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NAME | SYNOPSIS | DESCRIPTION | ARGUMENTS | RETURN VALUE | SEE ALSO | COLOPHON |
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mlx5dv_devx_qp..._modify / query(3) mlx5dv_devx_qp..._modify / query(3)
mlx5dv_devx_qp_modify - Modifies a verbs QP via DEVX
mlx5dv_devx_qp_query - Queries a verbs QP via DEVX
mlx5dv_devx_cq_modify - Modifies a verbs CQ via DEVX
mlx5dv_devx_cq_query - Queries a verbs CQ via DEVX
mlx5dv_devx_srq_modify - Modifies a verbs SRQ via DEVX
mlx5dv_devx_srq_query - Queries a verbs SRQ via DEVX
mlx5dv_devx_wq_modify - Modifies a verbs WQ via DEVX
mlx5dv_devx_wq_query - Queries a verbs WQ via DEVX
mlx5dv_devx_ind_tbl_modify - Modifies a verbs indirection table
via DEVX
mlx5dv_devx_ind_tbl_query - Queries a verbs indirection table via
DEVX
#include <infiniband/mlx5dv.h>
int mlx5dv_devx_qp_modify(struct ibv_qp *qp, const void *in, size_t inlen,
void *out, size_t outlen);
int mlx5dv_devx_qp_query(struct ibv_qp *qp, const void *in, size_t inlen,
void *out, size_t outlen);
int mlx5dv_devx_cq_modify(struct ibv_cq *cq, const void *in, size_t inlen,
void *out, size_t outlen);
int mlx5dv_devx_cq_query(struct ibv_cq *cq, const void *in, size_t inlen,
void *out, size_t outlen);
int mlx5dv_devx_srq_modify(struct ibv_srq *srq, const void *in, size_t inlen,
void *out, size_t outlen);
int mlx5dv_devx_srq_query(struct ibv_srq *srq, const void *in, size_t inlen,
void *out, size_t outlen);
int mlx5dv_devx_wq_modify(struct ibv_wq *wq, const void *in, size_t inlen,
void *out, size_t outlen);
int mlx5dv_devx_wq_query(struct ibv_wq *wq, const void *in, size_t inlen,
void *out, size_t outlen);
int mlx5dv_devx_ind_tbl_modify(struct ibv_rwq_ind_table *ind_tbl,
const void *in, size_t inlen,
void *out, size_t outlen);
int mlx5dv_devx_ind_tbl_query(struct ibv_rwq_ind_table *ind_tbl,
const void *in, size_t inlen,
void *out, size_t outlen);
Modify / query a verb object over the DEVX interface.
The DEVX API enables direct access from the user space area to the
mlx5 device driver by using the KABI mechanism. The main purpose
is to make the user space driver as independent as possible from
the kernel so that future device functionality and commands can be
activated with minimal to none kernel changes.
The above APIs enables modifying/querying a verb object via the
DEVX interface. This enables interoperability between verbs and
DEVX. As such an application can use the create method from verbs
(e.g. ibv_create_qp) and modify and query the created object via
DEVX (e.g. mlx5dv_devx_qp_modify).
qp/cq/wq/srq/ind_tbl
The ibv_xxx object to issue the action on.
in A buffer which contains the command’s input data provided
in a device specification format.
inlen The size of in buffer in bytes.
out A buffer which contains the command’s output data according
to the device specification format.
outlen The size of out buffer in bytes.
Upon success 0 is returned or the value of errno on a failure.
If the error value is EREMOTEIO, outbox.status outbox.syndrome
will contain the command failure details.
mlx5dv_open_device, mlx5dv_devx_obj_create
#AUTHOR
Yishai Hadas ⟨yishaih@mellanox.com⟩
This page is part of the rdma-core (RDMA Core Userspace Libraries
and Daemons) project. Information about the project can be found
at ⟨https://github.com/linux-rdma/rdma-core⟩. If you have a bug
report for this manual page, send it to
linux-rdma@vger.kernel.org. This page was obtained from the
project's upstream Git repository
⟨https://github.com/linux-rdma/rdma-core.git⟩ on 2025-08-11. (At
that time, the date of the most recent commit that was found in
the repository was 2025-08-04.) If you discover any rendering
problems in this HTML version of the page, or you believe there is
a better or more up-to-date source for the page, or you have
corrections or improvements to the information in this COLOPHON
(which is not part of the original manual page), send a mail to
man-pages@man7.org
mlx5dv_devx_qp..._modify / query(3)
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HTML rendering created 2025-09-06 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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