nouveau: move nv50/nvc0 fencing to common location, and modify slightly

Modified from original to remove chipset-specific code, and to be decoupled
from the mm present in said drivers.

Signed-off-by: Ben Skeggs <[email protected]>

1 files changed, 58 insertions, 0 deletions

diff --git a/src/gallium/drivers/nouveau/nouveau_fence.h b/src/gallium/drivers/nouveau/nouveau_fence.h
new file mode 100644
index 00000000000..785fc8d2a0a
--- /dev/null
+++ b/src/gallium/drivers/nouveau/nouveau_fence.h
@@ -0,0 +1,58 @@
+
+#ifndef __NOUVEAU_FENCE_H__
+#define __NOUVEAU_FENCE_H__
+
+#include "util/u_inlines.h"
+#include "util/u_double_list.h"
+
+#define NOUVEAU_FENCE_STATE_AVAILABLE 0
+#define NOUVEAU_FENCE_STATE_EMITTED   1
+#define NOUVEAU_FENCE_STATE_FLUSHED   2
+#define NOUVEAU_FENCE_STATE_SIGNALLED 3
+
+struct nouveau_fence_work {
+   struct list_head list;
+   void (*func)(void *);
+   void *data;
+};
+
+struct nouveau_fence {
+   struct nouveau_fence *next;
+   struct nouveau_screen *screen;
+   int state;
+   int ref;
+   uint32_t sequence;
+   struct list_head work;
+};
+
+void nouveau_fence_emit(struct nouveau_fence *);
+void nouveau_fence_del(struct nouveau_fence *);
+
+boolean nouveau_fence_new(struct nouveau_screen *, struct nouveau_fence **,
+                          boolean emit);
+boolean nouveau_fence_work(struct nouveau_fence *, void (*)(void *), void *);
+void    nouveau_fence_update(struct nouveau_screen *, boolean flushed);
+void    nouveau_fence_next(struct nouveau_screen *);
+boolean nouveau_fence_wait(struct nouveau_fence *);
+boolean nouveau_fence_signalled(struct nouveau_fence *);
+
+static INLINE void
+nouveau_fence_ref(struct nouveau_fence *fence, struct nouveau_fence **ref)
+{
+   if (*ref) {
+      if (--(*ref)->ref == 0)
+         nouveau_fence_del(*ref);
+   }
+   if (fence)
+      ++fence->ref;
+
+   *ref = fence;
+}
+
+static INLINE struct nouveau_fence *
+nouveau_fence(struct pipe_fence_handle *fence)
+{
+   return (struct nouveau_fence *)fence;
+}
+
+#endif // __NOUVEAU_FENCE_H__