1 // SPDX-License-Identifier: GPL-2.0
2 #define pr_fmt(fmt) "bcmasp_intf: " fmt
3
4 #include <asm/byteorder.h>
5 #include <linux/brcmphy.h>
6 #include <linux/clk.h>
7 #include <linux/delay.h>
8 #include <linux/etherdevice.h>
9 #include <linux/netdevice.h>
10 #include <linux/of_net.h>
11 #include <linux/of_mdio.h>
12 #include <linux/phy.h>
13 #include <linux/phy_fixed.h>
14 #include <linux/ptp_classify.h>
15 #include <linux/platform_device.h>
16 #include <net/ip.h>
17 #include <net/ipv6.h>
18
19 #include "bcmasp.h"
20 #include "bcmasp_intf_defs.h"
21
incr_ring(int index, int ring_count)22 static int incr_ring(int index, int ring_count)
23 {
24 index++;
25 if (index == ring_count)
26 return 0;
27
28 return index;
29 }
30
31 /* Points to last byte of descriptor */
incr_last_byte(dma_addr_t addr, dma_addr_t beg, int ring_count)32 static dma_addr_t incr_last_byte(dma_addr_t addr, dma_addr_t beg,
33 int ring_count)
34 {
35 dma_addr_t end = beg + (ring_count * DESC_SIZE);
36
37 addr += DESC_SIZE;
38 if (addr > end)
39 return beg + DESC_SIZE - 1;
40
41 return addr;
42 }
43
44 /* Points to first byte of descriptor */
incr_first_byte(dma_addr_t addr, dma_addr_t beg, int ring_count)45 static dma_addr_t incr_first_byte(dma_addr_t addr, dma_addr_t beg,
46 int ring_count)
47 {
48 dma_addr_t end = beg + (ring_count * DESC_SIZE);
49
50 addr += DESC_SIZE;
51 if (addr >= end)
52 return beg;
53
54 return addr;
55 }
56
bcmasp_enable_tx(struct bcmasp_intf *intf, int en)57 static void bcmasp_enable_tx(struct bcmasp_intf *intf, int en)
58 {
59 if (en) {
60 tx_spb_ctrl_wl(intf, TX_SPB_CTRL_ENABLE_EN, TX_SPB_CTRL_ENABLE);
61 tx_epkt_core_wl(intf, (TX_EPKT_C_CFG_MISC_EN |
62 TX_EPKT_C_CFG_MISC_PT |
63 (intf->port << TX_EPKT_C_CFG_MISC_PS_SHIFT)),
64 TX_EPKT_C_CFG_MISC);
65 } else {
66 tx_spb_ctrl_wl(intf, 0x0, TX_SPB_CTRL_ENABLE);
67 tx_epkt_core_wl(intf, 0x0, TX_EPKT_C_CFG_MISC);
68 }
69 }
70
bcmasp_enable_rx(struct bcmasp_intf *intf, int en)71 static void bcmasp_enable_rx(struct bcmasp_intf *intf, int en)
72 {
73 if (en)
74 rx_edpkt_cfg_wl(intf, RX_EDPKT_CFG_ENABLE_EN,
75 RX_EDPKT_CFG_ENABLE);
76 else
77 rx_edpkt_cfg_wl(intf, 0x0, RX_EDPKT_CFG_ENABLE);
78 }
79
bcmasp_set_rx_mode(struct net_device *dev)80 static void bcmasp_set_rx_mode(struct net_device *dev)
81 {
82 unsigned char mask[] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
83 struct bcmasp_intf *intf = netdev_priv(dev);
84 struct netdev_hw_addr *ha;
85 int ret;
86
87 spin_lock_bh(&intf->parent->mda_lock);
88
89 bcmasp_disable_all_filters(intf);
90
91 if (dev->flags & IFF_PROMISC)
92 goto set_promisc;
93
94 bcmasp_set_promisc(intf, 0);
95
96 bcmasp_set_broad(intf, 1);
97
98 bcmasp_set_oaddr(intf, dev->dev_addr, 1);
99
100 if (dev->flags & IFF_ALLMULTI) {
101 bcmasp_set_allmulti(intf, 1);
102 } else {
103 bcmasp_set_allmulti(intf, 0);
104
105 netdev_for_each_mc_addr(ha, dev) {
106 ret = bcmasp_set_en_mda_filter(intf, ha->addr, mask);
107 if (ret) {
108 intf->mib.mc_filters_full_cnt++;
109 goto set_promisc;
110 }
111 }
112 }
113
114 netdev_for_each_uc_addr(ha, dev) {
115 ret = bcmasp_set_en_mda_filter(intf, ha->addr, mask);
116 if (ret) {
117 intf->mib.uc_filters_full_cnt++;
118 goto set_promisc;
119 }
120 }
121
122 spin_unlock_bh(&intf->parent->mda_lock);
123 return;
124
125 set_promisc:
126 bcmasp_set_promisc(intf, 1);
127 intf->mib.promisc_filters_cnt++;
128
129 /* disable all filters used by this port */
130 bcmasp_disable_all_filters(intf);
131
132 spin_unlock_bh(&intf->parent->mda_lock);
133 }
134
bcmasp_clean_txcb(struct bcmasp_intf *intf, int index)135 static void bcmasp_clean_txcb(struct bcmasp_intf *intf, int index)
136 {
137 struct bcmasp_tx_cb *txcb = &intf->tx_cbs[index];
138
139 txcb->skb = NULL;
140 dma_unmap_addr_set(txcb, dma_addr, 0);
141 dma_unmap_len_set(txcb, dma_len, 0);
142 txcb->last = false;
143 }
144
tx_spb_ring_full(struct bcmasp_intf *intf, int cnt)145 static int tx_spb_ring_full(struct bcmasp_intf *intf, int cnt)
146 {
147 int next_index, i;
148
149 /* Check if we have enough room for cnt descriptors */
150 for (i = 0; i < cnt; i++) {
151 next_index = incr_ring(intf->tx_spb_index, DESC_RING_COUNT);
152 if (next_index == intf->tx_spb_clean_index)
153 return 1;
154 }
155
156 return 0;
157 }
158
bcmasp_csum_offload(struct net_device *dev, struct sk_buff *skb, bool *csum_hw)159 static struct sk_buff *bcmasp_csum_offload(struct net_device *dev,
160 struct sk_buff *skb,
161 bool *csum_hw)
162 {
163 struct bcmasp_intf *intf = netdev_priv(dev);
164 u32 header = 0, header2 = 0, epkt = 0;
165 struct bcmasp_pkt_offload *offload;
166 unsigned int header_cnt = 0;
167 u8 ip_proto;
168 int ret;
169
170 if (skb->ip_summed != CHECKSUM_PARTIAL)
171 return skb;
172
173 ret = skb_cow_head(skb, sizeof(*offload));
174 if (ret < 0) {
175 intf->mib.tx_realloc_offload_failed++;
176 goto help;
177 }
178
179 switch (skb->protocol) {
180 case htons(ETH_P_IP):
181 header |= PKT_OFFLOAD_HDR_SIZE_2((ip_hdrlen(skb) >> 8) & 0xf);
182 header2 |= PKT_OFFLOAD_HDR2_SIZE_2(ip_hdrlen(skb) & 0xff);
183 epkt |= PKT_OFFLOAD_EPKT_IP(0) | PKT_OFFLOAD_EPKT_CSUM_L2;
184 ip_proto = ip_hdr(skb)->protocol;
185 header_cnt += 2;
186 break;
187 case htons(ETH_P_IPV6):
188 header |= PKT_OFFLOAD_HDR_SIZE_2((IP6_HLEN >> 8) & 0xf);
189 header2 |= PKT_OFFLOAD_HDR2_SIZE_2(IP6_HLEN & 0xff);
190 epkt |= PKT_OFFLOAD_EPKT_IP(1) | PKT_OFFLOAD_EPKT_CSUM_L2;
191 ip_proto = ipv6_hdr(skb)->nexthdr;
192 header_cnt += 2;
193 break;
194 default:
195 goto help;
196 }
197
198 switch (ip_proto) {
199 case IPPROTO_TCP:
200 header2 |= PKT_OFFLOAD_HDR2_SIZE_3(tcp_hdrlen(skb));
201 epkt |= PKT_OFFLOAD_EPKT_TP(0) | PKT_OFFLOAD_EPKT_CSUM_L3;
202 header_cnt++;
203 break;
204 case IPPROTO_UDP:
205 header2 |= PKT_OFFLOAD_HDR2_SIZE_3(UDP_HLEN);
206 epkt |= PKT_OFFLOAD_EPKT_TP(1) | PKT_OFFLOAD_EPKT_CSUM_L3;
207 header_cnt++;
208 break;
209 default:
210 goto help;
211 }
212
213 offload = (struct bcmasp_pkt_offload *)skb_push(skb, sizeof(*offload));
214
215 header |= PKT_OFFLOAD_HDR_OP | PKT_OFFLOAD_HDR_COUNT(header_cnt) |
216 PKT_OFFLOAD_HDR_SIZE_1(ETH_HLEN);
217 epkt |= PKT_OFFLOAD_EPKT_OP;
218
219 offload->nop = htonl(PKT_OFFLOAD_NOP);
220 offload->header = htonl(header);
221 offload->header2 = htonl(header2);
222 offload->epkt = htonl(epkt);
223 offload->end = htonl(PKT_OFFLOAD_END_OP);
224 *csum_hw = true;
225
226 return skb;
227
228 help:
229 skb_checksum_help(skb);
230
231 return skb;
232 }
233
bcmasp_rx_edpkt_dma_rq(struct bcmasp_intf *intf)234 static unsigned long bcmasp_rx_edpkt_dma_rq(struct bcmasp_intf *intf)
235 {
236 return rx_edpkt_dma_rq(intf, RX_EDPKT_DMA_VALID);
237 }
238
bcmasp_rx_edpkt_cfg_wq(struct bcmasp_intf *intf, dma_addr_t addr)239 static void bcmasp_rx_edpkt_cfg_wq(struct bcmasp_intf *intf, dma_addr_t addr)
240 {
241 rx_edpkt_cfg_wq(intf, addr, RX_EDPKT_RING_BUFFER_READ);
242 }
243
bcmasp_rx_edpkt_dma_wq(struct bcmasp_intf *intf, dma_addr_t addr)244 static void bcmasp_rx_edpkt_dma_wq(struct bcmasp_intf *intf, dma_addr_t addr)
245 {
246 rx_edpkt_dma_wq(intf, addr, RX_EDPKT_DMA_READ);
247 }
248
bcmasp_tx_spb_dma_rq(struct bcmasp_intf *intf)249 static unsigned long bcmasp_tx_spb_dma_rq(struct bcmasp_intf *intf)
250 {
251 return tx_spb_dma_rq(intf, TX_SPB_DMA_READ);
252 }
253
bcmasp_tx_spb_dma_wq(struct bcmasp_intf *intf, dma_addr_t addr)254 static void bcmasp_tx_spb_dma_wq(struct bcmasp_intf *intf, dma_addr_t addr)
255 {
256 tx_spb_dma_wq(intf, addr, TX_SPB_DMA_VALID);
257 }
258
259 static const struct bcmasp_intf_ops bcmasp_intf_ops = {
260 .rx_desc_read = bcmasp_rx_edpkt_dma_rq,
261 .rx_buffer_write = bcmasp_rx_edpkt_cfg_wq,
262 .rx_desc_write = bcmasp_rx_edpkt_dma_wq,
263 .tx_read = bcmasp_tx_spb_dma_rq,
264 .tx_write = bcmasp_tx_spb_dma_wq,
265 };
266
bcmasp_xmit(struct sk_buff *skb, struct net_device *dev)267 static netdev_tx_t bcmasp_xmit(struct sk_buff *skb, struct net_device *dev)
268 {
269 struct bcmasp_intf *intf = netdev_priv(dev);
270 unsigned int total_bytes, size;
271 int spb_index, nr_frags, i, j;
272 struct bcmasp_tx_cb *txcb;
273 dma_addr_t mapping, valid;
274 struct bcmasp_desc *desc;
275 bool csum_hw = false;
276 struct device *kdev;
277 skb_frag_t *frag;
278
279 kdev = &intf->parent->pdev->dev;
280
281 nr_frags = skb_shinfo(skb)->nr_frags;
282
283 if (tx_spb_ring_full(intf, nr_frags + 1)) {
284 netif_stop_queue(dev);
285 if (net_ratelimit())
286 netdev_err(dev, "Tx Ring Full!\n");
287 return NETDEV_TX_BUSY;
288 }
289
290 /* Save skb len before adding csum offload header */
291 total_bytes = skb->len;
292 skb = bcmasp_csum_offload(dev, skb, &csum_hw);
293 if (!skb)
294 return NETDEV_TX_OK;
295
296 spb_index = intf->tx_spb_index;
297 valid = intf->tx_spb_dma_valid;
298 for (i = 0; i <= nr_frags; i++) {
299 if (!i) {
300 size = skb_headlen(skb);
301 if (!nr_frags && size < (ETH_ZLEN + ETH_FCS_LEN)) {
302 if (skb_put_padto(skb, ETH_ZLEN + ETH_FCS_LEN))
303 return NETDEV_TX_OK;
304 size = skb->len;
305 }
306 mapping = dma_map_single(kdev, skb->data, size,
307 DMA_TO_DEVICE);
308 } else {
309 frag = &skb_shinfo(skb)->frags[i - 1];
310 size = skb_frag_size(frag);
311 mapping = skb_frag_dma_map(kdev, frag, 0, size,
312 DMA_TO_DEVICE);
313 }
314
315 if (dma_mapping_error(kdev, mapping)) {
316 intf->mib.tx_dma_failed++;
317 spb_index = intf->tx_spb_index;
318 for (j = 0; j < i; j++) {
319 bcmasp_clean_txcb(intf, spb_index);
320 spb_index = incr_ring(spb_index,
321 DESC_RING_COUNT);
322 }
323 /* Rewind so we do not have a hole */
324 spb_index = intf->tx_spb_index;
325 return NETDEV_TX_OK;
326 }
327
328 txcb = &intf->tx_cbs[spb_index];
329 desc = &intf->tx_spb_cpu[spb_index];
330 memset(desc, 0, sizeof(*desc));
331 txcb->skb = skb;
332 txcb->bytes_sent = total_bytes;
333 dma_unmap_addr_set(txcb, dma_addr, mapping);
334 dma_unmap_len_set(txcb, dma_len, size);
335 if (!i) {
336 desc->flags |= DESC_SOF;
337 if (csum_hw)
338 desc->flags |= DESC_EPKT_CMD;
339 }
340
341 if (i == nr_frags) {
342 desc->flags |= DESC_EOF;
343 txcb->last = true;
344 }
345
346 desc->buf = mapping;
347 desc->size = size;
348 desc->flags |= DESC_INT_EN;
349
350 netif_dbg(intf, tx_queued, dev,
351 "%s dma_buf=%pad dma_len=0x%x flags=0x%x index=0x%x\n",
352 __func__, &mapping, desc->size, desc->flags,
353 spb_index);
354
355 spb_index = incr_ring(spb_index, DESC_RING_COUNT);
356 valid = incr_last_byte(valid, intf->tx_spb_dma_addr,
357 DESC_RING_COUNT);
358 }
359
360 /* Ensure all descriptors have been written to DRAM for the
361 * hardware to see up-to-date contents.
362 */
363 wmb();
364
365 intf->tx_spb_index = spb_index;
366 intf->tx_spb_dma_valid = valid;
367 bcmasp_intf_tx_write(intf, intf->tx_spb_dma_valid);
368
369 if (tx_spb_ring_full(intf, MAX_SKB_FRAGS + 1))
370 netif_stop_queue(dev);
371
372 return NETDEV_TX_OK;
373 }
374
bcmasp_netif_start(struct net_device *dev)375 static void bcmasp_netif_start(struct net_device *dev)
376 {
377 struct bcmasp_intf *intf = netdev_priv(dev);
378
379 bcmasp_set_rx_mode(dev);
380 napi_enable(&intf->tx_napi);
381 napi_enable(&intf->rx_napi);
382
383 bcmasp_enable_rx_irq(intf, 1);
384 bcmasp_enable_tx_irq(intf, 1);
385
386 phy_start(dev->phydev);
387 }
388
umac_reset(struct bcmasp_intf *intf)389 static void umac_reset(struct bcmasp_intf *intf)
390 {
391 umac_wl(intf, 0x0, UMC_CMD);
392 umac_wl(intf, UMC_CMD_SW_RESET, UMC_CMD);
393 usleep_range(10, 100);
394 umac_wl(intf, 0x0, UMC_CMD);
395 }
396
umac_set_hw_addr(struct bcmasp_intf *intf, const unsigned char *addr)397 static void umac_set_hw_addr(struct bcmasp_intf *intf,
398 const unsigned char *addr)
399 {
400 u32 mac0 = (addr[0] << 24) | (addr[1] << 16) | (addr[2] << 8) |
401 addr[3];
402 u32 mac1 = (addr[4] << 8) | addr[5];
403
404 umac_wl(intf, mac0, UMC_MAC0);
405 umac_wl(intf, mac1, UMC_MAC1);
406 }
407
umac_enable_set(struct bcmasp_intf *intf, u32 mask, unsigned int enable)408 static void umac_enable_set(struct bcmasp_intf *intf, u32 mask,
409 unsigned int enable)
410 {
411 u32 reg;
412
413 reg = umac_rl(intf, UMC_CMD);
414 if (enable)
415 reg |= mask;
416 else
417 reg &= ~mask;
418 umac_wl(intf, reg, UMC_CMD);
419
420 /* UniMAC stops on a packet boundary, wait for a full-sized packet
421 * to be processed (1 msec).
422 */
423 if (enable == 0)
424 usleep_range(1000, 2000);
425 }
426
umac_init(struct bcmasp_intf *intf)427 static void umac_init(struct bcmasp_intf *intf)
428 {
429 umac_wl(intf, 0x800, UMC_FRM_LEN);
430 umac_wl(intf, 0xffff, UMC_PAUSE_CNTRL);
431 umac_wl(intf, 0x800, UMC_RX_MAX_PKT_SZ);
432 umac_enable_set(intf, UMC_CMD_PROMISC, 1);
433 }
434
bcmasp_tx_poll(struct napi_struct *napi, int budget)435 static int bcmasp_tx_poll(struct napi_struct *napi, int budget)
436 {
437 struct bcmasp_intf *intf =
438 container_of(napi, struct bcmasp_intf, tx_napi);
439 struct bcmasp_intf_stats64 *stats = &intf->stats64;
440 struct device *kdev = &intf->parent->pdev->dev;
441 unsigned long read, released = 0;
442 struct bcmasp_tx_cb *txcb;
443 struct bcmasp_desc *desc;
444 dma_addr_t mapping;
445
446 read = bcmasp_intf_tx_read(intf);
447 while (intf->tx_spb_dma_read != read) {
448 txcb = &intf->tx_cbs[intf->tx_spb_clean_index];
449 mapping = dma_unmap_addr(txcb, dma_addr);
450
451 dma_unmap_single(kdev, mapping,
452 dma_unmap_len(txcb, dma_len),
453 DMA_TO_DEVICE);
454
455 if (txcb->last) {
456 dev_consume_skb_any(txcb->skb);
457
458 u64_stats_update_begin(&stats->syncp);
459 u64_stats_inc(&stats->tx_packets);
460 u64_stats_add(&stats->tx_bytes, txcb->bytes_sent);
461 u64_stats_update_end(&stats->syncp);
462 }
463
464 desc = &intf->tx_spb_cpu[intf->tx_spb_clean_index];
465
466 netif_dbg(intf, tx_done, intf->ndev,
467 "%s dma_buf=%pad dma_len=0x%x flags=0x%x c_index=0x%x\n",
468 __func__, &mapping, desc->size, desc->flags,
469 intf->tx_spb_clean_index);
470
471 bcmasp_clean_txcb(intf, intf->tx_spb_clean_index);
472 released++;
473
474 intf->tx_spb_clean_index = incr_ring(intf->tx_spb_clean_index,
475 DESC_RING_COUNT);
476 intf->tx_spb_dma_read = incr_first_byte(intf->tx_spb_dma_read,
477 intf->tx_spb_dma_addr,
478 DESC_RING_COUNT);
479 }
480
481 /* Ensure all descriptors have been written to DRAM for the hardware
482 * to see updated contents.
483 */
484 wmb();
485
486 napi_complete(&intf->tx_napi);
487
488 bcmasp_enable_tx_irq(intf, 1);
489
490 if (released)
491 netif_wake_queue(intf->ndev);
492
493 return 0;
494 }
495
bcmasp_rx_poll(struct napi_struct *napi, int budget)496 static int bcmasp_rx_poll(struct napi_struct *napi, int budget)
497 {
498 struct bcmasp_intf *intf =
499 container_of(napi, struct bcmasp_intf, rx_napi);
500 struct bcmasp_intf_stats64 *stats = &intf->stats64;
501 struct device *kdev = &intf->parent->pdev->dev;
502 unsigned long processed = 0;
503 struct bcmasp_desc *desc;
504 struct sk_buff *skb;
505 dma_addr_t valid;
506 void *data;
507 u64 flags;
508 u32 len;
509
510 valid = bcmasp_intf_rx_desc_read(intf) + 1;
511 if (valid == intf->rx_edpkt_dma_addr + DESC_RING_SIZE)
512 valid = intf->rx_edpkt_dma_addr;
513
514 while ((processed < budget) && (valid != intf->rx_edpkt_dma_read)) {
515 desc = &intf->rx_edpkt_cpu[intf->rx_edpkt_index];
516
517 /* Ensure that descriptor has been fully written to DRAM by
518 * hardware before reading by the CPU
519 */
520 rmb();
521
522 /* Calculate virt addr by offsetting from physical addr */
523 data = intf->rx_ring_cpu +
524 (DESC_ADDR(desc->buf) - intf->rx_ring_dma);
525
526 flags = DESC_FLAGS(desc->buf);
527 if (unlikely(flags & (DESC_CRC_ERR | DESC_RX_SYM_ERR))) {
528 if (net_ratelimit()) {
529 netif_err(intf, rx_status, intf->ndev,
530 "flags=0x%llx\n", flags);
531 }
532
533 u64_stats_update_begin(&stats->syncp);
534 if (flags & DESC_CRC_ERR)
535 u64_stats_inc(&stats->rx_crc_errs);
536 if (flags & DESC_RX_SYM_ERR)
537 u64_stats_inc(&stats->rx_sym_errs);
538 u64_stats_update_end(&stats->syncp);
539
540 goto next;
541 }
542
543 dma_sync_single_for_cpu(kdev, DESC_ADDR(desc->buf), desc->size,
544 DMA_FROM_DEVICE);
545
546 len = desc->size;
547
548 skb = napi_alloc_skb(napi, len);
549 if (!skb) {
550 u64_stats_update_begin(&stats->syncp);
551 u64_stats_inc(&stats->rx_dropped);
552 u64_stats_update_end(&stats->syncp);
553 intf->mib.alloc_rx_skb_failed++;
554
555 goto next;
556 }
557
558 skb_put(skb, len);
559 memcpy(skb->data, data, len);
560
561 skb_pull(skb, 2);
562 len -= 2;
563 if (likely(intf->crc_fwd)) {
564 skb_trim(skb, len - ETH_FCS_LEN);
565 len -= ETH_FCS_LEN;
566 }
567
568 if ((intf->ndev->features & NETIF_F_RXCSUM) &&
569 (desc->buf & DESC_CHKSUM))
570 skb->ip_summed = CHECKSUM_UNNECESSARY;
571
572 skb->protocol = eth_type_trans(skb, intf->ndev);
573
574 napi_gro_receive(napi, skb);
575
576 u64_stats_update_begin(&stats->syncp);
577 u64_stats_inc(&stats->rx_packets);
578 u64_stats_add(&stats->rx_bytes, len);
579 u64_stats_update_end(&stats->syncp);
580
581 next:
582 bcmasp_intf_rx_buffer_write(intf, (DESC_ADDR(desc->buf) +
583 desc->size));
584
585 processed++;
586 intf->rx_edpkt_dma_read =
587 incr_first_byte(intf->rx_edpkt_dma_read,
588 intf->rx_edpkt_dma_addr,
589 DESC_RING_COUNT);
590 intf->rx_edpkt_index = incr_ring(intf->rx_edpkt_index,
591 DESC_RING_COUNT);
592 }
593
594 bcmasp_intf_rx_desc_write(intf, intf->rx_edpkt_dma_read);
595
596 if (processed < budget) {
597 napi_complete_done(&intf->rx_napi, processed);
598 bcmasp_enable_rx_irq(intf, 1);
599 }
600
601 return processed;
602 }
603
bcmasp_adj_link(struct net_device *dev)604 static void bcmasp_adj_link(struct net_device *dev)
605 {
606 struct bcmasp_intf *intf = netdev_priv(dev);
607 struct phy_device *phydev = dev->phydev;
608 u32 cmd_bits = 0, reg;
609 int changed = 0;
610
611 if (intf->old_link != phydev->link) {
612 changed = 1;
613 intf->old_link = phydev->link;
614 }
615
616 if (intf->old_duplex != phydev->duplex) {
617 changed = 1;
618 intf->old_duplex = phydev->duplex;
619 }
620
621 switch (phydev->speed) {
622 case SPEED_2500:
623 cmd_bits = UMC_CMD_SPEED_2500;
624 break;
625 case SPEED_1000:
626 cmd_bits = UMC_CMD_SPEED_1000;
627 break;
628 case SPEED_100:
629 cmd_bits = UMC_CMD_SPEED_100;
630 break;
631 case SPEED_10:
632 cmd_bits = UMC_CMD_SPEED_10;
633 break;
634 default:
635 break;
636 }
637 cmd_bits <<= UMC_CMD_SPEED_SHIFT;
638
639 if (phydev->duplex == DUPLEX_HALF)
640 cmd_bits |= UMC_CMD_HD_EN;
641
642 if (intf->old_pause != phydev->pause) {
643 changed = 1;
644 intf->old_pause = phydev->pause;
645 }
646
647 if (!phydev->pause)
648 cmd_bits |= UMC_CMD_RX_PAUSE_IGNORE | UMC_CMD_TX_PAUSE_IGNORE;
649
650 if (!changed)
651 return;
652
653 if (phydev->link) {
654 reg = umac_rl(intf, UMC_CMD);
655 reg &= ~((UMC_CMD_SPEED_MASK << UMC_CMD_SPEED_SHIFT) |
656 UMC_CMD_HD_EN | UMC_CMD_RX_PAUSE_IGNORE |
657 UMC_CMD_TX_PAUSE_IGNORE);
658 reg |= cmd_bits;
659 umac_wl(intf, reg, UMC_CMD);
660
661 intf->eee.eee_active = phy_init_eee(phydev, 0) >= 0;
662 bcmasp_eee_enable_set(intf, intf->eee.eee_active);
663 }
664
665 reg = rgmii_rl(intf, RGMII_OOB_CNTRL);
666 if (phydev->link)
667 reg |= RGMII_LINK;
668 else
669 reg &= ~RGMII_LINK;
670 rgmii_wl(intf, reg, RGMII_OOB_CNTRL);
671
672 if (changed)
673 phy_print_status(phydev);
674 }
675
bcmasp_init_rx(struct bcmasp_intf *intf)676 static int bcmasp_init_rx(struct bcmasp_intf *intf)
677 {
678 struct device *kdev = &intf->parent->pdev->dev;
679 struct page *buffer_pg;
680 dma_addr_t dma;
681 void *p;
682 u32 reg;
683 int ret;
684
685 intf->rx_buf_order = get_order(RING_BUFFER_SIZE);
686 buffer_pg = alloc_pages(GFP_KERNEL, intf->rx_buf_order);
687
688 dma = dma_map_page(kdev, buffer_pg, 0, RING_BUFFER_SIZE,
689 DMA_FROM_DEVICE);
690 if (dma_mapping_error(kdev, dma)) {
691 __free_pages(buffer_pg, intf->rx_buf_order);
692 return -ENOMEM;
693 }
694 intf->rx_ring_cpu = page_to_virt(buffer_pg);
695 intf->rx_ring_dma = dma;
696 intf->rx_ring_dma_valid = intf->rx_ring_dma + RING_BUFFER_SIZE - 1;
697
698 p = dma_alloc_coherent(kdev, DESC_RING_SIZE, &intf->rx_edpkt_dma_addr,
699 GFP_KERNEL);
700 if (!p) {
701 ret = -ENOMEM;
702 goto free_rx_ring;
703 }
704 intf->rx_edpkt_cpu = p;
705
706 netif_napi_add(intf->ndev, &intf->rx_napi, bcmasp_rx_poll);
707
708 intf->rx_edpkt_dma_read = intf->rx_edpkt_dma_addr;
709 intf->rx_edpkt_index = 0;
710
711 /* Make sure channels are disabled */
712 rx_edpkt_cfg_wl(intf, 0x0, RX_EDPKT_CFG_ENABLE);
713
714 /* Rx SPB */
715 rx_edpkt_cfg_wq(intf, intf->rx_ring_dma, RX_EDPKT_RING_BUFFER_READ);
716 rx_edpkt_cfg_wq(intf, intf->rx_ring_dma, RX_EDPKT_RING_BUFFER_WRITE);
717 rx_edpkt_cfg_wq(intf, intf->rx_ring_dma, RX_EDPKT_RING_BUFFER_BASE);
718 rx_edpkt_cfg_wq(intf, intf->rx_ring_dma_valid,
719 RX_EDPKT_RING_BUFFER_END);
720 rx_edpkt_cfg_wq(intf, intf->rx_ring_dma_valid,
721 RX_EDPKT_RING_BUFFER_VALID);
722
723 /* EDPKT */
724 rx_edpkt_cfg_wl(intf, (RX_EDPKT_CFG_CFG0_RBUF_4K <<
725 RX_EDPKT_CFG_CFG0_DBUF_SHIFT) |
726 (RX_EDPKT_CFG_CFG0_64_ALN <<
727 RX_EDPKT_CFG_CFG0_BALN_SHIFT) |
728 (RX_EDPKT_CFG_CFG0_EFRM_STUF),
729 RX_EDPKT_CFG_CFG0);
730 rx_edpkt_dma_wq(intf, intf->rx_edpkt_dma_addr, RX_EDPKT_DMA_WRITE);
731 rx_edpkt_dma_wq(intf, intf->rx_edpkt_dma_addr, RX_EDPKT_DMA_READ);
732 rx_edpkt_dma_wq(intf, intf->rx_edpkt_dma_addr, RX_EDPKT_DMA_BASE);
733 rx_edpkt_dma_wq(intf, intf->rx_edpkt_dma_addr + (DESC_RING_SIZE - 1),
734 RX_EDPKT_DMA_END);
735 rx_edpkt_dma_wq(intf, intf->rx_edpkt_dma_addr + (DESC_RING_SIZE - 1),
736 RX_EDPKT_DMA_VALID);
737
738 reg = UMAC2FB_CFG_DEFAULT_EN |
739 ((intf->channel + 11) << UMAC2FB_CFG_CHID_SHIFT);
740 reg |= (0xd << UMAC2FB_CFG_OK_SEND_SHIFT);
741 umac2fb_wl(intf, reg, UMAC2FB_CFG);
742
743 return 0;
744
745 free_rx_ring:
746 dma_unmap_page(kdev, intf->rx_ring_dma, RING_BUFFER_SIZE,
747 DMA_FROM_DEVICE);
748 __free_pages(virt_to_page(intf->rx_ring_cpu), intf->rx_buf_order);
749
750 return ret;
751 }
752
bcmasp_reclaim_free_all_rx(struct bcmasp_intf *intf)753 static void bcmasp_reclaim_free_all_rx(struct bcmasp_intf *intf)
754 {
755 struct device *kdev = &intf->parent->pdev->dev;
756
757 dma_free_coherent(kdev, DESC_RING_SIZE, intf->rx_edpkt_cpu,
758 intf->rx_edpkt_dma_addr);
759 dma_unmap_page(kdev, intf->rx_ring_dma, RING_BUFFER_SIZE,
760 DMA_FROM_DEVICE);
761 __free_pages(virt_to_page(intf->rx_ring_cpu), intf->rx_buf_order);
762 }
763
bcmasp_init_tx(struct bcmasp_intf *intf)764 static int bcmasp_init_tx(struct bcmasp_intf *intf)
765 {
766 struct device *kdev = &intf->parent->pdev->dev;
767 void *p;
768 int ret;
769
770 p = dma_alloc_coherent(kdev, DESC_RING_SIZE, &intf->tx_spb_dma_addr,
771 GFP_KERNEL);
772 if (!p)
773 return -ENOMEM;
774
775 intf->tx_spb_cpu = p;
776 intf->tx_spb_dma_valid = intf->tx_spb_dma_addr + DESC_RING_SIZE - 1;
777 intf->tx_spb_dma_read = intf->tx_spb_dma_addr;
778
779 intf->tx_cbs = kcalloc(DESC_RING_COUNT, sizeof(struct bcmasp_tx_cb),
780 GFP_KERNEL);
781 if (!intf->tx_cbs) {
782 ret = -ENOMEM;
783 goto free_tx_spb;
784 }
785
786 intf->tx_spb_index = 0;
787 intf->tx_spb_clean_index = 0;
788
789 netif_napi_add_tx(intf->ndev, &intf->tx_napi, bcmasp_tx_poll);
790
791 /* Make sure channels are disabled */
792 tx_spb_ctrl_wl(intf, 0x0, TX_SPB_CTRL_ENABLE);
793 tx_epkt_core_wl(intf, 0x0, TX_EPKT_C_CFG_MISC);
794
795 /* Tx SPB */
796 tx_spb_ctrl_wl(intf, ((intf->channel + 8) << TX_SPB_CTRL_XF_BID_SHIFT),
797 TX_SPB_CTRL_XF_CTRL2);
798 tx_pause_ctrl_wl(intf, (1 << (intf->channel + 8)), TX_PAUSE_MAP_VECTOR);
799 tx_spb_top_wl(intf, 0x1e, TX_SPB_TOP_BLKOUT);
800 tx_spb_top_wl(intf, 0x0, TX_SPB_TOP_SPRE_BW_CTRL);
801
802 tx_spb_dma_wq(intf, intf->tx_spb_dma_addr, TX_SPB_DMA_READ);
803 tx_spb_dma_wq(intf, intf->tx_spb_dma_addr, TX_SPB_DMA_BASE);
804 tx_spb_dma_wq(intf, intf->tx_spb_dma_valid, TX_SPB_DMA_END);
805 tx_spb_dma_wq(intf, intf->tx_spb_dma_valid, TX_SPB_DMA_VALID);
806
807 return 0;
808
809 free_tx_spb:
810 dma_free_coherent(kdev, DESC_RING_SIZE, intf->tx_spb_cpu,
811 intf->tx_spb_dma_addr);
812
813 return ret;
814 }
815
bcmasp_reclaim_free_all_tx(struct bcmasp_intf *intf)816 static void bcmasp_reclaim_free_all_tx(struct bcmasp_intf *intf)
817 {
818 struct device *kdev = &intf->parent->pdev->dev;
819
820 /* Free descriptors */
821 dma_free_coherent(kdev, DESC_RING_SIZE, intf->tx_spb_cpu,
822 intf->tx_spb_dma_addr);
823
824 /* Free cbs */
825 kfree(intf->tx_cbs);
826 }
827
bcmasp_ephy_enable_set(struct bcmasp_intf *intf, bool enable)828 static void bcmasp_ephy_enable_set(struct bcmasp_intf *intf, bool enable)
829 {
830 u32 mask = RGMII_EPHY_CFG_IDDQ_BIAS | RGMII_EPHY_CFG_EXT_PWRDOWN |
831 RGMII_EPHY_CFG_IDDQ_GLOBAL;
832 u32 reg;
833
834 reg = rgmii_rl(intf, RGMII_EPHY_CNTRL);
835 if (enable) {
836 reg &= ~RGMII_EPHY_CK25_DIS;
837 rgmii_wl(intf, reg, RGMII_EPHY_CNTRL);
838 mdelay(1);
839
840 reg &= ~mask;
841 reg |= RGMII_EPHY_RESET;
842 rgmii_wl(intf, reg, RGMII_EPHY_CNTRL);
843 mdelay(1);
844
845 reg &= ~RGMII_EPHY_RESET;
846 } else {
847 reg |= mask | RGMII_EPHY_RESET;
848 rgmii_wl(intf, reg, RGMII_EPHY_CNTRL);
849 mdelay(1);
850 reg |= RGMII_EPHY_CK25_DIS;
851 }
852 rgmii_wl(intf, reg, RGMII_EPHY_CNTRL);
853 mdelay(1);
854
855 /* Set or clear the LED control override to avoid lighting up LEDs
856 * while the EPHY is powered off and drawing unnecessary current.
857 */
858 reg = rgmii_rl(intf, RGMII_SYS_LED_CNTRL);
859 if (enable)
860 reg &= ~RGMII_SYS_LED_CNTRL_LINK_OVRD;
861 else
862 reg |= RGMII_SYS_LED_CNTRL_LINK_OVRD;
863 rgmii_wl(intf, reg, RGMII_SYS_LED_CNTRL);
864 }
865
bcmasp_rgmii_mode_en_set(struct bcmasp_intf *intf, bool enable)866 static void bcmasp_rgmii_mode_en_set(struct bcmasp_intf *intf, bool enable)
867 {
868 u32 reg;
869
870 reg = rgmii_rl(intf, RGMII_OOB_CNTRL);
871 reg &= ~RGMII_OOB_DIS;
872 if (enable)
873 reg |= RGMII_MODE_EN;
874 else
875 reg &= ~RGMII_MODE_EN;
876 rgmii_wl(intf, reg, RGMII_OOB_CNTRL);
877 }
878
bcmasp_netif_deinit(struct net_device *dev)879 static void bcmasp_netif_deinit(struct net_device *dev)
880 {
881 struct bcmasp_intf *intf = netdev_priv(dev);
882 u32 reg, timeout = 1000;
883
884 napi_disable(&intf->tx_napi);
885
886 bcmasp_enable_tx(intf, 0);
887
888 /* Flush any TX packets in the pipe */
889 tx_spb_dma_wl(intf, TX_SPB_DMA_FIFO_FLUSH, TX_SPB_DMA_FIFO_CTRL);
890 do {
891 reg = tx_spb_dma_rl(intf, TX_SPB_DMA_FIFO_STATUS);
892 if (!(reg & TX_SPB_DMA_FIFO_FLUSH))
893 break;
894 usleep_range(1000, 2000);
895 } while (timeout-- > 0);
896 tx_spb_dma_wl(intf, 0x0, TX_SPB_DMA_FIFO_CTRL);
897
898 umac_enable_set(intf, UMC_CMD_TX_EN, 0);
899
900 phy_stop(dev->phydev);
901
902 umac_enable_set(intf, UMC_CMD_RX_EN, 0);
903
904 bcmasp_flush_rx_port(intf);
905 usleep_range(1000, 2000);
906 bcmasp_enable_rx(intf, 0);
907
908 napi_disable(&intf->rx_napi);
909
910 /* Disable interrupts */
911 bcmasp_enable_tx_irq(intf, 0);
912 bcmasp_enable_rx_irq(intf, 0);
913
914 netif_napi_del(&intf->tx_napi);
915 bcmasp_reclaim_free_all_tx(intf);
916
917 netif_napi_del(&intf->rx_napi);
918 bcmasp_reclaim_free_all_rx(intf);
919 }
920
bcmasp_stop(struct net_device *dev)921 static int bcmasp_stop(struct net_device *dev)
922 {
923 struct bcmasp_intf *intf = netdev_priv(dev);
924
925 netif_dbg(intf, ifdown, dev, "bcmasp stop\n");
926
927 /* Stop tx from updating HW */
928 netif_tx_disable(dev);
929
930 bcmasp_netif_deinit(dev);
931
932 phy_disconnect(dev->phydev);
933
934 /* Disable internal EPHY or external PHY */
935 if (intf->internal_phy)
936 bcmasp_ephy_enable_set(intf, false);
937 else
938 bcmasp_rgmii_mode_en_set(intf, false);
939
940 /* Disable the interface clocks */
941 bcmasp_core_clock_set_intf(intf, false);
942
943 clk_disable_unprepare(intf->parent->clk);
944
945 return 0;
946 }
947
bcmasp_configure_port(struct bcmasp_intf *intf)948 static void bcmasp_configure_port(struct bcmasp_intf *intf)
949 {
950 u32 reg, id_mode_dis = 0;
951
952 reg = rgmii_rl(intf, RGMII_PORT_CNTRL);
953 reg &= ~RGMII_PORT_MODE_MASK;
954
955 switch (intf->phy_interface) {
956 case PHY_INTERFACE_MODE_RGMII:
957 /* RGMII_NO_ID: TXC transitions at the same time as TXD
958 * (requires PCB or receiver-side delay)
959 * RGMII: Add 2ns delay on TXC (90 degree shift)
960 *
961 * ID is implicitly disabled for 100Mbps (RG)MII operation.
962 */
963 id_mode_dis = RGMII_ID_MODE_DIS;
964 fallthrough;
965 case PHY_INTERFACE_MODE_RGMII_TXID:
966 reg |= RGMII_PORT_MODE_EXT_GPHY;
967 break;
968 case PHY_INTERFACE_MODE_MII:
969 reg |= RGMII_PORT_MODE_EXT_EPHY;
970 break;
971 default:
972 break;
973 }
974
975 if (intf->internal_phy)
976 reg |= RGMII_PORT_MODE_EPHY;
977
978 rgmii_wl(intf, reg, RGMII_PORT_CNTRL);
979
980 reg = rgmii_rl(intf, RGMII_OOB_CNTRL);
981 reg &= ~RGMII_ID_MODE_DIS;
982 reg |= id_mode_dis;
983 rgmii_wl(intf, reg, RGMII_OOB_CNTRL);
984 }
985
bcmasp_netif_init(struct net_device *dev, bool phy_connect)986 static int bcmasp_netif_init(struct net_device *dev, bool phy_connect)
987 {
988 struct bcmasp_intf *intf = netdev_priv(dev);
989 phy_interface_t phy_iface = intf->phy_interface;
990 u32 phy_flags = PHY_BRCM_AUTO_PWRDWN_ENABLE |
991 PHY_BRCM_DIS_TXCRXC_NOENRGY |
992 PHY_BRCM_IDDQ_SUSPEND;
993 struct phy_device *phydev = NULL;
994 int ret;
995
996 /* Always enable interface clocks */
997 bcmasp_core_clock_set_intf(intf, true);
998
999 /* Enable internal PHY or external PHY before any MAC activity */
1000 if (intf->internal_phy)
1001 bcmasp_ephy_enable_set(intf, true);
1002 else
1003 bcmasp_rgmii_mode_en_set(intf, true);
1004 bcmasp_configure_port(intf);
1005
1006 /* This is an ugly quirk but we have not been correctly
1007 * interpreting the phy_interface values and we have done that
1008 * across different drivers, so at least we are consistent in
1009 * our mistakes.
1010 *
1011 * When the Generic PHY driver is in use either the PHY has
1012 * been strapped or programmed correctly by the boot loader so
1013 * we should stick to our incorrect interpretation since we
1014 * have validated it.
1015 *
1016 * Now when a dedicated PHY driver is in use, we need to
1017 * reverse the meaning of the phy_interface_mode values to
1018 * something that the PHY driver will interpret and act on such
1019 * that we have two mistakes canceling themselves so to speak.
1020 * We only do this for the two modes that GENET driver
1021 * officially supports on Broadcom STB chips:
1022 * PHY_INTERFACE_MODE_RGMII and PHY_INTERFACE_MODE_RGMII_TXID.
1023 * Other modes are not *officially* supported with the boot
1024 * loader and the scripted environment generating Device Tree
1025 * blobs for those platforms.
1026 *
1027 * Note that internal PHY and fixed-link configurations are not
1028 * affected because they use different phy_interface_t values
1029 * or the Generic PHY driver.
1030 */
1031 switch (phy_iface) {
1032 case PHY_INTERFACE_MODE_RGMII:
1033 phy_iface = PHY_INTERFACE_MODE_RGMII_ID;
1034 break;
1035 case PHY_INTERFACE_MODE_RGMII_TXID:
1036 phy_iface = PHY_INTERFACE_MODE_RGMII_RXID;
1037 break;
1038 default:
1039 break;
1040 }
1041
1042 if (phy_connect) {
1043 phydev = of_phy_connect(dev, intf->phy_dn,
1044 bcmasp_adj_link, phy_flags,
1045 phy_iface);
1046 if (!phydev) {
1047 ret = -ENODEV;
1048 netdev_err(dev, "could not attach to PHY\n");
1049 goto err_phy_disable;
1050 }
1051
1052 /* Indicate that the MAC is responsible for PHY PM */
1053 phydev->mac_managed_pm = true;
1054 } else if (!intf->wolopts) {
1055 ret = phy_resume(dev->phydev);
1056 if (ret)
1057 goto err_phy_disable;
1058 }
1059
1060 umac_reset(intf);
1061
1062 umac_init(intf);
1063
1064 /* Disable the UniMAC RX/TX */
1065 umac_enable_set(intf, (UMC_CMD_RX_EN | UMC_CMD_TX_EN), 0);
1066
1067 umac_set_hw_addr(intf, dev->dev_addr);
1068
1069 intf->old_duplex = -1;
1070 intf->old_link = -1;
1071 intf->old_pause = -1;
1072
1073 ret = bcmasp_init_tx(intf);
1074 if (ret)
1075 goto err_phy_disconnect;
1076
1077 /* Turn on asp */
1078 bcmasp_enable_tx(intf, 1);
1079
1080 ret = bcmasp_init_rx(intf);
1081 if (ret)
1082 goto err_reclaim_tx;
1083
1084 bcmasp_enable_rx(intf, 1);
1085
1086 /* Turn on UniMAC TX/RX */
1087 umac_enable_set(intf, (UMC_CMD_RX_EN | UMC_CMD_TX_EN), 1);
1088
1089 intf->crc_fwd = !!(umac_rl(intf, UMC_CMD) & UMC_CMD_CRC_FWD);
1090
1091 bcmasp_netif_start(dev);
1092
1093 netif_start_queue(dev);
1094
1095 return 0;
1096
1097 err_reclaim_tx:
1098 bcmasp_reclaim_free_all_tx(intf);
1099 err_phy_disconnect:
1100 if (phydev)
1101 phy_disconnect(phydev);
1102 err_phy_disable:
1103 if (intf->internal_phy)
1104 bcmasp_ephy_enable_set(intf, false);
1105 else
1106 bcmasp_rgmii_mode_en_set(intf, false);
1107 return ret;
1108 }
1109
bcmasp_open(struct net_device *dev)1110 static int bcmasp_open(struct net_device *dev)
1111 {
1112 struct bcmasp_intf *intf = netdev_priv(dev);
1113 int ret;
1114
1115 netif_dbg(intf, ifup, dev, "bcmasp open\n");
1116
1117 ret = clk_prepare_enable(intf->parent->clk);
1118 if (ret)
1119 return ret;
1120
1121 ret = bcmasp_netif_init(dev, true);
1122 if (ret)
1123 clk_disable_unprepare(intf->parent->clk);
1124
1125 return ret;
1126 }
1127
bcmasp_tx_timeout(struct net_device *dev, unsigned int txqueue)1128 static void bcmasp_tx_timeout(struct net_device *dev, unsigned int txqueue)
1129 {
1130 struct bcmasp_intf *intf = netdev_priv(dev);
1131
1132 netif_dbg(intf, tx_err, dev, "transmit timeout!\n");
1133 intf->mib.tx_timeout_cnt++;
1134 }
1135
bcmasp_get_phys_port_name(struct net_device *dev, char *name, size_t len)1136 static int bcmasp_get_phys_port_name(struct net_device *dev,
1137 char *name, size_t len)
1138 {
1139 struct bcmasp_intf *intf = netdev_priv(dev);
1140
1141 if (snprintf(name, len, "p%d", intf->port) >= len)
1142 return -EINVAL;
1143
1144 return 0;
1145 }
1146
bcmasp_get_stats64(struct net_device *dev, struct rtnl_link_stats64 *stats)1147 static void bcmasp_get_stats64(struct net_device *dev,
1148 struct rtnl_link_stats64 *stats)
1149 {
1150 struct bcmasp_intf *intf = netdev_priv(dev);
1151 struct bcmasp_intf_stats64 *lstats;
1152 unsigned int start;
1153
1154 lstats = &intf->stats64;
1155
1156 do {
1157 start = u64_stats_fetch_begin(&lstats->syncp);
1158 stats->rx_packets = u64_stats_read(&lstats->rx_packets);
1159 stats->rx_bytes = u64_stats_read(&lstats->rx_bytes);
1160 stats->rx_dropped = u64_stats_read(&lstats->rx_dropped);
1161 stats->rx_crc_errors = u64_stats_read(&lstats->rx_crc_errs);
1162 stats->rx_frame_errors = u64_stats_read(&lstats->rx_sym_errs);
1163 stats->rx_errors = stats->rx_crc_errors + stats->rx_frame_errors;
1164
1165 stats->tx_packets = u64_stats_read(&lstats->tx_packets);
1166 stats->tx_bytes = u64_stats_read(&lstats->tx_bytes);
1167 } while (u64_stats_fetch_retry(&lstats->syncp, start));
1168 }
1169
1170 static const struct net_device_ops bcmasp_netdev_ops = {
1171 .ndo_open = bcmasp_open,
1172 .ndo_stop = bcmasp_stop,
1173 .ndo_start_xmit = bcmasp_xmit,
1174 .ndo_tx_timeout = bcmasp_tx_timeout,
1175 .ndo_set_rx_mode = bcmasp_set_rx_mode,
1176 .ndo_get_phys_port_name = bcmasp_get_phys_port_name,
1177 .ndo_eth_ioctl = phy_do_ioctl_running,
1178 .ndo_set_mac_address = eth_mac_addr,
1179 .ndo_get_stats64 = bcmasp_get_stats64,
1180 };
1181
bcmasp_map_res(struct bcmasp_priv *priv, struct bcmasp_intf *intf)1182 static void bcmasp_map_res(struct bcmasp_priv *priv, struct bcmasp_intf *intf)
1183 {
1184 /* Per port */
1185 intf->res.umac = priv->base + UMC_OFFSET(intf);
1186 intf->res.umac2fb = priv->base + (priv->hw_info->umac2fb +
1187 (intf->port * 0x4));
1188 intf->res.rgmii = priv->base + RGMII_OFFSET(intf);
1189
1190 /* Per ch */
1191 intf->tx_spb_dma = priv->base + TX_SPB_DMA_OFFSET(intf);
1192 intf->res.tx_spb_ctrl = priv->base + TX_SPB_CTRL_OFFSET(intf);
1193 intf->res.tx_spb_top = priv->base + TX_SPB_TOP_OFFSET(intf);
1194 intf->res.tx_epkt_core = priv->base + TX_EPKT_C_OFFSET(intf);
1195 intf->res.tx_pause_ctrl = priv->base + TX_PAUSE_CTRL_OFFSET(intf);
1196
1197 intf->rx_edpkt_dma = priv->base + RX_EDPKT_DMA_OFFSET(intf);
1198 intf->rx_edpkt_cfg = priv->base + RX_EDPKT_CFG_OFFSET(intf);
1199 }
1200
1201 #define MAX_IRQ_STR_LEN 64
bcmasp_interface_create(struct bcmasp_priv *priv, struct device_node *ndev_dn, int i)1202 struct bcmasp_intf *bcmasp_interface_create(struct bcmasp_priv *priv,
1203 struct device_node *ndev_dn, int i)
1204 {
1205 struct device *dev = &priv->pdev->dev;
1206 struct bcmasp_intf *intf;
1207 struct net_device *ndev;
1208 int ch, port, ret;
1209
1210 if (of_property_read_u32(ndev_dn, "reg", &port)) {
1211 dev_warn(dev, "%s: invalid port number\n", ndev_dn->name);
1212 goto err;
1213 }
1214
1215 if (of_property_read_u32(ndev_dn, "brcm,channel", &ch)) {
1216 dev_warn(dev, "%s: invalid ch number\n", ndev_dn->name);
1217 goto err;
1218 }
1219
1220 ndev = alloc_etherdev(sizeof(struct bcmasp_intf));
1221 if (!ndev) {
1222 dev_warn(dev, "%s: unable to alloc ndev\n", ndev_dn->name);
1223 goto err;
1224 }
1225 intf = netdev_priv(ndev);
1226
1227 intf->parent = priv;
1228 intf->ndev = ndev;
1229 intf->channel = ch;
1230 intf->port = port;
1231 intf->ndev_dn = ndev_dn;
1232 intf->index = i;
1233
1234 ret = of_get_phy_mode(ndev_dn, &intf->phy_interface);
1235 if (ret < 0) {
1236 dev_err(dev, "invalid PHY mode property\n");
1237 goto err_free_netdev;
1238 }
1239
1240 if (intf->phy_interface == PHY_INTERFACE_MODE_INTERNAL)
1241 intf->internal_phy = true;
1242
1243 intf->phy_dn = of_parse_phandle(ndev_dn, "phy-handle", 0);
1244 if (!intf->phy_dn && of_phy_is_fixed_link(ndev_dn)) {
1245 ret = of_phy_register_fixed_link(ndev_dn);
1246 if (ret) {
1247 dev_warn(dev, "%s: failed to register fixed PHY\n",
1248 ndev_dn->name);
1249 goto err_free_netdev;
1250 }
1251 intf->phy_dn = ndev_dn;
1252 }
1253
1254 /* Map resource */
1255 bcmasp_map_res(priv, intf);
1256
1257 if ((!phy_interface_mode_is_rgmii(intf->phy_interface) &&
1258 intf->phy_interface != PHY_INTERFACE_MODE_MII &&
1259 intf->phy_interface != PHY_INTERFACE_MODE_INTERNAL) ||
1260 (intf->port != 1 && intf->internal_phy)) {
1261 netdev_err(intf->ndev, "invalid PHY mode: %s for port %d\n",
1262 phy_modes(intf->phy_interface), intf->port);
1263 ret = -EINVAL;
1264 goto err_free_netdev;
1265 }
1266
1267 ret = of_get_ethdev_address(ndev_dn, ndev);
1268 if (ret) {
1269 netdev_warn(ndev, "using random Ethernet MAC\n");
1270 eth_hw_addr_random(ndev);
1271 }
1272
1273 SET_NETDEV_DEV(ndev, dev);
1274 intf->ops = &bcmasp_intf_ops;
1275 ndev->netdev_ops = &bcmasp_netdev_ops;
1276 ndev->ethtool_ops = &bcmasp_ethtool_ops;
1277 intf->msg_enable = netif_msg_init(-1, NETIF_MSG_DRV |
1278 NETIF_MSG_PROBE |
1279 NETIF_MSG_LINK);
1280 ndev->features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM | NETIF_F_SG |
1281 NETIF_F_RXCSUM;
1282 ndev->hw_features |= ndev->features;
1283 ndev->needed_headroom += sizeof(struct bcmasp_pkt_offload);
1284
1285 return intf;
1286
1287 err_free_netdev:
1288 free_netdev(ndev);
1289 err:
1290 return NULL;
1291 }
1292
bcmasp_interface_destroy(struct bcmasp_intf *intf)1293 void bcmasp_interface_destroy(struct bcmasp_intf *intf)
1294 {
1295 if (intf->ndev->reg_state == NETREG_REGISTERED)
1296 unregister_netdev(intf->ndev);
1297 if (of_phy_is_fixed_link(intf->ndev_dn))
1298 of_phy_deregister_fixed_link(intf->ndev_dn);
1299 free_netdev(intf->ndev);
1300 }
1301
bcmasp_suspend_to_wol(struct bcmasp_intf *intf)1302 static void bcmasp_suspend_to_wol(struct bcmasp_intf *intf)
1303 {
1304 struct net_device *ndev = intf->ndev;
1305 u32 reg;
1306
1307 reg = umac_rl(intf, UMC_MPD_CTRL);
1308 if (intf->wolopts & (WAKE_MAGIC | WAKE_MAGICSECURE))
1309 reg |= UMC_MPD_CTRL_MPD_EN;
1310 reg &= ~UMC_MPD_CTRL_PSW_EN;
1311 if (intf->wolopts & WAKE_MAGICSECURE) {
1312 /* Program the SecureOn password */
1313 umac_wl(intf, get_unaligned_be16(&intf->sopass[0]),
1314 UMC_PSW_MS);
1315 umac_wl(intf, get_unaligned_be32(&intf->sopass[2]),
1316 UMC_PSW_LS);
1317 reg |= UMC_MPD_CTRL_PSW_EN;
1318 }
1319 umac_wl(intf, reg, UMC_MPD_CTRL);
1320
1321 if (intf->wolopts & WAKE_FILTER)
1322 bcmasp_netfilt_suspend(intf);
1323
1324 /* UniMAC receive needs to be turned on */
1325 umac_enable_set(intf, UMC_CMD_RX_EN, 1);
1326
1327 if (intf->parent->wol_irq > 0) {
1328 wakeup_intr2_core_wl(intf->parent, 0xffffffff,
1329 ASP_WAKEUP_INTR2_MASK_CLEAR);
1330 }
1331
1332 netif_dbg(intf, wol, ndev, "entered WOL mode\n");
1333 }
1334
bcmasp_interface_suspend(struct bcmasp_intf *intf)1335 int bcmasp_interface_suspend(struct bcmasp_intf *intf)
1336 {
1337 struct device *kdev = &intf->parent->pdev->dev;
1338 struct net_device *dev = intf->ndev;
1339 int ret = 0;
1340
1341 if (!netif_running(dev))
1342 return 0;
1343
1344 netif_device_detach(dev);
1345
1346 bcmasp_netif_deinit(dev);
1347
1348 if (!intf->wolopts) {
1349 ret = phy_suspend(dev->phydev);
1350 if (ret)
1351 goto out;
1352
1353 if (intf->internal_phy)
1354 bcmasp_ephy_enable_set(intf, false);
1355 else
1356 bcmasp_rgmii_mode_en_set(intf, false);
1357
1358 /* If Wake-on-LAN is disabled, we can safely
1359 * disable the network interface clocks.
1360 */
1361 bcmasp_core_clock_set_intf(intf, false);
1362 }
1363
1364 if (device_may_wakeup(kdev) && intf->wolopts)
1365 bcmasp_suspend_to_wol(intf);
1366
1367 clk_disable_unprepare(intf->parent->clk);
1368
1369 return ret;
1370
1371 out:
1372 bcmasp_netif_init(dev, false);
1373 return ret;
1374 }
1375
bcmasp_resume_from_wol(struct bcmasp_intf *intf)1376 static void bcmasp_resume_from_wol(struct bcmasp_intf *intf)
1377 {
1378 u32 reg;
1379
1380 reg = umac_rl(intf, UMC_MPD_CTRL);
1381 reg &= ~UMC_MPD_CTRL_MPD_EN;
1382 umac_wl(intf, reg, UMC_MPD_CTRL);
1383
1384 if (intf->parent->wol_irq > 0) {
1385 wakeup_intr2_core_wl(intf->parent, 0xffffffff,
1386 ASP_WAKEUP_INTR2_MASK_SET);
1387 }
1388 }
1389
bcmasp_interface_resume(struct bcmasp_intf *intf)1390 int bcmasp_interface_resume(struct bcmasp_intf *intf)
1391 {
1392 struct net_device *dev = intf->ndev;
1393 int ret;
1394
1395 if (!netif_running(dev))
1396 return 0;
1397
1398 ret = clk_prepare_enable(intf->parent->clk);
1399 if (ret)
1400 return ret;
1401
1402 ret = bcmasp_netif_init(dev, false);
1403 if (ret)
1404 goto out;
1405
1406 bcmasp_resume_from_wol(intf);
1407
1408 if (intf->eee.eee_enabled)
1409 bcmasp_eee_enable_set(intf, true);
1410
1411 netif_device_attach(dev);
1412
1413 return 0;
1414
1415 out:
1416 clk_disable_unprepare(intf->parent->clk);
1417 return ret;
1418 }
1419