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 "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 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 typedef struct _ati_page_map {
  45         unsigned long *real;
  46         unsigned long __iomem *remapped;
  47 } ati_page_map;
  48
  49 static struct _ati_generic_private {
  50         volatile u8 __iomem *registers;
  51         ati_page_map **gatt_pages;
  52         int num_tables;
  53 } ati_generic_private;
  54
  55 static int ati_create_page_map(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         SetPageReserved(virt_to_page(page_map->real));
  64         err = map_page_into_agp(virt_to_page(page_map->real));
  65         page_map->remapped = ioremap_nocache(virt_to_gart(page_map->real),
  66                                             PAGE_SIZE);
  67         if (page_map->remapped == NULL || err) {
  68                 ClearPageReserved(virt_to_page(page_map->real));
  69                 free_page((unsigned long) page_map->real);
  70                 page_map->real = NULL;
  71                 return -ENOMEM;
  72         }
  73         /*CACHE_FLUSH();*/
  74         global_cache_flush();
  75
  76         for (i = 0; i < PAGE_SIZE / sizeof(unsigned long); i++) {
  77                 writel(agp_bridge->scratch_page, page_map->remapped+i);
  78                 readl(page_map->remapped+i);    /* PCI Posting. */
  79         }
  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 = kzalloc((nr_tables + 1) * sizeof(ati_page_map *),GFP_KERNEL);
 121         if (tables == NULL)
 122                 return -ENOMEM;
 123
 124         for (i = 0; i < nr_tables; i++) {
 125                 entry = kzalloc(sizeof(ati_page_map), GFP_KERNEL);
 126                 if (entry == NULL) {
 127                         while (i>0) {
 128                                 kfree (tables[i-1]);
 129                                 i--;
 130                         }
 131                         kfree (tables);
 132                         tables = NULL;
 133                         retval = -ENOMEM;
 134                         break;
 135                 }
 136                 tables[i] = entry;
 137                 retval = ati_create_page_map(entry);
 138                 if (retval != 0) break;
 139         }
 140         ati_generic_private.num_tables = nr_tables;
 141         ati_generic_private.gatt_pages = tables;
 142
 143         if (retval != 0)
 144                 ati_free_gatt_pages();
 145
 146         return retval;
 147 }
 148
 149 static int is_r200(void)
 150 {
 151         if ((agp_bridge->dev->device == PCI_DEVICE_ID_ATI_RS100) ||
 152             (agp_bridge->dev->device == PCI_DEVICE_ID_ATI_RS200) ||
 153             (agp_bridge->dev->device == PCI_DEVICE_ID_ATI_RS200_B) ||
 154             (agp_bridge->dev->device == PCI_DEVICE_ID_ATI_RS250))
 155                 return 1;
 156         return 0;
 157 }
 158
 159 static int ati_fetch_size(void)
 160 {
 161         int i;
 162         u32 temp;
 163         struct aper_size_info_lvl2 *values;
 164
 165         if (is_r200())
 166                 pci_read_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, &temp);
 167         else
 168                 pci_read_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, &temp);
 169
 170         temp = (temp & 0x0000000e);
 171         values = A_SIZE_LVL2(agp_bridge->driver->aperture_sizes);
 172         for (i = 0; i < agp_bridge->driver->num_aperture_sizes; i++) {
 173                 if (temp == values[i].size_value) {
 174                         agp_bridge->previous_size =
 175                             agp_bridge->current_size = (void *) (values + i);
 176
 177                         agp_bridge->aperture_size_idx = i;
 178                         return values[i].size;
 179                 }
 180         }
 181
 182         return 0;
 183 }
 184
 185 static void ati_tlbflush(struct agp_memory * mem)
 186 {
 187         writel(1, ati_generic_private.registers+ATI_GART_CACHE_CNTRL);
 188         readl(ati_generic_private.registers+ATI_GART_CACHE_CNTRL);      /* PCI Posting. */
 189 }
 190
 191 static void ati_cleanup(void)
 192 {
 193         struct aper_size_info_lvl2 *previous_size;
 194         u32 temp;
 195
 196         previous_size = A_SIZE_LVL2(agp_bridge->previous_size);
 197
 198         /* Write back the previous size and disable gart translation */
 199         if (is_r200()) {
 200                 pci_read_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, &temp);
 201                 temp = ((temp & ~(0x0000000f)) | previous_size->size_value);
 202                 pci_write_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, temp);
 203         } else {
 204                 pci_read_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, &temp);
 205                 temp = ((temp & ~(0x0000000f)) | previous_size->size_value);
 206                 pci_write_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, temp);
 207         }
 208         iounmap((volatile u8 __iomem *)ati_generic_private.registers);
 209 }
 210
 211
 212 static int ati_configure(void)
 213 {
 214         u32 temp;
 215
 216         /* Get the memory mapped registers */
 217         pci_read_config_dword(agp_bridge->dev, ATI_GART_MMBASE_ADDR, &temp);
 218         temp = (temp & 0xfffff000);
 219         ati_generic_private.registers = (volatile u8 __iomem *) ioremap(temp, 4096);
 220
 221         if (is_r200())
 222                 pci_write_config_dword(agp_bridge->dev, ATI_RS100_IG_AGPMODE, 0x20000);
 223         else
 224                 pci_write_config_dword(agp_bridge->dev, ATI_RS300_IG_AGPMODE, 0x20000);
 225
 226         /* address to map too */
 227         /*
 228         pci_read_config_dword(agp_bridge.dev, AGP_APBASE, &temp);
 229         agp_bridge.gart_bus_addr = (temp & PCI_BASE_ADDRESS_MEM_MASK);
 230         printk(KERN_INFO PFX "IGP320 gart_bus_addr: %x\n", agp_bridge.gart_bus_addr);
 231         */
 232         writel(0x60000, ati_generic_private.registers+ATI_GART_FEATURE_ID);
 233         readl(ati_generic_private.registers+ATI_GART_FEATURE_ID);       /* PCI Posting.*/
 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         writel(agp_bridge->gatt_bus_addr, ati_generic_private.registers+ATI_GART_BASE);
 241         readl(ati_generic_private.registers+ATI_GART_BASE);     /* PCI Posting. */
 242
 243         return 0;
 244 }
 245
 246
 247 #ifdef CONFIG_PM
 248 static int agp_ati_suspend(struct pci_dev *dev, pm_message_t state)
 249 {
 250         pci_save_state(dev);
 251         pci_set_power_state(dev, 3);
 252
 253         return 0;
 254 }
 255
 256 static int agp_ati_resume(struct pci_dev *dev)
 257 {
 258         pci_set_power_state(dev, 0);
 259         pci_restore_state(dev);
 260
 261         return ati_configure();
 262 }
 263 #endif
 264
 265 /*
 266  *Since we don't need contiguous memory we just try
 267  * to get the gatt table once
 268  */
 269
 270 #define GET_PAGE_DIR_OFF(addr) (addr >> 22)
 271 #define GET_PAGE_DIR_IDX(addr) (GET_PAGE_DIR_OFF(addr) - \
 272         GET_PAGE_DIR_OFF(agp_bridge->gart_bus_addr))
 273 #define GET_GATT_OFF(addr) ((addr & 0x003ff000) >> 12)
 274 #undef  GET_GATT
 275 #define GET_GATT(addr) (ati_generic_private.gatt_pages[\
 276         GET_PAGE_DIR_IDX(addr)]->remapped)
 277
 278 static int ati_insert_memory(struct agp_memory * mem,
 279                              off_t pg_start, int type)
 280 {
 281         int i, j, num_entries;
 282         unsigned long __iomem *cur_gatt;
 283         unsigned long addr;
 284
 285         num_entries = A_SIZE_LVL2(agp_bridge->current_size)->num_entries;
 286
 287         if (type != 0 || mem->type != 0)
 288                 return -EINVAL;
 289
 290         if ((pg_start + mem->page_count) > num_entries)
 291                 return -EINVAL;
 292
 293         j = pg_start;
 294         while (j < (pg_start + mem->page_count)) {
 295                 addr = (j * PAGE_SIZE) + agp_bridge->gart_bus_addr;
 296                 cur_gatt = GET_GATT(addr);
 297                 if (!PGE_EMPTY(agp_bridge,readl(cur_gatt+GET_GATT_OFF(addr))))
 298                         return -EBUSY;
 299                 j++;
 300         }
 301
 302         if (mem->is_flushed == FALSE) {
 303                 /*CACHE_FLUSH(); */
 304                 global_cache_flush();
 305                 mem->is_flushed = TRUE;
 306         }
 307
 308         for (i = 0, j = pg_start; i < mem->page_count; i++, j++) {
 309                 addr = (j * PAGE_SIZE) + agp_bridge->gart_bus_addr;
 310                 cur_gatt = GET_GATT(addr);
 311                 writel(agp_bridge->driver->mask_memory(agp_bridge,
 312                         mem->memory[i], mem->type), cur_gatt+GET_GATT_OFF(addr));
 313                 readl(cur_gatt+GET_GATT_OFF(addr));     /* PCI Posting. */
 314         }
 315         agp_bridge->driver->tlb_flush(mem);
 316         return 0;
 317 }
 318
 319 static int ati_remove_memory(struct agp_memory * mem, off_t pg_start,
 320                              int type)
 321 {
 322         int i;
 323         unsigned long __iomem *cur_gatt;
 324         unsigned long addr;
 325
 326         if (type != 0 || mem->type != 0)
 327                 return -EINVAL;
 328
 329         for (i = pg_start; i < (mem->page_count + pg_start); i++) {
 330                 addr = (i * PAGE_SIZE) + agp_bridge->gart_bus_addr;
 331                 cur_gatt = GET_GATT(addr);
 332                 writel(agp_bridge->scratch_page, cur_gatt+GET_GATT_OFF(addr));
 333                 readl(cur_gatt+GET_GATT_OFF(addr)); /* PCI Posting. */
 334         }
 335
 336         agp_bridge->driver->tlb_flush(mem);
 337         return 0;
 338 }
 339
 340 static int ati_create_gatt_table(struct agp_bridge_data *bridge)
 341 {
 342         struct aper_size_info_lvl2 *value;
 343         ati_page_map page_dir;
 344         unsigned long addr;
 345         int retval;
 346         u32 temp;
 347         int i;
 348         struct aper_size_info_lvl2 *current_size;
 349
 350         value = A_SIZE_LVL2(agp_bridge->current_size);
 351         retval = ati_create_page_map(&page_dir);
 352         if (retval != 0)
 353                 return retval;
 354
 355         retval = ati_create_gatt_pages(value->num_entries / 1024);
 356         if (retval != 0) {
 357                 ati_free_page_map(&page_dir);
 358                 return retval;
 359         }
 360
 361         agp_bridge->gatt_table_real = (u32 *)page_dir.real;
 362         agp_bridge->gatt_table = (u32 __iomem *) page_dir.remapped;
 363         agp_bridge->gatt_bus_addr = virt_to_gart(page_dir.real);
 364
 365         /* Write out the size register */
 366         current_size = A_SIZE_LVL2(agp_bridge->current_size);
 367
 368         if (is_r200()) {
 369                 pci_read_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, &temp);
 370                 temp = (((temp & ~(0x0000000e)) | current_size->size_value)
 371                         | 0x00000001);
 372                 pci_write_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, temp);
 373                 pci_read_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, &temp);
 374         } else {
 375                 pci_read_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, &temp);
 376                 temp = (((temp & ~(0x0000000e)) | current_size->size_value)
 377                         | 0x00000001);
 378                 pci_write_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, temp);
 379                 pci_read_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, &temp);
 380         }
 381
 382         /*
 383          * Get the address for the gart region.
 384          * This is a bus address even on the alpha, b/c its
 385          * used to program the agp master not the cpu
 386          */
 387         pci_read_config_dword(agp_bridge->dev, AGP_APBASE, &temp);
 388         addr = (temp & PCI_BASE_ADDRESS_MEM_MASK);
 389         agp_bridge->gart_bus_addr = addr;
 390
 391         /* Calculate the agp offset */
 392         for (i = 0; i < value->num_entries / 1024; i++, addr += 0x00400000) {
 393                 writel(virt_to_gart(ati_generic_private.gatt_pages[i]->real) | 1,
 394                         page_dir.remapped+GET_PAGE_DIR_OFF(addr));
 395                 readl(page_dir.remapped+GET_PAGE_DIR_OFF(addr));        /* PCI Posting. */
 396         }
 397
 398         return 0;
 399 }
 400
 401 static int ati_free_gatt_table(struct agp_bridge_data *bridge)
 402 {
 403         ati_page_map page_dir;
 404
 405         page_dir.real = (unsigned long *)agp_bridge->gatt_table_real;
 406         page_dir.remapped = (unsigned long __iomem *)agp_bridge->gatt_table;
 407
 408         ati_free_gatt_pages();
 409         ati_free_page_map(&page_dir);
 410         return 0;
 411 }
 412
 413 static struct agp_bridge_driver ati_generic_bridge = {
 414         .owner                  = THIS_MODULE,
 415         .aperture_sizes         = ati_generic_sizes,
 416         .size_type              = LVL2_APER_SIZE,
 417         .num_aperture_sizes     = 7,
 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_destroy_page       = agp_generic_destroy_page,
 434 };
 435
 436
 437 static struct agp_device_ids ati_agp_device_ids[] __devinitdata =
 438 {
 439         {
 440                 .device_id      = PCI_DEVICE_ID_ATI_RS100,
 441                 .chipset_name   = "IGP320/M",
 442         },
 443         {
 444                 .device_id      = PCI_DEVICE_ID_ATI_RS200,
 445                 .chipset_name   = "IGP330/340/345/350/M",
 446         },
 447         {
 448                 .device_id      = PCI_DEVICE_ID_ATI_RS200_B,
 449                 .chipset_name   = "IGP345M",
 450         },
 451         {
 452                 .device_id      = PCI_DEVICE_ID_ATI_RS250,
 453                 .chipset_name   = "IGP7000/M",
 454         },
 455         {
 456                 .device_id      = PCI_DEVICE_ID_ATI_RS300_100,
 457                 .chipset_name   = "IGP9100/M",
 458         },
 459         {
 460                 .device_id      = PCI_DEVICE_ID_ATI_RS300_133,
 461                 .chipset_name   = "IGP9100/M",
 462         },
 463         {
 464                 .device_id      = PCI_DEVICE_ID_ATI_RS300_166,
 465                 .chipset_name   = "IGP9100/M",
 466         },
 467         {
 468                 .device_id      = PCI_DEVICE_ID_ATI_RS300_200,
 469                 .chipset_name   = "IGP9100/M",
 470         },
 471         {
 472                 .device_id      = PCI_DEVICE_ID_ATI_RS350_200,
 473                 .chipset_name   = "IGP9100/M",
 474         },
 475         { }, /* dummy final entry, always present */
 476 };
 477
 478 static int __devinit agp_ati_probe(struct pci_dev *pdev,
 479                                    const struct pci_device_id *ent)
 480 {
 481         struct agp_device_ids *devs = ati_agp_device_ids;
 482         struct agp_bridge_data *bridge;
 483         u8 cap_ptr;
 484         int j;
 485
 486         cap_ptr = pci_find_capability(pdev, PCI_CAP_ID_AGP);
 487         if (!cap_ptr)
 488                 return -ENODEV;
 489
 490         /* probe for known chipsets */
 491         for (j = 0; devs[j].chipset_name; j++) {
 492                 if (pdev->device == devs[j].device_id)
 493                         goto found;
 494         }
 495
 496         printk(KERN_ERR PFX
 497              "Unsupported Ati chipset (device id: %04x)\n", pdev->device);
 498         return -ENODEV;
 499
 500 found:
 501         bridge = agp_alloc_bridge();
 502         if (!bridge)
 503                 return -ENOMEM;
 504
 505         bridge->dev = pdev;
 506         bridge->capndx = cap_ptr;
 507
 508         bridge->driver = &ati_generic_bridge;
 509
 510         printk(KERN_INFO PFX "Detected Ati %s chipset\n",
 511                         devs[j].chipset_name);
 512
 513         /* Fill in the mode register */
 514         pci_read_config_dword(pdev,
 515                         bridge->capndx+PCI_AGP_STATUS,
 516                         &bridge->mode);
 517
 518         pci_set_drvdata(pdev, bridge);
 519         return agp_add_bridge(bridge);
 520 }
 521
 522 static void __devexit agp_ati_remove(struct pci_dev *pdev)
 523 {
 524         struct agp_bridge_data *bridge = pci_get_drvdata(pdev);
 525
 526         agp_remove_bridge(bridge);
 527         agp_put_bridge(bridge);
 528 }
 529
 530 static struct pci_device_id agp_ati_pci_table[] = {
 531         {
 532         .class          = (PCI_CLASS_BRIDGE_HOST << 8),
 533         .class_mask     = ~0,
 534         .vendor         = PCI_VENDOR_ID_ATI,
 535         .device         = PCI_ANY_ID,
 536         .subvendor      = PCI_ANY_ID,
 537         .subdevice      = PCI_ANY_ID,
 538         },
 539         { }
 540 };
 541
 542 MODULE_DEVICE_TABLE(pci, agp_ati_pci_table);
 543
 544 static struct pci_driver agp_ati_pci_driver = {
 545         .name           = "agpgart-ati",
 546         .id_table       = agp_ati_pci_table,
 547         .probe          = agp_ati_probe,
 548         .remove         = agp_ati_remove,
 549 #ifdef CONFIG_PM
 550         .suspend        = agp_ati_suspend,
 551         .resume         = agp_ati_resume,
 552 #endif
 553 };
 554
 555 static int __init agp_ati_init(void)
 556 {
 557         if (agp_off)
 558                 return -EINVAL;
 559         return pci_register_driver(&agp_ati_pci_driver);
 560 }
 561
 562 static void __exit agp_ati_cleanup(void)
 563 {
 564         pci_unregister_driver(&agp_ati_pci_driver);
 565 }
 566
 567 module_init(agp_ati_init);
 568 module_exit(agp_ati_cleanup);
 569
 570 MODULE_AUTHOR("Dave Jones <davej@codemonkey.org.uk>");
 571 MODULE_LICENSE("GPL and additional rights");
 572