1	// SPDX-License-Identifier: GPL-2.0-or-later
2	/*
3	* Copyright (c) 2014-2015 Hisilicon Limited.
4	*/
5
6	#include <linux/clk.h>
7	#include <linux/cpumask.h>
8	#include <linux/etherdevice.h>
9	#include <linux/if_vlan.h>
10	#include <linux/interrupt.h>
11	#include <linux/io.h>
12	#include <linux/ip.h>
13	#include <linux/ipv6.h>
14	#include <linux/irq.h>
15	#include <linux/module.h>
16	#include <linux/phy.h>
17	#include <linux/platform_device.h>
18	#include <linux/skbuff.h>
19
20	#include "hnae.h"
21	#include "hns_enet.h"
22	#include "hns_dsaf_mac.h"
23
24	#define NIC_MAX_Q_PER_VF 16
25	#define HNS_NIC_TX_TIMEOUT (5 * HZ)
26
27	#define SERVICE_TIMER_HZ (1 * HZ)
28
29	#define RCB_IRQ_NOT_INITED 0
30	#define RCB_IRQ_INITED 1
31	#define HNS_BUFFER_SIZE_2048 2048
32
33	#define BD_MAX_SEND_SIZE 8191
34
35	static void fill_v2_desc_hw(struct hnae_ring *ring, void *priv, int size,
36	int send_sz, dma_addr_t dma, int frag_end,
37	int buf_num, enum hns_desc_type type, int mtu)
38	{
39	struct hnae_desc *desc = &ring->desc[ring->next_to_use];
40	struct hnae_desc_cb *desc_cb = &ring->desc_cb[ring->next_to_use];
41	struct iphdr *iphdr;
42	struct ipv6hdr *ipv6hdr;
43	struct sk_buff *skb;
44	__be16 protocol;
45	u8 bn_pid = 0;
46	u8 rrcfv = 0;
47	u8 ip_offset = 0;
48	u8 tvsvsn = 0;
49	u16 mss = 0;
50	u8 l4_len = 0;
51	u16 paylen = 0;
52
53	desc_cb->priv = priv;
54	desc_cb->length = size;
55	desc_cb->dma = dma;
56	desc_cb->type = type;
57
58	desc->addr = cpu_to_le64(dma);
59	desc->tx.send_size = cpu_to_le16((u16)send_sz);
60
61	/* config bd buffer end */
62	hnae_set_bit(rrcfv, HNSV2_TXD_VLD_B, 1);
63	hnae_set_field(bn_pid, HNSV2_TXD_BUFNUM_M, 0, buf_num - 1);
64
65	/* fill port_id in the tx bd for sending management pkts */
66	hnae_set_field(bn_pid, HNSV2_TXD_PORTID_M,
67	HNSV2_TXD_PORTID_S, ring->q->handle->dport_id);
68
69	if (type == DESC_TYPE_SKB) {
70	skb = (struct sk_buff *)priv;
71
72	if (skb->ip_summed == CHECKSUM_PARTIAL) {
73	skb_reset_mac_len(skb);
74	protocol = skb->protocol;
75	ip_offset = ETH_HLEN;
76
77	if (protocol == htons(ETH_P_8021Q)) {
78	ip_offset += VLAN_HLEN;
79	protocol = vlan_get_protocol(skb);
80	skb->protocol = protocol;
81	}
82
83	if (skb->protocol == htons(ETH_P_IP)) {
84	iphdr = ip_hdr(skb);
85	hnae_set_bit(rrcfv, HNSV2_TXD_L3CS_B, 1);
86	hnae_set_bit(rrcfv, HNSV2_TXD_L4CS_B, 1);
87
88	/* check for tcp/udp header */
89	if (iphdr->protocol == IPPROTO_TCP &&
90	skb_is_gso(skb)) {
91	hnae_set_bit(tvsvsn,
92	HNSV2_TXD_TSE_B, 1);
93	l4_len = tcp_hdrlen(skb);
94	mss = skb_shinfo(skb)->gso_size;
95	paylen = skb->len - skb_tcp_all_headers(skb);
96	}
97	} else if (skb->protocol == htons(ETH_P_IPV6)) {
98	hnae_set_bit(tvsvsn, HNSV2_TXD_IPV6_B, 1);
99	ipv6hdr = ipv6_hdr(skb);
100	hnae_set_bit(rrcfv, HNSV2_TXD_L4CS_B, 1);
101
102	/* check for tcp/udp header */
103	if (ipv6hdr->nexthdr == IPPROTO_TCP &&
104	skb_is_gso(skb) && skb_is_gso_v6(skb)) {
105	hnae_set_bit(tvsvsn,
106	HNSV2_TXD_TSE_B, 1);
107	l4_len = tcp_hdrlen(skb);
108	mss = skb_shinfo(skb)->gso_size;
109	paylen = skb->len - skb_tcp_all_headers(skb);
110	}
111	}
112	desc->tx.ip_offset = ip_offset;
113	desc->tx.tse_vlan_snap_v6_sctp_nth = tvsvsn;
114	desc->tx.mss = cpu_to_le16(mss);
115	desc->tx.l4_len = l4_len;
116	desc->tx.paylen = cpu_to_le16(paylen);
117	}
118	}
119
120	hnae_set_bit(rrcfv, HNSV2_TXD_FE_B, frag_end);
121
122	desc->tx.bn_pid = bn_pid;
123	desc->tx.ra_ri_cs_fe_vld = rrcfv;
124
125	ring_ptr_move_fw(ring, next_to_use);
126	}
127
128	static void fill_v2_desc(struct hnae_ring *ring, void *priv,
129	int size, dma_addr_t dma, int frag_end,
130	int buf_num, enum hns_desc_type type, int mtu)
131	{
132	fill_v2_desc_hw(ring, priv, size, send_sz: size, dma, frag_end,
133	buf_num, type, mtu);
134	}
135
136	static const struct acpi_device_id hns_enet_acpi_match[] = {
137	{ "HISI00C1", 0 },
138	{ "HISI00C2", 0 },
139	{ },
140	};
141	MODULE_DEVICE_TABLE(acpi, hns_enet_acpi_match);
142
143	static void fill_desc(struct hnae_ring *ring, void *priv,
144	int size, dma_addr_t dma, int frag_end,
145	int buf_num, enum hns_desc_type type, int mtu)
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
204	static void unfill_desc(struct hnae_ring *ring)
205	{
206	ring_ptr_move_bw(ring, next_to_use);
207	}
208
209	static int hns_nic_maybe_stop_tx(
210	struct sk_buff **out_skb, int *bnum, struct hnae_ring *ring)
211	{
212	struct sk_buff *skb = *out_skb;
213	struct sk_buff *new_skb = NULL;
214	int buf_num;
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)) {
220	if (ring_space(ring) < 1)
221	return -EBUSY;
222
223	new_skb = skb_copy(skb, GFP_ATOMIC);
224	if (!new_skb)
225	return -ENOMEM;
226
227	dev_kfree_skb_any(skb);
228	*out_skb = new_skb;
229	buf_num = 1;
230	} else if (buf_num > ring_space(ring)) {
231	return -EBUSY;
232	}
233
234	*bnum = buf_num;
235	return 0;
236	}
237
238	static 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	skb_frag_t *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
278	static 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_hw(ring, priv, size: k == 0 ? size : 0,
293	send_sz: (k == frag_buf_num - 1) ?
294	sizeoflast : BD_MAX_SEND_SIZE,
295	dma: dma + BD_MAX_SEND_SIZE * k,
296	frag_end: frag_end && (k == frag_buf_num - 1) ? 1 : 0,
297	buf_num,
298	type: (type == DESC_TYPE_SKB && !k) ?
299	DESC_TYPE_SKB : DESC_TYPE_PAGE,
300	mtu);
301	}
302
303	netdev_tx_t 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(dev: ndev);
308	struct hnae_ring *ring = ring_data->ring;
309	struct device *dev = ring_to_dev(ring);
310	struct netdev_queue *dev_queue;
311	skb_frag_t *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:
320	ring->stats.tx_busy++;
321	goto out_net_tx_busy;
322	case -ENOMEM:
323	ring->stats.sw_err_cnt++;
324	netdev_err(dev: ndev, format: "no memory to xmit!\n");
325	goto out_err_tx_ok;
326	default:
327	break;
328	}
329
330	/* no. of segments (plus a header) */
331	seg_num = skb_shinfo(skb)->nr_frags + 1;
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_addr: dma)) {
338	netdev_err(dev: ndev, format: "TX head DMA map failed\n");
339	ring->stats.sw_err_cnt++;
340	goto out_err_tx_ok;
341	}
342	priv->ops.fill_desc(ring, skb, size, dma, seg_num == 1 ? 1 : 0,
343	buf_num, DESC_TYPE_SKB, ndev->mtu);
344
345	/* fill the fragments */
346	for (i = 1; i < seg_num; i++) {
347	frag = &skb_shinfo(skb)->frags[i - 1];
348	size = skb_frag_size(frag);
349	dma = skb_frag_dma_map(dev, frag, offset: 0, size, dir: DMA_TO_DEVICE);
350	if (dma_mapping_error(dev, dma_addr: dma)) {
351	netdev_err(dev: ndev, format: "TX frag(%d) DMA map failed\n", i);
352	ring->stats.sw_err_cnt++;
353	goto out_map_frag_fail;
354	}
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);
358	}
359
360	/*complete translate all packets*/
361	dev_queue = netdev_get_tx_queue(dev: ndev, index: skb->queue_mapping);
362	netdev_tx_sent_queue(dev_queue, bytes: skb->len);
363
364	netif_trans_update(dev: ndev);
365	ndev->stats.tx_bytes += skb->len;
366	ndev->stats.tx_packets++;
367
368	wmb(); /* commit all data before submit */
369	assert(skb->queue_mapping < priv->ae_handle->q_num);
370	hnae_queue_xmit(priv->ae_handle->qs[skb->queue_mapping], buf_num);
371
372	return NETDEV_TX_OK;
373
374	out_map_frag_fail:
375
376	while (ring->next_to_use != next_to_use) {
377	unfill_desc(ring);
378	if (ring->next_to_use != next_to_use)
379	dma_unmap_page(dev,
380	ring->desc_cb[ring->next_to_use].dma,
381	ring->desc_cb[ring->next_to_use].length,
382	DMA_TO_DEVICE);
383	else
384	dma_unmap_single(dev,
385	ring->desc_cb[next_to_use].dma,
386	ring->desc_cb[next_to_use].length,
387	DMA_TO_DEVICE);
388	}
389
390	out_err_tx_ok:
391
392	dev_kfree_skb_any(skb);
393	return NETDEV_TX_OK;
394
395	out_net_tx_busy:
396
397	netif_stop_subqueue(dev: ndev, queue_index: skb->queue_mapping);
398
399	/* Herbert's original patch had:
400	* smp_mb__after_netif_stop_queue();
401	* but since that doesn't exist yet, just open code it.
402	*/
403	smp_mb();
404	return NETDEV_TX_BUSY;
405	}
406
407	static void hns_nic_reuse_page(struct sk_buff *skb, int i,
408	struct hnae_ring *ring, int pull_len,
409	struct hnae_desc_cb *desc_cb)
410	{
411	struct hnae_desc *desc;
412	u32 truesize;
413	int size;
414	int last_offset;
415	bool twobufs;
416
417	twobufs = ((PAGE_SIZE < 8192) &&
418	hnae_buf_size(ring) == HNS_BUFFER_SIZE_2048);
419
420	desc = &ring->desc[ring->next_to_clean];
421	size = le16_to_cpu(desc->rx.size);
422
423	if (twobufs) {
424	truesize = hnae_buf_size(ring);
425	} else {
426	truesize = ALIGN(size, L1_CACHE_BYTES);
427	last_offset = hnae_page_size(ring) - hnae_buf_size(ring);
428	}
429
430	skb_add_rx_frag(skb, i, page: desc_cb->priv, off: desc_cb->page_offset + pull_len,
431	size: size - pull_len, truesize);
432
433	/* avoid re-using remote pages,flag default unreuse */
434	if (unlikely(page_to_nid(desc_cb->priv) != numa_node_id()))
435	return;
436
437	if (twobufs) {
438	/* if we are only owner of page we can reuse it */
439	if (likely(page_count(desc_cb->priv) == 1)) {
440	/* flip page offset to other buffer */
441	desc_cb->page_offset ^= truesize;
442
443	desc_cb->reuse_flag = 1;
444	/* bump ref count on page before it is given*/
445	get_page(page: desc_cb->priv);
446	}
447	return;
448	}
449
450	/* move offset up to the next cache line */
451	desc_cb->page_offset += truesize;
452
453	if (desc_cb->page_offset <= last_offset) {
454	desc_cb->reuse_flag = 1;
455	/* bump ref count on page before it is given*/
456	get_page(page: desc_cb->priv);
457	}
458	}
459
460	static void get_v2rx_desc_bnum(u32 bnum_flag, int *out_bnum)
461	{
462	*out_bnum = hnae_get_field(bnum_flag,
463	HNS_RXD_BUFNUM_M, HNS_RXD_BUFNUM_S) + 1;
464	}
465
466	static void get_rx_desc_bnum(u32 bnum_flag, int *out_bnum)
467	{
468	*out_bnum = hnae_get_field(bnum_flag,
469	HNS_RXD_BUFNUM_M, HNS_RXD_BUFNUM_S);
470	}
471
472	static void hns_nic_rx_checksum(struct hns_nic_ring_data *ring_data,
473	struct sk_buff *skb, u32 flag)
474	{
475	struct net_device *netdev = ring_data->napi.dev;
476	u32 l3id;
477	u32 l4id;
478
479	/* check if RX checksum offload is enabled */
480	if (unlikely(!(netdev->features & NETIF_F_RXCSUM)))
481	return;
482
483	/* In hardware, we only support checksum for the following protocols:
484	* 1) IPv4,
485	* 2) TCP(over IPv4 or IPv6),
486	* 3) UDP(over IPv4 or IPv6),
487	* 4) SCTP(over IPv4 or IPv6)
488	* but we support many L3(IPv4, IPv6, MPLS, PPPoE etc) and L4(TCP,
489	* UDP, GRE, SCTP, IGMP, ICMP etc.) protocols.
490	*
491	* Hardware limitation:
492	* Our present hardware RX Descriptor lacks L3/L4 checksum "Status &
493	* Error" bit (which usually can be used to indicate whether checksum
494	* was calculated by the hardware and if there was any error encountered
495	* during checksum calculation).
496	*
497	* Software workaround:
498	* We do get info within the RX descriptor about the kind of L3/L4
499	* protocol coming in the packet and the error status. These errors
500	* might not just be checksum errors but could be related to version,
501	* length of IPv4, UDP, TCP etc.
502	* Because there is no-way of knowing if it is a L3/L4 error due to bad
503	* checksum or any other L3/L4 error, we will not (cannot) convey
504	* checksum status for such cases to upper stack and will not maintain
505	* the RX L3/L4 checksum counters as well.
506	*/
507
508	l3id = hnae_get_field(flag, HNS_RXD_L3ID_M, HNS_RXD_L3ID_S);
509	l4id = hnae_get_field(flag, HNS_RXD_L4ID_M, HNS_RXD_L4ID_S);
510
511	/* check L3 protocol for which checksum is supported */
512	if ((l3id != HNS_RX_FLAG_L3ID_IPV4) && (l3id != HNS_RX_FLAG_L3ID_IPV6))
513	return;
514
515	/* check for any(not just checksum)flagged L3 protocol errors */
516	if (unlikely(hnae_get_bit(flag, HNS_RXD_L3E_B)))
517	return;
518
519	/* we do not support checksum of fragmented packets */
520	if (unlikely(hnae_get_bit(flag, HNS_RXD_FRAG_B)))
521	return;
522
523	/* check L4 protocol for which checksum is supported */
524	if ((l4id != HNS_RX_FLAG_L4ID_TCP) &&
525	(l4id != HNS_RX_FLAG_L4ID_UDP) &&
526	(l4id != HNS_RX_FLAG_L4ID_SCTP))
527	return;
528
529	/* check for any(not just checksum)flagged L4 protocol errors */
530	if (unlikely(hnae_get_bit(flag, HNS_RXD_L4E_B)))
531	return;
532
533	/* now, this has to be a packet with valid RX checksum */
534	skb->ip_summed = CHECKSUM_UNNECESSARY;
535	}
536
537	static int hns_nic_poll_rx_skb(struct hns_nic_ring_data *ring_data,
538	struct sk_buff **out_skb, int *out_bnum)
539	{
540	struct hnae_ring *ring = ring_data->ring;
541	struct net_device *ndev = ring_data->napi.dev;
542	struct hns_nic_priv *priv = netdev_priv(dev: ndev);
543	struct sk_buff *skb;
544	struct hnae_desc *desc;
545	struct hnae_desc_cb *desc_cb;
546	unsigned char *va;
547	int bnum, length, i;
548	int pull_len;
549	u32 bnum_flag;
550
551	desc = &ring->desc[ring->next_to_clean];
552	desc_cb = &ring->desc_cb[ring->next_to_clean];
553
554	prefetch(desc);
555
556	va = (unsigned char *)desc_cb->buf + desc_cb->page_offset;
557
558	/* prefetch first cache line of first page */
559	net_prefetch(p: va);
560
561	skb = *out_skb = napi_alloc_skb(napi: &ring_data->napi,
562	HNS_RX_HEAD_SIZE);
563	if (unlikely(!skb)) {
564	ring->stats.sw_err_cnt++;
565	return -ENOMEM;
566	}
567
568	prefetchw(x: skb->data);
569	length = le16_to_cpu(desc->rx.pkt_len);
570	bnum_flag = le32_to_cpu(desc->rx.ipoff_bnum_pid_flag);
571	priv->ops.get_rxd_bnum(bnum_flag, &bnum);
572	*out_bnum = bnum;
573
574	if (length <= HNS_RX_HEAD_SIZE) {
575	memcpy(__skb_put(skb, length), va, ALIGN(length, sizeof(long)));
576
577	/* we can reuse buffer as-is, just make sure it is local */
578	if (likely(page_to_nid(desc_cb->priv) == numa_node_id()))
579	desc_cb->reuse_flag = 1;
580	else /* this page cannot be reused so discard it */
581	put_page(page: desc_cb->priv);
582
583	ring_ptr_move_fw(ring, next_to_clean);
584
585	if (unlikely(bnum != 1)) { /* check err*/
586	*out_bnum = 1;
587	goto out_bnum_err;
588	}
589	} else {
590	ring->stats.seg_pkt_cnt++;
591
592	pull_len = eth_get_headlen(dev: ndev, data: va, HNS_RX_HEAD_SIZE);
593	memcpy(__skb_put(skb, pull_len), va,
594	ALIGN(pull_len, sizeof(long)));
595
596	hns_nic_reuse_page(skb, i: 0, ring, pull_len, desc_cb);
597	ring_ptr_move_fw(ring, next_to_clean);
598
599	if (unlikely(bnum >= (int)MAX_SKB_FRAGS)) { /* check err*/
600	*out_bnum = 1;
601	goto out_bnum_err;
602	}
603	for (i = 1; i < bnum; i++) {
604	desc = &ring->desc[ring->next_to_clean];
605	desc_cb = &ring->desc_cb[ring->next_to_clean];
606
607	hns_nic_reuse_page(skb, i, ring, pull_len: 0, desc_cb);
608	ring_ptr_move_fw(ring, next_to_clean);
609	}
610	}
611
612	/* check except process, free skb and jump the desc */
613	if (unlikely((!bnum) || (bnum > ring->max_desc_num_per_pkt))) {
614	out_bnum_err:
615	*out_bnum = *out_bnum ? *out_bnum : 1; /* ntc moved,cannot 0*/
616	netdev_err(dev: ndev, format: "invalid bnum(%d,%d,%d,%d),%016llx,%016llx\n",
617	bnum, ring->max_desc_num_per_pkt,
618	length, (int)MAX_SKB_FRAGS,
619	((u64 *)desc)[0], ((u64 *)desc)[1]);
620	ring->stats.err_bd_num++;
621	dev_kfree_skb_any(skb);
622	return -EDOM;
623	}
624
625	bnum_flag = le32_to_cpu(desc->rx.ipoff_bnum_pid_flag);
626
627	if (unlikely(!hnae_get_bit(bnum_flag, HNS_RXD_VLD_B))) {
628	netdev_err(dev: ndev, format: "no valid bd,%016llx,%016llx\n",
629	((u64 *)desc)[0], ((u64 *)desc)[1]);
630	ring->stats.non_vld_descs++;
631	dev_kfree_skb_any(skb);
632	return -EINVAL;
633	}
634
635	if (unlikely((!desc->rx.pkt_len) ||
636	hnae_get_bit(bnum_flag, HNS_RXD_DROP_B))) {
637	ring->stats.err_pkt_len++;
638	dev_kfree_skb_any(skb);
639	return -EFAULT;
640	}
641
642	if (unlikely(hnae_get_bit(bnum_flag, HNS_RXD_L2E_B))) {
643	ring->stats.l2_err++;
644	dev_kfree_skb_any(skb);
645	return -EFAULT;
646	}
647
648	ring->stats.rx_pkts++;
649	ring->stats.rx_bytes += skb->len;
650
651	/* indicate to upper stack if our hardware has already calculated
652	* the RX checksum
653	*/
654	hns_nic_rx_checksum(ring_data, skb, flag: bnum_flag);
655
656	return 0;
657	}
658
659	static void
660	hns_nic_alloc_rx_buffers(struct hns_nic_ring_data *ring_data, int cleand_count)
661	{
662	int i, ret;
663	struct hnae_desc_cb res_cbs;
664	struct hnae_desc_cb *desc_cb;
665	struct hnae_ring *ring = ring_data->ring;
666	struct net_device *ndev = ring_data->napi.dev;
667
668	for (i = 0; i < cleand_count; i++) {
669	desc_cb = &ring->desc_cb[ring->next_to_use];
670	if (desc_cb->reuse_flag) {
671	ring->stats.reuse_pg_cnt++;
672	hnae_reuse_buffer(ring, i: ring->next_to_use);
673	} else {
674	ret = hnae_reserve_buffer_map(ring, cb: &res_cbs);
675	if (ret) {
676	ring->stats.sw_err_cnt++;
677	netdev_err(dev: ndev, format: "hnae reserve buffer map failed.\n");
678	break;
679	}
680	hnae_replace_buffer(ring, i: ring->next_to_use, res_cb: &res_cbs);
681	}
682
683	ring_ptr_move_fw(ring, next_to_use);
684	}
685
686	wmb(); /* make all data has been write before submit */
687	writel_relaxed(i, ring->io_base + RCB_REG_HEAD);
688	}
689
690	/* return error number for error or number of desc left to take
691	*/
692	static void hns_nic_rx_up_pro(struct hns_nic_ring_data *ring_data,
693	struct sk_buff *skb)
694	{
695	struct net_device *ndev = ring_data->napi.dev;
696
697	skb->protocol = eth_type_trans(skb, dev: ndev);
698	napi_gro_receive(napi: &ring_data->napi, skb);
699	}
700
701	static int hns_desc_unused(struct hnae_ring *ring)
702	{
703	int ntc = ring->next_to_clean;
704	int ntu = ring->next_to_use;
705
706	return ((ntc >= ntu) ? 0 : ring->desc_num) + ntc - ntu;
707	}
708
709	#define HNS_LOWEST_LATENCY_RATE 27 /* 27 MB/s */
710	#define HNS_LOW_LATENCY_RATE 80 /* 80 MB/s */
711
712	#define HNS_COAL_BDNUM 3
713
714	static u32 hns_coal_rx_bdnum(struct hnae_ring *ring)
715	{
716	bool coal_enable = ring->q->handle->coal_adapt_en;
717
718	if (coal_enable &&
719	ring->coal_last_rx_bytes > HNS_LOWEST_LATENCY_RATE)
720	return HNS_COAL_BDNUM;
721	else
722	return 0;
723	}
724
725	static void hns_update_rx_rate(struct hnae_ring *ring)
726	{
727	bool coal_enable = ring->q->handle->coal_adapt_en;
728	u32 time_passed_ms;
729	u64 total_bytes;
730
731	if (!coal_enable ||
732	time_before(jiffies, ring->coal_last_jiffies + (HZ >> 4)))
733	return;
734
735	/* ring->stats.rx_bytes overflowed */
736	if (ring->coal_last_rx_bytes > ring->stats.rx_bytes) {
737	ring->coal_last_rx_bytes = ring->stats.rx_bytes;
738	ring->coal_last_jiffies = jiffies;
739	return;
740	}
741
742	total_bytes = ring->stats.rx_bytes - ring->coal_last_rx_bytes;
743	time_passed_ms = jiffies_to_msecs(j: jiffies - ring->coal_last_jiffies);
744	do_div(total_bytes, time_passed_ms);
745	ring->coal_rx_rate = total_bytes >> 10;
746
747	ring->coal_last_rx_bytes = ring->stats.rx_bytes;
748	ring->coal_last_jiffies = jiffies;
749	}
750
751	/**
752	* smooth_alg - smoothing algrithm for adjusting coalesce parameter
753	* @new_param: new value
754	* @old_param: old value
755	**/
756	static u32 smooth_alg(u32 new_param, u32 old_param)
757	{
758	u32 gap = (new_param > old_param) ? new_param - old_param
759	: old_param - new_param;
760
761	if (gap > 8)
762	gap >>= 3;
763
764	if (new_param > old_param)
765	return old_param + gap;
766	else
767	return old_param - gap;
768	}
769
770	/**
771	* hns_nic_adpt_coalesce - self adapte coalesce according to rx rate
772	* @ring_data: pointer to hns_nic_ring_data
773	**/
774	static void hns_nic_adpt_coalesce(struct hns_nic_ring_data *ring_data)
775	{
776	struct hnae_ring *ring = ring_data->ring;
777	struct hnae_handle *handle = ring->q->handle;
778	u32 new_coal_param, old_coal_param = ring->coal_param;
779
780	if (ring->coal_rx_rate < HNS_LOWEST_LATENCY_RATE)
781	new_coal_param = HNAE_LOWEST_LATENCY_COAL_PARAM;
782	else if (ring->coal_rx_rate < HNS_LOW_LATENCY_RATE)
783	new_coal_param = HNAE_LOW_LATENCY_COAL_PARAM;
784	else
785	new_coal_param = HNAE_BULK_LATENCY_COAL_PARAM;
786
787	if (new_coal_param == old_coal_param &&
788	new_coal_param == handle->coal_param)
789	return;
790
791	new_coal_param = smooth_alg(new_param: new_coal_param, old_param: old_coal_param);
792	ring->coal_param = new_coal_param;
793
794	/**
795	* Because all ring in one port has one coalesce param, when one ring
796	* calculate its own coalesce param, it cannot write to hardware at
797	* once. There are three conditions as follows:
798	* 1. current ring's coalesce param is larger than the hardware.
799	* 2. or ring which adapt last time can change again.
800	* 3. timeout.
801	*/
802	if (new_coal_param == handle->coal_param) {
803	handle->coal_last_jiffies = jiffies;
804	handle->coal_ring_idx = ring_data->queue_index;
805	} else if (new_coal_param > handle->coal_param ||
806	handle->coal_ring_idx == ring_data->queue_index ||
807	time_after(jiffies, handle->coal_last_jiffies + (HZ >> 4))) {
808	handle->dev->ops->set_coalesce_usecs(handle,
809	new_coal_param);
810	handle->dev->ops->set_coalesce_frames(handle,
811	1, new_coal_param);
812	handle->coal_param = new_coal_param;
813	handle->coal_ring_idx = ring_data->queue_index;
814	handle->coal_last_jiffies = jiffies;
815	}
816	}
817
818	static int hns_nic_rx_poll_one(struct hns_nic_ring_data *ring_data,
819	int budget, void *v)
820	{
821	struct hnae_ring *ring = ring_data->ring;
822	struct sk_buff *skb;
823	int num, bnum;
824	#define RCB_NOF_ALLOC_RX_BUFF_ONCE 16
825	int recv_pkts, recv_bds, clean_count, err;
826	int unused_count = hns_desc_unused(ring);
827
828	num = readl_relaxed(ring->io_base + RCB_REG_FBDNUM);
829	rmb(); /* make sure num taken effect before the other data is touched */
830
831	recv_pkts = 0, recv_bds = 0, clean_count = 0;
832	num -= unused_count;
833
834	while (recv_pkts < budget && recv_bds < num) {
835	/* reuse or realloc buffers */
836	if (clean_count + unused_count >= RCB_NOF_ALLOC_RX_BUFF_ONCE) {
837	hns_nic_alloc_rx_buffers(ring_data,
838	cleand_count: clean_count + unused_count);
839	clean_count = 0;
840	unused_count = hns_desc_unused(ring);
841	}
842
843	/* poll one pkt */
844	err = hns_nic_poll_rx_skb(ring_data, out_skb: &skb, out_bnum: &bnum);
845	if (unlikely(!skb)) /* this fault cannot be repaired */
846	goto out;
847
848	recv_bds += bnum;
849	clean_count += bnum;
850	if (unlikely(err)) { /* do jump the err */
851	recv_pkts++;
852	continue;
853	}
854
855	/* do update ip stack process*/
856	((void (*)(struct hns_nic_ring_data *, struct sk_buff *))v)(
857	ring_data, skb);
858	recv_pkts++;
859	}
860
861	out:
862	/* make all data has been write before submit */
863	if (clean_count + unused_count > 0)
864	hns_nic_alloc_rx_buffers(ring_data,
865	cleand_count: clean_count + unused_count);
866
867	return recv_pkts;
868	}
869
870	static bool hns_nic_rx_fini_pro(struct hns_nic_ring_data *ring_data)
871	{
872	struct hnae_ring *ring = ring_data->ring;
873	int num;
874	bool rx_stopped;
875
876	hns_update_rx_rate(ring);
877
878	/* for hardware bug fixed */
879	ring_data->ring->q->handle->dev->ops->toggle_ring_irq(ring, 0);
880	num = readl_relaxed(ring->io_base + RCB_REG_FBDNUM);
881
882	if (num <= hns_coal_rx_bdnum(ring)) {
883	if (ring->q->handle->coal_adapt_en)
884	hns_nic_adpt_coalesce(ring_data);
885
886	rx_stopped = true;
887	} else {
888	ring_data->ring->q->handle->dev->ops->toggle_ring_irq(
889	ring_data->ring, 1);
890
891	rx_stopped = false;
892	}
893
894	return rx_stopped;
895	}
896
897	static bool hns_nic_rx_fini_pro_v2(struct hns_nic_ring_data *ring_data)
898	{
899	struct hnae_ring *ring = ring_data->ring;
900	int num;
901
902	hns_update_rx_rate(ring);
903	num = readl_relaxed(ring->io_base + RCB_REG_FBDNUM);
904
905	if (num <= hns_coal_rx_bdnum(ring)) {
906	if (ring->q->handle->coal_adapt_en)
907	hns_nic_adpt_coalesce(ring_data);
908
909	return true;
910	}
911
912	return false;
913	}
914
915	static inline void hns_nic_reclaim_one_desc(struct hnae_ring *ring,
916	int *bytes, int *pkts)
917	{
918	struct hnae_desc_cb *desc_cb = &ring->desc_cb[ring->next_to_clean];
919
920	(*pkts) += (desc_cb->type == DESC_TYPE_SKB);
921	(*bytes) += desc_cb->length;
922	/* desc_cb will be cleaned, after hnae_free_buffer_detach*/
923	hnae_free_buffer_detach(ring, i: ring->next_to_clean);
924
925	ring_ptr_move_fw(ring, next_to_clean);
926	}
927
928	static int is_valid_clean_head(struct hnae_ring *ring, int h)
929	{
930	int u = ring->next_to_use;
931	int c = ring->next_to_clean;
932
933	if (unlikely(h > ring->desc_num))
934	return 0;
935
936	assert(u > 0 && u < ring->desc_num);
937	assert(c > 0 && c < ring->desc_num);
938	assert(u != c && h != c); /* must be checked before call this func */
939
940	return u > c ? (h > c && h <= u) : (h > c || h <= u);
941	}
942
943	/* reclaim all desc in one budget
944	* return error or number of desc left
945	*/
946	static int hns_nic_tx_poll_one(struct hns_nic_ring_data *ring_data,
947	int budget, void *v)
948	{
949	struct hnae_ring *ring = ring_data->ring;
950	struct net_device *ndev = ring_data->napi.dev;
951	struct netdev_queue *dev_queue;
952	struct hns_nic_priv *priv = netdev_priv(dev: ndev);
953	int head;
954	int bytes, pkts;
955
956	head = readl_relaxed(ring->io_base + RCB_REG_HEAD);
957	rmb(); /* make sure head is ready before touch any data */
958
959	if (is_ring_empty(ring) || head == ring->next_to_clean)
960	return 0; /* no data to poll */
961
962	if (!is_valid_clean_head(ring, h: head)) {
963	netdev_err(dev: ndev, format: "wrong head (%d, %d-%d)\n", head,
964	ring->next_to_use, ring->next_to_clean);
965	ring->stats.io_err_cnt++;
966	return -EIO;
967	}
968
969	bytes = 0;
970	pkts = 0;
971	while (head != ring->next_to_clean) {
972	hns_nic_reclaim_one_desc(ring, bytes: &bytes, pkts: &pkts);
973	/* issue prefetch for next Tx descriptor */
974	prefetch(&ring->desc_cb[ring->next_to_clean]);
975	}
976	/* update tx ring statistics. */
977	ring->stats.tx_pkts += pkts;
978	ring->stats.tx_bytes += bytes;
979
980	dev_queue = netdev_get_tx_queue(dev: ndev, index: ring_data->queue_index);
981	netdev_tx_completed_queue(dev_queue, pkts, bytes);
982
983	if (unlikely(priv->link && !netif_carrier_ok(ndev)))
984	netif_carrier_on(dev: ndev);
985
986	if (unlikely(pkts && netif_carrier_ok(ndev) &&
987	(ring_space(ring) >= ring->max_desc_num_per_pkt * 2))) {
988	/* Make sure that anybody stopping the queue after this
989	* sees the new next_to_clean.
990	*/
991	smp_mb();
992	if (netif_tx_queue_stopped(dev_queue) &&
993	!test_bit(NIC_STATE_DOWN, &priv->state)) {
994	netif_tx_wake_queue(dev_queue);
995	ring->stats.restart_queue++;
996	}
997	}
998	return 0;
999	}
1000
1001	static bool hns_nic_tx_fini_pro(struct hns_nic_ring_data *ring_data)
1002	{
1003	struct hnae_ring *ring = ring_data->ring;
1004	int head;
1005
1006	ring_data->ring->q->handle->dev->ops->toggle_ring_irq(ring, 0);
1007
1008	head = readl_relaxed(ring->io_base + RCB_REG_HEAD);
1009
1010	if (head != ring->next_to_clean) {
1011	ring_data->ring->q->handle->dev->ops->toggle_ring_irq(
1012	ring_data->ring, 1);
1013
1014	return false;
1015	} else {
1016	return true;
1017	}
1018	}
1019
1020	static bool hns_nic_tx_fini_pro_v2(struct hns_nic_ring_data *ring_data)
1021	{
1022	struct hnae_ring *ring = ring_data->ring;
1023	int head = readl_relaxed(ring->io_base + RCB_REG_HEAD);
1024
1025	if (head == ring->next_to_clean)
1026	return true;
1027	else
1028	return false;
1029	}
1030
1031	static void hns_nic_tx_clr_all_bufs(struct hns_nic_ring_data *ring_data)
1032	{
1033	struct hnae_ring *ring = ring_data->ring;
1034	struct net_device *ndev = ring_data->napi.dev;
1035	struct netdev_queue *dev_queue;
1036	int head;
1037	int bytes, pkts;
1038
1039	head = ring->next_to_use; /* ntu :soft setted ring position*/
1040	bytes = 0;
1041	pkts = 0;
1042	while (head != ring->next_to_clean)
1043	hns_nic_reclaim_one_desc(ring, bytes: &bytes, pkts: &pkts);
1044
1045	dev_queue = netdev_get_tx_queue(dev: ndev, index: ring_data->queue_index);
1046	netdev_tx_reset_queue(q: dev_queue);
1047	}
1048
1049	static int hns_nic_common_poll(struct napi_struct *napi, int budget)
1050	{
1051	int clean_complete = 0;
1052	struct hns_nic_ring_data *ring_data =
1053	container_of(napi, struct hns_nic_ring_data, napi);
1054	struct hnae_ring *ring = ring_data->ring;
1055
1056	clean_complete += ring_data->poll_one(
1057	ring_data, budget - clean_complete,
1058	ring_data->ex_process);
1059
1060	if (clean_complete < budget) {
1061	if (ring_data->fini_process(ring_data)) {
1062	napi_complete(n: napi);
1063	ring->q->handle->dev->ops->toggle_ring_irq(ring, 0);
1064	} else {
1065	return budget;
1066	}
1067	}
1068
1069	return clean_complete;
1070	}
1071
1072	static irqreturn_t hns_irq_handle(int irq, void *dev)
1073	{
1074	struct hns_nic_ring_data *ring_data = (struct hns_nic_ring_data *)dev;
1075
1076	ring_data->ring->q->handle->dev->ops->toggle_ring_irq(
1077	ring_data->ring, 1);
1078	napi_schedule(n: &ring_data->napi);
1079
1080	return IRQ_HANDLED;
1081	}
1082
1083	/**
1084	*hns_nic_adjust_link - adjust net work mode by the phy stat or new param
1085	*@ndev: net device
1086	*/
1087	static void hns_nic_adjust_link(struct net_device *ndev)
1088	{
1089	struct hns_nic_priv *priv = netdev_priv(dev: ndev);
1090	struct hnae_handle *h = priv->ae_handle;
1091	int state = 1;
1092
1093	/* If there is no phy, do not need adjust link */
1094	if (ndev->phydev) {
1095	/* When phy link down, do nothing */
1096	if (ndev->phydev->link == 0)
1097	return;
1098
1099	if (h->dev->ops->need_adjust_link(h, ndev->phydev->speed,
1100	ndev->phydev->duplex)) {
1101	/* because Hi161X chip don't support to change gmac
1102	* speed and duplex with traffic. Delay 200ms to
1103	* make sure there is no more data in chip FIFO.
1104	*/
1105	netif_carrier_off(dev: ndev);
1106	msleep(msecs: 200);
1107	h->dev->ops->adjust_link(h, ndev->phydev->speed,
1108	ndev->phydev->duplex);
1109	netif_carrier_on(dev: ndev);
1110	}
1111	}
1112
1113	state = state && h->dev->ops->get_status(h);
1114
1115	if (state != priv->link) {
1116	if (state) {
1117	netif_carrier_on(dev: ndev);
1118	netif_tx_wake_all_queues(dev: ndev);
1119	netdev_info(dev: ndev, format: "link up\n");
1120	} else {
1121	netif_carrier_off(dev: ndev);
1122	netdev_info(dev: ndev, format: "link down\n");
1123	}
1124	priv->link = state;
1125	}
1126	}
1127
1128	/**
1129	*hns_nic_init_phy - init phy
1130	*@ndev: net device
1131	*@h: ae handle
1132	* Return 0 on success, negative on failure
1133	*/
1134	int hns_nic_init_phy(struct net_device *ndev, struct hnae_handle *h)
1135	{
1136	__ETHTOOL_DECLARE_LINK_MODE_MASK(supported) = { 0, };
1137	struct phy_device *phy_dev = h->phy_dev;
1138	int ret;
1139
1140	if (!h->phy_dev)
1141	return 0;
1142
1143	ethtool_convert_legacy_u32_to_link_mode(dst: supported, legacy_u32: h->if_support);
1144	linkmode_and(dst: phy_dev->supported, a: phy_dev->supported, b: supported);
1145	linkmode_copy(dst: phy_dev->advertising, src: phy_dev->supported);
1146
1147	if (h->phy_if == PHY_INTERFACE_MODE_XGMII)
1148	phy_dev->autoneg = false;
1149
1150	if (h->phy_if != PHY_INTERFACE_MODE_XGMII) {
1151	phy_dev->dev_flags = 0;
1152
1153	ret = phy_connect_direct(dev: ndev, phydev: phy_dev, handler: hns_nic_adjust_link,
1154	interface: h->phy_if);
1155	} else {
1156	ret = phy_attach_direct(dev: ndev, phydev: phy_dev, flags: 0, interface: h->phy_if);
1157	}
1158	if (unlikely(ret))
1159	return -ENODEV;
1160
1161	phy_attached_info(phydev: phy_dev);
1162
1163	return 0;
1164	}
1165
1166	static int hns_nic_ring_open(struct net_device *netdev, int idx)
1167	{
1168	struct hns_nic_priv *priv = netdev_priv(dev: netdev);
1169	struct hnae_handle *h = priv->ae_handle;
1170
1171	napi_enable(n: &priv->ring_data[idx].napi);
1172
1173	enable_irq(irq: priv->ring_data[idx].ring->irq);
1174	h->dev->ops->toggle_ring_irq(priv->ring_data[idx].ring, 0);
1175
1176	return 0;
1177	}
1178
1179	static int hns_nic_net_set_mac_address(struct net_device *ndev, void *p)
1180	{
1181	struct hns_nic_priv *priv = netdev_priv(dev: ndev);
1182	struct hnae_handle *h = priv->ae_handle;
1183	struct sockaddr *mac_addr = p;
1184	int ret;
1185
1186	if (!mac_addr || !is_valid_ether_addr(addr: (const u8 *)mac_addr->sa_data))
1187	return -EADDRNOTAVAIL;
1188
1189	ret = h->dev->ops->set_mac_addr(h, mac_addr->sa_data);
1190	if (ret) {
1191	netdev_err(dev: ndev, format: "set_mac_address fail, ret=%d!\n", ret);
1192	return ret;
1193	}
1194
1195	eth_hw_addr_set(dev: ndev, addr: mac_addr->sa_data);
1196
1197	return 0;
1198	}
1199
1200	static void hns_nic_update_stats(struct net_device *netdev)
1201	{
1202	struct hns_nic_priv *priv = netdev_priv(dev: netdev);
1203	struct hnae_handle *h = priv->ae_handle;
1204
1205	h->dev->ops->update_stats(h, &netdev->stats);
1206	}
1207
1208	/* set mac addr if it is configed. or leave it to the AE driver */
1209	static void hns_init_mac_addr(struct net_device *ndev)
1210	{
1211	struct hns_nic_priv *priv = netdev_priv(dev: ndev);
1212
1213	if (device_get_ethdev_address(dev: priv->dev, netdev: ndev)) {
1214	eth_hw_addr_random(dev: ndev);
1215	dev_warn(priv->dev, "No valid mac, use random mac %pM",
1216	ndev->dev_addr);
1217	}
1218	}
1219
1220	static void hns_nic_ring_close(struct net_device *netdev, int idx)
1221	{
1222	struct hns_nic_priv *priv = netdev_priv(dev: netdev);
1223	struct hnae_handle *h = priv->ae_handle;
1224
1225	h->dev->ops->toggle_ring_irq(priv->ring_data[idx].ring, 1);
1226	disable_irq(irq: priv->ring_data[idx].ring->irq);
1227
1228	napi_disable(n: &priv->ring_data[idx].napi);
1229	}
1230
1231	static int hns_nic_init_affinity_mask(int q_num, int ring_idx,
1232	struct hnae_ring *ring, cpumask_t *mask)
1233	{
1234	int cpu;
1235
1236	/* Different irq balance between 16core and 32core.
1237	* The cpu mask set by ring index according to the ring flag
1238	* which indicate the ring is tx or rx.
1239	*/
1240	if (q_num == num_possible_cpus()) {
1241	if (is_tx_ring(ring))
1242	cpu = ring_idx;
1243	else
1244	cpu = ring_idx - q_num;
1245	} else {
1246	if (is_tx_ring(ring))
1247	cpu = ring_idx * 2;
1248	else
1249	cpu = (ring_idx - q_num) * 2 + 1;
1250	}
1251
1252	cpumask_clear(dstp: mask);
1253	cpumask_set_cpu(cpu, dstp: mask);
1254
1255	return cpu;
1256	}
1257
1258	static void hns_nic_free_irq(int q_num, struct hns_nic_priv *priv)
1259	{
1260	int i;
1261
1262	for (i = 0; i < q_num * 2; i++) {
1263	if (priv->ring_data[i].ring->irq_init_flag == RCB_IRQ_INITED) {
1264	irq_set_affinity_hint(irq: priv->ring_data[i].ring->irq,
1265	NULL);
1266	free_irq(priv->ring_data[i].ring->irq,
1267	&priv->ring_data[i]);
1268	priv->ring_data[i].ring->irq_init_flag =
1269	RCB_IRQ_NOT_INITED;
1270	}
1271	}
1272	}
1273
1274	static int hns_nic_init_irq(struct hns_nic_priv *priv)
1275	{
1276	struct hnae_handle *h = priv->ae_handle;
1277	struct hns_nic_ring_data *rd;
1278	int i;
1279	int ret;
1280	int cpu;
1281
1282	for (i = 0; i < h->q_num * 2; i++) {
1283	rd = &priv->ring_data[i];
1284
1285	if (rd->ring->irq_init_flag == RCB_IRQ_INITED)
1286	break;
1287
1288	snprintf(buf: rd->ring->ring_name, RCB_RING_NAME_LEN,
1289	fmt: "%s-%s%d", priv->netdev->name,
1290	(is_tx_ring(rd->ring) ? "tx" : "rx"), rd->queue_index);
1291
1292	rd->ring->ring_name[RCB_RING_NAME_LEN - 1] = '\0';
1293
1294	irq_set_status_flags(irq: rd->ring->irq, set: IRQ_NOAUTOEN);
1295	ret = request_irq(irq: rd->ring->irq,
1296	handler: hns_irq_handle, flags: 0, name: rd->ring->ring_name, dev: rd);
1297	if (ret) {
1298	netdev_err(dev: priv->netdev, format: "request irq(%d) fail\n",
1299	rd->ring->irq);
1300	goto out_free_irq;
1301	}
1302
1303	cpu = hns_nic_init_affinity_mask(q_num: h->q_num, ring_idx: i,
1304	ring: rd->ring, mask: &rd->mask);
1305
1306	if (cpu_online(cpu))
1307	irq_set_affinity_hint(irq: rd->ring->irq,
1308	m: &rd->mask);
1309
1310	rd->ring->irq_init_flag = RCB_IRQ_INITED;
1311	}
1312
1313	return 0;
1314
1315	out_free_irq:
1316	hns_nic_free_irq(q_num: h->q_num, priv);
1317	return ret;
1318	}
1319
1320	static int hns_nic_net_up(struct net_device *ndev)
1321	{
1322	struct hns_nic_priv *priv = netdev_priv(dev: ndev);
1323	struct hnae_handle *h = priv->ae_handle;
1324	int i, j;
1325	int ret;
1326
1327	if (!test_bit(NIC_STATE_DOWN, &priv->state))
1328	return 0;
1329
1330	ret = hns_nic_init_irq(priv);
1331	if (ret != 0) {
1332	netdev_err(dev: ndev, format: "hns init irq failed! ret=%d\n", ret);
1333	return ret;
1334	}
1335
1336	for (i = 0; i < h->q_num * 2; i++) {
1337	ret = hns_nic_ring_open(netdev: ndev, idx: i);
1338	if (ret)
1339	goto out_has_some_queues;
1340	}
1341
1342	ret = h->dev->ops->set_mac_addr(h, ndev->dev_addr);
1343	if (ret)
1344	goto out_set_mac_addr_err;
1345
1346	ret = h->dev->ops->start ? h->dev->ops->start(h) : 0;
1347	if (ret)
1348	goto out_start_err;
1349
1350	if (ndev->phydev)
1351	phy_start(phydev: ndev->phydev);
1352
1353	clear_bit(nr: NIC_STATE_DOWN, addr: &priv->state);
1354	(void)mod_timer(timer: &priv->service_timer, expires: jiffies + SERVICE_TIMER_HZ);
1355
1356	return 0;
1357
1358	out_start_err:
1359	netif_stop_queue(dev: ndev);
1360	out_set_mac_addr_err:
1361	out_has_some_queues:
1362	for (j = i - 1; j >= 0; j--)
1363	hns_nic_ring_close(netdev: ndev, idx: j);
1364
1365	hns_nic_free_irq(q_num: h->q_num, priv);
1366	set_bit(nr: NIC_STATE_DOWN, addr: &priv->state);
1367
1368	return ret;
1369	}
1370
1371	static void hns_nic_net_down(struct net_device *ndev)
1372	{
1373	int i;
1374	struct hnae_ae_ops *ops;
1375	struct hns_nic_priv *priv = netdev_priv(dev: ndev);
1376
1377	if (test_and_set_bit(nr: NIC_STATE_DOWN, addr: &priv->state))
1378	return;
1379
1380	(void)del_timer_sync(timer: &priv->service_timer);
1381	netif_tx_stop_all_queues(dev: ndev);
1382	netif_carrier_off(dev: ndev);
1383	netif_tx_disable(dev: ndev);
1384	priv->link = 0;
1385
1386	if (ndev->phydev)
1387	phy_stop(phydev: ndev->phydev);
1388
1389	ops = priv->ae_handle->dev->ops;
1390
1391	if (ops->stop)
1392	ops->stop(priv->ae_handle);
1393
1394	netif_tx_stop_all_queues(dev: ndev);
1395
1396	for (i = priv->ae_handle->q_num - 1; i >= 0; i--) {
1397	hns_nic_ring_close(netdev: ndev, idx: i);
1398	hns_nic_ring_close(netdev: ndev, idx: i + priv->ae_handle->q_num);
1399
1400	/* clean tx buffers*/
1401	hns_nic_tx_clr_all_bufs(ring_data: priv->ring_data + i);
1402	}
1403	}
1404
1405	void hns_nic_net_reset(struct net_device *ndev)
1406	{
1407	struct hns_nic_priv *priv = netdev_priv(dev: ndev);
1408	struct hnae_handle *handle = priv->ae_handle;
1409
1410	while (test_and_set_bit(nr: NIC_STATE_RESETTING, addr: &priv->state))
1411	usleep_range(min: 1000, max: 2000);
1412
1413	(void)hnae_reinit_handle(handle);
1414
1415	clear_bit(nr: NIC_STATE_RESETTING, addr: &priv->state);
1416	}
1417
1418	void hns_nic_net_reinit(struct net_device *netdev)
1419	{
1420	struct hns_nic_priv *priv = netdev_priv(dev: netdev);
1421	enum hnae_port_type type = priv->ae_handle->port_type;
1422
1423	netif_trans_update(dev: priv->netdev);
1424	while (test_and_set_bit(nr: NIC_STATE_REINITING, addr: &priv->state))
1425	usleep_range(min: 1000, max: 2000);
1426
1427	hns_nic_net_down(ndev: netdev);
1428
1429	/* Only do hns_nic_net_reset in debug mode
1430	* because of hardware limitation.
1431	*/
1432	if (type == HNAE_PORT_DEBUG)
1433	hns_nic_net_reset(ndev: netdev);
1434
1435	(void)hns_nic_net_up(ndev: netdev);
1436	clear_bit(nr: NIC_STATE_REINITING, addr: &priv->state);
1437	}
1438
1439	static int hns_nic_net_open(struct net_device *ndev)
1440	{
1441	struct hns_nic_priv *priv = netdev_priv(dev: ndev);
1442	struct hnae_handle *h = priv->ae_handle;
1443	int ret;
1444
1445	if (test_bit(NIC_STATE_TESTING, &priv->state))
1446	return -EBUSY;
1447
1448	priv->link = 0;
1449	netif_carrier_off(dev: ndev);
1450
1451	ret = netif_set_real_num_tx_queues(dev: ndev, txq: h->q_num);
1452	if (ret < 0) {
1453	netdev_err(dev: ndev, format: "netif_set_real_num_tx_queues fail, ret=%d!\n",
1454	ret);
1455	return ret;
1456	}
1457
1458	ret = netif_set_real_num_rx_queues(dev: ndev, rxq: h->q_num);
1459	if (ret < 0) {
1460	netdev_err(dev: ndev,
1461	format: "netif_set_real_num_rx_queues fail, ret=%d!\n", ret);
1462	return ret;
1463	}
1464
1465	ret = hns_nic_net_up(ndev);
1466	if (ret) {
1467	netdev_err(dev: ndev,
1468	format: "hns net up fail, ret=%d!\n", ret);
1469	return ret;
1470	}
1471
1472	return 0;
1473	}
1474
1475	static int hns_nic_net_stop(struct net_device *ndev)
1476	{
1477	hns_nic_net_down(ndev);
1478
1479	return 0;
1480	}
1481
1482	static void hns_tx_timeout_reset(struct hns_nic_priv *priv);
1483	#define HNS_TX_TIMEO_LIMIT (40 * HZ)
1484	static void hns_nic_net_timeout(struct net_device *ndev, unsigned int txqueue)
1485	{
1486	struct hns_nic_priv *priv = netdev_priv(dev: ndev);
1487
1488	if (ndev->watchdog_timeo < HNS_TX_TIMEO_LIMIT) {
1489	ndev->watchdog_timeo *= 2;
1490	netdev_info(dev: ndev, format: "watchdog_timo changed to %d.\n",
1491	ndev->watchdog_timeo);
1492	} else {
1493	ndev->watchdog_timeo = HNS_NIC_TX_TIMEOUT;
1494	hns_tx_timeout_reset(priv);
1495	}
1496	}
1497
1498	static netdev_tx_t hns_nic_net_xmit(struct sk_buff *skb,
1499	struct net_device *ndev)
1500	{
1501	struct hns_nic_priv *priv = netdev_priv(dev: ndev);
1502
1503	assert(skb->queue_mapping < priv->ae_handle->q_num);
1504
1505	return hns_nic_net_xmit_hw(ndev, skb,
1506	ring_data: &tx_ring_data(priv, skb->queue_mapping));
1507	}
1508
1509	static void hns_nic_drop_rx_fetch(struct hns_nic_ring_data *ring_data,
1510	struct sk_buff *skb)
1511	{
1512	dev_kfree_skb_any(skb);
1513	}
1514
1515	#define HNS_LB_TX_RING 0
1516	static struct sk_buff *hns_assemble_skb(struct net_device *ndev)
1517	{
1518	struct sk_buff *skb;
1519	struct ethhdr *ethhdr;
1520	int frame_len;
1521
1522	/* allocate test skb */
1523	skb = alloc_skb(size: 64, GFP_KERNEL);
1524	if (!skb)
1525	return NULL;
1526
1527	skb_put(skb, len: 64);
1528	skb->dev = ndev;
1529	memset(skb->data, 0xFF, skb->len);
1530
1531	/* must be tcp/ip package */
1532	ethhdr = (struct ethhdr *)skb->data;
1533	ethhdr->h_proto = htons(ETH_P_IP);
1534
1535	frame_len = skb->len & (~1ul);
1536	memset(&skb->data[frame_len / 2], 0xAA,
1537	frame_len / 2 - 1);
1538
1539	skb->queue_mapping = HNS_LB_TX_RING;
1540
1541	return skb;
1542	}
1543
1544	static int hns_enable_serdes_lb(struct net_device *ndev)
1545	{
1546	struct hns_nic_priv *priv = netdev_priv(dev: ndev);
1547	struct hnae_handle *h = priv->ae_handle;
1548	struct hnae_ae_ops *ops = h->dev->ops;
1549	int speed, duplex;
1550	int ret;
1551
1552	ret = ops->set_loopback(h, MAC_INTERNALLOOP_SERDES, 1);
1553	if (ret)
1554	return ret;
1555
1556	ret = ops->start ? ops->start(h) : 0;
1557	if (ret)
1558	return ret;
1559
1560	/* link adjust duplex*/
1561	if (h->phy_if != PHY_INTERFACE_MODE_XGMII)
1562	speed = 1000;
1563	else
1564	speed = 10000;
1565	duplex = 1;
1566
1567	ops->adjust_link(h, speed, duplex);
1568
1569	/* wait h/w ready */
1570	mdelay(300);
1571
1572	return 0;
1573	}
1574
1575	static void hns_disable_serdes_lb(struct net_device *ndev)
1576	{
1577	struct hns_nic_priv *priv = netdev_priv(dev: ndev);
1578	struct hnae_handle *h = priv->ae_handle;
1579	struct hnae_ae_ops *ops = h->dev->ops;
1580
1581	ops->stop(h);
1582	ops->set_loopback(h, MAC_INTERNALLOOP_SERDES, 0);
1583	}
1584
1585	/**
1586	*hns_nic_clear_all_rx_fetch - clear the chip fetched descriptions. The
1587	*function as follows:
1588	* 1. if one rx ring has found the page_offset is not equal 0 between head
1589	* and tail, it means that the chip fetched the wrong descs for the ring
1590	* which buffer size is 4096.
1591	* 2. we set the chip serdes loopback and set rss indirection to the ring.
1592	* 3. construct 64-bytes ip broadcast packages, wait the associated rx ring
1593	* receiving all packages and it will fetch new descriptions.
1594	* 4. recover to the original state.
1595	*
1596	*@ndev: net device
1597	*/
1598	static int hns_nic_clear_all_rx_fetch(struct net_device *ndev)
1599	{
1600	struct hns_nic_priv *priv = netdev_priv(dev: ndev);
1601	struct hnae_handle *h = priv->ae_handle;
1602	struct hnae_ae_ops *ops = h->dev->ops;
1603	struct hns_nic_ring_data *rd;
1604	struct hnae_ring *ring;
1605	struct sk_buff *skb;
1606	u32 *org_indir;
1607	u32 *cur_indir;
1608	int indir_size;
1609	int head, tail;
1610	int fetch_num;
1611	int i, j;
1612	bool found;
1613	int retry_times;
1614	int ret = 0;
1615
1616	/* alloc indir memory */
1617	indir_size = ops->get_rss_indir_size(h) * sizeof(*org_indir);
1618	org_indir = kzalloc(size: indir_size, GFP_KERNEL);
1619	if (!org_indir)
1620	return -ENOMEM;
1621
1622	/* store the original indirection */
1623	ops->get_rss(h, org_indir, NULL, NULL);
1624
1625	cur_indir = kzalloc(size: indir_size, GFP_KERNEL);
1626	if (!cur_indir) {
1627	ret = -ENOMEM;
1628	goto cur_indir_alloc_err;
1629	}
1630
1631	/* set loopback */
1632	if (hns_enable_serdes_lb(ndev)) {
1633	ret = -EINVAL;
1634	goto enable_serdes_lb_err;
1635	}
1636
1637	/* foreach every rx ring to clear fetch desc */
1638	for (i = 0; i < h->q_num; i++) {
1639	ring = &h->qs[i]->rx_ring;
1640	head = readl_relaxed(ring->io_base + RCB_REG_HEAD);
1641	tail = readl_relaxed(ring->io_base + RCB_REG_TAIL);
1642	found = false;
1643	fetch_num = ring_dist(ring, begin: head, end: tail);
1644
1645	while (head != tail) {
1646	if (ring->desc_cb[head].page_offset != 0) {
1647	found = true;
1648	break;
1649	}
1650
1651	head++;
1652	if (head == ring->desc_num)
1653	head = 0;
1654	}
1655
1656	if (found) {
1657	for (j = 0; j < indir_size / sizeof(*org_indir); j++)
1658	cur_indir[j] = i;
1659	ops->set_rss(h, cur_indir, NULL, 0);
1660
1661	for (j = 0; j < fetch_num; j++) {
1662	/* alloc one skb and init */
1663	skb = hns_assemble_skb(ndev);
1664	if (!skb) {
1665	ret = -ENOMEM;
1666	goto out;
1667	}
1668	rd = &tx_ring_data(priv, skb->queue_mapping);
1669	hns_nic_net_xmit_hw(ndev, skb, ring_data: rd);
1670
1671	retry_times = 0;
1672	while (retry_times++ < 10) {
1673	mdelay(10);
1674	/* clean rx */
1675	rd = &rx_ring_data(priv, i);
1676	if (rd->poll_one(rd, fetch_num,
1677	hns_nic_drop_rx_fetch))
1678	break;
1679	}
1680
1681	retry_times = 0;
1682	while (retry_times++ < 10) {
1683	mdelay(10);
1684	/* clean tx ring 0 send package */
1685	rd = &tx_ring_data(priv,
1686	HNS_LB_TX_RING);
1687	if (rd->poll_one(rd, fetch_num, NULL))
1688	break;
1689	}
1690	}
1691	}
1692	}
1693
1694	out:
1695	/* restore everything */
1696	ops->set_rss(h, org_indir, NULL, 0);
1697	hns_disable_serdes_lb(ndev);
1698	enable_serdes_lb_err:
1699	kfree(objp: cur_indir);
1700	cur_indir_alloc_err:
1701	kfree(objp: org_indir);
1702
1703	return ret;
1704	}
1705
1706	static int hns_nic_change_mtu(struct net_device *ndev, int new_mtu)
1707	{
1708	struct hns_nic_priv *priv = netdev_priv(dev: ndev);
1709	struct hnae_handle *h = priv->ae_handle;
1710	bool if_running = netif_running(dev: ndev);
1711	int ret;
1712
1713	/* MTU < 68 is an error and causes problems on some kernels */
1714	if (new_mtu < 68)
1715	return -EINVAL;
1716
1717	/* MTU no change */
1718	if (new_mtu == ndev->mtu)
1719	return 0;
1720
1721	if (!h->dev->ops->set_mtu)
1722	return -ENOTSUPP;
1723
1724	if (if_running) {
1725	(void)hns_nic_net_stop(ndev);
1726	msleep(msecs: 100);
1727	}
1728
1729	if (priv->enet_ver != AE_VERSION_1 &&
1730	ndev->mtu <= BD_SIZE_2048_MAX_MTU &&
1731	new_mtu > BD_SIZE_2048_MAX_MTU) {
1732	/* update desc */
1733	hnae_reinit_all_ring_desc(h);
1734
1735	/* clear the package which the chip has fetched */
1736	ret = hns_nic_clear_all_rx_fetch(ndev);
1737
1738	/* the page offset must be consist with desc */
1739	hnae_reinit_all_ring_page_off(h);
1740
1741	if (ret) {
1742	netdev_err(dev: ndev, format: "clear the fetched desc fail\n");
1743	goto out;
1744	}
1745	}
1746
1747	ret = h->dev->ops->set_mtu(h, new_mtu);
1748	if (ret) {
1749	netdev_err(dev: ndev, format: "set mtu fail, return value %d\n",
1750	ret);
1751	goto out;
1752	}
1753
1754	/* finally, set new mtu to netdevice */
1755	ndev->mtu = new_mtu;
1756
1757	out:
1758	if (if_running) {
1759	if (hns_nic_net_open(ndev)) {
1760	netdev_err(dev: ndev, format: "hns net open fail\n");
1761	ret = -EINVAL;
1762	}
1763	}
1764
1765	return ret;
1766	}
1767
1768	static int hns_nic_set_features(struct net_device *netdev,
1769	netdev_features_t features)
1770	{
1771	struct hns_nic_priv *priv = netdev_priv(dev: netdev);
1772
1773	switch (priv->enet_ver) {
1774	case AE_VERSION_1:
1775	if (features & (NETIF_F_TSO | NETIF_F_TSO6))
1776	netdev_info(dev: netdev, format: "enet v1 do not support tso!\n");
1777	break;
1778	default:
1779	if (features & (NETIF_F_TSO | NETIF_F_TSO6)) {
1780	priv->ops.fill_desc = fill_tso_desc;
1781	priv->ops.maybe_stop_tx = hns_nic_maybe_stop_tso;
1782	/* The chip only support 7*4096 */
1783	netif_set_tso_max_size(dev: netdev, size: 7 * 4096);
1784	} else {
1785	priv->ops.fill_desc = fill_v2_desc;
1786	priv->ops.maybe_stop_tx = hns_nic_maybe_stop_tx;
1787	}
1788	break;
1789	}
1790	netdev->features = features;
1791	return 0;
1792	}
1793
1794	static netdev_features_t hns_nic_fix_features(
1795	struct net_device *netdev, netdev_features_t features)
1796	{
1797	struct hns_nic_priv *priv = netdev_priv(dev: netdev);
1798
1799	switch (priv->enet_ver) {
1800	case AE_VERSION_1:
1801	features &= ~(NETIF_F_TSO | NETIF_F_TSO6 |
1802	NETIF_F_HW_VLAN_CTAG_FILTER);
1803	break;
1804	default:
1805	break;
1806	}
1807	return features;
1808	}
1809
1810	static int hns_nic_uc_sync(struct net_device *netdev, const unsigned char *addr)
1811	{
1812	struct hns_nic_priv *priv = netdev_priv(dev: netdev);
1813	struct hnae_handle *h = priv->ae_handle;
1814
1815	if (h->dev->ops->add_uc_addr)
1816	return h->dev->ops->add_uc_addr(h, addr);
1817
1818	return 0;
1819	}
1820
1821	static int hns_nic_uc_unsync(struct net_device *netdev,
1822	const unsigned char *addr)
1823	{
1824	struct hns_nic_priv *priv = netdev_priv(dev: netdev);
1825	struct hnae_handle *h = priv->ae_handle;
1826
1827	if (h->dev->ops->rm_uc_addr)
1828	return h->dev->ops->rm_uc_addr(h, addr);
1829
1830	return 0;
1831	}
1832
1833	/**
1834	* hns_set_multicast_list - set mutl mac address
1835	* @ndev: net device
1836	*
1837	* return void
1838	*/
1839	static void hns_set_multicast_list(struct net_device *ndev)
1840	{
1841	struct hns_nic_priv *priv = netdev_priv(dev: ndev);
1842	struct hnae_handle *h = priv->ae_handle;
1843	struct netdev_hw_addr *ha = NULL;
1844
1845	if (!h) {
1846	netdev_err(dev: ndev, format: "hnae handle is null\n");
1847	return;
1848	}
1849
1850	if (h->dev->ops->clr_mc_addr)
1851	if (h->dev->ops->clr_mc_addr(h))
1852	netdev_err(dev: ndev, format: "clear multicast address fail\n");
1853
1854	if (h->dev->ops->set_mc_addr) {
1855	netdev_for_each_mc_addr(ha, ndev)
1856	if (h->dev->ops->set_mc_addr(h, ha->addr))
1857	netdev_err(dev: ndev, format: "set multicast fail\n");
1858	}
1859	}
1860
1861	static void hns_nic_set_rx_mode(struct net_device *ndev)
1862	{
1863	struct hns_nic_priv *priv = netdev_priv(dev: ndev);
1864	struct hnae_handle *h = priv->ae_handle;
1865
1866	if (h->dev->ops->set_promisc_mode) {
1867	if (ndev->flags & IFF_PROMISC)
1868	h->dev->ops->set_promisc_mode(h, 1);
1869	else
1870	h->dev->ops->set_promisc_mode(h, 0);
1871	}
1872
1873	hns_set_multicast_list(ndev);
1874
1875	if (__dev_uc_sync(dev: ndev, sync: hns_nic_uc_sync, unsync: hns_nic_uc_unsync))
1876	netdev_err(dev: ndev, format: "sync uc address fail\n");
1877	}
1878
1879	static void hns_nic_get_stats64(struct net_device *ndev,
1880	struct rtnl_link_stats64 *stats)
1881	{
1882	int idx;
1883	u64 tx_bytes = 0;
1884	u64 rx_bytes = 0;
1885	u64 tx_pkts = 0;
1886	u64 rx_pkts = 0;
1887	struct hns_nic_priv *priv = netdev_priv(dev: ndev);
1888	struct hnae_handle *h = priv->ae_handle;
1889
1890	for (idx = 0; idx < h->q_num; idx++) {
1891	tx_bytes += h->qs[idx]->tx_ring.stats.tx_bytes;
1892	tx_pkts += h->qs[idx]->tx_ring.stats.tx_pkts;
1893	rx_bytes += h->qs[idx]->rx_ring.stats.rx_bytes;
1894	rx_pkts += h->qs[idx]->rx_ring.stats.rx_pkts;
1895	}
1896
1897	stats->tx_bytes = tx_bytes;
1898	stats->tx_packets = tx_pkts;
1899	stats->rx_bytes = rx_bytes;
1900	stats->rx_packets = rx_pkts;
1901
1902	stats->rx_errors = ndev->stats.rx_errors;
1903	stats->multicast = ndev->stats.multicast;
1904	stats->rx_length_errors = ndev->stats.rx_length_errors;
1905	stats->rx_crc_errors = ndev->stats.rx_crc_errors;
1906	stats->rx_missed_errors = ndev->stats.rx_missed_errors;
1907
1908	stats->tx_errors = ndev->stats.tx_errors;
1909	stats->rx_dropped = ndev->stats.rx_dropped;
1910	stats->tx_dropped = ndev->stats.tx_dropped;
1911	stats->collisions = ndev->stats.collisions;
1912	stats->rx_over_errors = ndev->stats.rx_over_errors;
1913	stats->rx_frame_errors = ndev->stats.rx_frame_errors;
1914	stats->rx_fifo_errors = ndev->stats.rx_fifo_errors;
1915	stats->tx_aborted_errors = ndev->stats.tx_aborted_errors;
1916	stats->tx_carrier_errors = ndev->stats.tx_carrier_errors;
1917	stats->tx_fifo_errors = ndev->stats.tx_fifo_errors;
1918	stats->tx_heartbeat_errors = ndev->stats.tx_heartbeat_errors;
1919	stats->tx_window_errors = ndev->stats.tx_window_errors;
1920	stats->rx_compressed = ndev->stats.rx_compressed;
1921	stats->tx_compressed = ndev->stats.tx_compressed;
1922	}
1923
1924	static u16
1925	hns_nic_select_queue(struct net_device *ndev, struct sk_buff *skb,
1926	struct net_device *sb_dev)
1927	{
1928	struct ethhdr *eth_hdr = (struct ethhdr *)skb->data;
1929	struct hns_nic_priv *priv = netdev_priv(dev: ndev);
1930
1931	/* fix hardware broadcast/multicast packets queue loopback */
1932	if (!AE_IS_VER1(priv->enet_ver) &&
1933	is_multicast_ether_addr(addr: eth_hdr->h_dest))
1934	return 0;
1935	else
1936	return netdev_pick_tx(dev: ndev, skb, NULL);
1937	}
1938
1939	static const struct net_device_ops hns_nic_netdev_ops = {
1940	.ndo_open = hns_nic_net_open,
1941	.ndo_stop = hns_nic_net_stop,
1942	.ndo_start_xmit = hns_nic_net_xmit,
1943	.ndo_tx_timeout = hns_nic_net_timeout,
1944	.ndo_set_mac_address = hns_nic_net_set_mac_address,
1945	.ndo_change_mtu = hns_nic_change_mtu,
1946	.ndo_eth_ioctl = phy_do_ioctl_running,
1947	.ndo_set_features = hns_nic_set_features,
1948	.ndo_fix_features = hns_nic_fix_features,
1949	.ndo_get_stats64 = hns_nic_get_stats64,
1950	.ndo_set_rx_mode = hns_nic_set_rx_mode,
1951	.ndo_select_queue = hns_nic_select_queue,
1952	};
1953
1954	static void hns_nic_update_link_status(struct net_device *netdev)
1955	{
1956	struct hns_nic_priv *priv = netdev_priv(dev: netdev);
1957
1958	struct hnae_handle *h = priv->ae_handle;
1959
1960	if (h->phy_dev) {
1961	if (h->phy_if != PHY_INTERFACE_MODE_XGMII)
1962	return;
1963
1964	(void)genphy_read_status(phydev: h->phy_dev);
1965	}
1966	hns_nic_adjust_link(ndev: netdev);
1967	}
1968
1969	/* for dumping key regs*/
1970	static void hns_nic_dump(struct hns_nic_priv *priv)
1971	{
1972	struct hnae_handle *h = priv->ae_handle;
1973	struct hnae_ae_ops *ops = h->dev->ops;
1974	u32 *data, reg_num, i;
1975
1976	if (ops->get_regs_len && ops->get_regs) {
1977	reg_num = ops->get_regs_len(priv->ae_handle);
1978	reg_num = (reg_num + 3ul) & ~3ul;
1979	data = kcalloc(n: reg_num, size: sizeof(u32), GFP_KERNEL);
1980	if (data) {
1981	ops->get_regs(priv->ae_handle, data);
1982	for (i = 0; i < reg_num; i += 4)
1983	pr_info("0x%08x: 0x%08x 0x%08x 0x%08x 0x%08x\n",
1984	i, data[i], data[i + 1],
1985	data[i + 2], data[i + 3]);
1986	kfree(objp: data);
1987	}
1988	}
1989
1990	for (i = 0; i < h->q_num; i++) {
1991	pr_info("tx_queue%d_next_to_clean:%d\n",
1992	i, h->qs[i]->tx_ring.next_to_clean);
1993	pr_info("tx_queue%d_next_to_use:%d\n",
1994	i, h->qs[i]->tx_ring.next_to_use);
1995	pr_info("rx_queue%d_next_to_clean:%d\n",
1996	i, h->qs[i]->rx_ring.next_to_clean);
1997	pr_info("rx_queue%d_next_to_use:%d\n",
1998	i, h->qs[i]->rx_ring.next_to_use);
1999	}
2000	}
2001
2002	/* for resetting subtask */
2003	static void hns_nic_reset_subtask(struct hns_nic_priv *priv)
2004	{
2005	enum hnae_port_type type = priv->ae_handle->port_type;
2006
2007	if (!test_bit(NIC_STATE2_RESET_REQUESTED, &priv->state))
2008	return;
2009	clear_bit(nr: NIC_STATE2_RESET_REQUESTED, addr: &priv->state);
2010
2011	/* If we're already down, removing or resetting, just bail */
2012	if (test_bit(NIC_STATE_DOWN, &priv->state) ||
2013	test_bit(NIC_STATE_REMOVING, &priv->state) ||
2014	test_bit(NIC_STATE_RESETTING, &priv->state))
2015	return;
2016
2017	hns_nic_dump(priv);
2018	netdev_info(dev: priv->netdev, format: "try to reset %s port!\n",
2019	(type == HNAE_PORT_DEBUG ? "debug" : "service"));
2020
2021	rtnl_lock();
2022	/* put off any impending NetWatchDogTimeout */
2023	netif_trans_update(dev: priv->netdev);
2024	hns_nic_net_reinit(netdev: priv->netdev);
2025
2026	rtnl_unlock();
2027	}
2028
2029	/* for doing service complete*/
2030	static void hns_nic_service_event_complete(struct hns_nic_priv *priv)
2031	{
2032	WARN_ON(!test_bit(NIC_STATE_SERVICE_SCHED, &priv->state));
2033	/* make sure to commit the things */
2034	smp_mb__before_atomic();
2035	clear_bit(nr: NIC_STATE_SERVICE_SCHED, addr: &priv->state);
2036	}
2037
2038	static void hns_nic_service_task(struct work_struct *work)
2039	{
2040	struct hns_nic_priv *priv
2041	= container_of(work, struct hns_nic_priv, service_task);
2042	struct hnae_handle *h = priv->ae_handle;
2043
2044	hns_nic_reset_subtask(priv);
2045	hns_nic_update_link_status(netdev: priv->netdev);
2046	h->dev->ops->update_led_status(h);
2047	hns_nic_update_stats(netdev: priv->netdev);
2048
2049	hns_nic_service_event_complete(priv);
2050	}
2051
2052	static void hns_nic_task_schedule(struct hns_nic_priv *priv)
2053	{
2054	if (!test_bit(NIC_STATE_DOWN, &priv->state) &&
2055	!test_bit(NIC_STATE_REMOVING, &priv->state) &&
2056	!test_and_set_bit(nr: NIC_STATE_SERVICE_SCHED, addr: &priv->state))
2057	(void)schedule_work(work: &priv->service_task);
2058	}
2059
2060	static void hns_nic_service_timer(struct timer_list *t)
2061	{
2062	struct hns_nic_priv *priv = from_timer(priv, t, service_timer);
2063
2064	(void)mod_timer(timer: &priv->service_timer, expires: jiffies + SERVICE_TIMER_HZ);
2065
2066	hns_nic_task_schedule(priv);
2067	}
2068
2069	/**
2070	* hns_tx_timeout_reset - initiate reset due to Tx timeout
2071	* @priv: driver private struct
2072	**/
2073	static void hns_tx_timeout_reset(struct hns_nic_priv *priv)
2074	{
2075	/* Do the reset outside of interrupt context */
2076	if (!test_bit(NIC_STATE_DOWN, &priv->state)) {
2077	set_bit(nr: NIC_STATE2_RESET_REQUESTED, addr: &priv->state);
2078	netdev_warn(dev: priv->netdev,
2079	format: "initiating reset due to tx timeout(%llu,0x%lx)\n",
2080	priv->tx_timeout_count, priv->state);
2081	priv->tx_timeout_count++;
2082	hns_nic_task_schedule(priv);
2083	}
2084	}
2085
2086	static int hns_nic_init_ring_data(struct hns_nic_priv *priv)
2087	{
2088	struct hnae_handle *h = priv->ae_handle;
2089	struct hns_nic_ring_data *rd;
2090	bool is_ver1 = AE_IS_VER1(priv->enet_ver);
2091	int i;
2092
2093	if (h->q_num > NIC_MAX_Q_PER_VF) {
2094	netdev_err(dev: priv->netdev, format: "too much queue (%d)\n", h->q_num);
2095	return -EINVAL;
2096	}
2097
2098	priv->ring_data = kzalloc(array3_size(h->q_num,
2099	sizeof(*priv->ring_data), 2),
2100	GFP_KERNEL);
2101	if (!priv->ring_data)
2102	return -ENOMEM;
2103
2104	for (i = 0; i < h->q_num; i++) {
2105	rd = &priv->ring_data[i];
2106	rd->queue_index = i;
2107	rd->ring = &h->qs[i]->tx_ring;
2108	rd->poll_one = hns_nic_tx_poll_one;
2109	rd->fini_process = is_ver1 ? hns_nic_tx_fini_pro :
2110	hns_nic_tx_fini_pro_v2;
2111
2112	netif_napi_add(dev: priv->netdev, napi: &rd->napi, poll: hns_nic_common_poll);
2113	rd->ring->irq_init_flag = RCB_IRQ_NOT_INITED;
2114	}
2115	for (i = h->q_num; i < h->q_num * 2; i++) {
2116	rd = &priv->ring_data[i];
2117	rd->queue_index = i - h->q_num;
2118	rd->ring = &h->qs[i - h->q_num]->rx_ring;
2119	rd->poll_one = hns_nic_rx_poll_one;
2120	rd->ex_process = hns_nic_rx_up_pro;
2121	rd->fini_process = is_ver1 ? hns_nic_rx_fini_pro :
2122	hns_nic_rx_fini_pro_v2;
2123
2124	netif_napi_add(dev: priv->netdev, napi: &rd->napi, poll: hns_nic_common_poll);
2125	rd->ring->irq_init_flag = RCB_IRQ_NOT_INITED;
2126	}
2127
2128	return 0;
2129	}
2130
2131	static void hns_nic_uninit_ring_data(struct hns_nic_priv *priv)
2132	{
2133	struct hnae_handle *h = priv->ae_handle;
2134	int i;
2135
2136	for (i = 0; i < h->q_num * 2; i++) {
2137	netif_napi_del(napi: &priv->ring_data[i].napi);
2138	if (priv->ring_data[i].ring->irq_init_flag == RCB_IRQ_INITED) {
2139	(void)irq_set_affinity_hint(
2140	irq: priv->ring_data[i].ring->irq,
2141	NULL);
2142	free_irq(priv->ring_data[i].ring->irq,
2143	&priv->ring_data[i]);
2144	}
2145
2146	priv->ring_data[i].ring->irq_init_flag = RCB_IRQ_NOT_INITED;
2147	}
2148	kfree(objp: priv->ring_data);
2149	}
2150
2151	static void hns_nic_set_priv_ops(struct net_device *netdev)
2152	{
2153	struct hns_nic_priv *priv = netdev_priv(dev: netdev);
2154	struct hnae_handle *h = priv->ae_handle;
2155
2156	if (AE_IS_VER1(priv->enet_ver)) {
2157	priv->ops.fill_desc = fill_desc;
2158	priv->ops.get_rxd_bnum = get_rx_desc_bnum;
2159	priv->ops.maybe_stop_tx = hns_nic_maybe_stop_tx;
2160	} else {
2161	priv->ops.get_rxd_bnum = get_v2rx_desc_bnum;
2162	if ((netdev->features & NETIF_F_TSO) ||
2163	(netdev->features & NETIF_F_TSO6)) {
2164	priv->ops.fill_desc = fill_tso_desc;
2165	priv->ops.maybe_stop_tx = hns_nic_maybe_stop_tso;
2166	/* This chip only support 7*4096 */
2167	netif_set_tso_max_size(dev: netdev, size: 7 * 4096);
2168	} else {
2169	priv->ops.fill_desc = fill_v2_desc;
2170	priv->ops.maybe_stop_tx = hns_nic_maybe_stop_tx;
2171	}
2172	/* enable tso when init
2173	* control tso on/off through TSE bit in bd
2174	*/
2175	h->dev->ops->set_tso_stats(h, 1);
2176	}
2177	}
2178
2179	static int hns_nic_try_get_ae(struct net_device *ndev)
2180	{
2181	struct hns_nic_priv *priv = netdev_priv(dev: ndev);
2182	struct hnae_handle *h;
2183	int ret;
2184
2185	h = hnae_get_handle(owner_dev: &priv->netdev->dev,
2186	fwnode: priv->fwnode, port_id: priv->port_id, NULL);
2187	if (IS_ERR_OR_NULL(ptr: h)) {
2188	ret = -ENODEV;
2189	dev_dbg(priv->dev, "has not handle, register notifier!\n");
2190	goto out;
2191	}
2192	priv->ae_handle = h;
2193
2194	ret = hns_nic_init_phy(ndev, h);
2195	if (ret) {
2196	dev_err(priv->dev, "probe phy device fail!\n");
2197	goto out_init_phy;
2198	}
2199
2200	ret = hns_nic_init_ring_data(priv);
2201	if (ret) {
2202	ret = -ENOMEM;
2203	goto out_init_ring_data;
2204	}
2205
2206	hns_nic_set_priv_ops(netdev: ndev);
2207
2208	ret = register_netdev(dev: ndev);
2209	if (ret) {
2210	dev_err(priv->dev, "probe register netdev fail!\n");
2211	goto out_reg_ndev_fail;
2212	}
2213	return 0;
2214
2215	out_reg_ndev_fail:
2216	hns_nic_uninit_ring_data(priv);
2217	priv->ring_data = NULL;
2218	out_init_phy:
2219	out_init_ring_data:
2220	hnae_put_handle(handle: priv->ae_handle);
2221	priv->ae_handle = NULL;
2222	out:
2223	return ret;
2224	}
2225
2226	static int hns_nic_notifier_action(struct notifier_block *nb,
2227	unsigned long action, void *data)
2228	{
2229	struct hns_nic_priv *priv =
2230	container_of(nb, struct hns_nic_priv, notifier_block);
2231
2232	assert(action == HNAE_AE_REGISTER);
2233
2234	if (!hns_nic_try_get_ae(ndev: priv->netdev)) {
2235	hnae_unregister_notifier(nb: &priv->notifier_block);
2236	priv->notifier_block.notifier_call = NULL;
2237	}
2238	return 0;
2239	}
2240
2241	static int hns_nic_dev_probe(struct platform_device *pdev)
2242	{
2243	struct device *dev = &pdev->dev;
2244	struct net_device *ndev;
2245	struct hns_nic_priv *priv;
2246	u32 port_id;
2247	int ret;
2248
2249	ndev = alloc_etherdev_mq(sizeof(struct hns_nic_priv), NIC_MAX_Q_PER_VF);
2250	if (!ndev)
2251	return -ENOMEM;
2252
2253	platform_set_drvdata(pdev, data: ndev);
2254
2255	priv = netdev_priv(dev: ndev);
2256	priv->dev = dev;
2257	priv->netdev = ndev;
2258
2259	if (dev_of_node(dev)) {
2260	struct device_node *ae_node;
2261
2262	if (of_device_is_compatible(device: dev->of_node,
2263	"hisilicon,hns-nic-v1"))
2264	priv->enet_ver = AE_VERSION_1;
2265	else
2266	priv->enet_ver = AE_VERSION_2;
2267
2268	ae_node = of_parse_phandle(np: dev->of_node, phandle_name: "ae-handle", index: 0);
2269	if (!ae_node) {
2270	ret = -ENODEV;
2271	dev_err(dev, "not find ae-handle\n");
2272	goto out_read_prop_fail;
2273	}
2274	priv->fwnode = &ae_node->fwnode;
2275	} else if (is_acpi_node(fwnode: dev->fwnode)) {
2276	struct fwnode_reference_args args;
2277
2278	if (acpi_dev_found(hid: hns_enet_acpi_match[0].id))
2279	priv->enet_ver = AE_VERSION_1;
2280	else if (acpi_dev_found(hid: hns_enet_acpi_match[1].id))
2281	priv->enet_ver = AE_VERSION_2;
2282	else {
2283	ret = -ENXIO;
2284	goto out_read_prop_fail;
2285	}
2286
2287	/* try to find port-idx-in-ae first */
2288	ret = acpi_node_get_property_reference(fwnode: dev->fwnode,
2289	name: "ae-handle", index: 0, args: &args);
2290	if (ret) {
2291	dev_err(dev, "not find ae-handle\n");
2292	goto out_read_prop_fail;
2293	}
2294	if (!is_acpi_device_node(fwnode: args.fwnode)) {
2295	ret = -EINVAL;
2296	goto out_read_prop_fail;
2297	}
2298	priv->fwnode = args.fwnode;
2299	} else {
2300	dev_err(dev, "cannot read cfg data from OF or acpi\n");
2301	ret = -ENXIO;
2302	goto out_read_prop_fail;
2303	}
2304
2305	ret = device_property_read_u32(dev, propname: "port-idx-in-ae", val: &port_id);
2306	if (ret) {
2307	/* only for old code compatible */
2308	ret = device_property_read_u32(dev, propname: "port-id", val: &port_id);
2309	if (ret)
2310	goto out_read_prop_fail;
2311	/* for old dts, we need to caculate the port offset */
2312	port_id = port_id < HNS_SRV_OFFSET ? port_id + HNS_DEBUG_OFFSET
2313	: port_id - HNS_SRV_OFFSET;
2314	}
2315	priv->port_id = port_id;
2316
2317	hns_init_mac_addr(ndev);
2318
2319	ndev->watchdog_timeo = HNS_NIC_TX_TIMEOUT;
2320	ndev->priv_flags |= IFF_UNICAST_FLT;
2321	ndev->netdev_ops = &hns_nic_netdev_ops;
2322	hns_ethtool_set_ops(ndev);
2323
2324	ndev->features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
2325	NETIF_F_RXCSUM | NETIF_F_SG | NETIF_F_GSO |
2326	NETIF_F_GRO;
2327	ndev->vlan_features |=
2328	NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM | NETIF_F_RXCSUM;
2329	ndev->vlan_features |= NETIF_F_SG | NETIF_F_GSO | NETIF_F_GRO;
2330
2331	/* MTU range: 68 - 9578 (v1) or 9706 (v2) */
2332	ndev->min_mtu = MAC_MIN_MTU;
2333	switch (priv->enet_ver) {
2334	case AE_VERSION_2:
2335	ndev->features |= NETIF_F_TSO | NETIF_F_TSO6 | NETIF_F_NTUPLE;
2336	ndev->hw_features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
2337	NETIF_F_RXCSUM | NETIF_F_SG | NETIF_F_GSO |
2338	NETIF_F_GRO | NETIF_F_TSO | NETIF_F_TSO6;
2339	ndev->vlan_features |= NETIF_F_TSO | NETIF_F_TSO6;
2340	ndev->max_mtu = MAC_MAX_MTU_V2 -
2341	(ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN);
2342	break;
2343	default:
2344	ndev->max_mtu = MAC_MAX_MTU -
2345	(ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN);
2346	break;
2347	}
2348
2349	SET_NETDEV_DEV(ndev, dev);
2350
2351	if (!dma_set_mask_and_coherent(dev, DMA_BIT_MASK(64)))
2352	dev_dbg(dev, "set mask to 64bit\n");
2353	else
2354	dev_err(dev, "set mask to 64bit fail!\n");
2355
2356	/* carrier off reporting is important to ethtool even BEFORE open */
2357	netif_carrier_off(dev: ndev);
2358
2359	timer_setup(&priv->service_timer, hns_nic_service_timer, 0);
2360	INIT_WORK(&priv->service_task, hns_nic_service_task);
2361
2362	set_bit(nr: NIC_STATE_SERVICE_INITED, addr: &priv->state);
2363	clear_bit(nr: NIC_STATE_SERVICE_SCHED, addr: &priv->state);
2364	set_bit(nr: NIC_STATE_DOWN, addr: &priv->state);
2365
2366	if (hns_nic_try_get_ae(ndev: priv->netdev)) {
2367	priv->notifier_block.notifier_call = hns_nic_notifier_action;
2368	ret = hnae_register_notifier(nb: &priv->notifier_block);
2369	if (ret) {
2370	dev_err(dev, "register notifier fail!\n");
2371	goto out_notify_fail;
2372	}
2373	dev_dbg(dev, "has not handle, register notifier!\n");
2374	}
2375
2376	return 0;
2377
2378	out_notify_fail:
2379	(void)cancel_work_sync(work: &priv->service_task);
2380	out_read_prop_fail:
2381	/* safe for ACPI FW */
2382	of_node_put(to_of_node(priv->fwnode));
2383	free_netdev(dev: ndev);
2384	return ret;
2385	}
2386
2387	static void hns_nic_dev_remove(struct platform_device *pdev)
2388	{
2389	struct net_device *ndev = platform_get_drvdata(pdev);
2390	struct hns_nic_priv *priv = netdev_priv(dev: ndev);
2391
2392	if (ndev->reg_state != NETREG_UNINITIALIZED)
2393	unregister_netdev(dev: ndev);
2394
2395	if (priv->ring_data)
2396	hns_nic_uninit_ring_data(priv);
2397	priv->ring_data = NULL;
2398
2399	if (ndev->phydev)
2400	phy_disconnect(phydev: ndev->phydev);
2401
2402	if (!IS_ERR_OR_NULL(ptr: priv->ae_handle))
2403	hnae_put_handle(handle: priv->ae_handle);
2404	priv->ae_handle = NULL;
2405	if (priv->notifier_block.notifier_call)
2406	hnae_unregister_notifier(nb: &priv->notifier_block);
2407	priv->notifier_block.notifier_call = NULL;
2408
2409	set_bit(nr: NIC_STATE_REMOVING, addr: &priv->state);
2410	(void)cancel_work_sync(work: &priv->service_task);
2411
2412	/* safe for ACPI FW */
2413	of_node_put(to_of_node(priv->fwnode));
2414
2415	free_netdev(dev: ndev);
2416	}
2417
2418	static const struct of_device_id hns_enet_of_match[] = {
2419	{.compatible = "hisilicon,hns-nic-v1",},
2420	{.compatible = "hisilicon,hns-nic-v2",},
2421	{},
2422	};
2423
2424	MODULE_DEVICE_TABLE(of, hns_enet_of_match);
2425
2426	static struct platform_driver hns_nic_dev_driver = {
2427	.driver = {
2428	.name = "hns-nic",
2429	.of_match_table = hns_enet_of_match,
2430	.acpi_match_table = ACPI_PTR(hns_enet_acpi_match),
2431	},
2432	.probe = hns_nic_dev_probe,
2433	.remove_new = hns_nic_dev_remove,
2434	};
2435
2436	module_platform_driver(hns_nic_dev_driver);
2437
2438	MODULE_DESCRIPTION("HISILICON HNS Ethernet driver");
2439	MODULE_AUTHOR("Hisilicon, Inc.");
2440	MODULE_LICENSE("GPL");
2441	MODULE_ALIAS("platform:hns-nic");
2442