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
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
|
/*
* Copyright (c) 2018 Cisco and/or its affiliates.
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <unistd.h>
#include <sys/types.h>
#include <sys/mount.h>
#include <sys/mman.h>
#include <sys/fcntl.h>
#include <sys/stat.h>
#include <unistd.h>
#include <vppinfra/linux/syscall.h>
#include <vppinfra/linux/sysfs.h>
#include <vlib/vlib.h>
#include <vlib/physmem.h>
#include <vlib/unix/unix.h>
#include <vlib/pci/pci.h>
#include <vlib/linux/vfio.h>
#if defined(__x86_64__) && !defined(CLIB_SANITIZE_ADDR)
/* we keep physmem in low 38 bits of VA address space as some
IOMMU implamentation cannot map above that range */
#define VLIB_PHYSMEM_DEFAULT_BASE_ADDDR (1ULL << 36)
#else
/* let kernel decide */
#define VLIB_PHYSMEM_DEFAULT_BASE_ADDDR 0
#endif
clib_error_t *
vlib_physmem_shared_map_create (vlib_main_t * vm, char *name, uword size,
u32 log2_page_sz, u32 numa_node,
u32 * map_index)
{
clib_pmalloc_main_t *pm = vm->physmem_main.pmalloc_main;
vlib_physmem_main_t *vpm = &vm->physmem_main;
vlib_physmem_map_t *map;
clib_pmalloc_arena_t *a;
clib_error_t *error = 0;
void *va;
uword i;
va = clib_pmalloc_create_shared_arena (pm, name, size, log2_page_sz,
numa_node);
if (va == 0)
return clib_error_return (0, "%U", format_clib_error,
clib_pmalloc_last_error (pm));
a = clib_pmalloc_get_arena (pm, va);
pool_get (vpm->maps, map);
*map_index = map->index = map - vpm->maps;
map->base = va;
map->fd = a->fd;
map->n_pages = a->n_pages * a->subpages_per_page;
map->log2_page_size = a->log2_subpage_sz;
map->numa_node = a->numa_node;
for (i = 0; i < a->n_pages; i++)
{
uword pa =
clib_pmalloc_get_pa (pm, (u8 *) va + (i << a->log2_subpage_sz));
/* maybe iova */
if (pa == 0)
pa = pointer_to_uword (va);
vec_add1 (map->page_table, pa);
}
return error;
}
vlib_physmem_map_t *
vlib_physmem_get_map (vlib_main_t * vm, u32 index)
{
vlib_physmem_main_t *vpm = &vm->physmem_main;
return pool_elt_at_index (vpm->maps, index);
}
clib_error_t *
vlib_physmem_init (vlib_main_t * vm)
{
vlib_physmem_main_t *vpm = &vm->physmem_main;
clib_error_t *error = 0;
u64 *pt = 0;
void *p;
/* check if pagemap is accessible */
pt = clib_mem_vm_get_paddr (&pt, min_log2 (sysconf (_SC_PAGESIZE)), 1);
if (pt && pt[0])
vpm->flags |= VLIB_PHYSMEM_MAIN_F_HAVE_PAGEMAP;
vec_free (pt);
if ((error = linux_vfio_init (vm)))
return error;
p = clib_mem_alloc_aligned (sizeof (clib_pmalloc_main_t),
CLIB_CACHE_LINE_BYTES);
memset (p, 0, sizeof (clib_pmalloc_main_t));
vpm->pmalloc_main = (clib_pmalloc_main_t *) p;
if (vpm->base_addr == 0)
vpm->base_addr = VLIB_PHYSMEM_DEFAULT_BASE_ADDDR;
clib_pmalloc_init (vpm->pmalloc_main, vpm->base_addr, vpm->max_size);
/* update base_addr and max_size per actual allocation */
vpm->base_addr = (uword) vpm->pmalloc_main->base;
vpm->max_size = (uword) vpm->pmalloc_main->max_pages <<
vpm->pmalloc_main->def_log2_page_sz;
return error;
}
static clib_error_t *
show_physmem (vlib_main_t * vm,
unformat_input_t * input, vlib_cli_command_t * cmd)
{
vlib_physmem_main_t *vpm = &vm->physmem_main;
unformat_input_t _line_input, *line_input = &_line_input;
u32 verbose = 0, map = 0;
if (unformat_user (input, unformat_line_input, line_input))
{
while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
{
if (unformat (line_input, "verbose"))
verbose = 1;
else if (unformat (line_input, "v"))
verbose = 1;
else if (unformat (line_input, "detail"))
verbose = 2;
else if (unformat (line_input, "d"))
verbose = 2;
else if (unformat (line_input, "map"))
map = 1;
else
break;
}
unformat_free (line_input);
}
if (map)
vlib_cli_output (vm, " %U", format_pmalloc_map, vpm->pmalloc_main);
else
vlib_cli_output (vm, " %U", format_pmalloc, vpm->pmalloc_main, verbose);
return 0;
}
/* *INDENT-OFF* */
VLIB_CLI_COMMAND (show_physmem_command, static) = {
.path = "show physmem",
.short_help = "show physmem [verbose | detail | map]",
.function = show_physmem,
};
/* *INDENT-ON* */
static clib_error_t *
vlib_physmem_config (vlib_main_t * vm, unformat_input_t * input)
{
vlib_physmem_main_t *vpm = &vm->physmem_main;
while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
{
if (unformat (input, "base-addr 0x%lx", &vpm->base_addr))
;
else
return unformat_parse_error (input);
}
unformat_free (input);
return 0;
}
VLIB_EARLY_CONFIG_FUNCTION (vlib_physmem_config, "physmem");
/*
* fd.io coding-style-patch-verification: ON
*
* Local Variables:
* eval: (c-set-style "gnu")
* End:
*/
|
