1235783Skib/*- 2235783Skib * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas. 3235783Skib * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California. 4235783Skib * All Rights Reserved. 5235783Skib * 6235783Skib * Permission is hereby granted, free of charge, to any person obtaining a 7235783Skib * copy of this software and associated documentation files (the "Software"), 8235783Skib * to deal in the Software without restriction, including without limitation 9235783Skib * the rights to use, copy, modify, merge, publish, distribute, sublicense, 10235783Skib * and/or sell copies of the Software, and to permit persons to whom the 11235783Skib * Software is furnished to do so, subject to the following conditions: 12235783Skib * 13235783Skib * The above copyright notice and this permission notice (including the next 14235783Skib * paragraph) shall be included in all copies or substantial portions of the 15235783Skib * Software. 16235783Skib * 17235783Skib * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 18235783Skib * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 19235783Skib * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 20235783Skib * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR 21235783Skib * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 22235783Skib * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 23235783Skib * OTHER DEALINGS IN THE SOFTWARE. 24235783Skib * 25235783Skib * Author: 26235783Skib * Rickard E. (Rik) Faith <faith@valinux.com> 27235783Skib * Gareth Hughes <gareth@valinux.com> 28235783Skib * 29235783Skib */ 30235783Skib 31235783Skib#include <sys/cdefs.h> 32235783Skib__FBSDID("$FreeBSD$"); 33235783Skib 34235783Skib/** @file drm_agpsupport.c 35235783Skib * Support code for tying the kernel AGP support to DRM drivers and 36235783Skib * the DRM's AGP ioctls. 37235783Skib */ 38235783Skib 39235783Skib#include <dev/drm2/drmP.h> 40235783Skib 41235783Skib#include <dev/agp/agpreg.h> 42235783Skib#include <dev/pci/pcireg.h> 43235783Skib 44235783Skib/* Returns 1 if AGP or 0 if not. */ 45235783Skibstatic int 46235783Skibdrm_device_find_capability(struct drm_device *dev, int cap) 47235783Skib{ 48235783Skib 49235783Skib return (pci_find_cap(dev->device, cap, NULL) == 0); 50235783Skib} 51235783Skib 52235783Skibint drm_device_is_agp(struct drm_device *dev) 53235783Skib{ 54235783Skib if (dev->driver->device_is_agp != NULL) { 55235783Skib int ret; 56235783Skib 57235783Skib /* device_is_agp returns a tristate, 0 = not AGP, 1 = definitely 58235783Skib * AGP, 2 = fall back to PCI capability 59235783Skib */ 60235783Skib ret = (*dev->driver->device_is_agp)(dev); 61235783Skib if (ret != DRM_MIGHT_BE_AGP) 62235783Skib return ret; 63235783Skib } 64235783Skib 65235783Skib return (drm_device_find_capability(dev, PCIY_AGP)); 66235783Skib} 67235783Skib 68235783Skibint drm_device_is_pcie(struct drm_device *dev) 69235783Skib{ 70235783Skib return (drm_device_find_capability(dev, PCIY_EXPRESS)); 71235783Skib} 72235783Skib 73235783Skibint drm_agp_info(struct drm_device * dev, struct drm_agp_info *info) 74235783Skib{ 75235783Skib struct agp_info *kern; 76235783Skib 77235783Skib if (!dev->agp || !dev->agp->acquired) 78235783Skib return EINVAL; 79235783Skib 80235783Skib kern = &dev->agp->info; 81235783Skib agp_get_info(dev->agp->agpdev, kern); 82235783Skib info->agp_version_major = 1; 83235783Skib info->agp_version_minor = 0; 84235783Skib info->mode = kern->ai_mode; 85235783Skib info->aperture_base = kern->ai_aperture_base; 86235783Skib info->aperture_size = kern->ai_aperture_size; 87235783Skib info->memory_allowed = kern->ai_memory_allowed; 88235783Skib info->memory_used = kern->ai_memory_used; 89235783Skib info->id_vendor = kern->ai_devid & 0xffff; 90235783Skib info->id_device = kern->ai_devid >> 16; 91235783Skib 92235783Skib return 0; 93235783Skib} 94235783Skib 95235783Skibint drm_agp_info_ioctl(struct drm_device *dev, void *data, 96235783Skib struct drm_file *file_priv) 97235783Skib{ 98235783Skib int err; 99235783Skib struct drm_agp_info info; 100235783Skib 101235783Skib err = drm_agp_info(dev, &info); 102235783Skib if (err != 0) 103235783Skib return err; 104235783Skib 105235783Skib *(struct drm_agp_info *) data = info; 106235783Skib return 0; 107235783Skib} 108235783Skib 109235783Skibint drm_agp_acquire_ioctl(struct drm_device *dev, void *data, 110235783Skib struct drm_file *file_priv) 111235783Skib{ 112235783Skib 113235783Skib return drm_agp_acquire(dev); 114235783Skib} 115235783Skib 116235783Skibint drm_agp_acquire(struct drm_device *dev) 117235783Skib{ 118235783Skib int retcode; 119235783Skib 120235783Skib if (!dev->agp || dev->agp->acquired) 121235783Skib return EINVAL; 122235783Skib 123235783Skib retcode = agp_acquire(dev->agp->agpdev); 124235783Skib if (retcode) 125235783Skib return retcode; 126235783Skib 127235783Skib dev->agp->acquired = 1; 128235783Skib return 0; 129235783Skib} 130235783Skib 131235783Skibint drm_agp_release_ioctl(struct drm_device *dev, void *data, 132235783Skib struct drm_file *file_priv) 133235783Skib{ 134235783Skib 135235783Skib return drm_agp_release(dev); 136235783Skib} 137235783Skib 138235783Skibint drm_agp_release(struct drm_device * dev) 139235783Skib{ 140235783Skib if (!dev->agp || !dev->agp->acquired) 141235783Skib return EINVAL; 142235783Skib agp_release(dev->agp->agpdev); 143235783Skib dev->agp->acquired = 0; 144235783Skib return 0; 145235783Skib} 146235783Skib 147235783Skibint drm_agp_enable(struct drm_device *dev, struct drm_agp_mode mode) 148235783Skib{ 149235783Skib 150235783Skib if (!dev->agp || !dev->agp->acquired) 151235783Skib return EINVAL; 152235783Skib 153235783Skib dev->agp->mode = mode.mode; 154235783Skib agp_enable(dev->agp->agpdev, mode.mode); 155235783Skib dev->agp->enabled = 1; 156235783Skib return 0; 157235783Skib} 158235783Skib 159235783Skibint drm_agp_enable_ioctl(struct drm_device *dev, void *data, 160235783Skib struct drm_file *file_priv) 161235783Skib{ 162235783Skib struct drm_agp_mode mode; 163235783Skib 164235783Skib mode = *(struct drm_agp_mode *) data; 165235783Skib 166235783Skib return drm_agp_enable(dev, mode); 167235783Skib} 168235783Skib 169235783Skibint drm_agp_alloc(struct drm_device *dev, struct drm_agp_buffer *request) 170235783Skib{ 171235783Skib drm_agp_mem_t *entry; 172235783Skib void *handle; 173235783Skib unsigned long pages; 174235783Skib u_int32_t type; 175235783Skib struct agp_memory_info info; 176235783Skib 177235783Skib if (!dev->agp || !dev->agp->acquired) 178235783Skib return EINVAL; 179235783Skib 180235783Skib entry = malloc(sizeof(*entry), DRM_MEM_AGPLISTS, M_NOWAIT | M_ZERO); 181235783Skib if (entry == NULL) 182235783Skib return ENOMEM; 183235783Skib 184235783Skib pages = (request->size + PAGE_SIZE - 1) / PAGE_SIZE; 185235783Skib type = (u_int32_t) request->type; 186235783Skib 187235783Skib DRM_UNLOCK(dev); 188235783Skib handle = drm_agp_allocate_memory(pages, type); 189235783Skib DRM_LOCK(dev); 190235783Skib if (handle == NULL) { 191235783Skib free(entry, DRM_MEM_AGPLISTS); 192235783Skib return ENOMEM; 193235783Skib } 194235783Skib 195235783Skib entry->handle = handle; 196235783Skib entry->bound = 0; 197235783Skib entry->pages = pages; 198235783Skib entry->prev = NULL; 199235783Skib entry->next = dev->agp->memory; 200235783Skib if (dev->agp->memory) 201235783Skib dev->agp->memory->prev = entry; 202235783Skib dev->agp->memory = entry; 203235783Skib 204235783Skib agp_memory_info(dev->agp->agpdev, entry->handle, &info); 205235783Skib 206235783Skib request->handle = (unsigned long) entry->handle; 207235783Skib request->physical = info.ami_physical; 208235783Skib 209235783Skib return 0; 210235783Skib} 211235783Skib 212235783Skibint drm_agp_alloc_ioctl(struct drm_device *dev, void *data, 213235783Skib struct drm_file *file_priv) 214235783Skib{ 215235783Skib struct drm_agp_buffer request; 216235783Skib int retcode; 217235783Skib 218235783Skib request = *(struct drm_agp_buffer *) data; 219235783Skib 220235783Skib DRM_LOCK(dev); 221235783Skib retcode = drm_agp_alloc(dev, &request); 222235783Skib DRM_UNLOCK(dev); 223235783Skib 224235783Skib *(struct drm_agp_buffer *) data = request; 225235783Skib 226235783Skib return retcode; 227235783Skib} 228235783Skib 229235783Skibstatic drm_agp_mem_t * drm_agp_lookup_entry(struct drm_device *dev, 230235783Skib void *handle) 231235783Skib{ 232235783Skib drm_agp_mem_t *entry; 233235783Skib 234235783Skib for (entry = dev->agp->memory; entry; entry = entry->next) { 235235783Skib if (entry->handle == handle) return entry; 236235783Skib } 237235783Skib return NULL; 238235783Skib} 239235783Skib 240235783Skibint drm_agp_unbind(struct drm_device *dev, struct drm_agp_binding *request) 241235783Skib{ 242235783Skib drm_agp_mem_t *entry; 243235783Skib int retcode; 244235783Skib 245235783Skib if (!dev->agp || !dev->agp->acquired) 246235783Skib return EINVAL; 247235783Skib 248235783Skib entry = drm_agp_lookup_entry(dev, (void *)request->handle); 249235783Skib if (entry == NULL || !entry->bound) 250235783Skib return EINVAL; 251235783Skib 252235783Skib DRM_UNLOCK(dev); 253235783Skib retcode = drm_agp_unbind_memory(entry->handle); 254235783Skib DRM_LOCK(dev); 255235783Skib 256235783Skib if (retcode == 0) 257235783Skib entry->bound = 0; 258235783Skib 259235783Skib return retcode; 260235783Skib} 261235783Skib 262235783Skibint drm_agp_unbind_ioctl(struct drm_device *dev, void *data, 263235783Skib struct drm_file *file_priv) 264235783Skib{ 265235783Skib struct drm_agp_binding request; 266235783Skib int retcode; 267235783Skib 268235783Skib request = *(struct drm_agp_binding *) data; 269235783Skib 270235783Skib DRM_LOCK(dev); 271235783Skib retcode = drm_agp_unbind(dev, &request); 272235783Skib DRM_UNLOCK(dev); 273235783Skib 274235783Skib return retcode; 275235783Skib} 276235783Skib 277235783Skibint drm_agp_bind(struct drm_device *dev, struct drm_agp_binding *request) 278235783Skib{ 279235783Skib drm_agp_mem_t *entry; 280235783Skib int retcode; 281235783Skib int page; 282235783Skib 283235783Skib if (!dev->agp || !dev->agp->acquired) 284235783Skib return EINVAL; 285235783Skib 286235783Skib DRM_DEBUG("agp_bind, page_size=%x\n", (int)PAGE_SIZE); 287235783Skib 288235783Skib entry = drm_agp_lookup_entry(dev, (void *)request->handle); 289235783Skib if (entry == NULL || entry->bound) 290235783Skib return EINVAL; 291235783Skib 292235783Skib page = (request->offset + PAGE_SIZE - 1) / PAGE_SIZE; 293235783Skib 294235783Skib DRM_UNLOCK(dev); 295235783Skib retcode = drm_agp_bind_memory(entry->handle, page); 296235783Skib DRM_LOCK(dev); 297235783Skib if (retcode == 0) 298235783Skib entry->bound = dev->agp->base + (page << PAGE_SHIFT); 299235783Skib 300235783Skib return retcode; 301235783Skib} 302235783Skib 303235783Skibint drm_agp_bind_ioctl(struct drm_device *dev, void *data, 304235783Skib struct drm_file *file_priv) 305235783Skib{ 306235783Skib struct drm_agp_binding request; 307235783Skib int retcode; 308235783Skib 309235783Skib request = *(struct drm_agp_binding *) data; 310235783Skib 311235783Skib DRM_LOCK(dev); 312235783Skib retcode = drm_agp_bind(dev, &request); 313235783Skib DRM_UNLOCK(dev); 314235783Skib 315235783Skib return retcode; 316235783Skib} 317235783Skib 318235783Skibint drm_agp_free(struct drm_device *dev, struct drm_agp_buffer *request) 319235783Skib{ 320235783Skib drm_agp_mem_t *entry; 321235783Skib 322235783Skib if (!dev->agp || !dev->agp->acquired) 323235783Skib return EINVAL; 324235783Skib 325235783Skib entry = drm_agp_lookup_entry(dev, (void*)request->handle); 326235783Skib if (entry == NULL) 327235783Skib return EINVAL; 328235783Skib 329235783Skib if (entry->prev) 330235783Skib entry->prev->next = entry->next; 331235783Skib else 332235783Skib dev->agp->memory = entry->next; 333235783Skib if (entry->next) 334235783Skib entry->next->prev = entry->prev; 335235783Skib 336235783Skib DRM_UNLOCK(dev); 337235783Skib if (entry->bound) 338235783Skib drm_agp_unbind_memory(entry->handle); 339235783Skib drm_agp_free_memory(entry->handle); 340235783Skib DRM_LOCK(dev); 341235783Skib 342235783Skib free(entry, DRM_MEM_AGPLISTS); 343235783Skib 344235783Skib return 0; 345235783Skib 346235783Skib} 347235783Skib 348235783Skibint drm_agp_free_ioctl(struct drm_device *dev, void *data, 349235783Skib struct drm_file *file_priv) 350235783Skib{ 351235783Skib struct drm_agp_buffer request; 352235783Skib int retcode; 353235783Skib 354235783Skib request = *(struct drm_agp_buffer *) data; 355235783Skib 356235783Skib DRM_LOCK(dev); 357235783Skib retcode = drm_agp_free(dev, &request); 358235783Skib DRM_UNLOCK(dev); 359235783Skib 360235783Skib return retcode; 361235783Skib} 362235783Skib 363235783Skibdrm_agp_head_t *drm_agp_init(void) 364235783Skib{ 365235783Skib device_t agpdev; 366235783Skib drm_agp_head_t *head = NULL; 367235783Skib int agp_available = 1; 368235783Skib 369235783Skib agpdev = DRM_AGP_FIND_DEVICE(); 370235783Skib if (!agpdev) 371235783Skib agp_available = 0; 372235783Skib 373235783Skib DRM_DEBUG("agp_available = %d\n", agp_available); 374235783Skib 375235783Skib if (agp_available) { 376235783Skib head = malloc(sizeof(*head), DRM_MEM_AGPLISTS, 377235783Skib M_NOWAIT | M_ZERO); 378235783Skib if (head == NULL) 379235783Skib return NULL; 380235783Skib head->agpdev = agpdev; 381235783Skib agp_get_info(agpdev, &head->info); 382235783Skib head->base = head->info.ai_aperture_base; 383235783Skib head->memory = NULL; 384235783Skib DRM_INFO("AGP at 0x%08lx %dMB\n", 385235783Skib (long)head->info.ai_aperture_base, 386235783Skib (int)(head->info.ai_aperture_size >> 20)); 387235783Skib } 388235783Skib return head; 389235783Skib} 390235783Skib 391235783Skibvoid *drm_agp_allocate_memory(size_t pages, u32 type) 392235783Skib{ 393235783Skib device_t agpdev; 394235783Skib 395235783Skib agpdev = DRM_AGP_FIND_DEVICE(); 396235783Skib if (!agpdev) 397235783Skib return NULL; 398235783Skib 399235783Skib return agp_alloc_memory(agpdev, type, pages << AGP_PAGE_SHIFT); 400235783Skib} 401235783Skib 402235783Skibint drm_agp_free_memory(void *handle) 403235783Skib{ 404235783Skib device_t agpdev; 405235783Skib 406235783Skib agpdev = DRM_AGP_FIND_DEVICE(); 407235783Skib if (!agpdev || !handle) 408235783Skib return 0; 409235783Skib 410235783Skib agp_free_memory(agpdev, handle); 411235783Skib return 1; 412235783Skib} 413235783Skib 414235783Skibint drm_agp_bind_memory(void *handle, off_t start) 415235783Skib{ 416235783Skib device_t agpdev; 417235783Skib 418235783Skib agpdev = DRM_AGP_FIND_DEVICE(); 419235783Skib if (!agpdev || !handle) 420235783Skib return EINVAL; 421235783Skib 422235783Skib return agp_bind_memory(agpdev, handle, start * PAGE_SIZE); 423235783Skib} 424235783Skib 425235783Skibint drm_agp_unbind_memory(void *handle) 426235783Skib{ 427235783Skib device_t agpdev; 428235783Skib 429235783Skib agpdev = DRM_AGP_FIND_DEVICE(); 430235783Skib if (!agpdev || !handle) 431235783Skib return EINVAL; 432235783Skib 433235783Skib return agp_unbind_memory(agpdev, handle); 434235783Skib} 435