agp_i810.c revision 1.7
1 /* $NetBSD: agp_i810.c,v 1.7 2001/09/15 13:01:45 drochner 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/param.h> 33 #include <sys/systm.h> 34 #include <sys/malloc.h> 35 #include <sys/kernel.h> 36 #include <sys/lock.h> 37 #include <sys/proc.h> 38 #include <sys/device.h> 39 #include <sys/conf.h> 40 41 #include <uvm/uvm_extern.h> 42 43 #include <dev/pci/pcivar.h> 44 #include <dev/pci/pcireg.h> 45 #include <dev/pci/pcidevs.h> 46 #include <dev/pci/agpvar.h> 47 #include <dev/pci/agpreg.h> 48 49 #include <sys/agpio.h> 50 51 #include <machine/bus.h> 52 53 #define READ1(off) bus_space_read_1(isc->bst, isc->bsh, off) 54 #define WRITE4(off,v) bus_space_write_4(isc->bst, isc->bsh, off, v) 55 56 struct agp_i810_softc { 57 u_int32_t initial_aperture; /* aperture size at startup */ 58 struct agp_gatt *gatt; 59 u_int32_t dcache_size; 60 bus_space_tag_t bst; /* bus_space tag */ 61 bus_space_handle_t bsh; /* bus_space handle */ 62 struct pci_attach_args vga_pa; 63 }; 64 65 static u_int32_t agp_i810_get_aperture(struct agp_softc *); 66 static int agp_i810_set_aperture(struct agp_softc *, u_int32_t); 67 static int agp_i810_bind_page(struct agp_softc *, off_t, bus_addr_t); 68 static int agp_i810_unbind_page(struct agp_softc *, off_t); 69 static void agp_i810_flush_tlb(struct agp_softc *); 70 static int agp_i810_enable(struct agp_softc *, u_int32_t mode); 71 static struct agp_memory *agp_i810_alloc_memory(struct agp_softc *, int, 72 vsize_t); 73 static int agp_i810_free_memory(struct agp_softc *, struct agp_memory *); 74 static int agp_i810_bind_memory(struct agp_softc *, struct agp_memory *, off_t); 75 static int agp_i810_unbind_memory(struct agp_softc *, struct agp_memory *); 76 77 struct agp_methods agp_i810_methods = { 78 agp_i810_get_aperture, 79 agp_i810_set_aperture, 80 agp_i810_bind_page, 81 agp_i810_unbind_page, 82 agp_i810_flush_tlb, 83 agp_i810_enable, 84 agp_i810_alloc_memory, 85 agp_i810_free_memory, 86 agp_i810_bind_memory, 87 agp_i810_unbind_memory, 88 }; 89 90 /* XXXthorpej -- duplicated code (see arch/i386/pci/pchb.c) */ 91 static int 92 agp_i810_vgamatch(struct pci_attach_args *pa) 93 { 94 95 if (PCI_CLASS(pa->pa_class) != PCI_CLASS_DISPLAY || 96 PCI_SUBCLASS(pa->pa_class) != PCI_SUBCLASS_DISPLAY_VGA) 97 return (0); 98 99 switch (PCI_PRODUCT(pa->pa_id)) { 100 case PCI_PRODUCT_INTEL_82810_GC: 101 case PCI_PRODUCT_INTEL_82810_DC100_GC: 102 case PCI_PRODUCT_INTEL_82810E_GC: 103 case PCI_PRODUCT_INTEL_82815_FULL_GRAPH: 104 return (1); 105 } 106 107 return (0); 108 } 109 110 int 111 agp_i810_attach(struct device *parent, struct device *self, void *aux) 112 { 113 struct agp_softc *sc = (void *)self; 114 struct agp_i810_softc *isc; 115 struct agp_gatt *gatt; 116 int error; 117 118 isc = malloc(sizeof *isc, M_AGP, M_NOWAIT); 119 if (isc == NULL) { 120 printf(": can't allocate chipset-specific softc\n"); 121 return ENOMEM; 122 } 123 memset(isc, 0, sizeof *isc); 124 sc->as_chipc = isc; 125 sc->as_methods = &agp_i810_methods; 126 127 if (pci_find_device(&isc->vga_pa, agp_i810_vgamatch) == 0) { 128 free(isc, M_AGP); 129 return ENOENT; 130 } 131 132 /* XXXfvdl */ 133 sc->as_dmat = isc->vga_pa.pa_dmat; 134 135 error = agp_map_aperture(&isc->vga_pa, sc); 136 if (error != 0) { 137 printf(": can't map aperture\n"); 138 free(isc, M_AGP); 139 return error; 140 } 141 142 error = pci_mapreg_map(&isc->vga_pa, AGP_I810_MMADR, 143 PCI_MAPREG_TYPE_MEM, 0, &isc->bst, &isc->bsh, NULL, NULL); 144 if (error != 0) { 145 printf(": can't map mmadr registers\n"); 146 return error; 147 } 148 149 isc->initial_aperture = AGP_GET_APERTURE(sc); 150 151 if (READ1(AGP_I810_DRT) & AGP_I810_DRT_POPULATED) 152 isc->dcache_size = 4 * 1024 * 1024; 153 else 154 isc->dcache_size = 0; 155 156 for (;;) { 157 gatt = agp_alloc_gatt(sc); 158 if (gatt) 159 break; 160 161 /* 162 * Probably contigmalloc failure. Try reducing the 163 * aperture so that the gatt size reduces. 164 */ 165 if (AGP_SET_APERTURE(sc, AGP_GET_APERTURE(sc) / 2)) { 166 agp_generic_detach(sc); 167 return ENOMEM; 168 } 169 } 170 isc->gatt = gatt; 171 172 /* Install the GATT. */ 173 WRITE4(AGP_I810_PGTBL_CTL, gatt->ag_physical | 1); 174 175 /* 176 * Make sure the chipset can see everything. 177 */ 178 agp_flush_cache(); 179 180 return 0; 181 } 182 183 #if 0 184 static int 185 agp_i810_detach(struct agp_softc *sc) 186 { 187 int error; 188 struct agp_i810_softc *isc = sc->as_chipc; 189 190 error = agp_generic_detach(sc); 191 if (error) 192 return error; 193 194 /* Clear the GATT base. */ 195 WRITE4(AGP_I810_PGTBL_CTL, 0); 196 197 /* Put the aperture back the way it started. */ 198 AGP_SET_APERTURE(sc, isc->initial_aperture); 199 200 agp_free_gatt(sc, isc->gatt); 201 202 return 0; 203 } 204 #endif 205 206 static u_int32_t 207 agp_i810_get_aperture(struct agp_softc *sc) 208 { 209 u_int16_t miscc; 210 211 miscc = pci_conf_read(sc->as_pc, sc->as_tag, AGP_I810_SMRAM) >> 16; 212 if ((miscc & AGP_I810_MISCC_WINSIZE) == AGP_I810_MISCC_WINSIZE_32) 213 return 32 * 1024 * 1024; 214 else 215 return 64 * 1024 * 1024; 216 } 217 218 static int 219 agp_i810_set_aperture(struct agp_softc *sc, u_int32_t aperture) 220 { 221 pcireg_t reg, miscc; 222 223 /* 224 * Double check for sanity. 225 */ 226 if (aperture != 32 * 1024 * 1024 && aperture != 64 * 1024 * 1024) { 227 printf("%s: bad aperture size %d\n", sc->as_dev.dv_xname, 228 aperture); 229 return EINVAL; 230 } 231 232 reg = pci_conf_read(sc->as_pc, sc->as_tag, AGP_I810_SMRAM); 233 miscc = reg >> 16; 234 miscc &= ~AGP_I810_MISCC_WINSIZE; 235 if (aperture == 32 * 1024 * 1024) 236 miscc |= AGP_I810_MISCC_WINSIZE_32; 237 else 238 miscc |= AGP_I810_MISCC_WINSIZE_64; 239 240 reg &= 0x0000ffff; 241 reg |= (miscc << 16); 242 pci_conf_write(sc->as_pc, sc->as_tag, AGP_I810_SMRAM, miscc); 243 244 return 0; 245 } 246 247 static int 248 agp_i810_bind_page(struct agp_softc *sc, off_t offset, bus_addr_t physical) 249 { 250 struct agp_i810_softc *isc = sc->as_chipc; 251 252 if (offset < 0 || offset >= (isc->gatt->ag_entries << AGP_PAGE_SHIFT)) 253 return EINVAL; 254 255 WRITE4(AGP_I810_GTT + (u_int32_t)(offset >> AGP_PAGE_SHIFT) * 4, 256 physical | 1); 257 return 0; 258 } 259 260 static int 261 agp_i810_unbind_page(struct agp_softc *sc, off_t offset) 262 { 263 struct agp_i810_softc *isc = sc->as_chipc; 264 265 if (offset < 0 || offset >= (isc->gatt->ag_entries << AGP_PAGE_SHIFT)) 266 return EINVAL; 267 268 WRITE4(AGP_I810_GTT + (u_int32_t)(offset >> AGP_PAGE_SHIFT) * 4, 0); 269 return 0; 270 } 271 272 /* 273 * Writing via memory mapped registers already flushes all TLBs. 274 */ 275 static void 276 agp_i810_flush_tlb(struct agp_softc *sc) 277 { 278 } 279 280 static int 281 agp_i810_enable(struct agp_softc *sc, u_int32_t mode) 282 { 283 284 return 0; 285 } 286 287 static struct agp_memory * 288 agp_i810_alloc_memory(struct agp_softc *sc, int type, vsize_t size) 289 { 290 struct agp_i810_softc *isc = sc->as_chipc; 291 struct agp_memory *mem; 292 293 if ((size & (AGP_PAGE_SIZE - 1)) != 0) 294 return 0; 295 296 if (sc->as_allocated + size > sc->as_maxmem) 297 return 0; 298 299 if (type == 1) { 300 /* 301 * Mapping local DRAM into GATT. 302 */ 303 if (size != isc->dcache_size) 304 return 0; 305 } else if (type == 2) { 306 /* 307 * Bogus mapping of a single page for the hardware cursor. 308 */ 309 if (size != AGP_PAGE_SIZE) 310 return 0; 311 } 312 313 mem = malloc(sizeof *mem, M_AGP, M_WAITOK); 314 if (mem == NULL) 315 return NULL; 316 memset(mem, 0, sizeof *mem); 317 mem->am_id = sc->as_nextid++; 318 mem->am_size = size; 319 mem->am_type = type; 320 321 if (type == 2) { 322 /* 323 * Allocate and wire down the page now so that we can 324 * get its physical address. 325 */ 326 mem->am_dmaseg = malloc(sizeof *mem->am_dmaseg, M_AGP, 327 M_WAITOK); 328 if (mem->am_dmaseg == NULL) { 329 free(mem, M_AGP); 330 return NULL; 331 } 332 if (agp_alloc_dmamem(sc->as_dmat, size, 0, 333 &mem->am_dmamap, &mem->am_virtual, &mem->am_physical, 334 mem->am_dmaseg, 1, &mem->am_nseg) != 0) { 335 free(mem->am_dmaseg, M_AGP); 336 free(mem, M_AGP); 337 return NULL; 338 } 339 } else if (type != 1) { 340 if (bus_dmamap_create(sc->as_dmat, size, size / PAGE_SIZE + 1, 341 size, 0, BUS_DMA_NOWAIT, 342 &mem->am_dmamap) != 0) { 343 free(mem, M_AGP); 344 return NULL; 345 } 346 } 347 348 TAILQ_INSERT_TAIL(&sc->as_memory, mem, am_link); 349 sc->as_allocated += size; 350 351 return mem; 352 } 353 354 static int 355 agp_i810_free_memory(struct agp_softc *sc, struct agp_memory *mem) 356 { 357 if (mem->am_is_bound) 358 return EBUSY; 359 360 if (mem->am_type == 2) { 361 agp_free_dmamem(sc->as_dmat, mem->am_size, mem->am_dmamap, 362 mem->am_virtual, mem->am_dmaseg, mem->am_nseg); 363 free(mem->am_dmaseg, M_AGP); 364 } 365 366 sc->as_allocated -= mem->am_size; 367 TAILQ_REMOVE(&sc->as_memory, mem, am_link); 368 free(mem, M_AGP); 369 return 0; 370 } 371 372 static int 373 agp_i810_bind_memory(struct agp_softc *sc, struct agp_memory *mem, 374 off_t offset) 375 { 376 struct agp_i810_softc *isc = sc->as_chipc; 377 u_int32_t regval, i; 378 379 /* 380 * XXX evil hack: the PGTBL_CTL appearently gets overwritten by the 381 * X server for mysterious reasons which leads to crashes if we write 382 * to the GTT through the MMIO window. 383 * Until the issue is solved, simply restore it. 384 */ 385 regval = bus_space_read_4(isc->bst, isc->bsh, AGP_I810_PGTBL_CTL); 386 if (regval != (isc->gatt->ag_physical | 1)) { 387 printf("agp_i810_bind_memory: PGTBL_CTL is 0x%x - fixing\n", 388 regval); 389 bus_space_write_4(isc->bst, isc->bsh, AGP_I810_PGTBL_CTL, 390 isc->gatt->ag_physical | 1); 391 } 392 393 if (mem->am_type == 2) { 394 WRITE4(AGP_I810_GTT + (u_int32_t)(offset >> AGP_PAGE_SHIFT) * 4, 395 mem->am_physical | 1); 396 mem->am_offset = offset; 397 mem->am_is_bound = 1; 398 return 0; 399 } 400 401 if (mem->am_type != 1) 402 return agp_generic_bind_memory(sc, mem, offset); 403 404 for (i = 0; i < mem->am_size; i += AGP_PAGE_SIZE) { 405 WRITE4(AGP_I810_GTT + (u_int32_t)(offset >> AGP_PAGE_SHIFT) * 4, 406 i | 3); 407 } 408 409 return 0; 410 } 411 412 static int 413 agp_i810_unbind_memory(struct agp_softc *sc, struct agp_memory *mem) 414 { 415 struct agp_i810_softc *isc = sc->as_chipc; 416 u_int32_t i; 417 418 if (mem->am_type == 2) { 419 WRITE4(AGP_I810_GTT + 420 (u_int32_t)(mem->am_offset >> AGP_PAGE_SHIFT) * 4, 421 0); 422 mem->am_offset = 0; 423 mem->am_is_bound = 0; 424 return 0; 425 } 426 427 if (mem->am_type != 1) 428 return agp_generic_unbind_memory(sc, mem); 429 430 for (i = 0; i < mem->am_size; i += AGP_PAGE_SIZE) 431 WRITE4(AGP_I810_GTT + (i >> AGP_PAGE_SHIFT) * 4, 0); 432 433 return 0; 434 } 435
Indexes created Tue Oct 07 21:09:53 GMT 2025