From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752128AbcBFLFK (ORCPT ); Sat, 6 Feb 2016 06:05:10 -0500 Received: from mail-pa0-f41.google.com ([209.85.220.41]:33570 "EHLO mail-pa0-f41.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752011AbcBFLFG (ORCPT ); Sat, 6 Feb 2016 06:05:06 -0500 From: Chunyan Zhang To: mathieu.poirier@linaro.org, alexander.shishkin@linux.intel.com Cc: mike.leach@arm.com, Michael.Williams@arm.com, al.grant@arm.com, tor@ti.com, nicolas.guion@st.com, broonie@kernel.org, robh@kernel.org, pratikp@codeaurora.org, corbet@lwn.net, mark.rutland@arm.com, zhang.lyra@gmail.com, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-api@vger.kernel.org, linux-doc@vger.kernel.org Subject: [PATCH V3 0/6] Introduce CoreSight STM support Date: Sat, 6 Feb 2016 19:04:26 +0800 Message-Id: <1454756672-12790-1-git-send-email-zhang.chunyan@linaro.org> X-Mailer: git-send-email 1.9.1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This patchset adds support for CoreSight STM IP block. It also makes a little modification to the generic STM framework to cover the CoreSight STM requirements. Full description follows the changelog. Changes from v1: - Added a definition of coresight_simple_func() in CS-STM driver to avoid the kbuild test robot error for the time being. This modification will be removed when merging the code in which the coresight_simple_func() has been moved to the header file. - Calculate the channel number according to the channel memory space size. Changes from V2: - Changed to return -EFAULT if failed on the command STP_GET_OPTIONS. - Used Alex's patch [1] instead of the last 2/6. - Removed the while loop from stm_send(), since the packet size passed to it isn't larger than 4 bytes on 32-bit system and 8 bytes on 64-bit system. - Removed stm_send_64bit(), since the process of packets on 64-bit CS-STM should be basically the same with on 32-bit system, except the maximum length of writing STM at a time. - Removed the support of writing 64-bit to CoreSight STM buffer at a time on 32-bit ARM architecture according to an ARM engineer suggestion. As he said that the STM might receive a 64-bit write, or might receive a pair of 32-bit writes to the two addressed words in either order. So 64-bit write isn't guaranteed to work on the ARM 32-bit architecture. Thanks, Chunyan [1] https://lkml.org/lkml/2016/2/4/652 Alexander Shishkin (1): stm class: Support devices with multiple instances Chunyan Zhang (2): stm class: Add ioctl get_options interface Documentations: Add explanations of the case for non-configurable masters Mathieu Poirier (2): stm class: provision for statically assigned masterIDs coresight-stm: Bindings for System Trace Macrocell Pratik Patel (1): coresight-stm: adding driver for CoreSight STM component .../ABI/testing/sysfs-bus-coresight-devices-stm | 53 ++ .../devicetree/bindings/arm/coresight.txt | 28 + Documentation/trace/coresight.txt | 37 +- Documentation/trace/stm.txt | 6 + drivers/hwtracing/coresight/Kconfig | 11 + drivers/hwtracing/coresight/Makefile | 1 + drivers/hwtracing/coresight/coresight-stm.c | 928 +++++++++++++++++++++ drivers/hwtracing/stm/core.c | 30 +- drivers/hwtracing/stm/policy.c | 25 +- include/linux/coresight-stm.h | 6 + include/linux/stm.h | 11 + include/uapi/linux/coresight-stm.h | 12 + include/uapi/linux/stm.h | 1 + 13 files changed, 1140 insertions(+), 9 deletions(-) create mode 100644 Documentation/ABI/testing/sysfs-bus-coresight-devices-stm create mode 100644 drivers/hwtracing/coresight/coresight-stm.c create mode 100644 include/linux/coresight-stm.h create mode 100644 include/uapi/linux/coresight-stm.h -- 1.9.1