From: Vivek Gautam <vivek.gautam-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org> To: Robin Murphy <robin.murphy-5wv7dgnIgG8@public.gmane.org>, Will Deacon <will.deacon-5wv7dgnIgG8@public.gmane.org> Cc: Mark Rutland <mark.rutland-5wv7dgnIgG8@public.gmane.org>, "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" <devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>, Linux PM <linux-pm-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>, sboyd-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org, linux-arm-msm <linux-arm-msm-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>, "Rafael J. Wysocki" <rjw-LthD3rsA81gm4RdzfppkhA@public.gmane.org>, open list <linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>, "list-Y9sIeH5OGRo@public.gmane.org:IOMMU DRIVERS <iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org>, Joerg Roedel <joro-zLv9SwRftAIdnm+yROfE0A@public.gmane.org>, " <iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org>, Tomasz Figa <tfiga-F7+t8E8rja9g9hUCZPvPmw@public.gmane.org>, alex.williamson-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org, robh+dt <robh+dt-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>, freedreno <freedreno-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org> Subject: Re: [PATCH v16 2/5] iommu/arm-smmu: Invoke pm_runtime during probe, add/remove device Date: Tue, 25 Sep 2018 11:26:04 +0530 [thread overview] Message-ID: <CAFp+6iFvhdSq7upbvsEWgMewhAaaRM91iw9p7qOFPYrUxis0Hg@mail.gmail.com> (raw) In-Reply-To: <CAFp+6iHnHj_PkPFBUSTdJTW57K51wLqSEw6VOMKxAVo7O+ms9g-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org> Hi Robin, Will, On Tue, Sep 18, 2018 at 8:41 AM Vivek Gautam <vivek.gautam@codeaurora.org> wrote: > > Hi Robin, > > On Fri, Sep 7, 2018 at 3:52 PM Vivek Gautam <vivek.gautam@codeaurora.org> wrote: > > > > On Fri, Sep 7, 2018 at 3:22 PM Tomasz Figa <tfiga@chromium.org> wrote: > > > > > > On Fri, Sep 7, 2018 at 6:38 PM Vivek Gautam <vivek.gautam@codeaurora.org> wrote: > > > > > > > > Hi Tomasz, > > > > > > > > > > > > On 9/7/2018 2:46 PM, Tomasz Figa wrote: > > > > > Hi Vivek, > > > > > > > > > > On Thu, Aug 30, 2018 at 11:46 PM Vivek Gautam > > > > > <vivek.gautam@codeaurora.org> wrote: > > > > >> From: Sricharan R <sricharan@codeaurora.org> > > > > >> > > > > >> The smmu device probe/remove and add/remove master device callbacks > > > > >> gets called when the smmu is not linked to its master, that is without > > > > >> the context of the master device. So calling runtime apis in those places > > > > >> separately. > > > > >> Global locks are also initialized before enabling runtime pm as the > > > > >> runtime_resume() calls device_reset() which does tlb_sync_global() > > > > >> that ultimately requires locks to be initialized. > > > > >> > > > > >> Signed-off-by: Sricharan R <sricharan@codeaurora.org> > > > > >> [vivek: Cleanup pm runtime calls] > > > > >> Signed-off-by: Vivek Gautam <vivek.gautam@codeaurora.org> > > > > >> Reviewed-by: Tomasz Figa <tfiga@chromium.org> > > > > >> Tested-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> > > > > >> --- > > > > >> drivers/iommu/arm-smmu.c | 89 +++++++++++++++++++++++++++++++++++++++++++----- > > > > >> 1 file changed, 81 insertions(+), 8 deletions(-) > > > > > [snip] > > > > >> @@ -2215,10 +2281,17 @@ static int arm_smmu_device_remove(struct platform_device *pdev) > > > > >> if (!bitmap_empty(smmu->context_map, ARM_SMMU_MAX_CBS)) > > > > >> dev_err(&pdev->dev, "removing device with active domains!\n"); > > > > >> > > > > >> + arm_smmu_rpm_get(smmu); > > > > >> /* Turn the thing off */ > > > > >> writel(sCR0_CLIENTPD, ARM_SMMU_GR0_NS(smmu) + ARM_SMMU_GR0_sCR0); > > > > >> + arm_smmu_rpm_put(smmu); > > > > >> + > > > > >> + if (pm_runtime_enabled(smmu->dev)) > > > > >> + pm_runtime_force_suspend(smmu->dev); > > > > >> + else > > > > >> + clk_bulk_disable(smmu->num_clks, smmu->clks); > > > > >> > > > > >> - clk_bulk_disable_unprepare(smmu->num_clks, smmu->clks); > > > > >> + clk_bulk_unprepare(smmu->num_clks, smmu->clks); > > > > > Aren't we missing pm_runtime_disable() here? We'll have the enable > > > > > count unbalanced if the driver is removed and probed again. > > > > > > > > pm_runtime_force_suspend() does a pm_runtime_disable() also if i am not > > > > wrong. > > > > And, as mentioned in a previous thread [1], we were seeing a warning > > > > which we avoided > > > > by keeping force_suspend(). > > > > > > > > [1] https://lkml.org/lkml/2018/7/8/124 > > > > > > I see, thanks. I didn't realize that pm_runtime_force_suspend() > > > already disables runtime PM indeed. Sorry for the noise. > > > > Hi Tomasz, > > No problem. Thanks for looking back at it. > > > > Hi Robin, > > If you are fine with this series, then can you please consider giving > > Reviewed-by, so that we are certain that this series will go in the next merge > > window. > > Thanks > > Gentle ping. > You ack will be very helpful in letting Will pull this series for 4.20. > Thanks. I would really appreciate if you could provide your ack for this series. Or if there are any concerns, I am willing to address them. Thanks. Best regards Vivek > > -- > QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member > of Code Aurora Forum, hosted by The Linux Foundation -- QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by The Linux Foundation _______________________________________________ Freedreno mailing list Freedreno@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/freedreno
WARNING: multiple messages have this Message-ID (diff)
From: Vivek Gautam <vivek.gautam@codeaurora.org> To: Robin Murphy <robin.murphy@arm.com>, Will Deacon <will.deacon@arm.com> Cc: Mark Rutland <mark.rutland@arm.com>, "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" <devicetree@vger.kernel.org>, alex.williamson@redhat.com, Linux PM <linux-pm@vger.kernel.org>, sboyd@kernel.org, "Rafael J. Wysocki" <rjw@rjwysocki.net>, open list <linux-kernel@vger.kernel.org>, "list@263.net:IOMMU DRIVERS <iommu@lists.linux-foundation.org>, Joerg Roedel <joro@8bytes.org>," <iommu@lists.linux-foundation.org>, "robh+dt" <robh+dt@kernel.org>, linux-arm-msm <linux-arm-msm@vger.kernel.org>, freedreno <freedreno@lists.freedesktop.org>, Tomasz Figa <tfiga@chromium.org> Subject: Re: [PATCH v16 2/5] iommu/arm-smmu: Invoke pm_runtime during probe, add/remove device Date: Tue, 25 Sep 2018 11:26:04 +0530 [thread overview] Message-ID: <CAFp+6iFvhdSq7upbvsEWgMewhAaaRM91iw9p7qOFPYrUxis0Hg@mail.gmail.com> (raw) In-Reply-To: <CAFp+6iHnHj_PkPFBUSTdJTW57K51wLqSEw6VOMKxAVo7O+ms9g@mail.gmail.com> Hi Robin, Will, On Tue, Sep 18, 2018 at 8:41 AM Vivek Gautam <vivek.gautam@codeaurora.org> wrote: > > Hi Robin, > > On Fri, Sep 7, 2018 at 3:52 PM Vivek Gautam <vivek.gautam@codeaurora.org> wrote: > > > > On Fri, Sep 7, 2018 at 3:22 PM Tomasz Figa <tfiga@chromium.org> wrote: > > > > > > On Fri, Sep 7, 2018 at 6:38 PM Vivek Gautam <vivek.gautam@codeaurora.org> wrote: > > > > > > > > Hi Tomasz, > > > > > > > > > > > > On 9/7/2018 2:46 PM, Tomasz Figa wrote: > > > > > Hi Vivek, > > > > > > > > > > On Thu, Aug 30, 2018 at 11:46 PM Vivek Gautam > > > > > <vivek.gautam@codeaurora.org> wrote: > > > > >> From: Sricharan R <sricharan@codeaurora.org> > > > > >> > > > > >> The smmu device probe/remove and add/remove master device callbacks > > > > >> gets called when the smmu is not linked to its master, that is without > > > > >> the context of the master device. So calling runtime apis in those places > > > > >> separately. > > > > >> Global locks are also initialized before enabling runtime pm as the > > > > >> runtime_resume() calls device_reset() which does tlb_sync_global() > > > > >> that ultimately requires locks to be initialized. > > > > >> > > > > >> Signed-off-by: Sricharan R <sricharan@codeaurora.org> > > > > >> [vivek: Cleanup pm runtime calls] > > > > >> Signed-off-by: Vivek Gautam <vivek.gautam@codeaurora.org> > > > > >> Reviewed-by: Tomasz Figa <tfiga@chromium.org> > > > > >> Tested-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> > > > > >> --- > > > > >> drivers/iommu/arm-smmu.c | 89 +++++++++++++++++++++++++++++++++++++++++++----- > > > > >> 1 file changed, 81 insertions(+), 8 deletions(-) > > > > > [snip] > > > > >> @@ -2215,10 +2281,17 @@ static int arm_smmu_device_remove(struct platform_device *pdev) > > > > >> if (!bitmap_empty(smmu->context_map, ARM_SMMU_MAX_CBS)) > > > > >> dev_err(&pdev->dev, "removing device with active domains!\n"); > > > > >> > > > > >> + arm_smmu_rpm_get(smmu); > > > > >> /* Turn the thing off */ > > > > >> writel(sCR0_CLIENTPD, ARM_SMMU_GR0_NS(smmu) + ARM_SMMU_GR0_sCR0); > > > > >> + arm_smmu_rpm_put(smmu); > > > > >> + > > > > >> + if (pm_runtime_enabled(smmu->dev)) > > > > >> + pm_runtime_force_suspend(smmu->dev); > > > > >> + else > > > > >> + clk_bulk_disable(smmu->num_clks, smmu->clks); > > > > >> > > > > >> - clk_bulk_disable_unprepare(smmu->num_clks, smmu->clks); > > > > >> + clk_bulk_unprepare(smmu->num_clks, smmu->clks); > > > > > Aren't we missing pm_runtime_disable() here? We'll have the enable > > > > > count unbalanced if the driver is removed and probed again. > > > > > > > > pm_runtime_force_suspend() does a pm_runtime_disable() also if i am not > > > > wrong. > > > > And, as mentioned in a previous thread [1], we were seeing a warning > > > > which we avoided > > > > by keeping force_suspend(). > > > > > > > > [1] https://lkml.org/lkml/2018/7/8/124 > > > > > > I see, thanks. I didn't realize that pm_runtime_force_suspend() > > > already disables runtime PM indeed. Sorry for the noise. > > > > Hi Tomasz, > > No problem. Thanks for looking back at it. > > > > Hi Robin, > > If you are fine with this series, then can you please consider giving > > Reviewed-by, so that we are certain that this series will go in the next merge > > window. > > Thanks > > Gentle ping. > You ack will be very helpful in letting Will pull this series for 4.20. > Thanks. I would really appreciate if you could provide your ack for this series. Or if there are any concerns, I am willing to address them. Thanks. Best regards Vivek > > -- > QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member > of Code Aurora Forum, hosted by The Linux Foundation -- QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by The Linux Foundation
next prev parent reply other threads:[~2018-09-25 5:56 UTC|newest] Thread overview: 77+ messages / expand[flat|nested] mbox.gz Atom feed top 2018-08-30 14:45 [PATCH v16 0/5] iommu/arm-smmu: Add runtime pm/sleep support Vivek Gautam 2018-08-30 14:45 ` Vivek Gautam [not found] ` <20180830144541.17740-1-vivek.gautam-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org> 2018-08-30 14:45 ` [PATCH v16 1/5] iommu/arm-smmu: Add pm_runtime/sleep ops Vivek Gautam 2018-08-30 14:45 ` Vivek Gautam [not found] ` <20180830144541.17740-2-vivek.gautam-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org> 2018-09-26 15:27 ` Robin Murphy 2018-09-26 15:27 ` Robin Murphy [not found] ` <1a918f99-83b0-2f51-7634-126639a220de-5wv7dgnIgG8@public.gmane.org> 2018-09-27 8:31 ` Vivek Gautam 2018-09-27 8:31 ` Vivek Gautam 2018-09-28 11:59 ` Ulf Hansson 2018-10-01 5:49 ` Vivek Gautam 2018-10-01 5:49 ` Vivek Gautam [not found] ` <CAFp+6iHZysBmMZj+pZghPocEwDzU7KfR1gLQAQRBui+-gdiSTQ-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org> 2018-10-01 9:38 ` Ulf Hansson 2018-10-01 9:38 ` Ulf Hansson [not found] ` <CAPDyKFrCWaeDLbmbrRb23V_mRk8doBjM3u2X9tm0XNXm=-n5vA-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org> 2018-10-01 10:21 ` Vivek Gautam 2018-10-01 10:21 ` Vivek Gautam 2018-10-01 10:32 ` Vivek Gautam 2018-10-01 10:32 ` Vivek Gautam [not found] ` <CAFp+6iFJbQZ1MrNWD6g+GNp9TOMXuq0oDdzQ9XUMTmY67tNgWg-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org> 2018-10-01 12:02 ` Ulf Hansson 2018-10-01 12:02 ` Ulf Hansson 2018-08-30 14:45 ` [PATCH v16 2/5] iommu/arm-smmu: Invoke pm_runtime during probe, add/remove device Vivek Gautam 2018-08-30 14:45 ` Vivek Gautam [not found] ` <20180830144541.17740-3-vivek.gautam-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org> 2018-09-07 9:16 ` Tomasz Figa 2018-09-07 9:16 ` Tomasz Figa [not found] ` <CAAFQd5B7YR03Jm1upOg2nsaKOb1iDD7-WGo-qx7S8m-nounCvA-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org> 2018-09-07 9:38 ` Vivek Gautam 2018-09-07 9:38 ` Vivek Gautam 2018-09-07 9:52 ` Tomasz Figa 2018-09-07 9:52 ` Tomasz Figa [not found] ` <CAAFQd5DMDWEeBU=fg6arye3pXnrCqOA4tDtMSGutXk7vSz-EtQ-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org> 2018-09-07 10:22 ` Vivek Gautam 2018-09-07 10:22 ` Vivek Gautam [not found] ` <CAFp+6iE3+qn6-gpXEzxfoP5yPMARmUcJNn0AZk-kA2AreTLnng-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org> 2018-09-18 3:11 ` Vivek Gautam 2018-09-18 3:11 ` Vivek Gautam [not found] ` <CAFp+6iHnHj_PkPFBUSTdJTW57K51wLqSEw6VOMKxAVo7O+ms9g-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org> 2018-09-25 5:56 ` Vivek Gautam [this message] 2018-09-25 5:56 ` Vivek Gautam [not found] ` <CAFp+6iFvhdSq7upbvsEWgMewhAaaRM91iw9p7qOFPYrUxis0Hg-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org> 2018-09-25 18:55 ` Robin Murphy 2018-09-25 18:55 ` Robin Murphy [not found] ` <aedf3f32-68ae-566a-3735-ca4ec5c7559a-5wv7dgnIgG8@public.gmane.org> 2018-09-26 6:22 ` Vivek Gautam 2018-09-26 6:22 ` Vivek Gautam 2018-09-26 15:42 ` Robin Murphy 2018-09-26 15:42 ` Robin Murphy 2018-10-01 12:58 ` Will Deacon 2018-10-01 12:58 ` Will Deacon [not found] ` <20181001125854.GB31488-5wv7dgnIgG8@public.gmane.org> 2018-10-02 4:14 ` Vivek Gautam 2018-10-02 4:14 ` Vivek Gautam [not found] ` <CAFp+6iGkudBtZFfk4ST+k9OMRSGgU=pzVGC4QaSmPb+Xkdp3Xw-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org> 2018-10-02 5:28 ` Vivek Gautam 2018-10-02 5:28 ` Vivek Gautam [not found] ` <CAFp+6iFpm05Uu8HkYCC+O+gYwFwvxirc6=e6oOed+ZJk6QLDPw-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org> 2018-10-02 7:12 ` [PATCH v17 " Vivek Gautam 2018-10-02 7:12 ` Vivek Gautam 2018-10-02 7:12 ` Vivek Gautam 2018-08-30 14:45 ` [PATCH v16 3/5] iommu/arm-smmu: Add the device_link between masters and smmu Vivek Gautam 2018-08-30 14:45 ` Vivek Gautam [not found] ` <20180830144541.17740-4-vivek.gautam-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org> 2018-09-26 15:44 ` Robin Murphy 2018-09-26 15:44 ` Robin Murphy 2018-08-30 14:45 ` [PATCH v16 4/5] dt-bindings: arm-smmu: Add bindings for qcom, smmu-v2 Vivek Gautam 2018-08-30 14:45 ` [PATCH v16 4/5] dt-bindings: arm-smmu: Add bindings for qcom,smmu-v2 Vivek Gautam [not found] ` <20180830144541.17740-5-vivek.gautam-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org> 2018-09-06 3:52 ` [PATCH v16 4/5] dt-bindings: arm-smmu: Add bindings for qcom, smmu-v2 Vivek Gautam 2018-09-06 3:52 ` [PATCH v16 4/5] dt-bindings: arm-smmu: Add bindings for qcom,smmu-v2 Vivek Gautam 2018-09-10 18:02 ` Rob Herring 2018-09-10 18:02 ` Rob Herring 2018-09-11 8:34 ` [PATCH v16 4/5] dt-bindings: arm-smmu: Add bindings for qcom, smmu-v2 Vivek Gautam 2018-09-11 8:34 ` [PATCH v16 4/5] dt-bindings: arm-smmu: Add bindings for qcom,smmu-v2 Vivek Gautam 2018-09-26 15:46 ` [PATCH v16 4/5] dt-bindings: arm-smmu: Add bindings for qcom, smmu-v2 Robin Murphy 2018-09-26 15:46 ` [PATCH v16 4/5] dt-bindings: arm-smmu: Add bindings for qcom,smmu-v2 Robin Murphy 2018-10-01 12:18 ` [PATCH v16 4/5] dt-bindings: arm-smmu: Add bindings for qcom, smmu-v2 Will Deacon 2018-10-01 12:18 ` [PATCH v16 4/5] dt-bindings: arm-smmu: Add bindings for qcom,smmu-v2 Will Deacon 2018-10-01 17:36 ` Rob Herring [not found] ` <CAL_Jsq+dSGXCiWsjLt00wu=s-ZW8M1pkQqKFWboc54M8gHFTYg-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org> 2018-10-01 17:45 ` [PATCH v16 4/5] dt-bindings: arm-smmu: Add bindings for qcom, smmu-v2 Will Deacon 2018-10-01 17:45 ` [PATCH v16 4/5] dt-bindings: arm-smmu: Add bindings for qcom,smmu-v2 Will Deacon 2018-08-30 14:45 ` [PATCH v16 5/5] iommu/arm-smmu: Add support for qcom, smmu-v2 variant Vivek Gautam 2018-08-30 14:45 ` [PATCH v16 5/5] iommu/arm-smmu: Add support for qcom,smmu-v2 variant Vivek Gautam [not found] ` <20180830144541.17740-6-vivek.gautam-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org> 2018-09-26 15:59 ` [PATCH v16 5/5] iommu/arm-smmu: Add support for qcom, smmu-v2 variant Robin Murphy 2018-09-26 15:59 ` [PATCH v16 5/5] iommu/arm-smmu: Add support for qcom,smmu-v2 variant Robin Murphy 2018-09-27 6:55 ` Vivek Gautam 2018-09-27 6:55 ` Vivek Gautam 2018-09-28 13:57 ` [PATCH v16 0/5] iommu/arm-smmu: Add runtime pm/sleep support Will Deacon 2018-09-28 13:57 ` Will Deacon 2018-10-01 9:06 ` Vivek Gautam 2018-10-01 9:06 ` Vivek Gautam
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