drm/i915: unify ring irq refcounts (again)

With the simplified locking there's no reason any more to keep the
refcounts seperate.

v2: Readd the lost comment that ring->irq_refcount is protected by
dev_priv->irq_lock.

Reviewed-by: Ben Widawsky <ben@bwidawsk.net>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.c b/drivers/gpu/drm/i915/intel_ringbuffer.c
index 33a74a8..23ffe1d 100644 (file)
--- a/drivers/gpu/drm/i915/intel_ringbuffer.c
+++ b/drivers/gpu/drm/i915/intel_ringbuffer.c
@@ -821,7 +821,7 @@ gen5_ring_get_irq(struct intel_ring_buffer *ring)
                return false;
 
        spin_lock_irqsave(&dev_priv->irq_lock, flags);
-       if (ring->irq_refcount.gt++ == 0) {
+       if (ring->irq_refcount++ == 0) {
                dev_priv->gt_irq_mask &= ~ring->irq_enable_mask;
                I915_WRITE(GTIMR, dev_priv->gt_irq_mask);
                POSTING_READ(GTIMR);
@@ -839,7 +839,7 @@ gen5_ring_put_irq(struct intel_ring_buffer *ring)
        unsigned long flags;
 
        spin_lock_irqsave(&dev_priv->irq_lock, flags);
-       if (--ring->irq_refcount.gt == 0) {
+       if (--ring->irq_refcount == 0) {
                dev_priv->gt_irq_mask |= ring->irq_enable_mask;
                I915_WRITE(GTIMR, dev_priv->gt_irq_mask);
                POSTING_READ(GTIMR);
@@ -858,7 +858,7 @@ i9xx_ring_get_irq(struct intel_ring_buffer *ring)
                return false;
 
        spin_lock_irqsave(&dev_priv->irq_lock, flags);
-       if (ring->irq_refcount.gt++ == 0) {
+       if (ring->irq_refcount++ == 0) {
                dev_priv->irq_mask &= ~ring->irq_enable_mask;
                I915_WRITE(IMR, dev_priv->irq_mask);
                POSTING_READ(IMR);
@@ -876,7 +876,7 @@ i9xx_ring_put_irq(struct intel_ring_buffer *ring)
        unsigned long flags;
 
        spin_lock_irqsave(&dev_priv->irq_lock, flags);
-       if (--ring->irq_refcount.gt == 0) {
+       if (--ring->irq_refcount == 0) {
                dev_priv->irq_mask |= ring->irq_enable_mask;
                I915_WRITE(IMR, dev_priv->irq_mask);
                POSTING_READ(IMR);
@@ -895,7 +895,7 @@ i8xx_ring_get_irq(struct intel_ring_buffer *ring)
                return false;
 
        spin_lock_irqsave(&dev_priv->irq_lock, flags);
-       if (ring->irq_refcount.gt++ == 0) {
+       if (ring->irq_refcount++ == 0) {
                dev_priv->irq_mask &= ~ring->irq_enable_mask;
                I915_WRITE16(IMR, dev_priv->irq_mask);
                POSTING_READ16(IMR);
@@ -913,7 +913,7 @@ i8xx_ring_put_irq(struct intel_ring_buffer *ring)
        unsigned long flags;
 
        spin_lock_irqsave(&dev_priv->irq_lock, flags);
-       if (--ring->irq_refcount.gt == 0) {
+       if (--ring->irq_refcount == 0) {
                dev_priv->irq_mask |= ring->irq_enable_mask;
                I915_WRITE16(IMR, dev_priv->irq_mask);
                POSTING_READ16(IMR);
@@ -1006,7 +1006,7 @@ gen6_ring_get_irq(struct intel_ring_buffer *ring)
        gen6_gt_force_wake_get(dev_priv);
 
        spin_lock_irqsave(&dev_priv->irq_lock, flags);
-       if (ring->irq_refcount.gt++ == 0) {
+       if (ring->irq_refcount++ == 0) {
                if (HAS_L3_GPU_CACHE(dev) && ring->id == RCS)
                        I915_WRITE_IMR(ring,
                                       ~(ring->irq_enable_mask |
@@ -1030,7 +1030,7 @@ gen6_ring_put_irq(struct intel_ring_buffer *ring)
        unsigned long flags;
 
        spin_lock_irqsave(&dev_priv->irq_lock, flags);
-       if (--ring->irq_refcount.gt == 0) {
+       if (--ring->irq_refcount == 0) {
                if (HAS_L3_GPU_CACHE(dev) && ring->id == RCS)
                        I915_WRITE_IMR(ring,
                                       ~GT_RENDER_L3_PARITY_ERROR_INTERRUPT);
@@ -1056,7 +1056,7 @@ hsw_vebox_get_irq(struct intel_ring_buffer *ring)
                return false;
 
        spin_lock_irqsave(&dev_priv->irq_lock, flags);
-       if (ring->irq_refcount.pm++ == 0) {
+       if (ring->irq_refcount++ == 0) {
                u32 pm_imr = I915_READ(GEN6_PMIMR);
                I915_WRITE_IMR(ring, ~ring->irq_enable_mask);
                I915_WRITE(GEN6_PMIMR, pm_imr & ~ring->irq_enable_mask);
@@ -1078,7 +1078,7 @@ hsw_vebox_put_irq(struct intel_ring_buffer *ring)
                return;
 
        spin_lock_irqsave(&dev_priv->irq_lock, flags);
-       if (--ring->irq_refcount.pm == 0) {
+       if (--ring->irq_refcount == 0) {
                u32 pm_imr = I915_READ(GEN6_PMIMR);
                I915_WRITE_IMR(ring, ~0);
                I915_WRITE(GEN6_PMIMR, pm_imr | ring->irq_enable_mask);

diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.h b/drivers/gpu/drm/i915/intel_ringbuffer.h
index 8a87b3f..6e38256 100644 (file)
--- a/drivers/gpu/drm/i915/intel_ringbuffer.h
+++ b/drivers/gpu/drm/i915/intel_ringbuffer.h
@@ -78,10 +78,7 @@ struct  intel_ring_buffer {
         */
        u32             last_retired_head;
 
-       struct {
-               u32     gt; /*  protected by dev_priv->irq_lock */
-               u32     pm; /*  protected by dev_priv->irq_lock */
-       } irq_refcount;
+       unsigned irq_refcount; /* protected by dev_priv->irq_lock */
        u32             irq_enable_mask;        /* bitmask to enable ring interrupt */
        u32             trace_irq_seqno;
        u32             sync_seqno[I915_NUM_RINGS-1];