[PATCH V2 for-next 3/6] RDMA/hns: Set access flags of hip08 RoCE

Lijun Ou
2017-12-26T11:25:11Z

This patch refactors the code of setting access flags
for RDMA operation as well as adds the scene when
attr->max_dest_rd_atomic is zero.

Signed-off-by: Lijun Ou <oulijun-hv44wF8Li93QT0dZR+AlfA@public.gmane.org>
---
drivers/infiniband/hw/hns/hns_roce_device.h | 1 +
drivers/infiniband/hw/hns/hns_roce_hw_v2.c | 48 +++++++++++++++++++++--------
2 files changed, 37 insertions(+), 12 deletions(-)

diff --git a/drivers/infiniband/hw/hns/hns_roce_device.h b/drivers/infiniband/hw/hns/hns_roce_device.h
index 8d123d3..4afa070 100644
--- a/drivers/infiniband/hw/hns/hns_roce_device.h
+++ b/drivers/infiniband/hw/hns/hns_roce_device.h
@@ -483,6 +483,7 @@ struct hns_roce_qp {
u8 resp_depth;
u8 state;
u32 access_flags;
+ u32 atomic_rd_en;
u32 pkey_index;
void (*event)(struct hns_roce_qp *,
enum hns_roce_event);
diff --git a/drivers/infiniband/hw/hns/hns_roce_hw_v2.c b/drivers/infiniband/hw/hns/hns_roce_hw_v2.c
index 5746d8b..dfa9dcc 100644
--- a/drivers/infiniband/hw/hns/hns_roce_hw_v2.c
+++ b/drivers/infiniband/hw/hns/hns_roce_hw_v2.c
@@ -1931,6 +1931,36 @@ static int hns_roce_v2_qp_modify(struct hns_roce_dev *hr_dev,
return ret;
}

+static void set_access_flags(struct hns_roce_qp *hr_qp,
+ struct hns_roce_v2_qp_context *context,
+ struct hns_roce_v2_qp_context *qpc_mask,
+ const struct ib_qp_attr *attr, int attr_mask)
+{
+ u8 dest_rd_atomic;
+ u32 access_flags;
+
+ dest_rd_atomic = !!(attr_mask & IB_QP_MAX_DEST_RD_ATOMIC) ?
+ attr->max_dest_rd_atomic : hr_qp->resp_depth;
+
+ access_flags = !!(attr_mask & IB_QP_ACCESS_FLAGS) ?
+ attr->qp_access_flags : hr_qp->atomic_rd_en;
+
+ if (!dest_rd_atomic)
+ access_flags &= IB_ACCESS_REMOTE_WRITE;
+
+ roce_set_bit(context->byte_76_srqn_op_en, V2_QPC_BYTE_76_RRE_S,
+ !!(access_flags & IB_ACCESS_REMOTE_READ));
+ roce_set_bit(qpc_mask->byte_76_srqn_op_en, V2_QPC_BYTE_76_RRE_S, 0);
+
+ roce_set_bit(context->byte_76_srqn_op_en, V2_QPC_BYTE_76_RWE_S,
+ !!(access_flags & IB_ACCESS_REMOTE_WRITE));
+ roce_set_bit(qpc_mask->byte_76_srqn_op_en, V2_QPC_BYTE_76_RWE_S, 0);
+
+ roce_set_bit(context->byte_76_srqn_op_en, V2_QPC_BYTE_76_ATE_S,
+ !!(access_flags & IB_ACCESS_REMOTE_ATOMIC));
+ roce_set_bit(qpc_mask->byte_76_srqn_op_en, V2_QPC_BYTE_76_ATE_S, 0);
+}
+
static void modify_qp_reset_to_init(struct ib_qp *ibqp,
const struct ib_qp_attr *attr,
struct hns_roce_v2_qp_context *context,
@@ -2016,18 +2046,6 @@ static void modify_qp_reset_to_init(struct ib_qp *ibqp,
roce_set_bit(qpc_mask->byte_28_at_fl, V2_QPC_BYTE_28_CNP_TX_FLAG_S, 0);
roce_set_bit(qpc_mask->byte_28_at_fl, V2_QPC_BYTE_28_CE_FLAG_S, 0);

- roce_set_bit(context->byte_76_srqn_op_en, V2_QPC_BYTE_76_RRE_S,
- !!(attr->qp_access_flags & IB_ACCESS_REMOTE_READ));
- roce_set_bit(qpc_mask->byte_76_srqn_op_en, V2_QPC_BYTE_76_RRE_S, 0);
-
- roce_set_bit(context->byte_76_srqn_op_en, V2_QPC_BYTE_76_RWE_S,
- !!(attr->qp_access_flags & IB_ACCESS_REMOTE_WRITE));
- roce_set_bit(qpc_mask->byte_76_srqn_op_en, V2_QPC_BYTE_76_RWE_S, 0);
-
- roce_set_bit(context->byte_76_srqn_op_en, V2_QPC_BYTE_76_ATE_S,
- !!(attr->qp_access_flags & IB_ACCESS_REMOTE_ATOMIC));
- roce_set_bit(qpc_mask->byte_76_srqn_op_en, V2_QPC_BYTE_76_ATE_S, 0);
-
roce_set_bit(context->byte_76_srqn_op_en, V2_QPC_BYTE_76_RQIE_S, 1);
roce_set_bit(qpc_mask->byte_76_srqn_op_en, V2_QPC_BYTE_76_RQIE_S, 0);

@@ -2907,6 +2925,9 @@ static int hns_roce_v2_modify_qp(struct ib_qp *ibqp,
goto out;
}

+ if (attr_mask & (IB_QP_ACCESS_FLAGS | IB_QP_MAX_DEST_RD_ATOMIC))
+ set_access_flags(hr_qp, context, qpc_mask, attr, attr_mask);
+
/* Every status migrate must change state */
roce_set_field(context->byte_60_qpst_mapid, V2_QPC_BYTE_60_QP_ST_M,
V2_QPC_BYTE_60_QP_ST_S, new_state);
@@ -2923,6 +2944,9 @@ static int hns_roce_v2_modify_qp(struct ib_qp *ibqp,

hr_qp->state = new_state;

+ if (attr_mask & IB_QP_ACCESS_FLAGS)
+ hr_qp->atomic_rd_en = attr->qp_access_flags;
+
if (attr_mask & IB_QP_MAX_DEST_RD_ATOMIC)
hr_qp->resp_depth = attr->max_dest_rd_atomic;
if (attr_mask & IB_QP_PORT) {