1 /* SPDX-License-Identifier: BSD-3-Clause 2 * Copyright(c) 2001-2020 Intel Corporation 3 */ 4 5 #include "e1000_hw.h" 6 #include "e1000_82575.h" 7 #include "e1000_mac.h" 8 #include "e1000_base.h" 9 #include "e1000_manage.h" 10 11 /** 12 * e1000_acquire_phy_base - Acquire rights to access PHY 13 * @hw: pointer to the HW structure 14 * 15 * Acquire access rights to the correct PHY. 16 **/ 17 s32 e1000_acquire_phy_base(struct e1000_hw *hw) 18 { 19 u16 mask = E1000_SWFW_PHY0_SM; 20 21 DEBUGFUNC("e1000_acquire_phy_base"); 22 23 if (hw->bus.func == E1000_FUNC_1) 24 mask = E1000_SWFW_PHY1_SM; 25 else if (hw->bus.func == E1000_FUNC_2) 26 mask = E1000_SWFW_PHY2_SM; 27 else if (hw->bus.func == E1000_FUNC_3) 28 mask = E1000_SWFW_PHY3_SM; 29 30 return hw->mac.ops.acquire_swfw_sync(hw, mask); 31 } 32 33 /** 34 * e1000_release_phy_base - Release rights to access PHY 35 * @hw: pointer to the HW structure 36 * 37 * A wrapper to release access rights to the correct PHY. 38 **/ 39 void e1000_release_phy_base(struct e1000_hw *hw) 40 { 41 u16 mask = E1000_SWFW_PHY0_SM; 42 43 DEBUGFUNC("e1000_release_phy_base"); 44 45 if (hw->bus.func == E1000_FUNC_1) 46 mask = E1000_SWFW_PHY1_SM; 47 else if (hw->bus.func == E1000_FUNC_2) 48 mask = E1000_SWFW_PHY2_SM; 49 else if (hw->bus.func == E1000_FUNC_3) 50 mask = E1000_SWFW_PHY3_SM; 51 52 hw->mac.ops.release_swfw_sync(hw, mask); 53 } 54 55 /** 56 * e1000_init_hw_base - Initialize hardware 57 * @hw: pointer to the HW structure 58 * 59 * This inits the hardware readying it for operation. 60 **/ 61 s32 e1000_init_hw_base(struct e1000_hw *hw) 62 { 63 struct e1000_mac_info *mac = &hw->mac; 64 s32 ret_val; 65 u16 i, rar_count = mac->rar_entry_count; 66 67 DEBUGFUNC("e1000_init_hw_base"); 68 69 /* Setup the receive address */ 70 e1000_init_rx_addrs_generic(hw, rar_count); 71 72 /* Zero out the Multicast HASH table */ 73 DEBUGOUT("Zeroing the MTA\n"); 74 for (i = 0; i < mac->mta_reg_count; i++) 75 E1000_WRITE_REG_ARRAY(hw, E1000_MTA, i, 0); 76 77 /* Zero out the Unicast HASH table */ 78 DEBUGOUT("Zeroing the UTA\n"); 79 for (i = 0; i < mac->uta_reg_count; i++) 80 E1000_WRITE_REG_ARRAY(hw, E1000_UTA, i, 0); 81 82 /* Setup link and flow control */ 83 ret_val = mac->ops.setup_link(hw); 84 85 /* Clear all of the statistics registers (clear on read). It is 86 * important that we do this after we have tried to establish link 87 * because the symbol error count will increment wildly if there 88 * is no link. 89 */ 90 e1000_clear_hw_cntrs_base_generic(hw); 91 92 return ret_val; 93 } 94 95 /** 96 * e1000_power_down_phy_copper_base - Remove link during PHY power down 97 * @hw: pointer to the HW structure 98 * 99 * In the case of a PHY power down to save power, or to turn off link during a 100 * driver unload, or wake on lan is not enabled, remove the link. 101 **/ 102 void e1000_power_down_phy_copper_base(struct e1000_hw *hw) 103 { 104 struct e1000_phy_info *phy = &hw->phy; 105 106 if (!(phy->ops.check_reset_block)) 107 return; 108 109 /* If the management interface is not enabled, then power down */ 110 if (phy->ops.check_reset_block(hw)) 111 e1000_power_down_phy_copper(hw); 112 } 113 114 /** 115 * e1000_rx_fifo_flush_base - Clean Rx FIFO after Rx enable 116 * @hw: pointer to the HW structure 117 * 118 * After Rx enable, if manageability is enabled then there is likely some 119 * bad data at the start of the FIFO and possibly in the DMA FIFO. This 120 * function clears the FIFOs and flushes any packets that came in as Rx was 121 * being enabled. 122 **/ 123 void e1000_rx_fifo_flush_base(struct e1000_hw *hw) 124 { 125 u32 rctl, rlpml, rxdctl[4], rfctl, temp_rctl, rx_enabled; 126 int i, ms_wait; 127 128 DEBUGFUNC("e1000_rx_fifo_flush_base"); 129 130 /* disable IPv6 options as per hardware errata */ 131 rfctl = E1000_READ_REG(hw, E1000_RFCTL); 132 rfctl |= E1000_RFCTL_IPV6_EX_DIS; 133 E1000_WRITE_REG(hw, E1000_RFCTL, rfctl); 134 135 if (!(E1000_READ_REG(hw, E1000_MANC) & E1000_MANC_RCV_TCO_EN)) 136 return; 137 138 /* Disable all Rx queues */ 139 for (i = 0; i < 4; i++) { 140 rxdctl[i] = E1000_READ_REG(hw, E1000_RXDCTL(i)); 141 E1000_WRITE_REG(hw, E1000_RXDCTL(i), 142 rxdctl[i] & ~E1000_RXDCTL_QUEUE_ENABLE); 143 } 144 /* Poll all queues to verify they have shut down */ 145 for (ms_wait = 0; ms_wait < 10; ms_wait++) { 146 msec_delay(1); 147 rx_enabled = 0; 148 for (i = 0; i < 4; i++) 149 rx_enabled |= E1000_READ_REG(hw, E1000_RXDCTL(i)); 150 if (!(rx_enabled & E1000_RXDCTL_QUEUE_ENABLE)) 151 break; 152 } 153 154 if (ms_wait == 10) 155 DEBUGOUT("Queue disable timed out after 10ms\n"); 156 157 /* Clear RLPML, RCTL.SBP, RFCTL.LEF, and set RCTL.LPE so that all 158 * incoming packets are rejected. Set enable and wait 2ms so that 159 * any packet that was coming in as RCTL.EN was set is flushed 160 */ 161 E1000_WRITE_REG(hw, E1000_RFCTL, rfctl & ~E1000_RFCTL_LEF); 162 163 rlpml = E1000_READ_REG(hw, E1000_RLPML); 164 E1000_WRITE_REG(hw, E1000_RLPML, 0); 165 166 rctl = E1000_READ_REG(hw, E1000_RCTL); 167 temp_rctl = rctl & ~(E1000_RCTL_EN | E1000_RCTL_SBP); 168 temp_rctl |= E1000_RCTL_LPE; 169 170 E1000_WRITE_REG(hw, E1000_RCTL, temp_rctl); 171 E1000_WRITE_REG(hw, E1000_RCTL, temp_rctl | E1000_RCTL_EN); 172 E1000_WRITE_FLUSH(hw); 173 msec_delay(2); 174 175 /* Enable Rx queues that were previously enabled and restore our 176 * previous state 177 */ 178 for (i = 0; i < 4; i++) 179 E1000_WRITE_REG(hw, E1000_RXDCTL(i), rxdctl[i]); 180 E1000_WRITE_REG(hw, E1000_RCTL, rctl); 181 E1000_WRITE_FLUSH(hw); 182 183 E1000_WRITE_REG(hw, E1000_RLPML, rlpml); 184 E1000_WRITE_REG(hw, E1000_RFCTL, rfctl); 185 186 /* Flush receive errors generated by workaround */ 187 E1000_READ_REG(hw, E1000_ROC); 188 E1000_READ_REG(hw, E1000_RNBC); 189 E1000_READ_REG(hw, E1000_MPC); 190 } 191