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Assisted-by: Claude:claude-5-sonnet Signed-off-by: Piotr Piórkowski --- drivers/gpu/drm/xe/tests/xe_vram.c | 118 +++++++++++++++++++++++++++++ drivers/gpu/drm/xe/xe_vram.c | 4 + 2 files changed, 122 insertions(+) create mode 100644 drivers/gpu/drm/xe/tests/xe_vram.c diff --git a/drivers/gpu/drm/xe/tests/xe_vram.c b/drivers/gpu/drm/xe/tests/xe_vram.c new file mode 100644 index 000000000000..98787a1221cc --- /dev/null +++ b/drivers/gpu/drm/xe/tests/xe_vram.c @@ -0,0 +1,118 @@ +// SPDX-License-Identifier: GPL-2.0 AND MIT +/* + * Copyright © 2026 Intel Corporation + */ + +#include + +#include "xe_kunit_helpers.h" +#include "xe_pci_test.h" + +static int xe_vram_test_init(struct kunit *test) +{ + struct xe_pci_fake_data fake = { + .platform = XE_BATTLEMAGE, + .graphics_verx100 = 2001, + }; + + test->priv = &fake; + xe_kunit_helper_xe_device_test_init(test); + + return 0; +} + +static struct xe_vram_region pfmem_parent(struct xe_device *xe, u64 io_size) +{ + struct xe_vram_region parent = { + .xe = xe, + .id = 0, + .io_start = SZ_1G, + .io_size = io_size, + .dpa_base = SZ_2G, + .mapping = (__force void __iomem *)SZ_64K, + .usable_size = SZ_64M, + }; + + return parent; +} + +static void pfmem_create(struct kunit *test) +{ + struct xe_device *xe = test->priv; + struct xe_vram_region parent = pfmem_parent(xe, SZ_64M); + struct xe_vram_region *vram; + + vram = xe_vram_region_alloc_pfmem(xe, 0); + KUNIT_ASSERT_NOT_NULL(test, vram); + KUNIT_ASSERT_EQ(test, xe_vram_region_init_pfmem(vram, &parent, SZ_4M, SZ_16M), 0); + KUNIT_EXPECT_EQ(test, vram->binding, XE_VRAM_BINDING_PFMEM); + KUNIT_EXPECT_EQ(test, vram->placement, (u32)XE_PL_VRAM0_PFMEM); + KUNIT_EXPECT_EQ(test, vram->id, (u8)0); + KUNIT_EXPECT_EQ(test, vram->actual_physical_size, (resource_size_t)SZ_16M); + KUNIT_EXPECT_EQ(test, vram->usable_size, (resource_size_t)SZ_16M); + KUNIT_EXPECT_EQ(test, vram->io_start, (resource_size_t)(SZ_1G + SZ_4M)); + KUNIT_EXPECT_EQ(test, vram->io_size, (resource_size_t)SZ_16M); + KUNIT_EXPECT_EQ(test, vram->dpa_base, (resource_size_t)(SZ_2G + SZ_4M)); + KUNIT_EXPECT_PTR_EQ(test, vram->mapping, parent.mapping + SZ_4M); +} + +static void pfmem_small_bar(struct kunit *test) +{ + struct xe_device *xe = test->priv; + struct xe_vram_region parent = pfmem_parent(xe, SZ_8M); + struct xe_vram_region *vram; + + vram = xe_vram_region_alloc_pfmem(xe, 0); + KUNIT_ASSERT_NOT_NULL(test, vram); + KUNIT_ASSERT_EQ(test, xe_vram_region_init_pfmem(vram, &parent, SZ_4M, SZ_16M), 0); + KUNIT_EXPECT_EQ(test, vram->io_size, (resource_size_t)SZ_4M); + + vram = xe_vram_region_alloc_pfmem(xe, 0); + KUNIT_ASSERT_NOT_NULL(test, vram); + KUNIT_EXPECT_EQ(test, xe_vram_region_init_pfmem(vram, &parent, SZ_8M, SZ_16M), -EINVAL); +} + +static void pfmem_invalid_range(struct kunit *test) +{ + struct xe_device *xe = test->priv; + struct xe_vram_region parent = pfmem_parent(xe, SZ_64M); + struct xe_vram_region *vram; + + vram = xe_vram_region_alloc_pfmem(xe, 0); + KUNIT_ASSERT_NOT_NULL(test, vram); + KUNIT_EXPECT_EQ(test, xe_vram_region_init_pfmem(vram, &parent, 0, 0), -EINVAL); + KUNIT_EXPECT_EQ(test, xe_vram_region_init_pfmem(vram, &parent, SZ_4M + 1, SZ_4M), -EINVAL); + KUNIT_EXPECT_EQ(test, xe_vram_region_init_pfmem(vram, &parent, SZ_4M, SZ_4M + 1), -EINVAL); + KUNIT_EXPECT_EQ(test, xe_vram_region_init_pfmem(vram, &parent, SZ_64M + SZ_4M, SZ_4M), + -EINVAL); + KUNIT_EXPECT_EQ(test, xe_vram_region_init_pfmem(vram, &parent, SZ_64M - SZ_4M, SZ_8M), + -EINVAL); + KUNIT_EXPECT_EQ(test, xe_vram_region_init_pfmem(vram, &parent, SZ_64M, SZ_4M), -EINVAL); +} + +static void pfmem_no_io(struct kunit *test) +{ + struct xe_device *xe = test->priv; + struct xe_vram_region parent = pfmem_parent(xe, 0); + struct xe_vram_region *vram; + + vram = xe_vram_region_alloc_pfmem(xe, 0); + KUNIT_ASSERT_NOT_NULL(test, vram); + KUNIT_EXPECT_EQ(test, xe_vram_region_init_pfmem(vram, &parent, 0, SZ_4M), -EINVAL); +} + +static struct kunit_case xe_vram_tests[] = { + KUNIT_CASE(pfmem_create), + KUNIT_CASE(pfmem_small_bar), + KUNIT_CASE(pfmem_invalid_range), + KUNIT_CASE(pfmem_no_io), + {} +}; + +static struct kunit_suite xe_vram_test_suite = { + .name = "xe_vram", + .test_cases = xe_vram_tests, + .init = xe_vram_test_init, +}; + +kunit_test_suite(xe_vram_test_suite); diff --git a/drivers/gpu/drm/xe/xe_vram.c b/drivers/gpu/drm/xe/xe_vram.c index 61fb4a543cb0..2fa809831662 100644 --- a/drivers/gpu/drm/xe/xe_vram.c +++ b/drivers/gpu/drm/xe/xe_vram.c @@ -483,3 +483,7 @@ resource_size_t xe_vram_region_actual_physical_size(const struct xe_vram_region return vram ? vram->actual_physical_size : 0; } EXPORT_SYMBOL_IF_KUNIT(xe_vram_region_actual_physical_size); + +#if IS_ENABLED(CONFIG_DRM_XE_KUNIT_TEST) +#include "tests/xe_vram.c" +#endif -- 2.34.1