summaryrefslogtreecommitdiff
path: root/drivers/net/ethernet/mellanox/mlx5/core/health.c
blob: 3e6670c4a7cd215998bf2302f2573acb8540ffb7 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
/*
 * Copyright (c) 2013, Mellanox Technologies inc.  All rights reserved.
 *
 * This software is available to you under a choice of one of two
 * licenses.  You may choose to be licensed under the terms of the GNU
 * General Public License (GPL) Version 2, available from the file
 * COPYING in the main directory of this source tree, or the
 * OpenIB.org BSD license below:
 *
 *     Redistribution and use in source and binary forms, with or
 *     without modification, are permitted provided that the following
 *     conditions are met:
 *
 *      - Redistributions of source code must retain the above
 *        copyright notice, this list of conditions and the following
 *        disclaimer.
 *
 *      - Redistributions in binary form must reproduce the above
 *        copyright notice, this list of conditions and the following
 *        disclaimer in the documentation and/or other materials
 *        provided with the distribution.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/random.h>
#include <linux/vmalloc.h>
#include <linux/mlx5/driver.h>
#include <linux/mlx5/cmd.h>
#include "mlx5_core.h"

enum {
	MLX5_HEALTH_POLL_INTERVAL	= 2 * HZ,
	MAX_MISSES			= 3,
};

enum {
	MLX5_HEALTH_SYNDR_FW_ERR		= 0x1,
	MLX5_HEALTH_SYNDR_IRISC_ERR		= 0x7,
	MLX5_HEALTH_SYNDR_CRC_ERR		= 0x9,
	MLX5_HEALTH_SYNDR_FETCH_PCI_ERR		= 0xa,
	MLX5_HEALTH_SYNDR_HW_FTL_ERR		= 0xb,
	MLX5_HEALTH_SYNDR_ASYNC_EQ_OVERRUN_ERR	= 0xc,
	MLX5_HEALTH_SYNDR_EQ_ERR		= 0xd,
	MLX5_HEALTH_SYNDR_FFSER_ERR		= 0xf,
};

static DEFINE_SPINLOCK(health_lock);
static LIST_HEAD(health_list);
static struct work_struct health_work;

static void health_care(struct work_struct *work)
{
	struct mlx5_core_health *health, *n;
	struct mlx5_core_dev *dev;
	struct mlx5_priv *priv;
	LIST_HEAD(tlist);

	spin_lock_irq(&health_lock);
	list_splice_init(&health_list, &tlist);

	spin_unlock_irq(&health_lock);

	list_for_each_entry_safe(health, n, &tlist, list) {
		priv = container_of(health, struct mlx5_priv, health);
		dev = container_of(priv, struct mlx5_core_dev, priv);
		mlx5_core_warn(dev, "handling bad device here\n");
		/* nothing yet */
		spin_lock_irq(&health_lock);
		list_del_init(&health->list);
		spin_unlock_irq(&health_lock);
	}
}

static const char *hsynd_str(u8 synd)
{
	switch (synd) {
	case MLX5_HEALTH_SYNDR_FW_ERR:
		return "firmware internal error";
	case MLX5_HEALTH_SYNDR_IRISC_ERR:
		return "irisc not responding";
	case MLX5_HEALTH_SYNDR_CRC_ERR:
		return "firmware CRC error";
	case MLX5_HEALTH_SYNDR_FETCH_PCI_ERR:
		return "ICM fetch PCI error";
	case MLX5_HEALTH_SYNDR_HW_FTL_ERR:
		return "HW fatal error\n";
	case MLX5_HEALTH_SYNDR_ASYNC_EQ_OVERRUN_ERR:
		return "async EQ buffer overrun";
	case MLX5_HEALTH_SYNDR_EQ_ERR:
		return "EQ error";
	case MLX5_HEALTH_SYNDR_FFSER_ERR:
		return "FFSER error";
	default:
		return "unrecognized error";
	}
}

static u16 read_be16(__be16 __iomem *p)
{
	return swab16(readl((__force u16 __iomem *) p));
}

static u32 read_be32(__be32 __iomem *p)
{
	return swab32(readl((__force u32 __iomem *) p));
}

static void print_health_info(struct mlx5_core_dev *dev)
{
	struct mlx5_core_health *health = &dev->priv.health;
	struct health_buffer __iomem *h = health->health;
	int i;

	for (i = 0; i < ARRAY_SIZE(h->assert_var); i++)
		pr_info("assert_var[%d] 0x%08x\n", i, read_be32(h->assert_var + i));

	pr_info("assert_exit_ptr 0x%08x\n", read_be32(&h->assert_exit_ptr));
	pr_info("assert_callra 0x%08x\n", read_be32(&h->assert_callra));
	pr_info("fw_ver 0x%08x\n", read_be32(&h->fw_ver));
	pr_info("hw_id 0x%08x\n", read_be32(&h->hw_id));
	pr_info("irisc_index %d\n", readb(&h->irisc_index));
	pr_info("synd 0x%x: %s\n", readb(&h->synd), hsynd_str(readb(&h->synd)));
	pr_info("ext_sync 0x%04x\n", read_be16(&h->ext_sync));
}

static void poll_health(unsigned long data)
{
	struct mlx5_core_dev *dev = (struct mlx5_core_dev *)data;
	struct mlx5_core_health *health = &dev->priv.health;
	unsigned long next;
	u32 count;

	count = ioread32be(health->health_counter);
	if (count == health->prev)
		++health->miss_counter;
	else
		health->miss_counter = 0;

	health->prev = count;
	if (health->miss_counter == MAX_MISSES) {
		mlx5_core_err(dev, "device's health compromised\n");
		print_health_info(dev);
		spin_lock_irq(&health_lock);
		list_add_tail(&health->list, &health_list);
		spin_unlock_irq(&health_lock);

		queue_work(mlx5_core_wq, &health_work);
	} else {
		get_random_bytes(&next, sizeof(next));
		next %= HZ;
		next += jiffies + MLX5_HEALTH_POLL_INTERVAL;
		mod_timer(&health->timer, next);
	}
}

void mlx5_start_health_poll(struct mlx5_core_dev *dev)
{
	struct mlx5_core_health *health = &dev->priv.health;

	INIT_LIST_HEAD(&health->list);
	init_timer(&health->timer);
	health->health = &dev->iseg->health;
	health->health_counter = &dev->iseg->health_counter;

	health->timer.data = (unsigned long)dev;
	health->timer.function = poll_health;
	health->timer.expires = round_jiffies(jiffies + MLX5_HEALTH_POLL_INTERVAL);
	add_timer(&health->timer);
}

void mlx5_stop_health_poll(struct mlx5_core_dev *dev)
{
	struct mlx5_core_health *health = &dev->priv.health;

	del_timer_sync(&health->timer);

	spin_lock_irq(&health_lock);
	if (!list_empty(&health->list))
		list_del_init(&health->list);
	spin_unlock_irq(&health_lock);
}

void mlx5_health_cleanup(void)
{
}

void  __init mlx5_health_init(void)
{
	INIT_WORK(&health_work, health_care);
}