agp_intel.c revision 1.28
1 /* $NetBSD: agp_intel.c,v 1.28 2008/02/15 13:28:25 gson 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_intel.c,v 1.4 2001/07/05 21:28:47 jhb Exp $ 29 */ 30 31 #include <sys/cdefs.h> 32 __KERNEL_RCSID(0, "$NetBSD: agp_intel.c,v 1.28 2008/02/15 13:28:25 gson Exp $"); 33 34 #include <sys/param.h> 35 #include <sys/systm.h> 36 #include <sys/malloc.h> 37 #include <sys/kernel.h> 38 #include <sys/proc.h> 39 #include <sys/agpio.h> 40 #include <sys/device.h> 41 42 #include <uvm/uvm_extern.h> 43 44 #include <dev/pci/pcivar.h> 45 #include <dev/pci/pcireg.h> 46 #include <dev/pci/pcidevs.h> 47 #include <dev/pci/agpvar.h> 48 #include <dev/pci/agpreg.h> 49 50 #include <sys/bus.h> 51 52 struct agp_intel_softc { 53 u_int32_t initial_aperture; 54 /* aperture size at startup */ 55 struct agp_gatt *gatt; 56 struct pci_attach_args vga_pa; 57 u_int aperture_mask; 58 int chiptype; /* Chip type */ 59 #define CHIP_INTEL 0x0 60 #define CHIP_I443 0x1 61 #define CHIP_I840 0x2 62 #define CHIP_I845 0x3 63 #define CHIP_I850 0x4 64 #define CHIP_I865 0x5 65 66 }; 67 68 static u_int32_t agp_intel_get_aperture(struct agp_softc *); 69 static int agp_intel_set_aperture(struct agp_softc *, u_int32_t); 70 static int agp_intel_bind_page(struct agp_softc *, off_t, bus_addr_t); 71 static int agp_intel_unbind_page(struct agp_softc *, off_t); 72 static void agp_intel_flush_tlb(struct agp_softc *); 73 static int agp_intel_init(struct agp_softc *); 74 static bool agp_intel_resume(device_t); 75 76 static struct agp_methods agp_intel_methods = { 77 agp_intel_get_aperture, 78 agp_intel_set_aperture, 79 agp_intel_bind_page, 80 agp_intel_unbind_page, 81 agp_intel_flush_tlb, 82 agp_generic_enable, 83 agp_generic_alloc_memory, 84 agp_generic_free_memory, 85 agp_generic_bind_memory, 86 agp_generic_unbind_memory, 87 }; 88 89 static int 90 agp_intel_vgamatch(struct pci_attach_args *pa) 91 { 92 switch (PCI_PRODUCT(pa->pa_id)) { 93 case PCI_PRODUCT_INTEL_82855PM_AGP: 94 case PCI_PRODUCT_INTEL_82443LX_AGP: 95 case PCI_PRODUCT_INTEL_82443BX_AGP: 96 case PCI_PRODUCT_INTEL_82443GX_AGP: 97 case PCI_PRODUCT_INTEL_82850_AGP: /* i850/i860 */ 98 case PCI_PRODUCT_INTEL_82845_AGP: 99 case PCI_PRODUCT_INTEL_82840_AGP: 100 case PCI_PRODUCT_INTEL_82865_AGP: 101 case PCI_PRODUCT_INTEL_82875P_AGP: 102 return (1); 103 } 104 105 return (0); 106 } 107 108 int 109 agp_intel_attach(struct device *parent, struct device *self, void *aux) 110 { 111 struct agp_softc *sc = (struct agp_softc *)self; 112 struct pci_attach_args *pa= aux; 113 struct agp_intel_softc *isc; 114 struct agp_gatt *gatt; 115 u_int32_t value; 116 117 isc = malloc(sizeof *isc, M_AGP, M_NOWAIT|M_ZERO); 118 if (isc == NULL) { 119 aprint_error(": can't allocate chipset-specific softc\n"); 120 return ENOMEM; 121 } 122 123 sc->as_methods = &agp_intel_methods; 124 sc->as_chipc = isc; 125 126 if (pci_find_device(&isc->vga_pa, agp_intel_vgamatch) == 0) { 127 aprint_normal(": using generic initialization for Intel AGP\n"); 128 aprint_normal("%s", sc->as_dev.dv_xname); 129 isc->chiptype = CHIP_INTEL; 130 } 131 132 pci_get_capability(pa->pa_pc, pa->pa_tag, PCI_CAP_AGP, &sc->as_capoff, 133 NULL); 134 135 if (agp_map_aperture(pa, sc, AGP_APBASE) != 0) { 136 aprint_error(": can't map aperture\n"); 137 free(isc, M_AGP); 138 sc->as_chipc = NULL; 139 return ENXIO; 140 } 141 142 switch (PCI_PRODUCT(isc->vga_pa.pa_id)) { 143 case PCI_PRODUCT_INTEL_82443LX_AGP: 144 case PCI_PRODUCT_INTEL_82443BX_AGP: 145 case PCI_PRODUCT_INTEL_82443GX_AGP: 146 isc->chiptype = CHIP_I443; 147 break; 148 case PCI_PRODUCT_INTEL_82840_AGP: 149 isc->chiptype = CHIP_I840; 150 break; 151 case PCI_PRODUCT_INTEL_82855PM_AGP: 152 case PCI_PRODUCT_INTEL_82845_AGP: 153 isc->chiptype = CHIP_I845; 154 break; 155 case PCI_PRODUCT_INTEL_82850_AGP: 156 isc->chiptype = CHIP_I850; 157 break; 158 case PCI_PRODUCT_INTEL_82865_AGP: 159 case PCI_PRODUCT_INTEL_82875P_AGP: 160 isc->chiptype = CHIP_I865; 161 break; 162 } 163 164 /* Determine maximum supported aperture size. */ 165 value = pci_conf_read(sc->as_pc, sc->as_tag, AGP_INTEL_APSIZE); 166 pci_conf_write(sc->as_pc, sc->as_tag, 167 AGP_INTEL_APSIZE, APSIZE_MASK); 168 isc->aperture_mask = pci_conf_read(sc->as_pc, sc->as_tag, 169 AGP_INTEL_APSIZE) & APSIZE_MASK; 170 pci_conf_write(sc->as_pc, sc->as_tag, AGP_INTEL_APSIZE, value); 171 isc->initial_aperture = AGP_GET_APERTURE(sc); 172 173 for (;;) { 174 gatt = agp_alloc_gatt(sc); 175 if (gatt) 176 break; 177 178 /* 179 * Probably contigmalloc failure. Try reducing the 180 * aperture so that the gatt size reduces. 181 */ 182 if (AGP_SET_APERTURE(sc, AGP_GET_APERTURE(sc) / 2)) { 183 agp_generic_detach(sc); 184 aprint_error(": failed to set aperture\n"); 185 return ENOMEM; 186 } 187 } 188 isc->gatt = gatt; 189 190 if (!pmf_device_register(self, NULL, agp_intel_resume)) 191 aprint_error_dev(self, "couldn't establish power handler\n"); 192 193 return agp_intel_init(sc); 194 } 195 196 static int 197 agp_intel_init(struct agp_softc *sc) 198 { 199 struct agp_intel_softc *isc = sc->as_chipc; 200 struct agp_gatt *gatt = isc->gatt; 201 pcireg_t reg; 202 203 /* Install the gatt. */ 204 pci_conf_write(sc->as_pc, sc->as_tag, AGP_INTEL_ATTBASE, 205 gatt->ag_physical); 206 207 /* Enable the GLTB and setup the control register. */ 208 switch (isc->chiptype) { 209 case CHIP_I443: 210 pci_conf_write(sc->as_pc, sc->as_tag, AGP_INTEL_AGPCTRL, 211 AGPCTRL_AGPRSE | AGPCTRL_GTLB); 212 213 default: 214 pci_conf_write(sc->as_pc, sc->as_tag, AGP_INTEL_AGPCTRL, 215 pci_conf_read(sc->as_pc, sc->as_tag, AGP_INTEL_AGPCTRL) 216 | AGPCTRL_GTLB); 217 } 218 219 /* Enable things, clear errors etc. */ 220 switch (isc->chiptype) { 221 case CHIP_I845: 222 case CHIP_I865: 223 { 224 reg = pci_conf_read(sc->as_pc, sc->as_tag, AGP_I840_MCHCFG); 225 reg |= MCHCFG_AAGN; 226 pci_conf_write(sc->as_pc, sc->as_tag, AGP_I840_MCHCFG, reg); 227 break; 228 } 229 case CHIP_I840: 230 case CHIP_I850: 231 { 232 reg = pci_conf_read(sc->as_pc, sc->as_tag, AGP_INTEL_AGPCMD); 233 reg |= AGPCMD_AGPEN; 234 pci_conf_write(sc->as_pc, sc->as_tag, AGP_INTEL_AGPCMD, 235 reg); 236 reg = pci_conf_read(sc->as_pc, sc->as_tag, AGP_I840_MCHCFG); 237 reg |= MCHCFG_AAGN; 238 pci_conf_write(sc->as_pc, sc->as_tag, AGP_I840_MCHCFG, 239 reg); 240 break; 241 } 242 default: 243 { 244 reg = pci_conf_read(sc->as_pc, sc->as_tag, AGP_INTEL_NBXCFG); 245 reg &= ~NBXCFG_APAE; 246 reg |= NBXCFG_AAGN; 247 pci_conf_write(sc->as_pc, sc->as_tag, AGP_INTEL_NBXCFG, reg); 248 } 249 } 250 251 /* Clear Error status */ 252 switch (isc->chiptype) { 253 case CHIP_I840: 254 pci_conf_write(sc->as_pc, sc->as_tag, 255 AGP_INTEL_I8XX_ERRSTS, 0xc000); 256 break; 257 258 case CHIP_I845: 259 case CHIP_I850: 260 case CHIP_I865: 261 pci_conf_write(sc->as_pc, sc->as_tag, 262 AGP_INTEL_I8XX_ERRSTS, 0x00ff); 263 break; 264 265 default: 266 { 267 reg = pci_conf_read(sc->as_pc, sc->as_tag, AGP_INTEL_ERRSTS - 1); 268 reg |= 0x7000; 269 pci_conf_write(sc->as_pc, sc->as_tag, AGP_INTEL_ERRSTS - 1, reg); 270 } 271 } 272 273 return (0); 274 } 275 276 #if 0 277 static int 278 agp_intel_detach(struct agp_softc *sc) 279 { 280 int error; 281 pcireg_t reg; 282 struct agp_intel_softc *isc = sc->as_chipc; 283 284 error = agp_generic_detach(sc); 285 if (error) 286 return error; 287 288 /* XXX i845/i855PM/i840/i850E */ 289 reg = pci_conf_read(sc->as_pc, sc->as_tag, AGP_INTEL_NBXCFG); 290 reg &= ~(1 << 9); 291 printf("%s: set NBXCFG to %x\n", __func__, reg); 292 pci_conf_write(sc->as_pc, sc->as_tag, AGP_INTEL_NBXCFG, reg); 293 pci_conf_write(sc->as_pc, sc->as_tag, AGP_INTEL_ATTBASE, 0); 294 AGP_SET_APERTURE(sc, isc->initial_aperture); 295 agp_free_gatt(sc, isc->gatt); 296 297 return 0; 298 } 299 #endif 300 301 static u_int32_t 302 agp_intel_get_aperture(struct agp_softc *sc) 303 { 304 struct agp_intel_softc *isc = sc->as_chipc; 305 u_int32_t apsize; 306 307 apsize = pci_conf_read(sc->as_pc, sc->as_tag, 308 AGP_INTEL_APSIZE) & isc->aperture_mask; 309 310 /* 311 * The size is determined by the number of low bits of 312 * register APBASE which are forced to zero. The low 22 bits 313 * are always forced to zero and each zero bit in the apsize 314 * field just read forces the corresponding bit in the 27:22 315 * to be zero. We calculate the aperture size accordingly. 316 */ 317 return (((apsize ^ isc->aperture_mask) << 22) | ((1 << 22) - 1)) + 1; 318 } 319 320 static int 321 agp_intel_set_aperture(struct agp_softc *sc, u_int32_t aperture) 322 { 323 struct agp_intel_softc *isc = sc->as_chipc; 324 u_int32_t apsize; 325 326 /* 327 * Reverse the magic from get_aperture. 328 */ 329 apsize = ((aperture - 1) >> 22) ^ isc->aperture_mask; 330 331 /* 332 * Double check for sanity. 333 */ 334 if ((((apsize ^ isc->aperture_mask) << 22) | 335 ((1 << 22) - 1)) + 1 != aperture) 336 return EINVAL; 337 338 pci_conf_write(sc->as_pc, sc->as_tag, 339 AGP_INTEL_APSIZE, apsize); 340 341 return 0; 342 } 343 344 static int 345 agp_intel_bind_page(struct agp_softc *sc, off_t offset, bus_addr_t physical) 346 { 347 struct agp_intel_softc *isc = sc->as_chipc; 348 349 if (offset < 0 || offset >= (isc->gatt->ag_entries << AGP_PAGE_SHIFT)) 350 return EINVAL; 351 352 isc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = physical | 0x17; 353 return 0; 354 } 355 356 static int 357 agp_intel_unbind_page(struct agp_softc *sc, off_t offset) 358 { 359 struct agp_intel_softc *isc = sc->as_chipc; 360 361 if (offset < 0 || offset >= (isc->gatt->ag_entries << AGP_PAGE_SHIFT)) 362 return EINVAL; 363 364 isc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = 0; 365 return 0; 366 } 367 368 static void 369 agp_intel_flush_tlb(struct agp_softc *sc) 370 { 371 struct agp_intel_softc *isc = sc->as_chipc; 372 pcireg_t reg; 373 374 switch (isc->chiptype) { 375 case CHIP_I865: 376 case CHIP_I850: 377 case CHIP_I845: 378 case CHIP_I840: 379 case CHIP_I443: 380 { 381 reg = pci_conf_read(sc->as_pc, sc->as_tag, AGP_INTEL_AGPCTRL); 382 reg &= ~AGPCTRL_GTLB; 383 pci_conf_write(sc->as_pc, sc->as_tag, AGP_INTEL_AGPCTRL, 384 reg); 385 pci_conf_write(sc->as_pc, sc->as_tag, AGP_INTEL_AGPCTRL, 386 reg | AGPCTRL_GTLB); 387 break; 388 } 389 default: /* XXX */ 390 { 391 pci_conf_write(sc->as_pc, sc->as_tag, AGP_INTEL_AGPCTRL, 392 0x2200); 393 pci_conf_write(sc->as_pc, sc->as_tag, AGP_INTEL_AGPCTRL, 394 0x2280); 395 } 396 } 397 } 398 399 static bool 400 agp_intel_resume(device_t dv) 401 { 402 struct agp_softc *sc = device_private(dv); 403 404 agp_intel_init(sc); 405 agp_flush_cache(); 406 407 return true; 408 } 409
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