drm/i915: abstract away ring-specific irq_get/put

Inspired by Ben Widawsky's patch for gen6+. Now after restructuring
how we set up the ring vtables and parameters, we can do this right.

This kills the bsd specific get/put_irq functions, they're now the
same.

Reviewed-by: Eric Anholt <eric@anholt.net>
Signed-Off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

drivers/gpu/drm/i915/intel_ringbuffer.c

@@ -645,7 +645,7 @@ i915_disable_irq(drm_i915_private_t *dev_priv, u32 mask)
 }
 
 static bool
-render_ring_get_irq(struct intel_ring_buffer *ring)
+i9xx_ring_get_irq(struct intel_ring_buffer *ring)
 {
 	struct drm_device *dev = ring->dev;
 	drm_i915_private_t *dev_priv = dev->dev_private;
@@ -657,9 +657,9 @@ render_ring_get_irq(struct intel_ring_buffer *ring)
 	if (ring->irq_refcount++ == 0) {
 		if (INTEL_INFO(dev)->gen >= 5)
 			ironlake_enable_irq(dev_priv,
-					    GT_PIPE_NOTIFY | GT_USER_INTERRUPT);
+					    ring->irq_enable_mask);
 		else
-			i915_enable_irq(dev_priv, I915_USER_INTERRUPT);
+			i915_enable_irq(dev_priv, ring->irq_enable_mask);
 	}
 	spin_unlock(&ring->irq_lock);
 
@@ -667,7 +667,7 @@ render_ring_get_irq(struct intel_ring_buffer *ring)
 }
 
 static void
-render_ring_put_irq(struct intel_ring_buffer *ring)
+i9xx_ring_put_irq(struct intel_ring_buffer *ring)
 {
 	struct drm_device *dev = ring->dev;
 	drm_i915_private_t *dev_priv = dev->dev_private;
@@ -676,10 +676,9 @@ render_ring_put_irq(struct intel_ring_buffer *ring)
 	if (--ring->irq_refcount == 0) {
 		if (INTEL_INFO(dev)->gen >= 5)
 			ironlake_disable_irq(dev_priv,
-					     GT_USER_INTERRUPT |
-					     GT_PIPE_NOTIFY);
+					     ring->irq_enable_mask);
 		else
-			i915_disable_irq(dev_priv, I915_USER_INTERRUPT);
+			i915_disable_irq(dev_priv, ring->irq_enable_mask);
 	}
 	spin_unlock(&ring->irq_lock);
 }
@@ -795,42 +794,6 @@ gen6_ring_put_irq(struct intel_ring_buffer *ring)
 	gen6_gt_force_wake_put(dev_priv);
 }
 
-static bool
-bsd_ring_get_irq(struct intel_ring_buffer *ring)
-{
-	struct drm_device *dev = ring->dev;
-	drm_i915_private_t *dev_priv = dev->dev_private;
-
-	if (!dev->irq_enabled)
-		return false;
-
-	spin_lock(&ring->irq_lock);
-	if (ring->irq_refcount++ == 0) {
-		if (IS_G4X(dev))
-			i915_enable_irq(dev_priv, I915_BSD_USER_INTERRUPT);
-		else
-			ironlake_enable_irq(dev_priv, GT_BSD_USER_INTERRUPT);
-	}
-	spin_unlock(&ring->irq_lock);
-
-	return true;
-}
-static void
-bsd_ring_put_irq(struct intel_ring_buffer *ring)
-{
-	struct drm_device *dev = ring->dev;
-	drm_i915_private_t *dev_priv = dev->dev_private;
-
-	spin_lock(&ring->irq_lock);
-	if (--ring->irq_refcount == 0) {
-		if (IS_G4X(dev))
-			i915_disable_irq(dev_priv, I915_BSD_USER_INTERRUPT);
-		else
-			ironlake_disable_irq(dev_priv, GT_BSD_USER_INTERRUPT);
-	}
-	spin_unlock(&ring->irq_lock);
-}
-
 static int
 ring_dispatch_execbuffer(struct intel_ring_buffer *ring, u32 offset, u32 length)
 {
@@ -1338,14 +1301,16 @@ int intel_init_render_ring_buffer(struct drm_device *dev)
 		ring->add_request = pc_render_add_request;
 		ring->flush = render_ring_flush;
 		ring->get_seqno = pc_render_get_seqno;
-		ring->irq_get = render_ring_get_irq;
-		ring->irq_put = render_ring_put_irq;
+		ring->irq_get = i9xx_ring_get_irq;
+		ring->irq_put = i9xx_ring_put_irq;
+		ring->irq_enable_mask = GT_USER_INTERRUPT | GT_PIPE_NOTIFY;
 	} else {
 		ring->add_request = render_ring_add_request;
 		ring->flush = render_ring_flush;
 		ring->get_seqno = ring_get_seqno;
-		ring->irq_get = render_ring_get_irq;
-		ring->irq_put = render_ring_put_irq;
+		ring->irq_get = i9xx_ring_get_irq;
+		ring->irq_put = i9xx_ring_put_irq;
+		ring->irq_enable_mask = I915_USER_INTERRUPT;
 	}
 	ring->write_tail = ring_write_tail;
 	ring->dispatch_execbuffer = render_ring_dispatch_execbuffer;
@@ -1377,14 +1342,16 @@ int intel_render_ring_init_dri(struct drm_device *dev, u64 start, u32 size)
 		ring->add_request = pc_render_add_request;
 		ring->flush = render_ring_flush;
 		ring->get_seqno = pc_render_get_seqno;
-		ring->irq_get = render_ring_get_irq;
-		ring->irq_put = render_ring_put_irq;
+		ring->irq_get = i9xx_ring_get_irq;
+		ring->irq_put = i9xx_ring_put_irq;
+		ring->irq_enable_mask = GT_USER_INTERRUPT | GT_PIPE_NOTIFY;
 	} else {
 		ring->add_request = render_ring_add_request;
 		ring->flush = render_ring_flush;
 		ring->get_seqno = ring_get_seqno;
-		ring->irq_get = render_ring_get_irq;
-		ring->irq_put = render_ring_put_irq;
+		ring->irq_get = i9xx_ring_get_irq;
+		ring->irq_put = i9xx_ring_put_irq;
+		ring->irq_enable_mask = I915_USER_INTERRUPT;
 	}
 	ring->write_tail = ring_write_tail;
 	ring->dispatch_execbuffer = render_ring_dispatch_execbuffer;
@@ -1451,8 +1418,12 @@ int intel_init_bsd_ring_buffer(struct drm_device *dev)
 		ring->flush = bsd_ring_flush;
 		ring->add_request = ring_add_request;
 		ring->get_seqno = ring_get_seqno;
-		ring->irq_get = bsd_ring_get_irq;
-		ring->irq_put = bsd_ring_put_irq;
+		ring->irq_get = i9xx_ring_get_irq;
+		ring->irq_put = i9xx_ring_put_irq;
+		if (IS_GEN5(dev))
+			ring->irq_enable_mask = GT_BSD_USER_INTERRUPT;
+		else
+			ring->irq_enable_mask = I915_BSD_USER_INTERRUPT;
 		ring->dispatch_execbuffer = ring_dispatch_execbuffer;
 	}
 	ring->init = init_ring_common;