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11dce2ac81
The last V3D_CLE_READAHEAD bytes of the CLE buffer are unusable because
using them would prefetch the next readahead bytes of the CL that would
be outside the allocated BO. To guarantee that we can chain a BO to the
current CL we always reserve space for the BRANCH packet.
Not taking this into account has been generating kernel dmesg errors like
"MMU error from client CLE".
As V3D_CLE_READAHEAD is different from RPi4 (256 bytes) to RPi5 (1024 bytes).
So we needed to rename v3d_cl.c to v3dX_cl.c to have different objects per
V3D_VERSION.
Extra assertions have been included to validate that we don't write
packets over the usable size of the CL silently.
v2: - Remove spurious blank line (Iago Toral)
- Do not declare unusable the space needed for the BRANCH packet,
and take it into account for all reservations.
v3: - Handle BRANCH packet reserve only when CLE BO allocation is done.
v4: - Assert on BO size updates that we are within the BO size.
(Iago Toral)
Reviewed-by: Iago Toral Quiroga <itoral@igalia.com>
cc: mesa-stable
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/29023>
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`Mesa <https://mesa3d.org>`_ - The 3D Graphics Library ====================================================== Source ------ This repository lives at https://gitlab.freedesktop.org/mesa/mesa. Other repositories are likely forks, and code found there is not supported. Build & install --------------- You can find more information in our documentation (`docs/install.rst <https://docs.mesa3d.org/install.html>`_), but the recommended way is to use Meson (`docs/meson.rst <https://docs.mesa3d.org/meson.html>`_): .. code-block:: sh $ mkdir build $ cd build $ meson .. $ sudo ninja install Support ------- Many Mesa devs hang on IRC; if you're not sure which channel is appropriate, you should ask your question on `OFTC's #dri-devel <irc://irc.oftc.net/dri-devel>`_, someone will redirect you if necessary. Remember that not everyone is in the same timezone as you, so it might take a while before someone qualified sees your question. To figure out who you're talking to, or which nick to ping for your question, check out `Who's Who on IRC <https://dri.freedesktop.org/wiki/WhosWho/>`_. The next best option is to ask your question in an email to the mailing lists: `mesa-dev\@lists.freedesktop.org <https://lists.freedesktop.org/mailman/listinfo/mesa-dev>`_ Bug reports ----------- If you think something isn't working properly, please file a bug report (`docs/bugs.rst <https://docs.mesa3d.org/bugs.html>`_). Contributing ------------ Contributions are welcome, and step-by-step instructions can be found in our documentation (`docs/submittingpatches.rst <https://docs.mesa3d.org/submittingpatches.html>`_). Note that Mesa uses gitlab for patches submission, review and discussions.