drm/i915: Initialize RCS ring status page address in intel_render_ring_init_dri

commit f3234706a77bd6e1592ae71fb3268e04cb030dba upstream.

Physically-addressed hardware status pages are initialized early in
the driver load process by i915_init_phys_hws. For UMS environments,
the ring structure is not initialized until the X server starts. At
that point, the entire ring structure is re-initialized with all new
values. Any values set in the ring structure (including
ring->status_page.page_addr) will be lost when the ring is
re-initialized.

This patch moves the initialization of the status_page.page_addr value
to intel_render_ring_init_dri.

Signed-off-by: Keith Packard <keithp@keithp.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/drivers/gpu/drm/i915/i915_dma.c b/drivers/gpu/drm/i915/i915_dma.c
index 296fbd6..7eef6e1 100644 (file)
--- a/drivers/gpu/drm/i915/i915_dma.c
+++ b/drivers/gpu/drm/i915/i915_dma.c
@@ -61,7 +61,6 @@ static void i915_write_hws_pga(struct drm_device *dev)
 static int i915_init_phys_hws(struct drm_device *dev)
 {
        drm_i915_private_t *dev_priv = dev->dev_private;
-       struct intel_ring_buffer *ring = LP_RING(dev_priv);
 
        /* Program Hardware Status Page */
        dev_priv->status_page_dmah =
@@ -71,10 +70,9 @@ static int i915_init_phys_hws(struct drm_device *dev)
                DRM_ERROR("Can not allocate hardware status page\n");
                return -ENOMEM;
        }
-       ring->status_page.page_addr =
-               (void __force __iomem *)dev_priv->status_page_dmah->vaddr;
 
-       memset_io(ring->status_page.page_addr, 0, PAGE_SIZE);
+       memset_io((void __force __iomem *)dev_priv->status_page_dmah->vaddr,
+                 0, PAGE_SIZE);
 
        i915_write_hws_pga(dev);
 

diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.c b/drivers/gpu/drm/i915/intel_ringbuffer.c
index 95c4b14..1f61fc7 100644 (file)
--- a/drivers/gpu/drm/i915/intel_ringbuffer.c
+++ b/drivers/gpu/drm/i915/intel_ringbuffer.c
@@ -1319,6 +1319,9 @@ int intel_render_ring_init_dri(struct drm_device *dev, u64 start, u32 size)
                ring->get_seqno = pc_render_get_seqno;
        }
 
+       if (!I915_NEED_GFX_HWS(dev))
+               ring->status_page.page_addr = dev_priv->status_page_dmah->vaddr;
+
        ring->dev = dev;
        INIT_LIST_HEAD(&ring->active_list);
        INIT_LIST_HEAD(&ring->request_list);