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                 return NULL;
 127
 128         return qobj;
 129 }
 130
 131 /*
 132  * Usage of execbuffer:
 133  * Relocations need to take into account the full QXLDrawable size.
 134  * However, the command as passed from user space must *not* contain the initial
 135  * QXLReleaseInfo struct (first XXX bytes)
 136  */
 137 static int qxl_process_single_command(struct qxl_device *qdev,
 138                                       struct drm_qxl_command *cmd,
 139                                       struct drm_file *file_priv)
 140 {
 141         struct qxl_reloc_info *reloc_info;
 142         int release_type;
 143         struct qxl_release *release;
 144         struct qxl_bo *cmd_bo;
 145         void *fb_cmd;
 146         int i, j, ret, num_relocs;
 147         int unwritten;
 148
 149         switch (cmd->type) {
 150         case QXL_CMD_DRAW:
 151                 release_type = QXL_RELEASE_DRAWABLE;
 152                 break;
 153         case QXL_CMD_SURFACE:
 154         case QXL_CMD_CURSOR:
 155         default:
 156                 DRM_DEBUG("Only draw commands in execbuffers\n");
 157                 return -EINVAL;
 158                 break;
 159         }
 160
 161         if (cmd->command_size > PAGE_SIZE - sizeof(union qxl_release_info))
 162                 return -EINVAL;
 163
 164         if (!access_ok(VERIFY_READ,
 165                        (void *)(unsigned long)cmd->command,
 166                        cmd->command_size))
 167                 return -EFAULT;
 168
 169         reloc_info = kmalloc(sizeof(struct qxl_reloc_info) * cmd->relocs_num, GFP_KERNEL);
 170         if (!reloc_info)
 171                 return -ENOMEM;
 172
 173         ret = qxl_alloc_release_reserved(qdev,
 174                                          sizeof(union qxl_release_info) +
 175                                          cmd->command_size,
 176                                          release_type,
 177                                          &release,
 178                                          &cmd_bo);
 179         if (ret)
 180                 goto out_free_reloc;
 181
 182         /* TODO copy slow path code from i915 */
 183         fb_cmd = qxl_bo_kmap_atomic_page(qdev, cmd_bo, (release->release_offset & PAGE_SIZE));
 184         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);
 185
 186         {
 187                 struct qxl_drawable *draw = fb_cmd;
 188                 draw->mm_time = qdev->rom->mm_clock;
 189         }
 190
 191         qxl_bo_kunmap_atomic_page(qdev, cmd_bo, fb_cmd);
 192         if (unwritten) {
 193                 DRM_ERROR("got unwritten %d\n", unwritten);
 194                 ret = -EFAULT;
 195                 goto out_free_release;
 196         }
 197
 198         /* fill out reloc info structs */
 199         num_relocs = 0;
 200         for (i = 0; i < cmd->relocs_num; ++i) {
 201                 struct drm_qxl_reloc reloc;
 202
 203                 if (copy_from_user(&reloc,
 204                                        &((struct drm_qxl_reloc *)(uintptr_t)cmd->relocs)[i],
 205                                        sizeof(reloc))) {
 206                         ret = -EFAULT;
 207                         goto out_free_bos;
 208                 }
 209
 210                 /* add the bos to the list of bos to validate -
 211                    need to validate first then process relocs? */
 212                 if (reloc.reloc_type != QXL_RELOC_TYPE_BO && reloc.reloc_type != QXL_RELOC_TYPE_SURF) {
 213                         DRM_DEBUG("unknown reloc type %d\n", reloc_info[i].type);
 214
 215                         ret = -EINVAL;
 216                         goto out_free_bos;
 217                 }
 218                 reloc_info[i].type = reloc.reloc_type;
 219
 220                 if (reloc.dst_handle) {
 221                         reloc_info[i].dst_bo = qxlhw_handle_to_bo(qdev, file_priv,
 222                                                                   reloc.dst_handle, release);
 223                         if (!reloc_info[i].dst_bo) {
 224                                 ret = -EINVAL;
 225                                 reloc_info[i].src_bo = NULL;
 226                                 goto out_free_bos;
 227                         }
 228                         reloc_info[i].dst_offset = reloc.dst_offset;
 229                 } else {
 230                         reloc_info[i].dst_bo = cmd_bo;
 231                         reloc_info[i].dst_offset = reloc.dst_offset + release->release_offset;
 232                 }
 233                 num_relocs++;
 234
 235                 /* reserve and validate the reloc dst bo */
 236                 if (reloc.reloc_type == QXL_RELOC_TYPE_BO || reloc.src_handle > 0) {
 237                         reloc_info[i].src_bo =
 238                                 qxlhw_handle_to_bo(qdev, file_priv,
 239                                                    reloc.src_handle, release);
 240                         if (!reloc_info[i].src_bo) {
 241                                 if (reloc_info[i].dst_bo != cmd_bo)
 242                                         drm_gem_object_unreference_unlocked(&reloc_info[i].dst_bo->gem_base);
 243                                 ret = -EINVAL;
 244                                 goto out_free_bos;
 245                         }
 246                         reloc_info[i].src_offset = reloc.src_offset;
 247                 } else {
 248                         reloc_info[i].src_bo = NULL;
 249                         reloc_info[i].src_offset = 0;
 250                 }
 251         }
 252
 253         /* validate all buffers */
 254         ret = qxl_release_reserve_list(release, false);
 255         if (ret)
 256                 goto out_free_bos;
 257
 258         for (i = 0; i < cmd->relocs_num; ++i) {
 259                 if (reloc_info[i].type == QXL_RELOC_TYPE_BO)
 260                         apply_reloc(qdev, &reloc_info[i]);
 261                 else if (reloc_info[i].type == QXL_RELOC_TYPE_SURF)
 262                         apply_surf_reloc(qdev, &reloc_info[i]);
 263         }
 264
 265         ret = qxl_push_command_ring_release(qdev, release, cmd->type, true);
 266         if (ret)
 267                 qxl_release_backoff_reserve_list(release);
 268         else
 269                 qxl_release_fence_buffer_objects(release);
 270
 271 out_free_bos:
 272         for (j = 0; j < num_relocs; j++) {
 273                 if (reloc_info[j].dst_bo != cmd_bo)
 274                         drm_gem_object_unreference_unlocked(&reloc_info[j].dst_bo->gem_base);
 275                 if (reloc_info[j].src_bo && reloc_info[j].src_bo != cmd_bo)
 276                         drm_gem_object_unreference_unlocked(&reloc_info[j].src_bo->gem_base);
 277         }
 278 out_free_release:
 279         if (ret)
 280                 qxl_release_free(qdev, release);
 281 out_free_reloc:
 282         kfree(reloc_info);
 283         return ret;
 284 }
 285
 286 static int qxl_execbuffer_ioctl(struct drm_device *dev, void *data,
 287                                 struct drm_file *file_priv)
 288 {
 289         struct qxl_device *qdev = dev->dev_private;
 290         struct drm_qxl_execbuffer *execbuffer = data;
 291         struct drm_qxl_command user_cmd;
 292         int cmd_num;
 293         int ret;
 294
 295         for (cmd_num = 0; cmd_num < execbuffer->commands_num; ++cmd_num) {
 296
 297                 struct drm_qxl_command *commands =
 298                         (struct drm_qxl_command *)(uintptr_t)execbuffer->commands;
 299
 300                 if (copy_from_user(&user_cmd, &commands[cmd_num],
 301                                        sizeof(user_cmd)))
 302                         return -EFAULT;
 303
 304                 ret = qxl_process_single_command(qdev, &user_cmd, file_priv);
 305                 if (ret)
 306                         return ret;
 307         }
 308         return 0;
 309 }
 310
 311 static int qxl_update_area_ioctl(struct drm_device *dev, void *data,
 312                                  struct drm_file *file)
 313 {
 314         struct qxl_device *qdev = dev->dev_private;
 315         struct drm_qxl_update_area *update_area = data;
 316         struct qxl_rect area = {.left = update_area->left,
 317                                 .top = update_area->top,
 318                                 .right = update_area->right,
 319                                 .bottom = update_area->bottom};
 320         int ret;
 321         struct drm_gem_object *gobj = NULL;
 322         struct qxl_bo *qobj = NULL;
 323
 324         if (update_area->left >= update_area->right ||
 325             update_area->top >= update_area->bottom)
 326                 return -EINVAL;
 327
 328         gobj = drm_gem_object_lookup(dev, file, update_area->handle);
 329         if (gobj == NULL)
 330                 return -ENOENT;
 331
 332         qobj = gem_to_qxl_bo(gobj);
 333
 334         ret = qxl_bo_reserve(qobj, false);
 335         if (ret)
 336                 goto out;
 337
 338         if (!qobj->pin_count) {
 339                 qxl_ttm_placement_from_domain(qobj, qobj->type, false);
 340                 ret = ttm_bo_validate(&qobj->tbo, &qobj->placement,
 341                                       true, false);
 342                 if (unlikely(ret))
 343                         goto out;
 344         }
 345
 346         ret = qxl_bo_check_id(qdev, qobj);
 347         if (ret)
 348                 goto out2;
 349         if (!qobj->surface_id)
 350                 DRM_ERROR("got update area for surface with no id %d\n", update_area->handle);
 351         ret = qxl_io_update_area(qdev, qobj, &area);
 352
 353 out2:
 354         qxl_bo_unreserve(qobj);
 355
 356 out:
 357         drm_gem_object_unreference_unlocked(gobj);
 358         return ret;
 359 }
 360
 361 static int qxl_getparam_ioctl(struct drm_device *dev, void *data,
 362                        struct drm_file *file_priv)
 363 {
 364         struct qxl_device *qdev = dev->dev_private;
 365         struct drm_qxl_getparam *param = data;
 366
 367         switch (param->param) {
 368         case QXL_PARAM_NUM_SURFACES:
 369                 param->value = qdev->rom->n_surfaces;
 370                 break;
 371         case QXL_PARAM_MAX_RELOCS:
 372                 param->value = QXL_MAX_RES;
 373                 break;
 374         default:
 375                 return -EINVAL;
 376         }
 377         return 0;
 378 }
 379
 380 static int qxl_clientcap_ioctl(struct drm_device *dev, void *data,
 381                                   struct drm_file *file_priv)
 382 {
 383         struct qxl_device *qdev = dev->dev_private;
 384         struct drm_qxl_clientcap *param = data;
 385         int byte, idx;
 386
 387         byte = param->index / 8;
 388         idx = param->index % 8;
 389
 390         if (qdev->pdev->revision < 4)
 391                 return -ENOSYS;
 392
 393         if (byte >= 58)
 394                 return -ENOSYS;
 395
 396         if (qdev->rom->client_capabilities[byte] & (1 << idx))
 397                 return 0;
 398         return -ENOSYS;
 399 }
 400
 401 static int qxl_alloc_surf_ioctl(struct drm_device *dev, void *data,
 402                                 struct drm_file *file)
 403 {
 404         struct qxl_device *qdev = dev->dev_private;
 405         struct drm_qxl_alloc_surf *param = data;
 406         struct qxl_bo *qobj;
 407         int handle;
 408         int ret;
 409         int size, actual_stride;
 410         struct qxl_surface surf;
 411
 412         /* work out size allocate bo with handle */
 413         actual_stride = param->stride < 0 ? -param->stride : param->stride;
 414         size = actual_stride * param->height + actual_stride;
 415
 416         surf.format = param->format;
 417         surf.width = param->width;
 418         surf.height = param->height;
 419         surf.stride = param->stride;
 420         surf.data = 0;
 421
 422         ret = qxl_gem_object_create_with_handle(qdev, file,
 423                                                 QXL_GEM_DOMAIN_SURFACE,
 424                                                 size,
 425                                                 &surf,
 426                                                 &qobj, &handle);
 427         if (ret) {
 428                 DRM_ERROR("%s: failed to create gem ret=%d\n",
 429                           __func__, ret);
 430                 return -ENOMEM;
 431         } else
 432                 param->handle = handle;
 433         return ret;
 434 }
 435
 436 const struct drm_ioctl_desc qxl_ioctls[] = {
 437         DRM_IOCTL_DEF_DRV(QXL_ALLOC, qxl_alloc_ioctl, DRM_AUTH|DRM_UNLOCKED),
 438
 439         DRM_IOCTL_DEF_DRV(QXL_MAP, qxl_map_ioctl, DRM_AUTH|DRM_UNLOCKED),
 440
 441         DRM_IOCTL_DEF_DRV(QXL_EXECBUFFER, qxl_execbuffer_ioctl,
 442                                                         DRM_AUTH|DRM_UNLOCKED),
 443         DRM_IOCTL_DEF_DRV(QXL_UPDATE_AREA, qxl_update_area_ioctl,
 444                                                         DRM_AUTH|DRM_UNLOCKED),
 445         DRM_IOCTL_DEF_DRV(QXL_GETPARAM, qxl_getparam_ioctl,
 446                                                         DRM_AUTH|DRM_UNLOCKED),
 447         DRM_IOCTL_DEF_DRV(QXL_CLIENTCAP, qxl_clientcap_ioctl,
 448                                                         DRM_AUTH|DRM_UNLOCKED),
 449
 450         DRM_IOCTL_DEF_DRV(QXL_ALLOC_SURF, qxl_alloc_surf_ioctl,
 451                           DRM_AUTH|DRM_UNLOCKED),
 452 };
 453
 454 int qxl_max_ioctls = ARRAY_SIZE(qxl_ioctls);