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         set_memory_uc((unsigned long)page_map->real, 1);
  64         err = map_page_into_agp(virt_to_page(page_map->real));
  65         page_map->remapped = page_map->real;
  66
  67         for (i = 0; i < PAGE_SIZE / sizeof(unsigned long); i++) {
  68                 writel(agp_bridge->scratch_page, page_map->remapped+i);
  69                 readl(page_map->remapped+i);    /* PCI Posting. */
  70         }
  71
  72         return 0;
  73 }
  74
  75
  76 static void ati_free_page_map(struct ati_page_map *page_map)
  77 {
  78         unmap_page_from_agp(virt_to_page(page_map->real));
  79         set_memory_wb((unsigned long)page_map->real, 1);
  80         free_page((unsigned long) page_map->real);
  81 }
  82
  83
  84 static void ati_free_gatt_pages(void)
  85 {
  86         int i;
  87         struct ati_page_map **tables;
  88         struct ati_page_map *entry;
  89
  90         tables = ati_generic_private.gatt_pages;
  91         for (i = 0; i < ati_generic_private.num_tables; i++) {
  92                 entry = tables[i];
  93                 if (entry != NULL) {
  94                         if (entry->real != NULL)
  95                                 ati_free_page_map(entry);
  96                         kfree(entry);
  97                 }
  98         }
  99         kfree(tables);
 100 }
 101
 102
 103 static int ati_create_gatt_pages(int nr_tables)
 104 {
 105         struct ati_page_map **tables;
 106         struct ati_page_map *entry;
 107         int retval = 0;
 108         int i;
 109
 110         tables = kzalloc((nr_tables + 1) * sizeof(struct ati_page_map *),GFP_KERNEL);
 111         if (tables == NULL)
 112                 return -ENOMEM;
 113
 114         for (i = 0; i < nr_tables; i++) {
 115                 entry = kzalloc(sizeof(struct ati_page_map), GFP_KERNEL);
 116                 tables[i] = entry;
 117                 if (entry == NULL) {
 118                         retval = -ENOMEM;
 119                         break;
 120                 }
 121                 retval = ati_create_page_map(entry);
 122                 if (retval != 0)
 123                         break;
 124         }
 125         ati_generic_private.num_tables = i;
 126         ati_generic_private.gatt_pages = tables;
 127
 128         if (retval != 0)
 129                 ati_free_gatt_pages();
 130
 131         return retval;
 132 }
 133
 134 static int is_r200(void)
 135 {
 136         if ((agp_bridge->dev->device == PCI_DEVICE_ID_ATI_RS100) ||
 137             (agp_bridge->dev->device == PCI_DEVICE_ID_ATI_RS200) ||
 138             (agp_bridge->dev->device == PCI_DEVICE_ID_ATI_RS200_B) ||
 139             (agp_bridge->dev->device == PCI_DEVICE_ID_ATI_RS250))
 140                 return 1;
 141         return 0;
 142 }
 143
 144 static int ati_fetch_size(void)
 145 {
 146         int i;
 147         u32 temp;
 148         struct aper_size_info_lvl2 *values;
 149
 150         if (is_r200())
 151                 pci_read_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, &temp);
 152         else
 153                 pci_read_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, &temp);
 154
 155         temp = (temp & 0x0000000e);
 156         values = A_SIZE_LVL2(agp_bridge->driver->aperture_sizes);
 157         for (i = 0; i < agp_bridge->driver->num_aperture_sizes; i++) {
 158                 if (temp == values[i].size_value) {
 159                         agp_bridge->previous_size =
 160                             agp_bridge->current_size = (void *) (values + i);
 161
 162                         agp_bridge->aperture_size_idx = i;
 163                         return values[i].size;
 164                 }
 165         }
 166
 167         return 0;
 168 }
 169
 170 static void ati_tlbflush(struct agp_memory * mem)
 171 {
 172         writel(1, ati_generic_private.registers+ATI_GART_CACHE_CNTRL);
 173         readl(ati_generic_private.registers+ATI_GART_CACHE_CNTRL);      /* PCI Posting. */
 174 }
 175
 176 static void ati_cleanup(void)
 177 {
 178         struct aper_size_info_lvl2 *previous_size;
 179         u32 temp;
 180
 181         previous_size = A_SIZE_LVL2(agp_bridge->previous_size);
 182
 183         /* Write back the previous size and disable gart translation */
 184         if (is_r200()) {
 185                 pci_read_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, &temp);
 186                 temp = ((temp & ~(0x0000000f)) | previous_size->size_value);
 187                 pci_write_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, temp);
 188         } else {
 189                 pci_read_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, &temp);
 190                 temp = ((temp & ~(0x0000000f)) | previous_size->size_value);
 191                 pci_write_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, temp);
 192         }
 193         iounmap((volatile u8 __iomem *)ati_generic_private.registers);
 194 }
 195
 196
 197 static int ati_configure(void)
 198 {
 199         u32 temp;
 200
 201         /* Get the memory mapped registers */
 202         pci_read_config_dword(agp_bridge->dev, ATI_GART_MMBASE_ADDR, &temp);
 203         temp = (temp & 0xfffff000);
 204         ati_generic_private.registers = (volatile u8 __iomem *) ioremap(temp, 4096);
 205
 206         if (!ati_generic_private.registers)
 207                 return -ENOMEM;
 208
 209         if (is_r200())
 210                 pci_write_config_dword(agp_bridge->dev, ATI_RS100_IG_AGPMODE, 0x20000);
 211         else
 212                 pci_write_config_dword(agp_bridge->dev, ATI_RS300_IG_AGPMODE, 0x20000);
 213
 214         /* address to map too */
 215         /*
 216         pci_read_config_dword(agp_bridge.dev, AGP_APBASE, &temp);
 217         agp_bridge.gart_bus_addr = (temp & PCI_BASE_ADDRESS_MEM_MASK);
 218         printk(KERN_INFO PFX "IGP320 gart_bus_addr: %x\n", agp_bridge.gart_bus_addr);
 219         */
 220         writel(0x60000, ati_generic_private.registers+ATI_GART_FEATURE_ID);
 221         readl(ati_generic_private.registers+ATI_GART_FEATURE_ID);       /* PCI Posting.*/
 222
 223         /* SIGNALED_SYSTEM_ERROR @ NB_STATUS */
 224         pci_read_config_dword(agp_bridge->dev, 4, &temp);
 225         pci_write_config_dword(agp_bridge->dev, 4, temp | (1<<14));
 226
 227         /* Write out the address of the gatt table */
 228         writel(agp_bridge->gatt_bus_addr, ati_generic_private.registers+ATI_GART_BASE);
 229         readl(ati_generic_private.registers+ATI_GART_BASE);     /* PCI Posting. */
 230
 231         return 0;
 232 }
 233
 234
 235 #ifdef CONFIG_PM
 236 static int agp_ati_suspend(struct pci_dev *dev, pm_message_t state)
 237 {
 238         pci_save_state(dev);
 239         pci_set_power_state(dev, 3);
 240
 241         return 0;
 242 }
 243
 244 static int agp_ati_resume(struct pci_dev *dev)
 245 {
 246         pci_set_power_state(dev, 0);
 247         pci_restore_state(dev);
 248
 249         return ati_configure();
 250 }
 251 #endif
 252
 253 /*
 254  *Since we don't need contiguous memory we just try
 255  * to get the gatt table once
 256  */
 257
 258 #define GET_PAGE_DIR_OFF(addr) (addr >> 22)
 259 #define GET_PAGE_DIR_IDX(addr) (GET_PAGE_DIR_OFF(addr) - \
 260         GET_PAGE_DIR_OFF(agp_bridge->gart_bus_addr))
 261 #define GET_GATT_OFF(addr) ((addr & 0x003ff000) >> 12)
 262 #undef  GET_GATT
 263 #define GET_GATT(addr) (ati_generic_private.gatt_pages[\
 264         GET_PAGE_DIR_IDX(addr)]->remapped)
 265
 266 static int ati_insert_memory(struct agp_memory * mem,
 267                              off_t pg_start, int type)
 268 {
 269         int i, j, num_entries;
 270         unsigned long __iomem *cur_gatt;
 271         unsigned long addr;
 272         int mask_type;
 273
 274         num_entries = A_SIZE_LVL2(agp_bridge->current_size)->num_entries;
 275
 276         mask_type = agp_generic_type_to_mask_type(mem->bridge, type);
 277         if (mask_type != 0 || type != mem->type)
 278                 return -EINVAL;
 279
 280         if (mem->page_count == 0)
 281                 return 0;
 282
 283         if ((pg_start + mem->page_count) > num_entries)
 284                 return -EINVAL;
 285
 286         j = pg_start;
 287         while (j < (pg_start + mem->page_count)) {
 288                 addr = (j * PAGE_SIZE) + agp_bridge->gart_bus_addr;
 289                 cur_gatt = GET_GATT(addr);
 290                 if (!PGE_EMPTY(agp_bridge,readl(cur_gatt+GET_GATT_OFF(addr))))
 291                         return -EBUSY;
 292                 j++;
 293         }
 294
 295         if (!mem->is_flushed) {
 296                 /*CACHE_FLUSH(); */
 297                 global_cache_flush();
 298                 mem->is_flushed = true;
 299         }
 300
 301         for (i = 0, j = pg_start; i < mem->page_count; i++, j++) {
 302                 addr = (j * PAGE_SIZE) + agp_bridge->gart_bus_addr;
 303                 cur_gatt = GET_GATT(addr);
 304                 writel(agp_bridge->driver->mask_memory(agp_bridge,
 305                                                        mem->pages[i], mem->type),
 306                        cur_gatt+GET_GATT_OFF(addr));
 307         }
 308         readl(GET_GATT(agp_bridge->gart_bus_addr)); /* PCI posting */
 309         agp_bridge->driver->tlb_flush(mem);
 310         return 0;
 311 }
 312
 313 static int ati_remove_memory(struct agp_memory * mem, off_t pg_start,
 314                              int type)
 315 {
 316         int i;
 317         unsigned long __iomem *cur_gatt;
 318         unsigned long addr;
 319         int mask_type;
 320
 321         mask_type = agp_generic_type_to_mask_type(mem->bridge, type);
 322         if (mask_type != 0 || type != mem->type)
 323                 return -EINVAL;
 324
 325         if (mem->page_count == 0)
 326                 return 0;
 327
 328         for (i = pg_start; i < (mem->page_count + pg_start); i++) {
 329                 addr = (i * PAGE_SIZE) + agp_bridge->gart_bus_addr;
 330                 cur_gatt = GET_GATT(addr);
 331                 writel(agp_bridge->scratch_page, cur_gatt+GET_GATT_OFF(addr));
 332         }
 333
 334         readl(GET_GATT(agp_bridge->gart_bus_addr)); /* PCI posting */
 335         agp_bridge->driver->tlb_flush(mem);
 336         return 0;
 337 }
 338
 339 static int ati_create_gatt_table(struct agp_bridge_data *bridge)
 340 {
 341         struct aper_size_info_lvl2 *value;
 342         struct ati_page_map page_dir;
 343         unsigned long addr;
 344         int retval;
 345         u32 temp;
 346         int i;
 347         struct aper_size_info_lvl2 *current_size;
 348
 349         value = A_SIZE_LVL2(agp_bridge->current_size);
 350         retval = ati_create_page_map(&page_dir);
 351         if (retval != 0)
 352                 return retval;
 353
 354         retval = ati_create_gatt_pages(value->num_entries / 1024);
 355         if (retval != 0) {
 356                 ati_free_page_map(&page_dir);
 357                 return retval;
 358         }
 359
 360         agp_bridge->gatt_table_real = (u32 *)page_dir.real;
 361         agp_bridge->gatt_table = (u32 __iomem *) page_dir.remapped;
 362         agp_bridge->gatt_bus_addr = virt_to_gart(page_dir.real);
 363
 364         /* Write out the size register */
 365         current_size = A_SIZE_LVL2(agp_bridge->current_size);
 366
 367         if (is_r200()) {
 368                 pci_read_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, &temp);
 369                 temp = (((temp & ~(0x0000000e)) | current_size->size_value)
 370                         | 0x00000001);
 371                 pci_write_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, temp);
 372                 pci_read_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, &temp);
 373         } else {
 374                 pci_read_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, &temp);
 375                 temp = (((temp & ~(0x0000000e)) | current_size->size_value)
 376                         | 0x00000001);
 377                 pci_write_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, temp);
 378                 pci_read_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, &temp);
 379         }
 380
 381         /*
 382          * Get the address for the gart region.
 383          * This is a bus address even on the alpha, b/c its
 384          * used to program the agp master not the cpu
 385          */
 386         pci_read_config_dword(agp_bridge->dev, AGP_APBASE, &temp);
 387         addr = (temp & PCI_BASE_ADDRESS_MEM_MASK);
 388         agp_bridge->gart_bus_addr = addr;
 389
 390         /* Calculate the agp offset */
 391         for (i = 0; i < value->num_entries / 1024; i++, addr += 0x00400000) {
 392                 writel(virt_to_gart(ati_generic_private.gatt_pages[i]->real) | 1,
 393                         page_dir.remapped+GET_PAGE_DIR_OFF(addr));
 394                 readl(page_dir.remapped+GET_PAGE_DIR_OFF(addr));        /* PCI Posting. */
 395         }
 396
 397         return 0;
 398 }
 399
 400 static int ati_free_gatt_table(struct agp_bridge_data *bridge)
 401 {
 402         struct ati_page_map page_dir;
 403
 404         page_dir.real = (unsigned long *)agp_bridge->gatt_table_real;
 405         page_dir.remapped = (unsigned long __iomem *)agp_bridge->gatt_table;
 406
 407         ati_free_gatt_pages();
 408         ati_free_page_map(&page_dir);
 409         return 0;
 410 }
 411
 412 static const struct agp_bridge_driver ati_generic_bridge = {
 413         .owner                  = THIS_MODULE,
 414         .aperture_sizes         = ati_generic_sizes,
 415         .size_type              = LVL2_APER_SIZE,
 416         .num_aperture_sizes     = 7,
 417         .configure              = ati_configure,
 418         .fetch_size             = ati_fetch_size,
 419         .cleanup                = ati_cleanup,
 420         .tlb_flush              = ati_tlbflush,
 421         .mask_memory            = agp_generic_mask_memory,
 422         .masks                  = ati_generic_masks,
 423         .agp_enable             = agp_generic_enable,
 424         .cache_flush            = global_cache_flush,
 425         .create_gatt_table      = ati_create_gatt_table,
 426         .free_gatt_table        = ati_free_gatt_table,
 427         .insert_memory          = ati_insert_memory,
 428         .remove_memory          = ati_remove_memory,
 429         .alloc_by_type          = agp_generic_alloc_by_type,
 430         .free_by_type           = agp_generic_free_by_type,
 431         .agp_alloc_page         = agp_generic_alloc_page,
 432         .agp_alloc_pages        = agp_generic_alloc_pages,
 433         .agp_destroy_page       = agp_generic_destroy_page,
 434         .agp_destroy_pages      = agp_generic_destroy_pages,
 435         .agp_type_to_mask_type  = agp_generic_type_to_mask_type,
 436 };
 437
 438
 439 static struct agp_device_ids ati_agp_device_ids[] __devinitdata =
 440 {
 441         {
 442                 .device_id      = PCI_DEVICE_ID_ATI_RS100,
 443                 .chipset_name   = "IGP320/M",
 444         },
 445         {
 446                 .device_id      = PCI_DEVICE_ID_ATI_RS200,
 447                 .chipset_name   = "IGP330/340/345/350/M",
 448         },
 449         {
 450                 .device_id      = PCI_DEVICE_ID_ATI_RS200_B,
 451                 .chipset_name   = "IGP345M",
 452         },
 453         {
 454                 .device_id      = PCI_DEVICE_ID_ATI_RS250,
 455                 .chipset_name   = "IGP7000/M",
 456         },
 457         {
 458                 .device_id      = PCI_DEVICE_ID_ATI_RS300_100,
 459                 .chipset_name   = "IGP9100/M",
 460         },
 461         {
 462                 .device_id      = PCI_DEVICE_ID_ATI_RS300_133,
 463                 .chipset_name   = "IGP9100/M",
 464         },
 465         {
 466                 .device_id      = PCI_DEVICE_ID_ATI_RS300_166,
 467                 .chipset_name   = "IGP9100/M",
 468         },
 469         {
 470                 .device_id      = PCI_DEVICE_ID_ATI_RS300_200,
 471                 .chipset_name   = "IGP9100/M",
 472         },
 473         {
 474                 .device_id      = PCI_DEVICE_ID_ATI_RS350_133,
 475                 .chipset_name   = "IGP9000/M",
 476         },
 477         {
 478                 .device_id      = PCI_DEVICE_ID_ATI_RS350_200,
 479                 .chipset_name   = "IGP9100/M",
 480         },
 481         { }, /* dummy final entry, always present */
 482 };
 483
 484 static int __devinit agp_ati_probe(struct pci_dev *pdev,
 485                                    const struct pci_device_id *ent)
 486 {
 487         struct agp_device_ids *devs = ati_agp_device_ids;
 488         struct agp_bridge_data *bridge;
 489         u8 cap_ptr;
 490         int j;
 491
 492         cap_ptr = pci_find_capability(pdev, PCI_CAP_ID_AGP);
 493         if (!cap_ptr)
 494                 return -ENODEV;
 495
 496         /* probe for known chipsets */
 497         for (j = 0; devs[j].chipset_name; j++) {
 498                 if (pdev->device == devs[j].device_id)
 499                         goto found;
 500         }
 501
 502         dev_err(&pdev->dev, "unsupported Ati chipset [%04x/%04x])\n",
 503                 pdev->vendor, pdev->device);
 504         return -ENODEV;
 505
 506 found:
 507         bridge = agp_alloc_bridge();
 508         if (!bridge)
 509                 return -ENOMEM;
 510
 511         bridge->dev = pdev;
 512         bridge->capndx = cap_ptr;
 513
 514         bridge->driver = &ati_generic_bridge;
 515
 516         dev_info(&pdev->dev, "Ati %s chipset\n", devs[j].chipset_name);
 517
 518         /* Fill in the mode register */
 519         pci_read_config_dword(pdev,
 520                         bridge->capndx+PCI_AGP_STATUS,
 521                         &bridge->mode);
 522
 523         pci_set_drvdata(pdev, bridge);
 524         return agp_add_bridge(bridge);
 525 }
 526
 527 static void __devexit agp_ati_remove(struct pci_dev *pdev)
 528 {
 529         struct agp_bridge_data *bridge = pci_get_drvdata(pdev);
 530
 531         agp_remove_bridge(bridge);
 532         agp_put_bridge(bridge);
 533 }
 534
 535 static struct pci_device_id agp_ati_pci_table[] = {
 536         {
 537         .class          = (PCI_CLASS_BRIDGE_HOST << 8),
 538         .class_mask     = ~0,
 539         .vendor         = PCI_VENDOR_ID_ATI,
 540         .device         = PCI_ANY_ID,
 541         .subvendor      = PCI_ANY_ID,
 542         .subdevice      = PCI_ANY_ID,
 543         },
 544         { }
 545 };
 546
 547 MODULE_DEVICE_TABLE(pci, agp_ati_pci_table);
 548
 549 static struct pci_driver agp_ati_pci_driver = {
 550         .name           = "agpgart-ati",
 551         .id_table       = agp_ati_pci_table,
 552         .probe          = agp_ati_probe,
 553         .remove         = agp_ati_remove,
 554 #ifdef CONFIG_PM
 555         .suspend        = agp_ati_suspend,
 556         .resume         = agp_ati_resume,
 557 #endif
 558 };
 559
 560 static int __init agp_ati_init(void)
 561 {
 562         if (agp_off)
 563                 return -EINVAL;
 564         return pci_register_driver(&agp_ati_pci_driver);
 565 }
 566
 567 static void __exit agp_ati_cleanup(void)
 568 {
 569         pci_unregister_driver(&agp_ati_pci_driver);
 570 }
 571
 572 module_init(agp_ati_init);
 573 module_exit(agp_ati_cleanup);
 574
 575 MODULE_AUTHOR("Dave Jones <davej@redhat.com>");
 576 MODULE_LICENSE("GPL and additional rights");
 577