1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* Texas Instruments K3 AM65 Ethernet Switchdev Driver 3 * 4 * Copyright (C) 2020 Texas Instruments Incorporated - https://www.ti.com/ 5 * 6 */ 7 8 #include <linux/etherdevice.h> 9 #include <linux/if_bridge.h> 10 #include <linux/netdevice.h> 11 #include <linux/workqueue.h> 12 #include <net/switchdev.h> 13 14 #include "am65-cpsw-nuss.h" 15 #include "am65-cpsw-switchdev.h" 16 #include "cpsw_ale.h" 17 18 struct am65_cpsw_switchdev_event_work { 19 struct work_struct work; 20 struct switchdev_notifier_fdb_info fdb_info; 21 struct am65_cpsw_port *port; 22 unsigned long event; 23 }; 24 25 static int am65_cpsw_port_stp_state_set(struct am65_cpsw_port *port, u8 state) 26 { 27 struct am65_cpsw_common *cpsw = port->common; 28 u8 cpsw_state; 29 int ret = 0; 30 31 switch (state) { 32 case BR_STATE_FORWARDING: 33 cpsw_state = ALE_PORT_STATE_FORWARD; 34 break; 35 case BR_STATE_LEARNING: 36 cpsw_state = ALE_PORT_STATE_LEARN; 37 break; 38 case BR_STATE_DISABLED: 39 cpsw_state = ALE_PORT_STATE_DISABLE; 40 break; 41 case BR_STATE_LISTENING: 42 case BR_STATE_BLOCKING: 43 cpsw_state = ALE_PORT_STATE_BLOCK; 44 break; 45 default: 46 return -EOPNOTSUPP; 47 } 48 49 ret = cpsw_ale_control_set(cpsw->ale, port->port_id, 50 ALE_PORT_STATE, cpsw_state); 51 netdev_dbg(port->ndev, "ale state: %u\n", cpsw_state); 52 53 return ret; 54 } 55 56 static int am65_cpsw_port_attr_br_flags_set(struct am65_cpsw_port *port, 57 struct net_device *orig_dev, 58 struct switchdev_brport_flags flags) 59 { 60 struct am65_cpsw_common *cpsw = port->common; 61 62 if (flags.mask & BR_MCAST_FLOOD) { 63 bool unreg_mcast_add = false; 64 65 if (flags.val & BR_MCAST_FLOOD) 66 unreg_mcast_add = true; 67 68 netdev_dbg(port->ndev, "BR_MCAST_FLOOD: %d port %u\n", 69 unreg_mcast_add, port->port_id); 70 71 cpsw_ale_set_unreg_mcast(cpsw->ale, BIT(port->port_id), 72 unreg_mcast_add); 73 } 74 75 return 0; 76 } 77 78 static int am65_cpsw_port_attr_br_flags_pre_set(struct net_device *netdev, 79 struct switchdev_brport_flags flags) 80 { 81 if (flags.mask & ~(BR_LEARNING | BR_MCAST_FLOOD)) 82 return -EINVAL; 83 84 return 0; 85 } 86 87 static int am65_cpsw_port_attr_set(struct net_device *ndev, const void *ctx, 88 const struct switchdev_attr *attr, 89 struct netlink_ext_ack *extack) 90 { 91 struct am65_cpsw_port *port = am65_ndev_to_port(ndev); 92 int ret; 93 94 netdev_dbg(ndev, "attr: id %u port: %u\n", attr->id, port->port_id); 95 96 switch (attr->id) { 97 case SWITCHDEV_ATTR_ID_PORT_PRE_BRIDGE_FLAGS: 98 ret = am65_cpsw_port_attr_br_flags_pre_set(ndev, 99 attr->u.brport_flags); 100 break; 101 case SWITCHDEV_ATTR_ID_PORT_STP_STATE: 102 ret = am65_cpsw_port_stp_state_set(port, attr->u.stp_state); 103 netdev_dbg(ndev, "stp state: %u\n", attr->u.stp_state); 104 break; 105 case SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS: 106 ret = am65_cpsw_port_attr_br_flags_set(port, attr->orig_dev, 107 attr->u.brport_flags); 108 break; 109 default: 110 ret = -EOPNOTSUPP; 111 break; 112 } 113 114 return ret; 115 } 116 117 static u16 am65_cpsw_get_pvid(struct am65_cpsw_port *port) 118 { 119 struct am65_cpsw_common *cpsw = port->common; 120 struct am65_cpsw_host *host_p = am65_common_get_host(cpsw); 121 u32 pvid; 122 123 if (port->port_id) 124 pvid = readl(port->port_base + AM65_CPSW_PORT_VLAN_REG_OFFSET); 125 else 126 pvid = readl(host_p->port_base + AM65_CPSW_PORT_VLAN_REG_OFFSET); 127 128 pvid = pvid & 0xfff; 129 130 return pvid; 131 } 132 133 static void am65_cpsw_set_pvid(struct am65_cpsw_port *port, u16 vid, bool cfi, u32 cos) 134 { 135 struct am65_cpsw_common *cpsw = port->common; 136 struct am65_cpsw_host *host_p = am65_common_get_host(cpsw); 137 u32 pvid; 138 139 pvid = vid; 140 pvid |= cfi ? BIT(12) : 0; 141 pvid |= (cos & 0x7) << 13; 142 143 if (port->port_id) 144 writel(pvid, port->port_base + AM65_CPSW_PORT_VLAN_REG_OFFSET); 145 else 146 writel(pvid, host_p->port_base + AM65_CPSW_PORT_VLAN_REG_OFFSET); 147 } 148 149 static int am65_cpsw_port_vlan_add(struct am65_cpsw_port *port, bool untag, bool pvid, 150 u16 vid, struct net_device *orig_dev) 151 { 152 bool cpu_port = netif_is_bridge_master(orig_dev); 153 struct am65_cpsw_common *cpsw = port->common; 154 int unreg_mcast_mask = 0; 155 int reg_mcast_mask = 0; 156 int untag_mask = 0; 157 int port_mask; 158 int ret = 0; 159 u32 flags; 160 161 if (cpu_port) { 162 port_mask = BIT(HOST_PORT_NUM); 163 flags = orig_dev->flags; 164 unreg_mcast_mask = port_mask; 165 } else { 166 port_mask = BIT(port->port_id); 167 flags = port->ndev->flags; 168 } 169 170 if (flags & IFF_MULTICAST) 171 reg_mcast_mask = port_mask; 172 173 if (untag) 174 untag_mask = port_mask; 175 176 ret = cpsw_ale_vlan_add_modify(cpsw->ale, vid, port_mask, untag_mask, 177 reg_mcast_mask, unreg_mcast_mask); 178 if (ret) { 179 netdev_err(port->ndev, "Unable to add vlan\n"); 180 return ret; 181 } 182 183 if (cpu_port) 184 cpsw_ale_add_ucast(cpsw->ale, port->slave.mac_addr, 185 HOST_PORT_NUM, ALE_VLAN | ALE_SECURE, vid); 186 if (!pvid) 187 return ret; 188 189 am65_cpsw_set_pvid(port, vid, 0, 0); 190 191 netdev_dbg(port->ndev, "VID add: %s: vid:%u ports:%X\n", 192 port->ndev->name, vid, port_mask); 193 194 return ret; 195 } 196 197 static int am65_cpsw_port_vlan_del(struct am65_cpsw_port *port, u16 vid, 198 struct net_device *orig_dev) 199 { 200 bool cpu_port = netif_is_bridge_master(orig_dev); 201 struct am65_cpsw_common *cpsw = port->common; 202 int port_mask; 203 int ret = 0; 204 205 if (cpu_port) 206 port_mask = BIT(HOST_PORT_NUM); 207 else 208 port_mask = BIT(port->port_id); 209 210 ret = cpsw_ale_del_vlan(cpsw->ale, vid, port_mask); 211 if (ret != 0) 212 return ret; 213 214 /* We don't care for the return value here, error is returned only if 215 * the unicast entry is not present 216 */ 217 if (cpu_port) 218 cpsw_ale_del_ucast(cpsw->ale, port->slave.mac_addr, 219 HOST_PORT_NUM, ALE_VLAN, vid); 220 221 if (vid == am65_cpsw_get_pvid(port)) 222 am65_cpsw_set_pvid(port, 0, 0, 0); 223 224 /* We don't care for the return value here, error is returned only if 225 * the multicast entry is not present 226 */ 227 cpsw_ale_del_mcast(cpsw->ale, port->ndev->broadcast, port_mask, 228 ALE_VLAN, vid); 229 netdev_dbg(port->ndev, "VID del: %s: vid:%u ports:%X\n", 230 port->ndev->name, vid, port_mask); 231 232 return ret; 233 } 234 235 static int am65_cpsw_port_vlans_add(struct am65_cpsw_port *port, 236 const struct switchdev_obj_port_vlan *vlan) 237 { 238 bool untag = vlan->flags & BRIDGE_VLAN_INFO_UNTAGGED; 239 struct net_device *orig_dev = vlan->obj.orig_dev; 240 bool cpu_port = netif_is_bridge_master(orig_dev); 241 bool pvid = vlan->flags & BRIDGE_VLAN_INFO_PVID; 242 243 netdev_dbg(port->ndev, "VID add: %s: vid:%u flags:%X\n", 244 port->ndev->name, vlan->vid, vlan->flags); 245 246 if (cpu_port && !(vlan->flags & BRIDGE_VLAN_INFO_BRENTRY)) 247 return 0; 248 249 return am65_cpsw_port_vlan_add(port, untag, pvid, vlan->vid, orig_dev); 250 } 251 252 static int am65_cpsw_port_vlans_del(struct am65_cpsw_port *port, 253 const struct switchdev_obj_port_vlan *vlan) 254 255 { 256 return am65_cpsw_port_vlan_del(port, vlan->vid, vlan->obj.orig_dev); 257 } 258 259 static int am65_cpsw_port_mdb_add(struct am65_cpsw_port *port, 260 struct switchdev_obj_port_mdb *mdb) 261 262 { 263 struct net_device *orig_dev = mdb->obj.orig_dev; 264 bool cpu_port = netif_is_bridge_master(orig_dev); 265 struct am65_cpsw_common *cpsw = port->common; 266 int port_mask; 267 int err; 268 269 if (cpu_port) 270 port_mask = BIT(HOST_PORT_NUM); 271 else 272 port_mask = BIT(port->port_id); 273 274 err = cpsw_ale_add_mcast(cpsw->ale, mdb->addr, port_mask, 275 ALE_VLAN, mdb->vid, 0); 276 netdev_dbg(port->ndev, "MDB add: %s: vid %u:%pM ports: %X\n", 277 port->ndev->name, mdb->vid, mdb->addr, port_mask); 278 279 return err; 280 } 281 282 static int am65_cpsw_port_mdb_del(struct am65_cpsw_port *port, 283 struct switchdev_obj_port_mdb *mdb) 284 285 { 286 struct net_device *orig_dev = mdb->obj.orig_dev; 287 bool cpu_port = netif_is_bridge_master(orig_dev); 288 struct am65_cpsw_common *cpsw = port->common; 289 int del_mask; 290 291 if (cpu_port) 292 del_mask = BIT(HOST_PORT_NUM); 293 else 294 del_mask = BIT(port->port_id); 295 296 /* Ignore error as error code is returned only when entry is already removed */ 297 cpsw_ale_del_mcast(cpsw->ale, mdb->addr, del_mask, 298 ALE_VLAN, mdb->vid); 299 netdev_dbg(port->ndev, "MDB del: %s: vid %u:%pM ports: %X\n", 300 port->ndev->name, mdb->vid, mdb->addr, del_mask); 301 302 return 0; 303 } 304 305 static int am65_cpsw_port_obj_add(struct net_device *ndev, const void *ctx, 306 const struct switchdev_obj *obj, 307 struct netlink_ext_ack *extack) 308 { 309 struct switchdev_obj_port_vlan *vlan = SWITCHDEV_OBJ_PORT_VLAN(obj); 310 struct switchdev_obj_port_mdb *mdb = SWITCHDEV_OBJ_PORT_MDB(obj); 311 struct am65_cpsw_port *port = am65_ndev_to_port(ndev); 312 int err = 0; 313 314 netdev_dbg(ndev, "obj_add: id %u port: %u\n", obj->id, port->port_id); 315 316 switch (obj->id) { 317 case SWITCHDEV_OBJ_ID_PORT_VLAN: 318 err = am65_cpsw_port_vlans_add(port, vlan); 319 break; 320 case SWITCHDEV_OBJ_ID_PORT_MDB: 321 case SWITCHDEV_OBJ_ID_HOST_MDB: 322 err = am65_cpsw_port_mdb_add(port, mdb); 323 break; 324 default: 325 err = -EOPNOTSUPP; 326 break; 327 } 328 329 return err; 330 } 331 332 static int am65_cpsw_port_obj_del(struct net_device *ndev, const void *ctx, 333 const struct switchdev_obj *obj) 334 { 335 struct switchdev_obj_port_vlan *vlan = SWITCHDEV_OBJ_PORT_VLAN(obj); 336 struct switchdev_obj_port_mdb *mdb = SWITCHDEV_OBJ_PORT_MDB(obj); 337 struct am65_cpsw_port *port = am65_ndev_to_port(ndev); 338 int err = 0; 339 340 netdev_dbg(ndev, "obj_del: id %u port: %u\n", obj->id, port->port_id); 341 342 switch (obj->id) { 343 case SWITCHDEV_OBJ_ID_PORT_VLAN: 344 err = am65_cpsw_port_vlans_del(port, vlan); 345 break; 346 case SWITCHDEV_OBJ_ID_PORT_MDB: 347 case SWITCHDEV_OBJ_ID_HOST_MDB: 348 err = am65_cpsw_port_mdb_del(port, mdb); 349 break; 350 default: 351 err = -EOPNOTSUPP; 352 break; 353 } 354 355 return err; 356 } 357 358 static void am65_cpsw_fdb_offload_notify(struct net_device *ndev, 359 struct switchdev_notifier_fdb_info *rcv) 360 { 361 struct switchdev_notifier_fdb_info info = {}; 362 363 info.addr = rcv->addr; 364 info.vid = rcv->vid; 365 info.offloaded = true; 366 call_switchdev_notifiers(SWITCHDEV_FDB_OFFLOADED, 367 ndev, &info.info, NULL); 368 } 369 370 static void am65_cpsw_switchdev_event_work(struct work_struct *work) 371 { 372 struct am65_cpsw_switchdev_event_work *switchdev_work = 373 container_of(work, struct am65_cpsw_switchdev_event_work, work); 374 struct am65_cpsw_port *port = switchdev_work->port; 375 struct switchdev_notifier_fdb_info *fdb; 376 struct am65_cpsw_common *cpsw = port->common; 377 int port_id = port->port_id; 378 379 rtnl_lock(); 380 switch (switchdev_work->event) { 381 case SWITCHDEV_FDB_ADD_TO_DEVICE: 382 fdb = &switchdev_work->fdb_info; 383 384 netdev_dbg(port->ndev, "cpsw_fdb_add: MACID = %pM vid = %u flags = %u %u -- port %d\n", 385 fdb->addr, fdb->vid, fdb->added_by_user, 386 fdb->offloaded, port_id); 387 388 if (!fdb->added_by_user || fdb->is_local) 389 break; 390 if (memcmp(port->slave.mac_addr, (u8 *)fdb->addr, ETH_ALEN) == 0) 391 port_id = HOST_PORT_NUM; 392 393 cpsw_ale_add_ucast(cpsw->ale, (u8 *)fdb->addr, port_id, 394 fdb->vid ? ALE_VLAN : 0, fdb->vid); 395 am65_cpsw_fdb_offload_notify(port->ndev, fdb); 396 break; 397 case SWITCHDEV_FDB_DEL_TO_DEVICE: 398 fdb = &switchdev_work->fdb_info; 399 400 netdev_dbg(port->ndev, "cpsw_fdb_del: MACID = %pM vid = %u flags = %u %u -- port %d\n", 401 fdb->addr, fdb->vid, fdb->added_by_user, 402 fdb->offloaded, port_id); 403 404 if (!fdb->added_by_user || fdb->is_local) 405 break; 406 if (memcmp(port->slave.mac_addr, (u8 *)fdb->addr, ETH_ALEN) == 0) 407 port_id = HOST_PORT_NUM; 408 409 cpsw_ale_del_ucast(cpsw->ale, (u8 *)fdb->addr, port_id, 410 fdb->vid ? ALE_VLAN : 0, fdb->vid); 411 break; 412 default: 413 break; 414 } 415 rtnl_unlock(); 416 417 kfree(switchdev_work->fdb_info.addr); 418 kfree(switchdev_work); 419 dev_put(port->ndev); 420 } 421 422 /* called under rcu_read_lock() */ 423 static int am65_cpsw_switchdev_event(struct notifier_block *unused, 424 unsigned long event, void *ptr) 425 { 426 struct net_device *ndev = switchdev_notifier_info_to_dev(ptr); 427 struct am65_cpsw_switchdev_event_work *switchdev_work; 428 struct am65_cpsw_port *port = am65_ndev_to_port(ndev); 429 struct switchdev_notifier_fdb_info *fdb_info = ptr; 430 int err; 431 432 if (event == SWITCHDEV_PORT_ATTR_SET) { 433 err = switchdev_handle_port_attr_set(ndev, ptr, 434 am65_cpsw_port_dev_check, 435 am65_cpsw_port_attr_set); 436 return notifier_from_errno(err); 437 } 438 439 if (!am65_cpsw_port_dev_check(ndev)) 440 return NOTIFY_DONE; 441 442 switchdev_work = kzalloc(sizeof(*switchdev_work), GFP_ATOMIC); 443 if (WARN_ON(!switchdev_work)) 444 return NOTIFY_BAD; 445 446 INIT_WORK(&switchdev_work->work, am65_cpsw_switchdev_event_work); 447 switchdev_work->port = port; 448 switchdev_work->event = event; 449 450 switch (event) { 451 case SWITCHDEV_FDB_ADD_TO_DEVICE: 452 case SWITCHDEV_FDB_DEL_TO_DEVICE: 453 memcpy(&switchdev_work->fdb_info, ptr, 454 sizeof(switchdev_work->fdb_info)); 455 switchdev_work->fdb_info.addr = kzalloc(ETH_ALEN, GFP_ATOMIC); 456 if (!switchdev_work->fdb_info.addr) 457 goto err_addr_alloc; 458 ether_addr_copy((u8 *)switchdev_work->fdb_info.addr, 459 fdb_info->addr); 460 dev_hold(ndev); 461 break; 462 default: 463 kfree(switchdev_work); 464 return NOTIFY_DONE; 465 } 466 467 queue_work(system_long_wq, &switchdev_work->work); 468 469 return NOTIFY_DONE; 470 471 err_addr_alloc: 472 kfree(switchdev_work); 473 return NOTIFY_BAD; 474 } 475 476 static struct notifier_block cpsw_switchdev_notifier = { 477 .notifier_call = am65_cpsw_switchdev_event, 478 }; 479 480 static int am65_cpsw_switchdev_blocking_event(struct notifier_block *unused, 481 unsigned long event, void *ptr) 482 { 483 struct net_device *dev = switchdev_notifier_info_to_dev(ptr); 484 int err; 485 486 switch (event) { 487 case SWITCHDEV_PORT_OBJ_ADD: 488 err = switchdev_handle_port_obj_add(dev, ptr, 489 am65_cpsw_port_dev_check, 490 am65_cpsw_port_obj_add); 491 return notifier_from_errno(err); 492 case SWITCHDEV_PORT_OBJ_DEL: 493 err = switchdev_handle_port_obj_del(dev, ptr, 494 am65_cpsw_port_dev_check, 495 am65_cpsw_port_obj_del); 496 return notifier_from_errno(err); 497 case SWITCHDEV_PORT_ATTR_SET: 498 err = switchdev_handle_port_attr_set(dev, ptr, 499 am65_cpsw_port_dev_check, 500 am65_cpsw_port_attr_set); 501 return notifier_from_errno(err); 502 default: 503 break; 504 } 505 506 return NOTIFY_DONE; 507 } 508 509 static struct notifier_block cpsw_switchdev_bl_notifier = { 510 .notifier_call = am65_cpsw_switchdev_blocking_event, 511 }; 512 513 int am65_cpsw_switchdev_register_notifiers(struct am65_cpsw_common *cpsw) 514 { 515 int ret = 0; 516 517 ret = register_switchdev_notifier(&cpsw_switchdev_notifier); 518 if (ret) { 519 dev_err(cpsw->dev, "register switchdev notifier fail ret:%d\n", 520 ret); 521 return ret; 522 } 523 524 ret = register_switchdev_blocking_notifier(&cpsw_switchdev_bl_notifier); 525 if (ret) { 526 dev_err(cpsw->dev, "register switchdev blocking notifier ret:%d\n", 527 ret); 528 unregister_switchdev_notifier(&cpsw_switchdev_notifier); 529 } 530 531 return ret; 532 } 533 534 void am65_cpsw_switchdev_unregister_notifiers(struct am65_cpsw_common *cpsw) 535 { 536 unregister_switchdev_blocking_notifier(&cpsw_switchdev_bl_notifier); 537 unregister_switchdev_notifier(&cpsw_switchdev_notifier); 538 } 539