1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 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 29 #include <sys/cdefs.h> 30 __FBSDID("$FreeBSD$"); 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 u_int32_t capid; 169 170 sc->regs = via_v2_regs; 171 172 /* Look at the capability register to see if we handle AGP3 */ 173 capid = pci_read_config(dev, agp_find_caps(dev) + AGP_CAPID, 4); 174 if (((capid >> 20) & 0x0f) >= 3) { 175 agpsel = pci_read_config(dev, AGP_VIA_AGPSEL, 1); 176 if ((agpsel & (1 << 1)) == 0) 177 sc->regs = via_v3_regs; 178 } 179 180 error = agp_generic_attach(dev); 181 if (error) 182 return error; 183 184 sc->initial_aperture = AGP_GET_APERTURE(dev); 185 186 for (;;) { 187 gatt = agp_alloc_gatt(dev); 188 if (gatt) 189 break; 190 191 /* 192 * Probably contigmalloc failure. Try reducing the 193 * aperture so that the gatt size reduces. 194 */ 195 if (AGP_SET_APERTURE(dev, AGP_GET_APERTURE(dev) / 2)) { 196 agp_generic_detach(dev); 197 return ENOMEM; 198 } 199 } 200 sc->gatt = gatt; 201 202 if (sc->regs == via_v2_regs) { 203 /* Install the gatt. */ 204 pci_write_config(dev, sc->regs[REG_ATTBASE], gatt->ag_physical | 3, 4); 205 206 /* Enable the aperture. */ 207 pci_write_config(dev, sc->regs[REG_GARTCTRL], 0x0f, 4); 208 } else { 209 u_int32_t gartctrl; 210 211 /* Install the gatt. */ 212 pci_write_config(dev, sc->regs[REG_ATTBASE], gatt->ag_physical, 4); 213 214 /* Enable the aperture. */ 215 gartctrl = pci_read_config(dev, sc->regs[REG_GARTCTRL], 4); 216 pci_write_config(dev, sc->regs[REG_GARTCTRL], gartctrl | (3 << 7), 4); 217 } 218 219 device_printf(dev, "aperture size is %dM\n", 220 sc->initial_aperture / 1024 / 1024); 221 222 return 0; 223 } 224 225 static int 226 agp_via_detach(device_t dev) 227 { 228 struct agp_via_softc *sc = device_get_softc(dev); 229 230 agp_free_cdev(dev); 231 232 pci_write_config(dev, sc->regs[REG_GARTCTRL], 0, 4); 233 pci_write_config(dev, sc->regs[REG_ATTBASE], 0, 4); 234 AGP_SET_APERTURE(dev, sc->initial_aperture); 235 agp_free_gatt(sc->gatt); 236 agp_free_res(dev); 237 238 return 0; 239 } 240 241 static u_int32_t 242 agp_via_get_aperture(device_t dev) 243 { 244 struct agp_via_softc *sc = device_get_softc(dev); 245 u_int32_t apsize; 246 247 if (sc->regs == via_v2_regs) { 248 apsize = pci_read_config(dev, sc->regs[REG_APSIZE], 1); 249 250 /* 251 * The size is determined by the number of low bits of 252 * register APBASE which are forced to zero. The low 20 bits 253 * are always forced to zero and each zero bit in the apsize 254 * field just read forces the corresponding bit in the 27:20 255 * to be zero. We calculate the aperture size accordingly. 256 */ 257 return (((apsize ^ 0xff) << 20) | ((1 << 20) - 1)) + 1; 258 } else { 259 apsize = pci_read_config(dev, sc->regs[REG_APSIZE], 2) & 0xfff; 260 switch (apsize) { 261 case 0x800: 262 return 0x80000000; 263 case 0xc00: 264 return 0x40000000; 265 case 0xe00: 266 return 0x20000000; 267 case 0xf00: 268 return 0x10000000; 269 case 0xf20: 270 return 0x08000000; 271 case 0xf30: 272 return 0x04000000; 273 case 0xf38: 274 return 0x02000000; 275 case 0xf3c: 276 return 0x01000000; 277 case 0xf3e: 278 return 0x00800000; 279 case 0xf3f: 280 return 0x00400000; 281 default: 282 device_printf(dev, "Invalid aperture setting 0x%x\n", 283 pci_read_config(dev, sc->regs[REG_APSIZE], 2)); 284 return 0; 285 } 286 } 287 } 288 289 static int 290 agp_via_set_aperture(device_t dev, u_int32_t aperture) 291 { 292 struct agp_via_softc *sc = device_get_softc(dev); 293 u_int32_t apsize, key, val; 294 295 if (sc->regs == via_v2_regs) { 296 /* 297 * Reverse the magic from get_aperture. 298 */ 299 apsize = ((aperture - 1) >> 20) ^ 0xff; 300 301 /* 302 * Double check for sanity. 303 */ 304 if ((((apsize ^ 0xff) << 20) | ((1 << 20) - 1)) + 1 != aperture) 305 return EINVAL; 306 307 pci_write_config(dev, sc->regs[REG_APSIZE], apsize, 1); 308 } else { 309 switch (aperture) { 310 case 0x80000000: 311 key = 0x800; 312 break; 313 case 0x40000000: 314 key = 0xc00; 315 break; 316 case 0x20000000: 317 key = 0xe00; 318 break; 319 case 0x10000000: 320 key = 0xf00; 321 break; 322 case 0x08000000: 323 key = 0xf20; 324 break; 325 case 0x04000000: 326 key = 0xf30; 327 break; 328 case 0x02000000: 329 key = 0xf38; 330 break; 331 case 0x01000000: 332 key = 0xf3c; 333 break; 334 case 0x00800000: 335 key = 0xf3e; 336 break; 337 case 0x00400000: 338 key = 0xf3f; 339 break; 340 default: 341 device_printf(dev, "Invalid aperture size (%dMb)\n", 342 aperture / 1024 / 1024); 343 return EINVAL; 344 } 345 val = pci_read_config(dev, sc->regs[REG_APSIZE], 2); 346 pci_write_config(dev, sc->regs[REG_APSIZE], 347 ((val & ~0xfff) | key), 2); 348 } 349 return 0; 350 } 351 352 static int 353 agp_via_bind_page(device_t dev, vm_offset_t offset, vm_offset_t physical) 354 { 355 struct agp_via_softc *sc = device_get_softc(dev); 356 357 if (offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT)) 358 return EINVAL; 359 360 sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = physical; 361 return 0; 362 } 363 364 static int 365 agp_via_unbind_page(device_t dev, vm_offset_t offset) 366 { 367 struct agp_via_softc *sc = device_get_softc(dev); 368 369 if (offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT)) 370 return EINVAL; 371 372 sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = 0; 373 return 0; 374 } 375 376 static void 377 agp_via_flush_tlb(device_t dev) 378 { 379 struct agp_via_softc *sc = device_get_softc(dev); 380 u_int32_t gartctrl; 381 382 if (sc->regs == via_v2_regs) { 383 pci_write_config(dev, sc->regs[REG_GARTCTRL], 0x8f, 4); 384 pci_write_config(dev, sc->regs[REG_GARTCTRL], 0x0f, 4); 385 } else { 386 gartctrl = pci_read_config(dev, sc->regs[REG_GARTCTRL], 4); 387 pci_write_config(dev, sc->regs[REG_GARTCTRL], gartctrl & 388 ~(1 << 7), 4); 389 pci_write_config(dev, sc->regs[REG_GARTCTRL], gartctrl, 4); 390 } 391 392 } 393 394 static device_method_t agp_via_methods[] = { 395 /* Device interface */ 396 DEVMETHOD(device_probe, agp_via_probe), 397 DEVMETHOD(device_attach, agp_via_attach), 398 DEVMETHOD(device_detach, agp_via_detach), 399 DEVMETHOD(device_shutdown, bus_generic_shutdown), 400 DEVMETHOD(device_suspend, bus_generic_suspend), 401 DEVMETHOD(device_resume, bus_generic_resume), 402 403 /* AGP interface */ 404 DEVMETHOD(agp_get_aperture, agp_via_get_aperture), 405 DEVMETHOD(agp_set_aperture, agp_via_set_aperture), 406 DEVMETHOD(agp_bind_page, agp_via_bind_page), 407 DEVMETHOD(agp_unbind_page, agp_via_unbind_page), 408 DEVMETHOD(agp_flush_tlb, agp_via_flush_tlb), 409 DEVMETHOD(agp_enable, agp_generic_enable), 410 DEVMETHOD(agp_alloc_memory, agp_generic_alloc_memory), 411 DEVMETHOD(agp_free_memory, agp_generic_free_memory), 412 DEVMETHOD(agp_bind_memory, agp_generic_bind_memory), 413 DEVMETHOD(agp_unbind_memory, agp_generic_unbind_memory), 414 { 0, 0 } 415 }; 416 417 static driver_t agp_via_driver = { 418 "agp", 419 agp_via_methods, 420 sizeof(struct agp_via_softc), 421 }; 422 423 DRIVER_MODULE(agp_via, hostb, agp_via_driver, 0, 0); 424 MODULE_DEPEND(agp_via, agp, 1, 1, 1); 425 MODULE_DEPEND(agp_via, pci, 1, 1, 1); 426