drivers/net/mlx4/catas.c

   1 /*
   2  * Copyright (c) 2007 Cisco Systems, Inc. All rights reserved.
   3  * Copyright (c) 2007, 2008 Mellanox Technologies. All rights reserved.
   4  *
   5  * This software is available to you under a choice of one of two
   6  * licenses.  You may choose to be licensed under the terms of the GNU
   7  * General Public License (GPL) Version 2, available from the file
   8  * COPYING in the main directory of this source tree, or the
   9  * OpenIB.org BSD license below:
  10  *
  11  *     Redistribution and use in source and binary forms, with or
  12  *     without modification, are permitted provided that the following
  13  *     conditions are met:
  14  *
  15  *      - Redistributions of source code must retain the above
  16  *        copyright notice, this list of conditions and the following
  17  *        disclaimer.
  18  *
  19  *      - Redistributions in binary form must reproduce the above
  20  *        copyright notice, this list of conditions and the following
  21  *        disclaimer in the documentation and/or other materials
  22  *        provided with the distribution.
  23  *
  24  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  25  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  26  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  27  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  28  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  29  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  30  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  31  * SOFTWARE.
  32  */
  33
  34 #include <linux/workqueue.h>
  35
  36 #include "mlx4.h"
  37
  38 enum {
  39         MLX4_CATAS_POLL_INTERVAL        = 5 * HZ,
  40 };
  41
  42 static DEFINE_SPINLOCK(catas_lock);
  43
  44 static LIST_HEAD(catas_list);
  45 static struct workqueue_struct *catas_wq;
  46 static struct work_struct catas_work;
  47
  48 static int internal_err_reset = 1;
  49 module_param(internal_err_reset, int, 0644);
  50 MODULE_PARM_DESC(internal_err_reset,
  51                  "Reset device on internal errors if non-zero (default 1)");
  52
  53 static void dump_err_buf(struct mlx4_dev *dev)
  54 {
  55         struct mlx4_priv *priv = mlx4_priv(dev);
  56
  57         int i;
  58
  59         mlx4_err(dev, "Internal error detected:\n");
  60         for (i = 0; i < priv->fw.catas_size; ++i)
  61                 mlx4_err(dev, "  buf[%02x]: %08x\n",
  62                          i, swab32(readl(priv->catas_err.map + i)));
  63 }
  64
  65 static void poll_catas(unsigned long dev_ptr)
  66 {
  67         struct mlx4_dev *dev = (struct mlx4_dev *) dev_ptr;
  68         struct mlx4_priv *priv = mlx4_priv(dev);
  69
  70         if (readl(priv->catas_err.map)) {
  71                 dump_err_buf(dev);
  72
  73                 mlx4_dispatch_event(dev, MLX4_DEV_EVENT_CATASTROPHIC_ERROR, 0);
  74
  75                 if (internal_err_reset) {
  76                         spin_lock(&catas_lock);
  77                         list_add(&priv->catas_err.list, &catas_list);
  78                         spin_unlock(&catas_lock);
  79
  80                         queue_work(catas_wq, &catas_work);
  81                 }
  82         } else
  83                 mod_timer(&priv->catas_err.timer,
  84                           round_jiffies(jiffies + MLX4_CATAS_POLL_INTERVAL));
  85 }
  86
  87 static void catas_reset(struct work_struct *work)
  88 {
  89         struct mlx4_priv *priv, *tmppriv;
  90         struct mlx4_dev *dev;
  91
  92         LIST_HEAD(tlist);
  93         int ret;
  94
  95         spin_lock_irq(&catas_lock);
  96         list_splice_init(&catas_list, &tlist);
  97         spin_unlock_irq(&catas_lock);
  98
  99         list_for_each_entry_safe(priv, tmppriv, &tlist, catas_err.list) {
 100                 ret = mlx4_restart_one(priv->dev.pdev);
 101                 dev = &priv->dev;
 102                 if (ret)
 103                         mlx4_err(dev, "Reset failed (%d)\n", ret);
 104                 else
 105                         mlx4_dbg(dev, "Reset succeeded\n");
 106         }
 107 }
 108
 109 void mlx4_start_catas_poll(struct mlx4_dev *dev)
 110 {
 111         struct mlx4_priv *priv = mlx4_priv(dev);
 112         unsigned long addr;
 113
 114         INIT_LIST_HEAD(&priv->catas_err.list);
 115         init_timer(&priv->catas_err.timer);
 116         priv->catas_err.map = NULL;
 117
 118         addr = pci_resource_start(dev->pdev, priv->fw.catas_bar) +
 119                 priv->fw.catas_offset;
 120
 121         priv->catas_err.map = ioremap(addr, priv->fw.catas_size * 4);
 122         if (!priv->catas_err.map) {
 123                 mlx4_warn(dev, "Failed to map internal error buffer at 0x%lx\n",
 124                           addr);
 125                 return;
 126         }
 127
 128         priv->catas_err.timer.data     = (unsigned long) dev;
 129         priv->catas_err.timer.function = poll_catas;
 130         priv->catas_err.timer.expires  =
 131                 round_jiffies(jiffies + MLX4_CATAS_POLL_INTERVAL);
 132         add_timer(&priv->catas_err.timer);
 133 }
 134
 135 void mlx4_stop_catas_poll(struct mlx4_dev *dev)
 136 {
 137         struct mlx4_priv *priv = mlx4_priv(dev);
 138
 139         del_timer_sync(&priv->catas_err.timer);
 140
 141         if (priv->catas_err.map)
 142                 iounmap(priv->catas_err.map);
 143
 144         spin_lock_irq(&catas_lock);
 145         list_del(&priv->catas_err.list);
 146         spin_unlock_irq(&catas_lock);
 147 }
 148
 149 int __init mlx4_catas_init(void)
 150 {
 151         INIT_WORK(&catas_work, catas_reset);
 152
 153         catas_wq = create_singlethread_workqueue("mlx4_err");
 154         if (!catas_wq)
 155                 return -ENOMEM;
 156
 157         return 0;
 158 }
 159
 160 void mlx4_catas_cleanup(void)
 161 {
 162         destroy_workqueue(catas_wq);
 163 }