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