Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * AGPGART driver frontend |
| 3 | * Copyright (C) 2004 Silicon Graphics, Inc. |
| 4 | * Copyright (C) 2002-2003 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 | */ |
| 28 | |
| 29 | #include <linux/types.h> |
| 30 | #include <linux/kernel.h> |
| 31 | #include <linux/module.h> |
| 32 | #include <linux/mman.h> |
| 33 | #include <linux/pci.h> |
| 34 | #include <linux/init.h> |
| 35 | #include <linux/miscdevice.h> |
| 36 | #include <linux/agp_backend.h> |
| 37 | #include <linux/agpgart.h> |
| 38 | #include <linux/slab.h> |
| 39 | #include <linux/mm.h> |
Alexey Dobriyan | 4e950f6 | 2007-07-30 02:36:13 +0400 | [diff] [blame] | 40 | #include <linux/fs.h> |
Alexey Dobriyan | e8edc6e | 2007-05-21 01:22:52 +0400 | [diff] [blame] | 41 | #include <linux/sched.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 42 | #include <asm/uaccess.h> |
| 43 | #include <asm/pgtable.h> |
| 44 | #include "agp.h" |
| 45 | |
Zwane Mwaikambo | 0316fe8 | 2007-01-29 21:20:31 -0800 | [diff] [blame] | 46 | struct agp_front_data agp_fe; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 47 | |
Zwane Mwaikambo | 0316fe8 | 2007-01-29 21:20:31 -0800 | [diff] [blame] | 48 | struct agp_memory *agp_find_mem_by_key(int key) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 49 | { |
| 50 | struct agp_memory *curr; |
| 51 | |
| 52 | if (agp_fe.current_controller == NULL) |
| 53 | return NULL; |
| 54 | |
| 55 | curr = agp_fe.current_controller->pool; |
| 56 | |
| 57 | while (curr != NULL) { |
| 58 | if (curr->key == key) |
| 59 | break; |
| 60 | curr = curr->next; |
| 61 | } |
| 62 | |
| 63 | DBG("key=%d -> mem=%p", key, curr); |
| 64 | return curr; |
| 65 | } |
| 66 | |
| 67 | static void agp_remove_from_pool(struct agp_memory *temp) |
| 68 | { |
| 69 | struct agp_memory *prev; |
| 70 | struct agp_memory *next; |
| 71 | |
| 72 | /* Check to see if this is even in the memory pool */ |
| 73 | |
| 74 | DBG("mem=%p", temp); |
| 75 | if (agp_find_mem_by_key(temp->key) != NULL) { |
| 76 | next = temp->next; |
| 77 | prev = temp->prev; |
| 78 | |
| 79 | if (prev != NULL) { |
| 80 | prev->next = next; |
| 81 | if (next != NULL) |
| 82 | next->prev = prev; |
| 83 | |
| 84 | } else { |
| 85 | /* This is the first item on the list */ |
| 86 | if (next != NULL) |
| 87 | next->prev = NULL; |
| 88 | |
| 89 | agp_fe.current_controller->pool = next; |
| 90 | } |
| 91 | } |
| 92 | } |
| 93 | |
| 94 | /* |
| 95 | * Routines for managing each client's segment list - |
| 96 | * These routines handle adding and removing segments |
| 97 | * to each auth'ed client. |
| 98 | */ |
| 99 | |
| 100 | static struct |
| 101 | agp_segment_priv *agp_find_seg_in_client(const struct agp_client *client, |
| 102 | unsigned long offset, |
| 103 | int size, pgprot_t page_prot) |
| 104 | { |
| 105 | struct agp_segment_priv *seg; |
| 106 | int num_segments, i; |
| 107 | off_t pg_start; |
| 108 | size_t pg_count; |
| 109 | |
| 110 | pg_start = offset / 4096; |
| 111 | pg_count = size / 4096; |
| 112 | seg = *(client->segments); |
| 113 | num_segments = client->num_segments; |
| 114 | |
| 115 | for (i = 0; i < client->num_segments; i++) { |
| 116 | if ((seg[i].pg_start == pg_start) && |
| 117 | (seg[i].pg_count == pg_count) && |
| 118 | (pgprot_val(seg[i].prot) == pgprot_val(page_prot))) { |
| 119 | return seg + i; |
| 120 | } |
| 121 | } |
| 122 | |
| 123 | return NULL; |
| 124 | } |
| 125 | |
| 126 | static void agp_remove_seg_from_client(struct agp_client *client) |
| 127 | { |
| 128 | DBG("client=%p", client); |
| 129 | |
| 130 | if (client->segments != NULL) { |
| 131 | if (*(client->segments) != NULL) { |
| 132 | DBG("Freeing %p from client %p", *(client->segments), client); |
| 133 | kfree(*(client->segments)); |
| 134 | } |
| 135 | DBG("Freeing %p from client %p", client->segments, client); |
| 136 | kfree(client->segments); |
| 137 | client->segments = NULL; |
| 138 | } |
| 139 | } |
| 140 | |
| 141 | static void agp_add_seg_to_client(struct agp_client *client, |
| 142 | struct agp_segment_priv ** seg, int num_segments) |
| 143 | { |
| 144 | struct agp_segment_priv **prev_seg; |
| 145 | |
| 146 | prev_seg = client->segments; |
| 147 | |
| 148 | if (prev_seg != NULL) |
| 149 | agp_remove_seg_from_client(client); |
| 150 | |
| 151 | DBG("Adding seg %p (%d segments) to client %p", seg, num_segments, client); |
| 152 | client->num_segments = num_segments; |
| 153 | client->segments = seg; |
| 154 | } |
| 155 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 156 | static pgprot_t agp_convert_mmap_flags(int prot) |
| 157 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 158 | unsigned long prot_bits; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 159 | |
Hugh Dickins | 804af2c | 2006-07-26 21:39:49 +0100 | [diff] [blame] | 160 | prot_bits = calc_vm_prot_bits(prot) | VM_SHARED; |
| 161 | return vm_get_page_prot(prot_bits); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 162 | } |
| 163 | |
Zwane Mwaikambo | 0316fe8 | 2007-01-29 21:20:31 -0800 | [diff] [blame] | 164 | int agp_create_segment(struct agp_client *client, struct agp_region *region) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 165 | { |
| 166 | struct agp_segment_priv **ret_seg; |
| 167 | struct agp_segment_priv *seg; |
| 168 | struct agp_segment *user_seg; |
| 169 | size_t i; |
| 170 | |
Dave Jones | 0ea27d9 | 2005-10-20 15:12:16 -0700 | [diff] [blame] | 171 | seg = kzalloc((sizeof(struct agp_segment_priv) * region->seg_count), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 172 | if (seg == NULL) { |
| 173 | kfree(region->seg_list); |
| 174 | region->seg_list = NULL; |
| 175 | return -ENOMEM; |
| 176 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 177 | user_seg = region->seg_list; |
| 178 | |
| 179 | for (i = 0; i < region->seg_count; i++) { |
| 180 | seg[i].pg_start = user_seg[i].pg_start; |
| 181 | seg[i].pg_count = user_seg[i].pg_count; |
| 182 | seg[i].prot = agp_convert_mmap_flags(user_seg[i].prot); |
| 183 | } |
| 184 | kfree(region->seg_list); |
| 185 | region->seg_list = NULL; |
| 186 | |
| 187 | ret_seg = kmalloc(sizeof(void *), GFP_KERNEL); |
| 188 | if (ret_seg == NULL) { |
| 189 | kfree(seg); |
| 190 | return -ENOMEM; |
| 191 | } |
| 192 | *ret_seg = seg; |
| 193 | agp_add_seg_to_client(client, ret_seg, region->seg_count); |
| 194 | return 0; |
| 195 | } |
| 196 | |
| 197 | /* End - Routines for managing each client's segment list */ |
| 198 | |
| 199 | /* This function must only be called when current_controller != NULL */ |
| 200 | static void agp_insert_into_pool(struct agp_memory * temp) |
| 201 | { |
| 202 | struct agp_memory *prev; |
| 203 | |
| 204 | prev = agp_fe.current_controller->pool; |
| 205 | |
| 206 | if (prev != NULL) { |
| 207 | prev->prev = temp; |
| 208 | temp->next = prev; |
| 209 | } |
| 210 | agp_fe.current_controller->pool = temp; |
| 211 | } |
| 212 | |
| 213 | |
| 214 | /* File private list routines */ |
| 215 | |
Zwane Mwaikambo | 0316fe8 | 2007-01-29 21:20:31 -0800 | [diff] [blame] | 216 | struct agp_file_private *agp_find_private(pid_t pid) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 217 | { |
| 218 | struct agp_file_private *curr; |
| 219 | |
| 220 | curr = agp_fe.file_priv_list; |
| 221 | |
| 222 | while (curr != NULL) { |
| 223 | if (curr->my_pid == pid) |
| 224 | return curr; |
| 225 | curr = curr->next; |
| 226 | } |
| 227 | |
| 228 | return NULL; |
| 229 | } |
| 230 | |
Adrian Bunk | 408b664 | 2005-05-01 08:59:29 -0700 | [diff] [blame] | 231 | static void agp_insert_file_private(struct agp_file_private * priv) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 232 | { |
| 233 | struct agp_file_private *prev; |
| 234 | |
| 235 | prev = agp_fe.file_priv_list; |
| 236 | |
| 237 | if (prev != NULL) |
| 238 | prev->prev = priv; |
| 239 | priv->next = prev; |
| 240 | agp_fe.file_priv_list = priv; |
| 241 | } |
| 242 | |
Adrian Bunk | 408b664 | 2005-05-01 08:59:29 -0700 | [diff] [blame] | 243 | static void agp_remove_file_private(struct agp_file_private * priv) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 244 | { |
| 245 | struct agp_file_private *next; |
| 246 | struct agp_file_private *prev; |
| 247 | |
| 248 | next = priv->next; |
| 249 | prev = priv->prev; |
| 250 | |
| 251 | if (prev != NULL) { |
| 252 | prev->next = next; |
| 253 | |
| 254 | if (next != NULL) |
| 255 | next->prev = prev; |
| 256 | |
| 257 | } else { |
| 258 | if (next != NULL) |
| 259 | next->prev = NULL; |
| 260 | |
| 261 | agp_fe.file_priv_list = next; |
| 262 | } |
| 263 | } |
| 264 | |
| 265 | /* End - File flag list routines */ |
| 266 | |
| 267 | /* |
| 268 | * Wrappers for agp_free_memory & agp_allocate_memory |
| 269 | * These make sure that internal lists are kept updated. |
| 270 | */ |
Zwane Mwaikambo | 0316fe8 | 2007-01-29 21:20:31 -0800 | [diff] [blame] | 271 | void agp_free_memory_wrap(struct agp_memory *memory) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 272 | { |
| 273 | agp_remove_from_pool(memory); |
| 274 | agp_free_memory(memory); |
| 275 | } |
| 276 | |
Zwane Mwaikambo | 0316fe8 | 2007-01-29 21:20:31 -0800 | [diff] [blame] | 277 | struct agp_memory *agp_allocate_memory_wrap(size_t pg_count, u32 type) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 278 | { |
| 279 | struct agp_memory *memory; |
| 280 | |
| 281 | memory = agp_allocate_memory(agp_bridge, pg_count, type); |
| 282 | if (memory == NULL) |
| 283 | return NULL; |
| 284 | |
| 285 | agp_insert_into_pool(memory); |
| 286 | return memory; |
| 287 | } |
| 288 | |
| 289 | /* Routines for managing the list of controllers - |
| 290 | * These routines manage the current controller, and the list of |
| 291 | * controllers |
| 292 | */ |
| 293 | |
| 294 | static struct agp_controller *agp_find_controller_by_pid(pid_t id) |
| 295 | { |
| 296 | struct agp_controller *controller; |
| 297 | |
| 298 | controller = agp_fe.controllers; |
| 299 | |
| 300 | while (controller != NULL) { |
| 301 | if (controller->pid == id) |
| 302 | return controller; |
| 303 | controller = controller->next; |
| 304 | } |
| 305 | |
| 306 | return NULL; |
| 307 | } |
| 308 | |
| 309 | static struct agp_controller *agp_create_controller(pid_t id) |
| 310 | { |
| 311 | struct agp_controller *controller; |
| 312 | |
Dave Jones | 0ea27d9 | 2005-10-20 15:12:16 -0700 | [diff] [blame] | 313 | controller = kzalloc(sizeof(struct agp_controller), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 314 | if (controller == NULL) |
| 315 | return NULL; |
| 316 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 317 | controller->pid = id; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 318 | return controller; |
| 319 | } |
| 320 | |
| 321 | static int agp_insert_controller(struct agp_controller *controller) |
| 322 | { |
| 323 | struct agp_controller *prev_controller; |
| 324 | |
| 325 | prev_controller = agp_fe.controllers; |
| 326 | controller->next = prev_controller; |
| 327 | |
| 328 | if (prev_controller != NULL) |
| 329 | prev_controller->prev = controller; |
| 330 | |
| 331 | agp_fe.controllers = controller; |
| 332 | |
| 333 | return 0; |
| 334 | } |
| 335 | |
| 336 | static void agp_remove_all_clients(struct agp_controller *controller) |
| 337 | { |
| 338 | struct agp_client *client; |
| 339 | struct agp_client *temp; |
| 340 | |
| 341 | client = controller->clients; |
| 342 | |
| 343 | while (client) { |
| 344 | struct agp_file_private *priv; |
| 345 | |
| 346 | temp = client; |
| 347 | agp_remove_seg_from_client(temp); |
| 348 | priv = agp_find_private(temp->pid); |
| 349 | |
| 350 | if (priv != NULL) { |
| 351 | clear_bit(AGP_FF_IS_VALID, &priv->access_flags); |
| 352 | clear_bit(AGP_FF_IS_CLIENT, &priv->access_flags); |
| 353 | } |
| 354 | client = client->next; |
| 355 | kfree(temp); |
| 356 | } |
| 357 | } |
| 358 | |
| 359 | static void agp_remove_all_memory(struct agp_controller *controller) |
| 360 | { |
| 361 | struct agp_memory *memory; |
| 362 | struct agp_memory *temp; |
| 363 | |
| 364 | memory = controller->pool; |
| 365 | |
| 366 | while (memory) { |
| 367 | temp = memory; |
| 368 | memory = memory->next; |
| 369 | agp_free_memory_wrap(temp); |
| 370 | } |
| 371 | } |
| 372 | |
| 373 | static int agp_remove_controller(struct agp_controller *controller) |
| 374 | { |
| 375 | struct agp_controller *prev_controller; |
| 376 | struct agp_controller *next_controller; |
| 377 | |
| 378 | prev_controller = controller->prev; |
| 379 | next_controller = controller->next; |
| 380 | |
| 381 | if (prev_controller != NULL) { |
| 382 | prev_controller->next = next_controller; |
| 383 | if (next_controller != NULL) |
| 384 | next_controller->prev = prev_controller; |
| 385 | |
| 386 | } else { |
| 387 | if (next_controller != NULL) |
| 388 | next_controller->prev = NULL; |
| 389 | |
| 390 | agp_fe.controllers = next_controller; |
| 391 | } |
| 392 | |
| 393 | agp_remove_all_memory(controller); |
| 394 | agp_remove_all_clients(controller); |
| 395 | |
| 396 | if (agp_fe.current_controller == controller) { |
| 397 | agp_fe.current_controller = NULL; |
| 398 | agp_fe.backend_acquired = FALSE; |
| 399 | agp_backend_release(agp_bridge); |
| 400 | } |
| 401 | kfree(controller); |
| 402 | return 0; |
| 403 | } |
| 404 | |
| 405 | static void agp_controller_make_current(struct agp_controller *controller) |
| 406 | { |
| 407 | struct agp_client *clients; |
| 408 | |
| 409 | clients = controller->clients; |
| 410 | |
| 411 | while (clients != NULL) { |
| 412 | struct agp_file_private *priv; |
| 413 | |
| 414 | priv = agp_find_private(clients->pid); |
| 415 | |
| 416 | if (priv != NULL) { |
| 417 | set_bit(AGP_FF_IS_VALID, &priv->access_flags); |
| 418 | set_bit(AGP_FF_IS_CLIENT, &priv->access_flags); |
| 419 | } |
| 420 | clients = clients->next; |
| 421 | } |
| 422 | |
| 423 | agp_fe.current_controller = controller; |
| 424 | } |
| 425 | |
| 426 | static void agp_controller_release_current(struct agp_controller *controller, |
| 427 | struct agp_file_private *controller_priv) |
| 428 | { |
| 429 | struct agp_client *clients; |
| 430 | |
| 431 | clear_bit(AGP_FF_IS_VALID, &controller_priv->access_flags); |
| 432 | clients = controller->clients; |
| 433 | |
| 434 | while (clients != NULL) { |
| 435 | struct agp_file_private *priv; |
| 436 | |
| 437 | priv = agp_find_private(clients->pid); |
| 438 | |
| 439 | if (priv != NULL) |
| 440 | clear_bit(AGP_FF_IS_VALID, &priv->access_flags); |
| 441 | |
| 442 | clients = clients->next; |
| 443 | } |
| 444 | |
| 445 | agp_fe.current_controller = NULL; |
| 446 | agp_fe.used_by_controller = FALSE; |
| 447 | agp_backend_release(agp_bridge); |
| 448 | } |
| 449 | |
| 450 | /* |
| 451 | * Routines for managing client lists - |
| 452 | * These routines are for managing the list of auth'ed clients. |
| 453 | */ |
| 454 | |
| 455 | static struct agp_client |
| 456 | *agp_find_client_in_controller(struct agp_controller *controller, pid_t id) |
| 457 | { |
| 458 | struct agp_client *client; |
| 459 | |
| 460 | if (controller == NULL) |
| 461 | return NULL; |
| 462 | |
| 463 | client = controller->clients; |
| 464 | |
| 465 | while (client != NULL) { |
| 466 | if (client->pid == id) |
| 467 | return client; |
| 468 | client = client->next; |
| 469 | } |
| 470 | |
| 471 | return NULL; |
| 472 | } |
| 473 | |
| 474 | static struct agp_controller *agp_find_controller_for_client(pid_t id) |
| 475 | { |
| 476 | struct agp_controller *controller; |
| 477 | |
| 478 | controller = agp_fe.controllers; |
| 479 | |
| 480 | while (controller != NULL) { |
| 481 | if ((agp_find_client_in_controller(controller, id)) != NULL) |
| 482 | return controller; |
| 483 | controller = controller->next; |
| 484 | } |
| 485 | |
| 486 | return NULL; |
| 487 | } |
| 488 | |
Zwane Mwaikambo | 0316fe8 | 2007-01-29 21:20:31 -0800 | [diff] [blame] | 489 | struct agp_client *agp_find_client_by_pid(pid_t id) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 490 | { |
| 491 | struct agp_client *temp; |
| 492 | |
| 493 | if (agp_fe.current_controller == NULL) |
| 494 | return NULL; |
| 495 | |
| 496 | temp = agp_find_client_in_controller(agp_fe.current_controller, id); |
| 497 | return temp; |
| 498 | } |
| 499 | |
| 500 | static void agp_insert_client(struct agp_client *client) |
| 501 | { |
| 502 | struct agp_client *prev_client; |
| 503 | |
| 504 | prev_client = agp_fe.current_controller->clients; |
| 505 | client->next = prev_client; |
| 506 | |
| 507 | if (prev_client != NULL) |
| 508 | prev_client->prev = client; |
| 509 | |
| 510 | agp_fe.current_controller->clients = client; |
| 511 | agp_fe.current_controller->num_clients++; |
| 512 | } |
| 513 | |
Zwane Mwaikambo | 0316fe8 | 2007-01-29 21:20:31 -0800 | [diff] [blame] | 514 | struct agp_client *agp_create_client(pid_t id) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 515 | { |
| 516 | struct agp_client *new_client; |
| 517 | |
Dave Jones | 0ea27d9 | 2005-10-20 15:12:16 -0700 | [diff] [blame] | 518 | new_client = kzalloc(sizeof(struct agp_client), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 519 | if (new_client == NULL) |
| 520 | return NULL; |
| 521 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 522 | new_client->pid = id; |
| 523 | agp_insert_client(new_client); |
| 524 | return new_client; |
| 525 | } |
| 526 | |
Zwane Mwaikambo | 0316fe8 | 2007-01-29 21:20:31 -0800 | [diff] [blame] | 527 | int agp_remove_client(pid_t id) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 528 | { |
| 529 | struct agp_client *client; |
| 530 | struct agp_client *prev_client; |
| 531 | struct agp_client *next_client; |
| 532 | struct agp_controller *controller; |
| 533 | |
| 534 | controller = agp_find_controller_for_client(id); |
| 535 | if (controller == NULL) |
| 536 | return -EINVAL; |
| 537 | |
| 538 | client = agp_find_client_in_controller(controller, id); |
| 539 | if (client == NULL) |
| 540 | return -EINVAL; |
| 541 | |
| 542 | prev_client = client->prev; |
| 543 | next_client = client->next; |
| 544 | |
| 545 | if (prev_client != NULL) { |
| 546 | prev_client->next = next_client; |
| 547 | if (next_client != NULL) |
| 548 | next_client->prev = prev_client; |
| 549 | |
| 550 | } else { |
| 551 | if (next_client != NULL) |
| 552 | next_client->prev = NULL; |
| 553 | controller->clients = next_client; |
| 554 | } |
| 555 | |
| 556 | controller->num_clients--; |
| 557 | agp_remove_seg_from_client(client); |
| 558 | kfree(client); |
| 559 | return 0; |
| 560 | } |
| 561 | |
| 562 | /* End - Routines for managing client lists */ |
| 563 | |
| 564 | /* File Operations */ |
| 565 | |
| 566 | static int agp_mmap(struct file *file, struct vm_area_struct *vma) |
| 567 | { |
| 568 | unsigned int size, current_size; |
| 569 | unsigned long offset; |
| 570 | struct agp_client *client; |
| 571 | struct agp_file_private *priv = file->private_data; |
| 572 | struct agp_kern_info kerninfo; |
| 573 | |
akpm@osdl.org | 1686782 | 2006-01-13 15:51:02 -0800 | [diff] [blame] | 574 | mutex_lock(&(agp_fe.agp_mutex)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 575 | |
| 576 | if (agp_fe.backend_acquired != TRUE) |
| 577 | goto out_eperm; |
| 578 | |
| 579 | if (!(test_bit(AGP_FF_IS_VALID, &priv->access_flags))) |
| 580 | goto out_eperm; |
| 581 | |
| 582 | agp_copy_info(agp_bridge, &kerninfo); |
| 583 | size = vma->vm_end - vma->vm_start; |
| 584 | current_size = kerninfo.aper_size; |
| 585 | current_size = current_size * 0x100000; |
| 586 | offset = vma->vm_pgoff << PAGE_SHIFT; |
| 587 | DBG("%lx:%lx", offset, offset+size); |
| 588 | |
| 589 | if (test_bit(AGP_FF_IS_CLIENT, &priv->access_flags)) { |
| 590 | if ((size + offset) > current_size) |
| 591 | goto out_inval; |
| 592 | |
| 593 | client = agp_find_client_by_pid(current->pid); |
| 594 | |
| 595 | if (client == NULL) |
| 596 | goto out_eperm; |
| 597 | |
| 598 | if (!agp_find_seg_in_client(client, offset, size, vma->vm_page_prot)) |
| 599 | goto out_inval; |
| 600 | |
| 601 | DBG("client vm_ops=%p", kerninfo.vm_ops); |
| 602 | if (kerninfo.vm_ops) { |
| 603 | vma->vm_ops = kerninfo.vm_ops; |
| 604 | } else if (io_remap_pfn_range(vma, vma->vm_start, |
| 605 | (kerninfo.aper_base + offset) >> PAGE_SHIFT, |
| 606 | size, vma->vm_page_prot)) { |
| 607 | goto out_again; |
| 608 | } |
akpm@osdl.org | 1686782 | 2006-01-13 15:51:02 -0800 | [diff] [blame] | 609 | mutex_unlock(&(agp_fe.agp_mutex)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 610 | return 0; |
| 611 | } |
| 612 | |
| 613 | if (test_bit(AGP_FF_IS_CONTROLLER, &priv->access_flags)) { |
| 614 | if (size != current_size) |
| 615 | goto out_inval; |
| 616 | |
| 617 | DBG("controller vm_ops=%p", kerninfo.vm_ops); |
| 618 | if (kerninfo.vm_ops) { |
| 619 | vma->vm_ops = kerninfo.vm_ops; |
| 620 | } else if (io_remap_pfn_range(vma, vma->vm_start, |
| 621 | kerninfo.aper_base >> PAGE_SHIFT, |
| 622 | size, vma->vm_page_prot)) { |
| 623 | goto out_again; |
| 624 | } |
akpm@osdl.org | 1686782 | 2006-01-13 15:51:02 -0800 | [diff] [blame] | 625 | mutex_unlock(&(agp_fe.agp_mutex)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 626 | return 0; |
| 627 | } |
| 628 | |
| 629 | out_eperm: |
akpm@osdl.org | 1686782 | 2006-01-13 15:51:02 -0800 | [diff] [blame] | 630 | mutex_unlock(&(agp_fe.agp_mutex)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 631 | return -EPERM; |
| 632 | |
| 633 | out_inval: |
akpm@osdl.org | 1686782 | 2006-01-13 15:51:02 -0800 | [diff] [blame] | 634 | mutex_unlock(&(agp_fe.agp_mutex)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 635 | return -EINVAL; |
| 636 | |
| 637 | out_again: |
akpm@osdl.org | 1686782 | 2006-01-13 15:51:02 -0800 | [diff] [blame] | 638 | mutex_unlock(&(agp_fe.agp_mutex)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 639 | return -EAGAIN; |
| 640 | } |
| 641 | |
| 642 | static int agp_release(struct inode *inode, struct file *file) |
| 643 | { |
| 644 | struct agp_file_private *priv = file->private_data; |
| 645 | |
akpm@osdl.org | 1686782 | 2006-01-13 15:51:02 -0800 | [diff] [blame] | 646 | mutex_lock(&(agp_fe.agp_mutex)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 647 | |
| 648 | DBG("priv=%p", priv); |
| 649 | |
| 650 | if (test_bit(AGP_FF_IS_CONTROLLER, &priv->access_flags)) { |
| 651 | struct agp_controller *controller; |
| 652 | |
| 653 | controller = agp_find_controller_by_pid(priv->my_pid); |
| 654 | |
| 655 | if (controller != NULL) { |
| 656 | if (controller == agp_fe.current_controller) |
| 657 | agp_controller_release_current(controller, priv); |
| 658 | agp_remove_controller(controller); |
| 659 | controller = NULL; |
| 660 | } |
| 661 | } |
| 662 | |
| 663 | if (test_bit(AGP_FF_IS_CLIENT, &priv->access_flags)) |
| 664 | agp_remove_client(priv->my_pid); |
| 665 | |
| 666 | agp_remove_file_private(priv); |
| 667 | kfree(priv); |
| 668 | file->private_data = NULL; |
akpm@osdl.org | 1686782 | 2006-01-13 15:51:02 -0800 | [diff] [blame] | 669 | mutex_unlock(&(agp_fe.agp_mutex)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 670 | return 0; |
| 671 | } |
| 672 | |
| 673 | static int agp_open(struct inode *inode, struct file *file) |
| 674 | { |
| 675 | int minor = iminor(inode); |
| 676 | struct agp_file_private *priv; |
| 677 | struct agp_client *client; |
| 678 | int rc = -ENXIO; |
| 679 | |
akpm@osdl.org | 1686782 | 2006-01-13 15:51:02 -0800 | [diff] [blame] | 680 | mutex_lock(&(agp_fe.agp_mutex)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 681 | |
| 682 | if (minor != AGPGART_MINOR) |
| 683 | goto err_out; |
| 684 | |
Dave Jones | 0ea27d9 | 2005-10-20 15:12:16 -0700 | [diff] [blame] | 685 | priv = kzalloc(sizeof(struct agp_file_private), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 686 | if (priv == NULL) |
| 687 | goto err_out_nomem; |
| 688 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 689 | set_bit(AGP_FF_ALLOW_CLIENT, &priv->access_flags); |
| 690 | priv->my_pid = current->pid; |
| 691 | |
serue@us.ibm.com | 62f29ba | 2007-12-05 13:55:36 -0800 | [diff] [blame] | 692 | if (capable(CAP_SYS_RAWIO)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 693 | /* Root priv, can be controller */ |
| 694 | set_bit(AGP_FF_ALLOW_CONTROLLER, &priv->access_flags); |
| 695 | } |
| 696 | client = agp_find_client_by_pid(current->pid); |
| 697 | |
| 698 | if (client != NULL) { |
| 699 | set_bit(AGP_FF_IS_CLIENT, &priv->access_flags); |
| 700 | set_bit(AGP_FF_IS_VALID, &priv->access_flags); |
| 701 | } |
| 702 | file->private_data = (void *) priv; |
| 703 | agp_insert_file_private(priv); |
| 704 | DBG("private=%p, client=%p", priv, client); |
akpm@osdl.org | 1686782 | 2006-01-13 15:51:02 -0800 | [diff] [blame] | 705 | mutex_unlock(&(agp_fe.agp_mutex)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 706 | return 0; |
| 707 | |
| 708 | err_out_nomem: |
| 709 | rc = -ENOMEM; |
| 710 | err_out: |
akpm@osdl.org | 1686782 | 2006-01-13 15:51:02 -0800 | [diff] [blame] | 711 | mutex_unlock(&(agp_fe.agp_mutex)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 712 | return rc; |
| 713 | } |
| 714 | |
| 715 | |
| 716 | static ssize_t agp_read(struct file *file, char __user *buf, |
| 717 | size_t count, loff_t * ppos) |
| 718 | { |
| 719 | return -EINVAL; |
| 720 | } |
| 721 | |
| 722 | static ssize_t agp_write(struct file *file, const char __user *buf, |
| 723 | size_t count, loff_t * ppos) |
| 724 | { |
| 725 | return -EINVAL; |
| 726 | } |
| 727 | |
| 728 | static int agpioc_info_wrap(struct agp_file_private *priv, void __user *arg) |
| 729 | { |
| 730 | struct agp_info userinfo; |
| 731 | struct agp_kern_info kerninfo; |
| 732 | |
| 733 | agp_copy_info(agp_bridge, &kerninfo); |
| 734 | |
| 735 | userinfo.version.major = kerninfo.version.major; |
| 736 | userinfo.version.minor = kerninfo.version.minor; |
| 737 | userinfo.bridge_id = kerninfo.device->vendor | |
| 738 | (kerninfo.device->device << 16); |
| 739 | userinfo.agp_mode = kerninfo.mode; |
| 740 | userinfo.aper_base = kerninfo.aper_base; |
| 741 | userinfo.aper_size = kerninfo.aper_size; |
| 742 | userinfo.pg_total = userinfo.pg_system = kerninfo.max_memory; |
| 743 | userinfo.pg_used = kerninfo.current_memory; |
| 744 | |
| 745 | if (copy_to_user(arg, &userinfo, sizeof(struct agp_info))) |
| 746 | return -EFAULT; |
| 747 | |
| 748 | return 0; |
| 749 | } |
| 750 | |
Zwane Mwaikambo | 0316fe8 | 2007-01-29 21:20:31 -0800 | [diff] [blame] | 751 | int agpioc_acquire_wrap(struct agp_file_private *priv) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 752 | { |
| 753 | struct agp_controller *controller; |
| 754 | |
| 755 | DBG(""); |
| 756 | |
| 757 | if (!(test_bit(AGP_FF_ALLOW_CONTROLLER, &priv->access_flags))) |
| 758 | return -EPERM; |
| 759 | |
| 760 | if (agp_fe.current_controller != NULL) |
| 761 | return -EBUSY; |
| 762 | |
Dave Jones | 6a92a4e | 2006-02-28 00:54:25 -0500 | [diff] [blame] | 763 | if (!agp_bridge) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 764 | return -ENODEV; |
| 765 | |
| 766 | if (atomic_read(&agp_bridge->agp_in_use)) |
| 767 | return -EBUSY; |
| 768 | |
| 769 | atomic_inc(&agp_bridge->agp_in_use); |
| 770 | |
| 771 | agp_fe.backend_acquired = TRUE; |
| 772 | |
| 773 | controller = agp_find_controller_by_pid(priv->my_pid); |
| 774 | |
| 775 | if (controller != NULL) { |
| 776 | agp_controller_make_current(controller); |
| 777 | } else { |
| 778 | controller = agp_create_controller(priv->my_pid); |
| 779 | |
| 780 | if (controller == NULL) { |
| 781 | agp_fe.backend_acquired = FALSE; |
| 782 | agp_backend_release(agp_bridge); |
| 783 | return -ENOMEM; |
| 784 | } |
| 785 | agp_insert_controller(controller); |
| 786 | agp_controller_make_current(controller); |
| 787 | } |
| 788 | |
| 789 | set_bit(AGP_FF_IS_CONTROLLER, &priv->access_flags); |
| 790 | set_bit(AGP_FF_IS_VALID, &priv->access_flags); |
| 791 | return 0; |
| 792 | } |
| 793 | |
Zwane Mwaikambo | 0316fe8 | 2007-01-29 21:20:31 -0800 | [diff] [blame] | 794 | int agpioc_release_wrap(struct agp_file_private *priv) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 795 | { |
| 796 | DBG(""); |
| 797 | agp_controller_release_current(agp_fe.current_controller, priv); |
| 798 | return 0; |
| 799 | } |
| 800 | |
Zwane Mwaikambo | 0316fe8 | 2007-01-29 21:20:31 -0800 | [diff] [blame] | 801 | int agpioc_setup_wrap(struct agp_file_private *priv, void __user *arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 802 | { |
| 803 | struct agp_setup mode; |
| 804 | |
| 805 | DBG(""); |
| 806 | if (copy_from_user(&mode, arg, sizeof(struct agp_setup))) |
| 807 | return -EFAULT; |
| 808 | |
| 809 | agp_enable(agp_bridge, mode.agp_mode); |
| 810 | return 0; |
| 811 | } |
| 812 | |
| 813 | static int agpioc_reserve_wrap(struct agp_file_private *priv, void __user *arg) |
| 814 | { |
| 815 | struct agp_region reserve; |
| 816 | struct agp_client *client; |
| 817 | struct agp_file_private *client_priv; |
| 818 | |
| 819 | DBG(""); |
| 820 | if (copy_from_user(&reserve, arg, sizeof(struct agp_region))) |
| 821 | return -EFAULT; |
| 822 | |
| 823 | if ((unsigned) reserve.seg_count >= ~0U/sizeof(struct agp_segment)) |
| 824 | return -EFAULT; |
| 825 | |
| 826 | client = agp_find_client_by_pid(reserve.pid); |
| 827 | |
| 828 | if (reserve.seg_count == 0) { |
| 829 | /* remove a client */ |
| 830 | client_priv = agp_find_private(reserve.pid); |
| 831 | |
| 832 | if (client_priv != NULL) { |
| 833 | set_bit(AGP_FF_IS_CLIENT, &client_priv->access_flags); |
| 834 | set_bit(AGP_FF_IS_VALID, &client_priv->access_flags); |
| 835 | } |
| 836 | if (client == NULL) { |
| 837 | /* client is already removed */ |
| 838 | return 0; |
| 839 | } |
| 840 | return agp_remove_client(reserve.pid); |
| 841 | } else { |
| 842 | struct agp_segment *segment; |
| 843 | |
| 844 | if (reserve.seg_count >= 16384) |
| 845 | return -EINVAL; |
| 846 | |
| 847 | segment = kmalloc((sizeof(struct agp_segment) * reserve.seg_count), |
| 848 | GFP_KERNEL); |
| 849 | |
| 850 | if (segment == NULL) |
| 851 | return -ENOMEM; |
| 852 | |
| 853 | if (copy_from_user(segment, (void __user *) reserve.seg_list, |
| 854 | sizeof(struct agp_segment) * reserve.seg_count)) { |
| 855 | kfree(segment); |
| 856 | return -EFAULT; |
| 857 | } |
| 858 | reserve.seg_list = segment; |
| 859 | |
| 860 | if (client == NULL) { |
| 861 | /* Create the client and add the segment */ |
| 862 | client = agp_create_client(reserve.pid); |
| 863 | |
| 864 | if (client == NULL) { |
| 865 | kfree(segment); |
| 866 | return -ENOMEM; |
| 867 | } |
| 868 | client_priv = agp_find_private(reserve.pid); |
| 869 | |
| 870 | if (client_priv != NULL) { |
| 871 | set_bit(AGP_FF_IS_CLIENT, &client_priv->access_flags); |
| 872 | set_bit(AGP_FF_IS_VALID, &client_priv->access_flags); |
| 873 | } |
| 874 | } |
| 875 | return agp_create_segment(client, &reserve); |
| 876 | } |
| 877 | /* Will never really happen */ |
| 878 | return -EINVAL; |
| 879 | } |
| 880 | |
Zwane Mwaikambo | 0316fe8 | 2007-01-29 21:20:31 -0800 | [diff] [blame] | 881 | int agpioc_protect_wrap(struct agp_file_private *priv) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 882 | { |
| 883 | DBG(""); |
| 884 | /* This function is not currently implemented */ |
| 885 | return -EINVAL; |
| 886 | } |
| 887 | |
| 888 | static int agpioc_allocate_wrap(struct agp_file_private *priv, void __user *arg) |
| 889 | { |
| 890 | struct agp_memory *memory; |
| 891 | struct agp_allocate alloc; |
| 892 | |
| 893 | DBG(""); |
| 894 | if (copy_from_user(&alloc, arg, sizeof(struct agp_allocate))) |
| 895 | return -EFAULT; |
| 896 | |
Thomas Hellstrom | a030ce4 | 2007-01-23 10:33:43 +0100 | [diff] [blame] | 897 | if (alloc.type >= AGP_USER_TYPES) |
| 898 | return -EINVAL; |
| 899 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 900 | memory = agp_allocate_memory_wrap(alloc.pg_count, alloc.type); |
| 901 | |
| 902 | if (memory == NULL) |
| 903 | return -ENOMEM; |
| 904 | |
| 905 | alloc.key = memory->key; |
| 906 | alloc.physical = memory->physical; |
| 907 | |
| 908 | if (copy_to_user(arg, &alloc, sizeof(struct agp_allocate))) { |
| 909 | agp_free_memory_wrap(memory); |
| 910 | return -EFAULT; |
| 911 | } |
| 912 | return 0; |
| 913 | } |
| 914 | |
Zwane Mwaikambo | 0316fe8 | 2007-01-29 21:20:31 -0800 | [diff] [blame] | 915 | int agpioc_deallocate_wrap(struct agp_file_private *priv, int arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 916 | { |
| 917 | struct agp_memory *memory; |
| 918 | |
| 919 | DBG(""); |
| 920 | memory = agp_find_mem_by_key(arg); |
| 921 | |
| 922 | if (memory == NULL) |
| 923 | return -EINVAL; |
| 924 | |
| 925 | agp_free_memory_wrap(memory); |
| 926 | return 0; |
| 927 | } |
| 928 | |
| 929 | static int agpioc_bind_wrap(struct agp_file_private *priv, void __user *arg) |
| 930 | { |
| 931 | struct agp_bind bind_info; |
| 932 | struct agp_memory *memory; |
| 933 | |
| 934 | DBG(""); |
| 935 | if (copy_from_user(&bind_info, arg, sizeof(struct agp_bind))) |
| 936 | return -EFAULT; |
| 937 | |
| 938 | memory = agp_find_mem_by_key(bind_info.key); |
| 939 | |
| 940 | if (memory == NULL) |
| 941 | return -EINVAL; |
| 942 | |
| 943 | return agp_bind_memory(memory, bind_info.pg_start); |
| 944 | } |
| 945 | |
| 946 | static int agpioc_unbind_wrap(struct agp_file_private *priv, void __user *arg) |
| 947 | { |
| 948 | struct agp_memory *memory; |
| 949 | struct agp_unbind unbind; |
| 950 | |
| 951 | DBG(""); |
| 952 | if (copy_from_user(&unbind, arg, sizeof(struct agp_unbind))) |
| 953 | return -EFAULT; |
| 954 | |
| 955 | memory = agp_find_mem_by_key(unbind.key); |
| 956 | |
| 957 | if (memory == NULL) |
| 958 | return -EINVAL; |
| 959 | |
| 960 | return agp_unbind_memory(memory); |
| 961 | } |
| 962 | |
Dave Airlie | a13af4b | 2007-10-29 15:14:03 +1000 | [diff] [blame] | 963 | int agpioc_chipset_flush_wrap(struct agp_file_private *priv) |
| 964 | { |
| 965 | DBG(""); |
| 966 | agp_flush_chipset(agp_bridge); |
| 967 | return 0; |
| 968 | } |
| 969 | |
Mathieu Segaud | 09aa356 | 2008-04-18 13:29:38 -0700 | [diff] [blame^] | 970 | static long agp_ioctl(struct file *file, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 971 | unsigned int cmd, unsigned long arg) |
| 972 | { |
| 973 | struct agp_file_private *curr_priv = file->private_data; |
| 974 | int ret_val = -ENOTTY; |
| 975 | |
| 976 | DBG("priv=%p, cmd=%x", curr_priv, cmd); |
akpm@osdl.org | 1686782 | 2006-01-13 15:51:02 -0800 | [diff] [blame] | 977 | mutex_lock(&(agp_fe.agp_mutex)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 978 | |
| 979 | if ((agp_fe.current_controller == NULL) && |
| 980 | (cmd != AGPIOC_ACQUIRE)) { |
| 981 | ret_val = -EINVAL; |
| 982 | goto ioctl_out; |
| 983 | } |
| 984 | if ((agp_fe.backend_acquired != TRUE) && |
| 985 | (cmd != AGPIOC_ACQUIRE)) { |
| 986 | ret_val = -EBUSY; |
| 987 | goto ioctl_out; |
| 988 | } |
| 989 | if (cmd != AGPIOC_ACQUIRE) { |
| 990 | if (!(test_bit(AGP_FF_IS_CONTROLLER, &curr_priv->access_flags))) { |
| 991 | ret_val = -EPERM; |
| 992 | goto ioctl_out; |
| 993 | } |
| 994 | /* Use the original pid of the controller, |
| 995 | * in case it's threaded */ |
| 996 | |
| 997 | if (agp_fe.current_controller->pid != curr_priv->my_pid) { |
| 998 | ret_val = -EBUSY; |
| 999 | goto ioctl_out; |
| 1000 | } |
| 1001 | } |
| 1002 | |
| 1003 | switch (cmd) { |
| 1004 | case AGPIOC_INFO: |
| 1005 | ret_val = agpioc_info_wrap(curr_priv, (void __user *) arg); |
| 1006 | break; |
| 1007 | |
| 1008 | case AGPIOC_ACQUIRE: |
| 1009 | ret_val = agpioc_acquire_wrap(curr_priv); |
| 1010 | break; |
| 1011 | |
| 1012 | case AGPIOC_RELEASE: |
| 1013 | ret_val = agpioc_release_wrap(curr_priv); |
| 1014 | break; |
| 1015 | |
| 1016 | case AGPIOC_SETUP: |
| 1017 | ret_val = agpioc_setup_wrap(curr_priv, (void __user *) arg); |
| 1018 | break; |
| 1019 | |
| 1020 | case AGPIOC_RESERVE: |
| 1021 | ret_val = agpioc_reserve_wrap(curr_priv, (void __user *) arg); |
| 1022 | break; |
| 1023 | |
| 1024 | case AGPIOC_PROTECT: |
| 1025 | ret_val = agpioc_protect_wrap(curr_priv); |
| 1026 | break; |
| 1027 | |
| 1028 | case AGPIOC_ALLOCATE: |
| 1029 | ret_val = agpioc_allocate_wrap(curr_priv, (void __user *) arg); |
| 1030 | break; |
| 1031 | |
| 1032 | case AGPIOC_DEALLOCATE: |
| 1033 | ret_val = agpioc_deallocate_wrap(curr_priv, (int) arg); |
| 1034 | break; |
| 1035 | |
| 1036 | case AGPIOC_BIND: |
| 1037 | ret_val = agpioc_bind_wrap(curr_priv, (void __user *) arg); |
| 1038 | break; |
| 1039 | |
| 1040 | case AGPIOC_UNBIND: |
| 1041 | ret_val = agpioc_unbind_wrap(curr_priv, (void __user *) arg); |
| 1042 | break; |
Dave Airlie | a13af4b | 2007-10-29 15:14:03 +1000 | [diff] [blame] | 1043 | |
| 1044 | case AGPIOC_CHIPSET_FLUSH: |
| 1045 | ret_val = agpioc_chipset_flush_wrap(curr_priv); |
| 1046 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1047 | } |
| 1048 | |
| 1049 | ioctl_out: |
| 1050 | DBG("ioctl returns %d\n", ret_val); |
akpm@osdl.org | 1686782 | 2006-01-13 15:51:02 -0800 | [diff] [blame] | 1051 | mutex_unlock(&(agp_fe.agp_mutex)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1052 | return ret_val; |
| 1053 | } |
| 1054 | |
Arjan van de Ven | 62322d2 | 2006-07-03 00:24:21 -0700 | [diff] [blame] | 1055 | static const struct file_operations agp_fops = |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1056 | { |
| 1057 | .owner = THIS_MODULE, |
| 1058 | .llseek = no_llseek, |
| 1059 | .read = agp_read, |
| 1060 | .write = agp_write, |
Mathieu Segaud | 09aa356 | 2008-04-18 13:29:38 -0700 | [diff] [blame^] | 1061 | .unlocked_ioctl = agp_ioctl, |
Zwane Mwaikambo | 0316fe8 | 2007-01-29 21:20:31 -0800 | [diff] [blame] | 1062 | #ifdef CONFIG_COMPAT |
| 1063 | .compat_ioctl = compat_agp_ioctl, |
| 1064 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1065 | .mmap = agp_mmap, |
| 1066 | .open = agp_open, |
| 1067 | .release = agp_release, |
| 1068 | }; |
| 1069 | |
| 1070 | static struct miscdevice agp_miscdev = |
| 1071 | { |
| 1072 | .minor = AGPGART_MINOR, |
| 1073 | .name = "agpgart", |
| 1074 | .fops = &agp_fops |
| 1075 | }; |
| 1076 | |
| 1077 | int agp_frontend_initialize(void) |
| 1078 | { |
| 1079 | memset(&agp_fe, 0, sizeof(struct agp_front_data)); |
akpm@osdl.org | 1686782 | 2006-01-13 15:51:02 -0800 | [diff] [blame] | 1080 | mutex_init(&(agp_fe.agp_mutex)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1081 | |
| 1082 | if (misc_register(&agp_miscdev)) { |
| 1083 | printk(KERN_ERR PFX "unable to get minor: %d\n", AGPGART_MINOR); |
| 1084 | return -EIO; |
| 1085 | } |
| 1086 | return 0; |
| 1087 | } |
| 1088 | |
| 1089 | void agp_frontend_cleanup(void) |
| 1090 | { |
| 1091 | misc_deregister(&agp_miscdev); |
| 1092 | } |