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, 78 insertions, 0 deletions

diff --git a/drivers/infiniband/sw/rxe/rxe_hw_counters.c b/drivers/infiniband/sw/rxe/rxe_hw_counters.c
new file mode 100644
index 000000000000..7ef90aad7dfd
--- /dev/null
+++ b/drivers/infiniband/sw/rxe/rxe_hw_counters.c
@@ -0,0 +1,78 @@
+/*
+ * Copyright (c) 2017 Mellanox Technologies Ltd. All rights reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses.  You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ *     Redistribution and use in source and binary forms, with or
+ *     without modification, are permitted provided that the following
+ *     conditions are met:
+ *
+ *	- Redistributions of source code must retain the above
+ *	  copyright notice, this list of conditions and the following
+ *	  disclaimer.
+ *
+ *	- Redistributions in binary form must reproduce the above
+ *	  copyright notice, this list of conditions and the following
+ *	  disclaimer in the documentation and/or other materials
+ *	  provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include "rxe.h"
+#include "rxe_hw_counters.h"
+
+const char * const rxe_counter_name[] = {
+	[RXE_CNT_SENT_PKTS]           =  "sent_pkts",
+	[RXE_CNT_RCVD_PKTS]           =  "rcvd_pkts",
+	[RXE_CNT_DUP_REQ]             =  "duplicate_request",
+	[RXE_CNT_OUT_OF_SEQ_REQ]      =  "out_of_sequence",
+	[RXE_CNT_RCV_RNR]             =  "rcvd_rnr_err",
+	[RXE_CNT_SND_RNR]             =  "send_rnr_err",
+	[RXE_CNT_RCV_SEQ_ERR]         =  "rcvd_seq_err",
+	[RXE_CNT_COMPLETER_SCHED]     =  "ack_deffered",
+	[RXE_CNT_RETRY_EXCEEDED]      =  "retry_exceeded_err",
+	[RXE_CNT_RNR_RETRY_EXCEEDED]  =  "retry_rnr_exceeded_err",
+	[RXE_CNT_COMP_RETRY]          =  "completer_retry_err",
+	[RXE_CNT_SEND_ERR]            =  "send_err",
+};
+
+int rxe_ib_get_hw_stats(struct ib_device *ibdev,
+			struct rdma_hw_stats *stats,
+			u8 port, int index)
+{
+	struct rxe_dev *dev = to_rdev(ibdev);
+	unsigned int cnt;
+
+	if (!port || !stats)
+		return -EINVAL;
+
+	for (cnt = 0; cnt  < ARRAY_SIZE(rxe_counter_name); cnt++)
+		stats->value[cnt] = dev->stats_counters[cnt];
+
+	return ARRAY_SIZE(rxe_counter_name);
+}
+
+struct rdma_hw_stats *rxe_ib_alloc_hw_stats(struct ib_device *ibdev,
+					    u8 port_num)
+{
+	BUILD_BUG_ON(ARRAY_SIZE(rxe_counter_name) != RXE_NUM_OF_COUNTERS);
+	/* We support only per port stats */
+	if (!port_num)
+		return NULL;
+
+	return rdma_alloc_hw_stats_struct(rxe_counter_name,
+					  ARRAY_SIZE(rxe_counter_name),
+					  RDMA_HW_STATS_DEFAULT_LIFESPAN);
+}