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 /*
  72  * dst must be validated, i.e. whole bo on vram/surfacesram (right now all bo's
  73  * are on vram).
  74  * *(dst + dst_off) = qxl_bo_physical_address(src, src_off)
  75  */
  76 static void
  77 apply_reloc(struct qxl_device *qdev, struct qxl_bo *dst, uint64_t dst_off,
  78             struct qxl_bo *src, uint64_t src_off)
  79 {
  80         void *reloc_page;
  81
  82         reloc_page = qxl_bo_kmap_atomic_page(qdev, dst, dst_off & PAGE_MASK);
  83         *(uint64_t *)(reloc_page + (dst_off & ~PAGE_MASK)) = qxl_bo_physical_address(qdev,
  84                                                                      src, src_off);
  85         qxl_bo_kunmap_atomic_page(qdev, dst, reloc_page);
  86 }
  87
  88 static void
  89 apply_surf_reloc(struct qxl_device *qdev, struct qxl_bo *dst, uint64_t dst_off,
  90                  struct qxl_bo *src)
  91 {
  92         uint32_t id = 0;
  93         void *reloc_page;
  94
  95         if (src && !src->is_primary)
  96                 id = src->surface_id;
  97
  98         reloc_page = qxl_bo_kmap_atomic_page(qdev, dst, dst_off & PAGE_MASK);
  99         *(uint32_t *)(reloc_page + (dst_off & ~PAGE_MASK)) = id;
 100         qxl_bo_kunmap_atomic_page(qdev, dst, reloc_page);
 101 }
 102
 103 /* return holding the reference to this object */
 104 static struct qxl_bo *qxlhw_handle_to_bo(struct qxl_device *qdev,
 105                                          struct drm_file *file_priv, uint64_t handle,
 106                                          struct qxl_reloc_list *reloc_list)
 107 {
 108         struct drm_gem_object *gobj;
 109         struct qxl_bo *qobj;
 110         int ret;
 111
 112         gobj = drm_gem_object_lookup(qdev->ddev, file_priv, handle);
 113         if (!gobj) {
 114                 DRM_ERROR("bad bo handle %lld\n", handle);
 115                 return NULL;
 116         }
 117         qobj = gem_to_qxl_bo(gobj);
 118
 119         ret = qxl_bo_list_add(reloc_list, qobj);
 120         if (ret)
 121                 return NULL;
 122
 123         return qobj;
 124 }
 125
 126 /*
 127  * Usage of execbuffer:
 128  * Relocations need to take into account the full QXLDrawable size.
 129  * However, the command as passed from user space must *not* contain the initial
 130  * QXLReleaseInfo struct (first XXX bytes)
 131  */
 132 static int qxl_execbuffer_ioctl(struct drm_device *dev, void *data,
 133                                 struct drm_file *file_priv)
 134 {
 135         struct qxl_device *qdev = dev->dev_private;
 136         struct drm_qxl_execbuffer *execbuffer = data;
 137         struct drm_qxl_command user_cmd;
 138         int cmd_num;
 139         struct qxl_bo *reloc_src_bo;
 140         struct qxl_bo *reloc_dst_bo;
 141         struct drm_qxl_reloc reloc;
 142         void *fb_cmd;
 143         int i, ret;
 144         struct qxl_reloc_list reloc_list;
 145         int unwritten;
 146         uint32_t reloc_dst_offset;
 147         INIT_LIST_HEAD(&reloc_list.bos);
 148
 149         for (cmd_num = 0; cmd_num < execbuffer->commands_num; ++cmd_num) {
 150                 struct qxl_release *release;
 151                 struct qxl_bo *cmd_bo;
 152                 int release_type;
 153                 struct drm_qxl_command *commands =
 154                         (struct drm_qxl_command *)(uintptr_t)execbuffer->commands;
 155
 156                 if (DRM_COPY_FROM_USER(&user_cmd, &commands[cmd_num],
 157                                        sizeof(user_cmd)))
 158                         return -EFAULT;
 159                 switch (user_cmd.type) {
 160                 case QXL_CMD_DRAW:
 161                         release_type = QXL_RELEASE_DRAWABLE;
 162                         break;
 163                 case QXL_CMD_SURFACE:
 164                 case QXL_CMD_CURSOR:
 165                 default:
 166                         DRM_DEBUG("Only draw commands in execbuffers\n");
 167                         return -EINVAL;
 168                         break;
 169                 }
 170
 171                 if (user_cmd.command_size > PAGE_SIZE - sizeof(union qxl_release_info))
 172                         return -EINVAL;
 173
 174                 ret = qxl_alloc_release_reserved(qdev,
 175                                                  sizeof(union qxl_release_info) +
 176                                                  user_cmd.command_size,
 177                                                  release_type,
 178                                                  &release,
 179                                                  &cmd_bo);
 180                 if (ret)
 181                         return ret;
 182
 183                 /* TODO copy slow path code from i915 */
 184                 fb_cmd = qxl_bo_kmap_atomic_page(qdev, cmd_bo, (release->release_offset & PAGE_SIZE));
 185                 unwritten = __copy_from_user_inatomic_nocache(fb_cmd + sizeof(union qxl_release_info) + (release->release_offset & ~PAGE_SIZE), (void *)(unsigned long)user_cmd.command, user_cmd.command_size);
 186                 qxl_bo_kunmap_atomic_page(qdev, cmd_bo, fb_cmd);
 187                 if (unwritten) {
 188                         DRM_ERROR("got unwritten %d\n", unwritten);
 189                         qxl_release_unreserve(qdev, release);
 190                         qxl_release_free(qdev, release);
 191                         return -EFAULT;
 192                 }
 193
 194                 for (i = 0 ; i < user_cmd.relocs_num; ++i) {
 195                         if (DRM_COPY_FROM_USER(&reloc,
 196                                                &((struct drm_qxl_reloc *)(uintptr_t)user_cmd.relocs)[i],
 197                                                sizeof(reloc))) {
 198                                 qxl_bo_list_unreserve(&reloc_list, true);
 199                                 qxl_release_unreserve(qdev, release);
 200                                 qxl_release_free(qdev, release);
 201                                 return -EFAULT;
 202                         }
 203
 204                         /* add the bos to the list of bos to validate -
 205                            need to validate first then process relocs? */
 206                         if (reloc.dst_handle) {
 207                                 reloc_dst_bo = qxlhw_handle_to_bo(qdev, file_priv,
 208                                                                   reloc.dst_handle, &reloc_list);
 209                                 if (!reloc_dst_bo) {
 210                                         qxl_bo_list_unreserve(&reloc_list, true);
 211                                         qxl_release_unreserve(qdev, release);
 212                                         qxl_release_free(qdev, release);
 213                                         return -EINVAL;
 214                                 }
 215                                 reloc_dst_offset = 0;
 216                         } else {
 217                                 reloc_dst_bo = cmd_bo;
 218                                 reloc_dst_offset = release->release_offset;
 219                         }
 220
 221                         /* reserve and validate the reloc dst bo */
 222                         if (reloc.reloc_type == QXL_RELOC_TYPE_BO || reloc.src_handle > 0) {
 223                                 reloc_src_bo =
 224                                         qxlhw_handle_to_bo(qdev, file_priv,
 225                                                            reloc.src_handle, &reloc_list);
 226                                 if (!reloc_src_bo) {
 227                                         if (reloc_dst_bo != cmd_bo)
 228                                                 drm_gem_object_unreference_unlocked(&reloc_dst_bo->gem_base);
 229                                         qxl_bo_list_unreserve(&reloc_list, true);
 230                                         qxl_release_unreserve(qdev, release);
 231                                         qxl_release_free(qdev, release);
 232                                         return -EINVAL;
 233                                 }
 234                         } else
 235                                 reloc_src_bo = NULL;
 236                         if (reloc.reloc_type == QXL_RELOC_TYPE_BO) {
 237                                 apply_reloc(qdev, reloc_dst_bo, reloc_dst_offset + reloc.dst_offset,
 238                                             reloc_src_bo, reloc.src_offset);
 239                         } else if (reloc.reloc_type == QXL_RELOC_TYPE_SURF) {
 240                                 apply_surf_reloc(qdev, reloc_dst_bo, reloc_dst_offset + reloc.dst_offset, reloc_src_bo);
 241                         } else {
 242                                 DRM_ERROR("unknown reloc type %d\n", reloc.reloc_type);
 243                                 return -EINVAL;
 244                         }
 245
 246                         if (reloc_src_bo && reloc_src_bo != cmd_bo) {
 247                                 qxl_release_add_res(qdev, release, reloc_src_bo);
 248                                 drm_gem_object_unreference_unlocked(&reloc_src_bo->gem_base);
 249                         }
 250
 251                         if (reloc_dst_bo != cmd_bo)
 252                                 drm_gem_object_unreference_unlocked(&reloc_dst_bo->gem_base);
 253                 }
 254                 qxl_fence_releaseable(qdev, release);
 255
 256                 ret = qxl_push_command_ring_release(qdev, release, user_cmd.type, true);
 257                 if (ret == -ERESTARTSYS) {
 258                         qxl_release_unreserve(qdev, release);
 259                         qxl_release_free(qdev, release);
 260                         qxl_bo_list_unreserve(&reloc_list, true);
 261                         return ret;
 262                 }
 263                 qxl_release_unreserve(qdev, release);
 264         }
 265         qxl_bo_list_unreserve(&reloc_list, 0);
 266         return 0;
 267 }
 268
 269 static int qxl_update_area_ioctl(struct drm_device *dev, void *data,
 270                                  struct drm_file *file)
 271 {
 272         struct qxl_device *qdev = dev->dev_private;
 273         struct drm_qxl_update_area *update_area = data;
 274         struct qxl_rect area = {.left = update_area->left,
 275                                 .top = update_area->top,
 276                                 .right = update_area->right,
 277                                 .bottom = update_area->bottom};
 278         int ret;
 279         struct drm_gem_object *gobj = NULL;
 280         struct qxl_bo *qobj = NULL;
 281
 282         if (update_area->left >= update_area->right ||
 283             update_area->top >= update_area->bottom)
 284                 return -EINVAL;
 285
 286         gobj = drm_gem_object_lookup(dev, file, update_area->handle);
 287         if (gobj == NULL)
 288                 return -ENOENT;
 289
 290         qobj = gem_to_qxl_bo(gobj);
 291
 292         ret = qxl_bo_reserve(qobj, false);
 293         if (ret)
 294                 goto out;
 295
 296         if (!qobj->pin_count) {
 297                 qxl_ttm_placement_from_domain(qobj, qobj->type);
 298                 ret = ttm_bo_validate(&qobj->tbo, &qobj->placement,
 299                                       true, false);
 300                 if (unlikely(ret))
 301                         goto out;
 302         }
 303
 304         ret = qxl_bo_check_id(qdev, qobj);
 305         if (ret)
 306                 goto out2;
 307         if (!qobj->surface_id)
 308                 DRM_ERROR("got update area for surface with no id %d\n", update_area->handle);
 309         ret = qxl_io_update_area(qdev, qobj, &area);
 310
 311 out2:
 312         qxl_bo_unreserve(qobj);
 313
 314 out:
 315         drm_gem_object_unreference_unlocked(gobj);
 316         return ret;
 317 }
 318
 319 static int qxl_getparam_ioctl(struct drm_device *dev, void *data,
 320                        struct drm_file *file_priv)
 321 {
 322         struct qxl_device *qdev = dev->dev_private;
 323         struct drm_qxl_getparam *param = data;
 324
 325         switch (param->param) {
 326         case QXL_PARAM_NUM_SURFACES:
 327                 param->value = qdev->rom->n_surfaces;
 328                 break;
 329         case QXL_PARAM_MAX_RELOCS:
 330                 param->value = QXL_MAX_RES;
 331                 break;
 332         default:
 333                 return -EINVAL;
 334         }
 335         return 0;
 336 }
 337
 338 static int qxl_clientcap_ioctl(struct drm_device *dev, void *data,
 339                                   struct drm_file *file_priv)
 340 {
 341         struct qxl_device *qdev = dev->dev_private;
 342         struct drm_qxl_clientcap *param = data;
 343         int byte, idx;
 344
 345         byte = param->index / 8;
 346         idx = param->index % 8;
 347
 348         if (qdev->pdev->revision < 4)
 349                 return -ENOSYS;
 350
 351         if (byte >= 58)
 352                 return -ENOSYS;
 353
 354         if (qdev->rom->client_capabilities[byte] & (1 << idx))
 355                 return 0;
 356         return -ENOSYS;
 357 }
 358
 359 static int qxl_alloc_surf_ioctl(struct drm_device *dev, void *data,
 360                                 struct drm_file *file)
 361 {
 362         struct qxl_device *qdev = dev->dev_private;
 363         struct drm_qxl_alloc_surf *param = data;
 364         struct qxl_bo *qobj;
 365         int handle;
 366         int ret;
 367         int size, actual_stride;
 368         struct qxl_surface surf;
 369
 370         /* work out size allocate bo with handle */
 371         actual_stride = param->stride < 0 ? -param->stride : param->stride;
 372         size = actual_stride * param->height + actual_stride;
 373
 374         surf.format = param->format;
 375         surf.width = param->width;
 376         surf.height = param->height;
 377         surf.stride = param->stride;
 378         surf.data = 0;
 379
 380         ret = qxl_gem_object_create_with_handle(qdev, file,
 381                                                 QXL_GEM_DOMAIN_SURFACE,
 382                                                 size,
 383                                                 &surf,
 384                                                 &qobj, &handle);
 385         if (ret) {
 386                 DRM_ERROR("%s: failed to create gem ret=%d\n",
 387                           __func__, ret);
 388                 return -ENOMEM;
 389         } else
 390                 param->handle = handle;
 391         return ret;
 392 }
 393
 394 struct drm_ioctl_desc qxl_ioctls[] = {
 395         DRM_IOCTL_DEF_DRV(QXL_ALLOC, qxl_alloc_ioctl, DRM_AUTH|DRM_UNLOCKED),
 396
 397         DRM_IOCTL_DEF_DRV(QXL_MAP, qxl_map_ioctl, DRM_AUTH|DRM_UNLOCKED),
 398
 399         DRM_IOCTL_DEF_DRV(QXL_EXECBUFFER, qxl_execbuffer_ioctl,
 400                                                         DRM_AUTH|DRM_UNLOCKED),
 401         DRM_IOCTL_DEF_DRV(QXL_UPDATE_AREA, qxl_update_area_ioctl,
 402                                                         DRM_AUTH|DRM_UNLOCKED),
 403         DRM_IOCTL_DEF_DRV(QXL_GETPARAM, qxl_getparam_ioctl,
 404                                                         DRM_AUTH|DRM_UNLOCKED),
 405         DRM_IOCTL_DEF_DRV(QXL_CLIENTCAP, qxl_clientcap_ioctl,
 406                                                         DRM_AUTH|DRM_UNLOCKED),
 407
 408         DRM_IOCTL_DEF_DRV(QXL_ALLOC_SURF, qxl_alloc_surf_ioctl,
 409                           DRM_AUTH|DRM_UNLOCKED),
 410 };
 411
 412 int qxl_max_ioctls = DRM_ARRAY_SIZE(qxl_ioctls);