lwp *l) 899 { 900 struct agp_softc *sc = device_lookup_private(&agp_cd, AGPUNIT(dev)); 901 902 if (sc == NULL) 903 return ENODEV; 904 905 if ((fflag & FWRITE) == 0 && cmd != AGPIOC_INFO) 906 return EPERM; 907 908 switch (cmd) { 909 case AGPIOC_INFO: 910 return agp_info_user(sc, (agp_info *) data); 911 912 case AGPIOC_ACQUIRE: 913 return agp_acquire_helper(sc, AGP_ACQUIRE_USER); 914 915 case AGPIOC_RELEASE: 916 return agp_release_helper(sc, AGP_ACQUIRE_USER); 917 918 case AGPIOC_SETUP: 919 return agp_setup_user(sc, (agp_setup *)data); 920 921 case AGPIOC_ALLOCATE: 922 return agp_allocate_user(sc, (agp_allocate *)data); 923 924 case AGPIOC_DEALLOCATE: 925 return agp_deallocate_user(sc, *(int *) data); 926 927 case AGPIOC_BIND: 928 return agp_bind_user(sc, (agp_bind *)data); 929 930 case AGPIOC_UNBIND: 931 return agp_unbind_user(sc, (agp_unbind *)data); 932 933 } 934 935 return EINVAL; 936 } 937 938 static paddr_t 939 agpmmap(dev_t dev, off_t offset, int prot) 940 { 941 struct agp_softc *sc = device_lookup_private(&agp_cd, AGPUNIT(dev)); 942 943 if (sc == NULL) 944 return ENODEV; 945 946 if (offset > AGP_GET_APERTURE(sc)) 947 return -1; 948 949 return (bus_space_mmap(sc->as_apt, sc->as_apaddr, offset, prot, 950 BUS_SPACE_MAP_LINEAR)); 951 } 952 953 const struct cdevsw agp_cdevsw = { 954 agpopen, agpclose, noread, nowrite, agpioctl, 955 nostop, notty, nopoll, agpmmap, nokqfilter, D_OTHER 956 }; 957 958 /* Implementation of the kernel api */ 959 960 void * 961 agp_find_device(int unit) 962 { 963 return device_lookup_private(&agp_cd, unit); 964 } 965 966 enum agp_acquire_state 967 agp_state(void *devcookie) 968 { 969 struct agp_softc *sc = devcookie; 970 971 return sc->as_state; 972 } 973 974 void 975 agp_get_info(void *devcookie, struct agp_info *info) 976 { 977 struct agp_softc *sc = devcookie; 978 979 info->ai_mode = pci_conf_read(sc->as_pc, sc->as_tag, 980 sc->as_capoff + AGP_STATUS); 981 info->ai_aperture_base = sc->as_apaddr; 982 info->ai_aperture_size = sc->as_apsize; /* XXXfvdl inconsistent */ 983 info->ai_memory_allowed = sc->as_maxmem; 984 info->ai_memory_used = sc->as_allocated; 985 } 986 987 int 988 agp_acquire(void *dev) 989 { 990 return agp_acquire_helper(dev, AGP_ACQUIRE_KERNEL); 991 } 992 993 int 994 agp_release(void *dev) 995 { 996 return agp_release_helper(dev, AGP_ACQUIRE_KERNEL); 997 } 998 999 int 1000 agp_enable(void *dev, u_int32_t mode) 1001 { 1002 struct agp_softc *sc = dev; 1003 1004 return AGP_ENABLE(sc, mode); 1005 } 1006 1007 void * 1008 agp_alloc_memory(void *dev, int type, vsize_t bytes) 1009 { 1010 struct agp_softc *sc = dev; 1011 1012 return (void *)AGP_ALLOC_MEMORY(sc, type, bytes); 1013 } 1014 1015 void 1016 agp_free_memory(void *dev, void *handle) 1017 { 1018 struct agp_softc *sc = dev; 1019 struct agp_memory *mem = handle; 1020 1021 AGP_FREE_MEMORY(sc, mem); 1022 } 1023 1024 int 1025 agp_bind_memory(void *dev, void *handle, off_t offset) 1026 { 1027 struct agp_softc *sc = dev; 1028 struct agp_memory *mem = handle; 1029 1030 return AGP_BIND_MEMORY(sc, mem, offset); 1031 } 1032 1033 int 1034 agp_unbind_memory(void *dev, void *handle) 1035 { 1036 struct agp_softc *sc = dev; 1037 struct agp_memory *mem = handle; 1038 1039 return AGP_UNBIND_MEMORY(sc, mem); 1040 } 1041 1042 void 1043 agp_memory_info(void *dev, void *handle, struct agp_memory_info *mi) 1044 { 1045 struct agp_memory *mem = handle; 1046 1047 mi->ami_size = mem->am_size; 1048 mi->ami_physical = mem->am_physical; 1049 mi->ami_offset = mem->am_offset; 1050 mi->ami_is_bound = mem->am_is_bound; 1051 } 1052 1053 int 1054 agp_alloc_dmamem(bus_dma_tag_t tag, size_t size, int flags, 1055 bus_dmamap_t *mapp, void **vaddr, bus_addr_t *baddr, 1056 bus_dma_segment_t *seg, int nseg, int *rseg) 1057 1058 { 1059 int error, level = 0; 1060 1061 if ((error = bus_dmamem_alloc(tag, size, PAGE_SIZE, 0, 1062 seg, nseg, rseg, BUS_DMA_NOWAIT)) != 0) 1063 goto out; 1064 level++; 1065 1066 if ((error = bus_dmamem_map(tag, seg, *rseg, size, vaddr, 1067 BUS_DMA_NOWAIT | flags)) != 0) 1068 goto out; 1069 level++; 1070 1071 if ((error = bus_dmamap_create(tag, size, *rseg, size, 0, 1072 BUS_DMA_NOWAIT, mapp)) != 0) 1073 goto out; 1074 level++; 1075 1076 if ((error = bus_dmamap_load(tag, *mapp, *vaddr, size, NULL, 1077 BUS_DMA_NOWAIT)) != 0) 1078 goto out; 1079 1080 *baddr = (*mapp)->dm_segs[0].ds_addr; 1081 1082 return 0; 1083 out: 1084 switch (level) { 1085 case 3: 1086 bus_dmamap_destroy(tag, *mapp); 1087 /* FALLTHROUGH */ 1088 case 2: 1089 bus_dmamem_unmap(tag, *vaddr, size); 1090 /* FALLTHROUGH */ 1091 case 1: 1092 bus_dmamem_free(tag, seg, *rseg); 1093 break; 1094 default: 1095 break; 1096 } 1097 1098 return error; 1099 } 1100 1101 void 1102 agp_free_dmamem(bus_dma_tag_t tag, size_t size, bus_dmamap_t map, 1103 void *vaddr, bus_dma_segment_t *seg, int nseg) 1104 { 1105 bus_dmamap_unload(tag, map); 1106 bus_dmamap_destroy(tag, map); 1107 bus_dmamem_unmap(tag, vaddr, size); 1108 bus_dmamem_free(tag, seg, nseg); 1109 } 1110 1111 static bool 1112 agp_resume(device_t dv PMF_FN_ARGS) 1113 { 1114 agp_flush_cache(); 1115 1116 return true; 1117 } 1118
Indexes created Tue Sep 23 14:10:03 GMT 2025