/*
* Copyright (c) 2013-2015, Mellanox Technologies. 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_HW_UNRECOVERABLE_ERR = 0x8,
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_EQ_INV = 0xe,
MLX5_HEALTH_SYNDR_FFSER_ERR = 0xf,
MLX5_HEALTH_SYNDR_HIGH_TEMP = 0x10
};
static void health_care(struct work_struct *work)
{
struct mlx5_core_health *health;
struct mlx5_core_dev *dev;
struct mlx5_priv *priv;
health = container_of(work, struct mlx5_core_health, work);
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");
}
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_HW_UNRECOVERABLE_ERR:
return "unrecoverable hardware error";
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_EQ_INV:
return "Invalid EQ refrenced";
case MLX5_HEALTH_SYNDR_FFSER_ERR:
return "FFSER error";
case MLX5_HEALTH_SYNDR_HIGH_TEMP:
return "High temprature";
default:
return "unrecognized error";
}
}
static u16 get_maj(u32 fw)
{
return fw >> 28;
}
static u16 get_min(u32 fw)
{
return fw >> 16 & 0xfff;
}
static u16 get_sub(u32 fw)
{
return fw & 0xffff;
}
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;
char fw_str[18];
u32 fw;
int i;
for (i = 0; i < ARRAY_SIZE(h->assert_var); i++)
dev_err(&dev->pdev->dev, "assert_var[%d] 0x%08x\n", i, ioread32be(h->assert_var + i));
dev_err(&dev->pdev->dev, "assert_exit_ptr 0x%08x\n", ioread32be(&h->assert_exit_ptr));
dev_err(&dev->pdev->dev, "assert_callra 0x%08x\n", ioread32be(&h->assert_callra));
fw = ioread32be(&h->fw_ver);
sprintf(fw_str, "%d.%d.%d", get_maj(fw), get_min(fw), get_sub(fw));
dev_err(&dev->pdev->dev, "fw_ver %s\n", fw_str);
dev_err(&dev->pdev->dev, "hw_id 0x%08x\n", ioread32be(&h->hw_id));
dev_err(&dev->pdev->dev, "irisc_index %d\n", ioread8(&h->irisc_index));
dev_err(&dev->pdev->dev, "synd 0x%x: %s\n", ioread8(&h->synd), hsynd_str(ioread8(&h->synd)));
dev_err(&dev->pdev->dev, "ext_synd 0x%04x\n", ioread16be(&h->ext_synd));
}
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);
queue_work(health->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_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);
}
void mlx5_health_cleanup(struct mlx5_core_dev *dev)
{
struct mlx5_core_health *health = &dev->priv.health;
destroy_workqueue(health->wq);
}
int mlx5_health_init(struct mlx5_core_dev *dev)
{
struct mlx5_core_health *health;
char *name;
health = &dev->priv.health;
name = kmalloc(64, GFP_KERNEL);
if (!name)
return -ENOMEM;
strcpy(name, "mlx5_health");
strcat(name, dev_name(&dev->pdev->dev));
health->wq = create_singlethread_workqueue(name);
kfree(name);
if (!health->wq)
return -ENOMEM;
INIT_WORK(&health->work, health_care);
return 0;
}
