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 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 45 typedef struct _ati_page_map { 46 unsigned long *real; 47 unsigned long __iomem *remapped; 48 } ati_page_map; 49 50 static struct _ati_generic_private { 51 volatile u8 __iomem *registers; 52 ati_page_map **gatt_pages; 53 int num_tables; 54 } ati_generic_private; 55 56 static int ati_create_page_map(ati_page_map *page_map) 57 { 58 int i, err = 0; 59 60 page_map->real = (unsigned long *) __get_free_page(GFP_KERNEL); 61 if (page_map->real == NULL) 62 return -ENOMEM; 63 64 SetPageReserved(virt_to_page(page_map->real)); 65 err = map_page_into_agp(virt_to_page(page_map->real)); 66 page_map->remapped = ioremap_nocache(virt_to_gart(page_map->real), 67 PAGE_SIZE); 68 if (page_map->remapped == NULL || err) { 69 ClearPageReserved(virt_to_page(page_map->real)); 70 free_page((unsigned long) page_map->real); 71 page_map->real = NULL; 72 return -ENOMEM; 73 } 74 /*CACHE_FLUSH();*/ 75 global_cache_flush(); 76 77 for (i = 0; i < PAGE_SIZE / sizeof(unsigned long); i++) { 78 writel(agp_bridge->scratch_page, page_map->remapped+i); 79 readl(page_map->remapped+i); /* PCI Posting. */ 80 } 81 82 return 0; 83 } 84 85 86 static void ati_free_page_map(ati_page_map *page_map) 87 { 88 unmap_page_from_agp(virt_to_page(page_map->real)); 89 iounmap(page_map->remapped); 90 ClearPageReserved(virt_to_page(page_map->real)); 91 free_page((unsigned long) page_map->real); 92 } 93 94 95 static void ati_free_gatt_pages(void) 96 { 97 int i; 98 ati_page_map **tables; 99 ati_page_map *entry; 100 101 tables = ati_generic_private.gatt_pages; 102 for (i = 0; i < ati_generic_private.num_tables; i++) { 103 entry = tables[i]; 104 if (entry != NULL) { 105 if (entry->real != NULL) 106 ati_free_page_map(entry); 107 kfree(entry); 108 } 109 } 110 kfree(tables); 111 } 112 113 114 static int ati_create_gatt_pages(int nr_tables) 115 { 116 ati_page_map **tables; 117 ati_page_map *entry; 118 int retval = 0; 119 int i; 120 121 tables = kzalloc((nr_tables + 1) * sizeof(ati_page_map *),GFP_KERNEL); 122 if (tables == NULL) 123 return -ENOMEM; 124 125 for (i = 0; i < nr_tables; i++) { 126 entry = kzalloc(sizeof(ati_page_map), GFP_KERNEL); 127 if (entry == NULL) { 128 while (i>0) { 129 kfree (tables[i-1]); 130 i--; 131 } 132 kfree (tables); 133 tables = NULL; 134 retval = -ENOMEM; 135 break; 136 } 137 tables[i] = entry; 138 retval = ati_create_page_map(entry); 139 if (retval != 0) break; 140 } 141 ati_generic_private.num_tables = nr_tables; 142 ati_generic_private.gatt_pages = tables; 143 144 if (retval != 0) ati_free_gatt_pages(); 145 146 return retval; 147 } 148 149 static int is_r200(void) 150 { 151 if ((agp_bridge->dev->device == PCI_DEVICE_ID_ATI_RS100) || 152 (agp_bridge->dev->device == PCI_DEVICE_ID_ATI_RS200) || 153 (agp_bridge->dev->device == PCI_DEVICE_ID_ATI_RS200_B) || 154 (agp_bridge->dev->device == PCI_DEVICE_ID_ATI_RS250)) 155 return 1; 156 return 0; 157 } 158 159 static int ati_fetch_size(void) 160 { 161 int i; 162 u32 temp; 163 struct aper_size_info_lvl2 *values; 164 165 if (is_r200()) 166 pci_read_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, &temp); 167 else 168 pci_read_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, &temp); 169 170 temp = (temp & 0x0000000e); 171 values = A_SIZE_LVL2(agp_bridge->driver->aperture_sizes); 172 for (i = 0; i < agp_bridge->driver->num_aperture_sizes; i++) { 173 if (temp == values[i].size_value) { 174 agp_bridge->previous_size = 175 agp_bridge->current_size = (void *) (values + i); 176 177 agp_bridge->aperture_size_idx = i; 178 return values[i].size; 179 } 180 } 181 182 return 0; 183 } 184 185 static void ati_tlbflush(struct agp_memory * mem) 186 { 187 writel(1, ati_generic_private.registers+ATI_GART_CACHE_CNTRL); 188 readl(ati_generic_private.registers+ATI_GART_CACHE_CNTRL); /* PCI Posting. */ 189 } 190 191 static void ati_cleanup(void) 192 { 193 struct aper_size_info_lvl2 *previous_size; 194 u32 temp; 195 196 previous_size = A_SIZE_LVL2(agp_bridge->previous_size); 197 198 /* Write back the previous size and disable gart translation */ 199 if (is_r200()) { 200 pci_read_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, &temp); 201 temp = ((temp & ~(0x0000000f)) | previous_size->size_value); 202 pci_write_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, temp); 203 } else { 204 pci_read_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, &temp); 205 temp = ((temp & ~(0x0000000f)) | previous_size->size_value); 206 pci_write_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, temp); 207 } 208 iounmap((volatile u8 __iomem *)ati_generic_private.registers); 209 } 210 211 212 static int ati_configure(void) 213 { 214 u32 temp; 215 216 /* Get the memory mapped registers */ 217 pci_read_config_dword(agp_bridge->dev, ATI_GART_MMBASE_ADDR, &temp); 218 temp = (temp & 0xfffff000); 219 ati_generic_private.registers = (volatile u8 __iomem *) ioremap(temp, 4096); 220 221 if (is_r200()) 222 pci_write_config_dword(agp_bridge->dev, ATI_RS100_IG_AGPMODE, 0x20000); 223 else 224 pci_write_config_dword(agp_bridge->dev, ATI_RS300_IG_AGPMODE, 0x20000); 225 226 /* address to map too */ 227 /* 228 pci_read_config_dword(agp_bridge.dev, AGP_APBASE, &temp); 229 agp_bridge.gart_bus_addr = (temp & PCI_BASE_ADDRESS_MEM_MASK); 230 printk(KERN_INFO PFX "IGP320 gart_bus_addr: %x\n", agp_bridge.gart_bus_addr); 231 */ 232 writel(0x60000, ati_generic_private.registers+ATI_GART_FEATURE_ID); 233 readl(ati_generic_private.registers+ATI_GART_FEATURE_ID); /* PCI Posting.*/ 234 235 /* SIGNALED_SYSTEM_ERROR @ NB_STATUS */ 236 pci_read_config_dword(agp_bridge->dev, 4, &temp); 237 pci_write_config_dword(agp_bridge->dev, 4, temp | (1<<14)); 238 239 /* Write out the address of the gatt table */ 240 writel(agp_bridge->gatt_bus_addr, ati_generic_private.registers+ATI_GART_BASE); 241 readl(ati_generic_private.registers+ATI_GART_BASE); /* PCI Posting. */ 242 243 return 0; 244 } 245 246 247 #ifdef CONFIG_PM 248 static int agp_ati_resume(struct pci_dev *dev) 249 { 250 pci_restore_state(dev); 251 252 return ati_configure(); 253 } 254 255 static int agp_ati_suspend(struct pci_dev *dev, pm_message_t state) 256 { 257 pci_save_state(dev); 258 259 return 0; 260 } 261 #endif 262 263 /* 264 *Since we don't need contigious 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) 275 276 static 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 } 316 317 static 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 } 337 338 static int ati_create_gatt_table(struct agp_bridge_data *bridge) 339 { 340 struct aper_size_info_lvl2 *value; 341 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 } 398 399 static int ati_free_gatt_table(struct agp_bridge_data *bridge) 400 { 401 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 } 410 411 static 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 }; 433 434 435 static struct agp_device_ids ati_agp_device_ids[] __devinitdata = 436 { 437 { 438 .device_id = PCI_DEVICE_ID_ATI_RS100, 439 .chipset_name = "IGP320/M", 440 }, 441 { 442 .device_id = PCI_DEVICE_ID_ATI_RS200, 443 .chipset_name = "IGP330/340/345/350/M", 444 }, 445 { 446 .device_id = PCI_DEVICE_ID_ATI_RS200_B, 447 .chipset_name = "IGP345M", 448 }, 449 { 450 .device_id = PCI_DEVICE_ID_ATI_RS250, 451 .chipset_name = "IGP7000/M", 452 }, 453 { 454 .device_id = PCI_DEVICE_ID_ATI_RS300_100, 455 .chipset_name = "IGP9100/M", 456 }, 457 { 458 .device_id = PCI_DEVICE_ID_ATI_RS300_133, 459 .chipset_name = "IGP9100/M", 460 }, 461 { 462 .device_id = PCI_DEVICE_ID_ATI_RS300_166, 463 .chipset_name = "IGP9100/M", 464 }, 465 { 466 .device_id = PCI_DEVICE_ID_ATI_RS300_200, 467 .chipset_name = "IGP9100/M", 468 }, 469 { 470 .device_id = PCI_DEVICE_ID_ATI_RS350_200, 471 .chipset_name = "IGP9100/M", 472 }, 473 { }, /* dummy final entry, always present */ 474 }; 475 476 static int __devinit agp_ati_probe(struct pci_dev *pdev, 477 const struct pci_device_id *ent) 478 { 479 struct agp_device_ids *devs = ati_agp_device_ids; 480 struct agp_bridge_data *bridge; 481 u8 cap_ptr; 482 int j; 483 484 cap_ptr = pci_find_capability(pdev, PCI_CAP_ID_AGP); 485 if (!cap_ptr) 486 return -ENODEV; 487 488 /* probe for known chipsets */ 489 for (j = 0; devs[j].chipset_name; j++) { 490 if (pdev->device == devs[j].device_id) 491 goto found; 492 } 493 494 printk(KERN_ERR PFX 495 "Unsupported Ati chipset (device id: %04x)\n", pdev->device); 496 return -ENODEV; 497 498 found: 499 bridge = agp_alloc_bridge(); 500 if (!bridge) 501 return -ENOMEM; 502 503 bridge->dev = pdev; 504 bridge->capndx = cap_ptr; 505 506 bridge->driver = &ati_generic_bridge; 507 508 509 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 } 520 521 static 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 } 528 529 static 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 }; 540 541 MODULE_DEVICE_TABLE(pci, agp_ati_pci_table); 542 543 static 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 .resume = agp_ati_resume, 550 .suspend = agp_ati_suspend, 551 #endif 552 }; 553 554 static int __init agp_ati_init(void) 555 { 556 if (agp_off) 557 return -EINVAL; 558 return pci_register_driver(&agp_ati_pci_driver); 559 } 560 561 static void __exit agp_ati_cleanup(void) 562 { 563 pci_unregister_driver(&agp_ati_pci_driver); 564 } 565 566 module_init(agp_ati_init); 567 module_exit(agp_ati_cleanup); 568 569 MODULE_AUTHOR("Dave Jones <davej@codemonkey.org.uk>"); 570 MODULE_LICENSE("GPL and additional rights"); 571 572