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 <linux/mlx5/vport.h>
36 #include "mlx5_core.h"
39 bool mlx5_sriov_is_enabled(struct mlx5_core_dev *dev)
41 struct mlx5_core_sriov *sriov = &dev->priv.sriov;
43 return !!sriov->num_vfs;
46 static int sriov_restore_guids(struct mlx5_core_dev *dev, int vf)
48 struct mlx5_core_sriov *sriov = &dev->priv.sriov;
49 struct mlx5_hca_vport_context *in;
52 /* Restore sriov guid and policy settings */
53 if (sriov->vfs_ctx[vf].node_guid ||
54 sriov->vfs_ctx[vf].port_guid ||
55 sriov->vfs_ctx[vf].policy != MLX5_POLICY_INVALID) {
56 in = kzalloc(sizeof(*in), GFP_KERNEL);
60 in->node_guid = sriov->vfs_ctx[vf].node_guid;
61 in->port_guid = sriov->vfs_ctx[vf].port_guid;
62 in->policy = sriov->vfs_ctx[vf].policy;
64 !!(in->port_guid) * MLX5_HCA_VPORT_SEL_PORT_GUID |
65 !!(in->node_guid) * MLX5_HCA_VPORT_SEL_NODE_GUID |
66 !!(in->policy) * MLX5_HCA_VPORT_SEL_STATE_POLICY;
68 err = mlx5_core_modify_hca_vport_context(dev, 1, 1, vf + 1, in);
70 mlx5_core_warn(dev, "modify vport context failed, unable to restore VF %d settings\n", vf);
78 static int mlx5_device_enable_sriov(struct mlx5_core_dev *dev, int num_vfs)
80 struct mlx5_core_sriov *sriov = &dev->priv.sriov;
84 if (sriov->enabled_vfs) {
86 "failed to enable SRIOV on device, already enabled with %d vfs\n",
91 if (!MLX5_ESWITCH_MANAGER(dev))
94 err = mlx5_eswitch_enable_sriov(dev->priv.eswitch, num_vfs, SRIOV_LEGACY);
97 "failed to enable eswitch SRIOV (%d)\n", err);
102 for (vf = 0; vf < num_vfs; vf++) {
103 err = mlx5_core_enable_hca(dev, vf + 1);
105 mlx5_core_warn(dev, "failed to enable VF %d (%d)\n", vf, err);
108 sriov->vfs_ctx[vf].enabled = 1;
109 sriov->enabled_vfs++;
110 if (MLX5_CAP_GEN(dev, port_type) == MLX5_CAP_PORT_TYPE_IB) {
111 err = sriov_restore_guids(dev, vf);
114 "failed to restore VF %d settings, err %d\n",
119 mlx5_core_dbg(dev, "successfully enabled VF* %d\n", vf);
125 static void mlx5_device_disable_sriov(struct mlx5_core_dev *dev)
127 struct mlx5_core_sriov *sriov = &dev->priv.sriov;
131 if (!sriov->enabled_vfs)
134 for (vf = 0; vf < sriov->num_vfs; vf++) {
135 if (!sriov->vfs_ctx[vf].enabled)
137 err = mlx5_core_disable_hca(dev, vf + 1);
139 mlx5_core_warn(dev, "failed to disable VF %d\n", vf);
142 sriov->vfs_ctx[vf].enabled = 0;
143 sriov->enabled_vfs--;
147 if (MLX5_ESWITCH_MANAGER(dev))
148 mlx5_eswitch_disable_sriov(dev->priv.eswitch);
150 if (mlx5_wait_for_vf_pages(dev))
151 mlx5_core_warn(dev, "timeout reclaiming VFs pages\n");
154 static int mlx5_pci_enable_sriov(struct pci_dev *pdev, int num_vfs)
156 struct mlx5_core_dev *dev = pci_get_drvdata(pdev);
159 if (pci_num_vf(pdev)) {
160 mlx5_core_warn(dev, "Unable to enable pci sriov, already enabled\n");
164 err = pci_enable_sriov(pdev, num_vfs);
166 mlx5_core_warn(dev, "pci_enable_sriov failed : %d\n", err);
171 static void mlx5_pci_disable_sriov(struct pci_dev *pdev)
173 pci_disable_sriov(pdev);
176 static int mlx5_sriov_enable(struct pci_dev *pdev, int num_vfs)
178 struct mlx5_core_dev *dev = pci_get_drvdata(pdev);
179 struct mlx5_core_sriov *sriov = &dev->priv.sriov;
182 err = mlx5_device_enable_sriov(dev, num_vfs);
184 mlx5_core_warn(dev, "mlx5_device_enable_sriov failed : %d\n", err);
188 err = mlx5_pci_enable_sriov(pdev, num_vfs);
190 mlx5_core_warn(dev, "mlx5_pci_enable_sriov failed : %d\n", err);
191 mlx5_device_disable_sriov(dev);
195 sriov->num_vfs = num_vfs;
200 static void mlx5_sriov_disable(struct pci_dev *pdev)
202 struct mlx5_core_dev *dev = pci_get_drvdata(pdev);
203 struct mlx5_core_sriov *sriov = &dev->priv.sriov;
205 mlx5_pci_disable_sriov(pdev);
206 mlx5_device_disable_sriov(dev);
210 int mlx5_core_sriov_configure(struct pci_dev *pdev, int num_vfs)
212 struct mlx5_core_dev *dev = pci_get_drvdata(pdev);
215 mlx5_core_dbg(dev, "requested num_vfs %d\n", num_vfs);
216 if (!mlx5_core_is_pf(dev))
222 ret = mlx5_lag_forbid(dev);
223 if (ret && (ret != -ENODEV))
228 err = mlx5_sriov_enable(pdev, num_vfs);
230 mlx5_sriov_disable(pdev);
234 return err ? err : num_vfs;
237 int mlx5_sriov_attach(struct mlx5_core_dev *dev)
239 struct mlx5_core_sriov *sriov = &dev->priv.sriov;
241 if (!mlx5_core_is_pf(dev) || !sriov->num_vfs)
244 /* If sriov VFs exist in PCI level, enable them in device level */
245 return mlx5_device_enable_sriov(dev, sriov->num_vfs);
248 void mlx5_sriov_detach(struct mlx5_core_dev *dev)
250 if (!mlx5_core_is_pf(dev))
253 mlx5_device_disable_sriov(dev);
256 int mlx5_sriov_init(struct mlx5_core_dev *dev)
258 struct mlx5_core_sriov *sriov = &dev->priv.sriov;
259 struct pci_dev *pdev = dev->pdev;
262 if (!mlx5_core_is_pf(dev))
265 total_vfs = pci_sriov_get_totalvfs(pdev);
266 sriov->num_vfs = pci_num_vf(pdev);
267 sriov->vfs_ctx = kcalloc(total_vfs, sizeof(*sriov->vfs_ctx), GFP_KERNEL);
274 void mlx5_sriov_cleanup(struct mlx5_core_dev *dev)
276 struct mlx5_core_sriov *sriov = &dev->priv.sriov;
278 if (!mlx5_core_is_pf(dev))
281 kfree(sriov->vfs_ctx);