[dpdk-dev] [PATCH 11/29] Packet Framework librte_port: Source/Sink ports

[Cristian Dumitrescu <cristian.dumitrescu@intel.com>]

Source port is a packet generator, similar to /dev/zero Linux device.

Sink port is a packet terminator (drops all input packets), similar to /dev/null Linux device.

Signed-off-by: Cristian Dumitrescu <cristian.dumitrescu@intel.com>
---
 lib/librte_port/rte_port_source_sink.c |  159 ++++++++++++++++++++++++++++++++
 lib/librte_port/rte_port_source_sink.h |   70 ++++++++++++++
 2 files changed, 229 insertions(+), 0 deletions(-)
 create mode 100644 lib/librte_port/rte_port_source_sink.c
 create mode 100644 lib/librte_port/rte_port_source_sink.h

diff --git a/lib/librte_port/rte_port_source_sink.c b/lib/librte_port/rte_port_source_sink.c
new file mode 100644
index 0000000..95034fd
--- /dev/null
+++ b/lib/librte_port/rte_port_source_sink.c
@@ -0,0 +1,159 @@
+/*-
+ *   BSD LICENSE
+ * 
+ *   Copyright(c) 2010-2014 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 <stdint.h>
+#include <string.h>
+
+#include <rte_mbuf.h>
+#include <rte_mempool.h>
+#include <rte_malloc.h>
+
+#include "rte_port_source_sink.h"
+
+/*
+ * Port SOURCE
+ */
+struct rte_port_source {
+	struct rte_mempool *mempool;
+};
+
+static void *
+rte_port_source_create(void *params, int socket_id)
+{
+	struct rte_port_source_params *p =
+			(struct rte_port_source_params *) params;
+ 	struct rte_port_source *port;
+
+	/* Check input arguments*/
+	if ((p == NULL) || (p->mempool == NULL)) {
+		RTE_LOG(ERR, PORT, "%s: Invalid params\n", __func__);
+		return NULL;
+	}
+
+	/* Memory allocation */
+	port = rte_zmalloc_socket("PORT", sizeof(*port),
+			CACHE_LINE_SIZE, socket_id);
+	if (port == NULL) {
+		RTE_LOG(ERR, PORT, "%s: Failed to allocate port\n", __func__);
+		return NULL;
+	}
+
+	/* Initialization */
+	port->mempool = (struct rte_mempool *) p->mempool;
+
+	return port;
+}
+
+static int
+rte_port_source_free(void *port)
+{
+	/* Check input parameters */
+	if (port == NULL) {
+		return 0;
+	}
+
+	rte_free(port);
+
+	return 0;
+}
+
+static int
+rte_port_source_rx(void *port, struct rte_mbuf **pkts, uint32_t n_pkts)
+{
+	struct rte_port_source *p = (struct rte_port_source *) port;
+
+	if (rte_mempool_get_bulk(p->mempool, (void **) pkts, n_pkts) != 0) {
+		return 0;
+	}
+
+	return n_pkts;
+}
+
+/*
+ * Port SINK
+ */
+static void *
+rte_port_sink_create(__rte_unused void *params, __rte_unused int socket_id)
+{
+	return (void *) 1;
+}
+
+static int
+rte_port_sink_tx(__rte_unused void *port, struct rte_mbuf *pkt)
+{
+	rte_pktmbuf_free(pkt);
+
+	return 0;
+}
+
+static int
+rte_port_sink_tx_bulk(__rte_unused void *port, struct rte_mbuf **pkts, uint64_t pkts_mask)
+{
+	if ((pkts_mask & (pkts_mask + 1)) == 0) {
+		uint64_t n_pkts = __builtin_popcountll(pkts_mask);
+		uint32_t i;
+
+		for (i = 0; i < n_pkts; i ++) {
+			struct rte_mbuf *pkt = pkts[i];
+
+			rte_pktmbuf_free(pkt);
+		}
+	} else {
+		for ( ; pkts_mask; ) {
+			uint32_t pkt_index = __builtin_ctzll(pkts_mask);
+			uint64_t pkt_mask = 1LLU << pkt_index;
+			struct rte_mbuf *pkt = pkts[pkt_index];
+
+			rte_pktmbuf_free(pkt);
+			pkts_mask &= ~pkt_mask;
+		}
+	}
+
+	return 0;
+}
+
+/*
+ * Summary of port operations
+ */
+struct rte_port_in_ops rte_port_source_ops = {
+	.f_create = rte_port_source_create,
+	.f_free = rte_port_source_free,
+	.f_rx = rte_port_source_rx,
+};
+
+struct rte_port_out_ops rte_port_sink_ops = {
+	.f_create = rte_port_sink_create,
+	.f_free = NULL,
+	.f_tx = rte_port_sink_tx,
+	.f_tx_bulk = rte_port_sink_tx_bulk,
+	.f_flush = NULL,
+};
diff --git a/lib/librte_port/rte_port_source_sink.h b/lib/librte_port/rte_port_source_sink.h
new file mode 100644
index 0000000..cd8070a
--- /dev/null
+++ b/lib/librte_port/rte_port_source_sink.h
@@ -0,0 +1,70 @@
+/*-
+ *   BSD LICENSE
+ * 
+ *   Copyright(c) 2010-2014 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.
+ */
+ 
+#ifndef __INCLUDE_RTE_PORT_SOURCE_SINK_H__
+#define __INCLUDE_RTE_PORT_SOURCE_SINK_H__
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * @file
+ * RTE Port Source/Sink
+ *
+ * source: input port that can be used to generate packets
+ * sink: output port that drops all packets written to it
+ *
+ ***/
+
+#include "rte_port.h"
+
+/** source port parameters */
+struct rte_port_source_params {
+	/** Pre-initialized buffer pool */
+	struct rte_mempool *mempool;
+};
+
+/** source port operations */
+extern struct rte_port_in_ops rte_port_source_ops;
+
+/** sink port parameters: NONE */
+
+/** sink port operations */
+extern struct rte_port_out_ops rte_port_sink_ops;
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
-- 
1.7.7.6