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 #ifdef CONFIG_PM
 242 static int agp_ati_suspend(struct pci_dev *dev, pm_message_t state)
 243 {
 244         pci_save_state(dev);
 245         pci_set_power_state(dev, PCI_D3hot);
 246
 247         return 0;
 248 }
 249
 250 static int agp_ati_resume(struct pci_dev *dev)
 251 {
 252         pci_set_power_state(dev, PCI_D0);
 253         pci_restore_state(dev);
 254
 255         return ati_configure();
 256 }
 257 #endif
 258
 259 /*
 260  *Since we don't need contiguous memory we just try
 261  * to get the gatt table once
 262  */
 263
 264 #define GET_PAGE_DIR_OFF(addr) (addr >> 22)
 265 #define GET_PAGE_DIR_IDX(addr) (GET_PAGE_DIR_OFF(addr) - \
 266         GET_PAGE_DIR_OFF(agp_bridge->gart_bus_addr))
 267 #define GET_GATT_OFF(addr) ((addr & 0x003ff000) >> 12)
 268 #undef  GET_GATT
 269 #define GET_GATT(addr) (ati_generic_private.gatt_pages[\
 270         GET_PAGE_DIR_IDX(addr)]->remapped)
 271
 272 static int ati_insert_memory(struct agp_memory * mem,
 273                              off_t pg_start, int type)
 274 {
 275         int i, j, num_entries;
 276         unsigned long __iomem *cur_gatt;
 277         unsigned long addr;
 278         int mask_type;
 279
 280         num_entries = A_SIZE_LVL2(agp_bridge->current_size)->num_entries;
 281
 282         mask_type = agp_generic_type_to_mask_type(mem->bridge, type);
 283         if (mask_type != 0 || type != mem->type)
 284                 return -EINVAL;
 285
 286         if (mem->page_count == 0)
 287                 return 0;
 288
 289         if ((pg_start + mem->page_count) > num_entries)
 290                 return -EINVAL;
 291
 292         j = pg_start;
 293         while (j < (pg_start + mem->page_count)) {
 294                 addr = (j * PAGE_SIZE) + agp_bridge->gart_bus_addr;
 295                 cur_gatt = GET_GATT(addr);
 296                 if (!PGE_EMPTY(agp_bridge,readl(cur_gatt+GET_GATT_OFF(addr))))
 297                         return -EBUSY;
 298                 j++;
 299         }
 300
 301         if (!mem->is_flushed) {
 302                 /*CACHE_FLUSH(); */
 303                 global_cache_flush();
 304                 mem->is_flushed = true;
 305         }
 306
 307         for (i = 0, j = pg_start; i < mem->page_count; i++, j++) {
 308                 addr = (j * PAGE_SIZE) + agp_bridge->gart_bus_addr;
 309                 cur_gatt = GET_GATT(addr);
 310                 writel(agp_bridge->driver->mask_memory(agp_bridge,
 311                                                        page_to_phys(mem->pages[i]),
 312                                                        mem->type),
 313                        cur_gatt+GET_GATT_OFF(addr));
 314         }
 315         readl(GET_GATT(agp_bridge->gart_bus_addr)); /* PCI posting */
 316         agp_bridge->driver->tlb_flush(mem);
 317         return 0;
 318 }
 319
 320 static int ati_remove_memory(struct agp_memory * mem, off_t pg_start,
 321                              int type)
 322 {
 323         int i;
 324         unsigned long __iomem *cur_gatt;
 325         unsigned long addr;
 326         int mask_type;
 327
 328         mask_type = agp_generic_type_to_mask_type(mem->bridge, type);
 329         if (mask_type != 0 || type != mem->type)
 330                 return -EINVAL;
 331
 332         if (mem->page_count == 0)
 333                 return 0;
 334
 335         for (i = pg_start; i < (mem->page_count + pg_start); i++) {
 336                 addr = (i * PAGE_SIZE) + agp_bridge->gart_bus_addr;
 337                 cur_gatt = GET_GATT(addr);
 338                 writel(agp_bridge->scratch_page, cur_gatt+GET_GATT_OFF(addr));
 339         }
 340
 341         readl(GET_GATT(agp_bridge->gart_bus_addr)); /* PCI posting */
 342         agp_bridge->driver->tlb_flush(mem);
 343         return 0;
 344 }
 345
 346 static int ati_create_gatt_table(struct agp_bridge_data *bridge)
 347 {
 348         struct aper_size_info_lvl2 *value;
 349         struct ati_page_map page_dir;
 350         unsigned long __iomem *cur_gatt;
 351         unsigned long addr;
 352         int retval;
 353         u32 temp;
 354         int i;
 355         struct aper_size_info_lvl2 *current_size;
 356
 357         value = A_SIZE_LVL2(agp_bridge->current_size);
 358         retval = ati_create_page_map(&page_dir);
 359         if (retval != 0)
 360                 return retval;
 361
 362         retval = ati_create_gatt_pages(value->num_entries / 1024);
 363         if (retval != 0) {
 364                 ati_free_page_map(&page_dir);
 365                 return retval;
 366         }
 367
 368         agp_bridge->gatt_table_real = (u32 *)page_dir.real;
 369         agp_bridge->gatt_table = (u32 __iomem *) page_dir.remapped;
 370         agp_bridge->gatt_bus_addr = virt_to_phys(page_dir.real);
 371
 372         /* Write out the size register */
 373         current_size = A_SIZE_LVL2(agp_bridge->current_size);
 374
 375         if (is_r200()) {
 376                 pci_read_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, &temp);
 377                 temp = (((temp & ~(0x0000000e)) | current_size->size_value)
 378                         | 0x00000001);
 379                 pci_write_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, temp);
 380                 pci_read_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, &temp);
 381         } else {
 382                 pci_read_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, &temp);
 383                 temp = (((temp & ~(0x0000000e)) | current_size->size_value)
 384                         | 0x00000001);
 385                 pci_write_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, temp);
 386                 pci_read_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, &temp);
 387         }
 388
 389         /*
 390          * Get the address for the gart region.
 391          * This is a bus address even on the alpha, b/c its
 392          * used to program the agp master not the cpu
 393          */
 394         addr = pci_bus_address(agp_bridge->dev, AGP_APERTURE_BAR);
 395         agp_bridge->gart_bus_addr = addr;
 396
 397         /* Calculate the agp offset */
 398         for (i = 0; i < value->num_entries / 1024; i++, addr += 0x00400000) {
 399                 writel(virt_to_phys(ati_generic_private.gatt_pages[i]->real) | 1,
 400                         page_dir.remapped+GET_PAGE_DIR_OFF(addr));
 401                 readl(page_dir.remapped+GET_PAGE_DIR_OFF(addr));        /* PCI Posting. */
 402         }
 403
 404         for (i = 0; i < value->num_entries; i++) {
 405                 addr = (i * PAGE_SIZE) + agp_bridge->gart_bus_addr;
 406                 cur_gatt = GET_GATT(addr);
 407                 writel(agp_bridge->scratch_page, cur_gatt+GET_GATT_OFF(addr));
 408         }
 409
 410         return 0;
 411 }
 412
 413 static int ati_free_gatt_table(struct agp_bridge_data *bridge)
 414 {
 415         struct ati_page_map page_dir;
 416
 417         page_dir.real = (unsigned long *)agp_bridge->gatt_table_real;
 418         page_dir.remapped = (unsigned long __iomem *)agp_bridge->gatt_table;
 419
 420         ati_free_gatt_pages();
 421         ati_free_page_map(&page_dir);
 422         return 0;
 423 }
 424
 425 static const struct agp_bridge_driver ati_generic_bridge = {
 426         .owner                  = THIS_MODULE,
 427         .aperture_sizes         = ati_generic_sizes,
 428         .size_type              = LVL2_APER_SIZE,
 429         .num_aperture_sizes     = 7,
 430         .needs_scratch_page     = true,
 431         .configure              = ati_configure,
 432         .fetch_size             = ati_fetch_size,
 433         .cleanup                = ati_cleanup,
 434         .tlb_flush              = ati_tlbflush,
 435         .mask_memory            = agp_generic_mask_memory,
 436         .masks                  = ati_generic_masks,
 437         .agp_enable             = agp_generic_enable,
 438         .cache_flush            = global_cache_flush,
 439         .create_gatt_table      = ati_create_gatt_table,
 440         .free_gatt_table        = ati_free_gatt_table,
 441         .insert_memory          = ati_insert_memory,
 442         .remove_memory          = ati_remove_memory,
 443         .alloc_by_type          = agp_generic_alloc_by_type,
 444         .free_by_type           = agp_generic_free_by_type,
 445         .agp_alloc_page         = agp_generic_alloc_page,
 446         .agp_alloc_pages        = agp_generic_alloc_pages,
 447         .agp_destroy_page       = agp_generic_destroy_page,
 448         .agp_destroy_pages      = agp_generic_destroy_pages,
 449         .agp_type_to_mask_type  = agp_generic_type_to_mask_type,
 450 };
 451
 452
 453 static struct agp_device_ids ati_agp_device_ids[] =
 454 {
 455         {
 456                 .device_id      = PCI_DEVICE_ID_ATI_RS100,
 457                 .chipset_name   = "IGP320/M",
 458         },
 459         {
 460                 .device_id      = PCI_DEVICE_ID_ATI_RS200,
 461                 .chipset_name   = "IGP330/340/345/350/M",
 462         },
 463         {
 464                 .device_id      = PCI_DEVICE_ID_ATI_RS200_B,
 465                 .chipset_name   = "IGP345M",
 466         },
 467         {
 468                 .device_id      = PCI_DEVICE_ID_ATI_RS250,
 469                 .chipset_name   = "IGP7000/M",
 470         },
 471         {
 472                 .device_id      = PCI_DEVICE_ID_ATI_RS300_100,
 473                 .chipset_name   = "IGP9100/M",
 474         },
 475         {
 476                 .device_id      = PCI_DEVICE_ID_ATI_RS300_133,
 477                 .chipset_name   = "IGP9100/M",
 478         },
 479         {
 480                 .device_id      = PCI_DEVICE_ID_ATI_RS300_166,
 481                 .chipset_name   = "IGP9100/M",
 482         },
 483         {
 484                 .device_id      = PCI_DEVICE_ID_ATI_RS300_200,
 485                 .chipset_name   = "IGP9100/M",
 486         },
 487         {
 488                 .device_id      = PCI_DEVICE_ID_ATI_RS350_133,
 489                 .chipset_name   = "IGP9000/M",
 490         },
 491         {
 492                 .device_id      = PCI_DEVICE_ID_ATI_RS350_200,
 493                 .chipset_name   = "IGP9100/M",
 494         },
 495         { }, /* dummy final entry, always present */
 496 };
 497
 498 static int agp_ati_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 499 {
 500         struct agp_device_ids *devs = ati_agp_device_ids;
 501         struct agp_bridge_data *bridge;
 502         u8 cap_ptr;
 503         int j;
 504
 505         cap_ptr = pci_find_capability(pdev, PCI_CAP_ID_AGP);
 506         if (!cap_ptr)
 507                 return -ENODEV;
 508
 509         /* probe for known chipsets */
 510         for (j = 0; devs[j].chipset_name; j++) {
 511                 if (pdev->device == devs[j].device_id)
 512                         goto found;
 513         }
 514
 515         dev_err(&pdev->dev, "unsupported Ati chipset [%04x/%04x])\n",
 516                 pdev->vendor, pdev->device);
 517         return -ENODEV;
 518
 519 found:
 520         bridge = agp_alloc_bridge();
 521         if (!bridge)
 522                 return -ENOMEM;
 523
 524         bridge->dev = pdev;
 525         bridge->capndx = cap_ptr;
 526
 527         bridge->driver = &ati_generic_bridge;
 528
 529         dev_info(&pdev->dev, "Ati %s chipset\n", devs[j].chipset_name);
 530
 531         /* Fill in the mode register */
 532         pci_read_config_dword(pdev,
 533                         bridge->capndx+PCI_AGP_STATUS,
 534                         &bridge->mode);
 535
 536         pci_set_drvdata(pdev, bridge);
 537         return agp_add_bridge(bridge);
 538 }
 539
 540 static void agp_ati_remove(struct pci_dev *pdev)
 541 {
 542         struct agp_bridge_data *bridge = pci_get_drvdata(pdev);
 543
 544         agp_remove_bridge(bridge);
 545         agp_put_bridge(bridge);
 546 }
 547
 548 static const struct pci_device_id agp_ati_pci_table[] = {
 549         {
 550         .class          = (PCI_CLASS_BRIDGE_HOST << 8),
 551         .class_mask     = ~0,
 552         .vendor         = PCI_VENDOR_ID_ATI,
 553         .device         = PCI_ANY_ID,
 554         .subvendor      = PCI_ANY_ID,
 555         .subdevice      = PCI_ANY_ID,
 556         },
 557         { }
 558 };
 559
 560 MODULE_DEVICE_TABLE(pci, agp_ati_pci_table);
 561
 562 static struct pci_driver agp_ati_pci_driver = {
 563         .name           = "agpgart-ati",
 564         .id_table       = agp_ati_pci_table,
 565         .probe          = agp_ati_probe,
 566         .remove         = agp_ati_remove,
 567 #ifdef CONFIG_PM
 568         .suspend        = agp_ati_suspend,
 569         .resume         = agp_ati_resume,
 570 #endif
 571 };
 572
 573 static int __init agp_ati_init(void)
 574 {
 575         if (agp_off)
 576                 return -EINVAL;
 577         return pci_register_driver(&agp_ati_pci_driver);
 578 }
 579
 580 static void __exit agp_ati_cleanup(void)
 581 {
 582         pci_unregister_driver(&agp_ati_pci_driver);
 583 }
 584
 585 module_init(agp_ati_init);
 586 module_exit(agp_ati_cleanup);
 587
 588 MODULE_AUTHOR("Dave Jones");
 589 MODULE_LICENSE("GPL and additional rights");
 590