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hwrng: core - Don't use a stack buffer in add_early_randomness()
[linux/fpc-iii.git] / drivers / net / ethernet / hisilicon / hns / hns_enet.c
blobdff7b60345d8e94b90a53f16d2c9caadde1b449a
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
34 #define RCB_IRQ_NOT_INITED 0
35 #define RCB_IRQ_INITED 1
36 #define HNS_BUFFER_SIZE_2048 2048
37
38 #define BD_MAX_SEND_SIZE 8191
39 #define SKB_TMP_LEN(SKB) \
40 (((SKB)->transport_header - (SKB)->mac_header) + tcp_hdrlen(SKB))
41
42 static void fill_v2_desc(struct hnae_ring *ring, void *priv,
43 int size, dma_addr_t dma, int frag_end,
44 int buf_num, enum hns_desc_type type, int mtu)
45 {
46 struct hnae_desc *desc = &ring->desc[ring->next_to_use];
47 struct hnae_desc_cb *desc_cb = &ring->desc_cb[ring->next_to_use];
48 struct iphdr *iphdr;
49 struct ipv6hdr *ipv6hdr;
50 struct sk_buff *skb;
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 /* fill port_id in the tx bd for sending management pkts */
73 hnae_set_field(bn_pid, HNSV2_TXD_PORTID_M,
74 HNSV2_TXD_PORTID_S, ring->q->handle->dport_id);
75
76 if (type == DESC_TYPE_SKB) {
77 skb = (struct sk_buff *)priv;
78
79 if (skb->ip_summed == CHECKSUM_PARTIAL) {
80 skb_reset_mac_len(skb);
81 protocol = skb->protocol;
82 ip_offset = ETH_HLEN;
83
84 if (protocol == htons(ETH_P_8021Q)) {
85 ip_offset += VLAN_HLEN;
86 protocol = vlan_get_protocol(skb);
87 skb->protocol = protocol;
88 }
89
90 if (skb->protocol == htons(ETH_P_IP)) {
91 iphdr = ip_hdr(skb);
92 hnae_set_bit(rrcfv, HNSV2_TXD_L3CS_B, 1);
93 hnae_set_bit(rrcfv, HNSV2_TXD_L4CS_B, 1);
94
95 /* check for tcp/udp header */
96 if (iphdr->protocol == IPPROTO_TCP &&
97 skb_is_gso(skb)) {
98 hnae_set_bit(tvsvsn,
99 HNSV2_TXD_TSE_B, 1);
100 l4_len = tcp_hdrlen(skb);
101 mss = skb_shinfo(skb)->gso_size;
102 paylen = skb->len - SKB_TMP_LEN(skb);
103 }
104 } else if (skb->protocol == htons(ETH_P_IPV6)) {
105 hnae_set_bit(tvsvsn, HNSV2_TXD_IPV6_B, 1);
106 ipv6hdr = ipv6_hdr(skb);
107 hnae_set_bit(rrcfv, HNSV2_TXD_L4CS_B, 1);
108
109 /* check for tcp/udp header */
110 if (ipv6hdr->nexthdr == IPPROTO_TCP &&
111 skb_is_gso(skb) && skb_is_gso_v6(skb)) {
112 hnae_set_bit(tvsvsn,
113 HNSV2_TXD_TSE_B, 1);
114 l4_len = tcp_hdrlen(skb);
115 mss = skb_shinfo(skb)->gso_size;
116 paylen = skb->len - SKB_TMP_LEN(skb);
117 }
118 }
119 desc->tx.ip_offset = ip_offset;
120 desc->tx.tse_vlan_snap_v6_sctp_nth = tvsvsn;
121 desc->tx.mss = cpu_to_le16(mss);
122 desc->tx.l4_len = l4_len;
123 desc->tx.paylen = cpu_to_le16(paylen);
124 }
125 }
126
127 hnae_set_bit(rrcfv, HNSV2_TXD_FE_B, frag_end);
128
129 desc->tx.bn_pid = bn_pid;
130 desc->tx.ra_ri_cs_fe_vld = rrcfv;
131
132 ring_ptr_move_fw(ring, next_to_use);
133 }
134
135 static const struct acpi_device_id hns_enet_acpi_match[] = {
136 { "HISI00C1", 0 },
137 { "HISI00C2", 0 },
138 { },
139 };
140 MODULE_DEVICE_TABLE(acpi, hns_enet_acpi_match);
141
142 static void fill_desc(struct hnae_ring *ring, void *priv,
143 int size, dma_addr_t dma, int frag_end,
144 int buf_num, enum hns_desc_type type, int mtu)
145 {
146 struct hnae_desc *desc = &ring->desc[ring->next_to_use];
147 struct hnae_desc_cb *desc_cb = &ring->desc_cb[ring->next_to_use];
148 struct sk_buff *skb;
149 __be16 protocol;
150 u32 ip_offset;
151 u32 asid_bufnum_pid = 0;
152 u32 flag_ipoffset = 0;
153
154 desc_cb->priv = priv;
155 desc_cb->length = size;
156 desc_cb->dma = dma;
157 desc_cb->type = type;
158
159 desc->addr = cpu_to_le64(dma);
160 desc->tx.send_size = cpu_to_le16((u16)size);
161
162 /*config bd buffer end */
163 flag_ipoffset |= 1 << HNS_TXD_VLD_B;
164
165 asid_bufnum_pid |= buf_num << HNS_TXD_BUFNUM_S;
166
167 if (type == DESC_TYPE_SKB) {
168 skb = (struct sk_buff *)priv;
169
170 if (skb->ip_summed == CHECKSUM_PARTIAL) {
171 protocol = skb->protocol;
172 ip_offset = ETH_HLEN;
173
174 /*if it is a SW VLAN check the next protocol*/
175 if (protocol == htons(ETH_P_8021Q)) {
176 ip_offset += VLAN_HLEN;
177 protocol = vlan_get_protocol(skb);
178 skb->protocol = protocol;
179 }
180
181 if (skb->protocol == htons(ETH_P_IP)) {
182 flag_ipoffset |= 1 << HNS_TXD_L3CS_B;
183 /* check for tcp/udp header */
184 flag_ipoffset |= 1 << HNS_TXD_L4CS_B;
185
186 } else if (skb->protocol == htons(ETH_P_IPV6)) {
187 /* ipv6 has not l3 cs, check for L4 header */
188 flag_ipoffset |= 1 << HNS_TXD_L4CS_B;
189 }
190
191 flag_ipoffset |= ip_offset << HNS_TXD_IPOFFSET_S;
192 }
193 }
194
195 flag_ipoffset |= frag_end << HNS_TXD_FE_B;
196
197 desc->tx.asid_bufnum_pid = cpu_to_le16(asid_bufnum_pid);
198 desc->tx.flag_ipoffset = cpu_to_le32(flag_ipoffset);
199
200 ring_ptr_move_fw(ring, next_to_use);
201 }
202
203 static void unfill_desc(struct hnae_ring *ring)
204 {
205 ring_ptr_move_bw(ring, next_to_use);
206 }
207
208 static int hns_nic_maybe_stop_tx(
209 struct sk_buff **out_skb, int *bnum, struct hnae_ring *ring)
210 {
211 struct sk_buff *skb = *out_skb;
212 struct sk_buff *new_skb = NULL;
213 int buf_num;
214
215 /* no. of segments (plus a header) */
216 buf_num = skb_shinfo(skb)->nr_frags + 1;
217
218 if (unlikely(buf_num > ring->max_desc_num_per_pkt)) {
219 if (ring_space(ring) < 1)
220 return -EBUSY;
221
222 new_skb = skb_copy(skb, GFP_ATOMIC);
223 if (!new_skb)
224 return -ENOMEM;
225
226 dev_kfree_skb_any(skb);
227 *out_skb = new_skb;
228 buf_num = 1;
229 } else if (buf_num > ring_space(ring)) {
230 return -EBUSY;
231 }
232
233 *bnum = buf_num;
234 return 0;
235 }
236
237 static int hns_nic_maybe_stop_tso(
238 struct sk_buff **out_skb, int *bnum, struct hnae_ring *ring)
239 {
240 int i;
241 int size;
242 int buf_num;
243 int frag_num;
244 struct sk_buff *skb = *out_skb;
245 struct sk_buff *new_skb = NULL;
246 struct skb_frag_struct *frag;
247
248 size = skb_headlen(skb);
249 buf_num = (size + BD_MAX_SEND_SIZE - 1) / BD_MAX_SEND_SIZE;
250
251 frag_num = skb_shinfo(skb)->nr_frags;
252 for (i = 0; i < frag_num; i++) {
253 frag = &skb_shinfo(skb)->frags[i];
254 size = skb_frag_size(frag);
255 buf_num += (size + BD_MAX_SEND_SIZE - 1) / BD_MAX_SEND_SIZE;
256 }
257
258 if (unlikely(buf_num > ring->max_desc_num_per_pkt)) {
259 buf_num = (skb->len + BD_MAX_SEND_SIZE - 1) / BD_MAX_SEND_SIZE;
260 if (ring_space(ring) < buf_num)
261 return -EBUSY;
262 /* manual split the send packet */
263 new_skb = skb_copy(skb, GFP_ATOMIC);
264 if (!new_skb)
265 return -ENOMEM;
266 dev_kfree_skb_any(skb);
267 *out_skb = new_skb;
268
269 } else if (ring_space(ring) < buf_num) {
270 return -EBUSY;
271 }
272
273 *bnum = buf_num;
274 return 0;
275 }
276
277 static void fill_tso_desc(struct hnae_ring *ring, void *priv,
278 int size, dma_addr_t dma, int frag_end,
279 int buf_num, enum hns_desc_type type, int mtu)
280 {
281 int frag_buf_num;
282 int sizeoflast;
283 int k;
284
285 frag_buf_num = (size + BD_MAX_SEND_SIZE - 1) / BD_MAX_SEND_SIZE;
286 sizeoflast = size % BD_MAX_SEND_SIZE;
287 sizeoflast = sizeoflast ? sizeoflast : BD_MAX_SEND_SIZE;
288
289 /* when the frag size is bigger than hardware, split this frag */
290 for (k = 0; k < frag_buf_num; k++)
291 fill_v2_desc(ring, priv,
292 (k == frag_buf_num - 1) ?
293 sizeoflast : BD_MAX_SEND_SIZE,
294 dma + BD_MAX_SEND_SIZE * k,
295 frag_end && (k == frag_buf_num - 1) ? 1 : 0,
296 buf_num,
297 (type == DESC_TYPE_SKB && !k) ?
298 DESC_TYPE_SKB : DESC_TYPE_PAGE,
299 mtu);
300 }
301
302 int hns_nic_net_xmit_hw(struct net_device *ndev,
303 struct sk_buff *skb,
304 struct hns_nic_ring_data *ring_data)
305 {
306 struct hns_nic_priv *priv = netdev_priv(ndev);
307 struct device *dev = priv->dev;
308 struct hnae_ring *ring = ring_data->ring;
309 struct netdev_queue *dev_queue;
310 struct skb_frag_struct *frag;
311 int buf_num;
312 int seg_num;
313 dma_addr_t dma;
314 int size, next_to_use;
315 int i;
316
317 switch (priv->ops.maybe_stop_tx(&skb, &buf_num, ring)) {
318 case -EBUSY:
319 ring->stats.tx_busy++;
320 goto out_net_tx_busy;
321 case -ENOMEM:
322 ring->stats.sw_err_cnt++;
323 netdev_err(ndev, "no memory to xmit!\n");
324 goto out_err_tx_ok;
325 default:
326 break;
327 }
328
329 /* no. of segments (plus a header) */
330 seg_num = skb_shinfo(skb)->nr_frags + 1;
331 next_to_use = ring->next_to_use;
332
333 /* fill the first part */
334 size = skb_headlen(skb);
335 dma = dma_map_single(dev, skb->data, size, DMA_TO_DEVICE);
336 if (dma_mapping_error(dev, dma)) {
337 netdev_err(ndev, "TX head DMA map failed\n");
338 ring->stats.sw_err_cnt++;
339 goto out_err_tx_ok;
340 }
341 priv->ops.fill_desc(ring, skb, size, dma, seg_num == 1 ? 1 : 0,
342 buf_num, DESC_TYPE_SKB, ndev->mtu);
343
344 /* fill the fragments */
345 for (i = 1; i < seg_num; i++) {
346 frag = &skb_shinfo(skb)->frags[i - 1];
347 size = skb_frag_size(frag);
348 dma = skb_frag_dma_map(dev, frag, 0, size, DMA_TO_DEVICE);
349 if (dma_mapping_error(dev, dma)) {
350 netdev_err(ndev, "TX frag(%d) DMA map failed\n", i);
351 ring->stats.sw_err_cnt++;
352 goto out_map_frag_fail;
353 }
354 priv->ops.fill_desc(ring, skb_frag_page(frag), size, dma,
355 seg_num - 1 == i ? 1 : 0, buf_num,
356 DESC_TYPE_PAGE, ndev->mtu);
357 }
358
359 /*complete translate all packets*/
360 dev_queue = netdev_get_tx_queue(ndev, skb->queue_mapping);
361 netdev_tx_sent_queue(dev_queue, skb->len);
362
363 wmb(); /* commit all data before submit */
364 assert(skb->queue_mapping < priv->ae_handle->q_num);
365 hnae_queue_xmit(priv->ae_handle->qs[skb->queue_mapping], buf_num);
366 ring->stats.tx_pkts++;
367 ring->stats.tx_bytes += skb->len;
368
369 return NETDEV_TX_OK;
370
371 out_map_frag_fail:
372
373 while (ring->next_to_use != next_to_use) {
374 unfill_desc(ring);
375 if (ring->next_to_use != next_to_use)
376 dma_unmap_page(dev,
377 ring->desc_cb[ring->next_to_use].dma,
378 ring->desc_cb[ring->next_to_use].length,
379 DMA_TO_DEVICE);
380 else
381 dma_unmap_single(dev,
382 ring->desc_cb[next_to_use].dma,
383 ring->desc_cb[next_to_use].length,
384 DMA_TO_DEVICE);
385 }
386
387 out_err_tx_ok:
388
389 dev_kfree_skb_any(skb);
390 return NETDEV_TX_OK;
391
392 out_net_tx_busy:
393
394 netif_stop_subqueue(ndev, skb->queue_mapping);
395
396 /* Herbert's original patch had:
397 * smp_mb__after_netif_stop_queue();
398 * but since that doesn't exist yet, just open code it.
399 */
400 smp_mb();
401 return NETDEV_TX_BUSY;
402 }
403
404 /**
405 * hns_nic_get_headlen - determine size of header for RSC/LRO/GRO/FCOE
406 * @data: pointer to the start of the headers
407 * @max: total length of section to find headers in
408 *
409 * This function is meant to determine the length of headers that will
410 * be recognized by hardware for LRO, GRO, and RSC offloads. The main
411 * motivation of doing this is to only perform one pull for IPv4 TCP
412 * packets so that we can do basic things like calculating the gso_size
413 * based on the average data per packet.
414 **/
415 static unsigned int hns_nic_get_headlen(unsigned char *data, u32 flag,
416 unsigned int max_size)
417 {
418 unsigned char *network;
419 u8 hlen;
420
421 /* this should never happen, but better safe than sorry */
422 if (max_size < ETH_HLEN)
423 return max_size;
424
425 /* initialize network frame pointer */
426 network = data;
427
428 /* set first protocol and move network header forward */
429 network += ETH_HLEN;
430
431 /* handle any vlan tag if present */
432 if (hnae_get_field(flag, HNS_RXD_VLAN_M, HNS_RXD_VLAN_S)
433 == HNS_RX_FLAG_VLAN_PRESENT) {
434 if ((typeof(max_size))(network - data) > (max_size - VLAN_HLEN))
435 return max_size;
436
437 network += VLAN_HLEN;
438 }
439
440 /* handle L3 protocols */
441 if (hnae_get_field(flag, HNS_RXD_L3ID_M, HNS_RXD_L3ID_S)
442 == HNS_RX_FLAG_L3ID_IPV4) {
443 if ((typeof(max_size))(network - data) >
444 (max_size - sizeof(struct iphdr)))
445 return max_size;
446
447 /* access ihl as a u8 to avoid unaligned access on ia64 */
448 hlen = (network[0] & 0x0F) << 2;
449
450 /* verify hlen meets minimum size requirements */
451 if (hlen < sizeof(struct iphdr))
452 return network - data;
453
454 /* record next protocol if header is present */
455 } else if (hnae_get_field(flag, HNS_RXD_L3ID_M, HNS_RXD_L3ID_S)
456 == HNS_RX_FLAG_L3ID_IPV6) {
457 if ((typeof(max_size))(network - data) >
458 (max_size - sizeof(struct ipv6hdr)))
459 return max_size;
460
461 /* record next protocol */
462 hlen = sizeof(struct ipv6hdr);
463 } else {
464 return network - data;
465 }
466
467 /* relocate pointer to start of L4 header */
468 network += hlen;
469
470 /* finally sort out TCP/UDP */
471 if (hnae_get_field(flag, HNS_RXD_L4ID_M, HNS_RXD_L4ID_S)
472 == HNS_RX_FLAG_L4ID_TCP) {
473 if ((typeof(max_size))(network - data) >
474 (max_size - sizeof(struct tcphdr)))
475 return max_size;
476
477 /* access doff as a u8 to avoid unaligned access on ia64 */
478 hlen = (network[12] & 0xF0) >> 2;
479
480 /* verify hlen meets minimum size requirements */
481 if (hlen < sizeof(struct tcphdr))
482 return network - data;
483
484 network += hlen;
485 } else if (hnae_get_field(flag, HNS_RXD_L4ID_M, HNS_RXD_L4ID_S)
486 == HNS_RX_FLAG_L4ID_UDP) {
487 if ((typeof(max_size))(network - data) >
488 (max_size - sizeof(struct udphdr)))
489 return max_size;
490
491 network += sizeof(struct udphdr);
492 }
493
494 /* If everything has gone correctly network should be the
495 * data section of the packet and will be the end of the header.
496 * If not then it probably represents the end of the last recognized
497 * header.
498 */
499 if ((typeof(max_size))(network - data) < max_size)
500 return network - data;
501 else
502 return max_size;
503 }
504
505 static void hns_nic_reuse_page(struct sk_buff *skb, int i,
506 struct hnae_ring *ring, int pull_len,
507 struct hnae_desc_cb *desc_cb)
508 {
509 struct hnae_desc *desc;
510 int truesize, size;
511 int last_offset;
512 bool twobufs;
513
514 twobufs = ((PAGE_SIZE < 8192) && hnae_buf_size(ring) == HNS_BUFFER_SIZE_2048);
515
516 desc = &ring->desc[ring->next_to_clean];
517 size = le16_to_cpu(desc->rx.size);
518
519 if (twobufs) {
520 truesize = hnae_buf_size(ring);
521 } else {
522 truesize = ALIGN(size, L1_CACHE_BYTES);
523 last_offset = hnae_page_size(ring) - hnae_buf_size(ring);
524 }
525
526 skb_add_rx_frag(skb, i, desc_cb->priv, desc_cb->page_offset + pull_len,
527 size - pull_len, truesize - pull_len);
528
529 /* avoid re-using remote pages,flag default unreuse */
530 if (unlikely(page_to_nid(desc_cb->priv) != numa_node_id()))
531 return;
532
533 if (twobufs) {
534 /* if we are only owner of page we can reuse it */
535 if (likely(page_count(desc_cb->priv) == 1)) {
536 /* flip page offset to other buffer */
537 desc_cb->page_offset ^= truesize;
538
539 desc_cb->reuse_flag = 1;
540 /* bump ref count on page before it is given*/
541 get_page(desc_cb->priv);
542 }
543 return;
544 }
545
546 /* move offset up to the next cache line */
547 desc_cb->page_offset += truesize;
548
549 if (desc_cb->page_offset <= last_offset) {
550 desc_cb->reuse_flag = 1;
551 /* bump ref count on page before it is given*/
552 get_page(desc_cb->priv);
553 }
554 }
555
556 static void get_v2rx_desc_bnum(u32 bnum_flag, int *out_bnum)
557 {
558 *out_bnum = hnae_get_field(bnum_flag,
559 HNS_RXD_BUFNUM_M, HNS_RXD_BUFNUM_S) + 1;
560 }
561
562 static void get_rx_desc_bnum(u32 bnum_flag, int *out_bnum)
563 {
564 *out_bnum = hnae_get_field(bnum_flag,
565 HNS_RXD_BUFNUM_M, HNS_RXD_BUFNUM_S);
566 }
567
568 static int hns_nic_poll_rx_skb(struct hns_nic_ring_data *ring_data,
569 struct sk_buff **out_skb, int *out_bnum)
570 {
571 struct hnae_ring *ring = ring_data->ring;
572 struct net_device *ndev = ring_data->napi.dev;
573 struct hns_nic_priv *priv = netdev_priv(ndev);
574 struct sk_buff *skb;
575 struct hnae_desc *desc;
576 struct hnae_desc_cb *desc_cb;
577 unsigned char *va;
578 int bnum, length, i;
579 int pull_len;
580 u32 bnum_flag;
581
582 desc = &ring->desc[ring->next_to_clean];
583 desc_cb = &ring->desc_cb[ring->next_to_clean];
584
585 prefetch(desc);
586
587 va = (unsigned char *)desc_cb->buf + desc_cb->page_offset;
588
589 /* prefetch first cache line of first page */
590 prefetch(va);
591 #if L1_CACHE_BYTES < 128
592 prefetch(va + L1_CACHE_BYTES);
593 #endif
594
595 skb = *out_skb = napi_alloc_skb(&ring_data->napi,
596 HNS_RX_HEAD_SIZE);
597 if (unlikely(!skb)) {
598 netdev_err(ndev, "alloc rx skb fail\n");
599 ring->stats.sw_err_cnt++;
600 return -ENOMEM;
601 }
602
603 prefetchw(skb->data);
604 length = le16_to_cpu(desc->rx.pkt_len);
605 bnum_flag = le32_to_cpu(desc->rx.ipoff_bnum_pid_flag);
606 priv->ops.get_rxd_bnum(bnum_flag, &bnum);
607 *out_bnum = bnum;
608
609 if (length <= HNS_RX_HEAD_SIZE) {
610 memcpy(__skb_put(skb, length), va, ALIGN(length, sizeof(long)));
611
612 /* we can reuse buffer as-is, just make sure it is local */
613 if (likely(page_to_nid(desc_cb->priv) == numa_node_id()))
614 desc_cb->reuse_flag = 1;
615 else /* this page cannot be reused so discard it */
616 put_page(desc_cb->priv);
617
618 ring_ptr_move_fw(ring, next_to_clean);
619
620 if (unlikely(bnum != 1)) { /* check err*/
621 *out_bnum = 1;
622 goto out_bnum_err;
623 }
624 } else {
625 ring->stats.seg_pkt_cnt++;
626
627 pull_len = hns_nic_get_headlen(va, bnum_flag, HNS_RX_HEAD_SIZE);
628 memcpy(__skb_put(skb, pull_len), va,
629 ALIGN(pull_len, sizeof(long)));
630
631 hns_nic_reuse_page(skb, 0, ring, pull_len, desc_cb);
632 ring_ptr_move_fw(ring, next_to_clean);
633
634 if (unlikely(bnum >= (int)MAX_SKB_FRAGS)) { /* check err*/
635 *out_bnum = 1;
636 goto out_bnum_err;
637 }
638 for (i = 1; i < bnum; i++) {
639 desc = &ring->desc[ring->next_to_clean];
640 desc_cb = &ring->desc_cb[ring->next_to_clean];
641
642 hns_nic_reuse_page(skb, i, ring, 0, desc_cb);
643 ring_ptr_move_fw(ring, next_to_clean);
644 }
645 }
646
647 /* check except process, free skb and jump the desc */
648 if (unlikely((!bnum) || (bnum > ring->max_desc_num_per_pkt))) {
649 out_bnum_err:
650 *out_bnum = *out_bnum ? *out_bnum : 1; /* ntc moved,cannot 0*/
651 netdev_err(ndev, "invalid bnum(%d,%d,%d,%d),%016llx,%016llx\n",
652 bnum, ring->max_desc_num_per_pkt,
653 length, (int)MAX_SKB_FRAGS,
654 ((u64 *)desc)[0], ((u64 *)desc)[1]);
655 ring->stats.err_bd_num++;
656 dev_kfree_skb_any(skb);
657 return -EDOM;
658 }
659
660 bnum_flag = le32_to_cpu(desc->rx.ipoff_bnum_pid_flag);
661
662 if (unlikely(!hnae_get_bit(bnum_flag, HNS_RXD_VLD_B))) {
663 netdev_err(ndev, "no valid bd,%016llx,%016llx\n",
664 ((u64 *)desc)[0], ((u64 *)desc)[1]);
665 ring->stats.non_vld_descs++;
666 dev_kfree_skb_any(skb);
667 return -EINVAL;
668 }
669
670 if (unlikely((!desc->rx.pkt_len) ||
671 hnae_get_bit(bnum_flag, HNS_RXD_DROP_B))) {
672 ring->stats.err_pkt_len++;
673 dev_kfree_skb_any(skb);
674 return -EFAULT;
675 }
676
677 if (unlikely(hnae_get_bit(bnum_flag, HNS_RXD_L2E_B))) {
678 ring->stats.l2_err++;
679 dev_kfree_skb_any(skb);
680 return -EFAULT;
681 }
682
683 ring->stats.rx_pkts++;
684 ring->stats.rx_bytes += skb->len;
685
686 if (unlikely(hnae_get_bit(bnum_flag, HNS_RXD_L3E_B) ||
687 hnae_get_bit(bnum_flag, HNS_RXD_L4E_B))) {
688 ring->stats.l3l4_csum_err++;
689 return 0;
690 }
691
692 skb->ip_summed = CHECKSUM_UNNECESSARY;
693
694 return 0;
695 }
696
697 static void
698 hns_nic_alloc_rx_buffers(struct hns_nic_ring_data *ring_data, int cleand_count)
699 {
700 int i, ret;
701 struct hnae_desc_cb res_cbs;
702 struct hnae_desc_cb *desc_cb;
703 struct hnae_ring *ring = ring_data->ring;
704 struct net_device *ndev = ring_data->napi.dev;
705
706 for (i = 0; i < cleand_count; i++) {
707 desc_cb = &ring->desc_cb[ring->next_to_use];
708 if (desc_cb->reuse_flag) {
709 ring->stats.reuse_pg_cnt++;
710 hnae_reuse_buffer(ring, ring->next_to_use);
711 } else {
712 ret = hnae_reserve_buffer_map(ring, &res_cbs);
713 if (ret) {
714 ring->stats.sw_err_cnt++;
715 netdev_err(ndev, "hnae reserve buffer map failed.\n");
716 break;
717 }
718 hnae_replace_buffer(ring, ring->next_to_use, &res_cbs);
719 }
720
721 ring_ptr_move_fw(ring, next_to_use);
722 }
723
724 wmb(); /* make all data has been write before submit */
725 writel_relaxed(i, ring->io_base + RCB_REG_HEAD);
726 }
727
728 /* return error number for error or number of desc left to take
729 */
730 static void hns_nic_rx_up_pro(struct hns_nic_ring_data *ring_data,
731 struct sk_buff *skb)
732 {
733 struct net_device *ndev = ring_data->napi.dev;
734
735 skb->protocol = eth_type_trans(skb, ndev);
736 (void)napi_gro_receive(&ring_data->napi, skb);
737 ndev->last_rx = jiffies;
738 }
739
740 static int hns_desc_unused(struct hnae_ring *ring)
741 {
742 int ntc = ring->next_to_clean;
743 int ntu = ring->next_to_use;
744
745 return ((ntc >= ntu) ? 0 : ring->desc_num) + ntc - ntu;
746 }
747
748 static int hns_nic_rx_poll_one(struct hns_nic_ring_data *ring_data,
749 int budget, void *v)
750 {
751 struct hnae_ring *ring = ring_data->ring;
752 struct sk_buff *skb;
753 int num, bnum;
754 #define RCB_NOF_ALLOC_RX_BUFF_ONCE 16
755 int recv_pkts, recv_bds, clean_count, err;
756 int unused_count = hns_desc_unused(ring);
757
758 num = readl_relaxed(ring->io_base + RCB_REG_FBDNUM);
759 rmb(); /* make sure num taken effect before the other data is touched */
760
761 recv_pkts = 0, recv_bds = 0, clean_count = 0;
762 num -= unused_count;
763
764 while (recv_pkts < budget && recv_bds < num) {
765 /* reuse or realloc buffers */
766 if (clean_count + unused_count >= RCB_NOF_ALLOC_RX_BUFF_ONCE) {
767 hns_nic_alloc_rx_buffers(ring_data,
768 clean_count + unused_count);
769 clean_count = 0;
770 unused_count = hns_desc_unused(ring);
771 }
772
773 /* poll one pkt */
774 err = hns_nic_poll_rx_skb(ring_data, &skb, &bnum);
775 if (unlikely(!skb)) /* this fault cannot be repaired */
776 goto out;
777
778 recv_bds += bnum;
779 clean_count += bnum;
780 if (unlikely(err)) { /* do jump the err */
781 recv_pkts++;
782 continue;
783 }
784
785 /* do update ip stack process*/
786 ((void (*)(struct hns_nic_ring_data *, struct sk_buff *))v)(
787 ring_data, skb);
788 recv_pkts++;
789 }
790
791 out:
792 /* make all data has been write before submit */
793 if (clean_count + unused_count > 0)
794 hns_nic_alloc_rx_buffers(ring_data,
795 clean_count + unused_count);
796
797 return recv_pkts;
798 }
799
800 static void hns_nic_rx_fini_pro(struct hns_nic_ring_data *ring_data)
801 {
802 struct hnae_ring *ring = ring_data->ring;
803 int num = 0;
804
805 ring_data->ring->q->handle->dev->ops->toggle_ring_irq(ring, 0);
806
807 /* for hardware bug fixed */
808 num = readl_relaxed(ring->io_base + RCB_REG_FBDNUM);
809
810 if (num > 0) {
811 ring_data->ring->q->handle->dev->ops->toggle_ring_irq(
812 ring_data->ring, 1);
813
814 napi_schedule(&ring_data->napi);
815 }
816 }
817
818 static void hns_nic_rx_fini_pro_v2(struct hns_nic_ring_data *ring_data)
819 {
820 struct hnae_ring *ring = ring_data->ring;
821 int num = 0;
822
823 num = readl_relaxed(ring->io_base + RCB_REG_FBDNUM);
824
825 if (num == 0)
826 ring_data->ring->q->handle->dev->ops->toggle_ring_irq(
827 ring, 0);
828 else
829 napi_schedule(&ring_data->napi);
830 }
831
832 static inline void hns_nic_reclaim_one_desc(struct hnae_ring *ring,
833 int *bytes, int *pkts)
834 {
835 struct hnae_desc_cb *desc_cb = &ring->desc_cb[ring->next_to_clean];
836
837 (*pkts) += (desc_cb->type == DESC_TYPE_SKB);
838 (*bytes) += desc_cb->length;
839 /* desc_cb will be cleaned, after hnae_free_buffer_detach*/
840 hnae_free_buffer_detach(ring, ring->next_to_clean);
841
842 ring_ptr_move_fw(ring, next_to_clean);
843 }
844
845 static int is_valid_clean_head(struct hnae_ring *ring, int h)
846 {
847 int u = ring->next_to_use;
848 int c = ring->next_to_clean;
849
850 if (unlikely(h > ring->desc_num))
851 return 0;
852
853 assert(u > 0 && u < ring->desc_num);
854 assert(c > 0 && c < ring->desc_num);
855 assert(u != c && h != c); /* must be checked before call this func */
856
857 return u > c ? (h > c && h <= u) : (h > c || h <= u);
858 }
859
860 /* netif_tx_lock will turn down the performance, set only when necessary */
861 #ifdef CONFIG_NET_POLL_CONTROLLER
862 #define NETIF_TX_LOCK(ndev) netif_tx_lock(ndev)
863 #define NETIF_TX_UNLOCK(ndev) netif_tx_unlock(ndev)
864 #else
865 #define NETIF_TX_LOCK(ndev)
866 #define NETIF_TX_UNLOCK(ndev)
867 #endif
868 /* reclaim all desc in one budget
869 * return error or number of desc left
870 */
871 static int hns_nic_tx_poll_one(struct hns_nic_ring_data *ring_data,
872 int budget, void *v)
873 {
874 struct hnae_ring *ring = ring_data->ring;
875 struct net_device *ndev = ring_data->napi.dev;
876 struct netdev_queue *dev_queue;
877 struct hns_nic_priv *priv = netdev_priv(ndev);
878 int head;
879 int bytes, pkts;
880
881 NETIF_TX_LOCK(ndev);
882
883 head = readl_relaxed(ring->io_base + RCB_REG_HEAD);
884 rmb(); /* make sure head is ready before touch any data */
885
886 if (is_ring_empty(ring) || head == ring->next_to_clean) {
887 NETIF_TX_UNLOCK(ndev);
888 return 0; /* no data to poll */
889 }
890
891 if (!is_valid_clean_head(ring, head)) {
892 netdev_err(ndev, "wrong head (%d, %d-%d)\n", head,
893 ring->next_to_use, ring->next_to_clean);
894 ring->stats.io_err_cnt++;
895 NETIF_TX_UNLOCK(ndev);
896 return -EIO;
897 }
898
899 bytes = 0;
900 pkts = 0;
901 while (head != ring->next_to_clean) {
902 hns_nic_reclaim_one_desc(ring, &bytes, &pkts);
903 /* issue prefetch for next Tx descriptor */
904 prefetch(&ring->desc_cb[ring->next_to_clean]);
905 }
906
907 NETIF_TX_UNLOCK(ndev);
908
909 dev_queue = netdev_get_tx_queue(ndev, ring_data->queue_index);
910 netdev_tx_completed_queue(dev_queue, pkts, bytes);
911
912 if (unlikely(priv->link && !netif_carrier_ok(ndev)))
913 netif_carrier_on(ndev);
914
915 if (unlikely(pkts && netif_carrier_ok(ndev) &&
916 (ring_space(ring) >= ring->max_desc_num_per_pkt * 2))) {
917 /* Make sure that anybody stopping the queue after this
918 * sees the new next_to_clean.
919 */
920 smp_mb();
921 if (netif_tx_queue_stopped(dev_queue) &&
922 !test_bit(NIC_STATE_DOWN, &priv->state)) {
923 netif_tx_wake_queue(dev_queue);
924 ring->stats.restart_queue++;
925 }
926 }
927 return 0;
928 }
929
930 static void hns_nic_tx_fini_pro(struct hns_nic_ring_data *ring_data)
931 {
932 struct hnae_ring *ring = ring_data->ring;
933 int head;
934
935 ring_data->ring->q->handle->dev->ops->toggle_ring_irq(ring, 0);
936
937 head = readl_relaxed(ring->io_base + RCB_REG_HEAD);
938
939 if (head != ring->next_to_clean) {
940 ring_data->ring->q->handle->dev->ops->toggle_ring_irq(
941 ring_data->ring, 1);
942
943 napi_schedule(&ring_data->napi);
944 }
945 }
946
947 static void hns_nic_tx_fini_pro_v2(struct hns_nic_ring_data *ring_data)
948 {
949 struct hnae_ring *ring = ring_data->ring;
950 int head = readl_relaxed(ring->io_base + RCB_REG_HEAD);
951
952 if (head == ring->next_to_clean)
953 ring_data->ring->q->handle->dev->ops->toggle_ring_irq(
954 ring, 0);
955 else
956 napi_schedule(&ring_data->napi);
957 }
958
959 static void hns_nic_tx_clr_all_bufs(struct hns_nic_ring_data *ring_data)
960 {
961 struct hnae_ring *ring = ring_data->ring;
962 struct net_device *ndev = ring_data->napi.dev;
963 struct netdev_queue *dev_queue;
964 int head;
965 int bytes, pkts;
966
967 NETIF_TX_LOCK(ndev);
968
969 head = ring->next_to_use; /* ntu :soft setted ring position*/
970 bytes = 0;
971 pkts = 0;
972 while (head != ring->next_to_clean)
973 hns_nic_reclaim_one_desc(ring, &bytes, &pkts);
974
975 NETIF_TX_UNLOCK(ndev);
976
977 dev_queue = netdev_get_tx_queue(ndev, ring_data->queue_index);
978 netdev_tx_reset_queue(dev_queue);
979 }
980
981 static int hns_nic_common_poll(struct napi_struct *napi, int budget)
982 {
983 struct hns_nic_ring_data *ring_data =
984 container_of(napi, struct hns_nic_ring_data, napi);
985 int clean_complete = ring_data->poll_one(
986 ring_data, budget, ring_data->ex_process);
987
988 if (clean_complete >= 0 && clean_complete < budget) {
989 napi_complete(napi);
990 ring_data->fini_process(ring_data);
991 return 0;
992 }
993
994 return clean_complete;
995 }
996
997 static irqreturn_t hns_irq_handle(int irq, void *dev)
998 {
999 struct hns_nic_ring_data *ring_data = (struct hns_nic_ring_data *)dev;
1000
1001 ring_data->ring->q->handle->dev->ops->toggle_ring_irq(
1002 ring_data->ring, 1);
1003 napi_schedule(&ring_data->napi);
1004
1005 return IRQ_HANDLED;
1006 }
1007
1008 /**
1009 *hns_nic_adjust_link - adjust net work mode by the phy stat or new param
1010 *@ndev: net device
1011 */
1012 static void hns_nic_adjust_link(struct net_device *ndev)
1013 {
1014 struct hns_nic_priv *priv = netdev_priv(ndev);
1015 struct hnae_handle *h = priv->ae_handle;
1016 int state = 1;
1017
1018 if (ndev->phydev) {
1019 h->dev->ops->adjust_link(h, ndev->phydev->speed,
1020 ndev->phydev->duplex);
1021 state = ndev->phydev->link;
1022 }
1023 state = state && h->dev->ops->get_status(h);
1024
1025 if (state != priv->link) {
1026 if (state) {
1027 netif_carrier_on(ndev);
1028 netif_tx_wake_all_queues(ndev);
1029 netdev_info(ndev, "link up\n");
1030 } else {
1031 netif_carrier_off(ndev);
1032 netdev_info(ndev, "link down\n");
1033 }
1034 priv->link = state;
1035 }
1036 }
1037
1038 /**
1039 *hns_nic_init_phy - init phy
1040 *@ndev: net device
1041 *@h: ae handle
1042 * Return 0 on success, negative on failure
1043 */
1044 int hns_nic_init_phy(struct net_device *ndev, struct hnae_handle *h)
1045 {
1046 struct phy_device *phy_dev = h->phy_dev;
1047 int ret;
1048
1049 if (!h->phy_dev)
1050 return 0;
1051
1052 if (h->phy_if != PHY_INTERFACE_MODE_XGMII) {
1053 phy_dev->dev_flags = 0;
1054
1055 ret = phy_connect_direct(ndev, phy_dev, hns_nic_adjust_link,
1056 h->phy_if);
1057 } else {
1058 ret = phy_attach_direct(ndev, phy_dev, 0, h->phy_if);
1059 }
1060 if (unlikely(ret))
1061 return -ENODEV;
1062
1063 phy_dev->supported &= h->if_support;
1064 phy_dev->advertising = phy_dev->supported;
1065
1066 if (h->phy_if == PHY_INTERFACE_MODE_XGMII)
1067 phy_dev->autoneg = false;
1068
1069 return 0;
1070 }
1071
1072 static int hns_nic_ring_open(struct net_device *netdev, int idx)
1073 {
1074 struct hns_nic_priv *priv = netdev_priv(netdev);
1075 struct hnae_handle *h = priv->ae_handle;
1076
1077 napi_enable(&priv->ring_data[idx].napi);
1078
1079 enable_irq(priv->ring_data[idx].ring->irq);
1080 h->dev->ops->toggle_ring_irq(priv->ring_data[idx].ring, 0);
1081
1082 return 0;
1083 }
1084
1085 static int hns_nic_net_set_mac_address(struct net_device *ndev, void *p)
1086 {
1087 struct hns_nic_priv *priv = netdev_priv(ndev);
1088 struct hnae_handle *h = priv->ae_handle;
1089 struct sockaddr *mac_addr = p;
1090 int ret;
1091
1092 if (!mac_addr || !is_valid_ether_addr((const u8 *)mac_addr->sa_data))
1093 return -EADDRNOTAVAIL;
1094
1095 ret = h->dev->ops->set_mac_addr(h, mac_addr->sa_data);
1096 if (ret) {
1097 netdev_err(ndev, "set_mac_address fail, ret=%d!\n", ret);
1098 return ret;
1099 }
1100
1101 memcpy(ndev->dev_addr, mac_addr->sa_data, ndev->addr_len);
1102
1103 return 0;
1104 }
1105
1106 void hns_nic_update_stats(struct net_device *netdev)
1107 {
1108 struct hns_nic_priv *priv = netdev_priv(netdev);
1109 struct hnae_handle *h = priv->ae_handle;
1110
1111 h->dev->ops->update_stats(h, &netdev->stats);
1112 }
1113
1114 /* set mac addr if it is configed. or leave it to the AE driver */
1115 static void hns_init_mac_addr(struct net_device *ndev)
1116 {
1117 struct hns_nic_priv *priv = netdev_priv(ndev);
1118
1119 if (!device_get_mac_address(priv->dev, ndev->dev_addr, ETH_ALEN)) {
1120 eth_hw_addr_random(ndev);
1121 dev_warn(priv->dev, "No valid mac, use random mac %pM",
1122 ndev->dev_addr);
1123 }
1124 }
1125
1126 static void hns_nic_ring_close(struct net_device *netdev, int idx)
1127 {
1128 struct hns_nic_priv *priv = netdev_priv(netdev);
1129 struct hnae_handle *h = priv->ae_handle;
1130
1131 h->dev->ops->toggle_ring_irq(priv->ring_data[idx].ring, 1);
1132 disable_irq(priv->ring_data[idx].ring->irq);
1133
1134 napi_disable(&priv->ring_data[idx].napi);
1135 }
1136
1137 static void hns_set_irq_affinity(struct hns_nic_priv *priv)
1138 {
1139 struct hnae_handle *h = priv->ae_handle;
1140 struct hns_nic_ring_data *rd;
1141 int i;
1142 int cpu;
1143 cpumask_t mask;
1144
1145 /*diffrent irq banlance for 16core and 32core*/
1146 if (h->q_num == num_possible_cpus()) {
1147 for (i = 0; i < h->q_num * 2; i++) {
1148 rd = &priv->ring_data[i];
1149 if (cpu_online(rd->queue_index)) {
1150 cpumask_clear(&mask);
1151 cpu = rd->queue_index;
1152 cpumask_set_cpu(cpu, &mask);
1153 (void)irq_set_affinity_hint(rd->ring->irq,
1154 &mask);
1155 }
1156 }
1157 } else {
1158 for (i = 0; i < h->q_num; i++) {
1159 rd = &priv->ring_data[i];
1160 if (cpu_online(rd->queue_index * 2)) {
1161 cpumask_clear(&mask);
1162 cpu = rd->queue_index * 2;
1163 cpumask_set_cpu(cpu, &mask);
1164 (void)irq_set_affinity_hint(rd->ring->irq,
1165 &mask);
1166 }
1167 }
1168
1169 for (i = h->q_num; i < h->q_num * 2; i++) {
1170 rd = &priv->ring_data[i];
1171 if (cpu_online(rd->queue_index * 2 + 1)) {
1172 cpumask_clear(&mask);
1173 cpu = rd->queue_index * 2 + 1;
1174 cpumask_set_cpu(cpu, &mask);
1175 (void)irq_set_affinity_hint(rd->ring->irq,
1176 &mask);
1177 }
1178 }
1179 }
1180 }
1181
1182 static int hns_nic_init_irq(struct hns_nic_priv *priv)
1183 {
1184 struct hnae_handle *h = priv->ae_handle;
1185 struct hns_nic_ring_data *rd;
1186 int i;
1187 int ret;
1188
1189 for (i = 0; i < h->q_num * 2; i++) {
1190 rd = &priv->ring_data[i];
1191
1192 if (rd->ring->irq_init_flag == RCB_IRQ_INITED)
1193 break;
1194
1195 snprintf(rd->ring->ring_name, RCB_RING_NAME_LEN,
1196 "%s-%s%d", priv->netdev->name,
1197 (i < h->q_num ? "tx" : "rx"), rd->queue_index);
1198
1199 rd->ring->ring_name[RCB_RING_NAME_LEN - 1] = '\0';
1200
1201 ret = request_irq(rd->ring->irq,
1202 hns_irq_handle, 0, rd->ring->ring_name, rd);
1203 if (ret) {
1204 netdev_err(priv->netdev, "request irq(%d) fail\n",
1205 rd->ring->irq);
1206 return ret;
1207 }
1208 disable_irq(rd->ring->irq);
1209 rd->ring->irq_init_flag = RCB_IRQ_INITED;
1210 }
1211
1212 /*set cpu affinity*/
1213 hns_set_irq_affinity(priv);
1214
1215 return 0;
1216 }
1217
1218 static int hns_nic_net_up(struct net_device *ndev)
1219 {
1220 struct hns_nic_priv *priv = netdev_priv(ndev);
1221 struct hnae_handle *h = priv->ae_handle;
1222 int i, j;
1223 int ret;
1224
1225 ret = hns_nic_init_irq(priv);
1226 if (ret != 0) {
1227 netdev_err(ndev, "hns init irq failed! ret=%d\n", ret);
1228 return ret;
1229 }
1230
1231 for (i = 0; i < h->q_num * 2; i++) {
1232 ret = hns_nic_ring_open(ndev, i);
1233 if (ret)
1234 goto out_has_some_queues;
1235 }
1236
1237 ret = h->dev->ops->set_mac_addr(h, ndev->dev_addr);
1238 if (ret)
1239 goto out_set_mac_addr_err;
1240
1241 ret = h->dev->ops->start ? h->dev->ops->start(h) : 0;
1242 if (ret)
1243 goto out_start_err;
1244
1245 if (ndev->phydev)
1246 phy_start(ndev->phydev);
1247
1248 clear_bit(NIC_STATE_DOWN, &priv->state);
1249 (void)mod_timer(&priv->service_timer, jiffies + SERVICE_TIMER_HZ);
1250
1251 return 0;
1252
1253 out_start_err:
1254 netif_stop_queue(ndev);
1255 out_set_mac_addr_err:
1256 out_has_some_queues:
1257 for (j = i - 1; j >= 0; j--)
1258 hns_nic_ring_close(ndev, j);
1259
1260 set_bit(NIC_STATE_DOWN, &priv->state);
1261
1262 return ret;
1263 }
1264
1265 static void hns_nic_net_down(struct net_device *ndev)
1266 {
1267 int i;
1268 struct hnae_ae_ops *ops;
1269 struct hns_nic_priv *priv = netdev_priv(ndev);
1270
1271 if (test_and_set_bit(NIC_STATE_DOWN, &priv->state))
1272 return;
1273
1274 (void)del_timer_sync(&priv->service_timer);
1275 netif_tx_stop_all_queues(ndev);
1276 netif_carrier_off(ndev);
1277 netif_tx_disable(ndev);
1278 priv->link = 0;
1279
1280 if (ndev->phydev)
1281 phy_stop(ndev->phydev);
1282
1283 ops = priv->ae_handle->dev->ops;
1284
1285 if (ops->stop)
1286 ops->stop(priv->ae_handle);
1287
1288 netif_tx_stop_all_queues(ndev);
1289
1290 for (i = priv->ae_handle->q_num - 1; i >= 0; i--) {
1291 hns_nic_ring_close(ndev, i);
1292 hns_nic_ring_close(ndev, i + priv->ae_handle->q_num);
1293
1294 /* clean tx buffers*/
1295 hns_nic_tx_clr_all_bufs(priv->ring_data + i);
1296 }
1297 }
1298
1299 void hns_nic_net_reset(struct net_device *ndev)
1300 {
1301 struct hns_nic_priv *priv = netdev_priv(ndev);
1302 struct hnae_handle *handle = priv->ae_handle;
1303
1304 while (test_and_set_bit(NIC_STATE_RESETTING, &priv->state))
1305 usleep_range(1000, 2000);
1306
1307 (void)hnae_reinit_handle(handle);
1308
1309 clear_bit(NIC_STATE_RESETTING, &priv->state);
1310 }
1311
1312 void hns_nic_net_reinit(struct net_device *netdev)
1313 {
1314 struct hns_nic_priv *priv = netdev_priv(netdev);
1315
1316 netif_trans_update(priv->netdev);
1317 while (test_and_set_bit(NIC_STATE_REINITING, &priv->state))
1318 usleep_range(1000, 2000);
1319
1320 hns_nic_net_down(netdev);
1321 hns_nic_net_reset(netdev);
1322 (void)hns_nic_net_up(netdev);
1323 clear_bit(NIC_STATE_REINITING, &priv->state);
1324 }
1325
1326 static int hns_nic_net_open(struct net_device *ndev)
1327 {
1328 struct hns_nic_priv *priv = netdev_priv(ndev);
1329 struct hnae_handle *h = priv->ae_handle;
1330 int ret;
1331
1332 if (test_bit(NIC_STATE_TESTING, &priv->state))
1333 return -EBUSY;
1334
1335 priv->link = 0;
1336 netif_carrier_off(ndev);
1337
1338 ret = netif_set_real_num_tx_queues(ndev, h->q_num);
1339 if (ret < 0) {
1340 netdev_err(ndev, "netif_set_real_num_tx_queues fail, ret=%d!\n",
1341 ret);
1342 return ret;
1343 }
1344
1345 ret = netif_set_real_num_rx_queues(ndev, h->q_num);
1346 if (ret < 0) {
1347 netdev_err(ndev,
1348 "netif_set_real_num_rx_queues fail, ret=%d!\n", ret);
1349 return ret;
1350 }
1351
1352 ret = hns_nic_net_up(ndev);
1353 if (ret) {
1354 netdev_err(ndev,
1355 "hns net up fail, ret=%d!\n", ret);
1356 return ret;
1357 }
1358
1359 return 0;
1360 }
1361
1362 static int hns_nic_net_stop(struct net_device *ndev)
1363 {
1364 hns_nic_net_down(ndev);
1365
1366 return 0;
1367 }
1368
1369 static void hns_tx_timeout_reset(struct hns_nic_priv *priv);
1370 static void hns_nic_net_timeout(struct net_device *ndev)
1371 {
1372 struct hns_nic_priv *priv = netdev_priv(ndev);
1373
1374 hns_tx_timeout_reset(priv);
1375 }
1376
1377 static int hns_nic_do_ioctl(struct net_device *netdev, struct ifreq *ifr,
1378 int cmd)
1379 {
1380 struct phy_device *phy_dev = netdev->phydev;
1381
1382 if (!netif_running(netdev))
1383 return -EINVAL;
1384
1385 if (!phy_dev)
1386 return -ENOTSUPP;
1387
1388 return phy_mii_ioctl(phy_dev, ifr, cmd);
1389 }
1390
1391 /* use only for netconsole to poll with the device without interrupt */
1392 #ifdef CONFIG_NET_POLL_CONTROLLER
1393 void hns_nic_poll_controller(struct net_device *ndev)
1394 {
1395 struct hns_nic_priv *priv = netdev_priv(ndev);
1396 unsigned long flags;
1397 int i;
1398
1399 local_irq_save(flags);
1400 for (i = 0; i < priv->ae_handle->q_num * 2; i++)
1401 napi_schedule(&priv->ring_data[i].napi);
1402 local_irq_restore(flags);
1403 }
1404 #endif
1405
1406 static netdev_tx_t hns_nic_net_xmit(struct sk_buff *skb,
1407 struct net_device *ndev)
1408 {
1409 struct hns_nic_priv *priv = netdev_priv(ndev);
1410 int ret;
1411
1412 assert(skb->queue_mapping < ndev->ae_handle->q_num);
1413 ret = hns_nic_net_xmit_hw(ndev, skb,
1414 &tx_ring_data(priv, skb->queue_mapping));
1415 if (ret == NETDEV_TX_OK) {
1416 netif_trans_update(ndev);
1417 ndev->stats.tx_bytes += skb->len;
1418 ndev->stats.tx_packets++;
1419 }
1420 return (netdev_tx_t)ret;
1421 }
1422
1423 static int hns_nic_change_mtu(struct net_device *ndev, int new_mtu)
1424 {
1425 struct hns_nic_priv *priv = netdev_priv(ndev);
1426 struct hnae_handle *h = priv->ae_handle;
1427 int ret;
1428
1429 /* MTU < 68 is an error and causes problems on some kernels */
1430 if (new_mtu < 68)
1431 return -EINVAL;
1432
1433 if (!h->dev->ops->set_mtu)
1434 return -ENOTSUPP;
1435
1436 if (netif_running(ndev)) {
1437 (void)hns_nic_net_stop(ndev);
1438 msleep(100);
1439
1440 ret = h->dev->ops->set_mtu(h, new_mtu);
1441 if (ret)
1442 netdev_err(ndev, "set mtu fail, return value %d\n",
1443 ret);
1444
1445 if (hns_nic_net_open(ndev))
1446 netdev_err(ndev, "hns net open fail\n");
1447 } else {
1448 ret = h->dev->ops->set_mtu(h, new_mtu);
1449 }
1450
1451 if (!ret)
1452 ndev->mtu = new_mtu;
1453
1454 return ret;
1455 }
1456
1457 static int hns_nic_set_features(struct net_device *netdev,
1458 netdev_features_t features)
1459 {
1460 struct hns_nic_priv *priv = netdev_priv(netdev);
1461
1462 switch (priv->enet_ver) {
1463 case AE_VERSION_1:
1464 if (features & (NETIF_F_TSO | NETIF_F_TSO6))
1465 netdev_info(netdev, "enet v1 do not support tso!\n");
1466 break;
1467 default:
1468 if (features & (NETIF_F_TSO | NETIF_F_TSO6)) {
1469 priv->ops.fill_desc = fill_tso_desc;
1470 priv->ops.maybe_stop_tx = hns_nic_maybe_stop_tso;
1471 /* The chip only support 7*4096 */
1472 netif_set_gso_max_size(netdev, 7 * 4096);
1473 } else {
1474 priv->ops.fill_desc = fill_v2_desc;
1475 priv->ops.maybe_stop_tx = hns_nic_maybe_stop_tx;
1476 }
1477 break;
1478 }
1479 netdev->features = features;
1480 return 0;
1481 }
1482
1483 static netdev_features_t hns_nic_fix_features(
1484 struct net_device *netdev, netdev_features_t features)
1485 {
1486 struct hns_nic_priv *priv = netdev_priv(netdev);
1487
1488 switch (priv->enet_ver) {
1489 case AE_VERSION_1:
1490 features &= ~(NETIF_F_TSO | NETIF_F_TSO6 |
1491 NETIF_F_HW_VLAN_CTAG_FILTER);
1492 break;
1493 default:
1494 break;
1495 }
1496 return features;
1497 }
1498
1499 /**
1500 * nic_set_multicast_list - set mutl mac address
1501 * @netdev: net device
1502 * @p: mac address
1503 *
1504 * return void
1505 */
1506 void hns_set_multicast_list(struct net_device *ndev)
1507 {
1508 struct hns_nic_priv *priv = netdev_priv(ndev);
1509 struct hnae_handle *h = priv->ae_handle;
1510 struct netdev_hw_addr *ha = NULL;
1511
1512 if (!h) {
1513 netdev_err(ndev, "hnae handle is null\n");
1514 return;
1515 }
1516
1517 if (h->dev->ops->set_mc_addr) {
1518 netdev_for_each_mc_addr(ha, ndev)
1519 if (h->dev->ops->set_mc_addr(h, ha->addr))
1520 netdev_err(ndev, "set multicast fail\n");
1521 }
1522 }
1523
1524 void hns_nic_set_rx_mode(struct net_device *ndev)
1525 {
1526 struct hns_nic_priv *priv = netdev_priv(ndev);
1527 struct hnae_handle *h = priv->ae_handle;
1528
1529 if (h->dev->ops->set_promisc_mode) {
1530 if (ndev->flags & IFF_PROMISC)
1531 h->dev->ops->set_promisc_mode(h, 1);
1532 else
1533 h->dev->ops->set_promisc_mode(h, 0);
1534 }
1535
1536 hns_set_multicast_list(ndev);
1537 }
1538
1539 struct rtnl_link_stats64 *hns_nic_get_stats64(struct net_device *ndev,
1540 struct rtnl_link_stats64 *stats)
1541 {
1542 int idx = 0;
1543 u64 tx_bytes = 0;
1544 u64 rx_bytes = 0;
1545 u64 tx_pkts = 0;
1546 u64 rx_pkts = 0;
1547 struct hns_nic_priv *priv = netdev_priv(ndev);
1548 struct hnae_handle *h = priv->ae_handle;
1549
1550 for (idx = 0; idx < h->q_num; idx++) {
1551 tx_bytes += h->qs[idx]->tx_ring.stats.tx_bytes;
1552 tx_pkts += h->qs[idx]->tx_ring.stats.tx_pkts;
1553 rx_bytes += h->qs[idx]->rx_ring.stats.rx_bytes;
1554 rx_pkts += h->qs[idx]->rx_ring.stats.rx_pkts;
1555 }
1556
1557 stats->tx_bytes = tx_bytes;
1558 stats->tx_packets = tx_pkts;
1559 stats->rx_bytes = rx_bytes;
1560 stats->rx_packets = rx_pkts;
1561
1562 stats->rx_errors = ndev->stats.rx_errors;
1563 stats->multicast = ndev->stats.multicast;
1564 stats->rx_length_errors = ndev->stats.rx_length_errors;
1565 stats->rx_crc_errors = ndev->stats.rx_crc_errors;
1566 stats->rx_missed_errors = ndev->stats.rx_missed_errors;
1567
1568 stats->tx_errors = ndev->stats.tx_errors;
1569 stats->rx_dropped = ndev->stats.rx_dropped;
1570 stats->tx_dropped = ndev->stats.tx_dropped;
1571 stats->collisions = ndev->stats.collisions;
1572 stats->rx_over_errors = ndev->stats.rx_over_errors;
1573 stats->rx_frame_errors = ndev->stats.rx_frame_errors;
1574 stats->rx_fifo_errors = ndev->stats.rx_fifo_errors;
1575 stats->tx_aborted_errors = ndev->stats.tx_aborted_errors;
1576 stats->tx_carrier_errors = ndev->stats.tx_carrier_errors;
1577 stats->tx_fifo_errors = ndev->stats.tx_fifo_errors;
1578 stats->tx_heartbeat_errors = ndev->stats.tx_heartbeat_errors;
1579 stats->tx_window_errors = ndev->stats.tx_window_errors;
1580 stats->rx_compressed = ndev->stats.rx_compressed;
1581 stats->tx_compressed = ndev->stats.tx_compressed;
1582
1583 return stats;
1584 }
1585
1586 static u16
1587 hns_nic_select_queue(struct net_device *ndev, struct sk_buff *skb,
1588 void *accel_priv, select_queue_fallback_t fallback)
1589 {
1590 struct ethhdr *eth_hdr = (struct ethhdr *)skb->data;
1591 struct hns_nic_priv *priv = netdev_priv(ndev);
1592
1593 /* fix hardware broadcast/multicast packets queue loopback */
1594 if (!AE_IS_VER1(priv->enet_ver) &&
1595 is_multicast_ether_addr(eth_hdr->h_dest))
1596 return 0;
1597 else
1598 return fallback(ndev, skb);
1599 }
1600
1601 static const struct net_device_ops hns_nic_netdev_ops = {
1602 .ndo_open = hns_nic_net_open,
1603 .ndo_stop = hns_nic_net_stop,
1604 .ndo_start_xmit = hns_nic_net_xmit,
1605 .ndo_tx_timeout = hns_nic_net_timeout,
1606 .ndo_set_mac_address = hns_nic_net_set_mac_address,
1607 .ndo_change_mtu = hns_nic_change_mtu,
1608 .ndo_do_ioctl = hns_nic_do_ioctl,
1609 .ndo_set_features = hns_nic_set_features,
1610 .ndo_fix_features = hns_nic_fix_features,
1611 .ndo_get_stats64 = hns_nic_get_stats64,
1612 #ifdef CONFIG_NET_POLL_CONTROLLER
1613 .ndo_poll_controller = hns_nic_poll_controller,
1614 #endif
1615 .ndo_set_rx_mode = hns_nic_set_rx_mode,
1616 .ndo_select_queue = hns_nic_select_queue,
1617 };
1618
1619 static void hns_nic_update_link_status(struct net_device *netdev)
1620 {
1621 struct hns_nic_priv *priv = netdev_priv(netdev);
1622
1623 struct hnae_handle *h = priv->ae_handle;
1624
1625 if (h->phy_dev) {
1626 if (h->phy_if != PHY_INTERFACE_MODE_XGMII)
1627 return;
1628
1629 (void)genphy_read_status(h->phy_dev);
1630 }
1631 hns_nic_adjust_link(netdev);
1632 }
1633
1634 /* for dumping key regs*/
1635 static void hns_nic_dump(struct hns_nic_priv *priv)
1636 {
1637 struct hnae_handle *h = priv->ae_handle;
1638 struct hnae_ae_ops *ops = h->dev->ops;
1639 u32 *data, reg_num, i;
1640
1641 if (ops->get_regs_len && ops->get_regs) {
1642 reg_num = ops->get_regs_len(priv->ae_handle);
1643 reg_num = (reg_num + 3ul) & ~3ul;
1644 data = kcalloc(reg_num, sizeof(u32), GFP_KERNEL);
1645 if (data) {
1646 ops->get_regs(priv->ae_handle, data);
1647 for (i = 0; i < reg_num; i += 4)
1648 pr_info("0x%08x: 0x%08x 0x%08x 0x%08x 0x%08x\n",
1649 i, data[i], data[i + 1],
1650 data[i + 2], data[i + 3]);
1651 kfree(data);
1652 }
1653 }
1654
1655 for (i = 0; i < h->q_num; i++) {
1656 pr_info("tx_queue%d_next_to_clean:%d\n",
1657 i, h->qs[i]->tx_ring.next_to_clean);
1658 pr_info("tx_queue%d_next_to_use:%d\n",
1659 i, h->qs[i]->tx_ring.next_to_use);
1660 pr_info("rx_queue%d_next_to_clean:%d\n",
1661 i, h->qs[i]->rx_ring.next_to_clean);
1662 pr_info("rx_queue%d_next_to_use:%d\n",
1663 i, h->qs[i]->rx_ring.next_to_use);
1664 }
1665 }
1666
1667 /* for resetting subtask */
1668 static void hns_nic_reset_subtask(struct hns_nic_priv *priv)
1669 {
1670 enum hnae_port_type type = priv->ae_handle->port_type;
1671
1672 if (!test_bit(NIC_STATE2_RESET_REQUESTED, &priv->state))
1673 return;
1674 clear_bit(NIC_STATE2_RESET_REQUESTED, &priv->state);
1675
1676 /* If we're already down, removing or resetting, just bail */
1677 if (test_bit(NIC_STATE_DOWN, &priv->state) ||
1678 test_bit(NIC_STATE_REMOVING, &priv->state) ||
1679 test_bit(NIC_STATE_RESETTING, &priv->state))
1680 return;
1681
1682 hns_nic_dump(priv);
1683 netdev_info(priv->netdev, "try to reset %s port!\n",
1684 (type == HNAE_PORT_DEBUG ? "debug" : "service"));
1685
1686 rtnl_lock();
1687 /* put off any impending NetWatchDogTimeout */
1688 netif_trans_update(priv->netdev);
1689
1690 if (type == HNAE_PORT_DEBUG) {
1691 hns_nic_net_reinit(priv->netdev);
1692 } else {
1693 netif_carrier_off(priv->netdev);
1694 netif_tx_disable(priv->netdev);
1695 }
1696 rtnl_unlock();
1697 }
1698
1699 /* for doing service complete*/
1700 static void hns_nic_service_event_complete(struct hns_nic_priv *priv)
1701 {
1702 WARN_ON(!test_bit(NIC_STATE_SERVICE_SCHED, &priv->state));
1703
1704 smp_mb__before_atomic();
1705 clear_bit(NIC_STATE_SERVICE_SCHED, &priv->state);
1706 }
1707
1708 static void hns_nic_service_task(struct work_struct *work)
1709 {
1710 struct hns_nic_priv *priv
1711 = container_of(work, struct hns_nic_priv, service_task);
1712 struct hnae_handle *h = priv->ae_handle;
1713
1714 hns_nic_update_link_status(priv->netdev);
1715 h->dev->ops->update_led_status(h);
1716 hns_nic_update_stats(priv->netdev);
1717
1718 hns_nic_reset_subtask(priv);
1719 hns_nic_service_event_complete(priv);
1720 }
1721
1722 static void hns_nic_task_schedule(struct hns_nic_priv *priv)
1723 {
1724 if (!test_bit(NIC_STATE_DOWN, &priv->state) &&
1725 !test_bit(NIC_STATE_REMOVING, &priv->state) &&
1726 !test_and_set_bit(NIC_STATE_SERVICE_SCHED, &priv->state))
1727 (void)schedule_work(&priv->service_task);
1728 }
1729
1730 static void hns_nic_service_timer(unsigned long data)
1731 {
1732 struct hns_nic_priv *priv = (struct hns_nic_priv *)data;
1733
1734 (void)mod_timer(&priv->service_timer, jiffies + SERVICE_TIMER_HZ);
1735
1736 hns_nic_task_schedule(priv);
1737 }
1738
1739 /**
1740 * hns_tx_timeout_reset - initiate reset due to Tx timeout
1741 * @priv: driver private struct
1742 **/
1743 static void hns_tx_timeout_reset(struct hns_nic_priv *priv)
1744 {
1745 /* Do the reset outside of interrupt context */
1746 if (!test_bit(NIC_STATE_DOWN, &priv->state)) {
1747 set_bit(NIC_STATE2_RESET_REQUESTED, &priv->state);
1748 netdev_warn(priv->netdev,
1749 "initiating reset due to tx timeout(%llu,0x%lx)\n",
1750 priv->tx_timeout_count, priv->state);
1751 priv->tx_timeout_count++;
1752 hns_nic_task_schedule(priv);
1753 }
1754 }
1755
1756 static int hns_nic_init_ring_data(struct hns_nic_priv *priv)
1757 {
1758 struct hnae_handle *h = priv->ae_handle;
1759 struct hns_nic_ring_data *rd;
1760 bool is_ver1 = AE_IS_VER1(priv->enet_ver);
1761 int i;
1762
1763 if (h->q_num > NIC_MAX_Q_PER_VF) {
1764 netdev_err(priv->netdev, "too much queue (%d)\n", h->q_num);
1765 return -EINVAL;
1766 }
1767
1768 priv->ring_data = kzalloc(h->q_num * sizeof(*priv->ring_data) * 2,
1769 GFP_KERNEL);
1770 if (!priv->ring_data)
1771 return -ENOMEM;
1772
1773 for (i = 0; i < h->q_num; i++) {
1774 rd = &priv->ring_data[i];
1775 rd->queue_index = i;
1776 rd->ring = &h->qs[i]->tx_ring;
1777 rd->poll_one = hns_nic_tx_poll_one;
1778 rd->fini_process = is_ver1 ? hns_nic_tx_fini_pro :
1779 hns_nic_tx_fini_pro_v2;
1780
1781 netif_napi_add(priv->netdev, &rd->napi,
1782 hns_nic_common_poll, NIC_TX_CLEAN_MAX_NUM);
1783 rd->ring->irq_init_flag = RCB_IRQ_NOT_INITED;
1784 }
1785 for (i = h->q_num; i < h->q_num * 2; i++) {
1786 rd = &priv->ring_data[i];
1787 rd->queue_index = i - h->q_num;
1788 rd->ring = &h->qs[i - h->q_num]->rx_ring;
1789 rd->poll_one = hns_nic_rx_poll_one;
1790 rd->ex_process = hns_nic_rx_up_pro;
1791 rd->fini_process = is_ver1 ? hns_nic_rx_fini_pro :
1792 hns_nic_rx_fini_pro_v2;
1793
1794 netif_napi_add(priv->netdev, &rd->napi,
1795 hns_nic_common_poll, NIC_RX_CLEAN_MAX_NUM);
1796 rd->ring->irq_init_flag = RCB_IRQ_NOT_INITED;
1797 }
1798
1799 return 0;
1800 }
1801
1802 static void hns_nic_uninit_ring_data(struct hns_nic_priv *priv)
1803 {
1804 struct hnae_handle *h = priv->ae_handle;
1805 int i;
1806
1807 for (i = 0; i < h->q_num * 2; i++) {
1808 netif_napi_del(&priv->ring_data[i].napi);
1809 if (priv->ring_data[i].ring->irq_init_flag == RCB_IRQ_INITED) {
1810 (void)irq_set_affinity_hint(
1811 priv->ring_data[i].ring->irq,
1812 NULL);
1813 free_irq(priv->ring_data[i].ring->irq,
1814 &priv->ring_data[i]);
1815 }
1816
1817 priv->ring_data[i].ring->irq_init_flag = RCB_IRQ_NOT_INITED;
1818 }
1819 kfree(priv->ring_data);
1820 }
1821
1822 static void hns_nic_set_priv_ops(struct net_device *netdev)
1823 {
1824 struct hns_nic_priv *priv = netdev_priv(netdev);
1825 struct hnae_handle *h = priv->ae_handle;
1826
1827 if (AE_IS_VER1(priv->enet_ver)) {
1828 priv->ops.fill_desc = fill_desc;
1829 priv->ops.get_rxd_bnum = get_rx_desc_bnum;
1830 priv->ops.maybe_stop_tx = hns_nic_maybe_stop_tx;
1831 } else {
1832 priv->ops.get_rxd_bnum = get_v2rx_desc_bnum;
1833 if ((netdev->features & NETIF_F_TSO) ||
1834 (netdev->features & NETIF_F_TSO6)) {
1835 priv->ops.fill_desc = fill_tso_desc;
1836 priv->ops.maybe_stop_tx = hns_nic_maybe_stop_tso;
1837 /* This chip only support 7*4096 */
1838 netif_set_gso_max_size(netdev, 7 * 4096);
1839 } else {
1840 priv->ops.fill_desc = fill_v2_desc;
1841 priv->ops.maybe_stop_tx = hns_nic_maybe_stop_tx;
1842 }
1843 /* enable tso when init
1844 * control tso on/off through TSE bit in bd
1845 */
1846 h->dev->ops->set_tso_stats(h, 1);
1847 }
1848 }
1849
1850 static int hns_nic_try_get_ae(struct net_device *ndev)
1851 {
1852 struct hns_nic_priv *priv = netdev_priv(ndev);
1853 struct hnae_handle *h;
1854 int ret;
1855
1856 h = hnae_get_handle(&priv->netdev->dev,
1857 priv->fwnode, priv->port_id, NULL);
1858 if (IS_ERR_OR_NULL(h)) {
1859 ret = -ENODEV;
1860 dev_dbg(priv->dev, "has not handle, register notifier!\n");
1861 goto out;
1862 }
1863 priv->ae_handle = h;
1864
1865 ret = hns_nic_init_phy(ndev, h);
1866 if (ret) {
1867 dev_err(priv->dev, "probe phy device fail!\n");
1868 goto out_init_phy;
1869 }
1870
1871 ret = hns_nic_init_ring_data(priv);
1872 if (ret) {
1873 ret = -ENOMEM;
1874 goto out_init_ring_data;
1875 }
1876
1877 hns_nic_set_priv_ops(ndev);
1878
1879 ret = register_netdev(ndev);
1880 if (ret) {
1881 dev_err(priv->dev, "probe register netdev fail!\n");
1882 goto out_reg_ndev_fail;
1883 }
1884 return 0;
1885
1886 out_reg_ndev_fail:
1887 hns_nic_uninit_ring_data(priv);
1888 priv->ring_data = NULL;
1889 out_init_phy:
1890 out_init_ring_data:
1891 hnae_put_handle(priv->ae_handle);
1892 priv->ae_handle = NULL;
1893 out:
1894 return ret;
1895 }
1896
1897 static int hns_nic_notifier_action(struct notifier_block *nb,
1898 unsigned long action, void *data)
1899 {
1900 struct hns_nic_priv *priv =
1901 container_of(nb, struct hns_nic_priv, notifier_block);
1902
1903 assert(action == HNAE_AE_REGISTER);
1904
1905 if (!hns_nic_try_get_ae(priv->netdev)) {
1906 hnae_unregister_notifier(&priv->notifier_block);
1907 priv->notifier_block.notifier_call = NULL;
1908 }
1909 return 0;
1910 }
1911
1912 static int hns_nic_dev_probe(struct platform_device *pdev)
1913 {
1914 struct device *dev = &pdev->dev;
1915 struct net_device *ndev;
1916 struct hns_nic_priv *priv;
1917 u32 port_id;
1918 int ret;
1919
1920 ndev = alloc_etherdev_mq(sizeof(struct hns_nic_priv), NIC_MAX_Q_PER_VF);
1921 if (!ndev)
1922 return -ENOMEM;
1923
1924 platform_set_drvdata(pdev, ndev);
1925
1926 priv = netdev_priv(ndev);
1927 priv->dev = dev;
1928 priv->netdev = ndev;
1929
1930 if (dev_of_node(dev)) {
1931 struct device_node *ae_node;
1932
1933 if (of_device_is_compatible(dev->of_node,
1934 "hisilicon,hns-nic-v1"))
1935 priv->enet_ver = AE_VERSION_1;
1936 else
1937 priv->enet_ver = AE_VERSION_2;
1938
1939 ae_node = of_parse_phandle(dev->of_node, "ae-handle", 0);
1940 if (IS_ERR_OR_NULL(ae_node)) {
1941 ret = PTR_ERR(ae_node);
1942 dev_err(dev, "not find ae-handle\n");
1943 goto out_read_prop_fail;
1944 }
1945 priv->fwnode = &ae_node->fwnode;
1946 } else if (is_acpi_node(dev->fwnode)) {
1947 struct acpi_reference_args args;
1948
1949 if (acpi_dev_found(hns_enet_acpi_match[0].id))
1950 priv->enet_ver = AE_VERSION_1;
1951 else if (acpi_dev_found(hns_enet_acpi_match[1].id))
1952 priv->enet_ver = AE_VERSION_2;
1953 else
1954 return -ENXIO;
1955
1956 /* try to find port-idx-in-ae first */
1957 ret = acpi_node_get_property_reference(dev->fwnode,
1958 "ae-handle", 0, &args);
1959 if (ret) {
1960 dev_err(dev, "not find ae-handle\n");
1961 goto out_read_prop_fail;
1962 }
1963 priv->fwnode = acpi_fwnode_handle(args.adev);
1964 } else {
1965 dev_err(dev, "cannot read cfg data from OF or acpi\n");
1966 return -ENXIO;
1967 }
1968
1969 ret = device_property_read_u32(dev, "port-idx-in-ae", &port_id);
1970 if (ret) {
1971 /* only for old code compatible */
1972 ret = device_property_read_u32(dev, "port-id", &port_id);
1973 if (ret)
1974 goto out_read_prop_fail;
1975 /* for old dts, we need to caculate the port offset */
1976 port_id = port_id < HNS_SRV_OFFSET ? port_id + HNS_DEBUG_OFFSET
1977 : port_id - HNS_SRV_OFFSET;
1978 }
1979 priv->port_id = port_id;
1980
1981 hns_init_mac_addr(ndev);
1982
1983 ndev->watchdog_timeo = HNS_NIC_TX_TIMEOUT;
1984 ndev->priv_flags |= IFF_UNICAST_FLT;
1985 ndev->netdev_ops = &hns_nic_netdev_ops;
1986 hns_ethtool_set_ops(ndev);
1987
1988 ndev->features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
1989 NETIF_F_RXCSUM | NETIF_F_SG | NETIF_F_GSO |
1990 NETIF_F_GRO;
1991 ndev->vlan_features |=
1992 NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM | NETIF_F_RXCSUM;
1993 ndev->vlan_features |= NETIF_F_SG | NETIF_F_GSO | NETIF_F_GRO;
1994
1995 switch (priv->enet_ver) {
1996 case AE_VERSION_2:
1997 ndev->features |= NETIF_F_TSO | NETIF_F_TSO6;
1998 ndev->hw_features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
1999 NETIF_F_RXCSUM | NETIF_F_SG | NETIF_F_GSO |
2000 NETIF_F_GRO | NETIF_F_TSO | NETIF_F_TSO6;
2001 break;
2002 default:
2003 break;
2004 }
2005
2006 SET_NETDEV_DEV(ndev, dev);
2007
2008 if (!dma_set_mask_and_coherent(dev, DMA_BIT_MASK(64)))
2009 dev_dbg(dev, "set mask to 64bit\n");
2010 else
2011 dev_err(dev, "set mask to 64bit fail!\n");
2012
2013 /* carrier off reporting is important to ethtool even BEFORE open */
2014 netif_carrier_off(ndev);
2015
2016 setup_timer(&priv->service_timer, hns_nic_service_timer,
2017 (unsigned long)priv);
2018 INIT_WORK(&priv->service_task, hns_nic_service_task);
2019
2020 set_bit(NIC_STATE_SERVICE_INITED, &priv->state);
2021 clear_bit(NIC_STATE_SERVICE_SCHED, &priv->state);
2022 set_bit(NIC_STATE_DOWN, &priv->state);
2023
2024 if (hns_nic_try_get_ae(priv->netdev)) {
2025 priv->notifier_block.notifier_call = hns_nic_notifier_action;
2026 ret = hnae_register_notifier(&priv->notifier_block);
2027 if (ret) {
2028 dev_err(dev, "register notifier fail!\n");
2029 goto out_notify_fail;
2030 }
2031 dev_dbg(dev, "has not handle, register notifier!\n");
2032 }
2033
2034 return 0;
2035
2036 out_notify_fail:
2037 (void)cancel_work_sync(&priv->service_task);
2038 out_read_prop_fail:
2039 free_netdev(ndev);
2040 return ret;
2041 }
2042
2043 static int hns_nic_dev_remove(struct platform_device *pdev)
2044 {
2045 struct net_device *ndev = platform_get_drvdata(pdev);
2046 struct hns_nic_priv *priv = netdev_priv(ndev);
2047
2048 if (ndev->reg_state != NETREG_UNINITIALIZED)
2049 unregister_netdev(ndev);
2050
2051 if (priv->ring_data)
2052 hns_nic_uninit_ring_data(priv);
2053 priv->ring_data = NULL;
2054
2055 if (ndev->phydev)
2056 phy_disconnect(ndev->phydev);
2057
2058 if (!IS_ERR_OR_NULL(priv->ae_handle))
2059 hnae_put_handle(priv->ae_handle);
2060 priv->ae_handle = NULL;
2061 if (priv->notifier_block.notifier_call)
2062 hnae_unregister_notifier(&priv->notifier_block);
2063 priv->notifier_block.notifier_call = NULL;
2064
2065 set_bit(NIC_STATE_REMOVING, &priv->state);
2066 (void)cancel_work_sync(&priv->service_task);
2067
2068 free_netdev(ndev);
2069 return 0;
2070 }
2071
2072 static const struct of_device_id hns_enet_of_match[] = {
2073 {.compatible = "hisilicon,hns-nic-v1",},
2074 {.compatible = "hisilicon,hns-nic-v2",},
2075 {},
2076 };
2077
2078 MODULE_DEVICE_TABLE(of, hns_enet_of_match);
2079
2080 static struct platform_driver hns_nic_dev_driver = {
2081 .driver = {
2082 .name = "hns-nic",
2083 .of_match_table = hns_enet_of_match,
2084 .acpi_match_table = ACPI_PTR(hns_enet_acpi_match),
2085 },
2086 .probe = hns_nic_dev_probe,
2087 .remove = hns_nic_dev_remove,
2088 };
2089
2090 module_platform_driver(hns_nic_dev_driver);
2091
2092 MODULE_DESCRIPTION("HISILICON HNS Ethernet driver");
2093 MODULE_AUTHOR("Hisilicon, Inc.");
2094 MODULE_LICENSE("GPL");
2095 MODULE_ALIAS("platform:hns-nic");
Linux with added FPC-III support