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>

2 files changed, 27 insertions, 3 deletions

diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 8f70fb65b496..f1bc0fb6a72c 100644
--- 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 12c168f0cb77..3971b5e6ad60 100644
--- 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);
 }