agp.c revision 1.54.10.5
1 /* $NetBSD: agp.c,v 1.54.10.5 2008/09/28 10:40:25 mjf 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 1.54.10.5 2008/09/28 10:40:25 mjf 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 static int agpopen(dev_t, int, int, struct lwp *); 108 static int agpclose(dev_t, int, int, struct lwp *); 109 static paddr_t agpmmap(dev_t, off_t, int); 110 static int agpioctl(dev_t, u_long, void *, int, struct lwp *); 111 112 #include "agp_ali.h" 113 #include "agp_amd.h" 114 #include "agp_i810.h" 115 #include "agp_intel.h" 116 #include "agp_sis.h" 117 #include "agp_via.h" 118 #include "agp_amd64.h" 119 120 const struct agp_product { 121 uint32_t ap_vendor; 122 uint32_t ap_product; 123 int (*ap_match)(const struct pci_attach_args *); 124 int (*ap_attach)(device_t, device_t, void *); 125 } agp_products[] = { 126 #if NAGP_AMD64 > 0 127 { PCI_VENDOR_ALI, PCI_PRODUCT_ALI_M1689, 128 agp_amd64_match, agp_amd64_attach }, 129 #endif 130 131 #if NAGP_ALI > 0 132 { PCI_VENDOR_ALI, -1, 133 NULL, agp_ali_attach }, 134 #endif 135 136 #if NAGP_AMD64 > 0 137 { PCI_VENDOR_AMD, PCI_PRODUCT_AMD_AGP8151_DEV, 138 agp_amd64_match, agp_amd64_attach }, 139 #endif 140 141 #if NAGP_AMD > 0 142 { PCI_VENDOR_AMD, -1, 143 agp_amd_match, agp_amd_attach }, 144 #endif 145 146 #if NAGP_I810 > 0 147 { PCI_VENDOR_INTEL, PCI_PRODUCT_INTEL_82810_MCH, 148 NULL, agp_i810_attach }, 149 { PCI_VENDOR_INTEL, PCI_PRODUCT_INTEL_82810_DC100_MCH, 150 NULL, agp_i810_attach }, 151 { PCI_VENDOR_INTEL, PCI_PRODUCT_INTEL_82810E_MCH, 152 NULL, agp_i810_attach }, 153 { PCI_VENDOR_INTEL, PCI_PRODUCT_INTEL_82815_FULL_HUB, 154 NULL, agp_i810_attach }, 155 { PCI_VENDOR_INTEL, PCI_PRODUCT_INTEL_82840_HB, 156 NULL, agp_i810_attach }, 157 { PCI_VENDOR_INTEL, PCI_PRODUCT_INTEL_82830MP_IO_1, 158 NULL, agp_i810_attach }, 159 { PCI_VENDOR_INTEL, PCI_PRODUCT_INTEL_82845G_DRAM, 160 NULL, agp_i810_attach }, 161 { PCI_VENDOR_INTEL, PCI_PRODUCT_INTEL_82855GM_MCH, 162 NULL, agp_i810_attach }, 163 { PCI_VENDOR_INTEL, PCI_PRODUCT_INTEL_82865_HB, 164 NULL, agp_i810_attach }, 165 { PCI_VENDOR_INTEL, PCI_PRODUCT_INTEL_82915G_HB, 166 NULL, agp_i810_attach }, 167 { PCI_VENDOR_INTEL, PCI_PRODUCT_INTEL_82915GM_HB, 168 NULL, agp_i810_attach }, 169 { PCI_VENDOR_INTEL, PCI_PRODUCT_INTEL_82945P_MCH, 170 NULL, agp_i810_attach }, 171 { PCI_VENDOR_INTEL, PCI_PRODUCT_INTEL_82945GM_HB, 172 NULL, agp_i810_attach }, 173 { PCI_VENDOR_INTEL, PCI_PRODUCT_INTEL_82945GME_HB, 174 NULL, agp_i810_attach }, 175 { PCI_VENDOR_INTEL, PCI_PRODUCT_INTEL_82965Q_HB, 176 NULL, agp_i810_attach }, 177 { PCI_VENDOR_INTEL, PCI_PRODUCT_INTEL_82965PM_HB, 178 NULL, agp_i810_attach }, 179 { PCI_VENDOR_INTEL, PCI_PRODUCT_INTEL_82965G_HB, 180 NULL, agp_i810_attach }, 181 { PCI_VENDOR_INTEL, PCI_PRODUCT_INTEL_82Q35_HB, 182 NULL, agp_i810_attach }, 183 { PCI_VENDOR_INTEL, PCI_PRODUCT_INTEL_82G33_HB, 184 NULL, agp_i810_attach }, 185 { PCI_VENDOR_INTEL, PCI_PRODUCT_INTEL_82Q33_HB, 186 NULL, agp_i810_attach }, 187 { PCI_VENDOR_INTEL, PCI_PRODUCT_INTEL_82946GZ_HB, 188 NULL, agp_i810_attach }, 189 #endif 190 191 #if NAGP_INTEL > 0 192 { PCI_VENDOR_INTEL, -1, 193 NULL, agp_intel_attach }, 194 #endif 195 196 #if NAGP_AMD64 > 0 197 { PCI_VENDOR_NVIDIA, PCI_PRODUCT_NVIDIA_NFORCE3_PCHB, 198 agp_amd64_match, agp_amd64_attach }, 199 { PCI_VENDOR_NVIDIA, PCI_PRODUCT_NVIDIA_NFORCE3_250_PCHB, 200 agp_amd64_match, agp_amd64_attach }, 201 #endif 202 203 #if NAGP_AMD64 > 0 204 { PCI_VENDOR_SIS, PCI_PRODUCT_SIS_755, 205 agp_amd64_match, agp_amd64_attach }, 206 { PCI_VENDOR_SIS, PCI_PRODUCT_SIS_760, 207 agp_amd64_match, agp_amd64_attach }, 208 #endif 209 210 #if NAGP_SIS > 0 211 { PCI_VENDOR_SIS, -1, 212 NULL, agp_sis_attach }, 213 #endif 214 215 #if NAGP_AMD64 > 0 216 { PCI_VENDOR_VIATECH, PCI_PRODUCT_VIATECH_K8M800_0, 217 agp_amd64_match, agp_amd64_attach }, 218 { PCI_VENDOR_VIATECH, PCI_PRODUCT_VIATECH_K8T890_0, 219 agp_amd64_match, agp_amd64_attach }, 220 { PCI_VENDOR_VIATECH, PCI_PRODUCT_VIATECH_K8HTB_0, 221 agp_amd64_match, agp_amd64_attach }, 222 { PCI_VENDOR_VIATECH, PCI_PRODUCT_VIATECH_K8HTB, 223 agp_amd64_match, agp_amd64_attach }, 224 #endif 225 226 #if NAGP_VIA > 0 227 { PCI_VENDOR_VIATECH, -1, 228 NULL, agp_via_attach }, 229 #endif 230 231 { 0, 0, 232 NULL, NULL }, 233 }; 234 235 const struct cdevsw agp_cdevsw = { 236 agpopen, agpclose, noread, nowrite, agpioctl, 237 nostop, notty, nopoll, agpmmap, nokqfilter, D_OTHER 238 }; 239 240 static const struct agp_product * 241 agp_lookup(const struct pci_attach_args *pa) 242 { 243 const struct agp_product *ap; 244 245 /* First find the vendor. */ 246 for (ap = agp_products; ap->ap_attach != NULL; ap++) { 247 if (PCI_VENDOR(pa->pa_id) == ap->ap_vendor) 248 break; 249 } 250 251 if (ap->ap_attach == NULL) 252 return (NULL); 253 254 /* Now find the product within the vendor's domain. */ 255 for (; ap->ap_attach != NULL; ap++) { 256 if (PCI_VENDOR(pa->pa_id) != ap->ap_vendor) { 257 /* Ran out of this vendor's section of the table. */ 258 return (NULL); 259 } 260 if (ap->ap_product == PCI_PRODUCT(pa->pa_id)) { 261 /* Exact match. */ 262 break; 263 } 264 if (ap->ap_product == (uint32_t) -1) { 265 /* Wildcard match. */ 266 break; 267 } 268 } 269 270 if (ap->ap_attach == NULL) 271 return (NULL); 272 273 /* Now let the product-specific driver filter the match. */ 274 if (ap->ap_match != NULL && (*ap->ap_match)(pa) == 0) 275 return (NULL); 276 277 return (ap); 278 } 279 280 static int 281 agpmatch(device_t parent, cfdata_t match, void *aux) 282 { 283 struct agpbus_attach_args *apa = aux; 284 struct pci_attach_args *pa = &apa->apa_pci_args; 285 286 if (agp_lookup(pa) == NULL) 287 return (0); 288 289 return (1); 290 } 291 292 static const int agp_max[][2] = { 293 {0, 0}, 294 {32, 4}, 295 {64, 28}, 296 {128, 96}, 297 {256, 204}, 298 {512, 440}, 299 {1024, 942}, 300 {2048, 1920}, 301 {4096, 3932} 302 }; 303 #define agp_max_size (sizeof(agp_max) / sizeof(agp_max[0])) 304 305 static void 306 agpattach(device_t parent, device_t self, void *aux) 307 { 308 struct agpbus_attach_args *apa = aux; 309 struct pci_attach_args *pa = &apa->apa_pci_args; 310 struct agp_softc *sc = device_private(self); 311 const struct agp_product *ap; 312 int memsize, i, ret; 313 int major = cdevsw_lookup_major(&agp_cdevsw); 314 int unit; 315 316 ap = agp_lookup(pa); 317 KASSERT(ap != NULL); 318 319 aprint_naive(": AGP controller\n"); 320 321 sc->as_dev = self; 322 sc->as_dmat = pa->pa_dmat; 323 sc->as_pc = pa->pa_pc; 324 sc->as_tag = pa->pa_tag; 325 sc->as_id = pa->pa_id; 326 327 /* 328 * Work out an upper bound for agp memory allocation. This 329 * uses a heuristic table from the Linux driver. 330 */ 331 memsize = ptoa(physmem) >> 20; 332 for (i = 0; i < agp_max_size; i++) { 333 if (memsize <= agp_max[i][0]) 334 break; 335 } 336 if (i == agp_max_size) 337 i = agp_max_size - 1; 338 sc->as_maxmem = agp_max[i][1] << 20U; 339 340 /* 341 * The mutex is used to prevent re-entry to 342 * agp_generic_bind_memory() since that function can sleep. 343 */ 344 mutex_init(&sc->as_mtx, MUTEX_DEFAULT, IPL_NONE); 345 346 TAILQ_INIT(&sc->as_memory); 347 348 ret = (*ap->ap_attach)(parent, self, pa); 349 if (ret == 0) 350 aprint_normal(": aperture at 0x%lx, size 0x%lx\n", 351 (unsigned long)sc->as_apaddr, 352 (unsigned long)AGP_GET_APERTURE(sc)); 353 else 354 sc->as_chipc = NULL; 355 356 if (!device_pmf_is_registered(self)) { 357 if (!pmf_device_register(self, NULL, agp_resume)) 358 aprint_error_dev(self, "couldn't establish power " 359 "handler\n"); 360 } 361 362 unit = device_unit(self); 363 device_register_name(makedev(major, unit), self, true, DEV_VIDEO, 364 "agp%d", unit); 365 } 366 367 CFATTACH_DECL_NEW(agp, sizeof(struct agp_softc), 368 agpmatch, agpattach, NULL, NULL); 369 370 int 371 agp_map_aperture(struct pci_attach_args *pa, struct agp_softc *sc, int reg) 372 { 373 /* 374 * Find the aperture. Don't map it (yet), this would 375 * eat KVA. 376 */ 377 if (pci_mapreg_info(pa->pa_pc, pa->pa_tag, reg, 378 PCI_MAPREG_TYPE_MEM, &sc->as_apaddr, &sc->as_apsize, 379 &sc->as_apflags) != 0) 380 return ENXIO; 381 382 sc->as_apt = pa->pa_memt; 383 384 return 0; 385 } 386 387 struct agp_gatt * 388 agp_alloc_gatt(struct agp_softc *sc) 389 { 390 u_int32_t apsize = AGP_GET_APERTURE(sc); 391 u_int32_t entries = apsize >> AGP_PAGE_SHIFT; 392 struct agp_gatt *gatt; 393 void *virtual; 394 int dummyseg; 395 396 gatt = malloc(sizeof(struct agp_gatt), M_AGP, M_NOWAIT); 397 if (!gatt) 398 return NULL; 399 gatt->ag_entries = entries; 400 401 if (agp_alloc_dmamem(sc->as_dmat, entries * sizeof(u_int32_t), 402 0, &gatt->ag_dmamap, &virtual, &gatt->ag_physical, 403 &gatt->ag_dmaseg, 1, &dummyseg) != 0) 404 return NULL; 405 gatt->ag_virtual = (uint32_t *)virtual; 406 407 gatt->ag_size = entries * sizeof(u_int32_t); 408 memset(gatt->ag_virtual, 0, gatt->ag_size); 409 agp_flush_cache(); 410 411 return gatt; 412 } 413 414 void 415 agp_free_gatt(struct agp_softc *sc, struct agp_gatt *gatt) 416 { 417 agp_free_dmamem(sc->as_dmat, gatt->ag_size, gatt->ag_dmamap, 418 (void *)gatt->ag_virtual, &gatt->ag_dmaseg, 1); 419 free(gatt, M_AGP); 420 } 421 422 423 int 424 agp_generic_detach(struct agp_softc *sc) 425 { 426 mutex_destroy(&sc->as_mtx); 427 agp_flush_cache(); 428 return 0; 429 } 430 431 static int 432 agpdev_match(struct pci_attach_args *pa) 433 { 434 if (PCI_CLASS(pa->pa_class) == PCI_CLASS_DISPLAY && 435 PCI_SUBCLASS(pa->pa_class) == PCI_SUBCLASS_DISPLAY_VGA) 436 if (pci_get_capability(pa->pa_pc, pa->pa_tag, PCI_CAP_AGP, 437 NULL, NULL)) 438 return 1; 439 440 return 0; 441 } 442 443 int 444 agp_generic_enable(struct agp_softc *sc, u_int32_t mode) 445 { 446 struct pci_attach_args pa; 447 pcireg_t tstatus, mstatus; 448 pcireg_t command; 449 int rq, sba, fw, rate, capoff; 450 451 if (pci_find_device(&pa, agpdev_match) == 0 || 452 pci_get_capability(pa.pa_pc, pa.pa_tag, PCI_CAP_AGP, 453 &capoff, NULL) == 0) { 454 aprint_error_dev(sc->as_dev, "can't find display\n"); 455 return ENXIO; 456 } 457 458 tstatus = pci_conf_read(sc->as_pc, sc->as_tag, 459 sc->as_capoff + AGP_STATUS); 460 mstatus = pci_conf_read(pa.pa_pc, pa.pa_tag, 461 capoff + AGP_STATUS); 462 463 /* Set RQ to the min of mode, tstatus and mstatus */ 464 rq = AGP_MODE_GET_RQ(mode); 465 if (AGP_MODE_GET_RQ(tstatus) < rq) 466 rq = AGP_MODE_GET_RQ(tstatus); 467 if (AGP_MODE_GET_RQ(mstatus) < rq) 468 rq = AGP_MODE_GET_RQ(mstatus); 469 470 /* Set SBA if all three can deal with SBA */ 471 sba = (AGP_MODE_GET_SBA(tstatus) 472 & AGP_MODE_GET_SBA(mstatus) 473 & AGP_MODE_GET_SBA(mode)); 474 475 /* Similar for FW */ 476 fw = (AGP_MODE_GET_FW(tstatus) 477 & AGP_MODE_GET_FW(mstatus) 478 & AGP_MODE_GET_FW(mode)); 479 480 /* Figure out the max rate */ 481 rate = (AGP_MODE_GET_RATE(tstatus) 482 & AGP_MODE_GET_RATE(mstatus) 483 & AGP_MODE_GET_RATE(mode)); 484 if (rate & AGP_MODE_RATE_4x) 485 rate = AGP_MODE_RATE_4x; 486 else if (rate & AGP_MODE_RATE_2x) 487 rate = AGP_MODE_RATE_2x; 488 else 489 rate = AGP_MODE_RATE_1x; 490 491 /* Construct the new mode word and tell the hardware */ 492 command = AGP_MODE_SET_RQ(0, rq); 493 command = AGP_MODE_SET_SBA(command, sba); 494 command = AGP_MODE_SET_FW(command, fw); 495 command = AGP_MODE_SET_RATE(command, rate); 496 command = AGP_MODE_SET_AGP(command, 1); 497 pci_conf_write(sc->as_pc, sc->as_tag, 498 sc->as_capoff + AGP_COMMAND, command); 499 pci_conf_write(pa.pa_pc, pa.pa_tag, capoff + AGP_COMMAND, command); 500 501 return 0; 502 } 503 504 struct agp_memory * 505 agp_generic_alloc_memory(struct agp_softc *sc, int type, vsize_t size) 506 { 507 struct agp_memory *mem; 508 509 if ((size & (AGP_PAGE_SIZE - 1)) != 0) 510 return 0; 511 512 if (sc->as_allocated + size > sc->as_maxmem) 513 return 0; 514 515 if (type != 0) { 516 printf("agp_generic_alloc_memory: unsupported type %d\n", 517 type); 518 return 0; 519 } 520 521 mem = malloc(sizeof *mem, M_AGP, M_WAITOK); 522 if (mem == NULL) 523 return NULL; 524 525 if (bus_dmamap_create(sc->as_dmat, size, size / PAGE_SIZE + 1, 526 size, 0, BUS_DMA_NOWAIT, &mem->am_dmamap) != 0) { 527 free(mem, M_AGP); 528 return NULL; 529 } 530 531 mem->am_id = sc->as_nextid++; 532 mem->am_size = size; 533 mem->am_type = 0; 534 mem->am_physical = 0; 535 mem->am_offset = 0; 536 mem->am_is_bound = 0; 537 TAILQ_INSERT_TAIL(&sc->as_memory, mem, am_link); 538 sc->as_allocated += size; 539 540 return mem; 541 } 542 543 int 544 agp_generic_free_memory(struct agp_softc *sc, struct agp_memory *mem) 545 { 546 if (mem->am_is_bound) 547 return EBUSY; 548 549 sc->as_allocated -= mem->am_size; 550 TAILQ_REMOVE(&sc->as_memory, mem, am_link); 551 bus_dmamap_destroy(sc->as_dmat, mem->am_dmamap); 552 free(mem, M_AGP); 553 return 0; 554 } 555 556 int 557 agp_generic_bind_memory(struct agp_softc *sc, struct agp_memory *mem, 558 off_t offset) 559 { 560 off_t i, k; 561 bus_size_t done, j; 562 int error; 563 bus_dma_segment_t *segs, *seg; 564 bus_addr_t pa; 565 int contigpages, nseg; 566 567 mutex_enter(&sc->as_mtx); 568 569 if (mem->am_is_bound) { 570 aprint_error_dev(sc->as_dev, "memory already bound\n"); 571 mutex_exit(&sc->as_mtx); 572 return EINVAL; 573 } 574 575 if (offset < 0 576 || (offset & (AGP_PAGE_SIZE - 1)) != 0 577 || offset + mem->am_size > AGP_GET_APERTURE(sc)) { 578 aprint_error_dev(sc->as_dev, 579 "binding memory at bad offset %#lx\n", 580 (unsigned long) offset); 581 mutex_exit(&sc->as_mtx); 582 return EINVAL; 583 } 584 585 /* 586 * XXXfvdl 587 * The memory here needs to be directly accessable from the 588 * AGP video card, so it should be allocated using bus_dma. 589 * However, it need not be contiguous, since individual pages 590 * are translated using the GATT. 591 * 592 * Using a large chunk of contiguous memory may get in the way 593 * of other subsystems that may need one, so we try to be friendly 594 * and ask for allocation in chunks of a minimum of 8 pages 595 * of contiguous memory on average, falling back to 4, 2 and 1 596 * if really needed. Larger chunks are preferred, since allocating 597 * a bus_dma_segment per page would be overkill. 598 */ 599 600 for (contigpages = 8; contigpages > 0; contigpages >>= 1) { 601 nseg = (mem->am_size / (contigpages * PAGE_SIZE)) + 1; 602 segs = malloc(nseg * sizeof *segs, M_AGP, M_WAITOK); 603 if (segs == NULL) { 604 mutex_exit(&sc->as_mtx); 605 return ENOMEM; 606 } 607 if (bus_dmamem_alloc(sc->as_dmat, mem->am_size, PAGE_SIZE, 0, 608 segs, nseg, &mem->am_nseg, 609 contigpages > 1 ? 610 BUS_DMA_NOWAIT : BUS_DMA_WAITOK) != 0) { 611 free(segs, M_AGP); 612 continue; 613 } 614 if (bus_dmamem_map(sc->as_dmat, segs, mem->am_nseg, 615 mem->am_size, &mem->am_virtual, BUS_DMA_WAITOK) != 0) { 616 bus_dmamem_free(sc->as_dmat, segs, mem->am_nseg); 617 free(segs, M_AGP); 618 continue; 619 } 620 if (bus_dmamap_load(sc->as_dmat, mem->am_dmamap, 621 mem->am_virtual, mem->am_size, NULL, BUS_DMA_WAITOK) != 0) { 622 bus_dmamem_unmap(sc->as_dmat, mem->am_virtual, 623 mem->am_size); 624 bus_dmamem_free(sc->as_dmat, segs, mem->am_nseg); 625 free(segs, M_AGP); 626 continue; 627 } 628 mem->am_dmaseg = segs; 629 break; 630 } 631 632 if (contigpages == 0) { 633 mutex_exit(&sc->as_mtx); 634 return ENOMEM; 635 } 636 637 638 /* 639 * Bind the individual pages and flush the chipset's 640 * TLB. 641 */ 642 done = 0; 643 for (i = 0; i < mem->am_dmamap->dm_nsegs; i++) { 644 seg = &mem->am_dmamap->dm_segs[i]; 645 /* 646 * Install entries in the GATT, making sure that if 647 * AGP_PAGE_SIZE < PAGE_SIZE and mem->am_size is not 648 * aligned to PAGE_SIZE, we don't modify too many GATT 649 * entries. 650 */ 651 for (j = 0; j < seg->ds_len && (done + j) < mem->am_size; 652 j += AGP_PAGE_SIZE) { 653 pa = seg->ds_addr + j; 654 AGP_DPF(("binding offset %#lx to pa %#lx\n", 655 (unsigned long)(offset + done + j), 656 (unsigned long)pa)); 657 error = AGP_BIND_PAGE(sc, offset + done + j, pa); 658 if (error) { 659 /* 660 * Bail out. Reverse all the mappings 661 * and unwire the pages. 662 */ 663 for (k = 0; k < done + j; k += AGP_PAGE_SIZE) 664 AGP_UNBIND_PAGE(sc, offset + k); 665 666 bus_dmamap_unload(sc->as_dmat, mem->am_dmamap); 667 bus_dmamem_unmap(sc->as_dmat, mem->am_virtual, 668 mem->am_size); 669 bus_dmamem_free(sc->as_dmat, mem->am_dmaseg, 670 mem->am_nseg); 671 free(mem->am_dmaseg, M_AGP); 672 mutex_exit(&sc->as_mtx); 673 return error; 674 } 675 } 676 done += seg->ds_len; 677 } 678 679 /* 680 * Flush the CPU cache since we are providing a new mapping 681 * for these pages. 682 */ 683 agp_flush_cache(); 684 685 /* 686 * Make sure the chipset gets the new mappings. 687 */ 688 AGP_FLUSH_TLB(sc); 689 690 mem->am_offset = offset; 691 mem->am_is_bound = 1; 692 693 mutex_exit(&sc->as_mtx); 694 695 return 0; 696 } 697 698 int 699 agp_generic_unbind_memory(struct agp_softc *sc, struct agp_memory *mem) 700 { 701 int i; 702 703 mutex_enter(&sc->as_mtx); 704 705 if (!mem->am_is_bound) { 706 aprint_error_dev(sc->as_dev, "memory is not bound\n"); 707 mutex_exit(&sc->as_mtx); 708 return EINVAL; 709 } 710 711 712 /* 713 * Unbind the individual pages and flush the chipset's 714 * TLB. Unwire the pages so they can be swapped. 715 */ 716 for (i = 0; i < mem->am_size; i += AGP_PAGE_SIZE) 717 AGP_UNBIND_PAGE(sc, mem->am_offset + i); 718 719 agp_flush_cache(); 720 AGP_FLUSH_TLB(sc); 721 722 bus_dmamap_unload(sc->as_dmat, mem->am_dmamap); 723 bus_dmamem_unmap(sc->as_dmat, mem->am_virtual, mem->am_size); 724 bus_dmamem_free(sc->as_dmat, mem->am_dmaseg, mem->am_nseg); 725 726 free(mem->am_dmaseg, M_AGP); 727 728 mem->am_offset = 0; 729 mem->am_is_bound = 0; 730 731 mutex_exit(&sc->as_mtx); 732 733 return 0; 734 } 735 736 /* Helper functions for implementing user/kernel api */ 737 738 static int 739 agp_acquire_helper(struct agp_softc *sc, enum agp_acquire_state state) 740 { 741 if (sc->as_state != AGP_ACQUIRE_FREE) 742 return EBUSY; 743 sc->as_state = state; 744 745 return 0; 746 } 747 748 static int 749 agp_release_helper(struct agp_softc *sc, enum agp_acquire_state state) 750 { 751 752 if (sc->as_state == AGP_ACQUIRE_FREE) 753 return 0; 754 755 if (sc->as_state != state) 756 return EBUSY; 757 758 sc->as_state = AGP_ACQUIRE_FREE; 759 return 0; 760 } 761 762 static struct agp_memory * 763 agp_find_memory(struct agp_softc *sc, int id) 764 { 765 struct agp_memory *mem; 766 767 AGP_DPF(("searching for memory block %d\n", id)); 768 TAILQ_FOREACH(mem, &sc->as_memory, am_link) { 769 AGP_DPF(("considering memory block %d\n", mem->am_id)); 770 if (mem->am_id == id) 771 return mem; 772 } 773 return 0; 774 } 775 776 /* Implementation of the userland ioctl api */ 777 778 static int 779 agp_info_user(struct agp_softc *sc, agp_info *info) 780 { 781 memset(info, 0, sizeof *info); 782 info->bridge_id = sc->as_id; 783 if (sc->as_capoff != 0) 784 info->agp_mode = pci_conf_read(sc->as_pc, sc->as_tag, 785 sc->as_capoff + AGP_STATUS); 786 else 787 info->agp_mode = 0; /* i810 doesn't have real AGP */ 788 info->aper_base = sc->as_apaddr; 789 info->aper_size = AGP_GET_APERTURE(sc) >> 20; 790 info->pg_total = info->pg_system = sc->as_maxmem >> AGP_PAGE_SHIFT; 791 info->pg_used = sc->as_allocated >> AGP_PAGE_SHIFT; 792 793 return 0; 794 } 795 796 static int 797 agp_setup_user(struct agp_softc *sc, agp_setup *setup) 798 { 799 return AGP_ENABLE(sc, setup->agp_mode); 800 } 801 802 static int 803 agp_allocate_user(struct agp_softc *sc, agp_allocate *alloc) 804 { 805 struct agp_memory *mem; 806 807 mem = AGP_ALLOC_MEMORY(sc, 808 alloc->type, 809 alloc->pg_count << AGP_PAGE_SHIFT); 810 if (mem) { 811 alloc->key = mem->am_id; 812 alloc->physical = mem->am_physical; 813 return 0; 814 } else { 815 return ENOMEM; 816 } 817 } 818 819 static int 820 agp_deallocate_user(struct agp_softc *sc, int id) 821 { 822 struct agp_memory *mem = agp_find_memory(sc, id); 823 824 if (mem) { 825 AGP_FREE_MEMORY(sc, mem); 826 return 0; 827 } else { 828 return ENOENT; 829 } 830 } 831 832 static int 833 agp_bind_user(struct agp_softc *sc, agp_bind *bind) 834 { 835 struct agp_memory *mem = agp_find_memory(sc, bind->key); 836 837 if (!mem) 838 return ENOENT; 839 840 return AGP_BIND_MEMORY(sc, mem, bind->pg_start << AGP_PAGE_SHIFT); 841 } 842 843 static int 844 agp_unbind_user(struct agp_softc *sc, agp_unbind *unbind) 845 { 846 struct agp_memory *mem = agp_find_memory(sc, unbind->key); 847 848 if (!mem) 849 return ENOENT; 850 851 return AGP_UNBIND_MEMORY(sc, mem); 852 } 853 854 static int 855 agpopen(dev_t dev, int oflags, int devtype, struct lwp *l) 856 { 857 struct agp_softc *sc = device_lookup_private(&agp_cd, AGPUNIT(dev)); 858 859 if (sc == NULL) 860 return ENXIO; 861 862 if (sc->as_chipc == NULL) 863 return ENXIO; 864 865 if (!sc->as_isopen) 866 sc->as_isopen = 1; 867 else 868 return EBUSY; 869 870 return 0; 871 } 872 873 static int 874 agpclose(dev_t dev, int fflag, int devtype, struct lwp *l) 875 { 876 struct agp_softc *sc = device_lookup_private(&agp_cd, AGPUNIT(dev)); 877 struct agp_memory *mem; 878 879 if (sc == NULL) 880 return ENODEV; 881 882 /* 883 * Clear the GATT and force release on last close 884 */ 885 if (sc->as_state == AGP_ACQUIRE_USER) { 886 while ((mem = TAILQ_FIRST(&sc->as_memory))) { 887 if (mem->am_is_bound) { 888 printf("agpclose: mem %d is bound\n", 889 mem->am_id); 890 AGP_UNBIND_MEMORY(sc, mem); 891 } 892 /* 893 * XXX it is not documented, but if the protocol allows 894 * allocate->acquire->bind, it would be possible that 895 * memory ranges are allocated by the kernel here, 896 * which we shouldn't free. We'd have to keep track of 897 * the memory range's owner. 898 * The kernel API is unsed yet, so we get away with 899 * freeing all. 900 */ 901 AGP_FREE_MEMORY(sc, mem); 902 } 903 agp_release_helper(sc, AGP_ACQUIRE_USER); 904 } 905 sc->as_isopen = 0; 906 907 return 0; 908 } 909 910 static int 911 agpioctl(dev_t dev, u_long cmd, void *data, int fflag, struct lwp *l) 912 { 913 struct agp_softc *sc = device_lookup_private(&agp_cd, AGPUNIT(dev)); 914 915 if (sc == NULL) 916 return ENODEV; 917 918 if ((fflag & FWRITE) == 0 && cmd != AGPIOC_INFO) 919 return EPERM; 920 921 switch (cmd) { 922 case AGPIOC_INFO: 923 return agp_info_user(sc, (agp_info *) data); 924 925 case AGPIOC_ACQUIRE: 926 return agp_acquire_helper(sc, AGP_ACQUIRE_USER); 927 928 case AGPIOC_RELEASE: 929 return agp_release_helper(sc, AGP_ACQUIRE_USER); 930 931 case AGPIOC_SETUP: 932 return agp_setup_user(sc, (agp_setup *)data); 933 934 case AGPIOC_ALLOCATE: 935 return agp_allocate_user(sc, (agp_allocate *)data); 936 937 case AGPIOC_DEALLOCATE: 938 return agp_deallocate_user(sc, *(int *) data); 939 940 case AGPIOC_BIND: 941 return agp_bind_user(sc, (agp_bind *)data); 942 943 case AGPIOC_UNBIND: 944 return agp_unbind_user(sc, (agp_unbind *)data); 945 946 } 947 948 return EINVAL; 949 } 950 951 static paddr_t 952 agpmmap(dev_t dev, off_t offset, int prot) 953 { 954 struct agp_softc *sc = device_lookup_private(&agp_cd, AGPUNIT(dev)); 955 956 if (sc == NULL) 957 return ENODEV; 958 959 if (offset > AGP_GET_APERTURE(sc)) 960 return -1; 961 962 return (bus_space_mmap(sc->as_apt, sc->as_apaddr, offset, prot, 963 BUS_SPACE_MAP_LINEAR)); 964 } 965 966 /* Implementation of the kernel api */ 967 968 void * 969 agp_find_device(int unit) 970 { 971 return device_lookup_private(&agp_cd, unit); 972 } 973 974 enum agp_acquire_state 975 agp_state(void *devcookie) 976 { 977 struct agp_softc *sc = devcookie; 978 979 return sc->as_state; 980 } 981 982 void 983 agp_get_info(void *devcookie, struct agp_info *info) 984 { 985 struct agp_softc *sc = devcookie; 986 987 info->ai_mode = pci_conf_read(sc->as_pc, sc->as_tag, 988 sc->as_capoff + AGP_STATUS); 989 info->ai_aperture_base = sc->as_apaddr; 990 info->ai_aperture_size = sc->as_apsize; /* XXXfvdl inconsistent */ 991 info->ai_memory_allowed = sc->as_maxmem; 992 info->ai_memory_used = sc->as_allocated; 993 } 994 995 int 996 agp_acquire(void *dev) 997 { 998 return agp_acquire_helper(dev, AGP_ACQUIRE_KERNEL); 999 } 1000 1001 int 1002 agp_release(void *dev) 1003 { 1004 return agp_release_helper(dev, AGP_ACQUIRE_KERNEL); 1005 } 1006 1007 int 1008 agp_enable(void *dev, u_int32_t mode) 1009 { 1010 struct agp_softc *sc = dev; 1011 1012 return AGP_ENABLE(sc, mode); 1013 } 1014 1015 void * 1016 agp_alloc_memory(void *dev, int type, vsize_t bytes) 1017 { 1018 struct agp_softc *sc = dev; 1019 1020 return (void *)AGP_ALLOC_MEMORY(sc, type, bytes); 1021 } 1022 1023 void 1024 agp_free_memory(void *dev, void *handle) 1025 { 1026 struct agp_softc *sc = dev; 1027 struct agp_memory *mem = handle; 1028 1029 AGP_FREE_MEMORY(sc, mem); 1030 } 1031 1032 int 1033 agp_bind_memory(void *dev, void *handle, off_t offset) 1034 { 1035 struct agp_softc *sc = dev; 1036 struct agp_memory *mem = handle; 1037 1038 return AGP_BIND_MEMORY(sc, mem, offset); 1039 } 1040 1041 int 1042 agp_unbind_memory(void *dev, void *handle) 1043 { 1044 struct agp_softc *sc = dev; 1045 struct agp_memory *mem = handle; 1046 1047 return AGP_UNBIND_MEMORY(sc, mem); 1048 } 1049 1050 void 1051 agp_memory_info(void *dev, void *handle, struct agp_memory_info *mi) 1052 { 1053 struct agp_memory *mem = handle; 1054 1055 mi->ami_size = mem->am_size; 1056 mi->ami_physical = mem->am_physical; 1057 mi->ami_offset = mem->am_offset; 1058 mi->ami_is_bound = mem->am_is_bound; 1059 } 1060 1061 int 1062 agp_alloc_dmamem(bus_dma_tag_t tag, size_t size, int flags, 1063 bus_dmamap_t *mapp, void **vaddr, bus_addr_t *baddr, 1064 bus_dma_segment_t *seg, int nseg, int *rseg) 1065 1066 { 1067 int error, level = 0; 1068 1069 if ((error = bus_dmamem_alloc(tag, size, PAGE_SIZE, 0, 1070 seg, nseg, rseg, BUS_DMA_NOWAIT)) != 0) 1071 goto out; 1072 level++; 1073 1074 if ((error = bus_dmamem_map(tag, seg, *rseg, size, vaddr, 1075 BUS_DMA_NOWAIT | flags)) != 0) 1076 goto out; 1077 level++; 1078 1079 if ((error = bus_dmamap_create(tag, size, *rseg, size, 0, 1080 BUS_DMA_NOWAIT, mapp)) != 0) 1081 goto out; 1082 level++; 1083 1084 if ((error = bus_dmamap_load(tag, *mapp, *vaddr, size, NULL, 1085 BUS_DMA_NOWAIT)) != 0) 1086 goto out; 1087 1088 *baddr = (*mapp)->dm_segs[0].ds_addr; 1089 1090 return 0; 1091 out: 1092 switch (level) { 1093 case 3: 1094 bus_dmamap_destroy(tag, *mapp); 1095 /* FALLTHROUGH */ 1096 case 2: 1097 bus_dmamem_unmap(tag, *vaddr, size); 1098 /* FALLTHROUGH */ 1099 case 1: 1100 bus_dmamem_free(tag, seg, *rseg); 1101 break; 1102 default: 1103 break; 1104 } 1105 1106 return error; 1107 } 1108 1109 void 1110 agp_free_dmamem(bus_dma_tag_t tag, size_t size, bus_dmamap_t map, 1111 void *vaddr, bus_dma_segment_t *seg, int nseg) 1112 { 1113 bus_dmamap_unload(tag, map); 1114 bus_dmamap_destroy(tag, map); 1115 bus_dmamem_unmap(tag, vaddr, size); 1116 bus_dmamem_free(tag, seg, nseg); 1117 } 1118 1119 static bool 1120 agp_resume(device_t dv PMF_FN_ARGS) 1121 { 1122 agp_flush_cache(); 1123 1124 return true; 1125 } 1126
Indexes created Wed Oct 15 07:09:58 GMT 2025