Imported Upstream version 16.04

Change-Id: I77eadcd8538a9122e4773cbe55b24033dc451757
Signed-off-by: C.J. Collier <cjcollier@linuxfoundation.org>

1 files changed, 633 insertions, 0 deletions

diff --git a/drivers/net/ring/rte_eth_ring.c b/drivers/net/ring/rte_eth_ring.c
new file mode 100644
index 00000000..b1783c3e
--- /dev/null
+++ b/drivers/net/ring/rte_eth_ring.c
@@ -0,0 +1,633 @@
+/*-
+ *   BSD LICENSE
+ *
+ *   Copyright(c) 2010-2015 Intel Corporation. All rights reserved.
+ *   All rights reserved.
+ *
+ *   Redistribution and use in source and binary forms, with or without
+ *   modification, are permitted provided that the following conditions
+ *   are met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in
+ *       the documentation and/or other materials provided with the
+ *       distribution.
+ *     * Neither the name of Intel Corporation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "rte_eth_ring.h"
+#include <rte_mbuf.h>
+#include <rte_ethdev.h>
+#include <rte_malloc.h>
+#include <rte_memcpy.h>
+#include <rte_memzone.h>
+#include <rte_string_fns.h>
+#include <rte_dev.h>
+#include <rte_kvargs.h>
+#include <rte_errno.h>
+
+#define ETH_RING_NUMA_NODE_ACTION_ARG	"nodeaction"
+#define ETH_RING_ACTION_CREATE		"CREATE"
+#define ETH_RING_ACTION_ATTACH		"ATTACH"
+
+static const char *valid_arguments[] = {
+	ETH_RING_NUMA_NODE_ACTION_ARG,
+	NULL
+};
+
+enum dev_action {
+	DEV_CREATE,
+	DEV_ATTACH
+};
+
+struct ring_queue {
+	struct rte_ring *rng;
+	rte_atomic64_t rx_pkts;
+	rte_atomic64_t tx_pkts;
+	rte_atomic64_t err_pkts;
+};
+
+struct pmd_internals {
+	unsigned max_rx_queues;
+	unsigned max_tx_queues;
+
+	struct ring_queue rx_ring_queues[RTE_PMD_RING_MAX_RX_RINGS];
+	struct ring_queue tx_ring_queues[RTE_PMD_RING_MAX_TX_RINGS];
+
+	struct ether_addr address;
+	enum dev_action action;
+};
+
+
+static const char *drivername = "Rings PMD";
+static struct rte_eth_link pmd_link = {
+		.link_speed = ETH_SPEED_NUM_10G,
+		.link_duplex = ETH_LINK_FULL_DUPLEX,
+		.link_status = ETH_LINK_DOWN,
+		.link_autoneg = ETH_LINK_SPEED_AUTONEG
+};
+
+static uint16_t
+eth_ring_rx(void *q, struct rte_mbuf **bufs, uint16_t nb_bufs)
+{
+	void **ptrs = (void *)&bufs[0];
+	struct ring_queue *r = q;
+	const uint16_t nb_rx = (uint16_t)rte_ring_dequeue_burst(r->rng,
+			ptrs, nb_bufs);
+	if (r->rng->flags & RING_F_SC_DEQ)
+		r->rx_pkts.cnt += nb_rx;
+	else
+		rte_atomic64_add(&(r->rx_pkts), nb_rx);
+	return nb_rx;
+}
+
+static uint16_t
+eth_ring_tx(void *q, struct rte_mbuf **bufs, uint16_t nb_bufs)
+{
+	void **ptrs = (void *)&bufs[0];
+	struct ring_queue *r = q;
+	const uint16_t nb_tx = (uint16_t)rte_ring_enqueue_burst(r->rng,
+			ptrs, nb_bufs);
+	if (r->rng->flags & RING_F_SP_ENQ) {
+		r->tx_pkts.cnt += nb_tx;
+		r->err_pkts.cnt += nb_bufs - nb_tx;
+	} else {
+		rte_atomic64_add(&(r->tx_pkts), nb_tx);
+		rte_atomic64_add(&(r->err_pkts), nb_bufs - nb_tx);
+	}
+	return nb_tx;
+}
+
+static int
+eth_dev_configure(struct rte_eth_dev *dev __rte_unused) { return 0; }
+
+static int
+eth_dev_start(struct rte_eth_dev *dev)
+{
+	dev->data->dev_link.link_status = ETH_LINK_UP;
+	return 0;
+}
+
+static void
+eth_dev_stop(struct rte_eth_dev *dev)
+{
+	dev->data->dev_link.link_status = ETH_LINK_DOWN;
+}
+
+static int
+eth_dev_set_link_down(struct rte_eth_dev *dev)
+{
+	dev->data->dev_link.link_status = ETH_LINK_DOWN;
+	return 0;
+}
+
+static int
+eth_dev_set_link_up(struct rte_eth_dev *dev)
+{
+	dev->data->dev_link.link_status = ETH_LINK_UP;
+	return 0;
+}
+
+static int
+eth_rx_queue_setup(struct rte_eth_dev *dev, uint16_t rx_queue_id,
+				    uint16_t nb_rx_desc __rte_unused,
+				    unsigned int socket_id __rte_unused,
+				    const struct rte_eth_rxconf *rx_conf __rte_unused,
+				    struct rte_mempool *mb_pool __rte_unused)
+{
+	struct pmd_internals *internals = dev->data->dev_private;
+	dev->data->rx_queues[rx_queue_id] = &internals->rx_ring_queues[rx_queue_id];
+	return 0;
+}
+
+static int
+eth_tx_queue_setup(struct rte_eth_dev *dev, uint16_t tx_queue_id,
+				    uint16_t nb_tx_desc __rte_unused,
+				    unsigned int socket_id __rte_unused,
+				    const struct rte_eth_txconf *tx_conf __rte_unused)
+{
+	struct pmd_internals *internals = dev->data->dev_private;
+	dev->data->tx_queues[tx_queue_id] = &internals->tx_ring_queues[tx_queue_id];
+	return 0;
+}
+
+
+static void
+eth_dev_info(struct rte_eth_dev *dev,
+		struct rte_eth_dev_info *dev_info)
+{
+	struct pmd_internals *internals = dev->data->dev_private;
+	dev_info->driver_name = drivername;
+	dev_info->max_mac_addrs = 1;
+	dev_info->max_rx_pktlen = (uint32_t)-1;
+	dev_info->max_rx_queues = (uint16_t)internals->max_rx_queues;
+	dev_info->max_tx_queues = (uint16_t)internals->max_tx_queues;
+	dev_info->min_rx_bufsize = 0;
+	dev_info->pci_dev = NULL;
+}
+
+static void
+eth_stats_get(struct rte_eth_dev *dev, struct rte_eth_stats *stats)
+{
+	unsigned i;
+	unsigned long rx_total = 0, tx_total = 0, tx_err_total = 0;
+	const struct pmd_internals *internal = dev->data->dev_private;
+
+	for (i = 0; i < RTE_ETHDEV_QUEUE_STAT_CNTRS &&
+			i < dev->data->nb_rx_queues; i++) {
+		stats->q_ipackets[i] = internal->rx_ring_queues[i].rx_pkts.cnt;
+		rx_total += stats->q_ipackets[i];
+	}
+
+	for (i = 0; i < RTE_ETHDEV_QUEUE_STAT_CNTRS &&
+			i < dev->data->nb_tx_queues; i++) {
+		stats->q_opackets[i] = internal->tx_ring_queues[i].tx_pkts.cnt;
+		stats->q_errors[i] = internal->tx_ring_queues[i].err_pkts.cnt;
+		tx_total += stats->q_opackets[i];
+		tx_err_total += stats->q_errors[i];
+	}
+
+	stats->ipackets = rx_total;
+	stats->opackets = tx_total;
+	stats->oerrors = tx_err_total;
+}
+
+static void
+eth_stats_reset(struct rte_eth_dev *dev)
+{
+	unsigned i;
+	struct pmd_internals *internal = dev->data->dev_private;
+	for (i = 0; i < dev->data->nb_rx_queues; i++)
+		internal->rx_ring_queues[i].rx_pkts.cnt = 0;
+	for (i = 0; i < dev->data->nb_tx_queues; i++) {
+		internal->tx_ring_queues[i].tx_pkts.cnt = 0;
+		internal->tx_ring_queues[i].err_pkts.cnt = 0;
+	}
+}
+
+static void
+eth_mac_addr_remove(struct rte_eth_dev *dev __rte_unused,
+	uint32_t index __rte_unused)
+{
+}
+
+static void
+eth_mac_addr_add(struct rte_eth_dev *dev __rte_unused,
+	struct ether_addr *mac_addr __rte_unused,
+	uint32_t index __rte_unused,
+	uint32_t vmdq __rte_unused)
+{
+}
+
+static void
+eth_queue_release(void *q __rte_unused) { ; }
+static int
+eth_link_update(struct rte_eth_dev *dev __rte_unused,
+		int wait_to_complete __rte_unused) { return 0; }
+
+static const struct eth_dev_ops ops = {
+	.dev_start = eth_dev_start,
+	.dev_stop = eth_dev_stop,
+	.dev_set_link_up = eth_dev_set_link_up,
+	.dev_set_link_down = eth_dev_set_link_down,
+	.dev_configure = eth_dev_configure,
+	.dev_infos_get = eth_dev_info,
+	.rx_queue_setup = eth_rx_queue_setup,
+	.tx_queue_setup = eth_tx_queue_setup,
+	.rx_queue_release = eth_queue_release,
+	.tx_queue_release = eth_queue_release,
+	.link_update = eth_link_update,
+	.stats_get = eth_stats_get,
+	.stats_reset = eth_stats_reset,
+	.mac_addr_remove = eth_mac_addr_remove,
+	.mac_addr_add = eth_mac_addr_add,
+};
+
+static int
+do_eth_dev_ring_create(const char *name,
+		struct rte_ring * const rx_queues[], const unsigned nb_rx_queues,
+		struct rte_ring *const tx_queues[], const unsigned nb_tx_queues,
+		const unsigned numa_node, enum dev_action action)
+{
+	struct rte_eth_dev_data *data = NULL;
+	struct pmd_internals *internals = NULL;
+	struct rte_eth_dev *eth_dev = NULL;
+	unsigned i;
+
+	RTE_LOG(INFO, PMD, "Creating rings-backed ethdev on numa socket %u\n",
+			numa_node);
+
+	/* now do all data allocation - for eth_dev structure, dummy pci driver
+	 * and internal (private) data
+	 */
+	data = rte_zmalloc_socket(name, sizeof(*data), 0, numa_node);
+	if (data == NULL) {
+		rte_errno = ENOMEM;
+		goto error;
+	}
+
+	data->rx_queues = rte_zmalloc_socket(name,
+			sizeof(void *) * nb_rx_queues, 0, numa_node);
+	if (data->rx_queues == NULL) {
+		rte_errno = ENOMEM;
+		goto error;
+	}
+
+	data->tx_queues = rte_zmalloc_socket(name,
+			sizeof(void *) * nb_tx_queues, 0, numa_node);
+	if (data->tx_queues == NULL) {
+		rte_errno = ENOMEM;
+		goto error;
+	}
+
+	internals = rte_zmalloc_socket(name, sizeof(*internals), 0, numa_node);
+	if (internals == NULL) {
+		rte_errno = ENOMEM;
+		goto error;
+	}
+
+	/* reserve an ethdev entry */
+	eth_dev = rte_eth_dev_allocate(name, RTE_ETH_DEV_VIRTUAL);
+	if (eth_dev == NULL) {
+		rte_errno = ENOSPC;
+		goto error;
+	}
+
+	/* now put it all together
+	 * - store queue data in internals,
+	 * - store numa_node info in eth_dev_data
+	 * - point eth_dev_data to internals
+	 * - and point eth_dev structure to new eth_dev_data structure
+	 */
+	/* NOTE: we'll replace the data element, of originally allocated eth_dev
+	 * so the rings are local per-process */
+
+	internals->action = action;
+	internals->max_rx_queues = nb_rx_queues;
+	internals->max_tx_queues = nb_tx_queues;
+	for (i = 0; i < nb_rx_queues; i++) {
+		internals->rx_ring_queues[i].rng = rx_queues[i];
+		data->rx_queues[i] = &internals->rx_ring_queues[i];
+	}
+	for (i = 0; i < nb_tx_queues; i++) {
+		internals->tx_ring_queues[i].rng = tx_queues[i];
+		data->tx_queues[i] = &internals->tx_ring_queues[i];
+	}
+
+	data->dev_private = internals;
+	data->port_id = eth_dev->data->port_id;
+	memmove(data->name, eth_dev->data->name, sizeof(data->name));
+	data->nb_rx_queues = (uint16_t)nb_rx_queues;
+	data->nb_tx_queues = (uint16_t)nb_tx_queues;
+	data->dev_link = pmd_link;
+	data->mac_addrs = &internals->address;
+
+	eth_dev->data = data;
+	eth_dev->driver = NULL;
+	eth_dev->dev_ops = &ops;
+	data->dev_flags = RTE_ETH_DEV_DETACHABLE;
+	data->kdrv = RTE_KDRV_NONE;
+	data->drv_name = drivername;
+	data->numa_node = numa_node;
+
+	TAILQ_INIT(&(eth_dev->link_intr_cbs));
+
+	/* finally assign rx and tx ops */
+	eth_dev->rx_pkt_burst = eth_ring_rx;
+	eth_dev->tx_pkt_burst = eth_ring_tx;
+
+	return data->port_id;
+
+error:
+	if (data) {
+		rte_free(data->rx_queues);
+		rte_free(data->tx_queues);
+	}
+	rte_free(data);
+	rte_free(internals);
+
+	return -1;
+}
+
+int
+rte_eth_from_rings(const char *name, struct rte_ring *const rx_queues[],
+		const unsigned nb_rx_queues,
+		struct rte_ring *const tx_queues[],
+		const unsigned nb_tx_queues,
+		const unsigned numa_node)
+{
+	/* do some parameter checking */
+	if (rx_queues == NULL && nb_rx_queues > 0) {
+		rte_errno = EINVAL;
+		return -1;
+	}
+	if (tx_queues == NULL && nb_tx_queues > 0) {
+		rte_errno = EINVAL;
+		return -1;
+	}
+	if (nb_rx_queues > RTE_PMD_RING_MAX_RX_RINGS) {
+		rte_errno = EINVAL;
+		return -1;
+	}
+
+	return do_eth_dev_ring_create(name, rx_queues, nb_rx_queues,
+			tx_queues, nb_tx_queues, numa_node, DEV_ATTACH);
+}
+
+int
+rte_eth_from_ring(struct rte_ring *r)
+{
+	return rte_eth_from_rings(r->name, &r, 1, &r, 1,
+			r->memzone ? r->memzone->socket_id : SOCKET_ID_ANY);
+}
+
+static int
+eth_dev_ring_create(const char *name, const unsigned numa_node,
+		enum dev_action action)
+{
+	/* rx and tx are so-called from point of view of first port.
+	 * They are inverted from the point of view of second port
+	 */
+	struct rte_ring *rxtx[RTE_PMD_RING_MAX_RX_RINGS];
+	unsigned i;
+	char rng_name[RTE_RING_NAMESIZE];
+	unsigned num_rings = RTE_MIN(RTE_PMD_RING_MAX_RX_RINGS,
+			RTE_PMD_RING_MAX_TX_RINGS);
+
+	for (i = 0; i < num_rings; i++) {
+		snprintf(rng_name, sizeof(rng_name), "ETH_RXTX%u_%s", i, name);
+		rxtx[i] = (action == DEV_CREATE) ?
+				rte_ring_create(rng_name, 1024, numa_node,
+						RING_F_SP_ENQ|RING_F_SC_DEQ) :
+				rte_ring_lookup(rng_name);
+		if (rxtx[i] == NULL)
+			return -1;
+	}
+
+	if (do_eth_dev_ring_create(name, rxtx, num_rings, rxtx, num_rings,
+		numa_node, action) < 0)
+		return -1;
+
+	return 0;
+}
+
+struct node_action_pair {
+	char name[PATH_MAX];
+	unsigned node;
+	enum dev_action action;
+};
+
+struct node_action_list {
+	unsigned total;
+	unsigned count;
+	struct node_action_pair *list;
+};
+
+static int parse_kvlist (const char *key __rte_unused, const char *value, void *data)
+{
+	struct node_action_list *info = data;
+	int ret;
+	char *name;
+	char *action;
+	char *node;
+	char *end;
+
+	name = strdup(value);
+
+	ret = -EINVAL;
+
+	if (!name) {
+		RTE_LOG(WARNING, PMD, "command line paramter is empty for ring pmd!\n");
+		goto out;
+	}
+
+	node = strchr(name, ':');
+	if (!node) {
+		RTE_LOG(WARNING, PMD, "could not parse node value from %s", name);
+		goto out;
+	}
+
+	*node = '\0';
+	node++;
+
+	action = strchr(node, ':');
+	if (!action) {
+		RTE_LOG(WARNING, PMD, "could not action value from %s", node);
+		goto out;
+	}
+
+	*action = '\0';
+	action++;
+
+	/*
+	 * Need to do some sanity checking here
+	 */
+
+	if (strcmp(action, ETH_RING_ACTION_ATTACH) == 0)
+		info->list[info->count].action = DEV_ATTACH;
+	else if (strcmp(action, ETH_RING_ACTION_CREATE) == 0)
+		info->list[info->count].action = DEV_CREATE;
+	else
+		goto out;
+
+	errno = 0;
+	info->list[info->count].node = strtol(node, &end, 10);
+
+	if ((errno != 0) || (*end != '\0')) {
+		RTE_LOG(WARNING, PMD, "node value %s is unparseable as a number\n", node);
+		goto out;
+	}
+
+	snprintf(info->list[info->count].name, sizeof(info->list[info->count].name), "%s", name);
+
+	info->count++;
+
+	ret = 0;
+out:
+	free(name);
+	return ret;
+}
+
+static int
+rte_pmd_ring_devinit(const char *name, const char *params)
+{
+	struct rte_kvargs *kvlist = NULL;
+	int ret = 0;
+	struct node_action_list *info = NULL;
+
+	RTE_LOG(INFO, PMD, "Initializing pmd_ring for %s\n", name);
+
+	if (params == NULL || params[0] == '\0') {
+		ret = eth_dev_ring_create(name, rte_socket_id(), DEV_CREATE);
+		if (ret == -1) {
+			RTE_LOG(INFO, PMD,
+				"Attach to pmd_ring for %s\n", name);
+			ret = eth_dev_ring_create(name, rte_socket_id(),
+						  DEV_ATTACH);
+		}
+	}
+	else {
+		kvlist = rte_kvargs_parse(params, valid_arguments);
+
+		if (!kvlist) {
+			RTE_LOG(INFO, PMD, "Ignoring unsupported parameters when creating"
+					" rings-backed ethernet device\n");
+			ret = eth_dev_ring_create(name, rte_socket_id(),
+						  DEV_CREATE);
+			if (ret == -1) {
+				RTE_LOG(INFO, PMD,
+					"Attach to pmd_ring for %s\n",
+					name);
+				ret = eth_dev_ring_create(name, rte_socket_id(),
+							  DEV_ATTACH);
+			}
+			return ret;
+		} else {
+			ret = rte_kvargs_count(kvlist, ETH_RING_NUMA_NODE_ACTION_ARG);
+			info = rte_zmalloc("struct node_action_list",
+					   sizeof(struct node_action_list) +
+					   (sizeof(struct node_action_pair) * ret),
+					   0);
+			if (!info)
+				goto out_free;
+
+			info->total = ret;
+			info->list = (struct node_action_pair*)(info + 1);
+
+			ret = rte_kvargs_process(kvlist, ETH_RING_NUMA_NODE_ACTION_ARG,
+						 parse_kvlist, info);
+
+			if (ret < 0)
+				goto out_free;
+
+			for (info->count = 0; info->count < info->total; info->count++) {
+				ret = eth_dev_ring_create(name,
+							  info->list[info->count].node,
+							  info->list[info->count].action);
+				if ((ret == -1) &&
+				    (info->list[info->count].action == DEV_CREATE)) {
+					RTE_LOG(INFO, PMD,
+						"Attach to pmd_ring for %s\n",
+						name);
+					ret = eth_dev_ring_create(name,
+							info->list[info->count].node,
+							DEV_ATTACH);
+				}
+			}
+		}
+	}
+
+out_free:
+	rte_kvargs_free(kvlist);
+	rte_free(info);
+	return ret;
+}
+
+static int
+rte_pmd_ring_devuninit(const char *name)
+{
+	struct rte_eth_dev *eth_dev = NULL;
+	struct pmd_internals *internals = NULL;
+	struct ring_queue *r = NULL;
+	uint16_t i;
+
+	RTE_LOG(INFO, PMD, "Un-Initializing pmd_ring for %s\n", name);
+
+	if (name == NULL)
+		return -EINVAL;
+
+	/* find an ethdev entry */
+	eth_dev = rte_eth_dev_allocated(name);
+	if (eth_dev == NULL)
+		return -ENODEV;
+
+	eth_dev_stop(eth_dev);
+
+	if (eth_dev->data) {
+		internals = eth_dev->data->dev_private;
+		if (internals->action == DEV_CREATE) {
+			/*
+			 * it is only necessary to delete the rings in rx_queues because
+			 * they are the same used in tx_queues
+			 */
+			for (i = 0; i < eth_dev->data->nb_rx_queues; i++) {
+				r = eth_dev->data->rx_queues[i];
+				rte_ring_free(r->rng);
+			}
+		}
+
+		rte_free(eth_dev->data->rx_queues);
+		rte_free(eth_dev->data->tx_queues);
+		rte_free(eth_dev->data->dev_private);
+	}
+
+	rte_free(eth_dev->data);
+
+	rte_eth_dev_release_port(eth_dev);
+	return 0;
+}
+
+static struct rte_driver pmd_ring_drv = {
+	.name = "eth_ring",
+	.type = PMD_VDEV,
+	.init = rte_pmd_ring_devinit,
+	.uninit = rte_pmd_ring_devuninit,
+};
+
+PMD_REGISTER_DRIVER(pmd_ring_drv);