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99a970c5cd
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 or
RETURN_FROM_SUB_LIST packets.
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 v3dv_cl.c to v3dvX_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: - Do not declare unusable the space needed for the BRANCH packet,
but take it into account for all space reservations.
v3: - Squash here ("v3dv: Secondary CL needs also to handle CLE readahead")
- Remove spureous parenthesis (Iago Toral)
- Refactor to avoid checking for needs_return_from_sub_list inside
cl_alloc_bo adding unusable_space as new parameter.
v4: - Improved logic for chaining BOs moving it to cl_alloc_bo using
a new enum v3dv_cl_chain_type to identify the different kinds
of BO chaining. Now we increase the size of the BO just before
submitting the BRACH/RETURN_FROM_SUB_LIST packages.
v5: - Assert on BO size updates that we are within the BO size.
(Iago Toral)
v6: - Remove changes at cmd_buffer_end_render_pass_secondary as we
assumed that cl->bo was already allocated when ending the
secondary CL, but it can be NULL. And this was already handle
by current code.
Reviewed-by: Iago Toral Quiroga <itoral@igalia.com>
cc: mesa-stable
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/29023>
(cherry picked from commit 26c8a5cd72108f078dc7c064d281412adab20710)
`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://mesa3d.org/install.html>`_), but the recommended way is to use Meson (`docs/meson.rst <https://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://mesa3d.org/bugs.html>`_). Contributing ------------ Contributions are welcome, and step-by-step instructions can be found in our documentation (`docs/submittingpatches.rst <https://mesa3d.org/submittingpatches.html>`_). Note that Mesa uses gitlab for patches submission, review and discussions.