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
|
/*
* Copyright (c) 2010. QLogic Corporation. All rights reserved.
*
* This software is available to you under a choice of one of two
* licenses. You may choose to be licensed under the terms of the GNU
* General Public License (GPL) Version 2, available from the file
* COPYING in the main directory of this source tree, or the
* OpenIB.org BSD license below:
*
* Redistribution and use in source and binary forms, with or
* without modification, are permitted provided that the following
* conditions are met:
*
* - Redistributions of source code must retain the above
* copyright notice, this list of conditions and the following
* disclaimer.
*
* - Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#include <sys/types.h>
#include <stdint.h>
#include <fcntl.h>
#include <signal.h>
#include "psm_user.h"
#include "psm_mq_internal.h"
#include "psm_am_internal.h"
#include "knemrw.h"
int knem_open_device()
{
/* Process wide knem handle */
static int fd = -1;
#if defined(PSM_USE_KNEM)
if (fd >= 0)
return fd;
fd = open(KNEM_DEVICE_FILENAME, O_RDWR);
#endif
return fd;
}
int64_t knem_get(int fd, int64_t cookie, const void *src, int64_t n)
{
#if defined(PSM_USE_KNEM)
struct knem_cmd_inline_copy c;
struct knem_cmd_param_iovec iov;
int err;
iov.base = (uint64_t) (uintptr_t) src;
iov.len = n;
c.local_iovec_array = (uintptr_t) &iov;
c.local_iovec_nr = 1;
c.remote_cookie = cookie;
c.remote_offset = 0;
c.write = 0; /* Do a Read/Get from remote memory region */
c.flags = 0;
err = ioctl(fd, KNEM_CMD_INLINE_COPY, &c);
if (c.current_status != KNEM_STATUS_SUCCESS) {
_IPATH_INFO("KNEM: Get request of size 0x%"PRIx64" failed with error %d.\n",
n, c.current_status);
err = c.current_status;
}
return err;
#else
psmi_handle_error(PSMI_EP_NORETURN, PSM_INTERNAL_ERR,
"Attempt to use KNEM kassist (get), support for which has "
"not been compiled in.");
return PSM_INTERNAL_ERR;
#endif
}
int64_t knem_put(int fd, const void *src, int64_t n, int64_t cookie)
{
#if defined(PSM_USE_KNEM)
struct knem_cmd_inline_copy c;
struct knem_cmd_param_iovec iov;
int err;
iov.base = (uint64_t) (uintptr_t) src;
iov.len = n;
c.local_iovec_array = (uintptr_t) &iov;
c.local_iovec_nr = 1;
c.remote_cookie = cookie;
c.remote_offset = 0;
c.write = 1; /* Do a Write/Put to remote memory region */
c.flags = 0;
err = ioctl(fd, KNEM_CMD_INLINE_COPY, &c);
if (c.current_status != KNEM_STATUS_SUCCESS) {
_IPATH_INFO("KNEM: Put request of size 0x%"PRIx64" failed with error %d.\n",
n, c.current_status);
err = c.current_status;
}
return err;
#else
psmi_handle_error(PSMI_EP_NORETURN, PSM_INTERNAL_ERR,
"Attempt to use KNEM kassist (put), support for which has "
"not been compiled in.");
return PSM_INTERNAL_ERR;
#endif
}
int64_t knem_register_region(void *buffer, size_t len, int write)
{
#if defined(PSM_USE_KNEM)
struct knem_cmd_create_region create;
struct knem_cmd_param_iovec iov;
iov.base = (uint64_t) (uintptr_t) buffer;
iov.len = len;
create.iovec_array = (uintptr_t) &iov;
create.iovec_nr = 1;
create.flags = KNEM_FLAG_SINGLEUSE; /* Automatically destroy after put */
create.protection = write ? PROT_WRITE : PROT_READ;
/* AV: Handle failure in memory registration */
ioctl(psmi_kassist_fd, KNEM_CMD_CREATE_REGION, &create);
return create.cookie; /* Cookie for registered memory region */
#else
psmi_handle_error(PSMI_EP_NORETURN, PSM_INTERNAL_ERR,
"Attempt to use KNEM kassist (reg), support for which has "
"not been compiled in.");
return 0;
#endif
}
|
