Eli Cohen | fc50db9 | 2015-12-01 18:03:09 +0200 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2014, Mellanox Technologies inc. All rights reserved. |
| 3 | * |
| 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: |
| 9 | * |
| 10 | * Redistribution and use in source and binary forms, with or |
| 11 | * without modification, are permitted provided that the following |
| 12 | * conditions are met: |
| 13 | * |
| 14 | * - Redistributions of source code must retain the above |
| 15 | * copyright notice, this list of conditions and the following |
| 16 | * disclaimer. |
| 17 | * |
| 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. |
| 22 | * |
| 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 |
| 30 | * SOFTWARE. |
| 31 | */ |
| 32 | |
| 33 | #include <linux/pci.h> |
| 34 | #include <linux/mlx5/driver.h> |
| 35 | #include "mlx5_core.h" |
Saeed Mahameed | 8184873 | 2015-12-01 18:03:20 +0200 | [diff] [blame] | 36 | #ifdef CONFIG_MLX5_CORE_EN |
| 37 | #include "eswitch.h" |
| 38 | #endif |
Eli Cohen | fc50db9 | 2015-12-01 18:03:09 +0200 | [diff] [blame] | 39 | |
Aviv Heller | edb31b1 | 2016-04-17 19:32:13 +0300 | [diff] [blame] | 40 | bool mlx5_sriov_is_enabled(struct mlx5_core_dev *dev) |
| 41 | { |
| 42 | struct mlx5_core_sriov *sriov = &dev->priv.sriov; |
| 43 | |
| 44 | return !!sriov->num_vfs; |
| 45 | } |
| 46 | |
Mohamad Haj Yahia | 6b6adee | 2016-09-09 17:35:18 +0300 | [diff] [blame] | 47 | static int mlx5_device_enable_sriov(struct mlx5_core_dev *dev, int num_vfs) |
Eli Cohen | fc50db9 | 2015-12-01 18:03:09 +0200 | [diff] [blame] | 48 | { |
| 49 | struct mlx5_core_sriov *sriov = &dev->priv.sriov; |
| 50 | int err; |
| 51 | int vf; |
| 52 | |
Mohamad Haj Yahia | 6b6adee | 2016-09-09 17:35:18 +0300 | [diff] [blame] | 53 | if (sriov->enabled_vfs) { |
| 54 | mlx5_core_warn(dev, |
| 55 | "failed to enable SRIOV on device, already enabled with %d vfs\n", |
| 56 | sriov->enabled_vfs); |
| 57 | return -EBUSY; |
Eli Cohen | fc50db9 | 2015-12-01 18:03:09 +0200 | [diff] [blame] | 58 | } |
Eli Cohen | fc50db9 | 2015-12-01 18:03:09 +0200 | [diff] [blame] | 59 | |
Mohamad Haj Yahia | 6b6adee | 2016-09-09 17:35:18 +0300 | [diff] [blame] | 60 | #ifdef CONFIG_MLX5_CORE_EN |
| 61 | err = mlx5_eswitch_enable_sriov(dev->priv.eswitch, num_vfs, SRIOV_LEGACY); |
Eli Cohen | fc50db9 | 2015-12-01 18:03:09 +0200 | [diff] [blame] | 62 | if (err) { |
Mohamad Haj Yahia | 6b6adee | 2016-09-09 17:35:18 +0300 | [diff] [blame] | 63 | mlx5_core_warn(dev, |
| 64 | "failed to enable eswitch SRIOV (%d)\n", err); |
| 65 | return err; |
| 66 | } |
| 67 | #endif |
| 68 | |
| 69 | for (vf = 0; vf < num_vfs; vf++) { |
| 70 | err = mlx5_core_enable_hca(dev, vf + 1); |
| 71 | if (err) { |
| 72 | mlx5_core_warn(dev, "failed to enable VF %d (%d)\n", vf, err); |
| 73 | continue; |
| 74 | } |
| 75 | sriov->vfs_ctx[vf].enabled = 1; |
| 76 | sriov->enabled_vfs++; |
| 77 | mlx5_core_dbg(dev, "successfully enabled VF* %d\n", vf); |
| 78 | |
Eli Cohen | fc50db9 | 2015-12-01 18:03:09 +0200 | [diff] [blame] | 79 | } |
| 80 | |
| 81 | return 0; |
Mohamad Haj Yahia | 6b6adee | 2016-09-09 17:35:18 +0300 | [diff] [blame] | 82 | } |
Eli Cohen | fc50db9 | 2015-12-01 18:03:09 +0200 | [diff] [blame] | 83 | |
Mohamad Haj Yahia | 6b6adee | 2016-09-09 17:35:18 +0300 | [diff] [blame] | 84 | static void mlx5_device_disable_sriov(struct mlx5_core_dev *dev) |
| 85 | { |
| 86 | struct mlx5_core_sriov *sriov = &dev->priv.sriov; |
| 87 | int err; |
| 88 | int vf; |
| 89 | |
| 90 | if (!sriov->enabled_vfs) |
| 91 | return; |
| 92 | |
| 93 | for (vf = 0; vf < sriov->num_vfs; vf++) { |
| 94 | if (!sriov->vfs_ctx[vf].enabled) |
| 95 | continue; |
| 96 | err = mlx5_core_disable_hca(dev, vf + 1); |
| 97 | if (err) { |
| 98 | mlx5_core_warn(dev, "failed to disable VF %d\n", vf); |
| 99 | continue; |
| 100 | } |
| 101 | sriov->vfs_ctx[vf].enabled = 0; |
| 102 | sriov->enabled_vfs--; |
| 103 | } |
| 104 | |
| 105 | #ifdef CONFIG_MLX5_CORE_EN |
| 106 | mlx5_eswitch_disable_sriov(dev->priv.eswitch); |
| 107 | #endif |
| 108 | |
| 109 | if (mlx5_wait_for_vf_pages(dev)) |
| 110 | mlx5_core_warn(dev, "timeout reclaiming VFs pages\n"); |
| 111 | } |
| 112 | |
| 113 | static int mlx5_pci_enable_sriov(struct pci_dev *pdev, int num_vfs) |
| 114 | { |
| 115 | struct mlx5_core_dev *dev = pci_get_drvdata(pdev); |
| 116 | int err = 0; |
| 117 | |
| 118 | if (pci_num_vf(pdev)) { |
| 119 | mlx5_core_warn(dev, "Unable to enable pci sriov, already enabled\n"); |
| 120 | return -EBUSY; |
| 121 | } |
| 122 | |
| 123 | err = pci_enable_sriov(pdev, num_vfs); |
| 124 | if (err) |
| 125 | mlx5_core_warn(dev, "pci_enable_sriov failed : %d\n", err); |
| 126 | |
Eli Cohen | fc50db9 | 2015-12-01 18:03:09 +0200 | [diff] [blame] | 127 | return err; |
| 128 | } |
| 129 | |
Mohamad Haj Yahia | 6b6adee | 2016-09-09 17:35:18 +0300 | [diff] [blame] | 130 | static void mlx5_pci_disable_sriov(struct pci_dev *pdev) |
| 131 | { |
| 132 | pci_disable_sriov(pdev); |
| 133 | } |
| 134 | |
| 135 | static int mlx5_sriov_enable(struct pci_dev *pdev, int num_vfs) |
Eli Cohen | fc50db9 | 2015-12-01 18:03:09 +0200 | [diff] [blame] | 136 | { |
| 137 | struct mlx5_core_dev *dev = pci_get_drvdata(pdev); |
| 138 | struct mlx5_core_sriov *sriov = &dev->priv.sriov; |
Mohamad Haj Yahia | 6b6adee | 2016-09-09 17:35:18 +0300 | [diff] [blame] | 139 | int err = 0; |
Eli Cohen | fc50db9 | 2015-12-01 18:03:09 +0200 | [diff] [blame] | 140 | |
Mohamad Haj Yahia | 6b6adee | 2016-09-09 17:35:18 +0300 | [diff] [blame] | 141 | err = mlx5_device_enable_sriov(dev, num_vfs); |
Eli Cohen | fc50db9 | 2015-12-01 18:03:09 +0200 | [diff] [blame] | 142 | if (err) { |
Mohamad Haj Yahia | 6b6adee | 2016-09-09 17:35:18 +0300 | [diff] [blame] | 143 | mlx5_core_warn(dev, "mlx5_device_enable_sriov failed : %d\n", err); |
Eli Cohen | fc50db9 | 2015-12-01 18:03:09 +0200 | [diff] [blame] | 144 | return err; |
| 145 | } |
| 146 | |
Mohamad Haj Yahia | 6b6adee | 2016-09-09 17:35:18 +0300 | [diff] [blame] | 147 | err = mlx5_pci_enable_sriov(pdev, num_vfs); |
| 148 | if (err) { |
| 149 | mlx5_core_warn(dev, "mlx5_pci_enable_sriov failed : %d\n", err); |
| 150 | mlx5_device_disable_sriov(dev); |
| 151 | return err; |
| 152 | } |
| 153 | |
| 154 | sriov->num_vfs = num_vfs; |
| 155 | |
Eli Cohen | fc50db9 | 2015-12-01 18:03:09 +0200 | [diff] [blame] | 156 | return 0; |
| 157 | } |
| 158 | |
Mohamad Haj Yahia | 6b6adee | 2016-09-09 17:35:18 +0300 | [diff] [blame] | 159 | static void mlx5_sriov_disable(struct pci_dev *pdev) |
Eli Cohen | fc50db9 | 2015-12-01 18:03:09 +0200 | [diff] [blame] | 160 | { |
Mohamad Haj Yahia | 6b6adee | 2016-09-09 17:35:18 +0300 | [diff] [blame] | 161 | struct mlx5_core_dev *dev = pci_get_drvdata(pdev); |
Eli Cohen | fc50db9 | 2015-12-01 18:03:09 +0200 | [diff] [blame] | 162 | struct mlx5_core_sriov *sriov = &dev->priv.sriov; |
| 163 | |
Mohamad Haj Yahia | 6b6adee | 2016-09-09 17:35:18 +0300 | [diff] [blame] | 164 | mlx5_pci_disable_sriov(pdev); |
| 165 | mlx5_device_disable_sriov(dev); |
Eli Cohen | fc50db9 | 2015-12-01 18:03:09 +0200 | [diff] [blame] | 166 | sriov->num_vfs = 0; |
| 167 | } |
| 168 | |
| 169 | int mlx5_core_sriov_configure(struct pci_dev *pdev, int num_vfs) |
| 170 | { |
| 171 | struct mlx5_core_dev *dev = pci_get_drvdata(pdev); |
Mohamad Haj Yahia | 6b6adee | 2016-09-09 17:35:18 +0300 | [diff] [blame] | 172 | int err = 0; |
Eli Cohen | fc50db9 | 2015-12-01 18:03:09 +0200 | [diff] [blame] | 173 | |
Masanari Iida | c19ca6c | 2016-02-08 20:53:12 +0900 | [diff] [blame] | 174 | mlx5_core_dbg(dev, "requested num_vfs %d\n", num_vfs); |
Eli Cohen | fc50db9 | 2015-12-01 18:03:09 +0200 | [diff] [blame] | 175 | if (!mlx5_core_is_pf(dev)) |
| 176 | return -EPERM; |
| 177 | |
Aviv Heller | edb31b1 | 2016-04-17 19:32:13 +0300 | [diff] [blame] | 178 | if (num_vfs && mlx5_lag_is_active(dev)) { |
| 179 | mlx5_core_warn(dev, "can't turn sriov on while LAG is active"); |
| 180 | return -EINVAL; |
| 181 | } |
| 182 | |
Mohamad Haj Yahia | 6b6adee | 2016-09-09 17:35:18 +0300 | [diff] [blame] | 183 | if (num_vfs) |
| 184 | err = mlx5_sriov_enable(pdev, num_vfs); |
| 185 | else |
| 186 | mlx5_sriov_disable(pdev); |
Eli Cohen | fc50db9 | 2015-12-01 18:03:09 +0200 | [diff] [blame] | 187 | |
Mohamad Haj Yahia | 6b6adee | 2016-09-09 17:35:18 +0300 | [diff] [blame] | 188 | return err ? err : num_vfs; |
Eli Cohen | fc50db9 | 2015-12-01 18:03:09 +0200 | [diff] [blame] | 189 | } |
| 190 | |
Mohamad Haj Yahia | acab721 | 2016-09-09 17:35:21 +0300 | [diff] [blame] | 191 | int mlx5_sriov_attach(struct mlx5_core_dev *dev) |
| 192 | { |
| 193 | struct mlx5_core_sriov *sriov = &dev->priv.sriov; |
| 194 | |
| 195 | if (!mlx5_core_is_pf(dev) || !sriov->num_vfs) |
| 196 | return 0; |
| 197 | |
| 198 | /* If sriov VFs exist in PCI level, enable them in device level */ |
| 199 | return mlx5_device_enable_sriov(dev, sriov->num_vfs); |
| 200 | } |
| 201 | |
| 202 | void mlx5_sriov_detach(struct mlx5_core_dev *dev) |
| 203 | { |
| 204 | if (!mlx5_core_is_pf(dev)) |
| 205 | return; |
| 206 | |
| 207 | mlx5_device_disable_sriov(dev); |
| 208 | } |
| 209 | |
Eli Cohen | fc50db9 | 2015-12-01 18:03:09 +0200 | [diff] [blame] | 210 | int mlx5_sriov_init(struct mlx5_core_dev *dev) |
| 211 | { |
| 212 | struct mlx5_core_sriov *sriov = &dev->priv.sriov; |
| 213 | struct pci_dev *pdev = dev->pdev; |
Mohamad Haj Yahia | 6b6adee | 2016-09-09 17:35:18 +0300 | [diff] [blame] | 214 | int total_vfs; |
Eli Cohen | fc50db9 | 2015-12-01 18:03:09 +0200 | [diff] [blame] | 215 | |
| 216 | if (!mlx5_core_is_pf(dev)) |
| 217 | return 0; |
| 218 | |
Mohamad Haj Yahia | 6b6adee | 2016-09-09 17:35:18 +0300 | [diff] [blame] | 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); |
Eli Cohen | fc50db9 | 2015-12-01 18:03:09 +0200 | [diff] [blame] | 222 | if (!sriov->vfs_ctx) |
| 223 | return -ENOMEM; |
| 224 | |
Mohamad Haj Yahia | c2d6e31 | 2016-09-09 17:35:23 +0300 | [diff] [blame] | 225 | return 0; |
Eli Cohen | fc50db9 | 2015-12-01 18:03:09 +0200 | [diff] [blame] | 226 | } |
| 227 | |
Mohamad Haj Yahia | 6b6adee | 2016-09-09 17:35:18 +0300 | [diff] [blame] | 228 | void mlx5_sriov_cleanup(struct mlx5_core_dev *dev) |
Eli Cohen | fc50db9 | 2015-12-01 18:03:09 +0200 | [diff] [blame] | 229 | { |
Mohamad Haj Yahia | 6b6adee | 2016-09-09 17:35:18 +0300 | [diff] [blame] | 230 | struct mlx5_core_sriov *sriov = &dev->priv.sriov; |
Eli Cohen | fc50db9 | 2015-12-01 18:03:09 +0200 | [diff] [blame] | 231 | |
| 232 | if (!mlx5_core_is_pf(dev)) |
Mohamad Haj Yahia | 6b6adee | 2016-09-09 17:35:18 +0300 | [diff] [blame] | 233 | return; |
Mohamad Haj Yahia | c2d6e31 | 2016-09-09 17:35:23 +0300 | [diff] [blame] | 234 | |
Mohamad Haj Yahia | 6b6adee | 2016-09-09 17:35:18 +0300 | [diff] [blame] | 235 | kfree(sriov->vfs_ctx); |
Eli Cohen | fc50db9 | 2015-12-01 18:03:09 +0200 | [diff] [blame] | 236 | } |