1 files changed, 299 insertions, 0 deletions

diff --git a/drivers/net/failsafe/failsafe.c b/drivers/net/failsafe/failsafe.c
new file mode 100644
index 00000000..6006bef8
--- /dev/null
+++ b/drivers/net/failsafe/failsafe.c
@@ -0,0 +1,299 @@
+/*-
+ *   BSD LICENSE
+ *
+ *   Copyright 2017 6WIND S.A.
+ *   Copyright 2017 Mellanox.
+ *
+ *   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 6WIND S.A. 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_alarm.h>
+#include <rte_malloc.h>
+#include <rte_ethdev.h>
+#include <rte_ethdev_vdev.h>
+#include <rte_devargs.h>
+#include <rte_kvargs.h>
+#include <rte_vdev.h>
+
+#include "failsafe_private.h"
+
+const char pmd_failsafe_driver_name[] = FAILSAFE_DRIVER_NAME;
+static const struct rte_eth_link eth_link = {
+	.link_speed = ETH_SPEED_NUM_10G,
+	.link_duplex = ETH_LINK_FULL_DUPLEX,
+	.link_status = ETH_LINK_UP,
+	.link_autoneg = ETH_LINK_SPEED_AUTONEG,
+};
+
+static int
+fs_sub_device_alloc(struct rte_eth_dev *dev,
+		const char *params)
+{
+	uint8_t nb_subs;
+	int ret;
+
+	ret = failsafe_args_count_subdevice(dev, params);
+	if (ret)
+		return ret;
+	if (PRIV(dev)->subs_tail > FAILSAFE_MAX_ETHPORTS) {
+		ERROR("Cannot allocate more than %d ports",
+			FAILSAFE_MAX_ETHPORTS);
+		return -ENOSPC;
+	}
+	nb_subs = PRIV(dev)->subs_tail;
+	PRIV(dev)->subs = rte_zmalloc(NULL,
+			sizeof(struct sub_device) * nb_subs,
+			RTE_CACHE_LINE_SIZE);
+	if (PRIV(dev)->subs == NULL) {
+		ERROR("Could not allocate sub_devices");
+		return -ENOMEM;
+	}
+	return 0;
+}
+
+static void
+fs_sub_device_free(struct rte_eth_dev *dev)
+{
+	rte_free(PRIV(dev)->subs);
+}
+
+static void fs_hotplug_alarm(void *arg);
+
+int
+failsafe_hotplug_alarm_install(struct rte_eth_dev *dev)
+{
+	int ret;
+
+	if (dev == NULL)
+		return -EINVAL;
+	if (PRIV(dev)->pending_alarm)
+		return 0;
+	ret = rte_eal_alarm_set(hotplug_poll * 1000,
+				fs_hotplug_alarm,
+				dev);
+	if (ret) {
+		ERROR("Could not set up plug-in event detection");
+		return ret;
+	}
+	PRIV(dev)->pending_alarm = 1;
+	return 0;
+}
+
+int
+failsafe_hotplug_alarm_cancel(struct rte_eth_dev *dev)
+{
+	int ret = 0;
+
+	if (PRIV(dev)->pending_alarm) {
+		rte_errno = 0;
+		rte_eal_alarm_cancel(fs_hotplug_alarm, dev);
+		if (rte_errno) {
+			ERROR("rte_eal_alarm_cancel failed (errno: %s)",
+			      strerror(rte_errno));
+			ret = -rte_errno;
+		} else {
+			PRIV(dev)->pending_alarm = 0;
+		}
+	}
+	return ret;
+}
+
+static void
+fs_hotplug_alarm(void *arg)
+{
+	struct rte_eth_dev *dev = arg;
+	struct sub_device *sdev;
+	int ret;
+	uint8_t i;
+
+	if (!PRIV(dev)->pending_alarm)
+		return;
+	PRIV(dev)->pending_alarm = 0;
+	FOREACH_SUBDEV(sdev, i, dev)
+		if (sdev->state != PRIV(dev)->state)
+			break;
+	/* if we have non-probed device */
+	if (i != PRIV(dev)->subs_tail) {
+		ret = failsafe_eth_dev_state_sync(dev);
+		if (ret)
+			ERROR("Unable to synchronize sub_device state");
+	}
+	failsafe_dev_remove(dev);
+	ret = failsafe_hotplug_alarm_install(dev);
+	if (ret)
+		ERROR("Unable to set up next alarm");
+}
+
+static int
+fs_eth_dev_create(struct rte_vdev_device *vdev)
+{
+	struct rte_eth_dev *dev;
+	struct ether_addr *mac;
+	struct fs_priv *priv;
+	struct sub_device *sdev;
+	const char *params;
+	unsigned int socket_id;
+	uint8_t i;
+	int ret;
+
+	dev = NULL;
+	priv = NULL;
+	socket_id = rte_socket_id();
+	INFO("Creating fail-safe device on NUMA socket %u", socket_id);
+	params = rte_vdev_device_args(vdev);
+	if (params == NULL) {
+		ERROR("This PMD requires sub-devices, none provided");
+		return -1;
+	}
+	dev = rte_eth_vdev_allocate(vdev, sizeof(*priv));
+	if (dev == NULL) {
+		ERROR("Unable to allocate rte_eth_dev");
+		return -1;
+	}
+	priv = PRIV(dev);
+	priv->dev = dev;
+	dev->dev_ops = &failsafe_ops;
+	dev->data->mac_addrs = &PRIV(dev)->mac_addrs[0];
+	dev->data->dev_link = eth_link;
+	PRIV(dev)->nb_mac_addr = 1;
+	TAILQ_INIT(&PRIV(dev)->flow_list);
+	dev->rx_pkt_burst = (eth_rx_burst_t)&failsafe_rx_burst;
+	dev->tx_pkt_burst = (eth_tx_burst_t)&failsafe_tx_burst;
+	ret = fs_sub_device_alloc(dev, params);
+	if (ret) {
+		ERROR("Could not allocate sub_devices");
+		goto free_dev;
+	}
+	ret = failsafe_args_parse(dev, params);
+	if (ret)
+		goto free_subs;
+	ret = failsafe_eal_init(dev);
+	if (ret)
+		goto free_args;
+	ret = failsafe_hotplug_alarm_install(dev);
+	if (ret) {
+		ERROR("Could not set up plug-in event detection");
+		goto free_args;
+	}
+	mac = &dev->data->mac_addrs[0];
+	if (mac_from_arg) {
+		/*
+		 * If MAC address was provided as a parameter,
+		 * apply to all probed slaves.
+		 */
+		FOREACH_SUBDEV_STATE(sdev, i, dev, DEV_PROBED) {
+			ret = rte_eth_dev_default_mac_addr_set(PORT_ID(sdev),
+							       mac);
+			if (ret) {
+				ERROR("Failed to set default MAC address");
+				goto free_args;
+			}
+		}
+	} else {
+		/*
+		 * Use the ether_addr from first probed
+		 * device, either preferred or fallback.
+		 */
+		FOREACH_SUBDEV(sdev, i, dev)
+			if (sdev->state >= DEV_PROBED) {
+				ether_addr_copy(&ETH(sdev)->data->mac_addrs[0],
+						mac);
+				break;
+			}
+		/*
+		 * If no device has been probed and no ether_addr
+		 * has been provided on the command line, use a random
+		 * valid one.
+		 * It will be applied during future slave state syncs to
+		 * probed slaves.
+		 */
+		if (i == priv->subs_tail)
+			eth_random_addr(&mac->addr_bytes[0]);
+	}
+	INFO("MAC address is %02x:%02x:%02x:%02x:%02x:%02x",
+		mac->addr_bytes[0], mac->addr_bytes[1],
+		mac->addr_bytes[2], mac->addr_bytes[3],
+		mac->addr_bytes[4], mac->addr_bytes[5]);
+	dev->data->dev_flags |= RTE_ETH_DEV_INTR_LSC;
+	return 0;
+free_args:
+	failsafe_args_free(dev);
+free_subs:
+	fs_sub_device_free(dev);
+free_dev:
+	rte_free(PRIV(dev));
+	rte_eth_dev_release_port(dev);
+	return -1;
+}
+
+static int
+fs_rte_eth_free(const char *name)
+{
+	struct rte_eth_dev *dev;
+	int ret;
+
+	dev = rte_eth_dev_allocated(name);
+	if (dev == NULL)
+		return -ENODEV;
+	ret = failsafe_eal_uninit(dev);
+	if (ret)
+		ERROR("Error while uninitializing sub-EAL");
+	failsafe_args_free(dev);
+	fs_sub_device_free(dev);
+	rte_free(PRIV(dev));
+	rte_eth_dev_release_port(dev);
+	return ret;
+}
+
+static int
+rte_pmd_failsafe_probe(struct rte_vdev_device *vdev)
+{
+	const char *name;
+
+	name = rte_vdev_device_name(vdev);
+	INFO("Initializing " FAILSAFE_DRIVER_NAME " for %s",
+			name);
+	return fs_eth_dev_create(vdev);
+}
+
+static int
+rte_pmd_failsafe_remove(struct rte_vdev_device *vdev)
+{
+	const char *name;
+
+	name = rte_vdev_device_name(vdev);
+	INFO("Uninitializing " FAILSAFE_DRIVER_NAME " for %s", name);
+	return fs_rte_eth_free(name);
+}
+
+static struct rte_vdev_driver failsafe_drv = {
+	.probe = rte_pmd_failsafe_probe,
+	.remove = rte_pmd_failsafe_remove,
+};
+
+RTE_PMD_REGISTER_VDEV(net_failsafe, failsafe_drv);
+RTE_PMD_REGISTER_PARAM_STRING(net_failsafe, PMD_FAILSAFE_PARAM_STRING);