1 files changed, 356 insertions, 0 deletions

diff --git a/drivers/baseband/null/bbdev_null.c b/drivers/baseband/null/bbdev_null.c
new file mode 100644
index 00000000..2f251510
--- /dev/null
+++ b/drivers/baseband/null/bbdev_null.c
@@ -0,0 +1,356 @@
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright(c) 2017 Intel Corporation
+ */
+
+#include <string.h>
+
+#include <rte_common.h>
+#include <rte_bus_vdev.h>
+#include <rte_malloc.h>
+#include <rte_ring.h>
+#include <rte_kvargs.h>
+
+#include <rte_bbdev.h>
+#include <rte_bbdev_pmd.h>
+
+#define DRIVER_NAME baseband_null
+
+/* NULL BBDev logging ID */
+static int bbdev_null_logtype;
+
+/* Helper macro for logging */
+#define rte_bbdev_log(level, fmt, ...) \
+	rte_log(RTE_LOG_ ## level, bbdev_null_logtype, fmt "\n", ##__VA_ARGS__)
+
+#define rte_bbdev_log_debug(fmt, ...) \
+	rte_bbdev_log(DEBUG, RTE_STR(__LINE__) ":%s() " fmt, __func__, \
+		##__VA_ARGS__)
+
+/*  Initialisation params structure that can be used by null BBDEV driver */
+struct bbdev_null_params {
+	int socket_id;  /*< Null BBDEV socket */
+	uint16_t queues_num;  /*< Null BBDEV queues number */
+};
+
+/* Accecptable params for null BBDEV devices */
+#define BBDEV_NULL_MAX_NB_QUEUES_ARG  "max_nb_queues"
+#define BBDEV_NULL_SOCKET_ID_ARG      "socket_id"
+
+static const char * const bbdev_null_valid_params[] = {
+	BBDEV_NULL_MAX_NB_QUEUES_ARG,
+	BBDEV_NULL_SOCKET_ID_ARG
+};
+
+/* private data structure */
+struct bbdev_private {
+	unsigned int max_nb_queues;  /**< Max number of queues */
+};
+
+/* queue */
+struct bbdev_queue {
+	struct rte_ring *processed_pkts;  /* Ring for processed packets */
+} __rte_cache_aligned;
+
+/* Get device info */
+static void
+info_get(struct rte_bbdev *dev, struct rte_bbdev_driver_info *dev_info)
+{
+	struct bbdev_private *internals = dev->data->dev_private;
+
+	static const struct rte_bbdev_op_cap bbdev_capabilities[] = {
+		RTE_BBDEV_END_OF_CAPABILITIES_LIST(),
+	};
+
+	static struct rte_bbdev_queue_conf default_queue_conf = {
+		.queue_size = RTE_BBDEV_QUEUE_SIZE_LIMIT,
+	};
+
+	default_queue_conf.socket = dev->data->socket_id;
+
+	dev_info->driver_name = RTE_STR(DRIVER_NAME);
+	dev_info->max_num_queues = internals->max_nb_queues;
+	dev_info->queue_size_lim = RTE_BBDEV_QUEUE_SIZE_LIMIT;
+	dev_info->hardware_accelerated = false;
+	dev_info->max_dl_queue_priority = 0;
+	dev_info->max_ul_queue_priority = 0;
+	dev_info->default_queue_conf = default_queue_conf;
+	dev_info->capabilities = bbdev_capabilities;
+	dev_info->cpu_flag_reqs = NULL;
+	dev_info->min_alignment = 0;
+
+	rte_bbdev_log_debug("got device info from %u", dev->data->dev_id);
+}
+
+/* Release queue */
+static int
+q_release(struct rte_bbdev *dev, uint16_t q_id)
+{
+	struct bbdev_queue *q = dev->data->queues[q_id].queue_private;
+
+	if (q != NULL) {
+		rte_ring_free(q->processed_pkts);
+		rte_free(q);
+		dev->data->queues[q_id].queue_private = NULL;
+	}
+
+	rte_bbdev_log_debug("released device queue %u:%u",
+			dev->data->dev_id, q_id);
+	return 0;
+}
+
+/* Setup a queue */
+static int
+q_setup(struct rte_bbdev *dev, uint16_t q_id,
+		const struct rte_bbdev_queue_conf *queue_conf)
+{
+	struct bbdev_queue *q;
+	char ring_name[RTE_RING_NAMESIZE];
+	snprintf(ring_name, RTE_RING_NAMESIZE, RTE_STR(DRIVER_NAME) "%u:%u",
+				dev->data->dev_id, q_id);
+
+	/* Allocate the queue data structure. */
+	q = rte_zmalloc_socket(RTE_STR(DRIVER_NAME), sizeof(*q),
+			RTE_CACHE_LINE_SIZE, queue_conf->socket);
+	if (q == NULL) {
+		rte_bbdev_log(ERR, "Failed to allocate queue memory");
+		return -ENOMEM;
+	}
+
+	q->processed_pkts = rte_ring_create(ring_name, queue_conf->queue_size,
+			queue_conf->socket, RING_F_SP_ENQ | RING_F_SC_DEQ);
+	if (q->processed_pkts == NULL) {
+		rte_bbdev_log(ERR, "Failed to create ring");
+		goto free_q;
+	}
+
+	dev->data->queues[q_id].queue_private = q;
+	rte_bbdev_log_debug("setup device queue %s", ring_name);
+	return 0;
+
+free_q:
+	rte_free(q);
+	return -EFAULT;
+}
+
+static const struct rte_bbdev_ops pmd_ops = {
+	.info_get = info_get,
+	.queue_setup = q_setup,
+	.queue_release = q_release
+};
+
+/* Enqueue decode burst */
+static uint16_t
+enqueue_dec_ops(struct rte_bbdev_queue_data *q_data,
+		struct rte_bbdev_dec_op **ops, uint16_t nb_ops)
+{
+	struct bbdev_queue *q = q_data->queue_private;
+	uint16_t nb_enqueued = rte_ring_enqueue_burst(q->processed_pkts,
+			(void **)ops, nb_ops, NULL);
+
+	q_data->queue_stats.enqueue_err_count += nb_ops - nb_enqueued;
+	q_data->queue_stats.enqueued_count += nb_enqueued;
+
+	return nb_enqueued;
+}
+
+/* Enqueue encode burst */
+static uint16_t
+enqueue_enc_ops(struct rte_bbdev_queue_data *q_data,
+		struct rte_bbdev_enc_op **ops, uint16_t nb_ops)
+{
+	struct bbdev_queue *q = q_data->queue_private;
+	uint16_t nb_enqueued = rte_ring_enqueue_burst(q->processed_pkts,
+			(void **)ops, nb_ops, NULL);
+
+	q_data->queue_stats.enqueue_err_count += nb_ops - nb_enqueued;
+	q_data->queue_stats.enqueued_count += nb_enqueued;
+
+	return nb_enqueued;
+}
+
+/* Dequeue decode burst */
+static uint16_t
+dequeue_dec_ops(struct rte_bbdev_queue_data *q_data,
+		struct rte_bbdev_dec_op **ops, uint16_t nb_ops)
+{
+	struct bbdev_queue *q = q_data->queue_private;
+	uint16_t nb_dequeued = rte_ring_dequeue_burst(q->processed_pkts,
+			(void **)ops, nb_ops, NULL);
+	q_data->queue_stats.dequeued_count += nb_dequeued;
+
+	return nb_dequeued;
+}
+
+/* Dequeue encode burst */
+static uint16_t
+dequeue_enc_ops(struct rte_bbdev_queue_data *q_data,
+		struct rte_bbdev_enc_op **ops, uint16_t nb_ops)
+{
+	struct bbdev_queue *q = q_data->queue_private;
+	uint16_t nb_dequeued = rte_ring_dequeue_burst(q->processed_pkts,
+			(void **)ops, nb_ops, NULL);
+	q_data->queue_stats.dequeued_count += nb_dequeued;
+
+	return nb_dequeued;
+}
+
+/* Parse 16bit integer from string argument */
+static inline int
+parse_u16_arg(const char *key, const char *value, void *extra_args)
+{
+	uint16_t *u16 = extra_args;
+	unsigned int long result;
+
+	if ((value == NULL) || (extra_args == NULL))
+		return -EINVAL;
+	errno = 0;
+	result = strtoul(value, NULL, 0);
+	if ((result >= (1 << 16)) || (errno != 0)) {
+		rte_bbdev_log(ERR, "Invalid value %lu for %s", result, key);
+		return -ERANGE;
+	}
+	*u16 = (uint16_t)result;
+	return 0;
+}
+
+/* Parse parameters used to create device */
+static int
+parse_bbdev_null_params(struct bbdev_null_params *params,
+		const char *input_args)
+{
+	struct rte_kvargs *kvlist = NULL;
+	int ret = 0;
+
+	if (params == NULL)
+		return -EINVAL;
+	if (input_args) {
+		kvlist = rte_kvargs_parse(input_args, bbdev_null_valid_params);
+		if (kvlist == NULL)
+			return -EFAULT;
+
+		ret = rte_kvargs_process(kvlist, bbdev_null_valid_params[0],
+					&parse_u16_arg, &params->queues_num);
+		if (ret < 0)
+			goto exit;
+
+		ret = rte_kvargs_process(kvlist, bbdev_null_valid_params[1],
+					&parse_u16_arg, &params->socket_id);
+		if (ret < 0)
+			goto exit;
+
+		if (params->socket_id >= RTE_MAX_NUMA_NODES) {
+			rte_bbdev_log(ERR, "Invalid socket, must be < %u",
+					RTE_MAX_NUMA_NODES);
+			goto exit;
+		}
+	}
+
+exit:
+	if (kvlist)
+		rte_kvargs_free(kvlist);
+	return ret;
+}
+
+/* Create device */
+static int
+null_bbdev_create(struct rte_vdev_device *vdev,
+		struct bbdev_null_params *init_params)
+{
+	struct rte_bbdev *bbdev;
+	const char *name = rte_vdev_device_name(vdev);
+
+	bbdev = rte_bbdev_allocate(name);
+	if (bbdev == NULL)
+		return -ENODEV;
+
+	bbdev->data->dev_private = rte_zmalloc_socket(name,
+			sizeof(struct bbdev_private), RTE_CACHE_LINE_SIZE,
+			init_params->socket_id);
+	if (bbdev->data->dev_private == NULL) {
+		rte_bbdev_release(bbdev);
+		return -ENOMEM;
+	}
+
+	bbdev->dev_ops = &pmd_ops;
+	bbdev->device = &vdev->device;
+	bbdev->data->socket_id = init_params->socket_id;
+	bbdev->intr_handle = NULL;
+
+	/* register rx/tx burst functions for data path */
+	bbdev->dequeue_enc_ops = dequeue_enc_ops;
+	bbdev->dequeue_dec_ops = dequeue_dec_ops;
+	bbdev->enqueue_enc_ops = enqueue_enc_ops;
+	bbdev->enqueue_dec_ops = enqueue_dec_ops;
+	((struct bbdev_private *) bbdev->data->dev_private)->max_nb_queues =
+			init_params->queues_num;
+
+	return 0;
+}
+
+/* Initialise device */
+static int
+null_bbdev_probe(struct rte_vdev_device *vdev)
+{
+	struct bbdev_null_params init_params = {
+		rte_socket_id(),
+		RTE_BBDEV_DEFAULT_MAX_NB_QUEUES
+	};
+	const char *name;
+	const char *input_args;
+
+	if (vdev == NULL)
+		return -EINVAL;
+
+	name = rte_vdev_device_name(vdev);
+	if (name == NULL)
+		return -EINVAL;
+
+	input_args = rte_vdev_device_args(vdev);
+	parse_bbdev_null_params(&init_params, input_args);
+
+	rte_bbdev_log_debug("Init %s on NUMA node %d with max queues: %d",
+			name, init_params.socket_id, init_params.queues_num);
+
+	return null_bbdev_create(vdev, &init_params);
+}
+
+/* Uninitialise device */
+static int
+null_bbdev_remove(struct rte_vdev_device *vdev)
+{
+	struct rte_bbdev *bbdev;
+	const char *name;
+
+	if (vdev == NULL)
+		return -EINVAL;
+
+	name = rte_vdev_device_name(vdev);
+	if (name == NULL)
+		return -EINVAL;
+
+	bbdev = rte_bbdev_get_named_dev(name);
+	if (bbdev == NULL)
+		return -EINVAL;
+
+	rte_free(bbdev->data->dev_private);
+
+	return rte_bbdev_release(bbdev);
+}
+
+static struct rte_vdev_driver bbdev_null_pmd_drv = {
+	.probe = null_bbdev_probe,
+	.remove = null_bbdev_remove
+};
+
+RTE_PMD_REGISTER_VDEV(DRIVER_NAME, bbdev_null_pmd_drv);
+RTE_PMD_REGISTER_PARAM_STRING(DRIVER_NAME,
+	BBDEV_NULL_MAX_NB_QUEUES_ARG"=<int> "
+	BBDEV_NULL_SOCKET_ID_ARG"=<int>");
+RTE_PMD_REGISTER_ALIAS(DRIVER_NAME, bbdev_null);
+
+RTE_INIT(null_bbdev_init_log)
+{
+	bbdev_null_logtype = rte_log_register("pmd.bb.null");
+	if (bbdev_null_logtype >= 0)
+		rte_log_set_level(bbdev_null_logtype, RTE_LOG_NOTICE);
+}