[dpdk-dev] [PATCH 06/29] Packet Framework librte_port: ethdev ports

Cristian Dumitrescu cristian.dumitrescu at intel.com
Tue May 27 19:09:29 CEST 2014


The input port ethdev_reader implements the Packet Framework port API on top of the Intel DPDK poll mode driver for a NIC RX queue.

The output port ethdev_writer implements the Packet Framework port API on top of the Intel DPDK poll mode driver for a NIC TX queue.

Signed-off-by: Cristian Dumitrescu <cristian.dumitrescu at intel.com>
---
 lib/librte_port/rte_port_ethdev.c |  306 +++++++++++++++++++++++++++++++++++++
 lib/librte_port/rte_port_ethdev.h |   86 +++++++++++
 2 files changed, 392 insertions(+), 0 deletions(-)
 create mode 100644 lib/librte_port/rte_port_ethdev.c
 create mode 100644 lib/librte_port/rte_port_ethdev.h

diff --git a/lib/librte_port/rte_port_ethdev.c b/lib/librte_port/rte_port_ethdev.c
new file mode 100644
index 0000000..7871e7a
--- /dev/null
+++ b/lib/librte_port/rte_port_ethdev.c
@@ -0,0 +1,306 @@
+/*-
+ *   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 <string.h>
+
+#include <rte_mbuf.h>
+#include <rte_ethdev.h>
+#include <rte_malloc.h>
+
+#include "rte_port_ethdev.h"
+
+/*
+ * Port ETHDEV Reader
+ */
+struct rte_port_ethdev_reader {
+	uint16_t queue_id;
+	uint8_t port_id;
+};
+
+static void *
+rte_port_ethdev_reader_create(void *params, int socket_id)
+{
+	struct rte_port_ethdev_reader_params *conf =
+			(struct rte_port_ethdev_reader_params *) params;
+	struct rte_port_ethdev_reader *port;
+
+	/* Check input parameters */
+	if (conf == NULL) {
+		RTE_LOG(ERR, PORT, "%s: params is NULL\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->port_id = conf->port_id;
+	port->queue_id = conf->queue_id;
+
+	return port;
+}
+
+static int
+rte_port_ethdev_reader_rx(void *port, struct rte_mbuf **pkts, uint32_t n_pkts)
+{
+	struct rte_port_ethdev_reader *p = (struct rte_port_ethdev_reader *) port;
+
+	return rte_eth_rx_burst(p->port_id, p->queue_id, pkts, n_pkts);
+}
+
+static int
+rte_port_ethdev_reader_free(void *port)
+{
+	if (port == NULL) {
+		RTE_LOG(ERR, PORT, "%s: port is NULL\n", __func__);
+		return -EINVAL;
+	}
+
+	rte_free(port);
+
+	return 0;
+}
+
+/*
+ * Port ETHDEV Writer
+ */
+#define RTE_PORT_ETHDEV_WRITER_APPROACH                  1
+
+struct rte_port_ethdev_writer {
+	struct rte_mbuf *tx_buf[2 * RTE_PORT_IN_BURST_SIZE_MAX];
+	uint32_t tx_burst_sz;
+	uint16_t tx_buf_count;
+	uint64_t bsz_mask;
+	uint16_t queue_id;
+	uint8_t port_id;
+};
+
+static void *
+rte_port_ethdev_writer_create(void *params, int socket_id)
+{
+	struct rte_port_ethdev_writer_params *conf =
+			(struct rte_port_ethdev_writer_params *) params;
+	struct rte_port_ethdev_writer *port;
+
+	/* Check input parameters */
+	if ((conf == NULL) ||
+	    (conf->tx_burst_sz == 0) ||
+	    (conf->tx_burst_sz > RTE_PORT_IN_BURST_SIZE_MAX) ||
+		(!rte_is_power_of_2(conf->tx_burst_sz))) {
+		RTE_LOG(ERR, PORT, "%s: Invalid input parameters\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->port_id = conf->port_id;
+	port->queue_id = conf->queue_id;
+	port->tx_burst_sz = conf->tx_burst_sz;
+	port->tx_buf_count = 0;
+	port->bsz_mask = 1LLU << (conf->tx_burst_sz - 1);
+
+	return port;
+}
+
+static inline void
+send_burst(struct rte_port_ethdev_writer *p)
+{
+	uint32_t nb_tx;
+
+	nb_tx = rte_eth_tx_burst(p->port_id, p->queue_id,
+			 p->tx_buf, p->tx_buf_count);
+
+	for ( ; nb_tx < p->tx_buf_count; nb_tx ++) {
+		rte_pktmbuf_free(p->tx_buf[nb_tx]);
+	}
+
+	p->tx_buf_count = 0;
+}
+
+static int
+rte_port_ethdev_writer_tx(void *port, struct rte_mbuf *pkt)
+{
+	struct rte_port_ethdev_writer *p = (struct rte_port_ethdev_writer *) port;
+
+	p->tx_buf[p->tx_buf_count ++] = pkt;
+	if (p->tx_buf_count >= p->tx_burst_sz) {
+		send_burst(p);
+	}
+
+	return 0;
+}
+
+#if RTE_PORT_ETHDEV_WRITER_APPROACH == 0
+
+static int
+rte_port_ethdev_writer_tx_bulk(void *port,
+		struct rte_mbuf **pkts,
+		uint64_t pkts_mask)
+{
+	struct rte_port_ethdev_writer *p = (struct rte_port_ethdev_writer *) port;
+
+	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];
+
+			p->tx_buf[p->tx_buf_count ++] = pkt;
+			if (p->tx_buf_count >= p->tx_burst_sz) {
+				send_burst(p);
+			}
+		}
+	} 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];
+
+			p->tx_buf[p->tx_buf_count ++] = pkt;
+			if (p->tx_buf_count >= p->tx_burst_sz) {
+				send_burst(p);
+			}
+			pkts_mask &= ~pkt_mask;
+		}
+	}
+
+	return 0;
+}
+
+#elif RTE_PORT_ETHDEV_WRITER_APPROACH == 1
+
+static int
+rte_port_ethdev_writer_tx_bulk(void *port,
+		struct rte_mbuf **pkts,
+		uint64_t pkts_mask)
+{
+	struct rte_port_ethdev_writer *p = (struct rte_port_ethdev_writer *) port;
+	uint32_t bsz_mask = p->bsz_mask;
+	uint32_t tx_buf_count = p->tx_buf_count;
+	uint64_t expr = (pkts_mask & (pkts_mask + 1)) |
+			((pkts_mask & bsz_mask) ^ bsz_mask);
+
+	if (expr == 0) {
+		uint64_t n_pkts = __builtin_popcountll(pkts_mask);
+		uint32_t n_pkts_ok;
+
+		if (tx_buf_count) {
+			send_burst(p);
+		}
+
+		n_pkts_ok = rte_eth_tx_burst(p->port_id, p->queue_id, pkts, n_pkts);
+
+		for ( ; n_pkts_ok < n_pkts; n_pkts_ok ++) {
+			struct rte_mbuf *pkt = pkts[n_pkts_ok];
+
+			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];
+
+			p->tx_buf[tx_buf_count ++] = pkt;
+			pkts_mask &= ~pkt_mask;
+		}
+
+		p->tx_buf_count = tx_buf_count;
+		if (tx_buf_count >= p->tx_burst_sz) {
+			send_burst(p);
+		}
+	}
+
+	return 0;
+}
+
+#else
+
+#error Invalid value for RTE_PORT_ETHDEV_WRITER_APPROACH
+
+#endif
+
+static int
+rte_port_ethdev_writer_flush(void *port)
+{
+	struct rte_port_ethdev_writer *p = (struct rte_port_ethdev_writer *) port;
+
+	if (p->tx_buf_count > 0) {
+		send_burst(p);
+	}
+
+	return 0;
+}
+
+static int
+rte_port_ethdev_writer_free(void *port)
+{
+	if (port == NULL) {
+		RTE_LOG(ERR, PORT, "%s: Port is NULL\n", __func__);
+		return -EINVAL;
+	}
+
+	rte_port_ethdev_writer_flush(port);
+	rte_free(port);
+
+	return 0;
+}
+
+/*
+ * Summary of port operations
+ */
+struct rte_port_in_ops rte_port_ethdev_reader_ops = {
+	.f_create = rte_port_ethdev_reader_create,
+	.f_free = rte_port_ethdev_reader_free,
+	.f_rx = rte_port_ethdev_reader_rx,
+};
+
+struct rte_port_out_ops rte_port_ethdev_writer_ops = {
+	.f_create = rte_port_ethdev_writer_create,
+	.f_free = rte_port_ethdev_writer_free,
+	.f_tx = rte_port_ethdev_writer_tx,
+	.f_tx_bulk = rte_port_ethdev_writer_tx_bulk,
+	.f_flush = rte_port_ethdev_writer_flush,
+};
diff --git a/lib/librte_port/rte_port_ethdev.h b/lib/librte_port/rte_port_ethdev.h
new file mode 100644
index 0000000..2096cdc
--- /dev/null
+++ b/lib/librte_port/rte_port_ethdev.h
@@ -0,0 +1,86 @@
+/*-
+ *   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_ETHDEV_H__
+#define __INCLUDE_RTE_PORT_ETHDEV_H__
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * @file
+ * RTE Port Ethernet Device
+ *
+ * ethdev_reader: input port built on top of pre-initialized NIC RX queue
+ * ethdev_writer: output port built on top of pre-initialized NIC TX queue
+ *
+ ***/
+
+#include <stdint.h>
+
+#include "rte_port.h"
+
+/** ethdev_reader port parameters */
+struct rte_port_ethdev_reader_params {
+	/** NIC RX port ID */
+	uint8_t port_id;
+	
+	/** NIC RX queue ID */
+	uint16_t queue_id; 
+};
+
+/** ethdev_reader port operations */
+extern struct rte_port_in_ops rte_port_ethdev_reader_ops;
+
+/** ethdev_writer port parameters */
+struct rte_port_ethdev_writer_params {
+	/** NIC RX port ID */
+	uint8_t port_id;
+	
+	/** NIC RX queue ID */
+	uint16_t queue_id;
+	
+	/** Recommended burst size to NIC TX queue. The actual burst size can be 
+	    bigger or smaller than this value. */
+	uint32_t tx_burst_sz;
+};
+
+/** ethdev_writer port operations */
+extern struct rte_port_out_ops rte_port_ethdev_writer_ops;
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
-- 
1.7.7.6



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