[PATCH v4 2/5] net/iavf: add flow subscription to AVF

[Jie Wang <jie1x.wang@intel.com>]

Add the skeletal code of flow subscription to AVF driver.

Signed-off-by: Jie Wang <jie1x.wang@intel.com>
---
 doc/guides/rel_notes/release_22_11.rst |   4 +
 drivers/net/iavf/iavf_fsub.c           | 112 +++++++++++++++++++++++++
 drivers/net/iavf/iavf_generic_flow.c   |  17 +++-
 drivers/net/iavf/iavf_generic_flow.h   |   1 +
 drivers/net/iavf/iavf_vchnl.c          |   1 +
 drivers/net/iavf/meson.build           |   1 +
 6 files changed, 135 insertions(+), 1 deletion(-)
 create mode 100644 drivers/net/iavf/iavf_fsub.c

diff --git a/doc/guides/rel_notes/release_22_11.rst b/doc/guides/rel_notes/release_22_11.rst
index 8c021cf050..bb77a03e24 100644
--- a/doc/guides/rel_notes/release_22_11.rst
+++ b/doc/guides/rel_notes/release_22_11.rst
@@ -55,6 +55,10 @@ New Features
      Also, make sure to start the actual text at the margin.
      =======================================================
 
+* **Updated Intel iavf driver.**
+
+  * Added flow subscription support.
+
 
 Removed Items
 -------------
diff --git a/drivers/net/iavf/iavf_fsub.c b/drivers/net/iavf/iavf_fsub.c
new file mode 100644
index 0000000000..17f9bb2976
--- /dev/null
+++ b/drivers/net/iavf/iavf_fsub.c
@@ -0,0 +1,112 @@
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright(c) 2022 Intel Corporation
+ */
+
+#include <sys/queue.h>
+#include <stdio.h>
+#include <errno.h>
+#include <stdint.h>
+#include <string.h>
+#include <unistd.h>
+#include <stdarg.h>
+#include <rte_debug.h>
+#include <rte_ether.h>
+#include <rte_ethdev.h>
+#include <rte_log.h>
+#include <rte_malloc.h>
+#include <rte_eth_ctrl.h>
+#include <rte_tailq.h>
+#include <rte_flow_driver.h>
+#include <rte_flow.h>
+#include <iavf.h>
+#include "iavf_generic_flow.h"
+
+
+static struct iavf_flow_parser iavf_fsub_parser;
+
+static struct iavf_pattern_match_item iavf_fsub_pattern_list[] = {};
+
+static int
+iavf_fsub_create(__rte_unused struct iavf_adapter *ad,
+		 __rte_unused struct rte_flow *flow,
+		 __rte_unused void *meta,
+		 __rte_unused struct rte_flow_error *error)
+{
+	return -rte_errno;
+}
+
+static int
+iavf_fsub_destroy(__rte_unused struct iavf_adapter *ad,
+		  __rte_unused struct rte_flow *flow,
+		  __rte_unused struct rte_flow_error *error)
+{
+	return -rte_errno;
+}
+
+static int
+iavf_fsub_validation(__rte_unused struct iavf_adapter *ad,
+		     __rte_unused struct rte_flow *flow,
+		     __rte_unused void *meta,
+		     __rte_unused struct rte_flow_error *error)
+{
+	return -rte_errno;
+};
+
+static int
+iavf_fsub_parse(__rte_unused struct iavf_adapter *ad,
+		__rte_unused struct iavf_pattern_match_item *array,
+		__rte_unused uint32_t array_len,
+		__rte_unused const struct rte_flow_item pattern[],
+		__rte_unused const struct rte_flow_action actions[],
+		__rte_unused void **meta,
+		__rte_unused struct rte_flow_error *error)
+{
+	return -rte_errno;
+}
+
+static int
+iavf_fsub_init(struct iavf_adapter *ad)
+{
+	struct iavf_info *vf = IAVF_DEV_PRIVATE_TO_VF(ad);
+	struct iavf_flow_parser *parser;
+
+	if (!vf->vf_res)
+		return -EINVAL;
+
+	if (vf->vf_res->vf_cap_flags & VIRTCHNL_VF_OFFLOAD_FSUB_PF)
+		parser = &iavf_fsub_parser;
+	else
+		return -ENOTSUP;
+
+	return iavf_register_parser(parser, ad);
+}
+
+static void
+iavf_fsub_uninit(struct iavf_adapter *ad)
+{
+	iavf_unregister_parser(&iavf_fsub_parser, ad);
+}
+
+static struct
+iavf_flow_engine iavf_fsub_engine = {
+	.init = iavf_fsub_init,
+	.uninit = iavf_fsub_uninit,
+	.create = iavf_fsub_create,
+	.destroy = iavf_fsub_destroy,
+	.validation = iavf_fsub_validation,
+	.type = IAVF_FLOW_ENGINE_FSUB,
+};
+
+static struct
+iavf_flow_parser iavf_fsub_parser = {
+	.engine = &iavf_fsub_engine,
+	.array = iavf_fsub_pattern_list,
+	.array_len = RTE_DIM(iavf_fsub_pattern_list),
+	.parse_pattern_action = iavf_fsub_parse,
+	.stage = IAVF_FLOW_STAGE_DISTRIBUTOR,
+};
+
+RTE_INIT(iavf_fsub_engine_init)
+{
+	iavf_register_flow_engine(&iavf_fsub_engine);
+}
diff --git a/drivers/net/iavf/iavf_generic_flow.c b/drivers/net/iavf/iavf_generic_flow.c
index e1a611e319..b04614ba6e 100644
--- a/drivers/net/iavf/iavf_generic_flow.c
+++ b/drivers/net/iavf/iavf_generic_flow.c
@@ -1866,6 +1866,8 @@ iavf_register_parser(struct iavf_flow_parser *parser,
 {
 	struct iavf_parser_list *list = NULL;
 	struct iavf_flow_parser_node *parser_node;
+	struct iavf_flow_parser_node *existing_node;
+	void *temp;
 	struct iavf_info *vf = IAVF_DEV_PRIVATE_TO_VF(ad);
 
 	parser_node = rte_zmalloc("iavf_parser", sizeof(*parser_node), 0);
@@ -1880,14 +1882,26 @@ iavf_register_parser(struct iavf_flow_parser *parser,
 		TAILQ_INSERT_TAIL(list, parser_node, node);
 	} else if (parser->engine->type == IAVF_FLOW_ENGINE_FDIR) {
 		list = &vf->dist_parser_list;
+		RTE_TAILQ_FOREACH_SAFE(existing_node, list, node, temp) {
+			if (existing_node->parser->engine->type ==
+			    IAVF_FLOW_ENGINE_FSUB) {
+				TAILQ_INSERT_AFTER(list, existing_node,
+						   parser_node, node);
+				goto DONE;
+			}
+		}
 		TAILQ_INSERT_HEAD(list, parser_node, node);
 	} else if (parser->engine->type == IAVF_FLOW_ENGINE_IPSEC_CRYPTO) {
 		list = &vf->ipsec_crypto_parser_list;
 		TAILQ_INSERT_HEAD(list, parser_node, node);
+	} else if (parser->engine->type == IAVF_FLOW_ENGINE_FSUB) {
+		list = &vf->dist_parser_list;
+		TAILQ_INSERT_HEAD(list, parser_node, node);
 	} else {
 		return -EINVAL;
 	}
 
+DONE:
 	return 0;
 }
 
@@ -1902,7 +1916,8 @@ iavf_unregister_parser(struct iavf_flow_parser *parser,
 
 	if (parser->engine->type == IAVF_FLOW_ENGINE_HASH)
 		list = &vf->rss_parser_list;
-	else if (parser->engine->type == IAVF_FLOW_ENGINE_FDIR)
+	else if ((parser->engine->type == IAVF_FLOW_ENGINE_FDIR) ||
+		 (parser->engine->type == IAVF_FLOW_ENGINE_FSUB))
 		list = &vf->dist_parser_list;
 
 	if (list == NULL)
diff --git a/drivers/net/iavf/iavf_generic_flow.h b/drivers/net/iavf/iavf_generic_flow.h
index 52eb1caf29..448facffa5 100644
--- a/drivers/net/iavf/iavf_generic_flow.h
+++ b/drivers/net/iavf/iavf_generic_flow.h
@@ -480,6 +480,7 @@ enum iavf_flow_engine_type {
 	IAVF_FLOW_ENGINE_IPSEC_CRYPTO,
 	IAVF_FLOW_ENGINE_FDIR,
 	IAVF_FLOW_ENGINE_HASH,
+	IAVF_FLOW_ENGINE_FSUB,
 	IAVF_FLOW_ENGINE_MAX,
 };
 
diff --git a/drivers/net/iavf/iavf_vchnl.c b/drivers/net/iavf/iavf_vchnl.c
index 21bd1e2193..6d84add423 100644
--- a/drivers/net/iavf/iavf_vchnl.c
+++ b/drivers/net/iavf/iavf_vchnl.c
@@ -502,6 +502,7 @@ iavf_get_vf_resource(struct iavf_adapter *adapter)
 		VIRTCHNL_VF_OFFLOAD_RX_FLEX_DESC |
 		VIRTCHNL_VF_OFFLOAD_FDIR_PF |
 		VIRTCHNL_VF_OFFLOAD_ADV_RSS_PF |
+		VIRTCHNL_VF_OFFLOAD_FSUB_PF |
 		VIRTCHNL_VF_OFFLOAD_REQ_QUEUES |
 		VIRTCHNL_VF_OFFLOAD_CRC |
 		VIRTCHNL_VF_OFFLOAD_VLAN_V2 |
diff --git a/drivers/net/iavf/meson.build b/drivers/net/iavf/meson.build
index 2da37de662..6df771f917 100644
--- a/drivers/net/iavf/meson.build
+++ b/drivers/net/iavf/meson.build
@@ -16,6 +16,7 @@ sources = files(
         'iavf_hash.c',
         'iavf_tm.c',
         'iavf_ipsec_crypto.c',
+        'iavf_fsub.c',
 )
 
 if arch_subdir == 'x86'
-- 
2.25.1