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
  89         reloc_page = qxl_bo_kmap_atomic_page(qdev, info->dst_bo, info->dst_offset & PAGE_MASK);
  90         *(uint64_t *)(reloc_page + (info->dst_offset & ~PAGE_MASK)) = qxl_bo_physical_address(qdev,
  91                                                                                               info->src_bo,
  92                                                                                               info->src_offset);
  93         qxl_bo_kunmap_atomic_page(qdev, info->dst_bo, reloc_page);
  94 }
  95
  96 static void
  97 apply_surf_reloc(struct qxl_device *qdev, struct qxl_reloc_info *info)
  98 {
  99         uint32_t id = 0;
 100         void *reloc_page;
 101
 102         if (info->src_bo && !info->src_bo->is_primary)
 103                 id = info->src_bo->surface_id;
 104
 105         reloc_page = qxl_bo_kmap_atomic_page(qdev, info->dst_bo, info->dst_offset & PAGE_MASK);
 106         *(uint32_t *)(reloc_page + (info->dst_offset & ~PAGE_MASK)) = id;
 107         qxl_bo_kunmap_atomic_page(qdev, info->dst_bo, reloc_page);
 108 }
 109
 110 /* return holding the reference to this object */
 111 static int qxlhw_handle_to_bo(struct drm_file *file_priv, uint64_t handle,
 112                               struct qxl_release *release, struct qxl_bo **qbo_p)
 113 {
 114         struct drm_gem_object *gobj;
 115         struct qxl_bo *qobj;
 116         int ret;
 117
 118         gobj = drm_gem_object_lookup(file_priv, handle);
 119         if (!gobj)
 120                 return -EINVAL;
 121
 122         qobj = gem_to_qxl_bo(gobj);
 123
 124         ret = qxl_release_list_add(release, qobj);
 125         drm_gem_object_put_unlocked(gobj);
 126         if (ret)
 127                 return ret;
 128
 129         *qbo_p = qobj;
 130         return 0;
 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, 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(u64_to_user_ptr(cmd->command),
 167                        cmd->command_size))
 168                 return -EFAULT;
 169
 170         reloc_info = kmalloc_array(cmd->relocs_num,
 171                                    sizeof(struct qxl_reloc_info), 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_MASK));
 186         unwritten = __copy_from_user_inatomic_nocache
 187                 (fb_cmd + sizeof(union qxl_release_info) + (release->release_offset & ~PAGE_MASK),
 188                  u64_to_user_ptr(cmd->command), cmd->command_size);
 189
 190         {
 191                 struct qxl_drawable *draw = fb_cmd;
 192
 193                 draw->mm_time = qdev->rom->mm_clock;
 194         }
 195
 196         qxl_bo_kunmap_atomic_page(qdev, cmd_bo, fb_cmd);
 197         if (unwritten) {
 198                 DRM_ERROR("got unwritten %d\n", unwritten);
 199                 ret = -EFAULT;
 200                 goto out_free_release;
 201         }
 202
 203         /* fill out reloc info structs */
 204         num_relocs = 0;
 205         for (i = 0; i < cmd->relocs_num; ++i) {
 206                 struct drm_qxl_reloc reloc;
 207                 struct drm_qxl_reloc __user *u = u64_to_user_ptr(cmd->relocs);
 208
 209                 if (copy_from_user(&reloc, u + i, sizeof(reloc))) {
 210                         ret = -EFAULT;
 211                         goto out_free_bos;
 212                 }
 213
 214                 /* add the bos to the list of bos to validate -
 215                    need to validate first then process relocs? */
 216                 if (reloc.reloc_type != QXL_RELOC_TYPE_BO && reloc.reloc_type != QXL_RELOC_TYPE_SURF) {
 217                         DRM_DEBUG("unknown reloc type %d\n", reloc.reloc_type);
 218
 219                         ret = -EINVAL;
 220                         goto out_free_bos;
 221                 }
 222                 reloc_info[i].type = reloc.reloc_type;
 223
 224                 if (reloc.dst_handle) {
 225                         ret = qxlhw_handle_to_bo(file_priv, reloc.dst_handle, release,
 226                                                  &reloc_info[i].dst_bo);
 227                         if (ret)
 228                                 goto out_free_bos;
 229                         reloc_info[i].dst_offset = reloc.dst_offset;
 230                 } else {
 231                         reloc_info[i].dst_bo = cmd_bo;
 232                         reloc_info[i].dst_offset = reloc.dst_offset + release->release_offset;
 233                 }
 234                 num_relocs++;
 235
 236                 /* reserve and validate the reloc dst bo */
 237                 if (reloc.reloc_type == QXL_RELOC_TYPE_BO || reloc.src_handle) {
 238                         ret = qxlhw_handle_to_bo(file_priv, reloc.src_handle, release,
 239                                                  &reloc_info[i].src_bo);
 240                         if (ret)
 241                                 goto out_free_bos;
 242                         reloc_info[i].src_offset = reloc.src_offset;
 243                 } else {
 244                         reloc_info[i].src_bo = NULL;
 245                         reloc_info[i].src_offset = 0;
 246                 }
 247         }
 248
 249         /* validate all buffers */
 250         ret = qxl_release_reserve_list(release, false);
 251         if (ret)
 252                 goto out_free_bos;
 253
 254         for (i = 0; i < cmd->relocs_num; ++i) {
 255                 if (reloc_info[i].type == QXL_RELOC_TYPE_BO)
 256                         apply_reloc(qdev, &reloc_info[i]);
 257                 else if (reloc_info[i].type == QXL_RELOC_TYPE_SURF)
 258                         apply_surf_reloc(qdev, &reloc_info[i]);
 259         }
 260
 261         ret = qxl_push_command_ring_release(qdev, release, cmd->type, true);
 262         if (ret)
 263                 qxl_release_backoff_reserve_list(release);
 264         else
 265                 qxl_release_fence_buffer_objects(release);
 266
 267 out_free_bos:
 268 out_free_release:
 269         if (ret)
 270                 qxl_release_free(qdev, release);
 271 out_free_reloc:
 272         kfree(reloc_info);
 273         return ret;
 274 }
 275
 276 static int qxl_execbuffer_ioctl(struct drm_device *dev, void *data,
 277                                 struct drm_file *file_priv)
 278 {
 279         struct qxl_device *qdev = dev->dev_private;
 280         struct drm_qxl_execbuffer *execbuffer = data;
 281         struct drm_qxl_command user_cmd;
 282         int cmd_num;
 283         int ret;
 284
 285         for (cmd_num = 0; cmd_num < execbuffer->commands_num; ++cmd_num) {
 286
 287                 struct drm_qxl_command __user *commands =
 288                         u64_to_user_ptr(execbuffer->commands);
 289
 290                 if (copy_from_user(&user_cmd, commands + cmd_num,
 291                                        sizeof(user_cmd)))
 292                         return -EFAULT;
 293
 294                 ret = qxl_process_single_command(qdev, &user_cmd, file_priv);
 295                 if (ret)
 296                         return ret;
 297         }
 298         return 0;
 299 }
 300
 301 static int qxl_update_area_ioctl(struct drm_device *dev, void *data,
 302                                  struct drm_file *file)
 303 {
 304         struct qxl_device *qdev = dev->dev_private;
 305         struct drm_qxl_update_area *update_area = data;
 306         struct qxl_rect area = {.left = update_area->left,
 307                                 .top = update_area->top,
 308                                 .right = update_area->right,
 309                                 .bottom = update_area->bottom};
 310         int ret;
 311         struct drm_gem_object *gobj = NULL;
 312         struct qxl_bo *qobj = NULL;
 313         struct ttm_operation_ctx ctx = { true, false };
 314
 315         if (update_area->left >= update_area->right ||
 316             update_area->top >= update_area->bottom)
 317                 return -EINVAL;
 318
 319         gobj = drm_gem_object_lookup(file, update_area->handle);
 320         if (gobj == NULL)
 321                 return -ENOENT;
 322
 323         qobj = gem_to_qxl_bo(gobj);
 324
 325         ret = qxl_bo_reserve(qobj, false);
 326         if (ret)
 327                 goto out;
 328
 329         if (!qobj->pin_count) {
 330                 qxl_ttm_placement_from_domain(qobj, qobj->type, false);
 331                 ret = ttm_bo_validate(&qobj->tbo, &qobj->placement, &ctx);
 332                 if (unlikely(ret))
 333                         goto out;
 334         }
 335
 336         ret = qxl_bo_check_id(qdev, qobj);
 337         if (ret)
 338                 goto out2;
 339         if (!qobj->surface_id)
 340                 DRM_ERROR("got update area for surface with no id %d\n", update_area->handle);
 341         ret = qxl_io_update_area(qdev, qobj, &area);
 342
 343 out2:
 344         qxl_bo_unreserve(qobj);
 345
 346 out:
 347         drm_gem_object_put_unlocked(gobj);
 348         return ret;
 349 }
 350
 351 static int qxl_getparam_ioctl(struct drm_device *dev, void *data,
 352                        struct drm_file *file_priv)
 353 {
 354         struct qxl_device *qdev = dev->dev_private;
 355         struct drm_qxl_getparam *param = data;
 356
 357         switch (param->param) {
 358         case QXL_PARAM_NUM_SURFACES:
 359                 param->value = qdev->rom->n_surfaces;
 360                 break;
 361         case QXL_PARAM_MAX_RELOCS:
 362                 param->value = QXL_MAX_RES;
 363                 break;
 364         default:
 365                 return -EINVAL;
 366         }
 367         return 0;
 368 }
 369
 370 static int qxl_clientcap_ioctl(struct drm_device *dev, void *data,
 371                                   struct drm_file *file_priv)
 372 {
 373         struct qxl_device *qdev = dev->dev_private;
 374         struct drm_qxl_clientcap *param = data;
 375         int byte, idx;
 376
 377         byte = param->index / 8;
 378         idx = param->index % 8;
 379
 380         if (dev->pdev->revision < 4)
 381                 return -ENOSYS;
 382
 383         if (byte >= 58)
 384                 return -ENOSYS;
 385
 386         if (qdev->rom->client_capabilities[byte] & (1 << idx))
 387                 return 0;
 388         return -ENOSYS;
 389 }
 390
 391 static int qxl_alloc_surf_ioctl(struct drm_device *dev, void *data,
 392                                 struct drm_file *file)
 393 {
 394         struct qxl_device *qdev = dev->dev_private;
 395         struct drm_qxl_alloc_surf *param = data;
 396         struct qxl_bo *qobj;
 397         int handle;
 398         int ret;
 399         int size, actual_stride;
 400         struct qxl_surface surf;
 401
 402         /* work out size allocate bo with handle */
 403         actual_stride = param->stride < 0 ? -param->stride : param->stride;
 404         size = actual_stride * param->height + actual_stride;
 405
 406         surf.format = param->format;
 407         surf.width = param->width;
 408         surf.height = param->height;
 409         surf.stride = param->stride;
 410         surf.data = 0;
 411
 412         ret = qxl_gem_object_create_with_handle(qdev, file,
 413                                                 QXL_GEM_DOMAIN_SURFACE,
 414                                                 size,
 415                                                 &surf,
 416                                                 &qobj, &handle);
 417         if (ret) {
 418                 DRM_ERROR("%s: failed to create gem ret=%d\n",
 419                           __func__, ret);
 420                 return -ENOMEM;
 421         } else
 422                 param->handle = handle;
 423         return ret;
 424 }
 425
 426 const struct drm_ioctl_desc qxl_ioctls[] = {
 427         DRM_IOCTL_DEF_DRV(QXL_ALLOC, qxl_alloc_ioctl, DRM_AUTH),
 428
 429         DRM_IOCTL_DEF_DRV(QXL_MAP, qxl_map_ioctl, DRM_AUTH),
 430
 431         DRM_IOCTL_DEF_DRV(QXL_EXECBUFFER, qxl_execbuffer_ioctl,
 432                                                         DRM_AUTH),
 433         DRM_IOCTL_DEF_DRV(QXL_UPDATE_AREA, qxl_update_area_ioctl,
 434                                                         DRM_AUTH),
 435         DRM_IOCTL_DEF_DRV(QXL_GETPARAM, qxl_getparam_ioctl,
 436                                                         DRM_AUTH),
 437         DRM_IOCTL_DEF_DRV(QXL_CLIENTCAP, qxl_clientcap_ioctl,
 438                                                         DRM_AUTH),
 439
 440         DRM_IOCTL_DEF_DRV(QXL_ALLOC_SURF, qxl_alloc_surf_ioctl,
 441                           DRM_AUTH),
 442 };
 443
 444 int qxl_max_ioctls = ARRAY_SIZE(qxl_ioctls);