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net: hns: fixes the issue by using ethtool -s
[mirror_ubuntu-zesty-kernel.git] / drivers / net / ethernet / hisilicon / hns / hns_enet.c
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b5996f11 1/*
2 * Copyright (c) 2014-2015 Hisilicon Limited.
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
8 */
9
10#include <linux/clk.h>
11#include <linux/cpumask.h>
12#include <linux/etherdevice.h>
13#include <linux/if_vlan.h>
14#include <linux/interrupt.h>
15#include <linux/io.h>
16#include <linux/ip.h>
17#include <linux/ipv6.h>
18#include <linux/module.h>
19#include <linux/phy.h>
20#include <linux/platform_device.h>
21#include <linux/skbuff.h>
22
23#include "hnae.h"
24#include "hns_enet.h"
25
26#define NIC_MAX_Q_PER_VF 16
27#define HNS_NIC_TX_TIMEOUT (5 * HZ)
28
29#define SERVICE_TIMER_HZ (1 * HZ)
30
31#define NIC_TX_CLEAN_MAX_NUM 256
32#define NIC_RX_CLEAN_MAX_NUM 64
33
b5996f11 34#define RCB_IRQ_NOT_INITED 0
35#define RCB_IRQ_INITED 1
36
37static void fill_desc(struct hnae_ring *ring, void *priv,
38 int size, dma_addr_t dma, int frag_end,
39 int buf_num, enum hns_desc_type type)
40{
41 struct hnae_desc *desc = &ring->desc[ring->next_to_use];
42 struct hnae_desc_cb *desc_cb = &ring->desc_cb[ring->next_to_use];
43 struct sk_buff *skb;
44 __be16 protocol;
45 u32 ip_offset;
46 u32 asid_bufnum_pid = 0;
47 u32 flag_ipoffset = 0;
48
49 desc_cb->priv = priv;
50 desc_cb->length = size;
51 desc_cb->dma = dma;
52 desc_cb->type = type;
53
54 desc->addr = cpu_to_le64(dma);
55 desc->tx.send_size = cpu_to_le16((u16)size);
56
57 /*config bd buffer end */
58 flag_ipoffset |= 1 << HNS_TXD_VLD_B;
59
60 asid_bufnum_pid |= buf_num << HNS_TXD_BUFNUM_S;
61
62 if (type == DESC_TYPE_SKB) {
63 skb = (struct sk_buff *)priv;
64
65 if (skb->ip_summed == CHECKSUM_PARTIAL) {
66 protocol = skb->protocol;
67 ip_offset = ETH_HLEN;
68
69 /*if it is a SW VLAN check the next protocol*/
70 if (protocol == htons(ETH_P_8021Q)) {
71 ip_offset += VLAN_HLEN;
72 protocol = vlan_get_protocol(skb);
73 skb->protocol = protocol;
74 }
75
76 if (skb->protocol == htons(ETH_P_IP)) {
77 flag_ipoffset |= 1 << HNS_TXD_L3CS_B;
78 /* check for tcp/udp header */
79 flag_ipoffset |= 1 << HNS_TXD_L4CS_B;
80
81 } else if (skb->protocol == htons(ETH_P_IPV6)) {
82 /* ipv6 has not l3 cs, check for L4 header */
83 flag_ipoffset |= 1 << HNS_TXD_L4CS_B;
84 }
85
86 flag_ipoffset |= ip_offset << HNS_TXD_IPOFFSET_S;
87 }
88 }
89
90 flag_ipoffset |= frag_end << HNS_TXD_FE_B;
91
92 desc->tx.asid_bufnum_pid = cpu_to_le16(asid_bufnum_pid);
93 desc->tx.flag_ipoffset = cpu_to_le32(flag_ipoffset);
94
95 ring_ptr_move_fw(ring, next_to_use);
96}
97
98static void unfill_desc(struct hnae_ring *ring)
99{
100 ring_ptr_move_bw(ring, next_to_use);
101}
102
103int hns_nic_net_xmit_hw(struct net_device *ndev,
104 struct sk_buff *skb,
105 struct hns_nic_ring_data *ring_data)
106{
107 struct hns_nic_priv *priv = netdev_priv(ndev);
108 struct device *dev = priv->dev;
109 struct hnae_ring *ring = ring_data->ring;
110 struct netdev_queue *dev_queue;
111 struct skb_frag_struct *frag;
112 int buf_num;
113 dma_addr_t dma;
114 int size, next_to_use;
115 int i, j;
116 struct sk_buff *new_skb;
117
118 assert(ring->max_desc_num_per_pkt <= ring->desc_num);
119
120 /* no. of segments (plus a header) */
121 buf_num = skb_shinfo(skb)->nr_frags + 1;
122
123 if (unlikely(buf_num > ring->max_desc_num_per_pkt)) {
124 if (ring_space(ring) < 1) {
125 ring->stats.tx_busy++;
126 goto out_net_tx_busy;
127 }
128
129 new_skb = skb_copy(skb, GFP_ATOMIC);
130 if (!new_skb) {
131 ring->stats.sw_err_cnt++;
132 netdev_err(ndev, "no memory to xmit!\n");
133 goto out_err_tx_ok;
134 }
135
136 dev_kfree_skb_any(skb);
137 skb = new_skb;
138 buf_num = 1;
139 assert(skb_shinfo(skb)->nr_frags == 1);
140 } else if (buf_num > ring_space(ring)) {
141 ring->stats.tx_busy++;
142 goto out_net_tx_busy;
143 }
144 next_to_use = ring->next_to_use;
145
146 /* fill the first part */
147 size = skb_headlen(skb);
148 dma = dma_map_single(dev, skb->data, size, DMA_TO_DEVICE);
149 if (dma_mapping_error(dev, dma)) {
150 netdev_err(ndev, "TX head DMA map failed\n");
151 ring->stats.sw_err_cnt++;
152 goto out_err_tx_ok;
153 }
154 fill_desc(ring, skb, size, dma, buf_num == 1 ? 1 : 0, buf_num,
155 DESC_TYPE_SKB);
156
157 /* fill the fragments */
158 for (i = 1; i < buf_num; i++) {
159 frag = &skb_shinfo(skb)->frags[i - 1];
160 size = skb_frag_size(frag);
161 dma = skb_frag_dma_map(dev, frag, 0, size, DMA_TO_DEVICE);
162 if (dma_mapping_error(dev, dma)) {
163 netdev_err(ndev, "TX frag(%d) DMA map failed\n", i);
164 ring->stats.sw_err_cnt++;
165 goto out_map_frag_fail;
166 }
167 fill_desc(ring, skb_frag_page(frag), size, dma,
168 buf_num - 1 == i ? 1 : 0, buf_num, DESC_TYPE_PAGE);
169 }
170
171 /*complete translate all packets*/
172 dev_queue = netdev_get_tx_queue(ndev, skb->queue_mapping);
173 netdev_tx_sent_queue(dev_queue, skb->len);
174
175 wmb(); /* commit all data before submit */
176 assert(skb->queue_mapping < priv->ae_handle->q_num);
177 hnae_queue_xmit(priv->ae_handle->qs[skb->queue_mapping], buf_num);
178 ring->stats.tx_pkts++;
179 ring->stats.tx_bytes += skb->len;
180
181 return NETDEV_TX_OK;
182
183out_map_frag_fail:
184
185 for (j = i - 1; j > 0; j--) {
186 unfill_desc(ring);
187 next_to_use = ring->next_to_use;
188 dma_unmap_page(dev, ring->desc_cb[next_to_use].dma,
189 ring->desc_cb[next_to_use].length,
190 DMA_TO_DEVICE);
191 }
192
193 unfill_desc(ring);
194 next_to_use = ring->next_to_use;
195 dma_unmap_single(dev, ring->desc_cb[next_to_use].dma,
196 ring->desc_cb[next_to_use].length, DMA_TO_DEVICE);
197
198out_err_tx_ok:
199
200 dev_kfree_skb_any(skb);
201 return NETDEV_TX_OK;
202
203out_net_tx_busy:
204
205 netif_stop_subqueue(ndev, skb->queue_mapping);
206
207 /* Herbert's original patch had:
208 * smp_mb__after_netif_stop_queue();
209 * but since that doesn't exist yet, just open code it.
210 */
211 smp_mb();
212 return NETDEV_TX_BUSY;
213}
214
215/**
216 * hns_nic_get_headlen - determine size of header for RSC/LRO/GRO/FCOE
217 * @data: pointer to the start of the headers
218 * @max: total length of section to find headers in
219 *
220 * This function is meant to determine the length of headers that will
221 * be recognized by hardware for LRO, GRO, and RSC offloads. The main
222 * motivation of doing this is to only perform one pull for IPv4 TCP
223 * packets so that we can do basic things like calculating the gso_size
224 * based on the average data per packet.
225 **/
226static unsigned int hns_nic_get_headlen(unsigned char *data, u32 flag,
227 unsigned int max_size)
228{
229 unsigned char *network;
230 u8 hlen;
231
232 /* this should never happen, but better safe than sorry */
233 if (max_size < ETH_HLEN)
234 return max_size;
235
236 /* initialize network frame pointer */
237 network = data;
238
239 /* set first protocol and move network header forward */
240 network += ETH_HLEN;
241
242 /* handle any vlan tag if present */
243 if (hnae_get_field(flag, HNS_RXD_VLAN_M, HNS_RXD_VLAN_S)
244 == HNS_RX_FLAG_VLAN_PRESENT) {
245 if ((typeof(max_size))(network - data) > (max_size - VLAN_HLEN))
246 return max_size;
247
248 network += VLAN_HLEN;
249 }
250
251 /* handle L3 protocols */
252 if (hnae_get_field(flag, HNS_RXD_L3ID_M, HNS_RXD_L3ID_S)
253 == HNS_RX_FLAG_L3ID_IPV4) {
254 if ((typeof(max_size))(network - data) >
255 (max_size - sizeof(struct iphdr)))
256 return max_size;
257
258 /* access ihl as a u8 to avoid unaligned access on ia64 */
259 hlen = (network[0] & 0x0F) << 2;
260
261 /* verify hlen meets minimum size requirements */
262 if (hlen < sizeof(struct iphdr))
263 return network - data;
264
265 /* record next protocol if header is present */
266 } else if (hnae_get_field(flag, HNS_RXD_L3ID_M, HNS_RXD_L3ID_S)
267 == HNS_RX_FLAG_L3ID_IPV6) {
268 if ((typeof(max_size))(network - data) >
269 (max_size - sizeof(struct ipv6hdr)))
270 return max_size;
271
272 /* record next protocol */
273 hlen = sizeof(struct ipv6hdr);
274 } else {
275 return network - data;
276 }
277
278 /* relocate pointer to start of L4 header */
279 network += hlen;
280
281 /* finally sort out TCP/UDP */
282 if (hnae_get_field(flag, HNS_RXD_L4ID_M, HNS_RXD_L4ID_S)
283 == HNS_RX_FLAG_L4ID_TCP) {
284 if ((typeof(max_size))(network - data) >
285 (max_size - sizeof(struct tcphdr)))
286 return max_size;
287
288 /* access doff as a u8 to avoid unaligned access on ia64 */
289 hlen = (network[12] & 0xF0) >> 2;
290
291 /* verify hlen meets minimum size requirements */
292 if (hlen < sizeof(struct tcphdr))
293 return network - data;
294
295 network += hlen;
296 } else if (hnae_get_field(flag, HNS_RXD_L4ID_M, HNS_RXD_L4ID_S)
297 == HNS_RX_FLAG_L4ID_UDP) {
298 if ((typeof(max_size))(network - data) >
299 (max_size - sizeof(struct udphdr)))
300 return max_size;
301
302 network += sizeof(struct udphdr);
303 }
304
305 /* If everything has gone correctly network should be the
306 * data section of the packet and will be the end of the header.
307 * If not then it probably represents the end of the last recognized
308 * header.
309 */
310 if ((typeof(max_size))(network - data) < max_size)
311 return network - data;
312 else
313 return max_size;
314}
315
316static void
317hns_nic_reuse_page(struct hnae_desc_cb *desc_cb, int tsize, int last_offset)
318{
319 /* avoid re-using remote pages,flag default unreuse */
320 if (likely(page_to_nid(desc_cb->priv) == numa_node_id())) {
321 /* move offset up to the next cache line */
322 desc_cb->page_offset += tsize;
323
324 if (desc_cb->page_offset <= last_offset) {
325 desc_cb->reuse_flag = 1;
326 /* bump ref count on page before it is given*/
327 get_page(desc_cb->priv);
328 }
329 }
330}
331
332static int hns_nic_poll_rx_skb(struct hns_nic_ring_data *ring_data,
333 struct sk_buff **out_skb, int *out_bnum)
334{
335 struct hnae_ring *ring = ring_data->ring;
336 struct net_device *ndev = ring_data->napi.dev;
337 struct sk_buff *skb;
338 struct hnae_desc *desc;
339 struct hnae_desc_cb *desc_cb;
340 unsigned char *va;
341 int bnum, length, size, i, truesize, last_offset;
342 int pull_len;
343 u32 bnum_flag;
344
345 last_offset = hnae_page_size(ring) - hnae_buf_size(ring);
346 desc = &ring->desc[ring->next_to_clean];
347 desc_cb = &ring->desc_cb[ring->next_to_clean];
348 length = le16_to_cpu(desc->rx.pkt_len);
349 bnum_flag = le32_to_cpu(desc->rx.ipoff_bnum_pid_flag);
350 bnum = hnae_get_field(bnum_flag, HNS_RXD_BUFNUM_M, HNS_RXD_BUFNUM_S);
351 *out_bnum = bnum;
352 va = (unsigned char *)desc_cb->buf + desc_cb->page_offset;
353
354 skb = *out_skb = napi_alloc_skb(&ring_data->napi, HNS_RX_HEAD_SIZE);
355 if (unlikely(!skb)) {
356 netdev_err(ndev, "alloc rx skb fail\n");
357 ring->stats.sw_err_cnt++;
358 return -ENOMEM;
359 }
360
361 if (length <= HNS_RX_HEAD_SIZE) {
362 memcpy(__skb_put(skb, length), va, ALIGN(length, sizeof(long)));
363
364 /* we can reuse buffer as-is, just make sure it is local */
365 if (likely(page_to_nid(desc_cb->priv) == numa_node_id()))
366 desc_cb->reuse_flag = 1;
367 else /* this page cannot be reused so discard it */
368 put_page(desc_cb->priv);
369
370 ring_ptr_move_fw(ring, next_to_clean);
371
372 if (unlikely(bnum != 1)) { /* check err*/
373 *out_bnum = 1;
374 goto out_bnum_err;
375 }
376 } else {
377 ring->stats.seg_pkt_cnt++;
378
379 pull_len = hns_nic_get_headlen(va, bnum_flag, HNS_RX_HEAD_SIZE);
380 memcpy(__skb_put(skb, pull_len), va,
381 ALIGN(pull_len, sizeof(long)));
382
383 size = le16_to_cpu(desc->rx.size);
384 truesize = ALIGN(size, L1_CACHE_BYTES);
385 skb_add_rx_frag(skb, 0, desc_cb->priv,
386 desc_cb->page_offset + pull_len,
387 size - pull_len, truesize - pull_len);
388
389 hns_nic_reuse_page(desc_cb, truesize, last_offset);
390 ring_ptr_move_fw(ring, next_to_clean);
391
392 if (unlikely(bnum >= (int)MAX_SKB_FRAGS)) { /* check err*/
393 *out_bnum = 1;
394 goto out_bnum_err;
395 }
396 for (i = 1; i < bnum; i++) {
397 desc = &ring->desc[ring->next_to_clean];
398 desc_cb = &ring->desc_cb[ring->next_to_clean];
399 size = le16_to_cpu(desc->rx.size);
400 truesize = ALIGN(size, L1_CACHE_BYTES);
401 skb_add_rx_frag(skb, i, desc_cb->priv,
402 desc_cb->page_offset,
403 size, truesize);
404
405 hns_nic_reuse_page(desc_cb, truesize, last_offset);
406 ring_ptr_move_fw(ring, next_to_clean);
407 }
408 }
409
410 /* check except process, free skb and jump the desc */
411 if (unlikely((!bnum) || (bnum > ring->max_desc_num_per_pkt))) {
412out_bnum_err:
413 *out_bnum = *out_bnum ? *out_bnum : 1; /* ntc moved,cannot 0*/
414 netdev_err(ndev, "invalid bnum(%d,%d,%d,%d),%016llx,%016llx\n",
415 bnum, ring->max_desc_num_per_pkt,
416 length, (int)MAX_SKB_FRAGS,
417 ((u64 *)desc)[0], ((u64 *)desc)[1]);
418 ring->stats.err_bd_num++;
419 dev_kfree_skb_any(skb);
420 return -EDOM;
421 }
422
423 bnum_flag = le32_to_cpu(desc->rx.ipoff_bnum_pid_flag);
424
425 if (unlikely(!hnae_get_bit(bnum_flag, HNS_RXD_VLD_B))) {
426 netdev_err(ndev, "no valid bd,%016llx,%016llx\n",
427 ((u64 *)desc)[0], ((u64 *)desc)[1]);
428 ring->stats.non_vld_descs++;
429 dev_kfree_skb_any(skb);
430 return -EINVAL;
431 }
432
433 if (unlikely((!desc->rx.pkt_len) ||
434 hnae_get_bit(bnum_flag, HNS_RXD_DROP_B))) {
b5996f11 435 ring->stats.err_pkt_len++;
436 dev_kfree_skb_any(skb);
437 return -EFAULT;
438 }
439
440 if (unlikely(hnae_get_bit(bnum_flag, HNS_RXD_L2E_B))) {
b5996f11 441 ring->stats.l2_err++;
442 dev_kfree_skb_any(skb);
443 return -EFAULT;
444 }
445
446 ring->stats.rx_pkts++;
447 ring->stats.rx_bytes += skb->len;
448
449 if (unlikely(hnae_get_bit(bnum_flag, HNS_RXD_L3E_B) ||
450 hnae_get_bit(bnum_flag, HNS_RXD_L4E_B))) {
b5996f11 451 ring->stats.l3l4_csum_err++;
452 return 0;
453 }
454
455 skb->ip_summed = CHECKSUM_UNNECESSARY;
456
457 return 0;
458}
459
460static void
461hns_nic_alloc_rx_buffers(struct hns_nic_ring_data *ring_data, int cleand_count)
462{
463 int i, ret;
464 struct hnae_desc_cb res_cbs;
465 struct hnae_desc_cb *desc_cb;
466 struct hnae_ring *ring = ring_data->ring;
467 struct net_device *ndev = ring_data->napi.dev;
468
469 for (i = 0; i < cleand_count; i++) {
470 desc_cb = &ring->desc_cb[ring->next_to_use];
471 if (desc_cb->reuse_flag) {
472 ring->stats.reuse_pg_cnt++;
473 hnae_reuse_buffer(ring, ring->next_to_use);
474 } else {
475 ret = hnae_reserve_buffer_map(ring, &res_cbs);
476 if (ret) {
477 ring->stats.sw_err_cnt++;
478 netdev_err(ndev, "hnae reserve buffer map failed.\n");
479 break;
480 }
481 hnae_replace_buffer(ring, ring->next_to_use, &res_cbs);
482 }
483
484 ring_ptr_move_fw(ring, next_to_use);
485 }
486
487 wmb(); /* make all data has been write before submit */
488 writel_relaxed(i, ring->io_base + RCB_REG_HEAD);
489}
490
491/* return error number for error or number of desc left to take
492 */
493static void hns_nic_rx_up_pro(struct hns_nic_ring_data *ring_data,
494 struct sk_buff *skb)
495{
496 struct net_device *ndev = ring_data->napi.dev;
497
498 skb->protocol = eth_type_trans(skb, ndev);
499 (void)napi_gro_receive(&ring_data->napi, skb);
500 ndev->last_rx = jiffies;
501}
502
503static int hns_nic_rx_poll_one(struct hns_nic_ring_data *ring_data,
504 int budget, void *v)
505{
506 struct hnae_ring *ring = ring_data->ring;
507 struct sk_buff *skb;
508 int num, bnum, ex_num;
509#define RCB_NOF_ALLOC_RX_BUFF_ONCE 16
510 int recv_pkts, recv_bds, clean_count, err;
511
512 num = readl_relaxed(ring->io_base + RCB_REG_FBDNUM);
513 rmb(); /* make sure num taken effect before the other data is touched */
514
515 recv_pkts = 0, recv_bds = 0, clean_count = 0;
516recv:
517 while (recv_pkts < budget && recv_bds < num) {
518 /* reuse or realloc buffers*/
519 if (clean_count >= RCB_NOF_ALLOC_RX_BUFF_ONCE) {
520 hns_nic_alloc_rx_buffers(ring_data, clean_count);
521 clean_count = 0;
522 }
523
524 /* poll one pkg*/
525 err = hns_nic_poll_rx_skb(ring_data, &skb, &bnum);
526 if (unlikely(!skb)) /* this fault cannot be repaired */
527 break;
528
529 recv_bds += bnum;
530 clean_count += bnum;
531 if (unlikely(err)) { /* do jump the err */
532 recv_pkts++;
533 continue;
534 }
535
536 /* do update ip stack process*/
537 ((void (*)(struct hns_nic_ring_data *, struct sk_buff *))v)(
538 ring_data, skb);
539 recv_pkts++;
540 }
541
542 /* make all data has been write before submit */
543 if (clean_count > 0) {
544 hns_nic_alloc_rx_buffers(ring_data, clean_count);
545 clean_count = 0;
546 }
547
548 if (recv_pkts < budget) {
549 ex_num = readl_relaxed(ring->io_base + RCB_REG_FBDNUM);
550 rmb(); /*complete read rx ring bd number*/
551 if (ex_num > 0) {
552 num += ex_num;
553 goto recv;
554 }
555 }
556
557 return recv_pkts;
558}
559
560static void hns_nic_rx_fini_pro(struct hns_nic_ring_data *ring_data)
561{
562 struct hnae_ring *ring = ring_data->ring;
563 int num = 0;
564
565 /* for hardware bug fixed */
566 num = readl_relaxed(ring->io_base + RCB_REG_FBDNUM);
567
568 if (num > 0) {
569 ring_data->ring->q->handle->dev->ops->toggle_ring_irq(
570 ring_data->ring, 1);
571
572 napi_schedule(&ring_data->napi);
573 }
574}
575
576static inline void hns_nic_reclaim_one_desc(struct hnae_ring *ring,
577 int *bytes, int *pkts)
578{
579 struct hnae_desc_cb *desc_cb = &ring->desc_cb[ring->next_to_clean];
580
581 (*pkts) += (desc_cb->type == DESC_TYPE_SKB);
582 (*bytes) += desc_cb->length;
583 /* desc_cb will be cleaned, after hnae_free_buffer_detach*/
584 hnae_free_buffer_detach(ring, ring->next_to_clean);
585
586 ring_ptr_move_fw(ring, next_to_clean);
587}
588
589static int is_valid_clean_head(struct hnae_ring *ring, int h)
590{
591 int u = ring->next_to_use;
592 int c = ring->next_to_clean;
593
594 if (unlikely(h > ring->desc_num))
595 return 0;
596
597 assert(u > 0 && u < ring->desc_num);
598 assert(c > 0 && c < ring->desc_num);
599 assert(u != c && h != c); /* must be checked before call this func */
600
601 return u > c ? (h > c && h <= u) : (h > c || h <= u);
602}
603
604/* netif_tx_lock will turn down the performance, set only when necessary */
605#ifdef CONFIG_NET_POLL_CONTROLLER
606#define NETIF_TX_LOCK(ndev) netif_tx_lock(ndev)
607#define NETIF_TX_UNLOCK(ndev) netif_tx_unlock(ndev)
608#else
609#define NETIF_TX_LOCK(ndev)
610#define NETIF_TX_UNLOCK(ndev)
611#endif
612/* reclaim all desc in one budget
613 * return error or number of desc left
614 */
615static int hns_nic_tx_poll_one(struct hns_nic_ring_data *ring_data,
616 int budget, void *v)
617{
618 struct hnae_ring *ring = ring_data->ring;
619 struct net_device *ndev = ring_data->napi.dev;
620 struct netdev_queue *dev_queue;
621 struct hns_nic_priv *priv = netdev_priv(ndev);
622 int head;
623 int bytes, pkts;
624
625 NETIF_TX_LOCK(ndev);
626
627 head = readl_relaxed(ring->io_base + RCB_REG_HEAD);
628 rmb(); /* make sure head is ready before touch any data */
629
630 if (is_ring_empty(ring) || head == ring->next_to_clean) {
631 NETIF_TX_UNLOCK(ndev);
632 return 0; /* no data to poll */
633 }
634
635 if (!is_valid_clean_head(ring, head)) {
636 netdev_err(ndev, "wrong head (%d, %d-%d)\n", head,
637 ring->next_to_use, ring->next_to_clean);
638 ring->stats.io_err_cnt++;
639 NETIF_TX_UNLOCK(ndev);
640 return -EIO;
641 }
642
643 bytes = 0;
644 pkts = 0;
645 while (head != ring->next_to_clean)
646 hns_nic_reclaim_one_desc(ring, &bytes, &pkts);
647
648 NETIF_TX_UNLOCK(ndev);
649
650 dev_queue = netdev_get_tx_queue(ndev, ring_data->queue_index);
651 netdev_tx_completed_queue(dev_queue, pkts, bytes);
652
653 if (unlikely(pkts && netif_carrier_ok(ndev) &&
654 (ring_space(ring) >= ring->max_desc_num_per_pkt * 2))) {
655 /* Make sure that anybody stopping the queue after this
656 * sees the new next_to_clean.
657 */
658 smp_mb();
659 if (netif_tx_queue_stopped(dev_queue) &&
660 !test_bit(NIC_STATE_DOWN, &priv->state)) {
661 netif_tx_wake_queue(dev_queue);
662 ring->stats.restart_queue++;
663 }
664 }
665 return 0;
666}
667
668static void hns_nic_tx_fini_pro(struct hns_nic_ring_data *ring_data)
669{
670 struct hnae_ring *ring = ring_data->ring;
671 int head = ring->next_to_clean;
672
673 /* for hardware bug fixed */
674 head = readl_relaxed(ring->io_base + RCB_REG_HEAD);
675
676 if (head != ring->next_to_clean) {
677 ring_data->ring->q->handle->dev->ops->toggle_ring_irq(
678 ring_data->ring, 1);
679
680 napi_schedule(&ring_data->napi);
681 }
682}
683
684static void hns_nic_tx_clr_all_bufs(struct hns_nic_ring_data *ring_data)
685{
686 struct hnae_ring *ring = ring_data->ring;
687 struct net_device *ndev = ring_data->napi.dev;
688 struct netdev_queue *dev_queue;
689 int head;
690 int bytes, pkts;
691
692 NETIF_TX_LOCK(ndev);
693
694 head = ring->next_to_use; /* ntu :soft setted ring position*/
695 bytes = 0;
696 pkts = 0;
697 while (head != ring->next_to_clean)
698 hns_nic_reclaim_one_desc(ring, &bytes, &pkts);
699
700 NETIF_TX_UNLOCK(ndev);
701
702 dev_queue = netdev_get_tx_queue(ndev, ring_data->queue_index);
703 netdev_tx_reset_queue(dev_queue);
704}
705
706static int hns_nic_common_poll(struct napi_struct *napi, int budget)
707{
708 struct hns_nic_ring_data *ring_data =
709 container_of(napi, struct hns_nic_ring_data, napi);
710 int clean_complete = ring_data->poll_one(
711 ring_data, budget, ring_data->ex_process);
712
713 if (clean_complete >= 0 && clean_complete < budget) {
714 napi_complete(napi);
715 ring_data->ring->q->handle->dev->ops->toggle_ring_irq(
716 ring_data->ring, 0);
717
718 ring_data->fini_process(ring_data);
719 }
720
721 return clean_complete;
722}
723
724static irqreturn_t hns_irq_handle(int irq, void *dev)
725{
726 struct hns_nic_ring_data *ring_data = (struct hns_nic_ring_data *)dev;
727
728 ring_data->ring->q->handle->dev->ops->toggle_ring_irq(
729 ring_data->ring, 1);
730 napi_schedule(&ring_data->napi);
731
732 return IRQ_HANDLED;
733}
734
735/**
736 *hns_nic_adjust_link - adjust net work mode by the phy stat or new param
737 *@ndev: net device
738 */
739static void hns_nic_adjust_link(struct net_device *ndev)
740{
741 struct hns_nic_priv *priv = netdev_priv(ndev);
742 struct hnae_handle *h = priv->ae_handle;
743
744 h->dev->ops->adjust_link(h, ndev->phydev->speed, ndev->phydev->duplex);
745}
746
747/**
748 *hns_nic_init_phy - init phy
749 *@ndev: net device
750 *@h: ae handle
751 * Return 0 on success, negative on failure
752 */
753int hns_nic_init_phy(struct net_device *ndev, struct hnae_handle *h)
754{
755 struct hns_nic_priv *priv = netdev_priv(ndev);
756 struct phy_device *phy_dev = NULL;
757
758 if (!h->phy_node)
759 return 0;
760
761 if (h->phy_if != PHY_INTERFACE_MODE_XGMII)
762 phy_dev = of_phy_connect(ndev, h->phy_node,
763 hns_nic_adjust_link, 0, h->phy_if);
764 else
765 phy_dev = of_phy_attach(ndev, h->phy_node, 0, h->phy_if);
766
767 if (unlikely(!phy_dev) || IS_ERR(phy_dev))
768 return !phy_dev ? -ENODEV : PTR_ERR(phy_dev);
769
770 phy_dev->supported &= h->if_support;
771 phy_dev->advertising = phy_dev->supported;
772
773 if (h->phy_if == PHY_INTERFACE_MODE_XGMII)
774 phy_dev->autoneg = false;
775
776 priv->phy = phy_dev;
777
778 return 0;
779}
780
781static int hns_nic_ring_open(struct net_device *netdev, int idx)
782{
783 struct hns_nic_priv *priv = netdev_priv(netdev);
784 struct hnae_handle *h = priv->ae_handle;
785
786 napi_enable(&priv->ring_data[idx].napi);
787
788 enable_irq(priv->ring_data[idx].ring->irq);
789 h->dev->ops->toggle_ring_irq(priv->ring_data[idx].ring, 0);
790
791 return 0;
792}
793
794static int hns_nic_net_set_mac_address(struct net_device *ndev, void *p)
795{
796 struct hns_nic_priv *priv = netdev_priv(ndev);
797 struct hnae_handle *h = priv->ae_handle;
798 struct sockaddr *mac_addr = p;
799 int ret;
800
801 if (!mac_addr || !is_valid_ether_addr((const u8 *)mac_addr->sa_data))
802 return -EADDRNOTAVAIL;
803
804 ret = h->dev->ops->set_mac_addr(h, mac_addr->sa_data);
805 if (ret) {
806 netdev_err(ndev, "set_mac_address fail, ret=%d!\n", ret);
807 return ret;
808 }
809
810 memcpy(ndev->dev_addr, mac_addr->sa_data, ndev->addr_len);
811
812 return 0;
813}
814
815void hns_nic_update_stats(struct net_device *netdev)
816{
817 struct hns_nic_priv *priv = netdev_priv(netdev);
818 struct hnae_handle *h = priv->ae_handle;
819
820 h->dev->ops->update_stats(h, &netdev->stats);
821}
822
823/* set mac addr if it is configed. or leave it to the AE driver */
824static void hns_init_mac_addr(struct net_device *ndev)
825{
826 struct hns_nic_priv *priv = netdev_priv(ndev);
827 struct device_node *node = priv->dev->of_node;
828 const void *mac_addr_temp;
829
830 mac_addr_temp = of_get_mac_address(node);
831 if (mac_addr_temp && is_valid_ether_addr(mac_addr_temp)) {
832 memcpy(ndev->dev_addr, mac_addr_temp, ndev->addr_len);
833 } else {
834 eth_hw_addr_random(ndev);
835 dev_warn(priv->dev, "No valid mac, use random mac %pM",
836 ndev->dev_addr);
837 }
838}
839
840static void hns_nic_ring_close(struct net_device *netdev, int idx)
841{
842 struct hns_nic_priv *priv = netdev_priv(netdev);
843 struct hnae_handle *h = priv->ae_handle;
844
845 h->dev->ops->toggle_ring_irq(priv->ring_data[idx].ring, 1);
846 disable_irq(priv->ring_data[idx].ring->irq);
847
848 napi_disable(&priv->ring_data[idx].napi);
849}
850
851static int hns_nic_init_irq(struct hns_nic_priv *priv)
852{
853 struct hnae_handle *h = priv->ae_handle;
854 struct hns_nic_ring_data *rd;
855 int i;
856 int ret;
857 int cpu;
858 cpumask_t mask;
859
860 for (i = 0; i < h->q_num * 2; i++) {
861 rd = &priv->ring_data[i];
862
863 if (rd->ring->irq_init_flag == RCB_IRQ_INITED)
864 break;
865
866 snprintf(rd->ring->ring_name, RCB_RING_NAME_LEN,
867 "%s-%s%d", priv->netdev->name,
868 (i < h->q_num ? "tx" : "rx"), rd->queue_index);
869
870 rd->ring->ring_name[RCB_RING_NAME_LEN - 1] = '\0';
871
872 ret = request_irq(rd->ring->irq,
873 hns_irq_handle, 0, rd->ring->ring_name, rd);
874 if (ret) {
875 netdev_err(priv->netdev, "request irq(%d) fail\n",
876 rd->ring->irq);
877 return ret;
878 }
879 disable_irq(rd->ring->irq);
880 rd->ring->irq_init_flag = RCB_IRQ_INITED;
881
882 /*set cpu affinity*/
883 if (cpu_online(rd->queue_index)) {
884 cpumask_clear(&mask);
885 cpu = rd->queue_index;
886 cpumask_set_cpu(cpu, &mask);
887 irq_set_affinity_hint(rd->ring->irq, &mask);
888 }
889 }
890
891 return 0;
892}
893
894static int hns_nic_net_up(struct net_device *ndev)
895{
896 struct hns_nic_priv *priv = netdev_priv(ndev);
897 struct hnae_handle *h = priv->ae_handle;
898 int i, j, k;
899 int ret;
900
901 ret = hns_nic_init_irq(priv);
902 if (ret != 0) {
903 netdev_err(ndev, "hns init irq failed! ret=%d\n", ret);
904 return ret;
905 }
906
907 for (i = 0; i < h->q_num * 2; i++) {
908 ret = hns_nic_ring_open(ndev, i);
909 if (ret)
910 goto out_has_some_queues;
911 }
912
913 for (k = 0; k < h->q_num; k++)
914 h->dev->ops->toggle_queue_status(h->qs[k], 1);
915
916 ret = h->dev->ops->set_mac_addr(h, ndev->dev_addr);
917 if (ret)
918 goto out_set_mac_addr_err;
919
920 ret = h->dev->ops->start ? h->dev->ops->start(h) : 0;
921 if (ret)
922 goto out_start_err;
923
924 if (priv->phy)
925 phy_start(priv->phy);
926
927 clear_bit(NIC_STATE_DOWN, &priv->state);
928 (void)mod_timer(&priv->service_timer, jiffies + SERVICE_TIMER_HZ);
929
930 return 0;
931
932out_start_err:
933 netif_stop_queue(ndev);
934out_set_mac_addr_err:
935 for (k = 0; k < h->q_num; k++)
936 h->dev->ops->toggle_queue_status(h->qs[k], 0);
937out_has_some_queues:
938 for (j = i - 1; j >= 0; j--)
939 hns_nic_ring_close(ndev, j);
940
941 set_bit(NIC_STATE_DOWN, &priv->state);
942
943 return ret;
944}
945
946static void hns_nic_net_down(struct net_device *ndev)
947{
948 int i;
949 struct hnae_ae_ops *ops;
950 struct hns_nic_priv *priv = netdev_priv(ndev);
951
952 if (test_and_set_bit(NIC_STATE_DOWN, &priv->state))
953 return;
954
955 (void)del_timer_sync(&priv->service_timer);
956 netif_tx_stop_all_queues(ndev);
957 netif_carrier_off(ndev);
958 netif_tx_disable(ndev);
959 priv->link = 0;
960
961 if (priv->phy)
962 phy_stop(priv->phy);
963
964 ops = priv->ae_handle->dev->ops;
965
966 if (ops->stop)
967 ops->stop(priv->ae_handle);
968
969 netif_tx_stop_all_queues(ndev);
970
971 for (i = priv->ae_handle->q_num - 1; i >= 0; i--) {
972 hns_nic_ring_close(ndev, i);
973 hns_nic_ring_close(ndev, i + priv->ae_handle->q_num);
974
975 /* clean tx buffers*/
976 hns_nic_tx_clr_all_bufs(priv->ring_data + i);
977 }
978}
979
980void hns_nic_net_reset(struct net_device *ndev)
981{
982 struct hns_nic_priv *priv = netdev_priv(ndev);
983 struct hnae_handle *handle = priv->ae_handle;
984
985 while (test_and_set_bit(NIC_STATE_RESETTING, &priv->state))
986 usleep_range(1000, 2000);
987
988 (void)hnae_reinit_handle(handle);
989
990 clear_bit(NIC_STATE_RESETTING, &priv->state);
991}
992
993void hns_nic_net_reinit(struct net_device *netdev)
994{
995 struct hns_nic_priv *priv = netdev_priv(netdev);
996
997 priv->netdev->trans_start = jiffies;
998 while (test_and_set_bit(NIC_STATE_REINITING, &priv->state))
999 usleep_range(1000, 2000);
1000
1001 hns_nic_net_down(netdev);
1002 hns_nic_net_reset(netdev);
1003 (void)hns_nic_net_up(netdev);
1004 clear_bit(NIC_STATE_REINITING, &priv->state);
1005}
1006
1007static int hns_nic_net_open(struct net_device *ndev)
1008{
1009 struct hns_nic_priv *priv = netdev_priv(ndev);
1010 struct hnae_handle *h = priv->ae_handle;
1011 int ret;
1012
1013 if (test_bit(NIC_STATE_TESTING, &priv->state))
1014 return -EBUSY;
1015
1016 priv->link = 0;
1017 netif_carrier_off(ndev);
1018
1019 ret = netif_set_real_num_tx_queues(ndev, h->q_num);
1020 if (ret < 0) {
1021 netdev_err(ndev, "netif_set_real_num_tx_queues fail, ret=%d!\n",
1022 ret);
1023 return ret;
1024 }
1025
1026 ret = netif_set_real_num_rx_queues(ndev, h->q_num);
1027 if (ret < 0) {
1028 netdev_err(ndev,
1029 "netif_set_real_num_rx_queues fail, ret=%d!\n", ret);
1030 return ret;
1031 }
1032
1033 ret = hns_nic_net_up(ndev);
1034 if (ret) {
1035 netdev_err(ndev,
1036 "hns net up fail, ret=%d!\n", ret);
1037 return ret;
1038 }
1039
1040 return 0;
1041}
1042
1043static int hns_nic_net_stop(struct net_device *ndev)
1044{
1045 hns_nic_net_down(ndev);
1046
1047 return 0;
1048}
1049
1050static void hns_tx_timeout_reset(struct hns_nic_priv *priv);
1051static void hns_nic_net_timeout(struct net_device *ndev)
1052{
1053 struct hns_nic_priv *priv = netdev_priv(ndev);
1054
1055 hns_tx_timeout_reset(priv);
1056}
1057
1058static int hns_nic_do_ioctl(struct net_device *netdev, struct ifreq *ifr,
1059 int cmd)
1060{
1061 struct hns_nic_priv *priv = netdev_priv(netdev);
1062 struct phy_device *phy_dev = priv->phy;
1063
1064 if (!netif_running(netdev))
1065 return -EINVAL;
1066
1067 if (!phy_dev)
1068 return -ENOTSUPP;
1069
1070 return phy_mii_ioctl(phy_dev, ifr, cmd);
1071}
1072
1073/* use only for netconsole to poll with the device without interrupt */
1074#ifdef CONFIG_NET_POLL_CONTROLLER
1075void hns_nic_poll_controller(struct net_device *ndev)
1076{
1077 struct hns_nic_priv *priv = netdev_priv(ndev);
1078 unsigned long flags;
1079 int i;
1080
1081 local_irq_save(flags);
1082 for (i = 0; i < priv->ae_handle->q_num * 2; i++)
1083 napi_schedule(&priv->ring_data[i].napi);
1084 local_irq_restore(flags);
1085}
1086#endif
1087
1088static netdev_tx_t hns_nic_net_xmit(struct sk_buff *skb,
1089 struct net_device *ndev)
1090{
1091 struct hns_nic_priv *priv = netdev_priv(ndev);
1092 int ret;
1093
1094 assert(skb->queue_mapping < ndev->ae_handle->q_num);
1095 ret = hns_nic_net_xmit_hw(ndev, skb,
1096 &tx_ring_data(priv, skb->queue_mapping));
1097 if (ret == NETDEV_TX_OK) {
1098 ndev->trans_start = jiffies;
1099 ndev->stats.tx_bytes += skb->len;
1100 ndev->stats.tx_packets++;
1101 }
1102 return (netdev_tx_t)ret;
1103}
1104
1105static int hns_nic_change_mtu(struct net_device *ndev, int new_mtu)
1106{
1107 struct hns_nic_priv *priv = netdev_priv(ndev);
1108 struct hnae_handle *h = priv->ae_handle;
1109 int ret;
1110
1111 /* MTU < 68 is an error and causes problems on some kernels */
1112 if (new_mtu < 68)
1113 return -EINVAL;
1114
1115 if (!h->dev->ops->set_mtu)
1116 return -ENOTSUPP;
1117
1118 if (netif_running(ndev)) {
1119 (void)hns_nic_net_stop(ndev);
1120 msleep(100);
1121
1122 ret = h->dev->ops->set_mtu(h, new_mtu);
1123 if (ret)
1124 netdev_err(ndev, "set mtu fail, return value %d\n",
1125 ret);
1126
1127 if (hns_nic_net_open(ndev))
1128 netdev_err(ndev, "hns net open fail\n");
1129 } else {
1130 ret = h->dev->ops->set_mtu(h, new_mtu);
1131 }
1132
1133 if (!ret)
1134 ndev->mtu = new_mtu;
1135
1136 return ret;
1137}
1138
1139/**
1140 * nic_set_multicast_list - set mutl mac address
1141 * @netdev: net device
1142 * @p: mac address
1143 *
1144 * return void
1145 */
1146void hns_set_multicast_list(struct net_device *ndev)
1147{
1148 struct hns_nic_priv *priv = netdev_priv(ndev);
1149 struct hnae_handle *h = priv->ae_handle;
1150 struct netdev_hw_addr *ha = NULL;
1151
1152 if (!h) {
1153 netdev_err(ndev, "hnae handle is null\n");
1154 return;
1155 }
1156
1157 if (h->dev->ops->set_mc_addr) {
1158 netdev_for_each_mc_addr(ha, ndev)
1159 if (h->dev->ops->set_mc_addr(h, ha->addr))
1160 netdev_err(ndev, "set multicast fail\n");
1161 }
1162}
1163
4568637f 1164void hns_nic_set_rx_mode(struct net_device *ndev)
1165{
1166 struct hns_nic_priv *priv = netdev_priv(ndev);
1167 struct hnae_handle *h = priv->ae_handle;
1168
1169 if (h->dev->ops->set_promisc_mode) {
1170 if (ndev->flags & IFF_PROMISC)
1171 h->dev->ops->set_promisc_mode(h, 1);
1172 else
1173 h->dev->ops->set_promisc_mode(h, 0);
1174 }
1175
1176 hns_set_multicast_list(ndev);
1177}
1178
b5996f11 1179struct rtnl_link_stats64 *hns_nic_get_stats64(struct net_device *ndev,
1180 struct rtnl_link_stats64 *stats)
1181{
1182 int idx = 0;
1183 u64 tx_bytes = 0;
1184 u64 rx_bytes = 0;
1185 u64 tx_pkts = 0;
1186 u64 rx_pkts = 0;
1187 struct hns_nic_priv *priv = netdev_priv(ndev);
1188 struct hnae_handle *h = priv->ae_handle;
1189
1190 for (idx = 0; idx < h->q_num; idx++) {
1191 tx_bytes += h->qs[idx]->tx_ring.stats.tx_bytes;
1192 tx_pkts += h->qs[idx]->tx_ring.stats.tx_pkts;
1193 rx_bytes += h->qs[idx]->rx_ring.stats.rx_bytes;
1194 rx_pkts += h->qs[idx]->rx_ring.stats.rx_pkts;
1195 }
1196
1197 stats->tx_bytes = tx_bytes;
1198 stats->tx_packets = tx_pkts;
1199 stats->rx_bytes = rx_bytes;
1200 stats->rx_packets = rx_pkts;
1201
1202 stats->rx_errors = ndev->stats.rx_errors;
1203 stats->multicast = ndev->stats.multicast;
1204 stats->rx_length_errors = ndev->stats.rx_length_errors;
1205 stats->rx_crc_errors = ndev->stats.rx_crc_errors;
1206 stats->rx_missed_errors = ndev->stats.rx_missed_errors;
1207
1208 stats->tx_errors = ndev->stats.tx_errors;
1209 stats->rx_dropped = ndev->stats.rx_dropped;
1210 stats->tx_dropped = ndev->stats.tx_dropped;
1211 stats->collisions = ndev->stats.collisions;
1212 stats->rx_over_errors = ndev->stats.rx_over_errors;
1213 stats->rx_frame_errors = ndev->stats.rx_frame_errors;
1214 stats->rx_fifo_errors = ndev->stats.rx_fifo_errors;
1215 stats->tx_aborted_errors = ndev->stats.tx_aborted_errors;
1216 stats->tx_carrier_errors = ndev->stats.tx_carrier_errors;
1217 stats->tx_fifo_errors = ndev->stats.tx_fifo_errors;
1218 stats->tx_heartbeat_errors = ndev->stats.tx_heartbeat_errors;
1219 stats->tx_window_errors = ndev->stats.tx_window_errors;
1220 stats->rx_compressed = ndev->stats.rx_compressed;
1221 stats->tx_compressed = ndev->stats.tx_compressed;
1222
1223 return stats;
1224}
1225
1226static const struct net_device_ops hns_nic_netdev_ops = {
1227 .ndo_open = hns_nic_net_open,
1228 .ndo_stop = hns_nic_net_stop,
1229 .ndo_start_xmit = hns_nic_net_xmit,
1230 .ndo_tx_timeout = hns_nic_net_timeout,
1231 .ndo_set_mac_address = hns_nic_net_set_mac_address,
1232 .ndo_change_mtu = hns_nic_change_mtu,
1233 .ndo_do_ioctl = hns_nic_do_ioctl,
1234 .ndo_get_stats64 = hns_nic_get_stats64,
1235#ifdef CONFIG_NET_POLL_CONTROLLER
1236 .ndo_poll_controller = hns_nic_poll_controller,
1237#endif
4568637f 1238 .ndo_set_rx_mode = hns_nic_set_rx_mode,
b5996f11 1239};
1240
1241static void hns_nic_update_link_status(struct net_device *netdev)
1242{
1243 struct hns_nic_priv *priv = netdev_priv(netdev);
1244
1245 struct hnae_handle *h = priv->ae_handle;
1246 int state = 1;
1247
1248 if (priv->phy) {
1249 if (!genphy_update_link(priv->phy))
1250 state = priv->phy->link;
1251 else
1252 state = 0;
1253 }
1254 state = state && h->dev->ops->get_status(h);
1255
1256 if (state != priv->link) {
1257 if (state) {
1258 netif_carrier_on(netdev);
1259 netif_tx_wake_all_queues(netdev);
1260 netdev_info(netdev, "link up\n");
1261 } else {
1262 netif_carrier_off(netdev);
1263 netdev_info(netdev, "link down\n");
1264 }
1265 priv->link = state;
1266 }
1267}
1268
1269/* for dumping key regs*/
1270static void hns_nic_dump(struct hns_nic_priv *priv)
1271{
1272 struct hnae_handle *h = priv->ae_handle;
1273 struct hnae_ae_ops *ops = h->dev->ops;
1274 u32 *data, reg_num, i;
1275
1276 if (ops->get_regs_len && ops->get_regs) {
1277 reg_num = ops->get_regs_len(priv->ae_handle);
1278 reg_num = (reg_num + 3ul) & ~3ul;
1279 data = kcalloc(reg_num, sizeof(u32), GFP_KERNEL);
1280 if (data) {
1281 ops->get_regs(priv->ae_handle, data);
1282 for (i = 0; i < reg_num; i += 4)
1283 pr_info("0x%08x: 0x%08x 0x%08x 0x%08x 0x%08x\n",
1284 i, data[i], data[i + 1],
1285 data[i + 2], data[i + 3]);
1286 kfree(data);
1287 }
1288 }
1289
1290 for (i = 0; i < h->q_num; i++) {
1291 pr_info("tx_queue%d_next_to_clean:%d\n",
1292 i, h->qs[i]->tx_ring.next_to_clean);
1293 pr_info("tx_queue%d_next_to_use:%d\n",
1294 i, h->qs[i]->tx_ring.next_to_use);
1295 pr_info("rx_queue%d_next_to_clean:%d\n",
1296 i, h->qs[i]->rx_ring.next_to_clean);
1297 pr_info("rx_queue%d_next_to_use:%d\n",
1298 i, h->qs[i]->rx_ring.next_to_use);
1299 }
1300}
1301
1302/* for resetting suntask*/
1303static void hns_nic_reset_subtask(struct hns_nic_priv *priv)
1304{
1305 enum hnae_port_type type = priv->ae_handle->port_type;
1306
1307 if (!test_bit(NIC_STATE2_RESET_REQUESTED, &priv->state))
1308 return;
1309 clear_bit(NIC_STATE2_RESET_REQUESTED, &priv->state);
1310
1311 /* If we're already down, removing or resetting, just bail */
1312 if (test_bit(NIC_STATE_DOWN, &priv->state) ||
1313 test_bit(NIC_STATE_REMOVING, &priv->state) ||
1314 test_bit(NIC_STATE_RESETTING, &priv->state))
1315 return;
1316
1317 hns_nic_dump(priv);
1318 netdev_err(priv->netdev, "Reset %s port\n",
1319 (type == HNAE_PORT_DEBUG ? "debug" : "business"));
1320
1321 rtnl_lock();
1322 if (type == HNAE_PORT_DEBUG) {
1323 hns_nic_net_reinit(priv->netdev);
1324 } else {
1325 hns_nic_net_down(priv->netdev);
1326 hns_nic_net_reset(priv->netdev);
1327 }
1328 rtnl_unlock();
1329}
1330
1331/* for doing service complete*/
1332static void hns_nic_service_event_complete(struct hns_nic_priv *priv)
1333{
1334 assert(!test_bit(NIC_STATE_SERVICE_SCHED, &priv->state));
1335
1336 smp_mb__before_atomic();
1337 clear_bit(NIC_STATE_SERVICE_SCHED, &priv->state);
1338}
1339
1340static void hns_nic_service_task(struct work_struct *work)
1341{
1342 struct hns_nic_priv *priv
1343 = container_of(work, struct hns_nic_priv, service_task);
1344 struct hnae_handle *h = priv->ae_handle;
1345
1346 hns_nic_update_link_status(priv->netdev);
1347 h->dev->ops->update_led_status(h);
1348 hns_nic_update_stats(priv->netdev);
1349
1350 hns_nic_reset_subtask(priv);
1351 hns_nic_service_event_complete(priv);
1352}
1353
1354static void hns_nic_task_schedule(struct hns_nic_priv *priv)
1355{
1356 if (!test_bit(NIC_STATE_DOWN, &priv->state) &&
1357 !test_bit(NIC_STATE_REMOVING, &priv->state) &&
1358 !test_and_set_bit(NIC_STATE_SERVICE_SCHED, &priv->state))
1359 (void)schedule_work(&priv->service_task);
1360}
1361
1362static void hns_nic_service_timer(unsigned long data)
1363{
1364 struct hns_nic_priv *priv = (struct hns_nic_priv *)data;
1365
1366 (void)mod_timer(&priv->service_timer, jiffies + SERVICE_TIMER_HZ);
1367
1368 hns_nic_task_schedule(priv);
1369}
1370
1371/**
1372 * hns_tx_timeout_reset - initiate reset due to Tx timeout
1373 * @priv: driver private struct
1374 **/
1375static void hns_tx_timeout_reset(struct hns_nic_priv *priv)
1376{
1377 /* Do the reset outside of interrupt context */
1378 if (!test_bit(NIC_STATE_DOWN, &priv->state)) {
1379 set_bit(NIC_STATE2_RESET_REQUESTED, &priv->state);
1380 netdev_warn(priv->netdev,
1381 "initiating reset due to tx timeout(%llu,0x%lx)\n",
1382 priv->tx_timeout_count, priv->state);
1383 priv->tx_timeout_count++;
1384 hns_nic_task_schedule(priv);
1385 }
1386}
1387
1388static int hns_nic_init_ring_data(struct hns_nic_priv *priv)
1389{
1390 struct hnae_handle *h = priv->ae_handle;
1391 struct hns_nic_ring_data *rd;
1392 int i;
1393
1394 if (h->q_num > NIC_MAX_Q_PER_VF) {
1395 netdev_err(priv->netdev, "too much queue (%d)\n", h->q_num);
1396 return -EINVAL;
1397 }
1398
1399 priv->ring_data = kzalloc(h->q_num * sizeof(*priv->ring_data) * 2,
1400 GFP_KERNEL);
1401 if (!priv->ring_data)
1402 return -ENOMEM;
1403
1404 for (i = 0; i < h->q_num; i++) {
1405 rd = &priv->ring_data[i];
1406 rd->queue_index = i;
1407 rd->ring = &h->qs[i]->tx_ring;
1408 rd->poll_one = hns_nic_tx_poll_one;
1409 rd->fini_process = hns_nic_tx_fini_pro;
1410
1411 netif_napi_add(priv->netdev, &rd->napi,
1412 hns_nic_common_poll, NIC_TX_CLEAN_MAX_NUM);
1413 rd->ring->irq_init_flag = RCB_IRQ_NOT_INITED;
1414 }
1415 for (i = h->q_num; i < h->q_num * 2; i++) {
1416 rd = &priv->ring_data[i];
1417 rd->queue_index = i - h->q_num;
1418 rd->ring = &h->qs[i - h->q_num]->rx_ring;
1419 rd->poll_one = hns_nic_rx_poll_one;
1420 rd->ex_process = hns_nic_rx_up_pro;
1421 rd->fini_process = hns_nic_rx_fini_pro;
1422
1423 netif_napi_add(priv->netdev, &rd->napi,
1424 hns_nic_common_poll, NIC_RX_CLEAN_MAX_NUM);
1425 rd->ring->irq_init_flag = RCB_IRQ_NOT_INITED;
1426 }
1427
1428 return 0;
1429}
1430
1431static void hns_nic_uninit_ring_data(struct hns_nic_priv *priv)
1432{
1433 struct hnae_handle *h = priv->ae_handle;
1434 int i;
1435
1436 for (i = 0; i < h->q_num * 2; i++) {
1437 netif_napi_del(&priv->ring_data[i].napi);
1438 if (priv->ring_data[i].ring->irq_init_flag == RCB_IRQ_INITED) {
1439 irq_set_affinity_hint(priv->ring_data[i].ring->irq,
1440 NULL);
1441 free_irq(priv->ring_data[i].ring->irq,
1442 &priv->ring_data[i]);
1443 }
1444
1445 priv->ring_data[i].ring->irq_init_flag = RCB_IRQ_NOT_INITED;
1446 }
1447 kfree(priv->ring_data);
1448}
1449
1450static int hns_nic_try_get_ae(struct net_device *ndev)
1451{
1452 struct hns_nic_priv *priv = netdev_priv(ndev);
1453 struct hnae_handle *h;
1454 int ret;
1455
1456 h = hnae_get_handle(&priv->netdev->dev,
1457 priv->ae_name, priv->port_id, NULL);
1458 if (IS_ERR_OR_NULL(h)) {
1459 ret = PTR_ERR(h);
1460 dev_dbg(priv->dev, "has not handle, register notifier!\n");
1461 goto out;
1462 }
1463 priv->ae_handle = h;
1464
1465 ret = hns_nic_init_phy(ndev, h);
1466 if (ret) {
1467 dev_err(priv->dev, "probe phy device fail!\n");
1468 goto out_init_phy;
1469 }
1470
1471 ret = hns_nic_init_ring_data(priv);
1472 if (ret) {
1473 ret = -ENOMEM;
1474 goto out_init_ring_data;
1475 }
1476
1477 ret = register_netdev(ndev);
1478 if (ret) {
1479 dev_err(priv->dev, "probe register netdev fail!\n");
1480 goto out_reg_ndev_fail;
1481 }
1482 return 0;
1483
1484out_reg_ndev_fail:
1485 hns_nic_uninit_ring_data(priv);
1486 priv->ring_data = NULL;
1487out_init_phy:
1488out_init_ring_data:
1489 hnae_put_handle(priv->ae_handle);
1490 priv->ae_handle = NULL;
1491out:
1492 return ret;
1493}
1494
1495static int hns_nic_notifier_action(struct notifier_block *nb,
1496 unsigned long action, void *data)
1497{
1498 struct hns_nic_priv *priv =
1499 container_of(nb, struct hns_nic_priv, notifier_block);
1500
1501 assert(action == HNAE_AE_REGISTER);
1502
1503 if (!hns_nic_try_get_ae(priv->netdev)) {
1504 hnae_unregister_notifier(&priv->notifier_block);
1505 priv->notifier_block.notifier_call = NULL;
1506 }
1507 return 0;
1508}
1509
1510static int hns_nic_dev_probe(struct platform_device *pdev)
1511{
1512 struct device *dev = &pdev->dev;
1513 struct net_device *ndev;
1514 struct hns_nic_priv *priv;
1515 struct device_node *node = dev->of_node;
1516 int ret;
1517
1518 ndev = alloc_etherdev_mq(sizeof(struct hns_nic_priv), NIC_MAX_Q_PER_VF);
1519 if (!ndev)
1520 return -ENOMEM;
1521
1522 platform_set_drvdata(pdev, ndev);
1523
1524 priv = netdev_priv(ndev);
1525 priv->dev = dev;
1526 priv->netdev = ndev;
1527
1528 if (of_device_is_compatible(node, "hisilicon,hns-nic-v2"))
1529 priv->enet_ver = AE_VERSION_2;
1530 else
1531 priv->enet_ver = AE_VERSION_1;
1532
1533 ret = of_property_read_string(node, "ae-name", &priv->ae_name);
1534 if (ret)
1535 goto out_read_string_fail;
1536
1537 ret = of_property_read_u32(node, "port-id", &priv->port_id);
1538 if (ret)
1539 goto out_read_string_fail;
1540
1541 hns_init_mac_addr(ndev);
1542
1543 ndev->watchdog_timeo = HNS_NIC_TX_TIMEOUT;
1544 ndev->priv_flags |= IFF_UNICAST_FLT;
1545 ndev->netdev_ops = &hns_nic_netdev_ops;
1546 hns_ethtool_set_ops(ndev);
1547 ndev->features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
1548 NETIF_F_RXCSUM | NETIF_F_SG | NETIF_F_GSO |
1549 NETIF_F_GRO;
1550 ndev->vlan_features |=
1551 NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM | NETIF_F_RXCSUM;
1552 ndev->vlan_features |= NETIF_F_SG | NETIF_F_GSO | NETIF_F_GRO;
1553
1554 SET_NETDEV_DEV(ndev, dev);
1555
1556 if (!dma_set_mask_and_coherent(dev, DMA_BIT_MASK(64)))
1557 dev_dbg(dev, "set mask to 64bit\n");
1558 else
1559 dev_err(dev, "set mask to 32bit fail!\n");
1560
1561 /* carrier off reporting is important to ethtool even BEFORE open */
1562 netif_carrier_off(ndev);
1563
1564 setup_timer(&priv->service_timer, hns_nic_service_timer,
1565 (unsigned long)priv);
1566 INIT_WORK(&priv->service_task, hns_nic_service_task);
1567
1568 set_bit(NIC_STATE_SERVICE_INITED, &priv->state);
1569 clear_bit(NIC_STATE_SERVICE_SCHED, &priv->state);
1570 set_bit(NIC_STATE_DOWN, &priv->state);
1571
1572 if (hns_nic_try_get_ae(priv->netdev)) {
1573 priv->notifier_block.notifier_call = hns_nic_notifier_action;
1574 ret = hnae_register_notifier(&priv->notifier_block);
1575 if (ret) {
1576 dev_err(dev, "register notifier fail!\n");
1577 goto out_notify_fail;
1578 }
1579 dev_dbg(dev, "has not handle, register notifier!\n");
1580 }
1581
1582 return 0;
1583
1584out_notify_fail:
1585 (void)cancel_work_sync(&priv->service_task);
1586out_read_string_fail:
1587 free_netdev(ndev);
1588 return ret;
1589}
1590
1591static int hns_nic_dev_remove(struct platform_device *pdev)
1592{
1593 struct net_device *ndev = platform_get_drvdata(pdev);
1594 struct hns_nic_priv *priv = netdev_priv(ndev);
1595
1596 if (ndev->reg_state != NETREG_UNINITIALIZED)
1597 unregister_netdev(ndev);
1598
1599 if (priv->ring_data)
1600 hns_nic_uninit_ring_data(priv);
1601 priv->ring_data = NULL;
1602
1603 if (priv->phy)
1604 phy_disconnect(priv->phy);
1605 priv->phy = NULL;
1606
1607 if (!IS_ERR_OR_NULL(priv->ae_handle))
1608 hnae_put_handle(priv->ae_handle);
1609 priv->ae_handle = NULL;
1610 if (priv->notifier_block.notifier_call)
1611 hnae_unregister_notifier(&priv->notifier_block);
1612 priv->notifier_block.notifier_call = NULL;
1613
1614 set_bit(NIC_STATE_REMOVING, &priv->state);
1615 (void)cancel_work_sync(&priv->service_task);
1616
1617 free_netdev(ndev);
1618 return 0;
1619}
1620
1621static const struct of_device_id hns_enet_of_match[] = {
1622 {.compatible = "hisilicon,hns-nic-v1",},
1623 {.compatible = "hisilicon,hns-nic-v2",},
1624 {},
1625};
1626
1627MODULE_DEVICE_TABLE(of, hns_enet_of_match);
1628
1629static struct platform_driver hns_nic_dev_driver = {
1630 .driver = {
1631 .name = "hns-nic",
1632 .owner = THIS_MODULE,
1633 .of_match_table = hns_enet_of_match,
1634 },
1635 .probe = hns_nic_dev_probe,
1636 .remove = hns_nic_dev_remove,
1637};
1638
1639module_platform_driver(hns_nic_dev_driver);
1640
1641MODULE_DESCRIPTION("HISILICON HNS Ethernet driver");
1642MODULE_AUTHOR("Hisilicon, Inc.");
1643MODULE_LICENSE("GPL");
1644MODULE_ALIAS("platform:hns-nic");
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