1 // SPDX-License-Identifier: GPL-2.0+ 2 3 #include <linux/module.h> 4 #include <linux/if_bridge.h> 5 #include <linux/if_vlan.h> 6 #include <linux/iopoll.h> 7 #include <linux/ip.h> 8 #include <linux/of_platform.h> 9 #include <linux/of_net.h> 10 #include <linux/packing.h> 11 #include <linux/phy/phy.h> 12 #include <linux/reset.h> 13 #include <net/addrconf.h> 14 15 #include "lan966x_main.h" 16 17 #define XTR_EOF_0 0x00000080U 18 #define XTR_EOF_1 0x01000080U 19 #define XTR_EOF_2 0x02000080U 20 #define XTR_EOF_3 0x03000080U 21 #define XTR_PRUNED 0x04000080U 22 #define XTR_ABORT 0x05000080U 23 #define XTR_ESCAPE 0x06000080U 24 #define XTR_NOT_READY 0x07000080U 25 #define XTR_VALID_BYTES(x) (4 - (((x) >> 24) & 3)) 26 27 #define IO_RANGES 2 28 29 static const struct of_device_id lan966x_match[] = { 30 { .compatible = "microchip,lan966x-switch" }, 31 { } 32 }; 33 MODULE_DEVICE_TABLE(of, lan966x_match); 34 35 struct lan966x_main_io_resource { 36 enum lan966x_target id; 37 phys_addr_t offset; 38 int range; 39 }; 40 41 static const struct lan966x_main_io_resource lan966x_main_iomap[] = { 42 { TARGET_CPU, 0xc0000, 0 }, /* 0xe00c0000 */ 43 { TARGET_FDMA, 0xc0400, 0 }, /* 0xe00c0400 */ 44 { TARGET_ORG, 0, 1 }, /* 0xe2000000 */ 45 { TARGET_GCB, 0x4000, 1 }, /* 0xe2004000 */ 46 { TARGET_QS, 0x8000, 1 }, /* 0xe2008000 */ 47 { TARGET_PTP, 0xc000, 1 }, /* 0xe200c000 */ 48 { TARGET_CHIP_TOP, 0x10000, 1 }, /* 0xe2010000 */ 49 { TARGET_REW, 0x14000, 1 }, /* 0xe2014000 */ 50 { TARGET_SYS, 0x28000, 1 }, /* 0xe2028000 */ 51 { TARGET_DEV, 0x34000, 1 }, /* 0xe2034000 */ 52 { TARGET_DEV + 1, 0x38000, 1 }, /* 0xe2038000 */ 53 { TARGET_DEV + 2, 0x3c000, 1 }, /* 0xe203c000 */ 54 { TARGET_DEV + 3, 0x40000, 1 }, /* 0xe2040000 */ 55 { TARGET_DEV + 4, 0x44000, 1 }, /* 0xe2044000 */ 56 { TARGET_DEV + 5, 0x48000, 1 }, /* 0xe2048000 */ 57 { TARGET_DEV + 6, 0x4c000, 1 }, /* 0xe204c000 */ 58 { TARGET_DEV + 7, 0x50000, 1 }, /* 0xe2050000 */ 59 { TARGET_QSYS, 0x100000, 1 }, /* 0xe2100000 */ 60 { TARGET_AFI, 0x120000, 1 }, /* 0xe2120000 */ 61 { TARGET_ANA, 0x140000, 1 }, /* 0xe2140000 */ 62 }; 63 64 static int lan966x_create_targets(struct platform_device *pdev, 65 struct lan966x *lan966x) 66 { 67 struct resource *iores[IO_RANGES]; 68 void __iomem *begin[IO_RANGES]; 69 int idx; 70 71 /* Initially map the entire range and after that update each target to 72 * point inside the region at the correct offset. It is possible that 73 * other devices access the same region so don't add any checks about 74 * this. 75 */ 76 for (idx = 0; idx < IO_RANGES; idx++) { 77 iores[idx] = platform_get_resource(pdev, IORESOURCE_MEM, 78 idx); 79 if (!iores[idx]) { 80 dev_err(&pdev->dev, "Invalid resource\n"); 81 return -EINVAL; 82 } 83 84 begin[idx] = devm_ioremap(&pdev->dev, 85 iores[idx]->start, 86 resource_size(iores[idx])); 87 if (!begin[idx]) { 88 dev_err(&pdev->dev, "Unable to get registers: %s\n", 89 iores[idx]->name); 90 return -ENOMEM; 91 } 92 } 93 94 for (idx = 0; idx < ARRAY_SIZE(lan966x_main_iomap); idx++) { 95 const struct lan966x_main_io_resource *iomap = 96 &lan966x_main_iomap[idx]; 97 98 lan966x->regs[iomap->id] = begin[iomap->range] + iomap->offset; 99 } 100 101 return 0; 102 } 103 104 static bool lan966x_port_unique_address(struct net_device *dev) 105 { 106 struct lan966x_port *port = netdev_priv(dev); 107 struct lan966x *lan966x = port->lan966x; 108 int p; 109 110 for (p = 0; p < lan966x->num_phys_ports; ++p) { 111 port = lan966x->ports[p]; 112 if (!port || port->dev == dev) 113 continue; 114 115 if (ether_addr_equal(dev->dev_addr, port->dev->dev_addr)) 116 return false; 117 } 118 119 return true; 120 } 121 122 static int lan966x_port_set_mac_address(struct net_device *dev, void *p) 123 { 124 struct lan966x_port *port = netdev_priv(dev); 125 struct lan966x *lan966x = port->lan966x; 126 const struct sockaddr *addr = p; 127 int ret; 128 129 if (ether_addr_equal(addr->sa_data, dev->dev_addr)) 130 return 0; 131 132 /* Learn the new net device MAC address in the mac table. */ 133 ret = lan966x_mac_cpu_learn(lan966x, addr->sa_data, HOST_PVID); 134 if (ret) 135 return ret; 136 137 /* If there is another port with the same address as the dev, then don't 138 * delete it from the MAC table 139 */ 140 if (!lan966x_port_unique_address(dev)) 141 goto out; 142 143 /* Then forget the previous one. */ 144 ret = lan966x_mac_cpu_forget(lan966x, dev->dev_addr, HOST_PVID); 145 if (ret) 146 return ret; 147 148 out: 149 eth_hw_addr_set(dev, addr->sa_data); 150 return ret; 151 } 152 153 static int lan966x_port_get_phys_port_name(struct net_device *dev, 154 char *buf, size_t len) 155 { 156 struct lan966x_port *port = netdev_priv(dev); 157 int ret; 158 159 ret = snprintf(buf, len, "p%d", port->chip_port); 160 if (ret >= len) 161 return -EINVAL; 162 163 return 0; 164 } 165 166 static int lan966x_port_open(struct net_device *dev) 167 { 168 struct lan966x_port *port = netdev_priv(dev); 169 struct lan966x *lan966x = port->lan966x; 170 int err; 171 172 /* Enable receiving frames on the port, and activate auto-learning of 173 * MAC addresses. 174 */ 175 lan_rmw(ANA_PORT_CFG_LEARNAUTO_SET(1) | 176 ANA_PORT_CFG_RECV_ENA_SET(1) | 177 ANA_PORT_CFG_PORTID_VAL_SET(port->chip_port), 178 ANA_PORT_CFG_LEARNAUTO | 179 ANA_PORT_CFG_RECV_ENA | 180 ANA_PORT_CFG_PORTID_VAL, 181 lan966x, ANA_PORT_CFG(port->chip_port)); 182 183 err = phylink_fwnode_phy_connect(port->phylink, port->fwnode, 0); 184 if (err) { 185 netdev_err(dev, "Could not attach to PHY\n"); 186 return err; 187 } 188 189 phylink_start(port->phylink); 190 191 return 0; 192 } 193 194 static int lan966x_port_stop(struct net_device *dev) 195 { 196 struct lan966x_port *port = netdev_priv(dev); 197 198 lan966x_port_config_down(port); 199 phylink_stop(port->phylink); 200 phylink_disconnect_phy(port->phylink); 201 202 return 0; 203 } 204 205 static int lan966x_port_inj_status(struct lan966x *lan966x) 206 { 207 return lan_rd(lan966x, QS_INJ_STATUS); 208 } 209 210 static int lan966x_port_inj_ready(struct lan966x *lan966x, u8 grp) 211 { 212 u32 val; 213 214 if (lan_rd(lan966x, QS_INJ_STATUS) & QS_INJ_STATUS_FIFO_RDY_SET(BIT(grp))) 215 return 0; 216 217 return readx_poll_timeout_atomic(lan966x_port_inj_status, lan966x, val, 218 QS_INJ_STATUS_FIFO_RDY_GET(val) & BIT(grp), 219 READL_SLEEP_US, READL_TIMEOUT_US); 220 } 221 222 static int lan966x_port_ifh_xmit(struct sk_buff *skb, 223 __be32 *ifh, 224 struct net_device *dev) 225 { 226 struct lan966x_port *port = netdev_priv(dev); 227 struct lan966x *lan966x = port->lan966x; 228 u32 i, count, last; 229 u8 grp = 0; 230 u32 val; 231 int err; 232 233 val = lan_rd(lan966x, QS_INJ_STATUS); 234 if (!(QS_INJ_STATUS_FIFO_RDY_GET(val) & BIT(grp)) || 235 (QS_INJ_STATUS_WMARK_REACHED_GET(val) & BIT(grp))) 236 goto err; 237 238 /* Write start of frame */ 239 lan_wr(QS_INJ_CTRL_GAP_SIZE_SET(1) | 240 QS_INJ_CTRL_SOF_SET(1), 241 lan966x, QS_INJ_CTRL(grp)); 242 243 /* Write IFH header */ 244 for (i = 0; i < IFH_LEN; ++i) { 245 /* Wait until the fifo is ready */ 246 err = lan966x_port_inj_ready(lan966x, grp); 247 if (err) 248 goto err; 249 250 lan_wr((__force u32)ifh[i], lan966x, QS_INJ_WR(grp)); 251 } 252 253 /* Write frame */ 254 count = DIV_ROUND_UP(skb->len, 4); 255 last = skb->len % 4; 256 for (i = 0; i < count; ++i) { 257 /* Wait until the fifo is ready */ 258 err = lan966x_port_inj_ready(lan966x, grp); 259 if (err) 260 goto err; 261 262 lan_wr(((u32 *)skb->data)[i], lan966x, QS_INJ_WR(grp)); 263 } 264 265 /* Add padding */ 266 while (i < (LAN966X_BUFFER_MIN_SZ / 4)) { 267 /* Wait until the fifo is ready */ 268 err = lan966x_port_inj_ready(lan966x, grp); 269 if (err) 270 goto err; 271 272 lan_wr(0, lan966x, QS_INJ_WR(grp)); 273 ++i; 274 } 275 276 /* Inidcate EOF and valid bytes in the last word */ 277 lan_wr(QS_INJ_CTRL_GAP_SIZE_SET(1) | 278 QS_INJ_CTRL_VLD_BYTES_SET(skb->len < LAN966X_BUFFER_MIN_SZ ? 279 0 : last) | 280 QS_INJ_CTRL_EOF_SET(1), 281 lan966x, QS_INJ_CTRL(grp)); 282 283 /* Add dummy CRC */ 284 lan_wr(0, lan966x, QS_INJ_WR(grp)); 285 skb_tx_timestamp(skb); 286 287 dev->stats.tx_packets++; 288 dev->stats.tx_bytes += skb->len; 289 290 if (skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP && 291 LAN966X_SKB_CB(skb)->rew_op == IFH_REW_OP_TWO_STEP_PTP) 292 return NETDEV_TX_OK; 293 294 dev_consume_skb_any(skb); 295 return NETDEV_TX_OK; 296 297 err: 298 if (skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP && 299 LAN966X_SKB_CB(skb)->rew_op == IFH_REW_OP_TWO_STEP_PTP) 300 lan966x_ptp_txtstamp_release(port, skb); 301 302 return NETDEV_TX_BUSY; 303 } 304 305 static void lan966x_ifh_set_bypass(void *ifh, u64 bypass) 306 { 307 packing(ifh, &bypass, IFH_POS_BYPASS + IFH_WID_BYPASS - 1, 308 IFH_POS_BYPASS, IFH_LEN * 4, PACK, 0); 309 } 310 311 static void lan966x_ifh_set_port(void *ifh, u64 bypass) 312 { 313 packing(ifh, &bypass, IFH_POS_DSTS + IFH_WID_DSTS - 1, 314 IFH_POS_DSTS, IFH_LEN * 4, PACK, 0); 315 } 316 317 static void lan966x_ifh_set_qos_class(void *ifh, u64 bypass) 318 { 319 packing(ifh, &bypass, IFH_POS_QOS_CLASS + IFH_WID_QOS_CLASS - 1, 320 IFH_POS_QOS_CLASS, IFH_LEN * 4, PACK, 0); 321 } 322 323 static void lan966x_ifh_set_ipv(void *ifh, u64 bypass) 324 { 325 packing(ifh, &bypass, IFH_POS_IPV + IFH_WID_IPV - 1, 326 IFH_POS_IPV, IFH_LEN * 4, PACK, 0); 327 } 328 329 static void lan966x_ifh_set_vid(void *ifh, u64 vid) 330 { 331 packing(ifh, &vid, IFH_POS_TCI + IFH_WID_TCI - 1, 332 IFH_POS_TCI, IFH_LEN * 4, PACK, 0); 333 } 334 335 static void lan966x_ifh_set_rew_op(void *ifh, u64 rew_op) 336 { 337 packing(ifh, &rew_op, IFH_POS_REW_CMD + IFH_WID_REW_CMD - 1, 338 IFH_POS_REW_CMD, IFH_LEN * 4, PACK, 0); 339 } 340 341 static void lan966x_ifh_set_timestamp(void *ifh, u64 timestamp) 342 { 343 packing(ifh, ×tamp, IFH_POS_TIMESTAMP + IFH_WID_TIMESTAMP - 1, 344 IFH_POS_TIMESTAMP, IFH_LEN * 4, PACK, 0); 345 } 346 347 static int lan966x_port_xmit(struct sk_buff *skb, struct net_device *dev) 348 { 349 struct lan966x_port *port = netdev_priv(dev); 350 struct lan966x *lan966x = port->lan966x; 351 __be32 ifh[IFH_LEN]; 352 int err; 353 354 memset(ifh, 0x0, sizeof(__be32) * IFH_LEN); 355 356 lan966x_ifh_set_bypass(ifh, 1); 357 lan966x_ifh_set_port(ifh, BIT_ULL(port->chip_port)); 358 lan966x_ifh_set_qos_class(ifh, skb->priority >= 7 ? 0x7 : skb->priority); 359 lan966x_ifh_set_ipv(ifh, skb->priority >= 7 ? 0x7 : skb->priority); 360 lan966x_ifh_set_vid(ifh, skb_vlan_tag_get(skb)); 361 362 if (port->lan966x->ptp && skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP) { 363 err = lan966x_ptp_txtstamp_request(port, skb); 364 if (err) 365 return err; 366 367 lan966x_ifh_set_rew_op(ifh, LAN966X_SKB_CB(skb)->rew_op); 368 lan966x_ifh_set_timestamp(ifh, LAN966X_SKB_CB(skb)->ts_id); 369 } 370 371 spin_lock(&lan966x->tx_lock); 372 if (port->lan966x->fdma) 373 err = lan966x_fdma_xmit(skb, ifh, dev); 374 else 375 err = lan966x_port_ifh_xmit(skb, ifh, dev); 376 spin_unlock(&lan966x->tx_lock); 377 378 return err; 379 } 380 381 static int lan966x_port_change_mtu(struct net_device *dev, int new_mtu) 382 { 383 struct lan966x_port *port = netdev_priv(dev); 384 struct lan966x *lan966x = port->lan966x; 385 int old_mtu = dev->mtu; 386 int err; 387 388 lan_wr(DEV_MAC_MAXLEN_CFG_MAX_LEN_SET(new_mtu), 389 lan966x, DEV_MAC_MAXLEN_CFG(port->chip_port)); 390 dev->mtu = new_mtu; 391 392 if (!lan966x->fdma) 393 return 0; 394 395 err = lan966x_fdma_change_mtu(lan966x); 396 if (err) { 397 lan_wr(DEV_MAC_MAXLEN_CFG_MAX_LEN_SET(old_mtu), 398 lan966x, DEV_MAC_MAXLEN_CFG(port->chip_port)); 399 dev->mtu = old_mtu; 400 } 401 402 return err; 403 } 404 405 static int lan966x_mc_unsync(struct net_device *dev, const unsigned char *addr) 406 { 407 struct lan966x_port *port = netdev_priv(dev); 408 struct lan966x *lan966x = port->lan966x; 409 410 return lan966x_mac_forget(lan966x, addr, HOST_PVID, ENTRYTYPE_LOCKED); 411 } 412 413 static int lan966x_mc_sync(struct net_device *dev, const unsigned char *addr) 414 { 415 struct lan966x_port *port = netdev_priv(dev); 416 struct lan966x *lan966x = port->lan966x; 417 418 return lan966x_mac_cpu_learn(lan966x, addr, HOST_PVID); 419 } 420 421 static void lan966x_port_set_rx_mode(struct net_device *dev) 422 { 423 __dev_mc_sync(dev, lan966x_mc_sync, lan966x_mc_unsync); 424 } 425 426 static int lan966x_port_get_parent_id(struct net_device *dev, 427 struct netdev_phys_item_id *ppid) 428 { 429 struct lan966x_port *port = netdev_priv(dev); 430 struct lan966x *lan966x = port->lan966x; 431 432 ppid->id_len = sizeof(lan966x->base_mac); 433 memcpy(&ppid->id, &lan966x->base_mac, ppid->id_len); 434 435 return 0; 436 } 437 438 static int lan966x_port_ioctl(struct net_device *dev, struct ifreq *ifr, 439 int cmd) 440 { 441 struct lan966x_port *port = netdev_priv(dev); 442 443 if (!phy_has_hwtstamp(dev->phydev) && port->lan966x->ptp) { 444 switch (cmd) { 445 case SIOCSHWTSTAMP: 446 return lan966x_ptp_hwtstamp_set(port, ifr); 447 case SIOCGHWTSTAMP: 448 return lan966x_ptp_hwtstamp_get(port, ifr); 449 } 450 } 451 452 if (!dev->phydev) 453 return -ENODEV; 454 455 return phy_mii_ioctl(dev->phydev, ifr, cmd); 456 } 457 458 static const struct net_device_ops lan966x_port_netdev_ops = { 459 .ndo_open = lan966x_port_open, 460 .ndo_stop = lan966x_port_stop, 461 .ndo_start_xmit = lan966x_port_xmit, 462 .ndo_change_mtu = lan966x_port_change_mtu, 463 .ndo_set_rx_mode = lan966x_port_set_rx_mode, 464 .ndo_get_phys_port_name = lan966x_port_get_phys_port_name, 465 .ndo_get_stats64 = lan966x_stats_get, 466 .ndo_set_mac_address = lan966x_port_set_mac_address, 467 .ndo_get_port_parent_id = lan966x_port_get_parent_id, 468 .ndo_eth_ioctl = lan966x_port_ioctl, 469 }; 470 471 bool lan966x_netdevice_check(const struct net_device *dev) 472 { 473 return dev->netdev_ops == &lan966x_port_netdev_ops; 474 } 475 476 bool lan966x_hw_offload(struct lan966x *lan966x, u32 port, struct sk_buff *skb) 477 { 478 u32 val; 479 480 /* The IGMP and MLD frames are not forward by the HW if 481 * multicast snooping is enabled, therefor don't mark as 482 * offload to allow the SW to forward the frames accordingly. 483 */ 484 val = lan_rd(lan966x, ANA_CPU_FWD_CFG(port)); 485 if (!(val & (ANA_CPU_FWD_CFG_IGMP_REDIR_ENA | 486 ANA_CPU_FWD_CFG_MLD_REDIR_ENA))) 487 return true; 488 489 if (eth_type_vlan(skb->protocol)) { 490 skb = skb_vlan_untag(skb); 491 if (unlikely(!skb)) 492 return false; 493 } 494 495 if (skb->protocol == htons(ETH_P_IP) && 496 ip_hdr(skb)->protocol == IPPROTO_IGMP) 497 return false; 498 499 if (IS_ENABLED(CONFIG_IPV6) && 500 skb->protocol == htons(ETH_P_IPV6) && 501 ipv6_addr_is_multicast(&ipv6_hdr(skb)->daddr) && 502 !ipv6_mc_check_mld(skb)) 503 return false; 504 505 return true; 506 } 507 508 static int lan966x_port_xtr_status(struct lan966x *lan966x, u8 grp) 509 { 510 return lan_rd(lan966x, QS_XTR_RD(grp)); 511 } 512 513 static int lan966x_port_xtr_ready(struct lan966x *lan966x, u8 grp) 514 { 515 u32 val; 516 517 return read_poll_timeout(lan966x_port_xtr_status, val, 518 val != XTR_NOT_READY, 519 READL_SLEEP_US, READL_TIMEOUT_US, false, 520 lan966x, grp); 521 } 522 523 static int lan966x_rx_frame_word(struct lan966x *lan966x, u8 grp, u32 *rval) 524 { 525 u32 bytes_valid; 526 u32 val; 527 int err; 528 529 val = lan_rd(lan966x, QS_XTR_RD(grp)); 530 if (val == XTR_NOT_READY) { 531 err = lan966x_port_xtr_ready(lan966x, grp); 532 if (err) 533 return -EIO; 534 } 535 536 switch (val) { 537 case XTR_ABORT: 538 return -EIO; 539 case XTR_EOF_0: 540 case XTR_EOF_1: 541 case XTR_EOF_2: 542 case XTR_EOF_3: 543 case XTR_PRUNED: 544 bytes_valid = XTR_VALID_BYTES(val); 545 val = lan_rd(lan966x, QS_XTR_RD(grp)); 546 if (val == XTR_ESCAPE) 547 *rval = lan_rd(lan966x, QS_XTR_RD(grp)); 548 else 549 *rval = val; 550 551 return bytes_valid; 552 case XTR_ESCAPE: 553 *rval = lan_rd(lan966x, QS_XTR_RD(grp)); 554 555 return 4; 556 default: 557 *rval = val; 558 559 return 4; 560 } 561 } 562 563 void lan966x_ifh_get_src_port(void *ifh, u64 *src_port) 564 { 565 packing(ifh, src_port, IFH_POS_SRCPORT + IFH_WID_SRCPORT - 1, 566 IFH_POS_SRCPORT, IFH_LEN * 4, UNPACK, 0); 567 } 568 569 static void lan966x_ifh_get_len(void *ifh, u64 *len) 570 { 571 packing(ifh, len, IFH_POS_LEN + IFH_WID_LEN - 1, 572 IFH_POS_LEN, IFH_LEN * 4, UNPACK, 0); 573 } 574 575 void lan966x_ifh_get_timestamp(void *ifh, u64 *timestamp) 576 { 577 packing(ifh, timestamp, IFH_POS_TIMESTAMP + IFH_WID_TIMESTAMP - 1, 578 IFH_POS_TIMESTAMP, IFH_LEN * 4, UNPACK, 0); 579 } 580 581 static irqreturn_t lan966x_xtr_irq_handler(int irq, void *args) 582 { 583 struct lan966x *lan966x = args; 584 int i, grp = 0, err = 0; 585 586 if (!(lan_rd(lan966x, QS_XTR_DATA_PRESENT) & BIT(grp))) 587 return IRQ_NONE; 588 589 do { 590 u64 src_port, len, timestamp; 591 struct net_device *dev; 592 struct sk_buff *skb; 593 int sz = 0, buf_len; 594 u32 ifh[IFH_LEN]; 595 u32 *buf; 596 u32 val; 597 598 for (i = 0; i < IFH_LEN; i++) { 599 err = lan966x_rx_frame_word(lan966x, grp, &ifh[i]); 600 if (err != 4) 601 goto recover; 602 } 603 604 err = 0; 605 606 lan966x_ifh_get_src_port(ifh, &src_port); 607 lan966x_ifh_get_len(ifh, &len); 608 lan966x_ifh_get_timestamp(ifh, ×tamp); 609 610 WARN_ON(src_port >= lan966x->num_phys_ports); 611 612 dev = lan966x->ports[src_port]->dev; 613 skb = netdev_alloc_skb(dev, len); 614 if (unlikely(!skb)) { 615 netdev_err(dev, "Unable to allocate sk_buff\n"); 616 err = -ENOMEM; 617 break; 618 } 619 buf_len = len - ETH_FCS_LEN; 620 buf = (u32 *)skb_put(skb, buf_len); 621 622 len = 0; 623 do { 624 sz = lan966x_rx_frame_word(lan966x, grp, &val); 625 if (sz < 0) { 626 kfree_skb(skb); 627 goto recover; 628 } 629 630 *buf++ = val; 631 len += sz; 632 } while (len < buf_len); 633 634 /* Read the FCS */ 635 sz = lan966x_rx_frame_word(lan966x, grp, &val); 636 if (sz < 0) { 637 kfree_skb(skb); 638 goto recover; 639 } 640 641 /* Update the statistics if part of the FCS was read before */ 642 len -= ETH_FCS_LEN - sz; 643 644 if (unlikely(dev->features & NETIF_F_RXFCS)) { 645 buf = (u32 *)skb_put(skb, ETH_FCS_LEN); 646 *buf = val; 647 } 648 649 lan966x_ptp_rxtstamp(lan966x, skb, timestamp); 650 skb->protocol = eth_type_trans(skb, dev); 651 652 if (lan966x->bridge_mask & BIT(src_port)) { 653 skb->offload_fwd_mark = 1; 654 655 skb_reset_network_header(skb); 656 if (!lan966x_hw_offload(lan966x, src_port, skb)) 657 skb->offload_fwd_mark = 0; 658 } 659 660 if (!skb_defer_rx_timestamp(skb)) 661 netif_rx(skb); 662 663 dev->stats.rx_bytes += len; 664 dev->stats.rx_packets++; 665 666 recover: 667 if (sz < 0 || err) 668 lan_rd(lan966x, QS_XTR_RD(grp)); 669 670 } while (lan_rd(lan966x, QS_XTR_DATA_PRESENT) & BIT(grp)); 671 672 return IRQ_HANDLED; 673 } 674 675 static irqreturn_t lan966x_ana_irq_handler(int irq, void *args) 676 { 677 struct lan966x *lan966x = args; 678 679 return lan966x_mac_irq_handler(lan966x); 680 } 681 682 static void lan966x_cleanup_ports(struct lan966x *lan966x) 683 { 684 struct lan966x_port *port; 685 int p; 686 687 for (p = 0; p < lan966x->num_phys_ports; p++) { 688 port = lan966x->ports[p]; 689 if (!port) 690 continue; 691 692 if (port->dev) 693 unregister_netdev(port->dev); 694 695 if (lan966x->fdma && lan966x->fdma_ndev == port->dev) 696 lan966x_fdma_netdev_deinit(lan966x, port->dev); 697 698 if (port->phylink) { 699 rtnl_lock(); 700 lan966x_port_stop(port->dev); 701 rtnl_unlock(); 702 phylink_destroy(port->phylink); 703 port->phylink = NULL; 704 } 705 706 if (port->fwnode) 707 fwnode_handle_put(port->fwnode); 708 } 709 710 disable_irq(lan966x->xtr_irq); 711 lan966x->xtr_irq = -ENXIO; 712 713 if (lan966x->ana_irq > 0) { 714 disable_irq(lan966x->ana_irq); 715 lan966x->ana_irq = -ENXIO; 716 } 717 718 if (lan966x->fdma) 719 devm_free_irq(lan966x->dev, lan966x->fdma_irq, lan966x); 720 721 if (lan966x->ptp_irq > 0) 722 devm_free_irq(lan966x->dev, lan966x->ptp_irq, lan966x); 723 724 if (lan966x->ptp_ext_irq > 0) 725 devm_free_irq(lan966x->dev, lan966x->ptp_ext_irq, lan966x); 726 } 727 728 static int lan966x_probe_port(struct lan966x *lan966x, u32 p, 729 phy_interface_t phy_mode, 730 struct fwnode_handle *portnp) 731 { 732 struct lan966x_port *port; 733 struct phylink *phylink; 734 struct net_device *dev; 735 int err; 736 737 if (p >= lan966x->num_phys_ports) 738 return -EINVAL; 739 740 dev = devm_alloc_etherdev_mqs(lan966x->dev, 741 sizeof(struct lan966x_port), 8, 1); 742 if (!dev) 743 return -ENOMEM; 744 745 SET_NETDEV_DEV(dev, lan966x->dev); 746 port = netdev_priv(dev); 747 port->dev = dev; 748 port->lan966x = lan966x; 749 port->chip_port = p; 750 lan966x->ports[p] = port; 751 752 dev->max_mtu = ETH_MAX_MTU; 753 754 dev->netdev_ops = &lan966x_port_netdev_ops; 755 dev->ethtool_ops = &lan966x_ethtool_ops; 756 dev->features |= NETIF_F_HW_VLAN_CTAG_TX | 757 NETIF_F_HW_VLAN_STAG_TX; 758 dev->needed_headroom = IFH_LEN * sizeof(u32); 759 760 eth_hw_addr_gen(dev, lan966x->base_mac, p + 1); 761 762 lan966x_mac_learn(lan966x, PGID_CPU, dev->dev_addr, HOST_PVID, 763 ENTRYTYPE_LOCKED); 764 765 port->phylink_config.dev = &port->dev->dev; 766 port->phylink_config.type = PHYLINK_NETDEV; 767 port->phylink_pcs.poll = true; 768 port->phylink_pcs.ops = &lan966x_phylink_pcs_ops; 769 770 port->phylink_config.mac_capabilities = MAC_ASYM_PAUSE | MAC_SYM_PAUSE | 771 MAC_10 | MAC_100 | MAC_1000FD | MAC_2500FD; 772 773 phy_interface_set_rgmii(port->phylink_config.supported_interfaces); 774 __set_bit(PHY_INTERFACE_MODE_MII, 775 port->phylink_config.supported_interfaces); 776 __set_bit(PHY_INTERFACE_MODE_GMII, 777 port->phylink_config.supported_interfaces); 778 __set_bit(PHY_INTERFACE_MODE_SGMII, 779 port->phylink_config.supported_interfaces); 780 __set_bit(PHY_INTERFACE_MODE_QSGMII, 781 port->phylink_config.supported_interfaces); 782 __set_bit(PHY_INTERFACE_MODE_QUSGMII, 783 port->phylink_config.supported_interfaces); 784 __set_bit(PHY_INTERFACE_MODE_1000BASEX, 785 port->phylink_config.supported_interfaces); 786 __set_bit(PHY_INTERFACE_MODE_2500BASEX, 787 port->phylink_config.supported_interfaces); 788 789 phylink = phylink_create(&port->phylink_config, 790 portnp, 791 phy_mode, 792 &lan966x_phylink_mac_ops); 793 if (IS_ERR(phylink)) { 794 port->dev = NULL; 795 return PTR_ERR(phylink); 796 } 797 798 port->phylink = phylink; 799 800 err = register_netdev(dev); 801 if (err) { 802 dev_err(lan966x->dev, "register_netdev failed\n"); 803 return err; 804 } 805 806 lan966x_vlan_port_set_vlan_aware(port, 0); 807 lan966x_vlan_port_set_vid(port, HOST_PVID, false, false); 808 lan966x_vlan_port_apply(port); 809 810 return 0; 811 } 812 813 static void lan966x_init(struct lan966x *lan966x) 814 { 815 u32 p, i; 816 817 /* MAC table initialization */ 818 lan966x_mac_init(lan966x); 819 820 lan966x_vlan_init(lan966x); 821 822 /* Flush queues */ 823 lan_wr(lan_rd(lan966x, QS_XTR_FLUSH) | 824 GENMASK(1, 0), 825 lan966x, QS_XTR_FLUSH); 826 827 /* Allow to drain */ 828 mdelay(1); 829 830 /* All Queues normal */ 831 lan_wr(lan_rd(lan966x, QS_XTR_FLUSH) & 832 ~(GENMASK(1, 0)), 833 lan966x, QS_XTR_FLUSH); 834 835 /* Set MAC age time to default value, the entry is aged after 836 * 2 * AGE_PERIOD 837 */ 838 lan_wr(ANA_AUTOAGE_AGE_PERIOD_SET(BR_DEFAULT_AGEING_TIME / 2 / HZ), 839 lan966x, ANA_AUTOAGE); 840 841 /* Disable learning for frames discarded by VLAN ingress filtering */ 842 lan_rmw(ANA_ADVLEARN_VLAN_CHK_SET(1), 843 ANA_ADVLEARN_VLAN_CHK, 844 lan966x, ANA_ADVLEARN); 845 846 /* Setup frame ageing - "2 sec" - The unit is 6.5 us on lan966x */ 847 lan_wr(SYS_FRM_AGING_AGE_TX_ENA_SET(1) | 848 (20000000 / 65), 849 lan966x, SYS_FRM_AGING); 850 851 /* Map the 8 CPU extraction queues to CPU port */ 852 lan_wr(0, lan966x, QSYS_CPU_GROUP_MAP); 853 854 /* Do byte-swap and expect status after last data word 855 * Extraction: Mode: manual extraction) | Byte_swap 856 */ 857 lan_wr(QS_XTR_GRP_CFG_MODE_SET(lan966x->fdma ? 2 : 1) | 858 QS_XTR_GRP_CFG_BYTE_SWAP_SET(1), 859 lan966x, QS_XTR_GRP_CFG(0)); 860 861 /* Injection: Mode: manual injection | Byte_swap */ 862 lan_wr(QS_INJ_GRP_CFG_MODE_SET(lan966x->fdma ? 2 : 1) | 863 QS_INJ_GRP_CFG_BYTE_SWAP_SET(1), 864 lan966x, QS_INJ_GRP_CFG(0)); 865 866 lan_rmw(QS_INJ_CTRL_GAP_SIZE_SET(0), 867 QS_INJ_CTRL_GAP_SIZE, 868 lan966x, QS_INJ_CTRL(0)); 869 870 /* Enable IFH insertion/parsing on CPU ports */ 871 lan_wr(SYS_PORT_MODE_INCL_INJ_HDR_SET(1) | 872 SYS_PORT_MODE_INCL_XTR_HDR_SET(1), 873 lan966x, SYS_PORT_MODE(CPU_PORT)); 874 875 /* Setup flooding PGIDs */ 876 lan_wr(ANA_FLOODING_IPMC_FLD_MC4_DATA_SET(PGID_MCIPV4) | 877 ANA_FLOODING_IPMC_FLD_MC4_CTRL_SET(PGID_MC) | 878 ANA_FLOODING_IPMC_FLD_MC6_DATA_SET(PGID_MCIPV6) | 879 ANA_FLOODING_IPMC_FLD_MC6_CTRL_SET(PGID_MC), 880 lan966x, ANA_FLOODING_IPMC); 881 882 /* There are 8 priorities */ 883 for (i = 0; i < 8; ++i) 884 lan_rmw(ANA_FLOODING_FLD_MULTICAST_SET(PGID_MC) | 885 ANA_FLOODING_FLD_UNICAST_SET(PGID_UC) | 886 ANA_FLOODING_FLD_BROADCAST_SET(PGID_BC), 887 ANA_FLOODING_FLD_MULTICAST | 888 ANA_FLOODING_FLD_UNICAST | 889 ANA_FLOODING_FLD_BROADCAST, 890 lan966x, ANA_FLOODING(i)); 891 892 for (i = 0; i < PGID_ENTRIES; ++i) 893 /* Set all the entries to obey VLAN_VLAN */ 894 lan_rmw(ANA_PGID_CFG_OBEY_VLAN_SET(1), 895 ANA_PGID_CFG_OBEY_VLAN, 896 lan966x, ANA_PGID_CFG(i)); 897 898 for (p = 0; p < lan966x->num_phys_ports; p++) { 899 /* Disable bridging by default */ 900 lan_rmw(ANA_PGID_PGID_SET(0x0), 901 ANA_PGID_PGID, 902 lan966x, ANA_PGID(p + PGID_SRC)); 903 904 /* Do not forward BPDU frames to the front ports and copy them 905 * to CPU 906 */ 907 lan_wr(0xffff, lan966x, ANA_CPU_FWD_BPDU_CFG(p)); 908 } 909 910 /* Set source buffer size for each priority and each port to 1500 bytes */ 911 for (i = 0; i <= QSYS_Q_RSRV; ++i) { 912 lan_wr(1500 / 64, lan966x, QSYS_RES_CFG(i)); 913 lan_wr(1500 / 64, lan966x, QSYS_RES_CFG(512 + i)); 914 } 915 916 /* Enable switching to/from cpu port */ 917 lan_wr(QSYS_SW_PORT_MODE_PORT_ENA_SET(1) | 918 QSYS_SW_PORT_MODE_SCH_NEXT_CFG_SET(1) | 919 QSYS_SW_PORT_MODE_INGRESS_DROP_MODE_SET(1), 920 lan966x, QSYS_SW_PORT_MODE(CPU_PORT)); 921 922 /* Configure and enable the CPU port */ 923 lan_rmw(ANA_PGID_PGID_SET(0), 924 ANA_PGID_PGID, 925 lan966x, ANA_PGID(CPU_PORT)); 926 lan_rmw(ANA_PGID_PGID_SET(BIT(CPU_PORT)), 927 ANA_PGID_PGID, 928 lan966x, ANA_PGID(PGID_CPU)); 929 930 /* Multicast to all other ports */ 931 lan_rmw(GENMASK(lan966x->num_phys_ports - 1, 0), 932 ANA_PGID_PGID, 933 lan966x, ANA_PGID(PGID_MC)); 934 935 /* This will be controlled by mrouter ports */ 936 lan_rmw(GENMASK(lan966x->num_phys_ports - 1, 0), 937 ANA_PGID_PGID, 938 lan966x, ANA_PGID(PGID_MCIPV4)); 939 940 lan_rmw(GENMASK(lan966x->num_phys_ports - 1, 0), 941 ANA_PGID_PGID, 942 lan966x, ANA_PGID(PGID_MCIPV6)); 943 944 /* Unicast to all other ports */ 945 lan_rmw(GENMASK(lan966x->num_phys_ports - 1, 0), 946 ANA_PGID_PGID, 947 lan966x, ANA_PGID(PGID_UC)); 948 949 /* Broadcast to the CPU port and to other ports */ 950 lan_rmw(ANA_PGID_PGID_SET(BIT(CPU_PORT) | GENMASK(lan966x->num_phys_ports - 1, 0)), 951 ANA_PGID_PGID, 952 lan966x, ANA_PGID(PGID_BC)); 953 954 lan_wr(REW_PORT_CFG_NO_REWRITE_SET(1), 955 lan966x, REW_PORT_CFG(CPU_PORT)); 956 957 lan_rmw(ANA_ANAINTR_INTR_ENA_SET(1), 958 ANA_ANAINTR_INTR_ENA, 959 lan966x, ANA_ANAINTR); 960 961 spin_lock_init(&lan966x->tx_lock); 962 } 963 964 static int lan966x_ram_init(struct lan966x *lan966x) 965 { 966 return lan_rd(lan966x, SYS_RAM_INIT); 967 } 968 969 static int lan966x_reset_switch(struct lan966x *lan966x) 970 { 971 struct reset_control *switch_reset; 972 int val = 0; 973 int ret; 974 975 switch_reset = devm_reset_control_get_optional_shared(lan966x->dev, 976 "switch"); 977 if (IS_ERR(switch_reset)) 978 return dev_err_probe(lan966x->dev, PTR_ERR(switch_reset), 979 "Could not obtain switch reset"); 980 981 reset_control_reset(switch_reset); 982 983 lan_wr(SYS_RESET_CFG_CORE_ENA_SET(0), lan966x, SYS_RESET_CFG); 984 lan_wr(SYS_RAM_INIT_RAM_INIT_SET(1), lan966x, SYS_RAM_INIT); 985 ret = readx_poll_timeout(lan966x_ram_init, lan966x, 986 val, (val & BIT(1)) == 0, READL_SLEEP_US, 987 READL_TIMEOUT_US); 988 if (ret) 989 return ret; 990 991 lan_wr(SYS_RESET_CFG_CORE_ENA_SET(1), lan966x, SYS_RESET_CFG); 992 993 return 0; 994 } 995 996 static int lan966x_probe(struct platform_device *pdev) 997 { 998 struct fwnode_handle *ports, *portnp; 999 struct lan966x *lan966x; 1000 u8 mac_addr[ETH_ALEN]; 1001 int err; 1002 1003 lan966x = devm_kzalloc(&pdev->dev, sizeof(*lan966x), GFP_KERNEL); 1004 if (!lan966x) 1005 return -ENOMEM; 1006 1007 platform_set_drvdata(pdev, lan966x); 1008 lan966x->dev = &pdev->dev; 1009 1010 if (!device_get_mac_address(&pdev->dev, mac_addr)) { 1011 ether_addr_copy(lan966x->base_mac, mac_addr); 1012 } else { 1013 pr_info("MAC addr was not set, use random MAC\n"); 1014 eth_random_addr(lan966x->base_mac); 1015 lan966x->base_mac[5] &= 0xf0; 1016 } 1017 1018 ports = device_get_named_child_node(&pdev->dev, "ethernet-ports"); 1019 if (!ports) 1020 return dev_err_probe(&pdev->dev, -ENODEV, 1021 "no ethernet-ports child found\n"); 1022 1023 err = lan966x_create_targets(pdev, lan966x); 1024 if (err) 1025 return dev_err_probe(&pdev->dev, err, 1026 "Failed to create targets"); 1027 1028 err = lan966x_reset_switch(lan966x); 1029 if (err) 1030 return dev_err_probe(&pdev->dev, err, "Reset failed"); 1031 1032 lan966x->num_phys_ports = NUM_PHYS_PORTS; 1033 lan966x->ports = devm_kcalloc(&pdev->dev, lan966x->num_phys_ports, 1034 sizeof(struct lan966x_port *), 1035 GFP_KERNEL); 1036 if (!lan966x->ports) 1037 return -ENOMEM; 1038 1039 /* There QS system has 32KB of memory */ 1040 lan966x->shared_queue_sz = LAN966X_BUFFER_MEMORY; 1041 1042 /* set irq */ 1043 lan966x->xtr_irq = platform_get_irq_byname(pdev, "xtr"); 1044 if (lan966x->xtr_irq <= 0) 1045 return -EINVAL; 1046 1047 err = devm_request_threaded_irq(&pdev->dev, lan966x->xtr_irq, NULL, 1048 lan966x_xtr_irq_handler, IRQF_ONESHOT, 1049 "frame extraction", lan966x); 1050 if (err) { 1051 pr_err("Unable to use xtr irq"); 1052 return -ENODEV; 1053 } 1054 1055 lan966x->ana_irq = platform_get_irq_byname(pdev, "ana"); 1056 if (lan966x->ana_irq > 0) { 1057 err = devm_request_threaded_irq(&pdev->dev, lan966x->ana_irq, NULL, 1058 lan966x_ana_irq_handler, IRQF_ONESHOT, 1059 "ana irq", lan966x); 1060 if (err) 1061 return dev_err_probe(&pdev->dev, err, "Unable to use ana irq"); 1062 } 1063 1064 lan966x->ptp_irq = platform_get_irq_byname(pdev, "ptp"); 1065 if (lan966x->ptp_irq > 0) { 1066 err = devm_request_threaded_irq(&pdev->dev, lan966x->ptp_irq, NULL, 1067 lan966x_ptp_irq_handler, IRQF_ONESHOT, 1068 "ptp irq", lan966x); 1069 if (err) 1070 return dev_err_probe(&pdev->dev, err, "Unable to use ptp irq"); 1071 1072 lan966x->ptp = 1; 1073 } 1074 1075 lan966x->fdma_irq = platform_get_irq_byname(pdev, "fdma"); 1076 if (lan966x->fdma_irq > 0) { 1077 err = devm_request_irq(&pdev->dev, lan966x->fdma_irq, 1078 lan966x_fdma_irq_handler, 0, 1079 "fdma irq", lan966x); 1080 if (err) 1081 return dev_err_probe(&pdev->dev, err, "Unable to use fdma irq"); 1082 1083 lan966x->fdma = true; 1084 } 1085 1086 if (lan966x->ptp) { 1087 lan966x->ptp_ext_irq = platform_get_irq_byname(pdev, "ptp-ext"); 1088 if (lan966x->ptp_ext_irq > 0) { 1089 err = devm_request_threaded_irq(&pdev->dev, 1090 lan966x->ptp_ext_irq, NULL, 1091 lan966x_ptp_ext_irq_handler, 1092 IRQF_ONESHOT, 1093 "ptp-ext irq", lan966x); 1094 if (err) 1095 return dev_err_probe(&pdev->dev, err, 1096 "Unable to use ptp-ext irq"); 1097 } 1098 } 1099 1100 /* init switch */ 1101 lan966x_init(lan966x); 1102 lan966x_stats_init(lan966x); 1103 1104 /* go over the child nodes */ 1105 fwnode_for_each_available_child_node(ports, portnp) { 1106 phy_interface_t phy_mode; 1107 struct phy *serdes; 1108 u32 p; 1109 1110 if (fwnode_property_read_u32(portnp, "reg", &p)) 1111 continue; 1112 1113 phy_mode = fwnode_get_phy_mode(portnp); 1114 err = lan966x_probe_port(lan966x, p, phy_mode, portnp); 1115 if (err) 1116 goto cleanup_ports; 1117 1118 /* Read needed configuration */ 1119 lan966x->ports[p]->config.portmode = phy_mode; 1120 lan966x->ports[p]->fwnode = fwnode_handle_get(portnp); 1121 1122 serdes = devm_of_phy_get(lan966x->dev, to_of_node(portnp), NULL); 1123 if (PTR_ERR(serdes) == -ENODEV) 1124 serdes = NULL; 1125 if (IS_ERR(serdes)) { 1126 err = PTR_ERR(serdes); 1127 goto cleanup_ports; 1128 } 1129 lan966x->ports[p]->serdes = serdes; 1130 1131 lan966x_port_init(lan966x->ports[p]); 1132 } 1133 1134 lan966x_mdb_init(lan966x); 1135 err = lan966x_fdb_init(lan966x); 1136 if (err) 1137 goto cleanup_ports; 1138 1139 err = lan966x_ptp_init(lan966x); 1140 if (err) 1141 goto cleanup_fdb; 1142 1143 err = lan966x_fdma_init(lan966x); 1144 if (err) 1145 goto cleanup_ptp; 1146 1147 return 0; 1148 1149 cleanup_ptp: 1150 lan966x_ptp_deinit(lan966x); 1151 1152 cleanup_fdb: 1153 lan966x_fdb_deinit(lan966x); 1154 1155 cleanup_ports: 1156 fwnode_handle_put(portnp); 1157 1158 lan966x_cleanup_ports(lan966x); 1159 1160 cancel_delayed_work_sync(&lan966x->stats_work); 1161 destroy_workqueue(lan966x->stats_queue); 1162 mutex_destroy(&lan966x->stats_lock); 1163 1164 return err; 1165 } 1166 1167 static int lan966x_remove(struct platform_device *pdev) 1168 { 1169 struct lan966x *lan966x = platform_get_drvdata(pdev); 1170 1171 lan966x_fdma_deinit(lan966x); 1172 lan966x_cleanup_ports(lan966x); 1173 1174 cancel_delayed_work_sync(&lan966x->stats_work); 1175 destroy_workqueue(lan966x->stats_queue); 1176 mutex_destroy(&lan966x->stats_lock); 1177 1178 lan966x_mac_purge_entries(lan966x); 1179 lan966x_mdb_deinit(lan966x); 1180 lan966x_fdb_deinit(lan966x); 1181 lan966x_ptp_deinit(lan966x); 1182 1183 return 0; 1184 } 1185 1186 static struct platform_driver lan966x_driver = { 1187 .probe = lan966x_probe, 1188 .remove = lan966x_remove, 1189 .driver = { 1190 .name = "lan966x-switch", 1191 .of_match_table = lan966x_match, 1192 }, 1193 }; 1194 1195 static int __init lan966x_switch_driver_init(void) 1196 { 1197 int ret; 1198 1199 lan966x_register_notifier_blocks(); 1200 1201 ret = platform_driver_register(&lan966x_driver); 1202 if (ret) 1203 goto err; 1204 1205 return 0; 1206 1207 err: 1208 lan966x_unregister_notifier_blocks(); 1209 return ret; 1210 } 1211 1212 static void __exit lan966x_switch_driver_exit(void) 1213 { 1214 platform_driver_unregister(&lan966x_driver); 1215 lan966x_unregister_notifier_blocks(); 1216 } 1217 1218 module_init(lan966x_switch_driver_init); 1219 module_exit(lan966x_switch_driver_exit); 1220 1221 MODULE_DESCRIPTION("Microchip LAN966X switch driver"); 1222 MODULE_AUTHOR("Horatiu Vultur <horatiu.vultur@microchip.com>"); 1223 MODULE_LICENSE("Dual MIT/GPL"); 1224