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IB/rdmavt: Add support for tracing events
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>
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4 changed files with 143 additions and 2 deletions
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@ -7,4 +7,7 @@
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#
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obj-$(CONFIG_INFINIBAND_RDMAVT) += rdmavt.o
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rdmavt-y := vt.o ah.o cq.o dma.o mad.o mcast.o mmap.o mr.o pd.o qp.o srq.o
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rdmavt-y := vt.o ah.o cq.o dma.o mad.o mcast.o mmap.o mr.o pd.o qp.o srq.o \
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trace.o
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CFLAGS_trace.o = -I$(src)
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49
drivers/infiniband/sw/rdmavt/trace.c
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49
drivers/infiniband/sw/rdmavt/trace.c
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@ -0,0 +1,49 @@
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/*
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* Copyright(c) 2015 Intel Corporation.
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*
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* This file is provided under a dual BSD/GPLv2 license. When using or
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* redistributing this file, you may do so under either license.
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*
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* GPL LICENSE SUMMARY
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of version 2 of the GNU General Public License as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* BSD LICENSE
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* - Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* - Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* - Neither the name of Intel Corporation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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#define CREATE_TRACE_POINTS
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#include "trace.h"
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86
drivers/infiniband/sw/rdmavt/trace.h
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86
drivers/infiniband/sw/rdmavt/trace.h
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@ -0,0 +1,86 @@
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/*
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* Copyright(c) 2015 Intel Corporation.
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*
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* This file is provided under a dual BSD/GPLv2 license. When using or
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* redistributing this file, you may do so under either license.
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*
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* GPL LICENSE SUMMARY
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of version 2 of the GNU General Public License as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* BSD LICENSE
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* - Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* - Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* - Neither the name of Intel Corporation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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#undef TRACE_SYSTEM_VAR
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#define TRACE_SYSTEM_VAR rdmavt
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#if !defined(__RDMAVT_TRACE_H) || defined(TRACE_HEADER_MULTI_READ)
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#define __RDMAVT_TRACE_H
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#include <linux/tracepoint.h>
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#include <linux/trace_seq.h>
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#include <rdma/rdma_vt.h>
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#define RDI_DEV_ENTRY(rdi) __string(dev, rdi->driver_f.get_card_name(rdi))
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#define RDI_DEV_ASSIGN(rdi) __assign_str(dev, rdi->driver_f.get_card_name(rdi))
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#undef TRACE_SYSTEM
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#define TRACE_SYSTEM rdmavt
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TRACE_EVENT(rvt_dbg,
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TP_PROTO(struct rvt_dev_info *rdi,
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const char *msg),
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TP_ARGS(rdi, msg),
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TP_STRUCT__entry(
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RDI_DEV_ENTRY(rdi)
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__string(msg, msg)
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),
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TP_fast_assign(
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RDI_DEV_ASSIGN(rdi);
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__assign_str(msg, msg);
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),
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TP_printk("[%s]: %s", __get_str(dev), __get_str(msg))
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);
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#endif /* __RDMAVT_TRACE_H */
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#undef TRACE_INCLUDE_PATH
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#undef TRACE_INCLUDE_FILE
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#define TRACE_INCLUDE_PATH .
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#define TRACE_INCLUDE_FILE trace
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#include <trace/define_trace.h>
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@ -48,6 +48,7 @@
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include "vt.h"
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#include "trace.h"
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MODULE_LICENSE("Dual BSD/GPL");
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MODULE_DESCRIPTION("RDMA Verbs Transport Library");
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@ -259,7 +260,8 @@ int rvt_register_device(struct rvt_dev_info *rdi)
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return -EINVAL;
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}
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/* Once we get past here we can use the rvt_pr macros */
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/* Once we get past here we can use rvt_pr macros and tracepoints */
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trace_rvt_dbg(rdi, "Driver attempting registration");
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rvt_mmap_init(rdi);
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/* Dev Ops */
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@ -370,6 +372,7 @@ EXPORT_SYMBOL(rvt_register_device);
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void rvt_unregister_device(struct rvt_dev_info *rdi)
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{
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trace_rvt_dbg(rdi, "Driver is unregistering.");
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if (!rdi)
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return;
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