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Commit 309fa347 authored by Maor Gottlieb's avatar Maor Gottlieb Committed by Doug Ledford
Browse files

IB/mlx5: Add support for RSS on the inner packet 



Some user space application would like to do RSS on the inner
packet fields instead on the outer.
When MLX5_RX_HASH_INNER is set with one or more of the other
hash fields, then the RSS will be done using the inner packet.

Signed-off-by: default avatarMaor Gottlieb <maorg@mellanox.com>
Reviewed-by: default avatarMark Bloch <markb@mellanox.com>
Signed-off-by: default avatarLeon Romanovsky <leon@kernel.org>
Signed-off-by: default avatarDoug Ledford <dledford@redhat.com>
parent f95ef6cb

drivers/infiniband/hw/mlx5/qp.c

+11 −0
Original line number Diff line number Diff line
@@ -1403,6 +1403,12 @@ static int create_rss_raw_qp_tir(struct mlx5_ib_dev *dev, struct mlx5_ib_qp *qp, 
		return -EOPNOTSUPP;

	}



	if (ucmd.rx_hash_fields_mask & MLX5_RX_HASH_INNER &&

	    !(ucmd.flags & MLX5_QP_FLAG_TUNNEL_OFFLOADS)) {

		mlx5_ib_dbg(dev, "Tunnel offloads must be set for inner RSS\n");

		return -EOPNOTSUPP;

	}



	err = ib_copy_to_udata(udata, &resp, min_resp_len);

	if (err) {

		mlx5_ib_dbg(dev, "copy failed\n");
@@ -1426,6 +1432,11 @@ static int create_rss_raw_qp_tir(struct mlx5_ib_dev *dev, struct mlx5_ib_qp *qp, 
	if (ucmd.flags & MLX5_QP_FLAG_TUNNEL_OFFLOADS)

		MLX5_SET(tirc, tirc, tunneled_offload_en, 1);



	if (ucmd.rx_hash_fields_mask & MLX5_RX_HASH_INNER)

		hfso = MLX5_ADDR_OF(tirc, tirc, rx_hash_field_selector_inner);

	else

		hfso = MLX5_ADDR_OF(tirc, tirc, rx_hash_field_selector_outer);



	switch (ucmd.rx_hash_function) {

	case MLX5_RX_HASH_FUNC_TOEPLITZ:

	{

include/uapi/rdma/mlx5-abi.h

+3 −1
Original line number Diff line number Diff line
@@ -303,7 +303,9 @@ enum mlx5_rx_hash_fields { 
	MLX5_RX_HASH_SRC_PORT_TCP	= 1 << 4,

	MLX5_RX_HASH_DST_PORT_TCP	= 1 << 5,

	MLX5_RX_HASH_SRC_PORT_UDP	= 1 << 6,

	MLX5_RX_HASH_DST_PORT_UDP	= 1 << 7

	MLX5_RX_HASH_DST_PORT_UDP	= 1 << 7,

	/* Save bits for future fields */

	MLX5_RX_HASH_INNER		= 1 << 31

};



struct mlx5_ib_create_qp_rss {