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 (at) valinux.com> 27 * Gareth Hughes <gareth (at) valinux.com> 28 * 29 */ 30 31 /** @file drm_agpsupport.c 32 * Support code for tying the kernel AGP support to DRM drivers and 33 * the DRM's AGP ioctls. 34 */ 35 36 #include "drmP.h" 37 38 #if defined(__FreeBSD__) 39 #if __FreeBSD_version >= 800004 40 #include <dev/agp/agpreg.h> 41 #else /* __FreeBSD_version >= 800004 */ 42 #include <pci/agpreg.h> 43 #endif /* __FreeBSD_version >= 800004 */ 44 #include <dev/pci/pcireg.h> 45 #endif 46 47 /* Returns 1 if AGP or 0 if not. */ 48 static int 49 drm_device_find_capability(struct drm_device *dev, int cap) 50 { 51 #if defined(__FreeBSD__) 52 #if __FreeBSD_version >= 602102 53 54 return (pci_find_extcap(dev->device, cap, NULL) == 0); 55 #else 56 /* Code taken from agp.c. IWBNI that was a public interface. */ 57 u_int32_t status; 58 u_int8_t ptr, next; 59 60 /* 61 * Check the CAP_LIST bit of the PCI status register first. 62 */ 63 status = pci_read_config(dev->device, PCIR_STATUS, 2); 64 if (!(status & 0x10)) 65 return 0; 66 67 /* 68 * Traverse the capabilities list. 69 */ 70 for (ptr = pci_read_config(dev->device, AGP_CAPPTR, 1); 71 ptr != 0; 72 ptr = next) { 73 u_int32_t capid = pci_read_config(dev->device, ptr, 4); 74 next = AGP_CAPID_GET_NEXT_PTR(capid); 75 76 /* 77 * If this capability entry ID is cap, then we are done. 78 */ 79 if (AGP_CAPID_GET_CAP_ID(capid) == cap) 80 return 1; 81 } 82 83 return 0; 84 #endif 85 #elif defined(__NetBSD__) 86 return pci_get_capability(dev->pa.pa_pc, dev->pa.pa_tag, cap, NULL, 87 NULL); 88 #endif 89 } 90 91 int drm_device_is_agp(struct drm_device *dev) 92 { 93 if (dev->driver->device_is_agp != NULL) { 94 int ret; 95 96 /* device_is_agp returns a tristate, 0 = not AGP, 1 = definitely 97 * AGP, 2 = fall back to PCI capability 98 */ 99 ret = (*dev->driver->device_is_agp)(dev); 100 if (ret != DRM_MIGHT_BE_AGP) 101 return ret; 102 } 103 104 return (drm_device_find_capability(dev, PCIY_AGP)); 105 } 106 107 int drm_device_is_pcie(struct drm_device *dev) 108 { 109 return (drm_device_find_capability(dev, PCIY_EXPRESS)); 110 } 111 112 int drm_agp_info(struct drm_device * dev, struct drm_agp_info *info) 113 { 114 struct agp_info *kern; 115 116 if (!dev->agp || !dev->agp->acquired) 117 return EINVAL; 118 119 kern = &dev->agp->info; 120 agp_get_info(dev->agp->agpdev, kern); 121 info->agp_version_major = 1; 122 info->agp_version_minor = 0; 123 info->mode = kern->ai_mode; 124 info->aperture_base = kern->ai_aperture_base; 125 info->aperture_size = kern->ai_aperture_size; 126 info->memory_allowed = kern->ai_memory_allowed; 127 info->memory_used = kern->ai_memory_used; 128 info->id_vendor = kern->ai_devid & 0xffff; 129 info->id_device = kern->ai_devid >> 16; 130 131 return 0; 132 } 133 134 int drm_agp_info_ioctl(struct drm_device *dev, void *data, 135 struct drm_file *file_priv) 136 { 137 int err; 138 struct drm_agp_info info; 139 140 err = drm_agp_info(dev, &info); 141 if (err != 0) 142 return err; 143 144 *(struct drm_agp_info *) data = info; 145 return 0; 146 } 147 148 int drm_agp_acquire_ioctl(struct drm_device *dev, void *data, 149 struct drm_file *file_priv) 150 { 151 152 return drm_agp_acquire(dev); 153 } 154 155 int drm_agp_acquire(struct drm_device *dev) 156 { 157 int retcode; 158 159 if (!dev->agp || dev->agp->acquired) 160 return EINVAL; 161 162 retcode = agp_acquire(dev->agp->agpdev); 163 if (retcode) 164 return retcode; 165 166 dev->agp->acquired = 1; 167 return 0; 168 } 169 170 int drm_agp_release_ioctl(struct drm_device *dev, void *data, 171 struct drm_file *file_priv) 172 { 173 174 return drm_agp_release(dev); 175 } 176 177 int drm_agp_release(struct drm_device * dev) 178 { 179 if (!dev->agp || !dev->agp->acquired) 180 return EINVAL; 181 agp_release(dev->agp->agpdev); 182 dev->agp->acquired = 0; 183 return 0; 184 } 185 186 int drm_agp_enable(struct drm_device *dev, struct drm_agp_mode mode) 187 { 188 189 if (!dev->agp || !dev->agp->acquired) 190 return EINVAL; 191 192 dev->agp->mode = mode.mode; 193 agp_enable(dev->agp->agpdev, mode.mode); 194 dev->agp->enabled = 1; 195 return 0; 196 } 197 198 int drm_agp_enable_ioctl(struct drm_device *dev, void *data, 199 struct drm_file *file_priv) 200 { 201 struct drm_agp_mode mode; 202 203 mode = *(struct drm_agp_mode *) data; 204 205 return drm_agp_enable(dev, mode); 206 } 207 208 int drm_agp_alloc(struct drm_device *dev, struct drm_agp_buffer *request) 209 { 210 drm_agp_mem_t *entry; 211 void *handle; 212 unsigned long pages; 213 u_int32_t type; 214 struct agp_memory_info info; 215 216 if (!dev->agp || !dev->agp->acquired) 217 return EINVAL; 218 219 entry = malloc(sizeof(*entry), DRM_MEM_AGPLISTS, M_NOWAIT | M_ZERO); 220 if (entry == NULL) 221 return ENOMEM; 222 223 pages = (request->size + PAGE_SIZE - 1) / PAGE_SIZE; 224 type = (u_int32_t) request->type; 225 226 DRM_UNLOCK(); 227 handle = drm_agp_allocate_memory(pages, type); 228 DRM_LOCK(); 229 if (handle == NULL) { 230 free(entry, DRM_MEM_AGPLISTS); 231 return ENOMEM; 232 } 233 234 entry->handle = handle; 235 entry->bound = 0; 236 entry->pages = pages; 237 entry->prev = NULL; 238 entry->next = dev->agp->memory; 239 if (dev->agp->memory) 240 dev->agp->memory->prev = entry; 241 dev->agp->memory = entry; 242 243 agp_memory_info(dev->agp->agpdev, entry->handle, &info); 244 245 request->handle = (unsigned long) entry->handle; 246 request->physical = info.ami_physical; 247 248 return 0; 249 } 250 251 int drm_agp_alloc_ioctl(struct drm_device *dev, void *data, 252 struct drm_file *file_priv) 253 { 254 struct drm_agp_buffer request; 255 int retcode; 256 257 request = *(struct drm_agp_buffer *) data; 258 259 DRM_LOCK(); 260 retcode = drm_agp_alloc(dev, &request); 261 DRM_UNLOCK(); 262 263 *(struct drm_agp_buffer *) data = request; 264 265 return retcode; 266 } 267 268 static drm_agp_mem_t * drm_agp_lookup_entry(struct drm_device *dev, 269 void *handle) 270 { 271 drm_agp_mem_t *entry; 272 273 for (entry = dev->agp->memory; entry; entry = entry->next) { 274 if (entry->handle == handle) return entry; 275 } 276 return NULL; 277 } 278 279 int drm_agp_unbind(struct drm_device *dev, struct drm_agp_binding *request) 280 { 281 drm_agp_mem_t *entry; 282 int retcode; 283 284 if (!dev->agp || !dev->agp->acquired) 285 return EINVAL; 286 287 entry = drm_agp_lookup_entry(dev, (void *)request->handle); 288 if (entry == NULL || !entry->bound) 289 return EINVAL; 290 291 DRM_UNLOCK(); 292 retcode = drm_agp_unbind_memory(entry->handle); 293 DRM_LOCK(); 294 295 if (retcode == 0) 296 entry->bound = 0; 297 298 return retcode; 299 } 300 301 int drm_agp_unbind_ioctl(struct drm_device *dev, void *data, 302 struct drm_file *file_priv) 303 { 304 struct drm_agp_binding request; 305 int retcode; 306 307 request = *(struct drm_agp_binding *) data; 308 309 DRM_LOCK(); 310 retcode = drm_agp_unbind(dev, &request); 311 DRM_UNLOCK(); 312 313 return retcode; 314 } 315 316 int drm_agp_bind(struct drm_device *dev, struct drm_agp_binding *request) 317 { 318 drm_agp_mem_t *entry; 319 int retcode; 320 int page; 321 322 if (!dev->agp || !dev->agp->acquired) 323 return EINVAL; 324 325 DRM_DEBUG("agp_bind, page_size=%x\n", PAGE_SIZE); 326 327 entry = drm_agp_lookup_entry(dev, (void *)request->handle); 328 if (entry == NULL || entry->bound) 329 return EINVAL; 330 331 page = (request->offset + PAGE_SIZE - 1) / PAGE_SIZE; 332 333 DRM_UNLOCK(); 334 retcode = drm_agp_bind_memory(entry->handle, page); 335 DRM_LOCK(); 336 if (retcode == 0) 337 entry->bound = dev->agp->base + (page << PAGE_SHIFT); 338 339 return retcode; 340 } 341 342 int drm_agp_bind_ioctl(struct drm_device *dev, void *data, 343 struct drm_file *file_priv) 344 { 345 struct drm_agp_binding request; 346 int retcode; 347 348 request = *(struct drm_agp_binding *) data; 349 350 DRM_LOCK(); 351 retcode = drm_agp_bind(dev, &request); 352 DRM_UNLOCK(); 353 354 return retcode; 355 } 356 357 int drm_agp_free(struct drm_device *dev, struct drm_agp_buffer *request) 358 { 359 drm_agp_mem_t *entry; 360 361 if (!dev->agp || !dev->agp->acquired) 362 return EINVAL; 363 364 entry = drm_agp_lookup_entry(dev, (void*)request->handle); 365 if (entry == NULL) 366 return EINVAL; 367 368 if (entry->prev) 369 entry->prev->next = entry->next; 370 else 371 dev->agp->memory = entry->next; 372 if (entry->next) 373 entry->next->prev = entry->prev; 374 375 DRM_UNLOCK(); 376 if (entry->bound) 377 drm_agp_unbind_memory(entry->handle); 378 drm_agp_free_memory(entry->handle); 379 DRM_LOCK(); 380 381 free(entry, DRM_MEM_AGPLISTS); 382 383 return 0; 384 385 } 386 387 int drm_agp_free_ioctl(struct drm_device *dev, void *data, 388 struct drm_file *file_priv) 389 { 390 struct drm_agp_buffer request; 391 int retcode; 392 393 request = *(struct drm_agp_buffer *) data; 394 395 DRM_LOCK(); 396 retcode = drm_agp_free(dev, &request); 397 DRM_UNLOCK(); 398 399 return retcode; 400 } 401 402 drm_agp_head_t * 403 drm_agp_init(struct drm_device *dev) 404 { 405 device_t agpdev; 406 drm_agp_head_t *head = NULL; 407 int agp_available = 1; 408 409 agpdev = DRM_AGP_FIND_DEVICE(); 410 if (!agpdev) 411 agp_available = 0; 412 413 DRM_DEBUG("agp_available = %d\n", agp_available); 414 415 if (agp_available) { 416 head = malloc(sizeof(*head), DRM_MEM_AGPLISTS, 417 M_NOWAIT | M_ZERO); 418 if (head == NULL) 419 return NULL; 420 head->agpdev = agpdev; 421 agp_get_info(agpdev, &head->info); 422 head->base = head->info.ai_aperture_base; 423 head->memory = NULL; 424 #if defined(__FreeBSD__) 425 DRM_INFO( 426 #elif defined(__NetBSD__) 427 aprint_normal_dev(dev->device, 428 #endif 429 "AGP at 0x%08lx %dMB\n", 430 (long)head->info.ai_aperture_base, 431 (int)(head->info.ai_aperture_size >> 20)); 432 } 433 return head; 434 } 435 436 void *drm_agp_allocate_memory(size_t pages, u32 type) 437 { 438 device_t agpdev; 439 440 agpdev = DRM_AGP_FIND_DEVICE(); 441 if (!agpdev) 442 return NULL; 443 444 return agp_alloc_memory(agpdev, type, pages << AGP_PAGE_SHIFT); 445 } 446 447 int drm_agp_free_memory(void *handle) 448 { 449 device_t agpdev; 450 451 agpdev = DRM_AGP_FIND_DEVICE(); 452 if (!agpdev || !handle) 453 return 0; 454 455 agp_free_memory(agpdev, handle); 456 return 1; 457 } 458 459 int drm_agp_bind_memory(void *handle, off_t start) 460 { 461 device_t agpdev; 462 463 agpdev = DRM_AGP_FIND_DEVICE(); 464 if (!agpdev || !handle) 465 return EINVAL; 466 467 return agp_bind_memory(agpdev, handle, start * PAGE_SIZE); 468 } 469 470 int drm_agp_unbind_memory(void *handle) 471 { 472 device_t agpdev; 473 474 agpdev = DRM_AGP_FIND_DEVICE(); 475 if (!agpdev || !handle) 476 return EINVAL; 477 478 return agp_unbind_memory(agpdev, handle); 479 } 480
Indexes created Sat Sep 20 22:09:52 GMT 2025