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 * $Id$
33 */
34
35 #include <linux/jiffies.h>
36 #include <linux/timer.h>
37 #include <linux/workqueue.h>
38
39 #include "mthca_dev.h"
40
41 enum {
42 MTHCA_CATAS_POLL_INTERVAL = 5 * HZ,
43
44 MTHCA_CATAS_TYPE_INTERNAL = 0,
45 MTHCA_CATAS_TYPE_UPLINK = 3,
46 MTHCA_CATAS_TYPE_DDR = 4,
47 MTHCA_CATAS_TYPE_PARITY = 5,
48 };
49
50 static DEFINE_SPINLOCK(catas_lock);
51
52 static LIST_HEAD(catas_list);
53 static struct workqueue_struct *catas_wq;
54 static struct work_struct catas_work;
55
56 static int catas_reset_disable;
57 module_param_named(catas_reset_disable, catas_reset_disable, int, 0644);
58 MODULE_PARM_DESC(catas_reset_disable, "disable reset on catastrophic event if nonzero");
59
60 static void catas_reset(struct work_struct *work)
61 {
62 struct mthca_dev *dev, *tmpdev;
63 LIST_HEAD(tlist);
64 int ret;
65
66 mutex_lock(&mthca_device_mutex);
67
68 spin_lock_irq(&catas_lock);
69 list_splice_init(&catas_list, &tlist);
70 spin_unlock_irq(&catas_lock);
71
72 list_for_each_entry_safe(dev, tmpdev, &tlist, catas_err.list) {
73 ret = __mthca_restart_one(dev->pdev);
74 if (ret)
75 mthca_err(dev, "Reset failed (%d)\n", ret);
76 else
77 mthca_dbg(dev, "Reset succeeded\n");
78 }
79
80 mutex_unlock(&mthca_device_mutex);
81 }
82
83 static void handle_catas(struct mthca_dev *dev)
84 {
85 struct ib_event event;
86 unsigned long flags;
87 const char *type;
88 int i;
89
90 event.device = &dev->ib_dev;
91 event.event = IB_EVENT_DEVICE_FATAL;
92 event.element.port_num = 0;
93
94 ib_dispatch_event(&event);
95
96 switch (swab32(readl(dev->catas_err.map)) >> 24) {
97 case MTHCA_CATAS_TYPE_INTERNAL:
98 type = "internal error";
99 break;
100 case MTHCA_CATAS_TYPE_UPLINK:
101 type = "uplink bus error";
102 break;
103 case MTHCA_CATAS_TYPE_DDR:
104 type = "DDR data error";
105 break;
106 case MTHCA_CATAS_TYPE_PARITY:
107 type = "internal parity error";
108 break;
109 default:
110 type = "unknown error";
111 break;
112 }
113
114 mthca_err(dev, "Catastrophic error detected: %s\n", type);
115 for (i = 0; i < dev->catas_err.size; ++i)
116 mthca_err(dev, " buf[%02x]: %08x\n",
117 i, swab32(readl(dev->catas_err.map + i)));
118
119 if (catas_reset_disable)
120 return;
121
122 spin_lock_irqsave(&catas_lock, flags);
123 list_add(&dev->catas_err.list, &catas_list);
124 queue_work(catas_wq, &catas_work);
125 spin_unlock_irqrestore(&catas_lock, flags);
126 }
127
128 static void poll_catas(unsigned long dev_ptr)
129 {
130 struct mthca_dev *dev = (struct mthca_dev *) dev_ptr;
131 unsigned long flags;
132 int i;
133
134 for (i = 0; i < dev->catas_err.size; ++i)
135 if (readl(dev->catas_err.map + i)) {
136 handle_catas(dev);
137 return;
138 }
139
140 spin_lock_irqsave(&catas_lock, flags);
141 if (!dev->catas_err.stop)
142 mod_timer(&dev->catas_err.timer,
143 jiffies + MTHCA_CATAS_POLL_INTERVAL);
144 spin_unlock_irqrestore(&catas_lock, flags);
145
146 return;
147 }
148
149 void mthca_start_catas_poll(struct mthca_dev *dev)
150 {
151 unsigned long addr;
152
153 init_timer(&dev->catas_err.timer);
154 dev->catas_err.stop = 0;
155 dev->catas_err.map = NULL;
156
157 addr = pci_resource_start(dev->pdev, 0) +
158 ((pci_resource_len(dev->pdev, 0) - 1) &
159 dev->catas_err.addr);
160
161 if (!request_mem_region(addr, dev->catas_err.size * 4,
162 DRV_NAME)) {
163 mthca_warn(dev, "couldn't request catastrophic error region "
164 "at 0x%lx/0x%x\n", addr, dev->catas_err.size * 4);
165 return;
166 }
167
168 dev->catas_err.map = ioremap(addr, dev->catas_err.size * 4);
169 if (!dev->catas_err.map) {
170 mthca_warn(dev, "couldn't map catastrophic error region "
171 "at 0x%lx/0x%x\n", addr, dev->catas_err.size * 4);
172 release_mem_region(addr, dev->catas_err.size * 4);
173 return;
174 }
175
176 dev->catas_err.timer.data = (unsigned long) dev;
177 dev->catas_err.timer.function = poll_catas;
178 dev->catas_err.timer.expires = jiffies + MTHCA_CATAS_POLL_INTERVAL;
179 INIT_LIST_HEAD(&dev->catas_err.list);
180 add_timer(&dev->catas_err.timer);
181 }
182
183 void mthca_stop_catas_poll(struct mthca_dev *dev)
184 {
185 spin_lock_irq(&catas_lock);
186 dev->catas_err.stop = 1;
187 spin_unlock_irq(&catas_lock);
188
189 del_timer_sync(&dev->catas_err.timer);
190
191 if (dev->catas_err.map) {
192 iounmap(dev->catas_err.map);
193 release_mem_region(pci_resource_start(dev->pdev, 0) +
194 ((pci_resource_len(dev->pdev, 0) - 1) &
195 dev->catas_err.addr),
196 dev->catas_err.size * 4);
197 }
198
199 spin_lock_irq(&catas_lock);
200 list_del(&dev->catas_err.list);
201 spin_unlock_irq(&catas_lock);
202 }
203
204 int __init mthca_catas_init(void)
205 {
206 INIT_WORK(&catas_work, catas_reset);
207
208 catas_wq = create_singlethread_workqueue("mthca_catas");
209 if (!catas_wq)
210 return -ENOMEM;
211
212 return 0;
213 }
214
215 void mthca_catas_cleanup(void)
216 {
217 destroy_workqueue(catas_wq);
218 }
219
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