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 const 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 struct ati_page_map { 45 unsigned long *real; 46 unsigned long __iomem *remapped; 47 }; 48 49 static struct _ati_generic_private { 50 volatile u8 __iomem *registers; 51 struct ati_page_map **gatt_pages; 52 int num_tables; 53 } ati_generic_private; 54 55 static int ati_create_page_map(struct 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 set_memory_uc((unsigned long)page_map->real, 1); 64 err = map_page_into_agp(virt_to_page(page_map->real)); 65 page_map->remapped = page_map->real; 66 67 for (i = 0; i < PAGE_SIZE / sizeof(unsigned long); i++) { 68 writel(agp_bridge->scratch_page, page_map->remapped+i); 69 readl(page_map->remapped+i); /* PCI Posting. */ 70 } 71 72 return 0; 73 } 74 75 76 static void ati_free_page_map(struct ati_page_map *page_map) 77 { 78 unmap_page_from_agp(virt_to_page(page_map->real)); 79 set_memory_wb((unsigned long)page_map->real, 1); 80 free_page((unsigned long) page_map->real); 81 } 82 83 84 static void ati_free_gatt_pages(void) 85 { 86 int i; 87 struct ati_page_map **tables; 88 struct ati_page_map *entry; 89 90 tables = ati_generic_private.gatt_pages; 91 for (i = 0; i < ati_generic_private.num_tables; i++) { 92 entry = tables[i]; 93 if (entry != NULL) { 94 if (entry->real != NULL) 95 ati_free_page_map(entry); 96 kfree(entry); 97 } 98 } 99 kfree(tables); 100 } 101 102 103 static int ati_create_gatt_pages(int nr_tables) 104 { 105 struct ati_page_map **tables; 106 struct ati_page_map *entry; 107 int retval = 0; 108 int i; 109 110 tables = kzalloc((nr_tables + 1) * sizeof(struct ati_page_map *),GFP_KERNEL); 111 if (tables == NULL) 112 return -ENOMEM; 113 114 for (i = 0; i < nr_tables; i++) { 115 entry = kzalloc(sizeof(struct ati_page_map), GFP_KERNEL); 116 tables[i] = entry; 117 if (entry == NULL) { 118 retval = -ENOMEM; 119 break; 120 } 121 retval = ati_create_page_map(entry); 122 if (retval != 0) 123 break; 124 } 125 ati_generic_private.num_tables = i; 126 ati_generic_private.gatt_pages = tables; 127 128 if (retval != 0) 129 ati_free_gatt_pages(); 130 131 return retval; 132 } 133 134 static int is_r200(void) 135 { 136 if ((agp_bridge->dev->device == PCI_DEVICE_ID_ATI_RS100) || 137 (agp_bridge->dev->device == PCI_DEVICE_ID_ATI_RS200) || 138 (agp_bridge->dev->device == PCI_DEVICE_ID_ATI_RS200_B) || 139 (agp_bridge->dev->device == PCI_DEVICE_ID_ATI_RS250)) 140 return 1; 141 return 0; 142 } 143 144 static int ati_fetch_size(void) 145 { 146 int i; 147 u32 temp; 148 struct aper_size_info_lvl2 *values; 149 150 if (is_r200()) 151 pci_read_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, &temp); 152 else 153 pci_read_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, &temp); 154 155 temp = (temp & 0x0000000e); 156 values = A_SIZE_LVL2(agp_bridge->driver->aperture_sizes); 157 for (i = 0; i < agp_bridge->driver->num_aperture_sizes; i++) { 158 if (temp == values[i].size_value) { 159 agp_bridge->previous_size = 160 agp_bridge->current_size = (void *) (values + i); 161 162 agp_bridge->aperture_size_idx = i; 163 return values[i].size; 164 } 165 } 166 167 return 0; 168 } 169 170 static void ati_tlbflush(struct agp_memory * mem) 171 { 172 writel(1, ati_generic_private.registers+ATI_GART_CACHE_CNTRL); 173 readl(ati_generic_private.registers+ATI_GART_CACHE_CNTRL); /* PCI Posting. */ 174 } 175 176 static void ati_cleanup(void) 177 { 178 struct aper_size_info_lvl2 *previous_size; 179 u32 temp; 180 181 previous_size = A_SIZE_LVL2(agp_bridge->previous_size); 182 183 /* Write back the previous size and disable gart translation */ 184 if (is_r200()) { 185 pci_read_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, &temp); 186 temp = ((temp & ~(0x0000000f)) | previous_size->size_value); 187 pci_write_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, temp); 188 } else { 189 pci_read_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, &temp); 190 temp = ((temp & ~(0x0000000f)) | previous_size->size_value); 191 pci_write_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, temp); 192 } 193 iounmap((volatile u8 __iomem *)ati_generic_private.registers); 194 } 195 196 197 static int ati_configure(void) 198 { 199 u32 temp; 200 201 /* Get the memory mapped registers */ 202 pci_read_config_dword(agp_bridge->dev, ATI_GART_MMBASE_ADDR, &temp); 203 temp = (temp & 0xfffff000); 204 ati_generic_private.registers = (volatile u8 __iomem *) ioremap(temp, 4096); 205 206 if (!ati_generic_private.registers) 207 return -ENOMEM; 208 209 if (is_r200()) 210 pci_write_config_dword(agp_bridge->dev, ATI_RS100_IG_AGPMODE, 0x20000); 211 else 212 pci_write_config_dword(agp_bridge->dev, ATI_RS300_IG_AGPMODE, 0x20000); 213 214 /* address to map too */ 215 /* 216 pci_read_config_dword(agp_bridge.dev, AGP_APBASE, &temp); 217 agp_bridge.gart_bus_addr = (temp & PCI_BASE_ADDRESS_MEM_MASK); 218 printk(KERN_INFO PFX "IGP320 gart_bus_addr: %x\n", agp_bridge.gart_bus_addr); 219 */ 220 writel(0x60000, ati_generic_private.registers+ATI_GART_FEATURE_ID); 221 readl(ati_generic_private.registers+ATI_GART_FEATURE_ID); /* PCI Posting.*/ 222 223 /* SIGNALED_SYSTEM_ERROR @ NB_STATUS */ 224 pci_read_config_dword(agp_bridge->dev, 4, &temp); 225 pci_write_config_dword(agp_bridge->dev, 4, temp | (1<<14)); 226 227 /* Write out the address of the gatt table */ 228 writel(agp_bridge->gatt_bus_addr, ati_generic_private.registers+ATI_GART_BASE); 229 readl(ati_generic_private.registers+ATI_GART_BASE); /* PCI Posting. */ 230 231 return 0; 232 } 233 234 235 #ifdef CONFIG_PM 236 static int agp_ati_suspend(struct pci_dev *dev, pm_message_t state) 237 { 238 pci_save_state(dev); 239 pci_set_power_state(dev, 3); 240 241 return 0; 242 } 243 244 static int agp_ati_resume(struct pci_dev *dev) 245 { 246 pci_set_power_state(dev, 0); 247 pci_restore_state(dev); 248 249 return ati_configure(); 250 } 251 #endif 252 253 /* 254 *Since we don't need contiguous memory we just try 255 * to get the gatt table once 256 */ 257 258 #define GET_PAGE_DIR_OFF(addr) (addr >> 22) 259 #define GET_PAGE_DIR_IDX(addr) (GET_PAGE_DIR_OFF(addr) - \ 260 GET_PAGE_DIR_OFF(agp_bridge->gart_bus_addr)) 261 #define GET_GATT_OFF(addr) ((addr & 0x003ff000) >> 12) 262 #undef GET_GATT 263 #define GET_GATT(addr) (ati_generic_private.gatt_pages[\ 264 GET_PAGE_DIR_IDX(addr)]->remapped) 265 266 static int ati_insert_memory(struct agp_memory * mem, 267 off_t pg_start, int type) 268 { 269 int i, j, num_entries; 270 unsigned long __iomem *cur_gatt; 271 unsigned long addr; 272 int mask_type; 273 274 num_entries = A_SIZE_LVL2(agp_bridge->current_size)->num_entries; 275 276 mask_type = agp_generic_type_to_mask_type(mem->bridge, type); 277 if (mask_type != 0 || type != mem->type) 278 return -EINVAL; 279 280 if (mem->page_count == 0) 281 return 0; 282 283 if ((pg_start + mem->page_count) > num_entries) 284 return -EINVAL; 285 286 j = pg_start; 287 while (j < (pg_start + mem->page_count)) { 288 addr = (j * PAGE_SIZE) + agp_bridge->gart_bus_addr; 289 cur_gatt = GET_GATT(addr); 290 if (!PGE_EMPTY(agp_bridge,readl(cur_gatt+GET_GATT_OFF(addr)))) 291 return -EBUSY; 292 j++; 293 } 294 295 if (!mem->is_flushed) { 296 /*CACHE_FLUSH(); */ 297 global_cache_flush(); 298 mem->is_flushed = true; 299 } 300 301 for (i = 0, j = pg_start; i < mem->page_count; i++, j++) { 302 addr = (j * PAGE_SIZE) + agp_bridge->gart_bus_addr; 303 cur_gatt = GET_GATT(addr); 304 writel(agp_bridge->driver->mask_memory(agp_bridge, 305 page_to_phys(mem->pages[i]), 306 mem->type), 307 cur_gatt+GET_GATT_OFF(addr)); 308 } 309 readl(GET_GATT(agp_bridge->gart_bus_addr)); /* PCI posting */ 310 agp_bridge->driver->tlb_flush(mem); 311 return 0; 312 } 313 314 static int ati_remove_memory(struct agp_memory * mem, off_t pg_start, 315 int type) 316 { 317 int i; 318 unsigned long __iomem *cur_gatt; 319 unsigned long addr; 320 int mask_type; 321 322 mask_type = agp_generic_type_to_mask_type(mem->bridge, type); 323 if (mask_type != 0 || type != mem->type) 324 return -EINVAL; 325 326 if (mem->page_count == 0) 327 return 0; 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 } 334 335 readl(GET_GATT(agp_bridge->gart_bus_addr)); /* PCI posting */ 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 struct ati_page_map page_dir; 344 unsigned long __iomem *cur_gatt; 345 unsigned long addr; 346 int retval; 347 u32 temp; 348 int i; 349 struct aper_size_info_lvl2 *current_size; 350 351 value = A_SIZE_LVL2(agp_bridge->current_size); 352 retval = ati_create_page_map(&page_dir); 353 if (retval != 0) 354 return retval; 355 356 retval = ati_create_gatt_pages(value->num_entries / 1024); 357 if (retval != 0) { 358 ati_free_page_map(&page_dir); 359 return retval; 360 } 361 362 agp_bridge->gatt_table_real = (u32 *)page_dir.real; 363 agp_bridge->gatt_table = (u32 __iomem *) page_dir.remapped; 364 agp_bridge->gatt_bus_addr = virt_to_phys(page_dir.real); 365 366 /* Write out the size register */ 367 current_size = A_SIZE_LVL2(agp_bridge->current_size); 368 369 if (is_r200()) { 370 pci_read_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, &temp); 371 temp = (((temp & ~(0x0000000e)) | current_size->size_value) 372 | 0x00000001); 373 pci_write_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, temp); 374 pci_read_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, &temp); 375 } else { 376 pci_read_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, &temp); 377 temp = (((temp & ~(0x0000000e)) | current_size->size_value) 378 | 0x00000001); 379 pci_write_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, temp); 380 pci_read_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, &temp); 381 } 382 383 /* 384 * Get the address for the gart region. 385 * This is a bus address even on the alpha, b/c its 386 * used to program the agp master not the cpu 387 */ 388 pci_read_config_dword(agp_bridge->dev, AGP_APBASE, &temp); 389 addr = (temp & PCI_BASE_ADDRESS_MEM_MASK); 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[] __devinitdata = 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 __devinit agp_ati_probe(struct pci_dev *pdev, 494 const struct pci_device_id *ent) 495 { 496 struct agp_device_ids *devs = ati_agp_device_ids; 497 struct agp_bridge_data *bridge; 498 u8 cap_ptr; 499 int j; 500 501 cap_ptr = pci_find_capability(pdev, PCI_CAP_ID_AGP); 502 if (!cap_ptr) 503 return -ENODEV; 504 505 /* probe for known chipsets */ 506 for (j = 0; devs[j].chipset_name; j++) { 507 if (pdev->device == devs[j].device_id) 508 goto found; 509 } 510 511 dev_err(&pdev->dev, "unsupported Ati chipset [%04x/%04x])\n", 512 pdev->vendor, pdev->device); 513 return -ENODEV; 514 515 found: 516 bridge = agp_alloc_bridge(); 517 if (!bridge) 518 return -ENOMEM; 519 520 bridge->dev = pdev; 521 bridge->capndx = cap_ptr; 522 523 bridge->driver = &ati_generic_bridge; 524 525 dev_info(&pdev->dev, "Ati %s chipset\n", devs[j].chipset_name); 526 527 /* Fill in the mode register */ 528 pci_read_config_dword(pdev, 529 bridge->capndx+PCI_AGP_STATUS, 530 &bridge->mode); 531 532 pci_set_drvdata(pdev, bridge); 533 return agp_add_bridge(bridge); 534 } 535 536 static void __devexit agp_ati_remove(struct pci_dev *pdev) 537 { 538 struct agp_bridge_data *bridge = pci_get_drvdata(pdev); 539 540 agp_remove_bridge(bridge); 541 agp_put_bridge(bridge); 542 } 543 544 static struct pci_device_id agp_ati_pci_table[] = { 545 { 546 .class = (PCI_CLASS_BRIDGE_HOST << 8), 547 .class_mask = ~0, 548 .vendor = PCI_VENDOR_ID_ATI, 549 .device = PCI_ANY_ID, 550 .subvendor = PCI_ANY_ID, 551 .subdevice = PCI_ANY_ID, 552 }, 553 { } 554 }; 555 556 MODULE_DEVICE_TABLE(pci, agp_ati_pci_table); 557 558 static struct pci_driver agp_ati_pci_driver = { 559 .name = "agpgart-ati", 560 .id_table = agp_ati_pci_table, 561 .probe = agp_ati_probe, 562 .remove = agp_ati_remove, 563 #ifdef CONFIG_PM 564 .suspend = agp_ati_suspend, 565 .resume = agp_ati_resume, 566 #endif 567 }; 568 569 static int __init agp_ati_init(void) 570 { 571 if (agp_off) 572 return -EINVAL; 573 return pci_register_driver(&agp_ati_pci_driver); 574 } 575 576 static void __exit agp_ati_cleanup(void) 577 { 578 pci_unregister_driver(&agp_ati_pci_driver); 579 } 580 581 module_init(agp_ati_init); 582 module_exit(agp_ati_cleanup); 583 584 MODULE_AUTHOR("Dave Jones <davej@redhat.com>"); 585 MODULE_LICENSE("GPL and additional rights"); 586 587