From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752436AbcDZWKk (ORCPT ); Tue, 26 Apr 2016 18:10:40 -0400 Received: from mail-io0-f175.google.com ([209.85.223.175]:34000 "EHLO mail-io0-f175.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751986AbcDZWKi (ORCPT ); Tue, 26 Apr 2016 18:10:38 -0400 From: Mathieu Poirier To: linux-arm-kernel@lists.infradead.org, Suzuki.Poulose@arm.com Cc: linux-kernel@vger.kernel.org Subject: [PATCH V4 00/18] coresight: tmc: make driver usable by Perf Date: Tue, 26 Apr 2016 16:10:16 -0600 Message-Id: <1461708634-6327-1-git-send-email-mathieu.poirier@linaro.org> X-Mailer: git-send-email 2.5.0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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 From mboxrd@z Thu Jan 1 00:00:00 1970 From: mathieu.poirier@linaro.org (Mathieu Poirier) Date: Tue, 26 Apr 2016 16:10:16 -0600 Subject: [PATCH V4 00/18] coresight: tmc: make driver usable by Perf Message-ID: <1461708634-6327-1-git-send-email-mathieu.poirier@linaro.org> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org 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