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
|
/* SPDX-License-Identifier: BSD-3-Clause
* Copyright 2017 6WIND S.A.
* Copyright 2017 Mellanox Technologies, Ltd
*/
/**
* @file
* Utility functions used by the mlx4 driver.
*/
#include <assert.h>
#include <errno.h>
#include <fcntl.h>
#include <stddef.h>
#include <stdint.h>
#include <rte_errno.h>
#include <rte_malloc.h>
#include <rte_memory.h>
#include "mlx4_utils.h"
/**
* Make a file descriptor non-blocking.
*
* @param fd
* File descriptor to alter.
*
* @return
* 0 on success, negative errno value otherwise and rte_errno is set.
*/
int
mlx4_fd_set_non_blocking(int fd)
{
int ret = fcntl(fd, F_GETFL);
if (ret != -1 && !fcntl(fd, F_SETFL, ret | O_NONBLOCK))
return 0;
assert(errno);
rte_errno = errno;
return -rte_errno;
}
/**
* Internal helper to allocate memory once for several disparate objects.
*
* The most restrictive alignment constraint for standard objects is assumed
* to be sizeof(double) and is used as a default value.
*
* C11 code would include stdalign.h and use alignof(max_align_t) however
* we'll stick with C99 for the time being.
*/
static inline size_t
mlx4_mallocv_inline(const char *type, const struct mlx4_malloc_vec *vec,
unsigned int cnt, int zero, int socket)
{
unsigned int i;
size_t size;
size_t least;
uint8_t *data = NULL;
int fill = !vec[0].addr;
fill:
size = 0;
least = 0;
for (i = 0; i < cnt; ++i) {
size_t align = (uintptr_t)vec[i].align;
if (!align) {
align = sizeof(double);
} else if (!rte_is_power_of_2(align)) {
rte_errno = EINVAL;
goto error;
}
if (least < align)
least = align;
align = RTE_ALIGN_CEIL(size, align);
size = align + vec[i].size;
if (fill && vec[i].addr)
*vec[i].addr = data + align;
}
if (fill)
return size;
if (!zero)
data = rte_malloc_socket(type, size, least, socket);
else
data = rte_zmalloc_socket(type, size, least, socket);
if (data) {
fill = 1;
goto fill;
}
rte_errno = ENOMEM;
error:
for (i = 0; i != cnt; ++i)
if (vec[i].addr)
*vec[i].addr = NULL;
return 0;
}
/**
* Allocate memory once for several disparate objects.
*
* This function adds iovec-like semantics (e.g. readv()) to rte_malloc().
* Memory is allocated once for several contiguous objects of nonuniform
* sizes and alignment constraints.
*
* Each entry of @p vec describes the size, alignment constraint and
* provides a buffer address where the resulting object pointer must be
* stored.
*
* The buffer of the first entry is guaranteed to point to the beginning of
* the allocated region and is safe to use with rte_free().
*
* NULL buffers are silently ignored.
*
* Providing a NULL buffer in the first entry prevents this function from
* allocating any memory but has otherwise no effect on its behavior. In
* this case, the contents of remaining non-NULL buffers are updated with
* addresses relative to zero (i.e. offsets that would have been used during
* the allocation).
*
* @param[in] type
* A string identifying the type of allocated objects (useful for debug
* purposes, such as identifying the cause of a memory leak). Can be NULL.
* @param[in, out] vec
* Description of objects to allocate memory for.
* @param cnt
* Number of entries in @p vec.
*
* @return
* Size in bytes of the allocated region including any padding. In case of
* error, rte_errno is set, 0 is returned and NULL is stored in the
* non-NULL buffers pointed by @p vec.
*
* @see struct mlx4_malloc_vec
* @see rte_malloc()
*/
size_t
mlx4_mallocv(const char *type, const struct mlx4_malloc_vec *vec,
unsigned int cnt)
{
return mlx4_mallocv_inline(type, vec, cnt, 0, SOCKET_ID_ANY);
}
/**
* Combines the semantics of mlx4_mallocv() with those of rte_zmalloc().
*
* @see mlx4_mallocv()
* @see rte_zmalloc()
*/
size_t
mlx4_zmallocv(const char *type, const struct mlx4_malloc_vec *vec,
unsigned int cnt)
{
return mlx4_mallocv_inline(type, vec, cnt, 1, SOCKET_ID_ANY);
}
/**
* Socket-aware version of mlx4_mallocv().
*
* This function takes one additional parameter.
*
* @param socket
* NUMA socket to allocate memory on. If SOCKET_ID_ANY is used, this
* function will behave the same as mlx4_mallocv().
*
* @see mlx4_mallocv()
* @see rte_malloc_socket()
*/
size_t
mlx4_mallocv_socket(const char *type, const struct mlx4_malloc_vec *vec,
unsigned int cnt, int socket)
{
return mlx4_mallocv_inline(type, vec, cnt, 0, socket);
}
/**
* Combines the semantics of mlx4_mallocv_socket() with those of
* mlx4_zmalloc_socket().
*
* @see mlx4_mallocv_socket()
* @see rte_zmalloc_socket()
*/
size_t
mlx4_zmallocv_socket(const char *type, const struct mlx4_malloc_vec *vec,
unsigned int cnt, int socket)
{
return mlx4_mallocv_inline(type, vec, cnt, 1, socket);
}
|
