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/*-
* Copyright (c) 2013-2015, Mellanox Technologies, Ltd. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. 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.
*
* THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS `AS IS' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD$
*/
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/random.h>
#include <linux/vmalloc.h>
#include <dev/mlx5/driver.h>
#include <dev/mlx5/mlx5_ifc.h>
#include "mlx5_core.h"
#define MLX5_HEALTH_POLL_INTERVAL (2 * HZ)
#define MAX_MISSES 3
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 mlx5_health_buffer __iomem *h = health->health;
int i;
for (i = 0; i < ARRAY_SIZE(h->assert_var); i++)
printf("mlx5_core: INFO: ""assert_var[%d] 0x%08x\n", i, read_be32(h->assert_var + i));
printf("mlx5_core: INFO: ""assert_exit_ptr 0x%08x\n", read_be32(&h->assert_exit_ptr));
printf("mlx5_core: INFO: ""assert_callra 0x%08x\n", read_be32(&h->assert_callra));
printf("mlx5_core: INFO: ""fw_ver 0x%08x\n", read_be32(&h->fw_ver));
printf("mlx5_core: INFO: ""hw_id 0x%08x\n", read_be32(&h->hw_id));
printf("mlx5_core: INFO: ""irisc_index %d\n", readb(&h->irisc_index));
printf("mlx5_core: INFO: ""synd 0x%x: %s\n", readb(&h->synd), hsynd_str(readb(&h->synd)));
printf("mlx5_core: 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;
int 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);
if (!queue_work(mlx5_core_wq, &health_work))
mlx5_core_warn(dev, "failed to queue health work\n");
} 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;
setup_timer(&health->timer, poll_health, (unsigned long)dev);
mod_timer(&health->timer,
round_jiffies(jiffies + MLX5_HEALTH_POLL_INTERVAL));
}
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);
}
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