kernel/drivers/gpu/drm/nouveau/nvkm/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 #include <core/parent.h>
  25 #include <core/client.h>
  26 #include <core/engine.h>
  27
  28 int
  29 nvkm_parent_sclass(struct nvkm_object *parent, u16 handle,
  30                    struct nvkm_object **pengine,
  31                    struct nvkm_oclass **poclass)
  32 {
  33         struct nvkm_sclass *sclass;
  34         struct nvkm_engine *engine;
  35         struct nvkm_oclass *oclass;
  36         u64 mask;
  37
  38         sclass = nv_parent(parent)->sclass;
  39         while (sclass) {
  40                 if ((sclass->oclass->handle & 0xffff) == handle) {
  41                         *pengine = &parent->engine->subdev.object;
  42                         *poclass = sclass->oclass;
  43                         return 0;
  44                 }
  45
  46                 sclass = sclass->sclass;
  47         }
  48
  49         mask = nv_parent(parent)->engine;
  50         while (mask) {
  51                 int i = __ffs64(mask);
  52
  53                 if (nv_iclass(parent, NV_CLIENT_CLASS))
  54                         engine = nv_engine(nv_client(parent)->device);
  55                 else
  56                         engine = nvkm_engine(parent, i);
  57
  58                 if (engine) {
  59                         oclass = engine->sclass;
  60                         while (oclass->ofuncs) {
  61                                 if ((oclass->handle & 0xffff) == handle) {
  62                                         *pengine = nv_object(engine);
  63                                         *poclass = oclass;
  64                                         return 0;
  65                                 }
  66                                 oclass++;
  67                         }
  68                 }
  69
  70                 mask &= ~(1ULL << i);
  71         }
  72
  73         return -EINVAL;
  74 }
  75
  76 int
  77 nvkm_parent_lclass(struct nvkm_object *parent, u32 *lclass, int size)
  78 {
  79         struct nvkm_sclass *sclass;
  80         struct nvkm_engine *engine;
  81         struct nvkm_oclass *oclass;
  82         int nr = -1, i;
  83         u64 mask;
  84
  85         sclass = nv_parent(parent)->sclass;
  86         while (sclass) {
  87                 if (++nr < size)
  88                         lclass[nr] = sclass->oclass->handle & 0xffff;
  89                 sclass = sclass->sclass;
  90         }
  91
  92         mask = nv_parent(parent)->engine;
  93         while (i = __ffs64(mask), mask) {
  94                 engine = nvkm_engine(parent, i);
  95                 if (engine && (oclass = engine->sclass)) {
  96                         while (oclass->ofuncs) {
  97                                 if (++nr < size)
  98                                         lclass[nr] = oclass->handle & 0xffff;
  99                                 oclass++;
 100                         }
 101                 }
 102
 103                 mask &= ~(1ULL << i);
 104         }
 105
 106         return nr + 1;
 107 }
 108
 109 int
 110 nvkm_parent_create_(struct nvkm_object *parent, struct nvkm_object *engine,
 111                     struct nvkm_oclass *oclass, u32 pclass,
 112                     struct nvkm_oclass *sclass, u64 engcls,
 113                     int size, void **pobject)
 114 {
 115         struct nvkm_parent *object;
 116         struct nvkm_sclass *nclass;
 117         int ret;
 118
 119         ret = nvkm_object_create_(parent, engine, oclass, pclass |
 120                                   NV_PARENT_CLASS, size, pobject);
 121         object = *pobject;
 122         if (ret)
 123                 return ret;
 124
 125         while (sclass && sclass->ofuncs) {
 126                 nclass = kzalloc(sizeof(*nclass), GFP_KERNEL);
 127                 if (!nclass)
 128                         return -ENOMEM;
 129
 130                 nclass->sclass = object->sclass;
 131                 object->sclass = nclass;
 132                 nclass->engine = engine ? nv_engine(engine) : NULL;
 133                 nclass->oclass = sclass;
 134                 sclass++;
 135         }
 136
 137         object->engine = engcls;
 138         return 0;
 139 }
 140
 141 void
 142 nvkm_parent_destroy(struct nvkm_parent *parent)
 143 {
 144         struct nvkm_sclass *sclass;
 145
 146         while ((sclass = parent->sclass)) {
 147                 parent->sclass = sclass->sclass;
 148                 kfree(sclass);
 149         }
 150
 151         nvkm_object_destroy(&parent->object);
 152 }
 153
 154
 155 void
 156 _nvkm_parent_dtor(struct nvkm_object *object)
 157 {
 158         nvkm_parent_destroy(nv_parent(object));
 159 }