Exercise new API to probe that the userptr range is valid (backed by struct pages and not pfn) or to populate the userptr upon creation (by calling get_user_pages() on the range).
Signed-off-by: Chris Wilson <[email protected]> Cc: Tvrtko Ursulin <[email protected]> Cc: Michał Winiarski <[email protected]> --- tests/gem_userptr_blits.c | 79 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 79 insertions(+) diff --git a/tests/gem_userptr_blits.c b/tests/gem_userptr_blits.c index 849054ad..27f61f9c 100644 --- a/tests/gem_userptr_blits.c +++ b/tests/gem_userptr_blits.c @@ -549,6 +549,79 @@ static int test_invalid_gtt_mapping(int fd) return 0; } +#define LOCAL_USERPTR_PROBE 0x2 +#define LOCAL_USERPTR_POPULATE 0x4 +static void test_probe(int fd, unsigned int flags) +{ +#define N_PAGES 5 + struct drm_i915_gem_mmap_gtt mmap_gtt; + uint32_t handle; + + igt_require(__gem_userptr(fd, + (void *)-PAGE_SIZE, 2*PAGE_SIZE, 0, + flags, &handle) == -EFAULT); + + /* + * We allocate 5 pages, and apply various combinations + * of unmap, remap-gtt to the pages. Then we try to + * create a userptr from the middle 3 pages and check + * if unexpectedly succeeds or fails. + */ + memset(&mmap_gtt, 0, sizeof(mmap_gtt)); + mmap_gtt.handle = gem_create(fd, PAGE_SIZE); + drmIoctl(fd, DRM_IOCTL_I915_GEM_MMAP_GTT, &mmap_gtt); + + for (unsigned long pass = 0; pass < 4 * 4 * 4 * 4 *4; pass++) { + int expected = 0; + void *ptr; + + ptr = mmap(NULL, N_PAGES * PAGE_SIZE, + PROT_READ | PROT_WRITE, + MAP_SHARED | MAP_ANONYMOUS, + -1, 0); + + for (int page = 0; page < N_PAGES; page++) { + int mode = (pass >> (2 * page)) & 3; + void *fixed = ptr + page * PAGE_SIZE; + + switch (mode) { + default: + case 0: + break; + + case 1: + munmap(fixed, PAGE_SIZE); + if (page >= 1 && page <= 3) + expected = -EFAULT; + break; + + case 2: + fixed = mmap(fixed, PAGE_SIZE, + PROT_READ | PROT_WRITE, + MAP_SHARED | MAP_FIXED, + fd, mmap_gtt.offset); + igt_assert(fixed != MAP_FAILED); + if (page >= 1 && page <= 3) + expected = -EFAULT; + break; + } + } + + errno = 0; + handle = 0; + igt_assert_eq(__gem_userptr(fd, ptr + PAGE_SIZE, 3*PAGE_SIZE, + 0, flags, &handle), + expected); + if (handle) + gem_close(fd, handle); + + munmap(ptr, N_PAGES * PAGE_SIZE); + } + + gem_close(fd, mmap_gtt.handle); +#undef N_PAGES +} + #define PE_GTT_MAP 0x1 #define PE_BUSY 0x2 static void test_process_exit(int fd, int flags) @@ -1456,6 +1529,12 @@ int main(int argc, char **argv) igt_subtest("invalid-gtt-mapping") test_invalid_gtt_mapping(fd); + igt_subtest("probe") + test_probe(fd, LOCAL_USERPTR_PROBE); + + igt_subtest("populate") + test_probe(fd, LOCAL_USERPTR_POPULATE); + igt_subtest("forked-access") test_forked_access(fd); -- 2.15.0 _______________________________________________ Intel-gfx mailing list [email protected] https://lists.freedesktop.org/mailman/listinfo/intel-gfx
