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

   1 /*
   2  * Copyright (c) 2014-2015 Hisilicon Limited.
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; either version 2 of the License, or
   7  * (at your option) any later version.
   8  */
   9
  10 #include <linux/clk.h>
  11 #include <linux/cpumask.h>
  12 #include <linux/etherdevice.h>
  13 #include <linux/if_vlan.h>
  14 #include <linux/interrupt.h>
  15 #include <linux/io.h>
  16 #include <linux/ip.h>
  17 #include <linux/ipv6.h>
  18 #include <linux/module.h>
  19 #include <linux/phy.h>
  20 #include <linux/platform_device.h>
  21 #include <linux/skbuff.h>
  22
  23 #include "hnae.h"
  24 #include "hns_enet.h"
  25 #include "hns_dsaf_mac.h"
  26
  27 #define NIC_MAX_Q_PER_VF 16
  28 #define HNS_NIC_TX_TIMEOUT (5 * HZ)
  29
  30 #define SERVICE_TIMER_HZ (1 * HZ)
  31
  32 #define NIC_TX_CLEAN_MAX_NUM 256
  33 #define NIC_RX_CLEAN_MAX_NUM 64
  34
  35 #define RCB_IRQ_NOT_INITED 0
  36 #define RCB_IRQ_INITED 1
  37 #define HNS_BUFFER_SIZE_2048 2048
  38
  39 #define BD_MAX_SEND_SIZE 8191
  40 #define SKB_TMP_LEN(SKB) \
  41         (((SKB)->transport_header - (SKB)->mac_header) + tcp_hdrlen(SKB))
  42
  43 static void fill_v2_desc_hw(struct hnae_ring *ring, void *priv, int size,
  44                             int send_sz, dma_addr_t dma, int frag_end,
  45                             int buf_num, enum hns_desc_type type, int mtu)
  46 {
  47         struct hnae_desc *desc = &ring->desc[ring->next_to_use];
  48         struct hnae_desc_cb *desc_cb = &ring->desc_cb[ring->next_to_use];
  49         struct iphdr *iphdr;
  50         struct ipv6hdr *ipv6hdr;
  51         struct sk_buff *skb;
  52         __be16 protocol;
  53         u8 bn_pid = 0;
  54         u8 rrcfv = 0;
  55         u8 ip_offset = 0;
  56         u8 tvsvsn = 0;
  57         u16 mss = 0;
  58         u8 l4_len = 0;
  59         u16 paylen = 0;
  60
  61         desc_cb->priv = priv;
  62         desc_cb->length = size;
  63         desc_cb->dma = dma;
  64         desc_cb->type = type;
  65
  66         desc->addr = cpu_to_le64(dma);
  67         desc->tx.send_size = cpu_to_le16((u16)send_sz);
  68
  69         /* config bd buffer end */
  70         hnae_set_bit(rrcfv, HNSV2_TXD_VLD_B, 1);
  71         hnae_set_field(bn_pid, HNSV2_TXD_BUFNUM_M, 0, buf_num - 1);
  72
  73         /* fill port_id in the tx bd for sending management pkts */
  74         hnae_set_field(bn_pid, HNSV2_TXD_PORTID_M,
  75                        HNSV2_TXD_PORTID_S, ring->q->handle->dport_id);
  76
  77         if (type == DESC_TYPE_SKB) {
  78                 skb = (struct sk_buff *)priv;
  79
  80                 if (skb->ip_summed == CHECKSUM_PARTIAL) {
  81                         skb_reset_mac_len(skb);
  82                         protocol = skb->protocol;
  83                         ip_offset = ETH_HLEN;
  84
  85                         if (protocol == htons(ETH_P_8021Q)) {
  86                                 ip_offset += VLAN_HLEN;
  87                                 protocol = vlan_get_protocol(skb);
  88                                 skb->protocol = protocol;
  89                         }
  90
  91                         if (skb->protocol == htons(ETH_P_IP)) {
  92                                 iphdr = ip_hdr(skb);
  93                                 hnae_set_bit(rrcfv, HNSV2_TXD_L3CS_B, 1);
  94                                 hnae_set_bit(rrcfv, HNSV2_TXD_L4CS_B, 1);
  95
  96                                 /* check for tcp/udp header */
  97                                 if (iphdr->protocol == IPPROTO_TCP &&
  98                                     skb_is_gso(skb)) {
  99                                         hnae_set_bit(tvsvsn,
 100                                                      HNSV2_TXD_TSE_B, 1);
 101                                         l4_len = tcp_hdrlen(skb);
 102                                         mss = skb_shinfo(skb)->gso_size;
 103                                         paylen = skb->len - SKB_TMP_LEN(skb);
 104                                 }
 105                         } else if (skb->protocol == htons(ETH_P_IPV6)) {
 106                                 hnae_set_bit(tvsvsn, HNSV2_TXD_IPV6_B, 1);
 107                                 ipv6hdr = ipv6_hdr(skb);
 108                                 hnae_set_bit(rrcfv, HNSV2_TXD_L4CS_B, 1);
 109
 110                                 /* check for tcp/udp header */
 111                                 if (ipv6hdr->nexthdr == IPPROTO_TCP &&
 112                                     skb_is_gso(skb) && skb_is_gso_v6(skb)) {
 113                                         hnae_set_bit(tvsvsn,
 114                                                      HNSV2_TXD_TSE_B, 1);
 115                                         l4_len = tcp_hdrlen(skb);
 116                                         mss = skb_shinfo(skb)->gso_size;
 117                                         paylen = skb->len - SKB_TMP_LEN(skb);
 118                                 }
 119                         }
 120                         desc->tx.ip_offset = ip_offset;
 121                         desc->tx.tse_vlan_snap_v6_sctp_nth = tvsvsn;
 122                         desc->tx.mss = cpu_to_le16(mss);
 123                         desc->tx.l4_len = l4_len;
 124                         desc->tx.paylen = cpu_to_le16(paylen);
 125                 }
 126         }
 127
 128         hnae_set_bit(rrcfv, HNSV2_TXD_FE_B, frag_end);
 129
 130         desc->tx.bn_pid = bn_pid;
 131         desc->tx.ra_ri_cs_fe_vld = rrcfv;
 132
 133         ring_ptr_move_fw(ring, next_to_use);
 134 }
 135
 136 static void fill_v2_desc(struct hnae_ring *ring, void *priv,
 137                          int size, dma_addr_t dma, int frag_end,
 138                          int buf_num, enum hns_desc_type type, int mtu)
 139 {
 140         fill_v2_desc_hw(ring, priv, size, size, dma, frag_end,
 141                         buf_num, type, mtu);
 142 }
 143
 144 static const struct acpi_device_id hns_enet_acpi_match[] = {
 145         { "HISI00C1", 0 },
 146         { "HISI00C2", 0 },
 147         { },
 148 };
 149 MODULE_DEVICE_TABLE(acpi, hns_enet_acpi_match);
 150
 151 static void fill_desc(struct hnae_ring *ring, void *priv,
 152                       int size, dma_addr_t dma, int frag_end,
 153                       int buf_num, enum hns_desc_type type, int mtu)
 154 {
 155         struct hnae_desc *desc = &ring->desc[ring->next_to_use];
 156         struct hnae_desc_cb *desc_cb = &ring->desc_cb[ring->next_to_use];
 157         struct sk_buff *skb;
 158         __be16 protocol;
 159         u32 ip_offset;
 160         u32 asid_bufnum_pid = 0;
 161         u32 flag_ipoffset = 0;
 162
 163         desc_cb->priv = priv;
 164         desc_cb->length = size;
 165         desc_cb->dma = dma;
 166         desc_cb->type = type;
 167
 168         desc->addr = cpu_to_le64(dma);
 169         desc->tx.send_size = cpu_to_le16((u16)size);
 170
 171         /*config bd buffer end */
 172         flag_ipoffset |= 1 << HNS_TXD_VLD_B;
 173
 174         asid_bufnum_pid |= buf_num << HNS_TXD_BUFNUM_S;
 175
 176         if (type == DESC_TYPE_SKB) {
 177                 skb = (struct sk_buff *)priv;
 178
 179                 if (skb->ip_summed == CHECKSUM_PARTIAL) {
 180                         protocol = skb->protocol;
 181                         ip_offset = ETH_HLEN;
 182
 183                         /*if it is a SW VLAN check the next protocol*/
 184                         if (protocol == htons(ETH_P_8021Q)) {
 185                                 ip_offset += VLAN_HLEN;
 186                                 protocol = vlan_get_protocol(skb);
 187                                 skb->protocol = protocol;
 188                         }
 189
 190                         if (skb->protocol == htons(ETH_P_IP)) {
 191                                 flag_ipoffset |= 1 << HNS_TXD_L3CS_B;
 192                                 /* check for tcp/udp header */
 193                                 flag_ipoffset |= 1 << HNS_TXD_L4CS_B;
 194
 195                         } else if (skb->protocol == htons(ETH_P_IPV6)) {
 196                                 /* ipv6 has not l3 cs, check for L4 header */
 197                                 flag_ipoffset |= 1 << HNS_TXD_L4CS_B;
 198                         }
 199
 200                         flag_ipoffset |= ip_offset << HNS_TXD_IPOFFSET_S;
 201                 }
 202         }
 203
 204         flag_ipoffset |= frag_end << HNS_TXD_FE_B;
 205
 206         desc->tx.asid_bufnum_pid = cpu_to_le16(asid_bufnum_pid);
 207         desc->tx.flag_ipoffset = cpu_to_le32(flag_ipoffset);
 208
 209         ring_ptr_move_fw(ring, next_to_use);
 210 }
 211
 212 static void unfill_desc(struct hnae_ring *ring)
 213 {
 214         ring_ptr_move_bw(ring, next_to_use);
 215 }
 216
 217 static int hns_nic_maybe_stop_tx(
 218         struct sk_buff **out_skb, int *bnum, struct hnae_ring *ring)
 219 {
 220         struct sk_buff *skb = *out_skb;
 221         struct sk_buff *new_skb = NULL;
 222         int buf_num;
 223
 224         /* no. of segments (plus a header) */
 225         buf_num = skb_shinfo(skb)->nr_frags + 1;
 226
 227         if (unlikely(buf_num > ring->max_desc_num_per_pkt)) {
 228                 if (ring_space(ring) < 1)
 229                         return -EBUSY;
 230
 231                 new_skb = skb_copy(skb, GFP_ATOMIC);
 232                 if (!new_skb)
 233                         return -ENOMEM;
 234
 235                 dev_kfree_skb_any(skb);
 236                 *out_skb = new_skb;
 237                 buf_num = 1;
 238         } else if (buf_num > ring_space(ring)) {
 239                 return -EBUSY;
 240         }
 241
 242         *bnum = buf_num;
 243         return 0;
 244 }
 245
 246 static int hns_nic_maybe_stop_tso(
 247         struct sk_buff **out_skb, int *bnum, struct hnae_ring *ring)
 248 {
 249         int i;
 250         int size;
 251         int buf_num;
 252         int frag_num;
 253         struct sk_buff *skb = *out_skb;
 254         struct sk_buff *new_skb = NULL;
 255         struct skb_frag_struct *frag;
 256
 257         size = skb_headlen(skb);
 258         buf_num = (size + BD_MAX_SEND_SIZE - 1) / BD_MAX_SEND_SIZE;
 259
 260         frag_num = skb_shinfo(skb)->nr_frags;
 261         for (i = 0; i < frag_num; i++) {
 262                 frag = &skb_shinfo(skb)->frags[i];
 263                 size = skb_frag_size(frag);
 264                 buf_num += (size + BD_MAX_SEND_SIZE - 1) / BD_MAX_SEND_SIZE;
 265         }
 266
 267         if (unlikely(buf_num > ring->max_desc_num_per_pkt)) {
 268                 buf_num = (skb->len + BD_MAX_SEND_SIZE - 1) / BD_MAX_SEND_SIZE;
 269                 if (ring_space(ring) < buf_num)
 270                         return -EBUSY;
 271                 /* manual split the send packet */
 272                 new_skb = skb_copy(skb, GFP_ATOMIC);
 273                 if (!new_skb)
 274                         return -ENOMEM;
 275                 dev_kfree_skb_any(skb);
 276                 *out_skb = new_skb;
 277
 278         } else if (ring_space(ring) < buf_num) {
 279                 return -EBUSY;
 280         }
 281
 282         *bnum = buf_num;
 283         return 0;
 284 }
 285
 286 static void fill_tso_desc(struct hnae_ring *ring, void *priv,
 287                           int size, dma_addr_t dma, int frag_end,
 288                           int buf_num, enum hns_desc_type type, int mtu)
 289 {
 290         int frag_buf_num;
 291         int sizeoflast;
 292         int k;
 293
 294         frag_buf_num = (size + BD_MAX_SEND_SIZE - 1) / BD_MAX_SEND_SIZE;
 295         sizeoflast = size % BD_MAX_SEND_SIZE;
 296         sizeoflast = sizeoflast ? sizeoflast : BD_MAX_SEND_SIZE;
 297
 298         /* when the frag size is bigger than hardware, split this frag */
 299         for (k = 0; k < frag_buf_num; k++)
 300                 fill_v2_desc_hw(ring, priv, k == 0 ? size : 0,
 301                                 (k == frag_buf_num - 1) ?
 302                                         sizeoflast : BD_MAX_SEND_SIZE,
 303                                 dma + BD_MAX_SEND_SIZE * k,
 304                                 frag_end && (k == frag_buf_num - 1) ? 1 : 0,
 305                                 buf_num,
 306                                 (type == DESC_TYPE_SKB && !k) ?
 307                                         DESC_TYPE_SKB : DESC_TYPE_PAGE,
 308                                 mtu);
 309 }
 310
 311 netdev_tx_t hns_nic_net_xmit_hw(struct net_device *ndev,
 312                                 struct sk_buff *skb,
 313                                 struct hns_nic_ring_data *ring_data)
 314 {
 315         struct hns_nic_priv *priv = netdev_priv(ndev);
 316         struct hnae_ring *ring = ring_data->ring;
 317         struct device *dev = ring_to_dev(ring);
 318         struct netdev_queue *dev_queue;
 319         struct skb_frag_struct *frag;
 320         int buf_num;
 321         int seg_num;
 322         dma_addr_t dma;
 323         int size, next_to_use;
 324         int i;
 325
 326         switch (priv->ops.maybe_stop_tx(&skb, &buf_num, ring)) {
 327         case -EBUSY:
 328                 ring->stats.tx_busy++;
 329                 goto out_net_tx_busy;
 330         case -ENOMEM:
 331                 ring->stats.sw_err_cnt++;
 332                 netdev_err(ndev, "no memory to xmit!\n");
 333                 goto out_err_tx_ok;
 334         default:
 335                 break;
 336         }
 337
 338         /* no. of segments (plus a header) */
 339         seg_num = skb_shinfo(skb)->nr_frags + 1;
 340         next_to_use = ring->next_to_use;
 341
 342         /* fill the first part */
 343         size = skb_headlen(skb);
 344         dma = dma_map_single(dev, skb->data, size, DMA_TO_DEVICE);
 345         if (dma_mapping_error(dev, dma)) {
 346                 netdev_err(ndev, "TX head DMA map failed\n");
 347                 ring->stats.sw_err_cnt++;
 348                 goto out_err_tx_ok;
 349         }
 350         priv->ops.fill_desc(ring, skb, size, dma, seg_num == 1 ? 1 : 0,
 351                             buf_num, DESC_TYPE_SKB, ndev->mtu);
 352
 353         /* fill the fragments */
 354         for (i = 1; i < seg_num; i++) {
 355                 frag = &skb_shinfo(skb)->frags[i - 1];
 356                 size = skb_frag_size(frag);
 357                 dma = skb_frag_dma_map(dev, frag, 0, size, DMA_TO_DEVICE);
 358                 if (dma_mapping_error(dev, dma)) {
 359                         netdev_err(ndev, "TX frag(%d) DMA map failed\n", i);
 360                         ring->stats.sw_err_cnt++;
 361                         goto out_map_frag_fail;
 362                 }
 363                 priv->ops.fill_desc(ring, skb_frag_page(frag), size, dma,
 364                                     seg_num - 1 == i ? 1 : 0, buf_num,
 365                                     DESC_TYPE_PAGE, ndev->mtu);
 366         }
 367
 368         /*complete translate all packets*/
 369         dev_queue = netdev_get_tx_queue(ndev, skb->queue_mapping);
 370         netdev_tx_sent_queue(dev_queue, skb->len);
 371
 372         netif_trans_update(ndev);
 373         ndev->stats.tx_bytes += skb->len;
 374         ndev->stats.tx_packets++;
 375
 376         wmb(); /* commit all data before submit */
 377         assert(skb->queue_mapping < priv->ae_handle->q_num);
 378         hnae_queue_xmit(priv->ae_handle->qs[skb->queue_mapping], buf_num);
 379         ring->stats.tx_pkts++;
 380         ring->stats.tx_bytes += skb->len;
 381
 382         return NETDEV_TX_OK;
 383
 384 out_map_frag_fail:
 385
 386         while (ring->next_to_use != next_to_use) {
 387                 unfill_desc(ring);
 388                 if (ring->next_to_use != next_to_use)
 389                         dma_unmap_page(dev,
 390                                        ring->desc_cb[ring->next_to_use].dma,
 391                                        ring->desc_cb[ring->next_to_use].length,
 392                                        DMA_TO_DEVICE);
 393                 else
 394                         dma_unmap_single(dev,
 395                                          ring->desc_cb[next_to_use].dma,
 396                                          ring->desc_cb[next_to_use].length,
 397                                          DMA_TO_DEVICE);
 398         }
 399
 400 out_err_tx_ok:
 401
 402         dev_kfree_skb_any(skb);
 403         return NETDEV_TX_OK;
 404
 405 out_net_tx_busy:
 406
 407         netif_stop_subqueue(ndev, skb->queue_mapping);
 408
 409         /* Herbert's original patch had:
 410          *  smp_mb__after_netif_stop_queue();
 411          * but since that doesn't exist yet, just open code it.
 412          */
 413         smp_mb();
 414         return NETDEV_TX_BUSY;
 415 }
 416
 417 static void hns_nic_reuse_page(struct sk_buff *skb, int i,
 418                                struct hnae_ring *ring, int pull_len,
 419                                struct hnae_desc_cb *desc_cb)
 420 {
 421         struct hnae_desc *desc;
 422         u32 truesize;
 423         int size;
 424         int last_offset;
 425         bool twobufs;
 426
 427         twobufs = ((PAGE_SIZE < 8192) &&
 428                 hnae_buf_size(ring) == HNS_BUFFER_SIZE_2048);
 429
 430         desc = &ring->desc[ring->next_to_clean];
 431         size = le16_to_cpu(desc->rx.size);
 432
 433         if (twobufs) {
 434                 truesize = hnae_buf_size(ring);
 435         } else {
 436                 truesize = ALIGN(size, L1_CACHE_BYTES);
 437                 last_offset = hnae_page_size(ring) - hnae_buf_size(ring);
 438         }
 439
 440         skb_add_rx_frag(skb, i, desc_cb->priv, desc_cb->page_offset + pull_len,
 441                         size - pull_len, truesize);
 442
 443          /* avoid re-using remote pages,flag default unreuse */
 444         if (unlikely(page_to_nid(desc_cb->priv) != numa_node_id()))
 445                 return;
 446
 447         if (twobufs) {
 448                 /* if we are only owner of page we can reuse it */
 449                 if (likely(page_count(desc_cb->priv) == 1)) {
 450                         /* flip page offset to other buffer */
 451                         desc_cb->page_offset ^= truesize;
 452
 453                         desc_cb->reuse_flag = 1;
 454                         /* bump ref count on page before it is given*/
 455                         get_page(desc_cb->priv);
 456                 }
 457                 return;
 458         }
 459
 460         /* move offset up to the next cache line */
 461         desc_cb->page_offset += truesize;
 462
 463         if (desc_cb->page_offset <= last_offset) {
 464                 desc_cb->reuse_flag = 1;
 465                 /* bump ref count on page before it is given*/
 466                 get_page(desc_cb->priv);
 467         }
 468 }
 469
 470 static void get_v2rx_desc_bnum(u32 bnum_flag, int *out_bnum)
 471 {
 472         *out_bnum = hnae_get_field(bnum_flag,
 473                                    HNS_RXD_BUFNUM_M, HNS_RXD_BUFNUM_S) + 1;
 474 }
 475
 476 static void get_rx_desc_bnum(u32 bnum_flag, int *out_bnum)
 477 {
 478         *out_bnum = hnae_get_field(bnum_flag,
 479                                    HNS_RXD_BUFNUM_M, HNS_RXD_BUFNUM_S);
 480 }
 481
 482 static void hns_nic_rx_checksum(struct hns_nic_ring_data *ring_data,
 483                                 struct sk_buff *skb, u32 flag)
 484 {
 485         struct net_device *netdev = ring_data->napi.dev;
 486         u32 l3id;
 487         u32 l4id;
 488
 489         /* check if RX checksum offload is enabled */
 490         if (unlikely(!(netdev->features & NETIF_F_RXCSUM)))
 491                 return;
 492
 493         /* In hardware, we only support checksum for the following protocols:
 494          * 1) IPv4,
 495          * 2) TCP(over IPv4 or IPv6),
 496          * 3) UDP(over IPv4 or IPv6),
 497          * 4) SCTP(over IPv4 or IPv6)
 498          * but we support many L3(IPv4, IPv6, MPLS, PPPoE etc) and L4(TCP,
 499          * UDP, GRE, SCTP, IGMP, ICMP etc.) protocols.
 500          *
 501          * Hardware limitation:
 502          * Our present hardware RX Descriptor lacks L3/L4 checksum "Status &
 503          * Error" bit (which usually can be used to indicate whether checksum
 504          * was calculated by the hardware and if there was any error encountered
 505          * during checksum calculation).
 506          *
 507          * Software workaround:
 508          * We do get info within the RX descriptor about the kind of L3/L4
 509          * protocol coming in the packet and the error status. These errors
 510          * might not just be checksum errors but could be related to version,
 511          * length of IPv4, UDP, TCP etc.
 512          * Because there is no-way of knowing if it is a L3/L4 error due to bad
 513          * checksum or any other L3/L4 error, we will not (cannot) convey
 514          * checksum status for such cases to upper stack and will not maintain
 515          * the RX L3/L4 checksum counters as well.
 516          */
 517
 518         l3id = hnae_get_field(flag, HNS_RXD_L3ID_M, HNS_RXD_L3ID_S);
 519         l4id = hnae_get_field(flag, HNS_RXD_L4ID_M, HNS_RXD_L4ID_S);
 520
 521         /*  check L3 protocol for which checksum is supported */
 522         if ((l3id != HNS_RX_FLAG_L3ID_IPV4) && (l3id != HNS_RX_FLAG_L3ID_IPV6))
 523                 return;
 524
 525         /* check for any(not just checksum)flagged L3 protocol errors */
 526         if (unlikely(hnae_get_bit(flag, HNS_RXD_L3E_B)))
 527                 return;
 528
 529         /* we do not support checksum of fragmented packets */
 530         if (unlikely(hnae_get_bit(flag, HNS_RXD_FRAG_B)))
 531                 return;
 532
 533         /*  check L4 protocol for which checksum is supported */
 534         if ((l4id != HNS_RX_FLAG_L4ID_TCP) &&
 535             (l4id != HNS_RX_FLAG_L4ID_UDP) &&
 536             (l4id != HNS_RX_FLAG_L4ID_SCTP))
 537                 return;
 538
 539         /* check for any(not just checksum)flagged L4 protocol errors */
 540         if (unlikely(hnae_get_bit(flag, HNS_RXD_L4E_B)))
 541                 return;
 542
 543         /* now, this has to be a packet with valid RX checksum */
 544         skb->ip_summed = CHECKSUM_UNNECESSARY;
 545 }
 546
 547 static int hns_nic_poll_rx_skb(struct hns_nic_ring_data *ring_data,
 548                                struct sk_buff **out_skb, int *out_bnum)
 549 {
 550         struct hnae_ring *ring = ring_data->ring;
 551         struct net_device *ndev = ring_data->napi.dev;
 552         struct hns_nic_priv *priv = netdev_priv(ndev);
 553         struct sk_buff *skb;
 554         struct hnae_desc *desc;
 555         struct hnae_desc_cb *desc_cb;
 556         unsigned char *va;
 557         int bnum, length, i;
 558         int pull_len;
 559         u32 bnum_flag;
 560
 561         desc = &ring->desc[ring->next_to_clean];
 562         desc_cb = &ring->desc_cb[ring->next_to_clean];
 563
 564         prefetch(desc);
 565
 566         va = (unsigned char *)desc_cb->buf + desc_cb->page_offset;
 567
 568         /* prefetch first cache line of first page */
 569         prefetch(va);
 570 #if L1_CACHE_BYTES < 128
 571         prefetch(va + L1_CACHE_BYTES);
 572 #endif
 573
 574         skb = *out_skb = napi_alloc_skb(&ring_data->napi,
 575                                         HNS_RX_HEAD_SIZE);
 576         if (unlikely(!skb)) {
 577                 netdev_err(ndev, "alloc rx skb fail\n");
 578                 ring->stats.sw_err_cnt++;
 579                 return -ENOMEM;
 580         }
 581
 582         prefetchw(skb->data);
 583         length = le16_to_cpu(desc->rx.pkt_len);
 584         bnum_flag = le32_to_cpu(desc->rx.ipoff_bnum_pid_flag);
 585         priv->ops.get_rxd_bnum(bnum_flag, &bnum);
 586         *out_bnum = bnum;
 587
 588         if (length <= HNS_RX_HEAD_SIZE) {
 589                 memcpy(__skb_put(skb, length), va, ALIGN(length, sizeof(long)));
 590
 591                 /* we can reuse buffer as-is, just make sure it is local */
 592                 if (likely(page_to_nid(desc_cb->priv) == numa_node_id()))
 593                         desc_cb->reuse_flag = 1;
 594                 else /* this page cannot be reused so discard it */
 595                         put_page(desc_cb->priv);
 596
 597                 ring_ptr_move_fw(ring, next_to_clean);
 598
 599                 if (unlikely(bnum != 1)) { /* check err*/
 600                         *out_bnum = 1;
 601                         goto out_bnum_err;
 602                 }
 603         } else {
 604                 ring->stats.seg_pkt_cnt++;
 605
 606                 pull_len = eth_get_headlen(va, HNS_RX_HEAD_SIZE);
 607                 memcpy(__skb_put(skb, pull_len), va,
 608                        ALIGN(pull_len, sizeof(long)));
 609
 610                 hns_nic_reuse_page(skb, 0, ring, pull_len, desc_cb);
 611                 ring_ptr_move_fw(ring, next_to_clean);
 612
 613                 if (unlikely(bnum >= (int)MAX_SKB_FRAGS)) { /* check err*/
 614                         *out_bnum = 1;
 615                         goto out_bnum_err;
 616                 }
 617                 for (i = 1; i < bnum; i++) {
 618                         desc = &ring->desc[ring->next_to_clean];
 619                         desc_cb = &ring->desc_cb[ring->next_to_clean];
 620
 621                         hns_nic_reuse_page(skb, i, ring, 0, desc_cb);
 622                         ring_ptr_move_fw(ring, next_to_clean);
 623                 }
 624         }
 625
 626         /* check except process, free skb and jump the desc */
 627         if (unlikely((!bnum) || (bnum > ring->max_desc_num_per_pkt))) {
 628 out_bnum_err:
 629                 *out_bnum = *out_bnum ? *out_bnum : 1; /* ntc moved,cannot 0*/
 630                 netdev_err(ndev, "invalid bnum(%d,%d,%d,%d),%016llx,%016llx\n",
 631                            bnum, ring->max_desc_num_per_pkt,
 632                            length, (int)MAX_SKB_FRAGS,
 633                            ((u64 *)desc)[0], ((u64 *)desc)[1]);
 634                 ring->stats.err_bd_num++;
 635                 dev_kfree_skb_any(skb);
 636                 return -EDOM;
 637         }
 638
 639         bnum_flag = le32_to_cpu(desc->rx.ipoff_bnum_pid_flag);
 640
 641         if (unlikely(!hnae_get_bit(bnum_flag, HNS_RXD_VLD_B))) {
 642                 netdev_err(ndev, "no valid bd,%016llx,%016llx\n",
 643                            ((u64 *)desc)[0], ((u64 *)desc)[1]);
 644                 ring->stats.non_vld_descs++;
 645                 dev_kfree_skb_any(skb);
 646                 return -EINVAL;
 647         }
 648
 649         if (unlikely((!desc->rx.pkt_len) ||
 650                      hnae_get_bit(bnum_flag, HNS_RXD_DROP_B))) {
 651                 ring->stats.err_pkt_len++;
 652                 dev_kfree_skb_any(skb);
 653                 return -EFAULT;
 654         }
 655
 656         if (unlikely(hnae_get_bit(bnum_flag, HNS_RXD_L2E_B))) {
 657                 ring->stats.l2_err++;
 658                 dev_kfree_skb_any(skb);
 659                 return -EFAULT;
 660         }
 661
 662         ring->stats.rx_pkts++;
 663         ring->stats.rx_bytes += skb->len;
 664
 665         /* indicate to upper stack if our hardware has already calculated
 666          * the RX checksum
 667          */
 668         hns_nic_rx_checksum(ring_data, skb, bnum_flag);
 669
 670         return 0;
 671 }
 672
 673 static void
 674 hns_nic_alloc_rx_buffers(struct hns_nic_ring_data *ring_data, int cleand_count)
 675 {
 676         int i, ret;
 677         struct hnae_desc_cb res_cbs;
 678         struct hnae_desc_cb *desc_cb;
 679         struct hnae_ring *ring = ring_data->ring;
 680         struct net_device *ndev = ring_data->napi.dev;
 681
 682         for (i = 0; i < cleand_count; i++) {
 683                 desc_cb = &ring->desc_cb[ring->next_to_use];
 684                 if (desc_cb->reuse_flag) {
 685                         ring->stats.reuse_pg_cnt++;
 686                         hnae_reuse_buffer(ring, ring->next_to_use);
 687                 } else {
 688                         ret = hnae_reserve_buffer_map(ring, &res_cbs);
 689                         if (ret) {
 690                                 ring->stats.sw_err_cnt++;
 691                                 netdev_err(ndev, "hnae reserve buffer map failed.\n");
 692                                 break;
 693                         }
 694                         hnae_replace_buffer(ring, ring->next_to_use, &res_cbs);
 695                 }
 696
 697                 ring_ptr_move_fw(ring, next_to_use);
 698         }
 699
 700         wmb(); /* make all data has been write before submit */
 701         writel_relaxed(i, ring->io_base + RCB_REG_HEAD);
 702 }
 703
 704 /* return error number for error or number of desc left to take
 705  */
 706 static void hns_nic_rx_up_pro(struct hns_nic_ring_data *ring_data,
 707                               struct sk_buff *skb)
 708 {
 709         struct net_device *ndev = ring_data->napi.dev;
 710
 711         skb->protocol = eth_type_trans(skb, ndev);
 712         (void)napi_gro_receive(&ring_data->napi, skb);
 713 }
 714
 715 static int hns_desc_unused(struct hnae_ring *ring)
 716 {
 717         int ntc = ring->next_to_clean;
 718         int ntu = ring->next_to_use;
 719
 720         return ((ntc >= ntu) ? 0 : ring->desc_num) + ntc - ntu;
 721 }
 722
 723 #define HNS_LOWEST_LATENCY_RATE         27      /* 27 MB/s */
 724 #define HNS_LOW_LATENCY_RATE                    80      /* 80 MB/s */
 725
 726 #define HNS_COAL_BDNUM                  3
 727
 728 static u32 hns_coal_rx_bdnum(struct hnae_ring *ring)
 729 {
 730         bool coal_enable = ring->q->handle->coal_adapt_en;
 731
 732         if (coal_enable &&
 733             ring->coal_last_rx_bytes > HNS_LOWEST_LATENCY_RATE)
 734                 return HNS_COAL_BDNUM;
 735         else
 736                 return 0;
 737 }
 738
 739 static void hns_update_rx_rate(struct hnae_ring *ring)
 740 {
 741         bool coal_enable = ring->q->handle->coal_adapt_en;
 742         u32 time_passed_ms;
 743         u64 total_bytes;
 744
 745         if (!coal_enable ||
 746             time_before(jiffies, ring->coal_last_jiffies + (HZ >> 4)))
 747                 return;
 748
 749         /* ring->stats.rx_bytes overflowed */
 750         if (ring->coal_last_rx_bytes > ring->stats.rx_bytes) {
 751                 ring->coal_last_rx_bytes = ring->stats.rx_bytes;
 752                 ring->coal_last_jiffies = jiffies;
 753                 return;
 754         }
 755
 756         total_bytes = ring->stats.rx_bytes - ring->coal_last_rx_bytes;
 757         time_passed_ms = jiffies_to_msecs(jiffies - ring->coal_last_jiffies);
 758         do_div(total_bytes, time_passed_ms);
 759         ring->coal_rx_rate = total_bytes >> 10;
 760
 761         ring->coal_last_rx_bytes = ring->stats.rx_bytes;
 762         ring->coal_last_jiffies = jiffies;
 763 }
 764
 765 /**
 766  * smooth_alg - smoothing algrithm for adjusting coalesce parameter
 767  **/
 768 static u32 smooth_alg(u32 new_param, u32 old_param)
 769 {
 770         u32 gap = (new_param > old_param) ? new_param - old_param
 771                                           : old_param - new_param;
 772
 773         if (gap > 8)
 774                 gap >>= 3;
 775
 776         if (new_param > old_param)
 777                 return old_param + gap;
 778         else
 779                 return old_param - gap;
 780 }
 781
 782 /**
 783  * hns_nic_adp_coalesce - self adapte coalesce according to rx rate
 784  * @ring_data: pointer to hns_nic_ring_data
 785  **/
 786 static void hns_nic_adpt_coalesce(struct hns_nic_ring_data *ring_data)
 787 {
 788         struct hnae_ring *ring = ring_data->ring;
 789         struct hnae_handle *handle = ring->q->handle;
 790         u32 new_coal_param, old_coal_param = ring->coal_param;
 791
 792         if (ring->coal_rx_rate < HNS_LOWEST_LATENCY_RATE)
 793                 new_coal_param = HNAE_LOWEST_LATENCY_COAL_PARAM;
 794         else if (ring->coal_rx_rate < HNS_LOW_LATENCY_RATE)
 795                 new_coal_param = HNAE_LOW_LATENCY_COAL_PARAM;
 796         else
 797                 new_coal_param = HNAE_BULK_LATENCY_COAL_PARAM;
 798
 799         if (new_coal_param == old_coal_param &&
 800             new_coal_param == handle->coal_param)
 801                 return;
 802
 803         new_coal_param = smooth_alg(new_coal_param, old_coal_param);
 804         ring->coal_param = new_coal_param;
 805
 806         /**
 807          * Because all ring in one port has one coalesce param, when one ring
 808          * calculate its own coalesce param, it cannot write to hardware at
 809          * once. There are three conditions as follows:
 810          *       1. current ring's coalesce param is larger than the hardware.
 811          *       2. or ring which adapt last time can change again.
 812          *       3. timeout.
 813          */
 814         if (new_coal_param == handle->coal_param) {
 815                 handle->coal_last_jiffies = jiffies;
 816                 handle->coal_ring_idx = ring_data->queue_index;
 817         } else if (new_coal_param > handle->coal_param ||
 818                    handle->coal_ring_idx == ring_data->queue_index ||
 819                    time_after(jiffies, handle->coal_last_jiffies + (HZ >> 4))) {
 820                 handle->dev->ops->set_coalesce_usecs(handle,
 821                                         new_coal_param);
 822                 handle->dev->ops->set_coalesce_frames(handle,
 823                                         1, new_coal_param);
 824                 handle->coal_param = new_coal_param;
 825                 handle->coal_ring_idx = ring_data->queue_index;
 826                 handle->coal_last_jiffies = jiffies;
 827         }
 828 }
 829
 830 static int hns_nic_rx_poll_one(struct hns_nic_ring_data *ring_data,
 831                                int budget, void *v)
 832 {
 833         struct hnae_ring *ring = ring_data->ring;
 834         struct sk_buff *skb;
 835         int num, bnum;
 836 #define RCB_NOF_ALLOC_RX_BUFF_ONCE 16
 837         int recv_pkts, recv_bds, clean_count, err;
 838         int unused_count = hns_desc_unused(ring);
 839
 840         num = readl_relaxed(ring->io_base + RCB_REG_FBDNUM);
 841         rmb(); /* make sure num taken effect before the other data is touched */
 842
 843         recv_pkts = 0, recv_bds = 0, clean_count = 0;
 844         num -= unused_count;
 845
 846         while (recv_pkts < budget && recv_bds < num) {
 847                 /* reuse or realloc buffers */
 848                 if (clean_count + unused_count >= RCB_NOF_ALLOC_RX_BUFF_ONCE) {
 849                         hns_nic_alloc_rx_buffers(ring_data,
 850                                                  clean_count + unused_count);
 851                         clean_count = 0;
 852                         unused_count = hns_desc_unused(ring);
 853                 }
 854
 855                 /* poll one pkt */
 856                 err = hns_nic_poll_rx_skb(ring_data, &skb, &bnum);
 857                 if (unlikely(!skb)) /* this fault cannot be repaired */
 858                         goto out;
 859
 860                 recv_bds += bnum;
 861                 clean_count += bnum;
 862                 if (unlikely(err)) {  /* do jump the err */
 863                         recv_pkts++;
 864                         continue;
 865                 }
 866
 867                 /* do update ip stack process*/
 868                 ((void (*)(struct hns_nic_ring_data *, struct sk_buff *))v)(
 869                                                         ring_data, skb);
 870                 recv_pkts++;
 871         }
 872
 873 out:
 874         /* make all data has been write before submit */
 875         if (clean_count + unused_count > 0)
 876                 hns_nic_alloc_rx_buffers(ring_data,
 877                                          clean_count + unused_count);
 878
 879         return recv_pkts;
 880 }
 881
 882 static bool hns_nic_rx_fini_pro(struct hns_nic_ring_data *ring_data)
 883 {
 884         struct hnae_ring *ring = ring_data->ring;
 885         int num = 0;
 886         bool rx_stopped;
 887
 888         hns_update_rx_rate(ring);
 889
 890         /* for hardware bug fixed */
 891         ring_data->ring->q->handle->dev->ops->toggle_ring_irq(ring, 0);
 892         num = readl_relaxed(ring->io_base + RCB_REG_FBDNUM);
 893
 894         if (num <= hns_coal_rx_bdnum(ring)) {
 895                 if (ring->q->handle->coal_adapt_en)
 896                         hns_nic_adpt_coalesce(ring_data);
 897
 898                 rx_stopped = true;
 899         } else {
 900                 ring_data->ring->q->handle->dev->ops->toggle_ring_irq(
 901                         ring_data->ring, 1);
 902
 903                 rx_stopped = false;
 904         }
 905
 906         return rx_stopped;
 907 }
 908
 909 static bool hns_nic_rx_fini_pro_v2(struct hns_nic_ring_data *ring_data)
 910 {
 911         struct hnae_ring *ring = ring_data->ring;
 912         int num;
 913
 914         hns_update_rx_rate(ring);
 915         num = readl_relaxed(ring->io_base + RCB_REG_FBDNUM);
 916
 917         if (num <= hns_coal_rx_bdnum(ring)) {
 918                 if (ring->q->handle->coal_adapt_en)
 919                         hns_nic_adpt_coalesce(ring_data);
 920
 921                 return true;
 922         }
 923
 924         return false;
 925 }
 926
 927 static inline void hns_nic_reclaim_one_desc(struct hnae_ring *ring,
 928                                             int *bytes, int *pkts)
 929 {
 930         struct hnae_desc_cb *desc_cb = &ring->desc_cb[ring->next_to_clean];
 931
 932         (*pkts) += (desc_cb->type == DESC_TYPE_SKB);
 933         (*bytes) += desc_cb->length;
 934         /* desc_cb will be cleaned, after hnae_free_buffer_detach*/
 935         hnae_free_buffer_detach(ring, ring->next_to_clean);
 936
 937         ring_ptr_move_fw(ring, next_to_clean);
 938 }
 939
 940 static int is_valid_clean_head(struct hnae_ring *ring, int h)
 941 {
 942         int u = ring->next_to_use;
 943         int c = ring->next_to_clean;
 944
 945         if (unlikely(h > ring->desc_num))
 946                 return 0;
 947
 948         assert(u > 0 && u < ring->desc_num);
 949         assert(c > 0 && c < ring->desc_num);
 950         assert(u != c && h != c); /* must be checked before call this func */
 951
 952         return u > c ? (h > c && h <= u) : (h > c || h <= u);
 953 }
 954
 955 /* netif_tx_lock will turn down the performance, set only when necessary */
 956 #ifdef CONFIG_NET_POLL_CONTROLLER
 957 #define NETIF_TX_LOCK(ring) spin_lock(&(ring)->lock)
 958 #define NETIF_TX_UNLOCK(ring) spin_unlock(&(ring)->lock)
 959 #else
 960 #define NETIF_TX_LOCK(ring)
 961 #define NETIF_TX_UNLOCK(ring)
 962 #endif
 963
 964 /* reclaim all desc in one budget
 965  * return error or number of desc left
 966  */
 967 static int hns_nic_tx_poll_one(struct hns_nic_ring_data *ring_data,
 968                                int budget, void *v)
 969 {
 970         struct hnae_ring *ring = ring_data->ring;
 971         struct net_device *ndev = ring_data->napi.dev;
 972         struct netdev_queue *dev_queue;
 973         struct hns_nic_priv *priv = netdev_priv(ndev);
 974         int head;
 975         int bytes, pkts;
 976
 977         NETIF_TX_LOCK(ring);
 978
 979         head = readl_relaxed(ring->io_base + RCB_REG_HEAD);
 980         rmb(); /* make sure head is ready before touch any data */
 981
 982         if (is_ring_empty(ring) || head == ring->next_to_clean) {
 983                 NETIF_TX_UNLOCK(ring);
 984                 return 0; /* no data to poll */
 985         }
 986
 987         if (!is_valid_clean_head(ring, head)) {
 988                 netdev_err(ndev, "wrong head (%d, %d-%d)\n", head,
 989                            ring->next_to_use, ring->next_to_clean);
 990                 ring->stats.io_err_cnt++;
 991                 NETIF_TX_UNLOCK(ring);
 992                 return -EIO;
 993         }
 994
 995         bytes = 0;
 996         pkts = 0;
 997         while (head != ring->next_to_clean) {
 998                 hns_nic_reclaim_one_desc(ring, &bytes, &pkts);
 999                 /* issue prefetch for next Tx descriptor */
1000                 prefetch(&ring->desc_cb[ring->next_to_clean]);
1001         }
1002
1003         NETIF_TX_UNLOCK(ring);
1004
1005         dev_queue = netdev_get_tx_queue(ndev, ring_data->queue_index);
1006         netdev_tx_completed_queue(dev_queue, pkts, bytes);
1007
1008         if (unlikely(priv->link && !netif_carrier_ok(ndev)))
1009                 netif_carrier_on(ndev);
1010
1011         if (unlikely(pkts && netif_carrier_ok(ndev) &&
1012                      (ring_space(ring) >= ring->max_desc_num_per_pkt * 2))) {
1013                 /* Make sure that anybody stopping the queue after this
1014                  * sees the new next_to_clean.
1015                  */
1016                 smp_mb();
1017                 if (netif_tx_queue_stopped(dev_queue) &&
1018                     !test_bit(NIC_STATE_DOWN, &priv->state)) {
1019                         netif_tx_wake_queue(dev_queue);
1020                         ring->stats.restart_queue++;
1021                 }
1022         }
1023         return 0;
1024 }
1025
1026 static bool hns_nic_tx_fini_pro(struct hns_nic_ring_data *ring_data)
1027 {
1028         struct hnae_ring *ring = ring_data->ring;
1029         int head;
1030
1031         ring_data->ring->q->handle->dev->ops->toggle_ring_irq(ring, 0);
1032
1033         head = readl_relaxed(ring->io_base + RCB_REG_HEAD);
1034
1035         if (head != ring->next_to_clean) {
1036                 ring_data->ring->q->handle->dev->ops->toggle_ring_irq(
1037                         ring_data->ring, 1);
1038
1039                 return false;
1040         } else {
1041                 return true;
1042         }
1043 }
1044
1045 static bool hns_nic_tx_fini_pro_v2(struct hns_nic_ring_data *ring_data)
1046 {
1047         struct hnae_ring *ring = ring_data->ring;
1048         int head = readl_relaxed(ring->io_base + RCB_REG_HEAD);
1049
1050         if (head == ring->next_to_clean)
1051                 return true;
1052         else
1053                 return false;
1054 }
1055
1056 static void hns_nic_tx_clr_all_bufs(struct hns_nic_ring_data *ring_data)
1057 {
1058         struct hnae_ring *ring = ring_data->ring;
1059         struct net_device *ndev = ring_data->napi.dev;
1060         struct netdev_queue *dev_queue;
1061         int head;
1062         int bytes, pkts;
1063
1064         NETIF_TX_LOCK(ring);
1065
1066         head = ring->next_to_use; /* ntu :soft setted ring position*/
1067         bytes = 0;
1068         pkts = 0;
1069         while (head != ring->next_to_clean)
1070                 hns_nic_reclaim_one_desc(ring, &bytes, &pkts);
1071
1072         NETIF_TX_UNLOCK(ring);
1073
1074         dev_queue = netdev_get_tx_queue(ndev, ring_data->queue_index);
1075         netdev_tx_reset_queue(dev_queue);
1076 }
1077
1078 static int hns_nic_common_poll(struct napi_struct *napi, int budget)
1079 {
1080         int clean_complete = 0;
1081         struct hns_nic_ring_data *ring_data =
1082                 container_of(napi, struct hns_nic_ring_data, napi);
1083         struct hnae_ring *ring = ring_data->ring;
1084
1085 try_again:
1086         clean_complete += ring_data->poll_one(
1087                                 ring_data, budget - clean_complete,
1088                                 ring_data->ex_process);
1089
1090         if (clean_complete < budget) {
1091                 if (ring_data->fini_process(ring_data)) {
1092                         napi_complete(napi);
1093                         ring->q->handle->dev->ops->toggle_ring_irq(ring, 0);
1094                 } else {
1095                         goto try_again;
1096                 }
1097         }
1098
1099         return clean_complete;
1100 }
1101
1102 static irqreturn_t hns_irq_handle(int irq, void *dev)
1103 {
1104         struct hns_nic_ring_data *ring_data = (struct hns_nic_ring_data *)dev;
1105
1106         ring_data->ring->q->handle->dev->ops->toggle_ring_irq(
1107                 ring_data->ring, 1);
1108         napi_schedule(&ring_data->napi);
1109
1110         return IRQ_HANDLED;
1111 }
1112
1113 /**
1114  *hns_nic_adjust_link - adjust net work mode by the phy stat or new param
1115  *@ndev: net device
1116  */
1117 static void hns_nic_adjust_link(struct net_device *ndev)
1118 {
1119         struct hns_nic_priv *priv = netdev_priv(ndev);
1120         struct hnae_handle *h = priv->ae_handle;
1121         int state = 1;
1122
1123         /* If there is no phy, do not need adjust link */
1124         if (ndev->phydev) {
1125                 /* When phy link down, do nothing */
1126                 if (ndev->phydev->link == 0)
1127                         return;
1128
1129                 if (h->dev->ops->need_adjust_link(h, ndev->phydev->speed,
1130                                                   ndev->phydev->duplex)) {
1131                         /* because Hi161X chip don't support to change gmac
1132                          * speed and duplex with traffic. Delay 200ms to
1133                          * make sure there is no more data in chip FIFO.
1134                          */
1135                         netif_carrier_off(ndev);
1136                         msleep(200);
1137                         h->dev->ops->adjust_link(h, ndev->phydev->speed,
1138                                                  ndev->phydev->duplex);
1139                         netif_carrier_on(ndev);
1140                 }
1141         }
1142
1143         state = state && h->dev->ops->get_status(h);
1144
1145         if (state != priv->link) {
1146                 if (state) {
1147                         netif_carrier_on(ndev);
1148                         netif_tx_wake_all_queues(ndev);
1149                         netdev_info(ndev, "link up\n");
1150                 } else {
1151                         netif_carrier_off(ndev);
1152                         netdev_info(ndev, "link down\n");
1153                 }
1154                 priv->link = state;
1155         }
1156 }
1157
1158 /**
1159  *hns_nic_init_phy - init phy
1160  *@ndev: net device
1161  *@h: ae handle
1162  * Return 0 on success, negative on failure
1163  */
1164 int hns_nic_init_phy(struct net_device *ndev, struct hnae_handle *h)
1165 {
1166         __ETHTOOL_DECLARE_LINK_MODE_MASK(supported) = { 0, };
1167         struct phy_device *phy_dev = h->phy_dev;
1168         int ret;
1169
1170         if (!h->phy_dev)
1171                 return 0;
1172
1173         if (h->phy_if != PHY_INTERFACE_MODE_XGMII) {
1174                 phy_dev->dev_flags = 0;
1175
1176                 ret = phy_connect_direct(ndev, phy_dev, hns_nic_adjust_link,
1177                                          h->phy_if);
1178         } else {
1179                 ret = phy_attach_direct(ndev, phy_dev, 0, h->phy_if);
1180         }
1181         if (unlikely(ret))
1182                 return -ENODEV;
1183
1184         ethtool_convert_legacy_u32_to_link_mode(supported, h->if_support);
1185         linkmode_and(phy_dev->supported, phy_dev->supported, supported);
1186         linkmode_copy(phy_dev->advertising, phy_dev->supported);
1187
1188         if (h->phy_if == PHY_INTERFACE_MODE_XGMII)
1189                 phy_dev->autoneg = false;
1190
1191         if (h->phy_if == PHY_INTERFACE_MODE_SGMII)
1192                 phy_stop(phy_dev);
1193
1194         return 0;
1195 }
1196
1197 static int hns_nic_ring_open(struct net_device *netdev, int idx)
1198 {
1199         struct hns_nic_priv *priv = netdev_priv(netdev);
1200         struct hnae_handle *h = priv->ae_handle;
1201
1202         napi_enable(&priv->ring_data[idx].napi);
1203
1204         enable_irq(priv->ring_data[idx].ring->irq);
1205         h->dev->ops->toggle_ring_irq(priv->ring_data[idx].ring, 0);
1206
1207         return 0;
1208 }
1209
1210 static int hns_nic_net_set_mac_address(struct net_device *ndev, void *p)
1211 {
1212         struct hns_nic_priv *priv = netdev_priv(ndev);
1213         struct hnae_handle *h = priv->ae_handle;
1214         struct sockaddr *mac_addr = p;
1215         int ret;
1216
1217         if (!mac_addr || !is_valid_ether_addr((const u8 *)mac_addr->sa_data))
1218                 return -EADDRNOTAVAIL;
1219
1220         ret = h->dev->ops->set_mac_addr(h, mac_addr->sa_data);
1221         if (ret) {
1222                 netdev_err(ndev, "set_mac_address fail, ret=%d!\n", ret);
1223                 return ret;
1224         }
1225
1226         memcpy(ndev->dev_addr, mac_addr->sa_data, ndev->addr_len);
1227
1228         return 0;
1229 }
1230
1231 static void hns_nic_update_stats(struct net_device *netdev)
1232 {
1233         struct hns_nic_priv *priv = netdev_priv(netdev);
1234         struct hnae_handle *h = priv->ae_handle;
1235
1236         h->dev->ops->update_stats(h, &netdev->stats);
1237 }
1238
1239 /* set mac addr if it is configed. or leave it to the AE driver */
1240 static void hns_init_mac_addr(struct net_device *ndev)
1241 {
1242         struct hns_nic_priv *priv = netdev_priv(ndev);
1243
1244         if (!device_get_mac_address(priv->dev, ndev->dev_addr, ETH_ALEN)) {
1245                 eth_hw_addr_random(ndev);
1246                 dev_warn(priv->dev, "No valid mac, use random mac %pM",
1247                          ndev->dev_addr);
1248         }
1249 }
1250
1251 static void hns_nic_ring_close(struct net_device *netdev, int idx)
1252 {
1253         struct hns_nic_priv *priv = netdev_priv(netdev);
1254         struct hnae_handle *h = priv->ae_handle;
1255
1256         h->dev->ops->toggle_ring_irq(priv->ring_data[idx].ring, 1);
1257         disable_irq(priv->ring_data[idx].ring->irq);
1258
1259         napi_disable(&priv->ring_data[idx].napi);
1260 }
1261
1262 static int hns_nic_init_affinity_mask(int q_num, int ring_idx,
1263                                       struct hnae_ring *ring, cpumask_t *mask)
1264 {
1265         int cpu;
1266
1267         /* Diffrent irq banlance between 16core and 32core.
1268          * The cpu mask set by ring index according to the ring flag
1269          * which indicate the ring is tx or rx.
1270          */
1271         if (q_num == num_possible_cpus()) {
1272                 if (is_tx_ring(ring))
1273                         cpu = ring_idx;
1274                 else
1275                         cpu = ring_idx - q_num;
1276         } else {
1277                 if (is_tx_ring(ring))
1278                         cpu = ring_idx * 2;
1279                 else
1280                         cpu = (ring_idx - q_num) * 2 + 1;
1281         }
1282
1283         cpumask_clear(mask);
1284         cpumask_set_cpu(cpu, mask);
1285
1286         return cpu;
1287 }
1288
1289 static void hns_nic_free_irq(int q_num, struct hns_nic_priv *priv)
1290 {
1291         int i;
1292
1293         for (i = 0; i < q_num * 2; i++) {
1294                 if (priv->ring_data[i].ring->irq_init_flag == RCB_IRQ_INITED) {
1295                         irq_set_affinity_hint(priv->ring_data[i].ring->irq,
1296                                               NULL);
1297                         free_irq(priv->ring_data[i].ring->irq,
1298                                  &priv->ring_data[i]);
1299                         priv->ring_data[i].ring->irq_init_flag =
1300                                 RCB_IRQ_NOT_INITED;
1301                 }
1302         }
1303 }
1304
1305 static int hns_nic_init_irq(struct hns_nic_priv *priv)
1306 {
1307         struct hnae_handle *h = priv->ae_handle;
1308         struct hns_nic_ring_data *rd;
1309         int i;
1310         int ret;
1311         int cpu;
1312
1313         for (i = 0; i < h->q_num * 2; i++) {
1314                 rd = &priv->ring_data[i];
1315
1316                 if (rd->ring->irq_init_flag == RCB_IRQ_INITED)
1317                         break;
1318
1319                 snprintf(rd->ring->ring_name, RCB_RING_NAME_LEN,
1320                          "%s-%s%d", priv->netdev->name,
1321                          (is_tx_ring(rd->ring) ? "tx" : "rx"), rd->queue_index);
1322
1323                 rd->ring->ring_name[RCB_RING_NAME_LEN - 1] = '\0';
1324
1325                 ret = request_irq(rd->ring->irq,
1326                                   hns_irq_handle, 0, rd->ring->ring_name, rd);
1327                 if (ret) {
1328                         netdev_err(priv->netdev, "request irq(%d) fail\n",
1329                                    rd->ring->irq);
1330                         goto out_free_irq;
1331                 }
1332                 disable_irq(rd->ring->irq);
1333
1334                 cpu = hns_nic_init_affinity_mask(h->q_num, i,
1335                                                  rd->ring, &rd->mask);
1336
1337                 if (cpu_online(cpu))
1338                         irq_set_affinity_hint(rd->ring->irq,
1339                                               &rd->mask);
1340
1341                 rd->ring->irq_init_flag = RCB_IRQ_INITED;
1342         }
1343
1344         return 0;
1345
1346 out_free_irq:
1347         hns_nic_free_irq(h->q_num, priv);
1348         return ret;
1349 }
1350
1351 static int hns_nic_net_up(struct net_device *ndev)
1352 {
1353         struct hns_nic_priv *priv = netdev_priv(ndev);
1354         struct hnae_handle *h = priv->ae_handle;
1355         int i, j;
1356         int ret;
1357
1358         if (!test_bit(NIC_STATE_DOWN, &priv->state))
1359                 return 0;
1360
1361         ret = hns_nic_init_irq(priv);
1362         if (ret != 0) {
1363                 netdev_err(ndev, "hns init irq failed! ret=%d\n", ret);
1364                 return ret;
1365         }
1366
1367         for (i = 0; i < h->q_num * 2; i++) {
1368                 ret = hns_nic_ring_open(ndev, i);
1369                 if (ret)
1370                         goto out_has_some_queues;
1371         }
1372
1373         ret = h->dev->ops->set_mac_addr(h, ndev->dev_addr);
1374         if (ret)
1375                 goto out_set_mac_addr_err;
1376
1377         ret = h->dev->ops->start ? h->dev->ops->start(h) : 0;
1378         if (ret)
1379                 goto out_start_err;
1380
1381         if (ndev->phydev)
1382                 phy_start(ndev->phydev);
1383
1384         clear_bit(NIC_STATE_DOWN, &priv->state);
1385         (void)mod_timer(&priv->service_timer, jiffies + SERVICE_TIMER_HZ);
1386
1387         return 0;
1388
1389 out_start_err:
1390         netif_stop_queue(ndev);
1391 out_set_mac_addr_err:
1392 out_has_some_queues:
1393         for (j = i - 1; j >= 0; j--)
1394                 hns_nic_ring_close(ndev, j);
1395
1396         hns_nic_free_irq(h->q_num, priv);
1397         set_bit(NIC_STATE_DOWN, &priv->state);
1398
1399         return ret;
1400 }
1401
1402 static void hns_nic_net_down(struct net_device *ndev)
1403 {
1404         int i;
1405         struct hnae_ae_ops *ops;
1406         struct hns_nic_priv *priv = netdev_priv(ndev);
1407
1408         if (test_and_set_bit(NIC_STATE_DOWN, &priv->state))
1409                 return;
1410
1411         (void)del_timer_sync(&priv->service_timer);
1412         netif_tx_stop_all_queues(ndev);
1413         netif_carrier_off(ndev);
1414         netif_tx_disable(ndev);
1415         priv->link = 0;
1416
1417         if (ndev->phydev)
1418                 phy_stop(ndev->phydev);
1419
1420         ops = priv->ae_handle->dev->ops;
1421
1422         if (ops->stop)
1423                 ops->stop(priv->ae_handle);
1424
1425         netif_tx_stop_all_queues(ndev);
1426
1427         for (i = priv->ae_handle->q_num - 1; i >= 0; i--) {
1428                 hns_nic_ring_close(ndev, i);
1429                 hns_nic_ring_close(ndev, i + priv->ae_handle->q_num);
1430
1431                 /* clean tx buffers*/
1432                 hns_nic_tx_clr_all_bufs(priv->ring_data + i);
1433         }
1434 }
1435
1436 void hns_nic_net_reset(struct net_device *ndev)
1437 {
1438         struct hns_nic_priv *priv = netdev_priv(ndev);
1439         struct hnae_handle *handle = priv->ae_handle;
1440
1441         while (test_and_set_bit(NIC_STATE_RESETTING, &priv->state))
1442                 usleep_range(1000, 2000);
1443
1444         (void)hnae_reinit_handle(handle);
1445
1446         clear_bit(NIC_STATE_RESETTING, &priv->state);
1447 }
1448
1449 void hns_nic_net_reinit(struct net_device *netdev)
1450 {
1451         struct hns_nic_priv *priv = netdev_priv(netdev);
1452         enum hnae_port_type type = priv->ae_handle->port_type;
1453
1454         netif_trans_update(priv->netdev);
1455         while (test_and_set_bit(NIC_STATE_REINITING, &priv->state))
1456                 usleep_range(1000, 2000);
1457
1458         hns_nic_net_down(netdev);
1459
1460         /* Only do hns_nic_net_reset in debug mode
1461          * because of hardware limitation.
1462          */
1463         if (type == HNAE_PORT_DEBUG)
1464                 hns_nic_net_reset(netdev);
1465
1466         (void)hns_nic_net_up(netdev);
1467         clear_bit(NIC_STATE_REINITING, &priv->state);
1468 }
1469
1470 static int hns_nic_net_open(struct net_device *ndev)
1471 {
1472         struct hns_nic_priv *priv = netdev_priv(ndev);
1473         struct hnae_handle *h = priv->ae_handle;
1474         int ret;
1475
1476         if (test_bit(NIC_STATE_TESTING, &priv->state))
1477                 return -EBUSY;
1478
1479         priv->link = 0;
1480         netif_carrier_off(ndev);
1481
1482         ret = netif_set_real_num_tx_queues(ndev, h->q_num);
1483         if (ret < 0) {
1484                 netdev_err(ndev, "netif_set_real_num_tx_queues fail, ret=%d!\n",
1485                            ret);
1486                 return ret;
1487         }
1488
1489         ret = netif_set_real_num_rx_queues(ndev, h->q_num);
1490         if (ret < 0) {
1491                 netdev_err(ndev,
1492                            "netif_set_real_num_rx_queues fail, ret=%d!\n", ret);
1493                 return ret;
1494         }
1495
1496         ret = hns_nic_net_up(ndev);
1497         if (ret) {
1498                 netdev_err(ndev,
1499                            "hns net up fail, ret=%d!\n", ret);
1500                 return ret;
1501         }
1502
1503         return 0;
1504 }
1505
1506 static int hns_nic_net_stop(struct net_device *ndev)
1507 {
1508         hns_nic_net_down(ndev);
1509
1510         return 0;
1511 }
1512
1513 static void hns_tx_timeout_reset(struct hns_nic_priv *priv);
1514 #define HNS_TX_TIMEO_LIMIT (40 * HZ)
1515 static void hns_nic_net_timeout(struct net_device *ndev)
1516 {
1517         struct hns_nic_priv *priv = netdev_priv(ndev);
1518
1519         if (ndev->watchdog_timeo < HNS_TX_TIMEO_LIMIT) {
1520                 ndev->watchdog_timeo *= 2;
1521                 netdev_info(ndev, "watchdog_timo changed to %d.\n",
1522                             ndev->watchdog_timeo);
1523         } else {
1524                 ndev->watchdog_timeo = HNS_NIC_TX_TIMEOUT;
1525                 hns_tx_timeout_reset(priv);
1526         }
1527 }
1528
1529 static int hns_nic_do_ioctl(struct net_device *netdev, struct ifreq *ifr,
1530                             int cmd)
1531 {
1532         struct phy_device *phy_dev = netdev->phydev;
1533
1534         if (!netif_running(netdev))
1535                 return -EINVAL;
1536
1537         if (!phy_dev)
1538                 return -ENOTSUPP;
1539
1540         return phy_mii_ioctl(phy_dev, ifr, cmd);
1541 }
1542
1543 static netdev_tx_t hns_nic_net_xmit(struct sk_buff *skb,
1544                                     struct net_device *ndev)
1545 {
1546         struct hns_nic_priv *priv = netdev_priv(ndev);
1547
1548         assert(skb->queue_mapping < ndev->ae_handle->q_num);
1549
1550         return hns_nic_net_xmit_hw(ndev, skb,
1551                                    &tx_ring_data(priv, skb->queue_mapping));
1552 }
1553
1554 static void hns_nic_drop_rx_fetch(struct hns_nic_ring_data *ring_data,
1555                                   struct sk_buff *skb)
1556 {
1557         dev_kfree_skb_any(skb);
1558 }
1559
1560 #define HNS_LB_TX_RING  0
1561 static struct sk_buff *hns_assemble_skb(struct net_device *ndev)
1562 {
1563         struct sk_buff *skb;
1564         struct ethhdr *ethhdr;
1565         int frame_len;
1566
1567         /* allocate test skb */
1568         skb = alloc_skb(64, GFP_KERNEL);
1569         if (!skb)
1570                 return NULL;
1571
1572         skb_put(skb, 64);
1573         skb->dev = ndev;
1574         memset(skb->data, 0xFF, skb->len);
1575
1576         /* must be tcp/ip package */
1577         ethhdr = (struct ethhdr *)skb->data;
1578         ethhdr->h_proto = htons(ETH_P_IP);
1579
1580         frame_len = skb->len & (~1ul);
1581         memset(&skb->data[frame_len / 2], 0xAA,
1582                frame_len / 2 - 1);
1583
1584         skb->queue_mapping = HNS_LB_TX_RING;
1585
1586         return skb;
1587 }
1588
1589 static int hns_enable_serdes_lb(struct net_device *ndev)
1590 {
1591         struct hns_nic_priv *priv = netdev_priv(ndev);
1592         struct hnae_handle *h = priv->ae_handle;
1593         struct hnae_ae_ops *ops = h->dev->ops;
1594         int speed, duplex;
1595         int ret;
1596
1597         ret = ops->set_loopback(h, MAC_INTERNALLOOP_SERDES, 1);
1598         if (ret)
1599                 return ret;
1600
1601         ret = ops->start ? ops->start(h) : 0;
1602         if (ret)
1603                 return ret;
1604
1605         /* link adjust duplex*/
1606         if (h->phy_if != PHY_INTERFACE_MODE_XGMII)
1607                 speed = 1000;
1608         else
1609                 speed = 10000;
1610         duplex = 1;
1611
1612         ops->adjust_link(h, speed, duplex);
1613
1614         /* wait h/w ready */
1615         mdelay(300);
1616
1617         return 0;
1618 }
1619
1620 static void hns_disable_serdes_lb(struct net_device *ndev)
1621 {
1622         struct hns_nic_priv *priv = netdev_priv(ndev);
1623         struct hnae_handle *h = priv->ae_handle;
1624         struct hnae_ae_ops *ops = h->dev->ops;
1625
1626         ops->stop(h);
1627         ops->set_loopback(h, MAC_INTERNALLOOP_SERDES, 0);
1628 }
1629
1630 /**
1631  *hns_nic_clear_all_rx_fetch - clear the chip fetched descriptions. The
1632  *function as follows:
1633  *    1. if one rx ring has found the page_offset is not equal 0 between head
1634  *       and tail, it means that the chip fetched the wrong descs for the ring
1635  *       which buffer size is 4096.
1636  *    2. we set the chip serdes loopback and set rss indirection to the ring.
1637  *    3. construct 64-bytes ip broadcast packages, wait the associated rx ring
1638  *       recieving all packages and it will fetch new descriptions.
1639  *    4. recover to the original state.
1640  *
1641  *@ndev: net device
1642  */
1643 static int hns_nic_clear_all_rx_fetch(struct net_device *ndev)
1644 {
1645         struct hns_nic_priv *priv = netdev_priv(ndev);
1646         struct hnae_handle *h = priv->ae_handle;
1647         struct hnae_ae_ops *ops = h->dev->ops;
1648         struct hns_nic_ring_data *rd;
1649         struct hnae_ring *ring;
1650         struct sk_buff *skb;
1651         u32 *org_indir;
1652         u32 *cur_indir;
1653         int indir_size;
1654         int head, tail;
1655         int fetch_num;
1656         int i, j;
1657         bool found;
1658         int retry_times;
1659         int ret = 0;
1660
1661         /* alloc indir memory */
1662         indir_size = ops->get_rss_indir_size(h) * sizeof(*org_indir);
1663         org_indir = kzalloc(indir_size, GFP_KERNEL);
1664         if (!org_indir)
1665                 return -ENOMEM;
1666
1667         /* store the orginal indirection */
1668         ops->get_rss(h, org_indir, NULL, NULL);
1669
1670         cur_indir = kzalloc(indir_size, GFP_KERNEL);
1671         if (!cur_indir) {
1672                 ret = -ENOMEM;
1673                 goto cur_indir_alloc_err;
1674         }
1675
1676         /* set loopback */
1677         if (hns_enable_serdes_lb(ndev)) {
1678                 ret = -EINVAL;
1679                 goto enable_serdes_lb_err;
1680         }
1681
1682         /* foreach every rx ring to clear fetch desc */
1683         for (i = 0; i < h->q_num; i++) {
1684                 ring = &h->qs[i]->rx_ring;
1685                 head = readl_relaxed(ring->io_base + RCB_REG_HEAD);
1686                 tail = readl_relaxed(ring->io_base + RCB_REG_TAIL);
1687                 found = false;
1688                 fetch_num = ring_dist(ring, head, tail);
1689
1690                 while (head != tail) {
1691                         if (ring->desc_cb[head].page_offset != 0) {
1692                                 found = true;
1693                                 break;
1694                         }
1695
1696                         head++;
1697                         if (head == ring->desc_num)
1698                                 head = 0;
1699                 }
1700
1701                 if (found) {
1702                         for (j = 0; j < indir_size / sizeof(*org_indir); j++)
1703                                 cur_indir[j] = i;
1704                         ops->set_rss(h, cur_indir, NULL, 0);
1705
1706                         for (j = 0; j < fetch_num; j++) {
1707                                 /* alloc one skb and init */
1708                                 skb = hns_assemble_skb(ndev);
1709                                 if (!skb)
1710                                         goto out;
1711                                 rd = &tx_ring_data(priv, skb->queue_mapping);
1712                                 hns_nic_net_xmit_hw(ndev, skb, rd);
1713
1714                                 retry_times = 0;
1715                                 while (retry_times++ < 10) {
1716                                         mdelay(10);
1717                                         /* clean rx */
1718                                         rd = &rx_ring_data(priv, i);
1719                                         if (rd->poll_one(rd, fetch_num,
1720                                                          hns_nic_drop_rx_fetch))
1721                                                 break;
1722                                 }
1723
1724                                 retry_times = 0;
1725                                 while (retry_times++ < 10) {
1726                                         mdelay(10);
1727                                         /* clean tx ring 0 send package */
1728                                         rd = &tx_ring_data(priv,
1729                                                            HNS_LB_TX_RING);
1730                                         if (rd->poll_one(rd, fetch_num, NULL))
1731                                                 break;
1732                                 }
1733                         }
1734                 }
1735         }
1736
1737 out:
1738         /* restore everything */
1739         ops->set_rss(h, org_indir, NULL, 0);
1740         hns_disable_serdes_lb(ndev);
1741 enable_serdes_lb_err:
1742         kfree(cur_indir);
1743 cur_indir_alloc_err:
1744         kfree(org_indir);
1745
1746         return ret;
1747 }
1748
1749 static int hns_nic_change_mtu(struct net_device *ndev, int new_mtu)
1750 {
1751         struct hns_nic_priv *priv = netdev_priv(ndev);
1752         struct hnae_handle *h = priv->ae_handle;
1753         bool if_running = netif_running(ndev);
1754         int ret;
1755
1756         /* MTU < 68 is an error and causes problems on some kernels */
1757         if (new_mtu < 68)
1758                 return -EINVAL;
1759
1760         /* MTU no change */
1761         if (new_mtu == ndev->mtu)
1762                 return 0;
1763
1764         if (!h->dev->ops->set_mtu)
1765                 return -ENOTSUPP;
1766
1767         if (if_running) {
1768                 (void)hns_nic_net_stop(ndev);
1769                 msleep(100);
1770         }
1771
1772         if (priv->enet_ver != AE_VERSION_1 &&
1773             ndev->mtu <= BD_SIZE_2048_MAX_MTU &&
1774             new_mtu > BD_SIZE_2048_MAX_MTU) {
1775                 /* update desc */
1776                 hnae_reinit_all_ring_desc(h);
1777
1778                 /* clear the package which the chip has fetched */
1779                 ret = hns_nic_clear_all_rx_fetch(ndev);
1780
1781                 /* the page offset must be consist with desc */
1782                 hnae_reinit_all_ring_page_off(h);
1783
1784                 if (ret) {
1785                         netdev_err(ndev, "clear the fetched desc fail\n");
1786                         goto out;
1787                 }
1788         }
1789
1790         ret = h->dev->ops->set_mtu(h, new_mtu);
1791         if (ret) {
1792                 netdev_err(ndev, "set mtu fail, return value %d\n",
1793                            ret);
1794                 goto out;
1795         }
1796
1797         /* finally, set new mtu to netdevice */
1798         ndev->mtu = new_mtu;
1799
1800 out:
1801         if (if_running) {
1802                 if (hns_nic_net_open(ndev)) {
1803                         netdev_err(ndev, "hns net open fail\n");
1804                         ret = -EINVAL;
1805                 }
1806         }
1807
1808         return ret;
1809 }
1810
1811 static int hns_nic_set_features(struct net_device *netdev,
1812                                 netdev_features_t features)
1813 {
1814         struct hns_nic_priv *priv = netdev_priv(netdev);
1815
1816         switch (priv->enet_ver) {
1817         case AE_VERSION_1:
1818                 if (features & (NETIF_F_TSO | NETIF_F_TSO6))
1819                         netdev_info(netdev, "enet v1 do not support tso!\n");
1820                 break;
1821         default:
1822                 if (features & (NETIF_F_TSO | NETIF_F_TSO6)) {
1823                         priv->ops.fill_desc = fill_tso_desc;
1824                         priv->ops.maybe_stop_tx = hns_nic_maybe_stop_tso;
1825                         /* The chip only support 7*4096 */
1826                         netif_set_gso_max_size(netdev, 7 * 4096);
1827                 } else {
1828                         priv->ops.fill_desc = fill_v2_desc;
1829                         priv->ops.maybe_stop_tx = hns_nic_maybe_stop_tx;
1830                 }
1831                 break;
1832         }
1833         netdev->features = features;
1834         return 0;
1835 }
1836
1837 static netdev_features_t hns_nic_fix_features(
1838                 struct net_device *netdev, netdev_features_t features)
1839 {
1840         struct hns_nic_priv *priv = netdev_priv(netdev);
1841
1842         switch (priv->enet_ver) {
1843         case AE_VERSION_1:
1844                 features &= ~(NETIF_F_TSO | NETIF_F_TSO6 |
1845                                 NETIF_F_HW_VLAN_CTAG_FILTER);
1846                 break;
1847         default:
1848                 break;
1849         }
1850         return features;
1851 }
1852
1853 static int hns_nic_uc_sync(struct net_device *netdev, const unsigned char *addr)
1854 {
1855         struct hns_nic_priv *priv = netdev_priv(netdev);
1856         struct hnae_handle *h = priv->ae_handle;
1857
1858         if (h->dev->ops->add_uc_addr)
1859                 return h->dev->ops->add_uc_addr(h, addr);
1860
1861         return 0;
1862 }
1863
1864 static int hns_nic_uc_unsync(struct net_device *netdev,
1865                              const unsigned char *addr)
1866 {
1867         struct hns_nic_priv *priv = netdev_priv(netdev);
1868         struct hnae_handle *h = priv->ae_handle;
1869
1870         if (h->dev->ops->rm_uc_addr)
1871                 return h->dev->ops->rm_uc_addr(h, addr);
1872
1873         return 0;
1874 }
1875
1876 /**
1877  * nic_set_multicast_list - set mutl mac address
1878  * @netdev: net device
1879  * @p: mac address
1880  *
1881  * return void
1882  */
1883 static void hns_set_multicast_list(struct net_device *ndev)
1884 {
1885         struct hns_nic_priv *priv = netdev_priv(ndev);
1886         struct hnae_handle *h = priv->ae_handle;
1887         struct netdev_hw_addr *ha = NULL;
1888
1889         if (!h) {
1890                 netdev_err(ndev, "hnae handle is null\n");
1891                 return;
1892         }
1893
1894         if (h->dev->ops->clr_mc_addr)
1895                 if (h->dev->ops->clr_mc_addr(h))
1896                         netdev_err(ndev, "clear multicast address fail\n");
1897
1898         if (h->dev->ops->set_mc_addr) {
1899                 netdev_for_each_mc_addr(ha, ndev)
1900                         if (h->dev->ops->set_mc_addr(h, ha->addr))
1901                                 netdev_err(ndev, "set multicast fail\n");
1902         }
1903 }
1904
1905 static void hns_nic_set_rx_mode(struct net_device *ndev)
1906 {
1907         struct hns_nic_priv *priv = netdev_priv(ndev);
1908         struct hnae_handle *h = priv->ae_handle;
1909
1910         if (h->dev->ops->set_promisc_mode) {
1911                 if (ndev->flags & IFF_PROMISC)
1912                         h->dev->ops->set_promisc_mode(h, 1);
1913                 else
1914                         h->dev->ops->set_promisc_mode(h, 0);
1915         }
1916
1917         hns_set_multicast_list(ndev);
1918
1919         if (__dev_uc_sync(ndev, hns_nic_uc_sync, hns_nic_uc_unsync))
1920                 netdev_err(ndev, "sync uc address fail\n");
1921 }
1922
1923 static void hns_nic_get_stats64(struct net_device *ndev,
1924                                 struct rtnl_link_stats64 *stats)
1925 {
1926         int idx = 0;
1927         u64 tx_bytes = 0;
1928         u64 rx_bytes = 0;
1929         u64 tx_pkts = 0;
1930         u64 rx_pkts = 0;
1931         struct hns_nic_priv *priv = netdev_priv(ndev);
1932         struct hnae_handle *h = priv->ae_handle;
1933
1934         for (idx = 0; idx < h->q_num; idx++) {
1935                 tx_bytes += h->qs[idx]->tx_ring.stats.tx_bytes;
1936                 tx_pkts += h->qs[idx]->tx_ring.stats.tx_pkts;
1937                 rx_bytes += h->qs[idx]->rx_ring.stats.rx_bytes;
1938                 rx_pkts += h->qs[idx]->rx_ring.stats.rx_pkts;
1939         }
1940
1941         stats->tx_bytes = tx_bytes;
1942         stats->tx_packets = tx_pkts;
1943         stats->rx_bytes = rx_bytes;
1944         stats->rx_packets = rx_pkts;
1945
1946         stats->rx_errors = ndev->stats.rx_errors;
1947         stats->multicast = ndev->stats.multicast;
1948         stats->rx_length_errors = ndev->stats.rx_length_errors;
1949         stats->rx_crc_errors = ndev->stats.rx_crc_errors;
1950         stats->rx_missed_errors = ndev->stats.rx_missed_errors;
1951
1952         stats->tx_errors = ndev->stats.tx_errors;
1953         stats->rx_dropped = ndev->stats.rx_dropped;
1954         stats->tx_dropped = ndev->stats.tx_dropped;
1955         stats->collisions = ndev->stats.collisions;
1956         stats->rx_over_errors = ndev->stats.rx_over_errors;
1957         stats->rx_frame_errors = ndev->stats.rx_frame_errors;
1958         stats->rx_fifo_errors = ndev->stats.rx_fifo_errors;
1959         stats->tx_aborted_errors = ndev->stats.tx_aborted_errors;
1960         stats->tx_carrier_errors = ndev->stats.tx_carrier_errors;
1961         stats->tx_fifo_errors = ndev->stats.tx_fifo_errors;
1962         stats->tx_heartbeat_errors = ndev->stats.tx_heartbeat_errors;
1963         stats->tx_window_errors = ndev->stats.tx_window_errors;
1964         stats->rx_compressed = ndev->stats.rx_compressed;
1965         stats->tx_compressed = ndev->stats.tx_compressed;
1966 }
1967
1968 static u16
1969 hns_nic_select_queue(struct net_device *ndev, struct sk_buff *skb,
1970                      struct net_device *sb_dev,
1971                      select_queue_fallback_t fallback)
1972 {
1973         struct ethhdr *eth_hdr = (struct ethhdr *)skb->data;
1974         struct hns_nic_priv *priv = netdev_priv(ndev);
1975
1976         /* fix hardware broadcast/multicast packets queue loopback */
1977         if (!AE_IS_VER1(priv->enet_ver) &&
1978             is_multicast_ether_addr(eth_hdr->h_dest))
1979                 return 0;
1980         else
1981                 return fallback(ndev, skb, NULL);
1982 }
1983
1984 static const struct net_device_ops hns_nic_netdev_ops = {
1985         .ndo_open = hns_nic_net_open,
1986         .ndo_stop = hns_nic_net_stop,
1987         .ndo_start_xmit = hns_nic_net_xmit,
1988         .ndo_tx_timeout = hns_nic_net_timeout,
1989         .ndo_set_mac_address = hns_nic_net_set_mac_address,
1990         .ndo_change_mtu = hns_nic_change_mtu,
1991         .ndo_do_ioctl = hns_nic_do_ioctl,
1992         .ndo_set_features = hns_nic_set_features,
1993         .ndo_fix_features = hns_nic_fix_features,
1994         .ndo_get_stats64 = hns_nic_get_stats64,
1995         .ndo_set_rx_mode = hns_nic_set_rx_mode,
1996         .ndo_select_queue = hns_nic_select_queue,
1997 };
1998
1999 static void hns_nic_update_link_status(struct net_device *netdev)
2000 {
2001         struct hns_nic_priv *priv = netdev_priv(netdev);
2002
2003         struct hnae_handle *h = priv->ae_handle;
2004
2005         if (h->phy_dev) {
2006                 if (h->phy_if != PHY_INTERFACE_MODE_XGMII)
2007                         return;
2008
2009                 (void)genphy_read_status(h->phy_dev);
2010         }
2011         hns_nic_adjust_link(netdev);
2012 }
2013
2014 /* for dumping key regs*/
2015 static void hns_nic_dump(struct hns_nic_priv *priv)
2016 {
2017         struct hnae_handle *h = priv->ae_handle;
2018         struct hnae_ae_ops *ops = h->dev->ops;
2019         u32 *data, reg_num, i;
2020
2021         if (ops->get_regs_len && ops->get_regs) {
2022                 reg_num = ops->get_regs_len(priv->ae_handle);
2023                 reg_num = (reg_num + 3ul) & ~3ul;
2024                 data = kcalloc(reg_num, sizeof(u32), GFP_KERNEL);
2025                 if (data) {
2026                         ops->get_regs(priv->ae_handle, data);
2027                         for (i = 0; i < reg_num; i += 4)
2028                                 pr_info("0x%08x: 0x%08x 0x%08x 0x%08x 0x%08x\n",
2029                                         i, data[i], data[i + 1],
2030                                         data[i + 2], data[i + 3]);
2031                         kfree(data);
2032                 }
2033         }
2034
2035         for (i = 0; i < h->q_num; i++) {
2036                 pr_info("tx_queue%d_next_to_clean:%d\n",
2037                         i, h->qs[i]->tx_ring.next_to_clean);
2038                 pr_info("tx_queue%d_next_to_use:%d\n",
2039                         i, h->qs[i]->tx_ring.next_to_use);
2040                 pr_info("rx_queue%d_next_to_clean:%d\n",
2041                         i, h->qs[i]->rx_ring.next_to_clean);
2042                 pr_info("rx_queue%d_next_to_use:%d\n",
2043                         i, h->qs[i]->rx_ring.next_to_use);
2044         }
2045 }
2046
2047 /* for resetting subtask */
2048 static void hns_nic_reset_subtask(struct hns_nic_priv *priv)
2049 {
2050         enum hnae_port_type type = priv->ae_handle->port_type;
2051
2052         if (!test_bit(NIC_STATE2_RESET_REQUESTED, &priv->state))
2053                 return;
2054         clear_bit(NIC_STATE2_RESET_REQUESTED, &priv->state);
2055
2056         /* If we're already down, removing or resetting, just bail */
2057         if (test_bit(NIC_STATE_DOWN, &priv->state) ||
2058             test_bit(NIC_STATE_REMOVING, &priv->state) ||
2059             test_bit(NIC_STATE_RESETTING, &priv->state))
2060                 return;
2061
2062         hns_nic_dump(priv);
2063         netdev_info(priv->netdev, "try to reset %s port!\n",
2064                     (type == HNAE_PORT_DEBUG ? "debug" : "service"));
2065
2066         rtnl_lock();
2067         /* put off any impending NetWatchDogTimeout */
2068         netif_trans_update(priv->netdev);
2069         hns_nic_net_reinit(priv->netdev);
2070
2071         rtnl_unlock();
2072 }
2073
2074 /* for doing service complete*/
2075 static void hns_nic_service_event_complete(struct hns_nic_priv *priv)
2076 {
2077         WARN_ON(!test_bit(NIC_STATE_SERVICE_SCHED, &priv->state));
2078         /* make sure to commit the things */
2079         smp_mb__before_atomic();
2080         clear_bit(NIC_STATE_SERVICE_SCHED, &priv->state);
2081 }
2082
2083 static void hns_nic_service_task(struct work_struct *work)
2084 {
2085         struct hns_nic_priv *priv
2086                 = container_of(work, struct hns_nic_priv, service_task);
2087         struct hnae_handle *h = priv->ae_handle;
2088
2089         hns_nic_reset_subtask(priv);
2090         hns_nic_update_link_status(priv->netdev);
2091         h->dev->ops->update_led_status(h);
2092         hns_nic_update_stats(priv->netdev);
2093
2094         hns_nic_service_event_complete(priv);
2095 }
2096
2097 static void hns_nic_task_schedule(struct hns_nic_priv *priv)
2098 {
2099         if (!test_bit(NIC_STATE_DOWN, &priv->state) &&
2100             !test_bit(NIC_STATE_REMOVING, &priv->state) &&
2101             !test_and_set_bit(NIC_STATE_SERVICE_SCHED, &priv->state))
2102                 (void)schedule_work(&priv->service_task);
2103 }
2104
2105 static void hns_nic_service_timer(struct timer_list *t)
2106 {
2107         struct hns_nic_priv *priv = from_timer(priv, t, service_timer);
2108
2109         (void)mod_timer(&priv->service_timer, jiffies + SERVICE_TIMER_HZ);
2110
2111         hns_nic_task_schedule(priv);
2112 }
2113
2114 /**
2115  * hns_tx_timeout_reset - initiate reset due to Tx timeout
2116  * @priv: driver private struct
2117  **/
2118 static void hns_tx_timeout_reset(struct hns_nic_priv *priv)
2119 {
2120         /* Do the reset outside of interrupt context */
2121         if (!test_bit(NIC_STATE_DOWN, &priv->state)) {
2122                 set_bit(NIC_STATE2_RESET_REQUESTED, &priv->state);
2123                 netdev_warn(priv->netdev,
2124                             "initiating reset due to tx timeout(%llu,0x%lx)\n",
2125                             priv->tx_timeout_count, priv->state);
2126                 priv->tx_timeout_count++;
2127                 hns_nic_task_schedule(priv);
2128         }
2129 }
2130
2131 static int hns_nic_init_ring_data(struct hns_nic_priv *priv)
2132 {
2133         struct hnae_handle *h = priv->ae_handle;
2134         struct hns_nic_ring_data *rd;
2135         bool is_ver1 = AE_IS_VER1(priv->enet_ver);
2136         int i;
2137
2138         if (h->q_num > NIC_MAX_Q_PER_VF) {
2139                 netdev_err(priv->netdev, "too much queue (%d)\n", h->q_num);
2140                 return -EINVAL;
2141         }
2142
2143         priv->ring_data = kzalloc(array3_size(h->q_num,
2144                                               sizeof(*priv->ring_data), 2),
2145                                   GFP_KERNEL);
2146         if (!priv->ring_data)
2147                 return -ENOMEM;
2148
2149         for (i = 0; i < h->q_num; i++) {
2150                 rd = &priv->ring_data[i];
2151                 rd->queue_index = i;
2152                 rd->ring = &h->qs[i]->tx_ring;
2153                 rd->poll_one = hns_nic_tx_poll_one;
2154                 rd->fini_process = is_ver1 ? hns_nic_tx_fini_pro :
2155                         hns_nic_tx_fini_pro_v2;
2156
2157                 netif_napi_add(priv->netdev, &rd->napi,
2158                                hns_nic_common_poll, NIC_TX_CLEAN_MAX_NUM);
2159                 rd->ring->irq_init_flag = RCB_IRQ_NOT_INITED;
2160         }
2161         for (i = h->q_num; i < h->q_num * 2; i++) {
2162                 rd = &priv->ring_data[i];
2163                 rd->queue_index = i - h->q_num;
2164                 rd->ring = &h->qs[i - h->q_num]->rx_ring;
2165                 rd->poll_one = hns_nic_rx_poll_one;
2166                 rd->ex_process = hns_nic_rx_up_pro;
2167                 rd->fini_process = is_ver1 ? hns_nic_rx_fini_pro :
2168                         hns_nic_rx_fini_pro_v2;
2169
2170                 netif_napi_add(priv->netdev, &rd->napi,
2171                                hns_nic_common_poll, NIC_RX_CLEAN_MAX_NUM);
2172                 rd->ring->irq_init_flag = RCB_IRQ_NOT_INITED;
2173         }
2174
2175         return 0;
2176 }
2177
2178 static void hns_nic_uninit_ring_data(struct hns_nic_priv *priv)
2179 {
2180         struct hnae_handle *h = priv->ae_handle;
2181         int i;
2182
2183         for (i = 0; i < h->q_num * 2; i++) {
2184                 netif_napi_del(&priv->ring_data[i].napi);
2185                 if (priv->ring_data[i].ring->irq_init_flag == RCB_IRQ_INITED) {
2186                         (void)irq_set_affinity_hint(
2187                                 priv->ring_data[i].ring->irq,
2188                                 NULL);
2189                         free_irq(priv->ring_data[i].ring->irq,
2190                                  &priv->ring_data[i]);
2191                 }
2192
2193                 priv->ring_data[i].ring->irq_init_flag = RCB_IRQ_NOT_INITED;
2194         }
2195         kfree(priv->ring_data);
2196 }
2197
2198 static void hns_nic_set_priv_ops(struct net_device *netdev)
2199 {
2200         struct hns_nic_priv *priv = netdev_priv(netdev);
2201         struct hnae_handle *h = priv->ae_handle;
2202
2203         if (AE_IS_VER1(priv->enet_ver)) {
2204                 priv->ops.fill_desc = fill_desc;
2205                 priv->ops.get_rxd_bnum = get_rx_desc_bnum;
2206                 priv->ops.maybe_stop_tx = hns_nic_maybe_stop_tx;
2207         } else {
2208                 priv->ops.get_rxd_bnum = get_v2rx_desc_bnum;
2209                 if ((netdev->features & NETIF_F_TSO) ||
2210                     (netdev->features & NETIF_F_TSO6)) {
2211                         priv->ops.fill_desc = fill_tso_desc;
2212                         priv->ops.maybe_stop_tx = hns_nic_maybe_stop_tso;
2213                         /* This chip only support 7*4096 */
2214                         netif_set_gso_max_size(netdev, 7 * 4096);
2215                 } else {
2216                         priv->ops.fill_desc = fill_v2_desc;
2217                         priv->ops.maybe_stop_tx = hns_nic_maybe_stop_tx;
2218                 }
2219                 /* enable tso when init
2220                  * control tso on/off through TSE bit in bd
2221                  */
2222                 h->dev->ops->set_tso_stats(h, 1);
2223         }
2224 }
2225
2226 static int hns_nic_try_get_ae(struct net_device *ndev)
2227 {
2228         struct hns_nic_priv *priv = netdev_priv(ndev);
2229         struct hnae_handle *h;
2230         int ret;
2231
2232         h = hnae_get_handle(&priv->netdev->dev,
2233                             priv->fwnode, priv->port_id, NULL);
2234         if (IS_ERR_OR_NULL(h)) {
2235                 ret = -ENODEV;
2236                 dev_dbg(priv->dev, "has not handle, register notifier!\n");
2237                 goto out;
2238         }
2239         priv->ae_handle = h;
2240
2241         ret = hns_nic_init_phy(ndev, h);
2242         if (ret) {
2243                 dev_err(priv->dev, "probe phy device fail!\n");
2244                 goto out_init_phy;
2245         }
2246
2247         ret = hns_nic_init_ring_data(priv);
2248         if (ret) {
2249                 ret = -ENOMEM;
2250                 goto out_init_ring_data;
2251         }
2252
2253         hns_nic_set_priv_ops(ndev);
2254
2255         ret = register_netdev(ndev);
2256         if (ret) {
2257                 dev_err(priv->dev, "probe register netdev fail!\n");
2258                 goto out_reg_ndev_fail;
2259         }
2260         return 0;
2261
2262 out_reg_ndev_fail:
2263         hns_nic_uninit_ring_data(priv);
2264         priv->ring_data = NULL;
2265 out_init_phy:
2266 out_init_ring_data:
2267         hnae_put_handle(priv->ae_handle);
2268         priv->ae_handle = NULL;
2269 out:
2270         return ret;
2271 }
2272
2273 static int hns_nic_notifier_action(struct notifier_block *nb,
2274                                    unsigned long action, void *data)
2275 {
2276         struct hns_nic_priv *priv =
2277                 container_of(nb, struct hns_nic_priv, notifier_block);
2278
2279         assert(action == HNAE_AE_REGISTER);
2280
2281         if (!hns_nic_try_get_ae(priv->netdev)) {
2282                 hnae_unregister_notifier(&priv->notifier_block);
2283                 priv->notifier_block.notifier_call = NULL;
2284         }
2285         return 0;
2286 }
2287
2288 static int hns_nic_dev_probe(struct platform_device *pdev)
2289 {
2290         struct device *dev = &pdev->dev;
2291         struct net_device *ndev;
2292         struct hns_nic_priv *priv;
2293         u32 port_id;
2294         int ret;
2295
2296         ndev = alloc_etherdev_mq(sizeof(struct hns_nic_priv), NIC_MAX_Q_PER_VF);
2297         if (!ndev)
2298                 return -ENOMEM;
2299
2300         platform_set_drvdata(pdev, ndev);
2301
2302         priv = netdev_priv(ndev);
2303         priv->dev = dev;
2304         priv->netdev = ndev;
2305
2306         if (dev_of_node(dev)) {
2307                 struct device_node *ae_node;
2308
2309                 if (of_device_is_compatible(dev->of_node,
2310                                             "hisilicon,hns-nic-v1"))
2311                         priv->enet_ver = AE_VERSION_1;
2312                 else
2313                         priv->enet_ver = AE_VERSION_2;
2314
2315                 ae_node = of_parse_phandle(dev->of_node, "ae-handle", 0);
2316                 if (!ae_node) {
2317                         ret = -ENODEV;
2318                         dev_err(dev, "not find ae-handle\n");
2319                         goto out_read_prop_fail;
2320                 }
2321                 priv->fwnode = &ae_node->fwnode;
2322         } else if (is_acpi_node(dev->fwnode)) {
2323                 struct fwnode_reference_args args;
2324
2325                 if (acpi_dev_found(hns_enet_acpi_match[0].id))
2326                         priv->enet_ver = AE_VERSION_1;
2327                 else if (acpi_dev_found(hns_enet_acpi_match[1].id))
2328                         priv->enet_ver = AE_VERSION_2;
2329                 else
2330                         return -ENXIO;
2331
2332                 /* try to find port-idx-in-ae first */
2333                 ret = acpi_node_get_property_reference(dev->fwnode,
2334                                                        "ae-handle", 0, &args);
2335                 if (ret) {
2336                         dev_err(dev, "not find ae-handle\n");
2337                         goto out_read_prop_fail;
2338                 }
2339                 if (!is_acpi_device_node(args.fwnode)) {
2340                         ret = -EINVAL;
2341                         goto out_read_prop_fail;
2342                 }
2343                 priv->fwnode = args.fwnode;
2344         } else {
2345                 dev_err(dev, "cannot read cfg data from OF or acpi\n");
2346                 return -ENXIO;
2347         }
2348
2349         ret = device_property_read_u32(dev, "port-idx-in-ae", &port_id);
2350         if (ret) {
2351                 /* only for old code compatible */
2352                 ret = device_property_read_u32(dev, "port-id", &port_id);
2353                 if (ret)
2354                         goto out_read_prop_fail;
2355                 /* for old dts, we need to caculate the port offset */
2356                 port_id = port_id < HNS_SRV_OFFSET ? port_id + HNS_DEBUG_OFFSET
2357                         : port_id - HNS_SRV_OFFSET;
2358         }
2359         priv->port_id = port_id;
2360
2361         hns_init_mac_addr(ndev);
2362
2363         ndev->watchdog_timeo = HNS_NIC_TX_TIMEOUT;
2364         ndev->priv_flags |= IFF_UNICAST_FLT;
2365         ndev->netdev_ops = &hns_nic_netdev_ops;
2366         hns_ethtool_set_ops(ndev);
2367
2368         ndev->features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
2369                 NETIF_F_RXCSUM | NETIF_F_SG | NETIF_F_GSO |
2370                 NETIF_F_GRO;
2371         ndev->vlan_features |=
2372                 NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM | NETIF_F_RXCSUM;
2373         ndev->vlan_features |= NETIF_F_SG | NETIF_F_GSO | NETIF_F_GRO;
2374
2375         /* MTU range: 68 - 9578 (v1) or 9706 (v2) */
2376         ndev->min_mtu = MAC_MIN_MTU;
2377         switch (priv->enet_ver) {
2378         case AE_VERSION_2:
2379                 ndev->features |= NETIF_F_TSO | NETIF_F_TSO6 | NETIF_F_NTUPLE;
2380                 ndev->hw_features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
2381                         NETIF_F_RXCSUM | NETIF_F_SG | NETIF_F_GSO |
2382                         NETIF_F_GRO | NETIF_F_TSO | NETIF_F_TSO6;
2383                 ndev->max_mtu = MAC_MAX_MTU_V2 -
2384                                 (ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN);
2385                 break;
2386         default:
2387                 ndev->max_mtu = MAC_MAX_MTU -
2388                                 (ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN);
2389                 break;
2390         }
2391
2392         SET_NETDEV_DEV(ndev, dev);
2393
2394         if (!dma_set_mask_and_coherent(dev, DMA_BIT_MASK(64)))
2395                 dev_dbg(dev, "set mask to 64bit\n");
2396         else
2397                 dev_err(dev, "set mask to 64bit fail!\n");
2398
2399         /* carrier off reporting is important to ethtool even BEFORE open */
2400         netif_carrier_off(ndev);
2401
2402         timer_setup(&priv->service_timer, hns_nic_service_timer, 0);
2403         INIT_WORK(&priv->service_task, hns_nic_service_task);
2404
2405         set_bit(NIC_STATE_SERVICE_INITED, &priv->state);
2406         clear_bit(NIC_STATE_SERVICE_SCHED, &priv->state);
2407         set_bit(NIC_STATE_DOWN, &priv->state);
2408
2409         if (hns_nic_try_get_ae(priv->netdev)) {
2410                 priv->notifier_block.notifier_call = hns_nic_notifier_action;
2411                 ret = hnae_register_notifier(&priv->notifier_block);
2412                 if (ret) {
2413                         dev_err(dev, "register notifier fail!\n");
2414                         goto out_notify_fail;
2415                 }
2416                 dev_dbg(dev, "has not handle, register notifier!\n");
2417         }
2418
2419         return 0;
2420
2421 out_notify_fail:
2422         (void)cancel_work_sync(&priv->service_task);
2423 out_read_prop_fail:
2424         free_netdev(ndev);
2425         return ret;
2426 }
2427
2428 static int hns_nic_dev_remove(struct platform_device *pdev)
2429 {
2430         struct net_device *ndev = platform_get_drvdata(pdev);
2431         struct hns_nic_priv *priv = netdev_priv(ndev);
2432
2433         if (ndev->reg_state != NETREG_UNINITIALIZED)
2434                 unregister_netdev(ndev);
2435
2436         if (priv->ring_data)
2437                 hns_nic_uninit_ring_data(priv);
2438         priv->ring_data = NULL;
2439
2440         if (ndev->phydev)
2441                 phy_disconnect(ndev->phydev);
2442
2443         if (!IS_ERR_OR_NULL(priv->ae_handle))
2444                 hnae_put_handle(priv->ae_handle);
2445         priv->ae_handle = NULL;
2446         if (priv->notifier_block.notifier_call)
2447                 hnae_unregister_notifier(&priv->notifier_block);
2448         priv->notifier_block.notifier_call = NULL;
2449
2450         set_bit(NIC_STATE_REMOVING, &priv->state);
2451         (void)cancel_work_sync(&priv->service_task);
2452
2453         free_netdev(ndev);
2454         return 0;
2455 }
2456
2457 static const struct of_device_id hns_enet_of_match[] = {
2458         {.compatible = "hisilicon,hns-nic-v1",},
2459         {.compatible = "hisilicon,hns-nic-v2",},
2460         {},
2461 };
2462
2463 MODULE_DEVICE_TABLE(of, hns_enet_of_match);
2464
2465 static struct platform_driver hns_nic_dev_driver = {
2466         .driver = {
2467                 .name = "hns-nic",
2468                 .of_match_table = hns_enet_of_match,
2469                 .acpi_match_table = ACPI_PTR(hns_enet_acpi_match),
2470         },
2471         .probe = hns_nic_dev_probe,
2472         .remove = hns_nic_dev_remove,
2473 };
2474
2475 module_platform_driver(hns_nic_dev_driver);
2476
2477 MODULE_DESCRIPTION("HISILICON HNS Ethernet driver");
2478 MODULE_AUTHOR("Hisilicon, Inc.");
2479 MODULE_LICENSE("GPL");
2480 MODULE_ALIAS("platform:hns-nic");