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/*

 * Copyright (c) 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/workqueue.h>

#include "mlx4.h"

enum {

        MLX4_CATAS_POLL_INTERVAL        = 5 * HZ,

};

static DEFINE_SPINLOCK(catas_lock);

static LIST_HEAD(catas_list);

static struct workqueue_struct *catas_wq;

static struct work_struct catas_work;

static int internal_err_reset = 1;

module_param(internal_err_reset, int, 0644);

MODULE_PARM_DESC(internal_err_reset,

                 "Reset device on internal errors if non-zero (default 1)");

static void dump_err_buf(struct mlx4_dev *dev)

{

        struct mlx4_priv *priv = mlx4_priv(dev);

        int i;

        mlx4_err(dev, "Internal error detected:\n");

        for (i = 0; i < priv->fw.catas_size; ++i)

                mlx4_err(dev, "  buf[%02x]: %08x\n",

                         i, swab32(readl(priv->catas_err.map + i)));

}

static void poll_catas(unsigned long dev_ptr)

{

        struct mlx4_dev *dev = (struct mlx4_dev *) dev_ptr;

        struct mlx4_priv *priv = mlx4_priv(dev);

        if (readl(priv->catas_err.map)) {

                dump_err_buf(dev);

                mlx4_dispatch_event(dev, MLX4_EVENT_TYPE_LOCAL_CATAS_ERROR, 0, 0);

                if (internal_err_reset) {

                        spin_lock(&catas_lock);

                        list_add(&priv->catas_err.list, &catas_list);

                        spin_unlock(&catas_lock);

                        queue_work(catas_wq, &catas_work);

                }

        } else

                mod_timer(&priv->catas_err.timer,

                          round_jiffies(jiffies + MLX4_CATAS_POLL_INTERVAL));

}

static void catas_reset(struct work_struct *work)

{

        struct mlx4_priv *priv, *tmppriv;

        struct mlx4_dev *dev;

        LIST_HEAD(tlist);

        int ret;

        spin_lock_irq(&catas_lock);

        list_splice_init(&catas_list, &tlist);

        spin_unlock_irq(&catas_lock);

        list_for_each_entry_safe(priv, tmppriv, &tlist, catas_err.list) {

                ret = mlx4_restart_one(priv->dev.pdev);

                dev = &priv->dev;

                if (ret)

                        mlx4_err(dev, "Reset failed (%d)\n", ret);

                else

                        mlx4_dbg(dev, "Reset succeeded\n");

        }

}

void mlx4_start_catas_poll(struct mlx4_dev *dev)

{

        struct mlx4_priv *priv = mlx4_priv(dev);

        unsigned long addr;

        INIT_LIST_HEAD(&priv->catas_err.list);

        init_timer(&priv->catas_err.timer);

        priv->catas_err.map = NULL;

        addr = pci_resource_start(dev->pdev, priv->fw.catas_bar) +

                priv->fw.catas_offset;

        priv->catas_err.map = ioremap(addr, priv->fw.catas_size * 4);

        if (!priv->catas_err.map) {

                mlx4_warn(dev, "Failed to map internal error buffer at 0x%lx\n",

                          addr);

                return;

        }

        priv->catas_err.timer.data     = (unsigned long) dev;

        priv->catas_err.timer.function = poll_catas;

        priv->catas_err.timer.expires  =

                round_jiffies(jiffies + MLX4_CATAS_POLL_INTERVAL);

        add_timer(&priv->catas_err.timer);

}

void mlx4_stop_catas_poll(struct mlx4_dev *dev)

{

        struct mlx4_priv *priv = mlx4_priv(dev);

        del_timer_sync(&priv->catas_err.timer);

        if (priv->catas_err.map)

                iounmap(priv->catas_err.map);

        spin_lock_irq(&catas_lock);

        list_del(&priv->catas_err.list);

        spin_unlock_irq(&catas_lock);

}

int __init mlx4_catas_init(void)

{

        INIT_WORK(&catas_work, catas_reset);

        catas_wq = create_singlethread_workqueue("mlx4_err");

        if (!catas_wq)

                return -ENOMEM;

        return 0;

}

void mlx4_catas_cleanup(void)

{

        destroy_workqueue(catas_wq);

}