sys/dev/drm/drm_agpsupport.c

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