1/* 2 * AMD K7 AGPGART routines. 3 */ 4 5#include <linux/module.h> 6#include <linux/pci.h> 7#include <linux/init.h> 8#include <linux/agp_backend.h> 9#include <linux/page-flags.h> 10#include <linux/mm.h> 11#include <linux/slab.h> 12#include "agp.h" 13 14#define AMD_MMBASE 0x14 15#define AMD_APSIZE 0xac 16#define AMD_MODECNTL 0xb0 17#define AMD_MODECNTL2 0xb2 18#define AMD_GARTENABLE 0x02 /* In mmio region (16-bit register) */ 19#define AMD_ATTBASE 0x04 /* In mmio region (32-bit register) */ 20#define AMD_TLBFLUSH 0x0c /* In mmio region (32-bit register) */ 21#define AMD_CACHEENTRY 0x10 /* In mmio region (32-bit register) */ 22 23static struct pci_device_id agp_amdk7_pci_table[]; 24 25struct amd_page_map { 26 unsigned long *real; 27 unsigned long __iomem *remapped; 28}; 29 30static struct _amd_irongate_private { 31 volatile u8 __iomem *registers; 32 struct amd_page_map **gatt_pages; 33 int num_tables; 34} amd_irongate_private; 35 36static int amd_create_page_map(struct amd_page_map *page_map) 37{ 38 int i; 39 40 page_map->real = (unsigned long *) __get_free_page(GFP_KERNEL); 41 if (page_map->real == NULL) 42 return -ENOMEM; 43 44#ifndef CONFIG_X86 45 SetPageReserved(virt_to_page(page_map->real)); 46 global_cache_flush(); 47 page_map->remapped = ioremap_nocache(virt_to_phys(page_map->real), 48 PAGE_SIZE); 49 if (page_map->remapped == NULL) { 50 ClearPageReserved(virt_to_page(page_map->real)); 51 free_page((unsigned long) page_map->real); 52 page_map->real = NULL; 53 return -ENOMEM; 54 } 55 global_cache_flush(); 56#else 57 set_memory_uc((unsigned long)page_map->real, 1); 58 page_map->remapped = page_map->real; 59#endif 60 61 for (i = 0; i < PAGE_SIZE / sizeof(unsigned long); i++) { 62 writel(agp_bridge->scratch_page, page_map->remapped+i); 63 readl(page_map->remapped+i); /* PCI Posting. */ 64 } 65 66 return 0; 67} 68 69static void amd_free_page_map(struct amd_page_map *page_map) 70{ 71#ifndef CONFIG_X86 72 iounmap(page_map->remapped); 73 ClearPageReserved(virt_to_page(page_map->real)); 74#else 75 set_memory_wb((unsigned long)page_map->real, 1); 76#endif 77 free_page((unsigned long) page_map->real); 78} 79 80static void amd_free_gatt_pages(void) 81{ 82 int i; 83 struct amd_page_map **tables; 84 struct amd_page_map *entry; 85 86 tables = amd_irongate_private.gatt_pages; 87 for (i = 0; i < amd_irongate_private.num_tables; i++) { 88 entry = tables[i]; 89 if (entry != NULL) { 90 if (entry->real != NULL) 91 amd_free_page_map(entry); 92 kfree(entry); 93 } 94 } 95 kfree(tables); 96 amd_irongate_private.gatt_pages = NULL; 97} 98 99static int amd_create_gatt_pages(int nr_tables) 100{ 101 struct amd_page_map **tables; 102 struct amd_page_map *entry; 103 int retval = 0; 104 int i; 105 106 tables = kzalloc((nr_tables + 1) * sizeof(struct amd_page_map *),GFP_KERNEL); 107 if (tables == NULL) 108 return -ENOMEM; 109 110 for (i = 0; i < nr_tables; i++) { 111 entry = kzalloc(sizeof(struct amd_page_map), GFP_KERNEL); 112 tables[i] = entry; 113 if (entry == NULL) { 114 retval = -ENOMEM; 115 break; 116 } 117 retval = amd_create_page_map(entry); 118 if (retval != 0) 119 break; 120 } 121 amd_irongate_private.num_tables = i; 122 amd_irongate_private.gatt_pages = tables; 123 124 if (retval != 0) 125 amd_free_gatt_pages(); 126 127 return retval; 128} 129 130/* Since we don't need contiguous memory we just try 131 * to get the gatt table once 132 */ 133 134#define GET_PAGE_DIR_OFF(addr) (addr >> 22) 135#define GET_PAGE_DIR_IDX(addr) (GET_PAGE_DIR_OFF(addr) - \ 136 GET_PAGE_DIR_OFF(agp_bridge->gart_bus_addr)) 137#define GET_GATT_OFF(addr) ((addr & 0x003ff000) >> 12) 138#define GET_GATT(addr) (amd_irongate_private.gatt_pages[\ 139 GET_PAGE_DIR_IDX(addr)]->remapped) 140 141static int amd_create_gatt_table(struct agp_bridge_data *bridge) 142{ 143 struct aper_size_info_lvl2 *value; 144 struct amd_page_map page_dir; 145 unsigned long __iomem *cur_gatt; 146 unsigned long addr; 147 int retval; 148 u32 temp; 149 int i; 150 151 value = A_SIZE_LVL2(agp_bridge->current_size); 152 retval = amd_create_page_map(&page_dir); 153 if (retval != 0) 154 return retval; 155 156 retval = amd_create_gatt_pages(value->num_entries / 1024); 157 if (retval != 0) { 158 amd_free_page_map(&page_dir); 159 return retval; 160 } 161 162 agp_bridge->gatt_table_real = (u32 *)page_dir.real; 163 agp_bridge->gatt_table = (u32 __iomem *)page_dir.remapped; 164 agp_bridge->gatt_bus_addr = virt_to_phys(page_dir.real); 165 166 /* Get the address for the gart region. 167 * This is a bus address even on the alpha, b/c its 168 * used to program the agp master not the cpu 169 */ 170 171 pci_read_config_dword(agp_bridge->dev, AGP_APBASE, &temp); 172 addr = (temp & PCI_BASE_ADDRESS_MEM_MASK); 173 agp_bridge->gart_bus_addr = addr; 174 175 /* Calculate the agp offset */ 176 for (i = 0; i < value->num_entries / 1024; i++, addr += 0x00400000) { 177 writel(virt_to_phys(amd_irongate_private.gatt_pages[i]->real) | 1, 178 page_dir.remapped+GET_PAGE_DIR_OFF(addr)); 179 readl(page_dir.remapped+GET_PAGE_DIR_OFF(addr)); /* PCI Posting. */ 180 } 181 182 for (i = 0; i < value->num_entries; i++) { 183 addr = (i * PAGE_SIZE) + agp_bridge->gart_bus_addr; 184 cur_gatt = GET_GATT(addr); 185 writel(agp_bridge->scratch_page, cur_gatt+GET_GATT_OFF(addr)); 186 readl(cur_gatt+GET_GATT_OFF(addr)); /* PCI Posting. */ 187 } 188 189 return 0; 190} 191 192static int amd_free_gatt_table(struct agp_bridge_data *bridge) 193{ 194 struct amd_page_map page_dir; 195 196 page_dir.real = (unsigned long *)agp_bridge->gatt_table_real; 197 page_dir.remapped = (unsigned long __iomem *)agp_bridge->gatt_table; 198 199 amd_free_gatt_pages(); 200 amd_free_page_map(&page_dir); 201 return 0; 202} 203 204static int amd_irongate_fetch_size(void) 205{ 206 int i; 207 u32 temp; 208 struct aper_size_info_lvl2 *values; 209 210 pci_read_config_dword(agp_bridge->dev, AMD_APSIZE, &temp); 211 temp = (temp & 0x0000000e); 212 values = A_SIZE_LVL2(agp_bridge->driver->aperture_sizes); 213 for (i = 0; i < agp_bridge->driver->num_aperture_sizes; i++) { 214 if (temp == values[i].size_value) { 215 agp_bridge->previous_size = 216 agp_bridge->current_size = (void *) (values + i); 217 218 agp_bridge->aperture_size_idx = i; 219 return values[i].size; 220 } 221 } 222 223 return 0; 224} 225 226static int amd_irongate_configure(void) 227{ 228 struct aper_size_info_lvl2 *current_size; 229 u32 temp; 230 u16 enable_reg; 231 232 current_size = A_SIZE_LVL2(agp_bridge->current_size); 233 234 if (!amd_irongate_private.registers) { 235 /* Get the memory mapped registers */ 236 pci_read_config_dword(agp_bridge->dev, AMD_MMBASE, &temp); 237 temp = (temp & PCI_BASE_ADDRESS_MEM_MASK); 238 amd_irongate_private.registers = (volatile u8 __iomem *) ioremap(temp, 4096); 239 if (!amd_irongate_private.registers) 240 return -ENOMEM; 241 } 242 243 /* Write out the address of the gatt table */ 244 writel(agp_bridge->gatt_bus_addr, amd_irongate_private.registers+AMD_ATTBASE); 245 readl(amd_irongate_private.registers+AMD_ATTBASE); /* PCI Posting. */ 246 247 /* Write the Sync register */ 248 pci_write_config_byte(agp_bridge->dev, AMD_MODECNTL, 0x80); 249 250 /* Set indexing mode */ 251 pci_write_config_byte(agp_bridge->dev, AMD_MODECNTL2, 0x00); 252 253 /* Write the enable register */ 254 enable_reg = readw(amd_irongate_private.registers+AMD_GARTENABLE); 255 enable_reg = (enable_reg | 0x0004); 256 writew(enable_reg, amd_irongate_private.registers+AMD_GARTENABLE); 257 readw(amd_irongate_private.registers+AMD_GARTENABLE); /* PCI Posting. */ 258 259 /* Write out the size register */ 260 pci_read_config_dword(agp_bridge->dev, AMD_APSIZE, &temp); 261 temp = (((temp & ~(0x0000000e)) | current_size->size_value) | 1); 262 pci_write_config_dword(agp_bridge->dev, AMD_APSIZE, temp); 263 264 /* Flush the tlb */ 265 writel(1, amd_irongate_private.registers+AMD_TLBFLUSH); 266 readl(amd_irongate_private.registers+AMD_TLBFLUSH); /* PCI Posting.*/ 267 return 0; 268} 269 270static void amd_irongate_cleanup(void) 271{ 272 struct aper_size_info_lvl2 *previous_size; 273 u32 temp; 274 u16 enable_reg; 275 276 previous_size = A_SIZE_LVL2(agp_bridge->previous_size); 277 278 enable_reg = readw(amd_irongate_private.registers+AMD_GARTENABLE); 279 enable_reg = (enable_reg & ~(0x0004)); 280 writew(enable_reg, amd_irongate_private.registers+AMD_GARTENABLE); 281 readw(amd_irongate_private.registers+AMD_GARTENABLE); /* PCI Posting. */ 282 283 /* Write back the previous size and disable gart translation */ 284 pci_read_config_dword(agp_bridge->dev, AMD_APSIZE, &temp); 285 temp = ((temp & ~(0x0000000f)) | previous_size->size_value); 286 pci_write_config_dword(agp_bridge->dev, AMD_APSIZE, temp); 287 iounmap((void __iomem *) amd_irongate_private.registers); 288} 289 290/* 291 * This routine could be implemented by taking the addresses 292 * written to the GATT, and flushing them individually. However 293 * currently it just flushes the whole table. Which is probably 294 * more efficent, since agp_memory blocks can be a large number of 295 * entries. 296 */ 297 298static void amd_irongate_tlbflush(struct agp_memory *temp) 299{ 300 writel(1, amd_irongate_private.registers+AMD_TLBFLUSH); 301 readl(amd_irongate_private.registers+AMD_TLBFLUSH); /* PCI Posting. */ 302} 303 304static int amd_insert_memory(struct agp_memory *mem, off_t pg_start, int type) 305{ 306 int i, j, num_entries; 307 unsigned long __iomem *cur_gatt; 308 unsigned long addr; 309 310 num_entries = A_SIZE_LVL2(agp_bridge->current_size)->num_entries; 311 312 if (type != 0 || mem->type != 0) 313 return -EINVAL; 314 315 if ((pg_start + mem->page_count) > num_entries) 316 return -EINVAL; 317 318 j = pg_start; 319 while (j < (pg_start + mem->page_count)) { 320 addr = (j * PAGE_SIZE) + agp_bridge->gart_bus_addr; 321 cur_gatt = GET_GATT(addr); 322 if (!PGE_EMPTY(agp_bridge, readl(cur_gatt+GET_GATT_OFF(addr)))) 323 return -EBUSY; 324 j++; 325 } 326 327 if (!mem->is_flushed) { 328 global_cache_flush(); 329 mem->is_flushed = true; 330 } 331 332 for (i = 0, j = pg_start; i < mem->page_count; i++, j++) { 333 addr = (j * PAGE_SIZE) + agp_bridge->gart_bus_addr; 334 cur_gatt = GET_GATT(addr); 335 writel(agp_generic_mask_memory(agp_bridge, 336 page_to_phys(mem->pages[i]), 337 mem->type), 338 cur_gatt+GET_GATT_OFF(addr)); 339 readl(cur_gatt+GET_GATT_OFF(addr)); /* PCI Posting. */ 340 } 341 amd_irongate_tlbflush(mem); 342 return 0; 343} 344 345static int amd_remove_memory(struct agp_memory *mem, off_t pg_start, int type) 346{ 347 int i; 348 unsigned long __iomem *cur_gatt; 349 unsigned long addr; 350 351 if (type != 0 || mem->type != 0) 352 return -EINVAL; 353 354 for (i = pg_start; i < (mem->page_count + pg_start); i++) { 355 addr = (i * PAGE_SIZE) + agp_bridge->gart_bus_addr; 356 cur_gatt = GET_GATT(addr); 357 writel(agp_bridge->scratch_page, cur_gatt+GET_GATT_OFF(addr)); 358 readl(cur_gatt+GET_GATT_OFF(addr)); /* PCI Posting. */ 359 } 360 361 amd_irongate_tlbflush(mem); 362 return 0; 363} 364 365static const struct aper_size_info_lvl2 amd_irongate_sizes[7] = 366{ 367 {2048, 524288, 0x0000000c}, 368 {1024, 262144, 0x0000000a}, 369 {512, 131072, 0x00000008}, 370 {256, 65536, 0x00000006}, 371 {128, 32768, 0x00000004}, 372 {64, 16384, 0x00000002}, 373 {32, 8192, 0x00000000} 374}; 375 376static const struct gatt_mask amd_irongate_masks[] = 377{ 378 {.mask = 1, .type = 0} 379}; 380 381static const struct agp_bridge_driver amd_irongate_driver = { 382 .owner = THIS_MODULE, 383 .aperture_sizes = amd_irongate_sizes, 384 .size_type = LVL2_APER_SIZE, 385 .num_aperture_sizes = 7, 386 .needs_scratch_page = true, 387 .configure = amd_irongate_configure, 388 .fetch_size = amd_irongate_fetch_size, 389 .cleanup = amd_irongate_cleanup, 390 .tlb_flush = amd_irongate_tlbflush, 391 .mask_memory = agp_generic_mask_memory, 392 .masks = amd_irongate_masks, 393 .agp_enable = agp_generic_enable, 394 .cache_flush = global_cache_flush, 395 .create_gatt_table = amd_create_gatt_table, 396 .free_gatt_table = amd_free_gatt_table, 397 .insert_memory = amd_insert_memory, 398 .remove_memory = amd_remove_memory, 399 .alloc_by_type = agp_generic_alloc_by_type, 400 .free_by_type = agp_generic_free_by_type, 401 .agp_alloc_page = agp_generic_alloc_page, 402 .agp_alloc_pages = agp_generic_alloc_pages, 403 .agp_destroy_page = agp_generic_destroy_page, 404 .agp_destroy_pages = agp_generic_destroy_pages, 405 .agp_type_to_mask_type = agp_generic_type_to_mask_type, 406}; 407 408static struct agp_device_ids amd_agp_device_ids[] __devinitdata = 409{ 410 { 411 .device_id = PCI_DEVICE_ID_AMD_FE_GATE_7006, 412 .chipset_name = "Irongate", 413 }, 414 { 415 .device_id = PCI_DEVICE_ID_AMD_FE_GATE_700E, 416 .chipset_name = "761", 417 }, 418 { 419 .device_id = PCI_DEVICE_ID_AMD_FE_GATE_700C, 420 .chipset_name = "760MP", 421 }, 422 { }, /* dummy final entry, always present */ 423}; 424 425static int __devinit agp_amdk7_probe(struct pci_dev *pdev, 426 const struct pci_device_id *ent) 427{ 428 struct agp_bridge_data *bridge; 429 u8 cap_ptr; 430 int j; 431 432 cap_ptr = pci_find_capability(pdev, PCI_CAP_ID_AGP); 433 if (!cap_ptr) 434 return -ENODEV; 435 436 j = ent - agp_amdk7_pci_table; 437 dev_info(&pdev->dev, "AMD %s chipset\n", 438 amd_agp_device_ids[j].chipset_name); 439 440 bridge = agp_alloc_bridge(); 441 if (!bridge) 442 return -ENOMEM; 443 444 bridge->driver = &amd_irongate_driver; 445 bridge->dev_private_data = &amd_irongate_private, 446 bridge->dev = pdev; 447 bridge->capndx = cap_ptr; 448 449 /* 751 Errata (22564_B-1.PDF) 450 erratum 20: strobe glitch with Nvidia NV10 GeForce cards. 451 system controller may experience noise due to strong drive strengths 452 */ 453 if (agp_bridge->dev->device == PCI_DEVICE_ID_AMD_FE_GATE_7006) { 454 struct pci_dev *gfxcard=NULL; 455 456 cap_ptr = 0; 457 while (!cap_ptr) { 458 gfxcard = pci_get_class(PCI_CLASS_DISPLAY_VGA<<8, gfxcard); 459 if (!gfxcard) { 460 dev_info(&pdev->dev, "no AGP VGA controller\n"); 461 return -ENODEV; 462 } 463 cap_ptr = pci_find_capability(gfxcard, PCI_CAP_ID_AGP); 464 } 465 466 /* With so many variants of NVidia cards, it's simpler just 467 to blacklist them all, and then whitelist them as needed 468 (if necessary at all). */ 469 if (gfxcard->vendor == PCI_VENDOR_ID_NVIDIA) { 470 agp_bridge->flags |= AGP_ERRATA_1X; 471 dev_info(&pdev->dev, "AMD 751 chipset with NVidia GeForce; forcing 1X due to errata\n"); 472 } 473 pci_dev_put(gfxcard); 474 } 475 476 /* 761 Errata (23613_F.pdf) 477 * Revisions B0/B1 were a disaster. 478 * erratum 44: SYSCLK/AGPCLK skew causes 2X failures -- Force mode to 1X 479 * erratum 45: Timing problem prevents fast writes -- Disable fast write. 480 * erratum 46: Setup violation on AGP SBA pins - Disable side band addressing. 481 * With this lot disabled, we should prevent lockups. */ 482 if (agp_bridge->dev->device == PCI_DEVICE_ID_AMD_FE_GATE_700E) { 483 if (pdev->revision == 0x10 || pdev->revision == 0x11) { 484 agp_bridge->flags = AGP_ERRATA_FASTWRITES; 485 agp_bridge->flags |= AGP_ERRATA_SBA; 486 agp_bridge->flags |= AGP_ERRATA_1X; 487 dev_info(&pdev->dev, "AMD 761 chipset with errata; disabling AGP fast writes & SBA and forcing to 1X\n"); 488 } 489 } 490 491 /* Fill in the mode register */ 492 pci_read_config_dword(pdev, 493 bridge->capndx+PCI_AGP_STATUS, 494 &bridge->mode); 495 496 pci_set_drvdata(pdev, bridge); 497 return agp_add_bridge(bridge); 498} 499 500static void __devexit agp_amdk7_remove(struct pci_dev *pdev) 501{ 502 struct agp_bridge_data *bridge = pci_get_drvdata(pdev); 503 504 agp_remove_bridge(bridge); 505 agp_put_bridge(bridge); 506} 507 508#ifdef CONFIG_PM 509 510static int agp_amdk7_suspend(struct pci_dev *pdev, pm_message_t state) 511{ 512 pci_save_state(pdev); 513 pci_set_power_state(pdev, pci_choose_state(pdev, state)); 514 515 return 0; 516} 517 518static int agp_amdk7_resume(struct pci_dev *pdev) 519{ 520 pci_set_power_state(pdev, PCI_D0); 521 pci_restore_state(pdev); 522 523 return amd_irongate_driver.configure(); 524} 525 526#endif /* CONFIG_PM */ 527 528/* must be the same order as name table above */ 529static struct pci_device_id agp_amdk7_pci_table[] = { 530 { 531 .class = (PCI_CLASS_BRIDGE_HOST << 8), 532 .class_mask = ~0, 533 .vendor = PCI_VENDOR_ID_AMD, 534 .device = PCI_DEVICE_ID_AMD_FE_GATE_7006, 535 .subvendor = PCI_ANY_ID, 536 .subdevice = PCI_ANY_ID, 537 }, 538 { 539 .class = (PCI_CLASS_BRIDGE_HOST << 8), 540 .class_mask = ~0, 541 .vendor = PCI_VENDOR_ID_AMD, 542 .device = PCI_DEVICE_ID_AMD_FE_GATE_700E, 543 .subvendor = PCI_ANY_ID, 544 .subdevice = PCI_ANY_ID, 545 }, 546 { 547 .class = (PCI_CLASS_BRIDGE_HOST << 8), 548 .class_mask = ~0, 549 .vendor = PCI_VENDOR_ID_AMD, 550 .device = PCI_DEVICE_ID_AMD_FE_GATE_700C, 551 .subvendor = PCI_ANY_ID, 552 .subdevice = PCI_ANY_ID, 553 }, 554 { } 555}; 556 557MODULE_DEVICE_TABLE(pci, agp_amdk7_pci_table); 558 559static struct pci_driver agp_amdk7_pci_driver = { 560 .name = "agpgart-amdk7", 561 .id_table = agp_amdk7_pci_table, 562 .probe = agp_amdk7_probe, 563 .remove = agp_amdk7_remove, 564#ifdef CONFIG_PM 565 .suspend = agp_amdk7_suspend, 566 .resume = agp_amdk7_resume, 567#endif 568}; 569 570static int __init agp_amdk7_init(void) 571{ 572 if (agp_off) 573 return -EINVAL; 574 return pci_register_driver(&agp_amdk7_pci_driver); 575} 576 577static void __exit agp_amdk7_cleanup(void) 578{ 579 pci_unregister_driver(&agp_amdk7_pci_driver); 580} 581 582module_init(agp_amdk7_init); 583module_exit(agp_amdk7_cleanup); 584 585MODULE_LICENSE("GPL and additional rights"); 586