From: Maor Gottlieb <maorg@mellanox.com>
Date: Thu, 19 Oct 2017 08:25:56 +0300
Subject: IB/mlx5: Add support for RSS on the inner packet
Patch-mainline: v4.15-rc1
Git-commit: 309fa3470fcaf96b295d2106ab17c00dbf7f3920
References: bsc#1103991 FATE#326007
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: Maor Gottlieb <maorg@mellanox.com>
Reviewed-by: Mark Bloch <markb@mellanox.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Doug Ledford <dledford@redhat.com>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
drivers/infiniband/hw/mlx5/qp.c | 11 +++++++++++
include/uapi/rdma/mlx5-abi.h | 4 +++-
2 files changed, 14 insertions(+), 1 deletion(-)
--- a/drivers/infiniband/hw/mlx5/qp.c
+++ b/drivers/infiniband/hw/mlx5/qp.c
@@ -1403,6 +1403,12 @@ static int create_rss_raw_qp_tir(struct
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
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:
{
--- a/include/uapi/rdma/mlx5-abi.h
+++ b/include/uapi/rdma/mlx5-abi.h
@@ -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 {