Merge drm/drm-next into drm-misc-next

Daniel needs -rc2 in drm-misc-next to merge some patches

Signed-off-by: Maxime Ripard <maxime@cerno.tech>

3 files changed, 83 insertions, 8 deletions

diff --git a/drivers/gpu/drm/i915/selftests/intel_memory_region.c b/drivers/gpu/drm/i915/selftests/intel_memory_region.c
index 334b0648e253..0aeba8e3af28 100644
--- a/drivers/gpu/drm/i915/selftests/intel_memory_region.c
+++ b/drivers/gpu/drm/i915/selftests/intel_memory_region.c
@@ -261,6 +261,82 @@ err_close_objects:
 	return err;
 }
 
+static int igt_mock_splintered_region(void *arg)
+{
+	struct intel_memory_region *mem = arg;
+	struct drm_i915_private *i915 = mem->i915;
+	struct drm_i915_gem_object *obj;
+	unsigned int expected_order;
+	LIST_HEAD(objects);
+	u64 size;
+	int err = 0;
+
+	/*
+	 * Sanity check we can still allocate everything even if the
+	 * mm.max_order != mm.size. i.e our starting address space size is not a
+	 * power-of-two.
+	 */
+
+	size = (SZ_4G - 1) & PAGE_MASK;
+	mem = mock_region_create(i915, 0, size, PAGE_SIZE, 0);
+	if (IS_ERR(mem))
+		return PTR_ERR(mem);
+
+	if (mem->mm.size != size) {
+		pr_err("%s size mismatch(%llu != %llu)\n",
+		       __func__, mem->mm.size, size);
+		err = -EINVAL;
+		goto out_put;
+	}
+
+	expected_order = get_order(rounddown_pow_of_two(size));
+	if (mem->mm.max_order != expected_order) {
+		pr_err("%s order mismatch(%u != %u)\n",
+		       __func__, mem->mm.max_order, expected_order);
+		err = -EINVAL;
+		goto out_put;
+	}
+
+	obj = igt_object_create(mem, &objects, size, 0);
+	if (IS_ERR(obj)) {
+		err = PTR_ERR(obj);
+		goto out_close;
+	}
+
+	close_objects(mem, &objects);
+
+	/*
+	 * While we should be able allocate everything without any flag
+	 * restrictions, if we consider I915_BO_ALLOC_CONTIGUOUS then we are
+	 * actually limited to the largest power-of-two for the region size i.e
+	 * max_order, due to the inner workings of the buddy allocator. So make
+	 * sure that does indeed hold true.
+	 */
+
+	obj = igt_object_create(mem, &objects, size, I915_BO_ALLOC_CONTIGUOUS);
+	if (!IS_ERR(obj)) {
+		pr_err("%s too large contiguous allocation was not rejected\n",
+		       __func__);
+		err = -EINVAL;
+		goto out_close;
+	}
+
+	obj = igt_object_create(mem, &objects, rounddown_pow_of_two(size),
+				I915_BO_ALLOC_CONTIGUOUS);
+	if (IS_ERR(obj)) {
+		pr_err("%s largest possible contiguous allocation failed\n",
+		       __func__);
+		err = PTR_ERR(obj);
+		goto out_close;
+	}
+
+out_close:
+	close_objects(mem, &objects);
+out_put:
+	intel_memory_region_put(mem);
+	return err;
+}
+
 static int igt_gpu_write_dw(struct intel_context *ce,
 			    struct i915_vma *vma,
 			    u32 dword,
@@ -771,6 +847,7 @@ int intel_memory_region_mock_selftests(void)
 	static const struct i915_subtest tests[] = {
 		SUBTEST(igt_mock_fill),
 		SUBTEST(igt_mock_contiguous),
+		SUBTEST(igt_mock_splintered_region),
 	};
 	struct intel_memory_region *mem;
 	struct drm_i915_private *i915;
diff --git a/drivers/gpu/drm/i915/selftests/mock_gem_device.c b/drivers/gpu/drm/i915/selftests/mock_gem_device.c
index cf81ba84ae0b..9220c9d1a4b7 100644
--- a/drivers/gpu/drm/i915/selftests/mock_gem_device.c
+++ b/drivers/gpu/drm/i915/selftests/mock_gem_device.c
@@ -113,11 +113,11 @@ static struct dev_pm_domain pm_domain = {
 
 struct drm_i915_private *mock_gem_device(void)
 {
-	struct drm_i915_private *i915;
-	struct pci_dev *pdev;
 #if IS_ENABLED(CONFIG_IOMMU_API) && defined(CONFIG_INTEL_IOMMU)
-	struct dev_iommu iommu;
+	static struct dev_iommu fake_iommu = { .priv = (void *)-1 };
 #endif
+	struct drm_i915_private *i915;
+	struct pci_dev *pdev;
 
 	pdev = kzalloc(sizeof(*pdev), GFP_KERNEL);
 	if (!pdev)
@@ -129,10 +129,8 @@ struct drm_i915_private *mock_gem_device(void)
 	dma_coerce_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
 
 #if IS_ENABLED(CONFIG_IOMMU_API) && defined(CONFIG_INTEL_IOMMU)
-	/* HACK HACK HACK to disable iommu for the fake device; force identity mapping */
-	memset(&iommu, 0, sizeof(iommu));
-	iommu.priv = (void *)-1;
-	pdev->dev.iommu = &iommu;
+	/* HACK to disable iommu for the fake device; force identity mapping */
+	pdev->dev.iommu = &fake_iommu;
 #endif
 	if (!devres_open_group(&pdev->dev, NULL, GFP_KERNEL)) {
 		put_device(&pdev->dev);
diff --git a/drivers/gpu/drm/i915/selftests/mock_region.c b/drivers/gpu/drm/i915/selftests/mock_region.c
index 09660f5a0a4c..979d96f27c43 100644
--- a/drivers/gpu/drm/i915/selftests/mock_region.c
+++ b/drivers/gpu/drm/i915/selftests/mock_region.c
@@ -24,7 +24,7 @@ mock_object_create(struct intel_memory_region *mem,
 	struct drm_i915_private *i915 = mem->i915;
 	struct drm_i915_gem_object *obj;
 
-	if (size > BIT(mem->mm.max_order) * mem->mm.chunk_size)
+	if (size > mem->mm.size)
 		return ERR_PTR(-E2BIG);
 
 	obj = i915_gem_object_alloc();