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 <linux/pci.h>
  27 #include <linux/uaccess.h>
  28
  29 #include "qxl_drv.h"
  30 #include "qxl_object.h"
  31
  32 /*
  33  * TODO: allocating a new gem(in qxl_bo) for each request.
  34  * This is wasteful since bo's are page aligned.
  35  */
  36 static int qxl_alloc_ioctl(struct drm_device *dev, void *data,
  37                            struct drm_file *file_priv)
  38 {
  39         struct qxl_device *qdev = dev->dev_private;
  40         struct drm_qxl_alloc *qxl_alloc = data;
  41         int ret;
  42         struct qxl_bo *qobj;
  43         uint32_t handle;
  44         u32 domain = QXL_GEM_DOMAIN_VRAM;
  45
  46         if (qxl_alloc->size == 0) {
  47                 DRM_ERROR("invalid size %d\n", qxl_alloc->size);
  48                 return -EINVAL;
  49         }
  50         ret = qxl_gem_object_create_with_handle(qdev, file_priv,
  51                                                 domain,
  52                                                 qxl_alloc->size,
  53                                                 NULL,
  54                                                 &qobj, &handle);
  55         if (ret) {
  56                 DRM_ERROR("%s: failed to create gem ret=%d\n",
  57                           __func__, ret);
  58                 return -ENOMEM;
  59         }
  60         qxl_alloc->handle = handle;
  61         return 0;
  62 }
  63
  64 static int qxl_map_ioctl(struct drm_device *dev, void *data,
  65                          struct drm_file *file_priv)
  66 {
  67         struct qxl_device *qdev = dev->dev_private;
  68         struct drm_qxl_map *qxl_map = data;
  69
  70         return qxl_mode_dumb_mmap(file_priv, &qdev->ddev, qxl_map->handle,
  71                                   &qxl_map->offset);
  72 }
  73
  74 struct qxl_reloc_info {
  75         int type;
  76         struct qxl_bo *dst_bo;
  77         uint32_t dst_offset;
  78         struct qxl_bo *src_bo;
  79         int src_offset;
  80 };
  81
  82 /*
  83  * dst must be validated, i.e. whole bo on vram/surfacesram (right now all bo's
  84  * are on vram).
  85  * *(dst + dst_off) = qxl_bo_physical_address(src, src_off)
  86  */
  87 static void
  88 apply_reloc(struct qxl_device *qdev, struct qxl_reloc_info *info)
  89 {
  90         void *reloc_page;
  91
  92         reloc_page = qxl_bo_kmap_atomic_page(qdev, info->dst_bo, info->dst_offset & PAGE_MASK);
  93         *(uint64_t *)(reloc_page + (info->dst_offset & ~PAGE_MASK)) = qxl_bo_physical_address(qdev,
  94                                                                                               info->src_bo,
  95                                                                                               info->src_offset);
  96         qxl_bo_kunmap_atomic_page(qdev, info->dst_bo, reloc_page);
  97 }
  98
  99 static void
 100 apply_surf_reloc(struct qxl_device *qdev, struct qxl_reloc_info *info)
 101 {
 102         uint32_t id = 0;
 103         void *reloc_page;
 104
 105         if (info->src_bo && !info->src_bo->is_primary)
 106                 id = info->src_bo->surface_id;
 107
 108         reloc_page = qxl_bo_kmap_atomic_page(qdev, info->dst_bo, info->dst_offset & PAGE_MASK);
 109         *(uint32_t *)(reloc_page + (info->dst_offset & ~PAGE_MASK)) = id;
 110         qxl_bo_kunmap_atomic_page(qdev, info->dst_bo, reloc_page);
 111 }
 112
 113 /* return holding the reference to this object */
 114 static int qxlhw_handle_to_bo(struct drm_file *file_priv, uint64_t handle,
 115                               struct qxl_release *release, struct qxl_bo **qbo_p)
 116 {
 117         struct drm_gem_object *gobj;
 118         struct qxl_bo *qobj;
 119         int ret;
 120
 121         gobj = drm_gem_object_lookup(file_priv, handle);
 122         if (!gobj)
 123                 return -EINVAL;
 124
 125         qobj = gem_to_qxl_bo(gobj);
 126
 127         ret = qxl_release_list_add(release, qobj);
 128         drm_gem_object_put_unlocked(gobj);
 129         if (ret)
 130                 return ret;
 131
 132         *qbo_p = qobj;
 133         return 0;
 134 }
 135
 136 /*
 137  * Usage of execbuffer:
 138  * Relocations need to take into account the full QXLDrawable size.
 139  * However, the command as passed from user space must *not* contain the initial
 140  * QXLReleaseInfo struct (first XXX bytes)
 141  */
 142 static int qxl_process_single_command(struct qxl_device *qdev,
 143                                       struct drm_qxl_command *cmd,
 144                                       struct drm_file *file_priv)
 145 {
 146         struct qxl_reloc_info *reloc_info;
 147         int release_type;
 148         struct qxl_release *release;
 149         struct qxl_bo *cmd_bo;
 150         void *fb_cmd;
 151         int i, ret, num_relocs;
 152         int unwritten;
 153
 154         switch (cmd->type) {
 155         case QXL_CMD_DRAW:
 156                 release_type = QXL_RELEASE_DRAWABLE;
 157                 break;
 158         case QXL_CMD_SURFACE:
 159         case QXL_CMD_CURSOR:
 160         default:
 161                 DRM_DEBUG("Only draw commands in execbuffers\n");
 162                 return -EINVAL;
 163                 break;
 164         }
 165
 166         if (cmd->command_size > PAGE_SIZE - sizeof(union qxl_release_info))
 167                 return -EINVAL;
 168
 169         if (!access_ok(u64_to_user_ptr(cmd->command),
 170                        cmd->command_size))
 171                 return -EFAULT;
 172
 173         reloc_info = kmalloc_array(cmd->relocs_num,
 174                                    sizeof(struct qxl_reloc_info), GFP_KERNEL);
 175         if (!reloc_info)
 176                 return -ENOMEM;
 177
 178         ret = qxl_alloc_release_reserved(qdev,
 179                                          sizeof(union qxl_release_info) +
 180                                          cmd->command_size,
 181                                          release_type,
 182                                          &release,
 183                                          &cmd_bo);
 184         if (ret)
 185                 goto out_free_reloc;
 186
 187         /* TODO copy slow path code from i915 */
 188         fb_cmd = qxl_bo_kmap_atomic_page(qdev, cmd_bo, (release->release_offset & PAGE_MASK));
 189         unwritten = __copy_from_user_inatomic_nocache
 190                 (fb_cmd + sizeof(union qxl_release_info) + (release->release_offset & ~PAGE_MASK),
 191                  u64_to_user_ptr(cmd->command), cmd->command_size);
 192
 193         {
 194                 struct qxl_drawable *draw = fb_cmd;
 195
 196                 draw->mm_time = qdev->rom->mm_clock;
 197         }
 198
 199         qxl_bo_kunmap_atomic_page(qdev, cmd_bo, fb_cmd);
 200         if (unwritten) {
 201                 DRM_ERROR("got unwritten %d\n", unwritten);
 202                 ret = -EFAULT;
 203                 goto out_free_release;
 204         }
 205
 206         /* fill out reloc info structs */
 207         num_relocs = 0;
 208         for (i = 0; i < cmd->relocs_num; ++i) {
 209                 struct drm_qxl_reloc reloc;
 210                 struct drm_qxl_reloc __user *u = u64_to_user_ptr(cmd->relocs);
 211
 212                 if (copy_from_user(&reloc, u + i, sizeof(reloc))) {
 213                         ret = -EFAULT;
 214                         goto out_free_bos;
 215                 }
 216
 217                 /* add the bos to the list of bos to validate -
 218                    need to validate first then process relocs? */
 219                 if (reloc.reloc_type != QXL_RELOC_TYPE_BO && reloc.reloc_type != QXL_RELOC_TYPE_SURF) {
 220                         DRM_DEBUG("unknown reloc type %d\n", reloc.reloc_type);
 221
 222                         ret = -EINVAL;
 223                         goto out_free_bos;
 224                 }
 225                 reloc_info[i].type = reloc.reloc_type;
 226
 227                 if (reloc.dst_handle) {
 228                         ret = qxlhw_handle_to_bo(file_priv, reloc.dst_handle, release,
 229                                                  &reloc_info[i].dst_bo);
 230                         if (ret)
 231                                 goto out_free_bos;
 232                         reloc_info[i].dst_offset = reloc.dst_offset;
 233                 } else {
 234                         reloc_info[i].dst_bo = cmd_bo;
 235                         reloc_info[i].dst_offset = reloc.dst_offset + release->release_offset;
 236                 }
 237                 num_relocs++;
 238
 239                 /* reserve and validate the reloc dst bo */
 240                 if (reloc.reloc_type == QXL_RELOC_TYPE_BO || reloc.src_handle) {
 241                         ret = qxlhw_handle_to_bo(file_priv, reloc.src_handle, release,
 242                                                  &reloc_info[i].src_bo);
 243                         if (ret)
 244                                 goto out_free_bos;
 245                         reloc_info[i].src_offset = reloc.src_offset;
 246                 } else {
 247                         reloc_info[i].src_bo = NULL;
 248                         reloc_info[i].src_offset = 0;
 249                 }
 250         }
 251
 252         /* validate all buffers */
 253         ret = qxl_release_reserve_list(release, false);
 254         if (ret)
 255                 goto out_free_bos;
 256
 257         for (i = 0; i < cmd->relocs_num; ++i) {
 258                 if (reloc_info[i].type == QXL_RELOC_TYPE_BO)
 259                         apply_reloc(qdev, &reloc_info[i]);
 260                 else if (reloc_info[i].type == QXL_RELOC_TYPE_SURF)
 261                         apply_surf_reloc(qdev, &reloc_info[i]);
 262         }
 263
 264         ret = qxl_push_command_ring_release(qdev, release, cmd->type, true);
 265         if (ret)
 266                 qxl_release_backoff_reserve_list(release);
 267         else
 268                 qxl_release_fence_buffer_objects(release);
 269
 270 out_free_bos:
 271 out_free_release:
 272         if (ret)
 273                 qxl_release_free(qdev, release);
 274 out_free_reloc:
 275         kfree(reloc_info);
 276         return ret;
 277 }
 278
 279 static int qxl_execbuffer_ioctl(struct drm_device *dev, void *data,
 280                                 struct drm_file *file_priv)
 281 {
 282         struct qxl_device *qdev = dev->dev_private;
 283         struct drm_qxl_execbuffer *execbuffer = data;
 284         struct drm_qxl_command user_cmd;
 285         int cmd_num;
 286         int ret;
 287
 288         for (cmd_num = 0; cmd_num < execbuffer->commands_num; ++cmd_num) {
 289
 290                 struct drm_qxl_command __user *commands =
 291                         u64_to_user_ptr(execbuffer->commands);
 292
 293                 if (copy_from_user(&user_cmd, commands + cmd_num,
 294                                        sizeof(user_cmd)))
 295                         return -EFAULT;
 296
 297                 ret = qxl_process_single_command(qdev, &user_cmd, file_priv);
 298                 if (ret)
 299                         return ret;
 300         }
 301         return 0;
 302 }
 303
 304 static int qxl_update_area_ioctl(struct drm_device *dev, void *data,
 305                                  struct drm_file *file)
 306 {
 307         struct qxl_device *qdev = dev->dev_private;
 308         struct drm_qxl_update_area *update_area = data;
 309         struct qxl_rect area = {.left = update_area->left,
 310                                 .top = update_area->top,
 311                                 .right = update_area->right,
 312                                 .bottom = update_area->bottom};
 313         int ret;
 314         struct drm_gem_object *gobj = NULL;
 315         struct qxl_bo *qobj = NULL;
 316         struct ttm_operation_ctx ctx = { true, false };
 317
 318         if (update_area->left >= update_area->right ||
 319             update_area->top >= update_area->bottom)
 320                 return -EINVAL;
 321
 322         gobj = drm_gem_object_lookup(file, update_area->handle);
 323         if (gobj == NULL)
 324                 return -ENOENT;
 325
 326         qobj = gem_to_qxl_bo(gobj);
 327
 328         ret = qxl_bo_reserve(qobj, false);
 329         if (ret)
 330                 goto out;
 331
 332         if (!qobj->pin_count) {
 333                 qxl_ttm_placement_from_domain(qobj, qobj->type, false);
 334                 ret = ttm_bo_validate(&qobj->tbo, &qobj->placement, &ctx);
 335                 if (unlikely(ret))
 336                         goto out;
 337         }
 338
 339         ret = qxl_bo_check_id(qdev, qobj);
 340         if (ret)
 341                 goto out2;
 342         if (!qobj->surface_id)
 343                 DRM_ERROR("got update area for surface with no id %d\n", update_area->handle);
 344         ret = qxl_io_update_area(qdev, qobj, &area);
 345
 346 out2:
 347         qxl_bo_unreserve(qobj);
 348
 349 out:
 350         drm_gem_object_put_unlocked(gobj);
 351         return ret;
 352 }
 353
 354 static int qxl_getparam_ioctl(struct drm_device *dev, void *data,
 355                        struct drm_file *file_priv)
 356 {
 357         struct qxl_device *qdev = dev->dev_private;
 358         struct drm_qxl_getparam *param = data;
 359
 360         switch (param->param) {
 361         case QXL_PARAM_NUM_SURFACES:
 362                 param->value = qdev->rom->n_surfaces;
 363                 break;
 364         case QXL_PARAM_MAX_RELOCS:
 365                 param->value = QXL_MAX_RES;
 366                 break;
 367         default:
 368                 return -EINVAL;
 369         }
 370         return 0;
 371 }
 372
 373 static int qxl_clientcap_ioctl(struct drm_device *dev, void *data,
 374                                   struct drm_file *file_priv)
 375 {
 376         struct qxl_device *qdev = dev->dev_private;
 377         struct drm_qxl_clientcap *param = data;
 378         int byte, idx;
 379
 380         byte = param->index / 8;
 381         idx = param->index % 8;
 382
 383         if (dev->pdev->revision < 4)
 384                 return -ENOSYS;
 385
 386         if (byte >= 58)
 387                 return -ENOSYS;
 388
 389         if (qdev->rom->client_capabilities[byte] & (1 << idx))
 390                 return 0;
 391         return -ENOSYS;
 392 }
 393
 394 static int qxl_alloc_surf_ioctl(struct drm_device *dev, void *data,
 395                                 struct drm_file *file)
 396 {
 397         struct qxl_device *qdev = dev->dev_private;
 398         struct drm_qxl_alloc_surf *param = data;
 399         struct qxl_bo *qobj;
 400         int handle;
 401         int ret;
 402         int size, actual_stride;
 403         struct qxl_surface surf;
 404
 405         /* work out size allocate bo with handle */
 406         actual_stride = param->stride < 0 ? -param->stride : param->stride;
 407         size = actual_stride * param->height + actual_stride;
 408
 409         surf.format = param->format;
 410         surf.width = param->width;
 411         surf.height = param->height;
 412         surf.stride = param->stride;
 413         surf.data = 0;
 414
 415         ret = qxl_gem_object_create_with_handle(qdev, file,
 416                                                 QXL_GEM_DOMAIN_SURFACE,
 417                                                 size,
 418                                                 &surf,
 419                                                 &qobj, &handle);
 420         if (ret) {
 421                 DRM_ERROR("%s: failed to create gem ret=%d\n",
 422                           __func__, ret);
 423                 return -ENOMEM;
 424         } else
 425                 param->handle = handle;
 426         return ret;
 427 }
 428
 429 const struct drm_ioctl_desc qxl_ioctls[] = {
 430         DRM_IOCTL_DEF_DRV(QXL_ALLOC, qxl_alloc_ioctl, DRM_AUTH),
 431
 432         DRM_IOCTL_DEF_DRV(QXL_MAP, qxl_map_ioctl, DRM_AUTH),
 433
 434         DRM_IOCTL_DEF_DRV(QXL_EXECBUFFER, qxl_execbuffer_ioctl,
 435                                                         DRM_AUTH),
 436         DRM_IOCTL_DEF_DRV(QXL_UPDATE_AREA, qxl_update_area_ioctl,
 437                                                         DRM_AUTH),
 438         DRM_IOCTL_DEF_DRV(QXL_GETPARAM, qxl_getparam_ioctl,
 439                                                         DRM_AUTH),
 440         DRM_IOCTL_DEF_DRV(QXL_CLIENTCAP, qxl_clientcap_ioctl,
 441                                                         DRM_AUTH),
 442
 443         DRM_IOCTL_DEF_DRV(QXL_ALLOC_SURF, qxl_alloc_surf_ioctl,
 444                           DRM_AUTH),
 445 };
 446
 447 int qxl_max_ioctls = ARRAY_SIZE(qxl_ioctls);