1 // SPDX-License-Identifier: GPL-2.0 2 /* Copyright (c) 2015 - 2022 Beijing WangXun Technology Co., Ltd. */ 3 4 #include <linux/etherdevice.h> 5 #include <linux/if_ether.h> 6 #include <linux/string.h> 7 #include <linux/iopoll.h> 8 #include <linux/types.h> 9 #include <linux/pci.h> 10 11 #include "../libwx/wx_type.h" 12 #include "../libwx/wx_hw.h" 13 #include "txgbe_type.h" 14 #include "txgbe_hw.h" 15 16 /** 17 * txgbe_disable_sec_tx_path - Stops the transmit data path 18 * @wx: pointer to hardware structure 19 * 20 * Stops the transmit data path and waits for the HW to internally empty 21 * the tx security block 22 **/ 23 int txgbe_disable_sec_tx_path(struct wx *wx) 24 { 25 int val; 26 27 wr32m(wx, WX_TSC_CTL, WX_TSC_CTL_TX_DIS, WX_TSC_CTL_TX_DIS); 28 return read_poll_timeout(rd32, val, val & WX_TSC_ST_SECTX_RDY, 29 1000, 20000, false, wx, WX_TSC_ST); 30 } 31 32 /** 33 * txgbe_enable_sec_tx_path - Enables the transmit data path 34 * @wx: pointer to hardware structure 35 * 36 * Enables the transmit data path. 37 **/ 38 void txgbe_enable_sec_tx_path(struct wx *wx) 39 { 40 wr32m(wx, WX_TSC_CTL, WX_TSC_CTL_TX_DIS, 0); 41 WX_WRITE_FLUSH(wx); 42 } 43 44 /** 45 * txgbe_init_thermal_sensor_thresh - Inits thermal sensor thresholds 46 * @wx: pointer to hardware structure 47 * 48 * Inits the thermal sensor thresholds according to the NVM map 49 * and save off the threshold and location values into mac.thermal_sensor_data 50 **/ 51 static void txgbe_init_thermal_sensor_thresh(struct wx *wx) 52 { 53 struct wx_thermal_sensor_data *data = &wx->mac.sensor; 54 55 memset(data, 0, sizeof(struct wx_thermal_sensor_data)); 56 57 /* Only support thermal sensors attached to SP physical port 0 */ 58 if (wx->bus.func) 59 return; 60 61 wr32(wx, TXGBE_TS_CTL, TXGBE_TS_CTL_EVAL_MD); 62 63 wr32(wx, WX_TS_INT_EN, 64 WX_TS_INT_EN_ALARM_INT_EN | WX_TS_INT_EN_DALARM_INT_EN); 65 wr32(wx, WX_TS_EN, WX_TS_EN_ENA); 66 67 data->alarm_thresh = 100; 68 wr32(wx, WX_TS_ALARM_THRE, 677); 69 data->dalarm_thresh = 90; 70 wr32(wx, WX_TS_DALARM_THRE, 614); 71 } 72 73 /** 74 * txgbe_calc_eeprom_checksum - Calculates and returns the checksum 75 * @wx: pointer to hardware structure 76 * @checksum: pointer to cheksum 77 * 78 * Returns a negative error code on error 79 **/ 80 static int txgbe_calc_eeprom_checksum(struct wx *wx, u16 *checksum) 81 { 82 u16 *eeprom_ptrs = NULL; 83 u16 *local_buffer; 84 int status; 85 u16 i; 86 87 wx_init_eeprom_params(wx); 88 89 eeprom_ptrs = kvmalloc_array(TXGBE_EEPROM_LAST_WORD, sizeof(u16), 90 GFP_KERNEL); 91 if (!eeprom_ptrs) 92 return -ENOMEM; 93 /* Read pointer area */ 94 status = wx_read_ee_hostif_buffer(wx, 0, TXGBE_EEPROM_LAST_WORD, eeprom_ptrs); 95 if (status != 0) { 96 wx_err(wx, "Failed to read EEPROM image\n"); 97 kvfree(eeprom_ptrs); 98 return status; 99 } 100 local_buffer = eeprom_ptrs; 101 102 for (i = 0; i < TXGBE_EEPROM_LAST_WORD; i++) 103 if (i != wx->eeprom.sw_region_offset + TXGBE_EEPROM_CHECKSUM) 104 *checksum += local_buffer[i]; 105 106 if (eeprom_ptrs) 107 kvfree(eeprom_ptrs); 108 109 *checksum = TXGBE_EEPROM_SUM - *checksum; 110 111 return 0; 112 } 113 114 /** 115 * txgbe_validate_eeprom_checksum - Validate EEPROM checksum 116 * @wx: pointer to hardware structure 117 * @checksum_val: calculated checksum 118 * 119 * Performs checksum calculation and validates the EEPROM checksum. If the 120 * caller does not need checksum_val, the value can be NULL. 121 **/ 122 int txgbe_validate_eeprom_checksum(struct wx *wx, u16 *checksum_val) 123 { 124 u16 read_checksum = 0; 125 u16 checksum; 126 int status; 127 128 /* Read the first word from the EEPROM. If this times out or fails, do 129 * not continue or we could be in for a very long wait while every 130 * EEPROM read fails 131 */ 132 status = wx_read_ee_hostif(wx, 0, &checksum); 133 if (status) { 134 wx_err(wx, "EEPROM read failed\n"); 135 return status; 136 } 137 138 checksum = 0; 139 status = txgbe_calc_eeprom_checksum(wx, &checksum); 140 if (status != 0) 141 return status; 142 143 status = wx_read_ee_hostif(wx, wx->eeprom.sw_region_offset + 144 TXGBE_EEPROM_CHECKSUM, &read_checksum); 145 if (status != 0) 146 return status; 147 148 /* Verify read checksum from EEPROM is the same as 149 * calculated checksum 150 */ 151 if (read_checksum != checksum) { 152 status = -EIO; 153 wx_err(wx, "Invalid EEPROM checksum\n"); 154 } 155 156 /* If the user cares, return the calculated checksum */ 157 if (checksum_val) 158 *checksum_val = checksum; 159 160 return status; 161 } 162 163 static void txgbe_reset_misc(struct wx *wx) 164 { 165 wx_reset_misc(wx); 166 txgbe_init_thermal_sensor_thresh(wx); 167 } 168 169 /** 170 * txgbe_reset_hw - Perform hardware reset 171 * @wx: pointer to wx structure 172 * 173 * Resets the hardware by resetting the transmit and receive units, masks 174 * and clears all interrupts, perform a PHY reset, and perform a link (MAC) 175 * reset. 176 **/ 177 int txgbe_reset_hw(struct wx *wx) 178 { 179 int status; 180 181 /* Call adapter stop to disable tx/rx and clear interrupts */ 182 status = wx_stop_adapter(wx); 183 if (status != 0) 184 return status; 185 186 if (wx->media_type != sp_media_copper) { 187 u32 val; 188 189 val = WX_MIS_RST_LAN_RST(wx->bus.func); 190 wr32(wx, WX_MIS_RST, val | rd32(wx, WX_MIS_RST)); 191 WX_WRITE_FLUSH(wx); 192 usleep_range(10, 100); 193 } 194 195 status = wx_check_flash_load(wx, TXGBE_SPI_ILDR_STATUS_LAN_SW_RST(wx->bus.func)); 196 if (status != 0) 197 return status; 198 199 txgbe_reset_misc(wx); 200 201 wx_clear_hw_cntrs(wx); 202 203 /* Store the permanent mac address */ 204 wx_get_mac_addr(wx, wx->mac.perm_addr); 205 206 /* Store MAC address from RAR0, clear receive address registers, and 207 * clear the multicast table. Also reset num_rar_entries to 128, 208 * since we modify this value when programming the SAN MAC address. 209 */ 210 wx->mac.num_rar_entries = TXGBE_SP_RAR_ENTRIES; 211 wx_init_rx_addrs(wx); 212 213 pci_set_master(wx->pdev); 214 215 return 0; 216 } 217