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Signed-off-by: Ben Widawsky <b...@bwidawsk.net>
---
drivers/gpu/drm/i915/i915_gem_gtt.c | 31 +++++++++++++++++++++++++++++++
1 file changed, 31 insertions(+)
diff --git a/drivers/gpu/drm/i915/i915_gem_gtt.c
b/drivers/gpu/drm/i915/i915_gem_gtt.c
index 893007a..005358f 100644
--- a/drivers/gpu/drm/i915/i915_gem_gtt.c
+++ b/drivers/gpu/drm/i915/i915_gem_gtt.c
@@ -99,6 +99,37 @@ static gen6_gtt_pte_t hsw_pte_encode(dma_addr_t addr,
return pte;
}
+void gen6_dump_ppgtt(struct i915_hw_ppgtt *ppgtt)
+{
+ struct drm_i915_private *dev_priv = ppgtt->base.dev->dev_private;
+ gen6_gtt_pte_t __iomem *pd_addr;
+ uint32_t pd_entry;
+ int i, j;
+
+ pd_addr = (gen6_gtt_pte_t __iomem*)dev_priv->gtt.gsm +
+ ppgtt->pd_offset / sizeof(gen6_gtt_pte_t);
+
+ for (i = 0; i < ppgtt->num_pd_entries; i++) {
+ gen6_gtt_pte_t *pt_vaddr;
+ dma_addr_t pt_addr = ppgtt->pt_dma_addr[i];
+ pd_entry = readl(pd_addr + i);
+
+ if (pd_entry != (u32)(GEN6_PDE_ADDR_ENCODE(pt_addr) |
GEN6_PDE_VALID))
+ DRM_ERROR("Actual PDE: %x Expected PDE: %x",
+ pd_entry,
+ (u32)(GEN6_PDE_ADDR_ENCODE(pt_addr) |
GEN6_PDE_VALID));
+
+ pt_vaddr = kmap_atomic(ppgtt->pt_pages[i]);
+ for (j = 0; j < I915_PPGTT_PT_ENTRIES; j++) {
+ gen6_gtt_pte_t scratch_pte =
+ ppgtt->base.pte_encode(ppgtt->base.scratch.addr,
+ I915_CACHE_LLC);
+ if (pt_vaddr[j] != scratch_pte)
+ DRM_ERROR("\tPTE = %x (%d %d)", pt_vaddr[j],
i,j);
+ }
+ kunmap_atomic(pt_vaddr);
+ }
+}
static void gen6_write_pdes(struct i915_hw_ppgtt *ppgtt)
{
--
1.8.3.1
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