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