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 25 static 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 36 static struct gatt_mask ati_generic_masks[] = 37 { 38 { .mask = 1, .type = 0} 39 }; 40 41 42 43 typedef struct _ati_page_map { 44 unsigned long *real; 45 unsigned long __iomem *remapped; 46 } ati_page_map; 47 48 static struct _ati_generic_private { 49 volatile u8 __iomem *registers; 50 ati_page_map **gatt_pages; 51 int num_tables; 52 } ati_generic_private; 53 54 static 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 84 static 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 93 static 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 } 110 111 112 static 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 = kmalloc((nr_tables + 1) * sizeof(ati_page_map *), 120 GFP_KERNEL); 121 if (tables == NULL) 122 return -ENOMEM; 123 124 memset(tables, 0, sizeof(ati_page_map *) * (nr_tables + 1)); 125 for (i = 0; i < nr_tables; i++) { 126 entry = kmalloc(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 memset(entry, 0, sizeof(ati_page_map)); 138 tables[i] = entry; 139 retval = ati_create_page_map(entry); 140 if (retval != 0) break; 141 } 142 ati_generic_private.num_tables = nr_tables; 143 ati_generic_private.gatt_pages = tables; 144 145 if (retval != 0) ati_free_gatt_pages(); 146 147 return retval; 148 } 149 150 static int is_r200(void) 151 { 152 if ((agp_bridge->dev->device == PCI_DEVICE_ID_ATI_RS100) || 153 (agp_bridge->dev->device == PCI_DEVICE_ID_ATI_RS200) || 154 (agp_bridge->dev->device == PCI_DEVICE_ID_ATI_RS200_B) || 155 (agp_bridge->dev->device == PCI_DEVICE_ID_ATI_RS250)) 156 return 1; 157 return 0; 158 } 159 160 static int ati_fetch_size(void) 161 { 162 int i; 163 u32 temp; 164 struct aper_size_info_lvl2 *values; 165 166 if (is_r200()) 167 pci_read_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, &temp); 168 else 169 pci_read_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, &temp); 170 171 temp = (temp & 0x0000000e); 172 values = A_SIZE_LVL2(agp_bridge->driver->aperture_sizes); 173 for (i = 0; i < agp_bridge->driver->num_aperture_sizes; i++) { 174 if (temp == values[i].size_value) { 175 agp_bridge->previous_size = 176 agp_bridge->current_size = (void *) (values + i); 177 178 agp_bridge->aperture_size_idx = i; 179 return values[i].size; 180 } 181 } 182 183 return 0; 184 } 185 186 static void ati_tlbflush(struct agp_memory * mem) 187 { 188 writel(1, ati_generic_private.registers+ATI_GART_CACHE_CNTRL); 189 readl(ati_generic_private.registers+ATI_GART_CACHE_CNTRL); /* PCI Posting. */ 190 } 191 192 static void ati_cleanup(void) 193 { 194 struct aper_size_info_lvl2 *previous_size; 195 u32 temp; 196 197 previous_size = A_SIZE_LVL2(agp_bridge->previous_size); 198 199 /* Write back the previous size and disable gart translation */ 200 if (is_r200()) { 201 pci_read_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, &temp); 202 temp = ((temp & ~(0x0000000f)) | previous_size->size_value); 203 pci_write_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, temp); 204 } else { 205 pci_read_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, &temp); 206 temp = ((temp & ~(0x0000000f)) | previous_size->size_value); 207 pci_write_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, temp); 208 } 209 iounmap((volatile u8 __iomem *)ati_generic_private.registers); 210 } 211 212 213 static int ati_configure(void) 214 { 215 u32 temp; 216 217 /* Get the memory mapped registers */ 218 pci_read_config_dword(agp_bridge->dev, ATI_GART_MMBASE_ADDR, &temp); 219 temp = (temp & 0xfffff000); 220 ati_generic_private.registers = (volatile u8 __iomem *) ioremap(temp, 4096); 221 222 if (is_r200()) 223 pci_write_config_dword(agp_bridge->dev, ATI_RS100_IG_AGPMODE, 0x20000); 224 else 225 pci_write_config_dword(agp_bridge->dev, ATI_RS300_IG_AGPMODE, 0x20000); 226 227 /* address to map too */ 228 /* 229 pci_read_config_dword(agp_bridge.dev, AGP_APBASE, &temp); 230 agp_bridge.gart_bus_addr = (temp & PCI_BASE_ADDRESS_MEM_MASK); 231 printk(KERN_INFO PFX "IGP320 gart_bus_addr: %x\n", agp_bridge.gart_bus_addr); 232 */ 233 writel(0x60000, ati_generic_private.registers+ATI_GART_FEATURE_ID); 234 readl(ati_generic_private.registers+ATI_GART_FEATURE_ID); /* PCI Posting.*/ 235 236 /* SIGNALED_SYSTEM_ERROR @ NB_STATUS */ 237 pci_read_config_dword(agp_bridge->dev, 4, &temp); 238 pci_write_config_dword(agp_bridge->dev, 4, temp | (1<<14)); 239 240 /* Write out the address of the gatt table */ 241 writel(agp_bridge->gatt_bus_addr, ati_generic_private.registers+ATI_GART_BASE); 242 readl(ati_generic_private.registers+ATI_GART_BASE); /* PCI Posting. */ 243 244 return 0; 245 } 246 247 248 /* 249 *Since we don't need contigious memory we just try 250 * to get the gatt table once 251 */ 252 253 #define GET_PAGE_DIR_OFF(addr) (addr >> 22) 254 #define GET_PAGE_DIR_IDX(addr) (GET_PAGE_DIR_OFF(addr) - \ 255 GET_PAGE_DIR_OFF(agp_bridge->gart_bus_addr)) 256 #define GET_GATT_OFF(addr) ((addr & 0x003ff000) >> 12) 257 #undef GET_GATT 258 #define GET_GATT(addr) (ati_generic_private.gatt_pages[\ 259 GET_PAGE_DIR_IDX(addr)]->remapped) 260 261 static int ati_insert_memory(struct agp_memory * mem, 262 off_t pg_start, int type) 263 { 264 int i, j, num_entries; 265 unsigned long __iomem *cur_gatt; 266 unsigned long addr; 267 268 num_entries = A_SIZE_LVL2(agp_bridge->current_size)->num_entries; 269 270 if (type != 0 || mem->type != 0) 271 return -EINVAL; 272 273 if ((pg_start + mem->page_count) > num_entries) 274 return -EINVAL; 275 276 j = pg_start; 277 while (j < (pg_start + mem->page_count)) { 278 addr = (j * PAGE_SIZE) + agp_bridge->gart_bus_addr; 279 cur_gatt = GET_GATT(addr); 280 if (!PGE_EMPTY(agp_bridge,readl(cur_gatt+GET_GATT_OFF(addr)))) 281 return -EBUSY; 282 j++; 283 } 284 285 if (mem->is_flushed == FALSE) { 286 /*CACHE_FLUSH(); */ 287 global_cache_flush(); 288 mem->is_flushed = TRUE; 289 } 290 291 for (i = 0, j = pg_start; i < mem->page_count; i++, j++) { 292 addr = (j * PAGE_SIZE) + agp_bridge->gart_bus_addr; 293 cur_gatt = GET_GATT(addr); 294 writel(agp_bridge->driver->mask_memory(agp_bridge, 295 mem->memory[i], mem->type), cur_gatt+GET_GATT_OFF(addr)); 296 readl(cur_gatt+GET_GATT_OFF(addr)); /* PCI Posting. */ 297 } 298 agp_bridge->driver->tlb_flush(mem); 299 return 0; 300 } 301 302 static int ati_remove_memory(struct agp_memory * mem, off_t pg_start, 303 int type) 304 { 305 int i; 306 unsigned long __iomem *cur_gatt; 307 unsigned long addr; 308 309 if (type != 0 || mem->type != 0) { 310 return -EINVAL; 311 } 312 for (i = pg_start; i < (mem->page_count + pg_start); i++) { 313 addr = (i * PAGE_SIZE) + agp_bridge->gart_bus_addr; 314 cur_gatt = GET_GATT(addr); 315 writel(agp_bridge->scratch_page, cur_gatt+GET_GATT_OFF(addr)); 316 readl(cur_gatt+GET_GATT_OFF(addr)); /* PCI Posting. */ 317 } 318 319 agp_bridge->driver->tlb_flush(mem); 320 return 0; 321 } 322 323 static int ati_create_gatt_table(struct agp_bridge_data *bridge) 324 { 325 struct aper_size_info_lvl2 *value; 326 ati_page_map page_dir; 327 unsigned long addr; 328 int retval; 329 u32 temp; 330 int i; 331 struct aper_size_info_lvl2 *current_size; 332 333 value = A_SIZE_LVL2(agp_bridge->current_size); 334 retval = ati_create_page_map(&page_dir); 335 if (retval != 0) 336 return retval; 337 338 retval = ati_create_gatt_pages(value->num_entries / 1024); 339 if (retval != 0) { 340 ati_free_page_map(&page_dir); 341 return retval; 342 } 343 344 agp_bridge->gatt_table_real = (u32 *)page_dir.real; 345 agp_bridge->gatt_table = (u32 __iomem *) page_dir.remapped; 346 agp_bridge->gatt_bus_addr = virt_to_gart(page_dir.real); 347 348 /* Write out the size register */ 349 current_size = A_SIZE_LVL2(agp_bridge->current_size); 350 351 if (is_r200()) { 352 pci_read_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, &temp); 353 temp = (((temp & ~(0x0000000e)) | current_size->size_value) 354 | 0x00000001); 355 pci_write_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, temp); 356 pci_read_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, &temp); 357 } else { 358 pci_read_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, &temp); 359 temp = (((temp & ~(0x0000000e)) | current_size->size_value) 360 | 0x00000001); 361 pci_write_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, temp); 362 pci_read_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, &temp); 363 } 364 365 /* 366 * Get the address for the gart region. 367 * This is a bus address even on the alpha, b/c its 368 * used to program the agp master not the cpu 369 */ 370 pci_read_config_dword(agp_bridge->dev, AGP_APBASE, &temp); 371 addr = (temp & PCI_BASE_ADDRESS_MEM_MASK); 372 agp_bridge->gart_bus_addr = addr; 373 374 /* Calculate the agp offset */ 375 for(i = 0; i < value->num_entries / 1024; i++, addr += 0x00400000) { 376 writel(virt_to_gart(ati_generic_private.gatt_pages[i]->real) | 1, 377 page_dir.remapped+GET_PAGE_DIR_OFF(addr)); 378 readl(page_dir.remapped+GET_PAGE_DIR_OFF(addr)); /* PCI Posting. */ 379 } 380 381 return 0; 382 } 383 384 static int ati_free_gatt_table(struct agp_bridge_data *bridge) 385 { 386 ati_page_map page_dir; 387 388 page_dir.real = (unsigned long *)agp_bridge->gatt_table_real; 389 page_dir.remapped = (unsigned long __iomem *)agp_bridge->gatt_table; 390 391 ati_free_gatt_pages(); 392 ati_free_page_map(&page_dir); 393 return 0; 394 } 395 396 static struct agp_bridge_driver ati_generic_bridge = { 397 .owner = THIS_MODULE, 398 .aperture_sizes = ati_generic_sizes, 399 .size_type = LVL2_APER_SIZE, 400 .num_aperture_sizes = 7, 401 .configure = ati_configure, 402 .fetch_size = ati_fetch_size, 403 .cleanup = ati_cleanup, 404 .tlb_flush = ati_tlbflush, 405 .mask_memory = agp_generic_mask_memory, 406 .masks = ati_generic_masks, 407 .agp_enable = agp_generic_enable, 408 .cache_flush = global_cache_flush, 409 .create_gatt_table = ati_create_gatt_table, 410 .free_gatt_table = ati_free_gatt_table, 411 .insert_memory = ati_insert_memory, 412 .remove_memory = ati_remove_memory, 413 .alloc_by_type = agp_generic_alloc_by_type, 414 .free_by_type = agp_generic_free_by_type, 415 .agp_alloc_page = agp_generic_alloc_page, 416 .agp_destroy_page = agp_generic_destroy_page, 417 }; 418 419 420 static struct agp_device_ids ati_agp_device_ids[] __devinitdata = 421 { 422 { 423 .device_id = PCI_DEVICE_ID_ATI_RS100, 424 .chipset_name = "IGP320/M", 425 }, 426 { 427 .device_id = PCI_DEVICE_ID_ATI_RS200, 428 .chipset_name = "IGP330/340/345/350/M", 429 }, 430 { 431 .device_id = PCI_DEVICE_ID_ATI_RS200_B, 432 .chipset_name = "IGP345M", 433 }, 434 { 435 .device_id = PCI_DEVICE_ID_ATI_RS250, 436 .chipset_name = "IGP7000/M", 437 }, 438 { 439 .device_id = PCI_DEVICE_ID_ATI_RS300_100, 440 .chipset_name = "IGP9100/M", 441 }, 442 { 443 .device_id = PCI_DEVICE_ID_ATI_RS300_133, 444 .chipset_name = "IGP9100/M", 445 }, 446 { 447 .device_id = PCI_DEVICE_ID_ATI_RS300_166, 448 .chipset_name = "IGP9100/M", 449 }, 450 { 451 .device_id = PCI_DEVICE_ID_ATI_RS300_200, 452 .chipset_name = "IGP9100/M", 453 }, 454 { }, /* dummy final entry, always present */ 455 }; 456 457 static int __devinit agp_ati_probe(struct pci_dev *pdev, 458 const struct pci_device_id *ent) 459 { 460 struct agp_device_ids *devs = ati_agp_device_ids; 461 struct agp_bridge_data *bridge; 462 u8 cap_ptr; 463 int j; 464 465 cap_ptr = pci_find_capability(pdev, PCI_CAP_ID_AGP); 466 if (!cap_ptr) 467 return -ENODEV; 468 469 /* probe for known chipsets */ 470 for (j = 0; devs[j].chipset_name; j++) { 471 if (pdev->device == devs[j].device_id) 472 goto found; 473 } 474 475 printk(KERN_ERR PFX 476 "Unsupported Ati chipset (device id: %04x)\n", pdev->device); 477 return -ENODEV; 478 479 found: 480 bridge = agp_alloc_bridge(); 481 if (!bridge) 482 return -ENOMEM; 483 484 bridge->dev = pdev; 485 bridge->capndx = cap_ptr; 486 487 bridge->driver = &ati_generic_bridge; 488 489 490 printk(KERN_INFO PFX "Detected Ati %s chipset\n", 491 devs[j].chipset_name); 492 493 /* Fill in the mode register */ 494 pci_read_config_dword(pdev, 495 bridge->capndx+PCI_AGP_STATUS, 496 &bridge->mode); 497 498 pci_set_drvdata(pdev, bridge); 499 return agp_add_bridge(bridge); 500 } 501 502 static void __devexit agp_ati_remove(struct pci_dev *pdev) 503 { 504 struct agp_bridge_data *bridge = pci_get_drvdata(pdev); 505 506 agp_remove_bridge(bridge); 507 agp_put_bridge(bridge); 508 } 509 510 static struct pci_device_id agp_ati_pci_table[] = { 511 { 512 .class = (PCI_CLASS_BRIDGE_HOST << 8), 513 .class_mask = ~0, 514 .vendor = PCI_VENDOR_ID_ATI, 515 .device = PCI_ANY_ID, 516 .subvendor = PCI_ANY_ID, 517 .subdevice = PCI_ANY_ID, 518 }, 519 { } 520 }; 521 522 MODULE_DEVICE_TABLE(pci, agp_ati_pci_table); 523 524 static struct pci_driver agp_ati_pci_driver = { 525 .name = "agpgart-ati", 526 .id_table = agp_ati_pci_table, 527 .probe = agp_ati_probe, 528 .remove = agp_ati_remove, 529 }; 530 531 static int __init agp_ati_init(void) 532 { 533 if (agp_off) 534 return -EINVAL; 535 return pci_register_driver(&agp_ati_pci_driver); 536 } 537 538 static void __exit agp_ati_cleanup(void) 539 { 540 pci_unregister_driver(&agp_ati_pci_driver); 541 } 542 543 module_init(agp_ati_init); 544 module_exit(agp_ati_cleanup); 545 546 MODULE_AUTHOR("Dave Jones <davej@codemonkey.org.uk>"); 547 MODULE_LICENSE("GPL and additional rights"); 548 549