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RDMA/rxe: Implement flush completion

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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.

Link: https://lore.kernel.org/r/20221206130201.30986-9-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>
This commit is contained in:
Li Zhijian 2022-12-06 21:01:59 +08:00 committed by Jason Gunthorpe
parent ea1bb00ee9
commit 70aad902ce
1 changed files with 3 additions and 1 deletions
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4
drivers/infiniband/sw/rxe/rxe_comp.c
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@ -105,6 +105,7 @@ static enum ib_wc_opcode wr_to_wc_opcode(enum ib_wr_opcode opcode)
case IB_WR_REG_MR: return IB_WC_REG_MR;
case IB_WR_BIND_MW: return IB_WC_BIND_MW;
case IB_WR_ATOMIC_WRITE: return IB_WC_ATOMIC_WRITE;
case IB_WR_FLUSH: return IB_WC_FLUSH;
default:
return 0xff;
@ -278,7 +279,8 @@ 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;
}