agp.c revision 1.38
1 /* $NetBSD: agp.c,v 1.38 2006/06/27 10:34:25 tron 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 1.38 2006/06/27 10:34:25 tron 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 81 #include <uvm/uvm_extern.h> 82 83 #include <dev/pci/pcireg.h> 84 #include <dev/pci/pcivar.h> 85 #include <dev/pci/agpvar.h> 86 #include <dev/pci/agpreg.h> 87 #include <dev/pci/pcidevs.h> 88 89 #include <machine/bus.h> 90 91 MALLOC_DEFINE(M_AGP, "AGP", "AGP memory"); 92 93 /* Helper functions for implementing chipset mini drivers. */ 94 /* XXXfvdl get rid of this one. */ 95 96 extern struct cfdriver agp_cd; 97 98 static int agp_info_user(struct agp_softc *, agp_info *); 99 static int agp_setup_user(struct agp_softc *, agp_setup *); 100 static int agp_allocate_user(struct agp_softc *, agp_allocate *); 101 static int agp_deallocate_user(struct agp_softc *, int); 102 static int agp_bind_user(struct agp_softc *, agp_bind *); 103 static int agp_unbind_user(struct agp_softc *, agp_unbind *); 104 static int agpdev_match(struct pci_attach_args *); 105 106 #include "agp_ali.h" 107 #include "agp_amd.h" 108 #include "agp_i810.h" 109 #include "agp_intel.h" 110 #include "agp_sis.h" 111 #include "agp_via.h" 112 113 const struct agp_product { 114 uint32_t ap_vendor; 115 uint32_t ap_product; 116 int (*ap_match)(const struct pci_attach_args *); 117 int (*ap_attach)(struct device *, struct device *, void *); 118 } agp_products[] = { 119 #if NAGP_ALI > 0 120 { PCI_VENDOR_ALI, -1, 121 NULL, agp_ali_attach }, 122 #endif 123 124 #if NAGP_AMD > 0 125 { PCI_VENDOR_AMD, -1, 126 agp_amd_match, agp_amd_attach }, 127 #endif 128 129 #if NAGP_I810 > 0 130 { PCI_VENDOR_INTEL, PCI_PRODUCT_INTEL_82810_MCH, 131 NULL, agp_i810_attach }, 132 { PCI_VENDOR_INTEL, PCI_PRODUCT_INTEL_82810_DC100_MCH, 133 NULL, agp_i810_attach }, 134 { PCI_VENDOR_INTEL, PCI_PRODUCT_INTEL_82810E_MCH, 135 NULL, agp_i810_attach }, 136 { PCI_VENDOR_INTEL, PCI_PRODUCT_INTEL_82815_FULL_HUB, 137 NULL, agp_i810_attach }, 138 { PCI_VENDOR_INTEL, PCI_PRODUCT_INTEL_82840_HB, 139 NULL, agp_i810_attach }, 140 { PCI_VENDOR_INTEL, PCI_PRODUCT_INTEL_82830MP_IO_1, 141 NULL, agp_i810_attach }, 142 { PCI_VENDOR_INTEL, PCI_PRODUCT_INTEL_82845G_DRAM, 143 NULL, agp_i810_attach }, 144 { PCI_VENDOR_INTEL, PCI_PRODUCT_INTEL_82855GM_MCH, 145 NULL, agp_i810_attach }, 146 { PCI_VENDOR_INTEL, PCI_PRODUCT_INTEL_82865_HB, 147 NULL, agp_i810_attach }, 148 { PCI_VENDOR_INTEL, PCI_PRODUCT_INTEL_82915G_HB, 149 NULL, agp_i810_attach }, 150 { PCI_VENDOR_INTEL, PCI_PRODUCT_INTEL_82915GM_HB, 151 NULL, agp_i810_attach }, 152 #endif 153 154 #if NAGP_INTEL > 0 155 { PCI_VENDOR_INTEL, -1, 156 NULL, agp_intel_attach }, 157 #endif 158 159 #if NAGP_SIS > 0 160 { PCI_VENDOR_SIS, -1, 161 NULL, agp_sis_attach }, 162 #endif 163 164 #if NAGP_VIA > 0 165 { PCI_VENDOR_VIATECH, -1, 166 NULL, agp_via_attach }, 167 #endif 168 169 { 0, 0, 170 NULL, NULL }, 171 }; 172 173 static const struct agp_product * 174 agp_lookup(const struct pci_attach_args *pa) 175 { 176 const struct agp_product *ap; 177 178 /* First find the vendor. */ 179 for (ap = agp_products; ap->ap_attach != NULL; ap++) { 180 if (PCI_VENDOR(pa->pa_id) == ap->ap_vendor) 181 break; 182 } 183 184 if (ap->ap_attach == NULL) 185 return (NULL); 186 187 /* Now find the product within the vendor's domain. */ 188 for (; ap->ap_attach != NULL; ap++) { 189 if (PCI_VENDOR(pa->pa_id) != ap->ap_vendor) { 190 /* Ran out of this vendor's section of the table. */ 191 return (NULL); 192 } 193 if (ap->ap_product == PCI_PRODUCT(pa->pa_id)) { 194 /* Exact match. */ 195 break; 196 } 197 if (ap->ap_product == (uint32_t) -1) { 198 /* Wildcard match. */ 199 break; 200 } 201 } 202 203 if (ap->ap_attach == NULL) 204 return (NULL); 205 206 /* Now let the product-specific driver filter the match. */ 207 if (ap->ap_match != NULL && (*ap->ap_match)(pa) == 0) 208 return (NULL); 209 210 return (ap); 211 } 212 213 static int 214 agpmatch(struct device *parent, struct cfdata *match, void *aux) 215 { 216 struct agpbus_attach_args *apa = aux; 217 struct pci_attach_args *pa = &apa->apa_pci_args; 218 219 if (agp_lookup(pa) == NULL) 220 return (0); 221 222 return (1); 223 } 224 225 static const int agp_max[][2] = { 226 {0, 0}, 227 {32, 4}, 228 {64, 28}, 229 {128, 96}, 230 {256, 204}, 231 {512, 440}, 232 {1024, 942}, 233 {2048, 1920}, 234 {4096, 3932} 235 }; 236 #define agp_max_size (sizeof(agp_max) / sizeof(agp_max[0])) 237 238 static void 239 agpattach(struct device *parent, struct device *self, void *aux) 240 { 241 struct agpbus_attach_args *apa = aux; 242 struct pci_attach_args *pa = &apa->apa_pci_args; 243 struct agp_softc *sc = (void *)self; 244 const struct agp_product *ap; 245 int memsize, i, ret; 246 247 ap = agp_lookup(pa); 248 if (ap == NULL) { 249 printf("\n"); 250 panic("agpattach: impossible"); 251 } 252 253 aprint_naive(": AGP controller\n"); 254 255 sc->as_dmat = pa->pa_dmat; 256 sc->as_pc = pa->pa_pc; 257 sc->as_tag = pa->pa_tag; 258 sc->as_id = pa->pa_id; 259 260 /* 261 * Work out an upper bound for agp memory allocation. This 262 * uses a heurisitc table from the Linux driver. 263 */ 264 memsize = ptoa(physmem) >> 20; 265 for (i = 0; i < agp_max_size; i++) { 266 if (memsize <= agp_max[i][0]) 267 break; 268 } 269 if (i == agp_max_size) 270 i = agp_max_size - 1; 271 sc->as_maxmem = agp_max[i][1] << 20U; 272 273 /* 274 * The lock is used to prevent re-entry to 275 * agp_generic_bind_memory() since that function can sleep. 276 */ 277 lockinit(&sc->as_lock, PZERO|PCATCH, "agplk", 0, 0); 278 279 TAILQ_INIT(&sc->as_memory); 280 281 ret = (*ap->ap_attach)(parent, self, pa); 282 if (ret == 0) 283 aprint_normal(": aperture at 0x%lx, size 0x%lx\n", 284 (unsigned long)sc->as_apaddr, 285 (unsigned long)AGP_GET_APERTURE(sc)); 286 else 287 sc->as_chipc = NULL; 288 } 289 290 CFATTACH_DECL(agp, sizeof(struct agp_softc), 291 agpmatch, agpattach, NULL, NULL); 292 293 int 294 agp_map_aperture(struct pci_attach_args *pa, struct agp_softc *sc, int reg) 295 { 296 /* 297 * Find the aperture. Don't map it (yet), this would 298 * eat KVA. 299 */ 300 if (pci_mapreg_info(pa->pa_pc, pa->pa_tag, reg, 301 PCI_MAPREG_TYPE_MEM, &sc->as_apaddr, &sc->as_apsize, 302 &sc->as_apflags) != 0) 303 return ENXIO; 304 305 sc->as_apt = pa->pa_memt; 306 307 return 0; 308 } 309 310 struct agp_gatt * 311 agp_alloc_gatt(struct agp_softc *sc) 312 { 313 u_int32_t apsize = AGP_GET_APERTURE(sc); 314 u_int32_t entries = apsize >> AGP_PAGE_SHIFT; 315 struct agp_gatt *gatt; 316 caddr_t virtual; 317 int dummyseg; 318 319 gatt = malloc(sizeof(struct agp_gatt), M_AGP, M_NOWAIT); 320 if (!gatt) 321 return NULL; 322 gatt->ag_entries = entries; 323 324 if (agp_alloc_dmamem(sc->as_dmat, entries * sizeof(u_int32_t), 325 0, &gatt->ag_dmamap, &virtual, &gatt->ag_physical, 326 &gatt->ag_dmaseg, 1, &dummyseg) != 0) 327 return NULL; 328 gatt->ag_virtual = (uint32_t *)virtual; 329 330 gatt->ag_size = entries * sizeof(u_int32_t); 331 memset(gatt->ag_virtual, 0, gatt->ag_size); 332 agp_flush_cache(); 333 334 return gatt; 335 } 336 337 void 338 agp_free_gatt(struct agp_softc *sc, struct agp_gatt *gatt) 339 { 340 agp_free_dmamem(sc->as_dmat, gatt->ag_size, gatt->ag_dmamap, 341 (caddr_t)gatt->ag_virtual, &gatt->ag_dmaseg, 1); 342 free(gatt, M_AGP); 343 } 344 345 346 int 347 agp_generic_detach(struct agp_softc *sc) 348 { 349 lockmgr(&sc->as_lock, LK_DRAIN, 0); 350 agp_flush_cache(); 351 return 0; 352 } 353 354 static int 355 agpdev_match(struct pci_attach_args *pa) 356 { 357 if (PCI_CLASS(pa->pa_class) == PCI_CLASS_DISPLAY && 358 PCI_SUBCLASS(pa->pa_class) == PCI_SUBCLASS_DISPLAY_VGA) 359 if (pci_get_capability(pa->pa_pc, pa->pa_tag, PCI_CAP_AGP, 360 NULL, NULL)) 361 return 1; 362 363 return 0; 364 } 365 366 int 367 agp_generic_enable(struct agp_softc *sc, u_int32_t mode) 368 { 369 struct pci_attach_args pa; 370 pcireg_t tstatus, mstatus; 371 pcireg_t command; 372 int rq, sba, fw, rate, capoff; 373 374 if (pci_find_device(&pa, agpdev_match) == 0 || 375 pci_get_capability(pa.pa_pc, pa.pa_tag, PCI_CAP_AGP, 376 &capoff, NULL) == 0) { 377 printf("%s: can't find display\n", sc->as_dev.dv_xname); 378 return ENXIO; 379 } 380 381 tstatus = pci_conf_read(sc->as_pc, sc->as_tag, 382 sc->as_capoff + AGP_STATUS); 383 mstatus = pci_conf_read(pa.pa_pc, pa.pa_tag, 384 capoff + AGP_STATUS); 385 386 /* Set RQ to the min of mode, tstatus and mstatus */ 387 rq = AGP_MODE_GET_RQ(mode); 388 if (AGP_MODE_GET_RQ(tstatus) < rq) 389 rq = AGP_MODE_GET_RQ(tstatus); 390 if (AGP_MODE_GET_RQ(mstatus) < rq) 391 rq = AGP_MODE_GET_RQ(mstatus); 392 393 /* Set SBA if all three can deal with SBA */ 394 sba = (AGP_MODE_GET_SBA(tstatus) 395 & AGP_MODE_GET_SBA(mstatus) 396 & AGP_MODE_GET_SBA(mode)); 397 398 /* Similar for FW */ 399 fw = (AGP_MODE_GET_FW(tstatus) 400 & AGP_MODE_GET_FW(mstatus) 401 & AGP_MODE_GET_FW(mode)); 402 403 /* Figure out the max rate */ 404 rate = (AGP_MODE_GET_RATE(tstatus) 405 & AGP_MODE_GET_RATE(mstatus) 406 & AGP_MODE_GET_RATE(mode)); 407 if (rate & AGP_MODE_RATE_4x) 408 rate = AGP_MODE_RATE_4x; 409 else if (rate & AGP_MODE_RATE_2x) 410 rate = AGP_MODE_RATE_2x; 411 else 412 rate = AGP_MODE_RATE_1x; 413 414 /* Construct the new mode word and tell the hardware */ 415 command = AGP_MODE_SET_RQ(0, rq); 416 command = AGP_MODE_SET_SBA(command, sba); 417 command = AGP_MODE_SET_FW(command, fw); 418 command = AGP_MODE_SET_RATE(command, rate); 419 command = AGP_MODE_SET_AGP(command, 1); 420 pci_conf_write(sc->as_pc, sc->as_tag, 421 sc->as_capoff + AGP_COMMAND, command); 422 pci_conf_write(pa.pa_pc, pa.pa_tag, capoff + AGP_COMMAND, command); 423 424 return 0; 425 } 426 427 struct agp_memory * 428 agp_generic_alloc_memory(struct agp_softc *sc, int type, vsize_t size) 429 { 430 struct agp_memory *mem; 431 432 if ((size & (AGP_PAGE_SIZE - 1)) != 0) 433 return 0; 434 435 if (sc->as_allocated + size > sc->as_maxmem) 436 return 0; 437 438 if (type != 0) { 439 printf("agp_generic_alloc_memory: unsupported type %d\n", 440 type); 441 return 0; 442 } 443 444 mem = malloc(sizeof *mem, M_AGP, M_WAITOK); 445 if (mem == NULL) 446 return NULL; 447 448 if (bus_dmamap_create(sc->as_dmat, size, size / PAGE_SIZE + 1, 449 size, 0, BUS_DMA_NOWAIT, &mem->am_dmamap) != 0) { 450 free(mem, M_AGP); 451 return NULL; 452 } 453 454 mem->am_id = sc->as_nextid++; 455 mem->am_size = size; 456 mem->am_type = 0; 457 mem->am_physical = 0; 458 mem->am_offset = 0; 459 mem->am_is_bound = 0; 460 TAILQ_INSERT_TAIL(&sc->as_memory, mem, am_link); 461 sc->as_allocated += size; 462 463 return mem; 464 } 465 466 int 467 agp_generic_free_memory(struct agp_softc *sc, struct agp_memory *mem) 468 { 469 if (mem->am_is_bound) 470 return EBUSY; 471 472 sc->as_allocated -= mem->am_size; 473 TAILQ_REMOVE(&sc->as_memory, mem, am_link); 474 bus_dmamap_destroy(sc->as_dmat, mem->am_dmamap); 475 free(mem, M_AGP); 476 return 0; 477 } 478 479 int 480 agp_generic_bind_memory(struct agp_softc *sc, struct agp_memory *mem, 481 off_t offset) 482 { 483 off_t i, k; 484 bus_size_t done, j; 485 int error; 486 bus_dma_segment_t *segs, *seg; 487 bus_addr_t pa; 488 int contigpages, nseg; 489 490 lockmgr(&sc->as_lock, LK_EXCLUSIVE, 0); 491 492 if (mem->am_is_bound) { 493 printf("%s: memory already bound\n", sc->as_dev.dv_xname); 494 lockmgr(&sc->as_lock, LK_RELEASE, 0); 495 return EINVAL; 496 } 497 498 if (offset < 0 499 || (offset & (AGP_PAGE_SIZE - 1)) != 0 500 || offset + mem->am_size > AGP_GET_APERTURE(sc)) { 501 printf("%s: binding memory at bad offset %#lx\n", 502 sc->as_dev.dv_xname, (unsigned long) offset); 503 lockmgr(&sc->as_lock, LK_RELEASE, 0); 504 return EINVAL; 505 } 506 507 /* 508 * XXXfvdl 509 * The memory here needs to be directly accessable from the 510 * AGP video card, so it should be allocated using bus_dma. 511 * However, it need not be contiguous, since individual pages 512 * are translated using the GATT. 513 * 514 * Using a large chunk of contiguous memory may get in the way 515 * of other subsystems that may need one, so we try to be friendly 516 * and ask for allocation in chunks of a minimum of 8 pages 517 * of contiguous memory on average, falling back to 4, 2 and 1 518 * if really needed. Larger chunks are preferred, since allocating 519 * a bus_dma_segment per page would be overkill. 520 */ 521 522 for (contigpages = 8; contigpages > 0; contigpages >>= 1) { 523 nseg = (mem->am_size / (contigpages * PAGE_SIZE)) + 1; 524 segs = malloc(nseg * sizeof *segs, M_AGP, M_WAITOK); 525 if (segs == NULL) { 526 lockmgr(&sc->as_lock, LK_RELEASE, 0); 527 return ENOMEM; 528 } 529 if (bus_dmamem_alloc(sc->as_dmat, mem->am_size, PAGE_SIZE, 0, 530 segs, nseg, &mem->am_nseg, 531 contigpages > 1 ? 532 BUS_DMA_NOWAIT : BUS_DMA_WAITOK) != 0) { 533 free(segs, M_AGP); 534 continue; 535 } 536 if (bus_dmamem_map(sc->as_dmat, segs, mem->am_nseg, 537 mem->am_size, &mem->am_virtual, BUS_DMA_WAITOK) != 0) { 538 bus_dmamem_free(sc->as_dmat, segs, mem->am_nseg); 539 free(segs, M_AGP); 540 continue; 541 } 542 if (bus_dmamap_load(sc->as_dmat, mem->am_dmamap, 543 mem->am_virtual, mem->am_size, NULL, BUS_DMA_WAITOK) != 0) { 544 bus_dmamem_unmap(sc->as_dmat, mem->am_virtual, 545 mem->am_size); 546 bus_dmamem_free(sc->as_dmat, segs, mem->am_nseg); 547 free(segs, M_AGP); 548 continue; 549 } 550 mem->am_dmaseg = segs; 551 break; 552 } 553 554 if (contigpages == 0) { 555 lockmgr(&sc->as_lock, LK_RELEASE, 0); 556 return ENOMEM; 557 } 558 559 560 /* 561 * Bind the individual pages and flush the chipset's 562 * TLB. 563 */ 564 done = 0; 565 for (i = 0; i < mem->am_dmamap->dm_nsegs; i++) { 566 seg = &mem->am_dmamap->dm_segs[i]; 567 /* 568 * Install entries in the GATT, making sure that if 569 * AGP_PAGE_SIZE < PAGE_SIZE and mem->am_size is not 570 * aligned to PAGE_SIZE, we don't modify too many GATT 571 * entries. 572 */ 573 for (j = 0; j < seg->ds_len && (done + j) < mem->am_size; 574 j += AGP_PAGE_SIZE) { 575 pa = seg->ds_addr + j; 576 AGP_DPF("binding offset %#lx to pa %#lx\n", 577 (unsigned long)(offset + done + j), 578 (unsigned long)pa); 579 error = AGP_BIND_PAGE(sc, offset + done + j, pa); 580 if (error) { 581 /* 582 * Bail out. Reverse all the mappings 583 * and unwire the pages. 584 */ 585 for (k = 0; k < done + j; k += AGP_PAGE_SIZE) 586 AGP_UNBIND_PAGE(sc, offset + k); 587 588 bus_dmamap_unload(sc->as_dmat, mem->am_dmamap); 589 bus_dmamem_unmap(sc->as_dmat, mem->am_virtual, 590 mem->am_size); 591 bus_dmamem_free(sc->as_dmat, mem->am_dmaseg, 592 mem->am_nseg); 593 free(mem->am_dmaseg, M_AGP); 594 lockmgr(&sc->as_lock, LK_RELEASE, 0); 595 return error; 596 } 597 } 598 done += seg->ds_len; 599 } 600 601 /* 602 * Flush the CPU cache since we are providing a new mapping 603 * for these pages. 604 */ 605 agp_flush_cache(); 606 607 /* 608 * Make sure the chipset gets the new mappings. 609 */ 610 AGP_FLUSH_TLB(sc); 611 612 mem->am_offset = offset; 613 mem->am_is_bound = 1; 614 615 lockmgr(&sc->as_lock, LK_RELEASE, 0); 616 617 return 0; 618 } 619 620 int 621 agp_generic_unbind_memory(struct agp_softc *sc, struct agp_memory *mem) 622 { 623 int i; 624 625 lockmgr(&sc->as_lock, LK_EXCLUSIVE, 0); 626 627 if (!mem->am_is_bound) { 628 printf("%s: memory is not bound\n", sc->as_dev.dv_xname); 629 lockmgr(&sc->as_lock, LK_RELEASE, 0); 630 return EINVAL; 631 } 632 633 634 /* 635 * Unbind the individual pages and flush the chipset's 636 * TLB. Unwire the pages so they can be swapped. 637 */ 638 for (i = 0; i < mem->am_size; i += AGP_PAGE_SIZE) 639 AGP_UNBIND_PAGE(sc, mem->am_offset + i); 640 641 agp_flush_cache(); 642 AGP_FLUSH_TLB(sc); 643 644 bus_dmamap_unload(sc->as_dmat, mem->am_dmamap); 645 bus_dmamem_unmap(sc->as_dmat, mem->am_virtual, mem->am_size); 646 bus_dmamem_free(sc->as_dmat, mem->am_dmaseg, mem->am_nseg); 647 648 free(mem->am_dmaseg, M_AGP); 649 650 mem->am_offset = 0; 651 mem->am_is_bound = 0; 652 653 lockmgr(&sc->as_lock, LK_RELEASE, 0); 654 655 return 0; 656 } 657 658 /* Helper functions for implementing user/kernel api */ 659 660 static int 661 agp_acquire_helper(struct agp_softc *sc, enum agp_acquire_state state) 662 { 663 if (sc->as_state != AGP_ACQUIRE_FREE) 664 return EBUSY; 665 sc->as_state = state; 666 667 return 0; 668 } 669 670 static int 671 agp_release_helper(struct agp_softc *sc, enum agp_acquire_state state) 672 { 673 struct agp_memory *mem; 674 675 if (sc->as_state == AGP_ACQUIRE_FREE) 676 return 0; 677 678 if (sc->as_state != state) 679 return EBUSY; 680 681 /* 682 * Clear out outstanding aperture mappings. 683 * (should not be necessary, done by caller) 684 */ 685 TAILQ_FOREACH(mem, &sc->as_memory, am_link) { 686 if (mem->am_is_bound) { 687 printf("agp_release_helper: mem %d is bound\n", 688 mem->am_id); 689 AGP_UNBIND_MEMORY(sc, mem); 690 } 691 } 692 693 sc->as_state = AGP_ACQUIRE_FREE; 694 return 0; 695 } 696 697 static struct agp_memory * 698 agp_find_memory(struct agp_softc *sc, int id) 699 { 700 struct agp_memory *mem; 701 702 AGP_DPF("searching for memory block %d\n", id); 703 TAILQ_FOREACH(mem, &sc->as_memory, am_link) { 704 AGP_DPF("considering memory block %d\n", mem->am_id); 705 if (mem->am_id == id) 706 return mem; 707 } 708 return 0; 709 } 710 711 /* Implementation of the userland ioctl api */ 712 713 static int 714 agp_info_user(struct agp_softc *sc, agp_info *info) 715 { 716 memset(info, 0, sizeof *info); 717 info->bridge_id = sc->as_id; 718 if (sc->as_capoff != 0) 719 info->agp_mode = pci_conf_read(sc->as_pc, sc->as_tag, 720 sc->as_capoff + AGP_STATUS); 721 else 722 info->agp_mode = 0; /* i810 doesn't have real AGP */ 723 info->aper_base = sc->as_apaddr; 724 info->aper_size = AGP_GET_APERTURE(sc) >> 20; 725 info->pg_total = info->pg_system = sc->as_maxmem >> AGP_PAGE_SHIFT; 726 info->pg_used = sc->as_allocated >> AGP_PAGE_SHIFT; 727 728 return 0; 729 } 730 731 static int 732 agp_setup_user(struct agp_softc *sc, agp_setup *setup) 733 { 734 return AGP_ENABLE(sc, setup->agp_mode); 735 } 736 737 static int 738 agp_allocate_user(struct agp_softc *sc, agp_allocate *alloc) 739 { 740 struct agp_memory *mem; 741 742 mem = AGP_ALLOC_MEMORY(sc, 743 alloc->type, 744 alloc->pg_count << AGP_PAGE_SHIFT); 745 if (mem) { 746 alloc->key = mem->am_id; 747 alloc->physical = mem->am_physical; 748 return 0; 749 } else { 750 return ENOMEM; 751 } 752 } 753 754 static int 755 agp_deallocate_user(struct agp_softc *sc, int id) 756 { 757 struct agp_memory *mem = agp_find_memory(sc, id); 758 759 if (mem) { 760 AGP_FREE_MEMORY(sc, mem); 761 return 0; 762 } else { 763 return ENOENT; 764 } 765 } 766 767 static int 768 agp_bind_user(struct agp_softc *sc, agp_bind *bind) 769 { 770 struct agp_memory *mem = agp_find_memory(sc, bind->key); 771 772 if (!mem) 773 return ENOENT; 774 775 return AGP_BIND_MEMORY(sc, mem, bind->pg_start << AGP_PAGE_SHIFT); 776 } 777 778 static int 779 agp_unbind_user(struct agp_softc *sc, agp_unbind *unbind) 780 { 781 struct agp_memory *mem = agp_find_memory(sc, unbind->key); 782 783 if (!mem) 784 return ENOENT; 785 786 return AGP_UNBIND_MEMORY(sc, mem); 787 } 788 789 static int 790 agpopen(dev_t dev, int oflags, int devtype, struct lwp *l) 791 { 792 struct agp_softc *sc = device_lookup(&agp_cd, AGPUNIT(dev)); 793 794 if (sc == NULL) 795 return ENXIO; 796 797 if (sc->as_chipc == NULL) 798 return ENXIO; 799 800 if (!sc->as_isopen) 801 sc->as_isopen = 1; 802 else 803 return EBUSY; 804 805 return 0; 806 } 807 808 static int 809 agpclose(dev_t dev, int fflag, int devtype, struct lwp *l) 810 { 811 struct agp_softc *sc = device_lookup(&agp_cd, AGPUNIT(dev)); 812 struct agp_memory *mem; 813 814 /* 815 * Clear the GATT and force release on last close 816 */ 817 if (sc->as_state == AGP_ACQUIRE_USER) { 818 while ((mem = TAILQ_FIRST(&sc->as_memory))) { 819 if (mem->am_is_bound) { 820 printf("agpclose: mem %d is bound\n", 821 mem->am_id); 822 AGP_UNBIND_MEMORY(sc, mem); 823 } 824 /* 825 * XXX it is not documented, but if the protocol allows 826 * allocate->acquire->bind, it would be possible that 827 * memory ranges are allocated by the kernel here, 828 * which we shouldn't free. We'd have to keep track of 829 * the memory range's owner. 830 * The kernel API is unsed yet, so we get away with 831 * freeing all. 832 */ 833 AGP_FREE_MEMORY(sc, mem); 834 } 835 agp_release_helper(sc, AGP_ACQUIRE_USER); 836 } 837 sc->as_isopen = 0; 838 839 return 0; 840 } 841 842 static int 843 agpioctl(dev_t dev, u_long cmd, caddr_t data, int fflag, struct lwp *l) 844 { 845 struct agp_softc *sc = device_lookup(&agp_cd, AGPUNIT(dev)); 846 847 if (sc == NULL) 848 return ENODEV; 849 850 if ((fflag & FWRITE) == 0 && cmd != AGPIOC_INFO) 851 return EPERM; 852 853 switch (cmd) { 854 case AGPIOC_INFO: 855 return agp_info_user(sc, (agp_info *) data); 856 857 case AGPIOC_ACQUIRE: 858 return agp_acquire_helper(sc, AGP_ACQUIRE_USER); 859 860 case AGPIOC_RELEASE: 861 return agp_release_helper(sc, AGP_ACQUIRE_USER); 862 863 case AGPIOC_SETUP: 864 return agp_setup_user(sc, (agp_setup *)data); 865 866 case AGPIOC_ALLOCATE: 867 return agp_allocate_user(sc, (agp_allocate *)data); 868 869 case AGPIOC_DEALLOCATE: 870 return agp_deallocate_user(sc, *(int *) data); 871 872 case AGPIOC_BIND: 873 return agp_bind_user(sc, (agp_bind *)data); 874 875 case AGPIOC_UNBIND: 876 return agp_unbind_user(sc, (agp_unbind *)data); 877 878 } 879 880 return EINVAL; 881 } 882 883 static paddr_t 884 agpmmap(dev_t dev, off_t offset, int prot) 885 { 886 struct agp_softc *sc = device_lookup(&agp_cd, AGPUNIT(dev)); 887 888 if (offset > AGP_GET_APERTURE(sc)) 889 return -1; 890 891 return (bus_space_mmap(sc->as_apt, sc->as_apaddr, offset, prot, 892 BUS_SPACE_MAP_LINEAR)); 893 } 894 895 const struct cdevsw agp_cdevsw = { 896 agpopen, agpclose, noread, nowrite, agpioctl, 897 nostop, notty, nopoll, agpmmap, nokqfilter, 898 }; 899 900 /* Implementation of the kernel api */ 901 902 void * 903 agp_find_device(int unit) 904 { 905 return device_lookup(&agp_cd, unit); 906 } 907 908 enum agp_acquire_state 909 agp_state(void *devcookie) 910 { 911 struct agp_softc *sc = devcookie; 912 return sc->as_state; 913 } 914 915 void 916 agp_get_info(void *devcookie, struct agp_info *info) 917 { 918 struct agp_softc *sc = devcookie; 919 920 info->ai_mode = pci_conf_read(sc->as_pc, sc->as_tag, 921 sc->as_capoff + AGP_STATUS); 922 info->ai_aperture_base = sc->as_apaddr; 923 info->ai_aperture_size = sc->as_apsize; /* XXXfvdl inconsistent */ 924 info->ai_memory_allowed = sc->as_maxmem; 925 info->ai_memory_used = sc->as_allocated; 926 } 927 928 int 929 agp_acquire(void *dev) 930 { 931 return agp_acquire_helper(dev, AGP_ACQUIRE_KERNEL); 932 } 933 934 int 935 agp_release(void *dev) 936 { 937 return agp_release_helper(dev, AGP_ACQUIRE_KERNEL); 938 } 939 940 int 941 agp_enable(void *dev, u_int32_t mode) 942 { 943 struct agp_softc *sc = dev; 944 945 return AGP_ENABLE(sc, mode); 946 } 947 948 void *agp_alloc_memory(void *dev, int type, vsize_t bytes) 949 { 950 struct agp_softc *sc = dev; 951 952 return (void *)AGP_ALLOC_MEMORY(sc, type, bytes); 953 } 954 955 void agp_free_memory(void *dev, void *handle) 956 { 957 struct agp_softc *sc = dev; 958 struct agp_memory *mem = (struct agp_memory *) handle; 959 AGP_FREE_MEMORY(sc, mem); 960 } 961 962 int agp_bind_memory(void *dev, void *handle, off_t offset) 963 { 964 struct agp_softc *sc = dev; 965 struct agp_memory *mem = (struct agp_memory *) handle; 966 967 return AGP_BIND_MEMORY(sc, mem, offset); 968 } 969 970 int agp_unbind_memory(void *dev, void *handle) 971 { 972 struct agp_softc *sc = dev; 973 struct agp_memory *mem = (struct agp_memory *) handle; 974 975 return AGP_UNBIND_MEMORY(sc, mem); 976 } 977 978 void agp_memory_info(void *dev, void *handle, struct agp_memory_info *mi) 979 { 980 struct agp_memory *mem = (struct agp_memory *) handle; 981 982 mi->ami_size = mem->am_size; 983 mi->ami_physical = mem->am_physical; 984 mi->ami_offset = mem->am_offset; 985 mi->ami_is_bound = mem->am_is_bound; 986 } 987 988 int 989 agp_alloc_dmamem(bus_dma_tag_t tag, size_t size, int flags, 990 bus_dmamap_t *mapp, caddr_t *vaddr, bus_addr_t *baddr, 991 bus_dma_segment_t *seg, int nseg, int *rseg) 992 993 { 994 int error, level = 0; 995 996 if ((error = bus_dmamem_alloc(tag, size, PAGE_SIZE, 0, 997 seg, nseg, rseg, BUS_DMA_NOWAIT)) != 0) 998 goto out; 999 level++; 1000 1001 if ((error = bus_dmamem_map(tag, seg, *rseg, size, vaddr, 1002 BUS_DMA_NOWAIT | flags)) != 0) 1003 goto out; 1004 level++; 1005 1006 if ((error = bus_dmamap_create(tag, size, *rseg, size, 0, 1007 BUS_DMA_NOWAIT, mapp)) != 0) 1008 goto out; 1009 level++; 1010 1011 if ((error = bus_dmamap_load(tag, *mapp, *vaddr, size, NULL, 1012 BUS_DMA_NOWAIT)) != 0) 1013 goto out; 1014 1015 *baddr = (*mapp)->dm_segs[0].ds_addr; 1016 1017 return 0; 1018 out: 1019 switch (level) { 1020 case 3: 1021 bus_dmamap_destroy(tag, *mapp); 1022 /* FALLTHROUGH */ 1023 case 2: 1024 bus_dmamem_unmap(tag, *vaddr, size); 1025 /* FALLTHROUGH */ 1026 case 1: 1027 bus_dmamem_free(tag, seg, *rseg); 1028 break; 1029 default: 1030 break; 1031 } 1032 1033 return error; 1034 } 1035 1036 void 1037 agp_free_dmamem(bus_dma_tag_t tag, size_t size, bus_dmamap_t map, 1038 caddr_t vaddr, bus_dma_segment_t *seg, int nseg) 1039 { 1040 1041 bus_dmamap_unload(tag, map); 1042 bus_dmamap_destroy(tag, map); 1043 bus_dmamem_unmap(tag, vaddr, size); 1044 bus_dmamem_free(tag, seg, nseg); 1045 } 1046
Indexes created Wed Sep 24 05:09:52 GMT 2025