kernel/drivers/gpu/drm/qxl/qxl_ioctl.c

   1 /*
   2  * Copyright 2013 Red Hat Inc.
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice shall be included in
  12  * all copies or substantial portions of the Software.
  13  *
  14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  17  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
  18  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  19  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  20  * OTHER DEALINGS IN THE SOFTWARE.
  21  *
  22  * Authors: Dave Airlie
  23  *          Alon Levy
  24  */
  25
  26 #include "qxl_drv.h"
  27 #include "qxl_object.h"
  28
  29 /*
  30  * TODO: allocating a new gem(in qxl_bo) for each request.
  31  * This is wasteful since bo's are page aligned.
  32  */
  33 static int qxl_alloc_ioctl(struct drm_device *dev, void *data,
  34                            struct drm_file *file_priv)
  35 {
  36         struct qxl_device *qdev = dev->dev_private;
  37         struct drm_qxl_alloc *qxl_alloc = data;
  38         int ret;
  39         struct qxl_bo *qobj;
  40         uint32_t handle;
  41         u32 domain = QXL_GEM_DOMAIN_VRAM;
  42
  43         if (qxl_alloc->size == 0) {
  44                 DRM_ERROR("invalid size %d\n", qxl_alloc->size);
  45                 return -EINVAL;
  46         }
  47         ret = qxl_gem_object_create_with_handle(qdev, file_priv,
  48                                                 domain,
  49                                                 qxl_alloc->size,
  50                                                 NULL,
  51                                                 &qobj, &handle);
  52         if (ret) {
  53                 DRM_ERROR("%s: failed to create gem ret=%d\n",
  54                           __func__, ret);
  55                 return -ENOMEM;
  56         }
  57         qxl_alloc->handle = handle;
  58         return 0;
  59 }
  60
  61 static int qxl_map_ioctl(struct drm_device *dev, void *data,
  62                          struct drm_file *file_priv)
  63 {
  64         struct qxl_device *qdev = dev->dev_private;
  65         struct drm_qxl_map *qxl_map = data;
  66
  67         return qxl_mode_dumb_mmap(file_priv, qdev->ddev, qxl_map->handle,
  68                                   &qxl_map->offset);
  69 }
  70
  71 struct qxl_reloc_info {
  72         int type;
  73         struct qxl_bo *dst_bo;
  74         uint32_t dst_offset;
  75         struct qxl_bo *src_bo;
  76         int src_offset;
  77 };
  78
  79 /*
  80  * dst must be validated, i.e. whole bo on vram/surfacesram (right now all bo's
  81  * are on vram).
  82  * *(dst + dst_off) = qxl_bo_physical_address(src, src_off)
  83  */
  84 static void
  85 apply_reloc(struct qxl_device *qdev, struct qxl_reloc_info *info)
  86 {
  87         void *reloc_page;
  88         reloc_page = qxl_bo_kmap_atomic_page(qdev, info->dst_bo, info->dst_offset & PAGE_MASK);
  89         *(uint64_t *)(reloc_page + (info->dst_offset & ~PAGE_MASK)) = qxl_bo_physical_address(qdev,
  90                                                                                               info->src_bo,
  91                                                                                               info->src_offset);
  92         qxl_bo_kunmap_atomic_page(qdev, info->dst_bo, reloc_page);
  93 }
  94
  95 static void
  96 apply_surf_reloc(struct qxl_device *qdev, struct qxl_reloc_info *info)
  97 {
  98         uint32_t id = 0;
  99         void *reloc_page;
 100
 101         if (info->src_bo && !info->src_bo->is_primary)
 102                 id = info->src_bo->surface_id;
 103
 104         reloc_page = qxl_bo_kmap_atomic_page(qdev, info->dst_bo, info->dst_offset & PAGE_MASK);
 105         *(uint32_t *)(reloc_page + (info->dst_offset & ~PAGE_MASK)) = id;
 106         qxl_bo_kunmap_atomic_page(qdev, info->dst_bo, reloc_page);
 107 }
 108
 109 /* return holding the reference to this object */
 110 static struct qxl_bo *qxlhw_handle_to_bo(struct qxl_device *qdev,
 111                                          struct drm_file *file_priv, uint64_t handle,
 112                                          struct qxl_release *release)
 113 {
 114         struct drm_gem_object *gobj;
 115         struct qxl_bo *qobj;
 116         int ret;
 117
 118         gobj = drm_gem_object_lookup(qdev->ddev, file_priv, handle);
 119         if (!gobj)
 120                 return NULL;
 121
 122         qobj = gem_to_qxl_bo(gobj);
 123
 124         ret = qxl_release_list_add(release, qobj);
 125         if (ret) {
 126                 drm_gem_object_unreference_unlocked(gobj);
 127                 return NULL;
 128         }
 129
 130         return qobj;
 131 }
 132
 133 /*
 134  * Usage of execbuffer:
 135  * Relocations need to take into account the full QXLDrawable size.
 136  * However, the command as passed from user space must *not* contain the initial
 137  * QXLReleaseInfo struct (first XXX bytes)
 138  */
 139 static int qxl_process_single_command(struct qxl_device *qdev,
 140                                       struct drm_qxl_command *cmd,
 141                                       struct drm_file *file_priv)
 142 {
 143         struct qxl_reloc_info *reloc_info;
 144         int release_type;
 145         struct qxl_release *release;
 146         struct qxl_bo *cmd_bo;
 147         void *fb_cmd;
 148         int i, j, ret, num_relocs;
 149         int unwritten;
 150
 151         switch (cmd->type) {
 152         case QXL_CMD_DRAW:
 153                 release_type = QXL_RELEASE_DRAWABLE;
 154                 break;
 155         case QXL_CMD_SURFACE:
 156         case QXL_CMD_CURSOR:
 157         default:
 158                 DRM_DEBUG("Only draw commands in execbuffers\n");
 159                 return -EINVAL;
 160                 break;
 161         }
 162
 163         if (cmd->command_size > PAGE_SIZE - sizeof(union qxl_release_info))
 164                 return -EINVAL;
 165
 166         if (!access_ok(VERIFY_READ,
 167                        (void *)(unsigned long)cmd->command,
 168                        cmd->command_size))
 169                 return -EFAULT;
 170
 171         reloc_info = kmalloc(sizeof(struct qxl_reloc_info) * cmd->relocs_num, GFP_KERNEL);
 172         if (!reloc_info)
 173                 return -ENOMEM;
 174
 175         ret = qxl_alloc_release_reserved(qdev,
 176                                          sizeof(union qxl_release_info) +
 177                                          cmd->command_size,
 178                                          release_type,
 179                                          &release,
 180                                          &cmd_bo);
 181         if (ret)
 182                 goto out_free_reloc;
 183
 184         /* TODO copy slow path code from i915 */
 185         fb_cmd = qxl_bo_kmap_atomic_page(qdev, cmd_bo, (release->release_offset & PAGE_SIZE));
 186         unwritten = __copy_from_user_inatomic_nocache(fb_cmd + sizeof(union qxl_release_info) + (release->release_offset & ~PAGE_SIZE), (void *)(unsigned long)cmd->command, cmd->command_size);
 187
 188         {
 189                 struct qxl_drawable *draw = fb_cmd;
 190                 draw->mm_time = qdev->rom->mm_clock;
 191         }
 192
 193         qxl_bo_kunmap_atomic_page(qdev, cmd_bo, fb_cmd);
 194         if (unwritten) {
 195                 DRM_ERROR("got unwritten %d\n", unwritten);
 196                 ret = -EFAULT;
 197                 goto out_free_release;
 198         }
 199
 200         /* fill out reloc info structs */
 201         num_relocs = 0;
 202         for (i = 0; i < cmd->relocs_num; ++i) {
 203                 struct drm_qxl_reloc reloc;
 204
 205                 if (copy_from_user(&reloc,
 206                                        &((struct drm_qxl_reloc *)(uintptr_t)cmd->relocs)[i],
 207                                        sizeof(reloc))) {
 208                         ret = -EFAULT;
 209                         goto out_free_bos;
 210                 }
 211
 212                 /* add the bos to the list of bos to validate -
 213                    need to validate first then process relocs? */
 214                 if (reloc.reloc_type != QXL_RELOC_TYPE_BO && reloc.reloc_type != QXL_RELOC_TYPE_SURF) {
 215                         DRM_DEBUG("unknown reloc type %d\n", reloc_info[i].type);
 216
 217                         ret = -EINVAL;
 218                         goto out_free_bos;
 219                 }
 220                 reloc_info[i].type = reloc.reloc_type;
 221
 222                 if (reloc.dst_handle) {
 223                         reloc_info[i].dst_bo = qxlhw_handle_to_bo(qdev, file_priv,
 224                                                                   reloc.dst_handle, release);
 225                         if (!reloc_info[i].dst_bo) {
 226                                 ret = -EINVAL;
 227                                 reloc_info[i].src_bo = NULL;
 228                                 goto out_free_bos;
 229                         }
 230                         reloc_info[i].dst_offset = reloc.dst_offset;
 231                 } else {
 232                         reloc_info[i].dst_bo = cmd_bo;
 233                         reloc_info[i].dst_offset = reloc.dst_offset + release->release_offset;
 234                 }
 235                 num_relocs++;
 236
 237                 /* reserve and validate the reloc dst bo */
 238                 if (reloc.reloc_type == QXL_RELOC_TYPE_BO || reloc.src_handle > 0) {
 239                         reloc_info[i].src_bo =
 240                                 qxlhw_handle_to_bo(qdev, file_priv,
 241                                                    reloc.src_handle, release);
 242                         if (!reloc_info[i].src_bo) {
 243                                 if (reloc_info[i].dst_bo != cmd_bo)
 244                                         drm_gem_object_unreference_unlocked(&reloc_info[i].dst_bo->gem_base);
 245                                 ret = -EINVAL;
 246                                 goto out_free_bos;
 247                         }
 248                         reloc_info[i].src_offset = reloc.src_offset;
 249                 } else {
 250                         reloc_info[i].src_bo = NULL;
 251                         reloc_info[i].src_offset = 0;
 252                 }
 253         }
 254
 255         /* validate all buffers */
 256         ret = qxl_release_reserve_list(release, false);
 257         if (ret)
 258                 goto out_free_bos;
 259
 260         for (i = 0; i < cmd->relocs_num; ++i) {
 261                 if (reloc_info[i].type == QXL_RELOC_TYPE_BO)
 262                         apply_reloc(qdev, &reloc_info[i]);
 263                 else if (reloc_info[i].type == QXL_RELOC_TYPE_SURF)
 264                         apply_surf_reloc(qdev, &reloc_info[i]);
 265         }
 266
 267         ret = qxl_push_command_ring_release(qdev, release, cmd->type, true);
 268         if (ret)
 269                 qxl_release_backoff_reserve_list(release);
 270         else
 271                 qxl_release_fence_buffer_objects(release);
 272
 273 out_free_bos:
 274         for (j = 0; j < num_relocs; j++) {
 275                 if (reloc_info[j].dst_bo != cmd_bo)
 276                         drm_gem_object_unreference_unlocked(&reloc_info[j].dst_bo->gem_base);
 277                 if (reloc_info[j].src_bo && reloc_info[j].src_bo != cmd_bo)
 278                         drm_gem_object_unreference_unlocked(&reloc_info[j].src_bo->gem_base);
 279         }
 280 out_free_release:
 281         if (ret)
 282                 qxl_release_free(qdev, release);
 283 out_free_reloc:
 284         kfree(reloc_info);
 285         return ret;
 286 }
 287
 288 static int qxl_execbuffer_ioctl(struct drm_device *dev, void *data,
 289                                 struct drm_file *file_priv)
 290 {
 291         struct qxl_device *qdev = dev->dev_private;
 292         struct drm_qxl_execbuffer *execbuffer = data;
 293         struct drm_qxl_command user_cmd;
 294         int cmd_num;
 295         int ret;
 296
 297         for (cmd_num = 0; cmd_num < execbuffer->commands_num; ++cmd_num) {
 298
 299                 struct drm_qxl_command *commands =
 300                         (struct drm_qxl_command *)(uintptr_t)execbuffer->commands;
 301
 302                 if (copy_from_user(&user_cmd, &commands[cmd_num],
 303                                        sizeof(user_cmd)))
 304                         return -EFAULT;
 305
 306                 ret = qxl_process_single_command(qdev, &user_cmd, file_priv);
 307                 if (ret)
 308                         return ret;
 309         }
 310         return 0;
 311 }
 312
 313 static int qxl_update_area_ioctl(struct drm_device *dev, void *data,
 314                                  struct drm_file *file)
 315 {
 316         struct qxl_device *qdev = dev->dev_private;
 317         struct drm_qxl_update_area *update_area = data;
 318         struct qxl_rect area = {.left = update_area->left,
 319                                 .top = update_area->top,
 320                                 .right = update_area->right,
 321                                 .bottom = update_area->bottom};
 322         int ret;
 323         struct drm_gem_object *gobj = NULL;
 324         struct qxl_bo *qobj = NULL;
 325
 326         if (update_area->left >= update_area->right ||
 327             update_area->top >= update_area->bottom)
 328                 return -EINVAL;
 329
 330         gobj = drm_gem_object_lookup(dev, file, update_area->handle);
 331         if (gobj == NULL)
 332                 return -ENOENT;
 333
 334         qobj = gem_to_qxl_bo(gobj);
 335
 336         ret = qxl_bo_reserve(qobj, false);
 337         if (ret)
 338                 goto out;
 339
 340         if (!qobj->pin_count) {
 341                 qxl_ttm_placement_from_domain(qobj, qobj->type, false);
 342                 ret = ttm_bo_validate(&qobj->tbo, &qobj->placement,
 343                                       true, false);
 344                 if (unlikely(ret))
 345                         goto out;
 346         }
 347
 348         ret = qxl_bo_check_id(qdev, qobj);
 349         if (ret)
 350                 goto out2;
 351         if (!qobj->surface_id)
 352                 DRM_ERROR("got update area for surface with no id %d\n", update_area->handle);
 353         ret = qxl_io_update_area(qdev, qobj, &area);
 354
 355 out2:
 356         qxl_bo_unreserve(qobj);
 357
 358 out:
 359         drm_gem_object_unreference_unlocked(gobj);
 360         return ret;
 361 }
 362
 363 static int qxl_getparam_ioctl(struct drm_device *dev, void *data,
 364                        struct drm_file *file_priv)
 365 {
 366         struct qxl_device *qdev = dev->dev_private;
 367         struct drm_qxl_getparam *param = data;
 368
 369         switch (param->param) {
 370         case QXL_PARAM_NUM_SURFACES:
 371                 param->value = qdev->rom->n_surfaces;
 372                 break;
 373         case QXL_PARAM_MAX_RELOCS:
 374                 param->value = QXL_MAX_RES;
 375                 break;
 376         default:
 377                 return -EINVAL;
 378         }
 379         return 0;
 380 }
 381
 382 static int qxl_clientcap_ioctl(struct drm_device *dev, void *data,
 383                                   struct drm_file *file_priv)
 384 {
 385         struct qxl_device *qdev = dev->dev_private;
 386         struct drm_qxl_clientcap *param = data;
 387         int byte, idx;
 388
 389         byte = param->index / 8;
 390         idx = param->index % 8;
 391
 392         if (qdev->pdev->revision < 4)
 393                 return -ENOSYS;
 394
 395         if (byte >= 58)
 396                 return -ENOSYS;
 397
 398         if (qdev->rom->client_capabilities[byte] & (1 << idx))
 399                 return 0;
 400         return -ENOSYS;
 401 }
 402
 403 static int qxl_alloc_surf_ioctl(struct drm_device *dev, void *data,
 404                                 struct drm_file *file)
 405 {
 406         struct qxl_device *qdev = dev->dev_private;
 407         struct drm_qxl_alloc_surf *param = data;
 408         struct qxl_bo *qobj;
 409         int handle;
 410         int ret;
 411         int size, actual_stride;
 412         struct qxl_surface surf;
 413
 414         /* work out size allocate bo with handle */
 415         actual_stride = param->stride < 0 ? -param->stride : param->stride;
 416         size = actual_stride * param->height + actual_stride;
 417
 418         surf.format = param->format;
 419         surf.width = param->width;
 420         surf.height = param->height;
 421         surf.stride = param->stride;
 422         surf.data = 0;
 423
 424         ret = qxl_gem_object_create_with_handle(qdev, file,
 425                                                 QXL_GEM_DOMAIN_SURFACE,
 426                                                 size,
 427                                                 &surf,
 428                                                 &qobj, &handle);
 429         if (ret) {
 430                 DRM_ERROR("%s: failed to create gem ret=%d\n",
 431                           __func__, ret);
 432                 return -ENOMEM;
 433         } else
 434                 param->handle = handle;
 435         return ret;
 436 }
 437
 438 const struct drm_ioctl_desc qxl_ioctls[] = {
 439         DRM_IOCTL_DEF_DRV(QXL_ALLOC, qxl_alloc_ioctl, DRM_AUTH|DRM_UNLOCKED),
 440
 441         DRM_IOCTL_DEF_DRV(QXL_MAP, qxl_map_ioctl, DRM_AUTH|DRM_UNLOCKED),
 442
 443         DRM_IOCTL_DEF_DRV(QXL_EXECBUFFER, qxl_execbuffer_ioctl,
 444                                                         DRM_AUTH|DRM_UNLOCKED),
 445         DRM_IOCTL_DEF_DRV(QXL_UPDATE_AREA, qxl_update_area_ioctl,
 446                                                         DRM_AUTH|DRM_UNLOCKED),
 447         DRM_IOCTL_DEF_DRV(QXL_GETPARAM, qxl_getparam_ioctl,
 448                                                         DRM_AUTH|DRM_UNLOCKED),
 449         DRM_IOCTL_DEF_DRV(QXL_CLIENTCAP, qxl_clientcap_ioctl,
 450                                                         DRM_AUTH|DRM_UNLOCKED),
 451
 452         DRM_IOCTL_DEF_DRV(QXL_ALLOC_SURF, qxl_alloc_surf_ioctl,
 453                           DRM_AUTH|DRM_UNLOCKED),
 454 };
 455
 456 int qxl_max_ioctls = ARRAY_SIZE(qxl_ioctls);