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IB/mlx5: Allow creation of a multi-packet RQ

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Allow creation of a multi-packet receive queue.

In order to create a multi-packet RQ, the following fields in
the mlx5_ib_rwq should be set:
- log_num_strides: Log of number of strides per WQE
- single_stride_log_num_of_bytes: Log of a single stride size
- two_byte_shift_en: When enabled, hardware pads 2 bytes of zeros
  before writing the message to memory (e.g. for the IP alignment).

Signed-off-by: Noa Osherovich <noaos@mellanox.com>
Reviewed-by: Majd Dibbiny <majd@mellanox.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Doug Ledford <dledford@redhat.com>
This commit is contained in:
Noa Osherovich
2017-10-17 18:01:13 +03:00
committed by Doug Ledford
parent b4f34597a5
commit ccc8708790
4 changed files with 56 additions and 9 deletions
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include/linux/mlx5/mlx5_ifc.h
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@@ -744,6 +744,7 @@ enum {
MLX5_WQ_TYPE_LINKED_LIST = 0x0,
MLX5_WQ_TYPE_CYCLIC = 0x1,
MLX5_WQ_TYPE_LINKED_LIST_STRIDING_RQ = 0x2,
MLX5_WQ_TYPE_CYCLIC_STRIDING_RQ = 0x3,
};
enum {