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IB/rdmavt: Add support for tracing events

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This patch adds support of tracing events using the kernels built-in event
tracing infrastructure. This can be extended to provide a wide range of
trace and debug capabilities which have a negligible impact on performance
when enabled. These should be preferred over the use of the rvt_pr*
functions.

Reviewed-by: Ira Weiny <ira.weiny@intel.com>
Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
This commit is contained in:
Dennis Dalessandro 2016-01-22 13:00:28 -08:00 committed by Doug Ledford
parent bfbac097b6
commit 81ba39a82e
4 changed files with 143 additions and 2 deletions
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5
drivers/infiniband/sw/rdmavt/Makefile
View file

@ -7,4 +7,7 @@
#
obj-$(CONFIG_INFINIBAND_RDMAVT) += rdmavt.o
rdmavt-y := vt.o ah.o cq.o dma.o mad.o mcast.o mmap.o mr.o pd.o qp.o srq.o
rdmavt-y := vt.o ah.o cq.o dma.o mad.o mcast.o mmap.o mr.o pd.o qp.o srq.o \
trace.o
CFLAGS_trace.o = -I$(src)

49
drivers/infiniband/sw/rdmavt/trace.c Normal file
View file

@ -0,0 +1,49 @@
/*
* Copyright(c) 2015 Intel Corporation.
*
* This file is provided under a dual BSD/GPLv2 license. When using or
* redistributing this file, you may do so under either license.
*
* GPL LICENSE SUMMARY
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of version 2 of the GNU General Public License as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* BSD LICENSE
*
* 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.
* - Neither the name of Intel Corporation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
#define CREATE_TRACE_POINTS
#include "trace.h"

86
drivers/infiniband/sw/rdmavt/trace.h Normal file
View file

@ -0,0 +1,86 @@
/*
* Copyright(c) 2015 Intel Corporation.
*
* This file is provided under a dual BSD/GPLv2 license. When using or
* redistributing this file, you may do so under either license.
*
* GPL LICENSE SUMMARY
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of version 2 of the GNU General Public License as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* BSD LICENSE
*
* 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.
* - Neither the name of Intel Corporation nor the names of its
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
#undef TRACE_SYSTEM_VAR
#define TRACE_SYSTEM_VAR rdmavt
#if !defined(__RDMAVT_TRACE_H) || defined(TRACE_HEADER_MULTI_READ)
#define __RDMAVT_TRACE_H
#include <linux/tracepoint.h>
#include <linux/trace_seq.h>
#include <rdma/rdma_vt.h>
#define RDI_DEV_ENTRY(rdi) __string(dev, rdi->driver_f.get_card_name(rdi))
#define RDI_DEV_ASSIGN(rdi) __assign_str(dev, rdi->driver_f.get_card_name(rdi))
#undef TRACE_SYSTEM
#define TRACE_SYSTEM rdmavt
TRACE_EVENT(rvt_dbg,
TP_PROTO(struct rvt_dev_info *rdi,
const char *msg),
TP_ARGS(rdi, msg),
TP_STRUCT__entry(
RDI_DEV_ENTRY(rdi)
__string(msg, msg)
),
TP_fast_assign(
RDI_DEV_ASSIGN(rdi);
__assign_str(msg, msg);
),
TP_printk("[%s]: %s", __get_str(dev), __get_str(msg))
);
#endif /* __RDMAVT_TRACE_H */
#undef TRACE_INCLUDE_PATH
#undef TRACE_INCLUDE_FILE
#define TRACE_INCLUDE_PATH .
#define TRACE_INCLUDE_FILE trace
#include <trace/define_trace.h>

5
drivers/infiniband/sw/rdmavt/vt.c
View file

@ -48,6 +48,7 @@
#include <linux/module.h>
#include <linux/kernel.h>
#include "vt.h"
#include "trace.h"
MODULE_LICENSE("Dual BSD/GPL");
MODULE_DESCRIPTION("RDMA Verbs Transport Library");
@ -259,7 +260,8 @@ int rvt_register_device(struct rvt_dev_info *rdi)
return -EINVAL;
}
/* Once we get past here we can use the rvt_pr macros */
/* Once we get past here we can use rvt_pr macros and tracepoints */
trace_rvt_dbg(rdi, "Driver attempting registration");
rvt_mmap_init(rdi);
/* Dev Ops */
@ -370,6 +372,7 @@ EXPORT_SYMBOL(rvt_register_device);
void rvt_unregister_device(struct rvt_dev_info *rdi)
{
trace_rvt_dbg(rdi, "Driver is unregistering.");
if (!rdi)
return;