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

Laurent Pinchart
2017-08-09T11:20:42Z

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@ideasonboard.com>

--
Regards,

Laurent Pinchart