drivers/net/ethernet/mellanox/mlx5/core/en_selftest.c

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

File Facts

System
Linux kernel
Corpus path
drivers/net/ethernet/mellanox/mlx5/core/en_selftest.c
Extension
.c
Size
9120 bytes
Lines
379
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 mlx5ehdr {
	__be32 version;
	__be64 magic;
};

#ifdef CONFIG_INET
/* loopback test */
#define MLX5E_TEST_PKT_SIZE (sizeof(struct ethhdr) + sizeof(struct iphdr) +\
			     sizeof(struct udphdr) + sizeof(struct mlx5ehdr))
#define MLX5E_TEST_MAGIC 0x5AEED15C001ULL

static struct sk_buff *mlx5e_test_get_udp_skb(struct mlx5e_priv *priv)
{
	struct sk_buff *skb = NULL;
	struct mlx5ehdr *mlxh;
	struct ethhdr *ethh;
	struct udphdr *udph;
	struct iphdr *iph;
	int    iplen;

	skb = netdev_alloc_skb(priv->netdev, MLX5E_TEST_PKT_SIZE);
	if (!skb) {
		netdev_err(priv->netdev, "\tFailed to alloc loopback skb\n");
		return NULL;
	}

	net_prefetchw(skb->data);
	skb_reserve(skb, NET_IP_ALIGN);

	/*  Reserve for ethernet and IP header  */
	ethh = skb_push(skb, ETH_HLEN);
	skb_reset_mac_header(skb);

	skb_set_network_header(skb, skb->len);
	iph = skb_put(skb, sizeof(struct iphdr));

	skb_set_transport_header(skb, skb->len);
	udph = skb_put(skb, sizeof(struct udphdr));

	/* Fill ETH header */
	ether_addr_copy(ethh->h_dest, priv->netdev->dev_addr);
	eth_zero_addr(ethh->h_source);
	ethh->h_proto = htons(ETH_P_IP);

	/* Fill UDP header */
	udph->source = htons(9);
	udph->dest = htons(9); /* Discard Protocol */
	udph->len = htons(sizeof(struct mlx5ehdr) + sizeof(struct udphdr));
	udph->check = 0;

	/* Fill IP header */
	iph->ihl = 5;
	iph->ttl = 32;
	iph->version = 4;
	iph->protocol = IPPROTO_UDP;
	iplen = sizeof(struct iphdr) + sizeof(struct udphdr) +
		sizeof(struct mlx5ehdr);
	iph->tot_len = htons(iplen);
	iph->frag_off = 0;
	iph->saddr = 0;
	iph->daddr = 0;
	iph->tos = 0;
	iph->id = 0;
	ip_send_check(iph);

	/* Fill test header and data */
	mlxh = skb_put(skb, sizeof(*mlxh));
	mlxh->version = 0;
	mlxh->magic = cpu_to_be64(MLX5E_TEST_MAGIC);

	skb->csum = 0;
	skb->ip_summed = CHECKSUM_PARTIAL;
	udp4_hwcsum(skb, iph->saddr, iph->daddr);

	skb->protocol = htons(ETH_P_IP);
	skb->pkt_type = PACKET_HOST;
	skb->dev = priv->netdev;

	return skb;
}

struct mlx5e_lbt_priv {
	struct packet_type pt;
	struct completion comp;
	bool loopback_ok;
	bool local_lb;
};

static int
mlx5e_test_loopback_validate(struct sk_buff *skb,

Annotation

Implementation Notes