drm/i915: Virtualize the ringbuffer signal func
This abstraction again is in preparation for gen8. Gen8 will bring new
semantics for doing this operation.
While here, make the writes of MI_NOOPs explicit for non-existent rings.
This should have been implicit before.
NOTE: This is going to be removed in a few patches.
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.h b/drivers/gpu/drm/i915/intel_ringbuffer.h
index 6a44a64..830ff26 100644
--- a/drivers/gpu/drm/i915/intel_ringbuffer.h
+++ b/drivers/gpu/drm/i915/intel_ringbuffer.h
@@ -120,16 +120,19 @@
struct {
u32 sync_seqno[I915_NUM_RINGS-1];
- /* AKA wait() */
- int (*sync_to)(struct intel_ring_buffer *ring,
- struct intel_ring_buffer *to,
- u32 seqno);
+
struct {
/* our mbox written by others */
u32 wait[I915_NUM_RINGS];
/* mboxes this ring signals to */
u32 signal[I915_NUM_RINGS];
} mbox;
+
+ /* AKA wait() */
+ int (*sync_to)(struct intel_ring_buffer *ring,
+ struct intel_ring_buffer *to,
+ u32 seqno);
+ void (*signal)(struct intel_ring_buffer *signaller);
} semaphore;
/**