1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
|
/* SPDX-License-Identifier: BSD-3-Clause
* Copyright(c) 2010-2014 Intel Corporation
*/
#include <sys/types.h>
#include <sys/sysctl.h>
#include <sys/mman.h>
#include <string.h>
#include <rte_log.h>
#include <fcntl.h>
#include "eal_hugepages.h"
#include "eal_internal_cfg.h"
#include "eal_filesystem.h"
#define CONTIGMEM_DEV "/dev/contigmem"
/*
* Uses mmap to create a shared memory area for storage of data
* Used in this file to store the hugepage file map on disk
*/
static void *
map_shared_memory(const char *filename, const size_t mem_size, int flags)
{
void *retval;
int fd = open(filename, flags, 0600);
if (fd < 0)
return NULL;
if (ftruncate(fd, mem_size) < 0) {
close(fd);
return NULL;
}
retval = mmap(NULL, mem_size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
close(fd);
return retval;
}
static void *
open_shared_memory(const char *filename, const size_t mem_size)
{
return map_shared_memory(filename, mem_size, O_RDWR);
}
static void *
create_shared_memory(const char *filename, const size_t mem_size)
{
return map_shared_memory(filename, mem_size, O_RDWR | O_CREAT);
}
/*
* No hugepage support on freebsd, but we dummy it, using contigmem driver
*/
int
eal_hugepage_info_init(void)
{
size_t sysctl_size;
int num_buffers, fd, error;
int64_t buffer_size;
/* re-use the linux "internal config" structure for our memory data */
struct hugepage_info *hpi = &internal_config.hugepage_info[0];
struct hugepage_info *tmp_hpi;
unsigned int i;
internal_config.num_hugepage_sizes = 1;
sysctl_size = sizeof(num_buffers);
error = sysctlbyname("hw.contigmem.num_buffers", &num_buffers,
&sysctl_size, NULL, 0);
if (error != 0) {
RTE_LOG(ERR, EAL, "could not read sysctl hw.contigmem.num_buffers\n");
return -1;
}
sysctl_size = sizeof(buffer_size);
error = sysctlbyname("hw.contigmem.buffer_size", &buffer_size,
&sysctl_size, NULL, 0);
if (error != 0) {
RTE_LOG(ERR, EAL, "could not read sysctl hw.contigmem.buffer_size\n");
return -1;
}
fd = open(CONTIGMEM_DEV, O_RDWR);
if (fd < 0) {
RTE_LOG(ERR, EAL, "could not open "CONTIGMEM_DEV"\n");
return -1;
}
if (buffer_size >= 1<<30)
RTE_LOG(INFO, EAL, "Contigmem driver has %d buffers, each of size %dGB\n",
num_buffers, (int)(buffer_size>>30));
else if (buffer_size >= 1<<20)
RTE_LOG(INFO, EAL, "Contigmem driver has %d buffers, each of size %dMB\n",
num_buffers, (int)(buffer_size>>20));
else
RTE_LOG(INFO, EAL, "Contigmem driver has %d buffers, each of size %dKB\n",
num_buffers, (int)(buffer_size>>10));
strlcpy(hpi->hugedir, CONTIGMEM_DEV, sizeof(hpi->hugedir));
hpi->hugepage_sz = buffer_size;
hpi->num_pages[0] = num_buffers;
hpi->lock_descriptor = fd;
/* for no shared files mode, do not create shared memory config */
if (internal_config.no_shconf)
return 0;
tmp_hpi = create_shared_memory(eal_hugepage_info_path(),
sizeof(internal_config.hugepage_info));
if (tmp_hpi == NULL ) {
RTE_LOG(ERR, EAL, "Failed to create shared memory!\n");
return -1;
}
memcpy(tmp_hpi, hpi, sizeof(internal_config.hugepage_info));
/* we've copied file descriptors along with everything else, but they
* will be invalid in secondary process, so overwrite them
*/
for (i = 0; i < RTE_DIM(internal_config.hugepage_info); i++) {
struct hugepage_info *tmp = &tmp_hpi[i];
tmp->lock_descriptor = -1;
}
if (munmap(tmp_hpi, sizeof(internal_config.hugepage_info)) < 0) {
RTE_LOG(ERR, EAL, "Failed to unmap shared memory!\n");
return -1;
}
return 0;
}
/* copy stuff from shared info into internal config */
int
eal_hugepage_info_read(void)
{
struct hugepage_info *hpi = &internal_config.hugepage_info[0];
struct hugepage_info *tmp_hpi;
internal_config.num_hugepage_sizes = 1;
tmp_hpi = open_shared_memory(eal_hugepage_info_path(),
sizeof(internal_config.hugepage_info));
if (tmp_hpi == NULL) {
RTE_LOG(ERR, EAL, "Failed to open shared memory!\n");
return -1;
}
memcpy(hpi, tmp_hpi, sizeof(internal_config.hugepage_info));
if (munmap(tmp_hpi, sizeof(internal_config.hugepage_info)) < 0) {
RTE_LOG(ERR, EAL, "Failed to unmap shared memory!\n");
return -1;
}
return 0;
}
|
