1 // SPDX-License-Identifier: GPL-2.0
2 /*
3  * Texas Instruments Ethernet Switch Driver
4  *
5  * Copyright (C) 2012 Texas Instruments
6  *
7  */
8 
9 #include <linux/kernel.h>
10 #include <linux/io.h>
11 #include <linux/clk.h>
12 #include <linux/timer.h>
13 #include <linux/module.h>
14 #include <linux/platform_device.h>
15 #include <linux/irqreturn.h>
16 #include <linux/interrupt.h>
17 #include <linux/if_ether.h>
18 #include <linux/etherdevice.h>
19 #include <linux/netdevice.h>
20 #include <linux/net_tstamp.h>
21 #include <linux/phy.h>
22 #include <linux/phy/phy.h>
23 #include <linux/workqueue.h>
24 #include <linux/delay.h>
25 #include <linux/pm_runtime.h>
26 #include <linux/gpio/consumer.h>
27 #include <linux/of.h>
28 #include <linux/of_mdio.h>
29 #include <linux/of_net.h>
30 #include <linux/of_platform.h>
31 #include <linux/if_vlan.h>
32 #include <linux/kmemleak.h>
33 #include <linux/sys_soc.h>
34 #include <net/page_pool/helpers.h>
35 #include <linux/bpf.h>
36 #include <linux/bpf_trace.h>
37 
38 #include <linux/pinctrl/consumer.h>
39 #include <net/pkt_cls.h>
40 
41 #include "cpsw.h"
42 #include "cpsw_ale.h"
43 #include "cpsw_priv.h"
44 #include "cpsw_sl.h"
45 #include "cpts.h"
46 #include "davinci_cpdma.h"
47 
48 #include <net/pkt_sched.h>
49 
50 static int debug_level;
51 module_param(debug_level, int, 0);
52 MODULE_PARM_DESC(debug_level, "cpsw debug level (NETIF_MSG bits)");
53 
54 static int ale_ageout = 10;
55 module_param(ale_ageout, int, 0);
56 MODULE_PARM_DESC(ale_ageout, "cpsw ale ageout interval (seconds)");
57 
58 static int rx_packet_max = CPSW_MAX_PACKET_SIZE;
59 module_param(rx_packet_max, int, 0);
60 MODULE_PARM_DESC(rx_packet_max, "maximum receive packet size (bytes)");
61 
62 static int descs_pool_size = CPSW_CPDMA_DESCS_POOL_SIZE_DEFAULT;
63 module_param(descs_pool_size, int, 0444);
64 MODULE_PARM_DESC(descs_pool_size, "Number of CPDMA CPPI descriptors in pool");
65 
66 #define for_each_slave(priv, func, arg...)				\
67 	do {								\
68 		struct cpsw_slave *slave;				\
69 		struct cpsw_common *cpsw = (priv)->cpsw;		\
70 		int n;							\
71 		if (cpsw->data.dual_emac)				\
72 			(func)((cpsw)->slaves + priv->emac_port, ##arg);\
73 		else							\
74 			for (n = cpsw->data.slaves,			\
75 					slave = cpsw->slaves;		\
76 					n; n--)				\
77 				(func)(slave++, ##arg);			\
78 	} while (0)
79 
cpsw_slave_index_priv(struct cpsw_common * cpsw,struct cpsw_priv * priv)80 static int cpsw_slave_index_priv(struct cpsw_common *cpsw,
81 				 struct cpsw_priv *priv)
82 {
83 	return cpsw->data.dual_emac ? priv->emac_port : cpsw->data.active_slave;
84 }
85 
cpsw_get_slave_port(u32 slave_num)86 static int cpsw_get_slave_port(u32 slave_num)
87 {
88 	return slave_num + 1;
89 }
90 
91 static int cpsw_ndo_vlan_rx_add_vid(struct net_device *ndev,
92 				    __be16 proto, u16 vid);
93 
cpsw_set_promiscious(struct net_device * ndev,bool enable)94 static void cpsw_set_promiscious(struct net_device *ndev, bool enable)
95 {
96 	struct cpsw_common *cpsw = ndev_to_cpsw(ndev);
97 	struct cpsw_ale *ale = cpsw->ale;
98 	int i;
99 
100 	if (cpsw->data.dual_emac) {
101 		bool flag = false;
102 
103 		/* Enabling promiscuous mode for one interface will be
104 		 * common for both the interface as the interface shares
105 		 * the same hardware resource.
106 		 */
107 		for (i = 0; i < cpsw->data.slaves; i++)
108 			if (cpsw->slaves[i].ndev->flags & IFF_PROMISC)
109 				flag = true;
110 
111 		if (!enable && flag) {
112 			enable = true;
113 			dev_err(&ndev->dev, "promiscuity not disabled as the other interface is still in promiscuity mode\n");
114 		}
115 
116 		if (enable) {
117 			/* Enable Bypass */
118 			cpsw_ale_control_set(ale, 0, ALE_BYPASS, 1);
119 
120 			dev_dbg(&ndev->dev, "promiscuity enabled\n");
121 		} else {
122 			/* Disable Bypass */
123 			cpsw_ale_control_set(ale, 0, ALE_BYPASS, 0);
124 			dev_dbg(&ndev->dev, "promiscuity disabled\n");
125 		}
126 	} else {
127 		if (enable) {
128 			unsigned long timeout = jiffies + HZ;
129 
130 			/* Disable Learn for all ports (host is port 0 and slaves are port 1 and up */
131 			for (i = 0; i <= cpsw->data.slaves; i++) {
132 				cpsw_ale_control_set(ale, i,
133 						     ALE_PORT_NOLEARN, 1);
134 				cpsw_ale_control_set(ale, i,
135 						     ALE_PORT_NO_SA_UPDATE, 1);
136 			}
137 
138 			/* Clear All Untouched entries */
139 			cpsw_ale_control_set(ale, 0, ALE_AGEOUT, 1);
140 			do {
141 				cpu_relax();
142 				if (cpsw_ale_control_get(ale, 0, ALE_AGEOUT))
143 					break;
144 			} while (time_after(timeout, jiffies));
145 			cpsw_ale_control_set(ale, 0, ALE_AGEOUT, 1);
146 
147 			/* Clear all mcast from ALE */
148 			cpsw_ale_flush_multicast(ale, ALE_ALL_PORTS, -1);
149 			__hw_addr_ref_unsync_dev(&ndev->mc, ndev, NULL);
150 
151 			/* Flood All Unicast Packets to Host port */
152 			cpsw_ale_control_set(ale, 0, ALE_P0_UNI_FLOOD, 1);
153 			dev_dbg(&ndev->dev, "promiscuity enabled\n");
154 		} else {
155 			/* Don't Flood All Unicast Packets to Host port */
156 			cpsw_ale_control_set(ale, 0, ALE_P0_UNI_FLOOD, 0);
157 
158 			/* Enable Learn for all ports (host is port 0 and slaves are port 1 and up */
159 			for (i = 0; i <= cpsw->data.slaves; i++) {
160 				cpsw_ale_control_set(ale, i,
161 						     ALE_PORT_NOLEARN, 0);
162 				cpsw_ale_control_set(ale, i,
163 						     ALE_PORT_NO_SA_UPDATE, 0);
164 			}
165 			dev_dbg(&ndev->dev, "promiscuity disabled\n");
166 		}
167 	}
168 }
169 
170 /**
171  * cpsw_set_mc - adds multicast entry to the table if it's not added or deletes
172  * if it's not deleted
173  * @ndev: device to sync
174  * @addr: address to be added or deleted
175  * @vid: vlan id, if vid < 0 set/unset address for real device
176  * @add: add address if the flag is set or remove otherwise
177  */
cpsw_set_mc(struct net_device * ndev,const u8 * addr,int vid,int add)178 static int cpsw_set_mc(struct net_device *ndev, const u8 *addr,
179 		       int vid, int add)
180 {
181 	struct cpsw_priv *priv = netdev_priv(ndev);
182 	struct cpsw_common *cpsw = priv->cpsw;
183 	int mask, flags, ret;
184 
185 	if (vid < 0) {
186 		if (cpsw->data.dual_emac)
187 			vid = cpsw->slaves[priv->emac_port].port_vlan;
188 		else
189 			vid = 0;
190 	}
191 
192 	mask = cpsw->data.dual_emac ? ALE_PORT_HOST : ALE_ALL_PORTS;
193 	flags = vid ? ALE_VLAN : 0;
194 
195 	if (add)
196 		ret = cpsw_ale_add_mcast(cpsw->ale, addr, mask, flags, vid, 0);
197 	else
198 		ret = cpsw_ale_del_mcast(cpsw->ale, addr, 0, flags, vid);
199 
200 	return ret;
201 }
202 
cpsw_update_vlan_mc(struct net_device * vdev,int vid,void * ctx)203 static int cpsw_update_vlan_mc(struct net_device *vdev, int vid, void *ctx)
204 {
205 	struct addr_sync_ctx *sync_ctx = ctx;
206 	struct netdev_hw_addr *ha;
207 	int found = 0, ret = 0;
208 
209 	if (!vdev || !(vdev->flags & IFF_UP))
210 		return 0;
211 
212 	/* vlan address is relevant if its sync_cnt != 0 */
213 	netdev_for_each_mc_addr(ha, vdev) {
214 		if (ether_addr_equal(ha->addr, sync_ctx->addr)) {
215 			found = ha->sync_cnt;
216 			break;
217 		}
218 	}
219 
220 	if (found)
221 		sync_ctx->consumed++;
222 
223 	if (sync_ctx->flush) {
224 		if (!found)
225 			cpsw_set_mc(sync_ctx->ndev, sync_ctx->addr, vid, 0);
226 		return 0;
227 	}
228 
229 	if (found)
230 		ret = cpsw_set_mc(sync_ctx->ndev, sync_ctx->addr, vid, 1);
231 
232 	return ret;
233 }
234 
cpsw_add_mc_addr(struct net_device * ndev,const u8 * addr,int num)235 static int cpsw_add_mc_addr(struct net_device *ndev, const u8 *addr, int num)
236 {
237 	struct addr_sync_ctx sync_ctx;
238 	int ret;
239 
240 	sync_ctx.consumed = 0;
241 	sync_ctx.addr = addr;
242 	sync_ctx.ndev = ndev;
243 	sync_ctx.flush = 0;
244 
245 	ret = vlan_for_each(ndev, cpsw_update_vlan_mc, &sync_ctx);
246 	if (sync_ctx.consumed < num && !ret)
247 		ret = cpsw_set_mc(ndev, addr, -1, 1);
248 
249 	return ret;
250 }
251 
cpsw_del_mc_addr(struct net_device * ndev,const u8 * addr,int num)252 static int cpsw_del_mc_addr(struct net_device *ndev, const u8 *addr, int num)
253 {
254 	struct addr_sync_ctx sync_ctx;
255 
256 	sync_ctx.consumed = 0;
257 	sync_ctx.addr = addr;
258 	sync_ctx.ndev = ndev;
259 	sync_ctx.flush = 1;
260 
261 	vlan_for_each(ndev, cpsw_update_vlan_mc, &sync_ctx);
262 	if (sync_ctx.consumed == num)
263 		cpsw_set_mc(ndev, addr, -1, 0);
264 
265 	return 0;
266 }
267 
cpsw_purge_vlan_mc(struct net_device * vdev,int vid,void * ctx)268 static int cpsw_purge_vlan_mc(struct net_device *vdev, int vid, void *ctx)
269 {
270 	struct addr_sync_ctx *sync_ctx = ctx;
271 	struct netdev_hw_addr *ha;
272 	int found = 0;
273 
274 	if (!vdev || !(vdev->flags & IFF_UP))
275 		return 0;
276 
277 	/* vlan address is relevant if its sync_cnt != 0 */
278 	netdev_for_each_mc_addr(ha, vdev) {
279 		if (ether_addr_equal(ha->addr, sync_ctx->addr)) {
280 			found = ha->sync_cnt;
281 			break;
282 		}
283 	}
284 
285 	if (!found)
286 		return 0;
287 
288 	sync_ctx->consumed++;
289 	cpsw_set_mc(sync_ctx->ndev, sync_ctx->addr, vid, 0);
290 	return 0;
291 }
292 
cpsw_purge_all_mc(struct net_device * ndev,const u8 * addr,int num)293 static int cpsw_purge_all_mc(struct net_device *ndev, const u8 *addr, int num)
294 {
295 	struct addr_sync_ctx sync_ctx;
296 
297 	sync_ctx.addr = addr;
298 	sync_ctx.ndev = ndev;
299 	sync_ctx.consumed = 0;
300 
301 	vlan_for_each(ndev, cpsw_purge_vlan_mc, &sync_ctx);
302 	if (sync_ctx.consumed < num)
303 		cpsw_set_mc(ndev, addr, -1, 0);
304 
305 	return 0;
306 }
307 
cpsw_ndo_set_rx_mode(struct net_device * ndev)308 static void cpsw_ndo_set_rx_mode(struct net_device *ndev)
309 {
310 	struct cpsw_priv *priv = netdev_priv(ndev);
311 	struct cpsw_common *cpsw = priv->cpsw;
312 	int slave_port = -1;
313 
314 	if (cpsw->data.dual_emac)
315 		slave_port = priv->emac_port + 1;
316 
317 	if (ndev->flags & IFF_PROMISC) {
318 		/* Enable promiscuous mode */
319 		cpsw_set_promiscious(ndev, true);
320 		cpsw_ale_set_allmulti(cpsw->ale, IFF_ALLMULTI, slave_port);
321 		return;
322 	} else {
323 		/* Disable promiscuous mode */
324 		cpsw_set_promiscious(ndev, false);
325 	}
326 
327 	/* Restore allmulti on vlans if necessary */
328 	cpsw_ale_set_allmulti(cpsw->ale,
329 			      ndev->flags & IFF_ALLMULTI, slave_port);
330 
331 	/* add/remove mcast address either for real netdev or for vlan */
332 	__hw_addr_ref_sync_dev(&ndev->mc, ndev, cpsw_add_mc_addr,
333 			       cpsw_del_mc_addr);
334 }
335 
cpsw_rxbuf_total_len(unsigned int len)336 static unsigned int cpsw_rxbuf_total_len(unsigned int len)
337 {
338 	len += CPSW_HEADROOM_NA;
339 	len += SKB_DATA_ALIGN(sizeof(struct skb_shared_info));
340 
341 	return SKB_DATA_ALIGN(len);
342 }
343 
cpsw_rx_handler(void * token,int len,int status)344 static void cpsw_rx_handler(void *token, int len, int status)
345 {
346 	struct page		*new_page, *page = token;
347 	void			*pa = page_address(page);
348 	struct cpsw_meta_xdp	*xmeta = pa + CPSW_XMETA_OFFSET;
349 	struct cpsw_common	*cpsw = ndev_to_cpsw(xmeta->ndev);
350 	int			pkt_size = cpsw->rx_packet_max;
351 	int			ret = 0, port, ch = xmeta->ch;
352 	int			headroom = CPSW_HEADROOM_NA;
353 	struct net_device	*ndev = xmeta->ndev;
354 	u32			metasize = 0;
355 	struct cpsw_priv	*priv;
356 	struct page_pool	*pool;
357 	struct sk_buff		*skb;
358 	struct xdp_buff		xdp;
359 	dma_addr_t		dma;
360 
361 	if (cpsw->data.dual_emac && status >= 0) {
362 		port = CPDMA_RX_SOURCE_PORT(status);
363 		if (port)
364 			ndev = cpsw->slaves[--port].ndev;
365 	}
366 
367 	priv = netdev_priv(ndev);
368 	pool = cpsw->page_pool[ch];
369 	if (unlikely(status < 0) || unlikely(!netif_running(ndev))) {
370 		/* In dual emac mode check for all interfaces */
371 		if (cpsw->data.dual_emac && cpsw->usage_count &&
372 		    (status >= 0)) {
373 			/* The packet received is for the interface which
374 			 * is already down and the other interface is up
375 			 * and running, instead of freeing which results
376 			 * in reducing of the number of rx descriptor in
377 			 * DMA engine, requeue page back to cpdma.
378 			 */
379 			new_page = page;
380 			goto requeue;
381 		}
382 
383 		/* the interface is going down, pages are purged */
384 		page_pool_recycle_direct(pool, page);
385 		return;
386 	}
387 
388 	new_page = page_pool_dev_alloc_pages(pool);
389 	if (unlikely(!new_page)) {
390 		new_page = page;
391 		ndev->stats.rx_dropped++;
392 		goto requeue;
393 	}
394 
395 	if (priv->xdp_prog) {
396 		int size = len;
397 
398 		xdp_init_buff(&xdp, PAGE_SIZE, &priv->xdp_rxq[ch]);
399 		if (status & CPDMA_RX_VLAN_ENCAP) {
400 			headroom += CPSW_RX_VLAN_ENCAP_HDR_SIZE;
401 			size -= CPSW_RX_VLAN_ENCAP_HDR_SIZE;
402 		}
403 
404 		xdp_prepare_buff(&xdp, pa, headroom, size, true);
405 
406 		port = priv->emac_port + cpsw->data.dual_emac;
407 		ret = cpsw_run_xdp(priv, ch, &xdp, page, port, &len);
408 		if (ret != CPSW_XDP_PASS)
409 			goto requeue;
410 
411 		headroom = xdp.data - xdp.data_hard_start;
412 		metasize = xdp.data - xdp.data_meta;
413 
414 		/* XDP prog can modify vlan tag, so can't use encap header */
415 		status &= ~CPDMA_RX_VLAN_ENCAP;
416 	}
417 
418 	/* pass skb to netstack if no XDP prog or returned XDP_PASS */
419 	skb = build_skb(pa, cpsw_rxbuf_total_len(pkt_size));
420 	if (!skb) {
421 		ndev->stats.rx_dropped++;
422 		page_pool_recycle_direct(pool, page);
423 		goto requeue;
424 	}
425 
426 	skb_reserve(skb, headroom);
427 	skb_put(skb, len);
428 	if (metasize)
429 		skb_metadata_set(skb, metasize);
430 	skb->dev = ndev;
431 	if (status & CPDMA_RX_VLAN_ENCAP)
432 		cpsw_rx_vlan_encap(skb);
433 	if (priv->rx_ts_enabled)
434 		cpts_rx_timestamp(cpsw->cpts, skb);
435 	skb->protocol = eth_type_trans(skb, ndev);
436 
437 	/* mark skb for recycling */
438 	skb_mark_for_recycle(skb);
439 	netif_receive_skb(skb);
440 
441 	ndev->stats.rx_bytes += len;
442 	ndev->stats.rx_packets++;
443 
444 requeue:
445 	xmeta = page_address(new_page) + CPSW_XMETA_OFFSET;
446 	xmeta->ndev = ndev;
447 	xmeta->ch = ch;
448 
449 	dma = page_pool_get_dma_addr(new_page) + CPSW_HEADROOM_NA;
450 	ret = cpdma_chan_submit_mapped(cpsw->rxv[ch].ch, new_page, dma,
451 				       pkt_size, 0);
452 	if (ret < 0) {
453 		WARN_ON(ret == -ENOMEM);
454 		page_pool_recycle_direct(pool, new_page);
455 	}
456 }
457 
_cpsw_adjust_link(struct cpsw_slave * slave,struct cpsw_priv * priv,bool * link)458 static void _cpsw_adjust_link(struct cpsw_slave *slave,
459 			      struct cpsw_priv *priv, bool *link)
460 {
461 	struct phy_device	*phy = slave->phy;
462 	u32			mac_control = 0;
463 	u32			slave_port;
464 	struct cpsw_common *cpsw = priv->cpsw;
465 
466 	if (!phy)
467 		return;
468 
469 	slave_port = cpsw_get_slave_port(slave->slave_num);
470 
471 	if (phy->link) {
472 		mac_control = CPSW_SL_CTL_GMII_EN;
473 
474 		if (phy->speed == 1000)
475 			mac_control |= CPSW_SL_CTL_GIG;
476 		if (phy->duplex)
477 			mac_control |= CPSW_SL_CTL_FULLDUPLEX;
478 
479 		/* set speed_in input in case RMII mode is used in 100Mbps */
480 		if (phy->speed == 100)
481 			mac_control |= CPSW_SL_CTL_IFCTL_A;
482 		/* in band mode only works in 10Mbps RGMII mode */
483 		else if ((phy->speed == 10) && phy_interface_is_rgmii(phy))
484 			mac_control |= CPSW_SL_CTL_EXT_EN; /* In Band mode */
485 
486 		if (priv->rx_pause)
487 			mac_control |= CPSW_SL_CTL_RX_FLOW_EN;
488 
489 		if (priv->tx_pause)
490 			mac_control |= CPSW_SL_CTL_TX_FLOW_EN;
491 
492 		if (mac_control != slave->mac_control)
493 			cpsw_sl_ctl_set(slave->mac_sl, mac_control);
494 
495 		/* enable forwarding */
496 		cpsw_ale_control_set(cpsw->ale, slave_port,
497 				     ALE_PORT_STATE, ALE_PORT_STATE_FORWARD);
498 
499 		*link = true;
500 
501 		if (priv->shp_cfg_speed &&
502 		    priv->shp_cfg_speed != slave->phy->speed &&
503 		    !cpsw_shp_is_off(priv))
504 			dev_warn(priv->dev,
505 				 "Speed was changed, CBS shaper speeds are changed!");
506 	} else {
507 		mac_control = 0;
508 		/* disable forwarding */
509 		cpsw_ale_control_set(cpsw->ale, slave_port,
510 				     ALE_PORT_STATE, ALE_PORT_STATE_DISABLE);
511 
512 		cpsw_sl_wait_for_idle(slave->mac_sl, 100);
513 
514 		cpsw_sl_ctl_reset(slave->mac_sl);
515 	}
516 
517 	if (mac_control != slave->mac_control)
518 		phy_print_status(phy);
519 
520 	slave->mac_control = mac_control;
521 }
522 
cpsw_adjust_link(struct net_device * ndev)523 static void cpsw_adjust_link(struct net_device *ndev)
524 {
525 	struct cpsw_priv	*priv = netdev_priv(ndev);
526 	struct cpsw_common	*cpsw = priv->cpsw;
527 	bool			link = false;
528 
529 	for_each_slave(priv, _cpsw_adjust_link, priv, &link);
530 
531 	if (link) {
532 		if (cpsw_need_resplit(cpsw))
533 			cpsw_split_res(cpsw);
534 
535 		netif_carrier_on(ndev);
536 		if (netif_running(ndev))
537 			netif_tx_wake_all_queues(ndev);
538 	} else {
539 		netif_carrier_off(ndev);
540 		netif_tx_stop_all_queues(ndev);
541 	}
542 }
543 
cpsw_add_dual_emac_def_ale_entries(struct cpsw_priv * priv,struct cpsw_slave * slave,u32 slave_port)544 static inline void cpsw_add_dual_emac_def_ale_entries(
545 		struct cpsw_priv *priv, struct cpsw_slave *slave,
546 		u32 slave_port)
547 {
548 	struct cpsw_common *cpsw = priv->cpsw;
549 	u32 port_mask = 1 << slave_port | ALE_PORT_HOST;
550 
551 	if (cpsw->version == CPSW_VERSION_1)
552 		slave_write(slave, slave->port_vlan, CPSW1_PORT_VLAN);
553 	else
554 		slave_write(slave, slave->port_vlan, CPSW2_PORT_VLAN);
555 	cpsw_ale_add_vlan(cpsw->ale, slave->port_vlan, port_mask,
556 			  port_mask, port_mask, 0);
557 	cpsw_ale_add_mcast(cpsw->ale, priv->ndev->broadcast,
558 			   ALE_PORT_HOST, ALE_VLAN, slave->port_vlan, 0);
559 	cpsw_ale_add_ucast(cpsw->ale, priv->mac_addr,
560 			   HOST_PORT_NUM, ALE_VLAN |
561 			   ALE_SECURE, slave->port_vlan);
562 	cpsw_ale_control_set(cpsw->ale, slave_port,
563 			     ALE_PORT_DROP_UNKNOWN_VLAN, 1);
564 }
565 
cpsw_slave_open(struct cpsw_slave * slave,struct cpsw_priv * priv)566 static void cpsw_slave_open(struct cpsw_slave *slave, struct cpsw_priv *priv)
567 {
568 	u32 slave_port;
569 	struct phy_device *phy;
570 	struct cpsw_common *cpsw = priv->cpsw;
571 
572 	cpsw_sl_reset(slave->mac_sl, 100);
573 	cpsw_sl_ctl_reset(slave->mac_sl);
574 
575 	/* setup priority mapping */
576 	cpsw_sl_reg_write(slave->mac_sl, CPSW_SL_RX_PRI_MAP,
577 			  RX_PRIORITY_MAPPING);
578 
579 	switch (cpsw->version) {
580 	case CPSW_VERSION_1:
581 		slave_write(slave, TX_PRIORITY_MAPPING, CPSW1_TX_PRI_MAP);
582 		/* Increase RX FIFO size to 5 for supporting fullduplex
583 		 * flow control mode
584 		 */
585 		slave_write(slave,
586 			    (CPSW_MAX_BLKS_TX << CPSW_MAX_BLKS_TX_SHIFT) |
587 			    CPSW_MAX_BLKS_RX, CPSW1_MAX_BLKS);
588 		break;
589 	case CPSW_VERSION_2:
590 	case CPSW_VERSION_3:
591 	case CPSW_VERSION_4:
592 		slave_write(slave, TX_PRIORITY_MAPPING, CPSW2_TX_PRI_MAP);
593 		/* Increase RX FIFO size to 5 for supporting fullduplex
594 		 * flow control mode
595 		 */
596 		slave_write(slave,
597 			    (CPSW_MAX_BLKS_TX << CPSW_MAX_BLKS_TX_SHIFT) |
598 			    CPSW_MAX_BLKS_RX, CPSW2_MAX_BLKS);
599 		break;
600 	}
601 
602 	/* setup max packet size, and mac address */
603 	cpsw_sl_reg_write(slave->mac_sl, CPSW_SL_RX_MAXLEN,
604 			  cpsw->rx_packet_max);
605 	cpsw_set_slave_mac(slave, priv);
606 
607 	slave->mac_control = 0;	/* no link yet */
608 
609 	slave_port = cpsw_get_slave_port(slave->slave_num);
610 
611 	if (cpsw->data.dual_emac)
612 		cpsw_add_dual_emac_def_ale_entries(priv, slave, slave_port);
613 	else
614 		cpsw_ale_add_mcast(cpsw->ale, priv->ndev->broadcast,
615 				   1 << slave_port, 0, 0, ALE_MCAST_FWD_2);
616 
617 	if (slave->data->phy_node) {
618 		phy = of_phy_connect(priv->ndev, slave->data->phy_node,
619 				 &cpsw_adjust_link, 0, slave->data->phy_if);
620 		if (!phy) {
621 			dev_err(priv->dev, "phy \"%pOF\" not found on slave %d\n",
622 				slave->data->phy_node,
623 				slave->slave_num);
624 			return;
625 		}
626 	} else {
627 		phy = phy_connect(priv->ndev, slave->data->phy_id,
628 				 &cpsw_adjust_link, slave->data->phy_if);
629 		if (IS_ERR(phy)) {
630 			dev_err(priv->dev,
631 				"phy \"%s\" not found on slave %d, err %ld\n",
632 				slave->data->phy_id, slave->slave_num,
633 				PTR_ERR(phy));
634 			return;
635 		}
636 	}
637 
638 	phy->mac_managed_pm = true;
639 
640 	slave->phy = phy;
641 
642 	phy_disable_eee(slave->phy);
643 
644 	phy_attached_info(slave->phy);
645 
646 	phy_start(slave->phy);
647 
648 	/* Configure GMII_SEL register */
649 	if (!IS_ERR(slave->data->ifphy))
650 		phy_set_mode_ext(slave->data->ifphy, PHY_MODE_ETHERNET,
651 				 slave->data->phy_if);
652 	else
653 		cpsw_phy_sel(cpsw->dev, slave->phy->interface,
654 			     slave->slave_num);
655 }
656 
cpsw_add_default_vlan(struct cpsw_priv * priv)657 static inline void cpsw_add_default_vlan(struct cpsw_priv *priv)
658 {
659 	struct cpsw_common *cpsw = priv->cpsw;
660 	const int vlan = cpsw->data.default_vlan;
661 	u32 reg;
662 	int i;
663 	int unreg_mcast_mask;
664 
665 	reg = (cpsw->version == CPSW_VERSION_1) ? CPSW1_PORT_VLAN :
666 	       CPSW2_PORT_VLAN;
667 
668 	writel(vlan, &cpsw->host_port_regs->port_vlan);
669 
670 	for (i = 0; i < cpsw->data.slaves; i++)
671 		slave_write(cpsw->slaves + i, vlan, reg);
672 
673 	if (priv->ndev->flags & IFF_ALLMULTI)
674 		unreg_mcast_mask = ALE_ALL_PORTS;
675 	else
676 		unreg_mcast_mask = ALE_PORT_1 | ALE_PORT_2;
677 
678 	cpsw_ale_add_vlan(cpsw->ale, vlan, ALE_ALL_PORTS,
679 			  ALE_ALL_PORTS, ALE_ALL_PORTS,
680 			  unreg_mcast_mask);
681 }
682 
cpsw_init_host_port(struct cpsw_priv * priv)683 static void cpsw_init_host_port(struct cpsw_priv *priv)
684 {
685 	u32 fifo_mode;
686 	u32 control_reg;
687 	struct cpsw_common *cpsw = priv->cpsw;
688 
689 	/* soft reset the controller and initialize ale */
690 	soft_reset("cpsw", &cpsw->regs->soft_reset);
691 	cpsw_ale_start(cpsw->ale);
692 
693 	/* switch to vlan aware mode */
694 	cpsw_ale_control_set(cpsw->ale, HOST_PORT_NUM, ALE_VLAN_AWARE,
695 			     CPSW_ALE_VLAN_AWARE);
696 	control_reg = readl(&cpsw->regs->control);
697 	control_reg |= CPSW_VLAN_AWARE | CPSW_RX_VLAN_ENCAP;
698 	writel(control_reg, &cpsw->regs->control);
699 	fifo_mode = (cpsw->data.dual_emac) ? CPSW_FIFO_DUAL_MAC_MODE :
700 		     CPSW_FIFO_NORMAL_MODE;
701 	writel(fifo_mode, &cpsw->host_port_regs->tx_in_ctl);
702 
703 	/* setup host port priority mapping */
704 	writel_relaxed(CPDMA_TX_PRIORITY_MAP,
705 		       &cpsw->host_port_regs->cpdma_tx_pri_map);
706 	writel_relaxed(0, &cpsw->host_port_regs->cpdma_rx_chan_map);
707 
708 	cpsw_ale_control_set(cpsw->ale, HOST_PORT_NUM,
709 			     ALE_PORT_STATE, ALE_PORT_STATE_FORWARD);
710 
711 	if (!cpsw->data.dual_emac) {
712 		cpsw_ale_add_ucast(cpsw->ale, priv->mac_addr, HOST_PORT_NUM,
713 				   0, 0);
714 		cpsw_ale_add_mcast(cpsw->ale, priv->ndev->broadcast,
715 				   ALE_PORT_HOST, 0, 0, ALE_MCAST_FWD_2);
716 	}
717 }
718 
cpsw_slave_stop(struct cpsw_slave * slave,struct cpsw_common * cpsw)719 static void cpsw_slave_stop(struct cpsw_slave *slave, struct cpsw_common *cpsw)
720 {
721 	u32 slave_port;
722 
723 	slave_port = cpsw_get_slave_port(slave->slave_num);
724 
725 	if (!slave->phy)
726 		return;
727 	phy_stop(slave->phy);
728 	phy_disconnect(slave->phy);
729 	slave->phy = NULL;
730 	cpsw_ale_control_set(cpsw->ale, slave_port,
731 			     ALE_PORT_STATE, ALE_PORT_STATE_DISABLE);
732 	cpsw_sl_reset(slave->mac_sl, 100);
733 	cpsw_sl_ctl_reset(slave->mac_sl);
734 }
735 
cpsw_restore_vlans(struct net_device * vdev,int vid,void * arg)736 static int cpsw_restore_vlans(struct net_device *vdev, int vid, void *arg)
737 {
738 	struct cpsw_priv *priv = arg;
739 
740 	if (!vdev)
741 		return 0;
742 
743 	cpsw_ndo_vlan_rx_add_vid(priv->ndev, 0, vid);
744 	return 0;
745 }
746 
747 /* restore resources after port reset */
cpsw_restore(struct cpsw_priv * priv)748 static void cpsw_restore(struct cpsw_priv *priv)
749 {
750 	/* restore vlan configurations */
751 	vlan_for_each(priv->ndev, cpsw_restore_vlans, priv);
752 
753 	/* restore MQPRIO offload */
754 	for_each_slave(priv, cpsw_mqprio_resume, priv);
755 
756 	/* restore CBS offload */
757 	for_each_slave(priv, cpsw_cbs_resume, priv);
758 }
759 
cpsw_ndo_open(struct net_device * ndev)760 static int cpsw_ndo_open(struct net_device *ndev)
761 {
762 	struct cpsw_priv *priv = netdev_priv(ndev);
763 	struct cpsw_common *cpsw = priv->cpsw;
764 	int ret;
765 	u32 reg;
766 
767 	ret = pm_runtime_resume_and_get(cpsw->dev);
768 	if (ret < 0)
769 		return ret;
770 
771 	netif_carrier_off(ndev);
772 
773 	/* Notify the stack of the actual queue counts. */
774 	ret = netif_set_real_num_tx_queues(ndev, cpsw->tx_ch_num);
775 	if (ret) {
776 		dev_err(priv->dev, "cannot set real number of tx queues\n");
777 		goto err_cleanup;
778 	}
779 
780 	ret = netif_set_real_num_rx_queues(ndev, cpsw->rx_ch_num);
781 	if (ret) {
782 		dev_err(priv->dev, "cannot set real number of rx queues\n");
783 		goto err_cleanup;
784 	}
785 
786 	reg = cpsw->version;
787 
788 	dev_info(priv->dev, "initializing cpsw version %d.%d (%d)\n",
789 		 CPSW_MAJOR_VERSION(reg), CPSW_MINOR_VERSION(reg),
790 		 CPSW_RTL_VERSION(reg));
791 
792 	/* Initialize host and slave ports */
793 	if (!cpsw->usage_count)
794 		cpsw_init_host_port(priv);
795 	for_each_slave(priv, cpsw_slave_open, priv);
796 
797 	/* Add default VLAN */
798 	if (!cpsw->data.dual_emac)
799 		cpsw_add_default_vlan(priv);
800 	else
801 		cpsw_ale_add_vlan(cpsw->ale, cpsw->data.default_vlan,
802 				  ALE_ALL_PORTS, ALE_ALL_PORTS, 0, 0);
803 
804 	/* initialize shared resources for every ndev */
805 	if (!cpsw->usage_count) {
806 		/* disable priority elevation */
807 		writel_relaxed(0, &cpsw->regs->ptype);
808 
809 		/* enable statistics collection only on all ports */
810 		writel_relaxed(0x7, &cpsw->regs->stat_port_en);
811 
812 		/* Enable internal fifo flow control */
813 		writel(0x7, &cpsw->regs->flow_control);
814 
815 		napi_enable(&cpsw->napi_rx);
816 		napi_enable(&cpsw->napi_tx);
817 
818 		if (cpsw->tx_irq_disabled) {
819 			cpsw->tx_irq_disabled = false;
820 			enable_irq(cpsw->irqs_table[1]);
821 		}
822 
823 		if (cpsw->rx_irq_disabled) {
824 			cpsw->rx_irq_disabled = false;
825 			enable_irq(cpsw->irqs_table[0]);
826 		}
827 
828 		/* create rxqs for both infs in dual mac as they use same pool
829 		 * and must be destroyed together when no users.
830 		 */
831 		ret = cpsw_create_xdp_rxqs(cpsw);
832 		if (ret < 0)
833 			goto err_cleanup;
834 
835 		ret = cpsw_fill_rx_channels(priv);
836 		if (ret < 0)
837 			goto err_cleanup;
838 
839 		if (cpsw->cpts) {
840 			if (cpts_register(cpsw->cpts))
841 				dev_err(priv->dev, "error registering cpts device\n");
842 			else
843 				writel(0x10, &cpsw->wr_regs->misc_en);
844 		}
845 	}
846 
847 	cpsw_restore(priv);
848 
849 	/* Enable Interrupt pacing if configured */
850 	if (cpsw->coal_intvl != 0) {
851 		struct ethtool_coalesce coal;
852 
853 		coal.rx_coalesce_usecs = cpsw->coal_intvl;
854 		cpsw_set_coalesce(ndev, &coal, NULL, NULL);
855 	}
856 
857 	cpdma_ctlr_start(cpsw->dma);
858 	cpsw_intr_enable(cpsw);
859 	cpsw->usage_count++;
860 
861 	return 0;
862 
863 err_cleanup:
864 	if (!cpsw->usage_count) {
865 		napi_disable(&cpsw->napi_rx);
866 		napi_disable(&cpsw->napi_tx);
867 		cpdma_ctlr_stop(cpsw->dma);
868 		cpsw_destroy_xdp_rxqs(cpsw);
869 	}
870 
871 	for_each_slave(priv, cpsw_slave_stop, cpsw);
872 	pm_runtime_put_sync(cpsw->dev);
873 	netif_carrier_off(priv->ndev);
874 	return ret;
875 }
876 
cpsw_ndo_stop(struct net_device * ndev)877 static int cpsw_ndo_stop(struct net_device *ndev)
878 {
879 	struct cpsw_priv *priv = netdev_priv(ndev);
880 	struct cpsw_common *cpsw = priv->cpsw;
881 
882 	cpsw_info(priv, ifdown, "shutting down cpsw device\n");
883 	__hw_addr_ref_unsync_dev(&ndev->mc, ndev, cpsw_purge_all_mc);
884 	netif_tx_stop_all_queues(priv->ndev);
885 	netif_carrier_off(priv->ndev);
886 
887 	if (cpsw->usage_count <= 1) {
888 		napi_disable(&cpsw->napi_rx);
889 		napi_disable(&cpsw->napi_tx);
890 		cpts_unregister(cpsw->cpts);
891 		cpsw_intr_disable(cpsw);
892 		cpdma_ctlr_stop(cpsw->dma);
893 		cpsw_ale_stop(cpsw->ale);
894 		cpsw_destroy_xdp_rxqs(cpsw);
895 	}
896 	for_each_slave(priv, cpsw_slave_stop, cpsw);
897 
898 	if (cpsw_need_resplit(cpsw))
899 		cpsw_split_res(cpsw);
900 
901 	cpsw->usage_count--;
902 	pm_runtime_put_sync(cpsw->dev);
903 	return 0;
904 }
905 
cpsw_ndo_start_xmit(struct sk_buff * skb,struct net_device * ndev)906 static netdev_tx_t cpsw_ndo_start_xmit(struct sk_buff *skb,
907 				       struct net_device *ndev)
908 {
909 	struct cpsw_priv *priv = netdev_priv(ndev);
910 	struct cpsw_common *cpsw = priv->cpsw;
911 	struct cpts *cpts = cpsw->cpts;
912 	struct netdev_queue *txq;
913 	struct cpdma_chan *txch;
914 	int ret, q_idx;
915 
916 	if (skb_put_padto(skb, CPSW_MIN_PACKET_SIZE)) {
917 		cpsw_err(priv, tx_err, "packet pad failed\n");
918 		ndev->stats.tx_dropped++;
919 		return NET_XMIT_DROP;
920 	}
921 
922 	if (skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP &&
923 	    priv->tx_ts_enabled && cpts_can_timestamp(cpts, skb))
924 		skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS;
925 
926 	q_idx = skb_get_queue_mapping(skb);
927 	if (q_idx >= cpsw->tx_ch_num)
928 		q_idx = q_idx % cpsw->tx_ch_num;
929 
930 	txch = cpsw->txv[q_idx].ch;
931 	txq = netdev_get_tx_queue(ndev, q_idx);
932 	skb_tx_timestamp(skb);
933 	ret = cpdma_chan_submit(txch, skb, skb->data, skb->len,
934 				priv->emac_port + cpsw->data.dual_emac);
935 	if (unlikely(ret != 0)) {
936 		cpsw_err(priv, tx_err, "desc submit failed\n");
937 		goto fail;
938 	}
939 
940 	/* If there is no more tx desc left free then we need to
941 	 * tell the kernel to stop sending us tx frames.
942 	 */
943 	if (unlikely(!cpdma_check_free_tx_desc(txch))) {
944 		netif_tx_stop_queue(txq);
945 
946 		/* Barrier, so that stop_queue visible to other cpus */
947 		smp_mb__after_atomic();
948 
949 		if (cpdma_check_free_tx_desc(txch))
950 			netif_tx_wake_queue(txq);
951 	}
952 
953 	return NETDEV_TX_OK;
954 fail:
955 	ndev->stats.tx_dropped++;
956 	netif_tx_stop_queue(txq);
957 
958 	/* Barrier, so that stop_queue visible to other cpus */
959 	smp_mb__after_atomic();
960 
961 	if (cpdma_check_free_tx_desc(txch))
962 		netif_tx_wake_queue(txq);
963 
964 	return NETDEV_TX_BUSY;
965 }
966 
cpsw_ndo_set_mac_address(struct net_device * ndev,void * p)967 static int cpsw_ndo_set_mac_address(struct net_device *ndev, void *p)
968 {
969 	struct cpsw_priv *priv = netdev_priv(ndev);
970 	struct sockaddr *addr = (struct sockaddr *)p;
971 	struct cpsw_common *cpsw = priv->cpsw;
972 	int flags = 0;
973 	u16 vid = 0;
974 	int ret;
975 
976 	if (!is_valid_ether_addr(addr->sa_data))
977 		return -EADDRNOTAVAIL;
978 
979 	ret = pm_runtime_resume_and_get(cpsw->dev);
980 	if (ret < 0)
981 		return ret;
982 
983 	if (cpsw->data.dual_emac) {
984 		vid = cpsw->slaves[priv->emac_port].port_vlan;
985 		flags = ALE_VLAN;
986 	}
987 
988 	cpsw_ale_del_ucast(cpsw->ale, priv->mac_addr, HOST_PORT_NUM,
989 			   flags, vid);
990 	cpsw_ale_add_ucast(cpsw->ale, addr->sa_data, HOST_PORT_NUM,
991 			   flags, vid);
992 
993 	memcpy(priv->mac_addr, addr->sa_data, ETH_ALEN);
994 	eth_hw_addr_set(ndev, priv->mac_addr);
995 	for_each_slave(priv, cpsw_set_slave_mac, priv);
996 
997 	pm_runtime_put(cpsw->dev);
998 
999 	return 0;
1000 }
1001 
cpsw_add_vlan_ale_entry(struct cpsw_priv * priv,unsigned short vid)1002 static inline int cpsw_add_vlan_ale_entry(struct cpsw_priv *priv,
1003 				unsigned short vid)
1004 {
1005 	int ret;
1006 	int unreg_mcast_mask = 0;
1007 	int mcast_mask;
1008 	u32 port_mask;
1009 	struct cpsw_common *cpsw = priv->cpsw;
1010 
1011 	if (cpsw->data.dual_emac) {
1012 		port_mask = (1 << (priv->emac_port + 1)) | ALE_PORT_HOST;
1013 
1014 		mcast_mask = ALE_PORT_HOST;
1015 		if (priv->ndev->flags & IFF_ALLMULTI)
1016 			unreg_mcast_mask = mcast_mask;
1017 	} else {
1018 		port_mask = ALE_ALL_PORTS;
1019 		mcast_mask = port_mask;
1020 
1021 		if (priv->ndev->flags & IFF_ALLMULTI)
1022 			unreg_mcast_mask = ALE_ALL_PORTS;
1023 		else
1024 			unreg_mcast_mask = ALE_PORT_1 | ALE_PORT_2;
1025 	}
1026 
1027 	ret = cpsw_ale_add_vlan(cpsw->ale, vid, port_mask, 0, port_mask,
1028 				unreg_mcast_mask);
1029 	if (ret != 0)
1030 		return ret;
1031 
1032 	ret = cpsw_ale_add_ucast(cpsw->ale, priv->mac_addr,
1033 				 HOST_PORT_NUM, ALE_VLAN, vid);
1034 	if (ret != 0)
1035 		goto clean_vid;
1036 
1037 	ret = cpsw_ale_add_mcast(cpsw->ale, priv->ndev->broadcast,
1038 				 mcast_mask, ALE_VLAN, vid, 0);
1039 	if (ret != 0)
1040 		goto clean_vlan_ucast;
1041 	return 0;
1042 
1043 clean_vlan_ucast:
1044 	cpsw_ale_del_ucast(cpsw->ale, priv->mac_addr,
1045 			   HOST_PORT_NUM, ALE_VLAN, vid);
1046 clean_vid:
1047 	cpsw_ale_del_vlan(cpsw->ale, vid, 0);
1048 	return ret;
1049 }
1050 
cpsw_ndo_vlan_rx_add_vid(struct net_device * ndev,__be16 proto,u16 vid)1051 static int cpsw_ndo_vlan_rx_add_vid(struct net_device *ndev,
1052 				    __be16 proto, u16 vid)
1053 {
1054 	struct cpsw_priv *priv = netdev_priv(ndev);
1055 	struct cpsw_common *cpsw = priv->cpsw;
1056 	int ret;
1057 
1058 	if (vid == cpsw->data.default_vlan)
1059 		return 0;
1060 
1061 	ret = pm_runtime_resume_and_get(cpsw->dev);
1062 	if (ret < 0)
1063 		return ret;
1064 
1065 	if (cpsw->data.dual_emac) {
1066 		/* In dual EMAC, reserved VLAN id should not be used for
1067 		 * creating VLAN interfaces as this can break the dual
1068 		 * EMAC port separation
1069 		 */
1070 		int i;
1071 
1072 		for (i = 0; i < cpsw->data.slaves; i++) {
1073 			if (vid == cpsw->slaves[i].port_vlan) {
1074 				ret = -EINVAL;
1075 				goto err;
1076 			}
1077 		}
1078 	}
1079 
1080 	dev_info(priv->dev, "Adding vlanid %d to vlan filter\n", vid);
1081 	ret = cpsw_add_vlan_ale_entry(priv, vid);
1082 err:
1083 	pm_runtime_put(cpsw->dev);
1084 	return ret;
1085 }
1086 
cpsw_ndo_vlan_rx_kill_vid(struct net_device * ndev,__be16 proto,u16 vid)1087 static int cpsw_ndo_vlan_rx_kill_vid(struct net_device *ndev,
1088 				     __be16 proto, u16 vid)
1089 {
1090 	struct cpsw_priv *priv = netdev_priv(ndev);
1091 	struct cpsw_common *cpsw = priv->cpsw;
1092 	int ret;
1093 
1094 	if (vid == cpsw->data.default_vlan)
1095 		return 0;
1096 
1097 	ret = pm_runtime_resume_and_get(cpsw->dev);
1098 	if (ret < 0)
1099 		return ret;
1100 
1101 	if (cpsw->data.dual_emac) {
1102 		int i;
1103 
1104 		for (i = 0; i < cpsw->data.slaves; i++) {
1105 			if (vid == cpsw->slaves[i].port_vlan)
1106 				goto err;
1107 		}
1108 	}
1109 
1110 	dev_info(priv->dev, "removing vlanid %d from vlan filter\n", vid);
1111 	ret = cpsw_ale_del_vlan(cpsw->ale, vid, 0);
1112 	ret |= cpsw_ale_del_ucast(cpsw->ale, priv->mac_addr,
1113 				  HOST_PORT_NUM, ALE_VLAN, vid);
1114 	ret |= cpsw_ale_del_mcast(cpsw->ale, priv->ndev->broadcast,
1115 				  0, ALE_VLAN, vid);
1116 	ret |= cpsw_ale_flush_multicast(cpsw->ale, ALE_PORT_HOST, vid);
1117 err:
1118 	pm_runtime_put(cpsw->dev);
1119 	return ret;
1120 }
1121 
cpsw_ndo_xdp_xmit(struct net_device * ndev,int n,struct xdp_frame ** frames,u32 flags)1122 static int cpsw_ndo_xdp_xmit(struct net_device *ndev, int n,
1123 			     struct xdp_frame **frames, u32 flags)
1124 {
1125 	struct cpsw_priv *priv = netdev_priv(ndev);
1126 	struct cpsw_common *cpsw = priv->cpsw;
1127 	struct xdp_frame *xdpf;
1128 	int i, nxmit = 0, port;
1129 
1130 	if (unlikely(flags & ~XDP_XMIT_FLAGS_MASK))
1131 		return -EINVAL;
1132 
1133 	for (i = 0; i < n; i++) {
1134 		xdpf = frames[i];
1135 		if (xdpf->len < CPSW_MIN_PACKET_SIZE)
1136 			break;
1137 
1138 		port = priv->emac_port + cpsw->data.dual_emac;
1139 		if (cpsw_xdp_tx_frame(priv, xdpf, NULL, port))
1140 			break;
1141 		nxmit++;
1142 	}
1143 
1144 	return nxmit;
1145 }
1146 
1147 #ifdef CONFIG_NET_POLL_CONTROLLER
cpsw_ndo_poll_controller(struct net_device * ndev)1148 static void cpsw_ndo_poll_controller(struct net_device *ndev)
1149 {
1150 	struct cpsw_common *cpsw = ndev_to_cpsw(ndev);
1151 
1152 	cpsw_intr_disable(cpsw);
1153 	cpsw_rx_interrupt(cpsw->irqs_table[0], cpsw);
1154 	cpsw_tx_interrupt(cpsw->irqs_table[1], cpsw);
1155 	cpsw_intr_enable(cpsw);
1156 }
1157 #endif
1158 
1159 static const struct net_device_ops cpsw_netdev_ops = {
1160 	.ndo_open		= cpsw_ndo_open,
1161 	.ndo_stop		= cpsw_ndo_stop,
1162 	.ndo_start_xmit		= cpsw_ndo_start_xmit,
1163 	.ndo_set_mac_address	= cpsw_ndo_set_mac_address,
1164 	.ndo_eth_ioctl		= cpsw_ndo_ioctl,
1165 	.ndo_validate_addr	= eth_validate_addr,
1166 	.ndo_tx_timeout		= cpsw_ndo_tx_timeout,
1167 	.ndo_set_rx_mode	= cpsw_ndo_set_rx_mode,
1168 	.ndo_set_tx_maxrate	= cpsw_ndo_set_tx_maxrate,
1169 #ifdef CONFIG_NET_POLL_CONTROLLER
1170 	.ndo_poll_controller	= cpsw_ndo_poll_controller,
1171 #endif
1172 	.ndo_vlan_rx_add_vid	= cpsw_ndo_vlan_rx_add_vid,
1173 	.ndo_vlan_rx_kill_vid	= cpsw_ndo_vlan_rx_kill_vid,
1174 	.ndo_setup_tc           = cpsw_ndo_setup_tc,
1175 	.ndo_bpf		= cpsw_ndo_bpf,
1176 	.ndo_xdp_xmit		= cpsw_ndo_xdp_xmit,
1177 };
1178 
cpsw_get_drvinfo(struct net_device * ndev,struct ethtool_drvinfo * info)1179 static void cpsw_get_drvinfo(struct net_device *ndev,
1180 			     struct ethtool_drvinfo *info)
1181 {
1182 	struct cpsw_common *cpsw = ndev_to_cpsw(ndev);
1183 	struct platform_device	*pdev = to_platform_device(cpsw->dev);
1184 
1185 	strscpy(info->driver, "cpsw", sizeof(info->driver));
1186 	strscpy(info->version, "1.0", sizeof(info->version));
1187 	strscpy(info->bus_info, pdev->name, sizeof(info->bus_info));
1188 }
1189 
cpsw_set_pauseparam(struct net_device * ndev,struct ethtool_pauseparam * pause)1190 static int cpsw_set_pauseparam(struct net_device *ndev,
1191 			       struct ethtool_pauseparam *pause)
1192 {
1193 	struct cpsw_priv *priv = netdev_priv(ndev);
1194 	bool link;
1195 
1196 	priv->rx_pause = pause->rx_pause ? true : false;
1197 	priv->tx_pause = pause->tx_pause ? true : false;
1198 
1199 	for_each_slave(priv, _cpsw_adjust_link, priv, &link);
1200 	return 0;
1201 }
1202 
cpsw_set_channels(struct net_device * ndev,struct ethtool_channels * chs)1203 static int cpsw_set_channels(struct net_device *ndev,
1204 			     struct ethtool_channels *chs)
1205 {
1206 	return cpsw_set_channels_common(ndev, chs, cpsw_rx_handler);
1207 }
1208 
1209 static const struct ethtool_ops cpsw_ethtool_ops = {
1210 	.supported_coalesce_params = ETHTOOL_COALESCE_RX_USECS,
1211 	.get_drvinfo	= cpsw_get_drvinfo,
1212 	.get_msglevel	= cpsw_get_msglevel,
1213 	.set_msglevel	= cpsw_set_msglevel,
1214 	.get_link	= ethtool_op_get_link,
1215 	.get_ts_info	= cpsw_get_ts_info,
1216 	.get_coalesce	= cpsw_get_coalesce,
1217 	.set_coalesce	= cpsw_set_coalesce,
1218 	.get_sset_count		= cpsw_get_sset_count,
1219 	.get_strings		= cpsw_get_strings,
1220 	.get_ethtool_stats	= cpsw_get_ethtool_stats,
1221 	.get_pauseparam		= cpsw_get_pauseparam,
1222 	.set_pauseparam		= cpsw_set_pauseparam,
1223 	.get_wol	= cpsw_get_wol,
1224 	.set_wol	= cpsw_set_wol,
1225 	.get_regs_len	= cpsw_get_regs_len,
1226 	.get_regs	= cpsw_get_regs,
1227 	.begin		= cpsw_ethtool_op_begin,
1228 	.complete	= cpsw_ethtool_op_complete,
1229 	.get_channels	= cpsw_get_channels,
1230 	.set_channels	= cpsw_set_channels,
1231 	.get_link_ksettings	= cpsw_get_link_ksettings,
1232 	.set_link_ksettings	= cpsw_set_link_ksettings,
1233 	.get_eee	= cpsw_get_eee,
1234 	.nway_reset	= cpsw_nway_reset,
1235 	.get_ringparam = cpsw_get_ringparam,
1236 	.set_ringparam = cpsw_set_ringparam,
1237 };
1238 
cpsw_probe_dt(struct cpsw_platform_data * data,struct platform_device * pdev)1239 static int cpsw_probe_dt(struct cpsw_platform_data *data,
1240 			 struct platform_device *pdev)
1241 {
1242 	struct device_node *node = pdev->dev.of_node;
1243 	struct device_node *slave_node;
1244 	int i = 0, ret;
1245 	u32 prop;
1246 
1247 	if (!node)
1248 		return -EINVAL;
1249 
1250 	if (of_property_read_u32(node, "slaves", &prop)) {
1251 		dev_err(&pdev->dev, "Missing slaves property in the DT.\n");
1252 		return -EINVAL;
1253 	}
1254 	data->slaves = prop;
1255 
1256 	if (of_property_read_u32(node, "active_slave", &prop)) {
1257 		dev_err(&pdev->dev, "Missing active_slave property in the DT.\n");
1258 		return -EINVAL;
1259 	}
1260 	data->active_slave = prop;
1261 
1262 	data->slave_data = devm_kcalloc(&pdev->dev,
1263 					data->slaves,
1264 					sizeof(struct cpsw_slave_data),
1265 					GFP_KERNEL);
1266 	if (!data->slave_data)
1267 		return -ENOMEM;
1268 
1269 	if (of_property_read_u32(node, "cpdma_channels", &prop)) {
1270 		dev_err(&pdev->dev, "Missing cpdma_channels property in the DT.\n");
1271 		return -EINVAL;
1272 	}
1273 	data->channels = prop;
1274 
1275 	if (of_property_read_u32(node, "bd_ram_size", &prop)) {
1276 		dev_err(&pdev->dev, "Missing bd_ram_size property in the DT.\n");
1277 		return -EINVAL;
1278 	}
1279 	data->bd_ram_size = prop;
1280 
1281 	if (of_property_read_u32(node, "mac_control", &prop)) {
1282 		dev_err(&pdev->dev, "Missing mac_control property in the DT.\n");
1283 		return -EINVAL;
1284 	}
1285 	data->mac_control = prop;
1286 
1287 	if (of_property_read_bool(node, "dual_emac"))
1288 		data->dual_emac = true;
1289 
1290 	/*
1291 	 * Populate all the child nodes here...
1292 	 */
1293 	ret = of_platform_populate(node, NULL, NULL, &pdev->dev);
1294 	/* We do not want to force this, as in some cases may not have child */
1295 	if (ret)
1296 		dev_warn(&pdev->dev, "Doesn't have any child node\n");
1297 
1298 	for_each_available_child_of_node(node, slave_node) {
1299 		struct cpsw_slave_data *slave_data = data->slave_data + i;
1300 		int lenp;
1301 		const __be32 *parp;
1302 
1303 		/* This is no slave child node, continue */
1304 		if (!of_node_name_eq(slave_node, "slave"))
1305 			continue;
1306 
1307 		slave_data->ifphy = devm_of_phy_get(&pdev->dev, slave_node,
1308 						    NULL);
1309 		if (!IS_ENABLED(CONFIG_TI_CPSW_PHY_SEL) &&
1310 		    IS_ERR(slave_data->ifphy)) {
1311 			ret = PTR_ERR(slave_data->ifphy);
1312 			dev_err(&pdev->dev,
1313 				"%d: Error retrieving port phy: %d\n", i, ret);
1314 			goto err_node_put;
1315 		}
1316 
1317 		slave_data->slave_node = slave_node;
1318 		slave_data->phy_node = of_parse_phandle(slave_node,
1319 							"phy-handle", 0);
1320 		parp = of_get_property(slave_node, "phy_id", &lenp);
1321 		if (slave_data->phy_node) {
1322 			dev_dbg(&pdev->dev,
1323 				"slave[%d] using phy-handle=\"%pOF\"\n",
1324 				i, slave_data->phy_node);
1325 		} else if (of_phy_is_fixed_link(slave_node)) {
1326 			/* In the case of a fixed PHY, the DT node associated
1327 			 * to the PHY is the Ethernet MAC DT node.
1328 			 */
1329 			ret = of_phy_register_fixed_link(slave_node);
1330 			if (ret) {
1331 				dev_err_probe(&pdev->dev, ret, "failed to register fixed-link phy\n");
1332 				goto err_node_put;
1333 			}
1334 			slave_data->phy_node = of_node_get(slave_node);
1335 		} else if (parp) {
1336 			u32 phyid;
1337 			struct device_node *mdio_node;
1338 			struct platform_device *mdio;
1339 
1340 			if (lenp != (sizeof(__be32) * 2)) {
1341 				dev_err(&pdev->dev, "Invalid slave[%d] phy_id property\n", i);
1342 				goto no_phy_slave;
1343 			}
1344 			mdio_node = of_find_node_by_phandle(be32_to_cpup(parp));
1345 			phyid = be32_to_cpup(parp+1);
1346 			mdio = of_find_device_by_node(mdio_node);
1347 			of_node_put(mdio_node);
1348 			if (!mdio) {
1349 				dev_err(&pdev->dev, "Missing mdio platform device\n");
1350 				ret = -EINVAL;
1351 				goto err_node_put;
1352 			}
1353 			snprintf(slave_data->phy_id, sizeof(slave_data->phy_id),
1354 				 PHY_ID_FMT, mdio->name, phyid);
1355 			put_device(&mdio->dev);
1356 		} else {
1357 			dev_err(&pdev->dev,
1358 				"No slave[%d] phy_id, phy-handle, or fixed-link property\n",
1359 				i);
1360 			goto no_phy_slave;
1361 		}
1362 		ret = of_get_phy_mode(slave_node, &slave_data->phy_if);
1363 		if (ret) {
1364 			dev_err(&pdev->dev, "Missing or malformed slave[%d] phy-mode property\n",
1365 				i);
1366 			goto err_node_put;
1367 		}
1368 
1369 no_phy_slave:
1370 		ret = of_get_mac_address(slave_node, slave_data->mac_addr);
1371 		if (ret) {
1372 			ret = ti_cm_get_macid(&pdev->dev, i,
1373 					      slave_data->mac_addr);
1374 			if (ret)
1375 				goto err_node_put;
1376 		}
1377 		if (data->dual_emac) {
1378 			if (of_property_read_u32(slave_node, "dual_emac_res_vlan",
1379 						 &prop)) {
1380 				dev_err(&pdev->dev, "Missing dual_emac_res_vlan in DT.\n");
1381 				slave_data->dual_emac_res_vlan = i+1;
1382 				dev_err(&pdev->dev, "Using %d as Reserved VLAN for %d slave\n",
1383 					slave_data->dual_emac_res_vlan, i);
1384 			} else {
1385 				slave_data->dual_emac_res_vlan = prop;
1386 			}
1387 		}
1388 
1389 		i++;
1390 		if (i == data->slaves) {
1391 			ret = 0;
1392 			goto err_node_put;
1393 		}
1394 	}
1395 
1396 	return 0;
1397 
1398 err_node_put:
1399 	of_node_put(slave_node);
1400 	return ret;
1401 }
1402 
cpsw_remove_dt(struct platform_device * pdev)1403 static void cpsw_remove_dt(struct platform_device *pdev)
1404 {
1405 	struct cpsw_common *cpsw = platform_get_drvdata(pdev);
1406 	struct cpsw_platform_data *data = &cpsw->data;
1407 	struct device_node *node = pdev->dev.of_node;
1408 	struct device_node *slave_node;
1409 	int i = 0;
1410 
1411 	for_each_available_child_of_node(node, slave_node) {
1412 		struct cpsw_slave_data *slave_data = &data->slave_data[i];
1413 
1414 		if (!of_node_name_eq(slave_node, "slave"))
1415 			continue;
1416 
1417 		if (of_phy_is_fixed_link(slave_node))
1418 			of_phy_deregister_fixed_link(slave_node);
1419 
1420 		of_node_put(slave_data->phy_node);
1421 
1422 		i++;
1423 		if (i == data->slaves) {
1424 			of_node_put(slave_node);
1425 			break;
1426 		}
1427 	}
1428 
1429 	of_platform_depopulate(&pdev->dev);
1430 }
1431 
cpsw_probe_dual_emac(struct cpsw_priv * priv)1432 static int cpsw_probe_dual_emac(struct cpsw_priv *priv)
1433 {
1434 	struct cpsw_common		*cpsw = priv->cpsw;
1435 	struct cpsw_platform_data	*data = &cpsw->data;
1436 	struct net_device		*ndev;
1437 	struct cpsw_priv		*priv_sl2;
1438 	int ret = 0;
1439 
1440 	ndev = devm_alloc_etherdev_mqs(cpsw->dev, sizeof(struct cpsw_priv),
1441 				       CPSW_MAX_QUEUES, CPSW_MAX_QUEUES);
1442 	if (!ndev) {
1443 		dev_err(cpsw->dev, "cpsw: error allocating net_device\n");
1444 		return -ENOMEM;
1445 	}
1446 
1447 	priv_sl2 = netdev_priv(ndev);
1448 	priv_sl2->cpsw = cpsw;
1449 	priv_sl2->ndev = ndev;
1450 	priv_sl2->dev  = &ndev->dev;
1451 	priv_sl2->msg_enable = netif_msg_init(debug_level, CPSW_DEBUG);
1452 
1453 	if (is_valid_ether_addr(data->slave_data[1].mac_addr)) {
1454 		memcpy(priv_sl2->mac_addr, data->slave_data[1].mac_addr,
1455 			ETH_ALEN);
1456 		dev_info(cpsw->dev, "cpsw: Detected MACID = %pM\n",
1457 			 priv_sl2->mac_addr);
1458 	} else {
1459 		eth_random_addr(priv_sl2->mac_addr);
1460 		dev_info(cpsw->dev, "cpsw: Random MACID = %pM\n",
1461 			 priv_sl2->mac_addr);
1462 	}
1463 	eth_hw_addr_set(ndev, priv_sl2->mac_addr);
1464 
1465 	priv_sl2->emac_port = 1;
1466 	cpsw->slaves[1].ndev = ndev;
1467 	ndev->features |= NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_HW_VLAN_CTAG_RX;
1468 	ndev->xdp_features = NETDEV_XDP_ACT_BASIC | NETDEV_XDP_ACT_REDIRECT |
1469 			     NETDEV_XDP_ACT_NDO_XMIT;
1470 
1471 	ndev->netdev_ops = &cpsw_netdev_ops;
1472 	ndev->ethtool_ops = &cpsw_ethtool_ops;
1473 
1474 	/* register the network device */
1475 	SET_NETDEV_DEV(ndev, cpsw->dev);
1476 	ndev->dev.of_node = cpsw->slaves[1].data->slave_node;
1477 	ret = register_netdev(ndev);
1478 	if (ret)
1479 		dev_err(cpsw->dev, "cpsw: error registering net device\n");
1480 
1481 	return ret;
1482 }
1483 
1484 static const struct of_device_id cpsw_of_mtable[] = {
1485 	{ .compatible = "ti,cpsw"},
1486 	{ .compatible = "ti,am335x-cpsw"},
1487 	{ .compatible = "ti,am4372-cpsw"},
1488 	{ .compatible = "ti,dra7-cpsw"},
1489 	{ /* sentinel */ },
1490 };
1491 MODULE_DEVICE_TABLE(of, cpsw_of_mtable);
1492 
1493 static const struct soc_device_attribute cpsw_soc_devices[] = {
1494 	{ .family = "AM33xx", .revision = "ES1.0"},
1495 	{ /* sentinel */ }
1496 };
1497 
cpsw_probe(struct platform_device * pdev)1498 static int cpsw_probe(struct platform_device *pdev)
1499 {
1500 	struct device			*dev = &pdev->dev;
1501 	struct clk			*clk;
1502 	struct cpsw_platform_data	*data;
1503 	struct net_device		*ndev;
1504 	struct cpsw_priv		*priv;
1505 	void __iomem			*ss_regs;
1506 	struct resource			*ss_res;
1507 	struct gpio_descs		*mode;
1508 	const struct soc_device_attribute *soc;
1509 	struct cpsw_common		*cpsw;
1510 	int ret = 0, ch;
1511 	int irq;
1512 
1513 	cpsw = devm_kzalloc(dev, sizeof(struct cpsw_common), GFP_KERNEL);
1514 	if (!cpsw)
1515 		return -ENOMEM;
1516 
1517 	platform_set_drvdata(pdev, cpsw);
1518 	cpsw_slave_index = cpsw_slave_index_priv;
1519 
1520 	cpsw->dev = dev;
1521 
1522 	mode = devm_gpiod_get_array_optional(dev, "mode", GPIOD_OUT_LOW);
1523 	if (IS_ERR(mode)) {
1524 		ret = PTR_ERR(mode);
1525 		dev_err(dev, "gpio request failed, ret %d\n", ret);
1526 		return ret;
1527 	}
1528 
1529 	clk = devm_clk_get(dev, "fck");
1530 	if (IS_ERR(clk)) {
1531 		ret = PTR_ERR(clk);
1532 		dev_err(dev, "fck is not found %d\n", ret);
1533 		return ret;
1534 	}
1535 	cpsw->bus_freq_mhz = clk_get_rate(clk) / 1000000;
1536 
1537 	ss_regs = devm_platform_get_and_ioremap_resource(pdev, 0, &ss_res);
1538 	if (IS_ERR(ss_regs))
1539 		return PTR_ERR(ss_regs);
1540 	cpsw->regs = ss_regs;
1541 
1542 	cpsw->wr_regs = devm_platform_ioremap_resource(pdev, 1);
1543 	if (IS_ERR(cpsw->wr_regs))
1544 		return PTR_ERR(cpsw->wr_regs);
1545 
1546 	/* RX IRQ */
1547 	irq = platform_get_irq(pdev, 1);
1548 	if (irq < 0)
1549 		return irq;
1550 	cpsw->irqs_table[0] = irq;
1551 
1552 	/* TX IRQ */
1553 	irq = platform_get_irq(pdev, 2);
1554 	if (irq < 0)
1555 		return irq;
1556 	cpsw->irqs_table[1] = irq;
1557 
1558 	/* get misc irq*/
1559 	irq = platform_get_irq(pdev, 3);
1560 	if (irq <= 0)
1561 		return irq;
1562 	cpsw->misc_irq = irq;
1563 
1564 	/*
1565 	 * This may be required here for child devices.
1566 	 */
1567 	pm_runtime_enable(dev);
1568 
1569 	/* Need to enable clocks with runtime PM api to access module
1570 	 * registers
1571 	 */
1572 	ret = pm_runtime_resume_and_get(dev);
1573 	if (ret < 0)
1574 		goto clean_runtime_disable_ret;
1575 
1576 	ret = cpsw_probe_dt(&cpsw->data, pdev);
1577 	if (ret)
1578 		goto clean_dt_ret;
1579 
1580 	soc = soc_device_match(cpsw_soc_devices);
1581 	if (soc)
1582 		cpsw->quirk_irq = true;
1583 
1584 	data = &cpsw->data;
1585 	cpsw->slaves = devm_kcalloc(dev,
1586 				    data->slaves, sizeof(struct cpsw_slave),
1587 				    GFP_KERNEL);
1588 	if (!cpsw->slaves) {
1589 		ret = -ENOMEM;
1590 		goto clean_dt_ret;
1591 	}
1592 
1593 	cpsw->rx_packet_max = max(rx_packet_max, CPSW_MAX_PACKET_SIZE);
1594 	cpsw->descs_pool_size = descs_pool_size;
1595 
1596 	ret = cpsw_init_common(cpsw, ss_regs, ale_ageout,
1597 			       ss_res->start + CPSW2_BD_OFFSET,
1598 			       descs_pool_size);
1599 	if (ret)
1600 		goto clean_dt_ret;
1601 
1602 	ch = cpsw->quirk_irq ? 0 : 7;
1603 	cpsw->txv[0].ch = cpdma_chan_create(cpsw->dma, ch, cpsw_tx_handler, 0);
1604 	if (IS_ERR(cpsw->txv[0].ch)) {
1605 		dev_err(dev, "error initializing tx dma channel\n");
1606 		ret = PTR_ERR(cpsw->txv[0].ch);
1607 		goto clean_cpts;
1608 	}
1609 
1610 	cpsw->rxv[0].ch = cpdma_chan_create(cpsw->dma, 0, cpsw_rx_handler, 1);
1611 	if (IS_ERR(cpsw->rxv[0].ch)) {
1612 		dev_err(dev, "error initializing rx dma channel\n");
1613 		ret = PTR_ERR(cpsw->rxv[0].ch);
1614 		goto clean_cpts;
1615 	}
1616 	cpsw_split_res(cpsw);
1617 
1618 	/* setup netdev */
1619 	ndev = devm_alloc_etherdev_mqs(dev, sizeof(struct cpsw_priv),
1620 				       CPSW_MAX_QUEUES, CPSW_MAX_QUEUES);
1621 	if (!ndev) {
1622 		dev_err(dev, "error allocating net_device\n");
1623 		ret = -ENOMEM;
1624 		goto clean_cpts;
1625 	}
1626 
1627 	priv = netdev_priv(ndev);
1628 	priv->cpsw = cpsw;
1629 	priv->ndev = ndev;
1630 	priv->dev  = dev;
1631 	priv->msg_enable = netif_msg_init(debug_level, CPSW_DEBUG);
1632 	priv->emac_port = 0;
1633 
1634 	if (is_valid_ether_addr(data->slave_data[0].mac_addr)) {
1635 		memcpy(priv->mac_addr, data->slave_data[0].mac_addr, ETH_ALEN);
1636 		dev_info(dev, "Detected MACID = %pM\n", priv->mac_addr);
1637 	} else {
1638 		eth_random_addr(priv->mac_addr);
1639 		dev_info(dev, "Random MACID = %pM\n", priv->mac_addr);
1640 	}
1641 
1642 	eth_hw_addr_set(ndev, priv->mac_addr);
1643 
1644 	cpsw->slaves[0].ndev = ndev;
1645 
1646 	ndev->features |= NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_HW_VLAN_CTAG_RX;
1647 	ndev->xdp_features = NETDEV_XDP_ACT_BASIC | NETDEV_XDP_ACT_REDIRECT |
1648 			     NETDEV_XDP_ACT_NDO_XMIT;
1649 
1650 	ndev->netdev_ops = &cpsw_netdev_ops;
1651 	ndev->ethtool_ops = &cpsw_ethtool_ops;
1652 	netif_napi_add(ndev, &cpsw->napi_rx,
1653 		       cpsw->quirk_irq ? cpsw_rx_poll : cpsw_rx_mq_poll);
1654 	netif_napi_add_tx(ndev, &cpsw->napi_tx,
1655 			  cpsw->quirk_irq ? cpsw_tx_poll : cpsw_tx_mq_poll);
1656 
1657 	/* register the network device */
1658 	SET_NETDEV_DEV(ndev, dev);
1659 	ndev->dev.of_node = cpsw->slaves[0].data->slave_node;
1660 	ret = register_netdev(ndev);
1661 	if (ret) {
1662 		dev_err(dev, "error registering net device\n");
1663 		ret = -ENODEV;
1664 		goto clean_cpts;
1665 	}
1666 
1667 	if (cpsw->data.dual_emac) {
1668 		ret = cpsw_probe_dual_emac(priv);
1669 		if (ret) {
1670 			cpsw_err(priv, probe, "error probe slave 2 emac interface\n");
1671 			goto clean_unregister_netdev_ret;
1672 		}
1673 	}
1674 
1675 	/* Grab RX and TX IRQs. Note that we also have RX_THRESHOLD and
1676 	 * MISC IRQs which are always kept disabled with this driver so
1677 	 * we will not request them.
1678 	 *
1679 	 * If anyone wants to implement support for those, make sure to
1680 	 * first request and append them to irqs_table array.
1681 	 */
1682 	ret = devm_request_irq(dev, cpsw->irqs_table[0], cpsw_rx_interrupt,
1683 			       0, dev_name(dev), cpsw);
1684 	if (ret < 0) {
1685 		dev_err(dev, "error attaching irq (%d)\n", ret);
1686 		goto clean_unregister_netdev_ret;
1687 	}
1688 
1689 
1690 	ret = devm_request_irq(dev, cpsw->irqs_table[1], cpsw_tx_interrupt,
1691 			       0, dev_name(&pdev->dev), cpsw);
1692 	if (ret < 0) {
1693 		dev_err(dev, "error attaching irq (%d)\n", ret);
1694 		goto clean_unregister_netdev_ret;
1695 	}
1696 
1697 	if (!cpsw->cpts)
1698 		goto skip_cpts;
1699 
1700 	ret = devm_request_irq(&pdev->dev, cpsw->misc_irq, cpsw_misc_interrupt,
1701 			       0, dev_name(&pdev->dev), cpsw);
1702 	if (ret < 0) {
1703 		dev_err(dev, "error attaching misc irq (%d)\n", ret);
1704 		goto clean_unregister_netdev_ret;
1705 	}
1706 
1707 	/* Enable misc CPTS evnt_pend IRQ */
1708 	cpts_set_irqpoll(cpsw->cpts, false);
1709 
1710 skip_cpts:
1711 	cpsw_notice(priv, probe,
1712 		    "initialized device (regs %pa, irq %d, pool size %d)\n",
1713 		    &ss_res->start, cpsw->irqs_table[0], descs_pool_size);
1714 
1715 	pm_runtime_put(&pdev->dev);
1716 
1717 	return 0;
1718 
1719 clean_unregister_netdev_ret:
1720 	unregister_netdev(ndev);
1721 clean_cpts:
1722 	cpts_release(cpsw->cpts);
1723 	cpdma_ctlr_destroy(cpsw->dma);
1724 clean_dt_ret:
1725 	cpsw_remove_dt(pdev);
1726 	pm_runtime_put_sync(&pdev->dev);
1727 clean_runtime_disable_ret:
1728 	pm_runtime_disable(&pdev->dev);
1729 	return ret;
1730 }
1731 
cpsw_remove(struct platform_device * pdev)1732 static void cpsw_remove(struct platform_device *pdev)
1733 {
1734 	struct cpsw_common *cpsw = platform_get_drvdata(pdev);
1735 	int i, ret;
1736 
1737 	ret = pm_runtime_resume_and_get(&pdev->dev);
1738 	if (ret < 0) {
1739 		/* Note, if this error path is taken, we're leaking some
1740 		 * resources.
1741 		 */
1742 		dev_err(&pdev->dev, "Failed to resume device (%pe)\n",
1743 			ERR_PTR(ret));
1744 		return;
1745 	}
1746 
1747 	for (i = 0; i < cpsw->data.slaves; i++)
1748 		if (cpsw->slaves[i].ndev)
1749 			unregister_netdev(cpsw->slaves[i].ndev);
1750 
1751 	cpts_release(cpsw->cpts);
1752 	cpdma_ctlr_destroy(cpsw->dma);
1753 	cpsw_remove_dt(pdev);
1754 	pm_runtime_put_sync(&pdev->dev);
1755 	pm_runtime_disable(&pdev->dev);
1756 }
1757 
1758 #ifdef CONFIG_PM_SLEEP
cpsw_suspend(struct device * dev)1759 static int cpsw_suspend(struct device *dev)
1760 {
1761 	struct cpsw_common *cpsw = dev_get_drvdata(dev);
1762 	int i;
1763 
1764 	rtnl_lock();
1765 
1766 	for (i = 0; i < cpsw->data.slaves; i++)
1767 		if (cpsw->slaves[i].ndev)
1768 			if (netif_running(cpsw->slaves[i].ndev))
1769 				cpsw_ndo_stop(cpsw->slaves[i].ndev);
1770 
1771 	rtnl_unlock();
1772 
1773 	/* Select sleep pin state */
1774 	pinctrl_pm_select_sleep_state(dev);
1775 
1776 	return 0;
1777 }
1778 
cpsw_resume(struct device * dev)1779 static int cpsw_resume(struct device *dev)
1780 {
1781 	struct cpsw_common *cpsw = dev_get_drvdata(dev);
1782 	int i;
1783 
1784 	/* Select default pin state */
1785 	pinctrl_pm_select_default_state(dev);
1786 
1787 	/* shut up ASSERT_RTNL() warning in netif_set_real_num_tx/rx_queues */
1788 	rtnl_lock();
1789 
1790 	for (i = 0; i < cpsw->data.slaves; i++)
1791 		if (cpsw->slaves[i].ndev)
1792 			if (netif_running(cpsw->slaves[i].ndev))
1793 				cpsw_ndo_open(cpsw->slaves[i].ndev);
1794 
1795 	rtnl_unlock();
1796 
1797 	return 0;
1798 }
1799 #endif
1800 
1801 static SIMPLE_DEV_PM_OPS(cpsw_pm_ops, cpsw_suspend, cpsw_resume);
1802 
1803 static struct platform_driver cpsw_driver = {
1804 	.driver = {
1805 		.name	 = "cpsw",
1806 		.pm	 = &cpsw_pm_ops,
1807 		.of_match_table = cpsw_of_mtable,
1808 	},
1809 	.probe = cpsw_probe,
1810 	.remove = cpsw_remove,
1811 };
1812 
1813 module_platform_driver(cpsw_driver);
1814 
1815 MODULE_LICENSE("GPL");
1816 MODULE_AUTHOR("Cyril Chemparathy <cyril@ti.com>");
1817 MODULE_AUTHOR("Mugunthan V N <mugunthanvnm@ti.com>");
1818 MODULE_DESCRIPTION("TI CPSW Ethernet driver");
1819