From: Ketil Johnsen <ketil.johnsen@xxxxxxx>
Similar to how the kernel driver notifies userspace about syncobj
modifications, the reverse notification is also necessary to let panthor
re-evaluate any queues (GPU or XGS) that were blocked on wait
operations.
Signed-off-by: Mihail Atanassov <mihail.atanassov@xxxxxxx>
Signed-off-by: Ketil Johnsen <ketil.johnsen@xxxxxxx>
---
drivers/gpu/drm/panthor/panthor_drv.c | 23 +++++++++++++++++++++++
1 file changed, 23 insertions(+)
diff --git a/drivers/gpu/drm/panthor/panthor_drv.c b/drivers/gpu/drm/panthor/panthor_drv.c
index 681ac09b6343..1734a52dc3b5 100644
--- a/drivers/gpu/drm/panthor/panthor_drv.c
+++ b/drivers/gpu/drm/panthor/panthor_drv.c
@@ -1426,6 +1426,28 @@ static int panthor_ioctl_xgs_queue_submit(struct drm_device *ddev, void *data,
return ret;
}
+static int panthor_ioctl_sync_update(struct drm_device *ddev, void *data,
+ struct drm_file *file)
+{
+ struct drm_panthor_sync_update *args = data;
+ struct panthor_device *ptdev = container_of(ddev, struct panthor_device, base);
+ struct panthor_file *pfile = file->driver_priv;
+
+ if (args->pad)
+ return -EINVAL;
+
+ if (pm_runtime_get_if_in_use(ddev->dev)) {
+ /* All sync wait ops will be re-evaluated when we ding the global doorbell */
+ gpu_write(ptdev, CSF_DOORBELL(0), 1);
+ pm_runtime_put_autosuspend(ddev->dev);
+ }
+
+ panthor_sched_sync_update(ptdev);
+ panthor_xgs_queue_pool_recheck(pfile);
+
+ return 0;
+}
+
static int
panthor_open(struct drm_device *ddev, struct drm_file *file)
{
@@ -1508,6 +1530,7 @@ static const struct drm_ioctl_desc panthor_drm_driver_ioctls[] = {
PANTHOR_IOCTL(XGS_QUEUE_CREATE, xgs_queue_create, DRM_RENDER_ALLOW),
PANTHOR_IOCTL(XGS_QUEUE_DESTROY, xgs_queue_destroy, DRM_RENDER_ALLOW),
PANTHOR_IOCTL(XGS_QUEUE_SUBMIT, xgs_queue_submit, DRM_RENDER_ALLOW),
+ PANTHOR_IOCTL(SYNC_UPDATE, sync_update, DRM_RENDER_ALLOW),
};
static int panthor_mmap(struct file *filp, struct vm_area_struct *vma)
--
2.45.0
