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