agp_i810.c revision 1.10
1 /* $NetBSD: agp_i810.c,v 1.10 2002/01/12 16:17:05 tsutsui 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 1.10 2002/01/12 16:17:05 tsutsui 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 #define READ1(off) bus_space_read_1(isc->bst, isc->bsh, off) 57 #define WRITE4(off,v) bus_space_write_4(isc->bst, isc->bsh, off, v) 58 59 struct agp_i810_softc { 60 u_int32_t initial_aperture; /* aperture size at startup */ 61 struct agp_gatt *gatt; 62 u_int32_t dcache_size; 63 bus_space_tag_t bst; /* bus_space tag */ 64 bus_space_handle_t bsh; /* bus_space handle */ 65 struct pci_attach_args vga_pa; 66 }; 67 68 static u_int32_t agp_i810_get_aperture(struct agp_softc *); 69 static int agp_i810_set_aperture(struct agp_softc *, u_int32_t); 70 static int agp_i810_bind_page(struct agp_softc *, off_t, bus_addr_t); 71 static int agp_i810_unbind_page(struct agp_softc *, off_t); 72 static void agp_i810_flush_tlb(struct agp_softc *); 73 static int agp_i810_enable(struct agp_softc *, u_int32_t mode); 74 static struct agp_memory *agp_i810_alloc_memory(struct agp_softc *, int, 75 vsize_t); 76 static int agp_i810_free_memory(struct agp_softc *, struct agp_memory *); 77 static int agp_i810_bind_memory(struct agp_softc *, struct agp_memory *, off_t); 78 static int agp_i810_unbind_memory(struct agp_softc *, struct agp_memory *); 79 80 struct agp_methods agp_i810_methods = { 81 agp_i810_get_aperture, 82 agp_i810_set_aperture, 83 agp_i810_bind_page, 84 agp_i810_unbind_page, 85 agp_i810_flush_tlb, 86 agp_i810_enable, 87 agp_i810_alloc_memory, 88 agp_i810_free_memory, 89 agp_i810_bind_memory, 90 agp_i810_unbind_memory, 91 }; 92 93 /* XXXthorpej -- duplicated code (see arch/i386/pci/pchb.c) */ 94 static int 95 agp_i810_vgamatch(struct pci_attach_args *pa) 96 { 97 98 if (PCI_CLASS(pa->pa_class) != PCI_CLASS_DISPLAY || 99 PCI_SUBCLASS(pa->pa_class) != PCI_SUBCLASS_DISPLAY_VGA) 100 return (0); 101 102 switch (PCI_PRODUCT(pa->pa_id)) { 103 case PCI_PRODUCT_INTEL_82810_GC: 104 case PCI_PRODUCT_INTEL_82810_DC100_GC: 105 case PCI_PRODUCT_INTEL_82810E_GC: 106 case PCI_PRODUCT_INTEL_82815_FULL_GRAPH: 107 return (1); 108 } 109 110 return (0); 111 } 112 113 int 114 agp_i810_attach(struct device *parent, struct device *self, void *aux) 115 { 116 struct agp_softc *sc = (void *)self; 117 struct agp_i810_softc *isc; 118 struct agp_gatt *gatt; 119 int error; 120 121 isc = malloc(sizeof *isc, M_AGP, M_NOWAIT|M_ZERO); 122 if (isc == NULL) { 123 printf(": can't allocate chipset-specific softc\n"); 124 return ENOMEM; 125 } 126 sc->as_chipc = isc; 127 sc->as_methods = &agp_i810_methods; 128 129 if (pci_find_device(&isc->vga_pa, agp_i810_vgamatch) == 0) { 130 printf(": can't find internal VGA device config space\n"); 131 free(isc, M_AGP); 132 return ENOENT; 133 } 134 135 /* XXXfvdl */ 136 sc->as_dmat = isc->vga_pa.pa_dmat; 137 138 error = agp_map_aperture(&isc->vga_pa, sc); 139 if (error != 0) { 140 printf(": can't map aperture\n"); 141 free(isc, M_AGP); 142 return error; 143 } 144 145 error = pci_mapreg_map(&isc->vga_pa, AGP_I810_MMADR, 146 PCI_MAPREG_TYPE_MEM, 0, &isc->bst, &isc->bsh, NULL, NULL); 147 if (error != 0) { 148 printf(": can't map mmadr registers\n"); 149 return error; 150 } 151 152 isc->initial_aperture = AGP_GET_APERTURE(sc); 153 154 if (READ1(AGP_I810_DRT) & AGP_I810_DRT_POPULATED) 155 isc->dcache_size = 4 * 1024 * 1024; 156 else 157 isc->dcache_size = 0; 158 159 for (;;) { 160 gatt = agp_alloc_gatt(sc); 161 if (gatt) 162 break; 163 164 /* 165 * Probably contigmalloc failure. Try reducing the 166 * aperture so that the gatt size reduces. 167 */ 168 if (AGP_SET_APERTURE(sc, AGP_GET_APERTURE(sc) / 2)) { 169 agp_generic_detach(sc); 170 return ENOMEM; 171 } 172 } 173 isc->gatt = gatt; 174 175 /* Install the GATT. */ 176 WRITE4(AGP_I810_PGTBL_CTL, gatt->ag_physical | 1); 177 178 /* 179 * Make sure the chipset can see everything. 180 */ 181 agp_flush_cache(); 182 183 return 0; 184 } 185 186 #if 0 187 static int 188 agp_i810_detach(struct agp_softc *sc) 189 { 190 int error; 191 struct agp_i810_softc *isc = sc->as_chipc; 192 193 error = agp_generic_detach(sc); 194 if (error) 195 return error; 196 197 /* Clear the GATT base. */ 198 WRITE4(AGP_I810_PGTBL_CTL, 0); 199 200 /* Put the aperture back the way it started. */ 201 AGP_SET_APERTURE(sc, isc->initial_aperture); 202 203 agp_free_gatt(sc, isc->gatt); 204 205 return 0; 206 } 207 #endif 208 209 static u_int32_t 210 agp_i810_get_aperture(struct agp_softc *sc) 211 { 212 u_int16_t miscc; 213 214 miscc = pci_conf_read(sc->as_pc, sc->as_tag, AGP_I810_SMRAM) >> 16; 215 if ((miscc & AGP_I810_MISCC_WINSIZE) == AGP_I810_MISCC_WINSIZE_32) 216 return 32 * 1024 * 1024; 217 else 218 return 64 * 1024 * 1024; 219 } 220 221 static int 222 agp_i810_set_aperture(struct agp_softc *sc, u_int32_t aperture) 223 { 224 pcireg_t reg, miscc; 225 226 /* 227 * Double check for sanity. 228 */ 229 if (aperture != 32 * 1024 * 1024 && aperture != 64 * 1024 * 1024) { 230 printf("%s: bad aperture size %d\n", sc->as_dev.dv_xname, 231 aperture); 232 return EINVAL; 233 } 234 235 reg = pci_conf_read(sc->as_pc, sc->as_tag, AGP_I810_SMRAM); 236 miscc = reg >> 16; 237 miscc &= ~AGP_I810_MISCC_WINSIZE; 238 if (aperture == 32 * 1024 * 1024) 239 miscc |= AGP_I810_MISCC_WINSIZE_32; 240 else 241 miscc |= AGP_I810_MISCC_WINSIZE_64; 242 243 reg &= 0x0000ffff; 244 reg |= (miscc << 16); 245 pci_conf_write(sc->as_pc, sc->as_tag, AGP_I810_SMRAM, miscc); 246 247 return 0; 248 } 249 250 static int 251 agp_i810_bind_page(struct agp_softc *sc, off_t offset, bus_addr_t physical) 252 { 253 struct agp_i810_softc *isc = sc->as_chipc; 254 255 if (offset < 0 || offset >= (isc->gatt->ag_entries << AGP_PAGE_SHIFT)) 256 return EINVAL; 257 258 WRITE4(AGP_I810_GTT + (u_int32_t)(offset >> AGP_PAGE_SHIFT) * 4, 259 physical | 1); 260 return 0; 261 } 262 263 static int 264 agp_i810_unbind_page(struct agp_softc *sc, off_t offset) 265 { 266 struct agp_i810_softc *isc = sc->as_chipc; 267 268 if (offset < 0 || offset >= (isc->gatt->ag_entries << AGP_PAGE_SHIFT)) 269 return EINVAL; 270 271 WRITE4(AGP_I810_GTT + (u_int32_t)(offset >> AGP_PAGE_SHIFT) * 4, 0); 272 return 0; 273 } 274 275 /* 276 * Writing via memory mapped registers already flushes all TLBs. 277 */ 278 static void 279 agp_i810_flush_tlb(struct agp_softc *sc) 280 { 281 } 282 283 static int 284 agp_i810_enable(struct agp_softc *sc, u_int32_t mode) 285 { 286 287 return 0; 288 } 289 290 static struct agp_memory * 291 agp_i810_alloc_memory(struct agp_softc *sc, int type, vsize_t size) 292 { 293 struct agp_i810_softc *isc = sc->as_chipc; 294 struct agp_memory *mem; 295 296 if ((size & (AGP_PAGE_SIZE - 1)) != 0) 297 return 0; 298 299 if (sc->as_allocated + size > sc->as_maxmem) 300 return 0; 301 302 if (type == 1) { 303 /* 304 * Mapping local DRAM into GATT. 305 */ 306 if (size != isc->dcache_size) 307 return 0; 308 } else if (type == 2) { 309 /* 310 * Bogus mapping of a single page for the hardware cursor. 311 */ 312 if (size != AGP_PAGE_SIZE) 313 return 0; 314 } 315 316 mem = malloc(sizeof *mem, M_AGP, M_WAITOK|M_ZERO); 317 if (mem == NULL) 318 return NULL; 319 mem->am_id = sc->as_nextid++; 320 mem->am_size = size; 321 mem->am_type = type; 322 323 if (type == 2) { 324 /* 325 * Allocate and wire down the page now so that we can 326 * get its physical address. 327 */ 328 mem->am_dmaseg = malloc(sizeof *mem->am_dmaseg, M_AGP, 329 M_WAITOK); 330 if (mem->am_dmaseg == NULL) { 331 free(mem, M_AGP); 332 return NULL; 333 } 334 if (agp_alloc_dmamem(sc->as_dmat, size, 0, 335 &mem->am_dmamap, &mem->am_virtual, &mem->am_physical, 336 mem->am_dmaseg, 1, &mem->am_nseg) != 0) { 337 free(mem->am_dmaseg, M_AGP); 338 free(mem, M_AGP); 339 return NULL; 340 } 341 } else if (type != 1) { 342 if (bus_dmamap_create(sc->as_dmat, size, size / PAGE_SIZE + 1, 343 size, 0, BUS_DMA_NOWAIT, 344 &mem->am_dmamap) != 0) { 345 free(mem, M_AGP); 346 return NULL; 347 } 348 } 349 350 TAILQ_INSERT_TAIL(&sc->as_memory, mem, am_link); 351 sc->as_allocated += size; 352 353 return mem; 354 } 355 356 static int 357 agp_i810_free_memory(struct agp_softc *sc, struct agp_memory *mem) 358 { 359 if (mem->am_is_bound) 360 return EBUSY; 361 362 if (mem->am_type == 2) { 363 agp_free_dmamem(sc->as_dmat, mem->am_size, mem->am_dmamap, 364 mem->am_virtual, mem->am_dmaseg, mem->am_nseg); 365 free(mem->am_dmaseg, M_AGP); 366 } 367 368 sc->as_allocated -= mem->am_size; 369 TAILQ_REMOVE(&sc->as_memory, mem, am_link); 370 free(mem, M_AGP); 371 return 0; 372 } 373 374 static int 375 agp_i810_bind_memory(struct agp_softc *sc, struct agp_memory *mem, 376 off_t offset) 377 { 378 struct agp_i810_softc *isc = sc->as_chipc; 379 u_int32_t regval, i; 380 381 /* 382 * XXX evil hack: the PGTBL_CTL appearently gets overwritten by the 383 * X server for mysterious reasons which leads to crashes if we write 384 * to the GTT through the MMIO window. 385 * Until the issue is solved, simply restore it. 386 */ 387 regval = bus_space_read_4(isc->bst, isc->bsh, AGP_I810_PGTBL_CTL); 388 if (regval != (isc->gatt->ag_physical | 1)) { 389 printf("agp_i810_bind_memory: PGTBL_CTL is 0x%x - fixing\n", 390 regval); 391 bus_space_write_4(isc->bst, isc->bsh, AGP_I810_PGTBL_CTL, 392 isc->gatt->ag_physical | 1); 393 } 394 395 if (mem->am_type == 2) { 396 WRITE4(AGP_I810_GTT + (u_int32_t)(offset >> AGP_PAGE_SHIFT) * 4, 397 mem->am_physical | 1); 398 mem->am_offset = offset; 399 mem->am_is_bound = 1; 400 return 0; 401 } 402 403 if (mem->am_type != 1) 404 return agp_generic_bind_memory(sc, mem, offset); 405 406 for (i = 0; i < mem->am_size; i += AGP_PAGE_SIZE) { 407 WRITE4(AGP_I810_GTT + (u_int32_t)(offset >> AGP_PAGE_SHIFT) * 4, 408 i | 3); 409 } 410 411 return 0; 412 } 413 414 static int 415 agp_i810_unbind_memory(struct agp_softc *sc, struct agp_memory *mem) 416 { 417 struct agp_i810_softc *isc = sc->as_chipc; 418 u_int32_t i; 419 420 if (mem->am_type == 2) { 421 WRITE4(AGP_I810_GTT + 422 (u_int32_t)(mem->am_offset >> AGP_PAGE_SHIFT) * 4, 423 0); 424 mem->am_offset = 0; 425 mem->am_is_bound = 0; 426 return 0; 427 } 428 429 if (mem->am_type != 1) 430 return agp_generic_unbind_memory(sc, mem); 431 432 for (i = 0; i < mem->am_size; i += AGP_PAGE_SIZE) 433 WRITE4(AGP_I810_GTT + (i >> AGP_PAGE_SHIFT) * 4, 0); 434 435 return 0; 436 } 437
Indexes created Wed Sep 24 22:09:59 GMT 2025