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/agp_backend.h>
  10 #include <asm/agp.h>
  11 #include "agp.h"
  12
  13 #define ATI_GART_MMBASE_ADDR    0x14
  14 #define ATI_RS100_APSIZE        0xac
  15 #define ATI_RS100_IG_AGPMODE    0xb0
  16 #define ATI_RS300_APSIZE        0xf8
  17 #define ATI_RS300_IG_AGPMODE    0xfc
  18 #define ATI_GART_FEATURE_ID             0x00
  19 #define ATI_GART_BASE                   0x04
  20 #define ATI_GART_CACHE_SZBASE           0x08
  21 #define ATI_GART_CACHE_CNTRL            0x0c
  22 #define ATI_GART_CACHE_ENTRY_CNTRL      0x10
  23
  24
  25 static struct aper_size_info_lvl2 ati_generic_sizes[7] =
  26 {
  27         {2048, 524288, 0x0000000c},
  28         {1024, 262144, 0x0000000a},
  29         {512, 131072, 0x00000008},
  30         {256, 65536, 0x00000006},
  31         {128, 32768, 0x00000004},
  32         {64, 16384, 0x00000002},
  33         {32, 8192, 0x00000000}
  34 };
  35
  36 static struct gatt_mask ati_generic_masks[] =
  37 {
  38         { .mask = 1, .type = 0}
  39 };
  40
  41
  42
  43 typedef struct _ati_page_map {
  44         unsigned long *real;
  45         unsigned long __iomem *remapped;
  46 } ati_page_map;
  47
  48 static struct _ati_generic_private {
  49         volatile u8 __iomem *registers;
  50         ati_page_map **gatt_pages;
  51         int num_tables;
  52 } ati_generic_private;
  53
  54 static int ati_create_page_map(ati_page_map *page_map)
  55 {
  56         int i, err = 0;
  57
  58         page_map->real = (unsigned long *) __get_free_page(GFP_KERNEL);
  59         if (page_map->real == NULL)
  60                 return -ENOMEM;
  61
  62         SetPageReserved(virt_to_page(page_map->real));
  63         err = map_page_into_agp(virt_to_page(page_map->real));
  64
  65         /* CACHE_FLUSH(); */
  66         global_cache_flush();
  67         page_map->remapped = ioremap_nocache(virt_to_phys(page_map->real),
  68                                             PAGE_SIZE);
  69         if (page_map->remapped == NULL || err) {
  70                 ClearPageReserved(virt_to_page(page_map->real));
  71                 free_page((unsigned long) page_map->real);
  72                 page_map->real = NULL;
  73                 return -ENOMEM;
  74         }
  75         /*CACHE_FLUSH();*/
  76         global_cache_flush();
  77
  78         for(i = 0; i < PAGE_SIZE / sizeof(unsigned long); i++)
  79                 writel(agp_bridge->scratch_page, page_map->remapped+i);
  80
  81         return 0;
  82 }
  83
  84
  85 static void ati_free_page_map(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         ati_page_map **tables;
  98         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         ati_page_map **tables;
 116         ati_page_map *entry;
 117         int retval = 0;
 118         int i;
 119
 120         tables = kmalloc((nr_tables + 1) * sizeof(ati_page_map *),
 121                          GFP_KERNEL);
 122         if (tables == NULL)
 123                 return -ENOMEM;
 124
 125         memset(tables, 0, sizeof(ati_page_map *) * (nr_tables + 1));
 126         for (i = 0; i < nr_tables; i++) {
 127                 entry = kmalloc(sizeof(ati_page_map), GFP_KERNEL);
 128                 if (entry == NULL) {
 129                         while (i>0) {
 130                                 kfree (tables[i-1]);
 131                                 i--;
 132                         }
 133                         kfree (tables);
 134                         tables = NULL;
 135                         retval = -ENOMEM;
 136                         break;
 137                 }
 138                 memset(entry, 0, sizeof(ati_page_map));
 139                 tables[i] = entry;
 140                 retval = ati_create_page_map(entry);
 141                 if (retval != 0) break;
 142         }
 143         ati_generic_private.num_tables = nr_tables;
 144         ati_generic_private.gatt_pages = tables;
 145
 146         if (retval != 0) ati_free_gatt_pages();
 147
 148         return retval;
 149 }
 150
 151 static int is_r200(void)
 152 {
 153         if ((agp_bridge->dev->device == PCI_DEVICE_ID_ATI_RS100) ||
 154             (agp_bridge->dev->device == PCI_DEVICE_ID_ATI_RS200) ||
 155             (agp_bridge->dev->device == PCI_DEVICE_ID_ATI_RS200_B) ||
 156             (agp_bridge->dev->device == PCI_DEVICE_ID_ATI_RS250))
 157                 return 1;
 158         return 0;
 159 }
 160
 161 static int ati_fetch_size(void)
 162 {
 163         int i;
 164         u32 temp;
 165         struct aper_size_info_lvl2 *values;
 166
 167         if (is_r200())
 168                 pci_read_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, &temp);
 169         else
 170                 pci_read_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, &temp);
 171
 172         temp = (temp & 0x0000000e);
 173         values = A_SIZE_LVL2(agp_bridge->driver->aperture_sizes);
 174         for (i = 0; i < agp_bridge->driver->num_aperture_sizes; i++) {
 175                 if (temp == values[i].size_value) {
 176                         agp_bridge->previous_size =
 177                             agp_bridge->current_size = (void *) (values + i);
 178
 179                         agp_bridge->aperture_size_idx = i;
 180                         return values[i].size;
 181                 }
 182         }
 183
 184         return 0;
 185 }
 186
 187 static void ati_tlbflush(struct agp_memory * mem)
 188 {
 189         OUTREG32(ati_generic_private.registers, ATI_GART_CACHE_CNTRL, 1);
 190 }
 191
 192 static void ati_cleanup(void)
 193 {
 194         struct aper_size_info_lvl2 *previous_size;
 195         u32 temp;
 196
 197         previous_size = A_SIZE_LVL2(agp_bridge->previous_size);
 198
 199         /* Write back the previous size and disable gart translation */
 200         if (is_r200()) {
 201                 pci_read_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, &temp);
 202                 temp = ((temp & ~(0x0000000f)) | previous_size->size_value);
 203                 pci_write_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, temp);
 204         } else {
 205                 pci_read_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, &temp);
 206                 temp = ((temp & ~(0x0000000f)) | previous_size->size_value);
 207                 pci_write_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, temp);
 208         }
 209         iounmap((volatile u8 __iomem *)ati_generic_private.registers);
 210 }
 211
 212
 213 static int ati_configure(void)
 214 {
 215         u32 temp;
 216
 217         /* Get the memory mapped registers */
 218         pci_read_config_dword(agp_bridge->dev, ATI_GART_MMBASE_ADDR, &temp);
 219         temp = (temp & 0xfffff000);
 220         ati_generic_private.registers = (volatile u8 __iomem *) ioremap(temp, 4096);
 221
 222         if (is_r200())
 223         pci_write_config_dword(agp_bridge->dev, ATI_RS100_IG_AGPMODE, 0x20000);
 224         else
 225                 pci_write_config_dword(agp_bridge->dev, ATI_RS300_IG_AGPMODE, 0x20000);
 226
 227         /* address to map too */
 228         /*
 229         pci_read_config_dword(agp_bridge.dev, AGP_APBASE, &temp);
 230         agp_bridge.gart_bus_addr = (temp & PCI_BASE_ADDRESS_MEM_MASK);
 231         printk(KERN_INFO PFX "IGP320 gart_bus_addr: %x\n", agp_bridge.gart_bus_addr);
 232         */
 233         OUTREG32(ati_generic_private.registers, ATI_GART_FEATURE_ID, 0x60000);
 234
 235         /* SIGNALED_SYSTEM_ERROR @ NB_STATUS */
 236         pci_read_config_dword(agp_bridge->dev, 4, &temp);
 237         pci_write_config_dword(agp_bridge->dev, 4, temp | (1<<14));
 238
 239         /* Write out the address of the gatt table */
 240         OUTREG32(ati_generic_private.registers, ATI_GART_BASE,
 241                  agp_bridge->gatt_bus_addr);
 242
 243         return 0;
 244 }
 245
 246
 247 /*
 248  *Since we don't need contigious memory we just try
 249  * to get the gatt table once
 250  */
 251
 252 #define GET_PAGE_DIR_OFF(addr) (addr >> 22)
 253 #define GET_PAGE_DIR_IDX(addr) (GET_PAGE_DIR_OFF(addr) - \
 254         GET_PAGE_DIR_OFF(agp_bridge->gart_bus_addr))
 255 #define GET_GATT_OFF(addr) ((addr & 0x003ff000) >> 12)
 256 #undef  GET_GATT
 257 #define GET_GATT(addr) (ati_generic_private.gatt_pages[\
 258         GET_PAGE_DIR_IDX(addr)]->remapped)
 259
 260 static int ati_insert_memory(struct agp_memory * mem,
 261                              off_t pg_start, int type)
 262 {
 263         int i, j, num_entries;
 264         unsigned long __iomem *cur_gatt;
 265         unsigned long addr;
 266
 267         num_entries = A_SIZE_LVL2(agp_bridge->current_size)->num_entries;
 268
 269         if (type != 0 || mem->type != 0)
 270                 return -EINVAL;
 271
 272         if ((pg_start + mem->page_count) > num_entries)
 273                 return -EINVAL;
 274
 275         j = pg_start;
 276         while (j < (pg_start + mem->page_count)) {
 277                 addr = (j * PAGE_SIZE) + agp_bridge->gart_bus_addr;
 278                 cur_gatt = GET_GATT(addr);
 279                 if (!PGE_EMPTY(agp_bridge,readl(cur_gatt+GET_GATT_OFF(addr))))
 280                         return -EBUSY;
 281                 j++;
 282         }
 283
 284         if (mem->is_flushed == FALSE) {
 285                 /*CACHE_FLUSH(); */
 286                 global_cache_flush();
 287                 mem->is_flushed = TRUE;
 288         }
 289
 290         for (i = 0, j = pg_start; i < mem->page_count; i++, j++) {
 291                 addr = (j * PAGE_SIZE) + agp_bridge->gart_bus_addr;
 292                 cur_gatt = GET_GATT(addr);
 293                 writel(agp_bridge->driver->mask_memory(mem->memory[i], mem->type), cur_gatt+GET_GATT_OFF(addr));
 294         }
 295         agp_bridge->driver->tlb_flush(mem);
 296         return 0;
 297 }
 298
 299 static int ati_remove_memory(struct agp_memory * mem, off_t pg_start,
 300                              int type)
 301 {
 302         int i;
 303         unsigned long __iomem *cur_gatt;
 304         unsigned long addr;
 305
 306         if (type != 0 || mem->type != 0) {
 307                 return -EINVAL;
 308         }
 309         for (i = pg_start; i < (mem->page_count + pg_start); i++) {
 310                 addr = (i * PAGE_SIZE) + agp_bridge->gart_bus_addr;
 311                 cur_gatt = GET_GATT(addr);
 312                 writel(agp_bridge->scratch_page, cur_gatt+GET_GATT_OFF(addr));
 313         }
 314
 315         agp_bridge->driver->tlb_flush(mem);
 316         return 0;
 317 }
 318
 319 static int ati_create_gatt_table(void)
 320 {
 321         struct aper_size_info_lvl2 *value;
 322         ati_page_map page_dir;
 323         unsigned long addr;
 324         int retval;
 325         u32 temp;
 326         int i;
 327         struct aper_size_info_lvl2 *current_size;
 328
 329         value = A_SIZE_LVL2(agp_bridge->current_size);
 330         retval = ati_create_page_map(&page_dir);
 331         if (retval != 0)
 332                 return retval;
 333
 334         retval = ati_create_gatt_pages(value->num_entries / 1024);
 335         if (retval != 0) {
 336                 ati_free_page_map(&page_dir);
 337                 return retval;
 338         }
 339
 340         agp_bridge->gatt_table_real = (u32 *)page_dir.real;
 341         agp_bridge->gatt_table = (u32 __iomem *) page_dir.remapped;
 342         agp_bridge->gatt_bus_addr = virt_to_bus(page_dir.real);
 343
 344         /* Write out the size register */
 345         current_size = A_SIZE_LVL2(agp_bridge->current_size);
 346
 347         if (is_r200()) {
 348                 pci_read_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, &temp);
 349                 temp = (((temp & ~(0x0000000e)) | current_size->size_value)
 350                         | 0x00000001);
 351                 pci_write_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, temp);
 352                 pci_read_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, &temp);
 353         } else {
 354                 pci_read_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, &temp);
 355                 temp = (((temp & ~(0x0000000e)) | current_size->size_value)
 356                         | 0x00000001);
 357                 pci_write_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, temp);
 358                 pci_read_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, &temp);
 359         }
 360
 361         /*
 362          * Get the address for the gart region.
 363          * This is a bus address even on the alpha, b/c its
 364          * used to program the agp master not the cpu
 365          */
 366         pci_read_config_dword(agp_bridge->dev, AGP_APBASE, &temp);
 367         addr = (temp & PCI_BASE_ADDRESS_MEM_MASK);
 368         agp_bridge->gart_bus_addr = addr;
 369
 370         /* Calculate the agp offset */
 371         for(i = 0; i < value->num_entries / 1024; i++, addr += 0x00400000) {
 372                 writel(virt_to_bus(ati_generic_private.gatt_pages[i]->real) | 1,
 373                         page_dir.remapped+GET_PAGE_DIR_OFF(addr));
 374         }
 375
 376         return 0;
 377 }
 378
 379 static int ati_free_gatt_table(void)
 380 {
 381         ati_page_map page_dir;
 382
 383         page_dir.real = (unsigned long *)agp_bridge->gatt_table_real;
 384         page_dir.remapped = (unsigned long __iomem *)agp_bridge->gatt_table;
 385
 386         ati_free_gatt_pages();
 387         ati_free_page_map(&page_dir);
 388         return 0;
 389 }
 390
 391 struct agp_bridge_driver ati_generic_bridge = {
 392         .owner                  = THIS_MODULE,
 393         .aperture_sizes         = ati_generic_sizes,
 394         .size_type              = LVL2_APER_SIZE,
 395         .num_aperture_sizes     = 7,
 396         .configure              = ati_configure,
 397         .fetch_size             = ati_fetch_size,
 398         .cleanup                = ati_cleanup,
 399         .tlb_flush              = ati_tlbflush,
 400         .mask_memory            = agp_generic_mask_memory,
 401         .masks                  = ati_generic_masks,
 402         .agp_enable             = agp_generic_enable,
 403         .cache_flush            = global_cache_flush,
 404         .create_gatt_table      = ati_create_gatt_table,
 405         .free_gatt_table        = ati_free_gatt_table,
 406         .insert_memory          = ati_insert_memory,
 407         .remove_memory          = ati_remove_memory,
 408         .alloc_by_type          = agp_generic_alloc_by_type,
 409         .free_by_type           = agp_generic_free_by_type,
 410         .agp_alloc_page         = agp_generic_alloc_page,
 411         .agp_destroy_page       = agp_generic_destroy_page,
 412 };
 413
 414
 415 static struct agp_device_ids ati_agp_device_ids[] __devinitdata =
 416 {
 417         {
 418                 .device_id      = PCI_DEVICE_ID_ATI_RS100,
 419                 .chipset_name   = "IGP320/M",
 420         },
 421         {
 422                 .device_id      = PCI_DEVICE_ID_ATI_RS200,
 423                 .chipset_name   = "IGP330/340/345/350/M",
 424         },
 425         {
 426                 .device_id      = PCI_DEVICE_ID_ATI_RS200_B,
 427                 .chipset_name   = "IGP345M",
 428         },
 429         {
 430                 .device_id      = PCI_DEVICE_ID_ATI_RS250,
 431                 .chipset_name   = "IGP7000/M",
 432         },
 433         {
 434                 .device_id      = PCI_DEVICE_ID_ATI_RS300_100,
 435                 .chipset_name   = "IGP9100/M",
 436         },
 437         {
 438                 .device_id      = PCI_DEVICE_ID_ATI_RS300_133,
 439                 .chipset_name   = "IGP9100/M",
 440         },
 441         {
 442                 .device_id      = PCI_DEVICE_ID_ATI_RS300_166,
 443                 .chipset_name   = "IGP9100/M",
 444         },
 445         {
 446                 .device_id      = PCI_DEVICE_ID_ATI_RS300_200,
 447                 .chipset_name   = "IGP9100/M",
 448         },
 449         { }, /* dummy final entry, always present */
 450 };
 451
 452 static int __devinit agp_ati_probe(struct pci_dev *pdev,
 453                                    const struct pci_device_id *ent)
 454 {
 455         struct agp_device_ids *devs = ati_agp_device_ids;
 456         struct agp_bridge_data *bridge;
 457         u8 cap_ptr;
 458         int j;
 459
 460         cap_ptr = pci_find_capability(pdev, PCI_CAP_ID_AGP);
 461         if (!cap_ptr)
 462                 return -ENODEV;
 463
 464         /* probe for known chipsets */
 465         for (j = 0; devs[j].chipset_name; j++) {
 466                 if (pdev->device == devs[j].device_id)
 467                         goto found;
 468         }
 469
 470         printk(KERN_ERR PFX
 471              "Unsupported Ati chipset (device id: %04x)\n", pdev->device);
 472         return -ENODEV;
 473
 474 found:
 475         bridge = agp_alloc_bridge();
 476         if (!bridge)
 477                 return -ENOMEM;
 478
 479         bridge->dev = pdev;
 480         bridge->capndx = cap_ptr;
 481
 482         bridge->driver = &ati_generic_bridge;
 483
 484
 485         printk(KERN_INFO PFX "Detected Ati %s chipset\n",
 486                         devs[j].chipset_name);
 487
 488         /* Fill in the mode register */
 489         pci_read_config_dword(pdev,
 490                         bridge->capndx+PCI_AGP_STATUS,
 491                         &bridge->mode);
 492
 493         pci_set_drvdata(pdev, bridge);
 494         return agp_add_bridge(bridge);
 495 }
 496
 497 static void __devexit agp_ati_remove(struct pci_dev *pdev)
 498 {
 499         struct agp_bridge_data *bridge = pci_get_drvdata(pdev);
 500
 501         agp_remove_bridge(bridge);
 502         agp_put_bridge(bridge);
 503 }
 504
 505 static struct pci_device_id agp_ati_pci_table[] = {
 506         {
 507         .class          = (PCI_CLASS_BRIDGE_HOST << 8),
 508         .class_mask     = ~0,
 509         .vendor         = PCI_VENDOR_ID_ATI,
 510         .device         = PCI_ANY_ID,
 511         .subvendor      = PCI_ANY_ID,
 512         .subdevice      = PCI_ANY_ID,
 513         },
 514         { }
 515 };
 516
 517 MODULE_DEVICE_TABLE(pci, agp_ati_pci_table);
 518
 519 static struct pci_driver agp_ati_pci_driver = {
 520         .name           = "agpgart-ati",
 521         .id_table       = agp_ati_pci_table,
 522         .probe          = agp_ati_probe,
 523         .remove         = agp_ati_remove,
 524 };
 525
 526 static int __init agp_ati_init(void)
 527 {
 528         return pci_module_init(&agp_ati_pci_driver);
 529 }
 530
 531 static void __exit agp_ati_cleanup(void)
 532 {
 533         pci_unregister_driver(&agp_ati_pci_driver);
 534 }
 535
 536 module_init(agp_ati_init);
 537 module_exit(agp_ati_cleanup);
 538
 539 MODULE_AUTHOR("Dave Jones <davej@codemonkey.org.uk>");
 540 MODULE_LICENSE("GPL and additional rights");
 541