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