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   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 (is_r200())
 217                 pci_write_config_dword(agp_bridge->dev, ATI_RS100_IG_AGPMODE, 0x20000);
 218         else
 219                 pci_write_config_dword(agp_bridge->dev, ATI_RS300_IG_AGPMODE, 0x20000);
 220
 221         /* address to map too */
 222         /*
 223         pci_read_config_dword(agp_bridge.dev, AGP_APBASE, &temp);
 224         agp_bridge.gart_bus_addr = (temp & PCI_BASE_ADDRESS_MEM_MASK);
 225         printk(KERN_INFO PFX "IGP320 gart_bus_addr: %x\n", agp_bridge.gart_bus_addr);
 226         */
 227         writel(0x60000, ati_generic_private.registers+ATI_GART_FEATURE_ID);
 228         readl(ati_generic_private.registers+ATI_GART_FEATURE_ID);       /* PCI Posting.*/
 229
 230         /* SIGNALED_SYSTEM_ERROR @ NB_STATUS */
 231         pci_read_config_dword(agp_bridge->dev, 4, &temp);
 232         pci_write_config_dword(agp_bridge->dev, 4, temp | (1<<14));
 233
 234         /* Write out the address of the gatt table */
 235         writel(agp_bridge->gatt_bus_addr, ati_generic_private.registers+ATI_GART_BASE);
 236         readl(ati_generic_private.registers+ATI_GART_BASE);     /* PCI Posting. */
 237
 238         return 0;
 239 }
 240
 241
 242 #ifdef CONFIG_PM
 243 static int agp_ati_suspend(struct pci_dev *dev, pm_message_t state)
 244 {
 245         pci_save_state(dev);
 246         pci_set_power_state(dev, 3);
 247
 248         return 0;
 249 }
 250
 251 static int agp_ati_resume(struct pci_dev *dev)
 252 {
 253         pci_set_power_state(dev, 0);
 254         pci_restore_state(dev);
 255
 256         return ati_configure();
 257 }
 258 #endif
 259
 260 /*
 261  *Since we don't need contiguous memory we just try
 262  * to get the gatt table once
 263  */
 264
 265 #define GET_PAGE_DIR_OFF(addr) (addr >> 22)
 266 #define GET_PAGE_DIR_IDX(addr) (GET_PAGE_DIR_OFF(addr) - \
 267         GET_PAGE_DIR_OFF(agp_bridge->gart_bus_addr))
 268 #define GET_GATT_OFF(addr) ((addr & 0x003ff000) >> 12)
 269 #undef  GET_GATT
 270 #define GET_GATT(addr) (ati_generic_private.gatt_pages[\
 271         GET_PAGE_DIR_IDX(addr)]->remapped)
 272
 273 static int ati_insert_memory(struct agp_memory * mem,
 274                              off_t pg_start, int type)
 275 {
 276         int i, j, num_entries;
 277         unsigned long __iomem *cur_gatt;
 278         unsigned long addr;
 279
 280         num_entries = A_SIZE_LVL2(agp_bridge->current_size)->num_entries;
 281
 282         if (type != 0 || mem->type != 0)
 283                 return -EINVAL;
 284
 285         if ((pg_start + mem->page_count) > num_entries)
 286                 return -EINVAL;
 287
 288         j = pg_start;
 289         while (j < (pg_start + mem->page_count)) {
 290                 addr = (j * PAGE_SIZE) + agp_bridge->gart_bus_addr;
 291                 cur_gatt = GET_GATT(addr);
 292                 if (!PGE_EMPTY(agp_bridge,readl(cur_gatt+GET_GATT_OFF(addr))))
 293                         return -EBUSY;
 294                 j++;
 295         }
 296
 297         if (mem->is_flushed == FALSE) {
 298                 /*CACHE_FLUSH(); */
 299                 global_cache_flush();
 300                 mem->is_flushed = TRUE;
 301         }
 302
 303         for (i = 0, j = pg_start; i < mem->page_count; i++, j++) {
 304                 addr = (j * PAGE_SIZE) + agp_bridge->gart_bus_addr;
 305                 cur_gatt = GET_GATT(addr);
 306                 writel(agp_bridge->driver->mask_memory(agp_bridge,
 307                         mem->memory[i], mem->type), cur_gatt+GET_GATT_OFF(addr));
 308                 readl(cur_gatt+GET_GATT_OFF(addr));     /* PCI Posting. */
 309         }
 310         agp_bridge->driver->tlb_flush(mem);
 311         return 0;
 312 }
 313
 314 static int ati_remove_memory(struct agp_memory * mem, off_t pg_start,
 315                              int type)
 316 {
 317         int i;
 318         unsigned long __iomem *cur_gatt;
 319         unsigned long addr;
 320
 321         if (type != 0 || mem->type != 0)
 322                 return -EINVAL;
 323
 324         for (i = pg_start; i < (mem->page_count + pg_start); i++) {
 325                 addr = (i * PAGE_SIZE) + agp_bridge->gart_bus_addr;
 326                 cur_gatt = GET_GATT(addr);
 327                 writel(agp_bridge->scratch_page, cur_gatt+GET_GATT_OFF(addr));
 328                 readl(cur_gatt+GET_GATT_OFF(addr)); /* PCI Posting. */
 329         }
 330
 331         agp_bridge->driver->tlb_flush(mem);
 332         return 0;
 333 }
 334
 335 static int ati_create_gatt_table(struct agp_bridge_data *bridge)
 336 {
 337         struct aper_size_info_lvl2 *value;
 338         struct ati_page_map page_dir;
 339         unsigned long addr;
 340         int retval;
 341         u32 temp;
 342         int i;
 343         struct aper_size_info_lvl2 *current_size;
 344
 345         value = A_SIZE_LVL2(agp_bridge->current_size);
 346         retval = ati_create_page_map(&page_dir);
 347         if (retval != 0)
 348                 return retval;
 349
 350         retval = ati_create_gatt_pages(value->num_entries / 1024);
 351         if (retval != 0) {
 352                 ati_free_page_map(&page_dir);
 353                 return retval;
 354         }
 355
 356         agp_bridge->gatt_table_real = (u32 *)page_dir.real;
 357         agp_bridge->gatt_table = (u32 __iomem *) page_dir.remapped;
 358         agp_bridge->gatt_bus_addr = virt_to_gart(page_dir.real);
 359
 360         /* Write out the size register */
 361         current_size = A_SIZE_LVL2(agp_bridge->current_size);
 362
 363         if (is_r200()) {
 364                 pci_read_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, &temp);
 365                 temp = (((temp & ~(0x0000000e)) | current_size->size_value)
 366                         | 0x00000001);
 367                 pci_write_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, temp);
 368                 pci_read_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, &temp);
 369         } else {
 370                 pci_read_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, &temp);
 371                 temp = (((temp & ~(0x0000000e)) | current_size->size_value)
 372                         | 0x00000001);
 373                 pci_write_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, temp);
 374                 pci_read_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, &temp);
 375         }
 376
 377         /*
 378          * Get the address for the gart region.
 379          * This is a bus address even on the alpha, b/c its
 380          * used to program the agp master not the cpu
 381          */
 382         pci_read_config_dword(agp_bridge->dev, AGP_APBASE, &temp);
 383         addr = (temp & PCI_BASE_ADDRESS_MEM_MASK);
 384         agp_bridge->gart_bus_addr = addr;
 385
 386         /* Calculate the agp offset */
 387         for (i = 0; i < value->num_entries / 1024; i++, addr += 0x00400000) {
 388                 writel(virt_to_gart(ati_generic_private.gatt_pages[i]->real) | 1,
 389                         page_dir.remapped+GET_PAGE_DIR_OFF(addr));
 390                 readl(page_dir.remapped+GET_PAGE_DIR_OFF(addr));        /* PCI Posting. */
 391         }
 392
 393         return 0;
 394 }
 395
 396 static int ati_free_gatt_table(struct agp_bridge_data *bridge)
 397 {
 398         struct ati_page_map page_dir;
 399
 400         page_dir.real = (unsigned long *)agp_bridge->gatt_table_real;
 401         page_dir.remapped = (unsigned long __iomem *)agp_bridge->gatt_table;
 402
 403         ati_free_gatt_pages();
 404         ati_free_page_map(&page_dir);
 405         return 0;
 406 }
 407
 408 static const struct agp_bridge_driver ati_generic_bridge = {
 409         .owner                  = THIS_MODULE,
 410         .aperture_sizes         = ati_generic_sizes,
 411         .size_type              = LVL2_APER_SIZE,
 412         .num_aperture_sizes     = 7,
 413         .configure              = ati_configure,
 414         .fetch_size             = ati_fetch_size,
 415         .cleanup                = ati_cleanup,
 416         .tlb_flush              = ati_tlbflush,
 417         .mask_memory            = agp_generic_mask_memory,
 418         .masks                  = ati_generic_masks,
 419         .agp_enable             = agp_generic_enable,
 420         .cache_flush            = global_cache_flush,
 421         .create_gatt_table      = ati_create_gatt_table,
 422         .free_gatt_table        = ati_free_gatt_table,
 423         .insert_memory          = ati_insert_memory,
 424         .remove_memory          = ati_remove_memory,
 425         .alloc_by_type          = agp_generic_alloc_by_type,
 426         .free_by_type           = agp_generic_free_by_type,
 427         .agp_alloc_page         = agp_generic_alloc_page,
 428         .agp_destroy_page       = agp_generic_destroy_page,
 429         .agp_type_to_mask_type  = agp_generic_type_to_mask_type,
 430 };
 431
 432
 433 static struct agp_device_ids ati_agp_device_ids[] __devinitdata =
 434 {
 435         {
 436                 .device_id      = PCI_DEVICE_ID_ATI_RS100,
 437                 .chipset_name   = "IGP320/M",
 438         },
 439         {
 440                 .device_id      = PCI_DEVICE_ID_ATI_RS200,
 441                 .chipset_name   = "IGP330/340/345/350/M",
 442         },
 443         {
 444                 .device_id      = PCI_DEVICE_ID_ATI_RS200_B,
 445                 .chipset_name   = "IGP345M",
 446         },
 447         {
 448                 .device_id      = PCI_DEVICE_ID_ATI_RS250,
 449                 .chipset_name   = "IGP7000/M",
 450         },
 451         {
 452                 .device_id      = PCI_DEVICE_ID_ATI_RS300_100,
 453                 .chipset_name   = "IGP9100/M",
 454         },
 455         {
 456                 .device_id      = PCI_DEVICE_ID_ATI_RS300_133,
 457                 .chipset_name   = "IGP9100/M",
 458         },
 459         {
 460                 .device_id      = PCI_DEVICE_ID_ATI_RS300_166,
 461                 .chipset_name   = "IGP9100/M",
 462         },
 463         {
 464                 .device_id      = PCI_DEVICE_ID_ATI_RS300_200,
 465                 .chipset_name   = "IGP9100/M",
 466         },
 467         {
 468                 .device_id      = PCI_DEVICE_ID_ATI_RS350_200,
 469                 .chipset_name   = "IGP9100/M",
 470         },
 471         { }, /* dummy final entry, always present */
 472 };
 473
 474 static int __devinit agp_ati_probe(struct pci_dev *pdev,
 475                                    const struct pci_device_id *ent)
 476 {
 477         struct agp_device_ids *devs = ati_agp_device_ids;
 478         struct agp_bridge_data *bridge;
 479         u8 cap_ptr;
 480         int j;
 481
 482         cap_ptr = pci_find_capability(pdev, PCI_CAP_ID_AGP);
 483         if (!cap_ptr)
 484                 return -ENODEV;
 485
 486         /* probe for known chipsets */
 487         for (j = 0; devs[j].chipset_name; j++) {
 488                 if (pdev->device == devs[j].device_id)
 489                         goto found;
 490         }
 491
 492         printk(KERN_ERR PFX
 493              "Unsupported Ati chipset (device id: %04x)\n", pdev->device);
 494         return -ENODEV;
 495
 496 found:
 497         bridge = agp_alloc_bridge();
 498         if (!bridge)
 499                 return -ENOMEM;
 500
 501         bridge->dev = pdev;
 502         bridge->capndx = cap_ptr;
 503
 504         bridge->driver = &ati_generic_bridge;
 505
 506         printk(KERN_INFO PFX "Detected Ati %s chipset\n",
 507                         devs[j].chipset_name);
 508
 509         /* Fill in the mode register */
 510         pci_read_config_dword(pdev,
 511                         bridge->capndx+PCI_AGP_STATUS,
 512                         &bridge->mode);
 513
 514         pci_set_drvdata(pdev, bridge);
 515         return agp_add_bridge(bridge);
 516 }
 517
 518 static void __devexit agp_ati_remove(struct pci_dev *pdev)
 519 {
 520         struct agp_bridge_data *bridge = pci_get_drvdata(pdev);
 521
 522         agp_remove_bridge(bridge);
 523         agp_put_bridge(bridge);
 524 }
 525
 526 static struct pci_device_id agp_ati_pci_table[] = {
 527         {
 528         .class          = (PCI_CLASS_BRIDGE_HOST << 8),
 529         .class_mask     = ~0,
 530         .vendor         = PCI_VENDOR_ID_ATI,
 531         .device         = PCI_ANY_ID,
 532         .subvendor      = PCI_ANY_ID,
 533         .subdevice      = PCI_ANY_ID,
 534         },
 535         { }
 536 };
 537
 538 MODULE_DEVICE_TABLE(pci, agp_ati_pci_table);
 539
 540 static struct pci_driver agp_ati_pci_driver = {
 541         .name           = "agpgart-ati",
 542         .id_table       = agp_ati_pci_table,
 543         .probe          = agp_ati_probe,
 544         .remove         = agp_ati_remove,
 545 #ifdef CONFIG_PM
 546         .suspend        = agp_ati_suspend,
 547         .resume         = agp_ati_resume,
 548 #endif
 549 };
 550
 551 static int __init agp_ati_init(void)
 552 {
 553         if (agp_off)
 554                 return -EINVAL;
 555         return pci_register_driver(&agp_ati_pci_driver);
 556 }
 557
 558 static void __exit agp_ati_cleanup(void)
 559 {
 560         pci_unregister_driver(&agp_ati_pci_driver);
 561 }
 562
 563 module_init(agp_ati_init);
 564 module_exit(agp_ati_cleanup);
 565
 566 MODULE_AUTHOR("Dave Jones <davej@codemonkey.org.uk>");
 567 MODULE_LICENSE("GPL and additional rights");
 568