agp.c revision 1.48
1 /* $NetBSD: agp.c,v 1.48 2007/08/15 02:26:13 markd 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 1.48 2007/08/15 02:26:13 markd 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 <machine/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 *); 106 107 #include "agp_ali.h" 108 #include "agp_amd.h" 109 #include "agp_i810.h" 110 #include "agp_intel.h" 111 #include "agp_sis.h" 112 #include "agp_via.h" 113 #include "agp_amd64.h" 114 115 const struct agp_product { 116 uint32_t ap_vendor; 117 uint32_t ap_product; 118 int (*ap_match)(const struct pci_attach_args *); 119 int (*ap_attach)(struct device *, struct device *, void *); 120 } agp_products[] = { 121 #if NAGP_ALI > 0 122 { PCI_VENDOR_ALI, -1, 123 NULL, agp_ali_attach }, 124 #endif 125 126 #if NAGP_AMD > 0 127 { PCI_VENDOR_AMD, -1, 128 agp_amd_match, agp_amd_attach }, 129 #endif 130 131 #if NAGP_I810 > 0 132 { PCI_VENDOR_INTEL, PCI_PRODUCT_INTEL_82810_MCH, 133 NULL, agp_i810_attach }, 134 { PCI_VENDOR_INTEL, PCI_PRODUCT_INTEL_82810_DC100_MCH, 135 NULL, agp_i810_attach }, 136 { PCI_VENDOR_INTEL, PCI_PRODUCT_INTEL_82810E_MCH, 137 NULL, agp_i810_attach }, 138 { PCI_VENDOR_INTEL, PCI_PRODUCT_INTEL_82815_FULL_HUB, 139 NULL, agp_i810_attach }, 140 { PCI_VENDOR_INTEL, PCI_PRODUCT_INTEL_82840_HB, 141 NULL, agp_i810_attach }, 142 { PCI_VENDOR_INTEL, PCI_PRODUCT_INTEL_82830MP_IO_1, 143 NULL, agp_i810_attach }, 144 { PCI_VENDOR_INTEL, PCI_PRODUCT_INTEL_82845G_DRAM, 145 NULL, agp_i810_attach }, 146 { PCI_VENDOR_INTEL, PCI_PRODUCT_INTEL_82855GM_MCH, 147 NULL, agp_i810_attach }, 148 { PCI_VENDOR_INTEL, PCI_PRODUCT_INTEL_82865_HB, 149 NULL, agp_i810_attach }, 150 { PCI_VENDOR_INTEL, PCI_PRODUCT_INTEL_82915G_HB, 151 NULL, agp_i810_attach }, 152 { PCI_VENDOR_INTEL, PCI_PRODUCT_INTEL_82915GM_HB, 153 NULL, agp_i810_attach }, 154 { PCI_VENDOR_INTEL, PCI_PRODUCT_INTEL_82945P_MCH, 155 NULL, agp_i810_attach }, 156 { PCI_VENDOR_INTEL, PCI_PRODUCT_INTEL_82945GM_HB, 157 NULL, agp_i810_attach }, 158 { PCI_VENDOR_INTEL, PCI_PRODUCT_INTEL_82965Q_HB, 159 NULL, agp_i810_attach }, 160 #endif 161 162 #if NAGP_INTEL > 0 163 { PCI_VENDOR_INTEL, -1, 164 NULL, agp_intel_attach }, 165 #endif 166 167 #if NAGP_SIS > 0 168 { PCI_VENDOR_SIS, -1, 169 NULL, agp_sis_attach }, 170 #endif 171 172 #if NAGP_VIA > 0 173 { PCI_VENDOR_VIATECH, -1, 174 NULL, agp_via_attach }, 175 #endif 176 177 #if NAGP_AMD64 > 0 178 { PCI_VENDOR_AMD, PCI_PRODUCT_AMD_AGP8151_DEV, 179 agp_amd64_match, agp_amd64_attach }, 180 { PCI_VENDOR_SIS, PCI_PRODUCT_SIS_755, 181 agp_amd64_match, agp_amd64_attach }, 182 { PCI_VENDOR_SIS, PCI_PRODUCT_SIS_760, 183 agp_amd64_match, agp_amd64_attach }, 184 { PCI_VENDOR_NVIDIA, PCI_PRODUCT_NVIDIA_NFORCE3_PCHB, 185 agp_amd64_match, agp_amd64_attach }, 186 { PCI_VENDOR_NVIDIA, PCI_PRODUCT_NVIDIA_NFORCE3_250_PCHB, 187 agp_amd64_match, agp_amd64_attach }, 188 { PCI_VENDOR_VIATECH, PCI_PRODUCT_VIATECH_K8M800_0, 189 agp_amd64_match, agp_amd64_attach }, 190 { PCI_VENDOR_VIATECH, PCI_PRODUCT_VIATECH_K8T890_0, 191 agp_amd64_match, agp_amd64_attach }, 192 { PCI_VENDOR_VIATECH, PCI_PRODUCT_VIATECH_K8HTB_0, 193 agp_amd64_match, agp_amd64_attach }, 194 { PCI_VENDOR_VIATECH, PCI_PRODUCT_VIATECH_K8HTB, 195 agp_amd64_match, agp_amd64_attach }, 196 #endif 197 198 { 0, 0, 199 NULL, NULL }, 200 }; 201 202 static const struct agp_product * 203 agp_lookup(const struct pci_attach_args *pa) 204 { 205 const struct agp_product *ap; 206 207 /* First find the vendor. */ 208 for (ap = agp_products; ap->ap_attach != NULL; ap++) { 209 if (PCI_VENDOR(pa->pa_id) == ap->ap_vendor) 210 break; 211 } 212 213 if (ap->ap_attach == NULL) 214 return (NULL); 215 216 /* Now find the product within the vendor's domain. */ 217 for (; ap->ap_attach != NULL; ap++) { 218 if (PCI_VENDOR(pa->pa_id) != ap->ap_vendor) { 219 /* Ran out of this vendor's section of the table. */ 220 return (NULL); 221 } 222 if (ap->ap_product == PCI_PRODUCT(pa->pa_id)) { 223 /* Exact match. */ 224 break; 225 } 226 if (ap->ap_product == (uint32_t) -1) { 227 /* Wildcard match. */ 228 break; 229 } 230 } 231 232 if (ap->ap_attach == NULL) 233 return (NULL); 234 235 /* Now let the product-specific driver filter the match. */ 236 if (ap->ap_match != NULL && (*ap->ap_match)(pa) == 0) 237 return (NULL); 238 239 return (ap); 240 } 241 242 static int 243 agpmatch(struct device *parent, struct cfdata *match, 244 void *aux) 245 { 246 struct agpbus_attach_args *apa = aux; 247 struct pci_attach_args *pa = &apa->apa_pci_args; 248 249 if (agp_lookup(pa) == NULL) 250 return (0); 251 252 return (1); 253 } 254 255 static const int agp_max[][2] = { 256 {0, 0}, 257 {32, 4}, 258 {64, 28}, 259 {128, 96}, 260 {256, 204}, 261 {512, 440}, 262 {1024, 942}, 263 {2048, 1920}, 264 {4096, 3932} 265 }; 266 #define agp_max_size (sizeof(agp_max) / sizeof(agp_max[0])) 267 268 static void 269 agpattach(struct device *parent, struct device *self, void *aux) 270 { 271 struct agpbus_attach_args *apa = aux; 272 struct pci_attach_args *pa = &apa->apa_pci_args; 273 struct agp_softc *sc = (void *)self; 274 const struct agp_product *ap; 275 int memsize, i, ret; 276 277 ap = agp_lookup(pa); 278 if (ap == NULL) { 279 printf("\n"); 280 panic("agpattach: impossible"); 281 } 282 283 aprint_naive(": AGP controller\n"); 284 285 sc->as_dmat = pa->pa_dmat; 286 sc->as_pc = pa->pa_pc; 287 sc->as_tag = pa->pa_tag; 288 sc->as_id = pa->pa_id; 289 290 /* 291 * Work out an upper bound for agp memory allocation. This 292 * uses a heurisitc table from the Linux driver. 293 */ 294 memsize = ptoa(physmem) >> 20; 295 for (i = 0; i < agp_max_size; i++) { 296 if (memsize <= agp_max[i][0]) 297 break; 298 } 299 if (i == agp_max_size) 300 i = agp_max_size - 1; 301 sc->as_maxmem = agp_max[i][1] << 20U; 302 303 /* 304 * The mutex is used to prevent re-entry to 305 * agp_generic_bind_memory() since that function can sleep. 306 */ 307 mutex_init(&sc->as_mtx, MUTEX_DRIVER, IPL_NONE); 308 309 TAILQ_INIT(&sc->as_memory); 310 311 ret = (*ap->ap_attach)(parent, self, pa); 312 if (ret == 0) 313 aprint_normal(": aperture at 0x%lx, size 0x%lx\n", 314 (unsigned long)sc->as_apaddr, 315 (unsigned long)AGP_GET_APERTURE(sc)); 316 else 317 sc->as_chipc = NULL; 318 } 319 320 CFATTACH_DECL(agp, sizeof(struct agp_softc), 321 agpmatch, agpattach, NULL, NULL); 322 323 int 324 agp_map_aperture(struct pci_attach_args *pa, struct agp_softc *sc, int reg) 325 { 326 /* 327 * Find the aperture. Don't map it (yet), this would 328 * eat KVA. 329 */ 330 if (pci_mapreg_info(pa->pa_pc, pa->pa_tag, reg, 331 PCI_MAPREG_TYPE_MEM, &sc->as_apaddr, &sc->as_apsize, 332 &sc->as_apflags) != 0) 333 return ENXIO; 334 335 sc->as_apt = pa->pa_memt; 336 337 return 0; 338 } 339 340 struct agp_gatt * 341 agp_alloc_gatt(struct agp_softc *sc) 342 { 343 u_int32_t apsize = AGP_GET_APERTURE(sc); 344 u_int32_t entries = apsize >> AGP_PAGE_SHIFT; 345 struct agp_gatt *gatt; 346 void *virtual; 347 int dummyseg; 348 349 gatt = malloc(sizeof(struct agp_gatt), M_AGP, M_NOWAIT); 350 if (!gatt) 351 return NULL; 352 gatt->ag_entries = entries; 353 354 if (agp_alloc_dmamem(sc->as_dmat, entries * sizeof(u_int32_t), 355 0, &gatt->ag_dmamap, &virtual, &gatt->ag_physical, 356 &gatt->ag_dmaseg, 1, &dummyseg) != 0) 357 return NULL; 358 gatt->ag_virtual = (uint32_t *)virtual; 359 360 gatt->ag_size = entries * sizeof(u_int32_t); 361 memset(gatt->ag_virtual, 0, gatt->ag_size); 362 agp_flush_cache(); 363 364 return gatt; 365 } 366 367 void 368 agp_free_gatt(struct agp_softc *sc, struct agp_gatt *gatt) 369 { 370 agp_free_dmamem(sc->as_dmat, gatt->ag_size, gatt->ag_dmamap, 371 (void *)gatt->ag_virtual, &gatt->ag_dmaseg, 1); 372 free(gatt, M_AGP); 373 } 374 375 376 int 377 agp_generic_detach(struct agp_softc *sc) 378 { 379 mutex_destroy(&sc->as_mtx); 380 agp_flush_cache(); 381 return 0; 382 } 383 384 static int 385 agpdev_match(struct pci_attach_args *pa) 386 { 387 if (PCI_CLASS(pa->pa_class) == PCI_CLASS_DISPLAY && 388 PCI_SUBCLASS(pa->pa_class) == PCI_SUBCLASS_DISPLAY_VGA) 389 if (pci_get_capability(pa->pa_pc, pa->pa_tag, PCI_CAP_AGP, 390 NULL, NULL)) 391 return 1; 392 393 return 0; 394 } 395 396 int 397 agp_generic_enable(struct agp_softc *sc, u_int32_t mode) 398 { 399 struct pci_attach_args pa; 400 pcireg_t tstatus, mstatus; 401 pcireg_t command; 402 int rq, sba, fw, rate, capoff; 403 404 if (pci_find_device(&pa, agpdev_match) == 0 || 405 pci_get_capability(pa.pa_pc, pa.pa_tag, PCI_CAP_AGP, 406 &capoff, NULL) == 0) { 407 printf("%s: can't find display\n", sc->as_dev.dv_xname); 408 return ENXIO; 409 } 410 411 tstatus = pci_conf_read(sc->as_pc, sc->as_tag, 412 sc->as_capoff + AGP_STATUS); 413 mstatus = pci_conf_read(pa.pa_pc, pa.pa_tag, 414 capoff + AGP_STATUS); 415 416 /* Set RQ to the min of mode, tstatus and mstatus */ 417 rq = AGP_MODE_GET_RQ(mode); 418 if (AGP_MODE_GET_RQ(tstatus) < rq) 419 rq = AGP_MODE_GET_RQ(tstatus); 420 if (AGP_MODE_GET_RQ(mstatus) < rq) 421 rq = AGP_MODE_GET_RQ(mstatus); 422 423 /* Set SBA if all three can deal with SBA */ 424 sba = (AGP_MODE_GET_SBA(tstatus) 425 & AGP_MODE_GET_SBA(mstatus) 426 & AGP_MODE_GET_SBA(mode)); 427 428 /* Similar for FW */ 429 fw = (AGP_MODE_GET_FW(tstatus) 430 & AGP_MODE_GET_FW(mstatus) 431 & AGP_MODE_GET_FW(mode)); 432 433 /* Figure out the max rate */ 434 rate = (AGP_MODE_GET_RATE(tstatus) 435 & AGP_MODE_GET_RATE(mstatus) 436 & AGP_MODE_GET_RATE(mode)); 437 if (rate & AGP_MODE_RATE_4x) 438 rate = AGP_MODE_RATE_4x; 439 else if (rate & AGP_MODE_RATE_2x) 440 rate = AGP_MODE_RATE_2x; 441 else 442 rate = AGP_MODE_RATE_1x; 443 444 /* Construct the new mode word and tell the hardware */ 445 command = AGP_MODE_SET_RQ(0, rq); 446 command = AGP_MODE_SET_SBA(command, sba); 447 command = AGP_MODE_SET_FW(command, fw); 448 command = AGP_MODE_SET_RATE(command, rate); 449 command = AGP_MODE_SET_AGP(command, 1); 450 pci_conf_write(sc->as_pc, sc->as_tag, 451 sc->as_capoff + AGP_COMMAND, command); 452 pci_conf_write(pa.pa_pc, pa.pa_tag, capoff + AGP_COMMAND, command); 453 454 return 0; 455 } 456 457 struct agp_memory * 458 agp_generic_alloc_memory(struct agp_softc *sc, int type, vsize_t size) 459 { 460 struct agp_memory *mem; 461 462 if ((size & (AGP_PAGE_SIZE - 1)) != 0) 463 return 0; 464 465 if (sc->as_allocated + size > sc->as_maxmem) 466 return 0; 467 468 if (type != 0) { 469 printf("agp_generic_alloc_memory: unsupported type %d\n", 470 type); 471 return 0; 472 } 473 474 mem = malloc(sizeof *mem, M_AGP, M_WAITOK); 475 if (mem == NULL) 476 return NULL; 477 478 if (bus_dmamap_create(sc->as_dmat, size, size / PAGE_SIZE + 1, 479 size, 0, BUS_DMA_NOWAIT, &mem->am_dmamap) != 0) { 480 free(mem, M_AGP); 481 return NULL; 482 } 483 484 mem->am_id = sc->as_nextid++; 485 mem->am_size = size; 486 mem->am_type = 0; 487 mem->am_physical = 0; 488 mem->am_offset = 0; 489 mem->am_is_bound = 0; 490 TAILQ_INSERT_TAIL(&sc->as_memory, mem, am_link); 491 sc->as_allocated += size; 492 493 return mem; 494 } 495 496 int 497 agp_generic_free_memory(struct agp_softc *sc, struct agp_memory *mem) 498 { 499 if (mem->am_is_bound) 500 return EBUSY; 501 502 sc->as_allocated -= mem->am_size; 503 TAILQ_REMOVE(&sc->as_memory, mem, am_link); 504 bus_dmamap_destroy(sc->as_dmat, mem->am_dmamap); 505 free(mem, M_AGP); 506 return 0; 507 } 508 509 int 510 agp_generic_bind_memory(struct agp_softc *sc, struct agp_memory *mem, 511 off_t offset) 512 { 513 off_t i, k; 514 bus_size_t done, j; 515 int error; 516 bus_dma_segment_t *segs, *seg; 517 bus_addr_t pa; 518 int contigpages, nseg; 519 520 mutex_enter(&sc->as_mtx); 521 522 if (mem->am_is_bound) { 523 printf("%s: memory already bound\n", sc->as_dev.dv_xname); 524 mutex_exit(&sc->as_mtx); 525 return EINVAL; 526 } 527 528 if (offset < 0 529 || (offset & (AGP_PAGE_SIZE - 1)) != 0 530 || offset + mem->am_size > AGP_GET_APERTURE(sc)) { 531 printf("%s: binding memory at bad offset %#lx\n", 532 sc->as_dev.dv_xname, (unsigned long) offset); 533 mutex_exit(&sc->as_mtx); 534 return EINVAL; 535 } 536 537 /* 538 * XXXfvdl 539 * The memory here needs to be directly accessable from the 540 * AGP video card, so it should be allocated using bus_dma. 541 * However, it need not be contiguous, since individual pages 542 * are translated using the GATT. 543 * 544 * Using a large chunk of contiguous memory may get in the way 545 * of other subsystems that may need one, so we try to be friendly 546 * and ask for allocation in chunks of a minimum of 8 pages 547 * of contiguous memory on average, falling back to 4, 2 and 1 548 * if really needed. Larger chunks are preferred, since allocating 549 * a bus_dma_segment per page would be overkill. 550 */ 551 552 for (contigpages = 8; contigpages > 0; contigpages >>= 1) { 553 nseg = (mem->am_size / (contigpages * PAGE_SIZE)) + 1; 554 segs = malloc(nseg * sizeof *segs, M_AGP, M_WAITOK); 555 if (segs == NULL) { 556 mutex_exit(&sc->as_mtx); 557 return ENOMEM; 558 } 559 if (bus_dmamem_alloc(sc->as_dmat, mem->am_size, PAGE_SIZE, 0, 560 segs, nseg, &mem->am_nseg, 561 contigpages > 1 ? 562 BUS_DMA_NOWAIT : BUS_DMA_WAITOK) != 0) { 563 free(segs, M_AGP); 564 continue; 565 } 566 if (bus_dmamem_map(sc->as_dmat, segs, mem->am_nseg, 567 mem->am_size, &mem->am_virtual, BUS_DMA_WAITOK) != 0) { 568 bus_dmamem_free(sc->as_dmat, segs, mem->am_nseg); 569 free(segs, M_AGP); 570 continue; 571 } 572 if (bus_dmamap_load(sc->as_dmat, mem->am_dmamap, 573 mem->am_virtual, mem->am_size, NULL, BUS_DMA_WAITOK) != 0) { 574 bus_dmamem_unmap(sc->as_dmat, mem->am_virtual, 575 mem->am_size); 576 bus_dmamem_free(sc->as_dmat, segs, mem->am_nseg); 577 free(segs, M_AGP); 578 continue; 579 } 580 mem->am_dmaseg = segs; 581 break; 582 } 583 584 if (contigpages == 0) { 585 mutex_exit(&sc->as_mtx); 586 return ENOMEM; 587 } 588 589 590 /* 591 * Bind the individual pages and flush the chipset's 592 * TLB. 593 */ 594 done = 0; 595 for (i = 0; i < mem->am_dmamap->dm_nsegs; i++) { 596 seg = &mem->am_dmamap->dm_segs[i]; 597 /* 598 * Install entries in the GATT, making sure that if 599 * AGP_PAGE_SIZE < PAGE_SIZE and mem->am_size is not 600 * aligned to PAGE_SIZE, we don't modify too many GATT 601 * entries. 602 */ 603 for (j = 0; j < seg->ds_len && (done + j) < mem->am_size; 604 j += AGP_PAGE_SIZE) { 605 pa = seg->ds_addr + j; 606 AGP_DPF(("binding offset %#lx to pa %#lx\n", 607 (unsigned long)(offset + done + j), 608 (unsigned long)pa)); 609 error = AGP_BIND_PAGE(sc, offset + done + j, pa); 610 if (error) { 611 /* 612 * Bail out. Reverse all the mappings 613 * and unwire the pages. 614 */ 615 for (k = 0; k < done + j; k += AGP_PAGE_SIZE) 616 AGP_UNBIND_PAGE(sc, offset + k); 617 618 bus_dmamap_unload(sc->as_dmat, mem->am_dmamap); 619 bus_dmamem_unmap(sc->as_dmat, mem->am_virtual, 620 mem->am_size); 621 bus_dmamem_free(sc->as_dmat, mem->am_dmaseg, 622 mem->am_nseg); 623 free(mem->am_dmaseg, M_AGP); 624 mutex_exit(&sc->as_mtx); 625 return error; 626 } 627 } 628 done += seg->ds_len; 629 } 630 631 /* 632 * Flush the CPU cache since we are providing a new mapping 633 * for these pages. 634 */ 635 agp_flush_cache(); 636 637 /* 638 * Make sure the chipset gets the new mappings. 639 */ 640 AGP_FLUSH_TLB(sc); 641 642 mem->am_offset = offset; 643 mem->am_is_bound = 1; 644 645 mutex_exit(&sc->as_mtx); 646 647 return 0; 648 } 649 650 int 651 agp_generic_unbind_memory(struct agp_softc *sc, struct agp_memory *mem) 652 { 653 int i; 654 655 mutex_enter(&sc->as_mtx); 656 657 if (!mem->am_is_bound) { 658 printf("%s: memory is not bound\n", sc->as_dev.dv_xname); 659 mutex_exit(&sc->as_mtx); 660 return EINVAL; 661 } 662 663 664 /* 665 * Unbind the individual pages and flush the chipset's 666 * TLB. Unwire the pages so they can be swapped. 667 */ 668 for (i = 0; i < mem->am_size; i += AGP_PAGE_SIZE) 669 AGP_UNBIND_PAGE(sc, mem->am_offset + i); 670 671 agp_flush_cache(); 672 AGP_FLUSH_TLB(sc); 673 674 bus_dmamap_unload(sc->as_dmat, mem->am_dmamap); 675 bus_dmamem_unmap(sc->as_dmat, mem->am_virtual, mem->am_size); 676 bus_dmamem_free(sc->as_dmat, mem->am_dmaseg, mem->am_nseg); 677 678 free(mem->am_dmaseg, M_AGP); 679 680 mem->am_offset = 0; 681 mem->am_is_bound = 0; 682 683 mutex_exit(&sc->as_mtx); 684 685 return 0; 686 } 687 688 /* Helper functions for implementing user/kernel api */ 689 690 static int 691 agp_acquire_helper(struct agp_softc *sc, enum agp_acquire_state state) 692 { 693 if (sc->as_state != AGP_ACQUIRE_FREE) 694 return EBUSY; 695 sc->as_state = state; 696 697 return 0; 698 } 699 700 static int 701 agp_release_helper(struct agp_softc *sc, enum agp_acquire_state state) 702 { 703 704 if (sc->as_state == AGP_ACQUIRE_FREE) 705 return 0; 706 707 if (sc->as_state != state) 708 return EBUSY; 709 710 sc->as_state = AGP_ACQUIRE_FREE; 711 return 0; 712 } 713 714 static struct agp_memory * 715 agp_find_memory(struct agp_softc *sc, int id) 716 { 717 struct agp_memory *mem; 718 719 AGP_DPF(("searching for memory block %d\n", id)); 720 TAILQ_FOREACH(mem, &sc->as_memory, am_link) { 721 AGP_DPF(("considering memory block %d\n", mem->am_id)); 722 if (mem->am_id == id) 723 return mem; 724 } 725 return 0; 726 } 727 728 /* Implementation of the userland ioctl api */ 729 730 static int 731 agp_info_user(struct agp_softc *sc, agp_info *info) 732 { 733 memset(info, 0, sizeof *info); 734 info->bridge_id = sc->as_id; 735 if (sc->as_capoff != 0) 736 info->agp_mode = pci_conf_read(sc->as_pc, sc->as_tag, 737 sc->as_capoff + AGP_STATUS); 738 else 739 info->agp_mode = 0; /* i810 doesn't have real AGP */ 740 info->aper_base = sc->as_apaddr; 741 info->aper_size = AGP_GET_APERTURE(sc) >> 20; 742 info->pg_total = info->pg_system = sc->as_maxmem >> AGP_PAGE_SHIFT; 743 info->pg_used = sc->as_allocated >> AGP_PAGE_SHIFT; 744 745 return 0; 746 } 747 748 static int 749 agp_setup_user(struct agp_softc *sc, agp_setup *setup) 750 { 751 return AGP_ENABLE(sc, setup->agp_mode); 752 } 753 754 static int 755 agp_allocate_user(struct agp_softc *sc, agp_allocate *alloc) 756 { 757 struct agp_memory *mem; 758 759 mem = AGP_ALLOC_MEMORY(sc, 760 alloc->type, 761 alloc->pg_count << AGP_PAGE_SHIFT); 762 if (mem) { 763 alloc->key = mem->am_id; 764 alloc->physical = mem->am_physical; 765 return 0; 766 } else { 767 return ENOMEM; 768 } 769 } 770 771 static int 772 agp_deallocate_user(struct agp_softc *sc, int id) 773 { 774 struct agp_memory *mem = agp_find_memory(sc, id); 775 776 if (mem) { 777 AGP_FREE_MEMORY(sc, mem); 778 return 0; 779 } else { 780 return ENOENT; 781 } 782 } 783 784 static int 785 agp_bind_user(struct agp_softc *sc, agp_bind *bind) 786 { 787 struct agp_memory *mem = agp_find_memory(sc, bind->key); 788 789 if (!mem) 790 return ENOENT; 791 792 return AGP_BIND_MEMORY(sc, mem, bind->pg_start << AGP_PAGE_SHIFT); 793 } 794 795 static int 796 agp_unbind_user(struct agp_softc *sc, agp_unbind *unbind) 797 { 798 struct agp_memory *mem = agp_find_memory(sc, unbind->key); 799 800 if (!mem) 801 return ENOENT; 802 803 return AGP_UNBIND_MEMORY(sc, mem); 804 } 805 806 static int 807 agpopen(dev_t dev, int oflags, int devtype, 808 struct lwp *l) 809 { 810 struct agp_softc *sc = device_lookup(&agp_cd, AGPUNIT(dev)); 811 812 if (sc == NULL) 813 return ENXIO; 814 815 if (sc->as_chipc == NULL) 816 return ENXIO; 817 818 if (!sc->as_isopen) 819 sc->as_isopen = 1; 820 else 821 return EBUSY; 822 823 return 0; 824 } 825 826 static int 827 agpclose(dev_t dev, int fflag, int devtype, 828 struct lwp *l) 829 { 830 struct agp_softc *sc = device_lookup(&agp_cd, AGPUNIT(dev)); 831 struct agp_memory *mem; 832 833 /* 834 * Clear the GATT and force release on last close 835 */ 836 if (sc->as_state == AGP_ACQUIRE_USER) { 837 while ((mem = TAILQ_FIRST(&sc->as_memory))) { 838 if (mem->am_is_bound) { 839 printf("agpclose: mem %d is bound\n", 840 mem->am_id); 841 AGP_UNBIND_MEMORY(sc, mem); 842 } 843 /* 844 * XXX it is not documented, but if the protocol allows 845 * allocate->acquire->bind, it would be possible that 846 * memory ranges are allocated by the kernel here, 847 * which we shouldn't free. We'd have to keep track of 848 * the memory range's owner. 849 * The kernel API is unsed yet, so we get away with 850 * freeing all. 851 */ 852 AGP_FREE_MEMORY(sc, mem); 853 } 854 agp_release_helper(sc, AGP_ACQUIRE_USER); 855 } 856 sc->as_isopen = 0; 857 858 return 0; 859 } 860 861 static int 862 agpioctl(dev_t dev, u_long cmd, void *data, int fflag, struct lwp *l) 863 { 864 struct agp_softc *sc = device_lookup(&agp_cd, AGPUNIT(dev)); 865 866 if (sc == NULL) 867 return ENODEV; 868 869 if ((fflag & FWRITE) == 0 && cmd != AGPIOC_INFO) 870 return EPERM; 871 872 switch (cmd) { 873 case AGPIOC_INFO: 874 return agp_info_user(sc, (agp_info *) data); 875 876 case AGPIOC_ACQUIRE: 877 return agp_acquire_helper(sc, AGP_ACQUIRE_USER); 878 879 case AGPIOC_RELEASE: 880 return agp_release_helper(sc, AGP_ACQUIRE_USER); 881 882 case AGPIOC_SETUP: 883 return agp_setup_user(sc, (agp_setup *)data); 884 885 case AGPIOC_ALLOCATE: 886 return agp_allocate_user(sc, (agp_allocate *)data); 887 888 case AGPIOC_DEALLOCATE: 889 return agp_deallocate_user(sc, *(int *) data); 890 891 case AGPIOC_BIND: 892 return agp_bind_user(sc, (agp_bind *)data); 893 894 case AGPIOC_UNBIND: 895 return agp_unbind_user(sc, (agp_unbind *)data); 896 897 } 898 899 return EINVAL; 900 } 901 902 static paddr_t 903 agpmmap(dev_t dev, off_t offset, int prot) 904 { 905 struct agp_softc *sc = device_lookup(&agp_cd, AGPUNIT(dev)); 906 907 if (offset > AGP_GET_APERTURE(sc)) 908 return -1; 909 910 return (bus_space_mmap(sc->as_apt, sc->as_apaddr, offset, prot, 911 BUS_SPACE_MAP_LINEAR)); 912 } 913 914 const struct cdevsw agp_cdevsw = { 915 agpopen, agpclose, noread, nowrite, agpioctl, 916 nostop, notty, nopoll, agpmmap, nokqfilter, D_OTHER 917 }; 918 919 /* Implementation of the kernel api */ 920 921 void * 922 agp_find_device(int unit) 923 { 924 return device_lookup(&agp_cd, unit); 925 } 926 927 enum agp_acquire_state 928 agp_state(void *devcookie) 929 { 930 struct agp_softc *sc = devcookie; 931 return sc->as_state; 932 } 933 934 void 935 agp_get_info(void *devcookie, struct agp_info *info) 936 { 937 struct agp_softc *sc = devcookie; 938 939 info->ai_mode = pci_conf_read(sc->as_pc, sc->as_tag, 940 sc->as_capoff + AGP_STATUS); 941 info->ai_aperture_base = sc->as_apaddr; 942 info->ai_aperture_size = sc->as_apsize; /* XXXfvdl inconsistent */ 943 info->ai_memory_allowed = sc->as_maxmem; 944 info->ai_memory_used = sc->as_allocated; 945 } 946 947 int 948 agp_acquire(void *dev) 949 { 950 return agp_acquire_helper(dev, AGP_ACQUIRE_KERNEL); 951 } 952 953 int 954 agp_release(void *dev) 955 { 956 return agp_release_helper(dev, AGP_ACQUIRE_KERNEL); 957 } 958 959 int 960 agp_enable(void *dev, u_int32_t mode) 961 { 962 struct agp_softc *sc = dev; 963 964 return AGP_ENABLE(sc, mode); 965 } 966 967 void *agp_alloc_memory(void *dev, int type, vsize_t bytes) 968 { 969 struct agp_softc *sc = dev; 970 971 return (void *)AGP_ALLOC_MEMORY(sc, type, bytes); 972 } 973 974 void agp_free_memory(void *dev, void *handle) 975 { 976 struct agp_softc *sc = dev; 977 struct agp_memory *mem = (struct agp_memory *) handle; 978 AGP_FREE_MEMORY(sc, mem); 979 } 980 981 int agp_bind_memory(void *dev, void *handle, off_t offset) 982 { 983 struct agp_softc *sc = dev; 984 struct agp_memory *mem = (struct agp_memory *) handle; 985 986 return AGP_BIND_MEMORY(sc, mem, offset); 987 } 988 989 int agp_unbind_memory(void *dev, void *handle) 990 { 991 struct agp_softc *sc = dev; 992 struct agp_memory *mem = (struct agp_memory *) handle; 993 994 return AGP_UNBIND_MEMORY(sc, mem); 995 } 996 997 void agp_memory_info(void *dev, void *handle, 998 struct agp_memory_info *mi) 999 { 1000 struct agp_memory *mem = (struct agp_memory *) handle; 1001 1002 mi->ami_size = mem->am_size; 1003 mi->ami_physical = mem->am_physical; 1004 mi->ami_offset = mem->am_offset; 1005 mi->ami_is_bound = mem->am_is_bound; 1006 } 1007 1008 int 1009 agp_alloc_dmamem(bus_dma_tag_t tag, size_t size, int flags, 1010 bus_dmamap_t *mapp, void **vaddr, bus_addr_t *baddr, 1011 bus_dma_segment_t *seg, int nseg, int *rseg) 1012 1013 { 1014 int error, level = 0; 1015 1016 if ((error = bus_dmamem_alloc(tag, size, PAGE_SIZE, 0, 1017 seg, nseg, rseg, BUS_DMA_NOWAIT)) != 0) 1018 goto out; 1019 level++; 1020 1021 if ((error = bus_dmamem_map(tag, seg, *rseg, size, vaddr, 1022 BUS_DMA_NOWAIT | flags)) != 0) 1023 goto out; 1024 level++; 1025 1026 if ((error = bus_dmamap_create(tag, size, *rseg, size, 0, 1027 BUS_DMA_NOWAIT, mapp)) != 0) 1028 goto out; 1029 level++; 1030 1031 if ((error = bus_dmamap_load(tag, *mapp, *vaddr, size, NULL, 1032 BUS_DMA_NOWAIT)) != 0) 1033 goto out; 1034 1035 *baddr = (*mapp)->dm_segs[0].ds_addr; 1036 1037 return 0; 1038 out: 1039 switch (level) { 1040 case 3: 1041 bus_dmamap_destroy(tag, *mapp); 1042 /* FALLTHROUGH */ 1043 case 2: 1044 bus_dmamem_unmap(tag, *vaddr, size); 1045 /* FALLTHROUGH */ 1046 case 1: 1047 bus_dmamem_free(tag, seg, *rseg); 1048 break; 1049 default: 1050 break; 1051 } 1052 1053 return error; 1054 } 1055 1056 void 1057 agp_free_dmamem(bus_dma_tag_t tag, size_t size, bus_dmamap_t map, 1058 void *vaddr, bus_dma_segment_t *seg, int nseg) 1059 { 1060 1061 bus_dmamap_unload(tag, map); 1062 bus_dmamap_destroy(tag, map); 1063 bus_dmamem_unmap(tag, vaddr, size); 1064 bus_dmamem_free(tag, seg, nseg); 1065 } 1066
Indexes created Mon Sep 22 13:09:51 GMT 2025