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
39enum {
40	MLX4_CATAS_POLL_INTERVAL	= 5 * HZ,
41};
42
43static DEFINE_SPINLOCK(catas_lock);
44
45static LIST_HEAD(catas_list);
46static struct work_struct catas_work;
47
48static int internal_err_reset = 1;
49module_param(internal_err_reset, int, 0644);
50MODULE_PARM_DESC(internal_err_reset,
51		 "Reset device on internal errors if non-zero"
52		 " (default 1, in SRIOV mode default is 0)");
53
54static void dump_err_buf(struct mlx4_dev *dev)
55{
56	struct mlx4_priv *priv = mlx4_priv(dev);
57
58	int i;
59
60	mlx4_err(dev, "Internal error detected:\n");
61	for (i = 0; i < priv->fw.catas_size; ++i)
62		mlx4_err(dev, "  buf[%02x]: %08x\n",
63			 i, swab32(readl(priv->catas_err.map + i)));
64}
65
66static void poll_catas(unsigned long dev_ptr)
67{
68	struct mlx4_dev *dev = (struct mlx4_dev *) dev_ptr;
69	struct mlx4_priv *priv = mlx4_priv(dev);
70
71	if (readl(priv->catas_err.map)) {
72		/* If the device is off-line, we cannot try to recover it */
73		if (pci_channel_offline(dev->pdev))
74			mod_timer(&priv->catas_err.timer,
75				  round_jiffies(jiffies + MLX4_CATAS_POLL_INTERVAL));
76		else {
77			dump_err_buf(dev);
78			mlx4_dispatch_event(dev, MLX4_DEV_EVENT_CATASTROPHIC_ERROR, 0);
79
80			if (internal_err_reset) {
81				spin_lock(&catas_lock);
82				list_add(&priv->catas_err.list, &catas_list);
83				spin_unlock(&catas_lock);
84
85				queue_work(mlx4_wq, &catas_work);
86			}
87		}
88	} else
89		mod_timer(&priv->catas_err.timer,
90			  round_jiffies(jiffies + MLX4_CATAS_POLL_INTERVAL));
91}
92
93static void catas_reset(struct work_struct *work)
94{
95	struct mlx4_priv *priv, *tmppriv;
96	struct mlx4_dev *dev;
97
98	LIST_HEAD(tlist);
99	int ret;
100
101	spin_lock_irq(&catas_lock);
102	list_splice_init(&catas_list, &tlist);
103	spin_unlock_irq(&catas_lock);
104
105	list_for_each_entry_safe(priv, tmppriv, &tlist, catas_err.list) {
106		struct pci_dev *pdev = priv->dev.pdev;
107
108		/* If the device is off-line, we cannot reset it */
109		if (pci_channel_offline(pdev))
110			continue;
111
112		ret = mlx4_restart_one(priv->dev.pdev);
113		/* 'priv' now is not valid */
114		if (ret)
115			pr_err("mlx4 %s: Reset failed (%d)\n",
116			       pci_name(pdev), ret);
117		else {
118			dev  = pci_get_drvdata(pdev);
119			mlx4_dbg(dev, "Reset succeeded\n");
120		}
121	}
122}
123
124void mlx4_start_catas_poll(struct mlx4_dev *dev)
125{
126	struct mlx4_priv *priv = mlx4_priv(dev);
127	phys_addr_t addr;
128
129	/*If we are in SRIOV the default of the module param must be 0*/
130	if (mlx4_is_mfunc(dev))
131		internal_err_reset = 0;
132
133	INIT_LIST_HEAD(&priv->catas_err.list);
134	init_timer(&priv->catas_err.timer);
135	priv->catas_err.map = NULL;
136
137	addr = pci_resource_start(dev->pdev, priv->fw.catas_bar) +
138		priv->fw.catas_offset;
139
140	priv->catas_err.map = ioremap(addr, priv->fw.catas_size * 4);
141	if (!priv->catas_err.map) {
142		mlx4_warn(dev, "Failed to map internal error buffer at 0x%llx\n",
143			  (unsigned long long) addr);
144		return;
145	}
146
147	priv->catas_err.timer.data     = (unsigned long) dev;
148	priv->catas_err.timer.function = poll_catas;
149	priv->catas_err.timer.expires  =
150		round_jiffies(jiffies + MLX4_CATAS_POLL_INTERVAL);
151	add_timer(&priv->catas_err.timer);
152}
153
154void mlx4_stop_catas_poll(struct mlx4_dev *dev)
155{
156	struct mlx4_priv *priv = mlx4_priv(dev);
157
158	del_timer_sync(&priv->catas_err.timer);
159
160	if (priv->catas_err.map)
161		iounmap(priv->catas_err.map);
162
163	spin_lock_irq(&catas_lock);
164	list_del(&priv->catas_err.list);
165	spin_unlock_irq(&catas_lock);
166}
167
168void  __init mlx4_catas_init(void)
169{
170	INIT_WORK(&catas_work, catas_reset);
171}
172