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> |
Alexey Dobriyan | e8edc6e | 2007-05-21 01:22:52 +0400 | [diff] [blame] | 40 | #include <linux/sched.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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; |
| 47 | int 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 | */ |
| 53 | EXPORT_SYMBOL_GPL(agp_memory_reserved); |
| 54 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
| 60 | void 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 | } |
| 68 | EXPORT_SYMBOL(agp_free_key); |
| 69 | |
| 70 | |
| 71 | static 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 | |
Dave Airlie | a13af4b | 2007-10-29 15:14:03 +1000 | [diff] [blame] | 83 | void agp_flush_chipset(struct agp_bridge_data *bridge) |
| 84 | { |
| 85 | if (bridge->driver->chipset_flush) |
| 86 | bridge->driver->chipset_flush(bridge); |
| 87 | } |
| 88 | EXPORT_SYMBOL(agp_flush_chipset); |
| 89 | |
Thomas Hellstrom | a030ce4 | 2007-01-23 10:33:43 +0100 | [diff] [blame] | 90 | /* |
| 91 | * Use kmalloc if possible for the page list. Otherwise fall back to |
| 92 | * vmalloc. This speeds things up and also saves memory for small AGP |
| 93 | * regions. |
| 94 | */ |
| 95 | |
| 96 | void agp_alloc_page_array(size_t size, struct agp_memory *mem) |
| 97 | { |
Dave Airlie | 07613ba | 2009-06-12 14:11:41 +1000 | [diff] [blame] | 98 | mem->pages = NULL; |
Dave Airlie | 9516b03 | 2008-06-19 10:42:17 +1000 | [diff] [blame] | 99 | mem->vmalloc_flag = false; |
Thomas Hellstrom | a030ce4 | 2007-01-23 10:33:43 +0100 | [diff] [blame] | 100 | |
Andrew Morton | 1c14cfb | 2007-02-05 16:09:35 -0800 | [diff] [blame] | 101 | if (size <= 2*PAGE_SIZE) |
Dave Airlie | 07613ba | 2009-06-12 14:11:41 +1000 | [diff] [blame] | 102 | mem->pages = kmalloc(size, GFP_KERNEL | __GFP_NORETRY); |
| 103 | if (mem->pages == NULL) { |
| 104 | mem->pages = vmalloc(size); |
Dave Airlie | 9516b03 | 2008-06-19 10:42:17 +1000 | [diff] [blame] | 105 | mem->vmalloc_flag = true; |
Thomas Hellstrom | a030ce4 | 2007-01-23 10:33:43 +0100 | [diff] [blame] | 106 | } |
| 107 | } |
| 108 | EXPORT_SYMBOL(agp_alloc_page_array); |
| 109 | |
| 110 | void agp_free_page_array(struct agp_memory *mem) |
| 111 | { |
| 112 | if (mem->vmalloc_flag) { |
Dave Airlie | 07613ba | 2009-06-12 14:11:41 +1000 | [diff] [blame] | 113 | vfree(mem->pages); |
Thomas Hellstrom | a030ce4 | 2007-01-23 10:33:43 +0100 | [diff] [blame] | 114 | } else { |
Dave Airlie | 07613ba | 2009-06-12 14:11:41 +1000 | [diff] [blame] | 115 | kfree(mem->pages); |
Thomas Hellstrom | a030ce4 | 2007-01-23 10:33:43 +0100 | [diff] [blame] | 116 | } |
| 117 | } |
| 118 | EXPORT_SYMBOL(agp_free_page_array); |
| 119 | |
| 120 | |
| 121 | static struct agp_memory *agp_create_user_memory(unsigned long num_agp_pages) |
| 122 | { |
| 123 | struct agp_memory *new; |
| 124 | unsigned long alloc_size = num_agp_pages*sizeof(struct page *); |
| 125 | |
Andrew Morton | 1c14cfb | 2007-02-05 16:09:35 -0800 | [diff] [blame] | 126 | new = kzalloc(sizeof(struct agp_memory), GFP_KERNEL); |
Thomas Hellstrom | a030ce4 | 2007-01-23 10:33:43 +0100 | [diff] [blame] | 127 | if (new == NULL) |
| 128 | return NULL; |
| 129 | |
Thomas Hellstrom | a030ce4 | 2007-01-23 10:33:43 +0100 | [diff] [blame] | 130 | new->key = agp_get_key(); |
| 131 | |
| 132 | if (new->key < 0) { |
| 133 | kfree(new); |
| 134 | return NULL; |
| 135 | } |
| 136 | |
| 137 | agp_alloc_page_array(alloc_size, new); |
| 138 | |
Dave Airlie | 07613ba | 2009-06-12 14:11:41 +1000 | [diff] [blame] | 139 | if (new->pages == NULL) { |
Thomas Hellstrom | a030ce4 | 2007-01-23 10:33:43 +0100 | [diff] [blame] | 140 | agp_free_key(new->key); |
| 141 | kfree(new); |
| 142 | return NULL; |
| 143 | } |
| 144 | new->num_scratch_pages = 0; |
| 145 | return new; |
| 146 | } |
| 147 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 148 | struct agp_memory *agp_create_memory(int scratch_pages) |
| 149 | { |
| 150 | struct agp_memory *new; |
| 151 | |
Dave Jones | 0ea27d9 | 2005-10-20 15:12:16 -0700 | [diff] [blame] | 152 | new = kzalloc(sizeof(struct agp_memory), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 153 | if (new == NULL) |
| 154 | return NULL; |
| 155 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 156 | new->key = agp_get_key(); |
| 157 | |
| 158 | if (new->key < 0) { |
| 159 | kfree(new); |
| 160 | return NULL; |
| 161 | } |
Thomas Hellstrom | a030ce4 | 2007-01-23 10:33:43 +0100 | [diff] [blame] | 162 | |
| 163 | agp_alloc_page_array(PAGE_SIZE * scratch_pages, new); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 164 | |
Dave Airlie | 07613ba | 2009-06-12 14:11:41 +1000 | [diff] [blame] | 165 | if (new->pages == NULL) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 166 | agp_free_key(new->key); |
| 167 | kfree(new); |
| 168 | return NULL; |
| 169 | } |
| 170 | new->num_scratch_pages = scratch_pages; |
Thomas Hellstrom | a030ce4 | 2007-01-23 10:33:43 +0100 | [diff] [blame] | 171 | new->type = AGP_NORMAL_MEMORY; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 172 | return new; |
| 173 | } |
| 174 | EXPORT_SYMBOL(agp_create_memory); |
| 175 | |
| 176 | /** |
| 177 | * agp_free_memory - free memory associated with an agp_memory pointer. |
| 178 | * |
| 179 | * @curr: agp_memory pointer to be freed. |
| 180 | * |
| 181 | * It is the only function that can be called when the backend is not owned |
| 182 | * by the caller. (So it can free memory on client death.) |
| 183 | */ |
| 184 | void agp_free_memory(struct agp_memory *curr) |
| 185 | { |
| 186 | size_t i; |
| 187 | |
| 188 | if (curr == NULL) |
| 189 | return; |
| 190 | |
Joe Perches | c725801 | 2008-03-26 14:10:02 -0700 | [diff] [blame] | 191 | if (curr->is_bound) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 192 | agp_unbind_memory(curr); |
| 193 | |
Thomas Hellstrom | a030ce4 | 2007-01-23 10:33:43 +0100 | [diff] [blame] | 194 | if (curr->type >= AGP_USER_TYPES) { |
| 195 | agp_generic_free_by_type(curr); |
| 196 | return; |
| 197 | } |
| 198 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 199 | if (curr->type != 0) { |
| 200 | curr->bridge->driver->free_by_type(curr); |
| 201 | return; |
| 202 | } |
| 203 | if (curr->page_count != 0) { |
Shaohua Li | bd07928 | 2008-08-21 10:46:17 +0800 | [diff] [blame] | 204 | if (curr->bridge->driver->agp_destroy_pages) { |
| 205 | curr->bridge->driver->agp_destroy_pages(curr); |
| 206 | } else { |
| 207 | |
| 208 | for (i = 0; i < curr->page_count; i++) { |
Shaohua Li | bd07928 | 2008-08-21 10:46:17 +0800 | [diff] [blame] | 209 | curr->bridge->driver->agp_destroy_page( |
Dave Airlie | 07613ba | 2009-06-12 14:11:41 +1000 | [diff] [blame] | 210 | curr->pages[i], |
Shaohua Li | bd07928 | 2008-08-21 10:46:17 +0800 | [diff] [blame] | 211 | AGP_PAGE_DESTROY_UNMAP); |
| 212 | } |
| 213 | for (i = 0; i < curr->page_count; i++) { |
| 214 | curr->bridge->driver->agp_destroy_page( |
Dave Airlie | 07613ba | 2009-06-12 14:11:41 +1000 | [diff] [blame] | 215 | curr->pages[i], |
Shaohua Li | bd07928 | 2008-08-21 10:46:17 +0800 | [diff] [blame] | 216 | AGP_PAGE_DESTROY_FREE); |
| 217 | } |
Dave Airlie | a2721e9 | 2007-10-15 10:19:16 +1000 | [diff] [blame] | 218 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 219 | } |
| 220 | agp_free_key(curr->key); |
Thomas Hellstrom | a030ce4 | 2007-01-23 10:33:43 +0100 | [diff] [blame] | 221 | agp_free_page_array(curr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 222 | kfree(curr); |
| 223 | } |
| 224 | EXPORT_SYMBOL(agp_free_memory); |
| 225 | |
| 226 | #define ENTRIES_PER_PAGE (PAGE_SIZE / sizeof(unsigned long)) |
| 227 | |
| 228 | /** |
| 229 | * agp_allocate_memory - allocate a group of pages of a certain type. |
| 230 | * |
| 231 | * @page_count: size_t argument of the number of pages |
| 232 | * @type: u32 argument of the type of memory to be allocated. |
| 233 | * |
| 234 | * Every agp bridge device will allow you to allocate AGP_NORMAL_MEMORY which |
| 235 | * maps to physical ram. Any other type is device dependent. |
| 236 | * |
| 237 | * It returns NULL whenever memory is unavailable. |
| 238 | */ |
| 239 | struct agp_memory *agp_allocate_memory(struct agp_bridge_data *bridge, |
| 240 | size_t page_count, u32 type) |
| 241 | { |
| 242 | int scratch_pages; |
| 243 | struct agp_memory *new; |
| 244 | size_t i; |
| 245 | |
| 246 | if (!bridge) |
| 247 | return NULL; |
| 248 | |
| 249 | if ((atomic_read(&bridge->current_memory_agp) + page_count) > bridge->max_memory_agp) |
| 250 | return NULL; |
| 251 | |
Thomas Hellstrom | a030ce4 | 2007-01-23 10:33:43 +0100 | [diff] [blame] | 252 | if (type >= AGP_USER_TYPES) { |
| 253 | new = agp_generic_alloc_user(page_count, type); |
| 254 | if (new) |
| 255 | new->bridge = bridge; |
| 256 | return new; |
| 257 | } |
| 258 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 259 | if (type != 0) { |
| 260 | new = bridge->driver->alloc_by_type(page_count, type); |
| 261 | if (new) |
| 262 | new->bridge = bridge; |
| 263 | return new; |
| 264 | } |
| 265 | |
| 266 | scratch_pages = (page_count + ENTRIES_PER_PAGE - 1) / ENTRIES_PER_PAGE; |
| 267 | |
| 268 | new = agp_create_memory(scratch_pages); |
| 269 | |
| 270 | if (new == NULL) |
| 271 | return NULL; |
| 272 | |
Shaohua Li | 37acee1 | 2008-08-21 10:46:11 +0800 | [diff] [blame] | 273 | if (bridge->driver->agp_alloc_pages) { |
| 274 | if (bridge->driver->agp_alloc_pages(bridge, new, page_count)) { |
| 275 | agp_free_memory(new); |
| 276 | return NULL; |
| 277 | } |
| 278 | new->bridge = bridge; |
| 279 | return new; |
| 280 | } |
| 281 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 282 | for (i = 0; i < page_count; i++) { |
Dave Airlie | 07613ba | 2009-06-12 14:11:41 +1000 | [diff] [blame] | 283 | struct page *page = bridge->driver->agp_alloc_page(bridge); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 284 | |
Dave Airlie | 07613ba | 2009-06-12 14:11:41 +1000 | [diff] [blame] | 285 | if (page == NULL) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 286 | agp_free_memory(new); |
| 287 | return NULL; |
| 288 | } |
Dave Airlie | 07613ba | 2009-06-12 14:11:41 +1000 | [diff] [blame] | 289 | new->pages[i] = page; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 290 | new->page_count++; |
| 291 | } |
Alan Hourihane | 88d5196 | 2005-11-06 23:35:34 -0800 | [diff] [blame] | 292 | new->bridge = bridge; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 293 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 294 | return new; |
| 295 | } |
| 296 | EXPORT_SYMBOL(agp_allocate_memory); |
| 297 | |
| 298 | |
| 299 | /* End - Generic routines for handling agp_memory structures */ |
| 300 | |
| 301 | |
| 302 | static int agp_return_size(void) |
| 303 | { |
| 304 | int current_size; |
| 305 | void *temp; |
| 306 | |
| 307 | temp = agp_bridge->current_size; |
| 308 | |
| 309 | switch (agp_bridge->driver->size_type) { |
| 310 | case U8_APER_SIZE: |
| 311 | current_size = A_SIZE_8(temp)->size; |
| 312 | break; |
| 313 | case U16_APER_SIZE: |
| 314 | current_size = A_SIZE_16(temp)->size; |
| 315 | break; |
| 316 | case U32_APER_SIZE: |
| 317 | current_size = A_SIZE_32(temp)->size; |
| 318 | break; |
| 319 | case LVL2_APER_SIZE: |
| 320 | current_size = A_SIZE_LVL2(temp)->size; |
| 321 | break; |
| 322 | case FIXED_APER_SIZE: |
| 323 | current_size = A_SIZE_FIX(temp)->size; |
| 324 | break; |
| 325 | default: |
| 326 | current_size = 0; |
| 327 | break; |
| 328 | } |
| 329 | |
| 330 | current_size -= (agp_memory_reserved / (1024*1024)); |
| 331 | if (current_size <0) |
| 332 | current_size = 0; |
| 333 | return current_size; |
| 334 | } |
| 335 | |
| 336 | |
| 337 | int agp_num_entries(void) |
| 338 | { |
| 339 | int num_entries; |
| 340 | void *temp; |
| 341 | |
| 342 | temp = agp_bridge->current_size; |
| 343 | |
| 344 | switch (agp_bridge->driver->size_type) { |
| 345 | case U8_APER_SIZE: |
| 346 | num_entries = A_SIZE_8(temp)->num_entries; |
| 347 | break; |
| 348 | case U16_APER_SIZE: |
| 349 | num_entries = A_SIZE_16(temp)->num_entries; |
| 350 | break; |
| 351 | case U32_APER_SIZE: |
| 352 | num_entries = A_SIZE_32(temp)->num_entries; |
| 353 | break; |
| 354 | case LVL2_APER_SIZE: |
| 355 | num_entries = A_SIZE_LVL2(temp)->num_entries; |
| 356 | break; |
| 357 | case FIXED_APER_SIZE: |
| 358 | num_entries = A_SIZE_FIX(temp)->num_entries; |
| 359 | break; |
| 360 | default: |
| 361 | num_entries = 0; |
| 362 | break; |
| 363 | } |
| 364 | |
| 365 | num_entries -= agp_memory_reserved>>PAGE_SHIFT; |
| 366 | if (num_entries<0) |
| 367 | num_entries = 0; |
| 368 | return num_entries; |
| 369 | } |
| 370 | EXPORT_SYMBOL_GPL(agp_num_entries); |
| 371 | |
| 372 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 373 | /** |
| 374 | * agp_copy_info - copy bridge state information |
| 375 | * |
Dave Jones | 6a92a4e | 2006-02-28 00:54:25 -0500 | [diff] [blame] | 376 | * @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] | 377 | * |
| 378 | * This function copies information about the agp bridge device and the state of |
| 379 | * the agp backend into an agp_kern_info pointer. |
| 380 | */ |
| 381 | int agp_copy_info(struct agp_bridge_data *bridge, struct agp_kern_info *info) |
| 382 | { |
| 383 | memset(info, 0, sizeof(struct agp_kern_info)); |
| 384 | if (!bridge) { |
| 385 | info->chipset = NOT_SUPPORTED; |
| 386 | return -EIO; |
| 387 | } |
| 388 | |
| 389 | info->version.major = bridge->version->major; |
| 390 | info->version.minor = bridge->version->minor; |
| 391 | info->chipset = SUPPORTED; |
| 392 | info->device = bridge->dev; |
David Mosberger | 66bb8bf | 2005-04-04 13:29:43 -0700 | [diff] [blame] | 393 | if (bridge->mode & AGPSTAT_MODE_3_0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 394 | info->mode = bridge->mode & ~AGP3_RESERVED_MASK; |
| 395 | else |
| 396 | info->mode = bridge->mode & ~AGP2_RESERVED_MASK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 397 | info->aper_base = bridge->gart_bus_addr; |
| 398 | info->aper_size = agp_return_size(); |
| 399 | info->max_memory = bridge->max_memory_agp; |
| 400 | info->current_memory = atomic_read(&bridge->current_memory_agp); |
| 401 | info->cant_use_aperture = bridge->driver->cant_use_aperture; |
| 402 | info->vm_ops = bridge->vm_ops; |
| 403 | info->page_mask = ~0UL; |
| 404 | return 0; |
| 405 | } |
| 406 | EXPORT_SYMBOL(agp_copy_info); |
| 407 | |
| 408 | /* End - Routine to copy over information structure */ |
| 409 | |
| 410 | /* |
| 411 | * Routines for handling swapping of agp_memory into the GATT - |
| 412 | * These routines take agp_memory and insert them into the GATT. |
| 413 | * They call device specific routines to actually write to the GATT. |
| 414 | */ |
| 415 | |
| 416 | /** |
| 417 | * agp_bind_memory - Bind an agp_memory structure into the GATT. |
| 418 | * |
| 419 | * @curr: agp_memory pointer |
| 420 | * @pg_start: an offset into the graphics aperture translation table |
| 421 | * |
| 422 | * It returns -EINVAL if the pointer == NULL. |
| 423 | * It returns -EBUSY if the area of the table requested is already in use. |
| 424 | */ |
| 425 | int agp_bind_memory(struct agp_memory *curr, off_t pg_start) |
| 426 | { |
| 427 | int ret_val; |
| 428 | |
| 429 | if (curr == NULL) |
| 430 | return -EINVAL; |
| 431 | |
Joe Perches | c725801 | 2008-03-26 14:10:02 -0700 | [diff] [blame] | 432 | if (curr->is_bound) { |
Dave Jones | 8c8b838 | 2005-08-17 23:08:11 -0700 | [diff] [blame] | 433 | printk(KERN_INFO PFX "memory %p is already bound!\n", curr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 434 | return -EINVAL; |
| 435 | } |
Joe Perches | c725801 | 2008-03-26 14:10:02 -0700 | [diff] [blame] | 436 | if (!curr->is_flushed) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 437 | curr->bridge->driver->cache_flush(); |
Joe Perches | c725801 | 2008-03-26 14:10:02 -0700 | [diff] [blame] | 438 | curr->is_flushed = true; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 439 | } |
| 440 | ret_val = curr->bridge->driver->insert_memory(curr, pg_start, curr->type); |
| 441 | |
| 442 | if (ret_val != 0) |
| 443 | return ret_val; |
| 444 | |
Joe Perches | c725801 | 2008-03-26 14:10:02 -0700 | [diff] [blame] | 445 | curr->is_bound = true; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 446 | curr->pg_start = pg_start; |
Keith Packard | a8c84df | 2008-07-31 15:48:07 +1000 | [diff] [blame] | 447 | spin_lock(&agp_bridge->mapped_lock); |
| 448 | list_add(&curr->mapped_list, &agp_bridge->mapped_list); |
| 449 | spin_unlock(&agp_bridge->mapped_lock); |
| 450 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 451 | return 0; |
| 452 | } |
| 453 | EXPORT_SYMBOL(agp_bind_memory); |
| 454 | |
| 455 | |
| 456 | /** |
| 457 | * agp_unbind_memory - Removes an agp_memory structure from the GATT |
| 458 | * |
| 459 | * @curr: agp_memory pointer to be removed from the GATT. |
| 460 | * |
| 461 | * It returns -EINVAL if this piece of agp_memory is not currently bound to |
| 462 | * the graphics aperture translation table or if the agp_memory pointer == NULL |
| 463 | */ |
| 464 | int agp_unbind_memory(struct agp_memory *curr) |
| 465 | { |
| 466 | int ret_val; |
| 467 | |
| 468 | if (curr == NULL) |
| 469 | return -EINVAL; |
| 470 | |
Joe Perches | c725801 | 2008-03-26 14:10:02 -0700 | [diff] [blame] | 471 | if (!curr->is_bound) { |
Dave Jones | 8c8b838 | 2005-08-17 23:08:11 -0700 | [diff] [blame] | 472 | printk(KERN_INFO PFX "memory %p was not bound!\n", curr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 473 | return -EINVAL; |
| 474 | } |
| 475 | |
| 476 | ret_val = curr->bridge->driver->remove_memory(curr, curr->pg_start, curr->type); |
| 477 | |
| 478 | if (ret_val != 0) |
| 479 | return ret_val; |
| 480 | |
Joe Perches | c725801 | 2008-03-26 14:10:02 -0700 | [diff] [blame] | 481 | curr->is_bound = false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 482 | curr->pg_start = 0; |
Keith Packard | a8c84df | 2008-07-31 15:48:07 +1000 | [diff] [blame] | 483 | spin_lock(&curr->bridge->mapped_lock); |
| 484 | list_del(&curr->mapped_list); |
| 485 | spin_unlock(&curr->bridge->mapped_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 486 | return 0; |
| 487 | } |
| 488 | EXPORT_SYMBOL(agp_unbind_memory); |
| 489 | |
Keith Packard | a8c84df | 2008-07-31 15:48:07 +1000 | [diff] [blame] | 490 | /** |
| 491 | * agp_rebind_emmory - Rewrite the entire GATT, useful on resume |
| 492 | */ |
| 493 | int agp_rebind_memory(void) |
| 494 | { |
| 495 | struct agp_memory *curr; |
| 496 | int ret_val = 0; |
| 497 | |
| 498 | spin_lock(&agp_bridge->mapped_lock); |
| 499 | list_for_each_entry(curr, &agp_bridge->mapped_list, mapped_list) { |
| 500 | ret_val = curr->bridge->driver->insert_memory(curr, |
| 501 | curr->pg_start, |
| 502 | curr->type); |
| 503 | if (ret_val != 0) |
| 504 | break; |
| 505 | } |
| 506 | spin_unlock(&agp_bridge->mapped_lock); |
| 507 | return ret_val; |
| 508 | } |
| 509 | EXPORT_SYMBOL(agp_rebind_memory); |
| 510 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 511 | /* End - Routines for handling swapping of agp_memory into the GATT */ |
| 512 | |
| 513 | |
| 514 | /* Generic Agp routines - Start */ |
| 515 | static void agp_v2_parse_one(u32 *requested_mode, u32 *bridge_agpstat, u32 *vga_agpstat) |
| 516 | { |
| 517 | u32 tmp; |
| 518 | |
| 519 | if (*requested_mode & AGP2_RESERVED_MASK) { |
Dave Jones | c4dd458 | 2005-11-04 15:18:56 -0800 | [diff] [blame] | 520 | printk(KERN_INFO PFX "reserved bits set (%x) in mode 0x%x. Fixed.\n", |
| 521 | *requested_mode & AGP2_RESERVED_MASK, *requested_mode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 522 | *requested_mode &= ~AGP2_RESERVED_MASK; |
| 523 | } |
| 524 | |
Dave Jones | 28af24b | 2006-11-03 15:13:27 -0500 | [diff] [blame] | 525 | /* |
| 526 | * Some dumb bridges are programmed to disobey the AGP2 spec. |
| 527 | * This is likely a BIOS misprogramming rather than poweron default, or |
| 528 | * it would be a lot more common. |
| 529 | * https://bugs.freedesktop.org/show_bug.cgi?id=8816 |
| 530 | * AGPv2 spec 6.1.9 states: |
| 531 | * The RATE field indicates the data transfer rates supported by this |
| 532 | * device. A.G.P. devices must report all that apply. |
| 533 | * Fix them up as best we can. |
| 534 | */ |
| 535 | switch (*bridge_agpstat & 7) { |
| 536 | case 4: |
| 537 | *bridge_agpstat |= (AGPSTAT2_2X | AGPSTAT2_1X); |
| 538 | printk(KERN_INFO PFX "BIOS bug. AGP bridge claims to only support x4 rate" |
| 539 | "Fixing up support for x2 & x1\n"); |
| 540 | break; |
| 541 | case 2: |
| 542 | *bridge_agpstat |= AGPSTAT2_1X; |
| 543 | printk(KERN_INFO PFX "BIOS bug. AGP bridge claims to only support x2 rate" |
| 544 | "Fixing up support for x1\n"); |
| 545 | break; |
| 546 | default: |
| 547 | break; |
| 548 | } |
| 549 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 550 | /* Check the speed bits make sense. Only one should be set. */ |
| 551 | tmp = *requested_mode & 7; |
| 552 | switch (tmp) { |
| 553 | case 0: |
Dave Jones | 8c8b838 | 2005-08-17 23:08:11 -0700 | [diff] [blame] | 554 | 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] | 555 | *requested_mode |= AGPSTAT2_1X; |
| 556 | break; |
| 557 | case 1: |
| 558 | case 2: |
| 559 | break; |
| 560 | case 3: |
| 561 | *requested_mode &= ~(AGPSTAT2_1X); /* rate=2 */ |
| 562 | break; |
| 563 | case 4: |
| 564 | break; |
| 565 | case 5: |
| 566 | case 6: |
| 567 | case 7: |
| 568 | *requested_mode &= ~(AGPSTAT2_1X|AGPSTAT2_2X); /* rate=4*/ |
| 569 | break; |
| 570 | } |
| 571 | |
| 572 | /* disable SBA if it's not supported */ |
| 573 | if (!((*bridge_agpstat & AGPSTAT_SBA) && (*vga_agpstat & AGPSTAT_SBA) && (*requested_mode & AGPSTAT_SBA))) |
| 574 | *bridge_agpstat &= ~AGPSTAT_SBA; |
| 575 | |
| 576 | /* Set rate */ |
| 577 | if (!((*bridge_agpstat & AGPSTAT2_4X) && (*vga_agpstat & AGPSTAT2_4X) && (*requested_mode & AGPSTAT2_4X))) |
| 578 | *bridge_agpstat &= ~AGPSTAT2_4X; |
| 579 | |
| 580 | if (!((*bridge_agpstat & AGPSTAT2_2X) && (*vga_agpstat & AGPSTAT2_2X) && (*requested_mode & AGPSTAT2_2X))) |
| 581 | *bridge_agpstat &= ~AGPSTAT2_2X; |
| 582 | |
| 583 | if (!((*bridge_agpstat & AGPSTAT2_1X) && (*vga_agpstat & AGPSTAT2_1X) && (*requested_mode & AGPSTAT2_1X))) |
| 584 | *bridge_agpstat &= ~AGPSTAT2_1X; |
| 585 | |
| 586 | /* Now we know what mode it should be, clear out the unwanted bits. */ |
| 587 | if (*bridge_agpstat & AGPSTAT2_4X) |
| 588 | *bridge_agpstat &= ~(AGPSTAT2_1X | AGPSTAT2_2X); /* 4X */ |
| 589 | |
| 590 | if (*bridge_agpstat & AGPSTAT2_2X) |
| 591 | *bridge_agpstat &= ~(AGPSTAT2_1X | AGPSTAT2_4X); /* 2X */ |
| 592 | |
| 593 | if (*bridge_agpstat & AGPSTAT2_1X) |
| 594 | *bridge_agpstat &= ~(AGPSTAT2_2X | AGPSTAT2_4X); /* 1X */ |
| 595 | |
| 596 | /* Apply any errata. */ |
| 597 | if (agp_bridge->flags & AGP_ERRATA_FASTWRITES) |
| 598 | *bridge_agpstat &= ~AGPSTAT_FW; |
| 599 | |
| 600 | if (agp_bridge->flags & AGP_ERRATA_SBA) |
| 601 | *bridge_agpstat &= ~AGPSTAT_SBA; |
| 602 | |
| 603 | if (agp_bridge->flags & AGP_ERRATA_1X) { |
| 604 | *bridge_agpstat &= ~(AGPSTAT2_2X | AGPSTAT2_4X); |
| 605 | *bridge_agpstat |= AGPSTAT2_1X; |
| 606 | } |
| 607 | |
| 608 | /* If we've dropped down to 1X, disable fast writes. */ |
| 609 | if (*bridge_agpstat & AGPSTAT2_1X) |
| 610 | *bridge_agpstat &= ~AGPSTAT_FW; |
| 611 | } |
| 612 | |
| 613 | /* |
| 614 | * requested_mode = Mode requested by (typically) X. |
| 615 | * bridge_agpstat = PCI_AGP_STATUS from agp bridge. |
| 616 | * vga_agpstat = PCI_AGP_STATUS from graphic card. |
| 617 | */ |
| 618 | static void agp_v3_parse_one(u32 *requested_mode, u32 *bridge_agpstat, u32 *vga_agpstat) |
| 619 | { |
| 620 | u32 origbridge=*bridge_agpstat, origvga=*vga_agpstat; |
| 621 | u32 tmp; |
| 622 | |
| 623 | if (*requested_mode & AGP3_RESERVED_MASK) { |
Dave Jones | c4dd458 | 2005-11-04 15:18:56 -0800 | [diff] [blame] | 624 | printk(KERN_INFO PFX "reserved bits set (%x) in mode 0x%x. Fixed.\n", |
| 625 | *requested_mode & AGP3_RESERVED_MASK, *requested_mode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 626 | *requested_mode &= ~AGP3_RESERVED_MASK; |
| 627 | } |
| 628 | |
| 629 | /* Check the speed bits make sense. */ |
| 630 | tmp = *requested_mode & 7; |
| 631 | if (tmp == 0) { |
Dave Jones | 8c8b838 | 2005-08-17 23:08:11 -0700 | [diff] [blame] | 632 | 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] | 633 | *requested_mode |= AGPSTAT3_4X; |
| 634 | } |
| 635 | if (tmp >= 3) { |
Dave Jones | 8c8b838 | 2005-08-17 23:08:11 -0700 | [diff] [blame] | 636 | 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] | 637 | *requested_mode = (*requested_mode & ~7) | AGPSTAT3_8X; |
| 638 | } |
| 639 | |
| 640 | /* ARQSZ - Set the value to the maximum one. |
| 641 | * Don't allow the mode register to override values. */ |
| 642 | *bridge_agpstat = ((*bridge_agpstat & ~AGPSTAT_ARQSZ) | |
| 643 | max_t(u32,(*bridge_agpstat & AGPSTAT_ARQSZ),(*vga_agpstat & AGPSTAT_ARQSZ))); |
| 644 | |
| 645 | /* Calibration cycle. |
| 646 | * Don't allow the mode register to override values. */ |
| 647 | *bridge_agpstat = ((*bridge_agpstat & ~AGPSTAT_CAL_MASK) | |
| 648 | min_t(u32,(*bridge_agpstat & AGPSTAT_CAL_MASK),(*vga_agpstat & AGPSTAT_CAL_MASK))); |
| 649 | |
| 650 | /* SBA *must* be supported for AGP v3 */ |
| 651 | *bridge_agpstat |= AGPSTAT_SBA; |
| 652 | |
| 653 | /* |
| 654 | * Set speed. |
| 655 | * Check for invalid speeds. This can happen when applications |
| 656 | * written before the AGP 3.0 standard pass AGP2.x modes to AGP3 hardware |
| 657 | */ |
| 658 | if (*requested_mode & AGPSTAT_MODE_3_0) { |
| 659 | /* |
| 660 | * Caller hasn't a clue what it is doing. Bridge is in 3.0 mode, |
| 661 | * have been passed a 3.0 mode, but with 2.x speed bits set. |
| 662 | * AGP2.x 4x -> AGP3.0 4x. |
| 663 | */ |
| 664 | if (*requested_mode & AGPSTAT2_4X) { |
Dave Jones | 8c8b838 | 2005-08-17 23:08:11 -0700 | [diff] [blame] | 665 | printk(KERN_INFO PFX "%s passes broken AGP3 flags (%x). Fixed.\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 666 | current->comm, *requested_mode); |
| 667 | *requested_mode &= ~AGPSTAT2_4X; |
| 668 | *requested_mode |= AGPSTAT3_4X; |
| 669 | } |
| 670 | } else { |
| 671 | /* |
| 672 | * The caller doesn't know what they are doing. We are in 3.0 mode, |
| 673 | * but have been passed an AGP 2.x mode. |
| 674 | * Convert AGP 1x,2x,4x -> AGP 3.0 4x. |
| 675 | */ |
Dave Jones | 8c8b838 | 2005-08-17 23:08:11 -0700 | [diff] [blame] | 676 | 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] | 677 | current->comm, *requested_mode); |
| 678 | *requested_mode &= ~(AGPSTAT2_4X | AGPSTAT2_2X | AGPSTAT2_1X); |
| 679 | *requested_mode |= AGPSTAT3_4X; |
| 680 | } |
| 681 | |
| 682 | if (*requested_mode & AGPSTAT3_8X) { |
| 683 | if (!(*bridge_agpstat & AGPSTAT3_8X)) { |
| 684 | *bridge_agpstat &= ~(AGPSTAT3_8X | AGPSTAT3_RSVD); |
| 685 | *bridge_agpstat |= AGPSTAT3_4X; |
Dave Jones | 8c8b838 | 2005-08-17 23:08:11 -0700 | [diff] [blame] | 686 | 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] | 687 | return; |
| 688 | } |
| 689 | if (!(*vga_agpstat & AGPSTAT3_8X)) { |
| 690 | *bridge_agpstat &= ~(AGPSTAT3_8X | AGPSTAT3_RSVD); |
| 691 | *bridge_agpstat |= AGPSTAT3_4X; |
Dave Jones | 8c8b838 | 2005-08-17 23:08:11 -0700 | [diff] [blame] | 692 | 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] | 693 | return; |
| 694 | } |
| 695 | /* All set, bridge & device can do AGP x8*/ |
| 696 | *bridge_agpstat &= ~(AGPSTAT3_4X | AGPSTAT3_RSVD); |
| 697 | goto done; |
| 698 | |
Dave Jones | edf03fb | 2006-09-10 21:12:20 -0400 | [diff] [blame] | 699 | } else if (*requested_mode & AGPSTAT3_4X) { |
| 700 | *bridge_agpstat &= ~(AGPSTAT3_8X | AGPSTAT3_RSVD); |
| 701 | *bridge_agpstat |= AGPSTAT3_4X; |
| 702 | goto done; |
| 703 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 704 | } else { |
| 705 | |
| 706 | /* |
Dave Jones | edf03fb | 2006-09-10 21:12:20 -0400 | [diff] [blame] | 707 | * If we didn't specify an AGP mode, we see if both |
| 708 | * the graphics card, and the bridge can do x8, and use if so. |
| 709 | * If not, we fall back to x4 mode. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 710 | */ |
Dave Jones | edf03fb | 2006-09-10 21:12:20 -0400 | [diff] [blame] | 711 | if ((*bridge_agpstat & AGPSTAT3_8X) && (*vga_agpstat & AGPSTAT3_8X)) { |
Dave Jones | 2cc1a41 | 2006-09-28 19:50:07 -0400 | [diff] [blame] | 712 | printk(KERN_INFO PFX "No AGP mode specified. Setting to highest mode " |
| 713 | "supported by bridge & card (x8).\n"); |
Dave Jones | edf03fb | 2006-09-10 21:12:20 -0400 | [diff] [blame] | 714 | *bridge_agpstat &= ~(AGPSTAT3_4X | AGPSTAT3_RSVD); |
| 715 | *vga_agpstat &= ~(AGPSTAT3_4X | AGPSTAT3_RSVD); |
| 716 | } else { |
| 717 | printk(KERN_INFO PFX "Fell back to AGPx4 mode because"); |
| 718 | if (!(*bridge_agpstat & AGPSTAT3_8X)) { |
Dave Jones | 2cc1a41 | 2006-09-28 19:50:07 -0400 | [diff] [blame] | 719 | printk(KERN_INFO PFX "bridge couldn't do x8. bridge_agpstat:%x (orig=%x)\n", |
| 720 | *bridge_agpstat, origbridge); |
Dave Jones | edf03fb | 2006-09-10 21:12:20 -0400 | [diff] [blame] | 721 | *bridge_agpstat &= ~(AGPSTAT3_8X | AGPSTAT3_RSVD); |
| 722 | *bridge_agpstat |= AGPSTAT3_4X; |
| 723 | } |
| 724 | if (!(*vga_agpstat & AGPSTAT3_8X)) { |
Dave Jones | 2cc1a41 | 2006-09-28 19:50:07 -0400 | [diff] [blame] | 725 | printk(KERN_INFO PFX "graphics card couldn't do x8. vga_agpstat:%x (orig=%x)\n", |
| 726 | *vga_agpstat, origvga); |
Dave Jones | edf03fb | 2006-09-10 21:12:20 -0400 | [diff] [blame] | 727 | *vga_agpstat &= ~(AGPSTAT3_8X | AGPSTAT3_RSVD); |
| 728 | *vga_agpstat |= AGPSTAT3_4X; |
| 729 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 730 | } |
| 731 | } |
| 732 | |
| 733 | done: |
| 734 | /* Apply any errata. */ |
| 735 | if (agp_bridge->flags & AGP_ERRATA_FASTWRITES) |
| 736 | *bridge_agpstat &= ~AGPSTAT_FW; |
| 737 | |
| 738 | if (agp_bridge->flags & AGP_ERRATA_SBA) |
| 739 | *bridge_agpstat &= ~AGPSTAT_SBA; |
| 740 | |
| 741 | if (agp_bridge->flags & AGP_ERRATA_1X) { |
| 742 | *bridge_agpstat &= ~(AGPSTAT2_2X | AGPSTAT2_4X); |
| 743 | *bridge_agpstat |= AGPSTAT2_1X; |
| 744 | } |
| 745 | } |
| 746 | |
| 747 | |
| 748 | /** |
| 749 | * agp_collect_device_status - determine correct agp_cmd from various agp_stat's |
| 750 | * @bridge: an agp_bridge_data struct allocated for the AGP host bridge. |
| 751 | * @requested_mode: requested agp_stat from userspace (Typically from X) |
| 752 | * @bridge_agpstat: current agp_stat from AGP bridge. |
| 753 | * |
| 754 | * This function will hunt for an AGP graphics card, and try to match |
| 755 | * the requested mode to the capabilities of both the bridge and the card. |
| 756 | */ |
| 757 | u32 agp_collect_device_status(struct agp_bridge_data *bridge, u32 requested_mode, u32 bridge_agpstat) |
| 758 | { |
| 759 | struct pci_dev *device = NULL; |
| 760 | u32 vga_agpstat; |
| 761 | u8 cap_ptr; |
| 762 | |
| 763 | for (;;) { |
| 764 | device = pci_get_class(PCI_CLASS_DISPLAY_VGA << 8, device); |
| 765 | if (!device) { |
Dave Jones | 8c8b838 | 2005-08-17 23:08:11 -0700 | [diff] [blame] | 766 | printk(KERN_INFO PFX "Couldn't find an AGP VGA controller.\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 767 | return 0; |
| 768 | } |
| 769 | cap_ptr = pci_find_capability(device, PCI_CAP_ID_AGP); |
| 770 | if (cap_ptr) |
| 771 | break; |
| 772 | } |
| 773 | |
| 774 | /* |
| 775 | * Ok, here we have a AGP device. Disable impossible |
| 776 | * settings, and adjust the readqueue to the minimum. |
| 777 | */ |
| 778 | pci_read_config_dword(device, cap_ptr+PCI_AGP_STATUS, &vga_agpstat); |
| 779 | |
| 780 | /* adjust RQ depth */ |
| 781 | bridge_agpstat = ((bridge_agpstat & ~AGPSTAT_RQ_DEPTH) | |
| 782 | min_t(u32, (requested_mode & AGPSTAT_RQ_DEPTH), |
| 783 | min_t(u32, (bridge_agpstat & AGPSTAT_RQ_DEPTH), (vga_agpstat & AGPSTAT_RQ_DEPTH)))); |
| 784 | |
| 785 | /* disable FW if it's not supported */ |
| 786 | if (!((bridge_agpstat & AGPSTAT_FW) && |
| 787 | (vga_agpstat & AGPSTAT_FW) && |
| 788 | (requested_mode & AGPSTAT_FW))) |
| 789 | bridge_agpstat &= ~AGPSTAT_FW; |
| 790 | |
| 791 | /* Check to see if we are operating in 3.0 mode */ |
David Mosberger | 66bb8bf | 2005-04-04 13:29:43 -0700 | [diff] [blame] | 792 | if (agp_bridge->mode & AGPSTAT_MODE_3_0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 793 | agp_v3_parse_one(&requested_mode, &bridge_agpstat, &vga_agpstat); |
| 794 | else |
| 795 | agp_v2_parse_one(&requested_mode, &bridge_agpstat, &vga_agpstat); |
| 796 | |
| 797 | pci_dev_put(device); |
| 798 | return bridge_agpstat; |
| 799 | } |
| 800 | EXPORT_SYMBOL(agp_collect_device_status); |
| 801 | |
| 802 | |
Joe Perches | c725801 | 2008-03-26 14:10:02 -0700 | [diff] [blame] | 803 | void agp_device_command(u32 bridge_agpstat, bool agp_v3) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 804 | { |
| 805 | struct pci_dev *device = NULL; |
| 806 | int mode; |
| 807 | |
| 808 | mode = bridge_agpstat & 0x7; |
| 809 | if (agp_v3) |
| 810 | mode *= 4; |
| 811 | |
| 812 | for_each_pci_dev(device) { |
| 813 | u8 agp = pci_find_capability(device, PCI_CAP_ID_AGP); |
| 814 | if (!agp) |
| 815 | continue; |
| 816 | |
Bjorn Helgaas | e3cf695 | 2008-07-30 12:26:51 -0700 | [diff] [blame] | 817 | dev_info(&device->dev, "putting AGP V%d device into %dx mode\n", |
| 818 | agp_v3 ? 3 : 2, mode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 819 | pci_write_config_dword(device, agp + PCI_AGP_COMMAND, bridge_agpstat); |
| 820 | } |
| 821 | } |
| 822 | EXPORT_SYMBOL(agp_device_command); |
| 823 | |
| 824 | |
| 825 | void get_agp_version(struct agp_bridge_data *bridge) |
| 826 | { |
| 827 | u32 ncapid; |
| 828 | |
| 829 | /* Exit early if already set by errata workarounds. */ |
| 830 | if (bridge->major_version != 0) |
| 831 | return; |
| 832 | |
| 833 | pci_read_config_dword(bridge->dev, bridge->capndx, &ncapid); |
| 834 | bridge->major_version = (ncapid >> AGP_MAJOR_VERSION_SHIFT) & 0xf; |
| 835 | bridge->minor_version = (ncapid >> AGP_MINOR_VERSION_SHIFT) & 0xf; |
| 836 | } |
| 837 | EXPORT_SYMBOL(get_agp_version); |
| 838 | |
| 839 | |
| 840 | void agp_generic_enable(struct agp_bridge_data *bridge, u32 requested_mode) |
| 841 | { |
| 842 | u32 bridge_agpstat, temp; |
| 843 | |
| 844 | get_agp_version(agp_bridge); |
| 845 | |
Bjorn Helgaas | e3cf695 | 2008-07-30 12:26:51 -0700 | [diff] [blame] | 846 | dev_info(&agp_bridge->dev->dev, "AGP %d.%d bridge\n", |
| 847 | agp_bridge->major_version, agp_bridge->minor_version); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 848 | |
| 849 | pci_read_config_dword(agp_bridge->dev, |
| 850 | agp_bridge->capndx + PCI_AGP_STATUS, &bridge_agpstat); |
| 851 | |
| 852 | bridge_agpstat = agp_collect_device_status(agp_bridge, requested_mode, bridge_agpstat); |
| 853 | if (bridge_agpstat == 0) |
| 854 | /* Something bad happened. FIXME: Return error code? */ |
| 855 | return; |
| 856 | |
| 857 | bridge_agpstat |= AGPSTAT_AGP_ENABLE; |
| 858 | |
| 859 | /* Do AGP version specific frobbing. */ |
| 860 | if (bridge->major_version >= 3) { |
David Mosberger | 66bb8bf | 2005-04-04 13:29:43 -0700 | [diff] [blame] | 861 | if (bridge->mode & AGPSTAT_MODE_3_0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 862 | /* If we have 3.5, we can do the isoch stuff. */ |
| 863 | if (bridge->minor_version >= 5) |
| 864 | agp_3_5_enable(bridge); |
Joe Perches | c725801 | 2008-03-26 14:10:02 -0700 | [diff] [blame] | 865 | agp_device_command(bridge_agpstat, true); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 866 | return; |
| 867 | } else { |
| 868 | /* Disable calibration cycle in RX91<1> when not in AGP3.0 mode of operation.*/ |
| 869 | bridge_agpstat &= ~(7<<10) ; |
| 870 | pci_read_config_dword(bridge->dev, |
| 871 | bridge->capndx+AGPCTRL, &temp); |
| 872 | temp |= (1<<9); |
| 873 | pci_write_config_dword(bridge->dev, |
| 874 | bridge->capndx+AGPCTRL, temp); |
| 875 | |
Bjorn Helgaas | e3cf695 | 2008-07-30 12:26:51 -0700 | [diff] [blame] | 876 | dev_info(&bridge->dev->dev, "bridge is in legacy mode, falling back to 2.x\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 877 | } |
| 878 | } |
| 879 | |
| 880 | /* AGP v<3 */ |
Joe Perches | c725801 | 2008-03-26 14:10:02 -0700 | [diff] [blame] | 881 | agp_device_command(bridge_agpstat, false); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 882 | } |
| 883 | EXPORT_SYMBOL(agp_generic_enable); |
| 884 | |
| 885 | |
| 886 | int agp_generic_create_gatt_table(struct agp_bridge_data *bridge) |
| 887 | { |
| 888 | char *table; |
| 889 | char *table_end; |
| 890 | int size; |
| 891 | int page_order; |
| 892 | int num_entries; |
| 893 | int i; |
| 894 | void *temp; |
| 895 | struct page *page; |
| 896 | |
| 897 | /* The generic routines can't handle 2 level gatt's */ |
| 898 | if (bridge->driver->size_type == LVL2_APER_SIZE) |
| 899 | return -EINVAL; |
| 900 | |
| 901 | table = NULL; |
| 902 | i = bridge->aperture_size_idx; |
| 903 | temp = bridge->current_size; |
| 904 | size = page_order = num_entries = 0; |
| 905 | |
| 906 | if (bridge->driver->size_type != FIXED_APER_SIZE) { |
| 907 | do { |
| 908 | switch (bridge->driver->size_type) { |
| 909 | case U8_APER_SIZE: |
| 910 | size = A_SIZE_8(temp)->size; |
| 911 | page_order = |
| 912 | A_SIZE_8(temp)->page_order; |
| 913 | num_entries = |
| 914 | A_SIZE_8(temp)->num_entries; |
| 915 | break; |
| 916 | case U16_APER_SIZE: |
| 917 | size = A_SIZE_16(temp)->size; |
| 918 | page_order = A_SIZE_16(temp)->page_order; |
| 919 | num_entries = A_SIZE_16(temp)->num_entries; |
| 920 | break; |
| 921 | case U32_APER_SIZE: |
| 922 | size = A_SIZE_32(temp)->size; |
| 923 | page_order = A_SIZE_32(temp)->page_order; |
| 924 | num_entries = A_SIZE_32(temp)->num_entries; |
| 925 | break; |
| 926 | /* This case will never really happen. */ |
| 927 | case FIXED_APER_SIZE: |
| 928 | case LVL2_APER_SIZE: |
| 929 | default: |
| 930 | size = page_order = num_entries = 0; |
| 931 | break; |
| 932 | } |
| 933 | |
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 | if (table == NULL) { |
| 937 | i++; |
| 938 | switch (bridge->driver->size_type) { |
| 939 | case U8_APER_SIZE: |
| 940 | bridge->current_size = A_IDX8(bridge); |
| 941 | break; |
| 942 | case U16_APER_SIZE: |
| 943 | bridge->current_size = A_IDX16(bridge); |
| 944 | break; |
| 945 | case U32_APER_SIZE: |
| 946 | bridge->current_size = A_IDX32(bridge); |
| 947 | break; |
Dave Jones | 89197e3 | 2006-05-30 18:19:39 -0400 | [diff] [blame] | 948 | /* These cases will never really happen. */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 949 | case FIXED_APER_SIZE: |
| 950 | case LVL2_APER_SIZE: |
| 951 | default: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 952 | break; |
| 953 | } |
| 954 | temp = bridge->current_size; |
| 955 | } else { |
| 956 | bridge->aperture_size_idx = i; |
| 957 | } |
| 958 | } while (!table && (i < bridge->driver->num_aperture_sizes)); |
| 959 | } else { |
| 960 | size = ((struct aper_size_info_fixed *) temp)->size; |
| 961 | page_order = ((struct aper_size_info_fixed *) temp)->page_order; |
| 962 | num_entries = ((struct aper_size_info_fixed *) temp)->num_entries; |
Keir Fraser | 07eee78 | 2005-03-30 13:17:04 -0800 | [diff] [blame] | 963 | table = alloc_gatt_pages(page_order); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 964 | } |
| 965 | |
| 966 | if (table == NULL) |
| 967 | return -ENOMEM; |
| 968 | |
| 969 | table_end = table + ((PAGE_SIZE * (1 << page_order)) - 1); |
| 970 | |
| 971 | for (page = virt_to_page(table); page <= virt_to_page(table_end); page++) |
| 972 | SetPageReserved(page); |
| 973 | |
| 974 | bridge->gatt_table_real = (u32 *) table; |
| 975 | agp_gatt_table = (void *)table; |
| 976 | |
| 977 | bridge->driver->cache_flush(); |
Arjan van dev Ven | fcea424 | 2008-02-06 05:16:00 +0100 | [diff] [blame] | 978 | #ifdef CONFIG_X86 |
| 979 | set_memory_uc((unsigned long)table, 1 << page_order); |
| 980 | bridge->gatt_table = (void *)table; |
| 981 | #else |
Keir Fraser | 07eee78 | 2005-03-30 13:17:04 -0800 | [diff] [blame] | 982 | bridge->gatt_table = ioremap_nocache(virt_to_gart(table), |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 983 | (PAGE_SIZE * (1 << page_order))); |
| 984 | bridge->driver->cache_flush(); |
Arjan van dev Ven | fcea424 | 2008-02-06 05:16:00 +0100 | [diff] [blame] | 985 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 986 | |
| 987 | if (bridge->gatt_table == NULL) { |
| 988 | for (page = virt_to_page(table); page <= virt_to_page(table_end); page++) |
| 989 | ClearPageReserved(page); |
| 990 | |
Keir Fraser | 07eee78 | 2005-03-30 13:17:04 -0800 | [diff] [blame] | 991 | free_gatt_pages(table, page_order); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 992 | |
| 993 | return -ENOMEM; |
| 994 | } |
Keir Fraser | 07eee78 | 2005-03-30 13:17:04 -0800 | [diff] [blame] | 995 | bridge->gatt_bus_addr = virt_to_gart(bridge->gatt_table_real); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 996 | |
| 997 | /* AK: bogus, should encode addresses > 4GB */ |
| 998 | for (i = 0; i < num_entries; i++) { |
| 999 | writel(bridge->scratch_page, bridge->gatt_table+i); |
| 1000 | readl(bridge->gatt_table+i); /* PCI Posting. */ |
| 1001 | } |
| 1002 | |
| 1003 | return 0; |
| 1004 | } |
| 1005 | EXPORT_SYMBOL(agp_generic_create_gatt_table); |
| 1006 | |
| 1007 | int agp_generic_free_gatt_table(struct agp_bridge_data *bridge) |
| 1008 | { |
| 1009 | int page_order; |
| 1010 | char *table, *table_end; |
| 1011 | void *temp; |
| 1012 | struct page *page; |
| 1013 | |
| 1014 | temp = bridge->current_size; |
| 1015 | |
| 1016 | switch (bridge->driver->size_type) { |
| 1017 | case U8_APER_SIZE: |
| 1018 | page_order = A_SIZE_8(temp)->page_order; |
| 1019 | break; |
| 1020 | case U16_APER_SIZE: |
| 1021 | page_order = A_SIZE_16(temp)->page_order; |
| 1022 | break; |
| 1023 | case U32_APER_SIZE: |
| 1024 | page_order = A_SIZE_32(temp)->page_order; |
| 1025 | break; |
| 1026 | case FIXED_APER_SIZE: |
| 1027 | page_order = A_SIZE_FIX(temp)->page_order; |
| 1028 | break; |
| 1029 | case LVL2_APER_SIZE: |
| 1030 | /* The generic routines can't deal with 2 level gatt's */ |
| 1031 | return -EINVAL; |
| 1032 | break; |
| 1033 | default: |
| 1034 | page_order = 0; |
| 1035 | break; |
| 1036 | } |
| 1037 | |
| 1038 | /* Do not worry about freeing memory, because if this is |
| 1039 | * called, then all agp memory is deallocated and removed |
| 1040 | * from the table. */ |
| 1041 | |
Arjan van dev Ven | fcea424 | 2008-02-06 05:16:00 +0100 | [diff] [blame] | 1042 | #ifdef CONFIG_X86 |
| 1043 | set_memory_wb((unsigned long)bridge->gatt_table, 1 << page_order); |
| 1044 | #else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1045 | iounmap(bridge->gatt_table); |
Arjan van dev Ven | fcea424 | 2008-02-06 05:16:00 +0100 | [diff] [blame] | 1046 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1047 | table = (char *) bridge->gatt_table_real; |
| 1048 | table_end = table + ((PAGE_SIZE * (1 << page_order)) - 1); |
| 1049 | |
| 1050 | for (page = virt_to_page(table); page <= virt_to_page(table_end); page++) |
| 1051 | ClearPageReserved(page); |
| 1052 | |
Keir Fraser | 07eee78 | 2005-03-30 13:17:04 -0800 | [diff] [blame] | 1053 | free_gatt_pages(bridge->gatt_table_real, page_order); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1054 | |
| 1055 | agp_gatt_table = NULL; |
| 1056 | bridge->gatt_table = NULL; |
| 1057 | bridge->gatt_table_real = NULL; |
| 1058 | bridge->gatt_bus_addr = 0; |
| 1059 | |
| 1060 | return 0; |
| 1061 | } |
| 1062 | EXPORT_SYMBOL(agp_generic_free_gatt_table); |
| 1063 | |
| 1064 | |
| 1065 | int agp_generic_insert_memory(struct agp_memory * mem, off_t pg_start, int type) |
| 1066 | { |
| 1067 | int num_entries; |
| 1068 | size_t i; |
| 1069 | off_t j; |
| 1070 | void *temp; |
| 1071 | struct agp_bridge_data *bridge; |
Thomas Hellstrom | a030ce4 | 2007-01-23 10:33:43 +0100 | [diff] [blame] | 1072 | int mask_type; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1073 | |
| 1074 | bridge = mem->bridge; |
| 1075 | if (!bridge) |
| 1076 | return -EINVAL; |
| 1077 | |
Thomas Hellstrom | 5aa80c7 | 2006-12-20 16:33:41 +0100 | [diff] [blame] | 1078 | if (mem->page_count == 0) |
| 1079 | return 0; |
| 1080 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1081 | temp = bridge->current_size; |
| 1082 | |
| 1083 | switch (bridge->driver->size_type) { |
| 1084 | case U8_APER_SIZE: |
| 1085 | num_entries = A_SIZE_8(temp)->num_entries; |
| 1086 | break; |
| 1087 | case U16_APER_SIZE: |
| 1088 | num_entries = A_SIZE_16(temp)->num_entries; |
| 1089 | break; |
| 1090 | case U32_APER_SIZE: |
| 1091 | num_entries = A_SIZE_32(temp)->num_entries; |
| 1092 | break; |
| 1093 | case FIXED_APER_SIZE: |
| 1094 | num_entries = A_SIZE_FIX(temp)->num_entries; |
| 1095 | break; |
| 1096 | case LVL2_APER_SIZE: |
| 1097 | /* The generic routines can't deal with 2 level gatt's */ |
| 1098 | return -EINVAL; |
| 1099 | break; |
| 1100 | default: |
| 1101 | num_entries = 0; |
| 1102 | break; |
| 1103 | } |
| 1104 | |
| 1105 | num_entries -= agp_memory_reserved/PAGE_SIZE; |
| 1106 | if (num_entries < 0) num_entries = 0; |
| 1107 | |
Andrew Morton | 1c14cfb | 2007-02-05 16:09:35 -0800 | [diff] [blame] | 1108 | if (type != mem->type) |
Thomas Hellstrom | a030ce4 | 2007-01-23 10:33:43 +0100 | [diff] [blame] | 1109 | return -EINVAL; |
Thomas Hellstrom | a030ce4 | 2007-01-23 10:33:43 +0100 | [diff] [blame] | 1110 | |
| 1111 | mask_type = bridge->driver->agp_type_to_mask_type(bridge, type); |
| 1112 | if (mask_type != 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1113 | /* The generic routines know nothing of memory types */ |
| 1114 | return -EINVAL; |
| 1115 | } |
| 1116 | |
| 1117 | /* AK: could wrap */ |
| 1118 | if ((pg_start + mem->page_count) > num_entries) |
| 1119 | return -EINVAL; |
| 1120 | |
| 1121 | j = pg_start; |
| 1122 | |
| 1123 | while (j < (pg_start + mem->page_count)) { |
| 1124 | if (!PGE_EMPTY(bridge, readl(bridge->gatt_table+j))) |
| 1125 | return -EBUSY; |
| 1126 | j++; |
| 1127 | } |
| 1128 | |
Joe Perches | c725801 | 2008-03-26 14:10:02 -0700 | [diff] [blame] | 1129 | if (!mem->is_flushed) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1130 | bridge->driver->cache_flush(); |
Joe Perches | c725801 | 2008-03-26 14:10:02 -0700 | [diff] [blame] | 1131 | mem->is_flushed = true; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1132 | } |
| 1133 | |
| 1134 | for (i = 0, j = pg_start; i < mem->page_count; i++, j++) { |
Dave Airlie | 07613ba | 2009-06-12 14:11:41 +1000 | [diff] [blame] | 1135 | writel(bridge->driver->mask_memory(bridge, mem->pages[i], mask_type), |
Thomas Hellstrom | a030ce4 | 2007-01-23 10:33:43 +0100 | [diff] [blame] | 1136 | bridge->gatt_table+j); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1137 | } |
Thomas Hellstrom | 5aa80c7 | 2006-12-20 16:33:41 +0100 | [diff] [blame] | 1138 | readl(bridge->gatt_table+j-1); /* PCI Posting. */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1139 | |
| 1140 | bridge->driver->tlb_flush(mem); |
| 1141 | return 0; |
| 1142 | } |
| 1143 | EXPORT_SYMBOL(agp_generic_insert_memory); |
| 1144 | |
| 1145 | |
| 1146 | int agp_generic_remove_memory(struct agp_memory *mem, off_t pg_start, int type) |
| 1147 | { |
| 1148 | size_t i; |
| 1149 | struct agp_bridge_data *bridge; |
Thomas Hellstrom | a030ce4 | 2007-01-23 10:33:43 +0100 | [diff] [blame] | 1150 | int mask_type; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1151 | |
| 1152 | bridge = mem->bridge; |
| 1153 | if (!bridge) |
| 1154 | return -EINVAL; |
| 1155 | |
Thomas Hellstrom | 5aa80c7 | 2006-12-20 16:33:41 +0100 | [diff] [blame] | 1156 | if (mem->page_count == 0) |
| 1157 | return 0; |
| 1158 | |
Thomas Hellstrom | a030ce4 | 2007-01-23 10:33:43 +0100 | [diff] [blame] | 1159 | if (type != mem->type) |
| 1160 | return -EINVAL; |
| 1161 | |
| 1162 | mask_type = bridge->driver->agp_type_to_mask_type(bridge, type); |
| 1163 | if (mask_type != 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1164 | /* The generic routines know nothing of memory types */ |
| 1165 | return -EINVAL; |
| 1166 | } |
| 1167 | |
| 1168 | /* AK: bogus, should encode addresses > 4GB */ |
| 1169 | for (i = pg_start; i < (mem->page_count + pg_start); i++) { |
| 1170 | writel(bridge->scratch_page, bridge->gatt_table+i); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1171 | } |
Thomas Hellstrom | 5aa80c7 | 2006-12-20 16:33:41 +0100 | [diff] [blame] | 1172 | readl(bridge->gatt_table+i-1); /* PCI Posting. */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1173 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1174 | bridge->driver->tlb_flush(mem); |
| 1175 | return 0; |
| 1176 | } |
| 1177 | EXPORT_SYMBOL(agp_generic_remove_memory); |
| 1178 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1179 | struct agp_memory *agp_generic_alloc_by_type(size_t page_count, int type) |
| 1180 | { |
| 1181 | return NULL; |
| 1182 | } |
| 1183 | EXPORT_SYMBOL(agp_generic_alloc_by_type); |
| 1184 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1185 | void agp_generic_free_by_type(struct agp_memory *curr) |
| 1186 | { |
Thomas Hellstrom | a030ce4 | 2007-01-23 10:33:43 +0100 | [diff] [blame] | 1187 | agp_free_page_array(curr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1188 | agp_free_key(curr->key); |
| 1189 | kfree(curr); |
| 1190 | } |
| 1191 | EXPORT_SYMBOL(agp_generic_free_by_type); |
| 1192 | |
Thomas Hellstrom | a030ce4 | 2007-01-23 10:33:43 +0100 | [diff] [blame] | 1193 | struct agp_memory *agp_generic_alloc_user(size_t page_count, int type) |
| 1194 | { |
| 1195 | struct agp_memory *new; |
| 1196 | int i; |
| 1197 | int pages; |
| 1198 | |
| 1199 | pages = (page_count + ENTRIES_PER_PAGE - 1) / ENTRIES_PER_PAGE; |
| 1200 | new = agp_create_user_memory(page_count); |
| 1201 | if (new == NULL) |
| 1202 | return NULL; |
| 1203 | |
Andrew Morton | 1c14cfb | 2007-02-05 16:09:35 -0800 | [diff] [blame] | 1204 | for (i = 0; i < page_count; i++) |
Dave Airlie | 07613ba | 2009-06-12 14:11:41 +1000 | [diff] [blame] | 1205 | new->pages[i] = 0; |
Thomas Hellstrom | a030ce4 | 2007-01-23 10:33:43 +0100 | [diff] [blame] | 1206 | new->page_count = 0; |
| 1207 | new->type = type; |
| 1208 | new->num_scratch_pages = pages; |
| 1209 | |
| 1210 | return new; |
| 1211 | } |
| 1212 | EXPORT_SYMBOL(agp_generic_alloc_user); |
| 1213 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1214 | /* |
| 1215 | * Basic Page Allocation Routines - |
| 1216 | * These routines handle page allocation and by default they reserve the allocated |
| 1217 | * memory. They also handle incrementing the current_memory_agp value, Which is checked |
| 1218 | * against a maximum value. |
| 1219 | */ |
| 1220 | |
Shaohua Li | 37acee1 | 2008-08-21 10:46:11 +0800 | [diff] [blame] | 1221 | int agp_generic_alloc_pages(struct agp_bridge_data *bridge, struct agp_memory *mem, size_t num_pages) |
| 1222 | { |
| 1223 | struct page * page; |
| 1224 | int i, ret = -ENOMEM; |
| 1225 | |
| 1226 | for (i = 0; i < num_pages; i++) { |
Shaohua Li | 59de2be | 2009-04-20 10:08:35 +1000 | [diff] [blame] | 1227 | page = alloc_page(GFP_KERNEL | GFP_DMA32 | __GFP_ZERO); |
Shaohua Li | 37acee1 | 2008-08-21 10:46:11 +0800 | [diff] [blame] | 1228 | /* agp_free_memory() needs gart address */ |
| 1229 | if (page == NULL) |
| 1230 | goto out; |
| 1231 | |
| 1232 | #ifndef CONFIG_X86 |
| 1233 | map_page_into_agp(page); |
| 1234 | #endif |
| 1235 | get_page(page); |
| 1236 | atomic_inc(&agp_bridge->current_memory_agp); |
| 1237 | |
Dave Airlie | 07613ba | 2009-06-12 14:11:41 +1000 | [diff] [blame] | 1238 | mem->pages[i] = page; |
Shaohua Li | 37acee1 | 2008-08-21 10:46:11 +0800 | [diff] [blame] | 1239 | mem->page_count++; |
| 1240 | } |
| 1241 | |
| 1242 | #ifdef CONFIG_X86 |
Dave Airlie | 07613ba | 2009-06-12 14:11:41 +1000 | [diff] [blame] | 1243 | set_pages_array_uc(mem->pages, num_pages); |
Shaohua Li | 37acee1 | 2008-08-21 10:46:11 +0800 | [diff] [blame] | 1244 | #endif |
| 1245 | ret = 0; |
| 1246 | out: |
Shaohua Li | 37acee1 | 2008-08-21 10:46:11 +0800 | [diff] [blame] | 1247 | return ret; |
| 1248 | } |
| 1249 | EXPORT_SYMBOL(agp_generic_alloc_pages); |
| 1250 | |
Dave Airlie | 07613ba | 2009-06-12 14:11:41 +1000 | [diff] [blame] | 1251 | struct page *agp_generic_alloc_page(struct agp_bridge_data *bridge) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1252 | { |
| 1253 | struct page * page; |
| 1254 | |
Shaohua Li | 59de2be | 2009-04-20 10:08:35 +1000 | [diff] [blame] | 1255 | page = alloc_page(GFP_KERNEL | GFP_DMA32 | __GFP_ZERO); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1256 | if (page == NULL) |
| 1257 | return NULL; |
| 1258 | |
Ingo Molnar | 9326d61 | 2008-08-21 13:46:25 +0200 | [diff] [blame] | 1259 | map_page_into_agp(page); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1260 | |
| 1261 | get_page(page); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1262 | atomic_inc(&agp_bridge->current_memory_agp); |
Dave Airlie | 07613ba | 2009-06-12 14:11:41 +1000 | [diff] [blame] | 1263 | return page; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1264 | } |
| 1265 | EXPORT_SYMBOL(agp_generic_alloc_page); |
| 1266 | |
Shaohua Li | bd07928 | 2008-08-21 10:46:17 +0800 | [diff] [blame] | 1267 | void agp_generic_destroy_pages(struct agp_memory *mem) |
| 1268 | { |
| 1269 | int i; |
Shaohua Li | bd07928 | 2008-08-21 10:46:17 +0800 | [diff] [blame] | 1270 | struct page *page; |
| 1271 | |
| 1272 | if (!mem) |
| 1273 | return; |
| 1274 | |
Shaohua Li | bd07928 | 2008-08-21 10:46:17 +0800 | [diff] [blame] | 1275 | #ifdef CONFIG_X86 |
Dave Airlie | 07613ba | 2009-06-12 14:11:41 +1000 | [diff] [blame] | 1276 | set_pages_array_wb(mem->pages, mem->page_count); |
Shaohua Li | bd07928 | 2008-08-21 10:46:17 +0800 | [diff] [blame] | 1277 | #endif |
| 1278 | |
| 1279 | for (i = 0; i < mem->page_count; i++) { |
Dave Airlie | 07613ba | 2009-06-12 14:11:41 +1000 | [diff] [blame] | 1280 | page = mem->pages[i]; |
Shaohua Li | bd07928 | 2008-08-21 10:46:17 +0800 | [diff] [blame] | 1281 | |
| 1282 | #ifndef CONFIG_X86 |
| 1283 | unmap_page_from_agp(page); |
| 1284 | #endif |
Shaohua Li | bd07928 | 2008-08-21 10:46:17 +0800 | [diff] [blame] | 1285 | put_page(page); |
Dave Airlie | 07613ba | 2009-06-12 14:11:41 +1000 | [diff] [blame] | 1286 | __free_page(page); |
Shaohua Li | bd07928 | 2008-08-21 10:46:17 +0800 | [diff] [blame] | 1287 | atomic_dec(&agp_bridge->current_memory_agp); |
Dave Airlie | 07613ba | 2009-06-12 14:11:41 +1000 | [diff] [blame] | 1288 | mem->pages[i] = NULL; |
Shaohua Li | bd07928 | 2008-08-21 10:46:17 +0800 | [diff] [blame] | 1289 | } |
| 1290 | } |
| 1291 | EXPORT_SYMBOL(agp_generic_destroy_pages); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1292 | |
Dave Airlie | 07613ba | 2009-06-12 14:11:41 +1000 | [diff] [blame] | 1293 | void agp_generic_destroy_page(struct page *page, int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1294 | { |
Dave Airlie | 07613ba | 2009-06-12 14:11:41 +1000 | [diff] [blame] | 1295 | if (page == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1296 | return; |
| 1297 | |
Dave Airlie | a2721e9 | 2007-10-15 10:19:16 +1000 | [diff] [blame] | 1298 | if (flags & AGP_PAGE_DESTROY_UNMAP) |
| 1299 | unmap_page_from_agp(page); |
| 1300 | |
| 1301 | if (flags & AGP_PAGE_DESTROY_FREE) { |
| 1302 | put_page(page); |
Dave Airlie | 07613ba | 2009-06-12 14:11:41 +1000 | [diff] [blame] | 1303 | __free_page(page); |
Dave Airlie | a2721e9 | 2007-10-15 10:19:16 +1000 | [diff] [blame] | 1304 | atomic_dec(&agp_bridge->current_memory_agp); |
| 1305 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1306 | } |
| 1307 | EXPORT_SYMBOL(agp_generic_destroy_page); |
| 1308 | |
| 1309 | /* End Basic Page Allocation Routines */ |
| 1310 | |
| 1311 | |
| 1312 | /** |
| 1313 | * agp_enable - initialise the agp point-to-point connection. |
| 1314 | * |
| 1315 | * @mode: agp mode register value to configure with. |
| 1316 | */ |
| 1317 | void agp_enable(struct agp_bridge_data *bridge, u32 mode) |
| 1318 | { |
| 1319 | if (!bridge) |
| 1320 | return; |
| 1321 | bridge->driver->agp_enable(bridge, mode); |
| 1322 | } |
| 1323 | EXPORT_SYMBOL(agp_enable); |
| 1324 | |
| 1325 | /* When we remove the global variable agp_bridge from all drivers |
| 1326 | * then agp_alloc_bridge and agp_generic_find_bridge need to be updated |
| 1327 | */ |
| 1328 | |
| 1329 | struct agp_bridge_data *agp_generic_find_bridge(struct pci_dev *pdev) |
| 1330 | { |
| 1331 | if (list_empty(&agp_bridges)) |
| 1332 | return NULL; |
| 1333 | |
| 1334 | return agp_bridge; |
| 1335 | } |
| 1336 | |
| 1337 | static void ipi_handler(void *null) |
| 1338 | { |
| 1339 | flush_agp_cache(); |
| 1340 | } |
| 1341 | |
| 1342 | void global_cache_flush(void) |
| 1343 | { |
Jens Axboe | 15c8b6c | 2008-05-09 09:39:44 +0200 | [diff] [blame] | 1344 | if (on_each_cpu(ipi_handler, NULL, 1) != 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1345 | panic(PFX "timed out waiting for the other CPUs!\n"); |
| 1346 | } |
| 1347 | EXPORT_SYMBOL(global_cache_flush); |
| 1348 | |
| 1349 | unsigned long agp_generic_mask_memory(struct agp_bridge_data *bridge, |
Dave Airlie | 07613ba | 2009-06-12 14:11:41 +1000 | [diff] [blame] | 1350 | struct page *page, int type) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1351 | { |
Dave Airlie | 07613ba | 2009-06-12 14:11:41 +1000 | [diff] [blame] | 1352 | unsigned long addr = phys_to_gart(page_to_phys(page)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1353 | /* memory type is ignored in the generic routine */ |
| 1354 | if (bridge->driver->masks) |
| 1355 | return addr | bridge->driver->masks[0].mask; |
| 1356 | else |
| 1357 | return addr; |
| 1358 | } |
| 1359 | EXPORT_SYMBOL(agp_generic_mask_memory); |
| 1360 | |
Thomas Hellstrom | a030ce4 | 2007-01-23 10:33:43 +0100 | [diff] [blame] | 1361 | int agp_generic_type_to_mask_type(struct agp_bridge_data *bridge, |
| 1362 | int type) |
| 1363 | { |
| 1364 | if (type >= AGP_USER_TYPES) |
| 1365 | return 0; |
| 1366 | return type; |
| 1367 | } |
| 1368 | EXPORT_SYMBOL(agp_generic_type_to_mask_type); |
| 1369 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1370 | /* |
| 1371 | * These functions are implemented according to the AGPv3 spec, |
| 1372 | * which covers implementation details that had previously been |
| 1373 | * left open. |
| 1374 | */ |
| 1375 | |
| 1376 | int agp3_generic_fetch_size(void) |
| 1377 | { |
| 1378 | u16 temp_size; |
| 1379 | int i; |
| 1380 | struct aper_size_info_16 *values; |
| 1381 | |
| 1382 | pci_read_config_word(agp_bridge->dev, agp_bridge->capndx+AGPAPSIZE, &temp_size); |
| 1383 | values = A_SIZE_16(agp_bridge->driver->aperture_sizes); |
| 1384 | |
| 1385 | for (i = 0; i < agp_bridge->driver->num_aperture_sizes; i++) { |
| 1386 | if (temp_size == values[i].size_value) { |
| 1387 | agp_bridge->previous_size = |
| 1388 | agp_bridge->current_size = (void *) (values + i); |
| 1389 | |
| 1390 | agp_bridge->aperture_size_idx = i; |
| 1391 | return values[i].size; |
| 1392 | } |
| 1393 | } |
| 1394 | return 0; |
| 1395 | } |
| 1396 | EXPORT_SYMBOL(agp3_generic_fetch_size); |
| 1397 | |
| 1398 | void agp3_generic_tlbflush(struct agp_memory *mem) |
| 1399 | { |
| 1400 | u32 ctrl; |
| 1401 | pci_read_config_dword(agp_bridge->dev, agp_bridge->capndx+AGPCTRL, &ctrl); |
| 1402 | pci_write_config_dword(agp_bridge->dev, agp_bridge->capndx+AGPCTRL, ctrl & ~AGPCTRL_GTLBEN); |
| 1403 | pci_write_config_dword(agp_bridge->dev, agp_bridge->capndx+AGPCTRL, ctrl); |
| 1404 | } |
| 1405 | EXPORT_SYMBOL(agp3_generic_tlbflush); |
| 1406 | |
| 1407 | int agp3_generic_configure(void) |
| 1408 | { |
| 1409 | u32 temp; |
| 1410 | struct aper_size_info_16 *current_size; |
| 1411 | |
| 1412 | current_size = A_SIZE_16(agp_bridge->current_size); |
| 1413 | |
| 1414 | pci_read_config_dword(agp_bridge->dev, AGP_APBASE, &temp); |
| 1415 | agp_bridge->gart_bus_addr = (temp & PCI_BASE_ADDRESS_MEM_MASK); |
| 1416 | |
| 1417 | /* set aperture size */ |
| 1418 | pci_write_config_word(agp_bridge->dev, agp_bridge->capndx+AGPAPSIZE, current_size->size_value); |
| 1419 | /* set gart pointer */ |
| 1420 | pci_write_config_dword(agp_bridge->dev, agp_bridge->capndx+AGPGARTLO, agp_bridge->gatt_bus_addr); |
| 1421 | /* enable aperture and GTLB */ |
| 1422 | pci_read_config_dword(agp_bridge->dev, agp_bridge->capndx+AGPCTRL, &temp); |
| 1423 | pci_write_config_dword(agp_bridge->dev, agp_bridge->capndx+AGPCTRL, temp | AGPCTRL_APERENB | AGPCTRL_GTLBEN); |
| 1424 | return 0; |
| 1425 | } |
| 1426 | EXPORT_SYMBOL(agp3_generic_configure); |
| 1427 | |
| 1428 | void agp3_generic_cleanup(void) |
| 1429 | { |
| 1430 | u32 ctrl; |
| 1431 | pci_read_config_dword(agp_bridge->dev, agp_bridge->capndx+AGPCTRL, &ctrl); |
| 1432 | pci_write_config_dword(agp_bridge->dev, agp_bridge->capndx+AGPCTRL, ctrl & ~AGPCTRL_APERENB); |
| 1433 | } |
| 1434 | EXPORT_SYMBOL(agp3_generic_cleanup); |
| 1435 | |
Dave Jones | e5524f3 | 2007-02-22 18:41:28 -0500 | [diff] [blame] | 1436 | const struct aper_size_info_16 agp3_generic_sizes[AGP_GENERIC_SIZES_ENTRIES] = |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1437 | { |
| 1438 | {4096, 1048576, 10,0x000}, |
| 1439 | {2048, 524288, 9, 0x800}, |
| 1440 | {1024, 262144, 8, 0xc00}, |
| 1441 | { 512, 131072, 7, 0xe00}, |
| 1442 | { 256, 65536, 6, 0xf00}, |
| 1443 | { 128, 32768, 5, 0xf20}, |
| 1444 | { 64, 16384, 4, 0xf30}, |
| 1445 | { 32, 8192, 3, 0xf38}, |
| 1446 | { 16, 4096, 2, 0xf3c}, |
| 1447 | { 8, 2048, 1, 0xf3e}, |
| 1448 | { 4, 1024, 0, 0xf3f} |
| 1449 | }; |
| 1450 | EXPORT_SYMBOL(agp3_generic_sizes); |
| 1451 | |