agp_i810.c revision 1.41.6.2
1 /* $NetBSD: agp_i810.c,v 1.41.6.2 2007/08/06 19:49:35 jmcneill Exp $ */ 2 3 /*- 4 * Copyright (c) 2000 Doug Rabson 5 * Copyright (c) 2000 Ruslan Ermilov 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * $FreeBSD: src/sys/pci/agp_i810.c,v 1.4 2001/07/05 21:28:47 jhb Exp $ 30 */ 31 32 #include <sys/cdefs.h> 33 __KERNEL_RCSID(0, "$NetBSD: agp_i810.c,v 1.41.6.2 2007/08/06 19:49:35 jmcneill Exp $"); 34 35 #include <sys/param.h> 36 #include <sys/systm.h> 37 #include <sys/malloc.h> 38 #include <sys/kernel.h> 39 #include <sys/lock.h> 40 #include <sys/proc.h> 41 #include <sys/device.h> 42 #include <sys/conf.h> 43 44 #include <uvm/uvm_extern.h> 45 46 #include <dev/pci/pcivar.h> 47 #include <dev/pci/pcireg.h> 48 #include <dev/pci/pcidevs.h> 49 #include <dev/pci/agpvar.h> 50 #include <dev/pci/agpreg.h> 51 52 #include <sys/agpio.h> 53 54 #include <machine/bus.h> 55 56 #include "agp_intel.h" 57 58 #define READ1(off) bus_space_read_1(isc->bst, isc->bsh, off) 59 #define READ4(off) bus_space_read_4(isc->bst, isc->bsh, off) 60 #define WRITE4(off,v) bus_space_write_4(isc->bst, isc->bsh, off, v) 61 #define WRITEGTT(off, v) \ 62 do { \ 63 if (isc->chiptype == CHIP_I915) { \ 64 bus_space_write_4(isc->gtt_bst, isc->gtt_bsh, \ 65 (u_int32_t)((off) >> AGP_PAGE_SHIFT) * 4, \ 66 (v)); \ 67 } else { \ 68 WRITE4(AGP_I810_GTT + \ 69 (u_int32_t)((off) >> AGP_PAGE_SHIFT) * 4, \ 70 (v)); \ 71 } \ 72 } while (0) 73 74 #define CHIP_I810 0 /* i810/i815 */ 75 #define CHIP_I830 1 /* 830M/845G */ 76 #define CHIP_I855 2 /* 852GM/855GM/865G */ 77 #define CHIP_I915 3 /* 915G/915GM/945G/945GM */ 78 79 struct agp_i810_softc { 80 u_int32_t initial_aperture; /* aperture size at startup */ 81 struct agp_gatt *gatt; 82 int chiptype; /* i810-like or i830 */ 83 u_int32_t dcache_size; /* i810 only */ 84 u_int32_t stolen; /* number of i830/845 gtt entries 85 for stolen memory */ 86 bus_space_tag_t bst; /* register bus_space tag */ 87 bus_space_handle_t bsh; /* register bus_space handle */ 88 bus_space_tag_t gtt_bst; /* GTT bus_space tag */ 89 bus_space_handle_t gtt_bsh; /* GTT bus_space handle */ 90 struct pci_attach_args vga_pa; 91 92 struct pci_conf_state sc_pciconf; 93 }; 94 95 static u_int32_t agp_i810_get_aperture(struct agp_softc *); 96 static int agp_i810_set_aperture(struct agp_softc *, u_int32_t); 97 static int agp_i810_bind_page(struct agp_softc *, off_t, bus_addr_t); 98 static int agp_i810_unbind_page(struct agp_softc *, off_t); 99 static void agp_i810_flush_tlb(struct agp_softc *); 100 static int agp_i810_enable(struct agp_softc *, u_int32_t mode); 101 static struct agp_memory *agp_i810_alloc_memory(struct agp_softc *, int, 102 vsize_t); 103 static int agp_i810_free_memory(struct agp_softc *, struct agp_memory *); 104 static int agp_i810_bind_memory(struct agp_softc *, struct agp_memory *, off_t); 105 static int agp_i810_unbind_memory(struct agp_softc *, struct agp_memory *); 106 107 static struct agp_methods agp_i810_methods = { 108 agp_i810_get_aperture, 109 agp_i810_set_aperture, 110 agp_i810_bind_page, 111 agp_i810_unbind_page, 112 agp_i810_flush_tlb, 113 agp_i810_enable, 114 agp_i810_alloc_memory, 115 agp_i810_free_memory, 116 agp_i810_bind_memory, 117 agp_i810_unbind_memory, 118 }; 119 120 /* XXXthorpej -- duplicated code (see arch/i386/pci/pchb.c) */ 121 static int 122 agp_i810_vgamatch(struct pci_attach_args *pa) 123 { 124 125 if (PCI_CLASS(pa->pa_class) != PCI_CLASS_DISPLAY || 126 PCI_SUBCLASS(pa->pa_class) != PCI_SUBCLASS_DISPLAY_VGA) 127 return (0); 128 129 switch (PCI_PRODUCT(pa->pa_id)) { 130 case PCI_PRODUCT_INTEL_82810_GC: 131 case PCI_PRODUCT_INTEL_82810_DC100_GC: 132 case PCI_PRODUCT_INTEL_82810E_GC: 133 case PCI_PRODUCT_INTEL_82815_FULL_GRAPH: 134 case PCI_PRODUCT_INTEL_82830MP_IV: 135 case PCI_PRODUCT_INTEL_82845G_IGD: 136 case PCI_PRODUCT_INTEL_82855GM_IGD: 137 case PCI_PRODUCT_INTEL_82865_IGD: 138 case PCI_PRODUCT_INTEL_82915G_IGD: 139 case PCI_PRODUCT_INTEL_82915GM_IGD: 140 case PCI_PRODUCT_INTEL_82945P_IGD: 141 case PCI_PRODUCT_INTEL_82945GM_IGD: 142 case PCI_PRODUCT_INTEL_82945GM_IGD_1: 143 return (1); 144 } 145 146 return (0); 147 } 148 149 int 150 agp_i810_attach(struct device *parent, struct device *self, void *aux) 151 { 152 struct agp_softc *sc = (void *)self; 153 struct agp_i810_softc *isc; 154 struct agp_gatt *gatt; 155 int error, apbase; 156 bus_size_t mmadrsize; 157 158 isc = malloc(sizeof *isc, M_AGP, M_NOWAIT|M_ZERO); 159 if (isc == NULL) { 160 aprint_error(": can't allocate chipset-specific softc\n"); 161 return ENOMEM; 162 } 163 sc->as_chipc = isc; 164 sc->as_methods = &agp_i810_methods; 165 166 if (pci_find_device(&isc->vga_pa, agp_i810_vgamatch) == 0) { 167 #if NAGP_INTEL > 0 168 const struct pci_attach_args *pa = aux; 169 170 switch (PCI_PRODUCT(pa->pa_id)) { 171 case PCI_PRODUCT_INTEL_82840_HB: 172 case PCI_PRODUCT_INTEL_82865_HB: 173 case PCI_PRODUCT_INTEL_82845G_DRAM: 174 case PCI_PRODUCT_INTEL_82815_FULL_HUB: 175 return agp_intel_attach(parent, self, aux); 176 } 177 #endif 178 aprint_error(": can't find internal VGA device config space\n"); 179 free(isc, M_AGP); 180 return ENOENT; 181 } 182 183 /* XXXfvdl */ 184 sc->as_dmat = isc->vga_pa.pa_dmat; 185 186 switch (PCI_PRODUCT(isc->vga_pa.pa_id)) { 187 case PCI_PRODUCT_INTEL_82810_GC: 188 case PCI_PRODUCT_INTEL_82810_DC100_GC: 189 case PCI_PRODUCT_INTEL_82810E_GC: 190 case PCI_PRODUCT_INTEL_82815_FULL_GRAPH: 191 isc->chiptype = CHIP_I810; 192 break; 193 case PCI_PRODUCT_INTEL_82830MP_IV: 194 case PCI_PRODUCT_INTEL_82845G_IGD: 195 isc->chiptype = CHIP_I830; 196 break; 197 case PCI_PRODUCT_INTEL_82855GM_IGD: 198 case PCI_PRODUCT_INTEL_82865_IGD: 199 isc->chiptype = CHIP_I855; 200 break; 201 case PCI_PRODUCT_INTEL_82915G_IGD: 202 case PCI_PRODUCT_INTEL_82915GM_IGD: 203 case PCI_PRODUCT_INTEL_82945P_IGD: 204 case PCI_PRODUCT_INTEL_82945GM_IGD: 205 case PCI_PRODUCT_INTEL_82945GM_IGD_1: 206 isc->chiptype = CHIP_I915; 207 break; 208 } 209 210 apbase = isc->chiptype == CHIP_I915 ? AGP_I915_GMADR : AGP_I810_GMADR; 211 error = agp_map_aperture(&isc->vga_pa, sc, apbase); 212 if (error != 0) { 213 aprint_error(": can't map aperture\n"); 214 free(isc, M_AGP); 215 return error; 216 } 217 218 if (isc->chiptype == CHIP_I915) { 219 error = pci_mapreg_map(&isc->vga_pa, AGP_I915_MMADR, 220 PCI_MAPREG_TYPE_MEM, 0, &isc->bst, &isc->bsh, 221 NULL, &mmadrsize); 222 if (error != 0) { 223 aprint_error(": can't map mmadr registers\n"); 224 agp_generic_detach(sc); 225 return error; 226 } 227 error = pci_mapreg_map(&isc->vga_pa, AGP_I915_GTTADR, 228 PCI_MAPREG_TYPE_MEM, 0, &isc->gtt_bst, &isc->gtt_bsh, 229 NULL, NULL); 230 if (error != 0) { 231 aprint_error(": can't map gttadr registers\n"); 232 /* XXX we should release mmadr here */ 233 agp_generic_detach(sc); 234 return error; 235 } 236 } else { 237 error = pci_mapreg_map(&isc->vga_pa, AGP_I810_MMADR, 238 PCI_MAPREG_TYPE_MEM, 0, &isc->bst, &isc->bsh, 239 NULL, &mmadrsize); 240 if (error != 0) { 241 aprint_error(": can't map mmadr registers\n"); 242 agp_generic_detach(sc); 243 return error; 244 } 245 } 246 247 isc->initial_aperture = AGP_GET_APERTURE(sc); 248 249 gatt = malloc(sizeof(struct agp_gatt), M_AGP, M_NOWAIT); 250 if (!gatt) { 251 agp_generic_detach(sc); 252 return ENOMEM; 253 } 254 isc->gatt = gatt; 255 256 gatt->ag_entries = AGP_GET_APERTURE(sc) >> AGP_PAGE_SHIFT; 257 258 if (isc->chiptype == CHIP_I810) { 259 void *virtual; 260 int dummyseg; 261 262 /* Some i810s have on-chip memory called dcache */ 263 if (READ1(AGP_I810_DRT) & AGP_I810_DRT_POPULATED) 264 isc->dcache_size = 4 * 1024 * 1024; 265 else 266 isc->dcache_size = 0; 267 268 /* According to the specs the gatt on the i810 must be 64k */ 269 if (agp_alloc_dmamem(sc->as_dmat, 64 * 1024, 270 0, &gatt->ag_dmamap, &virtual, &gatt->ag_physical, 271 &gatt->ag_dmaseg, 1, &dummyseg) != 0) { 272 free(gatt, M_AGP); 273 agp_generic_detach(sc); 274 return ENOMEM; 275 } 276 gatt->ag_virtual = (uint32_t *)virtual; 277 278 gatt->ag_size = gatt->ag_entries * sizeof(u_int32_t); 279 memset(gatt->ag_virtual, 0, gatt->ag_size); 280 281 agp_flush_cache(); 282 /* Install the GATT. */ 283 WRITE4(AGP_I810_PGTBL_CTL, gatt->ag_physical | 1); 284 } else if (isc->chiptype == CHIP_I830) { 285 /* The i830 automatically initializes the 128k gatt on boot. */ 286 pcireg_t reg; 287 u_int32_t pgtblctl; 288 u_int16_t gcc1; 289 290 reg = pci_conf_read(sc->as_pc, sc->as_tag, AGP_I830_GCC0); 291 gcc1 = (u_int16_t)(reg >> 16); 292 switch (gcc1 & AGP_I830_GCC1_GMS) { 293 case AGP_I830_GCC1_GMS_STOLEN_512: 294 isc->stolen = (512 - 132) * 1024 / 4096; 295 break; 296 case AGP_I830_GCC1_GMS_STOLEN_1024: 297 isc->stolen = (1024 - 132) * 1024 / 4096; 298 break; 299 case AGP_I830_GCC1_GMS_STOLEN_8192: 300 isc->stolen = (8192 - 132) * 1024 / 4096; 301 break; 302 default: 303 isc->stolen = 0; 304 aprint_error( 305 ": unknown memory configuration, disabling\n"); 306 agp_generic_detach(sc); 307 return EINVAL; 308 } 309 if (isc->stolen > 0) { 310 aprint_error(": detected %dk stolen memory\n%s", 311 isc->stolen * 4, sc->as_dev.dv_xname); 312 } 313 314 /* GATT address is already in there, make sure it's enabled */ 315 pgtblctl = READ4(AGP_I810_PGTBL_CTL); 316 pgtblctl |= 1; 317 WRITE4(AGP_I810_PGTBL_CTL, pgtblctl); 318 319 gatt->ag_physical = pgtblctl & ~1; 320 } else if (isc->chiptype == CHIP_I855) { 321 /* The 855GM automatically initializes the 128k gatt on boot. */ 322 pcireg_t reg; 323 u_int32_t pgtblctl; 324 u_int16_t gcc1; 325 326 reg = pci_conf_read(sc->as_pc, sc->as_tag, AGP_I855_GCC1); 327 gcc1 = (u_int16_t)(reg >> 16); 328 switch (gcc1 & AGP_I855_GCC1_GMS) { 329 case AGP_I855_GCC1_GMS_STOLEN_1M: 330 isc->stolen = (1024 - 132) * 1024 / 4096; 331 break; 332 case AGP_I855_GCC1_GMS_STOLEN_4M: 333 isc->stolen = (4096 - 132) * 1024 / 4096; 334 break; 335 case AGP_I855_GCC1_GMS_STOLEN_8M: 336 isc->stolen = (8192 - 132) * 1024 / 4096; 337 break; 338 case AGP_I855_GCC1_GMS_STOLEN_16M: 339 isc->stolen = (16384 - 132) * 1024 / 4096; 340 break; 341 case AGP_I855_GCC1_GMS_STOLEN_32M: 342 isc->stolen = (32768 - 132) * 1024 / 4096; 343 break; 344 default: 345 isc->stolen = 0; 346 aprint_error( 347 ": unknown memory configuration, disabling\n"); 348 agp_generic_detach(sc); 349 return EINVAL; 350 } 351 if (isc->stolen > 0) { 352 aprint_error(": detected %dk stolen memory\n%s", 353 isc->stolen * 4, sc->as_dev.dv_xname); 354 } 355 356 /* GATT address is already in there, make sure it's enabled */ 357 pgtblctl = READ4(AGP_I810_PGTBL_CTL); 358 pgtblctl |= 1; 359 WRITE4(AGP_I810_PGTBL_CTL, pgtblctl); 360 361 gatt->ag_physical = pgtblctl & ~1; 362 } else { /* CHIP_I915 */ 363 /* The 915G automatically initializes the 256k gatt on boot. */ 364 pcireg_t reg; 365 u_int32_t pgtblctl; 366 u_int16_t gcc1; 367 368 reg = pci_conf_read(sc->as_pc, sc->as_tag, AGP_I915_GCC1); 369 gcc1 = (u_int16_t)(reg >> 16); 370 switch (gcc1 & AGP_I915_GCC1_GMS) { 371 case AGP_I915_GCC1_GMS_STOLEN_0M: 372 isc->stolen = 0; 373 break; 374 case AGP_I915_GCC1_GMS_STOLEN_1M: 375 isc->stolen = (1024 - 260) * 1024 / 4096; 376 break; 377 case AGP_I915_GCC1_GMS_STOLEN_8M: 378 isc->stolen = (8192 - 260) * 1024 / 4096; 379 break; 380 case AGP_I915_GCC1_GMS_STOLEN_16M: 381 isc->stolen = (16384 - 260) * 1024 / 4096; 382 break; 383 case AGP_I915_GCC1_GMS_STOLEN_32M: 384 isc->stolen = (32768 - 260) * 1024 / 4096; 385 break; 386 case AGP_I915_GCC1_GMS_STOLEN_48M: 387 isc->stolen = (49152 - 260) * 1024 / 4096; 388 break; 389 case AGP_I915_GCC1_GMS_STOLEN_64M: 390 isc->stolen = (65536 - 260) * 1024 / 4096; 391 break; 392 default: 393 isc->stolen = 0; 394 aprint_error( 395 ": unknown memory configuration, disabling\n"); 396 agp_generic_detach(sc); 397 return EINVAL; 398 } 399 if (isc->stolen > 0) { 400 aprint_error(": detected %dk stolen memory\n%s", 401 isc->stolen * 4, sc->as_dev.dv_xname); 402 } 403 404 /* GATT address is already in there, make sure it's enabled */ 405 pgtblctl = READ4(AGP_I810_PGTBL_CTL); 406 pgtblctl |= 1; 407 WRITE4(AGP_I810_PGTBL_CTL, pgtblctl); 408 409 gatt->ag_physical = pgtblctl & ~1; 410 } 411 412 /* 413 * Make sure the chipset can see everything. 414 */ 415 agp_flush_cache(); 416 417 #if 0 418 /* 419 * another device (drm) may need access to this region 420 * we do not need it anymore 421 */ 422 bus_space_unmap(isc->bst, isc->bsh, mmadrsize); 423 #endif 424 425 return 0; 426 } 427 428 #if 0 429 static int 430 agp_i810_detach(struct agp_softc *sc) 431 { 432 int error; 433 struct agp_i810_softc *isc = sc->as_chipc; 434 435 error = agp_generic_detach(sc); 436 if (error) 437 return error; 438 439 /* Clear the GATT base. */ 440 if (sc->chiptype == CHIP_I810) { 441 WRITE4(AGP_I810_PGTBL_CTL, 0); 442 } else { 443 unsigned int pgtblctl; 444 pgtblctl = READ4(AGP_I810_PGTBL_CTL); 445 pgtblctl &= ~1; 446 WRITE4(AGP_I810_PGTBL_CTL, pgtblctl); 447 } 448 449 /* Put the aperture back the way it started. */ 450 AGP_SET_APERTURE(sc, isc->initial_aperture); 451 452 if (sc->chiptype == CHIP_I810) { 453 agp_free_dmamem(sc->as_dmat, gatt->ag_size, gatt->ag_dmamap, 454 (void *)gatt->ag_virtual, &gatt->ag_dmaseg, 1); 455 } 456 free(sc->gatt, M_AGP); 457 458 return 0; 459 } 460 #endif 461 462 static u_int32_t 463 agp_i810_get_aperture(struct agp_softc *sc) 464 { 465 struct agp_i810_softc *isc = sc->as_chipc; 466 pcireg_t reg; 467 468 if (isc->chiptype == CHIP_I810) { 469 u_int16_t miscc; 470 471 reg = pci_conf_read(sc->as_pc, sc->as_tag, AGP_I810_SMRAM); 472 miscc = (u_int16_t)(reg >> 16); 473 if ((miscc & AGP_I810_MISCC_WINSIZE) == 474 AGP_I810_MISCC_WINSIZE_32) 475 return 32 * 1024 * 1024; 476 else 477 return 64 * 1024 * 1024; 478 } else if (isc->chiptype == CHIP_I830) { 479 u_int16_t gcc1; 480 481 reg = pci_conf_read(sc->as_pc, sc->as_tag, AGP_I830_GCC0); 482 gcc1 = (u_int16_t)(reg >> 16); 483 if ((gcc1 & AGP_I830_GCC1_GMASIZE) == AGP_I830_GCC1_GMASIZE_64) 484 return 64 * 1024 * 1024; 485 else 486 return 128 * 1024 * 1024; 487 } else if (isc->chiptype == CHIP_I855) { 488 return 128 * 1024 * 1024; 489 } else { /* CHIP_I915 */ 490 u_int16_t msac; 491 492 reg = pci_conf_read(sc->as_pc, sc->as_tag, AGP_I915_MSAC); 493 msac = (u_int16_t)(reg >> 16); 494 if (msac & AGP_I915_MSAC_APER_128M) 495 return 128 * 1024 * 1024; 496 else 497 return 256 * 1024 * 1024; 498 } 499 } 500 501 static int 502 agp_i810_set_aperture(struct agp_softc *sc, u_int32_t aperture) 503 { 504 struct agp_i810_softc *isc = sc->as_chipc; 505 pcireg_t reg; 506 507 if (isc->chiptype == CHIP_I810) { 508 u_int16_t miscc; 509 510 /* 511 * Double check for sanity. 512 */ 513 if (aperture != (32 * 1024 * 1024) && 514 aperture != (64 * 1024 * 1024)) { 515 printf("%s: bad aperture size %d\n", 516 sc->as_dev.dv_xname, aperture); 517 return EINVAL; 518 } 519 520 reg = pci_conf_read(sc->as_pc, sc->as_tag, AGP_I810_SMRAM); 521 miscc = (u_int16_t)(reg >> 16); 522 miscc &= ~AGP_I810_MISCC_WINSIZE; 523 if (aperture == 32 * 1024 * 1024) 524 miscc |= AGP_I810_MISCC_WINSIZE_32; 525 else 526 miscc |= AGP_I810_MISCC_WINSIZE_64; 527 528 reg &= 0x0000ffff; 529 reg |= ((pcireg_t)miscc) << 16; 530 pci_conf_write(sc->as_pc, sc->as_tag, AGP_I810_SMRAM, reg); 531 } else if (isc->chiptype == CHIP_I830) { 532 u_int16_t gcc1; 533 534 if (aperture != (64 * 1024 * 1024) && 535 aperture != (128 * 1024 * 1024)) { 536 printf("%s: bad aperture size %d\n", 537 sc->as_dev.dv_xname, aperture); 538 return EINVAL; 539 } 540 reg = pci_conf_read(sc->as_pc, sc->as_tag, AGP_I830_GCC0); 541 gcc1 = (u_int16_t)(reg >> 16); 542 gcc1 &= ~AGP_I830_GCC1_GMASIZE; 543 if (aperture == 64 * 1024 * 1024) 544 gcc1 |= AGP_I830_GCC1_GMASIZE_64; 545 else 546 gcc1 |= AGP_I830_GCC1_GMASIZE_128; 547 548 reg &= 0x0000ffff; 549 reg |= ((pcireg_t)gcc1) << 16; 550 pci_conf_write(sc->as_pc, sc->as_tag, AGP_I830_GCC0, reg); 551 } else { /* CHIP_I855 or CHIP_I915 */ 552 if (aperture != agp_i810_get_aperture(sc)) { 553 printf("%s: bad aperture size %d\n", 554 sc->as_dev.dv_xname, aperture); 555 return EINVAL; 556 } 557 } 558 559 return 0; 560 } 561 562 static int 563 agp_i810_bind_page(struct agp_softc *sc, off_t offset, bus_addr_t physical) 564 { 565 struct agp_i810_softc *isc = sc->as_chipc; 566 567 if (offset < 0 || offset >= (isc->gatt->ag_entries << AGP_PAGE_SHIFT)) { 568 #ifdef AGP_DEBUG 569 printf("%s: failed: offset 0x%08x, shift %d, entries %d\n", 570 sc->as_dev.dv_xname, (int)offset, AGP_PAGE_SHIFT, 571 isc->gatt->ag_entries); 572 #endif 573 return EINVAL; 574 } 575 576 if (isc->chiptype != CHIP_I830) { 577 if ((offset >> AGP_PAGE_SHIFT) < isc->stolen) { 578 #ifdef AGP_DEBUG 579 printf("%s: trying to bind into stolen memory", 580 sc->as_dev.dv_xname); 581 #endif 582 return EINVAL; 583 } 584 } 585 586 WRITEGTT(offset, physical | 1); 587 return 0; 588 } 589 590 static int 591 agp_i810_unbind_page(struct agp_softc *sc, off_t offset) 592 { 593 struct agp_i810_softc *isc = sc->as_chipc; 594 595 if (offset < 0 || offset >= (isc->gatt->ag_entries << AGP_PAGE_SHIFT)) 596 return EINVAL; 597 598 if (isc->chiptype != CHIP_I810 ) { 599 if ((offset >> AGP_PAGE_SHIFT) < isc->stolen) { 600 #ifdef AGP_DEBUG 601 printf("%s: trying to unbind from stolen memory", 602 sc->as_dev.dv_xname); 603 #endif 604 return EINVAL; 605 } 606 } 607 608 WRITEGTT(offset, 0); 609 return 0; 610 } 611 612 /* 613 * Writing via memory mapped registers already flushes all TLBs. 614 */ 615 static void 616 agp_i810_flush_tlb(struct agp_softc *sc) 617 { 618 } 619 620 static int 621 agp_i810_enable(struct agp_softc *sc, u_int32_t mode) 622 { 623 624 return 0; 625 } 626 627 static struct agp_memory * 628 agp_i810_alloc_memory(struct agp_softc *sc, int type, vsize_t size) 629 { 630 struct agp_i810_softc *isc = sc->as_chipc; 631 struct agp_memory *mem; 632 633 #ifdef AGP_DEBUG 634 printf("AGP: alloc(%d, 0x%x)\n", type, (int) size); 635 #endif 636 637 if ((size & (AGP_PAGE_SIZE - 1)) != 0) 638 return 0; 639 640 if (sc->as_allocated + size > sc->as_maxmem) 641 return 0; 642 643 if (type == 1) { 644 /* 645 * Mapping local DRAM into GATT. 646 */ 647 if (isc->chiptype != CHIP_I810 ) 648 return 0; 649 if (size != isc->dcache_size) 650 return 0; 651 } else if (type == 2) { 652 /* 653 * Bogus mapping for the hardware cursor. 654 */ 655 if (size != AGP_PAGE_SIZE && size != 4 * AGP_PAGE_SIZE) 656 return 0; 657 } 658 659 mem = malloc(sizeof *mem, M_AGP, M_WAITOK|M_ZERO); 660 if (mem == NULL) 661 return NULL; 662 mem->am_id = sc->as_nextid++; 663 mem->am_size = size; 664 mem->am_type = type; 665 666 if (type == 2) { 667 /* 668 * Allocate and wire down the memory now so that we can 669 * get its physical address. 670 */ 671 mem->am_dmaseg = malloc(sizeof *mem->am_dmaseg, M_AGP, 672 M_WAITOK); 673 if (mem->am_dmaseg == NULL) { 674 free(mem, M_AGP); 675 return NULL; 676 } 677 if (agp_alloc_dmamem(sc->as_dmat, size, 0, 678 &mem->am_dmamap, &mem->am_virtual, &mem->am_physical, 679 mem->am_dmaseg, 1, &mem->am_nseg) != 0) { 680 free(mem->am_dmaseg, M_AGP); 681 free(mem, M_AGP); 682 return NULL; 683 } 684 memset(mem->am_virtual, 0, size); 685 } else if (type != 1) { 686 if (bus_dmamap_create(sc->as_dmat, size, size / PAGE_SIZE + 1, 687 size, 0, BUS_DMA_NOWAIT, 688 &mem->am_dmamap) != 0) { 689 free(mem, M_AGP); 690 return NULL; 691 } 692 } 693 694 TAILQ_INSERT_TAIL(&sc->as_memory, mem, am_link); 695 sc->as_allocated += size; 696 697 return mem; 698 } 699 700 static int 701 agp_i810_free_memory(struct agp_softc *sc, struct agp_memory *mem) 702 { 703 if (mem->am_is_bound) 704 return EBUSY; 705 706 if (mem->am_type == 2) { 707 agp_free_dmamem(sc->as_dmat, mem->am_size, mem->am_dmamap, 708 mem->am_virtual, mem->am_dmaseg, mem->am_nseg); 709 free(mem->am_dmaseg, M_AGP); 710 } 711 712 sc->as_allocated -= mem->am_size; 713 TAILQ_REMOVE(&sc->as_memory, mem, am_link); 714 free(mem, M_AGP); 715 return 0; 716 } 717 718 static int 719 agp_i810_bind_memory(struct agp_softc *sc, struct agp_memory *mem, 720 off_t offset) 721 { 722 struct agp_i810_softc *isc = sc->as_chipc; 723 u_int32_t regval, i; 724 725 /* 726 * XXX evil hack: the PGTBL_CTL appearently gets overwritten by the 727 * X server for mysterious reasons which leads to crashes if we write 728 * to the GTT through the MMIO window. 729 * Until the issue is solved, simply restore it. 730 */ 731 732 #if 0 733 regval = bus_space_read_4(isc->bst, isc->bsh, AGP_I810_PGTBL_CTL); 734 if (regval != (isc->gatt->ag_physical | 1)) { 735 printf("agp_i810_bind_memory: PGTBL_CTL is 0x%x - fixing\n", 736 regval); 737 bus_space_write_4(isc->bst, isc->bsh, AGP_I810_PGTBL_CTL, 738 isc->gatt->ag_physical | 1); 739 } 740 #endif 741 regval = 0; 742 743 if (mem->am_type == 2) { 744 WRITEGTT(offset, mem->am_physical | 1); 745 mem->am_offset = offset; 746 mem->am_is_bound = 1; 747 return 0; 748 } 749 750 if (mem->am_type != 1) 751 return agp_generic_bind_memory(sc, mem, offset); 752 753 if (isc->chiptype != CHIP_I810) 754 return EINVAL; 755 756 for (i = 0; i < mem->am_size; i += AGP_PAGE_SIZE) 757 WRITEGTT(offset, i | 3); 758 mem->am_is_bound = 1; 759 return 0; 760 } 761 762 static int 763 agp_i810_unbind_memory(struct agp_softc *sc, struct agp_memory *mem) 764 { 765 struct agp_i810_softc *isc = sc->as_chipc; 766 u_int32_t i; 767 768 if (mem->am_type == 2) { 769 WRITEGTT(mem->am_offset, 0); 770 mem->am_offset = 0; 771 mem->am_is_bound = 0; 772 return 0; 773 } 774 775 if (mem->am_type != 1) 776 return agp_generic_unbind_memory(sc, mem); 777 778 if (isc->chiptype != CHIP_I810) 779 return EINVAL; 780 781 for (i = 0; i < mem->am_size; i += AGP_PAGE_SIZE) 782 WRITEGTT(i, 0); 783 mem->am_is_bound = 0; 784 return 0; 785 } 786
Indexes created Tue Oct 07 21:09:53 GMT 2025