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Iago Toral Quiroga 44fa8304d4 v3dv: add a refcount mechanism to BOs
Until now we have lived without a refcount mechanism in the driver
because in Vulkan the user is responsible for handling the life
span of memory allocations for all Vulkan objects, however,
imported BOs are tricky because the kernel doesn't refcount
so user-space needs to make sure that:

1. When importing a BO into the same device used to create it
   (self-importing) it does not double free the same BO.
2. Frees imported BOs that were not allocated through the same
   device.

Our initial implementation always freed BOs when requested,
so we handled 2) correctly but not 1) and we would double-free
self-imported BOs. We tried to fix that in commit d809d9f3
but that broke 2) and we started to leak BOs for some imports.

This fixes the problem for good by adding refcounts to BOs
so that self-imported BOs have a refcnt > 1 and are only freed
when all references are freed.

Closes: https://gitlab.freedesktop.org/mesa/mesa/-/issues/5769
Tested-by: Roman Stratiienko <r.stratiienko@gmail.com>
Reviewed-by: Juan A. Suarez <jasuarez@igalia.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/14392>
2022-01-05 12:22:45 +00:00
.gitlab/issue_templates issue_templates/Bug Report: Rename master branch to main 2021-05-05 12:20:11 -07:00
.gitlab-ci CI: Trigger Windows build on softpipe changes 2021-12-27 12:26:02 -08:00
android gallium/swr: Remove common code and build options 2021-12-06 23:37:50 +00:00
bin vulkan/include: import the video codec headers. 2021-11-09 04:33:06 +00:00
build-support configure: commit test files 2017-10-16 16:32:43 -07:00
docs gallium: Delete PIPE_CAP_TGSI_ANY_REG_AS_ADDRESS 2022-01-04 23:05:41 +00:00
include include/pci_ids: Move PCI ids supported by both i965 and iris to iris 2021-12-03 23:53:06 +00:00
src v3dv: add a refcount mechanism to BOs 2022-01-05 12:22:45 +00:00
subprojects meson: Update libelf wrap for Windows 2021-11-12 09:46:10 +00:00
.dir-locals.el dir-locals.el: Adds White Space support 2016-11-14 19:17:49 +02:00
.editorconfig editorconfig: Use 3-space tabs for .rst 2021-06-22 17:37:55 +00:00
.gitignore intel/tools: Add unit tests for assembler 2019-05-07 14:33:48 -07:00
.gitlab-ci.yml ci: debian-clang: drop -Wno-error=absolute-value 2022-01-03 20:20:37 +00:00
.mailmap .mailmap: Simplify my name 2021-11-03 20:48:43 +00:00
.travis.yml travis: Download XQuartz from GitHub. 2021-05-29 10:25:16 +00:00
CODEOWNERS CODEOWNERS: remove ownership of deleted code 2021-12-07 22:54:27 +00:00
meson.build meson: Bump libdrm_amdgpu version req to 2.4.109. 2021-12-31 15:14:18 +00:00
meson_options.txt gallium/swr: Remove common code and build options 2021-12-06 23:37:50 +00:00
README.rst docs: promote #dri-devel on oftc over freenode 2021-05-24 09:21:48 +00:00
VERSION VERSION: bump to 22.0 2021-10-13 20:52:19 +01:00

`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.