示例#1
0
/*
 * Create as many clients as number of doorbells. Note that there's already
 * client(s)/doorbell(s) created during driver load, but this test creates
 * its own and do not interact with the existing ones.
 */
static int igt_guc_doorbells(void *arg)
{
	struct drm_i915_private *dev_priv = arg;
	struct intel_guc *guc;
	int i, err = 0;
	u16 db_id;

	GEM_BUG_ON(!HAS_GUC(dev_priv));
	mutex_lock(&dev_priv->drm.struct_mutex);
	intel_runtime_pm_get(dev_priv);

	guc = &dev_priv->guc;
	if (!guc) {
		pr_err("No guc object!\n");
		err = -EINVAL;
		goto unlock;
	}

	err = check_all_doorbells(guc);
	if (err)
		goto unlock;

	for (i = 0; i < ATTEMPTS; i++) {
		clients[i] = guc_client_alloc(dev_priv,
					      INTEL_INFO(dev_priv)->ring_mask,
					      i % GUC_CLIENT_PRIORITY_NUM,
					      dev_priv->kernel_context);

		if (!clients[i]) {
			pr_err("[%d] No guc client\n", i);
			err = -EINVAL;
			goto out;
		}

		if (IS_ERR(clients[i])) {
			if (PTR_ERR(clients[i]) != -ENOSPC) {
				pr_err("[%d] unexpected error\n", i);
				err = PTR_ERR(clients[i]);
				goto out;
			}

			if (available_dbs(guc, i % GUC_CLIENT_PRIORITY_NUM)) {
				pr_err("[%d] non-db related alloc fail\n", i);
				err = -EINVAL;
				goto out;
			}

			/* expected, ran out of dbs for this client type */
			continue;
		}

		/*
		 * The check below is only valid because we keep a doorbell
		 * assigned during the whole life of the client.
		 */
		if (clients[i]->stage_id >= GUC_NUM_DOORBELLS) {
			pr_err("[%d] more clients than doorbells (%d >= %d)\n",
			       i, clients[i]->stage_id, GUC_NUM_DOORBELLS);
			err = -EINVAL;
			goto out;
		}

		err = validate_client(clients[i],
				      i % GUC_CLIENT_PRIORITY_NUM, false);
		if (err) {
			pr_err("[%d] client_alloc sanity check failed!\n", i);
			err = -EINVAL;
			goto out;
		}

		db_id = clients[i]->doorbell_id;

		err = __guc_client_enable(clients[i]);
		if (err) {
			pr_err("[%d] Failed to create a doorbell\n", i);
			goto out;
		}

		/* doorbell id shouldn't change, we are holding the mutex */
		if (db_id != clients[i]->doorbell_id) {
			pr_err("[%d] doorbell id changed (%d != %d)\n",
			       i, db_id, clients[i]->doorbell_id);
			err = -EINVAL;
			goto out;
		}

		err = check_all_doorbells(guc);
		if (err)
			goto out;

		err = ring_doorbell_nop(clients[i]);
		if (err)
			goto out;
	}

out:
	for (i = 0; i < ATTEMPTS; i++)
		if (!IS_ERR_OR_NULL(clients[i])) {
			__guc_client_disable(clients[i]);
			guc_client_free(clients[i]);
		}
unlock:
	intel_runtime_pm_put(dev_priv);
	mutex_unlock(&dev_priv->drm.struct_mutex);
	return err;
}
示例#2
0
/*
 * Check that we're able to synchronize guc_clients with their doorbells
 *
 * We're creating clients and reserving doorbells once, at module load. During
 * module lifetime, GuC, doorbell HW, and i915 state may go out of sync due to
 * GuC being reset. In other words - GuC clients are still around, but the
 * status of their doorbells may be incorrect. This is the reason behind
 * validating that the doorbells status expected by the driver matches what the
 * GuC/HW have.
 */
static int igt_guc_clients(void *args)
{
	struct drm_i915_private *dev_priv = args;
	struct intel_guc *guc;
	int err = 0;

	GEM_BUG_ON(!HAS_GUC(dev_priv));
	mutex_lock(&dev_priv->drm.struct_mutex);

	guc = &dev_priv->guc;
	if (!guc) {
		pr_err("No guc object!\n");
		err = -EINVAL;
		goto unlock;
	}

	err = check_all_doorbells(guc);
	if (err)
		goto unlock;

	/*
	 * Get rid of clients created during driver load because the test will
	 * recreate them.
	 */
	guc_clients_destroy(guc);
	if (guc->execbuf_client || guc->preempt_client) {
		pr_err("guc_clients_destroy lied!\n");
		err = -EINVAL;
		goto unlock;
	}

	err = guc_clients_create(guc);
	if (err) {
		pr_err("Failed to create clients\n");
		goto unlock;
	}
	GEM_BUG_ON(!guc->execbuf_client);
	GEM_BUG_ON(!guc->preempt_client);

	err = validate_client(guc->execbuf_client,
			      GUC_CLIENT_PRIORITY_KMD_NORMAL, false);
	if (err) {
		pr_err("execbug client validation failed\n");
		goto out;
	}

	err = validate_client(guc->preempt_client,
			      GUC_CLIENT_PRIORITY_KMD_HIGH, true);
	if (err) {
		pr_err("preempt client validation failed\n");
		goto out;
	}

	/* each client should now have reserved a doorbell */
	if (!has_doorbell(guc->execbuf_client) ||
	    !has_doorbell(guc->preempt_client)) {
		pr_err("guc_clients_create didn't reserve doorbells\n");
		err = -EINVAL;
		goto out;
	}

	/* Now create the doorbells */
	guc_clients_doorbell_init(guc);

	/* each client should now have received a doorbell */
	if (!client_doorbell_in_sync(guc->execbuf_client) ||
	    !client_doorbell_in_sync(guc->preempt_client)) {
		pr_err("failed to initialize the doorbells\n");
		err = -EINVAL;
		goto out;
	}

	/*
	 * Basic test - an attempt to reallocate a valid doorbell to the
	 * client it is currently assigned should not cause a failure.
	 */
	err = guc_clients_doorbell_init(guc);
	if (err)
		goto out;

	/*
	 * Negative test - a client with no doorbell (invalid db id).
	 * After destroying the doorbell, the db id is changed to
	 * GUC_DOORBELL_INVALID and the firmware will reject any attempt to
	 * allocate a doorbell with an invalid id (db has to be reserved before
	 * allocation).
	 */
	destroy_doorbell(guc->execbuf_client);
	if (client_doorbell_in_sync(guc->execbuf_client)) {
		pr_err("destroy db did not work\n");
		err = -EINVAL;
		goto out;
	}

	unreserve_doorbell(guc->execbuf_client);
	err = guc_clients_doorbell_init(guc);
	if (err != -EIO) {
		pr_err("unexpected (err = %d)", err);
		goto out;
	}

	if (!available_dbs(guc, guc->execbuf_client->priority)) {
		pr_err("doorbell not available when it should\n");
		err = -EIO;
		goto out;
	}

	/* clean after test */
	err = reserve_doorbell(guc->execbuf_client);
	if (err) {
		pr_err("failed to reserve back the doorbell back\n");
	}
	err = create_doorbell(guc->execbuf_client);
	if (err) {
		pr_err("recreate doorbell failed\n");
		goto out;
	}

out:
	/*
	 * Leave clean state for other test, plus the driver always destroy the
	 * clients during unload.
	 */
	destroy_doorbell(guc->execbuf_client);
	destroy_doorbell(guc->preempt_client);
	guc_clients_destroy(guc);
	guc_clients_create(guc);
	guc_clients_doorbell_init(guc);
unlock:
	mutex_unlock(&dev_priv->drm.struct_mutex);
	return err;
}