This patch series enabled hardware to report Large Segment Offload(LSO) capabilities from kernel to user space. LSO enabled NIC will accept big chuck of data with the size greater than MTU. The LSO engine will split them into separate packets and insert the headers automatically. With LSO, CPU is offloaded from dealing with much less throughput of data. For detailed info about LSO, please refer to the following link: https://en.wikipedia.org/wiki/Large_segment_offload The capabilities are exposed to user space through query_device, ib_device_attr, and their relevant code is updated to build the pipe. The following capabilities will be reported: 1. The maximum payload size supported for segmentation by LSO engine. 2. QP types which support LSO operations. The capabilities of mlx5-related hardware are reported accordingly. This series conflicts with scatter FCS series that was posted earlier in this kernel cycle. The resolution for this conflict is available in Mellanox's git. Regards, Bodong and Majd. Bodong Wang (2): IB/core: Report LSO capabilities when querying device IB/mlx5: Report mlx5 LSO capabilities when querying device drivers/infiniband/core/uverbs_cmd.c | 7 +++++++ drivers/infiniband/hw/mlx5/main.c | 13 +++++++++++-- include/rdma/ib_verbs.h | 6 ++++++ include/uapi/rdma/ib_user_verbs.h | 6 ++++++ 4 files changed, 30 insertions(+), 2 deletions(-) -- 1.8.3.1 -- To unsubscribe from this list: send the line "unsubscribe linux-rdma" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
