[PATCH 22/53] drm/i915: Make ring_space more generic and outside accesible

[oscar.mateo@xxxxxxxxx]

From: Oscar Mateo <oscar.mateo@xxxxxxxxx>

I want to reuse it from the new logical ring code (as it seems
innocent enough).

Signed-off-by: Oscar Mateo <oscar.mateo@xxxxxxxxx>
---
 drivers/gpu/drm/i915/intel_ringbuffer.c | 26 ++++++--------------------
 drivers/gpu/drm/i915/intel_ringbuffer.h | 13 +++++++++++++
 2 files changed, 19 insertions(+), 20 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.c b/drivers/gpu/drm/i915/intel_ringbuffer.c
index 254e4c5..249804c 100644
--- a/drivers/gpu/drm/i915/intel_ringbuffer.c
+++ b/drivers/gpu/drm/i915/intel_ringbuffer.c
@@ -57,20 +57,6 @@ intel_ring_initialized(struct intel_engine_cs *ring)
 		return ring->buffer && ring->buffer->obj;
 }
 
-static inline int __ring_space(int head, int tail, int size)
-{
-	int space = head - (tail + I915_RING_FREE_SPACE);
-	if (space < 0)
-		space += size;
-	return space;
-}
-
-static inline int ring_space(struct intel_engine_cs *ring)
-{
-	struct intel_ringbuffer *ringbuf = ring->buffer;
-	return __ring_space(ringbuf->head & HEAD_ADDR, ringbuf->tail, ringbuf->size);
-}
-
 static bool intel_ring_stopped(struct intel_engine_cs *ring)
 {
 	struct drm_i915_private *dev_priv = ring->dev->dev_private;
@@ -562,7 +548,7 @@ static int init_ring_common(struct intel_engine_cs *ring)
 	else {
 		ringbuf->head = I915_READ_HEAD(ring);
 		ringbuf->tail = I915_READ_TAIL(ring) & TAIL_ADDR;
-		ringbuf->space = ring_space(ring);
+		ringbuf->space = intel_ring_space(ringbuf);
 		ringbuf->last_retired_head = -1;
 	}
 
@@ -1554,13 +1540,13 @@ static int intel_ring_wait_request(struct intel_engine_cs *ring, int n)
 		ringbuf->head = ringbuf->last_retired_head;
 		ringbuf->last_retired_head = -1;
 
-		ringbuf->space = ring_space(ring);
+		ringbuf->space = intel_ring_space(ringbuf);
 		if (ringbuf->space >= n)
 			return 0;
 	}
 
 	list_for_each_entry(request, &ring->request_list, list) {
-		if (__ring_space(request->tail, ringbuf->tail, ringbuf->size) >= n) {
+		if (__intel_ring_space(request->tail, ringbuf->tail, ringbuf->size) >= n) {
 			seqno = request->seqno;
 			break;
 		}
@@ -1577,7 +1563,7 @@ static int intel_ring_wait_request(struct intel_engine_cs *ring, int n)
 	ringbuf->head = ringbuf->last_retired_head;
 	ringbuf->last_retired_head = -1;
 
-	ringbuf->space = ring_space(ring);
+	ringbuf->space = intel_ring_space(ringbuf);
 	return 0;
 }
 
@@ -1606,7 +1592,7 @@ static int ring_wait_for_space(struct intel_engine_cs *ring, int n)
 	trace_i915_ring_wait_begin(ring);
 	do {
 		ringbuf->head = I915_READ_HEAD(ring);
-		ringbuf->space = ring_space(ring);
+		ringbuf->space = intel_ring_space(ringbuf);
 		if (ringbuf->space >= n) {
 			ret = 0;
 			break;
@@ -1658,7 +1644,7 @@ static int intel_wrap_ring_buffer(struct intel_engine_cs *ring)
 		iowrite32(MI_NOOP, virt++);
 
 	ringbuf->tail = 0;
-	ringbuf->space = ring_space(ring);
+	ringbuf->space = intel_ring_space(ringbuf);
 
 	return 0;
 }
diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.h b/drivers/gpu/drm/i915/intel_ringbuffer.h
index 42026a1..dc944fe 100644
--- a/drivers/gpu/drm/i915/intel_ringbuffer.h
+++ b/drivers/gpu/drm/i915/intel_ringbuffer.h
@@ -224,6 +224,19 @@ bool intel_ring_initialized(struct intel_engine_cs *ring);
 void intel_fini_pipe_control(struct intel_engine_cs *ring);
 int intel_init_pipe_control(struct intel_engine_cs *ring);
 
+static inline int __intel_ring_space(int head, int tail, int size)
+{
+	int space = head - (tail + I915_RING_FREE_SPACE);
+	if (space < 0)
+		space += size;
+	return space;
+}
+
+static inline int intel_ring_space(struct intel_ringbuffer *ringbuf)
+{
+	return __intel_ring_space(ringbuf->head & HEAD_ADDR, ringbuf->tail, ringbuf->size);
+}
+
 static inline unsigned
 intel_ring_flag(struct intel_engine_cs *ring)
 {
-- 
1.9.0

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