Add an additional comparison to check the entire vma created in the mappable
region of the global GTT against the one in the unmappable range.
Further test with an assert_partial as well to ensure the VMA corresponds
to the original object's backing store.
Signed-off-by: Abdiel Janulgue <abdiel.janul...@linux.intel.com>
Cc: Joonas Lahtinen <joonas.lahti...@linux.intel.com>
Cc: Chris Wilson <ch...@chris-wilson.co.uk>
---
drivers/gpu/drm/i915/selftests/i915_vma.c | 44 ++++++++++++++++++++++++++++++-
1 file changed, 43 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/i915/selftests/i915_vma.c
b/drivers/gpu/drm/i915/selftests/i915_vma.c
index ea48bac..10cf4df 100644
--- a/drivers/gpu/drm/i915/selftests/i915_vma.c
+++ b/drivers/gpu/drm/i915/selftests/i915_vma.c
@@ -554,6 +554,30 @@ static bool assert_partial(struct drm_i915_gem_object *obj,
return true;
}
+static bool assert_vma_compare(struct i915_vma *vma1, struct i915_vma *vma2)
+{
+ struct sgt_iter sgt;
+ dma_addr_t dma;
+ unsigned long offset = 0;
+
+ for_each_sgt_dma(dma, sgt, vma1->pages) {
+ dma_addr_t src;
+
+ src = sg_dma_address(vma2->pages->sgl) +
+ (offset << PAGE_SHIFT);
+
+ if (src != dma) {
+ pr_err("VMA comparison failed. DMA mismatch for partial
"
+ "page offset %lu\n", offset);
+ return false;
+ }
+
+ offset++;
+ }
+
+ return true;
+}
+
static bool assert_pin(struct i915_vma *vma,
struct i915_ggtt_view *view,
u64 size,
@@ -621,7 +645,7 @@ static int igt_vma_partial(void *arg)
{ },
}, *p;
unsigned int sz, offset;
- struct i915_vma *vma;
+ struct i915_vma *vma, *vma_unmapped = NULL;
int err = -ENOMEM;
/*
@@ -660,6 +684,8 @@ static int igt_vma_partial(void *arg)
err = i915_vma_pin(vma, 0, 0, PIN_GLOBAL | PIN_HIGH);
if (err)
goto out_object;
+
+ vma_unmapped = vma;
}
nvma = 0;
@@ -748,6 +774,22 @@ static int igt_vma_partial(void *arg)
goto out_object;
}
+ if (!assert_partial(obj, vma, 0, npages)) {
+ pr_err("(%s) Inconsistent partial pages for
(offset=%d, size=%d)\n",
+ p->name, offset, sz);
+ err = -EINVAL;
+ goto out_object;
+ }
+
+ if (vma_unmapped) {
+ if (!assert_vma_compare(vma, vma_unmapped)) {
+ pr_err("(%s) Inconsistent vma from
unmapped region\n",
+ p->name);
+ err = -EINVAL;
+ goto out_object;
+ }
+ }
+
i915_vma_unpin(vma);
}
}
--
2.7.4
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