linux-kernel - [for-next PATCH 03/10] RDMA/rxe: Extend rxe user ABI to support flush

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Date:   Tue,  6 Dec 2022 21:01:54 +0800
From:   Li Zhijian <lizhijian@...itsu.com>
To:     Bob Pearson <rpearsonhpe@...il.com>,
        Leon Romanovsky <leon@...nel.org>,
        Jason Gunthorpe <jgg@...pe.ca>, linux-rdma@...r.kernel.org
Cc:     Zhu Yanjun <zyjzyj2000@...il.com>, yangx.jy@...itsu.com,
        y-goto@...itsu.com, mbloch@...dia.com, tom@...pey.com,
        tomasz.gromadzki@...el.com, dan.j.williams@...el.com,
        linux-kernel@...r.kernel.org, Li Zhijian <lizhijian@...itsu.com>
Subject: [for-next PATCH 03/10] 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.

Reviewed-by: Zhu Yanjun <zyjzyj2000@...il.com>
Signed-off-by: Li Zhijian <lizhijian@...itsu.com>
---
V5: new patch split scheme, suggested by Bob
---
 include/uapi/rdma/rdma_user_rxe.h | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/include/uapi/rdma/rdma_user_rxe.h b/include/uapi/rdma/rdma_user_rxe.h
index d20d1ecf046f..bb092fccb813 100644
--- a/include/uapi/rdma/rdma_user_rxe.h
+++ b/include/uapi/rdma/rdma_user_rxe.h
@@ -82,6 +82,13 @@ struct rxe_send_wr {
 		__u32		invalidate_rkey;
 	} ex;
 	union {
+		struct {
+			__aligned_u64 remote_addr;
+			__u32	length;
+			__u32	rkey;
+			__u8	type;
+			__u8	level;
+		} flush;
 		struct {
 			__aligned_u64 remote_addr;
 			__u32	rkey;
-- 
2.31.1