78a9b3c47b
This patch extends the EF100 PF driver by adding .sriov_configure() which would allow users to enable and disable virtual functions using the sriov sysfs. Signed-off-by: Pieter Jansen van Vuuren <pieter.jansen-van-vuuren@amd.com> Signed-off-by: Edward Cree <ecree.xilinx@gmail.com> Link: https://lore.kernel.org/r/75e74d9e-14ce-0524-9668-5ab735a7cf62@gmail.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
56 lines
1.4 KiB
C
56 lines
1.4 KiB
C
// 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);
|
|
}
|