b6264fcf59b9677cc1cfe412cbd2fa5fa740e035
[deb_dpdk.git] / examples / quota_watermark / qw / init.c
1 /*-
2  *   BSD LICENSE
3  *
4  *   Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
5  *   All rights reserved.
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8  *   modification, are permitted provided that the following conditions
9  *   are met:
10  *
11  *     * Redistributions of source code must retain the above copyright
12  *       notice, this list of conditions and the following disclaimer.
13  *     * Redistributions in binary form must reproduce the above copyright
14  *       notice, this list of conditions and the following disclaimer in
15  *       the documentation and/or other materials provided with the
16  *       distribution.
17  *     * Neither the name of Intel Corporation nor the names of its
18  *       contributors may be used to endorse or promote products derived
19  *       from this software without specific prior written permission.
20  *
21  *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
22  *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
23  *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
24  *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
25  *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
26  *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
27  *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
28  *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
29  *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
30  *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
31  *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32  */
33
34 #include <fcntl.h>
35 #include <unistd.h>
36 #include <sys/mman.h>
37
38 #include <rte_eal.h>
39
40 #include <rte_common.h>
41 #include <rte_errno.h>
42 #include <rte_ethdev.h>
43 #include <rte_memzone.h>
44 #include <rte_ring.h>
45 #include <rte_string_fns.h>
46
47 #include "args.h"
48 #include "init.h"
49 #include "main.h"
50 #include "../include/conf.h"
51
52
53 static const struct rte_eth_conf port_conf = {
54                 .rxmode = {
55                         .split_hdr_size = 0,
56                         .header_split   = 0, /**< Header Split disabled */
57                         .hw_ip_checksum = 0, /**< IP csum offload disabled */
58                         .hw_vlan_filter = 0, /**< VLAN filtering disabled */
59                         .jumbo_frame    = 0, /**< Jumbo Frame disabled */
60                         .hw_strip_crc   = 1, /**< CRC stripped by hardware */
61                 },
62                 .txmode = {
63                         .mq_mode = ETH_DCB_NONE,
64                 },
65 };
66
67 static struct rte_eth_fc_conf fc_conf = {
68                 .mode       = RTE_FC_TX_PAUSE,
69                 .high_water = 80 * 510 / 100,
70                 .low_water  = 60 * 510 / 100,
71                 .pause_time = 1337,
72                 .send_xon   = 0,
73 };
74
75
76 void configure_eth_port(uint8_t port_id)
77 {
78         int ret;
79
80         rte_eth_dev_stop(port_id);
81
82         ret = rte_eth_dev_configure(port_id, 1, 1, &port_conf);
83         if (ret < 0)
84                 rte_exit(EXIT_FAILURE, "Cannot configure port %u (error %d)\n",
85                                 (unsigned int) port_id, ret);
86
87         /* Initialize the port's RX queue */
88         ret = rte_eth_rx_queue_setup(port_id, 0, RX_DESC_PER_QUEUE,
89                         rte_eth_dev_socket_id(port_id),
90                         NULL,
91                         mbuf_pool);
92         if (ret < 0)
93                 rte_exit(EXIT_FAILURE,
94                                 "Failed to setup RX queue on port %u (error %d)\n",
95                                 (unsigned int) port_id, ret);
96
97         /* Initialize the port's TX queue */
98         ret = rte_eth_tx_queue_setup(port_id, 0, TX_DESC_PER_QUEUE,
99                         rte_eth_dev_socket_id(port_id),
100                         NULL);
101         if (ret < 0)
102                 rte_exit(EXIT_FAILURE,
103                                 "Failed to setup TX queue on port %u (error %d)\n",
104                                 (unsigned int) port_id, ret);
105
106         /* Initialize the port's flow control */
107         ret = rte_eth_dev_flow_ctrl_set(port_id, &fc_conf);
108         if (ret < 0)
109                 rte_exit(EXIT_FAILURE,
110                                 "Failed to setup hardware flow control on port %u (error %d)\n",
111                                 (unsigned int) port_id, ret);
112
113         /* Start the port */
114         ret = rte_eth_dev_start(port_id);
115         if (ret < 0)
116                 rte_exit(EXIT_FAILURE, "Failed to start port %u (error %d)\n",
117                                 (unsigned int) port_id, ret);
118
119         /* Put it in promiscuous mode */
120         rte_eth_promiscuous_enable(port_id);
121 }
122
123 void
124 init_dpdk(void)
125 {
126         if (rte_eth_dev_count() < 2)
127                 rte_exit(EXIT_FAILURE, "Not enough ethernet port available\n");
128 }
129
130 void init_ring(int lcore_id, uint8_t port_id)
131 {
132         struct rte_ring *ring;
133         char ring_name[RTE_RING_NAMESIZE];
134
135         snprintf(ring_name, RTE_RING_NAMESIZE,
136                         "core%d_port%d", lcore_id, port_id);
137         ring = rte_ring_create(ring_name, RING_SIZE, rte_socket_id(),
138                         RING_F_SP_ENQ | RING_F_SC_DEQ);
139
140         if (ring == NULL)
141                 rte_exit(EXIT_FAILURE, "%s\n", rte_strerror(rte_errno));
142
143         *high_watermark = 80 * RING_SIZE / 100;
144
145         rings[lcore_id][port_id] = ring;
146 }
147
148 void
149 pair_ports(void)
150 {
151         uint8_t i, j;
152
153         /* Pair ports with their "closest neighbour" in the portmask */
154         for (i = 0; i < RTE_MAX_ETHPORTS; i++)
155                 if (is_bit_set(i, portmask))
156                         for (j = (uint8_t) (i + 1); j < RTE_MAX_ETHPORTS; j++)
157                                 if (is_bit_set(j, portmask)) {
158                                         port_pairs[i] = j;
159                                         port_pairs[j] = i;
160                                         i = j;
161                                         break;
162                                 }
163 }
164
165 void
166 setup_shared_variables(void)
167 {
168         const struct rte_memzone *qw_memzone;
169
170         qw_memzone = rte_memzone_reserve(QUOTA_WATERMARK_MEMZONE_NAME,
171                         3 * sizeof(int), rte_socket_id(), 0);
172         if (qw_memzone == NULL)
173                 rte_exit(EXIT_FAILURE, "%s\n", rte_strerror(rte_errno));
174
175         quota = qw_memzone->addr;
176         low_watermark = (unsigned int *) qw_memzone->addr + 1;
177         high_watermark = (unsigned int *) qw_memzone->addr + 2;
178 }