1 /* $OpenBSD: drm_agpsupport.c,v 1.20 2011/06/02 18:22:00 weerd Exp $ */ 2 /*- 3 * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas. 4 * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California. 5 * All Rights Reserved. 6 * 7 * Permission is hereby granted, free of charge, to any person obtaining a 8 * copy of this software and associated documentation files (the "Software"), 9 * to deal in the Software without restriction, including without limitation 10 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 11 * and/or sell copies of the Software, and to permit persons to whom the 12 * Software is furnished to do so, subject to the following conditions: 13 * 14 * The above copyright notice and this permission notice (including the next 15 * paragraph) shall be included in all copies or substantial portions of the 16 * Software. 17 * 18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 19 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 20 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 21 * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR 22 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 23 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 24 * OTHER DEALINGS IN THE SOFTWARE. 25 * 26 * Author: 27 * Rickard E. (Rik) Faith <faith@valinux.com> 28 * Gareth Hughes <gareth@valinux.com> 29 * 30 */ 31 32 /* 33 * Support code for tying the kernel AGP support to DRM drivers and 34 * the DRM's AGP ioctls. 35 */ 36 37 #include "drmP.h" 38 39 struct drm_agp_mem *drm_agp_lookup_entry(struct drm_device *, void *); 40 void drm_agp_remove_entry(struct drm_device *, 41 struct drm_agp_mem *); 42 43 int 44 drm_agp_info(struct drm_device * dev, struct drm_agp_info *info) 45 { 46 struct agp_info *kern; 47 48 if (dev->agp == NULL || !dev->agp->acquired) 49 return (EINVAL); 50 51 kern = &dev->agp->info; 52 #ifndef DRM_NO_AGP 53 agp_get_info(dev->agp->agpdev, kern); 54 #endif 55 info->agp_version_major = 1; 56 info->agp_version_minor = 0; 57 info->mode = kern->ai_mode; 58 info->aperture_base = kern->ai_aperture_base; 59 info->aperture_size = kern->ai_aperture_size; 60 info->memory_allowed = kern->ai_memory_allowed; 61 info->memory_used = kern->ai_memory_used; 62 info->id_vendor = kern->ai_devid & 0xffff; 63 info->id_device = kern->ai_devid >> 16; 64 65 return (0); 66 } 67 68 int 69 drm_agp_info_ioctl(struct drm_device *dev, void *data, 70 struct drm_file *file_priv) 71 { 72 struct drm_agp_info *info = data; 73 74 return (drm_agp_info(dev, info)); 75 } 76 77 int 78 drm_agp_acquire_ioctl(struct drm_device *dev, void *data, 79 struct drm_file *file_priv) 80 { 81 return (drm_agp_acquire(dev)); 82 } 83 84 int 85 drm_agp_acquire(struct drm_device *dev) 86 { 87 #ifndef DRM_NO_AGP 88 int retcode; 89 90 if (dev->agp == NULL || dev->agp->acquired) 91 return (EINVAL); 92 93 retcode = agp_acquire(dev->agp->agpdev); 94 if (retcode) 95 return (retcode); 96 97 dev->agp->acquired = 1; 98 #endif 99 return (0); 100 } 101 102 int 103 drm_agp_release_ioctl(struct drm_device *dev, void *data, 104 struct drm_file *file_priv) 105 { 106 return (drm_agp_release(dev)); 107 } 108 109 int 110 drm_agp_release(struct drm_device * dev) 111 { 112 #ifndef DRM_NO_AGP 113 if (dev->agp == NULL || !dev->agp->acquired) 114 return (EINVAL); 115 agp_release(dev->agp->agpdev); 116 dev->agp->acquired = 0; 117 #endif 118 return (0); 119 } 120 121 int 122 drm_agp_enable(struct drm_device *dev, drm_agp_mode_t mode) 123 { 124 int retcode = 0; 125 #ifndef DRM_NO_AGP 126 if (dev->agp == NULL || !dev->agp->acquired) 127 return (EINVAL); 128 129 dev->agp->mode = mode.mode; 130 if ((retcode = agp_enable(dev->agp->agpdev, mode.mode)) == 0) 131 dev->agp->enabled = 1; 132 #endif 133 return (retcode); 134 } 135 136 int 137 drm_agp_enable_ioctl(struct drm_device *dev, void *data, 138 struct drm_file *file_priv) 139 { 140 struct drm_agp_mode *mode = data; 141 142 return (drm_agp_enable(dev, *mode)); 143 } 144 145 int 146 drm_agp_alloc(struct drm_device *dev, struct drm_agp_buffer *request) 147 { 148 #ifndef DRM_NO_AGP 149 struct drm_agp_mem *entry; 150 void *handle; 151 struct agp_memory_info info; 152 unsigned long pages; 153 u_int32_t type; 154 155 if (dev->agp == NULL || !dev->agp->acquired) 156 return (EINVAL); 157 158 entry = drm_alloc(sizeof(*entry)); 159 if (entry == NULL) 160 return (ENOMEM); 161 162 pages = (request->size + PAGE_SIZE - 1) / PAGE_SIZE; 163 type = (u_int32_t)request->type; 164 165 handle = agp_alloc_memory(dev->agp->agpdev, type, 166 pages << AGP_PAGE_SHIFT); 167 if (handle == NULL) { 168 drm_free(entry); 169 return (ENOMEM); 170 } 171 172 entry->handle = handle; 173 entry->bound = 0; 174 entry->pages = pages; 175 176 agp_memory_info(dev->agp->agpdev, entry->handle, &info); 177 178 request->handle = (unsigned long)entry->handle; 179 request->physical = info.ami_physical; 180 DRM_LOCK(); 181 TAILQ_INSERT_HEAD(&dev->agp->memory, entry, link); 182 DRM_UNLOCK(); 183 #endif 184 185 return (0); 186 } 187 188 int 189 drm_agp_alloc_ioctl(struct drm_device *dev, void *data, 190 struct drm_file *file_priv) 191 { 192 struct drm_agp_buffer *request = data; 193 194 return (drm_agp_alloc(dev, request)); 195 } 196 197 /* 198 * find entry on agp list. Must be called with dev_lock locked. 199 */ 200 struct drm_agp_mem * 201 drm_agp_lookup_entry(struct drm_device *dev, void *handle) 202 { 203 struct drm_agp_mem *entry; 204 205 TAILQ_FOREACH(entry, &dev->agp->memory, link) { 206 if (entry->handle == handle) 207 break; 208 } 209 return (entry); 210 } 211 212 int 213 drm_agp_unbind(struct drm_device *dev, struct drm_agp_binding *request) 214 { 215 struct drm_agp_mem *entry; 216 int retcode; 217 218 if (dev->agp == NULL || !dev->agp->acquired) 219 return (EINVAL); 220 221 DRM_LOCK(); 222 entry = drm_agp_lookup_entry(dev, (void *)request->handle); 223 if (entry == NULL || !entry->bound) { 224 DRM_UNLOCK(); 225 return (EINVAL); 226 } 227 228 retcode = agp_unbind_memory(dev->agp->agpdev, entry->handle); 229 230 if (retcode == 0) 231 entry->bound = 0; 232 DRM_UNLOCK(); 233 234 return (retcode); 235 } 236 237 int 238 drm_agp_unbind_ioctl(struct drm_device *dev, void *data, 239 struct drm_file *file_priv) 240 { 241 struct drm_agp_binding *request = data; 242 243 return (drm_agp_unbind(dev, request)); 244 } 245 246 int 247 drm_agp_bind(struct drm_device *dev, struct drm_agp_binding *request) 248 { 249 struct drm_agp_mem *entry; 250 int retcode, page; 251 252 if (dev->agp == NULL || !dev->agp->acquired) 253 return (EINVAL); 254 255 DRM_DEBUG("agp_bind, page_size=%x\n", PAGE_SIZE); 256 257 DRM_LOCK(); 258 entry = drm_agp_lookup_entry(dev, (void *)request->handle); 259 if (entry == NULL || entry->bound) { 260 DRM_UNLOCK(); 261 return (EINVAL); 262 } 263 264 page = (request->offset + PAGE_SIZE - 1) / PAGE_SIZE; 265 266 retcode = agp_bind_memory(dev->agp->agpdev, entry->handle, 267 page * PAGE_SIZE); 268 if (retcode == 0) 269 entry->bound = dev->agp->base + (page << PAGE_SHIFT); 270 DRM_UNLOCK(); 271 272 return (retcode); 273 } 274 275 int 276 drm_agp_bind_ioctl(struct drm_device *dev, void *data, 277 struct drm_file *file_priv) 278 { 279 struct drm_agp_binding *request = data; 280 281 return (drm_agp_bind(dev, request)); 282 } 283 284 /* 285 * Remove entry from list and free. Call locked. 286 */ 287 void 288 drm_agp_remove_entry(struct drm_device *dev, struct drm_agp_mem *entry) 289 { 290 TAILQ_REMOVE(&dev->agp->memory, entry, link); 291 292 if (entry->bound) 293 agp_unbind_memory(dev->agp->agpdev, entry->handle); 294 agp_free_memory(dev->agp->agpdev, entry->handle); 295 drm_free(entry); 296 } 297 298 void 299 drm_agp_takedown(struct drm_device *dev) 300 { 301 struct drm_agp_mem *entry; 302 303 if (dev->agp == NULL) 304 return; 305 306 /* 307 * Remove AGP resources, but leave dev->agp intact until 308 * we detach the device 309 */ 310 DRM_LOCK(); 311 while ((entry = TAILQ_FIRST(&dev->agp->memory)) != NULL) 312 drm_agp_remove_entry(dev, entry); 313 DRM_UNLOCK(); 314 315 drm_agp_release(dev); 316 dev->agp->enabled = 0; 317 } 318 319 int 320 drm_agp_free(struct drm_device *dev, struct drm_agp_buffer *request) 321 { 322 struct drm_agp_mem *entry; 323 324 if (dev->agp == NULL || !dev->agp->acquired) 325 return (EINVAL); 326 327 DRM_LOCK(); 328 entry = drm_agp_lookup_entry(dev, (void*)request->handle); 329 if (entry == NULL) { 330 DRM_UNLOCK(); 331 return (EINVAL); 332 } 333 334 drm_agp_remove_entry(dev, entry); 335 DRM_UNLOCK(); 336 337 return (0); 338 } 339 340 int 341 drm_agp_free_ioctl(struct drm_device *dev, void *data, 342 struct drm_file *file_priv) 343 { 344 struct drm_agp_buffer *request = data; 345 346 return (drm_agp_free(dev, request)); 347 } 348 349 struct drm_agp_head * 350 drm_agp_init(void) 351 { 352 #ifndef DRM_NO_AGP 353 struct device *agpdev; 354 struct drm_agp_head *head = NULL; 355 int agp_available = 1; 356 357 agpdev = agp_find_device(0); 358 if (agpdev == NULL) 359 agp_available = 0; 360 361 DRM_DEBUG("agp_available = %d\n", agp_available); 362 363 if (agp_available) { 364 head = drm_calloc(1, sizeof(*head)); 365 if (head == NULL) 366 return (NULL); 367 head->agpdev = agpdev; 368 agp_get_info(agpdev, &head->info); 369 head->base = head->info.ai_aperture_base; 370 TAILQ_INIT(&head->memory); 371 } 372 return (head); 373 #else 374 return (NULL); 375 #endif 376 } 377