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/*
* 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 health_handler_t reg_handler;
int mlx5_register_health_report_handler(health_handler_t handler)
{
spin_lock_irq(&health_lock);
if (reg_handler) {
spin_unlock_irq(&health_lock);
return -EEXIST;
}
reg_handler = handler;
spin_unlock_irq(&health_lock);
return 0;
}
EXPORT_SYMBOL(mlx5_register_health_report_handler);
void mlx5_unregister_health_report_handler(void)
{
spin_lock_irq(&health_lock);
reg_handler = NULL;
spin_unlock_irq(&health_lock);
}
EXPORT_SYMBOL(mlx5_unregister_health_report_handler);
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");
spin_lock_irq(&health_lock);
if (reg_handler)
reg_handler(dev->pdev, health->health,
sizeof(health->health));
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);
}
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