[for-next PATCH v6 08/10] RDMA/rxe: Implement flush completion

From: Li Zhijian <lizhijian@fujitsu.com>
To: zyjzyj2000@gmail.com, jgg@ziepe.ca, leon@kernel.org,
	Bob Pearson <rpearsonhpe@gmail.com>,
	linux-rdma@vger.kernel.org
Cc: Mark Bloch <mbloch@nvidia.com>, Tom Talpey <tom@talpey.com>,
	tomasz.gromadzki@intel.com,
	Dan Williams <dan.j.williams@intel.com>,
	Xiao Yang <yangx.jy@fujitsu.com>,
	y-goto@fujitsu.com, linux-kernel@vger.kernel.org,
	Li Zhijian <lizhijian@fujitsu.com>
Subject: [for-next PATCH v6 08/10] RDMA/rxe: Implement flush completion
Date: Wed, 16 Nov 2022 16:19:49 +0800	[thread overview]
Message-ID: <20221116081951.32750-9-lizhijian@fujitsu.com> (raw)
In-Reply-To: <20221116081951.32750-1-lizhijian@fujitsu.com>

Per IBA SPEC, FLUSH will ack in rdma read response with 0 length.

Use IB_WC_FLUSH (aka IB_UVERBS_WC_FLUSH) code to tell userspace a FLUSH
completion.

Reviewed-by: Zhu Yanjun <zyjzyj2000@gmail.com>
Signed-off-by: Li Zhijian <lizhijian@fujitsu.com>
---
 drivers/infiniband/sw/rxe/rxe_comp.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/infiniband/sw/rxe/rxe_comp.c b/drivers/infiniband/sw/rxe/rxe_comp.c
index 66f392810c86..12252ac6b5c2 100644
--- a/drivers/infiniband/sw/rxe/rxe_comp.c
+++ b/drivers/infiniband/sw/rxe/rxe_comp.c
@@ -104,6 +104,7 @@ static enum ib_wc_opcode wr_to_wc_opcode(enum ib_wr_opcode opcode)
 	case IB_WR_LOCAL_INV:			return IB_WC_LOCAL_INV;
 	case IB_WR_REG_MR:			return IB_WC_REG_MR;
 	case IB_WR_BIND_MW:			return IB_WC_BIND_MW;
+	case IB_WR_FLUSH:			return IB_WC_FLUSH;
 
 	default:
 		return 0xff;
@@ -274,7 +275,8 @@ static inline enum comp_state check_ack(struct rxe_qp *qp,
 		 */
 	case IB_OPCODE_RC_RDMA_READ_RESPONSE_MIDDLE:
 		if (wqe->wr.opcode != IB_WR_RDMA_READ &&
-		    wqe->wr.opcode != IB_WR_RDMA_READ_WITH_INV) {
+		    wqe->wr.opcode != IB_WR_RDMA_READ_WITH_INV &&
+		    wqe->wr.opcode != IB_WR_FLUSH) {
 			wqe->status = IB_WC_FATAL_ERR;
 			return COMPST_ERROR;
 		}
-- 
2.31.1

