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WIP FPC-III support
[linux/fpc-iii.git] / drivers / net / ethernet / ti / cpsw_new.c
blob2f5e0ad23ad7cf13a090471f553c656063ca285a
1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * Texas Instruments Ethernet Switch Driver
4 *
5 * Copyright (C) 2019 Texas Instruments
6 */
7
8 #include <linux/io.h>
9 #include <linux/clk.h>
10 #include <linux/timer.h>
11 #include <linux/module.h>
12 #include <linux/irqreturn.h>
13 #include <linux/interrupt.h>
14 #include <linux/if_ether.h>
15 #include <linux/etherdevice.h>
16 #include <linux/net_tstamp.h>
17 #include <linux/phy.h>
18 #include <linux/phy/phy.h>
19 #include <linux/delay.h>
20 #include <linux/pinctrl/consumer.h>
21 #include <linux/pm_runtime.h>
22 #include <linux/gpio/consumer.h>
23 #include <linux/of.h>
24 #include <linux/of_mdio.h>
25 #include <linux/of_net.h>
26 #include <linux/of_device.h>
27 #include <linux/if_vlan.h>
28 #include <linux/kmemleak.h>
29 #include <linux/sys_soc.h>
30
31 #include <net/page_pool.h>
32 #include <net/pkt_cls.h>
33 #include <net/devlink.h>
34
35 #include "cpsw.h"
36 #include "cpsw_ale.h"
37 #include "cpsw_priv.h"
38 #include "cpsw_sl.h"
39 #include "cpsw_switchdev.h"
40 #include "cpts.h"
41 #include "davinci_cpdma.h"
42
43 #include <net/pkt_sched.h>
44
45 static int debug_level;
46 static int ale_ageout = CPSW_ALE_AGEOUT_DEFAULT;
47 static int rx_packet_max = CPSW_MAX_PACKET_SIZE;
48 static int descs_pool_size = CPSW_CPDMA_DESCS_POOL_SIZE_DEFAULT;
49
50 struct cpsw_devlink {
51 struct cpsw_common *cpsw;
52 };
53
54 enum cpsw_devlink_param_id {
55 CPSW_DEVLINK_PARAM_ID_BASE = DEVLINK_PARAM_GENERIC_ID_MAX,
56 CPSW_DL_PARAM_SWITCH_MODE,
57 CPSW_DL_PARAM_ALE_BYPASS,
58 };
59
60 /* struct cpsw_common is not needed, kept here for compatibility
61 * reasons witrh the old driver
62 */
63 static int cpsw_slave_index_priv(struct cpsw_common *cpsw,
64 struct cpsw_priv *priv)
65 {
66 if (priv->emac_port == HOST_PORT_NUM)
67 return -1;
68
69 return priv->emac_port - 1;
70 }
71
72 static bool cpsw_is_switch_en(struct cpsw_common *cpsw)
73 {
74 return !cpsw->data.dual_emac;
75 }
76
77 static void cpsw_set_promiscious(struct net_device *ndev, bool enable)
78 {
79 struct cpsw_common *cpsw = ndev_to_cpsw(ndev);
80 bool enable_uni = false;
81 int i;
82
83 if (cpsw_is_switch_en(cpsw))
84 return;
85
86 /* Enabling promiscuous mode for one interface will be
87 * common for both the interface as the interface shares
88 * the same hardware resource.
89 */
90 for (i = 0; i < cpsw->data.slaves; i++)
91 if (cpsw->slaves[i].ndev &&
92 (cpsw->slaves[i].ndev->flags & IFF_PROMISC))
93 enable_uni = true;
94
95 if (!enable && enable_uni) {
96 enable = enable_uni;
97 dev_dbg(cpsw->dev, "promiscuity not disabled as the other interface is still in promiscuity mode\n");
98 }
99
100 if (enable) {
101 /* Enable unknown unicast, reg/unreg mcast */
102 cpsw_ale_control_set(cpsw->ale, HOST_PORT_NUM,
103 ALE_P0_UNI_FLOOD, 1);
104
105 dev_dbg(cpsw->dev, "promiscuity enabled\n");
106 } else {
107 /* Disable unknown unicast */
108 cpsw_ale_control_set(cpsw->ale, HOST_PORT_NUM,
109 ALE_P0_UNI_FLOOD, 0);
110 dev_dbg(cpsw->dev, "promiscuity disabled\n");
111 }
112 }
113
114 /**
115 * cpsw_set_mc - adds multicast entry to the table if it's not added or deletes
116 * if it's not deleted
117 * @ndev: device to sync
118 * @addr: address to be added or deleted
119 * @vid: vlan id, if vid < 0 set/unset address for real device
120 * @add: add address if the flag is set or remove otherwise
121 */
122 static int cpsw_set_mc(struct net_device *ndev, const u8 *addr,
123 int vid, int add)
124 {
125 struct cpsw_priv *priv = netdev_priv(ndev);
126 struct cpsw_common *cpsw = priv->cpsw;
127 int mask, flags, ret, slave_no;
128
129 slave_no = cpsw_slave_index(cpsw, priv);
130 if (vid < 0)
131 vid = cpsw->slaves[slave_no].port_vlan;
132
133 mask = ALE_PORT_HOST;
134 flags = vid ? ALE_VLAN : 0;
135
136 if (add)
137 ret = cpsw_ale_add_mcast(cpsw->ale, addr, mask, flags, vid, 0);
138 else
139 ret = cpsw_ale_del_mcast(cpsw->ale, addr, 0, flags, vid);
140
141 return ret;
142 }
143
144 static int cpsw_update_vlan_mc(struct net_device *vdev, int vid, void *ctx)
145 {
146 struct addr_sync_ctx *sync_ctx = ctx;
147 struct netdev_hw_addr *ha;
148 int found = 0, ret = 0;
149
150 if (!vdev || !(vdev->flags & IFF_UP))
151 return 0;
152
153 /* vlan address is relevant if its sync_cnt != 0 */
154 netdev_for_each_mc_addr(ha, vdev) {
155 if (ether_addr_equal(ha->addr, sync_ctx->addr)) {
156 found = ha->sync_cnt;
157 break;
158 }
159 }
160
161 if (found)
162 sync_ctx->consumed++;
163
164 if (sync_ctx->flush) {
165 if (!found)
166 cpsw_set_mc(sync_ctx->ndev, sync_ctx->addr, vid, 0);
167 return 0;
168 }
169
170 if (found)
171 ret = cpsw_set_mc(sync_ctx->ndev, sync_ctx->addr, vid, 1);
172
173 return ret;
174 }
175
176 static int cpsw_add_mc_addr(struct net_device *ndev, const u8 *addr, int num)
177 {
178 struct addr_sync_ctx sync_ctx;
179 int ret;
180
181 sync_ctx.consumed = 0;
182 sync_ctx.addr = addr;
183 sync_ctx.ndev = ndev;
184 sync_ctx.flush = 0;
185
186 ret = vlan_for_each(ndev, cpsw_update_vlan_mc, &sync_ctx);
187 if (sync_ctx.consumed < num && !ret)
188 ret = cpsw_set_mc(ndev, addr, -1, 1);
189
190 return ret;
191 }
192
193 static int cpsw_del_mc_addr(struct net_device *ndev, const u8 *addr, int num)
194 {
195 struct addr_sync_ctx sync_ctx;
196
197 sync_ctx.consumed = 0;
198 sync_ctx.addr = addr;
199 sync_ctx.ndev = ndev;
200 sync_ctx.flush = 1;
201
202 vlan_for_each(ndev, cpsw_update_vlan_mc, &sync_ctx);
203 if (sync_ctx.consumed == num)
204 cpsw_set_mc(ndev, addr, -1, 0);
205
206 return 0;
207 }
208
209 static int cpsw_purge_vlan_mc(struct net_device *vdev, int vid, void *ctx)
210 {
211 struct addr_sync_ctx *sync_ctx = ctx;
212 struct netdev_hw_addr *ha;
213 int found = 0;
214
215 if (!vdev || !(vdev->flags & IFF_UP))
216 return 0;
217
218 /* vlan address is relevant if its sync_cnt != 0 */
219 netdev_for_each_mc_addr(ha, vdev) {
220 if (ether_addr_equal(ha->addr, sync_ctx->addr)) {
221 found = ha->sync_cnt;
222 break;
223 }
224 }
225
226 if (!found)
227 return 0;
228
229 sync_ctx->consumed++;
230 cpsw_set_mc(sync_ctx->ndev, sync_ctx->addr, vid, 0);
231 return 0;
232 }
233
234 static int cpsw_purge_all_mc(struct net_device *ndev, const u8 *addr, int num)
235 {
236 struct addr_sync_ctx sync_ctx;
237
238 sync_ctx.addr = addr;
239 sync_ctx.ndev = ndev;
240 sync_ctx.consumed = 0;
241
242 vlan_for_each(ndev, cpsw_purge_vlan_mc, &sync_ctx);
243 if (sync_ctx.consumed < num)
244 cpsw_set_mc(ndev, addr, -1, 0);
245
246 return 0;
247 }
248
249 static void cpsw_ndo_set_rx_mode(struct net_device *ndev)
250 {
251 struct cpsw_priv *priv = netdev_priv(ndev);
252 struct cpsw_common *cpsw = priv->cpsw;
253
254 if (ndev->flags & IFF_PROMISC) {
255 /* Enable promiscuous mode */
256 cpsw_set_promiscious(ndev, true);
257 cpsw_ale_set_allmulti(cpsw->ale, IFF_ALLMULTI, priv->emac_port);
258 return;
259 }
260
261 /* Disable promiscuous mode */
262 cpsw_set_promiscious(ndev, false);
263
264 /* Restore allmulti on vlans if necessary */
265 cpsw_ale_set_allmulti(cpsw->ale,
266 ndev->flags & IFF_ALLMULTI, priv->emac_port);
267
268 /* add/remove mcast address either for real netdev or for vlan */
269 __hw_addr_ref_sync_dev(&ndev->mc, ndev, cpsw_add_mc_addr,
270 cpsw_del_mc_addr);
271 }
272
273 static unsigned int cpsw_rxbuf_total_len(unsigned int len)
274 {
275 len += CPSW_HEADROOM;
276 len += SKB_DATA_ALIGN(sizeof(struct skb_shared_info));
277
278 return SKB_DATA_ALIGN(len);
279 }
280
281 static void cpsw_rx_handler(void *token, int len, int status)
282 {
283 struct page *new_page, *page = token;
284 void *pa = page_address(page);
285 int headroom = CPSW_HEADROOM;
286 struct cpsw_meta_xdp *xmeta;
287 struct cpsw_common *cpsw;
288 struct net_device *ndev;
289 int port, ch, pkt_size;
290 struct cpsw_priv *priv;
291 struct page_pool *pool;
292 struct sk_buff *skb;
293 struct xdp_buff xdp;
294 int ret = 0;
295 dma_addr_t dma;
296
297 xmeta = pa + CPSW_XMETA_OFFSET;
298 cpsw = ndev_to_cpsw(xmeta->ndev);
299 ndev = xmeta->ndev;
300 pkt_size = cpsw->rx_packet_max;
301 ch = xmeta->ch;
302
303 if (status >= 0) {
304 port = CPDMA_RX_SOURCE_PORT(status);
305 if (port)
306 ndev = cpsw->slaves[--port].ndev;
307 }
308
309 priv = netdev_priv(ndev);
310 pool = cpsw->page_pool[ch];
311
312 if (unlikely(status < 0) || unlikely(!netif_running(ndev))) {
313 /* In dual emac mode check for all interfaces */
314 if (cpsw->usage_count && status >= 0) {
315 /* The packet received is for the interface which
316 * is already down and the other interface is up
317 * and running, instead of freeing which results
318 * in reducing of the number of rx descriptor in
319 * DMA engine, requeue page back to cpdma.
320 */
321 new_page = page;
322 goto requeue;
323 }
324
325 /* the interface is going down, pages are purged */
326 page_pool_recycle_direct(pool, page);
327 return;
328 }
329
330 new_page = page_pool_dev_alloc_pages(pool);
331 if (unlikely(!new_page)) {
332 new_page = page;
333 ndev->stats.rx_dropped++;
334 goto requeue;
335 }
336
337 if (priv->xdp_prog) {
338 if (status & CPDMA_RX_VLAN_ENCAP) {
339 xdp.data = pa + CPSW_HEADROOM +
340 CPSW_RX_VLAN_ENCAP_HDR_SIZE;
341 xdp.data_end = xdp.data + len -
342 CPSW_RX_VLAN_ENCAP_HDR_SIZE;
343 } else {
344 xdp.data = pa + CPSW_HEADROOM;
345 xdp.data_end = xdp.data + len;
346 }
347
348 xdp_set_data_meta_invalid(&xdp);
349
350 xdp.data_hard_start = pa;
351 xdp.rxq = &priv->xdp_rxq[ch];
352 xdp.frame_sz = PAGE_SIZE;
353
354 ret = cpsw_run_xdp(priv, ch, &xdp, page, priv->emac_port);
355 if (ret != CPSW_XDP_PASS)
356 goto requeue;
357
358 /* XDP prog might have changed packet data and boundaries */
359 len = xdp.data_end - xdp.data;
360 headroom = xdp.data - xdp.data_hard_start;
361
362 /* XDP prog can modify vlan tag, so can't use encap header */
363 status &= ~CPDMA_RX_VLAN_ENCAP;
364 }
365
366 /* pass skb to netstack if no XDP prog or returned XDP_PASS */
367 skb = build_skb(pa, cpsw_rxbuf_total_len(pkt_size));
368 if (!skb) {
369 ndev->stats.rx_dropped++;
370 page_pool_recycle_direct(pool, page);
371 goto requeue;
372 }
373
374 skb->offload_fwd_mark = priv->offload_fwd_mark;
375 skb_reserve(skb, headroom);
376 skb_put(skb, len);
377 skb->dev = ndev;
378 if (status & CPDMA_RX_VLAN_ENCAP)
379 cpsw_rx_vlan_encap(skb);
380 if (priv->rx_ts_enabled)
381 cpts_rx_timestamp(cpsw->cpts, skb);
382 skb->protocol = eth_type_trans(skb, ndev);
383
384 /* unmap page as no netstack skb page recycling */
385 page_pool_release_page(pool, page);
386 netif_receive_skb(skb);
387
388 ndev->stats.rx_bytes += len;
389 ndev->stats.rx_packets++;
390
391 requeue:
392 xmeta = page_address(new_page) + CPSW_XMETA_OFFSET;
393 xmeta->ndev = ndev;
394 xmeta->ch = ch;
395
396 dma = page_pool_get_dma_addr(new_page) + CPSW_HEADROOM;
397 ret = cpdma_chan_submit_mapped(cpsw->rxv[ch].ch, new_page, dma,
398 pkt_size, 0);
399 if (ret < 0) {
400 WARN_ON(ret == -ENOMEM);
401 page_pool_recycle_direct(pool, new_page);
402 }
403 }
404
405 static int cpsw_add_vlan_ale_entry(struct cpsw_priv *priv,
406 unsigned short vid)
407 {
408 struct cpsw_common *cpsw = priv->cpsw;
409 int unreg_mcast_mask = 0;
410 int mcast_mask;
411 u32 port_mask;
412 int ret;
413
414 port_mask = (1 << priv->emac_port) | ALE_PORT_HOST;
415
416 mcast_mask = ALE_PORT_HOST;
417 if (priv->ndev->flags & IFF_ALLMULTI)
418 unreg_mcast_mask = mcast_mask;
419
420 ret = cpsw_ale_add_vlan(cpsw->ale, vid, port_mask, 0, port_mask,
421 unreg_mcast_mask);
422 if (ret != 0)
423 return ret;
424
425 ret = cpsw_ale_add_ucast(cpsw->ale, priv->mac_addr,
426 HOST_PORT_NUM, ALE_VLAN, vid);
427 if (ret != 0)
428 goto clean_vid;
429
430 ret = cpsw_ale_add_mcast(cpsw->ale, priv->ndev->broadcast,
431 mcast_mask, ALE_VLAN, vid, 0);
432 if (ret != 0)
433 goto clean_vlan_ucast;
434 return 0;
435
436 clean_vlan_ucast:
437 cpsw_ale_del_ucast(cpsw->ale, priv->mac_addr,
438 HOST_PORT_NUM, ALE_VLAN, vid);
439 clean_vid:
440 cpsw_ale_del_vlan(cpsw->ale, vid, 0);
441 return ret;
442 }
443
444 static int cpsw_ndo_vlan_rx_add_vid(struct net_device *ndev,
445 __be16 proto, u16 vid)
446 {
447 struct cpsw_priv *priv = netdev_priv(ndev);
448 struct cpsw_common *cpsw = priv->cpsw;
449 int ret, i;
450
451 if (cpsw_is_switch_en(cpsw)) {
452 dev_dbg(cpsw->dev, ".ndo_vlan_rx_add_vid called in switch mode\n");
453 return 0;
454 }
455
456 if (vid == cpsw->data.default_vlan)
457 return 0;
458
459 ret = pm_runtime_get_sync(cpsw->dev);
460 if (ret < 0) {
461 pm_runtime_put_noidle(cpsw->dev);
462 return ret;
463 }
464
465 /* In dual EMAC, reserved VLAN id should not be used for
466 * creating VLAN interfaces as this can break the dual
467 * EMAC port separation
468 */
469 for (i = 0; i < cpsw->data.slaves; i++) {
470 if (cpsw->slaves[i].ndev &&
471 vid == cpsw->slaves[i].port_vlan) {
472 ret = -EINVAL;
473 goto err;
474 }
475 }
476
477 dev_dbg(priv->dev, "Adding vlanid %d to vlan filter\n", vid);
478 ret = cpsw_add_vlan_ale_entry(priv, vid);
479 err:
480 pm_runtime_put(cpsw->dev);
481 return ret;
482 }
483
484 static int cpsw_restore_vlans(struct net_device *vdev, int vid, void *arg)
485 {
486 struct cpsw_priv *priv = arg;
487
488 if (!vdev || !vid)
489 return 0;
490
491 cpsw_ndo_vlan_rx_add_vid(priv->ndev, 0, vid);
492 return 0;
493 }
494
495 /* restore resources after port reset */
496 static void cpsw_restore(struct cpsw_priv *priv)
497 {
498 struct cpsw_common *cpsw = priv->cpsw;
499
500 /* restore vlan configurations */
501 vlan_for_each(priv->ndev, cpsw_restore_vlans, priv);
502
503 /* restore MQPRIO offload */
504 cpsw_mqprio_resume(&cpsw->slaves[priv->emac_port - 1], priv);
505
506 /* restore CBS offload */
507 cpsw_cbs_resume(&cpsw->slaves[priv->emac_port - 1], priv);
508 }
509
510 static void cpsw_init_stp_ale_entry(struct cpsw_common *cpsw)
511 {
512 char stpa[] = {0x01, 0x80, 0xc2, 0x0, 0x0, 0x0};
513
514 cpsw_ale_add_mcast(cpsw->ale, stpa,
515 ALE_PORT_HOST, ALE_SUPER, 0,
516 ALE_MCAST_BLOCK_LEARN_FWD);
517 }
518
519 static void cpsw_init_host_port_switch(struct cpsw_common *cpsw)
520 {
521 int vlan = cpsw->data.default_vlan;
522
523 writel(CPSW_FIFO_NORMAL_MODE, &cpsw->host_port_regs->tx_in_ctl);
524
525 writel(vlan, &cpsw->host_port_regs->port_vlan);
526
527 cpsw_ale_add_vlan(cpsw->ale, vlan, ALE_ALL_PORTS,
528 ALE_ALL_PORTS, ALE_ALL_PORTS,
529 ALE_PORT_1 | ALE_PORT_2);
530
531 cpsw_init_stp_ale_entry(cpsw);
532
533 cpsw_ale_control_set(cpsw->ale, HOST_PORT_NUM, ALE_P0_UNI_FLOOD, 1);
534 dev_dbg(cpsw->dev, "Set P0_UNI_FLOOD\n");
535 cpsw_ale_control_set(cpsw->ale, HOST_PORT_NUM, ALE_PORT_NOLEARN, 0);
536 }
537
538 static void cpsw_init_host_port_dual_mac(struct cpsw_common *cpsw)
539 {
540 int vlan = cpsw->data.default_vlan;
541
542 writel(CPSW_FIFO_DUAL_MAC_MODE, &cpsw->host_port_regs->tx_in_ctl);
543
544 cpsw_ale_control_set(cpsw->ale, HOST_PORT_NUM, ALE_P0_UNI_FLOOD, 0);
545 dev_dbg(cpsw->dev, "unset P0_UNI_FLOOD\n");
546
547 writel(vlan, &cpsw->host_port_regs->port_vlan);
548
549 cpsw_ale_add_vlan(cpsw->ale, vlan, ALE_ALL_PORTS, ALE_ALL_PORTS, 0, 0);
550 /* learning make no sense in dual_mac mode */
551 cpsw_ale_control_set(cpsw->ale, HOST_PORT_NUM, ALE_PORT_NOLEARN, 1);
552 }
553
554 static void cpsw_init_host_port(struct cpsw_priv *priv)
555 {
556 struct cpsw_common *cpsw = priv->cpsw;
557 u32 control_reg;
558
559 /* soft reset the controller and initialize ale */
560 soft_reset("cpsw", &cpsw->regs->soft_reset);
561 cpsw_ale_start(cpsw->ale);
562
563 /* switch to vlan unaware mode */
564 cpsw_ale_control_set(cpsw->ale, HOST_PORT_NUM, ALE_VLAN_AWARE,
565 CPSW_ALE_VLAN_AWARE);
566 control_reg = readl(&cpsw->regs->control);
567 control_reg |= CPSW_VLAN_AWARE | CPSW_RX_VLAN_ENCAP;
568 writel(control_reg, &cpsw->regs->control);
569
570 /* setup host port priority mapping */
571 writel_relaxed(CPDMA_TX_PRIORITY_MAP,
572 &cpsw->host_port_regs->cpdma_tx_pri_map);
573 writel_relaxed(0, &cpsw->host_port_regs->cpdma_rx_chan_map);
574
575 /* disable priority elevation */
576 writel_relaxed(0, &cpsw->regs->ptype);
577
578 /* enable statistics collection only on all ports */
579 writel_relaxed(0x7, &cpsw->regs->stat_port_en);
580
581 /* Enable internal fifo flow control */
582 writel(0x7, &cpsw->regs->flow_control);
583
584 if (cpsw_is_switch_en(cpsw))
585 cpsw_init_host_port_switch(cpsw);
586 else
587 cpsw_init_host_port_dual_mac(cpsw);
588
589 cpsw_ale_control_set(cpsw->ale, HOST_PORT_NUM,
590 ALE_PORT_STATE, ALE_PORT_STATE_FORWARD);
591 }
592
593 static void cpsw_port_add_dual_emac_def_ale_entries(struct cpsw_priv *priv,
594 struct cpsw_slave *slave)
595 {
596 u32 port_mask = 1 << priv->emac_port | ALE_PORT_HOST;
597 struct cpsw_common *cpsw = priv->cpsw;
598 u32 reg;
599
600 reg = (cpsw->version == CPSW_VERSION_1) ? CPSW1_PORT_VLAN :
601 CPSW2_PORT_VLAN;
602 slave_write(slave, slave->port_vlan, reg);
603
604 cpsw_ale_add_vlan(cpsw->ale, slave->port_vlan, port_mask,
605 port_mask, port_mask, 0);
606 cpsw_ale_add_mcast(cpsw->ale, priv->ndev->broadcast,
607 ALE_PORT_HOST, ALE_VLAN, slave->port_vlan,
608 ALE_MCAST_FWD);
609 cpsw_ale_add_ucast(cpsw->ale, priv->mac_addr,
610 HOST_PORT_NUM, ALE_VLAN |
611 ALE_SECURE, slave->port_vlan);
612 cpsw_ale_control_set(cpsw->ale, priv->emac_port,
613 ALE_PORT_DROP_UNKNOWN_VLAN, 1);
614 /* learning make no sense in dual_mac mode */
615 cpsw_ale_control_set(cpsw->ale, priv->emac_port,
616 ALE_PORT_NOLEARN, 1);
617 }
618
619 static void cpsw_port_add_switch_def_ale_entries(struct cpsw_priv *priv,
620 struct cpsw_slave *slave)
621 {
622 u32 port_mask = 1 << priv->emac_port | ALE_PORT_HOST;
623 struct cpsw_common *cpsw = priv->cpsw;
624 u32 reg;
625
626 cpsw_ale_control_set(cpsw->ale, priv->emac_port,
627 ALE_PORT_DROP_UNKNOWN_VLAN, 0);
628 cpsw_ale_control_set(cpsw->ale, priv->emac_port,
629 ALE_PORT_NOLEARN, 0);
630 /* disabling SA_UPDATE required to make stp work, without this setting
631 * Host MAC addresses will jump between ports.
632 * As per TRM MAC address can be defined as unicast supervisory (super)
633 * by setting both (ALE_BLOCKED | ALE_SECURE) which should prevent
634 * SA_UPDATE, but HW seems works incorrectly and setting ALE_SECURE
635 * causes STP packets to be dropped due to ingress filter
636 * if (source address found) and (secure) and
637 * (receive port number != port_number))
638 * then discard the packet
639 */
640 cpsw_ale_control_set(cpsw->ale, priv->emac_port,
641 ALE_PORT_NO_SA_UPDATE, 1);
642
643 cpsw_ale_add_mcast(cpsw->ale, priv->ndev->broadcast,
644 port_mask, ALE_VLAN, slave->port_vlan,
645 ALE_MCAST_FWD_2);
646 cpsw_ale_add_ucast(cpsw->ale, priv->mac_addr,
647 HOST_PORT_NUM, ALE_VLAN, slave->port_vlan);
648
649 reg = (cpsw->version == CPSW_VERSION_1) ? CPSW1_PORT_VLAN :
650 CPSW2_PORT_VLAN;
651 slave_write(slave, slave->port_vlan, reg);
652 }
653
654 static void cpsw_adjust_link(struct net_device *ndev)
655 {
656 struct cpsw_priv *priv = netdev_priv(ndev);
657 struct cpsw_common *cpsw = priv->cpsw;
658 struct cpsw_slave *slave;
659 struct phy_device *phy;
660 u32 mac_control = 0;
661
662 slave = &cpsw->slaves[priv->emac_port - 1];
663 phy = slave->phy;
664
665 if (!phy)
666 return;
667
668 if (phy->link) {
669 mac_control = CPSW_SL_CTL_GMII_EN;
670
671 if (phy->speed == 1000)
672 mac_control |= CPSW_SL_CTL_GIG;
673 if (phy->duplex)
674 mac_control |= CPSW_SL_CTL_FULLDUPLEX;
675
676 /* set speed_in input in case RMII mode is used in 100Mbps */
677 if (phy->speed == 100)
678 mac_control |= CPSW_SL_CTL_IFCTL_A;
679 /* in band mode only works in 10Mbps RGMII mode */
680 else if ((phy->speed == 10) && phy_interface_is_rgmii(phy))
681 mac_control |= CPSW_SL_CTL_EXT_EN; /* In Band mode */
682
683 if (priv->rx_pause)
684 mac_control |= CPSW_SL_CTL_RX_FLOW_EN;
685
686 if (priv->tx_pause)
687 mac_control |= CPSW_SL_CTL_TX_FLOW_EN;
688
689 if (mac_control != slave->mac_control)
690 cpsw_sl_ctl_set(slave->mac_sl, mac_control);
691
692 /* enable forwarding */
693 cpsw_ale_control_set(cpsw->ale, priv->emac_port,
694 ALE_PORT_STATE, ALE_PORT_STATE_FORWARD);
695
696 netif_tx_wake_all_queues(ndev);
697
698 if (priv->shp_cfg_speed &&
699 priv->shp_cfg_speed != slave->phy->speed &&
700 !cpsw_shp_is_off(priv))
701 dev_warn(priv->dev, "Speed was changed, CBS shaper speeds are changed!");
702 } else {
703 netif_tx_stop_all_queues(ndev);
704
705 mac_control = 0;
706 /* disable forwarding */
707 cpsw_ale_control_set(cpsw->ale, priv->emac_port,
708 ALE_PORT_STATE, ALE_PORT_STATE_DISABLE);
709
710 cpsw_sl_wait_for_idle(slave->mac_sl, 100);
711
712 cpsw_sl_ctl_reset(slave->mac_sl);
713 }
714
715 if (mac_control != slave->mac_control)
716 phy_print_status(phy);
717
718 slave->mac_control = mac_control;
719
720 if (phy->link && cpsw_need_resplit(cpsw))
721 cpsw_split_res(cpsw);
722 }
723
724 static void cpsw_slave_open(struct cpsw_slave *slave, struct cpsw_priv *priv)
725 {
726 struct cpsw_common *cpsw = priv->cpsw;
727 struct phy_device *phy;
728
729 cpsw_sl_reset(slave->mac_sl, 100);
730 cpsw_sl_ctl_reset(slave->mac_sl);
731
732 /* setup priority mapping */
733 cpsw_sl_reg_write(slave->mac_sl, CPSW_SL_RX_PRI_MAP,
734 RX_PRIORITY_MAPPING);
735
736 switch (cpsw->version) {
737 case CPSW_VERSION_1:
738 slave_write(slave, TX_PRIORITY_MAPPING, CPSW1_TX_PRI_MAP);
739 /* Increase RX FIFO size to 5 for supporting fullduplex
740 * flow control mode
741 */
742 slave_write(slave,
743 (CPSW_MAX_BLKS_TX << CPSW_MAX_BLKS_TX_SHIFT) |
744 CPSW_MAX_BLKS_RX, CPSW1_MAX_BLKS);
745 break;
746 case CPSW_VERSION_2:
747 case CPSW_VERSION_3:
748 case CPSW_VERSION_4:
749 slave_write(slave, TX_PRIORITY_MAPPING, CPSW2_TX_PRI_MAP);
750 /* Increase RX FIFO size to 5 for supporting fullduplex
751 * flow control mode
752 */
753 slave_write(slave,
754 (CPSW_MAX_BLKS_TX << CPSW_MAX_BLKS_TX_SHIFT) |
755 CPSW_MAX_BLKS_RX, CPSW2_MAX_BLKS);
756 break;
757 }
758
759 /* setup max packet size, and mac address */
760 cpsw_sl_reg_write(slave->mac_sl, CPSW_SL_RX_MAXLEN,
761 cpsw->rx_packet_max);
762 cpsw_set_slave_mac(slave, priv);
763
764 slave->mac_control = 0; /* no link yet */
765
766 if (cpsw_is_switch_en(cpsw))
767 cpsw_port_add_switch_def_ale_entries(priv, slave);
768 else
769 cpsw_port_add_dual_emac_def_ale_entries(priv, slave);
770
771 if (!slave->data->phy_node)
772 dev_err(priv->dev, "no phy found on slave %d\n",
773 slave->slave_num);
774 phy = of_phy_connect(priv->ndev, slave->data->phy_node,
775 &cpsw_adjust_link, 0, slave->data->phy_if);
776 if (!phy) {
777 dev_err(priv->dev, "phy \"%pOF\" not found on slave %d\n",
778 slave->data->phy_node,
779 slave->slave_num);
780 return;
781 }
782 slave->phy = phy;
783
784 phy_attached_info(slave->phy);
785
786 phy_start(slave->phy);
787
788 /* Configure GMII_SEL register */
789 phy_set_mode_ext(slave->data->ifphy, PHY_MODE_ETHERNET,
790 slave->data->phy_if);
791 }
792
793 static int cpsw_ndo_stop(struct net_device *ndev)
794 {
795 struct cpsw_priv *priv = netdev_priv(ndev);
796 struct cpsw_common *cpsw = priv->cpsw;
797 struct cpsw_slave *slave;
798
799 cpsw_info(priv, ifdown, "shutting down ndev\n");
800 slave = &cpsw->slaves[priv->emac_port - 1];
801 if (slave->phy)
802 phy_stop(slave->phy);
803
804 netif_tx_stop_all_queues(priv->ndev);
805
806 if (slave->phy) {
807 phy_disconnect(slave->phy);
808 slave->phy = NULL;
809 }
810
811 __hw_addr_ref_unsync_dev(&ndev->mc, ndev, cpsw_purge_all_mc);
812
813 if (cpsw->usage_count <= 1) {
814 napi_disable(&cpsw->napi_rx);
815 napi_disable(&cpsw->napi_tx);
816 cpts_unregister(cpsw->cpts);
817 cpsw_intr_disable(cpsw);
818 cpdma_ctlr_stop(cpsw->dma);
819 cpsw_ale_stop(cpsw->ale);
820 cpsw_destroy_xdp_rxqs(cpsw);
821 }
822
823 if (cpsw_need_resplit(cpsw))
824 cpsw_split_res(cpsw);
825
826 cpsw->usage_count--;
827 pm_runtime_put_sync(cpsw->dev);
828 return 0;
829 }
830
831 static int cpsw_ndo_open(struct net_device *ndev)
832 {
833 struct cpsw_priv *priv = netdev_priv(ndev);
834 struct cpsw_common *cpsw = priv->cpsw;
835 int ret;
836
837 dev_info(priv->dev, "starting ndev. mode: %s\n",
838 cpsw_is_switch_en(cpsw) ? "switch" : "dual_mac");
839 ret = pm_runtime_get_sync(cpsw->dev);
840 if (ret < 0) {
841 pm_runtime_put_noidle(cpsw->dev);
842 return ret;
843 }
844
845 /* Notify the stack of the actual queue counts. */
846 ret = netif_set_real_num_tx_queues(ndev, cpsw->tx_ch_num);
847 if (ret) {
848 dev_err(priv->dev, "cannot set real number of tx queues\n");
849 goto pm_cleanup;
850 }
851
852 ret = netif_set_real_num_rx_queues(ndev, cpsw->rx_ch_num);
853 if (ret) {
854 dev_err(priv->dev, "cannot set real number of rx queues\n");
855 goto pm_cleanup;
856 }
857
858 /* Initialize host and slave ports */
859 if (!cpsw->usage_count)
860 cpsw_init_host_port(priv);
861 cpsw_slave_open(&cpsw->slaves[priv->emac_port - 1], priv);
862
863 /* initialize shared resources for every ndev */
864 if (!cpsw->usage_count) {
865 /* create rxqs for both infs in dual mac as they use same pool
866 * and must be destroyed together when no users.
867 */
868 ret = cpsw_create_xdp_rxqs(cpsw);
869 if (ret < 0)
870 goto err_cleanup;
871
872 ret = cpsw_fill_rx_channels(priv);
873 if (ret < 0)
874 goto err_cleanup;
875
876 if (cpsw->cpts) {
877 if (cpts_register(cpsw->cpts))
878 dev_err(priv->dev, "error registering cpts device\n");
879 else
880 writel(0x10, &cpsw->wr_regs->misc_en);
881 }
882
883 napi_enable(&cpsw->napi_rx);
884 napi_enable(&cpsw->napi_tx);
885
886 if (cpsw->tx_irq_disabled) {
887 cpsw->tx_irq_disabled = false;
888 enable_irq(cpsw->irqs_table[1]);
889 }
890
891 if (cpsw->rx_irq_disabled) {
892 cpsw->rx_irq_disabled = false;
893 enable_irq(cpsw->irqs_table[0]);
894 }
895 }
896
897 cpsw_restore(priv);
898
899 /* Enable Interrupt pacing if configured */
900 if (cpsw->coal_intvl != 0) {
901 struct ethtool_coalesce coal;
902
903 coal.rx_coalesce_usecs = cpsw->coal_intvl;
904 cpsw_set_coalesce(ndev, &coal);
905 }
906
907 cpdma_ctlr_start(cpsw->dma);
908 cpsw_intr_enable(cpsw);
909 cpsw->usage_count++;
910
911 return 0;
912
913 err_cleanup:
914 cpsw_ndo_stop(ndev);
915
916 pm_cleanup:
917 pm_runtime_put_sync(cpsw->dev);
918 return ret;
919 }
920
921 static netdev_tx_t cpsw_ndo_start_xmit(struct sk_buff *skb,
922 struct net_device *ndev)
923 {
924 struct cpsw_priv *priv = netdev_priv(ndev);
925 struct cpsw_common *cpsw = priv->cpsw;
926 struct cpts *cpts = cpsw->cpts;
927 struct netdev_queue *txq;
928 struct cpdma_chan *txch;
929 int ret, q_idx;
930
931 if (skb_padto(skb, CPSW_MIN_PACKET_SIZE)) {
932 cpsw_err(priv, tx_err, "packet pad failed\n");
933 ndev->stats.tx_dropped++;
934 return NET_XMIT_DROP;
935 }
936
937 if (skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP &&
938 priv->tx_ts_enabled && cpts_can_timestamp(cpts, skb))
939 skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS;
940
941 q_idx = skb_get_queue_mapping(skb);
942 if (q_idx >= cpsw->tx_ch_num)
943 q_idx = q_idx % cpsw->tx_ch_num;
944
945 txch = cpsw->txv[q_idx].ch;
946 txq = netdev_get_tx_queue(ndev, q_idx);
947 skb_tx_timestamp(skb);
948 ret = cpdma_chan_submit(txch, skb, skb->data, skb->len,
949 priv->emac_port);
950 if (unlikely(ret != 0)) {
951 cpsw_err(priv, tx_err, "desc submit failed\n");
952 goto fail;
953 }
954
955 /* If there is no more tx desc left free then we need to
956 * tell the kernel to stop sending us tx frames.
957 */
958 if (unlikely(!cpdma_check_free_tx_desc(txch))) {
959 netif_tx_stop_queue(txq);
960
961 /* Barrier, so that stop_queue visible to other cpus */
962 smp_mb__after_atomic();
963
964 if (cpdma_check_free_tx_desc(txch))
965 netif_tx_wake_queue(txq);
966 }
967
968 return NETDEV_TX_OK;
969 fail:
970 ndev->stats.tx_dropped++;
971 netif_tx_stop_queue(txq);
972
973 /* Barrier, so that stop_queue visible to other cpus */
974 smp_mb__after_atomic();
975
976 if (cpdma_check_free_tx_desc(txch))
977 netif_tx_wake_queue(txq);
978
979 return NETDEV_TX_BUSY;
980 }
981
982 static int cpsw_ndo_set_mac_address(struct net_device *ndev, void *p)
983 {
984 struct sockaddr *addr = (struct sockaddr *)p;
985 struct cpsw_priv *priv = netdev_priv(ndev);
986 struct cpsw_common *cpsw = priv->cpsw;
987 int ret, slave_no;
988 int flags = 0;
989 u16 vid = 0;
990
991 slave_no = cpsw_slave_index(cpsw, priv);
992 if (!is_valid_ether_addr(addr->sa_data))
993 return -EADDRNOTAVAIL;
994
995 ret = pm_runtime_get_sync(cpsw->dev);
996 if (ret < 0) {
997 pm_runtime_put_noidle(cpsw->dev);
998 return ret;
999 }
1000
1001 vid = cpsw->slaves[slave_no].port_vlan;
1002 flags = ALE_VLAN | ALE_SECURE;
1003
1004 cpsw_ale_del_ucast(cpsw->ale, priv->mac_addr, HOST_PORT_NUM,
1005 flags, vid);
1006 cpsw_ale_add_ucast(cpsw->ale, addr->sa_data, HOST_PORT_NUM,
1007 flags, vid);
1008
1009 ether_addr_copy(priv->mac_addr, addr->sa_data);
1010 ether_addr_copy(ndev->dev_addr, priv->mac_addr);
1011 cpsw_set_slave_mac(&cpsw->slaves[slave_no], priv);
1012
1013 pm_runtime_put(cpsw->dev);
1014
1015 return 0;
1016 }
1017
1018 static int cpsw_ndo_vlan_rx_kill_vid(struct net_device *ndev,
1019 __be16 proto, u16 vid)
1020 {
1021 struct cpsw_priv *priv = netdev_priv(ndev);
1022 struct cpsw_common *cpsw = priv->cpsw;
1023 int ret;
1024 int i;
1025
1026 if (cpsw_is_switch_en(cpsw)) {
1027 dev_dbg(cpsw->dev, "ndo del vlan is called in switch mode\n");
1028 return 0;
1029 }
1030
1031 if (vid == cpsw->data.default_vlan)
1032 return 0;
1033
1034 ret = pm_runtime_get_sync(cpsw->dev);
1035 if (ret < 0) {
1036 pm_runtime_put_noidle(cpsw->dev);
1037 return ret;
1038 }
1039
1040 /* reset the return code as pm_runtime_get_sync() can return
1041 * non zero values as well.
1042 */
1043 ret = 0;
1044 for (i = 0; i < cpsw->data.slaves; i++) {
1045 if (cpsw->slaves[i].ndev &&
1046 vid == cpsw->slaves[i].port_vlan) {
1047 ret = -EINVAL;
1048 goto err;
1049 }
1050 }
1051
1052 dev_dbg(priv->dev, "removing vlanid %d from vlan filter\n", vid);
1053 ret = cpsw_ale_del_vlan(cpsw->ale, vid, 0);
1054 if (ret)
1055 dev_err(priv->dev, "cpsw_ale_del_vlan() failed: ret %d\n", ret);
1056 ret = cpsw_ale_del_ucast(cpsw->ale, priv->mac_addr,
1057 HOST_PORT_NUM, ALE_VLAN, vid);
1058 if (ret)
1059 dev_err(priv->dev, "cpsw_ale_del_ucast() failed: ret %d\n",
1060 ret);
1061 ret = cpsw_ale_del_mcast(cpsw->ale, priv->ndev->broadcast,
1062 0, ALE_VLAN, vid);
1063 if (ret)
1064 dev_err(priv->dev, "cpsw_ale_del_mcast failed. ret %d\n",
1065 ret);
1066 cpsw_ale_flush_multicast(cpsw->ale, ALE_PORT_HOST, vid);
1067 ret = 0;
1068 err:
1069 pm_runtime_put(cpsw->dev);
1070 return ret;
1071 }
1072
1073 static int cpsw_ndo_get_phys_port_name(struct net_device *ndev, char *name,
1074 size_t len)
1075 {
1076 struct cpsw_priv *priv = netdev_priv(ndev);
1077 int err;
1078
1079 err = snprintf(name, len, "p%d", priv->emac_port);
1080
1081 if (err >= len)
1082 return -EINVAL;
1083
1084 return 0;
1085 }
1086
1087 #ifdef CONFIG_NET_POLL_CONTROLLER
1088 static void cpsw_ndo_poll_controller(struct net_device *ndev)
1089 {
1090 struct cpsw_common *cpsw = ndev_to_cpsw(ndev);
1091
1092 cpsw_intr_disable(cpsw);
1093 cpsw_rx_interrupt(cpsw->irqs_table[0], cpsw);
1094 cpsw_tx_interrupt(cpsw->irqs_table[1], cpsw);
1095 cpsw_intr_enable(cpsw);
1096 }
1097 #endif
1098
1099 static int cpsw_ndo_xdp_xmit(struct net_device *ndev, int n,
1100 struct xdp_frame **frames, u32 flags)
1101 {
1102 struct cpsw_priv *priv = netdev_priv(ndev);
1103 struct xdp_frame *xdpf;
1104 int i, drops = 0;
1105
1106 if (unlikely(flags & ~XDP_XMIT_FLAGS_MASK))
1107 return -EINVAL;
1108
1109 for (i = 0; i < n; i++) {
1110 xdpf = frames[i];
1111 if (xdpf->len < CPSW_MIN_PACKET_SIZE) {
1112 xdp_return_frame_rx_napi(xdpf);
1113 drops++;
1114 continue;
1115 }
1116
1117 if (cpsw_xdp_tx_frame(priv, xdpf, NULL, priv->emac_port))
1118 drops++;
1119 }
1120
1121 return n - drops;
1122 }
1123
1124 static int cpsw_get_port_parent_id(struct net_device *ndev,
1125 struct netdev_phys_item_id *ppid)
1126 {
1127 struct cpsw_common *cpsw = ndev_to_cpsw(ndev);
1128
1129 ppid->id_len = sizeof(cpsw->base_mac);
1130 memcpy(&ppid->id, &cpsw->base_mac, ppid->id_len);
1131
1132 return 0;
1133 }
1134
1135 static const struct net_device_ops cpsw_netdev_ops = {
1136 .ndo_open = cpsw_ndo_open,
1137 .ndo_stop = cpsw_ndo_stop,
1138 .ndo_start_xmit = cpsw_ndo_start_xmit,
1139 .ndo_set_mac_address = cpsw_ndo_set_mac_address,
1140 .ndo_do_ioctl = cpsw_ndo_ioctl,
1141 .ndo_validate_addr = eth_validate_addr,
1142 .ndo_tx_timeout = cpsw_ndo_tx_timeout,
1143 .ndo_set_rx_mode = cpsw_ndo_set_rx_mode,
1144 .ndo_set_tx_maxrate = cpsw_ndo_set_tx_maxrate,
1145 #ifdef CONFIG_NET_POLL_CONTROLLER
1146 .ndo_poll_controller = cpsw_ndo_poll_controller,
1147 #endif
1148 .ndo_vlan_rx_add_vid = cpsw_ndo_vlan_rx_add_vid,
1149 .ndo_vlan_rx_kill_vid = cpsw_ndo_vlan_rx_kill_vid,
1150 .ndo_setup_tc = cpsw_ndo_setup_tc,
1151 .ndo_get_phys_port_name = cpsw_ndo_get_phys_port_name,
1152 .ndo_bpf = cpsw_ndo_bpf,
1153 .ndo_xdp_xmit = cpsw_ndo_xdp_xmit,
1154 .ndo_get_port_parent_id = cpsw_get_port_parent_id,
1155 };
1156
1157 static void cpsw_get_drvinfo(struct net_device *ndev,
1158 struct ethtool_drvinfo *info)
1159 {
1160 struct cpsw_common *cpsw = ndev_to_cpsw(ndev);
1161 struct platform_device *pdev;
1162
1163 pdev = to_platform_device(cpsw->dev);
1164 strlcpy(info->driver, "cpsw-switch", sizeof(info->driver));
1165 strlcpy(info->version, "2.0", sizeof(info->version));
1166 strlcpy(info->bus_info, pdev->name, sizeof(info->bus_info));
1167 }
1168
1169 static int cpsw_set_pauseparam(struct net_device *ndev,
1170 struct ethtool_pauseparam *pause)
1171 {
1172 struct cpsw_common *cpsw = ndev_to_cpsw(ndev);
1173 struct cpsw_priv *priv = netdev_priv(ndev);
1174 int slave_no;
1175
1176 slave_no = cpsw_slave_index(cpsw, priv);
1177 if (!cpsw->slaves[slave_no].phy)
1178 return -EINVAL;
1179
1180 if (!phy_validate_pause(cpsw->slaves[slave_no].phy, pause))
1181 return -EINVAL;
1182
1183 priv->rx_pause = pause->rx_pause ? true : false;
1184 priv->tx_pause = pause->tx_pause ? true : false;
1185
1186 phy_set_asym_pause(cpsw->slaves[slave_no].phy,
1187 priv->rx_pause, priv->tx_pause);
1188
1189 return 0;
1190 }
1191
1192 static int cpsw_set_channels(struct net_device *ndev,
1193 struct ethtool_channels *chs)
1194 {
1195 return cpsw_set_channels_common(ndev, chs, cpsw_rx_handler);
1196 }
1197
1198 static const struct ethtool_ops cpsw_ethtool_ops = {
1199 .supported_coalesce_params = ETHTOOL_COALESCE_RX_USECS,
1200 .get_drvinfo = cpsw_get_drvinfo,
1201 .get_msglevel = cpsw_get_msglevel,
1202 .set_msglevel = cpsw_set_msglevel,
1203 .get_link = ethtool_op_get_link,
1204 .get_ts_info = cpsw_get_ts_info,
1205 .get_coalesce = cpsw_get_coalesce,
1206 .set_coalesce = cpsw_set_coalesce,
1207 .get_sset_count = cpsw_get_sset_count,
1208 .get_strings = cpsw_get_strings,
1209 .get_ethtool_stats = cpsw_get_ethtool_stats,
1210 .get_pauseparam = cpsw_get_pauseparam,
1211 .set_pauseparam = cpsw_set_pauseparam,
1212 .get_wol = cpsw_get_wol,
1213 .set_wol = cpsw_set_wol,
1214 .get_regs_len = cpsw_get_regs_len,
1215 .get_regs = cpsw_get_regs,
1216 .begin = cpsw_ethtool_op_begin,
1217 .complete = cpsw_ethtool_op_complete,
1218 .get_channels = cpsw_get_channels,
1219 .set_channels = cpsw_set_channels,
1220 .get_link_ksettings = cpsw_get_link_ksettings,
1221 .set_link_ksettings = cpsw_set_link_ksettings,
1222 .get_eee = cpsw_get_eee,
1223 .set_eee = cpsw_set_eee,
1224 .nway_reset = cpsw_nway_reset,
1225 .get_ringparam = cpsw_get_ringparam,
1226 .set_ringparam = cpsw_set_ringparam,
1227 };
1228
1229 static int cpsw_probe_dt(struct cpsw_common *cpsw)
1230 {
1231 struct device_node *node = cpsw->dev->of_node, *tmp_node, *port_np;
1232 struct cpsw_platform_data *data = &cpsw->data;
1233 struct device *dev = cpsw->dev;
1234 int ret;
1235 u32 prop;
1236
1237 if (!node)
1238 return -EINVAL;
1239
1240 tmp_node = of_get_child_by_name(node, "ethernet-ports");
1241 if (!tmp_node)
1242 return -ENOENT;
1243 data->slaves = of_get_child_count(tmp_node);
1244 if (data->slaves != CPSW_SLAVE_PORTS_NUM) {
1245 of_node_put(tmp_node);
1246 return -ENOENT;
1247 }
1248
1249 data->active_slave = 0;
1250 data->channels = CPSW_MAX_QUEUES;
1251 data->dual_emac = true;
1252 data->bd_ram_size = CPSW_BD_RAM_SIZE;
1253 data->mac_control = 0;
1254
1255 data->slave_data = devm_kcalloc(dev, CPSW_SLAVE_PORTS_NUM,
1256 sizeof(struct cpsw_slave_data),
1257 GFP_KERNEL);
1258 if (!data->slave_data)
1259 return -ENOMEM;
1260
1261 /* Populate all the child nodes here...
1262 */
1263 ret = devm_of_platform_populate(dev);
1264 /* We do not want to force this, as in some cases may not have child */
1265 if (ret)
1266 dev_warn(dev, "Doesn't have any child node\n");
1267
1268 for_each_child_of_node(tmp_node, port_np) {
1269 struct cpsw_slave_data *slave_data;
1270 const void *mac_addr;
1271 u32 port_id;
1272
1273 ret = of_property_read_u32(port_np, "reg", &port_id);
1274 if (ret < 0) {
1275 dev_err(dev, "%pOF error reading port_id %d\n",
1276 port_np, ret);
1277 goto err_node_put;
1278 }
1279
1280 if (!port_id || port_id > CPSW_SLAVE_PORTS_NUM) {
1281 dev_err(dev, "%pOF has invalid port_id %u\n",
1282 port_np, port_id);
1283 ret = -EINVAL;
1284 goto err_node_put;
1285 }
1286
1287 slave_data = &data->slave_data[port_id - 1];
1288
1289 slave_data->disabled = !of_device_is_available(port_np);
1290 if (slave_data->disabled)
1291 continue;
1292
1293 slave_data->slave_node = port_np;
1294 slave_data->ifphy = devm_of_phy_get(dev, port_np, NULL);
1295 if (IS_ERR(slave_data->ifphy)) {
1296 ret = PTR_ERR(slave_data->ifphy);
1297 dev_err(dev, "%pOF: Error retrieving port phy: %d\n",
1298 port_np, ret);
1299 goto err_node_put;
1300 }
1301
1302 if (of_phy_is_fixed_link(port_np)) {
1303 ret = of_phy_register_fixed_link(port_np);
1304 if (ret) {
1305 if (ret != -EPROBE_DEFER)
1306 dev_err(dev, "%pOF failed to register fixed-link phy: %d\n",
1307 port_np, ret);
1308 goto err_node_put;
1309 }
1310 slave_data->phy_node = of_node_get(port_np);
1311 } else {
1312 slave_data->phy_node =
1313 of_parse_phandle(port_np, "phy-handle", 0);
1314 }
1315
1316 if (!slave_data->phy_node) {
1317 dev_err(dev, "%pOF no phy found\n", port_np);
1318 ret = -ENODEV;
1319 goto err_node_put;
1320 }
1321
1322 ret = of_get_phy_mode(port_np, &slave_data->phy_if);
1323 if (ret) {
1324 dev_err(dev, "%pOF read phy-mode err %d\n",
1325 port_np, ret);
1326 goto err_node_put;
1327 }
1328
1329 mac_addr = of_get_mac_address(port_np);
1330 if (!IS_ERR(mac_addr)) {
1331 ether_addr_copy(slave_data->mac_addr, mac_addr);
1332 } else {
1333 ret = ti_cm_get_macid(dev, port_id - 1,
1334 slave_data->mac_addr);
1335 if (ret)
1336 goto err_node_put;
1337 }
1338
1339 if (of_property_read_u32(port_np, "ti,dual-emac-pvid",
1340 &prop)) {
1341 dev_err(dev, "%pOF Missing dual_emac_res_vlan in DT.\n",
1342 port_np);
1343 slave_data->dual_emac_res_vlan = port_id;
1344 dev_err(dev, "%pOF Using %d as Reserved VLAN\n",
1345 port_np, slave_data->dual_emac_res_vlan);
1346 } else {
1347 slave_data->dual_emac_res_vlan = prop;
1348 }
1349 }
1350
1351 of_node_put(tmp_node);
1352 return 0;
1353
1354 err_node_put:
1355 of_node_put(port_np);
1356 return ret;
1357 }
1358
1359 static void cpsw_remove_dt(struct cpsw_common *cpsw)
1360 {
1361 struct cpsw_platform_data *data = &cpsw->data;
1362 int i = 0;
1363
1364 for (i = 0; i < cpsw->data.slaves; i++) {
1365 struct cpsw_slave_data *slave_data = &data->slave_data[i];
1366 struct device_node *port_np = slave_data->phy_node;
1367
1368 if (port_np) {
1369 if (of_phy_is_fixed_link(port_np))
1370 of_phy_deregister_fixed_link(port_np);
1371
1372 of_node_put(port_np);
1373 }
1374 }
1375 }
1376
1377 static int cpsw_create_ports(struct cpsw_common *cpsw)
1378 {
1379 struct cpsw_platform_data *data = &cpsw->data;
1380 struct net_device *ndev, *napi_ndev = NULL;
1381 struct device *dev = cpsw->dev;
1382 struct cpsw_priv *priv;
1383 int ret = 0, i = 0;
1384
1385 for (i = 0; i < cpsw->data.slaves; i++) {
1386 struct cpsw_slave_data *slave_data = &data->slave_data[i];
1387
1388 if (slave_data->disabled)
1389 continue;
1390
1391 ndev = devm_alloc_etherdev_mqs(dev, sizeof(struct cpsw_priv),
1392 CPSW_MAX_QUEUES,
1393 CPSW_MAX_QUEUES);
1394 if (!ndev) {
1395 dev_err(dev, "error allocating net_device\n");
1396 return -ENOMEM;
1397 }
1398
1399 priv = netdev_priv(ndev);
1400 priv->cpsw = cpsw;
1401 priv->ndev = ndev;
1402 priv->dev = dev;
1403 priv->msg_enable = netif_msg_init(debug_level, CPSW_DEBUG);
1404 priv->emac_port = i + 1;
1405
1406 if (is_valid_ether_addr(slave_data->mac_addr)) {
1407 ether_addr_copy(priv->mac_addr, slave_data->mac_addr);
1408 dev_info(cpsw->dev, "Detected MACID = %pM\n",
1409 priv->mac_addr);
1410 } else {
1411 eth_random_addr(slave_data->mac_addr);
1412 dev_info(cpsw->dev, "Random MACID = %pM\n",
1413 priv->mac_addr);
1414 }
1415 ether_addr_copy(ndev->dev_addr, slave_data->mac_addr);
1416 ether_addr_copy(priv->mac_addr, slave_data->mac_addr);
1417
1418 cpsw->slaves[i].ndev = ndev;
1419
1420 ndev->features |= NETIF_F_HW_VLAN_CTAG_FILTER |
1421 NETIF_F_HW_VLAN_CTAG_RX | NETIF_F_NETNS_LOCAL;
1422
1423 ndev->netdev_ops = &cpsw_netdev_ops;
1424 ndev->ethtool_ops = &cpsw_ethtool_ops;
1425 SET_NETDEV_DEV(ndev, dev);
1426
1427 if (!napi_ndev) {
1428 /* CPSW Host port CPDMA interface is shared between
1429 * ports and there is only one TX and one RX IRQs
1430 * available for all possible TX and RX channels
1431 * accordingly.
1432 */
1433 netif_napi_add(ndev, &cpsw->napi_rx,
1434 cpsw->quirk_irq ?
1435 cpsw_rx_poll : cpsw_rx_mq_poll,
1436 CPSW_POLL_WEIGHT);
1437 netif_tx_napi_add(ndev, &cpsw->napi_tx,
1438 cpsw->quirk_irq ?
1439 cpsw_tx_poll : cpsw_tx_mq_poll,
1440 CPSW_POLL_WEIGHT);
1441 }
1442
1443 napi_ndev = ndev;
1444 }
1445
1446 return ret;
1447 }
1448
1449 static void cpsw_unregister_ports(struct cpsw_common *cpsw)
1450 {
1451 int i = 0;
1452
1453 for (i = 0; i < cpsw->data.slaves; i++) {
1454 if (!cpsw->slaves[i].ndev)
1455 continue;
1456
1457 unregister_netdev(cpsw->slaves[i].ndev);
1458 }
1459 }
1460
1461 static int cpsw_register_ports(struct cpsw_common *cpsw)
1462 {
1463 int ret = 0, i = 0;
1464
1465 for (i = 0; i < cpsw->data.slaves; i++) {
1466 if (!cpsw->slaves[i].ndev)
1467 continue;
1468
1469 /* register the network device */
1470 ret = register_netdev(cpsw->slaves[i].ndev);
1471 if (ret) {
1472 dev_err(cpsw->dev,
1473 "cpsw: err registering net device%d\n", i);
1474 cpsw->slaves[i].ndev = NULL;
1475 break;
1476 }
1477 }
1478
1479 if (ret)
1480 cpsw_unregister_ports(cpsw);
1481 return ret;
1482 }
1483
1484 bool cpsw_port_dev_check(const struct net_device *ndev)
1485 {
1486 if (ndev->netdev_ops == &cpsw_netdev_ops) {
1487 struct cpsw_common *cpsw = ndev_to_cpsw(ndev);
1488
1489 return !cpsw->data.dual_emac;
1490 }
1491
1492 return false;
1493 }
1494
1495 static void cpsw_port_offload_fwd_mark_update(struct cpsw_common *cpsw)
1496 {
1497 int set_val = 0;
1498 int i;
1499
1500 if (!cpsw->ale_bypass &&
1501 (cpsw->br_members == (ALE_PORT_1 | ALE_PORT_2)))
1502 set_val = 1;
1503
1504 dev_dbg(cpsw->dev, "set offload_fwd_mark %d\n", set_val);
1505
1506 for (i = 0; i < cpsw->data.slaves; i++) {
1507 struct net_device *sl_ndev = cpsw->slaves[i].ndev;
1508 struct cpsw_priv *priv = netdev_priv(sl_ndev);
1509
1510 priv->offload_fwd_mark = set_val;
1511 }
1512 }
1513
1514 static int cpsw_netdevice_port_link(struct net_device *ndev,
1515 struct net_device *br_ndev)
1516 {
1517 struct cpsw_priv *priv = netdev_priv(ndev);
1518 struct cpsw_common *cpsw = priv->cpsw;
1519
1520 if (!cpsw->br_members) {
1521 cpsw->hw_bridge_dev = br_ndev;
1522 } else {
1523 /* This is adding the port to a second bridge, this is
1524 * unsupported
1525 */
1526 if (cpsw->hw_bridge_dev != br_ndev)
1527 return -EOPNOTSUPP;
1528 }
1529
1530 cpsw->br_members |= BIT(priv->emac_port);
1531
1532 cpsw_port_offload_fwd_mark_update(cpsw);
1533
1534 return NOTIFY_DONE;
1535 }
1536
1537 static void cpsw_netdevice_port_unlink(struct net_device *ndev)
1538 {
1539 struct cpsw_priv *priv = netdev_priv(ndev);
1540 struct cpsw_common *cpsw = priv->cpsw;
1541
1542 cpsw->br_members &= ~BIT(priv->emac_port);
1543
1544 cpsw_port_offload_fwd_mark_update(cpsw);
1545
1546 if (!cpsw->br_members)
1547 cpsw->hw_bridge_dev = NULL;
1548 }
1549
1550 /* netdev notifier */
1551 static int cpsw_netdevice_event(struct notifier_block *unused,
1552 unsigned long event, void *ptr)
1553 {
1554 struct net_device *ndev = netdev_notifier_info_to_dev(ptr);
1555 struct netdev_notifier_changeupper_info *info;
1556 int ret = NOTIFY_DONE;
1557
1558 if (!cpsw_port_dev_check(ndev))
1559 return NOTIFY_DONE;
1560
1561 switch (event) {
1562 case NETDEV_CHANGEUPPER:
1563 info = ptr;
1564
1565 if (netif_is_bridge_master(info->upper_dev)) {
1566 if (info->linking)
1567 ret = cpsw_netdevice_port_link(ndev,
1568 info->upper_dev);
1569 else
1570 cpsw_netdevice_port_unlink(ndev);
1571 }
1572 break;
1573 default:
1574 return NOTIFY_DONE;
1575 }
1576
1577 return notifier_from_errno(ret);
1578 }
1579
1580 static struct notifier_block cpsw_netdevice_nb __read_mostly = {
1581 .notifier_call = cpsw_netdevice_event,
1582 };
1583
1584 static int cpsw_register_notifiers(struct cpsw_common *cpsw)
1585 {
1586 int ret = 0;
1587
1588 ret = register_netdevice_notifier(&cpsw_netdevice_nb);
1589 if (ret) {
1590 dev_err(cpsw->dev, "can't register netdevice notifier\n");
1591 return ret;
1592 }
1593
1594 ret = cpsw_switchdev_register_notifiers(cpsw);
1595 if (ret)
1596 unregister_netdevice_notifier(&cpsw_netdevice_nb);
1597
1598 return ret;
1599 }
1600
1601 static void cpsw_unregister_notifiers(struct cpsw_common *cpsw)
1602 {
1603 cpsw_switchdev_unregister_notifiers(cpsw);
1604 unregister_netdevice_notifier(&cpsw_netdevice_nb);
1605 }
1606
1607 static const struct devlink_ops cpsw_devlink_ops = {
1608 };
1609
1610 static int cpsw_dl_switch_mode_get(struct devlink *dl, u32 id,
1611 struct devlink_param_gset_ctx *ctx)
1612 {
1613 struct cpsw_devlink *dl_priv = devlink_priv(dl);
1614 struct cpsw_common *cpsw = dl_priv->cpsw;
1615
1616 dev_dbg(cpsw->dev, "%s id:%u\n", __func__, id);
1617
1618 if (id != CPSW_DL_PARAM_SWITCH_MODE)
1619 return -EOPNOTSUPP;
1620
1621 ctx->val.vbool = !cpsw->data.dual_emac;
1622
1623 return 0;
1624 }
1625
1626 static int cpsw_dl_switch_mode_set(struct devlink *dl, u32 id,
1627 struct devlink_param_gset_ctx *ctx)
1628 {
1629 struct cpsw_devlink *dl_priv = devlink_priv(dl);
1630 struct cpsw_common *cpsw = dl_priv->cpsw;
1631 int vlan = cpsw->data.default_vlan;
1632 bool switch_en = ctx->val.vbool;
1633 bool if_running = false;
1634 int i;
1635
1636 dev_dbg(cpsw->dev, "%s id:%u\n", __func__, id);
1637
1638 if (id != CPSW_DL_PARAM_SWITCH_MODE)
1639 return -EOPNOTSUPP;
1640
1641 if (switch_en == !cpsw->data.dual_emac)
1642 return 0;
1643
1644 if (!switch_en && cpsw->br_members) {
1645 dev_err(cpsw->dev, "Remove ports from BR before disabling switch mode\n");
1646 return -EINVAL;
1647 }
1648
1649 rtnl_lock();
1650
1651 for (i = 0; i < cpsw->data.slaves; i++) {
1652 struct cpsw_slave *slave = &cpsw->slaves[i];
1653 struct net_device *sl_ndev = slave->ndev;
1654
1655 if (!sl_ndev || !netif_running(sl_ndev))
1656 continue;
1657
1658 if_running = true;
1659 }
1660
1661 if (!if_running) {
1662 /* all ndevs are down */
1663 cpsw->data.dual_emac = !switch_en;
1664 for (i = 0; i < cpsw->data.slaves; i++) {
1665 struct cpsw_slave *slave = &cpsw->slaves[i];
1666 struct net_device *sl_ndev = slave->ndev;
1667
1668 if (!sl_ndev)
1669 continue;
1670
1671 if (switch_en)
1672 vlan = cpsw->data.default_vlan;
1673 else
1674 vlan = slave->data->dual_emac_res_vlan;
1675 slave->port_vlan = vlan;
1676 }
1677 goto exit;
1678 }
1679
1680 if (switch_en) {
1681 dev_info(cpsw->dev, "Enable switch mode\n");
1682
1683 /* enable bypass - no forwarding; all traffic goes to Host */
1684 cpsw_ale_control_set(cpsw->ale, 0, ALE_BYPASS, 1);
1685
1686 /* clean up ALE table */
1687 cpsw_ale_control_set(cpsw->ale, 0, ALE_CLEAR, 1);
1688 cpsw_ale_control_get(cpsw->ale, 0, ALE_AGEOUT);
1689
1690 cpsw_init_host_port_switch(cpsw);
1691
1692 for (i = 0; i < cpsw->data.slaves; i++) {
1693 struct cpsw_slave *slave = &cpsw->slaves[i];
1694 struct net_device *sl_ndev = slave->ndev;
1695 struct cpsw_priv *priv;
1696
1697 if (!sl_ndev)
1698 continue;
1699
1700 priv = netdev_priv(sl_ndev);
1701 slave->port_vlan = vlan;
1702 if (netif_running(sl_ndev))
1703 cpsw_port_add_switch_def_ale_entries(priv,
1704 slave);
1705 }
1706
1707 cpsw_ale_control_set(cpsw->ale, 0, ALE_BYPASS, 0);
1708 cpsw->data.dual_emac = false;
1709 } else {
1710 dev_info(cpsw->dev, "Disable switch mode\n");
1711
1712 /* enable bypass - no forwarding; all traffic goes to Host */
1713 cpsw_ale_control_set(cpsw->ale, 0, ALE_BYPASS, 1);
1714
1715 cpsw_ale_control_set(cpsw->ale, 0, ALE_CLEAR, 1);
1716 cpsw_ale_control_get(cpsw->ale, 0, ALE_AGEOUT);
1717
1718 cpsw_init_host_port_dual_mac(cpsw);
1719
1720 for (i = 0; i < cpsw->data.slaves; i++) {
1721 struct cpsw_slave *slave = &cpsw->slaves[i];
1722 struct net_device *sl_ndev = slave->ndev;
1723 struct cpsw_priv *priv;
1724
1725 if (!sl_ndev)
1726 continue;
1727
1728 priv = netdev_priv(slave->ndev);
1729 slave->port_vlan = slave->data->dual_emac_res_vlan;
1730 cpsw_port_add_dual_emac_def_ale_entries(priv, slave);
1731 }
1732
1733 cpsw_ale_control_set(cpsw->ale, 0, ALE_BYPASS, 0);
1734 cpsw->data.dual_emac = true;
1735 }
1736 exit:
1737 rtnl_unlock();
1738
1739 return 0;
1740 }
1741
1742 static int cpsw_dl_ale_ctrl_get(struct devlink *dl, u32 id,
1743 struct devlink_param_gset_ctx *ctx)
1744 {
1745 struct cpsw_devlink *dl_priv = devlink_priv(dl);
1746 struct cpsw_common *cpsw = dl_priv->cpsw;
1747
1748 dev_dbg(cpsw->dev, "%s id:%u\n", __func__, id);
1749
1750 switch (id) {
1751 case CPSW_DL_PARAM_ALE_BYPASS:
1752 ctx->val.vbool = cpsw_ale_control_get(cpsw->ale, 0, ALE_BYPASS);
1753 break;
1754 default:
1755 return -EOPNOTSUPP;
1756 }
1757
1758 return 0;
1759 }
1760
1761 static int cpsw_dl_ale_ctrl_set(struct devlink *dl, u32 id,
1762 struct devlink_param_gset_ctx *ctx)
1763 {
1764 struct cpsw_devlink *dl_priv = devlink_priv(dl);
1765 struct cpsw_common *cpsw = dl_priv->cpsw;
1766 int ret = -EOPNOTSUPP;
1767
1768 dev_dbg(cpsw->dev, "%s id:%u\n", __func__, id);
1769
1770 switch (id) {
1771 case CPSW_DL_PARAM_ALE_BYPASS:
1772 ret = cpsw_ale_control_set(cpsw->ale, 0, ALE_BYPASS,
1773 ctx->val.vbool);
1774 if (!ret) {
1775 cpsw->ale_bypass = ctx->val.vbool;
1776 cpsw_port_offload_fwd_mark_update(cpsw);
1777 }
1778 break;
1779 default:
1780 return -EOPNOTSUPP;
1781 }
1782
1783 return 0;
1784 }
1785
1786 static const struct devlink_param cpsw_devlink_params[] = {
1787 DEVLINK_PARAM_DRIVER(CPSW_DL_PARAM_SWITCH_MODE,
1788 "switch_mode", DEVLINK_PARAM_TYPE_BOOL,
1789 BIT(DEVLINK_PARAM_CMODE_RUNTIME),
1790 cpsw_dl_switch_mode_get, cpsw_dl_switch_mode_set,
1791 NULL),
1792 DEVLINK_PARAM_DRIVER(CPSW_DL_PARAM_ALE_BYPASS,
1793 "ale_bypass", DEVLINK_PARAM_TYPE_BOOL,
1794 BIT(DEVLINK_PARAM_CMODE_RUNTIME),
1795 cpsw_dl_ale_ctrl_get, cpsw_dl_ale_ctrl_set, NULL),
1796 };
1797
1798 static int cpsw_register_devlink(struct cpsw_common *cpsw)
1799 {
1800 struct device *dev = cpsw->dev;
1801 struct cpsw_devlink *dl_priv;
1802 int ret = 0;
1803
1804 cpsw->devlink = devlink_alloc(&cpsw_devlink_ops, sizeof(*dl_priv));
1805 if (!cpsw->devlink)
1806 return -ENOMEM;
1807
1808 dl_priv = devlink_priv(cpsw->devlink);
1809 dl_priv->cpsw = cpsw;
1810
1811 ret = devlink_register(cpsw->devlink, dev);
1812 if (ret) {
1813 dev_err(dev, "DL reg fail ret:%d\n", ret);
1814 goto dl_free;
1815 }
1816
1817 ret = devlink_params_register(cpsw->devlink, cpsw_devlink_params,
1818 ARRAY_SIZE(cpsw_devlink_params));
1819 if (ret) {
1820 dev_err(dev, "DL params reg fail ret:%d\n", ret);
1821 goto dl_unreg;
1822 }
1823
1824 devlink_params_publish(cpsw->devlink);
1825 return ret;
1826
1827 dl_unreg:
1828 devlink_unregister(cpsw->devlink);
1829 dl_free:
1830 devlink_free(cpsw->devlink);
1831 return ret;
1832 }
1833
1834 static void cpsw_unregister_devlink(struct cpsw_common *cpsw)
1835 {
1836 devlink_params_unpublish(cpsw->devlink);
1837 devlink_params_unregister(cpsw->devlink, cpsw_devlink_params,
1838 ARRAY_SIZE(cpsw_devlink_params));
1839 devlink_unregister(cpsw->devlink);
1840 devlink_free(cpsw->devlink);
1841 }
1842
1843 static const struct of_device_id cpsw_of_mtable[] = {
1844 { .compatible = "ti,cpsw-switch"},
1845 { .compatible = "ti,am335x-cpsw-switch"},
1846 { .compatible = "ti,am4372-cpsw-switch"},
1847 { .compatible = "ti,dra7-cpsw-switch"},
1848 { /* sentinel */ },
1849 };
1850 MODULE_DEVICE_TABLE(of, cpsw_of_mtable);
1851
1852 static const struct soc_device_attribute cpsw_soc_devices[] = {
1853 { .family = "AM33xx", .revision = "ES1.0"},
1854 { /* sentinel */ }
1855 };
1856
1857 static int cpsw_probe(struct platform_device *pdev)
1858 {
1859 const struct soc_device_attribute *soc;
1860 struct device *dev = &pdev->dev;
1861 struct cpsw_common *cpsw;
1862 struct resource *ss_res;
1863 struct gpio_descs *mode;
1864 void __iomem *ss_regs;
1865 int ret = 0, ch;
1866 struct clk *clk;
1867 int irq;
1868
1869 cpsw = devm_kzalloc(dev, sizeof(struct cpsw_common), GFP_KERNEL);
1870 if (!cpsw)
1871 return -ENOMEM;
1872
1873 cpsw_slave_index = cpsw_slave_index_priv;
1874
1875 cpsw->dev = dev;
1876
1877 cpsw->slaves = devm_kcalloc(dev,
1878 CPSW_SLAVE_PORTS_NUM,
1879 sizeof(struct cpsw_slave),
1880 GFP_KERNEL);
1881 if (!cpsw->slaves)
1882 return -ENOMEM;
1883
1884 mode = devm_gpiod_get_array_optional(dev, "mode", GPIOD_OUT_LOW);
1885 if (IS_ERR(mode)) {
1886 ret = PTR_ERR(mode);
1887 dev_err(dev, "gpio request failed, ret %d\n", ret);
1888 return ret;
1889 }
1890
1891 clk = devm_clk_get(dev, "fck");
1892 if (IS_ERR(clk)) {
1893 ret = PTR_ERR(clk);
1894 dev_err(dev, "fck is not found %d\n", ret);
1895 return ret;
1896 }
1897 cpsw->bus_freq_mhz = clk_get_rate(clk) / 1000000;
1898
1899 ss_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1900 ss_regs = devm_ioremap_resource(dev, ss_res);
1901 if (IS_ERR(ss_regs)) {
1902 ret = PTR_ERR(ss_regs);
1903 return ret;
1904 }
1905 cpsw->regs = ss_regs;
1906
1907 irq = platform_get_irq_byname(pdev, "rx");
1908 if (irq < 0)
1909 return irq;
1910 cpsw->irqs_table[0] = irq;
1911
1912 irq = platform_get_irq_byname(pdev, "tx");
1913 if (irq < 0)
1914 return irq;
1915 cpsw->irqs_table[1] = irq;
1916
1917 irq = platform_get_irq_byname(pdev, "misc");
1918 if (irq <= 0)
1919 return irq;
1920 cpsw->misc_irq = irq;
1921
1922 platform_set_drvdata(pdev, cpsw);
1923 /* This may be required here for child devices. */
1924 pm_runtime_enable(dev);
1925
1926 /* Need to enable clocks with runtime PM api to access module
1927 * registers
1928 */
1929 ret = pm_runtime_get_sync(dev);
1930 if (ret < 0) {
1931 pm_runtime_put_noidle(dev);
1932 pm_runtime_disable(dev);
1933 return ret;
1934 }
1935
1936 ret = cpsw_probe_dt(cpsw);
1937 if (ret)
1938 goto clean_dt_ret;
1939
1940 soc = soc_device_match(cpsw_soc_devices);
1941 if (soc)
1942 cpsw->quirk_irq = true;
1943
1944 cpsw->rx_packet_max = rx_packet_max;
1945 cpsw->descs_pool_size = descs_pool_size;
1946 eth_random_addr(cpsw->base_mac);
1947
1948 ret = cpsw_init_common(cpsw, ss_regs, ale_ageout,
1949 (u32 __force)ss_res->start + CPSW2_BD_OFFSET,
1950 descs_pool_size);
1951 if (ret)
1952 goto clean_dt_ret;
1953
1954 cpsw->wr_regs = cpsw->version == CPSW_VERSION_1 ?
1955 ss_regs + CPSW1_WR_OFFSET :
1956 ss_regs + CPSW2_WR_OFFSET;
1957
1958 ch = cpsw->quirk_irq ? 0 : 7;
1959 cpsw->txv[0].ch = cpdma_chan_create(cpsw->dma, ch, cpsw_tx_handler, 0);
1960 if (IS_ERR(cpsw->txv[0].ch)) {
1961 dev_err(dev, "error initializing tx dma channel\n");
1962 ret = PTR_ERR(cpsw->txv[0].ch);
1963 goto clean_cpts;
1964 }
1965
1966 cpsw->rxv[0].ch = cpdma_chan_create(cpsw->dma, 0, cpsw_rx_handler, 1);
1967 if (IS_ERR(cpsw->rxv[0].ch)) {
1968 dev_err(dev, "error initializing rx dma channel\n");
1969 ret = PTR_ERR(cpsw->rxv[0].ch);
1970 goto clean_cpts;
1971 }
1972 cpsw_split_res(cpsw);
1973
1974 /* setup netdevs */
1975 ret = cpsw_create_ports(cpsw);
1976 if (ret)
1977 goto clean_unregister_netdev;
1978
1979 /* Grab RX and TX IRQs. Note that we also have RX_THRESHOLD and
1980 * MISC IRQs which are always kept disabled with this driver so
1981 * we will not request them.
1982 *
1983 * If anyone wants to implement support for those, make sure to
1984 * first request and append them to irqs_table array.
1985 */
1986
1987 ret = devm_request_irq(dev, cpsw->irqs_table[0], cpsw_rx_interrupt,
1988 0, dev_name(dev), cpsw);
1989 if (ret < 0) {
1990 dev_err(dev, "error attaching irq (%d)\n", ret);
1991 goto clean_unregister_netdev;
1992 }
1993
1994 ret = devm_request_irq(dev, cpsw->irqs_table[1], cpsw_tx_interrupt,
1995 0, dev_name(dev), cpsw);
1996 if (ret < 0) {
1997 dev_err(dev, "error attaching irq (%d)\n", ret);
1998 goto clean_unregister_netdev;
1999 }
2000
2001 if (!cpsw->cpts)
2002 goto skip_cpts;
2003
2004 ret = devm_request_irq(dev, cpsw->misc_irq, cpsw_misc_interrupt,
2005 0, dev_name(&pdev->dev), cpsw);
2006 if (ret < 0) {
2007 dev_err(dev, "error attaching misc irq (%d)\n", ret);
2008 goto clean_unregister_netdev;
2009 }
2010
2011 /* Enable misc CPTS evnt_pend IRQ */
2012 cpts_set_irqpoll(cpsw->cpts, false);
2013
2014 skip_cpts:
2015 ret = cpsw_register_notifiers(cpsw);
2016 if (ret)
2017 goto clean_unregister_netdev;
2018
2019 ret = cpsw_register_devlink(cpsw);
2020 if (ret)
2021 goto clean_unregister_notifiers;
2022
2023 ret = cpsw_register_ports(cpsw);
2024 if (ret)
2025 goto clean_unregister_notifiers;
2026
2027 dev_notice(dev, "initialized (regs %pa, pool size %d) hw_ver:%08X %d.%d (%d)\n",
2028 &ss_res->start, descs_pool_size,
2029 cpsw->version, CPSW_MAJOR_VERSION(cpsw->version),
2030 CPSW_MINOR_VERSION(cpsw->version),
2031 CPSW_RTL_VERSION(cpsw->version));
2032
2033 pm_runtime_put(dev);
2034
2035 return 0;
2036
2037 clean_unregister_notifiers:
2038 cpsw_unregister_notifiers(cpsw);
2039 clean_unregister_netdev:
2040 cpsw_unregister_ports(cpsw);
2041 clean_cpts:
2042 cpts_release(cpsw->cpts);
2043 cpdma_ctlr_destroy(cpsw->dma);
2044 clean_dt_ret:
2045 cpsw_remove_dt(cpsw);
2046 pm_runtime_put_sync(dev);
2047 pm_runtime_disable(dev);
2048 return ret;
2049 }
2050
2051 static int cpsw_remove(struct platform_device *pdev)
2052 {
2053 struct cpsw_common *cpsw = platform_get_drvdata(pdev);
2054 int ret;
2055
2056 ret = pm_runtime_get_sync(&pdev->dev);
2057 if (ret < 0) {
2058 pm_runtime_put_noidle(&pdev->dev);
2059 return ret;
2060 }
2061
2062 cpsw_unregister_notifiers(cpsw);
2063 cpsw_unregister_devlink(cpsw);
2064 cpsw_unregister_ports(cpsw);
2065
2066 cpts_release(cpsw->cpts);
2067 cpdma_ctlr_destroy(cpsw->dma);
2068 cpsw_remove_dt(cpsw);
2069 pm_runtime_put_sync(&pdev->dev);
2070 pm_runtime_disable(&pdev->dev);
2071 return 0;
2072 }
2073
2074 static int __maybe_unused cpsw_suspend(struct device *dev)
2075 {
2076 struct cpsw_common *cpsw = dev_get_drvdata(dev);
2077 int i;
2078
2079 rtnl_lock();
2080
2081 for (i = 0; i < cpsw->data.slaves; i++) {
2082 struct net_device *ndev = cpsw->slaves[i].ndev;
2083
2084 if (!(ndev && netif_running(ndev)))
2085 continue;
2086
2087 cpsw_ndo_stop(ndev);
2088 }
2089
2090 rtnl_unlock();
2091
2092 /* Select sleep pin state */
2093 pinctrl_pm_select_sleep_state(dev);
2094
2095 return 0;
2096 }
2097
2098 static int __maybe_unused cpsw_resume(struct device *dev)
2099 {
2100 struct cpsw_common *cpsw = dev_get_drvdata(dev);
2101 int i;
2102
2103 /* Select default pin state */
2104 pinctrl_pm_select_default_state(dev);
2105
2106 /* shut up ASSERT_RTNL() warning in netif_set_real_num_tx/rx_queues */
2107 rtnl_lock();
2108
2109 for (i = 0; i < cpsw->data.slaves; i++) {
2110 struct net_device *ndev = cpsw->slaves[i].ndev;
2111
2112 if (!(ndev && netif_running(ndev)))
2113 continue;
2114
2115 cpsw_ndo_open(ndev);
2116 }
2117
2118 rtnl_unlock();
2119
2120 return 0;
2121 }
2122
2123 static SIMPLE_DEV_PM_OPS(cpsw_pm_ops, cpsw_suspend, cpsw_resume);
2124
2125 static struct platform_driver cpsw_driver = {
2126 .driver = {
2127 .name = "cpsw-switch",
2128 .pm = &cpsw_pm_ops,
2129 .of_match_table = cpsw_of_mtable,
2130 },
2131 .probe = cpsw_probe,
2132 .remove = cpsw_remove,
2133 };
2134
2135 module_platform_driver(cpsw_driver);
2136
2137 MODULE_LICENSE("GPL");
2138 MODULE_DESCRIPTION("TI CPSW switchdev Ethernet driver");
Linux with added FPC-III support