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igt/gem_busy: Use a boatload of store-dwords to force ring busyness

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A little more inelegant as we can't control the delay very well, but it
should prove more vesatile and broaden the test coverge (and still be
quick enough for basic).

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
This commit is contained in:
Chris Wilson 2016-04-01 13:19:07 +01:00
parent c89e8dbfd8
commit 0f5b03fa38
1 changed files with 114 additions and 9 deletions
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123
tests/gem_busy.c
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@ -28,6 +28,18 @@ IGT_TEST_DESCRIPTION("Basic check of busy-ioctl ABI.");
enum { TEST = 0, BUSY, BATCH };
static bool gem_busy(int fd, uint32_t handle)
{
struct drm_i915_gem_busy busy;
memset(&busy, 0, sizeof(busy));
busy.handle = handle;
do_ioctl(fd, DRM_IOCTL_I915_GEM_BUSY, &busy);
return busy.busy != 0;
}
static void __gem_busy(int fd,
uint32_t handle,
uint32_t *read,
@ -153,7 +165,7 @@ static bool still_busy(int fd, uint32_t handle)
return write;
}
static void test_ring(int fd, unsigned ring, uint32_t flags)
static void semaphore(int fd, unsigned ring, uint32_t flags)
{
uint32_t bbe = MI_BATCH_BUFFER_END;
uint32_t handle[3];
@ -208,6 +220,84 @@ static void test_ring(int fd, unsigned ring, uint32_t flags)
gem_close(fd, handle[i]);
}
static void store(int fd, unsigned ring, uint32_t flags)
{
const int gen = intel_gen(intel_get_drm_devid(fd));
struct drm_i915_gem_exec_object2 obj[2];
struct drm_i915_gem_relocation_entry reloc;
struct drm_i915_gem_execbuffer2 execbuf;
uint32_t read[2], write[2];
struct timespec tv;
uint32_t batch[16];
int i, count;
gem_require_ring(fd, ring | flags);
igt_skip_on_f(gen == 6 && (ring & ~(3<<13)) == I915_EXEC_BSD,
"MI_STORE_DATA broken on gen6 bsd\n");
memset(&execbuf, 0, sizeof(execbuf));
execbuf.buffers_ptr = (uintptr_t)obj;
execbuf.buffer_count = 2;
execbuf.flags = ring | flags;
if (gen < 6)
execbuf.flags |= I915_EXEC_SECURE;
memset(obj, 0, sizeof(obj));
obj[0].handle = gem_create(fd, 4096);
obj[1].handle = gem_create(fd, 4096);
memset(&reloc, 0, sizeof(reloc));
reloc.target_handle = obj[0].handle;
reloc.presumed_offset = 0;
reloc.offset = sizeof(uint32_t);
reloc.delta = 0;
reloc.read_domains = I915_GEM_DOMAIN_INSTRUCTION;
reloc.write_domain = I915_GEM_DOMAIN_INSTRUCTION;
obj[1].relocs_ptr = (uintptr_t)&reloc;
obj[1].relocation_count = 1;
i = 0;
batch[i] = MI_STORE_DWORD_IMM | (gen < 6 ? 1 << 22 : 0);
if (gen >= 8) {
batch[++i] = 0;
batch[++i] = 0;
} else if (gen >= 4) {
batch[++i] = 0;
batch[++i] = 0;
reloc.offset += sizeof(uint32_t);
} else {
batch[i]--;
batch[++i] = 0;
}
batch[++i] = 0xc0ffee;
batch[++i] = MI_BATCH_BUFFER_END;
gem_write(fd, obj[1].handle, 0, batch, sizeof(batch));
count = 16;
do {
for (i = 0; i < count; i++)
gem_execbuf(fd, &execbuf);
__gem_busy(fd, obj[0].handle, &read[0], &write[0]);
__gem_busy(fd, obj[1].handle, &read[1], &write[1]);
count <<= 1;
} while (read[0] == 0 || read[1] == 0);
igt_assert_eq(write[0], ring);
igt_assert_eq(read[0], 1 << ring);
igt_assert_eq(write[1], 0);
igt_assert_eq(read[1], 1 << ring);
/* Calling busy in a loop should be enough to flush the rendering */
memset(&tv, 0, sizeof(tv));
while (gem_busy(fd, obj[1].handle))
igt_assert(igt_seconds_elapsed(&tv) < 2);
igt_assert(!gem_busy(fd, obj[0].handle));
gem_close(fd, obj[1].handle);
gem_close(fd, obj[0].handle);
}
static bool has_semaphores(int fd)
{
struct drm_i915_getparam gp;
@ -230,17 +320,32 @@ igt_main
igt_skip_on_simulation();
igt_fixture {
fd = drm_open_driver(DRIVER_INTEL);
igt_require(has_semaphores(fd));
igt_fixture
fd = drm_open_driver_master(DRIVER_INTEL);
igt_subtest_group {
for (e = intel_execution_engines; e->name; e++) {
/* default exec-id is purely symbolic */
if (e->exec_id == 0)
continue;
igt_subtest_f("basic-%s", e->name)
store(fd, e->exec_id, e->flags);
}
}
for (e = intel_execution_engines; e->name; e++) {
if (e->exec_id == 0) /* default exec-id is purely symbolic */
continue;
igt_subtest_group {
igt_fixture
igt_require(has_semaphores(fd));
igt_subtest_f("%s", e->name)
test_ring(fd, e->exec_id, e->flags);
for (e = intel_execution_engines; e->name; e++) {
/* default exec-id is purely symbolic */
if (e->exec_id == 0)
continue;
igt_subtest_f("semaphore-%s", e->name)
semaphore(fd, e->exec_id, e->flags);
}
}
igt_fixture