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Merge tag 'for-linus-4.12b-rc0c-tag' of git://git.kernel.org/pub/scm/linux/kernel...
[linux-2.6-block.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
13ac695e
S		 303int hns_nic_net_xmit_hw(struct net_device *ndev,
304 struct sk_buff *skb,
305 struct hns_nic_ring_data *ring_data)
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
364 wmb(); /* commit all data before submit */
365 assert(skb->queue_mapping < priv->ae_handle->q_num);
366 hnae_queue_xmit(priv->ae_handle->qs[skb->queue_mapping], buf_num);
367 ring->stats.tx_pkts++;
368 ring->stats.tx_bytes += skb->len;
369
370 return NETDEV_TX_OK;
371
372out_map_frag_fail:
373
13ac695e 374 while (ring->next_to_use != next_to_use) {
b5996f11 375 unfill_desc(ring);
13ac695e
S		 376 if (ring->next_to_use != next_to_use)
377 dma_unmap_page(dev,
378 ring->desc_cb[ring->next_to_use].dma,
379 ring->desc_cb[ring->next_to_use].length,
380 DMA_TO_DEVICE);
381 else
382 dma_unmap_single(dev,
383 ring->desc_cb[next_to_use].dma,
384 ring->desc_cb[next_to_use].length,
385 DMA_TO_DEVICE);
b5996f11 386 }
387
b5996f11 388out_err_tx_ok:
389
390 dev_kfree_skb_any(skb);
391 return NETDEV_TX_OK;
392
393out_net_tx_busy:
394
395 netif_stop_subqueue(ndev, skb->queue_mapping);
396
397 /* Herbert's original patch had:
398 * smp_mb__after_netif_stop_queue();
399 * but since that doesn't exist yet, just open code it.
400 */
401 smp_mb();
402 return NETDEV_TX_BUSY;
403}
404
405/**
406 * hns_nic_get_headlen - determine size of header for RSC/LRO/GRO/FCOE
407 * @data: pointer to the start of the headers
408 * @max: total length of section to find headers in
409 *
410 * This function is meant to determine the length of headers that will
411 * be recognized by hardware for LRO, GRO, and RSC offloads. The main
412 * motivation of doing this is to only perform one pull for IPv4 TCP
413 * packets so that we can do basic things like calculating the gso_size
414 * based on the average data per packet.
415 **/
416static unsigned int hns_nic_get_headlen(unsigned char *data, u32 flag,
417 unsigned int max_size)
418{
419 unsigned char *network;
420 u8 hlen;
421
422 /* this should never happen, but better safe than sorry */
423 if (max_size < ETH_HLEN)
424 return max_size;
425
426 /* initialize network frame pointer */
427 network = data;
428
429 /* set first protocol and move network header forward */
430 network += ETH_HLEN;
431
432 /* handle any vlan tag if present */
433 if (hnae_get_field(flag, HNS_RXD_VLAN_M, HNS_RXD_VLAN_S)
434 == HNS_RX_FLAG_VLAN_PRESENT) {
435 if ((typeof(max_size))(network - data) > (max_size - VLAN_HLEN))
436 return max_size;
437
438 network += VLAN_HLEN;
439 }
440
441 /* handle L3 protocols */
442 if (hnae_get_field(flag, HNS_RXD_L3ID_M, HNS_RXD_L3ID_S)
443 == HNS_RX_FLAG_L3ID_IPV4) {
444 if ((typeof(max_size))(network - data) >
445 (max_size - sizeof(struct iphdr)))
446 return max_size;
447
448 /* access ihl as a u8 to avoid unaligned access on ia64 */
449 hlen = (network[0] & 0x0F) << 2;
450
451 /* verify hlen meets minimum size requirements */
452 if (hlen < sizeof(struct iphdr))
453 return network - data;
454
455 /* record next protocol if header is present */
456 } else if (hnae_get_field(flag, HNS_RXD_L3ID_M, HNS_RXD_L3ID_S)
457 == HNS_RX_FLAG_L3ID_IPV6) {
458 if ((typeof(max_size))(network - data) >
459 (max_size - sizeof(struct ipv6hdr)))
460 return max_size;
461
462 /* record next protocol */
463 hlen = sizeof(struct ipv6hdr);
464 } else {
465 return network - data;
466 }
467
468 /* relocate pointer to start of L4 header */
469 network += hlen;
470
471 /* finally sort out TCP/UDP */
472 if (hnae_get_field(flag, HNS_RXD_L4ID_M, HNS_RXD_L4ID_S)
473 == HNS_RX_FLAG_L4ID_TCP) {
474 if ((typeof(max_size))(network - data) >
475 (max_size - sizeof(struct tcphdr)))
476 return max_size;
477
478 /* access doff as a u8 to avoid unaligned access on ia64 */
479 hlen = (network[12] & 0xF0) >> 2;
480
481 /* verify hlen meets minimum size requirements */
482 if (hlen < sizeof(struct tcphdr))
483 return network - data;
484
485 network += hlen;
486 } else if (hnae_get_field(flag, HNS_RXD_L4ID_M, HNS_RXD_L4ID_S)
487 == HNS_RX_FLAG_L4ID_UDP) {
488 if ((typeof(max_size))(network - data) >
489 (max_size - sizeof(struct udphdr)))
490 return max_size;
491
492 network += sizeof(struct udphdr);
493 }
494
495 /* If everything has gone correctly network should be the
496 * data section of the packet and will be the end of the header.
497 * If not then it probably represents the end of the last recognized
498 * header.
499 */
500 if ((typeof(max_size))(network - data) < max_size)
501 return network - data;
502 else
503 return max_size;
504}
505
9cbe9fd5 506static void hns_nic_reuse_page(struct sk_buff *skb, int i,
507 struct hnae_ring *ring, int pull_len,
508 struct hnae_desc_cb *desc_cb)
b5996f11 509{
9cbe9fd5 510 struct hnae_desc *desc;
511 int truesize, size;
512 int last_offset;
be78a690
AB		 513 bool twobufs;
514
b4957ab0
S		 515 twobufs = ((PAGE_SIZE < 8192) &&
516 hnae_buf_size(ring) == HNS_BUFFER_SIZE_2048);
9cbe9fd5 517
518 desc = &ring->desc[ring->next_to_clean];
519 size = le16_to_cpu(desc->rx.size);
520
be78a690 521 if (twobufs) {
9cbe9fd5 522 truesize = hnae_buf_size(ring);
523 } else {
524 truesize = ALIGN(size, L1_CACHE_BYTES);
525 last_offset = hnae_page_size(ring) - hnae_buf_size(ring);
526 }
527
9cbe9fd5 528 skb_add_rx_frag(skb, i, desc_cb->priv, desc_cb->page_offset + pull_len,
529 size - pull_len, truesize - pull_len);
530
b5996f11 531 /* avoid re-using remote pages,flag default unreuse */
be78a690
AB		 532 if (unlikely(page_to_nid(desc_cb->priv) != numa_node_id()))
533 return;
534
535 if (twobufs) {
536 /* if we are only owner of page we can reuse it */
537 if (likely(page_count(desc_cb->priv) == 1)) {
538 /* flip page offset to other buffer */
539 desc_cb->page_offset ^= truesize;
b5996f11 540
b5996f11 541 desc_cb->reuse_flag = 1;
542 /* bump ref count on page before it is given*/
543 get_page(desc_cb->priv);
544 }
be78a690
AB		 545 return;
546 }
547
548 /* move offset up to the next cache line */
549 desc_cb->page_offset += truesize;
550
551 if (desc_cb->page_offset <= last_offset) {
552 desc_cb->reuse_flag = 1;
553 /* bump ref count on page before it is given*/
554 get_page(desc_cb->priv);
b5996f11 555 }
556}
557
13ac695e
S		 558static void get_v2rx_desc_bnum(u32 bnum_flag, int *out_bnum)
559{
560 *out_bnum = hnae_get_field(bnum_flag,
561 HNS_RXD_BUFNUM_M, HNS_RXD_BUFNUM_S) + 1;
562}
563
564static void get_rx_desc_bnum(u32 bnum_flag, int *out_bnum)
565{
566 *out_bnum = hnae_get_field(bnum_flag,
567 HNS_RXD_BUFNUM_M, HNS_RXD_BUFNUM_S);
568}
569
862b3d20
S		 570static void hns_nic_rx_checksum(struct hns_nic_ring_data *ring_data,
571 struct sk_buff *skb, u32 flag)
572{
573 struct net_device *netdev = ring_data->napi.dev;
574 u32 l3id;
575 u32 l4id;
576
577 /* check if RX checksum offload is enabled */
578 if (unlikely(!(netdev->features & NETIF_F_RXCSUM)))
579 return;
580
581 /* In hardware, we only support checksum for the following protocols:
582 * 1) IPv4,
583 * 2) TCP(over IPv4 or IPv6),
584 * 3) UDP(over IPv4 or IPv6),
585 * 4) SCTP(over IPv4 or IPv6)
586 * but we support many L3(IPv4, IPv6, MPLS, PPPoE etc) and L4(TCP,
587 * UDP, GRE, SCTP, IGMP, ICMP etc.) protocols.
588 *
589 * Hardware limitation:
590 * Our present hardware RX Descriptor lacks L3/L4 checksum "Status &
591 * Error" bit (which usually can be used to indicate whether checksum
592 * was calculated by the hardware and if there was any error encountered
593 * during checksum calculation).
594 *
595 * Software workaround:
596 * We do get info within the RX descriptor about the kind of L3/L4
597 * protocol coming in the packet and the error status. These errors
598 * might not just be checksum errors but could be related to version,
599 * length of IPv4, UDP, TCP etc.
600 * Because there is no-way of knowing if it is a L3/L4 error due to bad
601 * checksum or any other L3/L4 error, we will not (cannot) convey
602 * checksum status for such cases to upper stack and will not maintain
603 * the RX L3/L4 checksum counters as well.
604 */
605
606 l3id = hnae_get_field(flag, HNS_RXD_L3ID_M, HNS_RXD_L3ID_S);
607 l4id = hnae_get_field(flag, HNS_RXD_L4ID_M, HNS_RXD_L4ID_S);
608
609 /* check L3 protocol for which checksum is supported */
610 if ((l3id != HNS_RX_FLAG_L3ID_IPV4) && (l3id != HNS_RX_FLAG_L3ID_IPV6))
611 return;
612
613 /* check for any(not just checksum)flagged L3 protocol errors */
614 if (unlikely(hnae_get_bit(flag, HNS_RXD_L3E_B)))
615 return;
616
617 /* we do not support checksum of fragmented packets */
618 if (unlikely(hnae_get_bit(flag, HNS_RXD_FRAG_B)))
619 return;
620
621 /* check L4 protocol for which checksum is supported */
622 if ((l4id != HNS_RX_FLAG_L4ID_TCP) &&
623 (l4id != HNS_RX_FLAG_L4ID_UDP) &&
624 (l4id != HNS_RX_FLAG_L4ID_SCTP))
625 return;
626
627 /* check for any(not just checksum)flagged L4 protocol errors */
628 if (unlikely(hnae_get_bit(flag, HNS_RXD_L4E_B)))
629 return;
630
631 /* now, this has to be a packet with valid RX checksum */
632 skb->ip_summed = CHECKSUM_UNNECESSARY;
633}
634
b5996f11 635static int hns_nic_poll_rx_skb(struct hns_nic_ring_data *ring_data,
636 struct sk_buff **out_skb, int *out_bnum)
637{
638 struct hnae_ring *ring = ring_data->ring;
639 struct net_device *ndev = ring_data->napi.dev;
13ac695e 640 struct hns_nic_priv *priv = netdev_priv(ndev);
b5996f11 641 struct sk_buff *skb;
642 struct hnae_desc *desc;
643 struct hnae_desc_cb *desc_cb;
644 unsigned char *va;
9cbe9fd5 645 int bnum, length, i;
b5996f11 646 int pull_len;
647 u32 bnum_flag;
648
b5996f11 649 desc = &ring->desc[ring->next_to_clean];
650 desc_cb = &ring->desc_cb[ring->next_to_clean];
13ac695e
S		 651
652 prefetch(desc);
653
b5996f11 654 va = (unsigned char *)desc_cb->buf + desc_cb->page_offset;
655
13ac695e
S		 656 /* prefetch first cache line of first page */
657 prefetch(va);
658#if L1_CACHE_BYTES < 128
659 prefetch(va + L1_CACHE_BYTES);
660#endif
661
662 skb = *out_skb = napi_alloc_skb(&ring_data->napi,
663 HNS_RX_HEAD_SIZE);
b5996f11 664 if (unlikely(!skb)) {
665 netdev_err(ndev, "alloc rx skb fail\n");
666 ring->stats.sw_err_cnt++;
667 return -ENOMEM;
668 }
669
9cbe9fd5 670 prefetchw(skb->data);
13ac695e
S		 671 length = le16_to_cpu(desc->rx.pkt_len);
672 bnum_flag = le32_to_cpu(desc->rx.ipoff_bnum_pid_flag);
673 priv->ops.get_rxd_bnum(bnum_flag, &bnum);
674 *out_bnum = bnum;
675
b5996f11 676 if (length <= HNS_RX_HEAD_SIZE) {
677 memcpy(__skb_put(skb, length), va, ALIGN(length, sizeof(long)));
678
679 /* we can reuse buffer as-is, just make sure it is local */
680 if (likely(page_to_nid(desc_cb->priv) == numa_node_id()))
681 desc_cb->reuse_flag = 1;
682 else /* this page cannot be reused so discard it */
683 put_page(desc_cb->priv);
684
685 ring_ptr_move_fw(ring, next_to_clean);
686
687 if (unlikely(bnum != 1)) { /* check err*/
688 *out_bnum = 1;
689 goto out_bnum_err;
690 }
691 } else {
692 ring->stats.seg_pkt_cnt++;
693
694 pull_len = hns_nic_get_headlen(va, bnum_flag, HNS_RX_HEAD_SIZE);
695 memcpy(__skb_put(skb, pull_len), va,
696 ALIGN(pull_len, sizeof(long)));
697
9cbe9fd5 698 hns_nic_reuse_page(skb, 0, ring, pull_len, desc_cb);
b5996f11 699 ring_ptr_move_fw(ring, next_to_clean);
700
701 if (unlikely(bnum >= (int)MAX_SKB_FRAGS)) { /* check err*/
702 *out_bnum = 1;
703 goto out_bnum_err;
704 }
705 for (i = 1; i < bnum; i++) {
706 desc = &ring->desc[ring->next_to_clean];
707 desc_cb = &ring->desc_cb[ring->next_to_clean];
b5996f11 708
9cbe9fd5 709 hns_nic_reuse_page(skb, i, ring, 0, desc_cb);
b5996f11 710 ring_ptr_move_fw(ring, next_to_clean);
711 }
712 }
713
714 /* check except process, free skb and jump the desc */
715 if (unlikely((!bnum) || (bnum > ring->max_desc_num_per_pkt))) {
716out_bnum_err:
717 *out_bnum = *out_bnum ? *out_bnum : 1; /* ntc moved,cannot 0*/
718 netdev_err(ndev, "invalid bnum(%d,%d,%d,%d),%016llx,%016llx\n",
719 bnum, ring->max_desc_num_per_pkt,
720 length, (int)MAX_SKB_FRAGS,
721 ((u64 *)desc)[0], ((u64 *)desc)[1]);
722 ring->stats.err_bd_num++;
723 dev_kfree_skb_any(skb);
724 return -EDOM;
725 }
726
727 bnum_flag = le32_to_cpu(desc->rx.ipoff_bnum_pid_flag);
728
729 if (unlikely(!hnae_get_bit(bnum_flag, HNS_RXD_VLD_B))) {
730 netdev_err(ndev, "no valid bd,%016llx,%016llx\n",
731 ((u64 *)desc)[0], ((u64 *)desc)[1]);
732 ring->stats.non_vld_descs++;
733 dev_kfree_skb_any(skb);
734 return -EINVAL;
735 }
736
737 if (unlikely((!desc->rx.pkt_len) ||
738 hnae_get_bit(bnum_flag, HNS_RXD_DROP_B))) {
b5996f11 739 ring->stats.err_pkt_len++;
740 dev_kfree_skb_any(skb);
741 return -EFAULT;
742 }
743
744 if (unlikely(hnae_get_bit(bnum_flag, HNS_RXD_L2E_B))) {
b5996f11 745 ring->stats.l2_err++;
746 dev_kfree_skb_any(skb);
747 return -EFAULT;
748 }
749
750 ring->stats.rx_pkts++;
751 ring->stats.rx_bytes += skb->len;
752
862b3d20
S		 753 /* indicate to upper stack if our hardware has already calculated
754 * the RX checksum
755 */
756 hns_nic_rx_checksum(ring_data, skb, bnum_flag);
b5996f11 757
758 return 0;
759}
760
761static void
762hns_nic_alloc_rx_buffers(struct hns_nic_ring_data *ring_data, int cleand_count)
763{
764 int i, ret;
765 struct hnae_desc_cb res_cbs;
766 struct hnae_desc_cb *desc_cb;
767 struct hnae_ring *ring = ring_data->ring;
768 struct net_device *ndev = ring_data->napi.dev;
769
770 for (i = 0; i < cleand_count; i++) {
771 desc_cb = &ring->desc_cb[ring->next_to_use];
772 if (desc_cb->reuse_flag) {
773 ring->stats.reuse_pg_cnt++;
774 hnae_reuse_buffer(ring, ring->next_to_use);
775 } else {
776 ret = hnae_reserve_buffer_map(ring, &res_cbs);
777 if (ret) {
778 ring->stats.sw_err_cnt++;
779 netdev_err(ndev, "hnae reserve buffer map failed.\n");
780 break;
781 }
782 hnae_replace_buffer(ring, ring->next_to_use, &res_cbs);
783 }
784
785 ring_ptr_move_fw(ring, next_to_use);
786 }
787
788 wmb(); /* make all data has been write before submit */
789 writel_relaxed(i, ring->io_base + RCB_REG_HEAD);
790}
791
792/* return error number for error or number of desc left to take
793 */
794static void hns_nic_rx_up_pro(struct hns_nic_ring_data *ring_data,
795 struct sk_buff *skb)
796{
797 struct net_device *ndev = ring_data->napi.dev;
798
799 skb->protocol = eth_type_trans(skb, ndev);
800 (void)napi_gro_receive(&ring_data->napi, skb);
b5996f11 801}
802
0e97cd4e 803static int hns_desc_unused(struct hnae_ring *ring)
804{
805 int ntc = ring->next_to_clean;
806 int ntu = ring->next_to_use;
807
808 return ((ntc >= ntu) ? 0 : ring->desc_num) + ntc - ntu;
809}
810
b5996f11 811static int hns_nic_rx_poll_one(struct hns_nic_ring_data *ring_data,
812 int budget, void *v)
813{
814 struct hnae_ring *ring = ring_data->ring;
815 struct sk_buff *skb;
34447271 816 int num, bnum;
b5996f11 817#define RCB_NOF_ALLOC_RX_BUFF_ONCE 16
818 int recv_pkts, recv_bds, clean_count, err;
0e97cd4e 819 int unused_count = hns_desc_unused(ring);
b5996f11 820
821 num = readl_relaxed(ring->io_base + RCB_REG_FBDNUM);
822 rmb(); /* make sure num taken effect before the other data is touched */
823
824 recv_pkts = 0, recv_bds = 0, clean_count = 0;
0e97cd4e 825 num -= unused_count;
34447271 826
b5996f11 827 while (recv_pkts < budget && recv_bds < num) {
6ba312eb 828 /* reuse or realloc buffers */
0e97cd4e 829 if (clean_count + unused_count >= RCB_NOF_ALLOC_RX_BUFF_ONCE) {
830 hns_nic_alloc_rx_buffers(ring_data,
831 clean_count + unused_count);
b5996f11 832 clean_count = 0;
0e97cd4e 833 unused_count = hns_desc_unused(ring);
b5996f11 834 }
835
6ba312eb 836 /* poll one pkt */
b5996f11 837 err = hns_nic_poll_rx_skb(ring_data, &skb, &bnum);
838 if (unlikely(!skb)) /* this fault cannot be repaired */
3a31b64e 839 goto out;
b5996f11 840
841 recv_bds += bnum;
842 clean_count += bnum;
843 if (unlikely(err)) { /* do jump the err */
844 recv_pkts++;
845 continue;
846 }
847
848 /* do update ip stack process*/
849 ((void (*)(struct hns_nic_ring_data *, struct sk_buff *))v)(
850 ring_data, skb);
851 recv_pkts++;
852 }
853
3a31b64e 854out:
13ac695e 855 /* make all data has been write before submit */
0e97cd4e 856 if (clean_count + unused_count > 0)
857 hns_nic_alloc_rx_buffers(ring_data,
858 clean_count + unused_count);
13ac695e 859
b5996f11 860 return recv_pkts;
861}
862
36eedfde 863static bool hns_nic_rx_fini_pro(struct hns_nic_ring_data *ring_data)
b5996f11 864{
865 struct hnae_ring *ring = ring_data->ring;
866 int num = 0;
867
cee5add4
DH		 868 ring_data->ring->q->handle->dev->ops->toggle_ring_irq(ring, 0);
869
b5996f11 870 /* for hardware bug fixed */
871 num = readl_relaxed(ring->io_base + RCB_REG_FBDNUM);
872
873 if (num > 0) {
874 ring_data->ring->q->handle->dev->ops->toggle_ring_irq(
875 ring_data->ring, 1);
876
36eedfde 877 return false;
878 } else {
879 return true;
b5996f11 880 }
881}
882
36eedfde 883static bool hns_nic_rx_fini_pro_v2(struct hns_nic_ring_data *ring_data)
cee5add4
DH		 884{
885 struct hnae_ring *ring = ring_data->ring;
36eedfde 886 int num;
cee5add4
DH		 887
888 num = readl_relaxed(ring->io_base + RCB_REG_FBDNUM);
889
36eedfde 890 if (!num)
891 return true;
cee5add4 892 else
36eedfde 893 return false;
cee5add4
DH		 894}
895
b5996f11 896static inline void hns_nic_reclaim_one_desc(struct hnae_ring *ring,
897 int *bytes, int *pkts)
898{
899 struct hnae_desc_cb *desc_cb = &ring->desc_cb[ring->next_to_clean];
900
901 (*pkts) += (desc_cb->type == DESC_TYPE_SKB);
902 (*bytes) += desc_cb->length;
903 /* desc_cb will be cleaned, after hnae_free_buffer_detach*/
904 hnae_free_buffer_detach(ring, ring->next_to_clean);
905
906 ring_ptr_move_fw(ring, next_to_clean);
907}
908
909static int is_valid_clean_head(struct hnae_ring *ring, int h)
910{
911 int u = ring->next_to_use;
912 int c = ring->next_to_clean;
913
914 if (unlikely(h > ring->desc_num))
915 return 0;
916
917 assert(u > 0 && u < ring->desc_num);
918 assert(c > 0 && c < ring->desc_num);
919 assert(u != c && h != c); /* must be checked before call this func */
920
921 return u > c ? (h > c && h <= u) : (h > c || h <= u);
922}
923
924/* netif_tx_lock will turn down the performance, set only when necessary */
925#ifdef CONFIG_NET_POLL_CONTROLLER
b4957ab0
S		 926#define NETIF_TX_LOCK(ring) spin_lock(&(ring)->lock)
927#define NETIF_TX_UNLOCK(ring) spin_unlock(&(ring)->lock)
b5996f11 928#else
f2aaed55 929#define NETIF_TX_LOCK(ring)
930#define NETIF_TX_UNLOCK(ring)
b5996f11 931#endif
f2aaed55 932
b5996f11 933/* reclaim all desc in one budget
934 * return error or number of desc left
935 */
936static int hns_nic_tx_poll_one(struct hns_nic_ring_data *ring_data,
937 int budget, void *v)
938{
939 struct hnae_ring *ring = ring_data->ring;
940 struct net_device *ndev = ring_data->napi.dev;
941 struct netdev_queue *dev_queue;
942 struct hns_nic_priv *priv = netdev_priv(ndev);
943 int head;
944 int bytes, pkts;
945
f2aaed55 946 NETIF_TX_LOCK(ring);
b5996f11 947
948 head = readl_relaxed(ring->io_base + RCB_REG_HEAD);
949 rmb(); /* make sure head is ready before touch any data */
950
951 if (is_ring_empty(ring) || head == ring->next_to_clean) {
f2aaed55 952 NETIF_TX_UNLOCK(ring);
b5996f11 953 return 0; /* no data to poll */
954 }
955
956 if (!is_valid_clean_head(ring, head)) {
957 netdev_err(ndev, "wrong head (%d, %d-%d)\n", head,
958 ring->next_to_use, ring->next_to_clean);
959 ring->stats.io_err_cnt++;
f2aaed55 960 NETIF_TX_UNLOCK(ring);
b5996f11 961 return -EIO;
962 }
963
964 bytes = 0;
965 pkts = 0;
9cbe9fd5 966 while (head != ring->next_to_clean) {
b5996f11 967 hns_nic_reclaim_one_desc(ring, &bytes, &pkts);
9cbe9fd5 968 /* issue prefetch for next Tx descriptor */
969 prefetch(&ring->desc_cb[ring->next_to_clean]);
970 }
b5996f11 971
f2aaed55 972 NETIF_TX_UNLOCK(ring);
b5996f11 973
974 dev_queue = netdev_get_tx_queue(ndev, ring_data->queue_index);
975 netdev_tx_completed_queue(dev_queue, pkts, bytes);
976
13ac695e
S		 977 if (unlikely(priv->link && !netif_carrier_ok(ndev)))
978 netif_carrier_on(ndev);
979
b5996f11 980 if (unlikely(pkts && netif_carrier_ok(ndev) &&
981 (ring_space(ring) >= ring->max_desc_num_per_pkt * 2))) {
982 /* Make sure that anybody stopping the queue after this
983 * sees the new next_to_clean.
984 */
985 smp_mb();
986 if (netif_tx_queue_stopped(dev_queue) &&
987 !test_bit(NIC_STATE_DOWN, &priv->state)) {
988 netif_tx_wake_queue(dev_queue);
989 ring->stats.restart_queue++;
990 }
991 }
992 return 0;
993}
994
36eedfde 995static bool hns_nic_tx_fini_pro(struct hns_nic_ring_data *ring_data)
b5996f11 996{
997 struct hnae_ring *ring = ring_data->ring;
cee5add4
DH		 998 int head;
999
1000 ring_data->ring->q->handle->dev->ops->toggle_ring_irq(ring, 0);
1001
1002 head = readl_relaxed(ring->io_base + RCB_REG_HEAD);
b5996f11 1003
1004 if (head != ring->next_to_clean) {
1005 ring_data->ring->q->handle->dev->ops->toggle_ring_irq(
1006 ring_data->ring, 1);
1007
36eedfde 1008 return false;
1009 } else {
1010 return true;
b5996f11 1011 }
1012}
1013
36eedfde 1014static bool hns_nic_tx_fini_pro_v2(struct hns_nic_ring_data *ring_data)
cee5add4
DH		 1015{
1016 struct hnae_ring *ring = ring_data->ring;
1017 int head = readl_relaxed(ring->io_base + RCB_REG_HEAD);
1018
1019 if (head == ring->next_to_clean)
36eedfde 1020 return true;
cee5add4 1021 else
36eedfde 1022 return false;
cee5add4
DH		 1023}
1024
b5996f11 1025static void hns_nic_tx_clr_all_bufs(struct hns_nic_ring_data *ring_data)
1026{
1027 struct hnae_ring *ring = ring_data->ring;
1028 struct net_device *ndev = ring_data->napi.dev;
1029 struct netdev_queue *dev_queue;
1030 int head;
1031 int bytes, pkts;
1032
f2aaed55 1033 NETIF_TX_LOCK(ring);
b5996f11 1034
1035 head = ring->next_to_use; /* ntu :soft setted ring position*/
1036 bytes = 0;
1037 pkts = 0;
1038 while (head != ring->next_to_clean)
1039 hns_nic_reclaim_one_desc(ring, &bytes, &pkts);
1040
f2aaed55 1041 NETIF_TX_UNLOCK(ring);
b5996f11 1042
1043 dev_queue = netdev_get_tx_queue(ndev, ring_data->queue_index);
1044 netdev_tx_reset_queue(dev_queue);
1045}
1046
1047static int hns_nic_common_poll(struct napi_struct *napi, int budget)
1048{
36eedfde 1049 int clean_complete = 0;
b5996f11 1050 struct hns_nic_ring_data *ring_data =
1051 container_of(napi, struct hns_nic_ring_data, napi);
36eedfde 1052 struct hnae_ring *ring = ring_data->ring;
b5996f11 1053
36eedfde 1054try_again:
1055 clean_complete += ring_data->poll_one(
1056 ring_data, budget - clean_complete,
1057 ring_data->ex_process);
1058
1059 if (clean_complete < budget) {
1060 if (ring_data->fini_process(ring_data)) {
1061 napi_complete(napi);
1062 ring->q->handle->dev->ops->toggle_ring_irq(ring, 0);
1063 } else {
1064 goto try_again;
1065 }
b5996f11 1066 }
1067
1068 return clean_complete;
1069}
1070
1071static irqreturn_t hns_irq_handle(int irq, void *dev)
1072{
1073 struct hns_nic_ring_data *ring_data = (struct hns_nic_ring_data *)dev;
1074
1075 ring_data->ring->q->handle->dev->ops->toggle_ring_irq(
1076 ring_data->ring, 1);
1077 napi_schedule(&ring_data->napi);
1078
1079 return IRQ_HANDLED;
1080}
1081
1082/**
1083 *hns_nic_adjust_link - adjust net work mode by the phy stat or new param
1084 *@ndev: net device
1085 */
1086static void hns_nic_adjust_link(struct net_device *ndev)
1087{
1088 struct hns_nic_priv *priv = netdev_priv(ndev);
1089 struct hnae_handle *h = priv->ae_handle;
bb7189dc
QX		 1090 int state = 1;
1091
262b38cd 1092 if (ndev->phydev) {
bb7189dc
QX		 1093 h->dev->ops->adjust_link(h, ndev->phydev->speed,
1094 ndev->phydev->duplex);
262b38cd 1095 state = ndev->phydev->link;
bb7189dc
QX		 1096 }
1097 state = state && h->dev->ops->get_status(h);
b5996f11 1098
bb7189dc
QX		 1099 if (state != priv->link) {
1100 if (state) {
1101 netif_carrier_on(ndev);
1102 netif_tx_wake_all_queues(ndev);
1103 netdev_info(ndev, "link up\n");
1104 } else {
1105 netif_carrier_off(ndev);
1106 netdev_info(ndev, "link down\n");
1107 }
1108 priv->link = state;
1109 }
b5996f11 1110}
1111
1112/**
1113 *hns_nic_init_phy - init phy
1114 *@ndev: net device
1115 *@h: ae handle
1116 * Return 0 on success, negative on failure
1117 */
1118int hns_nic_init_phy(struct net_device *ndev, struct hnae_handle *h)
1119{
652d39b0
KY		 1120 struct phy_device *phy_dev = h->phy_dev;
1121 int ret;
b5996f11 1122
652d39b0 1123 if (!h->phy_dev)
b5996f11 1124 return 0;
1125
652d39b0
KY		 1126 if (h->phy_if != PHY_INTERFACE_MODE_XGMII) {
1127 phy_dev->dev_flags = 0;
b5996f11 1128
652d39b0
KY		 1129 ret = phy_connect_direct(ndev, phy_dev, hns_nic_adjust_link,
1130 h->phy_if);
1131 } else {
1132 ret = phy_attach_direct(ndev, phy_dev, 0, h->phy_if);
1133 }
1134 if (unlikely(ret))
1135 return -ENODEV;
b5996f11 1136
1137 phy_dev->supported &= h->if_support;
1138 phy_dev->advertising = phy_dev->supported;
1139
1140 if (h->phy_if == PHY_INTERFACE_MODE_XGMII)
1141 phy_dev->autoneg = false;
1142
b5996f11 1143 return 0;
1144}
1145
1146static int hns_nic_ring_open(struct net_device *netdev, int idx)
1147{
1148 struct hns_nic_priv *priv = netdev_priv(netdev);
1149 struct hnae_handle *h = priv->ae_handle;
1150
1151 napi_enable(&priv->ring_data[idx].napi);
1152
1153 enable_irq(priv->ring_data[idx].ring->irq);
1154 h->dev->ops->toggle_ring_irq(priv->ring_data[idx].ring, 0);
1155
1156 return 0;
1157}
1158
1159static int hns_nic_net_set_mac_address(struct net_device *ndev, void *p)
1160{
1161 struct hns_nic_priv *priv = netdev_priv(ndev);
1162 struct hnae_handle *h = priv->ae_handle;
1163 struct sockaddr *mac_addr = p;
1164 int ret;
1165
1166 if (!mac_addr || !is_valid_ether_addr((const u8 *)mac_addr->sa_data))
1167 return -EADDRNOTAVAIL;
1168
1169 ret = h->dev->ops->set_mac_addr(h, mac_addr->sa_data);
1170 if (ret) {
1171 netdev_err(ndev, "set_mac_address fail, ret=%d!\n", ret);
1172 return ret;
1173 }
1174
1175 memcpy(ndev->dev_addr, mac_addr->sa_data, ndev->addr_len);
1176
1177 return 0;
1178}
1179
1180void hns_nic_update_stats(struct net_device *netdev)
1181{
1182 struct hns_nic_priv *priv = netdev_priv(netdev);
1183 struct hnae_handle *h = priv->ae_handle;
1184
1185 h->dev->ops->update_stats(h, &netdev->stats);
1186}
1187
1188/* set mac addr if it is configed. or leave it to the AE driver */
1189static void hns_init_mac_addr(struct net_device *ndev)
1190{
1191 struct hns_nic_priv *priv = netdev_priv(ndev);
b5996f11 1192
6162928c 1193 if (!device_get_mac_address(priv->dev, ndev->dev_addr, ETH_ALEN)) {
b5996f11 1194 eth_hw_addr_random(ndev);
1195 dev_warn(priv->dev, "No valid mac, use random mac %pM",
1196 ndev->dev_addr);
1197 }
1198}
1199
1200static void hns_nic_ring_close(struct net_device *netdev, int idx)
1201{
1202 struct hns_nic_priv *priv = netdev_priv(netdev);
1203 struct hnae_handle *h = priv->ae_handle;
1204
1205 h->dev->ops->toggle_ring_irq(priv->ring_data[idx].ring, 1);
1206 disable_irq(priv->ring_data[idx].ring->irq);
1207
1208 napi_disable(&priv->ring_data[idx].napi);
1209}
1210
ba2d0791 1211static int hns_nic_init_affinity_mask(int q_num, int ring_idx,
1212 struct hnae_ring *ring, cpumask_t *mask)
b5996f11 1213{
b5996f11 1214 int cpu;
ff3edc9b 1215
ba2d0791 1216 /* Diffrent irq banlance between 16core and 32core.
1217 * The cpu mask set by ring index according to the ring flag
1218 * which indicate the ring is tx or rx.
1219 */
1220 if (q_num == num_possible_cpus()) {
1221 if (is_tx_ring(ring))
1222 cpu = ring_idx;
1223 else
1224 cpu = ring_idx - q_num;
13ac695e 1225 } else {
ba2d0791 1226 if (is_tx_ring(ring))
1227 cpu = ring_idx * 2;
1228 else
1229 cpu = (ring_idx - q_num) * 2 + 1;
13ac695e 1230 }
ff3edc9b 1231
ba2d0791 1232 cpumask_clear(mask);
1233 cpumask_set_cpu(cpu, mask);
1234
1235 return cpu;
13ac695e
S		 1236}
1237
1238static int hns_nic_init_irq(struct hns_nic_priv *priv)
1239{
1240 struct hnae_handle *h = priv->ae_handle;
1241 struct hns_nic_ring_data *rd;
1242 int i;
1243 int ret;
ba2d0791 1244 int cpu;
13ac695e 1245
b5996f11 1246 for (i = 0; i < h->q_num * 2; i++) {
1247 rd = &priv->ring_data[i];
1248
1249 if (rd->ring->irq_init_flag == RCB_IRQ_INITED)
1250 break;
1251
1252 snprintf(rd->ring->ring_name, RCB_RING_NAME_LEN,
1253 "%s-%s%d", priv->netdev->name,
ba2d0791 1254 (is_tx_ring(rd->ring) ? "tx" : "rx"), rd->queue_index);
b5996f11 1255
1256 rd->ring->ring_name[RCB_RING_NAME_LEN - 1] = '\0';
1257
1258 ret = request_irq(rd->ring->irq,
1259 hns_irq_handle, 0, rd->ring->ring_name, rd);
1260 if (ret) {
1261 netdev_err(priv->netdev, "request irq(%d) fail\n",
1262 rd->ring->irq);
1263 return ret;
1264 }
1265 disable_irq(rd->ring->irq);
ba2d0791 1266
1267 cpu = hns_nic_init_affinity_mask(h->q_num, i,
1268 rd->ring, &rd->mask);
1269
1270 if (cpu_online(cpu))
1271 irq_set_affinity_hint(rd->ring->irq,
1272 &rd->mask);
1273
b5996f11 1274 rd->ring->irq_init_flag = RCB_IRQ_INITED;
b5996f11 1275 }
1276
1277 return 0;
1278}
1279
1280static int hns_nic_net_up(struct net_device *ndev)
1281{
1282 struct hns_nic_priv *priv = netdev_priv(ndev);
1283 struct hnae_handle *h = priv->ae_handle;
454784d8 1284 int i, j;
b5996f11 1285 int ret;
1286
1287 ret = hns_nic_init_irq(priv);
1288 if (ret != 0) {
1289 netdev_err(ndev, "hns init irq failed! ret=%d\n", ret);
1290 return ret;
1291 }
1292
1293 for (i = 0; i < h->q_num * 2; i++) {
1294 ret = hns_nic_ring_open(ndev, i);
1295 if (ret)
1296 goto out_has_some_queues;
1297 }
1298
b5996f11 1299 ret = h->dev->ops->set_mac_addr(h, ndev->dev_addr);
1300 if (ret)
1301 goto out_set_mac_addr_err;
1302
1303 ret = h->dev->ops->start ? h->dev->ops->start(h) : 0;
1304 if (ret)
1305 goto out_start_err;
1306
262b38cd
PR		 1307 if (ndev->phydev)
1308 phy_start(ndev->phydev);
b5996f11 1309
1310 clear_bit(NIC_STATE_DOWN, &priv->state);
1311 (void)mod_timer(&priv->service_timer, jiffies + SERVICE_TIMER_HZ);
1312
1313 return 0;
1314
1315out_start_err:
1316 netif_stop_queue(ndev);
1317out_set_mac_addr_err:
b5996f11 1318out_has_some_queues:
1319 for (j = i - 1; j >= 0; j--)
1320 hns_nic_ring_close(ndev, j);
1321
1322 set_bit(NIC_STATE_DOWN, &priv->state);
1323
1324 return ret;
1325}
1326
1327static void hns_nic_net_down(struct net_device *ndev)
1328{
1329 int i;
1330 struct hnae_ae_ops *ops;
1331 struct hns_nic_priv *priv = netdev_priv(ndev);
1332
1333 if (test_and_set_bit(NIC_STATE_DOWN, &priv->state))
1334 return;
1335
1336 (void)del_timer_sync(&priv->service_timer);
1337 netif_tx_stop_all_queues(ndev);
1338 netif_carrier_off(ndev);
1339 netif_tx_disable(ndev);
1340 priv->link = 0;
1341
262b38cd
PR		 1342 if (ndev->phydev)
1343 phy_stop(ndev->phydev);
b5996f11 1344
1345 ops = priv->ae_handle->dev->ops;
1346
1347 if (ops->stop)
1348 ops->stop(priv->ae_handle);
1349
1350 netif_tx_stop_all_queues(ndev);
1351
1352 for (i = priv->ae_handle->q_num - 1; i >= 0; i--) {
1353 hns_nic_ring_close(ndev, i);
1354 hns_nic_ring_close(ndev, i + priv->ae_handle->q_num);
1355
1356 /* clean tx buffers*/
1357 hns_nic_tx_clr_all_bufs(priv->ring_data + i);
1358 }
1359}
1360
1361void hns_nic_net_reset(struct net_device *ndev)
1362{
1363 struct hns_nic_priv *priv = netdev_priv(ndev);
1364 struct hnae_handle *handle = priv->ae_handle;
1365
1366 while (test_and_set_bit(NIC_STATE_RESETTING, &priv->state))
1367 usleep_range(1000, 2000);
1368
1369 (void)hnae_reinit_handle(handle);
1370
1371 clear_bit(NIC_STATE_RESETTING, &priv->state);
1372}
1373
1374void hns_nic_net_reinit(struct net_device *netdev)
1375{
1376 struct hns_nic_priv *priv = netdev_priv(netdev);
1377
860e9538 1378 netif_trans_update(priv->netdev);
b5996f11 1379 while (test_and_set_bit(NIC_STATE_REINITING, &priv->state))
1380 usleep_range(1000, 2000);
1381
1382 hns_nic_net_down(netdev);
1383 hns_nic_net_reset(netdev);
1384 (void)hns_nic_net_up(netdev);
1385 clear_bit(NIC_STATE_REINITING, &priv->state);
1386}
1387
1388static int hns_nic_net_open(struct net_device *ndev)
1389{
1390 struct hns_nic_priv *priv = netdev_priv(ndev);
1391 struct hnae_handle *h = priv->ae_handle;
1392 int ret;
1393
1394 if (test_bit(NIC_STATE_TESTING, &priv->state))
1395 return -EBUSY;
1396
1397 priv->link = 0;
1398 netif_carrier_off(ndev);
1399
1400 ret = netif_set_real_num_tx_queues(ndev, h->q_num);
1401 if (ret < 0) {
1402 netdev_err(ndev, "netif_set_real_num_tx_queues fail, ret=%d!\n",
1403 ret);
1404 return ret;
1405 }
1406
1407 ret = netif_set_real_num_rx_queues(ndev, h->q_num);
1408 if (ret < 0) {
1409 netdev_err(ndev,
1410 "netif_set_real_num_rx_queues fail, ret=%d!\n", ret);
1411 return ret;
1412 }
1413
1414 ret = hns_nic_net_up(ndev);
1415 if (ret) {
1416 netdev_err(ndev,
1417 "hns net up fail, ret=%d!\n", ret);
1418 return ret;
1419 }
1420
1421 return 0;
1422}
1423
1424static int hns_nic_net_stop(struct net_device *ndev)
1425{
1426 hns_nic_net_down(ndev);
1427
1428 return 0;
1429}
1430
1431static void hns_tx_timeout_reset(struct hns_nic_priv *priv);
1432static void hns_nic_net_timeout(struct net_device *ndev)
1433{
1434 struct hns_nic_priv *priv = netdev_priv(ndev);
1435
1436 hns_tx_timeout_reset(priv);
1437}
1438
1439static int hns_nic_do_ioctl(struct net_device *netdev, struct ifreq *ifr,
1440 int cmd)
1441{
262b38cd 1442 struct phy_device *phy_dev = netdev->phydev;
b5996f11 1443
1444 if (!netif_running(netdev))
1445 return -EINVAL;
1446
1447 if (!phy_dev)
1448 return -ENOTSUPP;
1449
1450 return phy_mii_ioctl(phy_dev, ifr, cmd);
1451}
1452
1453/* use only for netconsole to poll with the device without interrupt */
1454#ifdef CONFIG_NET_POLL_CONTROLLER
1455void hns_nic_poll_controller(struct net_device *ndev)
1456{
1457 struct hns_nic_priv *priv = netdev_priv(ndev);
1458 unsigned long flags;
1459 int i;
1460
1461 local_irq_save(flags);
1462 for (i = 0; i < priv->ae_handle->q_num * 2; i++)
1463 napi_schedule(&priv->ring_data[i].napi);
1464 local_irq_restore(flags);
1465}
1466#endif
1467
1468static netdev_tx_t hns_nic_net_xmit(struct sk_buff *skb,
1469 struct net_device *ndev)
1470{
1471 struct hns_nic_priv *priv = netdev_priv(ndev);
1472 int ret;
1473
1474 assert(skb->queue_mapping < ndev->ae_handle->q_num);
1475 ret = hns_nic_net_xmit_hw(ndev, skb,
1476 &tx_ring_data(priv, skb->queue_mapping));
1477 if (ret == NETDEV_TX_OK) {
860e9538 1478 netif_trans_update(ndev);
b5996f11 1479 ndev->stats.tx_bytes += skb->len;
1480 ndev->stats.tx_packets++;
1481 }
1482 return (netdev_tx_t)ret;
1483}
1484
b29bd412 1485static void hns_nic_drop_rx_fetch(struct hns_nic_ring_data *ring_data,
1486 struct sk_buff *skb)
1487{
1488 dev_kfree_skb_any(skb);
1489}
1490
1491#define HNS_LB_TX_RING 0
1492static struct sk_buff *hns_assemble_skb(struct net_device *ndev)
1493{
1494 struct sk_buff *skb;
1495 struct ethhdr *ethhdr;
1496 int frame_len;
1497
1498 /* allocate test skb */
1499 skb = alloc_skb(64, GFP_KERNEL);
1500 if (!skb)
1501 return NULL;
1502
1503 skb_put(skb, 64);
1504 skb->dev = ndev;
1505 memset(skb->data, 0xFF, skb->len);
1506
1507 /* must be tcp/ip package */
1508 ethhdr = (struct ethhdr *)skb->data;
1509 ethhdr->h_proto = htons(ETH_P_IP);
1510
1511 frame_len = skb->len & (~1ul);
1512 memset(&skb->data[frame_len / 2], 0xAA,
1513 frame_len / 2 - 1);
1514
1515 skb->queue_mapping = HNS_LB_TX_RING;
1516
1517 return skb;
1518}
1519
1520static int hns_enable_serdes_lb(struct net_device *ndev)
1521{
1522 struct hns_nic_priv *priv = netdev_priv(ndev);
1523 struct hnae_handle *h = priv->ae_handle;
1524 struct hnae_ae_ops *ops = h->dev->ops;
1525 int speed, duplex;
1526 int ret;
1527
1528 ret = ops->set_loopback(h, MAC_INTERNALLOOP_SERDES, 1);
1529 if (ret)
1530 return ret;
1531
1532 ret = ops->start ? ops->start(h) : 0;
1533 if (ret)
1534 return ret;
1535
1536 /* link adjust duplex*/
1537 if (h->phy_if != PHY_INTERFACE_MODE_XGMII)
1538 speed = 1000;
1539 else
1540 speed = 10000;
1541 duplex = 1;
1542
1543 ops->adjust_link(h, speed, duplex);
1544
1545 /* wait h/w ready */
1546 mdelay(300);
1547
1548 return 0;
1549}
1550
1551static void hns_disable_serdes_lb(struct net_device *ndev)
1552{
1553 struct hns_nic_priv *priv = netdev_priv(ndev);
1554 struct hnae_handle *h = priv->ae_handle;
1555 struct hnae_ae_ops *ops = h->dev->ops;
1556
1557 ops->stop(h);
1558 ops->set_loopback(h, MAC_INTERNALLOOP_SERDES, 0);
1559}
1560
1561/**
1562 *hns_nic_clear_all_rx_fetch - clear the chip fetched descriptions. The
1563 *function as follows:
1564 * 1. if one rx ring has found the page_offset is not equal 0 between head
1565 * and tail, it means that the chip fetched the wrong descs for the ring
1566 * which buffer size is 4096.
1567 * 2. we set the chip serdes loopback and set rss indirection to the ring.
1568 * 3. construct 64-bytes ip broadcast packages, wait the associated rx ring
1569 * recieving all packages and it will fetch new descriptions.
1570 * 4. recover to the original state.
1571 *
1572 *@ndev: net device
1573 */
1574static int hns_nic_clear_all_rx_fetch(struct net_device *ndev)
1575{
1576 struct hns_nic_priv *priv = netdev_priv(ndev);
1577 struct hnae_handle *h = priv->ae_handle;
1578 struct hnae_ae_ops *ops = h->dev->ops;
1579 struct hns_nic_ring_data *rd;
1580 struct hnae_ring *ring;
1581 struct sk_buff *skb;
1582 u32 *org_indir;
1583 u32 *cur_indir;
1584 int indir_size;
1585 int head, tail;
1586 int fetch_num;
1587 int i, j;
1588 bool found;
1589 int retry_times;
1590 int ret = 0;
1591
1592 /* alloc indir memory */
1593 indir_size = ops->get_rss_indir_size(h) * sizeof(*org_indir);
1594 org_indir = kzalloc(indir_size, GFP_KERNEL);
1595 if (!org_indir)
1596 return -ENOMEM;
1597
1598 /* store the orginal indirection */
1599 ops->get_rss(h, org_indir, NULL, NULL);
1600
1601 cur_indir = kzalloc(indir_size, GFP_KERNEL);
1602 if (!cur_indir) {
1603 ret = -ENOMEM;
1604 goto cur_indir_alloc_err;
1605 }
1606
1607 /* set loopback */
1608 if (hns_enable_serdes_lb(ndev)) {
1609 ret = -EINVAL;
1610 goto enable_serdes_lb_err;
1611 }
1612
1613 /* foreach every rx ring to clear fetch desc */
1614 for (i = 0; i < h->q_num; i++) {
1615 ring = &h->qs[i]->rx_ring;
1616 head = readl_relaxed(ring->io_base + RCB_REG_HEAD);
1617 tail = readl_relaxed(ring->io_base + RCB_REG_TAIL);
1618 found = false;
1619 fetch_num = ring_dist(ring, head, tail);
1620
1621 while (head != tail) {
1622 if (ring->desc_cb[head].page_offset != 0) {
1623 found = true;
1624 break;
1625 }
1626
1627 head++;
1628 if (head == ring->desc_num)
1629 head = 0;
1630 }
1631
1632 if (found) {
1633 for (j = 0; j < indir_size / sizeof(*org_indir); j++)
1634 cur_indir[j] = i;
1635 ops->set_rss(h, cur_indir, NULL, 0);
1636
1637 for (j = 0; j < fetch_num; j++) {
1638 /* alloc one skb and init */
1639 skb = hns_assemble_skb(ndev);
1640 if (!skb)
1641 goto out;
1642 rd = &tx_ring_data(priv, skb->queue_mapping);
1643 hns_nic_net_xmit_hw(ndev, skb, rd);
1644
1645 retry_times = 0;
1646 while (retry_times++ < 10) {
1647 mdelay(10);
1648 /* clean rx */
1649 rd = &rx_ring_data(priv, i);
1650 if (rd->poll_one(rd, fetch_num,
1651 hns_nic_drop_rx_fetch))
1652 break;
1653 }
1654
1655 retry_times = 0;
1656 while (retry_times++ < 10) {
1657 mdelay(10);
1658 /* clean tx ring 0 send package */
1659 rd = &tx_ring_data(priv,
1660 HNS_LB_TX_RING);
1661 if (rd->poll_one(rd, fetch_num, NULL))
1662 break;
1663 }
1664 }
1665 }
1666 }
1667
1668out:
1669 /* restore everything */
1670 ops->set_rss(h, org_indir, NULL, 0);
1671 hns_disable_serdes_lb(ndev);
1672enable_serdes_lb_err:
1673 kfree(cur_indir);
1674cur_indir_alloc_err:
1675 kfree(org_indir);
1676
1677 return ret;
1678}
1679
b5996f11 1680static int hns_nic_change_mtu(struct net_device *ndev, int new_mtu)
1681{
1682 struct hns_nic_priv *priv = netdev_priv(ndev);
1683 struct hnae_handle *h = priv->ae_handle;
b29bd412 1684 bool if_running = netif_running(ndev);
b5996f11 1685 int ret;
1686
b29bd412 1687 /* MTU < 68 is an error and causes problems on some kernels */
1688 if (new_mtu < 68)
1689 return -EINVAL;
1690
1691 /* MTU no change */
1692 if (new_mtu == ndev->mtu)
1693 return 0;
1694
b5996f11 1695 if (!h->dev->ops->set_mtu)
1696 return -ENOTSUPP;
1697
b29bd412 1698 if (if_running) {
b5996f11 1699 (void)hns_nic_net_stop(ndev);
1700 msleep(100);
b29bd412 1701 }
b5996f11 1702
b29bd412 1703 if (priv->enet_ver != AE_VERSION_1 &&
1704 ndev->mtu <= BD_SIZE_2048_MAX_MTU &&
1705 new_mtu > BD_SIZE_2048_MAX_MTU) {
1706 /* update desc */
1707 hnae_reinit_all_ring_desc(h);
b5996f11 1708
b29bd412 1709 /* clear the package which the chip has fetched */
1710 ret = hns_nic_clear_all_rx_fetch(ndev);
1711
1712 /* the page offset must be consist with desc */
1713 hnae_reinit_all_ring_page_off(h);
1714
1715 if (ret) {
1716 netdev_err(ndev, "clear the fetched desc fail\n");
1717 goto out;
1718 }
1719 }
1720
1721 ret = h->dev->ops->set_mtu(h, new_mtu);
1722 if (ret) {
1723 netdev_err(ndev, "set mtu fail, return value %d\n",
1724 ret);
1725 goto out;
b5996f11 1726 }
1727
b29bd412 1728 /* finally, set new mtu to netdevice */
1729 ndev->mtu = new_mtu;
1730
1731out:
1732 if (if_running) {
1733 if (hns_nic_net_open(ndev)) {
1734 netdev_err(ndev, "hns net open fail\n");
1735 ret = -EINVAL;
1736 }
1737 }
b5996f11 1738
1739 return ret;
1740}
1741
38f616da
S		 1742static int hns_nic_set_features(struct net_device *netdev,
1743 netdev_features_t features)
1744{
1745 struct hns_nic_priv *priv = netdev_priv(netdev);
38f616da
S		 1746
1747 switch (priv->enet_ver) {
1748 case AE_VERSION_1:
1749 if (features & (NETIF_F_TSO | NETIF_F_TSO6))
1750 netdev_info(netdev, "enet v1 do not support tso!\n");
1751 break;
1752 default:
1753 if (features & (NETIF_F_TSO | NETIF_F_TSO6)) {
1754 priv->ops.fill_desc = fill_tso_desc;
1755 priv->ops.maybe_stop_tx = hns_nic_maybe_stop_tso;
1756 /* The chip only support 7*4096 */
1757 netif_set_gso_max_size(netdev, 7 * 4096);
38f616da
S		 1758 } else {
1759 priv->ops.fill_desc = fill_v2_desc;
1760 priv->ops.maybe_stop_tx = hns_nic_maybe_stop_tx;
38f616da
S		 1761 }
1762 break;
1763 }
1764 netdev->features = features;
1765 return 0;
1766}
1767
1768static netdev_features_t hns_nic_fix_features(
1769 struct net_device *netdev, netdev_features_t features)
1770{
1771 struct hns_nic_priv *priv = netdev_priv(netdev);
1772
1773 switch (priv->enet_ver) {
1774 case AE_VERSION_1:
1775 features &= ~(NETIF_F_TSO | NETIF_F_TSO6 |
1776 NETIF_F_HW_VLAN_CTAG_FILTER);
1777 break;
1778 default:
1779 break;
1780 }
1781 return features;
1782}
1783
66355f52
KY		 1784static int hns_nic_uc_sync(struct net_device *netdev, const unsigned char *addr)
1785{
1786 struct hns_nic_priv *priv = netdev_priv(netdev);
1787 struct hnae_handle *h = priv->ae_handle;
1788
1789 if (h->dev->ops->add_uc_addr)
1790 return h->dev->ops->add_uc_addr(h, addr);
1791
1792 return 0;
1793}
1794
1795static int hns_nic_uc_unsync(struct net_device *netdev,
1796 const unsigned char *addr)
1797{
1798 struct hns_nic_priv *priv = netdev_priv(netdev);
1799 struct hnae_handle *h = priv->ae_handle;
1800
1801 if (h->dev->ops->rm_uc_addr)
1802 return h->dev->ops->rm_uc_addr(h, addr);
1803
1804 return 0;
1805}
1806
b5996f11 1807/**
1808 * nic_set_multicast_list - set mutl mac address
1809 * @netdev: net device
1810 * @p: mac address
1811 *
1812 * return void
1813 */
1814void hns_set_multicast_list(struct net_device *ndev)
1815{
1816 struct hns_nic_priv *priv = netdev_priv(ndev);
1817 struct hnae_handle *h = priv->ae_handle;
1818 struct netdev_hw_addr *ha = NULL;
1819
1820 if (!h) {
1821 netdev_err(ndev, "hnae handle is null\n");
1822 return;
1823 }
1824
ec2cafe6
KY		 1825 if (h->dev->ops->clr_mc_addr)
1826 if (h->dev->ops->clr_mc_addr(h))
1827 netdev_err(ndev, "clear multicast address fail\n");
1828
b5996f11 1829 if (h->dev->ops->set_mc_addr) {
1830 netdev_for_each_mc_addr(ha, ndev)
1831 if (h->dev->ops->set_mc_addr(h, ha->addr))
1832 netdev_err(ndev, "set multicast fail\n");
1833 }
1834}
1835
4568637f 1836void hns_nic_set_rx_mode(struct net_device *ndev)
1837{
1838 struct hns_nic_priv *priv = netdev_priv(ndev);
1839 struct hnae_handle *h = priv->ae_handle;
1840
1841 if (h->dev->ops->set_promisc_mode) {
1842 if (ndev->flags & IFF_PROMISC)
1843 h->dev->ops->set_promisc_mode(h, 1);
1844 else
1845 h->dev->ops->set_promisc_mode(h, 0);
1846 }
1847
1848 hns_set_multicast_list(ndev);
66355f52
KY		 1849
1850 if (__dev_uc_sync(ndev, hns_nic_uc_sync, hns_nic_uc_unsync))
1851 netdev_err(ndev, "sync uc address fail\n");
4568637f 1852}
1853
bc1f4470 1854static void hns_nic_get_stats64(struct net_device *ndev,
1855 struct rtnl_link_stats64 *stats)
b5996f11 1856{
1857 int idx = 0;
1858 u64 tx_bytes = 0;
1859 u64 rx_bytes = 0;
1860 u64 tx_pkts = 0;
1861 u64 rx_pkts = 0;
1862 struct hns_nic_priv *priv = netdev_priv(ndev);
1863 struct hnae_handle *h = priv->ae_handle;
1864
1865 for (idx = 0; idx < h->q_num; idx++) {
1866 tx_bytes += h->qs[idx]->tx_ring.stats.tx_bytes;
1867 tx_pkts += h->qs[idx]->tx_ring.stats.tx_pkts;
1868 rx_bytes += h->qs[idx]->rx_ring.stats.rx_bytes;
1869 rx_pkts += h->qs[idx]->rx_ring.stats.rx_pkts;
1870 }
1871
1872 stats->tx_bytes = tx_bytes;
1873 stats->tx_packets = tx_pkts;
1874 stats->rx_bytes = rx_bytes;
1875 stats->rx_packets = rx_pkts;
1876
1877 stats->rx_errors = ndev->stats.rx_errors;
1878 stats->multicast = ndev->stats.multicast;
1879 stats->rx_length_errors = ndev->stats.rx_length_errors;
1880 stats->rx_crc_errors = ndev->stats.rx_crc_errors;
1881 stats->rx_missed_errors = ndev->stats.rx_missed_errors;
1882
1883 stats->tx_errors = ndev->stats.tx_errors;
1884 stats->rx_dropped = ndev->stats.rx_dropped;
1885 stats->tx_dropped = ndev->stats.tx_dropped;
1886 stats->collisions = ndev->stats.collisions;
1887 stats->rx_over_errors = ndev->stats.rx_over_errors;
1888 stats->rx_frame_errors = ndev->stats.rx_frame_errors;
1889 stats->rx_fifo_errors = ndev->stats.rx_fifo_errors;
1890 stats->tx_aborted_errors = ndev->stats.tx_aborted_errors;
1891 stats->tx_carrier_errors = ndev->stats.tx_carrier_errors;
1892 stats->tx_fifo_errors = ndev->stats.tx_fifo_errors;
1893 stats->tx_heartbeat_errors = ndev->stats.tx_heartbeat_errors;
1894 stats->tx_window_errors = ndev->stats.tx_window_errors;
1895 stats->rx_compressed = ndev->stats.rx_compressed;
1896 stats->tx_compressed = ndev->stats.tx_compressed;
b5996f11 1897}
1898
2162a4a1
DH		 1899static u16
1900hns_nic_select_queue(struct net_device *ndev, struct sk_buff *skb,
1901 void *accel_priv, select_queue_fallback_t fallback)
1902{
1903 struct ethhdr *eth_hdr = (struct ethhdr *)skb->data;
1904 struct hns_nic_priv *priv = netdev_priv(ndev);
1905
1906 /* fix hardware broadcast/multicast packets queue loopback */
1907 if (!AE_IS_VER1(priv->enet_ver) &&
1908 is_multicast_ether_addr(eth_hdr->h_dest))
1909 return 0;
1910 else
1911 return fallback(ndev, skb);
1912}
1913
b5996f11 1914static const struct net_device_ops hns_nic_netdev_ops = {
1915 .ndo_open = hns_nic_net_open,
1916 .ndo_stop = hns_nic_net_stop,
1917 .ndo_start_xmit = hns_nic_net_xmit,
1918 .ndo_tx_timeout = hns_nic_net_timeout,
1919 .ndo_set_mac_address = hns_nic_net_set_mac_address,
1920 .ndo_change_mtu = hns_nic_change_mtu,
1921 .ndo_do_ioctl = hns_nic_do_ioctl,
38f616da
S		 1922 .ndo_set_features = hns_nic_set_features,
1923 .ndo_fix_features = hns_nic_fix_features,
b5996f11 1924 .ndo_get_stats64 = hns_nic_get_stats64,
1925#ifdef CONFIG_NET_POLL_CONTROLLER
1926 .ndo_poll_controller = hns_nic_poll_controller,
1927#endif
4568637f 1928 .ndo_set_rx_mode = hns_nic_set_rx_mode,
2162a4a1 1929 .ndo_select_queue = hns_nic_select_queue,
b5996f11 1930};
1931
1932static void hns_nic_update_link_status(struct net_device *netdev)
1933{
1934 struct hns_nic_priv *priv = netdev_priv(netdev);
1935
1936 struct hnae_handle *h = priv->ae_handle;
b5996f11 1937
bb7189dc
QX		 1938 if (h->phy_dev) {
1939 if (h->phy_if != PHY_INTERFACE_MODE_XGMII)
1940 return;
b5996f11 1941
bb7189dc 1942 (void)genphy_read_status(h->phy_dev);
b5996f11 1943 }
bb7189dc 1944 hns_nic_adjust_link(netdev);
b5996f11 1945}
1946
1947/* for dumping key regs*/
1948static void hns_nic_dump(struct hns_nic_priv *priv)
1949{
1950 struct hnae_handle *h = priv->ae_handle;
1951 struct hnae_ae_ops *ops = h->dev->ops;
1952 u32 *data, reg_num, i;
1953
1954 if (ops->get_regs_len && ops->get_regs) {
1955 reg_num = ops->get_regs_len(priv->ae_handle);
1956 reg_num = (reg_num + 3ul) & ~3ul;
1957 data = kcalloc(reg_num, sizeof(u32), GFP_KERNEL);
1958 if (data) {
1959 ops->get_regs(priv->ae_handle, data);
1960 for (i = 0; i < reg_num; i += 4)
1961 pr_info("0x%08x: 0x%08x 0x%08x 0x%08x 0x%08x\n",
1962 i, data[i], data[i + 1],
1963 data[i + 2], data[i + 3]);
1964 kfree(data);
1965 }
1966 }
1967
1968 for (i = 0; i < h->q_num; i++) {
1969 pr_info("tx_queue%d_next_to_clean:%d\n",
1970 i, h->qs[i]->tx_ring.next_to_clean);
1971 pr_info("tx_queue%d_next_to_use:%d\n",
1972 i, h->qs[i]->tx_ring.next_to_use);
1973 pr_info("rx_queue%d_next_to_clean:%d\n",
1974 i, h->qs[i]->rx_ring.next_to_clean);
1975 pr_info("rx_queue%d_next_to_use:%d\n",
1976 i, h->qs[i]->rx_ring.next_to_use);
1977 }
1978}
1979
f7211729 1980/* for resetting subtask */
b5996f11 1981static void hns_nic_reset_subtask(struct hns_nic_priv *priv)
1982{
1983 enum hnae_port_type type = priv->ae_handle->port_type;
1984
1985 if (!test_bit(NIC_STATE2_RESET_REQUESTED, &priv->state))
1986 return;
1987 clear_bit(NIC_STATE2_RESET_REQUESTED, &priv->state);
1988
1989 /* If we're already down, removing or resetting, just bail */
1990 if (test_bit(NIC_STATE_DOWN, &priv->state) ||
1991 test_bit(NIC_STATE_REMOVING, &priv->state) ||
1992 test_bit(NIC_STATE_RESETTING, &priv->state))
1993 return;
1994
1995 hns_nic_dump(priv);
13ac695e
S		 1996 netdev_info(priv->netdev, "try to reset %s port!\n",
1997 (type == HNAE_PORT_DEBUG ? "debug" : "service"));
b5996f11 1998
1999 rtnl_lock();
90a505b9 2000 /* put off any impending NetWatchDogTimeout */
860e9538 2001 netif_trans_update(priv->netdev);
90a505b9 2002
13ac695e 2003 if (type == HNAE_PORT_DEBUG) {
b5996f11 2004 hns_nic_net_reinit(priv->netdev);
13ac695e
S		 2005 } else {
2006 netif_carrier_off(priv->netdev);
2007 netif_tx_disable(priv->netdev);
2008 }
b5996f11 2009 rtnl_unlock();
2010}
2011
2012/* for doing service complete*/
2013static void hns_nic_service_event_complete(struct hns_nic_priv *priv)
2014{
13ac695e 2015 WARN_ON(!test_bit(NIC_STATE_SERVICE_SCHED, &priv->state));
b4957ab0 2016 /* make sure to commit the things */
b5996f11 2017 smp_mb__before_atomic();
2018 clear_bit(NIC_STATE_SERVICE_SCHED, &priv->state);
2019}
2020
2021static void hns_nic_service_task(struct work_struct *work)
2022{
2023 struct hns_nic_priv *priv
2024 = container_of(work, struct hns_nic_priv, service_task);
2025 struct hnae_handle *h = priv->ae_handle;
2026
2027 hns_nic_update_link_status(priv->netdev);
2028 h->dev->ops->update_led_status(h);
2029 hns_nic_update_stats(priv->netdev);
2030
2031 hns_nic_reset_subtask(priv);
2032 hns_nic_service_event_complete(priv);
2033}
2034
2035static void hns_nic_task_schedule(struct hns_nic_priv *priv)
2036{
2037 if (!test_bit(NIC_STATE_DOWN, &priv->state) &&
2038 !test_bit(NIC_STATE_REMOVING, &priv->state) &&
2039 !test_and_set_bit(NIC_STATE_SERVICE_SCHED, &priv->state))
2040 (void)schedule_work(&priv->service_task);
2041}
2042
2043static void hns_nic_service_timer(unsigned long data)
2044{
2045 struct hns_nic_priv *priv = (struct hns_nic_priv *)data;
2046
2047 (void)mod_timer(&priv->service_timer, jiffies + SERVICE_TIMER_HZ);
2048
2049 hns_nic_task_schedule(priv);
2050}
2051
2052/**
2053 * hns_tx_timeout_reset - initiate reset due to Tx timeout
2054 * @priv: driver private struct
2055 **/
2056static void hns_tx_timeout_reset(struct hns_nic_priv *priv)
2057{
2058 /* Do the reset outside of interrupt context */
2059 if (!test_bit(NIC_STATE_DOWN, &priv->state)) {
2060 set_bit(NIC_STATE2_RESET_REQUESTED, &priv->state);
2061 netdev_warn(priv->netdev,
2062 "initiating reset due to tx timeout(%llu,0x%lx)\n",
2063 priv->tx_timeout_count, priv->state);
2064 priv->tx_timeout_count++;
2065 hns_nic_task_schedule(priv);
2066 }
2067}
2068
2069static int hns_nic_init_ring_data(struct hns_nic_priv *priv)
2070{
2071 struct hnae_handle *h = priv->ae_handle;
2072 struct hns_nic_ring_data *rd;
4b34aa41 2073 bool is_ver1 = AE_IS_VER1(priv->enet_ver);
b5996f11 2074 int i;
2075
2076 if (h->q_num > NIC_MAX_Q_PER_VF) {
2077 netdev_err(priv->netdev, "too much queue (%d)\n", h->q_num);
2078 return -EINVAL;
2079 }
2080
2081 priv->ring_data = kzalloc(h->q_num * sizeof(*priv->ring_data) * 2,
2082 GFP_KERNEL);
2083 if (!priv->ring_data)
2084 return -ENOMEM;
2085
2086 for (i = 0; i < h->q_num; i++) {
2087 rd = &priv->ring_data[i];
2088 rd->queue_index = i;
2089 rd->ring = &h->qs[i]->tx_ring;
2090 rd->poll_one = hns_nic_tx_poll_one;
cee5add4
DH		 2091 rd->fini_process = is_ver1 ? hns_nic_tx_fini_pro :
2092 hns_nic_tx_fini_pro_v2;
b5996f11 2093
2094 netif_napi_add(priv->netdev, &rd->napi,
2095 hns_nic_common_poll, NIC_TX_CLEAN_MAX_NUM);
2096 rd->ring->irq_init_flag = RCB_IRQ_NOT_INITED;
2097 }
2098 for (i = h->q_num; i < h->q_num * 2; i++) {
2099 rd = &priv->ring_data[i];
2100 rd->queue_index = i - h->q_num;
2101 rd->ring = &h->qs[i - h->q_num]->rx_ring;
2102 rd->poll_one = hns_nic_rx_poll_one;
2103 rd->ex_process = hns_nic_rx_up_pro;
cee5add4
DH		 2104 rd->fini_process = is_ver1 ? hns_nic_rx_fini_pro :
2105 hns_nic_rx_fini_pro_v2;
b5996f11 2106
2107 netif_napi_add(priv->netdev, &rd->napi,
2108 hns_nic_common_poll, NIC_RX_CLEAN_MAX_NUM);
2109 rd->ring->irq_init_flag = RCB_IRQ_NOT_INITED;
2110 }
2111
2112 return 0;
2113}
2114
2115static void hns_nic_uninit_ring_data(struct hns_nic_priv *priv)
2116{
2117 struct hnae_handle *h = priv->ae_handle;
2118 int i;
2119
2120 for (i = 0; i < h->q_num * 2; i++) {
2121 netif_napi_del(&priv->ring_data[i].napi);
2122 if (priv->ring_data[i].ring->irq_init_flag == RCB_IRQ_INITED) {
13ac695e
S		 2123 (void)irq_set_affinity_hint(
2124 priv->ring_data[i].ring->irq,
2125 NULL);
b5996f11 2126 free_irq(priv->ring_data[i].ring->irq,
2127 &priv->ring_data[i]);
2128 }
2129
2130 priv->ring_data[i].ring->irq_init_flag = RCB_IRQ_NOT_INITED;
2131 }
2132 kfree(priv->ring_data);
2133}
2134
13ac695e
S		 2135static void hns_nic_set_priv_ops(struct net_device *netdev)
2136{
2137 struct hns_nic_priv *priv = netdev_priv(netdev);
64353af6 2138 struct hnae_handle *h = priv->ae_handle;
13ac695e
S		 2139
2140 if (AE_IS_VER1(priv->enet_ver)) {
2141 priv->ops.fill_desc = fill_desc;
2142 priv->ops.get_rxd_bnum = get_rx_desc_bnum;
2143 priv->ops.maybe_stop_tx = hns_nic_maybe_stop_tx;
2144 } else {
2145 priv->ops.get_rxd_bnum = get_v2rx_desc_bnum;
64353af6
S		 2146 if ((netdev->features & NETIF_F_TSO) ||
2147 (netdev->features & NETIF_F_TSO6)) {
2148 priv->ops.fill_desc = fill_tso_desc;
2149 priv->ops.maybe_stop_tx = hns_nic_maybe_stop_tso;
2150 /* This chip only support 7*4096 */
2151 netif_set_gso_max_size(netdev, 7 * 4096);
64353af6
S		 2152 } else {
2153 priv->ops.fill_desc = fill_v2_desc;
2154 priv->ops.maybe_stop_tx = hns_nic_maybe_stop_tx;
2155 }
6fe27464
DH		 2156 /* enable tso when init
2157 * control tso on/off through TSE bit in bd
2158 */
2159 h->dev->ops->set_tso_stats(h, 1);
13ac695e
S		 2160 }
2161}
2162
b5996f11 2163static int hns_nic_try_get_ae(struct net_device *ndev)
2164{
2165 struct hns_nic_priv *priv = netdev_priv(ndev);
2166 struct hnae_handle *h;
2167 int ret;
2168
2169 h = hnae_get_handle(&priv->netdev->dev,
7b2acae6 2170 priv->fwnode, priv->port_id, NULL);
b5996f11 2171 if (IS_ERR_OR_NULL(h)) {
daa8cfd9 2172 ret = -ENODEV;
b5996f11 2173 dev_dbg(priv->dev, "has not handle, register notifier!\n");
2174 goto out;
2175 }
2176 priv->ae_handle = h;
2177
2178 ret = hns_nic_init_phy(ndev, h);
2179 if (ret) {
2180 dev_err(priv->dev, "probe phy device fail!\n");
2181 goto out_init_phy;
2182 }
2183
2184 ret = hns_nic_init_ring_data(priv);
2185 if (ret) {
2186 ret = -ENOMEM;
2187 goto out_init_ring_data;
2188 }
2189
13ac695e
S		 2190 hns_nic_set_priv_ops(ndev);
2191
b5996f11 2192 ret = register_netdev(ndev);
2193 if (ret) {
2194 dev_err(priv->dev, "probe register netdev fail!\n");
2195 goto out_reg_ndev_fail;
2196 }
2197 return 0;
2198
2199out_reg_ndev_fail:
2200 hns_nic_uninit_ring_data(priv);
2201 priv->ring_data = NULL;
2202out_init_phy:
2203out_init_ring_data:
2204 hnae_put_handle(priv->ae_handle);
2205 priv->ae_handle = NULL;
2206out:
2207 return ret;
2208}
2209
2210static int hns_nic_notifier_action(struct notifier_block *nb,
2211 unsigned long action, void *data)
2212{
2213 struct hns_nic_priv *priv =
2214 container_of(nb, struct hns_nic_priv, notifier_block);
2215
2216 assert(action == HNAE_AE_REGISTER);
2217
2218 if (!hns_nic_try_get_ae(priv->netdev)) {
2219 hnae_unregister_notifier(&priv->notifier_block);
2220 priv->notifier_block.notifier_call = NULL;
2221 }
2222 return 0;
2223}
2224
2225static int hns_nic_dev_probe(struct platform_device *pdev)
2226{
2227 struct device *dev = &pdev->dev;
2228 struct net_device *ndev;
2229 struct hns_nic_priv *priv;
406adee9 2230 u32 port_id;
b5996f11 2231 int ret;
2232
2233 ndev = alloc_etherdev_mq(sizeof(struct hns_nic_priv), NIC_MAX_Q_PER_VF);
2234 if (!ndev)
2235 return -ENOMEM;
2236
2237 platform_set_drvdata(pdev, ndev);
2238
2239 priv = netdev_priv(ndev);
2240 priv->dev = dev;
2241 priv->netdev = ndev;
2242
63434888
KY		 2243 if (dev_of_node(dev)) {
2244 struct device_node *ae_node;
b5996f11 2245
63434888
KY		 2246 if (of_device_is_compatible(dev->of_node,
2247 "hisilicon,hns-nic-v1"))
2248 priv->enet_ver = AE_VERSION_1;
2249 else
2250 priv->enet_ver = AE_VERSION_2;
2251
2252 ae_node = of_parse_phandle(dev->of_node, "ae-handle", 0);
2253 if (IS_ERR_OR_NULL(ae_node)) {
2254 ret = PTR_ERR(ae_node);
2255 dev_err(dev, "not find ae-handle\n");
2256 goto out_read_prop_fail;
2257 }
2258 priv->fwnode = &ae_node->fwnode;
2259 } else if (is_acpi_node(dev->fwnode)) {
2260 struct acpi_reference_args args;
2261
2262 if (acpi_dev_found(hns_enet_acpi_match[0].id))
2263 priv->enet_ver = AE_VERSION_1;
2264 else if (acpi_dev_found(hns_enet_acpi_match[1].id))
2265 priv->enet_ver = AE_VERSION_2;
2266 else
2267 return -ENXIO;
2268
2269 /* try to find port-idx-in-ae first */
2270 ret = acpi_node_get_property_reference(dev->fwnode,
2271 "ae-handle", 0, &args);
2272 if (ret) {
2273 dev_err(dev, "not find ae-handle\n");
2274 goto out_read_prop_fail;
2275 }
2276 priv->fwnode = acpi_fwnode_handle(args.adev);
2277 } else {
2278 dev_err(dev, "cannot read cfg data from OF or acpi\n");
2279 return -ENXIO;
48189d6a 2280 }
7b2acae6 2281
6162928c 2282 ret = device_property_read_u32(dev, "port-idx-in-ae", &port_id);
406adee9
YZZ		 2283 if (ret) {
2284 /* only for old code compatible */
6162928c 2285 ret = device_property_read_u32(dev, "port-id", &port_id);
406adee9
YZZ		 2286 if (ret)
2287 goto out_read_prop_fail;
2288 /* for old dts, we need to caculate the port offset */
2289 port_id = port_id < HNS_SRV_OFFSET ? port_id + HNS_DEBUG_OFFSET
2290 : port_id - HNS_SRV_OFFSET;
2291 }
2292 priv->port_id = port_id;
b5996f11 2293
2294 hns_init_mac_addr(ndev);
2295
2296 ndev->watchdog_timeo = HNS_NIC_TX_TIMEOUT;
2297 ndev->priv_flags |= IFF_UNICAST_FLT;
2298 ndev->netdev_ops = &hns_nic_netdev_ops;
2299 hns_ethtool_set_ops(ndev);
13ac695e 2300
b5996f11 2301 ndev->features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
2302 NETIF_F_RXCSUM | NETIF_F_SG | NETIF_F_GSO |
2303 NETIF_F_GRO;
2304 ndev->vlan_features |=
2305 NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM | NETIF_F_RXCSUM;
2306 ndev->vlan_features |= NETIF_F_SG | NETIF_F_GSO | NETIF_F_GRO;
2307
44770e11
JW		 2308 /* MTU range: 68 - 9578 (v1) or 9706 (v2) */
2309 ndev->min_mtu = MAC_MIN_MTU;
13ac695e
S		 2310 switch (priv->enet_ver) {
2311 case AE_VERSION_2:
64353af6 2312 ndev->features |= NETIF_F_TSO | NETIF_F_TSO6;
13ac695e
S		 2313 ndev->hw_features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
2314 NETIF_F_RXCSUM | NETIF_F_SG | NETIF_F_GSO |
64353af6 2315 NETIF_F_GRO | NETIF_F_TSO | NETIF_F_TSO6;
44770e11
JW		 2316 ndev->max_mtu = MAC_MAX_MTU_V2 -
2317 (ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN);
13ac695e
S		 2318 break;
2319 default:
44770e11
JW		 2320 ndev->max_mtu = MAC_MAX_MTU -
2321 (ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN);
13ac695e
S		 2322 break;
2323 }
2324
b5996f11 2325 SET_NETDEV_DEV(ndev, dev);
2326
2327 if (!dma_set_mask_and_coherent(dev, DMA_BIT_MASK(64)))
2328 dev_dbg(dev, "set mask to 64bit\n");
2329 else
39c94417 2330 dev_err(dev, "set mask to 64bit fail!\n");
b5996f11 2331
2332 /* carrier off reporting is important to ethtool even BEFORE open */
2333 netif_carrier_off(ndev);
2334
2335 setup_timer(&priv->service_timer, hns_nic_service_timer,
2336 (unsigned long)priv);
2337 INIT_WORK(&priv->service_task, hns_nic_service_task);
2338
2339 set_bit(NIC_STATE_SERVICE_INITED, &priv->state);
2340 clear_bit(NIC_STATE_SERVICE_SCHED, &priv->state);
2341 set_bit(NIC_STATE_DOWN, &priv->state);
2342
2343 if (hns_nic_try_get_ae(priv->netdev)) {
2344 priv->notifier_block.notifier_call = hns_nic_notifier_action;
2345 ret = hnae_register_notifier(&priv->notifier_block);
2346 if (ret) {
2347 dev_err(dev, "register notifier fail!\n");
2348 goto out_notify_fail;
2349 }
2350 dev_dbg(dev, "has not handle, register notifier!\n");
2351 }
2352
2353 return 0;
2354
2355out_notify_fail:
2356 (void)cancel_work_sync(&priv->service_task);
48189d6a 2357out_read_prop_fail:
b5996f11 2358 free_netdev(ndev);
2359 return ret;
2360}
2361
2362static int hns_nic_dev_remove(struct platform_device *pdev)
2363{
2364 struct net_device *ndev = platform_get_drvdata(pdev);
2365 struct hns_nic_priv *priv = netdev_priv(ndev);
2366
2367 if (ndev->reg_state != NETREG_UNINITIALIZED)
2368 unregister_netdev(ndev);
2369
2370 if (priv->ring_data)
2371 hns_nic_uninit_ring_data(priv);
2372 priv->ring_data = NULL;
2373
262b38cd
PR		 2374 if (ndev->phydev)
2375 phy_disconnect(ndev->phydev);
b5996f11 2376
2377 if (!IS_ERR_OR_NULL(priv->ae_handle))
2378 hnae_put_handle(priv->ae_handle);
2379 priv->ae_handle = NULL;
2380 if (priv->notifier_block.notifier_call)
2381 hnae_unregister_notifier(&priv->notifier_block);
2382 priv->notifier_block.notifier_call = NULL;
2383
2384 set_bit(NIC_STATE_REMOVING, &priv->state);
2385 (void)cancel_work_sync(&priv->service_task);
2386
2387 free_netdev(ndev);
2388 return 0;
2389}
2390
2391static const struct of_device_id hns_enet_of_match[] = {
2392 {.compatible = "hisilicon,hns-nic-v1",},
2393 {.compatible = "hisilicon,hns-nic-v2",},
2394 {},
2395};
2396
2397MODULE_DEVICE_TABLE(of, hns_enet_of_match);
2398
2399static struct platform_driver hns_nic_dev_driver = {
2400 .driver = {
2401 .name = "hns-nic",
b5996f11 2402 .of_match_table = hns_enet_of_match,
63434888 2403 .acpi_match_table = ACPI_PTR(hns_enet_acpi_match),
b5996f11 2404 },
2405 .probe = hns_nic_dev_probe,
2406 .remove = hns_nic_dev_remove,
2407};
2408
2409module_platform_driver(hns_nic_dev_driver);
2410
2411MODULE_DESCRIPTION("HISILICON HNS Ethernet driver");
2412MODULE_AUTHOR("Hisilicon, Inc.");
2413MODULE_LICENSE("GPL");
2414MODULE_ALIAS("platform:hns-nic");
Linux 6.x block layer and io_uring tree(s)