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 READL_SLEEP_US 10 28 #define READL_TIMEOUT_US 100000000 29 30 #define IO_RANGES 2 31 32 static const struct of_device_id lan966x_match[] = { 33 { .compatible = "microchip,lan966x-switch" }, 34 { } 35 }; 36 MODULE_DEVICE_TABLE(of, lan966x_match); 37 38 struct lan966x_main_io_resource { 39 enum lan966x_target id; 40 phys_addr_t offset; 41 int range; 42 }; 43 44 static const struct lan966x_main_io_resource lan966x_main_iomap[] = { 45 { TARGET_CPU, 0xc0000, 0 }, /* 0xe00c0000 */ 46 { TARGET_ORG, 0, 1 }, /* 0xe2000000 */ 47 { TARGET_GCB, 0x4000, 1 }, /* 0xe2004000 */ 48 { TARGET_QS, 0x8000, 1 }, /* 0xe2008000 */ 49 { TARGET_PTP, 0xc000, 1 }, /* 0xe200c000 */ 50 { TARGET_CHIP_TOP, 0x10000, 1 }, /* 0xe2010000 */ 51 { TARGET_REW, 0x14000, 1 }, /* 0xe2014000 */ 52 { TARGET_SYS, 0x28000, 1 }, /* 0xe2028000 */ 53 { TARGET_DEV, 0x34000, 1 }, /* 0xe2034000 */ 54 { TARGET_DEV + 1, 0x38000, 1 }, /* 0xe2038000 */ 55 { TARGET_DEV + 2, 0x3c000, 1 }, /* 0xe203c000 */ 56 { TARGET_DEV + 3, 0x40000, 1 }, /* 0xe2040000 */ 57 { TARGET_DEV + 4, 0x44000, 1 }, /* 0xe2044000 */ 58 { TARGET_DEV + 5, 0x48000, 1 }, /* 0xe2048000 */ 59 { TARGET_DEV + 6, 0x4c000, 1 }, /* 0xe204c000 */ 60 { TARGET_DEV + 7, 0x50000, 1 }, /* 0xe2050000 */ 61 { TARGET_QSYS, 0x100000, 1 }, /* 0xe2100000 */ 62 { TARGET_AFI, 0x120000, 1 }, /* 0xe2120000 */ 63 { TARGET_ANA, 0x140000, 1 }, /* 0xe2140000 */ 64 }; 65 66 static int lan966x_create_targets(struct platform_device *pdev, 67 struct lan966x *lan966x) 68 { 69 struct resource *iores[IO_RANGES]; 70 void __iomem *begin[IO_RANGES]; 71 int idx; 72 73 /* Initially map the entire range and after that update each target to 74 * point inside the region at the correct offset. It is possible that 75 * other devices access the same region so don't add any checks about 76 * this. 77 */ 78 for (idx = 0; idx < IO_RANGES; idx++) { 79 iores[idx] = platform_get_resource(pdev, IORESOURCE_MEM, 80 idx); 81 if (!iores[idx]) { 82 dev_err(&pdev->dev, "Invalid resource\n"); 83 return -EINVAL; 84 } 85 86 begin[idx] = devm_ioremap(&pdev->dev, 87 iores[idx]->start, 88 resource_size(iores[idx])); 89 if (!begin[idx]) { 90 dev_err(&pdev->dev, "Unable to get registers: %s\n", 91 iores[idx]->name); 92 return -ENOMEM; 93 } 94 } 95 96 for (idx = 0; idx < ARRAY_SIZE(lan966x_main_iomap); idx++) { 97 const struct lan966x_main_io_resource *iomap = 98 &lan966x_main_iomap[idx]; 99 100 lan966x->regs[iomap->id] = begin[iomap->range] + iomap->offset; 101 } 102 103 return 0; 104 } 105 106 static int lan966x_port_set_mac_address(struct net_device *dev, void *p) 107 { 108 struct lan966x_port *port = netdev_priv(dev); 109 struct lan966x *lan966x = port->lan966x; 110 const struct sockaddr *addr = p; 111 int ret; 112 113 /* Learn the new net device MAC address in the mac table. */ 114 ret = lan966x_mac_cpu_learn(lan966x, addr->sa_data, HOST_PVID); 115 if (ret) 116 return ret; 117 118 /* Then forget the previous one. */ 119 ret = lan966x_mac_cpu_forget(lan966x, dev->dev_addr, HOST_PVID); 120 if (ret) 121 return ret; 122 123 eth_hw_addr_set(dev, addr->sa_data); 124 return ret; 125 } 126 127 static int lan966x_port_get_phys_port_name(struct net_device *dev, 128 char *buf, size_t len) 129 { 130 struct lan966x_port *port = netdev_priv(dev); 131 int ret; 132 133 ret = snprintf(buf, len, "p%d", port->chip_port); 134 if (ret >= len) 135 return -EINVAL; 136 137 return 0; 138 } 139 140 static int lan966x_port_open(struct net_device *dev) 141 { 142 struct lan966x_port *port = netdev_priv(dev); 143 struct lan966x *lan966x = port->lan966x; 144 int err; 145 146 /* Enable receiving frames on the port, and activate auto-learning of 147 * MAC addresses. 148 */ 149 lan_rmw(ANA_PORT_CFG_LEARNAUTO_SET(1) | 150 ANA_PORT_CFG_RECV_ENA_SET(1) | 151 ANA_PORT_CFG_PORTID_VAL_SET(port->chip_port), 152 ANA_PORT_CFG_LEARNAUTO | 153 ANA_PORT_CFG_RECV_ENA | 154 ANA_PORT_CFG_PORTID_VAL, 155 lan966x, ANA_PORT_CFG(port->chip_port)); 156 157 err = phylink_fwnode_phy_connect(port->phylink, port->fwnode, 0); 158 if (err) { 159 netdev_err(dev, "Could not attach to PHY\n"); 160 return err; 161 } 162 163 phylink_start(port->phylink); 164 165 return 0; 166 } 167 168 static int lan966x_port_stop(struct net_device *dev) 169 { 170 struct lan966x_port *port = netdev_priv(dev); 171 172 lan966x_port_config_down(port); 173 phylink_stop(port->phylink); 174 phylink_disconnect_phy(port->phylink); 175 176 return 0; 177 } 178 179 static int lan966x_port_inj_status(struct lan966x *lan966x) 180 { 181 return lan_rd(lan966x, QS_INJ_STATUS); 182 } 183 184 static int lan966x_port_inj_ready(struct lan966x *lan966x, u8 grp) 185 { 186 u32 val; 187 188 if (lan_rd(lan966x, QS_INJ_STATUS) & QS_INJ_STATUS_FIFO_RDY_SET(BIT(grp))) 189 return 0; 190 191 return readx_poll_timeout_atomic(lan966x_port_inj_status, lan966x, val, 192 QS_INJ_STATUS_FIFO_RDY_GET(val) & BIT(grp), 193 READL_SLEEP_US, READL_TIMEOUT_US); 194 } 195 196 static int lan966x_port_ifh_xmit(struct sk_buff *skb, 197 __be32 *ifh, 198 struct net_device *dev) 199 { 200 struct lan966x_port *port = netdev_priv(dev); 201 struct lan966x *lan966x = port->lan966x; 202 u32 i, count, last; 203 u8 grp = 0; 204 u32 val; 205 int err; 206 207 val = lan_rd(lan966x, QS_INJ_STATUS); 208 if (!(QS_INJ_STATUS_FIFO_RDY_GET(val) & BIT(grp)) || 209 (QS_INJ_STATUS_WMARK_REACHED_GET(val) & BIT(grp))) 210 goto err; 211 212 /* Write start of frame */ 213 lan_wr(QS_INJ_CTRL_GAP_SIZE_SET(1) | 214 QS_INJ_CTRL_SOF_SET(1), 215 lan966x, QS_INJ_CTRL(grp)); 216 217 /* Write IFH header */ 218 for (i = 0; i < IFH_LEN; ++i) { 219 /* Wait until the fifo is ready */ 220 err = lan966x_port_inj_ready(lan966x, grp); 221 if (err) 222 goto err; 223 224 lan_wr((__force u32)ifh[i], lan966x, QS_INJ_WR(grp)); 225 } 226 227 /* Write frame */ 228 count = DIV_ROUND_UP(skb->len, 4); 229 last = skb->len % 4; 230 for (i = 0; i < count; ++i) { 231 /* Wait until the fifo is ready */ 232 err = lan966x_port_inj_ready(lan966x, grp); 233 if (err) 234 goto err; 235 236 lan_wr(((u32 *)skb->data)[i], lan966x, QS_INJ_WR(grp)); 237 } 238 239 /* Add padding */ 240 while (i < (LAN966X_BUFFER_MIN_SZ / 4)) { 241 /* Wait until the fifo is ready */ 242 err = lan966x_port_inj_ready(lan966x, grp); 243 if (err) 244 goto err; 245 246 lan_wr(0, lan966x, QS_INJ_WR(grp)); 247 ++i; 248 } 249 250 /* Inidcate EOF and valid bytes in the last word */ 251 lan_wr(QS_INJ_CTRL_GAP_SIZE_SET(1) | 252 QS_INJ_CTRL_VLD_BYTES_SET(skb->len < LAN966X_BUFFER_MIN_SZ ? 253 0 : last) | 254 QS_INJ_CTRL_EOF_SET(1), 255 lan966x, QS_INJ_CTRL(grp)); 256 257 /* Add dummy CRC */ 258 lan_wr(0, lan966x, QS_INJ_WR(grp)); 259 skb_tx_timestamp(skb); 260 261 dev->stats.tx_packets++; 262 dev->stats.tx_bytes += skb->len; 263 264 if (skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP && 265 LAN966X_SKB_CB(skb)->rew_op == IFH_REW_OP_TWO_STEP_PTP) 266 return NETDEV_TX_OK; 267 268 dev_consume_skb_any(skb); 269 return NETDEV_TX_OK; 270 271 err: 272 if (skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP && 273 LAN966X_SKB_CB(skb)->rew_op == IFH_REW_OP_TWO_STEP_PTP) 274 lan966x_ptp_txtstamp_release(port, skb); 275 276 return NETDEV_TX_BUSY; 277 } 278 279 static void lan966x_ifh_set_bypass(void *ifh, u64 bypass) 280 { 281 packing(ifh, &bypass, IFH_POS_BYPASS + IFH_WID_BYPASS - 1, 282 IFH_POS_BYPASS, IFH_LEN * 4, PACK, 0); 283 } 284 285 static void lan966x_ifh_set_port(void *ifh, u64 bypass) 286 { 287 packing(ifh, &bypass, IFH_POS_DSTS + IFH_WID_DSTS - 1, 288 IFH_POS_DSTS, IFH_LEN * 4, PACK, 0); 289 } 290 291 static void lan966x_ifh_set_qos_class(void *ifh, u64 bypass) 292 { 293 packing(ifh, &bypass, IFH_POS_QOS_CLASS + IFH_WID_QOS_CLASS - 1, 294 IFH_POS_QOS_CLASS, IFH_LEN * 4, PACK, 0); 295 } 296 297 static void lan966x_ifh_set_ipv(void *ifh, u64 bypass) 298 { 299 packing(ifh, &bypass, IFH_POS_IPV + IFH_WID_IPV - 1, 300 IFH_POS_IPV, IFH_LEN * 4, PACK, 0); 301 } 302 303 static void lan966x_ifh_set_vid(void *ifh, u64 vid) 304 { 305 packing(ifh, &vid, IFH_POS_TCI + IFH_WID_TCI - 1, 306 IFH_POS_TCI, IFH_LEN * 4, PACK, 0); 307 } 308 309 static void lan966x_ifh_set_rew_op(void *ifh, u64 rew_op) 310 { 311 packing(ifh, &rew_op, IFH_POS_REW_CMD + IFH_WID_REW_CMD - 1, 312 IFH_POS_REW_CMD, IFH_LEN * 4, PACK, 0); 313 } 314 315 static void lan966x_ifh_set_timestamp(void *ifh, u64 timestamp) 316 { 317 packing(ifh, ×tamp, IFH_POS_TIMESTAMP + IFH_WID_TIMESTAMP - 1, 318 IFH_POS_TIMESTAMP, IFH_LEN * 4, PACK, 0); 319 } 320 321 static int lan966x_port_xmit(struct sk_buff *skb, struct net_device *dev) 322 { 323 struct lan966x_port *port = netdev_priv(dev); 324 struct lan966x *lan966x = port->lan966x; 325 __be32 ifh[IFH_LEN]; 326 int err; 327 328 memset(ifh, 0x0, sizeof(__be32) * IFH_LEN); 329 330 lan966x_ifh_set_bypass(ifh, 1); 331 lan966x_ifh_set_port(ifh, BIT_ULL(port->chip_port)); 332 lan966x_ifh_set_qos_class(ifh, skb->priority >= 7 ? 0x7 : skb->priority); 333 lan966x_ifh_set_ipv(ifh, skb->priority >= 7 ? 0x7 : skb->priority); 334 lan966x_ifh_set_vid(ifh, skb_vlan_tag_get(skb)); 335 336 if (port->lan966x->ptp && skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP) { 337 err = lan966x_ptp_txtstamp_request(port, skb); 338 if (err) 339 return err; 340 341 lan966x_ifh_set_rew_op(ifh, LAN966X_SKB_CB(skb)->rew_op); 342 lan966x_ifh_set_timestamp(ifh, LAN966X_SKB_CB(skb)->ts_id); 343 } 344 345 spin_lock(&lan966x->tx_lock); 346 err = lan966x_port_ifh_xmit(skb, ifh, dev); 347 spin_unlock(&lan966x->tx_lock); 348 349 return err; 350 } 351 352 static int lan966x_port_change_mtu(struct net_device *dev, int new_mtu) 353 { 354 struct lan966x_port *port = netdev_priv(dev); 355 struct lan966x *lan966x = port->lan966x; 356 357 lan_wr(DEV_MAC_MAXLEN_CFG_MAX_LEN_SET(new_mtu), 358 lan966x, DEV_MAC_MAXLEN_CFG(port->chip_port)); 359 dev->mtu = new_mtu; 360 361 return 0; 362 } 363 364 static int lan966x_mc_unsync(struct net_device *dev, const unsigned char *addr) 365 { 366 struct lan966x_port *port = netdev_priv(dev); 367 struct lan966x *lan966x = port->lan966x; 368 369 return lan966x_mac_forget(lan966x, addr, HOST_PVID, ENTRYTYPE_LOCKED); 370 } 371 372 static int lan966x_mc_sync(struct net_device *dev, const unsigned char *addr) 373 { 374 struct lan966x_port *port = netdev_priv(dev); 375 struct lan966x *lan966x = port->lan966x; 376 377 return lan966x_mac_cpu_learn(lan966x, addr, HOST_PVID); 378 } 379 380 static void lan966x_port_set_rx_mode(struct net_device *dev) 381 { 382 __dev_mc_sync(dev, lan966x_mc_sync, lan966x_mc_unsync); 383 } 384 385 static int lan966x_port_get_parent_id(struct net_device *dev, 386 struct netdev_phys_item_id *ppid) 387 { 388 struct lan966x_port *port = netdev_priv(dev); 389 struct lan966x *lan966x = port->lan966x; 390 391 ppid->id_len = sizeof(lan966x->base_mac); 392 memcpy(&ppid->id, &lan966x->base_mac, ppid->id_len); 393 394 return 0; 395 } 396 397 static int lan966x_port_ioctl(struct net_device *dev, struct ifreq *ifr, 398 int cmd) 399 { 400 struct lan966x_port *port = netdev_priv(dev); 401 402 if (!phy_has_hwtstamp(dev->phydev) && port->lan966x->ptp) { 403 switch (cmd) { 404 case SIOCSHWTSTAMP: 405 return lan966x_ptp_hwtstamp_set(port, ifr); 406 case SIOCGHWTSTAMP: 407 return lan966x_ptp_hwtstamp_get(port, ifr); 408 } 409 } 410 411 return phy_mii_ioctl(dev->phydev, ifr, cmd); 412 } 413 414 static const struct net_device_ops lan966x_port_netdev_ops = { 415 .ndo_open = lan966x_port_open, 416 .ndo_stop = lan966x_port_stop, 417 .ndo_start_xmit = lan966x_port_xmit, 418 .ndo_change_mtu = lan966x_port_change_mtu, 419 .ndo_set_rx_mode = lan966x_port_set_rx_mode, 420 .ndo_get_phys_port_name = lan966x_port_get_phys_port_name, 421 .ndo_get_stats64 = lan966x_stats_get, 422 .ndo_set_mac_address = lan966x_port_set_mac_address, 423 .ndo_get_port_parent_id = lan966x_port_get_parent_id, 424 .ndo_eth_ioctl = lan966x_port_ioctl, 425 }; 426 427 bool lan966x_netdevice_check(const struct net_device *dev) 428 { 429 return dev->netdev_ops == &lan966x_port_netdev_ops; 430 } 431 432 static bool lan966x_hw_offload(struct lan966x *lan966x, u32 port, 433 struct sk_buff *skb) 434 { 435 u32 val; 436 437 /* The IGMP and MLD frames are not forward by the HW if 438 * multicast snooping is enabled, therefor don't mark as 439 * offload to allow the SW to forward the frames accordingly. 440 */ 441 val = lan_rd(lan966x, ANA_CPU_FWD_CFG(port)); 442 if (!(val & (ANA_CPU_FWD_CFG_IGMP_REDIR_ENA | 443 ANA_CPU_FWD_CFG_MLD_REDIR_ENA))) 444 return true; 445 446 if (skb->protocol == htons(ETH_P_IP) && 447 ip_hdr(skb)->protocol == IPPROTO_IGMP) 448 return false; 449 450 if (IS_ENABLED(CONFIG_IPV6) && 451 skb->protocol == htons(ETH_P_IPV6) && 452 ipv6_addr_is_multicast(&ipv6_hdr(skb)->daddr) && 453 !ipv6_mc_check_mld(skb)) 454 return false; 455 456 return true; 457 } 458 459 static int lan966x_port_xtr_status(struct lan966x *lan966x, u8 grp) 460 { 461 return lan_rd(lan966x, QS_XTR_RD(grp)); 462 } 463 464 static int lan966x_port_xtr_ready(struct lan966x *lan966x, u8 grp) 465 { 466 u32 val; 467 468 return read_poll_timeout(lan966x_port_xtr_status, val, 469 val != XTR_NOT_READY, 470 READL_SLEEP_US, READL_TIMEOUT_US, false, 471 lan966x, grp); 472 } 473 474 static int lan966x_rx_frame_word(struct lan966x *lan966x, u8 grp, u32 *rval) 475 { 476 u32 bytes_valid; 477 u32 val; 478 int err; 479 480 val = lan_rd(lan966x, QS_XTR_RD(grp)); 481 if (val == XTR_NOT_READY) { 482 err = lan966x_port_xtr_ready(lan966x, grp); 483 if (err) 484 return -EIO; 485 } 486 487 switch (val) { 488 case XTR_ABORT: 489 return -EIO; 490 case XTR_EOF_0: 491 case XTR_EOF_1: 492 case XTR_EOF_2: 493 case XTR_EOF_3: 494 case XTR_PRUNED: 495 bytes_valid = XTR_VALID_BYTES(val); 496 val = lan_rd(lan966x, QS_XTR_RD(grp)); 497 if (val == XTR_ESCAPE) 498 *rval = lan_rd(lan966x, QS_XTR_RD(grp)); 499 else 500 *rval = val; 501 502 return bytes_valid; 503 case XTR_ESCAPE: 504 *rval = lan_rd(lan966x, QS_XTR_RD(grp)); 505 506 return 4; 507 default: 508 *rval = val; 509 510 return 4; 511 } 512 } 513 514 static void lan966x_ifh_get_src_port(void *ifh, u64 *src_port) 515 { 516 packing(ifh, src_port, IFH_POS_SRCPORT + IFH_WID_SRCPORT - 1, 517 IFH_POS_SRCPORT, IFH_LEN * 4, UNPACK, 0); 518 } 519 520 static void lan966x_ifh_get_len(void *ifh, u64 *len) 521 { 522 packing(ifh, len, IFH_POS_LEN + IFH_WID_LEN - 1, 523 IFH_POS_LEN, IFH_LEN * 4, UNPACK, 0); 524 } 525 526 static void lan966x_ifh_get_timestamp(void *ifh, u64 *timestamp) 527 { 528 packing(ifh, timestamp, IFH_POS_TIMESTAMP + IFH_WID_TIMESTAMP - 1, 529 IFH_POS_TIMESTAMP, IFH_LEN * 4, UNPACK, 0); 530 } 531 532 static irqreturn_t lan966x_xtr_irq_handler(int irq, void *args) 533 { 534 struct lan966x *lan966x = args; 535 int i, grp = 0, err = 0; 536 537 if (!(lan_rd(lan966x, QS_XTR_DATA_PRESENT) & BIT(grp))) 538 return IRQ_NONE; 539 540 do { 541 u64 src_port, len, timestamp; 542 struct net_device *dev; 543 struct sk_buff *skb; 544 int sz = 0, buf_len; 545 u32 ifh[IFH_LEN]; 546 u32 *buf; 547 u32 val; 548 549 for (i = 0; i < IFH_LEN; i++) { 550 err = lan966x_rx_frame_word(lan966x, grp, &ifh[i]); 551 if (err != 4) 552 goto recover; 553 } 554 555 err = 0; 556 557 lan966x_ifh_get_src_port(ifh, &src_port); 558 lan966x_ifh_get_len(ifh, &len); 559 lan966x_ifh_get_timestamp(ifh, ×tamp); 560 561 WARN_ON(src_port >= lan966x->num_phys_ports); 562 563 dev = lan966x->ports[src_port]->dev; 564 skb = netdev_alloc_skb(dev, len); 565 if (unlikely(!skb)) { 566 netdev_err(dev, "Unable to allocate sk_buff\n"); 567 err = -ENOMEM; 568 break; 569 } 570 buf_len = len - ETH_FCS_LEN; 571 buf = (u32 *)skb_put(skb, buf_len); 572 573 len = 0; 574 do { 575 sz = lan966x_rx_frame_word(lan966x, grp, &val); 576 if (sz < 0) { 577 kfree_skb(skb); 578 goto recover; 579 } 580 581 *buf++ = val; 582 len += sz; 583 } while (len < buf_len); 584 585 /* Read the FCS */ 586 sz = lan966x_rx_frame_word(lan966x, grp, &val); 587 if (sz < 0) { 588 kfree_skb(skb); 589 goto recover; 590 } 591 592 /* Update the statistics if part of the FCS was read before */ 593 len -= ETH_FCS_LEN - sz; 594 595 if (unlikely(dev->features & NETIF_F_RXFCS)) { 596 buf = (u32 *)skb_put(skb, ETH_FCS_LEN); 597 *buf = val; 598 } 599 600 lan966x_ptp_rxtstamp(lan966x, skb, timestamp); 601 skb->protocol = eth_type_trans(skb, dev); 602 603 if (lan966x->bridge_mask & BIT(src_port)) { 604 skb->offload_fwd_mark = 1; 605 606 skb_reset_network_header(skb); 607 if (!lan966x_hw_offload(lan966x, src_port, skb)) 608 skb->offload_fwd_mark = 0; 609 } 610 611 if (!skb_defer_rx_timestamp(skb)) 612 netif_rx(skb); 613 614 dev->stats.rx_bytes += len; 615 dev->stats.rx_packets++; 616 617 recover: 618 if (sz < 0 || err) 619 lan_rd(lan966x, QS_XTR_RD(grp)); 620 621 } while (lan_rd(lan966x, QS_XTR_DATA_PRESENT) & BIT(grp)); 622 623 return IRQ_HANDLED; 624 } 625 626 static irqreturn_t lan966x_ana_irq_handler(int irq, void *args) 627 { 628 struct lan966x *lan966x = args; 629 630 return lan966x_mac_irq_handler(lan966x); 631 } 632 633 static void lan966x_cleanup_ports(struct lan966x *lan966x) 634 { 635 struct lan966x_port *port; 636 int p; 637 638 for (p = 0; p < lan966x->num_phys_ports; p++) { 639 port = lan966x->ports[p]; 640 if (!port) 641 continue; 642 643 if (port->dev) 644 unregister_netdev(port->dev); 645 646 if (port->phylink) { 647 rtnl_lock(); 648 lan966x_port_stop(port->dev); 649 rtnl_unlock(); 650 phylink_destroy(port->phylink); 651 port->phylink = NULL; 652 } 653 654 if (port->fwnode) 655 fwnode_handle_put(port->fwnode); 656 } 657 658 disable_irq(lan966x->xtr_irq); 659 lan966x->xtr_irq = -ENXIO; 660 661 if (lan966x->ana_irq) { 662 disable_irq(lan966x->ana_irq); 663 lan966x->ana_irq = -ENXIO; 664 } 665 } 666 667 static int lan966x_probe_port(struct lan966x *lan966x, u32 p, 668 phy_interface_t phy_mode, 669 struct fwnode_handle *portnp) 670 { 671 struct lan966x_port *port; 672 struct phylink *phylink; 673 struct net_device *dev; 674 int err; 675 676 if (p >= lan966x->num_phys_ports) 677 return -EINVAL; 678 679 dev = devm_alloc_etherdev_mqs(lan966x->dev, 680 sizeof(struct lan966x_port), 8, 1); 681 if (!dev) 682 return -ENOMEM; 683 684 SET_NETDEV_DEV(dev, lan966x->dev); 685 port = netdev_priv(dev); 686 port->dev = dev; 687 port->lan966x = lan966x; 688 port->chip_port = p; 689 lan966x->ports[p] = port; 690 691 dev->max_mtu = ETH_MAX_MTU; 692 693 dev->netdev_ops = &lan966x_port_netdev_ops; 694 dev->ethtool_ops = &lan966x_ethtool_ops; 695 dev->features |= NETIF_F_HW_VLAN_CTAG_TX | 696 NETIF_F_HW_VLAN_STAG_TX; 697 dev->needed_headroom = IFH_LEN * sizeof(u32); 698 699 eth_hw_addr_gen(dev, lan966x->base_mac, p + 1); 700 701 lan966x_mac_learn(lan966x, PGID_CPU, dev->dev_addr, HOST_PVID, 702 ENTRYTYPE_LOCKED); 703 704 port->phylink_config.dev = &port->dev->dev; 705 port->phylink_config.type = PHYLINK_NETDEV; 706 port->phylink_pcs.poll = true; 707 port->phylink_pcs.ops = &lan966x_phylink_pcs_ops; 708 709 port->phylink_config.mac_capabilities = MAC_ASYM_PAUSE | MAC_SYM_PAUSE | 710 MAC_10 | MAC_100 | MAC_1000FD | MAC_2500FD; 711 712 __set_bit(PHY_INTERFACE_MODE_MII, 713 port->phylink_config.supported_interfaces); 714 __set_bit(PHY_INTERFACE_MODE_GMII, 715 port->phylink_config.supported_interfaces); 716 __set_bit(PHY_INTERFACE_MODE_SGMII, 717 port->phylink_config.supported_interfaces); 718 __set_bit(PHY_INTERFACE_MODE_QSGMII, 719 port->phylink_config.supported_interfaces); 720 __set_bit(PHY_INTERFACE_MODE_1000BASEX, 721 port->phylink_config.supported_interfaces); 722 __set_bit(PHY_INTERFACE_MODE_2500BASEX, 723 port->phylink_config.supported_interfaces); 724 725 phylink = phylink_create(&port->phylink_config, 726 portnp, 727 phy_mode, 728 &lan966x_phylink_mac_ops); 729 if (IS_ERR(phylink)) { 730 port->dev = NULL; 731 return PTR_ERR(phylink); 732 } 733 734 port->phylink = phylink; 735 736 err = register_netdev(dev); 737 if (err) { 738 dev_err(lan966x->dev, "register_netdev failed\n"); 739 return err; 740 } 741 742 lan966x_vlan_port_set_vlan_aware(port, 0); 743 lan966x_vlan_port_set_vid(port, HOST_PVID, false, false); 744 lan966x_vlan_port_apply(port); 745 746 return 0; 747 } 748 749 static void lan966x_init(struct lan966x *lan966x) 750 { 751 u32 p, i; 752 753 /* MAC table initialization */ 754 lan966x_mac_init(lan966x); 755 756 lan966x_vlan_init(lan966x); 757 758 /* Flush queues */ 759 lan_wr(lan_rd(lan966x, QS_XTR_FLUSH) | 760 GENMASK(1, 0), 761 lan966x, QS_XTR_FLUSH); 762 763 /* Allow to drain */ 764 mdelay(1); 765 766 /* All Queues normal */ 767 lan_wr(lan_rd(lan966x, QS_XTR_FLUSH) & 768 ~(GENMASK(1, 0)), 769 lan966x, QS_XTR_FLUSH); 770 771 /* Set MAC age time to default value, the entry is aged after 772 * 2 * AGE_PERIOD 773 */ 774 lan_wr(ANA_AUTOAGE_AGE_PERIOD_SET(BR_DEFAULT_AGEING_TIME / 2 / HZ), 775 lan966x, ANA_AUTOAGE); 776 777 /* Disable learning for frames discarded by VLAN ingress filtering */ 778 lan_rmw(ANA_ADVLEARN_VLAN_CHK_SET(1), 779 ANA_ADVLEARN_VLAN_CHK, 780 lan966x, ANA_ADVLEARN); 781 782 /* Setup frame ageing - "2 sec" - The unit is 6.5 us on lan966x */ 783 lan_wr(SYS_FRM_AGING_AGE_TX_ENA_SET(1) | 784 (20000000 / 65), 785 lan966x, SYS_FRM_AGING); 786 787 /* Map the 8 CPU extraction queues to CPU port */ 788 lan_wr(0, lan966x, QSYS_CPU_GROUP_MAP); 789 790 /* Do byte-swap and expect status after last data word 791 * Extraction: Mode: manual extraction) | Byte_swap 792 */ 793 lan_wr(QS_XTR_GRP_CFG_MODE_SET(1) | 794 QS_XTR_GRP_CFG_BYTE_SWAP_SET(1), 795 lan966x, QS_XTR_GRP_CFG(0)); 796 797 /* Injection: Mode: manual injection | Byte_swap */ 798 lan_wr(QS_INJ_GRP_CFG_MODE_SET(1) | 799 QS_INJ_GRP_CFG_BYTE_SWAP_SET(1), 800 lan966x, QS_INJ_GRP_CFG(0)); 801 802 lan_rmw(QS_INJ_CTRL_GAP_SIZE_SET(0), 803 QS_INJ_CTRL_GAP_SIZE, 804 lan966x, QS_INJ_CTRL(0)); 805 806 /* Enable IFH insertion/parsing on CPU ports */ 807 lan_wr(SYS_PORT_MODE_INCL_INJ_HDR_SET(1) | 808 SYS_PORT_MODE_INCL_XTR_HDR_SET(1), 809 lan966x, SYS_PORT_MODE(CPU_PORT)); 810 811 /* Setup flooding PGIDs */ 812 lan_wr(ANA_FLOODING_IPMC_FLD_MC4_DATA_SET(PGID_MCIPV4) | 813 ANA_FLOODING_IPMC_FLD_MC4_CTRL_SET(PGID_MC) | 814 ANA_FLOODING_IPMC_FLD_MC6_DATA_SET(PGID_MCIPV6) | 815 ANA_FLOODING_IPMC_FLD_MC6_CTRL_SET(PGID_MC), 816 lan966x, ANA_FLOODING_IPMC); 817 818 /* There are 8 priorities */ 819 for (i = 0; i < 8; ++i) 820 lan_rmw(ANA_FLOODING_FLD_MULTICAST_SET(PGID_MC) | 821 ANA_FLOODING_FLD_UNICAST_SET(PGID_UC) | 822 ANA_FLOODING_FLD_BROADCAST_SET(PGID_BC), 823 ANA_FLOODING_FLD_MULTICAST | 824 ANA_FLOODING_FLD_UNICAST | 825 ANA_FLOODING_FLD_BROADCAST, 826 lan966x, ANA_FLOODING(i)); 827 828 for (i = 0; i < PGID_ENTRIES; ++i) 829 /* Set all the entries to obey VLAN_VLAN */ 830 lan_rmw(ANA_PGID_CFG_OBEY_VLAN_SET(1), 831 ANA_PGID_CFG_OBEY_VLAN, 832 lan966x, ANA_PGID_CFG(i)); 833 834 for (p = 0; p < lan966x->num_phys_ports; p++) { 835 /* Disable bridging by default */ 836 lan_rmw(ANA_PGID_PGID_SET(0x0), 837 ANA_PGID_PGID, 838 lan966x, ANA_PGID(p + PGID_SRC)); 839 840 /* Do not forward BPDU frames to the front ports and copy them 841 * to CPU 842 */ 843 lan_wr(0xffff, lan966x, ANA_CPU_FWD_BPDU_CFG(p)); 844 } 845 846 /* Set source buffer size for each priority and each port to 1500 bytes */ 847 for (i = 0; i <= QSYS_Q_RSRV; ++i) { 848 lan_wr(1500 / 64, lan966x, QSYS_RES_CFG(i)); 849 lan_wr(1500 / 64, lan966x, QSYS_RES_CFG(512 + i)); 850 } 851 852 /* Enable switching to/from cpu port */ 853 lan_wr(QSYS_SW_PORT_MODE_PORT_ENA_SET(1) | 854 QSYS_SW_PORT_MODE_SCH_NEXT_CFG_SET(1) | 855 QSYS_SW_PORT_MODE_INGRESS_DROP_MODE_SET(1), 856 lan966x, QSYS_SW_PORT_MODE(CPU_PORT)); 857 858 /* Configure and enable the CPU port */ 859 lan_rmw(ANA_PGID_PGID_SET(0), 860 ANA_PGID_PGID, 861 lan966x, ANA_PGID(CPU_PORT)); 862 lan_rmw(ANA_PGID_PGID_SET(BIT(CPU_PORT)), 863 ANA_PGID_PGID, 864 lan966x, ANA_PGID(PGID_CPU)); 865 866 /* Multicast to all other ports */ 867 lan_rmw(GENMASK(lan966x->num_phys_ports - 1, 0), 868 ANA_PGID_PGID, 869 lan966x, ANA_PGID(PGID_MC)); 870 871 /* This will be controlled by mrouter ports */ 872 lan_rmw(GENMASK(lan966x->num_phys_ports - 1, 0), 873 ANA_PGID_PGID, 874 lan966x, ANA_PGID(PGID_MCIPV4)); 875 876 lan_rmw(GENMASK(lan966x->num_phys_ports - 1, 0), 877 ANA_PGID_PGID, 878 lan966x, ANA_PGID(PGID_MCIPV6)); 879 880 /* Unicast to all other ports */ 881 lan_rmw(GENMASK(lan966x->num_phys_ports - 1, 0), 882 ANA_PGID_PGID, 883 lan966x, ANA_PGID(PGID_UC)); 884 885 /* Broadcast to the CPU port and to other ports */ 886 lan_rmw(ANA_PGID_PGID_SET(BIT(CPU_PORT) | GENMASK(lan966x->num_phys_ports - 1, 0)), 887 ANA_PGID_PGID, 888 lan966x, ANA_PGID(PGID_BC)); 889 890 lan_wr(REW_PORT_CFG_NO_REWRITE_SET(1), 891 lan966x, REW_PORT_CFG(CPU_PORT)); 892 893 lan_rmw(ANA_ANAINTR_INTR_ENA_SET(1), 894 ANA_ANAINTR_INTR_ENA, 895 lan966x, ANA_ANAINTR); 896 897 spin_lock_init(&lan966x->tx_lock); 898 } 899 900 static int lan966x_ram_init(struct lan966x *lan966x) 901 { 902 return lan_rd(lan966x, SYS_RAM_INIT); 903 } 904 905 static int lan966x_reset_switch(struct lan966x *lan966x) 906 { 907 struct reset_control *switch_reset, *phy_reset; 908 int val = 0; 909 int ret; 910 911 switch_reset = devm_reset_control_get_shared(lan966x->dev, "switch"); 912 if (IS_ERR(switch_reset)) 913 return dev_err_probe(lan966x->dev, PTR_ERR(switch_reset), 914 "Could not obtain switch reset"); 915 916 phy_reset = devm_reset_control_get_shared(lan966x->dev, "phy"); 917 if (IS_ERR(phy_reset)) 918 return dev_err_probe(lan966x->dev, PTR_ERR(phy_reset), 919 "Could not obtain phy reset\n"); 920 921 reset_control_reset(switch_reset); 922 reset_control_reset(phy_reset); 923 924 lan_wr(SYS_RESET_CFG_CORE_ENA_SET(0), lan966x, SYS_RESET_CFG); 925 lan_wr(SYS_RAM_INIT_RAM_INIT_SET(1), lan966x, SYS_RAM_INIT); 926 ret = readx_poll_timeout(lan966x_ram_init, lan966x, 927 val, (val & BIT(1)) == 0, READL_SLEEP_US, 928 READL_TIMEOUT_US); 929 if (ret) 930 return ret; 931 932 lan_wr(SYS_RESET_CFG_CORE_ENA_SET(1), lan966x, SYS_RESET_CFG); 933 934 return 0; 935 } 936 937 static int lan966x_probe(struct platform_device *pdev) 938 { 939 struct fwnode_handle *ports, *portnp; 940 struct lan966x *lan966x; 941 u8 mac_addr[ETH_ALEN]; 942 int err, i; 943 944 lan966x = devm_kzalloc(&pdev->dev, sizeof(*lan966x), GFP_KERNEL); 945 if (!lan966x) 946 return -ENOMEM; 947 948 platform_set_drvdata(pdev, lan966x); 949 lan966x->dev = &pdev->dev; 950 951 if (!device_get_mac_address(&pdev->dev, mac_addr)) { 952 ether_addr_copy(lan966x->base_mac, mac_addr); 953 } else { 954 pr_info("MAC addr was not set, use random MAC\n"); 955 eth_random_addr(lan966x->base_mac); 956 lan966x->base_mac[5] &= 0xf0; 957 } 958 959 ports = device_get_named_child_node(&pdev->dev, "ethernet-ports"); 960 if (!ports) 961 return dev_err_probe(&pdev->dev, -ENODEV, 962 "no ethernet-ports child found\n"); 963 964 err = lan966x_create_targets(pdev, lan966x); 965 if (err) 966 return dev_err_probe(&pdev->dev, err, 967 "Failed to create targets"); 968 969 err = lan966x_reset_switch(lan966x); 970 if (err) 971 return dev_err_probe(&pdev->dev, err, "Reset failed"); 972 973 i = 0; 974 fwnode_for_each_available_child_node(ports, portnp) 975 ++i; 976 977 lan966x->num_phys_ports = i; 978 lan966x->ports = devm_kcalloc(&pdev->dev, lan966x->num_phys_ports, 979 sizeof(struct lan966x_port *), 980 GFP_KERNEL); 981 if (!lan966x->ports) 982 return -ENOMEM; 983 984 /* There QS system has 32KB of memory */ 985 lan966x->shared_queue_sz = LAN966X_BUFFER_MEMORY; 986 987 /* set irq */ 988 lan966x->xtr_irq = platform_get_irq_byname(pdev, "xtr"); 989 if (lan966x->xtr_irq <= 0) 990 return -EINVAL; 991 992 err = devm_request_threaded_irq(&pdev->dev, lan966x->xtr_irq, NULL, 993 lan966x_xtr_irq_handler, IRQF_ONESHOT, 994 "frame extraction", lan966x); 995 if (err) { 996 pr_err("Unable to use xtr irq"); 997 return -ENODEV; 998 } 999 1000 lan966x->ana_irq = platform_get_irq_byname(pdev, "ana"); 1001 if (lan966x->ana_irq) { 1002 err = devm_request_threaded_irq(&pdev->dev, lan966x->ana_irq, NULL, 1003 lan966x_ana_irq_handler, IRQF_ONESHOT, 1004 "ana irq", lan966x); 1005 if (err) 1006 return dev_err_probe(&pdev->dev, err, "Unable to use ana irq"); 1007 } 1008 1009 lan966x->ptp_irq = platform_get_irq_byname(pdev, "ptp"); 1010 if (lan966x->ptp_irq > 0) { 1011 err = devm_request_threaded_irq(&pdev->dev, lan966x->ptp_irq, NULL, 1012 lan966x_ptp_irq_handler, IRQF_ONESHOT, 1013 "ptp irq", lan966x); 1014 if (err) 1015 return dev_err_probe(&pdev->dev, err, "Unable to use ptp irq"); 1016 1017 lan966x->ptp = 1; 1018 } 1019 1020 /* init switch */ 1021 lan966x_init(lan966x); 1022 lan966x_stats_init(lan966x); 1023 1024 /* go over the child nodes */ 1025 fwnode_for_each_available_child_node(ports, portnp) { 1026 phy_interface_t phy_mode; 1027 struct phy *serdes; 1028 u32 p; 1029 1030 if (fwnode_property_read_u32(portnp, "reg", &p)) 1031 continue; 1032 1033 phy_mode = fwnode_get_phy_mode(portnp); 1034 err = lan966x_probe_port(lan966x, p, phy_mode, portnp); 1035 if (err) 1036 goto cleanup_ports; 1037 1038 /* Read needed configuration */ 1039 lan966x->ports[p]->config.portmode = phy_mode; 1040 lan966x->ports[p]->fwnode = fwnode_handle_get(portnp); 1041 1042 serdes = devm_of_phy_get(lan966x->dev, to_of_node(portnp), NULL); 1043 if (!IS_ERR(serdes)) 1044 lan966x->ports[p]->serdes = serdes; 1045 1046 lan966x_port_init(lan966x->ports[p]); 1047 } 1048 1049 lan966x_mdb_init(lan966x); 1050 err = lan966x_fdb_init(lan966x); 1051 if (err) 1052 goto cleanup_ports; 1053 1054 err = lan966x_ptp_init(lan966x); 1055 if (err) 1056 goto cleanup_fdb; 1057 1058 return 0; 1059 1060 cleanup_fdb: 1061 lan966x_fdb_deinit(lan966x); 1062 1063 cleanup_ports: 1064 fwnode_handle_put(portnp); 1065 1066 lan966x_cleanup_ports(lan966x); 1067 1068 cancel_delayed_work_sync(&lan966x->stats_work); 1069 destroy_workqueue(lan966x->stats_queue); 1070 mutex_destroy(&lan966x->stats_lock); 1071 1072 return err; 1073 } 1074 1075 static int lan966x_remove(struct platform_device *pdev) 1076 { 1077 struct lan966x *lan966x = platform_get_drvdata(pdev); 1078 1079 lan966x_cleanup_ports(lan966x); 1080 1081 cancel_delayed_work_sync(&lan966x->stats_work); 1082 destroy_workqueue(lan966x->stats_queue); 1083 mutex_destroy(&lan966x->stats_lock); 1084 1085 lan966x_mac_purge_entries(lan966x); 1086 lan966x_mdb_deinit(lan966x); 1087 lan966x_fdb_deinit(lan966x); 1088 lan966x_ptp_deinit(lan966x); 1089 1090 return 0; 1091 } 1092 1093 static struct platform_driver lan966x_driver = { 1094 .probe = lan966x_probe, 1095 .remove = lan966x_remove, 1096 .driver = { 1097 .name = "lan966x-switch", 1098 .of_match_table = lan966x_match, 1099 }, 1100 }; 1101 1102 static int __init lan966x_switch_driver_init(void) 1103 { 1104 int ret; 1105 1106 lan966x_register_notifier_blocks(); 1107 1108 ret = platform_driver_register(&lan966x_driver); 1109 if (ret) 1110 goto err; 1111 1112 return 0; 1113 1114 err: 1115 lan966x_unregister_notifier_blocks(); 1116 return ret; 1117 } 1118 1119 static void __exit lan966x_switch_driver_exit(void) 1120 { 1121 platform_driver_unregister(&lan966x_driver); 1122 lan966x_unregister_notifier_blocks(); 1123 } 1124 1125 module_init(lan966x_switch_driver_init); 1126 module_exit(lan966x_switch_driver_exit); 1127 1128 MODULE_DESCRIPTION("Microchip LAN966X switch driver"); 1129 MODULE_AUTHOR("Horatiu Vultur <horatiu.vultur@microchip.com>"); 1130 MODULE_LICENSE("Dual MIT/GPL"); 1131