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Add function to detect the presence of a port module and use this

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function to error out early when no port module is present and doing
eeprom access. This also prevents error codes from filling up in
dmesg.

Sponsored by:	Mellanox Technologies
Tested by:	Netflix
MFC after:	1 week
This commit is contained in:
Hans Petter Selasky 2016-04-29 11:00:12 +00:00
parent 9340a8d5b9
commit 21dd652701
3 changed files with 18 additions and 1 deletions
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2
sys/dev/mlx5/driver.h
View file

@ -542,6 +542,7 @@ struct mlx5_core_dev {
atomic_t num_qps;
u32 issi;
struct mlx5_special_contexts special_contexts;
unsigned int module_status[MLX5_MAX_PORTS];
};
enum {
@ -835,6 +836,7 @@ int mlx5_set_port_mtu(struct mlx5_core_dev *dev, int mtu);
int mlx5_query_port_max_mtu(struct mlx5_core_dev *dev, int *max_mtu);
int mlx5_query_port_oper_mtu(struct mlx5_core_dev *dev, int *oper_mtu);
unsigned int mlx5_query_module_status(struct mlx5_core_dev *dev, int module_num);
int mlx5_query_module_num(struct mlx5_core_dev *dev, int *module_num);
int mlx5_query_eeprom(struct mlx5_core_dev *dev, int i2c_addr, int page_num,
int device_addr, int size, int module_num, u32 *data,

10
sys/dev/mlx5/mlx5_core/mlx5_eq.c
View file

@ -579,6 +579,13 @@ static const char *mlx5_port_module_event_error_type_to_string(u8 error_type)
}
}
unsigned int mlx5_query_module_status(struct mlx5_core_dev *dev, int module_num)
{
if (module_num < 0 || module_num >= MLX5_MAX_PORTS)
return 0; /* undefined */
return dev->module_status[module_num];
}
static void mlx5_port_module_event(struct mlx5_core_dev *dev,
struct mlx5_eqe *eqe)
{
@ -612,5 +619,8 @@ static void mlx5_port_module_event(struct mlx5_core_dev *dev,
default:
device_printf((&pdev->dev)->bsddev, "INFO: ""Module %u, unknown status", module_num);
}
/* store module status */
if (module_num < MLX5_MAX_PORTS)
dev->module_status[module_num] = module_status;
}

7
sys/dev/mlx5/mlx5_en/mlx5_en_main.c
View file

@ -2561,7 +2561,12 @@ out:
"reading is not supported\n");
goto err_i2c;
}
/* Check if module is present before doing an access */
if (mlx5_query_module_status(priv->mdev, module_num) !=
MLX5_MODULE_STATUS_PLUGGED) {
error = EINVAL;
goto err_i2c;
}
/*
* Currently 0XA0 and 0xA2 are the only addresses permitted.
* The internal conversion is as follows: