Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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FreeBSD/Linux Kernel Cross Reference
sys/dev/agp/agp_via.c
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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 * $FreeBSD: src/sys/dev/agp/agp_via.c,v 1.30 2009/12/21 03:28:05 rnoland Exp $ 27 */ 28 29 #include <sys/param.h> 30 #include <sys/systm.h> 31 #include <sys/malloc.h> 32 #include <sys/kernel.h> 33 #include <sys/bus.h> 34 #include <sys/lock.h> 35 36 #include <bus/pci/pcivar.h> 37 #include <bus/pci/pcireg.h> 38 #include "agppriv.h" 39 #include "agpreg.h" 40 41 #include <vm/vm.h> 42 #include <vm/vm_object.h> 43 #include <vm/pmap.h> 44 45 #define REG_GARTCTRL 0 46 #define REG_APSIZE 1 47 #define REG_ATTBASE 2 48 49 struct agp_via_softc { 50 struct agp_softc agp; 51 u_int32_t initial_aperture; /* aperture size at startup */ 52 struct agp_gatt *gatt; 53 int *regs; 54 }; 55 56 static int via_v2_regs[] = { AGP_VIA_GARTCTRL, AGP_VIA_APSIZE, 57 AGP_VIA_ATTBASE }; 58 static int via_v3_regs[] = { AGP3_VIA_GARTCTRL, AGP3_VIA_APSIZE, 59 AGP3_VIA_ATTBASE }; 60 61 static const char* 62 agp_via_match(device_t dev) 63 { 64 if (pci_get_class(dev) != PCIC_BRIDGE 65 || pci_get_subclass(dev) != PCIS_BRIDGE_HOST) 66 return NULL; 67 68 if (agp_find_caps(dev) == 0) 69 return NULL; 70 71 switch (pci_get_devid(dev)) { 72 case 0x01981106: 73 return ("VIA 8763 (P4X600) host to PCI bridge"); 74 case 0x02591106: 75 return ("VIA PM800/PN800/PM880/PN880 host to PCI bridge"); 76 case 0x02691106: 77 return ("VIA KT880 host to PCI bridge"); 78 case 0x02961106: 79 return ("VIA 3296 (P4M800) host to PCI bridge"); 80 case 0x03051106: 81 return ("VIA 82C8363 (Apollo KT133x/KM133) host to PCI bridge"); 82 case 0x03141106: 83 return ("VIA 3314 (P4M800CE) host to PCI bridge"); 84 case 0x03241106: 85 return ("VIA VT3324 (CX700) host to PCI bridge"); 86 case 0x03271106: 87 return ("VIA 3327 (P4M890) host to PCI bridge"); 88 case 0x03641106: 89 return ("VIA 3364 (P4M900) host to PCI bridge"); 90 case 0x03911106: 91 return ("VIA 8371 (Apollo KX133) host to PCI bridge"); 92 case 0x05011106: 93 return ("VIA 8501 (Apollo MVP4) host to PCI bridge"); 94 case 0x05971106: 95 return ("VIA 82C597 (Apollo VP3) host to PCI bridge"); 96 case 0x05981106: 97 return ("VIA 82C598 (Apollo MVP3) host to PCI bridge"); 98 case 0x06011106: 99 return ("VIA 8601 (Apollo ProMedia/PLE133Ta) host to PCI bridge"); 100 case 0x06051106: 101 return ("VIA 82C694X (Apollo Pro 133A) host to PCI bridge"); 102 case 0x06911106: 103 return ("VIA 82C691 (Apollo Pro) host to PCI bridge"); 104 case 0x30911106: 105 return ("VIA 8633 (Pro 266) host to PCI bridge"); 106 case 0x30991106: 107 return ("VIA 8367 (KT266/KY266x/KT333) host to PCI bridge"); 108 case 0x31011106: 109 return ("VIA 8653 (Pro266T) host to PCI bridge"); 110 case 0x31121106: 111 return ("VIA 8361 (KLE133) host to PCI bridge"); 112 case 0x31161106: 113 return ("VIA XM266 (PM266/KM266) host to PCI bridge"); 114 case 0x31231106: 115 return ("VIA 862x (CLE266) host to PCI bridge"); 116 case 0x31281106: 117 return ("VIA 8753 (P4X266) host to PCI bridge"); 118 case 0x31481106: 119 return ("VIA 8703 (P4M266x/P4N266) host to PCI bridge"); 120 case 0x31561106: 121 return ("VIA XN266 (Apollo Pro266) host to PCI bridge"); 122 case 0x31681106: 123 return ("VIA 8754 (PT800) host to PCI bridge"); 124 case 0x31891106: 125 return ("VIA 8377 (Apollo KT400/KT400A/KT600) host to PCI bridge"); 126 case 0x32051106: 127 return ("VIA 8235/8237 (Apollo KM400/KM400A) host to PCI bridge"); 128 case 0x32081106: 129 return ("VIA 8783 (PT890) host to PCI bridge"); 130 case 0x32581106: 131 return ("VIA PT880 host to PCI bridge"); 132 case 0xb1981106: 133 return ("VIA VT83xx/VT87xx/KTxxx/Px8xx host to PCI bridge"); 134 }; 135 136 return NULL; 137 } 138 139 static int 140 agp_via_probe(device_t dev) 141 { 142 const char *desc; 143 144 if (resource_disabled("agp", device_get_unit(dev))) 145 return (ENXIO); 146 desc = agp_via_match(dev); 147 if (desc) { 148 device_verbose(dev); 149 device_set_desc(dev, desc); 150 return BUS_PROBE_DEFAULT; 151 } 152 153 return ENXIO; 154 } 155 156 static int 157 agp_via_attach(device_t dev) 158 { 159 struct agp_via_softc *sc = device_get_softc(dev); 160 struct agp_gatt *gatt; 161 int error; 162 u_int32_t agpsel; 163 u_int32_t capid; 164 165 sc->regs = via_v2_regs; 166 167 /* Look at the capability register to see if we handle AGP3 */ 168 capid = pci_read_config(dev, agp_find_caps(dev) + AGP_CAPID, 4); 169 if (((capid >> 20) & 0x0f) >= 3) { 170 agpsel = pci_read_config(dev, AGP_VIA_AGPSEL, 1); 171 if ((agpsel & (1 << 1)) == 0) 172 sc->regs = via_v3_regs; 173 } 174 175 error = agp_generic_attach(dev); 176 if (error) 177 return error; 178 179 sc->initial_aperture = AGP_GET_APERTURE(dev); 180 if (sc->initial_aperture == 0) { 181 device_printf(dev, "bad initial aperture size, disabling\n"); 182 return ENXIO; 183 } 184 185 for (;;) { 186 gatt = agp_alloc_gatt(dev); 187 if (gatt) 188 break; 189 190 /* 191 * Probably contigmalloc failure. Try reducing the 192 * aperture so that the gatt size reduces. 193 */ 194 if (AGP_SET_APERTURE(dev, AGP_GET_APERTURE(dev) / 2)) { 195 agp_generic_detach(dev); 196 return ENOMEM; 197 } 198 } 199 sc->gatt = gatt; 200 201 if (sc->regs == via_v2_regs) { 202 /* Install the gatt. */ 203 pci_write_config(dev, sc->regs[REG_ATTBASE], gatt->ag_physical | 3, 4); 204 205 /* Enable the aperture. */ 206 pci_write_config(dev, sc->regs[REG_GARTCTRL], 0x0f, 4); 207 } else { 208 u_int32_t gartctrl; 209 210 /* Install the gatt. */ 211 pci_write_config(dev, sc->regs[REG_ATTBASE], gatt->ag_physical, 4); 212 213 /* Enable the aperture. */ 214 gartctrl = pci_read_config(dev, sc->regs[REG_GARTCTRL], 4); 215 pci_write_config(dev, sc->regs[REG_GARTCTRL], gartctrl | (3 << 7), 4); 216 } 217 218 return 0; 219 } 220 221 static int 222 agp_via_detach(device_t dev) 223 { 224 struct agp_via_softc *sc = device_get_softc(dev); 225 226 agp_free_cdev(dev); 227 228 pci_write_config(dev, sc->regs[REG_GARTCTRL], 0, 4); 229 pci_write_config(dev, sc->regs[REG_ATTBASE], 0, 4); 230 AGP_SET_APERTURE(dev, sc->initial_aperture); 231 agp_free_gatt(sc->gatt); 232 agp_free_res(dev); 233 234 return 0; 235 } 236 237 static u_int32_t 238 agp_via_get_aperture(device_t dev) 239 { 240 struct agp_via_softc *sc = device_get_softc(dev); 241 u_int32_t apsize; 242 243 if (sc->regs == via_v2_regs) { 244 apsize = pci_read_config(dev, sc->regs[REG_APSIZE], 1); 245 246 /* 247 * The size is determined by the number of low bits of 248 * register APBASE which are forced to zero. The low 20 bits 249 * are always forced to zero and each zero bit in the apsize 250 * field just read forces the corresponding bit in the 27:20 251 * to be zero. We calculate the aperture size accordingly. 252 */ 253 return (((apsize ^ 0xff) << 20) | ((1 << 20) - 1)) + 1; 254 } else { 255 apsize = pci_read_config(dev, sc->regs[REG_APSIZE], 2) & 0xfff; 256 switch (apsize) { 257 case 0x800: 258 return 0x80000000; 259 case 0xc00: 260 return 0x40000000; 261 case 0xe00: 262 return 0x20000000; 263 case 0xf00: 264 return 0x10000000; 265 case 0xf20: 266 return 0x08000000; 267 case 0xf30: 268 return 0x04000000; 269 case 0xf38: 270 return 0x02000000; 271 case 0xf3c: 272 return 0x01000000; 273 case 0xf3e: 274 return 0x00800000; 275 case 0xf3f: 276 return 0x00400000; 277 default: 278 device_printf(dev, "Invalid aperture setting 0x%x\n", 279 pci_read_config(dev, sc->regs[REG_APSIZE], 2)); 280 return 0; 281 } 282 } 283 } 284 285 static int 286 agp_via_set_aperture(device_t dev, u_int32_t aperture) 287 { 288 struct agp_via_softc *sc = device_get_softc(dev); 289 u_int32_t apsize, key, val; 290 291 if (sc->regs == via_v2_regs) { 292 /* 293 * Reverse the magic from get_aperture. 294 */ 295 apsize = ((aperture - 1) >> 20) ^ 0xff; 296 297 /* 298 * Double check for sanity. 299 */ 300 if ((((apsize ^ 0xff) << 20) | ((1 << 20) - 1)) + 1 != aperture) 301 return EINVAL; 302 303 pci_write_config(dev, sc->regs[REG_APSIZE], apsize, 1); 304 } else { 305 switch (aperture) { 306 case 0x80000000: 307 key = 0x800; 308 break; 309 case 0x40000000: 310 key = 0xc00; 311 break; 312 case 0x20000000: 313 key = 0xe00; 314 break; 315 case 0x10000000: 316 key = 0xf00; 317 break; 318 case 0x08000000: 319 key = 0xf20; 320 break; 321 case 0x04000000: 322 key = 0xf30; 323 break; 324 case 0x02000000: 325 key = 0xf38; 326 break; 327 case 0x01000000: 328 key = 0xf3c; 329 break; 330 case 0x00800000: 331 key = 0xf3e; 332 break; 333 case 0x00400000: 334 key = 0xf3f; 335 break; 336 default: 337 device_printf(dev, "Invalid aperture size (%dMb)\n", 338 aperture / 1024 / 1024); 339 return EINVAL; 340 } 341 val = pci_read_config(dev, sc->regs[REG_APSIZE], 2); 342 pci_write_config(dev, sc->regs[REG_APSIZE], 343 ((val & ~0xfff) | key), 2); 344 } 345 return 0; 346 } 347 348 static int 349 agp_via_bind_page(device_t dev, vm_offset_t offset, vm_offset_t physical) 350 { 351 struct agp_via_softc *sc = device_get_softc(dev); 352 353 if (offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT)) 354 return EINVAL; 355 356 sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = physical; 357 return 0; 358 } 359 360 static int 361 agp_via_unbind_page(device_t dev, vm_offset_t offset) 362 { 363 struct agp_via_softc *sc = device_get_softc(dev); 364 365 if (offset >= (sc->gatt->ag_entries << AGP_PAGE_SHIFT)) 366 return EINVAL; 367 368 sc->gatt->ag_virtual[offset >> AGP_PAGE_SHIFT] = 0; 369 return 0; 370 } 371 372 static void 373 agp_via_flush_tlb(device_t dev) 374 { 375 struct agp_via_softc *sc = device_get_softc(dev); 376 u_int32_t gartctrl; 377 378 if (sc->regs == via_v2_regs) { 379 pci_write_config(dev, sc->regs[REG_GARTCTRL], 0x8f, 4); 380 pci_write_config(dev, sc->regs[REG_GARTCTRL], 0x0f, 4); 381 } else { 382 gartctrl = pci_read_config(dev, sc->regs[REG_GARTCTRL], 4); 383 pci_write_config(dev, sc->regs[REG_GARTCTRL], gartctrl & 384 ~(1 << 7), 4); 385 pci_write_config(dev, sc->regs[REG_GARTCTRL], gartctrl, 4); 386 } 387 388 } 389 390 static device_method_t agp_via_methods[] = { 391 /* Device interface */ 392 DEVMETHOD(device_probe, agp_via_probe), 393 DEVMETHOD(device_attach, agp_via_attach), 394 DEVMETHOD(device_detach, agp_via_detach), 395 DEVMETHOD(device_shutdown, bus_generic_shutdown), 396 DEVMETHOD(device_suspend, bus_generic_suspend), 397 DEVMETHOD(device_resume, bus_generic_resume), 398 399 /* AGP interface */ 400 DEVMETHOD(agp_get_aperture, agp_via_get_aperture), 401 DEVMETHOD(agp_set_aperture, agp_via_set_aperture), 402 DEVMETHOD(agp_bind_page, agp_via_bind_page), 403 DEVMETHOD(agp_unbind_page, agp_via_unbind_page), 404 DEVMETHOD(agp_flush_tlb, agp_via_flush_tlb), 405 DEVMETHOD(agp_enable, agp_generic_enable), 406 DEVMETHOD(agp_alloc_memory, agp_generic_alloc_memory), 407 DEVMETHOD(agp_free_memory, agp_generic_free_memory), 408 DEVMETHOD(agp_bind_memory, agp_generic_bind_memory), 409 DEVMETHOD(agp_unbind_memory, agp_generic_unbind_memory), 410 411 DEVMETHOD_END 412 }; 413 414 static driver_t agp_via_driver = { 415 "agp", 416 agp_via_methods, 417 sizeof(struct agp_via_softc), 418 }; 419 420 static devclass_t agp_devclass; 421 422 DRIVER_MODULE(agp_via, pci, agp_via_driver, agp_devclass, NULL, NULL); 423 MODULE_DEPEND(agp_via, agp, 1, 1, 1); 424 MODULE_DEPEND(agp_via, pci, 1, 1, 1);
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