73 lines
1.8 KiB
C
73 lines
1.8 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"
|
||
|
|
#include "ef100_rep.h"
|
||
|
|
|
||
|
|
static int efx_ef100_pci_sriov_enable(struct efx_nic *efx, int num_vfs)
|
||
|
|
{
|
||
|
|
struct ef100_nic_data *nic_data = efx->nic_data;
|
||
|
|
struct pci_dev *dev = efx->pci_dev;
|
||
|
|
struct efx_rep *efv, *next;
|
||
|
|
int rc, i;
|
||
|
|
|
||
|
|
efx->vf_count = num_vfs;
|
||
|
|
rc = pci_enable_sriov(dev, num_vfs);
|
||
|
|
if (rc)
|
||
|
|
goto fail1;
|
||
|
|
|
||
|
|
if (!nic_data->grp_mae)
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
for (i = 0; i < num_vfs; i++) {
|
||
|
|
rc = efx_ef100_vfrep_create(efx, i);
|
||
|
|
if (rc)
|
||
|
|
goto fail2;
|
||
|
|
}
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
fail2:
|
||
|
|
list_for_each_entry_safe(efv, next, &efx->vf_reps, list)
|
||
|
|
efx_ef100_vfrep_destroy(efx, efv);
|
||
|
|
pci_disable_sriov(dev);
|
||
|
|
fail1:
|
||
|
|
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, bool force)
|
||
|
|
{
|
||
|
|
struct pci_dev *dev = efx->pci_dev;
|
||
|
|
unsigned int vfs_assigned;
|
||
|
|
|
||
|
|
vfs_assigned = pci_vfs_assigned(dev);
|
||
|
|
if (vfs_assigned && !force) {
|
||
|
|
netif_info(efx, drv, efx->net_dev, "VFs are assigned to guests; "
|
||
|
|
"please detach them before disabling SR-IOV\n");
|
||
|
|
return -EBUSY;
|
||
|
|
}
|
||
|
|
|
||
|
|
efx_ef100_fini_vfreps(efx);
|
||
|
|
if (!vfs_assigned)
|
||
|
|
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, false);
|
||
|
|
else
|
||
|
|
return efx_ef100_pci_sriov_enable(efx, num_vfs);
|
||
|
|
}
|