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authorGuy Levi <guyle@mellanox.com>2018-03-15 16:56:40 +0200
committerJason Gunthorpe <jgg@mellanox.com>2018-03-15 15:58:05 -0600
commit6d06c9aa3816c26144f54d18c5b63ba9ff026fb9 (patch)
treec8c5f85355835c100308aa973d7611b1f40ca416 /drivers/infiniband/hw/mlx4/main.c
parent9c71172c4a2f6695fdfb89780da160f579a002c2 (diff)
downloadlinux-stericsson-6d06c9aa3816c26144f54d18c5b63ba9ff026fb9.tar.gz
IB/mlx4: Add Scatter FCS support over WQ creation
As a default, for Ethernet packets, the device scatters only the payload of ingress packets. The scatter FCS feature lets the user to get the FCS (Ethernet's frame check sequence) in the received WR's buffer as a 4 Bytes trailer following the packet's payload. Reviewed-by: Yishai Hadas <yishaih@mellanox.com> Signed-off-by: Guy Levi <guyle@mellanox.com> Signed-off-by: Leon Romanovsky <leon@kernel.org> Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Diffstat (limited to 'drivers/infiniband/hw/mlx4/main.c')
-rw-r--r--drivers/infiniband/hw/mlx4/main.c21
1 files changed, 13 insertions, 8 deletions
diff --git a/drivers/infiniband/hw/mlx4/main.c b/drivers/infiniband/hw/mlx4/main.c
index 88b0aef37bc4..b9befda1eb27 100644
--- a/drivers/infiniband/hw/mlx4/main.c
+++ b/drivers/infiniband/hw/mlx4/main.c
@@ -559,14 +559,19 @@ static int mlx4_ib_query_device(struct ib_device *ibdev,
props->timestamp_mask = 0xFFFFFFFFFFFFULL;
props->max_ah = INT_MAX;
- if ((dev->dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_RSS) &&
- (mlx4_ib_port_link_layer(ibdev, 1) == IB_LINK_LAYER_ETHERNET ||
- mlx4_ib_port_link_layer(ibdev, 2) == IB_LINK_LAYER_ETHERNET)) {
- props->rss_caps.max_rwq_indirection_tables = props->max_qp;
- props->rss_caps.max_rwq_indirection_table_size =
- dev->dev->caps.max_rss_tbl_sz;
- props->rss_caps.supported_qpts = 1 << IB_QPT_RAW_PACKET;
- props->max_wq_type_rq = props->max_qp;
+ if (mlx4_ib_port_link_layer(ibdev, 1) == IB_LINK_LAYER_ETHERNET ||
+ mlx4_ib_port_link_layer(ibdev, 2) == IB_LINK_LAYER_ETHERNET) {
+ if (dev->dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_RSS) {
+ props->rss_caps.max_rwq_indirection_tables =
+ props->max_qp;
+ props->rss_caps.max_rwq_indirection_table_size =
+ dev->dev->caps.max_rss_tbl_sz;
+ props->rss_caps.supported_qpts = 1 << IB_QPT_RAW_PACKET;
+ props->max_wq_type_rq = props->max_qp;
+ }
+
+ if (dev->dev->caps.flags & MLX4_DEV_CAP_FLAG_FCS_KEEP)
+ props->raw_packet_caps |= IB_RAW_PACKET_CAP_SCATTER_FCS;
}
props->cq_caps.max_cq_moderation_count = MLX4_MAX_CQ_COUNT;