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UBUNTU: Ubuntu-4.10.0-37.41
[mirror_ubuntu-zesty-kernel.git] / drivers / net / ethernet / hisilicon / hns / hns_enet.c
CommitLineData
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"
44770e11 25#include "hns_dsaf_mac.h"
b5996f11 26
27#define NIC_MAX_Q_PER_VF 16
28#define HNS_NIC_TX_TIMEOUT (5 * HZ)
29
30#define SERVICE_TIMER_HZ (1 * HZ)
31
32#define NIC_TX_CLEAN_MAX_NUM 256
33#define NIC_RX_CLEAN_MAX_NUM 64
34
b5996f11 35#define RCB_IRQ_NOT_INITED 0
36#define RCB_IRQ_INITED 1
9cbe9fd5 37#define HNS_BUFFER_SIZE_2048 2048
b5996f11 38
13ac695e
S		 39#define BD_MAX_SEND_SIZE 8191
40#define SKB_TMP_LEN(SKB) \
41 (((SKB)->transport_header - (SKB)->mac_header) + tcp_hdrlen(SKB))
42
43static void fill_v2_desc(struct hnae_ring *ring, void *priv,
44 int size, dma_addr_t dma, int frag_end,
45 int buf_num, enum hns_desc_type type, int mtu)
46{
47 struct hnae_desc *desc = &ring->desc[ring->next_to_use];
48 struct hnae_desc_cb *desc_cb = &ring->desc_cb[ring->next_to_use];
49 struct iphdr *iphdr;
50 struct ipv6hdr *ipv6hdr;
51 struct sk_buff *skb;
13ac695e
S		 52 __be16 protocol;
53 u8 bn_pid = 0;
54 u8 rrcfv = 0;
55 u8 ip_offset = 0;
56 u8 tvsvsn = 0;
57 u16 mss = 0;
58 u8 l4_len = 0;
59 u16 paylen = 0;
60
61 desc_cb->priv = priv;
62 desc_cb->length = size;
63 desc_cb->dma = dma;
64 desc_cb->type = type;
65
66 desc->addr = cpu_to_le64(dma);
67 desc->tx.send_size = cpu_to_le16((u16)size);
68
f8a1a636 69 /* config bd buffer end */
13ac695e
S		 70 hnae_set_bit(rrcfv, HNSV2_TXD_VLD_B, 1);
71 hnae_set_field(bn_pid, HNSV2_TXD_BUFNUM_M, 0, buf_num - 1);
72
f8a1a636
SL		 73 /* fill port_id in the tx bd for sending management pkts */
74 hnae_set_field(bn_pid, HNSV2_TXD_PORTID_M,
75 HNSV2_TXD_PORTID_S, ring->q->handle->dport_id);
76
13ac695e
S		 77 if (type == DESC_TYPE_SKB) {
78 skb = (struct sk_buff *)priv;
79
80 if (skb->ip_summed == CHECKSUM_PARTIAL) {
81 skb_reset_mac_len(skb);
82 protocol = skb->protocol;
83 ip_offset = ETH_HLEN;
84
85 if (protocol == htons(ETH_P_8021Q)) {
86 ip_offset += VLAN_HLEN;
87 protocol = vlan_get_protocol(skb);
88 skb->protocol = protocol;
89 }
90
91 if (skb->protocol == htons(ETH_P_IP)) {
92 iphdr = ip_hdr(skb);
93 hnae_set_bit(rrcfv, HNSV2_TXD_L3CS_B, 1);
94 hnae_set_bit(rrcfv, HNSV2_TXD_L4CS_B, 1);
95
96 /* check for tcp/udp header */
0b51b1dc
DH		 97 if (iphdr->protocol == IPPROTO_TCP &&
98 skb_is_gso(skb)) {
13ac695e
S		 99 hnae_set_bit(tvsvsn,
100 HNSV2_TXD_TSE_B, 1);
13ac695e 101 l4_len = tcp_hdrlen(skb);
0b51b1dc
DH		 102 mss = skb_shinfo(skb)->gso_size;
103 paylen = skb->len - SKB_TMP_LEN(skb);
13ac695e
S		 104 }
105 } else if (skb->protocol == htons(ETH_P_IPV6)) {
106 hnae_set_bit(tvsvsn, HNSV2_TXD_IPV6_B, 1);
107 ipv6hdr = ipv6_hdr(skb);
108 hnae_set_bit(rrcfv, HNSV2_TXD_L4CS_B, 1);
109
110 /* check for tcp/udp header */
0b51b1dc
DH		 111 if (ipv6hdr->nexthdr == IPPROTO_TCP &&
112 skb_is_gso(skb) && skb_is_gso_v6(skb)) {
13ac695e
S		 113 hnae_set_bit(tvsvsn,
114 HNSV2_TXD_TSE_B, 1);
13ac695e 115 l4_len = tcp_hdrlen(skb);
0b51b1dc
DH		 116 mss = skb_shinfo(skb)->gso_size;
117 paylen = skb->len - SKB_TMP_LEN(skb);
13ac695e
S		 118 }
119 }
120 desc->tx.ip_offset = ip_offset;
121 desc->tx.tse_vlan_snap_v6_sctp_nth = tvsvsn;
122 desc->tx.mss = cpu_to_le16(mss);
123 desc->tx.l4_len = l4_len;
124 desc->tx.paylen = cpu_to_le16(paylen);
125 }
126 }
127
128 hnae_set_bit(rrcfv, HNSV2_TXD_FE_B, frag_end);
129
130 desc->tx.bn_pid = bn_pid;
131 desc->tx.ra_ri_cs_fe_vld = rrcfv;
132
133 ring_ptr_move_fw(ring, next_to_use);
134}
135
63434888
KY		 136static const struct acpi_device_id hns_enet_acpi_match[] = {
137 { "HISI00C1", 0 },
138 { "HISI00C2", 0 },
139 { },
140};
141MODULE_DEVICE_TABLE(acpi, hns_enet_acpi_match);
142
b5996f11 143static void fill_desc(struct hnae_ring *ring, void *priv,
144 int size, dma_addr_t dma, int frag_end,
13ac695e 145 int buf_num, enum hns_desc_type type, int mtu)
b5996f11 146{
147 struct hnae_desc *desc = &ring->desc[ring->next_to_use];
148 struct hnae_desc_cb *desc_cb = &ring->desc_cb[ring->next_to_use];
149 struct sk_buff *skb;
150 __be16 protocol;
151 u32 ip_offset;
152 u32 asid_bufnum_pid = 0;
153 u32 flag_ipoffset = 0;
154
155 desc_cb->priv = priv;
156 desc_cb->length = size;
157 desc_cb->dma = dma;
158 desc_cb->type = type;
159
160 desc->addr = cpu_to_le64(dma);
161 desc->tx.send_size = cpu_to_le16((u16)size);
162
163 /*config bd buffer end */
164 flag_ipoffset |= 1 << HNS_TXD_VLD_B;
165
166 asid_bufnum_pid |= buf_num << HNS_TXD_BUFNUM_S;
167
168 if (type == DESC_TYPE_SKB) {
169 skb = (struct sk_buff *)priv;
170
171 if (skb->ip_summed == CHECKSUM_PARTIAL) {
172 protocol = skb->protocol;
173 ip_offset = ETH_HLEN;
174
175 /*if it is a SW VLAN check the next protocol*/
176 if (protocol == htons(ETH_P_8021Q)) {
177 ip_offset += VLAN_HLEN;
178 protocol = vlan_get_protocol(skb);
179 skb->protocol = protocol;
180 }
181
182 if (skb->protocol == htons(ETH_P_IP)) {
183 flag_ipoffset |= 1 << HNS_TXD_L3CS_B;
184 /* check for tcp/udp header */
185 flag_ipoffset |= 1 << HNS_TXD_L4CS_B;
186
187 } else if (skb->protocol == htons(ETH_P_IPV6)) {
188 /* ipv6 has not l3 cs, check for L4 header */
189 flag_ipoffset |= 1 << HNS_TXD_L4CS_B;
190 }
191
192 flag_ipoffset |= ip_offset << HNS_TXD_IPOFFSET_S;
193 }
194 }
195
196 flag_ipoffset |= frag_end << HNS_TXD_FE_B;
197
198 desc->tx.asid_bufnum_pid = cpu_to_le16(asid_bufnum_pid);
199 desc->tx.flag_ipoffset = cpu_to_le32(flag_ipoffset);
200
201 ring_ptr_move_fw(ring, next_to_use);
202}
203
204static void unfill_desc(struct hnae_ring *ring)
205{
206 ring_ptr_move_bw(ring, next_to_use);
207}
208
13ac695e
S		 209static int hns_nic_maybe_stop_tx(
210 struct sk_buff **out_skb, int *bnum, struct hnae_ring *ring)
b5996f11 211{
13ac695e
S		 212 struct sk_buff *skb = *out_skb;
213 struct sk_buff *new_skb = NULL;
b5996f11 214 int buf_num;
b5996f11 215
216 /* no. of segments (plus a header) */
217 buf_num = skb_shinfo(skb)->nr_frags + 1;
218
219 if (unlikely(buf_num > ring->max_desc_num_per_pkt)) {
13ac695e
S		 220 if (ring_space(ring) < 1)
221 return -EBUSY;
b5996f11 222
223 new_skb = skb_copy(skb, GFP_ATOMIC);
13ac695e
S		 224 if (!new_skb)
225 return -ENOMEM;
b5996f11 226
227 dev_kfree_skb_any(skb);
13ac695e 228 *out_skb = new_skb;
b5996f11 229 buf_num = 1;
b5996f11 230 } else if (buf_num > ring_space(ring)) {
13ac695e
S		 231 return -EBUSY;
232 }
233
234 *bnum = buf_num;
235 return 0;
236}
237
64353af6
S		 238static int hns_nic_maybe_stop_tso(
239 struct sk_buff **out_skb, int *bnum, struct hnae_ring *ring)
240{
241 int i;
242 int size;
243 int buf_num;
244 int frag_num;
245 struct sk_buff *skb = *out_skb;
246 struct sk_buff *new_skb = NULL;
247 struct skb_frag_struct *frag;
248
249 size = skb_headlen(skb);
250 buf_num = (size + BD_MAX_SEND_SIZE - 1) / BD_MAX_SEND_SIZE;
251
252 frag_num = skb_shinfo(skb)->nr_frags;
253 for (i = 0; i < frag_num; i++) {
254 frag = &skb_shinfo(skb)->frags[i];
255 size = skb_frag_size(frag);
256 buf_num += (size + BD_MAX_SEND_SIZE - 1) / BD_MAX_SEND_SIZE;
257 }
258
259 if (unlikely(buf_num > ring->max_desc_num_per_pkt)) {
260 buf_num = (skb->len + BD_MAX_SEND_SIZE - 1) / BD_MAX_SEND_SIZE;
261 if (ring_space(ring) < buf_num)
262 return -EBUSY;
263 /* manual split the send packet */
264 new_skb = skb_copy(skb, GFP_ATOMIC);
265 if (!new_skb)
266 return -ENOMEM;
267 dev_kfree_skb_any(skb);
268 *out_skb = new_skb;
269
270 } else if (ring_space(ring) < buf_num) {
271 return -EBUSY;
272 }
273
274 *bnum = buf_num;
275 return 0;
276}
277
278static void fill_tso_desc(struct hnae_ring *ring, void *priv,
279 int size, dma_addr_t dma, int frag_end,
280 int buf_num, enum hns_desc_type type, int mtu)
281{
282 int frag_buf_num;
283 int sizeoflast;
284 int k;
285
286 frag_buf_num = (size + BD_MAX_SEND_SIZE - 1) / BD_MAX_SEND_SIZE;
287 sizeoflast = size % BD_MAX_SEND_SIZE;
288 sizeoflast = sizeoflast ? sizeoflast : BD_MAX_SEND_SIZE;
289
290 /* when the frag size is bigger than hardware, split this frag */
291 for (k = 0; k < frag_buf_num; k++)
292 fill_v2_desc(ring, priv,
293 (k == frag_buf_num - 1) ?
294 sizeoflast : BD_MAX_SEND_SIZE,
295 dma + BD_MAX_SEND_SIZE * k,
296 frag_end && (k == frag_buf_num - 1) ? 1 : 0,
297 buf_num,
298 (type == DESC_TYPE_SKB && !k) ?
299 DESC_TYPE_SKB : DESC_TYPE_PAGE,
300 mtu);
301}
302
25b1d520
YL		 303netdev_tx_t hns_nic_net_xmit_hw(struct net_device *ndev,
304 struct sk_buff *skb,
305 struct hns_nic_ring_data *ring_data)
13ac695e
S		 306{
307 struct hns_nic_priv *priv = netdev_priv(ndev);
13ac695e 308 struct hnae_ring *ring = ring_data->ring;
b85ea006 309 struct device *dev = ring_to_dev(ring);
13ac695e
S		 310 struct netdev_queue *dev_queue;
311 struct skb_frag_struct *frag;
312 int buf_num;
313 int seg_num;
314 dma_addr_t dma;
315 int size, next_to_use;
316 int i;
317
318 switch (priv->ops.maybe_stop_tx(&skb, &buf_num, ring)) {
319 case -EBUSY:
b5996f11 320 ring->stats.tx_busy++;
321 goto out_net_tx_busy;
13ac695e
S		 322 case -ENOMEM:
323 ring->stats.sw_err_cnt++;
324 netdev_err(ndev, "no memory to xmit!\n");
325 goto out_err_tx_ok;
326 default:
327 break;
b5996f11 328 }
13ac695e
S		 329
330 /* no. of segments (plus a header) */
331 seg_num = skb_shinfo(skb)->nr_frags + 1;
b5996f11 332 next_to_use = ring->next_to_use;
333
334 /* fill the first part */
335 size = skb_headlen(skb);
336 dma = dma_map_single(dev, skb->data, size, DMA_TO_DEVICE);
337 if (dma_mapping_error(dev, dma)) {
338 netdev_err(ndev, "TX head DMA map failed\n");
339 ring->stats.sw_err_cnt++;
340 goto out_err_tx_ok;
341 }
13ac695e
S		 342 priv->ops.fill_desc(ring, skb, size, dma, seg_num == 1 ? 1 : 0,
343 buf_num, DESC_TYPE_SKB, ndev->mtu);
b5996f11 344
345 /* fill the fragments */
13ac695e 346 for (i = 1; i < seg_num; i++) {
b5996f11 347 frag = &skb_shinfo(skb)->frags[i - 1];
348 size = skb_frag_size(frag);
349 dma = skb_frag_dma_map(dev, frag, 0, size, DMA_TO_DEVICE);
350 if (dma_mapping_error(dev, dma)) {
351 netdev_err(ndev, "TX frag(%d) DMA map failed\n", i);
352 ring->stats.sw_err_cnt++;
353 goto out_map_frag_fail;
354 }
13ac695e
S		 355 priv->ops.fill_desc(ring, skb_frag_page(frag), size, dma,
356 seg_num - 1 == i ? 1 : 0, buf_num,
357 DESC_TYPE_PAGE, ndev->mtu);
b5996f11 358 }
359
360 /*complete translate all packets*/
361 dev_queue = netdev_get_tx_queue(ndev, skb->queue_mapping);
362 netdev_tx_sent_queue(dev_queue, skb->len);
363
25b1d520
YL		 364 netif_trans_update(ndev);
365 ndev->stats.tx_bytes += skb->len;
366 ndev->stats.tx_packets++;
367
b5996f11 368 wmb(); /* commit all data before submit */
369 assert(skb->queue_mapping < priv->ae_handle->q_num);
370 hnae_queue_xmit(priv->ae_handle->qs[skb->queue_mapping], buf_num);
371 ring->stats.tx_pkts++;
372 ring->stats.tx_bytes += skb->len;
373
374 return NETDEV_TX_OK;
375
376out_map_frag_fail:
377
13ac695e 378 while (ring->next_to_use != next_to_use) {
b5996f11 379 unfill_desc(ring);
13ac695e
S		 380 if (ring->next_to_use != next_to_use)
381 dma_unmap_page(dev,
382 ring->desc_cb[ring->next_to_use].dma,
383 ring->desc_cb[ring->next_to_use].length,
384 DMA_TO_DEVICE);
385 else
386 dma_unmap_single(dev,
387 ring->desc_cb[next_to_use].dma,
388 ring->desc_cb[next_to_use].length,
389 DMA_TO_DEVICE);
b5996f11 390 }
391
b5996f11 392out_err_tx_ok:
393
394 dev_kfree_skb_any(skb);
395 return NETDEV_TX_OK;
396
397out_net_tx_busy:
398
399 netif_stop_subqueue(ndev, skb->queue_mapping);
400
401 /* Herbert's original patch had:
402 * smp_mb__after_netif_stop_queue();
403 * but since that doesn't exist yet, just open code it.
404 */
405 smp_mb();
406 return NETDEV_TX_BUSY;
407}
408
409/**
410 * hns_nic_get_headlen - determine size of header for RSC/LRO/GRO/FCOE
411 * @data: pointer to the start of the headers
412 * @max: total length of section to find headers in
413 *
414 * This function is meant to determine the length of headers that will
415 * be recognized by hardware for LRO, GRO, and RSC offloads. The main
416 * motivation of doing this is to only perform one pull for IPv4 TCP
417 * packets so that we can do basic things like calculating the gso_size
418 * based on the average data per packet.
419 **/
420static unsigned int hns_nic_get_headlen(unsigned char *data, u32 flag,
421 unsigned int max_size)
422{
423 unsigned char *network;
424 u8 hlen;
425
426 /* this should never happen, but better safe than sorry */
427 if (max_size < ETH_HLEN)
428 return max_size;
429
430 /* initialize network frame pointer */
431 network = data;
432
433 /* set first protocol and move network header forward */
434 network += ETH_HLEN;
435
436 /* handle any vlan tag if present */
437 if (hnae_get_field(flag, HNS_RXD_VLAN_M, HNS_RXD_VLAN_S)
438 == HNS_RX_FLAG_VLAN_PRESENT) {
439 if ((typeof(max_size))(network - data) > (max_size - VLAN_HLEN))
440 return max_size;
441
442 network += VLAN_HLEN;
443 }
444
445 /* handle L3 protocols */
446 if (hnae_get_field(flag, HNS_RXD_L3ID_M, HNS_RXD_L3ID_S)
447 == HNS_RX_FLAG_L3ID_IPV4) {
448 if ((typeof(max_size))(network - data) >
449 (max_size - sizeof(struct iphdr)))
450 return max_size;
451
452 /* access ihl as a u8 to avoid unaligned access on ia64 */
453 hlen = (network[0] & 0x0F) << 2;
454
455 /* verify hlen meets minimum size requirements */
456 if (hlen < sizeof(struct iphdr))
457 return network - data;
458
459 /* record next protocol if header is present */
460 } else if (hnae_get_field(flag, HNS_RXD_L3ID_M, HNS_RXD_L3ID_S)
461 == HNS_RX_FLAG_L3ID_IPV6) {
462 if ((typeof(max_size))(network - data) >
463 (max_size - sizeof(struct ipv6hdr)))
464 return max_size;
465
466 /* record next protocol */
467 hlen = sizeof(struct ipv6hdr);
468 } else {
469 return network - data;
470 }
471
472 /* relocate pointer to start of L4 header */
473 network += hlen;
474
475 /* finally sort out TCP/UDP */
476 if (hnae_get_field(flag, HNS_RXD_L4ID_M, HNS_RXD_L4ID_S)
477 == HNS_RX_FLAG_L4ID_TCP) {
478 if ((typeof(max_size))(network - data) >
479 (max_size - sizeof(struct tcphdr)))
480 return max_size;
481
482 /* access doff as a u8 to avoid unaligned access on ia64 */
483 hlen = (network[12] & 0xF0) >> 2;
484
485 /* verify hlen meets minimum size requirements */
486 if (hlen < sizeof(struct tcphdr))
487 return network - data;
488
489 network += hlen;
490 } else if (hnae_get_field(flag, HNS_RXD_L4ID_M, HNS_RXD_L4ID_S)
491 == HNS_RX_FLAG_L4ID_UDP) {
492 if ((typeof(max_size))(network - data) >
493 (max_size - sizeof(struct udphdr)))
494 return max_size;
495
496 network += sizeof(struct udphdr);
497 }
498
499 /* If everything has gone correctly network should be the
500 * data section of the packet and will be the end of the header.
501 * If not then it probably represents the end of the last recognized
502 * header.
503 */
504 if ((typeof(max_size))(network - data) < max_size)
505 return network - data;
506 else
507 return max_size;
508}
509
9cbe9fd5 510static void hns_nic_reuse_page(struct sk_buff *skb, int i,
511 struct hnae_ring *ring, int pull_len,
512 struct hnae_desc_cb *desc_cb)
b5996f11 513{
9cbe9fd5 514 struct hnae_desc *desc;
515 int truesize, size;
516 int last_offset;
be78a690
AB		 517 bool twobufs;
518
a82e6438
S		 519 twobufs = ((PAGE_SIZE < 8192) &&
520 hnae_buf_size(ring) == HNS_BUFFER_SIZE_2048);
9cbe9fd5 521
522 desc = &ring->desc[ring->next_to_clean];
523 size = le16_to_cpu(desc->rx.size);
524
be78a690 525 if (twobufs) {
9cbe9fd5 526 truesize = hnae_buf_size(ring);
527 } else {
528 truesize = ALIGN(size, L1_CACHE_BYTES);
529 last_offset = hnae_page_size(ring) - hnae_buf_size(ring);
530 }
531
9cbe9fd5 532 skb_add_rx_frag(skb, i, desc_cb->priv, desc_cb->page_offset + pull_len,
533 size - pull_len, truesize - pull_len);
534
b5996f11 535 /* avoid re-using remote pages,flag default unreuse */
be78a690
AB		 536 if (unlikely(page_to_nid(desc_cb->priv) != numa_node_id()))
537 return;
538
539 if (twobufs) {
540 /* if we are only owner of page we can reuse it */
541 if (likely(page_count(desc_cb->priv) == 1)) {
542 /* flip page offset to other buffer */
543 desc_cb->page_offset ^= truesize;
b5996f11 544
b5996f11 545 desc_cb->reuse_flag = 1;
546 /* bump ref count on page before it is given*/
547 get_page(desc_cb->priv);
548 }
be78a690
AB		 549 return;
550 }
551
552 /* move offset up to the next cache line */
553 desc_cb->page_offset += truesize;
554
555 if (desc_cb->page_offset <= last_offset) {
556 desc_cb->reuse_flag = 1;
557 /* bump ref count on page before it is given*/
558 get_page(desc_cb->priv);
b5996f11 559 }
560}
561
13ac695e
S		 562static void get_v2rx_desc_bnum(u32 bnum_flag, int *out_bnum)
563{
564 *out_bnum = hnae_get_field(bnum_flag,
565 HNS_RXD_BUFNUM_M, HNS_RXD_BUFNUM_S) + 1;
566}
567
568static void get_rx_desc_bnum(u32 bnum_flag, int *out_bnum)
569{
570 *out_bnum = hnae_get_field(bnum_flag,
571 HNS_RXD_BUFNUM_M, HNS_RXD_BUFNUM_S);
572}
573
862b3d20
S		 574static void hns_nic_rx_checksum(struct hns_nic_ring_data *ring_data,
575 struct sk_buff *skb, u32 flag)
576{
577 struct net_device *netdev = ring_data->napi.dev;
578 u32 l3id;
579 u32 l4id;
580
581 /* check if RX checksum offload is enabled */
582 if (unlikely(!(netdev->features & NETIF_F_RXCSUM)))
583 return;
584
585 /* In hardware, we only support checksum for the following protocols:
586 * 1) IPv4,
587 * 2) TCP(over IPv4 or IPv6),
588 * 3) UDP(over IPv4 or IPv6),
589 * 4) SCTP(over IPv4 or IPv6)
590 * but we support many L3(IPv4, IPv6, MPLS, PPPoE etc) and L4(TCP,
591 * UDP, GRE, SCTP, IGMP, ICMP etc.) protocols.
592 *
593 * Hardware limitation:
594 * Our present hardware RX Descriptor lacks L3/L4 checksum "Status &
595 * Error" bit (which usually can be used to indicate whether checksum
596 * was calculated by the hardware and if there was any error encountered
597 * during checksum calculation).
598 *
599 * Software workaround:
600 * We do get info within the RX descriptor about the kind of L3/L4
601 * protocol coming in the packet and the error status. These errors
602 * might not just be checksum errors but could be related to version,
603 * length of IPv4, UDP, TCP etc.
604 * Because there is no-way of knowing if it is a L3/L4 error due to bad
605 * checksum or any other L3/L4 error, we will not (cannot) convey
606 * checksum status for such cases to upper stack and will not maintain
607 * the RX L3/L4 checksum counters as well.
608 */
609
610 l3id = hnae_get_field(flag, HNS_RXD_L3ID_M, HNS_RXD_L3ID_S);
611 l4id = hnae_get_field(flag, HNS_RXD_L4ID_M, HNS_RXD_L4ID_S);
612
613 /* check L3 protocol for which checksum is supported */
614 if ((l3id != HNS_RX_FLAG_L3ID_IPV4) && (l3id != HNS_RX_FLAG_L3ID_IPV6))
615 return;
616
617 /* check for any(not just checksum)flagged L3 protocol errors */
618 if (unlikely(hnae_get_bit(flag, HNS_RXD_L3E_B)))
619 return;
620
621 /* we do not support checksum of fragmented packets */
622 if (unlikely(hnae_get_bit(flag, HNS_RXD_FRAG_B)))
623 return;
624
625 /* check L4 protocol for which checksum is supported */
626 if ((l4id != HNS_RX_FLAG_L4ID_TCP) &&
627 (l4id != HNS_RX_FLAG_L4ID_UDP) &&
628 (l4id != HNS_RX_FLAG_L4ID_SCTP))
629 return;
630
631 /* check for any(not just checksum)flagged L4 protocol errors */
632 if (unlikely(hnae_get_bit(flag, HNS_RXD_L4E_B)))
633 return;
634
635 /* now, this has to be a packet with valid RX checksum */
636 skb->ip_summed = CHECKSUM_UNNECESSARY;
637}
638
b5996f11 639static int hns_nic_poll_rx_skb(struct hns_nic_ring_data *ring_data,
640 struct sk_buff **out_skb, int *out_bnum)
641{
642 struct hnae_ring *ring = ring_data->ring;
643 struct net_device *ndev = ring_data->napi.dev;
13ac695e 644 struct hns_nic_priv *priv = netdev_priv(ndev);
b5996f11 645 struct sk_buff *skb;
646 struct hnae_desc *desc;
647 struct hnae_desc_cb *desc_cb;
648 unsigned char *va;
9cbe9fd5 649 int bnum, length, i;
b5996f11 650 int pull_len;
651 u32 bnum_flag;
652
b5996f11 653 desc = &ring->desc[ring->next_to_clean];
654 desc_cb = &ring->desc_cb[ring->next_to_clean];
13ac695e
S		 655
656 prefetch(desc);
657
b5996f11 658 va = (unsigned char *)desc_cb->buf + desc_cb->page_offset;
659
13ac695e
S		 660 /* prefetch first cache line of first page */
661 prefetch(va);
662#if L1_CACHE_BYTES < 128
663 prefetch(va + L1_CACHE_BYTES);
664#endif
665
666 skb = *out_skb = napi_alloc_skb(&ring_data->napi,
667 HNS_RX_HEAD_SIZE);
b5996f11 668 if (unlikely(!skb)) {
669 netdev_err(ndev, "alloc rx skb fail\n");
670 ring->stats.sw_err_cnt++;
671 return -ENOMEM;
672 }
673
9cbe9fd5 674 prefetchw(skb->data);
13ac695e
S		 675 length = le16_to_cpu(desc->rx.pkt_len);
676 bnum_flag = le32_to_cpu(desc->rx.ipoff_bnum_pid_flag);
677 priv->ops.get_rxd_bnum(bnum_flag, &bnum);
678 *out_bnum = bnum;
679
b5996f11 680 if (length <= HNS_RX_HEAD_SIZE) {
681 memcpy(__skb_put(skb, length), va, ALIGN(length, sizeof(long)));
682
683 /* we can reuse buffer as-is, just make sure it is local */
684 if (likely(page_to_nid(desc_cb->priv) == numa_node_id()))
685 desc_cb->reuse_flag = 1;
686 else /* this page cannot be reused so discard it */
687 put_page(desc_cb->priv);
688
689 ring_ptr_move_fw(ring, next_to_clean);
690
691 if (unlikely(bnum != 1)) { /* check err*/
692 *out_bnum = 1;
693 goto out_bnum_err;
694 }
695 } else {
696 ring->stats.seg_pkt_cnt++;
697
698 pull_len = hns_nic_get_headlen(va, bnum_flag, HNS_RX_HEAD_SIZE);
699 memcpy(__skb_put(skb, pull_len), va,
700 ALIGN(pull_len, sizeof(long)));
701
9cbe9fd5 702 hns_nic_reuse_page(skb, 0, ring, pull_len, desc_cb);
b5996f11 703 ring_ptr_move_fw(ring, next_to_clean);
704
705 if (unlikely(bnum >= (int)MAX_SKB_FRAGS)) { /* check err*/
706 *out_bnum = 1;
707 goto out_bnum_err;
708 }
709 for (i = 1; i < bnum; i++) {
710 desc = &ring->desc[ring->next_to_clean];
711 desc_cb = &ring->desc_cb[ring->next_to_clean];
b5996f11 712
9cbe9fd5 713 hns_nic_reuse_page(skb, i, ring, 0, desc_cb);
b5996f11 714 ring_ptr_move_fw(ring, next_to_clean);
715 }
716 }
717
718 /* check except process, free skb and jump the desc */
719 if (unlikely((!bnum) || (bnum > ring->max_desc_num_per_pkt))) {
720out_bnum_err:
721 *out_bnum = *out_bnum ? *out_bnum : 1; /* ntc moved,cannot 0*/
722 netdev_err(ndev, "invalid bnum(%d,%d,%d,%d),%016llx,%016llx\n",
723 bnum, ring->max_desc_num_per_pkt,
724 length, (int)MAX_SKB_FRAGS,
725 ((u64 *)desc)[0], ((u64 *)desc)[1]);
726 ring->stats.err_bd_num++;
727 dev_kfree_skb_any(skb);
728 return -EDOM;
729 }
730
731 bnum_flag = le32_to_cpu(desc->rx.ipoff_bnum_pid_flag);
732
733 if (unlikely(!hnae_get_bit(bnum_flag, HNS_RXD_VLD_B))) {
734 netdev_err(ndev, "no valid bd,%016llx,%016llx\n",
735 ((u64 *)desc)[0], ((u64 *)desc)[1]);
736 ring->stats.non_vld_descs++;
737 dev_kfree_skb_any(skb);
738 return -EINVAL;
739 }
740
741 if (unlikely((!desc->rx.pkt_len) ||
742 hnae_get_bit(bnum_flag, HNS_RXD_DROP_B))) {
b5996f11 743 ring->stats.err_pkt_len++;
744 dev_kfree_skb_any(skb);
745 return -EFAULT;
746 }
747
748 if (unlikely(hnae_get_bit(bnum_flag, HNS_RXD_L2E_B))) {
b5996f11 749 ring->stats.l2_err++;
750 dev_kfree_skb_any(skb);
751 return -EFAULT;
752 }
753
754 ring->stats.rx_pkts++;
755 ring->stats.rx_bytes += skb->len;
756
862b3d20
S		 757 /* indicate to upper stack if our hardware has already calculated
758 * the RX checksum
759 */
760 hns_nic_rx_checksum(ring_data, skb, bnum_flag);
b5996f11 761
762 return 0;
763}
764
765static void
766hns_nic_alloc_rx_buffers(struct hns_nic_ring_data *ring_data, int cleand_count)
767{
768 int i, ret;
769 struct hnae_desc_cb res_cbs;
770 struct hnae_desc_cb *desc_cb;
771 struct hnae_ring *ring = ring_data->ring;
772 struct net_device *ndev = ring_data->napi.dev;
773
774 for (i = 0; i < cleand_count; i++) {
775 desc_cb = &ring->desc_cb[ring->next_to_use];
776 if (desc_cb->reuse_flag) {
777 ring->stats.reuse_pg_cnt++;
778 hnae_reuse_buffer(ring, ring->next_to_use);
779 } else {
780 ret = hnae_reserve_buffer_map(ring, &res_cbs);
781 if (ret) {
782 ring->stats.sw_err_cnt++;
783 netdev_err(ndev, "hnae reserve buffer map failed.\n");
784 break;
785 }
786 hnae_replace_buffer(ring, ring->next_to_use, &res_cbs);
787 }
788
789 ring_ptr_move_fw(ring, next_to_use);
790 }
791
792 wmb(); /* make all data has been write before submit */
793 writel_relaxed(i, ring->io_base + RCB_REG_HEAD);
794}
795
796/* return error number for error or number of desc left to take
797 */
798static void hns_nic_rx_up_pro(struct hns_nic_ring_data *ring_data,
799 struct sk_buff *skb)
800{
801 struct net_device *ndev = ring_data->napi.dev;
802
803 skb->protocol = eth_type_trans(skb, ndev);
804 (void)napi_gro_receive(&ring_data->napi, skb);
805 ndev->last_rx = jiffies;
806}
807
0e97cd4e 808static int hns_desc_unused(struct hnae_ring *ring)
809{
810 int ntc = ring->next_to_clean;
811 int ntu = ring->next_to_use;
812
813 return ((ntc >= ntu) ? 0 : ring->desc_num) + ntc - ntu;
814}
815
b5996f11 816static int hns_nic_rx_poll_one(struct hns_nic_ring_data *ring_data,
817 int budget, void *v)
818{
819 struct hnae_ring *ring = ring_data->ring;
820 struct sk_buff *skb;
34447271 821 int num, bnum;
b5996f11 822#define RCB_NOF_ALLOC_RX_BUFF_ONCE 16
823 int recv_pkts, recv_bds, clean_count, err;
0e97cd4e 824 int unused_count = hns_desc_unused(ring);
b5996f11 825
826 num = readl_relaxed(ring->io_base + RCB_REG_FBDNUM);
827 rmb(); /* make sure num taken effect before the other data is touched */
828
829 recv_pkts = 0, recv_bds = 0, clean_count = 0;
0e97cd4e 830 num -= unused_count;
34447271 831
b5996f11 832 while (recv_pkts < budget && recv_bds < num) {
6ba312eb 833 /* reuse or realloc buffers */
0e97cd4e 834 if (clean_count + unused_count >= RCB_NOF_ALLOC_RX_BUFF_ONCE) {
835 hns_nic_alloc_rx_buffers(ring_data,
836 clean_count + unused_count);
b5996f11 837 clean_count = 0;
0e97cd4e 838 unused_count = hns_desc_unused(ring);
b5996f11 839 }
840
6ba312eb 841 /* poll one pkt */
b5996f11 842 err = hns_nic_poll_rx_skb(ring_data, &skb, &bnum);
843 if (unlikely(!skb)) /* this fault cannot be repaired */
3a31b64e 844 goto out;
b5996f11 845
846 recv_bds += bnum;
847 clean_count += bnum;
848 if (unlikely(err)) { /* do jump the err */
849 recv_pkts++;
850 continue;
851 }
852
853 /* do update ip stack process*/
854 ((void (*)(struct hns_nic_ring_data *, struct sk_buff *))v)(
855 ring_data, skb);
856 recv_pkts++;
857 }
858
3a31b64e 859out:
13ac695e 860 /* make all data has been write before submit */
0e97cd4e 861 if (clean_count + unused_count > 0)
862 hns_nic_alloc_rx_buffers(ring_data,
863 clean_count + unused_count);
13ac695e 864
b5996f11 865 return recv_pkts;
866}
867
bccd2711 868static bool hns_nic_rx_fini_pro(struct hns_nic_ring_data *ring_data)
b5996f11 869{
870 struct hnae_ring *ring = ring_data->ring;
871 int num = 0;
872
cee5add4
DH		 873 ring_data->ring->q->handle->dev->ops->toggle_ring_irq(ring, 0);
874
b5996f11 875 /* for hardware bug fixed */
876 num = readl_relaxed(ring->io_base + RCB_REG_FBDNUM);
877
878 if (num > 0) {
879 ring_data->ring->q->handle->dev->ops->toggle_ring_irq(
880 ring_data->ring, 1);
881
bccd2711 882 return false;
883 } else {
884 return true;
b5996f11 885 }
886}
887
bccd2711 888static bool hns_nic_rx_fini_pro_v2(struct hns_nic_ring_data *ring_data)
cee5add4
DH		 889{
890 struct hnae_ring *ring = ring_data->ring;
bccd2711 891 int num;
cee5add4
DH		 892
893 num = readl_relaxed(ring->io_base + RCB_REG_FBDNUM);
894
bccd2711 895 if (!num)
896 return true;
cee5add4 897 else
bccd2711 898 return false;
cee5add4
DH		 899}
900
b5996f11 901static inline void hns_nic_reclaim_one_desc(struct hnae_ring *ring,
902 int *bytes, int *pkts)
903{
904 struct hnae_desc_cb *desc_cb = &ring->desc_cb[ring->next_to_clean];
905
906 (*pkts) += (desc_cb->type == DESC_TYPE_SKB);
907 (*bytes) += desc_cb->length;
908 /* desc_cb will be cleaned, after hnae_free_buffer_detach*/
909 hnae_free_buffer_detach(ring, ring->next_to_clean);
910
911 ring_ptr_move_fw(ring, next_to_clean);
912}
913
914static int is_valid_clean_head(struct hnae_ring *ring, int h)
915{
916 int u = ring->next_to_use;
917 int c = ring->next_to_clean;
918
919 if (unlikely(h > ring->desc_num))
920 return 0;
921
922 assert(u > 0 && u < ring->desc_num);
923 assert(c > 0 && c < ring->desc_num);
924 assert(u != c && h != c); /* must be checked before call this func */
925
926 return u > c ? (h > c && h <= u) : (h > c || h <= u);
927}
928
929/* netif_tx_lock will turn down the performance, set only when necessary */
930#ifdef CONFIG_NET_POLL_CONTROLLER
a82e6438
S		 931#define NETIF_TX_LOCK(ring) spin_lock(&(ring)->lock)
932#define NETIF_TX_UNLOCK(ring) spin_unlock(&(ring)->lock)
b5996f11 933#else
74800fc9 934#define NETIF_TX_LOCK(ring)
935#define NETIF_TX_UNLOCK(ring)
b5996f11 936#endif
74800fc9 937
b5996f11 938/* reclaim all desc in one budget
939 * return error or number of desc left
940 */
941static int hns_nic_tx_poll_one(struct hns_nic_ring_data *ring_data,
942 int budget, void *v)
943{
944 struct hnae_ring *ring = ring_data->ring;
945 struct net_device *ndev = ring_data->napi.dev;
946 struct netdev_queue *dev_queue;
947 struct hns_nic_priv *priv = netdev_priv(ndev);
948 int head;
949 int bytes, pkts;
950
74800fc9 951 NETIF_TX_LOCK(ring);
b5996f11 952
953 head = readl_relaxed(ring->io_base + RCB_REG_HEAD);
954 rmb(); /* make sure head is ready before touch any data */
955
956 if (is_ring_empty(ring) || head == ring->next_to_clean) {
74800fc9 957 NETIF_TX_UNLOCK(ring);
b5996f11 958 return 0; /* no data to poll */
959 }
960
961 if (!is_valid_clean_head(ring, head)) {
962 netdev_err(ndev, "wrong head (%d, %d-%d)\n", head,
963 ring->next_to_use, ring->next_to_clean);
964 ring->stats.io_err_cnt++;
74800fc9 965 NETIF_TX_UNLOCK(ring);
b5996f11 966 return -EIO;
967 }
968
969 bytes = 0;
970 pkts = 0;
9cbe9fd5 971 while (head != ring->next_to_clean) {
b5996f11 972 hns_nic_reclaim_one_desc(ring, &bytes, &pkts);
9cbe9fd5 973 /* issue prefetch for next Tx descriptor */
974 prefetch(&ring->desc_cb[ring->next_to_clean]);
975 }
b5996f11 976
74800fc9 977 NETIF_TX_UNLOCK(ring);
b5996f11 978
979 dev_queue = netdev_get_tx_queue(ndev, ring_data->queue_index);
980 netdev_tx_completed_queue(dev_queue, pkts, bytes);
981
13ac695e
S		 982 if (unlikely(priv->link && !netif_carrier_ok(ndev)))
983 netif_carrier_on(ndev);
984
b5996f11 985 if (unlikely(pkts && netif_carrier_ok(ndev) &&
986 (ring_space(ring) >= ring->max_desc_num_per_pkt * 2))) {
987 /* Make sure that anybody stopping the queue after this
988 * sees the new next_to_clean.
989 */
990 smp_mb();
991 if (netif_tx_queue_stopped(dev_queue) &&
992 !test_bit(NIC_STATE_DOWN, &priv->state)) {
993 netif_tx_wake_queue(dev_queue);
994 ring->stats.restart_queue++;
995 }
996 }
997 return 0;
998}
999
bccd2711 1000static bool hns_nic_tx_fini_pro(struct hns_nic_ring_data *ring_data)
b5996f11 1001{
1002 struct hnae_ring *ring = ring_data->ring;
cee5add4
DH		 1003 int head;
1004
1005 ring_data->ring->q->handle->dev->ops->toggle_ring_irq(ring, 0);
1006
1007 head = readl_relaxed(ring->io_base + RCB_REG_HEAD);
b5996f11 1008
1009 if (head != ring->next_to_clean) {
1010 ring_data->ring->q->handle->dev->ops->toggle_ring_irq(
1011 ring_data->ring, 1);
1012
bccd2711 1013 return false;
1014 } else {
1015 return true;
b5996f11 1016 }
1017}
1018
bccd2711 1019static bool hns_nic_tx_fini_pro_v2(struct hns_nic_ring_data *ring_data)
cee5add4
DH		 1020{
1021 struct hnae_ring *ring = ring_data->ring;
1022 int head = readl_relaxed(ring->io_base + RCB_REG_HEAD);
1023
1024 if (head == ring->next_to_clean)
bccd2711 1025 return true;
cee5add4 1026 else
bccd2711 1027 return false;
cee5add4
DH		 1028}
1029
b5996f11 1030static void hns_nic_tx_clr_all_bufs(struct hns_nic_ring_data *ring_data)
1031{
1032 struct hnae_ring *ring = ring_data->ring;
1033 struct net_device *ndev = ring_data->napi.dev;
1034 struct netdev_queue *dev_queue;
1035 int head;
1036 int bytes, pkts;
1037
74800fc9 1038 NETIF_TX_LOCK(ring);
b5996f11 1039
1040 head = ring->next_to_use; /* ntu :soft setted ring position*/
1041 bytes = 0;
1042 pkts = 0;
1043 while (head != ring->next_to_clean)
1044 hns_nic_reclaim_one_desc(ring, &bytes, &pkts);
1045
74800fc9 1046 NETIF_TX_UNLOCK(ring);
b5996f11 1047
1048 dev_queue = netdev_get_tx_queue(ndev, ring_data->queue_index);
1049 netdev_tx_reset_queue(dev_queue);
1050}
1051
1052static int hns_nic_common_poll(struct napi_struct *napi, int budget)
1053{
bccd2711 1054 int clean_complete = 0;
b5996f11 1055 struct hns_nic_ring_data *ring_data =
1056 container_of(napi, struct hns_nic_ring_data, napi);
bccd2711 1057 struct hnae_ring *ring = ring_data->ring;
b5996f11 1058
bccd2711 1059try_again:
1060 clean_complete += ring_data->poll_one(
1061 ring_data, budget - clean_complete,
1062 ring_data->ex_process);
1063
1064 if (clean_complete < budget) {
1065 if (ring_data->fini_process(ring_data)) {
1066 napi_complete(napi);
1067 ring->q->handle->dev->ops->toggle_ring_irq(ring, 0);
1068 } else {
1069 goto try_again;
1070 }
b5996f11 1071 }
1072
1073 return clean_complete;
1074}
1075
1076static irqreturn_t hns_irq_handle(int irq, void *dev)
1077{
1078 struct hns_nic_ring_data *ring_data = (struct hns_nic_ring_data *)dev;
1079
1080 ring_data->ring->q->handle->dev->ops->toggle_ring_irq(
1081 ring_data->ring, 1);
1082 napi_schedule(&ring_data->napi);
1083
1084 return IRQ_HANDLED;
1085}
1086
1087/**
1088 *hns_nic_adjust_link - adjust net work mode by the phy stat or new param
1089 *@ndev: net device
1090 */
1091static void hns_nic_adjust_link(struct net_device *ndev)
1092{
1093 struct hns_nic_priv *priv = netdev_priv(ndev);
1094 struct hnae_handle *h = priv->ae_handle;
bb7189dc
QX		 1095 int state = 1;
1096
262b38cd 1097 if (ndev->phydev) {
bb7189dc
QX		 1098 h->dev->ops->adjust_link(h, ndev->phydev->speed,
1099 ndev->phydev->duplex);
262b38cd 1100 state = ndev->phydev->link;
bb7189dc
QX		 1101 }
1102 state = state && h->dev->ops->get_status(h);
b5996f11 1103
bb7189dc
QX		 1104 if (state != priv->link) {
1105 if (state) {
1106 netif_carrier_on(ndev);
1107 netif_tx_wake_all_queues(ndev);
1108 netdev_info(ndev, "link up\n");
1109 } else {
1110 netif_carrier_off(ndev);
1111 netdev_info(ndev, "link down\n");
1112 }
1113 priv->link = state;
1114 }
b5996f11 1115}
1116
1117/**
1118 *hns_nic_init_phy - init phy
1119 *@ndev: net device
1120 *@h: ae handle
1121 * Return 0 on success, negative on failure
1122 */
1123int hns_nic_init_phy(struct net_device *ndev, struct hnae_handle *h)
1124{
652d39b0
KY		 1125 struct phy_device *phy_dev = h->phy_dev;
1126 int ret;
b5996f11 1127
652d39b0 1128 if (!h->phy_dev)
b5996f11 1129 return 0;
1130
652d39b0
KY		 1131 if (h->phy_if != PHY_INTERFACE_MODE_XGMII) {
1132 phy_dev->dev_flags = 0;
b5996f11 1133
652d39b0
KY		 1134 ret = phy_connect_direct(ndev, phy_dev, hns_nic_adjust_link,
1135 h->phy_if);
1136 } else {
1137 ret = phy_attach_direct(ndev, phy_dev, 0, h->phy_if);
1138 }
1139 if (unlikely(ret))
1140 return -ENODEV;
b5996f11 1141
1142 phy_dev->supported &= h->if_support;
1143 phy_dev->advertising = phy_dev->supported;
1144
1145 if (h->phy_if == PHY_INTERFACE_MODE_XGMII)
1146 phy_dev->autoneg = false;
1147
b5996f11 1148 return 0;
1149}
1150
1151static int hns_nic_ring_open(struct net_device *netdev, int idx)
1152{
1153 struct hns_nic_priv *priv = netdev_priv(netdev);
1154 struct hnae_handle *h = priv->ae_handle;
1155
1156 napi_enable(&priv->ring_data[idx].napi);
1157
1158 enable_irq(priv->ring_data[idx].ring->irq);
1159 h->dev->ops->toggle_ring_irq(priv->ring_data[idx].ring, 0);
1160
1161 return 0;
1162}
1163
1164static int hns_nic_net_set_mac_address(struct net_device *ndev, void *p)
1165{
1166 struct hns_nic_priv *priv = netdev_priv(ndev);
1167 struct hnae_handle *h = priv->ae_handle;
1168 struct sockaddr *mac_addr = p;
1169 int ret;
1170
1171 if (!mac_addr || !is_valid_ether_addr((const u8 *)mac_addr->sa_data))
1172 return -EADDRNOTAVAIL;
1173
1174 ret = h->dev->ops->set_mac_addr(h, mac_addr->sa_data);
1175 if (ret) {
1176 netdev_err(ndev, "set_mac_address fail, ret=%d!\n", ret);
1177 return ret;
1178 }
1179
1180 memcpy(ndev->dev_addr, mac_addr->sa_data, ndev->addr_len);
1181
1182 return 0;
1183}
1184
1185void hns_nic_update_stats(struct net_device *netdev)
1186{
1187 struct hns_nic_priv *priv = netdev_priv(netdev);
1188 struct hnae_handle *h = priv->ae_handle;
1189
1190 h->dev->ops->update_stats(h, &netdev->stats);
1191}
1192
1193/* set mac addr if it is configed. or leave it to the AE driver */
1194static void hns_init_mac_addr(struct net_device *ndev)
1195{
1196 struct hns_nic_priv *priv = netdev_priv(ndev);
b5996f11 1197
6162928c 1198 if (!device_get_mac_address(priv->dev, ndev->dev_addr, ETH_ALEN)) {
b5996f11 1199 eth_hw_addr_random(ndev);
1200 dev_warn(priv->dev, "No valid mac, use random mac %pM",
1201 ndev->dev_addr);
1202 }
1203}
1204
1205static void hns_nic_ring_close(struct net_device *netdev, int idx)
1206{
1207 struct hns_nic_priv *priv = netdev_priv(netdev);
1208 struct hnae_handle *h = priv->ae_handle;
1209
1210 h->dev->ops->toggle_ring_irq(priv->ring_data[idx].ring, 1);
1211 disable_irq(priv->ring_data[idx].ring->irq);
1212
1213 napi_disable(&priv->ring_data[idx].napi);
1214}
1215
df7adf84 1216static int hns_nic_init_affinity_mask(int q_num, int ring_idx,
1217 struct hnae_ring *ring, cpumask_t *mask)
b5996f11 1218{
b5996f11 1219 int cpu;
727f9c1a 1220
df7adf84 1221 /* Diffrent irq banlance between 16core and 32core.
1222 * The cpu mask set by ring index according to the ring flag
1223 * which indicate the ring is tx or rx.
1224 */
1225 if (q_num == num_possible_cpus()) {
1226 if (is_tx_ring(ring))
1227 cpu = ring_idx;
1228 else
1229 cpu = ring_idx - q_num;
13ac695e 1230 } else {
df7adf84 1231 if (is_tx_ring(ring))
1232 cpu = ring_idx * 2;
1233 else
1234 cpu = (ring_idx - q_num) * 2 + 1;
13ac695e 1235 }
727f9c1a 1236
df7adf84 1237 cpumask_clear(mask);
1238 cpumask_set_cpu(cpu, mask);
1239
1240 return cpu;
13ac695e
S		 1241}
1242
1243static int hns_nic_init_irq(struct hns_nic_priv *priv)
1244{
1245 struct hnae_handle *h = priv->ae_handle;
1246 struct hns_nic_ring_data *rd;
1247 int i;
1248 int ret;
df7adf84 1249 int cpu;
13ac695e 1250
b5996f11 1251 for (i = 0; i < h->q_num * 2; i++) {
1252 rd = &priv->ring_data[i];
1253
1254 if (rd->ring->irq_init_flag == RCB_IRQ_INITED)
1255 break;
1256
1257 snprintf(rd->ring->ring_name, RCB_RING_NAME_LEN,
1258 "%s-%s%d", priv->netdev->name,
df7adf84 1259 (is_tx_ring(rd->ring) ? "tx" : "rx"), rd->queue_index);
b5996f11 1260
1261 rd->ring->ring_name[RCB_RING_NAME_LEN - 1] = '\0';
1262
1263 ret = request_irq(rd->ring->irq,
1264 hns_irq_handle, 0, rd->ring->ring_name, rd);
1265 if (ret) {
1266 netdev_err(priv->netdev, "request irq(%d) fail\n",
1267 rd->ring->irq);
1268 return ret;
1269 }
1270 disable_irq(rd->ring->irq);
df7adf84 1271
1272 cpu = hns_nic_init_affinity_mask(h->q_num, i,
1273 rd->ring, &rd->mask);
1274
1275 if (cpu_online(cpu))
1276 irq_set_affinity_hint(rd->ring->irq,
1277 &rd->mask);
1278
b5996f11 1279 rd->ring->irq_init_flag = RCB_IRQ_INITED;
b5996f11 1280 }
1281
1282 return 0;
1283}
1284
1285static int hns_nic_net_up(struct net_device *ndev)
1286{
1287 struct hns_nic_priv *priv = netdev_priv(ndev);
1288 struct hnae_handle *h = priv->ae_handle;
454784d8 1289 int i, j;
b5996f11 1290 int ret;
1291
1292 ret = hns_nic_init_irq(priv);
1293 if (ret != 0) {
1294 netdev_err(ndev, "hns init irq failed! ret=%d\n", ret);
1295 return ret;
1296 }
1297
1298 for (i = 0; i < h->q_num * 2; i++) {
1299 ret = hns_nic_ring_open(ndev, i);
1300 if (ret)
1301 goto out_has_some_queues;
1302 }
1303
b5996f11 1304 ret = h->dev->ops->set_mac_addr(h, ndev->dev_addr);
1305 if (ret)
1306 goto out_set_mac_addr_err;
1307
1308 ret = h->dev->ops->start ? h->dev->ops->start(h) : 0;
1309 if (ret)
1310 goto out_start_err;
1311
262b38cd
PR		 1312 if (ndev->phydev)
1313 phy_start(ndev->phydev);
b5996f11 1314
1315 clear_bit(NIC_STATE_DOWN, &priv->state);
1316 (void)mod_timer(&priv->service_timer, jiffies + SERVICE_TIMER_HZ);
1317
1318 return 0;
1319
1320out_start_err:
1321 netif_stop_queue(ndev);
1322out_set_mac_addr_err:
b5996f11 1323out_has_some_queues:
1324 for (j = i - 1; j >= 0; j--)
1325 hns_nic_ring_close(ndev, j);
1326
1327 set_bit(NIC_STATE_DOWN, &priv->state);
1328
1329 return ret;
1330}
1331
1332static void hns_nic_net_down(struct net_device *ndev)
1333{
1334 int i;
1335 struct hnae_ae_ops *ops;
1336 struct hns_nic_priv *priv = netdev_priv(ndev);
1337
1338 if (test_and_set_bit(NIC_STATE_DOWN, &priv->state))
1339 return;
1340
1341 (void)del_timer_sync(&priv->service_timer);
1342 netif_tx_stop_all_queues(ndev);
1343 netif_carrier_off(ndev);
1344 netif_tx_disable(ndev);
1345 priv->link = 0;
1346
262b38cd
PR		 1347 if (ndev->phydev)
1348 phy_stop(ndev->phydev);
b5996f11 1349
1350 ops = priv->ae_handle->dev->ops;
1351
1352 if (ops->stop)
1353 ops->stop(priv->ae_handle);
1354
1355 netif_tx_stop_all_queues(ndev);
1356
1357 for (i = priv->ae_handle->q_num - 1; i >= 0; i--) {
1358 hns_nic_ring_close(ndev, i);
1359 hns_nic_ring_close(ndev, i + priv->ae_handle->q_num);
1360
1361 /* clean tx buffers*/
1362 hns_nic_tx_clr_all_bufs(priv->ring_data + i);
1363 }
1364}
1365
1366void hns_nic_net_reset(struct net_device *ndev)
1367{
1368 struct hns_nic_priv *priv = netdev_priv(ndev);
1369 struct hnae_handle *handle = priv->ae_handle;
1370
1371 while (test_and_set_bit(NIC_STATE_RESETTING, &priv->state))
1372 usleep_range(1000, 2000);
1373
1374 (void)hnae_reinit_handle(handle);
1375
1376 clear_bit(NIC_STATE_RESETTING, &priv->state);
1377}
1378
1379void hns_nic_net_reinit(struct net_device *netdev)
1380{
1381 struct hns_nic_priv *priv = netdev_priv(netdev);
bb5eeb16 1382 enum hnae_port_type type = priv->ae_handle->port_type;
b5996f11 1383
860e9538 1384 netif_trans_update(priv->netdev);
b5996f11 1385 while (test_and_set_bit(NIC_STATE_REINITING, &priv->state))
1386 usleep_range(1000, 2000);
1387
1388 hns_nic_net_down(netdev);
bb5eeb16
LYS		 1389
1390 /* Only do hns_nic_net_reset in debug mode
1391 * because of hardware limitation.
1392 */
1393 if (type == HNAE_PORT_DEBUG)
1394 hns_nic_net_reset(netdev);
1395
b5996f11 1396 (void)hns_nic_net_up(netdev);
1397 clear_bit(NIC_STATE_REINITING, &priv->state);
1398}
1399
1400static int hns_nic_net_open(struct net_device *ndev)
1401{
1402 struct hns_nic_priv *priv = netdev_priv(ndev);
1403 struct hnae_handle *h = priv->ae_handle;
1404 int ret;
1405
1406 if (test_bit(NIC_STATE_TESTING, &priv->state))
1407 return -EBUSY;
1408
1409 priv->link = 0;
1410 netif_carrier_off(ndev);
1411
1412 ret = netif_set_real_num_tx_queues(ndev, h->q_num);
1413 if (ret < 0) {
1414 netdev_err(ndev, "netif_set_real_num_tx_queues fail, ret=%d!\n",
1415 ret);
1416 return ret;
1417 }
1418
1419 ret = netif_set_real_num_rx_queues(ndev, h->q_num);
1420 if (ret < 0) {
1421 netdev_err(ndev,
1422 "netif_set_real_num_rx_queues fail, ret=%d!\n", ret);
1423 return ret;
1424 }
1425
1426 ret = hns_nic_net_up(ndev);
1427 if (ret) {
1428 netdev_err(ndev,
1429 "hns net up fail, ret=%d!\n", ret);
1430 return ret;
1431 }
1432
1433 return 0;
1434}
1435
1436static int hns_nic_net_stop(struct net_device *ndev)
1437{
1438 hns_nic_net_down(ndev);
1439
1440 return 0;
1441}
1442
1443static void hns_tx_timeout_reset(struct hns_nic_priv *priv);
1444static void hns_nic_net_timeout(struct net_device *ndev)
1445{
1446 struct hns_nic_priv *priv = netdev_priv(ndev);
1447
1448 hns_tx_timeout_reset(priv);
1449}
1450
1451static int hns_nic_do_ioctl(struct net_device *netdev, struct ifreq *ifr,
1452 int cmd)
1453{
262b38cd 1454 struct phy_device *phy_dev = netdev->phydev;
b5996f11 1455
1456 if (!netif_running(netdev))
1457 return -EINVAL;
1458
1459 if (!phy_dev)
1460 return -ENOTSUPP;
1461
1462 return phy_mii_ioctl(phy_dev, ifr, cmd);
1463}
1464
1465/* use only for netconsole to poll with the device without interrupt */
1466#ifdef CONFIG_NET_POLL_CONTROLLER
1467void hns_nic_poll_controller(struct net_device *ndev)
1468{
1469 struct hns_nic_priv *priv = netdev_priv(ndev);
1470 unsigned long flags;
1471 int i;
1472
1473 local_irq_save(flags);
1474 for (i = 0; i < priv->ae_handle->q_num * 2; i++)
1475 napi_schedule(&priv->ring_data[i].napi);
1476 local_irq_restore(flags);
1477}
1478#endif
1479
1480static netdev_tx_t hns_nic_net_xmit(struct sk_buff *skb,
1481 struct net_device *ndev)
1482{
1483 struct hns_nic_priv *priv = netdev_priv(ndev);
b5996f11 1484
1485 assert(skb->queue_mapping < ndev->ae_handle->q_num);
25b1d520
YL		 1486
1487 return hns_nic_net_xmit_hw(ndev, skb,
1488 &tx_ring_data(priv, skb->queue_mapping));
b5996f11 1489}
1490
8cefd2ad 1491static void hns_nic_drop_rx_fetch(struct hns_nic_ring_data *ring_data,
1492 struct sk_buff *skb)
1493{
1494 dev_kfree_skb_any(skb);
1495}
1496
1497#define HNS_LB_TX_RING 0
1498static struct sk_buff *hns_assemble_skb(struct net_device *ndev)
1499{
1500 struct sk_buff *skb;
1501 struct ethhdr *ethhdr;
1502 int frame_len;
1503
1504 /* allocate test skb */
1505 skb = alloc_skb(64, GFP_KERNEL);
1506 if (!skb)
1507 return NULL;
1508
1509 skb_put(skb, 64);
1510 skb->dev = ndev;
1511 memset(skb->data, 0xFF, skb->len);
1512
1513 /* must be tcp/ip package */
1514 ethhdr = (struct ethhdr *)skb->data;
1515 ethhdr->h_proto = htons(ETH_P_IP);
1516
1517 frame_len = skb->len & (~1ul);
1518 memset(&skb->data[frame_len / 2], 0xAA,
1519 frame_len / 2 - 1);
1520
1521 skb->queue_mapping = HNS_LB_TX_RING;
1522
1523 return skb;
1524}
1525
1526static int hns_enable_serdes_lb(struct net_device *ndev)
1527{
1528 struct hns_nic_priv *priv = netdev_priv(ndev);
1529 struct hnae_handle *h = priv->ae_handle;
1530 struct hnae_ae_ops *ops = h->dev->ops;
1531 int speed, duplex;
1532 int ret;
1533
1534 ret = ops->set_loopback(h, MAC_INTERNALLOOP_SERDES, 1);
1535 if (ret)
1536 return ret;
1537
1538 ret = ops->start ? ops->start(h) : 0;
1539 if (ret)
1540 return ret;
1541
1542 /* link adjust duplex*/
1543 if (h->phy_if != PHY_INTERFACE_MODE_XGMII)
1544 speed = 1000;
1545 else
1546 speed = 10000;
1547 duplex = 1;
1548
1549 ops->adjust_link(h, speed, duplex);
1550
1551 /* wait h/w ready */
1552 mdelay(300);
1553
1554 return 0;
1555}
1556
1557static void hns_disable_serdes_lb(struct net_device *ndev)
1558{
1559 struct hns_nic_priv *priv = netdev_priv(ndev);
1560 struct hnae_handle *h = priv->ae_handle;
1561 struct hnae_ae_ops *ops = h->dev->ops;
1562
1563 ops->stop(h);
1564 ops->set_loopback(h, MAC_INTERNALLOOP_SERDES, 0);
1565}
1566
1567/**
1568 *hns_nic_clear_all_rx_fetch - clear the chip fetched descriptions. The
1569 *function as follows:
1570 * 1. if one rx ring has found the page_offset is not equal 0 between head
1571 * and tail, it means that the chip fetched the wrong descs for the ring
1572 * which buffer size is 4096.
1573 * 2. we set the chip serdes loopback and set rss indirection to the ring.
1574 * 3. construct 64-bytes ip broadcast packages, wait the associated rx ring
1575 * recieving all packages and it will fetch new descriptions.
1576 * 4. recover to the original state.
1577 *
1578 *@ndev: net device
1579 */
1580static int hns_nic_clear_all_rx_fetch(struct net_device *ndev)
1581{
1582 struct hns_nic_priv *priv = netdev_priv(ndev);
1583 struct hnae_handle *h = priv->ae_handle;
1584 struct hnae_ae_ops *ops = h->dev->ops;
1585 struct hns_nic_ring_data *rd;
1586 struct hnae_ring *ring;
1587 struct sk_buff *skb;
1588 u32 *org_indir;
1589 u32 *cur_indir;
1590 int indir_size;
1591 int head, tail;
1592 int fetch_num;
1593 int i, j;
1594 bool found;
1595 int retry_times;
1596 int ret = 0;
1597
1598 /* alloc indir memory */
1599 indir_size = ops->get_rss_indir_size(h) * sizeof(*org_indir);
1600 org_indir = kzalloc(indir_size, GFP_KERNEL);
1601 if (!org_indir)
1602 return -ENOMEM;
1603
1604 /* store the orginal indirection */
1605 ops->get_rss(h, org_indir, NULL, NULL);
1606
1607 cur_indir = kzalloc(indir_size, GFP_KERNEL);
1608 if (!cur_indir) {
1609 ret = -ENOMEM;
1610 goto cur_indir_alloc_err;
1611 }
1612
1613 /* set loopback */
1614 if (hns_enable_serdes_lb(ndev)) {
1615 ret = -EINVAL;
1616 goto enable_serdes_lb_err;
1617 }
1618
1619 /* foreach every rx ring to clear fetch desc */
1620 for (i = 0; i < h->q_num; i++) {
1621 ring = &h->qs[i]->rx_ring;
1622 head = readl_relaxed(ring->io_base + RCB_REG_HEAD);
1623 tail = readl_relaxed(ring->io_base + RCB_REG_TAIL);
1624 found = false;
1625 fetch_num = ring_dist(ring, head, tail);
1626
1627 while (head != tail) {
1628 if (ring->desc_cb[head].page_offset != 0) {
1629 found = true;
1630 break;
1631 }
1632
1633 head++;
1634 if (head == ring->desc_num)
1635 head = 0;
1636 }
1637
1638 if (found) {
1639 for (j = 0; j < indir_size / sizeof(*org_indir); j++)
1640 cur_indir[j] = i;
1641 ops->set_rss(h, cur_indir, NULL, 0);
1642
1643 for (j = 0; j < fetch_num; j++) {
1644 /* alloc one skb and init */
1645 skb = hns_assemble_skb(ndev);
1646 if (!skb)
1647 goto out;
1648 rd = &tx_ring_data(priv, skb->queue_mapping);
1649 hns_nic_net_xmit_hw(ndev, skb, rd);
1650
1651 retry_times = 0;
1652 while (retry_times++ < 10) {
1653 mdelay(10);
1654 /* clean rx */
1655 rd = &rx_ring_data(priv, i);
1656 if (rd->poll_one(rd, fetch_num,
1657 hns_nic_drop_rx_fetch))
1658 break;
1659 }
1660
1661 retry_times = 0;
1662 while (retry_times++ < 10) {
1663 mdelay(10);
1664 /* clean tx ring 0 send package */
1665 rd = &tx_ring_data(priv,
1666 HNS_LB_TX_RING);
1667 if (rd->poll_one(rd, fetch_num, NULL))
1668 break;
1669 }
1670 }
1671 }
1672 }
1673
1674out:
1675 /* restore everything */
1676 ops->set_rss(h, org_indir, NULL, 0);
1677 hns_disable_serdes_lb(ndev);
1678enable_serdes_lb_err:
1679 kfree(cur_indir);
1680cur_indir_alloc_err:
1681 kfree(org_indir);
1682
1683 return ret;
1684}
1685
b5996f11 1686static int hns_nic_change_mtu(struct net_device *ndev, int new_mtu)
1687{
1688 struct hns_nic_priv *priv = netdev_priv(ndev);
1689 struct hnae_handle *h = priv->ae_handle;
8cefd2ad 1690 bool if_running = netif_running(ndev);
b5996f11 1691 int ret;
1692
8cefd2ad 1693 /* MTU < 68 is an error and causes problems on some kernels */
1694 if (new_mtu < 68)
1695 return -EINVAL;
1696
1697 /* MTU no change */
1698 if (new_mtu == ndev->mtu)
1699 return 0;
1700
b5996f11 1701 if (!h->dev->ops->set_mtu)
1702 return -ENOTSUPP;
1703
8cefd2ad 1704 if (if_running) {
b5996f11 1705 (void)hns_nic_net_stop(ndev);
1706 msleep(100);
8cefd2ad 1707 }
b5996f11 1708
8cefd2ad 1709 if (priv->enet_ver != AE_VERSION_1 &&
1710 ndev->mtu <= BD_SIZE_2048_MAX_MTU &&
1711 new_mtu > BD_SIZE_2048_MAX_MTU) {
1712 /* update desc */
1713 hnae_reinit_all_ring_desc(h);
b5996f11 1714
8cefd2ad 1715 /* clear the package which the chip has fetched */
1716 ret = hns_nic_clear_all_rx_fetch(ndev);
1717
1718 /* the page offset must be consist with desc */
1719 hnae_reinit_all_ring_page_off(h);
1720
1721 if (ret) {
1722 netdev_err(ndev, "clear the fetched desc fail\n");
1723 goto out;
1724 }
1725 }
1726
1727 ret = h->dev->ops->set_mtu(h, new_mtu);
1728 if (ret) {
1729 netdev_err(ndev, "set mtu fail, return value %d\n",
1730 ret);
1731 goto out;
b5996f11 1732 }
1733
8cefd2ad 1734 /* finally, set new mtu to netdevice */
1735 ndev->mtu = new_mtu;
1736
1737out:
1738 if (if_running) {
1739 if (hns_nic_net_open(ndev)) {
1740 netdev_err(ndev, "hns net open fail\n");
1741 ret = -EINVAL;
1742 }
1743 }
b5996f11 1744
1745 return ret;
1746}
1747
38f616da
S		 1748static int hns_nic_set_features(struct net_device *netdev,
1749 netdev_features_t features)
1750{
1751 struct hns_nic_priv *priv = netdev_priv(netdev);
38f616da
S		 1752
1753 switch (priv->enet_ver) {
1754 case AE_VERSION_1:
1755 if (features & (NETIF_F_TSO | NETIF_F_TSO6))
1756 netdev_info(netdev, "enet v1 do not support tso!\n");
1757 break;
1758 default:
1759 if (features & (NETIF_F_TSO | NETIF_F_TSO6)) {
1760 priv->ops.fill_desc = fill_tso_desc;
1761 priv->ops.maybe_stop_tx = hns_nic_maybe_stop_tso;
1762 /* The chip only support 7*4096 */
1763 netif_set_gso_max_size(netdev, 7 * 4096);
38f616da
S		 1764 } else {
1765 priv->ops.fill_desc = fill_v2_desc;
1766 priv->ops.maybe_stop_tx = hns_nic_maybe_stop_tx;
38f616da
S		 1767 }
1768 break;
1769 }
1770 netdev->features = features;
1771 return 0;
1772}
1773
1774static netdev_features_t hns_nic_fix_features(
1775 struct net_device *netdev, netdev_features_t features)
1776{
1777 struct hns_nic_priv *priv = netdev_priv(netdev);
1778
1779 switch (priv->enet_ver) {
1780 case AE_VERSION_1:
1781 features &= ~(NETIF_F_TSO | NETIF_F_TSO6 |
1782 NETIF_F_HW_VLAN_CTAG_FILTER);
1783 break;
1784 default:
1785 break;
1786 }
1787 return features;
1788}
1789
66355f52
KY		 1790static int hns_nic_uc_sync(struct net_device *netdev, const unsigned char *addr)
1791{
1792 struct hns_nic_priv *priv = netdev_priv(netdev);
1793 struct hnae_handle *h = priv->ae_handle;
1794
1795 if (h->dev->ops->add_uc_addr)
1796 return h->dev->ops->add_uc_addr(h, addr);
1797
1798 return 0;
1799}
1800
1801static int hns_nic_uc_unsync(struct net_device *netdev,
1802 const unsigned char *addr)
1803{
1804 struct hns_nic_priv *priv = netdev_priv(netdev);
1805 struct hnae_handle *h = priv->ae_handle;
1806
1807 if (h->dev->ops->rm_uc_addr)
1808 return h->dev->ops->rm_uc_addr(h, addr);
1809
1810 return 0;
1811}
1812
b5996f11 1813/**
1814 * nic_set_multicast_list - set mutl mac address
1815 * @netdev: net device
1816 * @p: mac address
1817 *
1818 * return void
1819 */
1820void hns_set_multicast_list(struct net_device *ndev)
1821{
1822 struct hns_nic_priv *priv = netdev_priv(ndev);
1823 struct hnae_handle *h = priv->ae_handle;
1824 struct netdev_hw_addr *ha = NULL;
1825
1826 if (!h) {
1827 netdev_err(ndev, "hnae handle is null\n");
1828 return;
1829 }
1830
ec2cafe6
KY		 1831 if (h->dev->ops->clr_mc_addr)
1832 if (h->dev->ops->clr_mc_addr(h))
1833 netdev_err(ndev, "clear multicast address fail\n");
1834
b5996f11 1835 if (h->dev->ops->set_mc_addr) {
1836 netdev_for_each_mc_addr(ha, ndev)
1837 if (h->dev->ops->set_mc_addr(h, ha->addr))
1838 netdev_err(ndev, "set multicast fail\n");
1839 }
1840}
1841
4568637f 1842void hns_nic_set_rx_mode(struct net_device *ndev)
1843{
1844 struct hns_nic_priv *priv = netdev_priv(ndev);
1845 struct hnae_handle *h = priv->ae_handle;
1846
1847 if (h->dev->ops->set_promisc_mode) {
1848 if (ndev->flags & IFF_PROMISC)
1849 h->dev->ops->set_promisc_mode(h, 1);
1850 else
1851 h->dev->ops->set_promisc_mode(h, 0);
1852 }
1853
1854 hns_set_multicast_list(ndev);
66355f52
KY		 1855
1856 if (__dev_uc_sync(ndev, hns_nic_uc_sync, hns_nic_uc_unsync))
1857 netdev_err(ndev, "sync uc address fail\n");
4568637f 1858}
1859
b5996f11 1860struct rtnl_link_stats64 *hns_nic_get_stats64(struct net_device *ndev,
1861 struct rtnl_link_stats64 *stats)
1862{
1863 int idx = 0;
1864 u64 tx_bytes = 0;
1865 u64 rx_bytes = 0;
1866 u64 tx_pkts = 0;
1867 u64 rx_pkts = 0;
1868 struct hns_nic_priv *priv = netdev_priv(ndev);
1869 struct hnae_handle *h = priv->ae_handle;
1870
1871 for (idx = 0; idx < h->q_num; idx++) {
1872 tx_bytes += h->qs[idx]->tx_ring.stats.tx_bytes;
1873 tx_pkts += h->qs[idx]->tx_ring.stats.tx_pkts;
1874 rx_bytes += h->qs[idx]->rx_ring.stats.rx_bytes;
1875 rx_pkts += h->qs[idx]->rx_ring.stats.rx_pkts;
1876 }
1877
1878 stats->tx_bytes = tx_bytes;
1879 stats->tx_packets = tx_pkts;
1880 stats->rx_bytes = rx_bytes;
1881 stats->rx_packets = rx_pkts;
1882
1883 stats->rx_errors = ndev->stats.rx_errors;
1884 stats->multicast = ndev->stats.multicast;
1885 stats->rx_length_errors = ndev->stats.rx_length_errors;
1886 stats->rx_crc_errors = ndev->stats.rx_crc_errors;
1887 stats->rx_missed_errors = ndev->stats.rx_missed_errors;
1888
1889 stats->tx_errors = ndev->stats.tx_errors;
1890 stats->rx_dropped = ndev->stats.rx_dropped;
1891 stats->tx_dropped = ndev->stats.tx_dropped;
1892 stats->collisions = ndev->stats.collisions;
1893 stats->rx_over_errors = ndev->stats.rx_over_errors;
1894 stats->rx_frame_errors = ndev->stats.rx_frame_errors;
1895 stats->rx_fifo_errors = ndev->stats.rx_fifo_errors;
1896 stats->tx_aborted_errors = ndev->stats.tx_aborted_errors;
1897 stats->tx_carrier_errors = ndev->stats.tx_carrier_errors;
1898 stats->tx_fifo_errors = ndev->stats.tx_fifo_errors;
1899 stats->tx_heartbeat_errors = ndev->stats.tx_heartbeat_errors;
1900 stats->tx_window_errors = ndev->stats.tx_window_errors;
1901 stats->rx_compressed = ndev->stats.rx_compressed;
1902 stats->tx_compressed = ndev->stats.tx_compressed;
1903
1904 return stats;
1905}
1906
2162a4a1
DH		 1907static u16
1908hns_nic_select_queue(struct net_device *ndev, struct sk_buff *skb,
1909 void *accel_priv, select_queue_fallback_t fallback)
1910{
1911 struct ethhdr *eth_hdr = (struct ethhdr *)skb->data;
1912 struct hns_nic_priv *priv = netdev_priv(ndev);
1913
1914 /* fix hardware broadcast/multicast packets queue loopback */
1915 if (!AE_IS_VER1(priv->enet_ver) &&
1916 is_multicast_ether_addr(eth_hdr->h_dest))
1917 return 0;
1918 else
1919 return fallback(ndev, skb);
1920}
1921
b5996f11 1922static const struct net_device_ops hns_nic_netdev_ops = {
1923 .ndo_open = hns_nic_net_open,
1924 .ndo_stop = hns_nic_net_stop,
1925 .ndo_start_xmit = hns_nic_net_xmit,
1926 .ndo_tx_timeout = hns_nic_net_timeout,
1927 .ndo_set_mac_address = hns_nic_net_set_mac_address,
1928 .ndo_change_mtu = hns_nic_change_mtu,
1929 .ndo_do_ioctl = hns_nic_do_ioctl,
38f616da
S		 1930 .ndo_set_features = hns_nic_set_features,
1931 .ndo_fix_features = hns_nic_fix_features,
b5996f11 1932 .ndo_get_stats64 = hns_nic_get_stats64,
1933#ifdef CONFIG_NET_POLL_CONTROLLER
1934 .ndo_poll_controller = hns_nic_poll_controller,
1935#endif
4568637f 1936 .ndo_set_rx_mode = hns_nic_set_rx_mode,
2162a4a1 1937 .ndo_select_queue = hns_nic_select_queue,
b5996f11 1938};
1939
1940static void hns_nic_update_link_status(struct net_device *netdev)
1941{
1942 struct hns_nic_priv *priv = netdev_priv(netdev);
1943
1944 struct hnae_handle *h = priv->ae_handle;
b5996f11 1945
bb7189dc
QX		 1946 if (h->phy_dev) {
1947 if (h->phy_if != PHY_INTERFACE_MODE_XGMII)
1948 return;
b5996f11 1949
bb7189dc 1950 (void)genphy_read_status(h->phy_dev);
b5996f11 1951 }
bb7189dc 1952 hns_nic_adjust_link(netdev);
b5996f11 1953}
1954
1955/* for dumping key regs*/
1956static void hns_nic_dump(struct hns_nic_priv *priv)
1957{
1958 struct hnae_handle *h = priv->ae_handle;
1959 struct hnae_ae_ops *ops = h->dev->ops;
1960 u32 *data, reg_num, i;
1961
1962 if (ops->get_regs_len && ops->get_regs) {
1963 reg_num = ops->get_regs_len(priv->ae_handle);
1964 reg_num = (reg_num + 3ul) & ~3ul;
1965 data = kcalloc(reg_num, sizeof(u32), GFP_KERNEL);
1966 if (data) {
1967 ops->get_regs(priv->ae_handle, data);
1968 for (i = 0; i < reg_num; i += 4)
1969 pr_info("0x%08x: 0x%08x 0x%08x 0x%08x 0x%08x\n",
1970 i, data[i], data[i + 1],
1971 data[i + 2], data[i + 3]);
1972 kfree(data);
1973 }
1974 }
1975
1976 for (i = 0; i < h->q_num; i++) {
1977 pr_info("tx_queue%d_next_to_clean:%d\n",
1978 i, h->qs[i]->tx_ring.next_to_clean);
1979 pr_info("tx_queue%d_next_to_use:%d\n",
1980 i, h->qs[i]->tx_ring.next_to_use);
1981 pr_info("rx_queue%d_next_to_clean:%d\n",
1982 i, h->qs[i]->rx_ring.next_to_clean);
1983 pr_info("rx_queue%d_next_to_use:%d\n",
1984 i, h->qs[i]->rx_ring.next_to_use);
1985 }
1986}
1987
f7211729 1988/* for resetting subtask */
b5996f11 1989static void hns_nic_reset_subtask(struct hns_nic_priv *priv)
1990{
1991 enum hnae_port_type type = priv->ae_handle->port_type;
1992
1993 if (!test_bit(NIC_STATE2_RESET_REQUESTED, &priv->state))
1994 return;
1995 clear_bit(NIC_STATE2_RESET_REQUESTED, &priv->state);
1996
1997 /* If we're already down, removing or resetting, just bail */
1998 if (test_bit(NIC_STATE_DOWN, &priv->state) ||
1999 test_bit(NIC_STATE_REMOVING, &priv->state) ||
2000 test_bit(NIC_STATE_RESETTING, &priv->state))
2001 return;
2002
2003 hns_nic_dump(priv);
13ac695e
S		 2004 netdev_info(priv->netdev, "try to reset %s port!\n",
2005 (type == HNAE_PORT_DEBUG ? "debug" : "service"));
b5996f11 2006
2007 rtnl_lock();
90a505b9 2008 /* put off any impending NetWatchDogTimeout */
860e9538 2009 netif_trans_update(priv->netdev);
bb5eeb16 2010 hns_nic_net_reinit(priv->netdev);
90a505b9 2011
b5996f11 2012 rtnl_unlock();
2013}
2014
2015/* for doing service complete*/
2016static void hns_nic_service_event_complete(struct hns_nic_priv *priv)
2017{
13ac695e 2018 WARN_ON(!test_bit(NIC_STATE_SERVICE_SCHED, &priv->state));
a82e6438 2019 /* make sure to commit the things */
b5996f11 2020 smp_mb__before_atomic();
2021 clear_bit(NIC_STATE_SERVICE_SCHED, &priv->state);
2022}
2023
2024static void hns_nic_service_task(struct work_struct *work)
2025{
2026 struct hns_nic_priv *priv
2027 = container_of(work, struct hns_nic_priv, service_task);
2028 struct hnae_handle *h = priv->ae_handle;
2029
2030 hns_nic_update_link_status(priv->netdev);
2031 h->dev->ops->update_led_status(h);
2032 hns_nic_update_stats(priv->netdev);
2033
2034 hns_nic_reset_subtask(priv);
2035 hns_nic_service_event_complete(priv);
2036}
2037
2038static void hns_nic_task_schedule(struct hns_nic_priv *priv)
2039{
2040 if (!test_bit(NIC_STATE_DOWN, &priv->state) &&
2041 !test_bit(NIC_STATE_REMOVING, &priv->state) &&
2042 !test_and_set_bit(NIC_STATE_SERVICE_SCHED, &priv->state))
2043 (void)schedule_work(&priv->service_task);
2044}
2045
2046static void hns_nic_service_timer(unsigned long data)
2047{
2048 struct hns_nic_priv *priv = (struct hns_nic_priv *)data;
2049
2050 (void)mod_timer(&priv->service_timer, jiffies + SERVICE_TIMER_HZ);
2051
2052 hns_nic_task_schedule(priv);
2053}
2054
2055/**
2056 * hns_tx_timeout_reset - initiate reset due to Tx timeout
2057 * @priv: driver private struct
2058 **/
2059static void hns_tx_timeout_reset(struct hns_nic_priv *priv)
2060{
2061 /* Do the reset outside of interrupt context */
2062 if (!test_bit(NIC_STATE_DOWN, &priv->state)) {
2063 set_bit(NIC_STATE2_RESET_REQUESTED, &priv->state);
2064 netdev_warn(priv->netdev,
2065 "initiating reset due to tx timeout(%llu,0x%lx)\n",
2066 priv->tx_timeout_count, priv->state);
2067 priv->tx_timeout_count++;
2068 hns_nic_task_schedule(priv);
2069 }
2070}
2071
2072static int hns_nic_init_ring_data(struct hns_nic_priv *priv)
2073{
2074 struct hnae_handle *h = priv->ae_handle;
2075 struct hns_nic_ring_data *rd;
4b34aa41 2076 bool is_ver1 = AE_IS_VER1(priv->enet_ver);
b5996f11 2077 int i;
2078
2079 if (h->q_num > NIC_MAX_Q_PER_VF) {
2080 netdev_err(priv->netdev, "too much queue (%d)\n", h->q_num);
2081 return -EINVAL;
2082 }
2083
2084 priv->ring_data = kzalloc(h->q_num * sizeof(*priv->ring_data) * 2,
2085 GFP_KERNEL);
2086 if (!priv->ring_data)
2087 return -ENOMEM;
2088
2089 for (i = 0; i < h->q_num; i++) {
2090 rd = &priv->ring_data[i];
2091 rd->queue_index = i;
2092 rd->ring = &h->qs[i]->tx_ring;
2093 rd->poll_one = hns_nic_tx_poll_one;
cee5add4
DH		 2094 rd->fini_process = is_ver1 ? hns_nic_tx_fini_pro :
2095 hns_nic_tx_fini_pro_v2;
b5996f11 2096
2097 netif_napi_add(priv->netdev, &rd->napi,
2098 hns_nic_common_poll, NIC_TX_CLEAN_MAX_NUM);
2099 rd->ring->irq_init_flag = RCB_IRQ_NOT_INITED;
2100 }
2101 for (i = h->q_num; i < h->q_num * 2; i++) {
2102 rd = &priv->ring_data[i];
2103 rd->queue_index = i - h->q_num;
2104 rd->ring = &h->qs[i - h->q_num]->rx_ring;
2105 rd->poll_one = hns_nic_rx_poll_one;
2106 rd->ex_process = hns_nic_rx_up_pro;
cee5add4
DH		 2107 rd->fini_process = is_ver1 ? hns_nic_rx_fini_pro :
2108 hns_nic_rx_fini_pro_v2;
b5996f11 2109
2110 netif_napi_add(priv->netdev, &rd->napi,
2111 hns_nic_common_poll, NIC_RX_CLEAN_MAX_NUM);
2112 rd->ring->irq_init_flag = RCB_IRQ_NOT_INITED;
2113 }
2114
2115 return 0;
2116}
2117
2118static void hns_nic_uninit_ring_data(struct hns_nic_priv *priv)
2119{
2120 struct hnae_handle *h = priv->ae_handle;
2121 int i;
2122
2123 for (i = 0; i < h->q_num * 2; i++) {
2124 netif_napi_del(&priv->ring_data[i].napi);
2125 if (priv->ring_data[i].ring->irq_init_flag == RCB_IRQ_INITED) {
13ac695e
S		 2126 (void)irq_set_affinity_hint(
2127 priv->ring_data[i].ring->irq,
2128 NULL);
b5996f11 2129 free_irq(priv->ring_data[i].ring->irq,
2130 &priv->ring_data[i]);
2131 }
2132
2133 priv->ring_data[i].ring->irq_init_flag = RCB_IRQ_NOT_INITED;
2134 }
2135 kfree(priv->ring_data);
2136}
2137
13ac695e
S		 2138static void hns_nic_set_priv_ops(struct net_device *netdev)
2139{
2140 struct hns_nic_priv *priv = netdev_priv(netdev);
64353af6 2141 struct hnae_handle *h = priv->ae_handle;
13ac695e
S		 2142
2143 if (AE_IS_VER1(priv->enet_ver)) {
2144 priv->ops.fill_desc = fill_desc;
2145 priv->ops.get_rxd_bnum = get_rx_desc_bnum;
2146 priv->ops.maybe_stop_tx = hns_nic_maybe_stop_tx;
2147 } else {
2148 priv->ops.get_rxd_bnum = get_v2rx_desc_bnum;
64353af6
S		 2149 if ((netdev->features & NETIF_F_TSO) ||
2150 (netdev->features & NETIF_F_TSO6)) {
2151 priv->ops.fill_desc = fill_tso_desc;
2152 priv->ops.maybe_stop_tx = hns_nic_maybe_stop_tso;
2153 /* This chip only support 7*4096 */
2154 netif_set_gso_max_size(netdev, 7 * 4096);
64353af6
S		 2155 } else {
2156 priv->ops.fill_desc = fill_v2_desc;
2157 priv->ops.maybe_stop_tx = hns_nic_maybe_stop_tx;
2158 }
6fe27464
DH		 2159 /* enable tso when init
2160 * control tso on/off through TSE bit in bd
2161 */
2162 h->dev->ops->set_tso_stats(h, 1);
13ac695e
S		 2163 }
2164}
2165
b5996f11 2166static int hns_nic_try_get_ae(struct net_device *ndev)
2167{
2168 struct hns_nic_priv *priv = netdev_priv(ndev);
2169 struct hnae_handle *h;
2170 int ret;
2171
2172 h = hnae_get_handle(&priv->netdev->dev,
7b2acae6 2173 priv->fwnode, priv->port_id, NULL);
b5996f11 2174 if (IS_ERR_OR_NULL(h)) {
daa8cfd9 2175 ret = -ENODEV;
b5996f11 2176 dev_dbg(priv->dev, "has not handle, register notifier!\n");
2177 goto out;
2178 }
2179 priv->ae_handle = h;
2180
2181 ret = hns_nic_init_phy(ndev, h);
2182 if (ret) {
2183 dev_err(priv->dev, "probe phy device fail!\n");
2184 goto out_init_phy;
2185 }
2186
2187 ret = hns_nic_init_ring_data(priv);
2188 if (ret) {
2189 ret = -ENOMEM;
2190 goto out_init_ring_data;
2191 }
2192
13ac695e
S		 2193 hns_nic_set_priv_ops(ndev);
2194
b5996f11 2195 ret = register_netdev(ndev);
2196 if (ret) {
2197 dev_err(priv->dev, "probe register netdev fail!\n");
2198 goto out_reg_ndev_fail;
2199 }
2200 return 0;
2201
2202out_reg_ndev_fail:
2203 hns_nic_uninit_ring_data(priv);
2204 priv->ring_data = NULL;
2205out_init_phy:
2206out_init_ring_data:
2207 hnae_put_handle(priv->ae_handle);
2208 priv->ae_handle = NULL;
2209out:
2210 return ret;
2211}
2212
2213static int hns_nic_notifier_action(struct notifier_block *nb,
2214 unsigned long action, void *data)
2215{
2216 struct hns_nic_priv *priv =
2217 container_of(nb, struct hns_nic_priv, notifier_block);
2218
2219 assert(action == HNAE_AE_REGISTER);
2220
2221 if (!hns_nic_try_get_ae(priv->netdev)) {
2222 hnae_unregister_notifier(&priv->notifier_block);
2223 priv->notifier_block.notifier_call = NULL;
2224 }
2225 return 0;
2226}
2227
2228static int hns_nic_dev_probe(struct platform_device *pdev)
2229{
2230 struct device *dev = &pdev->dev;
2231 struct net_device *ndev;
2232 struct hns_nic_priv *priv;
406adee9 2233 u32 port_id;
b5996f11 2234 int ret;
2235
2236 ndev = alloc_etherdev_mq(sizeof(struct hns_nic_priv), NIC_MAX_Q_PER_VF);
2237 if (!ndev)
2238 return -ENOMEM;
2239
2240 platform_set_drvdata(pdev, ndev);
2241
2242 priv = netdev_priv(ndev);
2243 priv->dev = dev;
2244 priv->netdev = ndev;
2245
63434888
KY		 2246 if (dev_of_node(dev)) {
2247 struct device_node *ae_node;
b5996f11 2248
63434888
KY		 2249 if (of_device_is_compatible(dev->of_node,
2250 "hisilicon,hns-nic-v1"))
2251 priv->enet_ver = AE_VERSION_1;
2252 else
2253 priv->enet_ver = AE_VERSION_2;
2254
2255 ae_node = of_parse_phandle(dev->of_node, "ae-handle", 0);
2256 if (IS_ERR_OR_NULL(ae_node)) {
2257 ret = PTR_ERR(ae_node);
2258 dev_err(dev, "not find ae-handle\n");
2259 goto out_read_prop_fail;
2260 }
2261 priv->fwnode = &ae_node->fwnode;
2262 } else if (is_acpi_node(dev->fwnode)) {
2263 struct acpi_reference_args args;
2264
2265 if (acpi_dev_found(hns_enet_acpi_match[0].id))
2266 priv->enet_ver = AE_VERSION_1;
2267 else if (acpi_dev_found(hns_enet_acpi_match[1].id))
2268 priv->enet_ver = AE_VERSION_2;
2269 else
2270 return -ENXIO;
2271
2272 /* try to find port-idx-in-ae first */
2273 ret = acpi_node_get_property_reference(dev->fwnode,
2274 "ae-handle", 0, &args);
2275 if (ret) {
2276 dev_err(dev, "not find ae-handle\n");
2277 goto out_read_prop_fail;
2278 }
2279 priv->fwnode = acpi_fwnode_handle(args.adev);
2280 } else {
2281 dev_err(dev, "cannot read cfg data from OF or acpi\n");
2282 return -ENXIO;
48189d6a 2283 }
7b2acae6 2284
6162928c 2285 ret = device_property_read_u32(dev, "port-idx-in-ae", &port_id);
406adee9
YZZ		 2286 if (ret) {
2287 /* only for old code compatible */
6162928c 2288 ret = device_property_read_u32(dev, "port-id", &port_id);
406adee9
YZZ		 2289 if (ret)
2290 goto out_read_prop_fail;
2291 /* for old dts, we need to caculate the port offset */
2292 port_id = port_id < HNS_SRV_OFFSET ? port_id + HNS_DEBUG_OFFSET
2293 : port_id - HNS_SRV_OFFSET;
2294 }
2295 priv->port_id = port_id;
b5996f11 2296
2297 hns_init_mac_addr(ndev);
2298
2299 ndev->watchdog_timeo = HNS_NIC_TX_TIMEOUT;
2300 ndev->priv_flags |= IFF_UNICAST_FLT;
2301 ndev->netdev_ops = &hns_nic_netdev_ops;
2302 hns_ethtool_set_ops(ndev);
13ac695e 2303
b5996f11 2304 ndev->features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
2305 NETIF_F_RXCSUM | NETIF_F_SG | NETIF_F_GSO |
2306 NETIF_F_GRO;
2307 ndev->vlan_features |=
2308 NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM | NETIF_F_RXCSUM;
2309 ndev->vlan_features |= NETIF_F_SG | NETIF_F_GSO | NETIF_F_GRO;
2310
44770e11
JW		 2311 /* MTU range: 68 - 9578 (v1) or 9706 (v2) */
2312 ndev->min_mtu = MAC_MIN_MTU;
13ac695e
S		 2313 switch (priv->enet_ver) {
2314 case AE_VERSION_2:
64353af6 2315 ndev->features |= NETIF_F_TSO | NETIF_F_TSO6;
13ac695e
S		 2316 ndev->hw_features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
2317 NETIF_F_RXCSUM | NETIF_F_SG | NETIF_F_GSO |
64353af6 2318 NETIF_F_GRO | NETIF_F_TSO | NETIF_F_TSO6;
44770e11
JW		 2319 ndev->max_mtu = MAC_MAX_MTU_V2 -
2320 (ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN);
13ac695e
S		 2321 break;
2322 default:
44770e11
JW		 2323 ndev->max_mtu = MAC_MAX_MTU -
2324 (ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN);
13ac695e
S		 2325 break;
2326 }
2327
b5996f11 2328 SET_NETDEV_DEV(ndev, dev);
2329
2330 if (!dma_set_mask_and_coherent(dev, DMA_BIT_MASK(64)))
2331 dev_dbg(dev, "set mask to 64bit\n");
2332 else
39c94417 2333 dev_err(dev, "set mask to 64bit fail!\n");
b5996f11 2334
2335 /* carrier off reporting is important to ethtool even BEFORE open */
2336 netif_carrier_off(ndev);
2337
2338 setup_timer(&priv->service_timer, hns_nic_service_timer,
2339 (unsigned long)priv);
2340 INIT_WORK(&priv->service_task, hns_nic_service_task);
2341
2342 set_bit(NIC_STATE_SERVICE_INITED, &priv->state);
2343 clear_bit(NIC_STATE_SERVICE_SCHED, &priv->state);
2344 set_bit(NIC_STATE_DOWN, &priv->state);
2345
2346 if (hns_nic_try_get_ae(priv->netdev)) {
2347 priv->notifier_block.notifier_call = hns_nic_notifier_action;
2348 ret = hnae_register_notifier(&priv->notifier_block);
2349 if (ret) {
2350 dev_err(dev, "register notifier fail!\n");
2351 goto out_notify_fail;
2352 }
2353 dev_dbg(dev, "has not handle, register notifier!\n");
2354 }
2355
2356 return 0;
2357
2358out_notify_fail:
2359 (void)cancel_work_sync(&priv->service_task);
48189d6a 2360out_read_prop_fail:
b5996f11 2361 free_netdev(ndev);
2362 return ret;
2363}
2364
2365static int hns_nic_dev_remove(struct platform_device *pdev)
2366{
2367 struct net_device *ndev = platform_get_drvdata(pdev);
2368 struct hns_nic_priv *priv = netdev_priv(ndev);
2369
2370 if (ndev->reg_state != NETREG_UNINITIALIZED)
2371 unregister_netdev(ndev);
2372
2373 if (priv->ring_data)
2374 hns_nic_uninit_ring_data(priv);
2375 priv->ring_data = NULL;
2376
262b38cd
PR		 2377 if (ndev->phydev)
2378 phy_disconnect(ndev->phydev);
b5996f11 2379
2380 if (!IS_ERR_OR_NULL(priv->ae_handle))
2381 hnae_put_handle(priv->ae_handle);
2382 priv->ae_handle = NULL;
2383 if (priv->notifier_block.notifier_call)
2384 hnae_unregister_notifier(&priv->notifier_block);
2385 priv->notifier_block.notifier_call = NULL;
2386
2387 set_bit(NIC_STATE_REMOVING, &priv->state);
2388 (void)cancel_work_sync(&priv->service_task);
2389
2390 free_netdev(ndev);
2391 return 0;
2392}
2393
2394static const struct of_device_id hns_enet_of_match[] = {
2395 {.compatible = "hisilicon,hns-nic-v1",},
2396 {.compatible = "hisilicon,hns-nic-v2",},
2397 {},
2398};
2399
2400MODULE_DEVICE_TABLE(of, hns_enet_of_match);
2401
2402static struct platform_driver hns_nic_dev_driver = {
2403 .driver = {
2404 .name = "hns-nic",
b5996f11 2405 .of_match_table = hns_enet_of_match,
63434888 2406 .acpi_match_table = ACPI_PTR(hns_enet_acpi_match),
b5996f11 2407 },
2408 .probe = hns_nic_dev_probe,
2409 .remove = hns_nic_dev_remove,
2410};
2411
2412module_platform_driver(hns_nic_dev_driver);
2413
2414MODULE_DESCRIPTION("HISILICON HNS Ethernet driver");
2415MODULE_AUTHOR("Hisilicon, Inc.");
2416MODULE_LICENSE("GPL");
2417MODULE_ALIAS("platform:hns-nic");
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