drivers/net/fjes/fjes_main.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  *  FUJITSU Extended Socket Network Device driver
   4  *  Copyright (c) 2015 FUJITSU LIMITED
   5  */
   6
   7 #include <linux/module.h>
   8 #include <linux/types.h>
   9 #include <linux/nls.h>
  10 #include <linux/platform_device.h>
  11 #include <linux/netdevice.h>
  12 #include <linux/interrupt.h>
  13
  14 #include "fjes.h"
  15 #include "fjes_trace.h"
  16
  17 #define MAJ 1
  18 #define MIN 2
  19 #define DRV_VERSION __stringify(MAJ) "." __stringify(MIN)
  20 #define DRV_NAME        "fjes"
  21 char fjes_driver_name[] = DRV_NAME;
  22 char fjes_driver_version[] = DRV_VERSION;
  23 static const char fjes_driver_string[] =
  24                 "FUJITSU Extended Socket Network Device Driver";
  25 static const char fjes_copyright[] =
  26                 "Copyright (c) 2015 FUJITSU LIMITED";
  27
  28 MODULE_AUTHOR("Taku Izumi <izumi.taku@jp.fujitsu.com>");
  29 MODULE_DESCRIPTION("FUJITSU Extended Socket Network Device Driver");
  30 MODULE_LICENSE("GPL");
  31 MODULE_VERSION(DRV_VERSION);
  32
  33 #define ACPI_MOTHERBOARD_RESOURCE_HID "PNP0C02"
  34
  35 static const struct acpi_device_id fjes_acpi_ids[] = {
  36         {ACPI_MOTHERBOARD_RESOURCE_HID, 0},
  37         {"", 0},
  38 };
  39 MODULE_DEVICE_TABLE(acpi, fjes_acpi_ids);
  40
  41 static bool is_extended_socket_device(struct acpi_device *device)
  42 {
  43         struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL};
  44         char str_buf[sizeof(FJES_ACPI_SYMBOL) + 1];
  45         union acpi_object *str;
  46         acpi_status status;
  47         int result;
  48
  49         status = acpi_evaluate_object(device->handle, "_STR", NULL, &buffer);
  50         if (ACPI_FAILURE(status))
  51                 return false;
  52
  53         str = buffer.pointer;
  54         result = utf16s_to_utf8s((wchar_t *)str->string.pointer,
  55                                  str->string.length, UTF16_LITTLE_ENDIAN,
  56                                  str_buf, sizeof(str_buf) - 1);
  57         str_buf[result] = 0;
  58
  59         if (strncmp(FJES_ACPI_SYMBOL, str_buf, strlen(FJES_ACPI_SYMBOL)) != 0) {
  60                 kfree(buffer.pointer);
  61                 return false;
  62         }
  63         kfree(buffer.pointer);
  64
  65         return true;
  66 }
  67
  68 static int acpi_check_extended_socket_status(struct acpi_device *device)
  69 {
  70         unsigned long long sta;
  71         acpi_status status;
  72
  73         status = acpi_evaluate_integer(device->handle, "_STA", NULL, &sta);
  74         if (ACPI_FAILURE(status))
  75                 return -ENODEV;
  76
  77         if (!((sta & ACPI_STA_DEVICE_PRESENT) &&
  78               (sta & ACPI_STA_DEVICE_ENABLED) &&
  79               (sta & ACPI_STA_DEVICE_UI) &&
  80               (sta & ACPI_STA_DEVICE_FUNCTIONING)))
  81                 return -ENODEV;
  82
  83         return 0;
  84 }
  85
  86 static acpi_status
  87 fjes_get_acpi_resource(struct acpi_resource *acpi_res, void *data)
  88 {
  89         struct acpi_resource_address32 *addr;
  90         struct acpi_resource_irq *irq;
  91         struct resource *res = data;
  92
  93         switch (acpi_res->type) {
  94         case ACPI_RESOURCE_TYPE_ADDRESS32:
  95                 addr = &acpi_res->data.address32;
  96                 res[0].start = addr->address.minimum;
  97                 res[0].end = addr->address.minimum +
  98                         addr->address.address_length - 1;
  99                 break;
 100
 101         case ACPI_RESOURCE_TYPE_IRQ:
 102                 irq = &acpi_res->data.irq;
 103                 if (irq->interrupt_count != 1)
 104                         return AE_ERROR;
 105                 res[1].start = irq->interrupts[0];
 106                 res[1].end = irq->interrupts[0];
 107                 break;
 108
 109         default:
 110                 break;
 111         }
 112
 113         return AE_OK;
 114 }
 115
 116 static struct resource fjes_resource[] = {
 117         DEFINE_RES_MEM(0, 1),
 118         DEFINE_RES_IRQ(0)
 119 };
 120
 121 static int fjes_acpi_add(struct acpi_device *device)
 122 {
 123         struct platform_device *plat_dev;
 124         acpi_status status;
 125
 126         if (!is_extended_socket_device(device))
 127                 return -ENODEV;
 128
 129         if (acpi_check_extended_socket_status(device))
 130                 return -ENODEV;
 131
 132         status = acpi_walk_resources(device->handle, METHOD_NAME__CRS,
 133                                      fjes_get_acpi_resource, fjes_resource);
 134         if (ACPI_FAILURE(status))
 135                 return -ENODEV;
 136
 137         /* create platform_device */
 138         plat_dev = platform_device_register_simple(DRV_NAME, 0, fjes_resource,
 139                                                    ARRAY_SIZE(fjes_resource));
 140         if (IS_ERR(plat_dev))
 141                 return PTR_ERR(plat_dev);
 142
 143         device->driver_data = plat_dev;
 144
 145         return 0;
 146 }
 147
 148 static void fjes_acpi_remove(struct acpi_device *device)
 149 {
 150         struct platform_device *plat_dev;
 151
 152         plat_dev = (struct platform_device *)acpi_driver_data(device);
 153         platform_device_unregister(plat_dev);
 154 }
 155
 156 static struct acpi_driver fjes_acpi_driver = {
 157         .name = DRV_NAME,
 158         .class = DRV_NAME,
 159         .owner = THIS_MODULE,
 160         .ids = fjes_acpi_ids,
 161         .ops = {
 162                 .add = fjes_acpi_add,
 163                 .remove = fjes_acpi_remove,
 164         },
 165 };
 166
 167 static int fjes_setup_resources(struct fjes_adapter *adapter)
 168 {
 169         struct net_device *netdev = adapter->netdev;
 170         struct ep_share_mem_info *buf_pair;
 171         struct fjes_hw *hw = &adapter->hw;
 172         unsigned long flags;
 173         int result;
 174         int epidx;
 175
 176         mutex_lock(&hw->hw_info.lock);
 177         result = fjes_hw_request_info(hw);
 178         switch (result) {
 179         case 0:
 180                 for (epidx = 0; epidx < hw->max_epid; epidx++) {
 181                         hw->ep_shm_info[epidx].es_status =
 182                             hw->hw_info.res_buf->info.info[epidx].es_status;
 183                         hw->ep_shm_info[epidx].zone =
 184                             hw->hw_info.res_buf->info.info[epidx].zone;
 185                 }
 186                 break;
 187         default:
 188         case -ENOMSG:
 189         case -EBUSY:
 190                 adapter->force_reset = true;
 191
 192                 mutex_unlock(&hw->hw_info.lock);
 193                 return result;
 194         }
 195         mutex_unlock(&hw->hw_info.lock);
 196
 197         for (epidx = 0; epidx < (hw->max_epid); epidx++) {
 198                 if ((epidx != hw->my_epid) &&
 199                     (hw->ep_shm_info[epidx].es_status ==
 200                      FJES_ZONING_STATUS_ENABLE)) {
 201                         fjes_hw_raise_interrupt(hw, epidx,
 202                                                 REG_ICTL_MASK_INFO_UPDATE);
 203                         hw->ep_shm_info[epidx].ep_stats
 204                                 .send_intr_zoneupdate += 1;
 205                 }
 206         }
 207
 208         msleep(FJES_OPEN_ZONE_UPDATE_WAIT * hw->max_epid);
 209
 210         for (epidx = 0; epidx < (hw->max_epid); epidx++) {
 211                 if (epidx == hw->my_epid)
 212                         continue;
 213
 214                 buf_pair = &hw->ep_shm_info[epidx];
 215
 216                 spin_lock_irqsave(&hw->rx_status_lock, flags);
 217                 fjes_hw_setup_epbuf(&buf_pair->tx, netdev->dev_addr,
 218                                     netdev->mtu);
 219                 spin_unlock_irqrestore(&hw->rx_status_lock, flags);
 220
 221                 if (fjes_hw_epid_is_same_zone(hw, epidx)) {
 222                         mutex_lock(&hw->hw_info.lock);
 223                         result =
 224                         fjes_hw_register_buff_addr(hw, epidx, buf_pair);
 225                         mutex_unlock(&hw->hw_info.lock);
 226
 227                         switch (result) {
 228                         case 0:
 229                                 break;
 230                         case -ENOMSG:
 231                         case -EBUSY:
 232                         default:
 233                                 adapter->force_reset = true;
 234                                 return result;
 235                         }
 236
 237                         hw->ep_shm_info[epidx].ep_stats
 238                                 .com_regist_buf_exec += 1;
 239                 }
 240         }
 241
 242         return 0;
 243 }
 244
 245 static void fjes_rx_irq(struct fjes_adapter *adapter, int src_epid)
 246 {
 247         struct fjes_hw *hw = &adapter->hw;
 248
 249         fjes_hw_set_irqmask(hw, REG_ICTL_MASK_RX_DATA, true);
 250
 251         adapter->unset_rx_last = true;
 252         napi_schedule(&adapter->napi);
 253 }
 254
 255 static void fjes_stop_req_irq(struct fjes_adapter *adapter, int src_epid)
 256 {
 257         struct fjes_hw *hw = &adapter->hw;
 258         enum ep_partner_status status;
 259         unsigned long flags;
 260
 261         set_bit(src_epid, &hw->hw_info.buffer_unshare_reserve_bit);
 262
 263         status = fjes_hw_get_partner_ep_status(hw, src_epid);
 264         trace_fjes_stop_req_irq_pre(hw, src_epid, status);
 265         switch (status) {
 266         case EP_PARTNER_WAITING:
 267                 spin_lock_irqsave(&hw->rx_status_lock, flags);
 268                 hw->ep_shm_info[src_epid].tx.info->v1i.rx_status |=
 269                                 FJES_RX_STOP_REQ_DONE;
 270                 spin_unlock_irqrestore(&hw->rx_status_lock, flags);
 271                 clear_bit(src_epid, &hw->txrx_stop_req_bit);
 272                 fallthrough;
 273         case EP_PARTNER_UNSHARE:
 274         case EP_PARTNER_COMPLETE:
 275         default:
 276                 set_bit(src_epid, &adapter->unshare_watch_bitmask);
 277                 if (!work_pending(&adapter->unshare_watch_task))
 278                         queue_work(adapter->control_wq,
 279                                    &adapter->unshare_watch_task);
 280                 break;
 281         case EP_PARTNER_SHARED:
 282                 set_bit(src_epid, &hw->epstop_req_bit);
 283
 284                 if (!work_pending(&hw->epstop_task))
 285                         queue_work(adapter->control_wq, &hw->epstop_task);
 286                 break;
 287         }
 288         trace_fjes_stop_req_irq_post(hw, src_epid);
 289 }
 290
 291 static void fjes_txrx_stop_req_irq(struct fjes_adapter *adapter,
 292                                    int src_epid)
 293 {
 294         struct fjes_hw *hw = &adapter->hw;
 295         enum ep_partner_status status;
 296         unsigned long flags;
 297
 298         status = fjes_hw_get_partner_ep_status(hw, src_epid);
 299         trace_fjes_txrx_stop_req_irq_pre(hw, src_epid, status);
 300         switch (status) {
 301         case EP_PARTNER_UNSHARE:
 302         case EP_PARTNER_COMPLETE:
 303         default:
 304                 break;
 305         case EP_PARTNER_WAITING:
 306                 if (src_epid < hw->my_epid) {
 307                         spin_lock_irqsave(&hw->rx_status_lock, flags);
 308                         hw->ep_shm_info[src_epid].tx.info->v1i.rx_status |=
 309                                 FJES_RX_STOP_REQ_DONE;
 310                         spin_unlock_irqrestore(&hw->rx_status_lock, flags);
 311
 312                         clear_bit(src_epid, &hw->txrx_stop_req_bit);
 313                         set_bit(src_epid, &adapter->unshare_watch_bitmask);
 314
 315                         if (!work_pending(&adapter->unshare_watch_task))
 316                                 queue_work(adapter->control_wq,
 317                                            &adapter->unshare_watch_task);
 318                 }
 319                 break;
 320         case EP_PARTNER_SHARED:
 321                 if (hw->ep_shm_info[src_epid].rx.info->v1i.rx_status &
 322                     FJES_RX_STOP_REQ_REQUEST) {
 323                         set_bit(src_epid, &hw->epstop_req_bit);
 324                         if (!work_pending(&hw->epstop_task))
 325                                 queue_work(adapter->control_wq,
 326                                            &hw->epstop_task);
 327                 }
 328                 break;
 329         }
 330         trace_fjes_txrx_stop_req_irq_post(hw, src_epid);
 331 }
 332
 333 static void fjes_update_zone_irq(struct fjes_adapter *adapter,
 334                                  int src_epid)
 335 {
 336         struct fjes_hw *hw = &adapter->hw;
 337
 338         if (!work_pending(&hw->update_zone_task))
 339                 queue_work(adapter->control_wq, &hw->update_zone_task);
 340 }
 341
 342 static irqreturn_t fjes_intr(int irq, void *data)
 343 {
 344         struct fjes_adapter *adapter = data;
 345         struct fjes_hw *hw = &adapter->hw;
 346         irqreturn_t ret;
 347         u32 icr;
 348
 349         icr = fjes_hw_capture_interrupt_status(hw);
 350
 351         if (icr & REG_IS_MASK_IS_ASSERT) {
 352                 if (icr & REG_ICTL_MASK_RX_DATA) {
 353                         fjes_rx_irq(adapter, icr & REG_IS_MASK_EPID);
 354                         hw->ep_shm_info[icr & REG_IS_MASK_EPID].ep_stats
 355                                 .recv_intr_rx += 1;
 356                 }
 357
 358                 if (icr & REG_ICTL_MASK_DEV_STOP_REQ) {
 359                         fjes_stop_req_irq(adapter, icr & REG_IS_MASK_EPID);
 360                         hw->ep_shm_info[icr & REG_IS_MASK_EPID].ep_stats
 361                                 .recv_intr_stop += 1;
 362                 }
 363
 364                 if (icr & REG_ICTL_MASK_TXRX_STOP_REQ) {
 365                         fjes_txrx_stop_req_irq(adapter, icr & REG_IS_MASK_EPID);
 366                         hw->ep_shm_info[icr & REG_IS_MASK_EPID].ep_stats
 367                                 .recv_intr_unshare += 1;
 368                 }
 369
 370                 if (icr & REG_ICTL_MASK_TXRX_STOP_DONE)
 371                         fjes_hw_set_irqmask(hw,
 372                                             REG_ICTL_MASK_TXRX_STOP_DONE, true);
 373
 374                 if (icr & REG_ICTL_MASK_INFO_UPDATE) {
 375                         fjes_update_zone_irq(adapter, icr & REG_IS_MASK_EPID);
 376                         hw->ep_shm_info[icr & REG_IS_MASK_EPID].ep_stats
 377                                 .recv_intr_zoneupdate += 1;
 378                 }
 379
 380                 ret = IRQ_HANDLED;
 381         } else {
 382                 ret = IRQ_NONE;
 383         }
 384
 385         return ret;
 386 }
 387
 388 static int fjes_request_irq(struct fjes_adapter *adapter)
 389 {
 390         struct net_device *netdev = adapter->netdev;
 391         int result = -1;
 392
 393         adapter->interrupt_watch_enable = true;
 394         if (!delayed_work_pending(&adapter->interrupt_watch_task)) {
 395                 queue_delayed_work(adapter->control_wq,
 396                                    &adapter->interrupt_watch_task,
 397                                    FJES_IRQ_WATCH_DELAY);
 398         }
 399
 400         if (!adapter->irq_registered) {
 401                 result = request_irq(adapter->hw.hw_res.irq, fjes_intr,
 402                                      IRQF_SHARED, netdev->name, adapter);
 403                 if (result)
 404                         adapter->irq_registered = false;
 405                 else
 406                         adapter->irq_registered = true;
 407         }
 408
 409         return result;
 410 }
 411
 412 static void fjes_free_irq(struct fjes_adapter *adapter)
 413 {
 414         struct fjes_hw *hw = &adapter->hw;
 415
 416         adapter->interrupt_watch_enable = false;
 417         cancel_delayed_work_sync(&adapter->interrupt_watch_task);
 418
 419         fjes_hw_set_irqmask(hw, REG_ICTL_MASK_ALL, true);
 420
 421         if (adapter->irq_registered) {
 422                 free_irq(adapter->hw.hw_res.irq, adapter);
 423                 adapter->irq_registered = false;
 424         }
 425 }
 426
 427 static void fjes_free_resources(struct fjes_adapter *adapter)
 428 {
 429         struct net_device *netdev = adapter->netdev;
 430         struct fjes_device_command_param param;
 431         struct ep_share_mem_info *buf_pair;
 432         struct fjes_hw *hw = &adapter->hw;
 433         bool reset_flag = false;
 434         unsigned long flags;
 435         int result;
 436         int epidx;
 437
 438         for (epidx = 0; epidx < hw->max_epid; epidx++) {
 439                 if (epidx == hw->my_epid)
 440                         continue;
 441
 442                 mutex_lock(&hw->hw_info.lock);
 443                 result = fjes_hw_unregister_buff_addr(hw, epidx);
 444                 mutex_unlock(&hw->hw_info.lock);
 445
 446                 hw->ep_shm_info[epidx].ep_stats.com_unregist_buf_exec += 1;
 447
 448                 if (result)
 449                         reset_flag = true;
 450
 451                 buf_pair = &hw->ep_shm_info[epidx];
 452
 453                 spin_lock_irqsave(&hw->rx_status_lock, flags);
 454                 fjes_hw_setup_epbuf(&buf_pair->tx,
 455                                     netdev->dev_addr, netdev->mtu);
 456                 spin_unlock_irqrestore(&hw->rx_status_lock, flags);
 457
 458                 clear_bit(epidx, &hw->txrx_stop_req_bit);
 459         }
 460
 461         if (reset_flag || adapter->force_reset) {
 462                 result = fjes_hw_reset(hw);
 463
 464                 adapter->force_reset = false;
 465
 466                 if (result)
 467                         adapter->open_guard = true;
 468
 469                 hw->hw_info.buffer_share_bit = 0;
 470
 471                 memset((void *)&param, 0, sizeof(param));
 472
 473                 param.req_len = hw->hw_info.req_buf_size;
 474                 param.req_start = __pa(hw->hw_info.req_buf);
 475                 param.res_len = hw->hw_info.res_buf_size;
 476                 param.res_start = __pa(hw->hw_info.res_buf);
 477                 param.share_start = __pa(hw->hw_info.share->ep_status);
 478
 479                 fjes_hw_init_command_registers(hw, &param);
 480         }
 481 }
 482
 483 /* fjes_open - Called when a network interface is made active */
 484 static int fjes_open(struct net_device *netdev)
 485 {
 486         struct fjes_adapter *adapter = netdev_priv(netdev);
 487         struct fjes_hw *hw = &adapter->hw;
 488         int result;
 489
 490         if (adapter->open_guard)
 491                 return -ENXIO;
 492
 493         result = fjes_setup_resources(adapter);
 494         if (result)
 495                 goto err_setup_res;
 496
 497         hw->txrx_stop_req_bit = 0;
 498         hw->epstop_req_bit = 0;
 499
 500         napi_enable(&adapter->napi);
 501
 502         fjes_hw_capture_interrupt_status(hw);
 503
 504         result = fjes_request_irq(adapter);
 505         if (result)
 506                 goto err_req_irq;
 507
 508         fjes_hw_set_irqmask(hw, REG_ICTL_MASK_ALL, false);
 509
 510         netif_tx_start_all_queues(netdev);
 511         netif_carrier_on(netdev);
 512
 513         return 0;
 514
 515 err_req_irq:
 516         fjes_free_irq(adapter);
 517         napi_disable(&adapter->napi);
 518
 519 err_setup_res:
 520         fjes_free_resources(adapter);
 521         return result;
 522 }
 523
 524 /* fjes_close - Disables a network interface */
 525 static int fjes_close(struct net_device *netdev)
 526 {
 527         struct fjes_adapter *adapter = netdev_priv(netdev);
 528         struct fjes_hw *hw = &adapter->hw;
 529         unsigned long flags;
 530         int epidx;
 531
 532         netif_tx_stop_all_queues(netdev);
 533         netif_carrier_off(netdev);
 534
 535         fjes_hw_raise_epstop(hw);
 536
 537         napi_disable(&adapter->napi);
 538
 539         spin_lock_irqsave(&hw->rx_status_lock, flags);
 540         for (epidx = 0; epidx < hw->max_epid; epidx++) {
 541                 if (epidx == hw->my_epid)
 542                         continue;
 543
 544                 if (fjes_hw_get_partner_ep_status(hw, epidx) ==
 545                     EP_PARTNER_SHARED)
 546                         adapter->hw.ep_shm_info[epidx]
 547                                    .tx.info->v1i.rx_status &=
 548                                 ~FJES_RX_POLL_WORK;
 549         }
 550         spin_unlock_irqrestore(&hw->rx_status_lock, flags);
 551
 552         fjes_free_irq(adapter);
 553
 554         cancel_delayed_work_sync(&adapter->interrupt_watch_task);
 555         cancel_work_sync(&adapter->unshare_watch_task);
 556         adapter->unshare_watch_bitmask = 0;
 557         cancel_work_sync(&adapter->raise_intr_rxdata_task);
 558         cancel_work_sync(&adapter->tx_stall_task);
 559
 560         cancel_work_sync(&hw->update_zone_task);
 561         cancel_work_sync(&hw->epstop_task);
 562
 563         fjes_hw_wait_epstop(hw);
 564
 565         fjes_free_resources(adapter);
 566
 567         return 0;
 568 }
 569
 570 static int fjes_tx_send(struct fjes_adapter *adapter, int dest,
 571                         void *data, size_t len)
 572 {
 573         int retval;
 574
 575         retval = fjes_hw_epbuf_tx_pkt_send(&adapter->hw.ep_shm_info[dest].tx,
 576                                            data, len);
 577         if (retval)
 578                 return retval;
 579
 580         adapter->hw.ep_shm_info[dest].tx.info->v1i.tx_status =
 581                 FJES_TX_DELAY_SEND_PENDING;
 582         if (!work_pending(&adapter->raise_intr_rxdata_task))
 583                 queue_work(adapter->txrx_wq,
 584                            &adapter->raise_intr_rxdata_task);
 585
 586         retval = 0;
 587         return retval;
 588 }
 589
 590 static netdev_tx_t
 591 fjes_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
 592 {
 593         struct fjes_adapter *adapter = netdev_priv(netdev);
 594         struct fjes_hw *hw = &adapter->hw;
 595
 596         int max_epid, my_epid, dest_epid;
 597         enum ep_partner_status pstatus;
 598         struct netdev_queue *cur_queue;
 599         char shortpkt[VLAN_ETH_HLEN];
 600         bool is_multi, vlan;
 601         struct ethhdr *eth;
 602         u16 queue_no = 0;
 603         u16 vlan_id = 0;
 604         netdev_tx_t ret;
 605         char *data;
 606         int len;
 607
 608         ret = NETDEV_TX_OK;
 609         is_multi = false;
 610         cur_queue = netdev_get_tx_queue(netdev, queue_no);
 611
 612         eth = (struct ethhdr *)skb->data;
 613         my_epid = hw->my_epid;
 614
 615         vlan = (vlan_get_tag(skb, &vlan_id) == 0) ? true : false;
 616
 617         data = skb->data;
 618         len = skb->len;
 619
 620         if (is_multicast_ether_addr(eth->h_dest)) {
 621                 dest_epid = 0;
 622                 max_epid = hw->max_epid;
 623                 is_multi = true;
 624         } else if (is_local_ether_addr(eth->h_dest)) {
 625                 dest_epid = eth->h_dest[ETH_ALEN - 1];
 626                 max_epid = dest_epid + 1;
 627
 628                 if ((eth->h_dest[0] == 0x02) &&
 629                     (0x00 == (eth->h_dest[1] | eth->h_dest[2] |
 630                               eth->h_dest[3] | eth->h_dest[4])) &&
 631                     (dest_epid < hw->max_epid)) {
 632                         ;
 633                 } else {
 634                         dest_epid = 0;
 635                         max_epid = 0;
 636                         ret = NETDEV_TX_OK;
 637
 638                         adapter->stats64.tx_packets += 1;
 639                         hw->ep_shm_info[my_epid].net_stats.tx_packets += 1;
 640                         adapter->stats64.tx_bytes += len;
 641                         hw->ep_shm_info[my_epid].net_stats.tx_bytes += len;
 642                 }
 643         } else {
 644                 dest_epid = 0;
 645                 max_epid = 0;
 646                 ret = NETDEV_TX_OK;
 647
 648                 adapter->stats64.tx_packets += 1;
 649                 hw->ep_shm_info[my_epid].net_stats.tx_packets += 1;
 650                 adapter->stats64.tx_bytes += len;
 651                 hw->ep_shm_info[my_epid].net_stats.tx_bytes += len;
 652         }
 653
 654         for (; dest_epid < max_epid; dest_epid++) {
 655                 if (my_epid == dest_epid)
 656                         continue;
 657
 658                 pstatus = fjes_hw_get_partner_ep_status(hw, dest_epid);
 659                 if (pstatus != EP_PARTNER_SHARED) {
 660                         if (!is_multi)
 661                                 hw->ep_shm_info[dest_epid].ep_stats
 662                                         .tx_dropped_not_shared += 1;
 663                         ret = NETDEV_TX_OK;
 664                 } else if (!fjes_hw_check_epbuf_version(
 665                                 &adapter->hw.ep_shm_info[dest_epid].rx, 0)) {
 666                         /* version is NOT 0 */
 667                         adapter->stats64.tx_carrier_errors += 1;
 668                         hw->ep_shm_info[dest_epid].net_stats
 669                                                 .tx_carrier_errors += 1;
 670                         hw->ep_shm_info[dest_epid].ep_stats
 671                                         .tx_dropped_ver_mismatch += 1;
 672
 673                         ret = NETDEV_TX_OK;
 674                 } else if (!fjes_hw_check_mtu(
 675                                 &adapter->hw.ep_shm_info[dest_epid].rx,
 676                                 netdev->mtu)) {
 677                         adapter->stats64.tx_dropped += 1;
 678                         hw->ep_shm_info[dest_epid].net_stats.tx_dropped += 1;
 679                         adapter->stats64.tx_errors += 1;
 680                         hw->ep_shm_info[dest_epid].net_stats.tx_errors += 1;
 681                         hw->ep_shm_info[dest_epid].ep_stats
 682                                         .tx_dropped_buf_size_mismatch += 1;
 683
 684                         ret = NETDEV_TX_OK;
 685                 } else if (vlan &&
 686                            !fjes_hw_check_vlan_id(
 687                                 &adapter->hw.ep_shm_info[dest_epid].rx,
 688                                 vlan_id)) {
 689                         hw->ep_shm_info[dest_epid].ep_stats
 690                                 .tx_dropped_vlanid_mismatch += 1;
 691                         ret = NETDEV_TX_OK;
 692                 } else {
 693                         if (len < VLAN_ETH_HLEN) {
 694                                 memset(shortpkt, 0, VLAN_ETH_HLEN);
 695                                 memcpy(shortpkt, skb->data, skb->len);
 696                                 len = VLAN_ETH_HLEN;
 697                                 data = shortpkt;
 698                         }
 699
 700                         if (adapter->tx_retry_count == 0) {
 701                                 adapter->tx_start_jiffies = jiffies;
 702                                 adapter->tx_retry_count = 1;
 703                         } else {
 704                                 adapter->tx_retry_count++;
 705                         }
 706
 707                         if (fjes_tx_send(adapter, dest_epid, data, len)) {
 708                                 if (is_multi) {
 709                                         ret = NETDEV_TX_OK;
 710                                 } else if (
 711                                            ((long)jiffies -
 712                                             (long)adapter->tx_start_jiffies) >=
 713                                             FJES_TX_RETRY_TIMEOUT) {
 714                                         adapter->stats64.tx_fifo_errors += 1;
 715                                         hw->ep_shm_info[dest_epid].net_stats
 716                                                                 .tx_fifo_errors += 1;
 717                                         adapter->stats64.tx_errors += 1;
 718                                         hw->ep_shm_info[dest_epid].net_stats
 719                                                                 .tx_errors += 1;
 720
 721                                         ret = NETDEV_TX_OK;
 722                                 } else {
 723                                         netif_trans_update(netdev);
 724                                         hw->ep_shm_info[dest_epid].ep_stats
 725                                                 .tx_buffer_full += 1;
 726                                         netif_tx_stop_queue(cur_queue);
 727
 728                                         if (!work_pending(&adapter->tx_stall_task))
 729                                                 queue_work(adapter->txrx_wq,
 730                                                            &adapter->tx_stall_task);
 731
 732                                         ret = NETDEV_TX_BUSY;
 733                                 }
 734                         } else {
 735                                 if (!is_multi) {
 736                                         adapter->stats64.tx_packets += 1;
 737                                         hw->ep_shm_info[dest_epid].net_stats
 738                                                                 .tx_packets += 1;
 739                                         adapter->stats64.tx_bytes += len;
 740                                         hw->ep_shm_info[dest_epid].net_stats
 741                                                                 .tx_bytes += len;
 742                                 }
 743
 744                                 adapter->tx_retry_count = 0;
 745                                 ret = NETDEV_TX_OK;
 746                         }
 747                 }
 748         }
 749
 750         if (ret == NETDEV_TX_OK) {
 751                 dev_kfree_skb(skb);
 752                 if (is_multi) {
 753                         adapter->stats64.tx_packets += 1;
 754                         hw->ep_shm_info[my_epid].net_stats.tx_packets += 1;
 755                         adapter->stats64.tx_bytes += 1;
 756                         hw->ep_shm_info[my_epid].net_stats.tx_bytes += len;
 757                 }
 758         }
 759
 760         return ret;
 761 }
 762
 763 static void
 764 fjes_get_stats64(struct net_device *netdev, struct rtnl_link_stats64 *stats)
 765 {
 766         struct fjes_adapter *adapter = netdev_priv(netdev);
 767
 768         memcpy(stats, &adapter->stats64, sizeof(struct rtnl_link_stats64));
 769 }
 770
 771 static int fjes_change_mtu(struct net_device *netdev, int new_mtu)
 772 {
 773         struct fjes_adapter *adapter = netdev_priv(netdev);
 774         bool running = netif_running(netdev);
 775         struct fjes_hw *hw = &adapter->hw;
 776         unsigned long flags;
 777         int ret = -EINVAL;
 778         int idx, epidx;
 779
 780         for (idx = 0; fjes_support_mtu[idx] != 0; idx++) {
 781                 if (new_mtu <= fjes_support_mtu[idx]) {
 782                         new_mtu = fjes_support_mtu[idx];
 783                         if (new_mtu == netdev->mtu)
 784                                 return 0;
 785
 786                         ret = 0;
 787                         break;
 788                 }
 789         }
 790
 791         if (ret)
 792                 return ret;
 793
 794         if (running) {
 795                 spin_lock_irqsave(&hw->rx_status_lock, flags);
 796                 for (epidx = 0; epidx < hw->max_epid; epidx++) {
 797                         if (epidx == hw->my_epid)
 798                                 continue;
 799                         hw->ep_shm_info[epidx].tx.info->v1i.rx_status &=
 800                                 ~FJES_RX_MTU_CHANGING_DONE;
 801                 }
 802                 spin_unlock_irqrestore(&hw->rx_status_lock, flags);
 803
 804                 netif_tx_stop_all_queues(netdev);
 805                 netif_carrier_off(netdev);
 806                 cancel_work_sync(&adapter->tx_stall_task);
 807                 napi_disable(&adapter->napi);
 808
 809                 msleep(1000);
 810
 811                 netif_tx_stop_all_queues(netdev);
 812         }
 813
 814         netdev->mtu = new_mtu;
 815
 816         if (running) {
 817                 for (epidx = 0; epidx < hw->max_epid; epidx++) {
 818                         if (epidx == hw->my_epid)
 819                                 continue;
 820
 821                         spin_lock_irqsave(&hw->rx_status_lock, flags);
 822                         fjes_hw_setup_epbuf(&hw->ep_shm_info[epidx].tx,
 823                                             netdev->dev_addr,
 824                                             netdev->mtu);
 825
 826                         hw->ep_shm_info[epidx].tx.info->v1i.rx_status |=
 827                                 FJES_RX_MTU_CHANGING_DONE;
 828                         spin_unlock_irqrestore(&hw->rx_status_lock, flags);
 829                 }
 830
 831                 netif_tx_wake_all_queues(netdev);
 832                 netif_carrier_on(netdev);
 833                 napi_enable(&adapter->napi);
 834                 napi_schedule(&adapter->napi);
 835         }
 836
 837         return ret;
 838 }
 839
 840 static void fjes_tx_retry(struct net_device *netdev, unsigned int txqueue)
 841 {
 842         struct netdev_queue *queue = netdev_get_tx_queue(netdev, 0);
 843
 844         netif_tx_wake_queue(queue);
 845 }
 846
 847 static int fjes_vlan_rx_add_vid(struct net_device *netdev,
 848                                 __be16 proto, u16 vid)
 849 {
 850         struct fjes_adapter *adapter = netdev_priv(netdev);
 851         bool ret = true;
 852         int epid;
 853
 854         for (epid = 0; epid < adapter->hw.max_epid; epid++) {
 855                 if (epid == adapter->hw.my_epid)
 856                         continue;
 857
 858                 if (!fjes_hw_check_vlan_id(
 859                         &adapter->hw.ep_shm_info[epid].tx, vid))
 860                         ret = fjes_hw_set_vlan_id(
 861                                 &adapter->hw.ep_shm_info[epid].tx, vid);
 862         }
 863
 864         return ret ? 0 : -ENOSPC;
 865 }
 866
 867 static int fjes_vlan_rx_kill_vid(struct net_device *netdev,
 868                                  __be16 proto, u16 vid)
 869 {
 870         struct fjes_adapter *adapter = netdev_priv(netdev);
 871         int epid;
 872
 873         for (epid = 0; epid < adapter->hw.max_epid; epid++) {
 874                 if (epid == adapter->hw.my_epid)
 875                         continue;
 876
 877                 fjes_hw_del_vlan_id(&adapter->hw.ep_shm_info[epid].tx, vid);
 878         }
 879
 880         return 0;
 881 }
 882
 883 static const struct net_device_ops fjes_netdev_ops = {
 884         .ndo_open               = fjes_open,
 885         .ndo_stop               = fjes_close,
 886         .ndo_start_xmit         = fjes_xmit_frame,
 887         .ndo_get_stats64        = fjes_get_stats64,
 888         .ndo_change_mtu         = fjes_change_mtu,
 889         .ndo_tx_timeout         = fjes_tx_retry,
 890         .ndo_vlan_rx_add_vid    = fjes_vlan_rx_add_vid,
 891         .ndo_vlan_rx_kill_vid = fjes_vlan_rx_kill_vid,
 892 };
 893
 894 /* fjes_netdev_setup - netdevice initialization routine */
 895 static void fjes_netdev_setup(struct net_device *netdev)
 896 {
 897         ether_setup(netdev);
 898
 899         netdev->watchdog_timeo = FJES_TX_RETRY_INTERVAL;
 900         netdev->netdev_ops = &fjes_netdev_ops;
 901         fjes_set_ethtool_ops(netdev);
 902         netdev->mtu = fjes_support_mtu[3];
 903         netdev->min_mtu = fjes_support_mtu[0];
 904         netdev->max_mtu = fjes_support_mtu[3];
 905         netdev->features |= NETIF_F_HW_VLAN_CTAG_FILTER;
 906 }
 907
 908 static int fjes_rxframe_search_exist(struct fjes_adapter *adapter,
 909                                      int start_epid)
 910 {
 911         struct fjes_hw *hw = &adapter->hw;
 912         enum ep_partner_status pstatus;
 913         int max_epid, cur_epid;
 914         int i;
 915
 916         max_epid = hw->max_epid;
 917         start_epid = (start_epid + 1 + max_epid) % max_epid;
 918
 919         for (i = 0; i < max_epid; i++) {
 920                 cur_epid = (start_epid + i) % max_epid;
 921                 if (cur_epid == hw->my_epid)
 922                         continue;
 923
 924                 pstatus = fjes_hw_get_partner_ep_status(hw, cur_epid);
 925                 if (pstatus == EP_PARTNER_SHARED) {
 926                         if (!fjes_hw_epbuf_rx_is_empty(
 927                                 &hw->ep_shm_info[cur_epid].rx))
 928                                 return cur_epid;
 929                 }
 930         }
 931         return -1;
 932 }
 933
 934 static void *fjes_rxframe_get(struct fjes_adapter *adapter, size_t *psize,
 935                               int *cur_epid)
 936 {
 937         void *frame;
 938
 939         *cur_epid = fjes_rxframe_search_exist(adapter, *cur_epid);
 940         if (*cur_epid < 0)
 941                 return NULL;
 942
 943         frame =
 944         fjes_hw_epbuf_rx_curpkt_get_addr(
 945                 &adapter->hw.ep_shm_info[*cur_epid].rx, psize);
 946
 947         return frame;
 948 }
 949
 950 static void fjes_rxframe_release(struct fjes_adapter *adapter, int cur_epid)
 951 {
 952         fjes_hw_epbuf_rx_curpkt_drop(&adapter->hw.ep_shm_info[cur_epid].rx);
 953 }
 954
 955 static int fjes_poll(struct napi_struct *napi, int budget)
 956 {
 957         struct fjes_adapter *adapter =
 958                         container_of(napi, struct fjes_adapter, napi);
 959         struct net_device *netdev = napi->dev;
 960         struct fjes_hw *hw = &adapter->hw;
 961         struct sk_buff *skb;
 962         int work_done = 0;
 963         int cur_epid = 0;
 964         int epidx;
 965         size_t frame_len;
 966         void *frame;
 967
 968         spin_lock(&hw->rx_status_lock);
 969         for (epidx = 0; epidx < hw->max_epid; epidx++) {
 970                 if (epidx == hw->my_epid)
 971                         continue;
 972
 973                 if (fjes_hw_get_partner_ep_status(hw, epidx) ==
 974                     EP_PARTNER_SHARED)
 975                         adapter->hw.ep_shm_info[epidx]
 976                                    .tx.info->v1i.rx_status |= FJES_RX_POLL_WORK;
 977         }
 978         spin_unlock(&hw->rx_status_lock);
 979
 980         while (work_done < budget) {
 981                 prefetch(&adapter->hw);
 982                 frame = fjes_rxframe_get(adapter, &frame_len, &cur_epid);
 983
 984                 if (frame) {
 985                         skb = napi_alloc_skb(napi, frame_len);
 986                         if (!skb) {
 987                                 adapter->stats64.rx_dropped += 1;
 988                                 hw->ep_shm_info[cur_epid].net_stats
 989                                                          .rx_dropped += 1;
 990                                 adapter->stats64.rx_errors += 1;
 991                                 hw->ep_shm_info[cur_epid].net_stats
 992                                                          .rx_errors += 1;
 993                         } else {
 994                                 skb_put_data(skb, frame, frame_len);
 995                                 skb->protocol = eth_type_trans(skb, netdev);
 996                                 skb->ip_summed = CHECKSUM_UNNECESSARY;
 997
 998                                 netif_receive_skb(skb);
 999
1000                                 work_done++;
1001
1002                                 adapter->stats64.rx_packets += 1;
1003                                 hw->ep_shm_info[cur_epid].net_stats
1004                                                          .rx_packets += 1;
1005                                 adapter->stats64.rx_bytes += frame_len;
1006                                 hw->ep_shm_info[cur_epid].net_stats
1007                                                          .rx_bytes += frame_len;
1008
1009                                 if (is_multicast_ether_addr(
1010                                         ((struct ethhdr *)frame)->h_dest)) {
1011                                         adapter->stats64.multicast += 1;
1012                                         hw->ep_shm_info[cur_epid].net_stats
1013                                                                  .multicast += 1;
1014                                 }
1015                         }
1016
1017                         fjes_rxframe_release(adapter, cur_epid);
1018                         adapter->unset_rx_last = true;
1019                 } else {
1020                         break;
1021                 }
1022         }
1023
1024         if (work_done < budget) {
1025                 napi_complete_done(napi, work_done);
1026
1027                 if (adapter->unset_rx_last) {
1028                         adapter->rx_last_jiffies = jiffies;
1029                         adapter->unset_rx_last = false;
1030                 }
1031
1032                 if (((long)jiffies - (long)adapter->rx_last_jiffies) < 3) {
1033                         napi_reschedule(napi);
1034                 } else {
1035                         spin_lock(&hw->rx_status_lock);
1036                         for (epidx = 0; epidx < hw->max_epid; epidx++) {
1037                                 if (epidx == hw->my_epid)
1038                                         continue;
1039                                 if (fjes_hw_get_partner_ep_status(hw, epidx) ==
1040                                     EP_PARTNER_SHARED)
1041                                         adapter->hw.ep_shm_info[epidx].tx
1042                                                    .info->v1i.rx_status &=
1043                                                 ~FJES_RX_POLL_WORK;
1044                         }
1045                         spin_unlock(&hw->rx_status_lock);
1046
1047                         fjes_hw_set_irqmask(hw, REG_ICTL_MASK_RX_DATA, false);
1048                 }
1049         }
1050
1051         return work_done;
1052 }
1053
1054 static int fjes_sw_init(struct fjes_adapter *adapter)
1055 {
1056         struct net_device *netdev = adapter->netdev;
1057
1058         netif_napi_add(netdev, &adapter->napi, fjes_poll);
1059
1060         return 0;
1061 }
1062
1063 static void fjes_force_close_task(struct work_struct *work)
1064 {
1065         struct fjes_adapter *adapter = container_of(work,
1066                         struct fjes_adapter, force_close_task);
1067         struct net_device *netdev = adapter->netdev;
1068
1069         rtnl_lock();
1070         dev_close(netdev);
1071         rtnl_unlock();
1072 }
1073
1074 static void fjes_tx_stall_task(struct work_struct *work)
1075 {
1076         struct fjes_adapter *adapter = container_of(work,
1077                         struct fjes_adapter, tx_stall_task);
1078         struct net_device *netdev = adapter->netdev;
1079         struct fjes_hw *hw = &adapter->hw;
1080         int all_queue_available, sendable;
1081         enum ep_partner_status pstatus;
1082         int max_epid, my_epid, epid;
1083         union ep_buffer_info *info;
1084         int i;
1085
1086         if (((long)jiffies -
1087                 dev_trans_start(netdev)) > FJES_TX_TX_STALL_TIMEOUT) {
1088                 netif_wake_queue(netdev);
1089                 return;
1090         }
1091
1092         my_epid = hw->my_epid;
1093         max_epid = hw->max_epid;
1094
1095         for (i = 0; i < 5; i++) {
1096                 all_queue_available = 1;
1097
1098                 for (epid = 0; epid < max_epid; epid++) {
1099                         if (my_epid == epid)
1100                                 continue;
1101
1102                         pstatus = fjes_hw_get_partner_ep_status(hw, epid);
1103                         sendable = (pstatus == EP_PARTNER_SHARED);
1104                         if (!sendable)
1105                                 continue;
1106
1107                         info = adapter->hw.ep_shm_info[epid].tx.info;
1108
1109                         if (!(info->v1i.rx_status & FJES_RX_MTU_CHANGING_DONE))
1110                                 return;
1111
1112                         if (EP_RING_FULL(info->v1i.head, info->v1i.tail,
1113                                          info->v1i.count_max)) {
1114                                 all_queue_available = 0;
1115                                 break;
1116                         }
1117                 }
1118
1119                 if (all_queue_available) {
1120                         netif_wake_queue(netdev);
1121                         return;
1122                 }
1123         }
1124
1125         usleep_range(50, 100);
1126
1127         queue_work(adapter->txrx_wq, &adapter->tx_stall_task);
1128 }
1129
1130 static void fjes_raise_intr_rxdata_task(struct work_struct *work)
1131 {
1132         struct fjes_adapter *adapter = container_of(work,
1133                         struct fjes_adapter, raise_intr_rxdata_task);
1134         struct fjes_hw *hw = &adapter->hw;
1135         enum ep_partner_status pstatus;
1136         int max_epid, my_epid, epid;
1137
1138         my_epid = hw->my_epid;
1139         max_epid = hw->max_epid;
1140
1141         for (epid = 0; epid < max_epid; epid++)
1142                 hw->ep_shm_info[epid].tx_status_work = 0;
1143
1144         for (epid = 0; epid < max_epid; epid++) {
1145                 if (epid == my_epid)
1146                         continue;
1147
1148                 pstatus = fjes_hw_get_partner_ep_status(hw, epid);
1149                 if (pstatus == EP_PARTNER_SHARED) {
1150                         hw->ep_shm_info[epid].tx_status_work =
1151                                 hw->ep_shm_info[epid].tx.info->v1i.tx_status;
1152
1153                         if (hw->ep_shm_info[epid].tx_status_work ==
1154                                 FJES_TX_DELAY_SEND_PENDING) {
1155                                 hw->ep_shm_info[epid].tx.info->v1i.tx_status =
1156                                         FJES_TX_DELAY_SEND_NONE;
1157                         }
1158                 }
1159         }
1160
1161         for (epid = 0; epid < max_epid; epid++) {
1162                 if (epid == my_epid)
1163                         continue;
1164
1165                 pstatus = fjes_hw_get_partner_ep_status(hw, epid);
1166                 if ((hw->ep_shm_info[epid].tx_status_work ==
1167                      FJES_TX_DELAY_SEND_PENDING) &&
1168                     (pstatus == EP_PARTNER_SHARED) &&
1169                     !(hw->ep_shm_info[epid].rx.info->v1i.rx_status &
1170                       FJES_RX_POLL_WORK)) {
1171                         fjes_hw_raise_interrupt(hw, epid,
1172                                                 REG_ICTL_MASK_RX_DATA);
1173                         hw->ep_shm_info[epid].ep_stats.send_intr_rx += 1;
1174                 }
1175         }
1176
1177         usleep_range(500, 1000);
1178 }
1179
1180 static void fjes_watch_unshare_task(struct work_struct *work)
1181 {
1182         struct fjes_adapter *adapter =
1183         container_of(work, struct fjes_adapter, unshare_watch_task);
1184
1185         struct net_device *netdev = adapter->netdev;
1186         struct fjes_hw *hw = &adapter->hw;
1187
1188         int unshare_watch, unshare_reserve;
1189         int max_epid, my_epid, epidx;
1190         int stop_req, stop_req_done;
1191         ulong unshare_watch_bitmask;
1192         unsigned long flags;
1193         int wait_time = 0;
1194         int is_shared;
1195         int ret;
1196
1197         my_epid = hw->my_epid;
1198         max_epid = hw->max_epid;
1199
1200         unshare_watch_bitmask = adapter->unshare_watch_bitmask;
1201         adapter->unshare_watch_bitmask = 0;
1202
1203         while ((unshare_watch_bitmask || hw->txrx_stop_req_bit) &&
1204                (wait_time < 3000)) {
1205                 for (epidx = 0; epidx < max_epid; epidx++) {
1206                         if (epidx == my_epid)
1207                                 continue;
1208
1209                         is_shared = fjes_hw_epid_is_shared(hw->hw_info.share,
1210                                                            epidx);
1211
1212                         stop_req = test_bit(epidx, &hw->txrx_stop_req_bit);
1213
1214                         stop_req_done = hw->ep_shm_info[epidx].rx.info->v1i.rx_status &
1215                                         FJES_RX_STOP_REQ_DONE;
1216
1217                         unshare_watch = test_bit(epidx, &unshare_watch_bitmask);
1218
1219                         unshare_reserve = test_bit(epidx,
1220                                                    &hw->hw_info.buffer_unshare_reserve_bit);
1221
1222                         if ((!stop_req ||
1223                              (is_shared && (!is_shared || !stop_req_done))) &&
1224                             (is_shared || !unshare_watch || !unshare_reserve))
1225                                 continue;
1226
1227                         mutex_lock(&hw->hw_info.lock);
1228                         ret = fjes_hw_unregister_buff_addr(hw, epidx);
1229                         switch (ret) {
1230                         case 0:
1231                                 break;
1232                         case -ENOMSG:
1233                         case -EBUSY:
1234                         default:
1235                                 if (!work_pending(
1236                                         &adapter->force_close_task)) {
1237                                         adapter->force_reset = true;
1238                                         schedule_work(
1239                                                 &adapter->force_close_task);
1240                                 }
1241                                 break;
1242                         }
1243                         mutex_unlock(&hw->hw_info.lock);
1244                         hw->ep_shm_info[epidx].ep_stats
1245                                         .com_unregist_buf_exec += 1;
1246
1247                         spin_lock_irqsave(&hw->rx_status_lock, flags);
1248                         fjes_hw_setup_epbuf(&hw->ep_shm_info[epidx].tx,
1249                                             netdev->dev_addr, netdev->mtu);
1250                         spin_unlock_irqrestore(&hw->rx_status_lock, flags);
1251
1252                         clear_bit(epidx, &hw->txrx_stop_req_bit);
1253                         clear_bit(epidx, &unshare_watch_bitmask);
1254                         clear_bit(epidx,
1255                                   &hw->hw_info.buffer_unshare_reserve_bit);
1256                 }
1257
1258                 msleep(100);
1259                 wait_time += 100;
1260         }
1261
1262         if (hw->hw_info.buffer_unshare_reserve_bit) {
1263                 for (epidx = 0; epidx < max_epid; epidx++) {
1264                         if (epidx == my_epid)
1265                                 continue;
1266
1267                         if (test_bit(epidx,
1268                                      &hw->hw_info.buffer_unshare_reserve_bit)) {
1269                                 mutex_lock(&hw->hw_info.lock);
1270
1271                                 ret = fjes_hw_unregister_buff_addr(hw, epidx);
1272                                 switch (ret) {
1273                                 case 0:
1274                                         break;
1275                                 case -ENOMSG:
1276                                 case -EBUSY:
1277                                 default:
1278                                         if (!work_pending(
1279                                                 &adapter->force_close_task)) {
1280                                                 adapter->force_reset = true;
1281                                                 schedule_work(
1282                                                         &adapter->force_close_task);
1283                                         }
1284                                         break;
1285                                 }
1286                                 mutex_unlock(&hw->hw_info.lock);
1287
1288                                 hw->ep_shm_info[epidx].ep_stats
1289                                         .com_unregist_buf_exec += 1;
1290
1291                                 spin_lock_irqsave(&hw->rx_status_lock, flags);
1292                                 fjes_hw_setup_epbuf(
1293                                         &hw->ep_shm_info[epidx].tx,
1294                                         netdev->dev_addr, netdev->mtu);
1295                                 spin_unlock_irqrestore(&hw->rx_status_lock,
1296                                                        flags);
1297
1298                                 clear_bit(epidx, &hw->txrx_stop_req_bit);
1299                                 clear_bit(epidx, &unshare_watch_bitmask);
1300                                 clear_bit(epidx, &hw->hw_info.buffer_unshare_reserve_bit);
1301                         }
1302
1303                         if (test_bit(epidx, &unshare_watch_bitmask)) {
1304                                 spin_lock_irqsave(&hw->rx_status_lock, flags);
1305                                 hw->ep_shm_info[epidx].tx.info->v1i.rx_status &=
1306                                                 ~FJES_RX_STOP_REQ_DONE;
1307                                 spin_unlock_irqrestore(&hw->rx_status_lock,
1308                                                        flags);
1309                         }
1310                 }
1311         }
1312 }
1313
1314 static void fjes_irq_watch_task(struct work_struct *work)
1315 {
1316         struct fjes_adapter *adapter = container_of(to_delayed_work(work),
1317                         struct fjes_adapter, interrupt_watch_task);
1318
1319         local_irq_disable();
1320         fjes_intr(adapter->hw.hw_res.irq, adapter);
1321         local_irq_enable();
1322
1323         if (fjes_rxframe_search_exist(adapter, 0) >= 0)
1324                 napi_schedule(&adapter->napi);
1325
1326         if (adapter->interrupt_watch_enable) {
1327                 if (!delayed_work_pending(&adapter->interrupt_watch_task))
1328                         queue_delayed_work(adapter->control_wq,
1329                                            &adapter->interrupt_watch_task,
1330                                            FJES_IRQ_WATCH_DELAY);
1331         }
1332 }
1333
1334 /* fjes_probe - Device Initialization Routine */
1335 static int fjes_probe(struct platform_device *plat_dev)
1336 {
1337         struct fjes_adapter *adapter;
1338         struct net_device *netdev;
1339         struct resource *res;
1340         struct fjes_hw *hw;
1341         u8 addr[ETH_ALEN];
1342         int err;
1343
1344         err = -ENOMEM;
1345         netdev = alloc_netdev_mq(sizeof(struct fjes_adapter), "es%d",
1346                                  NET_NAME_UNKNOWN, fjes_netdev_setup,
1347                                  FJES_MAX_QUEUES);
1348
1349         if (!netdev)
1350                 goto err_out;
1351
1352         SET_NETDEV_DEV(netdev, &plat_dev->dev);
1353
1354         dev_set_drvdata(&plat_dev->dev, netdev);
1355         adapter = netdev_priv(netdev);
1356         adapter->netdev = netdev;
1357         adapter->plat_dev = plat_dev;
1358         hw = &adapter->hw;
1359         hw->back = adapter;
1360
1361         /* setup the private structure */
1362         err = fjes_sw_init(adapter);
1363         if (err)
1364                 goto err_free_netdev;
1365
1366         INIT_WORK(&adapter->force_close_task, fjes_force_close_task);
1367         adapter->force_reset = false;
1368         adapter->open_guard = false;
1369
1370         adapter->txrx_wq = alloc_workqueue(DRV_NAME "/txrx", WQ_MEM_RECLAIM, 0);
1371         if (unlikely(!adapter->txrx_wq)) {
1372                 err = -ENOMEM;
1373                 goto err_free_netdev;
1374         }
1375
1376         adapter->control_wq = alloc_workqueue(DRV_NAME "/control",
1377                                               WQ_MEM_RECLAIM, 0);
1378         if (unlikely(!adapter->control_wq)) {
1379                 err = -ENOMEM;
1380                 goto err_free_txrx_wq;
1381         }
1382
1383         INIT_WORK(&adapter->tx_stall_task, fjes_tx_stall_task);
1384         INIT_WORK(&adapter->raise_intr_rxdata_task,
1385                   fjes_raise_intr_rxdata_task);
1386         INIT_WORK(&adapter->unshare_watch_task, fjes_watch_unshare_task);
1387         adapter->unshare_watch_bitmask = 0;
1388
1389         INIT_DELAYED_WORK(&adapter->interrupt_watch_task, fjes_irq_watch_task);
1390         adapter->interrupt_watch_enable = false;
1391
1392         res = platform_get_resource(plat_dev, IORESOURCE_MEM, 0);
1393         if (!res) {
1394                 err = -EINVAL;
1395                 goto err_free_control_wq;
1396         }
1397         hw->hw_res.start = res->start;
1398         hw->hw_res.size = resource_size(res);
1399         hw->hw_res.irq = platform_get_irq(plat_dev, 0);
1400         if (hw->hw_res.irq < 0) {
1401                 err = hw->hw_res.irq;
1402                 goto err_free_control_wq;
1403         }
1404
1405         err = fjes_hw_init(&adapter->hw);
1406         if (err)
1407                 goto err_free_control_wq;
1408
1409         /* setup MAC address (02:00:00:00:00:[epid])*/
1410         addr[0] = 2;
1411         addr[1] = 0;
1412         addr[2] = 0;
1413         addr[3] = 0;
1414         addr[4] = 0;
1415         addr[5] = hw->my_epid; /* EPID */
1416         eth_hw_addr_set(netdev, addr);
1417
1418         err = register_netdev(netdev);
1419         if (err)
1420                 goto err_hw_exit;
1421
1422         netif_carrier_off(netdev);
1423
1424         fjes_dbg_adapter_init(adapter);
1425
1426         return 0;
1427
1428 err_hw_exit:
1429         fjes_hw_exit(&adapter->hw);
1430 err_free_control_wq:
1431         destroy_workqueue(adapter->control_wq);
1432 err_free_txrx_wq:
1433         destroy_workqueue(adapter->txrx_wq);
1434 err_free_netdev:
1435         free_netdev(netdev);
1436 err_out:
1437         return err;
1438 }
1439
1440 /* fjes_remove - Device Removal Routine */
1441 static int fjes_remove(struct platform_device *plat_dev)
1442 {
1443         struct net_device *netdev = dev_get_drvdata(&plat_dev->dev);
1444         struct fjes_adapter *adapter = netdev_priv(netdev);
1445         struct fjes_hw *hw = &adapter->hw;
1446
1447         fjes_dbg_adapter_exit(adapter);
1448
1449         cancel_delayed_work_sync(&adapter->interrupt_watch_task);
1450         cancel_work_sync(&adapter->unshare_watch_task);
1451         cancel_work_sync(&adapter->raise_intr_rxdata_task);
1452         cancel_work_sync(&adapter->tx_stall_task);
1453         if (adapter->control_wq)
1454                 destroy_workqueue(adapter->control_wq);
1455         if (adapter->txrx_wq)
1456                 destroy_workqueue(adapter->txrx_wq);
1457
1458         unregister_netdev(netdev);
1459
1460         fjes_hw_exit(hw);
1461
1462         netif_napi_del(&adapter->napi);
1463
1464         free_netdev(netdev);
1465
1466         return 0;
1467 }
1468
1469 static struct platform_driver fjes_driver = {
1470         .driver = {
1471                 .name = DRV_NAME,
1472         },
1473         .probe = fjes_probe,
1474         .remove = fjes_remove,
1475 };
1476
1477 static acpi_status
1478 acpi_find_extended_socket_device(acpi_handle obj_handle, u32 level,
1479                                  void *context, void **return_value)
1480 {
1481         struct acpi_device *device;
1482         bool *found = context;
1483
1484         device = acpi_fetch_acpi_dev(obj_handle);
1485         if (!device)
1486                 return AE_OK;
1487
1488         if (strcmp(acpi_device_hid(device), ACPI_MOTHERBOARD_RESOURCE_HID))
1489                 return AE_OK;
1490
1491         if (!is_extended_socket_device(device))
1492                 return AE_OK;
1493
1494         if (acpi_check_extended_socket_status(device))
1495                 return AE_OK;
1496
1497         *found = true;
1498         return AE_CTRL_TERMINATE;
1499 }
1500
1501 /* fjes_init_module - Driver Registration Routine */
1502 static int __init fjes_init_module(void)
1503 {
1504         bool found = false;
1505         int result;
1506
1507         acpi_walk_namespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT, ACPI_UINT32_MAX,
1508                             acpi_find_extended_socket_device, NULL, &found,
1509                             NULL);
1510
1511         if (!found)
1512                 return -ENODEV;
1513
1514         pr_info("%s - version %s - %s\n",
1515                 fjes_driver_string, fjes_driver_version, fjes_copyright);
1516
1517         fjes_dbg_init();
1518
1519         result = platform_driver_register(&fjes_driver);
1520         if (result < 0) {
1521                 fjes_dbg_exit();
1522                 return result;
1523         }
1524
1525         result = acpi_bus_register_driver(&fjes_acpi_driver);
1526         if (result < 0)
1527                 goto fail_acpi_driver;
1528
1529         return 0;
1530
1531 fail_acpi_driver:
1532         platform_driver_unregister(&fjes_driver);
1533         fjes_dbg_exit();
1534         return result;
1535 }
1536
1537 module_init(fjes_init_module);
1538
1539 /* fjes_exit_module - Driver Exit Cleanup Routine */
1540 static void __exit fjes_exit_module(void)
1541 {
1542         acpi_bus_unregister_driver(&fjes_acpi_driver);
1543         platform_driver_unregister(&fjes_driver);
1544         fjes_dbg_exit();
1545 }
1546
1547 module_exit(fjes_exit_module);