1 files changed, 459 insertions, 0 deletions
diff --git a/drivers/crypto/qat/qat_common/adf_init.c b/drivers/crypto/qat/qat_common/adf_init.c
new file mode 100644
index 000000000..2e3481270
--- /dev/null
+++ b/drivers/crypto/qat/qat_common/adf_init.c
@@ -0,0 +1,459 @@
+// SPDX-License-Identifier: (BSD-3-Clause OR GPL-2.0-only)
+/* Copyright(c) 2014 - 2020 Intel Corporation */
+#include <linux/mutex.h>
+#include <linux/list.h>
+#include <linux/bitops.h>
+#include <linux/delay.h>
+#include "adf_accel_devices.h"
+#include "adf_cfg.h"
+#include "adf_common_drv.h"
+
+static LIST_HEAD(service_table);
+static DEFINE_MUTEX(service_lock);
+
+static void adf_service_add(struct service_hndl *service)
+{
+	mutex_lock(&service_lock);
+	list_add(&service->list, &service_table);
+	mutex_unlock(&service_lock);
+}
+
+int adf_service_register(struct service_hndl *service)
+{
+	memset(service->init_status, 0, sizeof(service->init_status));
+	memset(service->start_status, 0, sizeof(service->start_status));
+	adf_service_add(service);
+	return 0;
+}
+
+static void adf_service_remove(struct service_hndl *service)
+{
+	mutex_lock(&service_lock);
+	list_del(&service->list);
+	mutex_unlock(&service_lock);
+}
+
+int adf_service_unregister(struct service_hndl *service)
+{
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(service->init_status); i++) {
+		if (service->init_status[i] || service->start_status[i]) {
+			pr_err("QAT: Could not remove active service\n");
+			return -EFAULT;
+		}
+	}
+	adf_service_remove(service);
+	return 0;
+}
+
+/**
+ * adf_dev_init() - Init data structures and services for the given accel device
+ * @accel_dev: Pointer to acceleration device.
+ *
+ * Initialize the ring data structures and the admin comms and arbitration
+ * services.
+ *
+ * Return: 0 on success, error code otherwise.
+ */
+int adf_dev_init(struct adf_accel_dev *accel_dev)
+{
+	struct service_hndl *service;
+	struct list_head *list_itr;
+	struct adf_hw_device_data *hw_data = accel_dev->hw_device;
+	int ret;
+
+	if (!hw_data) {
+		dev_err(&GET_DEV(accel_dev),
+			"Failed to init device - hw_data not set\n");
+		return -EFAULT;
+	}
+
+	if (!test_bit(ADF_STATUS_CONFIGURED, &accel_dev->status) &&
+	    !accel_dev->is_vf) {
+		dev_err(&GET_DEV(accel_dev), "Device not configured\n");
+		return -EFAULT;
+	}
+
+	if (adf_init_etr_data(accel_dev)) {
+		dev_err(&GET_DEV(accel_dev), "Failed initialize etr\n");
+		return -EFAULT;
+	}
+
+	if (hw_data->init_device && hw_data->init_device(accel_dev)) {
+		dev_err(&GET_DEV(accel_dev), "Failed to initialize device\n");
+		return -EFAULT;
+	}
+
+	if (hw_data->init_admin_comms && hw_data->init_admin_comms(accel_dev)) {
+		dev_err(&GET_DEV(accel_dev), "Failed initialize admin comms\n");
+		return -EFAULT;
+	}
+
+	if (hw_data->init_arb && hw_data->init_arb(accel_dev)) {
+		dev_err(&GET_DEV(accel_dev), "Failed initialize hw arbiter\n");
+		return -EFAULT;
+	}
+
+	if (adf_ae_init(accel_dev)) {
+		dev_err(&GET_DEV(accel_dev),
+			"Failed to initialise Acceleration Engine\n");
+		return -EFAULT;
+	}
+	set_bit(ADF_STATUS_AE_INITIALISED, &accel_dev->status);
+
+	if (adf_ae_fw_load(accel_dev)) {
+		dev_err(&GET_DEV(accel_dev),
+			"Failed to load acceleration FW\n");
+		return -EFAULT;
+	}
+	set_bit(ADF_STATUS_AE_UCODE_LOADED, &accel_dev->status);
+
+	if (hw_data->alloc_irq(accel_dev)) {
+		dev_err(&GET_DEV(accel_dev), "Failed to allocate interrupts\n");
+		return -EFAULT;
+	}
+	set_bit(ADF_STATUS_IRQ_ALLOCATED, &accel_dev->status);
+
+	hw_data->enable_ints(accel_dev);
+	hw_data->enable_error_correction(accel_dev);
+
+	ret = hw_data->pfvf_ops.enable_comms(accel_dev);
+	if (ret)
+		return ret;
+
+	if (!test_bit(ADF_STATUS_CONFIGURED, &accel_dev->status) &&
+	    accel_dev->is_vf) {
+		if (qat_crypto_vf_dev_config(accel_dev))
+			return -EFAULT;
+	}
+
+	/*
+	 * Subservice initialisation is divided into two stages: init and start.
+	 * This is to facilitate any ordering dependencies between services
+	 * prior to starting any of the accelerators.
+	 */
+	list_for_each(list_itr, &service_table) {
+		service = list_entry(list_itr, struct service_hndl, list);
+		if (service->event_hld(accel_dev, ADF_EVENT_INIT)) {
+			dev_err(&GET_DEV(accel_dev),
+				"Failed to initialise service %s\n",
+				service->name);
+			return -EFAULT;
+		}
+		set_bit(accel_dev->accel_id, service->init_status);
+	}
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(adf_dev_init);
+
+/**
+ * adf_dev_start() - Start acceleration service for the given accel device
+ * @accel_dev:    Pointer to acceleration device.
+ *
+ * Function notifies all the registered services that the acceleration device
+ * is ready to be used.
+ * To be used by QAT device specific drivers.
+ *
+ * Return: 0 on success, error code otherwise.
+ */
+int adf_dev_start(struct adf_accel_dev *accel_dev)
+{
+	struct adf_hw_device_data *hw_data = accel_dev->hw_device;
+	struct service_hndl *service;
+	struct list_head *list_itr;
+
+	set_bit(ADF_STATUS_STARTING, &accel_dev->status);
+
+	if (adf_ae_start(accel_dev)) {
+		dev_err(&GET_DEV(accel_dev), "AE Start Failed\n");
+		return -EFAULT;
+	}
+	set_bit(ADF_STATUS_AE_STARTED, &accel_dev->status);
+
+	if (hw_data->send_admin_init(accel_dev)) {
+		dev_err(&GET_DEV(accel_dev), "Failed to send init message\n");
+		return -EFAULT;
+	}
+
+	/* Set ssm watch dog timer */
+	if (hw_data->set_ssm_wdtimer)
+		hw_data->set_ssm_wdtimer(accel_dev);
+
+	/* Enable Power Management */
+	if (hw_data->enable_pm && hw_data->enable_pm(accel_dev)) {
+		dev_err(&GET_DEV(accel_dev), "Failed to configure Power Management\n");
+		return -EFAULT;
+	}
+
+	list_for_each(list_itr, &service_table) {
+		service = list_entry(list_itr, struct service_hndl, list);
+		if (service->event_hld(accel_dev, ADF_EVENT_START)) {
+			dev_err(&GET_DEV(accel_dev),
+				"Failed to start service %s\n",
+				service->name);
+			return -EFAULT;
+		}
+		set_bit(accel_dev->accel_id, service->start_status);
+	}
+
+	clear_bit(ADF_STATUS_STARTING, &accel_dev->status);
+	set_bit(ADF_STATUS_STARTED, &accel_dev->status);
+
+	if (!list_empty(&accel_dev->crypto_list) &&
+	    (qat_algs_register() || qat_asym_algs_register())) {
+		dev_err(&GET_DEV(accel_dev),
+			"Failed to register crypto algs\n");
+		set_bit(ADF_STATUS_STARTING, &accel_dev->status);
+		clear_bit(ADF_STATUS_STARTED, &accel_dev->status);
+		return -EFAULT;
+	}
+	set_bit(ADF_STATUS_CRYPTO_ALGS_REGISTERED, &accel_dev->status);
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(adf_dev_start);
+
+/**
+ * adf_dev_stop() - Stop acceleration service for the given accel device
+ * @accel_dev:    Pointer to acceleration device.
+ *
+ * Function notifies all the registered services that the acceleration device
+ * is shuting down.
+ * To be used by QAT device specific drivers.
+ *
+ * Return: void
+ */
+void adf_dev_stop(struct adf_accel_dev *accel_dev)
+{
+	struct service_hndl *service;
+	struct list_head *list_itr;
+	bool wait = false;
+	int ret;
+
+	if (!adf_dev_started(accel_dev) &&
+	    !test_bit(ADF_STATUS_STARTING, &accel_dev->status))
+		return;
+
+	clear_bit(ADF_STATUS_STARTING, &accel_dev->status);
+	clear_bit(ADF_STATUS_STARTED, &accel_dev->status);
+
+	if (!list_empty(&accel_dev->crypto_list) &&
+	    test_bit(ADF_STATUS_CRYPTO_ALGS_REGISTERED, &accel_dev->status)) {
+		qat_algs_unregister();
+		qat_asym_algs_unregister();
+	}
+	clear_bit(ADF_STATUS_CRYPTO_ALGS_REGISTERED, &accel_dev->status);
+
+	list_for_each(list_itr, &service_table) {
+		service = list_entry(list_itr, struct service_hndl, list);
+		if (!test_bit(accel_dev->accel_id, service->start_status))
+			continue;
+		ret = service->event_hld(accel_dev, ADF_EVENT_STOP);
+		if (!ret) {
+			clear_bit(accel_dev->accel_id, service->start_status);
+		} else if (ret == -EAGAIN) {
+			wait = true;
+			clear_bit(accel_dev->accel_id, service->start_status);
+		}
+	}
+
+	if (wait)
+		msleep(100);
+
+	if (test_bit(ADF_STATUS_AE_STARTED, &accel_dev->status)) {
+		if (adf_ae_stop(accel_dev))
+			dev_err(&GET_DEV(accel_dev), "failed to stop AE\n");
+		else
+			clear_bit(ADF_STATUS_AE_STARTED, &accel_dev->status);
+	}
+}
+EXPORT_SYMBOL_GPL(adf_dev_stop);
+
+/**
+ * adf_dev_shutdown() - shutdown acceleration services and data strucutures
+ * @accel_dev: Pointer to acceleration device
+ *
+ * Cleanup the ring data structures and the admin comms and arbitration
+ * services.
+ */
+void adf_dev_shutdown(struct adf_accel_dev *accel_dev)
+{
+	struct adf_hw_device_data *hw_data = accel_dev->hw_device;
+	struct service_hndl *service;
+	struct list_head *list_itr;
+
+	if (!hw_data) {
+		dev_err(&GET_DEV(accel_dev),
+			"QAT: Failed to shutdown device - hw_data not set\n");
+		return;
+	}
+
+	if (test_bit(ADF_STATUS_AE_UCODE_LOADED, &accel_dev->status)) {
+		adf_ae_fw_release(accel_dev);
+		clear_bit(ADF_STATUS_AE_UCODE_LOADED, &accel_dev->status);
+	}
+
+	if (test_bit(ADF_STATUS_AE_INITIALISED, &accel_dev->status)) {
+		if (adf_ae_shutdown(accel_dev))
+			dev_err(&GET_DEV(accel_dev),
+				"Failed to shutdown Accel Engine\n");
+		else
+			clear_bit(ADF_STATUS_AE_INITIALISED,
+				  &accel_dev->status);
+	}
+
+	list_for_each(list_itr, &service_table) {
+		service = list_entry(list_itr, struct service_hndl, list);
+		if (!test_bit(accel_dev->accel_id, service->init_status))
+			continue;
+		if (service->event_hld(accel_dev, ADF_EVENT_SHUTDOWN))
+			dev_err(&GET_DEV(accel_dev),
+				"Failed to shutdown service %s\n",
+				service->name);
+		else
+			clear_bit(accel_dev->accel_id, service->init_status);
+	}
+
+	hw_data->disable_iov(accel_dev);
+
+	if (test_bit(ADF_STATUS_IRQ_ALLOCATED, &accel_dev->status)) {
+		hw_data->free_irq(accel_dev);
+		clear_bit(ADF_STATUS_IRQ_ALLOCATED, &accel_dev->status);
+	}
+
+	/* Delete configuration only if not restarting */
+	if (!test_bit(ADF_STATUS_RESTARTING, &accel_dev->status))
+		adf_cfg_del_all(accel_dev);
+
+	if (hw_data->exit_arb)
+		hw_data->exit_arb(accel_dev);
+
+	if (hw_data->exit_admin_comms)
+		hw_data->exit_admin_comms(accel_dev);
+
+	adf_cleanup_etr_data(accel_dev);
+	adf_dev_restore(accel_dev);
+}
+EXPORT_SYMBOL_GPL(adf_dev_shutdown);
+
+int adf_dev_restarting_notify(struct adf_accel_dev *accel_dev)
+{
+	struct service_hndl *service;
+	struct list_head *list_itr;
+
+	list_for_each(list_itr, &service_table) {
+		service = list_entry(list_itr, struct service_hndl, list);
+		if (service->event_hld(accel_dev, ADF_EVENT_RESTARTING))
+			dev_err(&GET_DEV(accel_dev),
+				"Failed to restart service %s.\n",
+				service->name);
+	}
+	return 0;
+}
+
+int adf_dev_restarted_notify(struct adf_accel_dev *accel_dev)
+{
+	struct service_hndl *service;
+	struct list_head *list_itr;
+
+	list_for_each(list_itr, &service_table) {
+		service = list_entry(list_itr, struct service_hndl, list);
+		if (service->event_hld(accel_dev, ADF_EVENT_RESTARTED))
+			dev_err(&GET_DEV(accel_dev),
+				"Failed to restart service %s.\n",
+				service->name);
+	}
+	return 0;
+}
+
+int adf_dev_shutdown_cache_cfg(struct adf_accel_dev *accel_dev)
+{
+	char services[ADF_CFG_MAX_VAL_LEN_IN_BYTES] = {0};
+	int ret;
+
+	ret = adf_cfg_get_param_value(accel_dev, ADF_GENERAL_SEC,
+				      ADF_SERVICES_ENABLED, services);
+
+	adf_dev_stop(accel_dev);
+	adf_dev_shutdown(accel_dev);
+
+	if (!ret) {
+		ret = adf_cfg_section_add(accel_dev, ADF_GENERAL_SEC);
+		if (ret)
+			return ret;
+
+		ret = adf_cfg_add_key_value_param(accel_dev, ADF_GENERAL_SEC,
+						  ADF_SERVICES_ENABLED,
+						  services, ADF_STR);
+		if (ret)
+			return ret;
+	}
+
+	return 0;
+}
+
+int adf_dev_down(struct adf_accel_dev *accel_dev, bool reconfig)
+{
+	int ret = 0;
+
+	if (!accel_dev)
+		return -EINVAL;
+
+	mutex_lock(&accel_dev->state_lock);
+
+	if (!adf_dev_started(accel_dev)) {
+		dev_info(&GET_DEV(accel_dev), "Device qat_dev%d already down\n",
+			 accel_dev->accel_id);
+		ret = -EINVAL;
+		goto out;
+	}
+
+	if (reconfig) {
+		ret = adf_dev_shutdown_cache_cfg(accel_dev);
+		goto out;
+	}
+
+	adf_dev_stop(accel_dev);
+	adf_dev_shutdown(accel_dev);
+
+out:
+	mutex_unlock(&accel_dev->state_lock);
+	return ret;
+}
+EXPORT_SYMBOL_GPL(adf_dev_down);
+
+int adf_dev_up(struct adf_accel_dev *accel_dev, bool config)
+{
+	int ret = 0;
+
+	if (!accel_dev)
+		return -EINVAL;
+
+	mutex_lock(&accel_dev->state_lock);
+
+	if (adf_dev_started(accel_dev)) {
+		dev_info(&GET_DEV(accel_dev), "Device qat_dev%d already up\n",
+			 accel_dev->accel_id);
+		ret = -EALREADY;
+		goto out;
+	}
+
+	if (config && GET_HW_DATA(accel_dev)->dev_config) {
+		ret = GET_HW_DATA(accel_dev)->dev_config(accel_dev);
+		if (unlikely(ret))
+			goto out;
+	}
+
+	ret = adf_dev_init(accel_dev);
+	if (unlikely(ret))
+		goto out;
+
+	ret = adf_dev_start(accel_dev);
+
+out:
+	mutex_unlock(&accel_dev->state_lock);
+	return ret;
+}
+EXPORT_SYMBOL_GPL(adf_dev_up);