1 /* Intel(R) Ethernet Switch Host Interface Driver 2 * Copyright(c) 2013 - 2016 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 **/ 28 static 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 **/ 53 static 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 **/ 94 static 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 **/ 110 static 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 **/ 130 static 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 **/ 142 static 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 } 146 147 static 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 **/ 163 void 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