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 SetPageReserved(virt_to_page(page_map->real)); 64 err = map_page_into_agp(virt_to_page(page_map->real)); 65 page_map->remapped = ioremap_nocache(virt_to_gart(page_map->real), 66 PAGE_SIZE); 67 if (page_map->remapped == NULL || err) { 68 ClearPageReserved(virt_to_page(page_map->real)); 69 free_page((unsigned long) page_map->real); 70 page_map->real = NULL; 71 return -ENOMEM; 72 } 73 /*CACHE_FLUSH();*/ 74 global_cache_flush(); 75 76 for (i = 0; i < PAGE_SIZE / sizeof(unsigned long); i++) { 77 writel(agp_bridge->scratch_page, page_map->remapped+i); 78 readl(page_map->remapped+i); /* PCI Posting. */ 79 } 80 81 return 0; 82 } 83 84 85 static void ati_free_page_map(struct ati_page_map *page_map) 86 { 87 unmap_page_from_agp(virt_to_page(page_map->real)); 88 iounmap(page_map->remapped); 89 ClearPageReserved(virt_to_page(page_map->real)); 90 free_page((unsigned long) page_map->real); 91 } 92 93 94 static void ati_free_gatt_pages(void) 95 { 96 int i; 97 struct ati_page_map **tables; 98 struct ati_page_map *entry; 99 100 tables = ati_generic_private.gatt_pages; 101 for (i = 0; i < ati_generic_private.num_tables; i++) { 102 entry = tables[i]; 103 if (entry != NULL) { 104 if (entry->real != NULL) 105 ati_free_page_map(entry); 106 kfree(entry); 107 } 108 } 109 kfree(tables); 110 } 111 112 113 static int ati_create_gatt_pages(int nr_tables) 114 { 115 struct ati_page_map **tables; 116 struct ati_page_map *entry; 117 int retval = 0; 118 int i; 119 120 tables = kzalloc((nr_tables + 1) * sizeof(struct ati_page_map *),GFP_KERNEL); 121 if (tables == NULL) 122 return -ENOMEM; 123 124 for (i = 0; i < nr_tables; i++) { 125 entry = kzalloc(sizeof(struct ati_page_map), GFP_KERNEL); 126 tables[i] = entry; 127 if (entry == NULL) { 128 retval = -ENOMEM; 129 break; 130 } 131 retval = ati_create_page_map(entry); 132 if (retval != 0) 133 break; 134 } 135 ati_generic_private.num_tables = i; 136 ati_generic_private.gatt_pages = tables; 137 138 if (retval != 0) 139 ati_free_gatt_pages(); 140 141 return retval; 142 } 143 144 static int is_r200(void) 145 { 146 if ((agp_bridge->dev->device == PCI_DEVICE_ID_ATI_RS100) || 147 (agp_bridge->dev->device == PCI_DEVICE_ID_ATI_RS200) || 148 (agp_bridge->dev->device == PCI_DEVICE_ID_ATI_RS200_B) || 149 (agp_bridge->dev->device == PCI_DEVICE_ID_ATI_RS250)) 150 return 1; 151 return 0; 152 } 153 154 static int ati_fetch_size(void) 155 { 156 int i; 157 u32 temp; 158 struct aper_size_info_lvl2 *values; 159 160 if (is_r200()) 161 pci_read_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, &temp); 162 else 163 pci_read_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, &temp); 164 165 temp = (temp & 0x0000000e); 166 values = A_SIZE_LVL2(agp_bridge->driver->aperture_sizes); 167 for (i = 0; i < agp_bridge->driver->num_aperture_sizes; i++) { 168 if (temp == values[i].size_value) { 169 agp_bridge->previous_size = 170 agp_bridge->current_size = (void *) (values + i); 171 172 agp_bridge->aperture_size_idx = i; 173 return values[i].size; 174 } 175 } 176 177 return 0; 178 } 179 180 static void ati_tlbflush(struct agp_memory * mem) 181 { 182 writel(1, ati_generic_private.registers+ATI_GART_CACHE_CNTRL); 183 readl(ati_generic_private.registers+ATI_GART_CACHE_CNTRL); /* PCI Posting. */ 184 } 185 186 static void ati_cleanup(void) 187 { 188 struct aper_size_info_lvl2 *previous_size; 189 u32 temp; 190 191 previous_size = A_SIZE_LVL2(agp_bridge->previous_size); 192 193 /* Write back the previous size and disable gart translation */ 194 if (is_r200()) { 195 pci_read_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, &temp); 196 temp = ((temp & ~(0x0000000f)) | previous_size->size_value); 197 pci_write_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, temp); 198 } else { 199 pci_read_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, &temp); 200 temp = ((temp & ~(0x0000000f)) | previous_size->size_value); 201 pci_write_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, temp); 202 } 203 iounmap((volatile u8 __iomem *)ati_generic_private.registers); 204 } 205 206 207 static int ati_configure(void) 208 { 209 u32 temp; 210 211 /* Get the memory mapped registers */ 212 pci_read_config_dword(agp_bridge->dev, ATI_GART_MMBASE_ADDR, &temp); 213 temp = (temp & 0xfffff000); 214 ati_generic_private.registers = (volatile u8 __iomem *) ioremap(temp, 4096); 215 216 if (is_r200()) 217 pci_write_config_dword(agp_bridge->dev, ATI_RS100_IG_AGPMODE, 0x20000); 218 else 219 pci_write_config_dword(agp_bridge->dev, ATI_RS300_IG_AGPMODE, 0x20000); 220 221 /* address to map too */ 222 /* 223 pci_read_config_dword(agp_bridge.dev, AGP_APBASE, &temp); 224 agp_bridge.gart_bus_addr = (temp & PCI_BASE_ADDRESS_MEM_MASK); 225 printk(KERN_INFO PFX "IGP320 gart_bus_addr: %x\n", agp_bridge.gart_bus_addr); 226 */ 227 writel(0x60000, ati_generic_private.registers+ATI_GART_FEATURE_ID); 228 readl(ati_generic_private.registers+ATI_GART_FEATURE_ID); /* PCI Posting.*/ 229 230 /* SIGNALED_SYSTEM_ERROR @ NB_STATUS */ 231 pci_read_config_dword(agp_bridge->dev, 4, &temp); 232 pci_write_config_dword(agp_bridge->dev, 4, temp | (1<<14)); 233 234 /* Write out the address of the gatt table */ 235 writel(agp_bridge->gatt_bus_addr, ati_generic_private.registers+ATI_GART_BASE); 236 readl(ati_generic_private.registers+ATI_GART_BASE); /* PCI Posting. */ 237 238 return 0; 239 } 240 241 242 #ifdef CONFIG_PM 243 static int agp_ati_suspend(struct pci_dev *dev, pm_message_t state) 244 { 245 pci_save_state(dev); 246 pci_set_power_state(dev, 3); 247 248 return 0; 249 } 250 251 static int agp_ati_resume(struct pci_dev *dev) 252 { 253 pci_set_power_state(dev, 0); 254 pci_restore_state(dev); 255 256 return ati_configure(); 257 } 258 #endif 259 260 /* 261 *Since we don't need contiguous memory we just try 262 * to get the gatt table once 263 */ 264 265 #define GET_PAGE_DIR_OFF(addr) (addr >> 22) 266 #define GET_PAGE_DIR_IDX(addr) (GET_PAGE_DIR_OFF(addr) - \ 267 GET_PAGE_DIR_OFF(agp_bridge->gart_bus_addr)) 268 #define GET_GATT_OFF(addr) ((addr & 0x003ff000) >> 12) 269 #undef GET_GATT 270 #define GET_GATT(addr) (ati_generic_private.gatt_pages[\ 271 GET_PAGE_DIR_IDX(addr)]->remapped) 272 273 static int ati_insert_memory(struct agp_memory * mem, 274 off_t pg_start, int type) 275 { 276 int i, j, num_entries; 277 unsigned long __iomem *cur_gatt; 278 unsigned long addr; 279 280 num_entries = A_SIZE_LVL2(agp_bridge->current_size)->num_entries; 281 282 if (type != 0 || mem->type != 0) 283 return -EINVAL; 284 285 if ((pg_start + mem->page_count) > num_entries) 286 return -EINVAL; 287 288 j = pg_start; 289 while (j < (pg_start + mem->page_count)) { 290 addr = (j * PAGE_SIZE) + agp_bridge->gart_bus_addr; 291 cur_gatt = GET_GATT(addr); 292 if (!PGE_EMPTY(agp_bridge,readl(cur_gatt+GET_GATT_OFF(addr)))) 293 return -EBUSY; 294 j++; 295 } 296 297 if (mem->is_flushed == FALSE) { 298 /*CACHE_FLUSH(); */ 299 global_cache_flush(); 300 mem->is_flushed = TRUE; 301 } 302 303 for (i = 0, j = pg_start; i < mem->page_count; i++, j++) { 304 addr = (j * PAGE_SIZE) + agp_bridge->gart_bus_addr; 305 cur_gatt = GET_GATT(addr); 306 writel(agp_bridge->driver->mask_memory(agp_bridge, 307 mem->memory[i], mem->type), cur_gatt+GET_GATT_OFF(addr)); 308 readl(cur_gatt+GET_GATT_OFF(addr)); /* PCI Posting. */ 309 } 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; 320 321 if (type != 0 || mem->type != 0) 322 return -EINVAL; 323 324 for (i = pg_start; i < (mem->page_count + pg_start); i++) { 325 addr = (i * PAGE_SIZE) + agp_bridge->gart_bus_addr; 326 cur_gatt = GET_GATT(addr); 327 writel(agp_bridge->scratch_page, cur_gatt+GET_GATT_OFF(addr)); 328 readl(cur_gatt+GET_GATT_OFF(addr)); /* PCI Posting. */ 329 } 330 331 agp_bridge->driver->tlb_flush(mem); 332 return 0; 333 } 334 335 static int ati_create_gatt_table(struct agp_bridge_data *bridge) 336 { 337 struct aper_size_info_lvl2 *value; 338 struct ati_page_map page_dir; 339 unsigned long addr; 340 int retval; 341 u32 temp; 342 int i; 343 struct aper_size_info_lvl2 *current_size; 344 345 value = A_SIZE_LVL2(agp_bridge->current_size); 346 retval = ati_create_page_map(&page_dir); 347 if (retval != 0) 348 return retval; 349 350 retval = ati_create_gatt_pages(value->num_entries / 1024); 351 if (retval != 0) { 352 ati_free_page_map(&page_dir); 353 return retval; 354 } 355 356 agp_bridge->gatt_table_real = (u32 *)page_dir.real; 357 agp_bridge->gatt_table = (u32 __iomem *) page_dir.remapped; 358 agp_bridge->gatt_bus_addr = virt_to_gart(page_dir.real); 359 360 /* Write out the size register */ 361 current_size = A_SIZE_LVL2(agp_bridge->current_size); 362 363 if (is_r200()) { 364 pci_read_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, &temp); 365 temp = (((temp & ~(0x0000000e)) | current_size->size_value) 366 | 0x00000001); 367 pci_write_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, temp); 368 pci_read_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, &temp); 369 } else { 370 pci_read_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, &temp); 371 temp = (((temp & ~(0x0000000e)) | current_size->size_value) 372 | 0x00000001); 373 pci_write_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, temp); 374 pci_read_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, &temp); 375 } 376 377 /* 378 * Get the address for the gart region. 379 * This is a bus address even on the alpha, b/c its 380 * used to program the agp master not the cpu 381 */ 382 pci_read_config_dword(agp_bridge->dev, AGP_APBASE, &temp); 383 addr = (temp & PCI_BASE_ADDRESS_MEM_MASK); 384 agp_bridge->gart_bus_addr = addr; 385 386 /* Calculate the agp offset */ 387 for (i = 0; i < value->num_entries / 1024; i++, addr += 0x00400000) { 388 writel(virt_to_gart(ati_generic_private.gatt_pages[i]->real) | 1, 389 page_dir.remapped+GET_PAGE_DIR_OFF(addr)); 390 readl(page_dir.remapped+GET_PAGE_DIR_OFF(addr)); /* PCI Posting. */ 391 } 392 393 return 0; 394 } 395 396 static int ati_free_gatt_table(struct agp_bridge_data *bridge) 397 { 398 struct ati_page_map page_dir; 399 400 page_dir.real = (unsigned long *)agp_bridge->gatt_table_real; 401 page_dir.remapped = (unsigned long __iomem *)agp_bridge->gatt_table; 402 403 ati_free_gatt_pages(); 404 ati_free_page_map(&page_dir); 405 return 0; 406 } 407 408 static const struct agp_bridge_driver ati_generic_bridge = { 409 .owner = THIS_MODULE, 410 .aperture_sizes = ati_generic_sizes, 411 .size_type = LVL2_APER_SIZE, 412 .num_aperture_sizes = 7, 413 .configure = ati_configure, 414 .fetch_size = ati_fetch_size, 415 .cleanup = ati_cleanup, 416 .tlb_flush = ati_tlbflush, 417 .mask_memory = agp_generic_mask_memory, 418 .masks = ati_generic_masks, 419 .agp_enable = agp_generic_enable, 420 .cache_flush = global_cache_flush, 421 .create_gatt_table = ati_create_gatt_table, 422 .free_gatt_table = ati_free_gatt_table, 423 .insert_memory = ati_insert_memory, 424 .remove_memory = ati_remove_memory, 425 .alloc_by_type = agp_generic_alloc_by_type, 426 .free_by_type = agp_generic_free_by_type, 427 .agp_alloc_page = agp_generic_alloc_page, 428 .agp_destroy_page = agp_generic_destroy_page, 429 .agp_type_to_mask_type = agp_generic_type_to_mask_type, 430 }; 431 432 433 static struct agp_device_ids ati_agp_device_ids[] __devinitdata = 434 { 435 { 436 .device_id = PCI_DEVICE_ID_ATI_RS100, 437 .chipset_name = "IGP320/M", 438 }, 439 { 440 .device_id = PCI_DEVICE_ID_ATI_RS200, 441 .chipset_name = "IGP330/340/345/350/M", 442 }, 443 { 444 .device_id = PCI_DEVICE_ID_ATI_RS200_B, 445 .chipset_name = "IGP345M", 446 }, 447 { 448 .device_id = PCI_DEVICE_ID_ATI_RS250, 449 .chipset_name = "IGP7000/M", 450 }, 451 { 452 .device_id = PCI_DEVICE_ID_ATI_RS300_100, 453 .chipset_name = "IGP9100/M", 454 }, 455 { 456 .device_id = PCI_DEVICE_ID_ATI_RS300_133, 457 .chipset_name = "IGP9100/M", 458 }, 459 { 460 .device_id = PCI_DEVICE_ID_ATI_RS300_166, 461 .chipset_name = "IGP9100/M", 462 }, 463 { 464 .device_id = PCI_DEVICE_ID_ATI_RS300_200, 465 .chipset_name = "IGP9100/M", 466 }, 467 { 468 .device_id = PCI_DEVICE_ID_ATI_RS350_200, 469 .chipset_name = "IGP9100/M", 470 }, 471 { }, /* dummy final entry, always present */ 472 }; 473 474 static int __devinit agp_ati_probe(struct pci_dev *pdev, 475 const struct pci_device_id *ent) 476 { 477 struct agp_device_ids *devs = ati_agp_device_ids; 478 struct agp_bridge_data *bridge; 479 u8 cap_ptr; 480 int j; 481 482 cap_ptr = pci_find_capability(pdev, PCI_CAP_ID_AGP); 483 if (!cap_ptr) 484 return -ENODEV; 485 486 /* probe for known chipsets */ 487 for (j = 0; devs[j].chipset_name; j++) { 488 if (pdev->device == devs[j].device_id) 489 goto found; 490 } 491 492 printk(KERN_ERR PFX 493 "Unsupported Ati chipset (device id: %04x)\n", pdev->device); 494 return -ENODEV; 495 496 found: 497 bridge = agp_alloc_bridge(); 498 if (!bridge) 499 return -ENOMEM; 500 501 bridge->dev = pdev; 502 bridge->capndx = cap_ptr; 503 504 bridge->driver = &ati_generic_bridge; 505 506 printk(KERN_INFO PFX "Detected Ati %s chipset\n", 507 devs[j].chipset_name); 508 509 /* Fill in the mode register */ 510 pci_read_config_dword(pdev, 511 bridge->capndx+PCI_AGP_STATUS, 512 &bridge->mode); 513 514 pci_set_drvdata(pdev, bridge); 515 return agp_add_bridge(bridge); 516 } 517 518 static void __devexit agp_ati_remove(struct pci_dev *pdev) 519 { 520 struct agp_bridge_data *bridge = pci_get_drvdata(pdev); 521 522 agp_remove_bridge(bridge); 523 agp_put_bridge(bridge); 524 } 525 526 static struct pci_device_id agp_ati_pci_table[] = { 527 { 528 .class = (PCI_CLASS_BRIDGE_HOST << 8), 529 .class_mask = ~0, 530 .vendor = PCI_VENDOR_ID_ATI, 531 .device = PCI_ANY_ID, 532 .subvendor = PCI_ANY_ID, 533 .subdevice = PCI_ANY_ID, 534 }, 535 { } 536 }; 537 538 MODULE_DEVICE_TABLE(pci, agp_ati_pci_table); 539 540 static struct pci_driver agp_ati_pci_driver = { 541 .name = "agpgart-ati", 542 .id_table = agp_ati_pci_table, 543 .probe = agp_ati_probe, 544 .remove = agp_ati_remove, 545 #ifdef CONFIG_PM 546 .suspend = agp_ati_suspend, 547 .resume = agp_ati_resume, 548 #endif 549 }; 550 551 static int __init agp_ati_init(void) 552 { 553 if (agp_off) 554 return -EINVAL; 555 return pci_register_driver(&agp_ati_pci_driver); 556 } 557 558 static void __exit agp_ati_cleanup(void) 559 { 560 pci_unregister_driver(&agp_ati_pci_driver); 561 } 562 563 module_init(agp_ati_init); 564 module_exit(agp_ati_cleanup); 565 566 MODULE_AUTHOR("Dave Jones <davej@codemonkey.org.uk>"); 567 MODULE_LICENSE("GPL and additional rights"); 568 569