| .\" -*- nroff -*- |
| .\" Licensed under the OpenIB.org (MIT) - See COPYING.md |
| .\" |
| .TH MLX4DV_QUERY_DEVICE 3 2017-06-27 1.0.0 |
| .SH "NAME" |
| mlx4dv_query_device \- Query device capabilities specific to mlx4 |
| .SH "SYNOPSIS" |
| .nf |
| .B #include <infiniband/mlx4dv.h> |
| .sp |
| .BI "int mlx4dv_query_device(struct ibv_context *ctx_in, |
| .BI " struct mlx4dv_context *attrs_out); |
| .fi |
| .SH "DESCRIPTION" |
| .B mlx4dv_query_device() |
| Query mlx4 specific device information that is usable via the direct verbs interface. |
| .PP |
| This function returns a version and compatibility mask. The version represents |
| the format of the internal hardware structures that mlx4dv.h exposes. |
| Future additions of new fields to the existing structures are handled by |
| the comp_mask field. |
| .PP |
| .nf |
| struct mlx4dv_context { |
| .in +8 |
| uint8_t version; |
| uint32_t max_inl_recv_sz; /* Maximum supported size of inline receive */ |
| uint64_t comp_mask; |
| .in -8 |
| }; |
| |
| .fi |
| .SH "RETURN VALUE" |
| 0 on success or the value of errno on failure (which indicates the failure reason). |
| .SH "NOTES" |
| * Compatibility mask (comp_mask) is an in/out field. |
| .SH "SEE ALSO" |
| .BR mlx4dv (7), |
| .BR ibv_query_device (3) |
| .SH "AUTHORS" |
| .TP |
| Maor Gottlieb <maorg@mellanox.com> |
