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[RFC,for-next] RDMA/hns: Add NOP operation for sending WR

Message ID 20220316090835.54369-1-liangwenpeng@huawei.com (mailing list archive)
State Superseded
Headers show
Series [RFC,for-next] RDMA/hns: Add NOP operation for sending WR | expand

Commit Message

Wenpeng Liang March 16, 2022, 9:08 a.m. UTC 
From: Yangyang Li <liyangyang20@huawei.com>

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@huawei.com>
Signed-off-by: Wenpeng Liang <liangwenpeng@huawei.com>
---
 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(+)

--
2.33.0
diff mbox series

Patch

diff --git a/drivers/infiniband/hw/hns/hns_roce_hw_v2.c b/drivers/infiniband/hw/hns/hns_roce_hw_v2.c
index 06eb4f00428c..05b6008a7393 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_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_OPC_MAP(RDMA_WRITE,			RDMA_WRITE),
 	HR_OPC_MAP(RDMA_WRITE_WITH_IMM,		RDMA_WRITE_WITH_IMM),
@@ -86,6 +89,7 @@  static const u32 hns_roce_op_code[] = {
 	HR_OPC_MAP(MASKED_ATOMIC_CMP_AND_SWP,	ATOM_MSK_CMP_AND_SWAP),
 	HR_OPC_MAP(MASKED_ATOMIC_FETCH_AND_ADD,	ATOM_MSK_FETCH_AND_ADD),
 	HR_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:
@@ -3572,6 +3577,9 @@  static int get_cur_qp(struct hns_roce_cq *hr_cq, struct hns_roce_v2_cqe *cqe,
 #define HR_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_WC_OP_MAP(SEND,			SEND),
 	HR_WC_OP_MAP(SEND_WITH_INV,		SEND),
@@ -3586,6 +3594,7 @@  static const u32 wc_send_op_map[] = {
 	HR_WC_OP_MAP(ATOM_MSK_FETCH_AND_ADD,	MASKED_FETCH_ADD),
 	HR_WC_OP_MAP(FAST_REG_PMR,		REG_MR),
 	HR_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 12be85f0986e..5abef5c0396d 100644
--- a/drivers/infiniband/hw/hns/hns_roce_hw_v2.h
+++ b/drivers/infiniband/hw/hns/hns_roce_hw_v2.h
@@ -158,6 +158,14 @@  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,
@@ -172,6 +180,7 @@  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,
 };