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 = kmalloc((nr_tables + 1) * sizeof(ati_page_map *), 122 GFP_KERNEL); 123 if (tables == NULL) 124 return -ENOMEM; 125 126 memset(tables, 0, sizeof(ati_page_map *) * (nr_tables + 1)); 127 for (i = 0; i < nr_tables; i++) { 128 entry = kmalloc(sizeof(ati_page_map), GFP_KERNEL); 129 if (entry == NULL) { 130 while (i>0) { 131 kfree (tables[i-1]); 132 i--; 133 } 134 kfree (tables); 135 tables = NULL; 136 retval = -ENOMEM; 137 break; 138 } 139 memset(entry, 0, sizeof(ati_page_map)); 140 tables[i] = entry; 141 retval = ati_create_page_map(entry); 142 if (retval != 0) break; 143 } 144 ati_generic_private.num_tables = nr_tables; 145 ati_generic_private.gatt_pages = tables; 146 147 if (retval != 0) ati_free_gatt_pages(); 148 149 return retval; 150 } 151 152 static int is_r200(void) 153 { 154 if ((agp_bridge->dev->device == PCI_DEVICE_ID_ATI_RS100) || 155 (agp_bridge->dev->device == PCI_DEVICE_ID_ATI_RS200) || 156 (agp_bridge->dev->device == PCI_DEVICE_ID_ATI_RS200_B) || 157 (agp_bridge->dev->device == PCI_DEVICE_ID_ATI_RS250)) 158 return 1; 159 return 0; 160 } 161 162 static int ati_fetch_size(void) 163 { 164 int i; 165 u32 temp; 166 struct aper_size_info_lvl2 *values; 167 168 if (is_r200()) 169 pci_read_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, &temp); 170 else 171 pci_read_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, &temp); 172 173 temp = (temp & 0x0000000e); 174 values = A_SIZE_LVL2(agp_bridge->driver->aperture_sizes); 175 for (i = 0; i < agp_bridge->driver->num_aperture_sizes; i++) { 176 if (temp == values[i].size_value) { 177 agp_bridge->previous_size = 178 agp_bridge->current_size = (void *) (values + i); 179 180 agp_bridge->aperture_size_idx = i; 181 return values[i].size; 182 } 183 } 184 185 return 0; 186 } 187 188 static void ati_tlbflush(struct agp_memory * mem) 189 { 190 writel(1, ati_generic_private.registers+ATI_GART_CACHE_CNTRL); 191 readl(ati_generic_private.registers+ATI_GART_CACHE_CNTRL); /* PCI Posting. */ 192 } 193 194 static void ati_cleanup(void) 195 { 196 struct aper_size_info_lvl2 *previous_size; 197 u32 temp; 198 199 previous_size = A_SIZE_LVL2(agp_bridge->previous_size); 200 201 /* Write back the previous size and disable gart translation */ 202 if (is_r200()) { 203 pci_read_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, &temp); 204 temp = ((temp & ~(0x0000000f)) | previous_size->size_value); 205 pci_write_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, temp); 206 } else { 207 pci_read_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, &temp); 208 temp = ((temp & ~(0x0000000f)) | previous_size->size_value); 209 pci_write_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, temp); 210 } 211 iounmap((volatile u8 __iomem *)ati_generic_private.registers); 212 } 213 214 215 static int ati_configure(void) 216 { 217 u32 temp; 218 219 /* Get the memory mapped registers */ 220 pci_read_config_dword(agp_bridge->dev, ATI_GART_MMBASE_ADDR, &temp); 221 temp = (temp & 0xfffff000); 222 ati_generic_private.registers = (volatile u8 __iomem *) ioremap(temp, 4096); 223 224 if (is_r200()) 225 pci_write_config_dword(agp_bridge->dev, ATI_RS100_IG_AGPMODE, 0x20000); 226 else 227 pci_write_config_dword(agp_bridge->dev, ATI_RS300_IG_AGPMODE, 0x20000); 228 229 /* address to map too */ 230 /* 231 pci_read_config_dword(agp_bridge.dev, AGP_APBASE, &temp); 232 agp_bridge.gart_bus_addr = (temp & PCI_BASE_ADDRESS_MEM_MASK); 233 printk(KERN_INFO PFX "IGP320 gart_bus_addr: %x\n", agp_bridge.gart_bus_addr); 234 */ 235 writel(0x60000, ati_generic_private.registers+ATI_GART_FEATURE_ID); 236 readl(ati_generic_private.registers+ATI_GART_FEATURE_ID); /* PCI Posting.*/ 237 238 /* SIGNALED_SYSTEM_ERROR @ NB_STATUS */ 239 pci_read_config_dword(agp_bridge->dev, 4, &temp); 240 pci_write_config_dword(agp_bridge->dev, 4, temp | (1<<14)); 241 242 /* Write out the address of the gatt table */ 243 writel(agp_bridge->gatt_bus_addr, ati_generic_private.registers+ATI_GART_BASE); 244 readl(ati_generic_private.registers+ATI_GART_BASE); /* PCI Posting. */ 245 246 return 0; 247 } 248 249 250 /* 251 *Since we don't need contigious memory we just try 252 * to get the gatt table once 253 */ 254 255 #define GET_PAGE_DIR_OFF(addr) (addr >> 22) 256 #define GET_PAGE_DIR_IDX(addr) (GET_PAGE_DIR_OFF(addr) - \ 257 GET_PAGE_DIR_OFF(agp_bridge->gart_bus_addr)) 258 #define GET_GATT_OFF(addr) ((addr & 0x003ff000) >> 12) 259 #undef GET_GATT 260 #define GET_GATT(addr) (ati_generic_private.gatt_pages[\ 261 GET_PAGE_DIR_IDX(addr)]->remapped) 262 263 static int ati_insert_memory(struct agp_memory * mem, 264 off_t pg_start, int type) 265 { 266 int i, j, num_entries; 267 unsigned long __iomem *cur_gatt; 268 unsigned long addr; 269 270 num_entries = A_SIZE_LVL2(agp_bridge->current_size)->num_entries; 271 272 if (type != 0 || mem->type != 0) 273 return -EINVAL; 274 275 if ((pg_start + mem->page_count) > num_entries) 276 return -EINVAL; 277 278 j = pg_start; 279 while (j < (pg_start + mem->page_count)) { 280 addr = (j * PAGE_SIZE) + agp_bridge->gart_bus_addr; 281 cur_gatt = GET_GATT(addr); 282 if (!PGE_EMPTY(agp_bridge,readl(cur_gatt+GET_GATT_OFF(addr)))) 283 return -EBUSY; 284 j++; 285 } 286 287 if (mem->is_flushed == FALSE) { 288 /*CACHE_FLUSH(); */ 289 global_cache_flush(); 290 mem->is_flushed = TRUE; 291 } 292 293 for (i = 0, j = pg_start; i < mem->page_count; i++, j++) { 294 addr = (j * PAGE_SIZE) + agp_bridge->gart_bus_addr; 295 cur_gatt = GET_GATT(addr); 296 writel(agp_bridge->driver->mask_memory(agp_bridge, 297 mem->memory[i], mem->type), cur_gatt+GET_GATT_OFF(addr)); 298 readl(cur_gatt+GET_GATT_OFF(addr)); /* PCI Posting. */ 299 } 300 agp_bridge->driver->tlb_flush(mem); 301 return 0; 302 } 303 304 static int ati_remove_memory(struct agp_memory * mem, off_t pg_start, 305 int type) 306 { 307 int i; 308 unsigned long __iomem *cur_gatt; 309 unsigned long addr; 310 311 if (type != 0 || mem->type != 0) { 312 return -EINVAL; 313 } 314 for (i = pg_start; i < (mem->page_count + pg_start); i++) { 315 addr = (i * PAGE_SIZE) + agp_bridge->gart_bus_addr; 316 cur_gatt = GET_GATT(addr); 317 writel(agp_bridge->scratch_page, cur_gatt+GET_GATT_OFF(addr)); 318 readl(cur_gatt+GET_GATT_OFF(addr)); /* PCI Posting. */ 319 } 320 321 agp_bridge->driver->tlb_flush(mem); 322 return 0; 323 } 324 325 static int ati_create_gatt_table(struct agp_bridge_data *bridge) 326 { 327 struct aper_size_info_lvl2 *value; 328 ati_page_map page_dir; 329 unsigned long addr; 330 int retval; 331 u32 temp; 332 int i; 333 struct aper_size_info_lvl2 *current_size; 334 335 value = A_SIZE_LVL2(agp_bridge->current_size); 336 retval = ati_create_page_map(&page_dir); 337 if (retval != 0) 338 return retval; 339 340 retval = ati_create_gatt_pages(value->num_entries / 1024); 341 if (retval != 0) { 342 ati_free_page_map(&page_dir); 343 return retval; 344 } 345 346 agp_bridge->gatt_table_real = (u32 *)page_dir.real; 347 agp_bridge->gatt_table = (u32 __iomem *) page_dir.remapped; 348 agp_bridge->gatt_bus_addr = virt_to_gart(page_dir.real); 349 350 /* Write out the size register */ 351 current_size = A_SIZE_LVL2(agp_bridge->current_size); 352 353 if (is_r200()) { 354 pci_read_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, &temp); 355 temp = (((temp & ~(0x0000000e)) | current_size->size_value) 356 | 0x00000001); 357 pci_write_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, temp); 358 pci_read_config_dword(agp_bridge->dev, ATI_RS100_APSIZE, &temp); 359 } else { 360 pci_read_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, &temp); 361 temp = (((temp & ~(0x0000000e)) | current_size->size_value) 362 | 0x00000001); 363 pci_write_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, temp); 364 pci_read_config_dword(agp_bridge->dev, ATI_RS300_APSIZE, &temp); 365 } 366 367 /* 368 * Get the address for the gart region. 369 * This is a bus address even on the alpha, b/c its 370 * used to program the agp master not the cpu 371 */ 372 pci_read_config_dword(agp_bridge->dev, AGP_APBASE, &temp); 373 addr = (temp & PCI_BASE_ADDRESS_MEM_MASK); 374 agp_bridge->gart_bus_addr = addr; 375 376 /* Calculate the agp offset */ 377 for(i = 0; i < value->num_entries / 1024; i++, addr += 0x00400000) { 378 writel(virt_to_gart(ati_generic_private.gatt_pages[i]->real) | 1, 379 page_dir.remapped+GET_PAGE_DIR_OFF(addr)); 380 readl(page_dir.remapped+GET_PAGE_DIR_OFF(addr)); /* PCI Posting. */ 381 } 382 383 return 0; 384 } 385 386 static int ati_free_gatt_table(struct agp_bridge_data *bridge) 387 { 388 ati_page_map page_dir; 389 390 page_dir.real = (unsigned long *)agp_bridge->gatt_table_real; 391 page_dir.remapped = (unsigned long __iomem *)agp_bridge->gatt_table; 392 393 ati_free_gatt_pages(); 394 ati_free_page_map(&page_dir); 395 return 0; 396 } 397 398 static struct agp_bridge_driver ati_generic_bridge = { 399 .owner = THIS_MODULE, 400 .aperture_sizes = ati_generic_sizes, 401 .size_type = LVL2_APER_SIZE, 402 .num_aperture_sizes = 7, 403 .configure = ati_configure, 404 .fetch_size = ati_fetch_size, 405 .cleanup = ati_cleanup, 406 .tlb_flush = ati_tlbflush, 407 .mask_memory = agp_generic_mask_memory, 408 .masks = ati_generic_masks, 409 .agp_enable = agp_generic_enable, 410 .cache_flush = global_cache_flush, 411 .create_gatt_table = ati_create_gatt_table, 412 .free_gatt_table = ati_free_gatt_table, 413 .insert_memory = ati_insert_memory, 414 .remove_memory = ati_remove_memory, 415 .alloc_by_type = agp_generic_alloc_by_type, 416 .free_by_type = agp_generic_free_by_type, 417 .agp_alloc_page = agp_generic_alloc_page, 418 .agp_destroy_page = agp_generic_destroy_page, 419 }; 420 421 422 static struct agp_device_ids ati_agp_device_ids[] __devinitdata = 423 { 424 { 425 .device_id = PCI_DEVICE_ID_ATI_RS100, 426 .chipset_name = "IGP320/M", 427 }, 428 { 429 .device_id = PCI_DEVICE_ID_ATI_RS200, 430 .chipset_name = "IGP330/340/345/350/M", 431 }, 432 { 433 .device_id = PCI_DEVICE_ID_ATI_RS200_B, 434 .chipset_name = "IGP345M", 435 }, 436 { 437 .device_id = PCI_DEVICE_ID_ATI_RS250, 438 .chipset_name = "IGP7000/M", 439 }, 440 { 441 .device_id = PCI_DEVICE_ID_ATI_RS300_100, 442 .chipset_name = "IGP9100/M", 443 }, 444 { 445 .device_id = PCI_DEVICE_ID_ATI_RS300_133, 446 .chipset_name = "IGP9100/M", 447 }, 448 { 449 .device_id = PCI_DEVICE_ID_ATI_RS300_166, 450 .chipset_name = "IGP9100/M", 451 }, 452 { 453 .device_id = PCI_DEVICE_ID_ATI_RS300_200, 454 .chipset_name = "IGP9100/M", 455 }, 456 { }, /* dummy final entry, always present */ 457 }; 458 459 static int __devinit agp_ati_probe(struct pci_dev *pdev, 460 const struct pci_device_id *ent) 461 { 462 struct agp_device_ids *devs = ati_agp_device_ids; 463 struct agp_bridge_data *bridge; 464 u8 cap_ptr; 465 int j; 466 467 cap_ptr = pci_find_capability(pdev, PCI_CAP_ID_AGP); 468 if (!cap_ptr) 469 return -ENODEV; 470 471 /* probe for known chipsets */ 472 for (j = 0; devs[j].chipset_name; j++) { 473 if (pdev->device == devs[j].device_id) 474 goto found; 475 } 476 477 printk(KERN_ERR PFX 478 "Unsupported Ati chipset (device id: %04x)\n", pdev->device); 479 return -ENODEV; 480 481 found: 482 bridge = agp_alloc_bridge(); 483 if (!bridge) 484 return -ENOMEM; 485 486 bridge->dev = pdev; 487 bridge->capndx = cap_ptr; 488 489 bridge->driver = &ati_generic_bridge; 490 491 492 printk(KERN_INFO PFX "Detected Ati %s chipset\n", 493 devs[j].chipset_name); 494 495 /* Fill in the mode register */ 496 pci_read_config_dword(pdev, 497 bridge->capndx+PCI_AGP_STATUS, 498 &bridge->mode); 499 500 pci_set_drvdata(pdev, bridge); 501 return agp_add_bridge(bridge); 502 } 503 504 static void __devexit agp_ati_remove(struct pci_dev *pdev) 505 { 506 struct agp_bridge_data *bridge = pci_get_drvdata(pdev); 507 508 agp_remove_bridge(bridge); 509 agp_put_bridge(bridge); 510 } 511 512 static struct pci_device_id agp_ati_pci_table[] = { 513 { 514 .class = (PCI_CLASS_BRIDGE_HOST << 8), 515 .class_mask = ~0, 516 .vendor = PCI_VENDOR_ID_ATI, 517 .device = PCI_ANY_ID, 518 .subvendor = PCI_ANY_ID, 519 .subdevice = PCI_ANY_ID, 520 }, 521 { } 522 }; 523 524 MODULE_DEVICE_TABLE(pci, agp_ati_pci_table); 525 526 static struct pci_driver agp_ati_pci_driver = { 527 .name = "agpgart-ati", 528 .id_table = agp_ati_pci_table, 529 .probe = agp_ati_probe, 530 .remove = agp_ati_remove, 531 }; 532 533 static int __init agp_ati_init(void) 534 { 535 if (agp_off) 536 return -EINVAL; 537 return pci_register_driver(&agp_ati_pci_driver); 538 } 539 540 static void __exit agp_ati_cleanup(void) 541 { 542 pci_unregister_driver(&agp_ati_pci_driver); 543 } 544 545 module_init(agp_ati_init); 546 module_exit(agp_ati_cleanup); 547 548 MODULE_AUTHOR("Dave Jones <davej@codemonkey.org.uk>"); 549 MODULE_LICENSE("GPL and additional rights"); 550 551