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                 dump_err_buf(dev);
  73
  74                 mlx4_dispatch_event(dev, MLX4_DEV_EVENT_CATASTROPHIC_ERROR, 0);
  75
  76                 if (internal_err_reset) {
  77                         spin_lock(&catas_lock);
  78                         list_add(&priv->catas_err.list, &catas_list);
  79                         spin_unlock(&catas_lock);
  80
  81                         queue_work(mlx4_wq, &catas_work);
  82                 }
  83         } else
  84                 mod_timer(&priv->catas_err.timer,
  85                           round_jiffies(jiffies + MLX4_CATAS_POLL_INTERVAL));
  86 }
  87
  88 static void catas_reset(struct work_struct *work)
  89 {
  90         struct mlx4_priv *priv, *tmppriv;
  91         struct mlx4_dev *dev;
  92
  93         LIST_HEAD(tlist);
  94         int ret;
  95
  96         spin_lock_irq(&catas_lock);
  97         list_splice_init(&catas_list, &tlist);
  98         spin_unlock_irq(&catas_lock);
  99
 100         list_for_each_entry_safe(priv, tmppriv, &tlist, catas_err.list) {
 101                 struct pci_dev *pdev = priv->dev.pdev;
 102
 103                 ret = mlx4_restart_one(priv->dev.pdev);
 104                 /* 'priv' now is not valid */
 105                 if (ret)
 106                         pr_err("mlx4 %s: Reset failed (%d)\n",
 107                                pci_name(pdev), ret);
 108                 else {
 109                         dev  = pci_get_drvdata(pdev);
 110                         mlx4_dbg(dev, "Reset succeeded\n");
 111                 }
 112         }
 113 }
 114
 115 void mlx4_start_catas_poll(struct mlx4_dev *dev)
 116 {
 117         struct mlx4_priv *priv = mlx4_priv(dev);
 118         phys_addr_t addr;
 119
 120         /*If we are in SRIOV the default of the module param must be 0*/
 121         if (mlx4_is_mfunc(dev))
 122                 internal_err_reset = 0;
 123
 124         INIT_LIST_HEAD(&priv->catas_err.list);
 125         init_timer(&priv->catas_err.timer);
 126         priv->catas_err.map = NULL;
 127
 128         addr = pci_resource_start(dev->pdev, priv->fw.catas_bar) +
 129                 priv->fw.catas_offset;
 130
 131         priv->catas_err.map = ioremap(addr, priv->fw.catas_size * 4);
 132         if (!priv->catas_err.map) {
 133                 mlx4_warn(dev, "Failed to map internal error buffer at 0x%llx\n",
 134                           (unsigned long long) addr);
 135                 return;
 136         }
 137
 138         priv->catas_err.timer.data     = (unsigned long) dev;
 139         priv->catas_err.timer.function = poll_catas;
 140         priv->catas_err.timer.expires  =
 141                 round_jiffies(jiffies + MLX4_CATAS_POLL_INTERVAL);
 142         add_timer(&priv->catas_err.timer);
 143 }
 144
 145 void mlx4_stop_catas_poll(struct mlx4_dev *dev)
 146 {
 147         struct mlx4_priv *priv = mlx4_priv(dev);
 148
 149         del_timer_sync(&priv->catas_err.timer);
 150
 151         if (priv->catas_err.map)
 152                 iounmap(priv->catas_err.map);
 153
 154         spin_lock_irq(&catas_lock);
 155         list_del(&priv->catas_err.list);
 156         spin_unlock_irq(&catas_lock);
 157 }
 158
 159 void  __init mlx4_catas_init(void)
 160 {
 161         INIT_WORK(&catas_work, catas_reset);
 162 }