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