Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 30 | #include <linux/module.h> |
| 31 | #include <linux/pci.h> |
| 32 | #include <linux/init.h> |
| 33 | #include <linux/pagemap.h> |
| 34 | #include <linux/miscdevice.h> |
| 35 | #include <linux/pm.h> |
| 36 | #include <linux/agp_backend.h> |
| 37 | #include <linux/vmalloc.h> |
| 38 | #include <linux/dma-mapping.h> |
| 39 | #include <linux/mm.h> |
| 40 | #include <asm/io.h> |
| 41 | #include <asm/cacheflush.h> |
| 42 | #include <asm/pgtable.h> |
| 43 | #include "agp.h" |
| 44 | |
| 45 | __u32 *agp_gatt_table; |
| 46 | int agp_memory_reserved; |
| 47 | |
| 48 | /* |
| 49 | * Needed by the Nforce GART driver for the time being. Would be |
| 50 | * nice to do this some other way instead of needing this export. |
| 51 | */ |
| 52 | EXPORT_SYMBOL_GPL(agp_memory_reserved); |
| 53 | |
| 54 | #if defined(CONFIG_X86) |
| 55 | int map_page_into_agp(struct page *page) |
| 56 | { |
| 57 | int i; |
| 58 | i = change_page_attr(page, 1, PAGE_KERNEL_NOCACHE); |
Alan Hourihane | 88d5196 | 2005-11-06 23:35:34 -0800 | [diff] [blame] | 59 | /* Caller's responsibility to call global_flush_tlb() for |
| 60 | * performance reasons */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 61 | return i; |
| 62 | } |
| 63 | EXPORT_SYMBOL_GPL(map_page_into_agp); |
| 64 | |
| 65 | int unmap_page_from_agp(struct page *page) |
| 66 | { |
| 67 | int i; |
| 68 | i = change_page_attr(page, 1, PAGE_KERNEL); |
Alan Hourihane | 88d5196 | 2005-11-06 23:35:34 -0800 | [diff] [blame] | 69 | /* Caller's responsibility to call global_flush_tlb() for |
| 70 | * performance reasons */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 71 | return i; |
| 72 | } |
| 73 | EXPORT_SYMBOL_GPL(unmap_page_from_agp); |
| 74 | #endif |
| 75 | |
| 76 | /* |
| 77 | * Generic routines for handling agp_memory structures - |
| 78 | * They use the basic page allocation routines to do the brunt of the work. |
| 79 | */ |
| 80 | |
| 81 | void agp_free_key(int key) |
| 82 | { |
| 83 | if (key < 0) |
| 84 | return; |
| 85 | |
| 86 | if (key < MAXKEY) |
| 87 | clear_bit(key, agp_bridge->key_list); |
| 88 | } |
| 89 | EXPORT_SYMBOL(agp_free_key); |
| 90 | |
| 91 | |
| 92 | static int agp_get_key(void) |
| 93 | { |
| 94 | int bit; |
| 95 | |
| 96 | bit = find_first_zero_bit(agp_bridge->key_list, MAXKEY); |
| 97 | if (bit < MAXKEY) { |
| 98 | set_bit(bit, agp_bridge->key_list); |
| 99 | return bit; |
| 100 | } |
| 101 | return -1; |
| 102 | } |
| 103 | |
Thomas Hellstrom | a030ce4 | 2007-01-23 10:33:43 +0100 | [diff] [blame] | 104 | /* |
| 105 | * Use kmalloc if possible for the page list. Otherwise fall back to |
| 106 | * vmalloc. This speeds things up and also saves memory for small AGP |
| 107 | * regions. |
| 108 | */ |
| 109 | |
| 110 | void agp_alloc_page_array(size_t size, struct agp_memory *mem) |
| 111 | { |
| 112 | mem->memory = NULL; |
| 113 | mem->vmalloc_flag = 0; |
| 114 | |
Andrew Morton | 1c14cfb | 2007-02-05 16:09:35 -0800 | [diff] [blame^] | 115 | if (size <= 2*PAGE_SIZE) |
Thomas Hellstrom | a030ce4 | 2007-01-23 10:33:43 +0100 | [diff] [blame] | 116 | mem->memory = kmalloc(size, GFP_KERNEL | __GFP_NORETRY); |
Thomas Hellstrom | a030ce4 | 2007-01-23 10:33:43 +0100 | [diff] [blame] | 117 | if (mem->memory == NULL) { |
| 118 | mem->memory = vmalloc(size); |
| 119 | mem->vmalloc_flag = 1; |
| 120 | } |
| 121 | } |
| 122 | EXPORT_SYMBOL(agp_alloc_page_array); |
| 123 | |
| 124 | void agp_free_page_array(struct agp_memory *mem) |
| 125 | { |
| 126 | if (mem->vmalloc_flag) { |
| 127 | vfree(mem->memory); |
| 128 | } else { |
| 129 | kfree(mem->memory); |
| 130 | } |
| 131 | } |
| 132 | EXPORT_SYMBOL(agp_free_page_array); |
| 133 | |
| 134 | |
| 135 | static struct agp_memory *agp_create_user_memory(unsigned long num_agp_pages) |
| 136 | { |
| 137 | struct agp_memory *new; |
| 138 | unsigned long alloc_size = num_agp_pages*sizeof(struct page *); |
| 139 | |
Andrew Morton | 1c14cfb | 2007-02-05 16:09:35 -0800 | [diff] [blame^] | 140 | new = kzalloc(sizeof(struct agp_memory), GFP_KERNEL); |
Thomas Hellstrom | a030ce4 | 2007-01-23 10:33:43 +0100 | [diff] [blame] | 141 | if (new == NULL) |
| 142 | return NULL; |
| 143 | |
Thomas Hellstrom | a030ce4 | 2007-01-23 10:33:43 +0100 | [diff] [blame] | 144 | new->key = agp_get_key(); |
| 145 | |
| 146 | if (new->key < 0) { |
| 147 | kfree(new); |
| 148 | return NULL; |
| 149 | } |
| 150 | |
| 151 | agp_alloc_page_array(alloc_size, new); |
| 152 | |
| 153 | if (new->memory == NULL) { |
| 154 | agp_free_key(new->key); |
| 155 | kfree(new); |
| 156 | return NULL; |
| 157 | } |
| 158 | new->num_scratch_pages = 0; |
| 159 | return new; |
| 160 | } |
| 161 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 162 | struct agp_memory *agp_create_memory(int scratch_pages) |
| 163 | { |
| 164 | struct agp_memory *new; |
| 165 | |
Dave Jones | 0ea27d9 | 2005-10-20 15:12:16 -0700 | [diff] [blame] | 166 | new = kzalloc(sizeof(struct agp_memory), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 167 | if (new == NULL) |
| 168 | return NULL; |
| 169 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 170 | new->key = agp_get_key(); |
| 171 | |
| 172 | if (new->key < 0) { |
| 173 | kfree(new); |
| 174 | return NULL; |
| 175 | } |
Thomas Hellstrom | a030ce4 | 2007-01-23 10:33:43 +0100 | [diff] [blame] | 176 | |
| 177 | agp_alloc_page_array(PAGE_SIZE * scratch_pages, new); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 178 | |
| 179 | if (new->memory == NULL) { |
| 180 | agp_free_key(new->key); |
| 181 | kfree(new); |
| 182 | return NULL; |
| 183 | } |
| 184 | new->num_scratch_pages = scratch_pages; |
Thomas Hellstrom | a030ce4 | 2007-01-23 10:33:43 +0100 | [diff] [blame] | 185 | new->type = AGP_NORMAL_MEMORY; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 186 | return new; |
| 187 | } |
| 188 | EXPORT_SYMBOL(agp_create_memory); |
| 189 | |
| 190 | /** |
| 191 | * agp_free_memory - free memory associated with an agp_memory pointer. |
| 192 | * |
| 193 | * @curr: agp_memory pointer to be freed. |
| 194 | * |
| 195 | * It is the only function that can be called when the backend is not owned |
| 196 | * by the caller. (So it can free memory on client death.) |
| 197 | */ |
| 198 | void agp_free_memory(struct agp_memory *curr) |
| 199 | { |
| 200 | size_t i; |
| 201 | |
| 202 | if (curr == NULL) |
| 203 | return; |
| 204 | |
| 205 | if (curr->is_bound == TRUE) |
| 206 | agp_unbind_memory(curr); |
| 207 | |
Thomas Hellstrom | a030ce4 | 2007-01-23 10:33:43 +0100 | [diff] [blame] | 208 | if (curr->type >= AGP_USER_TYPES) { |
| 209 | agp_generic_free_by_type(curr); |
| 210 | return; |
| 211 | } |
| 212 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 213 | if (curr->type != 0) { |
| 214 | curr->bridge->driver->free_by_type(curr); |
| 215 | return; |
| 216 | } |
| 217 | if (curr->page_count != 0) { |
| 218 | for (i = 0; i < curr->page_count; i++) { |
Keir Fraser | 07eee78 | 2005-03-30 13:17:04 -0800 | [diff] [blame] | 219 | curr->bridge->driver->agp_destroy_page(gart_to_virt(curr->memory[i])); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 220 | } |
Linus Torvalds | 6730c3c | 2005-11-09 14:56:00 -0800 | [diff] [blame] | 221 | flush_agp_mappings(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 222 | } |
| 223 | agp_free_key(curr->key); |
Thomas Hellstrom | a030ce4 | 2007-01-23 10:33:43 +0100 | [diff] [blame] | 224 | agp_free_page_array(curr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 225 | kfree(curr); |
| 226 | } |
| 227 | EXPORT_SYMBOL(agp_free_memory); |
| 228 | |
| 229 | #define ENTRIES_PER_PAGE (PAGE_SIZE / sizeof(unsigned long)) |
| 230 | |
| 231 | /** |
| 232 | * agp_allocate_memory - allocate a group of pages of a certain type. |
| 233 | * |
| 234 | * @page_count: size_t argument of the number of pages |
| 235 | * @type: u32 argument of the type of memory to be allocated. |
| 236 | * |
| 237 | * Every agp bridge device will allow you to allocate AGP_NORMAL_MEMORY which |
| 238 | * maps to physical ram. Any other type is device dependent. |
| 239 | * |
| 240 | * It returns NULL whenever memory is unavailable. |
| 241 | */ |
| 242 | struct agp_memory *agp_allocate_memory(struct agp_bridge_data *bridge, |
| 243 | size_t page_count, u32 type) |
| 244 | { |
| 245 | int scratch_pages; |
| 246 | struct agp_memory *new; |
| 247 | size_t i; |
| 248 | |
| 249 | if (!bridge) |
| 250 | return NULL; |
| 251 | |
| 252 | if ((atomic_read(&bridge->current_memory_agp) + page_count) > bridge->max_memory_agp) |
| 253 | return NULL; |
| 254 | |
Thomas Hellstrom | a030ce4 | 2007-01-23 10:33:43 +0100 | [diff] [blame] | 255 | if (type >= AGP_USER_TYPES) { |
| 256 | new = agp_generic_alloc_user(page_count, type); |
| 257 | if (new) |
| 258 | new->bridge = bridge; |
| 259 | return new; |
| 260 | } |
| 261 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 262 | if (type != 0) { |
| 263 | new = bridge->driver->alloc_by_type(page_count, type); |
| 264 | if (new) |
| 265 | new->bridge = bridge; |
| 266 | return new; |
| 267 | } |
| 268 | |
| 269 | scratch_pages = (page_count + ENTRIES_PER_PAGE - 1) / ENTRIES_PER_PAGE; |
| 270 | |
| 271 | new = agp_create_memory(scratch_pages); |
| 272 | |
| 273 | if (new == NULL) |
| 274 | return NULL; |
| 275 | |
| 276 | for (i = 0; i < page_count; i++) { |
| 277 | void *addr = bridge->driver->agp_alloc_page(bridge); |
| 278 | |
| 279 | if (addr == NULL) { |
| 280 | agp_free_memory(new); |
| 281 | return NULL; |
| 282 | } |
Keir Fraser | 07eee78 | 2005-03-30 13:17:04 -0800 | [diff] [blame] | 283 | new->memory[i] = virt_to_gart(addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 284 | new->page_count++; |
| 285 | } |
Alan Hourihane | 88d5196 | 2005-11-06 23:35:34 -0800 | [diff] [blame] | 286 | new->bridge = bridge; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 287 | |
| 288 | flush_agp_mappings(); |
| 289 | |
| 290 | return new; |
| 291 | } |
| 292 | EXPORT_SYMBOL(agp_allocate_memory); |
| 293 | |
| 294 | |
| 295 | /* End - Generic routines for handling agp_memory structures */ |
| 296 | |
| 297 | |
| 298 | static int agp_return_size(void) |
| 299 | { |
| 300 | int current_size; |
| 301 | void *temp; |
| 302 | |
| 303 | temp = agp_bridge->current_size; |
| 304 | |
| 305 | switch (agp_bridge->driver->size_type) { |
| 306 | case U8_APER_SIZE: |
| 307 | current_size = A_SIZE_8(temp)->size; |
| 308 | break; |
| 309 | case U16_APER_SIZE: |
| 310 | current_size = A_SIZE_16(temp)->size; |
| 311 | break; |
| 312 | case U32_APER_SIZE: |
| 313 | current_size = A_SIZE_32(temp)->size; |
| 314 | break; |
| 315 | case LVL2_APER_SIZE: |
| 316 | current_size = A_SIZE_LVL2(temp)->size; |
| 317 | break; |
| 318 | case FIXED_APER_SIZE: |
| 319 | current_size = A_SIZE_FIX(temp)->size; |
| 320 | break; |
| 321 | default: |
| 322 | current_size = 0; |
| 323 | break; |
| 324 | } |
| 325 | |
| 326 | current_size -= (agp_memory_reserved / (1024*1024)); |
| 327 | if (current_size <0) |
| 328 | current_size = 0; |
| 329 | return current_size; |
| 330 | } |
| 331 | |
| 332 | |
| 333 | int agp_num_entries(void) |
| 334 | { |
| 335 | int num_entries; |
| 336 | void *temp; |
| 337 | |
| 338 | temp = agp_bridge->current_size; |
| 339 | |
| 340 | switch (agp_bridge->driver->size_type) { |
| 341 | case U8_APER_SIZE: |
| 342 | num_entries = A_SIZE_8(temp)->num_entries; |
| 343 | break; |
| 344 | case U16_APER_SIZE: |
| 345 | num_entries = A_SIZE_16(temp)->num_entries; |
| 346 | break; |
| 347 | case U32_APER_SIZE: |
| 348 | num_entries = A_SIZE_32(temp)->num_entries; |
| 349 | break; |
| 350 | case LVL2_APER_SIZE: |
| 351 | num_entries = A_SIZE_LVL2(temp)->num_entries; |
| 352 | break; |
| 353 | case FIXED_APER_SIZE: |
| 354 | num_entries = A_SIZE_FIX(temp)->num_entries; |
| 355 | break; |
| 356 | default: |
| 357 | num_entries = 0; |
| 358 | break; |
| 359 | } |
| 360 | |
| 361 | num_entries -= agp_memory_reserved>>PAGE_SHIFT; |
| 362 | if (num_entries<0) |
| 363 | num_entries = 0; |
| 364 | return num_entries; |
| 365 | } |
| 366 | EXPORT_SYMBOL_GPL(agp_num_entries); |
| 367 | |
| 368 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 369 | /** |
| 370 | * agp_copy_info - copy bridge state information |
| 371 | * |
Dave Jones | 6a92a4e | 2006-02-28 00:54:25 -0500 | [diff] [blame] | 372 | * @info: agp_kern_info pointer. The caller should insure that this pointer is valid. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 373 | * |
| 374 | * This function copies information about the agp bridge device and the state of |
| 375 | * the agp backend into an agp_kern_info pointer. |
| 376 | */ |
| 377 | int agp_copy_info(struct agp_bridge_data *bridge, struct agp_kern_info *info) |
| 378 | { |
| 379 | memset(info, 0, sizeof(struct agp_kern_info)); |
| 380 | if (!bridge) { |
| 381 | info->chipset = NOT_SUPPORTED; |
| 382 | return -EIO; |
| 383 | } |
| 384 | |
| 385 | info->version.major = bridge->version->major; |
| 386 | info->version.minor = bridge->version->minor; |
| 387 | info->chipset = SUPPORTED; |
| 388 | info->device = bridge->dev; |
David Mosberger | 66bb8bf | 2005-04-04 13:29:43 -0700 | [diff] [blame] | 389 | if (bridge->mode & AGPSTAT_MODE_3_0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 390 | info->mode = bridge->mode & ~AGP3_RESERVED_MASK; |
| 391 | else |
| 392 | info->mode = bridge->mode & ~AGP2_RESERVED_MASK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 393 | info->aper_base = bridge->gart_bus_addr; |
| 394 | info->aper_size = agp_return_size(); |
| 395 | info->max_memory = bridge->max_memory_agp; |
| 396 | info->current_memory = atomic_read(&bridge->current_memory_agp); |
| 397 | info->cant_use_aperture = bridge->driver->cant_use_aperture; |
| 398 | info->vm_ops = bridge->vm_ops; |
| 399 | info->page_mask = ~0UL; |
| 400 | return 0; |
| 401 | } |
| 402 | EXPORT_SYMBOL(agp_copy_info); |
| 403 | |
| 404 | /* End - Routine to copy over information structure */ |
| 405 | |
| 406 | /* |
| 407 | * Routines for handling swapping of agp_memory into the GATT - |
| 408 | * These routines take agp_memory and insert them into the GATT. |
| 409 | * They call device specific routines to actually write to the GATT. |
| 410 | */ |
| 411 | |
| 412 | /** |
| 413 | * agp_bind_memory - Bind an agp_memory structure into the GATT. |
| 414 | * |
| 415 | * @curr: agp_memory pointer |
| 416 | * @pg_start: an offset into the graphics aperture translation table |
| 417 | * |
| 418 | * It returns -EINVAL if the pointer == NULL. |
| 419 | * It returns -EBUSY if the area of the table requested is already in use. |
| 420 | */ |
| 421 | int agp_bind_memory(struct agp_memory *curr, off_t pg_start) |
| 422 | { |
| 423 | int ret_val; |
| 424 | |
| 425 | if (curr == NULL) |
| 426 | return -EINVAL; |
| 427 | |
| 428 | if (curr->is_bound == TRUE) { |
Dave Jones | 8c8b838 | 2005-08-17 23:08:11 -0700 | [diff] [blame] | 429 | printk(KERN_INFO PFX "memory %p is already bound!\n", curr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 430 | return -EINVAL; |
| 431 | } |
| 432 | if (curr->is_flushed == FALSE) { |
| 433 | curr->bridge->driver->cache_flush(); |
| 434 | curr->is_flushed = TRUE; |
| 435 | } |
| 436 | ret_val = curr->bridge->driver->insert_memory(curr, pg_start, curr->type); |
| 437 | |
| 438 | if (ret_val != 0) |
| 439 | return ret_val; |
| 440 | |
| 441 | curr->is_bound = TRUE; |
| 442 | curr->pg_start = pg_start; |
| 443 | return 0; |
| 444 | } |
| 445 | EXPORT_SYMBOL(agp_bind_memory); |
| 446 | |
| 447 | |
| 448 | /** |
| 449 | * agp_unbind_memory - Removes an agp_memory structure from the GATT |
| 450 | * |
| 451 | * @curr: agp_memory pointer to be removed from the GATT. |
| 452 | * |
| 453 | * It returns -EINVAL if this piece of agp_memory is not currently bound to |
| 454 | * the graphics aperture translation table or if the agp_memory pointer == NULL |
| 455 | */ |
| 456 | int agp_unbind_memory(struct agp_memory *curr) |
| 457 | { |
| 458 | int ret_val; |
| 459 | |
| 460 | if (curr == NULL) |
| 461 | return -EINVAL; |
| 462 | |
| 463 | if (curr->is_bound != TRUE) { |
Dave Jones | 8c8b838 | 2005-08-17 23:08:11 -0700 | [diff] [blame] | 464 | printk(KERN_INFO PFX "memory %p was not bound!\n", curr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 465 | return -EINVAL; |
| 466 | } |
| 467 | |
| 468 | ret_val = curr->bridge->driver->remove_memory(curr, curr->pg_start, curr->type); |
| 469 | |
| 470 | if (ret_val != 0) |
| 471 | return ret_val; |
| 472 | |
| 473 | curr->is_bound = FALSE; |
| 474 | curr->pg_start = 0; |
| 475 | return 0; |
| 476 | } |
| 477 | EXPORT_SYMBOL(agp_unbind_memory); |
| 478 | |
| 479 | /* End - Routines for handling swapping of agp_memory into the GATT */ |
| 480 | |
| 481 | |
| 482 | /* Generic Agp routines - Start */ |
| 483 | static void agp_v2_parse_one(u32 *requested_mode, u32 *bridge_agpstat, u32 *vga_agpstat) |
| 484 | { |
| 485 | u32 tmp; |
| 486 | |
| 487 | if (*requested_mode & AGP2_RESERVED_MASK) { |
Dave Jones | c4dd458 | 2005-11-04 15:18:56 -0800 | [diff] [blame] | 488 | printk(KERN_INFO PFX "reserved bits set (%x) in mode 0x%x. Fixed.\n", |
| 489 | *requested_mode & AGP2_RESERVED_MASK, *requested_mode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 490 | *requested_mode &= ~AGP2_RESERVED_MASK; |
| 491 | } |
| 492 | |
Dave Jones | 28af24b | 2006-11-03 15:13:27 -0500 | [diff] [blame] | 493 | /* |
| 494 | * Some dumb bridges are programmed to disobey the AGP2 spec. |
| 495 | * This is likely a BIOS misprogramming rather than poweron default, or |
| 496 | * it would be a lot more common. |
| 497 | * https://bugs.freedesktop.org/show_bug.cgi?id=8816 |
| 498 | * AGPv2 spec 6.1.9 states: |
| 499 | * The RATE field indicates the data transfer rates supported by this |
| 500 | * device. A.G.P. devices must report all that apply. |
| 501 | * Fix them up as best we can. |
| 502 | */ |
| 503 | switch (*bridge_agpstat & 7) { |
| 504 | case 4: |
| 505 | *bridge_agpstat |= (AGPSTAT2_2X | AGPSTAT2_1X); |
| 506 | printk(KERN_INFO PFX "BIOS bug. AGP bridge claims to only support x4 rate" |
| 507 | "Fixing up support for x2 & x1\n"); |
| 508 | break; |
| 509 | case 2: |
| 510 | *bridge_agpstat |= AGPSTAT2_1X; |
| 511 | printk(KERN_INFO PFX "BIOS bug. AGP bridge claims to only support x2 rate" |
| 512 | "Fixing up support for x1\n"); |
| 513 | break; |
| 514 | default: |
| 515 | break; |
| 516 | } |
| 517 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 518 | /* Check the speed bits make sense. Only one should be set. */ |
| 519 | tmp = *requested_mode & 7; |
| 520 | switch (tmp) { |
| 521 | case 0: |
Dave Jones | 8c8b838 | 2005-08-17 23:08:11 -0700 | [diff] [blame] | 522 | printk(KERN_INFO PFX "%s tried to set rate=x0. Setting to x1 mode.\n", current->comm); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 523 | *requested_mode |= AGPSTAT2_1X; |
| 524 | break; |
| 525 | case 1: |
| 526 | case 2: |
| 527 | break; |
| 528 | case 3: |
| 529 | *requested_mode &= ~(AGPSTAT2_1X); /* rate=2 */ |
| 530 | break; |
| 531 | case 4: |
| 532 | break; |
| 533 | case 5: |
| 534 | case 6: |
| 535 | case 7: |
| 536 | *requested_mode &= ~(AGPSTAT2_1X|AGPSTAT2_2X); /* rate=4*/ |
| 537 | break; |
| 538 | } |
| 539 | |
| 540 | /* disable SBA if it's not supported */ |
| 541 | if (!((*bridge_agpstat & AGPSTAT_SBA) && (*vga_agpstat & AGPSTAT_SBA) && (*requested_mode & AGPSTAT_SBA))) |
| 542 | *bridge_agpstat &= ~AGPSTAT_SBA; |
| 543 | |
| 544 | /* Set rate */ |
| 545 | if (!((*bridge_agpstat & AGPSTAT2_4X) && (*vga_agpstat & AGPSTAT2_4X) && (*requested_mode & AGPSTAT2_4X))) |
| 546 | *bridge_agpstat &= ~AGPSTAT2_4X; |
| 547 | |
| 548 | if (!((*bridge_agpstat & AGPSTAT2_2X) && (*vga_agpstat & AGPSTAT2_2X) && (*requested_mode & AGPSTAT2_2X))) |
| 549 | *bridge_agpstat &= ~AGPSTAT2_2X; |
| 550 | |
| 551 | if (!((*bridge_agpstat & AGPSTAT2_1X) && (*vga_agpstat & AGPSTAT2_1X) && (*requested_mode & AGPSTAT2_1X))) |
| 552 | *bridge_agpstat &= ~AGPSTAT2_1X; |
| 553 | |
| 554 | /* Now we know what mode it should be, clear out the unwanted bits. */ |
| 555 | if (*bridge_agpstat & AGPSTAT2_4X) |
| 556 | *bridge_agpstat &= ~(AGPSTAT2_1X | AGPSTAT2_2X); /* 4X */ |
| 557 | |
| 558 | if (*bridge_agpstat & AGPSTAT2_2X) |
| 559 | *bridge_agpstat &= ~(AGPSTAT2_1X | AGPSTAT2_4X); /* 2X */ |
| 560 | |
| 561 | if (*bridge_agpstat & AGPSTAT2_1X) |
| 562 | *bridge_agpstat &= ~(AGPSTAT2_2X | AGPSTAT2_4X); /* 1X */ |
| 563 | |
| 564 | /* Apply any errata. */ |
| 565 | if (agp_bridge->flags & AGP_ERRATA_FASTWRITES) |
| 566 | *bridge_agpstat &= ~AGPSTAT_FW; |
| 567 | |
| 568 | if (agp_bridge->flags & AGP_ERRATA_SBA) |
| 569 | *bridge_agpstat &= ~AGPSTAT_SBA; |
| 570 | |
| 571 | if (agp_bridge->flags & AGP_ERRATA_1X) { |
| 572 | *bridge_agpstat &= ~(AGPSTAT2_2X | AGPSTAT2_4X); |
| 573 | *bridge_agpstat |= AGPSTAT2_1X; |
| 574 | } |
| 575 | |
| 576 | /* If we've dropped down to 1X, disable fast writes. */ |
| 577 | if (*bridge_agpstat & AGPSTAT2_1X) |
| 578 | *bridge_agpstat &= ~AGPSTAT_FW; |
| 579 | } |
| 580 | |
| 581 | /* |
| 582 | * requested_mode = Mode requested by (typically) X. |
| 583 | * bridge_agpstat = PCI_AGP_STATUS from agp bridge. |
| 584 | * vga_agpstat = PCI_AGP_STATUS from graphic card. |
| 585 | */ |
| 586 | static void agp_v3_parse_one(u32 *requested_mode, u32 *bridge_agpstat, u32 *vga_agpstat) |
| 587 | { |
| 588 | u32 origbridge=*bridge_agpstat, origvga=*vga_agpstat; |
| 589 | u32 tmp; |
| 590 | |
| 591 | if (*requested_mode & AGP3_RESERVED_MASK) { |
Dave Jones | c4dd458 | 2005-11-04 15:18:56 -0800 | [diff] [blame] | 592 | printk(KERN_INFO PFX "reserved bits set (%x) in mode 0x%x. Fixed.\n", |
| 593 | *requested_mode & AGP3_RESERVED_MASK, *requested_mode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 594 | *requested_mode &= ~AGP3_RESERVED_MASK; |
| 595 | } |
| 596 | |
| 597 | /* Check the speed bits make sense. */ |
| 598 | tmp = *requested_mode & 7; |
| 599 | if (tmp == 0) { |
Dave Jones | 8c8b838 | 2005-08-17 23:08:11 -0700 | [diff] [blame] | 600 | printk(KERN_INFO PFX "%s tried to set rate=x0. Setting to AGP3 x4 mode.\n", current->comm); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 601 | *requested_mode |= AGPSTAT3_4X; |
| 602 | } |
| 603 | if (tmp >= 3) { |
Dave Jones | 8c8b838 | 2005-08-17 23:08:11 -0700 | [diff] [blame] | 604 | printk(KERN_INFO PFX "%s tried to set rate=x%d. Setting to AGP3 x8 mode.\n", current->comm, tmp * 4); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 605 | *requested_mode = (*requested_mode & ~7) | AGPSTAT3_8X; |
| 606 | } |
| 607 | |
| 608 | /* ARQSZ - Set the value to the maximum one. |
| 609 | * Don't allow the mode register to override values. */ |
| 610 | *bridge_agpstat = ((*bridge_agpstat & ~AGPSTAT_ARQSZ) | |
| 611 | max_t(u32,(*bridge_agpstat & AGPSTAT_ARQSZ),(*vga_agpstat & AGPSTAT_ARQSZ))); |
| 612 | |
| 613 | /* Calibration cycle. |
| 614 | * Don't allow the mode register to override values. */ |
| 615 | *bridge_agpstat = ((*bridge_agpstat & ~AGPSTAT_CAL_MASK) | |
| 616 | min_t(u32,(*bridge_agpstat & AGPSTAT_CAL_MASK),(*vga_agpstat & AGPSTAT_CAL_MASK))); |
| 617 | |
| 618 | /* SBA *must* be supported for AGP v3 */ |
| 619 | *bridge_agpstat |= AGPSTAT_SBA; |
| 620 | |
| 621 | /* |
| 622 | * Set speed. |
| 623 | * Check for invalid speeds. This can happen when applications |
| 624 | * written before the AGP 3.0 standard pass AGP2.x modes to AGP3 hardware |
| 625 | */ |
| 626 | if (*requested_mode & AGPSTAT_MODE_3_0) { |
| 627 | /* |
| 628 | * Caller hasn't a clue what it is doing. Bridge is in 3.0 mode, |
| 629 | * have been passed a 3.0 mode, but with 2.x speed bits set. |
| 630 | * AGP2.x 4x -> AGP3.0 4x. |
| 631 | */ |
| 632 | if (*requested_mode & AGPSTAT2_4X) { |
Dave Jones | 8c8b838 | 2005-08-17 23:08:11 -0700 | [diff] [blame] | 633 | printk(KERN_INFO PFX "%s passes broken AGP3 flags (%x). Fixed.\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 634 | current->comm, *requested_mode); |
| 635 | *requested_mode &= ~AGPSTAT2_4X; |
| 636 | *requested_mode |= AGPSTAT3_4X; |
| 637 | } |
| 638 | } else { |
| 639 | /* |
| 640 | * The caller doesn't know what they are doing. We are in 3.0 mode, |
| 641 | * but have been passed an AGP 2.x mode. |
| 642 | * Convert AGP 1x,2x,4x -> AGP 3.0 4x. |
| 643 | */ |
Dave Jones | 8c8b838 | 2005-08-17 23:08:11 -0700 | [diff] [blame] | 644 | printk(KERN_INFO PFX "%s passes broken AGP2 flags (%x) in AGP3 mode. Fixed.\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 645 | current->comm, *requested_mode); |
| 646 | *requested_mode &= ~(AGPSTAT2_4X | AGPSTAT2_2X | AGPSTAT2_1X); |
| 647 | *requested_mode |= AGPSTAT3_4X; |
| 648 | } |
| 649 | |
| 650 | if (*requested_mode & AGPSTAT3_8X) { |
| 651 | if (!(*bridge_agpstat & AGPSTAT3_8X)) { |
| 652 | *bridge_agpstat &= ~(AGPSTAT3_8X | AGPSTAT3_RSVD); |
| 653 | *bridge_agpstat |= AGPSTAT3_4X; |
Dave Jones | 8c8b838 | 2005-08-17 23:08:11 -0700 | [diff] [blame] | 654 | printk(KERN_INFO PFX "%s requested AGPx8 but bridge not capable.\n", current->comm); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 655 | return; |
| 656 | } |
| 657 | if (!(*vga_agpstat & AGPSTAT3_8X)) { |
| 658 | *bridge_agpstat &= ~(AGPSTAT3_8X | AGPSTAT3_RSVD); |
| 659 | *bridge_agpstat |= AGPSTAT3_4X; |
Dave Jones | 8c8b838 | 2005-08-17 23:08:11 -0700 | [diff] [blame] | 660 | printk(KERN_INFO PFX "%s requested AGPx8 but graphic card not capable.\n", current->comm); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 661 | return; |
| 662 | } |
| 663 | /* All set, bridge & device can do AGP x8*/ |
| 664 | *bridge_agpstat &= ~(AGPSTAT3_4X | AGPSTAT3_RSVD); |
| 665 | goto done; |
| 666 | |
Dave Jones | edf03fb | 2006-09-10 21:12:20 -0400 | [diff] [blame] | 667 | } else if (*requested_mode & AGPSTAT3_4X) { |
| 668 | *bridge_agpstat &= ~(AGPSTAT3_8X | AGPSTAT3_RSVD); |
| 669 | *bridge_agpstat |= AGPSTAT3_4X; |
| 670 | goto done; |
| 671 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 672 | } else { |
| 673 | |
| 674 | /* |
Dave Jones | edf03fb | 2006-09-10 21:12:20 -0400 | [diff] [blame] | 675 | * If we didn't specify an AGP mode, we see if both |
| 676 | * the graphics card, and the bridge can do x8, and use if so. |
| 677 | * If not, we fall back to x4 mode. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 678 | */ |
Dave Jones | edf03fb | 2006-09-10 21:12:20 -0400 | [diff] [blame] | 679 | if ((*bridge_agpstat & AGPSTAT3_8X) && (*vga_agpstat & AGPSTAT3_8X)) { |
Dave Jones | 2cc1a41 | 2006-09-28 19:50:07 -0400 | [diff] [blame] | 680 | printk(KERN_INFO PFX "No AGP mode specified. Setting to highest mode " |
| 681 | "supported by bridge & card (x8).\n"); |
Dave Jones | edf03fb | 2006-09-10 21:12:20 -0400 | [diff] [blame] | 682 | *bridge_agpstat &= ~(AGPSTAT3_4X | AGPSTAT3_RSVD); |
| 683 | *vga_agpstat &= ~(AGPSTAT3_4X | AGPSTAT3_RSVD); |
| 684 | } else { |
| 685 | printk(KERN_INFO PFX "Fell back to AGPx4 mode because"); |
| 686 | if (!(*bridge_agpstat & AGPSTAT3_8X)) { |
Dave Jones | 2cc1a41 | 2006-09-28 19:50:07 -0400 | [diff] [blame] | 687 | printk(KERN_INFO PFX "bridge couldn't do x8. bridge_agpstat:%x (orig=%x)\n", |
| 688 | *bridge_agpstat, origbridge); |
Dave Jones | edf03fb | 2006-09-10 21:12:20 -0400 | [diff] [blame] | 689 | *bridge_agpstat &= ~(AGPSTAT3_8X | AGPSTAT3_RSVD); |
| 690 | *bridge_agpstat |= AGPSTAT3_4X; |
| 691 | } |
| 692 | if (!(*vga_agpstat & AGPSTAT3_8X)) { |
Dave Jones | 2cc1a41 | 2006-09-28 19:50:07 -0400 | [diff] [blame] | 693 | printk(KERN_INFO PFX "graphics card couldn't do x8. vga_agpstat:%x (orig=%x)\n", |
| 694 | *vga_agpstat, origvga); |
Dave Jones | edf03fb | 2006-09-10 21:12:20 -0400 | [diff] [blame] | 695 | *vga_agpstat &= ~(AGPSTAT3_8X | AGPSTAT3_RSVD); |
| 696 | *vga_agpstat |= AGPSTAT3_4X; |
| 697 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 698 | } |
| 699 | } |
| 700 | |
| 701 | done: |
| 702 | /* Apply any errata. */ |
| 703 | if (agp_bridge->flags & AGP_ERRATA_FASTWRITES) |
| 704 | *bridge_agpstat &= ~AGPSTAT_FW; |
| 705 | |
| 706 | if (agp_bridge->flags & AGP_ERRATA_SBA) |
| 707 | *bridge_agpstat &= ~AGPSTAT_SBA; |
| 708 | |
| 709 | if (agp_bridge->flags & AGP_ERRATA_1X) { |
| 710 | *bridge_agpstat &= ~(AGPSTAT2_2X | AGPSTAT2_4X); |
| 711 | *bridge_agpstat |= AGPSTAT2_1X; |
| 712 | } |
| 713 | } |
| 714 | |
| 715 | |
| 716 | /** |
| 717 | * agp_collect_device_status - determine correct agp_cmd from various agp_stat's |
| 718 | * @bridge: an agp_bridge_data struct allocated for the AGP host bridge. |
| 719 | * @requested_mode: requested agp_stat from userspace (Typically from X) |
| 720 | * @bridge_agpstat: current agp_stat from AGP bridge. |
| 721 | * |
| 722 | * This function will hunt for an AGP graphics card, and try to match |
| 723 | * the requested mode to the capabilities of both the bridge and the card. |
| 724 | */ |
| 725 | u32 agp_collect_device_status(struct agp_bridge_data *bridge, u32 requested_mode, u32 bridge_agpstat) |
| 726 | { |
| 727 | struct pci_dev *device = NULL; |
| 728 | u32 vga_agpstat; |
| 729 | u8 cap_ptr; |
| 730 | |
| 731 | for (;;) { |
| 732 | device = pci_get_class(PCI_CLASS_DISPLAY_VGA << 8, device); |
| 733 | if (!device) { |
Dave Jones | 8c8b838 | 2005-08-17 23:08:11 -0700 | [diff] [blame] | 734 | printk(KERN_INFO PFX "Couldn't find an AGP VGA controller.\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 735 | return 0; |
| 736 | } |
| 737 | cap_ptr = pci_find_capability(device, PCI_CAP_ID_AGP); |
| 738 | if (cap_ptr) |
| 739 | break; |
| 740 | } |
| 741 | |
| 742 | /* |
| 743 | * Ok, here we have a AGP device. Disable impossible |
| 744 | * settings, and adjust the readqueue to the minimum. |
| 745 | */ |
| 746 | pci_read_config_dword(device, cap_ptr+PCI_AGP_STATUS, &vga_agpstat); |
| 747 | |
| 748 | /* adjust RQ depth */ |
| 749 | bridge_agpstat = ((bridge_agpstat & ~AGPSTAT_RQ_DEPTH) | |
| 750 | min_t(u32, (requested_mode & AGPSTAT_RQ_DEPTH), |
| 751 | min_t(u32, (bridge_agpstat & AGPSTAT_RQ_DEPTH), (vga_agpstat & AGPSTAT_RQ_DEPTH)))); |
| 752 | |
| 753 | /* disable FW if it's not supported */ |
| 754 | if (!((bridge_agpstat & AGPSTAT_FW) && |
| 755 | (vga_agpstat & AGPSTAT_FW) && |
| 756 | (requested_mode & AGPSTAT_FW))) |
| 757 | bridge_agpstat &= ~AGPSTAT_FW; |
| 758 | |
| 759 | /* Check to see if we are operating in 3.0 mode */ |
David Mosberger | 66bb8bf | 2005-04-04 13:29:43 -0700 | [diff] [blame] | 760 | if (agp_bridge->mode & AGPSTAT_MODE_3_0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 761 | agp_v3_parse_one(&requested_mode, &bridge_agpstat, &vga_agpstat); |
| 762 | else |
| 763 | agp_v2_parse_one(&requested_mode, &bridge_agpstat, &vga_agpstat); |
| 764 | |
| 765 | pci_dev_put(device); |
| 766 | return bridge_agpstat; |
| 767 | } |
| 768 | EXPORT_SYMBOL(agp_collect_device_status); |
| 769 | |
| 770 | |
| 771 | void agp_device_command(u32 bridge_agpstat, int agp_v3) |
| 772 | { |
| 773 | struct pci_dev *device = NULL; |
| 774 | int mode; |
| 775 | |
| 776 | mode = bridge_agpstat & 0x7; |
| 777 | if (agp_v3) |
| 778 | mode *= 4; |
| 779 | |
| 780 | for_each_pci_dev(device) { |
| 781 | u8 agp = pci_find_capability(device, PCI_CAP_ID_AGP); |
| 782 | if (!agp) |
| 783 | continue; |
| 784 | |
| 785 | printk(KERN_INFO PFX "Putting AGP V%d device at %s into %dx mode\n", |
| 786 | agp_v3 ? 3 : 2, pci_name(device), mode); |
| 787 | pci_write_config_dword(device, agp + PCI_AGP_COMMAND, bridge_agpstat); |
| 788 | } |
| 789 | } |
| 790 | EXPORT_SYMBOL(agp_device_command); |
| 791 | |
| 792 | |
| 793 | void get_agp_version(struct agp_bridge_data *bridge) |
| 794 | { |
| 795 | u32 ncapid; |
| 796 | |
| 797 | /* Exit early if already set by errata workarounds. */ |
| 798 | if (bridge->major_version != 0) |
| 799 | return; |
| 800 | |
| 801 | pci_read_config_dword(bridge->dev, bridge->capndx, &ncapid); |
| 802 | bridge->major_version = (ncapid >> AGP_MAJOR_VERSION_SHIFT) & 0xf; |
| 803 | bridge->minor_version = (ncapid >> AGP_MINOR_VERSION_SHIFT) & 0xf; |
| 804 | } |
| 805 | EXPORT_SYMBOL(get_agp_version); |
| 806 | |
| 807 | |
| 808 | void agp_generic_enable(struct agp_bridge_data *bridge, u32 requested_mode) |
| 809 | { |
| 810 | u32 bridge_agpstat, temp; |
| 811 | |
| 812 | get_agp_version(agp_bridge); |
| 813 | |
| 814 | printk(KERN_INFO PFX "Found an AGP %d.%d compliant device at %s.\n", |
| 815 | agp_bridge->major_version, |
| 816 | agp_bridge->minor_version, |
| 817 | pci_name(agp_bridge->dev)); |
| 818 | |
| 819 | pci_read_config_dword(agp_bridge->dev, |
| 820 | agp_bridge->capndx + PCI_AGP_STATUS, &bridge_agpstat); |
| 821 | |
| 822 | bridge_agpstat = agp_collect_device_status(agp_bridge, requested_mode, bridge_agpstat); |
| 823 | if (bridge_agpstat == 0) |
| 824 | /* Something bad happened. FIXME: Return error code? */ |
| 825 | return; |
| 826 | |
| 827 | bridge_agpstat |= AGPSTAT_AGP_ENABLE; |
| 828 | |
| 829 | /* Do AGP version specific frobbing. */ |
| 830 | if (bridge->major_version >= 3) { |
David Mosberger | 66bb8bf | 2005-04-04 13:29:43 -0700 | [diff] [blame] | 831 | if (bridge->mode & AGPSTAT_MODE_3_0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 832 | /* If we have 3.5, we can do the isoch stuff. */ |
| 833 | if (bridge->minor_version >= 5) |
| 834 | agp_3_5_enable(bridge); |
| 835 | agp_device_command(bridge_agpstat, TRUE); |
| 836 | return; |
| 837 | } else { |
| 838 | /* Disable calibration cycle in RX91<1> when not in AGP3.0 mode of operation.*/ |
| 839 | bridge_agpstat &= ~(7<<10) ; |
| 840 | pci_read_config_dword(bridge->dev, |
| 841 | bridge->capndx+AGPCTRL, &temp); |
| 842 | temp |= (1<<9); |
| 843 | pci_write_config_dword(bridge->dev, |
| 844 | bridge->capndx+AGPCTRL, temp); |
| 845 | |
Dave Jones | 8c8b838 | 2005-08-17 23:08:11 -0700 | [diff] [blame] | 846 | printk(KERN_INFO PFX "Device is in legacy mode," |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 847 | " falling back to 2.x\n"); |
| 848 | } |
| 849 | } |
| 850 | |
| 851 | /* AGP v<3 */ |
| 852 | agp_device_command(bridge_agpstat, FALSE); |
| 853 | } |
| 854 | EXPORT_SYMBOL(agp_generic_enable); |
| 855 | |
| 856 | |
| 857 | int agp_generic_create_gatt_table(struct agp_bridge_data *bridge) |
| 858 | { |
| 859 | char *table; |
| 860 | char *table_end; |
| 861 | int size; |
| 862 | int page_order; |
| 863 | int num_entries; |
| 864 | int i; |
| 865 | void *temp; |
| 866 | struct page *page; |
| 867 | |
| 868 | /* The generic routines can't handle 2 level gatt's */ |
| 869 | if (bridge->driver->size_type == LVL2_APER_SIZE) |
| 870 | return -EINVAL; |
| 871 | |
| 872 | table = NULL; |
| 873 | i = bridge->aperture_size_idx; |
| 874 | temp = bridge->current_size; |
| 875 | size = page_order = num_entries = 0; |
| 876 | |
| 877 | if (bridge->driver->size_type != FIXED_APER_SIZE) { |
| 878 | do { |
| 879 | switch (bridge->driver->size_type) { |
| 880 | case U8_APER_SIZE: |
| 881 | size = A_SIZE_8(temp)->size; |
| 882 | page_order = |
| 883 | A_SIZE_8(temp)->page_order; |
| 884 | num_entries = |
| 885 | A_SIZE_8(temp)->num_entries; |
| 886 | break; |
| 887 | case U16_APER_SIZE: |
| 888 | size = A_SIZE_16(temp)->size; |
| 889 | page_order = A_SIZE_16(temp)->page_order; |
| 890 | num_entries = A_SIZE_16(temp)->num_entries; |
| 891 | break; |
| 892 | case U32_APER_SIZE: |
| 893 | size = A_SIZE_32(temp)->size; |
| 894 | page_order = A_SIZE_32(temp)->page_order; |
| 895 | num_entries = A_SIZE_32(temp)->num_entries; |
| 896 | break; |
| 897 | /* This case will never really happen. */ |
| 898 | case FIXED_APER_SIZE: |
| 899 | case LVL2_APER_SIZE: |
| 900 | default: |
| 901 | size = page_order = num_entries = 0; |
| 902 | break; |
| 903 | } |
| 904 | |
Keir Fraser | 07eee78 | 2005-03-30 13:17:04 -0800 | [diff] [blame] | 905 | table = alloc_gatt_pages(page_order); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 906 | |
| 907 | if (table == NULL) { |
| 908 | i++; |
| 909 | switch (bridge->driver->size_type) { |
| 910 | case U8_APER_SIZE: |
| 911 | bridge->current_size = A_IDX8(bridge); |
| 912 | break; |
| 913 | case U16_APER_SIZE: |
| 914 | bridge->current_size = A_IDX16(bridge); |
| 915 | break; |
| 916 | case U32_APER_SIZE: |
| 917 | bridge->current_size = A_IDX32(bridge); |
| 918 | break; |
Dave Jones | 89197e3 | 2006-05-30 18:19:39 -0400 | [diff] [blame] | 919 | /* These cases will never really happen. */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 920 | case FIXED_APER_SIZE: |
| 921 | case LVL2_APER_SIZE: |
| 922 | default: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 923 | break; |
| 924 | } |
| 925 | temp = bridge->current_size; |
| 926 | } else { |
| 927 | bridge->aperture_size_idx = i; |
| 928 | } |
| 929 | } while (!table && (i < bridge->driver->num_aperture_sizes)); |
| 930 | } else { |
| 931 | size = ((struct aper_size_info_fixed *) temp)->size; |
| 932 | page_order = ((struct aper_size_info_fixed *) temp)->page_order; |
| 933 | num_entries = ((struct aper_size_info_fixed *) temp)->num_entries; |
Keir Fraser | 07eee78 | 2005-03-30 13:17:04 -0800 | [diff] [blame] | 934 | table = alloc_gatt_pages(page_order); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 935 | } |
| 936 | |
| 937 | if (table == NULL) |
| 938 | return -ENOMEM; |
| 939 | |
| 940 | table_end = table + ((PAGE_SIZE * (1 << page_order)) - 1); |
| 941 | |
| 942 | for (page = virt_to_page(table); page <= virt_to_page(table_end); page++) |
| 943 | SetPageReserved(page); |
| 944 | |
| 945 | bridge->gatt_table_real = (u32 *) table; |
| 946 | agp_gatt_table = (void *)table; |
| 947 | |
| 948 | bridge->driver->cache_flush(); |
Keir Fraser | 07eee78 | 2005-03-30 13:17:04 -0800 | [diff] [blame] | 949 | bridge->gatt_table = ioremap_nocache(virt_to_gart(table), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 950 | (PAGE_SIZE * (1 << page_order))); |
| 951 | bridge->driver->cache_flush(); |
| 952 | |
| 953 | if (bridge->gatt_table == NULL) { |
| 954 | for (page = virt_to_page(table); page <= virt_to_page(table_end); page++) |
| 955 | ClearPageReserved(page); |
| 956 | |
Keir Fraser | 07eee78 | 2005-03-30 13:17:04 -0800 | [diff] [blame] | 957 | free_gatt_pages(table, page_order); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 958 | |
| 959 | return -ENOMEM; |
| 960 | } |
Keir Fraser | 07eee78 | 2005-03-30 13:17:04 -0800 | [diff] [blame] | 961 | bridge->gatt_bus_addr = virt_to_gart(bridge->gatt_table_real); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 962 | |
| 963 | /* AK: bogus, should encode addresses > 4GB */ |
| 964 | for (i = 0; i < num_entries; i++) { |
| 965 | writel(bridge->scratch_page, bridge->gatt_table+i); |
| 966 | readl(bridge->gatt_table+i); /* PCI Posting. */ |
| 967 | } |
| 968 | |
| 969 | return 0; |
| 970 | } |
| 971 | EXPORT_SYMBOL(agp_generic_create_gatt_table); |
| 972 | |
| 973 | int agp_generic_free_gatt_table(struct agp_bridge_data *bridge) |
| 974 | { |
| 975 | int page_order; |
| 976 | char *table, *table_end; |
| 977 | void *temp; |
| 978 | struct page *page; |
| 979 | |
| 980 | temp = bridge->current_size; |
| 981 | |
| 982 | switch (bridge->driver->size_type) { |
| 983 | case U8_APER_SIZE: |
| 984 | page_order = A_SIZE_8(temp)->page_order; |
| 985 | break; |
| 986 | case U16_APER_SIZE: |
| 987 | page_order = A_SIZE_16(temp)->page_order; |
| 988 | break; |
| 989 | case U32_APER_SIZE: |
| 990 | page_order = A_SIZE_32(temp)->page_order; |
| 991 | break; |
| 992 | case FIXED_APER_SIZE: |
| 993 | page_order = A_SIZE_FIX(temp)->page_order; |
| 994 | break; |
| 995 | case LVL2_APER_SIZE: |
| 996 | /* The generic routines can't deal with 2 level gatt's */ |
| 997 | return -EINVAL; |
| 998 | break; |
| 999 | default: |
| 1000 | page_order = 0; |
| 1001 | break; |
| 1002 | } |
| 1003 | |
| 1004 | /* Do not worry about freeing memory, because if this is |
| 1005 | * called, then all agp memory is deallocated and removed |
| 1006 | * from the table. */ |
| 1007 | |
| 1008 | iounmap(bridge->gatt_table); |
| 1009 | table = (char *) bridge->gatt_table_real; |
| 1010 | table_end = table + ((PAGE_SIZE * (1 << page_order)) - 1); |
| 1011 | |
| 1012 | for (page = virt_to_page(table); page <= virt_to_page(table_end); page++) |
| 1013 | ClearPageReserved(page); |
| 1014 | |
Keir Fraser | 07eee78 | 2005-03-30 13:17:04 -0800 | [diff] [blame] | 1015 | free_gatt_pages(bridge->gatt_table_real, page_order); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1016 | |
| 1017 | agp_gatt_table = NULL; |
| 1018 | bridge->gatt_table = NULL; |
| 1019 | bridge->gatt_table_real = NULL; |
| 1020 | bridge->gatt_bus_addr = 0; |
| 1021 | |
| 1022 | return 0; |
| 1023 | } |
| 1024 | EXPORT_SYMBOL(agp_generic_free_gatt_table); |
| 1025 | |
| 1026 | |
| 1027 | int agp_generic_insert_memory(struct agp_memory * mem, off_t pg_start, int type) |
| 1028 | { |
| 1029 | int num_entries; |
| 1030 | size_t i; |
| 1031 | off_t j; |
| 1032 | void *temp; |
| 1033 | struct agp_bridge_data *bridge; |
Thomas Hellstrom | a030ce4 | 2007-01-23 10:33:43 +0100 | [diff] [blame] | 1034 | int mask_type; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1035 | |
| 1036 | bridge = mem->bridge; |
| 1037 | if (!bridge) |
| 1038 | return -EINVAL; |
| 1039 | |
Thomas Hellstrom | 5aa80c7 | 2006-12-20 16:33:41 +0100 | [diff] [blame] | 1040 | if (mem->page_count == 0) |
| 1041 | return 0; |
| 1042 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1043 | temp = bridge->current_size; |
| 1044 | |
| 1045 | switch (bridge->driver->size_type) { |
| 1046 | case U8_APER_SIZE: |
| 1047 | num_entries = A_SIZE_8(temp)->num_entries; |
| 1048 | break; |
| 1049 | case U16_APER_SIZE: |
| 1050 | num_entries = A_SIZE_16(temp)->num_entries; |
| 1051 | break; |
| 1052 | case U32_APER_SIZE: |
| 1053 | num_entries = A_SIZE_32(temp)->num_entries; |
| 1054 | break; |
| 1055 | case FIXED_APER_SIZE: |
| 1056 | num_entries = A_SIZE_FIX(temp)->num_entries; |
| 1057 | break; |
| 1058 | case LVL2_APER_SIZE: |
| 1059 | /* The generic routines can't deal with 2 level gatt's */ |
| 1060 | return -EINVAL; |
| 1061 | break; |
| 1062 | default: |
| 1063 | num_entries = 0; |
| 1064 | break; |
| 1065 | } |
| 1066 | |
| 1067 | num_entries -= agp_memory_reserved/PAGE_SIZE; |
| 1068 | if (num_entries < 0) num_entries = 0; |
| 1069 | |
Andrew Morton | 1c14cfb | 2007-02-05 16:09:35 -0800 | [diff] [blame^] | 1070 | if (type != mem->type) |
Thomas Hellstrom | a030ce4 | 2007-01-23 10:33:43 +0100 | [diff] [blame] | 1071 | return -EINVAL; |
Thomas Hellstrom | a030ce4 | 2007-01-23 10:33:43 +0100 | [diff] [blame] | 1072 | |
| 1073 | mask_type = bridge->driver->agp_type_to_mask_type(bridge, type); |
| 1074 | if (mask_type != 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1075 | /* The generic routines know nothing of memory types */ |
| 1076 | return -EINVAL; |
| 1077 | } |
| 1078 | |
| 1079 | /* AK: could wrap */ |
| 1080 | if ((pg_start + mem->page_count) > num_entries) |
| 1081 | return -EINVAL; |
| 1082 | |
| 1083 | j = pg_start; |
| 1084 | |
| 1085 | while (j < (pg_start + mem->page_count)) { |
| 1086 | if (!PGE_EMPTY(bridge, readl(bridge->gatt_table+j))) |
| 1087 | return -EBUSY; |
| 1088 | j++; |
| 1089 | } |
| 1090 | |
| 1091 | if (mem->is_flushed == FALSE) { |
| 1092 | bridge->driver->cache_flush(); |
| 1093 | mem->is_flushed = TRUE; |
| 1094 | } |
| 1095 | |
| 1096 | for (i = 0, j = pg_start; i < mem->page_count; i++, j++) { |
Thomas Hellstrom | a030ce4 | 2007-01-23 10:33:43 +0100 | [diff] [blame] | 1097 | writel(bridge->driver->mask_memory(bridge, mem->memory[i], mask_type), |
| 1098 | bridge->gatt_table+j); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1099 | } |
Thomas Hellstrom | 5aa80c7 | 2006-12-20 16:33:41 +0100 | [diff] [blame] | 1100 | readl(bridge->gatt_table+j-1); /* PCI Posting. */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1101 | |
| 1102 | bridge->driver->tlb_flush(mem); |
| 1103 | return 0; |
| 1104 | } |
| 1105 | EXPORT_SYMBOL(agp_generic_insert_memory); |
| 1106 | |
| 1107 | |
| 1108 | int agp_generic_remove_memory(struct agp_memory *mem, off_t pg_start, int type) |
| 1109 | { |
| 1110 | size_t i; |
| 1111 | struct agp_bridge_data *bridge; |
Thomas Hellstrom | a030ce4 | 2007-01-23 10:33:43 +0100 | [diff] [blame] | 1112 | int mask_type; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1113 | |
| 1114 | bridge = mem->bridge; |
| 1115 | if (!bridge) |
| 1116 | return -EINVAL; |
| 1117 | |
Thomas Hellstrom | 5aa80c7 | 2006-12-20 16:33:41 +0100 | [diff] [blame] | 1118 | if (mem->page_count == 0) |
| 1119 | return 0; |
| 1120 | |
Thomas Hellstrom | a030ce4 | 2007-01-23 10:33:43 +0100 | [diff] [blame] | 1121 | if (type != mem->type) |
| 1122 | return -EINVAL; |
| 1123 | |
| 1124 | mask_type = bridge->driver->agp_type_to_mask_type(bridge, type); |
| 1125 | if (mask_type != 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1126 | /* The generic routines know nothing of memory types */ |
| 1127 | return -EINVAL; |
| 1128 | } |
| 1129 | |
| 1130 | /* AK: bogus, should encode addresses > 4GB */ |
| 1131 | for (i = pg_start; i < (mem->page_count + pg_start); i++) { |
| 1132 | writel(bridge->scratch_page, bridge->gatt_table+i); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1133 | } |
Thomas Hellstrom | 5aa80c7 | 2006-12-20 16:33:41 +0100 | [diff] [blame] | 1134 | readl(bridge->gatt_table+i-1); /* PCI Posting. */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1135 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1136 | bridge->driver->tlb_flush(mem); |
| 1137 | return 0; |
| 1138 | } |
| 1139 | EXPORT_SYMBOL(agp_generic_remove_memory); |
| 1140 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1141 | struct agp_memory *agp_generic_alloc_by_type(size_t page_count, int type) |
| 1142 | { |
| 1143 | return NULL; |
| 1144 | } |
| 1145 | EXPORT_SYMBOL(agp_generic_alloc_by_type); |
| 1146 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1147 | void agp_generic_free_by_type(struct agp_memory *curr) |
| 1148 | { |
Thomas Hellstrom | a030ce4 | 2007-01-23 10:33:43 +0100 | [diff] [blame] | 1149 | agp_free_page_array(curr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1150 | agp_free_key(curr->key); |
| 1151 | kfree(curr); |
| 1152 | } |
| 1153 | EXPORT_SYMBOL(agp_generic_free_by_type); |
| 1154 | |
Thomas Hellstrom | a030ce4 | 2007-01-23 10:33:43 +0100 | [diff] [blame] | 1155 | struct agp_memory *agp_generic_alloc_user(size_t page_count, int type) |
| 1156 | { |
| 1157 | struct agp_memory *new; |
| 1158 | int i; |
| 1159 | int pages; |
| 1160 | |
| 1161 | pages = (page_count + ENTRIES_PER_PAGE - 1) / ENTRIES_PER_PAGE; |
| 1162 | new = agp_create_user_memory(page_count); |
| 1163 | if (new == NULL) |
| 1164 | return NULL; |
| 1165 | |
Andrew Morton | 1c14cfb | 2007-02-05 16:09:35 -0800 | [diff] [blame^] | 1166 | for (i = 0; i < page_count; i++) |
Thomas Hellstrom | a030ce4 | 2007-01-23 10:33:43 +0100 | [diff] [blame] | 1167 | new->memory[i] = 0; |
Thomas Hellstrom | a030ce4 | 2007-01-23 10:33:43 +0100 | [diff] [blame] | 1168 | new->page_count = 0; |
| 1169 | new->type = type; |
| 1170 | new->num_scratch_pages = pages; |
| 1171 | |
| 1172 | return new; |
| 1173 | } |
| 1174 | EXPORT_SYMBOL(agp_generic_alloc_user); |
| 1175 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1176 | /* |
| 1177 | * Basic Page Allocation Routines - |
| 1178 | * These routines handle page allocation and by default they reserve the allocated |
| 1179 | * memory. They also handle incrementing the current_memory_agp value, Which is checked |
| 1180 | * against a maximum value. |
| 1181 | */ |
| 1182 | |
| 1183 | void *agp_generic_alloc_page(struct agp_bridge_data *bridge) |
| 1184 | { |
| 1185 | struct page * page; |
| 1186 | |
Linus Torvalds | 66c669b | 2006-11-22 14:55:29 -0800 | [diff] [blame] | 1187 | page = alloc_page(GFP_KERNEL | GFP_DMA32); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1188 | if (page == NULL) |
| 1189 | return NULL; |
| 1190 | |
| 1191 | map_page_into_agp(page); |
| 1192 | |
| 1193 | get_page(page); |
| 1194 | SetPageLocked(page); |
| 1195 | atomic_inc(&agp_bridge->current_memory_agp); |
| 1196 | return page_address(page); |
| 1197 | } |
| 1198 | EXPORT_SYMBOL(agp_generic_alloc_page); |
| 1199 | |
| 1200 | |
| 1201 | void agp_generic_destroy_page(void *addr) |
| 1202 | { |
| 1203 | struct page *page; |
| 1204 | |
| 1205 | if (addr == NULL) |
| 1206 | return; |
| 1207 | |
| 1208 | page = virt_to_page(addr); |
| 1209 | unmap_page_from_agp(page); |
| 1210 | put_page(page); |
| 1211 | unlock_page(page); |
| 1212 | free_page((unsigned long)addr); |
| 1213 | atomic_dec(&agp_bridge->current_memory_agp); |
| 1214 | } |
| 1215 | EXPORT_SYMBOL(agp_generic_destroy_page); |
| 1216 | |
| 1217 | /* End Basic Page Allocation Routines */ |
| 1218 | |
| 1219 | |
| 1220 | /** |
| 1221 | * agp_enable - initialise the agp point-to-point connection. |
| 1222 | * |
| 1223 | * @mode: agp mode register value to configure with. |
| 1224 | */ |
| 1225 | void agp_enable(struct agp_bridge_data *bridge, u32 mode) |
| 1226 | { |
| 1227 | if (!bridge) |
| 1228 | return; |
| 1229 | bridge->driver->agp_enable(bridge, mode); |
| 1230 | } |
| 1231 | EXPORT_SYMBOL(agp_enable); |
| 1232 | |
| 1233 | /* When we remove the global variable agp_bridge from all drivers |
| 1234 | * then agp_alloc_bridge and agp_generic_find_bridge need to be updated |
| 1235 | */ |
| 1236 | |
| 1237 | struct agp_bridge_data *agp_generic_find_bridge(struct pci_dev *pdev) |
| 1238 | { |
| 1239 | if (list_empty(&agp_bridges)) |
| 1240 | return NULL; |
| 1241 | |
| 1242 | return agp_bridge; |
| 1243 | } |
| 1244 | |
| 1245 | static void ipi_handler(void *null) |
| 1246 | { |
| 1247 | flush_agp_cache(); |
| 1248 | } |
| 1249 | |
| 1250 | void global_cache_flush(void) |
| 1251 | { |
| 1252 | if (on_each_cpu(ipi_handler, NULL, 1, 1) != 0) |
| 1253 | panic(PFX "timed out waiting for the other CPUs!\n"); |
| 1254 | } |
| 1255 | EXPORT_SYMBOL(global_cache_flush); |
| 1256 | |
| 1257 | unsigned long agp_generic_mask_memory(struct agp_bridge_data *bridge, |
| 1258 | unsigned long addr, int type) |
| 1259 | { |
| 1260 | /* memory type is ignored in the generic routine */ |
| 1261 | if (bridge->driver->masks) |
| 1262 | return addr | bridge->driver->masks[0].mask; |
| 1263 | else |
| 1264 | return addr; |
| 1265 | } |
| 1266 | EXPORT_SYMBOL(agp_generic_mask_memory); |
| 1267 | |
Thomas Hellstrom | a030ce4 | 2007-01-23 10:33:43 +0100 | [diff] [blame] | 1268 | int agp_generic_type_to_mask_type(struct agp_bridge_data *bridge, |
| 1269 | int type) |
| 1270 | { |
| 1271 | if (type >= AGP_USER_TYPES) |
| 1272 | return 0; |
| 1273 | return type; |
| 1274 | } |
| 1275 | EXPORT_SYMBOL(agp_generic_type_to_mask_type); |
| 1276 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1277 | /* |
| 1278 | * These functions are implemented according to the AGPv3 spec, |
| 1279 | * which covers implementation details that had previously been |
| 1280 | * left open. |
| 1281 | */ |
| 1282 | |
| 1283 | int agp3_generic_fetch_size(void) |
| 1284 | { |
| 1285 | u16 temp_size; |
| 1286 | int i; |
| 1287 | struct aper_size_info_16 *values; |
| 1288 | |
| 1289 | pci_read_config_word(agp_bridge->dev, agp_bridge->capndx+AGPAPSIZE, &temp_size); |
| 1290 | values = A_SIZE_16(agp_bridge->driver->aperture_sizes); |
| 1291 | |
| 1292 | for (i = 0; i < agp_bridge->driver->num_aperture_sizes; i++) { |
| 1293 | if (temp_size == values[i].size_value) { |
| 1294 | agp_bridge->previous_size = |
| 1295 | agp_bridge->current_size = (void *) (values + i); |
| 1296 | |
| 1297 | agp_bridge->aperture_size_idx = i; |
| 1298 | return values[i].size; |
| 1299 | } |
| 1300 | } |
| 1301 | return 0; |
| 1302 | } |
| 1303 | EXPORT_SYMBOL(agp3_generic_fetch_size); |
| 1304 | |
| 1305 | void agp3_generic_tlbflush(struct agp_memory *mem) |
| 1306 | { |
| 1307 | u32 ctrl; |
| 1308 | pci_read_config_dword(agp_bridge->dev, agp_bridge->capndx+AGPCTRL, &ctrl); |
| 1309 | pci_write_config_dword(agp_bridge->dev, agp_bridge->capndx+AGPCTRL, ctrl & ~AGPCTRL_GTLBEN); |
| 1310 | pci_write_config_dword(agp_bridge->dev, agp_bridge->capndx+AGPCTRL, ctrl); |
| 1311 | } |
| 1312 | EXPORT_SYMBOL(agp3_generic_tlbflush); |
| 1313 | |
| 1314 | int agp3_generic_configure(void) |
| 1315 | { |
| 1316 | u32 temp; |
| 1317 | struct aper_size_info_16 *current_size; |
| 1318 | |
| 1319 | current_size = A_SIZE_16(agp_bridge->current_size); |
| 1320 | |
| 1321 | pci_read_config_dword(agp_bridge->dev, AGP_APBASE, &temp); |
| 1322 | agp_bridge->gart_bus_addr = (temp & PCI_BASE_ADDRESS_MEM_MASK); |
| 1323 | |
| 1324 | /* set aperture size */ |
| 1325 | pci_write_config_word(agp_bridge->dev, agp_bridge->capndx+AGPAPSIZE, current_size->size_value); |
| 1326 | /* set gart pointer */ |
| 1327 | pci_write_config_dword(agp_bridge->dev, agp_bridge->capndx+AGPGARTLO, agp_bridge->gatt_bus_addr); |
| 1328 | /* enable aperture and GTLB */ |
| 1329 | pci_read_config_dword(agp_bridge->dev, agp_bridge->capndx+AGPCTRL, &temp); |
| 1330 | pci_write_config_dword(agp_bridge->dev, agp_bridge->capndx+AGPCTRL, temp | AGPCTRL_APERENB | AGPCTRL_GTLBEN); |
| 1331 | return 0; |
| 1332 | } |
| 1333 | EXPORT_SYMBOL(agp3_generic_configure); |
| 1334 | |
| 1335 | void agp3_generic_cleanup(void) |
| 1336 | { |
| 1337 | u32 ctrl; |
| 1338 | pci_read_config_dword(agp_bridge->dev, agp_bridge->capndx+AGPCTRL, &ctrl); |
| 1339 | pci_write_config_dword(agp_bridge->dev, agp_bridge->capndx+AGPCTRL, ctrl & ~AGPCTRL_APERENB); |
| 1340 | } |
| 1341 | EXPORT_SYMBOL(agp3_generic_cleanup); |
| 1342 | |
| 1343 | struct aper_size_info_16 agp3_generic_sizes[AGP_GENERIC_SIZES_ENTRIES] = |
| 1344 | { |
| 1345 | {4096, 1048576, 10,0x000}, |
| 1346 | {2048, 524288, 9, 0x800}, |
| 1347 | {1024, 262144, 8, 0xc00}, |
| 1348 | { 512, 131072, 7, 0xe00}, |
| 1349 | { 256, 65536, 6, 0xf00}, |
| 1350 | { 128, 32768, 5, 0xf20}, |
| 1351 | { 64, 16384, 4, 0xf30}, |
| 1352 | { 32, 8192, 3, 0xf38}, |
| 1353 | { 16, 4096, 2, 0xf3c}, |
| 1354 | { 8, 2048, 1, 0xf3e}, |
| 1355 | { 4, 1024, 0, 0xf3f} |
| 1356 | }; |
| 1357 | EXPORT_SYMBOL(agp3_generic_sizes); |
| 1358 | |