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33#include <linux/kernel.h>
34#include <linux/module.h>
35#include <linux/random.h>
36#include <linux/vmalloc.h>
37#include <linux/mlx5/driver.h>
38#include <linux/mlx5/cmd.h>
39#include "mlx5_core.h"
40
41enum {
42 MLX5_HEALTH_POLL_INTERVAL = 2 * HZ,
43 MAX_MISSES = 3,
44};
45
46enum {
47 MLX5_HEALTH_SYNDR_FW_ERR = 0x1,
48 MLX5_HEALTH_SYNDR_IRISC_ERR = 0x7,
49 MLX5_HEALTH_SYNDR_CRC_ERR = 0x9,
50 MLX5_HEALTH_SYNDR_FETCH_PCI_ERR = 0xa,
51 MLX5_HEALTH_SYNDR_HW_FTL_ERR = 0xb,
52 MLX5_HEALTH_SYNDR_ASYNC_EQ_OVERRUN_ERR = 0xc,
53 MLX5_HEALTH_SYNDR_EQ_ERR = 0xd,
54 MLX5_HEALTH_SYNDR_FFSER_ERR = 0xf,
55};
56
57static DEFINE_SPINLOCK(health_lock);
58static LIST_HEAD(health_list);
59static struct work_struct health_work;
60
61static void health_care(struct work_struct *work)
62{
63 struct mlx5_core_health *health, *n;
64 struct mlx5_core_dev *dev;
65 struct mlx5_priv *priv;
66 LIST_HEAD(tlist);
67
68 spin_lock_irq(&health_lock);
69 list_splice_init(&health_list, &tlist);
70
71 spin_unlock_irq(&health_lock);
72
73 list_for_each_entry_safe(health, n, &tlist, list) {
74 priv = container_of(health, struct mlx5_priv, health);
75 dev = container_of(priv, struct mlx5_core_dev, priv);
76 mlx5_core_warn(dev, "handling bad device here\n");
77
78 spin_lock_irq(&health_lock);
79 list_del_init(&health->list);
80 spin_unlock_irq(&health_lock);
81 }
82}
83
84static const char *hsynd_str(u8 synd)
85{
86 switch (synd) {
87 case MLX5_HEALTH_SYNDR_FW_ERR:
88 return "firmware internal error";
89 case MLX5_HEALTH_SYNDR_IRISC_ERR:
90 return "irisc not responding";
91 case MLX5_HEALTH_SYNDR_CRC_ERR:
92 return "firmware CRC error";
93 case MLX5_HEALTH_SYNDR_FETCH_PCI_ERR:
94 return "ICM fetch PCI error";
95 case MLX5_HEALTH_SYNDR_HW_FTL_ERR:
96 return "HW fatal error\n";
97 case MLX5_HEALTH_SYNDR_ASYNC_EQ_OVERRUN_ERR:
98 return "async EQ buffer overrun";
99 case MLX5_HEALTH_SYNDR_EQ_ERR:
100 return "EQ error";
101 case MLX5_HEALTH_SYNDR_FFSER_ERR:
102 return "FFSER error";
103 default:
104 return "unrecognized error";
105 }
106}
107
108static u16 read_be16(__be16 __iomem *p)
109{
110 return swab16(readl((__force u16 __iomem *) p));
111}
112
113static u32 read_be32(__be32 __iomem *p)
114{
115 return swab32(readl((__force u32 __iomem *) p));
116}
117
118static void print_health_info(struct mlx5_core_dev *dev)
119{
120 struct mlx5_core_health *health = &dev->priv.health;
121 struct health_buffer __iomem *h = health->health;
122 int i;
123
124 for (i = 0; i < ARRAY_SIZE(h->assert_var); i++)
125 pr_info("assert_var[%d] 0x%08x\n", i, read_be32(h->assert_var + i));
126
127 pr_info("assert_exit_ptr 0x%08x\n", read_be32(&h->assert_exit_ptr));
128 pr_info("assert_callra 0x%08x\n", read_be32(&h->assert_callra));
129 pr_info("fw_ver 0x%08x\n", read_be32(&h->fw_ver));
130 pr_info("hw_id 0x%08x\n", read_be32(&h->hw_id));
131 pr_info("irisc_index %d\n", readb(&h->irisc_index));
132 pr_info("synd 0x%x: %s\n", readb(&h->synd), hsynd_str(readb(&h->synd)));
133 pr_info("ext_sync 0x%04x\n", read_be16(&h->ext_sync));
134}
135
136static void poll_health(unsigned long data)
137{
138 struct mlx5_core_dev *dev = (struct mlx5_core_dev *)data;
139 struct mlx5_core_health *health = &dev->priv.health;
140 unsigned long next;
141 u32 count;
142
143 count = ioread32be(health->health_counter);
144 if (count == health->prev)
145 ++health->miss_counter;
146 else
147 health->miss_counter = 0;
148
149 health->prev = count;
150 if (health->miss_counter == MAX_MISSES) {
151 mlx5_core_err(dev, "device's health compromised\n");
152 print_health_info(dev);
153 spin_lock_irq(&health_lock);
154 list_add_tail(&health->list, &health_list);
155 spin_unlock_irq(&health_lock);
156
157 queue_work(mlx5_core_wq, &health_work);
158 } else {
159 get_random_bytes(&next, sizeof(next));
160 next %= HZ;
161 next += jiffies + MLX5_HEALTH_POLL_INTERVAL;
162 mod_timer(&health->timer, next);
163 }
164}
165
166void mlx5_start_health_poll(struct mlx5_core_dev *dev)
167{
168 struct mlx5_core_health *health = &dev->priv.health;
169
170 INIT_LIST_HEAD(&health->list);
171 init_timer(&health->timer);
172 health->health = &dev->iseg->health;
173 health->health_counter = &dev->iseg->health_counter;
174
175 health->timer.data = (unsigned long)dev;
176 health->timer.function = poll_health;
177 health->timer.expires = round_jiffies(jiffies + MLX5_HEALTH_POLL_INTERVAL);
178 add_timer(&health->timer);
179}
180
181void mlx5_stop_health_poll(struct mlx5_core_dev *dev)
182{
183 struct mlx5_core_health *health = &dev->priv.health;
184
185 del_timer_sync(&health->timer);
186
187 spin_lock_irq(&health_lock);
188 if (!list_empty(&health->list))
189 list_del_init(&health->list);
190 spin_unlock_irq(&health_lock);
191}
192
193void mlx5_health_cleanup(void)
194{
195}
196
197void __init mlx5_health_init(void)
198{
199 INIT_WORK(&health_work, health_care);
200}
201
