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