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Integrated GPUs almost always works with write-back caching(only scanout and external bos works in write-combine) but in platforms without LLC the coherency is broken if not explict asked to KMD. vkFlushMappedMemoryRanges and vkInvalidateMappedMemoryRanges() don't do any flushing or invalidate for memory allocated with VK_MEMORY_PROPERTY_HOST_COHERENT_BIT. So if an application asked for a memory coherent, the ANV_BO_ALLOC_SNOOPED flag needs to be set in alloc_flags and that will be passed to KMD backends to properly ask to KMD for coherent buffer. The other chunk here removes the assert(alloc_flags & ANV_BO_ALLOC_MAPPED), that is needed otherwise application can't ask for a coherent and mapped memory. Tried to find a reason for that assert in git history but did not found what was the reasoning of this assert. Signed-off-by: José Roberto de Souza <jose.souza@intel.com> Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com> Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/26099>
`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.