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/agp/agppriv.h> 43 #include <dev/agp/agpreg.h> 44 #include <dev/pci/pcivar.h> 45 #include <dev/pci/pcireg.h> 46 47 #include <vm/vm.h> 48 #include <vm/vm_object.h> 49 #include <vm/pmap.h> 50 51 #define REG_GARTCTRL 0 52 #define REG_APSIZE 1 53 #define REG_ATTBASE 2 54 55 struct agp_via_softc { 56 struct agp_softc agp; 57 u_int32_t initial_aperture; /* aperture size at startup */ 58 struct agp_gatt *gatt; 59 int *regs; 60 }; 61 62 static int via_v2_regs[] = { AGP_VIA_GARTCTRL, AGP_VIA_APSIZE, 63 AGP_VIA_ATTBASE }; 64 static int via_v3_regs[] = { AGP3_VIA_GARTCTRL, AGP3_VIA_APSIZE, 65 AGP3_VIA_ATTBASE }; 66 67 static const char* 68 agp_via_match(device_t dev) 69 { 70 if (pci_get_class(dev) != PCIC_BRIDGE 71 || pci_get_subclass(dev) != PCIS_BRIDGE_HOST) 72 return NULL; 73 74 if (agp_find_caps(dev) == 0) 75 return NULL; 76 77 switch (pci_get_devid(dev)) { 78 case 0x01981106: 79 return ("VIA 8763 (P4X600) host to PCI bridge"); 80 case 0x02591106: 81 return ("VIA PM800/PN800/PM880/PN880 host to PCI bridge"); 82 case 0x02691106: 83 return ("VIA KT880 host to PCI bridge"); 84 case 0x02961106: 85 return ("VIA 3296 (P4M800) host to PCI bridge"); 86 case 0x03051106: 87 return ("VIA 82C8363 (Apollo KT133x/KM133) host to PCI bridge"); 88 case 0x03141106: 89 return ("VIA 3314 (P4M800CE) host to PCI bridge"); 90 case 0x03241106: 91 return ("VIA VT3324 (CX700) host to PCI bridge"); 92 case 0x03271106: 93 return ("VIA 3327 (P4M890) host to PCI bridge"); 94 case 0x03641106: 95 return ("VIA 3364 (P4M900) host to PCI bridge"); 96 case 0x03911106: 97 return ("VIA 8371 (Apollo KX133) host to PCI bridge"); 98 case 0x05011106: 99 return ("VIA 8501 (Apollo MVP4) host to PCI bridge"); 100 case 0x05971106: 101 return ("VIA 82C597 (Apollo VP3) host to PCI bridge"); 102 case 0x05981106: 103 return ("VIA 82C598 (Apollo MVP3) host to PCI bridge"); 104 case 0x06011106: 105 return ("VIA 8601 (Apollo ProMedia/PLE133Ta) host to PCI bridge"); 106 case 0x06051106: 107 return ("VIA 82C694X (Apollo Pro 133A) host to PCI bridge"); 108 case 0x06911106: 109 return ("VIA 82C691 (Apollo Pro) host to PCI bridge"); 110 case 0x30911106: 111 return ("VIA 8633 (Pro 266) host to PCI bridge"); 112 case 0x30991106: 113 return ("VIA 8367 (KT266/KY266x/KT333) host to PCI bridge"); 114 case 0x31011106: 115 return ("VIA 8653 (Pro266T) host to PCI bridge"); 116 case 0x31121106: 117 return ("VIA 8361 (KLE133) host to PCI bridge"); 118 case 0x31161106: 119 return ("VIA XM266 (PM266/KM266) host to PCI bridge"); 120 case 0x31231106: 121 return ("VIA 862x (CLE266) host to PCI bridge"); 122 case 0x31281106: 123 return ("VIA 8753 (P4X266) host to PCI bridge"); 124 case 0x31481106: 125 return ("VIA 8703 (P4M266x/P4N266) host to PCI bridge"); 126 case 0x31561106: 127 return ("VIA XN266 (Apollo Pro266) host to PCI bridge"); 128 case 0x31681106: 129 return ("VIA 8754 (PT800) host to PCI bridge"); 130 case 0x31891106: 131 return ("VIA 8377 (Apollo KT400/KT400A/KT600) host to PCI bridge"); 132 case 0x32051106: 133 return ("VIA 8235/8237 (Apollo KM400/KM400A) host to PCI bridge"); 134 case 0x32081106: 135 return ("VIA 8783 (PT890) host to PCI bridge"); 136 case 0x32581106: 137 return ("VIA PT880 host to PCI bridge"); 138 case 0xb1981106: 139 return ("VIA VT83xx/VT87xx/KTxxx/Px8xx host to PCI bridge"); 140 }; 141 142 return NULL; 143 } 144 145 static int 146 agp_via_probe(device_t dev) 147 { 148 const char *desc; 149 150 if (resource_disabled("agp", device_get_unit(dev))) 151 return (ENXIO); 152 desc = agp_via_match(dev); 153 if (desc) { 154 device_set_desc(dev, desc); 155 return BUS_PROBE_DEFAULT; 156 } 157 158 return ENXIO; 159 } 160 161 static int 162 agp_via_attach(device_t dev) 163 { 164 struct agp_via_softc *sc = device_get_softc(dev); 165 struct agp_gatt *gatt; 166 int error; 167 u_int32_t agpsel; 168 169 /* XXX: This should be keying off of whether the bridge is AGP3 capable, 170 * rather than a bunch of device ids for chipsets that happen to do 8x. 171 */ 172 switch (pci_get_devid(dev)) { 173 case 0x01981106: 174 case 0x02591106: 175 case 0x02691106: 176 case 0x02961106: 177 case 0x03141106: 178 case 0x03241106: 179 case 0x03271106: 180 case 0x03641106: 181 case 0x31231106: 182 case 0x31681106: 183 case 0x31891106: 184 case 0x32051106: 185 case 0x32581106: 186 case 0xb1981106: 187 /* The newer VIA chipsets will select the AGP version based on 188 * what AGP versions the card supports. We still have to 189 * program it using the v2 registers if it has chosen to use 190 * compatibility mode. 191 */ 192 agpsel = pci_read_config(dev, AGP_VIA_AGPSEL, 1); 193 if ((agpsel & (1 << 1)) == 0) 194 sc->regs = via_v3_regs; 195 else 196 sc->regs = via_v2_regs; 197 break; 198 default: 199 sc->regs = via_v2_regs; 200 break; 201 } 202 203 error = agp_generic_attach(dev); 204 if (error) 205 return error; 206 207 sc->initial_aperture = AGP_GET_APERTURE(dev); 208 209 for (;;) { 210 gatt = agp_alloc_gatt(dev); 211 if (gatt) 212 break; 213 214 /* 215 * Probably contigmalloc failure. Try reducing the 216 * aperture so that the gatt size reduces. 217 */ 218 if (AGP_SET_APERTURE(dev, AGP_GET_APERTURE(dev) / 2)) { 219 agp_generic_detach(dev); 220 return ENOMEM; 221 } 222 } 223 sc->gatt = gatt; 224 225 if (sc->regs == via_v2_regs) { 226 /* Install the gatt. */ 227 pci_write_config(dev, sc->regs[REG_ATTBASE], gatt->ag_physical | 3, 4); 228 229 /* Enable the aperture. */ 230 pci_write_config(dev, sc->regs[REG_GARTCTRL], 0x0f, 4); 231 } else { 232 u_int32_t gartctrl; 233 234 /* Install the gatt. */ 235 pci_write_config(dev, sc->regs[REG_ATTBASE], gatt->ag_physical, 4); 236 237 /* Enable the aperture. */ 238 gartctrl = pci_read_config(dev, sc->regs[REG_ATTBASE], 4); 239 pci_write_config(dev, sc->regs[REG_GARTCTRL], gartctrl | (3 << 7), 4); 240 } 241 242 device_printf(dev, "aperture size is %dM\n", 243 sc->initial_aperture / 1024 / 1024); 244 245 return 0; 246 } 247 248 static int 249 agp_via_detach(device_t dev) 250 { 251 struct agp_via_softc *sc = device_get_softc(dev); 252 253 agp_free_cdev(dev); 254 255 pci_write_config(dev, sc->regs[REG_GARTCTRL], 0, 4); 256 pci_write_config(dev, sc->regs[REG_ATTBASE], 0, 4); 257 AGP_SET_APERTURE(dev, sc->initial_aperture); 258 agp_free_gatt(sc->gatt); 259 agp_free_res(dev); 260 261 return 0; 262 } 263 264 static u_int32_t 265 agp_via_get_aperture(device_t dev) 266 { 267 struct agp_via_softc *sc = device_get_softc(dev); 268 u_int32_t apsize; 269 270 if (sc->regs == via_v2_regs) { 271 apsize = pci_read_config(dev, sc->regs[REG_APSIZE], 1) & 0x1f; 272 273 /* 274 * The size is determined by the number of low bits of 275 * register APBASE which are forced to zero. The low 20 bits 276 * are always forced to zero and each zero bit in the apsize 277 * field just read forces the corresponding bit in the 27:20 278 * to be zero. We calculate the aperture size accordingly. 279 */ 280 return (((apsize ^ 0xff) << 20) | ((1 << 20) - 1)) + 1; 281 } else { 282 apsize = pci_read_config(dev, sc->regs[REG_APSIZE], 2) & 0xfff; 283 switch (apsize) { 284 case 0x800: 285 return 0x80000000; 286 case 0xc00: 287 return 0x40000000; 288 case 0xe00: 289 return 0x20000000; 290 case 0xf00: 291 return 0x10000000; 292 case 0xf20: 293 return 0x08000000; 294 case 0xf30: 295 return 0x04000000; 296 case 0xf38: 297 return 0x02000000; 298 default: 299 device_printf(dev, "Invalid aperture setting 0x%x", 300 pci_read_config(dev, sc->regs[REG_APSIZE], 2)); 301 return 0; 302 } 303 } 304 } 305 306 static int 307 agp_via_set_aperture(device_t dev, u_int32_t aperture) 308 { 309 struct agp_via_softc *sc = device_get_softc(dev); 310 u_int32_t apsize, key, val; 311 312 if (sc->regs == via_v2_regs) { 313 /* 314 * Reverse the magic from get_aperture. 315 */ 316 apsize = ((aperture - 1) >> 20) ^ 0xff; 317 318 /* 319 * Double check for sanity. 320 */ 321 if ((((apsize ^ 0xff) << 20) | ((1 << 20) - 1)) + 1 != aperture) 322 return EINVAL; 323 324 pci_write_config(dev, sc->regs[REG_APSIZE], apsize, 1); 325 } else { 326 switch (aperture) { 327 case 0x80000000: 328 key = 0x800; 329 break; 330 case 0x40000000: 331 key = 0xc00; 332 break; 333 case 0x20000000: 334 key = 0xe00; 335 break; 336 case 0x10000000: 337 key = 0xf00; 338 break; 339 case 0x08000000: 340 key = 0xf20; 341 break; 342 case 0x04000000: 343 key = 0xf30; 344 break; 345 case 0x02000000: 346 key = 0xf38; 347 break; 348 default: 349 device_printf(dev, "Invalid aperture size (%dMb)\n", 350 aperture / 1024 / 1024); 351 return EINVAL; 352 } 353 val = pci_read_config(dev, sc->regs[REG_APSIZE], 2); 354 pci_write_config(dev, sc->regs[REG_APSIZE], 355 ((val & ~0xfff) | key), 2); 356 } 357 return 0; 358 } 359 360 static int 361 agp_via_bind_page(device_t dev, int offset, vm_offset_t physical) 362 { 363 struct agp_via_softc *sc = device_get_softc(dev); 364 365 if (offset < 0 || offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT)) 366 return EINVAL; 367 368 sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = physical; 369 return 0; 370 } 371 372 static int 373 agp_via_unbind_page(device_t dev, int offset) 374 { 375 struct agp_via_softc *sc = device_get_softc(dev); 376 377 if (offset < 0 || offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT)) 378 return EINVAL; 379 380 sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = 0; 381 return 0; 382 } 383 384 static void 385 agp_via_flush_tlb(device_t dev) 386 { 387 struct agp_via_softc *sc = device_get_softc(dev); 388 u_int32_t gartctrl; 389 390 if (sc->regs == via_v2_regs) { 391 pci_write_config(dev, sc->regs[REG_GARTCTRL], 0x8f, 4); 392 pci_write_config(dev, sc->regs[REG_GARTCTRL], 0x0f, 4); 393 } else { 394 gartctrl = pci_read_config(dev, sc->regs[REG_GARTCTRL], 4); 395 pci_write_config(dev, sc->regs[REG_GARTCTRL], gartctrl & 396 ~(1 << 7), 4); 397 pci_write_config(dev, sc->regs[REG_GARTCTRL], gartctrl, 4); 398 } 399 400 } 401 402 static device_method_t agp_via_methods[] = { 403 /* Device interface */ 404 DEVMETHOD(device_probe, agp_via_probe), 405 DEVMETHOD(device_attach, agp_via_attach), 406 DEVMETHOD(device_detach, agp_via_detach), 407 DEVMETHOD(device_shutdown, bus_generic_shutdown), 408 DEVMETHOD(device_suspend, bus_generic_suspend), 409 DEVMETHOD(device_resume, bus_generic_resume), 410 411 /* AGP interface */ 412 DEVMETHOD(agp_get_aperture, agp_via_get_aperture), 413 DEVMETHOD(agp_set_aperture, agp_via_set_aperture), 414 DEVMETHOD(agp_bind_page, agp_via_bind_page), 415 DEVMETHOD(agp_unbind_page, agp_via_unbind_page), 416 DEVMETHOD(agp_flush_tlb, agp_via_flush_tlb), 417 DEVMETHOD(agp_enable, agp_generic_enable), 418 DEVMETHOD(agp_alloc_memory, agp_generic_alloc_memory), 419 DEVMETHOD(agp_free_memory, agp_generic_free_memory), 420 DEVMETHOD(agp_bind_memory, agp_generic_bind_memory), 421 DEVMETHOD(agp_unbind_memory, agp_generic_unbind_memory), 422 423 { 0, 0 } 424 }; 425 426 static driver_t agp_via_driver = { 427 "agp", 428 agp_via_methods, 429 sizeof(struct agp_via_softc), 430 }; 431 432 static devclass_t agp_devclass; 433 434 DRIVER_MODULE(agp_via, hostb, agp_via_driver, agp_devclass, 0, 0); 435 MODULE_DEPEND(agp_via, agp, 1, 1, 1); 436 MODULE_DEPEND(agp_via, pci, 1, 1, 1); 437