drivers/char/agp/sis-agp.c

   1 /*
   2  * SiS AGPGART routines.
   3  */
   4
   5 #include <linux/module.h>
   6 #include <linux/pci.h>
   7 #include <linux/init.h>
   8 #include <linux/agp_backend.h>
   9 #include <linux/delay.h>
  10 #include "agp.h"
  11
  12 #define SIS_ATTBASE     0x90
  13 #define SIS_APSIZE      0x94
  14 #define SIS_TLBCNTRL    0x97
  15 #define SIS_TLBFLUSH    0x98
  16
  17 #define PCI_DEVICE_ID_SI_662    0x0662
  18 #define PCI_DEVICE_ID_SI_671    0x0671
  19
  20 static bool agp_sis_force_delay = 0;
  21 static int agp_sis_agp_spec = -1;
  22
  23 static int sis_fetch_size(void)
  24 {
  25         u8 temp_size;
  26         int i;
  27         struct aper_size_info_8 *values;
  28
  29         pci_read_config_byte(agp_bridge->dev, SIS_APSIZE, &temp_size);
  30         values = A_SIZE_8(agp_bridge->driver->aperture_sizes);
  31         for (i = 0; i < agp_bridge->driver->num_aperture_sizes; i++) {
  32                 if ((temp_size == values[i].size_value) ||
  33                     ((temp_size & ~(0x07)) ==
  34                      (values[i].size_value & ~(0x07)))) {
  35                         agp_bridge->previous_size =
  36                             agp_bridge->current_size = (void *) (values + i);
  37
  38                         agp_bridge->aperture_size_idx = i;
  39                         return values[i].size;
  40                 }
  41         }
  42
  43         return 0;
  44 }
  45
  46 static void sis_tlbflush(struct agp_memory *mem)
  47 {
  48         pci_write_config_byte(agp_bridge->dev, SIS_TLBFLUSH, 0x02);
  49 }
  50
  51 static int sis_configure(void)
  52 {
  53         struct aper_size_info_8 *current_size;
  54
  55         current_size = A_SIZE_8(agp_bridge->current_size);
  56         pci_write_config_byte(agp_bridge->dev, SIS_TLBCNTRL, 0x05);
  57         agp_bridge->gart_bus_addr = pci_bus_address(agp_bridge->dev,
  58                                                     AGP_APERTURE_BAR);
  59         pci_write_config_dword(agp_bridge->dev, SIS_ATTBASE,
  60                                agp_bridge->gatt_bus_addr);
  61         pci_write_config_byte(agp_bridge->dev, SIS_APSIZE,
  62                               current_size->size_value);
  63         return 0;
  64 }
  65
  66 static void sis_cleanup(void)
  67 {
  68         struct aper_size_info_8 *previous_size;
  69
  70         previous_size = A_SIZE_8(agp_bridge->previous_size);
  71         pci_write_config_byte(agp_bridge->dev, SIS_APSIZE,
  72                               (previous_size->size_value & ~(0x03)));
  73 }
  74
  75 static void sis_delayed_enable(struct agp_bridge_data *bridge, u32 mode)
  76 {
  77         struct pci_dev *device = NULL;
  78         u32 command;
  79         int rate;
  80
  81         dev_info(&agp_bridge->dev->dev, "AGP %d.%d bridge\n",
  82                  agp_bridge->major_version, agp_bridge->minor_version);
  83
  84         pci_read_config_dword(agp_bridge->dev, agp_bridge->capndx + PCI_AGP_STATUS, &command);
  85         command = agp_collect_device_status(bridge, mode, command);
  86         command |= AGPSTAT_AGP_ENABLE;
  87         rate = (command & 0x7) << 2;
  88
  89         for_each_pci_dev(device) {
  90                 u8 agp = pci_find_capability(device, PCI_CAP_ID_AGP);
  91                 if (!agp)
  92                         continue;
  93
  94                 dev_info(&agp_bridge->dev->dev, "putting AGP V3 device at %s into %dx mode\n",
  95                          pci_name(device), rate);
  96
  97                 pci_write_config_dword(device, agp + PCI_AGP_COMMAND, command);
  98
  99                 /*
 100                  * Weird: on some sis chipsets any rate change in the target
 101                  * command register triggers a 5ms screwup during which the master
 102                  * cannot be configured
 103                  */
 104                 if (device->device == bridge->dev->device) {
 105                         dev_info(&agp_bridge->dev->dev, "SiS delay workaround: giving bridge time to recover\n");
 106                         msleep(10);
 107                 }
 108         }
 109 }
 110
 111 static const struct aper_size_info_8 sis_generic_sizes[7] =
 112 {
 113         {256, 65536, 6, 99},
 114         {128, 32768, 5, 83},
 115         {64, 16384, 4, 67},
 116         {32, 8192, 3, 51},
 117         {16, 4096, 2, 35},
 118         {8, 2048, 1, 19},
 119         {4, 1024, 0, 3}
 120 };
 121
 122 static struct agp_bridge_driver sis_driver = {
 123         .owner                  = THIS_MODULE,
 124         .aperture_sizes         = sis_generic_sizes,
 125         .size_type              = U8_APER_SIZE,
 126         .num_aperture_sizes     = 7,
 127         .needs_scratch_page     = true,
 128         .configure              = sis_configure,
 129         .fetch_size             = sis_fetch_size,
 130         .cleanup                = sis_cleanup,
 131         .tlb_flush              = sis_tlbflush,
 132         .mask_memory            = agp_generic_mask_memory,
 133         .masks                  = NULL,
 134         .agp_enable             = agp_generic_enable,
 135         .cache_flush            = global_cache_flush,
 136         .create_gatt_table      = agp_generic_create_gatt_table,
 137         .free_gatt_table        = agp_generic_free_gatt_table,
 138         .insert_memory          = agp_generic_insert_memory,
 139         .remove_memory          = agp_generic_remove_memory,
 140         .alloc_by_type          = agp_generic_alloc_by_type,
 141         .free_by_type           = agp_generic_free_by_type,
 142         .agp_alloc_page         = agp_generic_alloc_page,
 143         .agp_alloc_pages        = agp_generic_alloc_pages,
 144         .agp_destroy_page       = agp_generic_destroy_page,
 145         .agp_destroy_pages      = agp_generic_destroy_pages,
 146         .agp_type_to_mask_type  = agp_generic_type_to_mask_type,
 147 };
 148
 149 // chipsets that require the 'delay hack'
 150 static int sis_broken_chipsets[] = {
 151         PCI_DEVICE_ID_SI_648,
 152         PCI_DEVICE_ID_SI_746,
 153         0 // terminator
 154 };
 155
 156 static void sis_get_driver(struct agp_bridge_data *bridge)
 157 {
 158         int i;
 159
 160         for (i=0; sis_broken_chipsets[i]!=0; ++i)
 161                 if (bridge->dev->device==sis_broken_chipsets[i])
 162                         break;
 163
 164         if (sis_broken_chipsets[i] || agp_sis_force_delay)
 165                 sis_driver.agp_enable=sis_delayed_enable;
 166
 167         // sis chipsets that indicate less than agp3.5
 168         // are not actually fully agp3 compliant
 169         if ((agp_bridge->major_version == 3 && agp_bridge->minor_version >= 5
 170              && agp_sis_agp_spec!=0) || agp_sis_agp_spec==1) {
 171                 sis_driver.aperture_sizes = agp3_generic_sizes;
 172                 sis_driver.size_type = U16_APER_SIZE;
 173                 sis_driver.num_aperture_sizes = AGP_GENERIC_SIZES_ENTRIES;
 174                 sis_driver.configure = agp3_generic_configure;
 175                 sis_driver.fetch_size = agp3_generic_fetch_size;
 176                 sis_driver.cleanup = agp3_generic_cleanup;
 177                 sis_driver.tlb_flush = agp3_generic_tlbflush;
 178         }
 179 }
 180
 181
 182 static int agp_sis_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 183 {
 184         struct agp_bridge_data *bridge;
 185         u8 cap_ptr;
 186
 187         cap_ptr = pci_find_capability(pdev, PCI_CAP_ID_AGP);
 188         if (!cap_ptr)
 189                 return -ENODEV;
 190
 191
 192         dev_info(&pdev->dev, "SiS chipset [%04x/%04x]\n",
 193                  pdev->vendor, pdev->device);
 194         bridge = agp_alloc_bridge();
 195         if (!bridge)
 196                 return -ENOMEM;
 197
 198         bridge->driver = &sis_driver;
 199         bridge->dev = pdev;
 200         bridge->capndx = cap_ptr;
 201
 202         get_agp_version(bridge);
 203
 204         /* Fill in the mode register */
 205         pci_read_config_dword(pdev, bridge->capndx+PCI_AGP_STATUS, &bridge->mode);
 206         sis_get_driver(bridge);
 207
 208         pci_set_drvdata(pdev, bridge);
 209         return agp_add_bridge(bridge);
 210 }
 211
 212 static void agp_sis_remove(struct pci_dev *pdev)
 213 {
 214         struct agp_bridge_data *bridge = pci_get_drvdata(pdev);
 215
 216         agp_remove_bridge(bridge);
 217         agp_put_bridge(bridge);
 218 }
 219
 220 #define agp_sis_suspend NULL
 221
 222 static int __maybe_unused agp_sis_resume(
 223         __attribute__((unused)) struct device *dev)
 224 {
 225         return sis_driver.configure();
 226 }
 227
 228 static const struct pci_device_id agp_sis_pci_table[] = {
 229         {
 230                 .class          = (PCI_CLASS_BRIDGE_HOST << 8),
 231                 .class_mask     = ~0,
 232                 .vendor         = PCI_VENDOR_ID_SI,
 233                 .device         = PCI_DEVICE_ID_SI_5591,
 234                 .subvendor      = PCI_ANY_ID,
 235                 .subdevice      = PCI_ANY_ID,
 236         },
 237         {
 238                 .class          = (PCI_CLASS_BRIDGE_HOST << 8),
 239                 .class_mask     = ~0,
 240                 .vendor         = PCI_VENDOR_ID_SI,
 241                 .device         = PCI_DEVICE_ID_SI_530,
 242                 .subvendor      = PCI_ANY_ID,
 243                 .subdevice      = PCI_ANY_ID,
 244         },
 245         {
 246                 .class          = (PCI_CLASS_BRIDGE_HOST << 8),
 247                 .class_mask     = ~0,
 248                 .vendor         = PCI_VENDOR_ID_SI,
 249                 .device         = PCI_DEVICE_ID_SI_540,
 250                 .subvendor      = PCI_ANY_ID,
 251                 .subdevice      = PCI_ANY_ID,
 252         },
 253         {
 254                 .class          = (PCI_CLASS_BRIDGE_HOST << 8),
 255                 .class_mask     = ~0,
 256                 .vendor         = PCI_VENDOR_ID_SI,
 257                 .device         = PCI_DEVICE_ID_SI_550,
 258                 .subvendor      = PCI_ANY_ID,
 259                 .subdevice      = PCI_ANY_ID,
 260         },
 261         {
 262                 .class          = (PCI_CLASS_BRIDGE_HOST << 8),
 263                 .class_mask     = ~0,
 264                 .vendor         = PCI_VENDOR_ID_SI,
 265                 .device         = PCI_DEVICE_ID_SI_620,
 266                 .subvendor      = PCI_ANY_ID,
 267                 .subdevice      = PCI_ANY_ID,
 268         },
 269         {
 270                 .class          = (PCI_CLASS_BRIDGE_HOST << 8),
 271                 .class_mask     = ~0,
 272                 .vendor         = PCI_VENDOR_ID_SI,
 273                 .device         = PCI_DEVICE_ID_SI_630,
 274                 .subvendor      = PCI_ANY_ID,
 275                 .subdevice      = PCI_ANY_ID,
 276         },
 277         {
 278                 .class          = (PCI_CLASS_BRIDGE_HOST << 8),
 279                 .class_mask     = ~0,
 280                 .vendor         = PCI_VENDOR_ID_SI,
 281                 .device         = PCI_DEVICE_ID_SI_635,
 282                 .subvendor      = PCI_ANY_ID,
 283                 .subdevice      = PCI_ANY_ID,
 284         },
 285         {
 286                 .class          = (PCI_CLASS_BRIDGE_HOST << 8),
 287                 .class_mask     = ~0,
 288                 .vendor         = PCI_VENDOR_ID_SI,
 289                 .device         = PCI_DEVICE_ID_SI_645,
 290                 .subvendor      = PCI_ANY_ID,
 291                 .subdevice      = PCI_ANY_ID,
 292         },
 293         {
 294                 .class          = (PCI_CLASS_BRIDGE_HOST << 8),
 295                 .class_mask     = ~0,
 296                 .vendor         = PCI_VENDOR_ID_SI,
 297                 .device         = PCI_DEVICE_ID_SI_646,
 298                 .subvendor      = PCI_ANY_ID,
 299                 .subdevice      = PCI_ANY_ID,
 300         },
 301         {
 302                 .class          = (PCI_CLASS_BRIDGE_HOST << 8),
 303                 .class_mask     = ~0,
 304                 .vendor         = PCI_VENDOR_ID_SI,
 305                 .device         = PCI_DEVICE_ID_SI_648,
 306                 .subvendor      = PCI_ANY_ID,
 307                 .subdevice      = PCI_ANY_ID,
 308         },
 309         {
 310                 .class          = (PCI_CLASS_BRIDGE_HOST << 8),
 311                 .class_mask     = ~0,
 312                 .vendor         = PCI_VENDOR_ID_SI,
 313                 .device         = PCI_DEVICE_ID_SI_650,
 314                 .subvendor      = PCI_ANY_ID,
 315                 .subdevice      = PCI_ANY_ID,
 316         },
 317         {
 318                 .class          = (PCI_CLASS_BRIDGE_HOST << 8),
 319                 .class_mask     = ~0,
 320                 .vendor         = PCI_VENDOR_ID_SI,
 321                 .device         = PCI_DEVICE_ID_SI_651,
 322                 .subvendor      = PCI_ANY_ID,
 323                 .subdevice      = PCI_ANY_ID,
 324         },
 325         {
 326                 .class          = (PCI_CLASS_BRIDGE_HOST << 8),
 327                 .class_mask     = ~0,
 328                 .vendor         = PCI_VENDOR_ID_SI,
 329                 .device         = PCI_DEVICE_ID_SI_655,
 330                 .subvendor      = PCI_ANY_ID,
 331                 .subdevice      = PCI_ANY_ID,
 332         },
 333         {
 334                 .class          = (PCI_CLASS_BRIDGE_HOST << 8),
 335                 .class_mask     = ~0,
 336                 .vendor         = PCI_VENDOR_ID_SI,
 337                 .device         = PCI_DEVICE_ID_SI_661,
 338                 .subvendor      = PCI_ANY_ID,
 339                 .subdevice      = PCI_ANY_ID,
 340         },
 341         {
 342                 .class          = (PCI_CLASS_BRIDGE_HOST << 8),
 343                 .class_mask     = ~0,
 344                 .vendor         = PCI_VENDOR_ID_SI,
 345                 .device         = PCI_DEVICE_ID_SI_662,
 346                 .subvendor      = PCI_ANY_ID,
 347                 .subdevice      = PCI_ANY_ID,
 348         },
 349         {
 350                 .class          = (PCI_CLASS_BRIDGE_HOST << 8),
 351                 .class_mask     = ~0,
 352                 .vendor         = PCI_VENDOR_ID_SI,
 353                 .device         = PCI_DEVICE_ID_SI_671,
 354                 .subvendor      = PCI_ANY_ID,
 355                 .subdevice      = PCI_ANY_ID,
 356         },
 357         {
 358                 .class          = (PCI_CLASS_BRIDGE_HOST << 8),
 359                 .class_mask     = ~0,
 360                 .vendor         = PCI_VENDOR_ID_SI,
 361                 .device         = PCI_DEVICE_ID_SI_730,
 362                 .subvendor      = PCI_ANY_ID,
 363                 .subdevice      = PCI_ANY_ID,
 364         },
 365         {
 366                 .class          = (PCI_CLASS_BRIDGE_HOST << 8),
 367                 .class_mask     = ~0,
 368                 .vendor         = PCI_VENDOR_ID_SI,
 369                 .device         = PCI_DEVICE_ID_SI_735,
 370                 .subvendor      = PCI_ANY_ID,
 371                 .subdevice      = PCI_ANY_ID,
 372         },
 373         {
 374                 .class          = (PCI_CLASS_BRIDGE_HOST << 8),
 375                 .class_mask     = ~0,
 376                 .vendor         = PCI_VENDOR_ID_SI,
 377                 .device         = PCI_DEVICE_ID_SI_740,
 378                 .subvendor      = PCI_ANY_ID,
 379                 .subdevice      = PCI_ANY_ID,
 380         },
 381         {
 382                 .class          = (PCI_CLASS_BRIDGE_HOST << 8),
 383                 .class_mask     = ~0,
 384                 .vendor         = PCI_VENDOR_ID_SI,
 385                 .device         = PCI_DEVICE_ID_SI_741,
 386                 .subvendor      = PCI_ANY_ID,
 387                 .subdevice      = PCI_ANY_ID,
 388         },
 389         {
 390                 .class          = (PCI_CLASS_BRIDGE_HOST << 8),
 391                 .class_mask     = ~0,
 392                 .vendor         = PCI_VENDOR_ID_SI,
 393                 .device         = PCI_DEVICE_ID_SI_745,
 394                 .subvendor      = PCI_ANY_ID,
 395                 .subdevice      = PCI_ANY_ID,
 396         },
 397         {
 398                 .class          = (PCI_CLASS_BRIDGE_HOST << 8),
 399                 .class_mask     = ~0,
 400                 .vendor         = PCI_VENDOR_ID_SI,
 401                 .device         = PCI_DEVICE_ID_SI_746,
 402                 .subvendor      = PCI_ANY_ID,
 403                 .subdevice      = PCI_ANY_ID,
 404         },
 405         { }
 406 };
 407
 408 MODULE_DEVICE_TABLE(pci, agp_sis_pci_table);
 409
 410 static SIMPLE_DEV_PM_OPS(agp_sis_pm_ops, agp_sis_suspend, agp_sis_resume);
 411
 412 static struct pci_driver agp_sis_pci_driver = {
 413         .name           = "agpgart-sis",
 414         .id_table       = agp_sis_pci_table,
 415         .probe          = agp_sis_probe,
 416         .remove         = agp_sis_remove,
 417         .driver.pm      = &agp_sis_pm_ops,
 418 };
 419
 420 static int __init agp_sis_init(void)
 421 {
 422         if (agp_off)
 423                 return -EINVAL;
 424         return pci_register_driver(&agp_sis_pci_driver);
 425 }
 426
 427 static void __exit agp_sis_cleanup(void)
 428 {
 429         pci_unregister_driver(&agp_sis_pci_driver);
 430 }
 431
 432 module_init(agp_sis_init);
 433 module_exit(agp_sis_cleanup);
 434
 435 module_param(agp_sis_force_delay, bool, 0);
 436 MODULE_PARM_DESC(agp_sis_force_delay,"forces sis delay hack");
 437 module_param(agp_sis_agp_spec, int, 0);
 438 MODULE_PARM_DESC(agp_sis_agp_spec,"0=force sis init, 1=force generic agp3 init, default: autodetect");
 439 MODULE_LICENSE("GPL and additional rights");