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
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
|
/*
* Copyright (c) 2014, Mellanox Technologies inc. 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 <linux/pci.h>
#include <linux/mlx5/driver.h>
#include "mlx5_core.h"
#ifdef CONFIG_MLX5_CORE_EN
#include "eswitch.h"
#endif
bool mlx5_sriov_is_enabled(struct mlx5_core_dev *dev)
{
struct mlx5_core_sriov *sriov = &dev->priv.sriov;
return !!sriov->num_vfs;
}
static int mlx5_device_enable_sriov(struct mlx5_core_dev *dev, int num_vfs)
{
struct mlx5_core_sriov *sriov = &dev->priv.sriov;
int err;
int vf;
if (sriov->enabled_vfs) {
mlx5_core_warn(dev,
"failed to enable SRIOV on device, already enabled with %d vfs\n",
sriov->enabled_vfs);
return -EBUSY;
}
#ifdef CONFIG_MLX5_CORE_EN
err = mlx5_eswitch_enable_sriov(dev->priv.eswitch, num_vfs, SRIOV_LEGACY);
if (err) {
mlx5_core_warn(dev,
"failed to enable eswitch SRIOV (%d)\n", err);
return err;
}
#endif
for (vf = 0; vf < num_vfs; vf++) {
err = mlx5_core_enable_hca(dev, vf + 1);
if (err) {
mlx5_core_warn(dev, "failed to enable VF %d (%d)\n", vf, err);
continue;
}
sriov->vfs_ctx[vf].enabled = 1;
sriov->enabled_vfs++;
mlx5_core_dbg(dev, "successfully enabled VF* %d\n", vf);
}
return 0;
}
static void mlx5_device_disable_sriov(struct mlx5_core_dev *dev)
{
struct mlx5_core_sriov *sriov = &dev->priv.sriov;
int err;
int vf;
if (!sriov->enabled_vfs)
return;
for (vf = 0; vf < sriov->num_vfs; vf++) {
if (!sriov->vfs_ctx[vf].enabled)
continue;
err = mlx5_core_disable_hca(dev, vf + 1);
if (err) {
mlx5_core_warn(dev, "failed to disable VF %d\n", vf);
continue;
}
sriov->vfs_ctx[vf].enabled = 0;
sriov->enabled_vfs--;
}
#ifdef CONFIG_MLX5_CORE_EN
mlx5_eswitch_disable_sriov(dev->priv.eswitch);
#endif
if (mlx5_wait_for_vf_pages(dev))
mlx5_core_warn(dev, "timeout reclaiming VFs pages\n");
}
static int mlx5_pci_enable_sriov(struct pci_dev *pdev, int num_vfs)
{
struct mlx5_core_dev *dev = pci_get_drvdata(pdev);
int err = 0;
if (pci_num_vf(pdev)) {
mlx5_core_warn(dev, "Unable to enable pci sriov, already enabled\n");
return -EBUSY;
}
err = pci_enable_sriov(pdev, num_vfs);
if (err)
mlx5_core_warn(dev, "pci_enable_sriov failed : %d\n", err);
return err;
}
static void mlx5_pci_disable_sriov(struct pci_dev *pdev)
{
pci_disable_sriov(pdev);
}
static int mlx5_sriov_enable(struct pci_dev *pdev, int num_vfs)
{
struct mlx5_core_dev *dev = pci_get_drvdata(pdev);
struct mlx5_core_sriov *sriov = &dev->priv.sriov;
int err = 0;
err = mlx5_device_enable_sriov(dev, num_vfs);
if (err) {
mlx5_core_warn(dev, "mlx5_device_enable_sriov failed : %d\n", err);
return err;
}
err = mlx5_pci_enable_sriov(pdev, num_vfs);
if (err) {
mlx5_core_warn(dev, "mlx5_pci_enable_sriov failed : %d\n", err);
mlx5_device_disable_sriov(dev);
return err;
}
sriov->num_vfs = num_vfs;
return 0;
}
static void mlx5_sriov_disable(struct pci_dev *pdev)
{
struct mlx5_core_dev *dev = pci_get_drvdata(pdev);
struct mlx5_core_sriov *sriov = &dev->priv.sriov;
mlx5_pci_disable_sriov(pdev);
mlx5_device_disable_sriov(dev);
sriov->num_vfs = 0;
}
int mlx5_core_sriov_configure(struct pci_dev *pdev, int num_vfs)
{
struct mlx5_core_dev *dev = pci_get_drvdata(pdev);
int err = 0;
mlx5_core_dbg(dev, "requested num_vfs %d\n", num_vfs);
if (!mlx5_core_is_pf(dev))
return -EPERM;
if (num_vfs && mlx5_lag_is_active(dev)) {
mlx5_core_warn(dev, "can't turn sriov on while LAG is active");
return -EINVAL;
}
if (num_vfs)
err = mlx5_sriov_enable(pdev, num_vfs);
else
mlx5_sriov_disable(pdev);
return err ? err : num_vfs;
}
int mlx5_sriov_attach(struct mlx5_core_dev *dev)
{
struct mlx5_core_sriov *sriov = &dev->priv.sriov;
if (!mlx5_core_is_pf(dev) || !sriov->num_vfs)
return 0;
/* If sriov VFs exist in PCI level, enable them in device level */
return mlx5_device_enable_sriov(dev, sriov->num_vfs);
}
void mlx5_sriov_detach(struct mlx5_core_dev *dev)
{
if (!mlx5_core_is_pf(dev))
return;
mlx5_device_disable_sriov(dev);
}
int mlx5_sriov_init(struct mlx5_core_dev *dev)
{
struct mlx5_core_sriov *sriov = &dev->priv.sriov;
struct pci_dev *pdev = dev->pdev;
int total_vfs;
if (!mlx5_core_is_pf(dev))
return 0;
total_vfs = pci_sriov_get_totalvfs(pdev);
sriov->num_vfs = pci_num_vf(pdev);
sriov->vfs_ctx = kcalloc(total_vfs, sizeof(*sriov->vfs_ctx), GFP_KERNEL);
if (!sriov->vfs_ctx)
return -ENOMEM;
return 0;
}
void mlx5_sriov_cleanup(struct mlx5_core_dev *dev)
{
struct mlx5_core_sriov *sriov = &dev->priv.sriov;
if (!mlx5_core_is_pf(dev))
return;
kfree(sriov->vfs_ctx);
}
|
