IB/rxe: Add port protocol stats

Expose new counters using the get_hw_stats callback.
We expose the following counters:

+---------------------+----------------------------------------+
|      Name           |           Description                  |
|---------------------+----------------------------------------|
|sent_pkts            | number of sent pkts                    |
|---------------------+----------------------------------------|
|rcvd_pkts            | number of received packets             |
|---------------------+----------------------------------------|
|out_of_sequence      | number of errors due to packet         |
|                     | transport sequence number              |
|---------------------+----------------------------------------|
|duplicate_request    | number of received duplicated packets. |
|                     | A request that previously executed is  |
|                     | named duplicated.                      |
|---------------------+----------------------------------------|
|rcvd_rnr_err         | number of received RNR by completer    |
|---------------------+----------------------------------------|
|send_rnr_err         | number of sent RNR by responder        |
|---------------------+----------------------------------------|
|rcvd_seq_err         | number of out of sequence packets      |
|                     | received                               |
|---------------------+----------------------------------------|
|ack_deffered         | number of deferred handling of ack     |
|                     | packets.                               |
|---------------------+----------------------------------------|
|retry_exceeded_err   | number of times retry exceeded         |
|---------------------+----------------------------------------|
|completer_retry_err  | number of times completer decided to   |
|                     | retry                                  |
|---------------------+----------------------------------------|
|send_err             | number of failed send packet           |
+---------------------+----------------------------------------+

Signed-off-by: Yonatan Cohen <yonatanc@mellanox.com>
Reviewed-by: Moni Shoua <monis@mellanox.com>
Reviewed-by: Andrew Boyer <andrew.boyer@dell.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Doug Ledford <dledford@redhat.com>

1 files changed, 13 insertions, 1 deletions

diff --git a/drivers/infiniband/sw/rxe/rxe_comp.c b/drivers/infiniband/sw/rxe/rxe_comp.c
index 4cd55d5617f7..9eb12c2e3c74 100644
--- a/drivers/infiniband/sw/rxe/rxe_comp.c
+++ b/drivers/infiniband/sw/rxe/rxe_comp.c
@@ -154,6 +154,8 @@ void rxe_comp_queue_pkt(struct rxe_dev *rxe, struct rxe_qp *qp,
 	skb_queue_tail(&qp->resp_pkts, skb);
 
 	must_sched = skb_queue_len(&qp->resp_pkts) > 1;
+	if (must_sched != 0)
+		rxe_counter_inc(rxe, RXE_CNT_COMPLETER_SCHED);
 	rxe_run_task(&qp->comp.task, must_sched);
 }
 
@@ -236,6 +238,7 @@ static inline enum comp_state check_ack(struct rxe_qp *qp,
 {
 	unsigned int mask = pkt->mask;
 	u8 syn;
+	struct rxe_dev *rxe = to_rdev(qp->ibqp.device);
 
 	/* Check the sequence only */
 	switch (qp->comp.opcode) {
@@ -298,6 +301,7 @@ static inline enum comp_state check_ack(struct rxe_qp *qp,
 			return COMPST_WRITE_SEND;
 
 		case AETH_RNR_NAK:
+			rxe_counter_inc(rxe, RXE_CNT_RCV_RNR);
 			return COMPST_RNR_RETRY;
 
 		case AETH_NAK:
@@ -307,6 +311,8 @@ static inline enum comp_state check_ack(struct rxe_qp *qp,
 				 * before
 				 */
 				if (psn_compare(pkt->psn, qp->comp.psn) > 0) {
+					rxe_counter_inc(rxe,
+							RXE_CNT_RCV_SEQ_ERR);
 					qp->comp.psn = pkt->psn;
 					if (qp->req.wait_psn) {
 						qp->req.wait_psn = 0;
@@ -534,6 +540,7 @@ static void rxe_drain_resp_pkts(struct rxe_qp *qp, bool notify)
 int rxe_completer(void *arg)
 {
 	struct rxe_qp *qp = (struct rxe_qp *)arg;
+	struct rxe_dev *rxe = to_rdev(qp->ibqp.device);
 	struct rxe_send_wqe *wqe = wqe;
 	struct sk_buff *skb = NULL;
 	struct rxe_pkt_info *pkt = NULL;
@@ -683,8 +690,10 @@ int rxe_completer(void *arg)
 				if (psn_compare(qp->req.psn,
 						qp->comp.psn) > 0) {
 					/* tell the requester to retry the
-					 * send send queue next time around
+					 * send queue next time around
 					 */
+					rxe_counter_inc(rxe,
+							RXE_CNT_COMP_RETRY);
 					qp->req.need_retry = 1;
 					rxe_run_task(&qp->req.task, 1);
 				}
@@ -699,6 +708,7 @@ int rxe_completer(void *arg)
 				goto exit;
 
 			} else {
+				rxe_counter_inc(rxe, RXE_CNT_RETRY_EXCEEDED);
 				wqe->status = IB_WC_RETRY_EXC_ERR;
 				state = COMPST_ERROR;
 			}
@@ -720,6 +730,8 @@ int rxe_completer(void *arg)
 				skb = NULL;
 				goto exit;
 			} else {
+				rxe_counter_inc(rxe,
+						RXE_CNT_RNR_RETRY_EXCEEDED);
 				wqe->status = IB_WC_RNR_RETRY_EXC_ERR;
 				state = COMPST_ERROR;
 			}