add test to check handling of misaligned offsets and sizes
v4: * remove spurious blank lines * explicitly cast intel_region_id to intel_memory_type in misaligned_pin Reported-by: kernel test robot lkp@intel.com v6: * use NEEDS_COMPACT_PT instead of hard coding for DG2 v7: * use i915_vma_unbind_unlocked in misalignment test v8: * handle stolen smem region returning -ENODEV due to uninitialized on some setups * avoid trying to test bad alignments on single page hole regions
Signed-off-by: Robert Beckett bob.beckett@collabora.com Reviewed-by: Thomas Hellström thomas.hellstrom@linux.intel.com --- drivers/gpu/drm/i915/selftests/i915_gem_gtt.c | 126 ++++++++++++++++++ 1 file changed, 126 insertions(+)
diff --git a/drivers/gpu/drm/i915/selftests/i915_gem_gtt.c b/drivers/gpu/drm/i915/selftests/i915_gem_gtt.c index b80788a2b7f9..4de86e0f33e4 100644 --- a/drivers/gpu/drm/i915/selftests/i915_gem_gtt.c +++ b/drivers/gpu/drm/i915/selftests/i915_gem_gtt.c @@ -22,10 +22,12 @@ * */
+#include "gt/intel_gtt.h" #include <linux/list_sort.h> #include <linux/prime_numbers.h>
#include "gem/i915_gem_context.h" +#include "gem/i915_gem_region.h" #include "gem/selftests/mock_context.h" #include "gt/intel_context.h" #include "gt/intel_gpu_commands.h" @@ -1067,6 +1069,118 @@ static int shrink_boom(struct i915_address_space *vm, return err; }
+static int misaligned_case(struct i915_address_space *vm, struct intel_memory_region *mr, + u64 addr, u64 size, unsigned long flags) +{ + struct drm_i915_gem_object *obj; + struct i915_vma *vma; + int err = 0; + u64 expected_vma_size, expected_node_size; + bool is_stolen = mr->type == INTEL_MEMORY_STOLEN_SYSTEM || + mr->type == INTEL_MEMORY_STOLEN_LOCAL; + + obj = i915_gem_object_create_region(mr, size, 0, 0); + if (IS_ERR(obj)) { + /* if iGVT-g or DMAR is active, stolen mem will be uninitialized */ + if (PTR_ERR(obj) == -ENODEV && is_stolen) + return 0; + return PTR_ERR(obj); + } + + vma = i915_vma_instance(obj, vm, NULL); + if (IS_ERR(vma)) { + err = PTR_ERR(vma); + goto err_put; + } + + err = i915_vma_pin(vma, 0, 0, addr | flags); + if (err) + goto err_put; + i915_vma_unpin(vma); + + if (!drm_mm_node_allocated(&vma->node)) { + err = -EINVAL; + goto err_put; + } + + if (i915_vma_misplaced(vma, 0, 0, addr | flags)) { + err = -EINVAL; + goto err_put; + } + + expected_vma_size = round_up(size, 1 << (ffs(vma->resource->page_sizes_gtt) - 1)); + expected_node_size = expected_vma_size; + + if (NEEDS_COMPACT_PT(vm->i915) && i915_gem_object_is_lmem(obj)) { + /* compact-pt should expand lmem node to 2MB */ + expected_vma_size = round_up(size, I915_GTT_PAGE_SIZE_64K); + expected_node_size = round_up(size, I915_GTT_PAGE_SIZE_2M); + } + + if (vma->size != expected_vma_size || vma->node.size != expected_node_size) { + err = i915_vma_unbind_unlocked(vma); + err = -EBADSLT; + goto err_put; + } + + err = i915_vma_unbind_unlocked(vma); + if (err) + goto err_put; + + GEM_BUG_ON(drm_mm_node_allocated(&vma->node)); + +err_put: + i915_gem_object_put(obj); + cleanup_freed_objects(vm->i915); + return err; +} + +static int misaligned_pin(struct i915_address_space *vm, + u64 hole_start, u64 hole_end, + unsigned long end_time) +{ + struct intel_memory_region *mr; + enum intel_region_id id; + unsigned long flags = PIN_OFFSET_FIXED | PIN_USER; + int err = 0; + u64 hole_size = hole_end - hole_start; + + if (i915_is_ggtt(vm)) + flags |= PIN_GLOBAL; + + for_each_memory_region(mr, vm->i915, id) { + u64 min_alignment = i915_vm_min_alignment(vm, (enum intel_memory_type)id); + u64 size = min_alignment; + u64 addr = round_down(hole_start + (hole_size / 2), min_alignment); + + /* avoid -ENOSPC on very small hole setups */ + if (hole_size < 3 * min_alignment) + continue; + + /* we can't test < 4k alignment due to flags being encoded in lower bits */ + if (min_alignment != I915_GTT_PAGE_SIZE_4K) { + err = misaligned_case(vm, mr, addr + (min_alignment / 2), size, flags); + /* misaligned should error with -EINVAL*/ + if (!err) + err = -EBADSLT; + if (err != -EINVAL) + return err; + } + + /* test for vma->size expansion to min page size */ + err = misaligned_case(vm, mr, addr, PAGE_SIZE, flags); + if (err) + return err; + + /* test for intermediate size not expanding vma->size for large alignments */ + err = misaligned_case(vm, mr, addr, size / 2, flags); + if (err) + return err; + } + + return 0; +} + static int exercise_ppgtt(struct drm_i915_private *dev_priv, int (*func)(struct i915_address_space *vm, u64 hole_start, u64 hole_end, @@ -1136,6 +1250,11 @@ static int igt_ppgtt_shrink_boom(void *arg) return exercise_ppgtt(arg, shrink_boom); }
+static int igt_ppgtt_misaligned_pin(void *arg) +{ + return exercise_ppgtt(arg, misaligned_pin); +} + static int sort_holes(void *priv, const struct list_head *A, const struct list_head *B) { @@ -1208,6 +1327,11 @@ static int igt_ggtt_lowlevel(void *arg) return exercise_ggtt(arg, lowlevel_hole); }
+static int igt_ggtt_misaligned_pin(void *arg) +{ + return exercise_ggtt(arg, misaligned_pin); +} + static int igt_ggtt_page(void *arg) { const unsigned int count = PAGE_SIZE/sizeof(u32); @@ -2180,12 +2304,14 @@ int i915_gem_gtt_live_selftests(struct drm_i915_private *i915) SUBTEST(igt_ppgtt_fill), SUBTEST(igt_ppgtt_shrink), SUBTEST(igt_ppgtt_shrink_boom), + SUBTEST(igt_ppgtt_misaligned_pin), SUBTEST(igt_ggtt_lowlevel), SUBTEST(igt_ggtt_drunk), SUBTEST(igt_ggtt_walk), SUBTEST(igt_ggtt_pot), SUBTEST(igt_ggtt_fill), SUBTEST(igt_ggtt_page), + SUBTEST(igt_ggtt_misaligned_pin), SUBTEST(igt_cs_tlb), };