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 = 50; /* TODO: arbitrary for now. */
  94         u32 value;
  95
  96         do {
  97                 value = ql_read32(qdev, STS);
  98                 if (value & STS_PI)
  99                         return 0;
 100                 udelay(UDELAY_DELAY); /* 10us */
 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 /* Process an inter-device event completion.
 142  * If good, signal the caller's completion.
 143  */
 144 static int ql_idc_cmplt_aen(struct ql_adapter *qdev)
 145 {
 146         int status;
 147         struct mbox_params *mbcp = &qdev->idc_mbc;
 148         mbcp->out_count = 4;
 149         status = ql_get_mb_sts(qdev, mbcp);
 150         if (status) {
 151                 QPRINTK(qdev, DRV, ERR,
 152                         "Could not read MPI, resetting RISC!\n");
 153                 ql_queue_fw_error(qdev);
 154         } else
 155                 /* Wake up the sleeping mpi_idc_work thread that is
 156                  * waiting for this event.
 157                  */
 158                 complete(&qdev->ide_completion);
 159
 160         return status;
 161 }
 162 static void ql_link_up(struct ql_adapter *qdev, struct mbox_params *mbcp)
 163 {
 164         mbcp->out_count = 2;
 165
 166         if (ql_get_mb_sts(qdev, mbcp))
 167                 goto exit;
 168
 169         qdev->link_status = mbcp->mbox_out[1];
 170         QPRINTK(qdev, DRV, ERR, "Link Up.\n");
 171         QPRINTK(qdev, DRV, INFO, "Link Status = 0x%.08x.\n", mbcp->mbox_out[1]);
 172         if (!netif_carrier_ok(qdev->ndev)) {
 173                 QPRINTK(qdev, LINK, INFO, "Link is Up.\n");
 174                 netif_carrier_on(qdev->ndev);
 175                 netif_wake_queue(qdev->ndev);
 176         }
 177 exit:
 178         /* Clear the MPI firmware status. */
 179         ql_write32(qdev, CSR, CSR_CMD_CLR_R2PCI_INT);
 180 }
 181
 182 static void ql_link_down(struct ql_adapter *qdev, struct mbox_params *mbcp)
 183 {
 184         mbcp->out_count = 3;
 185
 186         if (ql_get_mb_sts(qdev, mbcp)) {
 187                 QPRINTK(qdev, DRV, ERR, "Firmware did not initialize!\n");
 188                 goto exit;
 189         }
 190
 191         if (netif_carrier_ok(qdev->ndev)) {
 192                 QPRINTK(qdev, LINK, INFO, "Link is Down.\n");
 193                 netif_carrier_off(qdev->ndev);
 194                 netif_stop_queue(qdev->ndev);
 195         }
 196         QPRINTK(qdev, DRV, ERR, "Link Down.\n");
 197         QPRINTK(qdev, DRV, ERR, "Link Status = 0x%.08x.\n", mbcp->mbox_out[1]);
 198 exit:
 199         /* Clear the MPI firmware status. */
 200         ql_write32(qdev, CSR, CSR_CMD_CLR_R2PCI_INT);
 201 }
 202
 203 static void ql_init_fw_done(struct ql_adapter *qdev, struct mbox_params *mbcp)
 204 {
 205         mbcp->out_count = 2;
 206
 207         if (ql_get_mb_sts(qdev, mbcp)) {
 208                 QPRINTK(qdev, DRV, ERR, "Firmware did not initialize!\n");
 209                 goto exit;
 210         }
 211         QPRINTK(qdev, DRV, ERR, "Firmware initialized!\n");
 212         QPRINTK(qdev, DRV, ERR, "Firmware status = 0x%.08x.\n",
 213                 mbcp->mbox_out[0]);
 214         QPRINTK(qdev, DRV, ERR, "Firmware Revision  = 0x%.08x.\n",
 215                 mbcp->mbox_out[1]);
 216 exit:
 217         /* Clear the MPI firmware status. */
 218         ql_write32(qdev, CSR, CSR_CMD_CLR_R2PCI_INT);
 219 }
 220
 221 /* Process an async event and clear it unless it's an
 222  * error condition.
 223  *  This can get called iteratively from the mpi_work thread
 224  *  when events arrive via an interrupt.
 225  *  It also gets called when a mailbox command is polling for
 226  *  it's completion. */
 227 static int ql_mpi_handler(struct ql_adapter *qdev, struct mbox_params *mbcp)
 228 {
 229         int status;
 230         int orig_count = mbcp->out_count;
 231
 232         /* Just get mailbox zero for now. */
 233         mbcp->out_count = 1;
 234         status = ql_get_mb_sts(qdev, mbcp);
 235         if (status) {
 236                 QPRINTK(qdev, DRV, ERR,
 237                         "Could not read MPI, resetting ASIC!\n");
 238                 ql_queue_asic_error(qdev);
 239                 goto end;
 240         }
 241
 242         switch (mbcp->mbox_out[0]) {
 243
 244         /* This case is only active when we arrive here
 245          * as a result of issuing a mailbox command to
 246          * the firmware.
 247          */
 248         case MB_CMD_STS_INTRMDT:
 249         case MB_CMD_STS_GOOD:
 250         case MB_CMD_STS_INVLD_CMD:
 251         case MB_CMD_STS_XFC_ERR:
 252         case MB_CMD_STS_CSUM_ERR:
 253         case MB_CMD_STS_ERR:
 254         case MB_CMD_STS_PARAM_ERR:
 255                 /* We can only get mailbox status if we're polling from an
 256                  * unfinished command.  Get the rest of the status data and
 257                  * return back to the caller.
 258                  * We only end up here when we're polling for a mailbox
 259                  * command completion.
 260                  */
 261                 mbcp->out_count = orig_count;
 262                 status = ql_get_mb_sts(qdev, mbcp);
 263                 return status;
 264
 265         /* Process and inbound IDC event.
 266          * This will happen when we're trying to
 267          * change tx/rx max frame size, change pause
 268          * paramters or loopback mode.
 269          */
 270         case AEN_IDC_CMPLT:
 271         case AEN_IDC_EXT:
 272                 status = ql_idc_cmplt_aen(qdev);
 273                 break;
 274
 275         case AEN_LINK_UP:
 276                 ql_link_up(qdev, mbcp);
 277                 break;
 278
 279         case AEN_LINK_DOWN:
 280                 ql_link_down(qdev, mbcp);
 281                 break;
 282
 283         case AEN_FW_INIT_DONE:
 284                 ql_init_fw_done(qdev, mbcp);
 285                 break;
 286
 287         case AEN_FW_INIT_FAIL:
 288         case AEN_SYS_ERR:
 289                 ql_queue_fw_error(qdev);
 290                 break;
 291
 292         default:
 293                 QPRINTK(qdev, DRV, ERR,
 294                         "Unsupported AE %.08x.\n", mbcp->mbox_out[0]);
 295                 /* Clear the MPI firmware status. */
 296         }
 297 end:
 298         ql_write32(qdev, CSR, CSR_CMD_CLR_R2PCI_INT);
 299         return status;
 300 }
 301
 302 /* Execute a single mailbox command.
 303  * mbcp is a pointer to an array of u32.  Each
 304  * element in the array contains the value for it's
 305  * respective mailbox register.
 306  */
 307 static int ql_mailbox_command(struct ql_adapter *qdev, struct mbox_params *mbcp)
 308 {
 309         int status, count;
 310
 311         mutex_lock(&qdev->mpi_mutex);
 312
 313         /* Begin polled mode for MPI */
 314         ql_write32(qdev, INTR_MASK, (INTR_MASK_PI << 16));
 315
 316         /* Load the mailbox registers and wake up MPI RISC. */
 317         status = ql_exec_mb_cmd(qdev, mbcp);
 318         if (status)
 319                 goto end;
 320
 321
 322         /* If we're generating a system error, then there's nothing
 323          * to wait for.
 324          */
 325         if (mbcp->mbox_in[0] == MB_CMD_MAKE_SYS_ERR)
 326                 goto end;
 327
 328         /* Wait for the command to complete. We loop
 329          * here because some AEN might arrive while
 330          * we're waiting for the mailbox command to
 331          * complete. If more than 5 arrive then we can
 332          * assume something is wrong. */
 333         count = 5;
 334         do {
 335                 /* Wait for the interrupt to come in. */
 336                 status = ql_wait_mbx_cmd_cmplt(qdev);
 337                 if (status)
 338                         goto end;
 339
 340                 /* Process the event.  If it's an AEN, it
 341                  * will be handled in-line or a worker
 342                  * will be spawned. If it's our completion
 343                  * we will catch it below.
 344                  */
 345                 status = ql_mpi_handler(qdev, mbcp);
 346                 if (status)
 347                         goto end;
 348
 349                 /* It's either the completion for our mailbox
 350                  * command complete or an AEN.  If it's our
 351                  * completion then get out.
 352                  */
 353                 if (((mbcp->mbox_out[0] & 0x0000f000) ==
 354                                         MB_CMD_STS_GOOD) ||
 355                         ((mbcp->mbox_out[0] & 0x0000f000) ==
 356                                         MB_CMD_STS_INTRMDT))
 357                         break;
 358         } while (--count);
 359
 360         if (!count) {
 361                 QPRINTK(qdev, DRV, ERR,
 362                         "Timed out waiting for mailbox complete.\n");
 363                 status = -ETIMEDOUT;
 364                 goto end;
 365         }
 366
 367         /* Now we can clear the interrupt condition
 368          * and look at our status.
 369          */
 370         ql_write32(qdev, CSR, CSR_CMD_CLR_R2PCI_INT);
 371
 372         if (((mbcp->mbox_out[0] & 0x0000f000) !=
 373                                         MB_CMD_STS_GOOD) &&
 374                 ((mbcp->mbox_out[0] & 0x0000f000) !=
 375                                         MB_CMD_STS_INTRMDT)) {
 376                 ql_display_mb_sts(qdev, mbcp);
 377                 status = -EIO;
 378         }
 379 end:
 380         mutex_unlock(&qdev->mpi_mutex);
 381         /* End polled mode for MPI */
 382         ql_write32(qdev, INTR_MASK, (INTR_MASK_PI << 16) | INTR_MASK_PI);
 383         return status;
 384 }
 385
 386 /* Get functional state for MPI firmware.
 387  * Returns zero on success.
 388  */
 389 int ql_mb_get_fw_state(struct ql_adapter *qdev)
 390 {
 391         struct mbox_params mbc;
 392         struct mbox_params *mbcp = &mbc;
 393         int status = 0;
 394
 395         memset(mbcp, 0, sizeof(struct mbox_params));
 396
 397         mbcp->in_count = 1;
 398         mbcp->out_count = 2;
 399
 400         mbcp->mbox_in[0] = MB_CMD_GET_FW_STATE;
 401
 402         status = ql_mailbox_command(qdev, mbcp);
 403         if (status)
 404                 return status;
 405
 406         if (mbcp->mbox_out[0] != MB_CMD_STS_GOOD) {
 407                 QPRINTK(qdev, DRV, ERR,
 408                         "Failed Get Firmware State.\n");
 409                 status = -EIO;
 410         }
 411
 412         /* If bit zero is set in mbx 1 then the firmware is
 413          * running, but not initialized.  This should never
 414          * happen.
 415          */
 416         if (mbcp->mbox_out[1] & 1) {
 417                 QPRINTK(qdev, DRV, ERR,
 418                         "Firmware waiting for initialization.\n");
 419                 status = -EIO;
 420         }
 421
 422         return status;
 423 }
 424
 425 /* Get link settings and maximum frame size settings
 426  * for the current port.
 427  * Most likely will block.
 428  */
 429 static int ql_mb_set_port_cfg(struct ql_adapter *qdev)
 430 {
 431         struct mbox_params mbc;
 432         struct mbox_params *mbcp = &mbc;
 433         int status = 0;
 434
 435         memset(mbcp, 0, sizeof(struct mbox_params));
 436
 437         mbcp->in_count = 3;
 438         mbcp->out_count = 1;
 439
 440         mbcp->mbox_in[0] = MB_CMD_SET_PORT_CFG;
 441         mbcp->mbox_in[1] = qdev->link_config;
 442         mbcp->mbox_in[2] = qdev->max_frame_size;
 443
 444
 445         status = ql_mailbox_command(qdev, mbcp);
 446         if (status)
 447                 return status;
 448
 449         if (mbcp->mbox_out[0] == MB_CMD_STS_INTRMDT) {
 450                 QPRINTK(qdev, DRV, ERR,
 451                         "Port Config sent, wait for IDC.\n");
 452         } else  if (mbcp->mbox_out[0] != MB_CMD_STS_GOOD) {
 453                 QPRINTK(qdev, DRV, ERR,
 454                         "Failed Set Port Configuration.\n");
 455                 status = -EIO;
 456         }
 457         return status;
 458 }
 459
 460 /* Get link settings and maximum frame size settings
 461  * for the current port.
 462  * Most likely will block.
 463  */
 464 static int ql_mb_get_port_cfg(struct ql_adapter *qdev)
 465 {
 466         struct mbox_params mbc;
 467         struct mbox_params *mbcp = &mbc;
 468         int status = 0;
 469
 470         memset(mbcp, 0, sizeof(struct mbox_params));
 471
 472         mbcp->in_count = 1;
 473         mbcp->out_count = 3;
 474
 475         mbcp->mbox_in[0] = MB_CMD_GET_PORT_CFG;
 476
 477         status = ql_mailbox_command(qdev, mbcp);
 478         if (status)
 479                 return status;
 480
 481         if (mbcp->mbox_out[0] != MB_CMD_STS_GOOD) {
 482                 QPRINTK(qdev, DRV, ERR,
 483                         "Failed Get Port Configuration.\n");
 484                 status = -EIO;
 485         } else  {
 486                 QPRINTK(qdev, DRV, DEBUG,
 487                         "Passed Get Port Configuration.\n");
 488                 qdev->link_config = mbcp->mbox_out[1];
 489                 qdev->max_frame_size = mbcp->mbox_out[2];
 490         }
 491         return status;
 492 }
 493
 494 /* IDC - Inter Device Communication...
 495  * Some firmware commands require consent of adjacent FCOE
 496  * function.  This function waits for the OK, or a
 497  * counter-request for a little more time.i
 498  * The firmware will complete the request if the other
 499  * function doesn't respond.
 500  */
 501 static int ql_idc_wait(struct ql_adapter *qdev)
 502 {
 503         int status = -ETIMEDOUT;
 504         long wait_time = 1 * HZ;
 505         struct mbox_params *mbcp = &qdev->idc_mbc;
 506         do {
 507                 /* Wait here for the command to complete
 508                  * via the IDC process.
 509                  */
 510                 wait_time =
 511                         wait_for_completion_timeout(&qdev->ide_completion,
 512                                                         wait_time);
 513                 if (!wait_time) {
 514                         QPRINTK(qdev, DRV, ERR,
 515                                 "IDC Timeout.\n");
 516                         break;
 517                 }
 518                 /* Now examine the response from the IDC process.
 519                  * We might have a good completion or a request for
 520                  * more wait time.
 521                  */
 522                 if (mbcp->mbox_out[0] == AEN_IDC_EXT) {
 523                         QPRINTK(qdev, DRV, ERR,
 524                                 "IDC Time Extension from function.\n");
 525                         wait_time += (mbcp->mbox_out[1] >> 8) & 0x0000000f;
 526                 } else if (mbcp->mbox_out[0] == AEN_IDC_CMPLT) {
 527                         QPRINTK(qdev, DRV, ERR,
 528                                 "IDC Success.\n");
 529                         status = 0;
 530                         break;
 531                 } else {
 532                         QPRINTK(qdev, DRV, ERR,
 533                                 "IDC: Invalid State 0x%.04x.\n",
 534                                 mbcp->mbox_out[0]);
 535                         status = -EIO;
 536                         break;
 537                 }
 538         } while (wait_time);
 539
 540         return status;
 541 }
 542
 543 /* API called in work thread context to set new TX/RX
 544  * maximum frame size values to match MTU.
 545  */
 546 static int ql_set_port_cfg(struct ql_adapter *qdev)
 547 {
 548         int status;
 549         status = ql_mb_set_port_cfg(qdev);
 550         if (status)
 551                 return status;
 552         status = ql_idc_wait(qdev);
 553         return status;
 554 }
 555
 556 /* The following routines are worker threads that process
 557  * events that may sleep waiting for completion.
 558  */
 559
 560 /* This thread gets the maximum TX and RX frame size values
 561  * from the firmware and, if necessary, changes them to match
 562  * the MTU setting.
 563  */
 564 void ql_mpi_port_cfg_work(struct work_struct *work)
 565 {
 566         struct ql_adapter *qdev =
 567             container_of(work, struct ql_adapter, mpi_port_cfg_work.work);
 568         struct net_device *ndev = qdev->ndev;
 569         int status;
 570
 571         status = ql_mb_get_port_cfg(qdev);
 572         if (status) {
 573                 QPRINTK(qdev, DRV, ERR,
 574                         "Bug: Failed to get port config data.\n");
 575                 goto err;
 576         }
 577
 578         if (ndev->mtu <= 2500)
 579                 goto end;
 580         else if (qdev->link_config & CFG_JUMBO_FRAME_SIZE &&
 581                         qdev->max_frame_size ==
 582                         CFG_DEFAULT_MAX_FRAME_SIZE)
 583                 goto end;
 584
 585         qdev->link_config |=    CFG_JUMBO_FRAME_SIZE;
 586         qdev->max_frame_size = CFG_DEFAULT_MAX_FRAME_SIZE;
 587         status = ql_set_port_cfg(qdev);
 588         if (status) {
 589                 QPRINTK(qdev, DRV, ERR,
 590                         "Bug: Failed to set port config data.\n");
 591                 goto err;
 592         }
 593 end:
 594         clear_bit(QL_PORT_CFG, &qdev->flags);
 595         return;
 596 err:
 597         ql_queue_fw_error(qdev);
 598         goto end;
 599 }
 600
 601 void ql_mpi_work(struct work_struct *work)
 602 {
 603         struct ql_adapter *qdev =
 604             container_of(work, struct ql_adapter, mpi_work.work);
 605         struct mbox_params mbc;
 606         struct mbox_params *mbcp = &mbc;
 607
 608         mutex_lock(&qdev->mpi_mutex);
 609
 610         while (ql_read32(qdev, STS) & STS_PI) {
 611                 memset(mbcp, 0, sizeof(struct mbox_params));
 612                 mbcp->out_count = 1;
 613                 ql_mpi_handler(qdev, mbcp);
 614         }
 615
 616         mutex_unlock(&qdev->mpi_mutex);
 617         ql_enable_completion_interrupt(qdev, 0);
 618 }
 619
 620 void ql_mpi_reset_work(struct work_struct *work)
 621 {
 622         struct ql_adapter *qdev =
 623             container_of(work, struct ql_adapter, mpi_reset_work.work);
 624         cancel_delayed_work_sync(&qdev->mpi_work);
 625         cancel_delayed_work_sync(&qdev->mpi_port_cfg_work);
 626         ql_soft_reset_mpi_risc(qdev);
 627 }