1 // SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0 2 /* Copyright (c) 2016-2019 Mellanox Technologies. All rights reserved */ 3 4 #include <linux/netdevice.h> 5 #include <linux/etherdevice.h> 6 #include <linux/ethtool.h> 7 #include <linux/i2c.h> 8 #include <linux/kernel.h> 9 #include <linux/module.h> 10 #include <linux/mod_devicetable.h> 11 #include <linux/types.h> 12 13 #include "core.h" 14 #include "core_env.h" 15 #include "i2c.h" 16 17 static const char mlxsw_m_driver_name[] = "mlxsw_minimal"; 18 19 #define MLXSW_M_FWREV_MINOR 2000 20 #define MLXSW_M_FWREV_SUBMINOR 1886 21 22 static const struct mlxsw_fw_rev mlxsw_m_fw_rev = { 23 .minor = MLXSW_M_FWREV_MINOR, 24 .subminor = MLXSW_M_FWREV_SUBMINOR, 25 }; 26 27 struct mlxsw_m_port; 28 29 struct mlxsw_m { 30 struct mlxsw_m_port **ports; 31 int *module_to_port; 32 struct mlxsw_core *core; 33 const struct mlxsw_bus_info *bus_info; 34 u8 base_mac[ETH_ALEN]; 35 u8 max_ports; 36 }; 37 38 struct mlxsw_m_port { 39 struct net_device *dev; 40 struct mlxsw_m *mlxsw_m; 41 u8 local_port; 42 u8 module; 43 }; 44 45 static int mlxsw_m_base_mac_get(struct mlxsw_m *mlxsw_m) 46 { 47 char spad_pl[MLXSW_REG_SPAD_LEN] = {0}; 48 int err; 49 50 err = mlxsw_reg_query(mlxsw_m->core, MLXSW_REG(spad), spad_pl); 51 if (err) 52 return err; 53 mlxsw_reg_spad_base_mac_memcpy_from(spad_pl, mlxsw_m->base_mac); 54 return 0; 55 } 56 57 static int mlxsw_m_port_open(struct net_device *dev) 58 { 59 struct mlxsw_m_port *mlxsw_m_port = netdev_priv(dev); 60 struct mlxsw_m *mlxsw_m = mlxsw_m_port->mlxsw_m; 61 62 return mlxsw_env_module_port_up(mlxsw_m->core, mlxsw_m_port->module); 63 } 64 65 static int mlxsw_m_port_stop(struct net_device *dev) 66 { 67 struct mlxsw_m_port *mlxsw_m_port = netdev_priv(dev); 68 struct mlxsw_m *mlxsw_m = mlxsw_m_port->mlxsw_m; 69 70 mlxsw_env_module_port_down(mlxsw_m->core, mlxsw_m_port->module); 71 return 0; 72 } 73 74 static struct devlink_port * 75 mlxsw_m_port_get_devlink_port(struct net_device *dev) 76 { 77 struct mlxsw_m_port *mlxsw_m_port = netdev_priv(dev); 78 struct mlxsw_m *mlxsw_m = mlxsw_m_port->mlxsw_m; 79 80 return mlxsw_core_port_devlink_port_get(mlxsw_m->core, 81 mlxsw_m_port->local_port); 82 } 83 84 static const struct net_device_ops mlxsw_m_port_netdev_ops = { 85 .ndo_open = mlxsw_m_port_open, 86 .ndo_stop = mlxsw_m_port_stop, 87 .ndo_get_devlink_port = mlxsw_m_port_get_devlink_port, 88 }; 89 90 static void mlxsw_m_module_get_drvinfo(struct net_device *dev, 91 struct ethtool_drvinfo *drvinfo) 92 { 93 struct mlxsw_m_port *mlxsw_m_port = netdev_priv(dev); 94 struct mlxsw_m *mlxsw_m = mlxsw_m_port->mlxsw_m; 95 96 strlcpy(drvinfo->driver, mlxsw_m->bus_info->device_kind, 97 sizeof(drvinfo->driver)); 98 snprintf(drvinfo->fw_version, sizeof(drvinfo->fw_version), 99 "%d.%d.%d", 100 mlxsw_m->bus_info->fw_rev.major, 101 mlxsw_m->bus_info->fw_rev.minor, 102 mlxsw_m->bus_info->fw_rev.subminor); 103 strlcpy(drvinfo->bus_info, mlxsw_m->bus_info->device_name, 104 sizeof(drvinfo->bus_info)); 105 } 106 107 static int mlxsw_m_get_module_info(struct net_device *netdev, 108 struct ethtool_modinfo *modinfo) 109 { 110 struct mlxsw_m_port *mlxsw_m_port = netdev_priv(netdev); 111 struct mlxsw_core *core = mlxsw_m_port->mlxsw_m->core; 112 113 return mlxsw_env_get_module_info(core, mlxsw_m_port->module, modinfo); 114 } 115 116 static int 117 mlxsw_m_get_module_eeprom(struct net_device *netdev, struct ethtool_eeprom *ee, 118 u8 *data) 119 { 120 struct mlxsw_m_port *mlxsw_m_port = netdev_priv(netdev); 121 struct mlxsw_core *core = mlxsw_m_port->mlxsw_m->core; 122 123 return mlxsw_env_get_module_eeprom(netdev, core, mlxsw_m_port->module, 124 ee, data); 125 } 126 127 static int 128 mlxsw_m_get_module_eeprom_by_page(struct net_device *netdev, 129 const struct ethtool_module_eeprom *page, 130 struct netlink_ext_ack *extack) 131 { 132 struct mlxsw_m_port *mlxsw_m_port = netdev_priv(netdev); 133 struct mlxsw_core *core = mlxsw_m_port->mlxsw_m->core; 134 135 return mlxsw_env_get_module_eeprom_by_page(core, mlxsw_m_port->module, 136 page, extack); 137 } 138 139 static int mlxsw_m_reset(struct net_device *netdev, u32 *flags) 140 { 141 struct mlxsw_m_port *mlxsw_m_port = netdev_priv(netdev); 142 struct mlxsw_core *core = mlxsw_m_port->mlxsw_m->core; 143 144 return mlxsw_env_reset_module(netdev, core, mlxsw_m_port->module, 145 flags); 146 } 147 148 static int 149 mlxsw_m_get_module_power_mode(struct net_device *netdev, 150 struct ethtool_module_power_mode_params *params, 151 struct netlink_ext_ack *extack) 152 { 153 struct mlxsw_m_port *mlxsw_m_port = netdev_priv(netdev); 154 struct mlxsw_core *core = mlxsw_m_port->mlxsw_m->core; 155 156 return mlxsw_env_get_module_power_mode(core, mlxsw_m_port->module, 157 params, extack); 158 } 159 160 static int 161 mlxsw_m_set_module_power_mode(struct net_device *netdev, 162 const struct ethtool_module_power_mode_params *params, 163 struct netlink_ext_ack *extack) 164 { 165 struct mlxsw_m_port *mlxsw_m_port = netdev_priv(netdev); 166 struct mlxsw_core *core = mlxsw_m_port->mlxsw_m->core; 167 168 return mlxsw_env_set_module_power_mode(core, mlxsw_m_port->module, 169 params->policy, extack); 170 } 171 172 static const struct ethtool_ops mlxsw_m_port_ethtool_ops = { 173 .get_drvinfo = mlxsw_m_module_get_drvinfo, 174 .get_module_info = mlxsw_m_get_module_info, 175 .get_module_eeprom = mlxsw_m_get_module_eeprom, 176 .get_module_eeprom_by_page = mlxsw_m_get_module_eeprom_by_page, 177 .reset = mlxsw_m_reset, 178 .get_module_power_mode = mlxsw_m_get_module_power_mode, 179 .set_module_power_mode = mlxsw_m_set_module_power_mode, 180 }; 181 182 static int 183 mlxsw_m_port_module_info_get(struct mlxsw_m *mlxsw_m, u8 local_port, 184 u8 *p_module, u8 *p_width) 185 { 186 char pmlp_pl[MLXSW_REG_PMLP_LEN]; 187 int err; 188 189 mlxsw_reg_pmlp_pack(pmlp_pl, local_port); 190 err = mlxsw_reg_query(mlxsw_m->core, MLXSW_REG(pmlp), pmlp_pl); 191 if (err) 192 return err; 193 *p_module = mlxsw_reg_pmlp_module_get(pmlp_pl, 0); 194 *p_width = mlxsw_reg_pmlp_width_get(pmlp_pl); 195 196 return 0; 197 } 198 199 static int 200 mlxsw_m_port_dev_addr_get(struct mlxsw_m_port *mlxsw_m_port) 201 { 202 struct mlxsw_m *mlxsw_m = mlxsw_m_port->mlxsw_m; 203 char ppad_pl[MLXSW_REG_PPAD_LEN]; 204 u8 addr[ETH_ALEN]; 205 int err; 206 207 mlxsw_reg_ppad_pack(ppad_pl, false, 0); 208 err = mlxsw_reg_query(mlxsw_m->core, MLXSW_REG(ppad), ppad_pl); 209 if (err) 210 return err; 211 mlxsw_reg_ppad_mac_memcpy_from(ppad_pl, addr); 212 eth_hw_addr_gen(mlxsw_m_port->dev, addr, mlxsw_m_port->module + 1); 213 return 0; 214 } 215 216 static int 217 mlxsw_m_port_create(struct mlxsw_m *mlxsw_m, u8 local_port, u8 module) 218 { 219 struct mlxsw_m_port *mlxsw_m_port; 220 struct net_device *dev; 221 int err; 222 223 err = mlxsw_core_port_init(mlxsw_m->core, local_port, 224 module + 1, false, 0, false, 225 0, mlxsw_m->base_mac, 226 sizeof(mlxsw_m->base_mac)); 227 if (err) { 228 dev_err(mlxsw_m->bus_info->dev, "Port %d: Failed to init core port\n", 229 local_port); 230 return err; 231 } 232 233 dev = alloc_etherdev(sizeof(struct mlxsw_m_port)); 234 if (!dev) { 235 err = -ENOMEM; 236 goto err_alloc_etherdev; 237 } 238 239 SET_NETDEV_DEV(dev, mlxsw_m->bus_info->dev); 240 dev_net_set(dev, mlxsw_core_net(mlxsw_m->core)); 241 mlxsw_m_port = netdev_priv(dev); 242 mlxsw_m_port->dev = dev; 243 mlxsw_m_port->mlxsw_m = mlxsw_m; 244 mlxsw_m_port->local_port = local_port; 245 mlxsw_m_port->module = module; 246 247 dev->netdev_ops = &mlxsw_m_port_netdev_ops; 248 dev->ethtool_ops = &mlxsw_m_port_ethtool_ops; 249 250 err = mlxsw_m_port_dev_addr_get(mlxsw_m_port); 251 if (err) { 252 dev_err(mlxsw_m->bus_info->dev, "Port %d: Unable to get port mac address\n", 253 mlxsw_m_port->local_port); 254 goto err_dev_addr_get; 255 } 256 257 netif_carrier_off(dev); 258 mlxsw_m->ports[local_port] = mlxsw_m_port; 259 err = register_netdev(dev); 260 if (err) { 261 dev_err(mlxsw_m->bus_info->dev, "Port %d: Failed to register netdev\n", 262 mlxsw_m_port->local_port); 263 goto err_register_netdev; 264 } 265 266 mlxsw_core_port_eth_set(mlxsw_m->core, mlxsw_m_port->local_port, 267 mlxsw_m_port, dev); 268 269 return 0; 270 271 err_register_netdev: 272 mlxsw_m->ports[local_port] = NULL; 273 err_dev_addr_get: 274 free_netdev(dev); 275 err_alloc_etherdev: 276 mlxsw_core_port_fini(mlxsw_m->core, local_port); 277 return err; 278 } 279 280 static void mlxsw_m_port_remove(struct mlxsw_m *mlxsw_m, u8 local_port) 281 { 282 struct mlxsw_m_port *mlxsw_m_port = mlxsw_m->ports[local_port]; 283 284 mlxsw_core_port_clear(mlxsw_m->core, local_port, mlxsw_m); 285 unregister_netdev(mlxsw_m_port->dev); /* This calls ndo_stop */ 286 mlxsw_m->ports[local_port] = NULL; 287 free_netdev(mlxsw_m_port->dev); 288 mlxsw_core_port_fini(mlxsw_m->core, local_port); 289 } 290 291 static int mlxsw_m_port_module_map(struct mlxsw_m *mlxsw_m, u8 local_port, 292 u8 *last_module) 293 { 294 unsigned int max_ports = mlxsw_core_max_ports(mlxsw_m->core); 295 u8 module, width; 296 int err; 297 298 /* Fill out to local port mapping array */ 299 err = mlxsw_m_port_module_info_get(mlxsw_m, local_port, &module, 300 &width); 301 if (err) 302 return err; 303 304 if (!width) 305 return 0; 306 /* Skip, if port belongs to the cluster */ 307 if (module == *last_module) 308 return 0; 309 *last_module = module; 310 311 if (WARN_ON_ONCE(module >= max_ports)) 312 return -EINVAL; 313 mlxsw_env_module_port_map(mlxsw_m->core, module); 314 mlxsw_m->module_to_port[module] = ++mlxsw_m->max_ports; 315 316 return 0; 317 } 318 319 static void mlxsw_m_port_module_unmap(struct mlxsw_m *mlxsw_m, u8 module) 320 { 321 mlxsw_m->module_to_port[module] = -1; 322 mlxsw_env_module_port_unmap(mlxsw_m->core, module); 323 } 324 325 static int mlxsw_m_ports_create(struct mlxsw_m *mlxsw_m) 326 { 327 unsigned int max_ports = mlxsw_core_max_ports(mlxsw_m->core); 328 u8 last_module = max_ports; 329 int i; 330 int err; 331 332 mlxsw_m->ports = kcalloc(max_ports, sizeof(*mlxsw_m->ports), 333 GFP_KERNEL); 334 if (!mlxsw_m->ports) 335 return -ENOMEM; 336 337 mlxsw_m->module_to_port = kmalloc_array(max_ports, sizeof(int), 338 GFP_KERNEL); 339 if (!mlxsw_m->module_to_port) { 340 err = -ENOMEM; 341 goto err_module_to_port_alloc; 342 } 343 344 /* Invalidate the entries of module to local port mapping array */ 345 for (i = 0; i < max_ports; i++) 346 mlxsw_m->module_to_port[i] = -1; 347 348 /* Fill out module to local port mapping array */ 349 for (i = 1; i < max_ports; i++) { 350 err = mlxsw_m_port_module_map(mlxsw_m, i, &last_module); 351 if (err) 352 goto err_module_to_port_map; 353 } 354 355 /* Create port objects for each valid entry */ 356 for (i = 0; i < mlxsw_m->max_ports; i++) { 357 if (mlxsw_m->module_to_port[i] > 0 && 358 !mlxsw_core_port_is_xm(mlxsw_m->core, i)) { 359 err = mlxsw_m_port_create(mlxsw_m, 360 mlxsw_m->module_to_port[i], 361 i); 362 if (err) 363 goto err_module_to_port_create; 364 } 365 } 366 367 return 0; 368 369 err_module_to_port_create: 370 for (i--; i >= 0; i--) { 371 if (mlxsw_m->module_to_port[i] > 0) 372 mlxsw_m_port_remove(mlxsw_m, 373 mlxsw_m->module_to_port[i]); 374 } 375 i = max_ports; 376 err_module_to_port_map: 377 for (i--; i > 0; i--) 378 mlxsw_m_port_module_unmap(mlxsw_m, i); 379 kfree(mlxsw_m->module_to_port); 380 err_module_to_port_alloc: 381 kfree(mlxsw_m->ports); 382 return err; 383 } 384 385 static void mlxsw_m_ports_remove(struct mlxsw_m *mlxsw_m) 386 { 387 int i; 388 389 for (i = 0; i < mlxsw_m->max_ports; i++) { 390 if (mlxsw_m->module_to_port[i] > 0) { 391 mlxsw_m_port_remove(mlxsw_m, 392 mlxsw_m->module_to_port[i]); 393 mlxsw_m_port_module_unmap(mlxsw_m, i); 394 } 395 } 396 397 kfree(mlxsw_m->module_to_port); 398 kfree(mlxsw_m->ports); 399 } 400 401 static int mlxsw_m_fw_rev_validate(struct mlxsw_m *mlxsw_m) 402 { 403 const struct mlxsw_fw_rev *rev = &mlxsw_m->bus_info->fw_rev; 404 405 /* Validate driver and FW are compatible. 406 * Do not check major version, since it defines chip type, while 407 * driver is supposed to support any type. 408 */ 409 if (mlxsw_core_fw_rev_minor_subminor_validate(rev, &mlxsw_m_fw_rev)) 410 return 0; 411 412 dev_err(mlxsw_m->bus_info->dev, "The firmware version %d.%d.%d is incompatible with the driver (required >= %d.%d.%d)\n", 413 rev->major, rev->minor, rev->subminor, rev->major, 414 mlxsw_m_fw_rev.minor, mlxsw_m_fw_rev.subminor); 415 416 return -EINVAL; 417 } 418 419 static int mlxsw_m_init(struct mlxsw_core *mlxsw_core, 420 const struct mlxsw_bus_info *mlxsw_bus_info, 421 struct netlink_ext_ack *extack) 422 { 423 struct mlxsw_m *mlxsw_m = mlxsw_core_driver_priv(mlxsw_core); 424 int err; 425 426 mlxsw_m->core = mlxsw_core; 427 mlxsw_m->bus_info = mlxsw_bus_info; 428 429 err = mlxsw_m_fw_rev_validate(mlxsw_m); 430 if (err) 431 return err; 432 433 err = mlxsw_m_base_mac_get(mlxsw_m); 434 if (err) { 435 dev_err(mlxsw_m->bus_info->dev, "Failed to get base mac\n"); 436 return err; 437 } 438 439 err = mlxsw_m_ports_create(mlxsw_m); 440 if (err) { 441 dev_err(mlxsw_m->bus_info->dev, "Failed to create ports\n"); 442 return err; 443 } 444 445 return 0; 446 } 447 448 static void mlxsw_m_fini(struct mlxsw_core *mlxsw_core) 449 { 450 struct mlxsw_m *mlxsw_m = mlxsw_core_driver_priv(mlxsw_core); 451 452 mlxsw_m_ports_remove(mlxsw_m); 453 } 454 455 static const struct mlxsw_config_profile mlxsw_m_config_profile; 456 457 static struct mlxsw_driver mlxsw_m_driver = { 458 .kind = mlxsw_m_driver_name, 459 .priv_size = sizeof(struct mlxsw_m), 460 .init = mlxsw_m_init, 461 .fini = mlxsw_m_fini, 462 .profile = &mlxsw_m_config_profile, 463 .res_query_enabled = true, 464 }; 465 466 static const struct i2c_device_id mlxsw_m_i2c_id[] = { 467 { "mlxsw_minimal", 0}, 468 { }, 469 }; 470 471 static struct i2c_driver mlxsw_m_i2c_driver = { 472 .driver.name = "mlxsw_minimal", 473 .class = I2C_CLASS_HWMON, 474 .id_table = mlxsw_m_i2c_id, 475 }; 476 477 static int __init mlxsw_m_module_init(void) 478 { 479 int err; 480 481 err = mlxsw_core_driver_register(&mlxsw_m_driver); 482 if (err) 483 return err; 484 485 err = mlxsw_i2c_driver_register(&mlxsw_m_i2c_driver); 486 if (err) 487 goto err_i2c_driver_register; 488 489 return 0; 490 491 err_i2c_driver_register: 492 mlxsw_core_driver_unregister(&mlxsw_m_driver); 493 494 return err; 495 } 496 497 static void __exit mlxsw_m_module_exit(void) 498 { 499 mlxsw_i2c_driver_unregister(&mlxsw_m_i2c_driver); 500 mlxsw_core_driver_unregister(&mlxsw_m_driver); 501 } 502 503 module_init(mlxsw_m_module_init); 504 module_exit(mlxsw_m_module_exit); 505 506 MODULE_LICENSE("Dual BSD/GPL"); 507 MODULE_AUTHOR("Vadim Pasternak <vadimp@mellanox.com>"); 508 MODULE_DESCRIPTION("Mellanox minimal driver"); 509 MODULE_DEVICE_TABLE(i2c, mlxsw_m_i2c_id); 510