diff options
Diffstat (limited to 'drivers/gpu/drm/i915/selftests/scatterlist.c')
| -rw-r--r-- | drivers/gpu/drm/i915/selftests/scatterlist.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/selftests/scatterlist.c b/drivers/gpu/drm/i915/selftests/scatterlist.c index 1cc5d2931753..cd6d2a16071f 100644 --- a/drivers/gpu/drm/i915/selftests/scatterlist.c +++ b/drivers/gpu/drm/i915/selftests/scatterlist.c @@ -189,6 +189,20 @@ static unsigned int random(unsigned long n, return 1 + (prandom_u32_state(rnd) % 1024); } +static unsigned int random_page_size_pages(unsigned long n, + unsigned long count, + struct rnd_state *rnd) +{ + /* 4K, 64K, 2M */ + static unsigned int page_count[] = { + BIT(12) >> PAGE_SHIFT, + BIT(16) >> PAGE_SHIFT, + BIT(21) >> PAGE_SHIFT, + }; + + return page_count[(prandom_u32_state(rnd) % 3)]; +} + static inline bool page_contiguous(struct page *first, struct page *last, unsigned long npages) @@ -252,6 +266,7 @@ static const npages_fn_t npages_funcs[] = { grow, shrink, random, + random_page_size_pages, NULL, }; |