e98903d382566be2ccbed2eb5b9df8938c79f118
[dpdk.git] / lib / librte_eal / common / eal_common_tailqs.c
1 /*-
2  *   BSD LICENSE
3  * 
4  *   Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
5  *   All rights reserved.
6  * 
7  *   Redistribution and use in source and binary forms, with or without
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 <sys/queue.h>
35 #include <stdint.h>
36 #include <errno.h>
37 #include <stdio.h>
38 #include <stdarg.h>
39 #include <string.h>
40 #include <inttypes.h>
41
42 #include <rte_memory.h>
43 #include <rte_memzone.h>
44 #include <rte_launch.h>
45 #include <rte_tailq.h>
46 #include <rte_eal.h>
47 #include <rte_eal_memconfig.h>
48 #include <rte_per_lcore.h>
49 #include <rte_lcore.h>
50 #include <rte_memory.h>
51 #include <rte_atomic.h>
52 #include <rte_branch_prediction.h>
53 #include <rte_log.h>
54 #include <rte_string_fns.h>
55
56 #include "eal_private.h"
57
58 /**
59  * Name of tailq_head
60  */
61 const char* rte_tailq_names[RTE_MAX_TAILQ] = {
62 #define rte_tailq_elem(idx, name)     name,
63 #include <rte_tailq_elem.h>
64 };
65
66 struct rte_tailq_head *
67 rte_eal_tailq_lookup(const char *name)
68 {
69         unsigned i;
70         struct rte_mem_config *mcfg = rte_eal_get_configuration()->mem_config;
71
72         if (name == NULL)
73                 return NULL;
74
75         for (i = 0; i < RTE_MAX_TAILQ; i++) {
76                 if (rte_tailq_names[i] == NULL)
77                         continue;
78                 if (!strncmp(name, rte_tailq_names[i], RTE_TAILQ_NAMESIZE-1))
79                         return &mcfg->tailq_head[i];
80         }
81
82         return NULL;
83 }
84
85 inline struct rte_tailq_head *
86 rte_eal_tailq_lookup_by_idx(const unsigned tailq_idx)
87 {
88         struct rte_mem_config *mcfg = rte_eal_get_configuration()->mem_config;
89
90         if (tailq_idx >= RTE_MAX_TAILQ) {
91                 RTE_LOG(ERR, EAL, "%s(): No more room in config\n", __func__);
92                 return NULL;
93         }
94
95         return &mcfg->tailq_head[tailq_idx];
96 }
97
98 struct rte_tailq_head *
99 rte_eal_tailq_reserve(const char *name)
100 {
101         return rte_eal_tailq_lookup(name);
102 }
103
104 inline struct rte_tailq_head *
105 rte_eal_tailq_reserve_by_idx(const unsigned tailq_idx)
106 {
107         return rte_eal_tailq_lookup_by_idx(tailq_idx);
108 }
109
110 void
111 rte_dump_tailq(void)
112 {
113         struct rte_mem_config *mcfg;
114         unsigned i = 0;
115
116         mcfg = rte_eal_get_configuration()->mem_config;
117
118         rte_rwlock_read_lock(&mcfg->qlock);
119         for (i=0; i < RTE_MAX_TAILQ; i++) {
120                 const struct rte_tailq_head *tailq = &mcfg->tailq_head[i];
121                 const struct rte_dummy_head *head = &tailq->tailq_head;
122
123                 printf("Tailq %u: qname:<%s>, tqh_first:%p, tqh_last:%p\n", i,
124                        (rte_tailq_names[i] != NULL ? rte_tailq_names[i]:"nil"),
125                        head->tqh_first, head->tqh_last);
126         }
127         rte_rwlock_read_unlock(&mcfg->qlock);
128 }
129
130 int
131 rte_eal_tailqs_init(void)
132 {
133         unsigned i;
134         struct rte_mem_config *mcfg = NULL; 
135
136         RTE_BUILD_BUG_ON(RTE_MAX_TAILQ < RTE_TAILQ_NUM);
137
138         if (rte_eal_process_type() == RTE_PROC_PRIMARY) {
139                 mcfg = rte_eal_get_configuration()->mem_config;
140                 for (i = 0; i < RTE_MAX_TAILQ; i++)
141                         TAILQ_INIT(&mcfg->tailq_head[i].tailq_head);
142         }
143
144         return 0;
145 }
146