sys/dev/agp/agp_via.c

   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);