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Re: [PATCH 2/2] dma: add Qualcomm Technologies HIDMA channel driver

From Timur Tabi <timur@codeaurora.org>
Newsgroups linux.kernel
Subject Re: [PATCH 2/2] dma: add Qualcomm Technologies HIDMA channel driver
Date 2015-10-30 23:00 +0100
Message-ID <qppSi-2Fa-1@gated-at.bofh.it> (permalink)
References <qp8eK-oK-5@gated-at.bofh.it> <qp8eK-oK-3@gated-at.bofh.it> <qpf6y-4BH-35@gated-at.bofh.it> <qppIB-2BU-7@gated-at.bofh.it>
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On 10/30/2015 04:42 PM, Sinan Kaya wrote:
>>
>>     if (WARN_ON(!pdev->dev.dma_mask))
>>         return -ENXIO;
>>
>> The dma mask has to always be set by the platform code before probe()
>> is called. If it is not set, you are not allowed to perform DMA.
>
> I tested this on an ACPI platform BTW when I was working on the initial
> implementation.

PowerPC sets the mask to 32 bits by default:

http://lxr.free-electrons.com/ident?i=arch_setup_pdev_archdata

Should we do something similar in ARM64?  Today, we have to manually set 
the DMA mask in all drivers.

-- 
Qualcomm Innovation Center, Inc.
The Qualcomm Innovation Center, Inc. is a member of the
Code Aurora Forum, a Linux Foundation Collaborative Project.
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Thread

[PATCH 1/2] dma: add Qualcomm Technologies HIDMA management driver Sinan Kaya <okaya@codeaurora.org> - 2015-10-30 04:10 +0100
  Re: [PATCH 1/2] dma: add Qualcomm Technologies HIDMA management  driver kbuild test robot <lkp@intel.com> - 2015-10-30 05:40 +0100
  [PATCH] dma: fix platform_no_drv_owner.cocci warnings kbuild test robot <lkp@intel.com> - 2015-10-30 05:40 +0100
  Re: [PATCH 1/2] dma: add Qualcomm Technologies HIDMA management driver Arnd Bergmann <arnd@arndb.de> - 2015-10-30 10:40 +0100
    Re: [PATCH 1/2] dma: add Qualcomm Technologies HIDMA management  driver Sinan Kaya <okaya@codeaurora.org> - 2015-10-31 08:00 +0100
      Re: [PATCH 1/2] dma: add Qualcomm Technologies HIDMA management  driver Timur Tabi <timur@codeaurora.org> - 2015-10-31 14:00 +0100
      Re: [PATCH 1/2] dma: add Qualcomm Technologies HIDMA management  driver Timur Tabi <timur@codeaurora.org> - 2015-10-31 14:00 +0100
      Re: [PATCH 1/2] dma: add Qualcomm Technologies HIDMA management driver Arnd Bergmann <arnd@arndb.de> - 2015-11-02 22:40 +0100
        Re: [PATCH 1/2] dma: add Qualcomm Technologies HIDMA management  driver Sinan Kaya <okaya@codeaurora.org> - 2015-11-03 05:50 +0100
          Re: [PATCH 1/2] dma: add Qualcomm Technologies HIDMA management driver Arnd Bergmann <arnd@arndb.de> - 2015-11-03 13:50 +0100
            Re: [PATCH 1/2] dma: add Qualcomm Technologies HIDMA management  driver Timur Tabi <timur@codeaurora.org> - 2015-11-03 15:30 +0100
            Re: [PATCH 1/2] dma: add Qualcomm Technologies HIDMA management  driver Sinan Kaya <okaya@codeaurora.org> - 2015-11-04 02:10 +0100
  Re: [PATCH 2/2] dma: add Qualcomm Technologies HIDMA channel driver Arnd Bergmann <arnd@arndb.de> - 2015-10-30 11:30 +0100
    Re: [PATCH 2/2] dma: add Qualcomm Technologies HIDMA channel driver Sinan Kaya <okaya@codeaurora.org> - 2015-10-30 22:50 +0100
      Re: [PATCH 2/2] dma: add Qualcomm Technologies HIDMA channel driver Timur Tabi <timur@codeaurora.org> - 2015-10-30 23:00 +0100
        Re: [PATCH 2/2] dma: add Qualcomm Technologies HIDMA channel driver Arnd Bergmann <arnd@arndb.de> - 2015-10-30 23:50 +0100
      Re: [PATCH 2/2] dma: add Qualcomm Technologies HIDMA channel driver Timur Tabi <timur@codeaurora.org> - 2015-10-30 23:40 +0100
        Re: [PATCH 2/2] dma: add Qualcomm Technologies HIDMA channel driver Arnd Bergmann <arnd@arndb.de> - 2015-10-31 00:00 +0100
      Re: [PATCH 2/2] dma: add Qualcomm Technologies HIDMA channel driver Arnd Bergmann <arnd@arndb.de> - 2015-10-30 23:40 +0100
        Re: [PATCH 2/2] dma: add Qualcomm Technologies HIDMA channel driver Sinan Kaya <okaya@codeaurora.org> - 2015-10-31 03:00 +0100
        Re: [PATCH 2/2] dma: add Qualcomm Technologies HIDMA channel driver Sinan Kaya <okaya@codeaurora.org> - 2015-11-01 20:00 +0100
          Re: [PATCH 2/2] dma: add Qualcomm Technologies HIDMA channel driver Timur Tabi <timur@codeaurora.org> - 2015-11-01 21:30 +0100
            Re: [PATCH 2/2] dma: add Qualcomm Technologies HIDMA channel driver Sinan Kaya <okaya@codeaurora.org> - 2015-11-01 21:30 +0100
          Re: [PATCH 2/2] dma: add Qualcomm Technologies HIDMA channel driver Arnd Bergmann <arnd@arndb.de> - 2015-11-02 17:40 +0100
            Re: [PATCH 2/2] dma: add Qualcomm Technologies HIDMA channel driver Sinan Kaya <okaya@codeaurora.org> - 2015-11-02 20:30 +0100
              Re: [PATCH 2/2] dma: add Qualcomm Technologies HIDMA channel driver Arnd Bergmann <arnd@arndb.de> - 2015-11-02 22:00 +0100
                Re: [PATCH 2/2] dma: add Qualcomm Technologies HIDMA channel driver Sinan Kaya <okaya@codeaurora.org> - 2015-11-03 06:30 +0100
                Re: [PATCH 2/2] dma: add Qualcomm Technologies HIDMA channel driver Arnd Bergmann <arnd@arndb.de> - 2015-11-03 11:50 +0100
                Re: [PATCH 2/2] dma: add Qualcomm Technologies HIDMA channel driver Sinan Kaya <okaya@codeaurora.org> - 2015-11-03 22:10 +0100
                Re: [PATCH 2/2] dma: add Qualcomm Technologies HIDMA channel driver Arnd Bergmann <arnd@arndb.de> - 2015-11-03 22:20 +0100
  Re: [PATCH 2/2] dma: add Qualcomm Technologies HIDMA channel driver Mark Rutland <mark.rutland@arm.com> - 2015-10-30 16:00 +0100
    Re: [PATCH 2/2] dma: add Qualcomm Technologies HIDMA channel driver Sinan Kaya <okaya@codeaurora.org> - 2015-10-31 05:30 +0100
  Re: [PATCH 1/2] dma: add Qualcomm Technologies HIDMA management  driver Mark Rutland <mark.rutland@arm.com> - 2015-10-30 16:10 +0100
    Re: [PATCH 1/2] dma: add Qualcomm Technologies HIDMA management driver Andy Shevchenko <andy.shevchenko@gmail.com> - 2015-10-30 19:10 +0100
      Re: [PATCH 1/2] dma: add Qualcomm Technologies HIDMA management  driver Sinan Kaya <okaya@codeaurora.org> - 2015-10-30 19:10 +0100
        Re: [PATCH 1/2] dma: add Qualcomm Technologies HIDMA management  driver Mark Rutland <mark.rutland@arm.com> - 2015-10-30 19:20 +0100
        Re: [PATCH 1/2] dma: add Qualcomm Technologies HIDMA management driver Andy Shevchenko <andy.shevchenko@gmail.com> - 2015-10-30 19:20 +0100
          Re: [PATCH 1/2] dma: add Qualcomm Technologies HIDMA management  driver Mark Rutland <mark.rutland@arm.com> - 2015-10-30 19:30 +0100
            Re: [PATCH 1/2] dma: add Qualcomm Technologies HIDMA management driver Andy Shevchenko <andy.shevchenko@gmail.com> - 2015-10-30 19:50 +0100
              Re: [PATCH 1/2] dma: add Qualcomm Technologies HIDMA management  driver Sinan Kaya <okaya@codeaurora.org> - 2015-10-30 19:50 +0100
                Re: [PATCH 1/2] dma: add Qualcomm Technologies HIDMA management  driver Mark Rutland <mark.rutland@arm.com> - 2015-10-30 20:10 +0100
                Re: [PATCH 1/2] dma: add Qualcomm Technologies HIDMA management  driver Al Stone <al.stone@linaro.org> - 2015-10-30 21:10 +0100
                Re: [PATCH 1/2] dma: add Qualcomm Technologies HIDMA management  driver Mark Rutland <mark.rutland@arm.com> - 2015-10-30 21:20 +0100
                Re: [PATCH 1/2] dma: add Qualcomm Technologies HIDMA management driver Andy Shevchenko <andy.shevchenko@gmail.com> - 2015-10-30 21:20 +0100
                Re: [PATCH 1/2] dma: add Qualcomm Technologies HIDMA management driver Jon Masters <jcm@redhat.com> - 2015-10-31 04:40 +0100
                Re: [PATCH 1/2] dma: add Qualcomm Technologies HIDMA management  driver Sinan Kaya <okaya@codeaurora.org> - 2015-10-31 18:40 +0100
            Re: [PATCH 1/2] dma: add Qualcomm Technologies HIDMA management  driver Sinan Kaya <okaya@codeaurora.org> - 2015-10-30 20:40 +0100
    Re: [PATCH 1/2] dma: add Qualcomm Technologies HIDMA management  driver Sinan Kaya <okaya@codeaurora.org> - 2015-10-31 18:20 +0100

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