2 * Copyright (c) 2014-2015 Hisilicon Limited.
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.
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>
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>
25 #include "hns_dsaf_mac.h"
27 #define NIC_MAX_Q_PER_VF 16
28 #define HNS_NIC_TX_TIMEOUT (5 * HZ)
30 #define SERVICE_TIMER_HZ (1 * HZ)
32 #define NIC_TX_CLEAN_MAX_NUM 256
33 #define NIC_RX_CLEAN_MAX_NUM 64
35 #define RCB_IRQ_NOT_INITED 0
36 #define RCB_IRQ_INITED 1
37 #define HNS_BUFFER_SIZE_2048 2048
39 #define BD_MAX_SEND_SIZE 8191
40 #define SKB_TMP_LEN(SKB) \
41 (((SKB)->transport_header - (SKB)->mac_header) + tcp_hdrlen(SKB))
43 static void fill_v2_desc_hw(struct hnae_ring *ring, void *priv, int size,
44 int send_sz, dma_addr_t dma, int frag_end,
45 int buf_num, enum hns_desc_type type, int mtu)
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];
50 struct ipv6hdr *ipv6hdr;
62 desc_cb->length = size;
66 desc->addr = cpu_to_le64(dma);
67 desc->tx.send_size = cpu_to_le16((u16)send_sz);
69 /* config bd buffer end */
70 hnae_set_bit(rrcfv, HNSV2_TXD_VLD_B, 1);
71 hnae_set_field(bn_pid, HNSV2_TXD_BUFNUM_M, 0, buf_num - 1);
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);
77 if (type == DESC_TYPE_SKB) {
78 skb = (struct sk_buff *)priv;
80 if (skb->ip_summed == CHECKSUM_PARTIAL) {
81 skb_reset_mac_len(skb);
82 protocol = skb->protocol;
85 if (protocol == htons(ETH_P_8021Q)) {
86 ip_offset += VLAN_HLEN;
87 protocol = vlan_get_protocol(skb);
88 skb->protocol = protocol;
91 if (skb->protocol == htons(ETH_P_IP)) {
93 hnae_set_bit(rrcfv, HNSV2_TXD_L3CS_B, 1);
94 hnae_set_bit(rrcfv, HNSV2_TXD_L4CS_B, 1);
96 /* check for tcp/udp header */
97 if (iphdr->protocol == IPPROTO_TCP &&
101 l4_len = tcp_hdrlen(skb);
102 mss = skb_shinfo(skb)->gso_size;
103 paylen = skb->len - SKB_TMP_LEN(skb);
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);
110 /* check for tcp/udp header */
111 if (ipv6hdr->nexthdr == IPPROTO_TCP &&
112 skb_is_gso(skb) && skb_is_gso_v6(skb)) {
115 l4_len = tcp_hdrlen(skb);
116 mss = skb_shinfo(skb)->gso_size;
117 paylen = skb->len - SKB_TMP_LEN(skb);
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);
128 hnae_set_bit(rrcfv, HNSV2_TXD_FE_B, frag_end);
130 desc->tx.bn_pid = bn_pid;
131 desc->tx.ra_ri_cs_fe_vld = rrcfv;
133 ring_ptr_move_fw(ring, next_to_use);
136 static void fill_v2_desc(struct hnae_ring *ring, void *priv,
137 int size, dma_addr_t dma, int frag_end,
138 int buf_num, enum hns_desc_type type, int mtu)
140 fill_v2_desc_hw(ring, priv, size, size, dma, frag_end,
144 static const struct acpi_device_id hns_enet_acpi_match[] = {
149 MODULE_DEVICE_TABLE(acpi, hns_enet_acpi_match);
151 static void fill_desc(struct hnae_ring *ring, void *priv,
152 int size, dma_addr_t dma, int frag_end,
153 int buf_num, enum hns_desc_type type, int mtu)
155 struct hnae_desc *desc = &ring->desc[ring->next_to_use];
156 struct hnae_desc_cb *desc_cb = &ring->desc_cb[ring->next_to_use];
160 u32 asid_bufnum_pid = 0;
161 u32 flag_ipoffset = 0;
163 desc_cb->priv = priv;
164 desc_cb->length = size;
166 desc_cb->type = type;
168 desc->addr = cpu_to_le64(dma);
169 desc->tx.send_size = cpu_to_le16((u16)size);
171 /*config bd buffer end */
172 flag_ipoffset |= 1 << HNS_TXD_VLD_B;
174 asid_bufnum_pid |= buf_num << HNS_TXD_BUFNUM_S;
176 if (type == DESC_TYPE_SKB) {
177 skb = (struct sk_buff *)priv;
179 if (skb->ip_summed == CHECKSUM_PARTIAL) {
180 protocol = skb->protocol;
181 ip_offset = ETH_HLEN;
183 /*if it is a SW VLAN check the next protocol*/
184 if (protocol == htons(ETH_P_8021Q)) {
185 ip_offset += VLAN_HLEN;
186 protocol = vlan_get_protocol(skb);
187 skb->protocol = protocol;
190 if (skb->protocol == htons(ETH_P_IP)) {
191 flag_ipoffset |= 1 << HNS_TXD_L3CS_B;
192 /* check for tcp/udp header */
193 flag_ipoffset |= 1 << HNS_TXD_L4CS_B;
195 } else if (skb->protocol == htons(ETH_P_IPV6)) {
196 /* ipv6 has not l3 cs, check for L4 header */
197 flag_ipoffset |= 1 << HNS_TXD_L4CS_B;
200 flag_ipoffset |= ip_offset << HNS_TXD_IPOFFSET_S;
204 flag_ipoffset |= frag_end << HNS_TXD_FE_B;
206 desc->tx.asid_bufnum_pid = cpu_to_le16(asid_bufnum_pid);
207 desc->tx.flag_ipoffset = cpu_to_le32(flag_ipoffset);
209 ring_ptr_move_fw(ring, next_to_use);
212 static void unfill_desc(struct hnae_ring *ring)
214 ring_ptr_move_bw(ring, next_to_use);
217 static int hns_nic_maybe_stop_tx(
218 struct sk_buff **out_skb, int *bnum, struct hnae_ring *ring)
220 struct sk_buff *skb = *out_skb;
221 struct sk_buff *new_skb = NULL;
224 /* no. of segments (plus a header) */
225 buf_num = skb_shinfo(skb)->nr_frags + 1;
227 if (unlikely(buf_num > ring->max_desc_num_per_pkt)) {
228 if (ring_space(ring) < 1)
231 new_skb = skb_copy(skb, GFP_ATOMIC);
235 dev_kfree_skb_any(skb);
238 } else if (buf_num > ring_space(ring)) {
246 static int hns_nic_maybe_stop_tso(
247 struct sk_buff **out_skb, int *bnum, struct hnae_ring *ring)
253 struct sk_buff *skb = *out_skb;
254 struct sk_buff *new_skb = NULL;
255 struct skb_frag_struct *frag;
257 size = skb_headlen(skb);
258 buf_num = (size + BD_MAX_SEND_SIZE - 1) / BD_MAX_SEND_SIZE;
260 frag_num = skb_shinfo(skb)->nr_frags;
261 for (i = 0; i < frag_num; i++) {
262 frag = &skb_shinfo(skb)->frags[i];
263 size = skb_frag_size(frag);
264 buf_num += (size + BD_MAX_SEND_SIZE - 1) / BD_MAX_SEND_SIZE;
267 if (unlikely(buf_num > ring->max_desc_num_per_pkt)) {
268 buf_num = (skb->len + BD_MAX_SEND_SIZE - 1) / BD_MAX_SEND_SIZE;
269 if (ring_space(ring) < buf_num)
271 /* manual split the send packet */
272 new_skb = skb_copy(skb, GFP_ATOMIC);
275 dev_kfree_skb_any(skb);
278 } else if (ring_space(ring) < buf_num) {
286 static void fill_tso_desc(struct hnae_ring *ring, void *priv,
287 int size, dma_addr_t dma, int frag_end,
288 int buf_num, enum hns_desc_type type, int mtu)
294 frag_buf_num = (size + BD_MAX_SEND_SIZE - 1) / BD_MAX_SEND_SIZE;
295 sizeoflast = size % BD_MAX_SEND_SIZE;
296 sizeoflast = sizeoflast ? sizeoflast : BD_MAX_SEND_SIZE;
298 /* when the frag size is bigger than hardware, split this frag */
299 for (k = 0; k < frag_buf_num; k++)
300 fill_v2_desc_hw(ring, priv, k == 0 ? size : 0,
301 (k == frag_buf_num - 1) ?
302 sizeoflast : BD_MAX_SEND_SIZE,
303 dma + BD_MAX_SEND_SIZE * k,
304 frag_end && (k == frag_buf_num - 1) ? 1 : 0,
306 (type == DESC_TYPE_SKB && !k) ?
307 DESC_TYPE_SKB : DESC_TYPE_PAGE,
311 netdev_tx_t hns_nic_net_xmit_hw(struct net_device *ndev,
313 struct hns_nic_ring_data *ring_data)
315 struct hns_nic_priv *priv = netdev_priv(ndev);
316 struct hnae_ring *ring = ring_data->ring;
317 struct device *dev = ring_to_dev(ring);
318 struct netdev_queue *dev_queue;
319 struct skb_frag_struct *frag;
323 int size, next_to_use;
326 switch (priv->ops.maybe_stop_tx(&skb, &buf_num, ring)) {
328 ring->stats.tx_busy++;
329 goto out_net_tx_busy;
331 ring->stats.sw_err_cnt++;
332 netdev_err(ndev, "no memory to xmit!\n");
338 /* no. of segments (plus a header) */
339 seg_num = skb_shinfo(skb)->nr_frags + 1;
340 next_to_use = ring->next_to_use;
342 /* fill the first part */
343 size = skb_headlen(skb);
344 dma = dma_map_single(dev, skb->data, size, DMA_TO_DEVICE);
345 if (dma_mapping_error(dev, dma)) {
346 netdev_err(ndev, "TX head DMA map failed\n");
347 ring->stats.sw_err_cnt++;
350 priv->ops.fill_desc(ring, skb, size, dma, seg_num == 1 ? 1 : 0,
351 buf_num, DESC_TYPE_SKB, ndev->mtu);
353 /* fill the fragments */
354 for (i = 1; i < seg_num; i++) {
355 frag = &skb_shinfo(skb)->frags[i - 1];
356 size = skb_frag_size(frag);
357 dma = skb_frag_dma_map(dev, frag, 0, size, DMA_TO_DEVICE);
358 if (dma_mapping_error(dev, dma)) {
359 netdev_err(ndev, "TX frag(%d) DMA map failed\n", i);
360 ring->stats.sw_err_cnt++;
361 goto out_map_frag_fail;
363 priv->ops.fill_desc(ring, skb_frag_page(frag), size, dma,
364 seg_num - 1 == i ? 1 : 0, buf_num,
365 DESC_TYPE_PAGE, ndev->mtu);
368 /*complete translate all packets*/
369 dev_queue = netdev_get_tx_queue(ndev, skb->queue_mapping);
370 netdev_tx_sent_queue(dev_queue, skb->len);
372 netif_trans_update(ndev);
373 ndev->stats.tx_bytes += skb->len;
374 ndev->stats.tx_packets++;
376 wmb(); /* commit all data before submit */
377 assert(skb->queue_mapping < priv->ae_handle->q_num);
378 hnae_queue_xmit(priv->ae_handle->qs[skb->queue_mapping], buf_num);
379 ring->stats.tx_pkts++;
380 ring->stats.tx_bytes += skb->len;
386 while (ring->next_to_use != next_to_use) {
388 if (ring->next_to_use != next_to_use)
390 ring->desc_cb[ring->next_to_use].dma,
391 ring->desc_cb[ring->next_to_use].length,
394 dma_unmap_single(dev,
395 ring->desc_cb[next_to_use].dma,
396 ring->desc_cb[next_to_use].length,
402 dev_kfree_skb_any(skb);
407 netif_stop_subqueue(ndev, skb->queue_mapping);
409 /* Herbert's original patch had:
410 * smp_mb__after_netif_stop_queue();
411 * but since that doesn't exist yet, just open code it.
414 return NETDEV_TX_BUSY;
417 static void hns_nic_reuse_page(struct sk_buff *skb, int i,
418 struct hnae_ring *ring, int pull_len,
419 struct hnae_desc_cb *desc_cb)
421 struct hnae_desc *desc;
427 twobufs = ((PAGE_SIZE < 8192) &&
428 hnae_buf_size(ring) == HNS_BUFFER_SIZE_2048);
430 desc = &ring->desc[ring->next_to_clean];
431 size = le16_to_cpu(desc->rx.size);
434 truesize = hnae_buf_size(ring);
436 truesize = ALIGN(size, L1_CACHE_BYTES);
437 last_offset = hnae_page_size(ring) - hnae_buf_size(ring);
440 skb_add_rx_frag(skb, i, desc_cb->priv, desc_cb->page_offset + pull_len,
441 size - pull_len, truesize);
443 /* avoid re-using remote pages,flag default unreuse */
444 if (unlikely(page_to_nid(desc_cb->priv) != numa_node_id()))
448 /* if we are only owner of page we can reuse it */
449 if (likely(page_count(desc_cb->priv) == 1)) {
450 /* flip page offset to other buffer */
451 desc_cb->page_offset ^= truesize;
453 desc_cb->reuse_flag = 1;
454 /* bump ref count on page before it is given*/
455 get_page(desc_cb->priv);
460 /* move offset up to the next cache line */
461 desc_cb->page_offset += truesize;
463 if (desc_cb->page_offset <= last_offset) {
464 desc_cb->reuse_flag = 1;
465 /* bump ref count on page before it is given*/
466 get_page(desc_cb->priv);
470 static void get_v2rx_desc_bnum(u32 bnum_flag, int *out_bnum)
472 *out_bnum = hnae_get_field(bnum_flag,
473 HNS_RXD_BUFNUM_M, HNS_RXD_BUFNUM_S) + 1;
476 static void get_rx_desc_bnum(u32 bnum_flag, int *out_bnum)
478 *out_bnum = hnae_get_field(bnum_flag,
479 HNS_RXD_BUFNUM_M, HNS_RXD_BUFNUM_S);
482 static void hns_nic_rx_checksum(struct hns_nic_ring_data *ring_data,
483 struct sk_buff *skb, u32 flag)
485 struct net_device *netdev = ring_data->napi.dev;
489 /* check if RX checksum offload is enabled */
490 if (unlikely(!(netdev->features & NETIF_F_RXCSUM)))
493 /* In hardware, we only support checksum for the following protocols:
495 * 2) TCP(over IPv4 or IPv6),
496 * 3) UDP(over IPv4 or IPv6),
497 * 4) SCTP(over IPv4 or IPv6)
498 * but we support many L3(IPv4, IPv6, MPLS, PPPoE etc) and L4(TCP,
499 * UDP, GRE, SCTP, IGMP, ICMP etc.) protocols.
501 * Hardware limitation:
502 * Our present hardware RX Descriptor lacks L3/L4 checksum "Status &
503 * Error" bit (which usually can be used to indicate whether checksum
504 * was calculated by the hardware and if there was any error encountered
505 * during checksum calculation).
507 * Software workaround:
508 * We do get info within the RX descriptor about the kind of L3/L4
509 * protocol coming in the packet and the error status. These errors
510 * might not just be checksum errors but could be related to version,
511 * length of IPv4, UDP, TCP etc.
512 * Because there is no-way of knowing if it is a L3/L4 error due to bad
513 * checksum or any other L3/L4 error, we will not (cannot) convey
514 * checksum status for such cases to upper stack and will not maintain
515 * the RX L3/L4 checksum counters as well.
518 l3id = hnae_get_field(flag, HNS_RXD_L3ID_M, HNS_RXD_L3ID_S);
519 l4id = hnae_get_field(flag, HNS_RXD_L4ID_M, HNS_RXD_L4ID_S);
521 /* check L3 protocol for which checksum is supported */
522 if ((l3id != HNS_RX_FLAG_L3ID_IPV4) && (l3id != HNS_RX_FLAG_L3ID_IPV6))
525 /* check for any(not just checksum)flagged L3 protocol errors */
526 if (unlikely(hnae_get_bit(flag, HNS_RXD_L3E_B)))
529 /* we do not support checksum of fragmented packets */
530 if (unlikely(hnae_get_bit(flag, HNS_RXD_FRAG_B)))
533 /* check L4 protocol for which checksum is supported */
534 if ((l4id != HNS_RX_FLAG_L4ID_TCP) &&
535 (l4id != HNS_RX_FLAG_L4ID_UDP) &&
536 (l4id != HNS_RX_FLAG_L4ID_SCTP))
539 /* check for any(not just checksum)flagged L4 protocol errors */
540 if (unlikely(hnae_get_bit(flag, HNS_RXD_L4E_B)))
543 /* now, this has to be a packet with valid RX checksum */
544 skb->ip_summed = CHECKSUM_UNNECESSARY;
547 static int hns_nic_poll_rx_skb(struct hns_nic_ring_data *ring_data,
548 struct sk_buff **out_skb, int *out_bnum)
550 struct hnae_ring *ring = ring_data->ring;
551 struct net_device *ndev = ring_data->napi.dev;
552 struct hns_nic_priv *priv = netdev_priv(ndev);
554 struct hnae_desc *desc;
555 struct hnae_desc_cb *desc_cb;
561 desc = &ring->desc[ring->next_to_clean];
562 desc_cb = &ring->desc_cb[ring->next_to_clean];
566 va = (unsigned char *)desc_cb->buf + desc_cb->page_offset;
568 /* prefetch first cache line of first page */
570 #if L1_CACHE_BYTES < 128
571 prefetch(va + L1_CACHE_BYTES);
574 skb = *out_skb = napi_alloc_skb(&ring_data->napi,
576 if (unlikely(!skb)) {
577 netdev_err(ndev, "alloc rx skb fail\n");
578 ring->stats.sw_err_cnt++;
582 prefetchw(skb->data);
583 length = le16_to_cpu(desc->rx.pkt_len);
584 bnum_flag = le32_to_cpu(desc->rx.ipoff_bnum_pid_flag);
585 priv->ops.get_rxd_bnum(bnum_flag, &bnum);
588 if (length <= HNS_RX_HEAD_SIZE) {
589 memcpy(__skb_put(skb, length), va, ALIGN(length, sizeof(long)));
591 /* we can reuse buffer as-is, just make sure it is local */
592 if (likely(page_to_nid(desc_cb->priv) == numa_node_id()))
593 desc_cb->reuse_flag = 1;
594 else /* this page cannot be reused so discard it */
595 put_page(desc_cb->priv);
597 ring_ptr_move_fw(ring, next_to_clean);
599 if (unlikely(bnum != 1)) { /* check err*/
604 ring->stats.seg_pkt_cnt++;
606 pull_len = eth_get_headlen(va, HNS_RX_HEAD_SIZE);
607 memcpy(__skb_put(skb, pull_len), va,
608 ALIGN(pull_len, sizeof(long)));
610 hns_nic_reuse_page(skb, 0, ring, pull_len, desc_cb);
611 ring_ptr_move_fw(ring, next_to_clean);
613 if (unlikely(bnum >= (int)MAX_SKB_FRAGS)) { /* check err*/
617 for (i = 1; i < bnum; i++) {
618 desc = &ring->desc[ring->next_to_clean];
619 desc_cb = &ring->desc_cb[ring->next_to_clean];
621 hns_nic_reuse_page(skb, i, ring, 0, desc_cb);
622 ring_ptr_move_fw(ring, next_to_clean);
626 /* check except process, free skb and jump the desc */
627 if (unlikely((!bnum) || (bnum > ring->max_desc_num_per_pkt))) {
629 *out_bnum = *out_bnum ? *out_bnum : 1; /* ntc moved,cannot 0*/
630 netdev_err(ndev, "invalid bnum(%d,%d,%d,%d),%016llx,%016llx\n",
631 bnum, ring->max_desc_num_per_pkt,
632 length, (int)MAX_SKB_FRAGS,
633 ((u64 *)desc)[0], ((u64 *)desc)[1]);
634 ring->stats.err_bd_num++;
635 dev_kfree_skb_any(skb);
639 bnum_flag = le32_to_cpu(desc->rx.ipoff_bnum_pid_flag);
641 if (unlikely(!hnae_get_bit(bnum_flag, HNS_RXD_VLD_B))) {
642 netdev_err(ndev, "no valid bd,%016llx,%016llx\n",
643 ((u64 *)desc)[0], ((u64 *)desc)[1]);
644 ring->stats.non_vld_descs++;
645 dev_kfree_skb_any(skb);
649 if (unlikely((!desc->rx.pkt_len) ||
650 hnae_get_bit(bnum_flag, HNS_RXD_DROP_B))) {
651 ring->stats.err_pkt_len++;
652 dev_kfree_skb_any(skb);
656 if (unlikely(hnae_get_bit(bnum_flag, HNS_RXD_L2E_B))) {
657 ring->stats.l2_err++;
658 dev_kfree_skb_any(skb);
662 ring->stats.rx_pkts++;
663 ring->stats.rx_bytes += skb->len;
665 /* indicate to upper stack if our hardware has already calculated
668 hns_nic_rx_checksum(ring_data, skb, bnum_flag);
674 hns_nic_alloc_rx_buffers(struct hns_nic_ring_data *ring_data, int cleand_count)
677 struct hnae_desc_cb res_cbs;
678 struct hnae_desc_cb *desc_cb;
679 struct hnae_ring *ring = ring_data->ring;
680 struct net_device *ndev = ring_data->napi.dev;
682 for (i = 0; i < cleand_count; i++) {
683 desc_cb = &ring->desc_cb[ring->next_to_use];
684 if (desc_cb->reuse_flag) {
685 ring->stats.reuse_pg_cnt++;
686 hnae_reuse_buffer(ring, ring->next_to_use);
688 ret = hnae_reserve_buffer_map(ring, &res_cbs);
690 ring->stats.sw_err_cnt++;
691 netdev_err(ndev, "hnae reserve buffer map failed.\n");
694 hnae_replace_buffer(ring, ring->next_to_use, &res_cbs);
697 ring_ptr_move_fw(ring, next_to_use);
700 wmb(); /* make all data has been write before submit */
701 writel_relaxed(i, ring->io_base + RCB_REG_HEAD);
704 /* return error number for error or number of desc left to take
706 static void hns_nic_rx_up_pro(struct hns_nic_ring_data *ring_data,
709 struct net_device *ndev = ring_data->napi.dev;
711 skb->protocol = eth_type_trans(skb, ndev);
712 (void)napi_gro_receive(&ring_data->napi, skb);
715 static int hns_desc_unused(struct hnae_ring *ring)
717 int ntc = ring->next_to_clean;
718 int ntu = ring->next_to_use;
720 return ((ntc >= ntu) ? 0 : ring->desc_num) + ntc - ntu;
723 #define HNS_LOWEST_LATENCY_RATE 27 /* 27 MB/s */
724 #define HNS_LOW_LATENCY_RATE 80 /* 80 MB/s */
726 #define HNS_COAL_BDNUM 3
728 static u32 hns_coal_rx_bdnum(struct hnae_ring *ring)
730 bool coal_enable = ring->q->handle->coal_adapt_en;
733 ring->coal_last_rx_bytes > HNS_LOWEST_LATENCY_RATE)
734 return HNS_COAL_BDNUM;
739 static void hns_update_rx_rate(struct hnae_ring *ring)
741 bool coal_enable = ring->q->handle->coal_adapt_en;
746 time_before(jiffies, ring->coal_last_jiffies + (HZ >> 4)))
749 /* ring->stats.rx_bytes overflowed */
750 if (ring->coal_last_rx_bytes > ring->stats.rx_bytes) {
751 ring->coal_last_rx_bytes = ring->stats.rx_bytes;
752 ring->coal_last_jiffies = jiffies;
756 total_bytes = ring->stats.rx_bytes - ring->coal_last_rx_bytes;
757 time_passed_ms = jiffies_to_msecs(jiffies - ring->coal_last_jiffies);
758 do_div(total_bytes, time_passed_ms);
759 ring->coal_rx_rate = total_bytes >> 10;
761 ring->coal_last_rx_bytes = ring->stats.rx_bytes;
762 ring->coal_last_jiffies = jiffies;
766 * smooth_alg - smoothing algrithm for adjusting coalesce parameter
768 static u32 smooth_alg(u32 new_param, u32 old_param)
770 u32 gap = (new_param > old_param) ? new_param - old_param
771 : old_param - new_param;
776 if (new_param > old_param)
777 return old_param + gap;
779 return old_param - gap;
783 * hns_nic_adp_coalesce - self adapte coalesce according to rx rate
784 * @ring_data: pointer to hns_nic_ring_data
786 static void hns_nic_adpt_coalesce(struct hns_nic_ring_data *ring_data)
788 struct hnae_ring *ring = ring_data->ring;
789 struct hnae_handle *handle = ring->q->handle;
790 u32 new_coal_param, old_coal_param = ring->coal_param;
792 if (ring->coal_rx_rate < HNS_LOWEST_LATENCY_RATE)
793 new_coal_param = HNAE_LOWEST_LATENCY_COAL_PARAM;
794 else if (ring->coal_rx_rate < HNS_LOW_LATENCY_RATE)
795 new_coal_param = HNAE_LOW_LATENCY_COAL_PARAM;
797 new_coal_param = HNAE_BULK_LATENCY_COAL_PARAM;
799 if (new_coal_param == old_coal_param &&
800 new_coal_param == handle->coal_param)
803 new_coal_param = smooth_alg(new_coal_param, old_coal_param);
804 ring->coal_param = new_coal_param;
807 * Because all ring in one port has one coalesce param, when one ring
808 * calculate its own coalesce param, it cannot write to hardware at
809 * once. There are three conditions as follows:
810 * 1. current ring's coalesce param is larger than the hardware.
811 * 2. or ring which adapt last time can change again.
814 if (new_coal_param == handle->coal_param) {
815 handle->coal_last_jiffies = jiffies;
816 handle->coal_ring_idx = ring_data->queue_index;
817 } else if (new_coal_param > handle->coal_param ||
818 handle->coal_ring_idx == ring_data->queue_index ||
819 time_after(jiffies, handle->coal_last_jiffies + (HZ >> 4))) {
820 handle->dev->ops->set_coalesce_usecs(handle,
822 handle->dev->ops->set_coalesce_frames(handle,
824 handle->coal_param = new_coal_param;
825 handle->coal_ring_idx = ring_data->queue_index;
826 handle->coal_last_jiffies = jiffies;
830 static int hns_nic_rx_poll_one(struct hns_nic_ring_data *ring_data,
833 struct hnae_ring *ring = ring_data->ring;
836 #define RCB_NOF_ALLOC_RX_BUFF_ONCE 16
837 int recv_pkts, recv_bds, clean_count, err;
838 int unused_count = hns_desc_unused(ring);
840 num = readl_relaxed(ring->io_base + RCB_REG_FBDNUM);
841 rmb(); /* make sure num taken effect before the other data is touched */
843 recv_pkts = 0, recv_bds = 0, clean_count = 0;
846 while (recv_pkts < budget && recv_bds < num) {
847 /* reuse or realloc buffers */
848 if (clean_count + unused_count >= RCB_NOF_ALLOC_RX_BUFF_ONCE) {
849 hns_nic_alloc_rx_buffers(ring_data,
850 clean_count + unused_count);
852 unused_count = hns_desc_unused(ring);
856 err = hns_nic_poll_rx_skb(ring_data, &skb, &bnum);
857 if (unlikely(!skb)) /* this fault cannot be repaired */
862 if (unlikely(err)) { /* do jump the err */
867 /* do update ip stack process*/
868 ((void (*)(struct hns_nic_ring_data *, struct sk_buff *))v)(
874 /* make all data has been write before submit */
875 if (clean_count + unused_count > 0)
876 hns_nic_alloc_rx_buffers(ring_data,
877 clean_count + unused_count);
882 static bool hns_nic_rx_fini_pro(struct hns_nic_ring_data *ring_data)
884 struct hnae_ring *ring = ring_data->ring;
888 hns_update_rx_rate(ring);
890 /* for hardware bug fixed */
891 ring_data->ring->q->handle->dev->ops->toggle_ring_irq(ring, 0);
892 num = readl_relaxed(ring->io_base + RCB_REG_FBDNUM);
894 if (num <= hns_coal_rx_bdnum(ring)) {
895 if (ring->q->handle->coal_adapt_en)
896 hns_nic_adpt_coalesce(ring_data);
900 ring_data->ring->q->handle->dev->ops->toggle_ring_irq(
909 static bool hns_nic_rx_fini_pro_v2(struct hns_nic_ring_data *ring_data)
911 struct hnae_ring *ring = ring_data->ring;
914 hns_update_rx_rate(ring);
915 num = readl_relaxed(ring->io_base + RCB_REG_FBDNUM);
917 if (num <= hns_coal_rx_bdnum(ring)) {
918 if (ring->q->handle->coal_adapt_en)
919 hns_nic_adpt_coalesce(ring_data);
927 static inline void hns_nic_reclaim_one_desc(struct hnae_ring *ring,
928 int *bytes, int *pkts)
930 struct hnae_desc_cb *desc_cb = &ring->desc_cb[ring->next_to_clean];
932 (*pkts) += (desc_cb->type == DESC_TYPE_SKB);
933 (*bytes) += desc_cb->length;
934 /* desc_cb will be cleaned, after hnae_free_buffer_detach*/
935 hnae_free_buffer_detach(ring, ring->next_to_clean);
937 ring_ptr_move_fw(ring, next_to_clean);
940 static int is_valid_clean_head(struct hnae_ring *ring, int h)
942 int u = ring->next_to_use;
943 int c = ring->next_to_clean;
945 if (unlikely(h > ring->desc_num))
948 assert(u > 0 && u < ring->desc_num);
949 assert(c > 0 && c < ring->desc_num);
950 assert(u != c && h != c); /* must be checked before call this func */
952 return u > c ? (h > c && h <= u) : (h > c || h <= u);
955 /* netif_tx_lock will turn down the performance, set only when necessary */
956 #ifdef CONFIG_NET_POLL_CONTROLLER
957 #define NETIF_TX_LOCK(ring) spin_lock(&(ring)->lock)
958 #define NETIF_TX_UNLOCK(ring) spin_unlock(&(ring)->lock)
960 #define NETIF_TX_LOCK(ring)
961 #define NETIF_TX_UNLOCK(ring)
964 /* reclaim all desc in one budget
965 * return error or number of desc left
967 static int hns_nic_tx_poll_one(struct hns_nic_ring_data *ring_data,
970 struct hnae_ring *ring = ring_data->ring;
971 struct net_device *ndev = ring_data->napi.dev;
972 struct netdev_queue *dev_queue;
973 struct hns_nic_priv *priv = netdev_priv(ndev);
979 head = readl_relaxed(ring->io_base + RCB_REG_HEAD);
980 rmb(); /* make sure head is ready before touch any data */
982 if (is_ring_empty(ring) || head == ring->next_to_clean) {
983 NETIF_TX_UNLOCK(ring);
984 return 0; /* no data to poll */
987 if (!is_valid_clean_head(ring, head)) {
988 netdev_err(ndev, "wrong head (%d, %d-%d)\n", head,
989 ring->next_to_use, ring->next_to_clean);
990 ring->stats.io_err_cnt++;
991 NETIF_TX_UNLOCK(ring);
997 while (head != ring->next_to_clean) {
998 hns_nic_reclaim_one_desc(ring, &bytes, &pkts);
999 /* issue prefetch for next Tx descriptor */
1000 prefetch(&ring->desc_cb[ring->next_to_clean]);
1003 NETIF_TX_UNLOCK(ring);
1005 dev_queue = netdev_get_tx_queue(ndev, ring_data->queue_index);
1006 netdev_tx_completed_queue(dev_queue, pkts, bytes);
1008 if (unlikely(priv->link && !netif_carrier_ok(ndev)))
1009 netif_carrier_on(ndev);
1011 if (unlikely(pkts && netif_carrier_ok(ndev) &&
1012 (ring_space(ring) >= ring->max_desc_num_per_pkt * 2))) {
1013 /* Make sure that anybody stopping the queue after this
1014 * sees the new next_to_clean.
1017 if (netif_tx_queue_stopped(dev_queue) &&
1018 !test_bit(NIC_STATE_DOWN, &priv->state)) {
1019 netif_tx_wake_queue(dev_queue);
1020 ring->stats.restart_queue++;
1026 static bool hns_nic_tx_fini_pro(struct hns_nic_ring_data *ring_data)
1028 struct hnae_ring *ring = ring_data->ring;
1031 ring_data->ring->q->handle->dev->ops->toggle_ring_irq(ring, 0);
1033 head = readl_relaxed(ring->io_base + RCB_REG_HEAD);
1035 if (head != ring->next_to_clean) {
1036 ring_data->ring->q->handle->dev->ops->toggle_ring_irq(
1037 ring_data->ring, 1);
1045 static bool hns_nic_tx_fini_pro_v2(struct hns_nic_ring_data *ring_data)
1047 struct hnae_ring *ring = ring_data->ring;
1048 int head = readl_relaxed(ring->io_base + RCB_REG_HEAD);
1050 if (head == ring->next_to_clean)
1056 static void hns_nic_tx_clr_all_bufs(struct hns_nic_ring_data *ring_data)
1058 struct hnae_ring *ring = ring_data->ring;
1059 struct net_device *ndev = ring_data->napi.dev;
1060 struct netdev_queue *dev_queue;
1064 NETIF_TX_LOCK(ring);
1066 head = ring->next_to_use; /* ntu :soft setted ring position*/
1069 while (head != ring->next_to_clean)
1070 hns_nic_reclaim_one_desc(ring, &bytes, &pkts);
1072 NETIF_TX_UNLOCK(ring);
1074 dev_queue = netdev_get_tx_queue(ndev, ring_data->queue_index);
1075 netdev_tx_reset_queue(dev_queue);
1078 static int hns_nic_common_poll(struct napi_struct *napi, int budget)
1080 int clean_complete = 0;
1081 struct hns_nic_ring_data *ring_data =
1082 container_of(napi, struct hns_nic_ring_data, napi);
1083 struct hnae_ring *ring = ring_data->ring;
1086 clean_complete += ring_data->poll_one(
1087 ring_data, budget - clean_complete,
1088 ring_data->ex_process);
1090 if (clean_complete < budget) {
1091 if (ring_data->fini_process(ring_data)) {
1092 napi_complete(napi);
1093 ring->q->handle->dev->ops->toggle_ring_irq(ring, 0);
1099 return clean_complete;
1102 static irqreturn_t hns_irq_handle(int irq, void *dev)
1104 struct hns_nic_ring_data *ring_data = (struct hns_nic_ring_data *)dev;
1106 ring_data->ring->q->handle->dev->ops->toggle_ring_irq(
1107 ring_data->ring, 1);
1108 napi_schedule(&ring_data->napi);
1114 *hns_nic_adjust_link - adjust net work mode by the phy stat or new param
1117 static void hns_nic_adjust_link(struct net_device *ndev)
1119 struct hns_nic_priv *priv = netdev_priv(ndev);
1120 struct hnae_handle *h = priv->ae_handle;
1123 /* If there is no phy, do not need adjust link */
1125 /* When phy link down, do nothing */
1126 if (ndev->phydev->link == 0)
1129 if (h->dev->ops->need_adjust_link(h, ndev->phydev->speed,
1130 ndev->phydev->duplex)) {
1131 /* because Hi161X chip don't support to change gmac
1132 * speed and duplex with traffic. Delay 200ms to
1133 * make sure there is no more data in chip FIFO.
1135 netif_carrier_off(ndev);
1137 h->dev->ops->adjust_link(h, ndev->phydev->speed,
1138 ndev->phydev->duplex);
1139 netif_carrier_on(ndev);
1143 state = state && h->dev->ops->get_status(h);
1145 if (state != priv->link) {
1147 netif_carrier_on(ndev);
1148 netif_tx_wake_all_queues(ndev);
1149 netdev_info(ndev, "link up\n");
1151 netif_carrier_off(ndev);
1152 netdev_info(ndev, "link down\n");
1159 *hns_nic_init_phy - init phy
1162 * Return 0 on success, negative on failure
1164 int hns_nic_init_phy(struct net_device *ndev, struct hnae_handle *h)
1166 __ETHTOOL_DECLARE_LINK_MODE_MASK(supported) = { 0, };
1167 struct phy_device *phy_dev = h->phy_dev;
1173 ethtool_convert_legacy_u32_to_link_mode(supported, h->if_support);
1174 linkmode_and(phy_dev->supported, phy_dev->supported, supported);
1175 linkmode_copy(phy_dev->advertising, phy_dev->supported);
1177 if (h->phy_if == PHY_INTERFACE_MODE_XGMII)
1178 phy_dev->autoneg = false;
1180 if (h->phy_if != PHY_INTERFACE_MODE_XGMII) {
1181 phy_dev->dev_flags = 0;
1183 ret = phy_connect_direct(ndev, phy_dev, hns_nic_adjust_link,
1186 ret = phy_attach_direct(ndev, phy_dev, 0, h->phy_if);
1194 static int hns_nic_ring_open(struct net_device *netdev, int idx)
1196 struct hns_nic_priv *priv = netdev_priv(netdev);
1197 struct hnae_handle *h = priv->ae_handle;
1199 napi_enable(&priv->ring_data[idx].napi);
1201 enable_irq(priv->ring_data[idx].ring->irq);
1202 h->dev->ops->toggle_ring_irq(priv->ring_data[idx].ring, 0);
1207 static int hns_nic_net_set_mac_address(struct net_device *ndev, void *p)
1209 struct hns_nic_priv *priv = netdev_priv(ndev);
1210 struct hnae_handle *h = priv->ae_handle;
1211 struct sockaddr *mac_addr = p;
1214 if (!mac_addr || !is_valid_ether_addr((const u8 *)mac_addr->sa_data))
1215 return -EADDRNOTAVAIL;
1217 ret = h->dev->ops->set_mac_addr(h, mac_addr->sa_data);
1219 netdev_err(ndev, "set_mac_address fail, ret=%d!\n", ret);
1223 memcpy(ndev->dev_addr, mac_addr->sa_data, ndev->addr_len);
1228 static void hns_nic_update_stats(struct net_device *netdev)
1230 struct hns_nic_priv *priv = netdev_priv(netdev);
1231 struct hnae_handle *h = priv->ae_handle;
1233 h->dev->ops->update_stats(h, &netdev->stats);
1236 /* set mac addr if it is configed. or leave it to the AE driver */
1237 static void hns_init_mac_addr(struct net_device *ndev)
1239 struct hns_nic_priv *priv = netdev_priv(ndev);
1241 if (!device_get_mac_address(priv->dev, ndev->dev_addr, ETH_ALEN)) {
1242 eth_hw_addr_random(ndev);
1243 dev_warn(priv->dev, "No valid mac, use random mac %pM",
1248 static void hns_nic_ring_close(struct net_device *netdev, int idx)
1250 struct hns_nic_priv *priv = netdev_priv(netdev);
1251 struct hnae_handle *h = priv->ae_handle;
1253 h->dev->ops->toggle_ring_irq(priv->ring_data[idx].ring, 1);
1254 disable_irq(priv->ring_data[idx].ring->irq);
1256 napi_disable(&priv->ring_data[idx].napi);
1259 static int hns_nic_init_affinity_mask(int q_num, int ring_idx,
1260 struct hnae_ring *ring, cpumask_t *mask)
1264 /* Diffrent irq banlance between 16core and 32core.
1265 * The cpu mask set by ring index according to the ring flag
1266 * which indicate the ring is tx or rx.
1268 if (q_num == num_possible_cpus()) {
1269 if (is_tx_ring(ring))
1272 cpu = ring_idx - q_num;
1274 if (is_tx_ring(ring))
1277 cpu = (ring_idx - q_num) * 2 + 1;
1280 cpumask_clear(mask);
1281 cpumask_set_cpu(cpu, mask);
1286 static void hns_nic_free_irq(int q_num, struct hns_nic_priv *priv)
1290 for (i = 0; i < q_num * 2; i++) {
1291 if (priv->ring_data[i].ring->irq_init_flag == RCB_IRQ_INITED) {
1292 irq_set_affinity_hint(priv->ring_data[i].ring->irq,
1294 free_irq(priv->ring_data[i].ring->irq,
1295 &priv->ring_data[i]);
1296 priv->ring_data[i].ring->irq_init_flag =
1302 static int hns_nic_init_irq(struct hns_nic_priv *priv)
1304 struct hnae_handle *h = priv->ae_handle;
1305 struct hns_nic_ring_data *rd;
1310 for (i = 0; i < h->q_num * 2; i++) {
1311 rd = &priv->ring_data[i];
1313 if (rd->ring->irq_init_flag == RCB_IRQ_INITED)
1316 snprintf(rd->ring->ring_name, RCB_RING_NAME_LEN,
1317 "%s-%s%d", priv->netdev->name,
1318 (is_tx_ring(rd->ring) ? "tx" : "rx"), rd->queue_index);
1320 rd->ring->ring_name[RCB_RING_NAME_LEN - 1] = '\0';
1322 ret = request_irq(rd->ring->irq,
1323 hns_irq_handle, 0, rd->ring->ring_name, rd);
1325 netdev_err(priv->netdev, "request irq(%d) fail\n",
1329 disable_irq(rd->ring->irq);
1331 cpu = hns_nic_init_affinity_mask(h->q_num, i,
1332 rd->ring, &rd->mask);
1334 if (cpu_online(cpu))
1335 irq_set_affinity_hint(rd->ring->irq,
1338 rd->ring->irq_init_flag = RCB_IRQ_INITED;
1344 hns_nic_free_irq(h->q_num, priv);
1348 static int hns_nic_net_up(struct net_device *ndev)
1350 struct hns_nic_priv *priv = netdev_priv(ndev);
1351 struct hnae_handle *h = priv->ae_handle;
1355 if (!test_bit(NIC_STATE_DOWN, &priv->state))
1358 ret = hns_nic_init_irq(priv);
1360 netdev_err(ndev, "hns init irq failed! ret=%d\n", ret);
1364 for (i = 0; i < h->q_num * 2; i++) {
1365 ret = hns_nic_ring_open(ndev, i);
1367 goto out_has_some_queues;
1370 ret = h->dev->ops->set_mac_addr(h, ndev->dev_addr);
1372 goto out_set_mac_addr_err;
1374 ret = h->dev->ops->start ? h->dev->ops->start(h) : 0;
1379 phy_start(ndev->phydev);
1381 clear_bit(NIC_STATE_DOWN, &priv->state);
1382 (void)mod_timer(&priv->service_timer, jiffies + SERVICE_TIMER_HZ);
1387 netif_stop_queue(ndev);
1388 out_set_mac_addr_err:
1389 out_has_some_queues:
1390 for (j = i - 1; j >= 0; j--)
1391 hns_nic_ring_close(ndev, j);
1393 hns_nic_free_irq(h->q_num, priv);
1394 set_bit(NIC_STATE_DOWN, &priv->state);
1399 static void hns_nic_net_down(struct net_device *ndev)
1402 struct hnae_ae_ops *ops;
1403 struct hns_nic_priv *priv = netdev_priv(ndev);
1405 if (test_and_set_bit(NIC_STATE_DOWN, &priv->state))
1408 (void)del_timer_sync(&priv->service_timer);
1409 netif_tx_stop_all_queues(ndev);
1410 netif_carrier_off(ndev);
1411 netif_tx_disable(ndev);
1415 phy_stop(ndev->phydev);
1417 ops = priv->ae_handle->dev->ops;
1420 ops->stop(priv->ae_handle);
1422 netif_tx_stop_all_queues(ndev);
1424 for (i = priv->ae_handle->q_num - 1; i >= 0; i--) {
1425 hns_nic_ring_close(ndev, i);
1426 hns_nic_ring_close(ndev, i + priv->ae_handle->q_num);
1428 /* clean tx buffers*/
1429 hns_nic_tx_clr_all_bufs(priv->ring_data + i);
1433 void hns_nic_net_reset(struct net_device *ndev)
1435 struct hns_nic_priv *priv = netdev_priv(ndev);
1436 struct hnae_handle *handle = priv->ae_handle;
1438 while (test_and_set_bit(NIC_STATE_RESETTING, &priv->state))
1439 usleep_range(1000, 2000);
1441 (void)hnae_reinit_handle(handle);
1443 clear_bit(NIC_STATE_RESETTING, &priv->state);
1446 void hns_nic_net_reinit(struct net_device *netdev)
1448 struct hns_nic_priv *priv = netdev_priv(netdev);
1449 enum hnae_port_type type = priv->ae_handle->port_type;
1451 netif_trans_update(priv->netdev);
1452 while (test_and_set_bit(NIC_STATE_REINITING, &priv->state))
1453 usleep_range(1000, 2000);
1455 hns_nic_net_down(netdev);
1457 /* Only do hns_nic_net_reset in debug mode
1458 * because of hardware limitation.
1460 if (type == HNAE_PORT_DEBUG)
1461 hns_nic_net_reset(netdev);
1463 (void)hns_nic_net_up(netdev);
1464 clear_bit(NIC_STATE_REINITING, &priv->state);
1467 static int hns_nic_net_open(struct net_device *ndev)
1469 struct hns_nic_priv *priv = netdev_priv(ndev);
1470 struct hnae_handle *h = priv->ae_handle;
1473 if (test_bit(NIC_STATE_TESTING, &priv->state))
1477 netif_carrier_off(ndev);
1479 ret = netif_set_real_num_tx_queues(ndev, h->q_num);
1481 netdev_err(ndev, "netif_set_real_num_tx_queues fail, ret=%d!\n",
1486 ret = netif_set_real_num_rx_queues(ndev, h->q_num);
1489 "netif_set_real_num_rx_queues fail, ret=%d!\n", ret);
1493 ret = hns_nic_net_up(ndev);
1496 "hns net up fail, ret=%d!\n", ret);
1503 static int hns_nic_net_stop(struct net_device *ndev)
1505 hns_nic_net_down(ndev);
1510 static void hns_tx_timeout_reset(struct hns_nic_priv *priv);
1511 #define HNS_TX_TIMEO_LIMIT (40 * HZ)
1512 static void hns_nic_net_timeout(struct net_device *ndev)
1514 struct hns_nic_priv *priv = netdev_priv(ndev);
1516 if (ndev->watchdog_timeo < HNS_TX_TIMEO_LIMIT) {
1517 ndev->watchdog_timeo *= 2;
1518 netdev_info(ndev, "watchdog_timo changed to %d.\n",
1519 ndev->watchdog_timeo);
1521 ndev->watchdog_timeo = HNS_NIC_TX_TIMEOUT;
1522 hns_tx_timeout_reset(priv);
1526 static int hns_nic_do_ioctl(struct net_device *netdev, struct ifreq *ifr,
1529 struct phy_device *phy_dev = netdev->phydev;
1531 if (!netif_running(netdev))
1537 return phy_mii_ioctl(phy_dev, ifr, cmd);
1540 static netdev_tx_t hns_nic_net_xmit(struct sk_buff *skb,
1541 struct net_device *ndev)
1543 struct hns_nic_priv *priv = netdev_priv(ndev);
1545 assert(skb->queue_mapping < ndev->ae_handle->q_num);
1547 return hns_nic_net_xmit_hw(ndev, skb,
1548 &tx_ring_data(priv, skb->queue_mapping));
1551 static void hns_nic_drop_rx_fetch(struct hns_nic_ring_data *ring_data,
1552 struct sk_buff *skb)
1554 dev_kfree_skb_any(skb);
1557 #define HNS_LB_TX_RING 0
1558 static struct sk_buff *hns_assemble_skb(struct net_device *ndev)
1560 struct sk_buff *skb;
1561 struct ethhdr *ethhdr;
1564 /* allocate test skb */
1565 skb = alloc_skb(64, GFP_KERNEL);
1571 memset(skb->data, 0xFF, skb->len);
1573 /* must be tcp/ip package */
1574 ethhdr = (struct ethhdr *)skb->data;
1575 ethhdr->h_proto = htons(ETH_P_IP);
1577 frame_len = skb->len & (~1ul);
1578 memset(&skb->data[frame_len / 2], 0xAA,
1581 skb->queue_mapping = HNS_LB_TX_RING;
1586 static int hns_enable_serdes_lb(struct net_device *ndev)
1588 struct hns_nic_priv *priv = netdev_priv(ndev);
1589 struct hnae_handle *h = priv->ae_handle;
1590 struct hnae_ae_ops *ops = h->dev->ops;
1594 ret = ops->set_loopback(h, MAC_INTERNALLOOP_SERDES, 1);
1598 ret = ops->start ? ops->start(h) : 0;
1602 /* link adjust duplex*/
1603 if (h->phy_if != PHY_INTERFACE_MODE_XGMII)
1609 ops->adjust_link(h, speed, duplex);
1611 /* wait h/w ready */
1617 static void hns_disable_serdes_lb(struct net_device *ndev)
1619 struct hns_nic_priv *priv = netdev_priv(ndev);
1620 struct hnae_handle *h = priv->ae_handle;
1621 struct hnae_ae_ops *ops = h->dev->ops;
1624 ops->set_loopback(h, MAC_INTERNALLOOP_SERDES, 0);
1628 *hns_nic_clear_all_rx_fetch - clear the chip fetched descriptions. The
1629 *function as follows:
1630 * 1. if one rx ring has found the page_offset is not equal 0 between head
1631 * and tail, it means that the chip fetched the wrong descs for the ring
1632 * which buffer size is 4096.
1633 * 2. we set the chip serdes loopback and set rss indirection to the ring.
1634 * 3. construct 64-bytes ip broadcast packages, wait the associated rx ring
1635 * recieving all packages and it will fetch new descriptions.
1636 * 4. recover to the original state.
1640 static int hns_nic_clear_all_rx_fetch(struct net_device *ndev)
1642 struct hns_nic_priv *priv = netdev_priv(ndev);
1643 struct hnae_handle *h = priv->ae_handle;
1644 struct hnae_ae_ops *ops = h->dev->ops;
1645 struct hns_nic_ring_data *rd;
1646 struct hnae_ring *ring;
1647 struct sk_buff *skb;
1658 /* alloc indir memory */
1659 indir_size = ops->get_rss_indir_size(h) * sizeof(*org_indir);
1660 org_indir = kzalloc(indir_size, GFP_KERNEL);
1664 /* store the orginal indirection */
1665 ops->get_rss(h, org_indir, NULL, NULL);
1667 cur_indir = kzalloc(indir_size, GFP_KERNEL);
1670 goto cur_indir_alloc_err;
1674 if (hns_enable_serdes_lb(ndev)) {
1676 goto enable_serdes_lb_err;
1679 /* foreach every rx ring to clear fetch desc */
1680 for (i = 0; i < h->q_num; i++) {
1681 ring = &h->qs[i]->rx_ring;
1682 head = readl_relaxed(ring->io_base + RCB_REG_HEAD);
1683 tail = readl_relaxed(ring->io_base + RCB_REG_TAIL);
1685 fetch_num = ring_dist(ring, head, tail);
1687 while (head != tail) {
1688 if (ring->desc_cb[head].page_offset != 0) {
1694 if (head == ring->desc_num)
1699 for (j = 0; j < indir_size / sizeof(*org_indir); j++)
1701 ops->set_rss(h, cur_indir, NULL, 0);
1703 for (j = 0; j < fetch_num; j++) {
1704 /* alloc one skb and init */
1705 skb = hns_assemble_skb(ndev);
1708 rd = &tx_ring_data(priv, skb->queue_mapping);
1709 hns_nic_net_xmit_hw(ndev, skb, rd);
1712 while (retry_times++ < 10) {
1715 rd = &rx_ring_data(priv, i);
1716 if (rd->poll_one(rd, fetch_num,
1717 hns_nic_drop_rx_fetch))
1722 while (retry_times++ < 10) {
1724 /* clean tx ring 0 send package */
1725 rd = &tx_ring_data(priv,
1727 if (rd->poll_one(rd, fetch_num, NULL))
1735 /* restore everything */
1736 ops->set_rss(h, org_indir, NULL, 0);
1737 hns_disable_serdes_lb(ndev);
1738 enable_serdes_lb_err:
1740 cur_indir_alloc_err:
1746 static int hns_nic_change_mtu(struct net_device *ndev, int new_mtu)
1748 struct hns_nic_priv *priv = netdev_priv(ndev);
1749 struct hnae_handle *h = priv->ae_handle;
1750 bool if_running = netif_running(ndev);
1753 /* MTU < 68 is an error and causes problems on some kernels */
1758 if (new_mtu == ndev->mtu)
1761 if (!h->dev->ops->set_mtu)
1765 (void)hns_nic_net_stop(ndev);
1769 if (priv->enet_ver != AE_VERSION_1 &&
1770 ndev->mtu <= BD_SIZE_2048_MAX_MTU &&
1771 new_mtu > BD_SIZE_2048_MAX_MTU) {
1773 hnae_reinit_all_ring_desc(h);
1775 /* clear the package which the chip has fetched */
1776 ret = hns_nic_clear_all_rx_fetch(ndev);
1778 /* the page offset must be consist with desc */
1779 hnae_reinit_all_ring_page_off(h);
1782 netdev_err(ndev, "clear the fetched desc fail\n");
1787 ret = h->dev->ops->set_mtu(h, new_mtu);
1789 netdev_err(ndev, "set mtu fail, return value %d\n",
1794 /* finally, set new mtu to netdevice */
1795 ndev->mtu = new_mtu;
1799 if (hns_nic_net_open(ndev)) {
1800 netdev_err(ndev, "hns net open fail\n");
1808 static int hns_nic_set_features(struct net_device *netdev,
1809 netdev_features_t features)
1811 struct hns_nic_priv *priv = netdev_priv(netdev);
1813 switch (priv->enet_ver) {
1815 if (features & (NETIF_F_TSO | NETIF_F_TSO6))
1816 netdev_info(netdev, "enet v1 do not support tso!\n");
1819 if (features & (NETIF_F_TSO | NETIF_F_TSO6)) {
1820 priv->ops.fill_desc = fill_tso_desc;
1821 priv->ops.maybe_stop_tx = hns_nic_maybe_stop_tso;
1822 /* The chip only support 7*4096 */
1823 netif_set_gso_max_size(netdev, 7 * 4096);
1825 priv->ops.fill_desc = fill_v2_desc;
1826 priv->ops.maybe_stop_tx = hns_nic_maybe_stop_tx;
1830 netdev->features = features;
1834 static netdev_features_t hns_nic_fix_features(
1835 struct net_device *netdev, netdev_features_t features)
1837 struct hns_nic_priv *priv = netdev_priv(netdev);
1839 switch (priv->enet_ver) {
1841 features &= ~(NETIF_F_TSO | NETIF_F_TSO6 |
1842 NETIF_F_HW_VLAN_CTAG_FILTER);
1850 static int hns_nic_uc_sync(struct net_device *netdev, const unsigned char *addr)
1852 struct hns_nic_priv *priv = netdev_priv(netdev);
1853 struct hnae_handle *h = priv->ae_handle;
1855 if (h->dev->ops->add_uc_addr)
1856 return h->dev->ops->add_uc_addr(h, addr);
1861 static int hns_nic_uc_unsync(struct net_device *netdev,
1862 const unsigned char *addr)
1864 struct hns_nic_priv *priv = netdev_priv(netdev);
1865 struct hnae_handle *h = priv->ae_handle;
1867 if (h->dev->ops->rm_uc_addr)
1868 return h->dev->ops->rm_uc_addr(h, addr);
1874 * nic_set_multicast_list - set mutl mac address
1875 * @netdev: net device
1880 static void hns_set_multicast_list(struct net_device *ndev)
1882 struct hns_nic_priv *priv = netdev_priv(ndev);
1883 struct hnae_handle *h = priv->ae_handle;
1884 struct netdev_hw_addr *ha = NULL;
1887 netdev_err(ndev, "hnae handle is null\n");
1891 if (h->dev->ops->clr_mc_addr)
1892 if (h->dev->ops->clr_mc_addr(h))
1893 netdev_err(ndev, "clear multicast address fail\n");
1895 if (h->dev->ops->set_mc_addr) {
1896 netdev_for_each_mc_addr(ha, ndev)
1897 if (h->dev->ops->set_mc_addr(h, ha->addr))
1898 netdev_err(ndev, "set multicast fail\n");
1902 static void hns_nic_set_rx_mode(struct net_device *ndev)
1904 struct hns_nic_priv *priv = netdev_priv(ndev);
1905 struct hnae_handle *h = priv->ae_handle;
1907 if (h->dev->ops->set_promisc_mode) {
1908 if (ndev->flags & IFF_PROMISC)
1909 h->dev->ops->set_promisc_mode(h, 1);
1911 h->dev->ops->set_promisc_mode(h, 0);
1914 hns_set_multicast_list(ndev);
1916 if (__dev_uc_sync(ndev, hns_nic_uc_sync, hns_nic_uc_unsync))
1917 netdev_err(ndev, "sync uc address fail\n");
1920 static void hns_nic_get_stats64(struct net_device *ndev,
1921 struct rtnl_link_stats64 *stats)
1928 struct hns_nic_priv *priv = netdev_priv(ndev);
1929 struct hnae_handle *h = priv->ae_handle;
1931 for (idx = 0; idx < h->q_num; idx++) {
1932 tx_bytes += h->qs[idx]->tx_ring.stats.tx_bytes;
1933 tx_pkts += h->qs[idx]->tx_ring.stats.tx_pkts;
1934 rx_bytes += h->qs[idx]->rx_ring.stats.rx_bytes;
1935 rx_pkts += h->qs[idx]->rx_ring.stats.rx_pkts;
1938 stats->tx_bytes = tx_bytes;
1939 stats->tx_packets = tx_pkts;
1940 stats->rx_bytes = rx_bytes;
1941 stats->rx_packets = rx_pkts;
1943 stats->rx_errors = ndev->stats.rx_errors;
1944 stats->multicast = ndev->stats.multicast;
1945 stats->rx_length_errors = ndev->stats.rx_length_errors;
1946 stats->rx_crc_errors = ndev->stats.rx_crc_errors;
1947 stats->rx_missed_errors = ndev->stats.rx_missed_errors;
1949 stats->tx_errors = ndev->stats.tx_errors;
1950 stats->rx_dropped = ndev->stats.rx_dropped;
1951 stats->tx_dropped = ndev->stats.tx_dropped;
1952 stats->collisions = ndev->stats.collisions;
1953 stats->rx_over_errors = ndev->stats.rx_over_errors;
1954 stats->rx_frame_errors = ndev->stats.rx_frame_errors;
1955 stats->rx_fifo_errors = ndev->stats.rx_fifo_errors;
1956 stats->tx_aborted_errors = ndev->stats.tx_aborted_errors;
1957 stats->tx_carrier_errors = ndev->stats.tx_carrier_errors;
1958 stats->tx_fifo_errors = ndev->stats.tx_fifo_errors;
1959 stats->tx_heartbeat_errors = ndev->stats.tx_heartbeat_errors;
1960 stats->tx_window_errors = ndev->stats.tx_window_errors;
1961 stats->rx_compressed = ndev->stats.rx_compressed;
1962 stats->tx_compressed = ndev->stats.tx_compressed;
1966 hns_nic_select_queue(struct net_device *ndev, struct sk_buff *skb,
1967 struct net_device *sb_dev,
1968 select_queue_fallback_t fallback)
1970 struct ethhdr *eth_hdr = (struct ethhdr *)skb->data;
1971 struct hns_nic_priv *priv = netdev_priv(ndev);
1973 /* fix hardware broadcast/multicast packets queue loopback */
1974 if (!AE_IS_VER1(priv->enet_ver) &&
1975 is_multicast_ether_addr(eth_hdr->h_dest))
1978 return fallback(ndev, skb, NULL);
1981 static const struct net_device_ops hns_nic_netdev_ops = {
1982 .ndo_open = hns_nic_net_open,
1983 .ndo_stop = hns_nic_net_stop,
1984 .ndo_start_xmit = hns_nic_net_xmit,
1985 .ndo_tx_timeout = hns_nic_net_timeout,
1986 .ndo_set_mac_address = hns_nic_net_set_mac_address,
1987 .ndo_change_mtu = hns_nic_change_mtu,
1988 .ndo_do_ioctl = hns_nic_do_ioctl,
1989 .ndo_set_features = hns_nic_set_features,
1990 .ndo_fix_features = hns_nic_fix_features,
1991 .ndo_get_stats64 = hns_nic_get_stats64,
1992 .ndo_set_rx_mode = hns_nic_set_rx_mode,
1993 .ndo_select_queue = hns_nic_select_queue,
1996 static void hns_nic_update_link_status(struct net_device *netdev)
1998 struct hns_nic_priv *priv = netdev_priv(netdev);
2000 struct hnae_handle *h = priv->ae_handle;
2003 if (h->phy_if != PHY_INTERFACE_MODE_XGMII)
2006 (void)genphy_read_status(h->phy_dev);
2008 hns_nic_adjust_link(netdev);
2011 /* for dumping key regs*/
2012 static void hns_nic_dump(struct hns_nic_priv *priv)
2014 struct hnae_handle *h = priv->ae_handle;
2015 struct hnae_ae_ops *ops = h->dev->ops;
2016 u32 *data, reg_num, i;
2018 if (ops->get_regs_len && ops->get_regs) {
2019 reg_num = ops->get_regs_len(priv->ae_handle);
2020 reg_num = (reg_num + 3ul) & ~3ul;
2021 data = kcalloc(reg_num, sizeof(u32), GFP_KERNEL);
2023 ops->get_regs(priv->ae_handle, data);
2024 for (i = 0; i < reg_num; i += 4)
2025 pr_info("0x%08x: 0x%08x 0x%08x 0x%08x 0x%08x\n",
2026 i, data[i], data[i + 1],
2027 data[i + 2], data[i + 3]);
2032 for (i = 0; i < h->q_num; i++) {
2033 pr_info("tx_queue%d_next_to_clean:%d\n",
2034 i, h->qs[i]->tx_ring.next_to_clean);
2035 pr_info("tx_queue%d_next_to_use:%d\n",
2036 i, h->qs[i]->tx_ring.next_to_use);
2037 pr_info("rx_queue%d_next_to_clean:%d\n",
2038 i, h->qs[i]->rx_ring.next_to_clean);
2039 pr_info("rx_queue%d_next_to_use:%d\n",
2040 i, h->qs[i]->rx_ring.next_to_use);
2044 /* for resetting subtask */
2045 static void hns_nic_reset_subtask(struct hns_nic_priv *priv)
2047 enum hnae_port_type type = priv->ae_handle->port_type;
2049 if (!test_bit(NIC_STATE2_RESET_REQUESTED, &priv->state))
2051 clear_bit(NIC_STATE2_RESET_REQUESTED, &priv->state);
2053 /* If we're already down, removing or resetting, just bail */
2054 if (test_bit(NIC_STATE_DOWN, &priv->state) ||
2055 test_bit(NIC_STATE_REMOVING, &priv->state) ||
2056 test_bit(NIC_STATE_RESETTING, &priv->state))
2060 netdev_info(priv->netdev, "try to reset %s port!\n",
2061 (type == HNAE_PORT_DEBUG ? "debug" : "service"));
2064 /* put off any impending NetWatchDogTimeout */
2065 netif_trans_update(priv->netdev);
2066 hns_nic_net_reinit(priv->netdev);
2071 /* for doing service complete*/
2072 static void hns_nic_service_event_complete(struct hns_nic_priv *priv)
2074 WARN_ON(!test_bit(NIC_STATE_SERVICE_SCHED, &priv->state));
2075 /* make sure to commit the things */
2076 smp_mb__before_atomic();
2077 clear_bit(NIC_STATE_SERVICE_SCHED, &priv->state);
2080 static void hns_nic_service_task(struct work_struct *work)
2082 struct hns_nic_priv *priv
2083 = container_of(work, struct hns_nic_priv, service_task);
2084 struct hnae_handle *h = priv->ae_handle;
2086 hns_nic_reset_subtask(priv);
2087 hns_nic_update_link_status(priv->netdev);
2088 h->dev->ops->update_led_status(h);
2089 hns_nic_update_stats(priv->netdev);
2091 hns_nic_service_event_complete(priv);
2094 static void hns_nic_task_schedule(struct hns_nic_priv *priv)
2096 if (!test_bit(NIC_STATE_DOWN, &priv->state) &&
2097 !test_bit(NIC_STATE_REMOVING, &priv->state) &&
2098 !test_and_set_bit(NIC_STATE_SERVICE_SCHED, &priv->state))
2099 (void)schedule_work(&priv->service_task);
2102 static void hns_nic_service_timer(struct timer_list *t)
2104 struct hns_nic_priv *priv = from_timer(priv, t, service_timer);
2106 (void)mod_timer(&priv->service_timer, jiffies + SERVICE_TIMER_HZ);
2108 hns_nic_task_schedule(priv);
2112 * hns_tx_timeout_reset - initiate reset due to Tx timeout
2113 * @priv: driver private struct
2115 static void hns_tx_timeout_reset(struct hns_nic_priv *priv)
2117 /* Do the reset outside of interrupt context */
2118 if (!test_bit(NIC_STATE_DOWN, &priv->state)) {
2119 set_bit(NIC_STATE2_RESET_REQUESTED, &priv->state);
2120 netdev_warn(priv->netdev,
2121 "initiating reset due to tx timeout(%llu,0x%lx)\n",
2122 priv->tx_timeout_count, priv->state);
2123 priv->tx_timeout_count++;
2124 hns_nic_task_schedule(priv);
2128 static int hns_nic_init_ring_data(struct hns_nic_priv *priv)
2130 struct hnae_handle *h = priv->ae_handle;
2131 struct hns_nic_ring_data *rd;
2132 bool is_ver1 = AE_IS_VER1(priv->enet_ver);
2135 if (h->q_num > NIC_MAX_Q_PER_VF) {
2136 netdev_err(priv->netdev, "too much queue (%d)\n", h->q_num);
2140 priv->ring_data = kzalloc(array3_size(h->q_num,
2141 sizeof(*priv->ring_data), 2),
2143 if (!priv->ring_data)
2146 for (i = 0; i < h->q_num; i++) {
2147 rd = &priv->ring_data[i];
2148 rd->queue_index = i;
2149 rd->ring = &h->qs[i]->tx_ring;
2150 rd->poll_one = hns_nic_tx_poll_one;
2151 rd->fini_process = is_ver1 ? hns_nic_tx_fini_pro :
2152 hns_nic_tx_fini_pro_v2;
2154 netif_napi_add(priv->netdev, &rd->napi,
2155 hns_nic_common_poll, NIC_TX_CLEAN_MAX_NUM);
2156 rd->ring->irq_init_flag = RCB_IRQ_NOT_INITED;
2158 for (i = h->q_num; i < h->q_num * 2; i++) {
2159 rd = &priv->ring_data[i];
2160 rd->queue_index = i - h->q_num;
2161 rd->ring = &h->qs[i - h->q_num]->rx_ring;
2162 rd->poll_one = hns_nic_rx_poll_one;
2163 rd->ex_process = hns_nic_rx_up_pro;
2164 rd->fini_process = is_ver1 ? hns_nic_rx_fini_pro :
2165 hns_nic_rx_fini_pro_v2;
2167 netif_napi_add(priv->netdev, &rd->napi,
2168 hns_nic_common_poll, NIC_RX_CLEAN_MAX_NUM);
2169 rd->ring->irq_init_flag = RCB_IRQ_NOT_INITED;
2175 static void hns_nic_uninit_ring_data(struct hns_nic_priv *priv)
2177 struct hnae_handle *h = priv->ae_handle;
2180 for (i = 0; i < h->q_num * 2; i++) {
2181 netif_napi_del(&priv->ring_data[i].napi);
2182 if (priv->ring_data[i].ring->irq_init_flag == RCB_IRQ_INITED) {
2183 (void)irq_set_affinity_hint(
2184 priv->ring_data[i].ring->irq,
2186 free_irq(priv->ring_data[i].ring->irq,
2187 &priv->ring_data[i]);
2190 priv->ring_data[i].ring->irq_init_flag = RCB_IRQ_NOT_INITED;
2192 kfree(priv->ring_data);
2195 static void hns_nic_set_priv_ops(struct net_device *netdev)
2197 struct hns_nic_priv *priv = netdev_priv(netdev);
2198 struct hnae_handle *h = priv->ae_handle;
2200 if (AE_IS_VER1(priv->enet_ver)) {
2201 priv->ops.fill_desc = fill_desc;
2202 priv->ops.get_rxd_bnum = get_rx_desc_bnum;
2203 priv->ops.maybe_stop_tx = hns_nic_maybe_stop_tx;
2205 priv->ops.get_rxd_bnum = get_v2rx_desc_bnum;
2206 if ((netdev->features & NETIF_F_TSO) ||
2207 (netdev->features & NETIF_F_TSO6)) {
2208 priv->ops.fill_desc = fill_tso_desc;
2209 priv->ops.maybe_stop_tx = hns_nic_maybe_stop_tso;
2210 /* This chip only support 7*4096 */
2211 netif_set_gso_max_size(netdev, 7 * 4096);
2213 priv->ops.fill_desc = fill_v2_desc;
2214 priv->ops.maybe_stop_tx = hns_nic_maybe_stop_tx;
2216 /* enable tso when init
2217 * control tso on/off through TSE bit in bd
2219 h->dev->ops->set_tso_stats(h, 1);
2223 static int hns_nic_try_get_ae(struct net_device *ndev)
2225 struct hns_nic_priv *priv = netdev_priv(ndev);
2226 struct hnae_handle *h;
2229 h = hnae_get_handle(&priv->netdev->dev,
2230 priv->fwnode, priv->port_id, NULL);
2231 if (IS_ERR_OR_NULL(h)) {
2233 dev_dbg(priv->dev, "has not handle, register notifier!\n");
2236 priv->ae_handle = h;
2238 ret = hns_nic_init_phy(ndev, h);
2240 dev_err(priv->dev, "probe phy device fail!\n");
2244 ret = hns_nic_init_ring_data(priv);
2247 goto out_init_ring_data;
2250 hns_nic_set_priv_ops(ndev);
2252 ret = register_netdev(ndev);
2254 dev_err(priv->dev, "probe register netdev fail!\n");
2255 goto out_reg_ndev_fail;
2260 hns_nic_uninit_ring_data(priv);
2261 priv->ring_data = NULL;
2264 hnae_put_handle(priv->ae_handle);
2265 priv->ae_handle = NULL;
2270 static int hns_nic_notifier_action(struct notifier_block *nb,
2271 unsigned long action, void *data)
2273 struct hns_nic_priv *priv =
2274 container_of(nb, struct hns_nic_priv, notifier_block);
2276 assert(action == HNAE_AE_REGISTER);
2278 if (!hns_nic_try_get_ae(priv->netdev)) {
2279 hnae_unregister_notifier(&priv->notifier_block);
2280 priv->notifier_block.notifier_call = NULL;
2285 static int hns_nic_dev_probe(struct platform_device *pdev)
2287 struct device *dev = &pdev->dev;
2288 struct net_device *ndev;
2289 struct hns_nic_priv *priv;
2293 ndev = alloc_etherdev_mq(sizeof(struct hns_nic_priv), NIC_MAX_Q_PER_VF);
2297 platform_set_drvdata(pdev, ndev);
2299 priv = netdev_priv(ndev);
2301 priv->netdev = ndev;
2303 if (dev_of_node(dev)) {
2304 struct device_node *ae_node;
2306 if (of_device_is_compatible(dev->of_node,
2307 "hisilicon,hns-nic-v1"))
2308 priv->enet_ver = AE_VERSION_1;
2310 priv->enet_ver = AE_VERSION_2;
2312 ae_node = of_parse_phandle(dev->of_node, "ae-handle", 0);
2315 dev_err(dev, "not find ae-handle\n");
2316 goto out_read_prop_fail;
2318 priv->fwnode = &ae_node->fwnode;
2319 } else if (is_acpi_node(dev->fwnode)) {
2320 struct fwnode_reference_args args;
2322 if (acpi_dev_found(hns_enet_acpi_match[0].id))
2323 priv->enet_ver = AE_VERSION_1;
2324 else if (acpi_dev_found(hns_enet_acpi_match[1].id))
2325 priv->enet_ver = AE_VERSION_2;
2329 /* try to find port-idx-in-ae first */
2330 ret = acpi_node_get_property_reference(dev->fwnode,
2331 "ae-handle", 0, &args);
2333 dev_err(dev, "not find ae-handle\n");
2334 goto out_read_prop_fail;
2336 if (!is_acpi_device_node(args.fwnode)) {
2338 goto out_read_prop_fail;
2340 priv->fwnode = args.fwnode;
2342 dev_err(dev, "cannot read cfg data from OF or acpi\n");
2346 ret = device_property_read_u32(dev, "port-idx-in-ae", &port_id);
2348 /* only for old code compatible */
2349 ret = device_property_read_u32(dev, "port-id", &port_id);
2351 goto out_read_prop_fail;
2352 /* for old dts, we need to caculate the port offset */
2353 port_id = port_id < HNS_SRV_OFFSET ? port_id + HNS_DEBUG_OFFSET
2354 : port_id - HNS_SRV_OFFSET;
2356 priv->port_id = port_id;
2358 hns_init_mac_addr(ndev);
2360 ndev->watchdog_timeo = HNS_NIC_TX_TIMEOUT;
2361 ndev->priv_flags |= IFF_UNICAST_FLT;
2362 ndev->netdev_ops = &hns_nic_netdev_ops;
2363 hns_ethtool_set_ops(ndev);
2365 ndev->features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
2366 NETIF_F_RXCSUM | NETIF_F_SG | NETIF_F_GSO |
2368 ndev->vlan_features |=
2369 NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM | NETIF_F_RXCSUM;
2370 ndev->vlan_features |= NETIF_F_SG | NETIF_F_GSO | NETIF_F_GRO;
2372 /* MTU range: 68 - 9578 (v1) or 9706 (v2) */
2373 ndev->min_mtu = MAC_MIN_MTU;
2374 switch (priv->enet_ver) {
2376 ndev->features |= NETIF_F_TSO | NETIF_F_TSO6 | NETIF_F_NTUPLE;
2377 ndev->hw_features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
2378 NETIF_F_RXCSUM | NETIF_F_SG | NETIF_F_GSO |
2379 NETIF_F_GRO | NETIF_F_TSO | NETIF_F_TSO6;
2380 ndev->max_mtu = MAC_MAX_MTU_V2 -
2381 (ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN);
2384 ndev->max_mtu = MAC_MAX_MTU -
2385 (ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN);
2389 SET_NETDEV_DEV(ndev, dev);
2391 if (!dma_set_mask_and_coherent(dev, DMA_BIT_MASK(64)))
2392 dev_dbg(dev, "set mask to 64bit\n");
2394 dev_err(dev, "set mask to 64bit fail!\n");
2396 /* carrier off reporting is important to ethtool even BEFORE open */
2397 netif_carrier_off(ndev);
2399 timer_setup(&priv->service_timer, hns_nic_service_timer, 0);
2400 INIT_WORK(&priv->service_task, hns_nic_service_task);
2402 set_bit(NIC_STATE_SERVICE_INITED, &priv->state);
2403 clear_bit(NIC_STATE_SERVICE_SCHED, &priv->state);
2404 set_bit(NIC_STATE_DOWN, &priv->state);
2406 if (hns_nic_try_get_ae(priv->netdev)) {
2407 priv->notifier_block.notifier_call = hns_nic_notifier_action;
2408 ret = hnae_register_notifier(&priv->notifier_block);
2410 dev_err(dev, "register notifier fail!\n");
2411 goto out_notify_fail;
2413 dev_dbg(dev, "has not handle, register notifier!\n");
2419 (void)cancel_work_sync(&priv->service_task);
2421 /* safe for ACPI FW */
2422 of_node_put(to_of_node(priv->fwnode));
2427 static int hns_nic_dev_remove(struct platform_device *pdev)
2429 struct net_device *ndev = platform_get_drvdata(pdev);
2430 struct hns_nic_priv *priv = netdev_priv(ndev);
2432 if (ndev->reg_state != NETREG_UNINITIALIZED)
2433 unregister_netdev(ndev);
2435 if (priv->ring_data)
2436 hns_nic_uninit_ring_data(priv);
2437 priv->ring_data = NULL;
2440 phy_disconnect(ndev->phydev);
2442 if (!IS_ERR_OR_NULL(priv->ae_handle))
2443 hnae_put_handle(priv->ae_handle);
2444 priv->ae_handle = NULL;
2445 if (priv->notifier_block.notifier_call)
2446 hnae_unregister_notifier(&priv->notifier_block);
2447 priv->notifier_block.notifier_call = NULL;
2449 set_bit(NIC_STATE_REMOVING, &priv->state);
2450 (void)cancel_work_sync(&priv->service_task);
2452 /* safe for ACPI FW */
2453 of_node_put(to_of_node(priv->fwnode));
2459 static const struct of_device_id hns_enet_of_match[] = {
2460 {.compatible = "hisilicon,hns-nic-v1",},
2461 {.compatible = "hisilicon,hns-nic-v2",},
2465 MODULE_DEVICE_TABLE(of, hns_enet_of_match);
2467 static struct platform_driver hns_nic_dev_driver = {
2470 .of_match_table = hns_enet_of_match,
2471 .acpi_match_table = ACPI_PTR(hns_enet_acpi_match),
2473 .probe = hns_nic_dev_probe,
2474 .remove = hns_nic_dev_remove,
2477 module_platform_driver(hns_nic_dev_driver);
2479 MODULE_DESCRIPTION("HISILICON HNS Ethernet driver");
2480 MODULE_AUTHOR("Hisilicon, Inc.");
2481 MODULE_LICENSE("GPL");
2482 MODULE_ALIAS("platform:hns-nic");