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Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/klassert/ipsec...
[linux-2.6-block.git] / drivers / net / ethernet / hisilicon / hns / hns_enet.c
CommitLineData
b5996f11 1/*
2 * Copyright (c) 2014-2015 Hisilicon Limited.
3 *
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
8 */
9
10#include <linux/clk.h>
11#include <linux/cpumask.h>
12#include <linux/etherdevice.h>
13#include <linux/if_vlan.h>
14#include <linux/interrupt.h>
15#include <linux/io.h>
16#include <linux/ip.h>
17#include <linux/ipv6.h>
18#include <linux/module.h>
19#include <linux/phy.h>
20#include <linux/platform_device.h>
21#include <linux/skbuff.h>
22
23#include "hnae.h"
24#include "hns_enet.h"
44770e11 25#include "hns_dsaf_mac.h"
b5996f11 26
27#define NIC_MAX_Q_PER_VF 16
28#define HNS_NIC_TX_TIMEOUT (5 * HZ)
29
30#define SERVICE_TIMER_HZ (1 * HZ)
31
32#define NIC_TX_CLEAN_MAX_NUM 256
33#define NIC_RX_CLEAN_MAX_NUM 64
34
b5996f11 35#define RCB_IRQ_NOT_INITED 0
36#define RCB_IRQ_INITED 1
9cbe9fd5 37#define HNS_BUFFER_SIZE_2048 2048
b5996f11 38
13ac695e
S		 39#define BD_MAX_SEND_SIZE 8191
40#define SKB_TMP_LEN(SKB) \
41 (((SKB)->transport_header - (SKB)->mac_header) + tcp_hdrlen(SKB))
42
43static void fill_v2_desc(struct hnae_ring *ring, void *priv,
44 int size, dma_addr_t dma, int frag_end,
45 int buf_num, enum hns_desc_type type, int mtu)
46{
47 struct hnae_desc *desc = &ring->desc[ring->next_to_use];
48 struct hnae_desc_cb *desc_cb = &ring->desc_cb[ring->next_to_use];
49 struct iphdr *iphdr;
50 struct ipv6hdr *ipv6hdr;
51 struct sk_buff *skb;
13ac695e
S		 52 __be16 protocol;
53 u8 bn_pid = 0;
54 u8 rrcfv = 0;
55 u8 ip_offset = 0;
56 u8 tvsvsn = 0;
57 u16 mss = 0;
58 u8 l4_len = 0;
59 u16 paylen = 0;
60
61 desc_cb->priv = priv;
62 desc_cb->length = size;
63 desc_cb->dma = dma;
64 desc_cb->type = type;
65
66 desc->addr = cpu_to_le64(dma);
67 desc->tx.send_size = cpu_to_le16((u16)size);
68
f8a1a636 69 /* config bd buffer end */
13ac695e
S		 70 hnae_set_bit(rrcfv, HNSV2_TXD_VLD_B, 1);
71 hnae_set_field(bn_pid, HNSV2_TXD_BUFNUM_M, 0, buf_num - 1);
72
f8a1a636
SL		 73 /* fill port_id in the tx bd for sending management pkts */
74 hnae_set_field(bn_pid, HNSV2_TXD_PORTID_M,
75 HNSV2_TXD_PORTID_S, ring->q->handle->dport_id);
76
13ac695e
S		 77 if (type == DESC_TYPE_SKB) {
78 skb = (struct sk_buff *)priv;
79
80 if (skb->ip_summed == CHECKSUM_PARTIAL) {
81 skb_reset_mac_len(skb);
82 protocol = skb->protocol;
83 ip_offset = ETH_HLEN;
84
85 if (protocol == htons(ETH_P_8021Q)) {
86 ip_offset += VLAN_HLEN;
87 protocol = vlan_get_protocol(skb);
88 skb->protocol = protocol;
89 }
90
91 if (skb->protocol == htons(ETH_P_IP)) {
92 iphdr = ip_hdr(skb);
93 hnae_set_bit(rrcfv, HNSV2_TXD_L3CS_B, 1);
94 hnae_set_bit(rrcfv, HNSV2_TXD_L4CS_B, 1);
95
96 /* check for tcp/udp header */
0b51b1dc
DH		 97 if (iphdr->protocol == IPPROTO_TCP &&
98 skb_is_gso(skb)) {
13ac695e
S		 99 hnae_set_bit(tvsvsn,
100 HNSV2_TXD_TSE_B, 1);
13ac695e 101 l4_len = tcp_hdrlen(skb);
0b51b1dc
DH		 102 mss = skb_shinfo(skb)->gso_size;
103 paylen = skb->len - SKB_TMP_LEN(skb);
13ac695e
S		 104 }
105 } else if (skb->protocol == htons(ETH_P_IPV6)) {
106 hnae_set_bit(tvsvsn, HNSV2_TXD_IPV6_B, 1);
107 ipv6hdr = ipv6_hdr(skb);
108 hnae_set_bit(rrcfv, HNSV2_TXD_L4CS_B, 1);
109
110 /* check for tcp/udp header */
0b51b1dc
DH		 111 if (ipv6hdr->nexthdr == IPPROTO_TCP &&
112 skb_is_gso(skb) && skb_is_gso_v6(skb)) {
13ac695e
S		 113 hnae_set_bit(tvsvsn,
114 HNSV2_TXD_TSE_B, 1);
13ac695e 115 l4_len = tcp_hdrlen(skb);
0b51b1dc
DH		 116 mss = skb_shinfo(skb)->gso_size;
117 paylen = skb->len - SKB_TMP_LEN(skb);
13ac695e
S		 118 }
119 }
120 desc->tx.ip_offset = ip_offset;
121 desc->tx.tse_vlan_snap_v6_sctp_nth = tvsvsn;
122 desc->tx.mss = cpu_to_le16(mss);
123 desc->tx.l4_len = l4_len;
124 desc->tx.paylen = cpu_to_le16(paylen);
125 }
126 }
127
128 hnae_set_bit(rrcfv, HNSV2_TXD_FE_B, frag_end);
129
130 desc->tx.bn_pid = bn_pid;
131 desc->tx.ra_ri_cs_fe_vld = rrcfv;
132
133 ring_ptr_move_fw(ring, next_to_use);
134}
135
63434888
KY		 136static const struct acpi_device_id hns_enet_acpi_match[] = {
137 { "HISI00C1", 0 },
138 { "HISI00C2", 0 },
139 { },
140};
141MODULE_DEVICE_TABLE(acpi, hns_enet_acpi_match);
142
b5996f11 143static void fill_desc(struct hnae_ring *ring, void *priv,
144 int size, dma_addr_t dma, int frag_end,
13ac695e 145 int buf_num, enum hns_desc_type type, int mtu)
b5996f11 146{
147 struct hnae_desc *desc = &ring->desc[ring->next_to_use];
148 struct hnae_desc_cb *desc_cb = &ring->desc_cb[ring->next_to_use];
149 struct sk_buff *skb;
150 __be16 protocol;
151 u32 ip_offset;
152 u32 asid_bufnum_pid = 0;
153 u32 flag_ipoffset = 0;
154
155 desc_cb->priv = priv;
156 desc_cb->length = size;
157 desc_cb->dma = dma;
158 desc_cb->type = type;
159
160 desc->addr = cpu_to_le64(dma);
161 desc->tx.send_size = cpu_to_le16((u16)size);
162
163 /*config bd buffer end */
164 flag_ipoffset |= 1 << HNS_TXD_VLD_B;
165
166 asid_bufnum_pid |= buf_num << HNS_TXD_BUFNUM_S;
167
168 if (type == DESC_TYPE_SKB) {
169 skb = (struct sk_buff *)priv;
170
171 if (skb->ip_summed == CHECKSUM_PARTIAL) {
172 protocol = skb->protocol;
173 ip_offset = ETH_HLEN;
174
175 /*if it is a SW VLAN check the next protocol*/
176 if (protocol == htons(ETH_P_8021Q)) {
177 ip_offset += VLAN_HLEN;
178 protocol = vlan_get_protocol(skb);
179 skb->protocol = protocol;
180 }
181
182 if (skb->protocol == htons(ETH_P_IP)) {
183 flag_ipoffset |= 1 << HNS_TXD_L3CS_B;
184 /* check for tcp/udp header */
185 flag_ipoffset |= 1 << HNS_TXD_L4CS_B;
186
187 } else if (skb->protocol == htons(ETH_P_IPV6)) {
188 /* ipv6 has not l3 cs, check for L4 header */
189 flag_ipoffset |= 1 << HNS_TXD_L4CS_B;
190 }
191
192 flag_ipoffset |= ip_offset << HNS_TXD_IPOFFSET_S;
193 }
194 }
195
196 flag_ipoffset |= frag_end << HNS_TXD_FE_B;
197
198 desc->tx.asid_bufnum_pid = cpu_to_le16(asid_bufnum_pid);
199 desc->tx.flag_ipoffset = cpu_to_le32(flag_ipoffset);
200
201 ring_ptr_move_fw(ring, next_to_use);
202}
203
204static void unfill_desc(struct hnae_ring *ring)
205{
206 ring_ptr_move_bw(ring, next_to_use);
207}
208
13ac695e
S		 209static int hns_nic_maybe_stop_tx(
210 struct sk_buff **out_skb, int *bnum, struct hnae_ring *ring)
b5996f11 211{
13ac695e
S		 212 struct sk_buff *skb = *out_skb;
213 struct sk_buff *new_skb = NULL;
b5996f11 214 int buf_num;
b5996f11 215
216 /* no. of segments (plus a header) */
217 buf_num = skb_shinfo(skb)->nr_frags + 1;
218
219 if (unlikely(buf_num > ring->max_desc_num_per_pkt)) {
13ac695e
S		 220 if (ring_space(ring) < 1)
221 return -EBUSY;
b5996f11 222
223 new_skb = skb_copy(skb, GFP_ATOMIC);
13ac695e
S		 224 if (!new_skb)
225 return -ENOMEM;
b5996f11 226
227 dev_kfree_skb_any(skb);
13ac695e 228 *out_skb = new_skb;
b5996f11 229 buf_num = 1;
b5996f11 230 } else if (buf_num > ring_space(ring)) {
13ac695e
S		 231 return -EBUSY;
232 }
233
234 *bnum = buf_num;
235 return 0;
236}
237
64353af6
S		 238static int hns_nic_maybe_stop_tso(
239 struct sk_buff **out_skb, int *bnum, struct hnae_ring *ring)
240{
241 int i;
242 int size;
243 int buf_num;
244 int frag_num;
245 struct sk_buff *skb = *out_skb;
246 struct sk_buff *new_skb = NULL;
247 struct skb_frag_struct *frag;
248
249 size = skb_headlen(skb);
250 buf_num = (size + BD_MAX_SEND_SIZE - 1) / BD_MAX_SEND_SIZE;
251
252 frag_num = skb_shinfo(skb)->nr_frags;
253 for (i = 0; i < frag_num; i++) {
254 frag = &skb_shinfo(skb)->frags[i];
255 size = skb_frag_size(frag);
256 buf_num += (size + BD_MAX_SEND_SIZE - 1) / BD_MAX_SEND_SIZE;
257 }
258
259 if (unlikely(buf_num > ring->max_desc_num_per_pkt)) {
260 buf_num = (skb->len + BD_MAX_SEND_SIZE - 1) / BD_MAX_SEND_SIZE;
261 if (ring_space(ring) < buf_num)
262 return -EBUSY;
263 /* manual split the send packet */
264 new_skb = skb_copy(skb, GFP_ATOMIC);
265 if (!new_skb)
266 return -ENOMEM;
267 dev_kfree_skb_any(skb);
268 *out_skb = new_skb;
269
270 } else if (ring_space(ring) < buf_num) {
271 return -EBUSY;
272 }
273
274 *bnum = buf_num;
275 return 0;
276}
277
278static void fill_tso_desc(struct hnae_ring *ring, void *priv,
279 int size, dma_addr_t dma, int frag_end,
280 int buf_num, enum hns_desc_type type, int mtu)
281{
282 int frag_buf_num;
283 int sizeoflast;
284 int k;
285
286 frag_buf_num = (size + BD_MAX_SEND_SIZE - 1) / BD_MAX_SEND_SIZE;
287 sizeoflast = size % BD_MAX_SEND_SIZE;
288 sizeoflast = sizeoflast ? sizeoflast : BD_MAX_SEND_SIZE;
289
290 /* when the frag size is bigger than hardware, split this frag */
291 for (k = 0; k < frag_buf_num; k++)
292 fill_v2_desc(ring, priv,
293 (k == frag_buf_num - 1) ?
294 sizeoflast : BD_MAX_SEND_SIZE,
295 dma + BD_MAX_SEND_SIZE * k,
296 frag_end && (k == frag_buf_num - 1) ? 1 : 0,
297 buf_num,
298 (type == DESC_TYPE_SKB && !k) ?
299 DESC_TYPE_SKB : DESC_TYPE_PAGE,
300 mtu);
301}
302
13ac695e
S		 303int hns_nic_net_xmit_hw(struct net_device *ndev,
304 struct sk_buff *skb,
305 struct hns_nic_ring_data *ring_data)
306{
307 struct hns_nic_priv *priv = netdev_priv(ndev);
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);
b5996f11 800}
801
0e97cd4e 802static int hns_desc_unused(struct hnae_ring *ring)
803{
804 int ntc = ring->next_to_clean;
805 int ntu = ring->next_to_use;
806
807 return ((ntc >= ntu) ? 0 : ring->desc_num) + ntc - ntu;
808}
809
b5996f11 810static int hns_nic_rx_poll_one(struct hns_nic_ring_data *ring_data,
811 int budget, void *v)
812{
813 struct hnae_ring *ring = ring_data->ring;
814 struct sk_buff *skb;
34447271 815 int num, bnum;
b5996f11 816#define RCB_NOF_ALLOC_RX_BUFF_ONCE 16
817 int recv_pkts, recv_bds, clean_count, err;
0e97cd4e 818 int unused_count = hns_desc_unused(ring);
b5996f11 819
820 num = readl_relaxed(ring->io_base + RCB_REG_FBDNUM);
821 rmb(); /* make sure num taken effect before the other data is touched */
822
823 recv_pkts = 0, recv_bds = 0, clean_count = 0;
0e97cd4e 824 num -= unused_count;
34447271 825
b5996f11 826 while (recv_pkts < budget && recv_bds < num) {
6ba312eb 827 /* reuse or realloc buffers */
0e97cd4e 828 if (clean_count + unused_count >= RCB_NOF_ALLOC_RX_BUFF_ONCE) {
829 hns_nic_alloc_rx_buffers(ring_data,
830 clean_count + unused_count);
b5996f11 831 clean_count = 0;
0e97cd4e 832 unused_count = hns_desc_unused(ring);
b5996f11 833 }
834
6ba312eb 835 /* poll one pkt */
b5996f11 836 err = hns_nic_poll_rx_skb(ring_data, &skb, &bnum);
837 if (unlikely(!skb)) /* this fault cannot be repaired */
3a31b64e 838 goto out;
b5996f11 839
840 recv_bds += bnum;
841 clean_count += bnum;
842 if (unlikely(err)) { /* do jump the err */
843 recv_pkts++;
844 continue;
845 }
846
847 /* do update ip stack process*/
848 ((void (*)(struct hns_nic_ring_data *, struct sk_buff *))v)(
849 ring_data, skb);
850 recv_pkts++;
851 }
852
3a31b64e 853out:
13ac695e 854 /* make all data has been write before submit */
0e97cd4e 855 if (clean_count + unused_count > 0)
856 hns_nic_alloc_rx_buffers(ring_data,
857 clean_count + unused_count);
13ac695e 858
b5996f11 859 return recv_pkts;
860}
861
862static void hns_nic_rx_fini_pro(struct hns_nic_ring_data *ring_data)
863{
864 struct hnae_ring *ring = ring_data->ring;
865 int num = 0;
866
cee5add4
DH		 867 ring_data->ring->q->handle->dev->ops->toggle_ring_irq(ring, 0);
868
b5996f11 869 /* for hardware bug fixed */
870 num = readl_relaxed(ring->io_base + RCB_REG_FBDNUM);
871
872 if (num > 0) {
873 ring_data->ring->q->handle->dev->ops->toggle_ring_irq(
874 ring_data->ring, 1);
875
876 napi_schedule(&ring_data->napi);
877 }
878}
879
cee5add4
DH		 880static void hns_nic_rx_fini_pro_v2(struct hns_nic_ring_data *ring_data)
881{
882 struct hnae_ring *ring = ring_data->ring;
883 int num = 0;
884
885 num = readl_relaxed(ring->io_base + RCB_REG_FBDNUM);
886
887 if (num == 0)
888 ring_data->ring->q->handle->dev->ops->toggle_ring_irq(
889 ring, 0);
890 else
891 napi_schedule(&ring_data->napi);
892}
893
b5996f11 894static inline void hns_nic_reclaim_one_desc(struct hnae_ring *ring,
895 int *bytes, int *pkts)
896{
897 struct hnae_desc_cb *desc_cb = &ring->desc_cb[ring->next_to_clean];
898
899 (*pkts) += (desc_cb->type == DESC_TYPE_SKB);
900 (*bytes) += desc_cb->length;
901 /* desc_cb will be cleaned, after hnae_free_buffer_detach*/
902 hnae_free_buffer_detach(ring, ring->next_to_clean);
903
904 ring_ptr_move_fw(ring, next_to_clean);
905}
906
907static int is_valid_clean_head(struct hnae_ring *ring, int h)
908{
909 int u = ring->next_to_use;
910 int c = ring->next_to_clean;
911
912 if (unlikely(h > ring->desc_num))
913 return 0;
914
915 assert(u > 0 && u < ring->desc_num);
916 assert(c > 0 && c < ring->desc_num);
917 assert(u != c && h != c); /* must be checked before call this func */
918
919 return u > c ? (h > c && h <= u) : (h > c || h <= u);
920}
921
922/* netif_tx_lock will turn down the performance, set only when necessary */
923#ifdef CONFIG_NET_POLL_CONTROLLER
924#define NETIF_TX_LOCK(ndev) netif_tx_lock(ndev)
925#define NETIF_TX_UNLOCK(ndev) netif_tx_unlock(ndev)
926#else
927#define NETIF_TX_LOCK(ndev)
928#define NETIF_TX_UNLOCK(ndev)
929#endif
930/* reclaim all desc in one budget
931 * return error or number of desc left
932 */
933static int hns_nic_tx_poll_one(struct hns_nic_ring_data *ring_data,
934 int budget, void *v)
935{
936 struct hnae_ring *ring = ring_data->ring;
937 struct net_device *ndev = ring_data->napi.dev;
938 struct netdev_queue *dev_queue;
939 struct hns_nic_priv *priv = netdev_priv(ndev);
940 int head;
941 int bytes, pkts;
942
943 NETIF_TX_LOCK(ndev);
944
945 head = readl_relaxed(ring->io_base + RCB_REG_HEAD);
946 rmb(); /* make sure head is ready before touch any data */
947
948 if (is_ring_empty(ring) || head == ring->next_to_clean) {
949 NETIF_TX_UNLOCK(ndev);
950 return 0; /* no data to poll */
951 }
952
953 if (!is_valid_clean_head(ring, head)) {
954 netdev_err(ndev, "wrong head (%d, %d-%d)\n", head,
955 ring->next_to_use, ring->next_to_clean);
956 ring->stats.io_err_cnt++;
957 NETIF_TX_UNLOCK(ndev);
958 return -EIO;
959 }
960
961 bytes = 0;
962 pkts = 0;
9cbe9fd5 963 while (head != ring->next_to_clean) {
b5996f11 964 hns_nic_reclaim_one_desc(ring, &bytes, &pkts);
9cbe9fd5 965 /* issue prefetch for next Tx descriptor */
966 prefetch(&ring->desc_cb[ring->next_to_clean]);
967 }
b5996f11 968
969 NETIF_TX_UNLOCK(ndev);
970
971 dev_queue = netdev_get_tx_queue(ndev, ring_data->queue_index);
972 netdev_tx_completed_queue(dev_queue, pkts, bytes);
973
13ac695e
S		 974 if (unlikely(priv->link && !netif_carrier_ok(ndev)))
975 netif_carrier_on(ndev);
976
b5996f11 977 if (unlikely(pkts && netif_carrier_ok(ndev) &&
978 (ring_space(ring) >= ring->max_desc_num_per_pkt * 2))) {
979 /* Make sure that anybody stopping the queue after this
980 * sees the new next_to_clean.
981 */
982 smp_mb();
983 if (netif_tx_queue_stopped(dev_queue) &&
984 !test_bit(NIC_STATE_DOWN, &priv->state)) {
985 netif_tx_wake_queue(dev_queue);
986 ring->stats.restart_queue++;
987 }
988 }
989 return 0;
990}
991
992static void hns_nic_tx_fini_pro(struct hns_nic_ring_data *ring_data)
993{
994 struct hnae_ring *ring = ring_data->ring;
cee5add4
DH		 995 int head;
996
997 ring_data->ring->q->handle->dev->ops->toggle_ring_irq(ring, 0);
998
999 head = readl_relaxed(ring->io_base + RCB_REG_HEAD);
b5996f11 1000
1001 if (head != ring->next_to_clean) {
1002 ring_data->ring->q->handle->dev->ops->toggle_ring_irq(
1003 ring_data->ring, 1);
1004
1005 napi_schedule(&ring_data->napi);
1006 }
1007}
1008
cee5add4
DH		 1009static void hns_nic_tx_fini_pro_v2(struct hns_nic_ring_data *ring_data)
1010{
1011 struct hnae_ring *ring = ring_data->ring;
1012 int head = readl_relaxed(ring->io_base + RCB_REG_HEAD);
1013
1014 if (head == ring->next_to_clean)
1015 ring_data->ring->q->handle->dev->ops->toggle_ring_irq(
1016 ring, 0);
1017 else
1018 napi_schedule(&ring_data->napi);
1019}
1020
b5996f11 1021static void hns_nic_tx_clr_all_bufs(struct hns_nic_ring_data *ring_data)
1022{
1023 struct hnae_ring *ring = ring_data->ring;
1024 struct net_device *ndev = ring_data->napi.dev;
1025 struct netdev_queue *dev_queue;
1026 int head;
1027 int bytes, pkts;
1028
1029 NETIF_TX_LOCK(ndev);
1030
1031 head = ring->next_to_use; /* ntu :soft setted ring position*/
1032 bytes = 0;
1033 pkts = 0;
1034 while (head != ring->next_to_clean)
1035 hns_nic_reclaim_one_desc(ring, &bytes, &pkts);
1036
1037 NETIF_TX_UNLOCK(ndev);
1038
1039 dev_queue = netdev_get_tx_queue(ndev, ring_data->queue_index);
1040 netdev_tx_reset_queue(dev_queue);
1041}
1042
1043static int hns_nic_common_poll(struct napi_struct *napi, int budget)
1044{
1045 struct hns_nic_ring_data *ring_data =
1046 container_of(napi, struct hns_nic_ring_data, napi);
1047 int clean_complete = ring_data->poll_one(
1048 ring_data, budget, ring_data->ex_process);
1049
1050 if (clean_complete >= 0 && clean_complete < budget) {
1051 napi_complete(napi);
cee5add4 1052 ring_data->fini_process(ring_data);
9cbe9fd5 1053 return 0;
b5996f11 1054 }
1055
1056 return clean_complete;
1057}
1058
1059static irqreturn_t hns_irq_handle(int irq, void *dev)
1060{
1061 struct hns_nic_ring_data *ring_data = (struct hns_nic_ring_data *)dev;
1062
1063 ring_data->ring->q->handle->dev->ops->toggle_ring_irq(
1064 ring_data->ring, 1);
1065 napi_schedule(&ring_data->napi);
1066
1067 return IRQ_HANDLED;
1068}
1069
1070/**
1071 *hns_nic_adjust_link - adjust net work mode by the phy stat or new param
1072 *@ndev: net device
1073 */
1074static void hns_nic_adjust_link(struct net_device *ndev)
1075{
1076 struct hns_nic_priv *priv = netdev_priv(ndev);
1077 struct hnae_handle *h = priv->ae_handle;
bb7189dc
QX		 1078 int state = 1;
1079
262b38cd 1080 if (ndev->phydev) {
bb7189dc
QX		 1081 h->dev->ops->adjust_link(h, ndev->phydev->speed,
1082 ndev->phydev->duplex);
262b38cd 1083 state = ndev->phydev->link;
bb7189dc
QX		 1084 }
1085 state = state && h->dev->ops->get_status(h);
b5996f11 1086
bb7189dc
QX		 1087 if (state != priv->link) {
1088 if (state) {
1089 netif_carrier_on(ndev);
1090 netif_tx_wake_all_queues(ndev);
1091 netdev_info(ndev, "link up\n");
1092 } else {
1093 netif_carrier_off(ndev);
1094 netdev_info(ndev, "link down\n");
1095 }
1096 priv->link = state;
1097 }
b5996f11 1098}
1099
1100/**
1101 *hns_nic_init_phy - init phy
1102 *@ndev: net device
1103 *@h: ae handle
1104 * Return 0 on success, negative on failure
1105 */
1106int hns_nic_init_phy(struct net_device *ndev, struct hnae_handle *h)
1107{
652d39b0
KY		 1108 struct phy_device *phy_dev = h->phy_dev;
1109 int ret;
b5996f11 1110
652d39b0 1111 if (!h->phy_dev)
b5996f11 1112 return 0;
1113
652d39b0
KY		 1114 if (h->phy_if != PHY_INTERFACE_MODE_XGMII) {
1115 phy_dev->dev_flags = 0;
b5996f11 1116
652d39b0
KY		 1117 ret = phy_connect_direct(ndev, phy_dev, hns_nic_adjust_link,
1118 h->phy_if);
1119 } else {
1120 ret = phy_attach_direct(ndev, phy_dev, 0, h->phy_if);
1121 }
1122 if (unlikely(ret))
1123 return -ENODEV;
b5996f11 1124
1125 phy_dev->supported &= h->if_support;
1126 phy_dev->advertising = phy_dev->supported;
1127
1128 if (h->phy_if == PHY_INTERFACE_MODE_XGMII)
1129 phy_dev->autoneg = false;
1130
b5996f11 1131 return 0;
1132}
1133
1134static int hns_nic_ring_open(struct net_device *netdev, int idx)
1135{
1136 struct hns_nic_priv *priv = netdev_priv(netdev);
1137 struct hnae_handle *h = priv->ae_handle;
1138
1139 napi_enable(&priv->ring_data[idx].napi);
1140
1141 enable_irq(priv->ring_data[idx].ring->irq);
1142 h->dev->ops->toggle_ring_irq(priv->ring_data[idx].ring, 0);
1143
1144 return 0;
1145}
1146
1147static int hns_nic_net_set_mac_address(struct net_device *ndev, void *p)
1148{
1149 struct hns_nic_priv *priv = netdev_priv(ndev);
1150 struct hnae_handle *h = priv->ae_handle;
1151 struct sockaddr *mac_addr = p;
1152 int ret;
1153
1154 if (!mac_addr || !is_valid_ether_addr((const u8 *)mac_addr->sa_data))
1155 return -EADDRNOTAVAIL;
1156
1157 ret = h->dev->ops->set_mac_addr(h, mac_addr->sa_data);
1158 if (ret) {
1159 netdev_err(ndev, "set_mac_address fail, ret=%d!\n", ret);
1160 return ret;
1161 }
1162
1163 memcpy(ndev->dev_addr, mac_addr->sa_data, ndev->addr_len);
1164
1165 return 0;
1166}
1167
1168void hns_nic_update_stats(struct net_device *netdev)
1169{
1170 struct hns_nic_priv *priv = netdev_priv(netdev);
1171 struct hnae_handle *h = priv->ae_handle;
1172
1173 h->dev->ops->update_stats(h, &netdev->stats);
1174}
1175
1176/* set mac addr if it is configed. or leave it to the AE driver */
1177static void hns_init_mac_addr(struct net_device *ndev)
1178{
1179 struct hns_nic_priv *priv = netdev_priv(ndev);
b5996f11 1180
6162928c 1181 if (!device_get_mac_address(priv->dev, ndev->dev_addr, ETH_ALEN)) {
b5996f11 1182 eth_hw_addr_random(ndev);
1183 dev_warn(priv->dev, "No valid mac, use random mac %pM",
1184 ndev->dev_addr);
1185 }
1186}
1187
1188static void hns_nic_ring_close(struct net_device *netdev, int idx)
1189{
1190 struct hns_nic_priv *priv = netdev_priv(netdev);
1191 struct hnae_handle *h = priv->ae_handle;
1192
1193 h->dev->ops->toggle_ring_irq(priv->ring_data[idx].ring, 1);
1194 disable_irq(priv->ring_data[idx].ring->irq);
1195
1196 napi_disable(&priv->ring_data[idx].napi);
1197}
1198
13ac695e 1199static void hns_set_irq_affinity(struct hns_nic_priv *priv)
b5996f11 1200{
1201 struct hnae_handle *h = priv->ae_handle;
1202 struct hns_nic_ring_data *rd;
1203 int i;
b5996f11 1204 int cpu;
1205 cpumask_t mask;
1206
13ac695e
S		 1207 /*diffrent irq banlance for 16core and 32core*/
1208 if (h->q_num == num_possible_cpus()) {
1209 for (i = 0; i < h->q_num * 2; i++) {
1210 rd = &priv->ring_data[i];
1211 if (cpu_online(rd->queue_index)) {
1212 cpumask_clear(&mask);
1213 cpu = rd->queue_index;
1214 cpumask_set_cpu(cpu, &mask);
1215 (void)irq_set_affinity_hint(rd->ring->irq,
1216 &mask);
1217 }
1218 }
1219 } else {
1220 for (i = 0; i < h->q_num; i++) {
1221 rd = &priv->ring_data[i];
1222 if (cpu_online(rd->queue_index * 2)) {
1223 cpumask_clear(&mask);
1224 cpu = rd->queue_index * 2;
1225 cpumask_set_cpu(cpu, &mask);
1226 (void)irq_set_affinity_hint(rd->ring->irq,
1227 &mask);
1228 }
1229 }
1230
1231 for (i = h->q_num; i < h->q_num * 2; i++) {
1232 rd = &priv->ring_data[i];
1233 if (cpu_online(rd->queue_index * 2 + 1)) {
1234 cpumask_clear(&mask);
1235 cpu = rd->queue_index * 2 + 1;
1236 cpumask_set_cpu(cpu, &mask);
1237 (void)irq_set_affinity_hint(rd->ring->irq,
1238 &mask);
1239 }
1240 }
1241 }
1242}
1243
1244static int hns_nic_init_irq(struct hns_nic_priv *priv)
1245{
1246 struct hnae_handle *h = priv->ae_handle;
1247 struct hns_nic_ring_data *rd;
1248 int i;
1249 int ret;
1250
b5996f11 1251 for (i = 0; i < h->q_num * 2; i++) {
1252 rd = &priv->ring_data[i];
1253
1254 if (rd->ring->irq_init_flag == RCB_IRQ_INITED)
1255 break;
1256
1257 snprintf(rd->ring->ring_name, RCB_RING_NAME_LEN,
1258 "%s-%s%d", priv->netdev->name,
1259 (i < h->q_num ? "tx" : "rx"), rd->queue_index);
1260
1261 rd->ring->ring_name[RCB_RING_NAME_LEN - 1] = '\0';
1262
1263 ret = request_irq(rd->ring->irq,
1264 hns_irq_handle, 0, rd->ring->ring_name, rd);
1265 if (ret) {
1266 netdev_err(priv->netdev, "request irq(%d) fail\n",
1267 rd->ring->irq);
1268 return ret;
1269 }
1270 disable_irq(rd->ring->irq);
1271 rd->ring->irq_init_flag = RCB_IRQ_INITED;
b5996f11 1272 }
1273
13ac695e
S		 1274 /*set cpu affinity*/
1275 hns_set_irq_affinity(priv);
1276
b5996f11 1277 return 0;
1278}
1279
1280static int hns_nic_net_up(struct net_device *ndev)
1281{
1282 struct hns_nic_priv *priv = netdev_priv(ndev);
1283 struct hnae_handle *h = priv->ae_handle;
454784d8 1284 int i, j;
b5996f11 1285 int ret;
1286
1287 ret = hns_nic_init_irq(priv);
1288 if (ret != 0) {
1289 netdev_err(ndev, "hns init irq failed! ret=%d\n", ret);
1290 return ret;
1291 }
1292
1293 for (i = 0; i < h->q_num * 2; i++) {
1294 ret = hns_nic_ring_open(ndev, i);
1295 if (ret)
1296 goto out_has_some_queues;
1297 }
1298
b5996f11 1299 ret = h->dev->ops->set_mac_addr(h, ndev->dev_addr);
1300 if (ret)
1301 goto out_set_mac_addr_err;
1302
1303 ret = h->dev->ops->start ? h->dev->ops->start(h) : 0;
1304 if (ret)
1305 goto out_start_err;
1306
262b38cd
PR		 1307 if (ndev->phydev)
1308 phy_start(ndev->phydev);
b5996f11 1309
1310 clear_bit(NIC_STATE_DOWN, &priv->state);
1311 (void)mod_timer(&priv->service_timer, jiffies + SERVICE_TIMER_HZ);
1312
1313 return 0;
1314
1315out_start_err:
1316 netif_stop_queue(ndev);
1317out_set_mac_addr_err:
b5996f11 1318out_has_some_queues:
1319 for (j = i - 1; j >= 0; j--)
1320 hns_nic_ring_close(ndev, j);
1321
1322 set_bit(NIC_STATE_DOWN, &priv->state);
1323
1324 return ret;
1325}
1326
1327static void hns_nic_net_down(struct net_device *ndev)
1328{
1329 int i;
1330 struct hnae_ae_ops *ops;
1331 struct hns_nic_priv *priv = netdev_priv(ndev);
1332
1333 if (test_and_set_bit(NIC_STATE_DOWN, &priv->state))
1334 return;
1335
1336 (void)del_timer_sync(&priv->service_timer);
1337 netif_tx_stop_all_queues(ndev);
1338 netif_carrier_off(ndev);
1339 netif_tx_disable(ndev);
1340 priv->link = 0;
1341
262b38cd
PR		 1342 if (ndev->phydev)
1343 phy_stop(ndev->phydev);
b5996f11 1344
1345 ops = priv->ae_handle->dev->ops;
1346
1347 if (ops->stop)
1348 ops->stop(priv->ae_handle);
1349
1350 netif_tx_stop_all_queues(ndev);
1351
1352 for (i = priv->ae_handle->q_num - 1; i >= 0; i--) {
1353 hns_nic_ring_close(ndev, i);
1354 hns_nic_ring_close(ndev, i + priv->ae_handle->q_num);
1355
1356 /* clean tx buffers*/
1357 hns_nic_tx_clr_all_bufs(priv->ring_data + i);
1358 }
1359}
1360
1361void hns_nic_net_reset(struct net_device *ndev)
1362{
1363 struct hns_nic_priv *priv = netdev_priv(ndev);
1364 struct hnae_handle *handle = priv->ae_handle;
1365
1366 while (test_and_set_bit(NIC_STATE_RESETTING, &priv->state))
1367 usleep_range(1000, 2000);
1368
1369 (void)hnae_reinit_handle(handle);
1370
1371 clear_bit(NIC_STATE_RESETTING, &priv->state);
1372}
1373
1374void hns_nic_net_reinit(struct net_device *netdev)
1375{
1376 struct hns_nic_priv *priv = netdev_priv(netdev);
1377
860e9538 1378 netif_trans_update(priv->netdev);
b5996f11 1379 while (test_and_set_bit(NIC_STATE_REINITING, &priv->state))
1380 usleep_range(1000, 2000);
1381
1382 hns_nic_net_down(netdev);
1383 hns_nic_net_reset(netdev);
1384 (void)hns_nic_net_up(netdev);
1385 clear_bit(NIC_STATE_REINITING, &priv->state);
1386}
1387
1388static int hns_nic_net_open(struct net_device *ndev)
1389{
1390 struct hns_nic_priv *priv = netdev_priv(ndev);
1391 struct hnae_handle *h = priv->ae_handle;
1392 int ret;
1393
1394 if (test_bit(NIC_STATE_TESTING, &priv->state))
1395 return -EBUSY;
1396
1397 priv->link = 0;
1398 netif_carrier_off(ndev);
1399
1400 ret = netif_set_real_num_tx_queues(ndev, h->q_num);
1401 if (ret < 0) {
1402 netdev_err(ndev, "netif_set_real_num_tx_queues fail, ret=%d!\n",
1403 ret);
1404 return ret;
1405 }
1406
1407 ret = netif_set_real_num_rx_queues(ndev, h->q_num);
1408 if (ret < 0) {
1409 netdev_err(ndev,
1410 "netif_set_real_num_rx_queues fail, ret=%d!\n", ret);
1411 return ret;
1412 }
1413
1414 ret = hns_nic_net_up(ndev);
1415 if (ret) {
1416 netdev_err(ndev,
1417 "hns net up fail, ret=%d!\n", ret);
1418 return ret;
1419 }
1420
1421 return 0;
1422}
1423
1424static int hns_nic_net_stop(struct net_device *ndev)
1425{
1426 hns_nic_net_down(ndev);
1427
1428 return 0;
1429}
1430
1431static void hns_tx_timeout_reset(struct hns_nic_priv *priv);
1432static void hns_nic_net_timeout(struct net_device *ndev)
1433{
1434 struct hns_nic_priv *priv = netdev_priv(ndev);
1435
1436 hns_tx_timeout_reset(priv);
1437}
1438
1439static int hns_nic_do_ioctl(struct net_device *netdev, struct ifreq *ifr,
1440 int cmd)
1441{
262b38cd 1442 struct phy_device *phy_dev = netdev->phydev;
b5996f11 1443
1444 if (!netif_running(netdev))
1445 return -EINVAL;
1446
1447 if (!phy_dev)
1448 return -ENOTSUPP;
1449
1450 return phy_mii_ioctl(phy_dev, ifr, cmd);
1451}
1452
1453/* use only for netconsole to poll with the device without interrupt */
1454#ifdef CONFIG_NET_POLL_CONTROLLER
1455void hns_nic_poll_controller(struct net_device *ndev)
1456{
1457 struct hns_nic_priv *priv = netdev_priv(ndev);
1458 unsigned long flags;
1459 int i;
1460
1461 local_irq_save(flags);
1462 for (i = 0; i < priv->ae_handle->q_num * 2; i++)
1463 napi_schedule(&priv->ring_data[i].napi);
1464 local_irq_restore(flags);
1465}
1466#endif
1467
1468static netdev_tx_t hns_nic_net_xmit(struct sk_buff *skb,
1469 struct net_device *ndev)
1470{
1471 struct hns_nic_priv *priv = netdev_priv(ndev);
1472 int ret;
1473
1474 assert(skb->queue_mapping < ndev->ae_handle->q_num);
1475 ret = hns_nic_net_xmit_hw(ndev, skb,
1476 &tx_ring_data(priv, skb->queue_mapping));
1477 if (ret == NETDEV_TX_OK) {
860e9538 1478 netif_trans_update(ndev);
b5996f11 1479 ndev->stats.tx_bytes += skb->len;
1480 ndev->stats.tx_packets++;
1481 }
1482 return (netdev_tx_t)ret;
1483}
1484
1485static int hns_nic_change_mtu(struct net_device *ndev, int new_mtu)
1486{
1487 struct hns_nic_priv *priv = netdev_priv(ndev);
1488 struct hnae_handle *h = priv->ae_handle;
1489 int ret;
1490
b5996f11 1491 if (!h->dev->ops->set_mtu)
1492 return -ENOTSUPP;
1493
1494 if (netif_running(ndev)) {
1495 (void)hns_nic_net_stop(ndev);
1496 msleep(100);
1497
1498 ret = h->dev->ops->set_mtu(h, new_mtu);
1499 if (ret)
1500 netdev_err(ndev, "set mtu fail, return value %d\n",
1501 ret);
1502
1503 if (hns_nic_net_open(ndev))
1504 netdev_err(ndev, "hns net open fail\n");
1505 } else {
1506 ret = h->dev->ops->set_mtu(h, new_mtu);
1507 }
1508
1509 if (!ret)
1510 ndev->mtu = new_mtu;
1511
1512 return ret;
1513}
1514
38f616da
S		 1515static int hns_nic_set_features(struct net_device *netdev,
1516 netdev_features_t features)
1517{
1518 struct hns_nic_priv *priv = netdev_priv(netdev);
38f616da
S		 1519
1520 switch (priv->enet_ver) {
1521 case AE_VERSION_1:
1522 if (features & (NETIF_F_TSO | NETIF_F_TSO6))
1523 netdev_info(netdev, "enet v1 do not support tso!\n");
1524 break;
1525 default:
1526 if (features & (NETIF_F_TSO | NETIF_F_TSO6)) {
1527 priv->ops.fill_desc = fill_tso_desc;
1528 priv->ops.maybe_stop_tx = hns_nic_maybe_stop_tso;
1529 /* The chip only support 7*4096 */
1530 netif_set_gso_max_size(netdev, 7 * 4096);
38f616da
S		 1531 } else {
1532 priv->ops.fill_desc = fill_v2_desc;
1533 priv->ops.maybe_stop_tx = hns_nic_maybe_stop_tx;
38f616da
S		 1534 }
1535 break;
1536 }
1537 netdev->features = features;
1538 return 0;
1539}
1540
1541static netdev_features_t hns_nic_fix_features(
1542 struct net_device *netdev, netdev_features_t features)
1543{
1544 struct hns_nic_priv *priv = netdev_priv(netdev);
1545
1546 switch (priv->enet_ver) {
1547 case AE_VERSION_1:
1548 features &= ~(NETIF_F_TSO | NETIF_F_TSO6 |
1549 NETIF_F_HW_VLAN_CTAG_FILTER);
1550 break;
1551 default:
1552 break;
1553 }
1554 return features;
1555}
1556
66355f52
KY		 1557static int hns_nic_uc_sync(struct net_device *netdev, const unsigned char *addr)
1558{
1559 struct hns_nic_priv *priv = netdev_priv(netdev);
1560 struct hnae_handle *h = priv->ae_handle;
1561
1562 if (h->dev->ops->add_uc_addr)
1563 return h->dev->ops->add_uc_addr(h, addr);
1564
1565 return 0;
1566}
1567
1568static int hns_nic_uc_unsync(struct net_device *netdev,
1569 const unsigned char *addr)
1570{
1571 struct hns_nic_priv *priv = netdev_priv(netdev);
1572 struct hnae_handle *h = priv->ae_handle;
1573
1574 if (h->dev->ops->rm_uc_addr)
1575 return h->dev->ops->rm_uc_addr(h, addr);
1576
1577 return 0;
1578}
1579
b5996f11 1580/**
1581 * nic_set_multicast_list - set mutl mac address
1582 * @netdev: net device
1583 * @p: mac address
1584 *
1585 * return void
1586 */
1587void hns_set_multicast_list(struct net_device *ndev)
1588{
1589 struct hns_nic_priv *priv = netdev_priv(ndev);
1590 struct hnae_handle *h = priv->ae_handle;
1591 struct netdev_hw_addr *ha = NULL;
1592
1593 if (!h) {
1594 netdev_err(ndev, "hnae handle is null\n");
1595 return;
1596 }
1597
ec2cafe6
KY		 1598 if (h->dev->ops->clr_mc_addr)
1599 if (h->dev->ops->clr_mc_addr(h))
1600 netdev_err(ndev, "clear multicast address fail\n");
1601
b5996f11 1602 if (h->dev->ops->set_mc_addr) {
1603 netdev_for_each_mc_addr(ha, ndev)
1604 if (h->dev->ops->set_mc_addr(h, ha->addr))
1605 netdev_err(ndev, "set multicast fail\n");
1606 }
1607}
1608
4568637f 1609void hns_nic_set_rx_mode(struct net_device *ndev)
1610{
1611 struct hns_nic_priv *priv = netdev_priv(ndev);
1612 struct hnae_handle *h = priv->ae_handle;
1613
1614 if (h->dev->ops->set_promisc_mode) {
1615 if (ndev->flags & IFF_PROMISC)
1616 h->dev->ops->set_promisc_mode(h, 1);
1617 else
1618 h->dev->ops->set_promisc_mode(h, 0);
1619 }
1620
1621 hns_set_multicast_list(ndev);
66355f52
KY		 1622
1623 if (__dev_uc_sync(ndev, hns_nic_uc_sync, hns_nic_uc_unsync))
1624 netdev_err(ndev, "sync uc address fail\n");
4568637f 1625}
1626
bc1f4470 1627static void hns_nic_get_stats64(struct net_device *ndev,
1628 struct rtnl_link_stats64 *stats)
b5996f11 1629{
1630 int idx = 0;
1631 u64 tx_bytes = 0;
1632 u64 rx_bytes = 0;
1633 u64 tx_pkts = 0;
1634 u64 rx_pkts = 0;
1635 struct hns_nic_priv *priv = netdev_priv(ndev);
1636 struct hnae_handle *h = priv->ae_handle;
1637
1638 for (idx = 0; idx < h->q_num; idx++) {
1639 tx_bytes += h->qs[idx]->tx_ring.stats.tx_bytes;
1640 tx_pkts += h->qs[idx]->tx_ring.stats.tx_pkts;
1641 rx_bytes += h->qs[idx]->rx_ring.stats.rx_bytes;
1642 rx_pkts += h->qs[idx]->rx_ring.stats.rx_pkts;
1643 }
1644
1645 stats->tx_bytes = tx_bytes;
1646 stats->tx_packets = tx_pkts;
1647 stats->rx_bytes = rx_bytes;
1648 stats->rx_packets = rx_pkts;
1649
1650 stats->rx_errors = ndev->stats.rx_errors;
1651 stats->multicast = ndev->stats.multicast;
1652 stats->rx_length_errors = ndev->stats.rx_length_errors;
1653 stats->rx_crc_errors = ndev->stats.rx_crc_errors;
1654 stats->rx_missed_errors = ndev->stats.rx_missed_errors;
1655
1656 stats->tx_errors = ndev->stats.tx_errors;
1657 stats->rx_dropped = ndev->stats.rx_dropped;
1658 stats->tx_dropped = ndev->stats.tx_dropped;
1659 stats->collisions = ndev->stats.collisions;
1660 stats->rx_over_errors = ndev->stats.rx_over_errors;
1661 stats->rx_frame_errors = ndev->stats.rx_frame_errors;
1662 stats->rx_fifo_errors = ndev->stats.rx_fifo_errors;
1663 stats->tx_aborted_errors = ndev->stats.tx_aborted_errors;
1664 stats->tx_carrier_errors = ndev->stats.tx_carrier_errors;
1665 stats->tx_fifo_errors = ndev->stats.tx_fifo_errors;
1666 stats->tx_heartbeat_errors = ndev->stats.tx_heartbeat_errors;
1667 stats->tx_window_errors = ndev->stats.tx_window_errors;
1668 stats->rx_compressed = ndev->stats.rx_compressed;
1669 stats->tx_compressed = ndev->stats.tx_compressed;
b5996f11 1670}
1671
2162a4a1
DH		 1672static u16
1673hns_nic_select_queue(struct net_device *ndev, struct sk_buff *skb,
1674 void *accel_priv, select_queue_fallback_t fallback)
1675{
1676 struct ethhdr *eth_hdr = (struct ethhdr *)skb->data;
1677 struct hns_nic_priv *priv = netdev_priv(ndev);
1678
1679 /* fix hardware broadcast/multicast packets queue loopback */
1680 if (!AE_IS_VER1(priv->enet_ver) &&
1681 is_multicast_ether_addr(eth_hdr->h_dest))
1682 return 0;
1683 else
1684 return fallback(ndev, skb);
1685}
1686
b5996f11 1687static const struct net_device_ops hns_nic_netdev_ops = {
1688 .ndo_open = hns_nic_net_open,
1689 .ndo_stop = hns_nic_net_stop,
1690 .ndo_start_xmit = hns_nic_net_xmit,
1691 .ndo_tx_timeout = hns_nic_net_timeout,
1692 .ndo_set_mac_address = hns_nic_net_set_mac_address,
1693 .ndo_change_mtu = hns_nic_change_mtu,
1694 .ndo_do_ioctl = hns_nic_do_ioctl,
38f616da
S		 1695 .ndo_set_features = hns_nic_set_features,
1696 .ndo_fix_features = hns_nic_fix_features,
b5996f11 1697 .ndo_get_stats64 = hns_nic_get_stats64,
1698#ifdef CONFIG_NET_POLL_CONTROLLER
1699 .ndo_poll_controller = hns_nic_poll_controller,
1700#endif
4568637f 1701 .ndo_set_rx_mode = hns_nic_set_rx_mode,
2162a4a1 1702 .ndo_select_queue = hns_nic_select_queue,
b5996f11 1703};
1704
1705static void hns_nic_update_link_status(struct net_device *netdev)
1706{
1707 struct hns_nic_priv *priv = netdev_priv(netdev);
1708
1709 struct hnae_handle *h = priv->ae_handle;
b5996f11 1710
bb7189dc
QX		 1711 if (h->phy_dev) {
1712 if (h->phy_if != PHY_INTERFACE_MODE_XGMII)
1713 return;
b5996f11 1714
bb7189dc 1715 (void)genphy_read_status(h->phy_dev);
b5996f11 1716 }
bb7189dc 1717 hns_nic_adjust_link(netdev);
b5996f11 1718}
1719
1720/* for dumping key regs*/
1721static void hns_nic_dump(struct hns_nic_priv *priv)
1722{
1723 struct hnae_handle *h = priv->ae_handle;
1724 struct hnae_ae_ops *ops = h->dev->ops;
1725 u32 *data, reg_num, i;
1726
1727 if (ops->get_regs_len && ops->get_regs) {
1728 reg_num = ops->get_regs_len(priv->ae_handle);
1729 reg_num = (reg_num + 3ul) & ~3ul;
1730 data = kcalloc(reg_num, sizeof(u32), GFP_KERNEL);
1731 if (data) {
1732 ops->get_regs(priv->ae_handle, data);
1733 for (i = 0; i < reg_num; i += 4)
1734 pr_info("0x%08x: 0x%08x 0x%08x 0x%08x 0x%08x\n",
1735 i, data[i], data[i + 1],
1736 data[i + 2], data[i + 3]);
1737 kfree(data);
1738 }
1739 }
1740
1741 for (i = 0; i < h->q_num; i++) {
1742 pr_info("tx_queue%d_next_to_clean:%d\n",
1743 i, h->qs[i]->tx_ring.next_to_clean);
1744 pr_info("tx_queue%d_next_to_use:%d\n",
1745 i, h->qs[i]->tx_ring.next_to_use);
1746 pr_info("rx_queue%d_next_to_clean:%d\n",
1747 i, h->qs[i]->rx_ring.next_to_clean);
1748 pr_info("rx_queue%d_next_to_use:%d\n",
1749 i, h->qs[i]->rx_ring.next_to_use);
1750 }
1751}
1752
f7211729 1753/* for resetting subtask */
b5996f11 1754static void hns_nic_reset_subtask(struct hns_nic_priv *priv)
1755{
1756 enum hnae_port_type type = priv->ae_handle->port_type;
1757
1758 if (!test_bit(NIC_STATE2_RESET_REQUESTED, &priv->state))
1759 return;
1760 clear_bit(NIC_STATE2_RESET_REQUESTED, &priv->state);
1761
1762 /* If we're already down, removing or resetting, just bail */
1763 if (test_bit(NIC_STATE_DOWN, &priv->state) ||
1764 test_bit(NIC_STATE_REMOVING, &priv->state) ||
1765 test_bit(NIC_STATE_RESETTING, &priv->state))
1766 return;
1767
1768 hns_nic_dump(priv);
13ac695e
S		 1769 netdev_info(priv->netdev, "try to reset %s port!\n",
1770 (type == HNAE_PORT_DEBUG ? "debug" : "service"));
b5996f11 1771
1772 rtnl_lock();
90a505b9 1773 /* put off any impending NetWatchDogTimeout */
860e9538 1774 netif_trans_update(priv->netdev);
90a505b9 1775
13ac695e 1776 if (type == HNAE_PORT_DEBUG) {
b5996f11 1777 hns_nic_net_reinit(priv->netdev);
13ac695e
S		 1778 } else {
1779 netif_carrier_off(priv->netdev);
1780 netif_tx_disable(priv->netdev);
1781 }
b5996f11 1782 rtnl_unlock();
1783}
1784
1785/* for doing service complete*/
1786static void hns_nic_service_event_complete(struct hns_nic_priv *priv)
1787{
13ac695e 1788 WARN_ON(!test_bit(NIC_STATE_SERVICE_SCHED, &priv->state));
b5996f11 1789
1790 smp_mb__before_atomic();
1791 clear_bit(NIC_STATE_SERVICE_SCHED, &priv->state);
1792}
1793
1794static void hns_nic_service_task(struct work_struct *work)
1795{
1796 struct hns_nic_priv *priv
1797 = container_of(work, struct hns_nic_priv, service_task);
1798 struct hnae_handle *h = priv->ae_handle;
1799
1800 hns_nic_update_link_status(priv->netdev);
1801 h->dev->ops->update_led_status(h);
1802 hns_nic_update_stats(priv->netdev);
1803
1804 hns_nic_reset_subtask(priv);
1805 hns_nic_service_event_complete(priv);
1806}
1807
1808static void hns_nic_task_schedule(struct hns_nic_priv *priv)
1809{
1810 if (!test_bit(NIC_STATE_DOWN, &priv->state) &&
1811 !test_bit(NIC_STATE_REMOVING, &priv->state) &&
1812 !test_and_set_bit(NIC_STATE_SERVICE_SCHED, &priv->state))
1813 (void)schedule_work(&priv->service_task);
1814}
1815
1816static void hns_nic_service_timer(unsigned long data)
1817{
1818 struct hns_nic_priv *priv = (struct hns_nic_priv *)data;
1819
1820 (void)mod_timer(&priv->service_timer, jiffies + SERVICE_TIMER_HZ);
1821
1822 hns_nic_task_schedule(priv);
1823}
1824
1825/**
1826 * hns_tx_timeout_reset - initiate reset due to Tx timeout
1827 * @priv: driver private struct
1828 **/
1829static void hns_tx_timeout_reset(struct hns_nic_priv *priv)
1830{
1831 /* Do the reset outside of interrupt context */
1832 if (!test_bit(NIC_STATE_DOWN, &priv->state)) {
1833 set_bit(NIC_STATE2_RESET_REQUESTED, &priv->state);
1834 netdev_warn(priv->netdev,
1835 "initiating reset due to tx timeout(%llu,0x%lx)\n",
1836 priv->tx_timeout_count, priv->state);
1837 priv->tx_timeout_count++;
1838 hns_nic_task_schedule(priv);
1839 }
1840}
1841
1842static int hns_nic_init_ring_data(struct hns_nic_priv *priv)
1843{
1844 struct hnae_handle *h = priv->ae_handle;
1845 struct hns_nic_ring_data *rd;
4b34aa41 1846 bool is_ver1 = AE_IS_VER1(priv->enet_ver);
b5996f11 1847 int i;
1848
1849 if (h->q_num > NIC_MAX_Q_PER_VF) {
1850 netdev_err(priv->netdev, "too much queue (%d)\n", h->q_num);
1851 return -EINVAL;
1852 }
1853
1854 priv->ring_data = kzalloc(h->q_num * sizeof(*priv->ring_data) * 2,
1855 GFP_KERNEL);
1856 if (!priv->ring_data)
1857 return -ENOMEM;
1858
1859 for (i = 0; i < h->q_num; i++) {
1860 rd = &priv->ring_data[i];
1861 rd->queue_index = i;
1862 rd->ring = &h->qs[i]->tx_ring;
1863 rd->poll_one = hns_nic_tx_poll_one;
cee5add4
DH		 1864 rd->fini_process = is_ver1 ? hns_nic_tx_fini_pro :
1865 hns_nic_tx_fini_pro_v2;
b5996f11 1866
1867 netif_napi_add(priv->netdev, &rd->napi,
1868 hns_nic_common_poll, NIC_TX_CLEAN_MAX_NUM);
1869 rd->ring->irq_init_flag = RCB_IRQ_NOT_INITED;
1870 }
1871 for (i = h->q_num; i < h->q_num * 2; i++) {
1872 rd = &priv->ring_data[i];
1873 rd->queue_index = i - h->q_num;
1874 rd->ring = &h->qs[i - h->q_num]->rx_ring;
1875 rd->poll_one = hns_nic_rx_poll_one;
1876 rd->ex_process = hns_nic_rx_up_pro;
cee5add4
DH		 1877 rd->fini_process = is_ver1 ? hns_nic_rx_fini_pro :
1878 hns_nic_rx_fini_pro_v2;
b5996f11 1879
1880 netif_napi_add(priv->netdev, &rd->napi,
1881 hns_nic_common_poll, NIC_RX_CLEAN_MAX_NUM);
1882 rd->ring->irq_init_flag = RCB_IRQ_NOT_INITED;
1883 }
1884
1885 return 0;
1886}
1887
1888static void hns_nic_uninit_ring_data(struct hns_nic_priv *priv)
1889{
1890 struct hnae_handle *h = priv->ae_handle;
1891 int i;
1892
1893 for (i = 0; i < h->q_num * 2; i++) {
1894 netif_napi_del(&priv->ring_data[i].napi);
1895 if (priv->ring_data[i].ring->irq_init_flag == RCB_IRQ_INITED) {
13ac695e
S		 1896 (void)irq_set_affinity_hint(
1897 priv->ring_data[i].ring->irq,
1898 NULL);
b5996f11 1899 free_irq(priv->ring_data[i].ring->irq,
1900 &priv->ring_data[i]);
1901 }
1902
1903 priv->ring_data[i].ring->irq_init_flag = RCB_IRQ_NOT_INITED;
1904 }
1905 kfree(priv->ring_data);
1906}
1907
13ac695e
S		 1908static void hns_nic_set_priv_ops(struct net_device *netdev)
1909{
1910 struct hns_nic_priv *priv = netdev_priv(netdev);
64353af6 1911 struct hnae_handle *h = priv->ae_handle;
13ac695e
S		 1912
1913 if (AE_IS_VER1(priv->enet_ver)) {
1914 priv->ops.fill_desc = fill_desc;
1915 priv->ops.get_rxd_bnum = get_rx_desc_bnum;
1916 priv->ops.maybe_stop_tx = hns_nic_maybe_stop_tx;
1917 } else {
1918 priv->ops.get_rxd_bnum = get_v2rx_desc_bnum;
64353af6
S		 1919 if ((netdev->features & NETIF_F_TSO) ||
1920 (netdev->features & NETIF_F_TSO6)) {
1921 priv->ops.fill_desc = fill_tso_desc;
1922 priv->ops.maybe_stop_tx = hns_nic_maybe_stop_tso;
1923 /* This chip only support 7*4096 */
1924 netif_set_gso_max_size(netdev, 7 * 4096);
64353af6
S		 1925 } else {
1926 priv->ops.fill_desc = fill_v2_desc;
1927 priv->ops.maybe_stop_tx = hns_nic_maybe_stop_tx;
1928 }
6fe27464
DH		 1929 /* enable tso when init
1930 * control tso on/off through TSE bit in bd
1931 */
1932 h->dev->ops->set_tso_stats(h, 1);
13ac695e
S		 1933 }
1934}
1935
b5996f11 1936static int hns_nic_try_get_ae(struct net_device *ndev)
1937{
1938 struct hns_nic_priv *priv = netdev_priv(ndev);
1939 struct hnae_handle *h;
1940 int ret;
1941
1942 h = hnae_get_handle(&priv->netdev->dev,
7b2acae6 1943 priv->fwnode, priv->port_id, NULL);
b5996f11 1944 if (IS_ERR_OR_NULL(h)) {
daa8cfd9 1945 ret = -ENODEV;
b5996f11 1946 dev_dbg(priv->dev, "has not handle, register notifier!\n");
1947 goto out;
1948 }
1949 priv->ae_handle = h;
1950
1951 ret = hns_nic_init_phy(ndev, h);
1952 if (ret) {
1953 dev_err(priv->dev, "probe phy device fail!\n");
1954 goto out_init_phy;
1955 }
1956
1957 ret = hns_nic_init_ring_data(priv);
1958 if (ret) {
1959 ret = -ENOMEM;
1960 goto out_init_ring_data;
1961 }
1962
13ac695e
S		 1963 hns_nic_set_priv_ops(ndev);
1964
b5996f11 1965 ret = register_netdev(ndev);
1966 if (ret) {
1967 dev_err(priv->dev, "probe register netdev fail!\n");
1968 goto out_reg_ndev_fail;
1969 }
1970 return 0;
1971
1972out_reg_ndev_fail:
1973 hns_nic_uninit_ring_data(priv);
1974 priv->ring_data = NULL;
1975out_init_phy:
1976out_init_ring_data:
1977 hnae_put_handle(priv->ae_handle);
1978 priv->ae_handle = NULL;
1979out:
1980 return ret;
1981}
1982
1983static int hns_nic_notifier_action(struct notifier_block *nb,
1984 unsigned long action, void *data)
1985{
1986 struct hns_nic_priv *priv =
1987 container_of(nb, struct hns_nic_priv, notifier_block);
1988
1989 assert(action == HNAE_AE_REGISTER);
1990
1991 if (!hns_nic_try_get_ae(priv->netdev)) {
1992 hnae_unregister_notifier(&priv->notifier_block);
1993 priv->notifier_block.notifier_call = NULL;
1994 }
1995 return 0;
1996}
1997
1998static int hns_nic_dev_probe(struct platform_device *pdev)
1999{
2000 struct device *dev = &pdev->dev;
2001 struct net_device *ndev;
2002 struct hns_nic_priv *priv;
406adee9 2003 u32 port_id;
b5996f11 2004 int ret;
2005
2006 ndev = alloc_etherdev_mq(sizeof(struct hns_nic_priv), NIC_MAX_Q_PER_VF);
2007 if (!ndev)
2008 return -ENOMEM;
2009
2010 platform_set_drvdata(pdev, ndev);
2011
2012 priv = netdev_priv(ndev);
2013 priv->dev = dev;
2014 priv->netdev = ndev;
2015
63434888
KY		 2016 if (dev_of_node(dev)) {
2017 struct device_node *ae_node;
b5996f11 2018
63434888
KY		 2019 if (of_device_is_compatible(dev->of_node,
2020 "hisilicon,hns-nic-v1"))
2021 priv->enet_ver = AE_VERSION_1;
2022 else
2023 priv->enet_ver = AE_VERSION_2;
2024
2025 ae_node = of_parse_phandle(dev->of_node, "ae-handle", 0);
2026 if (IS_ERR_OR_NULL(ae_node)) {
2027 ret = PTR_ERR(ae_node);
2028 dev_err(dev, "not find ae-handle\n");
2029 goto out_read_prop_fail;
2030 }
2031 priv->fwnode = &ae_node->fwnode;
2032 } else if (is_acpi_node(dev->fwnode)) {
2033 struct acpi_reference_args args;
2034
2035 if (acpi_dev_found(hns_enet_acpi_match[0].id))
2036 priv->enet_ver = AE_VERSION_1;
2037 else if (acpi_dev_found(hns_enet_acpi_match[1].id))
2038 priv->enet_ver = AE_VERSION_2;
2039 else
2040 return -ENXIO;
2041
2042 /* try to find port-idx-in-ae first */
2043 ret = acpi_node_get_property_reference(dev->fwnode,
2044 "ae-handle", 0, &args);
2045 if (ret) {
2046 dev_err(dev, "not find ae-handle\n");
2047 goto out_read_prop_fail;
2048 }
2049 priv->fwnode = acpi_fwnode_handle(args.adev);
2050 } else {
2051 dev_err(dev, "cannot read cfg data from OF or acpi\n");
2052 return -ENXIO;
48189d6a 2053 }
7b2acae6 2054
6162928c 2055 ret = device_property_read_u32(dev, "port-idx-in-ae", &port_id);
406adee9
YZZ		 2056 if (ret) {
2057 /* only for old code compatible */
6162928c 2058 ret = device_property_read_u32(dev, "port-id", &port_id);
406adee9
YZZ		 2059 if (ret)
2060 goto out_read_prop_fail;
2061 /* for old dts, we need to caculate the port offset */
2062 port_id = port_id < HNS_SRV_OFFSET ? port_id + HNS_DEBUG_OFFSET
2063 : port_id - HNS_SRV_OFFSET;
2064 }
2065 priv->port_id = port_id;
b5996f11 2066
2067 hns_init_mac_addr(ndev);
2068
2069 ndev->watchdog_timeo = HNS_NIC_TX_TIMEOUT;
2070 ndev->priv_flags |= IFF_UNICAST_FLT;
2071 ndev->netdev_ops = &hns_nic_netdev_ops;
2072 hns_ethtool_set_ops(ndev);
13ac695e 2073
b5996f11 2074 ndev->features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
2075 NETIF_F_RXCSUM | NETIF_F_SG | NETIF_F_GSO |
2076 NETIF_F_GRO;
2077 ndev->vlan_features |=
2078 NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM | NETIF_F_RXCSUM;
2079 ndev->vlan_features |= NETIF_F_SG | NETIF_F_GSO | NETIF_F_GRO;
2080
44770e11
JW		 2081 /* MTU range: 68 - 9578 (v1) or 9706 (v2) */
2082 ndev->min_mtu = MAC_MIN_MTU;
13ac695e
S		 2083 switch (priv->enet_ver) {
2084 case AE_VERSION_2:
64353af6 2085 ndev->features |= NETIF_F_TSO | NETIF_F_TSO6;
13ac695e
S		 2086 ndev->hw_features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
2087 NETIF_F_RXCSUM | NETIF_F_SG | NETIF_F_GSO |
64353af6 2088 NETIF_F_GRO | NETIF_F_TSO | NETIF_F_TSO6;
44770e11
JW		 2089 ndev->max_mtu = MAC_MAX_MTU_V2 -
2090 (ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN);
13ac695e
S		 2091 break;
2092 default:
44770e11
JW		 2093 ndev->max_mtu = MAC_MAX_MTU -
2094 (ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN);
13ac695e
S		 2095 break;
2096 }
2097
b5996f11 2098 SET_NETDEV_DEV(ndev, dev);
2099
2100 if (!dma_set_mask_and_coherent(dev, DMA_BIT_MASK(64)))
2101 dev_dbg(dev, "set mask to 64bit\n");
2102 else
39c94417 2103 dev_err(dev, "set mask to 64bit fail!\n");
b5996f11 2104
2105 /* carrier off reporting is important to ethtool even BEFORE open */
2106 netif_carrier_off(ndev);
2107
2108 setup_timer(&priv->service_timer, hns_nic_service_timer,
2109 (unsigned long)priv);
2110 INIT_WORK(&priv->service_task, hns_nic_service_task);
2111
2112 set_bit(NIC_STATE_SERVICE_INITED, &priv->state);
2113 clear_bit(NIC_STATE_SERVICE_SCHED, &priv->state);
2114 set_bit(NIC_STATE_DOWN, &priv->state);
2115
2116 if (hns_nic_try_get_ae(priv->netdev)) {
2117 priv->notifier_block.notifier_call = hns_nic_notifier_action;
2118 ret = hnae_register_notifier(&priv->notifier_block);
2119 if (ret) {
2120 dev_err(dev, "register notifier fail!\n");
2121 goto out_notify_fail;
2122 }
2123 dev_dbg(dev, "has not handle, register notifier!\n");
2124 }
2125
2126 return 0;
2127
2128out_notify_fail:
2129 (void)cancel_work_sync(&priv->service_task);
48189d6a 2130out_read_prop_fail:
b5996f11 2131 free_netdev(ndev);
2132 return ret;
2133}
2134
2135static int hns_nic_dev_remove(struct platform_device *pdev)
2136{
2137 struct net_device *ndev = platform_get_drvdata(pdev);
2138 struct hns_nic_priv *priv = netdev_priv(ndev);
2139
2140 if (ndev->reg_state != NETREG_UNINITIALIZED)
2141 unregister_netdev(ndev);
2142
2143 if (priv->ring_data)
2144 hns_nic_uninit_ring_data(priv);
2145 priv->ring_data = NULL;
2146
262b38cd
PR		 2147 if (ndev->phydev)
2148 phy_disconnect(ndev->phydev);
b5996f11 2149
2150 if (!IS_ERR_OR_NULL(priv->ae_handle))
2151 hnae_put_handle(priv->ae_handle);
2152 priv->ae_handle = NULL;
2153 if (priv->notifier_block.notifier_call)
2154 hnae_unregister_notifier(&priv->notifier_block);
2155 priv->notifier_block.notifier_call = NULL;
2156
2157 set_bit(NIC_STATE_REMOVING, &priv->state);
2158 (void)cancel_work_sync(&priv->service_task);
2159
2160 free_netdev(ndev);
2161 return 0;
2162}
2163
2164static const struct of_device_id hns_enet_of_match[] = {
2165 {.compatible = "hisilicon,hns-nic-v1",},
2166 {.compatible = "hisilicon,hns-nic-v2",},
2167 {},
2168};
2169
2170MODULE_DEVICE_TABLE(of, hns_enet_of_match);
2171
2172static struct platform_driver hns_nic_dev_driver = {
2173 .driver = {
2174 .name = "hns-nic",
b5996f11 2175 .of_match_table = hns_enet_of_match,
63434888 2176 .acpi_match_table = ACPI_PTR(hns_enet_acpi_match),
b5996f11 2177 },
2178 .probe = hns_nic_dev_probe,
2179 .remove = hns_nic_dev_remove,
2180};
2181
2182module_platform_driver(hns_nic_dev_driver);
2183
2184MODULE_DESCRIPTION("HISILICON HNS Ethernet driver");
2185MODULE_AUTHOR("Hisilicon, Inc.");
2186MODULE_LICENSE("GPL");
2187MODULE_ALIAS("platform:hns-nic");
Linux 6.x block layer and io_uring tree(s)