drivers/char/agp/ati-agp.c

   1 /*
   2  * ATi AGPGART routines.
   3  */
   4
   5 #include <linux/types.h>
   6 #include <linux/module.h>
   7 #include <linux/pci.h>
   8 #include <linux/init.h>
   9 #include <linux/string.h>
  10 #include <linux/slab.h>
  11 #include <linux/agp_backend.h>
  12 #include <asm/agp.h>
  13 #include "agp.h"
  14
  15 #define ATI_GART_MMBASE_ADDR    0x14
  16 #define ATI_RS100_APSIZE        0xac
  17 #define ATI_RS100_IG_AGPMODE    0xb0
  18 #define ATI_RS300_APSIZE        0xf8
  19 #define ATI_RS300_IG_AGPMODE    0xfc
  20 #define ATI_GART_FEATURE_ID             0x00
  21 #define ATI_GART_BASE                   0x04
  22 #define ATI_GART_CACHE_SZBASE           0x08
  23 #define ATI_GART_CACHE_CNTRL            0x0c
  24 #define ATI_GART_CACHE_ENTRY_CNTRL      0x10
  25
  26
  27 static const struct aper_size_info_lvl2 ati_generic_sizes[7] =
  28 {
  29         {2048, 524288, 0x0000000c},
  30         {1024, 262144, 0x0000000a},
  31         {512, 131072, 0x00000008},
  32         {256, 65536, 0x00000006},
  33         {128, 32768, 0x00000004},
  34         {64, 16384, 0x00000002},
  35         {32, 8192, 0x00000000}
  36 };
  37
  38 static struct gatt_mask ati_generic_masks[] =
  39 {
  40         { .mask = 1, .type = 0}
  41 };
  42
  43
  44 struct ati_page_map {
  45         unsigned long *real;
  46         unsigned long __iomem *remapped;
  47 };
  48
  49 static struct _ati_generic_private {
  50         volatile u8 __iomem *registers;
  51         struct ati_page_map **gatt_pages;
  52         int num_tables;
  53 } ati_generic_private;
  54
  55 static int ati_create_page_map(struct ati_page_map *page_map)
  56 {
  57         int i, err = 0;
  58
  59         page_map->real = (unsigned long *) __get_free_page(GFP_KERNEL);
  60         if (page_map->real == NULL)
  61                 return -ENOMEM;
  62
  63         SetPageReserved(virt_to_page(page_map->real));
  64         err = map_page_into_agp(virt_to_page(page_map->real));
  65         page_map->remapped = ioremap_nocache(virt_to_gart(page_map->real),
  66                                             PAGE_SIZE);
  67         if (page_map->remapped == NULL || err) {
  68                 ClearPageReserved(virt_to_page(page_map->real));
  69                 free_page((unsigned long) page_map->real);
  70                 page_map->real = NULL;
  71                 return -ENOMEM;
  72         }
  73         /*CACHE_FLUSH();*/
  74         global_cache_flush();
  75
  76         for (i = 0; i < PAGE_SIZE / sizeof(unsigned long); i++) {
  77                 writel(agp_bridge->scratch_page, page_map->remapped+i);
  78                 readl(page_map->remapped+i);    /* PCI Posting. */
  79         }
  80
  81         return 0;
  82 }
  83
  84
  85 static void ati_free_page_map(struct ati_page_map *page_map)
  86 {
  87         unmap_page_from_agp(virt_to_page(page_map->real));
  88         iounmap(page_map->remapped);
  89         ClearPageReserved(virt_to_page(page_map->real));
  90         free_page((unsigned long) page_map->real);
  91 }
  92
  93
  94 static void ati_free_gatt_pages(void)
  95 {
  96         int i;
  97         struct ati_page_map **tables;
  98         struct ati_page_map *entry;
  99
 100         tables = ati_generic_private.gatt_pages;
 101         for (i = 0; i < ati_generic_private.num_tables; i++) {
 102                 entry = tables[i];
 103                 if (entry != NULL) {
 104                         if (entry->real != NULL)
 105                                 ati_free_page_map(entry);
 106                         kfree(entry);
 107                 }
 108         }
 109         kfree(tables);
 110 }
 111
 112
 113 static int ati_create_gatt_pages(int nr_tables)
 114 {
 115         struct ati_page_map **tables;
 116         struct ati_page_map *entry;
 117         int retval = 0;
 118         int i;
 119
 120         tables = kzalloc((nr_tables + 1) * sizeof(struct ati_page_map *),GFP_KERNEL);
 121         if (tables == NULL)
 122                 return -ENOMEM;
 123
 124         for (i = 0; i < nr_tables; i++) {
 125                 entry = kzalloc(sizeof(struct ati_page_map), GFP_KERNEL);
 126                 tables[i] = entry;
 127                 if (entry == NULL) {
 128                         retval = -ENOMEM;
 129                         break;
 130                 }
 131                 retval = ati_create_page_map(entry);
 132                 if (retval != 0)
 133                         break;
 134         }
 135         ati_generic_private.num_tables = i;
 136         ati_generic_private.gatt_pages = tables;
 137
 138         if (retval != 0)
 139                 ati_free_gatt_pages();
 140
 141         return retval;
 142 }
 143
 144 static int is_r200(void)
 145 {
 146         if ((agp_bridge->dev->device == PCI_DEVICE_ID_ATI_RS100) ||
 147             (agp_bridge->dev->device == PCI_DEVICE_ID_ATI_RS200) ||
 148             (agp_bridge->dev->device == PCI_DEVICE_ID_ATI_RS200_B) ||
 149             (agp_bridge->dev->device == PCI_DEVICE_ID_ATI_RS250))
 150                 return 1;
 151         return 0;
 152 }
 153
 154 static int ati_fetch_size(void)
 155 {
 156         int i;
 157         u32 temp;
 158         struct aper_size_info_lvl2 *values;
 159
 160         if (is_r200())
 161                 pci_read_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, &temp);
 162         else
 163                 pci_read_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, &temp);
 164
 165         temp = (temp & 0x0000000e);
 166         values = A_SIZE_LVL2(agp_bridge->driver->aperture_sizes);
 167         for (i = 0; i < agp_bridge->driver->num_aperture_sizes; i++) {
 168                 if (temp == values[i].size_value) {
 169                         agp_bridge->previous_size =
 170                             agp_bridge->current_size = (void *) (values + i);
 171
 172                         agp_bridge->aperture_size_idx = i;
 173                         return values[i].size;
 174                 }
 175         }
 176
 177         return 0;
 178 }
 179
 180 static void ati_tlbflush(struct agp_memory * mem)
 181 {
 182         writel(1, ati_generic_private.registers+ATI_GART_CACHE_CNTRL);
 183         readl(ati_generic_private.registers+ATI_GART_CACHE_CNTRL);      /* PCI Posting. */
 184 }
 185
 186 static void ati_cleanup(void)
 187 {
 188         struct aper_size_info_lvl2 *previous_size;
 189         u32 temp;
 190
 191         previous_size = A_SIZE_LVL2(agp_bridge->previous_size);
 192
 193         /* Write back the previous size and disable gart translation */
 194         if (is_r200()) {
 195                 pci_read_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, &temp);
 196                 temp = ((temp & ~(0x0000000f)) | previous_size->size_value);
 197                 pci_write_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, temp);
 198         } else {
 199                 pci_read_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, &temp);
 200                 temp = ((temp & ~(0x0000000f)) | previous_size->size_value);
 201                 pci_write_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, temp);
 202         }
 203         iounmap((volatile u8 __iomem *)ati_generic_private.registers);
 204 }
 205
 206
 207 static int ati_configure(void)
 208 {
 209         u32 temp;
 210
 211         /* Get the memory mapped registers */
 212         pci_read_config_dword(agp_bridge->dev, ATI_GART_MMBASE_ADDR, &temp);
 213         temp = (temp & 0xfffff000);
 214         ati_generic_private.registers = (volatile u8 __iomem *) ioremap(temp, 4096);
 215
 216         if (!ati_generic_private.registers)
 217                 return -ENOMEM;
 218
 219         if (is_r200())
 220                 pci_write_config_dword(agp_bridge->dev, ATI_RS100_IG_AGPMODE, 0x20000);
 221         else
 222                 pci_write_config_dword(agp_bridge->dev, ATI_RS300_IG_AGPMODE, 0x20000);
 223
 224         /* address to map too */
 225         /*
 226         pci_read_config_dword(agp_bridge.dev, AGP_APBASE, &temp);
 227         agp_bridge.gart_bus_addr = (temp & PCI_BASE_ADDRESS_MEM_MASK);
 228         printk(KERN_INFO PFX "IGP320 gart_bus_addr: %x\n", agp_bridge.gart_bus_addr);
 229         */
 230         writel(0x60000, ati_generic_private.registers+ATI_GART_FEATURE_ID);
 231         readl(ati_generic_private.registers+ATI_GART_FEATURE_ID);       /* PCI Posting.*/
 232
 233         /* SIGNALED_SYSTEM_ERROR @ NB_STATUS */
 234         pci_read_config_dword(agp_bridge->dev, 4, &temp);
 235         pci_write_config_dword(agp_bridge->dev, 4, temp | (1<<14));
 236
 237         /* Write out the address of the gatt table */
 238         writel(agp_bridge->gatt_bus_addr, ati_generic_private.registers+ATI_GART_BASE);
 239         readl(ati_generic_private.registers+ATI_GART_BASE);     /* PCI Posting. */
 240
 241         return 0;
 242 }
 243
 244
 245 #ifdef CONFIG_PM
 246 static int agp_ati_suspend(struct pci_dev *dev, pm_message_t state)
 247 {
 248         pci_save_state(dev);
 249         pci_set_power_state(dev, 3);
 250
 251         return 0;
 252 }
 253
 254 static int agp_ati_resume(struct pci_dev *dev)
 255 {
 256         pci_set_power_state(dev, 0);
 257         pci_restore_state(dev);
 258
 259         return ati_configure();
 260 }
 261 #endif
 262
 263 /*
 264  *Since we don't need contiguous memory we just try
 265  * to get the gatt table once
 266  */
 267
 268 #define GET_PAGE_DIR_OFF(addr) (addr >> 22)
 269 #define GET_PAGE_DIR_IDX(addr) (GET_PAGE_DIR_OFF(addr) - \
 270         GET_PAGE_DIR_OFF(agp_bridge->gart_bus_addr))
 271 #define GET_GATT_OFF(addr) ((addr & 0x003ff000) >> 12)
 272 #undef  GET_GATT
 273 #define GET_GATT(addr) (ati_generic_private.gatt_pages[\
 274         GET_PAGE_DIR_IDX(addr)]->remapped)
 275
 276 static int ati_insert_memory(struct agp_memory * mem,
 277                              off_t pg_start, int type)
 278 {
 279         int i, j, num_entries;
 280         unsigned long __iomem *cur_gatt;
 281         unsigned long addr;
 282
 283         num_entries = A_SIZE_LVL2(agp_bridge->current_size)->num_entries;
 284
 285         if (type != 0 || mem->type != 0)
 286                 return -EINVAL;
 287
 288         if ((pg_start + mem->page_count) > num_entries)
 289                 return -EINVAL;
 290
 291         j = pg_start;
 292         while (j < (pg_start + mem->page_count)) {
 293                 addr = (j * PAGE_SIZE) + agp_bridge->gart_bus_addr;
 294                 cur_gatt = GET_GATT(addr);
 295                 if (!PGE_EMPTY(agp_bridge,readl(cur_gatt+GET_GATT_OFF(addr))))
 296                         return -EBUSY;
 297                 j++;
 298         }
 299
 300         if (mem->is_flushed == FALSE) {
 301                 /*CACHE_FLUSH(); */
 302                 global_cache_flush();
 303                 mem->is_flushed = TRUE;
 304         }
 305
 306         for (i = 0, j = pg_start; i < mem->page_count; i++, j++) {
 307                 addr = (j * PAGE_SIZE) + agp_bridge->gart_bus_addr;
 308                 cur_gatt = GET_GATT(addr);
 309                 writel(agp_bridge->driver->mask_memory(agp_bridge,
 310                         mem->memory[i], mem->type), cur_gatt+GET_GATT_OFF(addr));
 311                 readl(cur_gatt+GET_GATT_OFF(addr));     /* PCI Posting. */
 312         }
 313         agp_bridge->driver->tlb_flush(mem);
 314         return 0;
 315 }
 316
 317 static int ati_remove_memory(struct agp_memory * mem, off_t pg_start,
 318                              int type)
 319 {
 320         int i;
 321         unsigned long __iomem *cur_gatt;
 322         unsigned long addr;
 323
 324         if (type != 0 || mem->type != 0)
 325                 return -EINVAL;
 326
 327         for (i = pg_start; i < (mem->page_count + pg_start); i++) {
 328                 addr = (i * PAGE_SIZE) + agp_bridge->gart_bus_addr;
 329                 cur_gatt = GET_GATT(addr);
 330                 writel(agp_bridge->scratch_page, cur_gatt+GET_GATT_OFF(addr));
 331                 readl(cur_gatt+GET_GATT_OFF(addr)); /* PCI Posting. */
 332         }
 333
 334         agp_bridge->driver->tlb_flush(mem);
 335         return 0;
 336 }
 337
 338 static int ati_create_gatt_table(struct agp_bridge_data *bridge)
 339 {
 340         struct aper_size_info_lvl2 *value;
 341         struct ati_page_map page_dir;
 342         unsigned long addr;
 343         int retval;
 344         u32 temp;
 345         int i;
 346         struct aper_size_info_lvl2 *current_size;
 347
 348         value = A_SIZE_LVL2(agp_bridge->current_size);
 349         retval = ati_create_page_map(&page_dir);
 350         if (retval != 0)
 351                 return retval;
 352
 353         retval = ati_create_gatt_pages(value->num_entries / 1024);
 354         if (retval != 0) {
 355                 ati_free_page_map(&page_dir);
 356                 return retval;
 357         }
 358
 359         agp_bridge->gatt_table_real = (u32 *)page_dir.real;
 360         agp_bridge->gatt_table = (u32 __iomem *) page_dir.remapped;
 361         agp_bridge->gatt_bus_addr = virt_to_gart(page_dir.real);
 362
 363         /* Write out the size register */
 364         current_size = A_SIZE_LVL2(agp_bridge->current_size);
 365
 366         if (is_r200()) {
 367                 pci_read_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, &temp);
 368                 temp = (((temp & ~(0x0000000e)) | current_size->size_value)
 369                         | 0x00000001);
 370                 pci_write_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, temp);
 371                 pci_read_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, &temp);
 372         } else {
 373                 pci_read_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, &temp);
 374                 temp = (((temp & ~(0x0000000e)) | current_size->size_value)
 375                         | 0x00000001);
 376                 pci_write_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, temp);
 377                 pci_read_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, &temp);
 378         }
 379
 380         /*
 381          * Get the address for the gart region.
 382          * This is a bus address even on the alpha, b/c its
 383          * used to program the agp master not the cpu
 384          */
 385         pci_read_config_dword(agp_bridge->dev, AGP_APBASE, &temp);
 386         addr = (temp & PCI_BASE_ADDRESS_MEM_MASK);
 387         agp_bridge->gart_bus_addr = addr;
 388
 389         /* Calculate the agp offset */
 390         for (i = 0; i < value->num_entries / 1024; i++, addr += 0x00400000) {
 391                 writel(virt_to_gart(ati_generic_private.gatt_pages[i]->real) | 1,
 392                         page_dir.remapped+GET_PAGE_DIR_OFF(addr));
 393                 readl(page_dir.remapped+GET_PAGE_DIR_OFF(addr));        /* PCI Posting. */
 394         }
 395
 396         return 0;
 397 }
 398
 399 static int ati_free_gatt_table(struct agp_bridge_data *bridge)
 400 {
 401         struct ati_page_map page_dir;
 402
 403         page_dir.real = (unsigned long *)agp_bridge->gatt_table_real;
 404         page_dir.remapped = (unsigned long __iomem *)agp_bridge->gatt_table;
 405
 406         ati_free_gatt_pages();
 407         ati_free_page_map(&page_dir);
 408         return 0;
 409 }
 410
 411 static const struct agp_bridge_driver ati_generic_bridge = {
 412         .owner                  = THIS_MODULE,
 413         .aperture_sizes         = ati_generic_sizes,
 414         .size_type              = LVL2_APER_SIZE,
 415         .num_aperture_sizes     = 7,
 416         .configure              = ati_configure,
 417         .fetch_size             = ati_fetch_size,
 418         .cleanup                = ati_cleanup,
 419         .tlb_flush              = ati_tlbflush,
 420         .mask_memory            = agp_generic_mask_memory,
 421         .masks                  = ati_generic_masks,
 422         .agp_enable             = agp_generic_enable,
 423         .cache_flush            = global_cache_flush,
 424         .create_gatt_table      = ati_create_gatt_table,
 425         .free_gatt_table        = ati_free_gatt_table,
 426         .insert_memory          = ati_insert_memory,
 427         .remove_memory          = ati_remove_memory,
 428         .alloc_by_type          = agp_generic_alloc_by_type,
 429         .free_by_type           = agp_generic_free_by_type,
 430         .agp_alloc_page         = agp_generic_alloc_page,
 431         .agp_destroy_page       = agp_generic_destroy_page,
 432         .agp_type_to_mask_type  = agp_generic_type_to_mask_type,
 433 };
 434
 435
 436 static struct agp_device_ids ati_agp_device_ids[] __devinitdata =
 437 {
 438         {
 439                 .device_id      = PCI_DEVICE_ID_ATI_RS100,
 440                 .chipset_name   = "IGP320/M",
 441         },
 442         {
 443                 .device_id      = PCI_DEVICE_ID_ATI_RS200,
 444                 .chipset_name   = "IGP330/340/345/350/M",
 445         },
 446         {
 447                 .device_id      = PCI_DEVICE_ID_ATI_RS200_B,
 448                 .chipset_name   = "IGP345M",
 449         },
 450         {
 451                 .device_id      = PCI_DEVICE_ID_ATI_RS250,
 452                 .chipset_name   = "IGP7000/M",
 453         },
 454         {
 455                 .device_id      = PCI_DEVICE_ID_ATI_RS300_100,
 456                 .chipset_name   = "IGP9100/M",
 457         },
 458         {
 459                 .device_id      = PCI_DEVICE_ID_ATI_RS300_133,
 460                 .chipset_name   = "IGP9100/M",
 461         },
 462         {
 463                 .device_id      = PCI_DEVICE_ID_ATI_RS300_166,
 464                 .chipset_name   = "IGP9100/M",
 465         },
 466         {
 467                 .device_id      = PCI_DEVICE_ID_ATI_RS300_200,
 468                 .chipset_name   = "IGP9100/M",
 469         },
 470         {
 471                 .device_id      = PCI_DEVICE_ID_ATI_RS350_200,
 472                 .chipset_name   = "IGP9100/M",
 473         },
 474         { }, /* dummy final entry, always present */
 475 };
 476
 477 static int __devinit agp_ati_probe(struct pci_dev *pdev,
 478                                    const struct pci_device_id *ent)
 479 {
 480         struct agp_device_ids *devs = ati_agp_device_ids;
 481         struct agp_bridge_data *bridge;
 482         u8 cap_ptr;
 483         int j;
 484
 485         cap_ptr = pci_find_capability(pdev, PCI_CAP_ID_AGP);
 486         if (!cap_ptr)
 487                 return -ENODEV;
 488
 489         /* probe for known chipsets */
 490         for (j = 0; devs[j].chipset_name; j++) {
 491                 if (pdev->device == devs[j].device_id)
 492                         goto found;
 493         }
 494
 495         printk(KERN_ERR PFX
 496              "Unsupported Ati chipset (device id: %04x)\n", pdev->device);
 497         return -ENODEV;
 498
 499 found:
 500         bridge = agp_alloc_bridge();
 501         if (!bridge)
 502                 return -ENOMEM;
 503
 504         bridge->dev = pdev;
 505         bridge->capndx = cap_ptr;
 506
 507         bridge->driver = &ati_generic_bridge;
 508
 509         printk(KERN_INFO PFX "Detected Ati %s chipset\n",
 510                         devs[j].chipset_name);
 511
 512         /* Fill in the mode register */
 513         pci_read_config_dword(pdev,
 514                         bridge->capndx+PCI_AGP_STATUS,
 515                         &bridge->mode);
 516
 517         pci_set_drvdata(pdev, bridge);
 518         return agp_add_bridge(bridge);
 519 }
 520
 521 static void __devexit agp_ati_remove(struct pci_dev *pdev)
 522 {
 523         struct agp_bridge_data *bridge = pci_get_drvdata(pdev);
 524
 525         agp_remove_bridge(bridge);
 526         agp_put_bridge(bridge);
 527 }
 528
 529 static struct pci_device_id agp_ati_pci_table[] = {
 530         {
 531         .class          = (PCI_CLASS_BRIDGE_HOST << 8),
 532         .class_mask     = ~0,
 533         .vendor         = PCI_VENDOR_ID_ATI,
 534         .device         = PCI_ANY_ID,
 535         .subvendor      = PCI_ANY_ID,
 536         .subdevice      = PCI_ANY_ID,
 537         },
 538         { }
 539 };
 540
 541 MODULE_DEVICE_TABLE(pci, agp_ati_pci_table);
 542
 543 static struct pci_driver agp_ati_pci_driver = {
 544         .name           = "agpgart-ati",
 545         .id_table       = agp_ati_pci_table,
 546         .probe          = agp_ati_probe,
 547         .remove         = agp_ati_remove,
 548 #ifdef CONFIG_PM
 549         .suspend        = agp_ati_suspend,
 550         .resume         = agp_ati_resume,
 551 #endif
 552 };
 553
 554 static int __init agp_ati_init(void)
 555 {
 556         if (agp_off)
 557                 return -EINVAL;
 558         return pci_register_driver(&agp_ati_pci_driver);
 559 }
 560
 561 static void __exit agp_ati_cleanup(void)
 562 {
 563         pci_unregister_driver(&agp_ati_pci_driver);
 564 }
 565
 566 module_init(agp_ati_init);
 567 module_exit(agp_ati_cleanup);
 568
 569 MODULE_AUTHOR("Dave Jones <davej@codemonkey.org.uk>");
 570 MODULE_LICENSE("GPL and additional rights");
 571