linux-kernel - Re: [PATCH RFC 2/5] ARM: introduce arm_dma

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Date:   Tue, 15 Oct 2019 03:04:30 -0700
From:   Christoph Hellwig <hch@...radead.org>
To:     Nicolas Saenz Julienne <nsaenzjulienne@...e.de>
Cc:     Robin Murphy <robin.murphy@....com>,
        linux-arm-kernel@...ts.infradead.org,
        bcm-kernel-feedback-list@...adcom.com,
        linux-rpi-kernel@...ts.infradead.org,
        iommu@...ts.linux-foundation.org, linux-kernel@...r.kernel.org,
        hch@...radead.org, mbrugger@...e.com, f.fainelli@...il.com,
        wahrenst@....net, Russell King <linux@...linux.org.uk>
Subject: Re: [PATCH RFC 2/5] ARM: introduce arm_dma_direct

I think we just need to byte the bullet and move over arm to dma-direct
entirely.  This needs a careful audit of what differs, but the biggest
item is that we need to ensure dmabounce keeps working (or is replaced
with swiotlb in a suitable way, but that might be a lot more work).