RDMA/hns: Add CQ flag instead of independent enable flag

It's easier to understand and maintain enable flags of cq using a single
field in type of u32 than defining a field for every flags in the
structure hns_roce_cq, and we can add new flags for features more
conveniently in the future.

Link: https://lore.kernel.org/r/1589982799-28728-3-git-send-email-liweihang@huawei.comSigned-off-by: Lang Cheng <chenglang@huawei.com>
Signed-off-by: Weihang Li <liweihang@huawei.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>

drivers/infiniband/hw/hns/hns_roce_cq.c

@@ -186,8 +186,8 @@ static int alloc_cq_db(struct hns_roce_dev *hr_dev, struct hns_roce_cq *hr_cq,
 						   &hr_cq->db);
 			if (err)
 				return err;
-			hr_cq->db_en = 1;
-			resp->cap_flags |= HNS_ROCE_SUPPORT_CQ_RECORD_DB;
+			hr_cq->flags |= HNS_ROCE_CQ_FLAG_RECORD_DB;
+			resp->cap_flags |= HNS_ROCE_CQ_FLAG_RECORD_DB;
 		}
 	} else {
 		if (has_db) {
@@ -196,7 +196,7 @@ static int alloc_cq_db(struct hns_roce_dev *hr_dev, struct hns_roce_cq *hr_cq,
 				return err;
 			hr_cq->set_ci_db = hr_cq->db.db_record;
 			*hr_cq->set_ci_db = 0;
-			hr_cq->db_en = 1;
+			hr_cq->flags |= HNS_ROCE_CQ_FLAG_RECORD_DB;
 		}
 		hr_cq->cq_db_l = hr_dev->reg_base + hr_dev->odb_offset +
 				 DB_REG_OFFSET * hr_dev->priv_uar.index;
@@ -210,10 +210,10 @@ static void free_cq_db(struct hns_roce_dev *hr_dev, struct hns_roce_cq *hr_cq,
 {
 	struct hns_roce_ucontext *uctx;
 
-	if (!hr_cq->db_en)
+	if (!(hr_cq->flags & HNS_ROCE_CQ_FLAG_RECORD_DB))
 		return;
 
-	hr_cq->db_en = 0;
+	hr_cq->flags &= ~HNS_ROCE_CQ_FLAG_RECORD_DB;
 	if (udata) {
 		uctx = rdma_udata_to_drv_context(udata,
 						 struct hns_roce_ucontext,

drivers/infiniband/hw/hns/hns_roce_device.h

@@ -137,8 +137,8 @@ enum {
 	HNS_ROCE_QP_CAP_SQ_RECORD_DB = BIT(1),
 };
 
-enum {
-	HNS_ROCE_SUPPORT_CQ_RECORD_DB = 1 << 0,
+enum hns_roce_cq_flags {
+	HNS_ROCE_CQ_FLAG_RECORD_DB = BIT(0),
 };
 
 enum hns_roce_qp_state {
@@ -458,7 +458,7 @@ struct hns_roce_cq {
 	struct ib_cq			ib_cq;
 	struct hns_roce_mtr		mtr;
 	struct hns_roce_db		db;
-	u8				db_en;
+	u32				flags;
 	spinlock_t			lock;
 	u32				cq_depth;
 	u32				cons_index;

drivers/infiniband/hw/hns/hns_roce_hw_v2.c

@@ -2898,9 +2898,9 @@ static void hns_roce_v2_write_cqc(struct hns_roce_dev *hr_dev,
 	roce_set_field(cq_context->byte_40_cqe_ba, V2_CQC_BYTE_40_CQE_BA_M,
 		       V2_CQC_BYTE_40_CQE_BA_S, (dma_handle >> (32 + 3)));
 
-	if (hr_cq->db_en)
 	roce_set_bit(cq_context->byte_44_db_record,
-			     V2_CQC_BYTE_44_DB_RECORD_EN_S, 1);
+		     V2_CQC_BYTE_44_DB_RECORD_EN_S,
+		     (hr_cq->flags & HNS_ROCE_CQ_FLAG_RECORD_DB) ? 1 : 0);
 
 	roce_set_field(cq_context->byte_44_db_record,
 		       V2_CQC_BYTE_44_DB_RECORD_ADDR_M,