The dumb buffer backing the renderonly_scanout is only destroyed if the
refcount reaches zero. If a driver does not correctly initialize the
refcount, the refcount may be negative and the buffer will never be
freed.
Add an assert to ensure that drivers correctly initialize the refcount.
Signed-off-by: Michael Tretter <m.tretter@pengutronix.de>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/23743>
If an error occured, make sure we reset the scanout object before
leaving, otherwise the next user of this handle will hit the
refcnt == 0 assert.
Fixes: ad4d7ca833 ("kmsro: Fix renderonly_scanout BO aliasing")
Cc: mesa-stable
Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>
Reviewed-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/23746>
this is a separate patch as it's won't affect the code style
Signed-off-by: Yonggang Luo <luoyonggang@gmail.com>
Acked-by: David Heidelberg <david.heidelberg@collabora.com>
Acked-by: Marek Olšák <marek.olsak@amd.com>
Acked-by: Erik Faye-Lund <erik.faye-lund@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/23577>
Signed-off-by: Yonggang Luo <luoyonggang@gmail.com>
Acked-by: David Heidelberg <david.heidelberg@collabora.com>
Acked-by: Marek Olšák <marek.olsak@amd.com>
Acked-by: Erik Faye-Lund <erik.faye-lund@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/23577>
BOs can only have one handle. If renderonly_create_gpu_import_for_resource
ends up importing a BO that was already mapped for scanout, it will get
the same handle. This leaves us with two renderonly_scanout objects for
one handle, and the first one to be destroyed will free it.
Import the BO map tracking logic from asahi, to avoid aliasing
renderonly_scanout objects. Each actual BO now is only represented by a
single object instance, which is reference counted.
Fixes KWin full-screen PipeWire capture breaking scanout entirely.
Reviewed-by: Lucas Stach <l.stach@pengutronix.de>
Reviewed-by: Christian Gmeiner <christian.gmeiner@gmail.com>
Signed-off-by: Asahi Lina <lina@asahilina.net>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/20397>
There are a number of drivers which do a trial-and-error import
of buffers into the KMS side via renderonly. Some of those imports
are expected to fail, so we should not print a error message in
this case. All callers do proper error handling themselves.
Cc: mesa-stable
Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Reviewed-by: Simon Ser <contact@emersion.fr>
Reviewed-by: Christian Gmeiner <christian.gmeiner@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/12018>
The renderonly object is something the winsys creates, so the pipe
driver has no business in memcpying or freeing it. Move those bits
to the winsys.
Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Reviewed-by: Guido Günther <agx@sigxcpu.org>
Reviewed-by: Eric Anholt <eric@anholt.net>
Reviewed-by: Christian Gmeiner <christian.gmeiner@gmail.com>
Reviewed-by: Alyssa Rosenzweig <alyssa@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/6983>
Most of these will never actually be compiled by windows, but in the
interest of being able to make using struct foo = {}; an error and
avoiding breaking windows removing a handful of safe uses seems like a
good trade off.
Reviewed-by: Kristian H. Kristensen <hoegsberg@google.com>
Acked-by: Eric Engestrom <eric.engestrom@intel.com>
To make PIPE_FORMATs usable from non-gallium parts of Mesa, I want to
move their helpers out of gallium. Since u_format used
util_copy_rect(), I moved that in there, too.
I've put it in a separate directory in util/ because it's a big chunk
of related code, and it's not clear to me whether we might want it as
a separate library from libmesa_util at some point.
Closes: #1905
Acked-by: Marek Olšák <marek.olsak@amd.com>
Reviewed-by: Kristian H. Kristensen <hoegsberg@google.com>
Reviewed-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
This just renames this as we want to add an shm handle which
isn't really drm related.
Originally by: Marc-André Lureau <marcandre.lureau@gmail.com>
(airlied: I used this sed script instead)
This was generated with:
git grep -l 'DRM_API_' | xargs sed -i 's/DRM_API_/WINSYS_/g'
Reviewed-by: Marek Olšák <marek.olsak@amd.com>
Take into account the resource format, instead of applying a hardcoded
32bpp. This not only over-allocates 16bpp formats, but also results in
a wrong stride being filled into the handle.
Fixes: 848b49b288 ("gallium: add renderonly library")
CC: <mesa-stable@lists.freedesktop.org>
Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Reviewed-by: Philipp Zabel <p.zabel@pengutronix.de>
Reviewed-by: Daniel Stone <daniels@collabora.com>
The current way of importing the resource from renderonly after allocation
is opaque and is taking away control from the driver, which it needs in
order to implement more advanced scenarios than the simple linear scanout
with matching stride alignments.
Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Reviewed-by: Christian Gmeiner <christian.gmeiner@gmail.com>
Acked-by: Daniel Stone <daniels@collabora.com>
Note that for requests for Prime FDs or flink names, we return handles to
the etanviv BO, not the scanout BO. This is at least better than previous
behavior of returning GEM handles for a request for an FD or flink name.
And add an assert that renderonly_get_handle is only used for getting the
GEM handle.
Signed-off-by: Eric Anholt <eric@anholt.net>
Reviewed-by: Christian Gmeiner <christian.gmeiner@gmail.com>
vc4 was rejecting renderonly's import, because the offset field was
nonzero.
Fixes: 848b49b288 ("gallium: add renderonly library")
Cc: mesa-stable@lists.freedesktop.org
Signed-off-by: Eric Anholt <eric@anholt.net>
Reviewed-by: Christian Gmeiner <christian.gmeiner@gmail.com>
To restart interrupted system calls, use drmIoctl.
Fixes: 848b49b288 ("gallium: add renderonly library")
CC: <mesa-stable@lists.freedesktop.org>
Suggested-by: Emil Velikov <emil.l.velikov@gmail.com>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Reviewed-by: Eric Engestrom <eric.engestrom@imgtec.com>
Reviewed-by: Christian Gmeiner <christian.gmeiner@gmail.com>
The renderonly_scanout holds a reference on its prime pipe resource,
which should be released when it is destroyed. If it was created by
renderonly_create_kms_dumb_buffer_for_resource, the dumb BO also has
to be destroyed.
Fixes: 848b49b288 ("gallium: add renderonly library")
CC: <mesa-stable@lists.freedesktop.org>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Reviewed-by: Emil Velikov <emil.l.velikov@gmail.com>
Reviewed-by: Christian Gmeiner <christian.gmeiner@gmail.com>
prime_fd is only used to transfer the scanout buffer to the GPU inside
renderonly_create_kms_dumb_buffer_for_resource. It should be closed
immediately to avoid leaking the DMA-BUF file handle.
Fixes: 848b49b288 ("gallium: add renderonly library")
CC: <mesa-stable@lists.freedesktop.org>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Reviewed-by: Emil Velikov <emil.l.velikov@gmail.com>
Reviewed-by: Christian Gmeiner <christian.gmeiner@gmail.com>
This a very lightweight library to add basic support for renderonly
GPUs. A kms gallium driver must specify how a renderonly_scanout
objects gets created. Also it must provide file handles to the used
kms device and the used gpu device.
This could look like:
struct renderonly ro = {
.create_for_resource = renderonly_create_gpu_import_for_resource,
.kms_fd = fd,
.gpu_fd = open("/dev/dri/renderD128", O_RDWR | O_CLOEXEC)
};
The renderonly_scanout object exits for two reasons:
- Do any special treatment for a scanout resource like importing the
GPU resource into the scanout hw.
- Make it easier for a gallium driver to detect if anything special
needs to be done in flush_resource(..) like a resolve to linear.
A GPU gallium driver which gets used as renderonly GPU needs to be
aware of the renderonly library.
This library will likely break android support and hopefully will get
replaced with a better solution based on gbm2.
Changes from V1 -> V2:
- reworked the lifecycle of renderonly object (suggested by Nicolai Hähnle)
- killed the midlayer (suggested by Thierry Reding)
- made the API more explicit regarding gpu and kms fd's
- added some docs
Signed-off-by: Christian Gmeiner <christian.gmeiner@gmail.com>
Acked-by: Emil Velikov <emil.velikov@collabora.com>
Tested-by: Alexandre Courbot <acourbot@nvidia.com>
