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 struct net_device *dev = mlxsw_m_port->dev; 204 char ppad_pl[MLXSW_REG_PPAD_LEN]; 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, dev->dev_addr); 212 /* The last byte value in base mac address is guaranteed 213 * to be such it does not overflow when adding local_port 214 * value. 215 */ 216 dev->dev_addr[ETH_ALEN - 1] += mlxsw_m_port->module + 1; 217 return 0; 218 } 219 220 static int 221 mlxsw_m_port_create(struct mlxsw_m *mlxsw_m, u8 local_port, u8 module) 222 { 223 struct mlxsw_m_port *mlxsw_m_port; 224 struct net_device *dev; 225 int err; 226 227 err = mlxsw_core_port_init(mlxsw_m->core, local_port, 228 module + 1, false, 0, false, 229 0, mlxsw_m->base_mac, 230 sizeof(mlxsw_m->base_mac)); 231 if (err) { 232 dev_err(mlxsw_m->bus_info->dev, "Port %d: Failed to init core port\n", 233 local_port); 234 return err; 235 } 236 237 dev = alloc_etherdev(sizeof(struct mlxsw_m_port)); 238 if (!dev) { 239 err = -ENOMEM; 240 goto err_alloc_etherdev; 241 } 242 243 SET_NETDEV_DEV(dev, mlxsw_m->bus_info->dev); 244 dev_net_set(dev, mlxsw_core_net(mlxsw_m->core)); 245 mlxsw_m_port = netdev_priv(dev); 246 mlxsw_m_port->dev = dev; 247 mlxsw_m_port->mlxsw_m = mlxsw_m; 248 mlxsw_m_port->local_port = local_port; 249 mlxsw_m_port->module = module; 250 251 dev->netdev_ops = &mlxsw_m_port_netdev_ops; 252 dev->ethtool_ops = &mlxsw_m_port_ethtool_ops; 253 254 err = mlxsw_m_port_dev_addr_get(mlxsw_m_port); 255 if (err) { 256 dev_err(mlxsw_m->bus_info->dev, "Port %d: Unable to get port mac address\n", 257 mlxsw_m_port->local_port); 258 goto err_dev_addr_get; 259 } 260 261 netif_carrier_off(dev); 262 mlxsw_m->ports[local_port] = mlxsw_m_port; 263 err = register_netdev(dev); 264 if (err) { 265 dev_err(mlxsw_m->bus_info->dev, "Port %d: Failed to register netdev\n", 266 mlxsw_m_port->local_port); 267 goto err_register_netdev; 268 } 269 270 mlxsw_core_port_eth_set(mlxsw_m->core, mlxsw_m_port->local_port, 271 mlxsw_m_port, dev); 272 273 return 0; 274 275 err_register_netdev: 276 mlxsw_m->ports[local_port] = NULL; 277 err_dev_addr_get: 278 free_netdev(dev); 279 err_alloc_etherdev: 280 mlxsw_core_port_fini(mlxsw_m->core, local_port); 281 return err; 282 } 283 284 static void mlxsw_m_port_remove(struct mlxsw_m *mlxsw_m, u8 local_port) 285 { 286 struct mlxsw_m_port *mlxsw_m_port = mlxsw_m->ports[local_port]; 287 288 mlxsw_core_port_clear(mlxsw_m->core, local_port, mlxsw_m); 289 unregister_netdev(mlxsw_m_port->dev); /* This calls ndo_stop */ 290 mlxsw_m->ports[local_port] = NULL; 291 free_netdev(mlxsw_m_port->dev); 292 mlxsw_core_port_fini(mlxsw_m->core, local_port); 293 } 294 295 static int mlxsw_m_port_module_map(struct mlxsw_m *mlxsw_m, u8 local_port, 296 u8 *last_module) 297 { 298 unsigned int max_ports = mlxsw_core_max_ports(mlxsw_m->core); 299 u8 module, width; 300 int err; 301 302 /* Fill out to local port mapping array */ 303 err = mlxsw_m_port_module_info_get(mlxsw_m, local_port, &module, 304 &width); 305 if (err) 306 return err; 307 308 if (!width) 309 return 0; 310 /* Skip, if port belongs to the cluster */ 311 if (module == *last_module) 312 return 0; 313 *last_module = module; 314 315 if (WARN_ON_ONCE(module >= max_ports)) 316 return -EINVAL; 317 mlxsw_env_module_port_map(mlxsw_m->core, module); 318 mlxsw_m->module_to_port[module] = ++mlxsw_m->max_ports; 319 320 return 0; 321 } 322 323 static void mlxsw_m_port_module_unmap(struct mlxsw_m *mlxsw_m, u8 module) 324 { 325 mlxsw_m->module_to_port[module] = -1; 326 mlxsw_env_module_port_unmap(mlxsw_m->core, module); 327 } 328 329 static int mlxsw_m_ports_create(struct mlxsw_m *mlxsw_m) 330 { 331 unsigned int max_ports = mlxsw_core_max_ports(mlxsw_m->core); 332 u8 last_module = max_ports; 333 int i; 334 int err; 335 336 mlxsw_m->ports = kcalloc(max_ports, sizeof(*mlxsw_m->ports), 337 GFP_KERNEL); 338 if (!mlxsw_m->ports) 339 return -ENOMEM; 340 341 mlxsw_m->module_to_port = kmalloc_array(max_ports, sizeof(int), 342 GFP_KERNEL); 343 if (!mlxsw_m->module_to_port) { 344 err = -ENOMEM; 345 goto err_module_to_port_alloc; 346 } 347 348 /* Invalidate the entries of module to local port mapping array */ 349 for (i = 0; i < max_ports; i++) 350 mlxsw_m->module_to_port[i] = -1; 351 352 /* Fill out module to local port mapping array */ 353 for (i = 1; i < max_ports; i++) { 354 err = mlxsw_m_port_module_map(mlxsw_m, i, &last_module); 355 if (err) 356 goto err_module_to_port_map; 357 } 358 359 /* Create port objects for each valid entry */ 360 for (i = 0; i < mlxsw_m->max_ports; i++) { 361 if (mlxsw_m->module_to_port[i] > 0 && 362 !mlxsw_core_port_is_xm(mlxsw_m->core, i)) { 363 err = mlxsw_m_port_create(mlxsw_m, 364 mlxsw_m->module_to_port[i], 365 i); 366 if (err) 367 goto err_module_to_port_create; 368 } 369 } 370 371 return 0; 372 373 err_module_to_port_create: 374 for (i--; i >= 0; i--) { 375 if (mlxsw_m->module_to_port[i] > 0) 376 mlxsw_m_port_remove(mlxsw_m, 377 mlxsw_m->module_to_port[i]); 378 } 379 i = max_ports; 380 err_module_to_port_map: 381 for (i--; i > 0; i--) 382 mlxsw_m_port_module_unmap(mlxsw_m, i); 383 kfree(mlxsw_m->module_to_port); 384 err_module_to_port_alloc: 385 kfree(mlxsw_m->ports); 386 return err; 387 } 388 389 static void mlxsw_m_ports_remove(struct mlxsw_m *mlxsw_m) 390 { 391 int i; 392 393 for (i = 0; i < mlxsw_m->max_ports; i++) { 394 if (mlxsw_m->module_to_port[i] > 0) { 395 mlxsw_m_port_remove(mlxsw_m, 396 mlxsw_m->module_to_port[i]); 397 mlxsw_m_port_module_unmap(mlxsw_m, i); 398 } 399 } 400 401 kfree(mlxsw_m->module_to_port); 402 kfree(mlxsw_m->ports); 403 } 404 405 static int mlxsw_m_fw_rev_validate(struct mlxsw_m *mlxsw_m) 406 { 407 const struct mlxsw_fw_rev *rev = &mlxsw_m->bus_info->fw_rev; 408 409 /* Validate driver and FW are compatible. 410 * Do not check major version, since it defines chip type, while 411 * driver is supposed to support any type. 412 */ 413 if (mlxsw_core_fw_rev_minor_subminor_validate(rev, &mlxsw_m_fw_rev)) 414 return 0; 415 416 dev_err(mlxsw_m->bus_info->dev, "The firmware version %d.%d.%d is incompatible with the driver (required >= %d.%d.%d)\n", 417 rev->major, rev->minor, rev->subminor, rev->major, 418 mlxsw_m_fw_rev.minor, mlxsw_m_fw_rev.subminor); 419 420 return -EINVAL; 421 } 422 423 static int mlxsw_m_init(struct mlxsw_core *mlxsw_core, 424 const struct mlxsw_bus_info *mlxsw_bus_info, 425 struct netlink_ext_ack *extack) 426 { 427 struct mlxsw_m *mlxsw_m = mlxsw_core_driver_priv(mlxsw_core); 428 int err; 429 430 mlxsw_m->core = mlxsw_core; 431 mlxsw_m->bus_info = mlxsw_bus_info; 432 433 err = mlxsw_m_fw_rev_validate(mlxsw_m); 434 if (err) 435 return err; 436 437 err = mlxsw_m_base_mac_get(mlxsw_m); 438 if (err) { 439 dev_err(mlxsw_m->bus_info->dev, "Failed to get base mac\n"); 440 return err; 441 } 442 443 err = mlxsw_m_ports_create(mlxsw_m); 444 if (err) { 445 dev_err(mlxsw_m->bus_info->dev, "Failed to create ports\n"); 446 return err; 447 } 448 449 return 0; 450 } 451 452 static void mlxsw_m_fini(struct mlxsw_core *mlxsw_core) 453 { 454 struct mlxsw_m *mlxsw_m = mlxsw_core_driver_priv(mlxsw_core); 455 456 mlxsw_m_ports_remove(mlxsw_m); 457 } 458 459 static const struct mlxsw_config_profile mlxsw_m_config_profile; 460 461 static struct mlxsw_driver mlxsw_m_driver = { 462 .kind = mlxsw_m_driver_name, 463 .priv_size = sizeof(struct mlxsw_m), 464 .init = mlxsw_m_init, 465 .fini = mlxsw_m_fini, 466 .profile = &mlxsw_m_config_profile, 467 .res_query_enabled = true, 468 }; 469 470 static const struct i2c_device_id mlxsw_m_i2c_id[] = { 471 { "mlxsw_minimal", 0}, 472 { }, 473 }; 474 475 static struct i2c_driver mlxsw_m_i2c_driver = { 476 .driver.name = "mlxsw_minimal", 477 .class = I2C_CLASS_HWMON, 478 .id_table = mlxsw_m_i2c_id, 479 }; 480 481 static int __init mlxsw_m_module_init(void) 482 { 483 int err; 484 485 err = mlxsw_core_driver_register(&mlxsw_m_driver); 486 if (err) 487 return err; 488 489 err = mlxsw_i2c_driver_register(&mlxsw_m_i2c_driver); 490 if (err) 491 goto err_i2c_driver_register; 492 493 return 0; 494 495 err_i2c_driver_register: 496 mlxsw_core_driver_unregister(&mlxsw_m_driver); 497 498 return err; 499 } 500 501 static void __exit mlxsw_m_module_exit(void) 502 { 503 mlxsw_i2c_driver_unregister(&mlxsw_m_i2c_driver); 504 mlxsw_core_driver_unregister(&mlxsw_m_driver); 505 } 506 507 module_init(mlxsw_m_module_init); 508 module_exit(mlxsw_m_module_exit); 509 510 MODULE_LICENSE("Dual BSD/GPL"); 511 MODULE_AUTHOR("Vadim Pasternak <vadimp@mellanox.com>"); 512 MODULE_DESCRIPTION("Mellanox minimal driver"); 513 MODULE_DEVICE_TABLE(i2c, mlxsw_m_i2c_id); 514