[for-next PATCH v5 07/11] RDMA/rxe: Implement RC RDMA FLUSH service in requester side

Li Zhijian
2022-09-27T05:54:16Z

Implement FLUSH request operation in the requester.

Signed-off-by: Li Zhijian <lizhijian@fujitsu.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@intel.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 f63771207970..5996b0e3177a 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