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

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * Copyright (c) 2014-2015 Hisilicon Limited.
   4  */
   5
   6 #include <linux/clk.h>
   7 #include <linux/cpumask.h>
   8 #include <linux/etherdevice.h>
   9 #include <linux/if_vlan.h>
  10 #include <linux/interrupt.h>
  11 #include <linux/io.h>
  12 #include <linux/ip.h>
  13 #include <linux/ipv6.h>
  14 #include <linux/module.h>
  15 #include <linux/phy.h>
  16 #include <linux/platform_device.h>
  17 #include <linux/skbuff.h>
  18
  19 #include "hnae.h"
  20 #include "hns_enet.h"
  21 #include "hns_dsaf_mac.h"
  22
  23 #define NIC_MAX_Q_PER_VF 16
  24 #define HNS_NIC_TX_TIMEOUT (5 * HZ)
  25
  26 #define SERVICE_TIMER_HZ (1 * HZ)
  27
  28 #define RCB_IRQ_NOT_INITED 0
  29 #define RCB_IRQ_INITED 1
  30 #define HNS_BUFFER_SIZE_2048 2048
  31
  32 #define BD_MAX_SEND_SIZE 8191
  33 #define SKB_TMP_LEN(SKB) \
  34         (((SKB)->transport_header - (SKB)->mac_header) + tcp_hdrlen(SKB))
  35
  36 static void fill_v2_desc_hw(struct hnae_ring *ring, void *priv, int size,
  37                             int send_sz, dma_addr_t dma, int frag_end,
  38                             int buf_num, enum hns_desc_type type, int mtu)
  39 {
  40         struct hnae_desc *desc = &ring->desc[ring->next_to_use];
  41         struct hnae_desc_cb *desc_cb = &ring->desc_cb[ring->next_to_use];
  42         struct iphdr *iphdr;
  43         struct ipv6hdr *ipv6hdr;
  44         struct sk_buff *skb;
  45         __be16 protocol;
  46         u8 bn_pid = 0;
  47         u8 rrcfv = 0;
  48         u8 ip_offset = 0;
  49         u8 tvsvsn = 0;
  50         u16 mss = 0;
  51         u8 l4_len = 0;
  52         u16 paylen = 0;
  53
  54         desc_cb->priv = priv;
  55         desc_cb->length = size;
  56         desc_cb->dma = dma;
  57         desc_cb->type = type;
  58
  59         desc->addr = cpu_to_le64(dma);
  60         desc->tx.send_size = cpu_to_le16((u16)send_sz);
  61
  62         /* config bd buffer end */
  63         hnae_set_bit(rrcfv, HNSV2_TXD_VLD_B, 1);
  64         hnae_set_field(bn_pid, HNSV2_TXD_BUFNUM_M, 0, buf_num - 1);
  65
  66         /* fill port_id in the tx bd for sending management pkts */
  67         hnae_set_field(bn_pid, HNSV2_TXD_PORTID_M,
  68                        HNSV2_TXD_PORTID_S, ring->q->handle->dport_id);
  69
  70         if (type == DESC_TYPE_SKB) {
  71                 skb = (struct sk_buff *)priv;
  72
  73                 if (skb->ip_summed == CHECKSUM_PARTIAL) {
  74                         skb_reset_mac_len(skb);
  75                         protocol = skb->protocol;
  76                         ip_offset = ETH_HLEN;
  77
  78                         if (protocol == htons(ETH_P_8021Q)) {
  79                                 ip_offset += VLAN_HLEN;
  80                                 protocol = vlan_get_protocol(skb);
  81                                 skb->protocol = protocol;
  82                         }
  83
  84                         if (skb->protocol == htons(ETH_P_IP)) {
  85                                 iphdr = ip_hdr(skb);
  86                                 hnae_set_bit(rrcfv, HNSV2_TXD_L3CS_B, 1);
  87                                 hnae_set_bit(rrcfv, HNSV2_TXD_L4CS_B, 1);
  88
  89                                 /* check for tcp/udp header */
  90                                 if (iphdr->protocol == IPPROTO_TCP &&
  91                                     skb_is_gso(skb)) {
  92                                         hnae_set_bit(tvsvsn,
  93                                                      HNSV2_TXD_TSE_B, 1);
  94                                         l4_len = tcp_hdrlen(skb);
  95                                         mss = skb_shinfo(skb)->gso_size;
  96                                         paylen = skb->len - SKB_TMP_LEN(skb);
  97                                 }
  98                         } else if (skb->protocol == htons(ETH_P_IPV6)) {
  99                                 hnae_set_bit(tvsvsn, HNSV2_TXD_IPV6_B, 1);
 100                                 ipv6hdr = ipv6_hdr(skb);
 101                                 hnae_set_bit(rrcfv, HNSV2_TXD_L4CS_B, 1);
 102
 103                                 /* check for tcp/udp header */
 104                                 if (ipv6hdr->nexthdr == IPPROTO_TCP &&
 105                                     skb_is_gso(skb) && skb_is_gso_v6(skb)) {
 106                                         hnae_set_bit(tvsvsn,
 107                                                      HNSV2_TXD_TSE_B, 1);
 108                                         l4_len = tcp_hdrlen(skb);
 109                                         mss = skb_shinfo(skb)->gso_size;
 110                                         paylen = skb->len - SKB_TMP_LEN(skb);
 111                                 }
 112                         }
 113                         desc->tx.ip_offset = ip_offset;
 114                         desc->tx.tse_vlan_snap_v6_sctp_nth = tvsvsn;
 115                         desc->tx.mss = cpu_to_le16(mss);
 116                         desc->tx.l4_len = l4_len;
 117                         desc->tx.paylen = cpu_to_le16(paylen);
 118                 }
 119         }
 120
 121         hnae_set_bit(rrcfv, HNSV2_TXD_FE_B, frag_end);
 122
 123         desc->tx.bn_pid = bn_pid;
 124         desc->tx.ra_ri_cs_fe_vld = rrcfv;
 125
 126         ring_ptr_move_fw(ring, next_to_use);
 127 }
 128
 129 static void fill_v2_desc(struct hnae_ring *ring, void *priv,
 130                          int size, dma_addr_t dma, int frag_end,
 131                          int buf_num, enum hns_desc_type type, int mtu)
 132 {
 133         fill_v2_desc_hw(ring, priv, size, size, dma, frag_end,
 134                         buf_num, type, mtu);
 135 }
 136
 137 static const struct acpi_device_id hns_enet_acpi_match[] = {
 138         { "HISI00C1", 0 },
 139         { "HISI00C2", 0 },
 140         { },
 141 };
 142 MODULE_DEVICE_TABLE(acpi, hns_enet_acpi_match);
 143
 144 static void fill_desc(struct hnae_ring *ring, void *priv,
 145                       int size, dma_addr_t dma, int frag_end,
 146                       int buf_num, enum hns_desc_type type, int mtu)
 147 {
 148         struct hnae_desc *desc = &ring->desc[ring->next_to_use];
 149         struct hnae_desc_cb *desc_cb = &ring->desc_cb[ring->next_to_use];
 150         struct sk_buff *skb;
 151         __be16 protocol;
 152         u32 ip_offset;
 153         u32 asid_bufnum_pid = 0;
 154         u32 flag_ipoffset = 0;
 155
 156         desc_cb->priv = priv;
 157         desc_cb->length = size;
 158         desc_cb->dma = dma;
 159         desc_cb->type = type;
 160
 161         desc->addr = cpu_to_le64(dma);
 162         desc->tx.send_size = cpu_to_le16((u16)size);
 163
 164         /*config bd buffer end */
 165         flag_ipoffset |= 1 << HNS_TXD_VLD_B;
 166
 167         asid_bufnum_pid |= buf_num << HNS_TXD_BUFNUM_S;
 168
 169         if (type == DESC_TYPE_SKB) {
 170                 skb = (struct sk_buff *)priv;
 171
 172                 if (skb->ip_summed == CHECKSUM_PARTIAL) {
 173                         protocol = skb->protocol;
 174                         ip_offset = ETH_HLEN;
 175
 176                         /*if it is a SW VLAN check the next protocol*/
 177                         if (protocol == htons(ETH_P_8021Q)) {
 178                                 ip_offset += VLAN_HLEN;
 179                                 protocol = vlan_get_protocol(skb);
 180                                 skb->protocol = protocol;
 181                         }
 182
 183                         if (skb->protocol == htons(ETH_P_IP)) {
 184                                 flag_ipoffset |= 1 << HNS_TXD_L3CS_B;
 185                                 /* check for tcp/udp header */
 186                                 flag_ipoffset |= 1 << HNS_TXD_L4CS_B;
 187
 188                         } else if (skb->protocol == htons(ETH_P_IPV6)) {
 189                                 /* ipv6 has not l3 cs, check for L4 header */
 190                                 flag_ipoffset |= 1 << HNS_TXD_L4CS_B;
 191                         }
 192
 193                         flag_ipoffset |= ip_offset << HNS_TXD_IPOFFSET_S;
 194                 }
 195         }
 196
 197         flag_ipoffset |= frag_end << HNS_TXD_FE_B;
 198
 199         desc->tx.asid_bufnum_pid = cpu_to_le16(asid_bufnum_pid);
 200         desc->tx.flag_ipoffset = cpu_to_le32(flag_ipoffset);
 201
 202         ring_ptr_move_fw(ring, next_to_use);
 203 }
 204
 205 static void unfill_desc(struct hnae_ring *ring)
 206 {
 207         ring_ptr_move_bw(ring, next_to_use);
 208 }
 209
 210 static int hns_nic_maybe_stop_tx(
 211         struct sk_buff **out_skb, int *bnum, struct hnae_ring *ring)
 212 {
 213         struct sk_buff *skb = *out_skb;
 214         struct sk_buff *new_skb = NULL;
 215         int buf_num;
 216
 217         /* no. of segments (plus a header) */
 218         buf_num = skb_shinfo(skb)->nr_frags + 1;
 219
 220         if (unlikely(buf_num > ring->max_desc_num_per_pkt)) {
 221                 if (ring_space(ring) < 1)
 222                         return -EBUSY;
 223
 224                 new_skb = skb_copy(skb, GFP_ATOMIC);
 225                 if (!new_skb)
 226                         return -ENOMEM;
 227
 228                 dev_kfree_skb_any(skb);
 229                 *out_skb = new_skb;
 230                 buf_num = 1;
 231         } else if (buf_num > ring_space(ring)) {
 232                 return -EBUSY;
 233         }
 234
 235         *bnum = buf_num;
 236         return 0;
 237 }
 238
 239 static int hns_nic_maybe_stop_tso(
 240         struct sk_buff **out_skb, int *bnum, struct hnae_ring *ring)
 241 {
 242         int i;
 243         int size;
 244         int buf_num;
 245         int frag_num;
 246         struct sk_buff *skb = *out_skb;
 247         struct sk_buff *new_skb = NULL;
 248         skb_frag_t *frag;
 249
 250         size = skb_headlen(skb);
 251         buf_num = (size + BD_MAX_SEND_SIZE - 1) / BD_MAX_SEND_SIZE;
 252
 253         frag_num = skb_shinfo(skb)->nr_frags;
 254         for (i = 0; i < frag_num; i++) {
 255                 frag = &skb_shinfo(skb)->frags[i];
 256                 size = skb_frag_size(frag);
 257                 buf_num += (size + BD_MAX_SEND_SIZE - 1) / BD_MAX_SEND_SIZE;
 258         }
 259
 260         if (unlikely(buf_num > ring->max_desc_num_per_pkt)) {
 261                 buf_num = (skb->len + BD_MAX_SEND_SIZE - 1) / BD_MAX_SEND_SIZE;
 262                 if (ring_space(ring) < buf_num)
 263                         return -EBUSY;
 264                 /* manual split the send packet */
 265                 new_skb = skb_copy(skb, GFP_ATOMIC);
 266                 if (!new_skb)
 267                         return -ENOMEM;
 268                 dev_kfree_skb_any(skb);
 269                 *out_skb = new_skb;
 270
 271         } else if (ring_space(ring) < buf_num) {
 272                 return -EBUSY;
 273         }
 274
 275         *bnum = buf_num;
 276         return 0;
 277 }
 278
 279 static void fill_tso_desc(struct hnae_ring *ring, void *priv,
 280                           int size, dma_addr_t dma, int frag_end,
 281                           int buf_num, enum hns_desc_type type, int mtu)
 282 {
 283         int frag_buf_num;
 284         int sizeoflast;
 285         int k;
 286
 287         frag_buf_num = (size + BD_MAX_SEND_SIZE - 1) / BD_MAX_SEND_SIZE;
 288         sizeoflast = size % BD_MAX_SEND_SIZE;
 289         sizeoflast = sizeoflast ? sizeoflast : BD_MAX_SEND_SIZE;
 290
 291         /* when the frag size is bigger than hardware, split this frag */
 292         for (k = 0; k < frag_buf_num; k++)
 293                 fill_v2_desc_hw(ring, priv, k == 0 ? size : 0,
 294                                 (k == frag_buf_num - 1) ?
 295                                         sizeoflast : BD_MAX_SEND_SIZE,
 296                                 dma + BD_MAX_SEND_SIZE * k,
 297                                 frag_end && (k == frag_buf_num - 1) ? 1 : 0,
 298                                 buf_num,
 299                                 (type == DESC_TYPE_SKB && !k) ?
 300                                         DESC_TYPE_SKB : DESC_TYPE_PAGE,
 301                                 mtu);
 302 }
 303
 304 netdev_tx_t hns_nic_net_xmit_hw(struct net_device *ndev,
 305                                 struct sk_buff *skb,
 306                                 struct hns_nic_ring_data *ring_data)
 307 {
 308         struct hns_nic_priv *priv = netdev_priv(ndev);
 309         struct hnae_ring *ring = ring_data->ring;
 310         struct device *dev = ring_to_dev(ring);
 311         struct netdev_queue *dev_queue;
 312         skb_frag_t *frag;
 313         int buf_num;
 314         int seg_num;
 315         dma_addr_t dma;
 316         int size, next_to_use;
 317         int i;
 318
 319         switch (priv->ops.maybe_stop_tx(&skb, &buf_num, ring)) {
 320         case -EBUSY:
 321                 ring->stats.tx_busy++;
 322                 goto out_net_tx_busy;
 323         case -ENOMEM:
 324                 ring->stats.sw_err_cnt++;
 325                 netdev_err(ndev, "no memory to xmit!\n");
 326                 goto out_err_tx_ok;
 327         default:
 328                 break;
 329         }
 330
 331         /* no. of segments (plus a header) */
 332         seg_num = skb_shinfo(skb)->nr_frags + 1;
 333         next_to_use = ring->next_to_use;
 334
 335         /* fill the first part */
 336         size = skb_headlen(skb);
 337         dma = dma_map_single(dev, skb->data, size, DMA_TO_DEVICE);
 338         if (dma_mapping_error(dev, dma)) {
 339                 netdev_err(ndev, "TX head DMA map failed\n");
 340                 ring->stats.sw_err_cnt++;
 341                 goto out_err_tx_ok;
 342         }
 343         priv->ops.fill_desc(ring, skb, size, dma, seg_num == 1 ? 1 : 0,
 344                             buf_num, DESC_TYPE_SKB, ndev->mtu);
 345
 346         /* fill the fragments */
 347         for (i = 1; i < seg_num; i++) {
 348                 frag = &skb_shinfo(skb)->frags[i - 1];
 349                 size = skb_frag_size(frag);
 350                 dma = skb_frag_dma_map(dev, frag, 0, size, DMA_TO_DEVICE);
 351                 if (dma_mapping_error(dev, dma)) {
 352                         netdev_err(ndev, "TX frag(%d) DMA map failed\n", i);
 353                         ring->stats.sw_err_cnt++;
 354                         goto out_map_frag_fail;
 355                 }
 356                 priv->ops.fill_desc(ring, skb_frag_page(frag), size, dma,
 357                                     seg_num - 1 == i ? 1 : 0, buf_num,
 358                                     DESC_TYPE_PAGE, ndev->mtu);
 359         }
 360
 361         /*complete translate all packets*/
 362         dev_queue = netdev_get_tx_queue(ndev, skb->queue_mapping);
 363         netdev_tx_sent_queue(dev_queue, skb->len);
 364
 365         netif_trans_update(ndev);
 366         ndev->stats.tx_bytes += skb->len;
 367         ndev->stats.tx_packets++;
 368
 369         wmb(); /* commit all data before submit */
 370         assert(skb->queue_mapping < priv->ae_handle->q_num);
 371         hnae_queue_xmit(priv->ae_handle->qs[skb->queue_mapping], buf_num);
 372
 373         return NETDEV_TX_OK;
 374
 375 out_map_frag_fail:
 376
 377         while (ring->next_to_use != next_to_use) {
 378                 unfill_desc(ring);
 379                 if (ring->next_to_use != next_to_use)
 380                         dma_unmap_page(dev,
 381                                        ring->desc_cb[ring->next_to_use].dma,
 382                                        ring->desc_cb[ring->next_to_use].length,
 383                                        DMA_TO_DEVICE);
 384                 else
 385                         dma_unmap_single(dev,
 386                                          ring->desc_cb[next_to_use].dma,
 387                                          ring->desc_cb[next_to_use].length,
 388                                          DMA_TO_DEVICE);
 389         }
 390
 391 out_err_tx_ok:
 392
 393         dev_kfree_skb_any(skb);
 394         return NETDEV_TX_OK;
 395
 396 out_net_tx_busy:
 397
 398         netif_stop_subqueue(ndev, skb->queue_mapping);
 399
 400         /* Herbert's original patch had:
 401          *  smp_mb__after_netif_stop_queue();
 402          * but since that doesn't exist yet, just open code it.
 403          */
 404         smp_mb();
 405         return NETDEV_TX_BUSY;
 406 }
 407
 408 static void hns_nic_reuse_page(struct sk_buff *skb, int i,
 409                                struct hnae_ring *ring, int pull_len,
 410                                struct hnae_desc_cb *desc_cb)
 411 {
 412         struct hnae_desc *desc;
 413         u32 truesize;
 414         int size;
 415         int last_offset;
 416         bool twobufs;
 417
 418         twobufs = ((PAGE_SIZE < 8192) &&
 419                 hnae_buf_size(ring) == HNS_BUFFER_SIZE_2048);
 420
 421         desc = &ring->desc[ring->next_to_clean];
 422         size = le16_to_cpu(desc->rx.size);
 423
 424         if (twobufs) {
 425                 truesize = hnae_buf_size(ring);
 426         } else {
 427                 truesize = ALIGN(size, L1_CACHE_BYTES);
 428                 last_offset = hnae_page_size(ring) - hnae_buf_size(ring);
 429         }
 430
 431         skb_add_rx_frag(skb, i, desc_cb->priv, desc_cb->page_offset + pull_len,
 432                         size - pull_len, truesize);
 433
 434          /* avoid re-using remote pages,flag default unreuse */
 435         if (unlikely(page_to_nid(desc_cb->priv) != numa_node_id()))
 436                 return;
 437
 438         if (twobufs) {
 439                 /* if we are only owner of page we can reuse it */
 440                 if (likely(page_count(desc_cb->priv) == 1)) {
 441                         /* flip page offset to other buffer */
 442                         desc_cb->page_offset ^= truesize;
 443
 444                         desc_cb->reuse_flag = 1;
 445                         /* bump ref count on page before it is given*/
 446                         get_page(desc_cb->priv);
 447                 }
 448                 return;
 449         }
 450
 451         /* move offset up to the next cache line */
 452         desc_cb->page_offset += truesize;
 453
 454         if (desc_cb->page_offset <= last_offset) {
 455                 desc_cb->reuse_flag = 1;
 456                 /* bump ref count on page before it is given*/
 457                 get_page(desc_cb->priv);
 458         }
 459 }
 460
 461 static void get_v2rx_desc_bnum(u32 bnum_flag, int *out_bnum)
 462 {
 463         *out_bnum = hnae_get_field(bnum_flag,
 464                                    HNS_RXD_BUFNUM_M, HNS_RXD_BUFNUM_S) + 1;
 465 }
 466
 467 static void get_rx_desc_bnum(u32 bnum_flag, int *out_bnum)
 468 {
 469         *out_bnum = hnae_get_field(bnum_flag,
 470                                    HNS_RXD_BUFNUM_M, HNS_RXD_BUFNUM_S);
 471 }
 472
 473 static void hns_nic_rx_checksum(struct hns_nic_ring_data *ring_data,
 474                                 struct sk_buff *skb, u32 flag)
 475 {
 476         struct net_device *netdev = ring_data->napi.dev;
 477         u32 l3id;
 478         u32 l4id;
 479
 480         /* check if RX checksum offload is enabled */
 481         if (unlikely(!(netdev->features & NETIF_F_RXCSUM)))
 482                 return;
 483
 484         /* In hardware, we only support checksum for the following protocols:
 485          * 1) IPv4,
 486          * 2) TCP(over IPv4 or IPv6),
 487          * 3) UDP(over IPv4 or IPv6),
 488          * 4) SCTP(over IPv4 or IPv6)
 489          * but we support many L3(IPv4, IPv6, MPLS, PPPoE etc) and L4(TCP,
 490          * UDP, GRE, SCTP, IGMP, ICMP etc.) protocols.
 491          *
 492          * Hardware limitation:
 493          * Our present hardware RX Descriptor lacks L3/L4 checksum "Status &
 494          * Error" bit (which usually can be used to indicate whether checksum
 495          * was calculated by the hardware and if there was any error encountered
 496          * during checksum calculation).
 497          *
 498          * Software workaround:
 499          * We do get info within the RX descriptor about the kind of L3/L4
 500          * protocol coming in the packet and the error status. These errors
 501          * might not just be checksum errors but could be related to version,
 502          * length of IPv4, UDP, TCP etc.
 503          * Because there is no-way of knowing if it is a L3/L4 error due to bad
 504          * checksum or any other L3/L4 error, we will not (cannot) convey
 505          * checksum status for such cases to upper stack and will not maintain
 506          * the RX L3/L4 checksum counters as well.
 507          */
 508
 509         l3id = hnae_get_field(flag, HNS_RXD_L3ID_M, HNS_RXD_L3ID_S);
 510         l4id = hnae_get_field(flag, HNS_RXD_L4ID_M, HNS_RXD_L4ID_S);
 511
 512         /*  check L3 protocol for which checksum is supported */
 513         if ((l3id != HNS_RX_FLAG_L3ID_IPV4) && (l3id != HNS_RX_FLAG_L3ID_IPV6))
 514                 return;
 515
 516         /* check for any(not just checksum)flagged L3 protocol errors */
 517         if (unlikely(hnae_get_bit(flag, HNS_RXD_L3E_B)))
 518                 return;
 519
 520         /* we do not support checksum of fragmented packets */
 521         if (unlikely(hnae_get_bit(flag, HNS_RXD_FRAG_B)))
 522                 return;
 523
 524         /*  check L4 protocol for which checksum is supported */
 525         if ((l4id != HNS_RX_FLAG_L4ID_TCP) &&
 526             (l4id != HNS_RX_FLAG_L4ID_UDP) &&
 527             (l4id != HNS_RX_FLAG_L4ID_SCTP))
 528                 return;
 529
 530         /* check for any(not just checksum)flagged L4 protocol errors */
 531         if (unlikely(hnae_get_bit(flag, HNS_RXD_L4E_B)))
 532                 return;
 533
 534         /* now, this has to be a packet with valid RX checksum */
 535         skb->ip_summed = CHECKSUM_UNNECESSARY;
 536 }
 537
 538 static int hns_nic_poll_rx_skb(struct hns_nic_ring_data *ring_data,
 539                                struct sk_buff **out_skb, int *out_bnum)
 540 {
 541         struct hnae_ring *ring = ring_data->ring;
 542         struct net_device *ndev = ring_data->napi.dev;
 543         struct hns_nic_priv *priv = netdev_priv(ndev);
 544         struct sk_buff *skb;
 545         struct hnae_desc *desc;
 546         struct hnae_desc_cb *desc_cb;
 547         unsigned char *va;
 548         int bnum, length, i;
 549         int pull_len;
 550         u32 bnum_flag;
 551
 552         desc = &ring->desc[ring->next_to_clean];
 553         desc_cb = &ring->desc_cb[ring->next_to_clean];
 554
 555         prefetch(desc);
 556
 557         va = (unsigned char *)desc_cb->buf + desc_cb->page_offset;
 558
 559         /* prefetch first cache line of first page */
 560         prefetch(va);
 561 #if L1_CACHE_BYTES < 128
 562         prefetch(va + L1_CACHE_BYTES);
 563 #endif
 564
 565         skb = *out_skb = napi_alloc_skb(&ring_data->napi,
 566                                         HNS_RX_HEAD_SIZE);
 567         if (unlikely(!skb)) {
 568                 netdev_err(ndev, "alloc rx skb fail\n");
 569                 ring->stats.sw_err_cnt++;
 570                 return -ENOMEM;
 571         }
 572
 573         prefetchw(skb->data);
 574         length = le16_to_cpu(desc->rx.pkt_len);
 575         bnum_flag = le32_to_cpu(desc->rx.ipoff_bnum_pid_flag);
 576         priv->ops.get_rxd_bnum(bnum_flag, &bnum);
 577         *out_bnum = bnum;
 578
 579         if (length <= HNS_RX_HEAD_SIZE) {
 580                 memcpy(__skb_put(skb, length), va, ALIGN(length, sizeof(long)));
 581
 582                 /* we can reuse buffer as-is, just make sure it is local */
 583                 if (likely(page_to_nid(desc_cb->priv) == numa_node_id()))
 584                         desc_cb->reuse_flag = 1;
 585                 else /* this page cannot be reused so discard it */
 586                         put_page(desc_cb->priv);
 587
 588                 ring_ptr_move_fw(ring, next_to_clean);
 589
 590                 if (unlikely(bnum != 1)) { /* check err*/
 591                         *out_bnum = 1;
 592                         goto out_bnum_err;
 593                 }
 594         } else {
 595                 ring->stats.seg_pkt_cnt++;
 596
 597                 pull_len = eth_get_headlen(ndev, va, HNS_RX_HEAD_SIZE);
 598                 memcpy(__skb_put(skb, pull_len), va,
 599                        ALIGN(pull_len, sizeof(long)));
 600
 601                 hns_nic_reuse_page(skb, 0, ring, pull_len, desc_cb);
 602                 ring_ptr_move_fw(ring, next_to_clean);
 603
 604                 if (unlikely(bnum >= (int)MAX_SKB_FRAGS)) { /* check err*/
 605                         *out_bnum = 1;
 606                         goto out_bnum_err;
 607                 }
 608                 for (i = 1; i < bnum; i++) {
 609                         desc = &ring->desc[ring->next_to_clean];
 610                         desc_cb = &ring->desc_cb[ring->next_to_clean];
 611
 612                         hns_nic_reuse_page(skb, i, ring, 0, desc_cb);
 613                         ring_ptr_move_fw(ring, next_to_clean);
 614                 }
 615         }
 616
 617         /* check except process, free skb and jump the desc */
 618         if (unlikely((!bnum) || (bnum > ring->max_desc_num_per_pkt))) {
 619 out_bnum_err:
 620                 *out_bnum = *out_bnum ? *out_bnum : 1; /* ntc moved,cannot 0*/
 621                 netdev_err(ndev, "invalid bnum(%d,%d,%d,%d),%016llx,%016llx\n",
 622                            bnum, ring->max_desc_num_per_pkt,
 623                            length, (int)MAX_SKB_FRAGS,
 624                            ((u64 *)desc)[0], ((u64 *)desc)[1]);
 625                 ring->stats.err_bd_num++;
 626                 dev_kfree_skb_any(skb);
 627                 return -EDOM;
 628         }
 629
 630         bnum_flag = le32_to_cpu(desc->rx.ipoff_bnum_pid_flag);
 631
 632         if (unlikely(!hnae_get_bit(bnum_flag, HNS_RXD_VLD_B))) {
 633                 netdev_err(ndev, "no valid bd,%016llx,%016llx\n",
 634                            ((u64 *)desc)[0], ((u64 *)desc)[1]);
 635                 ring->stats.non_vld_descs++;
 636                 dev_kfree_skb_any(skb);
 637                 return -EINVAL;
 638         }
 639
 640         if (unlikely((!desc->rx.pkt_len) ||
 641                      hnae_get_bit(bnum_flag, HNS_RXD_DROP_B))) {
 642                 ring->stats.err_pkt_len++;
 643                 dev_kfree_skb_any(skb);
 644                 return -EFAULT;
 645         }
 646
 647         if (unlikely(hnae_get_bit(bnum_flag, HNS_RXD_L2E_B))) {
 648                 ring->stats.l2_err++;
 649                 dev_kfree_skb_any(skb);
 650                 return -EFAULT;
 651         }
 652
 653         ring->stats.rx_pkts++;
 654         ring->stats.rx_bytes += skb->len;
 655
 656         /* indicate to upper stack if our hardware has already calculated
 657          * the RX checksum
 658          */
 659         hns_nic_rx_checksum(ring_data, skb, bnum_flag);
 660
 661         return 0;
 662 }
 663
 664 static void
 665 hns_nic_alloc_rx_buffers(struct hns_nic_ring_data *ring_data, int cleand_count)
 666 {
 667         int i, ret;
 668         struct hnae_desc_cb res_cbs;
 669         struct hnae_desc_cb *desc_cb;
 670         struct hnae_ring *ring = ring_data->ring;
 671         struct net_device *ndev = ring_data->napi.dev;
 672
 673         for (i = 0; i < cleand_count; i++) {
 674                 desc_cb = &ring->desc_cb[ring->next_to_use];
 675                 if (desc_cb->reuse_flag) {
 676                         ring->stats.reuse_pg_cnt++;
 677                         hnae_reuse_buffer(ring, ring->next_to_use);
 678                 } else {
 679                         ret = hnae_reserve_buffer_map(ring, &res_cbs);
 680                         if (ret) {
 681                                 ring->stats.sw_err_cnt++;
 682                                 netdev_err(ndev, "hnae reserve buffer map failed.\n");
 683                                 break;
 684                         }
 685                         hnae_replace_buffer(ring, ring->next_to_use, &res_cbs);
 686                 }
 687
 688                 ring_ptr_move_fw(ring, next_to_use);
 689         }
 690
 691         wmb(); /* make all data has been write before submit */
 692         writel_relaxed(i, ring->io_base + RCB_REG_HEAD);
 693 }
 694
 695 /* return error number for error or number of desc left to take
 696  */
 697 static void hns_nic_rx_up_pro(struct hns_nic_ring_data *ring_data,
 698                               struct sk_buff *skb)
 699 {
 700         struct net_device *ndev = ring_data->napi.dev;
 701
 702         skb->protocol = eth_type_trans(skb, ndev);
 703         (void)napi_gro_receive(&ring_data->napi, skb);
 704 }
 705
 706 static int hns_desc_unused(struct hnae_ring *ring)
 707 {
 708         int ntc = ring->next_to_clean;
 709         int ntu = ring->next_to_use;
 710
 711         return ((ntc >= ntu) ? 0 : ring->desc_num) + ntc - ntu;
 712 }
 713
 714 #define HNS_LOWEST_LATENCY_RATE         27      /* 27 MB/s */
 715 #define HNS_LOW_LATENCY_RATE                    80      /* 80 MB/s */
 716
 717 #define HNS_COAL_BDNUM                  3
 718
 719 static u32 hns_coal_rx_bdnum(struct hnae_ring *ring)
 720 {
 721         bool coal_enable = ring->q->handle->coal_adapt_en;
 722
 723         if (coal_enable &&
 724             ring->coal_last_rx_bytes > HNS_LOWEST_LATENCY_RATE)
 725                 return HNS_COAL_BDNUM;
 726         else
 727                 return 0;
 728 }
 729
 730 static void hns_update_rx_rate(struct hnae_ring *ring)
 731 {
 732         bool coal_enable = ring->q->handle->coal_adapt_en;
 733         u32 time_passed_ms;
 734         u64 total_bytes;
 735
 736         if (!coal_enable ||
 737             time_before(jiffies, ring->coal_last_jiffies + (HZ >> 4)))
 738                 return;
 739
 740         /* ring->stats.rx_bytes overflowed */
 741         if (ring->coal_last_rx_bytes > ring->stats.rx_bytes) {
 742                 ring->coal_last_rx_bytes = ring->stats.rx_bytes;
 743                 ring->coal_last_jiffies = jiffies;
 744                 return;
 745         }
 746
 747         total_bytes = ring->stats.rx_bytes - ring->coal_last_rx_bytes;
 748         time_passed_ms = jiffies_to_msecs(jiffies - ring->coal_last_jiffies);
 749         do_div(total_bytes, time_passed_ms);
 750         ring->coal_rx_rate = total_bytes >> 10;
 751
 752         ring->coal_last_rx_bytes = ring->stats.rx_bytes;
 753         ring->coal_last_jiffies = jiffies;
 754 }
 755
 756 /**
 757  * smooth_alg - smoothing algrithm for adjusting coalesce parameter
 758  **/
 759 static u32 smooth_alg(u32 new_param, u32 old_param)
 760 {
 761         u32 gap = (new_param > old_param) ? new_param - old_param
 762                                           : old_param - new_param;
 763
 764         if (gap > 8)
 765                 gap >>= 3;
 766
 767         if (new_param > old_param)
 768                 return old_param + gap;
 769         else
 770                 return old_param - gap;
 771 }
 772
 773 /**
 774  * hns_nic_adp_coalesce - self adapte coalesce according to rx rate
 775  * @ring_data: pointer to hns_nic_ring_data
 776  **/
 777 static void hns_nic_adpt_coalesce(struct hns_nic_ring_data *ring_data)
 778 {
 779         struct hnae_ring *ring = ring_data->ring;
 780         struct hnae_handle *handle = ring->q->handle;
 781         u32 new_coal_param, old_coal_param = ring->coal_param;
 782
 783         if (ring->coal_rx_rate < HNS_LOWEST_LATENCY_RATE)
 784                 new_coal_param = HNAE_LOWEST_LATENCY_COAL_PARAM;
 785         else if (ring->coal_rx_rate < HNS_LOW_LATENCY_RATE)
 786                 new_coal_param = HNAE_LOW_LATENCY_COAL_PARAM;
 787         else
 788                 new_coal_param = HNAE_BULK_LATENCY_COAL_PARAM;
 789
 790         if (new_coal_param == old_coal_param &&
 791             new_coal_param == handle->coal_param)
 792                 return;
 793
 794         new_coal_param = smooth_alg(new_coal_param, old_coal_param);
 795         ring->coal_param = new_coal_param;
 796
 797         /**
 798          * Because all ring in one port has one coalesce param, when one ring
 799          * calculate its own coalesce param, it cannot write to hardware at
 800          * once. There are three conditions as follows:
 801          *       1. current ring's coalesce param is larger than the hardware.
 802          *       2. or ring which adapt last time can change again.
 803          *       3. timeout.
 804          */
 805         if (new_coal_param == handle->coal_param) {
 806                 handle->coal_last_jiffies = jiffies;
 807                 handle->coal_ring_idx = ring_data->queue_index;
 808         } else if (new_coal_param > handle->coal_param ||
 809                    handle->coal_ring_idx == ring_data->queue_index ||
 810                    time_after(jiffies, handle->coal_last_jiffies + (HZ >> 4))) {
 811                 handle->dev->ops->set_coalesce_usecs(handle,
 812                                         new_coal_param);
 813                 handle->dev->ops->set_coalesce_frames(handle,
 814                                         1, new_coal_param);
 815                 handle->coal_param = new_coal_param;
 816                 handle->coal_ring_idx = ring_data->queue_index;
 817                 handle->coal_last_jiffies = jiffies;
 818         }
 819 }
 820
 821 static int hns_nic_rx_poll_one(struct hns_nic_ring_data *ring_data,
 822                                int budget, void *v)
 823 {
 824         struct hnae_ring *ring = ring_data->ring;
 825         struct sk_buff *skb;
 826         int num, bnum;
 827 #define RCB_NOF_ALLOC_RX_BUFF_ONCE 16
 828         int recv_pkts, recv_bds, clean_count, err;
 829         int unused_count = hns_desc_unused(ring);
 830
 831         num = readl_relaxed(ring->io_base + RCB_REG_FBDNUM);
 832         rmb(); /* make sure num taken effect before the other data is touched */
 833
 834         recv_pkts = 0, recv_bds = 0, clean_count = 0;
 835         num -= unused_count;
 836
 837         while (recv_pkts < budget && recv_bds < num) {
 838                 /* reuse or realloc buffers */
 839                 if (clean_count + unused_count >= RCB_NOF_ALLOC_RX_BUFF_ONCE) {
 840                         hns_nic_alloc_rx_buffers(ring_data,
 841                                                  clean_count + unused_count);
 842                         clean_count = 0;
 843                         unused_count = hns_desc_unused(ring);
 844                 }
 845
 846                 /* poll one pkt */
 847                 err = hns_nic_poll_rx_skb(ring_data, &skb, &bnum);
 848                 if (unlikely(!skb)) /* this fault cannot be repaired */
 849                         goto out;
 850
 851                 recv_bds += bnum;
 852                 clean_count += bnum;
 853                 if (unlikely(err)) {  /* do jump the err */
 854                         recv_pkts++;
 855                         continue;
 856                 }
 857
 858                 /* do update ip stack process*/
 859                 ((void (*)(struct hns_nic_ring_data *, struct sk_buff *))v)(
 860                                                         ring_data, skb);
 861                 recv_pkts++;
 862         }
 863
 864 out:
 865         /* make all data has been write before submit */
 866         if (clean_count + unused_count > 0)
 867                 hns_nic_alloc_rx_buffers(ring_data,
 868                                          clean_count + unused_count);
 869
 870         return recv_pkts;
 871 }
 872
 873 static bool hns_nic_rx_fini_pro(struct hns_nic_ring_data *ring_data)
 874 {
 875         struct hnae_ring *ring = ring_data->ring;
 876         int num = 0;
 877         bool rx_stopped;
 878
 879         hns_update_rx_rate(ring);
 880
 881         /* for hardware bug fixed */
 882         ring_data->ring->q->handle->dev->ops->toggle_ring_irq(ring, 0);
 883         num = readl_relaxed(ring->io_base + RCB_REG_FBDNUM);
 884
 885         if (num <= hns_coal_rx_bdnum(ring)) {
 886                 if (ring->q->handle->coal_adapt_en)
 887                         hns_nic_adpt_coalesce(ring_data);
 888
 889                 rx_stopped = true;
 890         } else {
 891                 ring_data->ring->q->handle->dev->ops->toggle_ring_irq(
 892                         ring_data->ring, 1);
 893
 894                 rx_stopped = false;
 895         }
 896
 897         return rx_stopped;
 898 }
 899
 900 static bool hns_nic_rx_fini_pro_v2(struct hns_nic_ring_data *ring_data)
 901 {
 902         struct hnae_ring *ring = ring_data->ring;
 903         int num;
 904
 905         hns_update_rx_rate(ring);
 906         num = readl_relaxed(ring->io_base + RCB_REG_FBDNUM);
 907
 908         if (num <= hns_coal_rx_bdnum(ring)) {
 909                 if (ring->q->handle->coal_adapt_en)
 910                         hns_nic_adpt_coalesce(ring_data);
 911
 912                 return true;
 913         }
 914
 915         return false;
 916 }
 917
 918 static inline void hns_nic_reclaim_one_desc(struct hnae_ring *ring,
 919                                             int *bytes, int *pkts)
 920 {
 921         struct hnae_desc_cb *desc_cb = &ring->desc_cb[ring->next_to_clean];
 922
 923         (*pkts) += (desc_cb->type == DESC_TYPE_SKB);
 924         (*bytes) += desc_cb->length;
 925         /* desc_cb will be cleaned, after hnae_free_buffer_detach*/
 926         hnae_free_buffer_detach(ring, ring->next_to_clean);
 927
 928         ring_ptr_move_fw(ring, next_to_clean);
 929 }
 930
 931 static int is_valid_clean_head(struct hnae_ring *ring, int h)
 932 {
 933         int u = ring->next_to_use;
 934         int c = ring->next_to_clean;
 935
 936         if (unlikely(h > ring->desc_num))
 937                 return 0;
 938
 939         assert(u > 0 && u < ring->desc_num);
 940         assert(c > 0 && c < ring->desc_num);
 941         assert(u != c && h != c); /* must be checked before call this func */
 942
 943         return u > c ? (h > c && h <= u) : (h > c || h <= u);
 944 }
 945
 946 /* netif_tx_lock will turn down the performance, set only when necessary */
 947 #ifdef CONFIG_NET_POLL_CONTROLLER
 948 #define NETIF_TX_LOCK(ring) spin_lock(&(ring)->lock)
 949 #define NETIF_TX_UNLOCK(ring) spin_unlock(&(ring)->lock)
 950 #else
 951 #define NETIF_TX_LOCK(ring)
 952 #define NETIF_TX_UNLOCK(ring)
 953 #endif
 954
 955 /* reclaim all desc in one budget
 956  * return error or number of desc left
 957  */
 958 static int hns_nic_tx_poll_one(struct hns_nic_ring_data *ring_data,
 959                                int budget, void *v)
 960 {
 961         struct hnae_ring *ring = ring_data->ring;
 962         struct net_device *ndev = ring_data->napi.dev;
 963         struct netdev_queue *dev_queue;
 964         struct hns_nic_priv *priv = netdev_priv(ndev);
 965         int head;
 966         int bytes, pkts;
 967
 968         NETIF_TX_LOCK(ring);
 969
 970         head = readl_relaxed(ring->io_base + RCB_REG_HEAD);
 971         rmb(); /* make sure head is ready before touch any data */
 972
 973         if (is_ring_empty(ring) || head == ring->next_to_clean) {
 974                 NETIF_TX_UNLOCK(ring);
 975                 return 0; /* no data to poll */
 976         }
 977
 978         if (!is_valid_clean_head(ring, head)) {
 979                 netdev_err(ndev, "wrong head (%d, %d-%d)\n", head,
 980                            ring->next_to_use, ring->next_to_clean);
 981                 ring->stats.io_err_cnt++;
 982                 NETIF_TX_UNLOCK(ring);
 983                 return -EIO;
 984         }
 985
 986         bytes = 0;
 987         pkts = 0;
 988         while (head != ring->next_to_clean) {
 989                 hns_nic_reclaim_one_desc(ring, &bytes, &pkts);
 990                 /* issue prefetch for next Tx descriptor */
 991                 prefetch(&ring->desc_cb[ring->next_to_clean]);
 992         }
 993         /* update tx ring statistics. */
 994         ring->stats.tx_pkts += pkts;
 995         ring->stats.tx_bytes += bytes;
 996
 997         NETIF_TX_UNLOCK(ring);
 998
 999         dev_queue = netdev_get_tx_queue(ndev, ring_data->queue_index);
1000         netdev_tx_completed_queue(dev_queue, pkts, bytes);
1001
1002         if (unlikely(priv->link && !netif_carrier_ok(ndev)))
1003                 netif_carrier_on(ndev);
1004
1005         if (unlikely(pkts && netif_carrier_ok(ndev) &&
1006                      (ring_space(ring) >= ring->max_desc_num_per_pkt * 2))) {
1007                 /* Make sure that anybody stopping the queue after this
1008                  * sees the new next_to_clean.
1009                  */
1010                 smp_mb();
1011                 if (netif_tx_queue_stopped(dev_queue) &&
1012                     !test_bit(NIC_STATE_DOWN, &priv->state)) {
1013                         netif_tx_wake_queue(dev_queue);
1014                         ring->stats.restart_queue++;
1015                 }
1016         }
1017         return 0;
1018 }
1019
1020 static bool hns_nic_tx_fini_pro(struct hns_nic_ring_data *ring_data)
1021 {
1022         struct hnae_ring *ring = ring_data->ring;
1023         int head;
1024
1025         ring_data->ring->q->handle->dev->ops->toggle_ring_irq(ring, 0);
1026
1027         head = readl_relaxed(ring->io_base + RCB_REG_HEAD);
1028
1029         if (head != ring->next_to_clean) {
1030                 ring_data->ring->q->handle->dev->ops->toggle_ring_irq(
1031                         ring_data->ring, 1);
1032
1033                 return false;
1034         } else {
1035                 return true;
1036         }
1037 }
1038
1039 static bool hns_nic_tx_fini_pro_v2(struct hns_nic_ring_data *ring_data)
1040 {
1041         struct hnae_ring *ring = ring_data->ring;
1042         int head = readl_relaxed(ring->io_base + RCB_REG_HEAD);
1043
1044         if (head == ring->next_to_clean)
1045                 return true;
1046         else
1047                 return false;
1048 }
1049
1050 static void hns_nic_tx_clr_all_bufs(struct hns_nic_ring_data *ring_data)
1051 {
1052         struct hnae_ring *ring = ring_data->ring;
1053         struct net_device *ndev = ring_data->napi.dev;
1054         struct netdev_queue *dev_queue;
1055         int head;
1056         int bytes, pkts;
1057
1058         NETIF_TX_LOCK(ring);
1059
1060         head = ring->next_to_use; /* ntu :soft setted ring position*/
1061         bytes = 0;
1062         pkts = 0;
1063         while (head != ring->next_to_clean)
1064                 hns_nic_reclaim_one_desc(ring, &bytes, &pkts);
1065
1066         NETIF_TX_UNLOCK(ring);
1067
1068         dev_queue = netdev_get_tx_queue(ndev, ring_data->queue_index);
1069         netdev_tx_reset_queue(dev_queue);
1070 }
1071
1072 static int hns_nic_common_poll(struct napi_struct *napi, int budget)
1073 {
1074         int clean_complete = 0;
1075         struct hns_nic_ring_data *ring_data =
1076                 container_of(napi, struct hns_nic_ring_data, napi);
1077         struct hnae_ring *ring = ring_data->ring;
1078
1079 try_again:
1080         clean_complete += ring_data->poll_one(
1081                                 ring_data, budget - clean_complete,
1082                                 ring_data->ex_process);
1083
1084         if (clean_complete < budget) {
1085                 if (ring_data->fini_process(ring_data)) {
1086                         napi_complete(napi);
1087                         ring->q->handle->dev->ops->toggle_ring_irq(ring, 0);
1088                 } else {
1089                         goto try_again;
1090                 }
1091         }
1092
1093         return clean_complete;
1094 }
1095
1096 static irqreturn_t hns_irq_handle(int irq, void *dev)
1097 {
1098         struct hns_nic_ring_data *ring_data = (struct hns_nic_ring_data *)dev;
1099
1100         ring_data->ring->q->handle->dev->ops->toggle_ring_irq(
1101                 ring_data->ring, 1);
1102         napi_schedule(&ring_data->napi);
1103
1104         return IRQ_HANDLED;
1105 }
1106
1107 /**
1108  *hns_nic_adjust_link - adjust net work mode by the phy stat or new param
1109  *@ndev: net device
1110  */
1111 static void hns_nic_adjust_link(struct net_device *ndev)
1112 {
1113         struct hns_nic_priv *priv = netdev_priv(ndev);
1114         struct hnae_handle *h = priv->ae_handle;
1115         int state = 1;
1116
1117         /* If there is no phy, do not need adjust link */
1118         if (ndev->phydev) {
1119                 /* When phy link down, do nothing */
1120                 if (ndev->phydev->link == 0)
1121                         return;
1122
1123                 if (h->dev->ops->need_adjust_link(h, ndev->phydev->speed,
1124                                                   ndev->phydev->duplex)) {
1125                         /* because Hi161X chip don't support to change gmac
1126                          * speed and duplex with traffic. Delay 200ms to
1127                          * make sure there is no more data in chip FIFO.
1128                          */
1129                         netif_carrier_off(ndev);
1130                         msleep(200);
1131                         h->dev->ops->adjust_link(h, ndev->phydev->speed,
1132                                                  ndev->phydev->duplex);
1133                         netif_carrier_on(ndev);
1134                 }
1135         }
1136
1137         state = state && h->dev->ops->get_status(h);
1138
1139         if (state != priv->link) {
1140                 if (state) {
1141                         netif_carrier_on(ndev);
1142                         netif_tx_wake_all_queues(ndev);
1143                         netdev_info(ndev, "link up\n");
1144                 } else {
1145                         netif_carrier_off(ndev);
1146                         netdev_info(ndev, "link down\n");
1147                 }
1148                 priv->link = state;
1149         }
1150 }
1151
1152 /**
1153  *hns_nic_init_phy - init phy
1154  *@ndev: net device
1155  *@h: ae handle
1156  * Return 0 on success, negative on failure
1157  */
1158 int hns_nic_init_phy(struct net_device *ndev, struct hnae_handle *h)
1159 {
1160         __ETHTOOL_DECLARE_LINK_MODE_MASK(supported) = { 0, };
1161         struct phy_device *phy_dev = h->phy_dev;
1162         int ret;
1163
1164         if (!h->phy_dev)
1165                 return 0;
1166
1167         ethtool_convert_legacy_u32_to_link_mode(supported, h->if_support);
1168         linkmode_and(phy_dev->supported, phy_dev->supported, supported);
1169         linkmode_copy(phy_dev->advertising, phy_dev->supported);
1170
1171         if (h->phy_if == PHY_INTERFACE_MODE_XGMII)
1172                 phy_dev->autoneg = false;
1173
1174         if (h->phy_if != PHY_INTERFACE_MODE_XGMII) {
1175                 phy_dev->dev_flags = 0;
1176
1177                 ret = phy_connect_direct(ndev, phy_dev, hns_nic_adjust_link,
1178                                          h->phy_if);
1179         } else {
1180                 ret = phy_attach_direct(ndev, phy_dev, 0, h->phy_if);
1181         }
1182         if (unlikely(ret))
1183                 return -ENODEV;
1184
1185         return 0;
1186 }
1187
1188 static int hns_nic_ring_open(struct net_device *netdev, int idx)
1189 {
1190         struct hns_nic_priv *priv = netdev_priv(netdev);
1191         struct hnae_handle *h = priv->ae_handle;
1192
1193         napi_enable(&priv->ring_data[idx].napi);
1194
1195         enable_irq(priv->ring_data[idx].ring->irq);
1196         h->dev->ops->toggle_ring_irq(priv->ring_data[idx].ring, 0);
1197
1198         return 0;
1199 }
1200
1201 static int hns_nic_net_set_mac_address(struct net_device *ndev, void *p)
1202 {
1203         struct hns_nic_priv *priv = netdev_priv(ndev);
1204         struct hnae_handle *h = priv->ae_handle;
1205         struct sockaddr *mac_addr = p;
1206         int ret;
1207
1208         if (!mac_addr || !is_valid_ether_addr((const u8 *)mac_addr->sa_data))
1209                 return -EADDRNOTAVAIL;
1210
1211         ret = h->dev->ops->set_mac_addr(h, mac_addr->sa_data);
1212         if (ret) {
1213                 netdev_err(ndev, "set_mac_address fail, ret=%d!\n", ret);
1214                 return ret;
1215         }
1216
1217         memcpy(ndev->dev_addr, mac_addr->sa_data, ndev->addr_len);
1218
1219         return 0;
1220 }
1221
1222 static void hns_nic_update_stats(struct net_device *netdev)
1223 {
1224         struct hns_nic_priv *priv = netdev_priv(netdev);
1225         struct hnae_handle *h = priv->ae_handle;
1226
1227         h->dev->ops->update_stats(h, &netdev->stats);
1228 }
1229
1230 /* set mac addr if it is configed. or leave it to the AE driver */
1231 static void hns_init_mac_addr(struct net_device *ndev)
1232 {
1233         struct hns_nic_priv *priv = netdev_priv(ndev);
1234
1235         if (!device_get_mac_address(priv->dev, ndev->dev_addr, ETH_ALEN)) {
1236                 eth_hw_addr_random(ndev);
1237                 dev_warn(priv->dev, "No valid mac, use random mac %pM",
1238                          ndev->dev_addr);
1239         }
1240 }
1241
1242 static void hns_nic_ring_close(struct net_device *netdev, int idx)
1243 {
1244         struct hns_nic_priv *priv = netdev_priv(netdev);
1245         struct hnae_handle *h = priv->ae_handle;
1246
1247         h->dev->ops->toggle_ring_irq(priv->ring_data[idx].ring, 1);
1248         disable_irq(priv->ring_data[idx].ring->irq);
1249
1250         napi_disable(&priv->ring_data[idx].napi);
1251 }
1252
1253 static int hns_nic_init_affinity_mask(int q_num, int ring_idx,
1254                                       struct hnae_ring *ring, cpumask_t *mask)
1255 {
1256         int cpu;
1257
1258         /* Diffrent irq banlance between 16core and 32core.
1259          * The cpu mask set by ring index according to the ring flag
1260          * which indicate the ring is tx or rx.
1261          */
1262         if (q_num == num_possible_cpus()) {
1263                 if (is_tx_ring(ring))
1264                         cpu = ring_idx;
1265                 else
1266                         cpu = ring_idx - q_num;
1267         } else {
1268                 if (is_tx_ring(ring))
1269                         cpu = ring_idx * 2;
1270                 else
1271                         cpu = (ring_idx - q_num) * 2 + 1;
1272         }
1273
1274         cpumask_clear(mask);
1275         cpumask_set_cpu(cpu, mask);
1276
1277         return cpu;
1278 }
1279
1280 static void hns_nic_free_irq(int q_num, struct hns_nic_priv *priv)
1281 {
1282         int i;
1283
1284         for (i = 0; i < q_num * 2; i++) {
1285                 if (priv->ring_data[i].ring->irq_init_flag == RCB_IRQ_INITED) {
1286                         irq_set_affinity_hint(priv->ring_data[i].ring->irq,
1287                                               NULL);
1288                         free_irq(priv->ring_data[i].ring->irq,
1289                                  &priv->ring_data[i]);
1290                         priv->ring_data[i].ring->irq_init_flag =
1291                                 RCB_IRQ_NOT_INITED;
1292                 }
1293         }
1294 }
1295
1296 static int hns_nic_init_irq(struct hns_nic_priv *priv)
1297 {
1298         struct hnae_handle *h = priv->ae_handle;
1299         struct hns_nic_ring_data *rd;
1300         int i;
1301         int ret;
1302         int cpu;
1303
1304         for (i = 0; i < h->q_num * 2; i++) {
1305                 rd = &priv->ring_data[i];
1306
1307                 if (rd->ring->irq_init_flag == RCB_IRQ_INITED)
1308                         break;
1309
1310                 snprintf(rd->ring->ring_name, RCB_RING_NAME_LEN,
1311                          "%s-%s%d", priv->netdev->name,
1312                          (is_tx_ring(rd->ring) ? "tx" : "rx"), rd->queue_index);
1313
1314                 rd->ring->ring_name[RCB_RING_NAME_LEN - 1] = '\0';
1315
1316                 ret = request_irq(rd->ring->irq,
1317                                   hns_irq_handle, 0, rd->ring->ring_name, rd);
1318                 if (ret) {
1319                         netdev_err(priv->netdev, "request irq(%d) fail\n",
1320                                    rd->ring->irq);
1321                         goto out_free_irq;
1322                 }
1323                 disable_irq(rd->ring->irq);
1324
1325                 cpu = hns_nic_init_affinity_mask(h->q_num, i,
1326                                                  rd->ring, &rd->mask);
1327
1328                 if (cpu_online(cpu))
1329                         irq_set_affinity_hint(rd->ring->irq,
1330                                               &rd->mask);
1331
1332                 rd->ring->irq_init_flag = RCB_IRQ_INITED;
1333         }
1334
1335         return 0;
1336
1337 out_free_irq:
1338         hns_nic_free_irq(h->q_num, priv);
1339         return ret;
1340 }
1341
1342 static int hns_nic_net_up(struct net_device *ndev)
1343 {
1344         struct hns_nic_priv *priv = netdev_priv(ndev);
1345         struct hnae_handle *h = priv->ae_handle;
1346         int i, j;
1347         int ret;
1348
1349         if (!test_bit(NIC_STATE_DOWN, &priv->state))
1350                 return 0;
1351
1352         ret = hns_nic_init_irq(priv);
1353         if (ret != 0) {
1354                 netdev_err(ndev, "hns init irq failed! ret=%d\n", ret);
1355                 return ret;
1356         }
1357
1358         for (i = 0; i < h->q_num * 2; i++) {
1359                 ret = hns_nic_ring_open(ndev, i);
1360                 if (ret)
1361                         goto out_has_some_queues;
1362         }
1363
1364         ret = h->dev->ops->set_mac_addr(h, ndev->dev_addr);
1365         if (ret)
1366                 goto out_set_mac_addr_err;
1367
1368         ret = h->dev->ops->start ? h->dev->ops->start(h) : 0;
1369         if (ret)
1370                 goto out_start_err;
1371
1372         if (ndev->phydev)
1373                 phy_start(ndev->phydev);
1374
1375         clear_bit(NIC_STATE_DOWN, &priv->state);
1376         (void)mod_timer(&priv->service_timer, jiffies + SERVICE_TIMER_HZ);
1377
1378         return 0;
1379
1380 out_start_err:
1381         netif_stop_queue(ndev);
1382 out_set_mac_addr_err:
1383 out_has_some_queues:
1384         for (j = i - 1; j >= 0; j--)
1385                 hns_nic_ring_close(ndev, j);
1386
1387         hns_nic_free_irq(h->q_num, priv);
1388         set_bit(NIC_STATE_DOWN, &priv->state);
1389
1390         return ret;
1391 }
1392
1393 static void hns_nic_net_down(struct net_device *ndev)
1394 {
1395         int i;
1396         struct hnae_ae_ops *ops;
1397         struct hns_nic_priv *priv = netdev_priv(ndev);
1398
1399         if (test_and_set_bit(NIC_STATE_DOWN, &priv->state))
1400                 return;
1401
1402         (void)del_timer_sync(&priv->service_timer);
1403         netif_tx_stop_all_queues(ndev);
1404         netif_carrier_off(ndev);
1405         netif_tx_disable(ndev);
1406         priv->link = 0;
1407
1408         if (ndev->phydev)
1409                 phy_stop(ndev->phydev);
1410
1411         ops = priv->ae_handle->dev->ops;
1412
1413         if (ops->stop)
1414                 ops->stop(priv->ae_handle);
1415
1416         netif_tx_stop_all_queues(ndev);
1417
1418         for (i = priv->ae_handle->q_num - 1; i >= 0; i--) {
1419                 hns_nic_ring_close(ndev, i);
1420                 hns_nic_ring_close(ndev, i + priv->ae_handle->q_num);
1421
1422                 /* clean tx buffers*/
1423                 hns_nic_tx_clr_all_bufs(priv->ring_data + i);
1424         }
1425 }
1426
1427 void hns_nic_net_reset(struct net_device *ndev)
1428 {
1429         struct hns_nic_priv *priv = netdev_priv(ndev);
1430         struct hnae_handle *handle = priv->ae_handle;
1431
1432         while (test_and_set_bit(NIC_STATE_RESETTING, &priv->state))
1433                 usleep_range(1000, 2000);
1434
1435         (void)hnae_reinit_handle(handle);
1436
1437         clear_bit(NIC_STATE_RESETTING, &priv->state);
1438 }
1439
1440 void hns_nic_net_reinit(struct net_device *netdev)
1441 {
1442         struct hns_nic_priv *priv = netdev_priv(netdev);
1443         enum hnae_port_type type = priv->ae_handle->port_type;
1444
1445         netif_trans_update(priv->netdev);
1446         while (test_and_set_bit(NIC_STATE_REINITING, &priv->state))
1447                 usleep_range(1000, 2000);
1448
1449         hns_nic_net_down(netdev);
1450
1451         /* Only do hns_nic_net_reset in debug mode
1452          * because of hardware limitation.
1453          */
1454         if (type == HNAE_PORT_DEBUG)
1455                 hns_nic_net_reset(netdev);
1456
1457         (void)hns_nic_net_up(netdev);
1458         clear_bit(NIC_STATE_REINITING, &priv->state);
1459 }
1460
1461 static int hns_nic_net_open(struct net_device *ndev)
1462 {
1463         struct hns_nic_priv *priv = netdev_priv(ndev);
1464         struct hnae_handle *h = priv->ae_handle;
1465         int ret;
1466
1467         if (test_bit(NIC_STATE_TESTING, &priv->state))
1468                 return -EBUSY;
1469
1470         priv->link = 0;
1471         netif_carrier_off(ndev);
1472
1473         ret = netif_set_real_num_tx_queues(ndev, h->q_num);
1474         if (ret < 0) {
1475                 netdev_err(ndev, "netif_set_real_num_tx_queues fail, ret=%d!\n",
1476                            ret);
1477                 return ret;
1478         }
1479
1480         ret = netif_set_real_num_rx_queues(ndev, h->q_num);
1481         if (ret < 0) {
1482                 netdev_err(ndev,
1483                            "netif_set_real_num_rx_queues fail, ret=%d!\n", ret);
1484                 return ret;
1485         }
1486
1487         ret = hns_nic_net_up(ndev);
1488         if (ret) {
1489                 netdev_err(ndev,
1490                            "hns net up fail, ret=%d!\n", ret);
1491                 return ret;
1492         }
1493
1494         return 0;
1495 }
1496
1497 static int hns_nic_net_stop(struct net_device *ndev)
1498 {
1499         hns_nic_net_down(ndev);
1500
1501         return 0;
1502 }
1503
1504 static void hns_tx_timeout_reset(struct hns_nic_priv *priv);
1505 #define HNS_TX_TIMEO_LIMIT (40 * HZ)
1506 static void hns_nic_net_timeout(struct net_device *ndev)
1507 {
1508         struct hns_nic_priv *priv = netdev_priv(ndev);
1509
1510         if (ndev->watchdog_timeo < HNS_TX_TIMEO_LIMIT) {
1511                 ndev->watchdog_timeo *= 2;
1512                 netdev_info(ndev, "watchdog_timo changed to %d.\n",
1513                             ndev->watchdog_timeo);
1514         } else {
1515                 ndev->watchdog_timeo = HNS_NIC_TX_TIMEOUT;
1516                 hns_tx_timeout_reset(priv);
1517         }
1518 }
1519
1520 static int hns_nic_do_ioctl(struct net_device *netdev, struct ifreq *ifr,
1521                             int cmd)
1522 {
1523         struct phy_device *phy_dev = netdev->phydev;
1524
1525         if (!netif_running(netdev))
1526                 return -EINVAL;
1527
1528         if (!phy_dev)
1529                 return -ENOTSUPP;
1530
1531         return phy_mii_ioctl(phy_dev, ifr, cmd);
1532 }
1533
1534 static netdev_tx_t hns_nic_net_xmit(struct sk_buff *skb,
1535                                     struct net_device *ndev)
1536 {
1537         struct hns_nic_priv *priv = netdev_priv(ndev);
1538
1539         assert(skb->queue_mapping < ndev->ae_handle->q_num);
1540
1541         return hns_nic_net_xmit_hw(ndev, skb,
1542                                    &tx_ring_data(priv, skb->queue_mapping));
1543 }
1544
1545 static void hns_nic_drop_rx_fetch(struct hns_nic_ring_data *ring_data,
1546                                   struct sk_buff *skb)
1547 {
1548         dev_kfree_skb_any(skb);
1549 }
1550
1551 #define HNS_LB_TX_RING  0
1552 static struct sk_buff *hns_assemble_skb(struct net_device *ndev)
1553 {
1554         struct sk_buff *skb;
1555         struct ethhdr *ethhdr;
1556         int frame_len;
1557
1558         /* allocate test skb */
1559         skb = alloc_skb(64, GFP_KERNEL);
1560         if (!skb)
1561                 return NULL;
1562
1563         skb_put(skb, 64);
1564         skb->dev = ndev;
1565         memset(skb->data, 0xFF, skb->len);
1566
1567         /* must be tcp/ip package */
1568         ethhdr = (struct ethhdr *)skb->data;
1569         ethhdr->h_proto = htons(ETH_P_IP);
1570
1571         frame_len = skb->len & (~1ul);
1572         memset(&skb->data[frame_len / 2], 0xAA,
1573                frame_len / 2 - 1);
1574
1575         skb->queue_mapping = HNS_LB_TX_RING;
1576
1577         return skb;
1578 }
1579
1580 static int hns_enable_serdes_lb(struct net_device *ndev)
1581 {
1582         struct hns_nic_priv *priv = netdev_priv(ndev);
1583         struct hnae_handle *h = priv->ae_handle;
1584         struct hnae_ae_ops *ops = h->dev->ops;
1585         int speed, duplex;
1586         int ret;
1587
1588         ret = ops->set_loopback(h, MAC_INTERNALLOOP_SERDES, 1);
1589         if (ret)
1590                 return ret;
1591
1592         ret = ops->start ? ops->start(h) : 0;
1593         if (ret)
1594                 return ret;
1595
1596         /* link adjust duplex*/
1597         if (h->phy_if != PHY_INTERFACE_MODE_XGMII)
1598                 speed = 1000;
1599         else
1600                 speed = 10000;
1601         duplex = 1;
1602
1603         ops->adjust_link(h, speed, duplex);
1604
1605         /* wait h/w ready */
1606         mdelay(300);
1607
1608         return 0;
1609 }
1610
1611 static void hns_disable_serdes_lb(struct net_device *ndev)
1612 {
1613         struct hns_nic_priv *priv = netdev_priv(ndev);
1614         struct hnae_handle *h = priv->ae_handle;
1615         struct hnae_ae_ops *ops = h->dev->ops;
1616
1617         ops->stop(h);
1618         ops->set_loopback(h, MAC_INTERNALLOOP_SERDES, 0);
1619 }
1620
1621 /**
1622  *hns_nic_clear_all_rx_fetch - clear the chip fetched descriptions. The
1623  *function as follows:
1624  *    1. if one rx ring has found the page_offset is not equal 0 between head
1625  *       and tail, it means that the chip fetched the wrong descs for the ring
1626  *       which buffer size is 4096.
1627  *    2. we set the chip serdes loopback and set rss indirection to the ring.
1628  *    3. construct 64-bytes ip broadcast packages, wait the associated rx ring
1629  *       recieving all packages and it will fetch new descriptions.
1630  *    4. recover to the original state.
1631  *
1632  *@ndev: net device
1633  */
1634 static int hns_nic_clear_all_rx_fetch(struct net_device *ndev)
1635 {
1636         struct hns_nic_priv *priv = netdev_priv(ndev);
1637         struct hnae_handle *h = priv->ae_handle;
1638         struct hnae_ae_ops *ops = h->dev->ops;
1639         struct hns_nic_ring_data *rd;
1640         struct hnae_ring *ring;
1641         struct sk_buff *skb;
1642         u32 *org_indir;
1643         u32 *cur_indir;
1644         int indir_size;
1645         int head, tail;
1646         int fetch_num;
1647         int i, j;
1648         bool found;
1649         int retry_times;
1650         int ret = 0;
1651
1652         /* alloc indir memory */
1653         indir_size = ops->get_rss_indir_size(h) * sizeof(*org_indir);
1654         org_indir = kzalloc(indir_size, GFP_KERNEL);
1655         if (!org_indir)
1656                 return -ENOMEM;
1657
1658         /* store the orginal indirection */
1659         ops->get_rss(h, org_indir, NULL, NULL);
1660
1661         cur_indir = kzalloc(indir_size, GFP_KERNEL);
1662         if (!cur_indir) {
1663                 ret = -ENOMEM;
1664                 goto cur_indir_alloc_err;
1665         }
1666
1667         /* set loopback */
1668         if (hns_enable_serdes_lb(ndev)) {
1669                 ret = -EINVAL;
1670                 goto enable_serdes_lb_err;
1671         }
1672
1673         /* foreach every rx ring to clear fetch desc */
1674         for (i = 0; i < h->q_num; i++) {
1675                 ring = &h->qs[i]->rx_ring;
1676                 head = readl_relaxed(ring->io_base + RCB_REG_HEAD);
1677                 tail = readl_relaxed(ring->io_base + RCB_REG_TAIL);
1678                 found = false;
1679                 fetch_num = ring_dist(ring, head, tail);
1680
1681                 while (head != tail) {
1682                         if (ring->desc_cb[head].page_offset != 0) {
1683                                 found = true;
1684                                 break;
1685                         }
1686
1687                         head++;
1688                         if (head == ring->desc_num)
1689                                 head = 0;
1690                 }
1691
1692                 if (found) {
1693                         for (j = 0; j < indir_size / sizeof(*org_indir); j++)
1694                                 cur_indir[j] = i;
1695                         ops->set_rss(h, cur_indir, NULL, 0);
1696
1697                         for (j = 0; j < fetch_num; j++) {
1698                                 /* alloc one skb and init */
1699                                 skb = hns_assemble_skb(ndev);
1700                                 if (!skb)
1701                                         goto out;
1702                                 rd = &tx_ring_data(priv, skb->queue_mapping);
1703                                 hns_nic_net_xmit_hw(ndev, skb, rd);
1704
1705                                 retry_times = 0;
1706                                 while (retry_times++ < 10) {
1707                                         mdelay(10);
1708                                         /* clean rx */
1709                                         rd = &rx_ring_data(priv, i);
1710                                         if (rd->poll_one(rd, fetch_num,
1711                                                          hns_nic_drop_rx_fetch))
1712                                                 break;
1713                                 }
1714
1715                                 retry_times = 0;
1716                                 while (retry_times++ < 10) {
1717                                         mdelay(10);
1718                                         /* clean tx ring 0 send package */
1719                                         rd = &tx_ring_data(priv,
1720                                                            HNS_LB_TX_RING);
1721                                         if (rd->poll_one(rd, fetch_num, NULL))
1722                                                 break;
1723                                 }
1724                         }
1725                 }
1726         }
1727
1728 out:
1729         /* restore everything */
1730         ops->set_rss(h, org_indir, NULL, 0);
1731         hns_disable_serdes_lb(ndev);
1732 enable_serdes_lb_err:
1733         kfree(cur_indir);
1734 cur_indir_alloc_err:
1735         kfree(org_indir);
1736
1737         return ret;
1738 }
1739
1740 static int hns_nic_change_mtu(struct net_device *ndev, int new_mtu)
1741 {
1742         struct hns_nic_priv *priv = netdev_priv(ndev);
1743         struct hnae_handle *h = priv->ae_handle;
1744         bool if_running = netif_running(ndev);
1745         int ret;
1746
1747         /* MTU < 68 is an error and causes problems on some kernels */
1748         if (new_mtu < 68)
1749                 return -EINVAL;
1750
1751         /* MTU no change */
1752         if (new_mtu == ndev->mtu)
1753                 return 0;
1754
1755         if (!h->dev->ops->set_mtu)
1756                 return -ENOTSUPP;
1757
1758         if (if_running) {
1759                 (void)hns_nic_net_stop(ndev);
1760                 msleep(100);
1761         }
1762
1763         if (priv->enet_ver != AE_VERSION_1 &&
1764             ndev->mtu <= BD_SIZE_2048_MAX_MTU &&
1765             new_mtu > BD_SIZE_2048_MAX_MTU) {
1766                 /* update desc */
1767                 hnae_reinit_all_ring_desc(h);
1768
1769                 /* clear the package which the chip has fetched */
1770                 ret = hns_nic_clear_all_rx_fetch(ndev);
1771
1772                 /* the page offset must be consist with desc */
1773                 hnae_reinit_all_ring_page_off(h);
1774
1775                 if (ret) {
1776                         netdev_err(ndev, "clear the fetched desc fail\n");
1777                         goto out;
1778                 }
1779         }
1780
1781         ret = h->dev->ops->set_mtu(h, new_mtu);
1782         if (ret) {
1783                 netdev_err(ndev, "set mtu fail, return value %d\n",
1784                            ret);
1785                 goto out;
1786         }
1787
1788         /* finally, set new mtu to netdevice */
1789         ndev->mtu = new_mtu;
1790
1791 out:
1792         if (if_running) {
1793                 if (hns_nic_net_open(ndev)) {
1794                         netdev_err(ndev, "hns net open fail\n");
1795                         ret = -EINVAL;
1796                 }
1797         }
1798
1799         return ret;
1800 }
1801
1802 static int hns_nic_set_features(struct net_device *netdev,
1803                                 netdev_features_t features)
1804 {
1805         struct hns_nic_priv *priv = netdev_priv(netdev);
1806
1807         switch (priv->enet_ver) {
1808         case AE_VERSION_1:
1809                 if (features & (NETIF_F_TSO | NETIF_F_TSO6))
1810                         netdev_info(netdev, "enet v1 do not support tso!\n");
1811                 break;
1812         default:
1813                 if (features & (NETIF_F_TSO | NETIF_F_TSO6)) {
1814                         priv->ops.fill_desc = fill_tso_desc;
1815                         priv->ops.maybe_stop_tx = hns_nic_maybe_stop_tso;
1816                         /* The chip only support 7*4096 */
1817                         netif_set_gso_max_size(netdev, 7 * 4096);
1818                 } else {
1819                         priv->ops.fill_desc = fill_v2_desc;
1820                         priv->ops.maybe_stop_tx = hns_nic_maybe_stop_tx;
1821                 }
1822                 break;
1823         }
1824         netdev->features = features;
1825         return 0;
1826 }
1827
1828 static netdev_features_t hns_nic_fix_features(
1829                 struct net_device *netdev, netdev_features_t features)
1830 {
1831         struct hns_nic_priv *priv = netdev_priv(netdev);
1832
1833         switch (priv->enet_ver) {
1834         case AE_VERSION_1:
1835                 features &= ~(NETIF_F_TSO | NETIF_F_TSO6 |
1836                                 NETIF_F_HW_VLAN_CTAG_FILTER);
1837                 break;
1838         default:
1839                 break;
1840         }
1841         return features;
1842 }
1843
1844 static int hns_nic_uc_sync(struct net_device *netdev, const unsigned char *addr)
1845 {
1846         struct hns_nic_priv *priv = netdev_priv(netdev);
1847         struct hnae_handle *h = priv->ae_handle;
1848
1849         if (h->dev->ops->add_uc_addr)
1850                 return h->dev->ops->add_uc_addr(h, addr);
1851
1852         return 0;
1853 }
1854
1855 static int hns_nic_uc_unsync(struct net_device *netdev,
1856                              const unsigned char *addr)
1857 {
1858         struct hns_nic_priv *priv = netdev_priv(netdev);
1859         struct hnae_handle *h = priv->ae_handle;
1860
1861         if (h->dev->ops->rm_uc_addr)
1862                 return h->dev->ops->rm_uc_addr(h, addr);
1863
1864         return 0;
1865 }
1866
1867 /**
1868  * nic_set_multicast_list - set mutl mac address
1869  * @netdev: net device
1870  * @p: mac address
1871  *
1872  * return void
1873  */
1874 static void hns_set_multicast_list(struct net_device *ndev)
1875 {
1876         struct hns_nic_priv *priv = netdev_priv(ndev);
1877         struct hnae_handle *h = priv->ae_handle;
1878         struct netdev_hw_addr *ha = NULL;
1879
1880         if (!h) {
1881                 netdev_err(ndev, "hnae handle is null\n");
1882                 return;
1883         }
1884
1885         if (h->dev->ops->clr_mc_addr)
1886                 if (h->dev->ops->clr_mc_addr(h))
1887                         netdev_err(ndev, "clear multicast address fail\n");
1888
1889         if (h->dev->ops->set_mc_addr) {
1890                 netdev_for_each_mc_addr(ha, ndev)
1891                         if (h->dev->ops->set_mc_addr(h, ha->addr))
1892                                 netdev_err(ndev, "set multicast fail\n");
1893         }
1894 }
1895
1896 static void hns_nic_set_rx_mode(struct net_device *ndev)
1897 {
1898         struct hns_nic_priv *priv = netdev_priv(ndev);
1899         struct hnae_handle *h = priv->ae_handle;
1900
1901         if (h->dev->ops->set_promisc_mode) {
1902                 if (ndev->flags & IFF_PROMISC)
1903                         h->dev->ops->set_promisc_mode(h, 1);
1904                 else
1905                         h->dev->ops->set_promisc_mode(h, 0);
1906         }
1907
1908         hns_set_multicast_list(ndev);
1909
1910         if (__dev_uc_sync(ndev, hns_nic_uc_sync, hns_nic_uc_unsync))
1911                 netdev_err(ndev, "sync uc address fail\n");
1912 }
1913
1914 static void hns_nic_get_stats64(struct net_device *ndev,
1915                                 struct rtnl_link_stats64 *stats)
1916 {
1917         int idx = 0;
1918         u64 tx_bytes = 0;
1919         u64 rx_bytes = 0;
1920         u64 tx_pkts = 0;
1921         u64 rx_pkts = 0;
1922         struct hns_nic_priv *priv = netdev_priv(ndev);
1923         struct hnae_handle *h = priv->ae_handle;
1924
1925         for (idx = 0; idx < h->q_num; idx++) {
1926                 tx_bytes += h->qs[idx]->tx_ring.stats.tx_bytes;
1927                 tx_pkts += h->qs[idx]->tx_ring.stats.tx_pkts;
1928                 rx_bytes += h->qs[idx]->rx_ring.stats.rx_bytes;
1929                 rx_pkts += h->qs[idx]->rx_ring.stats.rx_pkts;
1930         }
1931
1932         stats->tx_bytes = tx_bytes;
1933         stats->tx_packets = tx_pkts;
1934         stats->rx_bytes = rx_bytes;
1935         stats->rx_packets = rx_pkts;
1936
1937         stats->rx_errors = ndev->stats.rx_errors;
1938         stats->multicast = ndev->stats.multicast;
1939         stats->rx_length_errors = ndev->stats.rx_length_errors;
1940         stats->rx_crc_errors = ndev->stats.rx_crc_errors;
1941         stats->rx_missed_errors = ndev->stats.rx_missed_errors;
1942
1943         stats->tx_errors = ndev->stats.tx_errors;
1944         stats->rx_dropped = ndev->stats.rx_dropped;
1945         stats->tx_dropped = ndev->stats.tx_dropped;
1946         stats->collisions = ndev->stats.collisions;
1947         stats->rx_over_errors = ndev->stats.rx_over_errors;
1948         stats->rx_frame_errors = ndev->stats.rx_frame_errors;
1949         stats->rx_fifo_errors = ndev->stats.rx_fifo_errors;
1950         stats->tx_aborted_errors = ndev->stats.tx_aborted_errors;
1951         stats->tx_carrier_errors = ndev->stats.tx_carrier_errors;
1952         stats->tx_fifo_errors = ndev->stats.tx_fifo_errors;
1953         stats->tx_heartbeat_errors = ndev->stats.tx_heartbeat_errors;
1954         stats->tx_window_errors = ndev->stats.tx_window_errors;
1955         stats->rx_compressed = ndev->stats.rx_compressed;
1956         stats->tx_compressed = ndev->stats.tx_compressed;
1957 }
1958
1959 static u16
1960 hns_nic_select_queue(struct net_device *ndev, struct sk_buff *skb,
1961                      struct net_device *sb_dev)
1962 {
1963         struct ethhdr *eth_hdr = (struct ethhdr *)skb->data;
1964         struct hns_nic_priv *priv = netdev_priv(ndev);
1965
1966         /* fix hardware broadcast/multicast packets queue loopback */
1967         if (!AE_IS_VER1(priv->enet_ver) &&
1968             is_multicast_ether_addr(eth_hdr->h_dest))
1969                 return 0;
1970         else
1971                 return netdev_pick_tx(ndev, skb, NULL);
1972 }
1973
1974 static const struct net_device_ops hns_nic_netdev_ops = {
1975         .ndo_open = hns_nic_net_open,
1976         .ndo_stop = hns_nic_net_stop,
1977         .ndo_start_xmit = hns_nic_net_xmit,
1978         .ndo_tx_timeout = hns_nic_net_timeout,
1979         .ndo_set_mac_address = hns_nic_net_set_mac_address,
1980         .ndo_change_mtu = hns_nic_change_mtu,
1981         .ndo_do_ioctl = hns_nic_do_ioctl,
1982         .ndo_set_features = hns_nic_set_features,
1983         .ndo_fix_features = hns_nic_fix_features,
1984         .ndo_get_stats64 = hns_nic_get_stats64,
1985         .ndo_set_rx_mode = hns_nic_set_rx_mode,
1986         .ndo_select_queue = hns_nic_select_queue,
1987 };
1988
1989 static void hns_nic_update_link_status(struct net_device *netdev)
1990 {
1991         struct hns_nic_priv *priv = netdev_priv(netdev);
1992
1993         struct hnae_handle *h = priv->ae_handle;
1994
1995         if (h->phy_dev) {
1996                 if (h->phy_if != PHY_INTERFACE_MODE_XGMII)
1997                         return;
1998
1999                 (void)genphy_read_status(h->phy_dev);
2000         }
2001         hns_nic_adjust_link(netdev);
2002 }
2003
2004 /* for dumping key regs*/
2005 static void hns_nic_dump(struct hns_nic_priv *priv)
2006 {
2007         struct hnae_handle *h = priv->ae_handle;
2008         struct hnae_ae_ops *ops = h->dev->ops;
2009         u32 *data, reg_num, i;
2010
2011         if (ops->get_regs_len && ops->get_regs) {
2012                 reg_num = ops->get_regs_len(priv->ae_handle);
2013                 reg_num = (reg_num + 3ul) & ~3ul;
2014                 data = kcalloc(reg_num, sizeof(u32), GFP_KERNEL);
2015                 if (data) {
2016                         ops->get_regs(priv->ae_handle, data);
2017                         for (i = 0; i < reg_num; i += 4)
2018                                 pr_info("0x%08x: 0x%08x 0x%08x 0x%08x 0x%08x\n",
2019                                         i, data[i], data[i + 1],
2020                                         data[i + 2], data[i + 3]);
2021                         kfree(data);
2022                 }
2023         }
2024
2025         for (i = 0; i < h->q_num; i++) {
2026                 pr_info("tx_queue%d_next_to_clean:%d\n",
2027                         i, h->qs[i]->tx_ring.next_to_clean);
2028                 pr_info("tx_queue%d_next_to_use:%d\n",
2029                         i, h->qs[i]->tx_ring.next_to_use);
2030                 pr_info("rx_queue%d_next_to_clean:%d\n",
2031                         i, h->qs[i]->rx_ring.next_to_clean);
2032                 pr_info("rx_queue%d_next_to_use:%d\n",
2033                         i, h->qs[i]->rx_ring.next_to_use);
2034         }
2035 }
2036
2037 /* for resetting subtask */
2038 static void hns_nic_reset_subtask(struct hns_nic_priv *priv)
2039 {
2040         enum hnae_port_type type = priv->ae_handle->port_type;
2041
2042         if (!test_bit(NIC_STATE2_RESET_REQUESTED, &priv->state))
2043                 return;
2044         clear_bit(NIC_STATE2_RESET_REQUESTED, &priv->state);
2045
2046         /* If we're already down, removing or resetting, just bail */
2047         if (test_bit(NIC_STATE_DOWN, &priv->state) ||
2048             test_bit(NIC_STATE_REMOVING, &priv->state) ||
2049             test_bit(NIC_STATE_RESETTING, &priv->state))
2050                 return;
2051
2052         hns_nic_dump(priv);
2053         netdev_info(priv->netdev, "try to reset %s port!\n",
2054                     (type == HNAE_PORT_DEBUG ? "debug" : "service"));
2055
2056         rtnl_lock();
2057         /* put off any impending NetWatchDogTimeout */
2058         netif_trans_update(priv->netdev);
2059         hns_nic_net_reinit(priv->netdev);
2060
2061         rtnl_unlock();
2062 }
2063
2064 /* for doing service complete*/
2065 static void hns_nic_service_event_complete(struct hns_nic_priv *priv)
2066 {
2067         WARN_ON(!test_bit(NIC_STATE_SERVICE_SCHED, &priv->state));
2068         /* make sure to commit the things */
2069         smp_mb__before_atomic();
2070         clear_bit(NIC_STATE_SERVICE_SCHED, &priv->state);
2071 }
2072
2073 static void hns_nic_service_task(struct work_struct *work)
2074 {
2075         struct hns_nic_priv *priv
2076                 = container_of(work, struct hns_nic_priv, service_task);
2077         struct hnae_handle *h = priv->ae_handle;
2078
2079         hns_nic_reset_subtask(priv);
2080         hns_nic_update_link_status(priv->netdev);
2081         h->dev->ops->update_led_status(h);
2082         hns_nic_update_stats(priv->netdev);
2083
2084         hns_nic_service_event_complete(priv);
2085 }
2086
2087 static void hns_nic_task_schedule(struct hns_nic_priv *priv)
2088 {
2089         if (!test_bit(NIC_STATE_DOWN, &priv->state) &&
2090             !test_bit(NIC_STATE_REMOVING, &priv->state) &&
2091             !test_and_set_bit(NIC_STATE_SERVICE_SCHED, &priv->state))
2092                 (void)schedule_work(&priv->service_task);
2093 }
2094
2095 static void hns_nic_service_timer(struct timer_list *t)
2096 {
2097         struct hns_nic_priv *priv = from_timer(priv, t, service_timer);
2098
2099         (void)mod_timer(&priv->service_timer, jiffies + SERVICE_TIMER_HZ);
2100
2101         hns_nic_task_schedule(priv);
2102 }
2103
2104 /**
2105  * hns_tx_timeout_reset - initiate reset due to Tx timeout
2106  * @priv: driver private struct
2107  **/
2108 static void hns_tx_timeout_reset(struct hns_nic_priv *priv)
2109 {
2110         /* Do the reset outside of interrupt context */
2111         if (!test_bit(NIC_STATE_DOWN, &priv->state)) {
2112                 set_bit(NIC_STATE2_RESET_REQUESTED, &priv->state);
2113                 netdev_warn(priv->netdev,
2114                             "initiating reset due to tx timeout(%llu,0x%lx)\n",
2115                             priv->tx_timeout_count, priv->state);
2116                 priv->tx_timeout_count++;
2117                 hns_nic_task_schedule(priv);
2118         }
2119 }
2120
2121 static int hns_nic_init_ring_data(struct hns_nic_priv *priv)
2122 {
2123         struct hnae_handle *h = priv->ae_handle;
2124         struct hns_nic_ring_data *rd;
2125         bool is_ver1 = AE_IS_VER1(priv->enet_ver);
2126         int i;
2127
2128         if (h->q_num > NIC_MAX_Q_PER_VF) {
2129                 netdev_err(priv->netdev, "too much queue (%d)\n", h->q_num);
2130                 return -EINVAL;
2131         }
2132
2133         priv->ring_data = kzalloc(array3_size(h->q_num,
2134                                               sizeof(*priv->ring_data), 2),
2135                                   GFP_KERNEL);
2136         if (!priv->ring_data)
2137                 return -ENOMEM;
2138
2139         for (i = 0; i < h->q_num; i++) {
2140                 rd = &priv->ring_data[i];
2141                 rd->queue_index = i;
2142                 rd->ring = &h->qs[i]->tx_ring;
2143                 rd->poll_one = hns_nic_tx_poll_one;
2144                 rd->fini_process = is_ver1 ? hns_nic_tx_fini_pro :
2145                         hns_nic_tx_fini_pro_v2;
2146
2147                 netif_napi_add(priv->netdev, &rd->napi,
2148                                hns_nic_common_poll, NAPI_POLL_WEIGHT);
2149                 rd->ring->irq_init_flag = RCB_IRQ_NOT_INITED;
2150         }
2151         for (i = h->q_num; i < h->q_num * 2; i++) {
2152                 rd = &priv->ring_data[i];
2153                 rd->queue_index = i - h->q_num;
2154                 rd->ring = &h->qs[i - h->q_num]->rx_ring;
2155                 rd->poll_one = hns_nic_rx_poll_one;
2156                 rd->ex_process = hns_nic_rx_up_pro;
2157                 rd->fini_process = is_ver1 ? hns_nic_rx_fini_pro :
2158                         hns_nic_rx_fini_pro_v2;
2159
2160                 netif_napi_add(priv->netdev, &rd->napi,
2161                                hns_nic_common_poll, NAPI_POLL_WEIGHT);
2162                 rd->ring->irq_init_flag = RCB_IRQ_NOT_INITED;
2163         }
2164
2165         return 0;
2166 }
2167
2168 static void hns_nic_uninit_ring_data(struct hns_nic_priv *priv)
2169 {
2170         struct hnae_handle *h = priv->ae_handle;
2171         int i;
2172
2173         for (i = 0; i < h->q_num * 2; i++) {
2174                 netif_napi_del(&priv->ring_data[i].napi);
2175                 if (priv->ring_data[i].ring->irq_init_flag == RCB_IRQ_INITED) {
2176                         (void)irq_set_affinity_hint(
2177                                 priv->ring_data[i].ring->irq,
2178                                 NULL);
2179                         free_irq(priv->ring_data[i].ring->irq,
2180                                  &priv->ring_data[i]);
2181                 }
2182
2183                 priv->ring_data[i].ring->irq_init_flag = RCB_IRQ_NOT_INITED;
2184         }
2185         kfree(priv->ring_data);
2186 }
2187
2188 static void hns_nic_set_priv_ops(struct net_device *netdev)
2189 {
2190         struct hns_nic_priv *priv = netdev_priv(netdev);
2191         struct hnae_handle *h = priv->ae_handle;
2192
2193         if (AE_IS_VER1(priv->enet_ver)) {
2194                 priv->ops.fill_desc = fill_desc;
2195                 priv->ops.get_rxd_bnum = get_rx_desc_bnum;
2196                 priv->ops.maybe_stop_tx = hns_nic_maybe_stop_tx;
2197         } else {
2198                 priv->ops.get_rxd_bnum = get_v2rx_desc_bnum;
2199                 if ((netdev->features & NETIF_F_TSO) ||
2200                     (netdev->features & NETIF_F_TSO6)) {
2201                         priv->ops.fill_desc = fill_tso_desc;
2202                         priv->ops.maybe_stop_tx = hns_nic_maybe_stop_tso;
2203                         /* This chip only support 7*4096 */
2204                         netif_set_gso_max_size(netdev, 7 * 4096);
2205                 } else {
2206                         priv->ops.fill_desc = fill_v2_desc;
2207                         priv->ops.maybe_stop_tx = hns_nic_maybe_stop_tx;
2208                 }
2209                 /* enable tso when init
2210                  * control tso on/off through TSE bit in bd
2211                  */
2212                 h->dev->ops->set_tso_stats(h, 1);
2213         }
2214 }
2215
2216 static int hns_nic_try_get_ae(struct net_device *ndev)
2217 {
2218         struct hns_nic_priv *priv = netdev_priv(ndev);
2219         struct hnae_handle *h;
2220         int ret;
2221
2222         h = hnae_get_handle(&priv->netdev->dev,
2223                             priv->fwnode, priv->port_id, NULL);
2224         if (IS_ERR_OR_NULL(h)) {
2225                 ret = -ENODEV;
2226                 dev_dbg(priv->dev, "has not handle, register notifier!\n");
2227                 goto out;
2228         }
2229         priv->ae_handle = h;
2230
2231         ret = hns_nic_init_phy(ndev, h);
2232         if (ret) {
2233                 dev_err(priv->dev, "probe phy device fail!\n");
2234                 goto out_init_phy;
2235         }
2236
2237         ret = hns_nic_init_ring_data(priv);
2238         if (ret) {
2239                 ret = -ENOMEM;
2240                 goto out_init_ring_data;
2241         }
2242
2243         hns_nic_set_priv_ops(ndev);
2244
2245         ret = register_netdev(ndev);
2246         if (ret) {
2247                 dev_err(priv->dev, "probe register netdev fail!\n");
2248                 goto out_reg_ndev_fail;
2249         }
2250         return 0;
2251
2252 out_reg_ndev_fail:
2253         hns_nic_uninit_ring_data(priv);
2254         priv->ring_data = NULL;
2255 out_init_phy:
2256 out_init_ring_data:
2257         hnae_put_handle(priv->ae_handle);
2258         priv->ae_handle = NULL;
2259 out:
2260         return ret;
2261 }
2262
2263 static int hns_nic_notifier_action(struct notifier_block *nb,
2264                                    unsigned long action, void *data)
2265 {
2266         struct hns_nic_priv *priv =
2267                 container_of(nb, struct hns_nic_priv, notifier_block);
2268
2269         assert(action == HNAE_AE_REGISTER);
2270
2271         if (!hns_nic_try_get_ae(priv->netdev)) {
2272                 hnae_unregister_notifier(&priv->notifier_block);
2273                 priv->notifier_block.notifier_call = NULL;
2274         }
2275         return 0;
2276 }
2277
2278 static int hns_nic_dev_probe(struct platform_device *pdev)
2279 {
2280         struct device *dev = &pdev->dev;
2281         struct net_device *ndev;
2282         struct hns_nic_priv *priv;
2283         u32 port_id;
2284         int ret;
2285
2286         ndev = alloc_etherdev_mq(sizeof(struct hns_nic_priv), NIC_MAX_Q_PER_VF);
2287         if (!ndev)
2288                 return -ENOMEM;
2289
2290         platform_set_drvdata(pdev, ndev);
2291
2292         priv = netdev_priv(ndev);
2293         priv->dev = dev;
2294         priv->netdev = ndev;
2295
2296         if (dev_of_node(dev)) {
2297                 struct device_node *ae_node;
2298
2299                 if (of_device_is_compatible(dev->of_node,
2300                                             "hisilicon,hns-nic-v1"))
2301                         priv->enet_ver = AE_VERSION_1;
2302                 else
2303                         priv->enet_ver = AE_VERSION_2;
2304
2305                 ae_node = of_parse_phandle(dev->of_node, "ae-handle", 0);
2306                 if (!ae_node) {
2307                         ret = -ENODEV;
2308                         dev_err(dev, "not find ae-handle\n");
2309                         goto out_read_prop_fail;
2310                 }
2311                 priv->fwnode = &ae_node->fwnode;
2312         } else if (is_acpi_node(dev->fwnode)) {
2313                 struct fwnode_reference_args args;
2314
2315                 if (acpi_dev_found(hns_enet_acpi_match[0].id))
2316                         priv->enet_ver = AE_VERSION_1;
2317                 else if (acpi_dev_found(hns_enet_acpi_match[1].id))
2318                         priv->enet_ver = AE_VERSION_2;
2319                 else
2320                         return -ENXIO;
2321
2322                 /* try to find port-idx-in-ae first */
2323                 ret = acpi_node_get_property_reference(dev->fwnode,
2324                                                        "ae-handle", 0, &args);
2325                 if (ret) {
2326                         dev_err(dev, "not find ae-handle\n");
2327                         goto out_read_prop_fail;
2328                 }
2329                 if (!is_acpi_device_node(args.fwnode)) {
2330                         ret = -EINVAL;
2331                         goto out_read_prop_fail;
2332                 }
2333                 priv->fwnode = args.fwnode;
2334         } else {
2335                 dev_err(dev, "cannot read cfg data from OF or acpi\n");
2336                 return -ENXIO;
2337         }
2338
2339         ret = device_property_read_u32(dev, "port-idx-in-ae", &port_id);
2340         if (ret) {
2341                 /* only for old code compatible */
2342                 ret = device_property_read_u32(dev, "port-id", &port_id);
2343                 if (ret)
2344                         goto out_read_prop_fail;
2345                 /* for old dts, we need to caculate the port offset */
2346                 port_id = port_id < HNS_SRV_OFFSET ? port_id + HNS_DEBUG_OFFSET
2347                         : port_id - HNS_SRV_OFFSET;
2348         }
2349         priv->port_id = port_id;
2350
2351         hns_init_mac_addr(ndev);
2352
2353         ndev->watchdog_timeo = HNS_NIC_TX_TIMEOUT;
2354         ndev->priv_flags |= IFF_UNICAST_FLT;
2355         ndev->netdev_ops = &hns_nic_netdev_ops;
2356         hns_ethtool_set_ops(ndev);
2357
2358         ndev->features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
2359                 NETIF_F_RXCSUM | NETIF_F_SG | NETIF_F_GSO |
2360                 NETIF_F_GRO;
2361         ndev->vlan_features |=
2362                 NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM | NETIF_F_RXCSUM;
2363         ndev->vlan_features |= NETIF_F_SG | NETIF_F_GSO | NETIF_F_GRO;
2364
2365         /* MTU range: 68 - 9578 (v1) or 9706 (v2) */
2366         ndev->min_mtu = MAC_MIN_MTU;
2367         switch (priv->enet_ver) {
2368         case AE_VERSION_2:
2369                 ndev->features |= NETIF_F_TSO | NETIF_F_TSO6 | NETIF_F_NTUPLE;
2370                 ndev->hw_features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
2371                         NETIF_F_RXCSUM | NETIF_F_SG | NETIF_F_GSO |
2372                         NETIF_F_GRO | NETIF_F_TSO | NETIF_F_TSO6;
2373                 ndev->vlan_features |= NETIF_F_TSO | NETIF_F_TSO6;
2374                 ndev->max_mtu = MAC_MAX_MTU_V2 -
2375                                 (ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN);
2376                 break;
2377         default:
2378                 ndev->max_mtu = MAC_MAX_MTU -
2379                                 (ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN);
2380                 break;
2381         }
2382
2383         SET_NETDEV_DEV(ndev, dev);
2384
2385         if (!dma_set_mask_and_coherent(dev, DMA_BIT_MASK(64)))
2386                 dev_dbg(dev, "set mask to 64bit\n");
2387         else
2388                 dev_err(dev, "set mask to 64bit fail!\n");
2389
2390         /* carrier off reporting is important to ethtool even BEFORE open */
2391         netif_carrier_off(ndev);
2392
2393         timer_setup(&priv->service_timer, hns_nic_service_timer, 0);
2394         INIT_WORK(&priv->service_task, hns_nic_service_task);
2395
2396         set_bit(NIC_STATE_SERVICE_INITED, &priv->state);
2397         clear_bit(NIC_STATE_SERVICE_SCHED, &priv->state);
2398         set_bit(NIC_STATE_DOWN, &priv->state);
2399
2400         if (hns_nic_try_get_ae(priv->netdev)) {
2401                 priv->notifier_block.notifier_call = hns_nic_notifier_action;
2402                 ret = hnae_register_notifier(&priv->notifier_block);
2403                 if (ret) {
2404                         dev_err(dev, "register notifier fail!\n");
2405                         goto out_notify_fail;
2406                 }
2407                 dev_dbg(dev, "has not handle, register notifier!\n");
2408         }
2409
2410         return 0;
2411
2412 out_notify_fail:
2413         (void)cancel_work_sync(&priv->service_task);
2414 out_read_prop_fail:
2415         /* safe for ACPI FW */
2416         of_node_put(to_of_node(priv->fwnode));
2417         free_netdev(ndev);
2418         return ret;
2419 }
2420
2421 static int hns_nic_dev_remove(struct platform_device *pdev)
2422 {
2423         struct net_device *ndev = platform_get_drvdata(pdev);
2424         struct hns_nic_priv *priv = netdev_priv(ndev);
2425
2426         if (ndev->reg_state != NETREG_UNINITIALIZED)
2427                 unregister_netdev(ndev);
2428
2429         if (priv->ring_data)
2430                 hns_nic_uninit_ring_data(priv);
2431         priv->ring_data = NULL;
2432
2433         if (ndev->phydev)
2434                 phy_disconnect(ndev->phydev);
2435
2436         if (!IS_ERR_OR_NULL(priv->ae_handle))
2437                 hnae_put_handle(priv->ae_handle);
2438         priv->ae_handle = NULL;
2439         if (priv->notifier_block.notifier_call)
2440                 hnae_unregister_notifier(&priv->notifier_block);
2441         priv->notifier_block.notifier_call = NULL;
2442
2443         set_bit(NIC_STATE_REMOVING, &priv->state);
2444         (void)cancel_work_sync(&priv->service_task);
2445
2446         /* safe for ACPI FW */
2447         of_node_put(to_of_node(priv->fwnode));
2448
2449         free_netdev(ndev);
2450         return 0;
2451 }
2452
2453 static const struct of_device_id hns_enet_of_match[] = {
2454         {.compatible = "hisilicon,hns-nic-v1",},
2455         {.compatible = "hisilicon,hns-nic-v2",},
2456         {},
2457 };
2458
2459 MODULE_DEVICE_TABLE(of, hns_enet_of_match);
2460
2461 static struct platform_driver hns_nic_dev_driver = {
2462         .driver = {
2463                 .name = "hns-nic",
2464                 .of_match_table = hns_enet_of_match,
2465                 .acpi_match_table = ACPI_PTR(hns_enet_acpi_match),
2466         },
2467         .probe = hns_nic_dev_probe,
2468         .remove = hns_nic_dev_remove,
2469 };
2470
2471 module_platform_driver(hns_nic_dev_driver);
2472
2473 MODULE_DESCRIPTION("HISILICON HNS Ethernet driver");
2474 MODULE_AUTHOR("Hisilicon, Inc.");
2475 MODULE_LICENSE("GPL");
2476 MODULE_ALIAS("platform:hns-nic");