LXR linux/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
  29int
  30nouveau_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
  77int
  78nouveau_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
 110void
 111nouveau_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
 124void
 125_nouveau_parent_dtor(struct nouveau_object *object)
 126{
 127        nouveau_parent_destroy(nv_parent(object));
 128}
 129