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/*

 * Copyright (c) 2006, 2007 Cisco Systems, Inc. All rights reserved.

 *

 * This software is available to you under a choice of one of two

 * licenses.  You may choose to be licensed under the terms of the GNU

 * General Public License (GPL) Version 2, available from the file

 * COPYING in the main directory of this source tree, or the

 * OpenIB.org BSD license below:

 *

 *     Redistribution and use in source and binary forms, with or

 *     without modification, are permitted provided that the following

 *     conditions are met:

 *

 *      - Redistributions of source code must retain the above

 *        copyright notice, this list of conditions and the following

 *        disclaimer.

 *

 *      - Redistributions in binary form must reproduce the above

 *        copyright notice, this list of conditions and the following

 *        disclaimer in the documentation and/or other materials

 *        provided with the distribution.

 *

 * 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 AUTHORS OR COPYRIGHT HOLDERS

 * 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.

 */

#include <linux/mlx4/driver.h>

#include "mlx4.h"

struct mlx4_device_context {

        struct list_head        list;

        struct mlx4_interface  *intf;

        void                   *context;

};

static LIST_HEAD(intf_list);

static LIST_HEAD(dev_list);

static DEFINE_MUTEX(intf_mutex);

static void mlx4_add_device(struct mlx4_interface *intf, struct mlx4_priv *priv)

{

        struct mlx4_device_context *dev_ctx;

        dev_ctx = kmalloc(sizeof *dev_ctx, GFP_KERNEL);

        if (!dev_ctx)

                return;

        dev_ctx->intf    = intf;

        dev_ctx->context = intf->add(&priv->dev);

        if (dev_ctx->context) {

                spin_lock_irq(&priv->ctx_lock);

                list_add_tail(&dev_ctx->list, &priv->ctx_list);

                spin_unlock_irq(&priv->ctx_lock);

        } else

                kfree(dev_ctx);

}

static void mlx4_remove_device(struct mlx4_interface *intf, struct mlx4_priv *priv)

{

        struct mlx4_device_context *dev_ctx;

        list_for_each_entry(dev_ctx, &priv->ctx_list, list)

                if (dev_ctx->intf == intf) {

                        spin_lock_irq(&priv->ctx_lock);

                        list_del(&dev_ctx->list);

                        spin_unlock_irq(&priv->ctx_lock);

                        intf->remove(&priv->dev, dev_ctx->context);

                        kfree(dev_ctx);

                        return;

                }

}

int mlx4_register_interface(struct mlx4_interface *intf)

{

        struct mlx4_priv *priv;

        if (!intf->add || !intf->remove)

                return -EINVAL;

        mutex_lock(&intf_mutex);

        list_add_tail(&intf->list, &intf_list);

        list_for_each_entry(priv, &dev_list, dev_list)

                mlx4_add_device(intf, priv);

        mutex_unlock(&intf_mutex);

        return 0;

}

EXPORT_SYMBOL_GPL(mlx4_register_interface);

void mlx4_unregister_interface(struct mlx4_interface *intf)

{

        struct mlx4_priv *priv;

        mutex_lock(&intf_mutex);

        list_for_each_entry(priv, &dev_list, dev_list)

                mlx4_remove_device(intf, priv);

        list_del(&intf->list);

        mutex_unlock(&intf_mutex);

}

EXPORT_SYMBOL_GPL(mlx4_unregister_interface);

void mlx4_dispatch_event(struct mlx4_dev *dev, enum mlx4_event type,

                         int subtype, int port)

{

        struct mlx4_priv *priv = mlx4_priv(dev);

        struct mlx4_device_context *dev_ctx;

        unsigned long flags;

        spin_lock_irqsave(&priv->ctx_lock, flags);

        list_for_each_entry(dev_ctx, &priv->ctx_list, list)

                if (dev_ctx->intf->event)

                        dev_ctx->intf->event(dev, dev_ctx->context, type,

                                             subtype, port);

        spin_unlock_irqrestore(&priv->ctx_lock, flags);

}

int mlx4_register_device(struct mlx4_dev *dev)

{

        struct mlx4_priv *priv = mlx4_priv(dev);

        struct mlx4_interface *intf;

        mutex_lock(&intf_mutex);

        list_add_tail(&priv->dev_list, &dev_list);

        list_for_each_entry(intf, &intf_list, list)

                mlx4_add_device(intf, priv);

        mutex_unlock(&intf_mutex);

        mlx4_start_catas_poll(dev);

        return 0;

}

void mlx4_unregister_device(struct mlx4_dev *dev)

{

        struct mlx4_priv *priv = mlx4_priv(dev);

        struct mlx4_interface *intf;

        mlx4_stop_catas_poll(dev);

        mutex_lock(&intf_mutex);

        list_for_each_entry(intf, &intf_list, list)

                mlx4_remove_device(intf, priv);

        list_del(&priv->dev_list);

        mutex_unlock(&intf_mutex);

}