cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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fm10k_dcbnl.c (4215B)

      1// SPDX-License-Identifier: GPL-2.0
      2/* Copyright(c) 2013 - 2019 Intel Corporation. */
      3
      4#include "fm10k.h"
      5
      6/**
      7 * fm10k_dcbnl_ieee_getets - get the ETS configuration for the device
      8 * @dev: netdev interface for the device
      9 * @ets: ETS structure to push configuration to
     10 **/
     11static int fm10k_dcbnl_ieee_getets(struct net_device *dev, struct ieee_ets *ets)
     12{
     13	int i;
     14
     15	/* we support 8 TCs in all modes */
     16	ets->ets_cap = IEEE_8021QAZ_MAX_TCS;
     17	ets->cbs = 0;
     18
     19	/* we only support strict priority and cannot do traffic shaping */
     20	memset(ets->tc_tx_bw, 0, sizeof(ets->tc_tx_bw));
     21	memset(ets->tc_rx_bw, 0, sizeof(ets->tc_rx_bw));
     22	memset(ets->tc_tsa, IEEE_8021QAZ_TSA_STRICT, sizeof(ets->tc_tsa));
     23
     24	/* populate the prio map based on the netdev */
     25	for (i = 0; i < IEEE_8021QAZ_MAX_TCS; i++)
     26		ets->prio_tc[i] = netdev_get_prio_tc_map(dev, i);
     27
     28	return 0;
     29}
     30
     31/**
     32 * fm10k_dcbnl_ieee_setets - set the ETS configuration for the device
     33 * @dev: netdev interface for the device
     34 * @ets: ETS structure to pull configuration from
     35 **/
     36static int fm10k_dcbnl_ieee_setets(struct net_device *dev, struct ieee_ets *ets)
     37{
     38	u8 num_tc = 0;
     39	int i;
     40
     41	/* verify type and determine num_tcs needed */
     42	for (i = 0; i < IEEE_8021QAZ_MAX_TCS; i++) {
     43		if (ets->tc_tx_bw[i] || ets->tc_rx_bw[i])
     44			return -EINVAL;
     45		if (ets->tc_tsa[i] != IEEE_8021QAZ_TSA_STRICT)
     46			return -EINVAL;
     47		if (ets->prio_tc[i] > num_tc)
     48			num_tc = ets->prio_tc[i];
     49	}
     50
     51	/* if requested TC is greater than 0 then num_tcs is max + 1 */
     52	if (num_tc)
     53		num_tc++;
     54
     55	if (num_tc > IEEE_8021QAZ_MAX_TCS)
     56		return -EINVAL;
     57
     58	/* update TC hardware mapping if necessary */
     59	if (num_tc != netdev_get_num_tc(dev)) {
     60		int err = fm10k_setup_tc(dev, num_tc);
     61		if (err)
     62			return err;
     63	}
     64
     65	/* update priority mapping */
     66	for (i = 0; i < IEEE_8021QAZ_MAX_TCS; i++)
     67		netdev_set_prio_tc_map(dev, i, ets->prio_tc[i]);
     68
     69	return 0;
     70}
     71
     72/**
     73 * fm10k_dcbnl_ieee_getpfc - get the PFC configuration for the device
     74 * @dev: netdev interface for the device
     75 * @pfc: PFC structure to push configuration to
     76 **/
     77static int fm10k_dcbnl_ieee_getpfc(struct net_device *dev, struct ieee_pfc *pfc)
     78{
     79	struct fm10k_intfc *interface = netdev_priv(dev);
     80
     81	/* record flow control max count and state of TCs */
     82	pfc->pfc_cap = IEEE_8021QAZ_MAX_TCS;
     83	pfc->pfc_en = interface->pfc_en;
     84
     85	return 0;
     86}
     87
     88/**
     89 * fm10k_dcbnl_ieee_setpfc - set the PFC configuration for the device
     90 * @dev: netdev interface for the device
     91 * @pfc: PFC structure to pull configuration from
     92 **/
     93static int fm10k_dcbnl_ieee_setpfc(struct net_device *dev, struct ieee_pfc *pfc)
     94{
     95	struct fm10k_intfc *interface = netdev_priv(dev);
     96
     97	/* record PFC configuration to interface */
     98	interface->pfc_en = pfc->pfc_en;
     99
    100	/* if we are running update the drop_en state for all queues */
    101	if (netif_running(dev))
    102		fm10k_update_rx_drop_en(interface);
    103
    104	return 0;
    105}
    106
    107/**
    108 * fm10k_dcbnl_getdcbx - get the DCBX configuration for the device
    109 * @dev: netdev interface for the device
    110 *
    111 * Returns that we support only IEEE DCB for this interface
    112 **/
    113static u8 fm10k_dcbnl_getdcbx(struct net_device __always_unused *dev)
    114{
    115	return DCB_CAP_DCBX_HOST | DCB_CAP_DCBX_VER_IEEE;
    116}
    117
    118/**
    119 * fm10k_dcbnl_setdcbx - get the DCBX configuration for the device
    120 * @dev: netdev interface for the device
    121 * @mode: new mode for this device
    122 *
    123 * Returns error on attempt to enable anything but IEEE DCB for this interface
    124 **/
    125static u8 fm10k_dcbnl_setdcbx(struct net_device __always_unused *dev, u8 mode)
    126{
    127	return (mode != (DCB_CAP_DCBX_HOST | DCB_CAP_DCBX_VER_IEEE)) ? 1 : 0;
    128}
    129
    130static const struct dcbnl_rtnl_ops fm10k_dcbnl_ops = {
    131	.ieee_getets	= fm10k_dcbnl_ieee_getets,
    132	.ieee_setets	= fm10k_dcbnl_ieee_setets,
    133	.ieee_getpfc	= fm10k_dcbnl_ieee_getpfc,
    134	.ieee_setpfc	= fm10k_dcbnl_ieee_setpfc,
    135
    136	.getdcbx	= fm10k_dcbnl_getdcbx,
    137	.setdcbx	= fm10k_dcbnl_setdcbx,
    138};
    139
    140/**
    141 * fm10k_dcbnl_set_ops - Configures dcbnl ops pointer for netdev
    142 * @dev: netdev interface for the device
    143 *
    144 * Enables PF for DCB by assigning DCBNL ops pointer.
    145 **/
    146void fm10k_dcbnl_set_ops(struct net_device *dev)
    147{
    148	struct fm10k_intfc *interface = netdev_priv(dev);
    149	struct fm10k_hw *hw = &interface->hw;
    150
    151	if (hw->mac.type == fm10k_mac_pf)
    152		dev->dcbnl_ops = &fm10k_dcbnl_ops;
    153}