numam-dpdk/drivers/crypto/qat/qat_asym_pmd.c

/* 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 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;
	struct qat_pci_device *qat_dev = internals->qat_dev;

	if (info != NULL) {
		info->max_nb_queue_pairs = qat_qps_per_service(qat_dev,
							QAT_SERVICE_ASYMMETRIC);
		info->feature_flags = dev->feature_flags;
		info->capabilities = internals->qat_dev_capabilities;
		info->driver_id = 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;
	enum qat_device_gen qat_dev_gen = qat_private->qat_dev->qat_dev_gen;

	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(qat_dev_gen, (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;
	struct qat_pci_device *qat_dev = qat_private->qat_dev;
	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(qat_dev, 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.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,

	/* 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 qat_device_info *qat_dev_instance =
			&qat_pci_devs[qat_pci_dev->qat_dev_id];
	struct rte_cryptodev_pmd_init_params init_params = {
			.name = "",
			.socket_id =
				qat_dev_instance->pci_dev->device.numa_node,
			.private_data_size = sizeof(struct qat_asym_dev_private)
	};
	char name[RTE_CRYPTODEV_NAME_MAX_LEN];
	char capa_memz_name[RTE_CRYPTODEV_NAME_MAX_LEN];
	struct rte_cryptodev *cryptodev;
	struct qat_asym_dev_private *internals;

	if (qat_pci_dev->qat_dev_gen == QAT_GEN4) {
		QAT_LOG(ERR, "Asymmetric crypto PMD not supported on QAT 4xxx");
		return -EFAULT;
	}
	if (qat_pci_dev->qat_dev_gen == QAT_GEN3) {
		QAT_LOG(ERR, "Asymmetric crypto PMD not supported on QAT c4xxx");
		return -EFAULT;
	}
	snprintf(name, RTE_CRYPTODEV_NAME_MAX_LEN, "%s_%s",
			qat_pci_dev->name, "asym");
	QAT_LOG(DEBUG, "Creating QAT ASYM device %s\n", name);

	if (rte_eal_process_type() == RTE_PROC_PRIMARY) {
		qat_pci_dev->qat_asym_driver_id =
				qat_asym_driver_id;
	} else if (rte_eal_process_type() == RTE_PROC_SECONDARY) {
		if (qat_pci_dev->qat_asym_driver_id !=
				qat_asym_driver_id) {
			QAT_LOG(ERR,
				"Device %s have different driver id than corresponding device in primary process",
				name);
			return -(EFAULT);
		}
	}

	/* Populate subset device to use in cryptodev device creation */
	qat_dev_instance->asym_rte_dev.driver = &cryptodev_qat_asym_driver;
	qat_dev_instance->asym_rte_dev.numa_node =
			qat_dev_instance->pci_dev->device.numa_node;
	qat_dev_instance->asym_rte_dev.devargs = NULL;

	cryptodev = rte_cryptodev_pmd_create(name,
			&(qat_dev_instance->asym_rte_dev), &init_params);

	if (cryptodev == NULL)
		return -ENODEV;

	qat_dev_instance->asym_rte_dev.name = cryptodev->data->name;
	cryptodev->driver_id = 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;

	if (rte_eal_process_type() != RTE_PROC_PRIMARY)
		return 0;

	snprintf(capa_memz_name, RTE_CRYPTODEV_NAME_MAX_LEN,
			"QAT_ASYM_CAPA_GEN_%d",
			qat_pci_dev->qat_dev_gen);

	internals = cryptodev->data->dev_private;
	internals->qat_dev = qat_pci_dev;
	internals->asym_dev_id = cryptodev->data->dev_id;
	internals->qat_dev_capabilities = qat_gen1_asym_capabilities;

	internals->capa_mz = rte_memzone_lookup(capa_memz_name);
	if (internals->capa_mz == NULL) {
		internals->capa_mz = rte_memzone_reserve(capa_memz_name,
			sizeof(qat_gen1_asym_capabilities),
			rte_socket_id(), 0);
	}
	if (internals->capa_mz == NULL) {
		QAT_LOG(DEBUG,
			"Error allocating memzone for capabilities, destroying PMD for %s",
			name);
		rte_cryptodev_pmd_destroy(cryptodev);
		memset(&qat_dev_instance->asym_rte_dev, 0,
			sizeof(qat_dev_instance->asym_rte_dev));
		return -EFAULT;
	}

	memcpy(internals->capa_mz->addr, qat_gen1_asym_capabilities,
			sizeof(qat_gen1_asym_capabilities));
	internals->qat_dev_capabilities = internals->capa_mz->addr;

	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_pci_dev->asym_dev = internals;
	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;
	if (rte_eal_process_type() == RTE_PROC_PRIMARY)
		rte_memzone_free(qat_pci_dev->asym_dev->capa_mz);

	/* free crypto device */
	cryptodev = rte_cryptodev_pmd_get_dev(
			qat_pci_dev->asym_dev->asym_dev_id);
	rte_cryptodev_pmd_destroy(cryptodev);
	qat_pci_devs[qat_pci_dev->qat_dev_id].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,
		qat_asym_driver_id);