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treewide: remove redundant IS_ERR() before error code check
[linux/fpc-iii.git] / drivers / net / ethernet / ti / cpsw.c
blob6ae4a72e6f439138fff297fc63b8896ea6ca8a29
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_device.h>
31 #include <linux/if_vlan.h>
32 #include <linux/kmemleak.h>
33 #include <linux/sys_soc.h>
34 #include <net/page_pool.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
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
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
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 */
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
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
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
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
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
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
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
336 static unsigned int cpsw_rxbuf_total_len(unsigned int len)
337 {
338 len += CPSW_HEADROOM;
339 len += SKB_DATA_ALIGN(sizeof(struct skb_shared_info));
340
341 return SKB_DATA_ALIGN(len);
342 }
343
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;
353 struct net_device *ndev = xmeta->ndev;
354 struct cpsw_priv *priv;
355 struct page_pool *pool;
356 struct sk_buff *skb;
357 struct xdp_buff xdp;
358 dma_addr_t dma;
359
360 if (cpsw->data.dual_emac && status >= 0) {
361 port = CPDMA_RX_SOURCE_PORT(status);
362 if (port)
363 ndev = cpsw->slaves[--port].ndev;
364 }
365
366 priv = netdev_priv(ndev);
367 pool = cpsw->page_pool[ch];
368 if (unlikely(status < 0) || unlikely(!netif_running(ndev))) {
369 /* In dual emac mode check for all interfaces */
370 if (cpsw->data.dual_emac && cpsw->usage_count &&
371 (status >= 0)) {
372 /* The packet received is for the interface which
373 * is already down and the other interface is up
374 * and running, instead of freeing which results
375 * in reducing of the number of rx descriptor in
376 * DMA engine, requeue page back to cpdma.
377 */
378 new_page = page;
379 goto requeue;
380 }
381
382 /* the interface is going down, pages are purged */
383 page_pool_recycle_direct(pool, page);
384 return;
385 }
386
387 new_page = page_pool_dev_alloc_pages(pool);
388 if (unlikely(!new_page)) {
389 new_page = page;
390 ndev->stats.rx_dropped++;
391 goto requeue;
392 }
393
394 if (priv->xdp_prog) {
395 if (status & CPDMA_RX_VLAN_ENCAP) {
396 xdp.data = pa + CPSW_HEADROOM +
397 CPSW_RX_VLAN_ENCAP_HDR_SIZE;
398 xdp.data_end = xdp.data + len -
399 CPSW_RX_VLAN_ENCAP_HDR_SIZE;
400 } else {
401 xdp.data = pa + CPSW_HEADROOM;
402 xdp.data_end = xdp.data + len;
403 }
404
405 xdp_set_data_meta_invalid(&xdp);
406
407 xdp.data_hard_start = pa;
408 xdp.rxq = &priv->xdp_rxq[ch];
409
410 port = priv->emac_port + cpsw->data.dual_emac;
411 ret = cpsw_run_xdp(priv, ch, &xdp, page, port);
412 if (ret != CPSW_XDP_PASS)
413 goto requeue;
414
415 /* XDP prog might have changed packet data and boundaries */
416 len = xdp.data_end - xdp.data;
417 headroom = xdp.data - xdp.data_hard_start;
418
419 /* XDP prog can modify vlan tag, so can't use encap header */
420 status &= ~CPDMA_RX_VLAN_ENCAP;
421 }
422
423 /* pass skb to netstack if no XDP prog or returned XDP_PASS */
424 skb = build_skb(pa, cpsw_rxbuf_total_len(pkt_size));
425 if (!skb) {
426 ndev->stats.rx_dropped++;
427 page_pool_recycle_direct(pool, page);
428 goto requeue;
429 }
430
431 skb_reserve(skb, headroom);
432 skb_put(skb, len);
433 skb->dev = ndev;
434 if (status & CPDMA_RX_VLAN_ENCAP)
435 cpsw_rx_vlan_encap(skb);
436 if (priv->rx_ts_enabled)
437 cpts_rx_timestamp(cpsw->cpts, skb);
438 skb->protocol = eth_type_trans(skb, ndev);
439
440 /* unmap page as no netstack skb page recycling */
441 page_pool_release_page(pool, page);
442 netif_receive_skb(skb);
443
444 ndev->stats.rx_bytes += len;
445 ndev->stats.rx_packets++;
446
447 requeue:
448 xmeta = page_address(new_page) + CPSW_XMETA_OFFSET;
449 xmeta->ndev = ndev;
450 xmeta->ch = ch;
451
452 dma = page_pool_get_dma_addr(new_page) + CPSW_HEADROOM;
453 ret = cpdma_chan_submit_mapped(cpsw->rxv[ch].ch, new_page, dma,
454 pkt_size, 0);
455 if (ret < 0) {
456 WARN_ON(ret == -ENOMEM);
457 page_pool_recycle_direct(pool, new_page);
458 }
459 }
460
461 static void _cpsw_adjust_link(struct cpsw_slave *slave,
462 struct cpsw_priv *priv, bool *link)
463 {
464 struct phy_device *phy = slave->phy;
465 u32 mac_control = 0;
466 u32 slave_port;
467 struct cpsw_common *cpsw = priv->cpsw;
468
469 if (!phy)
470 return;
471
472 slave_port = cpsw_get_slave_port(slave->slave_num);
473
474 if (phy->link) {
475 mac_control = CPSW_SL_CTL_GMII_EN;
476
477 if (phy->speed == 1000)
478 mac_control |= CPSW_SL_CTL_GIG;
479 if (phy->duplex)
480 mac_control |= CPSW_SL_CTL_FULLDUPLEX;
481
482 /* set speed_in input in case RMII mode is used in 100Mbps */
483 if (phy->speed == 100)
484 mac_control |= CPSW_SL_CTL_IFCTL_A;
485 /* in band mode only works in 10Mbps RGMII mode */
486 else if ((phy->speed == 10) && phy_interface_is_rgmii(phy))
487 mac_control |= CPSW_SL_CTL_EXT_EN; /* In Band mode */
488
489 if (priv->rx_pause)
490 mac_control |= CPSW_SL_CTL_RX_FLOW_EN;
491
492 if (priv->tx_pause)
493 mac_control |= CPSW_SL_CTL_TX_FLOW_EN;
494
495 if (mac_control != slave->mac_control)
496 cpsw_sl_ctl_set(slave->mac_sl, mac_control);
497
498 /* enable forwarding */
499 cpsw_ale_control_set(cpsw->ale, slave_port,
500 ALE_PORT_STATE, ALE_PORT_STATE_FORWARD);
501
502 *link = true;
503
504 if (priv->shp_cfg_speed &&
505 priv->shp_cfg_speed != slave->phy->speed &&
506 !cpsw_shp_is_off(priv))
507 dev_warn(priv->dev,
508 "Speed was changed, CBS shaper speeds are changed!");
509 } else {
510 mac_control = 0;
511 /* disable forwarding */
512 cpsw_ale_control_set(cpsw->ale, slave_port,
513 ALE_PORT_STATE, ALE_PORT_STATE_DISABLE);
514
515 cpsw_sl_wait_for_idle(slave->mac_sl, 100);
516
517 cpsw_sl_ctl_reset(slave->mac_sl);
518 }
519
520 if (mac_control != slave->mac_control)
521 phy_print_status(phy);
522
523 slave->mac_control = mac_control;
524 }
525
526 static void cpsw_adjust_link(struct net_device *ndev)
527 {
528 struct cpsw_priv *priv = netdev_priv(ndev);
529 struct cpsw_common *cpsw = priv->cpsw;
530 bool link = false;
531
532 for_each_slave(priv, _cpsw_adjust_link, priv, &link);
533
534 if (link) {
535 if (cpsw_need_resplit(cpsw))
536 cpsw_split_res(cpsw);
537
538 netif_carrier_on(ndev);
539 if (netif_running(ndev))
540 netif_tx_wake_all_queues(ndev);
541 } else {
542 netif_carrier_off(ndev);
543 netif_tx_stop_all_queues(ndev);
544 }
545 }
546
547 static inline void cpsw_add_dual_emac_def_ale_entries(
548 struct cpsw_priv *priv, struct cpsw_slave *slave,
549 u32 slave_port)
550 {
551 struct cpsw_common *cpsw = priv->cpsw;
552 u32 port_mask = 1 << slave_port | ALE_PORT_HOST;
553
554 if (cpsw->version == CPSW_VERSION_1)
555 slave_write(slave, slave->port_vlan, CPSW1_PORT_VLAN);
556 else
557 slave_write(slave, slave->port_vlan, CPSW2_PORT_VLAN);
558 cpsw_ale_add_vlan(cpsw->ale, slave->port_vlan, port_mask,
559 port_mask, port_mask, 0);
560 cpsw_ale_add_mcast(cpsw->ale, priv->ndev->broadcast,
561 ALE_PORT_HOST, ALE_VLAN, slave->port_vlan, 0);
562 cpsw_ale_add_ucast(cpsw->ale, priv->mac_addr,
563 HOST_PORT_NUM, ALE_VLAN |
564 ALE_SECURE, slave->port_vlan);
565 cpsw_ale_control_set(cpsw->ale, slave_port,
566 ALE_PORT_DROP_UNKNOWN_VLAN, 1);
567 }
568
569 static void cpsw_slave_open(struct cpsw_slave *slave, struct cpsw_priv *priv)
570 {
571 u32 slave_port;
572 struct phy_device *phy;
573 struct cpsw_common *cpsw = priv->cpsw;
574
575 cpsw_sl_reset(slave->mac_sl, 100);
576 cpsw_sl_ctl_reset(slave->mac_sl);
577
578 /* setup priority mapping */
579 cpsw_sl_reg_write(slave->mac_sl, CPSW_SL_RX_PRI_MAP,
580 RX_PRIORITY_MAPPING);
581
582 switch (cpsw->version) {
583 case CPSW_VERSION_1:
584 slave_write(slave, TX_PRIORITY_MAPPING, CPSW1_TX_PRI_MAP);
585 /* Increase RX FIFO size to 5 for supporting fullduplex
586 * flow control mode
587 */
588 slave_write(slave,
589 (CPSW_MAX_BLKS_TX << CPSW_MAX_BLKS_TX_SHIFT) |
590 CPSW_MAX_BLKS_RX, CPSW1_MAX_BLKS);
591 break;
592 case CPSW_VERSION_2:
593 case CPSW_VERSION_3:
594 case CPSW_VERSION_4:
595 slave_write(slave, TX_PRIORITY_MAPPING, CPSW2_TX_PRI_MAP);
596 /* Increase RX FIFO size to 5 for supporting fullduplex
597 * flow control mode
598 */
599 slave_write(slave,
600 (CPSW_MAX_BLKS_TX << CPSW_MAX_BLKS_TX_SHIFT) |
601 CPSW_MAX_BLKS_RX, CPSW2_MAX_BLKS);
602 break;
603 }
604
605 /* setup max packet size, and mac address */
606 cpsw_sl_reg_write(slave->mac_sl, CPSW_SL_RX_MAXLEN,
607 cpsw->rx_packet_max);
608 cpsw_set_slave_mac(slave, priv);
609
610 slave->mac_control = 0; /* no link yet */
611
612 slave_port = cpsw_get_slave_port(slave->slave_num);
613
614 if (cpsw->data.dual_emac)
615 cpsw_add_dual_emac_def_ale_entries(priv, slave, slave_port);
616 else
617 cpsw_ale_add_mcast(cpsw->ale, priv->ndev->broadcast,
618 1 << slave_port, 0, 0, ALE_MCAST_FWD_2);
619
620 if (slave->data->phy_node) {
621 phy = of_phy_connect(priv->ndev, slave->data->phy_node,
622 &cpsw_adjust_link, 0, slave->data->phy_if);
623 if (!phy) {
624 dev_err(priv->dev, "phy \"%pOF\" not found on slave %d\n",
625 slave->data->phy_node,
626 slave->slave_num);
627 return;
628 }
629 } else {
630 phy = phy_connect(priv->ndev, slave->data->phy_id,
631 &cpsw_adjust_link, slave->data->phy_if);
632 if (IS_ERR(phy)) {
633 dev_err(priv->dev,
634 "phy \"%s\" not found on slave %d, err %ld\n",
635 slave->data->phy_id, slave->slave_num,
636 PTR_ERR(phy));
637 return;
638 }
639 }
640
641 slave->phy = phy;
642
643 phy_attached_info(slave->phy);
644
645 phy_start(slave->phy);
646
647 /* Configure GMII_SEL register */
648 if (!IS_ERR(slave->data->ifphy))
649 phy_set_mode_ext(slave->data->ifphy, PHY_MODE_ETHERNET,
650 slave->data->phy_if);
651 else
652 cpsw_phy_sel(cpsw->dev, slave->phy->interface,
653 slave->slave_num);
654 }
655
656 static inline void cpsw_add_default_vlan(struct cpsw_priv *priv)
657 {
658 struct cpsw_common *cpsw = priv->cpsw;
659 const int vlan = cpsw->data.default_vlan;
660 u32 reg;
661 int i;
662 int unreg_mcast_mask;
663
664 reg = (cpsw->version == CPSW_VERSION_1) ? CPSW1_PORT_VLAN :
665 CPSW2_PORT_VLAN;
666
667 writel(vlan, &cpsw->host_port_regs->port_vlan);
668
669 for (i = 0; i < cpsw->data.slaves; i++)
670 slave_write(cpsw->slaves + i, vlan, reg);
671
672 if (priv->ndev->flags & IFF_ALLMULTI)
673 unreg_mcast_mask = ALE_ALL_PORTS;
674 else
675 unreg_mcast_mask = ALE_PORT_1 | ALE_PORT_2;
676
677 cpsw_ale_add_vlan(cpsw->ale, vlan, ALE_ALL_PORTS,
678 ALE_ALL_PORTS, ALE_ALL_PORTS,
679 unreg_mcast_mask);
680 }
681
682 static void cpsw_init_host_port(struct cpsw_priv *priv)
683 {
684 u32 fifo_mode;
685 u32 control_reg;
686 struct cpsw_common *cpsw = priv->cpsw;
687
688 /* soft reset the controller and initialize ale */
689 soft_reset("cpsw", &cpsw->regs->soft_reset);
690 cpsw_ale_start(cpsw->ale);
691
692 /* switch to vlan unaware mode */
693 cpsw_ale_control_set(cpsw->ale, HOST_PORT_NUM, ALE_VLAN_AWARE,
694 CPSW_ALE_VLAN_AWARE);
695 control_reg = readl(&cpsw->regs->control);
696 control_reg |= CPSW_VLAN_AWARE | CPSW_RX_VLAN_ENCAP;
697 writel(control_reg, &cpsw->regs->control);
698 fifo_mode = (cpsw->data.dual_emac) ? CPSW_FIFO_DUAL_MAC_MODE :
699 CPSW_FIFO_NORMAL_MODE;
700 writel(fifo_mode, &cpsw->host_port_regs->tx_in_ctl);
701
702 /* setup host port priority mapping */
703 writel_relaxed(CPDMA_TX_PRIORITY_MAP,
704 &cpsw->host_port_regs->cpdma_tx_pri_map);
705 writel_relaxed(0, &cpsw->host_port_regs->cpdma_rx_chan_map);
706
707 cpsw_ale_control_set(cpsw->ale, HOST_PORT_NUM,
708 ALE_PORT_STATE, ALE_PORT_STATE_FORWARD);
709
710 if (!cpsw->data.dual_emac) {
711 cpsw_ale_add_ucast(cpsw->ale, priv->mac_addr, HOST_PORT_NUM,
712 0, 0);
713 cpsw_ale_add_mcast(cpsw->ale, priv->ndev->broadcast,
714 ALE_PORT_HOST, 0, 0, ALE_MCAST_FWD_2);
715 }
716 }
717
718 static void cpsw_slave_stop(struct cpsw_slave *slave, struct cpsw_common *cpsw)
719 {
720 u32 slave_port;
721
722 slave_port = cpsw_get_slave_port(slave->slave_num);
723
724 if (!slave->phy)
725 return;
726 phy_stop(slave->phy);
727 phy_disconnect(slave->phy);
728 slave->phy = NULL;
729 cpsw_ale_control_set(cpsw->ale, slave_port,
730 ALE_PORT_STATE, ALE_PORT_STATE_DISABLE);
731 cpsw_sl_reset(slave->mac_sl, 100);
732 cpsw_sl_ctl_reset(slave->mac_sl);
733 }
734
735 static int cpsw_restore_vlans(struct net_device *vdev, int vid, void *arg)
736 {
737 struct cpsw_priv *priv = arg;
738
739 if (!vdev)
740 return 0;
741
742 cpsw_ndo_vlan_rx_add_vid(priv->ndev, 0, vid);
743 return 0;
744 }
745
746 /* restore resources after port reset */
747 static void cpsw_restore(struct cpsw_priv *priv)
748 {
749 /* restore vlan configurations */
750 vlan_for_each(priv->ndev, cpsw_restore_vlans, priv);
751
752 /* restore MQPRIO offload */
753 for_each_slave(priv, cpsw_mqprio_resume, priv);
754
755 /* restore CBS offload */
756 for_each_slave(priv, cpsw_cbs_resume, priv);
757 }
758
759 static int cpsw_ndo_open(struct net_device *ndev)
760 {
761 struct cpsw_priv *priv = netdev_priv(ndev);
762 struct cpsw_common *cpsw = priv->cpsw;
763 int ret;
764 u32 reg;
765
766 ret = pm_runtime_get_sync(cpsw->dev);
767 if (ret < 0) {
768 pm_runtime_put_noidle(cpsw->dev);
769 return ret;
770 }
771
772 netif_carrier_off(ndev);
773
774 /* Notify the stack of the actual queue counts. */
775 ret = netif_set_real_num_tx_queues(ndev, cpsw->tx_ch_num);
776 if (ret) {
777 dev_err(priv->dev, "cannot set real number of tx queues\n");
778 goto err_cleanup;
779 }
780
781 ret = netif_set_real_num_rx_queues(ndev, cpsw->rx_ch_num);
782 if (ret) {
783 dev_err(priv->dev, "cannot set real number of rx queues\n");
784 goto err_cleanup;
785 }
786
787 reg = cpsw->version;
788
789 dev_info(priv->dev, "initializing cpsw version %d.%d (%d)\n",
790 CPSW_MAJOR_VERSION(reg), CPSW_MINOR_VERSION(reg),
791 CPSW_RTL_VERSION(reg));
792
793 /* Initialize host and slave ports */
794 if (!cpsw->usage_count)
795 cpsw_init_host_port(priv);
796 for_each_slave(priv, cpsw_slave_open, priv);
797
798 /* Add default VLAN */
799 if (!cpsw->data.dual_emac)
800 cpsw_add_default_vlan(priv);
801 else
802 cpsw_ale_add_vlan(cpsw->ale, cpsw->data.default_vlan,
803 ALE_ALL_PORTS, ALE_ALL_PORTS, 0, 0);
804
805 /* initialize shared resources for every ndev */
806 if (!cpsw->usage_count) {
807 /* disable priority elevation */
808 writel_relaxed(0, &cpsw->regs->ptype);
809
810 /* enable statistics collection only on all ports */
811 writel_relaxed(0x7, &cpsw->regs->stat_port_en);
812
813 /* Enable internal fifo flow control */
814 writel(0x7, &cpsw->regs->flow_control);
815
816 napi_enable(&cpsw->napi_rx);
817 napi_enable(&cpsw->napi_tx);
818
819 if (cpsw->tx_irq_disabled) {
820 cpsw->tx_irq_disabled = false;
821 enable_irq(cpsw->irqs_table[1]);
822 }
823
824 if (cpsw->rx_irq_disabled) {
825 cpsw->rx_irq_disabled = false;
826 enable_irq(cpsw->irqs_table[0]);
827 }
828
829 /* create rxqs for both infs in dual mac as they use same pool
830 * and must be destroyed together when no users.
831 */
832 ret = cpsw_create_xdp_rxqs(cpsw);
833 if (ret < 0)
834 goto err_cleanup;
835
836 ret = cpsw_fill_rx_channels(priv);
837 if (ret < 0)
838 goto err_cleanup;
839
840 if (cpts_register(cpsw->cpts))
841 dev_err(priv->dev, "error registering cpts device\n");
842
843 }
844
845 cpsw_restore(priv);
846
847 /* Enable Interrupt pacing if configured */
848 if (cpsw->coal_intvl != 0) {
849 struct ethtool_coalesce coal;
850
851 coal.rx_coalesce_usecs = cpsw->coal_intvl;
852 cpsw_set_coalesce(ndev, &coal);
853 }
854
855 cpdma_ctlr_start(cpsw->dma);
856 cpsw_intr_enable(cpsw);
857 cpsw->usage_count++;
858
859 return 0;
860
861 err_cleanup:
862 if (!cpsw->usage_count) {
863 cpdma_ctlr_stop(cpsw->dma);
864 cpsw_destroy_xdp_rxqs(cpsw);
865 }
866
867 for_each_slave(priv, cpsw_slave_stop, cpsw);
868 pm_runtime_put_sync(cpsw->dev);
869 netif_carrier_off(priv->ndev);
870 return ret;
871 }
872
873 static int cpsw_ndo_stop(struct net_device *ndev)
874 {
875 struct cpsw_priv *priv = netdev_priv(ndev);
876 struct cpsw_common *cpsw = priv->cpsw;
877
878 cpsw_info(priv, ifdown, "shutting down cpsw device\n");
879 __hw_addr_ref_unsync_dev(&ndev->mc, ndev, cpsw_purge_all_mc);
880 netif_tx_stop_all_queues(priv->ndev);
881 netif_carrier_off(priv->ndev);
882
883 if (cpsw->usage_count <= 1) {
884 napi_disable(&cpsw->napi_rx);
885 napi_disable(&cpsw->napi_tx);
886 cpts_unregister(cpsw->cpts);
887 cpsw_intr_disable(cpsw);
888 cpdma_ctlr_stop(cpsw->dma);
889 cpsw_ale_stop(cpsw->ale);
890 cpsw_destroy_xdp_rxqs(cpsw);
891 }
892 for_each_slave(priv, cpsw_slave_stop, cpsw);
893
894 if (cpsw_need_resplit(cpsw))
895 cpsw_split_res(cpsw);
896
897 cpsw->usage_count--;
898 pm_runtime_put_sync(cpsw->dev);
899 return 0;
900 }
901
902 static netdev_tx_t cpsw_ndo_start_xmit(struct sk_buff *skb,
903 struct net_device *ndev)
904 {
905 struct cpsw_priv *priv = netdev_priv(ndev);
906 struct cpsw_common *cpsw = priv->cpsw;
907 struct cpts *cpts = cpsw->cpts;
908 struct netdev_queue *txq;
909 struct cpdma_chan *txch;
910 int ret, q_idx;
911
912 if (skb_padto(skb, CPSW_MIN_PACKET_SIZE)) {
913 cpsw_err(priv, tx_err, "packet pad failed\n");
914 ndev->stats.tx_dropped++;
915 return NET_XMIT_DROP;
916 }
917
918 if (skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP &&
919 priv->tx_ts_enabled && cpts_can_timestamp(cpts, skb))
920 skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS;
921
922 q_idx = skb_get_queue_mapping(skb);
923 if (q_idx >= cpsw->tx_ch_num)
924 q_idx = q_idx % cpsw->tx_ch_num;
925
926 txch = cpsw->txv[q_idx].ch;
927 txq = netdev_get_tx_queue(ndev, q_idx);
928 skb_tx_timestamp(skb);
929 ret = cpdma_chan_submit(txch, skb, skb->data, skb->len,
930 priv->emac_port + cpsw->data.dual_emac);
931 if (unlikely(ret != 0)) {
932 cpsw_err(priv, tx_err, "desc submit failed\n");
933 goto fail;
934 }
935
936 /* If there is no more tx desc left free then we need to
937 * tell the kernel to stop sending us tx frames.
938 */
939 if (unlikely(!cpdma_check_free_tx_desc(txch))) {
940 netif_tx_stop_queue(txq);
941
942 /* Barrier, so that stop_queue visible to other cpus */
943 smp_mb__after_atomic();
944
945 if (cpdma_check_free_tx_desc(txch))
946 netif_tx_wake_queue(txq);
947 }
948
949 return NETDEV_TX_OK;
950 fail:
951 ndev->stats.tx_dropped++;
952 netif_tx_stop_queue(txq);
953
954 /* Barrier, so that stop_queue visible to other cpus */
955 smp_mb__after_atomic();
956
957 if (cpdma_check_free_tx_desc(txch))
958 netif_tx_wake_queue(txq);
959
960 return NETDEV_TX_BUSY;
961 }
962
963 static int cpsw_ndo_set_mac_address(struct net_device *ndev, void *p)
964 {
965 struct cpsw_priv *priv = netdev_priv(ndev);
966 struct sockaddr *addr = (struct sockaddr *)p;
967 struct cpsw_common *cpsw = priv->cpsw;
968 int flags = 0;
969 u16 vid = 0;
970 int ret;
971
972 if (!is_valid_ether_addr(addr->sa_data))
973 return -EADDRNOTAVAIL;
974
975 ret = pm_runtime_get_sync(cpsw->dev);
976 if (ret < 0) {
977 pm_runtime_put_noidle(cpsw->dev);
978 return ret;
979 }
980
981 if (cpsw->data.dual_emac) {
982 vid = cpsw->slaves[priv->emac_port].port_vlan;
983 flags = ALE_VLAN;
984 }
985
986 cpsw_ale_del_ucast(cpsw->ale, priv->mac_addr, HOST_PORT_NUM,
987 flags, vid);
988 cpsw_ale_add_ucast(cpsw->ale, addr->sa_data, HOST_PORT_NUM,
989 flags, vid);
990
991 memcpy(priv->mac_addr, addr->sa_data, ETH_ALEN);
992 memcpy(ndev->dev_addr, priv->mac_addr, ETH_ALEN);
993 for_each_slave(priv, cpsw_set_slave_mac, priv);
994
995 pm_runtime_put(cpsw->dev);
996
997 return 0;
998 }
999
1000 static inline int cpsw_add_vlan_ale_entry(struct cpsw_priv *priv,
1001 unsigned short vid)
1002 {
1003 int ret;
1004 int unreg_mcast_mask = 0;
1005 int mcast_mask;
1006 u32 port_mask;
1007 struct cpsw_common *cpsw = priv->cpsw;
1008
1009 if (cpsw->data.dual_emac) {
1010 port_mask = (1 << (priv->emac_port + 1)) | ALE_PORT_HOST;
1011
1012 mcast_mask = ALE_PORT_HOST;
1013 if (priv->ndev->flags & IFF_ALLMULTI)
1014 unreg_mcast_mask = mcast_mask;
1015 } else {
1016 port_mask = ALE_ALL_PORTS;
1017 mcast_mask = port_mask;
1018
1019 if (priv->ndev->flags & IFF_ALLMULTI)
1020 unreg_mcast_mask = ALE_ALL_PORTS;
1021 else
1022 unreg_mcast_mask = ALE_PORT_1 | ALE_PORT_2;
1023 }
1024
1025 ret = cpsw_ale_add_vlan(cpsw->ale, vid, port_mask, 0, port_mask,
1026 unreg_mcast_mask);
1027 if (ret != 0)
1028 return ret;
1029
1030 ret = cpsw_ale_add_ucast(cpsw->ale, priv->mac_addr,
1031 HOST_PORT_NUM, ALE_VLAN, vid);
1032 if (ret != 0)
1033 goto clean_vid;
1034
1035 ret = cpsw_ale_add_mcast(cpsw->ale, priv->ndev->broadcast,
1036 mcast_mask, ALE_VLAN, vid, 0);
1037 if (ret != 0)
1038 goto clean_vlan_ucast;
1039 return 0;
1040
1041 clean_vlan_ucast:
1042 cpsw_ale_del_ucast(cpsw->ale, priv->mac_addr,
1043 HOST_PORT_NUM, ALE_VLAN, vid);
1044 clean_vid:
1045 cpsw_ale_del_vlan(cpsw->ale, vid, 0);
1046 return ret;
1047 }
1048
1049 static int cpsw_ndo_vlan_rx_add_vid(struct net_device *ndev,
1050 __be16 proto, u16 vid)
1051 {
1052 struct cpsw_priv *priv = netdev_priv(ndev);
1053 struct cpsw_common *cpsw = priv->cpsw;
1054 int ret;
1055
1056 if (vid == cpsw->data.default_vlan)
1057 return 0;
1058
1059 ret = pm_runtime_get_sync(cpsw->dev);
1060 if (ret < 0) {
1061 pm_runtime_put_noidle(cpsw->dev);
1062 return ret;
1063 }
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
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_get_sync(cpsw->dev);
1098 if (ret < 0) {
1099 pm_runtime_put_noidle(cpsw->dev);
1100 return ret;
1101 }
1102
1103 if (cpsw->data.dual_emac) {
1104 int i;
1105
1106 for (i = 0; i < cpsw->data.slaves; i++) {
1107 if (vid == cpsw->slaves[i].port_vlan)
1108 goto err;
1109 }
1110 }
1111
1112 dev_info(priv->dev, "removing vlanid %d from vlan filter\n", vid);
1113 ret = cpsw_ale_del_vlan(cpsw->ale, vid, 0);
1114 ret |= cpsw_ale_del_ucast(cpsw->ale, priv->mac_addr,
1115 HOST_PORT_NUM, ALE_VLAN, vid);
1116 ret |= cpsw_ale_del_mcast(cpsw->ale, priv->ndev->broadcast,
1117 0, ALE_VLAN, vid);
1118 ret |= cpsw_ale_flush_multicast(cpsw->ale, 0, vid);
1119 err:
1120 pm_runtime_put(cpsw->dev);
1121 return ret;
1122 }
1123
1124 static int cpsw_ndo_xdp_xmit(struct net_device *ndev, int n,
1125 struct xdp_frame **frames, u32 flags)
1126 {
1127 struct cpsw_priv *priv = netdev_priv(ndev);
1128 struct cpsw_common *cpsw = priv->cpsw;
1129 struct xdp_frame *xdpf;
1130 int i, drops = 0, port;
1131
1132 if (unlikely(flags & ~XDP_XMIT_FLAGS_MASK))
1133 return -EINVAL;
1134
1135 for (i = 0; i < n; i++) {
1136 xdpf = frames[i];
1137 if (xdpf->len < CPSW_MIN_PACKET_SIZE) {
1138 xdp_return_frame_rx_napi(xdpf);
1139 drops++;
1140 continue;
1141 }
1142
1143 port = priv->emac_port + cpsw->data.dual_emac;
1144 if (cpsw_xdp_tx_frame(priv, xdpf, NULL, port))
1145 drops++;
1146 }
1147
1148 return n - drops;
1149 }
1150
1151 #ifdef CONFIG_NET_POLL_CONTROLLER
1152 static void cpsw_ndo_poll_controller(struct net_device *ndev)
1153 {
1154 struct cpsw_common *cpsw = ndev_to_cpsw(ndev);
1155
1156 cpsw_intr_disable(cpsw);
1157 cpsw_rx_interrupt(cpsw->irqs_table[0], cpsw);
1158 cpsw_tx_interrupt(cpsw->irqs_table[1], cpsw);
1159 cpsw_intr_enable(cpsw);
1160 }
1161 #endif
1162
1163 static const struct net_device_ops cpsw_netdev_ops = {
1164 .ndo_open = cpsw_ndo_open,
1165 .ndo_stop = cpsw_ndo_stop,
1166 .ndo_start_xmit = cpsw_ndo_start_xmit,
1167 .ndo_set_mac_address = cpsw_ndo_set_mac_address,
1168 .ndo_do_ioctl = cpsw_ndo_ioctl,
1169 .ndo_validate_addr = eth_validate_addr,
1170 .ndo_tx_timeout = cpsw_ndo_tx_timeout,
1171 .ndo_set_rx_mode = cpsw_ndo_set_rx_mode,
1172 .ndo_set_tx_maxrate = cpsw_ndo_set_tx_maxrate,
1173 #ifdef CONFIG_NET_POLL_CONTROLLER
1174 .ndo_poll_controller = cpsw_ndo_poll_controller,
1175 #endif
1176 .ndo_vlan_rx_add_vid = cpsw_ndo_vlan_rx_add_vid,
1177 .ndo_vlan_rx_kill_vid = cpsw_ndo_vlan_rx_kill_vid,
1178 .ndo_setup_tc = cpsw_ndo_setup_tc,
1179 .ndo_bpf = cpsw_ndo_bpf,
1180 .ndo_xdp_xmit = cpsw_ndo_xdp_xmit,
1181 };
1182
1183 static void cpsw_get_drvinfo(struct net_device *ndev,
1184 struct ethtool_drvinfo *info)
1185 {
1186 struct cpsw_common *cpsw = ndev_to_cpsw(ndev);
1187 struct platform_device *pdev = to_platform_device(cpsw->dev);
1188
1189 strlcpy(info->driver, "cpsw", sizeof(info->driver));
1190 strlcpy(info->version, "1.0", sizeof(info->version));
1191 strlcpy(info->bus_info, pdev->name, sizeof(info->bus_info));
1192 }
1193
1194 static int cpsw_set_pauseparam(struct net_device *ndev,
1195 struct ethtool_pauseparam *pause)
1196 {
1197 struct cpsw_priv *priv = netdev_priv(ndev);
1198 bool link;
1199
1200 priv->rx_pause = pause->rx_pause ? true : false;
1201 priv->tx_pause = pause->tx_pause ? true : false;
1202
1203 for_each_slave(priv, _cpsw_adjust_link, priv, &link);
1204 return 0;
1205 }
1206
1207 static int cpsw_set_channels(struct net_device *ndev,
1208 struct ethtool_channels *chs)
1209 {
1210 return cpsw_set_channels_common(ndev, chs, cpsw_rx_handler);
1211 }
1212
1213 static const struct ethtool_ops cpsw_ethtool_ops = {
1214 .get_drvinfo = cpsw_get_drvinfo,
1215 .get_msglevel = cpsw_get_msglevel,
1216 .set_msglevel = cpsw_set_msglevel,
1217 .get_link = ethtool_op_get_link,
1218 .get_ts_info = cpsw_get_ts_info,
1219 .get_coalesce = cpsw_get_coalesce,
1220 .set_coalesce = cpsw_set_coalesce,
1221 .get_sset_count = cpsw_get_sset_count,
1222 .get_strings = cpsw_get_strings,
1223 .get_ethtool_stats = cpsw_get_ethtool_stats,
1224 .get_pauseparam = cpsw_get_pauseparam,
1225 .set_pauseparam = cpsw_set_pauseparam,
1226 .get_wol = cpsw_get_wol,
1227 .set_wol = cpsw_set_wol,
1228 .get_regs_len = cpsw_get_regs_len,
1229 .get_regs = cpsw_get_regs,
1230 .begin = cpsw_ethtool_op_begin,
1231 .complete = cpsw_ethtool_op_complete,
1232 .get_channels = cpsw_get_channels,
1233 .set_channels = cpsw_set_channels,
1234 .get_link_ksettings = cpsw_get_link_ksettings,
1235 .set_link_ksettings = cpsw_set_link_ksettings,
1236 .get_eee = cpsw_get_eee,
1237 .set_eee = cpsw_set_eee,
1238 .nway_reset = cpsw_nway_reset,
1239 .get_ringparam = cpsw_get_ringparam,
1240 .set_ringparam = cpsw_set_ringparam,
1241 };
1242
1243 static int cpsw_probe_dt(struct cpsw_platform_data *data,
1244 struct platform_device *pdev)
1245 {
1246 struct device_node *node = pdev->dev.of_node;
1247 struct device_node *slave_node;
1248 int i = 0, ret;
1249 u32 prop;
1250
1251 if (!node)
1252 return -EINVAL;
1253
1254 if (of_property_read_u32(node, "slaves", &prop)) {
1255 dev_err(&pdev->dev, "Missing slaves property in the DT.\n");
1256 return -EINVAL;
1257 }
1258 data->slaves = prop;
1259
1260 if (of_property_read_u32(node, "active_slave", &prop)) {
1261 dev_err(&pdev->dev, "Missing active_slave property in the DT.\n");
1262 return -EINVAL;
1263 }
1264 data->active_slave = prop;
1265
1266 data->slave_data = devm_kcalloc(&pdev->dev,
1267 data->slaves,
1268 sizeof(struct cpsw_slave_data),
1269 GFP_KERNEL);
1270 if (!data->slave_data)
1271 return -ENOMEM;
1272
1273 if (of_property_read_u32(node, "cpdma_channels", &prop)) {
1274 dev_err(&pdev->dev, "Missing cpdma_channels property in the DT.\n");
1275 return -EINVAL;
1276 }
1277 data->channels = prop;
1278
1279 if (of_property_read_u32(node, "ale_entries", &prop)) {
1280 dev_err(&pdev->dev, "Missing ale_entries property in the DT.\n");
1281 return -EINVAL;
1282 }
1283 data->ale_entries = prop;
1284
1285 if (of_property_read_u32(node, "bd_ram_size", &prop)) {
1286 dev_err(&pdev->dev, "Missing bd_ram_size property in the DT.\n");
1287 return -EINVAL;
1288 }
1289 data->bd_ram_size = prop;
1290
1291 if (of_property_read_u32(node, "mac_control", &prop)) {
1292 dev_err(&pdev->dev, "Missing mac_control property in the DT.\n");
1293 return -EINVAL;
1294 }
1295 data->mac_control = prop;
1296
1297 if (of_property_read_bool(node, "dual_emac"))
1298 data->dual_emac = 1;
1299
1300 /*
1301 * Populate all the child nodes here...
1302 */
1303 ret = of_platform_populate(node, NULL, NULL, &pdev->dev);
1304 /* We do not want to force this, as in some cases may not have child */
1305 if (ret)
1306 dev_warn(&pdev->dev, "Doesn't have any child node\n");
1307
1308 for_each_available_child_of_node(node, slave_node) {
1309 struct cpsw_slave_data *slave_data = data->slave_data + i;
1310 const void *mac_addr = NULL;
1311 int lenp;
1312 const __be32 *parp;
1313
1314 /* This is no slave child node, continue */
1315 if (!of_node_name_eq(slave_node, "slave"))
1316 continue;
1317
1318 slave_data->ifphy = devm_of_phy_get(&pdev->dev, slave_node,
1319 NULL);
1320 if (!IS_ENABLED(CONFIG_TI_CPSW_PHY_SEL) &&
1321 IS_ERR(slave_data->ifphy)) {
1322 ret = PTR_ERR(slave_data->ifphy);
1323 dev_err(&pdev->dev,
1324 "%d: Error retrieving port phy: %d\n", i, ret);
1325 goto err_node_put;
1326 }
1327
1328 slave_data->slave_node = slave_node;
1329 slave_data->phy_node = of_parse_phandle(slave_node,
1330 "phy-handle", 0);
1331 parp = of_get_property(slave_node, "phy_id", &lenp);
1332 if (slave_data->phy_node) {
1333 dev_dbg(&pdev->dev,
1334 "slave[%d] using phy-handle=\"%pOF\"\n",
1335 i, slave_data->phy_node);
1336 } else if (of_phy_is_fixed_link(slave_node)) {
1337 /* In the case of a fixed PHY, the DT node associated
1338 * to the PHY is the Ethernet MAC DT node.
1339 */
1340 ret = of_phy_register_fixed_link(slave_node);
1341 if (ret) {
1342 if (ret != -EPROBE_DEFER)
1343 dev_err(&pdev->dev, "failed to register fixed-link phy: %d\n", ret);
1344 goto err_node_put;
1345 }
1346 slave_data->phy_node = of_node_get(slave_node);
1347 } else if (parp) {
1348 u32 phyid;
1349 struct device_node *mdio_node;
1350 struct platform_device *mdio;
1351
1352 if (lenp != (sizeof(__be32) * 2)) {
1353 dev_err(&pdev->dev, "Invalid slave[%d] phy_id property\n", i);
1354 goto no_phy_slave;
1355 }
1356 mdio_node = of_find_node_by_phandle(be32_to_cpup(parp));
1357 phyid = be32_to_cpup(parp+1);
1358 mdio = of_find_device_by_node(mdio_node);
1359 of_node_put(mdio_node);
1360 if (!mdio) {
1361 dev_err(&pdev->dev, "Missing mdio platform device\n");
1362 ret = -EINVAL;
1363 goto err_node_put;
1364 }
1365 snprintf(slave_data->phy_id, sizeof(slave_data->phy_id),
1366 PHY_ID_FMT, mdio->name, phyid);
1367 put_device(&mdio->dev);
1368 } else {
1369 dev_err(&pdev->dev,
1370 "No slave[%d] phy_id, phy-handle, or fixed-link property\n",
1371 i);
1372 goto no_phy_slave;
1373 }
1374 ret = of_get_phy_mode(slave_node, &slave_data->phy_if);
1375 if (ret) {
1376 dev_err(&pdev->dev, "Missing or malformed slave[%d] phy-mode property\n",
1377 i);
1378 goto err_node_put;
1379 }
1380
1381 no_phy_slave:
1382 mac_addr = of_get_mac_address(slave_node);
1383 if (!IS_ERR(mac_addr)) {
1384 ether_addr_copy(slave_data->mac_addr, mac_addr);
1385 } else {
1386 ret = ti_cm_get_macid(&pdev->dev, i,
1387 slave_data->mac_addr);
1388 if (ret)
1389 goto err_node_put;
1390 }
1391 if (data->dual_emac) {
1392 if (of_property_read_u32(slave_node, "dual_emac_res_vlan",
1393 &prop)) {
1394 dev_err(&pdev->dev, "Missing dual_emac_res_vlan in DT.\n");
1395 slave_data->dual_emac_res_vlan = i+1;
1396 dev_err(&pdev->dev, "Using %d as Reserved VLAN for %d slave\n",
1397 slave_data->dual_emac_res_vlan, i);
1398 } else {
1399 slave_data->dual_emac_res_vlan = prop;
1400 }
1401 }
1402
1403 i++;
1404 if (i == data->slaves) {
1405 ret = 0;
1406 goto err_node_put;
1407 }
1408 }
1409
1410 return 0;
1411
1412 err_node_put:
1413 of_node_put(slave_node);
1414 return ret;
1415 }
1416
1417 static void cpsw_remove_dt(struct platform_device *pdev)
1418 {
1419 struct cpsw_common *cpsw = platform_get_drvdata(pdev);
1420 struct cpsw_platform_data *data = &cpsw->data;
1421 struct device_node *node = pdev->dev.of_node;
1422 struct device_node *slave_node;
1423 int i = 0;
1424
1425 for_each_available_child_of_node(node, slave_node) {
1426 struct cpsw_slave_data *slave_data = &data->slave_data[i];
1427
1428 if (!of_node_name_eq(slave_node, "slave"))
1429 continue;
1430
1431 if (of_phy_is_fixed_link(slave_node))
1432 of_phy_deregister_fixed_link(slave_node);
1433
1434 of_node_put(slave_data->phy_node);
1435
1436 i++;
1437 if (i == data->slaves) {
1438 of_node_put(slave_node);
1439 break;
1440 }
1441 }
1442
1443 of_platform_depopulate(&pdev->dev);
1444 }
1445
1446 static int cpsw_probe_dual_emac(struct cpsw_priv *priv)
1447 {
1448 struct cpsw_common *cpsw = priv->cpsw;
1449 struct cpsw_platform_data *data = &cpsw->data;
1450 struct net_device *ndev;
1451 struct cpsw_priv *priv_sl2;
1452 int ret = 0;
1453
1454 ndev = devm_alloc_etherdev_mqs(cpsw->dev, sizeof(struct cpsw_priv),
1455 CPSW_MAX_QUEUES, CPSW_MAX_QUEUES);
1456 if (!ndev) {
1457 dev_err(cpsw->dev, "cpsw: error allocating net_device\n");
1458 return -ENOMEM;
1459 }
1460
1461 priv_sl2 = netdev_priv(ndev);
1462 priv_sl2->cpsw = cpsw;
1463 priv_sl2->ndev = ndev;
1464 priv_sl2->dev = &ndev->dev;
1465 priv_sl2->msg_enable = netif_msg_init(debug_level, CPSW_DEBUG);
1466
1467 if (is_valid_ether_addr(data->slave_data[1].mac_addr)) {
1468 memcpy(priv_sl2->mac_addr, data->slave_data[1].mac_addr,
1469 ETH_ALEN);
1470 dev_info(cpsw->dev, "cpsw: Detected MACID = %pM\n",
1471 priv_sl2->mac_addr);
1472 } else {
1473 eth_random_addr(priv_sl2->mac_addr);
1474 dev_info(cpsw->dev, "cpsw: Random MACID = %pM\n",
1475 priv_sl2->mac_addr);
1476 }
1477 memcpy(ndev->dev_addr, priv_sl2->mac_addr, ETH_ALEN);
1478
1479 priv_sl2->emac_port = 1;
1480 cpsw->slaves[1].ndev = ndev;
1481 ndev->features |= NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_HW_VLAN_CTAG_RX;
1482
1483 ndev->netdev_ops = &cpsw_netdev_ops;
1484 ndev->ethtool_ops = &cpsw_ethtool_ops;
1485
1486 /* register the network device */
1487 SET_NETDEV_DEV(ndev, cpsw->dev);
1488 ndev->dev.of_node = cpsw->slaves[1].data->slave_node;
1489 ret = register_netdev(ndev);
1490 if (ret)
1491 dev_err(cpsw->dev, "cpsw: error registering net device\n");
1492
1493 return ret;
1494 }
1495
1496 static const struct of_device_id cpsw_of_mtable[] = {
1497 { .compatible = "ti,cpsw"},
1498 { .compatible = "ti,am335x-cpsw"},
1499 { .compatible = "ti,am4372-cpsw"},
1500 { .compatible = "ti,dra7-cpsw"},
1501 { /* sentinel */ },
1502 };
1503 MODULE_DEVICE_TABLE(of, cpsw_of_mtable);
1504
1505 static const struct soc_device_attribute cpsw_soc_devices[] = {
1506 { .family = "AM33xx", .revision = "ES1.0"},
1507 { /* sentinel */ }
1508 };
1509
1510 static int cpsw_probe(struct platform_device *pdev)
1511 {
1512 struct device *dev = &pdev->dev;
1513 struct clk *clk;
1514 struct cpsw_platform_data *data;
1515 struct net_device *ndev;
1516 struct cpsw_priv *priv;
1517 void __iomem *ss_regs;
1518 struct resource *ss_res;
1519 struct gpio_descs *mode;
1520 const struct soc_device_attribute *soc;
1521 struct cpsw_common *cpsw;
1522 int ret = 0, ch;
1523 int irq;
1524
1525 cpsw = devm_kzalloc(dev, sizeof(struct cpsw_common), GFP_KERNEL);
1526 if (!cpsw)
1527 return -ENOMEM;
1528
1529 platform_set_drvdata(pdev, cpsw);
1530 cpsw_slave_index = cpsw_slave_index_priv;
1531
1532 cpsw->dev = dev;
1533
1534 mode = devm_gpiod_get_array_optional(dev, "mode", GPIOD_OUT_LOW);
1535 if (IS_ERR(mode)) {
1536 ret = PTR_ERR(mode);
1537 dev_err(dev, "gpio request failed, ret %d\n", ret);
1538 return ret;
1539 }
1540
1541 clk = devm_clk_get(dev, "fck");
1542 if (IS_ERR(clk)) {
1543 ret = PTR_ERR(clk);
1544 dev_err(dev, "fck is not found %d\n", ret);
1545 return ret;
1546 }
1547 cpsw->bus_freq_mhz = clk_get_rate(clk) / 1000000;
1548
1549 ss_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1550 ss_regs = devm_ioremap_resource(dev, ss_res);
1551 if (IS_ERR(ss_regs))
1552 return PTR_ERR(ss_regs);
1553 cpsw->regs = ss_regs;
1554
1555 cpsw->wr_regs = devm_platform_ioremap_resource(pdev, 1);
1556 if (IS_ERR(cpsw->wr_regs))
1557 return PTR_ERR(cpsw->wr_regs);
1558
1559 /* RX IRQ */
1560 irq = platform_get_irq(pdev, 1);
1561 if (irq < 0)
1562 return irq;
1563 cpsw->irqs_table[0] = irq;
1564
1565 /* TX IRQ */
1566 irq = platform_get_irq(pdev, 2);
1567 if (irq < 0)
1568 return irq;
1569 cpsw->irqs_table[1] = irq;
1570
1571 /*
1572 * This may be required here for child devices.
1573 */
1574 pm_runtime_enable(dev);
1575
1576 /* Need to enable clocks with runtime PM api to access module
1577 * registers
1578 */
1579 ret = pm_runtime_get_sync(dev);
1580 if (ret < 0) {
1581 pm_runtime_put_noidle(dev);
1582 goto clean_runtime_disable_ret;
1583 }
1584
1585 ret = cpsw_probe_dt(&cpsw->data, pdev);
1586 if (ret)
1587 goto clean_dt_ret;
1588
1589 soc = soc_device_match(cpsw_soc_devices);
1590 if (soc)
1591 cpsw->quirk_irq = 1;
1592
1593 data = &cpsw->data;
1594 cpsw->slaves = devm_kcalloc(dev,
1595 data->slaves, sizeof(struct cpsw_slave),
1596 GFP_KERNEL);
1597 if (!cpsw->slaves) {
1598 ret = -ENOMEM;
1599 goto clean_dt_ret;
1600 }
1601
1602 cpsw->rx_packet_max = max(rx_packet_max, CPSW_MAX_PACKET_SIZE);
1603 cpsw->descs_pool_size = descs_pool_size;
1604
1605 ret = cpsw_init_common(cpsw, ss_regs, ale_ageout,
1606 ss_res->start + CPSW2_BD_OFFSET,
1607 descs_pool_size);
1608 if (ret)
1609 goto clean_dt_ret;
1610
1611 ch = cpsw->quirk_irq ? 0 : 7;
1612 cpsw->txv[0].ch = cpdma_chan_create(cpsw->dma, ch, cpsw_tx_handler, 0);
1613 if (IS_ERR(cpsw->txv[0].ch)) {
1614 dev_err(dev, "error initializing tx dma channel\n");
1615 ret = PTR_ERR(cpsw->txv[0].ch);
1616 goto clean_cpts;
1617 }
1618
1619 cpsw->rxv[0].ch = cpdma_chan_create(cpsw->dma, 0, cpsw_rx_handler, 1);
1620 if (IS_ERR(cpsw->rxv[0].ch)) {
1621 dev_err(dev, "error initializing rx dma channel\n");
1622 ret = PTR_ERR(cpsw->rxv[0].ch);
1623 goto clean_cpts;
1624 }
1625 cpsw_split_res(cpsw);
1626
1627 /* setup netdev */
1628 ndev = devm_alloc_etherdev_mqs(dev, sizeof(struct cpsw_priv),
1629 CPSW_MAX_QUEUES, CPSW_MAX_QUEUES);
1630 if (!ndev) {
1631 dev_err(dev, "error allocating net_device\n");
1632 goto clean_cpts;
1633 }
1634
1635 priv = netdev_priv(ndev);
1636 priv->cpsw = cpsw;
1637 priv->ndev = ndev;
1638 priv->dev = dev;
1639 priv->msg_enable = netif_msg_init(debug_level, CPSW_DEBUG);
1640 priv->emac_port = 0;
1641
1642 if (is_valid_ether_addr(data->slave_data[0].mac_addr)) {
1643 memcpy(priv->mac_addr, data->slave_data[0].mac_addr, ETH_ALEN);
1644 dev_info(dev, "Detected MACID = %pM\n", priv->mac_addr);
1645 } else {
1646 eth_random_addr(priv->mac_addr);
1647 dev_info(dev, "Random MACID = %pM\n", priv->mac_addr);
1648 }
1649
1650 memcpy(ndev->dev_addr, priv->mac_addr, ETH_ALEN);
1651
1652 cpsw->slaves[0].ndev = ndev;
1653
1654 ndev->features |= NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_HW_VLAN_CTAG_RX;
1655
1656 ndev->netdev_ops = &cpsw_netdev_ops;
1657 ndev->ethtool_ops = &cpsw_ethtool_ops;
1658 netif_napi_add(ndev, &cpsw->napi_rx,
1659 cpsw->quirk_irq ? cpsw_rx_poll : cpsw_rx_mq_poll,
1660 CPSW_POLL_WEIGHT);
1661 netif_tx_napi_add(ndev, &cpsw->napi_tx,
1662 cpsw->quirk_irq ? cpsw_tx_poll : cpsw_tx_mq_poll,
1663 CPSW_POLL_WEIGHT);
1664
1665 /* register the network device */
1666 SET_NETDEV_DEV(ndev, dev);
1667 ndev->dev.of_node = cpsw->slaves[0].data->slave_node;
1668 ret = register_netdev(ndev);
1669 if (ret) {
1670 dev_err(dev, "error registering net device\n");
1671 ret = -ENODEV;
1672 goto clean_cpts;
1673 }
1674
1675 if (cpsw->data.dual_emac) {
1676 ret = cpsw_probe_dual_emac(priv);
1677 if (ret) {
1678 cpsw_err(priv, probe, "error probe slave 2 emac interface\n");
1679 goto clean_unregister_netdev_ret;
1680 }
1681 }
1682
1683 /* Grab RX and TX IRQs. Note that we also have RX_THRESHOLD and
1684 * MISC IRQs which are always kept disabled with this driver so
1685 * we will not request them.
1686 *
1687 * If anyone wants to implement support for those, make sure to
1688 * first request and append them to irqs_table array.
1689 */
1690 ret = devm_request_irq(dev, cpsw->irqs_table[0], cpsw_rx_interrupt,
1691 0, dev_name(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
1698 ret = devm_request_irq(dev, cpsw->irqs_table[1], cpsw_tx_interrupt,
1699 0, dev_name(&pdev->dev), cpsw);
1700 if (ret < 0) {
1701 dev_err(dev, "error attaching irq (%d)\n", ret);
1702 goto clean_unregister_netdev_ret;
1703 }
1704
1705 cpsw_notice(priv, probe,
1706 "initialized device (regs %pa, irq %d, pool size %d)\n",
1707 &ss_res->start, cpsw->irqs_table[0], descs_pool_size);
1708
1709 pm_runtime_put(&pdev->dev);
1710
1711 return 0;
1712
1713 clean_unregister_netdev_ret:
1714 unregister_netdev(ndev);
1715 clean_cpts:
1716 cpts_release(cpsw->cpts);
1717 cpdma_ctlr_destroy(cpsw->dma);
1718 clean_dt_ret:
1719 cpsw_remove_dt(pdev);
1720 pm_runtime_put_sync(&pdev->dev);
1721 clean_runtime_disable_ret:
1722 pm_runtime_disable(&pdev->dev);
1723 return ret;
1724 }
1725
1726 static int cpsw_remove(struct platform_device *pdev)
1727 {
1728 struct cpsw_common *cpsw = platform_get_drvdata(pdev);
1729 int i, ret;
1730
1731 ret = pm_runtime_get_sync(&pdev->dev);
1732 if (ret < 0) {
1733 pm_runtime_put_noidle(&pdev->dev);
1734 return ret;
1735 }
1736
1737 for (i = 0; i < cpsw->data.slaves; i++)
1738 if (cpsw->slaves[i].ndev)
1739 unregister_netdev(cpsw->slaves[i].ndev);
1740
1741 cpts_release(cpsw->cpts);
1742 cpdma_ctlr_destroy(cpsw->dma);
1743 cpsw_remove_dt(pdev);
1744 pm_runtime_put_sync(&pdev->dev);
1745 pm_runtime_disable(&pdev->dev);
1746 return 0;
1747 }
1748
1749 #ifdef CONFIG_PM_SLEEP
1750 static int cpsw_suspend(struct device *dev)
1751 {
1752 struct cpsw_common *cpsw = dev_get_drvdata(dev);
1753 int i;
1754
1755 for (i = 0; i < cpsw->data.slaves; i++)
1756 if (cpsw->slaves[i].ndev)
1757 if (netif_running(cpsw->slaves[i].ndev))
1758 cpsw_ndo_stop(cpsw->slaves[i].ndev);
1759
1760 /* Select sleep pin state */
1761 pinctrl_pm_select_sleep_state(dev);
1762
1763 return 0;
1764 }
1765
1766 static int cpsw_resume(struct device *dev)
1767 {
1768 struct cpsw_common *cpsw = dev_get_drvdata(dev);
1769 int i;
1770
1771 /* Select default pin state */
1772 pinctrl_pm_select_default_state(dev);
1773
1774 /* shut up ASSERT_RTNL() warning in netif_set_real_num_tx/rx_queues */
1775 rtnl_lock();
1776
1777 for (i = 0; i < cpsw->data.slaves; i++)
1778 if (cpsw->slaves[i].ndev)
1779 if (netif_running(cpsw->slaves[i].ndev))
1780 cpsw_ndo_open(cpsw->slaves[i].ndev);
1781
1782 rtnl_unlock();
1783
1784 return 0;
1785 }
1786 #endif
1787
1788 static SIMPLE_DEV_PM_OPS(cpsw_pm_ops, cpsw_suspend, cpsw_resume);
1789
1790 static struct platform_driver cpsw_driver = {
1791 .driver = {
1792 .name = "cpsw",
1793 .pm = &cpsw_pm_ops,
1794 .of_match_table = cpsw_of_mtable,
1795 },
1796 .probe = cpsw_probe,
1797 .remove = cpsw_remove,
1798 };
1799
1800 module_platform_driver(cpsw_driver);
1801
1802 MODULE_LICENSE("GPL");
1803 MODULE_AUTHOR("Cyril Chemparathy <cyril@ti.com>");
1804 MODULE_AUTHOR("Mugunthan V N <mugunthanvnm@ti.com>");
1805 MODULE_DESCRIPTION("TI CPSW Ethernet driver");
Linux with added FPC-III support