linux.git/drivers/gpu/drm/virtio/virtgpu_vq.c, branch v5.9

virtio: virtio_has_iommu_quirk -> virtio_has_dma_quirk

2020-08-03T20:11:42+00:00

Now that the corresponding feature bit has been renamed,
rename the quirk too - it's about special ways to
do DMA, not necessarily about the IOMMU.

Signed-off-by: Michael S. Tsirkin

drm/virtio: make virtio_gpu_object_attach void

2020-04-03T10:01:37+00:00

It always returns zero.

Signed-off-by: Gurchetan Singh 
Link: http://patchwork.freedesktop.org/patch/msgid/20200401223039.2860-4-gurchetansingh@chromium.org
Signed-off-by: Gerd Hoffmann

drm/virtio: factor out the sg_table from virtio_gpu_object

2020-03-09T09:44:34+00:00

A resource will be a shmem based resource or a (planned)
vram based resource, so it makes sense to factor out common fields
(resource handle, dumb).

v2: move mapped field to shmem object

Signed-off-by: Gurchetan Singh 
Link: http://patchwork.freedesktop.org/patch/msgid/20200305013212.130640-1-gurchetansingh@chromium.org
Signed-off-by: Gerd Hoffmann

drm/virtio: move remaining virtio_gpu_notify calls

2020-02-17T13:50:50+00:00

Move all remaining virtio_gpu_notify() calls from virtio_gpu_cmd_*
to the callers, for consistency reasons.

Signed-off-by: Gerd Hoffmann 
Reviewed-by: Chia-I Wu 
Reviewed-by: Gurchetan Singh 
Link: http://patchwork.freedesktop.org/patch/msgid/20200214125535.26349-7-kraxel@redhat.com

drm/virtio: batch display query

2020-02-17T13:50:49+00:00

Move virtio_gpu_notify() to higher-level functions for
virtio_gpu_cmd_get_display_info() and virtio_gpu_cmd_get_edids().

virtio_gpu_config_changed_work_func() and virtio_gpu_init() will
batch commands and notify only once per update

Signed-off-by: Gerd Hoffmann 
Reviewed-by: Chia-I Wu 
Reviewed-by: Gurchetan Singh 
Link: http://patchwork.freedesktop.org/patch/msgid/20200214125535.26349-6-kraxel@redhat.com

drm/virtio: batch resource creation

2020-02-17T13:50:49+00:00

Move virtio_gpu_notify() to higher-level functions for
virtio_gpu_cmd_create_resource(), virtio_gpu_cmd_resource_create_3d()
and virtio_gpu_cmd_resource_attach_backing().

virtio_gpu_object_create() will batch commands and notify only once when
creating a resource.

Signed-off-by: Gerd Hoffmann 
Reviewed-by: Chia-I Wu 
Reviewed-by: Gurchetan Singh 
Link: http://patchwork.freedesktop.org/patch/msgid/20200214125535.26349-5-kraxel@redhat.com

drm/virtio: batch plane updates (pageflip)

2020-02-17T13:50:49+00:00

Move virtio_gpu_notify() to higher-level functions for
virtio_gpu_cmd_resource_flush(), virtio_gpu_cmd_set_scanout() and
virtio_gpu_cmd_transfer_to_host_{2d,3d}().

virtio_gpu_primary_plane_update() will notify only once for a series
of commands (restores plane update command batching).

Signed-off-by: Gerd Hoffmann 
Reviewed-by: Chia-I Wu 
Reviewed-by: Gurchetan Singh 
Link: http://patchwork.freedesktop.org/patch/msgid/20200214125535.26349-4-kraxel@redhat.com

drm/virtio: notify before waiting

2020-02-17T13:50:49+00:00

Before we are going to wait for virtqueue entries becoming available
call virtio_gpu_notify() to make sure the host has seen everything
we've submitted.

Signed-off-by: Gerd Hoffmann 
Reviewed-by: Chia-I Wu 
Reviewed-by: Gurchetan Singh 
Link: http://patchwork.freedesktop.org/patch/msgid/20200214125535.26349-3-kraxel@redhat.com

drm/virtio: rework notification for better batching

2020-02-17T13:50:48+00:00

Drop the virtio_gpu_{disable,enable}_notify().  Add a new
virtio_gpu_notify() call instead, which must be called whenever
the driver wants make sure the host is notified needed.

Drop automatic notification from command submission.  Add
virtio_gpu_notify() calls after each command query instead.
This allows more fine-grained control over host notification
and can move around the notify calls in subsequent patches to
batch command submissions. With this in place it is also
possible to make notification optional for userspace ioctls.

Page flip batching goes away (temporarely).

v3:
 - move batching to separate patches.
v2:
 - rebase to latest drm-misc-next.
 - use "if (!atomic_read())".
 - add review & test tags.

Signed-off-by: Gerd Hoffmann 
Reviewed-by: Gurchetan Singh 
Tested-by: Gurchetan Singh 
Reviewed-by: Chia-I Wu 
Link: http://patchwork.freedesktop.org/patch/msgid/20200214125535.26349-2-kraxel@redhat.com

drm/virtio: fix error check

2020-02-14T09:24:47+00:00

The >= compare op must happen in cpu byte order, doing it in
little endian fails on big endian machines like s390.

Reported-by: Sebastian Mitterle 
Signed-off-by: Gerd Hoffmann 
Reviewed-by: Cornelia Huck 
Link: http://patchwork.freedesktop.org/patch/msgid/20200214080100.1273-1-kraxel@redhat.com