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"
40 static int sriov_restore_guids(struct mlx5_core_dev *dev, int vf)
42 struct mlx5_core_sriov *sriov = &dev->priv.sriov;
43 struct mlx5_hca_vport_context *in;
46 /* Restore sriov guid and policy settings */
47 if (sriov->vfs_ctx[vf].node_guid ||
48 sriov->vfs_ctx[vf].port_guid ||
49 sriov->vfs_ctx[vf].policy != MLX5_POLICY_INVALID) {
50 in = kzalloc(sizeof(*in), GFP_KERNEL);
54 in->node_guid = sriov->vfs_ctx[vf].node_guid;
55 in->port_guid = sriov->vfs_ctx[vf].port_guid;
56 in->policy = sriov->vfs_ctx[vf].policy;
58 !!(in->port_guid) * MLX5_HCA_VPORT_SEL_PORT_GUID |
59 !!(in->node_guid) * MLX5_HCA_VPORT_SEL_NODE_GUID |
60 !!(in->policy) * MLX5_HCA_VPORT_SEL_STATE_POLICY;
62 err = mlx5_core_modify_hca_vport_context(dev, 1, 1, vf + 1, in);
64 mlx5_core_warn(dev, "modify vport context failed, unable to restore VF %d settings\n", vf);
72 static int mlx5_device_enable_sriov(struct mlx5_core_dev *dev, int num_vfs)
74 struct mlx5_core_sriov *sriov = &dev->priv.sriov;
75 int err, vf, num_msix_count;
77 if (!MLX5_ESWITCH_MANAGER(dev))
80 err = mlx5_eswitch_enable(dev->priv.eswitch, num_vfs);
83 "failed to enable eswitch SRIOV (%d)\n", err);
88 num_msix_count = mlx5_get_default_msix_vec_count(dev, num_vfs);
89 for (vf = 0; vf < num_vfs; vf++) {
90 err = mlx5_core_enable_hca(dev, vf + 1);
92 mlx5_core_warn(dev, "failed to enable VF %d (%d)\n", vf, err);
96 err = mlx5_set_msix_vec_count(dev, vf + 1, num_msix_count);
99 "failed to set MSI-X vector counts VF %d, err %d\n",
104 sriov->vfs_ctx[vf].enabled = 1;
105 if (MLX5_CAP_GEN(dev, port_type) == MLX5_CAP_PORT_TYPE_IB) {
106 err = sriov_restore_guids(dev, vf);
109 "failed to restore VF %d settings, err %d\n",
114 mlx5_core_dbg(dev, "successfully enabled VF* %d\n", vf);
121 mlx5_device_disable_sriov(struct mlx5_core_dev *dev, int num_vfs, bool clear_vf)
123 struct mlx5_core_sriov *sriov = &dev->priv.sriov;
127 for (vf = num_vfs - 1; vf >= 0; vf--) {
128 if (!sriov->vfs_ctx[vf].enabled)
130 err = mlx5_core_disable_hca(dev, vf + 1);
132 mlx5_core_warn(dev, "failed to disable VF %d\n", vf);
135 sriov->vfs_ctx[vf].enabled = 0;
138 if (MLX5_ESWITCH_MANAGER(dev))
139 mlx5_eswitch_disable(dev->priv.eswitch, clear_vf);
141 if (mlx5_wait_for_pages(dev, &dev->priv.vfs_pages))
142 mlx5_core_warn(dev, "timeout reclaiming VFs pages\n");
145 static int mlx5_sriov_enable(struct pci_dev *pdev, int num_vfs)
147 struct mlx5_core_dev *dev = pci_get_drvdata(pdev);
150 err = mlx5_device_enable_sriov(dev, num_vfs);
152 mlx5_core_warn(dev, "mlx5_device_enable_sriov failed : %d\n", err);
156 err = pci_enable_sriov(pdev, num_vfs);
158 mlx5_core_warn(dev, "pci_enable_sriov failed : %d\n", err);
159 mlx5_device_disable_sriov(dev, num_vfs, true);
164 static void mlx5_sriov_disable(struct pci_dev *pdev)
166 struct mlx5_core_dev *dev = pci_get_drvdata(pdev);
167 int num_vfs = pci_num_vf(dev->pdev);
169 pci_disable_sriov(pdev);
170 mlx5_device_disable_sriov(dev, num_vfs, true);
173 int mlx5_core_sriov_configure(struct pci_dev *pdev, int num_vfs)
175 struct mlx5_core_dev *dev = pci_get_drvdata(pdev);
176 struct mlx5_core_sriov *sriov = &dev->priv.sriov;
179 mlx5_core_dbg(dev, "requested num_vfs %d\n", num_vfs);
182 err = mlx5_sriov_enable(pdev, num_vfs);
184 mlx5_sriov_disable(pdev);
187 sriov->num_vfs = num_vfs;
188 return err ? err : num_vfs;
191 int mlx5_core_sriov_set_msix_vec_count(struct pci_dev *vf, int msix_vec_count)
193 struct pci_dev *pf = pci_physfn(vf);
194 struct mlx5_core_sriov *sriov;
195 struct mlx5_core_dev *dev;
198 dev = pci_get_drvdata(pf);
199 num_vf_msix = MLX5_CAP_GEN_MAX(dev, num_total_dynamic_vf_msix);
205 mlx5_get_default_msix_vec_count(dev, pci_num_vf(pf));
207 sriov = &dev->priv.sriov;
209 /* Reversed translation of PCI VF function number to the internal
210 * function_id, which exists in the name of virtfn symlink.
212 for (id = 0; id < pci_num_vf(pf); id++) {
213 if (!sriov->vfs_ctx[id].enabled)
216 if (vf->devfn == pci_iov_virtfn_devfn(pf, id))
220 if (id == pci_num_vf(pf) || !sriov->vfs_ctx[id].enabled)
223 return mlx5_set_msix_vec_count(dev, id + 1, msix_vec_count);
226 int mlx5_sriov_attach(struct mlx5_core_dev *dev)
228 if (!mlx5_core_is_pf(dev) || !pci_num_vf(dev->pdev))
231 /* If sriov VFs exist in PCI level, enable them in device level */
232 return mlx5_device_enable_sriov(dev, pci_num_vf(dev->pdev));
235 void mlx5_sriov_detach(struct mlx5_core_dev *dev)
237 if (!mlx5_core_is_pf(dev))
240 mlx5_device_disable_sriov(dev, pci_num_vf(dev->pdev), false);
243 static u16 mlx5_get_max_vfs(struct mlx5_core_dev *dev)
248 if (mlx5_core_is_ecpf_esw_manager(dev)) {
249 out = mlx5_esw_query_functions(dev);
251 /* Old FW doesn't support getting total_vfs from esw func
252 * but supports getting it from pci_sriov.
256 host_total_vfs = MLX5_GET(query_esw_functions_out, out,
257 host_params_context.host_total_vfs);
260 return host_total_vfs;
264 return pci_sriov_get_totalvfs(dev->pdev);
267 int mlx5_sriov_init(struct mlx5_core_dev *dev)
269 struct mlx5_core_sriov *sriov = &dev->priv.sriov;
270 struct pci_dev *pdev = dev->pdev;
273 if (!mlx5_core_is_pf(dev))
276 total_vfs = pci_sriov_get_totalvfs(pdev);
277 sriov->max_vfs = mlx5_get_max_vfs(dev);
278 sriov->num_vfs = pci_num_vf(pdev);
279 sriov->vfs_ctx = kcalloc(total_vfs, sizeof(*sriov->vfs_ctx), GFP_KERNEL);
286 void mlx5_sriov_cleanup(struct mlx5_core_dev *dev)
288 struct mlx5_core_sriov *sriov = &dev->priv.sriov;
290 if (!mlx5_core_is_pf(dev))
293 kfree(sriov->vfs_ctx);