RDMA/hns: Support cqe inline in user space

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

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

Enable the CQEIE field and configure the CQEIS field of QPC.
And add compatibility handling.
Signed-off-by: NLuoyouming <luoyouming@huawei.com>
Reviewed-by: NYangyang Li <liyangyang20@huawei.com>
Reviewed-by: NYueHaibing <yuehaibing@huawei.com>
Signed-off-by: NZheng Zengkai <zhengzengkai@huawei.com>

drivers/infiniband/hw/hns/hns_roce_device.h

@@ -145,6 +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_CQE_INLINE		= BIT(19),
 	HNS_ROCE_CAP_FLAG_RQ_INLINE		= BIT(20),
 };
 

drivers/infiniband/hw/hns/hns_roce_hw_v2.c

@@ -4726,6 +4726,18 @@ static int modify_qp_init_to_rtr(struct ib_qp *ibqp,
 		hr_reg_clear(qpc_mask, QPC_RQIE);
 	}
 
+	if (udata &&
+	    (ibqp->qp_type == IB_QPT_RC || ibqp->qp_type == IB_QPT_XRC_TGT) &&
+	    (uctx->config & HNS_ROCE_ALLOC_UCTX_CQE_INLINE_FLAGS)) {
+		hr_reg_write_bool(context, QPC_CQEIE,
+				  hr_dev->caps.flags &
+				  HNS_ROCE_CAP_FLAG_CQE_INLINE);
+		hr_reg_clear(qpc_mask, QPC_CQEIE);
+
+		hr_reg_write(context, QPC_CQEIS, 0);
+		hr_reg_clear(qpc_mask, QPC_CQEIS);
+	}
+
 	return 0;
 }
 

drivers/infiniband/hw/hns/hns_roce_hw_v2.h

@@ -529,7 +529,8 @@ struct hns_roce_v2_qp_context {
 #define QPC_RQ_RTY_TX_ERR QPC_FIELD_LOC(607, 607)
 #define QPC_RX_CQN QPC_FIELD_LOC(631, 608)
 #define QPC_XRC_QP_TYPE QPC_FIELD_LOC(632, 632)
-#define QPC_RSV3 QPC_FIELD_LOC(634, 633)
+#define QPC_CQEIE QPC_FIELD_LOC(633, 633)
+#define QPC_CQEIS QPC_FIELD_LOC(634, 634)
 #define QPC_MIN_RNR_TIME QPC_FIELD_LOC(639, 635)
 #define QPC_RQ_PRODUCER_IDX QPC_FIELD_LOC(655, 640)
 #define QPC_RQ_CONSUMER_IDX QPC_FIELD_LOC(671, 656)

drivers/infiniband/hw/hns/hns_roce_main.c

@@ -383,6 +383,10 @@ static int hns_roce_alloc_ucontext(struct ib_ucontext *uctx,
 		context->config |= ucmd.config & HNS_ROCE_ALLOC_UCTX_RQ_INLINE_FLAGS;
 		if (hr_dev->caps.flags & HNS_ROCE_CAP_FLAG_RQ_INLINE)
 			resp.config |= HNS_ROCE_ALLOC_UCTX_RQ_INLINE_FLAGS;
+
+		context->config |= ucmd.config & HNS_ROCE_ALLOC_UCTX_CQE_INLINE_FLAGS;
+		if (hr_dev->caps.flags & HNS_ROCE_CAP_FLAG_CQE_INLINE)
+			resp.config |= HNS_ROCE_ALLOC_UCTX_CQE_INLINE_FLAGS;
 	}
 
 	ret = hns_roce_uar_alloc(hr_dev, &context->uar);

include/uapi/rdma/hns-abi.h

@@ -88,6 +88,7 @@ struct hns_roce_ib_create_qp_resp {
 enum {
 	HNS_ROCE_UCONTEXT_EXSGE_CALC_MODE = 1 << 0,
 	HNS_ROCE_ALLOC_UCTX_RQ_INLINE_FLAGS = 1 << 1,
+	HNS_ROCE_ALLOC_UCTX_CQE_INLINE_FLAGS = 1 << 2,
 };
 
 struct hns_roce_ib_alloc_ucontext_resp {