drivers/net/mlx4/catas.c

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