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