1/* 2 * AGPGART driver. 3 * Copyright (C) 2004 Silicon Graphics, Inc. 4 * Copyright (C) 2002-2005 Dave Jones. 5 * Copyright (C) 1999 Jeff Hartmann. 6 * Copyright (C) 1999 Precision Insight, Inc. 7 * Copyright (C) 1999 Xi Graphics, Inc. 8 * 9 * Permission is hereby granted, free of charge, to any person obtaining a 10 * copy of this software and associated documentation files (the "Software"), 11 * to deal in the Software without restriction, including without limitation 12 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 13 * and/or sell copies of the Software, and to permit persons to whom the 14 * Software is furnished to do so, subject to the following conditions: 15 * 16 * The above copyright notice and this permission notice shall be included 17 * in all copies or substantial portions of the Software. 18 * 19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS 20 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 21 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 22 * JEFF HARTMANN, OR ANY OTHER CONTRIBUTORS BE LIABLE FOR ANY CLAIM, 23 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR 24 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE 25 * OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 26 * 27 * TODO: 28 * - Allocate more than order 0 pages to avoid too much linear map splitting. 29 */ 30#include <linux/module.h> 31#include <linux/pci.h> 32#include <linux/pagemap.h> 33#include <linux/miscdevice.h> 34#include <linux/pm.h> 35#include <linux/agp_backend.h> 36#include <linux/vmalloc.h> 37#include <linux/dma-mapping.h> 38#include <linux/mm.h> 39#include <linux/sched.h> 40#include <linux/slab.h> 41#include <asm/io.h> 42#include <asm/cacheflush.h> 43#include <asm/pgtable.h> 44#include "agp.h" 45 46__u32 *agp_gatt_table; 47int agp_memory_reserved; 48 49/* 50 * Needed by the Nforce GART driver for the time being. Would be 51 * nice to do this some other way instead of needing this export. 52 */ 53EXPORT_SYMBOL_GPL(agp_memory_reserved); 54 55/* 56 * Generic routines for handling agp_memory structures - 57 * They use the basic page allocation routines to do the brunt of the work. 58 */ 59 60void agp_free_key(int key) 61{ 62 if (key < 0) 63 return; 64 65 if (key < MAXKEY) 66 clear_bit(key, agp_bridge->key_list); 67} 68EXPORT_SYMBOL(agp_free_key); 69 70 71static int agp_get_key(void) 72{ 73 int bit; 74 75 bit = find_first_zero_bit(agp_bridge->key_list, MAXKEY); 76 if (bit < MAXKEY) { 77 set_bit(bit, agp_bridge->key_list); 78 return bit; 79 } 80 return -1; 81} 82 83/* 84 * Use kmalloc if possible for the page list. Otherwise fall back to 85 * vmalloc. This speeds things up and also saves memory for small AGP 86 * regions. 87 */ 88 89void agp_alloc_page_array(size_t size, struct agp_memory *mem) 90{ 91 mem->pages = NULL; 92 93 if (size <= 2*PAGE_SIZE) 94 mem->pages = kmalloc(size, GFP_KERNEL | __GFP_NOWARN); 95 if (mem->pages == NULL) { 96 mem->pages = vmalloc(size); 97 } 98} 99EXPORT_SYMBOL(agp_alloc_page_array); 100 101void agp_free_page_array(struct agp_memory *mem) 102{ 103 if (is_vmalloc_addr(mem->pages)) { 104 vfree(mem->pages); 105 } else { 106 kfree(mem->pages); 107 } 108} 109EXPORT_SYMBOL(agp_free_page_array); 110 111 112static struct agp_memory *agp_create_user_memory(unsigned long num_agp_pages) 113{ 114 struct agp_memory *new; 115 unsigned long alloc_size = num_agp_pages*sizeof(struct page *); 116 117 if (INT_MAX/sizeof(struct page *) < num_agp_pages) 118 return NULL; 119 120 new = kzalloc(sizeof(struct agp_memory), GFP_KERNEL); 121 if (new == NULL) 122 return NULL; 123 124 new->key = agp_get_key(); 125 126 if (new->key < 0) { 127 kfree(new); 128 return NULL; 129 } 130 131 agp_alloc_page_array(alloc_size, new); 132 133 if (new->pages == NULL) { 134 agp_free_key(new->key); 135 kfree(new); 136 return NULL; 137 } 138 new->num_scratch_pages = 0; 139 return new; 140} 141 142struct agp_memory *agp_create_memory(int scratch_pages) 143{ 144 struct agp_memory *new; 145 146 new = kzalloc(sizeof(struct agp_memory), GFP_KERNEL); 147 if (new == NULL) 148 return NULL; 149 150 new->key = agp_get_key(); 151 152 if (new->key < 0) { 153 kfree(new); 154 return NULL; 155 } 156 157 agp_alloc_page_array(PAGE_SIZE * scratch_pages, new); 158 159 if (new->pages == NULL) { 160 agp_free_key(new->key); 161 kfree(new); 162 return NULL; 163 } 164 new->num_scratch_pages = scratch_pages; 165 new->type = AGP_NORMAL_MEMORY; 166 return new; 167} 168EXPORT_SYMBOL(agp_create_memory); 169 170/** 171 * agp_free_memory - free memory associated with an agp_memory pointer. 172 * 173 * @curr: agp_memory pointer to be freed. 174 * 175 * It is the only function that can be called when the backend is not owned 176 * by the caller. (So it can free memory on client death.) 177 */ 178void agp_free_memory(struct agp_memory *curr) 179{ 180 size_t i; 181 182 if (curr == NULL) 183 return; 184 185 if (curr->is_bound) 186 agp_unbind_memory(curr); 187 188 if (curr->type >= AGP_USER_TYPES) { 189 agp_generic_free_by_type(curr); 190 return; 191 } 192 193 if (curr->type != 0) { 194 curr->bridge->driver->free_by_type(curr); 195 return; 196 } 197 if (curr->page_count != 0) { 198 if (curr->bridge->driver->agp_destroy_pages) { 199 curr->bridge->driver->agp_destroy_pages(curr); 200 } else { 201 202 for (i = 0; i < curr->page_count; i++) { 203 curr->bridge->driver->agp_destroy_page( 204 curr->pages[i], 205 AGP_PAGE_DESTROY_UNMAP); 206 } 207 for (i = 0; i < curr->page_count; i++) { 208 curr->bridge->driver->agp_destroy_page( 209 curr->pages[i], 210 AGP_PAGE_DESTROY_FREE); 211 } 212 } 213 } 214 agp_free_key(curr->key); 215 agp_free_page_array(curr); 216 kfree(curr); 217} 218EXPORT_SYMBOL(agp_free_memory); 219 220#define ENTRIES_PER_PAGE (PAGE_SIZE / sizeof(unsigned long)) 221 222/** 223 * agp_allocate_memory - allocate a group of pages of a certain type. 224 * 225 * @page_count: size_t argument of the number of pages 226 * @type: u32 argument of the type of memory to be allocated. 227 * 228 * Every agp bridge device will allow you to allocate AGP_NORMAL_MEMORY which 229 * maps to physical ram. Any other type is device dependent. 230 * 231 * It returns NULL whenever memory is unavailable. 232 */ 233struct agp_memory *agp_allocate_memory(struct agp_bridge_data *bridge, 234 size_t page_count, u32 type) 235{ 236 int scratch_pages; 237 struct agp_memory *new; 238 size_t i; 239 int cur_memory; 240 241 if (!bridge) 242 return NULL; 243 244 cur_memory = atomic_read(&bridge->current_memory_agp); 245 if ((cur_memory + page_count > bridge->max_memory_agp) || 246 (cur_memory + page_count < page_count)) 247 return NULL; 248 249 if (type >= AGP_USER_TYPES) { 250 new = agp_generic_alloc_user(page_count, type); 251 if (new) 252 new->bridge = bridge; 253 return new; 254 } 255 256 if (type != 0) { 257 new = bridge->driver->alloc_by_type(page_count, type); 258 if (new) 259 new->bridge = bridge; 260 return new; 261 } 262 263 scratch_pages = (page_count + ENTRIES_PER_PAGE - 1) / ENTRIES_PER_PAGE; 264 265 new = agp_create_memory(scratch_pages); 266 267 if (new == NULL) 268 return NULL; 269 270 if (bridge->driver->agp_alloc_pages) { 271 if (bridge->driver->agp_alloc_pages(bridge, new, page_count)) { 272 agp_free_memory(new); 273 return NULL; 274 } 275 new->bridge = bridge; 276 return new; 277 } 278 279 for (i = 0; i < page_count; i++) { 280 struct page *page = bridge->driver->agp_alloc_page(bridge); 281 282 if (page == NULL) { 283 agp_free_memory(new); 284 return NULL; 285 } 286 new->pages[i] = page; 287 new->page_count++; 288 } 289 new->bridge = bridge; 290 291 return new; 292} 293EXPORT_SYMBOL(agp_allocate_memory); 294 295 296/* End - Generic routines for handling agp_memory structures */ 297 298 299static int agp_return_size(void) 300{ 301 int current_size; 302 void *temp; 303 304 temp = agp_bridge->current_size; 305 306 switch (agp_bridge->driver->size_type) { 307 case U8_APER_SIZE: 308 current_size = A_SIZE_8(temp)->size; 309 break; 310 case U16_APER_SIZE: 311 current_size = A_SIZE_16(temp)->size; 312 break; 313 case U32_APER_SIZE: 314 current_size = A_SIZE_32(temp)->size; 315 break; 316 case LVL2_APER_SIZE: 317 current_size = A_SIZE_LVL2(temp)->size; 318 break; 319 case FIXED_APER_SIZE: 320 current_size = A_SIZE_FIX(temp)->size; 321 break; 322 default: 323 current_size = 0; 324 break; 325 } 326 327 current_size -= (agp_memory_reserved / (1024*1024)); 328 if (current_size <0) 329 current_size = 0; 330 return current_size; 331} 332 333 334int agp_num_entries(void) 335{ 336 int num_entries; 337 void *temp; 338 339 temp = agp_bridge->current_size; 340 341 switch (agp_bridge->driver->size_type) { 342 case U8_APER_SIZE: 343 num_entries = A_SIZE_8(temp)->num_entries; 344 break; 345 case U16_APER_SIZE: 346 num_entries = A_SIZE_16(temp)->num_entries; 347 break; 348 case U32_APER_SIZE: 349 num_entries = A_SIZE_32(temp)->num_entries; 350 break; 351 case LVL2_APER_SIZE: 352 num_entries = A_SIZE_LVL2(temp)->num_entries; 353 break; 354 case FIXED_APER_SIZE: 355 num_entries = A_SIZE_FIX(temp)->num_entries; 356 break; 357 default: 358 num_entries = 0; 359 break; 360 } 361 362 num_entries -= agp_memory_reserved>>PAGE_SHIFT; 363 if (num_entries<0) 364 num_entries = 0; 365 return num_entries; 366} 367EXPORT_SYMBOL_GPL(agp_num_entries); 368 369 370/** 371 * agp_copy_info - copy bridge state information 372 * 373 * @info: agp_kern_info pointer. The caller should insure that this pointer is valid. 374 * 375 * This function copies information about the agp bridge device and the state of 376 * the agp backend into an agp_kern_info pointer. 377 */ 378int agp_copy_info(struct agp_bridge_data *bridge, struct agp_kern_info *info) 379{ 380 memset(info, 0, sizeof(struct agp_kern_info)); 381 if (!bridge) { 382 info->chipset = NOT_SUPPORTED; 383 return -EIO; 384 } 385 386 info->version.major = bridge->version->major; 387 info->version.minor = bridge->version->minor; 388 info->chipset = SUPPORTED; 389 info->device = bridge->dev; 390 if (bridge->mode & AGPSTAT_MODE_3_0) 391 info->mode = bridge->mode & ~AGP3_RESERVED_MASK; 392 else 393 info->mode = bridge->mode & ~AGP2_RESERVED_MASK; 394 info->aper_base = bridge->gart_bus_addr; 395 info->aper_size = agp_return_size(); 396 info->max_memory = bridge->max_memory_agp; 397 info->current_memory = atomic_read(&bridge->current_memory_agp); 398 info->cant_use_aperture = bridge->driver->cant_use_aperture; 399 info->vm_ops = bridge->vm_ops; 400 info->page_mask = ~0UL; 401 return 0; 402} 403EXPORT_SYMBOL(agp_copy_info); 404 405/* End - Routine to copy over information structure */ 406 407/* 408 * Routines for handling swapping of agp_memory into the GATT - 409 * These routines take agp_memory and insert them into the GATT. 410 * They call device specific routines to actually write to the GATT. 411 */ 412 413/** 414 * agp_bind_memory - Bind an agp_memory structure into the GATT. 415 * 416 * @curr: agp_memory pointer 417 * @pg_start: an offset into the graphics aperture translation table 418 * 419 * It returns -EINVAL if the pointer == NULL. 420 * It returns -EBUSY if the area of the table requested is already in use. 421 */ 422int agp_bind_memory(struct agp_memory *curr, off_t pg_start) 423{ 424 int ret_val; 425 426 if (curr == NULL) 427 return -EINVAL; 428 429 if (curr->is_bound) { 430 printk(KERN_INFO PFX "memory %p is already bound!\n", curr); 431 return -EINVAL; 432 } 433 if (!curr->is_flushed) { 434 curr->bridge->driver->cache_flush(); 435 curr->is_flushed = true; 436 } 437 438 ret_val = curr->bridge->driver->insert_memory(curr, pg_start, curr->type); 439 440 if (ret_val != 0) 441 return ret_val; 442 443 curr->is_bound = true; 444 curr->pg_start = pg_start; 445 spin_lock(&agp_bridge->mapped_lock); 446 list_add(&curr->mapped_list, &agp_bridge->mapped_list); 447 spin_unlock(&agp_bridge->mapped_lock); 448 449 return 0; 450} 451EXPORT_SYMBOL(agp_bind_memory); 452 453 454/** 455 * agp_unbind_memory - Removes an agp_memory structure from the GATT 456 * 457 * @curr: agp_memory pointer to be removed from the GATT. 458 * 459 * It returns -EINVAL if this piece of agp_memory is not currently bound to 460 * the graphics aperture translation table or if the agp_memory pointer == NULL 461 */ 462int agp_unbind_memory(struct agp_memory *curr) 463{ 464 int ret_val; 465 466 if (curr == NULL) 467 return -EINVAL; 468 469 if (!curr->is_bound) { 470 printk(KERN_INFO PFX "memory %p was not bound!\n", curr); 471 return -EINVAL; 472 } 473 474 ret_val = curr->bridge->driver->remove_memory(curr, curr->pg_start, curr->type); 475 476 if (ret_val != 0) 477 return ret_val; 478 479 curr->is_bound = false; 480 curr->pg_start = 0; 481 spin_lock(&curr->bridge->mapped_lock); 482 list_del(&curr->mapped_list); 483 spin_unlock(&curr->bridge->mapped_lock); 484 return 0; 485} 486EXPORT_SYMBOL(agp_unbind_memory); 487 488 489/* End - Routines for handling swapping of agp_memory into the GATT */ 490 491 492/* Generic Agp routines - Start */ 493static void agp_v2_parse_one(u32 *requested_mode, u32 *bridge_agpstat, u32 *vga_agpstat) 494{ 495 u32 tmp; 496 497 if (*requested_mode & AGP2_RESERVED_MASK) { 498 printk(KERN_INFO PFX "reserved bits set (%x) in mode 0x%x. Fixed.\n", 499 *requested_mode & AGP2_RESERVED_MASK, *requested_mode); 500 *requested_mode &= ~AGP2_RESERVED_MASK; 501 } 502 503 /* 504 * Some dumb bridges are programmed to disobey the AGP2 spec. 505 * This is likely a BIOS misprogramming rather than poweron default, or 506 * it would be a lot more common. 507 * https://bugs.freedesktop.org/show_bug.cgi?id=8816 508 * AGPv2 spec 6.1.9 states: 509 * The RATE field indicates the data transfer rates supported by this 510 * device. A.G.P. devices must report all that apply. 511 * Fix them up as best we can. 512 */ 513 switch (*bridge_agpstat & 7) { 514 case 4: 515 *bridge_agpstat |= (AGPSTAT2_2X | AGPSTAT2_1X); 516 printk(KERN_INFO PFX "BIOS bug. AGP bridge claims to only support x4 rate. " 517 "Fixing up support for x2 & x1\n"); 518 break; 519 case 2: 520 *bridge_agpstat |= AGPSTAT2_1X; 521 printk(KERN_INFO PFX "BIOS bug. AGP bridge claims to only support x2 rate. " 522 "Fixing up support for x1\n"); 523 break; 524 default: 525 break; 526 } 527 528 /* Check the speed bits make sense. Only one should be set. */ 529 tmp = *requested_mode & 7; 530 switch (tmp) { 531 case 0: 532 printk(KERN_INFO PFX "%s tried to set rate=x0. Setting to x1 mode.\n", current->comm); 533 *requested_mode |= AGPSTAT2_1X; 534 break; 535 case 1: 536 case 2: 537 break; 538 case 3: 539 *requested_mode &= ~(AGPSTAT2_1X); /* rate=2 */ 540 break; 541 case 4: 542 break; 543 case 5: 544 case 6: 545 case 7: 546 *requested_mode &= ~(AGPSTAT2_1X|AGPSTAT2_2X); /* rate=4*/ 547 break; 548 } 549 550 /* disable SBA if it's not supported */ 551 if (!((*bridge_agpstat & AGPSTAT_SBA) && (*vga_agpstat & AGPSTAT_SBA) && (*requested_mode & AGPSTAT_SBA))) 552 *bridge_agpstat &= ~AGPSTAT_SBA; 553 554 /* Set rate */ 555 if (!((*bridge_agpstat & AGPSTAT2_4X) && (*vga_agpstat & AGPSTAT2_4X) && (*requested_mode & AGPSTAT2_4X))) 556 *bridge_agpstat &= ~AGPSTAT2_4X; 557 558 if (!((*bridge_agpstat & AGPSTAT2_2X) && (*vga_agpstat & AGPSTAT2_2X) && (*requested_mode & AGPSTAT2_2X))) 559 *bridge_agpstat &= ~AGPSTAT2_2X; 560 561 if (!((*bridge_agpstat & AGPSTAT2_1X) && (*vga_agpstat & AGPSTAT2_1X) && (*requested_mode & AGPSTAT2_1X))) 562 *bridge_agpstat &= ~AGPSTAT2_1X; 563 564 /* Now we know what mode it should be, clear out the unwanted bits. */ 565 if (*bridge_agpstat & AGPSTAT2_4X) 566 *bridge_agpstat &= ~(AGPSTAT2_1X | AGPSTAT2_2X); /* 4X */ 567 568 if (*bridge_agpstat & AGPSTAT2_2X) 569 *bridge_agpstat &= ~(AGPSTAT2_1X | AGPSTAT2_4X); /* 2X */ 570 571 if (*bridge_agpstat & AGPSTAT2_1X) 572 *bridge_agpstat &= ~(AGPSTAT2_2X | AGPSTAT2_4X); /* 1X */ 573 574 /* Apply any errata. */ 575 if (agp_bridge->flags & AGP_ERRATA_FASTWRITES) 576 *bridge_agpstat &= ~AGPSTAT_FW; 577 578 if (agp_bridge->flags & AGP_ERRATA_SBA) 579 *bridge_agpstat &= ~AGPSTAT_SBA; 580 581 if (agp_bridge->flags & AGP_ERRATA_1X) { 582 *bridge_agpstat &= ~(AGPSTAT2_2X | AGPSTAT2_4X); 583 *bridge_agpstat |= AGPSTAT2_1X; 584 } 585 586 /* If we've dropped down to 1X, disable fast writes. */ 587 if (*bridge_agpstat & AGPSTAT2_1X) 588 *bridge_agpstat &= ~AGPSTAT_FW; 589} 590 591/* 592 * requested_mode = Mode requested by (typically) X. 593 * bridge_agpstat = PCI_AGP_STATUS from agp bridge. 594 * vga_agpstat = PCI_AGP_STATUS from graphic card. 595 */ 596static void agp_v3_parse_one(u32 *requested_mode, u32 *bridge_agpstat, u32 *vga_agpstat) 597{ 598 u32 origbridge=*bridge_agpstat, origvga=*vga_agpstat; 599 u32 tmp; 600 601 if (*requested_mode & AGP3_RESERVED_MASK) { 602 printk(KERN_INFO PFX "reserved bits set (%x) in mode 0x%x. Fixed.\n", 603 *requested_mode & AGP3_RESERVED_MASK, *requested_mode); 604 *requested_mode &= ~AGP3_RESERVED_MASK; 605 } 606 607 /* Check the speed bits make sense. */ 608 tmp = *requested_mode & 7; 609 if (tmp == 0) { 610 printk(KERN_INFO PFX "%s tried to set rate=x0. Setting to AGP3 x4 mode.\n", current->comm); 611 *requested_mode |= AGPSTAT3_4X; 612 } 613 if (tmp >= 3) { 614 printk(KERN_INFO PFX "%s tried to set rate=x%d. Setting to AGP3 x8 mode.\n", current->comm, tmp * 4); 615 *requested_mode = (*requested_mode & ~7) | AGPSTAT3_8X; 616 } 617 618 /* ARQSZ - Set the value to the maximum one. 619 * Don't allow the mode register to override values. */ 620 *bridge_agpstat = ((*bridge_agpstat & ~AGPSTAT_ARQSZ) | 621 max_t(u32,(*bridge_agpstat & AGPSTAT_ARQSZ),(*vga_agpstat & AGPSTAT_ARQSZ))); 622 623 /* Calibration cycle. 624 * Don't allow the mode register to override values. */ 625 *bridge_agpstat = ((*bridge_agpstat & ~AGPSTAT_CAL_MASK) | 626 min_t(u32,(*bridge_agpstat & AGPSTAT_CAL_MASK),(*vga_agpstat & AGPSTAT_CAL_MASK))); 627 628 /* SBA *must* be supported for AGP v3 */ 629 *bridge_agpstat |= AGPSTAT_SBA; 630 631 /* 632 * Set speed. 633 * Check for invalid speeds. This can happen when applications 634 * written before the AGP 3.0 standard pass AGP2.x modes to AGP3 hardware 635 */ 636 if (*requested_mode & AGPSTAT_MODE_3_0) { 637 /* 638 * Caller hasn't a clue what it is doing. Bridge is in 3.0 mode, 639 * have been passed a 3.0 mode, but with 2.x speed bits set. 640 * AGP2.x 4x -> AGP3.0 4x. 641 */ 642 if (*requested_mode & AGPSTAT2_4X) { 643 printk(KERN_INFO PFX "%s passes broken AGP3 flags (%x). Fixed.\n", 644 current->comm, *requested_mode); 645 *requested_mode &= ~AGPSTAT2_4X; 646 *requested_mode |= AGPSTAT3_4X; 647 } 648 } else { 649 /* 650 * The caller doesn't know what they are doing. We are in 3.0 mode, 651 * but have been passed an AGP 2.x mode. 652 * Convert AGP 1x,2x,4x -> AGP 3.0 4x. 653 */ 654 printk(KERN_INFO PFX "%s passes broken AGP2 flags (%x) in AGP3 mode. Fixed.\n", 655 current->comm, *requested_mode); 656 *requested_mode &= ~(AGPSTAT2_4X | AGPSTAT2_2X | AGPSTAT2_1X); 657 *requested_mode |= AGPSTAT3_4X; 658 } 659 660 if (*requested_mode & AGPSTAT3_8X) { 661 if (!(*bridge_agpstat & AGPSTAT3_8X)) { 662 *bridge_agpstat &= ~(AGPSTAT3_8X | AGPSTAT3_RSVD); 663 *bridge_agpstat |= AGPSTAT3_4X; 664 printk(KERN_INFO PFX "%s requested AGPx8 but bridge not capable.\n", current->comm); 665 return; 666 } 667 if (!(*vga_agpstat & AGPSTAT3_8X)) { 668 *bridge_agpstat &= ~(AGPSTAT3_8X | AGPSTAT3_RSVD); 669 *bridge_agpstat |= AGPSTAT3_4X; 670 printk(KERN_INFO PFX "%s requested AGPx8 but graphic card not capable.\n", current->comm); 671 return; 672 } 673 /* All set, bridge & device can do AGP x8*/ 674 *bridge_agpstat &= ~(AGPSTAT3_4X | AGPSTAT3_RSVD); 675 goto done; 676 677 } else if (*requested_mode & AGPSTAT3_4X) { 678 *bridge_agpstat &= ~(AGPSTAT3_8X | AGPSTAT3_RSVD); 679 *bridge_agpstat |= AGPSTAT3_4X; 680 goto done; 681 682 } else { 683 684 /* 685 * If we didn't specify an AGP mode, we see if both 686 * the graphics card, and the bridge can do x8, and use if so. 687 * If not, we fall back to x4 mode. 688 */ 689 if ((*bridge_agpstat & AGPSTAT3_8X) && (*vga_agpstat & AGPSTAT3_8X)) { 690 printk(KERN_INFO PFX "No AGP mode specified. Setting to highest mode " 691 "supported by bridge & card (x8).\n"); 692 *bridge_agpstat &= ~(AGPSTAT3_4X | AGPSTAT3_RSVD); 693 *vga_agpstat &= ~(AGPSTAT3_4X | AGPSTAT3_RSVD); 694 } else { 695 printk(KERN_INFO PFX "Fell back to AGPx4 mode because "); 696 if (!(*bridge_agpstat & AGPSTAT3_8X)) { 697 printk(KERN_INFO PFX "bridge couldn't do x8. bridge_agpstat:%x (orig=%x)\n", 698 *bridge_agpstat, origbridge); 699 *bridge_agpstat &= ~(AGPSTAT3_8X | AGPSTAT3_RSVD); 700 *bridge_agpstat |= AGPSTAT3_4X; 701 } 702 if (!(*vga_agpstat & AGPSTAT3_8X)) { 703 printk(KERN_INFO PFX "graphics card couldn't do x8. vga_agpstat:%x (orig=%x)\n", 704 *vga_agpstat, origvga); 705 *vga_agpstat &= ~(AGPSTAT3_8X | AGPSTAT3_RSVD); 706 *vga_agpstat |= AGPSTAT3_4X; 707 } 708 } 709 } 710 711done: 712 /* Apply any errata. */ 713 if (agp_bridge->flags & AGP_ERRATA_FASTWRITES) 714 *bridge_agpstat &= ~AGPSTAT_FW; 715 716 if (agp_bridge->flags & AGP_ERRATA_SBA) 717 *bridge_agpstat &= ~AGPSTAT_SBA; 718 719 if (agp_bridge->flags & AGP_ERRATA_1X) { 720 *bridge_agpstat &= ~(AGPSTAT2_2X | AGPSTAT2_4X); 721 *bridge_agpstat |= AGPSTAT2_1X; 722 } 723} 724 725 726/** 727 * agp_collect_device_status - determine correct agp_cmd from various agp_stat's 728 * @bridge: an agp_bridge_data struct allocated for the AGP host bridge. 729 * @requested_mode: requested agp_stat from userspace (Typically from X) 730 * @bridge_agpstat: current agp_stat from AGP bridge. 731 * 732 * This function will hunt for an AGP graphics card, and try to match 733 * the requested mode to the capabilities of both the bridge and the card. 734 */ 735u32 agp_collect_device_status(struct agp_bridge_data *bridge, u32 requested_mode, u32 bridge_agpstat) 736{ 737 struct pci_dev *device = NULL; 738 u32 vga_agpstat; 739 u8 cap_ptr; 740 741 for (;;) { 742 device = pci_get_class(PCI_CLASS_DISPLAY_VGA << 8, device); 743 if (!device) { 744 printk(KERN_INFO PFX "Couldn't find an AGP VGA controller.\n"); 745 return 0; 746 } 747 cap_ptr = pci_find_capability(device, PCI_CAP_ID_AGP); 748 if (cap_ptr) 749 break; 750 } 751 752 /* 753 * Ok, here we have a AGP device. Disable impossible 754 * settings, and adjust the readqueue to the minimum. 755 */ 756 pci_read_config_dword(device, cap_ptr+PCI_AGP_STATUS, &vga_agpstat); 757 758 /* adjust RQ depth */ 759 bridge_agpstat = ((bridge_agpstat & ~AGPSTAT_RQ_DEPTH) | 760 min_t(u32, (requested_mode & AGPSTAT_RQ_DEPTH), 761 min_t(u32, (bridge_agpstat & AGPSTAT_RQ_DEPTH), (vga_agpstat & AGPSTAT_RQ_DEPTH)))); 762 763 /* disable FW if it's not supported */ 764 if (!((bridge_agpstat & AGPSTAT_FW) && 765 (vga_agpstat & AGPSTAT_FW) && 766 (requested_mode & AGPSTAT_FW))) 767 bridge_agpstat &= ~AGPSTAT_FW; 768 769 /* Check to see if we are operating in 3.0 mode */ 770 if (agp_bridge->mode & AGPSTAT_MODE_3_0) 771 agp_v3_parse_one(&requested_mode, &bridge_agpstat, &vga_agpstat); 772 else 773 agp_v2_parse_one(&requested_mode, &bridge_agpstat, &vga_agpstat); 774 775 pci_dev_put(device); 776 return bridge_agpstat; 777} 778EXPORT_SYMBOL(agp_collect_device_status); 779 780 781void agp_device_command(u32 bridge_agpstat, bool agp_v3) 782{ 783 struct pci_dev *device = NULL; 784 int mode; 785 786 mode = bridge_agpstat & 0x7; 787 if (agp_v3) 788 mode *= 4; 789 790 for_each_pci_dev(device) { 791 u8 agp = pci_find_capability(device, PCI_CAP_ID_AGP); 792 if (!agp) 793 continue; 794 795 dev_info(&device->dev, "putting AGP V%d device into %dx mode\n", 796 agp_v3 ? 3 : 2, mode); 797 pci_write_config_dword(device, agp + PCI_AGP_COMMAND, bridge_agpstat); 798 } 799} 800EXPORT_SYMBOL(agp_device_command); 801 802 803void get_agp_version(struct agp_bridge_data *bridge) 804{ 805 u32 ncapid; 806 807 /* Exit early if already set by errata workarounds. */ 808 if (bridge->major_version != 0) 809 return; 810 811 pci_read_config_dword(bridge->dev, bridge->capndx, &ncapid); 812 bridge->major_version = (ncapid >> AGP_MAJOR_VERSION_SHIFT) & 0xf; 813 bridge->minor_version = (ncapid >> AGP_MINOR_VERSION_SHIFT) & 0xf; 814} 815EXPORT_SYMBOL(get_agp_version); 816 817 818void agp_generic_enable(struct agp_bridge_data *bridge, u32 requested_mode) 819{ 820 u32 bridge_agpstat, temp; 821 822 get_agp_version(agp_bridge); 823 824 dev_info(&agp_bridge->dev->dev, "AGP %d.%d bridge\n", 825 agp_bridge->major_version, agp_bridge->minor_version); 826 827 pci_read_config_dword(agp_bridge->dev, 828 agp_bridge->capndx + PCI_AGP_STATUS, &bridge_agpstat); 829 830 bridge_agpstat = agp_collect_device_status(agp_bridge, requested_mode, bridge_agpstat); 831 if (bridge_agpstat == 0) 832 /* Something bad happened. FIXME: Return error code? */ 833 return; 834 835 bridge_agpstat |= AGPSTAT_AGP_ENABLE; 836 837 /* Do AGP version specific frobbing. */ 838 if (bridge->major_version >= 3) { 839 if (bridge->mode & AGPSTAT_MODE_3_0) { 840 /* If we have 3.5, we can do the isoch stuff. */ 841 if (bridge->minor_version >= 5) 842 agp_3_5_enable(bridge); 843 agp_device_command(bridge_agpstat, true); 844 return; 845 } else { 846 /* Disable calibration cycle in RX91<1> when not in AGP3.0 mode of operation.*/ 847 bridge_agpstat &= ~(7<<10) ; 848 pci_read_config_dword(bridge->dev, 849 bridge->capndx+AGPCTRL, &temp); 850 temp |= (1<<9); 851 pci_write_config_dword(bridge->dev, 852 bridge->capndx+AGPCTRL, temp); 853 854 dev_info(&bridge->dev->dev, "bridge is in legacy mode, falling back to 2.x\n"); 855 } 856 } 857 858 /* AGP v<3 */ 859 agp_device_command(bridge_agpstat, false); 860} 861EXPORT_SYMBOL(agp_generic_enable); 862 863 864int agp_generic_create_gatt_table(struct agp_bridge_data *bridge) 865{ 866 char *table; 867 char *table_end; 868 int size; 869 int page_order; 870 int num_entries; 871 int i; 872 void *temp; 873 struct page *page; 874 875 /* The generic routines can't handle 2 level gatt's */ 876 if (bridge->driver->size_type == LVL2_APER_SIZE) 877 return -EINVAL; 878 879 table = NULL; 880 i = bridge->aperture_size_idx; 881 temp = bridge->current_size; 882 size = page_order = num_entries = 0; 883 884 if (bridge->driver->size_type != FIXED_APER_SIZE) { 885 do { 886 switch (bridge->driver->size_type) { 887 case U8_APER_SIZE: 888 size = A_SIZE_8(temp)->size; 889 page_order = 890 A_SIZE_8(temp)->page_order; 891 num_entries = 892 A_SIZE_8(temp)->num_entries; 893 break; 894 case U16_APER_SIZE: 895 size = A_SIZE_16(temp)->size; 896 page_order = A_SIZE_16(temp)->page_order; 897 num_entries = A_SIZE_16(temp)->num_entries; 898 break; 899 case U32_APER_SIZE: 900 size = A_SIZE_32(temp)->size; 901 page_order = A_SIZE_32(temp)->page_order; 902 num_entries = A_SIZE_32(temp)->num_entries; 903 break; 904 /* This case will never really happen. */ 905 case FIXED_APER_SIZE: 906 case LVL2_APER_SIZE: 907 default: 908 size = page_order = num_entries = 0; 909 break; 910 } 911 912 table = alloc_gatt_pages(page_order); 913 914 if (table == NULL) { 915 i++; 916 switch (bridge->driver->size_type) { 917 case U8_APER_SIZE: 918 bridge->current_size = A_IDX8(bridge); 919 break; 920 case U16_APER_SIZE: 921 bridge->current_size = A_IDX16(bridge); 922 break; 923 case U32_APER_SIZE: 924 bridge->current_size = A_IDX32(bridge); 925 break; 926 /* These cases will never really happen. */ 927 case FIXED_APER_SIZE: 928 case LVL2_APER_SIZE: 929 default: 930 break; 931 } 932 temp = bridge->current_size; 933 } else { 934 bridge->aperture_size_idx = i; 935 } 936 } while (!table && (i < bridge->driver->num_aperture_sizes)); 937 } else { 938 size = ((struct aper_size_info_fixed *) temp)->size; 939 page_order = ((struct aper_size_info_fixed *) temp)->page_order; 940 num_entries = ((struct aper_size_info_fixed *) temp)->num_entries; 941 table = alloc_gatt_pages(page_order); 942 } 943 944 if (table == NULL) 945 return -ENOMEM; 946 947 table_end = table + ((PAGE_SIZE * (1 << page_order)) - 1); 948 949 for (page = virt_to_page(table); page <= virt_to_page(table_end); page++) 950 SetPageReserved(page); 951 952 bridge->gatt_table_real = (u32 *) table; 953 agp_gatt_table = (void *)table; 954 955 bridge->driver->cache_flush(); 956#ifdef CONFIG_X86 957 if (set_memory_uc((unsigned long)table, 1 << page_order)) 958 printk(KERN_WARNING "Could not set GATT table memory to UC!\n"); 959 960 bridge->gatt_table = (u32 __iomem *)table; 961#else 962 bridge->gatt_table = ioremap_nocache(virt_to_phys(table), 963 (PAGE_SIZE * (1 << page_order))); 964 bridge->driver->cache_flush(); 965#endif 966 967 if (bridge->gatt_table == NULL) { 968 for (page = virt_to_page(table); page <= virt_to_page(table_end); page++) 969 ClearPageReserved(page); 970 971 free_gatt_pages(table, page_order); 972 973 return -ENOMEM; 974 } 975 bridge->gatt_bus_addr = virt_to_phys(bridge->gatt_table_real); 976 977 /* AK: bogus, should encode addresses > 4GB */ 978 for (i = 0; i < num_entries; i++) { 979 writel(bridge->scratch_page, bridge->gatt_table+i); 980 readl(bridge->gatt_table+i); /* PCI Posting. */ 981 } 982 983 return 0; 984} 985EXPORT_SYMBOL(agp_generic_create_gatt_table); 986 987int agp_generic_free_gatt_table(struct agp_bridge_data *bridge) 988{ 989 int page_order; 990 char *table, *table_end; 991 void *temp; 992 struct page *page; 993 994 temp = bridge->current_size; 995 996 switch (bridge->driver->size_type) { 997 case U8_APER_SIZE: 998 page_order = A_SIZE_8(temp)->page_order; 999 break; 1000 case U16_APER_SIZE: 1001 page_order = A_SIZE_16(temp)->page_order; 1002 break; 1003 case U32_APER_SIZE: 1004 page_order = A_SIZE_32(temp)->page_order; 1005 break; 1006 case FIXED_APER_SIZE: 1007 page_order = A_SIZE_FIX(temp)->page_order; 1008 break; 1009 case LVL2_APER_SIZE: 1010 /* The generic routines can't deal with 2 level gatt's */ 1011 return -EINVAL; 1012 default: 1013 page_order = 0; 1014 break; 1015 } 1016 1017 /* Do not worry about freeing memory, because if this is 1018 * called, then all agp memory is deallocated and removed 1019 * from the table. */ 1020 1021#ifdef CONFIG_X86 1022 set_memory_wb((unsigned long)bridge->gatt_table, 1 << page_order); 1023#else 1024 iounmap(bridge->gatt_table); 1025#endif 1026 table = (char *) bridge->gatt_table_real; 1027 table_end = table + ((PAGE_SIZE * (1 << page_order)) - 1); 1028 1029 for (page = virt_to_page(table); page <= virt_to_page(table_end); page++) 1030 ClearPageReserved(page); 1031 1032 free_gatt_pages(bridge->gatt_table_real, page_order); 1033 1034 agp_gatt_table = NULL; 1035 bridge->gatt_table = NULL; 1036 bridge->gatt_table_real = NULL; 1037 bridge->gatt_bus_addr = 0; 1038 1039 return 0; 1040} 1041EXPORT_SYMBOL(agp_generic_free_gatt_table); 1042 1043 1044int agp_generic_insert_memory(struct agp_memory * mem, off_t pg_start, int type) 1045{ 1046 int num_entries; 1047 size_t i; 1048 off_t j; 1049 void *temp; 1050 struct agp_bridge_data *bridge; 1051 int mask_type; 1052 1053 bridge = mem->bridge; 1054 if (!bridge) 1055 return -EINVAL; 1056 1057 if (mem->page_count == 0) 1058 return 0; 1059 1060 temp = bridge->current_size; 1061 1062 switch (bridge->driver->size_type) { 1063 case U8_APER_SIZE: 1064 num_entries = A_SIZE_8(temp)->num_entries; 1065 break; 1066 case U16_APER_SIZE: 1067 num_entries = A_SIZE_16(temp)->num_entries; 1068 break; 1069 case U32_APER_SIZE: 1070 num_entries = A_SIZE_32(temp)->num_entries; 1071 break; 1072 case FIXED_APER_SIZE: 1073 num_entries = A_SIZE_FIX(temp)->num_entries; 1074 break; 1075 case LVL2_APER_SIZE: 1076 /* The generic routines can't deal with 2 level gatt's */ 1077 return -EINVAL; 1078 default: 1079 num_entries = 0; 1080 break; 1081 } 1082 1083 num_entries -= agp_memory_reserved/PAGE_SIZE; 1084 if (num_entries < 0) num_entries = 0; 1085 1086 if (type != mem->type) 1087 return -EINVAL; 1088 1089 mask_type = bridge->driver->agp_type_to_mask_type(bridge, type); 1090 if (mask_type != 0) { 1091 /* The generic routines know nothing of memory types */ 1092 return -EINVAL; 1093 } 1094 1095 if (((pg_start + mem->page_count) > num_entries) || 1096 ((pg_start + mem->page_count) < pg_start)) 1097 return -EINVAL; 1098 1099 j = pg_start; 1100 1101 while (j < (pg_start + mem->page_count)) { 1102 if (!PGE_EMPTY(bridge, readl(bridge->gatt_table+j))) 1103 return -EBUSY; 1104 j++; 1105 } 1106 1107 if (!mem->is_flushed) { 1108 bridge->driver->cache_flush(); 1109 mem->is_flushed = true; 1110 } 1111 1112 for (i = 0, j = pg_start; i < mem->page_count; i++, j++) { 1113 writel(bridge->driver->mask_memory(bridge, 1114 page_to_phys(mem->pages[i]), 1115 mask_type), 1116 bridge->gatt_table+j); 1117 } 1118 readl(bridge->gatt_table+j-1); /* PCI Posting. */ 1119 1120 bridge->driver->tlb_flush(mem); 1121 return 0; 1122} 1123EXPORT_SYMBOL(agp_generic_insert_memory); 1124 1125 1126int agp_generic_remove_memory(struct agp_memory *mem, off_t pg_start, int type) 1127{ 1128 size_t i; 1129 struct agp_bridge_data *bridge; 1130 int mask_type, num_entries; 1131 1132 bridge = mem->bridge; 1133 if (!bridge) 1134 return -EINVAL; 1135 1136 if (mem->page_count == 0) 1137 return 0; 1138 1139 if (type != mem->type) 1140 return -EINVAL; 1141 1142 num_entries = agp_num_entries(); 1143 if (((pg_start + mem->page_count) > num_entries) || 1144 ((pg_start + mem->page_count) < pg_start)) 1145 return -EINVAL; 1146 1147 mask_type = bridge->driver->agp_type_to_mask_type(bridge, type); 1148 if (mask_type != 0) { 1149 /* The generic routines know nothing of memory types */ 1150 return -EINVAL; 1151 } 1152 1153 /* AK: bogus, should encode addresses > 4GB */ 1154 for (i = pg_start; i < (mem->page_count + pg_start); i++) { 1155 writel(bridge->scratch_page, bridge->gatt_table+i); 1156 } 1157 readl(bridge->gatt_table+i-1); /* PCI Posting. */ 1158 1159 bridge->driver->tlb_flush(mem); 1160 return 0; 1161} 1162EXPORT_SYMBOL(agp_generic_remove_memory); 1163 1164struct agp_memory *agp_generic_alloc_by_type(size_t page_count, int type) 1165{ 1166 return NULL; 1167} 1168EXPORT_SYMBOL(agp_generic_alloc_by_type); 1169 1170void agp_generic_free_by_type(struct agp_memory *curr) 1171{ 1172 agp_free_page_array(curr); 1173 agp_free_key(curr->key); 1174 kfree(curr); 1175} 1176EXPORT_SYMBOL(agp_generic_free_by_type); 1177 1178struct agp_memory *agp_generic_alloc_user(size_t page_count, int type) 1179{ 1180 struct agp_memory *new; 1181 int i; 1182 int pages; 1183 1184 pages = (page_count + ENTRIES_PER_PAGE - 1) / ENTRIES_PER_PAGE; 1185 new = agp_create_user_memory(page_count); 1186 if (new == NULL) 1187 return NULL; 1188 1189 for (i = 0; i < page_count; i++) 1190 new->pages[i] = NULL; 1191 new->page_count = 0; 1192 new->type = type; 1193 new->num_scratch_pages = pages; 1194 1195 return new; 1196} 1197EXPORT_SYMBOL(agp_generic_alloc_user); 1198 1199/* 1200 * Basic Page Allocation Routines - 1201 * These routines handle page allocation and by default they reserve the allocated 1202 * memory. They also handle incrementing the current_memory_agp value, Which is checked 1203 * against a maximum value. 1204 */ 1205 1206int agp_generic_alloc_pages(struct agp_bridge_data *bridge, struct agp_memory *mem, size_t num_pages) 1207{ 1208 struct page * page; 1209 int i, ret = -ENOMEM; 1210 1211 for (i = 0; i < num_pages; i++) { 1212 page = alloc_page(GFP_KERNEL | GFP_DMA32 | __GFP_ZERO); 1213 /* agp_free_memory() needs gart address */ 1214 if (page == NULL) 1215 goto out; 1216 1217#ifndef CONFIG_X86 1218 map_page_into_agp(page); 1219#endif 1220 get_page(page); 1221 atomic_inc(&agp_bridge->current_memory_agp); 1222 1223 mem->pages[i] = page; 1224 mem->page_count++; 1225 } 1226 1227#ifdef CONFIG_X86 1228 set_pages_array_uc(mem->pages, num_pages); 1229#endif 1230 ret = 0; 1231out: 1232 return ret; 1233} 1234EXPORT_SYMBOL(agp_generic_alloc_pages); 1235 1236struct page *agp_generic_alloc_page(struct agp_bridge_data *bridge) 1237{ 1238 struct page * page; 1239 1240 page = alloc_page(GFP_KERNEL | GFP_DMA32 | __GFP_ZERO); 1241 if (page == NULL) 1242 return NULL; 1243 1244 map_page_into_agp(page); 1245 1246 get_page(page); 1247 atomic_inc(&agp_bridge->current_memory_agp); 1248 return page; 1249} 1250EXPORT_SYMBOL(agp_generic_alloc_page); 1251 1252void agp_generic_destroy_pages(struct agp_memory *mem) 1253{ 1254 int i; 1255 struct page *page; 1256 1257 if (!mem) 1258 return; 1259 1260#ifdef CONFIG_X86 1261 set_pages_array_wb(mem->pages, mem->page_count); 1262#endif 1263 1264 for (i = 0; i < mem->page_count; i++) { 1265 page = mem->pages[i]; 1266 1267#ifndef CONFIG_X86 1268 unmap_page_from_agp(page); 1269#endif 1270 put_page(page); 1271 __free_page(page); 1272 atomic_dec(&agp_bridge->current_memory_agp); 1273 mem->pages[i] = NULL; 1274 } 1275} 1276EXPORT_SYMBOL(agp_generic_destroy_pages); 1277 1278void agp_generic_destroy_page(struct page *page, int flags) 1279{ 1280 if (page == NULL) 1281 return; 1282 1283 if (flags & AGP_PAGE_DESTROY_UNMAP) 1284 unmap_page_from_agp(page); 1285 1286 if (flags & AGP_PAGE_DESTROY_FREE) { 1287 put_page(page); 1288 __free_page(page); 1289 atomic_dec(&agp_bridge->current_memory_agp); 1290 } 1291} 1292EXPORT_SYMBOL(agp_generic_destroy_page); 1293 1294/* End Basic Page Allocation Routines */ 1295 1296 1297/** 1298 * agp_enable - initialise the agp point-to-point connection. 1299 * 1300 * @mode: agp mode register value to configure with. 1301 */ 1302void agp_enable(struct agp_bridge_data *bridge, u32 mode) 1303{ 1304 if (!bridge) 1305 return; 1306 bridge->driver->agp_enable(bridge, mode); 1307} 1308EXPORT_SYMBOL(agp_enable); 1309 1310/* When we remove the global variable agp_bridge from all drivers 1311 * then agp_alloc_bridge and agp_generic_find_bridge need to be updated 1312 */ 1313 1314struct agp_bridge_data *agp_generic_find_bridge(struct pci_dev *pdev) 1315{ 1316 if (list_empty(&agp_bridges)) 1317 return NULL; 1318 1319 return agp_bridge; 1320} 1321 1322static void ipi_handler(void *null) 1323{ 1324 flush_agp_cache(); 1325} 1326 1327void global_cache_flush(void) 1328{ 1329 if (on_each_cpu(ipi_handler, NULL, 1) != 0) 1330 panic(PFX "timed out waiting for the other CPUs!\n"); 1331} 1332EXPORT_SYMBOL(global_cache_flush); 1333 1334unsigned long agp_generic_mask_memory(struct agp_bridge_data *bridge, 1335 dma_addr_t addr, int type) 1336{ 1337 /* memory type is ignored in the generic routine */ 1338 if (bridge->driver->masks) 1339 return addr | bridge->driver->masks[0].mask; 1340 else 1341 return addr; 1342} 1343EXPORT_SYMBOL(agp_generic_mask_memory); 1344 1345int agp_generic_type_to_mask_type(struct agp_bridge_data *bridge, 1346 int type) 1347{ 1348 if (type >= AGP_USER_TYPES) 1349 return 0; 1350 return type; 1351} 1352EXPORT_SYMBOL(agp_generic_type_to_mask_type); 1353 1354/* 1355 * These functions are implemented according to the AGPv3 spec, 1356 * which covers implementation details that had previously been 1357 * left open. 1358 */ 1359 1360int agp3_generic_fetch_size(void) 1361{ 1362 u16 temp_size; 1363 int i; 1364 struct aper_size_info_16 *values; 1365 1366 pci_read_config_word(agp_bridge->dev, agp_bridge->capndx+AGPAPSIZE, &temp_size); 1367 values = A_SIZE_16(agp_bridge->driver->aperture_sizes); 1368 1369 for (i = 0; i < agp_bridge->driver->num_aperture_sizes; i++) { 1370 if (temp_size == values[i].size_value) { 1371 agp_bridge->previous_size = 1372 agp_bridge->current_size = (void *) (values + i); 1373 1374 agp_bridge->aperture_size_idx = i; 1375 return values[i].size; 1376 } 1377 } 1378 return 0; 1379} 1380EXPORT_SYMBOL(agp3_generic_fetch_size); 1381 1382void agp3_generic_tlbflush(struct agp_memory *mem) 1383{ 1384 u32 ctrl; 1385 pci_read_config_dword(agp_bridge->dev, agp_bridge->capndx+AGPCTRL, &ctrl); 1386 pci_write_config_dword(agp_bridge->dev, agp_bridge->capndx+AGPCTRL, ctrl & ~AGPCTRL_GTLBEN); 1387 pci_write_config_dword(agp_bridge->dev, agp_bridge->capndx+AGPCTRL, ctrl); 1388} 1389EXPORT_SYMBOL(agp3_generic_tlbflush); 1390 1391int agp3_generic_configure(void) 1392{ 1393 u32 temp; 1394 struct aper_size_info_16 *current_size; 1395 1396 current_size = A_SIZE_16(agp_bridge->current_size); 1397 1398 agp_bridge->gart_bus_addr = pci_bus_address(agp_bridge->dev, 1399 AGP_APERTURE_BAR); 1400 1401 /* set aperture size */ 1402 pci_write_config_word(agp_bridge->dev, agp_bridge->capndx+AGPAPSIZE, current_size->size_value); 1403 /* set gart pointer */ 1404 pci_write_config_dword(agp_bridge->dev, agp_bridge->capndx+AGPGARTLO, agp_bridge->gatt_bus_addr); 1405 /* enable aperture and GTLB */ 1406 pci_read_config_dword(agp_bridge->dev, agp_bridge->capndx+AGPCTRL, &temp); 1407 pci_write_config_dword(agp_bridge->dev, agp_bridge->capndx+AGPCTRL, temp | AGPCTRL_APERENB | AGPCTRL_GTLBEN); 1408 return 0; 1409} 1410EXPORT_SYMBOL(agp3_generic_configure); 1411 1412void agp3_generic_cleanup(void) 1413{ 1414 u32 ctrl; 1415 pci_read_config_dword(agp_bridge->dev, agp_bridge->capndx+AGPCTRL, &ctrl); 1416 pci_write_config_dword(agp_bridge->dev, agp_bridge->capndx+AGPCTRL, ctrl & ~AGPCTRL_APERENB); 1417} 1418EXPORT_SYMBOL(agp3_generic_cleanup); 1419 1420const struct aper_size_info_16 agp3_generic_sizes[AGP_GENERIC_SIZES_ENTRIES] = 1421{ 1422 {4096, 1048576, 10,0x000}, 1423 {2048, 524288, 9, 0x800}, 1424 {1024, 262144, 8, 0xc00}, 1425 { 512, 131072, 7, 0xe00}, 1426 { 256, 65536, 6, 0xf00}, 1427 { 128, 32768, 5, 0xf20}, 1428 { 64, 16384, 4, 0xf30}, 1429 { 32, 8192, 3, 0xf38}, 1430 { 16, 4096, 2, 0xf3c}, 1431 { 8, 2048, 1, 0xf3e}, 1432 { 4, 1024, 0, 0xf3f} 1433}; 1434EXPORT_SYMBOL(agp3_generic_sizes); 1435 1436