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net: hns: Optimize hns_nic_common_poll for better performance
[mirror_ubuntu-zesty-kernel.git] / drivers / net / ethernet / hisilicon / hns / hns_enet.c
CommitLineData
b5996f11 1/*
2 * Copyright (c) 2014-2015 Hisilicon Limited.
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
8 */
9
10#include <linux/clk.h>
11#include <linux/cpumask.h>
12#include <linux/etherdevice.h>
13#include <linux/if_vlan.h>
14#include <linux/interrupt.h>
15#include <linux/io.h>
16#include <linux/ip.h>
17#include <linux/ipv6.h>
18#include <linux/module.h>
19#include <linux/phy.h>
20#include <linux/platform_device.h>
21#include <linux/skbuff.h>
22
23#include "hnae.h"
24#include "hns_enet.h"
44770e11 25#include "hns_dsaf_mac.h"
b5996f11 26
27#define NIC_MAX_Q_PER_VF 16
28#define HNS_NIC_TX_TIMEOUT (5 * HZ)
29
30#define SERVICE_TIMER_HZ (1 * HZ)
31
32#define NIC_TX_CLEAN_MAX_NUM 256
33#define NIC_RX_CLEAN_MAX_NUM 64
34
b5996f11 35#define RCB_IRQ_NOT_INITED 0
36#define RCB_IRQ_INITED 1
9cbe9fd5 37#define HNS_BUFFER_SIZE_2048 2048
b5996f11 38
13ac695e
S		 39#define BD_MAX_SEND_SIZE 8191
40#define SKB_TMP_LEN(SKB) \
41 (((SKB)->transport_header - (SKB)->mac_header) + tcp_hdrlen(SKB))
42
43static void fill_v2_desc(struct hnae_ring *ring, void *priv,
44 int size, dma_addr_t dma, int frag_end,
45 int buf_num, enum hns_desc_type type, int mtu)
46{
47 struct hnae_desc *desc = &ring->desc[ring->next_to_use];
48 struct hnae_desc_cb *desc_cb = &ring->desc_cb[ring->next_to_use];
49 struct iphdr *iphdr;
50 struct ipv6hdr *ipv6hdr;
51 struct sk_buff *skb;
13ac695e
S		 52 __be16 protocol;
53 u8 bn_pid = 0;
54 u8 rrcfv = 0;
55 u8 ip_offset = 0;
56 u8 tvsvsn = 0;
57 u16 mss = 0;
58 u8 l4_len = 0;
59 u16 paylen = 0;
60
61 desc_cb->priv = priv;
62 desc_cb->length = size;
63 desc_cb->dma = dma;
64 desc_cb->type = type;
65
66 desc->addr = cpu_to_le64(dma);
67 desc->tx.send_size = cpu_to_le16((u16)size);
68
f8a1a636 69 /* config bd buffer end */
13ac695e
S		 70 hnae_set_bit(rrcfv, HNSV2_TXD_VLD_B, 1);
71 hnae_set_field(bn_pid, HNSV2_TXD_BUFNUM_M, 0, buf_num - 1);
72
f8a1a636
SL		 73 /* fill port_id in the tx bd for sending management pkts */
74 hnae_set_field(bn_pid, HNSV2_TXD_PORTID_M,
75 HNSV2_TXD_PORTID_S, ring->q->handle->dport_id);
76
13ac695e
S		 77 if (type == DESC_TYPE_SKB) {
78 skb = (struct sk_buff *)priv;
79
80 if (skb->ip_summed == CHECKSUM_PARTIAL) {
81 skb_reset_mac_len(skb);
82 protocol = skb->protocol;
83 ip_offset = ETH_HLEN;
84
85 if (protocol == htons(ETH_P_8021Q)) {
86 ip_offset += VLAN_HLEN;
87 protocol = vlan_get_protocol(skb);
88 skb->protocol = protocol;
89 }
90
91 if (skb->protocol == htons(ETH_P_IP)) {
92 iphdr = ip_hdr(skb);
93 hnae_set_bit(rrcfv, HNSV2_TXD_L3CS_B, 1);
94 hnae_set_bit(rrcfv, HNSV2_TXD_L4CS_B, 1);
95
96 /* check for tcp/udp header */
0b51b1dc
DH		 97 if (iphdr->protocol == IPPROTO_TCP &&
98 skb_is_gso(skb)) {
13ac695e
S		 99 hnae_set_bit(tvsvsn,
100 HNSV2_TXD_TSE_B, 1);
13ac695e 101 l4_len = tcp_hdrlen(skb);
0b51b1dc
DH		 102 mss = skb_shinfo(skb)->gso_size;
103 paylen = skb->len - SKB_TMP_LEN(skb);
13ac695e
S		 104 }
105 } else if (skb->protocol == htons(ETH_P_IPV6)) {
106 hnae_set_bit(tvsvsn, HNSV2_TXD_IPV6_B, 1);
107 ipv6hdr = ipv6_hdr(skb);
108 hnae_set_bit(rrcfv, HNSV2_TXD_L4CS_B, 1);
109
110 /* check for tcp/udp header */
0b51b1dc
DH		 111 if (ipv6hdr->nexthdr == IPPROTO_TCP &&
112 skb_is_gso(skb) && skb_is_gso_v6(skb)) {
13ac695e
S		 113 hnae_set_bit(tvsvsn,
114 HNSV2_TXD_TSE_B, 1);
13ac695e 115 l4_len = tcp_hdrlen(skb);
0b51b1dc
DH		 116 mss = skb_shinfo(skb)->gso_size;
117 paylen = skb->len - SKB_TMP_LEN(skb);
13ac695e
S		 118 }
119 }
120 desc->tx.ip_offset = ip_offset;
121 desc->tx.tse_vlan_snap_v6_sctp_nth = tvsvsn;
122 desc->tx.mss = cpu_to_le16(mss);
123 desc->tx.l4_len = l4_len;
124 desc->tx.paylen = cpu_to_le16(paylen);
125 }
126 }
127
128 hnae_set_bit(rrcfv, HNSV2_TXD_FE_B, frag_end);
129
130 desc->tx.bn_pid = bn_pid;
131 desc->tx.ra_ri_cs_fe_vld = rrcfv;
132
133 ring_ptr_move_fw(ring, next_to_use);
134}
135
63434888
KY		 136static const struct acpi_device_id hns_enet_acpi_match[] = {
137 { "HISI00C1", 0 },
138 { "HISI00C2", 0 },
139 { },
140};
141MODULE_DEVICE_TABLE(acpi, hns_enet_acpi_match);
142
b5996f11 143static void fill_desc(struct hnae_ring *ring, void *priv,
144 int size, dma_addr_t dma, int frag_end,
13ac695e 145 int buf_num, enum hns_desc_type type, int mtu)
b5996f11 146{
147 struct hnae_desc *desc = &ring->desc[ring->next_to_use];
148 struct hnae_desc_cb *desc_cb = &ring->desc_cb[ring->next_to_use];
149 struct sk_buff *skb;
150 __be16 protocol;
151 u32 ip_offset;
152 u32 asid_bufnum_pid = 0;
153 u32 flag_ipoffset = 0;
154
155 desc_cb->priv = priv;
156 desc_cb->length = size;
157 desc_cb->dma = dma;
158 desc_cb->type = type;
159
160 desc->addr = cpu_to_le64(dma);
161 desc->tx.send_size = cpu_to_le16((u16)size);
162
163 /*config bd buffer end */
164 flag_ipoffset |= 1 << HNS_TXD_VLD_B;
165
166 asid_bufnum_pid |= buf_num << HNS_TXD_BUFNUM_S;
167
168 if (type == DESC_TYPE_SKB) {
169 skb = (struct sk_buff *)priv;
170
171 if (skb->ip_summed == CHECKSUM_PARTIAL) {
172 protocol = skb->protocol;
173 ip_offset = ETH_HLEN;
174
175 /*if it is a SW VLAN check the next protocol*/
176 if (protocol == htons(ETH_P_8021Q)) {
177 ip_offset += VLAN_HLEN;
178 protocol = vlan_get_protocol(skb);
179 skb->protocol = protocol;
180 }
181
182 if (skb->protocol == htons(ETH_P_IP)) {
183 flag_ipoffset |= 1 << HNS_TXD_L3CS_B;
184 /* check for tcp/udp header */
185 flag_ipoffset |= 1 << HNS_TXD_L4CS_B;
186
187 } else if (skb->protocol == htons(ETH_P_IPV6)) {
188 /* ipv6 has not l3 cs, check for L4 header */
189 flag_ipoffset |= 1 << HNS_TXD_L4CS_B;
190 }
191
192 flag_ipoffset |= ip_offset << HNS_TXD_IPOFFSET_S;
193 }
194 }
195
196 flag_ipoffset |= frag_end << HNS_TXD_FE_B;
197
198 desc->tx.asid_bufnum_pid = cpu_to_le16(asid_bufnum_pid);
199 desc->tx.flag_ipoffset = cpu_to_le32(flag_ipoffset);
200
201 ring_ptr_move_fw(ring, next_to_use);
202}
203
204static void unfill_desc(struct hnae_ring *ring)
205{
206 ring_ptr_move_bw(ring, next_to_use);
207}
208
13ac695e
S		 209static int hns_nic_maybe_stop_tx(
210 struct sk_buff **out_skb, int *bnum, struct hnae_ring *ring)
b5996f11 211{
13ac695e
S		 212 struct sk_buff *skb = *out_skb;
213 struct sk_buff *new_skb = NULL;
b5996f11 214 int buf_num;
b5996f11 215
216 /* no. of segments (plus a header) */
217 buf_num = skb_shinfo(skb)->nr_frags + 1;
218
219 if (unlikely(buf_num > ring->max_desc_num_per_pkt)) {
13ac695e
S		 220 if (ring_space(ring) < 1)
221 return -EBUSY;
b5996f11 222
223 new_skb = skb_copy(skb, GFP_ATOMIC);
13ac695e
S		 224 if (!new_skb)
225 return -ENOMEM;
b5996f11 226
227 dev_kfree_skb_any(skb);
13ac695e 228 *out_skb = new_skb;
b5996f11 229 buf_num = 1;
b5996f11 230 } else if (buf_num > ring_space(ring)) {
13ac695e
S		 231 return -EBUSY;
232 }
233
234 *bnum = buf_num;
235 return 0;
236}
237
64353af6
S		 238static int hns_nic_maybe_stop_tso(
239 struct sk_buff **out_skb, int *bnum, struct hnae_ring *ring)
240{
241 int i;
242 int size;
243 int buf_num;
244 int frag_num;
245 struct sk_buff *skb = *out_skb;
246 struct sk_buff *new_skb = NULL;
247 struct skb_frag_struct *frag;
248
249 size = skb_headlen(skb);
250 buf_num = (size + BD_MAX_SEND_SIZE - 1) / BD_MAX_SEND_SIZE;
251
252 frag_num = skb_shinfo(skb)->nr_frags;
253 for (i = 0; i < frag_num; i++) {
254 frag = &skb_shinfo(skb)->frags[i];
255 size = skb_frag_size(frag);
256 buf_num += (size + BD_MAX_SEND_SIZE - 1) / BD_MAX_SEND_SIZE;
257 }
258
259 if (unlikely(buf_num > ring->max_desc_num_per_pkt)) {
260 buf_num = (skb->len + BD_MAX_SEND_SIZE - 1) / BD_MAX_SEND_SIZE;
261 if (ring_space(ring) < buf_num)
262 return -EBUSY;
263 /* manual split the send packet */
264 new_skb = skb_copy(skb, GFP_ATOMIC);
265 if (!new_skb)
266 return -ENOMEM;
267 dev_kfree_skb_any(skb);
268 *out_skb = new_skb;
269
270 } else if (ring_space(ring) < buf_num) {
271 return -EBUSY;
272 }
273
274 *bnum = buf_num;
275 return 0;
276}
277
278static void fill_tso_desc(struct hnae_ring *ring, void *priv,
279 int size, dma_addr_t dma, int frag_end,
280 int buf_num, enum hns_desc_type type, int mtu)
281{
282 int frag_buf_num;
283 int sizeoflast;
284 int k;
285
286 frag_buf_num = (size + BD_MAX_SEND_SIZE - 1) / BD_MAX_SEND_SIZE;
287 sizeoflast = size % BD_MAX_SEND_SIZE;
288 sizeoflast = sizeoflast ? sizeoflast : BD_MAX_SEND_SIZE;
289
290 /* when the frag size is bigger than hardware, split this frag */
291 for (k = 0; k < frag_buf_num; k++)
292 fill_v2_desc(ring, priv,
293 (k == frag_buf_num - 1) ?
294 sizeoflast : BD_MAX_SEND_SIZE,
295 dma + BD_MAX_SEND_SIZE * k,
296 frag_end && (k == frag_buf_num - 1) ? 1 : 0,
297 buf_num,
298 (type == DESC_TYPE_SKB && !k) ?
299 DESC_TYPE_SKB : DESC_TYPE_PAGE,
300 mtu);
301}
302
13ac695e
S		 303int hns_nic_net_xmit_hw(struct net_device *ndev,
304 struct sk_buff *skb,
305 struct hns_nic_ring_data *ring_data)
306{
307 struct hns_nic_priv *priv = netdev_priv(ndev);
13ac695e 308 struct hnae_ring *ring = ring_data->ring;
b85ea006 309 struct device *dev = ring_to_dev(ring);
13ac695e
S		 310 struct netdev_queue *dev_queue;
311 struct skb_frag_struct *frag;
312 int buf_num;
313 int seg_num;
314 dma_addr_t dma;
315 int size, next_to_use;
316 int i;
317
318 switch (priv->ops.maybe_stop_tx(&skb, &buf_num, ring)) {
319 case -EBUSY:
b5996f11 320 ring->stats.tx_busy++;
321 goto out_net_tx_busy;
13ac695e
S		 322 case -ENOMEM:
323 ring->stats.sw_err_cnt++;
324 netdev_err(ndev, "no memory to xmit!\n");
325 goto out_err_tx_ok;
326 default:
327 break;
b5996f11 328 }
13ac695e
S		 329
330 /* no. of segments (plus a header) */
331 seg_num = skb_shinfo(skb)->nr_frags + 1;
b5996f11 332 next_to_use = ring->next_to_use;
333
334 /* fill the first part */
335 size = skb_headlen(skb);
336 dma = dma_map_single(dev, skb->data, size, DMA_TO_DEVICE);
337 if (dma_mapping_error(dev, dma)) {
338 netdev_err(ndev, "TX head DMA map failed\n");
339 ring->stats.sw_err_cnt++;
340 goto out_err_tx_ok;
341 }
13ac695e
S		 342 priv->ops.fill_desc(ring, skb, size, dma, seg_num == 1 ? 1 : 0,
343 buf_num, DESC_TYPE_SKB, ndev->mtu);
b5996f11 344
345 /* fill the fragments */
13ac695e 346 for (i = 1; i < seg_num; i++) {
b5996f11 347 frag = &skb_shinfo(skb)->frags[i - 1];
348 size = skb_frag_size(frag);
349 dma = skb_frag_dma_map(dev, frag, 0, size, DMA_TO_DEVICE);
350 if (dma_mapping_error(dev, dma)) {
351 netdev_err(ndev, "TX frag(%d) DMA map failed\n", i);
352 ring->stats.sw_err_cnt++;
353 goto out_map_frag_fail;
354 }
13ac695e
S		 355 priv->ops.fill_desc(ring, skb_frag_page(frag), size, dma,
356 seg_num - 1 == i ? 1 : 0, buf_num,
357 DESC_TYPE_PAGE, ndev->mtu);
b5996f11 358 }
359
360 /*complete translate all packets*/
361 dev_queue = netdev_get_tx_queue(ndev, skb->queue_mapping);
362 netdev_tx_sent_queue(dev_queue, skb->len);
363
364 wmb(); /* commit all data before submit */
365 assert(skb->queue_mapping < priv->ae_handle->q_num);
366 hnae_queue_xmit(priv->ae_handle->qs[skb->queue_mapping], buf_num);
367 ring->stats.tx_pkts++;
368 ring->stats.tx_bytes += skb->len;
369
370 return NETDEV_TX_OK;
371
372out_map_frag_fail:
373
13ac695e 374 while (ring->next_to_use != next_to_use) {
b5996f11 375 unfill_desc(ring);
13ac695e
S		 376 if (ring->next_to_use != next_to_use)
377 dma_unmap_page(dev,
378 ring->desc_cb[ring->next_to_use].dma,
379 ring->desc_cb[ring->next_to_use].length,
380 DMA_TO_DEVICE);
381 else
382 dma_unmap_single(dev,
383 ring->desc_cb[next_to_use].dma,
384 ring->desc_cb[next_to_use].length,
385 DMA_TO_DEVICE);
b5996f11 386 }
387
b5996f11 388out_err_tx_ok:
389
390 dev_kfree_skb_any(skb);
391 return NETDEV_TX_OK;
392
393out_net_tx_busy:
394
395 netif_stop_subqueue(ndev, skb->queue_mapping);
396
397 /* Herbert's original patch had:
398 * smp_mb__after_netif_stop_queue();
399 * but since that doesn't exist yet, just open code it.
400 */
401 smp_mb();
402 return NETDEV_TX_BUSY;
403}
404
405/**
406 * hns_nic_get_headlen - determine size of header for RSC/LRO/GRO/FCOE
407 * @data: pointer to the start of the headers
408 * @max: total length of section to find headers in
409 *
410 * This function is meant to determine the length of headers that will
411 * be recognized by hardware for LRO, GRO, and RSC offloads. The main
412 * motivation of doing this is to only perform one pull for IPv4 TCP
413 * packets so that we can do basic things like calculating the gso_size
414 * based on the average data per packet.
415 **/
416static unsigned int hns_nic_get_headlen(unsigned char *data, u32 flag,
417 unsigned int max_size)
418{
419 unsigned char *network;
420 u8 hlen;
421
422 /* this should never happen, but better safe than sorry */
423 if (max_size < ETH_HLEN)
424 return max_size;
425
426 /* initialize network frame pointer */
427 network = data;
428
429 /* set first protocol and move network header forward */
430 network += ETH_HLEN;
431
432 /* handle any vlan tag if present */
433 if (hnae_get_field(flag, HNS_RXD_VLAN_M, HNS_RXD_VLAN_S)
434 == HNS_RX_FLAG_VLAN_PRESENT) {
435 if ((typeof(max_size))(network - data) > (max_size - VLAN_HLEN))
436 return max_size;
437
438 network += VLAN_HLEN;
439 }
440
441 /* handle L3 protocols */
442 if (hnae_get_field(flag, HNS_RXD_L3ID_M, HNS_RXD_L3ID_S)
443 == HNS_RX_FLAG_L3ID_IPV4) {
444 if ((typeof(max_size))(network - data) >
445 (max_size - sizeof(struct iphdr)))
446 return max_size;
447
448 /* access ihl as a u8 to avoid unaligned access on ia64 */
449 hlen = (network[0] & 0x0F) << 2;
450
451 /* verify hlen meets minimum size requirements */
452 if (hlen < sizeof(struct iphdr))
453 return network - data;
454
455 /* record next protocol if header is present */
456 } else if (hnae_get_field(flag, HNS_RXD_L3ID_M, HNS_RXD_L3ID_S)
457 == HNS_RX_FLAG_L3ID_IPV6) {
458 if ((typeof(max_size))(network - data) >
459 (max_size - sizeof(struct ipv6hdr)))
460 return max_size;
461
462 /* record next protocol */
463 hlen = sizeof(struct ipv6hdr);
464 } else {
465 return network - data;
466 }
467
468 /* relocate pointer to start of L4 header */
469 network += hlen;
470
471 /* finally sort out TCP/UDP */
472 if (hnae_get_field(flag, HNS_RXD_L4ID_M, HNS_RXD_L4ID_S)
473 == HNS_RX_FLAG_L4ID_TCP) {
474 if ((typeof(max_size))(network - data) >
475 (max_size - sizeof(struct tcphdr)))
476 return max_size;
477
478 /* access doff as a u8 to avoid unaligned access on ia64 */
479 hlen = (network[12] & 0xF0) >> 2;
480
481 /* verify hlen meets minimum size requirements */
482 if (hlen < sizeof(struct tcphdr))
483 return network - data;
484
485 network += hlen;
486 } else if (hnae_get_field(flag, HNS_RXD_L4ID_M, HNS_RXD_L4ID_S)
487 == HNS_RX_FLAG_L4ID_UDP) {
488 if ((typeof(max_size))(network - data) >
489 (max_size - sizeof(struct udphdr)))
490 return max_size;
491
492 network += sizeof(struct udphdr);
493 }
494
495 /* If everything has gone correctly network should be the
496 * data section of the packet and will be the end of the header.
497 * If not then it probably represents the end of the last recognized
498 * header.
499 */
500 if ((typeof(max_size))(network - data) < max_size)
501 return network - data;
502 else
503 return max_size;
504}
505
9cbe9fd5 506static void hns_nic_reuse_page(struct sk_buff *skb, int i,
507 struct hnae_ring *ring, int pull_len,
508 struct hnae_desc_cb *desc_cb)
b5996f11 509{
9cbe9fd5 510 struct hnae_desc *desc;
511 int truesize, size;
512 int last_offset;
be78a690
AB		 513 bool twobufs;
514
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
bccd2711 863static bool hns_nic_rx_fini_pro(struct hns_nic_ring_data *ring_data)
b5996f11 864{
865 struct hnae_ring *ring = ring_data->ring;
866 int num = 0;
867
cee5add4
DH		 868 ring_data->ring->q->handle->dev->ops->toggle_ring_irq(ring, 0);
869
b5996f11 870 /* for hardware bug fixed */
871 num = readl_relaxed(ring->io_base + RCB_REG_FBDNUM);
872
873 if (num > 0) {
874 ring_data->ring->q->handle->dev->ops->toggle_ring_irq(
875 ring_data->ring, 1);
876
bccd2711 877 return false;
878 } else {
879 return true;
b5996f11 880 }
881}
882
bccd2711 883static bool hns_nic_rx_fini_pro_v2(struct hns_nic_ring_data *ring_data)
cee5add4
DH		 884{
885 struct hnae_ring *ring = ring_data->ring;
bccd2711 886 int num;
cee5add4
DH		 887
888 num = readl_relaxed(ring->io_base + RCB_REG_FBDNUM);
889
bccd2711 890 if (!num)
891 return true;
cee5add4 892 else
bccd2711 893 return false;
cee5add4
DH		 894}
895
b5996f11 896static inline void hns_nic_reclaim_one_desc(struct hnae_ring *ring,
897 int *bytes, int *pkts)
898{
899 struct hnae_desc_cb *desc_cb = &ring->desc_cb[ring->next_to_clean];
900
901 (*pkts) += (desc_cb->type == DESC_TYPE_SKB);
902 (*bytes) += desc_cb->length;
903 /* desc_cb will be cleaned, after hnae_free_buffer_detach*/
904 hnae_free_buffer_detach(ring, ring->next_to_clean);
905
906 ring_ptr_move_fw(ring, next_to_clean);
907}
908
909static int is_valid_clean_head(struct hnae_ring *ring, int h)
910{
911 int u = ring->next_to_use;
912 int c = ring->next_to_clean;
913
914 if (unlikely(h > ring->desc_num))
915 return 0;
916
917 assert(u > 0 && u < ring->desc_num);
918 assert(c > 0 && c < ring->desc_num);
919 assert(u != c && h != c); /* must be checked before call this func */
920
921 return u > c ? (h > c && h <= u) : (h > c || h <= u);
922}
923
924/* netif_tx_lock will turn down the performance, set only when necessary */
925#ifdef CONFIG_NET_POLL_CONTROLLER
926#define NETIF_TX_LOCK(ndev) netif_tx_lock(ndev)
927#define NETIF_TX_UNLOCK(ndev) netif_tx_unlock(ndev)
928#else
929#define NETIF_TX_LOCK(ndev)
930#define NETIF_TX_UNLOCK(ndev)
931#endif
932/* reclaim all desc in one budget
933 * return error or number of desc left
934 */
935static int hns_nic_tx_poll_one(struct hns_nic_ring_data *ring_data,
936 int budget, void *v)
937{
938 struct hnae_ring *ring = ring_data->ring;
939 struct net_device *ndev = ring_data->napi.dev;
940 struct netdev_queue *dev_queue;
941 struct hns_nic_priv *priv = netdev_priv(ndev);
942 int head;
943 int bytes, pkts;
944
945 NETIF_TX_LOCK(ndev);
946
947 head = readl_relaxed(ring->io_base + RCB_REG_HEAD);
948 rmb(); /* make sure head is ready before touch any data */
949
950 if (is_ring_empty(ring) || head == ring->next_to_clean) {
951 NETIF_TX_UNLOCK(ndev);
952 return 0; /* no data to poll */
953 }
954
955 if (!is_valid_clean_head(ring, head)) {
956 netdev_err(ndev, "wrong head (%d, %d-%d)\n", head,
957 ring->next_to_use, ring->next_to_clean);
958 ring->stats.io_err_cnt++;
959 NETIF_TX_UNLOCK(ndev);
960 return -EIO;
961 }
962
963 bytes = 0;
964 pkts = 0;
9cbe9fd5 965 while (head != ring->next_to_clean) {
b5996f11 966 hns_nic_reclaim_one_desc(ring, &bytes, &pkts);
9cbe9fd5 967 /* issue prefetch for next Tx descriptor */
968 prefetch(&ring->desc_cb[ring->next_to_clean]);
969 }
b5996f11 970
971 NETIF_TX_UNLOCK(ndev);
972
973 dev_queue = netdev_get_tx_queue(ndev, ring_data->queue_index);
974 netdev_tx_completed_queue(dev_queue, pkts, bytes);
975
13ac695e
S		 976 if (unlikely(priv->link && !netif_carrier_ok(ndev)))
977 netif_carrier_on(ndev);
978
b5996f11 979 if (unlikely(pkts && netif_carrier_ok(ndev) &&
980 (ring_space(ring) >= ring->max_desc_num_per_pkt * 2))) {
981 /* Make sure that anybody stopping the queue after this
982 * sees the new next_to_clean.
983 */
984 smp_mb();
985 if (netif_tx_queue_stopped(dev_queue) &&
986 !test_bit(NIC_STATE_DOWN, &priv->state)) {
987 netif_tx_wake_queue(dev_queue);
988 ring->stats.restart_queue++;
989 }
990 }
991 return 0;
992}
993
bccd2711 994static bool hns_nic_tx_fini_pro(struct hns_nic_ring_data *ring_data)
b5996f11 995{
996 struct hnae_ring *ring = ring_data->ring;
cee5add4
DH		 997 int head;
998
999 ring_data->ring->q->handle->dev->ops->toggle_ring_irq(ring, 0);
1000
1001 head = readl_relaxed(ring->io_base + RCB_REG_HEAD);
b5996f11 1002
1003 if (head != ring->next_to_clean) {
1004 ring_data->ring->q->handle->dev->ops->toggle_ring_irq(
1005 ring_data->ring, 1);
1006
bccd2711 1007 return false;
1008 } else {
1009 return true;
b5996f11 1010 }
1011}
1012
bccd2711 1013static bool hns_nic_tx_fini_pro_v2(struct hns_nic_ring_data *ring_data)
cee5add4
DH		 1014{
1015 struct hnae_ring *ring = ring_data->ring;
1016 int head = readl_relaxed(ring->io_base + RCB_REG_HEAD);
1017
1018 if (head == ring->next_to_clean)
bccd2711 1019 return true;
cee5add4 1020 else
bccd2711 1021 return false;
cee5add4
DH		 1022}
1023
b5996f11 1024static void hns_nic_tx_clr_all_bufs(struct hns_nic_ring_data *ring_data)
1025{
1026 struct hnae_ring *ring = ring_data->ring;
1027 struct net_device *ndev = ring_data->napi.dev;
1028 struct netdev_queue *dev_queue;
1029 int head;
1030 int bytes, pkts;
1031
1032 NETIF_TX_LOCK(ndev);
1033
1034 head = ring->next_to_use; /* ntu :soft setted ring position*/
1035 bytes = 0;
1036 pkts = 0;
1037 while (head != ring->next_to_clean)
1038 hns_nic_reclaim_one_desc(ring, &bytes, &pkts);
1039
1040 NETIF_TX_UNLOCK(ndev);
1041
1042 dev_queue = netdev_get_tx_queue(ndev, ring_data->queue_index);
1043 netdev_tx_reset_queue(dev_queue);
1044}
1045
1046static int hns_nic_common_poll(struct napi_struct *napi, int budget)
1047{
bccd2711 1048 int clean_complete = 0;
b5996f11 1049 struct hns_nic_ring_data *ring_data =
1050 container_of(napi, struct hns_nic_ring_data, napi);
bccd2711 1051 struct hnae_ring *ring = ring_data->ring;
b5996f11 1052
bccd2711 1053try_again:
1054 clean_complete += ring_data->poll_one(
1055 ring_data, budget - clean_complete,
1056 ring_data->ex_process);
1057
1058 if (clean_complete < budget) {
1059 if (ring_data->fini_process(ring_data)) {
1060 napi_complete(napi);
1061 ring->q->handle->dev->ops->toggle_ring_irq(ring, 0);
1062 } else {
1063 goto try_again;
1064 }
b5996f11 1065 }
1066
1067 return clean_complete;
1068}
1069
1070static irqreturn_t hns_irq_handle(int irq, void *dev)
1071{
1072 struct hns_nic_ring_data *ring_data = (struct hns_nic_ring_data *)dev;
1073
1074 ring_data->ring->q->handle->dev->ops->toggle_ring_irq(
1075 ring_data->ring, 1);
1076 napi_schedule(&ring_data->napi);
1077
1078 return IRQ_HANDLED;
1079}
1080
1081/**
1082 *hns_nic_adjust_link - adjust net work mode by the phy stat or new param
1083 *@ndev: net device
1084 */
1085static void hns_nic_adjust_link(struct net_device *ndev)
1086{
1087 struct hns_nic_priv *priv = netdev_priv(ndev);
1088 struct hnae_handle *h = priv->ae_handle;
bb7189dc
QX		 1089 int state = 1;
1090
262b38cd 1091 if (ndev->phydev) {
bb7189dc
QX		 1092 h->dev->ops->adjust_link(h, ndev->phydev->speed,
1093 ndev->phydev->duplex);
262b38cd 1094 state = ndev->phydev->link;
bb7189dc
QX		 1095 }
1096 state = state && h->dev->ops->get_status(h);
b5996f11 1097
bb7189dc
QX		 1098 if (state != priv->link) {
1099 if (state) {
1100 netif_carrier_on(ndev);
1101 netif_tx_wake_all_queues(ndev);
1102 netdev_info(ndev, "link up\n");
1103 } else {
1104 netif_carrier_off(ndev);
1105 netdev_info(ndev, "link down\n");
1106 }
1107 priv->link = state;
1108 }
b5996f11 1109}
1110
1111/**
1112 *hns_nic_init_phy - init phy
1113 *@ndev: net device
1114 *@h: ae handle
1115 * Return 0 on success, negative on failure
1116 */
1117int hns_nic_init_phy(struct net_device *ndev, struct hnae_handle *h)
1118{
652d39b0
KY		 1119 struct phy_device *phy_dev = h->phy_dev;
1120 int ret;
b5996f11 1121
652d39b0 1122 if (!h->phy_dev)
b5996f11 1123 return 0;
1124
652d39b0
KY		 1125 if (h->phy_if != PHY_INTERFACE_MODE_XGMII) {
1126 phy_dev->dev_flags = 0;
b5996f11 1127
652d39b0
KY		 1128 ret = phy_connect_direct(ndev, phy_dev, hns_nic_adjust_link,
1129 h->phy_if);
1130 } else {
1131 ret = phy_attach_direct(ndev, phy_dev, 0, h->phy_if);
1132 }
1133 if (unlikely(ret))
1134 return -ENODEV;
b5996f11 1135
1136 phy_dev->supported &= h->if_support;
1137 phy_dev->advertising = phy_dev->supported;
1138
1139 if (h->phy_if == PHY_INTERFACE_MODE_XGMII)
1140 phy_dev->autoneg = false;
1141
b5996f11 1142 return 0;
1143}
1144
1145static int hns_nic_ring_open(struct net_device *netdev, int idx)
1146{
1147 struct hns_nic_priv *priv = netdev_priv(netdev);
1148 struct hnae_handle *h = priv->ae_handle;
1149
1150 napi_enable(&priv->ring_data[idx].napi);
1151
1152 enable_irq(priv->ring_data[idx].ring->irq);
1153 h->dev->ops->toggle_ring_irq(priv->ring_data[idx].ring, 0);
1154
1155 return 0;
1156}
1157
1158static int hns_nic_net_set_mac_address(struct net_device *ndev, void *p)
1159{
1160 struct hns_nic_priv *priv = netdev_priv(ndev);
1161 struct hnae_handle *h = priv->ae_handle;
1162 struct sockaddr *mac_addr = p;
1163 int ret;
1164
1165 if (!mac_addr || !is_valid_ether_addr((const u8 *)mac_addr->sa_data))
1166 return -EADDRNOTAVAIL;
1167
1168 ret = h->dev->ops->set_mac_addr(h, mac_addr->sa_data);
1169 if (ret) {
1170 netdev_err(ndev, "set_mac_address fail, ret=%d!\n", ret);
1171 return ret;
1172 }
1173
1174 memcpy(ndev->dev_addr, mac_addr->sa_data, ndev->addr_len);
1175
1176 return 0;
1177}
1178
1179void hns_nic_update_stats(struct net_device *netdev)
1180{
1181 struct hns_nic_priv *priv = netdev_priv(netdev);
1182 struct hnae_handle *h = priv->ae_handle;
1183
1184 h->dev->ops->update_stats(h, &netdev->stats);
1185}
1186
1187/* set mac addr if it is configed. or leave it to the AE driver */
1188static void hns_init_mac_addr(struct net_device *ndev)
1189{
1190 struct hns_nic_priv *priv = netdev_priv(ndev);
b5996f11 1191
6162928c 1192 if (!device_get_mac_address(priv->dev, ndev->dev_addr, ETH_ALEN)) {
b5996f11 1193 eth_hw_addr_random(ndev);
1194 dev_warn(priv->dev, "No valid mac, use random mac %pM",
1195 ndev->dev_addr);
1196 }
1197}
1198
1199static void hns_nic_ring_close(struct net_device *netdev, int idx)
1200{
1201 struct hns_nic_priv *priv = netdev_priv(netdev);
1202 struct hnae_handle *h = priv->ae_handle;
1203
1204 h->dev->ops->toggle_ring_irq(priv->ring_data[idx].ring, 1);
1205 disable_irq(priv->ring_data[idx].ring->irq);
1206
1207 napi_disable(&priv->ring_data[idx].napi);
1208}
1209
df7adf84 1210static int hns_nic_init_affinity_mask(int q_num, int ring_idx,
1211 struct hnae_ring *ring, cpumask_t *mask)
b5996f11 1212{
b5996f11 1213 int cpu;
727f9c1a 1214
df7adf84 1215 /* Diffrent irq banlance between 16core and 32core.
1216 * The cpu mask set by ring index according to the ring flag
1217 * which indicate the ring is tx or rx.
1218 */
1219 if (q_num == num_possible_cpus()) {
1220 if (is_tx_ring(ring))
1221 cpu = ring_idx;
1222 else
1223 cpu = ring_idx - q_num;
13ac695e 1224 } else {
df7adf84 1225 if (is_tx_ring(ring))
1226 cpu = ring_idx * 2;
1227 else
1228 cpu = (ring_idx - q_num) * 2 + 1;
13ac695e 1229 }
727f9c1a 1230
df7adf84 1231 cpumask_clear(mask);
1232 cpumask_set_cpu(cpu, mask);
1233
1234 return cpu;
13ac695e
S		 1235}
1236
1237static int hns_nic_init_irq(struct hns_nic_priv *priv)
1238{
1239 struct hnae_handle *h = priv->ae_handle;
1240 struct hns_nic_ring_data *rd;
1241 int i;
1242 int ret;
df7adf84 1243 int cpu;
13ac695e 1244
b5996f11 1245 for (i = 0; i < h->q_num * 2; i++) {
1246 rd = &priv->ring_data[i];
1247
1248 if (rd->ring->irq_init_flag == RCB_IRQ_INITED)
1249 break;
1250
1251 snprintf(rd->ring->ring_name, RCB_RING_NAME_LEN,
1252 "%s-%s%d", priv->netdev->name,
df7adf84 1253 (is_tx_ring(rd->ring) ? "tx" : "rx"), rd->queue_index);
b5996f11 1254
1255 rd->ring->ring_name[RCB_RING_NAME_LEN - 1] = '\0';
1256
1257 ret = request_irq(rd->ring->irq,
1258 hns_irq_handle, 0, rd->ring->ring_name, rd);
1259 if (ret) {
1260 netdev_err(priv->netdev, "request irq(%d) fail\n",
1261 rd->ring->irq);
1262 return ret;
1263 }
1264 disable_irq(rd->ring->irq);
df7adf84 1265
1266 cpu = hns_nic_init_affinity_mask(h->q_num, i,
1267 rd->ring, &rd->mask);
1268
1269 if (cpu_online(cpu))
1270 irq_set_affinity_hint(rd->ring->irq,
1271 &rd->mask);
1272
b5996f11 1273 rd->ring->irq_init_flag = RCB_IRQ_INITED;
b5996f11 1274 }
1275
1276 return 0;
1277}
1278
1279static int hns_nic_net_up(struct net_device *ndev)
1280{
1281 struct hns_nic_priv *priv = netdev_priv(ndev);
1282 struct hnae_handle *h = priv->ae_handle;
454784d8 1283 int i, j;
b5996f11 1284 int ret;
1285
1286 ret = hns_nic_init_irq(priv);
1287 if (ret != 0) {
1288 netdev_err(ndev, "hns init irq failed! ret=%d\n", ret);
1289 return ret;
1290 }
1291
1292 for (i = 0; i < h->q_num * 2; i++) {
1293 ret = hns_nic_ring_open(ndev, i);
1294 if (ret)
1295 goto out_has_some_queues;
1296 }
1297
b5996f11 1298 ret = h->dev->ops->set_mac_addr(h, ndev->dev_addr);
1299 if (ret)
1300 goto out_set_mac_addr_err;
1301
1302 ret = h->dev->ops->start ? h->dev->ops->start(h) : 0;
1303 if (ret)
1304 goto out_start_err;
1305
262b38cd
PR		 1306 if (ndev->phydev)
1307 phy_start(ndev->phydev);
b5996f11 1308
1309 clear_bit(NIC_STATE_DOWN, &priv->state);
1310 (void)mod_timer(&priv->service_timer, jiffies + SERVICE_TIMER_HZ);
1311
1312 return 0;
1313
1314out_start_err:
1315 netif_stop_queue(ndev);
1316out_set_mac_addr_err:
b5996f11 1317out_has_some_queues:
1318 for (j = i - 1; j >= 0; j--)
1319 hns_nic_ring_close(ndev, j);
1320
1321 set_bit(NIC_STATE_DOWN, &priv->state);
1322
1323 return ret;
1324}
1325
1326static void hns_nic_net_down(struct net_device *ndev)
1327{
1328 int i;
1329 struct hnae_ae_ops *ops;
1330 struct hns_nic_priv *priv = netdev_priv(ndev);
1331
1332 if (test_and_set_bit(NIC_STATE_DOWN, &priv->state))
1333 return;
1334
1335 (void)del_timer_sync(&priv->service_timer);
1336 netif_tx_stop_all_queues(ndev);
1337 netif_carrier_off(ndev);
1338 netif_tx_disable(ndev);
1339 priv->link = 0;
1340
262b38cd
PR		 1341 if (ndev->phydev)
1342 phy_stop(ndev->phydev);
b5996f11 1343
1344 ops = priv->ae_handle->dev->ops;
1345
1346 if (ops->stop)
1347 ops->stop(priv->ae_handle);
1348
1349 netif_tx_stop_all_queues(ndev);
1350
1351 for (i = priv->ae_handle->q_num - 1; i >= 0; i--) {
1352 hns_nic_ring_close(ndev, i);
1353 hns_nic_ring_close(ndev, i + priv->ae_handle->q_num);
1354
1355 /* clean tx buffers*/
1356 hns_nic_tx_clr_all_bufs(priv->ring_data + i);
1357 }
1358}
1359
1360void hns_nic_net_reset(struct net_device *ndev)
1361{
1362 struct hns_nic_priv *priv = netdev_priv(ndev);
1363 struct hnae_handle *handle = priv->ae_handle;
1364
1365 while (test_and_set_bit(NIC_STATE_RESETTING, &priv->state))
1366 usleep_range(1000, 2000);
1367
1368 (void)hnae_reinit_handle(handle);
1369
1370 clear_bit(NIC_STATE_RESETTING, &priv->state);
1371}
1372
1373void hns_nic_net_reinit(struct net_device *netdev)
1374{
1375 struct hns_nic_priv *priv = netdev_priv(netdev);
1376
860e9538 1377 netif_trans_update(priv->netdev);
b5996f11 1378 while (test_and_set_bit(NIC_STATE_REINITING, &priv->state))
1379 usleep_range(1000, 2000);
1380
1381 hns_nic_net_down(netdev);
1382 hns_nic_net_reset(netdev);
1383 (void)hns_nic_net_up(netdev);
1384 clear_bit(NIC_STATE_REINITING, &priv->state);
1385}
1386
1387static int hns_nic_net_open(struct net_device *ndev)
1388{
1389 struct hns_nic_priv *priv = netdev_priv(ndev);
1390 struct hnae_handle *h = priv->ae_handle;
1391 int ret;
1392
1393 if (test_bit(NIC_STATE_TESTING, &priv->state))
1394 return -EBUSY;
1395
1396 priv->link = 0;
1397 netif_carrier_off(ndev);
1398
1399 ret = netif_set_real_num_tx_queues(ndev, h->q_num);
1400 if (ret < 0) {
1401 netdev_err(ndev, "netif_set_real_num_tx_queues fail, ret=%d!\n",
1402 ret);
1403 return ret;
1404 }
1405
1406 ret = netif_set_real_num_rx_queues(ndev, h->q_num);
1407 if (ret < 0) {
1408 netdev_err(ndev,
1409 "netif_set_real_num_rx_queues fail, ret=%d!\n", ret);
1410 return ret;
1411 }
1412
1413 ret = hns_nic_net_up(ndev);
1414 if (ret) {
1415 netdev_err(ndev,
1416 "hns net up fail, ret=%d!\n", ret);
1417 return ret;
1418 }
1419
1420 return 0;
1421}
1422
1423static int hns_nic_net_stop(struct net_device *ndev)
1424{
1425 hns_nic_net_down(ndev);
1426
1427 return 0;
1428}
1429
1430static void hns_tx_timeout_reset(struct hns_nic_priv *priv);
1431static void hns_nic_net_timeout(struct net_device *ndev)
1432{
1433 struct hns_nic_priv *priv = netdev_priv(ndev);
1434
1435 hns_tx_timeout_reset(priv);
1436}
1437
1438static int hns_nic_do_ioctl(struct net_device *netdev, struct ifreq *ifr,
1439 int cmd)
1440{
262b38cd 1441 struct phy_device *phy_dev = netdev->phydev;
b5996f11 1442
1443 if (!netif_running(netdev))
1444 return -EINVAL;
1445
1446 if (!phy_dev)
1447 return -ENOTSUPP;
1448
1449 return phy_mii_ioctl(phy_dev, ifr, cmd);
1450}
1451
1452/* use only for netconsole to poll with the device without interrupt */
1453#ifdef CONFIG_NET_POLL_CONTROLLER
1454void hns_nic_poll_controller(struct net_device *ndev)
1455{
1456 struct hns_nic_priv *priv = netdev_priv(ndev);
1457 unsigned long flags;
1458 int i;
1459
1460 local_irq_save(flags);
1461 for (i = 0; i < priv->ae_handle->q_num * 2; i++)
1462 napi_schedule(&priv->ring_data[i].napi);
1463 local_irq_restore(flags);
1464}
1465#endif
1466
1467static netdev_tx_t hns_nic_net_xmit(struct sk_buff *skb,
1468 struct net_device *ndev)
1469{
1470 struct hns_nic_priv *priv = netdev_priv(ndev);
1471 int ret;
1472
1473 assert(skb->queue_mapping < ndev->ae_handle->q_num);
1474 ret = hns_nic_net_xmit_hw(ndev, skb,
1475 &tx_ring_data(priv, skb->queue_mapping));
1476 if (ret == NETDEV_TX_OK) {
860e9538 1477 netif_trans_update(ndev);
b5996f11 1478 ndev->stats.tx_bytes += skb->len;
1479 ndev->stats.tx_packets++;
1480 }
1481 return (netdev_tx_t)ret;
1482}
1483
1484static int hns_nic_change_mtu(struct net_device *ndev, int new_mtu)
1485{
1486 struct hns_nic_priv *priv = netdev_priv(ndev);
1487 struct hnae_handle *h = priv->ae_handle;
1488 int ret;
1489
b5996f11 1490 if (!h->dev->ops->set_mtu)
1491 return -ENOTSUPP;
1492
1493 if (netif_running(ndev)) {
1494 (void)hns_nic_net_stop(ndev);
1495 msleep(100);
1496
1497 ret = h->dev->ops->set_mtu(h, new_mtu);
1498 if (ret)
1499 netdev_err(ndev, "set mtu fail, return value %d\n",
1500 ret);
1501
1502 if (hns_nic_net_open(ndev))
1503 netdev_err(ndev, "hns net open fail\n");
1504 } else {
1505 ret = h->dev->ops->set_mtu(h, new_mtu);
1506 }
1507
1508 if (!ret)
1509 ndev->mtu = new_mtu;
1510
1511 return ret;
1512}
1513
38f616da
S		 1514static int hns_nic_set_features(struct net_device *netdev,
1515 netdev_features_t features)
1516{
1517 struct hns_nic_priv *priv = netdev_priv(netdev);
38f616da
S		 1518
1519 switch (priv->enet_ver) {
1520 case AE_VERSION_1:
1521 if (features & (NETIF_F_TSO | NETIF_F_TSO6))
1522 netdev_info(netdev, "enet v1 do not support tso!\n");
1523 break;
1524 default:
1525 if (features & (NETIF_F_TSO | NETIF_F_TSO6)) {
1526 priv->ops.fill_desc = fill_tso_desc;
1527 priv->ops.maybe_stop_tx = hns_nic_maybe_stop_tso;
1528 /* The chip only support 7*4096 */
1529 netif_set_gso_max_size(netdev, 7 * 4096);
38f616da
S		 1530 } else {
1531 priv->ops.fill_desc = fill_v2_desc;
1532 priv->ops.maybe_stop_tx = hns_nic_maybe_stop_tx;
38f616da
S		 1533 }
1534 break;
1535 }
1536 netdev->features = features;
1537 return 0;
1538}
1539
1540static netdev_features_t hns_nic_fix_features(
1541 struct net_device *netdev, netdev_features_t features)
1542{
1543 struct hns_nic_priv *priv = netdev_priv(netdev);
1544
1545 switch (priv->enet_ver) {
1546 case AE_VERSION_1:
1547 features &= ~(NETIF_F_TSO | NETIF_F_TSO6 |
1548 NETIF_F_HW_VLAN_CTAG_FILTER);
1549 break;
1550 default:
1551 break;
1552 }
1553 return features;
1554}
1555
66355f52
KY		 1556static int hns_nic_uc_sync(struct net_device *netdev, const unsigned char *addr)
1557{
1558 struct hns_nic_priv *priv = netdev_priv(netdev);
1559 struct hnae_handle *h = priv->ae_handle;
1560
1561 if (h->dev->ops->add_uc_addr)
1562 return h->dev->ops->add_uc_addr(h, addr);
1563
1564 return 0;
1565}
1566
1567static int hns_nic_uc_unsync(struct net_device *netdev,
1568 const unsigned char *addr)
1569{
1570 struct hns_nic_priv *priv = netdev_priv(netdev);
1571 struct hnae_handle *h = priv->ae_handle;
1572
1573 if (h->dev->ops->rm_uc_addr)
1574 return h->dev->ops->rm_uc_addr(h, addr);
1575
1576 return 0;
1577}
1578
b5996f11 1579/**
1580 * nic_set_multicast_list - set mutl mac address
1581 * @netdev: net device
1582 * @p: mac address
1583 *
1584 * return void
1585 */
1586void hns_set_multicast_list(struct net_device *ndev)
1587{
1588 struct hns_nic_priv *priv = netdev_priv(ndev);
1589 struct hnae_handle *h = priv->ae_handle;
1590 struct netdev_hw_addr *ha = NULL;
1591
1592 if (!h) {
1593 netdev_err(ndev, "hnae handle is null\n");
1594 return;
1595 }
1596
ec2cafe6
KY		 1597 if (h->dev->ops->clr_mc_addr)
1598 if (h->dev->ops->clr_mc_addr(h))
1599 netdev_err(ndev, "clear multicast address fail\n");
1600
b5996f11 1601 if (h->dev->ops->set_mc_addr) {
1602 netdev_for_each_mc_addr(ha, ndev)
1603 if (h->dev->ops->set_mc_addr(h, ha->addr))
1604 netdev_err(ndev, "set multicast fail\n");
1605 }
1606}
1607
4568637f 1608void hns_nic_set_rx_mode(struct net_device *ndev)
1609{
1610 struct hns_nic_priv *priv = netdev_priv(ndev);
1611 struct hnae_handle *h = priv->ae_handle;
1612
1613 if (h->dev->ops->set_promisc_mode) {
1614 if (ndev->flags & IFF_PROMISC)
1615 h->dev->ops->set_promisc_mode(h, 1);
1616 else
1617 h->dev->ops->set_promisc_mode(h, 0);
1618 }
1619
1620 hns_set_multicast_list(ndev);
66355f52
KY		 1621
1622 if (__dev_uc_sync(ndev, hns_nic_uc_sync, hns_nic_uc_unsync))
1623 netdev_err(ndev, "sync uc address fail\n");
4568637f 1624}
1625
b5996f11 1626struct rtnl_link_stats64 *hns_nic_get_stats64(struct net_device *ndev,
1627 struct rtnl_link_stats64 *stats)
1628{
1629 int idx = 0;
1630 u64 tx_bytes = 0;
1631 u64 rx_bytes = 0;
1632 u64 tx_pkts = 0;
1633 u64 rx_pkts = 0;
1634 struct hns_nic_priv *priv = netdev_priv(ndev);
1635 struct hnae_handle *h = priv->ae_handle;
1636
1637 for (idx = 0; idx < h->q_num; idx++) {
1638 tx_bytes += h->qs[idx]->tx_ring.stats.tx_bytes;
1639 tx_pkts += h->qs[idx]->tx_ring.stats.tx_pkts;
1640 rx_bytes += h->qs[idx]->rx_ring.stats.rx_bytes;
1641 rx_pkts += h->qs[idx]->rx_ring.stats.rx_pkts;
1642 }
1643
1644 stats->tx_bytes = tx_bytes;
1645 stats->tx_packets = tx_pkts;
1646 stats->rx_bytes = rx_bytes;
1647 stats->rx_packets = rx_pkts;
1648
1649 stats->rx_errors = ndev->stats.rx_errors;
1650 stats->multicast = ndev->stats.multicast;
1651 stats->rx_length_errors = ndev->stats.rx_length_errors;
1652 stats->rx_crc_errors = ndev->stats.rx_crc_errors;
1653 stats->rx_missed_errors = ndev->stats.rx_missed_errors;
1654
1655 stats->tx_errors = ndev->stats.tx_errors;
1656 stats->rx_dropped = ndev->stats.rx_dropped;
1657 stats->tx_dropped = ndev->stats.tx_dropped;
1658 stats->collisions = ndev->stats.collisions;
1659 stats->rx_over_errors = ndev->stats.rx_over_errors;
1660 stats->rx_frame_errors = ndev->stats.rx_frame_errors;
1661 stats->rx_fifo_errors = ndev->stats.rx_fifo_errors;
1662 stats->tx_aborted_errors = ndev->stats.tx_aborted_errors;
1663 stats->tx_carrier_errors = ndev->stats.tx_carrier_errors;
1664 stats->tx_fifo_errors = ndev->stats.tx_fifo_errors;
1665 stats->tx_heartbeat_errors = ndev->stats.tx_heartbeat_errors;
1666 stats->tx_window_errors = ndev->stats.tx_window_errors;
1667 stats->rx_compressed = ndev->stats.rx_compressed;
1668 stats->tx_compressed = ndev->stats.tx_compressed;
1669
1670 return stats;
1671}
1672
2162a4a1
DH		 1673static u16
1674hns_nic_select_queue(struct net_device *ndev, struct sk_buff *skb,
1675 void *accel_priv, select_queue_fallback_t fallback)
1676{
1677 struct ethhdr *eth_hdr = (struct ethhdr *)skb->data;
1678 struct hns_nic_priv *priv = netdev_priv(ndev);
1679
1680 /* fix hardware broadcast/multicast packets queue loopback */
1681 if (!AE_IS_VER1(priv->enet_ver) &&
1682 is_multicast_ether_addr(eth_hdr->h_dest))
1683 return 0;
1684 else
1685 return fallback(ndev, skb);
1686}
1687
b5996f11 1688static const struct net_device_ops hns_nic_netdev_ops = {
1689 .ndo_open = hns_nic_net_open,
1690 .ndo_stop = hns_nic_net_stop,
1691 .ndo_start_xmit = hns_nic_net_xmit,
1692 .ndo_tx_timeout = hns_nic_net_timeout,
1693 .ndo_set_mac_address = hns_nic_net_set_mac_address,
1694 .ndo_change_mtu = hns_nic_change_mtu,
1695 .ndo_do_ioctl = hns_nic_do_ioctl,
38f616da
S		 1696 .ndo_set_features = hns_nic_set_features,
1697 .ndo_fix_features = hns_nic_fix_features,
b5996f11 1698 .ndo_get_stats64 = hns_nic_get_stats64,
1699#ifdef CONFIG_NET_POLL_CONTROLLER
1700 .ndo_poll_controller = hns_nic_poll_controller,
1701#endif
4568637f 1702 .ndo_set_rx_mode = hns_nic_set_rx_mode,
2162a4a1 1703 .ndo_select_queue = hns_nic_select_queue,
b5996f11 1704};
1705
1706static void hns_nic_update_link_status(struct net_device *netdev)
1707{
1708 struct hns_nic_priv *priv = netdev_priv(netdev);
1709
1710 struct hnae_handle *h = priv->ae_handle;
b5996f11 1711
bb7189dc
QX		 1712 if (h->phy_dev) {
1713 if (h->phy_if != PHY_INTERFACE_MODE_XGMII)
1714 return;
b5996f11 1715
bb7189dc 1716 (void)genphy_read_status(h->phy_dev);
b5996f11 1717 }
bb7189dc 1718 hns_nic_adjust_link(netdev);
b5996f11 1719}
1720
1721/* for dumping key regs*/
1722static void hns_nic_dump(struct hns_nic_priv *priv)
1723{
1724 struct hnae_handle *h = priv->ae_handle;
1725 struct hnae_ae_ops *ops = h->dev->ops;
1726 u32 *data, reg_num, i;
1727
1728 if (ops->get_regs_len && ops->get_regs) {
1729 reg_num = ops->get_regs_len(priv->ae_handle);
1730 reg_num = (reg_num + 3ul) & ~3ul;
1731 data = kcalloc(reg_num, sizeof(u32), GFP_KERNEL);
1732 if (data) {
1733 ops->get_regs(priv->ae_handle, data);
1734 for (i = 0; i < reg_num; i += 4)
1735 pr_info("0x%08x: 0x%08x 0x%08x 0x%08x 0x%08x\n",
1736 i, data[i], data[i + 1],
1737 data[i + 2], data[i + 3]);
1738 kfree(data);
1739 }
1740 }
1741
1742 for (i = 0; i < h->q_num; i++) {
1743 pr_info("tx_queue%d_next_to_clean:%d\n",
1744 i, h->qs[i]->tx_ring.next_to_clean);
1745 pr_info("tx_queue%d_next_to_use:%d\n",
1746 i, h->qs[i]->tx_ring.next_to_use);
1747 pr_info("rx_queue%d_next_to_clean:%d\n",
1748 i, h->qs[i]->rx_ring.next_to_clean);
1749 pr_info("rx_queue%d_next_to_use:%d\n",
1750 i, h->qs[i]->rx_ring.next_to_use);
1751 }
1752}
1753
f7211729 1754/* for resetting subtask */
b5996f11 1755static void hns_nic_reset_subtask(struct hns_nic_priv *priv)
1756{
1757 enum hnae_port_type type = priv->ae_handle->port_type;
1758
1759 if (!test_bit(NIC_STATE2_RESET_REQUESTED, &priv->state))
1760 return;
1761 clear_bit(NIC_STATE2_RESET_REQUESTED, &priv->state);
1762
1763 /* If we're already down, removing or resetting, just bail */
1764 if (test_bit(NIC_STATE_DOWN, &priv->state) ||
1765 test_bit(NIC_STATE_REMOVING, &priv->state) ||
1766 test_bit(NIC_STATE_RESETTING, &priv->state))
1767 return;
1768
1769 hns_nic_dump(priv);
13ac695e
S		 1770 netdev_info(priv->netdev, "try to reset %s port!\n",
1771 (type == HNAE_PORT_DEBUG ? "debug" : "service"));
b5996f11 1772
1773 rtnl_lock();
90a505b9 1774 /* put off any impending NetWatchDogTimeout */
860e9538 1775 netif_trans_update(priv->netdev);
90a505b9 1776
13ac695e 1777 if (type == HNAE_PORT_DEBUG) {
b5996f11 1778 hns_nic_net_reinit(priv->netdev);
13ac695e
S		 1779 } else {
1780 netif_carrier_off(priv->netdev);
1781 netif_tx_disable(priv->netdev);
1782 }
b5996f11 1783 rtnl_unlock();
1784}
1785
1786/* for doing service complete*/
1787static void hns_nic_service_event_complete(struct hns_nic_priv *priv)
1788{
13ac695e 1789 WARN_ON(!test_bit(NIC_STATE_SERVICE_SCHED, &priv->state));
b5996f11 1790
1791 smp_mb__before_atomic();
1792 clear_bit(NIC_STATE_SERVICE_SCHED, &priv->state);
1793}
1794
1795static void hns_nic_service_task(struct work_struct *work)
1796{
1797 struct hns_nic_priv *priv
1798 = container_of(work, struct hns_nic_priv, service_task);
1799 struct hnae_handle *h = priv->ae_handle;
1800
1801 hns_nic_update_link_status(priv->netdev);
1802 h->dev->ops->update_led_status(h);
1803 hns_nic_update_stats(priv->netdev);
1804
1805 hns_nic_reset_subtask(priv);
1806 hns_nic_service_event_complete(priv);
1807}
1808
1809static void hns_nic_task_schedule(struct hns_nic_priv *priv)
1810{
1811 if (!test_bit(NIC_STATE_DOWN, &priv->state) &&
1812 !test_bit(NIC_STATE_REMOVING, &priv->state) &&
1813 !test_and_set_bit(NIC_STATE_SERVICE_SCHED, &priv->state))
1814 (void)schedule_work(&priv->service_task);
1815}
1816
1817static void hns_nic_service_timer(unsigned long data)
1818{
1819 struct hns_nic_priv *priv = (struct hns_nic_priv *)data;
1820
1821 (void)mod_timer(&priv->service_timer, jiffies + SERVICE_TIMER_HZ);
1822
1823 hns_nic_task_schedule(priv);
1824}
1825
1826/**
1827 * hns_tx_timeout_reset - initiate reset due to Tx timeout
1828 * @priv: driver private struct
1829 **/
1830static void hns_tx_timeout_reset(struct hns_nic_priv *priv)
1831{
1832 /* Do the reset outside of interrupt context */
1833 if (!test_bit(NIC_STATE_DOWN, &priv->state)) {
1834 set_bit(NIC_STATE2_RESET_REQUESTED, &priv->state);
1835 netdev_warn(priv->netdev,
1836 "initiating reset due to tx timeout(%llu,0x%lx)\n",
1837 priv->tx_timeout_count, priv->state);
1838 priv->tx_timeout_count++;
1839 hns_nic_task_schedule(priv);
1840 }
1841}
1842
1843static int hns_nic_init_ring_data(struct hns_nic_priv *priv)
1844{
1845 struct hnae_handle *h = priv->ae_handle;
1846 struct hns_nic_ring_data *rd;
4b34aa41 1847 bool is_ver1 = AE_IS_VER1(priv->enet_ver);
b5996f11 1848 int i;
1849
1850 if (h->q_num > NIC_MAX_Q_PER_VF) {
1851 netdev_err(priv->netdev, "too much queue (%d)\n", h->q_num);
1852 return -EINVAL;
1853 }
1854
1855 priv->ring_data = kzalloc(h->q_num * sizeof(*priv->ring_data) * 2,
1856 GFP_KERNEL);
1857 if (!priv->ring_data)
1858 return -ENOMEM;
1859
1860 for (i = 0; i < h->q_num; i++) {
1861 rd = &priv->ring_data[i];
1862 rd->queue_index = i;
1863 rd->ring = &h->qs[i]->tx_ring;
1864 rd->poll_one = hns_nic_tx_poll_one;
cee5add4
DH		 1865 rd->fini_process = is_ver1 ? hns_nic_tx_fini_pro :
1866 hns_nic_tx_fini_pro_v2;
b5996f11 1867
1868 netif_napi_add(priv->netdev, &rd->napi,
1869 hns_nic_common_poll, NIC_TX_CLEAN_MAX_NUM);
1870 rd->ring->irq_init_flag = RCB_IRQ_NOT_INITED;
1871 }
1872 for (i = h->q_num; i < h->q_num * 2; i++) {
1873 rd = &priv->ring_data[i];
1874 rd->queue_index = i - h->q_num;
1875 rd->ring = &h->qs[i - h->q_num]->rx_ring;
1876 rd->poll_one = hns_nic_rx_poll_one;
1877 rd->ex_process = hns_nic_rx_up_pro;
cee5add4
DH		 1878 rd->fini_process = is_ver1 ? hns_nic_rx_fini_pro :
1879 hns_nic_rx_fini_pro_v2;
b5996f11 1880
1881 netif_napi_add(priv->netdev, &rd->napi,
1882 hns_nic_common_poll, NIC_RX_CLEAN_MAX_NUM);
1883 rd->ring->irq_init_flag = RCB_IRQ_NOT_INITED;
1884 }
1885
1886 return 0;
1887}
1888
1889static void hns_nic_uninit_ring_data(struct hns_nic_priv *priv)
1890{
1891 struct hnae_handle *h = priv->ae_handle;
1892 int i;
1893
1894 for (i = 0; i < h->q_num * 2; i++) {
1895 netif_napi_del(&priv->ring_data[i].napi);
1896 if (priv->ring_data[i].ring->irq_init_flag == RCB_IRQ_INITED) {
13ac695e
S		 1897 (void)irq_set_affinity_hint(
1898 priv->ring_data[i].ring->irq,
1899 NULL);
b5996f11 1900 free_irq(priv->ring_data[i].ring->irq,
1901 &priv->ring_data[i]);
1902 }
1903
1904 priv->ring_data[i].ring->irq_init_flag = RCB_IRQ_NOT_INITED;
1905 }
1906 kfree(priv->ring_data);
1907}
1908
13ac695e
S		 1909static void hns_nic_set_priv_ops(struct net_device *netdev)
1910{
1911 struct hns_nic_priv *priv = netdev_priv(netdev);
64353af6 1912 struct hnae_handle *h = priv->ae_handle;
13ac695e
S		 1913
1914 if (AE_IS_VER1(priv->enet_ver)) {
1915 priv->ops.fill_desc = fill_desc;
1916 priv->ops.get_rxd_bnum = get_rx_desc_bnum;
1917 priv->ops.maybe_stop_tx = hns_nic_maybe_stop_tx;
1918 } else {
1919 priv->ops.get_rxd_bnum = get_v2rx_desc_bnum;
64353af6
S		 1920 if ((netdev->features & NETIF_F_TSO) ||
1921 (netdev->features & NETIF_F_TSO6)) {
1922 priv->ops.fill_desc = fill_tso_desc;
1923 priv->ops.maybe_stop_tx = hns_nic_maybe_stop_tso;
1924 /* This chip only support 7*4096 */
1925 netif_set_gso_max_size(netdev, 7 * 4096);
64353af6
S		 1926 } else {
1927 priv->ops.fill_desc = fill_v2_desc;
1928 priv->ops.maybe_stop_tx = hns_nic_maybe_stop_tx;
1929 }
6fe27464
DH		 1930 /* enable tso when init
1931 * control tso on/off through TSE bit in bd
1932 */
1933 h->dev->ops->set_tso_stats(h, 1);
13ac695e
S		 1934 }
1935}
1936
b5996f11 1937static int hns_nic_try_get_ae(struct net_device *ndev)
1938{
1939 struct hns_nic_priv *priv = netdev_priv(ndev);
1940 struct hnae_handle *h;
1941 int ret;
1942
1943 h = hnae_get_handle(&priv->netdev->dev,
7b2acae6 1944 priv->fwnode, priv->port_id, NULL);
b5996f11 1945 if (IS_ERR_OR_NULL(h)) {
daa8cfd9 1946 ret = -ENODEV;
b5996f11 1947 dev_dbg(priv->dev, "has not handle, register notifier!\n");
1948 goto out;
1949 }
1950 priv->ae_handle = h;
1951
1952 ret = hns_nic_init_phy(ndev, h);
1953 if (ret) {
1954 dev_err(priv->dev, "probe phy device fail!\n");
1955 goto out_init_phy;
1956 }
1957
1958 ret = hns_nic_init_ring_data(priv);
1959 if (ret) {
1960 ret = -ENOMEM;
1961 goto out_init_ring_data;
1962 }
1963
13ac695e
S		 1964 hns_nic_set_priv_ops(ndev);
1965
b5996f11 1966 ret = register_netdev(ndev);
1967 if (ret) {
1968 dev_err(priv->dev, "probe register netdev fail!\n");
1969 goto out_reg_ndev_fail;
1970 }
1971 return 0;
1972
1973out_reg_ndev_fail:
1974 hns_nic_uninit_ring_data(priv);
1975 priv->ring_data = NULL;
1976out_init_phy:
1977out_init_ring_data:
1978 hnae_put_handle(priv->ae_handle);
1979 priv->ae_handle = NULL;
1980out:
1981 return ret;
1982}
1983
1984static int hns_nic_notifier_action(struct notifier_block *nb,
1985 unsigned long action, void *data)
1986{
1987 struct hns_nic_priv *priv =
1988 container_of(nb, struct hns_nic_priv, notifier_block);
1989
1990 assert(action == HNAE_AE_REGISTER);
1991
1992 if (!hns_nic_try_get_ae(priv->netdev)) {
1993 hnae_unregister_notifier(&priv->notifier_block);
1994 priv->notifier_block.notifier_call = NULL;
1995 }
1996 return 0;
1997}
1998
1999static int hns_nic_dev_probe(struct platform_device *pdev)
2000{
2001 struct device *dev = &pdev->dev;
2002 struct net_device *ndev;
2003 struct hns_nic_priv *priv;
406adee9 2004 u32 port_id;
b5996f11 2005 int ret;
2006
2007 ndev = alloc_etherdev_mq(sizeof(struct hns_nic_priv), NIC_MAX_Q_PER_VF);
2008 if (!ndev)
2009 return -ENOMEM;
2010
2011 platform_set_drvdata(pdev, ndev);
2012
2013 priv = netdev_priv(ndev);
2014 priv->dev = dev;
2015 priv->netdev = ndev;
2016
63434888
KY		 2017 if (dev_of_node(dev)) {
2018 struct device_node *ae_node;
b5996f11 2019
63434888
KY		 2020 if (of_device_is_compatible(dev->of_node,
2021 "hisilicon,hns-nic-v1"))
2022 priv->enet_ver = AE_VERSION_1;
2023 else
2024 priv->enet_ver = AE_VERSION_2;
2025
2026 ae_node = of_parse_phandle(dev->of_node, "ae-handle", 0);
2027 if (IS_ERR_OR_NULL(ae_node)) {
2028 ret = PTR_ERR(ae_node);
2029 dev_err(dev, "not find ae-handle\n");
2030 goto out_read_prop_fail;
2031 }
2032 priv->fwnode = &ae_node->fwnode;
2033 } else if (is_acpi_node(dev->fwnode)) {
2034 struct acpi_reference_args args;
2035
2036 if (acpi_dev_found(hns_enet_acpi_match[0].id))
2037 priv->enet_ver = AE_VERSION_1;
2038 else if (acpi_dev_found(hns_enet_acpi_match[1].id))
2039 priv->enet_ver = AE_VERSION_2;
2040 else
2041 return -ENXIO;
2042
2043 /* try to find port-idx-in-ae first */
2044 ret = acpi_node_get_property_reference(dev->fwnode,
2045 "ae-handle", 0, &args);
2046 if (ret) {
2047 dev_err(dev, "not find ae-handle\n");
2048 goto out_read_prop_fail;
2049 }
2050 priv->fwnode = acpi_fwnode_handle(args.adev);
2051 } else {
2052 dev_err(dev, "cannot read cfg data from OF or acpi\n");
2053 return -ENXIO;
48189d6a 2054 }
7b2acae6 2055
6162928c 2056 ret = device_property_read_u32(dev, "port-idx-in-ae", &port_id);
406adee9
YZZ		 2057 if (ret) {
2058 /* only for old code compatible */
6162928c 2059 ret = device_property_read_u32(dev, "port-id", &port_id);
406adee9
YZZ		 2060 if (ret)
2061 goto out_read_prop_fail;
2062 /* for old dts, we need to caculate the port offset */
2063 port_id = port_id < HNS_SRV_OFFSET ? port_id + HNS_DEBUG_OFFSET
2064 : port_id - HNS_SRV_OFFSET;
2065 }
2066 priv->port_id = port_id;
b5996f11 2067
2068 hns_init_mac_addr(ndev);
2069
2070 ndev->watchdog_timeo = HNS_NIC_TX_TIMEOUT;
2071 ndev->priv_flags |= IFF_UNICAST_FLT;
2072 ndev->netdev_ops = &hns_nic_netdev_ops;
2073 hns_ethtool_set_ops(ndev);
13ac695e 2074
b5996f11 2075 ndev->features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
2076 NETIF_F_RXCSUM | NETIF_F_SG | NETIF_F_GSO |
2077 NETIF_F_GRO;
2078 ndev->vlan_features |=
2079 NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM | NETIF_F_RXCSUM;
2080 ndev->vlan_features |= NETIF_F_SG | NETIF_F_GSO | NETIF_F_GRO;
2081
44770e11
JW		 2082 /* MTU range: 68 - 9578 (v1) or 9706 (v2) */
2083 ndev->min_mtu = MAC_MIN_MTU;
13ac695e
S		 2084 switch (priv->enet_ver) {
2085 case AE_VERSION_2:
64353af6 2086 ndev->features |= NETIF_F_TSO | NETIF_F_TSO6;
13ac695e
S		 2087 ndev->hw_features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
2088 NETIF_F_RXCSUM | NETIF_F_SG | NETIF_F_GSO |
64353af6 2089 NETIF_F_GRO | NETIF_F_TSO | NETIF_F_TSO6;
44770e11
JW		 2090 ndev->max_mtu = MAC_MAX_MTU_V2 -
2091 (ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN);
13ac695e
S		 2092 break;
2093 default:
44770e11
JW		 2094 ndev->max_mtu = MAC_MAX_MTU -
2095 (ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN);
13ac695e
S		 2096 break;
2097 }
2098
b5996f11 2099 SET_NETDEV_DEV(ndev, dev);
2100
2101 if (!dma_set_mask_and_coherent(dev, DMA_BIT_MASK(64)))
2102 dev_dbg(dev, "set mask to 64bit\n");
2103 else
39c94417 2104 dev_err(dev, "set mask to 64bit fail!\n");
b5996f11 2105
2106 /* carrier off reporting is important to ethtool even BEFORE open */
2107 netif_carrier_off(ndev);
2108
2109 setup_timer(&priv->service_timer, hns_nic_service_timer,
2110 (unsigned long)priv);
2111 INIT_WORK(&priv->service_task, hns_nic_service_task);
2112
2113 set_bit(NIC_STATE_SERVICE_INITED, &priv->state);
2114 clear_bit(NIC_STATE_SERVICE_SCHED, &priv->state);
2115 set_bit(NIC_STATE_DOWN, &priv->state);
2116
2117 if (hns_nic_try_get_ae(priv->netdev)) {
2118 priv->notifier_block.notifier_call = hns_nic_notifier_action;
2119 ret = hnae_register_notifier(&priv->notifier_block);
2120 if (ret) {
2121 dev_err(dev, "register notifier fail!\n");
2122 goto out_notify_fail;
2123 }
2124 dev_dbg(dev, "has not handle, register notifier!\n");
2125 }
2126
2127 return 0;
2128
2129out_notify_fail:
2130 (void)cancel_work_sync(&priv->service_task);
48189d6a 2131out_read_prop_fail:
b5996f11 2132 free_netdev(ndev);
2133 return ret;
2134}
2135
2136static int hns_nic_dev_remove(struct platform_device *pdev)
2137{
2138 struct net_device *ndev = platform_get_drvdata(pdev);
2139 struct hns_nic_priv *priv = netdev_priv(ndev);
2140
2141 if (ndev->reg_state != NETREG_UNINITIALIZED)
2142 unregister_netdev(ndev);
2143
2144 if (priv->ring_data)
2145 hns_nic_uninit_ring_data(priv);
2146 priv->ring_data = NULL;
2147
262b38cd
PR		 2148 if (ndev->phydev)
2149 phy_disconnect(ndev->phydev);
b5996f11 2150
2151 if (!IS_ERR_OR_NULL(priv->ae_handle))
2152 hnae_put_handle(priv->ae_handle);
2153 priv->ae_handle = NULL;
2154 if (priv->notifier_block.notifier_call)
2155 hnae_unregister_notifier(&priv->notifier_block);
2156 priv->notifier_block.notifier_call = NULL;
2157
2158 set_bit(NIC_STATE_REMOVING, &priv->state);
2159 (void)cancel_work_sync(&priv->service_task);
2160
2161 free_netdev(ndev);
2162 return 0;
2163}
2164
2165static const struct of_device_id hns_enet_of_match[] = {
2166 {.compatible = "hisilicon,hns-nic-v1",},
2167 {.compatible = "hisilicon,hns-nic-v2",},
2168 {},
2169};
2170
2171MODULE_DEVICE_TABLE(of, hns_enet_of_match);
2172
2173static struct platform_driver hns_nic_dev_driver = {
2174 .driver = {
2175 .name = "hns-nic",
b5996f11 2176 .of_match_table = hns_enet_of_match,
63434888 2177 .acpi_match_table = ACPI_PTR(hns_enet_acpi_match),
b5996f11 2178 },
2179 .probe = hns_nic_dev_probe,
2180 .remove = hns_nic_dev_remove,
2181};
2182
2183module_platform_driver(hns_nic_dev_driver);
2184
2185MODULE_DESCRIPTION("HISILICON HNS Ethernet driver");
2186MODULE_AUTHOR("Hisilicon, Inc.");
2187MODULE_LICENSE("GPL");
2188MODULE_ALIAS("platform:hns-nic");
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