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