[PATCH V4 00/18] coresight: tmc: make driver usable by Perf

From	Mathieu Poirier <mathieu.poirier@linaro.org>
Newsgroups	linux.kernel
Subject	[PATCH V4 00/18] coresight: tmc: make driver usable by Perf
Date	2016-04-27 00:20 +0200
Message-ID	<rsjuN-75I-3@gated-at.bofh.it> (permalink)
Organization	linux.* mail to news gateway

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Not sure if another revision was needed but to be on the safe side here
it is. All patches are pretty much the same except for 9/18 and 10/18.
In the former the code has been made clearer by removing the "fast_path"
label while the latter serialize access to the trace trace data from
sysFS.

The patchset makes the TMC driver usable from Perf by way of the
recently added AUX area functionality. Note that only the kernel
side of the operation is presented here. The user space perf tool
enhancement are kept here[1]. Upstreaming of that portion will
follow when the kernel side has been addressed.

The first 15 patches remodel the driver so that the functionality
is compartmented enough to be used as building blocks when interfacing
with the Perf subsystem.

Patch 16 and 17 implement the AUX area API, taking heavily on the existing
ETB10 implementation.

Finally patch 18 allows the TMC to be used as a link rather than a sink,
something that is required when dealing with an ETF component.

Best regards,
Mathieu

[1]. https://git.linaro.org/people/mathieu.poirier/coresight.git/shortlog/refs/heads/perf-opencsd-4.6-rc2

Changes for V4:
- Made functions tmc_enable_etf/etr_sink_sysfs() more readable by
removing the "fast_path" label.
- Consolidated the return path in functions tmc_read_prepare_etf/etr().
- Dealt with race condition nightmares in tmc_open/release() by
serializing access to the trace data buffer.

Changes for V3:
- Reworked drvdata::memwidth assignment.
- cleaned up coresight-tmc.h header file.
- Added WARN_ON[_ONCE]() on error paths.
- Added missing spinlock release.
- Using a type 'long' when dealing with local_[cmp]xchg()
- Added Suzuki K Poulose's Reviewed-by.

Changes for V2:
- Renamed functions tmc_read_prepare/unprepare_etf() to
tmc_read_prepare/unprepare_etb().
- Consolidated return points in functions tmc_enable_etf/etr_sink().
- Re-wrote allocation schemed in functions tmc_enable_etf/etr_sink().
- Fixed description typos in patch 7/15.
- Fixed problem with linksink devices when disabling a path in patch 15/15.

Mathieu Poirier (18):
coresight: tmc: modifying naming convention
coresight: tmc: waiting for TMCReady bit before programming
coresight: tmc: re-implementing tmc_read_prepare/unprepare() functions
coresight: tmc: clearly define number of transfers per burst
coresight: tmc: introducing new header file
coresight: tmc: cleaning up header file
coresight: tmc: splitting driver in ETB/ETF and ETR components
coresight: tmc: making prepare/unprepare functions generic
coresight: tmc: allocating memory when needed
coresight: tmc: getting rid of multiple read access
coresight: tmc: adding mode of operation for link/sinks
coresight: tmc: dump system memory content only when needed
coresight: tmc: make sysFS and Perf mode mutually exclusive
coresight: tmc: keep track of memory width
coresight: moving struct cs_buffers to header file
coresight: tmc: implementing TMC-ETF AUX space API
coresight: tmc: implementing TMC-ETR AUX space API
coresight: configuring ETF in FIFO mode when acting as link

drivers/hwtracing/coresight/Makefile | 4 +-
drivers/hwtracing/coresight/coresight-etb10.c | 20 -
drivers/hwtracing/coresight/coresight-priv.h | 20 +
drivers/hwtracing/coresight/coresight-tmc-etf.c | 603 ++++++++++++++++++++++++
drivers/hwtracing/coresight/coresight-tmc-etr.c | 471 ++++++++++++++++++
drivers/hwtracing/coresight/coresight-tmc.c | 504 +++-----------------
drivers/hwtracing/coresight/coresight-tmc.h | 143 ++++++
drivers/hwtracing/coresight/coresight.c | 32 +-
8 files changed, 1345 insertions(+), 452 deletions(-)
create mode 100644 drivers/hwtracing/coresight/coresight-tmc-etf.c
create mode 100644 drivers/hwtracing/coresight/coresight-tmc-etr.c
create mode 100644 drivers/hwtracing/coresight/coresight-tmc.h

--
2.5.0

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[PATCH V4 00/18] coresight: tmc: make driver usable by Perf Mathieu Poirier <mathieu.poirier@linaro.org> - 2016-04-27 00:20 +0200
  [PATCH V4 09/18] coresight: tmc: allocating memory when needed Mathieu Poirier <mathieu.poirier@linaro.org> - 2016-04-27 00:20 +0200
  [PATCH V4 14/18] coresight: tmc: keep track of memory width Mathieu Poirier <mathieu.poirier@linaro.org> - 2016-04-27 00:20 +0200
  [PATCH V4 15/18] coresight: moving struct cs_buffers to header file Mathieu Poirier <mathieu.poirier@linaro.org> - 2016-04-27 00:20 +0200
  [PATCH V4 04/18] coresight: tmc: clearly define number of transfers per burst Mathieu Poirier <mathieu.poirier@linaro.org> - 2016-04-27 00:20 +0200
  [PATCH V4 16/18] coresight: tmc: implementing TMC-ETF AUX space API Mathieu Poirier <mathieu.poirier@linaro.org> - 2016-04-27 00:20 +0200
    Re: [PATCH V4 16/18] coresight: tmc: implementing TMC-ETF AUX space  API Suzuki K Poulose <Suzuki.Poulose@arm.com> - 2016-04-27 13:30 +0200
      Re: [PATCH V4 16/18] coresight: tmc: implementing TMC-ETF AUX space  API Suzuki K Poulose <Suzuki.Poulose@arm.com> - 2016-04-27 19:30 +0200
      Re: [PATCH V4 16/18] coresight: tmc: implementing TMC-ETF AUX space API Mathieu Poirier <mathieu.poirier@linaro.org> - 2016-04-27 19:30 +0200
  [PATCH V4 11/18] coresight: tmc: adding mode of operation for link/sinks Mathieu Poirier <mathieu.poirier@linaro.org> - 2016-04-27 00:20 +0200
    Re: [PATCH V4 11/18] coresight: tmc: adding mode of operation for  link/sinks Suzuki K Poulose <Suzuki.Poulose@arm.com> - 2016-04-27 11:10 +0200
  [PATCH V4 02/18] coresight: tmc: waiting for TMCReady bit before programming Mathieu Poirier <mathieu.poirier@linaro.org> - 2016-04-27 00:20 +0200
  [PATCH V4 10/18] coresight: tmc: getting rid of multiple read access Mathieu Poirier <mathieu.poirier@linaro.org> - 2016-04-27 00:20 +0200
    Re: [PATCH V4 10/18] coresight: tmc: getting rid of multiple read  access Suzuki K Poulose <Suzuki.Poulose@arm.com> - 2016-04-27 11:00 +0200
  [PATCH V4 05/18] coresight: tmc: introducing new header file Mathieu Poirier <mathieu.poirier@linaro.org> - 2016-04-27 00:20 +0200
  [PATCH V4 08/18] coresight: tmc: making prepare/unprepare functions generic Mathieu Poirier <mathieu.poirier@linaro.org> - 2016-04-27 00:20 +0200
  [PATCH V4 18/18] coresight: configuring ETF in FIFO mode when acting as link Mathieu Poirier <mathieu.poirier@linaro.org> - 2016-04-27 00:20 +0200
  [PATCH V4 06/18] coresight: tmc: cleaning up header file Mathieu Poirier <mathieu.poirier@linaro.org> - 2016-04-27 00:20 +0200

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