github-mirror/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-09-22 12:44:03 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity Graph

RDMA/uverbs: Add SRQ buffer UMEM attribute

Browse Source 
Apply the per-attribute UMEM model to the SRQ create method. Add an
optional UMEM attribute that backs the SRQ WQE buffer, so userspace can
supply it as either a VA or a dma-buf through a single descriptor,
consistent with the CQ and QP create methods.

mlx5 is the only driver that pins an SRQ WQE buffer via umem; it maps a
single ucmd->buf_addr region through this attribute. No other driver
implements a user SRQ buffer, so none of them use the attribute.

Signed-off-by: Jiri Pirko <jiri@nvidia.com>
Link: https://patch.msgid.link/20260701124015.64350-2-jiri@resnulli.us
Signed-off-by: Leon Romanovsky <leon@kernel.org>
This commit is contained in:
Jiri Pirko 2026-07-01 14:40:13 +02:00 committed by Leon Romanovsky
parent 1773ca1a89
commit fe34dc1fa0
2 changed files with 3 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/infiniband/core/uverbs_std_types_srq.c
View File

@ -192,6 +192,8 @@ DECLARE_UVERBS_NAMED_METHOD(
UVERBS_ATTR_PTR_OUT(UVERBS_ATTR_CREATE_SRQ_RESP_SRQ_NUM,
UVERBS_ATTR_TYPE(u32),
UA_OPTIONAL),
UVERBS_ATTR_UMEM(UVERBS_ATTR_CREATE_SRQ_BUF_UMEM,
UA_OPTIONAL),
UVERBS_ATTR_UHW());
static int UVERBS_HANDLER(UVERBS_METHOD_SRQ_DESTROY)(

1
include/uapi/rdma/ib_user_ioctl_cmds.h
View File

@ -204,6 +204,7 @@ enum uverbs_attrs_create_srq_cmd_attr_ids {
UVERBS_ATTR_CREATE_SRQ_RESP_MAX_WR,
UVERBS_ATTR_CREATE_SRQ_RESP_MAX_SGE,
UVERBS_ATTR_CREATE_SRQ_RESP_SRQ_NUM,
UVERBS_ATTR_CREATE_SRQ_BUF_UMEM,
};
enum uverbs_attrs_destroy_srq_cmd_attr_ids {