// SPDX-License-Identifier: GPL-2.0
/* Copyright (c) 2015 - 2022 Beijing WangXun Technology Co., Ltd. */
#include <linux/etherdevice.h>
#include <linux/if_ether.h>
#include <linux/string.h>
#include <linux/iopoll.h>
#include <linux/types.h>
#include <linux/pci.h>
#include "../libwx/wx_type.h"
#include "../libwx/wx_hw.h"
#include "txgbe_type.h"
#include "txgbe_hw.h"
/**
* txgbe_disable_sec_tx_path - Stops the transmit data path
* @wx: pointer to hardware structure
*
* Stops the transmit data path and waits for the HW to internally empty
* the tx security block
**/
int txgbe_disable_sec_tx_path(struct wx *wx)
{
int val;
wr32m(wx, WX_TSC_CTL, WX_TSC_CTL_TX_DIS, WX_TSC_CTL_TX_DIS);
return read_poll_timeout(rd32, val, val & WX_TSC_ST_SECTX_RDY,
1000, 20000, false, wx, WX_TSC_ST);
}
/**
* txgbe_enable_sec_tx_path - Enables the transmit data path
* @wx: pointer to hardware structure
*
* Enables the transmit data path.
**/
void txgbe_enable_sec_tx_path(struct wx *wx)
{
wr32m(wx, WX_TSC_CTL, WX_TSC_CTL_TX_DIS, 0);
WX_WRITE_FLUSH(wx);
}
/**
* txgbe_init_thermal_sensor_thresh - Inits thermal sensor thresholds
* @wx: pointer to hardware structure
*
* Inits the thermal sensor thresholds according to the NVM map
* and save off the threshold and location values into mac.thermal_sensor_data
**/
static void txgbe_init_thermal_sensor_thresh(struct wx *wx)
{
struct wx_thermal_sensor_data *data = &wx->mac.sensor;
memset(data, 0, sizeof(struct wx_thermal_sensor_data));
/* Only support thermal sensors attached to SP physical port 0 */
if (wx->bus.func)
return;
wr32(wx, TXGBE_TS_CTL, TXGBE_TS_CTL_EVAL_MD);
wr32(wx, WX_TS_INT_EN,
WX_TS_INT_EN_ALARM_INT_EN | WX_TS_INT_EN_DALARM_INT_EN);
wr32(wx, WX_TS_EN, WX_TS_EN_ENA);
data->alarm_thresh = 100;
wr32(wx, WX_TS_ALARM_THRE, 677);
data->dalarm_thresh = 90;
wr32(wx, WX_TS_DALARM_THRE, 614);
}
/**
* txgbe_calc_eeprom_checksum - Calculates and returns the checksum
* @wx: pointer to hardware structure
* @checksum: pointer to cheksum
*
* Returns a negative error code on error
**/
static int txgbe_calc_eeprom_checksum(struct wx *wx, u16 *checksum)
{
u16 *eeprom_ptrs = NULL;
u16 *local_buffer;
int status;
u16 i;
wx_init_eeprom_params(wx);
eeprom_ptrs = kvmalloc_array(TXGBE_EEPROM_LAST_WORD, sizeof(u16),
GFP_KERNEL);
if (!eeprom_ptrs)
return -ENOMEM;
/* Read pointer area */
status = wx_read_ee_hostif_buffer(wx, 0, TXGBE_EEPROM_LAST_WORD, eeprom_ptrs);
if (status != 0) {
wx_err(wx, "Failed to read EEPROM image\n");
kvfree(eeprom_ptrs);
return status;
}
local_buffer = eeprom_ptrs;
for (i = 0; i < TXGBE_EEPROM_LAST_WORD; i++)
if (i != wx->eeprom.sw_region_offset + TXGBE_EEPROM_CHECKSUM)
*checksum += local_buffer[i];
kvfree(eeprom_ptrs);
*checksum = TXGBE_EEPROM_SUM - *checksum;
return 0;
}
/**
* txgbe_validate_eeprom_checksum - Validate EEPROM checksum
* @wx: pointer to hardware structure
* @checksum_val: calculated checksum
*
* Performs checksum calculation and validates the EEPROM checksum. If the
* caller does not need checksum_val, the value can be NULL.
**/
int txgbe_validate_eeprom_checksum(struct wx *wx, u16 *checksum_val)
{
u16 read_checksum = 0;
u16 checksum;
int status;
/* Read the first word from the EEPROM. If this times out or fails, do
* not continue or we could be in for a very long wait while every
* EEPROM read fails
*/
status = wx_read_ee_hostif(wx, 0, &checksum);
if (status) {
wx_err(wx, "EEPROM read failed\n");
return status;
}
checksum = 0;
status = txgbe_calc_eeprom_checksum(wx, &checksum);
if (status != 0)
return status;
status = wx_read_ee_hostif(wx, wx->eeprom.sw_region_offset +
TXGBE_EEPROM_CHECKSUM, &read_checksum);
if (status != 0)
return status;
/* Verify read checksum from EEPROM is the same as
* calculated checksum
*/
if (read_checksum != checksum) {
status = -EIO;
wx_err(wx, "Invalid EEPROM checksum\n");
}
/* If the user cares, return the calculated checksum */
if (checksum_val)
*checksum_val = checksum;
return status;
}
static void txgbe_reset_misc(struct wx *wx)
{
wx_reset_misc(wx);
txgbe_init_thermal_sensor_thresh(wx);
}
/**
* txgbe_reset_hw - Perform hardware reset
* @wx: pointer to wx structure
*
* Resets the hardware by resetting the transmit and receive units, masks
* and clears all interrupts, perform a PHY reset, and perform a link (MAC)
* reset.
**/
int txgbe_reset_hw(struct wx *wx)
{
int status;
/* Call adapter stop to disable tx/rx and clear interrupts */
status = wx_stop_adapter(wx);
if (status != 0)
return status;
if (wx->media_type != sp_media_copper) {
u32 val;
val = WX_MIS_RST_LAN_RST(wx->bus.func);
wr32(wx, WX_MIS_RST, val | rd32(wx, WX_MIS_RST));
WX_WRITE_FLUSH(wx);
usleep_range(10, 100);
}
status = wx_check_flash_load(wx, TXGBE_SPI_ILDR_STATUS_LAN_SW_RST(wx->bus.func));
if (status != 0)
return status;
txgbe_reset_misc(wx);
wx_clear_hw_cntrs(wx);
/* Store the permanent mac address */
wx_get_mac_addr(wx, wx->mac.perm_addr);
/* Store MAC address from RAR0, clear receive address registers, and
* clear the multicast table. Also reset num_rar_entries to 128,
* since we modify this value when programming the SAN MAC address.
*/
wx->mac.num_rar_entries = TXGBE_SP_RAR_ENTRIES;
wx_init_rx_addrs(wx);
pci_set_master(wx->pdev);
return 0;
}
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