[PATCH for-next 2/2] RDMA/hns: Add NOP operation for sending WR

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



From: Yangyang Li <liyangyang20@xxxxxxxxxx>

The NOP operation is a no-op, mainly used in scenarios where SQWQE requires
page alignment or WQE size alignment. Each NOP WR consumes one SQWQE, but
the hardware does not operate and directly generates a CQE. The IB
specification does not specify this type of WR.

Signed-off-by: Yangyang Li <liyangyang20@xxxxxxxxxx>
Signed-off-by: Wenpeng Liang <liangwenpeng@xxxxxxxxxx>
---
 drivers/infiniband/hw/hns/hns_roce_hw_v2.c | 9 +++++++++
 drivers/infiniband/hw/hns/hns_roce_hw_v2.h | 9 +++++++++
 2 files changed, 18 insertions(+)

diff --git a/drivers/infiniband/hw/hns/hns_roce_hw_v2.c b/drivers/infiniband/hw/hns/hns_roce_hw_v2.c
index cf5455cda9c4..0494e3330be0 100644
--- a/drivers/infiniband/hw/hns/hns_roce_hw_v2.c
+++ b/drivers/infiniband/hw/hns/hns_roce_hw_v2.c
@@ -73,6 +73,9 @@ static inline void set_data_seg_v2(struct hns_roce_v2_wqe_data_seg *dseg,
 #define HR_IB_OPC_MAP(ib_key, hr_key) \
 		[IB_WR_ ## ib_key] = 1 + HNS_ROCE_V2_WQE_OP_ ## hr_key
 
+#define HR_PRIV_OPC_MAP(hr_key) \
+		[HNS_ROCE_WR_ ## hr_key] = 1 + HNS_ROCE_V2_WQE_OP_ ## hr_key
+
 static const u32 hns_roce_op_code[] = {
 	HR_IB_OPC_MAP(RDMA_WRITE, RDMA_WRITE),
 	HR_IB_OPC_MAP(RDMA_WRITE_WITH_IMM, RDMA_WRITE_WITH_IMM),
@@ -86,6 +89,7 @@ static const u32 hns_roce_op_code[] = {
 	HR_IB_OPC_MAP(MASKED_ATOMIC_CMP_AND_SWP, ATOM_MSK_CMP_AND_SWAP),
 	HR_IB_OPC_MAP(MASKED_ATOMIC_FETCH_AND_ADD, ATOM_MSK_FETCH_AND_ADD),
 	HR_IB_OPC_MAP(REG_MR, FAST_REG_PMR),
+	HR_PRIV_OPC_MAP(NOP),
 };
 
 static u32 to_hr_opcode(u32 ib_opcode)
@@ -540,6 +544,7 @@ static int set_rc_opcode(struct hns_roce_dev *hr_dev,
 		break;
 	case IB_WR_SEND:
 	case IB_WR_SEND_WITH_IMM:
+	case HNS_ROCE_WR_NOP:
 		break;
 	case IB_WR_ATOMIC_CMP_AND_SWP:
 	case IB_WR_ATOMIC_FETCH_AND_ADD:
@@ -3852,6 +3857,9 @@ static int get_cur_qp(struct hns_roce_cq *hr_cq, struct hns_roce_v2_cqe *cqe,
 #define HR_IB_WC_OP_MAP(hr_key, ib_key) \
 		[HNS_ROCE_V2_WQE_OP_ ## hr_key] = 1 + IB_WC_ ## ib_key
 
+#define HR_PRIV_WC_OP_MAP(hr_key) \
+		[HNS_ROCE_V2_WQE_OP_ ## hr_key] = 1 + HNS_ROCE_WC_ ## hr_key
+
 static const u32 wc_send_op_map[] = {
 	HR_IB_WC_OP_MAP(SEND, SEND),
 	HR_IB_WC_OP_MAP(SEND_WITH_INV, SEND),
@@ -3866,6 +3874,7 @@ static const u32 wc_send_op_map[] = {
 	HR_IB_WC_OP_MAP(ATOM_MSK_FETCH_AND_ADD, MASKED_FETCH_ADD),
 	HR_IB_WC_OP_MAP(FAST_REG_PMR, REG_MR),
 	HR_IB_WC_OP_MAP(BIND_MW, REG_MR),
+	HR_PRIV_WC_OP_MAP(NOP),
 };
 
 static int to_ib_wc_send_op(u32 hr_opcode)
diff --git a/drivers/infiniband/hw/hns/hns_roce_hw_v2.h b/drivers/infiniband/hw/hns/hns_roce_hw_v2.h
index 0d87b627601e..9e7f7148a9ad 100644
--- a/drivers/infiniband/hw/hns/hns_roce_hw_v2.h
+++ b/drivers/infiniband/hw/hns/hns_roce_hw_v2.h
@@ -170,6 +170,14 @@ enum {
 
 #define	GID_LEN_V2				16
 
+enum {
+	HNS_ROCE_WR_NOP = IB_WR_RESERVED4,
+};
+
+enum {
+	HNS_ROCE_WC_NOP = HNS_ROCE_WR_NOP,
+};
+
 enum {
 	HNS_ROCE_V2_WQE_OP_SEND				= 0x0,
 	HNS_ROCE_V2_WQE_OP_SEND_WITH_INV		= 0x1,
@@ -184,6 +192,7 @@ enum {
 	HNS_ROCE_V2_WQE_OP_FAST_REG_PMR			= 0xa,
 	HNS_ROCE_V2_WQE_OP_LOCAL_INV			= 0xb,
 	HNS_ROCE_V2_WQE_OP_BIND_MW			= 0xc,
+	HNS_ROCE_V2_WQE_OP_NOP				= 0x13,
 	HNS_ROCE_V2_WQE_OP_MASK				= 0x1f,
 };
 
-- 
2.33.0




[Index of Archives]     [Linux USB Devel]     [Video for Linux]     [Linux Audio Users]     [Photo]     [Yosemite News]     [Yosemite Photos]     [Linux Kernel]     [Linux SCSI]     [XFree86]

  Powered by Linux