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| author | Mark Zhang <markzhang@nvidia.com> | 2025-06-30 13:52:35 +0300 |
|---|---|---|
| committer | Leon Romanovsky <leon@kernel.org> | 2025-08-13 13:16:11 +0300 |
| commit | a3c9d0fcd3715541bbf97da2ddde9d032e2fe6d5 (patch) | |
| tree | f877642188990a8fe21063028ffa8ab00d1f7b34 /include/uapi | |
| parent | 810f874eda8e492701ba3623aa298caad61bb47c (diff) | |
| download | linux-a3c9d0fcd3715541bbf97da2ddde9d032e2fe6d5.tar.xz | |
RDMA/ucma: Support write an event into a CM
Enable user-space to inject an event into a CM through it's event
channel. Two new events are added and supported: RDMA_CM_EVENT_USER and
RDMA_CM_EVENT_INTERNAL. With these 2 events a new event parameter "arg"
is supported, which is passed from sender to receiver transparently.
With this feature an application is able to write an event into a CM
channel with a new user-space rdmacm API. For example thread T1 could
write an event with the API:
rdma_write_cm_event(cm_id, RDMA_CM_EVENT_USER, status, arg);
and thread T2 could receive the event with rdma_get_cm_event().
Signed-off-by: Mark Zhang <markzhang@nvidia.com>
Reviewed-by: Vlad Dumitrescu <vdumitrescu@nvidia.com>
Link: https://patch.msgid.link/fdf49d0b17a45933c5d8c1d90605c9447d9a3c73.1751279794.git.leonro@nvidia.com
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Diffstat (limited to 'include/uapi')
| -rw-r--r-- | include/uapi/rdma/rdma_user_cm.h | 16 |
1 files changed, 15 insertions, 1 deletions
diff --git a/include/uapi/rdma/rdma_user_cm.h b/include/uapi/rdma/rdma_user_cm.h index 00501da0567e..5ded174687ee 100644 --- a/include/uapi/rdma/rdma_user_cm.h +++ b/include/uapi/rdma/rdma_user_cm.h @@ -68,7 +68,8 @@ enum { RDMA_USER_CM_CMD_BIND, RDMA_USER_CM_CMD_RESOLVE_ADDR, RDMA_USER_CM_CMD_JOIN_MCAST, - RDMA_USER_CM_CMD_RESOLVE_IB_SERVICE + RDMA_USER_CM_CMD_RESOLVE_IB_SERVICE, + RDMA_USER_CM_CMD_WRITE_CM_EVENT, }; /* See IBTA Annex A11, servies ID bytes 4 & 5 */ @@ -304,6 +305,7 @@ struct rdma_ucm_event_resp { union { struct rdma_ucm_conn_param conn; struct rdma_ucm_ud_param ud; + __u32 arg32[2]; } param; __u32 reserved; struct rdma_ucm_ece ece; @@ -362,4 +364,16 @@ struct rdma_ucm_resolve_ib_service { __u32 id; struct rdma_ucm_ib_service ibs; }; + +struct rdma_ucm_write_cm_event { + __u32 id; + __u32 reserved; + __u32 event; + __u32 status; + union { + struct rdma_ucm_conn_param conn; + struct rdma_ucm_ud_param ud; + __u64 arg; + } param; +}; #endif /* RDMA_USER_CM_H */ |