drm/i915/selftests: drop igt_ppgtt_exhaust_huge

We already have tests that exhaustively exercise the most interesting
page-size combinations, along with tests that offer randomisation, and
so we should already be testing objects(local, system) with a varying
mix of page-sizes, which leaves igt_ppgtt_exhaust_huge providing not
much in terms of extra coverage.

Signed-off-by: Matthew Auld <matthew.auld@intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20200206170340.102613-1-matthew.auld@intel.com

diff --git a/drivers/gpu/drm/i915/gem/selftests/huge_pages.c b/drivers/gpu/drm/i915/gem/selftests/huge_pages.c
index 9311250..2d0fd50 100644 (file)
--- a/drivers/gpu/drm/i915/gem/selftests/huge_pages.c
+++ b/drivers/gpu/drm/i915/gem/selftests/huge_pages.c
@@ -1208,107 +1208,6 @@ static int igt_write_huge(struct i915_gem_context *ctx,
        return err;
 }
 
-static int igt_ppgtt_exhaust_huge(void *arg)
-{
-       struct i915_gem_context *ctx = arg;
-       struct drm_i915_private *i915 = ctx->i915;
-       unsigned long supported = INTEL_INFO(i915)->page_sizes;
-       static unsigned int pages[ARRAY_SIZE(page_sizes)];
-       struct drm_i915_gem_object *obj;
-       unsigned int size_mask;
-       unsigned int page_mask;
-       int n, i;
-       int err = -ENODEV;
-
-       if (supported == I915_GTT_PAGE_SIZE_4K)
-               return 0;
-
-       /*
-        * Sanity check creating objects with a varying mix of page sizes --
-        * ensuring that our writes lands in the right place.
-        */
-
-       n = 0;
-       for_each_set_bit(i, &supported, ilog2(I915_GTT_MAX_PAGE_SIZE) + 1)
-               pages[n++] = BIT(i);
-
-       for (size_mask = 2; size_mask < BIT(n); size_mask++) {
-               unsigned int size = 0;
-
-               for (i = 0; i < n; i++) {
-                       if (size_mask & BIT(i))
-                               size |= pages[i];
-               }
-
-               /*
-                * For our page mask we want to enumerate all the page-size
-                * combinations which will fit into our chosen object size.
-                */
-               for (page_mask = 2; page_mask <= size_mask; page_mask++) {
-                       unsigned int page_sizes = 0;
-
-                       for (i = 0; i < n; i++) {
-                               if (page_mask & BIT(i))
-                                       page_sizes |= pages[i];
-                       }
-
-                       /*
-                        * Ensure that we can actually fill the given object
-                        * with our chosen page mask.
-                        */
-                       if (!IS_ALIGNED(size, BIT(__ffs(page_sizes))))
-                               continue;
-
-                       obj = huge_pages_object(i915, size, page_sizes);
-                       if (IS_ERR(obj)) {
-                               err = PTR_ERR(obj);
-                               goto out_device;
-                       }
-
-                       err = i915_gem_object_pin_pages(obj);
-                       if (err) {
-                               i915_gem_object_put(obj);
-
-                               if (err == -ENOMEM) {
-                                       pr_info("unable to get pages, size=%u, pages=%u\n",
-                                               size, page_sizes);
-                                       err = 0;
-                                       break;
-                               }
-
-                               pr_err("pin_pages failed, size=%u, pages=%u\n",
-                                      size_mask, page_mask);
-
-                               goto out_device;
-                       }
-
-                       /* Force the page-size for the gtt insertion */
-                       obj->mm.page_sizes.sg = page_sizes;
-
-                       err = igt_write_huge(ctx, obj);
-                       if (err) {
-                               pr_err("exhaust write-huge failed with size=%u\n",
-                                      size);
-                               goto out_unpin;
-                       }
-
-                       i915_gem_object_unpin_pages(obj);
-                       __i915_gem_object_put_pages(obj);
-                       i915_gem_object_put(obj);
-               }
-       }
-
-       goto out_device;
-
-out_unpin:
-       i915_gem_object_unpin_pages(obj);
-       i915_gem_object_put(obj);
-out_device:
-       mkwrite_device_info(i915)->page_sizes = supported;
-
-       return err;
-}
-
 typedef struct drm_i915_gem_object *
 (*igt_create_fn)(struct drm_i915_private *i915, u32 size, u32 flags);
 
@@ -1900,7 +1799,6 @@ int i915_gem_huge_page_live_selftests(struct drm_i915_private *i915)
                SUBTEST(igt_shrink_thp),
                SUBTEST(igt_ppgtt_pin_update),
                SUBTEST(igt_tmpfs_fallback),
-               SUBTEST(igt_ppgtt_exhaust_huge),
                SUBTEST(igt_ppgtt_smoke_huge),
                SUBTEST(igt_ppgtt_sanity_check),
        };