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.h>
9 #include <linux/of_net.h>
10 #include <linux/phy/phy.h>
11 #include <linux/platform_device.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_VCAP,                  0x18000, 1 }, /* 0xe2018000 */
51 	{ TARGET_VCAP + 1,              0x20000, 1 }, /* 0xe2020000 */
52 	{ TARGET_VCAP + 2,              0x24000, 1 }, /* 0xe2024000 */
53 	{ TARGET_SYS,                   0x28000, 1 }, /* 0xe2028000 */
54 	{ TARGET_DEV,                   0x34000, 1 }, /* 0xe2034000 */
55 	{ TARGET_DEV +  1,              0x38000, 1 }, /* 0xe2038000 */
56 	{ TARGET_DEV +  2,              0x3c000, 1 }, /* 0xe203c000 */
57 	{ TARGET_DEV +  3,              0x40000, 1 }, /* 0xe2040000 */
58 	{ TARGET_DEV +  4,              0x44000, 1 }, /* 0xe2044000 */
59 	{ TARGET_DEV +  5,              0x48000, 1 }, /* 0xe2048000 */
60 	{ TARGET_DEV +  6,              0x4c000, 1 }, /* 0xe204c000 */
61 	{ TARGET_DEV +  7,              0x50000, 1 }, /* 0xe2050000 */
62 	{ TARGET_QSYS,                 0x100000, 1 }, /* 0xe2100000 */
63 	{ TARGET_AFI,                  0x120000, 1 }, /* 0xe2120000 */
64 	{ TARGET_ANA,                  0x140000, 1 }, /* 0xe2140000 */
65 };
66 
67 static int lan966x_create_targets(struct platform_device *pdev,
68 				  struct lan966x *lan966x)
69 {
70 	struct resource *iores[IO_RANGES];
71 	void __iomem *begin[IO_RANGES];
72 	int idx;
73 
74 	/* Initially map the entire range and after that update each target to
75 	 * point inside the region at the correct offset. It is possible that
76 	 * other devices access the same region so don't add any checks about
77 	 * this.
78 	 */
79 	for (idx = 0; idx < IO_RANGES; idx++) {
80 		iores[idx] = platform_get_resource(pdev, IORESOURCE_MEM,
81 						   idx);
82 		if (!iores[idx]) {
83 			dev_err(&pdev->dev, "Invalid resource\n");
84 			return -EINVAL;
85 		}
86 
87 		begin[idx] = devm_ioremap(&pdev->dev,
88 					  iores[idx]->start,
89 					  resource_size(iores[idx]));
90 		if (!begin[idx]) {
91 			dev_err(&pdev->dev, "Unable to get registers: %s\n",
92 				iores[idx]->name);
93 			return -ENOMEM;
94 		}
95 	}
96 
97 	for (idx = 0; idx < ARRAY_SIZE(lan966x_main_iomap); idx++) {
98 		const struct lan966x_main_io_resource *iomap =
99 			&lan966x_main_iomap[idx];
100 
101 		lan966x->regs[iomap->id] = begin[iomap->range] + iomap->offset;
102 	}
103 
104 	return 0;
105 }
106 
107 static bool lan966x_port_unique_address(struct net_device *dev)
108 {
109 	struct lan966x_port *port = netdev_priv(dev);
110 	struct lan966x *lan966x = port->lan966x;
111 	int p;
112 
113 	for (p = 0; p < lan966x->num_phys_ports; ++p) {
114 		port = lan966x->ports[p];
115 		if (!port || port->dev == dev)
116 			continue;
117 
118 		if (ether_addr_equal(dev->dev_addr, port->dev->dev_addr))
119 			return false;
120 	}
121 
122 	return true;
123 }
124 
125 static int lan966x_port_set_mac_address(struct net_device *dev, void *p)
126 {
127 	struct lan966x_port *port = netdev_priv(dev);
128 	struct lan966x *lan966x = port->lan966x;
129 	const struct sockaddr *addr = p;
130 	int ret;
131 
132 	if (ether_addr_equal(addr->sa_data, dev->dev_addr))
133 		return 0;
134 
135 	/* Learn the new net device MAC address in the mac table. */
136 	ret = lan966x_mac_cpu_learn(lan966x, addr->sa_data, HOST_PVID);
137 	if (ret)
138 		return ret;
139 
140 	/* If there is another port with the same address as the dev, then don't
141 	 * delete it from the MAC table
142 	 */
143 	if (!lan966x_port_unique_address(dev))
144 		goto out;
145 
146 	/* Then forget the previous one. */
147 	ret = lan966x_mac_cpu_forget(lan966x, dev->dev_addr, HOST_PVID);
148 	if (ret)
149 		return ret;
150 
151 out:
152 	eth_hw_addr_set(dev, addr->sa_data);
153 	return ret;
154 }
155 
156 static int lan966x_port_get_phys_port_name(struct net_device *dev,
157 					   char *buf, size_t len)
158 {
159 	struct lan966x_port *port = netdev_priv(dev);
160 	int ret;
161 
162 	ret = snprintf(buf, len, "p%d", port->chip_port);
163 	if (ret >= len)
164 		return -EINVAL;
165 
166 	return 0;
167 }
168 
169 static int lan966x_port_open(struct net_device *dev)
170 {
171 	struct lan966x_port *port = netdev_priv(dev);
172 	struct lan966x *lan966x = port->lan966x;
173 	int err;
174 
175 	/* Enable receiving frames on the port, and activate auto-learning of
176 	 * MAC addresses.
177 	 */
178 	lan_rmw(ANA_PORT_CFG_LEARNAUTO_SET(1) |
179 		ANA_PORT_CFG_RECV_ENA_SET(1) |
180 		ANA_PORT_CFG_PORTID_VAL_SET(port->chip_port),
181 		ANA_PORT_CFG_LEARNAUTO |
182 		ANA_PORT_CFG_RECV_ENA |
183 		ANA_PORT_CFG_PORTID_VAL,
184 		lan966x, ANA_PORT_CFG(port->chip_port));
185 
186 	err = phylink_fwnode_phy_connect(port->phylink, port->fwnode, 0);
187 	if (err) {
188 		netdev_err(dev, "Could not attach to PHY\n");
189 		return err;
190 	}
191 
192 	phylink_start(port->phylink);
193 
194 	return 0;
195 }
196 
197 static int lan966x_port_stop(struct net_device *dev)
198 {
199 	struct lan966x_port *port = netdev_priv(dev);
200 
201 	lan966x_port_config_down(port);
202 	phylink_stop(port->phylink);
203 	phylink_disconnect_phy(port->phylink);
204 
205 	return 0;
206 }
207 
208 static int lan966x_port_inj_status(struct lan966x *lan966x)
209 {
210 	return lan_rd(lan966x, QS_INJ_STATUS);
211 }
212 
213 static int lan966x_port_inj_ready(struct lan966x *lan966x, u8 grp)
214 {
215 	u32 val;
216 
217 	if (lan_rd(lan966x, QS_INJ_STATUS) & QS_INJ_STATUS_FIFO_RDY_SET(BIT(grp)))
218 		return 0;
219 
220 	return readx_poll_timeout_atomic(lan966x_port_inj_status, lan966x, val,
221 					 QS_INJ_STATUS_FIFO_RDY_GET(val) & BIT(grp),
222 					 READL_SLEEP_US, READL_TIMEOUT_US);
223 }
224 
225 static int lan966x_port_ifh_xmit(struct sk_buff *skb,
226 				 __be32 *ifh,
227 				 struct net_device *dev)
228 {
229 	struct lan966x_port *port = netdev_priv(dev);
230 	struct lan966x *lan966x = port->lan966x;
231 	u32 i, count, last;
232 	u8 grp = 0;
233 	u32 val;
234 	int err;
235 
236 	val = lan_rd(lan966x, QS_INJ_STATUS);
237 	if (!(QS_INJ_STATUS_FIFO_RDY_GET(val) & BIT(grp)) ||
238 	    (QS_INJ_STATUS_WMARK_REACHED_GET(val) & BIT(grp)))
239 		goto err;
240 
241 	/* Write start of frame */
242 	lan_wr(QS_INJ_CTRL_GAP_SIZE_SET(1) |
243 	       QS_INJ_CTRL_SOF_SET(1),
244 	       lan966x, QS_INJ_CTRL(grp));
245 
246 	/* Write IFH header */
247 	for (i = 0; i < IFH_LEN; ++i) {
248 		/* Wait until the fifo is ready */
249 		err = lan966x_port_inj_ready(lan966x, grp);
250 		if (err)
251 			goto err;
252 
253 		lan_wr((__force u32)ifh[i], lan966x, QS_INJ_WR(grp));
254 	}
255 
256 	/* Write frame */
257 	count = DIV_ROUND_UP(skb->len, 4);
258 	last = skb->len % 4;
259 	for (i = 0; i < count; ++i) {
260 		/* Wait until the fifo is ready */
261 		err = lan966x_port_inj_ready(lan966x, grp);
262 		if (err)
263 			goto err;
264 
265 		lan_wr(((u32 *)skb->data)[i], lan966x, QS_INJ_WR(grp));
266 	}
267 
268 	/* Add padding */
269 	while (i < (LAN966X_BUFFER_MIN_SZ / 4)) {
270 		/* Wait until the fifo is ready */
271 		err = lan966x_port_inj_ready(lan966x, grp);
272 		if (err)
273 			goto err;
274 
275 		lan_wr(0, lan966x, QS_INJ_WR(grp));
276 		++i;
277 	}
278 
279 	/* Inidcate EOF and valid bytes in the last word */
280 	lan_wr(QS_INJ_CTRL_GAP_SIZE_SET(1) |
281 	       QS_INJ_CTRL_VLD_BYTES_SET(skb->len < LAN966X_BUFFER_MIN_SZ ?
282 				     0 : last) |
283 	       QS_INJ_CTRL_EOF_SET(1),
284 	       lan966x, QS_INJ_CTRL(grp));
285 
286 	/* Add dummy CRC */
287 	lan_wr(0, lan966x, QS_INJ_WR(grp));
288 	skb_tx_timestamp(skb);
289 
290 	dev->stats.tx_packets++;
291 	dev->stats.tx_bytes += skb->len;
292 
293 	if (skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP &&
294 	    LAN966X_SKB_CB(skb)->rew_op == IFH_REW_OP_TWO_STEP_PTP)
295 		return NETDEV_TX_OK;
296 
297 	dev_consume_skb_any(skb);
298 	return NETDEV_TX_OK;
299 
300 err:
301 	if (skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP &&
302 	    LAN966X_SKB_CB(skb)->rew_op == IFH_REW_OP_TWO_STEP_PTP)
303 		lan966x_ptp_txtstamp_release(port, skb);
304 
305 	return NETDEV_TX_BUSY;
306 }
307 
308 static void lan966x_ifh_set(u8 *ifh, size_t val, size_t pos, size_t length)
309 {
310 	int i = 0;
311 
312 	do {
313 		u8 p = IFH_LEN_BYTES - (pos + i) / 8 - 1;
314 		u8 v = val >> i & 0xff;
315 
316 		/* There is no need to check for limits of the array, as these
317 		 * will never be written
318 		 */
319 		ifh[p] |= v << ((pos + i) % 8);
320 		ifh[p - 1] |= v >> (8 - (pos + i) % 8);
321 
322 		i += 8;
323 	} while (i < length);
324 }
325 
326 void lan966x_ifh_set_bypass(void *ifh, u64 bypass)
327 {
328 	lan966x_ifh_set(ifh, bypass, IFH_POS_BYPASS, IFH_WID_BYPASS);
329 }
330 
331 void lan966x_ifh_set_port(void *ifh, u64 port)
332 {
333 	lan966x_ifh_set(ifh, port, IFH_POS_DSTS, IFH_WID_DSTS);
334 }
335 
336 static void lan966x_ifh_set_qos_class(void *ifh, u64 qos)
337 {
338 	lan966x_ifh_set(ifh, qos, IFH_POS_QOS_CLASS, IFH_WID_QOS_CLASS);
339 }
340 
341 static void lan966x_ifh_set_ipv(void *ifh, u64 ipv)
342 {
343 	lan966x_ifh_set(ifh, ipv, IFH_POS_IPV, IFH_WID_IPV);
344 }
345 
346 static void lan966x_ifh_set_vid(void *ifh, u64 vid)
347 {
348 	lan966x_ifh_set(ifh, vid, IFH_POS_TCI, IFH_WID_TCI);
349 }
350 
351 static void lan966x_ifh_set_rew_op(void *ifh, u64 rew_op)
352 {
353 	lan966x_ifh_set(ifh, rew_op, IFH_POS_REW_CMD, IFH_WID_REW_CMD);
354 }
355 
356 static void lan966x_ifh_set_timestamp(void *ifh, u64 timestamp)
357 {
358 	lan966x_ifh_set(ifh, timestamp, IFH_POS_TIMESTAMP, IFH_WID_TIMESTAMP);
359 }
360 
361 static netdev_tx_t lan966x_port_xmit(struct sk_buff *skb,
362 				     struct net_device *dev)
363 {
364 	struct lan966x_port *port = netdev_priv(dev);
365 	struct lan966x *lan966x = port->lan966x;
366 	__be32 ifh[IFH_LEN];
367 	int err;
368 
369 	memset(ifh, 0x0, sizeof(__be32) * IFH_LEN);
370 
371 	lan966x_ifh_set_bypass(ifh, 1);
372 	lan966x_ifh_set_port(ifh, BIT_ULL(port->chip_port));
373 	lan966x_ifh_set_qos_class(ifh, skb->priority >= 7 ? 0x7 : skb->priority);
374 	lan966x_ifh_set_ipv(ifh, skb->priority >= 7 ? 0x7 : skb->priority);
375 	lan966x_ifh_set_vid(ifh, skb_vlan_tag_get(skb));
376 
377 	if (port->lan966x->ptp && skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP) {
378 		err = lan966x_ptp_txtstamp_request(port, skb);
379 		if (err)
380 			return err;
381 
382 		lan966x_ifh_set_rew_op(ifh, LAN966X_SKB_CB(skb)->rew_op);
383 		lan966x_ifh_set_timestamp(ifh, LAN966X_SKB_CB(skb)->ts_id);
384 	}
385 
386 	spin_lock(&lan966x->tx_lock);
387 	if (port->lan966x->fdma)
388 		err = lan966x_fdma_xmit(skb, ifh, dev);
389 	else
390 		err = lan966x_port_ifh_xmit(skb, ifh, dev);
391 	spin_unlock(&lan966x->tx_lock);
392 
393 	return err;
394 }
395 
396 static int lan966x_port_change_mtu(struct net_device *dev, int new_mtu)
397 {
398 	struct lan966x_port *port = netdev_priv(dev);
399 	struct lan966x *lan966x = port->lan966x;
400 	int old_mtu = dev->mtu;
401 	int err;
402 
403 	lan_wr(DEV_MAC_MAXLEN_CFG_MAX_LEN_SET(LAN966X_HW_MTU(new_mtu)),
404 	       lan966x, DEV_MAC_MAXLEN_CFG(port->chip_port));
405 	dev->mtu = new_mtu;
406 
407 	if (!lan966x->fdma)
408 		return 0;
409 
410 	err = lan966x_fdma_change_mtu(lan966x);
411 	if (err) {
412 		lan_wr(DEV_MAC_MAXLEN_CFG_MAX_LEN_SET(LAN966X_HW_MTU(old_mtu)),
413 		       lan966x, DEV_MAC_MAXLEN_CFG(port->chip_port));
414 		dev->mtu = old_mtu;
415 	}
416 
417 	return err;
418 }
419 
420 static int lan966x_mc_unsync(struct net_device *dev, const unsigned char *addr)
421 {
422 	struct lan966x_port *port = netdev_priv(dev);
423 	struct lan966x *lan966x = port->lan966x;
424 
425 	return lan966x_mac_forget(lan966x, addr, HOST_PVID, ENTRYTYPE_LOCKED);
426 }
427 
428 static int lan966x_mc_sync(struct net_device *dev, const unsigned char *addr)
429 {
430 	struct lan966x_port *port = netdev_priv(dev);
431 	struct lan966x *lan966x = port->lan966x;
432 
433 	return lan966x_mac_cpu_learn(lan966x, addr, HOST_PVID);
434 }
435 
436 static void lan966x_port_set_rx_mode(struct net_device *dev)
437 {
438 	__dev_mc_sync(dev, lan966x_mc_sync, lan966x_mc_unsync);
439 }
440 
441 static int lan966x_port_get_parent_id(struct net_device *dev,
442 				      struct netdev_phys_item_id *ppid)
443 {
444 	struct lan966x_port *port = netdev_priv(dev);
445 	struct lan966x *lan966x = port->lan966x;
446 
447 	ppid->id_len = sizeof(lan966x->base_mac);
448 	memcpy(&ppid->id, &lan966x->base_mac, ppid->id_len);
449 
450 	return 0;
451 }
452 
453 static int lan966x_port_hwtstamp_get(struct net_device *dev,
454 				     struct kernel_hwtstamp_config *cfg)
455 {
456 	struct lan966x_port *port = netdev_priv(dev);
457 
458 	if (!port->lan966x->ptp)
459 		return -EOPNOTSUPP;
460 
461 	lan966x_ptp_hwtstamp_get(port, cfg);
462 
463 	return 0;
464 }
465 
466 static int lan966x_port_hwtstamp_set(struct net_device *dev,
467 				     struct kernel_hwtstamp_config *cfg,
468 				     struct netlink_ext_ack *extack)
469 {
470 	struct lan966x_port *port = netdev_priv(dev);
471 	int err;
472 
473 	if (cfg->source != HWTSTAMP_SOURCE_NETDEV &&
474 	    cfg->source != HWTSTAMP_SOURCE_PHYLIB)
475 		return -EOPNOTSUPP;
476 
477 	err = lan966x_ptp_setup_traps(port, cfg);
478 	if (err)
479 		return err;
480 
481 	if (cfg->source == HWTSTAMP_SOURCE_NETDEV) {
482 		if (!port->lan966x->ptp)
483 			return -EOPNOTSUPP;
484 
485 		err = lan966x_ptp_hwtstamp_set(port, cfg, extack);
486 		if (err) {
487 			lan966x_ptp_del_traps(port);
488 			return err;
489 		}
490 	}
491 
492 	return 0;
493 }
494 
495 static const struct net_device_ops lan966x_port_netdev_ops = {
496 	.ndo_open			= lan966x_port_open,
497 	.ndo_stop			= lan966x_port_stop,
498 	.ndo_start_xmit			= lan966x_port_xmit,
499 	.ndo_change_mtu			= lan966x_port_change_mtu,
500 	.ndo_set_rx_mode		= lan966x_port_set_rx_mode,
501 	.ndo_get_phys_port_name		= lan966x_port_get_phys_port_name,
502 	.ndo_get_stats64		= lan966x_stats_get,
503 	.ndo_set_mac_address		= lan966x_port_set_mac_address,
504 	.ndo_get_port_parent_id		= lan966x_port_get_parent_id,
505 	.ndo_eth_ioctl			= phy_do_ioctl,
506 	.ndo_setup_tc			= lan966x_tc_setup,
507 	.ndo_bpf			= lan966x_xdp,
508 	.ndo_xdp_xmit			= lan966x_xdp_xmit,
509 	.ndo_hwtstamp_get		= lan966x_port_hwtstamp_get,
510 	.ndo_hwtstamp_set		= lan966x_port_hwtstamp_set,
511 };
512 
513 bool lan966x_netdevice_check(const struct net_device *dev)
514 {
515 	return dev->netdev_ops == &lan966x_port_netdev_ops;
516 }
517 
518 bool lan966x_hw_offload(struct lan966x *lan966x, u32 port, struct sk_buff *skb)
519 {
520 	u32 val;
521 
522 	/* The IGMP and MLD frames are not forward by the HW if
523 	 * multicast snooping is enabled, therefor don't mark as
524 	 * offload to allow the SW to forward the frames accordingly.
525 	 */
526 	val = lan_rd(lan966x, ANA_CPU_FWD_CFG(port));
527 	if (!(val & (ANA_CPU_FWD_CFG_IGMP_REDIR_ENA |
528 		     ANA_CPU_FWD_CFG_MLD_REDIR_ENA)))
529 		return true;
530 
531 	if (eth_type_vlan(skb->protocol)) {
532 		skb = skb_vlan_untag(skb);
533 		if (unlikely(!skb))
534 			return false;
535 	}
536 
537 	if (skb->protocol == htons(ETH_P_IP) &&
538 	    ip_hdr(skb)->protocol == IPPROTO_IGMP)
539 		return false;
540 
541 	if (IS_ENABLED(CONFIG_IPV6) &&
542 	    skb->protocol == htons(ETH_P_IPV6) &&
543 	    ipv6_addr_is_multicast(&ipv6_hdr(skb)->daddr) &&
544 	    !ipv6_mc_check_mld(skb))
545 		return false;
546 
547 	return true;
548 }
549 
550 static int lan966x_port_xtr_status(struct lan966x *lan966x, u8 grp)
551 {
552 	return lan_rd(lan966x, QS_XTR_RD(grp));
553 }
554 
555 static int lan966x_port_xtr_ready(struct lan966x *lan966x, u8 grp)
556 {
557 	u32 val;
558 
559 	return read_poll_timeout(lan966x_port_xtr_status, val,
560 				 val != XTR_NOT_READY,
561 				 READL_SLEEP_US, READL_TIMEOUT_US, false,
562 				 lan966x, grp);
563 }
564 
565 static int lan966x_rx_frame_word(struct lan966x *lan966x, u8 grp, u32 *rval)
566 {
567 	u32 bytes_valid;
568 	u32 val;
569 	int err;
570 
571 	val = lan_rd(lan966x, QS_XTR_RD(grp));
572 	if (val == XTR_NOT_READY) {
573 		err = lan966x_port_xtr_ready(lan966x, grp);
574 		if (err)
575 			return -EIO;
576 	}
577 
578 	switch (val) {
579 	case XTR_ABORT:
580 		return -EIO;
581 	case XTR_EOF_0:
582 	case XTR_EOF_1:
583 	case XTR_EOF_2:
584 	case XTR_EOF_3:
585 	case XTR_PRUNED:
586 		bytes_valid = XTR_VALID_BYTES(val);
587 		val = lan_rd(lan966x, QS_XTR_RD(grp));
588 		if (val == XTR_ESCAPE)
589 			*rval = lan_rd(lan966x, QS_XTR_RD(grp));
590 		else
591 			*rval = val;
592 
593 		return bytes_valid;
594 	case XTR_ESCAPE:
595 		*rval = lan_rd(lan966x, QS_XTR_RD(grp));
596 
597 		return 4;
598 	default:
599 		*rval = val;
600 
601 		return 4;
602 	}
603 }
604 
605 static u64 lan966x_ifh_get(u8 *ifh, size_t pos, size_t length)
606 {
607 	u64 val = 0;
608 	u8 v;
609 
610 	for (int i = 0; i < length ; i++) {
611 		int j = pos + i;
612 		int k = j % 8;
613 
614 		if (i == 0 || k == 0)
615 			v = ifh[IFH_LEN_BYTES - (j / 8) - 1];
616 
617 		if (v & (1 << k))
618 			val |= (1ULL << i);
619 	}
620 
621 	return val;
622 }
623 
624 void lan966x_ifh_get_src_port(void *ifh, u64 *src_port)
625 {
626 	*src_port = lan966x_ifh_get(ifh, IFH_POS_SRCPORT, IFH_WID_SRCPORT);
627 }
628 
629 static void lan966x_ifh_get_len(void *ifh, u64 *len)
630 {
631 	*len = lan966x_ifh_get(ifh, IFH_POS_LEN, IFH_WID_LEN);
632 }
633 
634 void lan966x_ifh_get_timestamp(void *ifh, u64 *timestamp)
635 {
636 	*timestamp = lan966x_ifh_get(ifh, IFH_POS_TIMESTAMP, IFH_WID_TIMESTAMP);
637 }
638 
639 static irqreturn_t lan966x_xtr_irq_handler(int irq, void *args)
640 {
641 	struct lan966x *lan966x = args;
642 	int i, grp = 0, err = 0;
643 
644 	if (!(lan_rd(lan966x, QS_XTR_DATA_PRESENT) & BIT(grp)))
645 		return IRQ_NONE;
646 
647 	do {
648 		u64 src_port, len, timestamp;
649 		struct net_device *dev;
650 		struct sk_buff *skb;
651 		int sz = 0, buf_len;
652 		u32 ifh[IFH_LEN];
653 		u32 *buf;
654 		u32 val;
655 
656 		for (i = 0; i < IFH_LEN; i++) {
657 			err = lan966x_rx_frame_word(lan966x, grp, &ifh[i]);
658 			if (err != 4)
659 				goto recover;
660 		}
661 
662 		err = 0;
663 
664 		lan966x_ifh_get_src_port(ifh, &src_port);
665 		lan966x_ifh_get_len(ifh, &len);
666 		lan966x_ifh_get_timestamp(ifh, &timestamp);
667 
668 		WARN_ON(src_port >= lan966x->num_phys_ports);
669 
670 		dev = lan966x->ports[src_port]->dev;
671 		skb = netdev_alloc_skb(dev, len);
672 		if (unlikely(!skb)) {
673 			netdev_err(dev, "Unable to allocate sk_buff\n");
674 			err = -ENOMEM;
675 			break;
676 		}
677 		buf_len = len - ETH_FCS_LEN;
678 		buf = (u32 *)skb_put(skb, buf_len);
679 
680 		len = 0;
681 		do {
682 			sz = lan966x_rx_frame_word(lan966x, grp, &val);
683 			if (sz < 0) {
684 				kfree_skb(skb);
685 				goto recover;
686 			}
687 
688 			*buf++ = val;
689 			len += sz;
690 		} while (len < buf_len);
691 
692 		/* Read the FCS */
693 		sz = lan966x_rx_frame_word(lan966x, grp, &val);
694 		if (sz < 0) {
695 			kfree_skb(skb);
696 			goto recover;
697 		}
698 
699 		/* Update the statistics if part of the FCS was read before */
700 		len -= ETH_FCS_LEN - sz;
701 
702 		if (unlikely(dev->features & NETIF_F_RXFCS)) {
703 			buf = (u32 *)skb_put(skb, ETH_FCS_LEN);
704 			*buf = val;
705 		}
706 
707 		lan966x_ptp_rxtstamp(lan966x, skb, src_port, timestamp);
708 		skb->protocol = eth_type_trans(skb, dev);
709 
710 		if (lan966x->bridge_mask & BIT(src_port)) {
711 			skb->offload_fwd_mark = 1;
712 
713 			skb_reset_network_header(skb);
714 			if (!lan966x_hw_offload(lan966x, src_port, skb))
715 				skb->offload_fwd_mark = 0;
716 		}
717 
718 		if (!skb_defer_rx_timestamp(skb))
719 			netif_rx(skb);
720 
721 		dev->stats.rx_bytes += len;
722 		dev->stats.rx_packets++;
723 
724 recover:
725 		if (sz < 0 || err)
726 			lan_rd(lan966x, QS_XTR_RD(grp));
727 
728 	} while (lan_rd(lan966x, QS_XTR_DATA_PRESENT) & BIT(grp));
729 
730 	return IRQ_HANDLED;
731 }
732 
733 static irqreturn_t lan966x_ana_irq_handler(int irq, void *args)
734 {
735 	struct lan966x *lan966x = args;
736 
737 	return lan966x_mac_irq_handler(lan966x);
738 }
739 
740 static void lan966x_cleanup_ports(struct lan966x *lan966x)
741 {
742 	struct lan966x_port *port;
743 	int p;
744 
745 	for (p = 0; p < lan966x->num_phys_ports; p++) {
746 		port = lan966x->ports[p];
747 		if (!port)
748 			continue;
749 
750 		if (port->dev)
751 			unregister_netdev(port->dev);
752 
753 		lan966x_xdp_port_deinit(port);
754 		if (lan966x->fdma && lan966x->fdma_ndev == port->dev)
755 			lan966x_fdma_netdev_deinit(lan966x, port->dev);
756 
757 		if (port->phylink) {
758 			rtnl_lock();
759 			lan966x_port_stop(port->dev);
760 			rtnl_unlock();
761 			phylink_destroy(port->phylink);
762 			port->phylink = NULL;
763 		}
764 
765 		if (port->fwnode)
766 			fwnode_handle_put(port->fwnode);
767 	}
768 
769 	disable_irq(lan966x->xtr_irq);
770 	lan966x->xtr_irq = -ENXIO;
771 
772 	if (lan966x->ana_irq > 0) {
773 		disable_irq(lan966x->ana_irq);
774 		lan966x->ana_irq = -ENXIO;
775 	}
776 
777 	if (lan966x->fdma)
778 		devm_free_irq(lan966x->dev, lan966x->fdma_irq, lan966x);
779 
780 	if (lan966x->ptp_irq > 0)
781 		devm_free_irq(lan966x->dev, lan966x->ptp_irq, lan966x);
782 
783 	if (lan966x->ptp_ext_irq > 0)
784 		devm_free_irq(lan966x->dev, lan966x->ptp_ext_irq, lan966x);
785 }
786 
787 static int lan966x_probe_port(struct lan966x *lan966x, u32 p,
788 			      phy_interface_t phy_mode,
789 			      struct fwnode_handle *portnp)
790 {
791 	struct lan966x_port *port;
792 	struct phylink *phylink;
793 	struct net_device *dev;
794 	int err;
795 
796 	if (p >= lan966x->num_phys_ports)
797 		return -EINVAL;
798 
799 	dev = devm_alloc_etherdev_mqs(lan966x->dev,
800 				      sizeof(struct lan966x_port),
801 				      NUM_PRIO_QUEUES, 1);
802 	if (!dev)
803 		return -ENOMEM;
804 
805 	SET_NETDEV_DEV(dev, lan966x->dev);
806 	port = netdev_priv(dev);
807 	port->dev = dev;
808 	port->lan966x = lan966x;
809 	port->chip_port = p;
810 	lan966x->ports[p] = port;
811 
812 	dev->max_mtu = ETH_MAX_MTU;
813 
814 	dev->netdev_ops = &lan966x_port_netdev_ops;
815 	dev->ethtool_ops = &lan966x_ethtool_ops;
816 	dev->features |= NETIF_F_HW_VLAN_CTAG_TX |
817 			 NETIF_F_HW_VLAN_STAG_TX |
818 			 NETIF_F_HW_TC;
819 	dev->hw_features |= NETIF_F_HW_TC;
820 	dev->priv_flags |= IFF_SEE_ALL_HWTSTAMP_REQUESTS;
821 	dev->needed_headroom = IFH_LEN_BYTES;
822 
823 	eth_hw_addr_gen(dev, lan966x->base_mac, p + 1);
824 
825 	lan966x_mac_learn(lan966x, PGID_CPU, dev->dev_addr, HOST_PVID,
826 			  ENTRYTYPE_LOCKED);
827 
828 	port->phylink_config.dev = &port->dev->dev;
829 	port->phylink_config.type = PHYLINK_NETDEV;
830 	port->phylink_pcs.poll = true;
831 	port->phylink_pcs.ops = &lan966x_phylink_pcs_ops;
832 	port->phylink_pcs.neg_mode = true;
833 
834 	port->phylink_config.mac_capabilities = MAC_ASYM_PAUSE | MAC_SYM_PAUSE |
835 		MAC_10 | MAC_100 | MAC_1000FD | MAC_2500FD;
836 
837 	phy_interface_set_rgmii(port->phylink_config.supported_interfaces);
838 	__set_bit(PHY_INTERFACE_MODE_MII,
839 		  port->phylink_config.supported_interfaces);
840 	__set_bit(PHY_INTERFACE_MODE_GMII,
841 		  port->phylink_config.supported_interfaces);
842 	__set_bit(PHY_INTERFACE_MODE_SGMII,
843 		  port->phylink_config.supported_interfaces);
844 	__set_bit(PHY_INTERFACE_MODE_QSGMII,
845 		  port->phylink_config.supported_interfaces);
846 	__set_bit(PHY_INTERFACE_MODE_QUSGMII,
847 		  port->phylink_config.supported_interfaces);
848 	__set_bit(PHY_INTERFACE_MODE_1000BASEX,
849 		  port->phylink_config.supported_interfaces);
850 	__set_bit(PHY_INTERFACE_MODE_2500BASEX,
851 		  port->phylink_config.supported_interfaces);
852 
853 	phylink = phylink_create(&port->phylink_config,
854 				 portnp,
855 				 phy_mode,
856 				 &lan966x_phylink_mac_ops);
857 	if (IS_ERR(phylink)) {
858 		port->dev = NULL;
859 		return PTR_ERR(phylink);
860 	}
861 
862 	port->phylink = phylink;
863 
864 	if (lan966x->fdma)
865 		dev->xdp_features = NETDEV_XDP_ACT_BASIC |
866 				    NETDEV_XDP_ACT_REDIRECT |
867 				    NETDEV_XDP_ACT_NDO_XMIT;
868 
869 	err = register_netdev(dev);
870 	if (err) {
871 		dev_err(lan966x->dev, "register_netdev failed\n");
872 		return err;
873 	}
874 
875 	lan966x_vlan_port_set_vlan_aware(port, 0);
876 	lan966x_vlan_port_set_vid(port, HOST_PVID, false, false);
877 	lan966x_vlan_port_apply(port);
878 
879 	return 0;
880 }
881 
882 static void lan966x_init(struct lan966x *lan966x)
883 {
884 	u32 p, i;
885 
886 	/* MAC table initialization */
887 	lan966x_mac_init(lan966x);
888 
889 	lan966x_vlan_init(lan966x);
890 
891 	/* Flush queues */
892 	lan_wr(lan_rd(lan966x, QS_XTR_FLUSH) |
893 	       GENMASK(1, 0),
894 	       lan966x, QS_XTR_FLUSH);
895 
896 	/* Allow to drain */
897 	mdelay(1);
898 
899 	/* All Queues normal */
900 	lan_wr(lan_rd(lan966x, QS_XTR_FLUSH) &
901 	       ~(GENMASK(1, 0)),
902 	       lan966x, QS_XTR_FLUSH);
903 
904 	/* Set MAC age time to default value, the entry is aged after
905 	 * 2 * AGE_PERIOD
906 	 */
907 	lan_wr(ANA_AUTOAGE_AGE_PERIOD_SET(BR_DEFAULT_AGEING_TIME / 2 / HZ),
908 	       lan966x, ANA_AUTOAGE);
909 
910 	/* Disable learning for frames discarded by VLAN ingress filtering */
911 	lan_rmw(ANA_ADVLEARN_VLAN_CHK_SET(1),
912 		ANA_ADVLEARN_VLAN_CHK,
913 		lan966x, ANA_ADVLEARN);
914 
915 	/* Setup frame ageing - "2 sec" - The unit is 6.5 us on lan966x */
916 	lan_wr(SYS_FRM_AGING_AGE_TX_ENA_SET(1) |
917 	       (20000000 / 65),
918 	       lan966x,  SYS_FRM_AGING);
919 
920 	/* Map the 8 CPU extraction queues to CPU port */
921 	lan_wr(0, lan966x, QSYS_CPU_GROUP_MAP);
922 
923 	/* Do byte-swap and expect status after last data word
924 	 * Extraction: Mode: manual extraction) | Byte_swap
925 	 */
926 	lan_wr(QS_XTR_GRP_CFG_MODE_SET(lan966x->fdma ? 2 : 1) |
927 	       QS_XTR_GRP_CFG_BYTE_SWAP_SET(1),
928 	       lan966x, QS_XTR_GRP_CFG(0));
929 
930 	/* Injection: Mode: manual injection | Byte_swap */
931 	lan_wr(QS_INJ_GRP_CFG_MODE_SET(lan966x->fdma ? 2 : 1) |
932 	       QS_INJ_GRP_CFG_BYTE_SWAP_SET(1),
933 	       lan966x, QS_INJ_GRP_CFG(0));
934 
935 	lan_rmw(QS_INJ_CTRL_GAP_SIZE_SET(0),
936 		QS_INJ_CTRL_GAP_SIZE,
937 		lan966x, QS_INJ_CTRL(0));
938 
939 	/* Enable IFH insertion/parsing on CPU ports */
940 	lan_wr(SYS_PORT_MODE_INCL_INJ_HDR_SET(1) |
941 	       SYS_PORT_MODE_INCL_XTR_HDR_SET(1),
942 	       lan966x, SYS_PORT_MODE(CPU_PORT));
943 
944 	/* Setup flooding PGIDs */
945 	lan_wr(ANA_FLOODING_IPMC_FLD_MC4_DATA_SET(PGID_MCIPV4) |
946 	       ANA_FLOODING_IPMC_FLD_MC4_CTRL_SET(PGID_MC) |
947 	       ANA_FLOODING_IPMC_FLD_MC6_DATA_SET(PGID_MCIPV6) |
948 	       ANA_FLOODING_IPMC_FLD_MC6_CTRL_SET(PGID_MC),
949 	       lan966x, ANA_FLOODING_IPMC);
950 
951 	/* There are 8 priorities */
952 	for (i = 0; i < 8; ++i)
953 		lan_rmw(ANA_FLOODING_FLD_MULTICAST_SET(PGID_MC) |
954 			ANA_FLOODING_FLD_UNICAST_SET(PGID_UC) |
955 			ANA_FLOODING_FLD_BROADCAST_SET(PGID_BC),
956 			ANA_FLOODING_FLD_MULTICAST |
957 			ANA_FLOODING_FLD_UNICAST |
958 			ANA_FLOODING_FLD_BROADCAST,
959 			lan966x, ANA_FLOODING(i));
960 
961 	for (i = 0; i < PGID_ENTRIES; ++i)
962 		/* Set all the entries to obey VLAN_VLAN */
963 		lan_rmw(ANA_PGID_CFG_OBEY_VLAN_SET(1),
964 			ANA_PGID_CFG_OBEY_VLAN,
965 			lan966x, ANA_PGID_CFG(i));
966 
967 	for (p = 0; p < lan966x->num_phys_ports; p++) {
968 		/* Disable bridging by default */
969 		lan_rmw(ANA_PGID_PGID_SET(0x0),
970 			ANA_PGID_PGID,
971 			lan966x, ANA_PGID(p + PGID_SRC));
972 
973 		/* Do not forward BPDU frames to the front ports and copy them
974 		 * to CPU
975 		 */
976 		lan_wr(0xffff, lan966x, ANA_CPU_FWD_BPDU_CFG(p));
977 	}
978 
979 	/* Set source buffer size for each priority and each port to 1500 bytes */
980 	for (i = 0; i <= QSYS_Q_RSRV; ++i) {
981 		lan_wr(1500 / 64, lan966x, QSYS_RES_CFG(i));
982 		lan_wr(1500 / 64, lan966x, QSYS_RES_CFG(512 + i));
983 	}
984 
985 	/* Enable switching to/from cpu port */
986 	lan_wr(QSYS_SW_PORT_MODE_PORT_ENA_SET(1) |
987 	       QSYS_SW_PORT_MODE_SCH_NEXT_CFG_SET(1) |
988 	       QSYS_SW_PORT_MODE_INGRESS_DROP_MODE_SET(1),
989 	       lan966x,  QSYS_SW_PORT_MODE(CPU_PORT));
990 
991 	/* Configure and enable the CPU port */
992 	lan_rmw(ANA_PGID_PGID_SET(0),
993 		ANA_PGID_PGID,
994 		lan966x, ANA_PGID(CPU_PORT));
995 	lan_rmw(ANA_PGID_PGID_SET(BIT(CPU_PORT)),
996 		ANA_PGID_PGID,
997 		lan966x, ANA_PGID(PGID_CPU));
998 
999 	/* Multicast to all other ports */
1000 	lan_rmw(GENMASK(lan966x->num_phys_ports - 1, 0),
1001 		ANA_PGID_PGID,
1002 		lan966x, ANA_PGID(PGID_MC));
1003 
1004 	/* This will be controlled by mrouter ports */
1005 	lan_rmw(GENMASK(lan966x->num_phys_ports - 1, 0),
1006 		ANA_PGID_PGID,
1007 		lan966x, ANA_PGID(PGID_MCIPV4));
1008 
1009 	lan_rmw(GENMASK(lan966x->num_phys_ports - 1, 0),
1010 		ANA_PGID_PGID,
1011 		lan966x, ANA_PGID(PGID_MCIPV6));
1012 
1013 	/* Unicast to all other ports */
1014 	lan_rmw(GENMASK(lan966x->num_phys_ports - 1, 0),
1015 		ANA_PGID_PGID,
1016 		lan966x, ANA_PGID(PGID_UC));
1017 
1018 	/* Broadcast to the CPU port and to other ports */
1019 	lan_rmw(ANA_PGID_PGID_SET(BIT(CPU_PORT) | GENMASK(lan966x->num_phys_ports - 1, 0)),
1020 		ANA_PGID_PGID,
1021 		lan966x, ANA_PGID(PGID_BC));
1022 
1023 	lan_wr(REW_PORT_CFG_NO_REWRITE_SET(1),
1024 	       lan966x, REW_PORT_CFG(CPU_PORT));
1025 
1026 	lan_rmw(ANA_ANAINTR_INTR_ENA_SET(1),
1027 		ANA_ANAINTR_INTR_ENA,
1028 		lan966x, ANA_ANAINTR);
1029 
1030 	spin_lock_init(&lan966x->tx_lock);
1031 
1032 	lan966x_taprio_init(lan966x);
1033 }
1034 
1035 static int lan966x_ram_init(struct lan966x *lan966x)
1036 {
1037 	return lan_rd(lan966x, SYS_RAM_INIT);
1038 }
1039 
1040 static int lan966x_reset_switch(struct lan966x *lan966x)
1041 {
1042 	struct reset_control *switch_reset;
1043 	int val = 0;
1044 	int ret;
1045 
1046 	switch_reset = devm_reset_control_get_optional_shared(lan966x->dev,
1047 							      "switch");
1048 	if (IS_ERR(switch_reset))
1049 		return dev_err_probe(lan966x->dev, PTR_ERR(switch_reset),
1050 				     "Could not obtain switch reset");
1051 
1052 	reset_control_reset(switch_reset);
1053 
1054 	/* Don't reinitialize the switch core, if it is already initialized. In
1055 	 * case it is initialized twice, some pointers inside the queue system
1056 	 * in HW will get corrupted and then after a while the queue system gets
1057 	 * full and no traffic is passing through the switch. The issue is seen
1058 	 * when loading and unloading the driver and sending traffic through the
1059 	 * switch.
1060 	 */
1061 	if (lan_rd(lan966x, SYS_RESET_CFG) & SYS_RESET_CFG_CORE_ENA)
1062 		return 0;
1063 
1064 	lan_wr(SYS_RESET_CFG_CORE_ENA_SET(0), lan966x, SYS_RESET_CFG);
1065 	lan_wr(SYS_RAM_INIT_RAM_INIT_SET(1), lan966x, SYS_RAM_INIT);
1066 	ret = readx_poll_timeout(lan966x_ram_init, lan966x,
1067 				 val, (val & BIT(1)) == 0, READL_SLEEP_US,
1068 				 READL_TIMEOUT_US);
1069 	if (ret)
1070 		return ret;
1071 
1072 	lan_wr(SYS_RESET_CFG_CORE_ENA_SET(1), lan966x, SYS_RESET_CFG);
1073 
1074 	return 0;
1075 }
1076 
1077 static int lan966x_probe(struct platform_device *pdev)
1078 {
1079 	struct fwnode_handle *ports, *portnp;
1080 	struct lan966x *lan966x;
1081 	u8 mac_addr[ETH_ALEN];
1082 	int err;
1083 
1084 	lan966x = devm_kzalloc(&pdev->dev, sizeof(*lan966x), GFP_KERNEL);
1085 	if (!lan966x)
1086 		return -ENOMEM;
1087 
1088 	platform_set_drvdata(pdev, lan966x);
1089 	lan966x->dev = &pdev->dev;
1090 
1091 	lan966x->debugfs_root = debugfs_create_dir("lan966x", NULL);
1092 
1093 	if (!device_get_mac_address(&pdev->dev, mac_addr)) {
1094 		ether_addr_copy(lan966x->base_mac, mac_addr);
1095 	} else {
1096 		pr_info("MAC addr was not set, use random MAC\n");
1097 		eth_random_addr(lan966x->base_mac);
1098 		lan966x->base_mac[5] &= 0xf0;
1099 	}
1100 
1101 	err = lan966x_create_targets(pdev, lan966x);
1102 	if (err)
1103 		return dev_err_probe(&pdev->dev, err,
1104 				     "Failed to create targets");
1105 
1106 	err = lan966x_reset_switch(lan966x);
1107 	if (err)
1108 		return dev_err_probe(&pdev->dev, err, "Reset failed");
1109 
1110 	lan966x->num_phys_ports = NUM_PHYS_PORTS;
1111 	lan966x->ports = devm_kcalloc(&pdev->dev, lan966x->num_phys_ports,
1112 				      sizeof(struct lan966x_port *),
1113 				      GFP_KERNEL);
1114 	if (!lan966x->ports)
1115 		return -ENOMEM;
1116 
1117 	/* There QS system has 32KB of memory */
1118 	lan966x->shared_queue_sz = LAN966X_BUFFER_MEMORY;
1119 
1120 	/* set irq */
1121 	lan966x->xtr_irq = platform_get_irq_byname(pdev, "xtr");
1122 	if (lan966x->xtr_irq < 0)
1123 		return lan966x->xtr_irq;
1124 
1125 	err = devm_request_threaded_irq(&pdev->dev, lan966x->xtr_irq, NULL,
1126 					lan966x_xtr_irq_handler, IRQF_ONESHOT,
1127 					"frame extraction", lan966x);
1128 	if (err) {
1129 		pr_err("Unable to use xtr irq");
1130 		return -ENODEV;
1131 	}
1132 
1133 	lan966x->ana_irq = platform_get_irq_byname(pdev, "ana");
1134 	if (lan966x->ana_irq > 0) {
1135 		err = devm_request_threaded_irq(&pdev->dev, lan966x->ana_irq, NULL,
1136 						lan966x_ana_irq_handler, IRQF_ONESHOT,
1137 						"ana irq", lan966x);
1138 		if (err)
1139 			return dev_err_probe(&pdev->dev, err, "Unable to use ana irq");
1140 	}
1141 
1142 	lan966x->ptp_irq = platform_get_irq_byname(pdev, "ptp");
1143 	if (lan966x->ptp_irq > 0) {
1144 		err = devm_request_threaded_irq(&pdev->dev, lan966x->ptp_irq, NULL,
1145 						lan966x_ptp_irq_handler, IRQF_ONESHOT,
1146 						"ptp irq", lan966x);
1147 		if (err)
1148 			return dev_err_probe(&pdev->dev, err, "Unable to use ptp irq");
1149 
1150 		lan966x->ptp = 1;
1151 	}
1152 
1153 	lan966x->fdma_irq = platform_get_irq_byname(pdev, "fdma");
1154 	if (lan966x->fdma_irq > 0) {
1155 		err = devm_request_irq(&pdev->dev, lan966x->fdma_irq,
1156 				       lan966x_fdma_irq_handler, 0,
1157 				       "fdma irq", lan966x);
1158 		if (err)
1159 			return dev_err_probe(&pdev->dev, err, "Unable to use fdma irq");
1160 
1161 		lan966x->fdma = true;
1162 	}
1163 
1164 	if (lan966x->ptp) {
1165 		lan966x->ptp_ext_irq = platform_get_irq_byname(pdev, "ptp-ext");
1166 		if (lan966x->ptp_ext_irq > 0) {
1167 			err = devm_request_threaded_irq(&pdev->dev,
1168 							lan966x->ptp_ext_irq, NULL,
1169 							lan966x_ptp_ext_irq_handler,
1170 							IRQF_ONESHOT,
1171 							"ptp-ext irq", lan966x);
1172 			if (err)
1173 				return dev_err_probe(&pdev->dev, err,
1174 						     "Unable to use ptp-ext irq");
1175 		}
1176 	}
1177 
1178 	ports = device_get_named_child_node(&pdev->dev, "ethernet-ports");
1179 	if (!ports)
1180 		return dev_err_probe(&pdev->dev, -ENODEV,
1181 				     "no ethernet-ports child found\n");
1182 
1183 	/* init switch */
1184 	lan966x_init(lan966x);
1185 	lan966x_stats_init(lan966x);
1186 
1187 	/* go over the child nodes */
1188 	fwnode_for_each_available_child_node(ports, portnp) {
1189 		phy_interface_t phy_mode;
1190 		struct phy *serdes;
1191 		u32 p;
1192 
1193 		if (fwnode_property_read_u32(portnp, "reg", &p))
1194 			continue;
1195 
1196 		phy_mode = fwnode_get_phy_mode(portnp);
1197 		err = lan966x_probe_port(lan966x, p, phy_mode, portnp);
1198 		if (err)
1199 			goto cleanup_ports;
1200 
1201 		/* Read needed configuration */
1202 		lan966x->ports[p]->config.portmode = phy_mode;
1203 		lan966x->ports[p]->fwnode = fwnode_handle_get(portnp);
1204 
1205 		serdes = devm_of_phy_optional_get(lan966x->dev,
1206 						  to_of_node(portnp), NULL);
1207 		if (IS_ERR(serdes)) {
1208 			err = PTR_ERR(serdes);
1209 			goto cleanup_ports;
1210 		}
1211 		lan966x->ports[p]->serdes = serdes;
1212 
1213 		lan966x_port_init(lan966x->ports[p]);
1214 		err = lan966x_xdp_port_init(lan966x->ports[p]);
1215 		if (err)
1216 			goto cleanup_ports;
1217 	}
1218 
1219 	fwnode_handle_put(ports);
1220 
1221 	lan966x_mdb_init(lan966x);
1222 	err = lan966x_fdb_init(lan966x);
1223 	if (err)
1224 		goto cleanup_ports;
1225 
1226 	err = lan966x_ptp_init(lan966x);
1227 	if (err)
1228 		goto cleanup_fdb;
1229 
1230 	err = lan966x_fdma_init(lan966x);
1231 	if (err)
1232 		goto cleanup_ptp;
1233 
1234 	err = lan966x_vcap_init(lan966x);
1235 	if (err)
1236 		goto cleanup_fdma;
1237 
1238 	lan966x_dcb_init(lan966x);
1239 
1240 	return 0;
1241 
1242 cleanup_fdma:
1243 	lan966x_fdma_deinit(lan966x);
1244 
1245 cleanup_ptp:
1246 	lan966x_ptp_deinit(lan966x);
1247 
1248 cleanup_fdb:
1249 	lan966x_fdb_deinit(lan966x);
1250 
1251 cleanup_ports:
1252 	fwnode_handle_put(ports);
1253 	fwnode_handle_put(portnp);
1254 
1255 	lan966x_cleanup_ports(lan966x);
1256 
1257 	cancel_delayed_work_sync(&lan966x->stats_work);
1258 	destroy_workqueue(lan966x->stats_queue);
1259 	mutex_destroy(&lan966x->stats_lock);
1260 
1261 	return err;
1262 }
1263 
1264 static int lan966x_remove(struct platform_device *pdev)
1265 {
1266 	struct lan966x *lan966x = platform_get_drvdata(pdev);
1267 
1268 	lan966x_taprio_deinit(lan966x);
1269 	lan966x_vcap_deinit(lan966x);
1270 	lan966x_fdma_deinit(lan966x);
1271 	lan966x_cleanup_ports(lan966x);
1272 
1273 	cancel_delayed_work_sync(&lan966x->stats_work);
1274 	destroy_workqueue(lan966x->stats_queue);
1275 	mutex_destroy(&lan966x->stats_lock);
1276 
1277 	lan966x_mac_purge_entries(lan966x);
1278 	lan966x_mdb_deinit(lan966x);
1279 	lan966x_fdb_deinit(lan966x);
1280 	lan966x_ptp_deinit(lan966x);
1281 
1282 	debugfs_remove_recursive(lan966x->debugfs_root);
1283 
1284 	return 0;
1285 }
1286 
1287 static struct platform_driver lan966x_driver = {
1288 	.probe = lan966x_probe,
1289 	.remove = lan966x_remove,
1290 	.driver = {
1291 		.name = "lan966x-switch",
1292 		.of_match_table = lan966x_match,
1293 	},
1294 };
1295 
1296 static int __init lan966x_switch_driver_init(void)
1297 {
1298 	int ret;
1299 
1300 	lan966x_register_notifier_blocks();
1301 
1302 	ret = platform_driver_register(&lan966x_driver);
1303 	if (ret)
1304 		goto err;
1305 
1306 	return 0;
1307 
1308 err:
1309 	lan966x_unregister_notifier_blocks();
1310 	return ret;
1311 }
1312 
1313 static void __exit lan966x_switch_driver_exit(void)
1314 {
1315 	platform_driver_unregister(&lan966x_driver);
1316 	lan966x_unregister_notifier_blocks();
1317 }
1318 
1319 module_init(lan966x_switch_driver_init);
1320 module_exit(lan966x_switch_driver_exit);
1321 
1322 MODULE_DESCRIPTION("Microchip LAN966X switch driver");
1323 MODULE_AUTHOR("Horatiu Vultur <horatiu.vultur@microchip.com>");
1324 MODULE_LICENSE("Dual MIT/GPL");
1325