Use a recursive-batch to busy spin on each to ensure that each is being
run simultaneously.
Signed-off-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
Reviewed-by: Joonas Lahtinen <joonas.lahtinen@xxxxxxxxxxxxxxx>
---
drivers/gpu/drm/i915/selftests/i915_gem_request.c | 184 ++++++++++++++++++++++
1 file changed, 184 insertions(+)
diff --git a/drivers/gpu/drm/i915/selftests/i915_gem_request.c b/drivers/gpu/drm/i915/selftests/i915_gem_request.c
index 610f89e3696c..880a1e82393a 100644
--- a/drivers/gpu/drm/i915/selftests/i915_gem_request.c
+++ b/drivers/gpu/drm/i915/selftests/i915_gem_request.c
@@ -338,10 +338,194 @@ static int live_nop_request(void *arg)
return err;
}
+static struct i915_vma *recursive_batch(struct drm_i915_private *i915)
+{
+ struct i915_gem_context *ctx = i915->kernel_context;
+ struct i915_address_space *vm = ctx->ppgtt ? &ctx->ppgtt->base : &i915->ggtt.base;
+ struct drm_i915_gem_object *obj;
+ const int gen = INTEL_GEN(i915);
+ struct i915_vma *vma;
+ u32 *cmd;
+ int err;
+
+ obj = i915_gem_object_create_internal(i915, PAGE_SIZE);
+ if (IS_ERR(obj))
+ return ERR_CAST(obj);
+
+ vma = i915_vma_instance(obj, vm, NULL);
+ if (IS_ERR(vma)) {
+ err = PTR_ERR(vma);
+ goto err;
+ }
+
+ err = i915_vma_pin(vma, 0, 0, PIN_USER);
+ if (err)
+ goto err;
+
+ err = i915_gem_object_set_to_gtt_domain(obj, true);
+ if (err)
+ goto err;
+
+ cmd = i915_gem_object_pin_map(obj, I915_MAP_WC);
+ if (IS_ERR(cmd)) {
+ err = PTR_ERR(cmd);
+ goto err;
+ }
+
+ if (gen >= 8) {
+ *cmd++ = MI_BATCH_BUFFER_START | 1 << 8 | 1;
+ *cmd++ = lower_32_bits(vma->node.start);
+ *cmd++ = upper_32_bits(vma->node.start);
+ } else if (gen >= 6) {
+ *cmd++ = MI_BATCH_BUFFER_START | 1 << 8;
+ *cmd++ = lower_32_bits(vma->node.start);
+ } else if (gen >= 4) {
+ *cmd++ = MI_BATCH_BUFFER_START | MI_BATCH_GTT;
+ *cmd++ = lower_32_bits(vma->node.start);
+ } else {
+ *cmd++ = MI_BATCH_BUFFER_START | MI_BATCH_GTT | 1;
+ *cmd++ = lower_32_bits(vma->node.start);
+ }
+ *cmd++ = MI_BATCH_BUFFER_END; /* terminate early in case of error */
+
+ wmb();
+ i915_gem_object_unpin_map(obj);
+
+ return vma;
+
+err:
+ i915_gem_object_put(obj);
+ return ERR_PTR(err);
+}
+
+static int recursive_batch_resolve(struct i915_vma *batch)
+{
+ u32 *cmd;
+
+ cmd = i915_gem_object_pin_map(batch->obj, I915_MAP_WC);
+ if (IS_ERR(cmd))
+ return PTR_ERR(cmd);
+
+ *cmd = MI_BATCH_BUFFER_END;
+ wmb();
+
+ i915_gem_object_unpin_map(batch->obj);
+
+ return 0;
+}
+
+static int live_all_engines(void *arg)
+{
+ struct drm_i915_private *i915 = arg;
+ struct intel_engine_cs *engine;
+ struct drm_i915_gem_request *request[I915_NUM_ENGINES];
+ struct i915_vma *batch;
+ struct live_test t;
+ unsigned int id;
+ int err;
+
+ /* Check we can submit requests to all engines simultaneously. We
+ * send a recursive batch to each engine - checking that we don't
+ * block doing so, and that they don't complete too soon.
+ */
+
+ mutex_lock(&i915->drm.struct_mutex);
+
+ err = begin_live_test(&t, i915, __func__, "");
+ if (err)
+ goto out_unlock;
+
+ batch = recursive_batch(i915);
+ if (IS_ERR(batch)) {
+ err = PTR_ERR(batch);
+ pr_err("%s: Unable to create batch, err=%d\n", __func__, err);
+ goto out_unlock;
+ }
+
+ for_each_engine(engine, i915, id) {
+ request[id] = i915_gem_request_alloc(engine,
+ i915->kernel_context);
+ if (IS_ERR(request[id])) {
+ err = PTR_ERR(request[id]);
+ pr_err("%s: Request allocation failed with err=%d\n",
+ __func__, err);
+ goto out_request;
+ }
+
+ err = engine->emit_flush(request[id], EMIT_INVALIDATE);
+ GEM_BUG_ON(err);
+
+ err = i915_switch_context(request[id]);
+ GEM_BUG_ON(err);
+
+ err = engine->emit_bb_start(request[id],
+ batch->node.start,
+ batch->node.size,
+ 0);
+ GEM_BUG_ON(err);
+ request[id]->batch = batch;
+
+ if (!i915_gem_object_has_active_reference(batch->obj)) {
+ i915_gem_object_get(batch->obj);
+ i915_gem_object_set_active_reference(batch->obj);
+ }
+
+ i915_vma_move_to_active(batch, request[id], 0);
+ i915_gem_request_get(request[id]);
+ i915_add_request(request[id]);
+ }
+
+ for_each_engine(engine, i915, id) {
+ if (i915_gem_request_completed(request[id])) {
+ pr_err("%s(%s): request completed too early!\n",
+ __func__, engine->name);
+ err = -EINVAL;
+ goto out_request;
+ }
+ }
+
+ err = recursive_batch_resolve(batch);
+ if (err) {
+ pr_err("%s: failed to resolve batch, err=%d\n", __func__, err);
+ goto out_request;
+ }
+
+ for_each_engine(engine, i915, id) {
+ long timeout;
+
+ timeout = i915_wait_request(request[id],
+ I915_WAIT_LOCKED,
+ MAX_SCHEDULE_TIMEOUT);
+ if (timeout < 0) {
+ err = timeout;
+ pr_err("%s: error waiting for request on %s, err=%d\n",
+ __func__, engine->name, err);
+ goto out_request;
+ }
+
+ GEM_BUG_ON(!i915_gem_request_completed(request[id]));
+ i915_gem_request_put(request[id]);
+ request[id] = NULL;
+ }
+
+ err = end_live_test(&t);
+
+out_request:
+ for_each_engine(engine, i915, id)
+ if (request[id])
+ i915_gem_request_put(request[id]);
+ i915_vma_unpin(batch);
+ i915_vma_put(batch);
+out_unlock:
+ mutex_unlock(&i915->drm.struct_mutex);
+ return err;
+}
+
int i915_gem_request_live_selftests(struct drm_i915_private *i915)
{
static const struct i915_subtest tests[] = {
SUBTEST(live_nop_request),
+ SUBTEST(live_all_engines),
};
return i915_subtests(tests, i915);
}
--
2.11.0
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