linux-kernel - [for-next PATCH v6 06/10] RDMA/rxe: Implement RC RDMA FLUSH service in requester side

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Message-Id: <20221116081951.32750-7-lizhijian@fujitsu.com>
Date:   Wed, 16 Nov 2022 16:19:47 +0800
From:   Li Zhijian <lizhijian@...itsu.com>
To:     zyjzyj2000@...il.com, jgg@...pe.ca, leon@...nel.org,
        Bob Pearson <rpearsonhpe@...il.com>, linux-rdma@...r.kernel.org
Cc:     Mark Bloch <mbloch@...dia.com>, Tom Talpey <tom@...pey.com>,
        tomasz.gromadzki@...el.com,
        Dan Williams <dan.j.williams@...el.com>,
        Xiao Yang <yangx.jy@...itsu.com>, y-goto@...itsu.com,
        linux-kernel@...r.kernel.org, Li Zhijian <lizhijian@...itsu.com>
Subject: [for-next PATCH v6 06/10] RDMA/rxe: Implement RC RDMA FLUSH service in requester side

Implement FLUSH request operation in the requester.

Reviewed-by: Zhu Yanjun <zyjzyj2000@...il.com>
Signed-off-by: Li Zhijian <lizhijian@...itsu.com>
---
V4: Remove flush union for legecy API, add WR_FLUSH_MASK
V3: Fix sparse: incorrect type in assignment; Reported-by: kernel test robot <lkp@...el.com>
V2: extend flush to include length field.
---
 drivers/infiniband/sw/rxe/rxe_req.c | 15 ++++++++++++++-
 1 file changed, 14 insertions(+), 1 deletion(-)

diff --git a/drivers/infiniband/sw/rxe/rxe_req.c b/drivers/infiniband/sw/rxe/rxe_req.c
index 41f1d84f0acb..b4e098298f25 100644
--- a/drivers/infiniband/sw/rxe/rxe_req.c
+++ b/drivers/infiniband/sw/rxe/rxe_req.c
@@ -241,6 +241,9 @@ static int next_opcode_rc(struct rxe_qp *qp, u32 opcode, int fits)
 				IB_OPCODE_RC_SEND_ONLY_WITH_IMMEDIATE :
 				IB_OPCODE_RC_SEND_FIRST;
 
+	case IB_WR_FLUSH:
+		return IB_OPCODE_RC_FLUSH;
+
 	case IB_WR_RDMA_READ:
 		return IB_OPCODE_RC_RDMA_READ_REQUEST;
 
@@ -421,11 +424,18 @@ static struct sk_buff *init_req_packet(struct rxe_qp *qp,
 
 	/* init optional headers */
 	if (pkt->mask & RXE_RETH_MASK) {
-		reth_set_rkey(pkt, ibwr->wr.rdma.rkey);
+		if (pkt->mask & RXE_FETH_MASK)
+			reth_set_rkey(pkt, ibwr->wr.flush.rkey);
+		else
+			reth_set_rkey(pkt, ibwr->wr.rdma.rkey);
 		reth_set_va(pkt, wqe->iova);
 		reth_set_len(pkt, wqe->dma.resid);
 	}
 
+	/* Fill Flush Extension Transport Header */
+	if (pkt->mask & RXE_FETH_MASK)
+		feth_init(pkt, ibwr->wr.flush.type, ibwr->wr.flush.level);
+
 	if (pkt->mask & RXE_IMMDT_MASK)
 		immdt_set_imm(pkt, ibwr->ex.imm_data);
 
@@ -484,6 +494,9 @@ static int finish_packet(struct rxe_qp *qp, struct rxe_av *av,
 
 			memset(pad, 0, bth_pad(pkt));
 		}
+	} else if (pkt->mask & RXE_FLUSH_MASK) {
+		/* oA19-2: shall have no payload. */
+		wqe->dma.resid = 0;
 	}
 
 	return 0;
-- 
2.31.1