1 /* 2 * QLogic iSCSI HBA Driver 3 * Copyright (c) 2003-2012 QLogic Corporation 4 * 5 * See LICENSE.qla4xxx for copyright and licensing details. 6 */ 7 8 #include "ql4_def.h" 9 #include "ql4_glbl.h" 10 #include "ql4_dbg.h" 11 #include "ql4_inline.h" 12 13 /** 14 * qla4xxx_copy_sense - copy sense data into cmd sense buffer 15 * @ha: Pointer to host adapter structure. 16 * @sts_entry: Pointer to status entry structure. 17 * @srb: Pointer to srb structure. 18 **/ 19 static void qla4xxx_copy_sense(struct scsi_qla_host *ha, 20 struct status_entry *sts_entry, 21 struct srb *srb) 22 { 23 struct scsi_cmnd *cmd = srb->cmd; 24 uint16_t sense_len; 25 26 memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE); 27 sense_len = le16_to_cpu(sts_entry->senseDataByteCnt); 28 if (sense_len == 0) { 29 DEBUG2(ql4_printk(KERN_INFO, ha, "scsi%ld:%d:%d:%d: %s:" 30 " sense len 0\n", ha->host_no, 31 cmd->device->channel, cmd->device->id, 32 cmd->device->lun, __func__)); 33 ha->status_srb = NULL; 34 return; 35 } 36 /* Save total available sense length, 37 * not to exceed cmd's sense buffer size */ 38 sense_len = min_t(uint16_t, sense_len, SCSI_SENSE_BUFFERSIZE); 39 srb->req_sense_ptr = cmd->sense_buffer; 40 srb->req_sense_len = sense_len; 41 42 /* Copy sense from sts_entry pkt */ 43 sense_len = min_t(uint16_t, sense_len, IOCB_MAX_SENSEDATA_LEN); 44 memcpy(cmd->sense_buffer, sts_entry->senseData, sense_len); 45 46 DEBUG2(printk(KERN_INFO "scsi%ld:%d:%d:%d: %s: sense key = %x, " 47 "ASL= %02x, ASC/ASCQ = %02x/%02x\n", ha->host_no, 48 cmd->device->channel, cmd->device->id, 49 cmd->device->lun, __func__, 50 sts_entry->senseData[2] & 0x0f, 51 sts_entry->senseData[7], 52 sts_entry->senseData[12], 53 sts_entry->senseData[13])); 54 55 DEBUG5(qla4xxx_dump_buffer(cmd->sense_buffer, sense_len)); 56 srb->flags |= SRB_GOT_SENSE; 57 58 /* Update srb, in case a sts_cont pkt follows */ 59 srb->req_sense_ptr += sense_len; 60 srb->req_sense_len -= sense_len; 61 if (srb->req_sense_len != 0) 62 ha->status_srb = srb; 63 else 64 ha->status_srb = NULL; 65 } 66 67 /** 68 * qla4xxx_status_cont_entry - Process a Status Continuations entry. 69 * @ha: SCSI driver HA context 70 * @sts_cont: Entry pointer 71 * 72 * Extended sense data. 73 */ 74 static void 75 qla4xxx_status_cont_entry(struct scsi_qla_host *ha, 76 struct status_cont_entry *sts_cont) 77 { 78 struct srb *srb = ha->status_srb; 79 struct scsi_cmnd *cmd; 80 uint16_t sense_len; 81 82 if (srb == NULL) 83 return; 84 85 cmd = srb->cmd; 86 if (cmd == NULL) { 87 DEBUG2(printk(KERN_INFO "scsi%ld: %s: Cmd already returned " 88 "back to OS srb=%p srb->state:%d\n", ha->host_no, 89 __func__, srb, srb->state)); 90 ha->status_srb = NULL; 91 return; 92 } 93 94 /* Copy sense data. */ 95 sense_len = min_t(uint16_t, srb->req_sense_len, 96 IOCB_MAX_EXT_SENSEDATA_LEN); 97 memcpy(srb->req_sense_ptr, sts_cont->ext_sense_data, sense_len); 98 DEBUG5(qla4xxx_dump_buffer(srb->req_sense_ptr, sense_len)); 99 100 srb->req_sense_ptr += sense_len; 101 srb->req_sense_len -= sense_len; 102 103 /* Place command on done queue. */ 104 if (srb->req_sense_len == 0) { 105 kref_put(&srb->srb_ref, qla4xxx_srb_compl); 106 ha->status_srb = NULL; 107 } 108 } 109 110 /** 111 * qla4xxx_status_entry - processes status IOCBs 112 * @ha: Pointer to host adapter structure. 113 * @sts_entry: Pointer to status entry structure. 114 **/ 115 static void qla4xxx_status_entry(struct scsi_qla_host *ha, 116 struct status_entry *sts_entry) 117 { 118 uint8_t scsi_status; 119 struct scsi_cmnd *cmd; 120 struct srb *srb; 121 struct ddb_entry *ddb_entry; 122 uint32_t residual; 123 124 srb = qla4xxx_del_from_active_array(ha, le32_to_cpu(sts_entry->handle)); 125 if (!srb) { 126 ql4_printk(KERN_WARNING, ha, "%s invalid status entry: " 127 "handle=0x%0x, srb=%p\n", __func__, 128 sts_entry->handle, srb); 129 if (is_qla80XX(ha)) 130 set_bit(DPC_RESET_HA_FW_CONTEXT, &ha->dpc_flags); 131 else 132 set_bit(DPC_RESET_HA, &ha->dpc_flags); 133 return; 134 } 135 136 cmd = srb->cmd; 137 if (cmd == NULL) { 138 DEBUG2(printk("scsi%ld: %s: Command already returned back to " 139 "OS pkt->handle=%d srb=%p srb->state:%d\n", 140 ha->host_no, __func__, sts_entry->handle, 141 srb, srb->state)); 142 ql4_printk(KERN_WARNING, ha, "Command is NULL:" 143 " already returned to OS (srb=%p)\n", srb); 144 return; 145 } 146 147 ddb_entry = srb->ddb; 148 if (ddb_entry == NULL) { 149 cmd->result = DID_NO_CONNECT << 16; 150 goto status_entry_exit; 151 } 152 153 residual = le32_to_cpu(sts_entry->residualByteCnt); 154 155 /* Translate ISP error to a Linux SCSI error. */ 156 scsi_status = sts_entry->scsiStatus; 157 switch (sts_entry->completionStatus) { 158 case SCS_COMPLETE: 159 160 if (sts_entry->iscsiFlags & ISCSI_FLAG_RESIDUAL_OVER) { 161 cmd->result = DID_ERROR << 16; 162 break; 163 } 164 165 if (sts_entry->iscsiFlags &ISCSI_FLAG_RESIDUAL_UNDER) { 166 scsi_set_resid(cmd, residual); 167 if (!scsi_status && ((scsi_bufflen(cmd) - residual) < 168 cmd->underflow)) { 169 170 cmd->result = DID_ERROR << 16; 171 172 DEBUG2(printk("scsi%ld:%d:%d:%d: %s: " 173 "Mid-layer Data underrun0, " 174 "xferlen = 0x%x, " 175 "residual = 0x%x\n", ha->host_no, 176 cmd->device->channel, 177 cmd->device->id, 178 cmd->device->lun, __func__, 179 scsi_bufflen(cmd), residual)); 180 break; 181 } 182 } 183 184 cmd->result = DID_OK << 16 | scsi_status; 185 186 if (scsi_status != SCSI_CHECK_CONDITION) 187 break; 188 189 /* Copy Sense Data into sense buffer. */ 190 qla4xxx_copy_sense(ha, sts_entry, srb); 191 break; 192 193 case SCS_INCOMPLETE: 194 /* Always set the status to DID_ERROR, since 195 * all conditions result in that status anyway */ 196 cmd->result = DID_ERROR << 16; 197 break; 198 199 case SCS_RESET_OCCURRED: 200 DEBUG2(printk("scsi%ld:%d:%d:%d: %s: Device RESET occurred\n", 201 ha->host_no, cmd->device->channel, 202 cmd->device->id, cmd->device->lun, __func__)); 203 204 cmd->result = DID_RESET << 16; 205 break; 206 207 case SCS_ABORTED: 208 DEBUG2(printk("scsi%ld:%d:%d:%d: %s: Abort occurred\n", 209 ha->host_no, cmd->device->channel, 210 cmd->device->id, cmd->device->lun, __func__)); 211 212 cmd->result = DID_RESET << 16; 213 break; 214 215 case SCS_TIMEOUT: 216 DEBUG2(printk(KERN_INFO "scsi%ld:%d:%d:%d: Timeout\n", 217 ha->host_no, cmd->device->channel, 218 cmd->device->id, cmd->device->lun)); 219 220 cmd->result = DID_TRANSPORT_DISRUPTED << 16; 221 222 /* 223 * Mark device missing so that we won't continue to send 224 * I/O to this device. We should get a ddb state change 225 * AEN soon. 226 */ 227 if (iscsi_is_session_online(ddb_entry->sess)) 228 qla4xxx_mark_device_missing(ddb_entry->sess); 229 break; 230 231 case SCS_DATA_UNDERRUN: 232 case SCS_DATA_OVERRUN: 233 if ((sts_entry->iscsiFlags & ISCSI_FLAG_RESIDUAL_OVER) || 234 (sts_entry->completionStatus == SCS_DATA_OVERRUN)) { 235 DEBUG2(printk("scsi%ld:%d:%d:%d: %s: " "Data overrun\n", 236 ha->host_no, 237 cmd->device->channel, cmd->device->id, 238 cmd->device->lun, __func__)); 239 240 cmd->result = DID_ERROR << 16; 241 break; 242 } 243 244 scsi_set_resid(cmd, residual); 245 246 if (sts_entry->iscsiFlags & ISCSI_FLAG_RESIDUAL_UNDER) { 247 248 /* Both the firmware and target reported UNDERRUN: 249 * 250 * MID-LAYER UNDERFLOW case: 251 * Some kernels do not properly detect midlayer 252 * underflow, so we manually check it and return 253 * ERROR if the minimum required data was not 254 * received. 255 * 256 * ALL OTHER cases: 257 * Fall thru to check scsi_status 258 */ 259 if (!scsi_status && (scsi_bufflen(cmd) - residual) < 260 cmd->underflow) { 261 DEBUG2(ql4_printk(KERN_INFO, ha, 262 "scsi%ld:%d:%d:%d: %s: Mid-layer Data underrun, xferlen = 0x%x,residual = 0x%x\n", 263 ha->host_no, 264 cmd->device->channel, 265 cmd->device->id, 266 cmd->device->lun, __func__, 267 scsi_bufflen(cmd), 268 residual)); 269 270 cmd->result = DID_ERROR << 16; 271 break; 272 } 273 274 } else if (scsi_status != SAM_STAT_TASK_SET_FULL && 275 scsi_status != SAM_STAT_BUSY) { 276 277 /* 278 * The firmware reports UNDERRUN, but the target does 279 * not report it: 280 * 281 * scsi_status | host_byte device_byte 282 * | (19:16) (7:0) 283 * ============= | ========= =========== 284 * TASK_SET_FULL | DID_OK scsi_status 285 * BUSY | DID_OK scsi_status 286 * ALL OTHERS | DID_ERROR scsi_status 287 * 288 * Note: If scsi_status is task set full or busy, 289 * then this else if would fall thru to check the 290 * scsi_status and return DID_OK. 291 */ 292 293 DEBUG2(ql4_printk(KERN_INFO, ha, 294 "scsi%ld:%d:%d:%d: %s: Dropped frame(s) detected (0x%x of 0x%x bytes).\n", 295 ha->host_no, 296 cmd->device->channel, 297 cmd->device->id, 298 cmd->device->lun, __func__, 299 residual, 300 scsi_bufflen(cmd))); 301 302 cmd->result = DID_ERROR << 16 | scsi_status; 303 goto check_scsi_status; 304 } 305 306 cmd->result = DID_OK << 16 | scsi_status; 307 308 check_scsi_status: 309 if (scsi_status == SAM_STAT_CHECK_CONDITION) 310 qla4xxx_copy_sense(ha, sts_entry, srb); 311 312 break; 313 314 case SCS_DEVICE_LOGGED_OUT: 315 case SCS_DEVICE_UNAVAILABLE: 316 DEBUG2(printk(KERN_INFO "scsi%ld:%d:%d:%d: SCS_DEVICE " 317 "state: 0x%x\n", ha->host_no, 318 cmd->device->channel, cmd->device->id, 319 cmd->device->lun, sts_entry->completionStatus)); 320 /* 321 * Mark device missing so that we won't continue to 322 * send I/O to this device. We should get a ddb 323 * state change AEN soon. 324 */ 325 if (iscsi_is_session_online(ddb_entry->sess)) 326 qla4xxx_mark_device_missing(ddb_entry->sess); 327 328 cmd->result = DID_TRANSPORT_DISRUPTED << 16; 329 break; 330 331 case SCS_QUEUE_FULL: 332 /* 333 * SCSI Mid-Layer handles device queue full 334 */ 335 cmd->result = DID_OK << 16 | sts_entry->scsiStatus; 336 DEBUG2(printk("scsi%ld:%d:%d: %s: QUEUE FULL detected " 337 "compl=%02x, scsi=%02x, state=%02x, iFlags=%02x," 338 " iResp=%02x\n", ha->host_no, cmd->device->id, 339 cmd->device->lun, __func__, 340 sts_entry->completionStatus, 341 sts_entry->scsiStatus, sts_entry->state_flags, 342 sts_entry->iscsiFlags, 343 sts_entry->iscsiResponse)); 344 break; 345 346 default: 347 cmd->result = DID_ERROR << 16; 348 break; 349 } 350 351 status_entry_exit: 352 353 /* complete the request, if not waiting for status_continuation pkt */ 354 srb->cc_stat = sts_entry->completionStatus; 355 if (ha->status_srb == NULL) 356 kref_put(&srb->srb_ref, qla4xxx_srb_compl); 357 } 358 359 /** 360 * qla4xxx_passthru_status_entry - processes passthru status IOCBs (0x3C) 361 * @ha: Pointer to host adapter structure. 362 * @sts_entry: Pointer to status entry structure. 363 **/ 364 static void qla4xxx_passthru_status_entry(struct scsi_qla_host *ha, 365 struct passthru_status *sts_entry) 366 { 367 struct iscsi_task *task; 368 struct ddb_entry *ddb_entry; 369 struct ql4_task_data *task_data; 370 struct iscsi_cls_conn *cls_conn; 371 struct iscsi_conn *conn; 372 itt_t itt; 373 uint32_t fw_ddb_index; 374 375 itt = sts_entry->handle; 376 fw_ddb_index = le32_to_cpu(sts_entry->target); 377 378 ddb_entry = qla4xxx_lookup_ddb_by_fw_index(ha, fw_ddb_index); 379 380 if (ddb_entry == NULL) { 381 ql4_printk(KERN_ERR, ha, "%s: Invalid target index = 0x%x\n", 382 __func__, sts_entry->target); 383 return; 384 } 385 386 cls_conn = ddb_entry->conn; 387 conn = cls_conn->dd_data; 388 spin_lock(&conn->session->lock); 389 task = iscsi_itt_to_task(conn, itt); 390 spin_unlock(&conn->session->lock); 391 392 if (task == NULL) { 393 ql4_printk(KERN_ERR, ha, "%s: Task is NULL\n", __func__); 394 return; 395 } 396 397 task_data = task->dd_data; 398 memcpy(&task_data->sts, sts_entry, sizeof(struct passthru_status)); 399 ha->iocb_cnt -= task_data->iocb_req_cnt; 400 queue_work(ha->task_wq, &task_data->task_work); 401 } 402 403 static struct mrb *qla4xxx_del_mrb_from_active_array(struct scsi_qla_host *ha, 404 uint32_t index) 405 { 406 struct mrb *mrb = NULL; 407 408 /* validate handle and remove from active array */ 409 if (index >= MAX_MRB) 410 return mrb; 411 412 mrb = ha->active_mrb_array[index]; 413 ha->active_mrb_array[index] = NULL; 414 if (!mrb) 415 return mrb; 416 417 /* update counters */ 418 ha->iocb_cnt -= mrb->iocb_cnt; 419 420 return mrb; 421 } 422 423 static void qla4xxx_mbox_status_entry(struct scsi_qla_host *ha, 424 struct mbox_status_iocb *mbox_sts_entry) 425 { 426 struct mrb *mrb; 427 uint32_t status; 428 uint32_t data_size; 429 430 mrb = qla4xxx_del_mrb_from_active_array(ha, 431 le32_to_cpu(mbox_sts_entry->handle)); 432 433 if (mrb == NULL) { 434 ql4_printk(KERN_WARNING, ha, "%s: mrb[%d] is null\n", __func__, 435 mbox_sts_entry->handle); 436 return; 437 } 438 439 switch (mrb->mbox_cmd) { 440 case MBOX_CMD_PING: 441 DEBUG2(ql4_printk(KERN_INFO, ha, "%s: mbox_cmd = 0x%x, " 442 "mbox_sts[0] = 0x%x, mbox_sts[6] = 0x%x\n", 443 __func__, mrb->mbox_cmd, 444 mbox_sts_entry->out_mbox[0], 445 mbox_sts_entry->out_mbox[6])); 446 447 if (mbox_sts_entry->out_mbox[0] == MBOX_STS_COMMAND_COMPLETE) 448 status = ISCSI_PING_SUCCESS; 449 else 450 status = mbox_sts_entry->out_mbox[6]; 451 452 data_size = sizeof(mbox_sts_entry->out_mbox); 453 454 qla4xxx_post_ping_evt_work(ha, status, mrb->pid, data_size, 455 (uint8_t *) mbox_sts_entry->out_mbox); 456 break; 457 458 default: 459 DEBUG2(ql4_printk(KERN_WARNING, ha, "%s: invalid mbox_cmd = " 460 "0x%x\n", __func__, mrb->mbox_cmd)); 461 } 462 463 kfree(mrb); 464 return; 465 } 466 467 /** 468 * qla4xxx_process_response_queue - process response queue completions 469 * @ha: Pointer to host adapter structure. 470 * 471 * This routine process response queue completions in interrupt context. 472 * Hardware_lock locked upon entry 473 **/ 474 void qla4xxx_process_response_queue(struct scsi_qla_host *ha) 475 { 476 uint32_t count = 0; 477 struct srb *srb = NULL; 478 struct status_entry *sts_entry; 479 480 /* Process all responses from response queue */ 481 while ((ha->response_ptr->signature != RESPONSE_PROCESSED)) { 482 sts_entry = (struct status_entry *) ha->response_ptr; 483 count++; 484 485 /* Advance pointers for next entry */ 486 if (ha->response_out == (RESPONSE_QUEUE_DEPTH - 1)) { 487 ha->response_out = 0; 488 ha->response_ptr = ha->response_ring; 489 } else { 490 ha->response_out++; 491 ha->response_ptr++; 492 } 493 494 /* process entry */ 495 switch (sts_entry->hdr.entryType) { 496 case ET_STATUS: 497 /* Common status */ 498 qla4xxx_status_entry(ha, sts_entry); 499 break; 500 501 case ET_PASSTHRU_STATUS: 502 if (sts_entry->hdr.systemDefined == SD_ISCSI_PDU) 503 qla4xxx_passthru_status_entry(ha, 504 (struct passthru_status *)sts_entry); 505 else 506 ql4_printk(KERN_ERR, ha, 507 "%s: Invalid status received\n", 508 __func__); 509 510 break; 511 512 case ET_STATUS_CONTINUATION: 513 qla4xxx_status_cont_entry(ha, 514 (struct status_cont_entry *) sts_entry); 515 break; 516 517 case ET_COMMAND: 518 /* ISP device queue is full. Command not 519 * accepted by ISP. Queue command for 520 * later */ 521 522 srb = qla4xxx_del_from_active_array(ha, 523 le32_to_cpu(sts_entry-> 524 handle)); 525 if (srb == NULL) 526 goto exit_prq_invalid_handle; 527 528 DEBUG2(printk("scsi%ld: %s: FW device queue full, " 529 "srb %p\n", ha->host_no, __func__, srb)); 530 531 /* ETRY normally by sending it back with 532 * DID_BUS_BUSY */ 533 srb->cmd->result = DID_BUS_BUSY << 16; 534 kref_put(&srb->srb_ref, qla4xxx_srb_compl); 535 break; 536 537 case ET_CONTINUE: 538 /* Just throw away the continuation entries */ 539 DEBUG2(printk("scsi%ld: %s: Continuation entry - " 540 "ignoring\n", ha->host_no, __func__)); 541 break; 542 543 case ET_MBOX_STATUS: 544 DEBUG2(ql4_printk(KERN_INFO, ha, 545 "%s: mbox status IOCB\n", __func__)); 546 qla4xxx_mbox_status_entry(ha, 547 (struct mbox_status_iocb *)sts_entry); 548 break; 549 550 default: 551 /* 552 * Invalid entry in response queue, reset RISC 553 * firmware. 554 */ 555 DEBUG2(printk("scsi%ld: %s: Invalid entry %x in " 556 "response queue \n", ha->host_no, 557 __func__, 558 sts_entry->hdr.entryType)); 559 goto exit_prq_error; 560 } 561 ((struct response *)sts_entry)->signature = RESPONSE_PROCESSED; 562 wmb(); 563 } 564 565 /* 566 * Tell ISP we're done with response(s). This also clears the interrupt. 567 */ 568 ha->isp_ops->complete_iocb(ha); 569 570 return; 571 572 exit_prq_invalid_handle: 573 DEBUG2(printk("scsi%ld: %s: Invalid handle(srb)=%p type=%x IOCS=%x\n", 574 ha->host_no, __func__, srb, sts_entry->hdr.entryType, 575 sts_entry->completionStatus)); 576 577 exit_prq_error: 578 ha->isp_ops->complete_iocb(ha); 579 set_bit(DPC_RESET_HA, &ha->dpc_flags); 580 } 581 582 /** 583 * qla4_83xx_loopback_in_progress: Is loopback in progress? 584 * @ha: Pointer to host adapter structure. 585 * @ret: 1 = loopback in progress, 0 = loopback not in progress 586 **/ 587 static int qla4_83xx_loopback_in_progress(struct scsi_qla_host *ha) 588 { 589 int rval = 1; 590 591 if (is_qla8032(ha)) { 592 if ((ha->idc_info.info2 & ENABLE_INTERNAL_LOOPBACK) || 593 (ha->idc_info.info2 & ENABLE_EXTERNAL_LOOPBACK)) { 594 DEBUG2(ql4_printk(KERN_INFO, ha, 595 "%s: Loopback diagnostics in progress\n", 596 __func__)); 597 rval = 1; 598 } else { 599 DEBUG2(ql4_printk(KERN_INFO, ha, 600 "%s: Loopback diagnostics not in progress\n", 601 __func__)); 602 rval = 0; 603 } 604 } 605 606 return rval; 607 } 608 609 /** 610 * qla4xxx_isr_decode_mailbox - decodes mailbox status 611 * @ha: Pointer to host adapter structure. 612 * @mailbox_status: Mailbox status. 613 * 614 * This routine decodes the mailbox status during the ISR. 615 * Hardware_lock locked upon entry. runs in interrupt context. 616 **/ 617 static void qla4xxx_isr_decode_mailbox(struct scsi_qla_host * ha, 618 uint32_t mbox_status) 619 { 620 int i; 621 uint32_t mbox_sts[MBOX_AEN_REG_COUNT]; 622 __le32 __iomem *mailbox_out; 623 624 if (is_qla8032(ha)) 625 mailbox_out = &ha->qla4_83xx_reg->mailbox_out[0]; 626 else if (is_qla8022(ha)) 627 mailbox_out = &ha->qla4_82xx_reg->mailbox_out[0]; 628 else 629 mailbox_out = &ha->reg->mailbox[0]; 630 631 if ((mbox_status == MBOX_STS_BUSY) || 632 (mbox_status == MBOX_STS_INTERMEDIATE_COMPLETION) || 633 (mbox_status >> 12 == MBOX_COMPLETION_STATUS)) { 634 ha->mbox_status[0] = mbox_status; 635 636 if (test_bit(AF_MBOX_COMMAND, &ha->flags)) { 637 /* 638 * Copy all mailbox registers to a temporary 639 * location and set mailbox command done flag 640 */ 641 for (i = 0; i < ha->mbox_status_count; i++) 642 ha->mbox_status[i] = readl(&mailbox_out[i]); 643 644 set_bit(AF_MBOX_COMMAND_DONE, &ha->flags); 645 646 if (test_bit(AF_MBOX_COMMAND_NOPOLL, &ha->flags)) 647 complete(&ha->mbx_intr_comp); 648 } 649 } else if (mbox_status >> 12 == MBOX_ASYNC_EVENT_STATUS) { 650 for (i = 0; i < MBOX_AEN_REG_COUNT; i++) 651 mbox_sts[i] = readl(&mailbox_out[i]); 652 653 /* Immediately process the AENs that don't require much work. 654 * Only queue the database_changed AENs */ 655 if (ha->aen_log.count < MAX_AEN_ENTRIES) { 656 for (i = 0; i < MBOX_AEN_REG_COUNT; i++) 657 ha->aen_log.entry[ha->aen_log.count].mbox_sts[i] = 658 mbox_sts[i]; 659 ha->aen_log.count++; 660 } 661 switch (mbox_status) { 662 case MBOX_ASTS_SYSTEM_ERROR: 663 /* Log Mailbox registers */ 664 ql4_printk(KERN_INFO, ha, "%s: System Err\n", __func__); 665 qla4xxx_dump_registers(ha); 666 667 if ((is_qla8022(ha) && ql4xdontresethba) || 668 (is_qla8032(ha) && qla4_83xx_idc_dontreset(ha))) { 669 DEBUG2(printk("scsi%ld: %s:Don't Reset HBA\n", 670 ha->host_no, __func__)); 671 } else { 672 set_bit(AF_GET_CRASH_RECORD, &ha->flags); 673 set_bit(DPC_RESET_HA, &ha->dpc_flags); 674 } 675 break; 676 677 case MBOX_ASTS_REQUEST_TRANSFER_ERROR: 678 case MBOX_ASTS_RESPONSE_TRANSFER_ERROR: 679 case MBOX_ASTS_NVRAM_INVALID: 680 case MBOX_ASTS_IP_ADDRESS_CHANGED: 681 case MBOX_ASTS_DHCP_LEASE_EXPIRED: 682 DEBUG2(printk("scsi%ld: AEN %04x, ERROR Status, " 683 "Reset HA\n", ha->host_no, mbox_status)); 684 if (is_qla80XX(ha)) 685 set_bit(DPC_RESET_HA_FW_CONTEXT, 686 &ha->dpc_flags); 687 else 688 set_bit(DPC_RESET_HA, &ha->dpc_flags); 689 break; 690 691 case MBOX_ASTS_LINK_UP: 692 set_bit(AF_LINK_UP, &ha->flags); 693 if (test_bit(AF_INIT_DONE, &ha->flags)) 694 set_bit(DPC_LINK_CHANGED, &ha->dpc_flags); 695 696 ql4_printk(KERN_INFO, ha, "%s: LINK UP\n", __func__); 697 qla4xxx_post_aen_work(ha, ISCSI_EVENT_LINKUP, 698 sizeof(mbox_sts), 699 (uint8_t *) mbox_sts); 700 break; 701 702 case MBOX_ASTS_LINK_DOWN: 703 clear_bit(AF_LINK_UP, &ha->flags); 704 if (test_bit(AF_INIT_DONE, &ha->flags)) { 705 set_bit(DPC_LINK_CHANGED, &ha->dpc_flags); 706 qla4xxx_wake_dpc(ha); 707 } 708 709 ql4_printk(KERN_INFO, ha, "%s: LINK DOWN\n", __func__); 710 qla4xxx_post_aen_work(ha, ISCSI_EVENT_LINKDOWN, 711 sizeof(mbox_sts), 712 (uint8_t *) mbox_sts); 713 break; 714 715 case MBOX_ASTS_HEARTBEAT: 716 ha->seconds_since_last_heartbeat = 0; 717 break; 718 719 case MBOX_ASTS_DHCP_LEASE_ACQUIRED: 720 DEBUG2(printk("scsi%ld: AEN %04x DHCP LEASE " 721 "ACQUIRED\n", ha->host_no, mbox_status)); 722 set_bit(DPC_GET_DHCP_IP_ADDR, &ha->dpc_flags); 723 break; 724 725 case MBOX_ASTS_PROTOCOL_STATISTIC_ALARM: 726 case MBOX_ASTS_SCSI_COMMAND_PDU_REJECTED: /* Target 727 * mode 728 * only */ 729 case MBOX_ASTS_UNSOLICITED_PDU_RECEIVED: /* Connection mode */ 730 case MBOX_ASTS_IPSEC_SYSTEM_FATAL_ERROR: 731 case MBOX_ASTS_SUBNET_STATE_CHANGE: 732 case MBOX_ASTS_DUPLICATE_IP: 733 /* No action */ 734 DEBUG2(printk("scsi%ld: AEN %04x\n", ha->host_no, 735 mbox_status)); 736 break; 737 738 case MBOX_ASTS_IP_ADDR_STATE_CHANGED: 739 printk("scsi%ld: AEN %04x, mbox_sts[2]=%04x, " 740 "mbox_sts[3]=%04x\n", ha->host_no, mbox_sts[0], 741 mbox_sts[2], mbox_sts[3]); 742 743 /* mbox_sts[2] = Old ACB state 744 * mbox_sts[3] = new ACB state */ 745 if ((mbox_sts[3] == ACB_STATE_VALID) && 746 ((mbox_sts[2] == ACB_STATE_TENTATIVE) || 747 (mbox_sts[2] == ACB_STATE_ACQUIRING))) 748 set_bit(DPC_GET_DHCP_IP_ADDR, &ha->dpc_flags); 749 else if ((mbox_sts[3] == ACB_STATE_ACQUIRING) && 750 (mbox_sts[2] == ACB_STATE_VALID)) { 751 if (is_qla80XX(ha)) 752 set_bit(DPC_RESET_HA_FW_CONTEXT, 753 &ha->dpc_flags); 754 else 755 set_bit(DPC_RESET_HA, &ha->dpc_flags); 756 } else if ((mbox_sts[3] == ACB_STATE_UNCONFIGURED)) 757 complete(&ha->disable_acb_comp); 758 break; 759 760 case MBOX_ASTS_MAC_ADDRESS_CHANGED: 761 case MBOX_ASTS_DNS: 762 /* No action */ 763 DEBUG2(printk(KERN_INFO "scsi%ld: AEN %04x, " 764 "mbox_sts[1]=%04x, mbox_sts[2]=%04x\n", 765 ha->host_no, mbox_sts[0], 766 mbox_sts[1], mbox_sts[2])); 767 break; 768 769 case MBOX_ASTS_SELF_TEST_FAILED: 770 case MBOX_ASTS_LOGIN_FAILED: 771 /* No action */ 772 DEBUG2(printk("scsi%ld: AEN %04x, mbox_sts[1]=%04x, " 773 "mbox_sts[2]=%04x, mbox_sts[3]=%04x\n", 774 ha->host_no, mbox_sts[0], mbox_sts[1], 775 mbox_sts[2], mbox_sts[3])); 776 break; 777 778 case MBOX_ASTS_DATABASE_CHANGED: 779 /* Queue AEN information and process it in the DPC 780 * routine */ 781 if (ha->aen_q_count > 0) { 782 783 /* decrement available counter */ 784 ha->aen_q_count--; 785 786 for (i = 0; i < MBOX_AEN_REG_COUNT; i++) 787 ha->aen_q[ha->aen_in].mbox_sts[i] = 788 mbox_sts[i]; 789 790 /* print debug message */ 791 DEBUG2(printk("scsi%ld: AEN[%d] %04x queued " 792 "mb1:0x%x mb2:0x%x mb3:0x%x " 793 "mb4:0x%x mb5:0x%x\n", 794 ha->host_no, ha->aen_in, 795 mbox_sts[0], mbox_sts[1], 796 mbox_sts[2], mbox_sts[3], 797 mbox_sts[4], mbox_sts[5])); 798 799 /* advance pointer */ 800 ha->aen_in++; 801 if (ha->aen_in == MAX_AEN_ENTRIES) 802 ha->aen_in = 0; 803 804 /* The DPC routine will process the aen */ 805 set_bit(DPC_AEN, &ha->dpc_flags); 806 } else { 807 DEBUG2(printk("scsi%ld: %s: aen %04x, queue " 808 "overflowed! AEN LOST!!\n", 809 ha->host_no, __func__, 810 mbox_sts[0])); 811 812 DEBUG2(printk("scsi%ld: DUMP AEN QUEUE\n", 813 ha->host_no)); 814 815 for (i = 0; i < MAX_AEN_ENTRIES; i++) { 816 DEBUG2(printk("AEN[%d] %04x %04x %04x " 817 "%04x\n", i, mbox_sts[0], 818 mbox_sts[1], mbox_sts[2], 819 mbox_sts[3])); 820 } 821 } 822 break; 823 824 case MBOX_ASTS_TXSCVR_INSERTED: 825 DEBUG2(printk(KERN_WARNING 826 "scsi%ld: AEN %04x Transceiver" 827 " inserted\n", ha->host_no, mbox_sts[0])); 828 break; 829 830 case MBOX_ASTS_TXSCVR_REMOVED: 831 DEBUG2(printk(KERN_WARNING 832 "scsi%ld: AEN %04x Transceiver" 833 " removed\n", ha->host_no, mbox_sts[0])); 834 break; 835 836 case MBOX_ASTS_IDC_REQUEST_NOTIFICATION: 837 { 838 uint32_t opcode; 839 if (is_qla8032(ha)) { 840 DEBUG2(ql4_printk(KERN_INFO, ha, 841 "scsi%ld: AEN %04x, mbox_sts[1]=%08x, mbox_sts[2]=%08x, mbox_sts[3]=%08x, mbox_sts[4]=%08x\n", 842 ha->host_no, mbox_sts[0], 843 mbox_sts[1], mbox_sts[2], 844 mbox_sts[3], mbox_sts[4])); 845 opcode = mbox_sts[1] >> 16; 846 if ((opcode == MBOX_CMD_SET_PORT_CONFIG) || 847 (opcode == MBOX_CMD_PORT_RESET)) { 848 set_bit(DPC_POST_IDC_ACK, 849 &ha->dpc_flags); 850 ha->idc_info.request_desc = mbox_sts[1]; 851 ha->idc_info.info1 = mbox_sts[2]; 852 ha->idc_info.info2 = mbox_sts[3]; 853 ha->idc_info.info3 = mbox_sts[4]; 854 qla4xxx_wake_dpc(ha); 855 } 856 } 857 break; 858 } 859 860 case MBOX_ASTS_IDC_COMPLETE: 861 if (is_qla8032(ha)) { 862 DEBUG2(ql4_printk(KERN_INFO, ha, 863 "scsi%ld: AEN %04x, mbox_sts[1]=%08x, mbox_sts[2]=%08x, mbox_sts[3]=%08x, mbox_sts[4]=%08x\n", 864 ha->host_no, mbox_sts[0], 865 mbox_sts[1], mbox_sts[2], 866 mbox_sts[3], mbox_sts[4])); 867 DEBUG2(ql4_printk(KERN_INFO, ha, 868 "scsi:%ld: AEN %04x IDC Complete notification\n", 869 ha->host_no, mbox_sts[0])); 870 871 if (qla4_83xx_loopback_in_progress(ha)) 872 set_bit(AF_LOOPBACK, &ha->flags); 873 else 874 clear_bit(AF_LOOPBACK, &ha->flags); 875 } 876 break; 877 878 case MBOX_ASTS_IPV6_DEFAULT_ROUTER_CHANGED: 879 DEBUG2(ql4_printk(KERN_INFO, ha, 880 "scsi%ld: AEN %04x, mbox_sts[1]=%08x, mbox_sts[2]=%08x, mbox_sts[3]=%08x, mbox_sts[4]=%08x mbox_sts[5]=%08x\n", 881 ha->host_no, mbox_sts[0], mbox_sts[1], 882 mbox_sts[2], mbox_sts[3], mbox_sts[4], 883 mbox_sts[5])); 884 DEBUG2(ql4_printk(KERN_INFO, ha, 885 "scsi%ld: AEN %04x Received IPv6 default router changed notification\n", 886 ha->host_no, mbox_sts[0])); 887 break; 888 889 case MBOX_ASTS_INITIALIZATION_FAILED: 890 DEBUG2(ql4_printk(KERN_INFO, ha, 891 "scsi%ld: AEN %04x, mbox_sts[3]=%08x\n", 892 ha->host_no, mbox_sts[0], 893 mbox_sts[3])); 894 break; 895 896 case MBOX_ASTS_SYSTEM_WARNING_EVENT: 897 DEBUG2(ql4_printk(KERN_WARNING, ha, 898 "scsi%ld: AEN %04x, mbox_sts[1]=%08x, mbox_sts[2]=%08x, mbox_sts[3]=%08x, mbox_sts[4]=%08x mbox_sts[5]=%08x\n", 899 ha->host_no, mbox_sts[0], mbox_sts[1], 900 mbox_sts[2], mbox_sts[3], mbox_sts[4], 901 mbox_sts[5])); 902 break; 903 904 case MBOX_ASTS_DCBX_CONF_CHANGE: 905 DEBUG2(ql4_printk(KERN_INFO, ha, 906 "scsi%ld: AEN %04x, mbox_sts[1]=%08x, mbox_sts[2]=%08x, mbox_sts[3]=%08x, mbox_sts[4]=%08x mbox_sts[5]=%08x\n", 907 ha->host_no, mbox_sts[0], mbox_sts[1], 908 mbox_sts[2], mbox_sts[3], mbox_sts[4], 909 mbox_sts[5])); 910 DEBUG2(ql4_printk(KERN_INFO, ha, 911 "scsi%ld: AEN %04x Received DCBX configuration changed notification\n", 912 ha->host_no, mbox_sts[0])); 913 break; 914 915 default: 916 DEBUG2(printk(KERN_WARNING 917 "scsi%ld: AEN %04x UNKNOWN\n", 918 ha->host_no, mbox_sts[0])); 919 break; 920 } 921 } else { 922 DEBUG2(printk("scsi%ld: Unknown mailbox status %08X\n", 923 ha->host_no, mbox_status)); 924 925 ha->mbox_status[0] = mbox_status; 926 } 927 } 928 929 void qla4_83xx_interrupt_service_routine(struct scsi_qla_host *ha, 930 uint32_t intr_status) 931 { 932 /* Process mailbox/asynch event interrupt.*/ 933 if (intr_status) { 934 qla4xxx_isr_decode_mailbox(ha, 935 readl(&ha->qla4_83xx_reg->mailbox_out[0])); 936 /* clear the interrupt */ 937 writel(0, &ha->qla4_83xx_reg->risc_intr); 938 } else { 939 qla4xxx_process_response_queue(ha); 940 } 941 942 /* clear the interrupt */ 943 writel(0, &ha->qla4_83xx_reg->mb_int_mask); 944 } 945 946 /** 947 * qla4_82xx_interrupt_service_routine - isr 948 * @ha: pointer to host adapter structure. 949 * 950 * This is the main interrupt service routine. 951 * hardware_lock locked upon entry. runs in interrupt context. 952 **/ 953 void qla4_82xx_interrupt_service_routine(struct scsi_qla_host *ha, 954 uint32_t intr_status) 955 { 956 /* Process response queue interrupt. */ 957 if (intr_status & HSRX_RISC_IOCB_INT) 958 qla4xxx_process_response_queue(ha); 959 960 /* Process mailbox/asynch event interrupt.*/ 961 if (intr_status & HSRX_RISC_MB_INT) 962 qla4xxx_isr_decode_mailbox(ha, 963 readl(&ha->qla4_82xx_reg->mailbox_out[0])); 964 965 /* clear the interrupt */ 966 writel(0, &ha->qla4_82xx_reg->host_int); 967 readl(&ha->qla4_82xx_reg->host_int); 968 } 969 970 /** 971 * qla4xxx_interrupt_service_routine - isr 972 * @ha: pointer to host adapter structure. 973 * 974 * This is the main interrupt service routine. 975 * hardware_lock locked upon entry. runs in interrupt context. 976 **/ 977 void qla4xxx_interrupt_service_routine(struct scsi_qla_host * ha, 978 uint32_t intr_status) 979 { 980 /* Process response queue interrupt. */ 981 if (intr_status & CSR_SCSI_COMPLETION_INTR) 982 qla4xxx_process_response_queue(ha); 983 984 /* Process mailbox/asynch event interrupt.*/ 985 if (intr_status & CSR_SCSI_PROCESSOR_INTR) { 986 qla4xxx_isr_decode_mailbox(ha, 987 readl(&ha->reg->mailbox[0])); 988 989 /* Clear Mailbox Interrupt */ 990 writel(set_rmask(CSR_SCSI_PROCESSOR_INTR), 991 &ha->reg->ctrl_status); 992 readl(&ha->reg->ctrl_status); 993 } 994 } 995 996 /** 997 * qla4_82xx_spurious_interrupt - processes spurious interrupt 998 * @ha: pointer to host adapter structure. 999 * @reqs_count: . 1000 * 1001 **/ 1002 static void qla4_82xx_spurious_interrupt(struct scsi_qla_host *ha, 1003 uint8_t reqs_count) 1004 { 1005 if (reqs_count) 1006 return; 1007 1008 DEBUG2(ql4_printk(KERN_INFO, ha, "Spurious Interrupt\n")); 1009 if (is_qla8022(ha)) { 1010 writel(0, &ha->qla4_82xx_reg->host_int); 1011 if (test_bit(AF_INTx_ENABLED, &ha->flags)) 1012 qla4_82xx_wr_32(ha, ha->nx_legacy_intr.tgt_mask_reg, 1013 0xfbff); 1014 } 1015 ha->spurious_int_count++; 1016 } 1017 1018 /** 1019 * qla4xxx_intr_handler - hardware interrupt handler. 1020 * @irq: Unused 1021 * @dev_id: Pointer to host adapter structure 1022 **/ 1023 irqreturn_t qla4xxx_intr_handler(int irq, void *dev_id) 1024 { 1025 struct scsi_qla_host *ha; 1026 uint32_t intr_status; 1027 unsigned long flags = 0; 1028 uint8_t reqs_count = 0; 1029 1030 ha = (struct scsi_qla_host *) dev_id; 1031 if (!ha) { 1032 DEBUG2(printk(KERN_INFO 1033 "qla4xxx: Interrupt with NULL host ptr\n")); 1034 return IRQ_NONE; 1035 } 1036 1037 spin_lock_irqsave(&ha->hardware_lock, flags); 1038 1039 ha->isr_count++; 1040 /* 1041 * Repeatedly service interrupts up to a maximum of 1042 * MAX_REQS_SERVICED_PER_INTR 1043 */ 1044 while (1) { 1045 /* 1046 * Read interrupt status 1047 */ 1048 if (ha->isp_ops->rd_shdw_rsp_q_in(ha) != 1049 ha->response_out) 1050 intr_status = CSR_SCSI_COMPLETION_INTR; 1051 else 1052 intr_status = readl(&ha->reg->ctrl_status); 1053 1054 if ((intr_status & 1055 (CSR_SCSI_RESET_INTR|CSR_FATAL_ERROR|INTR_PENDING)) == 0) { 1056 if (reqs_count == 0) 1057 ha->spurious_int_count++; 1058 break; 1059 } 1060 1061 if (intr_status & CSR_FATAL_ERROR) { 1062 DEBUG2(printk(KERN_INFO "scsi%ld: Fatal Error, " 1063 "Status 0x%04x\n", ha->host_no, 1064 readl(isp_port_error_status (ha)))); 1065 1066 /* Issue Soft Reset to clear this error condition. 1067 * This will prevent the RISC from repeatedly 1068 * interrupting the driver; thus, allowing the DPC to 1069 * get scheduled to continue error recovery. 1070 * NOTE: Disabling RISC interrupts does not work in 1071 * this case, as CSR_FATAL_ERROR overrides 1072 * CSR_SCSI_INTR_ENABLE */ 1073 if ((readl(&ha->reg->ctrl_status) & 1074 CSR_SCSI_RESET_INTR) == 0) { 1075 writel(set_rmask(CSR_SOFT_RESET), 1076 &ha->reg->ctrl_status); 1077 readl(&ha->reg->ctrl_status); 1078 } 1079 1080 writel(set_rmask(CSR_FATAL_ERROR), 1081 &ha->reg->ctrl_status); 1082 readl(&ha->reg->ctrl_status); 1083 1084 __qla4xxx_disable_intrs(ha); 1085 1086 set_bit(DPC_RESET_HA, &ha->dpc_flags); 1087 1088 break; 1089 } else if (intr_status & CSR_SCSI_RESET_INTR) { 1090 clear_bit(AF_ONLINE, &ha->flags); 1091 __qla4xxx_disable_intrs(ha); 1092 1093 writel(set_rmask(CSR_SCSI_RESET_INTR), 1094 &ha->reg->ctrl_status); 1095 readl(&ha->reg->ctrl_status); 1096 1097 if (!test_bit(AF_HA_REMOVAL, &ha->flags)) 1098 set_bit(DPC_RESET_HA_INTR, &ha->dpc_flags); 1099 1100 break; 1101 } else if (intr_status & INTR_PENDING) { 1102 ha->isp_ops->interrupt_service_routine(ha, intr_status); 1103 ha->total_io_count++; 1104 if (++reqs_count == MAX_REQS_SERVICED_PER_INTR) 1105 break; 1106 } 1107 } 1108 1109 spin_unlock_irqrestore(&ha->hardware_lock, flags); 1110 1111 return IRQ_HANDLED; 1112 } 1113 1114 /** 1115 * qla4_82xx_intr_handler - hardware interrupt handler. 1116 * @irq: Unused 1117 * @dev_id: Pointer to host adapter structure 1118 **/ 1119 irqreturn_t qla4_82xx_intr_handler(int irq, void *dev_id) 1120 { 1121 struct scsi_qla_host *ha = dev_id; 1122 uint32_t intr_status; 1123 uint32_t status; 1124 unsigned long flags = 0; 1125 uint8_t reqs_count = 0; 1126 1127 if (unlikely(pci_channel_offline(ha->pdev))) 1128 return IRQ_HANDLED; 1129 1130 ha->isr_count++; 1131 status = qla4_82xx_rd_32(ha, ISR_INT_VECTOR); 1132 if (!(status & ha->nx_legacy_intr.int_vec_bit)) 1133 return IRQ_NONE; 1134 1135 status = qla4_82xx_rd_32(ha, ISR_INT_STATE_REG); 1136 if (!ISR_IS_LEGACY_INTR_TRIGGERED(status)) { 1137 DEBUG7(ql4_printk(KERN_INFO, ha, 1138 "%s legacy Int not triggered\n", __func__)); 1139 return IRQ_NONE; 1140 } 1141 1142 /* clear the interrupt */ 1143 qla4_82xx_wr_32(ha, ha->nx_legacy_intr.tgt_status_reg, 0xffffffff); 1144 1145 /* read twice to ensure write is flushed */ 1146 qla4_82xx_rd_32(ha, ISR_INT_VECTOR); 1147 qla4_82xx_rd_32(ha, ISR_INT_VECTOR); 1148 1149 spin_lock_irqsave(&ha->hardware_lock, flags); 1150 while (1) { 1151 if (!(readl(&ha->qla4_82xx_reg->host_int) & 1152 ISRX_82XX_RISC_INT)) { 1153 qla4_82xx_spurious_interrupt(ha, reqs_count); 1154 break; 1155 } 1156 intr_status = readl(&ha->qla4_82xx_reg->host_status); 1157 if ((intr_status & 1158 (HSRX_RISC_MB_INT | HSRX_RISC_IOCB_INT)) == 0) { 1159 qla4_82xx_spurious_interrupt(ha, reqs_count); 1160 break; 1161 } 1162 1163 ha->isp_ops->interrupt_service_routine(ha, intr_status); 1164 1165 /* Enable Interrupt */ 1166 qla4_82xx_wr_32(ha, ha->nx_legacy_intr.tgt_mask_reg, 0xfbff); 1167 1168 if (++reqs_count == MAX_REQS_SERVICED_PER_INTR) 1169 break; 1170 } 1171 1172 spin_unlock_irqrestore(&ha->hardware_lock, flags); 1173 return IRQ_HANDLED; 1174 } 1175 1176 #define LEG_INT_PTR_B31 (1 << 31) 1177 #define LEG_INT_PTR_B30 (1 << 30) 1178 #define PF_BITS_MASK (0xF << 16) 1179 1180 /** 1181 * qla4_83xx_intr_handler - hardware interrupt handler. 1182 * @irq: Unused 1183 * @dev_id: Pointer to host adapter structure 1184 **/ 1185 irqreturn_t qla4_83xx_intr_handler(int irq, void *dev_id) 1186 { 1187 struct scsi_qla_host *ha = dev_id; 1188 uint32_t leg_int_ptr = 0; 1189 unsigned long flags = 0; 1190 1191 ha->isr_count++; 1192 leg_int_ptr = readl(&ha->qla4_83xx_reg->leg_int_ptr); 1193 1194 /* Legacy interrupt is valid if bit31 of leg_int_ptr is set */ 1195 if (!(leg_int_ptr & LEG_INT_PTR_B31)) { 1196 DEBUG7(ql4_printk(KERN_ERR, ha, 1197 "%s: Legacy Interrupt Bit 31 not set, spurious interrupt!\n", 1198 __func__)); 1199 return IRQ_NONE; 1200 } 1201 1202 /* Validate the PCIE function ID set in leg_int_ptr bits [19..16] */ 1203 if ((leg_int_ptr & PF_BITS_MASK) != ha->pf_bit) { 1204 DEBUG7(ql4_printk(KERN_ERR, ha, 1205 "%s: Incorrect function ID 0x%x in legacy interrupt register, ha->pf_bit = 0x%x\n", 1206 __func__, (leg_int_ptr & PF_BITS_MASK), 1207 ha->pf_bit)); 1208 return IRQ_NONE; 1209 } 1210 1211 /* To de-assert legacy interrupt, write 0 to Legacy Interrupt Trigger 1212 * Control register and poll till Legacy Interrupt Pointer register 1213 * bit30 is 0. 1214 */ 1215 writel(0, &ha->qla4_83xx_reg->leg_int_trig); 1216 do { 1217 leg_int_ptr = readl(&ha->qla4_83xx_reg->leg_int_ptr); 1218 if ((leg_int_ptr & PF_BITS_MASK) != ha->pf_bit) 1219 break; 1220 } while (leg_int_ptr & LEG_INT_PTR_B30); 1221 1222 spin_lock_irqsave(&ha->hardware_lock, flags); 1223 leg_int_ptr = readl(&ha->qla4_83xx_reg->risc_intr); 1224 ha->isp_ops->interrupt_service_routine(ha, leg_int_ptr); 1225 spin_unlock_irqrestore(&ha->hardware_lock, flags); 1226 1227 return IRQ_HANDLED; 1228 } 1229 1230 irqreturn_t 1231 qla4_8xxx_msi_handler(int irq, void *dev_id) 1232 { 1233 struct scsi_qla_host *ha; 1234 1235 ha = (struct scsi_qla_host *) dev_id; 1236 if (!ha) { 1237 DEBUG2(printk(KERN_INFO 1238 "qla4xxx: MSIX: Interrupt with NULL host ptr\n")); 1239 return IRQ_NONE; 1240 } 1241 1242 ha->isr_count++; 1243 /* clear the interrupt */ 1244 qla4_82xx_wr_32(ha, ha->nx_legacy_intr.tgt_status_reg, 0xffffffff); 1245 1246 /* read twice to ensure write is flushed */ 1247 qla4_82xx_rd_32(ha, ISR_INT_VECTOR); 1248 qla4_82xx_rd_32(ha, ISR_INT_VECTOR); 1249 1250 return qla4_8xxx_default_intr_handler(irq, dev_id); 1251 } 1252 1253 static irqreturn_t qla4_83xx_mailbox_intr_handler(int irq, void *dev_id) 1254 { 1255 struct scsi_qla_host *ha = dev_id; 1256 unsigned long flags; 1257 uint32_t ival = 0; 1258 1259 spin_lock_irqsave(&ha->hardware_lock, flags); 1260 1261 ival = readl(&ha->qla4_83xx_reg->risc_intr); 1262 if (ival == 0) { 1263 ql4_printk(KERN_INFO, ha, 1264 "%s: It is a spurious mailbox interrupt!\n", 1265 __func__); 1266 ival = readl(&ha->qla4_83xx_reg->mb_int_mask); 1267 ival &= ~INT_MASK_FW_MB; 1268 writel(ival, &ha->qla4_83xx_reg->mb_int_mask); 1269 goto exit; 1270 } 1271 1272 qla4xxx_isr_decode_mailbox(ha, 1273 readl(&ha->qla4_83xx_reg->mailbox_out[0])); 1274 writel(0, &ha->qla4_83xx_reg->risc_intr); 1275 ival = readl(&ha->qla4_83xx_reg->mb_int_mask); 1276 ival &= ~INT_MASK_FW_MB; 1277 writel(ival, &ha->qla4_83xx_reg->mb_int_mask); 1278 ha->isr_count++; 1279 exit: 1280 spin_unlock_irqrestore(&ha->hardware_lock, flags); 1281 return IRQ_HANDLED; 1282 } 1283 1284 /** 1285 * qla4_8xxx_default_intr_handler - hardware interrupt handler. 1286 * @irq: Unused 1287 * @dev_id: Pointer to host adapter structure 1288 * 1289 * This interrupt handler is called directly for MSI-X, and 1290 * called indirectly for MSI. 1291 **/ 1292 irqreturn_t 1293 qla4_8xxx_default_intr_handler(int irq, void *dev_id) 1294 { 1295 struct scsi_qla_host *ha = dev_id; 1296 unsigned long flags; 1297 uint32_t intr_status; 1298 uint8_t reqs_count = 0; 1299 1300 if (is_qla8032(ha)) { 1301 qla4_83xx_mailbox_intr_handler(irq, dev_id); 1302 } else { 1303 spin_lock_irqsave(&ha->hardware_lock, flags); 1304 while (1) { 1305 if (!(readl(&ha->qla4_82xx_reg->host_int) & 1306 ISRX_82XX_RISC_INT)) { 1307 qla4_82xx_spurious_interrupt(ha, reqs_count); 1308 break; 1309 } 1310 1311 intr_status = readl(&ha->qla4_82xx_reg->host_status); 1312 if ((intr_status & 1313 (HSRX_RISC_MB_INT | HSRX_RISC_IOCB_INT)) == 0) { 1314 qla4_82xx_spurious_interrupt(ha, reqs_count); 1315 break; 1316 } 1317 1318 ha->isp_ops->interrupt_service_routine(ha, intr_status); 1319 1320 if (++reqs_count == MAX_REQS_SERVICED_PER_INTR) 1321 break; 1322 } 1323 ha->isr_count++; 1324 spin_unlock_irqrestore(&ha->hardware_lock, flags); 1325 } 1326 return IRQ_HANDLED; 1327 } 1328 1329 irqreturn_t 1330 qla4_8xxx_msix_rsp_q(int irq, void *dev_id) 1331 { 1332 struct scsi_qla_host *ha = dev_id; 1333 unsigned long flags; 1334 uint32_t ival = 0; 1335 1336 spin_lock_irqsave(&ha->hardware_lock, flags); 1337 if (is_qla8032(ha)) { 1338 ival = readl(&ha->qla4_83xx_reg->iocb_int_mask); 1339 if (ival == 0) { 1340 ql4_printk(KERN_INFO, ha, "%s: It is a spurious iocb interrupt!\n", 1341 __func__); 1342 goto exit_msix_rsp_q; 1343 } 1344 qla4xxx_process_response_queue(ha); 1345 writel(0, &ha->qla4_83xx_reg->iocb_int_mask); 1346 } else { 1347 qla4xxx_process_response_queue(ha); 1348 writel(0, &ha->qla4_82xx_reg->host_int); 1349 } 1350 ha->isr_count++; 1351 exit_msix_rsp_q: 1352 spin_unlock_irqrestore(&ha->hardware_lock, flags); 1353 return IRQ_HANDLED; 1354 } 1355 1356 /** 1357 * qla4xxx_process_aen - processes AENs generated by firmware 1358 * @ha: pointer to host adapter structure. 1359 * @process_aen: type of AENs to process 1360 * 1361 * Processes specific types of Asynchronous Events generated by firmware. 1362 * The type of AENs to process is specified by process_aen and can be 1363 * PROCESS_ALL_AENS 0 1364 * FLUSH_DDB_CHANGED_AENS 1 1365 * RELOGIN_DDB_CHANGED_AENS 2 1366 **/ 1367 void qla4xxx_process_aen(struct scsi_qla_host * ha, uint8_t process_aen) 1368 { 1369 uint32_t mbox_sts[MBOX_AEN_REG_COUNT]; 1370 struct aen *aen; 1371 int i; 1372 unsigned long flags; 1373 1374 spin_lock_irqsave(&ha->hardware_lock, flags); 1375 while (ha->aen_out != ha->aen_in) { 1376 aen = &ha->aen_q[ha->aen_out]; 1377 /* copy aen information to local structure */ 1378 for (i = 0; i < MBOX_AEN_REG_COUNT; i++) 1379 mbox_sts[i] = aen->mbox_sts[i]; 1380 1381 ha->aen_q_count++; 1382 ha->aen_out++; 1383 1384 if (ha->aen_out == MAX_AEN_ENTRIES) 1385 ha->aen_out = 0; 1386 1387 spin_unlock_irqrestore(&ha->hardware_lock, flags); 1388 1389 DEBUG2(printk("qla4xxx(%ld): AEN[%d]=0x%08x, mbx1=0x%08x mbx2=0x%08x" 1390 " mbx3=0x%08x mbx4=0x%08x\n", ha->host_no, 1391 (ha->aen_out ? (ha->aen_out-1): (MAX_AEN_ENTRIES-1)), 1392 mbox_sts[0], mbox_sts[1], mbox_sts[2], 1393 mbox_sts[3], mbox_sts[4])); 1394 1395 switch (mbox_sts[0]) { 1396 case MBOX_ASTS_DATABASE_CHANGED: 1397 switch (process_aen) { 1398 case FLUSH_DDB_CHANGED_AENS: 1399 DEBUG2(printk("scsi%ld: AEN[%d] %04x, index " 1400 "[%d] state=%04x FLUSHED!\n", 1401 ha->host_no, ha->aen_out, 1402 mbox_sts[0], mbox_sts[2], 1403 mbox_sts[3])); 1404 break; 1405 case PROCESS_ALL_AENS: 1406 default: 1407 /* Specific device. */ 1408 if (mbox_sts[1] == 1) 1409 qla4xxx_process_ddb_changed(ha, 1410 mbox_sts[2], mbox_sts[3], 1411 mbox_sts[4]); 1412 break; 1413 } 1414 } 1415 spin_lock_irqsave(&ha->hardware_lock, flags); 1416 } 1417 spin_unlock_irqrestore(&ha->hardware_lock, flags); 1418 } 1419 1420 int qla4xxx_request_irqs(struct scsi_qla_host *ha) 1421 { 1422 int ret; 1423 1424 if (is_qla40XX(ha)) 1425 goto try_intx; 1426 1427 if (ql4xenablemsix == 2) { 1428 /* Note: MSI Interrupts not supported for ISP8324 */ 1429 if (is_qla8032(ha)) { 1430 ql4_printk(KERN_INFO, ha, "%s: MSI Interrupts not supported for ISP8324, Falling back-to INTx mode\n", 1431 __func__); 1432 goto try_intx; 1433 } 1434 goto try_msi; 1435 } 1436 1437 if (ql4xenablemsix == 0 || ql4xenablemsix != 1) 1438 goto try_intx; 1439 1440 /* Trying MSI-X */ 1441 ret = qla4_8xxx_enable_msix(ha); 1442 if (!ret) { 1443 DEBUG2(ql4_printk(KERN_INFO, ha, 1444 "MSI-X: Enabled (0x%X).\n", ha->revision_id)); 1445 goto irq_attached; 1446 } else { 1447 if (is_qla8032(ha)) { 1448 ql4_printk(KERN_INFO, ha, "%s: ISP8324: MSI-X: Falling back-to INTx mode. ret = %d\n", 1449 __func__, ret); 1450 goto try_intx; 1451 } 1452 } 1453 1454 ql4_printk(KERN_WARNING, ha, 1455 "MSI-X: Falling back-to MSI mode -- %d.\n", ret); 1456 1457 try_msi: 1458 /* Trying MSI */ 1459 ret = pci_enable_msi(ha->pdev); 1460 if (!ret) { 1461 ret = request_irq(ha->pdev->irq, qla4_8xxx_msi_handler, 1462 0, DRIVER_NAME, ha); 1463 if (!ret) { 1464 DEBUG2(ql4_printk(KERN_INFO, ha, "MSI: Enabled.\n")); 1465 set_bit(AF_MSI_ENABLED, &ha->flags); 1466 goto irq_attached; 1467 } else { 1468 ql4_printk(KERN_WARNING, ha, 1469 "MSI: Failed to reserve interrupt %d " 1470 "already in use.\n", ha->pdev->irq); 1471 pci_disable_msi(ha->pdev); 1472 } 1473 } 1474 1475 /* 1476 * Prevent interrupts from falling back to INTx mode in cases where 1477 * interrupts cannot get acquired through MSI-X or MSI mode. 1478 */ 1479 if (is_qla8022(ha)) { 1480 ql4_printk(KERN_WARNING, ha, "IRQ not attached -- %d.\n", ret); 1481 goto irq_not_attached; 1482 } 1483 try_intx: 1484 /* Trying INTx */ 1485 ret = request_irq(ha->pdev->irq, ha->isp_ops->intr_handler, 1486 IRQF_SHARED, DRIVER_NAME, ha); 1487 if (!ret) { 1488 DEBUG2(ql4_printk(KERN_INFO, ha, "INTx: Enabled.\n")); 1489 set_bit(AF_INTx_ENABLED, &ha->flags); 1490 goto irq_attached; 1491 1492 } else { 1493 ql4_printk(KERN_WARNING, ha, 1494 "INTx: Failed to reserve interrupt %d already in" 1495 " use.\n", ha->pdev->irq); 1496 goto irq_not_attached; 1497 } 1498 1499 irq_attached: 1500 set_bit(AF_IRQ_ATTACHED, &ha->flags); 1501 ha->host->irq = ha->pdev->irq; 1502 ql4_printk(KERN_INFO, ha, "%s: irq %d attached\n", 1503 __func__, ha->pdev->irq); 1504 irq_not_attached: 1505 return ret; 1506 } 1507 1508 void qla4xxx_free_irqs(struct scsi_qla_host *ha) 1509 { 1510 if (test_and_clear_bit(AF_IRQ_ATTACHED, &ha->flags)) { 1511 if (test_bit(AF_MSIX_ENABLED, &ha->flags)) { 1512 qla4_8xxx_disable_msix(ha); 1513 } else if (test_and_clear_bit(AF_MSI_ENABLED, &ha->flags)) { 1514 free_irq(ha->pdev->irq, ha); 1515 pci_disable_msi(ha->pdev); 1516 } else if (test_and_clear_bit(AF_INTx_ENABLED, &ha->flags)) { 1517 free_irq(ha->pdev->irq, ha); 1518 } 1519 } 1520 } 1521