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