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NAME | SYNOPSIS | DESCRIPTION | ARGUMENTS | RETURN VALUE | SEE ALSO | AUTHORS | COLOPHON |
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IONIC_DV...UDMA_MASK(3) Ionic Programmer’s Manual IONIC_DV...UDMA_MASK(3)
ionic_dv_pd_set_udma_mask - Restrict UDMA pipeline IDs of a
protection domain
#include <infiniband/ionic_dv.h>
int ionic_dv_pd_set_udma_mask(struct ibv_pd *ibpd, uint8_t udma_mask);
ionic_dv_pd_set_udma_mask() restricts the UDMA pipelines available
for queues created under the protection domain or parent domain
ibpd. Queues created after this call will be assigned to one of
the pipelines enabled by udma_mask.
The udma_mask must be a subset of the device’s available UDMA
pipelines, as returned by ionic_dv_ctx_get_udma_mask(3).
Changing the UDMA mask of a protection domain has no effect on
previously created queues.
The recommended usage pattern is:
1. Create a protection domain with ibv_alloc_pd(3).
2. Create parent domains of that PD for each desired UDMA mask
using ibv_alloc_parent_domain(3).
3. Set the desired UDMA mask on each parent domain with this
function.
4. Create queues associated with the parent domain that has the
desired UDMA mask.
An alternative usage is to create a single PD and change its UDMA
mask before creating each queue.
ibpd The protection domain or parent domain to modify. Must be
an ionic protection domain.
udma_mask
A bitmask of UDMA pipeline IDs to enable. Must be a subset
of the mask returned by ionic_dv_ctx_get_udma_mask(3).
Returns 0 on success, or a positive errno value on failure:
EPERM ibpd is not an ionic protection domain.
EINVAL udma_mask contains bits not present in the device’s UDMA
mask.
ionicdv(7), ionic_dv_pd_get_udma_mask(3),
ionic_dv_ctx_get_udma_mask(3), ionic_dv_ctx_get_udma_count(3),
ibv_alloc_pd(3), ibv_alloc_parent_domain(3)
Advanced Micro Devices, Inc.
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 2026-08-04. (At
that time, the date of the most recent commit that was found in
the repository was 2026-07-22.) 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
ionic 2025-06-23 IONIC_DV...UDMA_MASK(3)
Pages that refer to this page: ionic_dv_ctx_get_udma_count(3), ionic_dv_ctx_get_udma_mask(3), ionic_dv_pd_get_udma_mask(3), ionic_dv_pd_set_rqcmb(3), ionic_dv_pd_set_sqcmb(3), ionicdv(7)
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HTML rendering created 2026-09-09 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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