agp_i810.c revision 1.6
1 /* $NetBSD: agp_i810.c,v 1.6 2001/09/15 00:25:00 thorpej 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 free(isc, M_AGP); 138 return error; 139 } 140 141 error = pci_mapreg_map(&isc->vga_pa, AGP_I810_MMADR, 142 PCI_MAPREG_TYPE_MEM, 0, &isc->bst, &isc->bsh, NULL, NULL); 143 if (error != 0) { 144 printf(": can't map mmadr registers\n"); 145 return error; 146 } 147 148 isc->initial_aperture = AGP_GET_APERTURE(sc); 149 150 if (READ1(AGP_I810_DRT) & AGP_I810_DRT_POPULATED) 151 isc->dcache_size = 4 * 1024 * 1024; 152 else 153 isc->dcache_size = 0; 154 155 for (;;) { 156 gatt = agp_alloc_gatt(sc); 157 if (gatt) 158 break; 159 160 /* 161 * Probably contigmalloc failure. Try reducing the 162 * aperture so that the gatt size reduces. 163 */ 164 if (AGP_SET_APERTURE(sc, AGP_GET_APERTURE(sc) / 2)) { 165 agp_generic_detach(sc); 166 return ENOMEM; 167 } 168 } 169 isc->gatt = gatt; 170 171 /* Install the GATT. */ 172 WRITE4(AGP_I810_PGTBL_CTL, gatt->ag_physical | 1); 173 174 /* 175 * Make sure the chipset can see everything. 176 */ 177 agp_flush_cache(); 178 179 return 0; 180 } 181 182 #if 0 183 static int 184 agp_i810_detach(struct agp_softc *sc) 185 { 186 int error; 187 struct agp_i810_softc *isc = sc->as_chipc; 188 189 error = agp_generic_detach(sc); 190 if (error) 191 return error; 192 193 /* Clear the GATT base. */ 194 WRITE4(AGP_I810_PGTBL_CTL, 0); 195 196 /* Put the aperture back the way it started. */ 197 AGP_SET_APERTURE(sc, isc->initial_aperture); 198 199 agp_free_gatt(sc, isc->gatt); 200 201 return 0; 202 } 203 #endif 204 205 static u_int32_t 206 agp_i810_get_aperture(struct agp_softc *sc) 207 { 208 u_int16_t miscc; 209 210 miscc = pci_conf_read(sc->as_pc, sc->as_tag, AGP_I810_SMRAM) >> 16; 211 if ((miscc & AGP_I810_MISCC_WINSIZE) == AGP_I810_MISCC_WINSIZE_32) 212 return 32 * 1024 * 1024; 213 else 214 return 64 * 1024 * 1024; 215 } 216 217 static int 218 agp_i810_set_aperture(struct agp_softc *sc, u_int32_t aperture) 219 { 220 pcireg_t reg, miscc; 221 222 /* 223 * Double check for sanity. 224 */ 225 if (aperture != 32 * 1024 * 1024 && aperture != 64 * 1024 * 1024) { 226 printf("%s: bad aperture size %d\n", sc->as_dev.dv_xname, 227 aperture); 228 return EINVAL; 229 } 230 231 reg = pci_conf_read(sc->as_pc, sc->as_tag, AGP_I810_SMRAM); 232 miscc = reg >> 16; 233 miscc &= ~AGP_I810_MISCC_WINSIZE; 234 if (aperture == 32 * 1024 * 1024) 235 miscc |= AGP_I810_MISCC_WINSIZE_32; 236 else 237 miscc |= AGP_I810_MISCC_WINSIZE_64; 238 239 reg &= 0x0000ffff; 240 reg |= (miscc << 16); 241 pci_conf_write(sc->as_pc, sc->as_tag, AGP_I810_SMRAM, miscc); 242 243 return 0; 244 } 245 246 static int 247 agp_i810_bind_page(struct agp_softc *sc, off_t offset, bus_addr_t physical) 248 { 249 struct agp_i810_softc *isc = sc->as_chipc; 250 251 if (offset < 0 || offset >= (isc->gatt->ag_entries << AGP_PAGE_SHIFT)) 252 return EINVAL; 253 254 WRITE4(AGP_I810_GTT + (u_int32_t)(offset >> AGP_PAGE_SHIFT) * 4, 255 physical | 1); 256 return 0; 257 } 258 259 static int 260 agp_i810_unbind_page(struct agp_softc *sc, off_t offset) 261 { 262 struct agp_i810_softc *isc = sc->as_chipc; 263 264 if (offset < 0 || offset >= (isc->gatt->ag_entries << AGP_PAGE_SHIFT)) 265 return EINVAL; 266 267 WRITE4(AGP_I810_GTT + (u_int32_t)(offset >> AGP_PAGE_SHIFT) * 4, 0); 268 return 0; 269 } 270 271 /* 272 * Writing via memory mapped registers already flushes all TLBs. 273 */ 274 static void 275 agp_i810_flush_tlb(struct agp_softc *sc) 276 { 277 } 278 279 static int 280 agp_i810_enable(struct agp_softc *sc, u_int32_t mode) 281 { 282 283 return 0; 284 } 285 286 static struct agp_memory * 287 agp_i810_alloc_memory(struct agp_softc *sc, int type, vsize_t size) 288 { 289 struct agp_i810_softc *isc = sc->as_chipc; 290 struct agp_memory *mem; 291 292 if ((size & (AGP_PAGE_SIZE - 1)) != 0) 293 return 0; 294 295 if (sc->as_allocated + size > sc->as_maxmem) 296 return 0; 297 298 if (type == 1) { 299 /* 300 * Mapping local DRAM into GATT. 301 */ 302 if (size != isc->dcache_size) 303 return 0; 304 } else if (type == 2) { 305 /* 306 * Bogus mapping of a single page for the hardware cursor. 307 */ 308 if (size != AGP_PAGE_SIZE) 309 return 0; 310 } 311 312 mem = malloc(sizeof *mem, M_AGP, M_WAITOK); 313 if (mem == NULL) 314 return NULL; 315 memset(mem, 0, sizeof *mem); 316 mem->am_id = sc->as_nextid++; 317 mem->am_size = size; 318 mem->am_type = type; 319 320 if (type == 2) { 321 /* 322 * Allocate and wire down the page now so that we can 323 * get its physical address. 324 */ 325 mem->am_dmaseg = malloc(sizeof *mem->am_dmaseg, M_AGP, 326 M_WAITOK); 327 if (mem->am_dmaseg == NULL) { 328 free(mem, M_AGP); 329 return NULL; 330 } 331 if (agp_alloc_dmamem(sc->as_dmat, size, 0, 332 &mem->am_dmamap, &mem->am_virtual, &mem->am_physical, 333 mem->am_dmaseg, 1, &mem->am_nseg) != 0) { 334 free(mem->am_dmaseg, M_AGP); 335 free(mem, M_AGP); 336 return NULL; 337 } 338 } else if (type != 1) { 339 if (bus_dmamap_create(sc->as_dmat, size, size / PAGE_SIZE + 1, 340 size, 0, BUS_DMA_NOWAIT, 341 &mem->am_dmamap) != 0) { 342 free(mem, M_AGP); 343 return NULL; 344 } 345 } 346 347 TAILQ_INSERT_TAIL(&sc->as_memory, mem, am_link); 348 sc->as_allocated += size; 349 350 return mem; 351 } 352 353 static int 354 agp_i810_free_memory(struct agp_softc *sc, struct agp_memory *mem) 355 { 356 if (mem->am_is_bound) 357 return EBUSY; 358 359 if (mem->am_type == 2) { 360 agp_free_dmamem(sc->as_dmat, mem->am_size, mem->am_dmamap, 361 mem->am_virtual, mem->am_dmaseg, mem->am_nseg); 362 free(mem->am_dmaseg, M_AGP); 363 } 364 365 sc->as_allocated -= mem->am_size; 366 TAILQ_REMOVE(&sc->as_memory, mem, am_link); 367 free(mem, M_AGP); 368 return 0; 369 } 370 371 static int 372 agp_i810_bind_memory(struct agp_softc *sc, struct agp_memory *mem, 373 off_t offset) 374 { 375 struct agp_i810_softc *isc = sc->as_chipc; 376 u_int32_t regval, i; 377 378 /* 379 * XXX evil hack: the PGTBL_CTL appearently gets overwritten by the 380 * X server for mysterious reasons which leads to crashes if we write 381 * to the GTT through the MMIO window. 382 * Until the issue is solved, simply restore it. 383 */ 384 regval = bus_space_read_4(isc->bst, isc->bsh, AGP_I810_PGTBL_CTL); 385 if (regval != (isc->gatt->ag_physical | 1)) { 386 printf("agp_i810_bind_memory: PGTBL_CTL is 0x%x - fixing\n", 387 regval); 388 bus_space_write_4(isc->bst, isc->bsh, AGP_I810_PGTBL_CTL, 389 isc->gatt->ag_physical | 1); 390 } 391 392 if (mem->am_type == 2) { 393 WRITE4(AGP_I810_GTT + (u_int32_t)(offset >> AGP_PAGE_SHIFT) * 4, 394 mem->am_physical | 1); 395 mem->am_offset = offset; 396 mem->am_is_bound = 1; 397 return 0; 398 } 399 400 if (mem->am_type != 1) 401 return agp_generic_bind_memory(sc, mem, offset); 402 403 for (i = 0; i < mem->am_size; i += AGP_PAGE_SIZE) { 404 WRITE4(AGP_I810_GTT + (u_int32_t)(offset >> AGP_PAGE_SHIFT) * 4, 405 i | 3); 406 } 407 408 return 0; 409 } 410 411 static int 412 agp_i810_unbind_memory(struct agp_softc *sc, struct agp_memory *mem) 413 { 414 struct agp_i810_softc *isc = sc->as_chipc; 415 u_int32_t i; 416 417 if (mem->am_type == 2) { 418 WRITE4(AGP_I810_GTT + 419 (u_int32_t)(mem->am_offset >> AGP_PAGE_SHIFT) * 4, 420 0); 421 mem->am_offset = 0; 422 mem->am_is_bound = 0; 423 return 0; 424 } 425 426 if (mem->am_type != 1) 427 return agp_generic_unbind_memory(sc, mem); 428 429 for (i = 0; i < mem->am_size; i += AGP_PAGE_SIZE) 430 WRITE4(AGP_I810_GTT + (i >> AGP_PAGE_SHIFT) * 4, 0); 431 432 return 0; 433 } 434
Indexes created Tue Sep 23 07:09:52 GMT 2025