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 <asm/set_memory.h> 13#include "agp.h" 14 15#define AMD_MMBASE_BAR 1 16#define AMD_APSIZE 0xac 17#define AMD_MODECNTL 0xb0 18#define AMD_MODECNTL2 0xb2 19#define AMD_GARTENABLE 0x02 /* In mmio region (16-bit register) */ 20#define AMD_ATTBASE 0x04 /* In mmio region (32-bit register) */ 21#define AMD_TLBFLUSH 0x0c /* In mmio region (32-bit register) */ 22#define AMD_CACHEENTRY 0x10 /* In mmio region (32-bit register) */ 23 24static const struct pci_device_id agp_amdk7_pci_table[]; 25 26struct amd_page_map { 27 unsigned long *real; 28 unsigned long __iomem *remapped; 29}; 30 31static struct _amd_irongate_private { 32 volatile u8 __iomem *registers; 33 struct amd_page_map **gatt_pages; 34 int num_tables; 35} amd_irongate_private; 36 37static int amd_create_page_map(struct amd_page_map *page_map) 38{ 39 int i; 40 41 page_map->real = (unsigned long *) __get_free_page(GFP_KERNEL); 42 if (page_map->real == NULL) 43 return -ENOMEM; 44 45 set_memory_uc((unsigned long)page_map->real, 1); 46 page_map->remapped = page_map->real; 47 48 for (i = 0; i < PAGE_SIZE / sizeof(unsigned long); i++) { 49 writel(agp_bridge->scratch_page, page_map->remapped+i); 50 readl(page_map->remapped+i); /* PCI Posting. */ 51 } 52 53 return 0; 54} 55 56static void amd_free_page_map(struct amd_page_map *page_map) 57{ 58 set_memory_wb((unsigned long)page_map->real, 1); 59 free_page((unsigned long) page_map->real); 60} 61 62static void amd_free_gatt_pages(void) 63{ 64 int i; 65 struct amd_page_map **tables; 66 struct amd_page_map *entry; 67 68 tables = amd_irongate_private.gatt_pages; 69 for (i = 0; i < amd_irongate_private.num_tables; i++) { 70 entry = tables[i]; 71 if (entry != NULL) { 72 if (entry->real != NULL) 73 amd_free_page_map(entry); 74 kfree(entry); 75 } 76 } 77 kfree(tables); 78 amd_irongate_private.gatt_pages = NULL; 79} 80 81static int amd_create_gatt_pages(int nr_tables) 82{ 83 struct amd_page_map **tables; 84 struct amd_page_map *entry; 85 int retval = 0; 86 int i; 87 88 tables = kcalloc(nr_tables + 1, sizeof(struct amd_page_map *), 89 GFP_KERNEL); 90 if (tables == NULL) 91 return -ENOMEM; 92 93 for (i = 0; i < nr_tables; i++) { 94 entry = kzalloc(sizeof(struct amd_page_map), GFP_KERNEL); 95 tables[i] = entry; 96 if (entry == NULL) { 97 retval = -ENOMEM; 98 break; 99 } 100 retval = amd_create_page_map(entry); 101 if (retval != 0) 102 break; 103 } 104 amd_irongate_private.num_tables = i; 105 amd_irongate_private.gatt_pages = tables; 106 107 if (retval != 0) 108 amd_free_gatt_pages(); 109 110 return retval; 111} 112 113/* Since we don't need contiguous memory we just try 114 * to get the gatt table once 115 */ 116 117#define GET_PAGE_DIR_OFF(addr) (addr >> 22) 118#define GET_PAGE_DIR_IDX(addr) (GET_PAGE_DIR_OFF(addr) - \ 119 GET_PAGE_DIR_OFF(agp_bridge->gart_bus_addr)) 120#define GET_GATT_OFF(addr) ((addr & 0x003ff000) >> 12) 121#define GET_GATT(addr) (amd_irongate_private.gatt_pages[\ 122 GET_PAGE_DIR_IDX(addr)]->remapped) 123 124static int amd_create_gatt_table(struct agp_bridge_data *bridge) 125{ 126 struct aper_size_info_lvl2 *value; 127 struct amd_page_map page_dir; 128 unsigned long __iomem *cur_gatt; 129 unsigned long addr; 130 int retval; 131 int i; 132 133 value = A_SIZE_LVL2(agp_bridge->current_size); 134 retval = amd_create_page_map(&page_dir); 135 if (retval != 0) 136 return retval; 137 138 retval = amd_create_gatt_pages(value->num_entries / 1024); 139 if (retval != 0) { 140 amd_free_page_map(&page_dir); 141 return retval; 142 } 143 144 agp_bridge->gatt_table_real = (u32 *)page_dir.real; 145 agp_bridge->gatt_table = (u32 __iomem *)page_dir.remapped; 146 agp_bridge->gatt_bus_addr = virt_to_phys(page_dir.real); 147 148 /* Get the address for the gart region. 149 * This is a bus address even on the alpha, b/c its 150 * used to program the agp master not the cpu 151 */ 152 153 addr = pci_bus_address(agp_bridge->dev, AGP_APERTURE_BAR); 154 agp_bridge->gart_bus_addr = addr; 155 156 /* Calculate the agp offset */ 157 for (i = 0; i < value->num_entries / 1024; i++, addr += 0x00400000) { 158 writel(virt_to_phys(amd_irongate_private.gatt_pages[i]->real) | 1, 159 page_dir.remapped+GET_PAGE_DIR_OFF(addr)); 160 readl(page_dir.remapped+GET_PAGE_DIR_OFF(addr)); /* PCI Posting. */ 161 } 162 163 for (i = 0; i < value->num_entries; i++) { 164 addr = (i * PAGE_SIZE) + agp_bridge->gart_bus_addr; 165 cur_gatt = GET_GATT(addr); 166 writel(agp_bridge->scratch_page, cur_gatt+GET_GATT_OFF(addr)); 167 readl(cur_gatt+GET_GATT_OFF(addr)); /* PCI Posting. */ 168 } 169 170 return 0; 171} 172 173static int amd_free_gatt_table(struct agp_bridge_data *bridge) 174{ 175 struct amd_page_map page_dir; 176 177 page_dir.real = (unsigned long *)agp_bridge->gatt_table_real; 178 page_dir.remapped = (unsigned long __iomem *)agp_bridge->gatt_table; 179 180 amd_free_gatt_pages(); 181 amd_free_page_map(&page_dir); 182 return 0; 183} 184 185static int amd_irongate_fetch_size(void) 186{ 187 int i; 188 u32 temp; 189 struct aper_size_info_lvl2 *values; 190 191 pci_read_config_dword(agp_bridge->dev, AMD_APSIZE, &temp); 192 temp = (temp & 0x0000000e); 193 values = A_SIZE_LVL2(agp_bridge->driver->aperture_sizes); 194 for (i = 0; i < agp_bridge->driver->num_aperture_sizes; i++) { 195 if (temp == values[i].size_value) { 196 agp_bridge->previous_size = 197 agp_bridge->current_size = (void *) (values + i); 198 199 agp_bridge->aperture_size_idx = i; 200 return values[i].size; 201 } 202 } 203 204 return 0; 205} 206 207static int amd_irongate_configure(void) 208{ 209 struct aper_size_info_lvl2 *current_size; 210 phys_addr_t reg; 211 u32 temp; 212 u16 enable_reg; 213 214 current_size = A_SIZE_LVL2(agp_bridge->current_size); 215 216 if (!amd_irongate_private.registers) { 217 /* Get the memory mapped registers */ 218 reg = pci_resource_start(agp_bridge->dev, AMD_MMBASE_BAR); 219 amd_irongate_private.registers = (volatile u8 __iomem *) ioremap(reg, 4096); 220 if (!amd_irongate_private.registers) 221 return -ENOMEM; 222 } 223 224 /* Write out the address of the gatt table */ 225 writel(agp_bridge->gatt_bus_addr, amd_irongate_private.registers+AMD_ATTBASE); 226 readl(amd_irongate_private.registers+AMD_ATTBASE); /* PCI Posting. */ 227 228 /* Write the Sync register */ 229 pci_write_config_byte(agp_bridge->dev, AMD_MODECNTL, 0x80); 230 231 /* Set indexing mode */ 232 pci_write_config_byte(agp_bridge->dev, AMD_MODECNTL2, 0x00); 233 234 /* Write the enable register */ 235 enable_reg = readw(amd_irongate_private.registers+AMD_GARTENABLE); 236 enable_reg = (enable_reg | 0x0004); 237 writew(enable_reg, amd_irongate_private.registers+AMD_GARTENABLE); 238 readw(amd_irongate_private.registers+AMD_GARTENABLE); /* PCI Posting. */ 239 240 /* Write out the size register */ 241 pci_read_config_dword(agp_bridge->dev, AMD_APSIZE, &temp); 242 temp = (((temp & ~(0x0000000e)) | current_size->size_value) | 1); 243 pci_write_config_dword(agp_bridge->dev, AMD_APSIZE, temp); 244 245 /* Flush the tlb */ 246 writel(1, amd_irongate_private.registers+AMD_TLBFLUSH); 247 readl(amd_irongate_private.registers+AMD_TLBFLUSH); /* PCI Posting.*/ 248 return 0; 249} 250 251static void amd_irongate_cleanup(void) 252{ 253 struct aper_size_info_lvl2 *previous_size; 254 u32 temp; 255 u16 enable_reg; 256 257 previous_size = A_SIZE_LVL2(agp_bridge->previous_size); 258 259 enable_reg = readw(amd_irongate_private.registers+AMD_GARTENABLE); 260 enable_reg = (enable_reg & ~(0x0004)); 261 writew(enable_reg, amd_irongate_private.registers+AMD_GARTENABLE); 262 readw(amd_irongate_private.registers+AMD_GARTENABLE); /* PCI Posting. */ 263 264 /* Write back the previous size and disable gart translation */ 265 pci_read_config_dword(agp_bridge->dev, AMD_APSIZE, &temp); 266 temp = ((temp & ~(0x0000000f)) | previous_size->size_value); 267 pci_write_config_dword(agp_bridge->dev, AMD_APSIZE, temp); 268 iounmap((void __iomem *) amd_irongate_private.registers); 269} 270 271/* 272 * This routine could be implemented by taking the addresses 273 * written to the GATT, and flushing them individually. However 274 * currently it just flushes the whole table. Which is probably 275 * more efficient, since agp_memory blocks can be a large number of 276 * entries. 277 */ 278 279static void amd_irongate_tlbflush(struct agp_memory *temp) 280{ 281 writel(1, amd_irongate_private.registers+AMD_TLBFLUSH); 282 readl(amd_irongate_private.registers+AMD_TLBFLUSH); /* PCI Posting. */ 283} 284 285static int amd_insert_memory(struct agp_memory *mem, off_t pg_start, int type) 286{ 287 int i, j, num_entries; 288 unsigned long __iomem *cur_gatt; 289 unsigned long addr; 290 291 num_entries = A_SIZE_LVL2(agp_bridge->current_size)->num_entries; 292 293 if (type != mem->type || 294 agp_bridge->driver->agp_type_to_mask_type(agp_bridge, type)) 295 return -EINVAL; 296 297 if ((pg_start + mem->page_count) > num_entries) 298 return -EINVAL; 299 300 j = pg_start; 301 while (j < (pg_start + mem->page_count)) { 302 addr = (j * PAGE_SIZE) + agp_bridge->gart_bus_addr; 303 cur_gatt = GET_GATT(addr); 304 if (!PGE_EMPTY(agp_bridge, readl(cur_gatt+GET_GATT_OFF(addr)))) 305 return -EBUSY; 306 j++; 307 } 308 309 if (!mem->is_flushed) { 310 global_cache_flush(); 311 mem->is_flushed = true; 312 } 313 314 for (i = 0, j = pg_start; i < mem->page_count; i++, j++) { 315 addr = (j * PAGE_SIZE) + agp_bridge->gart_bus_addr; 316 cur_gatt = GET_GATT(addr); 317 writel(agp_generic_mask_memory(agp_bridge, 318 page_to_phys(mem->pages[i]), 319 mem->type), 320 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 327static 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 != mem->type || 334 agp_bridge->driver->agp_type_to_mask_type(agp_bridge, type)) 335 return -EINVAL; 336 337 for (i = pg_start; i < (mem->page_count + pg_start); i++) { 338 addr = (i * PAGE_SIZE) + agp_bridge->gart_bus_addr; 339 cur_gatt = GET_GATT(addr); 340 writel(agp_bridge->scratch_page, cur_gatt+GET_GATT_OFF(addr)); 341 readl(cur_gatt+GET_GATT_OFF(addr)); /* PCI Posting. */ 342 } 343 344 amd_irongate_tlbflush(mem); 345 return 0; 346} 347 348static const struct aper_size_info_lvl2 amd_irongate_sizes[7] = 349{ 350 {2048, 524288, 0x0000000c}, 351 {1024, 262144, 0x0000000a}, 352 {512, 131072, 0x00000008}, 353 {256, 65536, 0x00000006}, 354 {128, 32768, 0x00000004}, 355 {64, 16384, 0x00000002}, 356 {32, 8192, 0x00000000} 357}; 358 359static const struct gatt_mask amd_irongate_masks[] = 360{ 361 {.mask = 1, .type = 0} 362}; 363 364static const struct agp_bridge_driver amd_irongate_driver = { 365 .owner = THIS_MODULE, 366 .aperture_sizes = amd_irongate_sizes, 367 .size_type = LVL2_APER_SIZE, 368 .num_aperture_sizes = 7, 369 .needs_scratch_page = true, 370 .configure = amd_irongate_configure, 371 .fetch_size = amd_irongate_fetch_size, 372 .cleanup = amd_irongate_cleanup, 373 .tlb_flush = amd_irongate_tlbflush, 374 .mask_memory = agp_generic_mask_memory, 375 .masks = amd_irongate_masks, 376 .agp_enable = agp_generic_enable, 377 .cache_flush = global_cache_flush, 378 .create_gatt_table = amd_create_gatt_table, 379 .free_gatt_table = amd_free_gatt_table, 380 .insert_memory = amd_insert_memory, 381 .remove_memory = amd_remove_memory, 382 .alloc_by_type = agp_generic_alloc_by_type, 383 .free_by_type = agp_generic_free_by_type, 384 .agp_alloc_page = agp_generic_alloc_page, 385 .agp_alloc_pages = agp_generic_alloc_pages, 386 .agp_destroy_page = agp_generic_destroy_page, 387 .agp_destroy_pages = agp_generic_destroy_pages, 388 .agp_type_to_mask_type = agp_generic_type_to_mask_type, 389}; 390 391static struct agp_device_ids amd_agp_device_ids[] = 392{ 393 { 394 .device_id = PCI_DEVICE_ID_AMD_FE_GATE_7006, 395 .chipset_name = "Irongate", 396 }, 397 { 398 .device_id = PCI_DEVICE_ID_AMD_FE_GATE_700E, 399 .chipset_name = "761", 400 }, 401 { 402 .device_id = PCI_DEVICE_ID_AMD_FE_GATE_700C, 403 .chipset_name = "760MP", 404 }, 405 { }, /* dummy final entry, always present */ 406}; 407 408static int agp_amdk7_probe(struct pci_dev *pdev, 409 const struct pci_device_id *ent) 410{ 411 struct agp_bridge_data *bridge; 412 u8 cap_ptr; 413 int j; 414 415 cap_ptr = pci_find_capability(pdev, PCI_CAP_ID_AGP); 416 if (!cap_ptr) 417 return -ENODEV; 418 419 j = ent - agp_amdk7_pci_table; 420 dev_info(&pdev->dev, "AMD %s chipset\n", 421 amd_agp_device_ids[j].chipset_name); 422 423 bridge = agp_alloc_bridge(); 424 if (!bridge) 425 return -ENOMEM; 426 427 bridge->driver = &amd_irongate_driver; 428 bridge->dev_private_data = &amd_irongate_private; 429 bridge->dev = pdev; 430 bridge->capndx = cap_ptr; 431 432 /* 751 Errata (22564_B-1.PDF) 433 erratum 20: strobe glitch with Nvidia NV10 GeForce cards. 434 system controller may experience noise due to strong drive strengths 435 */ 436 if (agp_bridge->dev->device == PCI_DEVICE_ID_AMD_FE_GATE_7006) { 437 struct pci_dev *gfxcard=NULL; 438 439 cap_ptr = 0; 440 while (!cap_ptr) { 441 gfxcard = pci_get_class(PCI_CLASS_DISPLAY_VGA<<8, gfxcard); 442 if (!gfxcard) { 443 dev_info(&pdev->dev, "no AGP VGA controller\n"); 444 return -ENODEV; 445 } 446 cap_ptr = pci_find_capability(gfxcard, PCI_CAP_ID_AGP); 447 } 448 449 /* With so many variants of NVidia cards, it's simpler just 450 to blacklist them all, and then whitelist them as needed 451 (if necessary at all). */ 452 if (gfxcard->vendor == PCI_VENDOR_ID_NVIDIA) { 453 agp_bridge->flags |= AGP_ERRATA_1X; 454 dev_info(&pdev->dev, "AMD 751 chipset with NVidia GeForce; forcing 1X due to errata\n"); 455 } 456 pci_dev_put(gfxcard); 457 } 458 459 /* 761 Errata (23613_F.pdf) 460 * Revisions B0/B1 were a disaster. 461 * erratum 44: SYSCLK/AGPCLK skew causes 2X failures -- Force mode to 1X 462 * erratum 45: Timing problem prevents fast writes -- Disable fast write. 463 * erratum 46: Setup violation on AGP SBA pins - Disable side band addressing. 464 * With this lot disabled, we should prevent lockups. */ 465 if (agp_bridge->dev->device == PCI_DEVICE_ID_AMD_FE_GATE_700E) { 466 if (pdev->revision == 0x10 || pdev->revision == 0x11) { 467 agp_bridge->flags = AGP_ERRATA_FASTWRITES; 468 agp_bridge->flags |= AGP_ERRATA_SBA; 469 agp_bridge->flags |= AGP_ERRATA_1X; 470 dev_info(&pdev->dev, "AMD 761 chipset with errata; disabling AGP fast writes & SBA and forcing to 1X\n"); 471 } 472 } 473 474 /* Fill in the mode register */ 475 pci_read_config_dword(pdev, 476 bridge->capndx+PCI_AGP_STATUS, 477 &bridge->mode); 478 479 pci_set_drvdata(pdev, bridge); 480 return agp_add_bridge(bridge); 481} 482 483static void agp_amdk7_remove(struct pci_dev *pdev) 484{ 485 struct agp_bridge_data *bridge = pci_get_drvdata(pdev); 486 487 agp_remove_bridge(bridge); 488 agp_put_bridge(bridge); 489} 490 491static int agp_amdk7_resume(struct device *dev) 492{ 493 return amd_irongate_driver.configure(); 494} 495 496/* must be the same order as name table above */ 497static const struct pci_device_id agp_amdk7_pci_table[] = { 498 { 499 .class = (PCI_CLASS_BRIDGE_HOST << 8), 500 .class_mask = ~0, 501 .vendor = PCI_VENDOR_ID_AMD, 502 .device = PCI_DEVICE_ID_AMD_FE_GATE_7006, 503 .subvendor = PCI_ANY_ID, 504 .subdevice = PCI_ANY_ID, 505 }, 506 { 507 .class = (PCI_CLASS_BRIDGE_HOST << 8), 508 .class_mask = ~0, 509 .vendor = PCI_VENDOR_ID_AMD, 510 .device = PCI_DEVICE_ID_AMD_FE_GATE_700E, 511 .subvendor = PCI_ANY_ID, 512 .subdevice = PCI_ANY_ID, 513 }, 514 { 515 .class = (PCI_CLASS_BRIDGE_HOST << 8), 516 .class_mask = ~0, 517 .vendor = PCI_VENDOR_ID_AMD, 518 .device = PCI_DEVICE_ID_AMD_FE_GATE_700C, 519 .subvendor = PCI_ANY_ID, 520 .subdevice = PCI_ANY_ID, 521 }, 522 { } 523}; 524 525MODULE_DEVICE_TABLE(pci, agp_amdk7_pci_table); 526 527static DEFINE_SIMPLE_DEV_PM_OPS(agp_amdk7_pm_ops, NULL, agp_amdk7_resume); 528 529static struct pci_driver agp_amdk7_pci_driver = { 530 .name = "agpgart-amdk7", 531 .id_table = agp_amdk7_pci_table, 532 .probe = agp_amdk7_probe, 533 .remove = agp_amdk7_remove, 534 .driver.pm = &agp_amdk7_pm_ops, 535}; 536 537static int __init agp_amdk7_init(void) 538{ 539 if (agp_off) 540 return -EINVAL; 541 return pci_register_driver(&agp_amdk7_pci_driver); 542} 543 544static void __exit agp_amdk7_cleanup(void) 545{ 546 pci_unregister_driver(&agp_amdk7_pci_driver); 547} 548 549module_init(agp_amdk7_init); 550module_exit(agp_amdk7_cleanup); 551 552MODULE_LICENSE("GPL and additional rights"); 553