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
50static int debug_level;
51module_param(debug_level, int, 0);
52MODULE_PARM_DESC(debug_level, "cpsw debug level (NETIF_MSG bits)");
53
54static int ale_ageout = 10;
55module_param(ale_ageout, int, 0);
56MODULE_PARM_DESC(ale_ageout, "cpsw ale ageout interval (seconds)");
57
58static int rx_packet_max = CPSW_MAX_PACKET_SIZE;
59module_param(rx_packet_max, int, 0);
60MODULE_PARM_DESC(rx_packet_max, "maximum receive packet size (bytes)");
61
62static int descs_pool_size = CPSW_CPDMA_DESCS_POOL_SIZE_DEFAULT;
63module_param(descs_pool_size, int, 0444);
64MODULE_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
80static 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
86static int cpsw_get_slave_port(u32 slave_num)
87{
88 return slave_num + 1;
89}
90
91static int cpsw_ndo_vlan_rx_add_vid(struct net_device *ndev,
92 __be16 proto, u16 vid);
93
94static 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, port: 0, control: ALE_BYPASS, value: 1);
119
120 dev_dbg(&ndev->dev, "promiscuity enabled\n");
121 } else {
122 /* Disable Bypass */
123 cpsw_ale_control_set(ale, port: 0, control: ALE_BYPASS, value: 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, port: i,
133 control: ALE_PORT_NOLEARN, value: 1);
134 cpsw_ale_control_set(ale, port: i,
135 control: ALE_PORT_NO_SA_UPDATE, value: 1);
136 }
137
138 /* Clear All Untouched entries */
139 cpsw_ale_control_set(ale, port: 0, control: ALE_AGEOUT, value: 1);
140 do {
141 cpu_relax();
142 if (cpsw_ale_control_get(ale, port: 0, control: ALE_AGEOUT))
143 break;
144 } while (time_after(timeout, jiffies));
145 cpsw_ale_control_set(ale, port: 0, control: ALE_AGEOUT, value: 1);
146
147 /* Clear all mcast from ALE */
148 cpsw_ale_flush_multicast(ale, ALE_ALL_PORTS, vid: -1);
149 __hw_addr_ref_unsync_dev(list: &ndev->mc, dev: ndev, NULL);
150
151 /* Flood All Unicast Packets to Host port */
152 cpsw_ale_control_set(ale, port: 0, control: ALE_P0_UNI_FLOOD, value: 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, port: 0, control: ALE_P0_UNI_FLOOD, value: 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, port: i,
161 control: ALE_PORT_NOLEARN, value: 0);
162 cpsw_ale_control_set(ale, port: i,
163 control: ALE_PORT_NO_SA_UPDATE, value: 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 */
178static int cpsw_set_mc(struct net_device *ndev, const u8 *addr,
179 int vid, int add)
180{
181 struct cpsw_priv *priv = netdev_priv(dev: 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(ale: cpsw->ale, addr, port_mask: mask, flags, vid, mcast_state: 0);
197 else
198 ret = cpsw_ale_del_mcast(ale: cpsw->ale, addr, port_mask: 0, flags, vid);
199
200 return ret;
201}
202
203static 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(addr1: ha->addr, addr2: 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(ndev: sync_ctx->ndev, addr: sync_ctx->addr, vid, add: 0);
226 return 0;
227 }
228
229 if (found)
230 ret = cpsw_set_mc(ndev: sync_ctx->ndev, addr: sync_ctx->addr, vid, add: 1);
231
232 return ret;
233}
234
235static 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(dev: ndev, action: cpsw_update_vlan_mc, arg: &sync_ctx);
246 if (sync_ctx.consumed < num && !ret)
247 ret = cpsw_set_mc(ndev, addr, vid: -1, add: 1);
248
249 return ret;
250}
251
252static 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(dev: ndev, action: cpsw_update_vlan_mc, arg: &sync_ctx);
262 if (sync_ctx.consumed == num)
263 cpsw_set_mc(ndev, addr, vid: -1, add: 0);
264
265 return 0;
266}
267
268static 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(addr1: ha->addr, addr2: 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(ndev: sync_ctx->ndev, addr: sync_ctx->addr, vid, add: 0);
290 return 0;
291}
292
293static 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(dev: ndev, action: cpsw_purge_vlan_mc, arg: &sync_ctx);
302 if (sync_ctx.consumed < num)
303 cpsw_set_mc(ndev, addr, vid: -1, add: 0);
304
305 return 0;
306}
307
308static void cpsw_ndo_set_rx_mode_work(struct work_struct *work)
309{
310 struct cpsw_priv *priv = container_of(work, struct cpsw_priv, rx_mode_work);
311 struct cpsw_common *cpsw = priv->cpsw;
312 struct net_device *ndev = priv->ndev;
313 int slave_port = -1;
314
315 rtnl_lock();
316 if (!netif_running(dev: ndev))
317 goto unlock_rtnl;
318
319 netif_addr_lock_bh(dev: ndev);
320
321 if (cpsw->data.dual_emac)
322 slave_port = priv->emac_port + 1;
323
324 if (ndev->flags & IFF_PROMISC) {
325 /* Enable promiscuous mode */
326 cpsw_set_promiscious(ndev, enable: true);
327 cpsw_ale_set_allmulti(ale: cpsw->ale, IFF_ALLMULTI, port: slave_port);
328 goto unlock_addr;
329 } else {
330 /* Disable promiscuous mode */
331 cpsw_set_promiscious(ndev, enable: false);
332 }
333
334 /* Restore allmulti on vlans if necessary */
335 cpsw_ale_set_allmulti(ale: cpsw->ale,
336 allmulti: ndev->flags & IFF_ALLMULTI, port: slave_port);
337
338 /* add/remove mcast address either for real netdev or for vlan */
339 __hw_addr_ref_sync_dev(list: &ndev->mc, dev: ndev, sync: cpsw_add_mc_addr,
340 unsync: cpsw_del_mc_addr);
341
342unlock_addr:
343 netif_addr_unlock_bh(dev: ndev);
344unlock_rtnl:
345 rtnl_unlock();
346}
347
348static void cpsw_ndo_set_rx_mode(struct net_device *ndev)
349{
350 struct cpsw_priv *priv = netdev_priv(dev: ndev);
351
352 schedule_work(work: &priv->rx_mode_work);
353}
354
355static unsigned int cpsw_rxbuf_total_len(unsigned int len)
356{
357 len += CPSW_HEADROOM_NA;
358 len += SKB_DATA_ALIGN(sizeof(struct skb_shared_info));
359
360 return SKB_DATA_ALIGN(len);
361}
362
363static void cpsw_rx_handler(void *token, int len, int status)
364{
365 struct page *new_page, *page = token;
366 void *pa = page_address(page);
367 struct cpsw_meta_xdp *xmeta = pa + CPSW_XMETA_OFFSET;
368 struct cpsw_common *cpsw = ndev_to_cpsw(xmeta->ndev);
369 int pkt_size = cpsw->rx_packet_max;
370 int ret = 0, port, ch = xmeta->ch;
371 int headroom = CPSW_HEADROOM_NA;
372 struct net_device *ndev = xmeta->ndev;
373 u32 metasize = 0;
374 struct cpsw_priv *priv;
375 struct page_pool *pool;
376 struct sk_buff *skb;
377 struct xdp_buff xdp;
378 dma_addr_t dma;
379
380 if (cpsw->data.dual_emac && status >= 0) {
381 port = CPDMA_RX_SOURCE_PORT(status);
382 if (port)
383 ndev = cpsw->slaves[--port].ndev;
384 }
385
386 priv = netdev_priv(dev: ndev);
387 pool = cpsw->page_pool[ch];
388 if (unlikely(status < 0) || unlikely(!netif_running(ndev))) {
389 /* In dual emac mode check for all interfaces */
390 if (cpsw->data.dual_emac && cpsw->usage_count &&
391 (status >= 0)) {
392 /* The packet received is for the interface which
393 * is already down and the other interface is up
394 * and running, instead of freeing which results
395 * in reducing of the number of rx descriptor in
396 * DMA engine, requeue page back to cpdma.
397 */
398 new_page = page;
399 goto requeue;
400 }
401
402 /* the interface is going down, pages are purged */
403 page_pool_recycle_direct(pool, page);
404 return;
405 }
406
407 new_page = page_pool_dev_alloc_pages(pool);
408 if (unlikely(!new_page)) {
409 new_page = page;
410 ndev->stats.rx_dropped++;
411 goto requeue;
412 }
413
414 if (priv->xdp_prog) {
415 int size = len;
416
417 xdp_init_buff(xdp: &xdp, PAGE_SIZE, rxq: &priv->xdp_rxq[ch]);
418 if (status & CPDMA_RX_VLAN_ENCAP) {
419 headroom += CPSW_RX_VLAN_ENCAP_HDR_SIZE;
420 size -= CPSW_RX_VLAN_ENCAP_HDR_SIZE;
421 }
422
423 xdp_prepare_buff(xdp: &xdp, hard_start: pa, headroom, data_len: size, meta_valid: true);
424
425 port = priv->emac_port + cpsw->data.dual_emac;
426 ret = cpsw_run_xdp(priv, ch, xdp: &xdp, page, port, len: &len);
427 if (ret != CPSW_XDP_PASS)
428 goto requeue;
429
430 headroom = xdp.data - xdp.data_hard_start;
431 metasize = xdp.data - xdp.data_meta;
432
433 /* XDP prog can modify vlan tag, so can't use encap header */
434 status &= ~CPDMA_RX_VLAN_ENCAP;
435 }
436
437 /* pass skb to netstack if no XDP prog or returned XDP_PASS */
438 skb = build_skb(data: pa, frag_size: cpsw_rxbuf_total_len(len: pkt_size));
439 if (!skb) {
440 ndev->stats.rx_dropped++;
441 page_pool_recycle_direct(pool, page);
442 goto requeue;
443 }
444
445 skb_reserve(skb, len: headroom);
446 skb_put(skb, len);
447 if (metasize)
448 skb_metadata_set(skb, meta_len: metasize);
449 skb->dev = ndev;
450 if (status & CPDMA_RX_VLAN_ENCAP)
451 cpsw_rx_vlan_encap(skb);
452 if (priv->rx_ts_enabled)
453 cpts_rx_timestamp(cpts: cpsw->cpts, skb);
454 skb->protocol = eth_type_trans(skb, dev: ndev);
455
456 /* mark skb for recycling */
457 skb_mark_for_recycle(skb);
458 netif_receive_skb(skb);
459
460 ndev->stats.rx_bytes += len;
461 ndev->stats.rx_packets++;
462
463requeue:
464 xmeta = page_address(new_page) + CPSW_XMETA_OFFSET;
465 xmeta->ndev = ndev;
466 xmeta->ch = ch;
467
468 dma = page_pool_get_dma_addr(page: new_page) + CPSW_HEADROOM_NA;
469 ret = cpdma_chan_submit_mapped(chan: cpsw->rxv[ch].ch, token: new_page, data: dma,
470 len: pkt_size, directed: 0);
471 if (ret < 0) {
472 WARN_ON(ret == -ENOMEM);
473 page_pool_recycle_direct(pool, page: new_page);
474 }
475}
476
477static void _cpsw_adjust_link(struct cpsw_slave *slave,
478 struct cpsw_priv *priv, bool *link)
479{
480 struct phy_device *phy = slave->phy;
481 u32 mac_control = 0;
482 u32 slave_port;
483 struct cpsw_common *cpsw = priv->cpsw;
484
485 if (!phy)
486 return;
487
488 slave_port = cpsw_get_slave_port(slave_num: slave->slave_num);
489
490 if (phy->link) {
491 mac_control = CPSW_SL_CTL_GMII_EN;
492
493 if (phy->speed == 1000)
494 mac_control |= CPSW_SL_CTL_GIG;
495 if (phy->duplex)
496 mac_control |= CPSW_SL_CTL_FULLDUPLEX;
497
498 /* set speed_in input in case RMII mode is used in 100Mbps */
499 if (phy->speed == 100)
500 mac_control |= CPSW_SL_CTL_IFCTL_A;
501 /* in band mode only works in 10Mbps RGMII mode */
502 else if ((phy->speed == 10) && phy_interface_is_rgmii(phydev: phy))
503 mac_control |= CPSW_SL_CTL_EXT_EN; /* In Band mode */
504
505 if (priv->rx_pause)
506 mac_control |= CPSW_SL_CTL_RX_FLOW_EN;
507
508 if (priv->tx_pause)
509 mac_control |= CPSW_SL_CTL_TX_FLOW_EN;
510
511 if (mac_control != slave->mac_control)
512 cpsw_sl_ctl_set(sl: slave->mac_sl, ctl_funcs: mac_control);
513
514 /* enable forwarding */
515 cpsw_ale_control_set(ale: cpsw->ale, port: slave_port,
516 control: ALE_PORT_STATE, value: ALE_PORT_STATE_FORWARD);
517
518 *link = true;
519
520 if (priv->shp_cfg_speed &&
521 priv->shp_cfg_speed != slave->phy->speed &&
522 !cpsw_shp_is_off(priv))
523 dev_warn(priv->dev,
524 "Speed was changed, CBS shaper speeds are changed!");
525 } else {
526 mac_control = 0;
527 /* disable forwarding */
528 cpsw_ale_control_set(ale: cpsw->ale, port: slave_port,
529 control: ALE_PORT_STATE, value: ALE_PORT_STATE_DISABLE);
530
531 cpsw_sl_wait_for_idle(sl: slave->mac_sl, tmo: 100);
532
533 cpsw_sl_ctl_reset(sl: slave->mac_sl);
534 }
535
536 if (mac_control != slave->mac_control)
537 phy_print_status(phydev: phy);
538
539 slave->mac_control = mac_control;
540}
541
542static void cpsw_adjust_link(struct net_device *ndev)
543{
544 struct cpsw_priv *priv = netdev_priv(dev: ndev);
545 struct cpsw_common *cpsw = priv->cpsw;
546 bool link = false;
547
548 for_each_slave(priv, _cpsw_adjust_link, priv, &link);
549
550 if (link) {
551 if (cpsw_need_resplit(cpsw))
552 cpsw_split_res(cpsw);
553
554 netif_carrier_on(dev: ndev);
555 if (netif_running(dev: ndev))
556 netif_tx_wake_all_queues(dev: ndev);
557 } else {
558 netif_carrier_off(dev: ndev);
559 netif_tx_stop_all_queues(dev: ndev);
560 }
561}
562
563static inline void cpsw_add_dual_emac_def_ale_entries(
564 struct cpsw_priv *priv, struct cpsw_slave *slave,
565 u32 slave_port)
566{
567 struct cpsw_common *cpsw = priv->cpsw;
568 u32 port_mask = 1 << slave_port | ALE_PORT_HOST;
569
570 if (cpsw->version == CPSW_VERSION_1)
571 slave_write(slave, val: slave->port_vlan, CPSW1_PORT_VLAN);
572 else
573 slave_write(slave, val: slave->port_vlan, CPSW2_PORT_VLAN);
574 cpsw_ale_add_vlan(ale: cpsw->ale, vid: slave->port_vlan, port: port_mask,
575 untag: port_mask, reg_mcast: port_mask, unreg_mcast: 0);
576 cpsw_ale_add_mcast(ale: cpsw->ale, addr: priv->ndev->broadcast,
577 ALE_PORT_HOST, ALE_VLAN, vid: slave->port_vlan, mcast_state: 0);
578 cpsw_ale_add_ucast(ale: cpsw->ale, addr: priv->mac_addr,
579 HOST_PORT_NUM, ALE_VLAN |
580 ALE_SECURE, vid: slave->port_vlan);
581 cpsw_ale_control_set(ale: cpsw->ale, port: slave_port,
582 control: ALE_PORT_DROP_UNKNOWN_VLAN, value: 1);
583}
584
585static void cpsw_slave_open(struct cpsw_slave *slave, struct cpsw_priv *priv)
586{
587 u32 slave_port;
588 struct phy_device *phy;
589 struct cpsw_common *cpsw = priv->cpsw;
590
591 cpsw_sl_reset(sl: slave->mac_sl, tmo: 100);
592 cpsw_sl_ctl_reset(sl: slave->mac_sl);
593
594 /* setup priority mapping */
595 cpsw_sl_reg_write(sl: slave->mac_sl, reg: CPSW_SL_RX_PRI_MAP,
596 RX_PRIORITY_MAPPING);
597
598 switch (cpsw->version) {
599 case CPSW_VERSION_1:
600 slave_write(slave, TX_PRIORITY_MAPPING, CPSW1_TX_PRI_MAP);
601 /* Increase RX FIFO size to 5 for supporting fullduplex
602 * flow control mode
603 */
604 slave_write(slave,
605 val: (CPSW_MAX_BLKS_TX << CPSW_MAX_BLKS_TX_SHIFT) |
606 CPSW_MAX_BLKS_RX, CPSW1_MAX_BLKS);
607 break;
608 case CPSW_VERSION_2:
609 case CPSW_VERSION_3:
610 case CPSW_VERSION_4:
611 slave_write(slave, TX_PRIORITY_MAPPING, CPSW2_TX_PRI_MAP);
612 /* Increase RX FIFO size to 5 for supporting fullduplex
613 * flow control mode
614 */
615 slave_write(slave,
616 val: (CPSW_MAX_BLKS_TX << CPSW_MAX_BLKS_TX_SHIFT) |
617 CPSW_MAX_BLKS_RX, CPSW2_MAX_BLKS);
618 break;
619 }
620
621 /* setup max packet size, and mac address */
622 cpsw_sl_reg_write(sl: slave->mac_sl, reg: CPSW_SL_RX_MAXLEN,
623 val: cpsw->rx_packet_max);
624 cpsw_set_slave_mac(slave, priv);
625
626 slave->mac_control = 0; /* no link yet */
627
628 slave_port = cpsw_get_slave_port(slave_num: slave->slave_num);
629
630 if (cpsw->data.dual_emac)
631 cpsw_add_dual_emac_def_ale_entries(priv, slave, slave_port);
632 else
633 cpsw_ale_add_mcast(ale: cpsw->ale, addr: priv->ndev->broadcast,
634 port_mask: 1 << slave_port, flags: 0, vid: 0, ALE_MCAST_FWD_2);
635
636 if (slave->data->phy_node) {
637 phy = of_phy_connect(dev: priv->ndev, phy_np: slave->data->phy_node,
638 hndlr: &cpsw_adjust_link, flags: 0, iface: slave->data->phy_if);
639 if (!phy) {
640 dev_err(priv->dev, "phy \"%pOF\" not found on slave %d\n",
641 slave->data->phy_node,
642 slave->slave_num);
643 return;
644 }
645 } else {
646 phy = phy_connect(dev: priv->ndev, bus_id: slave->data->phy_id,
647 handler: &cpsw_adjust_link, interface: slave->data->phy_if);
648 if (IS_ERR(ptr: phy)) {
649 dev_err(priv->dev,
650 "phy \"%s\" not found on slave %d, err %ld\n",
651 slave->data->phy_id, slave->slave_num,
652 PTR_ERR(phy));
653 return;
654 }
655 }
656
657 phy->mac_managed_pm = true;
658
659 slave->phy = phy;
660
661 phy_disable_eee(phydev: slave->phy);
662
663 phy_attached_info(phydev: slave->phy);
664
665 phy_start(phydev: slave->phy);
666
667 /* Configure GMII_SEL register */
668 if (!IS_ERR(ptr: slave->data->ifphy))
669 phy_set_mode_ext(phy: slave->data->ifphy, mode: PHY_MODE_ETHERNET,
670 submode: slave->data->phy_if);
671 else
672 cpsw_phy_sel(dev: cpsw->dev, phy_mode: slave->phy->interface,
673 slave: slave->slave_num);
674}
675
676static inline void cpsw_add_default_vlan(struct cpsw_priv *priv)
677{
678 struct cpsw_common *cpsw = priv->cpsw;
679 const int vlan = cpsw->data.default_vlan;
680 u32 reg;
681 int i;
682 int unreg_mcast_mask;
683
684 reg = (cpsw->version == CPSW_VERSION_1) ? CPSW1_PORT_VLAN :
685 CPSW2_PORT_VLAN;
686
687 writel(val: vlan, addr: &cpsw->host_port_regs->port_vlan);
688
689 for (i = 0; i < cpsw->data.slaves; i++)
690 slave_write(slave: cpsw->slaves + i, val: vlan, offset: reg);
691
692 if (priv->ndev->flags & IFF_ALLMULTI)
693 unreg_mcast_mask = ALE_ALL_PORTS;
694 else
695 unreg_mcast_mask = ALE_PORT_1 | ALE_PORT_2;
696
697 cpsw_ale_add_vlan(ale: cpsw->ale, vid: vlan, ALE_ALL_PORTS,
698 ALE_ALL_PORTS, ALE_ALL_PORTS,
699 unreg_mcast: unreg_mcast_mask);
700}
701
702static void cpsw_init_host_port(struct cpsw_priv *priv)
703{
704 u32 fifo_mode;
705 u32 control_reg;
706 struct cpsw_common *cpsw = priv->cpsw;
707
708 /* soft reset the controller and initialize ale */
709 soft_reset(module: "cpsw", reg: &cpsw->regs->soft_reset);
710 cpsw_ale_start(ale: cpsw->ale);
711
712 /* switch to vlan aware mode */
713 cpsw_ale_control_set(ale: cpsw->ale, HOST_PORT_NUM, control: ALE_VLAN_AWARE,
714 CPSW_ALE_VLAN_AWARE);
715 control_reg = readl(addr: &cpsw->regs->control);
716 control_reg |= CPSW_VLAN_AWARE | CPSW_RX_VLAN_ENCAP;
717 writel(val: control_reg, addr: &cpsw->regs->control);
718 fifo_mode = (cpsw->data.dual_emac) ? CPSW_FIFO_DUAL_MAC_MODE :
719 CPSW_FIFO_NORMAL_MODE;
720 writel(val: fifo_mode, addr: &cpsw->host_port_regs->tx_in_ctl);
721
722 /* setup host port priority mapping */
723 writel_relaxed(CPDMA_TX_PRIORITY_MAP,
724 &cpsw->host_port_regs->cpdma_tx_pri_map);
725 writel_relaxed(0, &cpsw->host_port_regs->cpdma_rx_chan_map);
726
727 cpsw_ale_control_set(ale: cpsw->ale, HOST_PORT_NUM,
728 control: ALE_PORT_STATE, value: ALE_PORT_STATE_FORWARD);
729
730 if (!cpsw->data.dual_emac) {
731 cpsw_ale_add_ucast(ale: cpsw->ale, addr: priv->mac_addr, HOST_PORT_NUM,
732 flags: 0, vid: 0);
733 cpsw_ale_add_mcast(ale: cpsw->ale, addr: priv->ndev->broadcast,
734 ALE_PORT_HOST, flags: 0, vid: 0, ALE_MCAST_FWD_2);
735 }
736}
737
738static void cpsw_slave_stop(struct cpsw_slave *slave, struct cpsw_common *cpsw)
739{
740 u32 slave_port;
741
742 slave_port = cpsw_get_slave_port(slave_num: slave->slave_num);
743
744 if (!slave->phy)
745 return;
746 phy_stop(phydev: slave->phy);
747 phy_disconnect(phydev: slave->phy);
748 slave->phy = NULL;
749 cpsw_ale_control_set(ale: cpsw->ale, port: slave_port,
750 control: ALE_PORT_STATE, value: ALE_PORT_STATE_DISABLE);
751 cpsw_sl_reset(sl: slave->mac_sl, tmo: 100);
752 cpsw_sl_ctl_reset(sl: slave->mac_sl);
753}
754
755static int cpsw_restore_vlans(struct net_device *vdev, int vid, void *arg)
756{
757 struct cpsw_priv *priv = arg;
758
759 if (!vdev)
760 return 0;
761
762 cpsw_ndo_vlan_rx_add_vid(ndev: priv->ndev, proto: 0, vid);
763 return 0;
764}
765
766/* restore resources after port reset */
767static void cpsw_restore(struct cpsw_priv *priv)
768{
769 /* restore vlan configurations */
770 vlan_for_each(dev: priv->ndev, action: cpsw_restore_vlans, arg: priv);
771
772 /* restore MQPRIO offload */
773 for_each_slave(priv, cpsw_mqprio_resume, priv);
774
775 /* restore CBS offload */
776 for_each_slave(priv, cpsw_cbs_resume, priv);
777}
778
779static int cpsw_ndo_open(struct net_device *ndev)
780{
781 struct cpsw_priv *priv = netdev_priv(dev: ndev);
782 struct cpsw_common *cpsw = priv->cpsw;
783 int ret;
784 u32 reg;
785
786 ret = pm_runtime_resume_and_get(dev: cpsw->dev);
787 if (ret < 0)
788 return ret;
789
790 netif_carrier_off(dev: ndev);
791
792 /* Notify the stack of the actual queue counts. */
793 ret = netif_set_real_num_tx_queues(dev: ndev, txq: cpsw->tx_ch_num);
794 if (ret) {
795 dev_err(priv->dev, "cannot set real number of tx queues\n");
796 goto err_cleanup;
797 }
798
799 ret = netif_set_real_num_rx_queues(dev: ndev, rxq: cpsw->rx_ch_num);
800 if (ret) {
801 dev_err(priv->dev, "cannot set real number of rx queues\n");
802 goto err_cleanup;
803 }
804
805 reg = cpsw->version;
806
807 dev_info(priv->dev, "initializing cpsw version %d.%d (%d)\n",
808 CPSW_MAJOR_VERSION(reg), CPSW_MINOR_VERSION(reg),
809 CPSW_RTL_VERSION(reg));
810
811 /* Initialize host and slave ports */
812 if (!cpsw->usage_count)
813 cpsw_init_host_port(priv);
814 for_each_slave(priv, cpsw_slave_open, priv);
815
816 /* Add default VLAN */
817 if (!cpsw->data.dual_emac)
818 cpsw_add_default_vlan(priv);
819 else
820 cpsw_ale_add_vlan(ale: cpsw->ale, vid: cpsw->data.default_vlan,
821 ALE_ALL_PORTS, ALE_ALL_PORTS, reg_mcast: 0, unreg_mcast: 0);
822
823 /* initialize shared resources for every ndev */
824 if (!cpsw->usage_count) {
825 /* disable priority elevation */
826 writel_relaxed(0, &cpsw->regs->ptype);
827
828 /* enable statistics collection only on all ports */
829 writel_relaxed(0x7, &cpsw->regs->stat_port_en);
830
831 /* Enable internal fifo flow control */
832 writel(val: 0x7, addr: &cpsw->regs->flow_control);
833
834 napi_enable(n: &cpsw->napi_rx);
835 napi_enable(n: &cpsw->napi_tx);
836
837 if (cpsw->tx_irq_disabled) {
838 cpsw->tx_irq_disabled = false;
839 enable_irq(irq: cpsw->irqs_table[1]);
840 }
841
842 if (cpsw->rx_irq_disabled) {
843 cpsw->rx_irq_disabled = false;
844 enable_irq(irq: cpsw->irqs_table[0]);
845 }
846
847 /* create rxqs for both infs in dual mac as they use same pool
848 * and must be destroyed together when no users.
849 */
850 ret = cpsw_create_xdp_rxqs(cpsw);
851 if (ret < 0)
852 goto err_cleanup;
853
854 ret = cpsw_fill_rx_channels(priv);
855 if (ret < 0)
856 goto err_cleanup;
857
858 if (cpsw->cpts) {
859 if (cpts_register(cpts: cpsw->cpts))
860 dev_err(priv->dev, "error registering cpts device\n");
861 else
862 writel(val: 0x10, addr: &cpsw->wr_regs->misc_en);
863 }
864 }
865
866 cpsw_restore(priv);
867
868 /* Enable Interrupt pacing if configured */
869 if (cpsw->coal_intvl != 0) {
870 struct ethtool_coalesce coal;
871
872 coal.rx_coalesce_usecs = cpsw->coal_intvl;
873 cpsw_set_coalesce(ndev, coal: &coal, NULL, NULL);
874 }
875
876 cpdma_ctlr_start(ctlr: cpsw->dma);
877 cpsw_intr_enable(cpsw);
878 cpsw->usage_count++;
879
880 return 0;
881
882err_cleanup:
883 if (!cpsw->usage_count) {
884 napi_disable(n: &cpsw->napi_rx);
885 napi_disable(n: &cpsw->napi_tx);
886 cpdma_ctlr_stop(ctlr: cpsw->dma);
887 cpsw_destroy_xdp_rxqs(cpsw);
888 }
889
890 for_each_slave(priv, cpsw_slave_stop, cpsw);
891 pm_runtime_put_sync(dev: cpsw->dev);
892 netif_carrier_off(dev: priv->ndev);
893 return ret;
894}
895
896static int cpsw_ndo_stop(struct net_device *ndev)
897{
898 struct cpsw_priv *priv = netdev_priv(dev: ndev);
899 struct cpsw_common *cpsw = priv->cpsw;
900
901 cpsw_info(priv, ifdown, "shutting down cpsw device\n");
902 __hw_addr_ref_unsync_dev(list: &ndev->mc, dev: ndev, unsync: cpsw_purge_all_mc);
903 netif_tx_stop_all_queues(dev: priv->ndev);
904 netif_carrier_off(dev: priv->ndev);
905
906 if (cpsw->usage_count <= 1) {
907 napi_disable(n: &cpsw->napi_rx);
908 napi_disable(n: &cpsw->napi_tx);
909 cpts_unregister(cpts: cpsw->cpts);
910 cpsw_intr_disable(cpsw);
911 cpdma_ctlr_stop(ctlr: cpsw->dma);
912 cpsw_ale_stop(ale: cpsw->ale);
913 cpsw_destroy_xdp_rxqs(cpsw);
914 }
915 for_each_slave(priv, cpsw_slave_stop, cpsw);
916
917 if (cpsw_need_resplit(cpsw))
918 cpsw_split_res(cpsw);
919
920 cpsw->usage_count--;
921 pm_runtime_put_sync(dev: cpsw->dev);
922 return 0;
923}
924
925static netdev_tx_t cpsw_ndo_start_xmit(struct sk_buff *skb,
926 struct net_device *ndev)
927{
928 struct cpsw_priv *priv = netdev_priv(dev: ndev);
929 struct cpsw_common *cpsw = priv->cpsw;
930 struct cpts *cpts = cpsw->cpts;
931 struct netdev_queue *txq;
932 struct cpdma_chan *txch;
933 int ret, q_idx;
934
935 if (skb_put_padto(skb, CPSW_MIN_PACKET_SIZE)) {
936 cpsw_err(priv, tx_err, "packet pad failed\n");
937 ndev->stats.tx_dropped++;
938 return NET_XMIT_DROP;
939 }
940
941 if (skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP &&
942 priv->tx_ts_enabled && cpts_can_timestamp(cpts, skb))
943 skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS;
944
945 q_idx = skb_get_queue_mapping(skb);
946 if (q_idx >= cpsw->tx_ch_num)
947 q_idx = q_idx % cpsw->tx_ch_num;
948
949 txch = cpsw->txv[q_idx].ch;
950 txq = netdev_get_tx_queue(dev: ndev, index: q_idx);
951 skb_tx_timestamp(skb);
952 ret = cpdma_chan_submit(chan: txch, token: skb, data: skb->data, len: skb->len,
953 directed: priv->emac_port + cpsw->data.dual_emac);
954 if (unlikely(ret != 0)) {
955 cpsw_err(priv, tx_err, "desc submit failed\n");
956 goto fail;
957 }
958
959 /* If there is no more tx desc left free then we need to
960 * tell the kernel to stop sending us tx frames.
961 */
962 if (unlikely(!cpdma_check_free_tx_desc(txch))) {
963 netif_tx_stop_queue(dev_queue: txq);
964
965 /* Barrier, so that stop_queue visible to other cpus */
966 smp_mb__after_atomic();
967
968 if (cpdma_check_free_tx_desc(chan: txch))
969 netif_tx_wake_queue(dev_queue: txq);
970 }
971
972 return NETDEV_TX_OK;
973fail:
974 ndev->stats.tx_dropped++;
975 netif_tx_stop_queue(dev_queue: txq);
976
977 /* Barrier, so that stop_queue visible to other cpus */
978 smp_mb__after_atomic();
979
980 if (cpdma_check_free_tx_desc(chan: txch))
981 netif_tx_wake_queue(dev_queue: txq);
982
983 return NETDEV_TX_BUSY;
984}
985
986static int cpsw_ndo_set_mac_address(struct net_device *ndev, void *p)
987{
988 struct cpsw_priv *priv = netdev_priv(dev: ndev);
989 struct sockaddr *addr = (struct sockaddr *)p;
990 struct cpsw_common *cpsw = priv->cpsw;
991 int flags = 0;
992 u16 vid = 0;
993 int ret;
994
995 if (!is_valid_ether_addr(addr: addr->sa_data))
996 return -EADDRNOTAVAIL;
997
998 ret = pm_runtime_resume_and_get(dev: cpsw->dev);
999 if (ret < 0)
1000 return ret;
1001
1002 if (cpsw->data.dual_emac) {
1003 vid = cpsw->slaves[priv->emac_port].port_vlan;
1004 flags = ALE_VLAN;
1005 }
1006
1007 cpsw_ale_del_ucast(ale: cpsw->ale, addr: priv->mac_addr, HOST_PORT_NUM,
1008 flags, vid);
1009 cpsw_ale_add_ucast(ale: cpsw->ale, addr: addr->sa_data, HOST_PORT_NUM,
1010 flags, vid);
1011
1012 memcpy(priv->mac_addr, addr->sa_data, ETH_ALEN);
1013 eth_hw_addr_set(dev: ndev, addr: priv->mac_addr);
1014 for_each_slave(priv, cpsw_set_slave_mac, priv);
1015
1016 pm_runtime_put(dev: cpsw->dev);
1017
1018 return 0;
1019}
1020
1021static inline int cpsw_add_vlan_ale_entry(struct cpsw_priv *priv,
1022 unsigned short vid)
1023{
1024 int ret;
1025 int unreg_mcast_mask = 0;
1026 int mcast_mask;
1027 u32 port_mask;
1028 struct cpsw_common *cpsw = priv->cpsw;
1029
1030 if (cpsw->data.dual_emac) {
1031 port_mask = (1 << (priv->emac_port + 1)) | ALE_PORT_HOST;
1032
1033 mcast_mask = ALE_PORT_HOST;
1034 if (priv->ndev->flags & IFF_ALLMULTI)
1035 unreg_mcast_mask = mcast_mask;
1036 } else {
1037 port_mask = ALE_ALL_PORTS;
1038 mcast_mask = port_mask;
1039
1040 if (priv->ndev->flags & IFF_ALLMULTI)
1041 unreg_mcast_mask = ALE_ALL_PORTS;
1042 else
1043 unreg_mcast_mask = ALE_PORT_1 | ALE_PORT_2;
1044 }
1045
1046 ret = cpsw_ale_add_vlan(ale: cpsw->ale, vid, port: port_mask, untag: 0, reg_mcast: port_mask,
1047 unreg_mcast: unreg_mcast_mask);
1048 if (ret != 0)
1049 return ret;
1050
1051 ret = cpsw_ale_add_ucast(ale: cpsw->ale, addr: priv->mac_addr,
1052 HOST_PORT_NUM, ALE_VLAN, vid);
1053 if (ret != 0)
1054 goto clean_vid;
1055
1056 ret = cpsw_ale_add_mcast(ale: cpsw->ale, addr: priv->ndev->broadcast,
1057 port_mask: mcast_mask, ALE_VLAN, vid, mcast_state: 0);
1058 if (ret != 0)
1059 goto clean_vlan_ucast;
1060 return 0;
1061
1062clean_vlan_ucast:
1063 cpsw_ale_del_ucast(ale: cpsw->ale, addr: priv->mac_addr,
1064 HOST_PORT_NUM, ALE_VLAN, vid);
1065clean_vid:
1066 cpsw_ale_del_vlan(ale: cpsw->ale, vid, port: 0);
1067 return ret;
1068}
1069
1070static int cpsw_ndo_vlan_rx_add_vid(struct net_device *ndev,
1071 __be16 proto, u16 vid)
1072{
1073 struct cpsw_priv *priv = netdev_priv(dev: ndev);
1074 struct cpsw_common *cpsw = priv->cpsw;
1075 int ret;
1076
1077 if (vid == cpsw->data.default_vlan)
1078 return 0;
1079
1080 ret = pm_runtime_resume_and_get(dev: cpsw->dev);
1081 if (ret < 0)
1082 return ret;
1083
1084 if (cpsw->data.dual_emac) {
1085 /* In dual EMAC, reserved VLAN id should not be used for
1086 * creating VLAN interfaces as this can break the dual
1087 * EMAC port separation
1088 */
1089 int i;
1090
1091 for (i = 0; i < cpsw->data.slaves; i++) {
1092 if (vid == cpsw->slaves[i].port_vlan) {
1093 ret = -EINVAL;
1094 goto err;
1095 }
1096 }
1097 }
1098
1099 dev_info(priv->dev, "Adding vlanid %d to vlan filter\n", vid);
1100 ret = cpsw_add_vlan_ale_entry(priv, vid);
1101err:
1102 pm_runtime_put(dev: cpsw->dev);
1103 return ret;
1104}
1105
1106static int cpsw_ndo_vlan_rx_kill_vid(struct net_device *ndev,
1107 __be16 proto, u16 vid)
1108{
1109 struct cpsw_priv *priv = netdev_priv(dev: ndev);
1110 struct cpsw_common *cpsw = priv->cpsw;
1111 int ret;
1112
1113 if (vid == cpsw->data.default_vlan)
1114 return 0;
1115
1116 ret = pm_runtime_resume_and_get(dev: cpsw->dev);
1117 if (ret < 0)
1118 return ret;
1119
1120 if (cpsw->data.dual_emac) {
1121 int i;
1122
1123 for (i = 0; i < cpsw->data.slaves; i++) {
1124 if (vid == cpsw->slaves[i].port_vlan)
1125 goto err;
1126 }
1127 }
1128
1129 dev_info(priv->dev, "removing vlanid %d from vlan filter\n", vid);
1130 ret = cpsw_ale_del_vlan(ale: cpsw->ale, vid, port: 0);
1131 ret |= cpsw_ale_del_ucast(ale: cpsw->ale, addr: priv->mac_addr,
1132 HOST_PORT_NUM, ALE_VLAN, vid);
1133 ret |= cpsw_ale_del_mcast(ale: cpsw->ale, addr: priv->ndev->broadcast,
1134 port_mask: 0, ALE_VLAN, vid);
1135 ret |= cpsw_ale_flush_multicast(ale: cpsw->ale, ALE_PORT_HOST, vid);
1136err:
1137 pm_runtime_put(dev: cpsw->dev);
1138 return ret;
1139}
1140
1141static int cpsw_ndo_xdp_xmit(struct net_device *ndev, int n,
1142 struct xdp_frame **frames, u32 flags)
1143{
1144 struct cpsw_priv *priv = netdev_priv(dev: ndev);
1145 struct cpsw_common *cpsw = priv->cpsw;
1146 struct xdp_frame *xdpf;
1147 int i, nxmit = 0, port;
1148
1149 if (unlikely(flags & ~XDP_XMIT_FLAGS_MASK))
1150 return -EINVAL;
1151
1152 for (i = 0; i < n; i++) {
1153 xdpf = frames[i];
1154 if (xdpf->len < CPSW_MIN_PACKET_SIZE)
1155 break;
1156
1157 port = priv->emac_port + cpsw->data.dual_emac;
1158 if (cpsw_xdp_tx_frame(priv, xdpf, NULL, port))
1159 break;
1160 nxmit++;
1161 }
1162
1163 return nxmit;
1164}
1165
1166#ifdef CONFIG_NET_POLL_CONTROLLER
1167static void cpsw_ndo_poll_controller(struct net_device *ndev)
1168{
1169 struct cpsw_common *cpsw = ndev_to_cpsw(ndev);
1170
1171 cpsw_intr_disable(cpsw);
1172 cpsw_rx_interrupt(irq: cpsw->irqs_table[0], dev_id: cpsw);
1173 cpsw_tx_interrupt(irq: cpsw->irqs_table[1], dev_id: cpsw);
1174 cpsw_intr_enable(cpsw);
1175}
1176#endif
1177
1178/* We need a custom implementation of phy_do_ioctl_running() because in switch
1179 * mode, dev->phydev may be different than the phy of the active_slave. We need
1180 * to operate on the locally saved phy instead.
1181 */
1182static int cpsw_ndo_ioctl(struct net_device *dev, struct ifreq *req, int cmd)
1183{
1184 struct cpsw_priv *priv = netdev_priv(dev);
1185 struct cpsw_common *cpsw = priv->cpsw;
1186 int slave_no = cpsw_slave_index(cpsw, priv);
1187 struct phy_device *phy;
1188
1189 if (!netif_running(dev))
1190 return -EINVAL;
1191
1192 phy = cpsw->slaves[slave_no].phy;
1193 if (phy)
1194 return phy_mii_ioctl(phydev: phy, ifr: req, cmd);
1195
1196 return -EOPNOTSUPP;
1197}
1198
1199static const struct net_device_ops cpsw_netdev_ops = {
1200 .ndo_open = cpsw_ndo_open,
1201 .ndo_stop = cpsw_ndo_stop,
1202 .ndo_start_xmit = cpsw_ndo_start_xmit,
1203 .ndo_set_mac_address = cpsw_ndo_set_mac_address,
1204 .ndo_eth_ioctl = cpsw_ndo_ioctl,
1205 .ndo_validate_addr = eth_validate_addr,
1206 .ndo_tx_timeout = cpsw_ndo_tx_timeout,
1207 .ndo_set_rx_mode = cpsw_ndo_set_rx_mode,
1208 .ndo_set_tx_maxrate = cpsw_ndo_set_tx_maxrate,
1209#ifdef CONFIG_NET_POLL_CONTROLLER
1210 .ndo_poll_controller = cpsw_ndo_poll_controller,
1211#endif
1212 .ndo_vlan_rx_add_vid = cpsw_ndo_vlan_rx_add_vid,
1213 .ndo_vlan_rx_kill_vid = cpsw_ndo_vlan_rx_kill_vid,
1214 .ndo_setup_tc = cpsw_ndo_setup_tc,
1215 .ndo_bpf = cpsw_ndo_bpf,
1216 .ndo_xdp_xmit = cpsw_ndo_xdp_xmit,
1217 .ndo_hwtstamp_get = cpsw_hwtstamp_get,
1218 .ndo_hwtstamp_set = cpsw_hwtstamp_set,
1219};
1220
1221static void cpsw_get_drvinfo(struct net_device *ndev,
1222 struct ethtool_drvinfo *info)
1223{
1224 struct cpsw_common *cpsw = ndev_to_cpsw(ndev);
1225 struct platform_device *pdev = to_platform_device(cpsw->dev);
1226
1227 strscpy(info->driver, "cpsw", sizeof(info->driver));
1228 strscpy(info->version, "1.0", sizeof(info->version));
1229 strscpy(info->bus_info, pdev->name, sizeof(info->bus_info));
1230}
1231
1232static int cpsw_set_pauseparam(struct net_device *ndev,
1233 struct ethtool_pauseparam *pause)
1234{
1235 struct cpsw_priv *priv = netdev_priv(dev: ndev);
1236 bool link;
1237
1238 priv->rx_pause = pause->rx_pause ? true : false;
1239 priv->tx_pause = pause->tx_pause ? true : false;
1240
1241 for_each_slave(priv, _cpsw_adjust_link, priv, &link);
1242 return 0;
1243}
1244
1245static int cpsw_set_channels(struct net_device *ndev,
1246 struct ethtool_channels *chs)
1247{
1248 return cpsw_set_channels_common(ndev, chs, rx_handler: cpsw_rx_handler);
1249}
1250
1251static const struct ethtool_ops cpsw_ethtool_ops = {
1252 .supported_coalesce_params = ETHTOOL_COALESCE_RX_USECS,
1253 .get_drvinfo = cpsw_get_drvinfo,
1254 .get_msglevel = cpsw_get_msglevel,
1255 .set_msglevel = cpsw_set_msglevel,
1256 .get_link = ethtool_op_get_link,
1257 .get_ts_info = cpsw_get_ts_info,
1258 .get_coalesce = cpsw_get_coalesce,
1259 .set_coalesce = cpsw_set_coalesce,
1260 .get_sset_count = cpsw_get_sset_count,
1261 .get_strings = cpsw_get_strings,
1262 .get_ethtool_stats = cpsw_get_ethtool_stats,
1263 .get_pauseparam = cpsw_get_pauseparam,
1264 .set_pauseparam = cpsw_set_pauseparam,
1265 .get_wol = cpsw_get_wol,
1266 .set_wol = cpsw_set_wol,
1267 .get_regs_len = cpsw_get_regs_len,
1268 .get_regs = cpsw_get_regs,
1269 .begin = cpsw_ethtool_op_begin,
1270 .complete = cpsw_ethtool_op_complete,
1271 .get_channels = cpsw_get_channels,
1272 .set_channels = cpsw_set_channels,
1273 .get_link_ksettings = cpsw_get_link_ksettings,
1274 .set_link_ksettings = cpsw_set_link_ksettings,
1275 .get_eee = cpsw_get_eee,
1276 .nway_reset = cpsw_nway_reset,
1277 .get_ringparam = cpsw_get_ringparam,
1278 .set_ringparam = cpsw_set_ringparam,
1279};
1280
1281static int cpsw_probe_dt(struct cpsw_platform_data *data,
1282 struct platform_device *pdev)
1283{
1284 struct device_node *node = pdev->dev.of_node;
1285 struct device_node *slave_node;
1286 int i = 0, ret;
1287 u32 prop;
1288
1289 if (!node)
1290 return -EINVAL;
1291
1292 if (of_property_read_u32(np: node, propname: "slaves", out_value: &prop)) {
1293 dev_err(&pdev->dev, "Missing slaves property in the DT.\n");
1294 return -EINVAL;
1295 }
1296 data->slaves = prop;
1297
1298 if (of_property_read_u32(np: node, propname: "active_slave", out_value: &prop)) {
1299 dev_err(&pdev->dev, "Missing active_slave property in the DT.\n");
1300 return -EINVAL;
1301 }
1302 data->active_slave = prop;
1303
1304 data->slave_data = devm_kcalloc(dev: &pdev->dev,
1305 n: data->slaves,
1306 size: sizeof(struct cpsw_slave_data),
1307 GFP_KERNEL);
1308 if (!data->slave_data)
1309 return -ENOMEM;
1310
1311 if (of_property_read_u32(np: node, propname: "cpdma_channels", out_value: &prop)) {
1312 dev_err(&pdev->dev, "Missing cpdma_channels property in the DT.\n");
1313 return -EINVAL;
1314 }
1315 data->channels = prop;
1316
1317 if (of_property_read_u32(np: node, propname: "bd_ram_size", out_value: &prop)) {
1318 dev_err(&pdev->dev, "Missing bd_ram_size property in the DT.\n");
1319 return -EINVAL;
1320 }
1321 data->bd_ram_size = prop;
1322
1323 if (of_property_read_u32(np: node, propname: "mac_control", out_value: &prop)) {
1324 dev_err(&pdev->dev, "Missing mac_control property in the DT.\n");
1325 return -EINVAL;
1326 }
1327 data->mac_control = prop;
1328
1329 if (of_property_read_bool(np: node, propname: "dual_emac"))
1330 data->dual_emac = true;
1331
1332 /*
1333 * Populate all the child nodes here...
1334 */
1335 ret = of_platform_populate(root: node, NULL, NULL, parent: &pdev->dev);
1336 /* We do not want to force this, as in some cases may not have child */
1337 if (ret)
1338 dev_warn(&pdev->dev, "Doesn't have any child node\n");
1339
1340 for_each_available_child_of_node(node, slave_node) {
1341 struct cpsw_slave_data *slave_data = data->slave_data + i;
1342 int lenp;
1343 const __be32 *parp;
1344
1345 /* This is no slave child node, continue */
1346 if (!of_node_name_eq(np: slave_node, name: "slave"))
1347 continue;
1348
1349 slave_data->ifphy = devm_of_phy_get(dev: &pdev->dev, np: slave_node,
1350 NULL);
1351 if (!IS_ENABLED(CONFIG_TI_CPSW_PHY_SEL) &&
1352 IS_ERR(ptr: slave_data->ifphy)) {
1353 ret = PTR_ERR(ptr: slave_data->ifphy);
1354 dev_err(&pdev->dev,
1355 "%d: Error retrieving port phy: %d\n", i, ret);
1356 goto err_node_put;
1357 }
1358
1359 slave_data->slave_node = slave_node;
1360 slave_data->phy_node = of_parse_phandle(np: slave_node,
1361 phandle_name: "phy-handle", index: 0);
1362 parp = of_get_property(node: slave_node, name: "phy_id", lenp: &lenp);
1363 if (slave_data->phy_node) {
1364 dev_dbg(&pdev->dev,
1365 "slave[%d] using phy-handle=\"%pOF\"\n",
1366 i, slave_data->phy_node);
1367 } else if (of_phy_is_fixed_link(np: slave_node)) {
1368 /* In the case of a fixed PHY, the DT node associated
1369 * to the PHY is the Ethernet MAC DT node.
1370 */
1371 ret = of_phy_register_fixed_link(np: slave_node);
1372 if (ret) {
1373 dev_err_probe(dev: &pdev->dev, err: ret, fmt: "failed to register fixed-link phy\n");
1374 goto err_node_put;
1375 }
1376 slave_data->phy_node = of_node_get(node: slave_node);
1377 } else if (parp) {
1378 u32 phyid;
1379 struct device_node *mdio_node;
1380 struct platform_device *mdio;
1381
1382 if (lenp != (sizeof(__be32) * 2)) {
1383 dev_err(&pdev->dev, "Invalid slave[%d] phy_id property\n", i);
1384 goto no_phy_slave;
1385 }
1386 mdio_node = of_find_node_by_phandle(be32_to_cpup(p: parp));
1387 phyid = be32_to_cpup(p: parp+1);
1388 mdio = of_find_device_by_node(np: mdio_node);
1389 of_node_put(node: mdio_node);
1390 if (!mdio) {
1391 dev_err(&pdev->dev, "Missing mdio platform device\n");
1392 ret = -EINVAL;
1393 goto err_node_put;
1394 }
1395 snprintf(buf: slave_data->phy_id, size: sizeof(slave_data->phy_id),
1396 PHY_ID_FMT, mdio->name, phyid);
1397 put_device(dev: &mdio->dev);
1398 } else {
1399 dev_err(&pdev->dev,
1400 "No slave[%d] phy_id, phy-handle, or fixed-link property\n",
1401 i);
1402 goto no_phy_slave;
1403 }
1404 ret = of_get_phy_mode(np: slave_node, interface: &slave_data->phy_if);
1405 if (ret) {
1406 dev_err(&pdev->dev, "Missing or malformed slave[%d] phy-mode property\n",
1407 i);
1408 goto err_node_put;
1409 }
1410
1411no_phy_slave:
1412 ret = of_get_mac_address(np: slave_node, mac: slave_data->mac_addr);
1413 if (ret) {
1414 ret = ti_cm_get_macid(dev: &pdev->dev, slave: i,
1415 mac_addr: slave_data->mac_addr);
1416 if (ret)
1417 goto err_node_put;
1418 }
1419 if (data->dual_emac) {
1420 if (of_property_read_u32(np: slave_node, propname: "dual_emac_res_vlan",
1421 out_value: &prop)) {
1422 dev_err(&pdev->dev, "Missing dual_emac_res_vlan in DT.\n");
1423 slave_data->dual_emac_res_vlan = i+1;
1424 dev_err(&pdev->dev, "Using %d as Reserved VLAN for %d slave\n",
1425 slave_data->dual_emac_res_vlan, i);
1426 } else {
1427 slave_data->dual_emac_res_vlan = prop;
1428 }
1429 }
1430
1431 i++;
1432 if (i == data->slaves) {
1433 ret = 0;
1434 goto err_node_put;
1435 }
1436 }
1437
1438 return 0;
1439
1440err_node_put:
1441 of_node_put(node: slave_node);
1442 return ret;
1443}
1444
1445static void cpsw_remove_dt(struct platform_device *pdev)
1446{
1447 struct cpsw_common *cpsw = platform_get_drvdata(pdev);
1448 struct cpsw_platform_data *data = &cpsw->data;
1449 struct device_node *node = pdev->dev.of_node;
1450 struct device_node *slave_node;
1451 int i = 0;
1452
1453 for_each_available_child_of_node(node, slave_node) {
1454 struct cpsw_slave_data *slave_data = &data->slave_data[i];
1455
1456 if (!of_node_name_eq(np: slave_node, name: "slave"))
1457 continue;
1458
1459 if (of_phy_is_fixed_link(np: slave_node))
1460 of_phy_deregister_fixed_link(np: slave_node);
1461
1462 of_node_put(node: slave_data->phy_node);
1463
1464 i++;
1465 if (i == data->slaves) {
1466 of_node_put(node: slave_node);
1467 break;
1468 }
1469 }
1470
1471 of_platform_depopulate(parent: &pdev->dev);
1472}
1473
1474static int cpsw_probe_dual_emac(struct cpsw_priv *priv)
1475{
1476 struct cpsw_common *cpsw = priv->cpsw;
1477 struct cpsw_platform_data *data = &cpsw->data;
1478 struct net_device *ndev;
1479 struct cpsw_priv *priv_sl2;
1480 int ret = 0;
1481
1482 ndev = devm_alloc_etherdev_mqs(dev: cpsw->dev, sizeof_priv: sizeof(struct cpsw_priv),
1483 CPSW_MAX_QUEUES, CPSW_MAX_QUEUES);
1484 if (!ndev) {
1485 dev_err(cpsw->dev, "cpsw: error allocating net_device\n");
1486 return -ENOMEM;
1487 }
1488
1489 priv_sl2 = netdev_priv(dev: ndev);
1490 priv_sl2->cpsw = cpsw;
1491 priv_sl2->ndev = ndev;
1492 priv_sl2->dev = &ndev->dev;
1493 priv_sl2->msg_enable = netif_msg_init(debug_value: debug_level, CPSW_DEBUG);
1494 INIT_WORK(&priv_sl2->rx_mode_work, cpsw_ndo_set_rx_mode_work);
1495
1496 if (is_valid_ether_addr(addr: data->slave_data[1].mac_addr)) {
1497 memcpy(priv_sl2->mac_addr, data->slave_data[1].mac_addr,
1498 ETH_ALEN);
1499 dev_info(cpsw->dev, "cpsw: Detected MACID = %pM\n",
1500 priv_sl2->mac_addr);
1501 } else {
1502 eth_random_addr(addr: priv_sl2->mac_addr);
1503 dev_info(cpsw->dev, "cpsw: Random MACID = %pM\n",
1504 priv_sl2->mac_addr);
1505 }
1506 eth_hw_addr_set(dev: ndev, addr: priv_sl2->mac_addr);
1507
1508 priv_sl2->emac_port = 1;
1509 cpsw->slaves[1].ndev = ndev;
1510 ndev->features |= NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_HW_VLAN_CTAG_RX;
1511 ndev->xdp_features = NETDEV_XDP_ACT_BASIC | NETDEV_XDP_ACT_REDIRECT |
1512 NETDEV_XDP_ACT_NDO_XMIT;
1513
1514 ndev->netdev_ops = &cpsw_netdev_ops;
1515 ndev->ethtool_ops = &cpsw_ethtool_ops;
1516
1517 /* register the network device */
1518 SET_NETDEV_DEV(ndev, cpsw->dev);
1519 ndev->dev.of_node = cpsw->slaves[1].data->slave_node;
1520 ret = register_netdev(dev: ndev);
1521 if (ret)
1522 dev_err(cpsw->dev, "cpsw: error registering net device\n");
1523
1524 return ret;
1525}
1526
1527static const struct of_device_id cpsw_of_mtable[] = {
1528 { .compatible = "ti,cpsw"},
1529 { .compatible = "ti,am335x-cpsw"},
1530 { .compatible = "ti,am4372-cpsw"},
1531 { .compatible = "ti,dra7-cpsw"},
1532 { /* sentinel */ },
1533};
1534MODULE_DEVICE_TABLE(of, cpsw_of_mtable);
1535
1536static const struct soc_device_attribute cpsw_soc_devices[] = {
1537 { .family = "AM33xx", .revision = "ES1.0"},
1538 { /* sentinel */ }
1539};
1540
1541static int cpsw_probe(struct platform_device *pdev)
1542{
1543 struct device *dev = &pdev->dev;
1544 struct clk *clk;
1545 struct cpsw_platform_data *data;
1546 struct net_device *ndev;
1547 struct cpsw_priv *priv;
1548 void __iomem *ss_regs;
1549 struct resource *ss_res;
1550 struct gpio_descs *mode;
1551 const struct soc_device_attribute *soc;
1552 struct cpsw_common *cpsw;
1553 int ret = 0, ch;
1554 int irq;
1555
1556 cpsw = devm_kzalloc(dev, size: sizeof(struct cpsw_common), GFP_KERNEL);
1557 if (!cpsw)
1558 return -ENOMEM;
1559
1560 platform_set_drvdata(pdev, data: cpsw);
1561 cpsw_slave_index = cpsw_slave_index_priv;
1562
1563 cpsw->dev = dev;
1564
1565 mode = devm_gpiod_get_array_optional(dev, con_id: "mode", flags: GPIOD_OUT_LOW);
1566 if (IS_ERR(ptr: mode)) {
1567 ret = PTR_ERR(ptr: mode);
1568 dev_err(dev, "gpio request failed, ret %d\n", ret);
1569 return ret;
1570 }
1571
1572 clk = devm_clk_get(dev, id: "fck");
1573 if (IS_ERR(ptr: clk)) {
1574 ret = PTR_ERR(ptr: clk);
1575 dev_err(dev, "fck is not found %d\n", ret);
1576 return ret;
1577 }
1578 cpsw->bus_freq_mhz = clk_get_rate(clk) / 1000000;
1579
1580 ss_regs = devm_platform_get_and_ioremap_resource(pdev, index: 0, res: &ss_res);
1581 if (IS_ERR(ptr: ss_regs))
1582 return PTR_ERR(ptr: ss_regs);
1583 cpsw->regs = ss_regs;
1584
1585 cpsw->wr_regs = devm_platform_ioremap_resource(pdev, index: 1);
1586 if (IS_ERR(ptr: cpsw->wr_regs))
1587 return PTR_ERR(ptr: cpsw->wr_regs);
1588
1589 /* RX IRQ */
1590 irq = platform_get_irq(pdev, 1);
1591 if (irq < 0)
1592 return irq;
1593 cpsw->irqs_table[0] = irq;
1594
1595 /* TX IRQ */
1596 irq = platform_get_irq(pdev, 2);
1597 if (irq < 0)
1598 return irq;
1599 cpsw->irqs_table[1] = irq;
1600
1601 /* get misc irq*/
1602 irq = platform_get_irq(pdev, 3);
1603 if (irq <= 0)
1604 return irq;
1605 cpsw->misc_irq = irq;
1606
1607 /*
1608 * This may be required here for child devices.
1609 */
1610 pm_runtime_enable(dev);
1611
1612 /* Need to enable clocks with runtime PM api to access module
1613 * registers
1614 */
1615 ret = pm_runtime_resume_and_get(dev);
1616 if (ret < 0)
1617 goto clean_runtime_disable_ret;
1618
1619 ret = cpsw_probe_dt(data: &cpsw->data, pdev);
1620 if (ret)
1621 goto clean_dt_ret;
1622
1623 soc = soc_device_match(matches: cpsw_soc_devices);
1624 if (soc)
1625 cpsw->quirk_irq = true;
1626
1627 data = &cpsw->data;
1628 cpsw->slaves = devm_kcalloc(dev,
1629 n: data->slaves, size: sizeof(struct cpsw_slave),
1630 GFP_KERNEL);
1631 if (!cpsw->slaves) {
1632 ret = -ENOMEM;
1633 goto clean_dt_ret;
1634 }
1635
1636 cpsw->rx_packet_max = max(rx_packet_max, CPSW_MAX_PACKET_SIZE);
1637 cpsw->descs_pool_size = descs_pool_size;
1638
1639 ret = cpsw_init_common(cpsw, ss_regs, ale_ageout,
1640 desc_mem_phys: ss_res->start + CPSW2_BD_OFFSET,
1641 descs_pool_size);
1642 if (ret)
1643 goto clean_dt_ret;
1644
1645 ch = cpsw->quirk_irq ? 0 : 7;
1646 cpsw->txv[0].ch = cpdma_chan_create(ctlr: cpsw->dma, chan_num: ch, handler: cpsw_tx_handler, rx_type: 0);
1647 if (IS_ERR(ptr: cpsw->txv[0].ch)) {
1648 dev_err(dev, "error initializing tx dma channel\n");
1649 ret = PTR_ERR(ptr: cpsw->txv[0].ch);
1650 goto clean_cpts;
1651 }
1652
1653 cpsw->rxv[0].ch = cpdma_chan_create(ctlr: cpsw->dma, chan_num: 0, handler: cpsw_rx_handler, rx_type: 1);
1654 if (IS_ERR(ptr: cpsw->rxv[0].ch)) {
1655 dev_err(dev, "error initializing rx dma channel\n");
1656 ret = PTR_ERR(ptr: cpsw->rxv[0].ch);
1657 goto clean_cpts;
1658 }
1659 cpsw_split_res(cpsw);
1660
1661 /* setup netdev */
1662 ndev = devm_alloc_etherdev_mqs(dev, sizeof_priv: sizeof(struct cpsw_priv),
1663 CPSW_MAX_QUEUES, CPSW_MAX_QUEUES);
1664 if (!ndev) {
1665 dev_err(dev, "error allocating net_device\n");
1666 ret = -ENOMEM;
1667 goto clean_cpts;
1668 }
1669
1670 priv = netdev_priv(dev: ndev);
1671 priv->cpsw = cpsw;
1672 priv->ndev = ndev;
1673 priv->dev = dev;
1674 priv->msg_enable = netif_msg_init(debug_value: debug_level, CPSW_DEBUG);
1675 priv->emac_port = 0;
1676 INIT_WORK(&priv->rx_mode_work, cpsw_ndo_set_rx_mode_work);
1677
1678 if (is_valid_ether_addr(addr: data->slave_data[0].mac_addr)) {
1679 memcpy(priv->mac_addr, data->slave_data[0].mac_addr, ETH_ALEN);
1680 dev_info(dev, "Detected MACID = %pM\n", priv->mac_addr);
1681 } else {
1682 eth_random_addr(addr: priv->mac_addr);
1683 dev_info(dev, "Random MACID = %pM\n", priv->mac_addr);
1684 }
1685
1686 eth_hw_addr_set(dev: ndev, addr: priv->mac_addr);
1687
1688 cpsw->slaves[0].ndev = ndev;
1689
1690 ndev->features |= NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_HW_VLAN_CTAG_RX;
1691 ndev->xdp_features = NETDEV_XDP_ACT_BASIC | NETDEV_XDP_ACT_REDIRECT |
1692 NETDEV_XDP_ACT_NDO_XMIT;
1693 /* Hijack PHY timestamping requests in order to block them */
1694 if (!cpsw->data.dual_emac)
1695 ndev->see_all_hwtstamp_requests = true;
1696
1697 ndev->netdev_ops = &cpsw_netdev_ops;
1698 ndev->ethtool_ops = &cpsw_ethtool_ops;
1699 netif_napi_add(dev: ndev, napi: &cpsw->napi_rx,
1700 poll: cpsw->quirk_irq ? cpsw_rx_poll : cpsw_rx_mq_poll);
1701 netif_napi_add_tx(dev: ndev, napi: &cpsw->napi_tx,
1702 poll: cpsw->quirk_irq ? cpsw_tx_poll : cpsw_tx_mq_poll);
1703
1704 /* register the network device */
1705 SET_NETDEV_DEV(ndev, dev);
1706 ndev->dev.of_node = cpsw->slaves[0].data->slave_node;
1707 ret = register_netdev(dev: ndev);
1708 if (ret) {
1709 dev_err(dev, "error registering net device\n");
1710 ret = -ENODEV;
1711 goto clean_cpts;
1712 }
1713
1714 if (cpsw->data.dual_emac) {
1715 ret = cpsw_probe_dual_emac(priv);
1716 if (ret) {
1717 cpsw_err(priv, probe, "error probe slave 2 emac interface\n");
1718 goto clean_unregister_netdev_ret;
1719 }
1720 }
1721
1722 /* Grab RX and TX IRQs. Note that we also have RX_THRESHOLD and
1723 * MISC IRQs which are always kept disabled with this driver so
1724 * we will not request them.
1725 *
1726 * If anyone wants to implement support for those, make sure to
1727 * first request and append them to irqs_table array.
1728 */
1729 ret = devm_request_irq(dev, irq: cpsw->irqs_table[0], handler: cpsw_rx_interrupt,
1730 irqflags: 0, devname: dev_name(dev), dev_id: cpsw);
1731 if (ret < 0) {
1732 dev_err(dev, "error attaching irq (%d)\n", ret);
1733 goto clean_unregister_netdev_ret;
1734 }
1735
1736
1737 ret = devm_request_irq(dev, irq: cpsw->irqs_table[1], handler: cpsw_tx_interrupt,
1738 irqflags: 0, devname: dev_name(dev: &pdev->dev), dev_id: cpsw);
1739 if (ret < 0) {
1740 dev_err(dev, "error attaching irq (%d)\n", ret);
1741 goto clean_unregister_netdev_ret;
1742 }
1743
1744 if (!cpsw->cpts)
1745 goto skip_cpts;
1746
1747 ret = devm_request_irq(dev: &pdev->dev, irq: cpsw->misc_irq, handler: cpsw_misc_interrupt,
1748 irqflags: 0, devname: dev_name(dev: &pdev->dev), dev_id: cpsw);
1749 if (ret < 0) {
1750 dev_err(dev, "error attaching misc irq (%d)\n", ret);
1751 goto clean_unregister_netdev_ret;
1752 }
1753
1754 /* Enable misc CPTS evnt_pend IRQ */
1755 cpts_set_irqpoll(cpts: cpsw->cpts, en: false);
1756
1757skip_cpts:
1758 cpsw_notice(priv, probe,
1759 "initialized device (regs %pa, irq %d, pool size %d)\n",
1760 &ss_res->start, cpsw->irqs_table[0], descs_pool_size);
1761
1762 pm_runtime_put(dev: &pdev->dev);
1763
1764 return 0;
1765
1766clean_unregister_netdev_ret:
1767 unregister_netdev(dev: ndev);
1768clean_cpts:
1769 cpts_release(cpts: cpsw->cpts);
1770 cpdma_ctlr_destroy(ctlr: cpsw->dma);
1771clean_dt_ret:
1772 cpsw_remove_dt(pdev);
1773 pm_runtime_put_sync(dev: &pdev->dev);
1774clean_runtime_disable_ret:
1775 pm_runtime_disable(dev: &pdev->dev);
1776 return ret;
1777}
1778
1779static void cpsw_remove(struct platform_device *pdev)
1780{
1781 struct cpsw_common *cpsw = platform_get_drvdata(pdev);
1782 struct net_device *ndev;
1783 struct cpsw_priv *priv;
1784 int i, ret;
1785
1786 ret = pm_runtime_resume_and_get(dev: &pdev->dev);
1787 if (ret < 0) {
1788 /* Note, if this error path is taken, we're leaking some
1789 * resources.
1790 */
1791 dev_err(&pdev->dev, "Failed to resume device (%pe)\n",
1792 ERR_PTR(ret));
1793 return;
1794 }
1795
1796 for (i = 0; i < cpsw->data.slaves; i++) {
1797 ndev = cpsw->slaves[i].ndev;
1798 if (!ndev)
1799 continue;
1800
1801 priv = netdev_priv(dev: ndev);
1802 unregister_netdev(dev: ndev);
1803 disable_work_sync(work: &priv->rx_mode_work);
1804 }
1805
1806 cpts_release(cpts: cpsw->cpts);
1807 cpdma_ctlr_destroy(ctlr: cpsw->dma);
1808 cpsw_remove_dt(pdev);
1809 pm_runtime_put_sync(dev: &pdev->dev);
1810 pm_runtime_disable(dev: &pdev->dev);
1811}
1812
1813#ifdef CONFIG_PM_SLEEP
1814static int cpsw_suspend(struct device *dev)
1815{
1816 struct cpsw_common *cpsw = dev_get_drvdata(dev);
1817 int i;
1818
1819 rtnl_lock();
1820
1821 for (i = 0; i < cpsw->data.slaves; i++)
1822 if (cpsw->slaves[i].ndev)
1823 if (netif_running(dev: cpsw->slaves[i].ndev))
1824 cpsw_ndo_stop(ndev: cpsw->slaves[i].ndev);
1825
1826 rtnl_unlock();
1827
1828 /* Select sleep pin state */
1829 pinctrl_pm_select_sleep_state(dev);
1830
1831 return 0;
1832}
1833
1834static int cpsw_resume(struct device *dev)
1835{
1836 struct cpsw_common *cpsw = dev_get_drvdata(dev);
1837 int i;
1838
1839 /* Select default pin state */
1840 pinctrl_pm_select_default_state(dev);
1841
1842 /* shut up ASSERT_RTNL() warning in netif_set_real_num_tx/rx_queues */
1843 rtnl_lock();
1844
1845 for (i = 0; i < cpsw->data.slaves; i++)
1846 if (cpsw->slaves[i].ndev)
1847 if (netif_running(dev: cpsw->slaves[i].ndev))
1848 cpsw_ndo_open(ndev: cpsw->slaves[i].ndev);
1849
1850 rtnl_unlock();
1851
1852 return 0;
1853}
1854#endif
1855
1856static SIMPLE_DEV_PM_OPS(cpsw_pm_ops, cpsw_suspend, cpsw_resume);
1857
1858static struct platform_driver cpsw_driver = {
1859 .driver = {
1860 .name = "cpsw",
1861 .pm = &cpsw_pm_ops,
1862 .of_match_table = cpsw_of_mtable,
1863 },
1864 .probe = cpsw_probe,
1865 .remove = cpsw_remove,
1866};
1867
1868module_platform_driver(cpsw_driver);
1869
1870MODULE_LICENSE("GPL");
1871MODULE_AUTHOR("Cyril Chemparathy <cyril@ti.com>");
1872MODULE_AUTHOR("Mugunthan V N <mugunthanvnm@ti.com>");
1873MODULE_DESCRIPTION("TI CPSW Ethernet driver");
1874

source code of linux/drivers/net/ethernet/ti/cpsw.c