linux-kernel - [PATCH v2 0/2] drm/panfrost: Fix UAPI for C++/BSD compatibility

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Message-Id: <20221017104602.142992-1-steven.price@arm.com>
Date:   Mon, 17 Oct 2022 11:46:00 +0100
From:   Steven Price <steven.price@....com>
To:     Alyssa Rosenzweig <alyssa.rosenzweig@...labora.com>,
        Adrián Larumbe <adrian.larumbe@...labora.com>
Cc:     Steven Price <steven.price@....com>, Rob Herring <robh@...nel.org>,
        Tomeu Vizoso <tomeu.vizoso@...labora.com>,
        dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
        Robin Murphy <robin.murphy@....com>
Subject: [PATCH v2 0/2] drm/panfrost: Fix UAPI for C++/BSD compatibility

The Panfrost DRM interface to user space is uesd in Mesa for targets
other than C/Linux. Specifically the header file needs to compile in C++
code and for FreeBSD which shares the same UABI.

The first patch fixes the C++ compilation issue by removing the
(unnecessary) type name from internal structs which is invalid in C++.

The second patch technically changes the UABI by changing the header
values in the dump format to be native endian rather than fixed
little-endian. Since (a) there are no known big-endian Mali systems, and
(b) this has only appeared in -rc1, this shouldn't break user space.
Tools can use the 'magic' field to identify the endianness of the dump
if they want to support big-endian.

This is effectively a 'v2' of Adrián's series here [1].

[1] https://lore.kernel.org/r/20220920211545.1017355-1-adrian.larumbe%40collabora.com

Steven Price (2):
  drm/panfrost: Remove type name from internal structs
  drm/panfrost: replace endian-specific types with native ones

 drivers/gpu/drm/panfrost/panfrost_dump.c | 36 ++++++++++++------------
 include/uapi/drm/panfrost_drm.h          | 36 +++++++++++++-----------
 2 files changed, 38 insertions(+), 34 deletions(-)

-- 
2.34.1