RDMA/hns: Support SW stats with debugfs

Support SW stats with debugfs.

Query output:
$ cat /sys/kernel/debug/hns_roce/hns_0/sw_stat/sw_stat
aeqe                 --- 3341
ceqe                 --- 0
cmds                 --- 6764
cmds_err             --- 0
posted_mbx           --- 3344
polled_mbx           --- 3
mbx_event            --- 3341
qp_create_err        --- 0
qp_modify_err        --- 0
cq_create_err        --- 0
cq_modify_err        --- 0
srq_create_err       --- 0
srq_modify_err       --- 0
xrcd_alloc_err       --- 0
mr_reg_err           --- 0
mr_rereg_err         --- 0
ah_create_err        --- 0
mmap_err             --- 0
uctx_alloc_err       --- 0

Signed-off-by: Junxian Huang <huangjunxian6@hisilicon.com>
Signed-off-by: Chengchang Tang <tangchengchang@huawei.com>
Link: https://lore.kernel.org/r/20231114123449.1106162-4-huangjunxian6@hisilicon.com
Signed-off-by: Leon Romanovsky <leon@kernel.org>

1 files changed, 34 insertions, 13 deletions

diff --git a/drivers/infiniband/hw/hns/hns_roce_hw_v2.c b/drivers/infiniband/hw/hns/hns_roce_hw_v2.c
index 8a5432bb0e85..5d0a7a1394fc 100644
--- a/drivers/infiniband/hw/hns/hns_roce_hw_v2.c
+++ b/drivers/infiniband/hw/hns/hns_roce_hw_v2.c
@@ -1297,6 +1297,8 @@ static int __hns_roce_cmq_send(struct hns_roce_dev *hr_dev,
 	/* Write to hardware */
 	roce_write(hr_dev, ROCEE_TX_CMQ_PI_REG, csq->head);
 
+	atomic64_inc(&hr_dev->dfx_cnt[HNS_ROCE_DFX_CMDS_CNT]);
+
 	do {
 		if (hns_roce_cmq_csq_done(hr_dev))
 			break;
@@ -1334,6 +1336,9 @@ static int __hns_roce_cmq_send(struct hns_roce_dev *hr_dev,
 
 	spin_unlock_bh(&csq->lock);
 
+	if (ret)
+		atomic64_inc(&hr_dev->dfx_cnt[HNS_ROCE_DFX_CMDS_ERR_CNT]);
+
 	return ret;
 }
 
@@ -5662,19 +5667,25 @@ static int hns_roce_v2_modify_srq(struct ib_srq *ibsrq,
 	struct hns_roce_srq_context *srq_context;
 	struct hns_roce_srq_context *srqc_mask;
 	struct hns_roce_cmd_mailbox *mailbox;
-	int ret;
+	int ret = 0;
 
 	/* Resizing SRQs is not supported yet */
-	if (srq_attr_mask & IB_SRQ_MAX_WR)
-		return -EOPNOTSUPP;
+	if (srq_attr_mask & IB_SRQ_MAX_WR) {
+		ret = -EOPNOTSUPP;
+		goto out;
+	}
 
 	if (srq_attr_mask & IB_SRQ_LIMIT) {
-		if (srq_attr->srq_limit > srq->wqe_cnt)
-			return -EINVAL;
+		if (srq_attr->srq_limit > srq->wqe_cnt) {
+			ret = -EINVAL;
+			goto out;
+		}
 
 		mailbox = hns_roce_alloc_cmd_mailbox(hr_dev);
-		if (IS_ERR(mailbox))
-			return PTR_ERR(mailbox);
+		if (IS_ERR(mailbox)) {
+			ret = PTR_ERR(mailbox);
+			goto out;
+		}
 
 		srq_context = mailbox->buf;
 		srqc_mask = (struct hns_roce_srq_context *)mailbox->buf + 1;
@@ -5687,15 +5698,17 @@ static int hns_roce_v2_modify_srq(struct ib_srq *ibsrq,
 		ret = hns_roce_cmd_mbox(hr_dev, mailbox->dma, 0,
 					HNS_ROCE_CMD_MODIFY_SRQC, srq->srqn);
 		hns_roce_free_cmd_mailbox(hr_dev, mailbox);
-		if (ret) {
+		if (ret)
 			ibdev_err(&hr_dev->ib_dev,
 				  "failed to handle cmd of modifying SRQ, ret = %d.\n",
 				  ret);
-			return ret;
-		}
 	}
 
-	return 0;
+out:
+	if (ret)
+		atomic64_inc(&hr_dev->dfx_cnt[HNS_ROCE_DFX_SRQ_MODIFY_ERR_CNT]);
+
+	return ret;
 }
 
 static int hns_roce_v2_query_srq(struct ib_srq *ibsrq, struct ib_srq_attr *attr)
@@ -5739,8 +5752,9 @@ static int hns_roce_v2_modify_cq(struct ib_cq *cq, u16 cq_count, u16 cq_period)
 	int ret;
 
 	mailbox = hns_roce_alloc_cmd_mailbox(hr_dev);
-	if (IS_ERR(mailbox))
-		return PTR_ERR(mailbox);
+	ret = PTR_ERR_OR_ZERO(mailbox);
+	if (ret)
+		goto err_out;
 
 	cq_context = mailbox->buf;
 	cqc_mask = (struct hns_roce_v2_cq_context *)mailbox->buf + 1;
@@ -5770,6 +5784,10 @@ static int hns_roce_v2_modify_cq(struct ib_cq *cq, u16 cq_count, u16 cq_period)
 			  "failed to process cmd when modifying CQ, ret = %d.\n",
 			  ret);
 
+err_out:
+	if (ret)
+		atomic64_inc(&hr_dev->dfx_cnt[HNS_ROCE_DFX_CQ_MODIFY_ERR_CNT]);
+
 	return ret;
 }
 
@@ -6009,6 +6027,8 @@ static irqreturn_t hns_roce_v2_aeq_int(struct hns_roce_dev *hr_dev,
 		++eq->cons_index;
 		aeqe_found = IRQ_HANDLED;
 
+		atomic64_inc(&hr_dev->dfx_cnt[HNS_ROCE_DFX_AEQE_CNT]);
+
 		hns_roce_v2_init_irq_work(hr_dev, eq, queue_num);
 
 		aeqe = next_aeqe_sw_v2(eq);
@@ -6050,6 +6070,7 @@ static irqreturn_t hns_roce_v2_ceq_int(struct hns_roce_dev *hr_dev,
 
 		++eq->cons_index;
 		ceqe_found = IRQ_HANDLED;
+		atomic64_inc(&hr_dev->dfx_cnt[HNS_ROCE_DFX_CEQE_CNT]);
 
 		ceqe = next_ceqe_sw_v2(eq);
 	}