ati-agp.c revision 5bdbc7dc2c07d507b41bffdadc2c8cc13b2d4326
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 27static 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 38static struct gatt_mask ati_generic_masks[] = 39{ 40 { .mask = 1, .type = 0} 41}; 42 43 44struct ati_page_map { 45 unsigned long *real; 46 unsigned long __iomem *remapped; 47}; 48 49static 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 55static 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 85static 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 94static 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 113static 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 144static 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 154static 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 180static 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 186static 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 207static 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 (!ati_generic_private.registers) 217 return -ENOMEM; 218 219 if (is_r200()) 220 pci_write_config_dword(agp_bridge->dev, ATI_RS100_IG_AGPMODE, 0x20000); 221 else 222 pci_write_config_dword(agp_bridge->dev, ATI_RS300_IG_AGPMODE, 0x20000); 223 224 /* address to map too */ 225 /* 226 pci_read_config_dword(agp_bridge.dev, AGP_APBASE, &temp); 227 agp_bridge.gart_bus_addr = (temp & PCI_BASE_ADDRESS_MEM_MASK); 228 printk(KERN_INFO PFX "IGP320 gart_bus_addr: %x\n", agp_bridge.gart_bus_addr); 229 */ 230 writel(0x60000, ati_generic_private.registers+ATI_GART_FEATURE_ID); 231 readl(ati_generic_private.registers+ATI_GART_FEATURE_ID); /* PCI Posting.*/ 232 233 /* SIGNALED_SYSTEM_ERROR @ NB_STATUS */ 234 pci_read_config_dword(agp_bridge->dev, 4, &temp); 235 pci_write_config_dword(agp_bridge->dev, 4, temp | (1<<14)); 236 237 /* Write out the address of the gatt table */ 238 writel(agp_bridge->gatt_bus_addr, ati_generic_private.registers+ATI_GART_BASE); 239 readl(ati_generic_private.registers+ATI_GART_BASE); /* PCI Posting. */ 240 241 return 0; 242} 243 244 245#ifdef CONFIG_PM 246static int agp_ati_suspend(struct pci_dev *dev, pm_message_t state) 247{ 248 pci_save_state(dev); 249 pci_set_power_state(dev, 3); 250 251 return 0; 252} 253 254static int agp_ati_resume(struct pci_dev *dev) 255{ 256 pci_set_power_state(dev, 0); 257 pci_restore_state(dev); 258 259 return ati_configure(); 260} 261#endif 262 263/* 264 *Since we don't need contiguous memory we just try 265 * to get the gatt table once 266 */ 267 268#define GET_PAGE_DIR_OFF(addr) (addr >> 22) 269#define GET_PAGE_DIR_IDX(addr) (GET_PAGE_DIR_OFF(addr) - \ 270 GET_PAGE_DIR_OFF(agp_bridge->gart_bus_addr)) 271#define GET_GATT_OFF(addr) ((addr & 0x003ff000) >> 12) 272#undef GET_GATT 273#define GET_GATT(addr) (ati_generic_private.gatt_pages[\ 274 GET_PAGE_DIR_IDX(addr)]->remapped) 275 276static int ati_insert_memory(struct agp_memory * mem, 277 off_t pg_start, int type) 278{ 279 int i, j, num_entries; 280 unsigned long __iomem *cur_gatt; 281 unsigned long addr; 282 283 num_entries = A_SIZE_LVL2(agp_bridge->current_size)->num_entries; 284 285 if (type != 0 || mem->type != 0) 286 return -EINVAL; 287 288 if ((pg_start + mem->page_count) > num_entries) 289 return -EINVAL; 290 291 j = pg_start; 292 while (j < (pg_start + mem->page_count)) { 293 addr = (j * PAGE_SIZE) + agp_bridge->gart_bus_addr; 294 cur_gatt = GET_GATT(addr); 295 if (!PGE_EMPTY(agp_bridge,readl(cur_gatt+GET_GATT_OFF(addr)))) 296 return -EBUSY; 297 j++; 298 } 299 300 if (mem->is_flushed == FALSE) { 301 /*CACHE_FLUSH(); */ 302 global_cache_flush(); 303 mem->is_flushed = TRUE; 304 } 305 306 for (i = 0, j = pg_start; i < mem->page_count; i++, j++) { 307 addr = (j * PAGE_SIZE) + agp_bridge->gart_bus_addr; 308 cur_gatt = GET_GATT(addr); 309 writel(agp_bridge->driver->mask_memory(agp_bridge, 310 mem->memory[i], mem->type), cur_gatt+GET_GATT_OFF(addr)); 311 readl(cur_gatt+GET_GATT_OFF(addr)); /* PCI Posting. */ 312 } 313 agp_bridge->driver->tlb_flush(mem); 314 return 0; 315} 316 317static int ati_remove_memory(struct agp_memory * mem, off_t pg_start, 318 int type) 319{ 320 int i; 321 unsigned long __iomem *cur_gatt; 322 unsigned long addr; 323 324 if (type != 0 || mem->type != 0) 325 return -EINVAL; 326 327 for (i = pg_start; i < (mem->page_count + pg_start); i++) { 328 addr = (i * PAGE_SIZE) + agp_bridge->gart_bus_addr; 329 cur_gatt = GET_GATT(addr); 330 writel(agp_bridge->scratch_page, cur_gatt+GET_GATT_OFF(addr)); 331 readl(cur_gatt+GET_GATT_OFF(addr)); /* PCI Posting. */ 332 } 333 334 agp_bridge->driver->tlb_flush(mem); 335 return 0; 336} 337 338static int ati_create_gatt_table(struct agp_bridge_data *bridge) 339{ 340 struct aper_size_info_lvl2 *value; 341 struct ati_page_map page_dir; 342 unsigned long addr; 343 int retval; 344 u32 temp; 345 int i; 346 struct aper_size_info_lvl2 *current_size; 347 348 value = A_SIZE_LVL2(agp_bridge->current_size); 349 retval = ati_create_page_map(&page_dir); 350 if (retval != 0) 351 return retval; 352 353 retval = ati_create_gatt_pages(value->num_entries / 1024); 354 if (retval != 0) { 355 ati_free_page_map(&page_dir); 356 return retval; 357 } 358 359 agp_bridge->gatt_table_real = (u32 *)page_dir.real; 360 agp_bridge->gatt_table = (u32 __iomem *) page_dir.remapped; 361 agp_bridge->gatt_bus_addr = virt_to_gart(page_dir.real); 362 363 /* Write out the size register */ 364 current_size = A_SIZE_LVL2(agp_bridge->current_size); 365 366 if (is_r200()) { 367 pci_read_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, &temp); 368 temp = (((temp & ~(0x0000000e)) | current_size->size_value) 369 | 0x00000001); 370 pci_write_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, temp); 371 pci_read_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, &temp); 372 } else { 373 pci_read_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, &temp); 374 temp = (((temp & ~(0x0000000e)) | current_size->size_value) 375 | 0x00000001); 376 pci_write_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, temp); 377 pci_read_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, &temp); 378 } 379 380 /* 381 * Get the address for the gart region. 382 * This is a bus address even on the alpha, b/c its 383 * used to program the agp master not the cpu 384 */ 385 pci_read_config_dword(agp_bridge->dev, AGP_APBASE, &temp); 386 addr = (temp & PCI_BASE_ADDRESS_MEM_MASK); 387 agp_bridge->gart_bus_addr = addr; 388 389 /* Calculate the agp offset */ 390 for (i = 0; i < value->num_entries / 1024; i++, addr += 0x00400000) { 391 writel(virt_to_gart(ati_generic_private.gatt_pages[i]->real) | 1, 392 page_dir.remapped+GET_PAGE_DIR_OFF(addr)); 393 readl(page_dir.remapped+GET_PAGE_DIR_OFF(addr)); /* PCI Posting. */ 394 } 395 396 return 0; 397} 398 399static int ati_free_gatt_table(struct agp_bridge_data *bridge) 400{ 401 struct ati_page_map page_dir; 402 403 page_dir.real = (unsigned long *)agp_bridge->gatt_table_real; 404 page_dir.remapped = (unsigned long __iomem *)agp_bridge->gatt_table; 405 406 ati_free_gatt_pages(); 407 ati_free_page_map(&page_dir); 408 return 0; 409} 410 411static const struct agp_bridge_driver ati_generic_bridge = { 412 .owner = THIS_MODULE, 413 .aperture_sizes = ati_generic_sizes, 414 .size_type = LVL2_APER_SIZE, 415 .num_aperture_sizes = 7, 416 .configure = ati_configure, 417 .fetch_size = ati_fetch_size, 418 .cleanup = ati_cleanup, 419 .tlb_flush = ati_tlbflush, 420 .mask_memory = agp_generic_mask_memory, 421 .masks = ati_generic_masks, 422 .agp_enable = agp_generic_enable, 423 .cache_flush = global_cache_flush, 424 .create_gatt_table = ati_create_gatt_table, 425 .free_gatt_table = ati_free_gatt_table, 426 .insert_memory = ati_insert_memory, 427 .remove_memory = ati_remove_memory, 428 .alloc_by_type = agp_generic_alloc_by_type, 429 .free_by_type = agp_generic_free_by_type, 430 .agp_alloc_page = agp_generic_alloc_page, 431 .agp_destroy_page = agp_generic_destroy_page, 432 .agp_type_to_mask_type = agp_generic_type_to_mask_type, 433}; 434 435 436static struct agp_device_ids ati_agp_device_ids[] __devinitdata = 437{ 438 { 439 .device_id = PCI_DEVICE_ID_ATI_RS100, 440 .chipset_name = "IGP320/M", 441 }, 442 { 443 .device_id = PCI_DEVICE_ID_ATI_RS200, 444 .chipset_name = "IGP330/340/345/350/M", 445 }, 446 { 447 .device_id = PCI_DEVICE_ID_ATI_RS200_B, 448 .chipset_name = "IGP345M", 449 }, 450 { 451 .device_id = PCI_DEVICE_ID_ATI_RS250, 452 .chipset_name = "IGP7000/M", 453 }, 454 { 455 .device_id = PCI_DEVICE_ID_ATI_RS300_100, 456 .chipset_name = "IGP9100/M", 457 }, 458 { 459 .device_id = PCI_DEVICE_ID_ATI_RS300_133, 460 .chipset_name = "IGP9100/M", 461 }, 462 { 463 .device_id = PCI_DEVICE_ID_ATI_RS300_166, 464 .chipset_name = "IGP9100/M", 465 }, 466 { 467 .device_id = PCI_DEVICE_ID_ATI_RS300_200, 468 .chipset_name = "IGP9100/M", 469 }, 470 { 471 .device_id = PCI_DEVICE_ID_ATI_RS350_200, 472 .chipset_name = "IGP9100/M", 473 }, 474 { }, /* dummy final entry, always present */ 475}; 476 477static int __devinit agp_ati_probe(struct pci_dev *pdev, 478 const struct pci_device_id *ent) 479{ 480 struct agp_device_ids *devs = ati_agp_device_ids; 481 struct agp_bridge_data *bridge; 482 u8 cap_ptr; 483 int j; 484 485 cap_ptr = pci_find_capability(pdev, PCI_CAP_ID_AGP); 486 if (!cap_ptr) 487 return -ENODEV; 488 489 /* probe for known chipsets */ 490 for (j = 0; devs[j].chipset_name; j++) { 491 if (pdev->device == devs[j].device_id) 492 goto found; 493 } 494 495 printk(KERN_ERR PFX 496 "Unsupported Ati chipset (device id: %04x)\n", pdev->device); 497 return -ENODEV; 498 499found: 500 bridge = agp_alloc_bridge(); 501 if (!bridge) 502 return -ENOMEM; 503 504 bridge->dev = pdev; 505 bridge->capndx = cap_ptr; 506 507 bridge->driver = &ati_generic_bridge; 508 509 printk(KERN_INFO PFX "Detected Ati %s chipset\n", 510 devs[j].chipset_name); 511 512 /* Fill in the mode register */ 513 pci_read_config_dword(pdev, 514 bridge->capndx+PCI_AGP_STATUS, 515 &bridge->mode); 516 517 pci_set_drvdata(pdev, bridge); 518 return agp_add_bridge(bridge); 519} 520 521static void __devexit agp_ati_remove(struct pci_dev *pdev) 522{ 523 struct agp_bridge_data *bridge = pci_get_drvdata(pdev); 524 525 agp_remove_bridge(bridge); 526 agp_put_bridge(bridge); 527} 528 529static struct pci_device_id agp_ati_pci_table[] = { 530 { 531 .class = (PCI_CLASS_BRIDGE_HOST << 8), 532 .class_mask = ~0, 533 .vendor = PCI_VENDOR_ID_ATI, 534 .device = PCI_ANY_ID, 535 .subvendor = PCI_ANY_ID, 536 .subdevice = PCI_ANY_ID, 537 }, 538 { } 539}; 540 541MODULE_DEVICE_TABLE(pci, agp_ati_pci_table); 542 543static struct pci_driver agp_ati_pci_driver = { 544 .name = "agpgart-ati", 545 .id_table = agp_ati_pci_table, 546 .probe = agp_ati_probe, 547 .remove = agp_ati_remove, 548#ifdef CONFIG_PM 549 .suspend = agp_ati_suspend, 550 .resume = agp_ati_resume, 551#endif 552}; 553 554static int __init agp_ati_init(void) 555{ 556 if (agp_off) 557 return -EINVAL; 558 return pci_register_driver(&agp_ati_pci_driver); 559} 560 561static void __exit agp_ati_cleanup(void) 562{ 563 pci_unregister_driver(&agp_ati_pci_driver); 564} 565 566module_init(agp_ati_init); 567module_exit(agp_ati_cleanup); 568 569MODULE_AUTHOR("Dave Jones <davej@codemonkey.org.uk>"); 570MODULE_LICENSE("GPL and additional rights"); 571 572