namedb.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/namedb.h>
#include <core/handle.h>
#include <core/gpuobj.h>

static struct nouveau_handle *
nouveau_namedb_lookup(struct nouveau_namedb *namedb, u32 name)
{
    struct nouveau_handle *handle;

    list_for_each_entry(handle, &namedb->list, node) {
        if (handle->name == name)
            return handle;
    }

    return NULL;
}

static struct nouveau_handle *
nouveau_namedb_lookup_class(struct nouveau_namedb *namedb, u16 oclass)
{
    struct nouveau_handle *handle;

    list_for_each_entry(handle, &namedb->list, node) {
        if (nv_mclass(handle->object) == oclass)
            return handle;
    }

    return NULL;
}

static struct nouveau_handle *
nouveau_namedb_lookup_vinst(struct nouveau_namedb *namedb, u64 vinst)
{
    struct nouveau_handle *handle;

    list_for_each_entry(handle, &namedb->list, node) {
        if (nv_iclass(handle->object, NV_GPUOBJ_CLASS)) {
            if (nv_gpuobj(handle->object)->addr == vinst)
                return handle;
        }
    }

    return NULL;
}

static struct nouveau_handle *
nouveau_namedb_lookup_cinst(struct nouveau_namedb *namedb, u32 cinst)
{
    struct nouveau_handle *handle;

    list_for_each_entry(handle, &namedb->list, node) {
        if (nv_iclass(handle->object, NV_GPUOBJ_CLASS)) {
            if (nv_gpuobj(handle->object)->node &&
                nv_gpuobj(handle->object)->node->offset == cinst)
                return handle;
        }
    }

    return NULL;
}

int
nouveau_namedb_insert(struct nouveau_namedb *namedb, u32 name,
              struct nouveau_object *object,
              struct nouveau_handle *handle)
{
    int ret = -EEXIST;
    write_lock_irq(&namedb->lock);
    if (!nouveau_namedb_lookup(namedb, name)) {
        nouveau_object_ref(object, &handle->object);
        handle->namedb = namedb;
        list_add(&handle->node, &namedb->list);
        ret = 0;
    }
    write_unlock_irq(&namedb->lock);
    return ret;
}

void
nouveau_namedb_remove(struct nouveau_handle *handle)
{
    struct nouveau_namedb *namedb = handle->namedb;
    struct nouveau_object *object = handle->object;
    write_lock_irq(&namedb->lock);
    list_del(&handle->node);
    write_unlock_irq(&namedb->lock);
    nouveau_object_ref(NULL, &object);
}

struct nouveau_handle *
nouveau_namedb_get(struct nouveau_namedb *namedb, u32 name)
{
    struct nouveau_handle *handle;
    read_lock(&namedb->lock);
    handle = nouveau_namedb_lookup(namedb, name);
    if (handle == NULL)
        read_unlock(&namedb->lock);
    return handle;
}

struct nouveau_handle *
nouveau_namedb_get_class(struct nouveau_namedb *namedb, u16 oclass)
{
    struct nouveau_handle *handle;
    read_lock(&namedb->lock);
    handle = nouveau_namedb_lookup_class(namedb, oclass);
    if (handle == NULL)
        read_unlock(&namedb->lock);
    return handle;
}

struct nouveau_handle *
nouveau_namedb_get_vinst(struct nouveau_namedb *namedb, u64 vinst)
{
    struct nouveau_handle *handle;
    read_lock(&namedb->lock);
    handle = nouveau_namedb_lookup_vinst(namedb, vinst);
    if (handle == NULL)
        read_unlock(&namedb->lock);
    return handle;
}

struct nouveau_handle *
nouveau_namedb_get_cinst(struct nouveau_namedb *namedb, u32 cinst)
{
    struct nouveau_handle *handle;
    read_lock(&namedb->lock);
    handle = nouveau_namedb_lookup_cinst(namedb, cinst);
    if (handle == NULL)
        read_unlock(&namedb->lock);
    return handle;
}

void
nouveau_namedb_put(struct nouveau_handle *handle)
{
    if (handle)
        read_unlock(&handle->namedb->lock);
}

int
nouveau_namedb_create_(struct nouveau_object *parent,
               struct nouveau_object *engine,
               struct nouveau_oclass *oclass, u32 pclass,
               struct nouveau_oclass *sclass, u32 engcls,
               int length, void **pobject)
{
    struct nouveau_namedb *namedb;
    int ret;

    ret = nouveau_parent_create_(parent, engine, oclass, pclass |
                     NV_NAMEDB_CLASS, sclass, engcls,
                     length, pobject);
    namedb = *pobject;
    if (ret)
        return ret;

    rwlock_init(&namedb->lock);
    INIT_LIST_HEAD(&namedb->list);
    return 0;
}

int
_nouveau_namedb_ctor(struct nouveau_object *parent,
             struct nouveau_object *engine,
             struct nouveau_oclass *oclass, void *data, u32 size,
             struct nouveau_object **pobject)
{
    struct nouveau_namedb *object;
    int ret;

    ret = nouveau_namedb_create(parent, engine, oclass, 0, NULL, 0, &object);
    *pobject = nv_object(object);
    if (ret)
        return ret;

    return 0;
}