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// SPDX-License-Identifier: GPL-2.0-only
/****************************************************************************
* Driver for Solarflare network controllers and boards
* Copyright 2019 Solarflare Communications Inc.
* Copyright 2020-2022 Xilinx Inc.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 as published
* by the Free Software Foundation, incorporated herein by reference.
*/
#include "ef100_sriov.h"
#include "ef100_nic.h"
static int efx_ef100_pci_sriov_enable(struct efx_nic *efx, int num_vfs)
{
struct pci_dev *dev = efx->pci_dev;
int rc;
efx->vf_count = num_vfs;
rc = pci_enable_sriov(dev, num_vfs);
if (rc)
goto fail;
return 0;
fail:
netif_err(efx, probe, efx->net_dev, "Failed to enable SRIOV VFs\n");
efx->vf_count = 0;
return rc;
}
int efx_ef100_pci_sriov_disable(struct efx_nic *efx)
{
struct pci_dev *dev = efx->pci_dev;
unsigned int vfs_assigned;
vfs_assigned = pci_vfs_assigned(dev);
if (vfs_assigned) {
netif_info(efx, drv, efx->net_dev, "VFs are assigned to guests; "
"please detach them before disabling SR-IOV\n");
return -EBUSY;
}
pci_disable_sriov(dev);
return 0;
}
int efx_ef100_sriov_configure(struct efx_nic *efx, int num_vfs)
{
if (num_vfs == 0)
return efx_ef100_pci_sriov_disable(efx);
else
return efx_ef100_pci_sriov_enable(efx, num_vfs);
}
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