This is the list of locations where GBM will look
for alternate backend implementations based on the
DRM driver name. It defaults to $libdir/gbm.
On Android, this path is currently hard-coded to
/vendor/lib[64]/gbm.
Signed-off-by: James Jones <jajones@nvidia.com>
Reviewed-by: Emil Velikov <emil.l.velikov@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/9902>
Separate the path-building and dlopen() portion of
loader_open_driver() from the DRI extension
loading logic. The former will be shared by the
GBM backend loading logic in a subsequent change.
Signed-off-by: James Jones <jajones@nvidia.com>
Reviewed-by: Michel Dänzer <mdaenzer@redhat.com>
Reviewed-by: Emil Velikov <emil.l.velikov@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/9902>
This just makes it clearer the array isn't a global
list of all backends in use.
Signed-off-by: James Jones <jajones@nvidia.com>
Reviewed-by: Michel Dänzer <mdaenzer@redhat.com>
Reviewed-by: Emil Velikov <emil.l.velikov@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/9902>
This is based on the wayland EGL library ABI test
framework. The helper macros were copied from
there and expanded to support more than one
struct/type, and to additionally check member
type compatibility by default.
Signed-off-by: James Jones <jajones@nvidia.com>
Reviewed-by: Emil Velikov <emil.l.velikov@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/9902>
Define a version number for the interface GBM uses
to offload work to its backends/drivers. Store the
version in the backend interface structs provided
to the loader by backends, as well as in the core
interface struct provided to backends by the GBM
loader code to backends.
The backend can create structures of any version
it supports, which can be greater or less than the
interface version specified by GBM in the core
interface structure. Hence, GBM will need to take
care to check the backend version before accessing
any members added to structs defined in
gbm_backend_abi.h after this change.
Similarly, the backend may need to check the
interface version supported by the GBM library
before passing back data in any structure members
that require the GBM library to interact with
them for correct operation. For example, if for
some reason a structure defined in
gbm_backend_abi.h gained a field which was a
pointer to memory allocated by the backend and
freed by GBM, the backend should avoid allocating
this memory if the GBM library did not specify an
interface version new enough to indicate that it
was aware of the new structure member.
Signed-off-by: James Jones <jajones@nvidia.com>
Reviewed-by: Michel Dänzer <mdaenzer@redhat.com>
Reviewed-by: Emil Velikov <emil.l.velikov@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/9902>
The content of gbm_backend_abi.h are nearly an
identical copy of the old gbmint.h. Only minimal
modifications have been made to ease history
tracking. Subsequent changes will further
formalize the ABI structures in gbm_backend_abi.h
Signed-off-by: James Jones <jajones@nvidia.com>
Reviewed-by: Michel Dänzer <mdaenzer@redhat.com>
Reviewed-by: Emil Velikov <emil.l.velikov@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/9902>
The GBM core/loader code defines one helper
function used by both itself and the built-in DRI
backend. Presumably, external backend authors
would want to use such functions as well, so
package them into a single struct that will be
passed explicitly to externally loaded backends in
subsequent changes.
Another option considered was to simply export
the gbm_format_canonicalize() function directly,
optionally renaming it to better indicate it is
intended only for "internal" use first. However,
even with a rename, this would expose it to
potential use by applications as well, which is
not ideal, as it is not intended to be part of
the application-facing GBM ABI.
Signed-off-by: James Jones <jajones@nvidia.com>
Reviewed-by: Michel Dänzer <mdaenzer@redhat.com>
Reviewed-by: Emil Velikov <emil.l.velikov@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/9902>
This will be used for looking up the backend
again at destruction time to perform any backend-
agnostic cleanup. To facilitate that, also
dispatch device destruction to the backend manager
code.
Signed-off-by: James Jones <jajones@nvidia.com>
Reviewed-by: Michel Dänzer <mdaenzer@redhat.com>
Reviewed-by: Emil Velikov <emil.l.velikov@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/9902>
It was a functional no-op with the currently
available backends (Only DRI), and its implied
intended functionality is implemented elsewhere
in subsequent patches.
Signed-off-by: James Jones <jajones@nvidia.com>
Reviewed-by: Michel Dänzer <mdaenzer@redhat.com>
Reviewed-by: Emil Velikov <emil.l.velikov@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/9902>
James Jones
Mike Blumenkrantz
luc
Icecream95
Dave Airlie
Alyssa Rosenzweig
Rhys Perry