/* * Copyright (c) 2014, Mellanox Technologies inc. All rights reserved. * * This software is available to you under a choice of one of two * licenses. You may choose to be licensed under the terms of the GNU * General Public License (GPL) Version 2, available from the file * COPYING in the main directory of this source tree, or the * OpenIB.org BSD license below: * * Redistribution and use in source and binary forms, with or * without modification, are permitted provided that the following * conditions are met: * * - Redistributions of source code must retain the above * copyright notice, this list of conditions and the following * disclaimer. * * - Redistributions in binary form must reproduce the above * copyright notice, this list of conditions and the following * disclaimer in the documentation and/or other materials * provided with the distribution. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE.
*/
staticint mlx5_device_enable_sriov(struct mlx5_core_dev *dev, int num_vfs)
{ struct mlx5_core_sriov *sriov = &dev->priv.sriov; int err, vf, num_msix_count; int vport_num;
err = mlx5_eswitch_enable(dev->priv.eswitch, num_vfs); if (err) {
mlx5_core_warn(dev, "failed to enable eswitch SRIOV (%d)\n", err); return err;
}
num_msix_count = mlx5_get_default_msix_vec_count(dev, num_vfs); for (vf = 0; vf < num_vfs; vf++) { /* Notify the VF before its enablement to let it set * some stuff.
*/
blocking_notifier_call_chain(&sriov->vfs_ctx[vf].notifier,
MLX5_PF_NOTIFY_ENABLE_VF, dev);
err = mlx5_core_enable_hca(dev, vf + 1); if (err) {
mlx5_core_warn(dev, "failed to enable VF %d (%d)\n", vf, err); continue;
}
err = mlx5_set_msix_vec_count(dev, vf + 1, num_msix_count); if (err) {
mlx5_core_warn(dev, "failed to set MSI-X vector counts VF %d, err %d\n",
vf, err); continue;
}
staticvoid
mlx5_device_disable_sriov(struct mlx5_core_dev *dev, int num_vfs, bool clear_vf, bool num_vf_change)
{ struct mlx5_core_sriov *sriov = &dev->priv.sriov; bool wait_for_ec_vf_pages = true; bool wait_for_vf_pages = true; int err; int vf;
for (vf = num_vfs - 1; vf >= 0; vf--) { if (!sriov->vfs_ctx[vf].enabled) continue; /* Notify the VF before its disablement to let it clean * some resources.
*/
blocking_notifier_call_chain(&sriov->vfs_ctx[vf].notifier,
MLX5_PF_NOTIFY_DISABLE_VF, dev);
err = mlx5_core_disable_hca(dev, vf + 1); if (err) {
mlx5_core_warn(dev, "failed to disable VF %d\n", vf); continue;
}
sriov->vfs_ctx[vf].enabled = 0;
}
/* There are a number of scenarios when SRIOV is being disabled: * 1. VFs or ECVFs had been created, and now set back to 0 (num_vf_change == true). * - If EC SRIOV is enabled then this flow is happening on the * embedded platform, wait for only EC VF pages. * - If EC SRIOV is not enabled this flow is happening on non-embedded * platform, wait for the VF pages. * * 2. The driver is being unloaded. In this case wait for all pages.
*/ if (num_vf_change) { if (mlx5_core_ec_sriov_enabled(dev))
wait_for_vf_pages = false; else
wait_for_ec_vf_pages = false;
}
if (mlx5_core_is_ecpf_esw_manager(dev)) {
out = mlx5_esw_query_functions(dev);
/* Old FW doesn't support getting total_vfs from esw func * but supports getting it from pci_sriov.
*/ if (IS_ERR(out)) goto done;
host_total_vfs = MLX5_GET(query_esw_functions_out, out,
host_params_context.host_total_vfs);
kvfree(out); return host_total_vfs;
}
done: return pci_sriov_get_totalvfs(dev->pdev);
}
int mlx5_sriov_init(struct mlx5_core_dev *dev)
{ struct mlx5_core_sriov *sriov = &dev->priv.sriov; struct pci_dev *pdev = dev->pdev; int total_vfs, i;
/** * mlx5_sriov_blocking_notifier_register - Register a VF notification * block chain. * * @mdev: The mlx5 core device. * @vf_id: The VF id. * @nb: The notifier block to be called upon the VF events. * * Returns 0 on success or an error code.
*/ int mlx5_sriov_blocking_notifier_register(struct mlx5_core_dev *mdev, int vf_id, struct notifier_block *nb)
{ struct mlx5_vf_context *vfs_ctx; struct mlx5_core_sriov *sriov;
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