bsd-core/drm_bufs.c

   1 /* drm_bufs.h -- Generic buffer template -*- linux-c -*-
   2  * Created: Thu Nov 23 03:10:50 2000 by gareth@valinux.com
   3  *
   4  * Copyright 1999, 2000 Precision Insight, Inc., Cedar Park, Texas.
   5  * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
   6  * All Rights Reserved.
   7  *
   8  * Permission is hereby granted, free of charge, to any person obtaining a
   9  * copy of this software and associated documentation files (the "Software"),
  10  * to deal in the Software without restriction, including without limitation
  11  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  12  * and/or sell copies of the Software, and to permit persons to whom the
  13  * Software is furnished to do so, subject to the following conditions:
  14  *
  15  * The above copyright notice and this permission notice (including the next
  16  * paragraph) shall be included in all copies or substantial portions of the
  17  * Software.
  18  *
  19  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  20  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  21  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  22  * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
  23  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  24  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  25  * OTHER DEALINGS IN THE SOFTWARE.
  26  *
  27  * Authors:
  28  *    Rickard E. (Rik) Faith <faith@valinux.com>
  29  *    Gareth Hughes <gareth@valinux.com>
  30  *
  31  */
  32
  33 #include "drmP.h"
  34
  35 /*
  36  * Compute order.  Can be made faster.
  37  */
  38 int drm_order(unsigned long size)
  39 {
  40         int order;
  41         unsigned long tmp;
  42
  43         for ( order = 0, tmp = size ; tmp >>= 1 ; ++order );
  44
  45         if ( size & ~(1 << order) )
  46                 ++order;
  47
  48         return order;
  49 }
  50
  51 int drm_addmap(DRM_IOCTL_ARGS)
  52 {
  53         DRM_DEVICE;
  54         drm_map_t request;
  55         drm_local_map_t *map;
  56         drm_map_list_entry_t *list;
  57
  58         if (!(dev->flags & (FREAD|FWRITE)))
  59                 return DRM_ERR(EACCES); /* Require read/write */
  60
  61         DRM_COPY_FROM_USER_IOCTL( request, (drm_map_t *)data, sizeof(drm_map_t) );
  62
  63         map = (drm_local_map_t *) drm_alloc(sizeof(*map), DRM_MEM_MAPS);
  64         if ( !map )
  65                 return DRM_ERR(ENOMEM);
  66
  67         map->offset = request.offset;
  68         map->size = request.size;
  69         map->type = request.type;
  70         map->flags = request.flags;
  71         map->mtrr = 0;
  72         map->handle = 0;
  73
  74         /* Only allow shared memory to be removable since we only keep enough
  75          * book keeping information about shared memory to allow for removal
  76          * when processes fork.
  77          */
  78         if ( (map->flags & _DRM_REMOVABLE) && map->type != _DRM_SHM ) {
  79                 drm_free(map, sizeof(*map), DRM_MEM_MAPS);
  80                 return DRM_ERR(EINVAL);
  81         }
  82         DRM_DEBUG( "offset = 0x%08lx, size = 0x%08lx, type = %d\n",
  83                    map->offset, map->size, map->type );
  84         if ( (map->offset & PAGE_MASK) || (map->size & PAGE_MASK) ) {
  85                 drm_free(map, sizeof(*map), DRM_MEM_MAPS);
  86                 return DRM_ERR(EINVAL);
  87         }
  88         if (map->offset + map->size < map->offset) {
  89                 drm_free(map, sizeof(*map), DRM_MEM_MAPS);
  90                 return DRM_ERR(EINVAL);
  91         }
  92
  93         switch ( map->type ) {
  94         case _DRM_REGISTERS:
  95                 drm_core_ioremap(map, dev);
  96                 if (!(map->flags & _DRM_WRITE_COMBINING))
  97                         break;
  98                 /* FALLTHROUGH */
  99         case _DRM_FRAME_BUFFER:
 100                 if (drm_mtrr_add(map->offset, map->size, DRM_MTRR_WC) == 0)
 101                         map->mtrr = 1;
 102                 break;
 103         case _DRM_SHM:
 104                 map->handle = (void *)drm_alloc(map->size, DRM_MEM_SAREA);
 105                 DRM_DEBUG( "%lu %d %p\n",
 106                            map->size, drm_order(map->size), map->handle );
 107                 if ( !map->handle ) {
 108                         drm_free(map, sizeof(*map), DRM_MEM_MAPS);
 109                         return DRM_ERR(ENOMEM);
 110                 }
 111                 map->offset = (unsigned long)map->handle;
 112                 if ( map->flags & _DRM_CONTAINS_LOCK ) {
 113                         /* Prevent a 2nd X Server from creating a 2nd lock */
 114                         DRM_LOCK();
 115                         if (dev->lock.hw_lock != NULL) {
 116                                 DRM_UNLOCK();
 117                                 drm_free(map->handle, map->size, DRM_MEM_SAREA);
 118                                 drm_free(map, sizeof(*map), DRM_MEM_MAPS);
 119                                 return DRM_ERR(EBUSY);
 120                         }
 121                         dev->lock.hw_lock = map->handle; /* Pointer to lock */
 122                         DRM_UNLOCK();
 123                 }
 124                 break;
 125         case _DRM_AGP:
 126                 map->offset += dev->agp->base;
 127                 map->mtrr   = dev->agp->mtrr; /* for getmap */
 128                 break;
 129         case _DRM_SCATTER_GATHER:
 130                 if (!dev->sg) {
 131                         drm_free(map, sizeof(*map), DRM_MEM_MAPS);
 132                         return DRM_ERR(EINVAL);
 133                 }
 134                 map->offset = map->offset + dev->sg->handle;
 135                 break;
 136
 137         default:
 138                 drm_free( map, sizeof(*map), DRM_MEM_MAPS );
 139                 return DRM_ERR(EINVAL);
 140         }
 141
 142         list = drm_calloc(1, sizeof(*list), DRM_MEM_MAPS);
 143         if (list == NULL) {
 144                 drm_free(map, sizeof(*map), DRM_MEM_MAPS);
 145                 return DRM_ERR(EINVAL);
 146         }
 147         list->map = map;
 148
 149         DRM_LOCK();
 150         TAILQ_INSERT_TAIL(dev->maplist, list, link);
 151         DRM_UNLOCK();
 152
 153         request.offset = map->offset;
 154         request.size = map->size;
 155         request.type = map->type;
 156         request.flags = map->flags;
 157         request.mtrr   = map->mtrr;
 158         request.handle = map->handle;
 159
 160         if ( request.type != _DRM_SHM ) {
 161                 request.handle = (void *)request.offset;
 162         }
 163
 164         DRM_COPY_TO_USER_IOCTL( (drm_map_t *)data, request, sizeof(drm_map_t) );
 165
 166         return 0;
 167 }
 168
 169
 170 /* Remove a map private from list and deallocate resources if the mapping
 171  * isn't in use.
 172  */
 173
 174 int drm_rmmap(DRM_IOCTL_ARGS)
 175 {
 176         DRM_DEVICE;
 177         drm_map_list_entry_t *list;
 178         drm_local_map_t *map;
 179         drm_map_t request;
 180
 181         DRM_COPY_FROM_USER_IOCTL( request, (drm_map_t *)data, sizeof(request) );
 182
 183         DRM_LOCK();
 184         TAILQ_FOREACH(list, dev->maplist, link) {
 185                 map = list->map;
 186                 if (map->handle == request.handle &&
 187                     map->flags & _DRM_REMOVABLE)
 188                         break;
 189         }
 190
 191         /* No match found. */
 192         if (list == NULL) {
 193                 DRM_UNLOCK();
 194                 return DRM_ERR(EINVAL);
 195         }
 196         TAILQ_REMOVE(dev->maplist, list, link);
 197         DRM_UNLOCK();
 198
 199         drm_free(list, sizeof(*list), DRM_MEM_MAPS);
 200
 201         switch (map->type) {
 202         case _DRM_REGISTERS:
 203         case _DRM_FRAME_BUFFER:
 204                 if (map->mtrr) {
 205                         int __unused retcode;
 206
 207                         retcode = drm_mtrr_del(map->offset, map->size,
 208                             DRM_MTRR_WC);
 209                         DRM_DEBUG("mtrr_del = %d\n", retcode);
 210                 }
 211                 drm_ioremapfree(map);
 212                 break;
 213         case _DRM_SHM:
 214                 drm_free(map->handle, map->size, DRM_MEM_SAREA);
 215                 break;
 216         case _DRM_AGP:
 217         case _DRM_SCATTER_GATHER:
 218                 break;
 219         }
 220         drm_free(map, sizeof(*map), DRM_MEM_MAPS);
 221         return 0;
 222 }
 223
 224
 225 static void drm_cleanup_buf_error(drm_device_t *dev, drm_buf_entry_t *entry)
 226 {
 227         int i;
 228
 229         if (entry->seg_count) {
 230                 for (i = 0; i < entry->seg_count; i++) {
 231                         if (entry->seglist[i] != 0)
 232                                 drm_pci_free(dev, entry->buf_size,
 233                                     (void *)entry->seglist[i],
 234                                     entry->seglist_bus[i]);
 235                 }
 236                 drm_free(entry->seglist,
 237                           entry->seg_count *
 238                           sizeof(*entry->seglist),
 239                           DRM_MEM_SEGS);
 240                 drm_free(entry->seglist_bus, entry->seg_count *
 241                           sizeof(*entry->seglist_bus), DRM_MEM_SEGS);
 242
 243                 entry->seg_count = 0;
 244         }
 245
 246         if (entry->buf_count) {
 247                 for (i = 0; i < entry->buf_count; i++) {
 248                         drm_free(entry->buflist[i].dev_private,
 249                             entry->buflist[i].dev_priv_size, DRM_MEM_BUFS);
 250                 }
 251                 drm_free(entry->buflist,
 252                           entry->buf_count *
 253                           sizeof(*entry->buflist),
 254                           DRM_MEM_BUFS);
 255
 256                 entry->buf_count = 0;
 257         }
 258 }
 259
 260 static int drm_addbufs_agp(drm_device_t *dev, drm_buf_desc_t *request)
 261 {
 262         drm_device_dma_t *dma = dev->dma;
 263         drm_buf_entry_t *entry;
 264         drm_buf_t *buf;
 265         unsigned long offset;
 266         unsigned long agp_offset;
 267         int count;
 268         int order;
 269         int size;
 270         int alignment;
 271         int page_order;
 272         int total;
 273         int byte_count;
 274         int i;
 275         drm_buf_t **temp_buflist;
 276
 277         count = request->count;
 278         order = drm_order(request->size);
 279         size = 1 << order;
 280
 281         alignment  = (request->flags & _DRM_PAGE_ALIGN)
 282                 ? round_page(size) : size;
 283         page_order = order - PAGE_SHIFT > 0 ? order - PAGE_SHIFT : 0;
 284         total = PAGE_SIZE << page_order;
 285
 286         byte_count = 0;
 287         agp_offset = dev->agp->base + request->agp_start;
 288
 289         DRM_DEBUG( "count:      %d\n",  count );
 290         DRM_DEBUG( "order:      %d\n",  order );
 291         DRM_DEBUG( "size:       %d\n",  size );
 292         DRM_DEBUG( "agp_offset: 0x%lx\n", agp_offset );
 293         DRM_DEBUG( "alignment:  %d\n",  alignment );
 294         DRM_DEBUG( "page_order: %d\n",  page_order );
 295         DRM_DEBUG( "total:      %d\n",  total );
 296
 297         entry = &dma->bufs[order];
 298
 299         entry->buflist = drm_alloc(count * sizeof(*entry->buflist),
 300                                    DRM_MEM_BUFS);
 301         if ( !entry->buflist ) {
 302                 return DRM_ERR(ENOMEM);
 303         }
 304         memset( entry->buflist, 0, count * sizeof(*entry->buflist) );
 305
 306         entry->buf_size = size;
 307         entry->page_order = page_order;
 308
 309         offset = 0;
 310
 311         while ( entry->buf_count < count ) {
 312                 buf          = &entry->buflist[entry->buf_count];
 313                 buf->idx     = dma->buf_count + entry->buf_count;
 314                 buf->total   = alignment;
 315                 buf->order   = order;
 316                 buf->used    = 0;
 317
 318                 buf->offset  = (dma->byte_count + offset);
 319                 buf->bus_address = agp_offset + offset;
 320                 buf->address = (void *)(agp_offset + offset);
 321                 buf->next    = NULL;
 322                 buf->pending = 0;
 323                 buf->filp    = NULL;
 324
 325                 buf->dev_priv_size = dev->dev_priv_size;
 326                 buf->dev_private = drm_calloc(1, buf->dev_priv_size,
 327                     DRM_MEM_BUFS);
 328                 if (buf->dev_private == NULL) {
 329                         /* Set count correctly so we free the proper amount. */
 330                         entry->buf_count = count;
 331                         drm_cleanup_buf_error(dev, entry);
 332                         return DRM_ERR(ENOMEM);
 333                 }
 334
 335                 offset += alignment;
 336                 entry->buf_count++;
 337                 byte_count += PAGE_SIZE << page_order;
 338         }
 339
 340         DRM_DEBUG( "byte_count: %d\n", byte_count );
 341
 342         temp_buflist = drm_realloc(dma->buflist,
 343                                      dma->buf_count * sizeof(*dma->buflist),
 344                                      (dma->buf_count + entry->buf_count)
 345                                      * sizeof(*dma->buflist),
 346                                      DRM_MEM_BUFS );
 347         if (temp_buflist == NULL) {
 348                 /* Free the entry because it isn't valid */
 349                 drm_cleanup_buf_error(dev, entry);
 350                 return DRM_ERR(ENOMEM);
 351         }
 352         dma->buflist = temp_buflist;
 353
 354         for ( i = 0 ; i < entry->buf_count ; i++ ) {
 355                 dma->buflist[i + dma->buf_count] = &entry->buflist[i];
 356         }
 357
 358         dma->buf_count += entry->buf_count;
 359         dma->byte_count += byte_count;
 360
 361         DRM_DEBUG( "dma->buf_count : %d\n", dma->buf_count );
 362         DRM_DEBUG( "entry->buf_count : %d\n", entry->buf_count );
 363
 364         request->count = entry->buf_count;
 365         request->size = size;
 366
 367         dma->flags = _DRM_DMA_USE_AGP;
 368
 369         return 0;
 370 }
 371
 372 static int drm_addbufs_pci(drm_device_t *dev, drm_buf_desc_t *request)
 373 {
 374         drm_device_dma_t *dma = dev->dma;
 375         int count;
 376         int order;
 377         int size;
 378         int total;
 379         int page_order;
 380         drm_buf_entry_t *entry;
 381         vm_offset_t vaddr;
 382         drm_buf_t *buf;
 383         int alignment;
 384         unsigned long offset;
 385         int i;
 386         int byte_count;
 387         int page_count;
 388         unsigned long *temp_pagelist;
 389         drm_buf_t **temp_buflist;
 390         dma_addr_t bus_addr;
 391
 392         count = request->count;
 393         order = drm_order(request->size);
 394         size = 1 << order;
 395
 396         DRM_DEBUG( "count=%d, size=%d (%d), order=%d\n",
 397                    request->count, request->size, size, order );
 398
 399         alignment = (request->flags & _DRM_PAGE_ALIGN)
 400                 ? round_page(size) : size;
 401         page_order = order - PAGE_SHIFT > 0 ? order - PAGE_SHIFT : 0;
 402         total = PAGE_SIZE << page_order;
 403
 404         entry = &dma->bufs[order];
 405
 406         entry->buflist = drm_alloc(count * sizeof(*entry->buflist),
 407             DRM_MEM_BUFS);
 408         entry->seglist = drm_alloc(count * sizeof(*entry->seglist),
 409             DRM_MEM_SEGS);
 410         entry->seglist_bus = drm_alloc(count * sizeof(*entry->seglist_bus),
 411             DRM_MEM_SEGS);
 412
 413         /* Keep the original pagelist until we know all the allocations
 414          * have succeeded
 415          */
 416         temp_pagelist = drm_alloc((dma->page_count + (count << page_order)) *
 417             sizeof(*dma->pagelist), DRM_MEM_PAGES);
 418
 419         if (entry->buflist == NULL || entry->seglist == NULL ||
 420             temp_pagelist == NULL) {
 421                 drm_free(entry->buflist, count * sizeof(*entry->buflist),
 422                     DRM_MEM_BUFS);
 423                 drm_free(entry->seglist, count * sizeof(*entry->seglist),
 424                     DRM_MEM_SEGS);
 425                 drm_free(entry->seglist_bus, count *
 426                     sizeof(*entry->seglist_bus), DRM_MEM_SEGS);
 427                 return DRM_ERR(ENOMEM);
 428         }
 429
 430         bzero(entry->buflist, count * sizeof(*entry->buflist));
 431         bzero(entry->seglist, count * sizeof(*entry->seglist));
 432
 433         memcpy(temp_pagelist, dma->pagelist, dma->page_count *
 434             sizeof(*dma->pagelist));
 435
 436         DRM_DEBUG( "pagelist: %d entries\n",
 437                    dma->page_count + (count << page_order) );
 438
 439         entry->buf_size = size;
 440         entry->page_order = page_order;
 441         byte_count = 0;
 442         page_count = 0;
 443
 444         while ( entry->buf_count < count ) {
 445                 vaddr = (vm_offset_t)drm_pci_alloc(dev, size, alignment,
 446                     0xfffffffful, &bus_addr);
 447                 if (vaddr == 0) {
 448                         /* Set count correctly so we free the proper amount. */
 449                         entry->buf_count = count;
 450                         entry->seg_count = count;
 451                         drm_cleanup_buf_error(dev, entry);
 452                         drm_free(temp_pagelist, (dma->page_count +
 453                             (count << page_order)) * sizeof(*dma->pagelist),
 454                             DRM_MEM_PAGES);
 455                         return DRM_ERR(ENOMEM);
 456                 }
 457
 458                 entry->seglist_bus[entry->seg_count] = bus_addr;
 459                 entry->seglist[entry->seg_count++] = vaddr;
 460                 for ( i = 0 ; i < (1 << page_order) ; i++ ) {
 461                         DRM_DEBUG( "page %d @ 0x%08lx\n",
 462                                    dma->page_count + page_count,
 463                                    (long)vaddr + PAGE_SIZE * i );
 464                         temp_pagelist[dma->page_count + page_count++] =
 465                             vaddr + PAGE_SIZE * i;
 466                 }
 467                 for ( offset = 0 ;
 468                       offset + size <= total && entry->buf_count < count ;
 469                       offset += alignment, ++entry->buf_count ) {
 470                         buf          = &entry->buflist[entry->buf_count];
 471                         buf->idx     = dma->buf_count + entry->buf_count;
 472                         buf->total   = alignment;
 473                         buf->order   = order;
 474                         buf->used    = 0;
 475                         buf->offset  = (dma->byte_count + byte_count + offset);
 476                         buf->address = (void *)(vaddr + offset);
 477                         buf->bus_address = bus_addr + offset;
 478                         buf->next    = NULL;
 479                         buf->pending = 0;
 480                         buf->filp    = NULL;
 481
 482                         buf->dev_priv_size = dev->dev_priv_size;
 483                         buf->dev_private = drm_alloc(buf->dev_priv_size,
 484                             DRM_MEM_BUFS);
 485                         if (buf->dev_private == NULL) {
 486                                 /* Set count correctly so we free the proper amount. */
 487                                 entry->buf_count = count;
 488                                 entry->seg_count = count;
 489                                 drm_cleanup_buf_error(dev, entry);
 490                                 drm_free(temp_pagelist, (dma->page_count +
 491                                     (count << page_order)) *
 492                                     sizeof(*dma->pagelist), DRM_MEM_PAGES );
 493                                 return DRM_ERR(ENOMEM);
 494                         }
 495                         bzero(buf->dev_private, buf->dev_priv_size);
 496
 497                         DRM_DEBUG( "buffer %d @ %p\n",
 498                                    entry->buf_count, buf->address );
 499                 }
 500                 byte_count += PAGE_SIZE << page_order;
 501         }
 502
 503         temp_buflist = drm_realloc(dma->buflist,
 504                                    dma->buf_count * sizeof(*dma->buflist),
 505                                    (dma->buf_count + entry->buf_count)
 506                                    * sizeof(*dma->buflist),
 507                                    DRM_MEM_BUFS);
 508         if (temp_buflist == NULL) {
 509                 /* Free the entry because it isn't valid */
 510                 drm_cleanup_buf_error(dev, entry);
 511                 drm_free(temp_pagelist, (dma->page_count +
 512                     (count << page_order)) * sizeof(*dma->pagelist),
 513                     DRM_MEM_PAGES);
 514                 return DRM_ERR(ENOMEM);
 515         }
 516         dma->buflist = temp_buflist;
 517
 518         for ( i = 0 ; i < entry->buf_count ; i++ ) {
 519                 dma->buflist[i + dma->buf_count] = &entry->buflist[i];
 520         }
 521
 522         /* No allocations failed, so now we can replace the orginal pagelist
 523          * with the new one.
 524          */
 525         drm_free(dma->pagelist, dma->page_count * sizeof(*dma->pagelist),
 526             DRM_MEM_PAGES);
 527         dma->pagelist = temp_pagelist;
 528
 529         dma->buf_count += entry->buf_count;
 530         dma->seg_count += entry->seg_count;
 531         dma->page_count += entry->seg_count << page_order;
 532         dma->byte_count += PAGE_SIZE * (entry->seg_count << page_order);
 533
 534         request->count = entry->buf_count;
 535         request->size = size;
 536
 537         return 0;
 538
 539 }
 540
 541 static int drm_addbufs_sg(drm_device_t *dev, drm_buf_desc_t *request)
 542 {
 543         drm_device_dma_t *dma = dev->dma;
 544         drm_buf_entry_t *entry;
 545         drm_buf_t *buf;
 546         unsigned long offset;
 547         unsigned long agp_offset;
 548         int count;
 549         int order;
 550         int size;
 551         int alignment;
 552         int page_order;
 553         int total;
 554         int byte_count;
 555         int i;
 556         drm_buf_t **temp_buflist;
 557
 558         count = request->count;
 559         order = drm_order(request->size);
 560         size = 1 << order;
 561
 562         alignment  = (request->flags & _DRM_PAGE_ALIGN)
 563                 ? round_page(size) : size;
 564         page_order = order - PAGE_SHIFT > 0 ? order - PAGE_SHIFT : 0;
 565         total = PAGE_SIZE << page_order;
 566
 567         byte_count = 0;
 568         agp_offset = request->agp_start;
 569
 570         DRM_DEBUG( "count:      %d\n",  count );
 571         DRM_DEBUG( "order:      %d\n",  order );
 572         DRM_DEBUG( "size:       %d\n",  size );
 573         DRM_DEBUG( "agp_offset: %ld\n", agp_offset );
 574         DRM_DEBUG( "alignment:  %d\n",  alignment );
 575         DRM_DEBUG( "page_order: %d\n",  page_order );
 576         DRM_DEBUG( "total:      %d\n",  total );
 577
 578         entry = &dma->bufs[order];
 579
 580         entry->buflist = drm_calloc(1, count * sizeof(*entry->buflist),
 581             DRM_MEM_BUFS);
 582         if (entry->buflist == NULL)
 583                 return DRM_ERR(ENOMEM);
 584
 585         entry->buf_size = size;
 586         entry->page_order = page_order;
 587
 588         offset = 0;
 589
 590         while ( entry->buf_count < count ) {
 591                 buf          = &entry->buflist[entry->buf_count];
 592                 buf->idx     = dma->buf_count + entry->buf_count;
 593                 buf->total   = alignment;
 594                 buf->order   = order;
 595                 buf->used    = 0;
 596
 597                 buf->offset  = (dma->byte_count + offset);
 598                 buf->bus_address = agp_offset + offset;
 599                 buf->address = (void *)(agp_offset + offset + dev->sg->handle);
 600                 buf->next    = NULL;
 601                 buf->pending = 0;
 602                 buf->filp    = NULL;
 603
 604                 buf->dev_priv_size = dev->dev_priv_size;
 605                 buf->dev_private = drm_calloc(1, buf->dev_priv_size,
 606                     DRM_MEM_BUFS);
 607                 if (buf->dev_private == NULL) {
 608                         /* Set count correctly so we free the proper amount. */
 609                         entry->buf_count = count;
 610                         drm_cleanup_buf_error(dev, entry);
 611                         return DRM_ERR(ENOMEM);
 612                 }
 613
 614                 DRM_DEBUG( "buffer %d @ %p\n",
 615                            entry->buf_count, buf->address );
 616
 617                 offset += alignment;
 618                 entry->buf_count++;
 619                 byte_count += PAGE_SIZE << page_order;
 620         }
 621
 622         DRM_DEBUG( "byte_count: %d\n", byte_count );
 623
 624         temp_buflist = drm_realloc(dma->buflist,
 625                                      dma->buf_count * sizeof(*dma->buflist),
 626                                      (dma->buf_count + entry->buf_count)
 627                                      * sizeof(*dma->buflist),
 628                                      DRM_MEM_BUFS );
 629         if (temp_buflist == NULL) {
 630                 /* Free the entry because it isn't valid */
 631                 drm_cleanup_buf_error(dev, entry);
 632                 return DRM_ERR(ENOMEM);
 633         }
 634         dma->buflist = temp_buflist;
 635
 636         for ( i = 0 ; i < entry->buf_count ; i++ ) {
 637                 dma->buflist[i + dma->buf_count] = &entry->buflist[i];
 638         }
 639
 640         dma->buf_count += entry->buf_count;
 641         dma->byte_count += byte_count;
 642
 643         DRM_DEBUG( "dma->buf_count : %d\n", dma->buf_count );
 644         DRM_DEBUG( "entry->buf_count : %d\n", entry->buf_count );
 645
 646         request->count = entry->buf_count;
 647         request->size = size;
 648
 649         dma->flags = _DRM_DMA_USE_SG;
 650
 651         return 0;
 652 }
 653
 654 int drm_addbufs(DRM_IOCTL_ARGS)
 655 {
 656         DRM_DEVICE;
 657         drm_buf_desc_t request;
 658         int err;
 659         int order;
 660
 661         DRM_COPY_FROM_USER_IOCTL( request, (drm_buf_desc_t *)data, sizeof(request) );
 662
 663         if (request.count < 0 || request.count > 4096)
 664                 return DRM_ERR(EINVAL);
 665
 666         order = drm_order(request.size);
 667         if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER)
 668                 return DRM_ERR(EINVAL);
 669
 670         DRM_SPINLOCK(&dev->dma_lock);
 671         /* No more allocations after first buffer-using ioctl. */
 672         if (dev->buf_use != 0) {
 673                 DRM_SPINUNLOCK(&dev->dma_lock);
 674                 return DRM_ERR(EBUSY);
 675         }
 676         /* No more than one allocation per order */
 677         if (dev->dma->bufs[order].buf_count != 0) {
 678                 DRM_SPINUNLOCK(&dev->dma_lock);
 679                 return DRM_ERR(ENOMEM);
 680         }
 681
 682         if ( request.flags & _DRM_AGP_BUFFER )
 683                 err = drm_addbufs_agp(dev, &request);
 684         else
 685         if ( request.flags & _DRM_SG_BUFFER )
 686                 err = drm_addbufs_sg(dev, &request);
 687         else
 688                 err = drm_addbufs_pci(dev, &request);
 689         DRM_SPINUNLOCK(&dev->dma_lock);
 690
 691         DRM_COPY_TO_USER_IOCTL((drm_buf_desc_t *)data, request, sizeof(request));
 692
 693         return err;
 694 }
 695
 696 int drm_infobufs(DRM_IOCTL_ARGS)
 697 {
 698         DRM_DEVICE;
 699         drm_device_dma_t *dma = dev->dma;
 700         drm_buf_info_t request;
 701         int i;
 702         int count;
 703         int retcode = 0;
 704
 705         DRM_COPY_FROM_USER_IOCTL( request, (drm_buf_info_t *)data, sizeof(request) );
 706
 707         DRM_SPINLOCK(&dev->dma_lock);
 708         ++dev->buf_use;         /* Can't allocate more after this call */
 709         DRM_SPINUNLOCK(&dev->dma_lock);
 710
 711         for ( i = 0, count = 0 ; i < DRM_MAX_ORDER + 1 ; i++ ) {
 712                 if ( dma->bufs[i].buf_count ) ++count;
 713         }
 714
 715         DRM_DEBUG( "count = %d\n", count );
 716
 717         if ( request.count >= count ) {
 718                 for ( i = 0, count = 0 ; i < DRM_MAX_ORDER + 1 ; i++ ) {
 719                         if ( dma->bufs[i].buf_count ) {
 720                                 drm_buf_desc_t from;
 721
 722                                 from.count = dma->bufs[i].buf_count;
 723                                 from.size = dma->bufs[i].buf_size;
 724                                 from.low_mark = dma->bufs[i].freelist.low_mark;
 725                                 from.high_mark = dma->bufs[i].freelist.high_mark;
 726
 727                                 if (DRM_COPY_TO_USER(&request.list[count], &from,
 728                                     sizeof(drm_buf_desc_t)) != 0) {
 729                                         retcode = DRM_ERR(EFAULT);
 730                                         break;
 731                                 }
 732
 733                                 DRM_DEBUG( "%d %d %d %d %d\n",
 734                                            i,
 735                                            dma->bufs[i].buf_count,
 736                                            dma->bufs[i].buf_size,
 737                                            dma->bufs[i].freelist.low_mark,
 738                                            dma->bufs[i].freelist.high_mark );
 739                                 ++count;
 740                         }
 741                 }
 742         }
 743         request.count = count;
 744
 745         DRM_COPY_TO_USER_IOCTL( (drm_buf_info_t *)data, request, sizeof(request) );
 746
 747         return retcode;
 748 }
 749
 750 int drm_markbufs(DRM_IOCTL_ARGS)
 751 {
 752         DRM_DEVICE;
 753         drm_device_dma_t *dma = dev->dma;
 754         drm_buf_desc_t request;
 755         int order;
 756
 757         DRM_COPY_FROM_USER_IOCTL( request, (drm_buf_desc_t *)data, sizeof(request) );
 758
 759         DRM_DEBUG( "%d, %d, %d\n",
 760                    request.size, request.low_mark, request.high_mark );
 761
 762
 763         order = drm_order(request.size);
 764         if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER ||
 765             request.low_mark < 0 || request.high_mark < 0) {
 766                 return DRM_ERR(EINVAL);
 767         }
 768
 769         DRM_SPINLOCK(&dev->dma_lock);
 770         if (request.low_mark > dma->bufs[order].buf_count ||
 771             request.high_mark > dma->bufs[order].buf_count) {
 772                 return DRM_ERR(EINVAL);
 773         }
 774
 775         dma->bufs[order].freelist.low_mark  = request.low_mark;
 776         dma->bufs[order].freelist.high_mark = request.high_mark;
 777         DRM_SPINUNLOCK(&dev->dma_lock);
 778
 779         return 0;
 780 }
 781
 782 int drm_freebufs(DRM_IOCTL_ARGS)
 783 {
 784         DRM_DEVICE;
 785         drm_device_dma_t *dma = dev->dma;
 786         drm_buf_free_t request;
 787         int i;
 788         int idx;
 789         drm_buf_t *buf;
 790         int retcode = 0;
 791
 792         DRM_COPY_FROM_USER_IOCTL( request, (drm_buf_free_t *)data, sizeof(request) );
 793
 794         DRM_DEBUG( "%d\n", request.count );
 795
 796         DRM_SPINLOCK(&dev->dma_lock);
 797         for ( i = 0 ; i < request.count ; i++ ) {
 798                 if (DRM_COPY_FROM_USER(&idx, &request.list[i], sizeof(idx))) {
 799                         retcode = DRM_ERR(EFAULT);
 800                         break;
 801                 }
 802                 if ( idx < 0 || idx >= dma->buf_count ) {
 803                         DRM_ERROR( "Index %d (of %d max)\n",
 804                                    idx, dma->buf_count - 1 );
 805                         retcode = DRM_ERR(EINVAL);
 806                         break;
 807                 }
 808                 buf = dma->buflist[idx];
 809                 if ( buf->filp != filp ) {
 810                         DRM_ERROR("Process %d freeing buffer not owned\n",
 811                                    DRM_CURRENTPID);
 812                         retcode = DRM_ERR(EINVAL);
 813                         break;
 814                 }
 815                 drm_free_buffer(dev, buf);
 816         }
 817         DRM_SPINUNLOCK(&dev->dma_lock);
 818
 819         return retcode;
 820 }
 821
 822 int drm_mapbufs(DRM_IOCTL_ARGS)
 823 {
 824         DRM_DEVICE;
 825         drm_device_dma_t *dma = dev->dma;
 826         int retcode = 0;
 827         const int zero = 0;
 828         vm_offset_t address;
 829         struct vmspace *vms;
 830 #ifdef __FreeBSD__
 831         vm_ooffset_t foff;
 832         vm_size_t size;
 833         vm_offset_t vaddr;
 834 #endif /* __FreeBSD__ */
 835 #ifdef __NetBSD__
 836         struct vnode *vn;
 837         vm_size_t size;
 838         vaddr_t vaddr;
 839 #endif /* __NetBSD__ */
 840
 841         drm_buf_map_t request;
 842         int i;
 843
 844         DRM_COPY_FROM_USER_IOCTL( request, (drm_buf_map_t *)data, sizeof(request) );
 845
 846 #ifdef __NetBSD__
 847         if (!vfinddev(kdev, VCHR, &vn))
 848                 return 0;       /* FIXME: Shouldn't this be EINVAL or something? */
 849 #endif /* __NetBSD__ */
 850
 851 #if defined(__FreeBSD__) && __FreeBSD_version >= 500000
 852         vms = p->td_proc->p_vmspace;
 853 #else
 854         vms = p->p_vmspace;
 855 #endif
 856
 857         DRM_SPINLOCK(&dev->dma_lock);
 858         dev->buf_use++;         /* Can't allocate more after this call */
 859         DRM_SPINUNLOCK(&dev->dma_lock);
 860
 861         if (request.count < dma->buf_count)
 862                 goto done;
 863
 864         if ((dev->use_agp && (dma->flags & _DRM_DMA_USE_AGP)) ||
 865             (dev->use_sg && (dma->flags & _DRM_DMA_USE_SG))) {
 866                 drm_local_map_t *map = dev->agp_buffer_map;
 867
 868                 if (map == NULL) {
 869                         retcode = EINVAL;
 870                         goto done;
 871                 }
 872                 size = round_page(map->size);
 873                 foff = map->offset;
 874         } else {
 875                 size = round_page(dma->byte_count),
 876                 foff = 0;
 877         }
 878
 879 #ifdef __FreeBSD__
 880         vaddr = round_page((vm_offset_t)vms->vm_daddr + MAXDSIZ);
 881         retcode = vm_mmap(&vms->vm_map, &vaddr, size, PROT_READ | PROT_WRITE,
 882             VM_PROT_ALL, MAP_SHARED, SLIST_FIRST(&kdev->si_hlist), foff );
 883 #elif defined(__NetBSD__)
 884         vaddr = round_page((vaddr_t)vms->vm_daddr + MAXDSIZ);
 885         retcode = uvm_mmap(&vms->vm_map, &vaddr, size,
 886             UVM_PROT_READ | UVM_PROT_WRITE, UVM_PROT_ALL, MAP_SHARED,
 887             &vn->v_uobj, foff, p->p_rlimit[RLIMIT_MEMLOCK].rlim_cur);
 888 #endif /* __NetBSD__ */
 889         if (retcode)
 890                 goto done;
 891
 892         request.virtual = (void *)vaddr;
 893
 894         for ( i = 0 ; i < dma->buf_count ; i++ ) {
 895                 if (DRM_COPY_TO_USER(&request.list[i].idx,
 896                     &dma->buflist[i]->idx, sizeof(request.list[0].idx))) {
 897                         retcode = EFAULT;
 898                         goto done;
 899                 }
 900                 if (DRM_COPY_TO_USER(&request.list[i].total,
 901                     &dma->buflist[i]->total, sizeof(request.list[0].total))) {
 902                         retcode = EFAULT;
 903                         goto done;
 904                 }
 905                 if (DRM_COPY_TO_USER(&request.list[i].used, &zero,
 906                     sizeof(zero))) {
 907                         retcode = EFAULT;
 908                         goto done;
 909                 }
 910                 address = vaddr + dma->buflist[i]->offset; /* *** */
 911                 if (DRM_COPY_TO_USER(&request.list[i].address, &address,
 912                     sizeof(address))) {
 913                         retcode = EFAULT;
 914                         goto done;
 915                 }
 916         }
 917
 918  done:
 919         request.count = dma->buf_count;
 920
 921         DRM_DEBUG( "%d buffers, retcode = %d\n", request.count, retcode );
 922
 923         DRM_COPY_TO_USER_IOCTL((drm_buf_map_t *)data, request, sizeof(request));
 924
 925         return DRM_ERR(retcode);
 926 }