parent.c

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/*
 * Copyright 2012 Red Hat Inc.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 * OTHER DEALINGS IN THE SOFTWARE.
 *
 * Authors: Ben Skeggs
 */

#include <core/object.h>
#include <core/parent.h>

int
nouveau_parent_sclass(struct nouveau_object *parent, u16 handle,
              struct nouveau_object **pengine,
              struct nouveau_oclass **poclass)
{
    struct nouveau_sclass *sclass;
    struct nouveau_engine *engine;
    struct nouveau_oclass *oclass;
    u64 mask;

    sclass = nv_parent(parent)->sclass;
    while (sclass) {
        if ((sclass->oclass->handle & 0xffff) == handle) {
            *pengine = parent->engine;
            *poclass = sclass->oclass;
            return 0;
        }

        sclass = sclass->sclass;
    }

    mask = nv_parent(parent)->engine;
    while (mask) {
        int i = ffsll(mask) - 1;

        if ((engine = nouveau_engine(parent, i))) {
            oclass = engine->sclass;
            while (oclass->ofuncs) {
                if ((oclass->handle & 0xffff) == handle) {
                    *pengine = nv_object(engine);
                    *poclass = oclass;
                    return 0;
                }
                oclass++;
            }
        }

        mask &= ~(1ULL << i);
    }

    return -EINVAL;
}

int
nouveau_parent_create_(struct nouveau_object *parent,
               struct nouveau_object *engine,
               struct nouveau_oclass *oclass, u32 pclass,
               struct nouveau_oclass *sclass, u64 engcls,
               int size, void **pobject)
{
    struct nouveau_parent *object;
    struct nouveau_sclass *nclass;
    int ret;

    ret = nouveau_object_create_(parent, engine, oclass, pclass |
                     NV_PARENT_CLASS, size, pobject);
    object = *pobject;
    if (ret)
        return ret;

    while (sclass && sclass->ofuncs) {
        nclass = kzalloc(sizeof(*nclass), GFP_KERNEL);
        if (!nclass)
            return -ENOMEM;

        nclass->sclass = object->sclass;
        object->sclass = nclass;
        nclass->engine = engine ? nv_engine(engine) : NULL;
        nclass->oclass = sclass;
        sclass++;
    }

    object->engine = engcls;
    return 0;
}

void
nouveau_parent_destroy(struct nouveau_parent *parent)
{
    struct nouveau_sclass *sclass;

    while ((sclass = parent->sclass)) {
        parent->sclass = sclass->sclass;
        kfree(sclass);
    }

    nouveau_object_destroy(&parent->base);
}


void
_nouveau_parent_dtor(struct nouveau_object *object)
{
    nouveau_parent_destroy(nv_parent(object));
}