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accel/ivpu: Move recovery work to system_unbound_wq
[drm/drm-misc.git] / drivers / net / ethernet / ti / cpsw.c
blob4ef8cf6ea135a67ca0c3c18d1b5378feb3735c4a
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_platform.h>
31 #include <linux/if_vlan.h>
32 #include <linux/kmemleak.h>
33 #include <linux/sys_soc.h>
34 #include <net/page_pool/helpers.h>
35 #include <linux/bpf.h>
36 #include <linux/bpf_trace.h>
37
38 #include <linux/pinctrl/consumer.h>
39 #include <net/pkt_cls.h>
40
41 #include "cpsw.h"
42 #include "cpsw_ale.h"
43 #include "cpsw_priv.h"
44 #include "cpsw_sl.h"
45 #include "cpts.h"
46 #include "davinci_cpdma.h"
47
48 #include <net/pkt_sched.h>
49
50 static int debug_level;
51 module_param(debug_level, int, 0);
52 MODULE_PARM_DESC(debug_level, "cpsw debug level (NETIF_MSG bits)");
53
54 static int ale_ageout = 10;
55 module_param(ale_ageout, int, 0);
56 MODULE_PARM_DESC(ale_ageout, "cpsw ale ageout interval (seconds)");
57
58 static int rx_packet_max = CPSW_MAX_PACKET_SIZE;
59 module_param(rx_packet_max, int, 0);
60 MODULE_PARM_DESC(rx_packet_max, "maximum receive packet size (bytes)");
61
62 static int descs_pool_size = CPSW_CPDMA_DESCS_POOL_SIZE_DEFAULT;
63 module_param(descs_pool_size, int, 0444);
64 MODULE_PARM_DESC(descs_pool_size, "Number of CPDMA CPPI descriptors in pool");
65
66 #define for_each_slave(priv, func, arg...) \
67 do { \
68 struct cpsw_slave *slave; \
69 struct cpsw_common *cpsw = (priv)->cpsw; \
70 int n; \
71 if (cpsw->data.dual_emac) \
72 (func)((cpsw)->slaves + priv->emac_port, ##arg);\
73 else \
74 for (n = cpsw->data.slaves, \
75 slave = cpsw->slaves; \
76 n; n--) \
77 (func)(slave++, ##arg); \
78 } while (0)
79
80 static int cpsw_slave_index_priv(struct cpsw_common *cpsw,
81 struct cpsw_priv *priv)
82 {
83 return cpsw->data.dual_emac ? priv->emac_port : cpsw->data.active_slave;
84 }
85
86 static int cpsw_get_slave_port(u32 slave_num)
87 {
88 return slave_num + 1;
89 }
90
91 static int cpsw_ndo_vlan_rx_add_vid(struct net_device *ndev,
92 __be16 proto, u16 vid);
93
94 static void cpsw_set_promiscious(struct net_device *ndev, bool enable)
95 {
96 struct cpsw_common *cpsw = ndev_to_cpsw(ndev);
97 struct cpsw_ale *ale = cpsw->ale;
98 int i;
99
100 if (cpsw->data.dual_emac) {
101 bool flag = false;
102
103 /* Enabling promiscuous mode for one interface will be
104 * common for both the interface as the interface shares
105 * the same hardware resource.
106 */
107 for (i = 0; i < cpsw->data.slaves; i++)
108 if (cpsw->slaves[i].ndev->flags & IFF_PROMISC)
109 flag = true;
110
111 if (!enable && flag) {
112 enable = true;
113 dev_err(&ndev->dev, "promiscuity not disabled as the other interface is still in promiscuity mode\n");
114 }
115
116 if (enable) {
117 /* Enable Bypass */
118 cpsw_ale_control_set(ale, 0, ALE_BYPASS, 1);
119
120 dev_dbg(&ndev->dev, "promiscuity enabled\n");
121 } else {
122 /* Disable Bypass */
123 cpsw_ale_control_set(ale, 0, ALE_BYPASS, 0);
124 dev_dbg(&ndev->dev, "promiscuity disabled\n");
125 }
126 } else {
127 if (enable) {
128 unsigned long timeout = jiffies + HZ;
129
130 /* Disable Learn for all ports (host is port 0 and slaves are port 1 and up */
131 for (i = 0; i <= cpsw->data.slaves; i++) {
132 cpsw_ale_control_set(ale, i,
133 ALE_PORT_NOLEARN, 1);
134 cpsw_ale_control_set(ale, i,
135 ALE_PORT_NO_SA_UPDATE, 1);
136 }
137
138 /* Clear All Untouched entries */
139 cpsw_ale_control_set(ale, 0, ALE_AGEOUT, 1);
140 do {
141 cpu_relax();
142 if (cpsw_ale_control_get(ale, 0, ALE_AGEOUT))
143 break;
144 } while (time_after(timeout, jiffies));
145 cpsw_ale_control_set(ale, 0, ALE_AGEOUT, 1);
146
147 /* Clear all mcast from ALE */
148 cpsw_ale_flush_multicast(ale, ALE_ALL_PORTS, -1);
149 __hw_addr_ref_unsync_dev(&ndev->mc, ndev, NULL);
150
151 /* Flood All Unicast Packets to Host port */
152 cpsw_ale_control_set(ale, 0, ALE_P0_UNI_FLOOD, 1);
153 dev_dbg(&ndev->dev, "promiscuity enabled\n");
154 } else {
155 /* Don't Flood All Unicast Packets to Host port */
156 cpsw_ale_control_set(ale, 0, ALE_P0_UNI_FLOOD, 0);
157
158 /* Enable Learn for all ports (host is port 0 and slaves are port 1 and up */
159 for (i = 0; i <= cpsw->data.slaves; i++) {
160 cpsw_ale_control_set(ale, i,
161 ALE_PORT_NOLEARN, 0);
162 cpsw_ale_control_set(ale, i,
163 ALE_PORT_NO_SA_UPDATE, 0);
164 }
165 dev_dbg(&ndev->dev, "promiscuity disabled\n");
166 }
167 }
168 }
169
170 /**
171 * cpsw_set_mc - adds multicast entry to the table if it's not added or deletes
172 * if it's not deleted
173 * @ndev: device to sync
174 * @addr: address to be added or deleted
175 * @vid: vlan id, if vid < 0 set/unset address for real device
176 * @add: add address if the flag is set or remove otherwise
177 */
178 static int cpsw_set_mc(struct net_device *ndev, const u8 *addr,
179 int vid, int add)
180 {
181 struct cpsw_priv *priv = netdev_priv(ndev);
182 struct cpsw_common *cpsw = priv->cpsw;
183 int mask, flags, ret;
184
185 if (vid < 0) {
186 if (cpsw->data.dual_emac)
187 vid = cpsw->slaves[priv->emac_port].port_vlan;
188 else
189 vid = 0;
190 }
191
192 mask = cpsw->data.dual_emac ? ALE_PORT_HOST : ALE_ALL_PORTS;
193 flags = vid ? ALE_VLAN : 0;
194
195 if (add)
196 ret = cpsw_ale_add_mcast(cpsw->ale, addr, mask, flags, vid, 0);
197 else
198 ret = cpsw_ale_del_mcast(cpsw->ale, addr, 0, flags, vid);
199
200 return ret;
201 }
202
203 static int cpsw_update_vlan_mc(struct net_device *vdev, int vid, void *ctx)
204 {
205 struct addr_sync_ctx *sync_ctx = ctx;
206 struct netdev_hw_addr *ha;
207 int found = 0, ret = 0;
208
209 if (!vdev || !(vdev->flags & IFF_UP))
210 return 0;
211
212 /* vlan address is relevant if its sync_cnt != 0 */
213 netdev_for_each_mc_addr(ha, vdev) {
214 if (ether_addr_equal(ha->addr, sync_ctx->addr)) {
215 found = ha->sync_cnt;
216 break;
217 }
218 }
219
220 if (found)
221 sync_ctx->consumed++;
222
223 if (sync_ctx->flush) {
224 if (!found)
225 cpsw_set_mc(sync_ctx->ndev, sync_ctx->addr, vid, 0);
226 return 0;
227 }
228
229 if (found)
230 ret = cpsw_set_mc(sync_ctx->ndev, sync_ctx->addr, vid, 1);
231
232 return ret;
233 }
234
235 static int cpsw_add_mc_addr(struct net_device *ndev, const u8 *addr, int num)
236 {
237 struct addr_sync_ctx sync_ctx;
238 int ret;
239
240 sync_ctx.consumed = 0;
241 sync_ctx.addr = addr;
242 sync_ctx.ndev = ndev;
243 sync_ctx.flush = 0;
244
245 ret = vlan_for_each(ndev, cpsw_update_vlan_mc, &sync_ctx);
246 if (sync_ctx.consumed < num && !ret)
247 ret = cpsw_set_mc(ndev, addr, -1, 1);
248
249 return ret;
250 }
251
252 static int cpsw_del_mc_addr(struct net_device *ndev, const u8 *addr, int num)
253 {
254 struct addr_sync_ctx sync_ctx;
255
256 sync_ctx.consumed = 0;
257 sync_ctx.addr = addr;
258 sync_ctx.ndev = ndev;
259 sync_ctx.flush = 1;
260
261 vlan_for_each(ndev, cpsw_update_vlan_mc, &sync_ctx);
262 if (sync_ctx.consumed == num)
263 cpsw_set_mc(ndev, addr, -1, 0);
264
265 return 0;
266 }
267
268 static int cpsw_purge_vlan_mc(struct net_device *vdev, int vid, void *ctx)
269 {
270 struct addr_sync_ctx *sync_ctx = ctx;
271 struct netdev_hw_addr *ha;
272 int found = 0;
273
274 if (!vdev || !(vdev->flags & IFF_UP))
275 return 0;
276
277 /* vlan address is relevant if its sync_cnt != 0 */
278 netdev_for_each_mc_addr(ha, vdev) {
279 if (ether_addr_equal(ha->addr, sync_ctx->addr)) {
280 found = ha->sync_cnt;
281 break;
282 }
283 }
284
285 if (!found)
286 return 0;
287
288 sync_ctx->consumed++;
289 cpsw_set_mc(sync_ctx->ndev, sync_ctx->addr, vid, 0);
290 return 0;
291 }
292
293 static int cpsw_purge_all_mc(struct net_device *ndev, const u8 *addr, int num)
294 {
295 struct addr_sync_ctx sync_ctx;
296
297 sync_ctx.addr = addr;
298 sync_ctx.ndev = ndev;
299 sync_ctx.consumed = 0;
300
301 vlan_for_each(ndev, cpsw_purge_vlan_mc, &sync_ctx);
302 if (sync_ctx.consumed < num)
303 cpsw_set_mc(ndev, addr, -1, 0);
304
305 return 0;
306 }
307
308 static void cpsw_ndo_set_rx_mode(struct net_device *ndev)
309 {
310 struct cpsw_priv *priv = netdev_priv(ndev);
311 struct cpsw_common *cpsw = priv->cpsw;
312 int slave_port = -1;
313
314 if (cpsw->data.dual_emac)
315 slave_port = priv->emac_port + 1;
316
317 if (ndev->flags & IFF_PROMISC) {
318 /* Enable promiscuous mode */
319 cpsw_set_promiscious(ndev, true);
320 cpsw_ale_set_allmulti(cpsw->ale, IFF_ALLMULTI, slave_port);
321 return;
322 } else {
323 /* Disable promiscuous mode */
324 cpsw_set_promiscious(ndev, false);
325 }
326
327 /* Restore allmulti on vlans if necessary */
328 cpsw_ale_set_allmulti(cpsw->ale,
329 ndev->flags & IFF_ALLMULTI, slave_port);
330
331 /* add/remove mcast address either for real netdev or for vlan */
332 __hw_addr_ref_sync_dev(&ndev->mc, ndev, cpsw_add_mc_addr,
333 cpsw_del_mc_addr);
334 }
335
336 static unsigned int cpsw_rxbuf_total_len(unsigned int len)
337 {
338 len += CPSW_HEADROOM_NA;
339 len += SKB_DATA_ALIGN(sizeof(struct skb_shared_info));
340
341 return SKB_DATA_ALIGN(len);
342 }
343
344 static void cpsw_rx_handler(void *token, int len, int status)
345 {
346 struct page *new_page, *page = token;
347 void *pa = page_address(page);
348 struct cpsw_meta_xdp *xmeta = pa + CPSW_XMETA_OFFSET;
349 struct cpsw_common *cpsw = ndev_to_cpsw(xmeta->ndev);
350 int pkt_size = cpsw->rx_packet_max;
351 int ret = 0, port, ch = xmeta->ch;
352 int headroom = CPSW_HEADROOM_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
440 requeue:
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
454 static 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
519 static 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
540 static 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
562 static 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 phy->mac_managed_pm = true;
635
636 slave->phy = phy;
637
638 phy_attached_info(slave->phy);
639
640 phy_start(slave->phy);
641
642 /* Configure GMII_SEL register */
643 if (!IS_ERR(slave->data->ifphy))
644 phy_set_mode_ext(slave->data->ifphy, PHY_MODE_ETHERNET,
645 slave->data->phy_if);
646 else
647 cpsw_phy_sel(cpsw->dev, slave->phy->interface,
648 slave->slave_num);
649 }
650
651 static inline void cpsw_add_default_vlan(struct cpsw_priv *priv)
652 {
653 struct cpsw_common *cpsw = priv->cpsw;
654 const int vlan = cpsw->data.default_vlan;
655 u32 reg;
656 int i;
657 int unreg_mcast_mask;
658
659 reg = (cpsw->version == CPSW_VERSION_1) ? CPSW1_PORT_VLAN :
660 CPSW2_PORT_VLAN;
661
662 writel(vlan, &cpsw->host_port_regs->port_vlan);
663
664 for (i = 0; i < cpsw->data.slaves; i++)
665 slave_write(cpsw->slaves + i, vlan, reg);
666
667 if (priv->ndev->flags & IFF_ALLMULTI)
668 unreg_mcast_mask = ALE_ALL_PORTS;
669 else
670 unreg_mcast_mask = ALE_PORT_1 | ALE_PORT_2;
671
672 cpsw_ale_add_vlan(cpsw->ale, vlan, ALE_ALL_PORTS,
673 ALE_ALL_PORTS, ALE_ALL_PORTS,
674 unreg_mcast_mask);
675 }
676
677 static void cpsw_init_host_port(struct cpsw_priv *priv)
678 {
679 u32 fifo_mode;
680 u32 control_reg;
681 struct cpsw_common *cpsw = priv->cpsw;
682
683 /* soft reset the controller and initialize ale */
684 soft_reset("cpsw", &cpsw->regs->soft_reset);
685 cpsw_ale_start(cpsw->ale);
686
687 /* switch to vlan unaware mode */
688 cpsw_ale_control_set(cpsw->ale, HOST_PORT_NUM, ALE_VLAN_AWARE,
689 CPSW_ALE_VLAN_AWARE);
690 control_reg = readl(&cpsw->regs->control);
691 control_reg |= CPSW_VLAN_AWARE | CPSW_RX_VLAN_ENCAP;
692 writel(control_reg, &cpsw->regs->control);
693 fifo_mode = (cpsw->data.dual_emac) ? CPSW_FIFO_DUAL_MAC_MODE :
694 CPSW_FIFO_NORMAL_MODE;
695 writel(fifo_mode, &cpsw->host_port_regs->tx_in_ctl);
696
697 /* setup host port priority mapping */
698 writel_relaxed(CPDMA_TX_PRIORITY_MAP,
699 &cpsw->host_port_regs->cpdma_tx_pri_map);
700 writel_relaxed(0, &cpsw->host_port_regs->cpdma_rx_chan_map);
701
702 cpsw_ale_control_set(cpsw->ale, HOST_PORT_NUM,
703 ALE_PORT_STATE, ALE_PORT_STATE_FORWARD);
704
705 if (!cpsw->data.dual_emac) {
706 cpsw_ale_add_ucast(cpsw->ale, priv->mac_addr, HOST_PORT_NUM,
707 0, 0);
708 cpsw_ale_add_mcast(cpsw->ale, priv->ndev->broadcast,
709 ALE_PORT_HOST, 0, 0, ALE_MCAST_FWD_2);
710 }
711 }
712
713 static void cpsw_slave_stop(struct cpsw_slave *slave, struct cpsw_common *cpsw)
714 {
715 u32 slave_port;
716
717 slave_port = cpsw_get_slave_port(slave->slave_num);
718
719 if (!slave->phy)
720 return;
721 phy_stop(slave->phy);
722 phy_disconnect(slave->phy);
723 slave->phy = NULL;
724 cpsw_ale_control_set(cpsw->ale, slave_port,
725 ALE_PORT_STATE, ALE_PORT_STATE_DISABLE);
726 cpsw_sl_reset(slave->mac_sl, 100);
727 cpsw_sl_ctl_reset(slave->mac_sl);
728 }
729
730 static int cpsw_restore_vlans(struct net_device *vdev, int vid, void *arg)
731 {
732 struct cpsw_priv *priv = arg;
733
734 if (!vdev)
735 return 0;
736
737 cpsw_ndo_vlan_rx_add_vid(priv->ndev, 0, vid);
738 return 0;
739 }
740
741 /* restore resources after port reset */
742 static void cpsw_restore(struct cpsw_priv *priv)
743 {
744 /* restore vlan configurations */
745 vlan_for_each(priv->ndev, cpsw_restore_vlans, priv);
746
747 /* restore MQPRIO offload */
748 for_each_slave(priv, cpsw_mqprio_resume, priv);
749
750 /* restore CBS offload */
751 for_each_slave(priv, cpsw_cbs_resume, priv);
752 }
753
754 static int cpsw_ndo_open(struct net_device *ndev)
755 {
756 struct cpsw_priv *priv = netdev_priv(ndev);
757 struct cpsw_common *cpsw = priv->cpsw;
758 int ret;
759 u32 reg;
760
761 ret = pm_runtime_resume_and_get(cpsw->dev);
762 if (ret < 0)
763 return ret;
764
765 netif_carrier_off(ndev);
766
767 /* Notify the stack of the actual queue counts. */
768 ret = netif_set_real_num_tx_queues(ndev, cpsw->tx_ch_num);
769 if (ret) {
770 dev_err(priv->dev, "cannot set real number of tx queues\n");
771 goto err_cleanup;
772 }
773
774 ret = netif_set_real_num_rx_queues(ndev, cpsw->rx_ch_num);
775 if (ret) {
776 dev_err(priv->dev, "cannot set real number of rx queues\n");
777 goto err_cleanup;
778 }
779
780 reg = cpsw->version;
781
782 dev_info(priv->dev, "initializing cpsw version %d.%d (%d)\n",
783 CPSW_MAJOR_VERSION(reg), CPSW_MINOR_VERSION(reg),
784 CPSW_RTL_VERSION(reg));
785
786 /* Initialize host and slave ports */
787 if (!cpsw->usage_count)
788 cpsw_init_host_port(priv);
789 for_each_slave(priv, cpsw_slave_open, priv);
790
791 /* Add default VLAN */
792 if (!cpsw->data.dual_emac)
793 cpsw_add_default_vlan(priv);
794 else
795 cpsw_ale_add_vlan(cpsw->ale, cpsw->data.default_vlan,
796 ALE_ALL_PORTS, ALE_ALL_PORTS, 0, 0);
797
798 /* initialize shared resources for every ndev */
799 if (!cpsw->usage_count) {
800 /* disable priority elevation */
801 writel_relaxed(0, &cpsw->regs->ptype);
802
803 /* enable statistics collection only on all ports */
804 writel_relaxed(0x7, &cpsw->regs->stat_port_en);
805
806 /* Enable internal fifo flow control */
807 writel(0x7, &cpsw->regs->flow_control);
808
809 napi_enable(&cpsw->napi_rx);
810 napi_enable(&cpsw->napi_tx);
811
812 if (cpsw->tx_irq_disabled) {
813 cpsw->tx_irq_disabled = false;
814 enable_irq(cpsw->irqs_table[1]);
815 }
816
817 if (cpsw->rx_irq_disabled) {
818 cpsw->rx_irq_disabled = false;
819 enable_irq(cpsw->irqs_table[0]);
820 }
821
822 /* create rxqs for both infs in dual mac as they use same pool
823 * and must be destroyed together when no users.
824 */
825 ret = cpsw_create_xdp_rxqs(cpsw);
826 if (ret < 0)
827 goto err_cleanup;
828
829 ret = cpsw_fill_rx_channels(priv);
830 if (ret < 0)
831 goto err_cleanup;
832
833 if (cpsw->cpts) {
834 if (cpts_register(cpsw->cpts))
835 dev_err(priv->dev, "error registering cpts device\n");
836 else
837 writel(0x10, &cpsw->wr_regs->misc_en);
838 }
839 }
840
841 cpsw_restore(priv);
842
843 /* Enable Interrupt pacing if configured */
844 if (cpsw->coal_intvl != 0) {
845 struct ethtool_coalesce coal;
846
847 coal.rx_coalesce_usecs = cpsw->coal_intvl;
848 cpsw_set_coalesce(ndev, &coal, NULL, NULL);
849 }
850
851 cpdma_ctlr_start(cpsw->dma);
852 cpsw_intr_enable(cpsw);
853 cpsw->usage_count++;
854
855 return 0;
856
857 err_cleanup:
858 if (!cpsw->usage_count) {
859 napi_disable(&cpsw->napi_rx);
860 napi_disable(&cpsw->napi_tx);
861 cpdma_ctlr_stop(cpsw->dma);
862 cpsw_destroy_xdp_rxqs(cpsw);
863 }
864
865 for_each_slave(priv, cpsw_slave_stop, cpsw);
866 pm_runtime_put_sync(cpsw->dev);
867 netif_carrier_off(priv->ndev);
868 return ret;
869 }
870
871 static int cpsw_ndo_stop(struct net_device *ndev)
872 {
873 struct cpsw_priv *priv = netdev_priv(ndev);
874 struct cpsw_common *cpsw = priv->cpsw;
875
876 cpsw_info(priv, ifdown, "shutting down cpsw device\n");
877 __hw_addr_ref_unsync_dev(&ndev->mc, ndev, cpsw_purge_all_mc);
878 netif_tx_stop_all_queues(priv->ndev);
879 netif_carrier_off(priv->ndev);
880
881 if (cpsw->usage_count <= 1) {
882 napi_disable(&cpsw->napi_rx);
883 napi_disable(&cpsw->napi_tx);
884 cpts_unregister(cpsw->cpts);
885 cpsw_intr_disable(cpsw);
886 cpdma_ctlr_stop(cpsw->dma);
887 cpsw_ale_stop(cpsw->ale);
888 cpsw_destroy_xdp_rxqs(cpsw);
889 }
890 for_each_slave(priv, cpsw_slave_stop, cpsw);
891
892 if (cpsw_need_resplit(cpsw))
893 cpsw_split_res(cpsw);
894
895 cpsw->usage_count--;
896 pm_runtime_put_sync(cpsw->dev);
897 return 0;
898 }
899
900 static netdev_tx_t cpsw_ndo_start_xmit(struct sk_buff *skb,
901 struct net_device *ndev)
902 {
903 struct cpsw_priv *priv = netdev_priv(ndev);
904 struct cpsw_common *cpsw = priv->cpsw;
905 struct cpts *cpts = cpsw->cpts;
906 struct netdev_queue *txq;
907 struct cpdma_chan *txch;
908 int ret, q_idx;
909
910 if (skb_put_padto(skb, CPSW_MIN_PACKET_SIZE)) {
911 cpsw_err(priv, tx_err, "packet pad failed\n");
912 ndev->stats.tx_dropped++;
913 return NET_XMIT_DROP;
914 }
915
916 if (skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP &&
917 priv->tx_ts_enabled && cpts_can_timestamp(cpts, skb))
918 skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS;
919
920 q_idx = skb_get_queue_mapping(skb);
921 if (q_idx >= cpsw->tx_ch_num)
922 q_idx = q_idx % cpsw->tx_ch_num;
923
924 txch = cpsw->txv[q_idx].ch;
925 txq = netdev_get_tx_queue(ndev, q_idx);
926 skb_tx_timestamp(skb);
927 ret = cpdma_chan_submit(txch, skb, skb->data, skb->len,
928 priv->emac_port + cpsw->data.dual_emac);
929 if (unlikely(ret != 0)) {
930 cpsw_err(priv, tx_err, "desc submit failed\n");
931 goto fail;
932 }
933
934 /* If there is no more tx desc left free then we need to
935 * tell the kernel to stop sending us tx frames.
936 */
937 if (unlikely(!cpdma_check_free_tx_desc(txch))) {
938 netif_tx_stop_queue(txq);
939
940 /* Barrier, so that stop_queue visible to other cpus */
941 smp_mb__after_atomic();
942
943 if (cpdma_check_free_tx_desc(txch))
944 netif_tx_wake_queue(txq);
945 }
946
947 return NETDEV_TX_OK;
948 fail:
949 ndev->stats.tx_dropped++;
950 netif_tx_stop_queue(txq);
951
952 /* Barrier, so that stop_queue visible to other cpus */
953 smp_mb__after_atomic();
954
955 if (cpdma_check_free_tx_desc(txch))
956 netif_tx_wake_queue(txq);
957
958 return NETDEV_TX_BUSY;
959 }
960
961 static int cpsw_ndo_set_mac_address(struct net_device *ndev, void *p)
962 {
963 struct cpsw_priv *priv = netdev_priv(ndev);
964 struct sockaddr *addr = (struct sockaddr *)p;
965 struct cpsw_common *cpsw = priv->cpsw;
966 int flags = 0;
967 u16 vid = 0;
968 int ret;
969
970 if (!is_valid_ether_addr(addr->sa_data))
971 return -EADDRNOTAVAIL;
972
973 ret = pm_runtime_resume_and_get(cpsw->dev);
974 if (ret < 0)
975 return ret;
976
977 if (cpsw->data.dual_emac) {
978 vid = cpsw->slaves[priv->emac_port].port_vlan;
979 flags = ALE_VLAN;
980 }
981
982 cpsw_ale_del_ucast(cpsw->ale, priv->mac_addr, HOST_PORT_NUM,
983 flags, vid);
984 cpsw_ale_add_ucast(cpsw->ale, addr->sa_data, HOST_PORT_NUM,
985 flags, vid);
986
987 memcpy(priv->mac_addr, addr->sa_data, ETH_ALEN);
988 eth_hw_addr_set(ndev, priv->mac_addr);
989 for_each_slave(priv, cpsw_set_slave_mac, priv);
990
991 pm_runtime_put(cpsw->dev);
992
993 return 0;
994 }
995
996 static inline int cpsw_add_vlan_ale_entry(struct cpsw_priv *priv,
997 unsigned short vid)
998 {
999 int ret;
1000 int unreg_mcast_mask = 0;
1001 int mcast_mask;
1002 u32 port_mask;
1003 struct cpsw_common *cpsw = priv->cpsw;
1004
1005 if (cpsw->data.dual_emac) {
1006 port_mask = (1 << (priv->emac_port + 1)) | ALE_PORT_HOST;
1007
1008 mcast_mask = ALE_PORT_HOST;
1009 if (priv->ndev->flags & IFF_ALLMULTI)
1010 unreg_mcast_mask = mcast_mask;
1011 } else {
1012 port_mask = ALE_ALL_PORTS;
1013 mcast_mask = port_mask;
1014
1015 if (priv->ndev->flags & IFF_ALLMULTI)
1016 unreg_mcast_mask = ALE_ALL_PORTS;
1017 else
1018 unreg_mcast_mask = ALE_PORT_1 | ALE_PORT_2;
1019 }
1020
1021 ret = cpsw_ale_add_vlan(cpsw->ale, vid, port_mask, 0, port_mask,
1022 unreg_mcast_mask);
1023 if (ret != 0)
1024 return ret;
1025
1026 ret = cpsw_ale_add_ucast(cpsw->ale, priv->mac_addr,
1027 HOST_PORT_NUM, ALE_VLAN, vid);
1028 if (ret != 0)
1029 goto clean_vid;
1030
1031 ret = cpsw_ale_add_mcast(cpsw->ale, priv->ndev->broadcast,
1032 mcast_mask, ALE_VLAN, vid, 0);
1033 if (ret != 0)
1034 goto clean_vlan_ucast;
1035 return 0;
1036
1037 clean_vlan_ucast:
1038 cpsw_ale_del_ucast(cpsw->ale, priv->mac_addr,
1039 HOST_PORT_NUM, ALE_VLAN, vid);
1040 clean_vid:
1041 cpsw_ale_del_vlan(cpsw->ale, vid, 0);
1042 return ret;
1043 }
1044
1045 static int cpsw_ndo_vlan_rx_add_vid(struct net_device *ndev,
1046 __be16 proto, u16 vid)
1047 {
1048 struct cpsw_priv *priv = netdev_priv(ndev);
1049 struct cpsw_common *cpsw = priv->cpsw;
1050 int ret;
1051
1052 if (vid == cpsw->data.default_vlan)
1053 return 0;
1054
1055 ret = pm_runtime_resume_and_get(cpsw->dev);
1056 if (ret < 0)
1057 return ret;
1058
1059 if (cpsw->data.dual_emac) {
1060 /* In dual EMAC, reserved VLAN id should not be used for
1061 * creating VLAN interfaces as this can break the dual
1062 * EMAC port separation
1063 */
1064 int i;
1065
1066 for (i = 0; i < cpsw->data.slaves; i++) {
1067 if (vid == cpsw->slaves[i].port_vlan) {
1068 ret = -EINVAL;
1069 goto err;
1070 }
1071 }
1072 }
1073
1074 dev_info(priv->dev, "Adding vlanid %d to vlan filter\n", vid);
1075 ret = cpsw_add_vlan_ale_entry(priv, vid);
1076 err:
1077 pm_runtime_put(cpsw->dev);
1078 return ret;
1079 }
1080
1081 static int cpsw_ndo_vlan_rx_kill_vid(struct net_device *ndev,
1082 __be16 proto, u16 vid)
1083 {
1084 struct cpsw_priv *priv = netdev_priv(ndev);
1085 struct cpsw_common *cpsw = priv->cpsw;
1086 int ret;
1087
1088 if (vid == cpsw->data.default_vlan)
1089 return 0;
1090
1091 ret = pm_runtime_resume_and_get(cpsw->dev);
1092 if (ret < 0)
1093 return ret;
1094
1095 if (cpsw->data.dual_emac) {
1096 int i;
1097
1098 for (i = 0; i < cpsw->data.slaves; i++) {
1099 if (vid == cpsw->slaves[i].port_vlan)
1100 goto err;
1101 }
1102 }
1103
1104 dev_info(priv->dev, "removing vlanid %d from vlan filter\n", vid);
1105 ret = cpsw_ale_del_vlan(cpsw->ale, vid, 0);
1106 ret |= cpsw_ale_del_ucast(cpsw->ale, priv->mac_addr,
1107 HOST_PORT_NUM, ALE_VLAN, vid);
1108 ret |= cpsw_ale_del_mcast(cpsw->ale, priv->ndev->broadcast,
1109 0, ALE_VLAN, vid);
1110 ret |= cpsw_ale_flush_multicast(cpsw->ale, ALE_PORT_HOST, vid);
1111 err:
1112 pm_runtime_put(cpsw->dev);
1113 return ret;
1114 }
1115
1116 static int cpsw_ndo_xdp_xmit(struct net_device *ndev, int n,
1117 struct xdp_frame **frames, u32 flags)
1118 {
1119 struct cpsw_priv *priv = netdev_priv(ndev);
1120 struct cpsw_common *cpsw = priv->cpsw;
1121 struct xdp_frame *xdpf;
1122 int i, nxmit = 0, port;
1123
1124 if (unlikely(flags & ~XDP_XMIT_FLAGS_MASK))
1125 return -EINVAL;
1126
1127 for (i = 0; i < n; i++) {
1128 xdpf = frames[i];
1129 if (xdpf->len < CPSW_MIN_PACKET_SIZE)
1130 break;
1131
1132 port = priv->emac_port + cpsw->data.dual_emac;
1133 if (cpsw_xdp_tx_frame(priv, xdpf, NULL, port))
1134 break;
1135 nxmit++;
1136 }
1137
1138 return nxmit;
1139 }
1140
1141 #ifdef CONFIG_NET_POLL_CONTROLLER
1142 static void cpsw_ndo_poll_controller(struct net_device *ndev)
1143 {
1144 struct cpsw_common *cpsw = ndev_to_cpsw(ndev);
1145
1146 cpsw_intr_disable(cpsw);
1147 cpsw_rx_interrupt(cpsw->irqs_table[0], cpsw);
1148 cpsw_tx_interrupt(cpsw->irqs_table[1], cpsw);
1149 cpsw_intr_enable(cpsw);
1150 }
1151 #endif
1152
1153 static const struct net_device_ops cpsw_netdev_ops = {
1154 .ndo_open = cpsw_ndo_open,
1155 .ndo_stop = cpsw_ndo_stop,
1156 .ndo_start_xmit = cpsw_ndo_start_xmit,
1157 .ndo_set_mac_address = cpsw_ndo_set_mac_address,
1158 .ndo_eth_ioctl = cpsw_ndo_ioctl,
1159 .ndo_validate_addr = eth_validate_addr,
1160 .ndo_tx_timeout = cpsw_ndo_tx_timeout,
1161 .ndo_set_rx_mode = cpsw_ndo_set_rx_mode,
1162 .ndo_set_tx_maxrate = cpsw_ndo_set_tx_maxrate,
1163 #ifdef CONFIG_NET_POLL_CONTROLLER
1164 .ndo_poll_controller = cpsw_ndo_poll_controller,
1165 #endif
1166 .ndo_vlan_rx_add_vid = cpsw_ndo_vlan_rx_add_vid,
1167 .ndo_vlan_rx_kill_vid = cpsw_ndo_vlan_rx_kill_vid,
1168 .ndo_setup_tc = cpsw_ndo_setup_tc,
1169 .ndo_bpf = cpsw_ndo_bpf,
1170 .ndo_xdp_xmit = cpsw_ndo_xdp_xmit,
1171 };
1172
1173 static void cpsw_get_drvinfo(struct net_device *ndev,
1174 struct ethtool_drvinfo *info)
1175 {
1176 struct cpsw_common *cpsw = ndev_to_cpsw(ndev);
1177 struct platform_device *pdev = to_platform_device(cpsw->dev);
1178
1179 strscpy(info->driver, "cpsw", sizeof(info->driver));
1180 strscpy(info->version, "1.0", sizeof(info->version));
1181 strscpy(info->bus_info, pdev->name, sizeof(info->bus_info));
1182 }
1183
1184 static int cpsw_set_pauseparam(struct net_device *ndev,
1185 struct ethtool_pauseparam *pause)
1186 {
1187 struct cpsw_priv *priv = netdev_priv(ndev);
1188 bool link;
1189
1190 priv->rx_pause = pause->rx_pause ? true : false;
1191 priv->tx_pause = pause->tx_pause ? true : false;
1192
1193 for_each_slave(priv, _cpsw_adjust_link, priv, &link);
1194 return 0;
1195 }
1196
1197 static int cpsw_set_channels(struct net_device *ndev,
1198 struct ethtool_channels *chs)
1199 {
1200 return cpsw_set_channels_common(ndev, chs, cpsw_rx_handler);
1201 }
1202
1203 static const struct ethtool_ops cpsw_ethtool_ops = {
1204 .supported_coalesce_params = ETHTOOL_COALESCE_RX_USECS,
1205 .get_drvinfo = cpsw_get_drvinfo,
1206 .get_msglevel = cpsw_get_msglevel,
1207 .set_msglevel = cpsw_set_msglevel,
1208 .get_link = ethtool_op_get_link,
1209 .get_ts_info = cpsw_get_ts_info,
1210 .get_coalesce = cpsw_get_coalesce,
1211 .set_coalesce = cpsw_set_coalesce,
1212 .get_sset_count = cpsw_get_sset_count,
1213 .get_strings = cpsw_get_strings,
1214 .get_ethtool_stats = cpsw_get_ethtool_stats,
1215 .get_pauseparam = cpsw_get_pauseparam,
1216 .set_pauseparam = cpsw_set_pauseparam,
1217 .get_wol = cpsw_get_wol,
1218 .set_wol = cpsw_set_wol,
1219 .get_regs_len = cpsw_get_regs_len,
1220 .get_regs = cpsw_get_regs,
1221 .begin = cpsw_ethtool_op_begin,
1222 .complete = cpsw_ethtool_op_complete,
1223 .get_channels = cpsw_get_channels,
1224 .set_channels = cpsw_set_channels,
1225 .get_link_ksettings = cpsw_get_link_ksettings,
1226 .set_link_ksettings = cpsw_set_link_ksettings,
1227 .get_eee = cpsw_get_eee,
1228 .set_eee = cpsw_set_eee,
1229 .nway_reset = cpsw_nway_reset,
1230 .get_ringparam = cpsw_get_ringparam,
1231 .set_ringparam = cpsw_set_ringparam,
1232 };
1233
1234 static int cpsw_probe_dt(struct cpsw_platform_data *data,
1235 struct platform_device *pdev)
1236 {
1237 struct device_node *node = pdev->dev.of_node;
1238 struct device_node *slave_node;
1239 int i = 0, ret;
1240 u32 prop;
1241
1242 if (!node)
1243 return -EINVAL;
1244
1245 if (of_property_read_u32(node, "slaves", &prop)) {
1246 dev_err(&pdev->dev, "Missing slaves property in the DT.\n");
1247 return -EINVAL;
1248 }
1249 data->slaves = prop;
1250
1251 if (of_property_read_u32(node, "active_slave", &prop)) {
1252 dev_err(&pdev->dev, "Missing active_slave property in the DT.\n");
1253 return -EINVAL;
1254 }
1255 data->active_slave = prop;
1256
1257 data->slave_data = devm_kcalloc(&pdev->dev,
1258 data->slaves,
1259 sizeof(struct cpsw_slave_data),
1260 GFP_KERNEL);
1261 if (!data->slave_data)
1262 return -ENOMEM;
1263
1264 if (of_property_read_u32(node, "cpdma_channels", &prop)) {
1265 dev_err(&pdev->dev, "Missing cpdma_channels property in the DT.\n");
1266 return -EINVAL;
1267 }
1268 data->channels = prop;
1269
1270 if (of_property_read_u32(node, "bd_ram_size", &prop)) {
1271 dev_err(&pdev->dev, "Missing bd_ram_size property in the DT.\n");
1272 return -EINVAL;
1273 }
1274 data->bd_ram_size = prop;
1275
1276 if (of_property_read_u32(node, "mac_control", &prop)) {
1277 dev_err(&pdev->dev, "Missing mac_control property in the DT.\n");
1278 return -EINVAL;
1279 }
1280 data->mac_control = prop;
1281
1282 if (of_property_read_bool(node, "dual_emac"))
1283 data->dual_emac = true;
1284
1285 /*
1286 * Populate all the child nodes here...
1287 */
1288 ret = of_platform_populate(node, NULL, NULL, &pdev->dev);
1289 /* We do not want to force this, as in some cases may not have child */
1290 if (ret)
1291 dev_warn(&pdev->dev, "Doesn't have any child node\n");
1292
1293 for_each_available_child_of_node(node, slave_node) {
1294 struct cpsw_slave_data *slave_data = data->slave_data + i;
1295 int lenp;
1296 const __be32 *parp;
1297
1298 /* This is no slave child node, continue */
1299 if (!of_node_name_eq(slave_node, "slave"))
1300 continue;
1301
1302 slave_data->ifphy = devm_of_phy_get(&pdev->dev, slave_node,
1303 NULL);
1304 if (!IS_ENABLED(CONFIG_TI_CPSW_PHY_SEL) &&
1305 IS_ERR(slave_data->ifphy)) {
1306 ret = PTR_ERR(slave_data->ifphy);
1307 dev_err(&pdev->dev,
1308 "%d: Error retrieving port phy: %d\n", i, ret);
1309 goto err_node_put;
1310 }
1311
1312 slave_data->slave_node = slave_node;
1313 slave_data->phy_node = of_parse_phandle(slave_node,
1314 "phy-handle", 0);
1315 parp = of_get_property(slave_node, "phy_id", &lenp);
1316 if (slave_data->phy_node) {
1317 dev_dbg(&pdev->dev,
1318 "slave[%d] using phy-handle=\"%pOF\"\n",
1319 i, slave_data->phy_node);
1320 } else if (of_phy_is_fixed_link(slave_node)) {
1321 /* In the case of a fixed PHY, the DT node associated
1322 * to the PHY is the Ethernet MAC DT node.
1323 */
1324 ret = of_phy_register_fixed_link(slave_node);
1325 if (ret) {
1326 dev_err_probe(&pdev->dev, ret, "failed to register fixed-link phy\n");
1327 goto err_node_put;
1328 }
1329 slave_data->phy_node = of_node_get(slave_node);
1330 } else if (parp) {
1331 u32 phyid;
1332 struct device_node *mdio_node;
1333 struct platform_device *mdio;
1334
1335 if (lenp != (sizeof(__be32) * 2)) {
1336 dev_err(&pdev->dev, "Invalid slave[%d] phy_id property\n", i);
1337 goto no_phy_slave;
1338 }
1339 mdio_node = of_find_node_by_phandle(be32_to_cpup(parp));
1340 phyid = be32_to_cpup(parp+1);
1341 mdio = of_find_device_by_node(mdio_node);
1342 of_node_put(mdio_node);
1343 if (!mdio) {
1344 dev_err(&pdev->dev, "Missing mdio platform device\n");
1345 ret = -EINVAL;
1346 goto err_node_put;
1347 }
1348 snprintf(slave_data->phy_id, sizeof(slave_data->phy_id),
1349 PHY_ID_FMT, mdio->name, phyid);
1350 put_device(&mdio->dev);
1351 } else {
1352 dev_err(&pdev->dev,
1353 "No slave[%d] phy_id, phy-handle, or fixed-link property\n",
1354 i);
1355 goto no_phy_slave;
1356 }
1357 ret = of_get_phy_mode(slave_node, &slave_data->phy_if);
1358 if (ret) {
1359 dev_err(&pdev->dev, "Missing or malformed slave[%d] phy-mode property\n",
1360 i);
1361 goto err_node_put;
1362 }
1363
1364 no_phy_slave:
1365 ret = of_get_mac_address(slave_node, slave_data->mac_addr);
1366 if (ret) {
1367 ret = ti_cm_get_macid(&pdev->dev, i,
1368 slave_data->mac_addr);
1369 if (ret)
1370 goto err_node_put;
1371 }
1372 if (data->dual_emac) {
1373 if (of_property_read_u32(slave_node, "dual_emac_res_vlan",
1374 &prop)) {
1375 dev_err(&pdev->dev, "Missing dual_emac_res_vlan in DT.\n");
1376 slave_data->dual_emac_res_vlan = i+1;
1377 dev_err(&pdev->dev, "Using %d as Reserved VLAN for %d slave\n",
1378 slave_data->dual_emac_res_vlan, i);
1379 } else {
1380 slave_data->dual_emac_res_vlan = prop;
1381 }
1382 }
1383
1384 i++;
1385 if (i == data->slaves) {
1386 ret = 0;
1387 goto err_node_put;
1388 }
1389 }
1390
1391 return 0;
1392
1393 err_node_put:
1394 of_node_put(slave_node);
1395 return ret;
1396 }
1397
1398 static void cpsw_remove_dt(struct platform_device *pdev)
1399 {
1400 struct cpsw_common *cpsw = platform_get_drvdata(pdev);
1401 struct cpsw_platform_data *data = &cpsw->data;
1402 struct device_node *node = pdev->dev.of_node;
1403 struct device_node *slave_node;
1404 int i = 0;
1405
1406 for_each_available_child_of_node(node, slave_node) {
1407 struct cpsw_slave_data *slave_data = &data->slave_data[i];
1408
1409 if (!of_node_name_eq(slave_node, "slave"))
1410 continue;
1411
1412 if (of_phy_is_fixed_link(slave_node))
1413 of_phy_deregister_fixed_link(slave_node);
1414
1415 of_node_put(slave_data->phy_node);
1416
1417 i++;
1418 if (i == data->slaves) {
1419 of_node_put(slave_node);
1420 break;
1421 }
1422 }
1423
1424 of_platform_depopulate(&pdev->dev);
1425 }
1426
1427 static int cpsw_probe_dual_emac(struct cpsw_priv *priv)
1428 {
1429 struct cpsw_common *cpsw = priv->cpsw;
1430 struct cpsw_platform_data *data = &cpsw->data;
1431 struct net_device *ndev;
1432 struct cpsw_priv *priv_sl2;
1433 int ret = 0;
1434
1435 ndev = devm_alloc_etherdev_mqs(cpsw->dev, sizeof(struct cpsw_priv),
1436 CPSW_MAX_QUEUES, CPSW_MAX_QUEUES);
1437 if (!ndev) {
1438 dev_err(cpsw->dev, "cpsw: error allocating net_device\n");
1439 return -ENOMEM;
1440 }
1441
1442 priv_sl2 = netdev_priv(ndev);
1443 priv_sl2->cpsw = cpsw;
1444 priv_sl2->ndev = ndev;
1445 priv_sl2->dev = &ndev->dev;
1446 priv_sl2->msg_enable = netif_msg_init(debug_level, CPSW_DEBUG);
1447
1448 if (is_valid_ether_addr(data->slave_data[1].mac_addr)) {
1449 memcpy(priv_sl2->mac_addr, data->slave_data[1].mac_addr,
1450 ETH_ALEN);
1451 dev_info(cpsw->dev, "cpsw: Detected MACID = %pM\n",
1452 priv_sl2->mac_addr);
1453 } else {
1454 eth_random_addr(priv_sl2->mac_addr);
1455 dev_info(cpsw->dev, "cpsw: Random MACID = %pM\n",
1456 priv_sl2->mac_addr);
1457 }
1458 eth_hw_addr_set(ndev, priv_sl2->mac_addr);
1459
1460 priv_sl2->emac_port = 1;
1461 cpsw->slaves[1].ndev = ndev;
1462 ndev->features |= NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_HW_VLAN_CTAG_RX;
1463 ndev->xdp_features = NETDEV_XDP_ACT_BASIC | NETDEV_XDP_ACT_REDIRECT |
1464 NETDEV_XDP_ACT_NDO_XMIT;
1465
1466 ndev->netdev_ops = &cpsw_netdev_ops;
1467 ndev->ethtool_ops = &cpsw_ethtool_ops;
1468
1469 /* register the network device */
1470 SET_NETDEV_DEV(ndev, cpsw->dev);
1471 ndev->dev.of_node = cpsw->slaves[1].data->slave_node;
1472 ret = register_netdev(ndev);
1473 if (ret)
1474 dev_err(cpsw->dev, "cpsw: error registering net device\n");
1475
1476 return ret;
1477 }
1478
1479 static const struct of_device_id cpsw_of_mtable[] = {
1480 { .compatible = "ti,cpsw"},
1481 { .compatible = "ti,am335x-cpsw"},
1482 { .compatible = "ti,am4372-cpsw"},
1483 { .compatible = "ti,dra7-cpsw"},
1484 { /* sentinel */ },
1485 };
1486 MODULE_DEVICE_TABLE(of, cpsw_of_mtable);
1487
1488 static const struct soc_device_attribute cpsw_soc_devices[] = {
1489 { .family = "AM33xx", .revision = "ES1.0"},
1490 { /* sentinel */ }
1491 };
1492
1493 static int cpsw_probe(struct platform_device *pdev)
1494 {
1495 struct device *dev = &pdev->dev;
1496 struct clk *clk;
1497 struct cpsw_platform_data *data;
1498 struct net_device *ndev;
1499 struct cpsw_priv *priv;
1500 void __iomem *ss_regs;
1501 struct resource *ss_res;
1502 struct gpio_descs *mode;
1503 const struct soc_device_attribute *soc;
1504 struct cpsw_common *cpsw;
1505 int ret = 0, ch;
1506 int irq;
1507
1508 cpsw = devm_kzalloc(dev, sizeof(struct cpsw_common), GFP_KERNEL);
1509 if (!cpsw)
1510 return -ENOMEM;
1511
1512 platform_set_drvdata(pdev, cpsw);
1513 cpsw_slave_index = cpsw_slave_index_priv;
1514
1515 cpsw->dev = dev;
1516
1517 mode = devm_gpiod_get_array_optional(dev, "mode", GPIOD_OUT_LOW);
1518 if (IS_ERR(mode)) {
1519 ret = PTR_ERR(mode);
1520 dev_err(dev, "gpio request failed, ret %d\n", ret);
1521 return ret;
1522 }
1523
1524 clk = devm_clk_get(dev, "fck");
1525 if (IS_ERR(clk)) {
1526 ret = PTR_ERR(clk);
1527 dev_err(dev, "fck is not found %d\n", ret);
1528 return ret;
1529 }
1530 cpsw->bus_freq_mhz = clk_get_rate(clk) / 1000000;
1531
1532 ss_regs = devm_platform_get_and_ioremap_resource(pdev, 0, &ss_res);
1533 if (IS_ERR(ss_regs))
1534 return PTR_ERR(ss_regs);
1535 cpsw->regs = ss_regs;
1536
1537 cpsw->wr_regs = devm_platform_ioremap_resource(pdev, 1);
1538 if (IS_ERR(cpsw->wr_regs))
1539 return PTR_ERR(cpsw->wr_regs);
1540
1541 /* RX IRQ */
1542 irq = platform_get_irq(pdev, 1);
1543 if (irq < 0)
1544 return irq;
1545 cpsw->irqs_table[0] = irq;
1546
1547 /* TX IRQ */
1548 irq = platform_get_irq(pdev, 2);
1549 if (irq < 0)
1550 return irq;
1551 cpsw->irqs_table[1] = irq;
1552
1553 /* get misc irq*/
1554 irq = platform_get_irq(pdev, 3);
1555 if (irq <= 0)
1556 return irq;
1557 cpsw->misc_irq = irq;
1558
1559 /*
1560 * This may be required here for child devices.
1561 */
1562 pm_runtime_enable(dev);
1563
1564 /* Need to enable clocks with runtime PM api to access module
1565 * registers
1566 */
1567 ret = pm_runtime_resume_and_get(dev);
1568 if (ret < 0)
1569 goto clean_runtime_disable_ret;
1570
1571 ret = cpsw_probe_dt(&cpsw->data, pdev);
1572 if (ret)
1573 goto clean_dt_ret;
1574
1575 soc = soc_device_match(cpsw_soc_devices);
1576 if (soc)
1577 cpsw->quirk_irq = true;
1578
1579 data = &cpsw->data;
1580 cpsw->slaves = devm_kcalloc(dev,
1581 data->slaves, sizeof(struct cpsw_slave),
1582 GFP_KERNEL);
1583 if (!cpsw->slaves) {
1584 ret = -ENOMEM;
1585 goto clean_dt_ret;
1586 }
1587
1588 cpsw->rx_packet_max = max(rx_packet_max, CPSW_MAX_PACKET_SIZE);
1589 cpsw->descs_pool_size = descs_pool_size;
1590
1591 ret = cpsw_init_common(cpsw, ss_regs, ale_ageout,
1592 ss_res->start + CPSW2_BD_OFFSET,
1593 descs_pool_size);
1594 if (ret)
1595 goto clean_dt_ret;
1596
1597 ch = cpsw->quirk_irq ? 0 : 7;
1598 cpsw->txv[0].ch = cpdma_chan_create(cpsw->dma, ch, cpsw_tx_handler, 0);
1599 if (IS_ERR(cpsw->txv[0].ch)) {
1600 dev_err(dev, "error initializing tx dma channel\n");
1601 ret = PTR_ERR(cpsw->txv[0].ch);
1602 goto clean_cpts;
1603 }
1604
1605 cpsw->rxv[0].ch = cpdma_chan_create(cpsw->dma, 0, cpsw_rx_handler, 1);
1606 if (IS_ERR(cpsw->rxv[0].ch)) {
1607 dev_err(dev, "error initializing rx dma channel\n");
1608 ret = PTR_ERR(cpsw->rxv[0].ch);
1609 goto clean_cpts;
1610 }
1611 cpsw_split_res(cpsw);
1612
1613 /* setup netdev */
1614 ndev = devm_alloc_etherdev_mqs(dev, sizeof(struct cpsw_priv),
1615 CPSW_MAX_QUEUES, CPSW_MAX_QUEUES);
1616 if (!ndev) {
1617 dev_err(dev, "error allocating net_device\n");
1618 ret = -ENOMEM;
1619 goto clean_cpts;
1620 }
1621
1622 priv = netdev_priv(ndev);
1623 priv->cpsw = cpsw;
1624 priv->ndev = ndev;
1625 priv->dev = dev;
1626 priv->msg_enable = netif_msg_init(debug_level, CPSW_DEBUG);
1627 priv->emac_port = 0;
1628
1629 if (is_valid_ether_addr(data->slave_data[0].mac_addr)) {
1630 memcpy(priv->mac_addr, data->slave_data[0].mac_addr, ETH_ALEN);
1631 dev_info(dev, "Detected MACID = %pM\n", priv->mac_addr);
1632 } else {
1633 eth_random_addr(priv->mac_addr);
1634 dev_info(dev, "Random MACID = %pM\n", priv->mac_addr);
1635 }
1636
1637 eth_hw_addr_set(ndev, priv->mac_addr);
1638
1639 cpsw->slaves[0].ndev = ndev;
1640
1641 ndev->features |= NETIF_F_HW_VLAN_CTAG_FILTER | NETIF_F_HW_VLAN_CTAG_RX;
1642 ndev->xdp_features = NETDEV_XDP_ACT_BASIC | NETDEV_XDP_ACT_REDIRECT |
1643 NETDEV_XDP_ACT_NDO_XMIT;
1644
1645 ndev->netdev_ops = &cpsw_netdev_ops;
1646 ndev->ethtool_ops = &cpsw_ethtool_ops;
1647 netif_napi_add(ndev, &cpsw->napi_rx,
1648 cpsw->quirk_irq ? cpsw_rx_poll : cpsw_rx_mq_poll);
1649 netif_napi_add_tx(ndev, &cpsw->napi_tx,
1650 cpsw->quirk_irq ? cpsw_tx_poll : cpsw_tx_mq_poll);
1651
1652 /* register the network device */
1653 SET_NETDEV_DEV(ndev, dev);
1654 ndev->dev.of_node = cpsw->slaves[0].data->slave_node;
1655 ret = register_netdev(ndev);
1656 if (ret) {
1657 dev_err(dev, "error registering net device\n");
1658 ret = -ENODEV;
1659 goto clean_cpts;
1660 }
1661
1662 if (cpsw->data.dual_emac) {
1663 ret = cpsw_probe_dual_emac(priv);
1664 if (ret) {
1665 cpsw_err(priv, probe, "error probe slave 2 emac interface\n");
1666 goto clean_unregister_netdev_ret;
1667 }
1668 }
1669
1670 /* Grab RX and TX IRQs. Note that we also have RX_THRESHOLD and
1671 * MISC IRQs which are always kept disabled with this driver so
1672 * we will not request them.
1673 *
1674 * If anyone wants to implement support for those, make sure to
1675 * first request and append them to irqs_table array.
1676 */
1677 ret = devm_request_irq(dev, cpsw->irqs_table[0], cpsw_rx_interrupt,
1678 0, dev_name(dev), cpsw);
1679 if (ret < 0) {
1680 dev_err(dev, "error attaching irq (%d)\n", ret);
1681 goto clean_unregister_netdev_ret;
1682 }
1683
1684
1685 ret = devm_request_irq(dev, cpsw->irqs_table[1], cpsw_tx_interrupt,
1686 0, dev_name(&pdev->dev), cpsw);
1687 if (ret < 0) {
1688 dev_err(dev, "error attaching irq (%d)\n", ret);
1689 goto clean_unregister_netdev_ret;
1690 }
1691
1692 if (!cpsw->cpts)
1693 goto skip_cpts;
1694
1695 ret = devm_request_irq(&pdev->dev, cpsw->misc_irq, cpsw_misc_interrupt,
1696 0, dev_name(&pdev->dev), cpsw);
1697 if (ret < 0) {
1698 dev_err(dev, "error attaching misc irq (%d)\n", ret);
1699 goto clean_unregister_netdev_ret;
1700 }
1701
1702 /* Enable misc CPTS evnt_pend IRQ */
1703 cpts_set_irqpoll(cpsw->cpts, false);
1704
1705 skip_cpts:
1706 cpsw_notice(priv, probe,
1707 "initialized device (regs %pa, irq %d, pool size %d)\n",
1708 &ss_res->start, cpsw->irqs_table[0], descs_pool_size);
1709
1710 pm_runtime_put(&pdev->dev);
1711
1712 return 0;
1713
1714 clean_unregister_netdev_ret:
1715 unregister_netdev(ndev);
1716 clean_cpts:
1717 cpts_release(cpsw->cpts);
1718 cpdma_ctlr_destroy(cpsw->dma);
1719 clean_dt_ret:
1720 cpsw_remove_dt(pdev);
1721 pm_runtime_put_sync(&pdev->dev);
1722 clean_runtime_disable_ret:
1723 pm_runtime_disable(&pdev->dev);
1724 return ret;
1725 }
1726
1727 static void cpsw_remove(struct platform_device *pdev)
1728 {
1729 struct cpsw_common *cpsw = platform_get_drvdata(pdev);
1730 int i, ret;
1731
1732 ret = pm_runtime_resume_and_get(&pdev->dev);
1733 if (ret < 0) {
1734 /* Note, if this error path is taken, we're leaking some
1735 * resources.
1736 */
1737 dev_err(&pdev->dev, "Failed to resume device (%pe)\n",
1738 ERR_PTR(ret));
1739 return;
1740 }
1741
1742 for (i = 0; i < cpsw->data.slaves; i++)
1743 if (cpsw->slaves[i].ndev)
1744 unregister_netdev(cpsw->slaves[i].ndev);
1745
1746 cpts_release(cpsw->cpts);
1747 cpdma_ctlr_destroy(cpsw->dma);
1748 cpsw_remove_dt(pdev);
1749 pm_runtime_put_sync(&pdev->dev);
1750 pm_runtime_disable(&pdev->dev);
1751 }
1752
1753 #ifdef CONFIG_PM_SLEEP
1754 static int cpsw_suspend(struct device *dev)
1755 {
1756 struct cpsw_common *cpsw = dev_get_drvdata(dev);
1757 int i;
1758
1759 rtnl_lock();
1760
1761 for (i = 0; i < cpsw->data.slaves; i++)
1762 if (cpsw->slaves[i].ndev)
1763 if (netif_running(cpsw->slaves[i].ndev))
1764 cpsw_ndo_stop(cpsw->slaves[i].ndev);
1765
1766 rtnl_unlock();
1767
1768 /* Select sleep pin state */
1769 pinctrl_pm_select_sleep_state(dev);
1770
1771 return 0;
1772 }
1773
1774 static int cpsw_resume(struct device *dev)
1775 {
1776 struct cpsw_common *cpsw = dev_get_drvdata(dev);
1777 int i;
1778
1779 /* Select default pin state */
1780 pinctrl_pm_select_default_state(dev);
1781
1782 /* shut up ASSERT_RTNL() warning in netif_set_real_num_tx/rx_queues */
1783 rtnl_lock();
1784
1785 for (i = 0; i < cpsw->data.slaves; i++)
1786 if (cpsw->slaves[i].ndev)
1787 if (netif_running(cpsw->slaves[i].ndev))
1788 cpsw_ndo_open(cpsw->slaves[i].ndev);
1789
1790 rtnl_unlock();
1791
1792 return 0;
1793 }
1794 #endif
1795
1796 static SIMPLE_DEV_PM_OPS(cpsw_pm_ops, cpsw_suspend, cpsw_resume);
1797
1798 static struct platform_driver cpsw_driver = {
1799 .driver = {
1800 .name = "cpsw",
1801 .pm = &cpsw_pm_ops,
1802 .of_match_table = cpsw_of_mtable,
1803 },
1804 .probe = cpsw_probe,
1805 .remove = cpsw_remove,
1806 };
1807
1808 module_platform_driver(cpsw_driver);
1809
1810 MODULE_LICENSE("GPL");
1811 MODULE_AUTHOR("Cyril Chemparathy <cyril@ti.com>");
1812 MODULE_AUTHOR("Mugunthan V N <mugunthanvnm@ti.com>");
1813 MODULE_DESCRIPTION("TI CPSW Ethernet driver");
Kernel DRM miscellaneous fixes and cross-tree changes