IB/MAD: Add send path trace points

Use the standard Linux trace mechanism to trace MADs being sent.  4 trace
points are added, when the MAD is posted to the qp, when the MAD is
completed, if a MAD is resent, and when the MAD completes in error.

Reviewed-by: "Ruhl, Michael J" <michael.j.ruhl@intel.com>
Suggested-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Reviewed-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Signed-off-by: Ira Weiny <ira.weiny@intel.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>

1 files changed, 187 insertions, 0 deletions

diff --git a/include/trace/events/ib_mad.h b/include/trace/events/ib_mad.h
new file mode 100644
index 000000000000..585028f17fa7
--- /dev/null
+++ b/include/trace/events/ib_mad.h
@@ -0,0 +1,187 @@
+/* SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB */
+
+/*
+ * Copyright (c) 2018 Intel Corporation.  All rights reserved.
+ */
+
+#undef TRACE_SYSTEM
+#define TRACE_SYSTEM ib_mad
+
+#if !defined(_TRACE_IB_MAD_H) || defined(TRACE_HEADER_MULTI_READ)
+#define _TRACE_IB_MAD_H
+
+#include <linux/tracepoint.h>
+#include <rdma/ib_mad.h>
+
+#ifdef CONFIG_TRACEPOINTS
+struct trace_event_raw_ib_mad_send_template;
+static void create_mad_addr_info(struct ib_mad_send_wr_private *mad_send_wr,
+			  struct ib_mad_qp_info *qp_info,
+			  struct trace_event_raw_ib_mad_send_template *entry);
+#endif
+
+DECLARE_EVENT_CLASS(ib_mad_send_template,
+	TP_PROTO(struct ib_mad_send_wr_private *wr,
+		 struct ib_mad_qp_info *qp_info),
+	TP_ARGS(wr, qp_info),
+
+	TP_STRUCT__entry(
+		__field(u8,             base_version)
+		__field(u8,             mgmt_class)
+		__field(u8,             class_version)
+		__field(u8,             port_num)
+		__field(u32,            qp_num)
+		__field(u8,             method)
+		__field(u8,             sl)
+		__field(u16,            attr_id)
+		__field(u32,            attr_mod)
+		__field(u64,            wrtid)
+		__field(u64,            tid)
+		__field(u16,            status)
+		__field(u16,            class_specific)
+		__field(u32,            length)
+		__field(u32,            dlid)
+		__field(u32,            rqpn)
+		__field(u32,            rqkey)
+		__field(u32,            dev_index)
+		__field(void *,         agent_priv)
+		__field(unsigned long,  timeout)
+		__field(int,            retries_left)
+		__field(int,            max_retries)
+		__field(int,            retry)
+		__field(u16,            pkey)
+	),
+
+	TP_fast_assign(
+		__entry->dev_index = wr->mad_agent_priv->agent.device->index;
+		__entry->port_num = wr->mad_agent_priv->agent.port_num;
+		__entry->qp_num = wr->mad_agent_priv->qp_info->qp->qp_num;
+		__entry->agent_priv = wr->mad_agent_priv;
+		__entry->wrtid = wr->tid;
+		__entry->max_retries = wr->max_retries;
+		__entry->retries_left = wr->retries_left;
+		__entry->retry = wr->retry;
+		__entry->timeout = wr->timeout;
+		__entry->length = wr->send_buf.hdr_len +
+				  wr->send_buf.data_len;
+		__entry->base_version =
+			((struct ib_mad_hdr *)wr->send_buf.mad)->base_version;
+		__entry->mgmt_class =
+			((struct ib_mad_hdr *)wr->send_buf.mad)->mgmt_class;
+		__entry->class_version =
+			((struct ib_mad_hdr *)wr->send_buf.mad)->class_version;
+		__entry->method =
+			((struct ib_mad_hdr *)wr->send_buf.mad)->method;
+		__entry->status =
+			((struct ib_mad_hdr *)wr->send_buf.mad)->status;
+		__entry->class_specific =
+			((struct ib_mad_hdr *)wr->send_buf.mad)->class_specific;
+		__entry->tid = ((struct ib_mad_hdr *)wr->send_buf.mad)->tid;
+		__entry->attr_id =
+			((struct ib_mad_hdr *)wr->send_buf.mad)->attr_id;
+		__entry->attr_mod =
+			((struct ib_mad_hdr *)wr->send_buf.mad)->attr_mod;
+		create_mad_addr_info(wr, qp_info, __entry);
+	),
+
+	TP_printk("%d:%d QP%d agent %p: " \
+		  "wrtid 0x%llx; %d/%d retries(%d); timeout %lu length %d : " \
+		  "hdr : base_ver 0x%x class 0x%x class_ver 0x%x " \
+		  "method 0x%x status 0x%x class_specific 0x%x tid 0x%llx " \
+		  "attr_id 0x%x attr_mod 0x%x  => dlid 0x%08x sl %d "\
+		  "pkey 0x%x rpqn 0x%x rqpkey 0x%x",
+		__entry->dev_index, __entry->port_num, __entry->qp_num,
+		__entry->agent_priv, be64_to_cpu(__entry->wrtid),
+		__entry->retries_left, __entry->max_retries,
+		__entry->retry, __entry->timeout, __entry->length,
+		__entry->base_version, __entry->mgmt_class,
+		__entry->class_version,
+		__entry->method, be16_to_cpu(__entry->status),
+		be16_to_cpu(__entry->class_specific),
+		be64_to_cpu(__entry->tid), be16_to_cpu(__entry->attr_id),
+		be32_to_cpu(__entry->attr_mod),
+		be32_to_cpu(__entry->dlid), __entry->sl, __entry->pkey,
+		__entry->rqpn, __entry->rqkey
+	)
+);
+
+DEFINE_EVENT(ib_mad_send_template, ib_mad_error_handler,
+	TP_PROTO(struct ib_mad_send_wr_private *wr,
+		 struct ib_mad_qp_info *qp_info),
+	TP_ARGS(wr, qp_info));
+DEFINE_EVENT(ib_mad_send_template, ib_mad_ib_send_mad,
+	TP_PROTO(struct ib_mad_send_wr_private *wr,
+		 struct ib_mad_qp_info *qp_info),
+	TP_ARGS(wr, qp_info));
+DEFINE_EVENT(ib_mad_send_template, ib_mad_send_done_resend,
+	TP_PROTO(struct ib_mad_send_wr_private *wr,
+		 struct ib_mad_qp_info *qp_info),
+	TP_ARGS(wr, qp_info));
+
+TRACE_EVENT(ib_mad_send_done_handler,
+	TP_PROTO(struct ib_mad_send_wr_private *wr, struct ib_wc *wc),
+	TP_ARGS(wr, wc),
+
+	TP_STRUCT__entry(
+		__field(u8,             port_num)
+		__field(u8,             base_version)
+		__field(u8,             mgmt_class)
+		__field(u8,             class_version)
+		__field(u32,            qp_num)
+		__field(u64,            wrtid)
+		__field(u16,            status)
+		__field(u16,            wc_status)
+		__field(u32,            length)
+		__field(void *,         agent_priv)
+		__field(unsigned long,  timeout)
+		__field(u32,            dev_index)
+		__field(int,            retries_left)
+		__field(int,            max_retries)
+		__field(int,            retry)
+		__field(u8,             method)
+	),
+
+	TP_fast_assign(
+		__entry->dev_index = wr->mad_agent_priv->agent.device->index;
+		__entry->port_num = wr->mad_agent_priv->agent.port_num;
+		__entry->qp_num = wr->mad_agent_priv->qp_info->qp->qp_num;
+		__entry->agent_priv = wr->mad_agent_priv;
+		__entry->wrtid = wr->tid;
+		__entry->max_retries = wr->max_retries;
+		__entry->retries_left = wr->retries_left;
+		__entry->retry = wr->retry;
+		__entry->timeout = wr->timeout;
+		__entry->base_version =
+			((struct ib_mad_hdr *)wr->send_buf.mad)->base_version;
+		__entry->mgmt_class =
+			((struct ib_mad_hdr *)wr->send_buf.mad)->mgmt_class;
+		__entry->class_version =
+			((struct ib_mad_hdr *)wr->send_buf.mad)->class_version;
+		__entry->method =
+			((struct ib_mad_hdr *)wr->send_buf.mad)->method;
+		__entry->status =
+			((struct ib_mad_hdr *)wr->send_buf.mad)->status;
+		__entry->wc_status = wc->status;
+		__entry->length = wc->byte_len;
+	),
+
+	TP_printk("%d:%d QP%d : SEND WC Status %d : agent %p: " \
+		  "wrtid 0x%llx %d/%d retries(%d) timeout %lu length %d: " \
+		  "hdr : base_ver 0x%x class 0x%x class_ver 0x%x " \
+		  "method 0x%x status 0x%x",
+		__entry->dev_index, __entry->port_num, __entry->qp_num,
+		__entry->wc_status,
+		__entry->agent_priv, be64_to_cpu(__entry->wrtid),
+		__entry->retries_left, __entry->max_retries,
+		__entry->retry, __entry->timeout,
+		__entry->length,
+		__entry->base_version, __entry->mgmt_class,
+		__entry->class_version, __entry->method,
+		be16_to_cpu(__entry->status)
+	)
+);
+
+
+#endif /* _TRACE_IB_MAD_H */
+
+#include <trace/define_trace.h>