On Fri, Aug 02, 2019 at 10:27:21AM -0400, Michael S. Tsirkin wrote:
> On Fri, Aug 02, 2019 at 09:46:13AM -0300, Jason Gunthorpe wrote:
> > On Fri, Aug 02, 2019 at 05:40:07PM +0800, Jason Wang wrote:
> > > > This must be a proper barrier, like a spinlock, mutex, or
> > > > synchronize_rcu.
> > >
>
On Fri, Aug 02, 2019 at 09:46:13AM -0300, Jason Gunthorpe wrote:
> On Fri, Aug 02, 2019 at 05:40:07PM +0800, Jason Wang wrote:
> > > This must be a proper barrier, like a spinlock, mutex, or
> > > synchronize_rcu.
> >
> >
> > I start with synchronize_rcu() but both you and Michael raise some
> >
On Fri, Aug 02, 2019 at 05:40:07PM +0800, Jason Wang wrote:
> Btw, I come up another idea, that is to disable preemption when vhost thread
> need to access the memory. Then register preempt notifier and if vhost
> thread is preempted, we're sure no one will access the memory and can do the
>
Some helper functions to manage an array of gem objects.
v6:
- add ticket to struct virtio_gpu_object_array.
- add virtio_gpu_array_{lock,unlock}_resv helpers.
- add virtio_gpu_array_add_fence helper.
v5: some small optimizations (Chia-I Wu).
v4: make them virtio-private instead of generic
Rework fencing workflow, starting with virtio_gpu_execbuffer_ioctl.
Stop using ttm helpers, use the virtio_gpu_array_* helpers (which work
on the reservation objects directly) instead.
Also store the object array in struct virtio_gpu_vbuffer, so we
explicitly keep a reference of all buffers used
No users left.
Signed-off-by: Gerd Hoffmann
---
drivers/gpu/drm/virtio/virtgpu_drv.h | 15 ---
1 file changed, 15 deletions(-)
diff --git a/drivers/gpu/drm/virtio/virtgpu_drv.h
b/drivers/gpu/drm/virtio/virtgpu_drv.h
index d4d82679d83a..59f71dc94017 100644
---
Switch to the virtio_gpu_array_* helper workflow.
Signed-off-by: Gerd Hoffmann
---
drivers/gpu/drm/virtio/virtgpu_drv.h | 3 +-
drivers/gpu/drm/virtio/virtgpu_ioctl.c | 40 ++
drivers/gpu/drm/virtio/virtgpu_vq.c| 8 --
3 files changed, 23 insertions(+), 28
No need to do the reservation dance,
we can just wait on the fence directly.
Signed-off-by: Gerd Hoffmann
Reviewed-by: Daniel Vetter
---
drivers/gpu/drm/virtio/virtgpu_plane.c | 13 +++--
1 file changed, 3 insertions(+), 10 deletions(-)
diff --git
Make sure we don't leak half-initialized fences outside the driver.
Signed-off-by: Gerd Hoffmann
---
drivers/gpu/drm/virtio/virtgpu_fence.c | 4
1 file changed, 4 insertions(+)
diff --git a/drivers/gpu/drm/virtio/virtgpu_fence.c
b/drivers/gpu/drm/virtio/virtgpu_fence.c
index
virtio-gpu basically needs a sg_table for the bo, to tell the host where
the backing pages for the object are. So the gem shmem helpers are a
perfect fit. Some drm_gem_object_funcs need thin wrappers to update the
host state, but otherwise the helpers handle everything just fine.
Once the
All callers pass no_wait = false.
Signed-off-by: Gerd Hoffmann
Reviewed-by: Daniel Vetter
---
drivers/gpu/drm/virtio/virtgpu_drv.h | 5 ++---
drivers/gpu/drm/virtio/virtgpu_gem.c | 4 ++--
drivers/gpu/drm/virtio/virtgpu_ioctl.c | 4 ++--
3 files changed, 6 insertions(+), 7 deletions(-)
Thin wrapper around virtio_gpu_object_create(),
but calling that directly works equally well.
Signed-off-by: Gerd Hoffmann
Acked-by: Daniel Vetter
---
drivers/gpu/drm/virtio/virtgpu_drv.h | 4
drivers/gpu/drm/virtio/virtgpu_gem.c | 23 ---
Switch to the virtio_gpu_array_* helper workflow.
Signed-off-by: Gerd Hoffmann
---
drivers/gpu/drm/virtio/virtgpu_drv.h | 4 ++--
drivers/gpu/drm/virtio/virtgpu_gem.c | 24 +++-
drivers/gpu/drm/virtio/virtgpu_vq.c | 12
3 files changed, 21 insertions(+), 19
No users left.
Signed-off-by: Gerd Hoffmann
---
drivers/gpu/drm/virtio/virtgpu_drv.h | 21 -
1 file changed, 21 deletions(-)
diff --git a/drivers/gpu/drm/virtio/virtgpu_drv.h
b/drivers/gpu/drm/virtio/virtgpu_drv.h
index 59f71dc94017..fb35831ed351 100644
---
No users left.
Signed-off-by: Gerd Hoffmann
Reviewed-by: Daniel Vetter
---
drivers/gpu/drm/virtio/virtgpu_drv.h| 1 -
drivers/gpu/drm/virtio/virtgpu_object.c | 13 -
2 files changed, 14 deletions(-)
diff --git a/drivers/gpu/drm/virtio/virtgpu_drv.h
Call reservation_object_* directly instead
of using ttm_bo_{reserve,unreserve}.
v4: check for EINTR only.
v3: check for EINTR too.
Signed-off-by: Gerd Hoffmann
Reviewed-by: Daniel Vetter
---
drivers/gpu/drm/virtio/virtgpu_drv.h | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff
Use drm_gem_reservation_object_wait() in virtio_gpu_wait_ioctl().
This also makes the ioctl run lockless.
v5: handle lookup failure.
v2: use reservation_object_test_signaled_rcu for VIRTGPU_WAIT_NOWAIT.
Signed-off-by: Gerd Hoffmann
Reviewed-by: Daniel Vetter
---
Switch to the virtio_gpu_array_* helper workflow.
Signed-off-by: Gerd Hoffmann
---
drivers/gpu/drm/virtio/virtgpu_drv.h | 4 +--
drivers/gpu/drm/virtio/virtgpu_ioctl.c | 50 +++---
drivers/gpu/drm/virtio/virtgpu_plane.c | 21 ---
With this gem and ttm will use the same reservation object,
so mixing and matching ttm / gem reservation helpers should
work fine.
Signed-off-by: Gerd Hoffmann
Reviewed-by: Daniel Vetter
---
drivers/gpu/drm/virtio/virtgpu_object.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff
Rework fencing workflow. Stop using ttm helpers, use the
virtio_gpu_array_* helpers instead.
Due to using the gem reservation object it is initialized and ready for
use before calling ttm_bo_init. So we can simply use the standard
fencing workflow and drop the tricky logic which checks whenever
No users left.
Signed-off-by: Gerd Hoffmann
Acked-by: Daniel Vetter
---
drivers/gpu/drm/virtio/virtgpu_drv.h | 3 --
drivers/gpu/drm/virtio/virtgpu_ioctl.c | 39 --
2 files changed, 42 deletions(-)
diff --git a/drivers/gpu/drm/virtio/virtgpu_drv.h
On Fri, Aug 02, 2019 at 05:40:07PM +0800, Jason Wang wrote:
> > This must be a proper barrier, like a spinlock, mutex, or
> > synchronize_rcu.
>
>
> I start with synchronize_rcu() but both you and Michael raise some
> concern.
I've also idly wondered if calling synchronize_rcu() under the
On 2019/8/1 下午10:15, Jason Gunthorpe wrote:
On Thu, Aug 01, 2019 at 01:02:18PM +0800, Jason Wang wrote:
On 2019/8/1 上午3:30, Jason Gunthorpe wrote:
On Wed, Jul 31, 2019 at 09:28:20PM +0800, Jason Wang wrote:
On 2019/7/31 下午8:39, Jason Gunthorpe wrote:
On Wed, Jul 31, 2019 at 04:46:53AM
> @@ -291,11 +291,9 @@ static int virtio_gpu_queue_ctrl_buffer_locked(struct
> virtio_gpu_device *vgdev,
> trace_virtio_gpu_cmd_queue(vq,
> (struct virtio_gpu_ctrl_hdr *)vbuf->buf);
>
> - virtqueue_kick(vq);
> + ret =
On Thu, Aug 01, 2019 at 04:16:37PM +, Dexuan Cui wrote:
> > From: Stefano Garzarella
> > Sent: Thursday, August 1, 2019 8:26 AM
> >
> > The vsock_diag.ko module already has a test suite but the core AF_VSOCK
> > functionality has no tests. This patch series adds several test cases that
> >
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