LXR linux/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
  27void
  28nvif_user_dtor(struct nvif_device *device)
  29{
  30        if (device->user.func) {
  31                nvif_object_dtor(&device->user.object);
  32                device->user.func = NULL;
  33        }
  34}
  35
  36int
  37nvif_user_ctor(struct nvif_device *device, const char *name)
  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_ctor(&device->object, name ? name : "nvifUsermode",
  57                               0, users[cid].oclass, NULL, 0,
  58                               &device->user.object);
  59        if (ret)
  60                return ret;
  61
  62        nvif_object_map(&device->user.object, NULL, 0);
  63        device->user.func = users[cid].func;
  64        return 0;
  65}
  66