drivers/net/ethernet/hisilicon/hns/hns_enet.c

   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/module.h>
  15 #include <linux/phy.h>
  16 #include <linux/platform_device.h>
  17 #include <linux/skbuff.h>
  18
  19 #include "hnae.h"
  20 #include "hns_enet.h"
  21 #include "hns_dsaf_mac.h"
  22
  23 #define NIC_MAX_Q_PER_VF 16
  24 #define HNS_NIC_TX_TIMEOUT (5 * HZ)
  25
  26 #define SERVICE_TIMER_HZ (1 * HZ)
  27
  28 #define RCB_IRQ_NOT_INITED 0
  29 #define RCB_IRQ_INITED 1
  30 #define HNS_BUFFER_SIZE_2048 2048
  31
  32 #define BD_MAX_SEND_SIZE 8191
  33 #define SKB_TMP_LEN(SKB) \
  34         (((SKB)->transport_header - (SKB)->mac_header) + tcp_hdrlen(SKB))
  35
  36 static void fill_v2_desc_hw(struct hnae_ring *ring, void *priv, int size,
  37                             int send_sz, dma_addr_t dma, int frag_end,
  38                             int buf_num, enum hns_desc_type type, int mtu)
  39 {
  40         struct hnae_desc *desc = &ring->desc[ring->next_to_use];
  41         struct hnae_desc_cb *desc_cb = &ring->desc_cb[ring->next_to_use];
  42         struct iphdr *iphdr;
  43         struct ipv6hdr *ipv6hdr;
  44         struct sk_buff *skb;
  45         __be16 protocol;
  46         u8 bn_pid = 0;
  47         u8 rrcfv = 0;
  48         u8 ip_offset = 0;
  49         u8 tvsvsn = 0;
  50         u16 mss = 0;
  51         u8 l4_len = 0;
  52         u16 paylen = 0;
  53
  54         desc_cb->priv = priv;
  55         desc_cb->length = size;
  56         desc_cb->dma = dma;
  57         desc_cb->type = type;
  58
  59         desc->addr = cpu_to_le64(dma);
  60         desc->tx.send_size = cpu_to_le16((u16)send_sz);
  61
  62         /* config bd buffer end */
  63         hnae_set_bit(rrcfv, HNSV2_TXD_VLD_B, 1);
  64         hnae_set_field(bn_pid, HNSV2_TXD_BUFNUM_M, 0, buf_num - 1);
  65
  66         /* fill port_id in the tx bd for sending management pkts */
  67         hnae_set_field(bn_pid, HNSV2_TXD_PORTID_M,
  68                        HNSV2_TXD_PORTID_S, ring->q->handle->dport_id);
  69
  70         if (type == DESC_TYPE_SKB) {
  71                 skb = (struct sk_buff *)priv;
  72
  73                 if (skb->ip_summed == CHECKSUM_PARTIAL) {
  74                         skb_reset_mac_len(skb);
  75                         protocol = skb->protocol;
  76                         ip_offset = ETH_HLEN;
  77
  78                         if (protocol == htons(ETH_P_8021Q)) {
  79                                 ip_offset += VLAN_HLEN;
  80                                 protocol = vlan_get_protocol(skb);
  81                                 skb->protocol = protocol;
  82                         }
  83
  84                         if (skb->protocol == htons(ETH_P_IP)) {
  85                                 iphdr = ip_hdr(skb);
  86                                 hnae_set_bit(rrcfv, HNSV2_TXD_L3CS_B, 1);
  87                                 hnae_set_bit(rrcfv, HNSV2_TXD_L4CS_B, 1);
  88
  89                                 /* check for tcp/udp header */
  90                                 if (iphdr->protocol == IPPROTO_TCP &&
  91                                     skb_is_gso(skb)) {
  92                                         hnae_set_bit(tvsvsn,
  93                                                      HNSV2_TXD_TSE_B, 1);
  94                                         l4_len = tcp_hdrlen(skb);
  95                                         mss = skb_shinfo(skb)->gso_size;
  96                                         paylen = skb->len - SKB_TMP_LEN(skb);
  97                                 }
  98                         } else if (skb->protocol == htons(ETH_P_IPV6)) {
  99                                 hnae_set_bit(tvsvsn, HNSV2_TXD_IPV6_B, 1);
 100                                 ipv6hdr = ipv6_hdr(skb);
 101                                 hnae_set_bit(rrcfv, HNSV2_TXD_L4CS_B, 1);
 102
 103                                 /* check for tcp/udp header */
 104                                 if (ipv6hdr->nexthdr == IPPROTO_TCP &&
 105                                     skb_is_gso(skb) && skb_is_gso_v6(skb)) {
 106                                         hnae_set_bit(tvsvsn,
 107                                                      HNSV2_TXD_TSE_B, 1);
 108                                         l4_len = tcp_hdrlen(skb);
 109                                         mss = skb_shinfo(skb)->gso_size;
 110                                         paylen = skb->len - SKB_TMP_LEN(skb);
 111                                 }
 112                         }
 113                         desc->tx.ip_offset = ip_offset;
 114                         desc->tx.tse_vlan_snap_v6_sctp_nth = tvsvsn;
 115                         desc->tx.mss = cpu_to_le16(mss);
 116                         desc->tx.l4_len = l4_len;
 117                         desc->tx.paylen = cpu_to_le16(paylen);
 118                 }
 119         }
 120
 121         hnae_set_bit(rrcfv, HNSV2_TXD_FE_B, frag_end);
 122
 123         desc->tx.bn_pid = bn_pid;
 124         desc->tx.ra_ri_cs_fe_vld = rrcfv;
 125
 126         ring_ptr_move_fw(ring, next_to_use);
 127 }
 128
 129 static void fill_v2_desc(struct hnae_ring *ring, void *priv,
 130                          int size, dma_addr_t dma, int frag_end,
 131                          int buf_num, enum hns_desc_type type, int mtu)
 132 {
 133         fill_v2_desc_hw(ring, priv, size, size, dma, frag_end,
 134                         buf_num, type, mtu);
 135 }
 136
 137 static const struct acpi_device_id hns_enet_acpi_match[] = {
 138         { "HISI00C1", 0 },
 139         { "HISI00C2", 0 },
 140         { },
 141 };
 142 MODULE_DEVICE_TABLE(acpi, hns_enet_acpi_match);
 143
 144 static void fill_desc(struct hnae_ring *ring, void *priv,
 145                       int size, dma_addr_t dma, int frag_end,
 146                       int buf_num, enum hns_desc_type type, int mtu)
 147 {
 148         struct hnae_desc *desc = &ring->desc[ring->next_to_use];
 149         struct hnae_desc_cb *desc_cb = &ring->desc_cb[ring->next_to_use];
 150         struct sk_buff *skb;
 151         __be16 protocol;
 152         u32 ip_offset;
 153         u32 asid_bufnum_pid = 0;
 154         u32 flag_ipoffset = 0;
 155
 156         desc_cb->priv = priv;
 157         desc_cb->length = size;
 158         desc_cb->dma = dma;
 159         desc_cb->type = type;
 160
 161         desc->addr = cpu_to_le64(dma);
 162         desc->tx.send_size = cpu_to_le16((u16)size);
 163
 164         /*config bd buffer end */
 165         flag_ipoffset |= 1 << HNS_TXD_VLD_B;
 166
 167         asid_bufnum_pid |= buf_num << HNS_TXD_BUFNUM_S;
 168
 169         if (type == DESC_TYPE_SKB) {
 170                 skb = (struct sk_buff *)priv;
 171
 172                 if (skb->ip_summed == CHECKSUM_PARTIAL) {
 173                         protocol = skb->protocol;
 174                         ip_offset = ETH_HLEN;
 175
 176                         /*if it is a SW VLAN check the next protocol*/
 177                         if (protocol == htons(ETH_P_8021Q)) {
 178                                 ip_offset += VLAN_HLEN;
 179                                 protocol = vlan_get_protocol(skb);
 180                                 skb->protocol = protocol;
 181                         }
 182
 183                         if (skb->protocol == htons(ETH_P_IP)) {
 184                                 flag_ipoffset |= 1 << HNS_TXD_L3CS_B;
 185                                 /* check for tcp/udp header */
 186                                 flag_ipoffset |= 1 << HNS_TXD_L4CS_B;
 187
 188                         } else if (skb->protocol == htons(ETH_P_IPV6)) {
 189                                 /* ipv6 has not l3 cs, check for L4 header */
 190                                 flag_ipoffset |= 1 << HNS_TXD_L4CS_B;
 191                         }
 192
 193                         flag_ipoffset |= ip_offset << HNS_TXD_IPOFFSET_S;
 194                 }
 195         }
 196
 197         flag_ipoffset |= frag_end << HNS_TXD_FE_B;
 198
 199         desc->tx.asid_bufnum_pid = cpu_to_le16(asid_bufnum_pid);
 200         desc->tx.flag_ipoffset = cpu_to_le32(flag_ipoffset);
 201
 202         ring_ptr_move_fw(ring, next_to_use);
 203 }
 204
 205 static void unfill_desc(struct hnae_ring *ring)
 206 {
 207         ring_ptr_move_bw(ring, next_to_use);
 208 }
 209
 210 static int hns_nic_maybe_stop_tx(
 211         struct sk_buff **out_skb, int *bnum, struct hnae_ring *ring)
 212 {
 213         struct sk_buff *skb = *out_skb;
 214         struct sk_buff *new_skb = NULL;
 215         int buf_num;
 216
 217         /* no. of segments (plus a header) */
 218         buf_num = skb_shinfo(skb)->nr_frags + 1;
 219
 220         if (unlikely(buf_num > ring->max_desc_num_per_pkt)) {
 221                 if (ring_space(ring) < 1)
 222                         return -EBUSY;
 223
 224                 new_skb = skb_copy(skb, GFP_ATOMIC);
 225                 if (!new_skb)
 226                         return -ENOMEM;
 227
 228                 dev_kfree_skb_any(skb);
 229                 *out_skb = new_skb;
 230                 buf_num = 1;
 231         } else if (buf_num > ring_space(ring)) {
 232                 return -EBUSY;
 233         }
 234
 235         *bnum = buf_num;
 236         return 0;
 237 }
 238
 239 static int hns_nic_maybe_stop_tso(
 240         struct sk_buff **out_skb, int *bnum, struct hnae_ring *ring)
 241 {
 242         int i;
 243         int size;
 244         int buf_num;
 245         int frag_num;
 246         struct sk_buff *skb = *out_skb;
 247         struct sk_buff *new_skb = NULL;
 248         struct skb_frag_struct *frag;
 249
 250         size = skb_headlen(skb);
 251         buf_num = (size + BD_MAX_SEND_SIZE - 1) / BD_MAX_SEND_SIZE;
 252
 253         frag_num = skb_shinfo(skb)->nr_frags;
 254         for (i = 0; i < frag_num; i++) {
 255                 frag = &skb_shinfo(skb)->frags[i];
 256                 size = skb_frag_size(frag);
 257                 buf_num += (size + BD_MAX_SEND_SIZE - 1) / BD_MAX_SEND_SIZE;
 258         }
 259
 260         if (unlikely(buf_num > ring->max_desc_num_per_pkt)) {
 261                 buf_num = (skb->len + BD_MAX_SEND_SIZE - 1) / BD_MAX_SEND_SIZE;
 262                 if (ring_space(ring) < buf_num)
 263                         return -EBUSY;
 264                 /* manual split the send packet */
 265                 new_skb = skb_copy(skb, GFP_ATOMIC);
 266                 if (!new_skb)
 267                         return -ENOMEM;
 268                 dev_kfree_skb_any(skb);
 269                 *out_skb = new_skb;
 270
 271         } else if (ring_space(ring) < buf_num) {
 272                 return -EBUSY;
 273         }
 274
 275         *bnum = buf_num;
 276         return 0;
 277 }
 278
 279 static void fill_tso_desc(struct hnae_ring *ring, void *priv,
 280                           int size, dma_addr_t dma, int frag_end,
 281                           int buf_num, enum hns_desc_type type, int mtu)
 282 {
 283         int frag_buf_num;
 284         int sizeoflast;
 285         int k;
 286
 287         frag_buf_num = (size + BD_MAX_SEND_SIZE - 1) / BD_MAX_SEND_SIZE;
 288         sizeoflast = size % BD_MAX_SEND_SIZE;
 289         sizeoflast = sizeoflast ? sizeoflast : BD_MAX_SEND_SIZE;
 290
 291         /* when the frag size is bigger than hardware, split this frag */
 292         for (k = 0; k < frag_buf_num; k++)
 293                 fill_v2_desc_hw(ring, priv, k == 0 ? size : 0,
 294                                 (k == frag_buf_num - 1) ?
 295                                         sizeoflast : BD_MAX_SEND_SIZE,
 296                                 dma + BD_MAX_SEND_SIZE * k,
 297                                 frag_end && (k == frag_buf_num - 1) ? 1 : 0,
 298                                 buf_num,
 299                                 (type == DESC_TYPE_SKB && !k) ?
 300                                         DESC_TYPE_SKB : DESC_TYPE_PAGE,
 301                                 mtu);
 302 }
 303
 304 netdev_tx_t hns_nic_net_xmit_hw(struct net_device *ndev,
 305                                 struct sk_buff *skb,
 306                                 struct hns_nic_ring_data *ring_data)
 307 {
 308         struct hns_nic_priv *priv = netdev_priv(ndev);
 309         struct hnae_ring *ring = ring_data->ring;
 310         struct device *dev = ring_to_dev(ring);
 311         struct netdev_queue *dev_queue;
 312         struct skb_frag_struct *frag;
 313         int buf_num;
 314         int seg_num;
 315         dma_addr_t dma;
 316         int size, next_to_use;
 317         int i;
 318
 319         switch (priv->ops.maybe_stop_tx(&skb, &buf_num, ring)) {
 320         case -EBUSY:
 321                 ring->stats.tx_busy++;
 322                 goto out_net_tx_busy;
 323         case -ENOMEM:
 324                 ring->stats.sw_err_cnt++;
 325                 netdev_err(ndev, "no memory to xmit!\n");
 326                 goto out_err_tx_ok;
 327         default:
 328                 break;
 329         }
 330
 331         /* no. of segments (plus a header) */
 332         seg_num = skb_shinfo(skb)->nr_frags + 1;
 333         next_to_use = ring->next_to_use;
 334
 335         /* fill the first part */
 336         size = skb_headlen(skb);
 337         dma = dma_map_single(dev, skb->data, size, DMA_TO_DEVICE);
 338         if (dma_mapping_error(dev, dma)) {
 339                 netdev_err(ndev, "TX head DMA map failed\n");
 340                 ring->stats.sw_err_cnt++;
 341                 goto out_err_tx_ok;
 342         }
 343         priv->ops.fill_desc(ring, skb, size, dma, seg_num == 1 ? 1 : 0,
 344                             buf_num, DESC_TYPE_SKB, ndev->mtu);
 345
 346         /* fill the fragments */
 347         for (i = 1; i < seg_num; i++) {
 348                 frag = &skb_shinfo(skb)->frags[i - 1];
 349                 size = skb_frag_size(frag);
 350                 dma = skb_frag_dma_map(dev, frag, 0, size, DMA_TO_DEVICE);
 351                 if (dma_mapping_error(dev, dma)) {
 352                         netdev_err(ndev, "TX frag(%d) DMA map failed\n", i);
 353                         ring->stats.sw_err_cnt++;
 354                         goto out_map_frag_fail;
 355                 }
 356                 priv->ops.fill_desc(ring, skb_frag_page(frag), size, dma,
 357                                     seg_num - 1 == i ? 1 : 0, buf_num,
 358                                     DESC_TYPE_PAGE, ndev->mtu);
 359         }
 360
 361         /*complete translate all packets*/
 362         dev_queue = netdev_get_tx_queue(ndev, skb->queue_mapping);
 363         netdev_tx_sent_queue(dev_queue, skb->len);
 364
 365         netif_trans_update(ndev);
 366         ndev->stats.tx_bytes += skb->len;
 367         ndev->stats.tx_packets++;
 368
 369         wmb(); /* commit all data before submit */
 370         assert(skb->queue_mapping < priv->ae_handle->q_num);
 371         hnae_queue_xmit(priv->ae_handle->qs[skb->queue_mapping], buf_num);
 372
 373         return NETDEV_TX_OK;
 374
 375 out_map_frag_fail:
 376
 377         while (ring->next_to_use != next_to_use) {
 378                 unfill_desc(ring);
 379                 if (ring->next_to_use != next_to_use)
 380                         dma_unmap_page(dev,
 381                                        ring->desc_cb[ring->next_to_use].dma,
 382                                        ring->desc_cb[ring->next_to_use].length,
 383                                        DMA_TO_DEVICE);
 384                 else
 385                         dma_unmap_single(dev,
 386                                          ring->desc_cb[next_to_use].dma,
 387                                          ring->desc_cb[next_to_use].length,
 388                                          DMA_TO_DEVICE);
 389         }
 390
 391 out_err_tx_ok:
 392
 393         dev_kfree_skb_any(skb);
 394         return NETDEV_TX_OK;
 395
 396 out_net_tx_busy:
 397
 398         netif_stop_subqueue(ndev, skb->queue_mapping);
 399
 400         /* Herbert's original patch had:
 401          *  smp_mb__after_netif_stop_queue();
 402          * but since that doesn't exist yet, just open code it.
 403          */
 404         smp_mb();
 405         return NETDEV_TX_BUSY;
 406 }
 407
 408 static void hns_nic_reuse_page(struct sk_buff *skb, int i,
 409                                struct hnae_ring *ring, int pull_len,
 410                                struct hnae_desc_cb *desc_cb)
 411 {
 412         struct hnae_desc *desc;
 413         u32 truesize;
 414         int size;
 415         int last_offset;
 416         bool twobufs;
 417
 418         twobufs = ((PAGE_SIZE < 8192) &&
 419                 hnae_buf_size(ring) == HNS_BUFFER_SIZE_2048);
 420
 421         desc = &ring->desc[ring->next_to_clean];
 422         size = le16_to_cpu(desc->rx.size);
 423
 424         if (twobufs) {
 425                 truesize = hnae_buf_size(ring);
 426         } else {
 427                 truesize = ALIGN(size, L1_CACHE_BYTES);
 428                 last_offset = hnae_page_size(ring) - hnae_buf_size(ring);
 429         }
 430
 431         skb_add_rx_frag(skb, i, desc_cb->priv, desc_cb->page_offset + pull_len,
 432                         size - pull_len, truesize);
 433
 434          /* avoid re-using remote pages,flag default unreuse */
 435         if (unlikely(page_to_nid(desc_cb->priv) != numa_node_id()))
 436                 return;
 437
 438         if (twobufs) {
 439                 /* if we are only owner of page we can reuse it */
 440                 if (likely(page_count(desc_cb->priv) == 1)) {
 441                         /* flip page offset to other buffer */
 442                         desc_cb->page_offset ^= truesize;
 443
 444                         desc_cb->reuse_flag = 1;
 445                         /* bump ref count on page before it is given*/
 446                         get_page(desc_cb->priv);
 447                 }
 448                 return;
 449         }
 450
 451         /* move offset up to the next cache line */
 452         desc_cb->page_offset += truesize;
 453
 454         if (desc_cb->page_offset <= last_offset) {
 455                 desc_cb->reuse_flag = 1;
 456                 /* bump ref count on page before it is given*/
 457                 get_page(desc_cb->priv);
 458         }
 459 }
 460
 461 static void get_v2rx_desc_bnum(u32 bnum_flag, int *out_bnum)
 462 {
 463         *out_bnum = hnae_get_field(bnum_flag,
 464                                    HNS_RXD_BUFNUM_M, HNS_RXD_BUFNUM_S) + 1;
 465 }
 466
 467 static void get_rx_desc_bnum(u32 bnum_flag, int *out_bnum)
 468 {
 469         *out_bnum = hnae_get_field(bnum_flag,
 470                                    HNS_RXD_BUFNUM_M, HNS_RXD_BUFNUM_S);
 471 }
 472
 473 static void hns_nic_rx_checksum(struct hns_nic_ring_data *ring_data,
 474                                 struct sk_buff *skb, u32 flag)
 475 {
 476         struct net_device *netdev = ring_data->napi.dev;
 477         u32 l3id;
 478         u32 l4id;
 479
 480         /* check if RX checksum offload is enabled */
 481         if (unlikely(!(netdev->features & NETIF_F_RXCSUM)))
 482                 return;
 483
 484         /* In hardware, we only support checksum for the following protocols:
 485          * 1) IPv4,
 486          * 2) TCP(over IPv4 or IPv6),
 487          * 3) UDP(over IPv4 or IPv6),
 488          * 4) SCTP(over IPv4 or IPv6)
 489          * but we support many L3(IPv4, IPv6, MPLS, PPPoE etc) and L4(TCP,
 490          * UDP, GRE, SCTP, IGMP, ICMP etc.) protocols.
 491          *
 492          * Hardware limitation:
 493          * Our present hardware RX Descriptor lacks L3/L4 checksum "Status &
 494          * Error" bit (which usually can be used to indicate whether checksum
 495          * was calculated by the hardware and if there was any error encountered
 496          * during checksum calculation).
 497          *
 498          * Software workaround:
 499          * We do get info within the RX descriptor about the kind of L3/L4
 500          * protocol coming in the packet and the error status. These errors
 501          * might not just be checksum errors but could be related to version,
 502          * length of IPv4, UDP, TCP etc.
 503          * Because there is no-way of knowing if it is a L3/L4 error due to bad
 504          * checksum or any other L3/L4 error, we will not (cannot) convey
 505          * checksum status for such cases to upper stack and will not maintain
 506          * the RX L3/L4 checksum counters as well.
 507          */
 508
 509         l3id = hnae_get_field(flag, HNS_RXD_L3ID_M, HNS_RXD_L3ID_S);
 510         l4id = hnae_get_field(flag, HNS_RXD_L4ID_M, HNS_RXD_L4ID_S);
 511
 512         /*  check L3 protocol for which checksum is supported */
 513         if ((l3id != HNS_RX_FLAG_L3ID_IPV4) && (l3id != HNS_RX_FLAG_L3ID_IPV6))
 514                 return;
 515
 516         /* check for any(not just checksum)flagged L3 protocol errors */
 517         if (unlikely(hnae_get_bit(flag, HNS_RXD_L3E_B)))
 518                 return;
 519
 520         /* we do not support checksum of fragmented packets */
 521         if (unlikely(hnae_get_bit(flag, HNS_RXD_FRAG_B)))
 522                 return;
 523
 524         /*  check L4 protocol for which checksum is supported */
 525         if ((l4id != HNS_RX_FLAG_L4ID_TCP) &&
 526             (l4id != HNS_RX_FLAG_L4ID_UDP) &&
 527             (l4id != HNS_RX_FLAG_L4ID_SCTP))
 528                 return;
 529
 530         /* check for any(not just checksum)flagged L4 protocol errors */
 531         if (unlikely(hnae_get_bit(flag, HNS_RXD_L4E_B)))
 532                 return;
 533
 534         /* now, this has to be a packet with valid RX checksum */
 535         skb->ip_summed = CHECKSUM_UNNECESSARY;
 536 }
 537
 538 static int hns_nic_poll_rx_skb(struct hns_nic_ring_data *ring_data,
 539                                struct sk_buff **out_skb, int *out_bnum)
 540 {
 541         struct hnae_ring *ring = ring_data->ring;
 542         struct net_device *ndev = ring_data->napi.dev;
 543         struct hns_nic_priv *priv = netdev_priv(ndev);
 544         struct sk_buff *skb;
 545         struct hnae_desc *desc;
 546         struct hnae_desc_cb *desc_cb;
 547         unsigned char *va;
 548         int bnum, length, i;
 549         int pull_len;
 550         u32 bnum_flag;
 551
 552         desc = &ring->desc[ring->next_to_clean];
 553         desc_cb = &ring->desc_cb[ring->next_to_clean];
 554
 555         prefetch(desc);
 556
 557         va = (unsigned char *)desc_cb->buf + desc_cb->page_offset;
 558
 559         /* prefetch first cache line of first page */
 560         prefetch(va);
 561 #if L1_CACHE_BYTES < 128
 562         prefetch(va + L1_CACHE_BYTES);
 563 #endif
 564
 565         skb = *out_skb = napi_alloc_skb(&ring_data->napi,
 566                                         HNS_RX_HEAD_SIZE);
 567         if (unlikely(!skb)) {
 568                 netdev_err(ndev, "alloc rx skb fail\n");
 569                 ring->stats.sw_err_cnt++;
 570                 return -ENOMEM;
 571         }
 572
 573         prefetchw(skb->data);
 574         length = le16_to_cpu(desc->rx.pkt_len);
 575         bnum_flag = le32_to_cpu(desc->rx.ipoff_bnum_pid_flag);
 576         priv->ops.get_rxd_bnum(bnum_flag, &bnum);
 577         *out_bnum = bnum;
 578
 579         if (length <= HNS_RX_HEAD_SIZE) {
 580                 memcpy(__skb_put(skb, length), va, ALIGN(length, sizeof(long)));
 581
 582                 /* we can reuse buffer as-is, just make sure it is local */
 583                 if (likely(page_to_nid(desc_cb->priv) == numa_node_id()))
 584                         desc_cb->reuse_flag = 1;
 585                 else /* this page cannot be reused so discard it */
 586                         put_page(desc_cb->priv);
 587
 588                 ring_ptr_move_fw(ring, next_to_clean);
 589
 590                 if (unlikely(bnum != 1)) { /* check err*/
 591                         *out_bnum = 1;
 592                         goto out_bnum_err;
 593                 }
 594         } else {
 595                 ring->stats.seg_pkt_cnt++;
 596
 597                 pull_len = eth_get_headlen(ndev, va, HNS_RX_HEAD_SIZE);
 598                 memcpy(__skb_put(skb, pull_len), va,
 599                        ALIGN(pull_len, sizeof(long)));
 600
 601                 hns_nic_reuse_page(skb, 0, ring, pull_len, desc_cb);
 602                 ring_ptr_move_fw(ring, next_to_clean);
 603
 604                 if (unlikely(bnum >= (int)MAX_SKB_FRAGS)) { /* check err*/
 605                         *out_bnum = 1;
 606                         goto out_bnum_err;
 607                 }
 608                 for (i = 1; i < bnum; i++) {
 609                         desc = &ring->desc[ring->next_to_clean];
 610                         desc_cb = &ring->desc_cb[ring->next_to_clean];
 611
 612                         hns_nic_reuse_page(skb, i, ring, 0, desc_cb);
 613                         ring_ptr_move_fw(ring, next_to_clean);
 614                 }
 615         }
 616
 617         /* check except process, free skb and jump the desc */
 618         if (unlikely((!bnum) || (bnum > ring->max_desc_num_per_pkt))) {
 619 out_bnum_err:
 620                 *out_bnum = *out_bnum ? *out_bnum : 1; /* ntc moved,cannot 0*/
 621                 netdev_err(ndev, "invalid bnum(%d,%d,%d,%d),%016llx,%016llx\n",
 622                            bnum, ring->max_desc_num_per_pkt,
 623                            length, (int)MAX_SKB_FRAGS,
 624                            ((u64 *)desc)[0], ((u64 *)desc)[1]);
 625                 ring->stats.err_bd_num++;
 626                 dev_kfree_skb_any(skb);
 627                 return -EDOM;
 628         }
 629
 630         bnum_flag = le32_to_cpu(desc->rx.ipoff_bnum_pid_flag);
 631
 632         if (unlikely(!hnae_get_bit(bnum_flag, HNS_RXD_VLD_B))) {
 633                 netdev_err(ndev, "no valid bd,%016llx,%016llx\n",
 634                            ((u64 *)desc)[0], ((u64 *)desc)[1]);
 635                 ring->stats.non_vld_descs++;
 636                 dev_kfree_skb_any(skb);
 637                 return -EINVAL;
 638         }
 639
 640         if (unlikely((!desc->rx.pkt_len) ||
 641                      hnae_get_bit(bnum_flag, HNS_RXD_DROP_B))) {
 642                 ring->stats.err_pkt_len++;
 643                 dev_kfree_skb_any(skb);
 644                 return -EFAULT;
 645         }
 646
 647         if (unlikely(hnae_get_bit(bnum_flag, HNS_RXD_L2E_B))) {
 648                 ring->stats.l2_err++;
 649                 dev_kfree_skb_any(skb);
 650                 return -EFAULT;
 651         }
 652
 653         ring->stats.rx_pkts++;
 654         ring->stats.rx_bytes += skb->len;
 655
 656         /* indicate to upper stack if our hardware has already calculated
 657          * the RX checksum
 658          */
 659         hns_nic_rx_checksum(ring_data, skb, bnum_flag);
 660
 661         return 0;
 662 }
 663
 664 static void
 665 hns_nic_alloc_rx_buffers(struct hns_nic_ring_data *ring_data, int cleand_count)
 666 {
 667         int i, ret;
 668         struct hnae_desc_cb res_cbs;
 669         struct hnae_desc_cb *desc_cb;
 670         struct hnae_ring *ring = ring_data->ring;
 671         struct net_device *ndev = ring_data->napi.dev;
 672
 673         for (i = 0; i < cleand_count; i++) {
 674                 desc_cb = &ring->desc_cb[ring->next_to_use];
 675                 if (desc_cb->reuse_flag) {
 676                         ring->stats.reuse_pg_cnt++;
 677                         hnae_reuse_buffer(ring, ring->next_to_use);
 678                 } else {
 679                         ret = hnae_reserve_buffer_map(ring, &res_cbs);
 680                         if (ret) {
 681                                 ring->stats.sw_err_cnt++;
 682                                 netdev_err(ndev, "hnae reserve buffer map failed.\n");
 683                                 break;
 684                         }
 685                         hnae_replace_buffer(ring, ring->next_to_use, &res_cbs);
 686                 }
 687
 688                 ring_ptr_move_fw(ring, next_to_use);
 689         }
 690
 691         wmb(); /* make all data has been write before submit */
 692         writel_relaxed(i, ring->io_base + RCB_REG_HEAD);
 693 }
 694
 695 /* return error number for error or number of desc left to take
 696  */
 697 static void hns_nic_rx_up_pro(struct hns_nic_ring_data *ring_data,
 698                               struct sk_buff *skb)
 699 {
 700         struct net_device *ndev = ring_data->napi.dev;
 701
 702         skb->protocol = eth_type_trans(skb, ndev);
 703         (void)napi_gro_receive(&ring_data->napi, skb);
 704 }
 705
 706 static int hns_desc_unused(struct hnae_ring *ring)
 707 {
 708         int ntc = ring->next_to_clean;
 709         int ntu = ring->next_to_use;
 710
 711         return ((ntc >= ntu) ? 0 : ring->desc_num) + ntc - ntu;
 712 }
 713
 714 #define HNS_LOWEST_LATENCY_RATE         27      /* 27 MB/s */
 715 #define HNS_LOW_LATENCY_RATE                    80      /* 80 MB/s */
 716
 717 #define HNS_COAL_BDNUM                  3
 718
 719 static u32 hns_coal_rx_bdnum(struct hnae_ring *ring)
 720 {
 721         bool coal_enable = ring->q->handle->coal_adapt_en;
 722
 723         if (coal_enable &&
 724             ring->coal_last_rx_bytes > HNS_LOWEST_LATENCY_RATE)
 725                 return HNS_COAL_BDNUM;
 726         else
 727                 return 0;
 728 }
 729
 730 static void hns_update_rx_rate(struct hnae_ring *ring)
 731 {
 732         bool coal_enable = ring->q->handle->coal_adapt_en;
 733         u32 time_passed_ms;
 734         u64 total_bytes;
 735
 736         if (!coal_enable ||
 737             time_before(jiffies, ring->coal_last_jiffies + (HZ >> 4)))
 738                 return;
 739
 740         /* ring->stats.rx_bytes overflowed */
 741         if (ring->coal_last_rx_bytes > ring->stats.rx_bytes) {
 742                 ring->coal_last_rx_bytes = ring->stats.rx_bytes;
 743                 ring->coal_last_jiffies = jiffies;
 744                 return;
 745         }
 746
 747         total_bytes = ring->stats.rx_bytes - ring->coal_last_rx_bytes;
 748         time_passed_ms = jiffies_to_msecs(jiffies - ring->coal_last_jiffies);
 749         do_div(total_bytes, time_passed_ms);
 750         ring->coal_rx_rate = total_bytes >> 10;
 751
 752         ring->coal_last_rx_bytes = ring->stats.rx_bytes;
 753         ring->coal_last_jiffies = jiffies;
 754 }
 755
 756 /**
 757  * smooth_alg - smoothing algrithm for adjusting coalesce parameter
 758  **/
 759 static u32 smooth_alg(u32 new_param, u32 old_param)
 760 {
 761         u32 gap = (new_param > old_param) ? new_param - old_param
 762                                           : old_param - new_param;
 763
 764         if (gap > 8)
 765                 gap >>= 3;
 766
 767         if (new_param > old_param)
 768                 return old_param + gap;
 769         else
 770                 return old_param - gap;
 771 }
 772
 773 /**
 774  * hns_nic_adp_coalesce - self adapte coalesce according to rx rate
 775  * @ring_data: pointer to hns_nic_ring_data
 776  **/
 777 static void hns_nic_adpt_coalesce(struct hns_nic_ring_data *ring_data)
 778 {
 779         struct hnae_ring *ring = ring_data->ring;
 780         struct hnae_handle *handle = ring->q->handle;
 781         u32 new_coal_param, old_coal_param = ring->coal_param;
 782
 783         if (ring->coal_rx_rate < HNS_LOWEST_LATENCY_RATE)
 784                 new_coal_param = HNAE_LOWEST_LATENCY_COAL_PARAM;
 785         else if (ring->coal_rx_rate < HNS_LOW_LATENCY_RATE)
 786                 new_coal_param = HNAE_LOW_LATENCY_COAL_PARAM;
 787         else
 788                 new_coal_param = HNAE_BULK_LATENCY_COAL_PARAM;
 789
 790         if (new_coal_param == old_coal_param &&
 791             new_coal_param == handle->coal_param)
 792                 return;
 793
 794         new_coal_param = smooth_alg(new_coal_param, old_coal_param);
 795         ring->coal_param = new_coal_param;
 796
 797         /**
 798          * Because all ring in one port has one coalesce param, when one ring
 799          * calculate its own coalesce param, it cannot write to hardware at
 800          * once. There are three conditions as follows:
 801          *       1. current ring's coalesce param is larger than the hardware.
 802          *       2. or ring which adapt last time can change again.
 803          *       3. timeout.
 804          */
 805         if (new_coal_param == handle->coal_param) {
 806                 handle->coal_last_jiffies = jiffies;
 807                 handle->coal_ring_idx = ring_data->queue_index;
 808         } else if (new_coal_param > handle->coal_param ||
 809                    handle->coal_ring_idx == ring_data->queue_index ||
 810                    time_after(jiffies, handle->coal_last_jiffies + (HZ >> 4))) {
 811                 handle->dev->ops->set_coalesce_usecs(handle,
 812                                         new_coal_param);
 813                 handle->dev->ops->set_coalesce_frames(handle,
 814                                         1, new_coal_param);
 815                 handle->coal_param = new_coal_param;
 816                 handle->coal_ring_idx = ring_data->queue_index;
 817                 handle->coal_last_jiffies = jiffies;
 818         }
 819 }
 820
 821 static int hns_nic_rx_poll_one(struct hns_nic_ring_data *ring_data,
 822                                int budget, void *v)
 823 {
 824         struct hnae_ring *ring = ring_data->ring;
 825         struct sk_buff *skb;
 826         int num, bnum;
 827 #define RCB_NOF_ALLOC_RX_BUFF_ONCE 16
 828         int recv_pkts, recv_bds, clean_count, err;
 829         int unused_count = hns_desc_unused(ring);
 830
 831         num = readl_relaxed(ring->io_base + RCB_REG_FBDNUM);
 832         rmb(); /* make sure num taken effect before the other data is touched */
 833
 834         recv_pkts = 0, recv_bds = 0, clean_count = 0;
 835         num -= unused_count;
 836
 837         while (recv_pkts < budget && recv_bds < num) {
 838                 /* reuse or realloc buffers */
 839                 if (clean_count + unused_count >= RCB_NOF_ALLOC_RX_BUFF_ONCE) {
 840                         hns_nic_alloc_rx_buffers(ring_data,
 841                                                  clean_count + unused_count);
 842                         clean_count = 0;
 843                         unused_count = hns_desc_unused(ring);
 844                 }
 845
 846                 /* poll one pkt */
 847                 err = hns_nic_poll_rx_skb(ring_data, &skb, &bnum);
 848                 if (unlikely(!skb)) /* this fault cannot be repaired */
 849                         goto out;
 850
 851                 recv_bds += bnum;
 852                 clean_count += bnum;
 853                 if (unlikely(err)) {  /* do jump the err */
 854                         recv_pkts++;
 855                         continue;
 856                 }
 857
 858                 /* do update ip stack process*/
 859                 ((void (*)(struct hns_nic_ring_data *, struct sk_buff *))v)(
 860                                                         ring_data, skb);
 861                 recv_pkts++;
 862         }
 863
 864 out:
 865         /* make all data has been write before submit */
 866         if (clean_count + unused_count > 0)
 867                 hns_nic_alloc_rx_buffers(ring_data,
 868                                          clean_count + unused_count);
 869
 870         return recv_pkts;
 871 }
 872
 873 static bool hns_nic_rx_fini_pro(struct hns_nic_ring_data *ring_data)
 874 {
 875         struct hnae_ring *ring = ring_data->ring;
 876         int num = 0;
 877         bool rx_stopped;
 878
 879         hns_update_rx_rate(ring);
 880
 881         /* for hardware bug fixed */
 882         ring_data->ring->q->handle->dev->ops->toggle_ring_irq(ring, 0);
 883         num = readl_relaxed(ring->io_base + RCB_REG_FBDNUM);
 884
 885         if (num <= hns_coal_rx_bdnum(ring)) {
 886                 if (ring->q->handle->coal_adapt_en)
 887                         hns_nic_adpt_coalesce(ring_data);
 888
 889                 rx_stopped = true;
 890         } else {
 891                 ring_data->ring->q->handle->dev->ops->toggle_ring_irq(
 892                         ring_data->ring, 1);
 893
 894                 rx_stopped = false;
 895         }
 896
 897         return rx_stopped;
 898 }
 899
 900 static bool hns_nic_rx_fini_pro_v2(struct hns_nic_ring_data *ring_data)
 901 {
 902         struct hnae_ring *ring = ring_data->ring;
 903         int num;
 904
 905         hns_update_rx_rate(ring);
 906         num = readl_relaxed(ring->io_base + RCB_REG_FBDNUM);
 907
 908         if (num <= hns_coal_rx_bdnum(ring)) {
 909                 if (ring->q->handle->coal_adapt_en)
 910                         hns_nic_adpt_coalesce(ring_data);
 911
 912                 return true;
 913         }
 914
 915         return false;
 916 }
 917
 918 static inline void hns_nic_reclaim_one_desc(struct hnae_ring *ring,
 919                                             int *bytes, int *pkts)
 920 {
 921         struct hnae_desc_cb *desc_cb = &ring->desc_cb[ring->next_to_clean];
 922
 923         (*pkts) += (desc_cb->type == DESC_TYPE_SKB);
 924         (*bytes) += desc_cb->length;
 925         /* desc_cb will be cleaned, after hnae_free_buffer_detach*/
 926         hnae_free_buffer_detach(ring, ring->next_to_clean);
 927
 928         ring_ptr_move_fw(ring, next_to_clean);
 929 }
 930
 931 static int is_valid_clean_head(struct hnae_ring *ring, int h)
 932 {
 933         int u = ring->next_to_use;
 934         int c = ring->next_to_clean;
 935
 936         if (unlikely(h > ring->desc_num))
 937                 return 0;
 938
 939         assert(u > 0 && u < ring->desc_num);
 940         assert(c > 0 && c < ring->desc_num);
 941         assert(u != c && h != c); /* must be checked before call this func */
 942
 943         return u > c ? (h > c && h <= u) : (h > c || h <= u);
 944 }
 945
 946 /* reclaim all desc in one budget
 947  * return error or number of desc left
 948  */
 949 static int hns_nic_tx_poll_one(struct hns_nic_ring_data *ring_data,
 950                                int budget, void *v)
 951 {
 952         struct hnae_ring *ring = ring_data->ring;
 953         struct net_device *ndev = ring_data->napi.dev;
 954         struct netdev_queue *dev_queue;
 955         struct hns_nic_priv *priv = netdev_priv(ndev);
 956         int head;
 957         int bytes, pkts;
 958
 959         head = readl_relaxed(ring->io_base + RCB_REG_HEAD);
 960         rmb(); /* make sure head is ready before touch any data */
 961
 962         if (is_ring_empty(ring) || head == ring->next_to_clean)
 963                 return 0; /* no data to poll */
 964
 965         if (!is_valid_clean_head(ring, head)) {
 966                 netdev_err(ndev, "wrong head (%d, %d-%d)\n", head,
 967                            ring->next_to_use, ring->next_to_clean);
 968                 ring->stats.io_err_cnt++;
 969                 return -EIO;
 970         }
 971
 972         bytes = 0;
 973         pkts = 0;
 974         while (head != ring->next_to_clean) {
 975                 hns_nic_reclaim_one_desc(ring, &bytes, &pkts);
 976                 /* issue prefetch for next Tx descriptor */
 977                 prefetch(&ring->desc_cb[ring->next_to_clean]);
 978         }
 979         /* update tx ring statistics. */
 980         ring->stats.tx_pkts += pkts;
 981         ring->stats.tx_bytes += bytes;
 982
 983         dev_queue = netdev_get_tx_queue(ndev, ring_data->queue_index);
 984         netdev_tx_completed_queue(dev_queue, pkts, bytes);
 985
 986         if (unlikely(priv->link && !netif_carrier_ok(ndev)))
 987                 netif_carrier_on(ndev);
 988
 989         if (unlikely(pkts && netif_carrier_ok(ndev) &&
 990                      (ring_space(ring) >= ring->max_desc_num_per_pkt * 2))) {
 991                 /* Make sure that anybody stopping the queue after this
 992                  * sees the new next_to_clean.
 993                  */
 994                 smp_mb();
 995                 if (netif_tx_queue_stopped(dev_queue) &&
 996                     !test_bit(NIC_STATE_DOWN, &priv->state)) {
 997                         netif_tx_wake_queue(dev_queue);
 998                         ring->stats.restart_queue++;
 999                 }
1000         }
1001         return 0;
1002 }
1003
1004 static bool hns_nic_tx_fini_pro(struct hns_nic_ring_data *ring_data)
1005 {
1006         struct hnae_ring *ring = ring_data->ring;
1007         int head;
1008
1009         ring_data->ring->q->handle->dev->ops->toggle_ring_irq(ring, 0);
1010
1011         head = readl_relaxed(ring->io_base + RCB_REG_HEAD);
1012
1013         if (head != ring->next_to_clean) {
1014                 ring_data->ring->q->handle->dev->ops->toggle_ring_irq(
1015                         ring_data->ring, 1);
1016
1017                 return false;
1018         } else {
1019                 return true;
1020         }
1021 }
1022
1023 static bool hns_nic_tx_fini_pro_v2(struct hns_nic_ring_data *ring_data)
1024 {
1025         struct hnae_ring *ring = ring_data->ring;
1026         int head = readl_relaxed(ring->io_base + RCB_REG_HEAD);
1027
1028         if (head == ring->next_to_clean)
1029                 return true;
1030         else
1031                 return false;
1032 }
1033
1034 static void hns_nic_tx_clr_all_bufs(struct hns_nic_ring_data *ring_data)
1035 {
1036         struct hnae_ring *ring = ring_data->ring;
1037         struct net_device *ndev = ring_data->napi.dev;
1038         struct netdev_queue *dev_queue;
1039         int head;
1040         int bytes, pkts;
1041
1042         head = ring->next_to_use; /* ntu :soft setted ring position*/
1043         bytes = 0;
1044         pkts = 0;
1045         while (head != ring->next_to_clean)
1046                 hns_nic_reclaim_one_desc(ring, &bytes, &pkts);
1047
1048         dev_queue = netdev_get_tx_queue(ndev, ring_data->queue_index);
1049         netdev_tx_reset_queue(dev_queue);
1050 }
1051
1052 static int hns_nic_common_poll(struct napi_struct *napi, int budget)
1053 {
1054         int clean_complete = 0;
1055         struct hns_nic_ring_data *ring_data =
1056                 container_of(napi, struct hns_nic_ring_data, napi);
1057         struct hnae_ring *ring = ring_data->ring;
1058
1059 try_again:
1060         clean_complete += ring_data->poll_one(
1061                                 ring_data, budget - clean_complete,
1062                                 ring_data->ex_process);
1063
1064         if (clean_complete < budget) {
1065                 if (ring_data->fini_process(ring_data)) {
1066                         napi_complete(napi);
1067                         ring->q->handle->dev->ops->toggle_ring_irq(ring, 0);
1068                 } else {
1069                         goto try_again;
1070                 }
1071         }
1072
1073         return clean_complete;
1074 }
1075
1076 static irqreturn_t hns_irq_handle(int irq, void *dev)
1077 {
1078         struct hns_nic_ring_data *ring_data = (struct hns_nic_ring_data *)dev;
1079
1080         ring_data->ring->q->handle->dev->ops->toggle_ring_irq(
1081                 ring_data->ring, 1);
1082         napi_schedule(&ring_data->napi);
1083
1084         return IRQ_HANDLED;
1085 }
1086
1087 /**
1088  *hns_nic_adjust_link - adjust net work mode by the phy stat or new param
1089  *@ndev: net device
1090  */
1091 static void hns_nic_adjust_link(struct net_device *ndev)
1092 {
1093         struct hns_nic_priv *priv = netdev_priv(ndev);
1094         struct hnae_handle *h = priv->ae_handle;
1095         int state = 1;
1096
1097         /* If there is no phy, do not need adjust link */
1098         if (ndev->phydev) {
1099                 /* When phy link down, do nothing */
1100                 if (ndev->phydev->link == 0)
1101                         return;
1102
1103                 if (h->dev->ops->need_adjust_link(h, ndev->phydev->speed,
1104                                                   ndev->phydev->duplex)) {
1105                         /* because Hi161X chip don't support to change gmac
1106                          * speed and duplex with traffic. Delay 200ms to
1107                          * make sure there is no more data in chip FIFO.
1108                          */
1109                         netif_carrier_off(ndev);
1110                         msleep(200);
1111                         h->dev->ops->adjust_link(h, ndev->phydev->speed,
1112                                                  ndev->phydev->duplex);
1113                         netif_carrier_on(ndev);
1114                 }
1115         }
1116
1117         state = state && h->dev->ops->get_status(h);
1118
1119         if (state != priv->link) {
1120                 if (state) {
1121                         netif_carrier_on(ndev);
1122                         netif_tx_wake_all_queues(ndev);
1123                         netdev_info(ndev, "link up\n");
1124                 } else {
1125                         netif_carrier_off(ndev);
1126                         netdev_info(ndev, "link down\n");
1127                 }
1128                 priv->link = state;
1129         }
1130 }
1131
1132 /**
1133  *hns_nic_init_phy - init phy
1134  *@ndev: net device
1135  *@h: ae handle
1136  * Return 0 on success, negative on failure
1137  */
1138 int hns_nic_init_phy(struct net_device *ndev, struct hnae_handle *h)
1139 {
1140         __ETHTOOL_DECLARE_LINK_MODE_MASK(supported) = { 0, };
1141         struct phy_device *phy_dev = h->phy_dev;
1142         int ret;
1143
1144         if (!h->phy_dev)
1145                 return 0;
1146
1147         ethtool_convert_legacy_u32_to_link_mode(supported, h->if_support);
1148         linkmode_and(phy_dev->supported, phy_dev->supported, supported);
1149         linkmode_copy(phy_dev->advertising, phy_dev->supported);
1150
1151         if (h->phy_if == PHY_INTERFACE_MODE_XGMII)
1152                 phy_dev->autoneg = false;
1153
1154         if (h->phy_if != PHY_INTERFACE_MODE_XGMII) {
1155                 phy_dev->dev_flags = 0;
1156
1157                 ret = phy_connect_direct(ndev, phy_dev, hns_nic_adjust_link,
1158                                          h->phy_if);
1159         } else {
1160                 ret = phy_attach_direct(ndev, phy_dev, 0, h->phy_if);
1161         }
1162         if (unlikely(ret))
1163                 return -ENODEV;
1164
1165         return 0;
1166 }
1167
1168 static int hns_nic_ring_open(struct net_device *netdev, int idx)
1169 {
1170         struct hns_nic_priv *priv = netdev_priv(netdev);
1171         struct hnae_handle *h = priv->ae_handle;
1172
1173         napi_enable(&priv->ring_data[idx].napi);
1174
1175         enable_irq(priv->ring_data[idx].ring->irq);
1176         h->dev->ops->toggle_ring_irq(priv->ring_data[idx].ring, 0);
1177
1178         return 0;
1179 }
1180
1181 static int hns_nic_net_set_mac_address(struct net_device *ndev, void *p)
1182 {
1183         struct hns_nic_priv *priv = netdev_priv(ndev);
1184         struct hnae_handle *h = priv->ae_handle;
1185         struct sockaddr *mac_addr = p;
1186         int ret;
1187
1188         if (!mac_addr || !is_valid_ether_addr((const u8 *)mac_addr->sa_data))
1189                 return -EADDRNOTAVAIL;
1190
1191         ret = h->dev->ops->set_mac_addr(h, mac_addr->sa_data);
1192         if (ret) {
1193                 netdev_err(ndev, "set_mac_address fail, ret=%d!\n", ret);
1194                 return ret;
1195         }
1196
1197         memcpy(ndev->dev_addr, mac_addr->sa_data, ndev->addr_len);
1198
1199         return 0;
1200 }
1201
1202 static void hns_nic_update_stats(struct net_device *netdev)
1203 {
1204         struct hns_nic_priv *priv = netdev_priv(netdev);
1205         struct hnae_handle *h = priv->ae_handle;
1206
1207         h->dev->ops->update_stats(h, &netdev->stats);
1208 }
1209
1210 /* set mac addr if it is configed. or leave it to the AE driver */
1211 static void hns_init_mac_addr(struct net_device *ndev)
1212 {
1213         struct hns_nic_priv *priv = netdev_priv(ndev);
1214
1215         if (!device_get_mac_address(priv->dev, ndev->dev_addr, ETH_ALEN)) {
1216                 eth_hw_addr_random(ndev);
1217                 dev_warn(priv->dev, "No valid mac, use random mac %pM",
1218                          ndev->dev_addr);
1219         }
1220 }
1221
1222 static void hns_nic_ring_close(struct net_device *netdev, int idx)
1223 {
1224         struct hns_nic_priv *priv = netdev_priv(netdev);
1225         struct hnae_handle *h = priv->ae_handle;
1226
1227         h->dev->ops->toggle_ring_irq(priv->ring_data[idx].ring, 1);
1228         disable_irq(priv->ring_data[idx].ring->irq);
1229
1230         napi_disable(&priv->ring_data[idx].napi);
1231 }
1232
1233 static int hns_nic_init_affinity_mask(int q_num, int ring_idx,
1234                                       struct hnae_ring *ring, cpumask_t *mask)
1235 {
1236         int cpu;
1237
1238         /* Diffrent irq banlance between 16core and 32core.
1239          * The cpu mask set by ring index according to the ring flag
1240          * which indicate the ring is tx or rx.
1241          */
1242         if (q_num == num_possible_cpus()) {
1243                 if (is_tx_ring(ring))
1244                         cpu = ring_idx;
1245                 else
1246                         cpu = ring_idx - q_num;
1247         } else {
1248                 if (is_tx_ring(ring))
1249                         cpu = ring_idx * 2;
1250                 else
1251                         cpu = (ring_idx - q_num) * 2 + 1;
1252         }
1253
1254         cpumask_clear(mask);
1255         cpumask_set_cpu(cpu, mask);
1256
1257         return cpu;
1258 }
1259
1260 static void hns_nic_free_irq(int q_num, struct hns_nic_priv *priv)
1261 {
1262         int i;
1263
1264         for (i = 0; i < q_num * 2; i++) {
1265                 if (priv->ring_data[i].ring->irq_init_flag == RCB_IRQ_INITED) {
1266                         irq_set_affinity_hint(priv->ring_data[i].ring->irq,
1267                                               NULL);
1268                         free_irq(priv->ring_data[i].ring->irq,
1269                                  &priv->ring_data[i]);
1270                         priv->ring_data[i].ring->irq_init_flag =
1271                                 RCB_IRQ_NOT_INITED;
1272                 }
1273         }
1274 }
1275
1276 static int hns_nic_init_irq(struct hns_nic_priv *priv)
1277 {
1278         struct hnae_handle *h = priv->ae_handle;
1279         struct hns_nic_ring_data *rd;
1280         int i;
1281         int ret;
1282         int cpu;
1283
1284         for (i = 0; i < h->q_num * 2; i++) {
1285                 rd = &priv->ring_data[i];
1286
1287                 if (rd->ring->irq_init_flag == RCB_IRQ_INITED)
1288                         break;
1289
1290                 snprintf(rd->ring->ring_name, RCB_RING_NAME_LEN,
1291                          "%s-%s%d", priv->netdev->name,
1292                          (is_tx_ring(rd->ring) ? "tx" : "rx"), rd->queue_index);
1293
1294                 rd->ring->ring_name[RCB_RING_NAME_LEN - 1] = '\0';
1295
1296                 ret = request_irq(rd->ring->irq,
1297                                   hns_irq_handle, 0, rd->ring->ring_name, rd);
1298                 if (ret) {
1299                         netdev_err(priv->netdev, "request irq(%d) fail\n",
1300                                    rd->ring->irq);
1301                         goto out_free_irq;
1302                 }
1303                 disable_irq(rd->ring->irq);
1304
1305                 cpu = hns_nic_init_affinity_mask(h->q_num, i,
1306                                                  rd->ring, &rd->mask);
1307
1308                 if (cpu_online(cpu))
1309                         irq_set_affinity_hint(rd->ring->irq,
1310                                               &rd->mask);
1311
1312                 rd->ring->irq_init_flag = RCB_IRQ_INITED;
1313         }
1314
1315         return 0;
1316
1317 out_free_irq:
1318         hns_nic_free_irq(h->q_num, priv);
1319         return ret;
1320 }
1321
1322 static int hns_nic_net_up(struct net_device *ndev)
1323 {
1324         struct hns_nic_priv *priv = netdev_priv(ndev);
1325         struct hnae_handle *h = priv->ae_handle;
1326         int i, j;
1327         int ret;
1328
1329         if (!test_bit(NIC_STATE_DOWN, &priv->state))
1330                 return 0;
1331
1332         ret = hns_nic_init_irq(priv);
1333         if (ret != 0) {
1334                 netdev_err(ndev, "hns init irq failed! ret=%d\n", ret);
1335                 return ret;
1336         }
1337
1338         for (i = 0; i < h->q_num * 2; i++) {
1339                 ret = hns_nic_ring_open(ndev, i);
1340                 if (ret)
1341                         goto out_has_some_queues;
1342         }
1343
1344         ret = h->dev->ops->set_mac_addr(h, ndev->dev_addr);
1345         if (ret)
1346                 goto out_set_mac_addr_err;
1347
1348         ret = h->dev->ops->start ? h->dev->ops->start(h) : 0;
1349         if (ret)
1350                 goto out_start_err;
1351
1352         if (ndev->phydev)
1353                 phy_start(ndev->phydev);
1354
1355         clear_bit(NIC_STATE_DOWN, &priv->state);
1356         (void)mod_timer(&priv->service_timer, jiffies + SERVICE_TIMER_HZ);
1357
1358         return 0;
1359
1360 out_start_err:
1361         netif_stop_queue(ndev);
1362 out_set_mac_addr_err:
1363 out_has_some_queues:
1364         for (j = i - 1; j >= 0; j--)
1365                 hns_nic_ring_close(ndev, j);
1366
1367         hns_nic_free_irq(h->q_num, priv);
1368         set_bit(NIC_STATE_DOWN, &priv->state);
1369
1370         return ret;
1371 }
1372
1373 static void hns_nic_net_down(struct net_device *ndev)
1374 {
1375         int i;
1376         struct hnae_ae_ops *ops;
1377         struct hns_nic_priv *priv = netdev_priv(ndev);
1378
1379         if (test_and_set_bit(NIC_STATE_DOWN, &priv->state))
1380                 return;
1381
1382         (void)del_timer_sync(&priv->service_timer);
1383         netif_tx_stop_all_queues(ndev);
1384         netif_carrier_off(ndev);
1385         netif_tx_disable(ndev);
1386         priv->link = 0;
1387
1388         if (ndev->phydev)
1389                 phy_stop(ndev->phydev);
1390
1391         ops = priv->ae_handle->dev->ops;
1392
1393         if (ops->stop)
1394                 ops->stop(priv->ae_handle);
1395
1396         netif_tx_stop_all_queues(ndev);
1397
1398         for (i = priv->ae_handle->q_num - 1; i >= 0; i--) {
1399                 hns_nic_ring_close(ndev, i);
1400                 hns_nic_ring_close(ndev, i + priv->ae_handle->q_num);
1401
1402                 /* clean tx buffers*/
1403                 hns_nic_tx_clr_all_bufs(priv->ring_data + i);
1404         }
1405 }
1406
1407 void hns_nic_net_reset(struct net_device *ndev)
1408 {
1409         struct hns_nic_priv *priv = netdev_priv(ndev);
1410         struct hnae_handle *handle = priv->ae_handle;
1411
1412         while (test_and_set_bit(NIC_STATE_RESETTING, &priv->state))
1413                 usleep_range(1000, 2000);
1414
1415         (void)hnae_reinit_handle(handle);
1416
1417         clear_bit(NIC_STATE_RESETTING, &priv->state);
1418 }
1419
1420 void hns_nic_net_reinit(struct net_device *netdev)
1421 {
1422         struct hns_nic_priv *priv = netdev_priv(netdev);
1423         enum hnae_port_type type = priv->ae_handle->port_type;
1424
1425         netif_trans_update(priv->netdev);
1426         while (test_and_set_bit(NIC_STATE_REINITING, &priv->state))
1427                 usleep_range(1000, 2000);
1428
1429         hns_nic_net_down(netdev);
1430
1431         /* Only do hns_nic_net_reset in debug mode
1432          * because of hardware limitation.
1433          */
1434         if (type == HNAE_PORT_DEBUG)
1435                 hns_nic_net_reset(netdev);
1436
1437         (void)hns_nic_net_up(netdev);
1438         clear_bit(NIC_STATE_REINITING, &priv->state);
1439 }
1440
1441 static int hns_nic_net_open(struct net_device *ndev)
1442 {
1443         struct hns_nic_priv *priv = netdev_priv(ndev);
1444         struct hnae_handle *h = priv->ae_handle;
1445         int ret;
1446
1447         if (test_bit(NIC_STATE_TESTING, &priv->state))
1448                 return -EBUSY;
1449
1450         priv->link = 0;
1451         netif_carrier_off(ndev);
1452
1453         ret = netif_set_real_num_tx_queues(ndev, h->q_num);
1454         if (ret < 0) {
1455                 netdev_err(ndev, "netif_set_real_num_tx_queues fail, ret=%d!\n",
1456                            ret);
1457                 return ret;
1458         }
1459
1460         ret = netif_set_real_num_rx_queues(ndev, h->q_num);
1461         if (ret < 0) {
1462                 netdev_err(ndev,
1463                            "netif_set_real_num_rx_queues fail, ret=%d!\n", ret);
1464                 return ret;
1465         }
1466
1467         ret = hns_nic_net_up(ndev);
1468         if (ret) {
1469                 netdev_err(ndev,
1470                            "hns net up fail, ret=%d!\n", ret);
1471                 return ret;
1472         }
1473
1474         return 0;
1475 }
1476
1477 static int hns_nic_net_stop(struct net_device *ndev)
1478 {
1479         hns_nic_net_down(ndev);
1480
1481         return 0;
1482 }
1483
1484 static void hns_tx_timeout_reset(struct hns_nic_priv *priv);
1485 #define HNS_TX_TIMEO_LIMIT (40 * HZ)
1486 static void hns_nic_net_timeout(struct net_device *ndev)
1487 {
1488         struct hns_nic_priv *priv = netdev_priv(ndev);
1489
1490         if (ndev->watchdog_timeo < HNS_TX_TIMEO_LIMIT) {
1491                 ndev->watchdog_timeo *= 2;
1492                 netdev_info(ndev, "watchdog_timo changed to %d.\n",
1493                             ndev->watchdog_timeo);
1494         } else {
1495                 ndev->watchdog_timeo = HNS_NIC_TX_TIMEOUT;
1496                 hns_tx_timeout_reset(priv);
1497         }
1498 }
1499
1500 static int hns_nic_do_ioctl(struct net_device *netdev, struct ifreq *ifr,
1501                             int cmd)
1502 {
1503         struct phy_device *phy_dev = netdev->phydev;
1504
1505         if (!netif_running(netdev))
1506                 return -EINVAL;
1507
1508         if (!phy_dev)
1509                 return -ENOTSUPP;
1510
1511         return phy_mii_ioctl(phy_dev, ifr, cmd);
1512 }
1513
1514 static netdev_tx_t hns_nic_net_xmit(struct sk_buff *skb,
1515                                     struct net_device *ndev)
1516 {
1517         struct hns_nic_priv *priv = netdev_priv(ndev);
1518
1519         assert(skb->queue_mapping < ndev->ae_handle->q_num);
1520
1521         return hns_nic_net_xmit_hw(ndev, skb,
1522                                    &tx_ring_data(priv, skb->queue_mapping));
1523 }
1524
1525 static void hns_nic_drop_rx_fetch(struct hns_nic_ring_data *ring_data,
1526                                   struct sk_buff *skb)
1527 {
1528         dev_kfree_skb_any(skb);
1529 }
1530
1531 #define HNS_LB_TX_RING  0
1532 static struct sk_buff *hns_assemble_skb(struct net_device *ndev)
1533 {
1534         struct sk_buff *skb;
1535         struct ethhdr *ethhdr;
1536         int frame_len;
1537
1538         /* allocate test skb */
1539         skb = alloc_skb(64, GFP_KERNEL);
1540         if (!skb)
1541                 return NULL;
1542
1543         skb_put(skb, 64);
1544         skb->dev = ndev;
1545         memset(skb->data, 0xFF, skb->len);
1546
1547         /* must be tcp/ip package */
1548         ethhdr = (struct ethhdr *)skb->data;
1549         ethhdr->h_proto = htons(ETH_P_IP);
1550
1551         frame_len = skb->len & (~1ul);
1552         memset(&skb->data[frame_len / 2], 0xAA,
1553                frame_len / 2 - 1);
1554
1555         skb->queue_mapping = HNS_LB_TX_RING;
1556
1557         return skb;
1558 }
1559
1560 static int hns_enable_serdes_lb(struct net_device *ndev)
1561 {
1562         struct hns_nic_priv *priv = netdev_priv(ndev);
1563         struct hnae_handle *h = priv->ae_handle;
1564         struct hnae_ae_ops *ops = h->dev->ops;
1565         int speed, duplex;
1566         int ret;
1567
1568         ret = ops->set_loopback(h, MAC_INTERNALLOOP_SERDES, 1);
1569         if (ret)
1570                 return ret;
1571
1572         ret = ops->start ? ops->start(h) : 0;
1573         if (ret)
1574                 return ret;
1575
1576         /* link adjust duplex*/
1577         if (h->phy_if != PHY_INTERFACE_MODE_XGMII)
1578                 speed = 1000;
1579         else
1580                 speed = 10000;
1581         duplex = 1;
1582
1583         ops->adjust_link(h, speed, duplex);
1584
1585         /* wait h/w ready */
1586         mdelay(300);
1587
1588         return 0;
1589 }
1590
1591 static void hns_disable_serdes_lb(struct net_device *ndev)
1592 {
1593         struct hns_nic_priv *priv = netdev_priv(ndev);
1594         struct hnae_handle *h = priv->ae_handle;
1595         struct hnae_ae_ops *ops = h->dev->ops;
1596
1597         ops->stop(h);
1598         ops->set_loopback(h, MAC_INTERNALLOOP_SERDES, 0);
1599 }
1600
1601 /**
1602  *hns_nic_clear_all_rx_fetch - clear the chip fetched descriptions. The
1603  *function as follows:
1604  *    1. if one rx ring has found the page_offset is not equal 0 between head
1605  *       and tail, it means that the chip fetched the wrong descs for the ring
1606  *       which buffer size is 4096.
1607  *    2. we set the chip serdes loopback and set rss indirection to the ring.
1608  *    3. construct 64-bytes ip broadcast packages, wait the associated rx ring
1609  *       recieving all packages and it will fetch new descriptions.
1610  *    4. recover to the original state.
1611  *
1612  *@ndev: net device
1613  */
1614 static int hns_nic_clear_all_rx_fetch(struct net_device *ndev)
1615 {
1616         struct hns_nic_priv *priv = netdev_priv(ndev);
1617         struct hnae_handle *h = priv->ae_handle;
1618         struct hnae_ae_ops *ops = h->dev->ops;
1619         struct hns_nic_ring_data *rd;
1620         struct hnae_ring *ring;
1621         struct sk_buff *skb;
1622         u32 *org_indir;
1623         u32 *cur_indir;
1624         int indir_size;
1625         int head, tail;
1626         int fetch_num;
1627         int i, j;
1628         bool found;
1629         int retry_times;
1630         int ret = 0;
1631
1632         /* alloc indir memory */
1633         indir_size = ops->get_rss_indir_size(h) * sizeof(*org_indir);
1634         org_indir = kzalloc(indir_size, GFP_KERNEL);
1635         if (!org_indir)
1636                 return -ENOMEM;
1637
1638         /* store the orginal indirection */
1639         ops->get_rss(h, org_indir, NULL, NULL);
1640
1641         cur_indir = kzalloc(indir_size, GFP_KERNEL);
1642         if (!cur_indir) {
1643                 ret = -ENOMEM;
1644                 goto cur_indir_alloc_err;
1645         }
1646
1647         /* set loopback */
1648         if (hns_enable_serdes_lb(ndev)) {
1649                 ret = -EINVAL;
1650                 goto enable_serdes_lb_err;
1651         }
1652
1653         /* foreach every rx ring to clear fetch desc */
1654         for (i = 0; i < h->q_num; i++) {
1655                 ring = &h->qs[i]->rx_ring;
1656                 head = readl_relaxed(ring->io_base + RCB_REG_HEAD);
1657                 tail = readl_relaxed(ring->io_base + RCB_REG_TAIL);
1658                 found = false;
1659                 fetch_num = ring_dist(ring, head, tail);
1660
1661                 while (head != tail) {
1662                         if (ring->desc_cb[head].page_offset != 0) {
1663                                 found = true;
1664                                 break;
1665                         }
1666
1667                         head++;
1668                         if (head == ring->desc_num)
1669                                 head = 0;
1670                 }
1671
1672                 if (found) {
1673                         for (j = 0; j < indir_size / sizeof(*org_indir); j++)
1674                                 cur_indir[j] = i;
1675                         ops->set_rss(h, cur_indir, NULL, 0);
1676
1677                         for (j = 0; j < fetch_num; j++) {
1678                                 /* alloc one skb and init */
1679                                 skb = hns_assemble_skb(ndev);
1680                                 if (!skb)
1681                                         goto out;
1682                                 rd = &tx_ring_data(priv, skb->queue_mapping);
1683                                 hns_nic_net_xmit_hw(ndev, skb, rd);
1684
1685                                 retry_times = 0;
1686                                 while (retry_times++ < 10) {
1687                                         mdelay(10);
1688                                         /* clean rx */
1689                                         rd = &rx_ring_data(priv, i);
1690                                         if (rd->poll_one(rd, fetch_num,
1691                                                          hns_nic_drop_rx_fetch))
1692                                                 break;
1693                                 }
1694
1695                                 retry_times = 0;
1696                                 while (retry_times++ < 10) {
1697                                         mdelay(10);
1698                                         /* clean tx ring 0 send package */
1699                                         rd = &tx_ring_data(priv,
1700                                                            HNS_LB_TX_RING);
1701                                         if (rd->poll_one(rd, fetch_num, NULL))
1702                                                 break;
1703                                 }
1704                         }
1705                 }
1706         }
1707
1708 out:
1709         /* restore everything */
1710         ops->set_rss(h, org_indir, NULL, 0);
1711         hns_disable_serdes_lb(ndev);
1712 enable_serdes_lb_err:
1713         kfree(cur_indir);
1714 cur_indir_alloc_err:
1715         kfree(org_indir);
1716
1717         return ret;
1718 }
1719
1720 static int hns_nic_change_mtu(struct net_device *ndev, int new_mtu)
1721 {
1722         struct hns_nic_priv *priv = netdev_priv(ndev);
1723         struct hnae_handle *h = priv->ae_handle;
1724         bool if_running = netif_running(ndev);
1725         int ret;
1726
1727         /* MTU < 68 is an error and causes problems on some kernels */
1728         if (new_mtu < 68)
1729                 return -EINVAL;
1730
1731         /* MTU no change */
1732         if (new_mtu == ndev->mtu)
1733                 return 0;
1734
1735         if (!h->dev->ops->set_mtu)
1736                 return -ENOTSUPP;
1737
1738         if (if_running) {
1739                 (void)hns_nic_net_stop(ndev);
1740                 msleep(100);
1741         }
1742
1743         if (priv->enet_ver != AE_VERSION_1 &&
1744             ndev->mtu <= BD_SIZE_2048_MAX_MTU &&
1745             new_mtu > BD_SIZE_2048_MAX_MTU) {
1746                 /* update desc */
1747                 hnae_reinit_all_ring_desc(h);
1748
1749                 /* clear the package which the chip has fetched */
1750                 ret = hns_nic_clear_all_rx_fetch(ndev);
1751
1752                 /* the page offset must be consist with desc */
1753                 hnae_reinit_all_ring_page_off(h);
1754
1755                 if (ret) {
1756                         netdev_err(ndev, "clear the fetched desc fail\n");
1757                         goto out;
1758                 }
1759         }
1760
1761         ret = h->dev->ops->set_mtu(h, new_mtu);
1762         if (ret) {
1763                 netdev_err(ndev, "set mtu fail, return value %d\n",
1764                            ret);
1765                 goto out;
1766         }
1767
1768         /* finally, set new mtu to netdevice */
1769         ndev->mtu = new_mtu;
1770
1771 out:
1772         if (if_running) {
1773                 if (hns_nic_net_open(ndev)) {
1774                         netdev_err(ndev, "hns net open fail\n");
1775                         ret = -EINVAL;
1776                 }
1777         }
1778
1779         return ret;
1780 }
1781
1782 static int hns_nic_set_features(struct net_device *netdev,
1783                                 netdev_features_t features)
1784 {
1785         struct hns_nic_priv *priv = netdev_priv(netdev);
1786
1787         switch (priv->enet_ver) {
1788         case AE_VERSION_1:
1789                 if (features & (NETIF_F_TSO | NETIF_F_TSO6))
1790                         netdev_info(netdev, "enet v1 do not support tso!\n");
1791                 break;
1792         default:
1793                 if (features & (NETIF_F_TSO | NETIF_F_TSO6)) {
1794                         priv->ops.fill_desc = fill_tso_desc;
1795                         priv->ops.maybe_stop_tx = hns_nic_maybe_stop_tso;
1796                         /* The chip only support 7*4096 */
1797                         netif_set_gso_max_size(netdev, 7 * 4096);
1798                 } else {
1799                         priv->ops.fill_desc = fill_v2_desc;
1800                         priv->ops.maybe_stop_tx = hns_nic_maybe_stop_tx;
1801                 }
1802                 break;
1803         }
1804         netdev->features = features;
1805         return 0;
1806 }
1807
1808 static netdev_features_t hns_nic_fix_features(
1809                 struct net_device *netdev, netdev_features_t features)
1810 {
1811         struct hns_nic_priv *priv = netdev_priv(netdev);
1812
1813         switch (priv->enet_ver) {
1814         case AE_VERSION_1:
1815                 features &= ~(NETIF_F_TSO | NETIF_F_TSO6 |
1816                                 NETIF_F_HW_VLAN_CTAG_FILTER);
1817                 break;
1818         default:
1819                 break;
1820         }
1821         return features;
1822 }
1823
1824 static int hns_nic_uc_sync(struct net_device *netdev, const unsigned char *addr)
1825 {
1826         struct hns_nic_priv *priv = netdev_priv(netdev);
1827         struct hnae_handle *h = priv->ae_handle;
1828
1829         if (h->dev->ops->add_uc_addr)
1830                 return h->dev->ops->add_uc_addr(h, addr);
1831
1832         return 0;
1833 }
1834
1835 static int hns_nic_uc_unsync(struct net_device *netdev,
1836                              const unsigned char *addr)
1837 {
1838         struct hns_nic_priv *priv = netdev_priv(netdev);
1839         struct hnae_handle *h = priv->ae_handle;
1840
1841         if (h->dev->ops->rm_uc_addr)
1842                 return h->dev->ops->rm_uc_addr(h, addr);
1843
1844         return 0;
1845 }
1846
1847 /**
1848  * nic_set_multicast_list - set mutl mac address
1849  * @netdev: net device
1850  * @p: mac address
1851  *
1852  * return void
1853  */
1854 static void hns_set_multicast_list(struct net_device *ndev)
1855 {
1856         struct hns_nic_priv *priv = netdev_priv(ndev);
1857         struct hnae_handle *h = priv->ae_handle;
1858         struct netdev_hw_addr *ha = NULL;
1859
1860         if (!h) {
1861                 netdev_err(ndev, "hnae handle is null\n");
1862                 return;
1863         }
1864
1865         if (h->dev->ops->clr_mc_addr)
1866                 if (h->dev->ops->clr_mc_addr(h))
1867                         netdev_err(ndev, "clear multicast address fail\n");
1868
1869         if (h->dev->ops->set_mc_addr) {
1870                 netdev_for_each_mc_addr(ha, ndev)
1871                         if (h->dev->ops->set_mc_addr(h, ha->addr))
1872                                 netdev_err(ndev, "set multicast fail\n");
1873         }
1874 }
1875
1876 static void hns_nic_set_rx_mode(struct net_device *ndev)
1877 {
1878         struct hns_nic_priv *priv = netdev_priv(ndev);
1879         struct hnae_handle *h = priv->ae_handle;
1880
1881         if (h->dev->ops->set_promisc_mode) {
1882                 if (ndev->flags & IFF_PROMISC)
1883                         h->dev->ops->set_promisc_mode(h, 1);
1884                 else
1885                         h->dev->ops->set_promisc_mode(h, 0);
1886         }
1887
1888         hns_set_multicast_list(ndev);
1889
1890         if (__dev_uc_sync(ndev, hns_nic_uc_sync, hns_nic_uc_unsync))
1891                 netdev_err(ndev, "sync uc address fail\n");
1892 }
1893
1894 static void hns_nic_get_stats64(struct net_device *ndev,
1895                                 struct rtnl_link_stats64 *stats)
1896 {
1897         int idx = 0;
1898         u64 tx_bytes = 0;
1899         u64 rx_bytes = 0;
1900         u64 tx_pkts = 0;
1901         u64 rx_pkts = 0;
1902         struct hns_nic_priv *priv = netdev_priv(ndev);
1903         struct hnae_handle *h = priv->ae_handle;
1904
1905         for (idx = 0; idx < h->q_num; idx++) {
1906                 tx_bytes += h->qs[idx]->tx_ring.stats.tx_bytes;
1907                 tx_pkts += h->qs[idx]->tx_ring.stats.tx_pkts;
1908                 rx_bytes += h->qs[idx]->rx_ring.stats.rx_bytes;
1909                 rx_pkts += h->qs[idx]->rx_ring.stats.rx_pkts;
1910         }
1911
1912         stats->tx_bytes = tx_bytes;
1913         stats->tx_packets = tx_pkts;
1914         stats->rx_bytes = rx_bytes;
1915         stats->rx_packets = rx_pkts;
1916
1917         stats->rx_errors = ndev->stats.rx_errors;
1918         stats->multicast = ndev->stats.multicast;
1919         stats->rx_length_errors = ndev->stats.rx_length_errors;
1920         stats->rx_crc_errors = ndev->stats.rx_crc_errors;
1921         stats->rx_missed_errors = ndev->stats.rx_missed_errors;
1922
1923         stats->tx_errors = ndev->stats.tx_errors;
1924         stats->rx_dropped = ndev->stats.rx_dropped;
1925         stats->tx_dropped = ndev->stats.tx_dropped;
1926         stats->collisions = ndev->stats.collisions;
1927         stats->rx_over_errors = ndev->stats.rx_over_errors;
1928         stats->rx_frame_errors = ndev->stats.rx_frame_errors;
1929         stats->rx_fifo_errors = ndev->stats.rx_fifo_errors;
1930         stats->tx_aborted_errors = ndev->stats.tx_aborted_errors;
1931         stats->tx_carrier_errors = ndev->stats.tx_carrier_errors;
1932         stats->tx_fifo_errors = ndev->stats.tx_fifo_errors;
1933         stats->tx_heartbeat_errors = ndev->stats.tx_heartbeat_errors;
1934         stats->tx_window_errors = ndev->stats.tx_window_errors;
1935         stats->rx_compressed = ndev->stats.rx_compressed;
1936         stats->tx_compressed = ndev->stats.tx_compressed;
1937 }
1938
1939 static u16
1940 hns_nic_select_queue(struct net_device *ndev, struct sk_buff *skb,
1941                      struct net_device *sb_dev)
1942 {
1943         struct ethhdr *eth_hdr = (struct ethhdr *)skb->data;
1944         struct hns_nic_priv *priv = netdev_priv(ndev);
1945
1946         /* fix hardware broadcast/multicast packets queue loopback */
1947         if (!AE_IS_VER1(priv->enet_ver) &&
1948             is_multicast_ether_addr(eth_hdr->h_dest))
1949                 return 0;
1950         else
1951                 return netdev_pick_tx(ndev, skb, NULL);
1952 }
1953
1954 static const struct net_device_ops hns_nic_netdev_ops = {
1955         .ndo_open = hns_nic_net_open,
1956         .ndo_stop = hns_nic_net_stop,
1957         .ndo_start_xmit = hns_nic_net_xmit,
1958         .ndo_tx_timeout = hns_nic_net_timeout,
1959         .ndo_set_mac_address = hns_nic_net_set_mac_address,
1960         .ndo_change_mtu = hns_nic_change_mtu,
1961         .ndo_do_ioctl = hns_nic_do_ioctl,
1962         .ndo_set_features = hns_nic_set_features,
1963         .ndo_fix_features = hns_nic_fix_features,
1964         .ndo_get_stats64 = hns_nic_get_stats64,
1965         .ndo_set_rx_mode = hns_nic_set_rx_mode,
1966         .ndo_select_queue = hns_nic_select_queue,
1967 };
1968
1969 static void hns_nic_update_link_status(struct net_device *netdev)
1970 {
1971         struct hns_nic_priv *priv = netdev_priv(netdev);
1972
1973         struct hnae_handle *h = priv->ae_handle;
1974
1975         if (h->phy_dev) {
1976                 if (h->phy_if != PHY_INTERFACE_MODE_XGMII)
1977                         return;
1978
1979                 (void)genphy_read_status(h->phy_dev);
1980         }
1981         hns_nic_adjust_link(netdev);
1982 }
1983
1984 /* for dumping key regs*/
1985 static void hns_nic_dump(struct hns_nic_priv *priv)
1986 {
1987         struct hnae_handle *h = priv->ae_handle;
1988         struct hnae_ae_ops *ops = h->dev->ops;
1989         u32 *data, reg_num, i;
1990
1991         if (ops->get_regs_len && ops->get_regs) {
1992                 reg_num = ops->get_regs_len(priv->ae_handle);
1993                 reg_num = (reg_num + 3ul) & ~3ul;
1994                 data = kcalloc(reg_num, sizeof(u32), GFP_KERNEL);
1995                 if (data) {
1996                         ops->get_regs(priv->ae_handle, data);
1997                         for (i = 0; i < reg_num; i += 4)
1998                                 pr_info("0x%08x: 0x%08x 0x%08x 0x%08x 0x%08x\n",
1999                                         i, data[i], data[i + 1],
2000                                         data[i + 2], data[i + 3]);
2001                         kfree(data);
2002                 }
2003         }
2004
2005         for (i = 0; i < h->q_num; i++) {
2006                 pr_info("tx_queue%d_next_to_clean:%d\n",
2007                         i, h->qs[i]->tx_ring.next_to_clean);
2008                 pr_info("tx_queue%d_next_to_use:%d\n",
2009                         i, h->qs[i]->tx_ring.next_to_use);
2010                 pr_info("rx_queue%d_next_to_clean:%d\n",
2011                         i, h->qs[i]->rx_ring.next_to_clean);
2012                 pr_info("rx_queue%d_next_to_use:%d\n",
2013                         i, h->qs[i]->rx_ring.next_to_use);
2014         }
2015 }
2016
2017 /* for resetting subtask */
2018 static void hns_nic_reset_subtask(struct hns_nic_priv *priv)
2019 {
2020         enum hnae_port_type type = priv->ae_handle->port_type;
2021
2022         if (!test_bit(NIC_STATE2_RESET_REQUESTED, &priv->state))
2023                 return;
2024         clear_bit(NIC_STATE2_RESET_REQUESTED, &priv->state);
2025
2026         /* If we're already down, removing or resetting, just bail */
2027         if (test_bit(NIC_STATE_DOWN, &priv->state) ||
2028             test_bit(NIC_STATE_REMOVING, &priv->state) ||
2029             test_bit(NIC_STATE_RESETTING, &priv->state))
2030                 return;
2031
2032         hns_nic_dump(priv);
2033         netdev_info(priv->netdev, "try to reset %s port!\n",
2034                     (type == HNAE_PORT_DEBUG ? "debug" : "service"));
2035
2036         rtnl_lock();
2037         /* put off any impending NetWatchDogTimeout */
2038         netif_trans_update(priv->netdev);
2039         hns_nic_net_reinit(priv->netdev);
2040
2041         rtnl_unlock();
2042 }
2043
2044 /* for doing service complete*/
2045 static void hns_nic_service_event_complete(struct hns_nic_priv *priv)
2046 {
2047         WARN_ON(!test_bit(NIC_STATE_SERVICE_SCHED, &priv->state));
2048         /* make sure to commit the things */
2049         smp_mb__before_atomic();
2050         clear_bit(NIC_STATE_SERVICE_SCHED, &priv->state);
2051 }
2052
2053 static void hns_nic_service_task(struct work_struct *work)
2054 {
2055         struct hns_nic_priv *priv
2056                 = container_of(work, struct hns_nic_priv, service_task);
2057         struct hnae_handle *h = priv->ae_handle;
2058
2059         hns_nic_reset_subtask(priv);
2060         hns_nic_update_link_status(priv->netdev);
2061         h->dev->ops->update_led_status(h);
2062         hns_nic_update_stats(priv->netdev);
2063
2064         hns_nic_service_event_complete(priv);
2065 }
2066
2067 static void hns_nic_task_schedule(struct hns_nic_priv *priv)
2068 {
2069         if (!test_bit(NIC_STATE_DOWN, &priv->state) &&
2070             !test_bit(NIC_STATE_REMOVING, &priv->state) &&
2071             !test_and_set_bit(NIC_STATE_SERVICE_SCHED, &priv->state))
2072                 (void)schedule_work(&priv->service_task);
2073 }
2074
2075 static void hns_nic_service_timer(struct timer_list *t)
2076 {
2077         struct hns_nic_priv *priv = from_timer(priv, t, service_timer);
2078
2079         (void)mod_timer(&priv->service_timer, jiffies + SERVICE_TIMER_HZ);
2080
2081         hns_nic_task_schedule(priv);
2082 }
2083
2084 /**
2085  * hns_tx_timeout_reset - initiate reset due to Tx timeout
2086  * @priv: driver private struct
2087  **/
2088 static void hns_tx_timeout_reset(struct hns_nic_priv *priv)
2089 {
2090         /* Do the reset outside of interrupt context */
2091         if (!test_bit(NIC_STATE_DOWN, &priv->state)) {
2092                 set_bit(NIC_STATE2_RESET_REQUESTED, &priv->state);
2093                 netdev_warn(priv->netdev,
2094                             "initiating reset due to tx timeout(%llu,0x%lx)\n",
2095                             priv->tx_timeout_count, priv->state);
2096                 priv->tx_timeout_count++;
2097                 hns_nic_task_schedule(priv);
2098         }
2099 }
2100
2101 static int hns_nic_init_ring_data(struct hns_nic_priv *priv)
2102 {
2103         struct hnae_handle *h = priv->ae_handle;
2104         struct hns_nic_ring_data *rd;
2105         bool is_ver1 = AE_IS_VER1(priv->enet_ver);
2106         int i;
2107
2108         if (h->q_num > NIC_MAX_Q_PER_VF) {
2109                 netdev_err(priv->netdev, "too much queue (%d)\n", h->q_num);
2110                 return -EINVAL;
2111         }
2112
2113         priv->ring_data = kzalloc(array3_size(h->q_num,
2114                                               sizeof(*priv->ring_data), 2),
2115                                   GFP_KERNEL);
2116         if (!priv->ring_data)
2117                 return -ENOMEM;
2118
2119         for (i = 0; i < h->q_num; i++) {
2120                 rd = &priv->ring_data[i];
2121                 rd->queue_index = i;
2122                 rd->ring = &h->qs[i]->tx_ring;
2123                 rd->poll_one = hns_nic_tx_poll_one;
2124                 rd->fini_process = is_ver1 ? hns_nic_tx_fini_pro :
2125                         hns_nic_tx_fini_pro_v2;
2126
2127                 netif_napi_add(priv->netdev, &rd->napi,
2128                                hns_nic_common_poll, NAPI_POLL_WEIGHT);
2129                 rd->ring->irq_init_flag = RCB_IRQ_NOT_INITED;
2130         }
2131         for (i = h->q_num; i < h->q_num * 2; i++) {
2132                 rd = &priv->ring_data[i];
2133                 rd->queue_index = i - h->q_num;
2134                 rd->ring = &h->qs[i - h->q_num]->rx_ring;
2135                 rd->poll_one = hns_nic_rx_poll_one;
2136                 rd->ex_process = hns_nic_rx_up_pro;
2137                 rd->fini_process = is_ver1 ? hns_nic_rx_fini_pro :
2138                         hns_nic_rx_fini_pro_v2;
2139
2140                 netif_napi_add(priv->netdev, &rd->napi,
2141                                hns_nic_common_poll, NAPI_POLL_WEIGHT);
2142                 rd->ring->irq_init_flag = RCB_IRQ_NOT_INITED;
2143         }
2144
2145         return 0;
2146 }
2147
2148 static void hns_nic_uninit_ring_data(struct hns_nic_priv *priv)
2149 {
2150         struct hnae_handle *h = priv->ae_handle;
2151         int i;
2152
2153         for (i = 0; i < h->q_num * 2; i++) {
2154                 netif_napi_del(&priv->ring_data[i].napi);
2155                 if (priv->ring_data[i].ring->irq_init_flag == RCB_IRQ_INITED) {
2156                         (void)irq_set_affinity_hint(
2157                                 priv->ring_data[i].ring->irq,
2158                                 NULL);
2159                         free_irq(priv->ring_data[i].ring->irq,
2160                                  &priv->ring_data[i]);
2161                 }
2162
2163                 priv->ring_data[i].ring->irq_init_flag = RCB_IRQ_NOT_INITED;
2164         }
2165         kfree(priv->ring_data);
2166 }
2167
2168 static void hns_nic_set_priv_ops(struct net_device *netdev)
2169 {
2170         struct hns_nic_priv *priv = netdev_priv(netdev);
2171         struct hnae_handle *h = priv->ae_handle;
2172
2173         if (AE_IS_VER1(priv->enet_ver)) {
2174                 priv->ops.fill_desc = fill_desc;
2175                 priv->ops.get_rxd_bnum = get_rx_desc_bnum;
2176                 priv->ops.maybe_stop_tx = hns_nic_maybe_stop_tx;
2177         } else {
2178                 priv->ops.get_rxd_bnum = get_v2rx_desc_bnum;
2179                 if ((netdev->features & NETIF_F_TSO) ||
2180                     (netdev->features & NETIF_F_TSO6)) {
2181                         priv->ops.fill_desc = fill_tso_desc;
2182                         priv->ops.maybe_stop_tx = hns_nic_maybe_stop_tso;
2183                         /* This chip only support 7*4096 */
2184                         netif_set_gso_max_size(netdev, 7 * 4096);
2185                 } else {
2186                         priv->ops.fill_desc = fill_v2_desc;
2187                         priv->ops.maybe_stop_tx = hns_nic_maybe_stop_tx;
2188                 }
2189                 /* enable tso when init
2190                  * control tso on/off through TSE bit in bd
2191                  */
2192                 h->dev->ops->set_tso_stats(h, 1);
2193         }
2194 }
2195
2196 static int hns_nic_try_get_ae(struct net_device *ndev)
2197 {
2198         struct hns_nic_priv *priv = netdev_priv(ndev);
2199         struct hnae_handle *h;
2200         int ret;
2201
2202         h = hnae_get_handle(&priv->netdev->dev,
2203                             priv->fwnode, priv->port_id, NULL);
2204         if (IS_ERR_OR_NULL(h)) {
2205                 ret = -ENODEV;
2206                 dev_dbg(priv->dev, "has not handle, register notifier!\n");
2207                 goto out;
2208         }
2209         priv->ae_handle = h;
2210
2211         ret = hns_nic_init_phy(ndev, h);
2212         if (ret) {
2213                 dev_err(priv->dev, "probe phy device fail!\n");
2214                 goto out_init_phy;
2215         }
2216
2217         ret = hns_nic_init_ring_data(priv);
2218         if (ret) {
2219                 ret = -ENOMEM;
2220                 goto out_init_ring_data;
2221         }
2222
2223         hns_nic_set_priv_ops(ndev);
2224
2225         ret = register_netdev(ndev);
2226         if (ret) {
2227                 dev_err(priv->dev, "probe register netdev fail!\n");
2228                 goto out_reg_ndev_fail;
2229         }
2230         return 0;
2231
2232 out_reg_ndev_fail:
2233         hns_nic_uninit_ring_data(priv);
2234         priv->ring_data = NULL;
2235 out_init_phy:
2236 out_init_ring_data:
2237         hnae_put_handle(priv->ae_handle);
2238         priv->ae_handle = NULL;
2239 out:
2240         return ret;
2241 }
2242
2243 static int hns_nic_notifier_action(struct notifier_block *nb,
2244                                    unsigned long action, void *data)
2245 {
2246         struct hns_nic_priv *priv =
2247                 container_of(nb, struct hns_nic_priv, notifier_block);
2248
2249         assert(action == HNAE_AE_REGISTER);
2250
2251         if (!hns_nic_try_get_ae(priv->netdev)) {
2252                 hnae_unregister_notifier(&priv->notifier_block);
2253                 priv->notifier_block.notifier_call = NULL;
2254         }
2255         return 0;
2256 }
2257
2258 static int hns_nic_dev_probe(struct platform_device *pdev)
2259 {
2260         struct device *dev = &pdev->dev;
2261         struct net_device *ndev;
2262         struct hns_nic_priv *priv;
2263         u32 port_id;
2264         int ret;
2265
2266         ndev = alloc_etherdev_mq(sizeof(struct hns_nic_priv), NIC_MAX_Q_PER_VF);
2267         if (!ndev)
2268                 return -ENOMEM;
2269
2270         platform_set_drvdata(pdev, ndev);
2271
2272         priv = netdev_priv(ndev);
2273         priv->dev = dev;
2274         priv->netdev = ndev;
2275
2276         if (dev_of_node(dev)) {
2277                 struct device_node *ae_node;
2278
2279                 if (of_device_is_compatible(dev->of_node,
2280                                             "hisilicon,hns-nic-v1"))
2281                         priv->enet_ver = AE_VERSION_1;
2282                 else
2283                         priv->enet_ver = AE_VERSION_2;
2284
2285                 ae_node = of_parse_phandle(dev->of_node, "ae-handle", 0);
2286                 if (!ae_node) {
2287                         ret = -ENODEV;
2288                         dev_err(dev, "not find ae-handle\n");
2289                         goto out_read_prop_fail;
2290                 }
2291                 priv->fwnode = &ae_node->fwnode;
2292         } else if (is_acpi_node(dev->fwnode)) {
2293                 struct fwnode_reference_args args;
2294
2295                 if (acpi_dev_found(hns_enet_acpi_match[0].id))
2296                         priv->enet_ver = AE_VERSION_1;
2297                 else if (acpi_dev_found(hns_enet_acpi_match[1].id))
2298                         priv->enet_ver = AE_VERSION_2;
2299                 else
2300                         return -ENXIO;
2301
2302                 /* try to find port-idx-in-ae first */
2303                 ret = acpi_node_get_property_reference(dev->fwnode,
2304                                                        "ae-handle", 0, &args);
2305                 if (ret) {
2306                         dev_err(dev, "not find ae-handle\n");
2307                         goto out_read_prop_fail;
2308                 }
2309                 if (!is_acpi_device_node(args.fwnode)) {
2310                         ret = -EINVAL;
2311                         goto out_read_prop_fail;
2312                 }
2313                 priv->fwnode = args.fwnode;
2314         } else {
2315                 dev_err(dev, "cannot read cfg data from OF or acpi\n");
2316                 return -ENXIO;
2317         }
2318
2319         ret = device_property_read_u32(dev, "port-idx-in-ae", &port_id);
2320         if (ret) {
2321                 /* only for old code compatible */
2322                 ret = device_property_read_u32(dev, "port-id", &port_id);
2323                 if (ret)
2324                         goto out_read_prop_fail;
2325                 /* for old dts, we need to caculate the port offset */
2326                 port_id = port_id < HNS_SRV_OFFSET ? port_id + HNS_DEBUG_OFFSET
2327                         : port_id - HNS_SRV_OFFSET;
2328         }
2329         priv->port_id = port_id;
2330
2331         hns_init_mac_addr(ndev);
2332
2333         ndev->watchdog_timeo = HNS_NIC_TX_TIMEOUT;
2334         ndev->priv_flags |= IFF_UNICAST_FLT;
2335         ndev->netdev_ops = &hns_nic_netdev_ops;
2336         hns_ethtool_set_ops(ndev);
2337
2338         ndev->features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
2339                 NETIF_F_RXCSUM | NETIF_F_SG | NETIF_F_GSO |
2340                 NETIF_F_GRO;
2341         ndev->vlan_features |=
2342                 NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM | NETIF_F_RXCSUM;
2343         ndev->vlan_features |= NETIF_F_SG | NETIF_F_GSO | NETIF_F_GRO;
2344
2345         /* MTU range: 68 - 9578 (v1) or 9706 (v2) */
2346         ndev->min_mtu = MAC_MIN_MTU;
2347         switch (priv->enet_ver) {
2348         case AE_VERSION_2:
2349                 ndev->features |= NETIF_F_TSO | NETIF_F_TSO6 | NETIF_F_NTUPLE;
2350                 ndev->hw_features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
2351                         NETIF_F_RXCSUM | NETIF_F_SG | NETIF_F_GSO |
2352                         NETIF_F_GRO | NETIF_F_TSO | NETIF_F_TSO6;
2353                 ndev->vlan_features |= NETIF_F_TSO | NETIF_F_TSO6;
2354                 ndev->max_mtu = MAC_MAX_MTU_V2 -
2355                                 (ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN);
2356                 break;
2357         default:
2358                 ndev->max_mtu = MAC_MAX_MTU -
2359                                 (ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN);
2360                 break;
2361         }
2362
2363         SET_NETDEV_DEV(ndev, dev);
2364
2365         if (!dma_set_mask_and_coherent(dev, DMA_BIT_MASK(64)))
2366                 dev_dbg(dev, "set mask to 64bit\n");
2367         else
2368                 dev_err(dev, "set mask to 64bit fail!\n");
2369
2370         /* carrier off reporting is important to ethtool even BEFORE open */
2371         netif_carrier_off(ndev);
2372
2373         timer_setup(&priv->service_timer, hns_nic_service_timer, 0);
2374         INIT_WORK(&priv->service_task, hns_nic_service_task);
2375
2376         set_bit(NIC_STATE_SERVICE_INITED, &priv->state);
2377         clear_bit(NIC_STATE_SERVICE_SCHED, &priv->state);
2378         set_bit(NIC_STATE_DOWN, &priv->state);
2379
2380         if (hns_nic_try_get_ae(priv->netdev)) {
2381                 priv->notifier_block.notifier_call = hns_nic_notifier_action;
2382                 ret = hnae_register_notifier(&priv->notifier_block);
2383                 if (ret) {
2384                         dev_err(dev, "register notifier fail!\n");
2385                         goto out_notify_fail;
2386                 }
2387                 dev_dbg(dev, "has not handle, register notifier!\n");
2388         }
2389
2390         return 0;
2391
2392 out_notify_fail:
2393         (void)cancel_work_sync(&priv->service_task);
2394 out_read_prop_fail:
2395         /* safe for ACPI FW */
2396         of_node_put(to_of_node(priv->fwnode));
2397         free_netdev(ndev);
2398         return ret;
2399 }
2400
2401 static int hns_nic_dev_remove(struct platform_device *pdev)
2402 {
2403         struct net_device *ndev = platform_get_drvdata(pdev);
2404         struct hns_nic_priv *priv = netdev_priv(ndev);
2405
2406         if (ndev->reg_state != NETREG_UNINITIALIZED)
2407                 unregister_netdev(ndev);
2408
2409         if (priv->ring_data)
2410                 hns_nic_uninit_ring_data(priv);
2411         priv->ring_data = NULL;
2412
2413         if (ndev->phydev)
2414                 phy_disconnect(ndev->phydev);
2415
2416         if (!IS_ERR_OR_NULL(priv->ae_handle))
2417                 hnae_put_handle(priv->ae_handle);
2418         priv->ae_handle = NULL;
2419         if (priv->notifier_block.notifier_call)
2420                 hnae_unregister_notifier(&priv->notifier_block);
2421         priv->notifier_block.notifier_call = NULL;
2422
2423         set_bit(NIC_STATE_REMOVING, &priv->state);
2424         (void)cancel_work_sync(&priv->service_task);
2425
2426         /* safe for ACPI FW */
2427         of_node_put(to_of_node(priv->fwnode));
2428
2429         free_netdev(ndev);
2430         return 0;
2431 }
2432
2433 static const struct of_device_id hns_enet_of_match[] = {
2434         {.compatible = "hisilicon,hns-nic-v1",},
2435         {.compatible = "hisilicon,hns-nic-v2",},
2436         {},
2437 };
2438
2439 MODULE_DEVICE_TABLE(of, hns_enet_of_match);
2440
2441 static struct platform_driver hns_nic_dev_driver = {
2442         .driver = {
2443                 .name = "hns-nic",
2444                 .of_match_table = hns_enet_of_match,
2445                 .acpi_match_table = ACPI_PTR(hns_enet_acpi_match),
2446         },
2447         .probe = hns_nic_dev_probe,
2448         .remove = hns_nic_dev_remove,
2449 };
2450
2451 module_platform_driver(hns_nic_dev_driver);
2452
2453 MODULE_DESCRIPTION("HISILICON HNS Ethernet driver");
2454 MODULE_AUTHOR("Hisilicon, Inc.");
2455 MODULE_LICENSE("GPL");
2456 MODULE_ALIAS("platform:hns-nic");