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 .ndo_setup_tc = lan966x_tc_setup, 470 }; 471 472 bool lan966x_netdevice_check(const struct net_device *dev) 473 { 474 return dev->netdev_ops == &lan966x_port_netdev_ops; 475 } 476 477 bool lan966x_hw_offload(struct lan966x *lan966x, u32 port, struct sk_buff *skb) 478 { 479 u32 val; 480 481 /* The IGMP and MLD frames are not forward by the HW if 482 * multicast snooping is enabled, therefor don't mark as 483 * offload to allow the SW to forward the frames accordingly. 484 */ 485 val = lan_rd(lan966x, ANA_CPU_FWD_CFG(port)); 486 if (!(val & (ANA_CPU_FWD_CFG_IGMP_REDIR_ENA | 487 ANA_CPU_FWD_CFG_MLD_REDIR_ENA))) 488 return true; 489 490 if (eth_type_vlan(skb->protocol)) { 491 skb = skb_vlan_untag(skb); 492 if (unlikely(!skb)) 493 return false; 494 } 495 496 if (skb->protocol == htons(ETH_P_IP) && 497 ip_hdr(skb)->protocol == IPPROTO_IGMP) 498 return false; 499 500 if (IS_ENABLED(CONFIG_IPV6) && 501 skb->protocol == htons(ETH_P_IPV6) && 502 ipv6_addr_is_multicast(&ipv6_hdr(skb)->daddr) && 503 !ipv6_mc_check_mld(skb)) 504 return false; 505 506 return true; 507 } 508 509 static int lan966x_port_xtr_status(struct lan966x *lan966x, u8 grp) 510 { 511 return lan_rd(lan966x, QS_XTR_RD(grp)); 512 } 513 514 static int lan966x_port_xtr_ready(struct lan966x *lan966x, u8 grp) 515 { 516 u32 val; 517 518 return read_poll_timeout(lan966x_port_xtr_status, val, 519 val != XTR_NOT_READY, 520 READL_SLEEP_US, READL_TIMEOUT_US, false, 521 lan966x, grp); 522 } 523 524 static int lan966x_rx_frame_word(struct lan966x *lan966x, u8 grp, u32 *rval) 525 { 526 u32 bytes_valid; 527 u32 val; 528 int err; 529 530 val = lan_rd(lan966x, QS_XTR_RD(grp)); 531 if (val == XTR_NOT_READY) { 532 err = lan966x_port_xtr_ready(lan966x, grp); 533 if (err) 534 return -EIO; 535 } 536 537 switch (val) { 538 case XTR_ABORT: 539 return -EIO; 540 case XTR_EOF_0: 541 case XTR_EOF_1: 542 case XTR_EOF_2: 543 case XTR_EOF_3: 544 case XTR_PRUNED: 545 bytes_valid = XTR_VALID_BYTES(val); 546 val = lan_rd(lan966x, QS_XTR_RD(grp)); 547 if (val == XTR_ESCAPE) 548 *rval = lan_rd(lan966x, QS_XTR_RD(grp)); 549 else 550 *rval = val; 551 552 return bytes_valid; 553 case XTR_ESCAPE: 554 *rval = lan_rd(lan966x, QS_XTR_RD(grp)); 555 556 return 4; 557 default: 558 *rval = val; 559 560 return 4; 561 } 562 } 563 564 void lan966x_ifh_get_src_port(void *ifh, u64 *src_port) 565 { 566 packing(ifh, src_port, IFH_POS_SRCPORT + IFH_WID_SRCPORT - 1, 567 IFH_POS_SRCPORT, IFH_LEN * 4, UNPACK, 0); 568 } 569 570 static void lan966x_ifh_get_len(void *ifh, u64 *len) 571 { 572 packing(ifh, len, IFH_POS_LEN + IFH_WID_LEN - 1, 573 IFH_POS_LEN, IFH_LEN * 4, UNPACK, 0); 574 } 575 576 void lan966x_ifh_get_timestamp(void *ifh, u64 *timestamp) 577 { 578 packing(ifh, timestamp, IFH_POS_TIMESTAMP + IFH_WID_TIMESTAMP - 1, 579 IFH_POS_TIMESTAMP, IFH_LEN * 4, UNPACK, 0); 580 } 581 582 static irqreturn_t lan966x_xtr_irq_handler(int irq, void *args) 583 { 584 struct lan966x *lan966x = args; 585 int i, grp = 0, err = 0; 586 587 if (!(lan_rd(lan966x, QS_XTR_DATA_PRESENT) & BIT(grp))) 588 return IRQ_NONE; 589 590 do { 591 u64 src_port, len, timestamp; 592 struct net_device *dev; 593 struct sk_buff *skb; 594 int sz = 0, buf_len; 595 u32 ifh[IFH_LEN]; 596 u32 *buf; 597 u32 val; 598 599 for (i = 0; i < IFH_LEN; i++) { 600 err = lan966x_rx_frame_word(lan966x, grp, &ifh[i]); 601 if (err != 4) 602 goto recover; 603 } 604 605 err = 0; 606 607 lan966x_ifh_get_src_port(ifh, &src_port); 608 lan966x_ifh_get_len(ifh, &len); 609 lan966x_ifh_get_timestamp(ifh, ×tamp); 610 611 WARN_ON(src_port >= lan966x->num_phys_ports); 612 613 dev = lan966x->ports[src_port]->dev; 614 skb = netdev_alloc_skb(dev, len); 615 if (unlikely(!skb)) { 616 netdev_err(dev, "Unable to allocate sk_buff\n"); 617 err = -ENOMEM; 618 break; 619 } 620 buf_len = len - ETH_FCS_LEN; 621 buf = (u32 *)skb_put(skb, buf_len); 622 623 len = 0; 624 do { 625 sz = lan966x_rx_frame_word(lan966x, grp, &val); 626 if (sz < 0) { 627 kfree_skb(skb); 628 goto recover; 629 } 630 631 *buf++ = val; 632 len += sz; 633 } while (len < buf_len); 634 635 /* Read the FCS */ 636 sz = lan966x_rx_frame_word(lan966x, grp, &val); 637 if (sz < 0) { 638 kfree_skb(skb); 639 goto recover; 640 } 641 642 /* Update the statistics if part of the FCS was read before */ 643 len -= ETH_FCS_LEN - sz; 644 645 if (unlikely(dev->features & NETIF_F_RXFCS)) { 646 buf = (u32 *)skb_put(skb, ETH_FCS_LEN); 647 *buf = val; 648 } 649 650 lan966x_ptp_rxtstamp(lan966x, skb, timestamp); 651 skb->protocol = eth_type_trans(skb, dev); 652 653 if (lan966x->bridge_mask & BIT(src_port)) { 654 skb->offload_fwd_mark = 1; 655 656 skb_reset_network_header(skb); 657 if (!lan966x_hw_offload(lan966x, src_port, skb)) 658 skb->offload_fwd_mark = 0; 659 } 660 661 if (!skb_defer_rx_timestamp(skb)) 662 netif_rx(skb); 663 664 dev->stats.rx_bytes += len; 665 dev->stats.rx_packets++; 666 667 recover: 668 if (sz < 0 || err) 669 lan_rd(lan966x, QS_XTR_RD(grp)); 670 671 } while (lan_rd(lan966x, QS_XTR_DATA_PRESENT) & BIT(grp)); 672 673 return IRQ_HANDLED; 674 } 675 676 static irqreturn_t lan966x_ana_irq_handler(int irq, void *args) 677 { 678 struct lan966x *lan966x = args; 679 680 return lan966x_mac_irq_handler(lan966x); 681 } 682 683 static void lan966x_cleanup_ports(struct lan966x *lan966x) 684 { 685 struct lan966x_port *port; 686 int p; 687 688 for (p = 0; p < lan966x->num_phys_ports; p++) { 689 port = lan966x->ports[p]; 690 if (!port) 691 continue; 692 693 if (port->dev) 694 unregister_netdev(port->dev); 695 696 if (lan966x->fdma && lan966x->fdma_ndev == port->dev) 697 lan966x_fdma_netdev_deinit(lan966x, port->dev); 698 699 if (port->phylink) { 700 rtnl_lock(); 701 lan966x_port_stop(port->dev); 702 rtnl_unlock(); 703 phylink_destroy(port->phylink); 704 port->phylink = NULL; 705 } 706 707 if (port->fwnode) 708 fwnode_handle_put(port->fwnode); 709 } 710 711 disable_irq(lan966x->xtr_irq); 712 lan966x->xtr_irq = -ENXIO; 713 714 if (lan966x->ana_irq > 0) { 715 disable_irq(lan966x->ana_irq); 716 lan966x->ana_irq = -ENXIO; 717 } 718 719 if (lan966x->fdma) 720 devm_free_irq(lan966x->dev, lan966x->fdma_irq, lan966x); 721 722 if (lan966x->ptp_irq > 0) 723 devm_free_irq(lan966x->dev, lan966x->ptp_irq, lan966x); 724 725 if (lan966x->ptp_ext_irq > 0) 726 devm_free_irq(lan966x->dev, lan966x->ptp_ext_irq, lan966x); 727 } 728 729 static int lan966x_probe_port(struct lan966x *lan966x, u32 p, 730 phy_interface_t phy_mode, 731 struct fwnode_handle *portnp) 732 { 733 struct lan966x_port *port; 734 struct phylink *phylink; 735 struct net_device *dev; 736 int err; 737 738 if (p >= lan966x->num_phys_ports) 739 return -EINVAL; 740 741 dev = devm_alloc_etherdev_mqs(lan966x->dev, 742 sizeof(struct lan966x_port), 743 NUM_PRIO_QUEUES, 1); 744 if (!dev) 745 return -ENOMEM; 746 747 SET_NETDEV_DEV(dev, lan966x->dev); 748 port = netdev_priv(dev); 749 port->dev = dev; 750 port->lan966x = lan966x; 751 port->chip_port = p; 752 lan966x->ports[p] = port; 753 754 dev->max_mtu = ETH_MAX_MTU; 755 756 dev->netdev_ops = &lan966x_port_netdev_ops; 757 dev->ethtool_ops = &lan966x_ethtool_ops; 758 dev->features |= NETIF_F_HW_VLAN_CTAG_TX | 759 NETIF_F_HW_VLAN_STAG_TX | 760 NETIF_F_HW_TC; 761 dev->hw_features |= NETIF_F_HW_TC; 762 dev->needed_headroom = IFH_LEN * sizeof(u32); 763 764 eth_hw_addr_gen(dev, lan966x->base_mac, p + 1); 765 766 lan966x_mac_learn(lan966x, PGID_CPU, dev->dev_addr, HOST_PVID, 767 ENTRYTYPE_LOCKED); 768 769 port->phylink_config.dev = &port->dev->dev; 770 port->phylink_config.type = PHYLINK_NETDEV; 771 port->phylink_pcs.poll = true; 772 port->phylink_pcs.ops = &lan966x_phylink_pcs_ops; 773 774 port->phylink_config.mac_capabilities = MAC_ASYM_PAUSE | MAC_SYM_PAUSE | 775 MAC_10 | MAC_100 | MAC_1000FD | MAC_2500FD; 776 777 phy_interface_set_rgmii(port->phylink_config.supported_interfaces); 778 __set_bit(PHY_INTERFACE_MODE_MII, 779 port->phylink_config.supported_interfaces); 780 __set_bit(PHY_INTERFACE_MODE_GMII, 781 port->phylink_config.supported_interfaces); 782 __set_bit(PHY_INTERFACE_MODE_SGMII, 783 port->phylink_config.supported_interfaces); 784 __set_bit(PHY_INTERFACE_MODE_QSGMII, 785 port->phylink_config.supported_interfaces); 786 __set_bit(PHY_INTERFACE_MODE_QUSGMII, 787 port->phylink_config.supported_interfaces); 788 __set_bit(PHY_INTERFACE_MODE_1000BASEX, 789 port->phylink_config.supported_interfaces); 790 __set_bit(PHY_INTERFACE_MODE_2500BASEX, 791 port->phylink_config.supported_interfaces); 792 793 phylink = phylink_create(&port->phylink_config, 794 portnp, 795 phy_mode, 796 &lan966x_phylink_mac_ops); 797 if (IS_ERR(phylink)) { 798 port->dev = NULL; 799 return PTR_ERR(phylink); 800 } 801 802 port->phylink = phylink; 803 804 err = register_netdev(dev); 805 if (err) { 806 dev_err(lan966x->dev, "register_netdev failed\n"); 807 return err; 808 } 809 810 lan966x_vlan_port_set_vlan_aware(port, 0); 811 lan966x_vlan_port_set_vid(port, HOST_PVID, false, false); 812 lan966x_vlan_port_apply(port); 813 814 return 0; 815 } 816 817 static void lan966x_init(struct lan966x *lan966x) 818 { 819 u32 p, i; 820 821 /* MAC table initialization */ 822 lan966x_mac_init(lan966x); 823 824 lan966x_vlan_init(lan966x); 825 826 /* Flush queues */ 827 lan_wr(lan_rd(lan966x, QS_XTR_FLUSH) | 828 GENMASK(1, 0), 829 lan966x, QS_XTR_FLUSH); 830 831 /* Allow to drain */ 832 mdelay(1); 833 834 /* All Queues normal */ 835 lan_wr(lan_rd(lan966x, QS_XTR_FLUSH) & 836 ~(GENMASK(1, 0)), 837 lan966x, QS_XTR_FLUSH); 838 839 /* Set MAC age time to default value, the entry is aged after 840 * 2 * AGE_PERIOD 841 */ 842 lan_wr(ANA_AUTOAGE_AGE_PERIOD_SET(BR_DEFAULT_AGEING_TIME / 2 / HZ), 843 lan966x, ANA_AUTOAGE); 844 845 /* Disable learning for frames discarded by VLAN ingress filtering */ 846 lan_rmw(ANA_ADVLEARN_VLAN_CHK_SET(1), 847 ANA_ADVLEARN_VLAN_CHK, 848 lan966x, ANA_ADVLEARN); 849 850 /* Setup frame ageing - "2 sec" - The unit is 6.5 us on lan966x */ 851 lan_wr(SYS_FRM_AGING_AGE_TX_ENA_SET(1) | 852 (20000000 / 65), 853 lan966x, SYS_FRM_AGING); 854 855 /* Map the 8 CPU extraction queues to CPU port */ 856 lan_wr(0, lan966x, QSYS_CPU_GROUP_MAP); 857 858 /* Do byte-swap and expect status after last data word 859 * Extraction: Mode: manual extraction) | Byte_swap 860 */ 861 lan_wr(QS_XTR_GRP_CFG_MODE_SET(lan966x->fdma ? 2 : 1) | 862 QS_XTR_GRP_CFG_BYTE_SWAP_SET(1), 863 lan966x, QS_XTR_GRP_CFG(0)); 864 865 /* Injection: Mode: manual injection | Byte_swap */ 866 lan_wr(QS_INJ_GRP_CFG_MODE_SET(lan966x->fdma ? 2 : 1) | 867 QS_INJ_GRP_CFG_BYTE_SWAP_SET(1), 868 lan966x, QS_INJ_GRP_CFG(0)); 869 870 lan_rmw(QS_INJ_CTRL_GAP_SIZE_SET(0), 871 QS_INJ_CTRL_GAP_SIZE, 872 lan966x, QS_INJ_CTRL(0)); 873 874 /* Enable IFH insertion/parsing on CPU ports */ 875 lan_wr(SYS_PORT_MODE_INCL_INJ_HDR_SET(1) | 876 SYS_PORT_MODE_INCL_XTR_HDR_SET(1), 877 lan966x, SYS_PORT_MODE(CPU_PORT)); 878 879 /* Setup flooding PGIDs */ 880 lan_wr(ANA_FLOODING_IPMC_FLD_MC4_DATA_SET(PGID_MCIPV4) | 881 ANA_FLOODING_IPMC_FLD_MC4_CTRL_SET(PGID_MC) | 882 ANA_FLOODING_IPMC_FLD_MC6_DATA_SET(PGID_MCIPV6) | 883 ANA_FLOODING_IPMC_FLD_MC6_CTRL_SET(PGID_MC), 884 lan966x, ANA_FLOODING_IPMC); 885 886 /* There are 8 priorities */ 887 for (i = 0; i < 8; ++i) 888 lan_rmw(ANA_FLOODING_FLD_MULTICAST_SET(PGID_MC) | 889 ANA_FLOODING_FLD_UNICAST_SET(PGID_UC) | 890 ANA_FLOODING_FLD_BROADCAST_SET(PGID_BC), 891 ANA_FLOODING_FLD_MULTICAST | 892 ANA_FLOODING_FLD_UNICAST | 893 ANA_FLOODING_FLD_BROADCAST, 894 lan966x, ANA_FLOODING(i)); 895 896 for (i = 0; i < PGID_ENTRIES; ++i) 897 /* Set all the entries to obey VLAN_VLAN */ 898 lan_rmw(ANA_PGID_CFG_OBEY_VLAN_SET(1), 899 ANA_PGID_CFG_OBEY_VLAN, 900 lan966x, ANA_PGID_CFG(i)); 901 902 for (p = 0; p < lan966x->num_phys_ports; p++) { 903 /* Disable bridging by default */ 904 lan_rmw(ANA_PGID_PGID_SET(0x0), 905 ANA_PGID_PGID, 906 lan966x, ANA_PGID(p + PGID_SRC)); 907 908 /* Do not forward BPDU frames to the front ports and copy them 909 * to CPU 910 */ 911 lan_wr(0xffff, lan966x, ANA_CPU_FWD_BPDU_CFG(p)); 912 } 913 914 /* Set source buffer size for each priority and each port to 1500 bytes */ 915 for (i = 0; i <= QSYS_Q_RSRV; ++i) { 916 lan_wr(1500 / 64, lan966x, QSYS_RES_CFG(i)); 917 lan_wr(1500 / 64, lan966x, QSYS_RES_CFG(512 + i)); 918 } 919 920 /* Enable switching to/from cpu port */ 921 lan_wr(QSYS_SW_PORT_MODE_PORT_ENA_SET(1) | 922 QSYS_SW_PORT_MODE_SCH_NEXT_CFG_SET(1) | 923 QSYS_SW_PORT_MODE_INGRESS_DROP_MODE_SET(1), 924 lan966x, QSYS_SW_PORT_MODE(CPU_PORT)); 925 926 /* Configure and enable the CPU port */ 927 lan_rmw(ANA_PGID_PGID_SET(0), 928 ANA_PGID_PGID, 929 lan966x, ANA_PGID(CPU_PORT)); 930 lan_rmw(ANA_PGID_PGID_SET(BIT(CPU_PORT)), 931 ANA_PGID_PGID, 932 lan966x, ANA_PGID(PGID_CPU)); 933 934 /* Multicast to all other ports */ 935 lan_rmw(GENMASK(lan966x->num_phys_ports - 1, 0), 936 ANA_PGID_PGID, 937 lan966x, ANA_PGID(PGID_MC)); 938 939 /* This will be controlled by mrouter ports */ 940 lan_rmw(GENMASK(lan966x->num_phys_ports - 1, 0), 941 ANA_PGID_PGID, 942 lan966x, ANA_PGID(PGID_MCIPV4)); 943 944 lan_rmw(GENMASK(lan966x->num_phys_ports - 1, 0), 945 ANA_PGID_PGID, 946 lan966x, ANA_PGID(PGID_MCIPV6)); 947 948 /* Unicast to all other ports */ 949 lan_rmw(GENMASK(lan966x->num_phys_ports - 1, 0), 950 ANA_PGID_PGID, 951 lan966x, ANA_PGID(PGID_UC)); 952 953 /* Broadcast to the CPU port and to other ports */ 954 lan_rmw(ANA_PGID_PGID_SET(BIT(CPU_PORT) | GENMASK(lan966x->num_phys_ports - 1, 0)), 955 ANA_PGID_PGID, 956 lan966x, ANA_PGID(PGID_BC)); 957 958 lan_wr(REW_PORT_CFG_NO_REWRITE_SET(1), 959 lan966x, REW_PORT_CFG(CPU_PORT)); 960 961 lan_rmw(ANA_ANAINTR_INTR_ENA_SET(1), 962 ANA_ANAINTR_INTR_ENA, 963 lan966x, ANA_ANAINTR); 964 965 spin_lock_init(&lan966x->tx_lock); 966 967 lan966x_taprio_init(lan966x); 968 } 969 970 static int lan966x_ram_init(struct lan966x *lan966x) 971 { 972 return lan_rd(lan966x, SYS_RAM_INIT); 973 } 974 975 static int lan966x_reset_switch(struct lan966x *lan966x) 976 { 977 struct reset_control *switch_reset; 978 int val = 0; 979 int ret; 980 981 switch_reset = devm_reset_control_get_optional_shared(lan966x->dev, 982 "switch"); 983 if (IS_ERR(switch_reset)) 984 return dev_err_probe(lan966x->dev, PTR_ERR(switch_reset), 985 "Could not obtain switch reset"); 986 987 reset_control_reset(switch_reset); 988 989 lan_wr(SYS_RESET_CFG_CORE_ENA_SET(0), lan966x, SYS_RESET_CFG); 990 lan_wr(SYS_RAM_INIT_RAM_INIT_SET(1), lan966x, SYS_RAM_INIT); 991 ret = readx_poll_timeout(lan966x_ram_init, lan966x, 992 val, (val & BIT(1)) == 0, READL_SLEEP_US, 993 READL_TIMEOUT_US); 994 if (ret) 995 return ret; 996 997 lan_wr(SYS_RESET_CFG_CORE_ENA_SET(1), lan966x, SYS_RESET_CFG); 998 999 return 0; 1000 } 1001 1002 static int lan966x_probe(struct platform_device *pdev) 1003 { 1004 struct fwnode_handle *ports, *portnp; 1005 struct lan966x *lan966x; 1006 u8 mac_addr[ETH_ALEN]; 1007 int err; 1008 1009 lan966x = devm_kzalloc(&pdev->dev, sizeof(*lan966x), GFP_KERNEL); 1010 if (!lan966x) 1011 return -ENOMEM; 1012 1013 platform_set_drvdata(pdev, lan966x); 1014 lan966x->dev = &pdev->dev; 1015 1016 if (!device_get_mac_address(&pdev->dev, mac_addr)) { 1017 ether_addr_copy(lan966x->base_mac, mac_addr); 1018 } else { 1019 pr_info("MAC addr was not set, use random MAC\n"); 1020 eth_random_addr(lan966x->base_mac); 1021 lan966x->base_mac[5] &= 0xf0; 1022 } 1023 1024 ports = device_get_named_child_node(&pdev->dev, "ethernet-ports"); 1025 if (!ports) 1026 return dev_err_probe(&pdev->dev, -ENODEV, 1027 "no ethernet-ports child found\n"); 1028 1029 err = lan966x_create_targets(pdev, lan966x); 1030 if (err) 1031 return dev_err_probe(&pdev->dev, err, 1032 "Failed to create targets"); 1033 1034 err = lan966x_reset_switch(lan966x); 1035 if (err) 1036 return dev_err_probe(&pdev->dev, err, "Reset failed"); 1037 1038 lan966x->num_phys_ports = NUM_PHYS_PORTS; 1039 lan966x->ports = devm_kcalloc(&pdev->dev, lan966x->num_phys_ports, 1040 sizeof(struct lan966x_port *), 1041 GFP_KERNEL); 1042 if (!lan966x->ports) 1043 return -ENOMEM; 1044 1045 /* There QS system has 32KB of memory */ 1046 lan966x->shared_queue_sz = LAN966X_BUFFER_MEMORY; 1047 1048 /* set irq */ 1049 lan966x->xtr_irq = platform_get_irq_byname(pdev, "xtr"); 1050 if (lan966x->xtr_irq <= 0) 1051 return -EINVAL; 1052 1053 err = devm_request_threaded_irq(&pdev->dev, lan966x->xtr_irq, NULL, 1054 lan966x_xtr_irq_handler, IRQF_ONESHOT, 1055 "frame extraction", lan966x); 1056 if (err) { 1057 pr_err("Unable to use xtr irq"); 1058 return -ENODEV; 1059 } 1060 1061 lan966x->ana_irq = platform_get_irq_byname(pdev, "ana"); 1062 if (lan966x->ana_irq > 0) { 1063 err = devm_request_threaded_irq(&pdev->dev, lan966x->ana_irq, NULL, 1064 lan966x_ana_irq_handler, IRQF_ONESHOT, 1065 "ana irq", lan966x); 1066 if (err) 1067 return dev_err_probe(&pdev->dev, err, "Unable to use ana irq"); 1068 } 1069 1070 lan966x->ptp_irq = platform_get_irq_byname(pdev, "ptp"); 1071 if (lan966x->ptp_irq > 0) { 1072 err = devm_request_threaded_irq(&pdev->dev, lan966x->ptp_irq, NULL, 1073 lan966x_ptp_irq_handler, IRQF_ONESHOT, 1074 "ptp irq", lan966x); 1075 if (err) 1076 return dev_err_probe(&pdev->dev, err, "Unable to use ptp irq"); 1077 1078 lan966x->ptp = 1; 1079 } 1080 1081 lan966x->fdma_irq = platform_get_irq_byname(pdev, "fdma"); 1082 if (lan966x->fdma_irq > 0) { 1083 err = devm_request_irq(&pdev->dev, lan966x->fdma_irq, 1084 lan966x_fdma_irq_handler, 0, 1085 "fdma irq", lan966x); 1086 if (err) 1087 return dev_err_probe(&pdev->dev, err, "Unable to use fdma irq"); 1088 1089 lan966x->fdma = true; 1090 } 1091 1092 if (lan966x->ptp) { 1093 lan966x->ptp_ext_irq = platform_get_irq_byname(pdev, "ptp-ext"); 1094 if (lan966x->ptp_ext_irq > 0) { 1095 err = devm_request_threaded_irq(&pdev->dev, 1096 lan966x->ptp_ext_irq, NULL, 1097 lan966x_ptp_ext_irq_handler, 1098 IRQF_ONESHOT, 1099 "ptp-ext irq", lan966x); 1100 if (err) 1101 return dev_err_probe(&pdev->dev, err, 1102 "Unable to use ptp-ext irq"); 1103 } 1104 } 1105 1106 /* init switch */ 1107 lan966x_init(lan966x); 1108 lan966x_stats_init(lan966x); 1109 1110 /* go over the child nodes */ 1111 fwnode_for_each_available_child_node(ports, portnp) { 1112 phy_interface_t phy_mode; 1113 struct phy *serdes; 1114 u32 p; 1115 1116 if (fwnode_property_read_u32(portnp, "reg", &p)) 1117 continue; 1118 1119 phy_mode = fwnode_get_phy_mode(portnp); 1120 err = lan966x_probe_port(lan966x, p, phy_mode, portnp); 1121 if (err) 1122 goto cleanup_ports; 1123 1124 /* Read needed configuration */ 1125 lan966x->ports[p]->config.portmode = phy_mode; 1126 lan966x->ports[p]->fwnode = fwnode_handle_get(portnp); 1127 1128 serdes = devm_of_phy_get(lan966x->dev, to_of_node(portnp), NULL); 1129 if (PTR_ERR(serdes) == -ENODEV) 1130 serdes = NULL; 1131 if (IS_ERR(serdes)) { 1132 err = PTR_ERR(serdes); 1133 goto cleanup_ports; 1134 } 1135 lan966x->ports[p]->serdes = serdes; 1136 1137 lan966x_port_init(lan966x->ports[p]); 1138 } 1139 1140 lan966x_mdb_init(lan966x); 1141 err = lan966x_fdb_init(lan966x); 1142 if (err) 1143 goto cleanup_ports; 1144 1145 err = lan966x_ptp_init(lan966x); 1146 if (err) 1147 goto cleanup_fdb; 1148 1149 err = lan966x_fdma_init(lan966x); 1150 if (err) 1151 goto cleanup_ptp; 1152 1153 return 0; 1154 1155 cleanup_ptp: 1156 lan966x_ptp_deinit(lan966x); 1157 1158 cleanup_fdb: 1159 lan966x_fdb_deinit(lan966x); 1160 1161 cleanup_ports: 1162 fwnode_handle_put(portnp); 1163 1164 lan966x_cleanup_ports(lan966x); 1165 1166 cancel_delayed_work_sync(&lan966x->stats_work); 1167 destroy_workqueue(lan966x->stats_queue); 1168 mutex_destroy(&lan966x->stats_lock); 1169 1170 return err; 1171 } 1172 1173 static int lan966x_remove(struct platform_device *pdev) 1174 { 1175 struct lan966x *lan966x = platform_get_drvdata(pdev); 1176 1177 lan966x_taprio_deinit(lan966x); 1178 lan966x_fdma_deinit(lan966x); 1179 lan966x_cleanup_ports(lan966x); 1180 1181 cancel_delayed_work_sync(&lan966x->stats_work); 1182 destroy_workqueue(lan966x->stats_queue); 1183 mutex_destroy(&lan966x->stats_lock); 1184 1185 lan966x_mac_purge_entries(lan966x); 1186 lan966x_mdb_deinit(lan966x); 1187 lan966x_fdb_deinit(lan966x); 1188 lan966x_ptp_deinit(lan966x); 1189 1190 return 0; 1191 } 1192 1193 static struct platform_driver lan966x_driver = { 1194 .probe = lan966x_probe, 1195 .remove = lan966x_remove, 1196 .driver = { 1197 .name = "lan966x-switch", 1198 .of_match_table = lan966x_match, 1199 }, 1200 }; 1201 1202 static int __init lan966x_switch_driver_init(void) 1203 { 1204 int ret; 1205 1206 lan966x_register_notifier_blocks(); 1207 1208 ret = platform_driver_register(&lan966x_driver); 1209 if (ret) 1210 goto err; 1211 1212 return 0; 1213 1214 err: 1215 lan966x_unregister_notifier_blocks(); 1216 return ret; 1217 } 1218 1219 static void __exit lan966x_switch_driver_exit(void) 1220 { 1221 platform_driver_unregister(&lan966x_driver); 1222 lan966x_unregister_notifier_blocks(); 1223 } 1224 1225 module_init(lan966x_switch_driver_init); 1226 module_exit(lan966x_switch_driver_exit); 1227 1228 MODULE_DESCRIPTION("Microchip LAN966X switch driver"); 1229 MODULE_AUTHOR("Horatiu Vultur <horatiu.vultur@microchip.com>"); 1230 MODULE_LICENSE("Dual MIT/GPL"); 1231