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Merge tag 'trace-printf-v6.13' of git://git.kernel.org/pub/scm/linux/kernel/git/trace...
[drm/drm-misc.git] / drivers / net / ethernet / ti / cpsw_new.c
bloba98bcc5eb5663df16a2f032806e34891768d2903
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/platform_device.h>
11 #include <linux/timer.h>
12 #include <linux/module.h>
13 #include <linux/irqreturn.h>
14 #include <linux/interrupt.h>
15 #include <linux/if_ether.h>
16 #include <linux/etherdevice.h>
17 #include <linux/net_tstamp.h>
18 #include <linux/phy.h>
19 #include <linux/phy/phy.h>
20 #include <linux/delay.h>
21 #include <linux/pinctrl/consumer.h>
22 #include <linux/pm_runtime.h>
23 #include <linux/gpio/consumer.h>
24 #include <linux/of.h>
25 #include <linux/of_mdio.h>
26 #include <linux/of_net.h>
27 #include <linux/of_platform.h>
28 #include <linux/if_vlan.h>
29 #include <linux/kmemleak.h>
30 #include <linux/sys_soc.h>
31
32 #include <net/switchdev.h>
33 #include <net/page_pool/helpers.h>
34 #include <net/pkt_cls.h>
35 #include <net/devlink.h>
36
37 #include "cpsw.h"
38 #include "cpsw_ale.h"
39 #include "cpsw_priv.h"
40 #include "cpsw_sl.h"
41 #include "cpsw_switchdev.h"
42 #include "cpts.h"
43 #include "davinci_cpdma.h"
44
45 #include <net/pkt_sched.h>
46
47 static int debug_level;
48 static int ale_ageout = CPSW_ALE_AGEOUT_DEFAULT;
49 static int rx_packet_max = CPSW_MAX_PACKET_SIZE;
50 static int descs_pool_size = CPSW_CPDMA_DESCS_POOL_SIZE_DEFAULT;
51
52 struct cpsw_devlink {
53 struct cpsw_common *cpsw;
54 };
55
56 enum cpsw_devlink_param_id {
57 CPSW_DEVLINK_PARAM_ID_BASE = DEVLINK_PARAM_GENERIC_ID_MAX,
58 CPSW_DL_PARAM_SWITCH_MODE,
59 CPSW_DL_PARAM_ALE_BYPASS,
60 };
61
62 /* struct cpsw_common is not needed, kept here for compatibility
63 * reasons witrh the old driver
64 */
65 static int cpsw_slave_index_priv(struct cpsw_common *cpsw,
66 struct cpsw_priv *priv)
67 {
68 if (priv->emac_port == HOST_PORT_NUM)
69 return -1;
70
71 return priv->emac_port - 1;
72 }
73
74 static bool cpsw_is_switch_en(struct cpsw_common *cpsw)
75 {
76 return !cpsw->data.dual_emac;
77 }
78
79 static void cpsw_set_promiscious(struct net_device *ndev, bool enable)
80 {
81 struct cpsw_common *cpsw = ndev_to_cpsw(ndev);
82 bool enable_uni = false;
83 int i;
84
85 if (cpsw_is_switch_en(cpsw))
86 return;
87
88 /* Enabling promiscuous mode for one interface will be
89 * common for both the interface as the interface shares
90 * the same hardware resource.
91 */
92 for (i = 0; i < cpsw->data.slaves; i++)
93 if (cpsw->slaves[i].ndev &&
94 (cpsw->slaves[i].ndev->flags & IFF_PROMISC))
95 enable_uni = true;
96
97 if (!enable && enable_uni) {
98 enable = enable_uni;
99 dev_dbg(cpsw->dev, "promiscuity not disabled as the other interface is still in promiscuity mode\n");
100 }
101
102 if (enable) {
103 /* Enable unknown unicast, reg/unreg mcast */
104 cpsw_ale_control_set(cpsw->ale, HOST_PORT_NUM,
105 ALE_P0_UNI_FLOOD, 1);
106
107 dev_dbg(cpsw->dev, "promiscuity enabled\n");
108 } else {
109 /* Disable unknown unicast */
110 cpsw_ale_control_set(cpsw->ale, HOST_PORT_NUM,
111 ALE_P0_UNI_FLOOD, 0);
112 dev_dbg(cpsw->dev, "promiscuity disabled\n");
113 }
114 }
115
116 /**
117 * cpsw_set_mc - adds multicast entry to the table if it's not added or deletes
118 * if it's not deleted
119 * @ndev: device to sync
120 * @addr: address to be added or deleted
121 * @vid: vlan id, if vid < 0 set/unset address for real device
122 * @add: add address if the flag is set or remove otherwise
123 */
124 static int cpsw_set_mc(struct net_device *ndev, const u8 *addr,
125 int vid, int add)
126 {
127 struct cpsw_priv *priv = netdev_priv(ndev);
128 struct cpsw_common *cpsw = priv->cpsw;
129 int mask, flags, ret, slave_no;
130
131 slave_no = cpsw_slave_index(cpsw, priv);
132 if (vid < 0)
133 vid = cpsw->slaves[slave_no].port_vlan;
134
135 mask = ALE_PORT_HOST;
136 flags = vid ? ALE_VLAN : 0;
137
138 if (add)
139 ret = cpsw_ale_add_mcast(cpsw->ale, addr, mask, flags, vid, 0);
140 else
141 ret = cpsw_ale_del_mcast(cpsw->ale, addr, 0, flags, vid);
142
143 return ret;
144 }
145
146 static int cpsw_update_vlan_mc(struct net_device *vdev, int vid, void *ctx)
147 {
148 struct addr_sync_ctx *sync_ctx = ctx;
149 struct netdev_hw_addr *ha;
150 int found = 0, ret = 0;
151
152 if (!vdev || !(vdev->flags & IFF_UP))
153 return 0;
154
155 /* vlan address is relevant if its sync_cnt != 0 */
156 netdev_for_each_mc_addr(ha, vdev) {
157 if (ether_addr_equal(ha->addr, sync_ctx->addr)) {
158 found = ha->sync_cnt;
159 break;
160 }
161 }
162
163 if (found)
164 sync_ctx->consumed++;
165
166 if (sync_ctx->flush) {
167 if (!found)
168 cpsw_set_mc(sync_ctx->ndev, sync_ctx->addr, vid, 0);
169 return 0;
170 }
171
172 if (found)
173 ret = cpsw_set_mc(sync_ctx->ndev, sync_ctx->addr, vid, 1);
174
175 return ret;
176 }
177
178 static int cpsw_add_mc_addr(struct net_device *ndev, const u8 *addr, int num)
179 {
180 struct addr_sync_ctx sync_ctx;
181 int ret;
182
183 sync_ctx.consumed = 0;
184 sync_ctx.addr = addr;
185 sync_ctx.ndev = ndev;
186 sync_ctx.flush = 0;
187
188 ret = vlan_for_each(ndev, cpsw_update_vlan_mc, &sync_ctx);
189 if (sync_ctx.consumed < num && !ret)
190 ret = cpsw_set_mc(ndev, addr, -1, 1);
191
192 return ret;
193 }
194
195 static int cpsw_del_mc_addr(struct net_device *ndev, const u8 *addr, int num)
196 {
197 struct addr_sync_ctx sync_ctx;
198
199 sync_ctx.consumed = 0;
200 sync_ctx.addr = addr;
201 sync_ctx.ndev = ndev;
202 sync_ctx.flush = 1;
203
204 vlan_for_each(ndev, cpsw_update_vlan_mc, &sync_ctx);
205 if (sync_ctx.consumed == num)
206 cpsw_set_mc(ndev, addr, -1, 0);
207
208 return 0;
209 }
210
211 static int cpsw_purge_vlan_mc(struct net_device *vdev, int vid, void *ctx)
212 {
213 struct addr_sync_ctx *sync_ctx = ctx;
214 struct netdev_hw_addr *ha;
215 int found = 0;
216
217 if (!vdev || !(vdev->flags & IFF_UP))
218 return 0;
219
220 /* vlan address is relevant if its sync_cnt != 0 */
221 netdev_for_each_mc_addr(ha, vdev) {
222 if (ether_addr_equal(ha->addr, sync_ctx->addr)) {
223 found = ha->sync_cnt;
224 break;
225 }
226 }
227
228 if (!found)
229 return 0;
230
231 sync_ctx->consumed++;
232 cpsw_set_mc(sync_ctx->ndev, sync_ctx->addr, vid, 0);
233 return 0;
234 }
235
236 static int cpsw_purge_all_mc(struct net_device *ndev, const u8 *addr, int num)
237 {
238 struct addr_sync_ctx sync_ctx;
239
240 sync_ctx.addr = addr;
241 sync_ctx.ndev = ndev;
242 sync_ctx.consumed = 0;
243
244 vlan_for_each(ndev, cpsw_purge_vlan_mc, &sync_ctx);
245 if (sync_ctx.consumed < num)
246 cpsw_set_mc(ndev, addr, -1, 0);
247
248 return 0;
249 }
250
251 static void cpsw_ndo_set_rx_mode(struct net_device *ndev)
252 {
253 struct cpsw_priv *priv = netdev_priv(ndev);
254 struct cpsw_common *cpsw = priv->cpsw;
255
256 if (ndev->flags & IFF_PROMISC) {
257 /* Enable promiscuous mode */
258 cpsw_set_promiscious(ndev, true);
259 cpsw_ale_set_allmulti(cpsw->ale, IFF_ALLMULTI, priv->emac_port);
260 return;
261 }
262
263 /* Disable promiscuous mode */
264 cpsw_set_promiscious(ndev, false);
265
266 /* Restore allmulti on vlans if necessary */
267 cpsw_ale_set_allmulti(cpsw->ale,
268 ndev->flags & IFF_ALLMULTI, priv->emac_port);
269
270 /* add/remove mcast address either for real netdev or for vlan */
271 __hw_addr_ref_sync_dev(&ndev->mc, ndev, cpsw_add_mc_addr,
272 cpsw_del_mc_addr);
273 }
274
275 static unsigned int cpsw_rxbuf_total_len(unsigned int len)
276 {
277 len += CPSW_HEADROOM_NA;
278 len += SKB_DATA_ALIGN(sizeof(struct skb_shared_info));
279
280 return SKB_DATA_ALIGN(len);
281 }
282
283 static void cpsw_rx_handler(void *token, int len, int status)
284 {
285 struct page *new_page, *page = token;
286 void *pa = page_address(page);
287 int headroom = CPSW_HEADROOM_NA;
288 struct cpsw_meta_xdp *xmeta;
289 struct cpsw_common *cpsw;
290 struct net_device *ndev;
291 int port, ch, pkt_size;
292 struct cpsw_priv *priv;
293 struct page_pool *pool;
294 struct sk_buff *skb;
295 struct xdp_buff xdp;
296 int ret = 0;
297 dma_addr_t dma;
298
299 xmeta = pa + CPSW_XMETA_OFFSET;
300 cpsw = ndev_to_cpsw(xmeta->ndev);
301 ndev = xmeta->ndev;
302 pkt_size = cpsw->rx_packet_max;
303 ch = xmeta->ch;
304
305 if (status >= 0) {
306 port = CPDMA_RX_SOURCE_PORT(status);
307 if (port)
308 ndev = cpsw->slaves[--port].ndev;
309 }
310
311 priv = netdev_priv(ndev);
312 pool = cpsw->page_pool[ch];
313
314 if (unlikely(status < 0) || unlikely(!netif_running(ndev))) {
315 /* In dual emac mode check for all interfaces */
316 if (cpsw->usage_count && status >= 0) {
317 /* The packet received is for the interface which
318 * is already down and the other interface is up
319 * and running, instead of freeing which results
320 * in reducing of the number of rx descriptor in
321 * DMA engine, requeue page back to cpdma.
322 */
323 new_page = page;
324 goto requeue;
325 }
326
327 /* the interface is going down, pages are purged */
328 page_pool_recycle_direct(pool, page);
329 return;
330 }
331
332 new_page = page_pool_dev_alloc_pages(pool);
333 if (unlikely(!new_page)) {
334 new_page = page;
335 ndev->stats.rx_dropped++;
336 goto requeue;
337 }
338
339 if (priv->xdp_prog) {
340 int size = len;
341
342 xdp_init_buff(&xdp, PAGE_SIZE, &priv->xdp_rxq[ch]);
343 if (status & CPDMA_RX_VLAN_ENCAP) {
344 headroom += CPSW_RX_VLAN_ENCAP_HDR_SIZE;
345 size -= CPSW_RX_VLAN_ENCAP_HDR_SIZE;
346 }
347
348 xdp_prepare_buff(&xdp, pa, headroom, size, false);
349
350 ret = cpsw_run_xdp(priv, ch, &xdp, page, priv->emac_port, &len);
351 if (ret != CPSW_XDP_PASS)
352 goto requeue;
353
354 headroom = xdp.data - xdp.data_hard_start;
355
356 /* XDP prog can modify vlan tag, so can't use encap header */
357 status &= ~CPDMA_RX_VLAN_ENCAP;
358 }
359
360 /* pass skb to netstack if no XDP prog or returned XDP_PASS */
361 skb = build_skb(pa, cpsw_rxbuf_total_len(pkt_size));
362 if (!skb) {
363 ndev->stats.rx_dropped++;
364 page_pool_recycle_direct(pool, page);
365 goto requeue;
366 }
367
368 skb->offload_fwd_mark = priv->offload_fwd_mark;
369 skb_reserve(skb, headroom);
370 skb_put(skb, len);
371 skb->dev = ndev;
372 if (status & CPDMA_RX_VLAN_ENCAP)
373 cpsw_rx_vlan_encap(skb);
374 if (priv->rx_ts_enabled)
375 cpts_rx_timestamp(cpsw->cpts, skb);
376 skb->protocol = eth_type_trans(skb, ndev);
377
378 /* mark skb for recycling */
379 skb_mark_for_recycle(skb);
380 netif_receive_skb(skb);
381
382 ndev->stats.rx_bytes += len;
383 ndev->stats.rx_packets++;
384
385 requeue:
386 xmeta = page_address(new_page) + CPSW_XMETA_OFFSET;
387 xmeta->ndev = ndev;
388 xmeta->ch = ch;
389
390 dma = page_pool_get_dma_addr(new_page) + CPSW_HEADROOM_NA;
391 ret = cpdma_chan_submit_mapped(cpsw->rxv[ch].ch, new_page, dma,
392 pkt_size, 0);
393 if (ret < 0) {
394 WARN_ON(ret == -ENOMEM);
395 page_pool_recycle_direct(pool, new_page);
396 }
397 }
398
399 static int cpsw_add_vlan_ale_entry(struct cpsw_priv *priv,
400 unsigned short vid)
401 {
402 struct cpsw_common *cpsw = priv->cpsw;
403 int unreg_mcast_mask = 0;
404 int mcast_mask;
405 u32 port_mask;
406 int ret;
407
408 port_mask = (1 << priv->emac_port) | ALE_PORT_HOST;
409
410 mcast_mask = ALE_PORT_HOST;
411 if (priv->ndev->flags & IFF_ALLMULTI)
412 unreg_mcast_mask = mcast_mask;
413
414 ret = cpsw_ale_add_vlan(cpsw->ale, vid, port_mask, 0, port_mask,
415 unreg_mcast_mask);
416 if (ret != 0)
417 return ret;
418
419 ret = cpsw_ale_add_ucast(cpsw->ale, priv->mac_addr,
420 HOST_PORT_NUM, ALE_VLAN, vid);
421 if (ret != 0)
422 goto clean_vid;
423
424 ret = cpsw_ale_add_mcast(cpsw->ale, priv->ndev->broadcast,
425 mcast_mask, ALE_VLAN, vid, 0);
426 if (ret != 0)
427 goto clean_vlan_ucast;
428 return 0;
429
430 clean_vlan_ucast:
431 cpsw_ale_del_ucast(cpsw->ale, priv->mac_addr,
432 HOST_PORT_NUM, ALE_VLAN, vid);
433 clean_vid:
434 cpsw_ale_del_vlan(cpsw->ale, vid, 0);
435 return ret;
436 }
437
438 static int cpsw_ndo_vlan_rx_add_vid(struct net_device *ndev,
439 __be16 proto, u16 vid)
440 {
441 struct cpsw_priv *priv = netdev_priv(ndev);
442 struct cpsw_common *cpsw = priv->cpsw;
443 int ret, i;
444
445 if (cpsw_is_switch_en(cpsw)) {
446 dev_dbg(cpsw->dev, ".ndo_vlan_rx_add_vid called in switch mode\n");
447 return 0;
448 }
449
450 if (vid == cpsw->data.default_vlan)
451 return 0;
452
453 ret = pm_runtime_resume_and_get(cpsw->dev);
454 if (ret < 0)
455 return ret;
456
457 /* In dual EMAC, reserved VLAN id should not be used for
458 * creating VLAN interfaces as this can break the dual
459 * EMAC port separation
460 */
461 for (i = 0; i < cpsw->data.slaves; i++) {
462 if (cpsw->slaves[i].ndev &&
463 vid == cpsw->slaves[i].port_vlan) {
464 ret = -EINVAL;
465 goto err;
466 }
467 }
468
469 dev_dbg(priv->dev, "Adding vlanid %d to vlan filter\n", vid);
470 ret = cpsw_add_vlan_ale_entry(priv, vid);
471 err:
472 pm_runtime_put(cpsw->dev);
473 return ret;
474 }
475
476 static int cpsw_restore_vlans(struct net_device *vdev, int vid, void *arg)
477 {
478 struct cpsw_priv *priv = arg;
479
480 if (!vdev || !vid)
481 return 0;
482
483 cpsw_ndo_vlan_rx_add_vid(priv->ndev, 0, vid);
484 return 0;
485 }
486
487 /* restore resources after port reset */
488 static void cpsw_restore(struct cpsw_priv *priv)
489 {
490 struct cpsw_common *cpsw = priv->cpsw;
491
492 /* restore vlan configurations */
493 vlan_for_each(priv->ndev, cpsw_restore_vlans, priv);
494
495 /* restore MQPRIO offload */
496 cpsw_mqprio_resume(&cpsw->slaves[priv->emac_port - 1], priv);
497
498 /* restore CBS offload */
499 cpsw_cbs_resume(&cpsw->slaves[priv->emac_port - 1], priv);
500
501 cpsw_qos_clsflower_resume(priv);
502 }
503
504 static void cpsw_init_stp_ale_entry(struct cpsw_common *cpsw)
505 {
506 static const char stpa[] = {0x01, 0x80, 0xc2, 0x0, 0x0, 0x0};
507
508 cpsw_ale_add_mcast(cpsw->ale, stpa,
509 ALE_PORT_HOST, ALE_SUPER, 0,
510 ALE_MCAST_BLOCK_LEARN_FWD);
511 }
512
513 static void cpsw_init_host_port_switch(struct cpsw_common *cpsw)
514 {
515 int vlan = cpsw->data.default_vlan;
516
517 writel(CPSW_FIFO_NORMAL_MODE, &cpsw->host_port_regs->tx_in_ctl);
518
519 writel(vlan, &cpsw->host_port_regs->port_vlan);
520
521 cpsw_ale_add_vlan(cpsw->ale, vlan, ALE_ALL_PORTS,
522 ALE_ALL_PORTS, ALE_ALL_PORTS,
523 ALE_PORT_1 | ALE_PORT_2);
524
525 cpsw_init_stp_ale_entry(cpsw);
526
527 cpsw_ale_control_set(cpsw->ale, HOST_PORT_NUM, ALE_P0_UNI_FLOOD, 1);
528 dev_dbg(cpsw->dev, "Set P0_UNI_FLOOD\n");
529 cpsw_ale_control_set(cpsw->ale, HOST_PORT_NUM, ALE_PORT_NOLEARN, 0);
530 }
531
532 static void cpsw_init_host_port_dual_mac(struct cpsw_common *cpsw)
533 {
534 int vlan = cpsw->data.default_vlan;
535
536 writel(CPSW_FIFO_DUAL_MAC_MODE, &cpsw->host_port_regs->tx_in_ctl);
537
538 cpsw_ale_control_set(cpsw->ale, HOST_PORT_NUM, ALE_P0_UNI_FLOOD, 0);
539 dev_dbg(cpsw->dev, "unset P0_UNI_FLOOD\n");
540
541 writel(vlan, &cpsw->host_port_regs->port_vlan);
542
543 cpsw_ale_add_vlan(cpsw->ale, vlan, ALE_ALL_PORTS, ALE_ALL_PORTS, 0, 0);
544 /* learning make no sense in dual_mac mode */
545 cpsw_ale_control_set(cpsw->ale, HOST_PORT_NUM, ALE_PORT_NOLEARN, 1);
546 }
547
548 static void cpsw_init_host_port(struct cpsw_priv *priv)
549 {
550 struct cpsw_common *cpsw = priv->cpsw;
551 u32 control_reg;
552
553 /* soft reset the controller and initialize ale */
554 soft_reset("cpsw", &cpsw->regs->soft_reset);
555 cpsw_ale_start(cpsw->ale);
556
557 /* switch to vlan unaware mode */
558 cpsw_ale_control_set(cpsw->ale, HOST_PORT_NUM, ALE_VLAN_AWARE,
559 CPSW_ALE_VLAN_AWARE);
560 control_reg = readl(&cpsw->regs->control);
561 control_reg |= CPSW_VLAN_AWARE | CPSW_RX_VLAN_ENCAP;
562 writel(control_reg, &cpsw->regs->control);
563
564 /* setup host port priority mapping */
565 writel_relaxed(CPDMA_TX_PRIORITY_MAP,
566 &cpsw->host_port_regs->cpdma_tx_pri_map);
567 writel_relaxed(0, &cpsw->host_port_regs->cpdma_rx_chan_map);
568
569 /* disable priority elevation */
570 writel_relaxed(0, &cpsw->regs->ptype);
571
572 /* enable statistics collection only on all ports */
573 writel_relaxed(0x7, &cpsw->regs->stat_port_en);
574
575 /* Enable internal fifo flow control */
576 writel(0x7, &cpsw->regs->flow_control);
577
578 if (cpsw_is_switch_en(cpsw))
579 cpsw_init_host_port_switch(cpsw);
580 else
581 cpsw_init_host_port_dual_mac(cpsw);
582
583 cpsw_ale_control_set(cpsw->ale, HOST_PORT_NUM,
584 ALE_PORT_STATE, ALE_PORT_STATE_FORWARD);
585 }
586
587 static void cpsw_port_add_dual_emac_def_ale_entries(struct cpsw_priv *priv,
588 struct cpsw_slave *slave)
589 {
590 u32 port_mask = 1 << priv->emac_port | ALE_PORT_HOST;
591 struct cpsw_common *cpsw = priv->cpsw;
592 u32 reg;
593
594 reg = (cpsw->version == CPSW_VERSION_1) ? CPSW1_PORT_VLAN :
595 CPSW2_PORT_VLAN;
596 slave_write(slave, slave->port_vlan, reg);
597
598 cpsw_ale_add_vlan(cpsw->ale, slave->port_vlan, port_mask,
599 port_mask, port_mask, 0);
600 cpsw_ale_add_mcast(cpsw->ale, priv->ndev->broadcast,
601 ALE_PORT_HOST, ALE_VLAN, slave->port_vlan,
602 ALE_MCAST_FWD);
603 cpsw_ale_add_ucast(cpsw->ale, priv->mac_addr,
604 HOST_PORT_NUM, ALE_VLAN |
605 ALE_SECURE, slave->port_vlan);
606 cpsw_ale_control_set(cpsw->ale, priv->emac_port,
607 ALE_PORT_DROP_UNKNOWN_VLAN, 1);
608 /* learning make no sense in dual_mac mode */
609 cpsw_ale_control_set(cpsw->ale, priv->emac_port,
610 ALE_PORT_NOLEARN, 1);
611 }
612
613 static void cpsw_port_add_switch_def_ale_entries(struct cpsw_priv *priv,
614 struct cpsw_slave *slave)
615 {
616 u32 port_mask = 1 << priv->emac_port | ALE_PORT_HOST;
617 struct cpsw_common *cpsw = priv->cpsw;
618 u32 reg;
619
620 cpsw_ale_control_set(cpsw->ale, priv->emac_port,
621 ALE_PORT_DROP_UNKNOWN_VLAN, 0);
622 cpsw_ale_control_set(cpsw->ale, priv->emac_port,
623 ALE_PORT_NOLEARN, 0);
624 /* disabling SA_UPDATE required to make stp work, without this setting
625 * Host MAC addresses will jump between ports.
626 * As per TRM MAC address can be defined as unicast supervisory (super)
627 * by setting both (ALE_BLOCKED | ALE_SECURE) which should prevent
628 * SA_UPDATE, but HW seems works incorrectly and setting ALE_SECURE
629 * causes STP packets to be dropped due to ingress filter
630 * if (source address found) and (secure) and
631 * (receive port number != port_number))
632 * then discard the packet
633 */
634 cpsw_ale_control_set(cpsw->ale, priv->emac_port,
635 ALE_PORT_NO_SA_UPDATE, 1);
636
637 cpsw_ale_add_mcast(cpsw->ale, priv->ndev->broadcast,
638 port_mask, ALE_VLAN, slave->port_vlan,
639 ALE_MCAST_FWD_2);
640 cpsw_ale_add_ucast(cpsw->ale, priv->mac_addr,
641 HOST_PORT_NUM, ALE_VLAN, slave->port_vlan);
642
643 reg = (cpsw->version == CPSW_VERSION_1) ? CPSW1_PORT_VLAN :
644 CPSW2_PORT_VLAN;
645 slave_write(slave, slave->port_vlan, reg);
646 }
647
648 static void cpsw_adjust_link(struct net_device *ndev)
649 {
650 struct cpsw_priv *priv = netdev_priv(ndev);
651 struct cpsw_common *cpsw = priv->cpsw;
652 struct cpsw_slave *slave;
653 struct phy_device *phy;
654 u32 mac_control = 0;
655
656 slave = &cpsw->slaves[priv->emac_port - 1];
657 phy = slave->phy;
658
659 if (!phy)
660 return;
661
662 if (phy->link) {
663 mac_control = CPSW_SL_CTL_GMII_EN;
664
665 if (phy->speed == 1000)
666 mac_control |= CPSW_SL_CTL_GIG;
667 if (phy->duplex)
668 mac_control |= CPSW_SL_CTL_FULLDUPLEX;
669
670 /* set speed_in input in case RMII mode is used in 100Mbps */
671 if (phy->speed == 100)
672 mac_control |= CPSW_SL_CTL_IFCTL_A;
673 /* in band mode only works in 10Mbps RGMII mode */
674 else if ((phy->speed == 10) && phy_interface_is_rgmii(phy))
675 mac_control |= CPSW_SL_CTL_EXT_EN; /* In Band mode */
676
677 if (priv->rx_pause)
678 mac_control |= CPSW_SL_CTL_RX_FLOW_EN;
679
680 if (priv->tx_pause)
681 mac_control |= CPSW_SL_CTL_TX_FLOW_EN;
682
683 if (mac_control != slave->mac_control)
684 cpsw_sl_ctl_set(slave->mac_sl, mac_control);
685
686 /* enable forwarding */
687 cpsw_ale_control_set(cpsw->ale, priv->emac_port,
688 ALE_PORT_STATE, ALE_PORT_STATE_FORWARD);
689
690 netif_tx_wake_all_queues(ndev);
691
692 if (priv->shp_cfg_speed &&
693 priv->shp_cfg_speed != slave->phy->speed &&
694 !cpsw_shp_is_off(priv))
695 dev_warn(priv->dev, "Speed was changed, CBS shaper speeds are changed!");
696 } else {
697 netif_tx_stop_all_queues(ndev);
698
699 mac_control = 0;
700 /* disable forwarding */
701 cpsw_ale_control_set(cpsw->ale, priv->emac_port,
702 ALE_PORT_STATE, ALE_PORT_STATE_DISABLE);
703
704 cpsw_sl_wait_for_idle(slave->mac_sl, 100);
705
706 cpsw_sl_ctl_reset(slave->mac_sl);
707 }
708
709 if (mac_control != slave->mac_control)
710 phy_print_status(phy);
711
712 slave->mac_control = mac_control;
713
714 if (phy->link && cpsw_need_resplit(cpsw))
715 cpsw_split_res(cpsw);
716 }
717
718 static void cpsw_slave_open(struct cpsw_slave *slave, struct cpsw_priv *priv)
719 {
720 struct cpsw_common *cpsw = priv->cpsw;
721 struct phy_device *phy;
722
723 cpsw_sl_reset(slave->mac_sl, 100);
724 cpsw_sl_ctl_reset(slave->mac_sl);
725
726 /* setup priority mapping */
727 cpsw_sl_reg_write(slave->mac_sl, CPSW_SL_RX_PRI_MAP,
728 RX_PRIORITY_MAPPING);
729
730 switch (cpsw->version) {
731 case CPSW_VERSION_1:
732 slave_write(slave, TX_PRIORITY_MAPPING, CPSW1_TX_PRI_MAP);
733 /* Increase RX FIFO size to 5 for supporting fullduplex
734 * flow control mode
735 */
736 slave_write(slave,
737 (CPSW_MAX_BLKS_TX << CPSW_MAX_BLKS_TX_SHIFT) |
738 CPSW_MAX_BLKS_RX, CPSW1_MAX_BLKS);
739 break;
740 case CPSW_VERSION_2:
741 case CPSW_VERSION_3:
742 case CPSW_VERSION_4:
743 slave_write(slave, TX_PRIORITY_MAPPING, CPSW2_TX_PRI_MAP);
744 /* Increase RX FIFO size to 5 for supporting fullduplex
745 * flow control mode
746 */
747 slave_write(slave,
748 (CPSW_MAX_BLKS_TX << CPSW_MAX_BLKS_TX_SHIFT) |
749 CPSW_MAX_BLKS_RX, CPSW2_MAX_BLKS);
750 break;
751 }
752
753 /* setup max packet size, and mac address */
754 cpsw_sl_reg_write(slave->mac_sl, CPSW_SL_RX_MAXLEN,
755 cpsw->rx_packet_max);
756 cpsw_set_slave_mac(slave, priv);
757
758 slave->mac_control = 0; /* no link yet */
759
760 if (cpsw_is_switch_en(cpsw))
761 cpsw_port_add_switch_def_ale_entries(priv, slave);
762 else
763 cpsw_port_add_dual_emac_def_ale_entries(priv, slave);
764
765 if (!slave->data->phy_node)
766 dev_err(priv->dev, "no phy found on slave %d\n",
767 slave->slave_num);
768 phy = of_phy_connect(priv->ndev, slave->data->phy_node,
769 &cpsw_adjust_link, 0, slave->data->phy_if);
770 if (!phy) {
771 dev_err(priv->dev, "phy \"%pOF\" not found on slave %d\n",
772 slave->data->phy_node,
773 slave->slave_num);
774 return;
775 }
776
777 phy->mac_managed_pm = true;
778
779 slave->phy = phy;
780
781 phy_attached_info(slave->phy);
782
783 phy_start(slave->phy);
784
785 /* Configure GMII_SEL register */
786 phy_set_mode_ext(slave->data->ifphy, PHY_MODE_ETHERNET,
787 slave->data->phy_if);
788 }
789
790 static int cpsw_ndo_stop(struct net_device *ndev)
791 {
792 struct cpsw_priv *priv = netdev_priv(ndev);
793 struct cpsw_common *cpsw = priv->cpsw;
794 struct cpsw_slave *slave;
795
796 cpsw_info(priv, ifdown, "shutting down ndev\n");
797 slave = &cpsw->slaves[priv->emac_port - 1];
798 if (slave->phy)
799 phy_stop(slave->phy);
800
801 netif_tx_stop_all_queues(priv->ndev);
802
803 if (slave->phy) {
804 phy_disconnect(slave->phy);
805 slave->phy = NULL;
806 }
807
808 __hw_addr_ref_unsync_dev(&ndev->mc, ndev, cpsw_purge_all_mc);
809
810 if (cpsw->usage_count <= 1) {
811 napi_disable(&cpsw->napi_rx);
812 napi_disable(&cpsw->napi_tx);
813 cpts_unregister(cpsw->cpts);
814 cpsw_intr_disable(cpsw);
815 cpdma_ctlr_stop(cpsw->dma);
816 cpsw_ale_stop(cpsw->ale);
817 cpsw_destroy_xdp_rxqs(cpsw);
818 }
819
820 if (cpsw_need_resplit(cpsw))
821 cpsw_split_res(cpsw);
822
823 cpsw->usage_count--;
824 pm_runtime_put_sync(cpsw->dev);
825 return 0;
826 }
827
828 static int cpsw_ndo_open(struct net_device *ndev)
829 {
830 struct cpsw_priv *priv = netdev_priv(ndev);
831 struct cpsw_common *cpsw = priv->cpsw;
832 int ret;
833
834 dev_info(priv->dev, "starting ndev. mode: %s\n",
835 cpsw_is_switch_en(cpsw) ? "switch" : "dual_mac");
836 ret = pm_runtime_resume_and_get(cpsw->dev);
837 if (ret < 0)
838 return ret;
839
840 /* Notify the stack of the actual queue counts. */
841 ret = netif_set_real_num_tx_queues(ndev, cpsw->tx_ch_num);
842 if (ret) {
843 dev_err(priv->dev, "cannot set real number of tx queues\n");
844 goto pm_cleanup;
845 }
846
847 ret = netif_set_real_num_rx_queues(ndev, cpsw->rx_ch_num);
848 if (ret) {
849 dev_err(priv->dev, "cannot set real number of rx queues\n");
850 goto pm_cleanup;
851 }
852
853 /* Initialize host and slave ports */
854 if (!cpsw->usage_count)
855 cpsw_init_host_port(priv);
856 cpsw_slave_open(&cpsw->slaves[priv->emac_port - 1], priv);
857
858 /* initialize shared resources for every ndev */
859 if (!cpsw->usage_count) {
860 /* create rxqs for both infs in dual mac as they use same pool
861 * and must be destroyed together when no users.
862 */
863 ret = cpsw_create_xdp_rxqs(cpsw);
864 if (ret < 0)
865 goto err_cleanup;
866
867 ret = cpsw_fill_rx_channels(priv);
868 if (ret < 0)
869 goto err_cleanup;
870
871 if (cpsw->cpts) {
872 if (cpts_register(cpsw->cpts))
873 dev_err(priv->dev, "error registering cpts device\n");
874 else
875 writel(0x10, &cpsw->wr_regs->misc_en);
876 }
877
878 napi_enable(&cpsw->napi_rx);
879 napi_enable(&cpsw->napi_tx);
880
881 if (cpsw->tx_irq_disabled) {
882 cpsw->tx_irq_disabled = false;
883 enable_irq(cpsw->irqs_table[1]);
884 }
885
886 if (cpsw->rx_irq_disabled) {
887 cpsw->rx_irq_disabled = false;
888 enable_irq(cpsw->irqs_table[0]);
889 }
890 }
891
892 cpsw_restore(priv);
893
894 /* Enable Interrupt pacing if configured */
895 if (cpsw->coal_intvl != 0) {
896 struct ethtool_coalesce coal;
897
898 coal.rx_coalesce_usecs = cpsw->coal_intvl;
899 cpsw_set_coalesce(ndev, &coal, NULL, NULL);
900 }
901
902 cpdma_ctlr_start(cpsw->dma);
903 cpsw_intr_enable(cpsw);
904 cpsw->usage_count++;
905
906 return 0;
907
908 err_cleanup:
909 cpsw_ndo_stop(ndev);
910
911 pm_cleanup:
912 pm_runtime_put_sync(cpsw->dev);
913 return ret;
914 }
915
916 static netdev_tx_t cpsw_ndo_start_xmit(struct sk_buff *skb,
917 struct net_device *ndev)
918 {
919 struct cpsw_priv *priv = netdev_priv(ndev);
920 struct cpsw_common *cpsw = priv->cpsw;
921 struct cpts *cpts = cpsw->cpts;
922 struct netdev_queue *txq;
923 struct cpdma_chan *txch;
924 int ret, q_idx;
925
926 if (skb_put_padto(skb, READ_ONCE(priv->tx_packet_min))) {
927 cpsw_err(priv, tx_err, "packet pad failed\n");
928 ndev->stats.tx_dropped++;
929 return NET_XMIT_DROP;
930 }
931
932 if (skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP &&
933 priv->tx_ts_enabled && cpts_can_timestamp(cpts, skb))
934 skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS;
935
936 q_idx = skb_get_queue_mapping(skb);
937 if (q_idx >= cpsw->tx_ch_num)
938 q_idx = q_idx % cpsw->tx_ch_num;
939
940 txch = cpsw->txv[q_idx].ch;
941 txq = netdev_get_tx_queue(ndev, q_idx);
942 skb_tx_timestamp(skb);
943 ret = cpdma_chan_submit(txch, skb, skb->data, skb->len,
944 priv->emac_port);
945 if (unlikely(ret != 0)) {
946 cpsw_err(priv, tx_err, "desc submit failed\n");
947 goto fail;
948 }
949
950 /* If there is no more tx desc left free then we need to
951 * tell the kernel to stop sending us tx frames.
952 */
953 if (unlikely(!cpdma_check_free_tx_desc(txch))) {
954 netif_tx_stop_queue(txq);
955
956 /* Barrier, so that stop_queue visible to other cpus */
957 smp_mb__after_atomic();
958
959 if (cpdma_check_free_tx_desc(txch))
960 netif_tx_wake_queue(txq);
961 }
962
963 return NETDEV_TX_OK;
964 fail:
965 ndev->stats.tx_dropped++;
966 netif_tx_stop_queue(txq);
967
968 /* Barrier, so that stop_queue visible to other cpus */
969 smp_mb__after_atomic();
970
971 if (cpdma_check_free_tx_desc(txch))
972 netif_tx_wake_queue(txq);
973
974 return NETDEV_TX_BUSY;
975 }
976
977 static int cpsw_ndo_set_mac_address(struct net_device *ndev, void *p)
978 {
979 struct sockaddr *addr = (struct sockaddr *)p;
980 struct cpsw_priv *priv = netdev_priv(ndev);
981 struct cpsw_common *cpsw = priv->cpsw;
982 int ret, slave_no;
983 int flags = 0;
984 u16 vid = 0;
985
986 slave_no = cpsw_slave_index(cpsw, priv);
987 if (!is_valid_ether_addr(addr->sa_data))
988 return -EADDRNOTAVAIL;
989
990 ret = pm_runtime_resume_and_get(cpsw->dev);
991 if (ret < 0)
992 return ret;
993
994 vid = cpsw->slaves[slave_no].port_vlan;
995 flags = ALE_VLAN | ALE_SECURE;
996
997 cpsw_ale_del_ucast(cpsw->ale, priv->mac_addr, HOST_PORT_NUM,
998 flags, vid);
999 cpsw_ale_add_ucast(cpsw->ale, addr->sa_data, HOST_PORT_NUM,
1000 flags, vid);
1001
1002 ether_addr_copy(priv->mac_addr, addr->sa_data);
1003 eth_hw_addr_set(ndev, priv->mac_addr);
1004 cpsw_set_slave_mac(&cpsw->slaves[slave_no], priv);
1005
1006 pm_runtime_put(cpsw->dev);
1007
1008 return 0;
1009 }
1010
1011 static int cpsw_ndo_vlan_rx_kill_vid(struct net_device *ndev,
1012 __be16 proto, u16 vid)
1013 {
1014 struct cpsw_priv *priv = netdev_priv(ndev);
1015 struct cpsw_common *cpsw = priv->cpsw;
1016 int ret;
1017 int i;
1018
1019 if (cpsw_is_switch_en(cpsw)) {
1020 dev_dbg(cpsw->dev, "ndo del vlan is called in switch mode\n");
1021 return 0;
1022 }
1023
1024 if (vid == cpsw->data.default_vlan)
1025 return 0;
1026
1027 ret = pm_runtime_resume_and_get(cpsw->dev);
1028 if (ret < 0)
1029 return ret;
1030
1031 /* reset the return code as pm_runtime_get_sync() can return
1032 * non zero values as well.
1033 */
1034 ret = 0;
1035 for (i = 0; i < cpsw->data.slaves; i++) {
1036 if (cpsw->slaves[i].ndev &&
1037 vid == cpsw->slaves[i].port_vlan) {
1038 ret = -EINVAL;
1039 goto err;
1040 }
1041 }
1042
1043 dev_dbg(priv->dev, "removing vlanid %d from vlan filter\n", vid);
1044 ret = cpsw_ale_del_vlan(cpsw->ale, vid, 0);
1045 if (ret)
1046 dev_err(priv->dev, "cpsw_ale_del_vlan() failed: ret %d\n", ret);
1047 ret = cpsw_ale_del_ucast(cpsw->ale, priv->mac_addr,
1048 HOST_PORT_NUM, ALE_VLAN, vid);
1049 if (ret)
1050 dev_err(priv->dev, "cpsw_ale_del_ucast() failed: ret %d\n",
1051 ret);
1052 ret = cpsw_ale_del_mcast(cpsw->ale, priv->ndev->broadcast,
1053 0, ALE_VLAN, vid);
1054 if (ret)
1055 dev_err(priv->dev, "cpsw_ale_del_mcast failed. ret %d\n",
1056 ret);
1057 cpsw_ale_flush_multicast(cpsw->ale, ALE_PORT_HOST, vid);
1058 ret = 0;
1059 err:
1060 pm_runtime_put(cpsw->dev);
1061 return ret;
1062 }
1063
1064 static int cpsw_ndo_get_phys_port_name(struct net_device *ndev, char *name,
1065 size_t len)
1066 {
1067 struct cpsw_priv *priv = netdev_priv(ndev);
1068 int err;
1069
1070 err = snprintf(name, len, "p%d", priv->emac_port);
1071
1072 if (err >= len)
1073 return -EINVAL;
1074
1075 return 0;
1076 }
1077
1078 #ifdef CONFIG_NET_POLL_CONTROLLER
1079 static void cpsw_ndo_poll_controller(struct net_device *ndev)
1080 {
1081 struct cpsw_common *cpsw = ndev_to_cpsw(ndev);
1082
1083 cpsw_intr_disable(cpsw);
1084 cpsw_rx_interrupt(cpsw->irqs_table[0], cpsw);
1085 cpsw_tx_interrupt(cpsw->irqs_table[1], cpsw);
1086 cpsw_intr_enable(cpsw);
1087 }
1088 #endif
1089
1090 static int cpsw_ndo_xdp_xmit(struct net_device *ndev, int n,
1091 struct xdp_frame **frames, u32 flags)
1092 {
1093 struct cpsw_priv *priv = netdev_priv(ndev);
1094 struct xdp_frame *xdpf;
1095 int i, nxmit = 0;
1096
1097 if (unlikely(flags & ~XDP_XMIT_FLAGS_MASK))
1098 return -EINVAL;
1099
1100 for (i = 0; i < n; i++) {
1101 xdpf = frames[i];
1102 if (xdpf->len < READ_ONCE(priv->tx_packet_min))
1103 break;
1104
1105 if (cpsw_xdp_tx_frame(priv, xdpf, NULL, priv->emac_port))
1106 break;
1107 nxmit++;
1108 }
1109
1110 return nxmit;
1111 }
1112
1113 static int cpsw_get_port_parent_id(struct net_device *ndev,
1114 struct netdev_phys_item_id *ppid)
1115 {
1116 struct cpsw_common *cpsw = ndev_to_cpsw(ndev);
1117
1118 ppid->id_len = sizeof(cpsw->base_mac);
1119 memcpy(&ppid->id, &cpsw->base_mac, ppid->id_len);
1120
1121 return 0;
1122 }
1123
1124 static const struct net_device_ops cpsw_netdev_ops = {
1125 .ndo_open = cpsw_ndo_open,
1126 .ndo_stop = cpsw_ndo_stop,
1127 .ndo_start_xmit = cpsw_ndo_start_xmit,
1128 .ndo_set_mac_address = cpsw_ndo_set_mac_address,
1129 .ndo_eth_ioctl = cpsw_ndo_ioctl,
1130 .ndo_validate_addr = eth_validate_addr,
1131 .ndo_tx_timeout = cpsw_ndo_tx_timeout,
1132 .ndo_set_rx_mode = cpsw_ndo_set_rx_mode,
1133 .ndo_set_tx_maxrate = cpsw_ndo_set_tx_maxrate,
1134 #ifdef CONFIG_NET_POLL_CONTROLLER
1135 .ndo_poll_controller = cpsw_ndo_poll_controller,
1136 #endif
1137 .ndo_vlan_rx_add_vid = cpsw_ndo_vlan_rx_add_vid,
1138 .ndo_vlan_rx_kill_vid = cpsw_ndo_vlan_rx_kill_vid,
1139 .ndo_setup_tc = cpsw_ndo_setup_tc,
1140 .ndo_get_phys_port_name = cpsw_ndo_get_phys_port_name,
1141 .ndo_bpf = cpsw_ndo_bpf,
1142 .ndo_xdp_xmit = cpsw_ndo_xdp_xmit,
1143 .ndo_get_port_parent_id = cpsw_get_port_parent_id,
1144 };
1145
1146 static void cpsw_get_drvinfo(struct net_device *ndev,
1147 struct ethtool_drvinfo *info)
1148 {
1149 struct cpsw_common *cpsw = ndev_to_cpsw(ndev);
1150 struct platform_device *pdev;
1151
1152 pdev = to_platform_device(cpsw->dev);
1153 strscpy(info->driver, "cpsw-switch", sizeof(info->driver));
1154 strscpy(info->version, "2.0", sizeof(info->version));
1155 strscpy(info->bus_info, pdev->name, sizeof(info->bus_info));
1156 }
1157
1158 static int cpsw_set_pauseparam(struct net_device *ndev,
1159 struct ethtool_pauseparam *pause)
1160 {
1161 struct cpsw_common *cpsw = ndev_to_cpsw(ndev);
1162 struct cpsw_priv *priv = netdev_priv(ndev);
1163 int slave_no;
1164
1165 slave_no = cpsw_slave_index(cpsw, priv);
1166 if (!cpsw->slaves[slave_no].phy)
1167 return -EINVAL;
1168
1169 if (!phy_validate_pause(cpsw->slaves[slave_no].phy, pause))
1170 return -EINVAL;
1171
1172 priv->rx_pause = pause->rx_pause ? true : false;
1173 priv->tx_pause = pause->tx_pause ? true : false;
1174
1175 phy_set_asym_pause(cpsw->slaves[slave_no].phy,
1176 priv->rx_pause, priv->tx_pause);
1177
1178 return 0;
1179 }
1180
1181 static int cpsw_set_channels(struct net_device *ndev,
1182 struct ethtool_channels *chs)
1183 {
1184 return cpsw_set_channels_common(ndev, chs, cpsw_rx_handler);
1185 }
1186
1187 static const struct ethtool_ops cpsw_ethtool_ops = {
1188 .supported_coalesce_params = ETHTOOL_COALESCE_RX_USECS,
1189 .get_drvinfo = cpsw_get_drvinfo,
1190 .get_msglevel = cpsw_get_msglevel,
1191 .set_msglevel = cpsw_set_msglevel,
1192 .get_link = ethtool_op_get_link,
1193 .get_ts_info = cpsw_get_ts_info,
1194 .get_coalesce = cpsw_get_coalesce,
1195 .set_coalesce = cpsw_set_coalesce,
1196 .get_sset_count = cpsw_get_sset_count,
1197 .get_strings = cpsw_get_strings,
1198 .get_ethtool_stats = cpsw_get_ethtool_stats,
1199 .get_pauseparam = cpsw_get_pauseparam,
1200 .set_pauseparam = cpsw_set_pauseparam,
1201 .get_wol = cpsw_get_wol,
1202 .set_wol = cpsw_set_wol,
1203 .get_regs_len = cpsw_get_regs_len,
1204 .get_regs = cpsw_get_regs,
1205 .begin = cpsw_ethtool_op_begin,
1206 .complete = cpsw_ethtool_op_complete,
1207 .get_channels = cpsw_get_channels,
1208 .set_channels = cpsw_set_channels,
1209 .get_link_ksettings = cpsw_get_link_ksettings,
1210 .set_link_ksettings = cpsw_set_link_ksettings,
1211 .get_eee = cpsw_get_eee,
1212 .set_eee = cpsw_set_eee,
1213 .nway_reset = cpsw_nway_reset,
1214 .get_ringparam = cpsw_get_ringparam,
1215 .set_ringparam = cpsw_set_ringparam,
1216 };
1217
1218 static int cpsw_probe_dt(struct cpsw_common *cpsw)
1219 {
1220 struct device_node *node = cpsw->dev->of_node, *tmp_node, *port_np;
1221 struct cpsw_platform_data *data = &cpsw->data;
1222 struct device *dev = cpsw->dev;
1223 int ret;
1224 u32 prop;
1225
1226 if (!node)
1227 return -EINVAL;
1228
1229 tmp_node = of_get_child_by_name(node, "ethernet-ports");
1230 if (!tmp_node)
1231 return -ENOENT;
1232 data->slaves = of_get_child_count(tmp_node);
1233 if (data->slaves != CPSW_SLAVE_PORTS_NUM) {
1234 of_node_put(tmp_node);
1235 return -ENOENT;
1236 }
1237
1238 data->active_slave = 0;
1239 data->channels = CPSW_MAX_QUEUES;
1240 data->dual_emac = true;
1241 data->bd_ram_size = CPSW_BD_RAM_SIZE;
1242 data->mac_control = 0;
1243
1244 data->slave_data = devm_kcalloc(dev, CPSW_SLAVE_PORTS_NUM,
1245 sizeof(struct cpsw_slave_data),
1246 GFP_KERNEL);
1247 if (!data->slave_data) {
1248 of_node_put(tmp_node);
1249 return -ENOMEM;
1250 }
1251
1252 /* Populate all the child nodes here...
1253 */
1254 ret = devm_of_platform_populate(dev);
1255 /* We do not want to force this, as in some cases may not have child */
1256 if (ret)
1257 dev_warn(dev, "Doesn't have any child node\n");
1258
1259 for_each_child_of_node(tmp_node, port_np) {
1260 struct cpsw_slave_data *slave_data;
1261 u32 port_id;
1262
1263 ret = of_property_read_u32(port_np, "reg", &port_id);
1264 if (ret < 0) {
1265 dev_err(dev, "%pOF error reading port_id %d\n",
1266 port_np, ret);
1267 goto err_node_put;
1268 }
1269
1270 if (!port_id || port_id > CPSW_SLAVE_PORTS_NUM) {
1271 dev_err(dev, "%pOF has invalid port_id %u\n",
1272 port_np, port_id);
1273 ret = -EINVAL;
1274 goto err_node_put;
1275 }
1276
1277 slave_data = &data->slave_data[port_id - 1];
1278
1279 slave_data->disabled = !of_device_is_available(port_np);
1280 if (slave_data->disabled)
1281 continue;
1282
1283 slave_data->slave_node = port_np;
1284 slave_data->ifphy = devm_of_phy_get(dev, port_np, NULL);
1285 if (IS_ERR(slave_data->ifphy)) {
1286 ret = PTR_ERR(slave_data->ifphy);
1287 dev_err(dev, "%pOF: Error retrieving port phy: %d\n",
1288 port_np, ret);
1289 goto err_node_put;
1290 }
1291
1292 if (of_phy_is_fixed_link(port_np)) {
1293 ret = of_phy_register_fixed_link(port_np);
1294 if (ret) {
1295 dev_err_probe(dev, ret, "%pOF failed to register fixed-link phy\n",
1296 port_np);
1297 goto err_node_put;
1298 }
1299 slave_data->phy_node = of_node_get(port_np);
1300 } else {
1301 slave_data->phy_node =
1302 of_parse_phandle(port_np, "phy-handle", 0);
1303 }
1304
1305 if (!slave_data->phy_node) {
1306 dev_err(dev, "%pOF no phy found\n", port_np);
1307 ret = -ENODEV;
1308 goto err_node_put;
1309 }
1310
1311 ret = of_get_phy_mode(port_np, &slave_data->phy_if);
1312 if (ret) {
1313 dev_err(dev, "%pOF read phy-mode err %d\n",
1314 port_np, ret);
1315 goto err_node_put;
1316 }
1317
1318 ret = of_get_mac_address(port_np, slave_data->mac_addr);
1319 if (ret) {
1320 ret = ti_cm_get_macid(dev, port_id - 1,
1321 slave_data->mac_addr);
1322 if (ret)
1323 goto err_node_put;
1324 }
1325
1326 if (of_property_read_u32(port_np, "ti,dual-emac-pvid",
1327 &prop)) {
1328 dev_err(dev, "%pOF Missing dual_emac_res_vlan in DT.\n",
1329 port_np);
1330 slave_data->dual_emac_res_vlan = port_id;
1331 dev_err(dev, "%pOF Using %d as Reserved VLAN\n",
1332 port_np, slave_data->dual_emac_res_vlan);
1333 } else {
1334 slave_data->dual_emac_res_vlan = prop;
1335 }
1336 }
1337
1338 of_node_put(tmp_node);
1339 return 0;
1340
1341 err_node_put:
1342 of_node_put(port_np);
1343 of_node_put(tmp_node);
1344 return ret;
1345 }
1346
1347 static void cpsw_remove_dt(struct cpsw_common *cpsw)
1348 {
1349 struct cpsw_platform_data *data = &cpsw->data;
1350 int i = 0;
1351
1352 for (i = 0; i < cpsw->data.slaves; i++) {
1353 struct cpsw_slave_data *slave_data = &data->slave_data[i];
1354 struct device_node *port_np = slave_data->phy_node;
1355
1356 if (port_np) {
1357 if (of_phy_is_fixed_link(port_np))
1358 of_phy_deregister_fixed_link(port_np);
1359
1360 of_node_put(port_np);
1361 }
1362 }
1363 }
1364
1365 static int cpsw_create_ports(struct cpsw_common *cpsw)
1366 {
1367 struct cpsw_platform_data *data = &cpsw->data;
1368 struct net_device *ndev, *napi_ndev = NULL;
1369 struct device *dev = cpsw->dev;
1370 struct cpsw_priv *priv;
1371 int ret = 0, i = 0;
1372
1373 for (i = 0; i < cpsw->data.slaves; i++) {
1374 struct cpsw_slave_data *slave_data = &data->slave_data[i];
1375
1376 if (slave_data->disabled)
1377 continue;
1378
1379 ndev = devm_alloc_etherdev_mqs(dev, sizeof(struct cpsw_priv),
1380 CPSW_MAX_QUEUES,
1381 CPSW_MAX_QUEUES);
1382 if (!ndev) {
1383 dev_err(dev, "error allocating net_device\n");
1384 return -ENOMEM;
1385 }
1386
1387 priv = netdev_priv(ndev);
1388 priv->cpsw = cpsw;
1389 priv->ndev = ndev;
1390 priv->dev = dev;
1391 priv->msg_enable = netif_msg_init(debug_level, CPSW_DEBUG);
1392 priv->emac_port = i + 1;
1393 priv->tx_packet_min = CPSW_MIN_PACKET_SIZE;
1394
1395 if (is_valid_ether_addr(slave_data->mac_addr)) {
1396 ether_addr_copy(priv->mac_addr, slave_data->mac_addr);
1397 dev_info(cpsw->dev, "Detected MACID = %pM\n",
1398 priv->mac_addr);
1399 } else {
1400 eth_random_addr(slave_data->mac_addr);
1401 dev_info(cpsw->dev, "Random MACID = %pM\n",
1402 priv->mac_addr);
1403 }
1404 eth_hw_addr_set(ndev, slave_data->mac_addr);
1405 ether_addr_copy(priv->mac_addr, slave_data->mac_addr);
1406
1407 cpsw->slaves[i].ndev = ndev;
1408
1409 ndev->features |= NETIF_F_HW_VLAN_CTAG_FILTER |
1410 NETIF_F_HW_VLAN_CTAG_RX | NETIF_F_HW_TC;
1411 ndev->netns_local = true;
1412
1413 ndev->xdp_features = NETDEV_XDP_ACT_BASIC |
1414 NETDEV_XDP_ACT_REDIRECT |
1415 NETDEV_XDP_ACT_NDO_XMIT;
1416
1417 ndev->netdev_ops = &cpsw_netdev_ops;
1418 ndev->ethtool_ops = &cpsw_ethtool_ops;
1419 SET_NETDEV_DEV(ndev, dev);
1420
1421 if (!napi_ndev) {
1422 /* CPSW Host port CPDMA interface is shared between
1423 * ports and there is only one TX and one RX IRQs
1424 * available for all possible TX and RX channels
1425 * accordingly.
1426 */
1427 netif_napi_add(ndev, &cpsw->napi_rx,
1428 cpsw->quirk_irq ? cpsw_rx_poll : cpsw_rx_mq_poll);
1429 netif_napi_add_tx(ndev, &cpsw->napi_tx,
1430 cpsw->quirk_irq ?
1431 cpsw_tx_poll : cpsw_tx_mq_poll);
1432 }
1433
1434 napi_ndev = ndev;
1435 }
1436
1437 return ret;
1438 }
1439
1440 static void cpsw_unregister_ports(struct cpsw_common *cpsw)
1441 {
1442 int i = 0;
1443
1444 for (i = 0; i < cpsw->data.slaves; i++) {
1445 if (!cpsw->slaves[i].ndev)
1446 continue;
1447
1448 unregister_netdev(cpsw->slaves[i].ndev);
1449 }
1450 }
1451
1452 static int cpsw_register_ports(struct cpsw_common *cpsw)
1453 {
1454 int ret = 0, i = 0;
1455
1456 for (i = 0; i < cpsw->data.slaves; i++) {
1457 if (!cpsw->slaves[i].ndev)
1458 continue;
1459
1460 /* register the network device */
1461 ret = register_netdev(cpsw->slaves[i].ndev);
1462 if (ret) {
1463 dev_err(cpsw->dev,
1464 "cpsw: err registering net device%d\n", i);
1465 cpsw->slaves[i].ndev = NULL;
1466 break;
1467 }
1468 }
1469
1470 if (ret)
1471 cpsw_unregister_ports(cpsw);
1472 return ret;
1473 }
1474
1475 bool cpsw_port_dev_check(const struct net_device *ndev)
1476 {
1477 if (ndev->netdev_ops == &cpsw_netdev_ops) {
1478 struct cpsw_common *cpsw = ndev_to_cpsw(ndev);
1479
1480 return !cpsw->data.dual_emac;
1481 }
1482
1483 return false;
1484 }
1485
1486 static void cpsw_port_offload_fwd_mark_update(struct cpsw_common *cpsw)
1487 {
1488 int set_val = 0;
1489 int i;
1490
1491 if (!cpsw->ale_bypass &&
1492 (cpsw->br_members == (ALE_PORT_1 | ALE_PORT_2)))
1493 set_val = 1;
1494
1495 dev_dbg(cpsw->dev, "set offload_fwd_mark %d\n", set_val);
1496
1497 for (i = 0; i < cpsw->data.slaves; i++) {
1498 struct net_device *sl_ndev = cpsw->slaves[i].ndev;
1499 struct cpsw_priv *priv = netdev_priv(sl_ndev);
1500
1501 priv->offload_fwd_mark = set_val;
1502 }
1503 }
1504
1505 static int cpsw_netdevice_port_link(struct net_device *ndev,
1506 struct net_device *br_ndev,
1507 struct netlink_ext_ack *extack)
1508 {
1509 struct cpsw_priv *priv = netdev_priv(ndev);
1510 struct cpsw_common *cpsw = priv->cpsw;
1511 int err;
1512
1513 if (!cpsw->br_members) {
1514 cpsw->hw_bridge_dev = br_ndev;
1515 } else {
1516 /* This is adding the port to a second bridge, this is
1517 * unsupported
1518 */
1519 if (cpsw->hw_bridge_dev != br_ndev)
1520 return -EOPNOTSUPP;
1521 }
1522
1523 err = switchdev_bridge_port_offload(ndev, ndev, NULL, NULL, NULL,
1524 false, extack);
1525 if (err)
1526 return err;
1527
1528 cpsw->br_members |= BIT(priv->emac_port);
1529
1530 cpsw_port_offload_fwd_mark_update(cpsw);
1531
1532 return NOTIFY_DONE;
1533 }
1534
1535 static void cpsw_netdevice_port_unlink(struct net_device *ndev)
1536 {
1537 struct cpsw_priv *priv = netdev_priv(ndev);
1538 struct cpsw_common *cpsw = priv->cpsw;
1539
1540 switchdev_bridge_port_unoffload(ndev, NULL, NULL, NULL);
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 netlink_ext_ack *extack = netdev_notifier_info_to_extack(ptr);
1555 struct net_device *ndev = netdev_notifier_info_to_dev(ptr);
1556 struct netdev_notifier_changeupper_info *info;
1557 int ret = NOTIFY_DONE;
1558
1559 if (!cpsw_port_dev_check(ndev))
1560 return NOTIFY_DONE;
1561
1562 switch (event) {
1563 case NETDEV_CHANGEUPPER:
1564 info = ptr;
1565
1566 if (netif_is_bridge_master(info->upper_dev)) {
1567 if (info->linking)
1568 ret = cpsw_netdevice_port_link(ndev,
1569 info->upper_dev,
1570 extack);
1571 else
1572 cpsw_netdevice_port_unlink(ndev);
1573 }
1574 break;
1575 default:
1576 return NOTIFY_DONE;
1577 }
1578
1579 return notifier_from_errno(ret);
1580 }
1581
1582 static struct notifier_block cpsw_netdevice_nb __read_mostly = {
1583 .notifier_call = cpsw_netdevice_event,
1584 };
1585
1586 static int cpsw_register_notifiers(struct cpsw_common *cpsw)
1587 {
1588 int ret = 0;
1589
1590 ret = register_netdevice_notifier(&cpsw_netdevice_nb);
1591 if (ret) {
1592 dev_err(cpsw->dev, "can't register netdevice notifier\n");
1593 return ret;
1594 }
1595
1596 ret = cpsw_switchdev_register_notifiers(cpsw);
1597 if (ret)
1598 unregister_netdevice_notifier(&cpsw_netdevice_nb);
1599
1600 return ret;
1601 }
1602
1603 static void cpsw_unregister_notifiers(struct cpsw_common *cpsw)
1604 {
1605 cpsw_switchdev_unregister_notifiers(cpsw);
1606 unregister_netdevice_notifier(&cpsw_netdevice_nb);
1607 }
1608
1609 static const struct devlink_ops cpsw_devlink_ops = {
1610 };
1611
1612 static int cpsw_dl_switch_mode_get(struct devlink *dl, u32 id,
1613 struct devlink_param_gset_ctx *ctx)
1614 {
1615 struct cpsw_devlink *dl_priv = devlink_priv(dl);
1616 struct cpsw_common *cpsw = dl_priv->cpsw;
1617
1618 dev_dbg(cpsw->dev, "%s id:%u\n", __func__, id);
1619
1620 if (id != CPSW_DL_PARAM_SWITCH_MODE)
1621 return -EOPNOTSUPP;
1622
1623 ctx->val.vbool = !cpsw->data.dual_emac;
1624
1625 return 0;
1626 }
1627
1628 static int cpsw_dl_switch_mode_set(struct devlink *dl, u32 id,
1629 struct devlink_param_gset_ctx *ctx,
1630 struct netlink_ext_ack *extack)
1631 {
1632 struct cpsw_devlink *dl_priv = devlink_priv(dl);
1633 struct cpsw_common *cpsw = dl_priv->cpsw;
1634 int vlan = cpsw->data.default_vlan;
1635 bool switch_en = ctx->val.vbool;
1636 bool if_running = false;
1637 int i;
1638
1639 dev_dbg(cpsw->dev, "%s id:%u\n", __func__, id);
1640
1641 if (id != CPSW_DL_PARAM_SWITCH_MODE)
1642 return -EOPNOTSUPP;
1643
1644 if (switch_en == !cpsw->data.dual_emac)
1645 return 0;
1646
1647 if (!switch_en && cpsw->br_members) {
1648 dev_err(cpsw->dev, "Remove ports from BR before disabling switch mode\n");
1649 return -EINVAL;
1650 }
1651
1652 rtnl_lock();
1653
1654 for (i = 0; i < cpsw->data.slaves; i++) {
1655 struct cpsw_slave *slave = &cpsw->slaves[i];
1656 struct net_device *sl_ndev = slave->ndev;
1657
1658 if (!sl_ndev || !netif_running(sl_ndev))
1659 continue;
1660
1661 if_running = true;
1662 }
1663
1664 if (!if_running) {
1665 /* all ndevs are down */
1666 cpsw->data.dual_emac = !switch_en;
1667 for (i = 0; i < cpsw->data.slaves; i++) {
1668 struct cpsw_slave *slave = &cpsw->slaves[i];
1669 struct net_device *sl_ndev = slave->ndev;
1670
1671 if (!sl_ndev)
1672 continue;
1673
1674 if (switch_en)
1675 vlan = cpsw->data.default_vlan;
1676 else
1677 vlan = slave->data->dual_emac_res_vlan;
1678 slave->port_vlan = vlan;
1679 }
1680 goto exit;
1681 }
1682
1683 if (switch_en) {
1684 dev_info(cpsw->dev, "Enable switch mode\n");
1685
1686 /* enable bypass - no forwarding; all traffic goes to Host */
1687 cpsw_ale_control_set(cpsw->ale, 0, ALE_BYPASS, 1);
1688
1689 /* clean up ALE table */
1690 cpsw_ale_control_set(cpsw->ale, 0, ALE_CLEAR, 1);
1691 cpsw_ale_control_get(cpsw->ale, 0, ALE_AGEOUT);
1692
1693 cpsw_init_host_port_switch(cpsw);
1694
1695 for (i = 0; i < cpsw->data.slaves; i++) {
1696 struct cpsw_slave *slave = &cpsw->slaves[i];
1697 struct net_device *sl_ndev = slave->ndev;
1698 struct cpsw_priv *priv;
1699
1700 if (!sl_ndev)
1701 continue;
1702
1703 priv = netdev_priv(sl_ndev);
1704 slave->port_vlan = vlan;
1705 WRITE_ONCE(priv->tx_packet_min, CPSW_MIN_PACKET_SIZE_VLAN);
1706 if (netif_running(sl_ndev))
1707 cpsw_port_add_switch_def_ale_entries(priv,
1708 slave);
1709 }
1710
1711 cpsw_ale_control_set(cpsw->ale, 0, ALE_BYPASS, 0);
1712 cpsw->data.dual_emac = false;
1713 } else {
1714 dev_info(cpsw->dev, "Disable switch mode\n");
1715
1716 /* enable bypass - no forwarding; all traffic goes to Host */
1717 cpsw_ale_control_set(cpsw->ale, 0, ALE_BYPASS, 1);
1718
1719 cpsw_ale_control_set(cpsw->ale, 0, ALE_CLEAR, 1);
1720 cpsw_ale_control_get(cpsw->ale, 0, ALE_AGEOUT);
1721
1722 cpsw_init_host_port_dual_mac(cpsw);
1723
1724 for (i = 0; i < cpsw->data.slaves; i++) {
1725 struct cpsw_slave *slave = &cpsw->slaves[i];
1726 struct net_device *sl_ndev = slave->ndev;
1727 struct cpsw_priv *priv;
1728
1729 if (!sl_ndev)
1730 continue;
1731
1732 priv = netdev_priv(slave->ndev);
1733 slave->port_vlan = slave->data->dual_emac_res_vlan;
1734 WRITE_ONCE(priv->tx_packet_min, CPSW_MIN_PACKET_SIZE);
1735 cpsw_port_add_dual_emac_def_ale_entries(priv, slave);
1736 }
1737
1738 cpsw_ale_control_set(cpsw->ale, 0, ALE_BYPASS, 0);
1739 cpsw->data.dual_emac = true;
1740 }
1741 exit:
1742 rtnl_unlock();
1743
1744 return 0;
1745 }
1746
1747 static int cpsw_dl_ale_ctrl_get(struct devlink *dl, u32 id,
1748 struct devlink_param_gset_ctx *ctx)
1749 {
1750 struct cpsw_devlink *dl_priv = devlink_priv(dl);
1751 struct cpsw_common *cpsw = dl_priv->cpsw;
1752
1753 dev_dbg(cpsw->dev, "%s id:%u\n", __func__, id);
1754
1755 switch (id) {
1756 case CPSW_DL_PARAM_ALE_BYPASS:
1757 ctx->val.vbool = cpsw_ale_control_get(cpsw->ale, 0, ALE_BYPASS);
1758 break;
1759 default:
1760 return -EOPNOTSUPP;
1761 }
1762
1763 return 0;
1764 }
1765
1766 static int cpsw_dl_ale_ctrl_set(struct devlink *dl, u32 id,
1767 struct devlink_param_gset_ctx *ctx,
1768 struct netlink_ext_ack *extack)
1769 {
1770 struct cpsw_devlink *dl_priv = devlink_priv(dl);
1771 struct cpsw_common *cpsw = dl_priv->cpsw;
1772 int ret = -EOPNOTSUPP;
1773
1774 dev_dbg(cpsw->dev, "%s id:%u\n", __func__, id);
1775
1776 switch (id) {
1777 case CPSW_DL_PARAM_ALE_BYPASS:
1778 ret = cpsw_ale_control_set(cpsw->ale, 0, ALE_BYPASS,
1779 ctx->val.vbool);
1780 if (!ret) {
1781 cpsw->ale_bypass = ctx->val.vbool;
1782 cpsw_port_offload_fwd_mark_update(cpsw);
1783 }
1784 break;
1785 default:
1786 return -EOPNOTSUPP;
1787 }
1788
1789 return 0;
1790 }
1791
1792 static const struct devlink_param cpsw_devlink_params[] = {
1793 DEVLINK_PARAM_DRIVER(CPSW_DL_PARAM_SWITCH_MODE,
1794 "switch_mode", DEVLINK_PARAM_TYPE_BOOL,
1795 BIT(DEVLINK_PARAM_CMODE_RUNTIME),
1796 cpsw_dl_switch_mode_get, cpsw_dl_switch_mode_set,
1797 NULL),
1798 DEVLINK_PARAM_DRIVER(CPSW_DL_PARAM_ALE_BYPASS,
1799 "ale_bypass", DEVLINK_PARAM_TYPE_BOOL,
1800 BIT(DEVLINK_PARAM_CMODE_RUNTIME),
1801 cpsw_dl_ale_ctrl_get, cpsw_dl_ale_ctrl_set, NULL),
1802 };
1803
1804 static int cpsw_register_devlink(struct cpsw_common *cpsw)
1805 {
1806 struct device *dev = cpsw->dev;
1807 struct cpsw_devlink *dl_priv;
1808 int ret = 0;
1809
1810 cpsw->devlink = devlink_alloc(&cpsw_devlink_ops, sizeof(*dl_priv), dev);
1811 if (!cpsw->devlink)
1812 return -ENOMEM;
1813
1814 dl_priv = devlink_priv(cpsw->devlink);
1815 dl_priv->cpsw = cpsw;
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_register(cpsw->devlink);
1825 return ret;
1826
1827 dl_unreg:
1828 devlink_free(cpsw->devlink);
1829 return ret;
1830 }
1831
1832 static void cpsw_unregister_devlink(struct cpsw_common *cpsw)
1833 {
1834 devlink_unregister(cpsw->devlink);
1835 devlink_params_unregister(cpsw->devlink, cpsw_devlink_params,
1836 ARRAY_SIZE(cpsw_devlink_params));
1837 devlink_free(cpsw->devlink);
1838 }
1839
1840 static const struct of_device_id cpsw_of_mtable[] = {
1841 { .compatible = "ti,cpsw-switch"},
1842 { .compatible = "ti,am335x-cpsw-switch"},
1843 { .compatible = "ti,am4372-cpsw-switch"},
1844 { .compatible = "ti,dra7-cpsw-switch"},
1845 { /* sentinel */ },
1846 };
1847 MODULE_DEVICE_TABLE(of, cpsw_of_mtable);
1848
1849 static const struct soc_device_attribute cpsw_soc_devices[] = {
1850 { .family = "AM33xx", .revision = "ES1.0"},
1851 { /* sentinel */ }
1852 };
1853
1854 static int cpsw_probe(struct platform_device *pdev)
1855 {
1856 const struct soc_device_attribute *soc;
1857 struct device *dev = &pdev->dev;
1858 struct cpsw_common *cpsw;
1859 struct resource *ss_res;
1860 struct gpio_descs *mode;
1861 void __iomem *ss_regs;
1862 int ret = 0, ch;
1863 struct clk *clk;
1864 int irq;
1865
1866 cpsw = devm_kzalloc(dev, sizeof(struct cpsw_common), GFP_KERNEL);
1867 if (!cpsw)
1868 return -ENOMEM;
1869
1870 cpsw_slave_index = cpsw_slave_index_priv;
1871
1872 cpsw->dev = dev;
1873
1874 cpsw->slaves = devm_kcalloc(dev,
1875 CPSW_SLAVE_PORTS_NUM,
1876 sizeof(struct cpsw_slave),
1877 GFP_KERNEL);
1878 if (!cpsw->slaves)
1879 return -ENOMEM;
1880
1881 mode = devm_gpiod_get_array_optional(dev, "mode", GPIOD_OUT_LOW);
1882 if (IS_ERR(mode)) {
1883 ret = PTR_ERR(mode);
1884 dev_err(dev, "gpio request failed, ret %d\n", ret);
1885 return ret;
1886 }
1887
1888 clk = devm_clk_get(dev, "fck");
1889 if (IS_ERR(clk)) {
1890 ret = PTR_ERR(clk);
1891 dev_err(dev, "fck is not found %d\n", ret);
1892 return ret;
1893 }
1894 cpsw->bus_freq_mhz = clk_get_rate(clk) / 1000000;
1895
1896 ss_regs = devm_platform_get_and_ioremap_resource(pdev, 0, &ss_res);
1897 if (IS_ERR(ss_regs)) {
1898 ret = PTR_ERR(ss_regs);
1899 return ret;
1900 }
1901 cpsw->regs = ss_regs;
1902
1903 irq = platform_get_irq_byname(pdev, "rx");
1904 if (irq < 0)
1905 return irq;
1906 cpsw->irqs_table[0] = irq;
1907
1908 irq = platform_get_irq_byname(pdev, "tx");
1909 if (irq < 0)
1910 return irq;
1911 cpsw->irqs_table[1] = irq;
1912
1913 irq = platform_get_irq_byname(pdev, "misc");
1914 if (irq <= 0)
1915 return irq;
1916 cpsw->misc_irq = irq;
1917
1918 platform_set_drvdata(pdev, cpsw);
1919 /* This may be required here for child devices. */
1920 pm_runtime_enable(dev);
1921
1922 /* Need to enable clocks with runtime PM api to access module
1923 * registers
1924 */
1925 ret = pm_runtime_resume_and_get(dev);
1926 if (ret < 0) {
1927 pm_runtime_disable(dev);
1928 return ret;
1929 }
1930
1931 ret = cpsw_probe_dt(cpsw);
1932 if (ret)
1933 goto clean_dt_ret;
1934
1935 soc = soc_device_match(cpsw_soc_devices);
1936 if (soc)
1937 cpsw->quirk_irq = true;
1938
1939 cpsw->rx_packet_max = rx_packet_max;
1940 cpsw->descs_pool_size = descs_pool_size;
1941 eth_random_addr(cpsw->base_mac);
1942
1943 ret = cpsw_init_common(cpsw, ss_regs, ale_ageout,
1944 (u32 __force)ss_res->start + CPSW2_BD_OFFSET,
1945 descs_pool_size);
1946 if (ret)
1947 goto clean_dt_ret;
1948
1949 cpsw->wr_regs = cpsw->version == CPSW_VERSION_1 ?
1950 ss_regs + CPSW1_WR_OFFSET :
1951 ss_regs + CPSW2_WR_OFFSET;
1952
1953 ch = cpsw->quirk_irq ? 0 : 7;
1954 cpsw->txv[0].ch = cpdma_chan_create(cpsw->dma, ch, cpsw_tx_handler, 0);
1955 if (IS_ERR(cpsw->txv[0].ch)) {
1956 dev_err(dev, "error initializing tx dma channel\n");
1957 ret = PTR_ERR(cpsw->txv[0].ch);
1958 goto clean_cpts;
1959 }
1960
1961 cpsw->rxv[0].ch = cpdma_chan_create(cpsw->dma, 0, cpsw_rx_handler, 1);
1962 if (IS_ERR(cpsw->rxv[0].ch)) {
1963 dev_err(dev, "error initializing rx dma channel\n");
1964 ret = PTR_ERR(cpsw->rxv[0].ch);
1965 goto clean_cpts;
1966 }
1967 cpsw_split_res(cpsw);
1968
1969 /* setup netdevs */
1970 ret = cpsw_create_ports(cpsw);
1971 if (ret)
1972 goto clean_unregister_netdev;
1973
1974 /* Grab RX and TX IRQs. Note that we also have RX_THRESHOLD and
1975 * MISC IRQs which are always kept disabled with this driver so
1976 * we will not request them.
1977 *
1978 * If anyone wants to implement support for those, make sure to
1979 * first request and append them to irqs_table array.
1980 */
1981
1982 ret = devm_request_irq(dev, cpsw->irqs_table[0], cpsw_rx_interrupt,
1983 0, dev_name(dev), cpsw);
1984 if (ret < 0) {
1985 dev_err(dev, "error attaching irq (%d)\n", ret);
1986 goto clean_unregister_netdev;
1987 }
1988
1989 ret = devm_request_irq(dev, cpsw->irqs_table[1], cpsw_tx_interrupt,
1990 0, dev_name(dev), cpsw);
1991 if (ret < 0) {
1992 dev_err(dev, "error attaching irq (%d)\n", ret);
1993 goto clean_unregister_netdev;
1994 }
1995
1996 if (!cpsw->cpts)
1997 goto skip_cpts;
1998
1999 ret = devm_request_irq(dev, cpsw->misc_irq, cpsw_misc_interrupt,
2000 0, dev_name(&pdev->dev), cpsw);
2001 if (ret < 0) {
2002 dev_err(dev, "error attaching misc irq (%d)\n", ret);
2003 goto clean_unregister_netdev;
2004 }
2005
2006 /* Enable misc CPTS evnt_pend IRQ */
2007 cpts_set_irqpoll(cpsw->cpts, false);
2008
2009 skip_cpts:
2010 ret = cpsw_register_notifiers(cpsw);
2011 if (ret)
2012 goto clean_unregister_netdev;
2013
2014 ret = cpsw_register_devlink(cpsw);
2015 if (ret)
2016 goto clean_unregister_notifiers;
2017
2018 ret = cpsw_register_ports(cpsw);
2019 if (ret)
2020 goto clean_unregister_notifiers;
2021
2022 dev_notice(dev, "initialized (regs %pa, pool size %d) hw_ver:%08X %d.%d (%d)\n",
2023 &ss_res->start, descs_pool_size,
2024 cpsw->version, CPSW_MAJOR_VERSION(cpsw->version),
2025 CPSW_MINOR_VERSION(cpsw->version),
2026 CPSW_RTL_VERSION(cpsw->version));
2027
2028 pm_runtime_put(dev);
2029
2030 return 0;
2031
2032 clean_unregister_notifiers:
2033 cpsw_unregister_notifiers(cpsw);
2034 clean_unregister_netdev:
2035 cpsw_unregister_ports(cpsw);
2036 clean_cpts:
2037 cpts_release(cpsw->cpts);
2038 cpdma_ctlr_destroy(cpsw->dma);
2039 clean_dt_ret:
2040 cpsw_remove_dt(cpsw);
2041 pm_runtime_put_sync(dev);
2042 pm_runtime_disable(dev);
2043 return ret;
2044 }
2045
2046 static void cpsw_remove(struct platform_device *pdev)
2047 {
2048 struct cpsw_common *cpsw = platform_get_drvdata(pdev);
2049 int ret;
2050
2051 ret = pm_runtime_resume_and_get(&pdev->dev);
2052 if (ret < 0) {
2053 /* Note, if this error path is taken, we're leaking some
2054 * resources.
2055 */
2056 dev_err(&pdev->dev, "Failed to resume device (%pe)\n",
2057 ERR_PTR(ret));
2058 return;
2059 }
2060
2061 cpsw_unregister_notifiers(cpsw);
2062 cpsw_unregister_devlink(cpsw);
2063 cpsw_unregister_ports(cpsw);
2064
2065 cpts_release(cpsw->cpts);
2066 cpdma_ctlr_destroy(cpsw->dma);
2067 cpsw_remove_dt(cpsw);
2068 pm_runtime_put_sync(&pdev->dev);
2069 pm_runtime_disable(&pdev->dev);
2070 }
2071
2072 static int __maybe_unused cpsw_suspend(struct device *dev)
2073 {
2074 struct cpsw_common *cpsw = dev_get_drvdata(dev);
2075 int i;
2076
2077 rtnl_lock();
2078
2079 for (i = 0; i < cpsw->data.slaves; i++) {
2080 struct net_device *ndev = cpsw->slaves[i].ndev;
2081
2082 if (!(ndev && netif_running(ndev)))
2083 continue;
2084
2085 cpsw_ndo_stop(ndev);
2086 }
2087
2088 rtnl_unlock();
2089
2090 /* Select sleep pin state */
2091 pinctrl_pm_select_sleep_state(dev);
2092
2093 return 0;
2094 }
2095
2096 static int __maybe_unused cpsw_resume(struct device *dev)
2097 {
2098 struct cpsw_common *cpsw = dev_get_drvdata(dev);
2099 int i;
2100
2101 /* Select default pin state */
2102 pinctrl_pm_select_default_state(dev);
2103
2104 /* shut up ASSERT_RTNL() warning in netif_set_real_num_tx/rx_queues */
2105 rtnl_lock();
2106
2107 for (i = 0; i < cpsw->data.slaves; i++) {
2108 struct net_device *ndev = cpsw->slaves[i].ndev;
2109
2110 if (!(ndev && netif_running(ndev)))
2111 continue;
2112
2113 cpsw_ndo_open(ndev);
2114 }
2115
2116 rtnl_unlock();
2117
2118 return 0;
2119 }
2120
2121 static SIMPLE_DEV_PM_OPS(cpsw_pm_ops, cpsw_suspend, cpsw_resume);
2122
2123 static struct platform_driver cpsw_driver = {
2124 .driver = {
2125 .name = "cpsw-switch",
2126 .pm = &cpsw_pm_ops,
2127 .of_match_table = cpsw_of_mtable,
2128 },
2129 .probe = cpsw_probe,
2130 .remove = cpsw_remove,
2131 };
2132
2133 module_platform_driver(cpsw_driver);
2134
2135 MODULE_LICENSE("GPL");
2136 MODULE_DESCRIPTION("TI CPSW switchdev Ethernet driver");
Kernel DRM miscellaneous fixes and cross-tree changes