1 // SPDX-License-Identifier: GPL-2.0 2 /* Copyright(c) 2013 - 2018 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 **/ 11 static 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 **/ 36 static int fm10k_dcbnl_ieee_setets(struct net_device *dev, struct ieee_ets *ets) 37 { 38 u8 num_tc = 0; 39 int i, err; 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 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 **/ 77 static 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 **/ 93 static 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_ieee_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 **/ 113 static 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_ieee_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 **/ 125 static 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 } 129 130 static 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 **/ 146 void 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 } 154