text: /* SPDX-License-Identifier: BSD-3-Clause
   * Copyright(c) 2019 Intel Corporation
   */
  
  #include <rte_cryptodev_pmd.h>
  
  #include "qat_logs.h"
  
  #include "qat_asym.h"
  #include "qat_asym_pmd.h"
  #include "qat_sym_capabilities.h"
  #include "qat_asym_capabilities.h"
  
  uint8_t cryptodev_qat_asym_driver_id;
  
  static const struct rte_cryptodev_capabilities qat_gen1_asym_capabilities[] = {
  	QAT_BASE_GEN1_ASYM_CAPABILITIES,
  	RTE_CRYPTODEV_END_OF_CAPABILITIES_LIST()
  };
  
  static int qat_asym_qp_release(struct rte_cryptodev *dev,
  			       uint16_t queue_pair_id);
  
  static int qat_asym_dev_config(__rte_unused struct rte_cryptodev *dev,
  			       __rte_unused struct rte_cryptodev_config *config)
  {
  	return 0;
  }
  
  static int qat_asym_dev_start(__rte_unused struct rte_cryptodev *dev)
  {
  	return 0;
  }
  
  static void qat_asym_dev_stop(__rte_unused struct rte_cryptodev *dev)
  {
  
  }
  
  static int qat_asym_dev_close(struct rte_cryptodev *dev)
  {
  	int i, ret;
  
  	for (i = 0; i < dev->data->nb_queue_pairs; i++) {
  		ret = qat_asym_qp_release(dev, i);
  		if (ret < 0)
  			return ret;
  	}
  
  	return 0;
  }
  
  static void qat_asym_dev_info_get(struct rte_cryptodev *dev,
  				  struct rte_cryptodev_info *info)
  {
  	struct qat_asym_dev_private *internals = dev->data->dev_private;
  	const struct qat_qp_hw_data *asym_hw_qps =
  		qat_gen_config[internals->qat_dev->qat_dev_gen]
  			      .qp_hw_data[QAT_SERVICE_ASYMMETRIC];
  
  	if (info != NULL) {
  		info->max_nb_queue_pairs = qat_qps_per_service(asym_hw_qps,
  							QAT_SERVICE_ASYMMETRIC);
  		info->feature_flags = dev->feature_flags;
  		info->capabilities = internals->qat_dev_capabilities;
  		info->driver_id = cryptodev_qat_asym_driver_id;
  		/* No limit of number of sessions */
  		info->sym.max_nb_sessions = 0;
  	}
  }
  
  static void qat_asym_stats_get(struct rte_cryptodev *dev,
  			       struct rte_cryptodev_stats *stats)
  {
  	struct qat_common_stats qat_stats = {0};
  	struct qat_asym_dev_private *qat_priv;
  
  	if (stats == NULL || dev == NULL) {
  		QAT_LOG(ERR, "invalid ptr: stats %p, dev %p", stats, dev);
  		return;
  	}
  	qat_priv = dev->data->dev_private;
  
  	qat_stats_get(qat_priv->qat_dev, &qat_stats, QAT_SERVICE_ASYMMETRIC);
  	stats->enqueued_count = qat_stats.enqueued_count;
  	stats->dequeued_count = qat_stats.dequeued_count;
  	stats->enqueue_err_count = qat_stats.enqueue_err_count;
  	stats->dequeue_err_count = qat_stats.dequeue_err_count;
  }
  
  static void qat_asym_stats_reset(struct rte_cryptodev *dev)
  {
  	struct qat_asym_dev_private *qat_priv;
  
  	if (dev == NULL) {
  		QAT_LOG(ERR, "invalid asymmetric cryptodev ptr %p", dev);
  		return;
  	}
  	qat_priv = dev->data->dev_private;
  
  	qat_stats_reset(qat_priv->qat_dev, QAT_SERVICE_ASYMMETRIC);
  }
  
  static int qat_asym_qp_release(struct rte_cryptodev *dev,
  			       uint16_t queue_pair_id)
  {
  	struct qat_asym_dev_private *qat_private = dev->data->dev_private;
  
  	QAT_LOG(DEBUG, "Release asym qp %u on device %d",
  				queue_pair_id, dev->data->dev_id);
  
  	qat_private->qat_dev->qps_in_use[QAT_SERVICE_ASYMMETRIC][queue_pair_id]
  						= NULL;
  
  	return qat_qp_release((struct qat_qp **)
  			&(dev->data->queue_pairs[queue_pair_id]));
  }
  
  static int qat_asym_qp_setup(struct rte_cryptodev *dev, uint16_t qp_id,
  			     const struct rte_cryptodev_qp_conf *qp_conf,
  			     int socket_id)
  {
  	struct qat_qp_config qat_qp_conf;
  	struct qat_qp *qp;
  	int ret = 0;
  	uint32_t i;
  
  	struct qat_qp **qp_addr =
  			(struct qat_qp **)&(dev->data->queue_pairs[qp_id]);
  	struct qat_asym_dev_private *qat_private = dev->data->dev_private;
  	const struct qat_qp_hw_data *asym_hw_qps =
  			qat_gen_config[qat_private->qat_dev->qat_dev_gen]
  				      .qp_hw_data[QAT_SERVICE_ASYMMETRIC];
  	const struct qat_qp_hw_data *qp_hw_data = asym_hw_qps + qp_id;
  
  	/* If qp is already in use free ring memory and qp metadata. */
  	if (*qp_addr != NULL) {
  		ret = qat_asym_qp_release(dev, qp_id);
  		if (ret < 0)
  			return ret;
  	}
  	if (qp_id >= qat_qps_per_service(asym_hw_qps, QAT_SERVICE_ASYMMETRIC)) {
  		QAT_LOG(ERR, "qp_id %u invalid for this device", qp_id);
  		return -EINVAL;
  	}
  
  	qat_qp_conf.hw = qp_hw_data;
  	qat_qp_conf.build_request = qat_asym_build_request;
  	qat_qp_conf.cookie_size = sizeof(struct qat_asym_op_cookie);
  	qat_qp_conf.nb_descriptors = qp_conf->nb_descriptors;
  	qat_qp_conf.socket_id = socket_id;
  	qat_qp_conf.service_str = "asym";
  
  	ret = qat_qp_setup(qat_private->qat_dev, qp_addr, qp_id, &qat_qp_conf);
  	if (ret != 0)
  		return ret;
  
  	/* store a link to the qp in the qat_pci_device */
  	qat_private->qat_dev->qps_in_use[QAT_SERVICE_ASYMMETRIC][qp_id]
  							= *qp_addr;
  
  	qp = (struct qat_qp *)*qp_addr;
  	qp->min_enq_burst_threshold = qat_private->min_enq_burst_threshold;
  
  	for (i = 0; i < qp->nb_descriptors; i++) {
  		int j;
  
  		struct qat_asym_op_cookie __rte_unused *cookie =
  				qp->op_cookies[i];
  		cookie->input_addr = rte_mempool_virt2iova(cookie) +
  				offsetof(struct qat_asym_op_cookie,
  						input_params_ptrs);
  
  		cookie->output_addr = rte_mempool_virt2iova(cookie) +
  				offsetof(struct qat_asym_op_cookie,
  						output_params_ptrs);
  
  		for (j = 0; j < 8; j++) {
  			cookie->input_params_ptrs[j] =
  					rte_mempool_virt2iova(cookie) +
  					offsetof(struct qat_asym_op_cookie,
  							input_array[j]);
  			cookie->output_params_ptrs[j] =
  					rte_mempool_virt2iova(cookie) +
  					offsetof(struct qat_asym_op_cookie,
  							output_array[j]);
  		}
  	}
  
  	return ret;
  }
  
  struct rte_cryptodev_ops crypto_qat_ops = {
  
  	/* Device related operations */
  	.dev_configure		= qat_asym_dev_config,
  	.dev_start		= qat_asym_dev_start,
  	.dev_stop		= qat_asym_dev_stop,
  	.dev_close		= qat_asym_dev_close,
  	.dev_infos_get		= qat_asym_dev_info_get,
  
  	.stats_get		= qat_asym_stats_get,
  	.stats_reset		= qat_asym_stats_reset,
  	.queue_pair_setup	= qat_asym_qp_setup,
  	.queue_pair_release	= qat_asym_qp_release,
  	.queue_pair_count	= NULL,
  
  	/* Crypto related operations */
  	.asym_session_get_size	= qat_asym_session_get_private_size,
  	.asym_session_configure	= qat_asym_session_configure,
  	.asym_session_clear	= qat_asym_session_clear
  };
  
  uint16_t qat_asym_pmd_enqueue_op_burst(void *qp, struct rte_crypto_op **ops,
  				       uint16_t nb_ops)
  {
  	return qat_enqueue_op_burst(qp, (void **)ops, nb_ops);
  }
  
  uint16_t qat_asym_pmd_dequeue_op_burst(void *qp, struct rte_crypto_op **ops,
  				       uint16_t nb_ops)
  {
  	return qat_dequeue_op_burst(qp, (void **)ops, nb_ops);
  }
  
  /* An rte_driver is needed in the registration of both the device and the driver
   * with cryptodev.
   * The actual qat pci's rte_driver can't be used as its name represents
   * the whole pci device with all services. Think of this as a holder for a name
   * for the crypto part of the pci device.
   */
  static const char qat_asym_drv_name[] = RTE_STR(CRYPTODEV_NAME_QAT_ASYM_PMD);
  static const struct rte_driver cryptodev_qat_asym_driver = {
  	.name = qat_asym_drv_name,
  	.alias = qat_asym_drv_name
  };
  
  int
  qat_asym_dev_create(struct qat_pci_device *qat_pci_dev,
  		struct qat_dev_cmd_param *qat_dev_cmd_param)
  {
  	int i = 0;
  	struct rte_cryptodev_pmd_init_params init_params = {
  			.name = "",
  			.socket_id = qat_pci_dev->pci_dev->device.numa_node,
  			.private_data_size = sizeof(struct qat_asym_dev_private)
  	};
  	char name[RTE_CRYPTODEV_NAME_MAX_LEN];
  	struct rte_cryptodev *cryptodev;
  	struct qat_asym_dev_private *internals;
  
  	snprintf(name, RTE_CRYPTODEV_NAME_MAX_LEN, "%s_%s",
  			qat_pci_dev->name, "asym");
  	QAT_LOG(DEBUG, "Creating QAT ASYM device %s\n", name);
  
  	/* Populate subset device to use in cryptodev device creation */
  	qat_pci_dev->asym_rte_dev.driver = &cryptodev_qat_asym_driver;
  	qat_pci_dev->asym_rte_dev.numa_node =
  				qat_pci_dev->pci_dev->device.numa_node;
  	qat_pci_dev->asym_rte_dev.devargs = NULL;
  
  	cryptodev = rte_cryptodev_pmd_create(name,
  			&(qat_pci_dev->asym_rte_dev), &init_params);
  
  	if (cryptodev == NULL)
  		return -ENODEV;
  
  	qat_pci_dev->asym_rte_dev.name = cryptodev->data->name;
  	cryptodev->driver_id = cryptodev_qat_asym_driver_id;
  	cryptodev->dev_ops = &crypto_qat_ops;
  
  	cryptodev->enqueue_burst = qat_asym_pmd_enqueue_op_burst;
  	cryptodev->dequeue_burst = qat_asym_pmd_dequeue_op_burst;
  
  	cryptodev->feature_flags = RTE_CRYPTODEV_FF_ASYMMETRIC_CRYPTO |
  			RTE_CRYPTODEV_FF_HW_ACCELERATED |
  			RTE_CRYPTODEV_FF_ASYM_SESSIONLESS |
  			RTE_CRYPTODEV_FF_RSA_PRIV_OP_KEY_EXP |
  			RTE_CRYPTODEV_FF_RSA_PRIV_OP_KEY_QT;
  	internals = cryptodev->data->dev_private;
  	internals->qat_dev = qat_pci_dev;
  	qat_pci_dev->asym_dev = internals;
  
  	internals->asym_dev_id = cryptodev->data->dev_id;
  	internals->qat_dev_capabilities = qat_gen1_asym_capabilities;
  
  	while (1) {
  		if (qat_dev_cmd_param[i].name == NULL)
  			break;
  		if (!strcmp(qat_dev_cmd_param[i].name, ASYM_ENQ_THRESHOLD_NAME))
  			internals->min_enq_burst_threshold =
  					qat_dev_cmd_param[i].val;
  		i++;
  	}
  
  	QAT_LOG(DEBUG, "Created QAT ASYM device %s as cryptodev instance %d",
  			cryptodev->data->name, internals->asym_dev_id);
  	return 0;
  }
  
  int
  qat_asym_dev_destroy(struct qat_pci_device *qat_pci_dev)
  {
  	struct rte_cryptodev *cryptodev;
  
  	if (qat_pci_dev == NULL)
  		return -ENODEV;
  	if (qat_pci_dev->asym_dev == NULL)
  		return 0;
  
  	/* free crypto device */
  	cryptodev = rte_cryptodev_pmd_get_dev(
  			qat_pci_dev->asym_dev->asym_dev_id);
  	rte_cryptodev_pmd_destroy(cryptodev);
  	qat_pci_dev->asym_rte_dev.name = NULL;
  	qat_pci_dev->asym_dev = NULL;
  
  	return 0;
  }
  
  static struct cryptodev_driver qat_crypto_drv;
  RTE_PMD_REGISTER_CRYPTO_DRIVER(qat_crypto_drv,
  		cryptodev_qat_asym_driver,
  		cryptodev_qat_asym_driver_id);
  