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