summaryrefslogtreecommitdiff
path: root/drivers/gpu/drm/i915/i915_sw_fence_work.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/gpu/drm/i915/i915_sw_fence_work.c')
-rw-r--r--drivers/gpu/drm/i915/i915_sw_fence_work.c95
1 files changed, 95 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/i915_sw_fence_work.c b/drivers/gpu/drm/i915/i915_sw_fence_work.c
new file mode 100644
index 000000000000..07552cd544f2
--- /dev/null
+++ b/drivers/gpu/drm/i915/i915_sw_fence_work.c
@@ -0,0 +1,95 @@
+// SPDX-License-Identifier: MIT
+
+/*
+ * Copyright © 2019 Intel Corporation
+ */
+
+#include "i915_sw_fence_work.h"
+
+static void fence_work(struct work_struct *work)
+{
+ struct dma_fence_work *f = container_of(work, typeof(*f), work);
+ int err;
+
+ err = f->ops->work(f);
+ if (err)
+ dma_fence_set_error(&f->dma, err);
+ dma_fence_signal(&f->dma);
+ dma_fence_put(&f->dma);
+}
+
+static int __i915_sw_fence_call
+fence_notify(struct i915_sw_fence *fence, enum i915_sw_fence_notify state)
+{
+ struct dma_fence_work *f = container_of(fence, typeof(*f), chain);
+
+ switch (state) {
+ case FENCE_COMPLETE:
+ if (fence->error)
+ dma_fence_set_error(&f->dma, fence->error);
+
+ if (!f->dma.error) {
+ dma_fence_get(&f->dma);
+ queue_work(system_unbound_wq, &f->work);
+ } else {
+ dma_fence_signal(&f->dma);
+ }
+ break;
+
+ case FENCE_FREE:
+ dma_fence_put(&f->dma);
+ break;
+ }
+
+ return NOTIFY_DONE;
+}
+
+static const char *get_driver_name(struct dma_fence *fence)
+{
+ return "dma-fence";
+}
+
+static const char *get_timeline_name(struct dma_fence *fence)
+{
+ struct dma_fence_work *f = container_of(fence, typeof(*f), dma);
+
+ return f->ops->name ?: "work";
+}
+
+static void fence_release(struct dma_fence *fence)
+{
+ struct dma_fence_work *f = container_of(fence, typeof(*f), dma);
+
+ if (f->ops->release)
+ f->ops->release(f);
+
+ i915_sw_fence_fini(&f->chain);
+
+ BUILD_BUG_ON(offsetof(typeof(*f), dma));
+ dma_fence_free(&f->dma);
+}
+
+static const struct dma_fence_ops fence_ops = {
+ .get_driver_name = get_driver_name,
+ .get_timeline_name = get_timeline_name,
+ .release = fence_release,
+};
+
+void dma_fence_work_init(struct dma_fence_work *f,
+ const struct dma_fence_work_ops *ops)
+{
+ spin_lock_init(&f->lock);
+ dma_fence_init(&f->dma, &fence_ops, &f->lock, 0, 0);
+ i915_sw_fence_init(&f->chain, fence_notify);
+ INIT_WORK(&f->work, fence_work);
+
+ f->ops = ops;
+}
+
+int dma_fence_work_chain(struct dma_fence_work *f, struct dma_fence *signal)
+{
+ if (!signal)
+ return 0;
+
+ return __i915_sw_fence_await_dma_fence(&f->chain, signal, &f->cb);
+}