drivers/net/ethernet/mellanox/mlx5/core/en/monitor_stats.c

Source file repositories/reference/linux-study-clean/drivers/net/ethernet/mellanox/mlx5/core/en/monitor_stats.c

File Facts

System
Linux kernel
Corpus path
drivers/net/ethernet/mellanox/mlx5/core/en/monitor_stats.c
Extension
.c
Size
5466 bytes
Lines
170
Domain
Driver Families
Bucket
drivers/net
Inferred role
Driver Families: implementation source
Status
source implementation candidate

Why This File Exists

Repeatable hardware-adapter layer. Deep compatibility for every driver is out of scope; this atlas records patterns, probe lifecycles, bus glue, IRQ/DMA usage, and links back to core abstractions.

Dependency Surface

Detected Declarations

Annotated Snippet

#include "en.h"
#include "monitor_stats.h"
#include "lib/eq.h"

/* Driver will set the following watch counters list:
 * Ppcnt.802_3:
 * a_in_range_length_errors      Type: 0x0, Counter:  0x0, group_id = N/A
 * a_out_of_range_length_field   Type: 0x0, Counter:  0x1, group_id = N/A
 * a_frame_too_long_errors       Type: 0x0, Counter:  0x2, group_id = N/A
 * a_frame_check_sequence_errors Type: 0x0, Counter:  0x3, group_id = N/A
 * a_alignment_errors            Type: 0x0, Counter:  0x4, group_id = N/A
 * if_out_discards               Type: 0x0, Counter:  0x5, group_id = N/A
 * Q_Counters:
 * Q[index].rx_out_of_buffer   Type: 0x1, Counter:  0x4, group_id = counter_ix
 */

#define NUM_REQ_PPCNT_COUNTER_S1 MLX5_CMD_SET_MONITOR_NUM_PPCNT_COUNTER_SET1
#define NUM_REQ_Q_COUNTERS_S1    MLX5_CMD_SET_MONITOR_NUM_Q_COUNTERS_SET1

static int mlx5e_monitor_counter_cap(struct mlx5_core_dev *mdev)
{
	if (!MLX5_CAP_GEN(mdev, max_num_of_monitor_counters))
		return false;
	if (MLX5_CAP_PCAM_REG(mdev, ppcnt) &&
	    MLX5_CAP_GEN(mdev, num_ppcnt_monitor_counters) <
	    NUM_REQ_PPCNT_COUNTER_S1)
		return false;
	if (MLX5_CAP_GEN(mdev, num_q_monitor_counters) <
	    NUM_REQ_Q_COUNTERS_S1)
		return false;
	return true;
}

int mlx5e_monitor_counter_supported(struct mlx5e_priv *priv)
{
	struct mlx5_core_dev *pos;
	int i;

	mlx5_sd_for_each_dev(i, priv->mdev, pos)
		if (!mlx5e_monitor_counter_cap(pos))
			return false;
	return true;
}

static void mlx5e_monitor_counter_arm(struct mlx5_core_dev *mdev)
{
	u32 in[MLX5_ST_SZ_DW(arm_monitor_counter_in)] = {};

	MLX5_SET(arm_monitor_counter_in, in, opcode,
		 MLX5_CMD_OP_ARM_MONITOR_COUNTER);
	mlx5_cmd_exec_in(mdev, arm_monitor_counter, in);
}

static void mlx5e_monitor_counters_work(struct work_struct *work)
{
	struct mlx5e_priv *priv = container_of(work, struct mlx5e_priv,
					       monitor_counters_work);
	struct mlx5_core_dev *pos;
	int i;

	mutex_lock(&priv->state_lock);
	mlx5e_stats_update_ndo_stats(priv);
	mutex_unlock(&priv->state_lock);
	mlx5_sd_for_each_dev(i, priv->mdev, pos)
		mlx5e_monitor_counter_arm(pos);
}

static int mlx5e_monitor_event_handler(struct notifier_block *nb,
				       unsigned long event, void *eqe)
{
	struct mlx5e_priv *priv = mlx5_nb_cof(nb, struct mlx5e_priv,
					      monitor_counters_nb);
	queue_work(priv->wq, &priv->monitor_counters_work);
	return NOTIFY_OK;
}

static int fill_monitor_counter_ppcnt_set1(int cnt, u32 *in)
{
	enum mlx5_monitor_counter_ppcnt ppcnt_cnt;

	for (ppcnt_cnt = 0;
	     ppcnt_cnt < NUM_REQ_PPCNT_COUNTER_S1;
	     ppcnt_cnt++, cnt++) {
		MLX5_SET(set_monitor_counter_in, in,
			 monitor_counter[cnt].type,
			 MLX5_QUERY_MONITOR_CNT_TYPE_PPCNT);
		MLX5_SET(set_monitor_counter_in, in,
			 monitor_counter[cnt].counter,
			 ppcnt_cnt);
	}

Annotation

Implementation Notes