1 /*
2 * Copyright (c) 2005 Cisco Systems. 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/jiffies.h>
34 #include <linux/timer.h>
35 #include <linux/workqueue.h>
36
37 #include "mthca_dev.h"
38
39 enum {
40 MTHCA_CATAS_POLL_INTERVAL = 5 * HZ,
41
42 MTHCA_CATAS_TYPE_INTERNAL = 0,
43 MTHCA_CATAS_TYPE_UPLINK = 3,
44 MTHCA_CATAS_TYPE_DDR = 4,
45 MTHCA_CATAS_TYPE_PARITY = 5,
46 };
47
48 static DEFINE_SPINLOCK(catas_lock);
49
50 static LIST_HEAD(catas_list);
51 static struct workqueue_struct *catas_wq;
52 static struct work_struct catas_work;
53
54 static int catas_reset_disable;
55 module_param_named(catas_reset_disable, catas_reset_disable, int, 0644);
56 MODULE_PARM_DESC(catas_reset_disable, "disable reset on catastrophic event if nonzero");
57
58 static void catas_reset(struct work_struct *work)
59 {
60 struct mthca_dev *dev, *tmpdev;
61 LIST_HEAD(tlist);
62 int ret;
63
64 mutex_lock(&mthca_device_mutex);
65
66 spin_lock_irq(&catas_lock);
67 list_splice_init(&catas_list, &tlist);
68 spin_unlock_irq(&catas_lock);
69
70 list_for_each_entry_safe(dev, tmpdev, &tlist, catas_err.list) {
71 ret = __mthca_restart_one(dev->pdev);
72 if (ret)
73 mthca_err(dev, "Reset failed (%d)\n", ret);
74 else
75 mthca_dbg(dev, "Reset succeeded\n");
76 }
77
78 mutex_unlock(&mthca_device_mutex);
79 }
80
81 static void handle_catas(struct mthca_dev *dev)
82 {
83 struct ib_event event;
84 unsigned long flags;
85 const char *type;
86 int i;
87
88 event.device = &dev->ib_dev;
89 event.event = IB_EVENT_DEVICE_FATAL;
90 event.element.port_num = 0;
91
92 ib_dispatch_event(&event);
93
94 switch (swab32(readl(dev->catas_err.map)) >> 24) {
95 case MTHCA_CATAS_TYPE_INTERNAL:
96 type = "internal error";
97 break;
98 case MTHCA_CATAS_TYPE_UPLINK:
99 type = "uplink bus error";
100 break;
101 case MTHCA_CATAS_TYPE_DDR:
102 type = "DDR data error";
103 break;
104 case MTHCA_CATAS_TYPE_PARITY:
105 type = "internal parity error";
106 break;
107 default:
108 type = "unknown error";
109 break;
110 }
111
112 mthca_err(dev, "Catastrophic error detected: %s\n", type);
113 for (i = 0; i < dev->catas_err.size; ++i)
114 mthca_err(dev, " buf[%02x]: %08x\n",
115 i, swab32(readl(dev->catas_err.map + i)));
116
117 if (catas_reset_disable)
118 return;
119
120 spin_lock_irqsave(&catas_lock, flags);
121 list_add(&dev->catas_err.list, &catas_list);
122 queue_work(catas_wq, &catas_work);
123 spin_unlock_irqrestore(&catas_lock, flags);
124 }
125
126 static void poll_catas(unsigned long dev_ptr)
127 {
128 struct mthca_dev *dev = (struct mthca_dev *) dev_ptr;
129 int i;
130
131 for (i = 0; i < dev->catas_err.size; ++i)
132 if (readl(dev->catas_err.map + i)) {
133 handle_catas(dev);
134 return;
135 }
136
137 mod_timer(&dev->catas_err.timer,
138 round_jiffies(jiffies + MTHCA_CATAS_POLL_INTERVAL));
139 }
140
141 void mthca_start_catas_poll(struct mthca_dev *dev)
142 {
143 unsigned long addr;
144
145 init_timer(&dev->catas_err.timer);
146 dev->catas_err.map = NULL;
147
148 addr = pci_resource_start(dev->pdev, 0) +
149 ((pci_resource_len(dev->pdev, 0) - 1) &
150 dev->catas_err.addr);
151
152 dev->catas_err.map = ioremap(addr, dev->catas_err.size * 4);
153 if (!dev->catas_err.map) {
154 mthca_warn(dev, "couldn't map catastrophic error region "
155 "at 0x%lx/0x%x\n", addr, dev->catas_err.size * 4);
156 return;
157 }
158
159 dev->catas_err.timer.data = (unsigned long) dev;
160 dev->catas_err.timer.function = poll_catas;
161 dev->catas_err.timer.expires = jiffies + MTHCA_CATAS_POLL_INTERVAL;
162 INIT_LIST_HEAD(&dev->catas_err.list);
163 add_timer(&dev->catas_err.timer);
164 }
165
166 void mthca_stop_catas_poll(struct mthca_dev *dev)
167 {
168 del_timer_sync(&dev->catas_err.timer);
169
170 if (dev->catas_err.map)
171 iounmap(dev->catas_err.map);
172
173 spin_lock_irq(&catas_lock);
174 list_del(&dev->catas_err.list);
175 spin_unlock_irq(&catas_lock);
176 }
177
178 int __init mthca_catas_init(void)
179 {
180 INIT_WORK(&catas_work, catas_reset);
181
182 catas_wq = create_singlethread_workqueue("mthca_catas");
183 if (!catas_wq)
184 return -ENOMEM;
185
186 return 0;
187 }
188
189 void mthca_catas_cleanup(void)
190 {
191 destroy_workqueue(catas_wq);
192 }
193
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