drivers/net/fjes/fjes_hw.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 "fjes_hw.h"
   8 #include "fjes.h"
   9 #include "fjes_trace.h"
  10
  11 static void fjes_hw_update_zone_task(struct work_struct *);
  12 static void fjes_hw_epstop_task(struct work_struct *);
  13
  14 /* supported MTU list */
  15 const u32 fjes_support_mtu[] = {
  16         FJES_MTU_DEFINE(8 * 1024),
  17         FJES_MTU_DEFINE(16 * 1024),
  18         FJES_MTU_DEFINE(32 * 1024),
  19         FJES_MTU_DEFINE(64 * 1024),
  20         0
  21 };
  22
  23 u32 fjes_hw_rd32(struct fjes_hw *hw, u32 reg)
  24 {
  25         u8 *base = hw->base;
  26         u32 value = 0;
  27
  28         value = readl(&base[reg]);
  29
  30         return value;
  31 }
  32
  33 static u8 *fjes_hw_iomap(struct fjes_hw *hw)
  34 {
  35         u8 *base;
  36
  37         if (!request_mem_region(hw->hw_res.start, hw->hw_res.size,
  38                                 fjes_driver_name)) {
  39                 pr_err("request_mem_region failed\n");
  40                 return NULL;
  41         }
  42
  43         base = (u8 *)ioremap(hw->hw_res.start, hw->hw_res.size);
  44
  45         return base;
  46 }
  47
  48 static void fjes_hw_iounmap(struct fjes_hw *hw)
  49 {
  50         iounmap(hw->base);
  51         release_mem_region(hw->hw_res.start, hw->hw_res.size);
  52 }
  53
  54 int fjes_hw_reset(struct fjes_hw *hw)
  55 {
  56         union REG_DCTL dctl;
  57         int timeout;
  58
  59         dctl.reg = 0;
  60         dctl.bits.reset = 1;
  61         wr32(XSCT_DCTL, dctl.reg);
  62
  63         timeout = FJES_DEVICE_RESET_TIMEOUT * 1000;
  64         dctl.reg = rd32(XSCT_DCTL);
  65         while ((dctl.bits.reset == 1) && (timeout > 0)) {
  66                 msleep(1000);
  67                 dctl.reg = rd32(XSCT_DCTL);
  68                 timeout -= 1000;
  69         }
  70
  71         return timeout > 0 ? 0 : -EIO;
  72 }
  73
  74 static int fjes_hw_get_max_epid(struct fjes_hw *hw)
  75 {
  76         union REG_MAX_EP info;
  77
  78         info.reg = rd32(XSCT_MAX_EP);
  79
  80         return info.bits.maxep;
  81 }
  82
  83 static int fjes_hw_get_my_epid(struct fjes_hw *hw)
  84 {
  85         union REG_OWNER_EPID info;
  86
  87         info.reg = rd32(XSCT_OWNER_EPID);
  88
  89         return info.bits.epid;
  90 }
  91
  92 static int fjes_hw_alloc_shared_status_region(struct fjes_hw *hw)
  93 {
  94         size_t size;
  95
  96         size = sizeof(struct fjes_device_shared_info) +
  97             (sizeof(u8) * hw->max_epid);
  98         hw->hw_info.share = kzalloc(size, GFP_KERNEL);
  99         if (!hw->hw_info.share)
 100                 return -ENOMEM;
 101
 102         hw->hw_info.share->epnum = hw->max_epid;
 103
 104         return 0;
 105 }
 106
 107 static void fjes_hw_free_shared_status_region(struct fjes_hw *hw)
 108 {
 109         kfree(hw->hw_info.share);
 110         hw->hw_info.share = NULL;
 111 }
 112
 113 static int fjes_hw_alloc_epbuf(struct epbuf_handler *epbh)
 114 {
 115         void *mem;
 116
 117         mem = vzalloc(EP_BUFFER_SIZE);
 118         if (!mem)
 119                 return -ENOMEM;
 120
 121         epbh->buffer = mem;
 122         epbh->size = EP_BUFFER_SIZE;
 123
 124         epbh->info = (union ep_buffer_info *)mem;
 125         epbh->ring = (u8 *)(mem + sizeof(union ep_buffer_info));
 126
 127         return 0;
 128 }
 129
 130 static void fjes_hw_free_epbuf(struct epbuf_handler *epbh)
 131 {
 132         vfree(epbh->buffer);
 133         epbh->buffer = NULL;
 134         epbh->size = 0;
 135
 136         epbh->info = NULL;
 137         epbh->ring = NULL;
 138 }
 139
 140 void fjes_hw_setup_epbuf(struct epbuf_handler *epbh, const u8 *mac_addr,
 141                          u32 mtu)
 142 {
 143         union ep_buffer_info *info = epbh->info;
 144         u16 vlan_id[EP_BUFFER_SUPPORT_VLAN_MAX];
 145         int i;
 146
 147         for (i = 0; i < EP_BUFFER_SUPPORT_VLAN_MAX; i++)
 148                 vlan_id[i] = info->v1i.vlan_id[i];
 149
 150         memset(info, 0, sizeof(union ep_buffer_info));
 151
 152         info->v1i.version = 0;  /* version 0 */
 153
 154         for (i = 0; i < ETH_ALEN; i++)
 155                 info->v1i.mac_addr[i] = mac_addr[i];
 156
 157         info->v1i.head = 0;
 158         info->v1i.tail = 1;
 159
 160         info->v1i.info_size = sizeof(union ep_buffer_info);
 161         info->v1i.buffer_size = epbh->size - info->v1i.info_size;
 162
 163         info->v1i.frame_max = FJES_MTU_TO_FRAME_SIZE(mtu);
 164         info->v1i.count_max =
 165             EP_RING_NUM(info->v1i.buffer_size, info->v1i.frame_max);
 166
 167         for (i = 0; i < EP_BUFFER_SUPPORT_VLAN_MAX; i++)
 168                 info->v1i.vlan_id[i] = vlan_id[i];
 169
 170         info->v1i.rx_status |= FJES_RX_MTU_CHANGING_DONE;
 171 }
 172
 173 void
 174 fjes_hw_init_command_registers(struct fjes_hw *hw,
 175                                struct fjes_device_command_param *param)
 176 {
 177         /* Request Buffer length */
 178         wr32(XSCT_REQBL, (__le32)(param->req_len));
 179         /* Response Buffer Length */
 180         wr32(XSCT_RESPBL, (__le32)(param->res_len));
 181
 182         /* Request Buffer Address */
 183         wr32(XSCT_REQBAL,
 184              (__le32)(param->req_start & GENMASK_ULL(31, 0)));
 185         wr32(XSCT_REQBAH,
 186              (__le32)((param->req_start & GENMASK_ULL(63, 32)) >> 32));
 187
 188         /* Response Buffer Address */
 189         wr32(XSCT_RESPBAL,
 190              (__le32)(param->res_start & GENMASK_ULL(31, 0)));
 191         wr32(XSCT_RESPBAH,
 192              (__le32)((param->res_start & GENMASK_ULL(63, 32)) >> 32));
 193
 194         /* Share status address */
 195         wr32(XSCT_SHSTSAL,
 196              (__le32)(param->share_start & GENMASK_ULL(31, 0)));
 197         wr32(XSCT_SHSTSAH,
 198              (__le32)((param->share_start & GENMASK_ULL(63, 32)) >> 32));
 199 }
 200
 201 static int fjes_hw_setup(struct fjes_hw *hw)
 202 {
 203         u8 mac[ETH_ALEN] = { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
 204         struct fjes_device_command_param param;
 205         struct ep_share_mem_info *buf_pair;
 206         unsigned long flags;
 207         size_t mem_size;
 208         int result;
 209         int epidx;
 210         void *buf;
 211
 212         hw->hw_info.max_epid = &hw->max_epid;
 213         hw->hw_info.my_epid = &hw->my_epid;
 214
 215         buf = kcalloc(hw->max_epid, sizeof(struct ep_share_mem_info),
 216                       GFP_KERNEL);
 217         if (!buf)
 218                 return -ENOMEM;
 219
 220         hw->ep_shm_info = (struct ep_share_mem_info *)buf;
 221
 222         mem_size = FJES_DEV_REQ_BUF_SIZE(hw->max_epid);
 223         hw->hw_info.req_buf = kzalloc(mem_size, GFP_KERNEL);
 224         if (!(hw->hw_info.req_buf)) {
 225                 result = -ENOMEM;
 226                 goto free_ep_info;
 227         }
 228
 229         hw->hw_info.req_buf_size = mem_size;
 230
 231         mem_size = FJES_DEV_RES_BUF_SIZE(hw->max_epid);
 232         hw->hw_info.res_buf = kzalloc(mem_size, GFP_KERNEL);
 233         if (!(hw->hw_info.res_buf)) {
 234                 result = -ENOMEM;
 235                 goto free_req_buf;
 236         }
 237
 238         hw->hw_info.res_buf_size = mem_size;
 239
 240         result = fjes_hw_alloc_shared_status_region(hw);
 241         if (result)
 242                 goto free_res_buf;
 243
 244         hw->hw_info.buffer_share_bit = 0;
 245         hw->hw_info.buffer_unshare_reserve_bit = 0;
 246
 247         for (epidx = 0; epidx < hw->max_epid; epidx++) {
 248                 if (epidx != hw->my_epid) {
 249                         buf_pair = &hw->ep_shm_info[epidx];
 250
 251                         result = fjes_hw_alloc_epbuf(&buf_pair->tx);
 252                         if (result)
 253                                 goto free_epbuf;
 254
 255                         result = fjes_hw_alloc_epbuf(&buf_pair->rx);
 256                         if (result)
 257                                 goto free_epbuf;
 258
 259                         spin_lock_irqsave(&hw->rx_status_lock, flags);
 260                         fjes_hw_setup_epbuf(&buf_pair->tx, mac,
 261                                             fjes_support_mtu[0]);
 262                         fjes_hw_setup_epbuf(&buf_pair->rx, mac,
 263                                             fjes_support_mtu[0]);
 264                         spin_unlock_irqrestore(&hw->rx_status_lock, flags);
 265                 }
 266         }
 267
 268         memset(&param, 0, sizeof(param));
 269
 270         param.req_len = hw->hw_info.req_buf_size;
 271         param.req_start = __pa(hw->hw_info.req_buf);
 272         param.res_len = hw->hw_info.res_buf_size;
 273         param.res_start = __pa(hw->hw_info.res_buf);
 274
 275         param.share_start = __pa(hw->hw_info.share->ep_status);
 276
 277         fjes_hw_init_command_registers(hw, &param);
 278
 279         return 0;
 280
 281 free_epbuf:
 282         for (epidx = 0; epidx < hw->max_epid ; epidx++) {
 283                 if (epidx == hw->my_epid)
 284                         continue;
 285                 fjes_hw_free_epbuf(&hw->ep_shm_info[epidx].tx);
 286                 fjes_hw_free_epbuf(&hw->ep_shm_info[epidx].rx);
 287         }
 288         fjes_hw_free_shared_status_region(hw);
 289 free_res_buf:
 290         kfree(hw->hw_info.res_buf);
 291         hw->hw_info.res_buf = NULL;
 292 free_req_buf:
 293         kfree(hw->hw_info.req_buf);
 294         hw->hw_info.req_buf = NULL;
 295 free_ep_info:
 296         kfree(hw->ep_shm_info);
 297         hw->ep_shm_info = NULL;
 298         return result;
 299 }
 300
 301 static void fjes_hw_cleanup(struct fjes_hw *hw)
 302 {
 303         int epidx;
 304
 305         if (!hw->ep_shm_info)
 306                 return;
 307
 308         fjes_hw_free_shared_status_region(hw);
 309
 310         kfree(hw->hw_info.req_buf);
 311         hw->hw_info.req_buf = NULL;
 312
 313         kfree(hw->hw_info.res_buf);
 314         hw->hw_info.res_buf = NULL;
 315
 316         for (epidx = 0; epidx < hw->max_epid ; epidx++) {
 317                 if (epidx == hw->my_epid)
 318                         continue;
 319                 fjes_hw_free_epbuf(&hw->ep_shm_info[epidx].tx);
 320                 fjes_hw_free_epbuf(&hw->ep_shm_info[epidx].rx);
 321         }
 322
 323         kfree(hw->ep_shm_info);
 324         hw->ep_shm_info = NULL;
 325 }
 326
 327 int fjes_hw_init(struct fjes_hw *hw)
 328 {
 329         int ret;
 330
 331         hw->base = fjes_hw_iomap(hw);
 332         if (!hw->base)
 333                 return -EIO;
 334
 335         ret = fjes_hw_reset(hw);
 336         if (ret)
 337                 return ret;
 338
 339         fjes_hw_set_irqmask(hw, REG_ICTL_MASK_ALL, true);
 340
 341         INIT_WORK(&hw->update_zone_task, fjes_hw_update_zone_task);
 342         INIT_WORK(&hw->epstop_task, fjes_hw_epstop_task);
 343
 344         mutex_init(&hw->hw_info.lock);
 345         spin_lock_init(&hw->rx_status_lock);
 346
 347         hw->max_epid = fjes_hw_get_max_epid(hw);
 348         hw->my_epid = fjes_hw_get_my_epid(hw);
 349
 350         if ((hw->max_epid == 0) || (hw->my_epid >= hw->max_epid))
 351                 return -ENXIO;
 352
 353         ret = fjes_hw_setup(hw);
 354
 355         hw->hw_info.trace = vzalloc(FJES_DEBUG_BUFFER_SIZE);
 356         hw->hw_info.trace_size = FJES_DEBUG_BUFFER_SIZE;
 357
 358         return ret;
 359 }
 360
 361 void fjes_hw_exit(struct fjes_hw *hw)
 362 {
 363         int ret;
 364
 365         if (hw->base) {
 366
 367                 if (hw->debug_mode) {
 368                         /* disable debug mode */
 369                         mutex_lock(&hw->hw_info.lock);
 370                         fjes_hw_stop_debug(hw);
 371                         mutex_unlock(&hw->hw_info.lock);
 372                 }
 373                 vfree(hw->hw_info.trace);
 374                 hw->hw_info.trace = NULL;
 375                 hw->hw_info.trace_size = 0;
 376                 hw->debug_mode = 0;
 377
 378                 ret = fjes_hw_reset(hw);
 379                 if (ret)
 380                         pr_err("%s: reset error", __func__);
 381
 382                 fjes_hw_iounmap(hw);
 383                 hw->base = NULL;
 384         }
 385
 386         fjes_hw_cleanup(hw);
 387
 388         cancel_work_sync(&hw->update_zone_task);
 389         cancel_work_sync(&hw->epstop_task);
 390 }
 391
 392 static enum fjes_dev_command_response_e
 393 fjes_hw_issue_request_command(struct fjes_hw *hw,
 394                               enum fjes_dev_command_request_type type)
 395 {
 396         enum fjes_dev_command_response_e ret = FJES_CMD_STATUS_UNKNOWN;
 397         union REG_CR cr;
 398         union REG_CS cs;
 399         int timeout = FJES_COMMAND_REQ_TIMEOUT * 1000;
 400
 401         cr.reg = 0;
 402         cr.bits.req_start = 1;
 403         cr.bits.req_code = type;
 404         wr32(XSCT_CR, cr.reg);
 405         cr.reg = rd32(XSCT_CR);
 406
 407         if (cr.bits.error == 0) {
 408                 timeout = FJES_COMMAND_REQ_TIMEOUT * 1000;
 409                 cs.reg = rd32(XSCT_CS);
 410
 411                 while ((cs.bits.complete != 1) && timeout > 0) {
 412                         msleep(1000);
 413                         cs.reg = rd32(XSCT_CS);
 414                         timeout -= 1000;
 415                 }
 416
 417                 if (cs.bits.complete == 1)
 418                         ret = FJES_CMD_STATUS_NORMAL;
 419                 else if (timeout <= 0)
 420                         ret = FJES_CMD_STATUS_TIMEOUT;
 421
 422         } else {
 423                 switch (cr.bits.err_info) {
 424                 case FJES_CMD_REQ_ERR_INFO_PARAM:
 425                         ret = FJES_CMD_STATUS_ERROR_PARAM;
 426                         break;
 427                 case FJES_CMD_REQ_ERR_INFO_STATUS:
 428                         ret = FJES_CMD_STATUS_ERROR_STATUS;
 429                         break;
 430                 default:
 431                         ret = FJES_CMD_STATUS_UNKNOWN;
 432                         break;
 433                 }
 434         }
 435
 436         trace_fjes_hw_issue_request_command(&cr, &cs, timeout, ret);
 437
 438         return ret;
 439 }
 440
 441 int fjes_hw_request_info(struct fjes_hw *hw)
 442 {
 443         union fjes_device_command_req *req_buf = hw->hw_info.req_buf;
 444         union fjes_device_command_res *res_buf = hw->hw_info.res_buf;
 445         enum fjes_dev_command_response_e ret;
 446         int result;
 447
 448         memset(req_buf, 0, hw->hw_info.req_buf_size);
 449         memset(res_buf, 0, hw->hw_info.res_buf_size);
 450
 451         req_buf->info.length = FJES_DEV_COMMAND_INFO_REQ_LEN;
 452
 453         res_buf->info.length = 0;
 454         res_buf->info.code = 0;
 455
 456         ret = fjes_hw_issue_request_command(hw, FJES_CMD_REQ_INFO);
 457         trace_fjes_hw_request_info(hw, res_buf);
 458
 459         result = 0;
 460
 461         if (FJES_DEV_COMMAND_INFO_RES_LEN((*hw->hw_info.max_epid)) !=
 462                 res_buf->info.length) {
 463                 trace_fjes_hw_request_info_err("Invalid res_buf");
 464                 result = -ENOMSG;
 465         } else if (ret == FJES_CMD_STATUS_NORMAL) {
 466                 switch (res_buf->info.code) {
 467                 case FJES_CMD_REQ_RES_CODE_NORMAL:
 468                         result = 0;
 469                         break;
 470                 default:
 471                         result = -EPERM;
 472                         break;
 473                 }
 474         } else {
 475                 switch (ret) {
 476                 case FJES_CMD_STATUS_UNKNOWN:
 477                         result = -EPERM;
 478                         break;
 479                 case FJES_CMD_STATUS_TIMEOUT:
 480                         trace_fjes_hw_request_info_err("Timeout");
 481                         result = -EBUSY;
 482                         break;
 483                 case FJES_CMD_STATUS_ERROR_PARAM:
 484                         result = -EPERM;
 485                         break;
 486                 case FJES_CMD_STATUS_ERROR_STATUS:
 487                         result = -EPERM;
 488                         break;
 489                 default:
 490                         result = -EPERM;
 491                         break;
 492                 }
 493         }
 494
 495         return result;
 496 }
 497
 498 int fjes_hw_register_buff_addr(struct fjes_hw *hw, int dest_epid,
 499                                struct ep_share_mem_info *buf_pair)
 500 {
 501         union fjes_device_command_req *req_buf = hw->hw_info.req_buf;
 502         union fjes_device_command_res *res_buf = hw->hw_info.res_buf;
 503         enum fjes_dev_command_response_e ret;
 504         int page_count;
 505         int timeout;
 506         int i, idx;
 507         void *addr;
 508         int result;
 509
 510         if (test_bit(dest_epid, &hw->hw_info.buffer_share_bit))
 511                 return 0;
 512
 513         memset(req_buf, 0, hw->hw_info.req_buf_size);
 514         memset(res_buf, 0, hw->hw_info.res_buf_size);
 515
 516         req_buf->share_buffer.length = FJES_DEV_COMMAND_SHARE_BUFFER_REQ_LEN(
 517                                                 buf_pair->tx.size,
 518                                                 buf_pair->rx.size);
 519         req_buf->share_buffer.epid = dest_epid;
 520
 521         idx = 0;
 522         req_buf->share_buffer.buffer[idx++] = buf_pair->tx.size;
 523         page_count = buf_pair->tx.size / EP_BUFFER_INFO_SIZE;
 524         for (i = 0; i < page_count; i++) {
 525                 addr = ((u8 *)(buf_pair->tx.buffer)) +
 526                                 (i * EP_BUFFER_INFO_SIZE);
 527                 req_buf->share_buffer.buffer[idx++] =
 528                                 (__le64)(page_to_phys(vmalloc_to_page(addr)) +
 529                                                 offset_in_page(addr));
 530         }
 531
 532         req_buf->share_buffer.buffer[idx++] = buf_pair->rx.size;
 533         page_count = buf_pair->rx.size / EP_BUFFER_INFO_SIZE;
 534         for (i = 0; i < page_count; i++) {
 535                 addr = ((u8 *)(buf_pair->rx.buffer)) +
 536                                 (i * EP_BUFFER_INFO_SIZE);
 537                 req_buf->share_buffer.buffer[idx++] =
 538                                 (__le64)(page_to_phys(vmalloc_to_page(addr)) +
 539                                                 offset_in_page(addr));
 540         }
 541
 542         res_buf->share_buffer.length = 0;
 543         res_buf->share_buffer.code = 0;
 544
 545         trace_fjes_hw_register_buff_addr_req(req_buf, buf_pair);
 546
 547         ret = fjes_hw_issue_request_command(hw, FJES_CMD_REQ_SHARE_BUFFER);
 548
 549         timeout = FJES_COMMAND_REQ_BUFF_TIMEOUT * 1000;
 550         while ((ret == FJES_CMD_STATUS_NORMAL) &&
 551                (res_buf->share_buffer.length ==
 552                 FJES_DEV_COMMAND_SHARE_BUFFER_RES_LEN) &&
 553                (res_buf->share_buffer.code == FJES_CMD_REQ_RES_CODE_BUSY) &&
 554                (timeout > 0)) {
 555                         msleep(200 + hw->my_epid * 20);
 556                         timeout -= (200 + hw->my_epid * 20);
 557
 558                         res_buf->share_buffer.length = 0;
 559                         res_buf->share_buffer.code = 0;
 560
 561                         ret = fjes_hw_issue_request_command(
 562                                         hw, FJES_CMD_REQ_SHARE_BUFFER);
 563         }
 564
 565         result = 0;
 566
 567         trace_fjes_hw_register_buff_addr(res_buf, timeout);
 568
 569         if (res_buf->share_buffer.length !=
 570                         FJES_DEV_COMMAND_SHARE_BUFFER_RES_LEN) {
 571                 trace_fjes_hw_register_buff_addr_err("Invalid res_buf");
 572                 result = -ENOMSG;
 573         } else if (ret == FJES_CMD_STATUS_NORMAL) {
 574                 switch (res_buf->share_buffer.code) {
 575                 case FJES_CMD_REQ_RES_CODE_NORMAL:
 576                         result = 0;
 577                         set_bit(dest_epid, &hw->hw_info.buffer_share_bit);
 578                         break;
 579                 case FJES_CMD_REQ_RES_CODE_BUSY:
 580                         trace_fjes_hw_register_buff_addr_err("Busy Timeout");
 581                         result = -EBUSY;
 582                         break;
 583                 default:
 584                         result = -EPERM;
 585                         break;
 586                 }
 587         } else {
 588                 switch (ret) {
 589                 case FJES_CMD_STATUS_UNKNOWN:
 590                         result = -EPERM;
 591                         break;
 592                 case FJES_CMD_STATUS_TIMEOUT:
 593                         trace_fjes_hw_register_buff_addr_err("Timeout");
 594                         result = -EBUSY;
 595                         break;
 596                 case FJES_CMD_STATUS_ERROR_PARAM:
 597                 case FJES_CMD_STATUS_ERROR_STATUS:
 598                 default:
 599                         result = -EPERM;
 600                         break;
 601                 }
 602         }
 603
 604         return result;
 605 }
 606
 607 int fjes_hw_unregister_buff_addr(struct fjes_hw *hw, int dest_epid)
 608 {
 609         union fjes_device_command_req *req_buf = hw->hw_info.req_buf;
 610         union fjes_device_command_res *res_buf = hw->hw_info.res_buf;
 611         struct fjes_device_shared_info *share = hw->hw_info.share;
 612         enum fjes_dev_command_response_e ret;
 613         int timeout;
 614         int result;
 615
 616         if (!hw->base)
 617                 return -EPERM;
 618
 619         if (!req_buf || !res_buf || !share)
 620                 return -EPERM;
 621
 622         if (!test_bit(dest_epid, &hw->hw_info.buffer_share_bit))
 623                 return 0;
 624
 625         memset(req_buf, 0, hw->hw_info.req_buf_size);
 626         memset(res_buf, 0, hw->hw_info.res_buf_size);
 627
 628         req_buf->unshare_buffer.length =
 629                         FJES_DEV_COMMAND_UNSHARE_BUFFER_REQ_LEN;
 630         req_buf->unshare_buffer.epid = dest_epid;
 631
 632         res_buf->unshare_buffer.length = 0;
 633         res_buf->unshare_buffer.code = 0;
 634
 635         trace_fjes_hw_unregister_buff_addr_req(req_buf);
 636         ret = fjes_hw_issue_request_command(hw, FJES_CMD_REQ_UNSHARE_BUFFER);
 637
 638         timeout = FJES_COMMAND_REQ_BUFF_TIMEOUT * 1000;
 639         while ((ret == FJES_CMD_STATUS_NORMAL) &&
 640                (res_buf->unshare_buffer.length ==
 641                 FJES_DEV_COMMAND_UNSHARE_BUFFER_RES_LEN) &&
 642                (res_buf->unshare_buffer.code ==
 643                 FJES_CMD_REQ_RES_CODE_BUSY) &&
 644                (timeout > 0)) {
 645                 msleep(200 + hw->my_epid * 20);
 646                 timeout -= (200 + hw->my_epid * 20);
 647
 648                 res_buf->unshare_buffer.length = 0;
 649                 res_buf->unshare_buffer.code = 0;
 650
 651                 ret =
 652                 fjes_hw_issue_request_command(hw, FJES_CMD_REQ_UNSHARE_BUFFER);
 653         }
 654
 655         result = 0;
 656
 657         trace_fjes_hw_unregister_buff_addr(res_buf, timeout);
 658
 659         if (res_buf->unshare_buffer.length !=
 660                         FJES_DEV_COMMAND_UNSHARE_BUFFER_RES_LEN) {
 661                 trace_fjes_hw_unregister_buff_addr_err("Invalid res_buf");
 662                 result = -ENOMSG;
 663         } else if (ret == FJES_CMD_STATUS_NORMAL) {
 664                 switch (res_buf->unshare_buffer.code) {
 665                 case FJES_CMD_REQ_RES_CODE_NORMAL:
 666                         result = 0;
 667                         clear_bit(dest_epid, &hw->hw_info.buffer_share_bit);
 668                         break;
 669                 case FJES_CMD_REQ_RES_CODE_BUSY:
 670                         trace_fjes_hw_unregister_buff_addr_err("Busy Timeout");
 671                         result = -EBUSY;
 672                         break;
 673                 default:
 674                         result = -EPERM;
 675                         break;
 676                 }
 677         } else {
 678                 switch (ret) {
 679                 case FJES_CMD_STATUS_UNKNOWN:
 680                         result = -EPERM;
 681                         break;
 682                 case FJES_CMD_STATUS_TIMEOUT:
 683                         trace_fjes_hw_unregister_buff_addr_err("Timeout");
 684                         result = -EBUSY;
 685                         break;
 686                 case FJES_CMD_STATUS_ERROR_PARAM:
 687                 case FJES_CMD_STATUS_ERROR_STATUS:
 688                 default:
 689                         result = -EPERM;
 690                         break;
 691                 }
 692         }
 693
 694         return result;
 695 }
 696
 697 int fjes_hw_raise_interrupt(struct fjes_hw *hw, int dest_epid,
 698                             enum REG_ICTL_MASK  mask)
 699 {
 700         u32 ig = mask | dest_epid;
 701
 702         wr32(XSCT_IG, cpu_to_le32(ig));
 703
 704         return 0;
 705 }
 706
 707 u32 fjes_hw_capture_interrupt_status(struct fjes_hw *hw)
 708 {
 709         u32 cur_is;
 710
 711         cur_is = rd32(XSCT_IS);
 712
 713         return cur_is;
 714 }
 715
 716 void fjes_hw_set_irqmask(struct fjes_hw *hw,
 717                          enum REG_ICTL_MASK intr_mask, bool mask)
 718 {
 719         if (mask)
 720                 wr32(XSCT_IMS, intr_mask);
 721         else
 722                 wr32(XSCT_IMC, intr_mask);
 723 }
 724
 725 bool fjes_hw_epid_is_same_zone(struct fjes_hw *hw, int epid)
 726 {
 727         if (epid >= hw->max_epid)
 728                 return false;
 729
 730         if ((hw->ep_shm_info[epid].es_status !=
 731                         FJES_ZONING_STATUS_ENABLE) ||
 732                 (hw->ep_shm_info[hw->my_epid].zone ==
 733                         FJES_ZONING_ZONE_TYPE_NONE))
 734                 return false;
 735         else
 736                 return (hw->ep_shm_info[epid].zone ==
 737                                 hw->ep_shm_info[hw->my_epid].zone);
 738 }
 739
 740 int fjes_hw_epid_is_shared(struct fjes_device_shared_info *share,
 741                            int dest_epid)
 742 {
 743         int value = false;
 744
 745         if (dest_epid < share->epnum)
 746                 value = share->ep_status[dest_epid];
 747
 748         return value;
 749 }
 750
 751 static bool fjes_hw_epid_is_stop_requested(struct fjes_hw *hw, int src_epid)
 752 {
 753         return test_bit(src_epid, &hw->txrx_stop_req_bit);
 754 }
 755
 756 static bool fjes_hw_epid_is_stop_process_done(struct fjes_hw *hw, int src_epid)
 757 {
 758         return (hw->ep_shm_info[src_epid].tx.info->v1i.rx_status &
 759                         FJES_RX_STOP_REQ_DONE);
 760 }
 761
 762 enum ep_partner_status
 763 fjes_hw_get_partner_ep_status(struct fjes_hw *hw, int epid)
 764 {
 765         enum ep_partner_status status;
 766
 767         if (fjes_hw_epid_is_shared(hw->hw_info.share, epid)) {
 768                 if (fjes_hw_epid_is_stop_requested(hw, epid)) {
 769                         status = EP_PARTNER_WAITING;
 770                 } else {
 771                         if (fjes_hw_epid_is_stop_process_done(hw, epid))
 772                                 status = EP_PARTNER_COMPLETE;
 773                         else
 774                                 status = EP_PARTNER_SHARED;
 775                 }
 776         } else {
 777                 status = EP_PARTNER_UNSHARE;
 778         }
 779
 780         return status;
 781 }
 782
 783 void fjes_hw_raise_epstop(struct fjes_hw *hw)
 784 {
 785         enum ep_partner_status status;
 786         unsigned long flags;
 787         int epidx;
 788
 789         for (epidx = 0; epidx < hw->max_epid; epidx++) {
 790                 if (epidx == hw->my_epid)
 791                         continue;
 792
 793                 status = fjes_hw_get_partner_ep_status(hw, epidx);
 794                 switch (status) {
 795                 case EP_PARTNER_SHARED:
 796                         fjes_hw_raise_interrupt(hw, epidx,
 797                                                 REG_ICTL_MASK_TXRX_STOP_REQ);
 798                         hw->ep_shm_info[epidx].ep_stats.send_intr_unshare += 1;
 799                         break;
 800                 default:
 801                         break;
 802                 }
 803
 804                 set_bit(epidx, &hw->hw_info.buffer_unshare_reserve_bit);
 805                 set_bit(epidx, &hw->txrx_stop_req_bit);
 806
 807                 spin_lock_irqsave(&hw->rx_status_lock, flags);
 808                 hw->ep_shm_info[epidx].tx.info->v1i.rx_status |=
 809                                 FJES_RX_STOP_REQ_REQUEST;
 810                 spin_unlock_irqrestore(&hw->rx_status_lock, flags);
 811         }
 812 }
 813
 814 int fjes_hw_wait_epstop(struct fjes_hw *hw)
 815 {
 816         enum ep_partner_status status;
 817         union ep_buffer_info *info;
 818         int wait_time = 0;
 819         int epidx;
 820
 821         while (hw->hw_info.buffer_unshare_reserve_bit &&
 822                (wait_time < FJES_COMMAND_EPSTOP_WAIT_TIMEOUT * 1000)) {
 823                 for (epidx = 0; epidx < hw->max_epid; epidx++) {
 824                         if (epidx == hw->my_epid)
 825                                 continue;
 826                         status = fjes_hw_epid_is_shared(hw->hw_info.share,
 827                                                         epidx);
 828                         info = hw->ep_shm_info[epidx].rx.info;
 829                         if ((!status ||
 830                              (info->v1i.rx_status &
 831                               FJES_RX_STOP_REQ_DONE)) &&
 832                             test_bit(epidx,
 833                                      &hw->hw_info.buffer_unshare_reserve_bit)) {
 834                                 clear_bit(epidx,
 835                                           &hw->hw_info.buffer_unshare_reserve_bit);
 836                         }
 837                 }
 838
 839                 msleep(100);
 840                 wait_time += 100;
 841         }
 842
 843         for (epidx = 0; epidx < hw->max_epid; epidx++) {
 844                 if (epidx == hw->my_epid)
 845                         continue;
 846                 if (test_bit(epidx, &hw->hw_info.buffer_unshare_reserve_bit))
 847                         clear_bit(epidx,
 848                                   &hw->hw_info.buffer_unshare_reserve_bit);
 849         }
 850
 851         return (wait_time < FJES_COMMAND_EPSTOP_WAIT_TIMEOUT * 1000)
 852                         ? 0 : -EBUSY;
 853 }
 854
 855 bool fjes_hw_check_epbuf_version(struct epbuf_handler *epbh, u32 version)
 856 {
 857         union ep_buffer_info *info = epbh->info;
 858
 859         return (info->common.version == version);
 860 }
 861
 862 bool fjes_hw_check_mtu(struct epbuf_handler *epbh, u32 mtu)
 863 {
 864         union ep_buffer_info *info = epbh->info;
 865
 866         return ((info->v1i.frame_max == FJES_MTU_TO_FRAME_SIZE(mtu)) &&
 867                 info->v1i.rx_status & FJES_RX_MTU_CHANGING_DONE);
 868 }
 869
 870 bool fjes_hw_check_vlan_id(struct epbuf_handler *epbh, u16 vlan_id)
 871 {
 872         union ep_buffer_info *info = epbh->info;
 873         bool ret = false;
 874         int i;
 875
 876         if (vlan_id == 0) {
 877                 ret = true;
 878         } else {
 879                 for (i = 0; i < EP_BUFFER_SUPPORT_VLAN_MAX; i++) {
 880                         if (vlan_id == info->v1i.vlan_id[i]) {
 881                                 ret = true;
 882                                 break;
 883                         }
 884                 }
 885         }
 886         return ret;
 887 }
 888
 889 bool fjes_hw_set_vlan_id(struct epbuf_handler *epbh, u16 vlan_id)
 890 {
 891         union ep_buffer_info *info = epbh->info;
 892         int i;
 893
 894         for (i = 0; i < EP_BUFFER_SUPPORT_VLAN_MAX; i++) {
 895                 if (info->v1i.vlan_id[i] == 0) {
 896                         info->v1i.vlan_id[i] = vlan_id;
 897                         return true;
 898                 }
 899         }
 900         return false;
 901 }
 902
 903 void fjes_hw_del_vlan_id(struct epbuf_handler *epbh, u16 vlan_id)
 904 {
 905         union ep_buffer_info *info = epbh->info;
 906         int i;
 907
 908         if (0 != vlan_id) {
 909                 for (i = 0; i < EP_BUFFER_SUPPORT_VLAN_MAX; i++) {
 910                         if (vlan_id == info->v1i.vlan_id[i])
 911                                 info->v1i.vlan_id[i] = 0;
 912                 }
 913         }
 914 }
 915
 916 bool fjes_hw_epbuf_rx_is_empty(struct epbuf_handler *epbh)
 917 {
 918         union ep_buffer_info *info = epbh->info;
 919
 920         if (!(info->v1i.rx_status & FJES_RX_MTU_CHANGING_DONE))
 921                 return true;
 922
 923         if (info->v1i.count_max == 0)
 924                 return true;
 925
 926         return EP_RING_EMPTY(info->v1i.head, info->v1i.tail,
 927                              info->v1i.count_max);
 928 }
 929
 930 void *fjes_hw_epbuf_rx_curpkt_get_addr(struct epbuf_handler *epbh,
 931                                        size_t *psize)
 932 {
 933         union ep_buffer_info *info = epbh->info;
 934         struct esmem_frame *ring_frame;
 935         void *frame;
 936
 937         ring_frame = (struct esmem_frame *)&(epbh->ring[EP_RING_INDEX
 938                                              (info->v1i.head,
 939                                               info->v1i.count_max) *
 940                                              info->v1i.frame_max]);
 941
 942         *psize = (size_t)ring_frame->frame_size;
 943
 944         frame = ring_frame->frame_data;
 945
 946         return frame;
 947 }
 948
 949 void fjes_hw_epbuf_rx_curpkt_drop(struct epbuf_handler *epbh)
 950 {
 951         union ep_buffer_info *info = epbh->info;
 952
 953         if (fjes_hw_epbuf_rx_is_empty(epbh))
 954                 return;
 955
 956         EP_RING_INDEX_INC(epbh->info->v1i.head, info->v1i.count_max);
 957 }
 958
 959 int fjes_hw_epbuf_tx_pkt_send(struct epbuf_handler *epbh,
 960                               void *frame, size_t size)
 961 {
 962         union ep_buffer_info *info = epbh->info;
 963         struct esmem_frame *ring_frame;
 964
 965         if (EP_RING_FULL(info->v1i.head, info->v1i.tail, info->v1i.count_max))
 966                 return -ENOBUFS;
 967
 968         ring_frame = (struct esmem_frame *)&(epbh->ring[EP_RING_INDEX
 969                                              (info->v1i.tail - 1,
 970                                               info->v1i.count_max) *
 971                                              info->v1i.frame_max]);
 972
 973         ring_frame->frame_size = size;
 974         memcpy((void *)(ring_frame->frame_data), (void *)frame, size);
 975
 976         EP_RING_INDEX_INC(epbh->info->v1i.tail, info->v1i.count_max);
 977
 978         return 0;
 979 }
 980
 981 static void fjes_hw_update_zone_task(struct work_struct *work)
 982 {
 983         struct fjes_hw *hw = container_of(work,
 984                         struct fjes_hw, update_zone_task);
 985
 986         struct my_s {u8 es_status; u8 zone; } *info;
 987         union fjes_device_command_res *res_buf;
 988         enum ep_partner_status pstatus;
 989
 990         struct fjes_adapter *adapter;
 991         struct net_device *netdev;
 992         unsigned long flags;
 993
 994         ulong unshare_bit = 0;
 995         ulong share_bit = 0;
 996         ulong irq_bit = 0;
 997
 998         int epidx;
 999         int ret;
1000
1001         adapter = (struct fjes_adapter *)hw->back;
1002         netdev = adapter->netdev;
1003         res_buf = hw->hw_info.res_buf;
1004         info = (struct my_s *)&res_buf->info.info;
1005
1006         mutex_lock(&hw->hw_info.lock);
1007
1008         ret = fjes_hw_request_info(hw);
1009         switch (ret) {
1010         case -ENOMSG:
1011         case -EBUSY:
1012         default:
1013                 if (!work_pending(&adapter->force_close_task)) {
1014                         adapter->force_reset = true;
1015                         schedule_work(&adapter->force_close_task);
1016                 }
1017                 break;
1018
1019         case 0:
1020
1021                 for (epidx = 0; epidx < hw->max_epid; epidx++) {
1022                         if (epidx == hw->my_epid) {
1023                                 hw->ep_shm_info[epidx].es_status =
1024                                         info[epidx].es_status;
1025                                 hw->ep_shm_info[epidx].zone =
1026                                         info[epidx].zone;
1027                                 continue;
1028                         }
1029
1030                         pstatus = fjes_hw_get_partner_ep_status(hw, epidx);
1031                         switch (pstatus) {
1032                         case EP_PARTNER_UNSHARE:
1033                         default:
1034                                 if ((info[epidx].zone !=
1035                                         FJES_ZONING_ZONE_TYPE_NONE) &&
1036                                     (info[epidx].es_status ==
1037                                         FJES_ZONING_STATUS_ENABLE) &&
1038                                     (info[epidx].zone ==
1039                                         info[hw->my_epid].zone))
1040                                         set_bit(epidx, &share_bit);
1041                                 else
1042                                         set_bit(epidx, &unshare_bit);
1043                                 break;
1044
1045                         case EP_PARTNER_COMPLETE:
1046                         case EP_PARTNER_WAITING:
1047                                 if ((info[epidx].zone ==
1048                                         FJES_ZONING_ZONE_TYPE_NONE) ||
1049                                     (info[epidx].es_status !=
1050                                         FJES_ZONING_STATUS_ENABLE) ||
1051                                     (info[epidx].zone !=
1052                                         info[hw->my_epid].zone)) {
1053                                         set_bit(epidx,
1054                                                 &adapter->unshare_watch_bitmask);
1055                                         set_bit(epidx,
1056                                                 &hw->hw_info.buffer_unshare_reserve_bit);
1057                                 }
1058                                 break;
1059
1060                         case EP_PARTNER_SHARED:
1061                                 if ((info[epidx].zone ==
1062                                         FJES_ZONING_ZONE_TYPE_NONE) ||
1063                                     (info[epidx].es_status !=
1064                                         FJES_ZONING_STATUS_ENABLE) ||
1065                                     (info[epidx].zone !=
1066                                         info[hw->my_epid].zone))
1067                                         set_bit(epidx, &irq_bit);
1068                                 break;
1069                         }
1070
1071                         hw->ep_shm_info[epidx].es_status =
1072                                 info[epidx].es_status;
1073                         hw->ep_shm_info[epidx].zone = info[epidx].zone;
1074                 }
1075                 break;
1076         }
1077
1078         mutex_unlock(&hw->hw_info.lock);
1079
1080         for (epidx = 0; epidx < hw->max_epid; epidx++) {
1081                 if (epidx == hw->my_epid)
1082                         continue;
1083
1084                 if (test_bit(epidx, &share_bit)) {
1085                         spin_lock_irqsave(&hw->rx_status_lock, flags);
1086                         fjes_hw_setup_epbuf(&hw->ep_shm_info[epidx].tx,
1087                                             netdev->dev_addr, netdev->mtu);
1088                         spin_unlock_irqrestore(&hw->rx_status_lock, flags);
1089
1090                         mutex_lock(&hw->hw_info.lock);
1091
1092                         ret = fjes_hw_register_buff_addr(
1093                                 hw, epidx, &hw->ep_shm_info[epidx]);
1094
1095                         switch (ret) {
1096                         case 0:
1097                                 break;
1098                         case -ENOMSG:
1099                         case -EBUSY:
1100                         default:
1101                                 if (!work_pending(&adapter->force_close_task)) {
1102                                         adapter->force_reset = true;
1103                                         schedule_work(
1104                                           &adapter->force_close_task);
1105                                 }
1106                                 break;
1107                         }
1108                         mutex_unlock(&hw->hw_info.lock);
1109
1110                         hw->ep_shm_info[epidx].ep_stats
1111                                               .com_regist_buf_exec += 1;
1112                 }
1113
1114                 if (test_bit(epidx, &unshare_bit)) {
1115                         mutex_lock(&hw->hw_info.lock);
1116
1117                         ret = fjes_hw_unregister_buff_addr(hw, epidx);
1118
1119                         switch (ret) {
1120                         case 0:
1121                                 break;
1122                         case -ENOMSG:
1123                         case -EBUSY:
1124                         default:
1125                                 if (!work_pending(&adapter->force_close_task)) {
1126                                         adapter->force_reset = true;
1127                                         schedule_work(
1128                                           &adapter->force_close_task);
1129                                 }
1130                                 break;
1131                         }
1132
1133                         mutex_unlock(&hw->hw_info.lock);
1134
1135                         hw->ep_shm_info[epidx].ep_stats
1136                                               .com_unregist_buf_exec += 1;
1137
1138                         if (ret == 0) {
1139                                 spin_lock_irqsave(&hw->rx_status_lock, flags);
1140                                 fjes_hw_setup_epbuf(
1141                                         &hw->ep_shm_info[epidx].tx,
1142                                         netdev->dev_addr, netdev->mtu);
1143                                 spin_unlock_irqrestore(&hw->rx_status_lock,
1144                                                        flags);
1145                         }
1146                 }
1147
1148                 if (test_bit(epidx, &irq_bit)) {
1149                         fjes_hw_raise_interrupt(hw, epidx,
1150                                                 REG_ICTL_MASK_TXRX_STOP_REQ);
1151
1152                         hw->ep_shm_info[epidx].ep_stats.send_intr_unshare += 1;
1153
1154                         set_bit(epidx, &hw->txrx_stop_req_bit);
1155                         spin_lock_irqsave(&hw->rx_status_lock, flags);
1156                         hw->ep_shm_info[epidx].tx.
1157                                 info->v1i.rx_status |=
1158                                         FJES_RX_STOP_REQ_REQUEST;
1159                         spin_unlock_irqrestore(&hw->rx_status_lock, flags);
1160                         set_bit(epidx, &hw->hw_info.buffer_unshare_reserve_bit);
1161                 }
1162         }
1163
1164         if (irq_bit || adapter->unshare_watch_bitmask) {
1165                 if (!work_pending(&adapter->unshare_watch_task))
1166                         queue_work(adapter->control_wq,
1167                                    &adapter->unshare_watch_task);
1168         }
1169 }
1170
1171 static void fjes_hw_epstop_task(struct work_struct *work)
1172 {
1173         struct fjes_hw *hw = container_of(work, struct fjes_hw, epstop_task);
1174         struct fjes_adapter *adapter = (struct fjes_adapter *)hw->back;
1175         unsigned long flags;
1176
1177         ulong remain_bit;
1178         int epid_bit;
1179
1180         while ((remain_bit = hw->epstop_req_bit)) {
1181                 for (epid_bit = 0; remain_bit; remain_bit >>= 1, epid_bit++) {
1182                         if (remain_bit & 1) {
1183                                 spin_lock_irqsave(&hw->rx_status_lock, flags);
1184                                 hw->ep_shm_info[epid_bit].
1185                                         tx.info->v1i.rx_status |=
1186                                                 FJES_RX_STOP_REQ_DONE;
1187                                 spin_unlock_irqrestore(&hw->rx_status_lock,
1188                                                        flags);
1189
1190                                 clear_bit(epid_bit, &hw->epstop_req_bit);
1191                                 set_bit(epid_bit,
1192                                         &adapter->unshare_watch_bitmask);
1193
1194                                 if (!work_pending(&adapter->unshare_watch_task))
1195                                         queue_work(
1196                                                 adapter->control_wq,
1197                                                 &adapter->unshare_watch_task);
1198                         }
1199                 }
1200         }
1201 }
1202
1203 int fjes_hw_start_debug(struct fjes_hw *hw)
1204 {
1205         union fjes_device_command_req *req_buf = hw->hw_info.req_buf;
1206         union fjes_device_command_res *res_buf = hw->hw_info.res_buf;
1207         enum fjes_dev_command_response_e ret;
1208         int page_count;
1209         int result = 0;
1210         void *addr;
1211         int i;
1212
1213         if (!hw->hw_info.trace)
1214                 return -EPERM;
1215         memset(hw->hw_info.trace, 0, FJES_DEBUG_BUFFER_SIZE);
1216
1217         memset(req_buf, 0, hw->hw_info.req_buf_size);
1218         memset(res_buf, 0, hw->hw_info.res_buf_size);
1219
1220         req_buf->start_trace.length =
1221                 FJES_DEV_COMMAND_START_DBG_REQ_LEN(hw->hw_info.trace_size);
1222         req_buf->start_trace.mode = hw->debug_mode;
1223         req_buf->start_trace.buffer_len = hw->hw_info.trace_size;
1224         page_count = hw->hw_info.trace_size / FJES_DEBUG_PAGE_SIZE;
1225         for (i = 0; i < page_count; i++) {
1226                 addr = ((u8 *)hw->hw_info.trace) + i * FJES_DEBUG_PAGE_SIZE;
1227                 req_buf->start_trace.buffer[i] =
1228                         (__le64)(page_to_phys(vmalloc_to_page(addr)) +
1229                         offset_in_page(addr));
1230         }
1231
1232         res_buf->start_trace.length = 0;
1233         res_buf->start_trace.code = 0;
1234
1235         trace_fjes_hw_start_debug_req(req_buf);
1236         ret = fjes_hw_issue_request_command(hw, FJES_CMD_REQ_START_DEBUG);
1237         trace_fjes_hw_start_debug(res_buf);
1238
1239         if (res_buf->start_trace.length !=
1240                 FJES_DEV_COMMAND_START_DBG_RES_LEN) {
1241                 result = -ENOMSG;
1242                 trace_fjes_hw_start_debug_err("Invalid res_buf");
1243         } else if (ret == FJES_CMD_STATUS_NORMAL) {
1244                 switch (res_buf->start_trace.code) {
1245                 case FJES_CMD_REQ_RES_CODE_NORMAL:
1246                         result = 0;
1247                         break;
1248                 default:
1249                         result = -EPERM;
1250                         break;
1251                 }
1252         } else {
1253                 switch (ret) {
1254                 case FJES_CMD_STATUS_UNKNOWN:
1255                         result = -EPERM;
1256                         break;
1257                 case FJES_CMD_STATUS_TIMEOUT:
1258                         trace_fjes_hw_start_debug_err("Busy Timeout");
1259                         result = -EBUSY;
1260                         break;
1261                 case FJES_CMD_STATUS_ERROR_PARAM:
1262                 case FJES_CMD_STATUS_ERROR_STATUS:
1263                 default:
1264                         result = -EPERM;
1265                         break;
1266                 }
1267         }
1268
1269         return result;
1270 }
1271
1272 int fjes_hw_stop_debug(struct fjes_hw *hw)
1273 {
1274         union fjes_device_command_req *req_buf = hw->hw_info.req_buf;
1275         union fjes_device_command_res *res_buf = hw->hw_info.res_buf;
1276         enum fjes_dev_command_response_e ret;
1277         int result = 0;
1278
1279         if (!hw->hw_info.trace)
1280                 return -EPERM;
1281
1282         memset(req_buf, 0, hw->hw_info.req_buf_size);
1283         memset(res_buf, 0, hw->hw_info.res_buf_size);
1284         req_buf->stop_trace.length = FJES_DEV_COMMAND_STOP_DBG_REQ_LEN;
1285
1286         res_buf->stop_trace.length = 0;
1287         res_buf->stop_trace.code = 0;
1288
1289         ret = fjes_hw_issue_request_command(hw, FJES_CMD_REQ_STOP_DEBUG);
1290         trace_fjes_hw_stop_debug(res_buf);
1291
1292         if (res_buf->stop_trace.length != FJES_DEV_COMMAND_STOP_DBG_RES_LEN) {
1293                 trace_fjes_hw_stop_debug_err("Invalid res_buf");
1294                 result = -ENOMSG;
1295         } else if (ret == FJES_CMD_STATUS_NORMAL) {
1296                 switch (res_buf->stop_trace.code) {
1297                 case FJES_CMD_REQ_RES_CODE_NORMAL:
1298                         result = 0;
1299                         hw->debug_mode = 0;
1300                         break;
1301                 default:
1302                         result = -EPERM;
1303                         break;
1304                 }
1305         } else {
1306                 switch (ret) {
1307                 case FJES_CMD_STATUS_UNKNOWN:
1308                         result = -EPERM;
1309                         break;
1310                 case FJES_CMD_STATUS_TIMEOUT:
1311                         result = -EBUSY;
1312                         trace_fjes_hw_stop_debug_err("Busy Timeout");
1313                         break;
1314                 case FJES_CMD_STATUS_ERROR_PARAM:
1315                 case FJES_CMD_STATUS_ERROR_STATUS:
1316                 default:
1317                         result = -EPERM;
1318                         break;
1319                 }
1320         }
1321
1322         return result;
1323 }