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Date: Tue, 12 May 2015 10:46:26 +0200
Message-ID: <CA+M3ks6fddVwvwiUSBkMccV7utVVuB=iBqGonURimavM=sSWUw@mail.gmail.com>
Subject: Re: [RFC] How implement Secure Data Path ?
From: Benjamin Gaignard <benjamin.gaignard@linaro.org>
To: One Thousand Gnomes <gnomes@lxorguk.ukuu.org.uk>
Cc: Daniel Vetter <daniel@ffwll.ch>, Thierry Reding <treding@nvidia.com>,
        "linux-media@vger.kernel.org" <linux-media@vger.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        "dri-devel@lists.freedesktop.org" <dri-devel@lists.freedesktop.org>,
        Hans Verkuil <hverkuil@xs4all.nl>,
        Laurent Pinchart <laurent.pinchart@ideasonboard.com>,
        Rob Clark <robdclark@gmail.com>, Dave Airlie <airlied@redhat.com>,
        Sumit Semwal <sumit.semwal@linaro.org>, Tom Gall <tom.gall@linaro.org>
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I think now I have an answer to my question.

I will back come in a couple of weeks with a generic dmabuf allocator.
The feature set of this should be:
- allow to have per device specificone  allocator
- ioctl for buffer allocation and exporting dmabuf file descriptor on /dev/foo
- generic API to be able to call buffer securing module which is
platform specific.
- ioctl and kernel API to set/get dmabuf secure status

Sumit had already done a draft of this kind of dmabuf allocator with
his cenalloc [1]
I think I will start from that.

Benjamin

[1] http://git.linaro.org/people/sumit.semwal/linux-3.x.git on
cenalloc_wip branch.
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