From: Sai Prakash Ranjan <saiprakash.ranjan@codeaurora.org> To: Mathieu Poirier <mathieu.poirier@linaro.org>, Suzuki K Poulose <suzuki.poulose@arm.com>, Mike Leach <mike.leach@linaro.org> Cc: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org, coresight@lists.linaro.org, Stephen Boyd <swboyd@chromium.org>, Sai Prakash Ranjan <saiprakash.ranjan@codeaurora.org> Subject: [PATCH 0/2] coresight: tmc: Add shutdown callback for TMC ETR/ETF Date: Mon, 1 Jun 2020 13:32:24 +0530 [thread overview] Message-ID: <cover.1590947174.git.saiprakash.ranjan@codeaurora.org> (raw) This series adds a shutdown callback to TMC ETR/ETF to ensure that it is properly shutdown in reboot/shutdown path. This is required for ETR/ETF which has SMMU address translation enabled like on SC7180 SoC and few others. If the hardware is still accessing memory after SMMU translation is disabled as part of SMMU shutdown callback in system reboot or shutdown path, then IOVAs(I/O virtual address) which it was using will go on the bus as the physical addresses which might result in unknown crashes (NoC/interconnect errors). So we make sure from this shutdown callback that the ETR/ETF is shutdown before SMMU translation is disabled and device_link in SMMU driver will take care of ordering of shutdown callbacks such that SMMU shutdown callback is not called before any of its consumer shutdown callbacks. Sai Prakash Ranjan (2): coresight: tmc: Add enable flag to indicate the status of ETR/ETF coresight: tmc: Add shutdown callback for TMC ETR/ETF .../hwtracing/coresight/coresight-tmc-etf.c | 4 +-- .../hwtracing/coresight/coresight-tmc-etr.c | 2 +- drivers/hwtracing/coresight/coresight-tmc.c | 31 +++++++++++++++++++ drivers/hwtracing/coresight/coresight-tmc.h | 5 +++ 4 files changed, 39 insertions(+), 3 deletions(-) base-commit: 059e38815950dbec65beafe03757bce9436e89a4 -- QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by The Linux Foundation
WARNING: multiple messages have this Message-ID (diff)
From: Sai Prakash Ranjan <saiprakash.ranjan@codeaurora.org> To: Mathieu Poirier <mathieu.poirier@linaro.org>, Suzuki K Poulose <suzuki.poulose@arm.com>, Mike Leach <mike.leach@linaro.org> Cc: Sai Prakash Ranjan <saiprakash.ranjan@codeaurora.org>, linux-arm-msm@vger.kernel.org, coresight@lists.linaro.org, linux-kernel@vger.kernel.org, Stephen Boyd <swboyd@chromium.org>, linux-arm-kernel@lists.infradead.org Subject: [PATCH 0/2] coresight: tmc: Add shutdown callback for TMC ETR/ETF Date: Mon, 1 Jun 2020 13:32:24 +0530 [thread overview] Message-ID: <cover.1590947174.git.saiprakash.ranjan@codeaurora.org> (raw) This series adds a shutdown callback to TMC ETR/ETF to ensure that it is properly shutdown in reboot/shutdown path. This is required for ETR/ETF which has SMMU address translation enabled like on SC7180 SoC and few others. If the hardware is still accessing memory after SMMU translation is disabled as part of SMMU shutdown callback in system reboot or shutdown path, then IOVAs(I/O virtual address) which it was using will go on the bus as the physical addresses which might result in unknown crashes (NoC/interconnect errors). So we make sure from this shutdown callback that the ETR/ETF is shutdown before SMMU translation is disabled and device_link in SMMU driver will take care of ordering of shutdown callbacks such that SMMU shutdown callback is not called before any of its consumer shutdown callbacks. Sai Prakash Ranjan (2): coresight: tmc: Add enable flag to indicate the status of ETR/ETF coresight: tmc: Add shutdown callback for TMC ETR/ETF .../hwtracing/coresight/coresight-tmc-etf.c | 4 +-- .../hwtracing/coresight/coresight-tmc-etr.c | 2 +- drivers/hwtracing/coresight/coresight-tmc.c | 31 +++++++++++++++++++ drivers/hwtracing/coresight/coresight-tmc.h | 5 +++ 4 files changed, 39 insertions(+), 3 deletions(-) base-commit: 059e38815950dbec65beafe03757bce9436e89a4 -- QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by The Linux Foundation _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next reply other threads:[~2020-06-01 8:02 UTC|newest] Thread overview: 58+ messages / expand[flat|nested] mbox.gz Atom feed top 2020-06-01 8:02 Sai Prakash Ranjan [this message] 2020-06-01 8:02 ` [PATCH 0/2] coresight: tmc: Add shutdown callback for TMC ETR/ETF Sai Prakash Ranjan 2020-06-01 8:02 ` [PATCH 1/2] coresight: tmc: Add enable flag to indicate the status of ETR/ETF Sai Prakash Ranjan 2020-06-01 8:02 ` Sai Prakash Ranjan 2020-06-01 13:27 ` Mike Leach 2020-06-01 13:27 ` Mike Leach 2020-06-01 17:13 ` Sai Prakash Ranjan 2020-06-01 17:13 ` Sai Prakash Ranjan 2020-06-01 8:02 ` [PATCH 2/2] coresight: tmc: Add shutdown callback for TMC ETR/ETF Sai Prakash Ranjan 2020-06-01 8:02 ` Sai Prakash Ranjan 2020-06-01 13:35 ` Mike Leach 2020-06-01 13:35 ` Mike Leach 2020-06-01 17:15 ` Sai Prakash Ranjan 2020-06-01 17:15 ` Sai Prakash Ranjan 2020-06-01 21:28 ` Mathieu Poirier 2020-06-01 21:28 ` Mathieu Poirier 2020-06-02 7:30 ` Sai Prakash Ranjan 2020-06-02 7:30 ` Sai Prakash Ranjan 2020-06-02 22:12 ` Mike Leach 2020-06-02 22:12 ` Mike Leach 2020-06-03 10:24 ` Sai Prakash Ranjan 2020-06-03 10:24 ` Sai Prakash Ranjan 2020-06-03 11:27 ` Mike Leach 2020-06-03 11:27 ` Mike Leach 2020-06-03 12:14 ` Sai Prakash Ranjan 2020-06-03 12:14 ` Sai Prakash Ranjan 2020-06-03 13:22 ` Mike Leach 2020-06-03 13:22 ` Mike Leach 2020-06-03 13:34 ` Robin Murphy 2020-06-03 13:34 ` Robin Murphy 2020-06-03 13:43 ` Sai Prakash Ranjan 2020-06-03 13:43 ` Sai Prakash Ranjan 2020-06-03 13:51 ` Mike Leach 2020-06-03 13:51 ` Mike Leach 2020-06-03 14:02 ` Sai Prakash Ranjan 2020-06-03 14:02 ` Sai Prakash Ranjan 2020-06-03 17:44 ` Mathieu Poirier 2020-06-03 17:44 ` Mathieu Poirier 2020-06-04 7:27 ` Sai Prakash Ranjan 2020-06-04 7:27 ` Sai Prakash Ranjan 2020-06-08 14:07 ` Sai Prakash Ranjan 2020-06-08 14:07 ` Sai Prakash Ranjan 2020-06-09 15:27 ` Mathieu Poirier 2020-06-09 15:27 ` Mathieu Poirier 2020-06-09 15:37 ` Sai Prakash Ranjan 2020-06-09 15:37 ` Sai Prakash Ranjan 2020-06-03 11:37 ` Robin Murphy 2020-06-03 11:37 ` Robin Murphy 2020-06-03 12:00 ` Sai Prakash Ranjan 2020-06-03 12:00 ` Sai Prakash Ranjan 2020-06-03 12:21 ` Robin Murphy 2020-06-03 12:21 ` Robin Murphy 2020-06-03 12:26 ` Sai Prakash Ranjan 2020-06-03 12:26 ` Sai Prakash Ranjan 2020-06-03 13:40 ` Robin Murphy 2020-06-03 13:40 ` Robin Murphy 2020-06-03 13:51 ` Sai Prakash Ranjan 2020-06-03 13:51 ` Sai Prakash Ranjan
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