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1// SPDX-License-Identifier: GPL-2.0-only2/****************************************************************************3 * Driver for Solarflare network controllers and boards4 * Copyright 2019 Solarflare Communications Inc.5 * Copyright 2020-2022 Xilinx Inc.6 *7 * This program is free software; you can redistribute it and/or modify it8 * under the terms of the GNU General Public License version 2 as published9 * by the Free Software Foundation, incorporated herein by reference.10 */11 12#include "ef100_sriov.h"13#include "ef100_nic.h"14#include "ef100_rep.h"15 16static int efx_ef100_pci_sriov_enable(struct efx_nic *efx, int num_vfs)17{18 struct ef100_nic_data *nic_data = efx->nic_data;19 struct pci_dev *dev = efx->pci_dev;20 struct efx_rep *efv, *next;21 int rc, i;22 23 efx->vf_count = num_vfs;24 rc = pci_enable_sriov(dev, num_vfs);25 if (rc)26 goto fail1;27 28 if (!nic_data->grp_mae)29 return 0;30 31 for (i = 0; i < num_vfs; i++) {32 rc = efx_ef100_vfrep_create(efx, i);33 if (rc)34 goto fail2;35 }36 return 0;37 38fail2:39 list_for_each_entry_safe(efv, next, &efx->vf_reps, list)40 efx_ef100_vfrep_destroy(efx, efv);41 pci_disable_sriov(dev);42fail1:43 netif_err(efx, probe, efx->net_dev, "Failed to enable SRIOV VFs\n");44 efx->vf_count = 0;45 return rc;46}47 48int efx_ef100_pci_sriov_disable(struct efx_nic *efx, bool force)49{50 struct pci_dev *dev = efx->pci_dev;51 unsigned int vfs_assigned;52 53 vfs_assigned = pci_vfs_assigned(dev);54 if (vfs_assigned && !force) {55 netif_info(efx, drv, efx->net_dev, "VFs are assigned to guests; "56 "please detach them before disabling SR-IOV\n");57 return -EBUSY;58 }59 60 efx_ef100_fini_vfreps(efx);61 if (!vfs_assigned)62 pci_disable_sriov(dev);63 return 0;64}65 66int efx_ef100_sriov_configure(struct efx_nic *efx, int num_vfs)67{68 if (num_vfs == 0)69 return efx_ef100_pci_sriov_disable(efx, false);70 else71 return efx_ef100_pci_sriov_enable(efx, num_vfs);72}73