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

   1 /*
   2  * Copyright (c) 2014-2015 Hisilicon Limited.
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; either version 2 of the License, or
   7  * (at your option) any later version.
   8  */
   9
  10 #include <linux/clk.h>
  11 #include <linux/cpumask.h>
  12 #include <linux/etherdevice.h>
  13 #include <linux/if_vlan.h>
  14 #include <linux/interrupt.h>
  15 #include <linux/io.h>
  16 #include <linux/ip.h>
  17 #include <linux/ipv6.h>
  18 #include <linux/module.h>
  19 #include <linux/phy.h>
  20 #include <linux/platform_device.h>
  21 #include <linux/skbuff.h>
  22
  23 #include "hnae.h"
  24 #include "hns_enet.h"
  25
  26 #define NIC_MAX_Q_PER_VF 16
  27 #define HNS_NIC_TX_TIMEOUT (5 * HZ)
  28
  29 #define SERVICE_TIMER_HZ (1 * HZ)
  30
  31 #define NIC_TX_CLEAN_MAX_NUM 256
  32 #define NIC_RX_CLEAN_MAX_NUM 64
  33
  34 #define RCB_IRQ_NOT_INITED 0
  35 #define RCB_IRQ_INITED 1
  36
  37 static void fill_desc(struct hnae_ring *ring, void *priv,
  38                       int size, dma_addr_t dma, int frag_end,
  39                       int buf_num, enum hns_desc_type type)
  40 {
  41         struct hnae_desc *desc = &ring->desc[ring->next_to_use];
  42         struct hnae_desc_cb *desc_cb = &ring->desc_cb[ring->next_to_use];
  43         struct sk_buff *skb;
  44         __be16 protocol;
  45         u32 ip_offset;
  46         u32 asid_bufnum_pid = 0;
  47         u32 flag_ipoffset = 0;
  48
  49         desc_cb->priv = priv;
  50         desc_cb->length = size;
  51         desc_cb->dma = dma;
  52         desc_cb->type = type;
  53
  54         desc->addr = cpu_to_le64(dma);
  55         desc->tx.send_size = cpu_to_le16((u16)size);
  56
  57         /*config bd buffer end */
  58         flag_ipoffset |= 1 << HNS_TXD_VLD_B;
  59
  60         asid_bufnum_pid |= buf_num << HNS_TXD_BUFNUM_S;
  61
  62         if (type == DESC_TYPE_SKB) {
  63                 skb = (struct sk_buff *)priv;
  64
  65                 if (skb->ip_summed == CHECKSUM_PARTIAL) {
  66                         protocol = skb->protocol;
  67                         ip_offset = ETH_HLEN;
  68
  69                         /*if it is a SW VLAN check the next protocol*/
  70                         if (protocol == htons(ETH_P_8021Q)) {
  71                                 ip_offset += VLAN_HLEN;
  72                                 protocol = vlan_get_protocol(skb);
  73                                 skb->protocol = protocol;
  74                         }
  75
  76                         if (skb->protocol == htons(ETH_P_IP)) {
  77                                 flag_ipoffset |= 1 << HNS_TXD_L3CS_B;
  78                                 /* check for tcp/udp header */
  79                                 flag_ipoffset |= 1 << HNS_TXD_L4CS_B;
  80
  81                         } else if (skb->protocol == htons(ETH_P_IPV6)) {
  82                                 /* ipv6 has not l3 cs, check for L4 header */
  83                                 flag_ipoffset |= 1 << HNS_TXD_L4CS_B;
  84                         }
  85
  86                         flag_ipoffset |= ip_offset << HNS_TXD_IPOFFSET_S;
  87                 }
  88         }
  89
  90         flag_ipoffset |= frag_end << HNS_TXD_FE_B;
  91
  92         desc->tx.asid_bufnum_pid = cpu_to_le16(asid_bufnum_pid);
  93         desc->tx.flag_ipoffset = cpu_to_le32(flag_ipoffset);
  94
  95         ring_ptr_move_fw(ring, next_to_use);
  96 }
  97
  98 static void unfill_desc(struct hnae_ring *ring)
  99 {
 100         ring_ptr_move_bw(ring, next_to_use);
 101 }
 102
 103 int hns_nic_net_xmit_hw(struct net_device *ndev,
 104                         struct sk_buff *skb,
 105                         struct hns_nic_ring_data *ring_data)
 106 {
 107         struct hns_nic_priv *priv = netdev_priv(ndev);
 108         struct device *dev = priv->dev;
 109         struct hnae_ring *ring = ring_data->ring;
 110         struct netdev_queue *dev_queue;
 111         struct skb_frag_struct *frag;
 112         int buf_num;
 113         dma_addr_t dma;
 114         int size, next_to_use;
 115         int i, j;
 116         struct sk_buff *new_skb;
 117
 118         assert(ring->max_desc_num_per_pkt <= ring->desc_num);
 119
 120         /* no. of segments (plus a header) */
 121         buf_num = skb_shinfo(skb)->nr_frags + 1;
 122
 123         if (unlikely(buf_num > ring->max_desc_num_per_pkt)) {
 124                 if (ring_space(ring) < 1) {
 125                         ring->stats.tx_busy++;
 126                         goto out_net_tx_busy;
 127                 }
 128
 129                 new_skb = skb_copy(skb, GFP_ATOMIC);
 130                 if (!new_skb) {
 131                         ring->stats.sw_err_cnt++;
 132                         netdev_err(ndev, "no memory to xmit!\n");
 133                         goto out_err_tx_ok;
 134                 }
 135
 136                 dev_kfree_skb_any(skb);
 137                 skb = new_skb;
 138                 buf_num = 1;
 139                 assert(skb_shinfo(skb)->nr_frags == 1);
 140         } else if (buf_num > ring_space(ring)) {
 141                 ring->stats.tx_busy++;
 142                 goto out_net_tx_busy;
 143         }
 144         next_to_use = ring->next_to_use;
 145
 146         /* fill the first part */
 147         size = skb_headlen(skb);
 148         dma = dma_map_single(dev, skb->data, size, DMA_TO_DEVICE);
 149         if (dma_mapping_error(dev, dma)) {
 150                 netdev_err(ndev, "TX head DMA map failed\n");
 151                 ring->stats.sw_err_cnt++;
 152                 goto out_err_tx_ok;
 153         }
 154         fill_desc(ring, skb, size, dma, buf_num == 1 ? 1 : 0, buf_num,
 155                   DESC_TYPE_SKB);
 156
 157         /* fill the fragments */
 158         for (i = 1; i < buf_num; i++) {
 159                 frag = &skb_shinfo(skb)->frags[i - 1];
 160                 size = skb_frag_size(frag);
 161                 dma = skb_frag_dma_map(dev, frag, 0, size, DMA_TO_DEVICE);
 162                 if (dma_mapping_error(dev, dma)) {
 163                         netdev_err(ndev, "TX frag(%d) DMA map failed\n", i);
 164                         ring->stats.sw_err_cnt++;
 165                         goto out_map_frag_fail;
 166                 }
 167                 fill_desc(ring, skb_frag_page(frag), size, dma,
 168                           buf_num - 1 == i ? 1 : 0, buf_num, DESC_TYPE_PAGE);
 169         }
 170
 171         /*complete translate all packets*/
 172         dev_queue = netdev_get_tx_queue(ndev, skb->queue_mapping);
 173         netdev_tx_sent_queue(dev_queue, skb->len);
 174
 175         wmb(); /* commit all data before submit */
 176         assert(skb->queue_mapping < priv->ae_handle->q_num);
 177         hnae_queue_xmit(priv->ae_handle->qs[skb->queue_mapping], buf_num);
 178         ring->stats.tx_pkts++;
 179         ring->stats.tx_bytes += skb->len;
 180
 181         return NETDEV_TX_OK;
 182
 183 out_map_frag_fail:
 184
 185         for (j = i - 1; j > 0; j--) {
 186                 unfill_desc(ring);
 187                 next_to_use = ring->next_to_use;
 188                 dma_unmap_page(dev, ring->desc_cb[next_to_use].dma,
 189                                ring->desc_cb[next_to_use].length,
 190                                DMA_TO_DEVICE);
 191         }
 192
 193         unfill_desc(ring);
 194         next_to_use = ring->next_to_use;
 195         dma_unmap_single(dev, ring->desc_cb[next_to_use].dma,
 196                          ring->desc_cb[next_to_use].length, DMA_TO_DEVICE);
 197
 198 out_err_tx_ok:
 199
 200         dev_kfree_skb_any(skb);
 201         return NETDEV_TX_OK;
 202
 203 out_net_tx_busy:
 204
 205         netif_stop_subqueue(ndev, skb->queue_mapping);
 206
 207         /* Herbert's original patch had:
 208          *  smp_mb__after_netif_stop_queue();
 209          * but since that doesn't exist yet, just open code it.
 210          */
 211         smp_mb();
 212         return NETDEV_TX_BUSY;
 213 }
 214
 215 /**
 216  * hns_nic_get_headlen - determine size of header for RSC/LRO/GRO/FCOE
 217  * @data: pointer to the start of the headers
 218  * @max: total length of section to find headers in
 219  *
 220  * This function is meant to determine the length of headers that will
 221  * be recognized by hardware for LRO, GRO, and RSC offloads.  The main
 222  * motivation of doing this is to only perform one pull for IPv4 TCP
 223  * packets so that we can do basic things like calculating the gso_size
 224  * based on the average data per packet.
 225  **/
 226 static unsigned int hns_nic_get_headlen(unsigned char *data, u32 flag,
 227                                         unsigned int max_size)
 228 {
 229         unsigned char *network;
 230         u8 hlen;
 231
 232         /* this should never happen, but better safe than sorry */
 233         if (max_size < ETH_HLEN)
 234                 return max_size;
 235
 236         /* initialize network frame pointer */
 237         network = data;
 238
 239         /* set first protocol and move network header forward */
 240         network += ETH_HLEN;
 241
 242         /* handle any vlan tag if present */
 243         if (hnae_get_field(flag, HNS_RXD_VLAN_M, HNS_RXD_VLAN_S)
 244                 == HNS_RX_FLAG_VLAN_PRESENT) {
 245                 if ((typeof(max_size))(network - data) > (max_size - VLAN_HLEN))
 246                         return max_size;
 247
 248                 network += VLAN_HLEN;
 249         }
 250
 251         /* handle L3 protocols */
 252         if (hnae_get_field(flag, HNS_RXD_L3ID_M, HNS_RXD_L3ID_S)
 253                 == HNS_RX_FLAG_L3ID_IPV4) {
 254                 if ((typeof(max_size))(network - data) >
 255                     (max_size - sizeof(struct iphdr)))
 256                         return max_size;
 257
 258                 /* access ihl as a u8 to avoid unaligned access on ia64 */
 259                 hlen = (network[0] & 0x0F) << 2;
 260
 261                 /* verify hlen meets minimum size requirements */
 262                 if (hlen < sizeof(struct iphdr))
 263                         return network - data;
 264
 265                 /* record next protocol if header is present */
 266         } else if (hnae_get_field(flag, HNS_RXD_L3ID_M, HNS_RXD_L3ID_S)
 267                 == HNS_RX_FLAG_L3ID_IPV6) {
 268                 if ((typeof(max_size))(network - data) >
 269                     (max_size - sizeof(struct ipv6hdr)))
 270                         return max_size;
 271
 272                 /* record next protocol */
 273                 hlen = sizeof(struct ipv6hdr);
 274         } else {
 275                 return network - data;
 276         }
 277
 278         /* relocate pointer to start of L4 header */
 279         network += hlen;
 280
 281         /* finally sort out TCP/UDP */
 282         if (hnae_get_field(flag, HNS_RXD_L4ID_M, HNS_RXD_L4ID_S)
 283                 == HNS_RX_FLAG_L4ID_TCP) {
 284                 if ((typeof(max_size))(network - data) >
 285                     (max_size - sizeof(struct tcphdr)))
 286                         return max_size;
 287
 288                 /* access doff as a u8 to avoid unaligned access on ia64 */
 289                 hlen = (network[12] & 0xF0) >> 2;
 290
 291                 /* verify hlen meets minimum size requirements */
 292                 if (hlen < sizeof(struct tcphdr))
 293                         return network - data;
 294
 295                 network += hlen;
 296         } else if (hnae_get_field(flag, HNS_RXD_L4ID_M, HNS_RXD_L4ID_S)
 297                 == HNS_RX_FLAG_L4ID_UDP) {
 298                 if ((typeof(max_size))(network - data) >
 299                     (max_size - sizeof(struct udphdr)))
 300                         return max_size;
 301
 302                 network += sizeof(struct udphdr);
 303         }
 304
 305         /* If everything has gone correctly network should be the
 306          * data section of the packet and will be the end of the header.
 307          * If not then it probably represents the end of the last recognized
 308          * header.
 309          */
 310         if ((typeof(max_size))(network - data) < max_size)
 311                 return network - data;
 312         else
 313                 return max_size;
 314 }
 315
 316 static void
 317 hns_nic_reuse_page(struct hnae_desc_cb *desc_cb, int tsize, int last_offset)
 318 {
 319          /* avoid re-using remote pages,flag default unreuse */
 320         if (likely(page_to_nid(desc_cb->priv) == numa_node_id())) {
 321                 /* move offset up to the next cache line */
 322                 desc_cb->page_offset += tsize;
 323
 324                 if (desc_cb->page_offset <= last_offset) {
 325                         desc_cb->reuse_flag = 1;
 326                         /* bump ref count on page before it is given*/
 327                         get_page(desc_cb->priv);
 328                 }
 329         }
 330 }
 331
 332 static int hns_nic_poll_rx_skb(struct hns_nic_ring_data *ring_data,
 333                                struct sk_buff **out_skb, int *out_bnum)
 334 {
 335         struct hnae_ring *ring = ring_data->ring;
 336         struct net_device *ndev = ring_data->napi.dev;
 337         struct sk_buff *skb;
 338         struct hnae_desc *desc;
 339         struct hnae_desc_cb *desc_cb;
 340         unsigned char *va;
 341         int bnum, length, size, i, truesize, last_offset;
 342         int pull_len;
 343         u32 bnum_flag;
 344
 345         last_offset = hnae_page_size(ring) - hnae_buf_size(ring);
 346         desc = &ring->desc[ring->next_to_clean];
 347         desc_cb = &ring->desc_cb[ring->next_to_clean];
 348         length = le16_to_cpu(desc->rx.pkt_len);
 349         bnum_flag = le32_to_cpu(desc->rx.ipoff_bnum_pid_flag);
 350         bnum = hnae_get_field(bnum_flag, HNS_RXD_BUFNUM_M, HNS_RXD_BUFNUM_S);
 351         *out_bnum = bnum;
 352         va = (unsigned char *)desc_cb->buf + desc_cb->page_offset;
 353
 354         skb = *out_skb = napi_alloc_skb(&ring_data->napi, HNS_RX_HEAD_SIZE);
 355         if (unlikely(!skb)) {
 356                 netdev_err(ndev, "alloc rx skb fail\n");
 357                 ring->stats.sw_err_cnt++;
 358                 return -ENOMEM;
 359         }
 360
 361         if (length <= HNS_RX_HEAD_SIZE) {
 362                 memcpy(__skb_put(skb, length), va, ALIGN(length, sizeof(long)));
 363
 364                 /* we can reuse buffer as-is, just make sure it is local */
 365                 if (likely(page_to_nid(desc_cb->priv) == numa_node_id()))
 366                         desc_cb->reuse_flag = 1;
 367                 else /* this page cannot be reused so discard it */
 368                         put_page(desc_cb->priv);
 369
 370                 ring_ptr_move_fw(ring, next_to_clean);
 371
 372                 if (unlikely(bnum != 1)) { /* check err*/
 373                         *out_bnum = 1;
 374                         goto out_bnum_err;
 375                 }
 376         } else {
 377                 ring->stats.seg_pkt_cnt++;
 378
 379                 pull_len = hns_nic_get_headlen(va, bnum_flag, HNS_RX_HEAD_SIZE);
 380                 memcpy(__skb_put(skb, pull_len), va,
 381                        ALIGN(pull_len, sizeof(long)));
 382
 383                 size = le16_to_cpu(desc->rx.size);
 384                 truesize = ALIGN(size, L1_CACHE_BYTES);
 385                 skb_add_rx_frag(skb, 0, desc_cb->priv,
 386                                 desc_cb->page_offset + pull_len,
 387                                 size - pull_len, truesize - pull_len);
 388
 389                 hns_nic_reuse_page(desc_cb, truesize, last_offset);
 390                 ring_ptr_move_fw(ring, next_to_clean);
 391
 392                 if (unlikely(bnum >= (int)MAX_SKB_FRAGS)) { /* check err*/
 393                         *out_bnum = 1;
 394                         goto out_bnum_err;
 395                 }
 396                 for (i = 1; i < bnum; i++) {
 397                         desc = &ring->desc[ring->next_to_clean];
 398                         desc_cb = &ring->desc_cb[ring->next_to_clean];
 399                         size = le16_to_cpu(desc->rx.size);
 400                         truesize = ALIGN(size, L1_CACHE_BYTES);
 401                         skb_add_rx_frag(skb, i, desc_cb->priv,
 402                                         desc_cb->page_offset,
 403                                         size, truesize);
 404
 405                         hns_nic_reuse_page(desc_cb, truesize, last_offset);
 406                         ring_ptr_move_fw(ring, next_to_clean);
 407                 }
 408         }
 409
 410         /* check except process, free skb and jump the desc */
 411         if (unlikely((!bnum) || (bnum > ring->max_desc_num_per_pkt))) {
 412 out_bnum_err:
 413                 *out_bnum = *out_bnum ? *out_bnum : 1; /* ntc moved,cannot 0*/
 414                 netdev_err(ndev, "invalid bnum(%d,%d,%d,%d),%016llx,%016llx\n",
 415                            bnum, ring->max_desc_num_per_pkt,
 416                            length, (int)MAX_SKB_FRAGS,
 417                            ((u64 *)desc)[0], ((u64 *)desc)[1]);
 418                 ring->stats.err_bd_num++;
 419                 dev_kfree_skb_any(skb);
 420                 return -EDOM;
 421         }
 422
 423         bnum_flag = le32_to_cpu(desc->rx.ipoff_bnum_pid_flag);
 424
 425         if (unlikely(!hnae_get_bit(bnum_flag, HNS_RXD_VLD_B))) {
 426                 netdev_err(ndev, "no valid bd,%016llx,%016llx\n",
 427                            ((u64 *)desc)[0], ((u64 *)desc)[1]);
 428                 ring->stats.non_vld_descs++;
 429                 dev_kfree_skb_any(skb);
 430                 return -EINVAL;
 431         }
 432
 433         if (unlikely((!desc->rx.pkt_len) ||
 434                      hnae_get_bit(bnum_flag, HNS_RXD_DROP_B))) {
 435                 ring->stats.err_pkt_len++;
 436                 dev_kfree_skb_any(skb);
 437                 return -EFAULT;
 438         }
 439
 440         if (unlikely(hnae_get_bit(bnum_flag, HNS_RXD_L2E_B))) {
 441                 ring->stats.l2_err++;
 442                 dev_kfree_skb_any(skb);
 443                 return -EFAULT;
 444         }
 445
 446         ring->stats.rx_pkts++;
 447         ring->stats.rx_bytes += skb->len;
 448
 449         if (unlikely(hnae_get_bit(bnum_flag, HNS_RXD_L3E_B) ||
 450                      hnae_get_bit(bnum_flag, HNS_RXD_L4E_B))) {
 451                 ring->stats.l3l4_csum_err++;
 452                 return 0;
 453         }
 454
 455         skb->ip_summed = CHECKSUM_UNNECESSARY;
 456
 457         return 0;
 458 }
 459
 460 static void
 461 hns_nic_alloc_rx_buffers(struct hns_nic_ring_data *ring_data, int cleand_count)
 462 {
 463         int i, ret;
 464         struct hnae_desc_cb res_cbs;
 465         struct hnae_desc_cb *desc_cb;
 466         struct hnae_ring *ring = ring_data->ring;
 467         struct net_device *ndev = ring_data->napi.dev;
 468
 469         for (i = 0; i < cleand_count; i++) {
 470                 desc_cb = &ring->desc_cb[ring->next_to_use];
 471                 if (desc_cb->reuse_flag) {
 472                         ring->stats.reuse_pg_cnt++;
 473                         hnae_reuse_buffer(ring, ring->next_to_use);
 474                 } else {
 475                         ret = hnae_reserve_buffer_map(ring, &res_cbs);
 476                         if (ret) {
 477                                 ring->stats.sw_err_cnt++;
 478                                 netdev_err(ndev, "hnae reserve buffer map failed.\n");
 479                                 break;
 480                         }
 481                         hnae_replace_buffer(ring, ring->next_to_use, &res_cbs);
 482                 }
 483
 484                 ring_ptr_move_fw(ring, next_to_use);
 485         }
 486
 487         wmb(); /* make all data has been write before submit */
 488         writel_relaxed(i, ring->io_base + RCB_REG_HEAD);
 489 }
 490
 491 /* return error number for error or number of desc left to take
 492  */
 493 static void hns_nic_rx_up_pro(struct hns_nic_ring_data *ring_data,
 494                               struct sk_buff *skb)
 495 {
 496         struct net_device *ndev = ring_data->napi.dev;
 497
 498         skb->protocol = eth_type_trans(skb, ndev);
 499         (void)napi_gro_receive(&ring_data->napi, skb);
 500         ndev->last_rx = jiffies;
 501 }
 502
 503 static int hns_nic_rx_poll_one(struct hns_nic_ring_data *ring_data,
 504                                int budget, void *v)
 505 {
 506         struct hnae_ring *ring = ring_data->ring;
 507         struct sk_buff *skb;
 508         int num, bnum, ex_num;
 509 #define RCB_NOF_ALLOC_RX_BUFF_ONCE 16
 510         int recv_pkts, recv_bds, clean_count, err;
 511
 512         num = readl_relaxed(ring->io_base + RCB_REG_FBDNUM);
 513         rmb(); /* make sure num taken effect before the other data is touched */
 514
 515         recv_pkts = 0, recv_bds = 0, clean_count = 0;
 516 recv:
 517         while (recv_pkts < budget && recv_bds < num) {
 518                 /* reuse or realloc buffers*/
 519                 if (clean_count >= RCB_NOF_ALLOC_RX_BUFF_ONCE) {
 520                         hns_nic_alloc_rx_buffers(ring_data, clean_count);
 521                         clean_count = 0;
 522                 }
 523
 524                 /* poll one pkg*/
 525                 err = hns_nic_poll_rx_skb(ring_data, &skb, &bnum);
 526                 if (unlikely(!skb)) /* this fault cannot be repaired */
 527                         break;
 528
 529                 recv_bds += bnum;
 530                 clean_count += bnum;
 531                 if (unlikely(err)) {  /* do jump the err */
 532                         recv_pkts++;
 533                         continue;
 534                 }
 535
 536                 /* do update ip stack process*/
 537                 ((void (*)(struct hns_nic_ring_data *, struct sk_buff *))v)(
 538                                                         ring_data, skb);
 539                 recv_pkts++;
 540         }
 541
 542         /* make all data has been write before submit */
 543         if (clean_count > 0) {
 544                 hns_nic_alloc_rx_buffers(ring_data, clean_count);
 545                 clean_count = 0;
 546         }
 547
 548         if (recv_pkts < budget) {
 549                 ex_num = readl_relaxed(ring->io_base + RCB_REG_FBDNUM);
 550                 rmb(); /*complete read rx ring bd number*/
 551                 if (ex_num > 0) {
 552                         num += ex_num;
 553                         goto recv;
 554                 }
 555         }
 556
 557         return recv_pkts;
 558 }
 559
 560 static void hns_nic_rx_fini_pro(struct hns_nic_ring_data *ring_data)
 561 {
 562         struct hnae_ring *ring = ring_data->ring;
 563         int num = 0;
 564
 565         /* for hardware bug fixed */
 566         num = readl_relaxed(ring->io_base + RCB_REG_FBDNUM);
 567
 568         if (num > 0) {
 569                 ring_data->ring->q->handle->dev->ops->toggle_ring_irq(
 570                         ring_data->ring, 1);
 571
 572                 napi_schedule(&ring_data->napi);
 573         }
 574 }
 575
 576 static inline void hns_nic_reclaim_one_desc(struct hnae_ring *ring,
 577                                             int *bytes, int *pkts)
 578 {
 579         struct hnae_desc_cb *desc_cb = &ring->desc_cb[ring->next_to_clean];
 580
 581         (*pkts) += (desc_cb->type == DESC_TYPE_SKB);
 582         (*bytes) += desc_cb->length;
 583         /* desc_cb will be cleaned, after hnae_free_buffer_detach*/
 584         hnae_free_buffer_detach(ring, ring->next_to_clean);
 585
 586         ring_ptr_move_fw(ring, next_to_clean);
 587 }
 588
 589 static int is_valid_clean_head(struct hnae_ring *ring, int h)
 590 {
 591         int u = ring->next_to_use;
 592         int c = ring->next_to_clean;
 593
 594         if (unlikely(h > ring->desc_num))
 595                 return 0;
 596
 597         assert(u > 0 && u < ring->desc_num);
 598         assert(c > 0 && c < ring->desc_num);
 599         assert(u != c && h != c); /* must be checked before call this func */
 600
 601         return u > c ? (h > c && h <= u) : (h > c || h <= u);
 602 }
 603
 604 /* netif_tx_lock will turn down the performance, set only when necessary */
 605 #ifdef CONFIG_NET_POLL_CONTROLLER
 606 #define NETIF_TX_LOCK(ndev) netif_tx_lock(ndev)
 607 #define NETIF_TX_UNLOCK(ndev) netif_tx_unlock(ndev)
 608 #else
 609 #define NETIF_TX_LOCK(ndev)
 610 #define NETIF_TX_UNLOCK(ndev)
 611 #endif
 612 /* reclaim all desc in one budget
 613  * return error or number of desc left
 614  */
 615 static int hns_nic_tx_poll_one(struct hns_nic_ring_data *ring_data,
 616                                int budget, void *v)
 617 {
 618         struct hnae_ring *ring = ring_data->ring;
 619         struct net_device *ndev = ring_data->napi.dev;
 620         struct netdev_queue *dev_queue;
 621         struct hns_nic_priv *priv = netdev_priv(ndev);
 622         int head;
 623         int bytes, pkts;
 624
 625         NETIF_TX_LOCK(ndev);
 626
 627         head = readl_relaxed(ring->io_base + RCB_REG_HEAD);
 628         rmb(); /* make sure head is ready before touch any data */
 629
 630         if (is_ring_empty(ring) || head == ring->next_to_clean) {
 631                 NETIF_TX_UNLOCK(ndev);
 632                 return 0; /* no data to poll */
 633         }
 634
 635         if (!is_valid_clean_head(ring, head)) {
 636                 netdev_err(ndev, "wrong head (%d, %d-%d)\n", head,
 637                            ring->next_to_use, ring->next_to_clean);
 638                 ring->stats.io_err_cnt++;
 639                 NETIF_TX_UNLOCK(ndev);
 640                 return -EIO;
 641         }
 642
 643         bytes = 0;
 644         pkts = 0;
 645         while (head != ring->next_to_clean)
 646                 hns_nic_reclaim_one_desc(ring, &bytes, &pkts);
 647
 648         NETIF_TX_UNLOCK(ndev);
 649
 650         dev_queue = netdev_get_tx_queue(ndev, ring_data->queue_index);
 651         netdev_tx_completed_queue(dev_queue, pkts, bytes);
 652
 653         if (unlikely(pkts && netif_carrier_ok(ndev) &&
 654                      (ring_space(ring) >= ring->max_desc_num_per_pkt * 2))) {
 655                 /* Make sure that anybody stopping the queue after this
 656                  * sees the new next_to_clean.
 657                  */
 658                 smp_mb();
 659                 if (netif_tx_queue_stopped(dev_queue) &&
 660                     !test_bit(NIC_STATE_DOWN, &priv->state)) {
 661                         netif_tx_wake_queue(dev_queue);
 662                         ring->stats.restart_queue++;
 663                 }
 664         }
 665         return 0;
 666 }
 667
 668 static void hns_nic_tx_fini_pro(struct hns_nic_ring_data *ring_data)
 669 {
 670         struct hnae_ring *ring = ring_data->ring;
 671         int head = ring->next_to_clean;
 672
 673         /* for hardware bug fixed */
 674         head = readl_relaxed(ring->io_base + RCB_REG_HEAD);
 675
 676         if (head != ring->next_to_clean) {
 677                 ring_data->ring->q->handle->dev->ops->toggle_ring_irq(
 678                         ring_data->ring, 1);
 679
 680                 napi_schedule(&ring_data->napi);
 681         }
 682 }
 683
 684 static void hns_nic_tx_clr_all_bufs(struct hns_nic_ring_data *ring_data)
 685 {
 686         struct hnae_ring *ring = ring_data->ring;
 687         struct net_device *ndev = ring_data->napi.dev;
 688         struct netdev_queue *dev_queue;
 689         int head;
 690         int bytes, pkts;
 691
 692         NETIF_TX_LOCK(ndev);
 693
 694         head = ring->next_to_use; /* ntu :soft setted ring position*/
 695         bytes = 0;
 696         pkts = 0;
 697         while (head != ring->next_to_clean)
 698                 hns_nic_reclaim_one_desc(ring, &bytes, &pkts);
 699
 700         NETIF_TX_UNLOCK(ndev);
 701
 702         dev_queue = netdev_get_tx_queue(ndev, ring_data->queue_index);
 703         netdev_tx_reset_queue(dev_queue);
 704 }
 705
 706 static int hns_nic_common_poll(struct napi_struct *napi, int budget)
 707 {
 708         struct hns_nic_ring_data *ring_data =
 709                 container_of(napi, struct hns_nic_ring_data, napi);
 710         int clean_complete = ring_data->poll_one(
 711                                 ring_data, budget, ring_data->ex_process);
 712
 713         if (clean_complete >= 0 && clean_complete < budget) {
 714                 napi_complete(napi);
 715                 ring_data->ring->q->handle->dev->ops->toggle_ring_irq(
 716                         ring_data->ring, 0);
 717
 718                 ring_data->fini_process(ring_data);
 719         }
 720
 721         return clean_complete;
 722 }
 723
 724 static irqreturn_t hns_irq_handle(int irq, void *dev)
 725 {
 726         struct hns_nic_ring_data *ring_data = (struct hns_nic_ring_data *)dev;
 727
 728         ring_data->ring->q->handle->dev->ops->toggle_ring_irq(
 729                 ring_data->ring, 1);
 730         napi_schedule(&ring_data->napi);
 731
 732         return IRQ_HANDLED;
 733 }
 734
 735 /**
 736  *hns_nic_adjust_link - adjust net work mode by the phy stat or new param
 737  *@ndev: net device
 738  */
 739 static void hns_nic_adjust_link(struct net_device *ndev)
 740 {
 741         struct hns_nic_priv *priv = netdev_priv(ndev);
 742         struct hnae_handle *h = priv->ae_handle;
 743
 744         h->dev->ops->adjust_link(h, ndev->phydev->speed, ndev->phydev->duplex);
 745 }
 746
 747 /**
 748  *hns_nic_init_phy - init phy
 749  *@ndev: net device
 750  *@h: ae handle
 751  * Return 0 on success, negative on failure
 752  */
 753 int hns_nic_init_phy(struct net_device *ndev, struct hnae_handle *h)
 754 {
 755         struct hns_nic_priv *priv = netdev_priv(ndev);
 756         struct phy_device *phy_dev = NULL;
 757
 758         if (!h->phy_node)
 759                 return 0;
 760
 761         if (h->phy_if != PHY_INTERFACE_MODE_XGMII)
 762                 phy_dev = of_phy_connect(ndev, h->phy_node,
 763                                          hns_nic_adjust_link, 0, h->phy_if);
 764         else
 765                 phy_dev = of_phy_attach(ndev, h->phy_node, 0, h->phy_if);
 766
 767         if (unlikely(!phy_dev) || IS_ERR(phy_dev))
 768                 return !phy_dev ? -ENODEV : PTR_ERR(phy_dev);
 769
 770         phy_dev->supported &= h->if_support;
 771         phy_dev->advertising = phy_dev->supported;
 772
 773         if (h->phy_if == PHY_INTERFACE_MODE_XGMII)
 774                 phy_dev->autoneg = false;
 775
 776         priv->phy = phy_dev;
 777
 778         return 0;
 779 }
 780
 781 static int hns_nic_ring_open(struct net_device *netdev, int idx)
 782 {
 783         struct hns_nic_priv *priv = netdev_priv(netdev);
 784         struct hnae_handle *h = priv->ae_handle;
 785
 786         napi_enable(&priv->ring_data[idx].napi);
 787
 788         enable_irq(priv->ring_data[idx].ring->irq);
 789         h->dev->ops->toggle_ring_irq(priv->ring_data[idx].ring, 0);
 790
 791         return 0;
 792 }
 793
 794 static int hns_nic_net_set_mac_address(struct net_device *ndev, void *p)
 795 {
 796         struct hns_nic_priv *priv = netdev_priv(ndev);
 797         struct hnae_handle *h = priv->ae_handle;
 798         struct sockaddr *mac_addr = p;
 799         int ret;
 800
 801         if (!mac_addr || !is_valid_ether_addr((const u8 *)mac_addr->sa_data))
 802                 return -EADDRNOTAVAIL;
 803
 804         ret = h->dev->ops->set_mac_addr(h, mac_addr->sa_data);
 805         if (ret) {
 806                 netdev_err(ndev, "set_mac_address fail, ret=%d!\n", ret);
 807                 return ret;
 808         }
 809
 810         memcpy(ndev->dev_addr, mac_addr->sa_data, ndev->addr_len);
 811
 812         return 0;
 813 }
 814
 815 void hns_nic_update_stats(struct net_device *netdev)
 816 {
 817         struct hns_nic_priv *priv = netdev_priv(netdev);
 818         struct hnae_handle *h = priv->ae_handle;
 819
 820         h->dev->ops->update_stats(h, &netdev->stats);
 821 }
 822
 823 /* set mac addr if it is configed. or leave it to the AE driver */
 824 static void hns_init_mac_addr(struct net_device *ndev)
 825 {
 826         struct hns_nic_priv *priv = netdev_priv(ndev);
 827         struct device_node *node = priv->dev->of_node;
 828         const void *mac_addr_temp;
 829
 830         mac_addr_temp = of_get_mac_address(node);
 831         if (mac_addr_temp && is_valid_ether_addr(mac_addr_temp)) {
 832                 memcpy(ndev->dev_addr, mac_addr_temp, ndev->addr_len);
 833         } else {
 834                 eth_hw_addr_random(ndev);
 835                 dev_warn(priv->dev, "No valid mac, use random mac %pM",
 836                          ndev->dev_addr);
 837         }
 838 }
 839
 840 static void hns_nic_ring_close(struct net_device *netdev, int idx)
 841 {
 842         struct hns_nic_priv *priv = netdev_priv(netdev);
 843         struct hnae_handle *h = priv->ae_handle;
 844
 845         h->dev->ops->toggle_ring_irq(priv->ring_data[idx].ring, 1);
 846         disable_irq(priv->ring_data[idx].ring->irq);
 847
 848         napi_disable(&priv->ring_data[idx].napi);
 849 }
 850
 851 static int hns_nic_init_irq(struct hns_nic_priv *priv)
 852 {
 853         struct hnae_handle *h = priv->ae_handle;
 854         struct hns_nic_ring_data *rd;
 855         int i;
 856         int ret;
 857         int cpu;
 858         cpumask_t mask;
 859
 860         for (i = 0; i < h->q_num * 2; i++) {
 861                 rd = &priv->ring_data[i];
 862
 863                 if (rd->ring->irq_init_flag == RCB_IRQ_INITED)
 864                         break;
 865
 866                 snprintf(rd->ring->ring_name, RCB_RING_NAME_LEN,
 867                          "%s-%s%d", priv->netdev->name,
 868                          (i < h->q_num ? "tx" : "rx"), rd->queue_index);
 869
 870                 rd->ring->ring_name[RCB_RING_NAME_LEN - 1] = '\0';
 871
 872                 ret = request_irq(rd->ring->irq,
 873                                   hns_irq_handle, 0, rd->ring->ring_name, rd);
 874                 if (ret) {
 875                         netdev_err(priv->netdev, "request irq(%d) fail\n",
 876                                    rd->ring->irq);
 877                         return ret;
 878                 }
 879                 disable_irq(rd->ring->irq);
 880                 rd->ring->irq_init_flag = RCB_IRQ_INITED;
 881
 882                 /*set cpu affinity*/
 883                 if (cpu_online(rd->queue_index)) {
 884                         cpumask_clear(&mask);
 885                         cpu = rd->queue_index;
 886                         cpumask_set_cpu(cpu, &mask);
 887                         irq_set_affinity_hint(rd->ring->irq, &mask);
 888                 }
 889         }
 890
 891         return 0;
 892 }
 893
 894 static int hns_nic_net_up(struct net_device *ndev)
 895 {
 896         struct hns_nic_priv *priv = netdev_priv(ndev);
 897         struct hnae_handle *h = priv->ae_handle;
 898         int i, j, k;
 899         int ret;
 900
 901         ret = hns_nic_init_irq(priv);
 902         if (ret != 0) {
 903                 netdev_err(ndev, "hns init irq failed! ret=%d\n", ret);
 904                 return ret;
 905         }
 906
 907         for (i = 0; i < h->q_num * 2; i++) {
 908                 ret = hns_nic_ring_open(ndev, i);
 909                 if (ret)
 910                         goto out_has_some_queues;
 911         }
 912
 913         for (k = 0; k < h->q_num; k++)
 914                 h->dev->ops->toggle_queue_status(h->qs[k], 1);
 915
 916         ret = h->dev->ops->set_mac_addr(h, ndev->dev_addr);
 917         if (ret)
 918                 goto out_set_mac_addr_err;
 919
 920         ret = h->dev->ops->start ? h->dev->ops->start(h) : 0;
 921         if (ret)
 922                 goto out_start_err;
 923
 924         if (priv->phy)
 925                 phy_start(priv->phy);
 926
 927         clear_bit(NIC_STATE_DOWN, &priv->state);
 928         (void)mod_timer(&priv->service_timer, jiffies + SERVICE_TIMER_HZ);
 929
 930         return 0;
 931
 932 out_start_err:
 933         netif_stop_queue(ndev);
 934 out_set_mac_addr_err:
 935         for (k = 0; k < h->q_num; k++)
 936                 h->dev->ops->toggle_queue_status(h->qs[k], 0);
 937 out_has_some_queues:
 938         for (j = i - 1; j >= 0; j--)
 939                 hns_nic_ring_close(ndev, j);
 940
 941         set_bit(NIC_STATE_DOWN, &priv->state);
 942
 943         return ret;
 944 }
 945
 946 static void hns_nic_net_down(struct net_device *ndev)
 947 {
 948         int i;
 949         struct hnae_ae_ops *ops;
 950         struct hns_nic_priv *priv = netdev_priv(ndev);
 951
 952         if (test_and_set_bit(NIC_STATE_DOWN, &priv->state))
 953                 return;
 954
 955         (void)del_timer_sync(&priv->service_timer);
 956         netif_tx_stop_all_queues(ndev);
 957         netif_carrier_off(ndev);
 958         netif_tx_disable(ndev);
 959         priv->link = 0;
 960
 961         if (priv->phy)
 962                 phy_stop(priv->phy);
 963
 964         ops = priv->ae_handle->dev->ops;
 965
 966         if (ops->stop)
 967                 ops->stop(priv->ae_handle);
 968
 969         netif_tx_stop_all_queues(ndev);
 970
 971         for (i = priv->ae_handle->q_num - 1; i >= 0; i--) {
 972                 hns_nic_ring_close(ndev, i);
 973                 hns_nic_ring_close(ndev, i + priv->ae_handle->q_num);
 974
 975                 /* clean tx buffers*/
 976                 hns_nic_tx_clr_all_bufs(priv->ring_data + i);
 977         }
 978 }
 979
 980 void hns_nic_net_reset(struct net_device *ndev)
 981 {
 982         struct hns_nic_priv *priv = netdev_priv(ndev);
 983         struct hnae_handle *handle = priv->ae_handle;
 984
 985         while (test_and_set_bit(NIC_STATE_RESETTING, &priv->state))
 986                 usleep_range(1000, 2000);
 987
 988         (void)hnae_reinit_handle(handle);
 989
 990         clear_bit(NIC_STATE_RESETTING, &priv->state);
 991 }
 992
 993 void hns_nic_net_reinit(struct net_device *netdev)
 994 {
 995         struct hns_nic_priv *priv = netdev_priv(netdev);
 996
 997         priv->netdev->trans_start = jiffies;
 998         while (test_and_set_bit(NIC_STATE_REINITING, &priv->state))
 999                 usleep_range(1000, 2000);
1000
1001         hns_nic_net_down(netdev);
1002         hns_nic_net_reset(netdev);
1003         (void)hns_nic_net_up(netdev);
1004         clear_bit(NIC_STATE_REINITING, &priv->state);
1005 }
1006
1007 static int hns_nic_net_open(struct net_device *ndev)
1008 {
1009         struct hns_nic_priv *priv = netdev_priv(ndev);
1010         struct hnae_handle *h = priv->ae_handle;
1011         int ret;
1012
1013         if (test_bit(NIC_STATE_TESTING, &priv->state))
1014                 return -EBUSY;
1015
1016         priv->link = 0;
1017         netif_carrier_off(ndev);
1018
1019         ret = netif_set_real_num_tx_queues(ndev, h->q_num);
1020         if (ret < 0) {
1021                 netdev_err(ndev, "netif_set_real_num_tx_queues fail, ret=%d!\n",
1022                            ret);
1023                 return ret;
1024         }
1025
1026         ret = netif_set_real_num_rx_queues(ndev, h->q_num);
1027         if (ret < 0) {
1028                 netdev_err(ndev,
1029                            "netif_set_real_num_rx_queues fail, ret=%d!\n", ret);
1030                 return ret;
1031         }
1032
1033         ret = hns_nic_net_up(ndev);
1034         if (ret) {
1035                 netdev_err(ndev,
1036                            "hns net up fail, ret=%d!\n", ret);
1037                 return ret;
1038         }
1039
1040         return 0;
1041 }
1042
1043 static int hns_nic_net_stop(struct net_device *ndev)
1044 {
1045         hns_nic_net_down(ndev);
1046
1047         return 0;
1048 }
1049
1050 static void hns_tx_timeout_reset(struct hns_nic_priv *priv);
1051 static void hns_nic_net_timeout(struct net_device *ndev)
1052 {
1053         struct hns_nic_priv *priv = netdev_priv(ndev);
1054
1055         hns_tx_timeout_reset(priv);
1056 }
1057
1058 static int hns_nic_do_ioctl(struct net_device *netdev, struct ifreq *ifr,
1059                             int cmd)
1060 {
1061         struct hns_nic_priv *priv = netdev_priv(netdev);
1062         struct phy_device *phy_dev = priv->phy;
1063
1064         if (!netif_running(netdev))
1065                 return -EINVAL;
1066
1067         if (!phy_dev)
1068                 return -ENOTSUPP;
1069
1070         return phy_mii_ioctl(phy_dev, ifr, cmd);
1071 }
1072
1073 /* use only for netconsole to poll with the device without interrupt */
1074 #ifdef CONFIG_NET_POLL_CONTROLLER
1075 void hns_nic_poll_controller(struct net_device *ndev)
1076 {
1077         struct hns_nic_priv *priv = netdev_priv(ndev);
1078         unsigned long flags;
1079         int i;
1080
1081         local_irq_save(flags);
1082         for (i = 0; i < priv->ae_handle->q_num * 2; i++)
1083                 napi_schedule(&priv->ring_data[i].napi);
1084         local_irq_restore(flags);
1085 }
1086 #endif
1087
1088 static netdev_tx_t hns_nic_net_xmit(struct sk_buff *skb,
1089                                     struct net_device *ndev)
1090 {
1091         struct hns_nic_priv *priv = netdev_priv(ndev);
1092         int ret;
1093
1094         assert(skb->queue_mapping < ndev->ae_handle->q_num);
1095         ret = hns_nic_net_xmit_hw(ndev, skb,
1096                                   &tx_ring_data(priv, skb->queue_mapping));
1097         if (ret == NETDEV_TX_OK) {
1098                 ndev->trans_start = jiffies;
1099                 ndev->stats.tx_bytes += skb->len;
1100                 ndev->stats.tx_packets++;
1101         }
1102         return (netdev_tx_t)ret;
1103 }
1104
1105 static int hns_nic_change_mtu(struct net_device *ndev, int new_mtu)
1106 {
1107         struct hns_nic_priv *priv = netdev_priv(ndev);
1108         struct hnae_handle *h = priv->ae_handle;
1109         int ret;
1110
1111         /* MTU < 68 is an error and causes problems on some kernels */
1112         if (new_mtu < 68)
1113                 return -EINVAL;
1114
1115         if (!h->dev->ops->set_mtu)
1116                 return -ENOTSUPP;
1117
1118         if (netif_running(ndev)) {
1119                 (void)hns_nic_net_stop(ndev);
1120                 msleep(100);
1121
1122                 ret = h->dev->ops->set_mtu(h, new_mtu);
1123                 if (ret)
1124                         netdev_err(ndev, "set mtu fail, return value %d\n",
1125                                    ret);
1126
1127                 if (hns_nic_net_open(ndev))
1128                         netdev_err(ndev, "hns net open fail\n");
1129         } else {
1130                 ret = h->dev->ops->set_mtu(h, new_mtu);
1131         }
1132
1133         if (!ret)
1134                 ndev->mtu = new_mtu;
1135
1136         return ret;
1137 }
1138
1139 /**
1140  * nic_set_multicast_list - set mutl mac address
1141  * @netdev: net device
1142  * @p: mac address
1143  *
1144  * return void
1145  */
1146 void hns_set_multicast_list(struct net_device *ndev)
1147 {
1148         struct hns_nic_priv *priv = netdev_priv(ndev);
1149         struct hnae_handle *h = priv->ae_handle;
1150         struct netdev_hw_addr *ha = NULL;
1151
1152         if (!h) {
1153                 netdev_err(ndev, "hnae handle is null\n");
1154                 return;
1155         }
1156
1157         if (h->dev->ops->set_mc_addr) {
1158                 netdev_for_each_mc_addr(ha, ndev)
1159                         if (h->dev->ops->set_mc_addr(h, ha->addr))
1160                                 netdev_err(ndev, "set multicast fail\n");
1161         }
1162 }
1163
1164 void hns_nic_set_rx_mode(struct net_device *ndev)
1165 {
1166         struct hns_nic_priv *priv = netdev_priv(ndev);
1167         struct hnae_handle *h = priv->ae_handle;
1168
1169         if (h->dev->ops->set_promisc_mode) {
1170                 if (ndev->flags & IFF_PROMISC)
1171                         h->dev->ops->set_promisc_mode(h, 1);
1172                 else
1173                         h->dev->ops->set_promisc_mode(h, 0);
1174         }
1175
1176         hns_set_multicast_list(ndev);
1177 }
1178
1179 struct rtnl_link_stats64 *hns_nic_get_stats64(struct net_device *ndev,
1180                                               struct rtnl_link_stats64 *stats)
1181 {
1182         int idx = 0;
1183         u64 tx_bytes = 0;
1184         u64 rx_bytes = 0;
1185         u64 tx_pkts = 0;
1186         u64 rx_pkts = 0;
1187         struct hns_nic_priv *priv = netdev_priv(ndev);
1188         struct hnae_handle *h = priv->ae_handle;
1189
1190         for (idx = 0; idx < h->q_num; idx++) {
1191                 tx_bytes += h->qs[idx]->tx_ring.stats.tx_bytes;
1192                 tx_pkts += h->qs[idx]->tx_ring.stats.tx_pkts;
1193                 rx_bytes += h->qs[idx]->rx_ring.stats.rx_bytes;
1194                 rx_pkts += h->qs[idx]->rx_ring.stats.rx_pkts;
1195         }
1196
1197         stats->tx_bytes = tx_bytes;
1198         stats->tx_packets = tx_pkts;
1199         stats->rx_bytes = rx_bytes;
1200         stats->rx_packets = rx_pkts;
1201
1202         stats->rx_errors = ndev->stats.rx_errors;
1203         stats->multicast = ndev->stats.multicast;
1204         stats->rx_length_errors = ndev->stats.rx_length_errors;
1205         stats->rx_crc_errors = ndev->stats.rx_crc_errors;
1206         stats->rx_missed_errors = ndev->stats.rx_missed_errors;
1207
1208         stats->tx_errors = ndev->stats.tx_errors;
1209         stats->rx_dropped = ndev->stats.rx_dropped;
1210         stats->tx_dropped = ndev->stats.tx_dropped;
1211         stats->collisions = ndev->stats.collisions;
1212         stats->rx_over_errors = ndev->stats.rx_over_errors;
1213         stats->rx_frame_errors = ndev->stats.rx_frame_errors;
1214         stats->rx_fifo_errors = ndev->stats.rx_fifo_errors;
1215         stats->tx_aborted_errors = ndev->stats.tx_aborted_errors;
1216         stats->tx_carrier_errors = ndev->stats.tx_carrier_errors;
1217         stats->tx_fifo_errors = ndev->stats.tx_fifo_errors;
1218         stats->tx_heartbeat_errors = ndev->stats.tx_heartbeat_errors;
1219         stats->tx_window_errors = ndev->stats.tx_window_errors;
1220         stats->rx_compressed = ndev->stats.rx_compressed;
1221         stats->tx_compressed = ndev->stats.tx_compressed;
1222
1223         return stats;
1224 }
1225
1226 static const struct net_device_ops hns_nic_netdev_ops = {
1227         .ndo_open = hns_nic_net_open,
1228         .ndo_stop = hns_nic_net_stop,
1229         .ndo_start_xmit = hns_nic_net_xmit,
1230         .ndo_tx_timeout = hns_nic_net_timeout,
1231         .ndo_set_mac_address = hns_nic_net_set_mac_address,
1232         .ndo_change_mtu = hns_nic_change_mtu,
1233         .ndo_do_ioctl = hns_nic_do_ioctl,
1234         .ndo_get_stats64 = hns_nic_get_stats64,
1235 #ifdef CONFIG_NET_POLL_CONTROLLER
1236         .ndo_poll_controller = hns_nic_poll_controller,
1237 #endif
1238         .ndo_set_rx_mode = hns_nic_set_rx_mode,
1239 };
1240
1241 static void hns_nic_update_link_status(struct net_device *netdev)
1242 {
1243         struct hns_nic_priv *priv = netdev_priv(netdev);
1244
1245         struct hnae_handle *h = priv->ae_handle;
1246         int state = 1;
1247
1248         if (priv->phy) {
1249                 if (!genphy_update_link(priv->phy))
1250                         state = priv->phy->link;
1251                 else
1252                         state = 0;
1253         }
1254         state = state && h->dev->ops->get_status(h);
1255
1256         if (state != priv->link) {
1257                 if (state) {
1258                         netif_carrier_on(netdev);
1259                         netif_tx_wake_all_queues(netdev);
1260                         netdev_info(netdev, "link up\n");
1261                 } else {
1262                         netif_carrier_off(netdev);
1263                         netdev_info(netdev, "link down\n");
1264                 }
1265                 priv->link = state;
1266         }
1267 }
1268
1269 /* for dumping key regs*/
1270 static void hns_nic_dump(struct hns_nic_priv *priv)
1271 {
1272         struct hnae_handle *h = priv->ae_handle;
1273         struct hnae_ae_ops *ops = h->dev->ops;
1274         u32 *data, reg_num, i;
1275
1276         if (ops->get_regs_len && ops->get_regs) {
1277                 reg_num = ops->get_regs_len(priv->ae_handle);
1278                 reg_num = (reg_num + 3ul) & ~3ul;
1279                 data = kcalloc(reg_num, sizeof(u32), GFP_KERNEL);
1280                 if (data) {
1281                         ops->get_regs(priv->ae_handle, data);
1282                         for (i = 0; i < reg_num; i += 4)
1283                                 pr_info("0x%08x: 0x%08x 0x%08x 0x%08x 0x%08x\n",
1284                                         i, data[i], data[i + 1],
1285                                         data[i + 2], data[i + 3]);
1286                         kfree(data);
1287                 }
1288         }
1289
1290         for (i = 0; i < h->q_num; i++) {
1291                 pr_info("tx_queue%d_next_to_clean:%d\n",
1292                         i, h->qs[i]->tx_ring.next_to_clean);
1293                 pr_info("tx_queue%d_next_to_use:%d\n",
1294                         i, h->qs[i]->tx_ring.next_to_use);
1295                 pr_info("rx_queue%d_next_to_clean:%d\n",
1296                         i, h->qs[i]->rx_ring.next_to_clean);
1297                 pr_info("rx_queue%d_next_to_use:%d\n",
1298                         i, h->qs[i]->rx_ring.next_to_use);
1299         }
1300 }
1301
1302 /* for resetting suntask*/
1303 static void hns_nic_reset_subtask(struct hns_nic_priv *priv)
1304 {
1305         enum hnae_port_type type = priv->ae_handle->port_type;
1306
1307         if (!test_bit(NIC_STATE2_RESET_REQUESTED, &priv->state))
1308                 return;
1309         clear_bit(NIC_STATE2_RESET_REQUESTED, &priv->state);
1310
1311         /* If we're already down, removing or resetting, just bail */
1312         if (test_bit(NIC_STATE_DOWN, &priv->state) ||
1313             test_bit(NIC_STATE_REMOVING, &priv->state) ||
1314             test_bit(NIC_STATE_RESETTING, &priv->state))
1315                 return;
1316
1317         hns_nic_dump(priv);
1318         netdev_info(priv->netdev, "Reset %s port\n",
1319                     (type == HNAE_PORT_DEBUG ? "debug" : "business"));
1320
1321         rtnl_lock();
1322         /* put off any impending NetWatchDogTimeout */
1323         priv->netdev->trans_start = jiffies;
1324
1325         if (type == HNAE_PORT_DEBUG)
1326                 hns_nic_net_reinit(priv->netdev);
1327         rtnl_unlock();
1328 }
1329
1330 /* for doing service complete*/
1331 static void hns_nic_service_event_complete(struct hns_nic_priv *priv)
1332 {
1333         assert(!test_bit(NIC_STATE_SERVICE_SCHED, &priv->state));
1334
1335         smp_mb__before_atomic();
1336         clear_bit(NIC_STATE_SERVICE_SCHED, &priv->state);
1337 }
1338
1339 static void hns_nic_service_task(struct work_struct *work)
1340 {
1341         struct hns_nic_priv *priv
1342                 = container_of(work, struct hns_nic_priv, service_task);
1343         struct hnae_handle *h = priv->ae_handle;
1344
1345         hns_nic_update_link_status(priv->netdev);
1346         h->dev->ops->update_led_status(h);
1347         hns_nic_update_stats(priv->netdev);
1348
1349         hns_nic_reset_subtask(priv);
1350         hns_nic_service_event_complete(priv);
1351 }
1352
1353 static void hns_nic_task_schedule(struct hns_nic_priv *priv)
1354 {
1355         if (!test_bit(NIC_STATE_DOWN, &priv->state) &&
1356             !test_bit(NIC_STATE_REMOVING, &priv->state) &&
1357             !test_and_set_bit(NIC_STATE_SERVICE_SCHED, &priv->state))
1358                 (void)schedule_work(&priv->service_task);
1359 }
1360
1361 static void hns_nic_service_timer(unsigned long data)
1362 {
1363         struct hns_nic_priv *priv = (struct hns_nic_priv *)data;
1364
1365         (void)mod_timer(&priv->service_timer, jiffies + SERVICE_TIMER_HZ);
1366
1367         hns_nic_task_schedule(priv);
1368 }
1369
1370 /**
1371  * hns_tx_timeout_reset - initiate reset due to Tx timeout
1372  * @priv: driver private struct
1373  **/
1374 static void hns_tx_timeout_reset(struct hns_nic_priv *priv)
1375 {
1376         /* Do the reset outside of interrupt context */
1377         if (!test_bit(NIC_STATE_DOWN, &priv->state)) {
1378                 set_bit(NIC_STATE2_RESET_REQUESTED, &priv->state);
1379                 netdev_warn(priv->netdev,
1380                             "initiating reset due to tx timeout(%llu,0x%lx)\n",
1381                             priv->tx_timeout_count, priv->state);
1382                 priv->tx_timeout_count++;
1383                 hns_nic_task_schedule(priv);
1384         }
1385 }
1386
1387 static int hns_nic_init_ring_data(struct hns_nic_priv *priv)
1388 {
1389         struct hnae_handle *h = priv->ae_handle;
1390         struct hns_nic_ring_data *rd;
1391         int i;
1392
1393         if (h->q_num > NIC_MAX_Q_PER_VF) {
1394                 netdev_err(priv->netdev, "too much queue (%d)\n", h->q_num);
1395                 return -EINVAL;
1396         }
1397
1398         priv->ring_data = kzalloc(h->q_num * sizeof(*priv->ring_data) * 2,
1399                                   GFP_KERNEL);
1400         if (!priv->ring_data)
1401                 return -ENOMEM;
1402
1403         for (i = 0; i < h->q_num; i++) {
1404                 rd = &priv->ring_data[i];
1405                 rd->queue_index = i;
1406                 rd->ring = &h->qs[i]->tx_ring;
1407                 rd->poll_one = hns_nic_tx_poll_one;
1408                 rd->fini_process = hns_nic_tx_fini_pro;
1409
1410                 netif_napi_add(priv->netdev, &rd->napi,
1411                                hns_nic_common_poll, NIC_TX_CLEAN_MAX_NUM);
1412                 rd->ring->irq_init_flag = RCB_IRQ_NOT_INITED;
1413         }
1414         for (i = h->q_num; i < h->q_num * 2; i++) {
1415                 rd = &priv->ring_data[i];
1416                 rd->queue_index = i - h->q_num;
1417                 rd->ring = &h->qs[i - h->q_num]->rx_ring;
1418                 rd->poll_one = hns_nic_rx_poll_one;
1419                 rd->ex_process = hns_nic_rx_up_pro;
1420                 rd->fini_process = hns_nic_rx_fini_pro;
1421
1422                 netif_napi_add(priv->netdev, &rd->napi,
1423                                hns_nic_common_poll, NIC_RX_CLEAN_MAX_NUM);
1424                 rd->ring->irq_init_flag = RCB_IRQ_NOT_INITED;
1425         }
1426
1427         return 0;
1428 }
1429
1430 static void hns_nic_uninit_ring_data(struct hns_nic_priv *priv)
1431 {
1432         struct hnae_handle *h = priv->ae_handle;
1433         int i;
1434
1435         for (i = 0; i < h->q_num * 2; i++) {
1436                 netif_napi_del(&priv->ring_data[i].napi);
1437                 if (priv->ring_data[i].ring->irq_init_flag == RCB_IRQ_INITED) {
1438                         irq_set_affinity_hint(priv->ring_data[i].ring->irq,
1439                                               NULL);
1440                         free_irq(priv->ring_data[i].ring->irq,
1441                                  &priv->ring_data[i]);
1442                 }
1443
1444                 priv->ring_data[i].ring->irq_init_flag = RCB_IRQ_NOT_INITED;
1445         }
1446         kfree(priv->ring_data);
1447 }
1448
1449 static int hns_nic_try_get_ae(struct net_device *ndev)
1450 {
1451         struct hns_nic_priv *priv = netdev_priv(ndev);
1452         struct hnae_handle *h;
1453         int ret;
1454
1455         h = hnae_get_handle(&priv->netdev->dev,
1456                             priv->ae_name, priv->port_id, NULL);
1457         if (IS_ERR_OR_NULL(h)) {
1458                 ret = PTR_ERR(h);
1459                 dev_dbg(priv->dev, "has not handle, register notifier!\n");
1460                 goto out;
1461         }
1462         priv->ae_handle = h;
1463
1464         ret = hns_nic_init_phy(ndev, h);
1465         if (ret) {
1466                 dev_err(priv->dev, "probe phy device fail!\n");
1467                 goto out_init_phy;
1468         }
1469
1470         ret = hns_nic_init_ring_data(priv);
1471         if (ret) {
1472                 ret = -ENOMEM;
1473                 goto out_init_ring_data;
1474         }
1475
1476         ret = register_netdev(ndev);
1477         if (ret) {
1478                 dev_err(priv->dev, "probe register netdev fail!\n");
1479                 goto out_reg_ndev_fail;
1480         }
1481         return 0;
1482
1483 out_reg_ndev_fail:
1484         hns_nic_uninit_ring_data(priv);
1485         priv->ring_data = NULL;
1486 out_init_phy:
1487 out_init_ring_data:
1488         hnae_put_handle(priv->ae_handle);
1489         priv->ae_handle = NULL;
1490 out:
1491         return ret;
1492 }
1493
1494 static int hns_nic_notifier_action(struct notifier_block *nb,
1495                                    unsigned long action, void *data)
1496 {
1497         struct hns_nic_priv *priv =
1498                 container_of(nb, struct hns_nic_priv, notifier_block);
1499
1500         assert(action == HNAE_AE_REGISTER);
1501
1502         if (!hns_nic_try_get_ae(priv->netdev)) {
1503                 hnae_unregister_notifier(&priv->notifier_block);
1504                 priv->notifier_block.notifier_call = NULL;
1505         }
1506         return 0;
1507 }
1508
1509 static int hns_nic_dev_probe(struct platform_device *pdev)
1510 {
1511         struct device *dev = &pdev->dev;
1512         struct net_device *ndev;
1513         struct hns_nic_priv *priv;
1514         struct device_node *node = dev->of_node;
1515         int ret;
1516
1517         ndev = alloc_etherdev_mq(sizeof(struct hns_nic_priv), NIC_MAX_Q_PER_VF);
1518         if (!ndev)
1519                 return -ENOMEM;
1520
1521         platform_set_drvdata(pdev, ndev);
1522
1523         priv = netdev_priv(ndev);
1524         priv->dev = dev;
1525         priv->netdev = ndev;
1526
1527         if (of_device_is_compatible(node, "hisilicon,hns-nic-v2"))
1528                 priv->enet_ver = AE_VERSION_2;
1529         else
1530                 priv->enet_ver = AE_VERSION_1;
1531
1532         ret = of_property_read_string(node, "ae-name", &priv->ae_name);
1533         if (ret)
1534                 goto out_read_string_fail;
1535
1536         ret = of_property_read_u32(node, "port-id", &priv->port_id);
1537         if (ret)
1538                 goto out_read_string_fail;
1539
1540         hns_init_mac_addr(ndev);
1541
1542         ndev->watchdog_timeo = HNS_NIC_TX_TIMEOUT;
1543         ndev->priv_flags |= IFF_UNICAST_FLT;
1544         ndev->netdev_ops = &hns_nic_netdev_ops;
1545         hns_ethtool_set_ops(ndev);
1546         ndev->features |= NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM |
1547                 NETIF_F_RXCSUM | NETIF_F_SG | NETIF_F_GSO |
1548                 NETIF_F_GRO;
1549         ndev->vlan_features |=
1550                 NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM | NETIF_F_RXCSUM;
1551         ndev->vlan_features |= NETIF_F_SG | NETIF_F_GSO | NETIF_F_GRO;
1552
1553         SET_NETDEV_DEV(ndev, dev);
1554
1555         if (!dma_set_mask_and_coherent(dev, DMA_BIT_MASK(64)))
1556                 dev_dbg(dev, "set mask to 64bit\n");
1557         else
1558                 dev_err(dev, "set mask to 32bit fail!\n");
1559
1560         /* carrier off reporting is important to ethtool even BEFORE open */
1561         netif_carrier_off(ndev);
1562
1563         setup_timer(&priv->service_timer, hns_nic_service_timer,
1564                     (unsigned long)priv);
1565         INIT_WORK(&priv->service_task, hns_nic_service_task);
1566
1567         set_bit(NIC_STATE_SERVICE_INITED, &priv->state);
1568         clear_bit(NIC_STATE_SERVICE_SCHED, &priv->state);
1569         set_bit(NIC_STATE_DOWN, &priv->state);
1570
1571         if (hns_nic_try_get_ae(priv->netdev)) {
1572                 priv->notifier_block.notifier_call = hns_nic_notifier_action;
1573                 ret = hnae_register_notifier(&priv->notifier_block);
1574                 if (ret) {
1575                         dev_err(dev, "register notifier fail!\n");
1576                         goto out_notify_fail;
1577                 }
1578                 dev_dbg(dev, "has not handle, register notifier!\n");
1579         }
1580
1581         return 0;
1582
1583 out_notify_fail:
1584         (void)cancel_work_sync(&priv->service_task);
1585 out_read_string_fail:
1586         free_netdev(ndev);
1587         return ret;
1588 }
1589
1590 static int hns_nic_dev_remove(struct platform_device *pdev)
1591 {
1592         struct net_device *ndev = platform_get_drvdata(pdev);
1593         struct hns_nic_priv *priv = netdev_priv(ndev);
1594
1595         if (ndev->reg_state != NETREG_UNINITIALIZED)
1596                 unregister_netdev(ndev);
1597
1598         if (priv->ring_data)
1599                 hns_nic_uninit_ring_data(priv);
1600         priv->ring_data = NULL;
1601
1602         if (priv->phy)
1603                 phy_disconnect(priv->phy);
1604         priv->phy = NULL;
1605
1606         if (!IS_ERR_OR_NULL(priv->ae_handle))
1607                 hnae_put_handle(priv->ae_handle);
1608         priv->ae_handle = NULL;
1609         if (priv->notifier_block.notifier_call)
1610                 hnae_unregister_notifier(&priv->notifier_block);
1611         priv->notifier_block.notifier_call = NULL;
1612
1613         set_bit(NIC_STATE_REMOVING, &priv->state);
1614         (void)cancel_work_sync(&priv->service_task);
1615
1616         free_netdev(ndev);
1617         return 0;
1618 }
1619
1620 static const struct of_device_id hns_enet_of_match[] = {
1621         {.compatible = "hisilicon,hns-nic-v1",},
1622         {.compatible = "hisilicon,hns-nic-v2",},
1623         {},
1624 };
1625
1626 MODULE_DEVICE_TABLE(of, hns_enet_of_match);
1627
1628 static struct platform_driver hns_nic_dev_driver = {
1629         .driver = {
1630                 .name = "hns-nic",
1631                 .of_match_table = hns_enet_of_match,
1632         },
1633         .probe = hns_nic_dev_probe,
1634         .remove = hns_nic_dev_remove,
1635 };
1636
1637 module_platform_driver(hns_nic_dev_driver);
1638
1639 MODULE_DESCRIPTION("HISILICON HNS Ethernet driver");
1640 MODULE_AUTHOR("Hisilicon, Inc.");
1641 MODULE_LICENSE("GPL");
1642 MODULE_ALIAS("platform:hns-nic");