From: Chris Wilson <[email protected]> Exercise new API to probe that the userptr range is valid (backed by struct pages and not pfn).
v2: remove POPULATE for now Signed-off-by: Chris Wilson <[email protected]> Signed-off-by: Matthew Auld <[email protected]> Cc: Maarten Lankhorst <[email protected]> Cc: Daniel Vetter <[email protected]> --- tests/i915/gem_userptr_blits.c | 86 ++++++++++++++++++++++++++++++++++ 1 file changed, 86 insertions(+) diff --git a/tests/i915/gem_userptr_blits.c b/tests/i915/gem_userptr_blits.c index 0616a937..532298dc 100644 --- a/tests/i915/gem_userptr_blits.c +++ b/tests/i915/gem_userptr_blits.c @@ -2127,6 +2127,87 @@ static int userfaultfd(int flags) return syscall(SYS_userfaultfd, flags); } +#define LOCAL_I915_PARAM_HAS_USERPTR_PROBE 56 +#define LOCAL_I915_USERPTR_PROBE 0x2 + +static bool has_userptr_probe(int fd) +{ + struct drm_i915_getparam gp; + int value = 0; + + memset(&gp, 0, sizeof(gp)); + gp.param = LOCAL_I915_PARAM_HAS_USERPTR_PROBE; + gp.value = &value; + + ioctl(fd, DRM_IOCTL_I915_GETPARAM, &gp, sizeof(gp)); + errno = 0; + + return value; +} + +static void test_probe(int fd) +{ +#define N_PAGES 5 + struct drm_i915_gem_mmap_offset mmap_offset; + uint32_t handle; + + /* + * We allocate 5 pages, and apply various combinations of unmap, + * remap-mmap-offset to the pages. Then we try to create a userptr from + * the middle 3 pages and check if unexpectedly succeeds or fails. + */ + memset(&mmap_offset, 0, sizeof(mmap_offset)); + mmap_offset.handle = gem_create(fd, PAGE_SIZE); + mmap_offset.flags = I915_MMAP_OFFSET_WB; + igt_assert_eq(igt_ioctl(fd, DRM_IOCTL_I915_GEM_MMAP_OFFSET, &mmap_offset), 0); + + 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_offset.offset); + igt_assert(fixed != MAP_FAILED); + if (page >= 1 && page <= 3) + expected = -EFAULT; + break; + } + } + + igt_assert_eq(__gem_userptr(fd, ptr + PAGE_SIZE, 3*PAGE_SIZE, + 0, LOCAL_I915_USERPTR_PROBE, &handle), + expected); + + munmap(ptr, N_PAGES * PAGE_SIZE); + } + + gem_close(fd, mmap_offset.handle); +#undef N_PAGES +} + static void test_userfault(int i915) { struct uffdio_api api = { .api = UFFD_API }; @@ -2516,4 +2597,9 @@ igt_main_args("c:", NULL, help_str, opt_handler, NULL) igt_subtest("access-control") test_access_control(fd); + + igt_subtest("probe") { + igt_require(has_userptr_probe(fd)); + test_probe(fd); + } } -- 2.26.3 _______________________________________________ Intel-gfx mailing list [email protected] https://lists.freedesktop.org/mailman/listinfo/intel-gfx
