drivers/char/agp/via-agp.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * VIA AGPGART routines.
   4  */
   5
   6 #include <linux/types.h>
   7 #include <linux/module.h>
   8 #include <linux/pci.h>
   9 #include <linux/init.h>
  10 #include <linux/agp_backend.h>
  11 #include "agp.h"
  12
  13 static const struct pci_device_id agp_via_pci_table[];
  14
  15 #define VIA_GARTCTRL    0x80
  16 #define VIA_APSIZE      0x84
  17 #define VIA_ATTBASE     0x88
  18
  19 #define VIA_AGP3_GARTCTRL       0x90
  20 #define VIA_AGP3_APSIZE         0x94
  21 #define VIA_AGP3_ATTBASE        0x98
  22 #define VIA_AGPSEL              0xfd
  23
  24 static int via_fetch_size(void)
  25 {
  26         int i;
  27         u8 temp;
  28         struct aper_size_info_8 *values;
  29
  30         values = A_SIZE_8(agp_bridge->driver->aperture_sizes);
  31         pci_read_config_byte(agp_bridge->dev, VIA_APSIZE, &temp);
  32         for (i = 0; i < agp_bridge->driver->num_aperture_sizes; i++) {
  33                 if (temp == values[i].size_value) {
  34                         agp_bridge->previous_size =
  35                             agp_bridge->current_size = (void *) (values + i);
  36                         agp_bridge->aperture_size_idx = i;
  37                         return values[i].size;
  38                 }
  39         }
  40         printk(KERN_ERR PFX "Unknown aperture size from AGP bridge (0x%x)\n", temp);
  41         return 0;
  42 }
  43
  44
  45 static int via_configure(void)
  46 {
  47         struct aper_size_info_8 *current_size;
  48
  49         current_size = A_SIZE_8(agp_bridge->current_size);
  50         /* aperture size */
  51         pci_write_config_byte(agp_bridge->dev, VIA_APSIZE,
  52                               current_size->size_value);
  53         /* address to map to */
  54         agp_bridge->gart_bus_addr = pci_bus_address(agp_bridge->dev,
  55                                                     AGP_APERTURE_BAR);
  56
  57         /* GART control register */
  58         pci_write_config_dword(agp_bridge->dev, VIA_GARTCTRL, 0x0000000f);
  59
  60         /* attbase - aperture GATT base */
  61         pci_write_config_dword(agp_bridge->dev, VIA_ATTBASE,
  62                             (agp_bridge->gatt_bus_addr & 0xfffff000) | 3);
  63         return 0;
  64 }
  65
  66
  67 static void via_cleanup(void)
  68 {
  69         struct aper_size_info_8 *previous_size;
  70
  71         previous_size = A_SIZE_8(agp_bridge->previous_size);
  72         pci_write_config_byte(agp_bridge->dev, VIA_APSIZE,
  73                               previous_size->size_value);
  74         /* Do not disable by writing 0 to VIA_ATTBASE, it screws things up
  75          * during reinitialization.
  76          */
  77 }
  78
  79
  80 static void via_tlbflush(struct agp_memory *mem)
  81 {
  82         u32 temp;
  83
  84         pci_read_config_dword(agp_bridge->dev, VIA_GARTCTRL, &temp);
  85         temp |= (1<<7);
  86         pci_write_config_dword(agp_bridge->dev, VIA_GARTCTRL, temp);
  87         temp &= ~(1<<7);
  88         pci_write_config_dword(agp_bridge->dev, VIA_GARTCTRL, temp);
  89 }
  90
  91
  92 static const struct aper_size_info_8 via_generic_sizes[9] =
  93 {
  94         {256, 65536, 6, 0},
  95         {128, 32768, 5, 128},
  96         {64, 16384, 4, 192},
  97         {32, 8192, 3, 224},
  98         {16, 4096, 2, 240},
  99         {8, 2048, 1, 248},
 100         {4, 1024, 0, 252},
 101         {2, 512, 0, 254},
 102         {1, 256, 0, 255}
 103 };
 104
 105
 106 static int via_fetch_size_agp3(void)
 107 {
 108         int i;
 109         u16 temp;
 110         struct aper_size_info_16 *values;
 111
 112         values = A_SIZE_16(agp_bridge->driver->aperture_sizes);
 113         pci_read_config_word(agp_bridge->dev, VIA_AGP3_APSIZE, &temp);
 114         temp &= 0xfff;
 115
 116         for (i = 0; i < agp_bridge->driver->num_aperture_sizes; i++) {
 117                 if (temp == values[i].size_value) {
 118                         agp_bridge->previous_size =
 119                                 agp_bridge->current_size = (void *) (values + i);
 120                         agp_bridge->aperture_size_idx = i;
 121                         return values[i].size;
 122                 }
 123         }
 124         return 0;
 125 }
 126
 127
 128 static int via_configure_agp3(void)
 129 {
 130         u32 temp;
 131         struct aper_size_info_16 *current_size;
 132
 133         current_size = A_SIZE_16(agp_bridge->current_size);
 134
 135         /* address to map to */
 136         agp_bridge->gart_bus_addr = pci_bus_address(agp_bridge->dev,
 137                                                     AGP_APERTURE_BAR);
 138
 139         /* attbase - aperture GATT base */
 140         pci_write_config_dword(agp_bridge->dev, VIA_AGP3_ATTBASE,
 141                 agp_bridge->gatt_bus_addr & 0xfffff000);
 142
 143         /* 1. Enable GTLB in RX90<7>, all AGP aperture access needs to fetch
 144          *    translation table first.
 145          * 2. Enable AGP aperture in RX91<0>. This bit controls the enabling of the
 146          *    graphics AGP aperture for the AGP3.0 port.
 147          */
 148         pci_read_config_dword(agp_bridge->dev, VIA_AGP3_GARTCTRL, &temp);
 149         pci_write_config_dword(agp_bridge->dev, VIA_AGP3_GARTCTRL, temp | (3<<7));
 150         return 0;
 151 }
 152
 153
 154 static void via_cleanup_agp3(void)
 155 {
 156         struct aper_size_info_16 *previous_size;
 157
 158         previous_size = A_SIZE_16(agp_bridge->previous_size);
 159         pci_write_config_byte(agp_bridge->dev, VIA_APSIZE, previous_size->size_value);
 160 }
 161
 162
 163 static void via_tlbflush_agp3(struct agp_memory *mem)
 164 {
 165         u32 temp;
 166
 167         pci_read_config_dword(agp_bridge->dev, VIA_AGP3_GARTCTRL, &temp);
 168         pci_write_config_dword(agp_bridge->dev, VIA_AGP3_GARTCTRL, temp & ~(1<<7));
 169         pci_write_config_dword(agp_bridge->dev, VIA_AGP3_GARTCTRL, temp);
 170 }
 171
 172
 173 static const struct agp_bridge_driver via_agp3_driver = {
 174         .owner                  = THIS_MODULE,
 175         .aperture_sizes         = agp3_generic_sizes,
 176         .size_type              = U8_APER_SIZE,
 177         .num_aperture_sizes     = 10,
 178         .needs_scratch_page     = true,
 179         .configure              = via_configure_agp3,
 180         .fetch_size             = via_fetch_size_agp3,
 181         .cleanup                = via_cleanup_agp3,
 182         .tlb_flush              = via_tlbflush_agp3,
 183         .mask_memory            = agp_generic_mask_memory,
 184         .masks                  = NULL,
 185         .agp_enable             = agp_generic_enable,
 186         .cache_flush            = global_cache_flush,
 187         .create_gatt_table      = agp_generic_create_gatt_table,
 188         .free_gatt_table        = agp_generic_free_gatt_table,
 189         .insert_memory          = agp_generic_insert_memory,
 190         .remove_memory          = agp_generic_remove_memory,
 191         .alloc_by_type          = agp_generic_alloc_by_type,
 192         .free_by_type           = agp_generic_free_by_type,
 193         .agp_alloc_page         = agp_generic_alloc_page,
 194         .agp_alloc_pages        = agp_generic_alloc_pages,
 195         .agp_destroy_page       = agp_generic_destroy_page,
 196         .agp_destroy_pages      = agp_generic_destroy_pages,
 197         .agp_type_to_mask_type  = agp_generic_type_to_mask_type,
 198 };
 199
 200 static const struct agp_bridge_driver via_driver = {
 201         .owner                  = THIS_MODULE,
 202         .aperture_sizes         = via_generic_sizes,
 203         .size_type              = U8_APER_SIZE,
 204         .num_aperture_sizes     = 9,
 205         .needs_scratch_page     = true,
 206         .configure              = via_configure,
 207         .fetch_size             = via_fetch_size,
 208         .cleanup                = via_cleanup,
 209         .tlb_flush              = via_tlbflush,
 210         .mask_memory            = agp_generic_mask_memory,
 211         .masks                  = NULL,
 212         .agp_enable             = agp_generic_enable,
 213         .cache_flush            = global_cache_flush,
 214         .create_gatt_table      = agp_generic_create_gatt_table,
 215         .free_gatt_table        = agp_generic_free_gatt_table,
 216         .insert_memory          = agp_generic_insert_memory,
 217         .remove_memory          = agp_generic_remove_memory,
 218         .alloc_by_type          = agp_generic_alloc_by_type,
 219         .free_by_type           = agp_generic_free_by_type,
 220         .agp_alloc_page         = agp_generic_alloc_page,
 221         .agp_alloc_pages        = agp_generic_alloc_pages,
 222         .agp_destroy_page       = agp_generic_destroy_page,
 223         .agp_destroy_pages      = agp_generic_destroy_pages,
 224         .agp_type_to_mask_type  = agp_generic_type_to_mask_type,
 225 };
 226
 227 static struct agp_device_ids via_agp_device_ids[] =
 228 {
 229         {
 230                 .device_id      = PCI_DEVICE_ID_VIA_82C597_0,
 231                 .chipset_name   = "Apollo VP3",
 232         },
 233
 234         {
 235                 .device_id      = PCI_DEVICE_ID_VIA_82C598_0,
 236                 .chipset_name   = "Apollo MVP3",
 237         },
 238
 239         {
 240                 .device_id      = PCI_DEVICE_ID_VIA_8501_0,
 241                 .chipset_name   = "Apollo MVP4",
 242         },
 243
 244         /* VT8601 */
 245         {
 246                 .device_id      = PCI_DEVICE_ID_VIA_8601_0,
 247                 .chipset_name   = "Apollo ProMedia/PLE133Ta",
 248         },
 249
 250         /* VT82C693A / VT28C694T */
 251         {
 252                 .device_id      = PCI_DEVICE_ID_VIA_82C691_0,
 253                 .chipset_name   = "Apollo Pro 133",
 254         },
 255
 256         {
 257                 .device_id      = PCI_DEVICE_ID_VIA_8371_0,
 258                 .chipset_name   = "KX133",
 259         },
 260
 261         /* VT8633 */
 262         {
 263                 .device_id      = PCI_DEVICE_ID_VIA_8633_0,
 264                 .chipset_name   = "Pro 266",
 265         },
 266
 267         {
 268                 .device_id      = PCI_DEVICE_ID_VIA_XN266,
 269                 .chipset_name   = "Apollo Pro266",
 270         },
 271
 272         /* VT8361 */
 273         {
 274                 .device_id      = PCI_DEVICE_ID_VIA_8361,
 275                 .chipset_name   = "KLE133",
 276         },
 277
 278         /* VT8365 / VT8362 */
 279         {
 280                 .device_id      = PCI_DEVICE_ID_VIA_8363_0,
 281                 .chipset_name   = "Twister-K/KT133x/KM133",
 282         },
 283
 284         /* VT8753A */
 285         {
 286                 .device_id      = PCI_DEVICE_ID_VIA_8753_0,
 287                 .chipset_name   = "P4X266",
 288         },
 289
 290         /* VT8366 */
 291         {
 292                 .device_id      = PCI_DEVICE_ID_VIA_8367_0,
 293                 .chipset_name   = "KT266/KY266x/KT333",
 294         },
 295
 296         /* VT8633 (for CuMine/ Celeron) */
 297         {
 298                 .device_id      = PCI_DEVICE_ID_VIA_8653_0,
 299                 .chipset_name   = "Pro266T",
 300         },
 301
 302         /* KM266 / PM266 */
 303         {
 304                 .device_id      = PCI_DEVICE_ID_VIA_XM266,
 305                 .chipset_name   = "PM266/KM266",
 306         },
 307
 308         /* CLE266 */
 309         {
 310                 .device_id      = PCI_DEVICE_ID_VIA_862X_0,
 311                 .chipset_name   = "CLE266",
 312         },
 313
 314         {
 315                 .device_id      = PCI_DEVICE_ID_VIA_8377_0,
 316                 .chipset_name   = "KT400/KT400A/KT600",
 317         },
 318
 319         /* VT8604 / VT8605 / VT8603
 320          * (Apollo Pro133A chipset with S3 Savage4) */
 321         {
 322                 .device_id      = PCI_DEVICE_ID_VIA_8605_0,
 323                 .chipset_name   = "ProSavage PM133/PL133/PN133"
 324         },
 325
 326         /* P4M266x/P4N266 */
 327         {
 328                 .device_id      = PCI_DEVICE_ID_VIA_8703_51_0,
 329                 .chipset_name   = "P4M266x/P4N266",
 330         },
 331
 332         /* VT8754 */
 333         {
 334                 .device_id      = PCI_DEVICE_ID_VIA_8754C_0,
 335                 .chipset_name   = "PT800",
 336         },
 337
 338         /* P4X600 */
 339         {
 340                 .device_id      = PCI_DEVICE_ID_VIA_8763_0,
 341                 .chipset_name   = "P4X600"
 342         },
 343
 344         /* KM400 */
 345         {
 346                 .device_id      = PCI_DEVICE_ID_VIA_8378_0,
 347                 .chipset_name   = "KM400/KM400A",
 348         },
 349
 350         /* PT880 */
 351         {
 352                 .device_id      = PCI_DEVICE_ID_VIA_PT880,
 353                 .chipset_name   = "PT880",
 354         },
 355
 356         /* PT880 Ultra */
 357         {
 358                 .device_id      = PCI_DEVICE_ID_VIA_PT880ULTRA,
 359                 .chipset_name   = "PT880 Ultra",
 360         },
 361
 362         /* PT890 */
 363         {
 364                 .device_id      = PCI_DEVICE_ID_VIA_8783_0,
 365                 .chipset_name   = "PT890",
 366         },
 367
 368         /* PM800/PN800/PM880/PN880 */
 369         {
 370                 .device_id      = PCI_DEVICE_ID_VIA_PX8X0_0,
 371                 .chipset_name   = "PM800/PN800/PM880/PN880",
 372         },
 373         /* KT880 */
 374         {
 375                 .device_id      = PCI_DEVICE_ID_VIA_3269_0,
 376                 .chipset_name   = "KT880",
 377         },
 378         /* KTxxx/Px8xx */
 379         {
 380                 .device_id      = PCI_DEVICE_ID_VIA_83_87XX_1,
 381                 .chipset_name   = "VT83xx/VT87xx/KTxxx/Px8xx",
 382         },
 383         /* P4M800 */
 384         {
 385                 .device_id      = PCI_DEVICE_ID_VIA_3296_0,
 386                 .chipset_name   = "P4M800",
 387         },
 388         /* P4M800CE */
 389         {
 390                 .device_id      = PCI_DEVICE_ID_VIA_P4M800CE,
 391                 .chipset_name   = "VT3314",
 392         },
 393         /* VT3324 / CX700 */
 394         {
 395                 .device_id  = PCI_DEVICE_ID_VIA_VT3324,
 396                 .chipset_name   = "CX700",
 397         },
 398         /* VT3336 - this is a chipset for AMD Athlon/K8 CPU. Due to K8's unique
 399          * architecture, the AGP resource and behavior are different from
 400          * the traditional AGP which resides only in chipset. AGP is used
 401          * by 3D driver which wasn't available for the VT3336 and VT3364
 402          * generation until now.  Unfortunately, by testing, VT3364 works
 403          * but VT3336 doesn't. - explanation from via, just leave this as
 404          * as a placeholder to avoid future patches adding it back in.
 405          */
 406 #if 0
 407         {
 408                 .device_id  = PCI_DEVICE_ID_VIA_VT3336,
 409                 .chipset_name   = "VT3336",
 410         },
 411 #endif
 412         /* P4M890 */
 413         {
 414                 .device_id  = PCI_DEVICE_ID_VIA_P4M890,
 415                 .chipset_name   = "P4M890",
 416         },
 417         /* P4M900 */
 418         {
 419                 .device_id  = PCI_DEVICE_ID_VIA_VT3364,
 420                 .chipset_name   = "P4M900",
 421         },
 422         { }, /* dummy final entry, always present */
 423 };
 424
 425
 426 /*
 427  * VIA's AGP3 chipsets do magick to put the AGP bridge compliant
 428  * with the same standards version as the graphics card.
 429  */
 430 static void check_via_agp3 (struct agp_bridge_data *bridge)
 431 {
 432         u8 reg;
 433
 434         pci_read_config_byte(bridge->dev, VIA_AGPSEL, &reg);
 435         /* Check AGP 2.0 compatibility mode. */
 436         if ((reg & (1<<1))==0)
 437                 bridge->driver = &via_agp3_driver;
 438 }
 439
 440
 441 static int agp_via_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 442 {
 443         struct agp_device_ids *devs = via_agp_device_ids;
 444         struct agp_bridge_data *bridge;
 445         int j = 0;
 446         u8 cap_ptr;
 447
 448         cap_ptr = pci_find_capability(pdev, PCI_CAP_ID_AGP);
 449         if (!cap_ptr)
 450                 return -ENODEV;
 451
 452         j = ent - agp_via_pci_table;
 453         printk (KERN_INFO PFX "Detected VIA %s chipset\n", devs[j].chipset_name);
 454
 455         bridge = agp_alloc_bridge();
 456         if (!bridge)
 457                 return -ENOMEM;
 458
 459         bridge->dev = pdev;
 460         bridge->capndx = cap_ptr;
 461         bridge->driver = &via_driver;
 462
 463         /*
 464          * Garg, there are KT400s with KT266 IDs.
 465          */
 466         if (pdev->device == PCI_DEVICE_ID_VIA_8367_0) {
 467                 /* Is there a KT400 subsystem ? */
 468                 if (pdev->subsystem_device == PCI_DEVICE_ID_VIA_8377_0) {
 469                         printk(KERN_INFO PFX "Found KT400 in disguise as a KT266.\n");
 470                         check_via_agp3(bridge);
 471                 }
 472         }
 473
 474         /* If this is an AGP3 bridge, check which mode its in and adjust. */
 475         get_agp_version(bridge);
 476         if (bridge->major_version >= 3)
 477                 check_via_agp3(bridge);
 478
 479         /* Fill in the mode register */
 480         pci_read_config_dword(pdev,
 481                         bridge->capndx+PCI_AGP_STATUS, &bridge->mode);
 482
 483         pci_set_drvdata(pdev, bridge);
 484         return agp_add_bridge(bridge);
 485 }
 486
 487 static void agp_via_remove(struct pci_dev *pdev)
 488 {
 489         struct agp_bridge_data *bridge = pci_get_drvdata(pdev);
 490
 491         agp_remove_bridge(bridge);
 492         agp_put_bridge(bridge);
 493 }
 494
 495 #ifdef CONFIG_PM
 496
 497 static int agp_via_suspend(struct pci_dev *pdev, pm_message_t state)
 498 {
 499         pci_save_state (pdev);
 500         pci_set_power_state (pdev, PCI_D3hot);
 501
 502         return 0;
 503 }
 504
 505 static int agp_via_resume(struct pci_dev *pdev)
 506 {
 507         struct agp_bridge_data *bridge = pci_get_drvdata(pdev);
 508
 509         pci_set_power_state (pdev, PCI_D0);
 510         pci_restore_state(pdev);
 511
 512         if (bridge->driver == &via_agp3_driver)
 513                 return via_configure_agp3();
 514         else if (bridge->driver == &via_driver)
 515                 return via_configure();
 516
 517         return 0;
 518 }
 519
 520 #endif /* CONFIG_PM */
 521
 522 /* must be the same order as name table above */
 523 static const struct pci_device_id agp_via_pci_table[] = {
 524 #define ID(x) \
 525         {                                               \
 526         .class          = (PCI_CLASS_BRIDGE_HOST << 8), \
 527         .class_mask     = ~0,                           \
 528         .vendor         = PCI_VENDOR_ID_VIA,            \
 529         .device         = x,                            \
 530         .subvendor      = PCI_ANY_ID,                   \
 531         .subdevice      = PCI_ANY_ID,                   \
 532         }
 533         ID(PCI_DEVICE_ID_VIA_82C597_0),
 534         ID(PCI_DEVICE_ID_VIA_82C598_0),
 535         ID(PCI_DEVICE_ID_VIA_8501_0),
 536         ID(PCI_DEVICE_ID_VIA_8601_0),
 537         ID(PCI_DEVICE_ID_VIA_82C691_0),
 538         ID(PCI_DEVICE_ID_VIA_8371_0),
 539         ID(PCI_DEVICE_ID_VIA_8633_0),
 540         ID(PCI_DEVICE_ID_VIA_XN266),
 541         ID(PCI_DEVICE_ID_VIA_8361),
 542         ID(PCI_DEVICE_ID_VIA_8363_0),
 543         ID(PCI_DEVICE_ID_VIA_8753_0),
 544         ID(PCI_DEVICE_ID_VIA_8367_0),
 545         ID(PCI_DEVICE_ID_VIA_8653_0),
 546         ID(PCI_DEVICE_ID_VIA_XM266),
 547         ID(PCI_DEVICE_ID_VIA_862X_0),
 548         ID(PCI_DEVICE_ID_VIA_8377_0),
 549         ID(PCI_DEVICE_ID_VIA_8605_0),
 550         ID(PCI_DEVICE_ID_VIA_8703_51_0),
 551         ID(PCI_DEVICE_ID_VIA_8754C_0),
 552         ID(PCI_DEVICE_ID_VIA_8763_0),
 553         ID(PCI_DEVICE_ID_VIA_8378_0),
 554         ID(PCI_DEVICE_ID_VIA_PT880),
 555         ID(PCI_DEVICE_ID_VIA_PT880ULTRA),
 556         ID(PCI_DEVICE_ID_VIA_8783_0),
 557         ID(PCI_DEVICE_ID_VIA_PX8X0_0),
 558         ID(PCI_DEVICE_ID_VIA_3269_0),
 559         ID(PCI_DEVICE_ID_VIA_83_87XX_1),
 560         ID(PCI_DEVICE_ID_VIA_3296_0),
 561         ID(PCI_DEVICE_ID_VIA_P4M800CE),
 562         ID(PCI_DEVICE_ID_VIA_VT3324),
 563         ID(PCI_DEVICE_ID_VIA_P4M890),
 564         ID(PCI_DEVICE_ID_VIA_VT3364),
 565         { }
 566 };
 567
 568 MODULE_DEVICE_TABLE(pci, agp_via_pci_table);
 569
 570
 571 static struct pci_driver agp_via_pci_driver = {
 572         .name           = "agpgart-via",
 573         .id_table       = agp_via_pci_table,
 574         .probe          = agp_via_probe,
 575         .remove         = agp_via_remove,
 576 #ifdef CONFIG_PM
 577         .suspend        = agp_via_suspend,
 578         .resume         = agp_via_resume,
 579 #endif
 580 };
 581
 582
 583 static int __init agp_via_init(void)
 584 {
 585         if (agp_off)
 586                 return -EINVAL;
 587         return pci_register_driver(&agp_via_pci_driver);
 588 }
 589
 590 static void __exit agp_via_cleanup(void)
 591 {
 592         pci_unregister_driver(&agp_via_pci_driver);
 593 }
 594
 595 module_init(agp_via_init);
 596 module_exit(agp_via_cleanup);
 597
 598 MODULE_LICENSE("GPL");
 599 MODULE_AUTHOR("Dave Jones");