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/****************************************************************************
* Driver for Solarflare network controllers and boards
* Copyright 2015 Solarflare Communications 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 <linux/pci.h>
#include <linux/module.h>
#include "net_driver.h"
#include "ef10_sriov.h"
#include "efx.h"
#include "nic.h"
#include "mcdi_pcol.h"
static int efx_ef10_pci_sriov_enable(struct efx_nic *efx, int num_vfs)
{
int rc = 0;
struct pci_dev *dev = efx->pci_dev;
efx->vf_count = num_vfs;
rc = pci_enable_sriov(dev, num_vfs);
if (rc) {
efx->vf_count = 0;
netif_err(efx, probe, efx->net_dev,
"Failed to enable SRIOV VFs\n");
}
return rc;
}
static int efx_ef10_pci_sriov_disable(struct efx_nic *efx)
{
struct pci_dev *dev = efx->pci_dev;
efx->vf_count = 0;
pci_disable_sriov(dev);
return 0;
}
int efx_ef10_sriov_configure(struct efx_nic *efx, int num_vfs)
{
if (num_vfs == 0)
return efx_ef10_pci_sriov_disable(efx);
else
return efx_ef10_pci_sriov_enable(efx, num_vfs);
}
static int efx_ef10_vswitch_alloc(struct efx_nic *efx, unsigned int port_id,
unsigned int vswitch_type)
{
MCDI_DECLARE_BUF(inbuf, MC_CMD_VSWITCH_ALLOC_IN_LEN);
MCDI_SET_DWORD(inbuf, VSWITCH_ALLOC_IN_UPSTREAM_PORT_ID, port_id);
MCDI_SET_DWORD(inbuf, VSWITCH_ALLOC_IN_TYPE, vswitch_type);
MCDI_SET_DWORD(inbuf, VSWITCH_ALLOC_IN_NUM_VLAN_TAGS, 0);
MCDI_POPULATE_DWORD_1(inbuf, VSWITCH_ALLOC_IN_FLAGS,
VSWITCH_ALLOC_IN_FLAG_AUTO_PORT, 0);
return efx_mcdi_rpc(efx, MC_CMD_VSWITCH_ALLOC, inbuf, sizeof(inbuf),
NULL, 0, NULL);
}
static int efx_ef10_vswitch_free(struct efx_nic *efx, unsigned int port_id)
{
MCDI_DECLARE_BUF(inbuf, MC_CMD_VSWITCH_FREE_IN_LEN);
MCDI_SET_DWORD(inbuf, VSWITCH_FREE_IN_UPSTREAM_PORT_ID, port_id);
return efx_mcdi_rpc(efx, MC_CMD_VSWITCH_FREE, inbuf, sizeof(inbuf),
NULL, 0, NULL);
}
static int efx_ef10_vport_alloc(struct efx_nic *efx,
unsigned int port_id_in,
unsigned int vport_type,
unsigned int *port_id_out)
{
MCDI_DECLARE_BUF(inbuf, MC_CMD_VPORT_ALLOC_IN_LEN);
MCDI_DECLARE_BUF(outbuf, MC_CMD_VPORT_ALLOC_OUT_LEN);
size_t outlen;
int rc;
EFX_WARN_ON_PARANOID(!port_id_out);
MCDI_SET_DWORD(inbuf, VPORT_ALLOC_IN_UPSTREAM_PORT_ID, port_id_in);
MCDI_SET_DWORD(inbuf, VPORT_ALLOC_IN_TYPE, vport_type);
MCDI_SET_DWORD(inbuf, VPORT_ALLOC_IN_NUM_VLAN_TAGS, 0);
MCDI_POPULATE_DWORD_1(inbuf, VPORT_ALLOC_IN_FLAGS,
VPORT_ALLOC_IN_FLAG_AUTO_PORT, 0);
rc = efx_mcdi_rpc(efx, MC_CMD_VPORT_ALLOC, inbuf, sizeof(inbuf),
outbuf, sizeof(outbuf), &outlen);
if (rc)
return rc;
if (outlen < MC_CMD_VPORT_ALLOC_OUT_LEN)
return -EIO;
*port_id_out = MCDI_DWORD(outbuf, VPORT_ALLOC_OUT_VPORT_ID);
return 0;
}
static int efx_ef10_vport_free(struct efx_nic *efx, unsigned int port_id)
{
MCDI_DECLARE_BUF(inbuf, MC_CMD_VPORT_FREE_IN_LEN);
MCDI_SET_DWORD(inbuf, VPORT_FREE_IN_VPORT_ID, port_id);
return efx_mcdi_rpc(efx, MC_CMD_VPORT_FREE, inbuf, sizeof(inbuf),
NULL, 0, NULL);
}
/* On top of the default firmware vswitch setup, create a VEB vswitch and
* expansion vport for use by this function.
*/
int efx_ef10_vswitching_probe(struct efx_nic *efx)
{
struct efx_ef10_nic_data *nic_data = efx->nic_data;
int rc;
if (pci_sriov_get_totalvfs(efx->pci_dev) <= 0)
return 0; /* vswitch not needed as we have no VFs */
rc = efx_ef10_vswitch_alloc(efx, EVB_PORT_ID_ASSIGNED,
MC_CMD_VSWITCH_ALLOC_IN_VSWITCH_TYPE_VEB);
if (rc)
goto fail1;
rc = efx_ef10_vport_alloc(efx, EVB_PORT_ID_ASSIGNED,
MC_CMD_VPORT_ALLOC_IN_VPORT_TYPE_NORMAL,
&nic_data->vport_id);
if (rc)
goto fail2;
return 0;
fail2:
efx_ef10_vswitch_free(efx, EVB_PORT_ID_ASSIGNED);
fail1:
return rc;
}
int efx_ef10_vswitching_restore(struct efx_nic *efx)
{
struct efx_ef10_nic_data *nic_data = efx->nic_data;
int rc;
if (!nic_data->must_probe_vswitching)
return 0;
rc = efx_ef10_vswitching_probe(efx);
if (!rc)
nic_data->must_probe_vswitching = false;
return rc;
}
void efx_ef10_vswitching_remove(struct efx_nic *efx)
{
struct efx_ef10_nic_data *nic_data = efx->nic_data;
if (nic_data->vport_id == EVB_PORT_ID_ASSIGNED)
return; /* No vswitch was ever created */
efx_ef10_vport_free(efx, nic_data->vport_id);
nic_data->vport_id = EVB_PORT_ID_ASSIGNED;
efx_ef10_vswitch_free(efx, nic_data->vport_id);
}
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