linux-kernel - Re: [PATCH] dma-pool: Do not allocate pool memory from CMA

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Message-ID: <CAMi1Hd0MG-JBADz9cRcg+MgB_1DmCJ3rj4dYUco=UXUQhL5UQw@mail.gmail.com>
Date:   Fri, 31 Jul 2020 12:49:51 +0530
From:   Amit Pundir <amit.pundir@...aro.org>
To:     Nathan Chancellor <natechancellor@...il.com>
Cc:     Christoph Hellwig <hch@....de>,
        Nicolas Saenz Julienne <nsaenzjulienne@...e.de>,
        Marek Szyprowski <m.szyprowski@...sung.com>,
        Robin Murphy <robin.murphy@....com>,
        David Rientjes <rientjes@...gle.com>,
        linux-rpi-kernel@...ts.infradead.org, jeremy.linton@....com,
        iommu@...ts.linux-foundation.org,
        lkml <linux-kernel@...r.kernel.org>,
        John Stultz <john.stultz@...aro.org>,
        Sumit Semwal <sumit.semwal@...aro.org>
Subject: Re: [PATCH] dma-pool: Do not allocate pool memory from CMA

On Fri, 31 Jul 2020 at 06:40, Nathan Chancellor
<natechancellor@...il.com> wrote:
>
> On Tue, Jul 28, 2020 at 12:09:18PM +0200, Christoph Hellwig wrote:
> > Ok, I found a slight bug that wasn't intended.  I wanted to make sure
> > we can always fall back to a lower pool, but got that wrong.  Should be
> > fixed in the next version.
>
> Hi Christoph and Nicolas,
>
> Did a version of that series ever get send out? I am coming into the
> conversation late but I am running into an issue with the Raspberry Pi 4
> not booting on linux-next, which appears to be due to this patch now in
> mainline as commit d9765e41d8e9 ("dma-pool: do not allocate pool memory
> from CMA") combined with
> https://lore.kernel.org/lkml/20200725014529.1143208-2-jiaxun.yang@flygoat.com/
> in -next:
>
> [    1.423163] raspberrypi-firmware soc:firmware: Request 0x00000001 returned status 0x00000000
> [    1.431883] raspberrypi-firmware soc:firmware: Request 0x00030046 returned status 0x00000000
> [    1.443888] raspberrypi-firmware soc:firmware: Request 0x00030043 returned status 0x00000000
> [    1.452527] raspberrypi-exp-gpio soc:firmware:gpio: Failed to get GPIO 0 config (-22 80)
> [    1.460836] raspberrypi-firmware soc:firmware: Request 0x00030043 returned status 0x00000000
> [    1.469445] raspberrypi-exp-gpio soc:firmware:gpio: Failed to get GPIO 1 config (-22 81)
> [    1.477735] raspberrypi-firmware soc:firmware: Request 0x00030043 returned status 0x00000000
> [    1.486350] raspberrypi-exp-gpio soc:firmware:gpio: Failed to get GPIO 2 config (-22 82)
> [    1.494639] raspberrypi-firmware soc:firmware: Request 0x00030043 returned status 0x00000000
> [    1.503246] raspberrypi-exp-gpio soc:firmware:gpio: Failed to get GPIO 3 config (-22 83)
> [    1.511529] raspberrypi-firmware soc:firmware: Request 0x00030043 returned status 0x00000000
> [    1.520131] raspberrypi-exp-gpio soc:firmware:gpio: Failed to get GPIO 4 config (-22 84)
> [    1.528414] raspberrypi-firmware soc:firmware: Request 0x00030043 returned status 0x00000000
> [    1.537017] raspberrypi-exp-gpio soc:firmware:gpio: Failed to get GPIO 5 config (-22 85)
> [    1.545299] raspberrypi-firmware soc:firmware: Request 0x00030043 returned status 0x00000000
> [    1.553903] raspberrypi-exp-gpio soc:firmware:gpio: Failed to get GPIO 6 config (-22 86)
> [    1.562184] raspberrypi-firmware soc:firmware: Request 0x00030043 returned status 0x00000000
> [    1.570787] raspberrypi-exp-gpio soc:firmware:gpio: Failed to get GPIO 7 config (-22 87)
> [    1.579897] raspberrypi-firmware soc:firmware: Request 0x00030030 returned status 0x00000000
> [    1.589419] raspberrypi-firmware soc:firmware: Request 0x00028001 returned status 0x00000000
> [    1.599391] raspberrypi-firmware soc:firmware: Request 0x00030043 returned status 0x00000000
> [    1.608018] raspberrypi-exp-gpio soc:firmware:gpio: Failed to get GPIO 1 config (-22 81)
> [    1.616313] raspberrypi-firmware soc:firmware: Request 0x00030043 returned status 0x00000000
> [    1.624932] raspberrypi-exp-gpio soc:firmware:gpio: Failed to get GPIO 1 config (-22 81)
> [    1.633195] pwrseq_simple: probe of wifi-pwrseq failed with error -22
> [    1.643904] raspberrypi-firmware soc:firmware: Request 0x00030043 returned status 0x00000000
> [    1.652544] raspberrypi-exp-gpio soc:firmware:gpio: Failed to get GPIO 2 config (-22 82)
> [    1.660839] raspberrypi-firmware soc:firmware: Request 0x00030041 returned status 0x00000000
> [    1.669446] raspberrypi-exp-gpio soc:firmware:gpio: Failed to get GPIO 2 state (-22 82)
> [    1.677727] leds-gpio: probe of leds failed with error -22
> [    1.683735] raspberrypi-firmware soc:firmware: Request 0x00030043 returned status 0x00000000
> [    1.692346] raspberrypi-exp-gpio soc:firmware:gpio: Failed to get GPIO 6 config (-22 86)
> [    1.700636] raspberrypi-firmware soc:firmware: Request 0x00030043 returned status 0x00000000
> [    1.709240] raspberrypi-exp-gpio soc:firmware:gpio: Failed to get GPIO 6 config (-22 86)
> [    1.717496] reg-fixed-voltage: probe of sd_vcc_reg failed with error -22
> [    1.725546] raspberrypi-firmware soc:firmware: Request 0x00030043 returned status 0x00000000
> [    1.734176] raspberrypi-exp-gpio soc:firmware:gpio: Failed to get GPIO 4 config (-22 84)
> [    1.742465] raspberrypi-firmware soc:firmware: Request 0x00030043 returned status 0x00000000
> [    1.751072] raspberrypi-exp-gpio soc:firmware:gpio: Failed to get GPIO 4 config (-22 84)
> [    1.759332] gpio-regulator: probe of sd_io_1v8_reg failed with error -22
> [    1.768042] raspberrypi-firmware soc:firmware: Request 0x00028001 returned status 0x00000000
> [    1.780871] ALSA device list:
> [    1.783960]   No soundcards found.
> [    1.787633] Waiting for root device PARTUUID=45a8dd8a-02...
>
> I am unsure if it is related to the issue that Amit is having or
> if that makes sense at all but I can reliably reproduce it.
>
> v5.8-rc1: OK
> v5.8-rc1 + d9765e41d8e9e: OK
> v5.8-rc1 + "of_address: Add bus type match for pci ranges parser": OK
> v5.8-rc1 + both: BROKEN
>
> I wanted to test the series to see if this fixes anything. If you would
> prefer a different thread for this or further information, please let
> me know.

Hi Nathan,

Here is the patch series:
https://lists.linuxfoundation.org/pipermail/iommu/2020-July/047008.html
https://lists.linuxfoundation.org/pipermail/iommu/2020-July/047010.html

I hope it works for you, it didn't work for me. More details in this
thread here:
https://lists.linuxfoundation.org/pipermail/iommu/2020-July/047009.html

Regards,
Amit Pundir

>
> Cheers,
> Nathan