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igt/gem_mmap_wc: Test cpu mmap vs wc mmap coherency

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Similar to the cpu mmap vs gtt mmap coherency test.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
This commit is contained in:
Chris Wilson
2016-01-08 16:32:29 +00:00
parent 571b876544
commit a6090c7191
4 changed files with 88 additions and 52 deletions
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tests/gem_mmap_wc.c
+29
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@@ -217,6 +217,33 @@ test_write(int fd)
munmap(src, OBJECT_SIZE);
}
static void
test_coherency(int fd)
{
uint32_t handle;
uint32_t *wc, *cpu;
int i;
igt_require(igt_setup_clflush());
handle = gem_create(fd, OBJECT_SIZE);
wc = gem_mmap__wc(fd, handle, 0, OBJECT_SIZE, PROT_READ | PROT_WRITE);
cpu = gem_mmap__cpu(fd, handle, 0, OBJECT_SIZE, PROT_READ | PROT_WRITE);
gem_set_domain(fd, handle, I915_GEM_DOMAIN_GTT, I915_GEM_DOMAIN_GTT);
for (i = 0; i < OBJECT_SIZE / 64; i++) {
int x = 16*i + (i%16);
wc[x] = i;
igt_clflush_range(&cpu[x], sizeof(cpu[x]));
igt_assert_eq(cpu[x], i);
}
munmap(cpu, OBJECT_SIZE);
munmap(wc, OBJECT_SIZE);
gem_close(fd, handle);
}
static void
test_write_gtt(int fd)
{
@@ -446,6 +473,8 @@ igt_main
test_read(fd);
igt_subtest("write")
test_write(fd);
igt_subtest("coherency")
test_coherency(fd);
igt_subtest("write-gtt")
test_write_gtt(fd);
igt_subtest("read-write")