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 bool mlx5_sriov_is_enabled(struct mlx5_core_dev *dev)
42 struct mlx5_core_sriov *sriov = &dev->priv.sriov;
44 return !!sriov->num_vfs;
47 static void enable_vfs(struct mlx5_core_dev *dev, int num_vfs)
49 struct mlx5_core_sriov *sriov = &dev->priv.sriov;
53 for (vf = 1; vf <= num_vfs; vf++) {
54 err = mlx5_core_enable_hca(dev, vf);
56 mlx5_core_warn(dev, "failed to enable VF %d\n", vf - 1);
58 sriov->vfs_ctx[vf - 1].enabled = 1;
59 mlx5_core_dbg(dev, "successfully enabled VF %d\n", vf - 1);
64 static void disable_vfs(struct mlx5_core_dev *dev, int num_vfs)
66 struct mlx5_core_sriov *sriov = &dev->priv.sriov;
69 for (vf = 1; vf <= num_vfs; vf++) {
70 if (sriov->vfs_ctx[vf - 1].enabled) {
71 if (mlx5_core_disable_hca(dev, vf))
72 mlx5_core_warn(dev, "failed to disable VF %d\n", vf - 1);
74 sriov->vfs_ctx[vf - 1].enabled = 0;
79 static int mlx5_core_create_vfs(struct pci_dev *pdev, int num_vfs)
81 struct mlx5_core_dev *dev = pci_get_drvdata(pdev);
85 pci_disable_sriov(pdev);
87 enable_vfs(dev, num_vfs);
89 err = pci_enable_sriov(pdev, num_vfs);
91 dev_warn(&pdev->dev, "enable sriov failed %d\n", err);
98 disable_vfs(dev, num_vfs);
102 static int mlx5_core_sriov_enable(struct pci_dev *pdev, int num_vfs)
104 struct mlx5_core_dev *dev = pci_get_drvdata(pdev);
105 struct mlx5_core_sriov *sriov = &dev->priv.sriov;
108 kfree(sriov->vfs_ctx);
109 sriov->vfs_ctx = kcalloc(num_vfs, sizeof(*sriov->vfs_ctx), GFP_ATOMIC);
113 sriov->enabled_vfs = num_vfs;
114 err = mlx5_core_create_vfs(pdev, num_vfs);
116 kfree(sriov->vfs_ctx);
117 sriov->vfs_ctx = NULL;
124 static void mlx5_core_init_vfs(struct mlx5_core_dev *dev, int num_vfs)
126 struct mlx5_core_sriov *sriov = &dev->priv.sriov;
128 sriov->num_vfs = num_vfs;
131 static void mlx5_core_cleanup_vfs(struct mlx5_core_dev *dev)
133 struct mlx5_core_sriov *sriov;
135 sriov = &dev->priv.sriov;
136 disable_vfs(dev, sriov->num_vfs);
138 if (mlx5_wait_for_vf_pages(dev))
139 mlx5_core_warn(dev, "timeout claiming VFs pages\n");
144 int mlx5_core_sriov_configure(struct pci_dev *pdev, int num_vfs)
146 struct mlx5_core_dev *dev = pci_get_drvdata(pdev);
147 struct mlx5_core_sriov *sriov = &dev->priv.sriov;
150 mlx5_core_dbg(dev, "requested num_vfs %d\n", num_vfs);
151 if (!mlx5_core_is_pf(dev))
154 if (num_vfs && mlx5_lag_is_active(dev)) {
155 mlx5_core_warn(dev, "can't turn sriov on while LAG is active");
159 mlx5_core_cleanup_vfs(dev);
162 #ifdef CONFIG_MLX5_CORE_EN
163 mlx5_eswitch_disable_sriov(dev->priv.eswitch);
165 kfree(sriov->vfs_ctx);
166 sriov->vfs_ctx = NULL;
167 if (!pci_vfs_assigned(pdev))
168 pci_disable_sriov(pdev);
170 mlx5_core_info(dev, "unloading PF driver while leaving orphan VFs\n");
174 err = mlx5_core_sriov_enable(pdev, num_vfs);
176 mlx5_core_warn(dev, "mlx5_core_sriov_enable failed %d\n", err);
180 mlx5_core_init_vfs(dev, num_vfs);
181 #ifdef CONFIG_MLX5_CORE_EN
182 mlx5_eswitch_enable_sriov(dev->priv.eswitch, num_vfs, SRIOV_LEGACY);
188 static int sync_required(struct pci_dev *pdev)
190 struct mlx5_core_dev *dev = pci_get_drvdata(pdev);
191 struct mlx5_core_sriov *sriov = &dev->priv.sriov;
192 int cur_vfs = pci_num_vf(pdev);
194 if (cur_vfs != sriov->num_vfs) {
195 mlx5_core_warn(dev, "current VFs %d, registered %d - sync needed\n",
196 cur_vfs, sriov->num_vfs);
203 int mlx5_sriov_init(struct mlx5_core_dev *dev)
205 struct mlx5_core_sriov *sriov = &dev->priv.sriov;
206 struct pci_dev *pdev = dev->pdev;
209 if (!mlx5_core_is_pf(dev))
212 if (!sync_required(dev->pdev))
215 cur_vfs = pci_num_vf(pdev);
216 sriov->vfs_ctx = kcalloc(cur_vfs, sizeof(*sriov->vfs_ctx), GFP_KERNEL);
220 sriov->enabled_vfs = cur_vfs;
222 mlx5_core_init_vfs(dev, cur_vfs);
223 #ifdef CONFIG_MLX5_CORE_EN
225 mlx5_eswitch_enable_sriov(dev->priv.eswitch, cur_vfs,
229 enable_vfs(dev, cur_vfs);
234 int mlx5_sriov_cleanup(struct mlx5_core_dev *dev)
236 struct pci_dev *pdev = dev->pdev;
239 if (!mlx5_core_is_pf(dev))
242 err = mlx5_core_sriov_configure(pdev, 0);