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

   1 /*
   2  * Copyright 2016 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: Ben Skeggs
  23  */
  24 #include <nvif/driver.h>
  25 #include <nvif/client.h>
  26
  27 static const struct nvif_driver *
  28 nvif_driver[] = {
  29 #ifdef __KERNEL__
  30         &nvif_driver_nvkm,
  31 #else
  32         &nvif_driver_drm,
  33         &nvif_driver_lib,
  34         &nvif_driver_null,
  35 #endif
  36         NULL
  37 };
  38
  39 int
  40 nvif_driver_init(const char *drv, const char *cfg, const char *dbg,
  41                  const char *name, u64 device, struct nvif_client *client)
  42 {
  43         int ret = -EINVAL, i;
  44
  45         for (i = 0; (client->driver = nvif_driver[i]); i++) {
  46                 if (!drv || !strcmp(client->driver->name, drv)) {
  47                         ret = client->driver->init(name, device, cfg, dbg,
  48                                                    &client->object.priv);
  49                         if (ret == 0)
  50                                 break;
  51                         client->driver->fini(client->object.priv);
  52                 }
  53         }
  54
  55         if (ret == 0)
  56                 ret = nvif_client_ctor(client, name, device, client);
  57         return ret;
  58 }