drm/i915: Update the location of the ringbuffers' HWS_PGA registers for IVB.

They have been moved from the ringbuffer groups to their own group it
looks like.  Fixes GPU hangs on gnome startup.

Signed-off-by: Eric Anholt <eric@anholt.net>
Reviewed-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Keith Packard <keithp@keithp.com>

diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 8f70fb6..f1bc0fb 100644 (file)
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -291,6 +291,9 @@
 #define RING_MAX_IDLE(base)    ((base)+0x54)
 #define RING_HWS_PGA(base)     ((base)+0x80)
 #define RING_HWS_PGA_GEN6(base)        ((base)+0x2080)
+#define RENDER_HWS_PGA_GEN7    (0x04080)
+#define BSD_HWS_PGA_GEN7       (0x04180)
+#define BLT_HWS_PGA_GEN7       (0x04280)
 #define RING_ACTHD(base)       ((base)+0x74)
 #define RING_NOPID(base)       ((base)+0x94)
 #define RING_IMR(base)         ((base)+0xa8)

diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.c b/drivers/gpu/drm/i915/intel_ringbuffer.c
index 12c168f..3971b5e 100644 (file)
--- a/drivers/gpu/drm/i915/intel_ringbuffer.c
+++ b/drivers/gpu/drm/i915/intel_ringbuffer.c
@@ -551,10 +551,31 @@ render_ring_put_irq(struct intel_ring_buffer *ring)
 
 void intel_ring_setup_status_page(struct intel_ring_buffer *ring)
 {
+       struct drm_device *dev = ring->dev;
        drm_i915_private_t *dev_priv = ring->dev->dev_private;
-       u32 mmio = (IS_GEN6(ring->dev) || IS_GEN7(ring->dev)) ?
-               RING_HWS_PGA_GEN6(ring->mmio_base) :
-               RING_HWS_PGA(ring->mmio_base);
+       u32 mmio = 0;
+
+       /* The ring status page addresses are no longer next to the rest of
+        * the ring registers as of gen7.
+        */
+       if (IS_GEN7(dev)) {
+               switch (ring->id) {
+               case RING_RENDER:
+                       mmio = RENDER_HWS_PGA_GEN7;
+                       break;
+               case RING_BLT:
+                       mmio = BLT_HWS_PGA_GEN7;
+                       break;
+               case RING_BSD:
+                       mmio = BSD_HWS_PGA_GEN7;
+                       break;
+               }
+       } else if (IS_GEN6(ring->dev)) {
+               mmio = RING_HWS_PGA_GEN6(ring->mmio_base);
+       } else {
+               mmio = RING_HWS_PGA(ring->mmio_base);
+       }
+
        I915_WRITE(mmio, (u32)ring->status_page.gfx_addr);
        POSTING_READ(mmio);
 }