[PATCH v11 06/11] net/failsafe: support flow API

[Gaetan Rivet <gaetan.rivet@6wind.com>]

Signed-off-by: Gaetan Rivet <gaetan.rivet@6wind.com>
Acked-by: Olga Shern <olgas@mellanox.com>
---
 doc/guides/nics/features/failsafe.ini   |   1 +
 drivers/net/failsafe/Makefile           |   1 +
 drivers/net/failsafe/failsafe.c         |   1 +
 drivers/net/failsafe/failsafe_eal.c     |   1 +
 drivers/net/failsafe/failsafe_ether.c   |  70 +++++++++++
 drivers/net/failsafe/failsafe_flow.c    | 215 ++++++++++++++++++++++++++++++++
 drivers/net/failsafe/failsafe_ops.c     |  29 +++++
 drivers/net/failsafe/failsafe_private.h |  18 +++
 8 files changed, 336 insertions(+)
 create mode 100644 drivers/net/failsafe/failsafe_flow.c

diff --git a/doc/guides/nics/features/failsafe.ini b/doc/guides/nics/features/failsafe.ini
index cf3e1af..2e802aa 100644
--- a/doc/guides/nics/features/failsafe.ini
+++ b/doc/guides/nics/features/failsafe.ini
@@ -13,6 +13,7 @@ Unicast MAC filter   = Y
 Multicast MAC filter = Y
 VLAN filter          = Y
 Flow control         = Y
+Flow API             = Y
 Packet type parsing  = Y
 Basic stats          = Y
 Stats per queue      = Y
diff --git a/drivers/net/failsafe/Makefile b/drivers/net/failsafe/Makefile
index 3488198..cec33df 100644
--- a/drivers/net/failsafe/Makefile
+++ b/drivers/net/failsafe/Makefile
@@ -45,6 +45,7 @@ SRCS-$(CONFIG_RTE_LIBRTE_PMD_FAILSAFE) += failsafe_eal.c
 SRCS-$(CONFIG_RTE_LIBRTE_PMD_FAILSAFE) += failsafe_ops.c
 SRCS-$(CONFIG_RTE_LIBRTE_PMD_FAILSAFE) += failsafe_rxtx.c
 SRCS-$(CONFIG_RTE_LIBRTE_PMD_FAILSAFE) += failsafe_ether.c
+SRCS-$(CONFIG_RTE_LIBRTE_PMD_FAILSAFE) += failsafe_flow.c
 
 # No exported include files
 
diff --git a/drivers/net/failsafe/failsafe.c b/drivers/net/failsafe/failsafe.c
index 8db6355..12d79ac 100644
--- a/drivers/net/failsafe/failsafe.c
+++ b/drivers/net/failsafe/failsafe.c
@@ -179,6 +179,7 @@ fs_eth_dev_create(struct rte_vdev_device *vdev)
 	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);
diff --git a/drivers/net/failsafe/failsafe_eal.c b/drivers/net/failsafe/failsafe_eal.c
index 8a3836c..d11ea67 100644
--- a/drivers/net/failsafe/failsafe_eal.c
+++ b/drivers/net/failsafe/failsafe_eal.c
@@ -62,6 +62,7 @@ fs_bus_init(struct rte_eth_dev *dev)
 			ERROR("sub_device %d init went wrong", i);
 			return -ENODEV;
 		}
+		SUB_ID(sdev) = i;
 		sdev->dev = ETH(sdev)->device;
 		ETH(sdev)->state = RTE_ETH_DEV_DEFERRED;
 		sdev->state = DEV_PROBED;
diff --git a/drivers/net/failsafe/failsafe_ether.c b/drivers/net/failsafe/failsafe_ether.c
index 2a1535e..2958207 100644
--- a/drivers/net/failsafe/failsafe_ether.c
+++ b/drivers/net/failsafe/failsafe_ether.c
@@ -33,8 +33,46 @@
 
 #include <unistd.h>
 
+#include <rte_flow.h>
+#include <rte_flow_driver.h>
+
 #include "failsafe_private.h"
 
+/** Print a message out of a flow error. */
+static int
+fs_flow_complain(struct rte_flow_error *error)
+{
+	static const char *const errstrlist[] = {
+		[RTE_FLOW_ERROR_TYPE_NONE] = "no error",
+		[RTE_FLOW_ERROR_TYPE_UNSPECIFIED] = "cause unspecified",
+		[RTE_FLOW_ERROR_TYPE_HANDLE] = "flow rule (handle)",
+		[RTE_FLOW_ERROR_TYPE_ATTR_GROUP] = "group field",
+		[RTE_FLOW_ERROR_TYPE_ATTR_PRIORITY] = "priority field",
+		[RTE_FLOW_ERROR_TYPE_ATTR_INGRESS] = "ingress field",
+		[RTE_FLOW_ERROR_TYPE_ATTR_EGRESS] = "egress field",
+		[RTE_FLOW_ERROR_TYPE_ATTR] = "attributes structure",
+		[RTE_FLOW_ERROR_TYPE_ITEM_NUM] = "pattern length",
+		[RTE_FLOW_ERROR_TYPE_ITEM] = "specific pattern item",
+		[RTE_FLOW_ERROR_TYPE_ACTION_NUM] = "number of actions",
+		[RTE_FLOW_ERROR_TYPE_ACTION] = "specific action",
+	};
+	const char *errstr;
+	char buf[32];
+	int err = rte_errno;
+
+	if ((unsigned int)error->type >= RTE_DIM(errstrlist) ||
+			!errstrlist[error->type])
+		errstr = "unknown type";
+	else
+		errstr = errstrlist[error->type];
+	ERROR("Caught error type %d (%s): %s%s\n",
+		error->type, errstr,
+		error->cause ? (snprintf(buf, sizeof(buf), "cause: %p, ",
+				error->cause), buf) : "",
+		error->message ? error->message : "(no stated reason)");
+	return -err;
+}
+
 static int
 fs_eth_dev_conf_apply(struct rte_eth_dev *dev,
 		struct sub_device *sdev)
@@ -42,6 +80,8 @@ fs_eth_dev_conf_apply(struct rte_eth_dev *dev,
 	struct rte_eth_dev *edev;
 	struct rte_vlan_filter_conf *vfc1;
 	struct rte_vlan_filter_conf *vfc2;
+	struct rte_flow *flow;
+	struct rte_flow_error ferror;
 	uint32_t i;
 	int ret;
 
@@ -177,6 +217,36 @@ fs_eth_dev_conf_apply(struct rte_eth_dev *dev,
 	} else {
 		DEBUG("VLAN filter already set");
 	}
+	/* rte_flow */
+	if (TAILQ_EMPTY(&PRIV(dev)->flow_list)) {
+		DEBUG("rte_flow already set");
+	} else {
+		DEBUG("Resetting rte_flow configuration");
+		ret = rte_flow_flush(PORT_ID(sdev), &ferror);
+		if (ret) {
+			fs_flow_complain(&ferror);
+			return ret;
+		}
+		i = 0;
+		rte_errno = 0;
+		DEBUG("Configuring rte_flow");
+		TAILQ_FOREACH(flow, &PRIV(dev)->flow_list, next) {
+			DEBUG("Creating flow #%" PRIu32, i++);
+			flow->flows[SUB_ID(sdev)] =
+				rte_flow_create(PORT_ID(sdev),
+						&flow->fd->attr,
+						flow->fd->items,
+						flow->fd->actions,
+						&ferror);
+			ret = rte_errno;
+			if (ret)
+				break;
+		}
+		if (ret) {
+			fs_flow_complain(&ferror);
+			return ret;
+		}
+	}
 	return 0;
 }
 
diff --git a/drivers/net/failsafe/failsafe_flow.c b/drivers/net/failsafe/failsafe_flow.c
new file mode 100644
index 0000000..0098672
--- /dev/null
+++ b/drivers/net/failsafe/failsafe_flow.c
@@ -0,0 +1,215 @@
+/*-
+ *   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 <sys/queue.h>
+
+#include <rte_malloc.h>
+#include <rte_tailq.h>
+#include <rte_flow.h>
+#include <rte_flow_driver.h>
+
+#include "failsafe_private.h"
+
+static struct rte_flow *
+fs_flow_allocate(const struct rte_flow_attr *attr,
+		 const struct rte_flow_item *items,
+		 const struct rte_flow_action *actions)
+{
+	struct rte_flow *flow;
+	size_t fdsz;
+
+	fdsz = rte_flow_copy(NULL, 0, attr, items, actions);
+	flow = rte_zmalloc(NULL,
+			   sizeof(struct rte_flow) + fdsz,
+			   RTE_CACHE_LINE_SIZE);
+	if (flow == NULL) {
+		ERROR("Could not allocate new flow");
+		return NULL;
+	}
+	flow->fd = (void *)((uintptr_t)flow + sizeof(*flow));
+	if (rte_flow_copy(flow->fd, fdsz, attr, items, actions) != fdsz) {
+		ERROR("Failed to copy flow description");
+		rte_free(flow);
+		return NULL;
+	}
+	return flow;
+}
+
+static void
+fs_flow_release(struct rte_flow **flow)
+{
+	rte_free(*flow);
+	*flow = NULL;
+}
+
+static int
+fs_flow_validate(struct rte_eth_dev *dev,
+		 const struct rte_flow_attr *attr,
+		 const struct rte_flow_item patterns[],
+		 const struct rte_flow_action actions[],
+		 struct rte_flow_error *error)
+{
+	struct sub_device *sdev;
+	uint8_t i;
+	int ret;
+
+	FOREACH_SUBDEV_STATE(sdev, i, dev, DEV_ACTIVE) {
+		DEBUG("Calling rte_flow_validate on sub_device %d", i);
+		ret = rte_flow_validate(PORT_ID(sdev),
+				attr, patterns, actions, error);
+		if (ret) {
+			ERROR("Operation rte_flow_validate failed for sub_device %d"
+			      " with error %d", i, ret);
+			return ret;
+		}
+	}
+	return 0;
+}
+
+static struct rte_flow *
+fs_flow_create(struct rte_eth_dev *dev,
+	       const struct rte_flow_attr *attr,
+	       const struct rte_flow_item patterns[],
+	       const struct rte_flow_action actions[],
+	       struct rte_flow_error *error)
+{
+	struct sub_device *sdev;
+	struct rte_flow *flow;
+	uint8_t i;
+
+	flow = fs_flow_allocate(attr, patterns, actions);
+	FOREACH_SUBDEV_STATE(sdev, i, dev, DEV_ACTIVE) {
+		flow->flows[i] = rte_flow_create(PORT_ID(sdev),
+				attr, patterns, actions, error);
+		if (flow->flows[i] == NULL) {
+			ERROR("Failed to create flow on sub_device %d",
+				i);
+			goto err;
+		}
+	}
+	TAILQ_INSERT_TAIL(&PRIV(dev)->flow_list, flow, next);
+	return flow;
+err:
+	FOREACH_SUBDEV(sdev, i, dev) {
+		if (flow->flows[i] != NULL)
+			rte_flow_destroy(PORT_ID(sdev),
+				flow->flows[i], error);
+	}
+	fs_flow_release(&flow);
+	return NULL;
+}
+
+static int
+fs_flow_destroy(struct rte_eth_dev *dev,
+		struct rte_flow *flow,
+		struct rte_flow_error *error)
+{
+	struct sub_device *sdev;
+	uint8_t i;
+	int ret;
+
+	if (flow == NULL) {
+		ERROR("Invalid flow");
+		return -EINVAL;
+	}
+	ret = 0;
+	FOREACH_SUBDEV_STATE(sdev, i, dev, DEV_ACTIVE) {
+		int local_ret;
+
+		if (flow->flows[i] == NULL)
+			continue;
+		local_ret = rte_flow_destroy(PORT_ID(sdev),
+				flow->flows[i], error);
+		if (local_ret) {
+			ERROR("Failed to destroy flow on sub_device %d: %d",
+					i, local_ret);
+			if (ret == 0)
+				ret = local_ret;
+		}
+	}
+	TAILQ_REMOVE(&PRIV(dev)->flow_list, flow, next);
+	fs_flow_release(&flow);
+	return ret;
+}
+
+static int
+fs_flow_flush(struct rte_eth_dev *dev,
+	      struct rte_flow_error *error)
+{
+	struct sub_device *sdev;
+	struct rte_flow *flow;
+	void *tmp;
+	uint8_t i;
+	int ret;
+
+	FOREACH_SUBDEV_STATE(sdev, i, dev, DEV_ACTIVE) {
+		DEBUG("Calling rte_flow_flush on sub_device %d", i);
+		ret = rte_flow_flush(PORT_ID(sdev), error);
+		if (ret) {
+			ERROR("Operation rte_flow_flush failed for sub_device %d"
+			      " with error %d", i, ret);
+			return ret;
+		}
+	}
+	TAILQ_FOREACH_SAFE(flow, &PRIV(dev)->flow_list, next, tmp) {
+		TAILQ_REMOVE(&PRIV(dev)->flow_list, flow, next);
+		fs_flow_release(&flow);
+	}
+	return 0;
+}
+
+static int
+fs_flow_query(struct rte_eth_dev *dev,
+	      struct rte_flow *flow,
+	      enum rte_flow_action_type type,
+	      void *arg,
+	      struct rte_flow_error *error)
+{
+	struct sub_device *sdev;
+
+	sdev = TX_SUBDEV(dev);
+	if (sdev != NULL) {
+		return rte_flow_query(PORT_ID(sdev),
+				flow->flows[SUB_ID(sdev)], type, arg, error);
+	}
+	WARN("No active sub_device to query about its flow");
+	return -1;
+}
+
+const struct rte_flow_ops fs_flow_ops = {
+	.validate = fs_flow_validate,
+	.create = fs_flow_create,
+	.destroy = fs_flow_destroy,
+	.flush = fs_flow_flush,
+	.query = fs_flow_query,
+};
diff --git a/drivers/net/failsafe/failsafe_ops.c b/drivers/net/failsafe/failsafe_ops.c
index fdef019..223f26a 100644
--- a/drivers/net/failsafe/failsafe_ops.c
+++ b/drivers/net/failsafe/failsafe_ops.c
@@ -36,6 +36,7 @@
 #include <rte_debug.h>
 #include <rte_ethdev.h>
 #include <rte_malloc.h>
+#include <rte_flow.h>
 
 #include "failsafe_private.h"
 
@@ -627,6 +628,33 @@ fs_mac_addr_set(struct rte_eth_dev *dev, struct ether_addr *mac_addr)
 		rte_eth_dev_default_mac_addr_set(PORT_ID(sdev), mac_addr);
 }
 
+static int
+fs_filter_ctrl(struct rte_eth_dev *dev,
+		enum rte_filter_type type,
+		enum rte_filter_op op,
+		void *arg)
+{
+	struct sub_device *sdev;
+	uint8_t i;
+	int ret;
+
+	if (type == RTE_ETH_FILTER_GENERIC &&
+	    op == RTE_ETH_FILTER_GET) {
+		*(const void **)arg = &fs_flow_ops;
+		return 0;
+	}
+	FOREACH_SUBDEV_STATE(sdev, i, dev, DEV_ACTIVE) {
+		DEBUG("Calling rte_eth_dev_filter_ctrl on sub_device %d", i);
+		ret = rte_eth_dev_filter_ctrl(PORT_ID(sdev), type, op, arg);
+		if (ret) {
+			ERROR("Operation rte_eth_dev_filter_ctrl failed for sub_device %d"
+			      " with error %d", i, ret);
+			return ret;
+		}
+	}
+	return 0;
+}
+
 const struct eth_dev_ops failsafe_ops = {
 	.dev_configure = fs_dev_configure,
 	.dev_start = fs_dev_start,
@@ -654,4 +682,5 @@ const struct eth_dev_ops failsafe_ops = {
 	.mac_addr_remove = fs_mac_addr_remove,
 	.mac_addr_add = fs_mac_addr_add,
 	.mac_addr_set = fs_mac_addr_set,
+	.filter_ctrl = fs_filter_ctrl,
 };
diff --git a/drivers/net/failsafe/failsafe_private.h b/drivers/net/failsafe/failsafe_private.h
index 2342646..82d969d 100644
--- a/drivers/net/failsafe/failsafe_private.h
+++ b/drivers/net/failsafe/failsafe_private.h
@@ -34,6 +34,8 @@
 #ifndef _RTE_ETH_FAILSAFE_PRIVATE_H_
 #define _RTE_ETH_FAILSAFE_PRIVATE_H_
 
+#include <sys/queue.h>
+
 #include <rte_dev.h>
 #include <rte_ethdev.h>
 #include <rte_devargs.h>
@@ -72,6 +74,14 @@ struct txq {
 	struct rte_eth_txq_info info;
 };
 
+struct rte_flow {
+	TAILQ_ENTRY(rte_flow) next;
+	/* sub_flows */
+	struct rte_flow *flows[FAILSAFE_MAX_ETHPORTS];
+	/* flow description for synchronization */
+	struct rte_flow_desc *fd;
+};
+
 enum dev_state {
 	DEV_UNDEFINED,
 	DEV_PARSED,
@@ -86,6 +96,7 @@ struct sub_device {
 	struct rte_bus *bus;
 	struct rte_device *dev;
 	struct rte_eth_dev *edev;
+	uint8_t sid;
 	/* Device state machine */
 	enum dev_state state;
 	/* Some device are defined as a command line */
@@ -104,6 +115,8 @@ struct fs_priv {
 	uint8_t subs_tail; /* first invalid */
 	uint8_t subs_tx; /* current emitting device */
 	uint8_t current_probed;
+	/* flow mapping */
+	TAILQ_HEAD(sub_flows, rte_flow) flow_list;
 	/* current number of mac_addr slots allocated. */
 	uint32_t nb_mac_addr;
 	struct ether_addr mac_addrs[FAILSAFE_MAX_ETHADDR];
@@ -153,6 +166,7 @@ int failsafe_eth_dev_state_sync(struct rte_eth_dev *dev);
 
 extern const char pmd_failsafe_driver_name[];
 extern const struct eth_dev_ops failsafe_ops;
+extern const struct rte_flow_ops fs_flow_ops;
 extern uint64_t hotplug_poll;
 extern int mac_from_arg;
 
@@ -170,6 +184,10 @@ extern int mac_from_arg;
 #define PORT_ID(sdev) \
 	(ETH(sdev)->data->port_id)
 
+/* sdev: (struct sub_device *) */
+#define SUB_ID(sdev) \
+	((sdev)->sid)
+
 /**
  * Stateful iterator construct over fail-safe sub-devices:
  * s:     (struct sub_device *), iterator
-- 
2.1.4