agp.c revision 1.54.10.3
1 /* $NetBSD: agp.c,v 1.54.10.3 2008/06/02 13:23:36 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 1.54.10.3 2008/06/02 13:23:36 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)(struct device *, struct device *, 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_82965Q_HB, 174 NULL, agp_i810_attach }, 175 { PCI_VENDOR_INTEL, PCI_PRODUCT_INTEL_82965PM_HB, 176 NULL, agp_i810_attach }, 177 { PCI_VENDOR_INTEL, PCI_PRODUCT_INTEL_82965G_HB, 178 NULL, agp_i810_attach }, 179 { PCI_VENDOR_INTEL, PCI_PRODUCT_INTEL_82Q35_HB, 180 NULL, agp_i810_attach }, 181 { PCI_VENDOR_INTEL, PCI_PRODUCT_INTEL_82G33_HB, 182 NULL, agp_i810_attach }, 183 { PCI_VENDOR_INTEL, PCI_PRODUCT_INTEL_82Q33_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 const struct cdevsw agp_cdevsw = { 232 agpopen, agpclose, noread, nowrite, agpioctl, 233 nostop, notty, nopoll, agpmmap, nokqfilter, D_OTHER 234 }; 235 236 static const struct agp_product * 237 agp_lookup(const struct pci_attach_args *pa) 238 { 239 const struct agp_product *ap; 240 241 /* First find the vendor. */ 242 for (ap = agp_products; ap->ap_attach != NULL; ap++) { 243 if (PCI_VENDOR(pa->pa_id) == ap->ap_vendor) 244 break; 245 } 246 247 if (ap->ap_attach == NULL) 248 return (NULL); 249 250 /* Now find the product within the vendor's domain. */ 251 for (; ap->ap_attach != NULL; ap++) { 252 if (PCI_VENDOR(pa->pa_id) != ap->ap_vendor) { 253 /* Ran out of this vendor's section of the table. */ 254 return (NULL); 255 } 256 if (ap->ap_product == PCI_PRODUCT(pa->pa_id)) { 257 /* Exact match. */ 258 break; 259 } 260 if (ap->ap_product == (uint32_t) -1) { 261 /* Wildcard match. */ 262 break; 263 } 264 } 265 266 if (ap->ap_attach == NULL) 267 return (NULL); 268 269 /* Now let the product-specific driver filter the match. */ 270 if (ap->ap_match != NULL && (*ap->ap_match)(pa) == 0) 271 return (NULL); 272 273 return (ap); 274 } 275 276 static int 277 agpmatch(struct device *parent, struct cfdata *match, 278 void *aux) 279 { 280 struct agpbus_attach_args *apa = aux; 281 struct pci_attach_args *pa = &apa->apa_pci_args; 282 283 if (agp_lookup(pa) == NULL) 284 return (0); 285 286 return (1); 287 } 288 289 static const int agp_max[][2] = { 290 {0, 0}, 291 {32, 4}, 292 {64, 28}, 293 {128, 96}, 294 {256, 204}, 295 {512, 440}, 296 {1024, 942}, 297 {2048, 1920}, 298 {4096, 3932} 299 }; 300 #define agp_max_size (sizeof(agp_max) / sizeof(agp_max[0])) 301 302 static void 303 agpattach(struct device *parent, struct device *self, void *aux) 304 { 305 struct agpbus_attach_args *apa = aux; 306 struct pci_attach_args *pa = &apa->apa_pci_args; 307 struct agp_softc *sc = (void *)self; 308 const struct agp_product *ap; 309 int memsize, i, ret; 310 int major = cdevsw_lookup_major(&agp_cdevsw); 311 int unit; 312 313 ap = agp_lookup(pa); 314 if (ap == NULL) { 315 printf("\n"); 316 panic("agpattach: impossible"); 317 } 318 319 aprint_naive(": AGP controller\n"); 320 321 sc->as_dmat = pa->pa_dmat; 322 sc->as_pc = pa->pa_pc; 323 sc->as_tag = pa->pa_tag; 324 sc->as_id = pa->pa_id; 325 326 /* 327 * Work out an upper bound for agp memory allocation. This 328 * uses a heurisitc table from the Linux driver. 329 */ 330 memsize = ptoa(physmem) >> 20; 331 for (i = 0; i < agp_max_size; i++) { 332 if (memsize <= agp_max[i][0]) 333 break; 334 } 335 if (i == agp_max_size) 336 i = agp_max_size - 1; 337 sc->as_maxmem = agp_max[i][1] << 20U; 338 339 /* 340 * The mutex is used to prevent re-entry to 341 * agp_generic_bind_memory() since that function can sleep. 342 */ 343 mutex_init(&sc->as_mtx, MUTEX_DEFAULT, IPL_NONE); 344 345 TAILQ_INIT(&sc->as_memory); 346 347 ret = (*ap->ap_attach)(parent, self, pa); 348 if (ret == 0) 349 aprint_normal(": aperture at 0x%lx, size 0x%lx\n", 350 (unsigned long)sc->as_apaddr, 351 (unsigned long)AGP_GET_APERTURE(sc)); 352 else 353 sc->as_chipc = NULL; 354 355 if (!device_pmf_is_registered(self)) { 356 if (!pmf_device_register(self, NULL, agp_resume)) 357 aprint_error_dev(self, "couldn't establish power handler\n"); 358 } 359 360 unit = device_unit(self); 361 device_register_name(makedev(major, unit), self, true, DEV_VIDEO, 362 "agp%d", unit); 363 } 364 365 CFATTACH_DECL(agp, sizeof(struct agp_softc), 366 agpmatch, agpattach, NULL, NULL); 367 368 int 369 agp_map_aperture(struct pci_attach_args *pa, struct agp_softc *sc, int reg) 370 { 371 /* 372 * Find the aperture. Don't map it (yet), this would 373 * eat KVA. 374 */ 375 if (pci_mapreg_info(pa->pa_pc, pa->pa_tag, reg, 376 PCI_MAPREG_TYPE_MEM, &sc->as_apaddr, &sc->as_apsize, 377 &sc->as_apflags) != 0) 378 return ENXIO; 379 380 sc->as_apt = pa->pa_memt; 381 382 return 0; 383 } 384 385 struct agp_gatt * 386 agp_alloc_gatt(struct agp_softc *sc) 387 { 388 u_int32_t apsize = AGP_GET_APERTURE(sc); 389 u_int32_t entries = apsize >> AGP_PAGE_SHIFT; 390 struct agp_gatt *gatt; 391 void *virtual; 392 int dummyseg; 393 394 gatt = malloc(sizeof(struct agp_gatt), M_AGP, M_NOWAIT); 395 if (!gatt) 396 return NULL; 397 gatt->ag_entries = entries; 398 399 if (agp_alloc_dmamem(sc->as_dmat, entries * sizeof(u_int32_t), 400 0, &gatt->ag_dmamap, &virtual, &gatt->ag_physical, 401 &gatt->ag_dmaseg, 1, &dummyseg) != 0) 402 return NULL; 403 gatt->ag_virtual = (uint32_t *)virtual; 404 405 gatt->ag_size = entries * sizeof(u_int32_t); 406 memset(gatt->ag_virtual, 0, gatt->ag_size); 407 agp_flush_cache(); 408 409 return gatt; 410 } 411 412 void 413 agp_free_gatt(struct agp_softc *sc, struct agp_gatt *gatt) 414 { 415 agp_free_dmamem(sc->as_dmat, gatt->ag_size, gatt->ag_dmamap, 416 (void *)gatt->ag_virtual, &gatt->ag_dmaseg, 1); 417 free(gatt, M_AGP); 418 } 419 420 421 int 422 agp_generic_detach(struct agp_softc *sc) 423 { 424 mutex_destroy(&sc->as_mtx); 425 agp_flush_cache(); 426 return 0; 427 } 428 429 static int 430 agpdev_match(struct pci_attach_args *pa) 431 { 432 if (PCI_CLASS(pa->pa_class) == PCI_CLASS_DISPLAY && 433 PCI_SUBCLASS(pa->pa_class) == PCI_SUBCLASS_DISPLAY_VGA) 434 if (pci_get_capability(pa->pa_pc, pa->pa_tag, PCI_CAP_AGP, 435 NULL, NULL)) 436 return 1; 437 438 return 0; 439 } 440 441 int 442 agp_generic_enable(struct agp_softc *sc, u_int32_t mode) 443 { 444 struct pci_attach_args pa; 445 pcireg_t tstatus, mstatus; 446 pcireg_t command; 447 int rq, sba, fw, rate, capoff; 448 449 if (pci_find_device(&pa, agpdev_match) == 0 || 450 pci_get_capability(pa.pa_pc, pa.pa_tag, PCI_CAP_AGP, 451 &capoff, NULL) == 0) { 452 aprint_error_dev(&sc->as_dev, "can't find display\n"); 453 return ENXIO; 454 } 455 456 tstatus = pci_conf_read(sc->as_pc, sc->as_tag, 457 sc->as_capoff + AGP_STATUS); 458 mstatus = pci_conf_read(pa.pa_pc, pa.pa_tag, 459 capoff + AGP_STATUS); 460 461 /* Set RQ to the min of mode, tstatus and mstatus */ 462 rq = AGP_MODE_GET_RQ(mode); 463 if (AGP_MODE_GET_RQ(tstatus) < rq) 464 rq = AGP_MODE_GET_RQ(tstatus); 465 if (AGP_MODE_GET_RQ(mstatus) < rq) 466 rq = AGP_MODE_GET_RQ(mstatus); 467 468 /* Set SBA if all three can deal with SBA */ 469 sba = (AGP_MODE_GET_SBA(tstatus) 470 & AGP_MODE_GET_SBA(mstatus) 471 & AGP_MODE_GET_SBA(mode)); 472 473 /* Similar for FW */ 474 fw = (AGP_MODE_GET_FW(tstatus) 475 & AGP_MODE_GET_FW(mstatus) 476 & AGP_MODE_GET_FW(mode)); 477 478 /* Figure out the max rate */ 479 rate = (AGP_MODE_GET_RATE(tstatus) 480 & AGP_MODE_GET_RATE(mstatus) 481 & AGP_MODE_GET_RATE(mode)); 482 if (rate & AGP_MODE_RATE_4x) 483 rate = AGP_MODE_RATE_4x; 484 else if (rate & AGP_MODE_RATE_2x) 485 rate = AGP_MODE_RATE_2x; 486 else 487 rate = AGP_MODE_RATE_1x; 488 489 /* Construct the new mode word and tell the hardware */ 490 command = AGP_MODE_SET_RQ(0, rq); 491 command = AGP_MODE_SET_SBA(command, sba); 492 command = AGP_MODE_SET_FW(command, fw); 493 command = AGP_MODE_SET_RATE(command, rate); 494 command = AGP_MODE_SET_AGP(command, 1); 495 pci_conf_write(sc->as_pc, sc->as_tag, 496 sc->as_capoff + AGP_COMMAND, command); 497 pci_conf_write(pa.pa_pc, pa.pa_tag, capoff + AGP_COMMAND, command); 498 499 return 0; 500 } 501 502 struct agp_memory * 503 agp_generic_alloc_memory(struct agp_softc *sc, int type, vsize_t size) 504 { 505 struct agp_memory *mem; 506 507 if ((size & (AGP_PAGE_SIZE - 1)) != 0) 508 return 0; 509 510 if (sc->as_allocated + size > sc->as_maxmem) 511 return 0; 512 513 if (type != 0) { 514 printf("agp_generic_alloc_memory: unsupported type %d\n", 515 type); 516 return 0; 517 } 518 519 mem = malloc(sizeof *mem, M_AGP, M_WAITOK); 520 if (mem == NULL) 521 return NULL; 522 523 if (bus_dmamap_create(sc->as_dmat, size, size / PAGE_SIZE + 1, 524 size, 0, BUS_DMA_NOWAIT, &mem->am_dmamap) != 0) { 525 free(mem, M_AGP); 526 return NULL; 527 } 528 529 mem->am_id = sc->as_nextid++; 530 mem->am_size = size; 531 mem->am_type = 0; 532 mem->am_physical = 0; 533 mem->am_offset = 0; 534 mem->am_is_bound = 0; 535 TAILQ_INSERT_TAIL(&sc->as_memory, mem, am_link); 536 sc->as_allocated += size; 537 538 return mem; 539 } 540 541 int 542 agp_generic_free_memory(struct agp_softc *sc, struct agp_memory *mem) 543 { 544 if (mem->am_is_bound) 545 return EBUSY; 546 547 sc->as_allocated -= mem->am_size; 548 TAILQ_REMOVE(&sc->as_memory, mem, am_link); 549 bus_dmamap_destroy(sc->as_dmat, mem->am_dmamap); 550 free(mem, M_AGP); 551 return 0; 552 } 553 554 int 555 agp_generic_bind_memory(struct agp_softc *sc, struct agp_memory *mem, 556 off_t offset) 557 { 558 off_t i, k; 559 bus_size_t done, j; 560 int error; 561 bus_dma_segment_t *segs, *seg; 562 bus_addr_t pa; 563 int contigpages, nseg; 564 565 mutex_enter(&sc->as_mtx); 566 567 if (mem->am_is_bound) { 568 aprint_error_dev(&sc->as_dev, "memory already bound\n"); 569 mutex_exit(&sc->as_mtx); 570 return EINVAL; 571 } 572 573 if (offset < 0 574 || (offset & (AGP_PAGE_SIZE - 1)) != 0 575 || offset + mem->am_size > AGP_GET_APERTURE(sc)) { 576 aprint_error_dev(&sc->as_dev, "binding memory at bad offset %#lx\n", 577 (unsigned long) offset); 578 mutex_exit(&sc->as_mtx); 579 return EINVAL; 580 } 581 582 /* 583 * XXXfvdl 584 * The memory here needs to be directly accessable from the 585 * AGP video card, so it should be allocated using bus_dma. 586 * However, it need not be contiguous, since individual pages 587 * are translated using the GATT. 588 * 589 * Using a large chunk of contiguous memory may get in the way 590 * of other subsystems that may need one, so we try to be friendly 591 * and ask for allocation in chunks of a minimum of 8 pages 592 * of contiguous memory on average, falling back to 4, 2 and 1 593 * if really needed. Larger chunks are preferred, since allocating 594 * a bus_dma_segment per page would be overkill. 595 */ 596 597 for (contigpages = 8; contigpages > 0; contigpages >>= 1) { 598 nseg = (mem->am_size / (contigpages * PAGE_SIZE)) + 1; 599 segs = malloc(nseg * sizeof *segs, M_AGP, M_WAITOK); 600 if (segs == NULL) { 601 mutex_exit(&sc->as_mtx); 602 return ENOMEM; 603 } 604 if (bus_dmamem_alloc(sc->as_dmat, mem->am_size, PAGE_SIZE, 0, 605 segs, nseg, &mem->am_nseg, 606 contigpages > 1 ? 607 BUS_DMA_NOWAIT : BUS_DMA_WAITOK) != 0) { 608 free(segs, M_AGP); 609 continue; 610 } 611 if (bus_dmamem_map(sc->as_dmat, segs, mem->am_nseg, 612 mem->am_size, &mem->am_virtual, BUS_DMA_WAITOK) != 0) { 613 bus_dmamem_free(sc->as_dmat, segs, mem->am_nseg); 614 free(segs, M_AGP); 615 continue; 616 } 617 if (bus_dmamap_load(sc->as_dmat, mem->am_dmamap, 618 mem->am_virtual, mem->am_size, NULL, BUS_DMA_WAITOK) != 0) { 619 bus_dmamem_unmap(sc->as_dmat, mem->am_virtual, 620 mem->am_size); 621 bus_dmamem_free(sc->as_dmat, segs, mem->am_nseg); 622 free(segs, M_AGP); 623 continue; 624 } 625 mem->am_dmaseg = segs; 626 break; 627 } 628 629 if (contigpages == 0) { 630 mutex_exit(&sc->as_mtx); 631 return ENOMEM; 632 } 633 634 635 /* 636 * Bind the individual pages and flush the chipset's 637 * TLB. 638 */ 639 done = 0; 640 for (i = 0; i < mem->am_dmamap->dm_nsegs; i++) { 641 seg = &mem->am_dmamap->dm_segs[i]; 642 /* 643 * Install entries in the GATT, making sure that if 644 * AGP_PAGE_SIZE < PAGE_SIZE and mem->am_size is not 645 * aligned to PAGE_SIZE, we don't modify too many GATT 646 * entries. 647 */ 648 for (j = 0; j < seg->ds_len && (done + j) < mem->am_size; 649 j += AGP_PAGE_SIZE) { 650 pa = seg->ds_addr + j; 651 AGP_DPF(("binding offset %#lx to pa %#lx\n", 652 (unsigned long)(offset + done + j), 653 (unsigned long)pa)); 654 error = AGP_BIND_PAGE(sc, offset + done + j, pa); 655 if (error) { 656 /* 657 * Bail out. Reverse all the mappings 658 * and unwire the pages. 659 */ 660 for (k = 0; k < done + j; k += AGP_PAGE_SIZE) 661 AGP_UNBIND_PAGE(sc, offset + k); 662 663 bus_dmamap_unload(sc->as_dmat, mem->am_dmamap); 664 bus_dmamem_unmap(sc->as_dmat, mem->am_virtual, 665 mem->am_size); 666 bus_dmamem_free(sc->as_dmat, mem->am_dmaseg, 667 mem->am_nseg); 668 free(mem->am_dmaseg, M_AGP); 669 mutex_exit(&sc->as_mtx); 670 return error; 671 } 672 } 673 done += seg->ds_len; 674 } 675 676 /* 677 * Flush the CPU cache since we are providing a new mapping 678 * for these pages. 679 */ 680 agp_flush_cache(); 681 682 /* 683 * Make sure the chipset gets the new mappings. 684 */ 685 AGP_FLUSH_TLB(sc); 686 687 mem->am_offset = offset; 688 mem->am_is_bound = 1; 689 690 mutex_exit(&sc->as_mtx); 691 692 return 0; 693 } 694 695 int 696 agp_generic_unbind_memory(struct agp_softc *sc, struct agp_memory *mem) 697 { 698 int i; 699 700 mutex_enter(&sc->as_mtx); 701 702 if (!mem->am_is_bound) { 703 aprint_error_dev(&sc->as_dev, "memory is not bound\n"); 704 mutex_exit(&sc->as_mtx); 705 return EINVAL; 706 } 707 708 709 /* 710 * Unbind the individual pages and flush the chipset's 711 * TLB. Unwire the pages so they can be swapped. 712 */ 713 for (i = 0; i < mem->am_size; i += AGP_PAGE_SIZE) 714 AGP_UNBIND_PAGE(sc, mem->am_offset + i); 715 716 agp_flush_cache(); 717 AGP_FLUSH_TLB(sc); 718 719 bus_dmamap_unload(sc->as_dmat, mem->am_dmamap); 720 bus_dmamem_unmap(sc->as_dmat, mem->am_virtual, mem->am_size); 721 bus_dmamem_free(sc->as_dmat, mem->am_dmaseg, mem->am_nseg); 722 723 free(mem->am_dmaseg, M_AGP); 724 725 mem->am_offset = 0; 726 mem->am_is_bound = 0; 727 728 mutex_exit(&sc->as_mtx); 729 730 return 0; 731 } 732 733 /* Helper functions for implementing user/kernel api */ 734 735 static int 736 agp_acquire_helper(struct agp_softc *sc, enum agp_acquire_state state) 737 { 738 if (sc->as_state != AGP_ACQUIRE_FREE) 739 return EBUSY; 740 sc->as_state = state; 741 742 return 0; 743 } 744 745 static int 746 agp_release_helper(struct agp_softc *sc, enum agp_acquire_state state) 747 { 748 749 if (sc->as_state == AGP_ACQUIRE_FREE) 750 return 0; 751 752 if (sc->as_state != state) 753 return EBUSY; 754 755 sc->as_state = AGP_ACQUIRE_FREE; 756 return 0; 757 } 758 759 static struct agp_memory * 760 agp_find_memory(struct agp_softc *sc, int id) 761 { 762 struct agp_memory *mem; 763 764 AGP_DPF(("searching for memory block %d\n", id)); 765 TAILQ_FOREACH(mem, &sc->as_memory, am_link) { 766 AGP_DPF(("considering memory block %d\n", mem->am_id)); 767 if (mem->am_id == id) 768 return mem; 769 } 770 return 0; 771 } 772 773 /* Implementation of the userland ioctl api */ 774 775 static int 776 agp_info_user(struct agp_softc *sc, agp_info *info) 777 { 778 memset(info, 0, sizeof *info); 779 info->bridge_id = sc->as_id; 780 if (sc->as_capoff != 0) 781 info->agp_mode = pci_conf_read(sc->as_pc, sc->as_tag, 782 sc->as_capoff + AGP_STATUS); 783 else 784 info->agp_mode = 0; /* i810 doesn't have real AGP */ 785 info->aper_base = sc->as_apaddr; 786 info->aper_size = AGP_GET_APERTURE(sc) >> 20; 787 info->pg_total = info->pg_system = sc->as_maxmem >> AGP_PAGE_SHIFT; 788 info->pg_used = sc->as_allocated >> AGP_PAGE_SHIFT; 789 790 return 0; 791 } 792 793 static int 794 agp_setup_user(struct agp_softc *sc, agp_setup *setup) 795 { 796 return AGP_ENABLE(sc, setup->agp_mode); 797 } 798 799 static int 800 agp_allocate_user(struct agp_softc *sc, agp_allocate *alloc) 801 { 802 struct agp_memory *mem; 803 804 mem = AGP_ALLOC_MEMORY(sc, 805 alloc->type, 806 alloc->pg_count << AGP_PAGE_SHIFT); 807 if (mem) { 808 alloc->key = mem->am_id; 809 alloc->physical = mem->am_physical; 810 return 0; 811 } else { 812 return ENOMEM; 813 } 814 } 815 816 static int 817 agp_deallocate_user(struct agp_softc *sc, int id) 818 { 819 struct agp_memory *mem = agp_find_memory(sc, id); 820 821 if (mem) { 822 AGP_FREE_MEMORY(sc, mem); 823 return 0; 824 } else { 825 return ENOENT; 826 } 827 } 828 829 static int 830 agp_bind_user(struct agp_softc *sc, agp_bind *bind) 831 { 832 struct agp_memory *mem = agp_find_memory(sc, bind->key); 833 834 if (!mem) 835 return ENOENT; 836 837 return AGP_BIND_MEMORY(sc, mem, bind->pg_start << AGP_PAGE_SHIFT); 838 } 839 840 static int 841 agp_unbind_user(struct agp_softc *sc, agp_unbind *unbind) 842 { 843 struct agp_memory *mem = agp_find_memory(sc, unbind->key); 844 845 if (!mem) 846 return ENOENT; 847 848 return AGP_UNBIND_MEMORY(sc, mem); 849 } 850 851 static int 852 agpopen(dev_t dev, int oflags, int devtype, 853 struct lwp *l) 854 { 855 struct agp_softc *sc = device_lookup(&agp_cd, AGPUNIT(dev)); 856 857 if (sc == NULL) 858 return ENXIO; 859 860 if (sc->as_chipc == NULL) 861 return ENXIO; 862 863 if (!sc->as_isopen) 864 sc->as_isopen = 1; 865 else 866 return EBUSY; 867 868 return 0; 869 } 870 871 static int 872 agpclose(dev_t dev, int fflag, int devtype, 873 struct lwp *l) 874 { 875 struct agp_softc *sc = device_lookup(&agp_cd, AGPUNIT(dev)); 876 struct agp_memory *mem; 877 878 /* 879 * Clear the GATT and force release on last close 880 */ 881 if (sc->as_state == AGP_ACQUIRE_USER) { 882 while ((mem = TAILQ_FIRST(&sc->as_memory))) { 883 if (mem->am_is_bound) { 884 printf("agpclose: mem %d is bound\n", 885 mem->am_id); 886 AGP_UNBIND_MEMORY(sc, mem); 887 } 888 /* 889 * XXX it is not documented, but if the protocol allows 890 * allocate->acquire->bind, it would be possible that 891 * memory ranges are allocated by the kernel here, 892 * which we shouldn't free. We'd have to keep track of 893 * the memory range's owner. 894 * The kernel API is unsed yet, so we get away with 895 * freeing all. 896 */ 897 AGP_FREE_MEMORY(sc, mem); 898 } 899 agp_release_helper(sc, AGP_ACQUIRE_USER); 900 } 901 sc->as_isopen = 0; 902 903 return 0; 904 } 905 906 static int 907 agpioctl(dev_t dev, u_long cmd, void *data, int fflag, struct lwp *l) 908 { 909 struct agp_softc *sc = device_lookup(&agp_cd, AGPUNIT(dev)); 910 911 if (sc == NULL) 912 return ENODEV; 913 914 if ((fflag & FWRITE) == 0 && cmd != AGPIOC_INFO) 915 return EPERM; 916 917 switch (cmd) { 918 case AGPIOC_INFO: 919 return agp_info_user(sc, (agp_info *) data); 920 921 case AGPIOC_ACQUIRE: 922 return agp_acquire_helper(sc, AGP_ACQUIRE_USER); 923 924 case AGPIOC_RELEASE: 925 return agp_release_helper(sc, AGP_ACQUIRE_USER); 926 927 case AGPIOC_SETUP: 928 return agp_setup_user(sc, (agp_setup *)data); 929 930 case AGPIOC_ALLOCATE: 931 return agp_allocate_user(sc, (agp_allocate *)data); 932 933 case AGPIOC_DEALLOCATE: 934 return agp_deallocate_user(sc, *(int *) data); 935 936 case AGPIOC_BIND: 937 return agp_bind_user(sc, (agp_bind *)data); 938 939 case AGPIOC_UNBIND: 940 return agp_unbind_user(sc, (agp_unbind *)data); 941 942 } 943 944 return EINVAL; 945 } 946 947 static paddr_t 948 agpmmap(dev_t dev, off_t offset, int prot) 949 { 950 struct agp_softc *sc = device_lookup(&agp_cd, AGPUNIT(dev)); 951 952 if (offset > AGP_GET_APERTURE(sc)) 953 return -1; 954 955 return (bus_space_mmap(sc->as_apt, sc->as_apaddr, offset, prot, 956 BUS_SPACE_MAP_LINEAR)); 957 } 958 959 /* Implementation of the kernel api */ 960 961 void * 962 agp_find_device(int unit) 963 { 964 return device_lookup(&agp_cd, unit); 965 } 966 967 enum agp_acquire_state 968 agp_state(void *devcookie) 969 { 970 struct agp_softc *sc = devcookie; 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 *agp_alloc_memory(void *dev, int type, vsize_t bytes) 1008 { 1009 struct agp_softc *sc = dev; 1010 1011 return (void *)AGP_ALLOC_MEMORY(sc, type, bytes); 1012 } 1013 1014 void agp_free_memory(void *dev, void *handle) 1015 { 1016 struct agp_softc *sc = dev; 1017 struct agp_memory *mem = (struct agp_memory *) handle; 1018 AGP_FREE_MEMORY(sc, mem); 1019 } 1020 1021 int agp_bind_memory(void *dev, void *handle, off_t offset) 1022 { 1023 struct agp_softc *sc = dev; 1024 struct agp_memory *mem = (struct agp_memory *) handle; 1025 1026 return AGP_BIND_MEMORY(sc, mem, offset); 1027 } 1028 1029 int agp_unbind_memory(void *dev, void *handle) 1030 { 1031 struct agp_softc *sc = dev; 1032 struct agp_memory *mem = (struct agp_memory *) handle; 1033 1034 return AGP_UNBIND_MEMORY(sc, mem); 1035 } 1036 1037 void agp_memory_info(void *dev, void *handle, 1038 struct agp_memory_info *mi) 1039 { 1040 struct agp_memory *mem = (struct agp_memory *) handle; 1041 1042 mi->ami_size = mem->am_size; 1043 mi->ami_physical = mem->am_physical; 1044 mi->ami_offset = mem->am_offset; 1045 mi->ami_is_bound = mem->am_is_bound; 1046 } 1047 1048 int 1049 agp_alloc_dmamem(bus_dma_tag_t tag, size_t size, int flags, 1050 bus_dmamap_t *mapp, void **vaddr, bus_addr_t *baddr, 1051 bus_dma_segment_t *seg, int nseg, int *rseg) 1052 1053 { 1054 int error, level = 0; 1055 1056 if ((error = bus_dmamem_alloc(tag, size, PAGE_SIZE, 0, 1057 seg, nseg, rseg, BUS_DMA_NOWAIT)) != 0) 1058 goto out; 1059 level++; 1060 1061 if ((error = bus_dmamem_map(tag, seg, *rseg, size, vaddr, 1062 BUS_DMA_NOWAIT | flags)) != 0) 1063 goto out; 1064 level++; 1065 1066 if ((error = bus_dmamap_create(tag, size, *rseg, size, 0, 1067 BUS_DMA_NOWAIT, mapp)) != 0) 1068 goto out; 1069 level++; 1070 1071 if ((error = bus_dmamap_load(tag, *mapp, *vaddr, size, NULL, 1072 BUS_DMA_NOWAIT)) != 0) 1073 goto out; 1074 1075 *baddr = (*mapp)->dm_segs[0].ds_addr; 1076 1077 return 0; 1078 out: 1079 switch (level) { 1080 case 3: 1081 bus_dmamap_destroy(tag, *mapp); 1082 /* FALLTHROUGH */ 1083 case 2: 1084 bus_dmamem_unmap(tag, *vaddr, size); 1085 /* FALLTHROUGH */ 1086 case 1: 1087 bus_dmamem_free(tag, seg, *rseg); 1088 break; 1089 default: 1090 break; 1091 } 1092 1093 return error; 1094 } 1095 1096 void 1097 agp_free_dmamem(bus_dma_tag_t tag, size_t size, bus_dmamap_t map, 1098 void *vaddr, bus_dma_segment_t *seg, int nseg) 1099 { 1100 1101 bus_dmamap_unload(tag, map); 1102 bus_dmamap_destroy(tag, map); 1103 bus_dmamem_unmap(tag, vaddr, size); 1104 bus_dmamem_free(tag, seg, nseg); 1105 } 1106 1107 static bool 1108 agp_resume(device_t dv PMF_FN_ARGS) 1109 { 1110 agp_flush_cache(); 1111 1112 return true; 1113 } 1114
Indexes created Tue Oct 14 06:10:07 GMT 2025