LXR linux/drivers/net/ethernet/intel/fm10k/fm10k

   1/* Intel Ethernet Switch Host Interface Driver
   2 * Copyright(c) 2013 - 2015 Intel Corporation.
   3 *
   4 * This program is free software; you can redistribute it and/or modify it
   5 * under the terms and conditions of the GNU General Public License,
   6 * version 2, as published by the Free Software Foundation.
   7 *
   8 * This program is distributed in the hope it will be useful, but WITHOUT
   9 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  10 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  11 * more details.
  12 *
  13 * The full GNU General Public License is included in this distribution in
  14 * the file called "COPYING".
  15 *
  16 * Contact Information:
  17 * e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
  18 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  19 */
  20
  21#include "fm10k.h"
  22
  23/**
  24 * fm10k_dcbnl_ieee_getets - get the ETS configuration for the device
  25 * @dev: netdev interface for the device
  26 * @ets: ETS structure to push configuration to
  27 **/
  28static int fm10k_dcbnl_ieee_getets(struct net_device *dev, struct ieee_ets *ets)
  29{
  30        int i;
  31
  32        /* we support 8 TCs in all modes */
  33        ets->ets_cap = IEEE_8021QAZ_MAX_TCS;
  34        ets->cbs = 0;
  35
  36        /* we only support strict priority and cannot do traffic shaping */
  37        memset(ets->tc_tx_bw, 0, sizeof(ets->tc_tx_bw));
  38        memset(ets->tc_rx_bw, 0, sizeof(ets->tc_rx_bw));
  39        memset(ets->tc_tsa, IEEE_8021QAZ_TSA_STRICT, sizeof(ets->tc_tsa));
  40
  41        /* populate the prio map based on the netdev */
  42        for (i = 0; i < IEEE_8021QAZ_MAX_TCS; i++)
  43                ets->prio_tc[i] = netdev_get_prio_tc_map(dev, i);
  44
  45        return 0;
  46}
  47
  48/**
  49 * fm10k_dcbnl_ieee_setets - set the ETS configuration for the device
  50 * @dev: netdev interface for the device
  51 * @ets: ETS structure to pull configuration from
  52 **/
  53static int fm10k_dcbnl_ieee_setets(struct net_device *dev, struct ieee_ets *ets)
  54{
  55        u8 num_tc = 0;
  56        int i, err;
  57
  58        /* verify type and determine num_tcs needed */
  59        for (i = 0; i < IEEE_8021QAZ_MAX_TCS; i++) {
  60                if (ets->tc_tx_bw[i] || ets->tc_rx_bw[i])
  61                        return -EINVAL;
  62                if (ets->tc_tsa[i] != IEEE_8021QAZ_TSA_STRICT)
  63                        return -EINVAL;
  64                if (ets->prio_tc[i] > num_tc)
  65                        num_tc = ets->prio_tc[i];
  66        }
  67
  68        /* if requested TC is greater than 0 then num_tcs is max + 1 */
  69        if (num_tc)
  70                num_tc++;
  71
  72        if (num_tc > IEEE_8021QAZ_MAX_TCS)
  73                return -EINVAL;
  74
  75        /* update TC hardware mapping if necessary */
  76        if (num_tc != netdev_get_num_tc(dev)) {
  77                err = fm10k_setup_tc(dev, num_tc);
  78                if (err)
  79                        return err;
  80        }
  81
  82        /* update priority mapping */
  83        for (i = 0; i < IEEE_8021QAZ_MAX_TCS; i++)
  84                netdev_set_prio_tc_map(dev, i, ets->prio_tc[i]);
  85
  86        return 0;
  87}
  88
  89/**
  90 * fm10k_dcbnl_ieee_getpfc - get the PFC configuration for the device
  91 * @dev: netdev interface for the device
  92 * @pfc: PFC structure to push configuration to
  93 **/
  94static int fm10k_dcbnl_ieee_getpfc(struct net_device *dev, struct ieee_pfc *pfc)
  95{
  96        struct fm10k_intfc *interface = netdev_priv(dev);
  97
  98        /* record flow control max count and state of TCs */
  99        pfc->pfc_cap = IEEE_8021QAZ_MAX_TCS;
 100        pfc->pfc_en = interface->pfc_en;
 101
 102        return 0;
 103}
 104
 105/**
 106 * fm10k_dcbnl_ieee_setpfc - set the PFC configuration for the device
 107 * @dev: netdev interface for the device
 108 * @pfc: PFC structure to pull configuration from
 109 **/
 110static int fm10k_dcbnl_ieee_setpfc(struct net_device *dev, struct ieee_pfc *pfc)
 111{
 112        struct fm10k_intfc *interface = netdev_priv(dev);
 113
 114        /* record PFC configuration to interface */
 115        interface->pfc_en = pfc->pfc_en;
 116
 117        /* if we are running update the drop_en state for all queues */
 118        if (netif_running(dev))
 119                fm10k_update_rx_drop_en(interface);
 120
 121        return 0;
 122}
 123
 124/**
 125 * fm10k_dcbnl_ieee_getdcbx - get the DCBX configuration for the device
 126 * @dev: netdev interface for the device
 127 *
 128 * Returns that we support only IEEE DCB for this interface
 129 **/
 130static u8 fm10k_dcbnl_getdcbx(struct net_device __always_unused *dev)
 131{
 132        return DCB_CAP_DCBX_HOST | DCB_CAP_DCBX_VER_IEEE;
 133}
 134
 135/**
 136 * fm10k_dcbnl_ieee_setdcbx - get the DCBX configuration for the device
 137 * @dev: netdev interface for the device
 138 * @mode: new mode for this device
 139 *
 140 * Returns error on attempt to enable anything but IEEE DCB for this interface
 141 **/
 142static u8 fm10k_dcbnl_setdcbx(struct net_device __always_unused *dev, u8 mode)
 143{
 144        return (mode != (DCB_CAP_DCBX_HOST | DCB_CAP_DCBX_VER_IEEE)) ? 1 : 0;
 145}
 146
 147static const struct dcbnl_rtnl_ops fm10k_dcbnl_ops = {
 148        .ieee_getets    = fm10k_dcbnl_ieee_getets,
 149        .ieee_setets    = fm10k_dcbnl_ieee_setets,
 150        .ieee_getpfc    = fm10k_dcbnl_ieee_getpfc,
 151        .ieee_setpfc    = fm10k_dcbnl_ieee_setpfc,
 152
 153        .getdcbx        = fm10k_dcbnl_getdcbx,
 154        .setdcbx        = fm10k_dcbnl_setdcbx,
 155};
 156
 157/**
 158 * fm10k_dcbnl_set_ops - Configures dcbnl ops pointer for netdev
 159 * @dev: netdev interface for the device
 160 *
 161 * Enables PF for DCB by assigning DCBNL ops pointer.
 162 **/
 163void fm10k_dcbnl_set_ops(struct net_device *dev)
 164{
 165        struct fm10k_intfc *interface = netdev_priv(dev);
 166        struct fm10k_hw *hw = &interface->hw;
 167
 168        if (hw->mac.type == fm10k_mac_pf)
 169                dev->dcbnl_ops = &fm10k_dcbnl_ops;
 170}
 171