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:
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11 * without modification, are permitted provided that the following
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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
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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
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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, "requested 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);