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
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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"
38 bool mlx5_sriov_is_enabled(struct mlx5_core_dev *dev)
40 struct mlx5_core_sriov *sriov = &dev->priv.sriov;
42 return !!sriov->num_vfs;
45 static int mlx5_device_enable_sriov(struct mlx5_core_dev *dev, int num_vfs)
47 struct mlx5_core_sriov *sriov = &dev->priv.sriov;
51 if (sriov->enabled_vfs) {
53 "failed to enable SRIOV on device, already enabled with %d vfs\n",
58 err = mlx5_eswitch_enable_sriov(dev->priv.eswitch, num_vfs, SRIOV_LEGACY);
61 "failed to enable eswitch SRIOV (%d)\n", err);
65 for (vf = 0; vf < num_vfs; vf++) {
66 err = mlx5_core_enable_hca(dev, vf + 1);
68 mlx5_core_warn(dev, "failed to enable VF %d (%d)\n", vf, err);
71 sriov->vfs_ctx[vf].enabled = 1;
73 mlx5_core_dbg(dev, "successfully enabled VF* %d\n", vf);
80 static void mlx5_device_disable_sriov(struct mlx5_core_dev *dev)
82 struct mlx5_core_sriov *sriov = &dev->priv.sriov;
86 if (!sriov->enabled_vfs)
89 for (vf = 0; vf < sriov->num_vfs; vf++) {
90 if (!sriov->vfs_ctx[vf].enabled)
92 err = mlx5_core_disable_hca(dev, vf + 1);
94 mlx5_core_warn(dev, "failed to disable VF %d\n", vf);
97 sriov->vfs_ctx[vf].enabled = 0;
102 mlx5_eswitch_disable_sriov(dev->priv.eswitch);
104 if (mlx5_wait_for_vf_pages(dev))
105 mlx5_core_warn(dev, "timeout reclaiming VFs pages\n");
108 static int mlx5_pci_enable_sriov(struct pci_dev *pdev, int num_vfs)
110 struct mlx5_core_dev *dev = pci_get_drvdata(pdev);
113 if (pci_num_vf(pdev)) {
114 mlx5_core_warn(dev, "Unable to enable pci sriov, already enabled\n");
118 err = pci_enable_sriov(pdev, num_vfs);
120 mlx5_core_warn(dev, "pci_enable_sriov failed : %d\n", err);
125 static void mlx5_pci_disable_sriov(struct pci_dev *pdev)
127 pci_disable_sriov(pdev);
130 static int mlx5_sriov_enable(struct pci_dev *pdev, int num_vfs)
132 struct mlx5_core_dev *dev = pci_get_drvdata(pdev);
133 struct mlx5_core_sriov *sriov = &dev->priv.sriov;
136 err = mlx5_device_enable_sriov(dev, num_vfs);
138 mlx5_core_warn(dev, "mlx5_device_enable_sriov failed : %d\n", err);
142 err = mlx5_pci_enable_sriov(pdev, num_vfs);
144 mlx5_core_warn(dev, "mlx5_pci_enable_sriov failed : %d\n", err);
145 mlx5_device_disable_sriov(dev);
149 sriov->num_vfs = num_vfs;
154 static void mlx5_sriov_disable(struct pci_dev *pdev)
156 struct mlx5_core_dev *dev = pci_get_drvdata(pdev);
157 struct mlx5_core_sriov *sriov = &dev->priv.sriov;
159 mlx5_pci_disable_sriov(pdev);
160 mlx5_device_disable_sriov(dev);
164 int mlx5_core_sriov_configure(struct pci_dev *pdev, int num_vfs)
166 struct mlx5_core_dev *dev = pci_get_drvdata(pdev);
169 mlx5_core_dbg(dev, "requested num_vfs %d\n", num_vfs);
170 if (!mlx5_core_is_pf(dev))
176 ret = mlx5_lag_forbid(dev);
177 if (ret && (ret != -ENODEV))
182 err = mlx5_sriov_enable(pdev, num_vfs);
184 mlx5_sriov_disable(pdev);
188 return err ? err : num_vfs;
191 int mlx5_sriov_attach(struct mlx5_core_dev *dev)
193 struct mlx5_core_sriov *sriov = &dev->priv.sriov;
195 if (!mlx5_core_is_pf(dev) || !sriov->num_vfs)
198 /* If sriov VFs exist in PCI level, enable them in device level */
199 return mlx5_device_enable_sriov(dev, sriov->num_vfs);
202 void mlx5_sriov_detach(struct mlx5_core_dev *dev)
204 if (!mlx5_core_is_pf(dev))
207 mlx5_device_disable_sriov(dev);
210 int mlx5_sriov_init(struct mlx5_core_dev *dev)
212 struct mlx5_core_sriov *sriov = &dev->priv.sriov;
213 struct pci_dev *pdev = dev->pdev;
216 if (!mlx5_core_is_pf(dev))
219 total_vfs = pci_sriov_get_totalvfs(pdev);
220 sriov->num_vfs = pci_num_vf(pdev);
221 sriov->vfs_ctx = kcalloc(total_vfs, sizeof(*sriov->vfs_ctx), GFP_KERNEL);
228 void mlx5_sriov_cleanup(struct mlx5_core_dev *dev)
230 struct mlx5_core_sriov *sriov = &dev->priv.sriov;
232 if (!mlx5_core_is_pf(dev))
235 kfree(sriov->vfs_ctx);