1 /* 2 * QLogic iSCSI HBA Driver 3 * Copyright (c) 2003-2013 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) || is_qla8042(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 static void qla4xxx_update_ipaddr_state(struct scsi_qla_host *ha, 610 uint32_t ipaddr_idx, 611 uint32_t ipaddr_fw_state) 612 { 613 uint8_t ipaddr_state; 614 uint8_t ip_idx; 615 616 ip_idx = ipaddr_idx & 0xF; 617 ipaddr_state = qla4xxx_set_ipaddr_state((uint8_t)ipaddr_fw_state); 618 619 switch (ip_idx) { 620 case 0: 621 ha->ip_config.ipv4_addr_state = ipaddr_state; 622 break; 623 case 1: 624 ha->ip_config.ipv6_link_local_state = ipaddr_state; 625 break; 626 case 2: 627 ha->ip_config.ipv6_addr0_state = ipaddr_state; 628 break; 629 case 3: 630 ha->ip_config.ipv6_addr1_state = ipaddr_state; 631 break; 632 default: 633 ql4_printk(KERN_INFO, ha, "%s: Invalid IPADDR index %d\n", 634 __func__, ip_idx); 635 } 636 } 637 638 639 /** 640 * qla4xxx_isr_decode_mailbox - decodes mailbox status 641 * @ha: Pointer to host adapter structure. 642 * @mailbox_status: Mailbox status. 643 * 644 * This routine decodes the mailbox status during the ISR. 645 * Hardware_lock locked upon entry. runs in interrupt context. 646 **/ 647 static void qla4xxx_isr_decode_mailbox(struct scsi_qla_host * ha, 648 uint32_t mbox_status) 649 { 650 int i; 651 uint32_t mbox_sts[MBOX_AEN_REG_COUNT]; 652 __le32 __iomem *mailbox_out; 653 uint32_t opcode = 0; 654 655 if (is_qla8032(ha) || is_qla8042(ha)) 656 mailbox_out = &ha->qla4_83xx_reg->mailbox_out[0]; 657 else if (is_qla8022(ha)) 658 mailbox_out = &ha->qla4_82xx_reg->mailbox_out[0]; 659 else 660 mailbox_out = &ha->reg->mailbox[0]; 661 662 if ((mbox_status == MBOX_STS_BUSY) || 663 (mbox_status == MBOX_STS_INTERMEDIATE_COMPLETION) || 664 (mbox_status >> 12 == MBOX_COMPLETION_STATUS)) { 665 ha->mbox_status[0] = mbox_status; 666 667 if (test_bit(AF_MBOX_COMMAND, &ha->flags)) { 668 /* 669 * Copy all mailbox registers to a temporary 670 * location and set mailbox command done flag 671 */ 672 for (i = 0; i < ha->mbox_status_count; i++) 673 ha->mbox_status[i] = readl(&mailbox_out[i]); 674 675 set_bit(AF_MBOX_COMMAND_DONE, &ha->flags); 676 677 if (test_bit(AF_MBOX_COMMAND_NOPOLL, &ha->flags)) 678 complete(&ha->mbx_intr_comp); 679 } 680 } else if (mbox_status >> 12 == MBOX_ASYNC_EVENT_STATUS) { 681 for (i = 0; i < MBOX_AEN_REG_COUNT; i++) 682 mbox_sts[i] = readl(&mailbox_out[i]); 683 684 /* Immediately process the AENs that don't require much work. 685 * Only queue the database_changed AENs */ 686 if (ha->aen_log.count < MAX_AEN_ENTRIES) { 687 for (i = 0; i < MBOX_AEN_REG_COUNT; i++) 688 ha->aen_log.entry[ha->aen_log.count].mbox_sts[i] = 689 mbox_sts[i]; 690 ha->aen_log.count++; 691 } 692 switch (mbox_status) { 693 case MBOX_ASTS_SYSTEM_ERROR: 694 /* Log Mailbox registers */ 695 ql4_printk(KERN_INFO, ha, "%s: System Err\n", __func__); 696 qla4xxx_dump_registers(ha); 697 698 if ((is_qla8022(ha) && ql4xdontresethba) || 699 ((is_qla8032(ha) || is_qla8042(ha)) && 700 qla4_83xx_idc_dontreset(ha))) { 701 DEBUG2(printk("scsi%ld: %s:Don't Reset HBA\n", 702 ha->host_no, __func__)); 703 } else { 704 set_bit(AF_GET_CRASH_RECORD, &ha->flags); 705 set_bit(DPC_RESET_HA, &ha->dpc_flags); 706 } 707 break; 708 709 case MBOX_ASTS_REQUEST_TRANSFER_ERROR: 710 case MBOX_ASTS_RESPONSE_TRANSFER_ERROR: 711 case MBOX_ASTS_NVRAM_INVALID: 712 case MBOX_ASTS_IP_ADDRESS_CHANGED: 713 case MBOX_ASTS_DHCP_LEASE_EXPIRED: 714 DEBUG2(printk("scsi%ld: AEN %04x, ERROR Status, " 715 "Reset HA\n", ha->host_no, mbox_status)); 716 if (is_qla80XX(ha)) 717 set_bit(DPC_RESET_HA_FW_CONTEXT, 718 &ha->dpc_flags); 719 else 720 set_bit(DPC_RESET_HA, &ha->dpc_flags); 721 break; 722 723 case MBOX_ASTS_LINK_UP: 724 set_bit(AF_LINK_UP, &ha->flags); 725 if (test_bit(AF_INIT_DONE, &ha->flags)) 726 set_bit(DPC_LINK_CHANGED, &ha->dpc_flags); 727 728 ql4_printk(KERN_INFO, ha, "%s: LINK UP\n", __func__); 729 qla4xxx_post_aen_work(ha, ISCSI_EVENT_LINKUP, 730 sizeof(mbox_sts), 731 (uint8_t *) mbox_sts); 732 733 if ((is_qla8032(ha) || is_qla8042(ha)) && 734 ha->notify_link_up_comp) 735 complete(&ha->link_up_comp); 736 737 break; 738 739 case MBOX_ASTS_LINK_DOWN: 740 clear_bit(AF_LINK_UP, &ha->flags); 741 if (test_bit(AF_INIT_DONE, &ha->flags)) { 742 set_bit(DPC_LINK_CHANGED, &ha->dpc_flags); 743 qla4xxx_wake_dpc(ha); 744 } 745 746 ql4_printk(KERN_INFO, ha, "%s: LINK DOWN\n", __func__); 747 qla4xxx_post_aen_work(ha, ISCSI_EVENT_LINKDOWN, 748 sizeof(mbox_sts), 749 (uint8_t *) mbox_sts); 750 break; 751 752 case MBOX_ASTS_HEARTBEAT: 753 ha->seconds_since_last_heartbeat = 0; 754 break; 755 756 case MBOX_ASTS_DHCP_LEASE_ACQUIRED: 757 DEBUG2(printk("scsi%ld: AEN %04x DHCP LEASE " 758 "ACQUIRED\n", ha->host_no, mbox_status)); 759 set_bit(DPC_GET_DHCP_IP_ADDR, &ha->dpc_flags); 760 break; 761 762 case MBOX_ASTS_PROTOCOL_STATISTIC_ALARM: 763 case MBOX_ASTS_SCSI_COMMAND_PDU_REJECTED: /* Target 764 * mode 765 * only */ 766 case MBOX_ASTS_UNSOLICITED_PDU_RECEIVED: /* Connection mode */ 767 case MBOX_ASTS_IPSEC_SYSTEM_FATAL_ERROR: 768 case MBOX_ASTS_SUBNET_STATE_CHANGE: 769 case MBOX_ASTS_DUPLICATE_IP: 770 /* No action */ 771 DEBUG2(printk("scsi%ld: AEN %04x\n", ha->host_no, 772 mbox_status)); 773 break; 774 775 case MBOX_ASTS_IP_ADDR_STATE_CHANGED: 776 printk("scsi%ld: AEN %04x, mbox_sts[2]=%04x, " 777 "mbox_sts[3]=%04x\n", ha->host_no, mbox_sts[0], 778 mbox_sts[2], mbox_sts[3]); 779 780 qla4xxx_update_ipaddr_state(ha, mbox_sts[5], 781 mbox_sts[3]); 782 /* mbox_sts[2] = Old ACB state 783 * mbox_sts[3] = new ACB state */ 784 if ((mbox_sts[3] == ACB_STATE_VALID) && 785 ((mbox_sts[2] == ACB_STATE_TENTATIVE) || 786 (mbox_sts[2] == ACB_STATE_ACQUIRING))) { 787 set_bit(DPC_GET_DHCP_IP_ADDR, &ha->dpc_flags); 788 } else if ((mbox_sts[3] == ACB_STATE_ACQUIRING) && 789 (mbox_sts[2] == ACB_STATE_VALID)) { 790 if (is_qla80XX(ha)) 791 set_bit(DPC_RESET_HA_FW_CONTEXT, 792 &ha->dpc_flags); 793 else 794 set_bit(DPC_RESET_HA, &ha->dpc_flags); 795 } else if (mbox_sts[3] == ACB_STATE_DISABLING) { 796 ql4_printk(KERN_INFO, ha, "scsi%ld: %s: ACB in disabling state\n", 797 ha->host_no, __func__); 798 } else if ((mbox_sts[3] == ACB_STATE_UNCONFIGURED)) { 799 complete(&ha->disable_acb_comp); 800 ql4_printk(KERN_INFO, ha, "scsi%ld: %s: ACB state unconfigured\n", 801 ha->host_no, __func__); 802 } 803 break; 804 805 case MBOX_ASTS_MAC_ADDRESS_CHANGED: 806 case MBOX_ASTS_DNS: 807 /* No action */ 808 DEBUG2(printk(KERN_INFO "scsi%ld: AEN %04x, " 809 "mbox_sts[1]=%04x, mbox_sts[2]=%04x\n", 810 ha->host_no, mbox_sts[0], 811 mbox_sts[1], mbox_sts[2])); 812 break; 813 814 case MBOX_ASTS_SELF_TEST_FAILED: 815 case MBOX_ASTS_LOGIN_FAILED: 816 /* No action */ 817 DEBUG2(printk("scsi%ld: AEN %04x, mbox_sts[1]=%04x, " 818 "mbox_sts[2]=%04x, mbox_sts[3]=%04x\n", 819 ha->host_no, mbox_sts[0], mbox_sts[1], 820 mbox_sts[2], mbox_sts[3])); 821 break; 822 823 case MBOX_ASTS_DATABASE_CHANGED: 824 /* Queue AEN information and process it in the DPC 825 * routine */ 826 if (ha->aen_q_count > 0) { 827 828 /* decrement available counter */ 829 ha->aen_q_count--; 830 831 for (i = 0; i < MBOX_AEN_REG_COUNT; i++) 832 ha->aen_q[ha->aen_in].mbox_sts[i] = 833 mbox_sts[i]; 834 835 /* print debug message */ 836 DEBUG2(printk("scsi%ld: AEN[%d] %04x queued " 837 "mb1:0x%x mb2:0x%x mb3:0x%x " 838 "mb4:0x%x mb5:0x%x\n", 839 ha->host_no, ha->aen_in, 840 mbox_sts[0], mbox_sts[1], 841 mbox_sts[2], mbox_sts[3], 842 mbox_sts[4], mbox_sts[5])); 843 844 /* advance pointer */ 845 ha->aen_in++; 846 if (ha->aen_in == MAX_AEN_ENTRIES) 847 ha->aen_in = 0; 848 849 /* The DPC routine will process the aen */ 850 set_bit(DPC_AEN, &ha->dpc_flags); 851 } else { 852 DEBUG2(printk("scsi%ld: %s: aen %04x, queue " 853 "overflowed! AEN LOST!!\n", 854 ha->host_no, __func__, 855 mbox_sts[0])); 856 857 DEBUG2(printk("scsi%ld: DUMP AEN QUEUE\n", 858 ha->host_no)); 859 860 for (i = 0; i < MAX_AEN_ENTRIES; i++) { 861 DEBUG2(printk("AEN[%d] %04x %04x %04x " 862 "%04x\n", i, mbox_sts[0], 863 mbox_sts[1], mbox_sts[2], 864 mbox_sts[3])); 865 } 866 } 867 break; 868 869 case MBOX_ASTS_TXSCVR_INSERTED: 870 DEBUG2(printk(KERN_WARNING 871 "scsi%ld: AEN %04x Transceiver" 872 " inserted\n", ha->host_no, mbox_sts[0])); 873 break; 874 875 case MBOX_ASTS_TXSCVR_REMOVED: 876 DEBUG2(printk(KERN_WARNING 877 "scsi%ld: AEN %04x Transceiver" 878 " removed\n", ha->host_no, mbox_sts[0])); 879 break; 880 881 case MBOX_ASTS_IDC_REQUEST_NOTIFICATION: 882 if (is_qla8032(ha) || is_qla8042(ha)) { 883 DEBUG2(ql4_printk(KERN_INFO, ha, 884 "scsi%ld: AEN %04x, mbox_sts[1]=%08x, mbox_sts[2]=%08x, mbox_sts[3]=%08x, mbox_sts[4]=%08x\n", 885 ha->host_no, mbox_sts[0], 886 mbox_sts[1], mbox_sts[2], 887 mbox_sts[3], mbox_sts[4])); 888 opcode = mbox_sts[1] >> 16; 889 if ((opcode == MBOX_CMD_SET_PORT_CONFIG) || 890 (opcode == MBOX_CMD_PORT_RESET)) { 891 set_bit(DPC_POST_IDC_ACK, 892 &ha->dpc_flags); 893 ha->idc_info.request_desc = mbox_sts[1]; 894 ha->idc_info.info1 = mbox_sts[2]; 895 ha->idc_info.info2 = mbox_sts[3]; 896 ha->idc_info.info3 = mbox_sts[4]; 897 qla4xxx_wake_dpc(ha); 898 } 899 } 900 break; 901 902 case MBOX_ASTS_IDC_COMPLETE: 903 if (is_qla8032(ha) || is_qla8042(ha)) { 904 DEBUG2(ql4_printk(KERN_INFO, ha, 905 "scsi%ld: AEN %04x, mbox_sts[1]=%08x, mbox_sts[2]=%08x, mbox_sts[3]=%08x, mbox_sts[4]=%08x\n", 906 ha->host_no, mbox_sts[0], 907 mbox_sts[1], mbox_sts[2], 908 mbox_sts[3], mbox_sts[4])); 909 DEBUG2(ql4_printk(KERN_INFO, ha, 910 "scsi:%ld: AEN %04x IDC Complete notification\n", 911 ha->host_no, mbox_sts[0])); 912 913 opcode = mbox_sts[1] >> 16; 914 if (ha->notify_idc_comp) 915 complete(&ha->idc_comp); 916 917 if ((opcode == MBOX_CMD_SET_PORT_CONFIG) || 918 (opcode == MBOX_CMD_PORT_RESET)) 919 ha->idc_info.info2 = mbox_sts[3]; 920 921 if (qla4_83xx_loopback_in_progress(ha)) { 922 set_bit(AF_LOOPBACK, &ha->flags); 923 } else { 924 clear_bit(AF_LOOPBACK, &ha->flags); 925 if (ha->saved_acb) 926 set_bit(DPC_RESTORE_ACB, 927 &ha->dpc_flags); 928 } 929 qla4xxx_wake_dpc(ha); 930 } 931 break; 932 933 case MBOX_ASTS_IPV6_DEFAULT_ROUTER_CHANGED: 934 DEBUG2(ql4_printk(KERN_INFO, ha, 935 "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", 936 ha->host_no, mbox_sts[0], mbox_sts[1], 937 mbox_sts[2], mbox_sts[3], mbox_sts[4], 938 mbox_sts[5])); 939 DEBUG2(ql4_printk(KERN_INFO, ha, 940 "scsi%ld: AEN %04x Received IPv6 default router changed notification\n", 941 ha->host_no, mbox_sts[0])); 942 break; 943 944 case MBOX_ASTS_IDC_TIME_EXTEND_NOTIFICATION: 945 DEBUG2(ql4_printk(KERN_INFO, ha, 946 "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", 947 ha->host_no, mbox_sts[0], mbox_sts[1], 948 mbox_sts[2], mbox_sts[3], mbox_sts[4], 949 mbox_sts[5])); 950 DEBUG2(ql4_printk(KERN_INFO, ha, 951 "scsi%ld: AEN %04x Received IDC Extend Timeout notification\n", 952 ha->host_no, mbox_sts[0])); 953 /* new IDC timeout */ 954 ha->idc_extend_tmo = mbox_sts[1]; 955 break; 956 957 case MBOX_ASTS_INITIALIZATION_FAILED: 958 DEBUG2(ql4_printk(KERN_INFO, ha, 959 "scsi%ld: AEN %04x, mbox_sts[3]=%08x\n", 960 ha->host_no, mbox_sts[0], 961 mbox_sts[3])); 962 break; 963 964 case MBOX_ASTS_SYSTEM_WARNING_EVENT: 965 DEBUG2(ql4_printk(KERN_WARNING, ha, 966 "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", 967 ha->host_no, mbox_sts[0], mbox_sts[1], 968 mbox_sts[2], mbox_sts[3], mbox_sts[4], 969 mbox_sts[5])); 970 break; 971 972 case MBOX_ASTS_DCBX_CONF_CHANGE: 973 DEBUG2(ql4_printk(KERN_INFO, ha, 974 "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", 975 ha->host_no, mbox_sts[0], mbox_sts[1], 976 mbox_sts[2], mbox_sts[3], mbox_sts[4], 977 mbox_sts[5])); 978 DEBUG2(ql4_printk(KERN_INFO, ha, 979 "scsi%ld: AEN %04x Received DCBX configuration changed notification\n", 980 ha->host_no, mbox_sts[0])); 981 break; 982 983 default: 984 DEBUG2(printk(KERN_WARNING 985 "scsi%ld: AEN %04x UNKNOWN\n", 986 ha->host_no, mbox_sts[0])); 987 break; 988 } 989 } else { 990 DEBUG2(printk("scsi%ld: Unknown mailbox status %08X\n", 991 ha->host_no, mbox_status)); 992 993 ha->mbox_status[0] = mbox_status; 994 } 995 } 996 997 void qla4_83xx_interrupt_service_routine(struct scsi_qla_host *ha, 998 uint32_t intr_status) 999 { 1000 /* Process mailbox/asynch event interrupt.*/ 1001 if (intr_status) { 1002 qla4xxx_isr_decode_mailbox(ha, 1003 readl(&ha->qla4_83xx_reg->mailbox_out[0])); 1004 /* clear the interrupt */ 1005 writel(0, &ha->qla4_83xx_reg->risc_intr); 1006 } else { 1007 qla4xxx_process_response_queue(ha); 1008 } 1009 1010 /* clear the interrupt */ 1011 writel(0, &ha->qla4_83xx_reg->mb_int_mask); 1012 } 1013 1014 /** 1015 * qla4_82xx_interrupt_service_routine - isr 1016 * @ha: pointer to host adapter structure. 1017 * 1018 * This is the main interrupt service routine. 1019 * hardware_lock locked upon entry. runs in interrupt context. 1020 **/ 1021 void qla4_82xx_interrupt_service_routine(struct scsi_qla_host *ha, 1022 uint32_t intr_status) 1023 { 1024 /* Process response queue interrupt. */ 1025 if (intr_status & HSRX_RISC_IOCB_INT) 1026 qla4xxx_process_response_queue(ha); 1027 1028 /* Process mailbox/asynch event interrupt.*/ 1029 if (intr_status & HSRX_RISC_MB_INT) 1030 qla4xxx_isr_decode_mailbox(ha, 1031 readl(&ha->qla4_82xx_reg->mailbox_out[0])); 1032 1033 /* clear the interrupt */ 1034 writel(0, &ha->qla4_82xx_reg->host_int); 1035 readl(&ha->qla4_82xx_reg->host_int); 1036 } 1037 1038 /** 1039 * qla4xxx_interrupt_service_routine - isr 1040 * @ha: pointer to host adapter structure. 1041 * 1042 * This is the main interrupt service routine. 1043 * hardware_lock locked upon entry. runs in interrupt context. 1044 **/ 1045 void qla4xxx_interrupt_service_routine(struct scsi_qla_host * ha, 1046 uint32_t intr_status) 1047 { 1048 /* Process response queue interrupt. */ 1049 if (intr_status & CSR_SCSI_COMPLETION_INTR) 1050 qla4xxx_process_response_queue(ha); 1051 1052 /* Process mailbox/asynch event interrupt.*/ 1053 if (intr_status & CSR_SCSI_PROCESSOR_INTR) { 1054 qla4xxx_isr_decode_mailbox(ha, 1055 readl(&ha->reg->mailbox[0])); 1056 1057 /* Clear Mailbox Interrupt */ 1058 writel(set_rmask(CSR_SCSI_PROCESSOR_INTR), 1059 &ha->reg->ctrl_status); 1060 readl(&ha->reg->ctrl_status); 1061 } 1062 } 1063 1064 /** 1065 * qla4_82xx_spurious_interrupt - processes spurious interrupt 1066 * @ha: pointer to host adapter structure. 1067 * @reqs_count: . 1068 * 1069 **/ 1070 static void qla4_82xx_spurious_interrupt(struct scsi_qla_host *ha, 1071 uint8_t reqs_count) 1072 { 1073 if (reqs_count) 1074 return; 1075 1076 DEBUG2(ql4_printk(KERN_INFO, ha, "Spurious Interrupt\n")); 1077 if (is_qla8022(ha)) { 1078 writel(0, &ha->qla4_82xx_reg->host_int); 1079 if (test_bit(AF_INTx_ENABLED, &ha->flags)) 1080 qla4_82xx_wr_32(ha, ha->nx_legacy_intr.tgt_mask_reg, 1081 0xfbff); 1082 } 1083 ha->spurious_int_count++; 1084 } 1085 1086 /** 1087 * qla4xxx_intr_handler - hardware interrupt handler. 1088 * @irq: Unused 1089 * @dev_id: Pointer to host adapter structure 1090 **/ 1091 irqreturn_t qla4xxx_intr_handler(int irq, void *dev_id) 1092 { 1093 struct scsi_qla_host *ha; 1094 uint32_t intr_status; 1095 unsigned long flags = 0; 1096 uint8_t reqs_count = 0; 1097 1098 ha = (struct scsi_qla_host *) dev_id; 1099 if (!ha) { 1100 DEBUG2(printk(KERN_INFO 1101 "qla4xxx: Interrupt with NULL host ptr\n")); 1102 return IRQ_NONE; 1103 } 1104 1105 spin_lock_irqsave(&ha->hardware_lock, flags); 1106 1107 ha->isr_count++; 1108 /* 1109 * Repeatedly service interrupts up to a maximum of 1110 * MAX_REQS_SERVICED_PER_INTR 1111 */ 1112 while (1) { 1113 /* 1114 * Read interrupt status 1115 */ 1116 if (ha->isp_ops->rd_shdw_rsp_q_in(ha) != 1117 ha->response_out) 1118 intr_status = CSR_SCSI_COMPLETION_INTR; 1119 else 1120 intr_status = readl(&ha->reg->ctrl_status); 1121 1122 if ((intr_status & 1123 (CSR_SCSI_RESET_INTR|CSR_FATAL_ERROR|INTR_PENDING)) == 0) { 1124 if (reqs_count == 0) 1125 ha->spurious_int_count++; 1126 break; 1127 } 1128 1129 if (intr_status & CSR_FATAL_ERROR) { 1130 DEBUG2(printk(KERN_INFO "scsi%ld: Fatal Error, " 1131 "Status 0x%04x\n", ha->host_no, 1132 readl(isp_port_error_status (ha)))); 1133 1134 /* Issue Soft Reset to clear this error condition. 1135 * This will prevent the RISC from repeatedly 1136 * interrupting the driver; thus, allowing the DPC to 1137 * get scheduled to continue error recovery. 1138 * NOTE: Disabling RISC interrupts does not work in 1139 * this case, as CSR_FATAL_ERROR overrides 1140 * CSR_SCSI_INTR_ENABLE */ 1141 if ((readl(&ha->reg->ctrl_status) & 1142 CSR_SCSI_RESET_INTR) == 0) { 1143 writel(set_rmask(CSR_SOFT_RESET), 1144 &ha->reg->ctrl_status); 1145 readl(&ha->reg->ctrl_status); 1146 } 1147 1148 writel(set_rmask(CSR_FATAL_ERROR), 1149 &ha->reg->ctrl_status); 1150 readl(&ha->reg->ctrl_status); 1151 1152 __qla4xxx_disable_intrs(ha); 1153 1154 set_bit(DPC_RESET_HA, &ha->dpc_flags); 1155 1156 break; 1157 } else if (intr_status & CSR_SCSI_RESET_INTR) { 1158 clear_bit(AF_ONLINE, &ha->flags); 1159 __qla4xxx_disable_intrs(ha); 1160 1161 writel(set_rmask(CSR_SCSI_RESET_INTR), 1162 &ha->reg->ctrl_status); 1163 readl(&ha->reg->ctrl_status); 1164 1165 if (!test_bit(AF_HA_REMOVAL, &ha->flags)) 1166 set_bit(DPC_RESET_HA_INTR, &ha->dpc_flags); 1167 1168 break; 1169 } else if (intr_status & INTR_PENDING) { 1170 ha->isp_ops->interrupt_service_routine(ha, intr_status); 1171 ha->total_io_count++; 1172 if (++reqs_count == MAX_REQS_SERVICED_PER_INTR) 1173 break; 1174 } 1175 } 1176 1177 spin_unlock_irqrestore(&ha->hardware_lock, flags); 1178 1179 return IRQ_HANDLED; 1180 } 1181 1182 /** 1183 * qla4_82xx_intr_handler - hardware interrupt handler. 1184 * @irq: Unused 1185 * @dev_id: Pointer to host adapter structure 1186 **/ 1187 irqreturn_t qla4_82xx_intr_handler(int irq, void *dev_id) 1188 { 1189 struct scsi_qla_host *ha = dev_id; 1190 uint32_t intr_status; 1191 uint32_t status; 1192 unsigned long flags = 0; 1193 uint8_t reqs_count = 0; 1194 1195 if (unlikely(pci_channel_offline(ha->pdev))) 1196 return IRQ_HANDLED; 1197 1198 ha->isr_count++; 1199 status = qla4_82xx_rd_32(ha, ISR_INT_VECTOR); 1200 if (!(status & ha->nx_legacy_intr.int_vec_bit)) 1201 return IRQ_NONE; 1202 1203 status = qla4_82xx_rd_32(ha, ISR_INT_STATE_REG); 1204 if (!ISR_IS_LEGACY_INTR_TRIGGERED(status)) { 1205 DEBUG7(ql4_printk(KERN_INFO, ha, 1206 "%s legacy Int not triggered\n", __func__)); 1207 return IRQ_NONE; 1208 } 1209 1210 /* clear the interrupt */ 1211 qla4_82xx_wr_32(ha, ha->nx_legacy_intr.tgt_status_reg, 0xffffffff); 1212 1213 /* read twice to ensure write is flushed */ 1214 qla4_82xx_rd_32(ha, ISR_INT_VECTOR); 1215 qla4_82xx_rd_32(ha, ISR_INT_VECTOR); 1216 1217 spin_lock_irqsave(&ha->hardware_lock, flags); 1218 while (1) { 1219 if (!(readl(&ha->qla4_82xx_reg->host_int) & 1220 ISRX_82XX_RISC_INT)) { 1221 qla4_82xx_spurious_interrupt(ha, reqs_count); 1222 break; 1223 } 1224 intr_status = readl(&ha->qla4_82xx_reg->host_status); 1225 if ((intr_status & 1226 (HSRX_RISC_MB_INT | HSRX_RISC_IOCB_INT)) == 0) { 1227 qla4_82xx_spurious_interrupt(ha, reqs_count); 1228 break; 1229 } 1230 1231 ha->isp_ops->interrupt_service_routine(ha, intr_status); 1232 1233 /* Enable Interrupt */ 1234 qla4_82xx_wr_32(ha, ha->nx_legacy_intr.tgt_mask_reg, 0xfbff); 1235 1236 if (++reqs_count == MAX_REQS_SERVICED_PER_INTR) 1237 break; 1238 } 1239 1240 spin_unlock_irqrestore(&ha->hardware_lock, flags); 1241 return IRQ_HANDLED; 1242 } 1243 1244 #define LEG_INT_PTR_B31 (1 << 31) 1245 #define LEG_INT_PTR_B30 (1 << 30) 1246 #define PF_BITS_MASK (0xF << 16) 1247 1248 /** 1249 * qla4_83xx_intr_handler - hardware interrupt handler. 1250 * @irq: Unused 1251 * @dev_id: Pointer to host adapter structure 1252 **/ 1253 irqreturn_t qla4_83xx_intr_handler(int irq, void *dev_id) 1254 { 1255 struct scsi_qla_host *ha = dev_id; 1256 uint32_t leg_int_ptr = 0; 1257 unsigned long flags = 0; 1258 1259 ha->isr_count++; 1260 leg_int_ptr = readl(&ha->qla4_83xx_reg->leg_int_ptr); 1261 1262 /* Legacy interrupt is valid if bit31 of leg_int_ptr is set */ 1263 if (!(leg_int_ptr & LEG_INT_PTR_B31)) { 1264 DEBUG7(ql4_printk(KERN_ERR, ha, 1265 "%s: Legacy Interrupt Bit 31 not set, spurious interrupt!\n", 1266 __func__)); 1267 return IRQ_NONE; 1268 } 1269 1270 /* Validate the PCIE function ID set in leg_int_ptr bits [19..16] */ 1271 if ((leg_int_ptr & PF_BITS_MASK) != ha->pf_bit) { 1272 DEBUG7(ql4_printk(KERN_ERR, ha, 1273 "%s: Incorrect function ID 0x%x in legacy interrupt register, ha->pf_bit = 0x%x\n", 1274 __func__, (leg_int_ptr & PF_BITS_MASK), 1275 ha->pf_bit)); 1276 return IRQ_NONE; 1277 } 1278 1279 /* To de-assert legacy interrupt, write 0 to Legacy Interrupt Trigger 1280 * Control register and poll till Legacy Interrupt Pointer register 1281 * bit30 is 0. 1282 */ 1283 writel(0, &ha->qla4_83xx_reg->leg_int_trig); 1284 do { 1285 leg_int_ptr = readl(&ha->qla4_83xx_reg->leg_int_ptr); 1286 if ((leg_int_ptr & PF_BITS_MASK) != ha->pf_bit) 1287 break; 1288 } while (leg_int_ptr & LEG_INT_PTR_B30); 1289 1290 spin_lock_irqsave(&ha->hardware_lock, flags); 1291 leg_int_ptr = readl(&ha->qla4_83xx_reg->risc_intr); 1292 ha->isp_ops->interrupt_service_routine(ha, leg_int_ptr); 1293 spin_unlock_irqrestore(&ha->hardware_lock, flags); 1294 1295 return IRQ_HANDLED; 1296 } 1297 1298 irqreturn_t 1299 qla4_8xxx_msi_handler(int irq, void *dev_id) 1300 { 1301 struct scsi_qla_host *ha; 1302 1303 ha = (struct scsi_qla_host *) dev_id; 1304 if (!ha) { 1305 DEBUG2(printk(KERN_INFO 1306 "qla4xxx: MSIX: Interrupt with NULL host ptr\n")); 1307 return IRQ_NONE; 1308 } 1309 1310 ha->isr_count++; 1311 /* clear the interrupt */ 1312 qla4_82xx_wr_32(ha, ha->nx_legacy_intr.tgt_status_reg, 0xffffffff); 1313 1314 /* read twice to ensure write is flushed */ 1315 qla4_82xx_rd_32(ha, ISR_INT_VECTOR); 1316 qla4_82xx_rd_32(ha, ISR_INT_VECTOR); 1317 1318 return qla4_8xxx_default_intr_handler(irq, dev_id); 1319 } 1320 1321 static irqreturn_t qla4_83xx_mailbox_intr_handler(int irq, void *dev_id) 1322 { 1323 struct scsi_qla_host *ha = dev_id; 1324 unsigned long flags; 1325 uint32_t ival = 0; 1326 1327 spin_lock_irqsave(&ha->hardware_lock, flags); 1328 1329 ival = readl(&ha->qla4_83xx_reg->risc_intr); 1330 if (ival == 0) { 1331 ql4_printk(KERN_INFO, ha, 1332 "%s: It is a spurious mailbox interrupt!\n", 1333 __func__); 1334 ival = readl(&ha->qla4_83xx_reg->mb_int_mask); 1335 ival &= ~INT_MASK_FW_MB; 1336 writel(ival, &ha->qla4_83xx_reg->mb_int_mask); 1337 goto exit; 1338 } 1339 1340 qla4xxx_isr_decode_mailbox(ha, 1341 readl(&ha->qla4_83xx_reg->mailbox_out[0])); 1342 writel(0, &ha->qla4_83xx_reg->risc_intr); 1343 ival = readl(&ha->qla4_83xx_reg->mb_int_mask); 1344 ival &= ~INT_MASK_FW_MB; 1345 writel(ival, &ha->qla4_83xx_reg->mb_int_mask); 1346 ha->isr_count++; 1347 exit: 1348 spin_unlock_irqrestore(&ha->hardware_lock, flags); 1349 return IRQ_HANDLED; 1350 } 1351 1352 /** 1353 * qla4_8xxx_default_intr_handler - hardware interrupt handler. 1354 * @irq: Unused 1355 * @dev_id: Pointer to host adapter structure 1356 * 1357 * This interrupt handler is called directly for MSI-X, and 1358 * called indirectly for MSI. 1359 **/ 1360 irqreturn_t 1361 qla4_8xxx_default_intr_handler(int irq, void *dev_id) 1362 { 1363 struct scsi_qla_host *ha = dev_id; 1364 unsigned long flags; 1365 uint32_t intr_status; 1366 uint8_t reqs_count = 0; 1367 1368 if (is_qla8032(ha) || is_qla8042(ha)) { 1369 qla4_83xx_mailbox_intr_handler(irq, dev_id); 1370 } else { 1371 spin_lock_irqsave(&ha->hardware_lock, flags); 1372 while (1) { 1373 if (!(readl(&ha->qla4_82xx_reg->host_int) & 1374 ISRX_82XX_RISC_INT)) { 1375 qla4_82xx_spurious_interrupt(ha, reqs_count); 1376 break; 1377 } 1378 1379 intr_status = readl(&ha->qla4_82xx_reg->host_status); 1380 if ((intr_status & 1381 (HSRX_RISC_MB_INT | HSRX_RISC_IOCB_INT)) == 0) { 1382 qla4_82xx_spurious_interrupt(ha, reqs_count); 1383 break; 1384 } 1385 1386 ha->isp_ops->interrupt_service_routine(ha, intr_status); 1387 1388 if (++reqs_count == MAX_REQS_SERVICED_PER_INTR) 1389 break; 1390 } 1391 ha->isr_count++; 1392 spin_unlock_irqrestore(&ha->hardware_lock, flags); 1393 } 1394 return IRQ_HANDLED; 1395 } 1396 1397 irqreturn_t 1398 qla4_8xxx_msix_rsp_q(int irq, void *dev_id) 1399 { 1400 struct scsi_qla_host *ha = dev_id; 1401 unsigned long flags; 1402 uint32_t ival = 0; 1403 1404 spin_lock_irqsave(&ha->hardware_lock, flags); 1405 if (is_qla8032(ha) || is_qla8042(ha)) { 1406 ival = readl(&ha->qla4_83xx_reg->iocb_int_mask); 1407 if (ival == 0) { 1408 ql4_printk(KERN_INFO, ha, "%s: It is a spurious iocb interrupt!\n", 1409 __func__); 1410 goto exit_msix_rsp_q; 1411 } 1412 qla4xxx_process_response_queue(ha); 1413 writel(0, &ha->qla4_83xx_reg->iocb_int_mask); 1414 } else { 1415 qla4xxx_process_response_queue(ha); 1416 writel(0, &ha->qla4_82xx_reg->host_int); 1417 } 1418 ha->isr_count++; 1419 exit_msix_rsp_q: 1420 spin_unlock_irqrestore(&ha->hardware_lock, flags); 1421 return IRQ_HANDLED; 1422 } 1423 1424 /** 1425 * qla4xxx_process_aen - processes AENs generated by firmware 1426 * @ha: pointer to host adapter structure. 1427 * @process_aen: type of AENs to process 1428 * 1429 * Processes specific types of Asynchronous Events generated by firmware. 1430 * The type of AENs to process is specified by process_aen and can be 1431 * PROCESS_ALL_AENS 0 1432 * FLUSH_DDB_CHANGED_AENS 1 1433 * RELOGIN_DDB_CHANGED_AENS 2 1434 **/ 1435 void qla4xxx_process_aen(struct scsi_qla_host * ha, uint8_t process_aen) 1436 { 1437 uint32_t mbox_sts[MBOX_AEN_REG_COUNT]; 1438 struct aen *aen; 1439 int i; 1440 unsigned long flags; 1441 1442 spin_lock_irqsave(&ha->hardware_lock, flags); 1443 while (ha->aen_out != ha->aen_in) { 1444 aen = &ha->aen_q[ha->aen_out]; 1445 /* copy aen information to local structure */ 1446 for (i = 0; i < MBOX_AEN_REG_COUNT; i++) 1447 mbox_sts[i] = aen->mbox_sts[i]; 1448 1449 ha->aen_q_count++; 1450 ha->aen_out++; 1451 1452 if (ha->aen_out == MAX_AEN_ENTRIES) 1453 ha->aen_out = 0; 1454 1455 spin_unlock_irqrestore(&ha->hardware_lock, flags); 1456 1457 DEBUG2(printk("qla4xxx(%ld): AEN[%d]=0x%08x, mbx1=0x%08x mbx2=0x%08x" 1458 " mbx3=0x%08x mbx4=0x%08x\n", ha->host_no, 1459 (ha->aen_out ? (ha->aen_out-1): (MAX_AEN_ENTRIES-1)), 1460 mbox_sts[0], mbox_sts[1], mbox_sts[2], 1461 mbox_sts[3], mbox_sts[4])); 1462 1463 switch (mbox_sts[0]) { 1464 case MBOX_ASTS_DATABASE_CHANGED: 1465 switch (process_aen) { 1466 case FLUSH_DDB_CHANGED_AENS: 1467 DEBUG2(printk("scsi%ld: AEN[%d] %04x, index " 1468 "[%d] state=%04x FLUSHED!\n", 1469 ha->host_no, ha->aen_out, 1470 mbox_sts[0], mbox_sts[2], 1471 mbox_sts[3])); 1472 break; 1473 case PROCESS_ALL_AENS: 1474 default: 1475 /* Specific device. */ 1476 if (mbox_sts[1] == 1) 1477 qla4xxx_process_ddb_changed(ha, 1478 mbox_sts[2], mbox_sts[3], 1479 mbox_sts[4]); 1480 break; 1481 } 1482 } 1483 spin_lock_irqsave(&ha->hardware_lock, flags); 1484 } 1485 spin_unlock_irqrestore(&ha->hardware_lock, flags); 1486 } 1487 1488 int qla4xxx_request_irqs(struct scsi_qla_host *ha) 1489 { 1490 int ret; 1491 1492 if (is_qla40XX(ha)) 1493 goto try_intx; 1494 1495 if (ql4xenablemsix == 2) { 1496 /* Note: MSI Interrupts not supported for ISP8324 and ISP8042 */ 1497 if (is_qla8032(ha) || is_qla8042(ha)) { 1498 ql4_printk(KERN_INFO, ha, "%s: MSI Interrupts not supported for ISP%04x, Falling back-to INTx mode\n", 1499 __func__, ha->pdev->device); 1500 goto try_intx; 1501 } 1502 goto try_msi; 1503 } 1504 1505 if (ql4xenablemsix == 0 || ql4xenablemsix != 1) 1506 goto try_intx; 1507 1508 /* Trying MSI-X */ 1509 ret = qla4_8xxx_enable_msix(ha); 1510 if (!ret) { 1511 DEBUG2(ql4_printk(KERN_INFO, ha, 1512 "MSI-X: Enabled (0x%X).\n", ha->revision_id)); 1513 goto irq_attached; 1514 } else { 1515 if (is_qla8032(ha) || is_qla8042(ha)) { 1516 ql4_printk(KERN_INFO, ha, "%s: ISP%04x: MSI-X: Falling back-to INTx mode. ret = %d\n", 1517 __func__, ha->pdev->device, ret); 1518 goto try_intx; 1519 } 1520 } 1521 1522 ql4_printk(KERN_WARNING, ha, 1523 "MSI-X: Falling back-to MSI mode -- %d.\n", ret); 1524 1525 try_msi: 1526 /* Trying MSI */ 1527 ret = pci_enable_msi(ha->pdev); 1528 if (!ret) { 1529 ret = request_irq(ha->pdev->irq, qla4_8xxx_msi_handler, 1530 0, DRIVER_NAME, ha); 1531 if (!ret) { 1532 DEBUG2(ql4_printk(KERN_INFO, ha, "MSI: Enabled.\n")); 1533 set_bit(AF_MSI_ENABLED, &ha->flags); 1534 goto irq_attached; 1535 } else { 1536 ql4_printk(KERN_WARNING, ha, 1537 "MSI: Failed to reserve interrupt %d " 1538 "already in use.\n", ha->pdev->irq); 1539 pci_disable_msi(ha->pdev); 1540 } 1541 } 1542 1543 /* 1544 * Prevent interrupts from falling back to INTx mode in cases where 1545 * interrupts cannot get acquired through MSI-X or MSI mode. 1546 */ 1547 if (is_qla8022(ha)) { 1548 ql4_printk(KERN_WARNING, ha, "IRQ not attached -- %d.\n", ret); 1549 goto irq_not_attached; 1550 } 1551 try_intx: 1552 /* Trying INTx */ 1553 ret = request_irq(ha->pdev->irq, ha->isp_ops->intr_handler, 1554 IRQF_SHARED, DRIVER_NAME, ha); 1555 if (!ret) { 1556 DEBUG2(ql4_printk(KERN_INFO, ha, "INTx: Enabled.\n")); 1557 set_bit(AF_INTx_ENABLED, &ha->flags); 1558 goto irq_attached; 1559 1560 } else { 1561 ql4_printk(KERN_WARNING, ha, 1562 "INTx: Failed to reserve interrupt %d already in" 1563 " use.\n", ha->pdev->irq); 1564 goto irq_not_attached; 1565 } 1566 1567 irq_attached: 1568 set_bit(AF_IRQ_ATTACHED, &ha->flags); 1569 ha->host->irq = ha->pdev->irq; 1570 ql4_printk(KERN_INFO, ha, "%s: irq %d attached\n", 1571 __func__, ha->pdev->irq); 1572 irq_not_attached: 1573 return ret; 1574 } 1575 1576 void qla4xxx_free_irqs(struct scsi_qla_host *ha) 1577 { 1578 if (test_and_clear_bit(AF_IRQ_ATTACHED, &ha->flags)) { 1579 if (test_bit(AF_MSIX_ENABLED, &ha->flags)) { 1580 qla4_8xxx_disable_msix(ha); 1581 } else if (test_and_clear_bit(AF_MSI_ENABLED, &ha->flags)) { 1582 free_irq(ha->pdev->irq, ha); 1583 pci_disable_msi(ha->pdev); 1584 } else if (test_and_clear_bit(AF_INTx_ENABLED, &ha->flags)) { 1585 free_irq(ha->pdev->irq, ha); 1586 } 1587 } 1588 } 1589