1 /*- 2 * Copyright (c) 2000 Doug Rabson 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27 #include <sys/cdefs.h> 28 __FBSDID("$FreeBSD$"); 29 30 #include "opt_bus.h" 31 32 #include <sys/param.h> 33 #include <sys/systm.h> 34 #include <sys/malloc.h> 35 #include <sys/kernel.h> 36 #include <sys/module.h> 37 #include <sys/bus.h> 38 #include <sys/lock.h> 39 #include <sys/mutex.h> 40 #include <sys/proc.h> 41 42 #include <dev/pci/pcivar.h> 43 #include <dev/pci/pcireg.h> 44 #include <pci/agppriv.h> 45 #include <pci/agpreg.h> 46 47 #include <vm/vm.h> 48 #include <vm/vm_object.h> 49 #include <vm/pmap.h> 50 51 #define MAX_APSIZE 0x3f /* 256 MB */ 52 53 struct agp_intel_softc { 54 struct agp_softc agp; 55 u_int32_t initial_aperture; /* aperture size at startup */ 56 struct agp_gatt *gatt; 57 u_int aperture_mask; 58 }; 59 60 static const char* 61 agp_intel_match(device_t dev) 62 { 63 if (pci_get_class(dev) != PCIC_BRIDGE 64 || pci_get_subclass(dev) != PCIS_BRIDGE_HOST) 65 return NULL; 66 67 if (agp_find_caps(dev) == 0) 68 return NULL; 69 70 switch (pci_get_devid(dev)) { 71 /* Intel -- vendor 0x8086 */ 72 case 0x71808086: 73 return ("Intel 82443LX (440 LX) host to PCI bridge"); 74 75 case 0x71908086: 76 return ("Intel 82443BX (440 BX) host to PCI bridge"); 77 78 case 0x71a08086: 79 return ("Intel 82443GX host to PCI bridge"); 80 81 case 0x71a18086: 82 return ("Intel 82443GX host to AGP bridge"); 83 84 case 0x11308086: 85 return ("Intel 82815 (i815 GMCH) host to PCI bridge"); 86 87 case 0x25008086: 88 case 0x25018086: 89 return ("Intel 82820 host to AGP bridge"); 90 91 case 0x35758086: 92 return ("Intel 82830 host to AGP bridge"); 93 94 case 0x1a218086: 95 return ("Intel 82840 host to AGP bridge"); 96 97 case 0x1a308086: 98 return ("Intel 82845 host to AGP bridge"); 99 100 case 0x25308086: 101 return ("Intel 82850 host to AGP bridge"); 102 103 case 0x33408086: 104 return ("Intel 82855 host to AGP bridge"); 105 106 case 0x25318086: 107 return ("Intel 82860 host to AGP bridge"); 108 109 case 0x25708086: 110 return ("Intel 82865 host to AGP bridge"); 111 112 case 0x255d8086: 113 return ("Intel E7205 host to AGP bridge"); 114 115 case 0x25788086: 116 return ("Intel 82875P host to AGP bridge"); 117 118 case 0x25608086: 119 return ("Intel 82845G host to AGP bridge"); 120 121 case 0x35808086: 122 return ("Intel 82855GM host to AGP bridge"); 123 }; 124 125 return NULL; 126 } 127 128 static int 129 agp_intel_probe(device_t dev) 130 { 131 const char *desc; 132 133 if (resource_disabled("agp", device_get_unit(dev))) 134 return (ENXIO); 135 desc = agp_intel_match(dev); 136 if (desc) { 137 device_set_desc(dev, desc); 138 return BUS_PROBE_DEFAULT; 139 } 140 141 return ENXIO; 142 } 143 144 static int 145 agp_intel_attach(device_t dev) 146 { 147 struct agp_intel_softc *sc = device_get_softc(dev); 148 struct agp_gatt *gatt; 149 u_int32_t type = pci_get_devid(dev); 150 u_int32_t value; 151 int error; 152 153 error = agp_generic_attach(dev); 154 if (error) 155 return error; 156 157 /* Determine maximum supported aperture size. */ 158 value = pci_read_config(dev, AGP_INTEL_APSIZE, 1); 159 pci_write_config(dev, AGP_INTEL_APSIZE, MAX_APSIZE, 1); 160 sc->aperture_mask = pci_read_config(dev, AGP_INTEL_APSIZE, 1) & 161 MAX_APSIZE; 162 pci_write_config(dev, AGP_INTEL_APSIZE, value, 1); 163 sc->initial_aperture = AGP_GET_APERTURE(dev); 164 165 for (;;) { 166 gatt = agp_alloc_gatt(dev); 167 if (gatt) 168 break; 169 170 /* 171 * Probably contigmalloc failure. Try reducing the 172 * aperture so that the gatt size reduces. 173 */ 174 if (AGP_SET_APERTURE(dev, AGP_GET_APERTURE(dev) / 2)) { 175 agp_generic_detach(dev); 176 return ENOMEM; 177 } 178 } 179 sc->gatt = gatt; 180 181 /* Install the gatt. */ 182 pci_write_config(dev, AGP_INTEL_ATTBASE, gatt->ag_physical, 4); 183 184 /* Enable the GLTB and setup the control register. */ 185 switch (type) { 186 case 0x71908086: /* 440LX/EX */ 187 pci_write_config(dev, AGP_INTEL_AGPCTRL, 0x2080, 4); 188 break; 189 case 0x71808086: /* 440BX */ 190 /* 191 * XXX: Should be 0xa080? Bit 9 is undefined, and 192 * bit 13 being on and bit 15 being clear is illegal. 193 */ 194 pci_write_config(dev, AGP_INTEL_AGPCTRL, 0x2280, 4); 195 break; 196 default: 197 value = pci_read_config(dev, AGP_INTEL_AGPCTRL, 4); 198 pci_write_config(dev, AGP_INTEL_AGPCTRL, value | 0x80, 4); 199 } 200 201 /* Enable things, clear errors etc. */ 202 switch (type) { 203 case 0x1a218086: /* i840 */ 204 case 0x25308086: /* i850 */ 205 case 0x25318086: /* i860 */ 206 pci_write_config(dev, AGP_INTEL_MCHCFG, 207 (pci_read_config(dev, AGP_INTEL_MCHCFG, 2) 208 | (1 << 9)), 2); 209 break; 210 211 case 0x25008086: /* i820 */ 212 case 0x25018086: /* i820 */ 213 pci_write_config(dev, AGP_INTEL_I820_RDCR, 214 (pci_read_config(dev, AGP_INTEL_I820_RDCR, 1) 215 | (1 << 1)), 1); 216 break; 217 218 case 0x1a308086: /* i845 */ 219 case 0x33408086: /* i855 */ 220 case 0x35808086: /* i855GM */ 221 case 0x255d8086: /* E7205 */ 222 case 0x25708086: /* i865 */ 223 case 0x25788086: /* i875P */ 224 case 0x25608086: /* i845G */ 225 pci_write_config(dev, AGP_INTEL_I845_MCHCFG, 226 (pci_read_config(dev, AGP_INTEL_I845_MCHCFG, 1) 227 | (1 << 1)), 1); 228 break; 229 230 default: /* Intel Generic (maybe) */ 231 pci_write_config(dev, AGP_INTEL_NBXCFG, 232 (pci_read_config(dev, AGP_INTEL_NBXCFG, 4) 233 & ~(1 << 10)) | (1 << 9), 4); 234 } 235 236 switch (type) { 237 case 0x1a218086: /* i840 */ 238 pci_write_config(dev, AGP_INTEL_I8XX_ERRSTS, 0xc000, 2); 239 break; 240 241 case 0x25008086: /* i820 */ 242 case 0x25018086: /* i820 */ 243 case 0x1a308086: /* i845 */ 244 case 0x25308086: /* i850 */ 245 case 0x33408086: /* i855 */ 246 case 0x255d8086: /* E7205 */ 247 case 0x25318086: /* i860 */ 248 case 0x25708086: /* i865 */ 249 case 0x25788086: /* i875P */ 250 case 0x25608086: /* i845G */ 251 pci_write_config(dev, AGP_INTEL_I8XX_ERRSTS, 0x00ff, 2); 252 break; 253 254 default: /* Intel Generic (maybe) */ 255 pci_write_config(dev, AGP_INTEL_ERRSTS + 1, 7, 1); 256 } 257 258 return 0; 259 } 260 261 static int 262 agp_intel_detach(device_t dev) 263 { 264 struct agp_intel_softc *sc = device_get_softc(dev); 265 u_int32_t type = pci_get_devid(dev); 266 int error; 267 268 error = agp_generic_detach(dev); 269 if (error) 270 return error; 271 272 switch (type) { 273 case 0x1a218086: /* i840 */ 274 case 0x25308086: /* i850 */ 275 case 0x25318086: /* i860 */ 276 printf("%s: set MCHCFG to %x\n", __func__, (unsigned) 277 (pci_read_config(dev, AGP_INTEL_MCHCFG, 2) 278 & ~(1 << 9))); 279 pci_write_config(dev, AGP_INTEL_MCHCFG, 280 (pci_read_config(dev, AGP_INTEL_MCHCFG, 2) 281 & ~(1 << 9)), 2); 282 283 case 0x25008086: /* i820 */ 284 case 0x25018086: /* i820 */ 285 printf("%s: set RDCR to %x\n", __func__, (unsigned) 286 (pci_read_config(dev, AGP_INTEL_I820_RDCR, 1) 287 & ~(1 << 1))); 288 pci_write_config(dev, AGP_INTEL_I820_RDCR, 289 (pci_read_config(dev, AGP_INTEL_I820_RDCR, 1) 290 & ~(1 << 1)), 1); 291 292 case 0x1a308086: /* i845 */ 293 case 0x25608086: /* i845G */ 294 case 0x33408086: /* i855 */ 295 case 0x35808086: /* i855GM */ 296 case 0x255d8086: /* E7205 */ 297 case 0x25708086: /* i865 */ 298 case 0x25788086: /* i875P */ 299 printf("%s: set MCHCFG to %x\n", __func__, (unsigned) 300 (pci_read_config(dev, AGP_INTEL_I845_MCHCFG, 1) 301 & ~(1 << 1))); 302 pci_write_config(dev, AGP_INTEL_MCHCFG, 303 (pci_read_config(dev, AGP_INTEL_I845_MCHCFG, 1) 304 & ~(1 << 1)), 1); 305 306 default: /* Intel Generic (maybe) */ 307 printf("%s: set NBXCFG to %x\n", __func__, 308 (pci_read_config(dev, AGP_INTEL_NBXCFG, 4) 309 & ~(1 << 9))); 310 pci_write_config(dev, AGP_INTEL_NBXCFG, 311 (pci_read_config(dev, AGP_INTEL_NBXCFG, 4) 312 & ~(1 << 9)), 4); 313 } 314 pci_write_config(dev, AGP_INTEL_ATTBASE, 0, 4); 315 AGP_SET_APERTURE(dev, sc->initial_aperture); 316 agp_free_gatt(sc->gatt); 317 318 return 0; 319 } 320 321 static u_int32_t 322 agp_intel_get_aperture(device_t dev) 323 { 324 struct agp_intel_softc *sc = device_get_softc(dev); 325 u_int32_t apsize; 326 327 apsize = pci_read_config(dev, AGP_INTEL_APSIZE, 1) & sc->aperture_mask; 328 329 /* 330 * The size is determined by the number of low bits of 331 * register APBASE which are forced to zero. The low 22 bits 332 * are always forced to zero and each zero bit in the apsize 333 * field just read forces the corresponding bit in the 27:22 334 * to be zero. We calculate the aperture size accordingly. 335 */ 336 return (((apsize ^ sc->aperture_mask) << 22) | ((1 << 22) - 1)) + 1; 337 } 338 339 static int 340 agp_intel_set_aperture(device_t dev, u_int32_t aperture) 341 { 342 struct agp_intel_softc *sc = device_get_softc(dev); 343 u_int32_t apsize; 344 345 /* 346 * Reverse the magic from get_aperture. 347 */ 348 apsize = ((aperture - 1) >> 22) ^ sc->aperture_mask; 349 350 /* 351 * Double check for sanity. 352 */ 353 if ((((apsize ^ sc->aperture_mask) << 22) | ((1 << 22) - 1)) + 1 != aperture) 354 return EINVAL; 355 356 pci_write_config(dev, AGP_INTEL_APSIZE, apsize, 1); 357 358 return 0; 359 } 360 361 static int 362 agp_intel_bind_page(device_t dev, int offset, vm_offset_t physical) 363 { 364 struct agp_intel_softc *sc = device_get_softc(dev); 365 366 if (offset < 0 || offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT)) 367 return EINVAL; 368 369 sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = physical | 0x17; 370 return 0; 371 } 372 373 static int 374 agp_intel_unbind_page(device_t dev, int offset) 375 { 376 struct agp_intel_softc *sc = device_get_softc(dev); 377 378 if (offset < 0 || offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT)) 379 return EINVAL; 380 381 sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = 0; 382 return 0; 383 } 384 385 static void 386 agp_intel_flush_tlb(device_t dev) 387 { 388 u_int32_t val; 389 390 val = pci_read_config(dev, AGP_INTEL_AGPCTRL, 4); 391 pci_write_config(dev, AGP_INTEL_AGPCTRL, val & ~(1 << 7), 4); 392 pci_write_config(dev, AGP_INTEL_AGPCTRL, val, 4); 393 } 394 395 static device_method_t agp_intel_methods[] = { 396 /* Device interface */ 397 DEVMETHOD(device_probe, agp_intel_probe), 398 DEVMETHOD(device_attach, agp_intel_attach), 399 DEVMETHOD(device_detach, agp_intel_detach), 400 DEVMETHOD(device_shutdown, bus_generic_shutdown), 401 DEVMETHOD(device_suspend, bus_generic_suspend), 402 DEVMETHOD(device_resume, bus_generic_resume), 403 404 /* AGP interface */ 405 DEVMETHOD(agp_get_aperture, agp_intel_get_aperture), 406 DEVMETHOD(agp_set_aperture, agp_intel_set_aperture), 407 DEVMETHOD(agp_bind_page, agp_intel_bind_page), 408 DEVMETHOD(agp_unbind_page, agp_intel_unbind_page), 409 DEVMETHOD(agp_flush_tlb, agp_intel_flush_tlb), 410 DEVMETHOD(agp_enable, agp_generic_enable), 411 DEVMETHOD(agp_alloc_memory, agp_generic_alloc_memory), 412 DEVMETHOD(agp_free_memory, agp_generic_free_memory), 413 DEVMETHOD(agp_bind_memory, agp_generic_bind_memory), 414 DEVMETHOD(agp_unbind_memory, agp_generic_unbind_memory), 415 416 { 0, 0 } 417 }; 418 419 static driver_t agp_intel_driver = { 420 "agp", 421 agp_intel_methods, 422 sizeof(struct agp_intel_softc), 423 }; 424 425 static devclass_t agp_devclass; 426 427 DRIVER_MODULE(agp_intel, hostb, agp_intel_driver, agp_devclass, 0, 0); 428 MODULE_DEPEND(agp_intel, agp, 1, 1, 1); 429 MODULE_DEPEND(agp_intel, pci, 1, 1, 1); 430