static int create_tir()

in mlx5/net/mlx5_vnet.c [1324:1364]

• 35 lines of code
• 2 McCabe index (conditional complexity)

static int create_tir(struct mlx5_vdpa_net *ndev)
{
#define HASH_IP_L4PORTS                                                                            \
	(MLX5_HASH_FIELD_SEL_SRC_IP | MLX5_HASH_FIELD_SEL_DST_IP | MLX5_HASH_FIELD_SEL_L4_SPORT |  \
	 MLX5_HASH_FIELD_SEL_L4_DPORT)
	static const u8 rx_hash_toeplitz_key[] = { 0x2c, 0xc6, 0x81, 0xd1, 0x5b, 0xdb, 0xf4, 0xf7,
						   0xfc, 0xa2, 0x83, 0x19, 0xdb, 0x1a, 0x3e, 0x94,
						   0x6b, 0x9e, 0x38, 0xd9, 0x2c, 0x9c, 0x03, 0xd1,
						   0xad, 0x99, 0x44, 0xa7, 0xd9, 0x56, 0x3d, 0x59,
						   0x06, 0x3c, 0x25, 0xf3, 0xfc, 0x1f, 0xdc, 0x2a };
	void *rss_key;
	void *outer;
	void *tirc;
	void *in;
	int err;

	in = kzalloc(MLX5_ST_SZ_BYTES(create_tir_in), GFP_KERNEL);
	if (!in)
		return -ENOMEM;

	MLX5_SET(create_tir_in, in, uid, ndev->mvdev.res.uid);
	tirc = MLX5_ADDR_OF(create_tir_in, in, ctx);
	MLX5_SET(tirc, tirc, disp_type, MLX5_TIRC_DISP_TYPE_INDIRECT);

	MLX5_SET(tirc, tirc, rx_hash_symmetric, 1);
	MLX5_SET(tirc, tirc, rx_hash_fn, MLX5_RX_HASH_FN_TOEPLITZ);
	rss_key = MLX5_ADDR_OF(tirc, tirc, rx_hash_toeplitz_key);
	memcpy(rss_key, rx_hash_toeplitz_key, sizeof(rx_hash_toeplitz_key));

	outer = MLX5_ADDR_OF(tirc, tirc, rx_hash_field_selector_outer);
	MLX5_SET(rx_hash_field_select, outer, l3_prot_type, MLX5_L3_PROT_TYPE_IPV4);
	MLX5_SET(rx_hash_field_select, outer, l4_prot_type, MLX5_L4_PROT_TYPE_TCP);
	MLX5_SET(rx_hash_field_select, outer, selected_fields, HASH_IP_L4PORTS);

	MLX5_SET(tirc, tirc, indirect_table, ndev->res.rqtn);
	MLX5_SET(tirc, tirc, transport_domain, ndev->res.tdn);

	err = mlx5_vdpa_create_tir(&ndev->mvdev, in, &ndev->res.tirn);
	kfree(in);
	return err;
}