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
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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
25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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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 int mlx5_device_enable_sriov(struct mlx5_core_dev *dev, int num_vfs)
49 struct mlx5_core_sriov *sriov = &dev->priv.sriov;
53 if (sriov->enabled_vfs) {
55 "failed to enable SRIOV on device, already enabled with %d vfs\n",
60 #ifdef CONFIG_MLX5_CORE_EN
61 err = mlx5_eswitch_enable_sriov(dev->priv.eswitch, num_vfs, SRIOV_LEGACY);
64 "failed to enable eswitch SRIOV (%d)\n", err);
69 for (vf = 0; vf < num_vfs; vf++) {
70 err = mlx5_core_enable_hca(dev, vf + 1);
72 mlx5_core_warn(dev, "failed to enable VF %d (%d)\n", vf, err);
75 sriov->vfs_ctx[vf].enabled = 1;
77 mlx5_core_dbg(dev, "successfully enabled VF* %d\n", vf);
84 static void mlx5_device_disable_sriov(struct mlx5_core_dev *dev)
86 struct mlx5_core_sriov *sriov = &dev->priv.sriov;
90 if (!sriov->enabled_vfs)
91 #ifdef CONFIG_MLX5_CORE_EN
92 goto disable_sriov_resources;
97 for (vf = 0; vf < sriov->num_vfs; vf++) {
98 if (!sriov->vfs_ctx[vf].enabled)
100 err = mlx5_core_disable_hca(dev, vf + 1);
102 mlx5_core_warn(dev, "failed to disable VF %d\n", vf);
105 sriov->vfs_ctx[vf].enabled = 0;
106 sriov->enabled_vfs--;
109 #ifdef CONFIG_MLX5_CORE_EN
110 disable_sriov_resources:
111 mlx5_eswitch_disable_sriov(dev->priv.eswitch);
114 if (mlx5_wait_for_vf_pages(dev))
115 mlx5_core_warn(dev, "timeout reclaiming VFs pages\n");
118 static int mlx5_pci_enable_sriov(struct pci_dev *pdev, int num_vfs)
120 struct mlx5_core_dev *dev = pci_get_drvdata(pdev);
123 if (pci_num_vf(pdev)) {
124 mlx5_core_warn(dev, "Unable to enable pci sriov, already enabled\n");
128 err = pci_enable_sriov(pdev, num_vfs);
130 mlx5_core_warn(dev, "pci_enable_sriov failed : %d\n", err);
135 static void mlx5_pci_disable_sriov(struct pci_dev *pdev)
137 pci_disable_sriov(pdev);
140 static int mlx5_sriov_enable(struct pci_dev *pdev, int num_vfs)
142 struct mlx5_core_dev *dev = pci_get_drvdata(pdev);
143 struct mlx5_core_sriov *sriov = &dev->priv.sriov;
146 err = mlx5_device_enable_sriov(dev, num_vfs);
148 mlx5_core_warn(dev, "mlx5_device_enable_sriov failed : %d\n", err);
152 err = mlx5_pci_enable_sriov(pdev, num_vfs);
154 mlx5_core_warn(dev, "mlx5_pci_enable_sriov failed : %d\n", err);
155 mlx5_device_disable_sriov(dev);
159 sriov->num_vfs = num_vfs;
164 static void mlx5_sriov_disable(struct pci_dev *pdev)
166 struct mlx5_core_dev *dev = pci_get_drvdata(pdev);
167 struct mlx5_core_sriov *sriov = &dev->priv.sriov;
169 mlx5_pci_disable_sriov(pdev);
170 mlx5_device_disable_sriov(dev);
174 int mlx5_core_sriov_configure(struct pci_dev *pdev, int num_vfs)
176 struct mlx5_core_dev *dev = pci_get_drvdata(pdev);
179 mlx5_core_dbg(dev, "requested num_vfs %d\n", num_vfs);
180 if (!mlx5_core_is_pf(dev))
186 ret = mlx5_lag_forbid(dev);
187 if (ret && (ret != -ENODEV))
192 err = mlx5_sriov_enable(pdev, num_vfs);
194 mlx5_sriov_disable(pdev);
198 return err ? err : num_vfs;
201 int mlx5_sriov_attach(struct mlx5_core_dev *dev)
203 struct mlx5_core_sriov *sriov = &dev->priv.sriov;
205 if (!mlx5_core_is_pf(dev) || !sriov->num_vfs)
208 /* If sriov VFs exist in PCI level, enable them in device level */
209 return mlx5_device_enable_sriov(dev, sriov->num_vfs);
212 void mlx5_sriov_detach(struct mlx5_core_dev *dev)
214 if (!mlx5_core_is_pf(dev))
217 mlx5_device_disable_sriov(dev);
220 int mlx5_sriov_init(struct mlx5_core_dev *dev)
222 struct mlx5_core_sriov *sriov = &dev->priv.sriov;
223 struct pci_dev *pdev = dev->pdev;
226 if (!mlx5_core_is_pf(dev))
229 total_vfs = pci_sriov_get_totalvfs(pdev);
230 sriov->num_vfs = pci_num_vf(pdev);
231 sriov->vfs_ctx = kcalloc(total_vfs, sizeof(*sriov->vfs_ctx), GFP_KERNEL);
238 void mlx5_sriov_cleanup(struct mlx5_core_dev *dev)
240 struct mlx5_core_sriov *sriov = &dev->priv.sriov;
242 if (!mlx5_core_is_pf(dev))
245 kfree(sriov->vfs_ctx);