d6b92ffa99
kernel APIs. List of sources used: 1) rdma-core was cloned from "https://github.com/linux-rdma/rdma-core.git" Top commit d65138ef93af30b3ea249f3a84aa6a24ba7f8a75 2) OpenSM was cloned from git://git.openfabrics.org/~halr/opensm.git Top commit 85f841cf209f791c89a075048a907020e924528d 3) libibmad was cloned from "git://git.openfabrics.org/~iraweiny/libibmad.git" Tag 1.3.13 with some additional patches from Mellanox. 4) infiniband-diags was cloned from "git://git.openfabrics.org/~iraweiny/infiniband-diags.git" Tag 1.6.7 with some additional patches from Mellanox. Added the required Makefiles for building and installing. Sponsored by: Mellanox Technologies
52 lines
1.4 KiB
Groff
52 lines
1.4 KiB
Groff
.\" -*- nroff -*-
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.\" Licensed under the OpenIB.org (MIT) - See COPYING.md
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.\"
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.TH MLX5DV_QUERY_DEVICE 3 2017-02-02 1.0.0
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.SH "NAME"
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mlx5dv_query_device \- Query device capabilities specific to mlx5
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.SH "SYNOPSIS"
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.nf
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.B #include <infiniband/mlx5dv.h>
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.sp
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.BI "int mlx5dv_query_device(struct ibv_context *ctx_in,
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.BI " struct mlx5dv_context *attrs_out);
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.fi
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.SH "DESCRIPTION"
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.B mlx5dv_query_device()
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Query HW device-specific information which is important for data-path, but isn't provided by
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\fBibv_query_device\fR(3).
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.PP
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This function returns version, flags and compatibility mask. The version represents the format
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of the internal hardware structures that mlx5dv.h represents. Additions of new fields to the existed
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structures are handled by comp_mask field.
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.PP
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.nf
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struct mlx5dv_context {
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.in +8
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uint8_t version;
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uint64_t flags;
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uint64_t comp_mask;
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.in -8
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};
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enum mlx5dv_context_flags {
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.in +8
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/*
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* This flag indicates if CQE version 0 or 1 is needed.
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*/
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MLX5DV_CONTEXT_FLAGS_CQE_V1 = (1 << 0),
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MLX5DV_CONTEXT_FLAGS_MPW = (1 << 1), /* Multi packet WQE is supported or not */
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.in -8
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};
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.fi
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.SH "RETURN VALUE"
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0 on success or the value of errno on failure (which indicates the failure reason).
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.SH "NOTES"
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* Compatibility mask (comp_mask) is in/out field.
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.SH "SEE ALSO"
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.BR mlx5dv (7),
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.BR ibv_query_device (3)
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.SH "AUTHORS"
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.TP
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Leon Romanovsky <leonro@mellanox.com>
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