drivers/gpu/drm/nouveau/nvif/user.c

   1 /*
   2  * Copyright 2018 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 #include <nvif/user.h>
  23 #include <nvif/device.h>
  24
  25 #include <nvif/class.h>
  26
  27 void
  28 nvif_user_fini(struct nvif_device *device)
  29 {
  30         if (device->user.func) {
  31                 nvif_object_fini(&device->user.object);
  32                 device->user.func = NULL;
  33         }
  34 }
  35
  36 int
  37 nvif_user_init(struct nvif_device *device)
  38 {
  39         struct {
  40                 s32 oclass;
  41                 int version;
  42                 const struct nvif_user_func *func;
  43         } users[] = {
  44                 { VOLTA_USERMODE_A, -1, &nvif_userc361 },
  45                 {}
  46         };
  47         int cid, ret;
  48
  49         if (device->user.func)
  50                 return 0;
  51
  52         cid = nvif_mclass(&device->object, users);
  53         if (cid < 0)
  54                 return cid;
  55
  56         ret = nvif_object_init(&device->object, 0, users[cid].oclass, NULL, 0,
  57                                &device->user.object);
  58         if (ret)
  59                 return ret;
  60
  61         nvif_object_map(&device->user.object, NULL, 0);
  62         device->user.func = users[cid].func;
  63         return 0;
  64 }