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net:hns: Add Hip06 "TSO(TCP Segment Offload)" support HNS Driver
[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"
25
26#define NIC_MAX_Q_PER_VF 16
27#define HNS_NIC_TX_TIMEOUT (5 * HZ)
28
29#define SERVICE_TIMER_HZ (1 * HZ)
30
31#define NIC_TX_CLEAN_MAX_NUM 256
32#define NIC_RX_CLEAN_MAX_NUM 64
33
b5996f11 34#define RCB_IRQ_NOT_INITED 0
35#define RCB_IRQ_INITED 1
36
13ac695e
S		 37#define BD_MAX_SEND_SIZE 8191
38#define SKB_TMP_LEN(SKB) \
39 (((SKB)->transport_header - (SKB)->mac_header) + tcp_hdrlen(SKB))
40
41static void fill_v2_desc(struct hnae_ring *ring, void *priv,
42 int size, dma_addr_t dma, int frag_end,
43 int buf_num, enum hns_desc_type type, int mtu)
44{
45 struct hnae_desc *desc = &ring->desc[ring->next_to_use];
46 struct hnae_desc_cb *desc_cb = &ring->desc_cb[ring->next_to_use];
47 struct iphdr *iphdr;
48 struct ipv6hdr *ipv6hdr;
49 struct sk_buff *skb;
50 int skb_tmp_len;
51 __be16 protocol;
52 u8 bn_pid = 0;
53 u8 rrcfv = 0;
54 u8 ip_offset = 0;
55 u8 tvsvsn = 0;
56 u16 mss = 0;
57 u8 l4_len = 0;
58 u16 paylen = 0;
59
60 desc_cb->priv = priv;
61 desc_cb->length = size;
62 desc_cb->dma = dma;
63 desc_cb->type = type;
64
65 desc->addr = cpu_to_le64(dma);
66 desc->tx.send_size = cpu_to_le16((u16)size);
67
68 /*config bd buffer end */
69 hnae_set_bit(rrcfv, HNSV2_TXD_VLD_B, 1);
70 hnae_set_field(bn_pid, HNSV2_TXD_BUFNUM_M, 0, buf_num - 1);
71
72 if (type == DESC_TYPE_SKB) {
73 skb = (struct sk_buff *)priv;
74
75 if (skb->ip_summed == CHECKSUM_PARTIAL) {
76 skb_reset_mac_len(skb);
77 protocol = skb->protocol;
78 ip_offset = ETH_HLEN;
79
80 if (protocol == htons(ETH_P_8021Q)) {
81 ip_offset += VLAN_HLEN;
82 protocol = vlan_get_protocol(skb);
83 skb->protocol = protocol;
84 }
85
86 if (skb->protocol == htons(ETH_P_IP)) {
87 iphdr = ip_hdr(skb);
88 hnae_set_bit(rrcfv, HNSV2_TXD_L3CS_B, 1);
89 hnae_set_bit(rrcfv, HNSV2_TXD_L4CS_B, 1);
90
91 /* check for tcp/udp header */
92 if (iphdr->protocol == IPPROTO_TCP) {
93 hnae_set_bit(tvsvsn,
94 HNSV2_TXD_TSE_B, 1);
95 skb_tmp_len = SKB_TMP_LEN(skb);
96 l4_len = tcp_hdrlen(skb);
97 mss = mtu - skb_tmp_len - ETH_FCS_LEN;
98 paylen = skb->len - skb_tmp_len;
99 }
100 } else if (skb->protocol == htons(ETH_P_IPV6)) {
101 hnae_set_bit(tvsvsn, HNSV2_TXD_IPV6_B, 1);
102 ipv6hdr = ipv6_hdr(skb);
103 hnae_set_bit(rrcfv, HNSV2_TXD_L4CS_B, 1);
104
105 /* check for tcp/udp header */
106 if (ipv6hdr->nexthdr == IPPROTO_TCP) {
107 hnae_set_bit(tvsvsn,
108 HNSV2_TXD_TSE_B, 1);
109 skb_tmp_len = SKB_TMP_LEN(skb);
110 l4_len = tcp_hdrlen(skb);
111 mss = mtu - skb_tmp_len - ETH_FCS_LEN;
112 paylen = skb->len - skb_tmp_len;
113 }
114 }
115 desc->tx.ip_offset = ip_offset;
116 desc->tx.tse_vlan_snap_v6_sctp_nth = tvsvsn;
117 desc->tx.mss = cpu_to_le16(mss);
118 desc->tx.l4_len = l4_len;
119 desc->tx.paylen = cpu_to_le16(paylen);
120 }
121 }
122
123 hnae_set_bit(rrcfv, HNSV2_TXD_FE_B, frag_end);
124
125 desc->tx.bn_pid = bn_pid;
126 desc->tx.ra_ri_cs_fe_vld = rrcfv;
127
128 ring_ptr_move_fw(ring, next_to_use);
129}
130
b5996f11 131static void fill_desc(struct hnae_ring *ring, void *priv,
132 int size, dma_addr_t dma, int frag_end,
13ac695e 133 int buf_num, enum hns_desc_type type, int mtu)
b5996f11 134{
135 struct hnae_desc *desc = &ring->desc[ring->next_to_use];
136 struct hnae_desc_cb *desc_cb = &ring->desc_cb[ring->next_to_use];
137 struct sk_buff *skb;
138 __be16 protocol;
139 u32 ip_offset;
140 u32 asid_bufnum_pid = 0;
141 u32 flag_ipoffset = 0;
142
143 desc_cb->priv = priv;
144 desc_cb->length = size;
145 desc_cb->dma = dma;
146 desc_cb->type = type;
147
148 desc->addr = cpu_to_le64(dma);
149 desc->tx.send_size = cpu_to_le16((u16)size);
150
151 /*config bd buffer end */
152 flag_ipoffset |= 1 << HNS_TXD_VLD_B;
153
154 asid_bufnum_pid |= buf_num << HNS_TXD_BUFNUM_S;
155
156 if (type == DESC_TYPE_SKB) {
157 skb = (struct sk_buff *)priv;
158
159 if (skb->ip_summed == CHECKSUM_PARTIAL) {
160 protocol = skb->protocol;
161 ip_offset = ETH_HLEN;
162
163 /*if it is a SW VLAN check the next protocol*/
164 if (protocol == htons(ETH_P_8021Q)) {
165 ip_offset += VLAN_HLEN;
166 protocol = vlan_get_protocol(skb);
167 skb->protocol = protocol;
168 }
169
170 if (skb->protocol == htons(ETH_P_IP)) {
171 flag_ipoffset |= 1 << HNS_TXD_L3CS_B;
172 /* check for tcp/udp header */
173 flag_ipoffset |= 1 << HNS_TXD_L4CS_B;
174
175 } else if (skb->protocol == htons(ETH_P_IPV6)) {
176 /* ipv6 has not l3 cs, check for L4 header */
177 flag_ipoffset |= 1 << HNS_TXD_L4CS_B;
178 }
179
180 flag_ipoffset |= ip_offset << HNS_TXD_IPOFFSET_S;
181 }
182 }
183
184 flag_ipoffset |= frag_end << HNS_TXD_FE_B;
185
186 desc->tx.asid_bufnum_pid = cpu_to_le16(asid_bufnum_pid);
187 desc->tx.flag_ipoffset = cpu_to_le32(flag_ipoffset);
188
189 ring_ptr_move_fw(ring, next_to_use);
190}
191
192static void unfill_desc(struct hnae_ring *ring)
193{
194 ring_ptr_move_bw(ring, next_to_use);
195}
196
13ac695e
S		 197static int hns_nic_maybe_stop_tx(
198 struct sk_buff **out_skb, int *bnum, struct hnae_ring *ring)
b5996f11 199{
13ac695e
S		 200 struct sk_buff *skb = *out_skb;
201 struct sk_buff *new_skb = NULL;
b5996f11 202 int buf_num;
b5996f11 203
204 /* no. of segments (plus a header) */
205 buf_num = skb_shinfo(skb)->nr_frags + 1;
206
207 if (unlikely(buf_num > ring->max_desc_num_per_pkt)) {
13ac695e
S		 208 if (ring_space(ring) < 1)
209 return -EBUSY;
b5996f11 210
211 new_skb = skb_copy(skb, GFP_ATOMIC);
13ac695e
S		 212 if (!new_skb)
213 return -ENOMEM;
b5996f11 214
215 dev_kfree_skb_any(skb);
13ac695e 216 *out_skb = new_skb;
b5996f11 217 buf_num = 1;
b5996f11 218 } else if (buf_num > ring_space(ring)) {
13ac695e
S		 219 return -EBUSY;
220 }
221
222 *bnum = buf_num;
223 return 0;
224}
225
64353af6
S		 226static int hns_nic_maybe_stop_tso(
227 struct sk_buff **out_skb, int *bnum, struct hnae_ring *ring)
228{
229 int i;
230 int size;
231 int buf_num;
232 int frag_num;
233 struct sk_buff *skb = *out_skb;
234 struct sk_buff *new_skb = NULL;
235 struct skb_frag_struct *frag;
236
237 size = skb_headlen(skb);
238 buf_num = (size + BD_MAX_SEND_SIZE - 1) / BD_MAX_SEND_SIZE;
239
240 frag_num = skb_shinfo(skb)->nr_frags;
241 for (i = 0; i < frag_num; i++) {
242 frag = &skb_shinfo(skb)->frags[i];
243 size = skb_frag_size(frag);
244 buf_num += (size + BD_MAX_SEND_SIZE - 1) / BD_MAX_SEND_SIZE;
245 }
246
247 if (unlikely(buf_num > ring->max_desc_num_per_pkt)) {
248 buf_num = (skb->len + BD_MAX_SEND_SIZE - 1) / BD_MAX_SEND_SIZE;
249 if (ring_space(ring) < buf_num)
250 return -EBUSY;
251 /* manual split the send packet */
252 new_skb = skb_copy(skb, GFP_ATOMIC);
253 if (!new_skb)
254 return -ENOMEM;
255 dev_kfree_skb_any(skb);
256 *out_skb = new_skb;
257
258 } else if (ring_space(ring) < buf_num) {
259 return -EBUSY;
260 }
261
262 *bnum = buf_num;
263 return 0;
264}
265
266static void fill_tso_desc(struct hnae_ring *ring, void *priv,
267 int size, dma_addr_t dma, int frag_end,
268 int buf_num, enum hns_desc_type type, int mtu)
269{
270 int frag_buf_num;
271 int sizeoflast;
272 int k;
273
274 frag_buf_num = (size + BD_MAX_SEND_SIZE - 1) / BD_MAX_SEND_SIZE;
275 sizeoflast = size % BD_MAX_SEND_SIZE;
276 sizeoflast = sizeoflast ? sizeoflast : BD_MAX_SEND_SIZE;
277
278 /* when the frag size is bigger than hardware, split this frag */
279 for (k = 0; k < frag_buf_num; k++)
280 fill_v2_desc(ring, priv,
281 (k == frag_buf_num - 1) ?
282 sizeoflast : BD_MAX_SEND_SIZE,
283 dma + BD_MAX_SEND_SIZE * k,
284 frag_end && (k == frag_buf_num - 1) ? 1 : 0,
285 buf_num,
286 (type == DESC_TYPE_SKB && !k) ?
287 DESC_TYPE_SKB : DESC_TYPE_PAGE,
288 mtu);
289}
290
13ac695e
S		 291int hns_nic_net_xmit_hw(struct net_device *ndev,
292 struct sk_buff *skb,
293 struct hns_nic_ring_data *ring_data)
294{
295 struct hns_nic_priv *priv = netdev_priv(ndev);
296 struct device *dev = priv->dev;
297 struct hnae_ring *ring = ring_data->ring;
298 struct netdev_queue *dev_queue;
299 struct skb_frag_struct *frag;
300 int buf_num;
301 int seg_num;
302 dma_addr_t dma;
303 int size, next_to_use;
304 int i;
305
306 switch (priv->ops.maybe_stop_tx(&skb, &buf_num, ring)) {
307 case -EBUSY:
b5996f11 308 ring->stats.tx_busy++;
309 goto out_net_tx_busy;
13ac695e
S		 310 case -ENOMEM:
311 ring->stats.sw_err_cnt++;
312 netdev_err(ndev, "no memory to xmit!\n");
313 goto out_err_tx_ok;
314 default:
315 break;
b5996f11 316 }
13ac695e
S		 317
318 /* no. of segments (plus a header) */
319 seg_num = skb_shinfo(skb)->nr_frags + 1;
b5996f11 320 next_to_use = ring->next_to_use;
321
322 /* fill the first part */
323 size = skb_headlen(skb);
324 dma = dma_map_single(dev, skb->data, size, DMA_TO_DEVICE);
325 if (dma_mapping_error(dev, dma)) {
326 netdev_err(ndev, "TX head DMA map failed\n");
327 ring->stats.sw_err_cnt++;
328 goto out_err_tx_ok;
329 }
13ac695e
S		 330 priv->ops.fill_desc(ring, skb, size, dma, seg_num == 1 ? 1 : 0,
331 buf_num, DESC_TYPE_SKB, ndev->mtu);
b5996f11 332
333 /* fill the fragments */
13ac695e 334 for (i = 1; i < seg_num; i++) {
b5996f11 335 frag = &skb_shinfo(skb)->frags[i - 1];
336 size = skb_frag_size(frag);
337 dma = skb_frag_dma_map(dev, frag, 0, size, DMA_TO_DEVICE);
338 if (dma_mapping_error(dev, dma)) {
339 netdev_err(ndev, "TX frag(%d) DMA map failed\n", i);
340 ring->stats.sw_err_cnt++;
341 goto out_map_frag_fail;
342 }
13ac695e
S		 343 priv->ops.fill_desc(ring, skb_frag_page(frag), size, dma,
344 seg_num - 1 == i ? 1 : 0, buf_num,
345 DESC_TYPE_PAGE, ndev->mtu);
b5996f11 346 }
347
348 /*complete translate all packets*/
349 dev_queue = netdev_get_tx_queue(ndev, skb->queue_mapping);
350 netdev_tx_sent_queue(dev_queue, skb->len);
351
352 wmb(); /* commit all data before submit */
353 assert(skb->queue_mapping < priv->ae_handle->q_num);
354 hnae_queue_xmit(priv->ae_handle->qs[skb->queue_mapping], buf_num);
355 ring->stats.tx_pkts++;
356 ring->stats.tx_bytes += skb->len;
357
358 return NETDEV_TX_OK;
359
360out_map_frag_fail:
361
13ac695e 362 while (ring->next_to_use != next_to_use) {
b5996f11 363 unfill_desc(ring);
13ac695e
S		 364 if (ring->next_to_use != next_to_use)
365 dma_unmap_page(dev,
366 ring->desc_cb[ring->next_to_use].dma,
367 ring->desc_cb[ring->next_to_use].length,
368 DMA_TO_DEVICE);
369 else
370 dma_unmap_single(dev,
371 ring->desc_cb[next_to_use].dma,
372 ring->desc_cb[next_to_use].length,
373 DMA_TO_DEVICE);
b5996f11 374 }
375
b5996f11 376out_err_tx_ok:
377
378 dev_kfree_skb_any(skb);
379 return NETDEV_TX_OK;
380
381out_net_tx_busy:
382
383 netif_stop_subqueue(ndev, skb->queue_mapping);
384
385 /* Herbert's original patch had:
386 * smp_mb__after_netif_stop_queue();
387 * but since that doesn't exist yet, just open code it.
388 */
389 smp_mb();
390 return NETDEV_TX_BUSY;
391}
392
393/**
394 * hns_nic_get_headlen - determine size of header for RSC/LRO/GRO/FCOE
395 * @data: pointer to the start of the headers
396 * @max: total length of section to find headers in
397 *
398 * This function is meant to determine the length of headers that will
399 * be recognized by hardware for LRO, GRO, and RSC offloads. The main
400 * motivation of doing this is to only perform one pull for IPv4 TCP
401 * packets so that we can do basic things like calculating the gso_size
402 * based on the average data per packet.
403 **/
404static unsigned int hns_nic_get_headlen(unsigned char *data, u32 flag,
405 unsigned int max_size)
406{
407 unsigned char *network;
408 u8 hlen;
409
410 /* this should never happen, but better safe than sorry */
411 if (max_size < ETH_HLEN)
412 return max_size;
413
414 /* initialize network frame pointer */
415 network = data;
416
417 /* set first protocol and move network header forward */
418 network += ETH_HLEN;
419
420 /* handle any vlan tag if present */
421 if (hnae_get_field(flag, HNS_RXD_VLAN_M, HNS_RXD_VLAN_S)
422 == HNS_RX_FLAG_VLAN_PRESENT) {
423 if ((typeof(max_size))(network - data) > (max_size - VLAN_HLEN))
424 return max_size;
425
426 network += VLAN_HLEN;
427 }
428
429 /* handle L3 protocols */
430 if (hnae_get_field(flag, HNS_RXD_L3ID_M, HNS_RXD_L3ID_S)
431 == HNS_RX_FLAG_L3ID_IPV4) {
432 if ((typeof(max_size))(network - data) >
433 (max_size - sizeof(struct iphdr)))
434 return max_size;
435
436 /* access ihl as a u8 to avoid unaligned access on ia64 */
437 hlen = (network[0] & 0x0F) << 2;
438
439 /* verify hlen meets minimum size requirements */
440 if (hlen < sizeof(struct iphdr))
441 return network - data;
442
443 /* record next protocol if header is present */
444 } else if (hnae_get_field(flag, HNS_RXD_L3ID_M, HNS_RXD_L3ID_S)
445 == HNS_RX_FLAG_L3ID_IPV6) {
446 if ((typeof(max_size))(network - data) >
447 (max_size - sizeof(struct ipv6hdr)))
448 return max_size;
449
450 /* record next protocol */
451 hlen = sizeof(struct ipv6hdr);
452 } else {
453 return network - data;
454 }
455
456 /* relocate pointer to start of L4 header */
457 network += hlen;
458
459 /* finally sort out TCP/UDP */
460 if (hnae_get_field(flag, HNS_RXD_L4ID_M, HNS_RXD_L4ID_S)
461 == HNS_RX_FLAG_L4ID_TCP) {
462 if ((typeof(max_size))(network - data) >
463 (max_size - sizeof(struct tcphdr)))
464 return max_size;
465
466 /* access doff as a u8 to avoid unaligned access on ia64 */
467 hlen = (network[12] & 0xF0) >> 2;
468
469 /* verify hlen meets minimum size requirements */
470 if (hlen < sizeof(struct tcphdr))
471 return network - data;
472
473 network += hlen;
474 } else if (hnae_get_field(flag, HNS_RXD_L4ID_M, HNS_RXD_L4ID_S)
475 == HNS_RX_FLAG_L4ID_UDP) {
476 if ((typeof(max_size))(network - data) >
477 (max_size - sizeof(struct udphdr)))
478 return max_size;
479
480 network += sizeof(struct udphdr);
481 }
482
483 /* If everything has gone correctly network should be the
484 * data section of the packet and will be the end of the header.
485 * If not then it probably represents the end of the last recognized
486 * header.
487 */
488 if ((typeof(max_size))(network - data) < max_size)
489 return network - data;
490 else
491 return max_size;
492}
493
494static void
495hns_nic_reuse_page(struct hnae_desc_cb *desc_cb, int tsize, int last_offset)
496{
497 /* avoid re-using remote pages,flag default unreuse */
498 if (likely(page_to_nid(desc_cb->priv) == numa_node_id())) {
499 /* move offset up to the next cache line */
500 desc_cb->page_offset += tsize;
501
502 if (desc_cb->page_offset <= last_offset) {
503 desc_cb->reuse_flag = 1;
504 /* bump ref count on page before it is given*/
505 get_page(desc_cb->priv);
506 }
507 }
508}
509
13ac695e
S		 510static void get_v2rx_desc_bnum(u32 bnum_flag, int *out_bnum)
511{
512 *out_bnum = hnae_get_field(bnum_flag,
513 HNS_RXD_BUFNUM_M, HNS_RXD_BUFNUM_S) + 1;
514}
515
516static void get_rx_desc_bnum(u32 bnum_flag, int *out_bnum)
517{
518 *out_bnum = hnae_get_field(bnum_flag,
519 HNS_RXD_BUFNUM_M, HNS_RXD_BUFNUM_S);
520}
521
b5996f11 522static int hns_nic_poll_rx_skb(struct hns_nic_ring_data *ring_data,
523 struct sk_buff **out_skb, int *out_bnum)
524{
525 struct hnae_ring *ring = ring_data->ring;
526 struct net_device *ndev = ring_data->napi.dev;
13ac695e 527 struct hns_nic_priv *priv = netdev_priv(ndev);
b5996f11 528 struct sk_buff *skb;
529 struct hnae_desc *desc;
530 struct hnae_desc_cb *desc_cb;
531 unsigned char *va;
532 int bnum, length, size, i, truesize, last_offset;
533 int pull_len;
534 u32 bnum_flag;
535
536 last_offset = hnae_page_size(ring) - hnae_buf_size(ring);
537 desc = &ring->desc[ring->next_to_clean];
538 desc_cb = &ring->desc_cb[ring->next_to_clean];
13ac695e
S		 539
540 prefetch(desc);
541
b5996f11 542 va = (unsigned char *)desc_cb->buf + desc_cb->page_offset;
543
13ac695e
S		 544 /* prefetch first cache line of first page */
545 prefetch(va);
546#if L1_CACHE_BYTES < 128
547 prefetch(va + L1_CACHE_BYTES);
548#endif
549
550 skb = *out_skb = napi_alloc_skb(&ring_data->napi,
551 HNS_RX_HEAD_SIZE);
b5996f11 552 if (unlikely(!skb)) {
553 netdev_err(ndev, "alloc rx skb fail\n");
554 ring->stats.sw_err_cnt++;
555 return -ENOMEM;
556 }
557
13ac695e
S		 558 length = le16_to_cpu(desc->rx.pkt_len);
559 bnum_flag = le32_to_cpu(desc->rx.ipoff_bnum_pid_flag);
560 priv->ops.get_rxd_bnum(bnum_flag, &bnum);
561 *out_bnum = bnum;
562
563 /* we will be copying header into skb->data in
564 * pskb_may_pull so it is in our interest to prefetch
565 * it now to avoid a possible cache miss
566 */
567 prefetchw(skb->data);
568
b5996f11 569 if (length <= HNS_RX_HEAD_SIZE) {
570 memcpy(__skb_put(skb, length), va, ALIGN(length, sizeof(long)));
571
572 /* we can reuse buffer as-is, just make sure it is local */
573 if (likely(page_to_nid(desc_cb->priv) == numa_node_id()))
574 desc_cb->reuse_flag = 1;
575 else /* this page cannot be reused so discard it */
576 put_page(desc_cb->priv);
577
578 ring_ptr_move_fw(ring, next_to_clean);
579
580 if (unlikely(bnum != 1)) { /* check err*/
581 *out_bnum = 1;
582 goto out_bnum_err;
583 }
584 } else {
585 ring->stats.seg_pkt_cnt++;
586
587 pull_len = hns_nic_get_headlen(va, bnum_flag, HNS_RX_HEAD_SIZE);
588 memcpy(__skb_put(skb, pull_len), va,
589 ALIGN(pull_len, sizeof(long)));
590
591 size = le16_to_cpu(desc->rx.size);
592 truesize = ALIGN(size, L1_CACHE_BYTES);
593 skb_add_rx_frag(skb, 0, desc_cb->priv,
594 desc_cb->page_offset + pull_len,
595 size - pull_len, truesize - pull_len);
596
597 hns_nic_reuse_page(desc_cb, truesize, last_offset);
598 ring_ptr_move_fw(ring, next_to_clean);
599
600 if (unlikely(bnum >= (int)MAX_SKB_FRAGS)) { /* check err*/
601 *out_bnum = 1;
602 goto out_bnum_err;
603 }
604 for (i = 1; i < bnum; i++) {
605 desc = &ring->desc[ring->next_to_clean];
606 desc_cb = &ring->desc_cb[ring->next_to_clean];
607 size = le16_to_cpu(desc->rx.size);
608 truesize = ALIGN(size, L1_CACHE_BYTES);
609 skb_add_rx_frag(skb, i, desc_cb->priv,
610 desc_cb->page_offset,
611 size, truesize);
612
613 hns_nic_reuse_page(desc_cb, truesize, last_offset);
614 ring_ptr_move_fw(ring, next_to_clean);
615 }
616 }
617
618 /* check except process, free skb and jump the desc */
619 if (unlikely((!bnum) || (bnum > ring->max_desc_num_per_pkt))) {
620out_bnum_err:
621 *out_bnum = *out_bnum ? *out_bnum : 1; /* ntc moved,cannot 0*/
622 netdev_err(ndev, "invalid bnum(%d,%d,%d,%d),%016llx,%016llx\n",
623 bnum, ring->max_desc_num_per_pkt,
624 length, (int)MAX_SKB_FRAGS,
625 ((u64 *)desc)[0], ((u64 *)desc)[1]);
626 ring->stats.err_bd_num++;
627 dev_kfree_skb_any(skb);
628 return -EDOM;
629 }
630
631 bnum_flag = le32_to_cpu(desc->rx.ipoff_bnum_pid_flag);
632
633 if (unlikely(!hnae_get_bit(bnum_flag, HNS_RXD_VLD_B))) {
634 netdev_err(ndev, "no valid bd,%016llx,%016llx\n",
635 ((u64 *)desc)[0], ((u64 *)desc)[1]);
636 ring->stats.non_vld_descs++;
637 dev_kfree_skb_any(skb);
638 return -EINVAL;
639 }
640
641 if (unlikely((!desc->rx.pkt_len) ||
642 hnae_get_bit(bnum_flag, HNS_RXD_DROP_B))) {
b5996f11 643 ring->stats.err_pkt_len++;
644 dev_kfree_skb_any(skb);
645 return -EFAULT;
646 }
647
648 if (unlikely(hnae_get_bit(bnum_flag, HNS_RXD_L2E_B))) {
b5996f11 649 ring->stats.l2_err++;
650 dev_kfree_skb_any(skb);
651 return -EFAULT;
652 }
653
654 ring->stats.rx_pkts++;
655 ring->stats.rx_bytes += skb->len;
656
657 if (unlikely(hnae_get_bit(bnum_flag, HNS_RXD_L3E_B) ||
658 hnae_get_bit(bnum_flag, HNS_RXD_L4E_B))) {
b5996f11 659 ring->stats.l3l4_csum_err++;
660 return 0;
661 }
662
663 skb->ip_summed = CHECKSUM_UNNECESSARY;
664
665 return 0;
666}
667
668static void
669hns_nic_alloc_rx_buffers(struct hns_nic_ring_data *ring_data, int cleand_count)
670{
671 int i, ret;
672 struct hnae_desc_cb res_cbs;
673 struct hnae_desc_cb *desc_cb;
674 struct hnae_ring *ring = ring_data->ring;
675 struct net_device *ndev = ring_data->napi.dev;
676
677 for (i = 0; i < cleand_count; i++) {
678 desc_cb = &ring->desc_cb[ring->next_to_use];
679 if (desc_cb->reuse_flag) {
680 ring->stats.reuse_pg_cnt++;
681 hnae_reuse_buffer(ring, ring->next_to_use);
682 } else {
683 ret = hnae_reserve_buffer_map(ring, &res_cbs);
684 if (ret) {
685 ring->stats.sw_err_cnt++;
686 netdev_err(ndev, "hnae reserve buffer map failed.\n");
687 break;
688 }
689 hnae_replace_buffer(ring, ring->next_to_use, &res_cbs);
690 }
691
692 ring_ptr_move_fw(ring, next_to_use);
693 }
694
695 wmb(); /* make all data has been write before submit */
696 writel_relaxed(i, ring->io_base + RCB_REG_HEAD);
697}
698
699/* return error number for error or number of desc left to take
700 */
701static void hns_nic_rx_up_pro(struct hns_nic_ring_data *ring_data,
702 struct sk_buff *skb)
703{
704 struct net_device *ndev = ring_data->napi.dev;
705
706 skb->protocol = eth_type_trans(skb, ndev);
707 (void)napi_gro_receive(&ring_data->napi, skb);
708 ndev->last_rx = jiffies;
709}
710
711static int hns_nic_rx_poll_one(struct hns_nic_ring_data *ring_data,
712 int budget, void *v)
713{
714 struct hnae_ring *ring = ring_data->ring;
715 struct sk_buff *skb;
716 int num, bnum, ex_num;
717#define RCB_NOF_ALLOC_RX_BUFF_ONCE 16
718 int recv_pkts, recv_bds, clean_count, err;
719
720 num = readl_relaxed(ring->io_base + RCB_REG_FBDNUM);
721 rmb(); /* make sure num taken effect before the other data is touched */
722
723 recv_pkts = 0, recv_bds = 0, clean_count = 0;
724recv:
725 while (recv_pkts < budget && recv_bds < num) {
726 /* reuse or realloc buffers*/
727 if (clean_count >= RCB_NOF_ALLOC_RX_BUFF_ONCE) {
728 hns_nic_alloc_rx_buffers(ring_data, clean_count);
729 clean_count = 0;
730 }
731
732 /* poll one pkg*/
733 err = hns_nic_poll_rx_skb(ring_data, &skb, &bnum);
734 if (unlikely(!skb)) /* this fault cannot be repaired */
735 break;
736
737 recv_bds += bnum;
738 clean_count += bnum;
739 if (unlikely(err)) { /* do jump the err */
740 recv_pkts++;
741 continue;
742 }
743
744 /* do update ip stack process*/
745 ((void (*)(struct hns_nic_ring_data *, struct sk_buff *))v)(
746 ring_data, skb);
747 recv_pkts++;
748 }
749
750 /* make all data has been write before submit */
b5996f11 751 if (recv_pkts < budget) {
752 ex_num = readl_relaxed(ring->io_base + RCB_REG_FBDNUM);
753 rmb(); /*complete read rx ring bd number*/
13ac695e
S		 754 if (ex_num > clean_count) {
755 num += ex_num - clean_count;
b5996f11 756 goto recv;
757 }
758 }
759
13ac695e
S		 760 /* make all data has been write before submit */
761 if (clean_count > 0)
762 hns_nic_alloc_rx_buffers(ring_data, clean_count);
763
b5996f11 764 return recv_pkts;
765}
766
767static void hns_nic_rx_fini_pro(struct hns_nic_ring_data *ring_data)
768{
769 struct hnae_ring *ring = ring_data->ring;
770 int num = 0;
771
772 /* for hardware bug fixed */
773 num = readl_relaxed(ring->io_base + RCB_REG_FBDNUM);
774
775 if (num > 0) {
776 ring_data->ring->q->handle->dev->ops->toggle_ring_irq(
777 ring_data->ring, 1);
778
779 napi_schedule(&ring_data->napi);
780 }
781}
782
783static inline void hns_nic_reclaim_one_desc(struct hnae_ring *ring,
784 int *bytes, int *pkts)
785{
786 struct hnae_desc_cb *desc_cb = &ring->desc_cb[ring->next_to_clean];
787
788 (*pkts) += (desc_cb->type == DESC_TYPE_SKB);
789 (*bytes) += desc_cb->length;
790 /* desc_cb will be cleaned, after hnae_free_buffer_detach*/
791 hnae_free_buffer_detach(ring, ring->next_to_clean);
792
793 ring_ptr_move_fw(ring, next_to_clean);
794}
795
796static int is_valid_clean_head(struct hnae_ring *ring, int h)
797{
798 int u = ring->next_to_use;
799 int c = ring->next_to_clean;
800
801 if (unlikely(h > ring->desc_num))
802 return 0;
803
804 assert(u > 0 && u < ring->desc_num);
805 assert(c > 0 && c < ring->desc_num);
806 assert(u != c && h != c); /* must be checked before call this func */
807
808 return u > c ? (h > c && h <= u) : (h > c || h <= u);
809}
810
811/* netif_tx_lock will turn down the performance, set only when necessary */
812#ifdef CONFIG_NET_POLL_CONTROLLER
813#define NETIF_TX_LOCK(ndev) netif_tx_lock(ndev)
814#define NETIF_TX_UNLOCK(ndev) netif_tx_unlock(ndev)
815#else
816#define NETIF_TX_LOCK(ndev)
817#define NETIF_TX_UNLOCK(ndev)
818#endif
819/* reclaim all desc in one budget
820 * return error or number of desc left
821 */
822static int hns_nic_tx_poll_one(struct hns_nic_ring_data *ring_data,
823 int budget, void *v)
824{
825 struct hnae_ring *ring = ring_data->ring;
826 struct net_device *ndev = ring_data->napi.dev;
827 struct netdev_queue *dev_queue;
828 struct hns_nic_priv *priv = netdev_priv(ndev);
829 int head;
830 int bytes, pkts;
831
832 NETIF_TX_LOCK(ndev);
833
834 head = readl_relaxed(ring->io_base + RCB_REG_HEAD);
835 rmb(); /* make sure head is ready before touch any data */
836
837 if (is_ring_empty(ring) || head == ring->next_to_clean) {
838 NETIF_TX_UNLOCK(ndev);
839 return 0; /* no data to poll */
840 }
841
842 if (!is_valid_clean_head(ring, head)) {
843 netdev_err(ndev, "wrong head (%d, %d-%d)\n", head,
844 ring->next_to_use, ring->next_to_clean);
845 ring->stats.io_err_cnt++;
846 NETIF_TX_UNLOCK(ndev);
847 return -EIO;
848 }
849
850 bytes = 0;
851 pkts = 0;
852 while (head != ring->next_to_clean)
853 hns_nic_reclaim_one_desc(ring, &bytes, &pkts);
854
855 NETIF_TX_UNLOCK(ndev);
856
857 dev_queue = netdev_get_tx_queue(ndev, ring_data->queue_index);
858 netdev_tx_completed_queue(dev_queue, pkts, bytes);
859
13ac695e
S		 860 if (unlikely(priv->link && !netif_carrier_ok(ndev)))
861 netif_carrier_on(ndev);
862
b5996f11 863 if (unlikely(pkts && netif_carrier_ok(ndev) &&
864 (ring_space(ring) >= ring->max_desc_num_per_pkt * 2))) {
865 /* Make sure that anybody stopping the queue after this
866 * sees the new next_to_clean.
867 */
868 smp_mb();
869 if (netif_tx_queue_stopped(dev_queue) &&
870 !test_bit(NIC_STATE_DOWN, &priv->state)) {
871 netif_tx_wake_queue(dev_queue);
872 ring->stats.restart_queue++;
873 }
874 }
875 return 0;
876}
877
878static void hns_nic_tx_fini_pro(struct hns_nic_ring_data *ring_data)
879{
880 struct hnae_ring *ring = ring_data->ring;
881 int head = ring->next_to_clean;
882
883 /* for hardware bug fixed */
884 head = readl_relaxed(ring->io_base + RCB_REG_HEAD);
885
886 if (head != ring->next_to_clean) {
887 ring_data->ring->q->handle->dev->ops->toggle_ring_irq(
888 ring_data->ring, 1);
889
890 napi_schedule(&ring_data->napi);
891 }
892}
893
894static void hns_nic_tx_clr_all_bufs(struct hns_nic_ring_data *ring_data)
895{
896 struct hnae_ring *ring = ring_data->ring;
897 struct net_device *ndev = ring_data->napi.dev;
898 struct netdev_queue *dev_queue;
899 int head;
900 int bytes, pkts;
901
902 NETIF_TX_LOCK(ndev);
903
904 head = ring->next_to_use; /* ntu :soft setted ring position*/
905 bytes = 0;
906 pkts = 0;
907 while (head != ring->next_to_clean)
908 hns_nic_reclaim_one_desc(ring, &bytes, &pkts);
909
910 NETIF_TX_UNLOCK(ndev);
911
912 dev_queue = netdev_get_tx_queue(ndev, ring_data->queue_index);
913 netdev_tx_reset_queue(dev_queue);
914}
915
916static int hns_nic_common_poll(struct napi_struct *napi, int budget)
917{
918 struct hns_nic_ring_data *ring_data =
919 container_of(napi, struct hns_nic_ring_data, napi);
920 int clean_complete = ring_data->poll_one(
921 ring_data, budget, ring_data->ex_process);
922
923 if (clean_complete >= 0 && clean_complete < budget) {
924 napi_complete(napi);
925 ring_data->ring->q->handle->dev->ops->toggle_ring_irq(
926 ring_data->ring, 0);
927
928 ring_data->fini_process(ring_data);
929 }
930
931 return clean_complete;
932}
933
934static irqreturn_t hns_irq_handle(int irq, void *dev)
935{
936 struct hns_nic_ring_data *ring_data = (struct hns_nic_ring_data *)dev;
937
938 ring_data->ring->q->handle->dev->ops->toggle_ring_irq(
939 ring_data->ring, 1);
940 napi_schedule(&ring_data->napi);
941
942 return IRQ_HANDLED;
943}
944
945/**
946 *hns_nic_adjust_link - adjust net work mode by the phy stat or new param
947 *@ndev: net device
948 */
949static void hns_nic_adjust_link(struct net_device *ndev)
950{
951 struct hns_nic_priv *priv = netdev_priv(ndev);
952 struct hnae_handle *h = priv->ae_handle;
953
954 h->dev->ops->adjust_link(h, ndev->phydev->speed, ndev->phydev->duplex);
955}
956
957/**
958 *hns_nic_init_phy - init phy
959 *@ndev: net device
960 *@h: ae handle
961 * Return 0 on success, negative on failure
962 */
963int hns_nic_init_phy(struct net_device *ndev, struct hnae_handle *h)
964{
965 struct hns_nic_priv *priv = netdev_priv(ndev);
966 struct phy_device *phy_dev = NULL;
967
968 if (!h->phy_node)
969 return 0;
970
971 if (h->phy_if != PHY_INTERFACE_MODE_XGMII)
972 phy_dev = of_phy_connect(ndev, h->phy_node,
973 hns_nic_adjust_link, 0, h->phy_if);
974 else
975 phy_dev = of_phy_attach(ndev, h->phy_node, 0, h->phy_if);
976
977 if (unlikely(!phy_dev) || IS_ERR(phy_dev))
978 return !phy_dev ? -ENODEV : PTR_ERR(phy_dev);
979
980 phy_dev->supported &= h->if_support;
981 phy_dev->advertising = phy_dev->supported;
982
983 if (h->phy_if == PHY_INTERFACE_MODE_XGMII)
984 phy_dev->autoneg = false;
985
986 priv->phy = phy_dev;
987
988 return 0;
989}
990
991static int hns_nic_ring_open(struct net_device *netdev, int idx)
992{
993 struct hns_nic_priv *priv = netdev_priv(netdev);
994 struct hnae_handle *h = priv->ae_handle;
995
996 napi_enable(&priv->ring_data[idx].napi);
997
998 enable_irq(priv->ring_data[idx].ring->irq);
999 h->dev->ops->toggle_ring_irq(priv->ring_data[idx].ring, 0);
1000
1001 return 0;
1002}
1003
1004static int hns_nic_net_set_mac_address(struct net_device *ndev, void *p)
1005{
1006 struct hns_nic_priv *priv = netdev_priv(ndev);
1007 struct hnae_handle *h = priv->ae_handle;
1008 struct sockaddr *mac_addr = p;
1009 int ret;
1010
1011 if (!mac_addr || !is_valid_ether_addr((const u8 *)mac_addr->sa_data))
1012 return -EADDRNOTAVAIL;
1013
1014 ret = h->dev->ops->set_mac_addr(h, mac_addr->sa_data);
1015 if (ret) {
1016 netdev_err(ndev, "set_mac_address fail, ret=%d!\n", ret);
1017 return ret;
1018 }
1019
1020 memcpy(ndev->dev_addr, mac_addr->sa_data, ndev->addr_len);
1021
1022 return 0;
1023}
1024
1025void hns_nic_update_stats(struct net_device *netdev)
1026{
1027 struct hns_nic_priv *priv = netdev_priv(netdev);
1028 struct hnae_handle *h = priv->ae_handle;
1029
1030 h->dev->ops->update_stats(h, &netdev->stats);
1031}
1032
1033/* set mac addr if it is configed. or leave it to the AE driver */
1034static void hns_init_mac_addr(struct net_device *ndev)
1035{
1036 struct hns_nic_priv *priv = netdev_priv(ndev);
1037 struct device_node *node = priv->dev->of_node;
1038 const void *mac_addr_temp;
1039
1040 mac_addr_temp = of_get_mac_address(node);
1041 if (mac_addr_temp && is_valid_ether_addr(mac_addr_temp)) {
1042 memcpy(ndev->dev_addr, mac_addr_temp, ndev->addr_len);
1043 } else {
1044 eth_hw_addr_random(ndev);
1045 dev_warn(priv->dev, "No valid mac, use random mac %pM",
1046 ndev->dev_addr);
1047 }
1048}
1049
1050static void hns_nic_ring_close(struct net_device *netdev, int idx)
1051{
1052 struct hns_nic_priv *priv = netdev_priv(netdev);
1053 struct hnae_handle *h = priv->ae_handle;
1054
1055 h->dev->ops->toggle_ring_irq(priv->ring_data[idx].ring, 1);
1056 disable_irq(priv->ring_data[idx].ring->irq);
1057
1058 napi_disable(&priv->ring_data[idx].napi);
1059}
1060
13ac695e 1061static void hns_set_irq_affinity(struct hns_nic_priv *priv)
b5996f11 1062{
1063 struct hnae_handle *h = priv->ae_handle;
1064 struct hns_nic_ring_data *rd;
1065 int i;
b5996f11 1066 int cpu;
1067 cpumask_t mask;
1068
13ac695e
S		 1069 /*diffrent irq banlance for 16core and 32core*/
1070 if (h->q_num == num_possible_cpus()) {
1071 for (i = 0; i < h->q_num * 2; i++) {
1072 rd = &priv->ring_data[i];
1073 if (cpu_online(rd->queue_index)) {
1074 cpumask_clear(&mask);
1075 cpu = rd->queue_index;
1076 cpumask_set_cpu(cpu, &mask);
1077 (void)irq_set_affinity_hint(rd->ring->irq,
1078 &mask);
1079 }
1080 }
1081 } else {
1082 for (i = 0; i < h->q_num; i++) {
1083 rd = &priv->ring_data[i];
1084 if (cpu_online(rd->queue_index * 2)) {
1085 cpumask_clear(&mask);
1086 cpu = rd->queue_index * 2;
1087 cpumask_set_cpu(cpu, &mask);
1088 (void)irq_set_affinity_hint(rd->ring->irq,
1089 &mask);
1090 }
1091 }
1092
1093 for (i = h->q_num; i < h->q_num * 2; i++) {
1094 rd = &priv->ring_data[i];
1095 if (cpu_online(rd->queue_index * 2 + 1)) {
1096 cpumask_clear(&mask);
1097 cpu = rd->queue_index * 2 + 1;
1098 cpumask_set_cpu(cpu, &mask);
1099 (void)irq_set_affinity_hint(rd->ring->irq,
1100 &mask);
1101 }
1102 }
1103 }
1104}
1105
1106static int hns_nic_init_irq(struct hns_nic_priv *priv)
1107{
1108 struct hnae_handle *h = priv->ae_handle;
1109 struct hns_nic_ring_data *rd;
1110 int i;
1111 int ret;
1112
b5996f11 1113 for (i = 0; i < h->q_num * 2; i++) {
1114 rd = &priv->ring_data[i];
1115
1116 if (rd->ring->irq_init_flag == RCB_IRQ_INITED)
1117 break;
1118
1119 snprintf(rd->ring->ring_name, RCB_RING_NAME_LEN,
1120 "%s-%s%d", priv->netdev->name,
1121 (i < h->q_num ? "tx" : "rx"), rd->queue_index);
1122
1123 rd->ring->ring_name[RCB_RING_NAME_LEN - 1] = '\0';
1124
1125 ret = request_irq(rd->ring->irq,
1126 hns_irq_handle, 0, rd->ring->ring_name, rd);
1127 if (ret) {
1128 netdev_err(priv->netdev, "request irq(%d) fail\n",
1129 rd->ring->irq);
1130 return ret;
1131 }
1132 disable_irq(rd->ring->irq);
1133 rd->ring->irq_init_flag = RCB_IRQ_INITED;
b5996f11 1134 }
1135
13ac695e
S		 1136 /*set cpu affinity*/
1137 hns_set_irq_affinity(priv);
1138
b5996f11 1139 return 0;
1140}
1141
1142static int hns_nic_net_up(struct net_device *ndev)
1143{
1144 struct hns_nic_priv *priv = netdev_priv(ndev);
1145 struct hnae_handle *h = priv->ae_handle;
1146 int i, j, k;
1147 int ret;
1148
1149 ret = hns_nic_init_irq(priv);
1150 if (ret != 0) {
1151 netdev_err(ndev, "hns init irq failed! ret=%d\n", ret);
1152 return ret;
1153 }
1154
1155 for (i = 0; i < h->q_num * 2; i++) {
1156 ret = hns_nic_ring_open(ndev, i);
1157 if (ret)
1158 goto out_has_some_queues;
1159 }
1160
1161 for (k = 0; k < h->q_num; k++)
1162 h->dev->ops->toggle_queue_status(h->qs[k], 1);
1163
1164 ret = h->dev->ops->set_mac_addr(h, ndev->dev_addr);
1165 if (ret)
1166 goto out_set_mac_addr_err;
1167
1168 ret = h->dev->ops->start ? h->dev->ops->start(h) : 0;
1169 if (ret)
1170 goto out_start_err;
1171
1172 if (priv->phy)
1173 phy_start(priv->phy);
1174
1175 clear_bit(NIC_STATE_DOWN, &priv->state);
1176 (void)mod_timer(&priv->service_timer, jiffies + SERVICE_TIMER_HZ);
1177
1178 return 0;
1179
1180out_start_err:
1181 netif_stop_queue(ndev);
1182out_set_mac_addr_err:
1183 for (k = 0; k < h->q_num; k++)
1184 h->dev->ops->toggle_queue_status(h->qs[k], 0);
1185out_has_some_queues:
1186 for (j = i - 1; j >= 0; j--)
1187 hns_nic_ring_close(ndev, j);
1188
1189 set_bit(NIC_STATE_DOWN, &priv->state);
1190
1191 return ret;
1192}
1193
1194static void hns_nic_net_down(struct net_device *ndev)
1195{
1196 int i;
1197 struct hnae_ae_ops *ops;
1198 struct hns_nic_priv *priv = netdev_priv(ndev);
1199
1200 if (test_and_set_bit(NIC_STATE_DOWN, &priv->state))
1201 return;
1202
1203 (void)del_timer_sync(&priv->service_timer);
1204 netif_tx_stop_all_queues(ndev);
1205 netif_carrier_off(ndev);
1206 netif_tx_disable(ndev);
1207 priv->link = 0;
1208
1209 if (priv->phy)
1210 phy_stop(priv->phy);
1211
1212 ops = priv->ae_handle->dev->ops;
1213
1214 if (ops->stop)
1215 ops->stop(priv->ae_handle);
1216
1217 netif_tx_stop_all_queues(ndev);
1218
1219 for (i = priv->ae_handle->q_num - 1; i >= 0; i--) {
1220 hns_nic_ring_close(ndev, i);
1221 hns_nic_ring_close(ndev, i + priv->ae_handle->q_num);
1222
1223 /* clean tx buffers*/
1224 hns_nic_tx_clr_all_bufs(priv->ring_data + i);
1225 }
1226}
1227
1228void hns_nic_net_reset(struct net_device *ndev)
1229{
1230 struct hns_nic_priv *priv = netdev_priv(ndev);
1231 struct hnae_handle *handle = priv->ae_handle;
1232
1233 while (test_and_set_bit(NIC_STATE_RESETTING, &priv->state))
1234 usleep_range(1000, 2000);
1235
1236 (void)hnae_reinit_handle(handle);
1237
1238 clear_bit(NIC_STATE_RESETTING, &priv->state);
1239}
1240
1241void hns_nic_net_reinit(struct net_device *netdev)
1242{
1243 struct hns_nic_priv *priv = netdev_priv(netdev);
1244
1245 priv->netdev->trans_start = jiffies;
1246 while (test_and_set_bit(NIC_STATE_REINITING, &priv->state))
1247 usleep_range(1000, 2000);
1248
1249 hns_nic_net_down(netdev);
1250 hns_nic_net_reset(netdev);
1251 (void)hns_nic_net_up(netdev);
1252 clear_bit(NIC_STATE_REINITING, &priv->state);
1253}
1254
1255static int hns_nic_net_open(struct net_device *ndev)
1256{
1257 struct hns_nic_priv *priv = netdev_priv(ndev);
1258 struct hnae_handle *h = priv->ae_handle;
1259 int ret;
1260
1261 if (test_bit(NIC_STATE_TESTING, &priv->state))
1262 return -EBUSY;
1263
1264 priv->link = 0;
1265 netif_carrier_off(ndev);
1266
1267 ret = netif_set_real_num_tx_queues(ndev, h->q_num);
1268 if (ret < 0) {
1269 netdev_err(ndev, "netif_set_real_num_tx_queues fail, ret=%d!\n",
1270 ret);
1271 return ret;
1272 }
1273
1274 ret = netif_set_real_num_rx_queues(ndev, h->q_num);
1275 if (ret < 0) {
1276 netdev_err(ndev,
1277 "netif_set_real_num_rx_queues fail, ret=%d!\n", ret);
1278 return ret;
1279 }
1280
1281 ret = hns_nic_net_up(ndev);
1282 if (ret) {
1283 netdev_err(ndev,
1284 "hns net up fail, ret=%d!\n", ret);
1285 return ret;
1286 }
1287
1288 return 0;
1289}
1290
1291static int hns_nic_net_stop(struct net_device *ndev)
1292{
1293 hns_nic_net_down(ndev);
1294
1295 return 0;
1296}
1297
1298static void hns_tx_timeout_reset(struct hns_nic_priv *priv);
1299static void hns_nic_net_timeout(struct net_device *ndev)
1300{
1301 struct hns_nic_priv *priv = netdev_priv(ndev);
1302
1303 hns_tx_timeout_reset(priv);
1304}
1305
1306static int hns_nic_do_ioctl(struct net_device *netdev, struct ifreq *ifr,
1307 int cmd)
1308{
1309 struct hns_nic_priv *priv = netdev_priv(netdev);
1310 struct phy_device *phy_dev = priv->phy;
1311
1312 if (!netif_running(netdev))
1313 return -EINVAL;
1314
1315 if (!phy_dev)
1316 return -ENOTSUPP;
1317
1318 return phy_mii_ioctl(phy_dev, ifr, cmd);
1319}
1320
1321/* use only for netconsole to poll with the device without interrupt */
1322#ifdef CONFIG_NET_POLL_CONTROLLER
1323void hns_nic_poll_controller(struct net_device *ndev)
1324{
1325 struct hns_nic_priv *priv = netdev_priv(ndev);
1326 unsigned long flags;
1327 int i;
1328
1329 local_irq_save(flags);
1330 for (i = 0; i < priv->ae_handle->q_num * 2; i++)
1331 napi_schedule(&priv->ring_data[i].napi);
1332 local_irq_restore(flags);
1333}
1334#endif
1335
1336static netdev_tx_t hns_nic_net_xmit(struct sk_buff *skb,
1337 struct net_device *ndev)
1338{
1339 struct hns_nic_priv *priv = netdev_priv(ndev);
1340 int ret;
1341
1342 assert(skb->queue_mapping < ndev->ae_handle->q_num);
1343 ret = hns_nic_net_xmit_hw(ndev, skb,
1344 &tx_ring_data(priv, skb->queue_mapping));
1345 if (ret == NETDEV_TX_OK) {
1346 ndev->trans_start = jiffies;
1347 ndev->stats.tx_bytes += skb->len;
1348 ndev->stats.tx_packets++;
1349 }
1350 return (netdev_tx_t)ret;
1351}
1352
1353static int hns_nic_change_mtu(struct net_device *ndev, int new_mtu)
1354{
1355 struct hns_nic_priv *priv = netdev_priv(ndev);
1356 struct hnae_handle *h = priv->ae_handle;
1357 int ret;
1358
1359 /* MTU < 68 is an error and causes problems on some kernels */
1360 if (new_mtu < 68)
1361 return -EINVAL;
1362
1363 if (!h->dev->ops->set_mtu)
1364 return -ENOTSUPP;
1365
1366 if (netif_running(ndev)) {
1367 (void)hns_nic_net_stop(ndev);
1368 msleep(100);
1369
1370 ret = h->dev->ops->set_mtu(h, new_mtu);
1371 if (ret)
1372 netdev_err(ndev, "set mtu fail, return value %d\n",
1373 ret);
1374
1375 if (hns_nic_net_open(ndev))
1376 netdev_err(ndev, "hns net open fail\n");
1377 } else {
1378 ret = h->dev->ops->set_mtu(h, new_mtu);
1379 }
1380
1381 if (!ret)
1382 ndev->mtu = new_mtu;
1383
1384 return ret;
1385}
1386
1387/**
1388 * nic_set_multicast_list - set mutl mac address
1389 * @netdev: net device
1390 * @p: mac address
1391 *
1392 * return void
1393 */
1394void hns_set_multicast_list(struct net_device *ndev)
1395{
1396 struct hns_nic_priv *priv = netdev_priv(ndev);
1397 struct hnae_handle *h = priv->ae_handle;
1398 struct netdev_hw_addr *ha = NULL;
1399
1400 if (!h) {
1401 netdev_err(ndev, "hnae handle is null\n");
1402 return;
1403 }
1404
1405 if (h->dev->ops->set_mc_addr) {
1406 netdev_for_each_mc_addr(ha, ndev)
1407 if (h->dev->ops->set_mc_addr(h, ha->addr))
1408 netdev_err(ndev, "set multicast fail\n");
1409 }
1410}
1411
4568637f 1412void hns_nic_set_rx_mode(struct net_device *ndev)
1413{
1414 struct hns_nic_priv *priv = netdev_priv(ndev);
1415 struct hnae_handle *h = priv->ae_handle;
1416
1417 if (h->dev->ops->set_promisc_mode) {
1418 if (ndev->flags & IFF_PROMISC)
1419 h->dev->ops->set_promisc_mode(h, 1);
1420 else
1421 h->dev->ops->set_promisc_mode(h, 0);
1422 }
1423
1424 hns_set_multicast_list(ndev);
1425}
1426
b5996f11 1427struct rtnl_link_stats64 *hns_nic_get_stats64(struct net_device *ndev,
1428 struct rtnl_link_stats64 *stats)
1429{
1430 int idx = 0;
1431 u64 tx_bytes = 0;
1432 u64 rx_bytes = 0;
1433 u64 tx_pkts = 0;
1434 u64 rx_pkts = 0;
1435 struct hns_nic_priv *priv = netdev_priv(ndev);
1436 struct hnae_handle *h = priv->ae_handle;
1437
1438 for (idx = 0; idx < h->q_num; idx++) {
1439 tx_bytes += h->qs[idx]->tx_ring.stats.tx_bytes;
1440 tx_pkts += h->qs[idx]->tx_ring.stats.tx_pkts;
1441 rx_bytes += h->qs[idx]->rx_ring.stats.rx_bytes;
1442 rx_pkts += h->qs[idx]->rx_ring.stats.rx_pkts;
1443 }
1444
1445 stats->tx_bytes = tx_bytes;
1446 stats->tx_packets = tx_pkts;
1447 stats->rx_bytes = rx_bytes;
1448 stats->rx_packets = rx_pkts;
1449
1450 stats->rx_errors = ndev->stats.rx_errors;
1451 stats->multicast = ndev->stats.multicast;
1452 stats->rx_length_errors = ndev->stats.rx_length_errors;
1453 stats->rx_crc_errors = ndev->stats.rx_crc_errors;
1454 stats->rx_missed_errors = ndev->stats.rx_missed_errors;
1455
1456 stats->tx_errors = ndev->stats.tx_errors;
1457 stats->rx_dropped = ndev->stats.rx_dropped;
1458 stats->tx_dropped = ndev->stats.tx_dropped;
1459 stats->collisions = ndev->stats.collisions;
1460 stats->rx_over_errors = ndev->stats.rx_over_errors;
1461 stats->rx_frame_errors = ndev->stats.rx_frame_errors;
1462 stats->rx_fifo_errors = ndev->stats.rx_fifo_errors;
1463 stats->tx_aborted_errors = ndev->stats.tx_aborted_errors;
1464 stats->tx_carrier_errors = ndev->stats.tx_carrier_errors;
1465 stats->tx_fifo_errors = ndev->stats.tx_fifo_errors;
1466 stats->tx_heartbeat_errors = ndev->stats.tx_heartbeat_errors;
1467 stats->tx_window_errors = ndev->stats.tx_window_errors;
1468 stats->rx_compressed = ndev->stats.rx_compressed;
1469 stats->tx_compressed = ndev->stats.tx_compressed;
1470
1471 return stats;
1472}
1473
1474static const struct net_device_ops hns_nic_netdev_ops = {
1475 .ndo_open = hns_nic_net_open,
1476 .ndo_stop = hns_nic_net_stop,
1477 .ndo_start_xmit = hns_nic_net_xmit,
1478 .ndo_tx_timeout = hns_nic_net_timeout,
1479 .ndo_set_mac_address = hns_nic_net_set_mac_address,
1480 .ndo_change_mtu = hns_nic_change_mtu,
1481 .ndo_do_ioctl = hns_nic_do_ioctl,
1482 .ndo_get_stats64 = hns_nic_get_stats64,
1483#ifdef CONFIG_NET_POLL_CONTROLLER
1484 .ndo_poll_controller = hns_nic_poll_controller,
1485#endif
4568637f 1486 .ndo_set_rx_mode = hns_nic_set_rx_mode,
b5996f11 1487};
1488
1489static void hns_nic_update_link_status(struct net_device *netdev)
1490{
1491 struct hns_nic_priv *priv = netdev_priv(netdev);
1492
1493 struct hnae_handle *h = priv->ae_handle;
1494 int state = 1;
1495
1496 if (priv->phy) {
1497 if (!genphy_update_link(priv->phy))
1498 state = priv->phy->link;
1499 else
1500 state = 0;
1501 }
1502 state = state && h->dev->ops->get_status(h);
1503
1504 if (state != priv->link) {
1505 if (state) {
1506 netif_carrier_on(netdev);
1507 netif_tx_wake_all_queues(netdev);
1508 netdev_info(netdev, "link up\n");
1509 } else {
1510 netif_carrier_off(netdev);
1511 netdev_info(netdev, "link down\n");
1512 }
1513 priv->link = state;
1514 }
1515}
1516
1517/* for dumping key regs*/
1518static void hns_nic_dump(struct hns_nic_priv *priv)
1519{
1520 struct hnae_handle *h = priv->ae_handle;
1521 struct hnae_ae_ops *ops = h->dev->ops;
1522 u32 *data, reg_num, i;
1523
1524 if (ops->get_regs_len && ops->get_regs) {
1525 reg_num = ops->get_regs_len(priv->ae_handle);
1526 reg_num = (reg_num + 3ul) & ~3ul;
1527 data = kcalloc(reg_num, sizeof(u32), GFP_KERNEL);
1528 if (data) {
1529 ops->get_regs(priv->ae_handle, data);
1530 for (i = 0; i < reg_num; i += 4)
1531 pr_info("0x%08x: 0x%08x 0x%08x 0x%08x 0x%08x\n",
1532 i, data[i], data[i + 1],
1533 data[i + 2], data[i + 3]);
1534 kfree(data);
1535 }
1536 }
1537
1538 for (i = 0; i < h->q_num; i++) {
1539 pr_info("tx_queue%d_next_to_clean:%d\n",
1540 i, h->qs[i]->tx_ring.next_to_clean);
1541 pr_info("tx_queue%d_next_to_use:%d\n",
1542 i, h->qs[i]->tx_ring.next_to_use);
1543 pr_info("rx_queue%d_next_to_clean:%d\n",
1544 i, h->qs[i]->rx_ring.next_to_clean);
1545 pr_info("rx_queue%d_next_to_use:%d\n",
1546 i, h->qs[i]->rx_ring.next_to_use);
1547 }
1548}
1549
1550/* for resetting suntask*/
1551static void hns_nic_reset_subtask(struct hns_nic_priv *priv)
1552{
1553 enum hnae_port_type type = priv->ae_handle->port_type;
1554
1555 if (!test_bit(NIC_STATE2_RESET_REQUESTED, &priv->state))
1556 return;
1557 clear_bit(NIC_STATE2_RESET_REQUESTED, &priv->state);
1558
1559 /* If we're already down, removing or resetting, just bail */
1560 if (test_bit(NIC_STATE_DOWN, &priv->state) ||
1561 test_bit(NIC_STATE_REMOVING, &priv->state) ||
1562 test_bit(NIC_STATE_RESETTING, &priv->state))
1563 return;
1564
1565 hns_nic_dump(priv);
13ac695e
S		 1566 netdev_info(priv->netdev, "try to reset %s port!\n",
1567 (type == HNAE_PORT_DEBUG ? "debug" : "service"));
b5996f11 1568
1569 rtnl_lock();
90a505b9 1570 /* put off any impending NetWatchDogTimeout */
1571 priv->netdev->trans_start = jiffies;
1572
13ac695e 1573 if (type == HNAE_PORT_DEBUG) {
b5996f11 1574 hns_nic_net_reinit(priv->netdev);
13ac695e
S		 1575 } else {
1576 netif_carrier_off(priv->netdev);
1577 netif_tx_disable(priv->netdev);
1578 }
b5996f11 1579 rtnl_unlock();
1580}
1581
1582/* for doing service complete*/
1583static void hns_nic_service_event_complete(struct hns_nic_priv *priv)
1584{
13ac695e 1585 WARN_ON(!test_bit(NIC_STATE_SERVICE_SCHED, &priv->state));
b5996f11 1586
1587 smp_mb__before_atomic();
1588 clear_bit(NIC_STATE_SERVICE_SCHED, &priv->state);
1589}
1590
1591static void hns_nic_service_task(struct work_struct *work)
1592{
1593 struct hns_nic_priv *priv
1594 = container_of(work, struct hns_nic_priv, service_task);
1595 struct hnae_handle *h = priv->ae_handle;
1596
1597 hns_nic_update_link_status(priv->netdev);
1598 h->dev->ops->update_led_status(h);
1599 hns_nic_update_stats(priv->netdev);
1600
1601 hns_nic_reset_subtask(priv);
1602 hns_nic_service_event_complete(priv);
1603}
1604
1605static void hns_nic_task_schedule(struct hns_nic_priv *priv)
1606{
1607 if (!test_bit(NIC_STATE_DOWN, &priv->state) &&
1608 !test_bit(NIC_STATE_REMOVING, &priv->state) &&
1609 !test_and_set_bit(NIC_STATE_SERVICE_SCHED, &priv->state))
1610 (void)schedule_work(&priv->service_task);
1611}
1612
1613static void hns_nic_service_timer(unsigned long data)
1614{
1615 struct hns_nic_priv *priv = (struct hns_nic_priv *)data;
1616
1617 (void)mod_timer(&priv->service_timer, jiffies + SERVICE_TIMER_HZ);
1618
1619 hns_nic_task_schedule(priv);
1620}
1621
1622/**
1623 * hns_tx_timeout_reset - initiate reset due to Tx timeout
1624 * @priv: driver private struct
1625 **/
1626static void hns_tx_timeout_reset(struct hns_nic_priv *priv)
1627{
1628 /* Do the reset outside of interrupt context */
1629 if (!test_bit(NIC_STATE_DOWN, &priv->state)) {
1630 set_bit(NIC_STATE2_RESET_REQUESTED, &priv->state);
1631 netdev_warn(priv->netdev,
1632 "initiating reset due to tx timeout(%llu,0x%lx)\n",
1633 priv->tx_timeout_count, priv->state);
1634 priv->tx_timeout_count++;
1635 hns_nic_task_schedule(priv);
1636 }
1637}
1638
1639static int hns_nic_init_ring_data(struct hns_nic_priv *priv)
1640{
1641 struct hnae_handle *h = priv->ae_handle;
1642 struct hns_nic_ring_data *rd;
1643 int i;
1644
1645 if (h->q_num > NIC_MAX_Q_PER_VF) {
1646 netdev_err(priv->netdev, "too much queue (%d)\n", h->q_num);
1647 return -EINVAL;
1648 }
1649
1650 priv->ring_data = kzalloc(h->q_num * sizeof(*priv->ring_data) * 2,
1651 GFP_KERNEL);
1652 if (!priv->ring_data)
1653 return -ENOMEM;
1654
1655 for (i = 0; i < h->q_num; i++) {
1656 rd = &priv->ring_data[i];
1657 rd->queue_index = i;
1658 rd->ring = &h->qs[i]->tx_ring;
1659 rd->poll_one = hns_nic_tx_poll_one;
1660 rd->fini_process = hns_nic_tx_fini_pro;
1661
1662 netif_napi_add(priv->netdev, &rd->napi,
1663 hns_nic_common_poll, NIC_TX_CLEAN_MAX_NUM);
1664 rd->ring->irq_init_flag = RCB_IRQ_NOT_INITED;
1665 }
1666 for (i = h->q_num; i < h->q_num * 2; i++) {
1667 rd = &priv->ring_data[i];
1668 rd->queue_index = i - h->q_num;
1669 rd->ring = &h->qs[i - h->q_num]->rx_ring;
1670 rd->poll_one = hns_nic_rx_poll_one;
1671 rd->ex_process = hns_nic_rx_up_pro;
1672 rd->fini_process = hns_nic_rx_fini_pro;
1673
1674 netif_napi_add(priv->netdev, &rd->napi,
1675 hns_nic_common_poll, NIC_RX_CLEAN_MAX_NUM);
1676 rd->ring->irq_init_flag = RCB_IRQ_NOT_INITED;
1677 }
1678
1679 return 0;
1680}
1681
1682static void hns_nic_uninit_ring_data(struct hns_nic_priv *priv)
1683{
1684 struct hnae_handle *h = priv->ae_handle;
1685 int i;
1686
1687 for (i = 0; i < h->q_num * 2; i++) {
1688 netif_napi_del(&priv->ring_data[i].napi);
1689 if (priv->ring_data[i].ring->irq_init_flag == RCB_IRQ_INITED) {
13ac695e
S		 1690 (void)irq_set_affinity_hint(
1691 priv->ring_data[i].ring->irq,
1692 NULL);
b5996f11 1693 free_irq(priv->ring_data[i].ring->irq,
1694 &priv->ring_data[i]);
1695 }
1696
1697 priv->ring_data[i].ring->irq_init_flag = RCB_IRQ_NOT_INITED;
1698 }
1699 kfree(priv->ring_data);
1700}
1701
13ac695e
S		 1702static void hns_nic_set_priv_ops(struct net_device *netdev)
1703{
1704 struct hns_nic_priv *priv = netdev_priv(netdev);
64353af6 1705 struct hnae_handle *h = priv->ae_handle;
13ac695e
S		 1706
1707 if (AE_IS_VER1(priv->enet_ver)) {
1708 priv->ops.fill_desc = fill_desc;
1709 priv->ops.get_rxd_bnum = get_rx_desc_bnum;
1710 priv->ops.maybe_stop_tx = hns_nic_maybe_stop_tx;
1711 } else {
1712 priv->ops.get_rxd_bnum = get_v2rx_desc_bnum;
64353af6
S		 1713 if ((netdev->features & NETIF_F_TSO) ||
1714 (netdev->features & NETIF_F_TSO6)) {
1715 priv->ops.fill_desc = fill_tso_desc;
1716 priv->ops.maybe_stop_tx = hns_nic_maybe_stop_tso;
1717 /* This chip only support 7*4096 */
1718 netif_set_gso_max_size(netdev, 7 * 4096);
1719 h->dev->ops->set_tso_stats(h, 1);
1720 } else {
1721 priv->ops.fill_desc = fill_v2_desc;
1722 priv->ops.maybe_stop_tx = hns_nic_maybe_stop_tx;
1723 }
13ac695e
S		 1724 }
1725}
1726
b5996f11 1727static int hns_nic_try_get_ae(struct net_device *ndev)
1728{
1729 struct hns_nic_priv *priv = netdev_priv(ndev);
1730 struct hnae_handle *h;
1731 int ret;
1732
1733 h = hnae_get_handle(&priv->netdev->dev,
1734 priv->ae_name, priv->port_id, NULL);
1735 if (IS_ERR_OR_NULL(h)) {
1736 ret = PTR_ERR(h);
1737 dev_dbg(priv->dev, "has not handle, register notifier!\n");
1738 goto out;
1739 }
1740 priv->ae_handle = h;
1741
1742 ret = hns_nic_init_phy(ndev, h);
1743 if (ret) {
1744 dev_err(priv->dev, "probe phy device fail!\n");
1745 goto out_init_phy;
1746 }
1747
1748 ret = hns_nic_init_ring_data(priv);
1749 if (ret) {
1750 ret = -ENOMEM;
1751 goto out_init_ring_data;
1752 }
1753
13ac695e
S		 1754 hns_nic_set_priv_ops(ndev);
1755
b5996f11 1756 ret = register_netdev(ndev);
1757 if (ret) {
1758 dev_err(priv->dev, "probe register netdev fail!\n");
1759 goto out_reg_ndev_fail;
1760 }
1761 return 0;
1762
1763out_reg_ndev_fail:
1764 hns_nic_uninit_ring_data(priv);
1765 priv->ring_data = NULL;
1766out_init_phy:
1767out_init_ring_data:
1768 hnae_put_handle(priv->ae_handle);
1769 priv->ae_handle = NULL;
1770out:
1771 return ret;
1772}
1773
1774static int hns_nic_notifier_action(struct notifier_block *nb,
1775 unsigned long action, void *data)
1776{
1777 struct hns_nic_priv *priv =
1778 container_of(nb, struct hns_nic_priv, notifier_block);
1779
1780 assert(action == HNAE_AE_REGISTER);
1781
1782 if (!hns_nic_try_get_ae(priv->netdev)) {
1783 hnae_unregister_notifier(&priv->notifier_block);
1784 priv->notifier_block.notifier_call = NULL;
1785 }
1786 return 0;
1787}
1788
1789static int hns_nic_dev_probe(struct platform_device *pdev)
1790{
1791 struct device *dev = &pdev->dev;
1792 struct net_device *ndev;
1793 struct hns_nic_priv *priv;
1794 struct device_node *node = dev->of_node;
1795 int ret;
1796
1797 ndev = alloc_etherdev_mq(sizeof(struct hns_nic_priv), NIC_MAX_Q_PER_VF);
1798 if (!ndev)
1799 return -ENOMEM;
1800
1801 platform_set_drvdata(pdev, ndev);
1802
1803 priv = netdev_priv(ndev);
1804 priv->dev = dev;
1805 priv->netdev = ndev;
1806
13ac695e 1807 if (of_device_is_compatible(node, "hisilicon,hns-nic-v1"))
b5996f11 1808 priv->enet_ver = AE_VERSION_1;
13ac695e
S		 1809 else
1810 priv->enet_ver = AE_VERSION_2;
b5996f11 1811
1812 ret = of_property_read_string(node, "ae-name", &priv->ae_name);
1813 if (ret)
1814 goto out_read_string_fail;
1815
1816 ret = of_property_read_u32(node, "port-id", &priv->port_id);
1817 if (ret)
1818 goto out_read_string_fail;
1819
1820 hns_init_mac_addr(ndev);
1821
1822 ndev->watchdog_timeo = HNS_NIC_TX_TIMEOUT;
1823 ndev->priv_flags |= IFF_UNICAST_FLT;
1824 ndev->netdev_ops = &hns_nic_netdev_ops;
1825 hns_ethtool_set_ops(ndev);
13ac695e 1826
b5996f11 1827 ndev->features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
1828 NETIF_F_RXCSUM | NETIF_F_SG | NETIF_F_GSO |
1829 NETIF_F_GRO;
1830 ndev->vlan_features |=
1831 NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM | NETIF_F_RXCSUM;
1832 ndev->vlan_features |= NETIF_F_SG | NETIF_F_GSO | NETIF_F_GRO;
1833
13ac695e
S		 1834 switch (priv->enet_ver) {
1835 case AE_VERSION_2:
64353af6 1836 ndev->features |= NETIF_F_TSO | NETIF_F_TSO6;
13ac695e
S		 1837 ndev->hw_features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
1838 NETIF_F_RXCSUM | NETIF_F_SG | NETIF_F_GSO |
64353af6 1839 NETIF_F_GRO | NETIF_F_TSO | NETIF_F_TSO6;
13ac695e
S		 1840 break;
1841 default:
1842 break;
1843 }
1844
b5996f11 1845 SET_NETDEV_DEV(ndev, dev);
1846
1847 if (!dma_set_mask_and_coherent(dev, DMA_BIT_MASK(64)))
1848 dev_dbg(dev, "set mask to 64bit\n");
1849 else
1850 dev_err(dev, "set mask to 32bit fail!\n");
1851
1852 /* carrier off reporting is important to ethtool even BEFORE open */
1853 netif_carrier_off(ndev);
1854
1855 setup_timer(&priv->service_timer, hns_nic_service_timer,
1856 (unsigned long)priv);
1857 INIT_WORK(&priv->service_task, hns_nic_service_task);
1858
1859 set_bit(NIC_STATE_SERVICE_INITED, &priv->state);
1860 clear_bit(NIC_STATE_SERVICE_SCHED, &priv->state);
1861 set_bit(NIC_STATE_DOWN, &priv->state);
1862
1863 if (hns_nic_try_get_ae(priv->netdev)) {
1864 priv->notifier_block.notifier_call = hns_nic_notifier_action;
1865 ret = hnae_register_notifier(&priv->notifier_block);
1866 if (ret) {
1867 dev_err(dev, "register notifier fail!\n");
1868 goto out_notify_fail;
1869 }
1870 dev_dbg(dev, "has not handle, register notifier!\n");
1871 }
1872
1873 return 0;
1874
1875out_notify_fail:
1876 (void)cancel_work_sync(&priv->service_task);
1877out_read_string_fail:
1878 free_netdev(ndev);
1879 return ret;
1880}
1881
1882static int hns_nic_dev_remove(struct platform_device *pdev)
1883{
1884 struct net_device *ndev = platform_get_drvdata(pdev);
1885 struct hns_nic_priv *priv = netdev_priv(ndev);
1886
1887 if (ndev->reg_state != NETREG_UNINITIALIZED)
1888 unregister_netdev(ndev);
1889
1890 if (priv->ring_data)
1891 hns_nic_uninit_ring_data(priv);
1892 priv->ring_data = NULL;
1893
1894 if (priv->phy)
1895 phy_disconnect(priv->phy);
1896 priv->phy = NULL;
1897
1898 if (!IS_ERR_OR_NULL(priv->ae_handle))
1899 hnae_put_handle(priv->ae_handle);
1900 priv->ae_handle = NULL;
1901 if (priv->notifier_block.notifier_call)
1902 hnae_unregister_notifier(&priv->notifier_block);
1903 priv->notifier_block.notifier_call = NULL;
1904
1905 set_bit(NIC_STATE_REMOVING, &priv->state);
1906 (void)cancel_work_sync(&priv->service_task);
1907
1908 free_netdev(ndev);
1909 return 0;
1910}
1911
1912static const struct of_device_id hns_enet_of_match[] = {
1913 {.compatible = "hisilicon,hns-nic-v1",},
1914 {.compatible = "hisilicon,hns-nic-v2",},
1915 {},
1916};
1917
1918MODULE_DEVICE_TABLE(of, hns_enet_of_match);
1919
1920static struct platform_driver hns_nic_dev_driver = {
1921 .driver = {
1922 .name = "hns-nic",
b5996f11 1923 .of_match_table = hns_enet_of_match,
1924 },
1925 .probe = hns_nic_dev_probe,
1926 .remove = hns_nic_dev_remove,
1927};
1928
1929module_platform_driver(hns_nic_dev_driver);
1930
1931MODULE_DESCRIPTION("HISILICON HNS Ethernet driver");
1932MODULE_AUTHOR("Hisilicon, Inc.");
1933MODULE_LICENSE("GPL");
1934MODULE_ALIAS("platform:hns-nic");
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