1 /*- 2 * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas. 3 * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California. 4 * All Rights Reserved. 5 * 6 * Permission is hereby granted, free of charge, to any person obtaining a 7 * copy of this software and associated documentation files (the "Software"), 8 * to deal in the Software without restriction, including without limitation 9 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 10 * and/or sell copies of the Software, and to permit persons to whom the 11 * Software is furnished to do so, subject to the following conditions: 12 * 13 * The above copyright notice and this permission notice (including the next 14 * paragraph) shall be included in all copies or substantial portions of the 15 * Software. 16 * 17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 20 * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR 21 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 22 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 23 * OTHER DEALINGS IN THE SOFTWARE. 24 * 25 * Author: 26 * Rickard E. (Rik) Faith <faith@valinux.com> 27 * Gareth Hughes <gareth@valinux.com> 28 * 29 */ 30 31 #include <sys/cdefs.h> 32 __FBSDID("$FreeBSD$"); 33 34 /** @file drm_agpsupport.c 35 * Support code for tying the kernel AGP support to DRM drivers and 36 * the DRM's AGP ioctls. 37 */ 38 39 #include <dev/drm2/drmP.h> 40 41 #include <dev/agp/agpreg.h> 42 #include <dev/pci/pcireg.h> 43 44 /* Returns 1 if AGP or 0 if not. */ 45 static int 46 drm_device_find_capability(struct drm_device *dev, int cap) 47 { 48 49 return (pci_find_cap(dev->device, cap, NULL) == 0); 50 } 51 52 int drm_device_is_agp(struct drm_device *dev) 53 { 54 if (dev->driver->device_is_agp != NULL) { 55 int ret; 56 57 /* device_is_agp returns a tristate, 0 = not AGP, 1 = definitely 58 * AGP, 2 = fall back to PCI capability 59 */ 60 ret = (*dev->driver->device_is_agp)(dev); 61 if (ret != DRM_MIGHT_BE_AGP) 62 return ret; 63 } 64 65 return (drm_device_find_capability(dev, PCIY_AGP)); 66 } 67 68 int drm_device_is_pcie(struct drm_device *dev) 69 { 70 return (drm_device_find_capability(dev, PCIY_EXPRESS)); 71 } 72 73 int drm_agp_info(struct drm_device * dev, struct drm_agp_info *info) 74 { 75 struct agp_info *kern; 76 77 if (!dev->agp || !dev->agp->acquired) 78 return EINVAL; 79 80 kern = &dev->agp->info; 81 agp_get_info(dev->agp->agpdev, kern); 82 info->agp_version_major = 1; 83 info->agp_version_minor = 0; 84 info->mode = kern->ai_mode; 85 info->aperture_base = kern->ai_aperture_base; 86 info->aperture_size = kern->ai_aperture_size; 87 info->memory_allowed = kern->ai_memory_allowed; 88 info->memory_used = kern->ai_memory_used; 89 info->id_vendor = kern->ai_devid & 0xffff; 90 info->id_device = kern->ai_devid >> 16; 91 92 return 0; 93 } 94 95 int drm_agp_info_ioctl(struct drm_device *dev, void *data, 96 struct drm_file *file_priv) 97 { 98 int err; 99 struct drm_agp_info info; 100 101 err = drm_agp_info(dev, &info); 102 if (err != 0) 103 return err; 104 105 *(struct drm_agp_info *) data = info; 106 return 0; 107 } 108 109 int drm_agp_acquire_ioctl(struct drm_device *dev, void *data, 110 struct drm_file *file_priv) 111 { 112 113 return drm_agp_acquire(dev); 114 } 115 116 int drm_agp_acquire(struct drm_device *dev) 117 { 118 int retcode; 119 120 if (!dev->agp || dev->agp->acquired) 121 return EINVAL; 122 123 retcode = agp_acquire(dev->agp->agpdev); 124 if (retcode) 125 return retcode; 126 127 dev->agp->acquired = 1; 128 return 0; 129 } 130 131 int drm_agp_release_ioctl(struct drm_device *dev, void *data, 132 struct drm_file *file_priv) 133 { 134 135 return drm_agp_release(dev); 136 } 137 138 int drm_agp_release(struct drm_device * dev) 139 { 140 if (!dev->agp || !dev->agp->acquired) 141 return EINVAL; 142 agp_release(dev->agp->agpdev); 143 dev->agp->acquired = 0; 144 return 0; 145 } 146 147 int drm_agp_enable(struct drm_device *dev, struct drm_agp_mode mode) 148 { 149 150 if (!dev->agp || !dev->agp->acquired) 151 return EINVAL; 152 153 dev->agp->mode = mode.mode; 154 agp_enable(dev->agp->agpdev, mode.mode); 155 dev->agp->enabled = 1; 156 return 0; 157 } 158 159 int drm_agp_enable_ioctl(struct drm_device *dev, void *data, 160 struct drm_file *file_priv) 161 { 162 struct drm_agp_mode mode; 163 164 mode = *(struct drm_agp_mode *) data; 165 166 return drm_agp_enable(dev, mode); 167 } 168 169 int drm_agp_alloc(struct drm_device *dev, struct drm_agp_buffer *request) 170 { 171 drm_agp_mem_t *entry; 172 void *handle; 173 unsigned long pages; 174 u_int32_t type; 175 struct agp_memory_info info; 176 177 if (!dev->agp || !dev->agp->acquired) 178 return EINVAL; 179 180 entry = malloc(sizeof(*entry), DRM_MEM_AGPLISTS, M_NOWAIT | M_ZERO); 181 if (entry == NULL) 182 return ENOMEM; 183 184 pages = (request->size + PAGE_SIZE - 1) / PAGE_SIZE; 185 type = (u_int32_t) request->type; 186 187 DRM_UNLOCK(dev); 188 handle = drm_agp_allocate_memory(pages, type); 189 DRM_LOCK(dev); 190 if (handle == NULL) { 191 free(entry, DRM_MEM_AGPLISTS); 192 return ENOMEM; 193 } 194 195 entry->handle = handle; 196 entry->bound = 0; 197 entry->pages = pages; 198 entry->prev = NULL; 199 entry->next = dev->agp->memory; 200 if (dev->agp->memory) 201 dev->agp->memory->prev = entry; 202 dev->agp->memory = entry; 203 204 agp_memory_info(dev->agp->agpdev, entry->handle, &info); 205 206 request->handle = (unsigned long) entry->handle; 207 request->physical = info.ami_physical; 208 209 return 0; 210 } 211 212 int drm_agp_alloc_ioctl(struct drm_device *dev, void *data, 213 struct drm_file *file_priv) 214 { 215 struct drm_agp_buffer request; 216 int retcode; 217 218 request = *(struct drm_agp_buffer *) data; 219 220 DRM_LOCK(dev); 221 retcode = drm_agp_alloc(dev, &request); 222 DRM_UNLOCK(dev); 223 224 *(struct drm_agp_buffer *) data = request; 225 226 return retcode; 227 } 228 229 static drm_agp_mem_t * drm_agp_lookup_entry(struct drm_device *dev, 230 void *handle) 231 { 232 drm_agp_mem_t *entry; 233 234 for (entry = dev->agp->memory; entry; entry = entry->next) { 235 if (entry->handle == handle) return entry; 236 } 237 return NULL; 238 } 239 240 int drm_agp_unbind(struct drm_device *dev, struct drm_agp_binding *request) 241 { 242 drm_agp_mem_t *entry; 243 int retcode; 244 245 if (!dev->agp || !dev->agp->acquired) 246 return EINVAL; 247 248 entry = drm_agp_lookup_entry(dev, (void *)request->handle); 249 if (entry == NULL || !entry->bound) 250 return EINVAL; 251 252 DRM_UNLOCK(dev); 253 retcode = drm_agp_unbind_memory(entry->handle); 254 DRM_LOCK(dev); 255 256 if (retcode == 0) 257 entry->bound = 0; 258 259 return retcode; 260 } 261 262 int drm_agp_unbind_ioctl(struct drm_device *dev, void *data, 263 struct drm_file *file_priv) 264 { 265 struct drm_agp_binding request; 266 int retcode; 267 268 request = *(struct drm_agp_binding *) data; 269 270 DRM_LOCK(dev); 271 retcode = drm_agp_unbind(dev, &request); 272 DRM_UNLOCK(dev); 273 274 return retcode; 275 } 276 277 int drm_agp_bind(struct drm_device *dev, struct drm_agp_binding *request) 278 { 279 drm_agp_mem_t *entry; 280 int retcode; 281 int page; 282 283 if (!dev->agp || !dev->agp->acquired) 284 return EINVAL; 285 286 DRM_DEBUG("agp_bind, page_size=%x\n", (int)PAGE_SIZE); 287 288 entry = drm_agp_lookup_entry(dev, (void *)request->handle); 289 if (entry == NULL || entry->bound) 290 return EINVAL; 291 292 page = (request->offset + PAGE_SIZE - 1) / PAGE_SIZE; 293 294 DRM_UNLOCK(dev); 295 retcode = drm_agp_bind_memory(entry->handle, page); 296 DRM_LOCK(dev); 297 if (retcode == 0) 298 entry->bound = dev->agp->base + (page << PAGE_SHIFT); 299 300 return retcode; 301 } 302 303 int drm_agp_bind_ioctl(struct drm_device *dev, void *data, 304 struct drm_file *file_priv) 305 { 306 struct drm_agp_binding request; 307 int retcode; 308 309 request = *(struct drm_agp_binding *) data; 310 311 DRM_LOCK(dev); 312 retcode = drm_agp_bind(dev, &request); 313 DRM_UNLOCK(dev); 314 315 return retcode; 316 } 317 318 int drm_agp_free(struct drm_device *dev, struct drm_agp_buffer *request) 319 { 320 drm_agp_mem_t *entry; 321 322 if (!dev->agp || !dev->agp->acquired) 323 return EINVAL; 324 325 entry = drm_agp_lookup_entry(dev, (void*)request->handle); 326 if (entry == NULL) 327 return EINVAL; 328 329 if (entry->prev) 330 entry->prev->next = entry->next; 331 else 332 dev->agp->memory = entry->next; 333 if (entry->next) 334 entry->next->prev = entry->prev; 335 336 DRM_UNLOCK(dev); 337 if (entry->bound) 338 drm_agp_unbind_memory(entry->handle); 339 drm_agp_free_memory(entry->handle); 340 DRM_LOCK(dev); 341 342 free(entry, DRM_MEM_AGPLISTS); 343 344 return 0; 345 346 } 347 348 int drm_agp_free_ioctl(struct drm_device *dev, void *data, 349 struct drm_file *file_priv) 350 { 351 struct drm_agp_buffer request; 352 int retcode; 353 354 request = *(struct drm_agp_buffer *) data; 355 356 DRM_LOCK(dev); 357 retcode = drm_agp_free(dev, &request); 358 DRM_UNLOCK(dev); 359 360 return retcode; 361 } 362 363 drm_agp_head_t *drm_agp_init(void) 364 { 365 device_t agpdev; 366 drm_agp_head_t *head = NULL; 367 int agp_available = 1; 368 369 agpdev = DRM_AGP_FIND_DEVICE(); 370 if (!agpdev) 371 agp_available = 0; 372 373 DRM_DEBUG("agp_available = %d\n", agp_available); 374 375 if (agp_available) { 376 head = malloc(sizeof(*head), DRM_MEM_AGPLISTS, 377 M_NOWAIT | M_ZERO); 378 if (head == NULL) 379 return NULL; 380 head->agpdev = agpdev; 381 agp_get_info(agpdev, &head->info); 382 head->base = head->info.ai_aperture_base; 383 head->memory = NULL; 384 DRM_INFO("AGP at 0x%08lx %dMB\n", 385 (long)head->info.ai_aperture_base, 386 (int)(head->info.ai_aperture_size >> 20)); 387 } 388 return head; 389 } 390 391 void *drm_agp_allocate_memory(size_t pages, u32 type) 392 { 393 device_t agpdev; 394 395 agpdev = DRM_AGP_FIND_DEVICE(); 396 if (!agpdev) 397 return NULL; 398 399 return agp_alloc_memory(agpdev, type, pages << PAGE_SHIFT); 400 } 401 402 int drm_agp_free_memory(void *handle) 403 { 404 device_t agpdev; 405 406 agpdev = DRM_AGP_FIND_DEVICE(); 407 if (!agpdev || !handle) 408 return 0; 409 410 agp_free_memory(agpdev, handle); 411 return 1; 412 } 413 414 int drm_agp_bind_memory(void *handle, off_t start) 415 { 416 device_t agpdev; 417 418 agpdev = DRM_AGP_FIND_DEVICE(); 419 if (!agpdev || !handle) 420 return EINVAL; 421 422 return agp_bind_memory(agpdev, handle, start * PAGE_SIZE); 423 } 424 425 int drm_agp_unbind_memory(void *handle) 426 { 427 device_t agpdev; 428 429 agpdev = DRM_AGP_FIND_DEVICE(); 430 if (!agpdev || !handle) 431 return EINVAL; 432 433 return agp_unbind_memory(agpdev, handle); 434 } 435