Add a new backend to enable using native driver in a VM guest, via a new
virtgpu context type which (indirectly) makes host kernel interface
available in guest and handles the details of mapping buffers to guest,
etc.
Note that fence-fd's are currently a bit awkward, in that they get
signaled by the guest kernel driver (drm/virtio) once virglrenderer in
the host has processed the execbuf, not when host kernel has signaled
the submit fence. For passing buffers to the host (virtio-wl) the egl
context in virglrenderer is used to create a fence on the host side.
But use of out-fence-fd's in guest could have slightly unexpected
results. For this reason we limit all submitqueues to default priority
(so they cannot be preepmted by host egl context). AFAICT virgl and
venus have a similar problem, which will eventually be solveable once we
have RESOURCE_CREATE_SYNC.
Signed-off-by: Rob Clark <robdclark@chromium.org>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/14900>
e9c3dbd046 added PIPE_BIND_DRI_PRIME but it was only set when
importing a prime buffer.
This commit adds handling of this flag in the other codepath = the
one where the prime buffer is allocated by the render GPU.
With this change PIPE_BIND_DRI_PRIME is still only set for the
render GPU - the display GPU will never see this flag; a future
commit will rename it.
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/14615>
The bug here is that the DRI context "flags" are intended to alias the
GLX context flag values, and they don't, DRI's no-error flag is GLX's
reset-isolation flag. GLX (and EGL!) treat no-error as a context
attribute, and reset isolation predates Mesa's no-error implementation
by several years. The GL_KHR_no_error spec does describe it as a
"context flag", though, so maybe that's why we do it as a (DRI) context
flag.
In order to unalias these we need a new contract with the loader. We
remove the old __DRI_NO_ERROR extension, and add a new
__DRI_RENDERER_HAS_CONTEXT_NO_ERROR value to query. Loaders can key on
that to know to pass no-error-ness through as a context attribute,
matching the GLX/EGL calling convention. We go ahead and define
__DRI_CTX_FLAG_RESET_ISOLATION as well, and update the drivers to refuse
it since we don't support it yet.
This means mismatched drivers/loaders will not be able to create
no-error contexts. Too bad. If you want performance that badly you can
build both things at once.
Reviewed-by: Emil Velikov <emil.l.velikov@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/12474>
Extends command submission ioctls to support multiple semaphores through
generic ioctl extension design. In this approach, a multisync extension
subclasses a generic ioctl extension struct (base) and enables more than
one wait and signal semaphores. Multisync extension also uses v3d_queue
to specify the wait_stage, i.e. which job should sync before start (wait
semaphores).
Signed-off-by: Melissa Wen <mwen@igalia.com>
Reviewed-by: Iago Toral Quiroga <itoral@igalia.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/13178>
This change allows creating contexts of depending on set of
context parameters. The meaning of each of the parameters
is listed below:
1) VIRTGPU_CONTEXT_PARAM_CAPSET_ID
This determines the type of a context based on the capability set
ID. For example, the current capsets:
VIRTIO_GPU_CAPSET_VIRGL
VIRTIO_GPU_CAPSET_VIRGL2
define a Gallium, TGSI based "virgl" context. We only need 1 capset
ID per context type, though virgl has two due a bug that has since
been fixed.
The use case is the "gfxstream" rendering library and "venus"
renderer.
gfxstream doesn't do Gallium/TGSI translation and mostly relies on
auto-generated API streaming. Certain users prefer gfxstream over
virgl for GLES on GLES emulation. {gfxstream vk}/{venus} are also
required for Vulkan emulation.
The goal is for guest userspace to choose the optimal context type
depending on the situation/hardware.
2) VIRTGPU_CONTEXT_PARAM_NUM_RINGS
This tells the number of independent command rings that the context
will use. This value may be zero and is inferred to be zero if
VIRTGPU_CONTEXT_PARAM_NUM_RINGS is not passed in. This is backwards
compatibility for virgl, which has one big giant command ring for all
commands.
The maxiumum number of rings is 32. In practice, multi-queue or
multi-ring submission is used for powerful dGPUs and virtio-gpu
may not be the best option in that case (see PCI passthrough or
rendernode forwarding).
3) VIRTGPU_CONTEXT_PARAM_POLL_RING_IDX_MASK
This is a mask of ring indices for which the DRM fd is pollable.
For example, if VIRTGPU_CONTEXT_PARAM_NUM_RINGS is 2, then the mask
may be:
[ring idx] | [1 << ring_idx] | final mask
-------------------------------------------
0 1 1
1 2 3
The "Sommelier" guest Wayland proxy uses this to poll for events
from the host compositor.
Reviewed-by: Anthoine Bourgeois <anthoine.bourgeois@gmail.com>
Tested-by: Anthoine Bourgeois <anthoine.bourgeois@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/7712>
__declspec(dllimport) isn't needed for linking to functions, extern
is sufficient. The preprocessor define used to determine when to
set it (_DLL) was incorrect, since that preprocessor define is set
anytime you're linking against dynamic CRT as opposed to static CRT.
Reviewed-by: Bill Kristiansen <billkris@Microsoft.com>
Reviewed-by: Marek Olák <marek.olsak@amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/12776>
