RDMA/hns: Fix timeout attr in query qp for HIP08

mainline inclusion
from mainline-v6.4-rc5
commit 58caa2a5
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I76PRT
CVE: NA

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=58caa2a51ad4fd21763696cc6c4defc9fc1b4b4f

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

On HIP08, the queried timeout attr is different from the timeout attr
configured by the user.

It is found by rdma-core testcase test_rdmacm_async_traffic:

======================================================================
FAIL: test_rdmacm_async_traffic (tests.test_rdmacm.CMTestCase)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "./tests/test_rdmacm.py", line 33, in test_rdmacm_async_traffic
    self.two_nodes_rdmacm_traffic(CMAsyncConnection, self.rdmacm_traffic,
  File "./tests/base.py", line 382, in two_nodes_rdmacm_traffic
    raise(res)
AssertionError

Fixes: 926a01dc ("RDMA/hns: Add QP operations support for hip08 SoC")
Link: https://lore.kernel.org/r/20230512092245.344442-2-huangjunxian6@hisilicon.comSigned-off-by: NChengchang Tang <tangchengchang@huawei.com>
Signed-off-by: NJunxian Huang <huangjunxian6@hisilicon.com>
Signed-off-by: NJason Gunthorpe <jgg@nvidia.com>
Signed-off-by: NJuan Zhou <zhoujuan51@h-partners.com>

drivers/infiniband/hw/hns/hns_roce_hw_v2.c

@@ -5334,7 +5334,6 @@ static int hns_roce_v2_set_abs_fields(struct ib_qp *ibqp,
 static bool check_qp_timeout_cfg_range(struct hns_roce_dev *hr_dev, u8 *timeout)
 {
 #define QP_ACK_TIMEOUT_MAX_HIP08 20
-#define QP_ACK_TIMEOUT_OFFSET 10
 #define QP_ACK_TIMEOUT_MAX 31
 
 	if (hr_dev->pci_dev->revision == PCI_REVISION_ID_HIP08) {
@@ -5343,7 +5342,7 @@ static bool check_qp_timeout_cfg_range(struct hns_roce_dev *hr_dev, u8 *timeout)
 				   "Local ACK timeout shall be 0 to 20.\n");
 			return false;
 		}
-		*timeout += QP_ACK_TIMEOUT_OFFSET;
+		*timeout += HNS_ROCE_V2_QP_ACK_TIMEOUT_OFS_HIP08;
 	} else if (hr_dev->pci_dev->revision > PCI_REVISION_ID_HIP08) {
 		if (*timeout > QP_ACK_TIMEOUT_MAX) {
 			ibdev_warn(&hr_dev->ib_dev,
@@ -5673,6 +5672,18 @@ static int hns_roce_v2_query_qpc(struct hns_roce_dev *hr_dev, u32 qpn,
 	return ret;
 }
 
+static u8 get_qp_timeout_attr(struct hns_roce_dev *hr_dev,
+			      struct hns_roce_v2_qp_context *context)
+{
+	u8 timeout;
+
+	timeout = (u8)hr_reg_read(context, QPC_AT);
+	if (hr_dev->pci_dev->revision == PCI_REVISION_ID_HIP08)
+		timeout -= HNS_ROCE_V2_QP_ACK_TIMEOUT_OFS_HIP08;
+
+	return timeout;
+}
+
 static int hns_roce_v2_query_qp(struct ib_qp *ibqp, struct ib_qp_attr *qp_attr,
 				int qp_attr_mask,
 				struct ib_qp_init_attr *qp_init_attr)
@@ -5750,7 +5761,7 @@ static int hns_roce_v2_query_qp(struct ib_qp *ibqp, struct ib_qp_attr *qp_attr,
 	qp_attr->max_dest_rd_atomic = 1 << hr_reg_read(&context, QPC_RR_MAX);
 
 	qp_attr->min_rnr_timer = (u8)hr_reg_read(&context, QPC_MIN_RNR_TIME);
-	qp_attr->timeout = (u8)hr_reg_read(&context, QPC_AT);
+	qp_attr->timeout = get_qp_timeout_attr(hr_dev, &context);
 	qp_attr->retry_cnt = hr_reg_read(&context, QPC_RETRY_NUM_INIT);
 	qp_attr->rnr_retry = hr_reg_read(&context, QPC_RNR_NUM_INIT);
 

drivers/infiniband/hw/hns/hns_roce_hw_v2.h

@@ -42,6 +42,8 @@
 #define HNS_ROCE_V2_MAX_SRQWQE_SEGS		0x1000000
 #define HNS_ROCE_V2_MAX_IDX_SEGS		0x1000000
 
+#define HNS_ROCE_V2_QP_ACK_TIMEOUT_OFS_HIP08	10
+
 #define HNS_ROCE_V3_SCCC_SZ			64
 #define HNS_ROCE_V3_GMV_ENTRY_SZ		32