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[109.252.193.103]) by smtp.googlemail.com with ESMTPSA id z18sm17325lft.57.2021.04.24.13.41.38 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Sat, 24 Apr 2021 13:41:38 -0700 (PDT) Subject: Re: [PATCH v1 2/2] iommu/tegra-smmu: Revert workaround that was needed for Nyan Big Chromebook From: Dmitry Osipenko To: Guillaume Tucker , Nicolin Chen , Thierry Reding Cc: Joerg Roedel , Jonathan Hunter , Krishna Reddy , Will Deacon , iommu@lists.linux-foundation.org, linux-tegra@vger.kernel.org, linux-kernel@vger.kernel.org References: <20210328233256.20494-1-digetx@gmail.com> <20210328233256.20494-2-digetx@gmail.com> <20210401085549.GA31146@Asurada-Nvidia> <50a7e4c7-0e72-534a-a317-366e455213c1@gmail.com> <724e683f-5317-cdf7-7351-fcfd42b7b607@gmail.com> <5ec2be61-a70e-e3b1-9267-414793c32a04@gmail.com> Message-ID: <4b1eb3d5-6489-6553-ba88-df485323e6e8@gmail.com> Date: Sat, 24 Apr 2021 23:41:37 +0300 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.8.1 MIME-Version: 1.0 In-Reply-To: <5ec2be61-a70e-e3b1-9267-414793c32a04@gmail.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-tegra@vger.kernel.org 24.04.2021 23:27, Dmitry Osipenko пишет: > 23.04.2021 18:23, Dmitry Osipenko пишет: >> 23.04.2021 18:01, Guillaume Tucker пишет: >>> On 02/04/2021 15:40, Dmitry Osipenko wrote: >>>> 01.04.2021 11:55, Nicolin Chen пишет: >>>>> On Mon, Mar 29, 2021 at 02:32:56AM +0300, Dmitry Osipenko wrote: >>>>>> The previous commit fixes problem where display client was attaching too >>>>>> early to IOMMU during kernel boot in a multi-platform kernel configuration >>>>>> which enables CONFIG_ARM_DMA_USE_IOMMU=y. The workaround that helped to >>>>>> defer the IOMMU attachment for Nyan Big Chromebook isn't needed anymore, >>>>>> revert it. >>>>> >>>>> Sorry for the late reply. I have been busy with downstream tasks. >>>>> >>>>> I will give them a try by the end of the week. Yet, probably it'd >>>>> be better to include Guillaume also as he has the Nyan platform. >>>>> >>>> >>>> Indeed, thanks. Although, I'm pretty sure that it's the same issue which >>>> I reproduced on Nexus 7. >>>> >>>> Guillaume, could you please give a test to these patches on Nyan Big? >>>> There should be no EMEM errors in the kernel log with this patches. >>>> >>>> https://patchwork.ozlabs.org/project/linux-tegra/list/?series=236215 >>> >>> So sorry for the very late reply. I have tried the patches but >>> hit some issues on linux-next, it's not reaching a login prompt >>> with next-20210422. So I then tried with next-20210419 which >>> does boot but shows the IOMMU error: >>> >>> <6>[ 2.995341] tegra-dc 54200000.dc: Adding to iommu group 1 >>> <4>[ 3.001070] Failed to attached device 54200000.dc to IOMMU_mapping >>> >>> https://lava.collabora.co.uk/scheduler/job/3570052#L1120 >>> >>> The branch I'm using with the patches applied can be found here: >>> >>> https://gitlab.collabora.com/gtucker/linux/-/commits/next-20210419-nyan-big-drm-read/ >>> >>> Hope this helps, let me know if you need anything else to be >>> tested. >> >> >> Hello Guillaume, >> >> The current linux-next doesn't boot on all ARM (AFAIK), the older >> next-20210413 works. The above message should be unrelated to the boot >> problem. It should be okay to ignore that message as it should be >> harmless in yours case. >> > > Although, the 20210419 should be good. > > Thierry, do you know what those SOR and Nouveau issues are about? > I don't see DRM driver being loaded at all and no errors related to it in the log. This means that likely some of the DRM sub-drivers is stuck in deferred probe. Guillaume, could you please show contents of /sys/kernel/debug/devices_deferred ? These messages also don't look good: tegra-xusb-padctl 7009f000.padctl: failed to setup XUSB ports: -22 tegra-xusb-padctl: probe of 7009f000.padctl failed with error -22 I don't have T124 and all these problems should be specific to the T124 platform. Somebody with a direct access to hardware should look into it. 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[109.252.193.103]) by smtp.googlemail.com with ESMTPSA id z18sm17325lft.57.2021.04.24.13.41.38 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Sat, 24 Apr 2021 13:41:38 -0700 (PDT) Subject: Re: [PATCH v1 2/2] iommu/tegra-smmu: Revert workaround that was needed for Nyan Big Chromebook From: Dmitry Osipenko To: Guillaume Tucker , Nicolin Chen , Thierry Reding References: <20210328233256.20494-1-digetx@gmail.com> <20210328233256.20494-2-digetx@gmail.com> <20210401085549.GA31146@Asurada-Nvidia> <50a7e4c7-0e72-534a-a317-366e455213c1@gmail.com> <724e683f-5317-cdf7-7351-fcfd42b7b607@gmail.com> <5ec2be61-a70e-e3b1-9267-414793c32a04@gmail.com> Message-ID: <4b1eb3d5-6489-6553-ba88-df485323e6e8@gmail.com> Date: Sat, 24 Apr 2021 23:41:37 +0300 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.8.1 MIME-Version: 1.0 In-Reply-To: <5ec2be61-a70e-e3b1-9267-414793c32a04@gmail.com> Content-Language: en-US Cc: linux-kernel@vger.kernel.org, iommu@lists.linux-foundation.org, Jonathan Hunter , linux-tegra@vger.kernel.org, Will Deacon X-BeenThere: iommu@lists.linux-foundation.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Development issues for Linux IOMMU support List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Errors-To: iommu-bounces@lists.linux-foundation.org Sender: "iommu" MjQuMDQuMjAyMSAyMzoyNywgRG1pdHJ5IE9zaXBlbmtvINC/0LjRiNC10YI6Cj4gMjMuMDQuMjAy MSAxODoyMywgRG1pdHJ5IE9zaXBlbmtvINC/0LjRiNC10YI6Cj4+IDIzLjA0LjIwMjEgMTg6MDEs IEd1aWxsYXVtZSBUdWNrZXIg0L/QuNGI0LXRgjoKPj4+IE9uIDAyLzA0LzIwMjEgMTU6NDAsIERt aXRyeSBPc2lwZW5rbyB3cm90ZToKPj4+PiAwMS4wNC4yMDIxIDExOjU1LCBOaWNvbGluIENoZW4g 0L/QuNGI0LXRgjoKPj4+Pj4gT24gTW9uLCBNYXIgMjksIDIwMjEgYXQgMDI6MzI6NTZBTSArMDMw MCwgRG1pdHJ5IE9zaXBlbmtvIHdyb3RlOgo+Pj4+Pj4gVGhlIHByZXZpb3VzIGNvbW1pdCBmaXhl cyBwcm9ibGVtIHdoZXJlIGRpc3BsYXkgY2xpZW50IHdhcyBhdHRhY2hpbmcgdG9vCj4+Pj4+PiBl YXJseSB0byBJT01NVSBkdXJpbmcga2VybmVsIGJvb3QgaW4gYSBtdWx0aS1wbGF0Zm9ybSBrZXJu ZWwgY29uZmlndXJhdGlvbgo+Pj4+Pj4gd2hpY2ggZW5hYmxlcyBDT05GSUdfQVJNX0RNQV9VU0Vf SU9NTVU9eS4gVGhlIHdvcmthcm91bmQgdGhhdCBoZWxwZWQgdG8KPj4+Pj4+IGRlZmVyIHRoZSBJ T01NVSBhdHRhY2htZW50IGZvciBOeWFuIEJpZyBDaHJvbWVib29rIGlzbid0IG5lZWRlZCBhbnlt b3JlLAo+Pj4+Pj4gcmV2ZXJ0IGl0Lgo+Pj4+Pgo+Pj4+PiBTb3JyeSBmb3IgdGhlIGxhdGUgcmVw bHkuIEkgaGF2ZSBiZWVuIGJ1c3kgd2l0aCBkb3duc3RyZWFtIHRhc2tzLgo+Pj4+Pgo+Pj4+PiBJ IHdpbGwgZ2l2ZSB0aGVtIGEgdHJ5IGJ5IHRoZSBlbmQgb2YgdGhlIHdlZWsuIFlldCwgcHJvYmFi bHkgaXQnZAo+Pj4+PiBiZSBiZXR0ZXIgdG8gaW5jbHVkZSBHdWlsbGF1bWUgYWxzbyBhcyBoZSBo YXMgdGhlIE55YW4gcGxhdGZvcm0uCj4+Pj4+Cj4+Pj4KPj4+PiBJbmRlZWQsIHRoYW5rcy4gQWx0 aG91Z2gsIEknbSBwcmV0dHkgc3VyZSB0aGF0IGl0J3MgdGhlIHNhbWUgaXNzdWUgd2hpY2gKPj4+ PiBJIHJlcHJvZHVjZWQgb24gTmV4dXMgNy4KPj4+Pgo+Pj4+IEd1aWxsYXVtZSwgY291bGQgeW91 IHBsZWFzZSBnaXZlIGEgdGVzdCB0byB0aGVzZSBwYXRjaGVzIG9uIE55YW4gQmlnPwo+Pj4+IFRo ZXJlIHNob3VsZCBiZSBubyBFTUVNIGVycm9ycyBpbiB0aGUga2VybmVsIGxvZyB3aXRoIHRoaXMg cGF0Y2hlcy4KPj4+Pgo+Pj4+IGh0dHBzOi8vcGF0Y2h3b3JrLm96bGFicy5vcmcvcHJvamVjdC9s aW51eC10ZWdyYS9saXN0Lz9zZXJpZXM9MjM2MjE1Cj4+Pgo+Pj4gU28gc29ycnkgZm9yIHRoZSB2 ZXJ5IGxhdGUgcmVwbHkuICBJIGhhdmUgdHJpZWQgdGhlIHBhdGNoZXMgYnV0Cj4+PiBoaXQgc29t ZSBpc3N1ZXMgb24gbGludXgtbmV4dCwgaXQncyBub3QgcmVhY2hpbmcgYSBsb2dpbiBwcm9tcHQK Pj4+IHdpdGggbmV4dC0yMDIxMDQyMi4gIFNvIEkgdGhlbiB0cmllZCB3aXRoIG5leHQtMjAyMTA0 MTkgd2hpY2gKPj4+IGRvZXMgYm9vdCBidXQgc2hvd3MgdGhlIElPTU1VIGVycm9yOgo+Pj4KPj4+ IDw2PlsgICAgMi45OTUzNDFdIHRlZ3JhLWRjIDU0MjAwMDAwLmRjOiBBZGRpbmcgdG8gaW9tbXUg Z3JvdXAgMQo+Pj4gPDQ+WyAgICAzLjAwMTA3MF0gRmFpbGVkIHRvIGF0dGFjaGVkIGRldmljZSA1 NDIwMDAwMC5kYyB0byBJT01NVV9tYXBwaW5nICAKPj4+Cj4+PiAgIGh0dHBzOi8vbGF2YS5jb2xs YWJvcmEuY28udWsvc2NoZWR1bGVyL2pvYi8zNTcwMDUyI0wxMTIwCj4+Pgo+Pj4gVGhlIGJyYW5j aCBJJ20gdXNpbmcgd2l0aCB0aGUgcGF0Y2hlcyBhcHBsaWVkIGNhbiBiZSBmb3VuZCBoZXJlOgo+ Pj4KPj4+ICAgaHR0cHM6Ly9naXRsYWIuY29sbGFib3JhLmNvbS9ndHVja2VyL2xpbnV4Ly0vY29t bWl0cy9uZXh0LTIwMjEwNDE5LW55YW4tYmlnLWRybS1yZWFkLwo+Pj4KPj4+IEhvcGUgdGhpcyBo ZWxwcywgbGV0IG1lIGtub3cgaWYgeW91IG5lZWQgYW55dGhpbmcgZWxzZSB0byBiZQo+Pj4gdGVz dGVkLgo+Pgo+Pgo+PiBIZWxsbyBHdWlsbGF1bWUsCj4+Cj4+IFRoZSBjdXJyZW50IGxpbnV4LW5l eHQgZG9lc24ndCBib290IG9uIGFsbCBBUk0gKEFGQUlLKSwgdGhlIG9sZGVyCj4+IG5leHQtMjAy MTA0MTMgd29ya3MuIFRoZSBhYm92ZSBtZXNzYWdlIHNob3VsZCBiZSB1bnJlbGF0ZWQgdG8gdGhl IGJvb3QKPj4gcHJvYmxlbS4gSXQgc2hvdWxkIGJlIG9rYXkgdG8gaWdub3JlIHRoYXQgbWVzc2Fn ZSBhcyBpdCBzaG91bGQgYmUKPj4gaGFybWxlc3MgaW4geW91cnMgY2FzZS4KPj4KPiAKPiBBbHRo b3VnaCwgdGhlIDIwMjEwNDE5IHNob3VsZCBiZSBnb29kLgo+IAo+IFRoaWVycnksIGRvIHlvdSBr bm93IHdoYXQgdGhvc2UgU09SIGFuZCBOb3V2ZWF1IGlzc3VlcyBhcmUgYWJvdXQ/Cj4gCgpJIGRv bid0IHNlZSBEUk0gZHJpdmVyIGJlaW5nIGxvYWRlZCBhdCBhbGwgYW5kIG5vIGVycm9ycyByZWxh dGVkIHRvIGl0CmluIHRoZSBsb2cuIFRoaXMgbWVhbnMgdGhhdCBsaWtlbHkgc29tZSBvZiB0aGUg RFJNIHN1Yi1kcml2ZXJzIGlzIHN0dWNrCmluIGRlZmVycmVkIHByb2JlLgoKR3VpbGxhdW1lLCBj b3VsZCB5b3UgcGxlYXNlIHNob3cgY29udGVudHMgb2YKL3N5cy9rZXJuZWwvZGVidWcvZGV2aWNl c19kZWZlcnJlZCA/CgpUaGVzZSBtZXNzYWdlcyBhbHNvIGRvbid0IGxvb2sgZ29vZDoKCnRlZ3Jh LXh1c2ItcGFkY3RsIDcwMDlmMDAwLnBhZGN0bDogZmFpbGVkIHRvIHNldHVwIFhVU0IgcG9ydHM6 IC0yMgp0ZWdyYS14dXNiLXBhZGN0bDogcHJvYmUgb2YgNzAwOWYwMDAucGFkY3RsIGZhaWxlZCB3 aXRoIGVycm9yIC0yMgoKSSBkb24ndCBoYXZlIFQxMjQgYW5kIGFsbCB0aGVzZSBwcm9ibGVtcyBz aG91bGQgYmUgc3BlY2lmaWMgdG8gdGhlIFQxMjQKcGxhdGZvcm0uIFNvbWVib2R5IHdpdGggYSBk aXJlY3QgYWNjZXNzIHRvIGhhcmR3YXJlIHNob3VsZCBsb29rIGludG8gaXQuCl9fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fCmlvbW11IG1haWxpbmcgbGlzdApp b21tdUBsaXN0cy5saW51eC1mb3VuZGF0aW9uLm9yZwpodHRwczovL2xpc3RzLmxpbnV4Zm91bmRh dGlvbi5vcmcvbWFpbG1hbi9saXN0aW5mby9pb21tdQ==