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;
  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         if (err) {
  67                 free_page((unsigned long)page_map->real);
  68                 return err;
  69         }
  70         page_map->remapped = page_map->real;
  71
  72         for (i = 0; i < PAGE_SIZE / sizeof(unsigned long); i++) {
  73                 writel(agp_bridge->scratch_page, page_map->remapped+i);
  74                 readl(page_map->remapped+i);    /* PCI Posting. */
  75         }
  76
  77         return 0;
  78 }
  79
  80
  81 static void ati_free_page_map(struct ati_page_map *page_map)
  82 {
  83         unmap_page_from_agp(virt_to_page(page_map->real));
  84         set_memory_wb((unsigned long)page_map->real, 1);
  85         free_page((unsigned long) page_map->real);
  86 }
  87
  88
  89 static void ati_free_gatt_pages(void)
  90 {
  91         int i;
  92         struct ati_page_map **tables;
  93         struct ati_page_map *entry;
  94
  95         tables = ati_generic_private.gatt_pages;
  96         for (i = 0; i < ati_generic_private.num_tables; i++) {
  97                 entry = tables[i];
  98                 if (entry != NULL) {
  99                         if (entry->real != NULL)
 100                                 ati_free_page_map(entry);
 101                         kfree(entry);
 102                 }
 103         }
 104         kfree(tables);
 105 }
 106
 107
 108 static int ati_create_gatt_pages(int nr_tables)
 109 {
 110         struct ati_page_map **tables;
 111         struct ati_page_map *entry;
 112         int retval = 0;
 113         int i;
 114
 115         tables = kcalloc(nr_tables + 1, sizeof(struct ati_page_map *),
 116                          GFP_KERNEL);
 117         if (tables == NULL)
 118                 return -ENOMEM;
 119
 120         for (i = 0; i < nr_tables; i++) {
 121                 entry = kzalloc(sizeof(struct ati_page_map), GFP_KERNEL);
 122                 tables[i] = entry;
 123                 if (entry == NULL) {
 124                         retval = -ENOMEM;
 125                         break;
 126                 }
 127                 retval = ati_create_page_map(entry);
 128                 if (retval != 0)
 129                         break;
 130         }
 131         ati_generic_private.num_tables = i;
 132         ati_generic_private.gatt_pages = tables;
 133
 134         if (retval != 0)
 135                 ati_free_gatt_pages();
 136
 137         return retval;
 138 }
 139
 140 static int is_r200(void)
 141 {
 142         if ((agp_bridge->dev->device == PCI_DEVICE_ID_ATI_RS100) ||
 143             (agp_bridge->dev->device == PCI_DEVICE_ID_ATI_RS200) ||
 144             (agp_bridge->dev->device == PCI_DEVICE_ID_ATI_RS200_B) ||
 145             (agp_bridge->dev->device == PCI_DEVICE_ID_ATI_RS250))
 146                 return 1;
 147         return 0;
 148 }
 149
 150 static int ati_fetch_size(void)
 151 {
 152         int i;
 153         u32 temp;
 154         struct aper_size_info_lvl2 *values;
 155
 156         if (is_r200())
 157                 pci_read_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, &temp);
 158         else
 159                 pci_read_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, &temp);
 160
 161         temp = (temp & 0x0000000e);
 162         values = A_SIZE_LVL2(agp_bridge->driver->aperture_sizes);
 163         for (i = 0; i < agp_bridge->driver->num_aperture_sizes; i++) {
 164                 if (temp == values[i].size_value) {
 165                         agp_bridge->previous_size =
 166                             agp_bridge->current_size = (void *) (values + i);
 167
 168                         agp_bridge->aperture_size_idx = i;
 169                         return values[i].size;
 170                 }
 171         }
 172
 173         return 0;
 174 }
 175
 176 static void ati_tlbflush(struct agp_memory * mem)
 177 {
 178         writel(1, ati_generic_private.registers+ATI_GART_CACHE_CNTRL);
 179         readl(ati_generic_private.registers+ATI_GART_CACHE_CNTRL);      /* PCI Posting. */
 180 }
 181
 182 static void ati_cleanup(void)
 183 {
 184         struct aper_size_info_lvl2 *previous_size;
 185         u32 temp;
 186
 187         previous_size = A_SIZE_LVL2(agp_bridge->previous_size);
 188
 189         /* Write back the previous size and disable gart translation */
 190         if (is_r200()) {
 191                 pci_read_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, &temp);
 192                 temp = ((temp & ~(0x0000000f)) | previous_size->size_value);
 193                 pci_write_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, temp);
 194         } else {
 195                 pci_read_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, &temp);
 196                 temp = ((temp & ~(0x0000000f)) | previous_size->size_value);
 197                 pci_write_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, temp);
 198         }
 199         iounmap((volatile u8 __iomem *)ati_generic_private.registers);
 200 }
 201
 202
 203 static int ati_configure(void)
 204 {
 205         phys_addr_t reg;
 206         u32 temp;
 207
 208         /* Get the memory mapped registers */
 209         reg = pci_resource_start(agp_bridge->dev, ATI_GART_MMBASE_BAR);
 210         ati_generic_private.registers = (volatile u8 __iomem *) ioremap(reg, 4096);
 211
 212         if (!ati_generic_private.registers)
 213                 return -ENOMEM;
 214
 215         if (is_r200())
 216                 pci_write_config_dword(agp_bridge->dev, ATI_RS100_IG_AGPMODE, 0x20000);
 217         else
 218                 pci_write_config_dword(agp_bridge->dev, ATI_RS300_IG_AGPMODE, 0x20000);
 219
 220         /* address to map to */
 221         /*
 222         agp_bridge.gart_bus_addr = pci_bus_address(agp_bridge.dev,
 223                                                    AGP_APERTURE_BAR);
 224         printk(KERN_INFO PFX "IGP320 gart_bus_addr: %x\n", agp_bridge.gart_bus_addr);
 225         */
 226         writel(0x60000, ati_generic_private.registers+ATI_GART_FEATURE_ID);
 227         readl(ati_generic_private.registers+ATI_GART_FEATURE_ID);       /* PCI Posting.*/
 228
 229         /* SIGNALED_SYSTEM_ERROR @ NB_STATUS */
 230         pci_read_config_dword(agp_bridge->dev, PCI_COMMAND, &temp);
 231         pci_write_config_dword(agp_bridge->dev, PCI_COMMAND, temp | (1<<14));
 232
 233         /* Write out the address of the gatt table */
 234         writel(agp_bridge->gatt_bus_addr, ati_generic_private.registers+ATI_GART_BASE);
 235         readl(ati_generic_private.registers+ATI_GART_BASE);     /* PCI Posting. */
 236
 237         return 0;
 238 }
 239
 240
 241 static int agp_ati_resume(struct device *dev)
 242 {
 243         return ati_configure();
 244 }
 245
 246 /*
 247  *Since we don't need contiguous memory we just try
 248  * to get the gatt table once
 249  */
 250
 251 #define GET_PAGE_DIR_OFF(addr) (addr >> 22)
 252 #define GET_PAGE_DIR_IDX(addr) (GET_PAGE_DIR_OFF(addr) - \
 253         GET_PAGE_DIR_OFF(agp_bridge->gart_bus_addr))
 254 #define GET_GATT_OFF(addr) ((addr & 0x003ff000) >> 12)
 255 #undef  GET_GATT
 256 #define GET_GATT(addr) (ati_generic_private.gatt_pages[\
 257         GET_PAGE_DIR_IDX(addr)]->remapped)
 258
 259 static int ati_insert_memory(struct agp_memory * mem,
 260                              off_t pg_start, int type)
 261 {
 262         int i, j, num_entries;
 263         unsigned long __iomem *cur_gatt;
 264         unsigned long addr;
 265         int mask_type;
 266
 267         num_entries = A_SIZE_LVL2(agp_bridge->current_size)->num_entries;
 268
 269         mask_type = agp_generic_type_to_mask_type(mem->bridge, type);
 270         if (mask_type != 0 || type != mem->type)
 271                 return -EINVAL;
 272
 273         if (mem->page_count == 0)
 274                 return 0;
 275
 276         if ((pg_start + mem->page_count) > num_entries)
 277                 return -EINVAL;
 278
 279         j = pg_start;
 280         while (j < (pg_start + mem->page_count)) {
 281                 addr = (j * PAGE_SIZE) + agp_bridge->gart_bus_addr;
 282                 cur_gatt = GET_GATT(addr);
 283                 if (!PGE_EMPTY(agp_bridge,readl(cur_gatt+GET_GATT_OFF(addr))))
 284                         return -EBUSY;
 285                 j++;
 286         }
 287
 288         if (!mem->is_flushed) {
 289                 /*CACHE_FLUSH(); */
 290                 global_cache_flush();
 291                 mem->is_flushed = true;
 292         }
 293
 294         for (i = 0, j = pg_start; i < mem->page_count; i++, j++) {
 295                 addr = (j * PAGE_SIZE) + agp_bridge->gart_bus_addr;
 296                 cur_gatt = GET_GATT(addr);
 297                 writel(agp_bridge->driver->mask_memory(agp_bridge,
 298                                                        page_to_phys(mem->pages[i]),
 299                                                        mem->type),
 300                        cur_gatt+GET_GATT_OFF(addr));
 301         }
 302         readl(GET_GATT(agp_bridge->gart_bus_addr)); /* PCI posting */
 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         int mask_type;
 314
 315         mask_type = agp_generic_type_to_mask_type(mem->bridge, type);
 316         if (mask_type != 0 || type != mem->type)
 317                 return -EINVAL;
 318
 319         if (mem->page_count == 0)
 320                 return 0;
 321
 322         for (i = pg_start; i < (mem->page_count + pg_start); i++) {
 323                 addr = (i * PAGE_SIZE) + agp_bridge->gart_bus_addr;
 324                 cur_gatt = GET_GATT(addr);
 325                 writel(agp_bridge->scratch_page, cur_gatt+GET_GATT_OFF(addr));
 326         }
 327
 328         readl(GET_GATT(agp_bridge->gart_bus_addr)); /* PCI posting */
 329         agp_bridge->driver->tlb_flush(mem);
 330         return 0;
 331 }
 332
 333 static int ati_create_gatt_table(struct agp_bridge_data *bridge)
 334 {
 335         struct aper_size_info_lvl2 *value;
 336         struct ati_page_map page_dir;
 337         unsigned long __iomem *cur_gatt;
 338         unsigned long addr;
 339         int retval;
 340         u32 temp;
 341         int i;
 342         struct aper_size_info_lvl2 *current_size;
 343
 344         value = A_SIZE_LVL2(agp_bridge->current_size);
 345         retval = ati_create_page_map(&page_dir);
 346         if (retval != 0)
 347                 return retval;
 348
 349         retval = ati_create_gatt_pages(value->num_entries / 1024);
 350         if (retval != 0) {
 351                 ati_free_page_map(&page_dir);
 352                 return retval;
 353         }
 354
 355         agp_bridge->gatt_table_real = (u32 *)page_dir.real;
 356         agp_bridge->gatt_table = (u32 __iomem *) page_dir.remapped;
 357         agp_bridge->gatt_bus_addr = virt_to_phys(page_dir.real);
 358
 359         /* Write out the size register */
 360         current_size = A_SIZE_LVL2(agp_bridge->current_size);
 361
 362         if (is_r200()) {
 363                 pci_read_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, &temp);
 364                 temp = (((temp & ~(0x0000000e)) | current_size->size_value)
 365                         | 0x00000001);
 366                 pci_write_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, temp);
 367                 pci_read_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, &temp);
 368         } else {
 369                 pci_read_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, &temp);
 370                 temp = (((temp & ~(0x0000000e)) | current_size->size_value)
 371                         | 0x00000001);
 372                 pci_write_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, temp);
 373                 pci_read_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, &temp);
 374         }
 375
 376         /*
 377          * Get the address for the gart region.
 378          * This is a bus address even on the alpha, b/c its
 379          * used to program the agp master not the cpu
 380          */
 381         addr = pci_bus_address(agp_bridge->dev, AGP_APERTURE_BAR);
 382         agp_bridge->gart_bus_addr = addr;
 383
 384         /* Calculate the agp offset */
 385         for (i = 0; i < value->num_entries / 1024; i++, addr += 0x00400000) {
 386                 writel(virt_to_phys(ati_generic_private.gatt_pages[i]->real) | 1,
 387                         page_dir.remapped+GET_PAGE_DIR_OFF(addr));
 388                 readl(page_dir.remapped+GET_PAGE_DIR_OFF(addr));        /* PCI Posting. */
 389         }
 390
 391         for (i = 0; i < value->num_entries; i++) {
 392                 addr = (i * PAGE_SIZE) + agp_bridge->gart_bus_addr;
 393                 cur_gatt = GET_GATT(addr);
 394                 writel(agp_bridge->scratch_page, cur_gatt+GET_GATT_OFF(addr));
 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         .needs_scratch_page     = true,
 418         .configure              = ati_configure,
 419         .fetch_size             = ati_fetch_size,
 420         .cleanup                = ati_cleanup,
 421         .tlb_flush              = ati_tlbflush,
 422         .mask_memory            = agp_generic_mask_memory,
 423         .masks                  = ati_generic_masks,
 424         .agp_enable             = agp_generic_enable,
 425         .cache_flush            = global_cache_flush,
 426         .create_gatt_table      = ati_create_gatt_table,
 427         .free_gatt_table        = ati_free_gatt_table,
 428         .insert_memory          = ati_insert_memory,
 429         .remove_memory          = ati_remove_memory,
 430         .alloc_by_type          = agp_generic_alloc_by_type,
 431         .free_by_type           = agp_generic_free_by_type,
 432         .agp_alloc_page         = agp_generic_alloc_page,
 433         .agp_alloc_pages        = agp_generic_alloc_pages,
 434         .agp_destroy_page       = agp_generic_destroy_page,
 435         .agp_destroy_pages      = agp_generic_destroy_pages,
 436         .agp_type_to_mask_type  = agp_generic_type_to_mask_type,
 437 };
 438
 439
 440 static struct agp_device_ids ati_agp_device_ids[] =
 441 {
 442         {
 443                 .device_id      = PCI_DEVICE_ID_ATI_RS100,
 444                 .chipset_name   = "IGP320/M",
 445         },
 446         {
 447                 .device_id      = PCI_DEVICE_ID_ATI_RS200,
 448                 .chipset_name   = "IGP330/340/345/350/M",
 449         },
 450         {
 451                 .device_id      = PCI_DEVICE_ID_ATI_RS200_B,
 452                 .chipset_name   = "IGP345M",
 453         },
 454         {
 455                 .device_id      = PCI_DEVICE_ID_ATI_RS250,
 456                 .chipset_name   = "IGP7000/M",
 457         },
 458         {
 459                 .device_id      = PCI_DEVICE_ID_ATI_RS300_100,
 460                 .chipset_name   = "IGP9100/M",
 461         },
 462         {
 463                 .device_id      = PCI_DEVICE_ID_ATI_RS300_133,
 464                 .chipset_name   = "IGP9100/M",
 465         },
 466         {
 467                 .device_id      = PCI_DEVICE_ID_ATI_RS300_166,
 468                 .chipset_name   = "IGP9100/M",
 469         },
 470         {
 471                 .device_id      = PCI_DEVICE_ID_ATI_RS300_200,
 472                 .chipset_name   = "IGP9100/M",
 473         },
 474         {
 475                 .device_id      = PCI_DEVICE_ID_ATI_RS350_133,
 476                 .chipset_name   = "IGP9000/M",
 477         },
 478         {
 479                 .device_id      = PCI_DEVICE_ID_ATI_RS350_200,
 480                 .chipset_name   = "IGP9100/M",
 481         },
 482         { }, /* dummy final entry, always present */
 483 };
 484
 485 static int agp_ati_probe(struct pci_dev *pdev, 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 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 const 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 DEFINE_SIMPLE_DEV_PM_OPS(agp_ati_pm_ops, NULL, agp_ati_resume);
 550
 551 static struct pci_driver agp_ati_pci_driver = {
 552         .name           = "agpgart-ati",
 553         .id_table       = agp_ati_pci_table,
 554         .probe          = agp_ati_probe,
 555         .remove         = agp_ati_remove,
 556         .driver.pm      = &agp_ati_pm_ops,
 557 };
 558
 559 static int __init agp_ati_init(void)
 560 {
 561         if (agp_off)
 562                 return -EINVAL;
 563         return pci_register_driver(&agp_ati_pci_driver);
 564 }
 565
 566 static void __exit agp_ati_cleanup(void)
 567 {
 568         pci_unregister_driver(&agp_ati_pci_driver);
 569 }
 570
 571 module_init(agp_ati_init);
 572 module_exit(agp_ati_cleanup);
 573
 574 MODULE_AUTHOR("Dave Jones");
 575 MODULE_LICENSE("GPL and additional rights");
 576