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"
  52                  " (default 1, in SRIOV mode default is 0)");
  53
  54 static void dump_err_buf(struct mlx4_dev *dev)
  55 {
  56         struct mlx4_priv *priv = mlx4_priv(dev);
  57
  58         int i;
  59
  60         mlx4_err(dev, "Internal error detected:\n");
  61         for (i = 0; i < priv->fw.catas_size; ++i)
  62                 mlx4_err(dev, "  buf[%02x]: %08x\n",
  63                          i, swab32(readl(priv->catas_err.map + i)));
  64 }
  65
  66 static void poll_catas(unsigned long dev_ptr)
  67 {
  68         struct mlx4_dev *dev = (struct mlx4_dev *) dev_ptr;
  69         struct mlx4_priv *priv = mlx4_priv(dev);
  70
  71         if (readl(priv->catas_err.map)) {
  72                 /* If the device is off-line, we cannot try to recover it */
  73                 if (pci_channel_offline(dev->pdev))
  74                         mod_timer(&priv->catas_err.timer,
  75                                   round_jiffies(jiffies + MLX4_CATAS_POLL_INTERVAL));
  76                 else {
  77                         dump_err_buf(dev);
  78                         mlx4_dispatch_event(dev, MLX4_DEV_EVENT_CATASTROPHIC_ERROR, 0);
  79
  80                         if (internal_err_reset) {
  81                                 spin_lock(&catas_lock);
  82                                 list_add(&priv->catas_err.list, &catas_list);
  83                                 spin_unlock(&catas_lock);
  84
  85                                 queue_work(mlx4_wq, &catas_work);
  86                         }
  87                 }
  88         } else
  89                 mod_timer(&priv->catas_err.timer,
  90                           round_jiffies(jiffies + MLX4_CATAS_POLL_INTERVAL));
  91 }
  92
  93 static void catas_reset(struct work_struct *work)
  94 {
  95         struct mlx4_priv *priv, *tmppriv;
  96         struct mlx4_dev *dev;
  97
  98         LIST_HEAD(tlist);
  99         int ret;
 100
 101         spin_lock_irq(&catas_lock);
 102         list_splice_init(&catas_list, &tlist);
 103         spin_unlock_irq(&catas_lock);
 104
 105         list_for_each_entry_safe(priv, tmppriv, &tlist, catas_err.list) {
 106                 struct pci_dev *pdev = priv->dev.pdev;
 107
 108                 /* If the device is off-line, we cannot reset it */
 109                 if (pci_channel_offline(pdev))
 110                         continue;
 111
 112                 ret = mlx4_restart_one(priv->dev.pdev);
 113                 /* 'priv' now is not valid */
 114                 if (ret)
 115                         pr_err("mlx4 %s: Reset failed (%d)\n",
 116                                pci_name(pdev), ret);
 117                 else {
 118                         dev  = pci_get_drvdata(pdev);
 119                         mlx4_dbg(dev, "Reset succeeded\n");
 120                 }
 121         }
 122 }
 123
 124 void mlx4_start_catas_poll(struct mlx4_dev *dev)
 125 {
 126         struct mlx4_priv *priv = mlx4_priv(dev);
 127         phys_addr_t addr;
 128
 129         /*If we are in SRIOV the default of the module param must be 0*/
 130         if (mlx4_is_mfunc(dev))
 131                 internal_err_reset = 0;
 132
 133         INIT_LIST_HEAD(&priv->catas_err.list);
 134         init_timer(&priv->catas_err.timer);
 135         priv->catas_err.map = NULL;
 136
 137         addr = pci_resource_start(dev->pdev, priv->fw.catas_bar) +
 138                 priv->fw.catas_offset;
 139
 140         priv->catas_err.map = ioremap(addr, priv->fw.catas_size * 4);
 141         if (!priv->catas_err.map) {
 142                 mlx4_warn(dev, "Failed to map internal error buffer at 0x%llx\n",
 143                           (unsigned long long) addr);
 144                 return;
 145         }
 146
 147         priv->catas_err.timer.data     = (unsigned long) dev;
 148         priv->catas_err.timer.function = poll_catas;
 149         priv->catas_err.timer.expires  =
 150                 round_jiffies(jiffies + MLX4_CATAS_POLL_INTERVAL);
 151         add_timer(&priv->catas_err.timer);
 152 }
 153
 154 void mlx4_stop_catas_poll(struct mlx4_dev *dev)
 155 {
 156         struct mlx4_priv *priv = mlx4_priv(dev);
 157
 158         del_timer_sync(&priv->catas_err.timer);
 159
 160         if (priv->catas_err.map)
 161                 iounmap(priv->catas_err.map);
 162
 163         spin_lock_irq(&catas_lock);
 164         list_del(&priv->catas_err.list);
 165         spin_unlock_irq(&catas_lock);
 166 }
 167
 168 void  __init mlx4_catas_init(void)
 169 {
 170         INIT_WORK(&catas_work, catas_reset);
 171 }