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: releng/11.0/sys/dev/agp/agp_via.c 244926 2013-01-01 18:16:49Z antoine $"); 29 30#include <sys/param.h> 31#include <sys/systm.h> 32#include <sys/malloc.h> 33#include <sys/kernel.h> 34#include <sys/module.h> 35#include <sys/bus.h> 36#include <sys/lock.h> 37#include <sys/mutex.h> 38#include <sys/proc.h> 39 40#include <dev/agp/agppriv.h> 41#include <dev/agp/agpreg.h> 42#include <dev/pci/pcivar.h> 43#include <dev/pci/pcireg.h> 44 45#include <vm/vm.h> 46#include <vm/vm_object.h> 47#include <vm/pmap.h> 48 49#define REG_GARTCTRL 0 50#define REG_APSIZE 1 51#define REG_ATTBASE 2 52 53struct agp_via_softc { 54 struct agp_softc agp; 55 u_int32_t initial_aperture; /* aperture size at startup */ 56 struct agp_gatt *gatt; 57 int *regs; 58}; 59 60static int via_v2_regs[] = { AGP_VIA_GARTCTRL, AGP_VIA_APSIZE, 61 AGP_VIA_ATTBASE }; 62static int via_v3_regs[] = { AGP3_VIA_GARTCTRL, AGP3_VIA_APSIZE, 63 AGP3_VIA_ATTBASE }; 64 65static const char* 66agp_via_match(device_t dev) 67{ 68 if (pci_get_class(dev) != PCIC_BRIDGE 69 || pci_get_subclass(dev) != PCIS_BRIDGE_HOST) 70 return NULL; 71 72 if (agp_find_caps(dev) == 0) 73 return NULL; 74 75 switch (pci_get_devid(dev)) { 76 case 0x01981106: 77 return ("VIA 8763 (P4X600) host to PCI bridge"); 78 case 0x02591106: 79 return ("VIA PM800/PN800/PM880/PN880 host to PCI bridge"); 80 case 0x02691106: 81 return ("VIA KT880 host to PCI bridge"); 82 case 0x02961106: 83 return ("VIA 3296 (P4M800) host to PCI bridge"); 84 case 0x03051106: 85 return ("VIA 82C8363 (Apollo KT133x/KM133) host to PCI bridge"); 86 case 0x03141106: 87 return ("VIA 3314 (P4M800CE) host to PCI bridge"); 88 case 0x03241106: 89 return ("VIA VT3324 (CX700) host to PCI bridge"); 90 case 0x03271106: 91 return ("VIA 3327 (P4M890) host to PCI bridge"); 92 case 0x03641106: 93 return ("VIA 3364 (P4M900) host to PCI bridge"); 94 case 0x03911106: 95 return ("VIA 8371 (Apollo KX133) host to PCI bridge"); 96 case 0x05011106: 97 return ("VIA 8501 (Apollo MVP4) host to PCI bridge"); 98 case 0x05971106: 99 return ("VIA 82C597 (Apollo VP3) host to PCI bridge"); 100 case 0x05981106: 101 return ("VIA 82C598 (Apollo MVP3) host to PCI bridge"); 102 case 0x06011106: 103 return ("VIA 8601 (Apollo ProMedia/PLE133Ta) host to PCI bridge"); 104 case 0x06051106: 105 return ("VIA 82C694X (Apollo Pro 133A) host to PCI bridge"); 106 case 0x06911106: 107 return ("VIA 82C691 (Apollo Pro) host to PCI bridge"); 108 case 0x30911106: 109 return ("VIA 8633 (Pro 266) host to PCI bridge"); 110 case 0x30991106: 111 return ("VIA 8367 (KT266/KY266x/KT333) host to PCI bridge"); 112 case 0x31011106: 113 return ("VIA 8653 (Pro266T) host to PCI bridge"); 114 case 0x31121106: 115 return ("VIA 8361 (KLE133) host to PCI bridge"); 116 case 0x31161106: 117 return ("VIA XM266 (PM266/KM266) host to PCI bridge"); 118 case 0x31231106: 119 return ("VIA 862x (CLE266) host to PCI bridge"); 120 case 0x31281106: 121 return ("VIA 8753 (P4X266) host to PCI bridge"); 122 case 0x31481106: 123 return ("VIA 8703 (P4M266x/P4N266) host to PCI bridge"); 124 case 0x31561106: 125 return ("VIA XN266 (Apollo Pro266) host to PCI bridge"); 126 case 0x31681106: 127 return ("VIA 8754 (PT800) host to PCI bridge"); 128 case 0x31891106: 129 return ("VIA 8377 (Apollo KT400/KT400A/KT600) host to PCI bridge"); 130 case 0x32051106: 131 return ("VIA 8235/8237 (Apollo KM400/KM400A) host to PCI bridge"); 132 case 0x32081106: 133 return ("VIA 8783 (PT890) host to PCI bridge"); 134 case 0x32581106: 135 return ("VIA PT880 host to PCI bridge"); 136 case 0xb1981106: 137 return ("VIA VT83xx/VT87xx/KTxxx/Px8xx host to PCI bridge"); 138 } 139 140 return NULL; 141} 142 143static int 144agp_via_probe(device_t dev) 145{ 146 const char *desc; 147 148 if (resource_disabled("agp", device_get_unit(dev))) 149 return (ENXIO); 150 desc = agp_via_match(dev); 151 if (desc) { 152 device_set_desc(dev, desc); 153 return BUS_PROBE_DEFAULT; 154 } 155 156 return ENXIO; 157} 158 159static int 160agp_via_attach(device_t dev) 161{ 162 struct agp_via_softc *sc = device_get_softc(dev); 163 struct agp_gatt *gatt; 164 int error; 165 u_int32_t agpsel; 166 u_int32_t capid; 167 168 sc->regs = via_v2_regs; 169 170 /* Look at the capability register to see if we handle AGP3 */ 171 capid = pci_read_config(dev, agp_find_caps(dev) + AGP_CAPID, 4); 172 if (((capid >> 20) & 0x0f) >= 3) { 173 agpsel = pci_read_config(dev, AGP_VIA_AGPSEL, 1); 174 if ((agpsel & (1 << 1)) == 0) 175 sc->regs = via_v3_regs; 176 } 177 178 error = agp_generic_attach(dev); 179 if (error) 180 return error; 181 182 sc->initial_aperture = AGP_GET_APERTURE(dev); 183 184 for (;;) { 185 gatt = agp_alloc_gatt(dev); 186 if (gatt) 187 break; 188 189 /* 190 * Probably contigmalloc failure. Try reducing the 191 * aperture so that the gatt size reduces. 192 */ 193 if (AGP_SET_APERTURE(dev, AGP_GET_APERTURE(dev) / 2)) { 194 agp_generic_detach(dev); 195 return ENOMEM; 196 } 197 } 198 sc->gatt = gatt; 199 200 if (sc->regs == via_v2_regs) { 201 /* Install the gatt. */ 202 pci_write_config(dev, sc->regs[REG_ATTBASE], gatt->ag_physical | 3, 4); 203 204 /* Enable the aperture. */ 205 pci_write_config(dev, sc->regs[REG_GARTCTRL], 0x0f, 4); 206 } else { 207 u_int32_t gartctrl; 208 209 /* Install the gatt. */ 210 pci_write_config(dev, sc->regs[REG_ATTBASE], gatt->ag_physical, 4); 211 212 /* Enable the aperture. */ 213 gartctrl = pci_read_config(dev, sc->regs[REG_GARTCTRL], 4); 214 pci_write_config(dev, sc->regs[REG_GARTCTRL], gartctrl | (3 << 7), 4); 215 } 216 217 device_printf(dev, "aperture size is %dM\n", 218 sc->initial_aperture / 1024 / 1024); 219 220 return 0; 221} 222 223static int 224agp_via_detach(device_t dev) 225{ 226 struct agp_via_softc *sc = device_get_softc(dev); 227 228 agp_free_cdev(dev); 229 230 pci_write_config(dev, sc->regs[REG_GARTCTRL], 0, 4); 231 pci_write_config(dev, sc->regs[REG_ATTBASE], 0, 4); 232 AGP_SET_APERTURE(dev, sc->initial_aperture); 233 agp_free_gatt(sc->gatt); 234 agp_free_res(dev); 235 236 return 0; 237} 238 239static u_int32_t 240agp_via_get_aperture(device_t dev) 241{ 242 struct agp_via_softc *sc = device_get_softc(dev); 243 u_int32_t apsize; 244 245 if (sc->regs == via_v2_regs) { 246 apsize = pci_read_config(dev, sc->regs[REG_APSIZE], 1); 247 248 /* 249 * The size is determined by the number of low bits of 250 * register APBASE which are forced to zero. The low 20 bits 251 * are always forced to zero and each zero bit in the apsize 252 * field just read forces the corresponding bit in the 27:20 253 * to be zero. We calculate the aperture size accordingly. 254 */ 255 return (((apsize ^ 0xff) << 20) | ((1 << 20) - 1)) + 1; 256 } else { 257 apsize = pci_read_config(dev, sc->regs[REG_APSIZE], 2) & 0xfff; 258 switch (apsize) { 259 case 0x800: 260 return 0x80000000; 261 case 0xc00: 262 return 0x40000000; 263 case 0xe00: 264 return 0x20000000; 265 case 0xf00: 266 return 0x10000000; 267 case 0xf20: 268 return 0x08000000; 269 case 0xf30: 270 return 0x04000000; 271 case 0xf38: 272 return 0x02000000; 273 case 0xf3c: 274 return 0x01000000; 275 case 0xf3e: 276 return 0x00800000; 277 case 0xf3f: 278 return 0x00400000; 279 default: 280 device_printf(dev, "Invalid aperture setting 0x%x\n", 281 pci_read_config(dev, sc->regs[REG_APSIZE], 2)); 282 return 0; 283 } 284 } 285} 286 287static int 288agp_via_set_aperture(device_t dev, u_int32_t aperture) 289{ 290 struct agp_via_softc *sc = device_get_softc(dev); 291 u_int32_t apsize, key, val; 292 293 if (sc->regs == via_v2_regs) { 294 /* 295 * Reverse the magic from get_aperture. 296 */ 297 apsize = ((aperture - 1) >> 20) ^ 0xff; 298 299 /* 300 * Double check for sanity. 301 */ 302 if ((((apsize ^ 0xff) << 20) | ((1 << 20) - 1)) + 1 != aperture) 303 return EINVAL; 304 305 pci_write_config(dev, sc->regs[REG_APSIZE], apsize, 1); 306 } else { 307 switch (aperture) { 308 case 0x80000000: 309 key = 0x800; 310 break; 311 case 0x40000000: 312 key = 0xc00; 313 break; 314 case 0x20000000: 315 key = 0xe00; 316 break; 317 case 0x10000000: 318 key = 0xf00; 319 break; 320 case 0x08000000: 321 key = 0xf20; 322 break; 323 case 0x04000000: 324 key = 0xf30; 325 break; 326 case 0x02000000: 327 key = 0xf38; 328 break; 329 case 0x01000000: 330 key = 0xf3c; 331 break; 332 case 0x00800000: 333 key = 0xf3e; 334 break; 335 case 0x00400000: 336 key = 0xf3f; 337 break; 338 default: 339 device_printf(dev, "Invalid aperture size (%dMb)\n", 340 aperture / 1024 / 1024); 341 return EINVAL; 342 } 343 val = pci_read_config(dev, sc->regs[REG_APSIZE], 2); 344 pci_write_config(dev, sc->regs[REG_APSIZE], 345 ((val & ~0xfff) | key), 2); 346 } 347 return 0; 348} 349 350static int 351agp_via_bind_page(device_t dev, vm_offset_t offset, vm_offset_t physical) 352{ 353 struct agp_via_softc *sc = device_get_softc(dev); 354 355 if (offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT)) 356 return EINVAL; 357 358 sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = physical; 359 return 0; 360} 361 362static int 363agp_via_unbind_page(device_t dev, vm_offset_t offset) 364{ 365 struct agp_via_softc *sc = device_get_softc(dev); 366 367 if (offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT)) 368 return EINVAL; 369 370 sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = 0; 371 return 0; 372} 373 374static void 375agp_via_flush_tlb(device_t dev) 376{ 377 struct agp_via_softc *sc = device_get_softc(dev); 378 u_int32_t gartctrl; 379 380 if (sc->regs == via_v2_regs) { 381 pci_write_config(dev, sc->regs[REG_GARTCTRL], 0x8f, 4); 382 pci_write_config(dev, sc->regs[REG_GARTCTRL], 0x0f, 4); 383 } else { 384 gartctrl = pci_read_config(dev, sc->regs[REG_GARTCTRL], 4); 385 pci_write_config(dev, sc->regs[REG_GARTCTRL], gartctrl & 386 ~(1 << 7), 4); 387 pci_write_config(dev, sc->regs[REG_GARTCTRL], gartctrl, 4); 388 } 389 390} 391 392static device_method_t agp_via_methods[] = { 393 /* Device interface */ 394 DEVMETHOD(device_probe, agp_via_probe), 395 DEVMETHOD(device_attach, agp_via_attach), 396 DEVMETHOD(device_detach, agp_via_detach), 397 DEVMETHOD(device_shutdown, bus_generic_shutdown), 398 DEVMETHOD(device_suspend, bus_generic_suspend), 399 DEVMETHOD(device_resume, bus_generic_resume), 400 401 /* AGP interface */ 402 DEVMETHOD(agp_get_aperture, agp_via_get_aperture), 403 DEVMETHOD(agp_set_aperture, agp_via_set_aperture), 404 DEVMETHOD(agp_bind_page, agp_via_bind_page), 405 DEVMETHOD(agp_unbind_page, agp_via_unbind_page), 406 DEVMETHOD(agp_flush_tlb, agp_via_flush_tlb), 407 DEVMETHOD(agp_enable, agp_generic_enable), 408 DEVMETHOD(agp_alloc_memory, agp_generic_alloc_memory), 409 DEVMETHOD(agp_free_memory, agp_generic_free_memory), 410 DEVMETHOD(agp_bind_memory, agp_generic_bind_memory), 411 DEVMETHOD(agp_unbind_memory, agp_generic_unbind_memory), 412 413 { 0, 0 } 414}; 415 416static driver_t agp_via_driver = { 417 "agp", 418 agp_via_methods, 419 sizeof(struct agp_via_softc), 420}; 421 422static devclass_t agp_devclass; 423 424DRIVER_MODULE(agp_via, hostb, agp_via_driver, agp_devclass, 0, 0); 425MODULE_DEPEND(agp_via, agp, 1, 1, 1); 426MODULE_DEPEND(agp_via, pci, 1, 1, 1); 427