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1// SPDX-License-Identifier: GPL-2.02/* 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 path18 * @wx: pointer to hardware structure19 *20 * Stops the transmit data path and waits for the HW to internally empty21 * the tx security block22 **/23int 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 path34 * @wx: pointer to hardware structure35 *36 * Enables the transmit data path.37 **/38void 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 thresholds46 * @wx: pointer to hardware structure47 *48 * Inits the thermal sensor thresholds according to the NVM map49 * and save off the threshold and location values into mac.thermal_sensor_data50 **/51static 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 checksum75 * @wx: pointer to hardware structure76 * @checksum: pointer to cheksum77 *78 * Returns a negative error code on error79 **/80static 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 kvfree(eeprom_ptrs);107 108 *checksum = TXGBE_EEPROM_SUM - *checksum;109 110 return 0;111}112 113/**114 * txgbe_validate_eeprom_checksum - Validate EEPROM checksum115 * @wx: pointer to hardware structure116 * @checksum_val: calculated checksum117 *118 * Performs checksum calculation and validates the EEPROM checksum. If the119 * caller does not need checksum_val, the value can be NULL.120 **/121int txgbe_validate_eeprom_checksum(struct wx *wx, u16 *checksum_val)122{123 u16 read_checksum = 0;124 u16 checksum;125 int status;126 127 /* Read the first word from the EEPROM. If this times out or fails, do128 * not continue or we could be in for a very long wait while every129 * EEPROM read fails130 */131 status = wx_read_ee_hostif(wx, 0, &checksum);132 if (status) {133 wx_err(wx, "EEPROM read failed\n");134 return status;135 }136 137 checksum = 0;138 status = txgbe_calc_eeprom_checksum(wx, &checksum);139 if (status != 0)140 return status;141 142 status = wx_read_ee_hostif(wx, wx->eeprom.sw_region_offset +143 TXGBE_EEPROM_CHECKSUM, &read_checksum);144 if (status != 0)145 return status;146 147 /* Verify read checksum from EEPROM is the same as148 * calculated checksum149 */150 if (read_checksum != checksum) {151 status = -EIO;152 wx_err(wx, "Invalid EEPROM checksum\n");153 }154 155 /* If the user cares, return the calculated checksum */156 if (checksum_val)157 *checksum_val = checksum;158 159 return status;160}161 162static void txgbe_reset_misc(struct wx *wx)163{164 wx_reset_misc(wx);165 txgbe_init_thermal_sensor_thresh(wx);166}167 168/**169 * txgbe_reset_hw - Perform hardware reset170 * @wx: pointer to wx structure171 *172 * Resets the hardware by resetting the transmit and receive units, masks173 * and clears all interrupts, perform a PHY reset, and perform a link (MAC)174 * reset.175 **/176int txgbe_reset_hw(struct wx *wx)177{178 int status;179 180 /* Call adapter stop to disable tx/rx and clear interrupts */181 status = wx_stop_adapter(wx);182 if (status != 0)183 return status;184 185 if (wx->media_type != sp_media_copper) {186 u32 val;187 188 val = WX_MIS_RST_LAN_RST(wx->bus.func);189 wr32(wx, WX_MIS_RST, val | rd32(wx, WX_MIS_RST));190 WX_WRITE_FLUSH(wx);191 usleep_range(10, 100);192 }193 194 status = wx_check_flash_load(wx, TXGBE_SPI_ILDR_STATUS_LAN_SW_RST(wx->bus.func));195 if (status != 0)196 return status;197 198 txgbe_reset_misc(wx);199 200 wx_clear_hw_cntrs(wx);201 202 /* Store the permanent mac address */203 wx_get_mac_addr(wx, wx->mac.perm_addr);204 205 /* Store MAC address from RAR0, clear receive address registers, and206 * clear the multicast table. Also reset num_rar_entries to 128,207 * since we modify this value when programming the SAN MAC address.208 */209 wx->mac.num_rar_entries = TXGBE_SP_RAR_ENTRIES;210 wx_init_rx_addrs(wx);211 212 pci_set_master(wx->pdev);213 214 return 0;215}216