tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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
38enum {
39 MLX4_CATAS_POLL_INTERVAL = 5 * HZ,
40};
41
42static DEFINE_SPINLOCK(catas_lock);
43
44static LIST_HEAD(catas_list);
45static struct workqueue_struct *catas_wq;
46static struct work_struct catas_work;
47
48static int internal_err_reset = 1;
49module_param(internal_err_reset, int, 0644);
50MODULE_PARM_DESC(internal_err_reset,
51 "Reset device on internal errors if non-zero (default 1)");
52
53static 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
65static 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
87static 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
109void 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
135void 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
149int __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
160void mlx4_catas_cleanup(void)
161{
162 destroy_workqueue(catas_wq);
163}