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 *
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
37enum {
38 MLX4_CATAS_POLL_INTERVAL = 5 * HZ,
39};
40
41static DEFINE_SPINLOCK(catas_lock);
42
43static LIST_HEAD(catas_list);
44static struct workqueue_struct *catas_wq;
45static struct work_struct catas_work;
46
47static int internal_err_reset = 1;
48module_param(internal_err_reset, int, 0644);
49MODULE_PARM_DESC(internal_err_reset,
50 "Reset device on internal errors if non-zero (default 1)");
51
52static 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
64static 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_EVENT_TYPE_LOCAL_CATAS_ERROR, 0, 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
86static 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
108void 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
134void 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
148int __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
159void mlx4_catas_cleanup(void)
160{
161 destroy_workqueue(catas_wq);
162}