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IB/mlx5: Add function to read WQE from user-space

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Add a helper function mlx5_ib_read_user_wqe to read information from
user-space owned work queues.  The function will be used in a later
patch by the page-fault handling code in mlx5_ib.

Signed-off-by: Haggai Eran <haggaie@mellanox.com>

[ Add stub for ib_umem_copy_from() for CONFIG_INFINIBAND_USER_MEM=n
  - Roland ]

Signed-off-by: Roland Dreier <roland@purestorage.com>
This commit is contained in:
Haggai Eran
2014-12-11 17:04:14 +02:00
committed by Roland Dreier
parent c5d76f130b
commit c1395a2a8c
4 changed files with 80 additions and 1 deletions
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3
include/linux/mlx5/qp.h
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@@ -189,6 +189,9 @@ struct mlx5_wqe_ctrl_seg {
__be32 imm;
};
#define MLX5_WQE_CTRL_DS_MASK 0x3f
#define MLX5_WQE_DS_UNITS 16
struct mlx5_wqe_xrc_seg {
__be32 xrc_srqn;
u8 rsvd[12];