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(VERIFY_READ,
 167                        u64_to_user_ptr(cmd->command),
 168                        cmd->command_size))
 169                 return -EFAULT;
 170
 171         reloc_info = kmalloc_array(cmd->relocs_num,
 172                                    sizeof(struct qxl_reloc_info), GFP_KERNEL);
 173         if (!reloc_info)
 174                 return -ENOMEM;
 175
 176         ret = qxl_alloc_release_reserved(qdev,
 177                                          sizeof(union qxl_release_info) +
 178                                          cmd->command_size,
 179                                          release_type,
 180                                          &release,
 181                                          &cmd_bo);
 182         if (ret)
 183                 goto out_free_reloc;
 184
 185         /* TODO copy slow path code from i915 */
 186         fb_cmd = qxl_bo_kmap_atomic_page(qdev, cmd_bo, (release->release_offset & PAGE_MASK));
 187         unwritten = __copy_from_user_inatomic_nocache
 188                 (fb_cmd + sizeof(union qxl_release_info) + (release->release_offset & ~PAGE_MASK),
 189                  u64_to_user_ptr(cmd->command), cmd->command_size);
 190
 191         {
 192                 struct qxl_drawable *draw = fb_cmd;
 193
 194                 draw->mm_time = qdev->rom->mm_clock;
 195         }
 196
 197         qxl_bo_kunmap_atomic_page(qdev, cmd_bo, fb_cmd);
 198         if (unwritten) {
 199                 DRM_ERROR("got unwritten %d\n", unwritten);
 200                 ret = -EFAULT;
 201                 goto out_free_release;
 202         }
 203
 204         /* fill out reloc info structs */
 205         num_relocs = 0;
 206         for (i = 0; i < cmd->relocs_num; ++i) {
 207                 struct drm_qxl_reloc reloc;
 208                 struct drm_qxl_reloc __user *u = u64_to_user_ptr(cmd->relocs);
 209
 210                 if (copy_from_user(&reloc, u + i, sizeof(reloc))) {
 211                         ret = -EFAULT;
 212                         goto out_free_bos;
 213                 }
 214
 215                 /* add the bos to the list of bos to validate -
 216                    need to validate first then process relocs? */
 217                 if (reloc.reloc_type != QXL_RELOC_TYPE_BO && reloc.reloc_type != QXL_RELOC_TYPE_SURF) {
 218                         DRM_DEBUG("unknown reloc type %d\n", reloc.reloc_type);
 219
 220                         ret = -EINVAL;
 221                         goto out_free_bos;
 222                 }
 223                 reloc_info[i].type = reloc.reloc_type;
 224
 225                 if (reloc.dst_handle) {
 226                         ret = qxlhw_handle_to_bo(file_priv, reloc.dst_handle, release,
 227                                                  &reloc_info[i].dst_bo);
 228                         if (ret)
 229                                 goto out_free_bos;
 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) {
 239                         ret = qxlhw_handle_to_bo(file_priv, reloc.src_handle, release,
 240                                                  &reloc_info[i].src_bo);
 241                         if (ret)
 242                                 goto out_free_bos;
 243                         reloc_info[i].src_offset = reloc.src_offset;
 244                 } else {
 245                         reloc_info[i].src_bo = NULL;
 246                         reloc_info[i].src_offset = 0;
 247                 }
 248         }
 249
 250         /* validate all buffers */
 251         ret = qxl_release_reserve_list(release, false);
 252         if (ret)
 253                 goto out_free_bos;
 254
 255         for (i = 0; i < cmd->relocs_num; ++i) {
 256                 if (reloc_info[i].type == QXL_RELOC_TYPE_BO)
 257                         apply_reloc(qdev, &reloc_info[i]);
 258                 else if (reloc_info[i].type == QXL_RELOC_TYPE_SURF)
 259                         apply_surf_reloc(qdev, &reloc_info[i]);
 260         }
 261
 262         ret = qxl_push_command_ring_release(qdev, release, cmd->type, true);
 263         if (ret)
 264                 qxl_release_backoff_reserve_list(release);
 265         else
 266                 qxl_release_fence_buffer_objects(release);
 267
 268 out_free_bos:
 269 out_free_release:
 270         if (ret)
 271                 qxl_release_free(qdev, release);
 272 out_free_reloc:
 273         kfree(reloc_info);
 274         return ret;
 275 }
 276
 277 static int qxl_execbuffer_ioctl(struct drm_device *dev, void *data,
 278                                 struct drm_file *file_priv)
 279 {
 280         struct qxl_device *qdev = dev->dev_private;
 281         struct drm_qxl_execbuffer *execbuffer = data;
 282         struct drm_qxl_command user_cmd;
 283         int cmd_num;
 284         int ret;
 285
 286         for (cmd_num = 0; cmd_num < execbuffer->commands_num; ++cmd_num) {
 287
 288                 struct drm_qxl_command __user *commands =
 289                         u64_to_user_ptr(execbuffer->commands);
 290
 291                 if (copy_from_user(&user_cmd, commands + cmd_num,
 292                                        sizeof(user_cmd)))
 293                         return -EFAULT;
 294
 295                 ret = qxl_process_single_command(qdev, &user_cmd, file_priv);
 296                 if (ret)
 297                         return ret;
 298         }
 299         return 0;
 300 }
 301
 302 static int qxl_update_area_ioctl(struct drm_device *dev, void *data,
 303                                  struct drm_file *file)
 304 {
 305         struct qxl_device *qdev = dev->dev_private;
 306         struct drm_qxl_update_area *update_area = data;
 307         struct qxl_rect area = {.left = update_area->left,
 308                                 .top = update_area->top,
 309                                 .right = update_area->right,
 310                                 .bottom = update_area->bottom};
 311         int ret;
 312         struct drm_gem_object *gobj = NULL;
 313         struct qxl_bo *qobj = NULL;
 314         struct ttm_operation_ctx ctx = { true, false };
 315
 316         if (update_area->left >= update_area->right ||
 317             update_area->top >= update_area->bottom)
 318                 return -EINVAL;
 319
 320         gobj = drm_gem_object_lookup(file, update_area->handle);
 321         if (gobj == NULL)
 322                 return -ENOENT;
 323
 324         qobj = gem_to_qxl_bo(gobj);
 325
 326         ret = qxl_bo_reserve(qobj, false);
 327         if (ret)
 328                 goto out;
 329
 330         if (!qobj->pin_count) {
 331                 qxl_ttm_placement_from_domain(qobj, qobj->type, false);
 332                 ret = ttm_bo_validate(&qobj->tbo, &qobj->placement, &ctx);
 333                 if (unlikely(ret))
 334                         goto out;
 335         }
 336
 337         ret = qxl_bo_check_id(qdev, qobj);
 338         if (ret)
 339                 goto out2;
 340         if (!qobj->surface_id)
 341                 DRM_ERROR("got update area for surface with no id %d\n", update_area->handle);
 342         ret = qxl_io_update_area(qdev, qobj, &area);
 343
 344 out2:
 345         qxl_bo_unreserve(qobj);
 346
 347 out:
 348         drm_gem_object_put_unlocked(gobj);
 349         return ret;
 350 }
 351
 352 static int qxl_getparam_ioctl(struct drm_device *dev, void *data,
 353                        struct drm_file *file_priv)
 354 {
 355         struct qxl_device *qdev = dev->dev_private;
 356         struct drm_qxl_getparam *param = data;
 357
 358         switch (param->param) {
 359         case QXL_PARAM_NUM_SURFACES:
 360                 param->value = qdev->rom->n_surfaces;
 361                 break;
 362         case QXL_PARAM_MAX_RELOCS:
 363                 param->value = QXL_MAX_RES;
 364                 break;
 365         default:
 366                 return -EINVAL;
 367         }
 368         return 0;
 369 }
 370
 371 static int qxl_clientcap_ioctl(struct drm_device *dev, void *data,
 372                                   struct drm_file *file_priv)
 373 {
 374         struct qxl_device *qdev = dev->dev_private;
 375         struct drm_qxl_clientcap *param = data;
 376         int byte, idx;
 377
 378         byte = param->index / 8;
 379         idx = param->index % 8;
 380
 381         if (dev->pdev->revision < 4)
 382                 return -ENOSYS;
 383
 384         if (byte >= 58)
 385                 return -ENOSYS;
 386
 387         if (qdev->rom->client_capabilities[byte] & (1 << idx))
 388                 return 0;
 389         return -ENOSYS;
 390 }
 391
 392 static int qxl_alloc_surf_ioctl(struct drm_device *dev, void *data,
 393                                 struct drm_file *file)
 394 {
 395         struct qxl_device *qdev = dev->dev_private;
 396         struct drm_qxl_alloc_surf *param = data;
 397         struct qxl_bo *qobj;
 398         int handle;
 399         int ret;
 400         int size, actual_stride;
 401         struct qxl_surface surf;
 402
 403         /* work out size allocate bo with handle */
 404         actual_stride = param->stride < 0 ? -param->stride : param->stride;
 405         size = actual_stride * param->height + actual_stride;
 406
 407         surf.format = param->format;
 408         surf.width = param->width;
 409         surf.height = param->height;
 410         surf.stride = param->stride;
 411         surf.data = 0;
 412
 413         ret = qxl_gem_object_create_with_handle(qdev, file,
 414                                                 QXL_GEM_DOMAIN_SURFACE,
 415                                                 size,
 416                                                 &surf,
 417                                                 &qobj, &handle);
 418         if (ret) {
 419                 DRM_ERROR("%s: failed to create gem ret=%d\n",
 420                           __func__, ret);
 421                 return -ENOMEM;
 422         } else
 423                 param->handle = handle;
 424         return ret;
 425 }
 426
 427 const struct drm_ioctl_desc qxl_ioctls[] = {
 428         DRM_IOCTL_DEF_DRV(QXL_ALLOC, qxl_alloc_ioctl, DRM_AUTH),
 429
 430         DRM_IOCTL_DEF_DRV(QXL_MAP, qxl_map_ioctl, DRM_AUTH),
 431
 432         DRM_IOCTL_DEF_DRV(QXL_EXECBUFFER, qxl_execbuffer_ioctl,
 433                                                         DRM_AUTH),
 434         DRM_IOCTL_DEF_DRV(QXL_UPDATE_AREA, qxl_update_area_ioctl,
 435                                                         DRM_AUTH),
 436         DRM_IOCTL_DEF_DRV(QXL_GETPARAM, qxl_getparam_ioctl,
 437                                                         DRM_AUTH),
 438         DRM_IOCTL_DEF_DRV(QXL_CLIENTCAP, qxl_clientcap_ioctl,
 439                                                         DRM_AUTH),
 440
 441         DRM_IOCTL_DEF_DRV(QXL_ALLOC_SURF, qxl_alloc_surf_ioctl,
 442                           DRM_AUTH),
 443 };
 444
 445 int qxl_max_ioctls = ARRAY_SIZE(qxl_ioctls);