drivers/net/qlge/qlge_mpi.c

   1 #include "qlge.h"
   2
   3 static void ql_display_mb_sts(struct ql_adapter *qdev,
   4                                                 struct mbox_params *mbcp)
   5 {
   6         int i;
   7         static char *err_sts[] = {
   8                 "Command Complete",
   9                 "Command Not Supported",
  10                 "Host Interface Error",
  11                 "Checksum Error",
  12                 "Unused Completion Status",
  13                 "Test Failed",
  14                 "Command Parameter Error"};
  15
  16         QPRINTK(qdev, DRV, DEBUG, "%s.\n",
  17                 err_sts[mbcp->mbox_out[0] & 0x0000000f]);
  18         for (i = 0; i < mbcp->out_count; i++)
  19                 QPRINTK(qdev, DRV, DEBUG, "mbox_out[%d] = 0x%.08x.\n",
  20                                 i, mbcp->mbox_out[i]);
  21 }
  22
  23 int ql_read_mpi_reg(struct ql_adapter *qdev, u32 reg, u32 *data)
  24 {
  25         int status;
  26         /* wait for reg to come ready */
  27         status = ql_wait_reg_rdy(qdev, PROC_ADDR, PROC_ADDR_RDY, PROC_ADDR_ERR);
  28         if (status)
  29                 goto exit;
  30         /* set up for reg read */
  31         ql_write32(qdev, PROC_ADDR, reg | PROC_ADDR_R);
  32         /* wait for reg to come ready */
  33         status = ql_wait_reg_rdy(qdev, PROC_ADDR, PROC_ADDR_RDY, PROC_ADDR_ERR);
  34         if (status)
  35                 goto exit;
  36         /* get the data */
  37         *data = ql_read32(qdev, PROC_DATA);
  38 exit:
  39         return status;
  40 }
  41
  42 int ql_write_mpi_reg(struct ql_adapter *qdev, u32 reg, u32 data)
  43 {
  44         int status = 0;
  45         /* wait for reg to come ready */
  46         status = ql_wait_reg_rdy(qdev, PROC_ADDR, PROC_ADDR_RDY, PROC_ADDR_ERR);
  47         if (status)
  48                 goto exit;
  49         /* write the data to the data reg */
  50         ql_write32(qdev, PROC_DATA, data);
  51         /* trigger the write */
  52         ql_write32(qdev, PROC_ADDR, reg);
  53         /* wait for reg to come ready */
  54         status = ql_wait_reg_rdy(qdev, PROC_ADDR, PROC_ADDR_RDY, PROC_ADDR_ERR);
  55         if (status)
  56                 goto exit;
  57 exit:
  58         return status;
  59 }
  60
  61 int ql_soft_reset_mpi_risc(struct ql_adapter *qdev)
  62 {
  63         int status;
  64         status = ql_write_mpi_reg(qdev, 0x00001010, 1);
  65         return status;
  66 }
  67
  68 static int ql_get_mb_sts(struct ql_adapter *qdev, struct mbox_params *mbcp)
  69 {
  70         int i, status;
  71
  72         status = ql_sem_spinlock(qdev, SEM_PROC_REG_MASK);
  73         if (status)
  74                 return -EBUSY;
  75         for (i = 0; i < mbcp->out_count; i++) {
  76                 status =
  77                     ql_read_mpi_reg(qdev, qdev->mailbox_out + i,
  78                                      &mbcp->mbox_out[i]);
  79                 if (status) {
  80                         QPRINTK(qdev, DRV, ERR, "Failed mailbox read.\n");
  81                         break;
  82                 }
  83         }
  84         ql_sem_unlock(qdev, SEM_PROC_REG_MASK); /* does flush too */
  85         return status;
  86 }
  87
  88 /* Wait for a single mailbox command to complete.
  89  * Returns zero on success.
  90  */
  91 static int ql_wait_mbx_cmd_cmplt(struct ql_adapter *qdev)
  92 {
  93         int count = 100;
  94         u32 value;
  95
  96         do {
  97                 value = ql_read32(qdev, STS);
  98                 if (value & STS_PI)
  99                         return 0;
 100                 mdelay(UDELAY_DELAY); /* 100ms */
 101         } while (--count);
 102         return -ETIMEDOUT;
 103 }
 104
 105 /* Execute a single mailbox command.
 106  * Caller must hold PROC_ADDR semaphore.
 107  */
 108 static int ql_exec_mb_cmd(struct ql_adapter *qdev, struct mbox_params *mbcp)
 109 {
 110         int i, status;
 111
 112         /*
 113          * Make sure there's nothing pending.
 114          * This shouldn't happen.
 115          */
 116         if (ql_read32(qdev, CSR) & CSR_HRI)
 117                 return -EIO;
 118
 119         status = ql_sem_spinlock(qdev, SEM_PROC_REG_MASK);
 120         if (status)
 121                 return status;
 122
 123         /*
 124          * Fill the outbound mailboxes.
 125          */
 126         for (i = 0; i < mbcp->in_count; i++) {
 127                 status = ql_write_mpi_reg(qdev, qdev->mailbox_in + i,
 128                                                 mbcp->mbox_in[i]);
 129                 if (status)
 130                         goto end;
 131         }
 132         /*
 133          * Wake up the MPI firmware.
 134          */
 135         ql_write32(qdev, CSR, CSR_CMD_SET_H2R_INT);
 136 end:
 137         ql_sem_unlock(qdev, SEM_PROC_REG_MASK);
 138         return status;
 139 }
 140
 141 /* We are being asked by firmware to accept
 142  * a change to the port.  This is only
 143  * a change to max frame sizes (Tx/Rx), pause
 144  * paramters, or loopback mode. We wake up a worker
 145  * to handler processing this since a mailbox command
 146  * will need to be sent to ACK the request.
 147  */
 148 static int ql_idc_req_aen(struct ql_adapter *qdev)
 149 {
 150         int status;
 151         struct mbox_params *mbcp = &qdev->idc_mbc;
 152
 153         QPRINTK(qdev, DRV, ERR, "Enter!\n");
 154         /* Get the status data and start up a thread to
 155          * handle the request.
 156          */
 157         mbcp = &qdev->idc_mbc;
 158         mbcp->out_count = 4;
 159         status = ql_get_mb_sts(qdev, mbcp);
 160         if (status) {
 161                 QPRINTK(qdev, DRV, ERR,
 162                         "Could not read MPI, resetting ASIC!\n");
 163                 ql_queue_asic_error(qdev);
 164         } else  {
 165                 /* Begin polled mode early so
 166                  * we don't get another interrupt
 167                  * when we leave mpi_worker.
 168                  */
 169                 ql_write32(qdev, INTR_MASK, (INTR_MASK_PI << 16));
 170                 queue_delayed_work(qdev->workqueue, &qdev->mpi_idc_work, 0);
 171         }
 172         return status;
 173 }
 174
 175 /* Process an inter-device event completion.
 176  * If good, signal the caller's completion.
 177  */
 178 static int ql_idc_cmplt_aen(struct ql_adapter *qdev)
 179 {
 180         int status;
 181         struct mbox_params *mbcp = &qdev->idc_mbc;
 182         mbcp->out_count = 4;
 183         status = ql_get_mb_sts(qdev, mbcp);
 184         if (status) {
 185                 QPRINTK(qdev, DRV, ERR,
 186                         "Could not read MPI, resetting RISC!\n");
 187                 ql_queue_fw_error(qdev);
 188         } else
 189                 /* Wake up the sleeping mpi_idc_work thread that is
 190                  * waiting for this event.
 191                  */
 192                 complete(&qdev->ide_completion);
 193
 194         return status;
 195 }
 196
 197 static void ql_link_up(struct ql_adapter *qdev, struct mbox_params *mbcp)
 198 {
 199         int status;
 200         mbcp->out_count = 2;
 201
 202         status = ql_get_mb_sts(qdev, mbcp);
 203         if (status) {
 204                 QPRINTK(qdev, DRV, ERR,
 205                         "%s: Could not get mailbox status.\n", __func__);
 206                 return;
 207         }
 208
 209         qdev->link_status = mbcp->mbox_out[1];
 210         QPRINTK(qdev, DRV, ERR, "Link Up.\n");
 211
 212         /* If we're coming back from an IDC event
 213          * then set up the CAM and frame routing.
 214          */
 215         if (test_bit(QL_CAM_RT_SET, &qdev->flags)) {
 216                 status = ql_cam_route_initialize(qdev);
 217                 if (status) {
 218                         QPRINTK(qdev, IFUP, ERR,
 219                         "Failed to init CAM/Routing tables.\n");
 220                         return;
 221                 } else
 222                         clear_bit(QL_CAM_RT_SET, &qdev->flags);
 223         }
 224
 225         /* Queue up a worker to check the frame
 226          * size information, and fix it if it's not
 227          * to our liking.
 228          */
 229         if (!test_bit(QL_PORT_CFG, &qdev->flags)) {
 230                 QPRINTK(qdev, DRV, ERR, "Queue Port Config Worker!\n");
 231                 set_bit(QL_PORT_CFG, &qdev->flags);
 232                 /* Begin polled mode early so
 233                  * we don't get another interrupt
 234                  * when we leave mpi_worker dpc.
 235                  */
 236                 ql_write32(qdev, INTR_MASK, (INTR_MASK_PI << 16));
 237                 queue_delayed_work(qdev->workqueue,
 238                                 &qdev->mpi_port_cfg_work, 0);
 239         }
 240
 241         netif_carrier_on(qdev->ndev);
 242 }
 243
 244 static void ql_link_down(struct ql_adapter *qdev, struct mbox_params *mbcp)
 245 {
 246         int status;
 247
 248         mbcp->out_count = 3;
 249
 250         status = ql_get_mb_sts(qdev, mbcp);
 251         if (status)
 252                 QPRINTK(qdev, DRV, ERR, "Link down AEN broken!\n");
 253
 254         netif_carrier_off(qdev->ndev);
 255 }
 256
 257 static int ql_sfp_in(struct ql_adapter *qdev, struct mbox_params *mbcp)
 258 {
 259         int status;
 260
 261         mbcp->out_count = 5;
 262
 263         status = ql_get_mb_sts(qdev, mbcp);
 264         if (status)
 265                 QPRINTK(qdev, DRV, ERR, "SFP in AEN broken!\n");
 266         else
 267                 QPRINTK(qdev, DRV, ERR, "SFP insertion detected.\n");
 268
 269         return status;
 270 }
 271
 272 static int ql_sfp_out(struct ql_adapter *qdev, struct mbox_params *mbcp)
 273 {
 274         int status;
 275
 276         mbcp->out_count = 1;
 277
 278         status = ql_get_mb_sts(qdev, mbcp);
 279         if (status)
 280                 QPRINTK(qdev, DRV, ERR, "SFP out AEN broken!\n");
 281         else
 282                 QPRINTK(qdev, DRV, ERR, "SFP removal detected.\n");
 283
 284         return status;
 285 }
 286
 287 static int ql_aen_lost(struct ql_adapter *qdev, struct mbox_params *mbcp)
 288 {
 289         int status;
 290
 291         mbcp->out_count = 6;
 292
 293         status = ql_get_mb_sts(qdev, mbcp);
 294         if (status)
 295                 QPRINTK(qdev, DRV, ERR, "Lost AEN broken!\n");
 296         else {
 297                 int i;
 298                 QPRINTK(qdev, DRV, ERR, "Lost AEN detected.\n");
 299                 for (i = 0; i < mbcp->out_count; i++)
 300                         QPRINTK(qdev, DRV, ERR, "mbox_out[%d] = 0x%.08x.\n",
 301                                         i, mbcp->mbox_out[i]);
 302
 303         }
 304
 305         return status;
 306 }
 307
 308 static void ql_init_fw_done(struct ql_adapter *qdev, struct mbox_params *mbcp)
 309 {
 310         int status;
 311
 312         mbcp->out_count = 2;
 313
 314         status = ql_get_mb_sts(qdev, mbcp);
 315         if (status) {
 316                 QPRINTK(qdev, DRV, ERR, "Firmware did not initialize!\n");
 317         } else {
 318                 QPRINTK(qdev, DRV, ERR, "Firmware Revision  = 0x%.08x.\n",
 319                         mbcp->mbox_out[1]);
 320                 status = ql_cam_route_initialize(qdev);
 321                 if (status)
 322                         QPRINTK(qdev, IFUP, ERR,
 323                                 "Failed to init CAM/Routing tables.\n");
 324         }
 325 }
 326
 327 /* Process an async event and clear it unless it's an
 328  * error condition.
 329  *  This can get called iteratively from the mpi_work thread
 330  *  when events arrive via an interrupt.
 331  *  It also gets called when a mailbox command is polling for
 332  *  it's completion. */
 333 static int ql_mpi_handler(struct ql_adapter *qdev, struct mbox_params *mbcp)
 334 {
 335         int status;
 336         int orig_count = mbcp->out_count;
 337
 338         /* Just get mailbox zero for now. */
 339         mbcp->out_count = 1;
 340         status = ql_get_mb_sts(qdev, mbcp);
 341         if (status) {
 342                 QPRINTK(qdev, DRV, ERR,
 343                         "Could not read MPI, resetting ASIC!\n");
 344                 ql_queue_asic_error(qdev);
 345                 goto end;
 346         }
 347
 348         switch (mbcp->mbox_out[0]) {
 349
 350         /* This case is only active when we arrive here
 351          * as a result of issuing a mailbox command to
 352          * the firmware.
 353          */
 354         case MB_CMD_STS_INTRMDT:
 355         case MB_CMD_STS_GOOD:
 356         case MB_CMD_STS_INVLD_CMD:
 357         case MB_CMD_STS_XFC_ERR:
 358         case MB_CMD_STS_CSUM_ERR:
 359         case MB_CMD_STS_ERR:
 360         case MB_CMD_STS_PARAM_ERR:
 361                 /* We can only get mailbox status if we're polling from an
 362                  * unfinished command.  Get the rest of the status data and
 363                  * return back to the caller.
 364                  * We only end up here when we're polling for a mailbox
 365                  * command completion.
 366                  */
 367                 mbcp->out_count = orig_count;
 368                 status = ql_get_mb_sts(qdev, mbcp);
 369                 return status;
 370
 371         /* We are being asked by firmware to accept
 372          * a change to the port.  This is only
 373          * a change to max frame sizes (Tx/Rx), pause
 374          * paramters, or loopback mode.
 375          */
 376         case AEN_IDC_REQ:
 377                 status = ql_idc_req_aen(qdev);
 378                 break;
 379
 380         /* Process and inbound IDC event.
 381          * This will happen when we're trying to
 382          * change tx/rx max frame size, change pause
 383          * paramters or loopback mode.
 384          */
 385         case AEN_IDC_CMPLT:
 386         case AEN_IDC_EXT:
 387                 status = ql_idc_cmplt_aen(qdev);
 388                 break;
 389
 390         case AEN_LINK_UP:
 391                 ql_link_up(qdev, mbcp);
 392                 break;
 393
 394         case AEN_LINK_DOWN:
 395                 ql_link_down(qdev, mbcp);
 396                 break;
 397
 398         case AEN_FW_INIT_DONE:
 399                 /* If we're in process on executing the firmware,
 400                  * then convert the status to normal mailbox status.
 401                  */
 402                 if (mbcp->mbox_in[0] == MB_CMD_EX_FW) {
 403                         mbcp->out_count = orig_count;
 404                         status = ql_get_mb_sts(qdev, mbcp);
 405                         mbcp->mbox_out[0] = MB_CMD_STS_GOOD;
 406                         return status;
 407                 }
 408                 ql_init_fw_done(qdev, mbcp);
 409                 break;
 410
 411         case AEN_AEN_SFP_IN:
 412                 ql_sfp_in(qdev, mbcp);
 413                 break;
 414
 415         case AEN_AEN_SFP_OUT:
 416                 ql_sfp_out(qdev, mbcp);
 417                 break;
 418
 419         /* This event can arrive at boot time or after an
 420          * MPI reset if the firmware failed to initialize.
 421          */
 422         case AEN_FW_INIT_FAIL:
 423                 /* If we're in process on executing the firmware,
 424                  * then convert the status to normal mailbox status.
 425                  */
 426                 if (mbcp->mbox_in[0] == MB_CMD_EX_FW) {
 427                         mbcp->out_count = orig_count;
 428                         status = ql_get_mb_sts(qdev, mbcp);
 429                         mbcp->mbox_out[0] = MB_CMD_STS_ERR;
 430                         return status;
 431                 }
 432                 QPRINTK(qdev, DRV, ERR,
 433                         "Firmware initialization failed.\n");
 434                 status = -EIO;
 435                 ql_queue_fw_error(qdev);
 436                 break;
 437
 438         case AEN_SYS_ERR:
 439                 QPRINTK(qdev, DRV, ERR,
 440                         "System Error.\n");
 441                 ql_queue_fw_error(qdev);
 442                 status = -EIO;
 443                 break;
 444
 445         case AEN_AEN_LOST:
 446                 ql_aen_lost(qdev, mbcp);
 447                 break;
 448
 449         default:
 450                 QPRINTK(qdev, DRV, ERR,
 451                         "Unsupported AE %.08x.\n", mbcp->mbox_out[0]);
 452                 /* Clear the MPI firmware status. */
 453         }
 454 end:
 455         ql_write32(qdev, CSR, CSR_CMD_CLR_R2PCI_INT);
 456         /* Restore the original mailbox count to
 457          * what the caller asked for.  This can get
 458          * changed when a mailbox command is waiting
 459          * for a response and an AEN arrives and
 460          * is handled.
 461          * */
 462         mbcp->out_count = orig_count;
 463         return status;
 464 }
 465
 466 /* Execute a single mailbox command.
 467  * mbcp is a pointer to an array of u32.  Each
 468  * element in the array contains the value for it's
 469  * respective mailbox register.
 470  */
 471 static int ql_mailbox_command(struct ql_adapter *qdev, struct mbox_params *mbcp)
 472 {
 473         int status, count;
 474
 475         mutex_lock(&qdev->mpi_mutex);
 476
 477         /* Begin polled mode for MPI */
 478         ql_write32(qdev, INTR_MASK, (INTR_MASK_PI << 16));
 479
 480         /* Load the mailbox registers and wake up MPI RISC. */
 481         status = ql_exec_mb_cmd(qdev, mbcp);
 482         if (status)
 483                 goto end;
 484
 485
 486         /* If we're generating a system error, then there's nothing
 487          * to wait for.
 488          */
 489         if (mbcp->mbox_in[0] == MB_CMD_MAKE_SYS_ERR)
 490                 goto end;
 491
 492         /* Wait for the command to complete. We loop
 493          * here because some AEN might arrive while
 494          * we're waiting for the mailbox command to
 495          * complete. If more than 5 arrive then we can
 496          * assume something is wrong. */
 497         count = 5;
 498         do {
 499                 /* Wait for the interrupt to come in. */
 500                 status = ql_wait_mbx_cmd_cmplt(qdev);
 501                 if (status)
 502                         goto end;
 503
 504                 /* Process the event.  If it's an AEN, it
 505                  * will be handled in-line or a worker
 506                  * will be spawned. If it's our completion
 507                  * we will catch it below.
 508                  */
 509                 status = ql_mpi_handler(qdev, mbcp);
 510                 if (status)
 511                         goto end;
 512
 513                 /* It's either the completion for our mailbox
 514                  * command complete or an AEN.  If it's our
 515                  * completion then get out.
 516                  */
 517                 if (((mbcp->mbox_out[0] & 0x0000f000) ==
 518                                         MB_CMD_STS_GOOD) ||
 519                         ((mbcp->mbox_out[0] & 0x0000f000) ==
 520                                         MB_CMD_STS_INTRMDT))
 521                         break;
 522         } while (--count);
 523
 524         if (!count) {
 525                 QPRINTK(qdev, DRV, ERR,
 526                         "Timed out waiting for mailbox complete.\n");
 527                 status = -ETIMEDOUT;
 528                 goto end;
 529         }
 530
 531         /* Now we can clear the interrupt condition
 532          * and look at our status.
 533          */
 534         ql_write32(qdev, CSR, CSR_CMD_CLR_R2PCI_INT);
 535
 536         if (((mbcp->mbox_out[0] & 0x0000f000) !=
 537                                         MB_CMD_STS_GOOD) &&
 538                 ((mbcp->mbox_out[0] & 0x0000f000) !=
 539                                         MB_CMD_STS_INTRMDT)) {
 540                 ql_display_mb_sts(qdev, mbcp);
 541                 status = -EIO;
 542         }
 543 end:
 544         mutex_unlock(&qdev->mpi_mutex);
 545         /* End polled mode for MPI */
 546         ql_write32(qdev, INTR_MASK, (INTR_MASK_PI << 16) | INTR_MASK_PI);
 547         return status;
 548 }
 549
 550 /* Get functional state for MPI firmware.
 551  * Returns zero on success.
 552  */
 553 int ql_mb_get_fw_state(struct ql_adapter *qdev)
 554 {
 555         struct mbox_params mbc;
 556         struct mbox_params *mbcp = &mbc;
 557         int status = 0;
 558
 559         memset(mbcp, 0, sizeof(struct mbox_params));
 560
 561         mbcp->in_count = 1;
 562         mbcp->out_count = 2;
 563
 564         mbcp->mbox_in[0] = MB_CMD_GET_FW_STATE;
 565
 566         status = ql_mailbox_command(qdev, mbcp);
 567         if (status)
 568                 return status;
 569
 570         if (mbcp->mbox_out[0] != MB_CMD_STS_GOOD) {
 571                 QPRINTK(qdev, DRV, ERR,
 572                         "Failed Get Firmware State.\n");
 573                 status = -EIO;
 574         }
 575
 576         /* If bit zero is set in mbx 1 then the firmware is
 577          * running, but not initialized.  This should never
 578          * happen.
 579          */
 580         if (mbcp->mbox_out[1] & 1) {
 581                 QPRINTK(qdev, DRV, ERR,
 582                         "Firmware waiting for initialization.\n");
 583                 status = -EIO;
 584         }
 585
 586         return status;
 587 }
 588
 589 /* Send and ACK mailbox command to the firmware to
 590  * let it continue with the change.
 591  */
 592 int ql_mb_idc_ack(struct ql_adapter *qdev)
 593 {
 594         struct mbox_params mbc;
 595         struct mbox_params *mbcp = &mbc;
 596         int status = 0;
 597
 598         memset(mbcp, 0, sizeof(struct mbox_params));
 599
 600         mbcp->in_count = 5;
 601         mbcp->out_count = 1;
 602
 603         mbcp->mbox_in[0] = MB_CMD_IDC_ACK;
 604         mbcp->mbox_in[1] = qdev->idc_mbc.mbox_out[1];
 605         mbcp->mbox_in[2] = qdev->idc_mbc.mbox_out[2];
 606         mbcp->mbox_in[3] = qdev->idc_mbc.mbox_out[3];
 607         mbcp->mbox_in[4] = qdev->idc_mbc.mbox_out[4];
 608
 609         status = ql_mailbox_command(qdev, mbcp);
 610         if (status)
 611                 return status;
 612
 613         if (mbcp->mbox_out[0] != MB_CMD_STS_GOOD) {
 614                 QPRINTK(qdev, DRV, ERR,
 615                         "Failed IDC ACK send.\n");
 616                 status = -EIO;
 617         }
 618         return status;
 619 }
 620
 621 /* Get link settings and maximum frame size settings
 622  * for the current port.
 623  * Most likely will block.
 624  */
 625 static int ql_mb_set_port_cfg(struct ql_adapter *qdev)
 626 {
 627         struct mbox_params mbc;
 628         struct mbox_params *mbcp = &mbc;
 629         int status = 0;
 630
 631         memset(mbcp, 0, sizeof(struct mbox_params));
 632
 633         mbcp->in_count = 3;
 634         mbcp->out_count = 1;
 635
 636         mbcp->mbox_in[0] = MB_CMD_SET_PORT_CFG;
 637         mbcp->mbox_in[1] = qdev->link_config;
 638         mbcp->mbox_in[2] = qdev->max_frame_size;
 639
 640
 641         status = ql_mailbox_command(qdev, mbcp);
 642         if (status)
 643                 return status;
 644
 645         if (mbcp->mbox_out[0] == MB_CMD_STS_INTRMDT) {
 646                 QPRINTK(qdev, DRV, ERR,
 647                         "Port Config sent, wait for IDC.\n");
 648         } else  if (mbcp->mbox_out[0] != MB_CMD_STS_GOOD) {
 649                 QPRINTK(qdev, DRV, ERR,
 650                         "Failed Set Port Configuration.\n");
 651                 status = -EIO;
 652         }
 653         return status;
 654 }
 655
 656 /* Get link settings and maximum frame size settings
 657  * for the current port.
 658  * Most likely will block.
 659  */
 660 static int ql_mb_get_port_cfg(struct ql_adapter *qdev)
 661 {
 662         struct mbox_params mbc;
 663         struct mbox_params *mbcp = &mbc;
 664         int status = 0;
 665
 666         memset(mbcp, 0, sizeof(struct mbox_params));
 667
 668         mbcp->in_count = 1;
 669         mbcp->out_count = 3;
 670
 671         mbcp->mbox_in[0] = MB_CMD_GET_PORT_CFG;
 672
 673         status = ql_mailbox_command(qdev, mbcp);
 674         if (status)
 675                 return status;
 676
 677         if (mbcp->mbox_out[0] != MB_CMD_STS_GOOD) {
 678                 QPRINTK(qdev, DRV, ERR,
 679                         "Failed Get Port Configuration.\n");
 680                 status = -EIO;
 681         } else  {
 682                 QPRINTK(qdev, DRV, DEBUG,
 683                         "Passed Get Port Configuration.\n");
 684                 qdev->link_config = mbcp->mbox_out[1];
 685                 qdev->max_frame_size = mbcp->mbox_out[2];
 686         }
 687         return status;
 688 }
 689
 690 /* IDC - Inter Device Communication...
 691  * Some firmware commands require consent of adjacent FCOE
 692  * function.  This function waits for the OK, or a
 693  * counter-request for a little more time.i
 694  * The firmware will complete the request if the other
 695  * function doesn't respond.
 696  */
 697 static int ql_idc_wait(struct ql_adapter *qdev)
 698 {
 699         int status = -ETIMEDOUT;
 700         long wait_time = 1 * HZ;
 701         struct mbox_params *mbcp = &qdev->idc_mbc;
 702         do {
 703                 /* Wait here for the command to complete
 704                  * via the IDC process.
 705                  */
 706                 wait_time =
 707                         wait_for_completion_timeout(&qdev->ide_completion,
 708                                                         wait_time);
 709                 if (!wait_time) {
 710                         QPRINTK(qdev, DRV, ERR,
 711                                 "IDC Timeout.\n");
 712                         break;
 713                 }
 714                 /* Now examine the response from the IDC process.
 715                  * We might have a good completion or a request for
 716                  * more wait time.
 717                  */
 718                 if (mbcp->mbox_out[0] == AEN_IDC_EXT) {
 719                         QPRINTK(qdev, DRV, ERR,
 720                                 "IDC Time Extension from function.\n");
 721                         wait_time += (mbcp->mbox_out[1] >> 8) & 0x0000000f;
 722                 } else if (mbcp->mbox_out[0] == AEN_IDC_CMPLT) {
 723                         QPRINTK(qdev, DRV, ERR,
 724                                 "IDC Success.\n");
 725                         status = 0;
 726                         break;
 727                 } else {
 728                         QPRINTK(qdev, DRV, ERR,
 729                                 "IDC: Invalid State 0x%.04x.\n",
 730                                 mbcp->mbox_out[0]);
 731                         status = -EIO;
 732                         break;
 733                 }
 734         } while (wait_time);
 735
 736         return status;
 737 }
 738
 739 /* API called in work thread context to set new TX/RX
 740  * maximum frame size values to match MTU.
 741  */
 742 static int ql_set_port_cfg(struct ql_adapter *qdev)
 743 {
 744         int status;
 745         status = ql_mb_set_port_cfg(qdev);
 746         if (status)
 747                 return status;
 748         status = ql_idc_wait(qdev);
 749         return status;
 750 }
 751
 752 /* The following routines are worker threads that process
 753  * events that may sleep waiting for completion.
 754  */
 755
 756 /* This thread gets the maximum TX and RX frame size values
 757  * from the firmware and, if necessary, changes them to match
 758  * the MTU setting.
 759  */
 760 void ql_mpi_port_cfg_work(struct work_struct *work)
 761 {
 762         struct ql_adapter *qdev =
 763             container_of(work, struct ql_adapter, mpi_port_cfg_work.work);
 764         int status;
 765
 766         status = ql_mb_get_port_cfg(qdev);
 767         if (status) {
 768                 QPRINTK(qdev, DRV, ERR,
 769                         "Bug: Failed to get port config data.\n");
 770                 goto err;
 771         }
 772
 773         if (qdev->link_config & CFG_JUMBO_FRAME_SIZE &&
 774                         qdev->max_frame_size ==
 775                         CFG_DEFAULT_MAX_FRAME_SIZE)
 776                 goto end;
 777
 778         qdev->link_config |=    CFG_JUMBO_FRAME_SIZE;
 779         qdev->max_frame_size = CFG_DEFAULT_MAX_FRAME_SIZE;
 780         status = ql_set_port_cfg(qdev);
 781         if (status) {
 782                 QPRINTK(qdev, DRV, ERR,
 783                         "Bug: Failed to set port config data.\n");
 784                 goto err;
 785         }
 786 end:
 787         clear_bit(QL_PORT_CFG, &qdev->flags);
 788         return;
 789 err:
 790         ql_queue_fw_error(qdev);
 791         goto end;
 792 }
 793
 794 /* Process an inter-device request.  This is issues by
 795  * the firmware in response to another function requesting
 796  * a change to the port. We set a flag to indicate a change
 797  * has been made and then send a mailbox command ACKing
 798  * the change request.
 799  */
 800 void ql_mpi_idc_work(struct work_struct *work)
 801 {
 802         struct ql_adapter *qdev =
 803             container_of(work, struct ql_adapter, mpi_idc_work.work);
 804         int status;
 805         struct mbox_params *mbcp = &qdev->idc_mbc;
 806         u32 aen;
 807
 808         aen = mbcp->mbox_out[1] >> 16;
 809
 810         switch (aen) {
 811         default:
 812                 QPRINTK(qdev, DRV, ERR,
 813                         "Bug: Unhandled IDC action.\n");
 814                 break;
 815         case MB_CMD_PORT_RESET:
 816         case MB_CMD_SET_PORT_CFG:
 817         case MB_CMD_STOP_FW:
 818                 netif_carrier_off(qdev->ndev);
 819                 /* Signal the resulting link up AEN
 820                  * that the frame routing and mac addr
 821                  * needs to be set.
 822                  * */
 823                 set_bit(QL_CAM_RT_SET, &qdev->flags);
 824                 status = ql_mb_idc_ack(qdev);
 825                 if (status) {
 826                         QPRINTK(qdev, DRV, ERR,
 827                         "Bug: No pending IDC!\n");
 828                 }
 829         }
 830 }
 831
 832 void ql_mpi_work(struct work_struct *work)
 833 {
 834         struct ql_adapter *qdev =
 835             container_of(work, struct ql_adapter, mpi_work.work);
 836         struct mbox_params mbc;
 837         struct mbox_params *mbcp = &mbc;
 838         int err = 0;
 839
 840         mutex_lock(&qdev->mpi_mutex);
 841
 842         while (ql_read32(qdev, STS) & STS_PI) {
 843                 memset(mbcp, 0, sizeof(struct mbox_params));
 844                 mbcp->out_count = 1;
 845                 /* Don't continue if an async event
 846                  * did not complete properly.
 847                  */
 848                 err = ql_mpi_handler(qdev, mbcp);
 849                 if (err)
 850                         break;
 851         }
 852
 853         mutex_unlock(&qdev->mpi_mutex);
 854         ql_enable_completion_interrupt(qdev, 0);
 855 }
 856
 857 void ql_mpi_reset_work(struct work_struct *work)
 858 {
 859         struct ql_adapter *qdev =
 860             container_of(work, struct ql_adapter, mpi_reset_work.work);
 861         cancel_delayed_work_sync(&qdev->mpi_work);
 862         cancel_delayed_work_sync(&qdev->mpi_port_cfg_work);
 863         cancel_delayed_work_sync(&qdev->mpi_idc_work);
 864         ql_soft_reset_mpi_risc(qdev);
 865 }