1/*
2 * Copyright (c) 2007 Cisco Systems, Inc. All rights reserved.
3 * Copyright (c) 2007, 2008 Mellanox Technologies. All rights reserved.
4 *
5 * This software is available to you under a choice of one of two
6 * licenses.  You may choose to be licensed under the terms of the GNU
7 * General Public License (GPL) Version 2, available from the file
8 * COPYING in the main directory of this source tree, or the
9 * OpenIB.org BSD license below:
10 *
11 *     Redistribution and use in source and binary forms, with or
12 *     without modification, are permitted provided that the following
13 *     conditions are met:
14 *
15 *      - Redistributions of source code must retain the above
16 *        copyright notice, this list of conditions and the following
17 *        disclaimer.
18 *
19 *      - Redistributions in binary form must reproduce the above
20 *        copyright notice, this list of conditions and the following
21 *        disclaimer in the documentation and/or other materials
22 *        provided with the distribution.
23 *
24 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
25 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
26 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
27 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
28 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
29 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
30 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
31 * SOFTWARE.
32 */
33
34#include <linux/workqueue.h>
35#include <linux/module.h>
36
37#include "mlx4.h"
38
39#define MLX4_CATAS_POLL_INTERVAL        (5 * HZ)
40
41
42static DEFINE_SPINLOCK(catas_lock);
43
44static LIST_HEAD(catas_list);
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"
51		 " (default 1, in SRIOV mode default is 0)");
52
53static void dump_err_buf(struct mlx4_dev *dev)
54{
55	struct mlx4_priv *priv = mlx4_priv(dev);
56
57	int i;
58
59	mlx4_err(dev, "Internal error detected:\n");
60	for (i = 0; i < priv->fw.catas_size; ++i)
61		mlx4_err(dev, "  buf[%02x]: %08x\n",
62			 i, swab32(readl(priv->catas_err.map + i)));
63}
64
65static void poll_catas(unsigned long dev_ptr)
66{
67	struct mlx4_dev *dev = (struct mlx4_dev *) dev_ptr;
68	struct mlx4_priv *priv = mlx4_priv(dev);
69
70	if (readl(priv->catas_err.map)) {
71		/* If the device is off-line, we cannot try to recover it */
72		if (pci_channel_offline(dev->pdev))
73			mod_timer(&priv->catas_err.timer,
74				  round_jiffies(jiffies + MLX4_CATAS_POLL_INTERVAL));
75		else {
76			dump_err_buf(dev);
77			mlx4_dispatch_event(dev, MLX4_DEV_EVENT_CATASTROPHIC_ERROR, 0);
78
79			if (internal_err_reset) {
80				spin_lock(&catas_lock);
81				list_add(&priv->catas_err.list, &catas_list);
82				spin_unlock(&catas_lock);
83
84				queue_work(mlx4_wq, &catas_work);
85			}
86		}
87	} else
88		mod_timer(&priv->catas_err.timer,
89			  round_jiffies(jiffies + MLX4_CATAS_POLL_INTERVAL));
90}
91
92static void catas_reset(struct work_struct *work)
93{
94	struct mlx4_priv *priv, *tmppriv;
95	struct mlx4_dev *dev;
96
97	LIST_HEAD(tlist);
98	int ret;
99
100	spin_lock_irq(&catas_lock);
101	list_splice_init(&catas_list, &tlist);
102	spin_unlock_irq(&catas_lock);
103
104	list_for_each_entry_safe(priv, tmppriv, &tlist, catas_err.list) {
105		struct pci_dev *pdev = priv->dev.pdev;
106
107		/* If the device is off-line, we cannot reset it */
108		if (pci_channel_offline(pdev))
109			continue;
110
111		ret = mlx4_restart_one(priv->dev.pdev);
112		/* 'priv' now is not valid */
113		if (ret)
114			pr_err("mlx4 %s: Reset failed (%d)\n",
115			       pci_name(pdev), ret);
116		else {
117			dev  = pci_get_drvdata(pdev);
118			mlx4_dbg(dev, "Reset succeeded\n");
119		}
120	}
121}
122
123void mlx4_start_catas_poll(struct mlx4_dev *dev)
124{
125	struct mlx4_priv *priv = mlx4_priv(dev);
126	phys_addr_t addr;
127
128	/*If we are in SRIOV the default of the module param must be 0*/
129	if (mlx4_is_mfunc(dev))
130		internal_err_reset = 0;
131
132	INIT_LIST_HEAD(&priv->catas_err.list);
133	init_timer(&priv->catas_err.timer);
134	priv->catas_err.map = NULL;
135
136	addr = pci_resource_start(dev->pdev, priv->fw.catas_bar) +
137		priv->fw.catas_offset;
138
139	priv->catas_err.map = ioremap(addr, priv->fw.catas_size * 4);
140	if (!priv->catas_err.map) {
141		mlx4_warn(dev, "Failed to map internal error buffer at 0x%llx\n",
142			  (unsigned long long) addr);
143		return;
144	}
145
146	priv->catas_err.timer.data     = (unsigned long) dev;
147	priv->catas_err.timer.function = poll_catas;
148	priv->catas_err.timer.expires  =
149		round_jiffies(jiffies + MLX4_CATAS_POLL_INTERVAL);
150	add_timer(&priv->catas_err.timer);
151}
152
153void mlx4_stop_catas_poll(struct mlx4_dev *dev)
154{
155	struct mlx4_priv *priv = mlx4_priv(dev);
156
157	del_timer_sync(&priv->catas_err.timer);
158
159	if (priv->catas_err.map)
160		iounmap(priv->catas_err.map);
161
162	spin_lock_irq(&catas_lock);
163	list_del(&priv->catas_err.list);
164	spin_unlock_irq(&catas_lock);
165}
166
167void  __init mlx4_catas_init(void)
168{
169	INIT_WORK(&catas_work, catas_reset);
170}
171