RDMA/rxe: Extend rxe user ABI to support flush

This commit extends the rxe user ABI to support the flush
operation defined in IBA A19.4.1. These changes are
backward compatible with the existing rxe user ABI.

The user API request a flush by filling this structure.

Link: https://lore.kernel.org/r/20221206130201.30986-4-lizhijian@fujitsu.com
Reviewed-by: Zhu Yanjun <zyjzyj2000@gmail.com>
Signed-off-by: Li Zhijian <lizhijian@fujitsu.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>

diff --git a/include/uapi/rdma/rdma_user_rxe.h b/include/uapi/rdma/rdma_user_rxe.h
index d20d1ec..bb092fc 100644 (file)
--- a/include/uapi/rdma/rdma_user_rxe.h
+++ b/include/uapi/rdma/rdma_user_rxe.h
@@ -84,6 +84,13 @@ struct rxe_send_wr {
        union {
                struct {
                        __aligned_u64 remote_addr;
+                       __u32   length;
+                       __u32   rkey;
+                       __u8    type;
+                       __u8    level;
+               } flush;
+               struct {
+                       __aligned_u64 remote_addr;
                        __u32   rkey;
                        __u32   reserved;
                } rdma;