[PATCH 5.8 383/633] RDMA/hns: Add check for the validity of sl configuration
From: Greg Kroah-Hartman
Date: Tue Oct 27 2020 - 13:07:13 EST
From: Jiaran Zhang <zhangjiaran@xxxxxxxxxx>
[ Upstream commit 172505cfa3a8ee98acaa569fd3be97697b333958 ]
According to the RoCE v1 specification, the sl (service level) 0-7 are
mapped directly to priorities 0-7 respectively, sl 8-15 are reserved. The
driver should verify whether the the value of sl is larger than 7, if so,
an exception should be returned.
Fixes: 926a01dc000d ("RDMA/hns: Add QP operations support for hip08 SoC")
Link: https://lore.kernel.org/r/1600509802-44382-5-git-send-email-liweihang@xxxxxxxxxx
Signed-off-by: Jiaran Zhang <zhangjiaran@xxxxxxxxxx>
Signed-off-by: Weihang Li <liweihang@xxxxxxxxxx>
Signed-off-by: Jason Gunthorpe <jgg@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
drivers/infiniband/hw/hns/hns_roce_hw_v2.c | 12 ++++++++++--
drivers/infiniband/hw/hns/hns_roce_hw_v2.h | 2 ++
2 files changed, 12 insertions(+), 2 deletions(-)
diff --git a/drivers/infiniband/hw/hns/hns_roce_hw_v2.c b/drivers/infiniband/hw/hns/hns_roce_hw_v2.c
index 38a48ab3e1d02..0f995aa23b9a9 100644
--- a/drivers/infiniband/hw/hns/hns_roce_hw_v2.c
+++ b/drivers/infiniband/hw/hns/hns_roce_hw_v2.c
@@ -4287,11 +4287,19 @@ static int hns_roce_v2_set_path(struct ib_qp *ibqp,
V2_QPC_BYTE_28_FL_S, 0);
memcpy(context->dgid, grh->dgid.raw, sizeof(grh->dgid.raw));
memset(qpc_mask->dgid, 0, sizeof(grh->dgid.raw));
+
+ hr_qp->sl = rdma_ah_get_sl(&attr->ah_attr);
+ if (unlikely(hr_qp->sl > MAX_SERVICE_LEVEL)) {
+ ibdev_err(ibdev,
+ "failed to fill QPC, sl (%d) shouldn't be larger than %d.\n",
+ hr_qp->sl, MAX_SERVICE_LEVEL);
+ return -EINVAL;
+ }
+
roce_set_field(context->byte_28_at_fl, V2_QPC_BYTE_28_SL_M,
- V2_QPC_BYTE_28_SL_S, rdma_ah_get_sl(&attr->ah_attr));
+ V2_QPC_BYTE_28_SL_S, hr_qp->sl);
roce_set_field(qpc_mask->byte_28_at_fl, V2_QPC_BYTE_28_SL_M,
V2_QPC_BYTE_28_SL_S, 0);
- hr_qp->sl = rdma_ah_get_sl(&attr->ah_attr);
return 0;
}
diff --git a/drivers/infiniband/hw/hns/hns_roce_hw_v2.h b/drivers/infiniband/hw/hns/hns_roce_hw_v2.h
index 4f840997c6c73..c6a280bdbfaaf 100644
--- a/drivers/infiniband/hw/hns/hns_roce_hw_v2.h
+++ b/drivers/infiniband/hw/hns/hns_roce_hw_v2.h
@@ -1957,6 +1957,8 @@ struct hns_roce_eq_context {
#define HNS_ROCE_V2_AEQE_EVENT_QUEUE_NUM_S 0
#define HNS_ROCE_V2_AEQE_EVENT_QUEUE_NUM_M GENMASK(23, 0)
+#define MAX_SERVICE_LEVEL 0x7
+
struct hns_roce_wqe_atomic_seg {
__le64 fetchadd_swap_data;
__le64 cmp_data;
--
2.25.1