RDMA/hns: Remove enable rq inline in kernel and add compatibility handling

driver inclusion
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I5USIG

----------------------------------------------------------

The rq inline makes some changes as follows, Firstly, it is only
used in user space. Secondly, it should notify hardware in QP RTR
status. Thirdly, Add compatibility processing between different
user space and kernel space. Change the HNS_ROCE_CAP_FLAG_RQ_INLINE
to a new bit to prevent old kernel spaces / spaced from enabling
rq inline.
Signed-off-by: NLuoyouming <luoyouming@huawei.com>
Reviewed-by: NYangyang Li <liyangyang20@huawei.com>
Reviewed-by: NHaoyue Xu <xuhaoyue1@hisilicon.com>
Reviewed-by: NYueHaibing <yuehaibing@huawei.com>
Signed-off-by: NZheng Zengkai <zhengzengkai@huawei.com>

drivers/infiniband/hw/hns/hns_roce_device.h

@@ -132,7 +132,8 @@ enum hns_roce_event {
 enum {
 	HNS_ROCE_CAP_FLAG_REREG_MR		= BIT(0),
 	HNS_ROCE_CAP_FLAG_ROCE_V1_V2		= BIT(1),
-	HNS_ROCE_CAP_FLAG_RQ_INLINE		= BIT(2),
+	/* discard this bit, reserved for compatibility */
+	HNS_ROCE_CAP_FLAG_DISCARD		= BIT(2),
 	HNS_ROCE_CAP_FLAG_CQ_RECORD_DB		= BIT(3),
 	HNS_ROCE_CAP_FLAG_QP_RECORD_DB		= BIT(4),
 	HNS_ROCE_CAP_FLAG_SRQ			= BIT(5),
@@ -144,6 +145,7 @@ enum {
 	HNS_ROCE_CAP_FLAG_DIRECT_WQE		= BIT(12),
 	HNS_ROCE_CAP_FLAG_SDI_MODE		= BIT(14),
 	HNS_ROCE_CAP_FLAG_STASH			= BIT(17),
+	HNS_ROCE_CAP_FLAG_RQ_INLINE		= BIT(20),
 };
 
 #define HNS_ROCE_DB_TYPE_COUNT			2
@@ -890,7 +892,7 @@ struct hns_roce_hw {
 			 u32 step_idx);
 	int (*modify_qp)(struct ib_qp *ibqp, const struct ib_qp_attr *attr,
 			 int attr_mask, enum ib_qp_state cur_state,
-			 enum ib_qp_state new_state);
+			 enum ib_qp_state new_state, struct ib_udata *udata);
 	int (*qp_flow_control_init)(struct hns_roce_dev *hr_dev,
 			 struct hns_roce_qp *hr_qp);
 	void (*dereg_mr)(struct hns_roce_dev *hr_dev);

drivers/infiniband/hw/hns/hns_roce_hw_v2.c

@@ -2801,7 +2801,7 @@ static int free_mr_modify_rsv_qp(struct hns_roce_dev *hr_dev,
 	attr->port_num = 1;
 	attr->qp_access_flags = IB_ACCESS_REMOTE_WRITE;
 	ret = hr_dev->hw->modify_qp(&hr_qp->ibqp, attr, mask, IB_QPS_INIT,
-				    IB_QPS_INIT);
+				    IB_QPS_INIT, NULL);
 	if (ret) {
 		ibdev_err(ibdev, "failed to modify qp to init, ret = %d.\n",
 			  ret);
@@ -2823,7 +2823,7 @@ static int free_mr_modify_rsv_qp(struct hns_roce_dev *hr_dev,
 	rdma_ah_set_sl(&attr->ah_attr, (u8)sl_num);
 
 	ret = hr_dev->hw->modify_qp(&hr_qp->ibqp, attr, mask, IB_QPS_INIT,
-				    IB_QPS_RTR);
+				    IB_QPS_RTR, NULL);
 	hr_dev->loop_idc = loopback;
 	if (ret) {
 		ibdev_err(ibdev, "failed to modify qp to rtr, ret = %d.\n",
@@ -2838,7 +2838,7 @@ static int free_mr_modify_rsv_qp(struct hns_roce_dev *hr_dev,
 	attr->retry_cnt = HNS_ROCE_FREE_MR_USED_QP_RETRY_CNT;
 	attr->timeout = HNS_ROCE_FREE_MR_USED_QP_TIMEOUT;
 	ret = hr_dev->hw->modify_qp(&hr_qp->ibqp, attr, mask, IB_QPS_RTR,
-				    IB_QPS_RTS);
+				    IB_QPS_RTS, NULL);
 	if (ret)
 		ibdev_err(ibdev, "failed to modify qp to rts, ret = %d.\n",
 			  ret);
@@ -4404,10 +4404,6 @@ static void modify_qp_reset_to_init(struct ib_qp *ibqp,
 	hr_reg_write(context, QPC_RQ_DB_RECORD_ADDR_H,
 		     upper_32_bits(hr_qp->rdb.dma));
 
-	if (ibqp->qp_type != IB_QPT_UD && ibqp->qp_type != IB_QPT_GSI)
-		hr_reg_write_bool(context, QPC_RQIE,
-			     hr_dev->caps.flags & HNS_ROCE_CAP_FLAG_RQ_INLINE);
-
 	hr_reg_write(context, QPC_RX_CQN, get_cqn(ibqp->recv_cq));
 
 	if (ibqp->srq) {
@@ -4598,8 +4594,11 @@ static inline enum ib_mtu get_mtu(struct ib_qp *ibqp,
 static int modify_qp_init_to_rtr(struct ib_qp *ibqp,
 				 const struct ib_qp_attr *attr, int attr_mask,
 				 struct hns_roce_v2_qp_context *context,
-				 struct hns_roce_v2_qp_context *qpc_mask)
+				 struct hns_roce_v2_qp_context *qpc_mask,
+				 struct ib_udata *udata)
 {
+	struct hns_roce_ucontext *uctx = rdma_udata_to_drv_context(udata,
+					  struct hns_roce_ucontext, ibucontext);
 	struct hns_roce_dev *hr_dev = to_hr_dev(ibqp->device);
 	struct hns_roce_qp *hr_qp = to_hr_qp(ibqp);
 	struct ib_device *ibdev = &hr_dev->ib_dev;
@@ -4719,6 +4718,14 @@ static int modify_qp_init_to_rtr(struct ib_qp *ibqp,
 	hr_reg_write(context, QPC_LP_SGEN_INI, 3);
 	hr_reg_clear(qpc_mask, QPC_LP_SGEN_INI);
 
+	if (udata && (ibqp->qp_type == IB_QPT_RC) &&
+	    (uctx->config & HNS_ROCE_RQ_INLINE_FLAGS)) {
+		hr_reg_write_bool(context, QPC_RQIE,
+				  hr_dev->caps.flags &
+				  HNS_ROCE_CAP_FLAG_RQ_INLINE);
+		hr_reg_clear(qpc_mask, QPC_RQIE);
+	}
+
 	return 0;
 }
 
@@ -5067,7 +5074,8 @@ static int hns_roce_v2_set_abs_fields(struct ib_qp *ibqp,
 				      enum ib_qp_state cur_state,
 				      enum ib_qp_state new_state,
 				      struct hns_roce_v2_qp_context *context,
-				      struct hns_roce_v2_qp_context *qpc_mask)
+				      struct hns_roce_v2_qp_context *qpc_mask,
+				      struct ib_udata *udata)
 {
 	struct hns_roce_dev *hr_dev = to_hr_dev(ibqp->device);
 	int ret = 0;
@@ -5086,7 +5094,7 @@ static int hns_roce_v2_set_abs_fields(struct ib_qp *ibqp,
 				       qpc_mask);
 	} else if (cur_state == IB_QPS_INIT && new_state == IB_QPS_RTR) {
 		ret = modify_qp_init_to_rtr(ibqp, attr, attr_mask, context,
-					    qpc_mask);
+					    qpc_mask, udata);
 	} else if (cur_state == IB_QPS_RTR && new_state == IB_QPS_RTS) {
 		ret = modify_qp_rtr_to_rts(ibqp, attr, attr_mask, context,
 					   qpc_mask);
@@ -5266,7 +5274,7 @@ static void v2_set_flushed_fields(struct ib_qp *ibqp,
 static int hns_roce_v2_modify_qp(struct ib_qp *ibqp,
 				 const struct ib_qp_attr *attr,
 				 int attr_mask, enum ib_qp_state cur_state,
-				 enum ib_qp_state new_state)
+				 enum ib_qp_state new_state, struct ib_udata *udata)
 {
 	struct hns_roce_dev *hr_dev = to_hr_dev(ibqp->device);
 	struct hns_roce_qp *hr_qp = to_hr_qp(ibqp);
@@ -5286,7 +5294,7 @@ static int hns_roce_v2_modify_qp(struct ib_qp *ibqp,
 	memset(qpc_mask, 0xff, hr_dev->caps.qpc_sz);
 
 	ret = hns_roce_v2_set_abs_fields(ibqp, attr, attr_mask, cur_state,
-					 new_state, context, qpc_mask);
+					 new_state, context, qpc_mask, udata);
 	if (ret)
 		goto out;
 
@@ -5487,7 +5495,7 @@ int hns_roce_v2_destroy_qp_common(struct hns_roce_dev *hr_dev,
 	if (modify_qp_is_ok(hr_qp)) {
 		/* Modify qp to reset before destroying qp */
 		ret = hns_roce_v2_modify_qp(&hr_qp->ibqp, NULL, 0,
-					    hr_qp->state, IB_QPS_RESET);
+					    hr_qp->state, IB_QPS_RESET, udata);
 		if (ret)
 			ibdev_err(ibdev,
 				  "failed to modify QP to RST, ret = %d.\n",

drivers/infiniband/hw/hns/hns_roce_main.c

@@ -379,6 +379,11 @@ static int hns_roce_alloc_ucontext(struct ib_ucontext *uctx,
 		resp.max_inline_data = hr_dev->caps.max_sq_inline;
 	}
 
+	if (hr_dev->caps.flags & HNS_ROCE_CAP_FLAG_RQ_INLINE) {
+		context->config |= ucmd.config & HNS_ROCE_RQ_INLINE_FLAGS;
+		resp.config |= HNS_ROCE_RSP_RQ_INLINE_FLAGS;
+	}
+
 	ret = hns_roce_uar_alloc(hr_dev, &context->uar);
 	if (ret)
 		goto error_fail_uar_alloc;

drivers/infiniband/hw/hns/hns_roce_qp.c

@@ -1441,7 +1441,7 @@ int hns_roce_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr,
 		goto out;
 
 	ret = hr_dev->hw->modify_qp(ibqp, attr, attr_mask, cur_state,
-				    new_state);
+				    new_state, udata);
 
 out:
 	mutex_unlock(&hr_qp->mutex);

include/uapi/rdma/hns-abi.h

@@ -87,10 +87,12 @@ struct hns_roce_ib_create_qp_resp {
 
 enum {
 	HNS_ROCE_EXSGE_FLAGS = 1 << 0,
+	HNS_ROCE_RQ_INLINE_FLAGS = 1 << 1,
 };
 
 enum {
 	HNS_ROCE_RSP_EXSGE_FLAGS = 1 << 0,
+	HNS_ROCE_RSP_RQ_INLINE_FLAGS = 1 << 1,
 };
 
 struct hns_roce_ib_alloc_ucontext_resp {