drivers/net/ethernet/mellanox/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 #include <linux/module.h>
  36
  37 #include "mlx4.h"
  38
  39 enum {
  40         MLX4_CATAS_POLL_INTERVAL        = 5 * HZ,
  41 };
  42
  43 static DEFINE_SPINLOCK(catas_lock);
  44
  45 static LIST_HEAD(catas_list);
  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(mlx4_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                 struct pci_dev *pdev = priv->dev.pdev;
 101
 102                 ret = mlx4_restart_one(priv->dev.pdev);
 103                 /* 'priv' now is not valid */
 104                 if (ret)
 105                         pr_err("mlx4 %s: Reset failed (%d)\n",
 106                                pci_name(pdev), ret);
 107                 else {
 108                         dev  = pci_get_drvdata(pdev);
 109                         mlx4_dbg(dev, "Reset succeeded\n");
 110                 }
 111         }
 112 }
 113
 114 void mlx4_start_catas_poll(struct mlx4_dev *dev)
 115 {
 116         struct mlx4_priv *priv = mlx4_priv(dev);
 117         phys_addr_t addr;
 118
 119         INIT_LIST_HEAD(&priv->catas_err.list);
 120         init_timer(&priv->catas_err.timer);
 121         priv->catas_err.map = NULL;
 122
 123         addr = pci_resource_start(dev->pdev, priv->fw.catas_bar) +
 124                 priv->fw.catas_offset;
 125
 126         priv->catas_err.map = ioremap(addr, priv->fw.catas_size * 4);
 127         if (!priv->catas_err.map) {
 128                 mlx4_warn(dev, "Failed to map internal error buffer at 0x%llx\n",
 129                           (unsigned long long) addr);
 130                 return;
 131         }
 132
 133         priv->catas_err.timer.data     = (unsigned long) dev;
 134         priv->catas_err.timer.function = poll_catas;
 135         priv->catas_err.timer.expires  =
 136                 round_jiffies(jiffies + MLX4_CATAS_POLL_INTERVAL);
 137         add_timer(&priv->catas_err.timer);
 138 }
 139
 140 void mlx4_stop_catas_poll(struct mlx4_dev *dev)
 141 {
 142         struct mlx4_priv *priv = mlx4_priv(dev);
 143
 144         del_timer_sync(&priv->catas_err.timer);
 145
 146         if (priv->catas_err.map)
 147                 iounmap(priv->catas_err.map);
 148
 149         spin_lock_irq(&catas_lock);
 150         list_del(&priv->catas_err.list);
 151         spin_unlock_irq(&catas_lock);
 152 }
 153
 154 void  __init mlx4_catas_init(void)
 155 {
 156         INIT_WORK(&catas_work, catas_reset);
 157 }