1mlx5dv_create_cq(3)        mlx5 Programmer's Manual        mlx5dv_create_cq(3)
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NAME

6       mlx5dv_create_cq - creates a completion queue (CQ)
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SYNOPSIS

9              #include <infiniband/mlx5dv.h>
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11              struct ibv_cq_ex *mlx5dv_create_cq(struct ibv_context *context,
12                                 struct ibv_cq_init_attr_ex *cq_attr,
13                                 struct mlx5dv_cq_init_attr *mlx5_cq_attr);
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DESCRIPTION

16       mlx5dv_create_cq() creates a completion queue (CQ) with specific driver
17       properties.
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ARGUMENTS

20       Please see ibv_create_cq_ex(3) man page for context and cq_attr
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22   mlx5_cq_attr
23              struct mlx5dv_cq_init_attr {
24                  uint64_t comp_mask;
25                  uint8_t  cqe_comp_res_format;
26                  uint32_t flags;
27                  uint16_t cqe_size;
28              };
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30       comp_mask
31              Bitmask specifying what fields in the structure are valid:
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33              MLX5DV_CQ_INIT_ATTR_MASK_COMPRESSED_CQE enables creating a CQ in
34              a  mode that few CQEs may be compressed into a single CQE, valid
35              values in cqe_comp_res_format
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37              MLX5DV_CQ_INIT_ATTR_MASK_FLAGS valid values in flags
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39              MLX5DV_CQ_INIT_ATTR_MASK_CQE_SIZE valid values in cqe_size
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41       cqe_comp_res_format
42              A bitwise OR of the various CQE response formats of the  respon‐
43              der side:
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45              MLX5DV_CQE_RES_FORMAT_HASH CQE compression with hash
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47              MLX5DV_CQE_RES_FORMAT_CSUM CQE compression with RX checksum
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49              MLX5DV_CQE_RES_FORMAT_CSUM_STRIDX  CQE  compression  with stride
50              index
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52       flags  A bitwise OR of the various values described below:
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54              MLX5DV_CQ_INIT_ATTR_FLAGS_CQE_PAD create a padded 128B CQE
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56       cqe_size
57              configure the CQE size to be 64 or 128 bytes other  values  will
58              fail mlx5dv_create_cq.
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RETURN VALUE

61       mlx5dv_create_cq()  returns a pointer to the created CQ, or NULL if the
62       request fails and errno will be set.
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SEE ALSO

65       ibv_create_cq_ex(3),
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AUTHOR

68       Yonatan Cohen <yonatanc@mellanox.com>
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72mlx5                               2018-9-1                mlx5dv_create_cq(3)