drivers/gpu/drm/nouveau/core/core/parent.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/object.h>
  26 #include <core/parent.h>
  27 #include <core/client.h>
  28
  29 int
  30 nouveau_parent_sclass(struct nouveau_object *parent, u16 handle,
  31                       struct nouveau_object **pengine,
  32                       struct nouveau_oclass **poclass)
  33 {
  34         struct nouveau_sclass *sclass;
  35         struct nouveau_engine *engine;
  36         struct nouveau_oclass *oclass;
  37         u64 mask;
  38
  39         sclass = nv_parent(parent)->sclass;
  40         while (sclass) {
  41                 if ((sclass->oclass->handle & 0xffff) == handle) {
  42                         *pengine = parent->engine;
  43                         *poclass = sclass->oclass;
  44                         return 0;
  45                 }
  46
  47                 sclass = sclass->sclass;
  48         }
  49
  50         mask = nv_parent(parent)->engine;
  51         while (mask) {
  52                 int i = ffsll(mask) - 1;
  53
  54                 if (nv_iclass(parent, NV_CLIENT_CLASS))
  55                         engine = nv_engine(nv_client(parent)->device);
  56                 else
  57                         engine = nouveau_engine(parent, i);
  58
  59                 if (engine) {
  60                         oclass = engine->sclass;
  61                         while (oclass->ofuncs) {
  62                                 if ((oclass->handle & 0xffff) == handle) {
  63                                         *pengine = nv_object(engine);
  64                                         *poclass = oclass;
  65                                         return 0;
  66                                 }
  67                                 oclass++;
  68                         }
  69                 }
  70
  71                 mask &= ~(1ULL << i);
  72         }
  73
  74         return -EINVAL;
  75 }
  76
  77 int
  78 nouveau_parent_create_(struct nouveau_object *parent,
  79                        struct nouveau_object *engine,
  80                        struct nouveau_oclass *oclass, u32 pclass,
  81                        struct nouveau_oclass *sclass, u64 engcls,
  82                        int size, void **pobject)
  83 {
  84         struct nouveau_parent *object;
  85         struct nouveau_sclass *nclass;
  86         int ret;
  87
  88         ret = nouveau_object_create_(parent, engine, oclass, pclass |
  89                                      NV_PARENT_CLASS, size, pobject);
  90         object = *pobject;
  91         if (ret)
  92                 return ret;
  93
  94         while (sclass && sclass->ofuncs) {
  95                 nclass = kzalloc(sizeof(*nclass), GFP_KERNEL);
  96                 if (!nclass)
  97                         return -ENOMEM;
  98
  99                 nclass->sclass = object->sclass;
 100                 object->sclass = nclass;
 101                 nclass->engine = engine ? nv_engine(engine) : NULL;
 102                 nclass->oclass = sclass;
 103                 sclass++;
 104         }
 105
 106         object->engine = engcls;
 107         return 0;
 108 }
 109
 110 void
 111 nouveau_parent_destroy(struct nouveau_parent *parent)
 112 {
 113         struct nouveau_sclass *sclass;
 114
 115         while ((sclass = parent->sclass)) {
 116                 parent->sclass = sclass->sclass;
 117                 kfree(sclass);
 118         }
 119
 120         nouveau_object_destroy(&parent->base);
 121 }
 122
 123
 124 void
 125 _nouveau_parent_dtor(struct nouveau_object *object)
 126 {
 127         nouveau_parent_destroy(nv_parent(object));
 128 }