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

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