61b7a046e2
Since firmware does not use the semaphore between software and firmware.
Remove useless unilateral semaphore setting.
Fixes: 35c90ecccf ("net/txgbe: add EEPROM functions")
Cc: stable@dpdk.org
Signed-off-by: Jiawen Wu <jiawenwu@trustnetic.com>
460 lines
10 KiB
C
460 lines
10 KiB
C
/* SPDX-License-Identifier: BSD-3-Clause
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* Copyright(c) 2015-2020 Beijing WangXun Technology Co., Ltd.
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* Copyright(c) 2010-2017 Intel Corporation
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*/
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#include "txgbe_hw.h"
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#include "txgbe_mng.h"
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#include "txgbe_eeprom.h"
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/**
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* txgbe_init_eeprom_params - Initialize EEPROM params
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* @hw: pointer to hardware structure
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*
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* Initializes the EEPROM parameters txgbe_rom_info within the
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* txgbe_hw struct in order to set up EEPROM access.
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**/
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s32 txgbe_init_eeprom_params(struct txgbe_hw *hw)
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{
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struct txgbe_rom_info *eeprom = &hw->rom;
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u32 eec;
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u16 eeprom_size;
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int err = 0;
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if (eeprom->type != txgbe_eeprom_unknown)
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return 0;
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eeprom->type = txgbe_eeprom_none;
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/* Set default semaphore delay to 10ms which is a well
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* tested value
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*/
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eeprom->semaphore_delay = 10; /*ms*/
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/* Clear EEPROM page size, it will be initialized as needed */
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eeprom->word_page_size = 0;
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/*
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* Check for EEPROM present first.
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* If not present leave as none
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*/
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eec = rd32(hw, TXGBE_SPISTAT);
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if (!(eec & TXGBE_SPISTAT_BPFLASH)) {
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eeprom->type = txgbe_eeprom_flash;
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/*
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* SPI EEPROM is assumed here. This code would need to
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* change if a future EEPROM is not SPI.
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*/
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eeprom_size = 4096;
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eeprom->word_size = eeprom_size >> 1;
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}
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eeprom->address_bits = 16;
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err = eeprom->read32(hw, TXGBE_SW_REGION_PTR << 1, &eeprom->sw_addr);
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if (err) {
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DEBUGOUT("EEPROM read failed.");
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return err;
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}
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DEBUGOUT("eeprom params: type = %d, size = %d, address bits: %d %d",
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eeprom->type, eeprom->word_size,
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eeprom->address_bits, eeprom->sw_addr);
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return 0;
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}
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/**
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* txgbe_get_eeprom_semaphore - Get hardware semaphore
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* @hw: pointer to hardware structure
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*
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* Sets the hardware semaphores so EEPROM access can occur for bit-bang method
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**/
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s32 txgbe_get_eeprom_semaphore(struct txgbe_hw *hw)
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{
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s32 status = TXGBE_ERR_EEPROM;
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u32 timeout = 2000;
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u32 i;
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u32 swsm;
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/* Get SMBI software semaphore between device drivers first */
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for (i = 0; i < timeout; i++) {
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/*
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* If the SMBI bit is 0 when we read it, then the bit will be
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* set and we have the semaphore
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*/
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swsm = rd32(hw, TXGBE_SWSEM);
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if (!(swsm & TXGBE_SWSEM_PF)) {
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status = 0;
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break;
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}
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usec_delay(50);
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}
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if (i == timeout) {
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DEBUGOUT("Driver can't access the eeprom - SMBI Semaphore not granted.");
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/*
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* this release is particularly important because our attempts
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* above to get the semaphore may have succeeded, and if there
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* was a timeout, we should unconditionally clear the semaphore
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* bits to free the driver to make progress
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*/
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txgbe_release_eeprom_semaphore(hw);
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usec_delay(50);
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/*
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* one last try
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* If the SMBI bit is 0 when we read it, then the bit will be
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* set and we have the semaphore
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*/
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swsm = rd32(hw, TXGBE_SWSEM);
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if (!(swsm & TXGBE_SWSEM_PF))
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status = 0;
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}
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return status;
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}
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/**
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* txgbe_release_eeprom_semaphore - Release hardware semaphore
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* @hw: pointer to hardware structure
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*
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* This function clears hardware semaphore bits.
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**/
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void txgbe_release_eeprom_semaphore(struct txgbe_hw *hw)
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{
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wr32m(hw, TXGBE_SWSEM, TXGBE_SWSEM_PF, 0);
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txgbe_flush(hw);
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}
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/**
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* txgbe_ee_read - Read EEPROM word using a host interface cmd
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* @hw: pointer to hardware structure
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* @offset: offset of word in the EEPROM to read
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* @data: word read from the EEPROM
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*
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* Reads a 16 bit word from the EEPROM using the hostif.
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**/
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s32 txgbe_ee_read16(struct txgbe_hw *hw, u32 offset,
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u16 *data)
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{
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const u32 mask = TXGBE_MNGSEM_SWMBX | TXGBE_MNGSEM_SWFLASH;
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u32 addr = (offset << 1);
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int err;
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err = hw->mac.acquire_swfw_sync(hw, mask);
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if (err)
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return err;
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err = txgbe_hic_sr_read(hw, addr, (u8 *)data, 2);
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hw->mac.release_swfw_sync(hw, mask);
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return err;
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}
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/**
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* txgbe_ee_readw_buffer- Read EEPROM word(s) using hostif
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* @hw: pointer to hardware structure
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* @offset: offset of word in the EEPROM to read
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* @words: number of words
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* @data: word(s) read from the EEPROM
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*
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* Reads a 16 bit word(s) from the EEPROM using the hostif.
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**/
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s32 txgbe_ee_readw_buffer(struct txgbe_hw *hw,
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u32 offset, u32 words, void *data)
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{
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const u32 mask = TXGBE_MNGSEM_SWMBX | TXGBE_MNGSEM_SWFLASH;
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u32 addr = (offset << 1);
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u32 len = (words << 1);
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u8 *buf = (u8 *)data;
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int err;
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err = hw->mac.acquire_swfw_sync(hw, mask);
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if (err)
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return err;
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while (len) {
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u32 seg = (len <= TXGBE_PMMBX_DATA_SIZE
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? len : TXGBE_PMMBX_DATA_SIZE);
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err = txgbe_hic_sr_read(hw, addr, buf, seg);
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if (err)
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break;
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len -= seg;
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addr += seg;
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buf += seg;
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}
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hw->mac.release_swfw_sync(hw, mask);
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return err;
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}
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s32 txgbe_ee_readw_sw(struct txgbe_hw *hw, u32 offset,
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u16 *data)
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{
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const u32 mask = TXGBE_MNGSEM_SWMBX | TXGBE_MNGSEM_SWFLASH;
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u32 addr = hw->rom.sw_addr + (offset << 1);
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int err;
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err = hw->mac.acquire_swfw_sync(hw, mask);
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if (err)
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return err;
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err = txgbe_hic_sr_read(hw, addr, (u8 *)data, 2);
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hw->mac.release_swfw_sync(hw, mask);
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return err;
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}
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/**
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* txgbe_ee_read32 - Read EEPROM word using a host interface cmd
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* @hw: pointer to hardware structure
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* @offset: offset of word in the EEPROM to read
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* @data: word read from the EEPROM
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*
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* Reads a 32 bit word from the EEPROM using the hostif.
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**/
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s32 txgbe_ee_read32(struct txgbe_hw *hw, u32 addr, u32 *data)
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{
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const u32 mask = TXGBE_MNGSEM_SWMBX | TXGBE_MNGSEM_SWFLASH;
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int err;
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err = hw->mac.acquire_swfw_sync(hw, mask);
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if (err)
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return err;
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err = txgbe_hic_sr_read(hw, addr, (u8 *)data, 4);
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hw->mac.release_swfw_sync(hw, mask);
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return err;
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}
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/**
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* txgbe_ee_write - Write EEPROM word using hostif
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* @hw: pointer to hardware structure
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* @offset: offset of word in the EEPROM to write
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* @data: word write to the EEPROM
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*
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* Write a 16 bit word to the EEPROM using the hostif.
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**/
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s32 txgbe_ee_write16(struct txgbe_hw *hw, u32 offset,
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u16 data)
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{
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const u32 mask = TXGBE_MNGSEM_SWMBX | TXGBE_MNGSEM_SWFLASH;
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u32 addr = (offset << 1);
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int err;
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err = hw->mac.acquire_swfw_sync(hw, mask);
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if (err)
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return err;
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err = txgbe_hic_sr_write(hw, addr, (u8 *)&data, 2);
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hw->mac.release_swfw_sync(hw, mask);
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return err;
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}
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/**
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* txgbe_ee_writew_buffer - Write EEPROM word(s) using hostif
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* @hw: pointer to hardware structure
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* @offset: offset of word in the EEPROM to write
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* @words: number of words
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* @data: word(s) write to the EEPROM
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*
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* Write a 16 bit word(s) to the EEPROM using the hostif.
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**/
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s32 txgbe_ee_writew_buffer(struct txgbe_hw *hw,
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u32 offset, u32 words, void *data)
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{
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const u32 mask = TXGBE_MNGSEM_SWMBX | TXGBE_MNGSEM_SWFLASH;
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u32 addr = (offset << 1);
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u32 len = (words << 1);
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u8 *buf = (u8 *)data;
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int err;
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err = hw->mac.acquire_swfw_sync(hw, mask);
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if (err)
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return err;
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while (len) {
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u32 seg = (len <= TXGBE_PMMBX_DATA_SIZE
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? len : TXGBE_PMMBX_DATA_SIZE);
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err = txgbe_hic_sr_write(hw, addr, buf, seg);
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if (err)
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break;
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len -= seg;
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buf += seg;
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}
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hw->mac.release_swfw_sync(hw, mask);
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return err;
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}
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s32 txgbe_ee_writew_sw(struct txgbe_hw *hw, u32 offset,
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u16 data)
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{
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const u32 mask = TXGBE_MNGSEM_SWMBX | TXGBE_MNGSEM_SWFLASH;
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u32 addr = hw->rom.sw_addr + (offset << 1);
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int err;
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err = hw->mac.acquire_swfw_sync(hw, mask);
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if (err)
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return err;
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err = txgbe_hic_sr_write(hw, addr, (u8 *)&data, 2);
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hw->mac.release_swfw_sync(hw, mask);
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return err;
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}
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/**
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* txgbe_ee_write32 - Read EEPROM word using a host interface cmd
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* @hw: pointer to hardware structure
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* @offset: offset of word in the EEPROM to read
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* @data: word read from the EEPROM
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*
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* Reads a 32 bit word from the EEPROM using the hostif.
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**/
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s32 txgbe_ee_write32(struct txgbe_hw *hw, u32 addr, u32 data)
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{
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const u32 mask = TXGBE_MNGSEM_SWMBX | TXGBE_MNGSEM_SWFLASH;
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int err;
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err = hw->mac.acquire_swfw_sync(hw, mask);
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if (err)
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return err;
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err = txgbe_hic_sr_write(hw, addr, (u8 *)&data, 4);
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hw->mac.release_swfw_sync(hw, mask);
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return err;
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}
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/**
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* txgbe_calc_eeprom_checksum - Calculates and returns the checksum
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* @hw: pointer to hardware structure
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*
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* Returns a negative error code on error, or the 16-bit checksum
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**/
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#define BUFF_SIZE 64
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s32 txgbe_calc_eeprom_checksum(struct txgbe_hw *hw)
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{
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u16 checksum = 0, read_checksum = 0;
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int i, j, seg;
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int err;
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u16 buffer[BUFF_SIZE];
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err = hw->rom.readw_sw(hw, TXGBE_EEPROM_CHECKSUM, &read_checksum);
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if (err) {
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DEBUGOUT("EEPROM read failed");
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return err;
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}
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for (i = 0; i < TXGBE_EE_CSUM_MAX; i += seg) {
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seg = (i + BUFF_SIZE < TXGBE_EE_CSUM_MAX
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? BUFF_SIZE : TXGBE_EE_CSUM_MAX - i);
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err = hw->rom.readw_buffer(hw, i, seg, buffer);
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if (err)
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return err;
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for (j = 0; j < seg; j++)
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checksum += buffer[j];
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}
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checksum = (u16)TXGBE_EEPROM_SUM - checksum + read_checksum;
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return (s32)checksum;
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}
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/**
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* txgbe_validate_eeprom_checksum - Validate EEPROM checksum
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* @hw: pointer to hardware structure
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* @checksum_val: calculated checksum
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*
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* Performs checksum calculation and validates the EEPROM checksum. If the
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* caller does not need checksum_val, the value can be NULL.
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**/
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s32 txgbe_validate_eeprom_checksum(struct txgbe_hw *hw,
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u16 *checksum_val)
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{
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u16 checksum;
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u16 read_checksum = 0;
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int err;
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/* Read the first word from the EEPROM. If this times out or fails, do
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* not continue or we could be in for a very long wait while every
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* EEPROM read fails
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*/
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err = hw->rom.read16(hw, 0, &checksum);
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if (err) {
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DEBUGOUT("EEPROM read failed");
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return err;
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}
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err = hw->rom.calc_checksum(hw);
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if (err < 0)
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return err;
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checksum = (u16)(err & 0xffff);
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err = hw->rom.readw_sw(hw, TXGBE_EEPROM_CHECKSUM, &read_checksum);
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if (err) {
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DEBUGOUT("EEPROM read failed");
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return err;
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}
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/* Verify read checksum from EEPROM is the same as
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* calculated checksum
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*/
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if (read_checksum != checksum) {
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err = TXGBE_ERR_EEPROM_CHECKSUM;
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DEBUGOUT("EEPROM checksum error");
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}
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/* If the user cares, return the calculated checksum */
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if (checksum_val)
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*checksum_val = checksum;
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return err;
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}
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/**
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* txgbe_update_eeprom_checksum - Updates the EEPROM checksum
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* @hw: pointer to hardware structure
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**/
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s32 txgbe_update_eeprom_checksum(struct txgbe_hw *hw)
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{
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s32 status;
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u16 checksum;
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/* Read the first word from the EEPROM. If this times out or fails, do
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* not continue or we could be in for a very long wait while every
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* EEPROM read fails
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*/
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status = hw->rom.read16(hw, 0, &checksum);
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if (status) {
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DEBUGOUT("EEPROM read failed");
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return status;
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}
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status = hw->rom.calc_checksum(hw);
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if (status < 0)
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return status;
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checksum = (u16)(status & 0xffff);
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status = hw->rom.writew_sw(hw, TXGBE_EEPROM_CHECKSUM, checksum);
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return status;
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}
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