linux-kernel - Re: [PATCH 0/2] iommu/omap: Rework cache functionality with DMA Streaming API

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Date:   Wed, 09 Aug 2017 14:20:42 +0300
From:   Laurent Pinchart <laurent.pinchart@...asonboard.com>
To:     Josue Albarran <j-albarran@...com>
Cc:     Joerg Roedel <joro@...tes.org>, iommu@...ts.linux-foundation.org,
        linux-kernel@...r.kernel.org, Suman Anna <s-anna@...com>,
        linux-omap@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH 0/2] iommu/omap: Rework cache functionality with DMA Streaming API

Hi Josue,

Thank you for the patches.

On Friday 28 Jul 2017 15:49:12 Josue Albarran wrote:
> Hi Joerg,
> 
> This series adapts the OMAP IOMMU driver to use the DMA API to flush
> the page table/directory table entries from the CPU caches instead of
> the ARM assembly calls. The patches are baselined on 4.13-rc1.
> 
> Following is the patch summary:
>  1. Patch 1 disables the OMAP IOMMU fault interrupts instead of
>     disabling the MMU upon a fault, and resulted in recurring bus
>     errors during remoteproc recovery on OMAP4. The MMU fault itself
>     is triggered due to the missing PL310 L2 cache operations, and
>     this patch fixes the recurring bus errors.
>  2. The second patch makes the adaptation to the DMA API for flushing
>     the caches. This fixes the MMU fault triggering issues in the
>     first place on OMAP4.
> 
> I have tested these patches on DRA7, OMAP5, and OMAP4 platforms using
> both OMAP IOMMU unit tests and some out-of-tree patches for exercising
> the MMUs using the OMAP remoteproc driver.
> 
> Laurent,
> Appreciate it if you can check the OMAP3ISP functionality with these
> patches once.

I apologize for the delay, I had to resurrect my Beagleboard-xM, which 
involved updating and then debugging U-Boot.

Tested-by: Laurent Pinchart <laurent.pinchart@...asonboard.com>

-- 
Regards,

Laurent Pinchart