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 <asm/set_memory.h>
  14 #include "agp.h"
  15
  16 #define ATI_GART_MMBASE_BAR     1
  17 #define ATI_RS100_APSIZE        0xac
  18 #define ATI_RS100_IG_AGPMODE    0xb0
  19 #define ATI_RS300_APSIZE        0xf8
  20 #define ATI_RS300_IG_AGPMODE    0xfc
  21 #define ATI_GART_FEATURE_ID             0x00
  22 #define ATI_GART_BASE                   0x04
  23 #define ATI_GART_CACHE_SZBASE           0x08
  24 #define ATI_GART_CACHE_CNTRL            0x0c
  25 #define ATI_GART_CACHE_ENTRY_CNTRL      0x10
  26
  27
  28 static const struct aper_size_info_lvl2 ati_generic_sizes[7] =
  29 {
  30         {2048, 524288, 0x0000000c},
  31         {1024, 262144, 0x0000000a},
  32         {512, 131072, 0x00000008},
  33         {256, 65536, 0x00000006},
  34         {128, 32768, 0x00000004},
  35         {64, 16384, 0x00000002},
  36         {32, 8192, 0x00000000}
  37 };
  38
  39 static struct gatt_mask ati_generic_masks[] =
  40 {
  41         { .mask = 1, .type = 0}
  42 };
  43
  44
  45 struct ati_page_map {
  46         unsigned long *real;
  47         unsigned long __iomem *remapped;
  48 };
  49
  50 static struct _ati_generic_private {
  51         volatile u8 __iomem *registers;
  52         struct ati_page_map **gatt_pages;
  53         int num_tables;
  54 } ati_generic_private;
  55
  56 static int ati_create_page_map(struct ati_page_map *page_map)
  57 {
  58         int i, err = 0;
  59
  60         page_map->real = (unsigned long *) __get_free_page(GFP_KERNEL);
  61         if (page_map->real == NULL)
  62                 return -ENOMEM;
  63
  64         set_memory_uc((unsigned long)page_map->real, 1);
  65         err = map_page_into_agp(virt_to_page(page_map->real));
  66         page_map->remapped = page_map->real;
  67
  68         for (i = 0; i < PAGE_SIZE / sizeof(unsigned long); i++) {
  69                 writel(agp_bridge->scratch_page, page_map->remapped+i);
  70                 readl(page_map->remapped+i);    /* PCI Posting. */
  71         }
  72
  73         return 0;
  74 }
  75
  76
  77 static void ati_free_page_map(struct ati_page_map *page_map)
  78 {
  79         unmap_page_from_agp(virt_to_page(page_map->real));
  80         set_memory_wb((unsigned long)page_map->real, 1);
  81         free_page((unsigned long) page_map->real);
  82 }
  83
  84
  85 static void ati_free_gatt_pages(void)
  86 {
  87         int i;
  88         struct ati_page_map **tables;
  89         struct ati_page_map *entry;
  90
  91         tables = ati_generic_private.gatt_pages;
  92         for (i = 0; i < ati_generic_private.num_tables; i++) {
  93                 entry = tables[i];
  94                 if (entry != NULL) {
  95                         if (entry->real != NULL)
  96                                 ati_free_page_map(entry);
  97                         kfree(entry);
  98                 }
  99         }
 100         kfree(tables);
 101 }
 102
 103
 104 static int ati_create_gatt_pages(int nr_tables)
 105 {
 106         struct ati_page_map **tables;
 107         struct ati_page_map *entry;
 108         int retval = 0;
 109         int i;
 110
 111         tables = kzalloc((nr_tables + 1) * sizeof(struct ati_page_map *),GFP_KERNEL);
 112         if (tables == NULL)
 113                 return -ENOMEM;
 114
 115         for (i = 0; i < nr_tables; i++) {
 116                 entry = kzalloc(sizeof(struct ati_page_map), GFP_KERNEL);
 117                 tables[i] = entry;
 118                 if (entry == NULL) {
 119                         retval = -ENOMEM;
 120                         break;
 121                 }
 122                 retval = ati_create_page_map(entry);
 123                 if (retval != 0)
 124                         break;
 125         }
 126         ati_generic_private.num_tables = i;
 127         ati_generic_private.gatt_pages = tables;
 128
 129         if (retval != 0)
 130                 ati_free_gatt_pages();
 131
 132         return retval;
 133 }
 134
 135 static int is_r200(void)
 136 {
 137         if ((agp_bridge->dev->device == PCI_DEVICE_ID_ATI_RS100) ||
 138             (agp_bridge->dev->device == PCI_DEVICE_ID_ATI_RS200) ||
 139             (agp_bridge->dev->device == PCI_DEVICE_ID_ATI_RS200_B) ||
 140             (agp_bridge->dev->device == PCI_DEVICE_ID_ATI_RS250))
 141                 return 1;
 142         return 0;
 143 }
 144
 145 static int ati_fetch_size(void)
 146 {
 147         int i;
 148         u32 temp;
 149         struct aper_size_info_lvl2 *values;
 150
 151         if (is_r200())
 152                 pci_read_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, &temp);
 153         else
 154                 pci_read_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, &temp);
 155
 156         temp = (temp & 0x0000000e);
 157         values = A_SIZE_LVL2(agp_bridge->driver->aperture_sizes);
 158         for (i = 0; i < agp_bridge->driver->num_aperture_sizes; i++) {
 159                 if (temp == values[i].size_value) {
 160                         agp_bridge->previous_size =
 161                             agp_bridge->current_size = (void *) (values + i);
 162
 163                         agp_bridge->aperture_size_idx = i;
 164                         return values[i].size;
 165                 }
 166         }
 167
 168         return 0;
 169 }
 170
 171 static void ati_tlbflush(struct agp_memory * mem)
 172 {
 173         writel(1, ati_generic_private.registers+ATI_GART_CACHE_CNTRL);
 174         readl(ati_generic_private.registers+ATI_GART_CACHE_CNTRL);      /* PCI Posting. */
 175 }
 176
 177 static void ati_cleanup(void)
 178 {
 179         struct aper_size_info_lvl2 *previous_size;
 180         u32 temp;
 181
 182         previous_size = A_SIZE_LVL2(agp_bridge->previous_size);
 183
 184         /* Write back the previous size and disable gart translation */
 185         if (is_r200()) {
 186                 pci_read_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, &temp);
 187                 temp = ((temp & ~(0x0000000f)) | previous_size->size_value);
 188                 pci_write_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, temp);
 189         } else {
 190                 pci_read_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, &temp);
 191                 temp = ((temp & ~(0x0000000f)) | previous_size->size_value);
 192                 pci_write_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, temp);
 193         }
 194         iounmap((volatile u8 __iomem *)ati_generic_private.registers);
 195 }
 196
 197
 198 static int ati_configure(void)
 199 {
 200         phys_addr_t reg;
 201         u32 temp;
 202
 203         /* Get the memory mapped registers */
 204         reg = pci_resource_start(agp_bridge->dev, ATI_GART_MMBASE_BAR);
 205         ati_generic_private.registers = (volatile u8 __iomem *) ioremap(reg, 4096);
 206
 207         if (!ati_generic_private.registers)
 208                 return -ENOMEM;
 209
 210         if (is_r200())
 211                 pci_write_config_dword(agp_bridge->dev, ATI_RS100_IG_AGPMODE, 0x20000);
 212         else
 213                 pci_write_config_dword(agp_bridge->dev, ATI_RS300_IG_AGPMODE, 0x20000);
 214
 215         /* address to map to */
 216         /*
 217         agp_bridge.gart_bus_addr = pci_bus_address(agp_bridge.dev,
 218                                                    AGP_APERTURE_BAR);
 219         printk(KERN_INFO PFX "IGP320 gart_bus_addr: %x\n", agp_bridge.gart_bus_addr);
 220         */
 221         writel(0x60000, ati_generic_private.registers+ATI_GART_FEATURE_ID);
 222         readl(ati_generic_private.registers+ATI_GART_FEATURE_ID);       /* PCI Posting.*/
 223
 224         /* SIGNALED_SYSTEM_ERROR @ NB_STATUS */
 225         pci_read_config_dword(agp_bridge->dev, PCI_COMMAND, &temp);
 226         pci_write_config_dword(agp_bridge->dev, PCI_COMMAND, temp | (1<<14));
 227
 228         /* Write out the address of the gatt table */
 229         writel(agp_bridge->gatt_bus_addr, ati_generic_private.registers+ATI_GART_BASE);
 230         readl(ati_generic_private.registers+ATI_GART_BASE);     /* PCI Posting. */
 231
 232         return 0;
 233 }
 234
 235
 236 #ifdef CONFIG_PM
 237 static int agp_ati_suspend(struct pci_dev *dev, pm_message_t state)
 238 {
 239         pci_save_state(dev);
 240         pci_set_power_state(dev, PCI_D3hot);
 241
 242         return 0;
 243 }
 244
 245 static int agp_ati_resume(struct pci_dev *dev)
 246 {
 247         pci_set_power_state(dev, PCI_D0);
 248         pci_restore_state(dev);
 249
 250         return ati_configure();
 251 }
 252 #endif
 253
 254 /*
 255  *Since we don't need contiguous memory we just try
 256  * to get the gatt table once
 257  */
 258
 259 #define GET_PAGE_DIR_OFF(addr) (addr >> 22)
 260 #define GET_PAGE_DIR_IDX(addr) (GET_PAGE_DIR_OFF(addr) - \
 261         GET_PAGE_DIR_OFF(agp_bridge->gart_bus_addr))
 262 #define GET_GATT_OFF(addr) ((addr & 0x003ff000) >> 12)
 263 #undef  GET_GATT
 264 #define GET_GATT(addr) (ati_generic_private.gatt_pages[\
 265         GET_PAGE_DIR_IDX(addr)]->remapped)
 266
 267 static int ati_insert_memory(struct agp_memory * mem,
 268                              off_t pg_start, int type)
 269 {
 270         int i, j, num_entries;
 271         unsigned long __iomem *cur_gatt;
 272         unsigned long addr;
 273         int mask_type;
 274
 275         num_entries = A_SIZE_LVL2(agp_bridge->current_size)->num_entries;
 276
 277         mask_type = agp_generic_type_to_mask_type(mem->bridge, type);
 278         if (mask_type != 0 || type != mem->type)
 279                 return -EINVAL;
 280
 281         if (mem->page_count == 0)
 282                 return 0;
 283
 284         if ((pg_start + mem->page_count) > num_entries)
 285                 return -EINVAL;
 286
 287         j = pg_start;
 288         while (j < (pg_start + mem->page_count)) {
 289                 addr = (j * PAGE_SIZE) + agp_bridge->gart_bus_addr;
 290                 cur_gatt = GET_GATT(addr);
 291                 if (!PGE_EMPTY(agp_bridge,readl(cur_gatt+GET_GATT_OFF(addr))))
 292                         return -EBUSY;
 293                 j++;
 294         }
 295
 296         if (!mem->is_flushed) {
 297                 /*CACHE_FLUSH(); */
 298                 global_cache_flush();
 299                 mem->is_flushed = true;
 300         }
 301
 302         for (i = 0, j = pg_start; i < mem->page_count; i++, j++) {
 303                 addr = (j * PAGE_SIZE) + agp_bridge->gart_bus_addr;
 304                 cur_gatt = GET_GATT(addr);
 305                 writel(agp_bridge->driver->mask_memory(agp_bridge,
 306                                                        page_to_phys(mem->pages[i]),
 307                                                        mem->type),
 308                        cur_gatt+GET_GATT_OFF(addr));
 309         }
 310         readl(GET_GATT(agp_bridge->gart_bus_addr)); /* PCI posting */
 311         agp_bridge->driver->tlb_flush(mem);
 312         return 0;
 313 }
 314
 315 static int ati_remove_memory(struct agp_memory * mem, off_t pg_start,
 316                              int type)
 317 {
 318         int i;
 319         unsigned long __iomem *cur_gatt;
 320         unsigned long addr;
 321         int mask_type;
 322
 323         mask_type = agp_generic_type_to_mask_type(mem->bridge, type);
 324         if (mask_type != 0 || type != mem->type)
 325                 return -EINVAL;
 326
 327         if (mem->page_count == 0)
 328                 return 0;
 329
 330         for (i = pg_start; i < (mem->page_count + pg_start); i++) {
 331                 addr = (i * PAGE_SIZE) + agp_bridge->gart_bus_addr;
 332                 cur_gatt = GET_GATT(addr);
 333                 writel(agp_bridge->scratch_page, cur_gatt+GET_GATT_OFF(addr));
 334         }
 335
 336         readl(GET_GATT(agp_bridge->gart_bus_addr)); /* PCI posting */
 337         agp_bridge->driver->tlb_flush(mem);
 338         return 0;
 339 }
 340
 341 static int ati_create_gatt_table(struct agp_bridge_data *bridge)
 342 {
 343         struct aper_size_info_lvl2 *value;
 344         struct ati_page_map page_dir;
 345         unsigned long __iomem *cur_gatt;
 346         unsigned long addr;
 347         int retval;
 348         u32 temp;
 349         int i;
 350         struct aper_size_info_lvl2 *current_size;
 351
 352         value = A_SIZE_LVL2(agp_bridge->current_size);
 353         retval = ati_create_page_map(&page_dir);
 354         if (retval != 0)
 355                 return retval;
 356
 357         retval = ati_create_gatt_pages(value->num_entries / 1024);
 358         if (retval != 0) {
 359                 ati_free_page_map(&page_dir);
 360                 return retval;
 361         }
 362
 363         agp_bridge->gatt_table_real = (u32 *)page_dir.real;
 364         agp_bridge->gatt_table = (u32 __iomem *) page_dir.remapped;
 365         agp_bridge->gatt_bus_addr = virt_to_phys(page_dir.real);
 366
 367         /* Write out the size register */
 368         current_size = A_SIZE_LVL2(agp_bridge->current_size);
 369
 370         if (is_r200()) {
 371                 pci_read_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, &temp);
 372                 temp = (((temp & ~(0x0000000e)) | current_size->size_value)
 373                         | 0x00000001);
 374                 pci_write_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, temp);
 375                 pci_read_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, &temp);
 376         } else {
 377                 pci_read_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, &temp);
 378                 temp = (((temp & ~(0x0000000e)) | current_size->size_value)
 379                         | 0x00000001);
 380                 pci_write_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, temp);
 381                 pci_read_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, &temp);
 382         }
 383
 384         /*
 385          * Get the address for the gart region.
 386          * This is a bus address even on the alpha, b/c its
 387          * used to program the agp master not the cpu
 388          */
 389         addr = pci_bus_address(agp_bridge->dev, AGP_APERTURE_BAR);
 390         agp_bridge->gart_bus_addr = addr;
 391
 392         /* Calculate the agp offset */
 393         for (i = 0; i < value->num_entries / 1024; i++, addr += 0x00400000) {
 394                 writel(virt_to_phys(ati_generic_private.gatt_pages[i]->real) | 1,
 395                         page_dir.remapped+GET_PAGE_DIR_OFF(addr));
 396                 readl(page_dir.remapped+GET_PAGE_DIR_OFF(addr));        /* PCI Posting. */
 397         }
 398
 399         for (i = 0; i < value->num_entries; i++) {
 400                 addr = (i * PAGE_SIZE) + agp_bridge->gart_bus_addr;
 401                 cur_gatt = GET_GATT(addr);
 402                 writel(agp_bridge->scratch_page, cur_gatt+GET_GATT_OFF(addr));
 403         }
 404
 405         return 0;
 406 }
 407
 408 static int ati_free_gatt_table(struct agp_bridge_data *bridge)
 409 {
 410         struct ati_page_map page_dir;
 411
 412         page_dir.real = (unsigned long *)agp_bridge->gatt_table_real;
 413         page_dir.remapped = (unsigned long __iomem *)agp_bridge->gatt_table;
 414
 415         ati_free_gatt_pages();
 416         ati_free_page_map(&page_dir);
 417         return 0;
 418 }
 419
 420 static const struct agp_bridge_driver ati_generic_bridge = {
 421         .owner                  = THIS_MODULE,
 422         .aperture_sizes         = ati_generic_sizes,
 423         .size_type              = LVL2_APER_SIZE,
 424         .num_aperture_sizes     = 7,
 425         .needs_scratch_page     = true,
 426         .configure              = ati_configure,
 427         .fetch_size             = ati_fetch_size,
 428         .cleanup                = ati_cleanup,
 429         .tlb_flush              = ati_tlbflush,
 430         .mask_memory            = agp_generic_mask_memory,
 431         .masks                  = ati_generic_masks,
 432         .agp_enable             = agp_generic_enable,
 433         .cache_flush            = global_cache_flush,
 434         .create_gatt_table      = ati_create_gatt_table,
 435         .free_gatt_table        = ati_free_gatt_table,
 436         .insert_memory          = ati_insert_memory,
 437         .remove_memory          = ati_remove_memory,
 438         .alloc_by_type          = agp_generic_alloc_by_type,
 439         .free_by_type           = agp_generic_free_by_type,
 440         .agp_alloc_page         = agp_generic_alloc_page,
 441         .agp_alloc_pages        = agp_generic_alloc_pages,
 442         .agp_destroy_page       = agp_generic_destroy_page,
 443         .agp_destroy_pages      = agp_generic_destroy_pages,
 444         .agp_type_to_mask_type  = agp_generic_type_to_mask_type,
 445 };
 446
 447
 448 static struct agp_device_ids ati_agp_device_ids[] =
 449 {
 450         {
 451                 .device_id      = PCI_DEVICE_ID_ATI_RS100,
 452                 .chipset_name   = "IGP320/M",
 453         },
 454         {
 455                 .device_id      = PCI_DEVICE_ID_ATI_RS200,
 456                 .chipset_name   = "IGP330/340/345/350/M",
 457         },
 458         {
 459                 .device_id      = PCI_DEVICE_ID_ATI_RS200_B,
 460                 .chipset_name   = "IGP345M",
 461         },
 462         {
 463                 .device_id      = PCI_DEVICE_ID_ATI_RS250,
 464                 .chipset_name   = "IGP7000/M",
 465         },
 466         {
 467                 .device_id      = PCI_DEVICE_ID_ATI_RS300_100,
 468                 .chipset_name   = "IGP9100/M",
 469         },
 470         {
 471                 .device_id      = PCI_DEVICE_ID_ATI_RS300_133,
 472                 .chipset_name   = "IGP9100/M",
 473         },
 474         {
 475                 .device_id      = PCI_DEVICE_ID_ATI_RS300_166,
 476                 .chipset_name   = "IGP9100/M",
 477         },
 478         {
 479                 .device_id      = PCI_DEVICE_ID_ATI_RS300_200,
 480                 .chipset_name   = "IGP9100/M",
 481         },
 482         {
 483                 .device_id      = PCI_DEVICE_ID_ATI_RS350_133,
 484                 .chipset_name   = "IGP9000/M",
 485         },
 486         {
 487                 .device_id      = PCI_DEVICE_ID_ATI_RS350_200,
 488                 .chipset_name   = "IGP9100/M",
 489         },
 490         { }, /* dummy final entry, always present */
 491 };
 492
 493 static int agp_ati_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 494 {
 495         struct agp_device_ids *devs = ati_agp_device_ids;
 496         struct agp_bridge_data *bridge;
 497         u8 cap_ptr;
 498         int j;
 499
 500         cap_ptr = pci_find_capability(pdev, PCI_CAP_ID_AGP);
 501         if (!cap_ptr)
 502                 return -ENODEV;
 503
 504         /* probe for known chipsets */
 505         for (j = 0; devs[j].chipset_name; j++) {
 506                 if (pdev->device == devs[j].device_id)
 507                         goto found;
 508         }
 509
 510         dev_err(&pdev->dev, "unsupported Ati chipset [%04x/%04x])\n",
 511                 pdev->vendor, pdev->device);
 512         return -ENODEV;
 513
 514 found:
 515         bridge = agp_alloc_bridge();
 516         if (!bridge)
 517                 return -ENOMEM;
 518
 519         bridge->dev = pdev;
 520         bridge->capndx = cap_ptr;
 521
 522         bridge->driver = &ati_generic_bridge;
 523
 524         dev_info(&pdev->dev, "Ati %s chipset\n", devs[j].chipset_name);
 525
 526         /* Fill in the mode register */
 527         pci_read_config_dword(pdev,
 528                         bridge->capndx+PCI_AGP_STATUS,
 529                         &bridge->mode);
 530
 531         pci_set_drvdata(pdev, bridge);
 532         return agp_add_bridge(bridge);
 533 }
 534
 535 static void agp_ati_remove(struct pci_dev *pdev)
 536 {
 537         struct agp_bridge_data *bridge = pci_get_drvdata(pdev);
 538
 539         agp_remove_bridge(bridge);
 540         agp_put_bridge(bridge);
 541 }
 542
 543 static struct pci_device_id agp_ati_pci_table[] = {
 544         {
 545         .class          = (PCI_CLASS_BRIDGE_HOST << 8),
 546         .class_mask     = ~0,
 547         .vendor         = PCI_VENDOR_ID_ATI,
 548         .device         = PCI_ANY_ID,
 549         .subvendor      = PCI_ANY_ID,
 550         .subdevice      = PCI_ANY_ID,
 551         },
 552         { }
 553 };
 554
 555 MODULE_DEVICE_TABLE(pci, agp_ati_pci_table);
 556
 557 static struct pci_driver agp_ati_pci_driver = {
 558         .name           = "agpgart-ati",
 559         .id_table       = agp_ati_pci_table,
 560         .probe          = agp_ati_probe,
 561         .remove         = agp_ati_remove,
 562 #ifdef CONFIG_PM
 563         .suspend        = agp_ati_suspend,
 564         .resume         = agp_ati_resume,
 565 #endif
 566 };
 567
 568 static int __init agp_ati_init(void)
 569 {
 570         if (agp_off)
 571                 return -EINVAL;
 572         return pci_register_driver(&agp_ati_pci_driver);
 573 }
 574
 575 static void __exit agp_ati_cleanup(void)
 576 {
 577         pci_unregister_driver(&agp_ati_pci_driver);
 578 }
 579
 580 module_init(agp_ati_init);
 581 module_exit(agp_ati_cleanup);
 582
 583 MODULE_AUTHOR("Dave Jones");
 584 MODULE_LICENSE("GPL and additional rights");
 585