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[mirror_ubuntu-zesty-kernel.git] / drivers / net / ethernet / hisilicon / hns / hns_enet.c
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b5996f11 1/*
2 * Copyright (c) 2014-2015 Hisilicon Limited.
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
8 */
9
10#include <linux/clk.h>
11#include <linux/cpumask.h>
12#include <linux/etherdevice.h>
13#include <linux/if_vlan.h>
14#include <linux/interrupt.h>
15#include <linux/io.h>
16#include <linux/ip.h>
17#include <linux/ipv6.h>
18#include <linux/module.h>
19#include <linux/phy.h>
20#include <linux/platform_device.h>
21#include <linux/skbuff.h>
22
23#include "hnae.h"
24#include "hns_enet.h"
44770e11 25#include "hns_dsaf_mac.h"
b5996f11 26
27#define NIC_MAX_Q_PER_VF 16
28#define HNS_NIC_TX_TIMEOUT (5 * HZ)
29
30#define SERVICE_TIMER_HZ (1 * HZ)
31
32#define NIC_TX_CLEAN_MAX_NUM 256
33#define NIC_RX_CLEAN_MAX_NUM 64
34
b5996f11 35#define RCB_IRQ_NOT_INITED 0
36#define RCB_IRQ_INITED 1
9cbe9fd5 37#define HNS_BUFFER_SIZE_2048 2048
b5996f11 38
13ac695e
S		 39#define BD_MAX_SEND_SIZE 8191
40#define SKB_TMP_LEN(SKB) \
41 (((SKB)->transport_header - (SKB)->mac_header) + tcp_hdrlen(SKB))
42
43static void fill_v2_desc(struct hnae_ring *ring, void *priv,
44 int size, dma_addr_t dma, int frag_end,
45 int buf_num, enum hns_desc_type type, int mtu)
46{
47 struct hnae_desc *desc = &ring->desc[ring->next_to_use];
48 struct hnae_desc_cb *desc_cb = &ring->desc_cb[ring->next_to_use];
49 struct iphdr *iphdr;
50 struct ipv6hdr *ipv6hdr;
51 struct sk_buff *skb;
13ac695e
S		 52 __be16 protocol;
53 u8 bn_pid = 0;
54 u8 rrcfv = 0;
55 u8 ip_offset = 0;
56 u8 tvsvsn = 0;
57 u16 mss = 0;
58 u8 l4_len = 0;
59 u16 paylen = 0;
60
61 desc_cb->priv = priv;
62 desc_cb->length = size;
63 desc_cb->dma = dma;
64 desc_cb->type = type;
65
66 desc->addr = cpu_to_le64(dma);
67 desc->tx.send_size = cpu_to_le16((u16)size);
68
f8a1a636 69 /* config bd buffer end */
13ac695e
S		 70 hnae_set_bit(rrcfv, HNSV2_TXD_VLD_B, 1);
71 hnae_set_field(bn_pid, HNSV2_TXD_BUFNUM_M, 0, buf_num - 1);
72
f8a1a636
SL		 73 /* fill port_id in the tx bd for sending management pkts */
74 hnae_set_field(bn_pid, HNSV2_TXD_PORTID_M,
75 HNSV2_TXD_PORTID_S, ring->q->handle->dport_id);
76
13ac695e
S		 77 if (type == DESC_TYPE_SKB) {
78 skb = (struct sk_buff *)priv;
79
80 if (skb->ip_summed == CHECKSUM_PARTIAL) {
81 skb_reset_mac_len(skb);
82 protocol = skb->protocol;
83 ip_offset = ETH_HLEN;
84
85 if (protocol == htons(ETH_P_8021Q)) {
86 ip_offset += VLAN_HLEN;
87 protocol = vlan_get_protocol(skb);
88 skb->protocol = protocol;
89 }
90
91 if (skb->protocol == htons(ETH_P_IP)) {
92 iphdr = ip_hdr(skb);
93 hnae_set_bit(rrcfv, HNSV2_TXD_L3CS_B, 1);
94 hnae_set_bit(rrcfv, HNSV2_TXD_L4CS_B, 1);
95
96 /* check for tcp/udp header */
0b51b1dc
DH		 97 if (iphdr->protocol == IPPROTO_TCP &&
98 skb_is_gso(skb)) {
13ac695e
S		 99 hnae_set_bit(tvsvsn,
100 HNSV2_TXD_TSE_B, 1);
13ac695e 101 l4_len = tcp_hdrlen(skb);
0b51b1dc
DH		 102 mss = skb_shinfo(skb)->gso_size;
103 paylen = skb->len - SKB_TMP_LEN(skb);
13ac695e
S		 104 }
105 } else if (skb->protocol == htons(ETH_P_IPV6)) {
106 hnae_set_bit(tvsvsn, HNSV2_TXD_IPV6_B, 1);
107 ipv6hdr = ipv6_hdr(skb);
108 hnae_set_bit(rrcfv, HNSV2_TXD_L4CS_B, 1);
109
110 /* check for tcp/udp header */
0b51b1dc
DH		 111 if (ipv6hdr->nexthdr == IPPROTO_TCP &&
112 skb_is_gso(skb) && skb_is_gso_v6(skb)) {
13ac695e
S		 113 hnae_set_bit(tvsvsn,
114 HNSV2_TXD_TSE_B, 1);
13ac695e 115 l4_len = tcp_hdrlen(skb);
0b51b1dc
DH		 116 mss = skb_shinfo(skb)->gso_size;
117 paylen = skb->len - SKB_TMP_LEN(skb);
13ac695e
S		 118 }
119 }
120 desc->tx.ip_offset = ip_offset;
121 desc->tx.tse_vlan_snap_v6_sctp_nth = tvsvsn;
122 desc->tx.mss = cpu_to_le16(mss);
123 desc->tx.l4_len = l4_len;
124 desc->tx.paylen = cpu_to_le16(paylen);
125 }
126 }
127
128 hnae_set_bit(rrcfv, HNSV2_TXD_FE_B, frag_end);
129
130 desc->tx.bn_pid = bn_pid;
131 desc->tx.ra_ri_cs_fe_vld = rrcfv;
132
133 ring_ptr_move_fw(ring, next_to_use);
134}
135
63434888
KY		 136static const struct acpi_device_id hns_enet_acpi_match[] = {
137 { "HISI00C1", 0 },
138 { "HISI00C2", 0 },
139 { },
140};
141MODULE_DEVICE_TABLE(acpi, hns_enet_acpi_match);
142
b5996f11 143static void fill_desc(struct hnae_ring *ring, void *priv,
144 int size, dma_addr_t dma, int frag_end,
13ac695e 145 int buf_num, enum hns_desc_type type, int mtu)
b5996f11 146{
147 struct hnae_desc *desc = &ring->desc[ring->next_to_use];
148 struct hnae_desc_cb *desc_cb = &ring->desc_cb[ring->next_to_use];
149 struct sk_buff *skb;
150 __be16 protocol;
151 u32 ip_offset;
152 u32 asid_bufnum_pid = 0;
153 u32 flag_ipoffset = 0;
154
155 desc_cb->priv = priv;
156 desc_cb->length = size;
157 desc_cb->dma = dma;
158 desc_cb->type = type;
159
160 desc->addr = cpu_to_le64(dma);
161 desc->tx.send_size = cpu_to_le16((u16)size);
162
163 /*config bd buffer end */
164 flag_ipoffset |= 1 << HNS_TXD_VLD_B;
165
166 asid_bufnum_pid |= buf_num << HNS_TXD_BUFNUM_S;
167
168 if (type == DESC_TYPE_SKB) {
169 skb = (struct sk_buff *)priv;
170
171 if (skb->ip_summed == CHECKSUM_PARTIAL) {
172 protocol = skb->protocol;
173 ip_offset = ETH_HLEN;
174
175 /*if it is a SW VLAN check the next protocol*/
176 if (protocol == htons(ETH_P_8021Q)) {
177 ip_offset += VLAN_HLEN;
178 protocol = vlan_get_protocol(skb);
179 skb->protocol = protocol;
180 }
181
182 if (skb->protocol == htons(ETH_P_IP)) {
183 flag_ipoffset |= 1 << HNS_TXD_L3CS_B;
184 /* check for tcp/udp header */
185 flag_ipoffset |= 1 << HNS_TXD_L4CS_B;
186
187 } else if (skb->protocol == htons(ETH_P_IPV6)) {
188 /* ipv6 has not l3 cs, check for L4 header */
189 flag_ipoffset |= 1 << HNS_TXD_L4CS_B;
190 }
191
192 flag_ipoffset |= ip_offset << HNS_TXD_IPOFFSET_S;
193 }
194 }
195
196 flag_ipoffset |= frag_end << HNS_TXD_FE_B;
197
198 desc->tx.asid_bufnum_pid = cpu_to_le16(asid_bufnum_pid);
199 desc->tx.flag_ipoffset = cpu_to_le32(flag_ipoffset);
200
201 ring_ptr_move_fw(ring, next_to_use);
202}
203
204static void unfill_desc(struct hnae_ring *ring)
205{
206 ring_ptr_move_bw(ring, next_to_use);
207}
208
13ac695e
S		 209static int hns_nic_maybe_stop_tx(
210 struct sk_buff **out_skb, int *bnum, struct hnae_ring *ring)
b5996f11 211{
13ac695e
S		 212 struct sk_buff *skb = *out_skb;
213 struct sk_buff *new_skb = NULL;
b5996f11 214 int buf_num;
b5996f11 215
216 /* no. of segments (plus a header) */
217 buf_num = skb_shinfo(skb)->nr_frags + 1;
218
219 if (unlikely(buf_num > ring->max_desc_num_per_pkt)) {
13ac695e
S		 220 if (ring_space(ring) < 1)
221 return -EBUSY;
b5996f11 222
223 new_skb = skb_copy(skb, GFP_ATOMIC);
13ac695e
S		 224 if (!new_skb)
225 return -ENOMEM;
b5996f11 226
227 dev_kfree_skb_any(skb);
13ac695e 228 *out_skb = new_skb;
b5996f11 229 buf_num = 1;
b5996f11 230 } else if (buf_num > ring_space(ring)) {
13ac695e
S		 231 return -EBUSY;
232 }
233
234 *bnum = buf_num;
235 return 0;
236}
237
64353af6
S		 238static int hns_nic_maybe_stop_tso(
239 struct sk_buff **out_skb, int *bnum, struct hnae_ring *ring)
240{
241 int i;
242 int size;
243 int buf_num;
244 int frag_num;
245 struct sk_buff *skb = *out_skb;
246 struct sk_buff *new_skb = NULL;
247 struct skb_frag_struct *frag;
248
249 size = skb_headlen(skb);
250 buf_num = (size + BD_MAX_SEND_SIZE - 1) / BD_MAX_SEND_SIZE;
251
252 frag_num = skb_shinfo(skb)->nr_frags;
253 for (i = 0; i < frag_num; i++) {
254 frag = &skb_shinfo(skb)->frags[i];
255 size = skb_frag_size(frag);
256 buf_num += (size + BD_MAX_SEND_SIZE - 1) / BD_MAX_SEND_SIZE;
257 }
258
259 if (unlikely(buf_num > ring->max_desc_num_per_pkt)) {
260 buf_num = (skb->len + BD_MAX_SEND_SIZE - 1) / BD_MAX_SEND_SIZE;
261 if (ring_space(ring) < buf_num)
262 return -EBUSY;
263 /* manual split the send packet */
264 new_skb = skb_copy(skb, GFP_ATOMIC);
265 if (!new_skb)
266 return -ENOMEM;
267 dev_kfree_skb_any(skb);
268 *out_skb = new_skb;
269
270 } else if (ring_space(ring) < buf_num) {
271 return -EBUSY;
272 }
273
274 *bnum = buf_num;
275 return 0;
276}
277
278static void fill_tso_desc(struct hnae_ring *ring, void *priv,
279 int size, dma_addr_t dma, int frag_end,
280 int buf_num, enum hns_desc_type type, int mtu)
281{
282 int frag_buf_num;
283 int sizeoflast;
284 int k;
285
286 frag_buf_num = (size + BD_MAX_SEND_SIZE - 1) / BD_MAX_SEND_SIZE;
287 sizeoflast = size % BD_MAX_SEND_SIZE;
288 sizeoflast = sizeoflast ? sizeoflast : BD_MAX_SEND_SIZE;
289
290 /* when the frag size is bigger than hardware, split this frag */
291 for (k = 0; k < frag_buf_num; k++)
292 fill_v2_desc(ring, priv,
293 (k == frag_buf_num - 1) ?
294 sizeoflast : BD_MAX_SEND_SIZE,
295 dma + BD_MAX_SEND_SIZE * k,
296 frag_end && (k == frag_buf_num - 1) ? 1 : 0,
297 buf_num,
298 (type == DESC_TYPE_SKB && !k) ?
299 DESC_TYPE_SKB : DESC_TYPE_PAGE,
300 mtu);
301}
302
13ac695e
S		 303int hns_nic_net_xmit_hw(struct net_device *ndev,
304 struct sk_buff *skb,
305 struct hns_nic_ring_data *ring_data)
306{
307 struct hns_nic_priv *priv = netdev_priv(ndev);
308 struct device *dev = priv->dev;
309 struct hnae_ring *ring = ring_data->ring;
310 struct netdev_queue *dev_queue;
311 struct skb_frag_struct *frag;
312 int buf_num;
313 int seg_num;
314 dma_addr_t dma;
315 int size, next_to_use;
316 int i;
317
318 switch (priv->ops.maybe_stop_tx(&skb, &buf_num, ring)) {
319 case -EBUSY:
b5996f11 320 ring->stats.tx_busy++;
321 goto out_net_tx_busy;
13ac695e
S		 322 case -ENOMEM:
323 ring->stats.sw_err_cnt++;
324 netdev_err(ndev, "no memory to xmit!\n");
325 goto out_err_tx_ok;
326 default:
327 break;
b5996f11 328 }
13ac695e
S		 329
330 /* no. of segments (plus a header) */
331 seg_num = skb_shinfo(skb)->nr_frags + 1;
b5996f11 332 next_to_use = ring->next_to_use;
333
334 /* fill the first part */
335 size = skb_headlen(skb);
336 dma = dma_map_single(dev, skb->data, size, DMA_TO_DEVICE);
337 if (dma_mapping_error(dev, dma)) {
338 netdev_err(ndev, "TX head DMA map failed\n");
339 ring->stats.sw_err_cnt++;
340 goto out_err_tx_ok;
341 }
13ac695e
S		 342 priv->ops.fill_desc(ring, skb, size, dma, seg_num == 1 ? 1 : 0,
343 buf_num, DESC_TYPE_SKB, ndev->mtu);
b5996f11 344
345 /* fill the fragments */
13ac695e 346 for (i = 1; i < seg_num; i++) {
b5996f11 347 frag = &skb_shinfo(skb)->frags[i - 1];
348 size = skb_frag_size(frag);
349 dma = skb_frag_dma_map(dev, frag, 0, size, DMA_TO_DEVICE);
350 if (dma_mapping_error(dev, dma)) {
351 netdev_err(ndev, "TX frag(%d) DMA map failed\n", i);
352 ring->stats.sw_err_cnt++;
353 goto out_map_frag_fail;
354 }
13ac695e
S		 355 priv->ops.fill_desc(ring, skb_frag_page(frag), size, dma,
356 seg_num - 1 == i ? 1 : 0, buf_num,
357 DESC_TYPE_PAGE, ndev->mtu);
b5996f11 358 }
359
360 /*complete translate all packets*/
361 dev_queue = netdev_get_tx_queue(ndev, skb->queue_mapping);
362 netdev_tx_sent_queue(dev_queue, skb->len);
363
364 wmb(); /* commit all data before submit */
365 assert(skb->queue_mapping < priv->ae_handle->q_num);
366 hnae_queue_xmit(priv->ae_handle->qs[skb->queue_mapping], buf_num);
367 ring->stats.tx_pkts++;
368 ring->stats.tx_bytes += skb->len;
369
370 return NETDEV_TX_OK;
371
372out_map_frag_fail:
373
13ac695e 374 while (ring->next_to_use != next_to_use) {
b5996f11 375 unfill_desc(ring);
13ac695e
S		 376 if (ring->next_to_use != next_to_use)
377 dma_unmap_page(dev,
378 ring->desc_cb[ring->next_to_use].dma,
379 ring->desc_cb[ring->next_to_use].length,
380 DMA_TO_DEVICE);
381 else
382 dma_unmap_single(dev,
383 ring->desc_cb[next_to_use].dma,
384 ring->desc_cb[next_to_use].length,
385 DMA_TO_DEVICE);
b5996f11 386 }
387
b5996f11 388out_err_tx_ok:
389
390 dev_kfree_skb_any(skb);
391 return NETDEV_TX_OK;
392
393out_net_tx_busy:
394
395 netif_stop_subqueue(ndev, skb->queue_mapping);
396
397 /* Herbert's original patch had:
398 * smp_mb__after_netif_stop_queue();
399 * but since that doesn't exist yet, just open code it.
400 */
401 smp_mb();
402 return NETDEV_TX_BUSY;
403}
404
405/**
406 * hns_nic_get_headlen - determine size of header for RSC/LRO/GRO/FCOE
407 * @data: pointer to the start of the headers
408 * @max: total length of section to find headers in
409 *
410 * This function is meant to determine the length of headers that will
411 * be recognized by hardware for LRO, GRO, and RSC offloads. The main
412 * motivation of doing this is to only perform one pull for IPv4 TCP
413 * packets so that we can do basic things like calculating the gso_size
414 * based on the average data per packet.
415 **/
416static unsigned int hns_nic_get_headlen(unsigned char *data, u32 flag,
417 unsigned int max_size)
418{
419 unsigned char *network;
420 u8 hlen;
421
422 /* this should never happen, but better safe than sorry */
423 if (max_size < ETH_HLEN)
424 return max_size;
425
426 /* initialize network frame pointer */
427 network = data;
428
429 /* set first protocol and move network header forward */
430 network += ETH_HLEN;
431
432 /* handle any vlan tag if present */
433 if (hnae_get_field(flag, HNS_RXD_VLAN_M, HNS_RXD_VLAN_S)
434 == HNS_RX_FLAG_VLAN_PRESENT) {
435 if ((typeof(max_size))(network - data) > (max_size - VLAN_HLEN))
436 return max_size;
437
438 network += VLAN_HLEN;
439 }
440
441 /* handle L3 protocols */
442 if (hnae_get_field(flag, HNS_RXD_L3ID_M, HNS_RXD_L3ID_S)
443 == HNS_RX_FLAG_L3ID_IPV4) {
444 if ((typeof(max_size))(network - data) >
445 (max_size - sizeof(struct iphdr)))
446 return max_size;
447
448 /* access ihl as a u8 to avoid unaligned access on ia64 */
449 hlen = (network[0] & 0x0F) << 2;
450
451 /* verify hlen meets minimum size requirements */
452 if (hlen < sizeof(struct iphdr))
453 return network - data;
454
455 /* record next protocol if header is present */
456 } else if (hnae_get_field(flag, HNS_RXD_L3ID_M, HNS_RXD_L3ID_S)
457 == HNS_RX_FLAG_L3ID_IPV6) {
458 if ((typeof(max_size))(network - data) >
459 (max_size - sizeof(struct ipv6hdr)))
460 return max_size;
461
462 /* record next protocol */
463 hlen = sizeof(struct ipv6hdr);
464 } else {
465 return network - data;
466 }
467
468 /* relocate pointer to start of L4 header */
469 network += hlen;
470
471 /* finally sort out TCP/UDP */
472 if (hnae_get_field(flag, HNS_RXD_L4ID_M, HNS_RXD_L4ID_S)
473 == HNS_RX_FLAG_L4ID_TCP) {
474 if ((typeof(max_size))(network - data) >
475 (max_size - sizeof(struct tcphdr)))
476 return max_size;
477
478 /* access doff as a u8 to avoid unaligned access on ia64 */
479 hlen = (network[12] & 0xF0) >> 2;
480
481 /* verify hlen meets minimum size requirements */
482 if (hlen < sizeof(struct tcphdr))
483 return network - data;
484
485 network += hlen;
486 } else if (hnae_get_field(flag, HNS_RXD_L4ID_M, HNS_RXD_L4ID_S)
487 == HNS_RX_FLAG_L4ID_UDP) {
488 if ((typeof(max_size))(network - data) >
489 (max_size - sizeof(struct udphdr)))
490 return max_size;
491
492 network += sizeof(struct udphdr);
493 }
494
495 /* If everything has gone correctly network should be the
496 * data section of the packet and will be the end of the header.
497 * If not then it probably represents the end of the last recognized
498 * header.
499 */
500 if ((typeof(max_size))(network - data) < max_size)
501 return network - data;
502 else
503 return max_size;
504}
505
9cbe9fd5 506static void hns_nic_reuse_page(struct sk_buff *skb, int i,
507 struct hnae_ring *ring, int pull_len,
508 struct hnae_desc_cb *desc_cb)
b5996f11 509{
9cbe9fd5 510 struct hnae_desc *desc;
511 int truesize, size;
512 int last_offset;
be78a690
AB		 513 bool twobufs;
514
515 twobufs = ((PAGE_SIZE < 8192) && hnae_buf_size(ring) == HNS_BUFFER_SIZE_2048);
9cbe9fd5 516
517 desc = &ring->desc[ring->next_to_clean];
518 size = le16_to_cpu(desc->rx.size);
519
be78a690 520 if (twobufs) {
9cbe9fd5 521 truesize = hnae_buf_size(ring);
522 } else {
523 truesize = ALIGN(size, L1_CACHE_BYTES);
524 last_offset = hnae_page_size(ring) - hnae_buf_size(ring);
525 }
526
9cbe9fd5 527 skb_add_rx_frag(skb, i, desc_cb->priv, desc_cb->page_offset + pull_len,
528 size - pull_len, truesize - pull_len);
529
b5996f11 530 /* avoid re-using remote pages,flag default unreuse */
be78a690
AB		 531 if (unlikely(page_to_nid(desc_cb->priv) != numa_node_id()))
532 return;
533
534 if (twobufs) {
535 /* if we are only owner of page we can reuse it */
536 if (likely(page_count(desc_cb->priv) == 1)) {
537 /* flip page offset to other buffer */
538 desc_cb->page_offset ^= truesize;
b5996f11 539
b5996f11 540 desc_cb->reuse_flag = 1;
541 /* bump ref count on page before it is given*/
542 get_page(desc_cb->priv);
543 }
be78a690
AB		 544 return;
545 }
546
547 /* move offset up to the next cache line */
548 desc_cb->page_offset += truesize;
549
550 if (desc_cb->page_offset <= last_offset) {
551 desc_cb->reuse_flag = 1;
552 /* bump ref count on page before it is given*/
553 get_page(desc_cb->priv);
b5996f11 554 }
555}
556
13ac695e
S		 557static void get_v2rx_desc_bnum(u32 bnum_flag, int *out_bnum)
558{
559 *out_bnum = hnae_get_field(bnum_flag,
560 HNS_RXD_BUFNUM_M, HNS_RXD_BUFNUM_S) + 1;
561}
562
563static void get_rx_desc_bnum(u32 bnum_flag, int *out_bnum)
564{
565 *out_bnum = hnae_get_field(bnum_flag,
566 HNS_RXD_BUFNUM_M, HNS_RXD_BUFNUM_S);
567}
568
862b3d20
S		 569static void hns_nic_rx_checksum(struct hns_nic_ring_data *ring_data,
570 struct sk_buff *skb, u32 flag)
571{
572 struct net_device *netdev = ring_data->napi.dev;
573 u32 l3id;
574 u32 l4id;
575
576 /* check if RX checksum offload is enabled */
577 if (unlikely(!(netdev->features & NETIF_F_RXCSUM)))
578 return;
579
580 /* In hardware, we only support checksum for the following protocols:
581 * 1) IPv4,
582 * 2) TCP(over IPv4 or IPv6),
583 * 3) UDP(over IPv4 or IPv6),
584 * 4) SCTP(over IPv4 or IPv6)
585 * but we support many L3(IPv4, IPv6, MPLS, PPPoE etc) and L4(TCP,
586 * UDP, GRE, SCTP, IGMP, ICMP etc.) protocols.
587 *
588 * Hardware limitation:
589 * Our present hardware RX Descriptor lacks L3/L4 checksum "Status &
590 * Error" bit (which usually can be used to indicate whether checksum
591 * was calculated by the hardware and if there was any error encountered
592 * during checksum calculation).
593 *
594 * Software workaround:
595 * We do get info within the RX descriptor about the kind of L3/L4
596 * protocol coming in the packet and the error status. These errors
597 * might not just be checksum errors but could be related to version,
598 * length of IPv4, UDP, TCP etc.
599 * Because there is no-way of knowing if it is a L3/L4 error due to bad
600 * checksum or any other L3/L4 error, we will not (cannot) convey
601 * checksum status for such cases to upper stack and will not maintain
602 * the RX L3/L4 checksum counters as well.
603 */
604
605 l3id = hnae_get_field(flag, HNS_RXD_L3ID_M, HNS_RXD_L3ID_S);
606 l4id = hnae_get_field(flag, HNS_RXD_L4ID_M, HNS_RXD_L4ID_S);
607
608 /* check L3 protocol for which checksum is supported */
609 if ((l3id != HNS_RX_FLAG_L3ID_IPV4) && (l3id != HNS_RX_FLAG_L3ID_IPV6))
610 return;
611
612 /* check for any(not just checksum)flagged L3 protocol errors */
613 if (unlikely(hnae_get_bit(flag, HNS_RXD_L3E_B)))
614 return;
615
616 /* we do not support checksum of fragmented packets */
617 if (unlikely(hnae_get_bit(flag, HNS_RXD_FRAG_B)))
618 return;
619
620 /* check L4 protocol for which checksum is supported */
621 if ((l4id != HNS_RX_FLAG_L4ID_TCP) &&
622 (l4id != HNS_RX_FLAG_L4ID_UDP) &&
623 (l4id != HNS_RX_FLAG_L4ID_SCTP))
624 return;
625
626 /* check for any(not just checksum)flagged L4 protocol errors */
627 if (unlikely(hnae_get_bit(flag, HNS_RXD_L4E_B)))
628 return;
629
630 /* now, this has to be a packet with valid RX checksum */
631 skb->ip_summed = CHECKSUM_UNNECESSARY;
632}
633
b5996f11 634static int hns_nic_poll_rx_skb(struct hns_nic_ring_data *ring_data,
635 struct sk_buff **out_skb, int *out_bnum)
636{
637 struct hnae_ring *ring = ring_data->ring;
638 struct net_device *ndev = ring_data->napi.dev;
13ac695e 639 struct hns_nic_priv *priv = netdev_priv(ndev);
b5996f11 640 struct sk_buff *skb;
641 struct hnae_desc *desc;
642 struct hnae_desc_cb *desc_cb;
643 unsigned char *va;
9cbe9fd5 644 int bnum, length, i;
b5996f11 645 int pull_len;
646 u32 bnum_flag;
647
b5996f11 648 desc = &ring->desc[ring->next_to_clean];
649 desc_cb = &ring->desc_cb[ring->next_to_clean];
13ac695e
S		 650
651 prefetch(desc);
652
b5996f11 653 va = (unsigned char *)desc_cb->buf + desc_cb->page_offset;
654
13ac695e
S		 655 /* prefetch first cache line of first page */
656 prefetch(va);
657#if L1_CACHE_BYTES < 128
658 prefetch(va + L1_CACHE_BYTES);
659#endif
660
661 skb = *out_skb = napi_alloc_skb(&ring_data->napi,
662 HNS_RX_HEAD_SIZE);
b5996f11 663 if (unlikely(!skb)) {
664 netdev_err(ndev, "alloc rx skb fail\n");
665 ring->stats.sw_err_cnt++;
666 return -ENOMEM;
667 }
668
9cbe9fd5 669 prefetchw(skb->data);
13ac695e
S		 670 length = le16_to_cpu(desc->rx.pkt_len);
671 bnum_flag = le32_to_cpu(desc->rx.ipoff_bnum_pid_flag);
672 priv->ops.get_rxd_bnum(bnum_flag, &bnum);
673 *out_bnum = bnum;
674
b5996f11 675 if (length <= HNS_RX_HEAD_SIZE) {
676 memcpy(__skb_put(skb, length), va, ALIGN(length, sizeof(long)));
677
678 /* we can reuse buffer as-is, just make sure it is local */
679 if (likely(page_to_nid(desc_cb->priv) == numa_node_id()))
680 desc_cb->reuse_flag = 1;
681 else /* this page cannot be reused so discard it */
682 put_page(desc_cb->priv);
683
684 ring_ptr_move_fw(ring, next_to_clean);
685
686 if (unlikely(bnum != 1)) { /* check err*/
687 *out_bnum = 1;
688 goto out_bnum_err;
689 }
690 } else {
691 ring->stats.seg_pkt_cnt++;
692
693 pull_len = hns_nic_get_headlen(va, bnum_flag, HNS_RX_HEAD_SIZE);
694 memcpy(__skb_put(skb, pull_len), va,
695 ALIGN(pull_len, sizeof(long)));
696
9cbe9fd5 697 hns_nic_reuse_page(skb, 0, ring, pull_len, desc_cb);
b5996f11 698 ring_ptr_move_fw(ring, next_to_clean);
699
700 if (unlikely(bnum >= (int)MAX_SKB_FRAGS)) { /* check err*/
701 *out_bnum = 1;
702 goto out_bnum_err;
703 }
704 for (i = 1; i < bnum; i++) {
705 desc = &ring->desc[ring->next_to_clean];
706 desc_cb = &ring->desc_cb[ring->next_to_clean];
b5996f11 707
9cbe9fd5 708 hns_nic_reuse_page(skb, i, ring, 0, desc_cb);
b5996f11 709 ring_ptr_move_fw(ring, next_to_clean);
710 }
711 }
712
713 /* check except process, free skb and jump the desc */
714 if (unlikely((!bnum) || (bnum > ring->max_desc_num_per_pkt))) {
715out_bnum_err:
716 *out_bnum = *out_bnum ? *out_bnum : 1; /* ntc moved,cannot 0*/
717 netdev_err(ndev, "invalid bnum(%d,%d,%d,%d),%016llx,%016llx\n",
718 bnum, ring->max_desc_num_per_pkt,
719 length, (int)MAX_SKB_FRAGS,
720 ((u64 *)desc)[0], ((u64 *)desc)[1]);
721 ring->stats.err_bd_num++;
722 dev_kfree_skb_any(skb);
723 return -EDOM;
724 }
725
726 bnum_flag = le32_to_cpu(desc->rx.ipoff_bnum_pid_flag);
727
728 if (unlikely(!hnae_get_bit(bnum_flag, HNS_RXD_VLD_B))) {
729 netdev_err(ndev, "no valid bd,%016llx,%016llx\n",
730 ((u64 *)desc)[0], ((u64 *)desc)[1]);
731 ring->stats.non_vld_descs++;
732 dev_kfree_skb_any(skb);
733 return -EINVAL;
734 }
735
736 if (unlikely((!desc->rx.pkt_len) ||
737 hnae_get_bit(bnum_flag, HNS_RXD_DROP_B))) {
b5996f11 738 ring->stats.err_pkt_len++;
739 dev_kfree_skb_any(skb);
740 return -EFAULT;
741 }
742
743 if (unlikely(hnae_get_bit(bnum_flag, HNS_RXD_L2E_B))) {
b5996f11 744 ring->stats.l2_err++;
745 dev_kfree_skb_any(skb);
746 return -EFAULT;
747 }
748
749 ring->stats.rx_pkts++;
750 ring->stats.rx_bytes += skb->len;
751
862b3d20
S		 752 /* indicate to upper stack if our hardware has already calculated
753 * the RX checksum
754 */
755 hns_nic_rx_checksum(ring_data, skb, bnum_flag);
b5996f11 756
757 return 0;
758}
759
760static void
761hns_nic_alloc_rx_buffers(struct hns_nic_ring_data *ring_data, int cleand_count)
762{
763 int i, ret;
764 struct hnae_desc_cb res_cbs;
765 struct hnae_desc_cb *desc_cb;
766 struct hnae_ring *ring = ring_data->ring;
767 struct net_device *ndev = ring_data->napi.dev;
768
769 for (i = 0; i < cleand_count; i++) {
770 desc_cb = &ring->desc_cb[ring->next_to_use];
771 if (desc_cb->reuse_flag) {
772 ring->stats.reuse_pg_cnt++;
773 hnae_reuse_buffer(ring, ring->next_to_use);
774 } else {
775 ret = hnae_reserve_buffer_map(ring, &res_cbs);
776 if (ret) {
777 ring->stats.sw_err_cnt++;
778 netdev_err(ndev, "hnae reserve buffer map failed.\n");
779 break;
780 }
781 hnae_replace_buffer(ring, ring->next_to_use, &res_cbs);
782 }
783
784 ring_ptr_move_fw(ring, next_to_use);
785 }
786
787 wmb(); /* make all data has been write before submit */
788 writel_relaxed(i, ring->io_base + RCB_REG_HEAD);
789}
790
791/* return error number for error or number of desc left to take
792 */
793static void hns_nic_rx_up_pro(struct hns_nic_ring_data *ring_data,
794 struct sk_buff *skb)
795{
796 struct net_device *ndev = ring_data->napi.dev;
797
798 skb->protocol = eth_type_trans(skb, ndev);
799 (void)napi_gro_receive(&ring_data->napi, skb);
800 ndev->last_rx = jiffies;
801}
802
0e97cd4e 803static int hns_desc_unused(struct hnae_ring *ring)
804{
805 int ntc = ring->next_to_clean;
806 int ntu = ring->next_to_use;
807
808 return ((ntc >= ntu) ? 0 : ring->desc_num) + ntc - ntu;
809}
810
b5996f11 811static int hns_nic_rx_poll_one(struct hns_nic_ring_data *ring_data,
812 int budget, void *v)
813{
814 struct hnae_ring *ring = ring_data->ring;
815 struct sk_buff *skb;
34447271 816 int num, bnum;
b5996f11 817#define RCB_NOF_ALLOC_RX_BUFF_ONCE 16
818 int recv_pkts, recv_bds, clean_count, err;
0e97cd4e 819 int unused_count = hns_desc_unused(ring);
b5996f11 820
821 num = readl_relaxed(ring->io_base + RCB_REG_FBDNUM);
822 rmb(); /* make sure num taken effect before the other data is touched */
823
824 recv_pkts = 0, recv_bds = 0, clean_count = 0;
0e97cd4e 825 num -= unused_count;
34447271 826
b5996f11 827 while (recv_pkts < budget && recv_bds < num) {
6ba312eb 828 /* reuse or realloc buffers */
0e97cd4e 829 if (clean_count + unused_count >= RCB_NOF_ALLOC_RX_BUFF_ONCE) {
830 hns_nic_alloc_rx_buffers(ring_data,
831 clean_count + unused_count);
b5996f11 832 clean_count = 0;
0e97cd4e 833 unused_count = hns_desc_unused(ring);
b5996f11 834 }
835
6ba312eb 836 /* poll one pkt */
b5996f11 837 err = hns_nic_poll_rx_skb(ring_data, &skb, &bnum);
838 if (unlikely(!skb)) /* this fault cannot be repaired */
3a31b64e 839 goto out;
b5996f11 840
841 recv_bds += bnum;
842 clean_count += bnum;
843 if (unlikely(err)) { /* do jump the err */
844 recv_pkts++;
845 continue;
846 }
847
848 /* do update ip stack process*/
849 ((void (*)(struct hns_nic_ring_data *, struct sk_buff *))v)(
850 ring_data, skb);
851 recv_pkts++;
852 }
853
3a31b64e 854out:
13ac695e 855 /* make all data has been write before submit */
0e97cd4e 856 if (clean_count + unused_count > 0)
857 hns_nic_alloc_rx_buffers(ring_data,
858 clean_count + unused_count);
13ac695e 859
b5996f11 860 return recv_pkts;
861}
862
863static void hns_nic_rx_fini_pro(struct hns_nic_ring_data *ring_data)
864{
865 struct hnae_ring *ring = ring_data->ring;
866 int num = 0;
867
cee5add4
DH		 868 ring_data->ring->q->handle->dev->ops->toggle_ring_irq(ring, 0);
869
b5996f11 870 /* for hardware bug fixed */
871 num = readl_relaxed(ring->io_base + RCB_REG_FBDNUM);
872
873 if (num > 0) {
874 ring_data->ring->q->handle->dev->ops->toggle_ring_irq(
875 ring_data->ring, 1);
876
877 napi_schedule(&ring_data->napi);
878 }
879}
880
cee5add4
DH		 881static void hns_nic_rx_fini_pro_v2(struct hns_nic_ring_data *ring_data)
882{
883 struct hnae_ring *ring = ring_data->ring;
884 int num = 0;
885
886 num = readl_relaxed(ring->io_base + RCB_REG_FBDNUM);
887
888 if (num == 0)
889 ring_data->ring->q->handle->dev->ops->toggle_ring_irq(
890 ring, 0);
891 else
892 napi_schedule(&ring_data->napi);
893}
894
b5996f11 895static inline void hns_nic_reclaim_one_desc(struct hnae_ring *ring,
896 int *bytes, int *pkts)
897{
898 struct hnae_desc_cb *desc_cb = &ring->desc_cb[ring->next_to_clean];
899
900 (*pkts) += (desc_cb->type == DESC_TYPE_SKB);
901 (*bytes) += desc_cb->length;
902 /* desc_cb will be cleaned, after hnae_free_buffer_detach*/
903 hnae_free_buffer_detach(ring, ring->next_to_clean);
904
905 ring_ptr_move_fw(ring, next_to_clean);
906}
907
908static int is_valid_clean_head(struct hnae_ring *ring, int h)
909{
910 int u = ring->next_to_use;
911 int c = ring->next_to_clean;
912
913 if (unlikely(h > ring->desc_num))
914 return 0;
915
916 assert(u > 0 && u < ring->desc_num);
917 assert(c > 0 && c < ring->desc_num);
918 assert(u != c && h != c); /* must be checked before call this func */
919
920 return u > c ? (h > c && h <= u) : (h > c || h <= u);
921}
922
923/* netif_tx_lock will turn down the performance, set only when necessary */
924#ifdef CONFIG_NET_POLL_CONTROLLER
925#define NETIF_TX_LOCK(ndev) netif_tx_lock(ndev)
926#define NETIF_TX_UNLOCK(ndev) netif_tx_unlock(ndev)
927#else
928#define NETIF_TX_LOCK(ndev)
929#define NETIF_TX_UNLOCK(ndev)
930#endif
931/* reclaim all desc in one budget
932 * return error or number of desc left
933 */
934static int hns_nic_tx_poll_one(struct hns_nic_ring_data *ring_data,
935 int budget, void *v)
936{
937 struct hnae_ring *ring = ring_data->ring;
938 struct net_device *ndev = ring_data->napi.dev;
939 struct netdev_queue *dev_queue;
940 struct hns_nic_priv *priv = netdev_priv(ndev);
941 int head;
942 int bytes, pkts;
943
944 NETIF_TX_LOCK(ndev);
945
946 head = readl_relaxed(ring->io_base + RCB_REG_HEAD);
947 rmb(); /* make sure head is ready before touch any data */
948
949 if (is_ring_empty(ring) || head == ring->next_to_clean) {
950 NETIF_TX_UNLOCK(ndev);
951 return 0; /* no data to poll */
952 }
953
954 if (!is_valid_clean_head(ring, head)) {
955 netdev_err(ndev, "wrong head (%d, %d-%d)\n", head,
956 ring->next_to_use, ring->next_to_clean);
957 ring->stats.io_err_cnt++;
958 NETIF_TX_UNLOCK(ndev);
959 return -EIO;
960 }
961
962 bytes = 0;
963 pkts = 0;
9cbe9fd5 964 while (head != ring->next_to_clean) {
b5996f11 965 hns_nic_reclaim_one_desc(ring, &bytes, &pkts);
9cbe9fd5 966 /* issue prefetch for next Tx descriptor */
967 prefetch(&ring->desc_cb[ring->next_to_clean]);
968 }
b5996f11 969
970 NETIF_TX_UNLOCK(ndev);
971
972 dev_queue = netdev_get_tx_queue(ndev, ring_data->queue_index);
973 netdev_tx_completed_queue(dev_queue, pkts, bytes);
974
13ac695e
S		 975 if (unlikely(priv->link && !netif_carrier_ok(ndev)))
976 netif_carrier_on(ndev);
977
b5996f11 978 if (unlikely(pkts && netif_carrier_ok(ndev) &&
979 (ring_space(ring) >= ring->max_desc_num_per_pkt * 2))) {
980 /* Make sure that anybody stopping the queue after this
981 * sees the new next_to_clean.
982 */
983 smp_mb();
984 if (netif_tx_queue_stopped(dev_queue) &&
985 !test_bit(NIC_STATE_DOWN, &priv->state)) {
986 netif_tx_wake_queue(dev_queue);
987 ring->stats.restart_queue++;
988 }
989 }
990 return 0;
991}
992
993static void hns_nic_tx_fini_pro(struct hns_nic_ring_data *ring_data)
994{
995 struct hnae_ring *ring = ring_data->ring;
cee5add4
DH		 996 int head;
997
998 ring_data->ring->q->handle->dev->ops->toggle_ring_irq(ring, 0);
999
1000 head = readl_relaxed(ring->io_base + RCB_REG_HEAD);
b5996f11 1001
1002 if (head != ring->next_to_clean) {
1003 ring_data->ring->q->handle->dev->ops->toggle_ring_irq(
1004 ring_data->ring, 1);
1005
1006 napi_schedule(&ring_data->napi);
1007 }
1008}
1009
cee5add4
DH		 1010static void hns_nic_tx_fini_pro_v2(struct hns_nic_ring_data *ring_data)
1011{
1012 struct hnae_ring *ring = ring_data->ring;
1013 int head = readl_relaxed(ring->io_base + RCB_REG_HEAD);
1014
1015 if (head == ring->next_to_clean)
1016 ring_data->ring->q->handle->dev->ops->toggle_ring_irq(
1017 ring, 0);
1018 else
1019 napi_schedule(&ring_data->napi);
1020}
1021
b5996f11 1022static void hns_nic_tx_clr_all_bufs(struct hns_nic_ring_data *ring_data)
1023{
1024 struct hnae_ring *ring = ring_data->ring;
1025 struct net_device *ndev = ring_data->napi.dev;
1026 struct netdev_queue *dev_queue;
1027 int head;
1028 int bytes, pkts;
1029
1030 NETIF_TX_LOCK(ndev);
1031
1032 head = ring->next_to_use; /* ntu :soft setted ring position*/
1033 bytes = 0;
1034 pkts = 0;
1035 while (head != ring->next_to_clean)
1036 hns_nic_reclaim_one_desc(ring, &bytes, &pkts);
1037
1038 NETIF_TX_UNLOCK(ndev);
1039
1040 dev_queue = netdev_get_tx_queue(ndev, ring_data->queue_index);
1041 netdev_tx_reset_queue(dev_queue);
1042}
1043
1044static int hns_nic_common_poll(struct napi_struct *napi, int budget)
1045{
1046 struct hns_nic_ring_data *ring_data =
1047 container_of(napi, struct hns_nic_ring_data, napi);
1048 int clean_complete = ring_data->poll_one(
1049 ring_data, budget, ring_data->ex_process);
1050
1051 if (clean_complete >= 0 && clean_complete < budget) {
1052 napi_complete(napi);
cee5add4 1053 ring_data->fini_process(ring_data);
9cbe9fd5 1054 return 0;
b5996f11 1055 }
1056
1057 return clean_complete;
1058}
1059
1060static irqreturn_t hns_irq_handle(int irq, void *dev)
1061{
1062 struct hns_nic_ring_data *ring_data = (struct hns_nic_ring_data *)dev;
1063
1064 ring_data->ring->q->handle->dev->ops->toggle_ring_irq(
1065 ring_data->ring, 1);
1066 napi_schedule(&ring_data->napi);
1067
1068 return IRQ_HANDLED;
1069}
1070
1071/**
1072 *hns_nic_adjust_link - adjust net work mode by the phy stat or new param
1073 *@ndev: net device
1074 */
1075static void hns_nic_adjust_link(struct net_device *ndev)
1076{
1077 struct hns_nic_priv *priv = netdev_priv(ndev);
1078 struct hnae_handle *h = priv->ae_handle;
bb7189dc
QX		 1079 int state = 1;
1080
262b38cd 1081 if (ndev->phydev) {
bb7189dc
QX		 1082 h->dev->ops->adjust_link(h, ndev->phydev->speed,
1083 ndev->phydev->duplex);
262b38cd 1084 state = ndev->phydev->link;
bb7189dc
QX		 1085 }
1086 state = state && h->dev->ops->get_status(h);
b5996f11 1087
bb7189dc
QX		 1088 if (state != priv->link) {
1089 if (state) {
1090 netif_carrier_on(ndev);
1091 netif_tx_wake_all_queues(ndev);
1092 netdev_info(ndev, "link up\n");
1093 } else {
1094 netif_carrier_off(ndev);
1095 netdev_info(ndev, "link down\n");
1096 }
1097 priv->link = state;
1098 }
b5996f11 1099}
1100
1101/**
1102 *hns_nic_init_phy - init phy
1103 *@ndev: net device
1104 *@h: ae handle
1105 * Return 0 on success, negative on failure
1106 */
1107int hns_nic_init_phy(struct net_device *ndev, struct hnae_handle *h)
1108{
652d39b0
KY		 1109 struct phy_device *phy_dev = h->phy_dev;
1110 int ret;
b5996f11 1111
652d39b0 1112 if (!h->phy_dev)
b5996f11 1113 return 0;
1114
652d39b0
KY		 1115 if (h->phy_if != PHY_INTERFACE_MODE_XGMII) {
1116 phy_dev->dev_flags = 0;
b5996f11 1117
652d39b0
KY		 1118 ret = phy_connect_direct(ndev, phy_dev, hns_nic_adjust_link,
1119 h->phy_if);
1120 } else {
1121 ret = phy_attach_direct(ndev, phy_dev, 0, h->phy_if);
1122 }
1123 if (unlikely(ret))
1124 return -ENODEV;
b5996f11 1125
1126 phy_dev->supported &= h->if_support;
1127 phy_dev->advertising = phy_dev->supported;
1128
1129 if (h->phy_if == PHY_INTERFACE_MODE_XGMII)
1130 phy_dev->autoneg = false;
1131
b5996f11 1132 return 0;
1133}
1134
1135static int hns_nic_ring_open(struct net_device *netdev, int idx)
1136{
1137 struct hns_nic_priv *priv = netdev_priv(netdev);
1138 struct hnae_handle *h = priv->ae_handle;
1139
1140 napi_enable(&priv->ring_data[idx].napi);
1141
1142 enable_irq(priv->ring_data[idx].ring->irq);
1143 h->dev->ops->toggle_ring_irq(priv->ring_data[idx].ring, 0);
1144
1145 return 0;
1146}
1147
1148static int hns_nic_net_set_mac_address(struct net_device *ndev, void *p)
1149{
1150 struct hns_nic_priv *priv = netdev_priv(ndev);
1151 struct hnae_handle *h = priv->ae_handle;
1152 struct sockaddr *mac_addr = p;
1153 int ret;
1154
1155 if (!mac_addr || !is_valid_ether_addr((const u8 *)mac_addr->sa_data))
1156 return -EADDRNOTAVAIL;
1157
1158 ret = h->dev->ops->set_mac_addr(h, mac_addr->sa_data);
1159 if (ret) {
1160 netdev_err(ndev, "set_mac_address fail, ret=%d!\n", ret);
1161 return ret;
1162 }
1163
1164 memcpy(ndev->dev_addr, mac_addr->sa_data, ndev->addr_len);
1165
1166 return 0;
1167}
1168
1169void hns_nic_update_stats(struct net_device *netdev)
1170{
1171 struct hns_nic_priv *priv = netdev_priv(netdev);
1172 struct hnae_handle *h = priv->ae_handle;
1173
1174 h->dev->ops->update_stats(h, &netdev->stats);
1175}
1176
1177/* set mac addr if it is configed. or leave it to the AE driver */
1178static void hns_init_mac_addr(struct net_device *ndev)
1179{
1180 struct hns_nic_priv *priv = netdev_priv(ndev);
b5996f11 1181
6162928c 1182 if (!device_get_mac_address(priv->dev, ndev->dev_addr, ETH_ALEN)) {
b5996f11 1183 eth_hw_addr_random(ndev);
1184 dev_warn(priv->dev, "No valid mac, use random mac %pM",
1185 ndev->dev_addr);
1186 }
1187}
1188
1189static void hns_nic_ring_close(struct net_device *netdev, int idx)
1190{
1191 struct hns_nic_priv *priv = netdev_priv(netdev);
1192 struct hnae_handle *h = priv->ae_handle;
1193
1194 h->dev->ops->toggle_ring_irq(priv->ring_data[idx].ring, 1);
1195 disable_irq(priv->ring_data[idx].ring->irq);
1196
1197 napi_disable(&priv->ring_data[idx].napi);
1198}
1199
13ac695e 1200static void hns_set_irq_affinity(struct hns_nic_priv *priv)
b5996f11 1201{
1202 struct hnae_handle *h = priv->ae_handle;
1203 struct hns_nic_ring_data *rd;
1204 int i;
b5996f11 1205 int cpu;
1206 cpumask_t mask;
1207
13ac695e
S		 1208 /*diffrent irq banlance for 16core and 32core*/
1209 if (h->q_num == num_possible_cpus()) {
1210 for (i = 0; i < h->q_num * 2; i++) {
1211 rd = &priv->ring_data[i];
1212 if (cpu_online(rd->queue_index)) {
1213 cpumask_clear(&mask);
1214 cpu = rd->queue_index;
1215 cpumask_set_cpu(cpu, &mask);
1216 (void)irq_set_affinity_hint(rd->ring->irq,
1217 &mask);
1218 }
1219 }
1220 } else {
1221 for (i = 0; i < h->q_num; i++) {
1222 rd = &priv->ring_data[i];
1223 if (cpu_online(rd->queue_index * 2)) {
1224 cpumask_clear(&mask);
1225 cpu = rd->queue_index * 2;
1226 cpumask_set_cpu(cpu, &mask);
1227 (void)irq_set_affinity_hint(rd->ring->irq,
1228 &mask);
1229 }
1230 }
1231
1232 for (i = h->q_num; i < h->q_num * 2; i++) {
1233 rd = &priv->ring_data[i];
1234 if (cpu_online(rd->queue_index * 2 + 1)) {
1235 cpumask_clear(&mask);
1236 cpu = rd->queue_index * 2 + 1;
1237 cpumask_set_cpu(cpu, &mask);
1238 (void)irq_set_affinity_hint(rd->ring->irq,
1239 &mask);
1240 }
1241 }
1242 }
1243}
1244
1245static int hns_nic_init_irq(struct hns_nic_priv *priv)
1246{
1247 struct hnae_handle *h = priv->ae_handle;
1248 struct hns_nic_ring_data *rd;
1249 int i;
1250 int ret;
1251
b5996f11 1252 for (i = 0; i < h->q_num * 2; i++) {
1253 rd = &priv->ring_data[i];
1254
1255 if (rd->ring->irq_init_flag == RCB_IRQ_INITED)
1256 break;
1257
1258 snprintf(rd->ring->ring_name, RCB_RING_NAME_LEN,
1259 "%s-%s%d", priv->netdev->name,
1260 (i < h->q_num ? "tx" : "rx"), rd->queue_index);
1261
1262 rd->ring->ring_name[RCB_RING_NAME_LEN - 1] = '\0';
1263
1264 ret = request_irq(rd->ring->irq,
1265 hns_irq_handle, 0, rd->ring->ring_name, rd);
1266 if (ret) {
1267 netdev_err(priv->netdev, "request irq(%d) fail\n",
1268 rd->ring->irq);
1269 return ret;
1270 }
1271 disable_irq(rd->ring->irq);
1272 rd->ring->irq_init_flag = RCB_IRQ_INITED;
b5996f11 1273 }
1274
13ac695e
S		 1275 /*set cpu affinity*/
1276 hns_set_irq_affinity(priv);
1277
b5996f11 1278 return 0;
1279}
1280
1281static int hns_nic_net_up(struct net_device *ndev)
1282{
1283 struct hns_nic_priv *priv = netdev_priv(ndev);
1284 struct hnae_handle *h = priv->ae_handle;
454784d8 1285 int i, j;
b5996f11 1286 int ret;
1287
1288 ret = hns_nic_init_irq(priv);
1289 if (ret != 0) {
1290 netdev_err(ndev, "hns init irq failed! ret=%d\n", ret);
1291 return ret;
1292 }
1293
1294 for (i = 0; i < h->q_num * 2; i++) {
1295 ret = hns_nic_ring_open(ndev, i);
1296 if (ret)
1297 goto out_has_some_queues;
1298 }
1299
b5996f11 1300 ret = h->dev->ops->set_mac_addr(h, ndev->dev_addr);
1301 if (ret)
1302 goto out_set_mac_addr_err;
1303
1304 ret = h->dev->ops->start ? h->dev->ops->start(h) : 0;
1305 if (ret)
1306 goto out_start_err;
1307
262b38cd
PR		 1308 if (ndev->phydev)
1309 phy_start(ndev->phydev);
b5996f11 1310
1311 clear_bit(NIC_STATE_DOWN, &priv->state);
1312 (void)mod_timer(&priv->service_timer, jiffies + SERVICE_TIMER_HZ);
1313
1314 return 0;
1315
1316out_start_err:
1317 netif_stop_queue(ndev);
1318out_set_mac_addr_err:
b5996f11 1319out_has_some_queues:
1320 for (j = i - 1; j >= 0; j--)
1321 hns_nic_ring_close(ndev, j);
1322
1323 set_bit(NIC_STATE_DOWN, &priv->state);
1324
1325 return ret;
1326}
1327
1328static void hns_nic_net_down(struct net_device *ndev)
1329{
1330 int i;
1331 struct hnae_ae_ops *ops;
1332 struct hns_nic_priv *priv = netdev_priv(ndev);
1333
1334 if (test_and_set_bit(NIC_STATE_DOWN, &priv->state))
1335 return;
1336
1337 (void)del_timer_sync(&priv->service_timer);
1338 netif_tx_stop_all_queues(ndev);
1339 netif_carrier_off(ndev);
1340 netif_tx_disable(ndev);
1341 priv->link = 0;
1342
262b38cd
PR		 1343 if (ndev->phydev)
1344 phy_stop(ndev->phydev);
b5996f11 1345
1346 ops = priv->ae_handle->dev->ops;
1347
1348 if (ops->stop)
1349 ops->stop(priv->ae_handle);
1350
1351 netif_tx_stop_all_queues(ndev);
1352
1353 for (i = priv->ae_handle->q_num - 1; i >= 0; i--) {
1354 hns_nic_ring_close(ndev, i);
1355 hns_nic_ring_close(ndev, i + priv->ae_handle->q_num);
1356
1357 /* clean tx buffers*/
1358 hns_nic_tx_clr_all_bufs(priv->ring_data + i);
1359 }
1360}
1361
1362void hns_nic_net_reset(struct net_device *ndev)
1363{
1364 struct hns_nic_priv *priv = netdev_priv(ndev);
1365 struct hnae_handle *handle = priv->ae_handle;
1366
1367 while (test_and_set_bit(NIC_STATE_RESETTING, &priv->state))
1368 usleep_range(1000, 2000);
1369
1370 (void)hnae_reinit_handle(handle);
1371
1372 clear_bit(NIC_STATE_RESETTING, &priv->state);
1373}
1374
1375void hns_nic_net_reinit(struct net_device *netdev)
1376{
1377 struct hns_nic_priv *priv = netdev_priv(netdev);
1378
860e9538 1379 netif_trans_update(priv->netdev);
b5996f11 1380 while (test_and_set_bit(NIC_STATE_REINITING, &priv->state))
1381 usleep_range(1000, 2000);
1382
1383 hns_nic_net_down(netdev);
1384 hns_nic_net_reset(netdev);
1385 (void)hns_nic_net_up(netdev);
1386 clear_bit(NIC_STATE_REINITING, &priv->state);
1387}
1388
1389static int hns_nic_net_open(struct net_device *ndev)
1390{
1391 struct hns_nic_priv *priv = netdev_priv(ndev);
1392 struct hnae_handle *h = priv->ae_handle;
1393 int ret;
1394
1395 if (test_bit(NIC_STATE_TESTING, &priv->state))
1396 return -EBUSY;
1397
1398 priv->link = 0;
1399 netif_carrier_off(ndev);
1400
1401 ret = netif_set_real_num_tx_queues(ndev, h->q_num);
1402 if (ret < 0) {
1403 netdev_err(ndev, "netif_set_real_num_tx_queues fail, ret=%d!\n",
1404 ret);
1405 return ret;
1406 }
1407
1408 ret = netif_set_real_num_rx_queues(ndev, h->q_num);
1409 if (ret < 0) {
1410 netdev_err(ndev,
1411 "netif_set_real_num_rx_queues fail, ret=%d!\n", ret);
1412 return ret;
1413 }
1414
1415 ret = hns_nic_net_up(ndev);
1416 if (ret) {
1417 netdev_err(ndev,
1418 "hns net up fail, ret=%d!\n", ret);
1419 return ret;
1420 }
1421
1422 return 0;
1423}
1424
1425static int hns_nic_net_stop(struct net_device *ndev)
1426{
1427 hns_nic_net_down(ndev);
1428
1429 return 0;
1430}
1431
1432static void hns_tx_timeout_reset(struct hns_nic_priv *priv);
1433static void hns_nic_net_timeout(struct net_device *ndev)
1434{
1435 struct hns_nic_priv *priv = netdev_priv(ndev);
1436
1437 hns_tx_timeout_reset(priv);
1438}
1439
1440static int hns_nic_do_ioctl(struct net_device *netdev, struct ifreq *ifr,
1441 int cmd)
1442{
262b38cd 1443 struct phy_device *phy_dev = netdev->phydev;
b5996f11 1444
1445 if (!netif_running(netdev))
1446 return -EINVAL;
1447
1448 if (!phy_dev)
1449 return -ENOTSUPP;
1450
1451 return phy_mii_ioctl(phy_dev, ifr, cmd);
1452}
1453
1454/* use only for netconsole to poll with the device without interrupt */
1455#ifdef CONFIG_NET_POLL_CONTROLLER
1456void hns_nic_poll_controller(struct net_device *ndev)
1457{
1458 struct hns_nic_priv *priv = netdev_priv(ndev);
1459 unsigned long flags;
1460 int i;
1461
1462 local_irq_save(flags);
1463 for (i = 0; i < priv->ae_handle->q_num * 2; i++)
1464 napi_schedule(&priv->ring_data[i].napi);
1465 local_irq_restore(flags);
1466}
1467#endif
1468
1469static netdev_tx_t hns_nic_net_xmit(struct sk_buff *skb,
1470 struct net_device *ndev)
1471{
1472 struct hns_nic_priv *priv = netdev_priv(ndev);
1473 int ret;
1474
1475 assert(skb->queue_mapping < ndev->ae_handle->q_num);
1476 ret = hns_nic_net_xmit_hw(ndev, skb,
1477 &tx_ring_data(priv, skb->queue_mapping));
1478 if (ret == NETDEV_TX_OK) {
860e9538 1479 netif_trans_update(ndev);
b5996f11 1480 ndev->stats.tx_bytes += skb->len;
1481 ndev->stats.tx_packets++;
1482 }
1483 return (netdev_tx_t)ret;
1484}
1485
1486static int hns_nic_change_mtu(struct net_device *ndev, int new_mtu)
1487{
1488 struct hns_nic_priv *priv = netdev_priv(ndev);
1489 struct hnae_handle *h = priv->ae_handle;
1490 int ret;
1491
b5996f11 1492 if (!h->dev->ops->set_mtu)
1493 return -ENOTSUPP;
1494
1495 if (netif_running(ndev)) {
1496 (void)hns_nic_net_stop(ndev);
1497 msleep(100);
1498
1499 ret = h->dev->ops->set_mtu(h, new_mtu);
1500 if (ret)
1501 netdev_err(ndev, "set mtu fail, return value %d\n",
1502 ret);
1503
1504 if (hns_nic_net_open(ndev))
1505 netdev_err(ndev, "hns net open fail\n");
1506 } else {
1507 ret = h->dev->ops->set_mtu(h, new_mtu);
1508 }
1509
1510 if (!ret)
1511 ndev->mtu = new_mtu;
1512
1513 return ret;
1514}
1515
38f616da
S		 1516static int hns_nic_set_features(struct net_device *netdev,
1517 netdev_features_t features)
1518{
1519 struct hns_nic_priv *priv = netdev_priv(netdev);
38f616da
S		 1520
1521 switch (priv->enet_ver) {
1522 case AE_VERSION_1:
1523 if (features & (NETIF_F_TSO | NETIF_F_TSO6))
1524 netdev_info(netdev, "enet v1 do not support tso!\n");
1525 break;
1526 default:
1527 if (features & (NETIF_F_TSO | NETIF_F_TSO6)) {
1528 priv->ops.fill_desc = fill_tso_desc;
1529 priv->ops.maybe_stop_tx = hns_nic_maybe_stop_tso;
1530 /* The chip only support 7*4096 */
1531 netif_set_gso_max_size(netdev, 7 * 4096);
38f616da
S		 1532 } else {
1533 priv->ops.fill_desc = fill_v2_desc;
1534 priv->ops.maybe_stop_tx = hns_nic_maybe_stop_tx;
38f616da
S		 1535 }
1536 break;
1537 }
1538 netdev->features = features;
1539 return 0;
1540}
1541
1542static netdev_features_t hns_nic_fix_features(
1543 struct net_device *netdev, netdev_features_t features)
1544{
1545 struct hns_nic_priv *priv = netdev_priv(netdev);
1546
1547 switch (priv->enet_ver) {
1548 case AE_VERSION_1:
1549 features &= ~(NETIF_F_TSO | NETIF_F_TSO6 |
1550 NETIF_F_HW_VLAN_CTAG_FILTER);
1551 break;
1552 default:
1553 break;
1554 }
1555 return features;
1556}
1557
66355f52
KY		 1558static int hns_nic_uc_sync(struct net_device *netdev, const unsigned char *addr)
1559{
1560 struct hns_nic_priv *priv = netdev_priv(netdev);
1561 struct hnae_handle *h = priv->ae_handle;
1562
1563 if (h->dev->ops->add_uc_addr)
1564 return h->dev->ops->add_uc_addr(h, addr);
1565
1566 return 0;
1567}
1568
1569static int hns_nic_uc_unsync(struct net_device *netdev,
1570 const unsigned char *addr)
1571{
1572 struct hns_nic_priv *priv = netdev_priv(netdev);
1573 struct hnae_handle *h = priv->ae_handle;
1574
1575 if (h->dev->ops->rm_uc_addr)
1576 return h->dev->ops->rm_uc_addr(h, addr);
1577
1578 return 0;
1579}
1580
b5996f11 1581/**
1582 * nic_set_multicast_list - set mutl mac address
1583 * @netdev: net device
1584 * @p: mac address
1585 *
1586 * return void
1587 */
1588void hns_set_multicast_list(struct net_device *ndev)
1589{
1590 struct hns_nic_priv *priv = netdev_priv(ndev);
1591 struct hnae_handle *h = priv->ae_handle;
1592 struct netdev_hw_addr *ha = NULL;
1593
1594 if (!h) {
1595 netdev_err(ndev, "hnae handle is null\n");
1596 return;
1597 }
1598
ec2cafe6
KY		 1599 if (h->dev->ops->clr_mc_addr)
1600 if (h->dev->ops->clr_mc_addr(h))
1601 netdev_err(ndev, "clear multicast address fail\n");
1602
b5996f11 1603 if (h->dev->ops->set_mc_addr) {
1604 netdev_for_each_mc_addr(ha, ndev)
1605 if (h->dev->ops->set_mc_addr(h, ha->addr))
1606 netdev_err(ndev, "set multicast fail\n");
1607 }
1608}
1609
4568637f 1610void hns_nic_set_rx_mode(struct net_device *ndev)
1611{
1612 struct hns_nic_priv *priv = netdev_priv(ndev);
1613 struct hnae_handle *h = priv->ae_handle;
1614
1615 if (h->dev->ops->set_promisc_mode) {
1616 if (ndev->flags & IFF_PROMISC)
1617 h->dev->ops->set_promisc_mode(h, 1);
1618 else
1619 h->dev->ops->set_promisc_mode(h, 0);
1620 }
1621
1622 hns_set_multicast_list(ndev);
66355f52
KY		 1623
1624 if (__dev_uc_sync(ndev, hns_nic_uc_sync, hns_nic_uc_unsync))
1625 netdev_err(ndev, "sync uc address fail\n");
4568637f 1626}
1627
b5996f11 1628struct rtnl_link_stats64 *hns_nic_get_stats64(struct net_device *ndev,
1629 struct rtnl_link_stats64 *stats)
1630{
1631 int idx = 0;
1632 u64 tx_bytes = 0;
1633 u64 rx_bytes = 0;
1634 u64 tx_pkts = 0;
1635 u64 rx_pkts = 0;
1636 struct hns_nic_priv *priv = netdev_priv(ndev);
1637 struct hnae_handle *h = priv->ae_handle;
1638
1639 for (idx = 0; idx < h->q_num; idx++) {
1640 tx_bytes += h->qs[idx]->tx_ring.stats.tx_bytes;
1641 tx_pkts += h->qs[idx]->tx_ring.stats.tx_pkts;
1642 rx_bytes += h->qs[idx]->rx_ring.stats.rx_bytes;
1643 rx_pkts += h->qs[idx]->rx_ring.stats.rx_pkts;
1644 }
1645
1646 stats->tx_bytes = tx_bytes;
1647 stats->tx_packets = tx_pkts;
1648 stats->rx_bytes = rx_bytes;
1649 stats->rx_packets = rx_pkts;
1650
1651 stats->rx_errors = ndev->stats.rx_errors;
1652 stats->multicast = ndev->stats.multicast;
1653 stats->rx_length_errors = ndev->stats.rx_length_errors;
1654 stats->rx_crc_errors = ndev->stats.rx_crc_errors;
1655 stats->rx_missed_errors = ndev->stats.rx_missed_errors;
1656
1657 stats->tx_errors = ndev->stats.tx_errors;
1658 stats->rx_dropped = ndev->stats.rx_dropped;
1659 stats->tx_dropped = ndev->stats.tx_dropped;
1660 stats->collisions = ndev->stats.collisions;
1661 stats->rx_over_errors = ndev->stats.rx_over_errors;
1662 stats->rx_frame_errors = ndev->stats.rx_frame_errors;
1663 stats->rx_fifo_errors = ndev->stats.rx_fifo_errors;
1664 stats->tx_aborted_errors = ndev->stats.tx_aborted_errors;
1665 stats->tx_carrier_errors = ndev->stats.tx_carrier_errors;
1666 stats->tx_fifo_errors = ndev->stats.tx_fifo_errors;
1667 stats->tx_heartbeat_errors = ndev->stats.tx_heartbeat_errors;
1668 stats->tx_window_errors = ndev->stats.tx_window_errors;
1669 stats->rx_compressed = ndev->stats.rx_compressed;
1670 stats->tx_compressed = ndev->stats.tx_compressed;
1671
1672 return stats;
1673}
1674
2162a4a1
DH		 1675static u16
1676hns_nic_select_queue(struct net_device *ndev, struct sk_buff *skb,
1677 void *accel_priv, select_queue_fallback_t fallback)
1678{
1679 struct ethhdr *eth_hdr = (struct ethhdr *)skb->data;
1680 struct hns_nic_priv *priv = netdev_priv(ndev);
1681
1682 /* fix hardware broadcast/multicast packets queue loopback */
1683 if (!AE_IS_VER1(priv->enet_ver) &&
1684 is_multicast_ether_addr(eth_hdr->h_dest))
1685 return 0;
1686 else
1687 return fallback(ndev, skb);
1688}
1689
b5996f11 1690static const struct net_device_ops hns_nic_netdev_ops = {
1691 .ndo_open = hns_nic_net_open,
1692 .ndo_stop = hns_nic_net_stop,
1693 .ndo_start_xmit = hns_nic_net_xmit,
1694 .ndo_tx_timeout = hns_nic_net_timeout,
1695 .ndo_set_mac_address = hns_nic_net_set_mac_address,
1696 .ndo_change_mtu = hns_nic_change_mtu,
1697 .ndo_do_ioctl = hns_nic_do_ioctl,
38f616da
S		 1698 .ndo_set_features = hns_nic_set_features,
1699 .ndo_fix_features = hns_nic_fix_features,
b5996f11 1700 .ndo_get_stats64 = hns_nic_get_stats64,
1701#ifdef CONFIG_NET_POLL_CONTROLLER
1702 .ndo_poll_controller = hns_nic_poll_controller,
1703#endif
4568637f 1704 .ndo_set_rx_mode = hns_nic_set_rx_mode,
2162a4a1 1705 .ndo_select_queue = hns_nic_select_queue,
b5996f11 1706};
1707
1708static void hns_nic_update_link_status(struct net_device *netdev)
1709{
1710 struct hns_nic_priv *priv = netdev_priv(netdev);
1711
1712 struct hnae_handle *h = priv->ae_handle;
b5996f11 1713
bb7189dc
QX		 1714 if (h->phy_dev) {
1715 if (h->phy_if != PHY_INTERFACE_MODE_XGMII)
1716 return;
b5996f11 1717
bb7189dc 1718 (void)genphy_read_status(h->phy_dev);
b5996f11 1719 }
bb7189dc 1720 hns_nic_adjust_link(netdev);
b5996f11 1721}
1722
1723/* for dumping key regs*/
1724static void hns_nic_dump(struct hns_nic_priv *priv)
1725{
1726 struct hnae_handle *h = priv->ae_handle;
1727 struct hnae_ae_ops *ops = h->dev->ops;
1728 u32 *data, reg_num, i;
1729
1730 if (ops->get_regs_len && ops->get_regs) {
1731 reg_num = ops->get_regs_len(priv->ae_handle);
1732 reg_num = (reg_num + 3ul) & ~3ul;
1733 data = kcalloc(reg_num, sizeof(u32), GFP_KERNEL);
1734 if (data) {
1735 ops->get_regs(priv->ae_handle, data);
1736 for (i = 0; i < reg_num; i += 4)
1737 pr_info("0x%08x: 0x%08x 0x%08x 0x%08x 0x%08x\n",
1738 i, data[i], data[i + 1],
1739 data[i + 2], data[i + 3]);
1740 kfree(data);
1741 }
1742 }
1743
1744 for (i = 0; i < h->q_num; i++) {
1745 pr_info("tx_queue%d_next_to_clean:%d\n",
1746 i, h->qs[i]->tx_ring.next_to_clean);
1747 pr_info("tx_queue%d_next_to_use:%d\n",
1748 i, h->qs[i]->tx_ring.next_to_use);
1749 pr_info("rx_queue%d_next_to_clean:%d\n",
1750 i, h->qs[i]->rx_ring.next_to_clean);
1751 pr_info("rx_queue%d_next_to_use:%d\n",
1752 i, h->qs[i]->rx_ring.next_to_use);
1753 }
1754}
1755
f7211729 1756/* for resetting subtask */
b5996f11 1757static void hns_nic_reset_subtask(struct hns_nic_priv *priv)
1758{
1759 enum hnae_port_type type = priv->ae_handle->port_type;
1760
1761 if (!test_bit(NIC_STATE2_RESET_REQUESTED, &priv->state))
1762 return;
1763 clear_bit(NIC_STATE2_RESET_REQUESTED, &priv->state);
1764
1765 /* If we're already down, removing or resetting, just bail */
1766 if (test_bit(NIC_STATE_DOWN, &priv->state) ||
1767 test_bit(NIC_STATE_REMOVING, &priv->state) ||
1768 test_bit(NIC_STATE_RESETTING, &priv->state))
1769 return;
1770
1771 hns_nic_dump(priv);
13ac695e
S		 1772 netdev_info(priv->netdev, "try to reset %s port!\n",
1773 (type == HNAE_PORT_DEBUG ? "debug" : "service"));
b5996f11 1774
1775 rtnl_lock();
90a505b9 1776 /* put off any impending NetWatchDogTimeout */
860e9538 1777 netif_trans_update(priv->netdev);
90a505b9 1778
13ac695e 1779 if (type == HNAE_PORT_DEBUG) {
b5996f11 1780 hns_nic_net_reinit(priv->netdev);
13ac695e
S		 1781 } else {
1782 netif_carrier_off(priv->netdev);
1783 netif_tx_disable(priv->netdev);
1784 }
b5996f11 1785 rtnl_unlock();
1786}
1787
1788/* for doing service complete*/
1789static void hns_nic_service_event_complete(struct hns_nic_priv *priv)
1790{
13ac695e 1791 WARN_ON(!test_bit(NIC_STATE_SERVICE_SCHED, &priv->state));
b5996f11 1792
1793 smp_mb__before_atomic();
1794 clear_bit(NIC_STATE_SERVICE_SCHED, &priv->state);
1795}
1796
1797static void hns_nic_service_task(struct work_struct *work)
1798{
1799 struct hns_nic_priv *priv
1800 = container_of(work, struct hns_nic_priv, service_task);
1801 struct hnae_handle *h = priv->ae_handle;
1802
1803 hns_nic_update_link_status(priv->netdev);
1804 h->dev->ops->update_led_status(h);
1805 hns_nic_update_stats(priv->netdev);
1806
1807 hns_nic_reset_subtask(priv);
1808 hns_nic_service_event_complete(priv);
1809}
1810
1811static void hns_nic_task_schedule(struct hns_nic_priv *priv)
1812{
1813 if (!test_bit(NIC_STATE_DOWN, &priv->state) &&
1814 !test_bit(NIC_STATE_REMOVING, &priv->state) &&
1815 !test_and_set_bit(NIC_STATE_SERVICE_SCHED, &priv->state))
1816 (void)schedule_work(&priv->service_task);
1817}
1818
1819static void hns_nic_service_timer(unsigned long data)
1820{
1821 struct hns_nic_priv *priv = (struct hns_nic_priv *)data;
1822
1823 (void)mod_timer(&priv->service_timer, jiffies + SERVICE_TIMER_HZ);
1824
1825 hns_nic_task_schedule(priv);
1826}
1827
1828/**
1829 * hns_tx_timeout_reset - initiate reset due to Tx timeout
1830 * @priv: driver private struct
1831 **/
1832static void hns_tx_timeout_reset(struct hns_nic_priv *priv)
1833{
1834 /* Do the reset outside of interrupt context */
1835 if (!test_bit(NIC_STATE_DOWN, &priv->state)) {
1836 set_bit(NIC_STATE2_RESET_REQUESTED, &priv->state);
1837 netdev_warn(priv->netdev,
1838 "initiating reset due to tx timeout(%llu,0x%lx)\n",
1839 priv->tx_timeout_count, priv->state);
1840 priv->tx_timeout_count++;
1841 hns_nic_task_schedule(priv);
1842 }
1843}
1844
1845static int hns_nic_init_ring_data(struct hns_nic_priv *priv)
1846{
1847 struct hnae_handle *h = priv->ae_handle;
1848 struct hns_nic_ring_data *rd;
4b34aa41 1849 bool is_ver1 = AE_IS_VER1(priv->enet_ver);
b5996f11 1850 int i;
1851
1852 if (h->q_num > NIC_MAX_Q_PER_VF) {
1853 netdev_err(priv->netdev, "too much queue (%d)\n", h->q_num);
1854 return -EINVAL;
1855 }
1856
1857 priv->ring_data = kzalloc(h->q_num * sizeof(*priv->ring_data) * 2,
1858 GFP_KERNEL);
1859 if (!priv->ring_data)
1860 return -ENOMEM;
1861
1862 for (i = 0; i < h->q_num; i++) {
1863 rd = &priv->ring_data[i];
1864 rd->queue_index = i;
1865 rd->ring = &h->qs[i]->tx_ring;
1866 rd->poll_one = hns_nic_tx_poll_one;
cee5add4
DH		 1867 rd->fini_process = is_ver1 ? hns_nic_tx_fini_pro :
1868 hns_nic_tx_fini_pro_v2;
b5996f11 1869
1870 netif_napi_add(priv->netdev, &rd->napi,
1871 hns_nic_common_poll, NIC_TX_CLEAN_MAX_NUM);
1872 rd->ring->irq_init_flag = RCB_IRQ_NOT_INITED;
1873 }
1874 for (i = h->q_num; i < h->q_num * 2; i++) {
1875 rd = &priv->ring_data[i];
1876 rd->queue_index = i - h->q_num;
1877 rd->ring = &h->qs[i - h->q_num]->rx_ring;
1878 rd->poll_one = hns_nic_rx_poll_one;
1879 rd->ex_process = hns_nic_rx_up_pro;
cee5add4
DH		 1880 rd->fini_process = is_ver1 ? hns_nic_rx_fini_pro :
1881 hns_nic_rx_fini_pro_v2;
b5996f11 1882
1883 netif_napi_add(priv->netdev, &rd->napi,
1884 hns_nic_common_poll, NIC_RX_CLEAN_MAX_NUM);
1885 rd->ring->irq_init_flag = RCB_IRQ_NOT_INITED;
1886 }
1887
1888 return 0;
1889}
1890
1891static void hns_nic_uninit_ring_data(struct hns_nic_priv *priv)
1892{
1893 struct hnae_handle *h = priv->ae_handle;
1894 int i;
1895
1896 for (i = 0; i < h->q_num * 2; i++) {
1897 netif_napi_del(&priv->ring_data[i].napi);
1898 if (priv->ring_data[i].ring->irq_init_flag == RCB_IRQ_INITED) {
13ac695e
S		 1899 (void)irq_set_affinity_hint(
1900 priv->ring_data[i].ring->irq,
1901 NULL);
b5996f11 1902 free_irq(priv->ring_data[i].ring->irq,
1903 &priv->ring_data[i]);
1904 }
1905
1906 priv->ring_data[i].ring->irq_init_flag = RCB_IRQ_NOT_INITED;
1907 }
1908 kfree(priv->ring_data);
1909}
1910
13ac695e
S		 1911static void hns_nic_set_priv_ops(struct net_device *netdev)
1912{
1913 struct hns_nic_priv *priv = netdev_priv(netdev);
64353af6 1914 struct hnae_handle *h = priv->ae_handle;
13ac695e
S		 1915
1916 if (AE_IS_VER1(priv->enet_ver)) {
1917 priv->ops.fill_desc = fill_desc;
1918 priv->ops.get_rxd_bnum = get_rx_desc_bnum;
1919 priv->ops.maybe_stop_tx = hns_nic_maybe_stop_tx;
1920 } else {
1921 priv->ops.get_rxd_bnum = get_v2rx_desc_bnum;
64353af6
S		 1922 if ((netdev->features & NETIF_F_TSO) ||
1923 (netdev->features & NETIF_F_TSO6)) {
1924 priv->ops.fill_desc = fill_tso_desc;
1925 priv->ops.maybe_stop_tx = hns_nic_maybe_stop_tso;
1926 /* This chip only support 7*4096 */
1927 netif_set_gso_max_size(netdev, 7 * 4096);
64353af6
S		 1928 } else {
1929 priv->ops.fill_desc = fill_v2_desc;
1930 priv->ops.maybe_stop_tx = hns_nic_maybe_stop_tx;
1931 }
6fe27464
DH		 1932 /* enable tso when init
1933 * control tso on/off through TSE bit in bd
1934 */
1935 h->dev->ops->set_tso_stats(h, 1);
13ac695e
S		 1936 }
1937}
1938
b5996f11 1939static int hns_nic_try_get_ae(struct net_device *ndev)
1940{
1941 struct hns_nic_priv *priv = netdev_priv(ndev);
1942 struct hnae_handle *h;
1943 int ret;
1944
1945 h = hnae_get_handle(&priv->netdev->dev,
7b2acae6 1946 priv->fwnode, priv->port_id, NULL);
b5996f11 1947 if (IS_ERR_OR_NULL(h)) {
daa8cfd9 1948 ret = -ENODEV;
b5996f11 1949 dev_dbg(priv->dev, "has not handle, register notifier!\n");
1950 goto out;
1951 }
1952 priv->ae_handle = h;
1953
1954 ret = hns_nic_init_phy(ndev, h);
1955 if (ret) {
1956 dev_err(priv->dev, "probe phy device fail!\n");
1957 goto out_init_phy;
1958 }
1959
1960 ret = hns_nic_init_ring_data(priv);
1961 if (ret) {
1962 ret = -ENOMEM;
1963 goto out_init_ring_data;
1964 }
1965
13ac695e
S		 1966 hns_nic_set_priv_ops(ndev);
1967
b5996f11 1968 ret = register_netdev(ndev);
1969 if (ret) {
1970 dev_err(priv->dev, "probe register netdev fail!\n");
1971 goto out_reg_ndev_fail;
1972 }
1973 return 0;
1974
1975out_reg_ndev_fail:
1976 hns_nic_uninit_ring_data(priv);
1977 priv->ring_data = NULL;
1978out_init_phy:
1979out_init_ring_data:
1980 hnae_put_handle(priv->ae_handle);
1981 priv->ae_handle = NULL;
1982out:
1983 return ret;
1984}
1985
1986static int hns_nic_notifier_action(struct notifier_block *nb,
1987 unsigned long action, void *data)
1988{
1989 struct hns_nic_priv *priv =
1990 container_of(nb, struct hns_nic_priv, notifier_block);
1991
1992 assert(action == HNAE_AE_REGISTER);
1993
1994 if (!hns_nic_try_get_ae(priv->netdev)) {
1995 hnae_unregister_notifier(&priv->notifier_block);
1996 priv->notifier_block.notifier_call = NULL;
1997 }
1998 return 0;
1999}
2000
2001static int hns_nic_dev_probe(struct platform_device *pdev)
2002{
2003 struct device *dev = &pdev->dev;
2004 struct net_device *ndev;
2005 struct hns_nic_priv *priv;
406adee9 2006 u32 port_id;
b5996f11 2007 int ret;
2008
2009 ndev = alloc_etherdev_mq(sizeof(struct hns_nic_priv), NIC_MAX_Q_PER_VF);
2010 if (!ndev)
2011 return -ENOMEM;
2012
2013 platform_set_drvdata(pdev, ndev);
2014
2015 priv = netdev_priv(ndev);
2016 priv->dev = dev;
2017 priv->netdev = ndev;
2018
63434888
KY		 2019 if (dev_of_node(dev)) {
2020 struct device_node *ae_node;
b5996f11 2021
63434888
KY		 2022 if (of_device_is_compatible(dev->of_node,
2023 "hisilicon,hns-nic-v1"))
2024 priv->enet_ver = AE_VERSION_1;
2025 else
2026 priv->enet_ver = AE_VERSION_2;
2027
2028 ae_node = of_parse_phandle(dev->of_node, "ae-handle", 0);
2029 if (IS_ERR_OR_NULL(ae_node)) {
2030 ret = PTR_ERR(ae_node);
2031 dev_err(dev, "not find ae-handle\n");
2032 goto out_read_prop_fail;
2033 }
2034 priv->fwnode = &ae_node->fwnode;
2035 } else if (is_acpi_node(dev->fwnode)) {
2036 struct acpi_reference_args args;
2037
2038 if (acpi_dev_found(hns_enet_acpi_match[0].id))
2039 priv->enet_ver = AE_VERSION_1;
2040 else if (acpi_dev_found(hns_enet_acpi_match[1].id))
2041 priv->enet_ver = AE_VERSION_2;
2042 else
2043 return -ENXIO;
2044
2045 /* try to find port-idx-in-ae first */
2046 ret = acpi_node_get_property_reference(dev->fwnode,
2047 "ae-handle", 0, &args);
2048 if (ret) {
2049 dev_err(dev, "not find ae-handle\n");
2050 goto out_read_prop_fail;
2051 }
2052 priv->fwnode = acpi_fwnode_handle(args.adev);
2053 } else {
2054 dev_err(dev, "cannot read cfg data from OF or acpi\n");
2055 return -ENXIO;
48189d6a 2056 }
7b2acae6 2057
6162928c 2058 ret = device_property_read_u32(dev, "port-idx-in-ae", &port_id);
406adee9
YZZ		 2059 if (ret) {
2060 /* only for old code compatible */
6162928c 2061 ret = device_property_read_u32(dev, "port-id", &port_id);
406adee9
YZZ		 2062 if (ret)
2063 goto out_read_prop_fail;
2064 /* for old dts, we need to caculate the port offset */
2065 port_id = port_id < HNS_SRV_OFFSET ? port_id + HNS_DEBUG_OFFSET
2066 : port_id - HNS_SRV_OFFSET;
2067 }
2068 priv->port_id = port_id;
b5996f11 2069
2070 hns_init_mac_addr(ndev);
2071
2072 ndev->watchdog_timeo = HNS_NIC_TX_TIMEOUT;
2073 ndev->priv_flags |= IFF_UNICAST_FLT;
2074 ndev->netdev_ops = &hns_nic_netdev_ops;
2075 hns_ethtool_set_ops(ndev);
13ac695e 2076
b5996f11 2077 ndev->features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
2078 NETIF_F_RXCSUM | NETIF_F_SG | NETIF_F_GSO |
2079 NETIF_F_GRO;
2080 ndev->vlan_features |=
2081 NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM | NETIF_F_RXCSUM;
2082 ndev->vlan_features |= NETIF_F_SG | NETIF_F_GSO | NETIF_F_GRO;
2083
44770e11
JW		 2084 /* MTU range: 68 - 9578 (v1) or 9706 (v2) */
2085 ndev->min_mtu = MAC_MIN_MTU;
13ac695e
S		 2086 switch (priv->enet_ver) {
2087 case AE_VERSION_2:
64353af6 2088 ndev->features |= NETIF_F_TSO | NETIF_F_TSO6;
13ac695e
S		 2089 ndev->hw_features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
2090 NETIF_F_RXCSUM | NETIF_F_SG | NETIF_F_GSO |
64353af6 2091 NETIF_F_GRO | NETIF_F_TSO | NETIF_F_TSO6;
44770e11
JW		 2092 ndev->max_mtu = MAC_MAX_MTU_V2 -
2093 (ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN);
13ac695e
S		 2094 break;
2095 default:
44770e11
JW		 2096 ndev->max_mtu = MAC_MAX_MTU -
2097 (ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN);
13ac695e
S		 2098 break;
2099 }
2100
b5996f11 2101 SET_NETDEV_DEV(ndev, dev);
2102
2103 if (!dma_set_mask_and_coherent(dev, DMA_BIT_MASK(64)))
2104 dev_dbg(dev, "set mask to 64bit\n");
2105 else
39c94417 2106 dev_err(dev, "set mask to 64bit fail!\n");
b5996f11 2107
2108 /* carrier off reporting is important to ethtool even BEFORE open */
2109 netif_carrier_off(ndev);
2110
2111 setup_timer(&priv->service_timer, hns_nic_service_timer,
2112 (unsigned long)priv);
2113 INIT_WORK(&priv->service_task, hns_nic_service_task);
2114
2115 set_bit(NIC_STATE_SERVICE_INITED, &priv->state);
2116 clear_bit(NIC_STATE_SERVICE_SCHED, &priv->state);
2117 set_bit(NIC_STATE_DOWN, &priv->state);
2118
2119 if (hns_nic_try_get_ae(priv->netdev)) {
2120 priv->notifier_block.notifier_call = hns_nic_notifier_action;
2121 ret = hnae_register_notifier(&priv->notifier_block);
2122 if (ret) {
2123 dev_err(dev, "register notifier fail!\n");
2124 goto out_notify_fail;
2125 }
2126 dev_dbg(dev, "has not handle, register notifier!\n");
2127 }
2128
2129 return 0;
2130
2131out_notify_fail:
2132 (void)cancel_work_sync(&priv->service_task);
48189d6a 2133out_read_prop_fail:
b5996f11 2134 free_netdev(ndev);
2135 return ret;
2136}
2137
2138static int hns_nic_dev_remove(struct platform_device *pdev)
2139{
2140 struct net_device *ndev = platform_get_drvdata(pdev);
2141 struct hns_nic_priv *priv = netdev_priv(ndev);
2142
2143 if (ndev->reg_state != NETREG_UNINITIALIZED)
2144 unregister_netdev(ndev);
2145
2146 if (priv->ring_data)
2147 hns_nic_uninit_ring_data(priv);
2148 priv->ring_data = NULL;
2149
262b38cd
PR		 2150 if (ndev->phydev)
2151 phy_disconnect(ndev->phydev);
b5996f11 2152
2153 if (!IS_ERR_OR_NULL(priv->ae_handle))
2154 hnae_put_handle(priv->ae_handle);
2155 priv->ae_handle = NULL;
2156 if (priv->notifier_block.notifier_call)
2157 hnae_unregister_notifier(&priv->notifier_block);
2158 priv->notifier_block.notifier_call = NULL;
2159
2160 set_bit(NIC_STATE_REMOVING, &priv->state);
2161 (void)cancel_work_sync(&priv->service_task);
2162
2163 free_netdev(ndev);
2164 return 0;
2165}
2166
2167static const struct of_device_id hns_enet_of_match[] = {
2168 {.compatible = "hisilicon,hns-nic-v1",},
2169 {.compatible = "hisilicon,hns-nic-v2",},
2170 {},
2171};
2172
2173MODULE_DEVICE_TABLE(of, hns_enet_of_match);
2174
2175static struct platform_driver hns_nic_dev_driver = {
2176 .driver = {
2177 .name = "hns-nic",
b5996f11 2178 .of_match_table = hns_enet_of_match,
63434888 2179 .acpi_match_table = ACPI_PTR(hns_enet_acpi_match),
b5996f11 2180 },
2181 .probe = hns_nic_dev_probe,
2182 .remove = hns_nic_dev_remove,
2183};
2184
2185module_platform_driver(hns_nic_dev_driver);
2186
2187MODULE_DESCRIPTION("HISILICON HNS Ethernet driver");
2188MODULE_AUTHOR("Hisilicon, Inc.");
2189MODULE_LICENSE("GPL");
2190MODULE_ALIAS("platform:hns-nic");
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