2 * Copyright (c) 2014, Mellanox Technologies inc. All rights reserved.
4 * This software is available to you under a choice of one of two
5 * licenses. You may choose to be licensed under the terms of the GNU
6 * General Public License (GPL) Version 2, available from the file
7 * COPYING in the main directory of this source tree, or the
8 * OpenIB.org BSD license below:
10 * Redistribution and use in source and binary forms, with or
11 * without modification, are permitted provided that the following
14 * - Redistributions of source code must retain the above
15 * copyright notice, this list of conditions and the following
18 * - Redistributions in binary form must reproduce the above
19 * copyright notice, this list of conditions and the following
20 * disclaimer in the documentation and/or other materials
21 * provided with the distribution.
23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
33 #include <linux/pci.h>
34 #include <linux/mlx5/driver.h>
35 #include "mlx5_core.h"
36 #ifdef CONFIG_MLX5_CORE_EN
40 static void enable_vfs(struct mlx5_core_dev
*dev
, int num_vfs
)
42 struct mlx5_core_sriov
*sriov
= &dev
->priv
.sriov
;
46 for (vf
= 1; vf
<= num_vfs
; vf
++) {
47 err
= mlx5_core_enable_hca(dev
, vf
);
49 mlx5_core_warn(dev
, "failed to enable VF %d\n", vf
- 1);
51 sriov
->vfs_ctx
[vf
- 1].enabled
= 1;
52 mlx5_core_dbg(dev
, "successfully enabled VF %d\n", vf
- 1);
57 static void disable_vfs(struct mlx5_core_dev
*dev
, int num_vfs
)
59 struct mlx5_core_sriov
*sriov
= &dev
->priv
.sriov
;
62 for (vf
= 1; vf
<= num_vfs
; vf
++) {
63 if (sriov
->vfs_ctx
[vf
- 1].enabled
) {
64 if (mlx5_core_disable_hca(dev
, vf
))
65 mlx5_core_warn(dev
, "failed to disable VF %d\n", vf
- 1);
67 sriov
->vfs_ctx
[vf
- 1].enabled
= 0;
72 static int mlx5_core_create_vfs(struct pci_dev
*pdev
, int num_vfs
)
74 struct mlx5_core_dev
*dev
= pci_get_drvdata(pdev
);
78 pci_disable_sriov(pdev
);
80 enable_vfs(dev
, num_vfs
);
82 err
= pci_enable_sriov(pdev
, num_vfs
);
84 dev_warn(&pdev
->dev
, "enable sriov failed %d\n", err
);
91 disable_vfs(dev
, num_vfs
);
95 static int mlx5_core_sriov_enable(struct pci_dev
*pdev
, int num_vfs
)
97 struct mlx5_core_dev
*dev
= pci_get_drvdata(pdev
);
98 struct mlx5_core_sriov
*sriov
= &dev
->priv
.sriov
;
101 kfree(sriov
->vfs_ctx
);
102 sriov
->vfs_ctx
= kcalloc(num_vfs
, sizeof(*sriov
->vfs_ctx
), GFP_ATOMIC
);
106 sriov
->enabled_vfs
= num_vfs
;
107 err
= mlx5_core_create_vfs(pdev
, num_vfs
);
109 kfree(sriov
->vfs_ctx
);
110 sriov
->vfs_ctx
= NULL
;
117 static void mlx5_core_init_vfs(struct mlx5_core_dev
*dev
, int num_vfs
)
119 struct mlx5_core_sriov
*sriov
= &dev
->priv
.sriov
;
121 sriov
->num_vfs
= num_vfs
;
124 static void mlx5_core_cleanup_vfs(struct mlx5_core_dev
*dev
)
126 struct mlx5_core_sriov
*sriov
;
128 sriov
= &dev
->priv
.sriov
;
129 disable_vfs(dev
, sriov
->num_vfs
);
131 if (mlx5_wait_for_vf_pages(dev
))
132 mlx5_core_warn(dev
, "timeout claiming VFs pages\n");
137 int mlx5_core_sriov_configure(struct pci_dev
*pdev
, int num_vfs
)
139 struct mlx5_core_dev
*dev
= pci_get_drvdata(pdev
);
140 struct mlx5_core_sriov
*sriov
= &dev
->priv
.sriov
;
143 mlx5_core_dbg(dev
, "requsted num_vfs %d\n", num_vfs
);
144 if (!mlx5_core_is_pf(dev
))
147 mlx5_core_cleanup_vfs(dev
);
150 #ifdef CONFIG_MLX5_CORE_EN
151 mlx5_eswitch_disable_sriov(dev
->priv
.eswitch
);
153 kfree(sriov
->vfs_ctx
);
154 sriov
->vfs_ctx
= NULL
;
155 if (!pci_vfs_assigned(pdev
))
156 pci_disable_sriov(pdev
);
158 pr_info("unloading PF driver while leaving orphan VFs\n");
162 err
= mlx5_core_sriov_enable(pdev
, num_vfs
);
164 dev_warn(&pdev
->dev
, "mlx5_core_sriov_enable failed %d\n", err
);
168 mlx5_core_init_vfs(dev
, num_vfs
);
169 #ifdef CONFIG_MLX5_CORE_EN
170 mlx5_eswitch_enable_sriov(dev
->priv
.eswitch
, num_vfs
);
176 static int sync_required(struct pci_dev
*pdev
)
178 struct mlx5_core_dev
*dev
= pci_get_drvdata(pdev
);
179 struct mlx5_core_sriov
*sriov
= &dev
->priv
.sriov
;
180 int cur_vfs
= pci_num_vf(pdev
);
182 if (cur_vfs
!= sriov
->num_vfs
) {
183 pr_info("current VFs %d, registered %d - sync needed\n", cur_vfs
, sriov
->num_vfs
);
190 int mlx5_sriov_init(struct mlx5_core_dev
*dev
)
192 struct mlx5_core_sriov
*sriov
= &dev
->priv
.sriov
;
193 struct pci_dev
*pdev
= dev
->pdev
;
196 if (!mlx5_core_is_pf(dev
))
199 if (!sync_required(dev
->pdev
))
202 cur_vfs
= pci_num_vf(pdev
);
203 sriov
->vfs_ctx
= kcalloc(cur_vfs
, sizeof(*sriov
->vfs_ctx
), GFP_KERNEL
);
207 sriov
->enabled_vfs
= cur_vfs
;
209 mlx5_core_init_vfs(dev
, cur_vfs
);
210 #ifdef CONFIG_MLX5_CORE_EN
212 mlx5_eswitch_enable_sriov(dev
->priv
.eswitch
, cur_vfs
);
215 enable_vfs(dev
, cur_vfs
);
220 int mlx5_sriov_cleanup(struct mlx5_core_dev
*dev
)
222 struct pci_dev
*pdev
= dev
->pdev
;
225 if (!mlx5_core_is_pf(dev
))
228 err
= mlx5_core_sriov_configure(pdev
, 0);
This page took 0.037155 seconds and 6 git commands to generate.