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
  45 typedef struct _ati_page_map {
  46         unsigned long *real;
  47         unsigned long __iomem *remapped;
  48 } ati_page_map;
  49
  50 static struct _ati_generic_private {
  51         volatile u8 __iomem *registers;
  52         ati_page_map **gatt_pages;
  53         int num_tables;
  54 } ati_generic_private;
  55
  56 static int ati_create_page_map(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         SetPageReserved(virt_to_page(page_map->real));
  65         err = map_page_into_agp(virt_to_page(page_map->real));
  66         page_map->remapped = ioremap_nocache(virt_to_gart(page_map->real),
  67                                             PAGE_SIZE);
  68         if (page_map->remapped == NULL || err) {
  69                 ClearPageReserved(virt_to_page(page_map->real));
  70                 free_page((unsigned long) page_map->real);
  71                 page_map->real = NULL;
  72                 return -ENOMEM;
  73         }
  74         /*CACHE_FLUSH();*/
  75         global_cache_flush();
  76
  77         for(i = 0; i < PAGE_SIZE / sizeof(unsigned long); i++) {
  78                 writel(agp_bridge->scratch_page, page_map->remapped+i);
  79                 readl(page_map->remapped+i);    /* PCI Posting. */
  80         }
  81
  82         return 0;
  83 }
  84
  85
  86 static void ati_free_page_map(ati_page_map *page_map)
  87 {
  88         unmap_page_from_agp(virt_to_page(page_map->real));
  89         iounmap(page_map->remapped);
  90         ClearPageReserved(virt_to_page(page_map->real));
  91         free_page((unsigned long) page_map->real);
  92 }
  93
  94
  95 static void ati_free_gatt_pages(void)
  96 {
  97         int i;
  98         ati_page_map **tables;
  99         ati_page_map *entry;
 100
 101         tables = ati_generic_private.gatt_pages;
 102         for(i = 0; i < ati_generic_private.num_tables; i++) {
 103                 entry = tables[i];
 104                 if (entry != NULL) {
 105                         if (entry->real != NULL)
 106                                 ati_free_page_map(entry);
 107                         kfree(entry);
 108                 }
 109         }
 110         kfree(tables);
 111 }
 112
 113
 114 static int ati_create_gatt_pages(int nr_tables)
 115 {
 116         ati_page_map **tables;
 117         ati_page_map *entry;
 118         int retval = 0;
 119         int i;
 120
 121         tables = kmalloc((nr_tables + 1) * sizeof(ati_page_map *),
 122                          GFP_KERNEL);
 123         if (tables == NULL)
 124                 return -ENOMEM;
 125
 126         memset(tables, 0, sizeof(ati_page_map *) * (nr_tables + 1));
 127         for (i = 0; i < nr_tables; i++) {
 128                 entry = kmalloc(sizeof(ati_page_map), GFP_KERNEL);
 129                 if (entry == NULL) {
 130                         while (i>0) {
 131                                 kfree (tables[i-1]);
 132                                 i--;
 133                         }
 134                         kfree (tables);
 135                         tables = NULL;
 136                         retval = -ENOMEM;
 137                         break;
 138                 }
 139                 memset(entry, 0, sizeof(ati_page_map));
 140                 tables[i] = entry;
 141                 retval = ati_create_page_map(entry);
 142                 if (retval != 0) break;
 143         }
 144         ati_generic_private.num_tables = nr_tables;
 145         ati_generic_private.gatt_pages = tables;
 146
 147         if (retval != 0) ati_free_gatt_pages();
 148
 149         return retval;
 150 }
 151
 152 static int is_r200(void)
 153 {
 154         if ((agp_bridge->dev->device == PCI_DEVICE_ID_ATI_RS100) ||
 155             (agp_bridge->dev->device == PCI_DEVICE_ID_ATI_RS200) ||
 156             (agp_bridge->dev->device == PCI_DEVICE_ID_ATI_RS200_B) ||
 157             (agp_bridge->dev->device == PCI_DEVICE_ID_ATI_RS250))
 158                 return 1;
 159         return 0;
 160 }
 161
 162 static int ati_fetch_size(void)
 163 {
 164         int i;
 165         u32 temp;
 166         struct aper_size_info_lvl2 *values;
 167
 168         if (is_r200())
 169                 pci_read_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, &temp);
 170         else
 171                 pci_read_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, &temp);
 172
 173         temp = (temp & 0x0000000e);
 174         values = A_SIZE_LVL2(agp_bridge->driver->aperture_sizes);
 175         for (i = 0; i < agp_bridge->driver->num_aperture_sizes; i++) {
 176                 if (temp == values[i].size_value) {
 177                         agp_bridge->previous_size =
 178                             agp_bridge->current_size = (void *) (values + i);
 179
 180                         agp_bridge->aperture_size_idx = i;
 181                         return values[i].size;
 182                 }
 183         }
 184
 185         return 0;
 186 }
 187
 188 static void ati_tlbflush(struct agp_memory * mem)
 189 {
 190         writel(1, ati_generic_private.registers+ATI_GART_CACHE_CNTRL);
 191         readl(ati_generic_private.registers+ATI_GART_CACHE_CNTRL);      /* PCI Posting. */
 192 }
 193
 194 static void ati_cleanup(void)
 195 {
 196         struct aper_size_info_lvl2 *previous_size;
 197         u32 temp;
 198
 199         previous_size = A_SIZE_LVL2(agp_bridge->previous_size);
 200
 201         /* Write back the previous size and disable gart translation */
 202         if (is_r200()) {
 203                 pci_read_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, &temp);
 204                 temp = ((temp & ~(0x0000000f)) | previous_size->size_value);
 205                 pci_write_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, temp);
 206         } else {
 207                 pci_read_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, &temp);
 208                 temp = ((temp & ~(0x0000000f)) | previous_size->size_value);
 209                 pci_write_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, temp);
 210         }
 211         iounmap((volatile u8 __iomem *)ati_generic_private.registers);
 212 }
 213
 214
 215 static int ati_configure(void)
 216 {
 217         u32 temp;
 218
 219         /* Get the memory mapped registers */
 220         pci_read_config_dword(agp_bridge->dev, ATI_GART_MMBASE_ADDR, &temp);
 221         temp = (temp & 0xfffff000);
 222         ati_generic_private.registers = (volatile u8 __iomem *) ioremap(temp, 4096);
 223
 224         if (is_r200())
 225         pci_write_config_dword(agp_bridge->dev, ATI_RS100_IG_AGPMODE, 0x20000);
 226         else
 227                 pci_write_config_dword(agp_bridge->dev, ATI_RS300_IG_AGPMODE, 0x20000);
 228
 229         /* address to map too */
 230         /*
 231         pci_read_config_dword(agp_bridge.dev, AGP_APBASE, &temp);
 232         agp_bridge.gart_bus_addr = (temp & PCI_BASE_ADDRESS_MEM_MASK);
 233         printk(KERN_INFO PFX "IGP320 gart_bus_addr: %x\n", agp_bridge.gart_bus_addr);
 234         */
 235         writel(0x60000, ati_generic_private.registers+ATI_GART_FEATURE_ID);
 236         readl(ati_generic_private.registers+ATI_GART_FEATURE_ID);       /* PCI Posting.*/
 237
 238         /* SIGNALED_SYSTEM_ERROR @ NB_STATUS */
 239         pci_read_config_dword(agp_bridge->dev, 4, &temp);
 240         pci_write_config_dword(agp_bridge->dev, 4, temp | (1<<14));
 241
 242         /* Write out the address of the gatt table */
 243         writel(agp_bridge->gatt_bus_addr, ati_generic_private.registers+ATI_GART_BASE);
 244         readl(ati_generic_private.registers+ATI_GART_BASE);     /* PCI Posting. */
 245
 246         return 0;
 247 }
 248
 249
 250 /*
 251  *Since we don't need contigious memory we just try
 252  * to get the gatt table once
 253  */
 254
 255 #define GET_PAGE_DIR_OFF(addr) (addr >> 22)
 256 #define GET_PAGE_DIR_IDX(addr) (GET_PAGE_DIR_OFF(addr) - \
 257         GET_PAGE_DIR_OFF(agp_bridge->gart_bus_addr))
 258 #define GET_GATT_OFF(addr) ((addr & 0x003ff000) >> 12)
 259 #undef  GET_GATT
 260 #define GET_GATT(addr) (ati_generic_private.gatt_pages[\
 261         GET_PAGE_DIR_IDX(addr)]->remapped)
 262
 263 static int ati_insert_memory(struct agp_memory * mem,
 264                              off_t pg_start, int type)
 265 {
 266         int i, j, num_entries;
 267         unsigned long __iomem *cur_gatt;
 268         unsigned long addr;
 269
 270         num_entries = A_SIZE_LVL2(agp_bridge->current_size)->num_entries;
 271
 272         if (type != 0 || mem->type != 0)
 273                 return -EINVAL;
 274
 275         if ((pg_start + mem->page_count) > num_entries)
 276                 return -EINVAL;
 277
 278         j = pg_start;
 279         while (j < (pg_start + mem->page_count)) {
 280                 addr = (j * PAGE_SIZE) + agp_bridge->gart_bus_addr;
 281                 cur_gatt = GET_GATT(addr);
 282                 if (!PGE_EMPTY(agp_bridge,readl(cur_gatt+GET_GATT_OFF(addr))))
 283                         return -EBUSY;
 284                 j++;
 285         }
 286
 287         if (mem->is_flushed == FALSE) {
 288                 /*CACHE_FLUSH(); */
 289                 global_cache_flush();
 290                 mem->is_flushed = TRUE;
 291         }
 292
 293         for (i = 0, j = pg_start; i < mem->page_count; i++, j++) {
 294                 addr = (j * PAGE_SIZE) + agp_bridge->gart_bus_addr;
 295                 cur_gatt = GET_GATT(addr);
 296                 writel(agp_bridge->driver->mask_memory(agp_bridge,
 297                         mem->memory[i], mem->type), cur_gatt+GET_GATT_OFF(addr));
 298                 readl(cur_gatt+GET_GATT_OFF(addr));     /* PCI Posting. */
 299         }
 300         agp_bridge->driver->tlb_flush(mem);
 301         return 0;
 302 }
 303
 304 static int ati_remove_memory(struct agp_memory * mem, off_t pg_start,
 305                              int type)
 306 {
 307         int i;
 308         unsigned long __iomem *cur_gatt;
 309         unsigned long addr;
 310
 311         if (type != 0 || mem->type != 0) {
 312                 return -EINVAL;
 313         }
 314         for (i = pg_start; i < (mem->page_count + pg_start); i++) {
 315                 addr = (i * PAGE_SIZE) + agp_bridge->gart_bus_addr;
 316                 cur_gatt = GET_GATT(addr);
 317                 writel(agp_bridge->scratch_page, cur_gatt+GET_GATT_OFF(addr));
 318                 readl(cur_gatt+GET_GATT_OFF(addr)); /* PCI Posting. */
 319         }
 320
 321         agp_bridge->driver->tlb_flush(mem);
 322         return 0;
 323 }
 324
 325 static int ati_create_gatt_table(struct agp_bridge_data *bridge)
 326 {
 327         struct aper_size_info_lvl2 *value;
 328         ati_page_map page_dir;
 329         unsigned long addr;
 330         int retval;
 331         u32 temp;
 332         int i;
 333         struct aper_size_info_lvl2 *current_size;
 334
 335         value = A_SIZE_LVL2(agp_bridge->current_size);
 336         retval = ati_create_page_map(&page_dir);
 337         if (retval != 0)
 338                 return retval;
 339
 340         retval = ati_create_gatt_pages(value->num_entries / 1024);
 341         if (retval != 0) {
 342                 ati_free_page_map(&page_dir);
 343                 return retval;
 344         }
 345
 346         agp_bridge->gatt_table_real = (u32 *)page_dir.real;
 347         agp_bridge->gatt_table = (u32 __iomem *) page_dir.remapped;
 348         agp_bridge->gatt_bus_addr = virt_to_gart(page_dir.real);
 349
 350         /* Write out the size register */
 351         current_size = A_SIZE_LVL2(agp_bridge->current_size);
 352
 353         if (is_r200()) {
 354                 pci_read_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, &temp);
 355                 temp = (((temp & ~(0x0000000e)) | current_size->size_value)
 356                         | 0x00000001);
 357                 pci_write_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, temp);
 358                 pci_read_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, &temp);
 359         } else {
 360                 pci_read_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, &temp);
 361                 temp = (((temp & ~(0x0000000e)) | current_size->size_value)
 362                         | 0x00000001);
 363                 pci_write_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, temp);
 364                 pci_read_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, &temp);
 365         }
 366
 367         /*
 368          * Get the address for the gart region.
 369          * This is a bus address even on the alpha, b/c its
 370          * used to program the agp master not the cpu
 371          */
 372         pci_read_config_dword(agp_bridge->dev, AGP_APBASE, &temp);
 373         addr = (temp & PCI_BASE_ADDRESS_MEM_MASK);
 374         agp_bridge->gart_bus_addr = addr;
 375
 376         /* Calculate the agp offset */
 377         for(i = 0; i < value->num_entries / 1024; i++, addr += 0x00400000) {
 378                 writel(virt_to_gart(ati_generic_private.gatt_pages[i]->real) | 1,
 379                         page_dir.remapped+GET_PAGE_DIR_OFF(addr));
 380                 readl(page_dir.remapped+GET_PAGE_DIR_OFF(addr));        /* PCI Posting. */
 381         }
 382
 383         return 0;
 384 }
 385
 386 static int ati_free_gatt_table(struct agp_bridge_data *bridge)
 387 {
 388         ati_page_map page_dir;
 389
 390         page_dir.real = (unsigned long *)agp_bridge->gatt_table_real;
 391         page_dir.remapped = (unsigned long __iomem *)agp_bridge->gatt_table;
 392
 393         ati_free_gatt_pages();
 394         ati_free_page_map(&page_dir);
 395         return 0;
 396 }
 397
 398 static struct agp_bridge_driver ati_generic_bridge = {
 399         .owner                  = THIS_MODULE,
 400         .aperture_sizes         = ati_generic_sizes,
 401         .size_type              = LVL2_APER_SIZE,
 402         .num_aperture_sizes     = 7,
 403         .configure              = ati_configure,
 404         .fetch_size             = ati_fetch_size,
 405         .cleanup                = ati_cleanup,
 406         .tlb_flush              = ati_tlbflush,
 407         .mask_memory            = agp_generic_mask_memory,
 408         .masks                  = ati_generic_masks,
 409         .agp_enable             = agp_generic_enable,
 410         .cache_flush            = global_cache_flush,
 411         .create_gatt_table      = ati_create_gatt_table,
 412         .free_gatt_table        = ati_free_gatt_table,
 413         .insert_memory          = ati_insert_memory,
 414         .remove_memory          = ati_remove_memory,
 415         .alloc_by_type          = agp_generic_alloc_by_type,
 416         .free_by_type           = agp_generic_free_by_type,
 417         .agp_alloc_page         = agp_generic_alloc_page,
 418         .agp_destroy_page       = agp_generic_destroy_page,
 419 };
 420
 421
 422 static struct agp_device_ids ati_agp_device_ids[] __devinitdata =
 423 {
 424         {
 425                 .device_id      = PCI_DEVICE_ID_ATI_RS100,
 426                 .chipset_name   = "IGP320/M",
 427         },
 428         {
 429                 .device_id      = PCI_DEVICE_ID_ATI_RS200,
 430                 .chipset_name   = "IGP330/340/345/350/M",
 431         },
 432         {
 433                 .device_id      = PCI_DEVICE_ID_ATI_RS200_B,
 434                 .chipset_name   = "IGP345M",
 435         },
 436         {
 437                 .device_id      = PCI_DEVICE_ID_ATI_RS250,
 438                 .chipset_name   = "IGP7000/M",
 439         },
 440         {
 441                 .device_id      = PCI_DEVICE_ID_ATI_RS300_100,
 442                 .chipset_name   = "IGP9100/M",
 443         },
 444         {
 445                 .device_id      = PCI_DEVICE_ID_ATI_RS300_133,
 446                 .chipset_name   = "IGP9100/M",
 447         },
 448         {
 449                 .device_id      = PCI_DEVICE_ID_ATI_RS300_166,
 450                 .chipset_name   = "IGP9100/M",
 451         },
 452         {
 453                 .device_id      = PCI_DEVICE_ID_ATI_RS300_200,
 454                 .chipset_name   = "IGP9100/M",
 455         },
 456         { }, /* dummy final entry, always present */
 457 };
 458
 459 static int __devinit agp_ati_probe(struct pci_dev *pdev,
 460                                    const struct pci_device_id *ent)
 461 {
 462         struct agp_device_ids *devs = ati_agp_device_ids;
 463         struct agp_bridge_data *bridge;
 464         u8 cap_ptr;
 465         int j;
 466
 467         cap_ptr = pci_find_capability(pdev, PCI_CAP_ID_AGP);
 468         if (!cap_ptr)
 469                 return -ENODEV;
 470
 471         /* probe for known chipsets */
 472         for (j = 0; devs[j].chipset_name; j++) {
 473                 if (pdev->device == devs[j].device_id)
 474                         goto found;
 475         }
 476
 477         printk(KERN_ERR PFX
 478              "Unsupported Ati chipset (device id: %04x)\n", pdev->device);
 479         return -ENODEV;
 480
 481 found:
 482         bridge = agp_alloc_bridge();
 483         if (!bridge)
 484                 return -ENOMEM;
 485
 486         bridge->dev = pdev;
 487         bridge->capndx = cap_ptr;
 488
 489         bridge->driver = &ati_generic_bridge;
 490
 491
 492         printk(KERN_INFO PFX "Detected Ati %s chipset\n",
 493                         devs[j].chipset_name);
 494
 495         /* Fill in the mode register */
 496         pci_read_config_dword(pdev,
 497                         bridge->capndx+PCI_AGP_STATUS,
 498                         &bridge->mode);
 499
 500         pci_set_drvdata(pdev, bridge);
 501         return agp_add_bridge(bridge);
 502 }
 503
 504 static void __devexit agp_ati_remove(struct pci_dev *pdev)
 505 {
 506         struct agp_bridge_data *bridge = pci_get_drvdata(pdev);
 507
 508         agp_remove_bridge(bridge);
 509         agp_put_bridge(bridge);
 510 }
 511
 512 static struct pci_device_id agp_ati_pci_table[] = {
 513         {
 514         .class          = (PCI_CLASS_BRIDGE_HOST << 8),
 515         .class_mask     = ~0,
 516         .vendor         = PCI_VENDOR_ID_ATI,
 517         .device         = PCI_ANY_ID,
 518         .subvendor      = PCI_ANY_ID,
 519         .subdevice      = PCI_ANY_ID,
 520         },
 521         { }
 522 };
 523
 524 MODULE_DEVICE_TABLE(pci, agp_ati_pci_table);
 525
 526 static struct pci_driver agp_ati_pci_driver = {
 527         .name           = "agpgart-ati",
 528         .id_table       = agp_ati_pci_table,
 529         .probe          = agp_ati_probe,
 530         .remove         = agp_ati_remove,
 531 };
 532
 533 static int __init agp_ati_init(void)
 534 {
 535         if (agp_off)
 536                 return -EINVAL;
 537         return pci_register_driver(&agp_ati_pci_driver);
 538 }
 539
 540 static void __exit agp_ati_cleanup(void)
 541 {
 542         pci_unregister_driver(&agp_ati_pci_driver);
 543 }
 544
 545 module_init(agp_ati_init);
 546 module_exit(agp_ati_cleanup);
 547
 548 MODULE_AUTHOR("Dave Jones <davej@codemonkey.org.uk>");
 549 MODULE_LICENSE("GPL and additional rights");
 550