drivers/gpu/drm/i915/selftests/mock_drm.c

   1 /*
   2  * Copyright © 2017 Intel Corporation
   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 (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
  21  * IN THE SOFTWARE.
  22  *
  23  */
  24
  25 #include "mock_drm.h"
  26
  27 struct drm_file *mock_file(struct drm_i915_private *i915)
  28 {
  29         struct file *filp;
  30         struct inode *inode;
  31         struct drm_file *file;
  32         int err;
  33
  34         inode = kzalloc(sizeof(*inode), GFP_KERNEL);
  35         if (!inode) {
  36                 err = -ENOMEM;
  37                 goto err;
  38         }
  39
  40         inode->i_rdev = i915->drm.primary->index;
  41
  42         filp = kzalloc(sizeof(*filp), GFP_KERNEL);
  43         if (!filp) {
  44                 err = -ENOMEM;
  45                 goto err_inode;
  46         }
  47
  48         err = drm_open(inode, filp);
  49         if (err)
  50                 goto err_filp;
  51
  52         file = filp->private_data;
  53         memset(&file->filp, POISON_INUSE, sizeof(file->filp));
  54         file->authenticated = true;
  55
  56         kfree(filp);
  57         kfree(inode);
  58         return file;
  59
  60 err_filp:
  61         kfree(filp);
  62 err_inode:
  63         kfree(inode);
  64 err:
  65         return ERR_PTR(err);
  66 }
  67
  68 void mock_file_free(struct drm_i915_private *i915, struct drm_file *file)
  69 {
  70         struct file filp = { .private_data = file };
  71
  72         drm_release(NULL, &filp);
  73 }