drivers/net/ethernet/mellanox/mlx4/en_ethtool.c

Source file repositories/reference/linux-study-clean/drivers/net/ethernet/mellanox/mlx4/en_ethtool.c

File Facts

System
Linux kernel
Corpus path
drivers/net/ethernet/mellanox/mlx4/en_ethtool.c
Extension
.c
Size
62309 bytes
Lines
2181
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

struct bitmap_iterator {
	unsigned long *stats_bitmap;
	unsigned int count;
	unsigned int iterator;
	bool advance_array; /* if set, force no increments */
};

static inline void bitmap_iterator_init(struct bitmap_iterator *h,
					unsigned long *stats_bitmap,
					int count)
{
	h->iterator = 0;
	h->advance_array = !bitmap_empty(stats_bitmap, count);
	h->count = h->advance_array ? bitmap_weight(stats_bitmap, count)
		: count;
	h->stats_bitmap = stats_bitmap;
}

static inline int bitmap_iterator_test(struct bitmap_iterator *h)
{
	return !h->advance_array ? 1 : test_bit(h->iterator, h->stats_bitmap);
}

static inline int bitmap_iterator_inc(struct bitmap_iterator *h)
{
	return h->iterator++;
}

static inline unsigned int
bitmap_iterator_count(struct bitmap_iterator *h)
{
	return h->count;
}

static int mlx4_en_get_sset_count(struct net_device *dev, int sset)
{
	struct mlx4_en_priv *priv = netdev_priv(dev);
	struct bitmap_iterator it;

	bitmap_iterator_init(&it, priv->stats_bitmap.bitmap, NUM_ALL_STATS);

	switch (sset) {
	case ETH_SS_STATS:
		return bitmap_iterator_count(&it) +
			(priv->tx_ring_num[TX] * 2) +
			(priv->rx_ring_num * (3 + NUM_XDP_STATS));
	case ETH_SS_TEST:
		return MLX4_EN_NUM_SELF_TEST - !(priv->mdev->dev->caps.flags
					& MLX4_DEV_CAP_FLAG_UC_LOOPBACK) * 2;
	case ETH_SS_PRIV_FLAGS:
		return ARRAY_SIZE(mlx4_en_priv_flags);
	default:
		return -EOPNOTSUPP;
	}
}

static void mlx4_en_get_ethtool_stats(struct net_device *dev,
		struct ethtool_stats *stats, uint64_t *data)
{
	struct mlx4_en_priv *priv = netdev_priv(dev);
	int index = 0;
	int i;
	struct bitmap_iterator it;

	bitmap_iterator_init(&it, priv->stats_bitmap.bitmap, NUM_ALL_STATS);

	spin_lock_bh(&priv->stats_lock);

	mlx4_en_fold_software_stats(dev);

	for (i = 0; i < NUM_MAIN_STATS; i++, bitmap_iterator_inc(&it))
		if (bitmap_iterator_test(&it))
			data[index++] = ((unsigned long *)&dev->stats)[i];

	for (i = 0; i < NUM_PORT_STATS; i++, bitmap_iterator_inc(&it))
		if (bitmap_iterator_test(&it))
			data[index++] = ((unsigned long *)&priv->port_stats)[i];

	for (i = 0; i < NUM_PF_STATS; i++, bitmap_iterator_inc(&it))
		if (bitmap_iterator_test(&it))
			data[index++] =
				((unsigned long *)&priv->pf_stats)[i];

	for (i = 0; i < NUM_FLOW_PRIORITY_STATS_RX;
	     i++, bitmap_iterator_inc(&it))
		if (bitmap_iterator_test(&it))
			data[index++] =
				((u64 *)&priv->rx_priority_flowstats)[i];

	for (i = 0; i < NUM_FLOW_STATS_RX; i++, bitmap_iterator_inc(&it))

Annotation

Implementation Notes