// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
-/* Copyright (c) 2016-2018 Mellanox Technologies. All rights reserved */
+/* 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/types.h>
#include "core.h"
+#include "core_env.h"
#include "i2c.h"
static const char mlxsw_m_driver_name[] = "mlxsw_minimal";
+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_port_dummy_open_stop(struct net_device *dev)
+{
+ return 0;
+}
+
+static int
+mlxsw_m_port_get_phys_port_name(struct net_device *dev, char *name, size_t len)
+{
+ struct mlxsw_m_port *mlxsw_m_port = netdev_priv(dev);
+ struct mlxsw_core *core = mlxsw_m_port->mlxsw_m->core;
+ u8 local_port = mlxsw_m_port->local_port;
+
+ return mlxsw_core_port_get_phys_port_name(core, local_port, name, len);
+}
+
+static int mlxsw_m_port_get_port_parent_id(struct net_device *dev,
+ struct netdev_phys_item_id *ppid)
+{
+ struct mlxsw_m_port *mlxsw_m_port = netdev_priv(dev);
+ struct mlxsw_m *mlxsw_m = mlxsw_m_port->mlxsw_m;
+
+ ppid->id_len = sizeof(mlxsw_m->base_mac);
+ memcpy(&ppid->id, &mlxsw_m->base_mac, ppid->id_len);
+
+ return 0;
+}
+
+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_phys_port_name = mlxsw_m_port_get_phys_port_name,
+ .ndo_get_port_parent_id = mlxsw_m_port_get_port_parent_id,
+};
+
+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_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);
+ 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);
+ 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, module + 1, false, 0);
+
+ 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_init(struct mlxsw_core *mlxsw_core,
+ const struct mlxsw_bus_info *mlxsw_bus_info)
+{
+ 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_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 = 1,
+ .priv_size = sizeof(struct mlxsw_m),
+ .init = mlxsw_m_init,
+ .fini = mlxsw_m_fini,
.profile = &mlxsw_m_config_profile,
};
projects / users / hch / configfs.git / commitdiff