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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         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
 273         num_entries = A_SIZE_LVL2(agp_bridge->current_size)->num_entries;
 274
 275         if (type != 0 || mem->type != 0)
 276                 return -EINVAL;
 277
 278         if ((pg_start + mem->page_count) > num_entries)
 279                 return -EINVAL;
 280
 281         j = pg_start;
 282         while (j < (pg_start + mem->page_count)) {
 283                 addr = (j * PAGE_SIZE) + agp_bridge->gart_bus_addr;
 284                 cur_gatt = GET_GATT(addr);
 285                 if (!PGE_EMPTY(agp_bridge,readl(cur_gatt+GET_GATT_OFF(addr))))
 286                         return -EBUSY;
 287                 j++;
 288         }
 289
 290         if (!mem->is_flushed) {
 291                 /*CACHE_FLUSH(); */
 292                 global_cache_flush();
 293                 mem->is_flushed = true;
 294         }
 295
 296         for (i = 0, j = pg_start; i < mem->page_count; i++, j++) {
 297                 addr = (j * PAGE_SIZE) + agp_bridge->gart_bus_addr;
 298                 cur_gatt = GET_GATT(addr);
 299                 writel(agp_bridge->driver->mask_memory(agp_bridge,
 300                         mem->memory[i], mem->type), cur_gatt+GET_GATT_OFF(addr));
 301                 readl(cur_gatt+GET_GATT_OFF(addr));     /* PCI Posting. */
 302         }
 303         agp_bridge->driver->tlb_flush(mem);
 304         return 0;
 305 }
 306
 307 static int ati_remove_memory(struct agp_memory * mem, off_t pg_start,
 308                              int type)
 309 {
 310         int i;
 311         unsigned long __iomem *cur_gatt;
 312         unsigned long addr;
 313
 314         if (type != 0 || mem->type != 0)
 315                 return -EINVAL;
 316
 317         for (i = pg_start; i < (mem->page_count + pg_start); i++) {
 318                 addr = (i * PAGE_SIZE) + agp_bridge->gart_bus_addr;
 319                 cur_gatt = GET_GATT(addr);
 320                 writel(agp_bridge->scratch_page, cur_gatt+GET_GATT_OFF(addr));
 321                 readl(cur_gatt+GET_GATT_OFF(addr)); /* PCI Posting. */
 322         }
 323
 324         agp_bridge->driver->tlb_flush(mem);
 325         return 0;
 326 }
 327
 328 static int ati_create_gatt_table(struct agp_bridge_data *bridge)
 329 {
 330         struct aper_size_info_lvl2 *value;
 331         struct ati_page_map page_dir;
 332         unsigned long addr;
 333         int retval;
 334         u32 temp;
 335         int i;
 336         struct aper_size_info_lvl2 *current_size;
 337
 338         value = A_SIZE_LVL2(agp_bridge->current_size);
 339         retval = ati_create_page_map(&page_dir);
 340         if (retval != 0)
 341                 return retval;
 342
 343         retval = ati_create_gatt_pages(value->num_entries / 1024);
 344         if (retval != 0) {
 345                 ati_free_page_map(&page_dir);
 346                 return retval;
 347         }
 348
 349         agp_bridge->gatt_table_real = (u32 *)page_dir.real;
 350         agp_bridge->gatt_table = (u32 __iomem *) page_dir.remapped;
 351         agp_bridge->gatt_bus_addr = virt_to_gart(page_dir.real);
 352
 353         /* Write out the size register */
 354         current_size = A_SIZE_LVL2(agp_bridge->current_size);
 355
 356         if (is_r200()) {
 357                 pci_read_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, &temp);
 358                 temp = (((temp & ~(0x0000000e)) | current_size->size_value)
 359                         | 0x00000001);
 360                 pci_write_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, temp);
 361                 pci_read_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, &temp);
 362         } else {
 363                 pci_read_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, &temp);
 364                 temp = (((temp & ~(0x0000000e)) | current_size->size_value)
 365                         | 0x00000001);
 366                 pci_write_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, temp);
 367                 pci_read_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, &temp);
 368         }
 369
 370         /*
 371          * Get the address for the gart region.
 372          * This is a bus address even on the alpha, b/c its
 373          * used to program the agp master not the cpu
 374          */
 375         pci_read_config_dword(agp_bridge->dev, AGP_APBASE, &temp);
 376         addr = (temp & PCI_BASE_ADDRESS_MEM_MASK);
 377         agp_bridge->gart_bus_addr = addr;
 378
 379         /* Calculate the agp offset */
 380         for (i = 0; i < value->num_entries / 1024; i++, addr += 0x00400000) {
 381                 writel(virt_to_gart(ati_generic_private.gatt_pages[i]->real) | 1,
 382                         page_dir.remapped+GET_PAGE_DIR_OFF(addr));
 383                 readl(page_dir.remapped+GET_PAGE_DIR_OFF(addr));        /* PCI Posting. */
 384         }
 385
 386         return 0;
 387 }
 388
 389 static int ati_free_gatt_table(struct agp_bridge_data *bridge)
 390 {
 391         struct ati_page_map page_dir;
 392
 393         page_dir.real = (unsigned long *)agp_bridge->gatt_table_real;
 394         page_dir.remapped = (unsigned long __iomem *)agp_bridge->gatt_table;
 395
 396         ati_free_gatt_pages();
 397         ati_free_page_map(&page_dir);
 398         return 0;
 399 }
 400
 401 static const struct agp_bridge_driver ati_generic_bridge = {
 402         .owner                  = THIS_MODULE,
 403         .aperture_sizes         = ati_generic_sizes,
 404         .size_type              = LVL2_APER_SIZE,
 405         .num_aperture_sizes     = 7,
 406         .configure              = ati_configure,
 407         .fetch_size             = ati_fetch_size,
 408         .cleanup                = ati_cleanup,
 409         .tlb_flush              = ati_tlbflush,
 410         .mask_memory            = agp_generic_mask_memory,
 411         .masks                  = ati_generic_masks,
 412         .agp_enable             = agp_generic_enable,
 413         .cache_flush            = global_cache_flush,
 414         .create_gatt_table      = ati_create_gatt_table,
 415         .free_gatt_table        = ati_free_gatt_table,
 416         .insert_memory          = ati_insert_memory,
 417         .remove_memory          = ati_remove_memory,
 418         .alloc_by_type          = agp_generic_alloc_by_type,
 419         .free_by_type           = agp_generic_free_by_type,
 420         .agp_alloc_page         = agp_generic_alloc_page,
 421         .agp_alloc_pages        = agp_generic_alloc_pages,
 422         .agp_destroy_page       = agp_generic_destroy_page,
 423         .agp_destroy_pages      = agp_generic_destroy_pages,
 424         .agp_type_to_mask_type  = agp_generic_type_to_mask_type,
 425 };
 426
 427
 428 static struct agp_device_ids ati_agp_device_ids[] __devinitdata =
 429 {
 430         {
 431                 .device_id      = PCI_DEVICE_ID_ATI_RS100,
 432                 .chipset_name   = "IGP320/M",
 433         },
 434         {
 435                 .device_id      = PCI_DEVICE_ID_ATI_RS200,
 436                 .chipset_name   = "IGP330/340/345/350/M",
 437         },
 438         {
 439                 .device_id      = PCI_DEVICE_ID_ATI_RS200_B,
 440                 .chipset_name   = "IGP345M",
 441         },
 442         {
 443                 .device_id      = PCI_DEVICE_ID_ATI_RS250,
 444                 .chipset_name   = "IGP7000/M",
 445         },
 446         {
 447                 .device_id      = PCI_DEVICE_ID_ATI_RS300_100,
 448                 .chipset_name   = "IGP9100/M",
 449         },
 450         {
 451                 .device_id      = PCI_DEVICE_ID_ATI_RS300_133,
 452                 .chipset_name   = "IGP9100/M",
 453         },
 454         {
 455                 .device_id      = PCI_DEVICE_ID_ATI_RS300_166,
 456                 .chipset_name   = "IGP9100/M",
 457         },
 458         {
 459                 .device_id      = PCI_DEVICE_ID_ATI_RS300_200,
 460                 .chipset_name   = "IGP9100/M",
 461         },
 462         {
 463                 .device_id      = PCI_DEVICE_ID_ATI_RS350_133,
 464                 .chipset_name   = "IGP9000/M",
 465         },
 466         {
 467                 .device_id      = PCI_DEVICE_ID_ATI_RS350_200,
 468                 .chipset_name   = "IGP9100/M",
 469         },
 470         { }, /* dummy final entry, always present */
 471 };
 472
 473 static int __devinit agp_ati_probe(struct pci_dev *pdev,
 474                                    const struct pci_device_id *ent)
 475 {
 476         struct agp_device_ids *devs = ati_agp_device_ids;
 477         struct agp_bridge_data *bridge;
 478         u8 cap_ptr;
 479         int j;
 480
 481         cap_ptr = pci_find_capability(pdev, PCI_CAP_ID_AGP);
 482         if (!cap_ptr)
 483                 return -ENODEV;
 484
 485         /* probe for known chipsets */
 486         for (j = 0; devs[j].chipset_name; j++) {
 487                 if (pdev->device == devs[j].device_id)
 488                         goto found;
 489         }
 490
 491         dev_err(&pdev->dev, "unsupported Ati chipset [%04x/%04x])\n",
 492                 pdev->vendor, pdev->device);
 493         return -ENODEV;
 494
 495 found:
 496         bridge = agp_alloc_bridge();
 497         if (!bridge)
 498                 return -ENOMEM;
 499
 500         bridge->dev = pdev;
 501         bridge->capndx = cap_ptr;
 502
 503         bridge->driver = &ati_generic_bridge;
 504
 505         dev_info(&pdev->dev, "Ati %s chipset\n", devs[j].chipset_name);
 506
 507         /* Fill in the mode register */
 508         pci_read_config_dword(pdev,
 509                         bridge->capndx+PCI_AGP_STATUS,
 510                         &bridge->mode);
 511
 512         pci_set_drvdata(pdev, bridge);
 513         return agp_add_bridge(bridge);
 514 }
 515
 516 static void __devexit agp_ati_remove(struct pci_dev *pdev)
 517 {
 518         struct agp_bridge_data *bridge = pci_get_drvdata(pdev);
 519
 520         agp_remove_bridge(bridge);
 521         agp_put_bridge(bridge);
 522 }
 523
 524 static struct pci_device_id agp_ati_pci_table[] = {
 525         {
 526         .class          = (PCI_CLASS_BRIDGE_HOST << 8),
 527         .class_mask     = ~0,
 528         .vendor         = PCI_VENDOR_ID_ATI,
 529         .device         = PCI_ANY_ID,
 530         .subvendor      = PCI_ANY_ID,
 531         .subdevice      = PCI_ANY_ID,
 532         },
 533         { }
 534 };
 535
 536 MODULE_DEVICE_TABLE(pci, agp_ati_pci_table);
 537
 538 static struct pci_driver agp_ati_pci_driver = {
 539         .name           = "agpgart-ati",
 540         .id_table       = agp_ati_pci_table,
 541         .probe          = agp_ati_probe,
 542         .remove         = agp_ati_remove,
 543 #ifdef CONFIG_PM
 544         .suspend        = agp_ati_suspend,
 545         .resume         = agp_ati_resume,
 546 #endif
 547 };
 548
 549 static int __init agp_ati_init(void)
 550 {
 551         if (agp_off)
 552                 return -EINVAL;
 553         return pci_register_driver(&agp_ati_pci_driver);
 554 }
 555
 556 static void __exit agp_ati_cleanup(void)
 557 {
 558         pci_unregister_driver(&agp_ati_pci_driver);
 559 }
 560
 561 module_init(agp_ati_init);
 562 module_exit(agp_ati_cleanup);
 563
 564 MODULE_AUTHOR("Dave Jones <davej@redhat.com>");
 565 MODULE_LICENSE("GPL and additional rights");
 566