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linux-stable/drivers/net/ethernet/mellanox/mlxsw/core_env.c

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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/ethtool.h>
#include <linux/sfp.h>
#include <linux/mutex.h>
#include "core.h"
#include "core_env.h"
#include "item.h"
#include "reg.h"
struct mlxsw_env_module_info {
u64 module_overheat_counter;
bool is_overheat;
int num_ports_mapped;
int num_ports_up;
enum ethtool_module_power_mode_policy power_mode_policy;
enum mlxsw_reg_pmtm_module_type type;
};
struct mlxsw_env_line_card {
u8 module_count;
bool active;
struct mlxsw_env_module_info module_info[];
};
struct mlxsw_env {
struct mlxsw_core *core;
const struct mlxsw_bus_info *bus_info;
u8 max_module_count; /* Maximum number of modules per-slot. */
u8 num_of_slots; /* Including the main board. */
u8 max_eeprom_len; /* Maximum module EEPROM transaction length. */
struct mutex line_cards_lock; /* Protects line cards. */
struct mlxsw_env_line_card *line_cards[];
};
static bool __mlxsw_env_linecard_is_active(struct mlxsw_env *mlxsw_env,
u8 slot_index)
{
return mlxsw_env->line_cards[slot_index]->active;
}
static bool mlxsw_env_linecard_is_active(struct mlxsw_env *mlxsw_env,
u8 slot_index)
{
bool active;
mutex_lock(&mlxsw_env->line_cards_lock);
active = __mlxsw_env_linecard_is_active(mlxsw_env, slot_index);
mutex_unlock(&mlxsw_env->line_cards_lock);
return active;
}
static struct
mlxsw_env_module_info *mlxsw_env_module_info_get(struct mlxsw_core *mlxsw_core,
u8 slot_index, u8 module)
{
struct mlxsw_env *mlxsw_env = mlxsw_core_env(mlxsw_core);
return &mlxsw_env->line_cards[slot_index]->module_info[module];
}
static int __mlxsw_env_validate_module_type(struct mlxsw_core *core,
u8 slot_index, u8 module)
{
struct mlxsw_env *mlxsw_env = mlxsw_core_env(core);
struct mlxsw_env_module_info *module_info;
int err;
if (!__mlxsw_env_linecard_is_active(mlxsw_env, slot_index))
return 0;
module_info = mlxsw_env_module_info_get(core, slot_index, module);
switch (module_info->type) {
case MLXSW_REG_PMTM_MODULE_TYPE_TWISTED_PAIR:
err = -EINVAL;
break;
default:
err = 0;
}
return err;
}
static int mlxsw_env_validate_module_type(struct mlxsw_core *core,
u8 slot_index, u8 module)
{
struct mlxsw_env *mlxsw_env = mlxsw_core_env(core);
int err;
mutex_lock(&mlxsw_env->line_cards_lock);
err = __mlxsw_env_validate_module_type(core, slot_index, module);
mutex_unlock(&mlxsw_env->line_cards_lock);
return err;
}
static int
mlxsw_env_validate_cable_ident(struct mlxsw_core *core, u8 slot_index, int id,
bool *qsfp, bool *cmis)
{
char mcia_pl[MLXSW_REG_MCIA_LEN];
char *eeprom_tmp;
u8 ident;
int err;
err = mlxsw_env_validate_module_type(core, slot_index, id);
if (err)
return err;
mlxsw_reg_mcia_pack(mcia_pl, slot_index, id,
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;
eeprom_tmp = mlxsw_reg_mcia_eeprom_data(mcia_pl);
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:
case MLXSW_REG_MCIA_EEPROM_MODULE_INFO_ID_OSFP:
*qsfp = true;
*cmis = true;
break;
default:
return -EINVAL;
}
return 0;
}
static int
mlxsw_env_query_module_eeprom(struct mlxsw_core *mlxsw_core, u8 slot_index,
int module, u16 offset, u16 size, void *data,
bool qsfp, unsigned int *p_read_size)
{
struct mlxsw_env *mlxsw_env = mlxsw_core_env(mlxsw_core);
char mcia_pl[MLXSW_REG_MCIA_LEN];
char *eeprom_tmp;
u16 i2c_addr;
u8 page = 0;
int status;
int err;
size = min_t(u16, size, mlxsw_env->max_eeprom_len);
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
* 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, slot_index, module, 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;
eeprom_tmp = mlxsw_reg_mcia_eeprom_data(mcia_pl);
memcpy(data, eeprom_tmp, size);
*p_read_size = size;
return 0;
}
int
mlxsw_env_module_temp_thresholds_get(struct mlxsw_core *core, u8 slot_index,
int module, int off, int *temp)
{
unsigned int module_temp, module_crit, module_emerg;
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];
char *eeprom_tmp;
bool qsfp, cmis;
int page;
int err;
mlxsw_reg_mtmp_pack(mtmp_pl, slot_index,
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, &module_crit,
&module_emerg, NULL);
if (!module_temp) {
*temp = 0;
return 0;
}
/* Validate if threshold reading is available through MTMP register,
* otherwise fallback to read through MCIA.
*/
if (module_emerg) {
*temp = off == SFP_TEMP_HIGH_WARN ? module_crit : module_emerg;
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, slot_index, 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, slot_index, module, 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, slot_index, module,
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;
eeprom_tmp = mlxsw_reg_mcia_eeprom_data(mcia_pl);
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 net_device *netdev,
struct mlxsw_core *mlxsw_core, u8 slot_index,
int module, struct ethtool_modinfo *modinfo)
{
struct mlxsw_env *mlxsw_env = mlxsw_core_env(mlxsw_core);
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;
if (!mlxsw_env_linecard_is_active(mlxsw_env, slot_index)) {
netdev_err(netdev, "Cannot read EEPROM of module on an inactive line card\n");
return -EIO;
}
err = mlxsw_env_validate_module_type(mlxsw_core, slot_index, module);
if (err) {
netdev_err(netdev,
"EEPROM is not equipped on port module type");
return err;
}
err = mlxsw_env_query_module_eeprom(mlxsw_core, slot_index, 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, slot_index,
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:
case MLXSW_REG_MCIA_EEPROM_MODULE_INFO_ID_OSFP:
/* 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, u8 slot_index,
int module, struct ethtool_eeprom *ee,
u8 *data)
{
struct mlxsw_env *mlxsw_env = mlxsw_core_env(mlxsw_core);
int offset = ee->offset;
unsigned int read_size;
bool qsfp, cmis;
int i = 0;
int err;
if (!ee->len)
return -EINVAL;
if (!mlxsw_env_linecard_is_active(mlxsw_env, slot_index)) {
netdev_err(netdev, "Cannot read EEPROM of module on an inactive line card\n");
return -EIO;
}
memset(data, 0, ee->len);
/* Validate module identifier value. */
err = mlxsw_env_validate_cable_ident(mlxsw_core, slot_index, module,
&qsfp, &cmis);
if (err)
return err;
while (i < ee->len) {
err = mlxsw_env_query_module_eeprom(mlxsw_core, slot_index,
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);
static int mlxsw_env_mcia_status_process(const char *mcia_pl,
struct netlink_ext_ack *extack)
{
u8 status = mlxsw_reg_mcia_status_get(mcia_pl);
switch (status) {
case MLXSW_REG_MCIA_STATUS_GOOD:
return 0;
case MLXSW_REG_MCIA_STATUS_NO_EEPROM_MODULE:
NL_SET_ERR_MSG_MOD(extack, "No response from module's EEPROM");
return -EIO;
case MLXSW_REG_MCIA_STATUS_MODULE_NOT_SUPPORTED:
NL_SET_ERR_MSG_MOD(extack, "Module type not supported by the device");
return -EOPNOTSUPP;
case MLXSW_REG_MCIA_STATUS_MODULE_NOT_CONNECTED:
NL_SET_ERR_MSG_MOD(extack, "No module present indication");
return -EIO;
case MLXSW_REG_MCIA_STATUS_I2C_ERROR:
NL_SET_ERR_MSG_MOD(extack, "Error occurred while trying to access module's EEPROM using I2C");
return -EIO;
case MLXSW_REG_MCIA_STATUS_MODULE_DISABLED:
NL_SET_ERR_MSG_MOD(extack, "Module is disabled");
return -EIO;
default:
NL_SET_ERR_MSG_MOD(extack, "Unknown error");
return -EIO;
}
}
int
mlxsw_env_get_module_eeprom_by_page(struct mlxsw_core *mlxsw_core,
u8 slot_index, u8 module,
const struct ethtool_module_eeprom *page,
struct netlink_ext_ack *extack)
{
struct mlxsw_env *mlxsw_env = mlxsw_core_env(mlxsw_core);
u32 bytes_read = 0;
u16 device_addr;
int err;
if (!mlxsw_env_linecard_is_active(mlxsw_env, slot_index)) {
NL_SET_ERR_MSG_MOD(extack,
"Cannot read EEPROM of module on an inactive line card");
return -EIO;
}
err = mlxsw_env_validate_module_type(mlxsw_core, slot_index, module);
if (err) {
NL_SET_ERR_MSG_MOD(extack, "EEPROM is not equipped on port module type");
return err;
}
/* Offset cannot be larger than 2 * ETH_MODULE_EEPROM_PAGE_LEN */
device_addr = page->offset;
while (bytes_read < page->length) {
char mcia_pl[MLXSW_REG_MCIA_LEN];
char *eeprom_tmp;
u8 size;
size = min_t(u8, page->length - bytes_read,
mlxsw_env->max_eeprom_len);
mlxsw_reg_mcia_pack(mcia_pl, slot_index, module, page->page,
device_addr + bytes_read, size,
page->i2c_address);
mlxsw_reg_mcia_bank_number_set(mcia_pl, page->bank);
err = mlxsw_reg_query(mlxsw_core, MLXSW_REG(mcia), mcia_pl);
if (err) {
NL_SET_ERR_MSG_MOD(extack, "Failed to access module's EEPROM");
return err;
}
err = mlxsw_env_mcia_status_process(mcia_pl, extack);
if (err)
return err;
eeprom_tmp = mlxsw_reg_mcia_eeprom_data(mcia_pl);
memcpy(page->data + bytes_read, eeprom_tmp, size);
bytes_read += size;
}
return bytes_read;
}
EXPORT_SYMBOL(mlxsw_env_get_module_eeprom_by_page);
static int mlxsw_env_module_reset(struct mlxsw_core *mlxsw_core, u8 slot_index,
u8 module)
{
char pmaos_pl[MLXSW_REG_PMAOS_LEN];
mlxsw_reg_pmaos_pack(pmaos_pl, slot_index, module);
mlxsw_reg_pmaos_rst_set(pmaos_pl, true);
return mlxsw_reg_write(mlxsw_core, MLXSW_REG(pmaos), pmaos_pl);
}
int mlxsw_env_reset_module(struct net_device *netdev,
struct mlxsw_core *mlxsw_core, u8 slot_index,
u8 module, u32 *flags)
{
struct mlxsw_env *mlxsw_env = mlxsw_core_env(mlxsw_core);
struct mlxsw_env_module_info *module_info;
u32 req = *flags;
int err;
if (!(req & ETH_RESET_PHY) &&
!(req & (ETH_RESET_PHY << ETH_RESET_SHARED_SHIFT)))
return 0;
if (!mlxsw_env_linecard_is_active(mlxsw_env, slot_index)) {
netdev_err(netdev, "Cannot reset module on an inactive line card\n");
return -EIO;
}
mutex_lock(&mlxsw_env->line_cards_lock);
err = __mlxsw_env_validate_module_type(mlxsw_core, slot_index, module);
if (err) {
netdev_err(netdev, "Reset module is not supported on port module type\n");
goto out;
}
module_info = mlxsw_env_module_info_get(mlxsw_core, slot_index, module);
if (module_info->num_ports_up) {
netdev_err(netdev, "Cannot reset module when ports using it are administratively up\n");
err = -EINVAL;
goto out;
}
if (module_info->num_ports_mapped > 1 &&
!(req & (ETH_RESET_PHY << ETH_RESET_SHARED_SHIFT))) {
netdev_err(netdev, "Cannot reset module without \"phy-shared\" flag when shared by multiple ports\n");
err = -EINVAL;
goto out;
}
err = mlxsw_env_module_reset(mlxsw_core, slot_index, module);
if (err) {
netdev_err(netdev, "Failed to reset module\n");
goto out;
}
*flags &= ~(ETH_RESET_PHY | (ETH_RESET_PHY << ETH_RESET_SHARED_SHIFT));
out:
mutex_unlock(&mlxsw_env->line_cards_lock);
return err;
}
EXPORT_SYMBOL(mlxsw_env_reset_module);
int
mlxsw_env_get_module_power_mode(struct mlxsw_core *mlxsw_core, u8 slot_index,
u8 module,
struct ethtool_module_power_mode_params *params,
struct netlink_ext_ack *extack)
{
struct mlxsw_env *mlxsw_env = mlxsw_core_env(mlxsw_core);
struct mlxsw_env_module_info *module_info;
char mcion_pl[MLXSW_REG_MCION_LEN];
u32 status_bits;
int err = 0;
mutex_lock(&mlxsw_env->line_cards_lock);
err = __mlxsw_env_validate_module_type(mlxsw_core, slot_index, module);
if (err) {
NL_SET_ERR_MSG_MOD(extack, "Power mode is not supported on port module type");
goto out;
}
module_info = mlxsw_env_module_info_get(mlxsw_core, slot_index, module);
params->policy = module_info->power_mode_policy;
/* Avoid accessing an inactive line card, as it will result in an error. */
if (!__mlxsw_env_linecard_is_active(mlxsw_env, slot_index))
goto out;
mlxsw_reg_mcion_pack(mcion_pl, slot_index, module);
err = mlxsw_reg_query(mlxsw_core, MLXSW_REG(mcion), mcion_pl);
if (err) {
NL_SET_ERR_MSG_MOD(extack, "Failed to retrieve module's power mode");
goto out;
}
status_bits = mlxsw_reg_mcion_module_status_bits_get(mcion_pl);
if (!(status_bits & MLXSW_REG_MCION_MODULE_STATUS_BITS_PRESENT_MASK))
goto out;
if (status_bits & MLXSW_REG_MCION_MODULE_STATUS_BITS_LOW_POWER_MASK)
params->mode = ETHTOOL_MODULE_POWER_MODE_LOW;
else
params->mode = ETHTOOL_MODULE_POWER_MODE_HIGH;
out:
mutex_unlock(&mlxsw_env->line_cards_lock);
return err;
}
EXPORT_SYMBOL(mlxsw_env_get_module_power_mode);
static int mlxsw_env_module_enable_set(struct mlxsw_core *mlxsw_core,
u8 slot_index, u8 module, bool enable)
{
enum mlxsw_reg_pmaos_admin_status admin_status;
char pmaos_pl[MLXSW_REG_PMAOS_LEN];
mlxsw_reg_pmaos_pack(pmaos_pl, slot_index, module);
admin_status = enable ? MLXSW_REG_PMAOS_ADMIN_STATUS_ENABLED :
MLXSW_REG_PMAOS_ADMIN_STATUS_DISABLED;
mlxsw_reg_pmaos_admin_status_set(pmaos_pl, admin_status);
mlxsw_reg_pmaos_ase_set(pmaos_pl, true);
return mlxsw_reg_write(mlxsw_core, MLXSW_REG(pmaos), pmaos_pl);
}
static int mlxsw_env_module_low_power_set(struct mlxsw_core *mlxsw_core,
u8 slot_index, u8 module,
bool low_power)
{
u16 eeprom_override_mask, eeprom_override;
char pmmp_pl[MLXSW_REG_PMMP_LEN];
mlxsw_reg_pmmp_pack(pmmp_pl, slot_index, module);
mlxsw_reg_pmmp_sticky_set(pmmp_pl, true);
/* Mask all the bits except low power mode. */
eeprom_override_mask = ~MLXSW_REG_PMMP_EEPROM_OVERRIDE_LOW_POWER_MASK;
mlxsw_reg_pmmp_eeprom_override_mask_set(pmmp_pl, eeprom_override_mask);
eeprom_override = low_power ? MLXSW_REG_PMMP_EEPROM_OVERRIDE_LOW_POWER_MASK :
0;
mlxsw_reg_pmmp_eeprom_override_set(pmmp_pl, eeprom_override);
return mlxsw_reg_write(mlxsw_core, MLXSW_REG(pmmp), pmmp_pl);
}
static int __mlxsw_env_set_module_power_mode(struct mlxsw_core *mlxsw_core,
u8 slot_index, u8 module,
bool low_power,
struct netlink_ext_ack *extack)
{
struct mlxsw_env *mlxsw_env = mlxsw_core_env(mlxsw_core);
int err;
/* Avoid accessing an inactive line card, as it will result in an error.
* Cached configuration will be applied by mlxsw_env_got_active() when
* line card becomes active.
*/
if (!__mlxsw_env_linecard_is_active(mlxsw_env, slot_index))
return 0;
err = mlxsw_env_module_enable_set(mlxsw_core, slot_index, module, false);
if (err) {
NL_SET_ERR_MSG_MOD(extack, "Failed to disable module");
return err;
}
err = mlxsw_env_module_low_power_set(mlxsw_core, slot_index, module,
low_power);
if (err) {
NL_SET_ERR_MSG_MOD(extack, "Failed to set module's power mode");
goto err_module_low_power_set;
}
err = mlxsw_env_module_enable_set(mlxsw_core, slot_index, module, true);
if (err) {
NL_SET_ERR_MSG_MOD(extack, "Failed to enable module");
goto err_module_enable_set;
}
return 0;
err_module_enable_set:
mlxsw_env_module_low_power_set(mlxsw_core, slot_index, module,
!low_power);
err_module_low_power_set:
mlxsw_env_module_enable_set(mlxsw_core, slot_index, module, true);
return err;
}
static int
mlxsw_env_set_module_power_mode_apply(struct mlxsw_core *mlxsw_core,
u8 slot_index, u8 module,
enum ethtool_module_power_mode_policy policy,
struct netlink_ext_ack *extack)
{
struct mlxsw_env_module_info *module_info;
bool low_power;
int err = 0;
err = __mlxsw_env_validate_module_type(mlxsw_core, slot_index, module);
if (err) {
NL_SET_ERR_MSG_MOD(extack,
"Power mode set is not supported on port module type");
goto out;
}
module_info = mlxsw_env_module_info_get(mlxsw_core, slot_index, module);
if (module_info->power_mode_policy == policy)
goto out;
/* If any ports are up, we are already in high power mode. */
if (module_info->num_ports_up)
goto out_set_policy;
low_power = policy == ETHTOOL_MODULE_POWER_MODE_POLICY_AUTO;
err = __mlxsw_env_set_module_power_mode(mlxsw_core, slot_index, module,
low_power, extack);
if (err)
goto out;
out_set_policy:
module_info->power_mode_policy = policy;
out:
return err;
}
int
mlxsw_env_set_module_power_mode(struct mlxsw_core *mlxsw_core, u8 slot_index,
u8 module,
enum ethtool_module_power_mode_policy policy,
struct netlink_ext_ack *extack)
{
struct mlxsw_env *mlxsw_env = mlxsw_core_env(mlxsw_core);
int err;
if (policy != ETHTOOL_MODULE_POWER_MODE_POLICY_HIGH &&
policy != ETHTOOL_MODULE_POWER_MODE_POLICY_AUTO) {
NL_SET_ERR_MSG_MOD(extack, "Unsupported power mode policy");
return -EOPNOTSUPP;
}
mutex_lock(&mlxsw_env->line_cards_lock);
err = mlxsw_env_set_module_power_mode_apply(mlxsw_core, slot_index,
module, policy, extack);
mutex_unlock(&mlxsw_env->line_cards_lock);
return err;
}
EXPORT_SYMBOL(mlxsw_env_set_module_power_mode);
static int mlxsw_env_module_has_temp_sensor(struct mlxsw_core *mlxsw_core,
u8 slot_index, u8 module,
bool *p_has_temp_sensor)
{
char mtbr_pl[MLXSW_REG_MTBR_LEN];
u16 temp;
int err;
mlxsw_reg_mtbr_pack(mtbr_pl, slot_index,
MLXSW_REG_MTBR_BASE_MODULE_INDEX + module, 1);
err = mlxsw_reg_query(mlxsw_core, MLXSW_REG(mtbr), mtbr_pl);
if (err)
return err;
mlxsw_reg_mtbr_temp_unpack(mtbr_pl, 0, &temp, NULL);
switch (temp) {
case MLXSW_REG_MTBR_BAD_SENS_INFO:
case MLXSW_REG_MTBR_NO_CONN:
case MLXSW_REG_MTBR_NO_TEMP_SENS:
case MLXSW_REG_MTBR_INDEX_NA:
*p_has_temp_sensor = false;
break;
default:
*p_has_temp_sensor = temp ? true : false;
}
return 0;
}
static int
mlxsw_env_temp_event_set(struct mlxsw_core *mlxsw_core, u8 slot_index,
u16 sensor_index, bool enable)
{
char mtmp_pl[MLXSW_REG_MTMP_LEN] = {0};
enum mlxsw_reg_mtmp_tee tee;
int err, threshold_hi;
mlxsw_reg_mtmp_slot_index_set(mtmp_pl, slot_index);
mlxsw_reg_mtmp_sensor_index_set(mtmp_pl, sensor_index);
err = mlxsw_reg_query(mlxsw_core, MLXSW_REG(mtmp), mtmp_pl);
if (err)
return err;
if (enable) {
err = mlxsw_env_module_temp_thresholds_get(mlxsw_core,
slot_index,
sensor_index -
MLXSW_REG_MTMP_MODULE_INDEX_MIN,
SFP_TEMP_HIGH_WARN,
&threshold_hi);
/* In case it is not possible to query the module's threshold,
* use the default value.
*/
if (err)
threshold_hi = MLXSW_REG_MTMP_THRESH_HI;
else
/* mlxsw_env_module_temp_thresholds_get() multiplies
* Celsius degrees by 1000 whereas MTMP expects
* temperature in 0.125 Celsius degrees units.
* Convert threshold_hi to correct units.
*/
threshold_hi = threshold_hi / 1000 * 8;
mlxsw_reg_mtmp_temperature_threshold_hi_set(mtmp_pl, threshold_hi);
mlxsw_reg_mtmp_temperature_threshold_lo_set(mtmp_pl, threshold_hi -
MLXSW_REG_MTMP_HYSTERESIS_TEMP);
}
tee = enable ? MLXSW_REG_MTMP_TEE_GENERATE_EVENT : MLXSW_REG_MTMP_TEE_NO_EVENT;
mlxsw_reg_mtmp_tee_set(mtmp_pl, tee);
return mlxsw_reg_write(mlxsw_core, MLXSW_REG(mtmp), mtmp_pl);
}
static int mlxsw_env_module_temp_event_enable(struct mlxsw_core *mlxsw_core,
u8 slot_index)
{
struct mlxsw_env *mlxsw_env = mlxsw_core_env(mlxsw_core);
int i, err, sensor_index;
bool has_temp_sensor;
for (i = 0; i < mlxsw_env->line_cards[slot_index]->module_count; i++) {
err = mlxsw_env_module_has_temp_sensor(mlxsw_core, slot_index,
i, &has_temp_sensor);
if (err)
return err;
if (!has_temp_sensor)
continue;
sensor_index = i + MLXSW_REG_MTMP_MODULE_INDEX_MIN;
err = mlxsw_env_temp_event_set(mlxsw_core, slot_index,
sensor_index, true);
if (err)
return err;
}
return 0;
}
struct mlxsw_env_module_temp_warn_event {
struct mlxsw_env *mlxsw_env;
char mtwe_pl[MLXSW_REG_MTWE_LEN];
struct work_struct work;
};
static void mlxsw_env_mtwe_event_work(struct work_struct *work)
{
struct mlxsw_env_module_temp_warn_event *event;
struct mlxsw_env_module_info *module_info;
struct mlxsw_env *mlxsw_env;
int i, sensor_warning;
bool is_overheat;
event = container_of(work, struct mlxsw_env_module_temp_warn_event,
work);
mlxsw_env = event->mlxsw_env;
for (i = 0; i < mlxsw_env->max_module_count; i++) {
/* 64-127 of sensor_index are mapped to the port modules
* sequentially (module 0 is mapped to sensor_index 64,
* module 1 to sensor_index 65 and so on)
*/
sensor_warning =
mlxsw_reg_mtwe_sensor_warning_get(event->mtwe_pl,
i + MLXSW_REG_MTMP_MODULE_INDEX_MIN);
mutex_lock(&mlxsw_env->line_cards_lock);
/* MTWE only supports main board. */
module_info = mlxsw_env_module_info_get(mlxsw_env->core, 0, i);
is_overheat = module_info->is_overheat;
if ((is_overheat && sensor_warning) ||
(!is_overheat && !sensor_warning)) {
/* Current state is "warning" and MTWE still reports
* warning OR current state in "no warning" and MTWE
* does not report warning.
*/
mutex_unlock(&mlxsw_env->line_cards_lock);
continue;
} else if (is_overheat && !sensor_warning) {
/* MTWE reports "no warning", turn is_overheat off.
*/
module_info->is_overheat = false;
mutex_unlock(&mlxsw_env->line_cards_lock);
} else {
/* Current state is "no warning" and MTWE reports
* "warning", increase the counter and turn is_overheat
* on.
*/
module_info->is_overheat = true;
module_info->module_overheat_counter++;
mutex_unlock(&mlxsw_env->line_cards_lock);
}
}
kfree(event);
}
static void
mlxsw_env_mtwe_listener_func(const struct mlxsw_reg_info *reg, char *mtwe_pl,
void *priv)
{
struct mlxsw_env_module_temp_warn_event *event;
struct mlxsw_env *mlxsw_env = priv;
event = kmalloc(sizeof(*event), GFP_ATOMIC);
if (!event)
return;
event->mlxsw_env = mlxsw_env;
memcpy(event->mtwe_pl, mtwe_pl, MLXSW_REG_MTWE_LEN);
INIT_WORK(&event->work, mlxsw_env_mtwe_event_work);
mlxsw_core_schedule_work(&event->work);
}
static const struct mlxsw_listener mlxsw_env_temp_warn_listener =
MLXSW_CORE_EVENTL(mlxsw_env_mtwe_listener_func, MTWE);
static int mlxsw_env_temp_warn_event_register(struct mlxsw_core *mlxsw_core)
{
struct mlxsw_env *mlxsw_env = mlxsw_core_env(mlxsw_core);
return mlxsw_core_trap_register(mlxsw_core,
&mlxsw_env_temp_warn_listener,
mlxsw_env);
}
static void mlxsw_env_temp_warn_event_unregister(struct mlxsw_env *mlxsw_env)
{
mlxsw_core_trap_unregister(mlxsw_env->core,
&mlxsw_env_temp_warn_listener, mlxsw_env);
}
struct mlxsw_env_module_plug_unplug_event {
struct mlxsw_env *mlxsw_env;
u8 slot_index;
u8 module;
struct work_struct work;
};
static void mlxsw_env_pmpe_event_work(struct work_struct *work)
{
struct mlxsw_env_module_plug_unplug_event *event;
struct mlxsw_env_module_info *module_info;
struct mlxsw_env *mlxsw_env;
bool has_temp_sensor;
u16 sensor_index;
int err;
event = container_of(work, struct mlxsw_env_module_plug_unplug_event,
work);
mlxsw_env = event->mlxsw_env;
mutex_lock(&mlxsw_env->line_cards_lock);
module_info = mlxsw_env_module_info_get(mlxsw_env->core,
event->slot_index,
event->module);
module_info->is_overheat = false;
mutex_unlock(&mlxsw_env->line_cards_lock);
err = mlxsw_env_module_has_temp_sensor(mlxsw_env->core,
event->slot_index,
event->module,
&has_temp_sensor);
/* Do not disable events on modules without sensors or faulty sensors
* because FW returns errors.
*/
if (err)
goto out;
if (!has_temp_sensor)
goto out;
sensor_index = event->module + MLXSW_REG_MTMP_MODULE_INDEX_MIN;
mlxsw_env_temp_event_set(mlxsw_env->core, event->slot_index,
sensor_index, true);
out:
kfree(event);
}
static void
mlxsw_env_pmpe_listener_func(const struct mlxsw_reg_info *reg, char *pmpe_pl,
void *priv)
{
u8 slot_index = mlxsw_reg_pmpe_slot_index_get(pmpe_pl);
struct mlxsw_env_module_plug_unplug_event *event;
enum mlxsw_reg_pmpe_module_status module_status;
u8 module = mlxsw_reg_pmpe_module_get(pmpe_pl);
struct mlxsw_env *mlxsw_env = priv;
if (WARN_ON_ONCE(module >= mlxsw_env->max_module_count ||
slot_index >= mlxsw_env->num_of_slots))
return;
module_status = mlxsw_reg_pmpe_module_status_get(pmpe_pl);
if (module_status != MLXSW_REG_PMPE_MODULE_STATUS_PLUGGED_ENABLED)
return;
event = kmalloc(sizeof(*event), GFP_ATOMIC);
if (!event)
return;
event->mlxsw_env = mlxsw_env;
event->slot_index = slot_index;
event->module = module;
INIT_WORK(&event->work, mlxsw_env_pmpe_event_work);
mlxsw_core_schedule_work(&event->work);
}
static const struct mlxsw_listener mlxsw_env_module_plug_listener =
MLXSW_CORE_EVENTL(mlxsw_env_pmpe_listener_func, PMPE);
static int
mlxsw_env_module_plug_event_register(struct mlxsw_core *mlxsw_core)
{
struct mlxsw_env *mlxsw_env = mlxsw_core_env(mlxsw_core);
return mlxsw_core_trap_register(mlxsw_core,
&mlxsw_env_module_plug_listener,
mlxsw_env);
}
static void
mlxsw_env_module_plug_event_unregister(struct mlxsw_env *mlxsw_env)
{
mlxsw_core_trap_unregister(mlxsw_env->core,
&mlxsw_env_module_plug_listener,
mlxsw_env);
}
static int
mlxsw_env_module_oper_state_event_enable(struct mlxsw_core *mlxsw_core,
u8 slot_index)
{
struct mlxsw_env *mlxsw_env = mlxsw_core_env(mlxsw_core);
int i, err;
for (i = 0; i < mlxsw_env->line_cards[slot_index]->module_count; i++) {
char pmaos_pl[MLXSW_REG_PMAOS_LEN];
mlxsw_reg_pmaos_pack(pmaos_pl, slot_index, i);
mlxsw_reg_pmaos_e_set(pmaos_pl,
MLXSW_REG_PMAOS_E_GENERATE_EVENT);
mlxsw_reg_pmaos_ee_set(pmaos_pl, true);
err = mlxsw_reg_write(mlxsw_core, MLXSW_REG(pmaos), pmaos_pl);
if (err)
return err;
}
return 0;
}
int
mlxsw_env_module_overheat_counter_get(struct mlxsw_core *mlxsw_core, u8 slot_index,
u8 module, u64 *p_counter)
{
struct mlxsw_env *mlxsw_env = mlxsw_core_env(mlxsw_core);
struct mlxsw_env_module_info *module_info;
mutex_lock(&mlxsw_env->line_cards_lock);
module_info = mlxsw_env_module_info_get(mlxsw_core, slot_index, module);
*p_counter = module_info->module_overheat_counter;
mutex_unlock(&mlxsw_env->line_cards_lock);
return 0;
}
EXPORT_SYMBOL(mlxsw_env_module_overheat_counter_get);
void mlxsw_env_module_port_map(struct mlxsw_core *mlxsw_core, u8 slot_index,
u8 module)
{
struct mlxsw_env *mlxsw_env = mlxsw_core_env(mlxsw_core);
struct mlxsw_env_module_info *module_info;
mutex_lock(&mlxsw_env->line_cards_lock);
module_info = mlxsw_env_module_info_get(mlxsw_core, slot_index, module);
module_info->num_ports_mapped++;
mutex_unlock(&mlxsw_env->line_cards_lock);
}
EXPORT_SYMBOL(mlxsw_env_module_port_map);
void mlxsw_env_module_port_unmap(struct mlxsw_core *mlxsw_core, u8 slot_index,
u8 module)
{
struct mlxsw_env *mlxsw_env = mlxsw_core_env(mlxsw_core);
struct mlxsw_env_module_info *module_info;
mutex_lock(&mlxsw_env->line_cards_lock);
module_info = mlxsw_env_module_info_get(mlxsw_core, slot_index, module);
module_info->num_ports_mapped--;
mutex_unlock(&mlxsw_env->line_cards_lock);
}
EXPORT_SYMBOL(mlxsw_env_module_port_unmap);
int mlxsw_env_module_port_up(struct mlxsw_core *mlxsw_core, u8 slot_index,
u8 module)
{
struct mlxsw_env *mlxsw_env = mlxsw_core_env(mlxsw_core);
struct mlxsw_env_module_info *module_info;
int err = 0;
mutex_lock(&mlxsw_env->line_cards_lock);
module_info = mlxsw_env_module_info_get(mlxsw_core, slot_index, module);
if (module_info->power_mode_policy !=
ETHTOOL_MODULE_POWER_MODE_POLICY_AUTO)
goto out_inc;
if (module_info->num_ports_up != 0)
goto out_inc;
/* Transition to high power mode following first port using the module
* being put administratively up.
*/
err = __mlxsw_env_set_module_power_mode(mlxsw_core, slot_index, module,
false, NULL);
if (err)
goto out_unlock;
out_inc:
module_info->num_ports_up++;
out_unlock:
mutex_unlock(&mlxsw_env->line_cards_lock);
return err;
}
EXPORT_SYMBOL(mlxsw_env_module_port_up);
void mlxsw_env_module_port_down(struct mlxsw_core *mlxsw_core, u8 slot_index,
u8 module)
{
struct mlxsw_env *mlxsw_env = mlxsw_core_env(mlxsw_core);
struct mlxsw_env_module_info *module_info;
mutex_lock(&mlxsw_env->line_cards_lock);
module_info = mlxsw_env_module_info_get(mlxsw_core, slot_index, module);
module_info->num_ports_up--;
if (module_info->power_mode_policy !=
ETHTOOL_MODULE_POWER_MODE_POLICY_AUTO)
goto out_unlock;
if (module_info->num_ports_up != 0)
goto out_unlock;
/* Transition to low power mode following last port using the module
* being put administratively down.
*/
__mlxsw_env_set_module_power_mode(mlxsw_core, slot_index, module, true,
NULL);
out_unlock:
mutex_unlock(&mlxsw_env->line_cards_lock);
}
EXPORT_SYMBOL(mlxsw_env_module_port_down);
static int mlxsw_env_line_cards_alloc(struct mlxsw_env *env)
{
struct mlxsw_env_module_info *module_info;
int i, j;
for (i = 0; i < env->num_of_slots; i++) {
env->line_cards[i] = kzalloc(struct_size(env->line_cards[i],
module_info,
env->max_module_count),
GFP_KERNEL);
if (!env->line_cards[i])
goto kzalloc_err;
/* Firmware defaults to high power mode policy where modules
* are transitioned to high power mode following plug-in.
*/
for (j = 0; j < env->max_module_count; j++) {
module_info = &env->line_cards[i]->module_info[j];
module_info->power_mode_policy =
ETHTOOL_MODULE_POWER_MODE_POLICY_HIGH;
}
}
return 0;
kzalloc_err:
for (i--; i >= 0; i--)
kfree(env->line_cards[i]);
return -ENOMEM;
}
static void mlxsw_env_line_cards_free(struct mlxsw_env *env)
{
int i = env->num_of_slots;
for (i--; i >= 0; i--)
kfree(env->line_cards[i]);
}
static int
mlxsw_env_module_event_enable(struct mlxsw_env *mlxsw_env, u8 slot_index)
{
int err;
err = mlxsw_env_module_oper_state_event_enable(mlxsw_env->core,
slot_index);
if (err)
return err;
err = mlxsw_env_module_temp_event_enable(mlxsw_env->core, slot_index);
if (err)
return err;
return 0;
}
static void
mlxsw_env_module_event_disable(struct mlxsw_env *mlxsw_env, u8 slot_index)
{
}
static int
mlxsw_env_module_type_set(struct mlxsw_core *mlxsw_core, u8 slot_index)
{
struct mlxsw_env *mlxsw_env = mlxsw_core_env(mlxsw_core);
int i;
for (i = 0; i < mlxsw_env->line_cards[slot_index]->module_count; i++) {
struct mlxsw_env_module_info *module_info;
char pmtm_pl[MLXSW_REG_PMTM_LEN];
int err;
mlxsw_reg_pmtm_pack(pmtm_pl, slot_index, i);
err = mlxsw_reg_query(mlxsw_core, MLXSW_REG(pmtm), pmtm_pl);
if (err)
return err;
module_info = mlxsw_env_module_info_get(mlxsw_core, slot_index,
i);
module_info->type = mlxsw_reg_pmtm_module_type_get(pmtm_pl);
}
return 0;
}
static void
mlxsw_env_linecard_modules_power_mode_apply(struct mlxsw_core *mlxsw_core,
struct mlxsw_env *env,
u8 slot_index)
{
int i;
for (i = 0; i < env->line_cards[slot_index]->module_count; i++) {
enum ethtool_module_power_mode_policy policy;
struct mlxsw_env_module_info *module_info;
struct netlink_ext_ack extack;
int err;
module_info = &env->line_cards[slot_index]->module_info[i];
policy = module_info->power_mode_policy;
err = mlxsw_env_set_module_power_mode_apply(mlxsw_core,
slot_index, i,
policy, &extack);
if (err)
dev_err(env->bus_info->dev, "%s\n", extack._msg);
}
}
static void
mlxsw_env_got_active(struct mlxsw_core *mlxsw_core, u8 slot_index, void *priv)
{
struct mlxsw_env *mlxsw_env = priv;
char mgpir_pl[MLXSW_REG_MGPIR_LEN];
int err;
mutex_lock(&mlxsw_env->line_cards_lock);
if (__mlxsw_env_linecard_is_active(mlxsw_env, slot_index))
goto out_unlock;
mlxsw_reg_mgpir_pack(mgpir_pl, slot_index);
err = mlxsw_reg_query(mlxsw_env->core, MLXSW_REG(mgpir), mgpir_pl);
if (err)
goto out_unlock;
mlxsw_reg_mgpir_unpack(mgpir_pl, NULL, NULL, NULL,
&mlxsw_env->line_cards[slot_index]->module_count,
NULL);
err = mlxsw_env_module_event_enable(mlxsw_env, slot_index);
if (err) {
dev_err(mlxsw_env->bus_info->dev, "Failed to enable port module events for line card in slot %d\n",
slot_index);
goto err_mlxsw_env_module_event_enable;
}
err = mlxsw_env_module_type_set(mlxsw_env->core, slot_index);
if (err) {
dev_err(mlxsw_env->bus_info->dev, "Failed to set modules' type for line card in slot %d\n",
slot_index);
goto err_type_set;
}
mlxsw_env->line_cards[slot_index]->active = true;
/* Apply power mode policy. */
mlxsw_env_linecard_modules_power_mode_apply(mlxsw_core, mlxsw_env,
slot_index);
mutex_unlock(&mlxsw_env->line_cards_lock);
return;
err_type_set:
mlxsw_env_module_event_disable(mlxsw_env, slot_index);
err_mlxsw_env_module_event_enable:
out_unlock:
mutex_unlock(&mlxsw_env->line_cards_lock);
}
static void
mlxsw_env_got_inactive(struct mlxsw_core *mlxsw_core, u8 slot_index,
void *priv)
{
struct mlxsw_env *mlxsw_env = priv;
mutex_lock(&mlxsw_env->line_cards_lock);
if (!__mlxsw_env_linecard_is_active(mlxsw_env, slot_index))
goto out_unlock;
mlxsw_env->line_cards[slot_index]->active = false;
mlxsw_env_module_event_disable(mlxsw_env, slot_index);
mlxsw_env->line_cards[slot_index]->module_count = 0;
out_unlock:
mutex_unlock(&mlxsw_env->line_cards_lock);
}
static struct mlxsw_linecards_event_ops mlxsw_env_event_ops = {
.got_active = mlxsw_env_got_active,
.got_inactive = mlxsw_env_got_inactive,
};
static void mlxsw_env_max_module_eeprom_len_query(struct mlxsw_env *mlxsw_env)
{
char mcam_pl[MLXSW_REG_MCAM_LEN];
bool mcia_128b_supported = false;
int err;
mlxsw_reg_mcam_pack(mcam_pl,
MLXSW_REG_MCAM_FEATURE_GROUP_ENHANCED_FEATURES);
err = mlxsw_reg_query(mlxsw_env->core, MLXSW_REG(mcam), mcam_pl);
if (!err)
mlxsw_reg_mcam_unpack(mcam_pl, MLXSW_REG_MCAM_MCIA_128B,
&mcia_128b_supported);
mlxsw_env->max_eeprom_len = mcia_128b_supported ? 128 : 48;
}
int mlxsw_env_init(struct mlxsw_core *mlxsw_core,
const struct mlxsw_bus_info *bus_info,
struct mlxsw_env **p_env)
{
u8 module_count, num_of_slots, max_module_count;
char mgpir_pl[MLXSW_REG_MGPIR_LEN];
struct mlxsw_env *env;
int err;
mlxsw_reg_mgpir_pack(mgpir_pl, 0);
err = mlxsw_reg_query(mlxsw_core, MLXSW_REG(mgpir), mgpir_pl);
if (err)
return err;
mlxsw_reg_mgpir_unpack(mgpir_pl, NULL, NULL, NULL, &module_count,
&num_of_slots);
/* If the system is modular, get the maximum number of modules per-slot.
* Otherwise, get the maximum number of modules on the main board.
*/
max_module_count = num_of_slots ?
mlxsw_reg_mgpir_max_modules_per_slot_get(mgpir_pl) :
module_count;
env = kzalloc(struct_size(env, line_cards, num_of_slots + 1),
GFP_KERNEL);
if (!env)
return -ENOMEM;
env->core = mlxsw_core;
env->bus_info = bus_info;
env->num_of_slots = num_of_slots + 1;
env->max_module_count = max_module_count;
err = mlxsw_env_line_cards_alloc(env);
if (err)
goto err_mlxsw_env_line_cards_alloc;
mutex_init(&env->line_cards_lock);
*p_env = env;
err = mlxsw_linecards_event_ops_register(env->core,
&mlxsw_env_event_ops, env);
if (err)
goto err_linecards_event_ops_register;
err = mlxsw_env_temp_warn_event_register(mlxsw_core);
if (err)
goto err_temp_warn_event_register;
err = mlxsw_env_module_plug_event_register(mlxsw_core);
if (err)
goto err_module_plug_event_register;
/* Set 'module_count' only for main board. Actual count for line card
* is to be set after line card is activated.
*/
env->line_cards[0]->module_count = num_of_slots ? 0 : module_count;
/* Enable events only for main board. Line card events are to be
* configured only after line card is activated. Before that, access to
* modules on line cards is not allowed.
*/
err = mlxsw_env_module_event_enable(env, 0);
if (err)
goto err_mlxsw_env_module_event_enable;
err = mlxsw_env_module_type_set(mlxsw_core, 0);
if (err)
goto err_type_set;
mlxsw_env_max_module_eeprom_len_query(env);
env->line_cards[0]->active = true;
return 0;
err_type_set:
mlxsw_env_module_event_disable(env, 0);
err_mlxsw_env_module_event_enable:
mlxsw_env_module_plug_event_unregister(env);
err_module_plug_event_register:
mlxsw_env_temp_warn_event_unregister(env);
err_temp_warn_event_register:
mlxsw_linecards_event_ops_unregister(env->core,
&mlxsw_env_event_ops, env);
err_linecards_event_ops_register:
mutex_destroy(&env->line_cards_lock);
mlxsw_env_line_cards_free(env);
err_mlxsw_env_line_cards_alloc:
kfree(env);
return err;
}
void mlxsw_env_fini(struct mlxsw_env *env)
{
env->line_cards[0]->active = false;
mlxsw_env_module_event_disable(env, 0);
mlxsw_env_module_plug_event_unregister(env);
/* Make sure there is no more event work scheduled. */
mlxsw_core_flush_owq();
mlxsw_env_temp_warn_event_unregister(env);
mlxsw_linecards_event_ops_unregister(env->core,
&mlxsw_env_event_ops, env);
mutex_destroy(&env->line_cards_lock);
mlxsw_env_line_cards_free(env);
kfree(env);
}
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