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// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
/* Copyright (c) 2018 Mellanox Technologies. All rights reserved */
#include <linux/kernel.h>
#include <linux/err.h>
#include <linux/sfp.h>
#include "core.h"
#include "core_env.h"
#include "item.h"
#include "reg.h"
static int mlxsw_env_validate_cable_ident(struct mlxsw_core *core, int id,
bool *qsfp, bool *cmis)
{
char eeprom_tmp[MLXSW_REG_MCIA_EEPROM_SIZE];
char mcia_pl[MLXSW_REG_MCIA_LEN];
u8 ident;
int err;
mlxsw_reg_mcia_pack(mcia_pl, id, 0, MLXSW_REG_MCIA_PAGE0_LO_OFF, 0, 1,
MLXSW_REG_MCIA_I2C_ADDR_LOW);
err = mlxsw_reg_query(core, MLXSW_REG(mcia), mcia_pl);
if (err)
return err;
mlxsw_reg_mcia_eeprom_memcpy_from(mcia_pl, eeprom_tmp);
ident = eeprom_tmp[0];
*cmis = false;
switch (ident) {
case MLXSW_REG_MCIA_EEPROM_MODULE_INFO_ID_SFP:
*qsfp = false;
break;
case MLXSW_REG_MCIA_EEPROM_MODULE_INFO_ID_QSFP:
case MLXSW_REG_MCIA_EEPROM_MODULE_INFO_ID_QSFP_PLUS:
case MLXSW_REG_MCIA_EEPROM_MODULE_INFO_ID_QSFP28:
*qsfp = true;
break;
case MLXSW_REG_MCIA_EEPROM_MODULE_INFO_ID_QSFP_DD:
*qsfp = true;
*cmis = true;
break;
default:
return -EINVAL;
}
return 0;
}
static int
mlxsw_env_query_module_eeprom(struct mlxsw_core *mlxsw_core, int module,
u16 offset, u16 size, void *data,
bool qsfp, unsigned int *p_read_size)
{
char eeprom_tmp[MLXSW_REG_MCIA_EEPROM_SIZE];
char mcia_pl[MLXSW_REG_MCIA_LEN];
u16 i2c_addr;
u8 page = 0;
int status;
int err;
/* MCIA register accepts buffer size <= 48. Page of size 128 should be
* read by chunks of size 48, 48, 32. Align the size of the last chunk
* to avoid reading after the end of the page.
*/
size = min_t(u16, size, MLXSW_REG_MCIA_EEPROM_SIZE);
if (offset < MLXSW_REG_MCIA_EEPROM_PAGE_LENGTH &&
offset + size > MLXSW_REG_MCIA_EEPROM_PAGE_LENGTH)
/* Cross pages read, read until offset 256 in low page */
size = MLXSW_REG_MCIA_EEPROM_PAGE_LENGTH - offset;
i2c_addr = MLXSW_REG_MCIA_I2C_ADDR_LOW;
if (offset >= MLXSW_REG_MCIA_EEPROM_PAGE_LENGTH) {
if (qsfp) {
/* When reading upper pages 1, 2 and 3 the offset
* starts at 128. Please refer to "QSFP+ Memory Map"
* figure in SFF-8436 specification and to "CMIS Module
* Memory Map" figure in CMIS specification for
* graphical depiction.
*/
page = MLXSW_REG_MCIA_PAGE_GET(offset);
offset -= MLXSW_REG_MCIA_EEPROM_UP_PAGE_LENGTH * page;
if (offset + size > MLXSW_REG_MCIA_EEPROM_PAGE_LENGTH)
size = MLXSW_REG_MCIA_EEPROM_PAGE_LENGTH - offset;
} else {
/* When reading upper pages 1, 2 and 3 the offset
* starts at 0 and I2C high address is used. Please refer
* refer to "Memory Organization" figure in SFF-8472
* specification for graphical depiction.
*/
i2c_addr = MLXSW_REG_MCIA_I2C_ADDR_HIGH;
offset -= MLXSW_REG_MCIA_EEPROM_PAGE_LENGTH;
}
}
mlxsw_reg_mcia_pack(mcia_pl, module, 0, page, offset, size, i2c_addr);
err = mlxsw_reg_query(mlxsw_core, MLXSW_REG(mcia), mcia_pl);
if (err)
return err;
status = mlxsw_reg_mcia_status_get(mcia_pl);
if (status)
return -EIO;
mlxsw_reg_mcia_eeprom_memcpy_from(mcia_pl, eeprom_tmp);
memcpy(data, eeprom_tmp, size);
*p_read_size = size;
return 0;
}
int mlxsw_env_module_temp_thresholds_get(struct mlxsw_core *core, int module,
int off, int *temp)
{
char eeprom_tmp[MLXSW_REG_MCIA_EEPROM_SIZE];
union {
u8 buf[MLXSW_REG_MCIA_TH_ITEM_SIZE];
u16 temp;
} temp_thresh;
char mcia_pl[MLXSW_REG_MCIA_LEN] = {0};
char mtmp_pl[MLXSW_REG_MTMP_LEN];
unsigned int module_temp;
bool qsfp, cmis;
int page;
int err;
mlxsw_reg_mtmp_pack(mtmp_pl, MLXSW_REG_MTMP_MODULE_INDEX_MIN + module,
false, false);
err = mlxsw_reg_query(core, MLXSW_REG(mtmp), mtmp_pl);
if (err)
return err;
mlxsw_reg_mtmp_unpack(mtmp_pl, &module_temp, NULL, NULL);
if (!module_temp) {
*temp = 0;
return 0;
}
/* Read Free Side Device Temperature Thresholds from page 03h
* (MSB at lower byte address).
* Bytes:
* 128-129 - Temp High Alarm (SFP_TEMP_HIGH_ALARM);
* 130-131 - Temp Low Alarm (SFP_TEMP_LOW_ALARM);
* 132-133 - Temp High Warning (SFP_TEMP_HIGH_WARN);
* 134-135 - Temp Low Warning (SFP_TEMP_LOW_WARN);
*/
/* Validate module identifier value. */
err = mlxsw_env_validate_cable_ident(core, module, &qsfp, &cmis);
if (err)
return err;
if (qsfp) {
/* For QSFP/CMIS module-defined thresholds are located in page
* 02h, otherwise in page 03h.
*/
if (cmis)
page = MLXSW_REG_MCIA_TH_PAGE_CMIS_NUM;
else
page = MLXSW_REG_MCIA_TH_PAGE_NUM;
mlxsw_reg_mcia_pack(mcia_pl, module, 0, page,
MLXSW_REG_MCIA_TH_PAGE_OFF + off,
MLXSW_REG_MCIA_TH_ITEM_SIZE,
MLXSW_REG_MCIA_I2C_ADDR_LOW);
} else {
mlxsw_reg_mcia_pack(mcia_pl, module, 0,
MLXSW_REG_MCIA_PAGE0_LO,
off, MLXSW_REG_MCIA_TH_ITEM_SIZE,
MLXSW_REG_MCIA_I2C_ADDR_HIGH);
}
err = mlxsw_reg_query(core, MLXSW_REG(mcia), mcia_pl);
if (err)
return err;
mlxsw_reg_mcia_eeprom_memcpy_from(mcia_pl, eeprom_tmp);
memcpy(temp_thresh.buf, eeprom_tmp, MLXSW_REG_MCIA_TH_ITEM_SIZE);
*temp = temp_thresh.temp * 1000;
return 0;
}
int mlxsw_env_get_module_info(struct mlxsw_core *mlxsw_core, int module,
struct ethtool_modinfo *modinfo)
{
u8 module_info[MLXSW_REG_MCIA_EEPROM_MODULE_INFO_SIZE];
u16 offset = MLXSW_REG_MCIA_EEPROM_MODULE_INFO_SIZE;
u8 module_rev_id, module_id, diag_mon;
unsigned int read_size;
int err;
err = mlxsw_env_query_module_eeprom(mlxsw_core, module, 0, offset,
module_info, false, &read_size);
if (err)
return err;
if (read_size < offset)
return -EIO;
module_rev_id = module_info[MLXSW_REG_MCIA_EEPROM_MODULE_INFO_REV_ID];
module_id = module_info[MLXSW_REG_MCIA_EEPROM_MODULE_INFO_ID];
switch (module_id) {
case MLXSW_REG_MCIA_EEPROM_MODULE_INFO_ID_QSFP:
modinfo->type = ETH_MODULE_SFF_8436;
modinfo->eeprom_len = ETH_MODULE_SFF_8436_MAX_LEN;
break;
case MLXSW_REG_MCIA_EEPROM_MODULE_INFO_ID_QSFP_PLUS:
case MLXSW_REG_MCIA_EEPROM_MODULE_INFO_ID_QSFP28:
if (module_id == MLXSW_REG_MCIA_EEPROM_MODULE_INFO_ID_QSFP28 ||
module_rev_id >=
MLXSW_REG_MCIA_EEPROM_MODULE_INFO_REV_ID_8636) {
modinfo->type = ETH_MODULE_SFF_8636;
modinfo->eeprom_len = ETH_MODULE_SFF_8636_MAX_LEN;
} else {
modinfo->type = ETH_MODULE_SFF_8436;
modinfo->eeprom_len = ETH_MODULE_SFF_8436_MAX_LEN;
}
break;
case MLXSW_REG_MCIA_EEPROM_MODULE_INFO_ID_SFP:
/* Verify if transceiver provides diagnostic monitoring page */
err = mlxsw_env_query_module_eeprom(mlxsw_core, module,
SFP_DIAGMON, 1, &diag_mon,
false, &read_size);
if (err)
return err;
if (read_size < 1)
return -EIO;
modinfo->type = ETH_MODULE_SFF_8472;
if (diag_mon)
modinfo->eeprom_len = ETH_MODULE_SFF_8472_LEN;
else
modinfo->eeprom_len = ETH_MODULE_SFF_8472_LEN / 2;
break;
case MLXSW_REG_MCIA_EEPROM_MODULE_INFO_ID_QSFP_DD:
/* Use SFF_8636 as base type. ethtool should recognize specific
* type through the identifier value.
*/
modinfo->type = ETH_MODULE_SFF_8636;
/* Verify if module EEPROM is a flat memory. In case of flat
* memory only page 00h (0-255 bytes) can be read. Otherwise
* upper pages 01h and 02h can also be read. Upper pages 10h
* and 11h are currently not supported by the driver.
*/
if (module_info[MLXSW_REG_MCIA_EEPROM_MODULE_INFO_TYPE_ID] &
MLXSW_REG_MCIA_EEPROM_CMIS_FLAT_MEMORY)
modinfo->eeprom_len = ETH_MODULE_SFF_8636_LEN;
else
modinfo->eeprom_len = ETH_MODULE_SFF_8472_LEN;
break;
default:
return -EINVAL;
}
return 0;
}
EXPORT_SYMBOL(mlxsw_env_get_module_info);
int mlxsw_env_get_module_eeprom(struct net_device *netdev,
struct mlxsw_core *mlxsw_core, int module,
struct ethtool_eeprom *ee, u8 *data)
{
int offset = ee->offset;
unsigned int read_size;
bool qsfp, cmis;
int i = 0;
int err;
if (!ee->len)
return -EINVAL;
memset(data, 0, ee->len);
/* Validate module identifier value. */
err = mlxsw_env_validate_cable_ident(mlxsw_core, module, &qsfp, &cmis);
if (err)
return err;
while (i < ee->len) {
err = mlxsw_env_query_module_eeprom(mlxsw_core, module, offset,
ee->len - i, data + i,
qsfp, &read_size);
if (err) {
netdev_err(netdev, "Eeprom query failed\n");
return err;
}
i += read_size;
offset += read_size;
}
return 0;
}
EXPORT_SYMBOL(mlxsw_env_get_module_eeprom);
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