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 * $FreeBSD: src/sys/dev/drm2/drm_agpsupport.c,v 1.1 2012/05/22 11:07:44 kib Exp $ 30 */ 31 32 /** @file drm_agpsupport.c 33 * Support code for tying the kernel AGP support to DRM drivers and 34 * the DRM's AGP ioctls. 35 */ 36 37 #include <drm/drmP.h> 38 39 #include <dev/agp/agpreg.h> 40 #include <bus/pci/pcireg.h> 41 42 /* Returns 1 if AGP or 0 if not. */ 43 static int 44 drm_device_find_capability(struct drm_device *dev, int cap) 45 { 46 return (pci_find_extcap(dev->dev, cap, NULL) == 0); 47 } 48 49 int drm_device_is_agp(struct drm_device *dev) 50 { 51 if (dev->driver->device_is_agp != NULL) { 52 int ret; 53 54 /* device_is_agp returns a tristate, 0 = not AGP, 1 = definitely 55 * AGP, 2 = fall back to PCI capability 56 */ 57 ret = (*dev->driver->device_is_agp)(dev); 58 if (ret != DRM_MIGHT_BE_AGP) 59 return ret; 60 } 61 62 return (drm_device_find_capability(dev, PCIY_AGP)); 63 } 64 65 int drm_device_is_pcie(struct drm_device *dev) 66 { 67 return (drm_device_find_capability(dev, PCIY_EXPRESS)); 68 } 69 70 int drm_agp_info(struct drm_device * dev, struct drm_agp_info *info) 71 { 72 struct agp_info *kern; 73 74 if (!dev->agp || !dev->agp->acquired) 75 return EINVAL; 76 77 kern = &dev->agp->agp_info; 78 agp_get_info(dev->agp->agpdev, kern); 79 info->agp_version_major = 1; 80 info->agp_version_minor = 0; 81 info->mode = kern->ai_mode; 82 info->aperture_base = kern->ai_aperture_base; 83 info->aperture_size = kern->ai_aperture_size; 84 info->memory_allowed = kern->ai_memory_allowed; 85 info->memory_used = kern->ai_memory_used; 86 info->id_vendor = kern->ai_devid & 0xffff; 87 info->id_device = kern->ai_devid >> 16; 88 89 return 0; 90 } 91 92 int drm_agp_info_ioctl(struct drm_device *dev, void *data, 93 struct drm_file *file_priv) 94 { 95 int err; 96 struct drm_agp_info info; 97 98 err = drm_agp_info(dev, &info); 99 if (err != 0) 100 return err; 101 102 *(struct drm_agp_info *) data = info; 103 return 0; 104 } 105 106 int drm_agp_acquire_ioctl(struct drm_device *dev, void *data, 107 struct drm_file *file_priv) 108 { 109 110 return drm_agp_acquire(dev); 111 } 112 113 int drm_agp_acquire(struct drm_device *dev) 114 { 115 int retcode; 116 117 if (!dev->agp || dev->agp->acquired) 118 return EINVAL; 119 120 retcode = agp_acquire(dev->agp->agpdev); 121 if (retcode) 122 return retcode; 123 124 dev->agp->acquired = 1; 125 return 0; 126 } 127 128 int drm_agp_release_ioctl(struct drm_device *dev, void *data, 129 struct drm_file *file_priv) 130 { 131 132 return drm_agp_release(dev); 133 } 134 135 int drm_agp_release(struct drm_device * dev) 136 { 137 if (!dev->agp || !dev->agp->acquired) 138 return EINVAL; 139 agp_release(dev->agp->agpdev); 140 dev->agp->acquired = 0; 141 return 0; 142 } 143 144 int drm_agp_enable(struct drm_device *dev, struct drm_agp_mode mode) 145 { 146 147 if (!dev->agp || !dev->agp->acquired) 148 return EINVAL; 149 150 dev->agp->mode = mode.mode; 151 agp_enable(dev->agp->agpdev, mode.mode); 152 dev->agp->enabled = 1; 153 return 0; 154 } 155 156 int drm_agp_enable_ioctl(struct drm_device *dev, void *data, 157 struct drm_file *file_priv) 158 { 159 struct drm_agp_mode mode; 160 161 mode = *(struct drm_agp_mode *) data; 162 163 return drm_agp_enable(dev, mode); 164 } 165 166 int drm_agp_alloc(struct drm_device *dev, struct drm_agp_buffer *request) 167 { 168 drm_agp_mem_t *entry; 169 void *handle; 170 unsigned long pages; 171 u_int32_t type; 172 struct agp_memory_info info; 173 174 if (!dev->agp || !dev->agp->acquired) 175 return EINVAL; 176 177 entry = kmalloc(sizeof(*entry), M_DRM, M_WAITOK | M_NULLOK | M_ZERO); 178 if (entry == NULL) 179 return ENOMEM; 180 181 pages = (request->size + PAGE_SIZE - 1) / PAGE_SIZE; 182 type = (u_int32_t) request->type; 183 184 handle = drm_agp_allocate_memory(pages, type); 185 if (handle == NULL) { 186 drm_free(entry, M_DRM); 187 return ENOMEM; 188 } 189 190 entry->handle = handle; 191 entry->bound = 0; 192 entry->pages = pages; 193 entry->prev = NULL; 194 entry->next = dev->agp->memory; 195 if (dev->agp->memory) 196 dev->agp->memory->prev = entry; 197 dev->agp->memory = entry; 198 199 agp_memory_info(dev->agp->agpdev, entry->handle, &info); 200 201 request->handle = (unsigned long) entry->handle; 202 request->physical = info.ami_physical; 203 204 return 0; 205 } 206 207 int drm_agp_alloc_ioctl(struct drm_device *dev, void *data, 208 struct drm_file *file_priv) 209 { 210 struct drm_agp_buffer request; 211 int retcode; 212 213 request = *(struct drm_agp_buffer *) data; 214 215 retcode = drm_agp_alloc(dev, &request); 216 217 *(struct drm_agp_buffer *) data = request; 218 219 return retcode; 220 } 221 222 static drm_agp_mem_t * drm_agp_lookup_entry(struct drm_device *dev, 223 void *handle) 224 { 225 drm_agp_mem_t *entry; 226 227 for (entry = dev->agp->memory; entry; entry = entry->next) { 228 if (entry->handle == handle) return entry; 229 } 230 return NULL; 231 } 232 233 int drm_agp_unbind(struct drm_device *dev, struct drm_agp_binding *request) 234 { 235 drm_agp_mem_t *entry; 236 int retcode; 237 238 if (!dev->agp || !dev->agp->acquired) 239 return EINVAL; 240 241 entry = drm_agp_lookup_entry(dev, (void *)request->handle); 242 if (entry == NULL || !entry->bound) 243 return EINVAL; 244 245 retcode = drm_agp_unbind_memory(entry->handle); 246 247 if (retcode == 0) 248 entry->bound = 0; 249 250 return retcode; 251 } 252 253 int drm_agp_unbind_ioctl(struct drm_device *dev, void *data, 254 struct drm_file *file_priv) 255 { 256 struct drm_agp_binding request; 257 int retcode; 258 259 request = *(struct drm_agp_binding *) data; 260 261 retcode = drm_agp_unbind(dev, &request); 262 263 return retcode; 264 } 265 266 int drm_agp_bind(struct drm_device *dev, struct drm_agp_binding *request) 267 { 268 drm_agp_mem_t *entry; 269 int retcode; 270 int page; 271 272 if (!dev->agp || !dev->agp->acquired) 273 return EINVAL; 274 275 DRM_DEBUG("agp_bind, page_size=%x\n", (int)PAGE_SIZE); 276 277 entry = drm_agp_lookup_entry(dev, (void *)request->handle); 278 if (entry == NULL || entry->bound) 279 return EINVAL; 280 281 page = (request->offset + PAGE_SIZE - 1) / PAGE_SIZE; 282 283 retcode = drm_agp_bind_memory(entry->handle, page); 284 if (retcode == 0) 285 entry->bound = dev->agp->base + (page << PAGE_SHIFT); 286 287 return retcode; 288 } 289 290 int drm_agp_bind_ioctl(struct drm_device *dev, void *data, 291 struct drm_file *file_priv) 292 { 293 struct drm_agp_binding request; 294 int retcode; 295 296 request = *(struct drm_agp_binding *) data; 297 298 retcode = drm_agp_bind(dev, &request); 299 300 return retcode; 301 } 302 303 int drm_agp_free(struct drm_device *dev, struct drm_agp_buffer *request) 304 { 305 drm_agp_mem_t *entry; 306 307 if (!dev->agp || !dev->agp->acquired) 308 return EINVAL; 309 310 entry = drm_agp_lookup_entry(dev, (void*)request->handle); 311 if (entry == NULL) 312 return EINVAL; 313 314 if (entry->prev) 315 entry->prev->next = entry->next; 316 else 317 dev->agp->memory = entry->next; 318 if (entry->next) 319 entry->next->prev = entry->prev; 320 321 if (entry->bound) 322 drm_agp_unbind_memory(entry->handle); 323 drm_agp_free_memory(entry->handle); 324 325 drm_free(entry, M_DRM); 326 327 return 0; 328 329 } 330 331 int drm_agp_free_ioctl(struct drm_device *dev, void *data, 332 struct drm_file *file_priv) 333 { 334 struct drm_agp_buffer request; 335 int retcode; 336 337 request = *(struct drm_agp_buffer *) data; 338 339 retcode = drm_agp_free(dev, &request); 340 341 return retcode; 342 } 343 344 drm_agp_head_t *drm_agp_init(void) 345 { 346 device_t agpdev; 347 drm_agp_head_t *head = NULL; 348 int agp_available = 1; 349 350 agpdev = DRM_AGP_FIND_DEVICE(); 351 if (!agpdev) 352 agp_available = 0; 353 354 DRM_DEBUG("agp_available = %d\n", agp_available); 355 356 if (agp_available) { 357 head = kmalloc(sizeof(*head), M_DRM, 358 M_WAITOK | M_NULLOK | M_ZERO); 359 if (head == NULL) 360 return NULL; 361 head->agpdev = agpdev; 362 agp_get_info(agpdev, &head->agp_info); 363 head->base = head->agp_info.ai_aperture_base; 364 head->memory = NULL; 365 DRM_INFO("AGP at 0x%08lx %dMB\n", 366 (long)head->agp_info.ai_aperture_base, 367 (int)(head->agp_info.ai_aperture_size >> 20)); 368 } 369 return head; 370 } 371 372 void *drm_agp_allocate_memory(size_t pages, u32 type) 373 { 374 device_t agpdev; 375 376 agpdev = DRM_AGP_FIND_DEVICE(); 377 if (!agpdev) 378 return NULL; 379 380 return agp_alloc_memory(agpdev, type, pages << AGP_PAGE_SHIFT); 381 } 382 383 int drm_agp_free_memory(void *handle) 384 { 385 device_t agpdev; 386 387 agpdev = DRM_AGP_FIND_DEVICE(); 388 if (!agpdev || !handle) 389 return 0; 390 391 agp_free_memory(agpdev, handle); 392 return 1; 393 } 394 395 int drm_agp_bind_memory(void *handle, off_t start) 396 { 397 device_t agpdev; 398 399 agpdev = DRM_AGP_FIND_DEVICE(); 400 if (!agpdev || !handle) 401 return EINVAL; 402 403 return agp_bind_memory(agpdev, handle, start * PAGE_SIZE); 404 } 405 406 int drm_agp_unbind_memory(void *handle) 407 { 408 device_t agpdev; 409 410 agpdev = DRM_AGP_FIND_DEVICE(); 411 if (!agpdev || !handle) 412 return EINVAL; 413 414 return agp_unbind_memory(agpdev, handle); 415 } 416