| Message ID | 20241020230803.247419-2-dmitry.osipenko@collabora.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | [v3,1/2] drm/virtio: Use drm_gem_plane_helper_prepare_fb() | expand |
Hi Dmitry, > Subject: [PATCH v3 2/2] drm/virtio: New fence for every plane update > > From: Dongwon Kim <dongwon.kim@intel.com> > > Having a fence linked to a virtio_gpu_framebuffer in the plane update > sequence would cause conflict when several planes referencing the same > framebuffer (e.g. Xorg screen covering multi-displays configured for an > extended mode) and those planes are updated concurrently. So it is needed > to allocate a fence for every plane state instead of the framebuffer. > > Signed-off-by: Dongwon Kim <dongwon.kim@intel.com> > [dmitry.osipenko@collabora.com: rebase, fix up, edit commit message] > Signed-off-by: Dmitry Osipenko <dmitry.osipenko@collabora.com> > --- > drivers/gpu/drm/virtio/virtgpu_drv.h | 7 ++++ > drivers/gpu/drm/virtio/virtgpu_plane.c | 58 +++++++++++++++++--------- > 2 files changed, 46 insertions(+), 19 deletions(-) > > diff --git a/drivers/gpu/drm/virtio/virtgpu_drv.h > b/drivers/gpu/drm/virtio/virtgpu_drv.h > index 64c236169db8..5dc8eeaf7123 100644 > --- a/drivers/gpu/drm/virtio/virtgpu_drv.h > +++ b/drivers/gpu/drm/virtio/virtgpu_drv.h > @@ -194,6 +194,13 @@ struct virtio_gpu_framebuffer { > #define to_virtio_gpu_framebuffer(x) \ > container_of(x, struct virtio_gpu_framebuffer, base) > > +struct virtio_gpu_plane_state { > + struct drm_plane_state base; > + struct virtio_gpu_fence *fence; > +}; > +#define to_virtio_gpu_plane_state(x) \ > + container_of(x, struct virtio_gpu_plane_state, base) > + > struct virtio_gpu_queue { > struct virtqueue *vq; > spinlock_t qlock; > diff --git a/drivers/gpu/drm/virtio/virtgpu_plane.c > b/drivers/gpu/drm/virtio/virtgpu_plane.c > index ab7232921cb7..2add67c6b66d 100644 > --- a/drivers/gpu/drm/virtio/virtgpu_plane.c > +++ b/drivers/gpu/drm/virtio/virtgpu_plane.c > @@ -67,11 +67,28 @@ uint32_t virtio_gpu_translate_format(uint32_t > drm_fourcc) > return format; > } > > +static struct > +drm_plane_state *virtio_gpu_plane_duplicate_state(struct drm_plane > *plane) > +{ > + struct virtio_gpu_plane_state *new; > + > + if (WARN_ON(!plane->state)) > + return NULL; > + > + new = kzalloc(sizeof(*new), GFP_KERNEL); > + if (!new) > + return NULL; > + > + __drm_atomic_helper_plane_duplicate_state(plane, &new->base); > + > + return &new->base; > +} > + > static const struct drm_plane_funcs virtio_gpu_plane_funcs = { > .update_plane = drm_atomic_helper_update_plane, > .disable_plane = drm_atomic_helper_disable_plane, > .reset = drm_atomic_helper_plane_reset, > - .atomic_duplicate_state = > drm_atomic_helper_plane_duplicate_state, > + .atomic_duplicate_state = virtio_gpu_plane_duplicate_state, > .atomic_destroy_state = drm_atomic_helper_plane_destroy_state, > }; > > @@ -139,11 +156,13 @@ static void virtio_gpu_resource_flush(struct > drm_plane *plane, > struct drm_device *dev = plane->dev; > struct virtio_gpu_device *vgdev = dev->dev_private; > struct virtio_gpu_framebuffer *vgfb; > + struct virtio_gpu_plane_state *vgplane_st; > struct virtio_gpu_object *bo; > > vgfb = to_virtio_gpu_framebuffer(plane->state->fb); > + vgplane_st = to_virtio_gpu_plane_state(plane->state); > bo = gem_to_virtio_gpu_obj(vgfb->base.obj[0]); > - if (vgfb->fence) { > + if (vgplane_st->fence) { > struct virtio_gpu_object_array *objs; > > objs = virtio_gpu_array_alloc(1); > @@ -152,13 +171,11 @@ static void virtio_gpu_resource_flush(struct > drm_plane *plane, > virtio_gpu_array_add_obj(objs, vgfb->base.obj[0]); > virtio_gpu_array_lock_resv(objs); > virtio_gpu_cmd_resource_flush(vgdev, bo->hw_res_handle, > x, y, > - width, height, objs, vgfb->fence); > + width, height, objs, > + vgplane_st->fence); > virtio_gpu_notify(vgdev); > - > - dma_fence_wait_timeout(&vgfb->fence->f, true, > + dma_fence_wait_timeout(&vgplane_st->fence->f, true, > msecs_to_jiffies(50)); > - dma_fence_put(&vgfb->fence->f); > - vgfb->fence = NULL; Not sure if it makes any difference but would there be a problem if you unref the fence here (existing behavior) instead of deferring it until cleanup? > } else { > virtio_gpu_cmd_resource_flush(vgdev, bo->hw_res_handle, > x, y, > width, height, NULL, NULL); > @@ -248,12 +265,14 @@ static int virtio_gpu_plane_prepare_fb(struct > drm_plane *plane, > struct drm_device *dev = plane->dev; > struct virtio_gpu_device *vgdev = dev->dev_private; > struct virtio_gpu_framebuffer *vgfb; > + struct virtio_gpu_plane_state *vgplane_st; > struct virtio_gpu_object *bo; > > if (!new_state->fb) > return 0; > > vgfb = to_virtio_gpu_framebuffer(new_state->fb); > + vgplane_st = to_virtio_gpu_plane_state(new_state); > bo = gem_to_virtio_gpu_obj(vgfb->base.obj[0]); > > drm_gem_plane_helper_prepare_fb(plane, new_state); > @@ -261,10 +280,11 @@ static int virtio_gpu_plane_prepare_fb(struct > drm_plane *plane, > if (!bo || (plane->type == DRM_PLANE_TYPE_PRIMARY && !bo- > >guest_blob)) > return 0; > > - if (bo->dumb && (plane->state->fb != new_state->fb)) { > - vgfb->fence = virtio_gpu_fence_alloc(vgdev, vgdev- > >fence_drv.context, > + if (bo->dumb) { > + vgplane_st->fence = virtio_gpu_fence_alloc(vgdev, > + vgdev->fence_drv.context, > 0); > - if (!vgfb->fence) > + if (!vgplane_st->fence) > return -ENOMEM; > } > > @@ -274,15 +294,15 @@ static int virtio_gpu_plane_prepare_fb(struct > drm_plane *plane, > static void virtio_gpu_plane_cleanup_fb(struct drm_plane *plane, > struct drm_plane_state *state) > { > - struct virtio_gpu_framebuffer *vgfb; > + struct virtio_gpu_plane_state *vgplane_st; > > if (!state->fb) > return; > > - vgfb = to_virtio_gpu_framebuffer(state->fb); > - if (vgfb->fence) { > - dma_fence_put(&vgfb->fence->f); > - vgfb->fence = NULL; > + vgplane_st = to_virtio_gpu_plane_state(state); > + if (vgplane_st->fence) { > + dma_fence_put(&vgplane_st->fence->f); > + vgplane_st->fence = NULL; > } > } > > @@ -295,6 +315,7 @@ static void virtio_gpu_cursor_plane_update(struct > drm_plane *plane, > struct virtio_gpu_device *vgdev = dev->dev_private; > struct virtio_gpu_output *output = NULL; > struct virtio_gpu_framebuffer *vgfb; > + struct virtio_gpu_plane_state *vgplane_st; > struct virtio_gpu_object *bo = NULL; > uint32_t handle; > > @@ -307,6 +328,7 @@ static void virtio_gpu_cursor_plane_update(struct > drm_plane *plane, > > if (plane->state->fb) { > vgfb = to_virtio_gpu_framebuffer(plane->state->fb); > + vgplane_st = to_virtio_gpu_plane_state(plane->state); > bo = gem_to_virtio_gpu_obj(vgfb->base.obj[0]); > handle = bo->hw_res_handle; > } else { > @@ -326,11 +348,9 @@ static void virtio_gpu_cursor_plane_update(struct > drm_plane *plane, > (vgdev, 0, > plane->state->crtc_w, > plane->state->crtc_h, > - 0, 0, objs, vgfb->fence); > + 0, 0, objs, vgplane_st->fence); > virtio_gpu_notify(vgdev); > - dma_fence_wait(&vgfb->fence->f, true); > - dma_fence_put(&vgfb->fence->f); > - vgfb->fence = NULL; Same comment as above. Regardless, the patch LGTM. Acked-by: Vivek Kasireddy <vivek.kasireddy@intel.com> > + dma_fence_wait(&vgplane_st->fence->f, true); > } > > if (plane->state->fb != old_state->fb) { > -- > 2.47.0
On 10/22/24 07:44, Kasireddy, Vivek wrote: >> virtio_gpu_cmd_resource_flush(vgdev, bo->hw_res_handle, >> x, y, >> - width, height, objs, vgfb->fence); >> + width, height, objs, >> + vgplane_st->fence); >> virtio_gpu_notify(vgdev); >> - >> - dma_fence_wait_timeout(&vgfb->fence->f, true, >> + dma_fence_wait_timeout(&vgplane_st->fence->f, true, >> msecs_to_jiffies(50)); >> - dma_fence_put(&vgfb->fence->f); >> - vgfb->fence = NULL; > Not sure if it makes any difference but would there be a problem if you unref > the fence here (existing behavior) instead of deferring it until cleanup? Previously fence was a part of virtio-gpu framebuffer, which was kind of a hack. Maybe there was no better option back then, when this code was written initially. Now fence is a part of plane's atomic state, like it should be. We shouldn't change atomic state at the commit time. ... >> @@ -326,11 +348,9 @@ static void virtio_gpu_cursor_plane_update(struct >> drm_plane *plane, >> (vgdev, 0, >> plane->state->crtc_w, >> plane->state->crtc_h, >> - 0, 0, objs, vgfb->fence); >> + 0, 0, objs, vgplane_st->fence); >> virtio_gpu_notify(vgdev); >> - dma_fence_wait(&vgfb->fence->f, true); >> - dma_fence_put(&vgfb->fence->f); >> - vgfb->fence = NULL; > Same comment as above. > Regardless, the patch LGTM. > > Acked-by: Vivek Kasireddy <vivek.kasireddy@intel.com> Thanks for the review :)
diff --git a/drivers/gpu/drm/virtio/virtgpu_drv.h b/drivers/gpu/drm/virtio/virtgpu_drv.h index 64c236169db8..5dc8eeaf7123 100644 --- a/drivers/gpu/drm/virtio/virtgpu_drv.h +++ b/drivers/gpu/drm/virtio/virtgpu_drv.h @@ -194,6 +194,13 @@ struct virtio_gpu_framebuffer { #define to_virtio_gpu_framebuffer(x) \ container_of(x, struct virtio_gpu_framebuffer, base) +struct virtio_gpu_plane_state { + struct drm_plane_state base; + struct virtio_gpu_fence *fence; +}; +#define to_virtio_gpu_plane_state(x) \ + container_of(x, struct virtio_gpu_plane_state, base) + struct virtio_gpu_queue { struct virtqueue *vq; spinlock_t qlock; diff --git a/drivers/gpu/drm/virtio/virtgpu_plane.c b/drivers/gpu/drm/virtio/virtgpu_plane.c index ab7232921cb7..2add67c6b66d 100644 --- a/drivers/gpu/drm/virtio/virtgpu_plane.c +++ b/drivers/gpu/drm/virtio/virtgpu_plane.c @@ -67,11 +67,28 @@ uint32_t virtio_gpu_translate_format(uint32_t drm_fourcc) return format; } +static struct +drm_plane_state *virtio_gpu_plane_duplicate_state(struct drm_plane *plane) +{ + struct virtio_gpu_plane_state *new; + + if (WARN_ON(!plane->state)) + return NULL; + + new = kzalloc(sizeof(*new), GFP_KERNEL); + if (!new) + return NULL; + + __drm_atomic_helper_plane_duplicate_state(plane, &new->base); + + return &new->base; +} + static const struct drm_plane_funcs virtio_gpu_plane_funcs = { .update_plane = drm_atomic_helper_update_plane, .disable_plane = drm_atomic_helper_disable_plane, .reset = drm_atomic_helper_plane_reset, - .atomic_duplicate_state = drm_atomic_helper_plane_duplicate_state, + .atomic_duplicate_state = virtio_gpu_plane_duplicate_state, .atomic_destroy_state = drm_atomic_helper_plane_destroy_state, }; @@ -139,11 +156,13 @@ static void virtio_gpu_resource_flush(struct drm_plane *plane, struct drm_device *dev = plane->dev; struct virtio_gpu_device *vgdev = dev->dev_private; struct virtio_gpu_framebuffer *vgfb; + struct virtio_gpu_plane_state *vgplane_st; struct virtio_gpu_object *bo; vgfb = to_virtio_gpu_framebuffer(plane->state->fb); + vgplane_st = to_virtio_gpu_plane_state(plane->state); bo = gem_to_virtio_gpu_obj(vgfb->base.obj[0]); - if (vgfb->fence) { + if (vgplane_st->fence) { struct virtio_gpu_object_array *objs; objs = virtio_gpu_array_alloc(1); @@ -152,13 +171,11 @@ static void virtio_gpu_resource_flush(struct drm_plane *plane, virtio_gpu_array_add_obj(objs, vgfb->base.obj[0]); virtio_gpu_array_lock_resv(objs); virtio_gpu_cmd_resource_flush(vgdev, bo->hw_res_handle, x, y, - width, height, objs, vgfb->fence); + width, height, objs, + vgplane_st->fence); virtio_gpu_notify(vgdev); - - dma_fence_wait_timeout(&vgfb->fence->f, true, + dma_fence_wait_timeout(&vgplane_st->fence->f, true, msecs_to_jiffies(50)); - dma_fence_put(&vgfb->fence->f); - vgfb->fence = NULL; } else { virtio_gpu_cmd_resource_flush(vgdev, bo->hw_res_handle, x, y, width, height, NULL, NULL); @@ -248,12 +265,14 @@ static int virtio_gpu_plane_prepare_fb(struct drm_plane *plane, struct drm_device *dev = plane->dev; struct virtio_gpu_device *vgdev = dev->dev_private; struct virtio_gpu_framebuffer *vgfb; + struct virtio_gpu_plane_state *vgplane_st; struct virtio_gpu_object *bo; if (!new_state->fb) return 0; vgfb = to_virtio_gpu_framebuffer(new_state->fb); + vgplane_st = to_virtio_gpu_plane_state(new_state); bo = gem_to_virtio_gpu_obj(vgfb->base.obj[0]); drm_gem_plane_helper_prepare_fb(plane, new_state); @@ -261,10 +280,11 @@ static int virtio_gpu_plane_prepare_fb(struct drm_plane *plane, if (!bo || (plane->type == DRM_PLANE_TYPE_PRIMARY && !bo->guest_blob)) return 0; - if (bo->dumb && (plane->state->fb != new_state->fb)) { - vgfb->fence = virtio_gpu_fence_alloc(vgdev, vgdev->fence_drv.context, + if (bo->dumb) { + vgplane_st->fence = virtio_gpu_fence_alloc(vgdev, + vgdev->fence_drv.context, 0); - if (!vgfb->fence) + if (!vgplane_st->fence) return -ENOMEM; } @@ -274,15 +294,15 @@ static int virtio_gpu_plane_prepare_fb(struct drm_plane *plane, static void virtio_gpu_plane_cleanup_fb(struct drm_plane *plane, struct drm_plane_state *state) { - struct virtio_gpu_framebuffer *vgfb; + struct virtio_gpu_plane_state *vgplane_st; if (!state->fb) return; - vgfb = to_virtio_gpu_framebuffer(state->fb); - if (vgfb->fence) { - dma_fence_put(&vgfb->fence->f); - vgfb->fence = NULL; + vgplane_st = to_virtio_gpu_plane_state(state); + if (vgplane_st->fence) { + dma_fence_put(&vgplane_st->fence->f); + vgplane_st->fence = NULL; } } @@ -295,6 +315,7 @@ static void virtio_gpu_cursor_plane_update(struct drm_plane *plane, struct virtio_gpu_device *vgdev = dev->dev_private; struct virtio_gpu_output *output = NULL; struct virtio_gpu_framebuffer *vgfb; + struct virtio_gpu_plane_state *vgplane_st; struct virtio_gpu_object *bo = NULL; uint32_t handle; @@ -307,6 +328,7 @@ static void virtio_gpu_cursor_plane_update(struct drm_plane *plane, if (plane->state->fb) { vgfb = to_virtio_gpu_framebuffer(plane->state->fb); + vgplane_st = to_virtio_gpu_plane_state(plane->state); bo = gem_to_virtio_gpu_obj(vgfb->base.obj[0]); handle = bo->hw_res_handle; } else { @@ -326,11 +348,9 @@ static void virtio_gpu_cursor_plane_update(struct drm_plane *plane, (vgdev, 0, plane->state->crtc_w, plane->state->crtc_h, - 0, 0, objs, vgfb->fence); + 0, 0, objs, vgplane_st->fence); virtio_gpu_notify(vgdev); - dma_fence_wait(&vgfb->fence->f, true); - dma_fence_put(&vgfb->fence->f); - vgfb->fence = NULL; + dma_fence_wait(&vgplane_st->fence->f, true); } if (plane->state->fb != old_state->fb) {