RDMA/uverbs: Add a common way to create CQ with umem

Browse source

Add ioctl command attributes and a common handling for the option to
create CQs with memory buffers passed from userspace. When required
attributes are supplied, create umem and provide it for driver's use.
The extension enables creation of CQs on top of preallocated CPU
virtual or device memory buffers, by supplying VA or dmabuf fd, in a
common way.
Drivers can support this flow by initializing a new create_cq_umem fp
field in their ops struct, with a function that can handle the new
parameter.

Signed-off-by: Michael Margolin <mrgolin@amazon.com>
Link: https://patch.msgid.link/20250708202308.24783-2-mrgolin@amazon.com
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>

...

This commit is contained in:

Michael Margolin 2025-07-08 20:23:06 +00:00 • committed by Leon Romanovsky

parent e73242aa14

commit 1a40c362ae

4 changed files with 90 additions and 6 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

1

drivers/infiniband/core/device.c

View file

87

drivers/infiniband/core/uverbs_std_types_cq.c

View file

4

include/rdma/ib_verbs.h

View file

4

include/uapi/rdma/ib_user_ioctl_cmds.h

View file