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net/mlx5_core: Fix internal error detection conditions 

The detection of a fatal condition has been updated to take into account
the state reported by the device or by detecting an all ones read of the
firmware version which indicates that the device is not accessible.

Signed-off-by: Eli Cohen <eli@mellanox.com>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eli Cohen 2015-10-14 17:43:45 +03:00 committed by David S. Miller
parent f985c65c90
commit fd76ee4da5
2 changed files with 45 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

51
drivers/net/ethernet/mellanox/mlx5/core/health.c
View File

@ -57,6 +57,31 @@ enum {
MLX5_HEALTH_SYNDR_HIGH_TEMP = 0x10
};
enum {
MLX5_NIC_IFC_FULL = 0,
MLX5_NIC_IFC_DISABLED = 1,
MLX5_NIC_IFC_NO_DRAM_NIC = 2
};
static u8 get_nic_interface(struct mlx5_core_dev *dev)
{
return (ioread32be(&dev->iseg->cmdq_addr_l_sz) >> 8) & 3;
}
static int in_fatal(struct mlx5_core_dev *dev)
{
struct mlx5_core_health *health = &dev->priv.health;
struct health_buffer __iomem *h = health->health;
if (get_nic_interface(dev) == MLX5_NIC_IFC_DISABLED)
return 1;
if (ioread32be(&h->fw_ver) == 0xffffffff)
return 1;
return 0;
}
static void health_care(struct work_struct *work)
{
struct mlx5_core_health *health;
@ -136,11 +161,21 @@ static void print_health_info(struct mlx5_core_dev *dev)
dev_err(&dev->pdev->dev, "ext_synd 0x%04x\n", ioread16be(&h->ext_synd));
}
static unsigned long get_next_poll_jiffies(void)
{
unsigned long next;
get_random_bytes(&next, sizeof(next));
next %= HZ;
next += jiffies + MLX5_HEALTH_POLL_INTERVAL;
return next;
}
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);
@ -151,14 +186,16 @@ static void poll_health(unsigned long data)
health->prev = count;
if (health->miss_counter == MAX_MISSES) {
mlx5_core_err(dev, "device's health compromised\n");
dev_err(&dev->pdev->dev, "device's health compromised - reached miss count\n");
print_health_info(dev);
} else {
mod_timer(&health->timer, get_next_poll_jiffies());
}
if (in_fatal(dev) && !health->sick) {
health->sick = true;
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);
}
}

1
include/linux/mlx5/driver.h
View File

@ -393,6 +393,7 @@ struct mlx5_core_health {
struct timer_list timer;
u32 prev;
int miss_counter;
bool sick;
struct workqueue_struct *wq;
struct work_struct work;
};