diff options
Diffstat (limited to 'drivers/gpu/drm/i915/selftests/i915_sw_fence.c')
| -rw-r--r-- | drivers/gpu/drm/i915/selftests/i915_sw_fence.c | 134 |
1 files changed, 134 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/selftests/i915_sw_fence.c b/drivers/gpu/drm/i915/selftests/i915_sw_fence.c index ea01d0fe3ace..570e325af93e 100644 --- a/drivers/gpu/drm/i915/selftests/i915_sw_fence.c +++ b/drivers/gpu/drm/i915/selftests/i915_sw_fence.c @@ -606,6 +606,139 @@ err: return -EINVAL; } +static const char *mock_name(struct dma_fence *fence) +{ + return "mock"; +} + +static bool mock_enable_signaling(struct dma_fence *fence) +{ + return true; +} + +static const struct dma_fence_ops mock_fence_ops = { + .get_driver_name = mock_name, + .get_timeline_name = mock_name, + .enable_signaling = mock_enable_signaling, + .wait = dma_fence_default_wait, + .release = dma_fence_free, +}; + +static DEFINE_SPINLOCK(mock_fence_lock); + +static struct dma_fence *alloc_dma_fence(void) +{ + struct dma_fence *dma; + + dma = kmalloc(sizeof(*dma), GFP_KERNEL); + if (dma) + dma_fence_init(dma, &mock_fence_ops, &mock_fence_lock, 0, 0); + + return dma; +} + +static struct i915_sw_fence * +wrap_dma_fence(struct dma_fence *dma, unsigned long delay) +{ + struct i915_sw_fence *fence; + int err; + + fence = alloc_fence(); + if (!fence) + return ERR_PTR(-ENOMEM); + + err = i915_sw_fence_await_dma_fence(fence, dma, delay, GFP_NOWAIT); + i915_sw_fence_commit(fence); + if (err < 0) { + free_fence(fence); + return ERR_PTR(err); + } + + return fence; +} + +static int test_dma_fence(void *arg) +{ + struct i915_sw_fence *timeout = NULL, *not = NULL; + unsigned long delay = i915_selftest.timeout_jiffies; + unsigned long end, sleep; + struct dma_fence *dma; + int err; + + dma = alloc_dma_fence(); + if (!dma) + return -ENOMEM; + + timeout = wrap_dma_fence(dma, delay); + if (IS_ERR(timeout)) { + err = PTR_ERR(timeout); + goto err; + } + + not = wrap_dma_fence(dma, 0); + if (IS_ERR(not)) { + err = PTR_ERR(not); + goto err; + } + + err = -EINVAL; + if (i915_sw_fence_done(timeout) || i915_sw_fence_done(not)) { + pr_err("Fences immediately signaled\n"); + goto err; + } + + /* We round the timeout for the fence up to the next second */ + end = round_jiffies_up(jiffies + delay); + + sleep = jiffies_to_usecs(delay) / 3; + usleep_range(sleep, 2 * sleep); + if (time_after(jiffies, end)) { + pr_debug("Slept too long, delay=%lu, (target=%lu, now=%lu) skipping\n", + delay, end, jiffies); + goto skip; + } + + if (i915_sw_fence_done(timeout) || i915_sw_fence_done(not)) { + pr_err("Fences signaled too early\n"); + goto err; + } + + if (!wait_event_timeout(timeout->wait, + i915_sw_fence_done(timeout), + 2 * (end - jiffies) + 1)) { + pr_err("Timeout fence unsignaled!\n"); + goto err; + } + + if (i915_sw_fence_done(not)) { + pr_err("No timeout fence signaled!\n"); + goto err; + } + +skip: + dma_fence_signal(dma); + + if (!i915_sw_fence_done(timeout) || !i915_sw_fence_done(not)) { + pr_err("Fences unsignaled\n"); + goto err; + } + + free_fence(not); + free_fence(timeout); + dma_fence_put(dma); + + return 0; + +err: + dma_fence_signal(dma); + if (!IS_ERR_OR_NULL(timeout)) + free_fence(timeout); + if (!IS_ERR_OR_NULL(not)) + free_fence(not); + dma_fence_put(dma); + return err; +} + int i915_sw_fence_mock_selftests(void) { static const struct i915_subtest tests[] = { @@ -618,6 +751,7 @@ int i915_sw_fence_mock_selftests(void) SUBTEST(test_chain), SUBTEST(test_ipc), SUBTEST(test_timer), + SUBTEST(test_dma_fence), }; return i915_subtests(tests, NULL); |