1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
|
/*
* Copyright (c) 2005 Cisco Systems. All rights reserved.
*
* This software is available to you under a choice of one of two
* licenses. You may choose to be licensed under the terms of the GNU
* General Public License (GPL) Version 2, available from the file
* COPYING in the main directory of this source tree, or the
* OpenIB.org BSD license below:
*
* Redistribution and use in source and binary forms, with or
* without modification, are permitted provided that the following
* conditions are met:
*
* - Redistributions of source code must retain the above
* copyright notice, this list of conditions and the following
* disclaimer.
*
* - Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#include <linux/jiffies.h>
#include <linux/timer.h>
#include <linux/workqueue.h>
#include "mthca_dev.h"
enum {
MTHCA_CATAS_POLL_INTERVAL = 5 * HZ,
MTHCA_CATAS_TYPE_INTERNAL = 0,
MTHCA_CATAS_TYPE_UPLINK = 3,
MTHCA_CATAS_TYPE_DDR = 4,
MTHCA_CATAS_TYPE_PARITY = 5,
};
static DEFINE_SPINLOCK(catas_lock);
static LIST_HEAD(catas_list);
static struct workqueue_struct *catas_wq;
static struct work_struct catas_work;
static int catas_reset_disable;
module_param_named(catas_reset_disable, catas_reset_disable, int, 0644);
MODULE_PARM_DESC(catas_reset_disable, "disable reset on catastrophic event if nonzero");
static void catas_reset(struct work_struct *work)
{
struct mthca_dev *dev, *tmpdev;
LIST_HEAD(tlist);
int ret;
mutex_lock(&mthca_device_mutex);
spin_lock_irq(&catas_lock);
list_splice_init(&catas_list, &tlist);
spin_unlock_irq(&catas_lock);
list_for_each_entry_safe(dev, tmpdev, &tlist, catas_err.list) {
struct pci_dev *pdev = dev->pdev;
ret = __mthca_restart_one(dev->pdev);
/* 'dev' now is not valid */
if (ret)
printk(KERN_ERR "mthca %s: Reset failed (%d)\n",
pci_name(pdev), ret);
else {
struct mthca_dev *d = pci_get_drvdata(pdev);
mthca_dbg(d, "Reset succeeded\n");
}
}
mutex_unlock(&mthca_device_mutex);
}
static void handle_catas(struct mthca_dev *dev)
{
struct ib_event event;
unsigned long flags;
const char *type;
int i;
event.device = &dev->ib_dev;
event.event = IB_EVENT_DEVICE_FATAL;
event.element.port_num = 0;
dev->active = false;
ib_dispatch_event(&event);
switch (swab32(readl(dev->catas_err.map)) >> 24) {
case MTHCA_CATAS_TYPE_INTERNAL:
type = "internal error";
break;
case MTHCA_CATAS_TYPE_UPLINK:
type = "uplink bus error";
break;
case MTHCA_CATAS_TYPE_DDR:
type = "DDR data error";
break;
case MTHCA_CATAS_TYPE_PARITY:
type = "internal parity error";
break;
default:
type = "unknown error";
break;
}
mthca_err(dev, "Catastrophic error detected: %s\n", type);
for (i = 0; i < dev->catas_err.size; ++i)
mthca_err(dev, " buf[%02x]: %08x\n",
i, swab32(readl(dev->catas_err.map + i)));
if (catas_reset_disable)
return;
spin_lock_irqsave(&catas_lock, flags);
list_add(&dev->catas_err.list, &catas_list);
queue_work(catas_wq, &catas_work);
spin_unlock_irqrestore(&catas_lock, flags);
}
static void poll_catas(unsigned long dev_ptr)
{
struct mthca_dev *dev = (struct mthca_dev *) dev_ptr;
int i;
for (i = 0; i < dev->catas_err.size; ++i)
if (readl(dev->catas_err.map + i)) {
handle_catas(dev);
return;
}
mod_timer(&dev->catas_err.timer,
round_jiffies(jiffies + MTHCA_CATAS_POLL_INTERVAL));
}
void mthca_start_catas_poll(struct mthca_dev *dev)
{
unsigned long addr;
init_timer(&dev->catas_err.timer);
dev->catas_err.map = NULL;
addr = pci_resource_start(dev->pdev, 0) +
((pci_resource_len(dev->pdev, 0) - 1) &
dev->catas_err.addr);
dev->catas_err.map = ioremap(addr, dev->catas_err.size * 4);
if (!dev->catas_err.map) {
mthca_warn(dev, "couldn't map catastrophic error region "
"at 0x%lx/0x%x\n", addr, dev->catas_err.size * 4);
return;
}
dev->catas_err.timer.data = (unsigned long) dev;
dev->catas_err.timer.function = poll_catas;
dev->catas_err.timer.expires = jiffies + MTHCA_CATAS_POLL_INTERVAL;
INIT_LIST_HEAD(&dev->catas_err.list);
add_timer(&dev->catas_err.timer);
}
void mthca_stop_catas_poll(struct mthca_dev *dev)
{
del_timer_sync(&dev->catas_err.timer);
if (dev->catas_err.map)
iounmap(dev->catas_err.map);
spin_lock_irq(&catas_lock);
list_del(&dev->catas_err.list);
spin_unlock_irq(&catas_lock);
}
int __init mthca_catas_init(void)
{
INIT_WORK(&catas_work, catas_reset);
catas_wq = create_singlethread_workqueue("mthca_catas");
if (!catas_wq)
return -ENOMEM;
return 0;
}
void mthca_catas_cleanup(void)
{
destroy_workqueue(catas_wq);
}
|
