blob: 2b543911ae001dac34815dd0d466038a1c8dd97f [file] [log] [blame]
// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
/* Copyright (c) 2016-2019 Mellanox Technologies. All rights reserved */
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/ethtool.h>
#include <linux/i2c.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/mod_devicetable.h>
#include <linux/types.h>
#include "core.h"
#include "core_env.h"
#include "i2c.h"
static const char mlxsw_m_driver_name[] = "mlxsw_minimal";
#define MLXSW_M_FWREV_MINOR 2000
#define MLXSW_M_FWREV_SUBMINOR 1886
static const struct mlxsw_fw_rev mlxsw_m_fw_rev = {
.minor = MLXSW_M_FWREV_MINOR,
.subminor = MLXSW_M_FWREV_SUBMINOR,
};
struct mlxsw_m_port;
struct mlxsw_m {
struct mlxsw_m_port **ports;
int *module_to_port;
struct mlxsw_core *core;
const struct mlxsw_bus_info *bus_info;
u8 base_mac[ETH_ALEN];
u8 max_ports;
};
struct mlxsw_m_port {
struct net_device *dev;
struct mlxsw_m *mlxsw_m;
u8 local_port;
u8 module;
};
static int mlxsw_m_base_mac_get(struct mlxsw_m *mlxsw_m)
{
char spad_pl[MLXSW_REG_SPAD_LEN] = {0};
int err;
err = mlxsw_reg_query(mlxsw_m->core, MLXSW_REG(spad), spad_pl);
if (err)
return err;
mlxsw_reg_spad_base_mac_memcpy_from(spad_pl, mlxsw_m->base_mac);
return 0;
}
static int mlxsw_m_port_dummy_open_stop(struct net_device *dev)
{
return 0;
}
static struct devlink_port *
mlxsw_m_port_get_devlink_port(struct net_device *dev)
{
struct mlxsw_m_port *mlxsw_m_port = netdev_priv(dev);
struct mlxsw_m *mlxsw_m = mlxsw_m_port->mlxsw_m;
return mlxsw_core_port_devlink_port_get(mlxsw_m->core,
mlxsw_m_port->local_port);
}
static const struct net_device_ops mlxsw_m_port_netdev_ops = {
.ndo_open = mlxsw_m_port_dummy_open_stop,
.ndo_stop = mlxsw_m_port_dummy_open_stop,
.ndo_get_devlink_port = mlxsw_m_port_get_devlink_port,
};
static void mlxsw_m_module_get_drvinfo(struct net_device *dev,
struct ethtool_drvinfo *drvinfo)
{
struct mlxsw_m_port *mlxsw_m_port = netdev_priv(dev);
struct mlxsw_m *mlxsw_m = mlxsw_m_port->mlxsw_m;
strlcpy(drvinfo->driver, mlxsw_m->bus_info->device_kind,
sizeof(drvinfo->driver));
snprintf(drvinfo->fw_version, sizeof(drvinfo->fw_version),
"%d.%d.%d",
mlxsw_m->bus_info->fw_rev.major,
mlxsw_m->bus_info->fw_rev.minor,
mlxsw_m->bus_info->fw_rev.subminor);
strlcpy(drvinfo->bus_info, mlxsw_m->bus_info->device_name,
sizeof(drvinfo->bus_info));
}
static int mlxsw_m_get_module_info(struct net_device *netdev,
struct ethtool_modinfo *modinfo)
{
struct mlxsw_m_port *mlxsw_m_port = netdev_priv(netdev);
struct mlxsw_core *core = mlxsw_m_port->mlxsw_m->core;
return mlxsw_env_get_module_info(core, mlxsw_m_port->module, modinfo);
}
static int
mlxsw_m_get_module_eeprom(struct net_device *netdev, struct ethtool_eeprom *ee,
u8 *data)
{
struct mlxsw_m_port *mlxsw_m_port = netdev_priv(netdev);
struct mlxsw_core *core = mlxsw_m_port->mlxsw_m->core;
return mlxsw_env_get_module_eeprom(netdev, core, mlxsw_m_port->module,
ee, data);
}
static const struct ethtool_ops mlxsw_m_port_ethtool_ops = {
.get_drvinfo = mlxsw_m_module_get_drvinfo,
.get_module_info = mlxsw_m_get_module_info,
.get_module_eeprom = mlxsw_m_get_module_eeprom,
};
static int
mlxsw_m_port_module_info_get(struct mlxsw_m *mlxsw_m, u8 local_port,
u8 *p_module, u8 *p_width)
{
char pmlp_pl[MLXSW_REG_PMLP_LEN];
int err;
mlxsw_reg_pmlp_pack(pmlp_pl, local_port);
err = mlxsw_reg_query(mlxsw_m->core, MLXSW_REG(pmlp), pmlp_pl);
if (err)
return err;
*p_module = mlxsw_reg_pmlp_module_get(pmlp_pl, 0);
*p_width = mlxsw_reg_pmlp_width_get(pmlp_pl);
return 0;
}
static int
mlxsw_m_port_dev_addr_get(struct mlxsw_m_port *mlxsw_m_port)
{
struct mlxsw_m *mlxsw_m = mlxsw_m_port->mlxsw_m;
struct net_device *dev = mlxsw_m_port->dev;
char ppad_pl[MLXSW_REG_PPAD_LEN];
int err;
mlxsw_reg_ppad_pack(ppad_pl, false, 0);
err = mlxsw_reg_query(mlxsw_m->core, MLXSW_REG(ppad), ppad_pl);
if (err)
return err;
mlxsw_reg_ppad_mac_memcpy_from(ppad_pl, dev->dev_addr);
/* The last byte value in base mac address is guaranteed
* to be such it does not overflow when adding local_port
* value.
*/
dev->dev_addr[ETH_ALEN - 1] += mlxsw_m_port->module + 1;
return 0;
}
static int
mlxsw_m_port_create(struct mlxsw_m *mlxsw_m, u8 local_port, u8 module)
{
struct mlxsw_m_port *mlxsw_m_port;
struct net_device *dev;
int err;
err = mlxsw_core_port_init(mlxsw_m->core, local_port,
module + 1, false, 0,
mlxsw_m->base_mac,
sizeof(mlxsw_m->base_mac));
if (err) {
dev_err(mlxsw_m->bus_info->dev, "Port %d: Failed to init core port\n",
local_port);
return err;
}
dev = alloc_etherdev(sizeof(struct mlxsw_m_port));
if (!dev) {
err = -ENOMEM;
goto err_alloc_etherdev;
}
SET_NETDEV_DEV(dev, mlxsw_m->bus_info->dev);
dev_net_set(dev, mlxsw_core_net(mlxsw_m->core));
mlxsw_m_port = netdev_priv(dev);
mlxsw_m_port->dev = dev;
mlxsw_m_port->mlxsw_m = mlxsw_m;
mlxsw_m_port->local_port = local_port;
mlxsw_m_port->module = module;
dev->netdev_ops = &mlxsw_m_port_netdev_ops;
dev->ethtool_ops = &mlxsw_m_port_ethtool_ops;
err = mlxsw_m_port_dev_addr_get(mlxsw_m_port);
if (err) {
dev_err(mlxsw_m->bus_info->dev, "Port %d: Unable to get port mac address\n",
mlxsw_m_port->local_port);
goto err_dev_addr_get;
}
netif_carrier_off(dev);
mlxsw_m->ports[local_port] = mlxsw_m_port;
err = register_netdev(dev);
if (err) {
dev_err(mlxsw_m->bus_info->dev, "Port %d: Failed to register netdev\n",
mlxsw_m_port->local_port);
goto err_register_netdev;
}
mlxsw_core_port_eth_set(mlxsw_m->core, mlxsw_m_port->local_port,
mlxsw_m_port, dev);
return 0;
err_register_netdev:
mlxsw_m->ports[local_port] = NULL;
free_netdev(dev);
err_dev_addr_get:
err_alloc_etherdev:
mlxsw_core_port_fini(mlxsw_m->core, local_port);
return err;
}
static void mlxsw_m_port_remove(struct mlxsw_m *mlxsw_m, u8 local_port)
{
struct mlxsw_m_port *mlxsw_m_port = mlxsw_m->ports[local_port];
mlxsw_core_port_clear(mlxsw_m->core, local_port, mlxsw_m);
unregister_netdev(mlxsw_m_port->dev); /* This calls ndo_stop */
mlxsw_m->ports[local_port] = NULL;
free_netdev(mlxsw_m_port->dev);
mlxsw_core_port_fini(mlxsw_m->core, local_port);
}
static int mlxsw_m_port_module_map(struct mlxsw_m *mlxsw_m, u8 local_port,
u8 *last_module)
{
u8 module, width;
int err;
/* Fill out to local port mapping array */
err = mlxsw_m_port_module_info_get(mlxsw_m, local_port, &module,
&width);
if (err)
return err;
if (!width)
return 0;
/* Skip, if port belongs to the cluster */
if (module == *last_module)
return 0;
*last_module = module;
mlxsw_m->module_to_port[module] = ++mlxsw_m->max_ports;
return 0;
}
static void mlxsw_m_port_module_unmap(struct mlxsw_m *mlxsw_m, u8 module)
{
mlxsw_m->module_to_port[module] = -1;
}
static int mlxsw_m_ports_create(struct mlxsw_m *mlxsw_m)
{
unsigned int max_ports = mlxsw_core_max_ports(mlxsw_m->core);
u8 last_module = max_ports;
int i;
int err;
mlxsw_m->ports = kcalloc(max_ports, sizeof(*mlxsw_m->ports),
GFP_KERNEL);
if (!mlxsw_m->ports)
return -ENOMEM;
mlxsw_m->module_to_port = kmalloc_array(max_ports, sizeof(int),
GFP_KERNEL);
if (!mlxsw_m->module_to_port) {
err = -ENOMEM;
goto err_module_to_port_alloc;
}
/* Invalidate the entries of module to local port mapping array */
for (i = 0; i < max_ports; i++)
mlxsw_m->module_to_port[i] = -1;
/* Fill out module to local port mapping array */
for (i = 1; i < max_ports; i++) {
err = mlxsw_m_port_module_map(mlxsw_m, i, &last_module);
if (err)
goto err_module_to_port_map;
}
/* Create port objects for each valid entry */
for (i = 0; i < mlxsw_m->max_ports; i++) {
if (mlxsw_m->module_to_port[i] > 0) {
err = mlxsw_m_port_create(mlxsw_m,
mlxsw_m->module_to_port[i],
i);
if (err)
goto err_module_to_port_create;
}
}
return 0;
err_module_to_port_create:
for (i--; i >= 0; i--) {
if (mlxsw_m->module_to_port[i] > 0)
mlxsw_m_port_remove(mlxsw_m,
mlxsw_m->module_to_port[i]);
}
i = max_ports;
err_module_to_port_map:
for (i--; i > 0; i--)
mlxsw_m_port_module_unmap(mlxsw_m, i);
kfree(mlxsw_m->module_to_port);
err_module_to_port_alloc:
kfree(mlxsw_m->ports);
return err;
}
static void mlxsw_m_ports_remove(struct mlxsw_m *mlxsw_m)
{
int i;
for (i = 0; i < mlxsw_m->max_ports; i++) {
if (mlxsw_m->module_to_port[i] > 0) {
mlxsw_m_port_remove(mlxsw_m,
mlxsw_m->module_to_port[i]);
mlxsw_m_port_module_unmap(mlxsw_m, i);
}
}
kfree(mlxsw_m->module_to_port);
kfree(mlxsw_m->ports);
}
static int mlxsw_m_fw_rev_validate(struct mlxsw_m *mlxsw_m)
{
const struct mlxsw_fw_rev *rev = &mlxsw_m->bus_info->fw_rev;
/* Validate driver and FW are compatible.
* Do not check major version, since it defines chip type, while
* driver is supposed to support any type.
*/
if (mlxsw_core_fw_rev_minor_subminor_validate(rev, &mlxsw_m_fw_rev))
return 0;
dev_err(mlxsw_m->bus_info->dev, "The firmware version %d.%d.%d is incompatible with the driver (required >= %d.%d.%d)\n",
rev->major, rev->minor, rev->subminor, rev->major,
mlxsw_m_fw_rev.minor, mlxsw_m_fw_rev.subminor);
return -EINVAL;
}
static int mlxsw_m_init(struct mlxsw_core *mlxsw_core,
const struct mlxsw_bus_info *mlxsw_bus_info,
struct netlink_ext_ack *extack)
{
struct mlxsw_m *mlxsw_m = mlxsw_core_driver_priv(mlxsw_core);
int err;
mlxsw_m->core = mlxsw_core;
mlxsw_m->bus_info = mlxsw_bus_info;
err = mlxsw_m_fw_rev_validate(mlxsw_m);
if (err)
return err;
err = mlxsw_m_base_mac_get(mlxsw_m);
if (err) {
dev_err(mlxsw_m->bus_info->dev, "Failed to get base mac\n");
return err;
}
err = mlxsw_m_ports_create(mlxsw_m);
if (err) {
dev_err(mlxsw_m->bus_info->dev, "Failed to create ports\n");
return err;
}
return 0;
}
static void mlxsw_m_fini(struct mlxsw_core *mlxsw_core)
{
struct mlxsw_m *mlxsw_m = mlxsw_core_driver_priv(mlxsw_core);
mlxsw_m_ports_remove(mlxsw_m);
}
static const struct mlxsw_config_profile mlxsw_m_config_profile;
static struct mlxsw_driver mlxsw_m_driver = {
.kind = mlxsw_m_driver_name,
.priv_size = sizeof(struct mlxsw_m),
.init = mlxsw_m_init,
.fini = mlxsw_m_fini,
.profile = &mlxsw_m_config_profile,
.res_query_enabled = true,
};
static const struct i2c_device_id mlxsw_m_i2c_id[] = {
{ "mlxsw_minimal", 0},
{ },
};
static struct i2c_driver mlxsw_m_i2c_driver = {
.driver.name = "mlxsw_minimal",
.class = I2C_CLASS_HWMON,
.id_table = mlxsw_m_i2c_id,
};
static int __init mlxsw_m_module_init(void)
{
int err;
err = mlxsw_core_driver_register(&mlxsw_m_driver);
if (err)
return err;
err = mlxsw_i2c_driver_register(&mlxsw_m_i2c_driver);
if (err)
goto err_i2c_driver_register;
return 0;
err_i2c_driver_register:
mlxsw_core_driver_unregister(&mlxsw_m_driver);
return err;
}
static void __exit mlxsw_m_module_exit(void)
{
mlxsw_i2c_driver_unregister(&mlxsw_m_i2c_driver);
mlxsw_core_driver_unregister(&mlxsw_m_driver);
}
module_init(mlxsw_m_module_init);
module_exit(mlxsw_m_module_exit);
MODULE_LICENSE("Dual BSD/GPL");
MODULE_AUTHOR("Vadim Pasternak <vadimp@mellanox.com>");
MODULE_DESCRIPTION("Mellanox minimal driver");
MODULE_DEVICE_TABLE(i2c, mlxsw_m_i2c_id);