[dpdk-dev] [PATCH 17/37] ip_pipeline: add kni object

[Jasvinder Singh <jasvinder.singh@intel.com>]

Add kni object implementation to the application.

Signed-off-by: Cristian Dumitrescu <cristian.dumitrescu@intel.com>
Signed-off-by: Jasvinder Singh <jasvinder.singh@intel.com>
Signed-off-by: Kevin Laatz <kevin.laatz@intel.com>
---
 examples/ip_pipeline/Makefile    |   1 +
 examples/ip_pipeline/cli.c       |  65 +++++++++++++++
 examples/ip_pipeline/kni.c       | 165 +++++++++++++++++++++++++++++++++++++++
 examples/ip_pipeline/kni.h       |  44 +++++++++++
 examples/ip_pipeline/main.c      |  10 +++
 examples/ip_pipeline/meson.build |   1 +
 6 files changed, 286 insertions(+)
 create mode 100644 examples/ip_pipeline/kni.c
 create mode 100644 examples/ip_pipeline/kni.h

diff --git a/examples/ip_pipeline/Makefile b/examples/ip_pipeline/Makefile
index 0f6bb78..dc56ebf 100644
--- a/examples/ip_pipeline/Makefile
+++ b/examples/ip_pipeline/Makefile
@@ -7,6 +7,7 @@ APP = ip_pipeline
 # all source are stored in SRCS-y
 SRCS-y := cli.c
 SRCS-y += conn.c
+SRCS-y += kni.c
 SRCS-y += link.c
 SRCS-y += main.c
 SRCS-y += mempool.c
diff --git a/examples/ip_pipeline/cli.c b/examples/ip_pipeline/cli.c
index 5dbd576..a5308bc 100644
--- a/examples/ip_pipeline/cli.c
+++ b/examples/ip_pipeline/cli.c
@@ -10,6 +10,7 @@
 #include <rte_common.h>
 
 #include "cli.h"
+#include "kni.h"
 #include "link.h"
 #include "mempool.h"
 #include "parser.h"
@@ -630,6 +631,65 @@ cmd_tap(char **tokens,
 	}
 }
 
+/**
+ * kni <kni_name>
+ * 	link <link_name>
+ *	mempool <mempool_name>
+ * 	[thread <thread_id>]
+ */
+static void
+cmd_kni(char **tokens,
+	uint32_t n_tokens,
+	char *out,
+	size_t out_size)
+{
+	struct kni_params p;
+	char *name;
+	struct kni *kni;
+
+	if ((n_tokens != 6) && (n_tokens != 8)) {
+		snprintf(out, out_size, MSG_ARG_MISMATCH, tokens[0]);
+		return;
+	}
+
+	name = tokens[1];
+
+	if (strcmp(tokens[2], "link") != 0) {
+		snprintf(out, out_size, MSG_ARG_NOT_FOUND, "link");
+		return;
+	}
+
+	p.link_name = tokens[3];
+
+	if (strcmp(tokens[4], "mempool") != 0) {
+		snprintf(out, out_size, MSG_ARG_NOT_FOUND, "mempool");
+		return;
+	}
+
+	p.mempool_name = tokens[5];
+
+	if (n_tokens == 8) {
+		if (strcmp(tokens[6], "thread") != 0) {
+			snprintf(out, out_size, MSG_ARG_NOT_FOUND, "thread");
+			return;
+		}
+
+		if (parser_read_uint32(&p.thread_id, tokens[7]) != 0) {
+			snprintf(out, out_size, MSG_ARG_INVALID, "thread_id");
+			return;
+		}
+
+		p.force_bind = 1;
+	} else
+		p.force_bind = 0;
+
+	kni = kni_create(name, &p);
+	if (kni == NULL) {
+		snprintf(out, out_size, MSG_CMD_FAIL, tokens[0]);
+		return;
+	}
+}
+
 void
 cli_process(char *in, char *out, size_t out_size)
 {
@@ -703,6 +763,11 @@ cli_process(char *in, char *out, size_t out_size)
 		return;
 	}
 
+	if (strcmp(tokens[0], "kni") == 0) {
+		cmd_kni(tokens, n_tokens, out, out_size);
+		return;
+	}
+
 	snprintf(out, out_size, MSG_CMD_UNKNOWN, tokens[0]);
 }
 
diff --git a/examples/ip_pipeline/kni.c b/examples/ip_pipeline/kni.c
new file mode 100644
index 0000000..8a14aca
--- /dev/null
+++ b/examples/ip_pipeline/kni.c
@@ -0,0 +1,165 @@
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright(c) 2010-2018 Intel Corporation
+ */
+
+#include <stdlib.h>
+#include <string.h>
+
+#include <rte_ethdev.h>
+#include <rte_bus_pci.h>
+
+#include "kni.h"
+#include "mempool.h"
+#include "link.h"
+
+static struct kni_list kni_list;
+
+#ifndef KNI_MAX
+#define KNI_MAX                                            16
+#endif
+
+int
+kni_init(void)
+{
+	TAILQ_INIT(&kni_list);
+
+#ifdef RTE_LIBRTE_KNI
+	rte_kni_init(KNI_MAX);
+#endif
+
+	return 0;
+}
+
+struct kni *
+kni_find(const char *name)
+{
+	struct kni *kni;
+
+	if (name == NULL)
+		return NULL;
+
+	TAILQ_FOREACH(kni, &kni_list, node)
+		if (strcmp(kni->name, name) == 0)
+			return kni;
+
+	return NULL;
+}
+
+#ifndef RTE_LIBRTE_KNI
+
+struct kni *
+kni_create(const char *name __rte_unused,
+	struct kni_params *params __rte_unused)
+{
+	return NULL;
+}
+
+void
+kni_handle_request(void)
+{
+	return 0;
+}
+
+#else
+
+static int
+kni_config_network_interface(uint16_t port_id, uint8_t if_up) {
+	int ret = 0;
+
+	if (port_id >= rte_eth_dev_count())
+		return -EINVAL;
+
+	ret = (if_up) ?
+		rte_eth_dev_set_link_up(port_id) :
+		rte_eth_dev_set_link_down(port_id);
+
+	return ret;
+}
+
+static int
+kni_change_mtu(uint16_t port_id, unsigned int new_mtu) {
+	int ret;
+
+	if (port_id >= rte_eth_dev_count())
+		return -EINVAL;
+
+	if (new_mtu > ETHER_MAX_LEN)
+		return -EINVAL;
+
+	/* Set new MTU */
+	ret = rte_eth_dev_set_mtu(port_id, new_mtu);
+	if (ret < 0)
+		return ret;
+
+	return 0;
+}
+
+struct kni *
+kni_create(const char *name, struct kni_params *params)
+{
+	struct rte_eth_dev_info dev_info;
+	struct rte_kni_conf kni_conf;
+	struct rte_kni_ops kni_ops;
+	struct kni *kni;
+	struct mempool *mempool;
+	struct link *link;
+	struct rte_kni *k;
+
+	/* Check input params */
+	if ((name == NULL) ||
+		kni_find(name) ||
+		(params == NULL))
+		return NULL;
+
+	mempool = mempool_find(params->mempool_name);
+	link = link_find(params->link_name);
+	if ((mempool == NULL) ||
+		(link == NULL))
+		return NULL;
+
+	/* Resource create */
+	rte_eth_dev_info_get(link->port_id, &dev_info);
+
+	memset(&kni_conf, 0, sizeof(kni_conf));
+	snprintf(kni_conf.name, RTE_KNI_NAMESIZE, "%s", name);
+	kni_conf.force_bind = params->force_bind;
+	kni_conf.core_id = params->thread_id;
+	kni_conf.group_id = link->port_id;
+	kni_conf.mbuf_size = mempool->buffer_size;
+	kni_conf.addr = dev_info.pci_dev->addr;
+	kni_conf.id = dev_info.pci_dev->id;
+
+	memset(&kni_ops, 0, sizeof(kni_ops));
+	kni_ops.port_id = link->port_id;
+	kni_ops.config_network_if = kni_config_network_interface;
+	kni_ops.change_mtu = kni_change_mtu;
+
+	k = rte_kni_alloc(mempool->m, &kni_conf, &kni_ops);
+	if (k == NULL)
+		return NULL;
+
+	/* Node allocation */
+	kni = calloc(1, sizeof(struct kni));
+	if (kni == NULL)
+		return NULL;
+
+	/* Node fill in */
+	strncpy(kni->name, name, sizeof(kni->name));
+	kni->k = k;
+
+	/* Node add to list */
+	TAILQ_INSERT_TAIL(&kni_list, kni, node);
+
+	return kni;
+}
+
+void
+kni_handle_request(void)
+{
+	struct kni *kni;
+
+	TAILQ_FOREACH(kni, &kni_list, node)
+		rte_kni_handle_request(kni->k);
+}
+
+#endif
diff --git a/examples/ip_pipeline/kni.h b/examples/ip_pipeline/kni.h
new file mode 100644
index 0000000..e53de12
--- /dev/null
+++ b/examples/ip_pipeline/kni.h
@@ -0,0 +1,44 @@
+/* SPDX-License-Identifier: BSD-3-Clause
+ * Copyright(c) 2010-2018 Intel Corporation
+ */
+
+#ifndef _INCLUDE_KNI_H_
+#define _INCLUDE_KNI_H_
+
+#include <stdint.h>
+#include <sys/queue.h>
+
+#ifdef RTE_LIBRTE_KNI
+#include <rte_kni.h>
+#endif
+
+#include "common.h"
+
+struct kni {
+	TAILQ_ENTRY(kni) node;
+	char name[NAME_SIZE];
+	struct rte_kni *k;
+};
+
+TAILQ_HEAD(kni_list, kni);
+
+int
+kni_init(void);
+
+struct kni *
+kni_find(const char *name);
+
+struct kni_params {
+	const char *link_name;
+	const char *mempool_name;
+	int force_bind;
+	uint32_t thread_id;
+};
+
+struct kni *
+kni_create(const char *name, struct kni_params *params);
+
+void
+kni_handle_request(void);
+
+#endif /* _INCLUDE_KNI_H_ */
diff --git a/examples/ip_pipeline/main.c b/examples/ip_pipeline/main.c
index 33c3354..b65762e 100644
--- a/examples/ip_pipeline/main.c
+++ b/examples/ip_pipeline/main.c
@@ -12,6 +12,7 @@
 
 #include "cli.h"
 #include "conn.h"
+#include "kni.h"
 #include "link.h"
 #include "mempool.h"
 #include "swq.h"
@@ -199,6 +200,13 @@ main(int argc, char **argv)
 		return status;
 	}
 
+	/* KNI */
+	status = kni_init();
+	if (status) {
+		printf("Error: KNI initialization failed (%d)\n", status);
+		return status;
+	}
+
 	/* Script */
 	if (app.script_name)
 		cli_script_process(app.script_name,
@@ -210,5 +218,7 @@ main(int argc, char **argv)
 		conn_poll_for_conn(conn);
 
 		conn_poll_for_msg(conn);
+
+		kni_handle_request();
 	}
 }
diff --git a/examples/ip_pipeline/meson.build b/examples/ip_pipeline/meson.build
index e875811..5ad79b2 100644
--- a/examples/ip_pipeline/meson.build
+++ b/examples/ip_pipeline/meson.build
@@ -10,6 +10,7 @@ deps += ['pipeline', 'bus_pci']
 sources = files(
 	'cli.c',
 	'conn.c',
+	'kni.c',
 	'link.c',
 	'main.c',
 	'mempool.c',
-- 
2.9.3