ati-agp.c revision 0ea27d9f2fb5b998063323bff47ab87891ced9e2
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/agp_backend.h> 10#include <asm/agp.h> 11#include "agp.h" 12 13#define ATI_GART_MMBASE_ADDR 0x14 14#define ATI_RS100_APSIZE 0xac 15#define ATI_RS100_IG_AGPMODE 0xb0 16#define ATI_RS300_APSIZE 0xf8 17#define ATI_RS300_IG_AGPMODE 0xfc 18#define ATI_GART_FEATURE_ID 0x00 19#define ATI_GART_BASE 0x04 20#define ATI_GART_CACHE_SZBASE 0x08 21#define ATI_GART_CACHE_CNTRL 0x0c 22#define ATI_GART_CACHE_ENTRY_CNTRL 0x10 23 24 25static struct aper_size_info_lvl2 ati_generic_sizes[7] = 26{ 27 {2048, 524288, 0x0000000c}, 28 {1024, 262144, 0x0000000a}, 29 {512, 131072, 0x00000008}, 30 {256, 65536, 0x00000006}, 31 {128, 32768, 0x00000004}, 32 {64, 16384, 0x00000002}, 33 {32, 8192, 0x00000000} 34}; 35 36static struct gatt_mask ati_generic_masks[] = 37{ 38 { .mask = 1, .type = 0} 39}; 40 41 42 43typedef struct _ati_page_map { 44 unsigned long *real; 45 unsigned long __iomem *remapped; 46} ati_page_map; 47 48static struct _ati_generic_private { 49 volatile u8 __iomem *registers; 50 ati_page_map **gatt_pages; 51 int num_tables; 52} ati_generic_private; 53 54static int ati_create_page_map(ati_page_map *page_map) 55{ 56 int i, err = 0; 57 58 page_map->real = (unsigned long *) __get_free_page(GFP_KERNEL); 59 if (page_map->real == NULL) 60 return -ENOMEM; 61 62 SetPageReserved(virt_to_page(page_map->real)); 63 err = map_page_into_agp(virt_to_page(page_map->real)); 64 page_map->remapped = ioremap_nocache(virt_to_gart(page_map->real), 65 PAGE_SIZE); 66 if (page_map->remapped == NULL || err) { 67 ClearPageReserved(virt_to_page(page_map->real)); 68 free_page((unsigned long) page_map->real); 69 page_map->real = NULL; 70 return -ENOMEM; 71 } 72 /*CACHE_FLUSH();*/ 73 global_cache_flush(); 74 75 for(i = 0; i < PAGE_SIZE / sizeof(unsigned long); i++) { 76 writel(agp_bridge->scratch_page, page_map->remapped+i); 77 readl(page_map->remapped+i); /* PCI Posting. */ 78 } 79 80 return 0; 81} 82 83 84static void ati_free_page_map(ati_page_map *page_map) 85{ 86 unmap_page_from_agp(virt_to_page(page_map->real)); 87 iounmap(page_map->remapped); 88 ClearPageReserved(virt_to_page(page_map->real)); 89 free_page((unsigned long) page_map->real); 90} 91 92 93static void ati_free_gatt_pages(void) 94{ 95 int i; 96 ati_page_map **tables; 97 ati_page_map *entry; 98 99 tables = ati_generic_private.gatt_pages; 100 for(i = 0; i < ati_generic_private.num_tables; i++) { 101 entry = tables[i]; 102 if (entry != NULL) { 103 if (entry->real != NULL) 104 ati_free_page_map(entry); 105 kfree(entry); 106 } 107 } 108 kfree(tables); 109} 110 111 112static int ati_create_gatt_pages(int nr_tables) 113{ 114 ati_page_map **tables; 115 ati_page_map *entry; 116 int retval = 0; 117 int i; 118 119 tables = kzalloc((nr_tables + 1) * sizeof(ati_page_map *),GFP_KERNEL); 120 if (tables == NULL) 121 return -ENOMEM; 122 123 for (i = 0; i < nr_tables; i++) { 124 entry = kzalloc(sizeof(ati_page_map), GFP_KERNEL); 125 if (entry == NULL) { 126 while (i>0) { 127 kfree (tables[i-1]); 128 i--; 129 } 130 kfree (tables); 131 tables = NULL; 132 retval = -ENOMEM; 133 break; 134 } 135 tables[i] = entry; 136 retval = ati_create_page_map(entry); 137 if (retval != 0) break; 138 } 139 ati_generic_private.num_tables = nr_tables; 140 ati_generic_private.gatt_pages = tables; 141 142 if (retval != 0) ati_free_gatt_pages(); 143 144 return retval; 145} 146 147static int is_r200(void) 148{ 149 if ((agp_bridge->dev->device == PCI_DEVICE_ID_ATI_RS100) || 150 (agp_bridge->dev->device == PCI_DEVICE_ID_ATI_RS200) || 151 (agp_bridge->dev->device == PCI_DEVICE_ID_ATI_RS200_B) || 152 (agp_bridge->dev->device == PCI_DEVICE_ID_ATI_RS250)) 153 return 1; 154 return 0; 155} 156 157static int ati_fetch_size(void) 158{ 159 int i; 160 u32 temp; 161 struct aper_size_info_lvl2 *values; 162 163 if (is_r200()) 164 pci_read_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, &temp); 165 else 166 pci_read_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, &temp); 167 168 temp = (temp & 0x0000000e); 169 values = A_SIZE_LVL2(agp_bridge->driver->aperture_sizes); 170 for (i = 0; i < agp_bridge->driver->num_aperture_sizes; i++) { 171 if (temp == values[i].size_value) { 172 agp_bridge->previous_size = 173 agp_bridge->current_size = (void *) (values + i); 174 175 agp_bridge->aperture_size_idx = i; 176 return values[i].size; 177 } 178 } 179 180 return 0; 181} 182 183static void ati_tlbflush(struct agp_memory * mem) 184{ 185 writel(1, ati_generic_private.registers+ATI_GART_CACHE_CNTRL); 186 readl(ati_generic_private.registers+ATI_GART_CACHE_CNTRL); /* PCI Posting. */ 187} 188 189static void ati_cleanup(void) 190{ 191 struct aper_size_info_lvl2 *previous_size; 192 u32 temp; 193 194 previous_size = A_SIZE_LVL2(agp_bridge->previous_size); 195 196 /* Write back the previous size and disable gart translation */ 197 if (is_r200()) { 198 pci_read_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, &temp); 199 temp = ((temp & ~(0x0000000f)) | previous_size->size_value); 200 pci_write_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, temp); 201 } else { 202 pci_read_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, &temp); 203 temp = ((temp & ~(0x0000000f)) | previous_size->size_value); 204 pci_write_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, temp); 205 } 206 iounmap((volatile u8 __iomem *)ati_generic_private.registers); 207} 208 209 210static int ati_configure(void) 211{ 212 u32 temp; 213 214 /* Get the memory mapped registers */ 215 pci_read_config_dword(agp_bridge->dev, ATI_GART_MMBASE_ADDR, &temp); 216 temp = (temp & 0xfffff000); 217 ati_generic_private.registers = (volatile u8 __iomem *) ioremap(temp, 4096); 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/* 246 *Since we don't need contigious memory we just try 247 * to get the gatt table once 248 */ 249 250#define GET_PAGE_DIR_OFF(addr) (addr >> 22) 251#define GET_PAGE_DIR_IDX(addr) (GET_PAGE_DIR_OFF(addr) - \ 252 GET_PAGE_DIR_OFF(agp_bridge->gart_bus_addr)) 253#define GET_GATT_OFF(addr) ((addr & 0x003ff000) >> 12) 254#undef GET_GATT 255#define GET_GATT(addr) (ati_generic_private.gatt_pages[\ 256 GET_PAGE_DIR_IDX(addr)]->remapped) 257 258static int ati_insert_memory(struct agp_memory * mem, 259 off_t pg_start, int type) 260{ 261 int i, j, num_entries; 262 unsigned long __iomem *cur_gatt; 263 unsigned long addr; 264 265 num_entries = A_SIZE_LVL2(agp_bridge->current_size)->num_entries; 266 267 if (type != 0 || mem->type != 0) 268 return -EINVAL; 269 270 if ((pg_start + mem->page_count) > num_entries) 271 return -EINVAL; 272 273 j = pg_start; 274 while (j < (pg_start + mem->page_count)) { 275 addr = (j * PAGE_SIZE) + agp_bridge->gart_bus_addr; 276 cur_gatt = GET_GATT(addr); 277 if (!PGE_EMPTY(agp_bridge,readl(cur_gatt+GET_GATT_OFF(addr)))) 278 return -EBUSY; 279 j++; 280 } 281 282 if (mem->is_flushed == FALSE) { 283 /*CACHE_FLUSH(); */ 284 global_cache_flush(); 285 mem->is_flushed = TRUE; 286 } 287 288 for (i = 0, j = pg_start; i < mem->page_count; i++, j++) { 289 addr = (j * PAGE_SIZE) + agp_bridge->gart_bus_addr; 290 cur_gatt = GET_GATT(addr); 291 writel(agp_bridge->driver->mask_memory(agp_bridge, 292 mem->memory[i], mem->type), cur_gatt+GET_GATT_OFF(addr)); 293 readl(cur_gatt+GET_GATT_OFF(addr)); /* PCI Posting. */ 294 } 295 agp_bridge->driver->tlb_flush(mem); 296 return 0; 297} 298 299static int ati_remove_memory(struct agp_memory * mem, off_t pg_start, 300 int type) 301{ 302 int i; 303 unsigned long __iomem *cur_gatt; 304 unsigned long addr; 305 306 if (type != 0 || mem->type != 0) { 307 return -EINVAL; 308 } 309 for (i = pg_start; i < (mem->page_count + pg_start); i++) { 310 addr = (i * PAGE_SIZE) + agp_bridge->gart_bus_addr; 311 cur_gatt = GET_GATT(addr); 312 writel(agp_bridge->scratch_page, cur_gatt+GET_GATT_OFF(addr)); 313 readl(cur_gatt+GET_GATT_OFF(addr)); /* PCI Posting. */ 314 } 315 316 agp_bridge->driver->tlb_flush(mem); 317 return 0; 318} 319 320static int ati_create_gatt_table(struct agp_bridge_data *bridge) 321{ 322 struct aper_size_info_lvl2 *value; 323 ati_page_map page_dir; 324 unsigned long addr; 325 int retval; 326 u32 temp; 327 int i; 328 struct aper_size_info_lvl2 *current_size; 329 330 value = A_SIZE_LVL2(agp_bridge->current_size); 331 retval = ati_create_page_map(&page_dir); 332 if (retval != 0) 333 return retval; 334 335 retval = ati_create_gatt_pages(value->num_entries / 1024); 336 if (retval != 0) { 337 ati_free_page_map(&page_dir); 338 return retval; 339 } 340 341 agp_bridge->gatt_table_real = (u32 *)page_dir.real; 342 agp_bridge->gatt_table = (u32 __iomem *) page_dir.remapped; 343 agp_bridge->gatt_bus_addr = virt_to_gart(page_dir.real); 344 345 /* Write out the size register */ 346 current_size = A_SIZE_LVL2(agp_bridge->current_size); 347 348 if (is_r200()) { 349 pci_read_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, &temp); 350 temp = (((temp & ~(0x0000000e)) | current_size->size_value) 351 | 0x00000001); 352 pci_write_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, temp); 353 pci_read_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, &temp); 354 } else { 355 pci_read_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, &temp); 356 temp = (((temp & ~(0x0000000e)) | current_size->size_value) 357 | 0x00000001); 358 pci_write_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, temp); 359 pci_read_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, &temp); 360 } 361 362 /* 363 * Get the address for the gart region. 364 * This is a bus address even on the alpha, b/c its 365 * used to program the agp master not the cpu 366 */ 367 pci_read_config_dword(agp_bridge->dev, AGP_APBASE, &temp); 368 addr = (temp & PCI_BASE_ADDRESS_MEM_MASK); 369 agp_bridge->gart_bus_addr = addr; 370 371 /* Calculate the agp offset */ 372 for(i = 0; i < value->num_entries / 1024; i++, addr += 0x00400000) { 373 writel(virt_to_gart(ati_generic_private.gatt_pages[i]->real) | 1, 374 page_dir.remapped+GET_PAGE_DIR_OFF(addr)); 375 readl(page_dir.remapped+GET_PAGE_DIR_OFF(addr)); /* PCI Posting. */ 376 } 377 378 return 0; 379} 380 381static int ati_free_gatt_table(struct agp_bridge_data *bridge) 382{ 383 ati_page_map page_dir; 384 385 page_dir.real = (unsigned long *)agp_bridge->gatt_table_real; 386 page_dir.remapped = (unsigned long __iomem *)agp_bridge->gatt_table; 387 388 ati_free_gatt_pages(); 389 ati_free_page_map(&page_dir); 390 return 0; 391} 392 393static struct agp_bridge_driver ati_generic_bridge = { 394 .owner = THIS_MODULE, 395 .aperture_sizes = ati_generic_sizes, 396 .size_type = LVL2_APER_SIZE, 397 .num_aperture_sizes = 7, 398 .configure = ati_configure, 399 .fetch_size = ati_fetch_size, 400 .cleanup = ati_cleanup, 401 .tlb_flush = ati_tlbflush, 402 .mask_memory = agp_generic_mask_memory, 403 .masks = ati_generic_masks, 404 .agp_enable = agp_generic_enable, 405 .cache_flush = global_cache_flush, 406 .create_gatt_table = ati_create_gatt_table, 407 .free_gatt_table = ati_free_gatt_table, 408 .insert_memory = ati_insert_memory, 409 .remove_memory = ati_remove_memory, 410 .alloc_by_type = agp_generic_alloc_by_type, 411 .free_by_type = agp_generic_free_by_type, 412 .agp_alloc_page = agp_generic_alloc_page, 413 .agp_destroy_page = agp_generic_destroy_page, 414}; 415 416 417static struct agp_device_ids ati_agp_device_ids[] __devinitdata = 418{ 419 { 420 .device_id = PCI_DEVICE_ID_ATI_RS100, 421 .chipset_name = "IGP320/M", 422 }, 423 { 424 .device_id = PCI_DEVICE_ID_ATI_RS200, 425 .chipset_name = "IGP330/340/345/350/M", 426 }, 427 { 428 .device_id = PCI_DEVICE_ID_ATI_RS200_B, 429 .chipset_name = "IGP345M", 430 }, 431 { 432 .device_id = PCI_DEVICE_ID_ATI_RS250, 433 .chipset_name = "IGP7000/M", 434 }, 435 { 436 .device_id = PCI_DEVICE_ID_ATI_RS300_100, 437 .chipset_name = "IGP9100/M", 438 }, 439 { 440 .device_id = PCI_DEVICE_ID_ATI_RS300_133, 441 .chipset_name = "IGP9100/M", 442 }, 443 { 444 .device_id = PCI_DEVICE_ID_ATI_RS300_166, 445 .chipset_name = "IGP9100/M", 446 }, 447 { 448 .device_id = PCI_DEVICE_ID_ATI_RS300_200, 449 .chipset_name = "IGP9100/M", 450 }, 451 { }, /* dummy final entry, always present */ 452}; 453 454static int __devinit agp_ati_probe(struct pci_dev *pdev, 455 const struct pci_device_id *ent) 456{ 457 struct agp_device_ids *devs = ati_agp_device_ids; 458 struct agp_bridge_data *bridge; 459 u8 cap_ptr; 460 int j; 461 462 cap_ptr = pci_find_capability(pdev, PCI_CAP_ID_AGP); 463 if (!cap_ptr) 464 return -ENODEV; 465 466 /* probe for known chipsets */ 467 for (j = 0; devs[j].chipset_name; j++) { 468 if (pdev->device == devs[j].device_id) 469 goto found; 470 } 471 472 printk(KERN_ERR PFX 473 "Unsupported Ati chipset (device id: %04x)\n", pdev->device); 474 return -ENODEV; 475 476found: 477 bridge = agp_alloc_bridge(); 478 if (!bridge) 479 return -ENOMEM; 480 481 bridge->dev = pdev; 482 bridge->capndx = cap_ptr; 483 484 bridge->driver = &ati_generic_bridge; 485 486 487 printk(KERN_INFO PFX "Detected Ati %s chipset\n", 488 devs[j].chipset_name); 489 490 /* Fill in the mode register */ 491 pci_read_config_dword(pdev, 492 bridge->capndx+PCI_AGP_STATUS, 493 &bridge->mode); 494 495 pci_set_drvdata(pdev, bridge); 496 return agp_add_bridge(bridge); 497} 498 499static void __devexit agp_ati_remove(struct pci_dev *pdev) 500{ 501 struct agp_bridge_data *bridge = pci_get_drvdata(pdev); 502 503 agp_remove_bridge(bridge); 504 agp_put_bridge(bridge); 505} 506 507static struct pci_device_id agp_ati_pci_table[] = { 508 { 509 .class = (PCI_CLASS_BRIDGE_HOST << 8), 510 .class_mask = ~0, 511 .vendor = PCI_VENDOR_ID_ATI, 512 .device = PCI_ANY_ID, 513 .subvendor = PCI_ANY_ID, 514 .subdevice = PCI_ANY_ID, 515 }, 516 { } 517}; 518 519MODULE_DEVICE_TABLE(pci, agp_ati_pci_table); 520 521static struct pci_driver agp_ati_pci_driver = { 522 .name = "agpgart-ati", 523 .id_table = agp_ati_pci_table, 524 .probe = agp_ati_probe, 525 .remove = agp_ati_remove, 526}; 527 528static int __init agp_ati_init(void) 529{ 530 if (agp_off) 531 return -EINVAL; 532 return pci_register_driver(&agp_ati_pci_driver); 533} 534 535static void __exit agp_ati_cleanup(void) 536{ 537 pci_unregister_driver(&agp_ati_pci_driver); 538} 539 540module_init(agp_ati_init); 541module_exit(agp_ati_cleanup); 542 543MODULE_AUTHOR("Dave Jones <davej@codemonkey.org.uk>"); 544MODULE_LICENSE("GPL and additional rights"); 545 546