Release 4.7 drivers/net/ethernet/intel/fm10k/fm10k_dcbnl.c
/* Intel(R) Ethernet Switch Host Interface Driver
* Copyright(c) 2013 - 2016 Intel Corporation.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* The full GNU General Public License is included in this distribution in
* the file called "COPYING".
*
* Contact Information:
* e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
* Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
*/
#include "fm10k.h"
/**
* fm10k_dcbnl_ieee_getets - get the ETS configuration for the device
* @dev: netdev interface for the device
* @ets: ETS structure to push configuration to
**/
static int fm10k_dcbnl_ieee_getets(struct net_device *dev, struct ieee_ets *ets)
{
int i;
/* we support 8 TCs in all modes */
ets->ets_cap = IEEE_8021QAZ_MAX_TCS;
ets->cbs = 0;
/* we only support strict priority and cannot do traffic shaping */
memset(ets->tc_tx_bw, 0, sizeof(ets->tc_tx_bw));
memset(ets->tc_rx_bw, 0, sizeof(ets->tc_rx_bw));
memset(ets->tc_tsa, IEEE_8021QAZ_TSA_STRICT, sizeof(ets->tc_tsa));
/* populate the prio map based on the netdev */
for (i = 0; i < IEEE_8021QAZ_MAX_TCS; i++)
ets->prio_tc[i] = netdev_get_prio_tc_map(dev, i);
return 0;
}
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/**
* fm10k_dcbnl_ieee_setets - set the ETS configuration for the device
* @dev: netdev interface for the device
* @ets: ETS structure to pull configuration from
**/
static int fm10k_dcbnl_ieee_setets(struct net_device *dev, struct ieee_ets *ets)
{
u8 num_tc = 0;
int i, err;
/* verify type and determine num_tcs needed */
for (i = 0; i < IEEE_8021QAZ_MAX_TCS; i++) {
if (ets->tc_tx_bw[i] || ets->tc_rx_bw[i])
return -EINVAL;
if (ets->tc_tsa[i] != IEEE_8021QAZ_TSA_STRICT)
return -EINVAL;
if (ets->prio_tc[i] > num_tc)
num_tc = ets->prio_tc[i];
}
/* if requested TC is greater than 0 then num_tcs is max + 1 */
if (num_tc)
num_tc++;
if (num_tc > IEEE_8021QAZ_MAX_TCS)
return -EINVAL;
/* update TC hardware mapping if necessary */
if (num_tc != netdev_get_num_tc(dev)) {
err = fm10k_setup_tc(dev, num_tc);
if (err)
return err;
}
/* update priority mapping */
for (i = 0; i < IEEE_8021QAZ_MAX_TCS; i++)
netdev_set_prio_tc_map(dev, i, ets->prio_tc[i]);
return 0;
}
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/**
* fm10k_dcbnl_ieee_getpfc - get the PFC configuration for the device
* @dev: netdev interface for the device
* @pfc: PFC structure to push configuration to
**/
static int fm10k_dcbnl_ieee_getpfc(struct net_device *dev, struct ieee_pfc *pfc)
{
struct fm10k_intfc *interface = netdev_priv(dev);
/* record flow control max count and state of TCs */
pfc->pfc_cap = IEEE_8021QAZ_MAX_TCS;
pfc->pfc_en = interface->pfc_en;
return 0;
}
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/**
* fm10k_dcbnl_ieee_setpfc - set the PFC configuration for the device
* @dev: netdev interface for the device
* @pfc: PFC structure to pull configuration from
**/
static int fm10k_dcbnl_ieee_setpfc(struct net_device *dev, struct ieee_pfc *pfc)
{
struct fm10k_intfc *interface = netdev_priv(dev);
/* record PFC configuration to interface */
interface->pfc_en = pfc->pfc_en;
/* if we are running update the drop_en state for all queues */
if (netif_running(dev))
fm10k_update_rx_drop_en(interface);
return 0;
}
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/**
* fm10k_dcbnl_ieee_getdcbx - get the DCBX configuration for the device
* @dev: netdev interface for the device
*
* Returns that we support only IEEE DCB for this interface
**/
static u8 fm10k_dcbnl_getdcbx(struct net_device __always_unused *dev)
{
return DCB_CAP_DCBX_HOST | DCB_CAP_DCBX_VER_IEEE;
}
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/**
* fm10k_dcbnl_ieee_setdcbx - get the DCBX configuration for the device
* @dev: netdev interface for the device
* @mode: new mode for this device
*
* Returns error on attempt to enable anything but IEEE DCB for this interface
**/
static u8 fm10k_dcbnl_setdcbx(struct net_device __always_unused *dev, u8 mode)
{
return (mode != (DCB_CAP_DCBX_HOST | DCB_CAP_DCBX_VER_IEEE)) ? 1 : 0;
}
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static const struct dcbnl_rtnl_ops fm10k_dcbnl_ops = {
.ieee_getets = fm10k_dcbnl_ieee_getets,
.ieee_setets = fm10k_dcbnl_ieee_setets,
.ieee_getpfc = fm10k_dcbnl_ieee_getpfc,
.ieee_setpfc = fm10k_dcbnl_ieee_setpfc,
.getdcbx = fm10k_dcbnl_getdcbx,
.setdcbx = fm10k_dcbnl_setdcbx,
};
/**
* fm10k_dcbnl_set_ops - Configures dcbnl ops pointer for netdev
* @dev: netdev interface for the device
*
* Enables PF for DCB by assigning DCBNL ops pointer.
**/
void fm10k_dcbnl_set_ops(struct net_device *dev)
{
struct fm10k_intfc *interface = netdev_priv(dev);
struct fm10k_hw *hw = &interface->hw;
if (hw->mac.type == fm10k_mac_pf)
dev->dcbnl_ops = &fm10k_dcbnl_ops;
}
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