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drm/i915: Virtualize the ringbuffer signal func

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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>
This commit is contained in:
Ben Widawsky
2014-04-29 14:52:29 -07:00
committed by Daniel Vetter
parent ebc348b2ad
commit 78325f2d27
2 changed files with 32 additions and 21 deletions
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11
drivers/gpu/drm/i915/intel_ringbuffer.h
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@@ -120,16 +120,19 @@ struct intel_ring_buffer {
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;
/**