drivers/gpu/drm/nouveau/core/core/engine.c

   1 /*
   2  * Copyright 2012 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
  25 #include <core/device.h>
  26 #include <core/engine.h>
  27 #include <core/option.h>
  28
  29 struct nouveau_engine *
  30 nouveau_engine(void *obj, int idx)
  31 {
  32         obj = nouveau_subdev(obj, idx);
  33         if (obj && nv_iclass(obj, NV_ENGINE_CLASS))
  34                 return nv_engine(obj);
  35         return NULL;
  36 }
  37
  38 int
  39 nouveau_engine_create_(struct nouveau_object *parent,
  40                        struct nouveau_object *engobj,
  41                        struct nouveau_oclass *oclass, bool enable,
  42                        const char *iname, const char *fname,
  43                        int length, void **pobject)
  44 {
  45         struct nouveau_engine *engine;
  46         int ret;
  47
  48         ret = nouveau_subdev_create_(parent, engobj, oclass, NV_ENGINE_CLASS,
  49                                      iname, fname, length, pobject);
  50         engine = *pobject;
  51         if (ret)
  52                 return ret;
  53
  54         if (parent) {
  55                 struct nouveau_device *device = nv_device(parent);
  56                 int engidx = nv_engidx(engine);
  57
  58                 if (device->disable_mask & (1ULL << engidx)) {
  59                         if (!nouveau_boolopt(device->cfgopt, iname, false)) {
  60                                 nv_debug(engine, "engine disabled by hw/fw\n");
  61                                 return -ENODEV;
  62                         }
  63
  64                         nv_warn(engine, "ignoring hw/fw engine disable\n");
  65                 }
  66
  67                 if (!nouveau_boolopt(device->cfgopt, iname, enable)) {
  68                         if (!enable)
  69                                 nv_warn(engine, "disabled, %s=1 to enable\n", iname);
  70                         return -ENODEV;
  71                 }
  72         }
  73
  74         INIT_LIST_HEAD(&engine->contexts);
  75         spin_lock_init(&engine->lock);
  76         return 0;
  77 }