From bdce1290493caa3f8119f24b5dacc3fb7ca27389 Mon Sep 17 00:00:00 2001
From: Konstantin Taranov <konstantin.taranov@inf.ethz.ch>
Date: Thu, 27 Jun 2019 16:06:43 +0200
Subject: [PATCH 1/1] RDMA/rxe: Fill in wc byte_len with
Git-commit: bdce1290493caa3f8119f24b5dacc3fb7ca27389
Patch-mainline: v5.10-rc1
References: bsc#1111666
IB_WC_RECV_RDMA_WITH_IMM
Calculate the correct byte_len on the receiving side when a work
completion is generated with IB_WC_RECV_RDMA_WITH_IMM opcode.
According to the IBA byte_len must indicate the number of written bytes,
whereas it was always equal to zero for the IB_WC_RECV_RDMA_WITH_IMM
opcode, even though data was transferred.
Fixes: 8700e3e7c485 ("Soft RoCE driver")
Signed-off-by: Konstantin Taranov <konstantin.taranov@inf.ethz.ch>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Acked-by: Nicolas Morey-Chaisemartin <nmoreychaisemartin@suse.com>
---
drivers/infiniband/sw/rxe/rxe_resp.c | 5 ++++-
drivers/infiniband/sw/rxe/rxe_verbs.h | 1 +
2 files changed, 5 insertions(+), 1 deletion(-)
diff --git a/drivers/infiniband/sw/rxe/rxe_resp.c b/drivers/infiniband/sw/rxe/rxe_resp.c
index aca9f60f9b21..1cbfbd98eb22 100644
--- a/drivers/infiniband/sw/rxe/rxe_resp.c
+++ b/drivers/infiniband/sw/rxe/rxe_resp.c
@@ -431,6 +431,7 @@ static enum resp_states check_rkey(struct rxe_qp *qp,
qp->resp.va = reth_va(pkt);
qp->resp.rkey = reth_rkey(pkt);
qp->resp.resid = reth_len(pkt);
+ qp->resp.length = reth_len(pkt);
}
access = (pkt->mask & RXE_READ_MASK) ? IB_ACCESS_REMOTE_READ
: IB_ACCESS_REMOTE_WRITE;
@@ -856,7 +857,9 @@ static enum resp_states do_complete(struct rxe_qp *qp,
pkt->mask & RXE_WRITE_MASK) ?
IB_WC_RECV_RDMA_WITH_IMM : IB_WC_RECV;
wc->vendor_err = 0;
- wc->byte_len = wqe->dma.length - wqe->dma.resid;
+ wc->byte_len = (pkt->mask & RXE_IMMDT_MASK &&
+ pkt->mask & RXE_WRITE_MASK) ?
+ qp->resp.length : wqe->dma.length - wqe->dma.resid;
/* fields after byte_len are different between kernel and user
* space
diff --git a/drivers/infiniband/sw/rxe/rxe_verbs.h b/drivers/infiniband/sw/rxe/rxe_verbs.h
index 6c997d39a418..5c4b2239129c 100644
--- a/drivers/infiniband/sw/rxe/rxe_verbs.h
+++ b/drivers/infiniband/sw/rxe/rxe_verbs.h
@@ -213,6 +213,7 @@ struct rxe_resp_info {
struct rxe_mem *mr;
u32 resid;
u32 rkey;
+ u32 length;
u64 atomic_orig;
/* SRQ only */
--
2.26.2