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igt/gem_mmap_wc/set-cache-level: Exercise set-cache-level WARNing

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With the introduction of mmap(wc) and its unbound GTT write domain, we
can now hit the warning inside set-cache-level, complaining about the
failure to do correct cpu cache tracking.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
This commit is contained in:
Chris Wilson 2015-01-15 08:49:59 +00:00
parent 3ea7a28072
commit d3bf83af03
1 changed files with 47 additions and 0 deletions
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47
tests/gem_mmap_wc.c
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@ -315,6 +315,51 @@ test_write_gtt_read_wc(int fd)
munmap(dst, OBJECT_SIZE); munmap(dst, OBJECT_SIZE);
} }
static void
test_set_cache_level(int fd)
{
struct drm_mode_cursor arg;
struct drm_mode_card_res res;
uint32_t crtc[32];
int active_crtc = 0;
int n;
/* We want to trigger an old WARN in set-cache-level when
* it sees an unbound object in the GTT domain, following
* the introduction of mmap(wc).
*/
memset(&arg, 0, sizeof(arg));
arg.flags = DRM_MODE_CURSOR_BO;
arg.width = arg.height = 64;
arg.handle = gem_create(fd, 64*64*4);
set_domain(fd, arg.handle);
/* Bind the object to the cursor to force set-cache-level(DISPLAY) */
memset(&res, 0, sizeof(res));
res.count_crtcs = 32;
res.crtc_id_ptr = (uintptr_t)crtc;
do_ioctl(fd, DRM_IOCTL_MODE_GETRESOURCES, &res);
for (n = 0; n < res.count_crtcs; n++) {
struct drm_mode_crtc mode;
memset(&mode, 0, sizeof(mode));
mode.crtc_id = crtc[n];
do_ioctl(fd, DRM_IOCTL_MODE_GETCRTC, &mode);
if (!mode.mode_valid)
continue;
active_crtc++;
arg.crtc_id = crtc[n];
do_ioctl(fd, DRM_IOCTL_MODE_CURSOR, &arg);
}
gem_close(fd, arg.handle);
igt_require(active_crtc);
}
struct thread_fault_concurrent { struct thread_fault_concurrent {
pthread_t thread; pthread_t thread;
int id; int id;
@ -414,6 +459,8 @@ igt_main
test_write_cpu_read_wc(fd); test_write_cpu_read_wc(fd);
igt_subtest("write-gtt-read-wc") igt_subtest("write-gtt-read-wc")
test_write_gtt_read_wc(fd); test_write_gtt_read_wc(fd);
igt_subtest("set-cache-level")
test_set_cache_level(fd);
igt_fixture igt_fixture
close(fd); close(fd);