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:%llu: %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:%llu: %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:%llu: %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:%llu: %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:%llu: %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:%llu: 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:%llu: %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:%llu: %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:%llu: %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:%llu: 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:%llu: %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->back_lock); 389 task = iscsi_itt_to_task(conn, itt); 390 spin_unlock(&conn->session->back_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 static void qla4xxx_default_router_changed(struct scsi_qla_host *ha, 639 uint32_t *mbox_sts) 640 { 641 memcpy(&ha->ip_config.ipv6_default_router_addr.s6_addr32[0], 642 &mbox_sts[2], sizeof(uint32_t)); 643 memcpy(&ha->ip_config.ipv6_default_router_addr.s6_addr32[1], 644 &mbox_sts[3], sizeof(uint32_t)); 645 memcpy(&ha->ip_config.ipv6_default_router_addr.s6_addr32[2], 646 &mbox_sts[4], sizeof(uint32_t)); 647 memcpy(&ha->ip_config.ipv6_default_router_addr.s6_addr32[3], 648 &mbox_sts[5], sizeof(uint32_t)); 649 } 650 651 /** 652 * qla4xxx_isr_decode_mailbox - decodes mailbox status 653 * @ha: Pointer to host adapter structure. 654 * @mailbox_status: Mailbox status. 655 * 656 * This routine decodes the mailbox status during the ISR. 657 * Hardware_lock locked upon entry. runs in interrupt context. 658 **/ 659 static void qla4xxx_isr_decode_mailbox(struct scsi_qla_host * ha, 660 uint32_t mbox_status) 661 { 662 int i; 663 uint32_t mbox_sts[MBOX_AEN_REG_COUNT]; 664 __le32 __iomem *mailbox_out; 665 uint32_t opcode = 0; 666 667 if (is_qla8032(ha) || is_qla8042(ha)) 668 mailbox_out = &ha->qla4_83xx_reg->mailbox_out[0]; 669 else if (is_qla8022(ha)) 670 mailbox_out = &ha->qla4_82xx_reg->mailbox_out[0]; 671 else 672 mailbox_out = &ha->reg->mailbox[0]; 673 674 if ((mbox_status == MBOX_STS_BUSY) || 675 (mbox_status == MBOX_STS_INTERMEDIATE_COMPLETION) || 676 (mbox_status >> 12 == MBOX_COMPLETION_STATUS)) { 677 ha->mbox_status[0] = mbox_status; 678 679 if (test_bit(AF_MBOX_COMMAND, &ha->flags)) { 680 /* 681 * Copy all mailbox registers to a temporary 682 * location and set mailbox command done flag 683 */ 684 for (i = 0; i < ha->mbox_status_count; i++) 685 ha->mbox_status[i] = readl(&mailbox_out[i]); 686 687 set_bit(AF_MBOX_COMMAND_DONE, &ha->flags); 688 689 if (test_bit(AF_MBOX_COMMAND_NOPOLL, &ha->flags)) 690 complete(&ha->mbx_intr_comp); 691 } 692 } else if (mbox_status >> 12 == MBOX_ASYNC_EVENT_STATUS) { 693 for (i = 0; i < MBOX_AEN_REG_COUNT; i++) 694 mbox_sts[i] = readl(&mailbox_out[i]); 695 696 /* Immediately process the AENs that don't require much work. 697 * Only queue the database_changed AENs */ 698 if (ha->aen_log.count < MAX_AEN_ENTRIES) { 699 for (i = 0; i < MBOX_AEN_REG_COUNT; i++) 700 ha->aen_log.entry[ha->aen_log.count].mbox_sts[i] = 701 mbox_sts[i]; 702 ha->aen_log.count++; 703 } 704 switch (mbox_status) { 705 case MBOX_ASTS_SYSTEM_ERROR: 706 /* Log Mailbox registers */ 707 ql4_printk(KERN_INFO, ha, "%s: System Err\n", __func__); 708 qla4xxx_dump_registers(ha); 709 710 if ((is_qla8022(ha) && ql4xdontresethba) || 711 ((is_qla8032(ha) || is_qla8042(ha)) && 712 qla4_83xx_idc_dontreset(ha))) { 713 DEBUG2(printk("scsi%ld: %s:Don't Reset HBA\n", 714 ha->host_no, __func__)); 715 } else { 716 set_bit(AF_GET_CRASH_RECORD, &ha->flags); 717 set_bit(DPC_RESET_HA, &ha->dpc_flags); 718 } 719 break; 720 721 case MBOX_ASTS_REQUEST_TRANSFER_ERROR: 722 case MBOX_ASTS_RESPONSE_TRANSFER_ERROR: 723 case MBOX_ASTS_NVRAM_INVALID: 724 case MBOX_ASTS_IP_ADDRESS_CHANGED: 725 case MBOX_ASTS_DHCP_LEASE_EXPIRED: 726 DEBUG2(printk("scsi%ld: AEN %04x, ERROR Status, " 727 "Reset HA\n", ha->host_no, mbox_status)); 728 if (is_qla80XX(ha)) 729 set_bit(DPC_RESET_HA_FW_CONTEXT, 730 &ha->dpc_flags); 731 else 732 set_bit(DPC_RESET_HA, &ha->dpc_flags); 733 break; 734 735 case MBOX_ASTS_LINK_UP: 736 set_bit(AF_LINK_UP, &ha->flags); 737 if (test_bit(AF_INIT_DONE, &ha->flags)) 738 set_bit(DPC_LINK_CHANGED, &ha->dpc_flags); 739 740 ql4_printk(KERN_INFO, ha, "%s: LINK UP\n", __func__); 741 qla4xxx_post_aen_work(ha, ISCSI_EVENT_LINKUP, 742 sizeof(mbox_sts), 743 (uint8_t *) mbox_sts); 744 745 if ((is_qla8032(ha) || is_qla8042(ha)) && 746 ha->notify_link_up_comp) 747 complete(&ha->link_up_comp); 748 749 break; 750 751 case MBOX_ASTS_LINK_DOWN: 752 clear_bit(AF_LINK_UP, &ha->flags); 753 if (test_bit(AF_INIT_DONE, &ha->flags)) { 754 set_bit(DPC_LINK_CHANGED, &ha->dpc_flags); 755 qla4xxx_wake_dpc(ha); 756 } 757 758 ql4_printk(KERN_INFO, ha, "%s: LINK DOWN\n", __func__); 759 qla4xxx_post_aen_work(ha, ISCSI_EVENT_LINKDOWN, 760 sizeof(mbox_sts), 761 (uint8_t *) mbox_sts); 762 break; 763 764 case MBOX_ASTS_HEARTBEAT: 765 ha->seconds_since_last_heartbeat = 0; 766 break; 767 768 case MBOX_ASTS_DHCP_LEASE_ACQUIRED: 769 DEBUG2(printk("scsi%ld: AEN %04x DHCP LEASE " 770 "ACQUIRED\n", ha->host_no, mbox_status)); 771 set_bit(DPC_GET_DHCP_IP_ADDR, &ha->dpc_flags); 772 break; 773 774 case MBOX_ASTS_PROTOCOL_STATISTIC_ALARM: 775 case MBOX_ASTS_SCSI_COMMAND_PDU_REJECTED: /* Target 776 * mode 777 * only */ 778 case MBOX_ASTS_UNSOLICITED_PDU_RECEIVED: /* Connection mode */ 779 case MBOX_ASTS_IPSEC_SYSTEM_FATAL_ERROR: 780 case MBOX_ASTS_SUBNET_STATE_CHANGE: 781 case MBOX_ASTS_DUPLICATE_IP: 782 /* No action */ 783 DEBUG2(printk("scsi%ld: AEN %04x\n", ha->host_no, 784 mbox_status)); 785 break; 786 787 case MBOX_ASTS_IP_ADDR_STATE_CHANGED: 788 printk("scsi%ld: AEN %04x, mbox_sts[2]=%04x, " 789 "mbox_sts[3]=%04x\n", ha->host_no, mbox_sts[0], 790 mbox_sts[2], mbox_sts[3]); 791 792 qla4xxx_update_ipaddr_state(ha, mbox_sts[5], 793 mbox_sts[3]); 794 /* mbox_sts[2] = Old ACB state 795 * mbox_sts[3] = new ACB state */ 796 if ((mbox_sts[3] == IP_ADDRSTATE_PREFERRED) && 797 ((mbox_sts[2] == IP_ADDRSTATE_TENTATIVE) || 798 (mbox_sts[2] == IP_ADDRSTATE_ACQUIRING))) { 799 set_bit(DPC_GET_DHCP_IP_ADDR, &ha->dpc_flags); 800 } else if ((mbox_sts[3] == IP_ADDRSTATE_ACQUIRING) && 801 (mbox_sts[2] == IP_ADDRSTATE_PREFERRED)) { 802 if (is_qla80XX(ha)) 803 set_bit(DPC_RESET_HA_FW_CONTEXT, 804 &ha->dpc_flags); 805 else 806 set_bit(DPC_RESET_HA, &ha->dpc_flags); 807 } else if (mbox_sts[3] == IP_ADDRSTATE_DISABLING) { 808 ql4_printk(KERN_INFO, ha, "scsi%ld: %s: ACB in disabling state\n", 809 ha->host_no, __func__); 810 } else if (mbox_sts[3] == IP_ADDRSTATE_UNCONFIGURED) { 811 complete(&ha->disable_acb_comp); 812 ql4_printk(KERN_INFO, ha, "scsi%ld: %s: ACB state unconfigured\n", 813 ha->host_no, __func__); 814 } 815 break; 816 817 case MBOX_ASTS_IPV6_LINK_MTU_CHANGE: 818 case MBOX_ASTS_IPV6_AUTO_PREFIX_IGNORED: 819 case MBOX_ASTS_IPV6_ND_LOCAL_PREFIX_IGNORED: 820 /* No action */ 821 DEBUG2(ql4_printk(KERN_INFO, ha, "scsi%ld: AEN %04x\n", 822 ha->host_no, mbox_status)); 823 break; 824 825 case MBOX_ASTS_ICMPV6_ERROR_MSG_RCVD: 826 DEBUG2(ql4_printk(KERN_INFO, ha, 827 "scsi%ld: AEN %04x, IPv6 ERROR, " 828 "mbox_sts[1]=%08x, mbox_sts[2]=%08x, mbox_sts[3}=%08x, mbox_sts[4]=%08x mbox_sts[5]=%08x\n", 829 ha->host_no, mbox_sts[0], mbox_sts[1], 830 mbox_sts[2], mbox_sts[3], mbox_sts[4], 831 mbox_sts[5])); 832 break; 833 834 case MBOX_ASTS_MAC_ADDRESS_CHANGED: 835 case MBOX_ASTS_DNS: 836 /* No action */ 837 DEBUG2(printk(KERN_INFO "scsi%ld: AEN %04x, " 838 "mbox_sts[1]=%04x, mbox_sts[2]=%04x\n", 839 ha->host_no, mbox_sts[0], 840 mbox_sts[1], mbox_sts[2])); 841 break; 842 843 case MBOX_ASTS_SELF_TEST_FAILED: 844 case MBOX_ASTS_LOGIN_FAILED: 845 /* No action */ 846 DEBUG2(printk("scsi%ld: AEN %04x, mbox_sts[1]=%04x, " 847 "mbox_sts[2]=%04x, mbox_sts[3]=%04x\n", 848 ha->host_no, mbox_sts[0], mbox_sts[1], 849 mbox_sts[2], mbox_sts[3])); 850 break; 851 852 case MBOX_ASTS_DATABASE_CHANGED: 853 /* Queue AEN information and process it in the DPC 854 * routine */ 855 if (ha->aen_q_count > 0) { 856 857 /* decrement available counter */ 858 ha->aen_q_count--; 859 860 for (i = 0; i < MBOX_AEN_REG_COUNT; i++) 861 ha->aen_q[ha->aen_in].mbox_sts[i] = 862 mbox_sts[i]; 863 864 /* print debug message */ 865 DEBUG2(printk("scsi%ld: AEN[%d] %04x queued " 866 "mb1:0x%x mb2:0x%x mb3:0x%x " 867 "mb4:0x%x mb5:0x%x\n", 868 ha->host_no, ha->aen_in, 869 mbox_sts[0], mbox_sts[1], 870 mbox_sts[2], mbox_sts[3], 871 mbox_sts[4], mbox_sts[5])); 872 873 /* advance pointer */ 874 ha->aen_in++; 875 if (ha->aen_in == MAX_AEN_ENTRIES) 876 ha->aen_in = 0; 877 878 /* The DPC routine will process the aen */ 879 set_bit(DPC_AEN, &ha->dpc_flags); 880 } else { 881 DEBUG2(printk("scsi%ld: %s: aen %04x, queue " 882 "overflowed! AEN LOST!!\n", 883 ha->host_no, __func__, 884 mbox_sts[0])); 885 886 DEBUG2(printk("scsi%ld: DUMP AEN QUEUE\n", 887 ha->host_no)); 888 889 for (i = 0; i < MAX_AEN_ENTRIES; i++) { 890 DEBUG2(printk("AEN[%d] %04x %04x %04x " 891 "%04x\n", i, mbox_sts[0], 892 mbox_sts[1], mbox_sts[2], 893 mbox_sts[3])); 894 } 895 } 896 break; 897 898 case MBOX_ASTS_TXSCVR_INSERTED: 899 DEBUG2(printk(KERN_WARNING 900 "scsi%ld: AEN %04x Transceiver" 901 " inserted\n", ha->host_no, mbox_sts[0])); 902 break; 903 904 case MBOX_ASTS_TXSCVR_REMOVED: 905 DEBUG2(printk(KERN_WARNING 906 "scsi%ld: AEN %04x Transceiver" 907 " removed\n", ha->host_no, mbox_sts[0])); 908 break; 909 910 case MBOX_ASTS_IDC_REQUEST_NOTIFICATION: 911 if (is_qla8032(ha) || is_qla8042(ha)) { 912 DEBUG2(ql4_printk(KERN_INFO, ha, 913 "scsi%ld: AEN %04x, mbox_sts[1]=%08x, mbox_sts[2]=%08x, mbox_sts[3]=%08x, mbox_sts[4]=%08x\n", 914 ha->host_no, mbox_sts[0], 915 mbox_sts[1], mbox_sts[2], 916 mbox_sts[3], mbox_sts[4])); 917 opcode = mbox_sts[1] >> 16; 918 if ((opcode == MBOX_CMD_SET_PORT_CONFIG) || 919 (opcode == MBOX_CMD_PORT_RESET)) { 920 set_bit(DPC_POST_IDC_ACK, 921 &ha->dpc_flags); 922 ha->idc_info.request_desc = mbox_sts[1]; 923 ha->idc_info.info1 = mbox_sts[2]; 924 ha->idc_info.info2 = mbox_sts[3]; 925 ha->idc_info.info3 = mbox_sts[4]; 926 qla4xxx_wake_dpc(ha); 927 } 928 } 929 break; 930 931 case MBOX_ASTS_IDC_COMPLETE: 932 if (is_qla8032(ha) || is_qla8042(ha)) { 933 DEBUG2(ql4_printk(KERN_INFO, ha, 934 "scsi%ld: AEN %04x, mbox_sts[1]=%08x, mbox_sts[2]=%08x, mbox_sts[3]=%08x, mbox_sts[4]=%08x\n", 935 ha->host_no, mbox_sts[0], 936 mbox_sts[1], mbox_sts[2], 937 mbox_sts[3], mbox_sts[4])); 938 DEBUG2(ql4_printk(KERN_INFO, ha, 939 "scsi:%ld: AEN %04x IDC Complete notification\n", 940 ha->host_no, mbox_sts[0])); 941 942 opcode = mbox_sts[1] >> 16; 943 if (ha->notify_idc_comp) 944 complete(&ha->idc_comp); 945 946 if ((opcode == MBOX_CMD_SET_PORT_CONFIG) || 947 (opcode == MBOX_CMD_PORT_RESET)) 948 ha->idc_info.info2 = mbox_sts[3]; 949 950 if (qla4_83xx_loopback_in_progress(ha)) { 951 set_bit(AF_LOOPBACK, &ha->flags); 952 } else { 953 clear_bit(AF_LOOPBACK, &ha->flags); 954 if (ha->saved_acb) 955 set_bit(DPC_RESTORE_ACB, 956 &ha->dpc_flags); 957 } 958 qla4xxx_wake_dpc(ha); 959 } 960 break; 961 962 case MBOX_ASTS_IPV6_DEFAULT_ROUTER_CHANGED: 963 DEBUG2(ql4_printk(KERN_INFO, ha, 964 "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", 965 ha->host_no, mbox_sts[0], mbox_sts[1], 966 mbox_sts[2], mbox_sts[3], mbox_sts[4], 967 mbox_sts[5])); 968 DEBUG2(ql4_printk(KERN_INFO, ha, 969 "scsi%ld: AEN %04x Received IPv6 default router changed notification\n", 970 ha->host_no, mbox_sts[0])); 971 qla4xxx_default_router_changed(ha, mbox_sts); 972 break; 973 974 case MBOX_ASTS_IDC_TIME_EXTEND_NOTIFICATION: 975 DEBUG2(ql4_printk(KERN_INFO, ha, 976 "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", 977 ha->host_no, mbox_sts[0], mbox_sts[1], 978 mbox_sts[2], mbox_sts[3], mbox_sts[4], 979 mbox_sts[5])); 980 DEBUG2(ql4_printk(KERN_INFO, ha, 981 "scsi%ld: AEN %04x Received IDC Extend Timeout notification\n", 982 ha->host_no, mbox_sts[0])); 983 /* new IDC timeout */ 984 ha->idc_extend_tmo = mbox_sts[1]; 985 break; 986 987 case MBOX_ASTS_INITIALIZATION_FAILED: 988 DEBUG2(ql4_printk(KERN_INFO, ha, 989 "scsi%ld: AEN %04x, mbox_sts[3]=%08x\n", 990 ha->host_no, mbox_sts[0], 991 mbox_sts[3])); 992 break; 993 994 case MBOX_ASTS_SYSTEM_WARNING_EVENT: 995 DEBUG2(ql4_printk(KERN_WARNING, ha, 996 "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", 997 ha->host_no, mbox_sts[0], mbox_sts[1], 998 mbox_sts[2], mbox_sts[3], mbox_sts[4], 999 mbox_sts[5])); 1000 break; 1001 1002 case MBOX_ASTS_DCBX_CONF_CHANGE: 1003 DEBUG2(ql4_printk(KERN_INFO, ha, 1004 "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", 1005 ha->host_no, mbox_sts[0], mbox_sts[1], 1006 mbox_sts[2], mbox_sts[3], mbox_sts[4], 1007 mbox_sts[5])); 1008 DEBUG2(ql4_printk(KERN_INFO, ha, 1009 "scsi%ld: AEN %04x Received DCBX configuration changed notification\n", 1010 ha->host_no, mbox_sts[0])); 1011 break; 1012 1013 default: 1014 DEBUG2(printk(KERN_WARNING 1015 "scsi%ld: AEN %04x UNKNOWN\n", 1016 ha->host_no, mbox_sts[0])); 1017 break; 1018 } 1019 } else { 1020 DEBUG2(printk("scsi%ld: Unknown mailbox status %08X\n", 1021 ha->host_no, mbox_status)); 1022 1023 ha->mbox_status[0] = mbox_status; 1024 } 1025 } 1026 1027 void qla4_83xx_interrupt_service_routine(struct scsi_qla_host *ha, 1028 uint32_t intr_status) 1029 { 1030 /* Process mailbox/asynch event interrupt.*/ 1031 if (intr_status) { 1032 qla4xxx_isr_decode_mailbox(ha, 1033 readl(&ha->qla4_83xx_reg->mailbox_out[0])); 1034 /* clear the interrupt */ 1035 writel(0, &ha->qla4_83xx_reg->risc_intr); 1036 } else { 1037 qla4xxx_process_response_queue(ha); 1038 } 1039 1040 /* clear the interrupt */ 1041 writel(0, &ha->qla4_83xx_reg->mb_int_mask); 1042 } 1043 1044 /** 1045 * qla4_82xx_interrupt_service_routine - isr 1046 * @ha: pointer to host adapter structure. 1047 * 1048 * This is the main interrupt service routine. 1049 * hardware_lock locked upon entry. runs in interrupt context. 1050 **/ 1051 void qla4_82xx_interrupt_service_routine(struct scsi_qla_host *ha, 1052 uint32_t intr_status) 1053 { 1054 /* Process response queue interrupt. */ 1055 if ((intr_status & HSRX_RISC_IOCB_INT) && 1056 test_bit(AF_INIT_DONE, &ha->flags)) 1057 qla4xxx_process_response_queue(ha); 1058 1059 /* Process mailbox/asynch event interrupt.*/ 1060 if (intr_status & HSRX_RISC_MB_INT) 1061 qla4xxx_isr_decode_mailbox(ha, 1062 readl(&ha->qla4_82xx_reg->mailbox_out[0])); 1063 1064 /* clear the interrupt */ 1065 writel(0, &ha->qla4_82xx_reg->host_int); 1066 readl(&ha->qla4_82xx_reg->host_int); 1067 } 1068 1069 /** 1070 * qla4xxx_interrupt_service_routine - isr 1071 * @ha: pointer to host adapter structure. 1072 * 1073 * This is the main interrupt service routine. 1074 * hardware_lock locked upon entry. runs in interrupt context. 1075 **/ 1076 void qla4xxx_interrupt_service_routine(struct scsi_qla_host * ha, 1077 uint32_t intr_status) 1078 { 1079 /* Process response queue interrupt. */ 1080 if (intr_status & CSR_SCSI_COMPLETION_INTR) 1081 qla4xxx_process_response_queue(ha); 1082 1083 /* Process mailbox/asynch event interrupt.*/ 1084 if (intr_status & CSR_SCSI_PROCESSOR_INTR) { 1085 qla4xxx_isr_decode_mailbox(ha, 1086 readl(&ha->reg->mailbox[0])); 1087 1088 /* Clear Mailbox Interrupt */ 1089 writel(set_rmask(CSR_SCSI_PROCESSOR_INTR), 1090 &ha->reg->ctrl_status); 1091 readl(&ha->reg->ctrl_status); 1092 } 1093 } 1094 1095 /** 1096 * qla4_82xx_spurious_interrupt - processes spurious interrupt 1097 * @ha: pointer to host adapter structure. 1098 * @reqs_count: . 1099 * 1100 **/ 1101 static void qla4_82xx_spurious_interrupt(struct scsi_qla_host *ha, 1102 uint8_t reqs_count) 1103 { 1104 if (reqs_count) 1105 return; 1106 1107 DEBUG2(ql4_printk(KERN_INFO, ha, "Spurious Interrupt\n")); 1108 if (is_qla8022(ha)) { 1109 writel(0, &ha->qla4_82xx_reg->host_int); 1110 if (test_bit(AF_INTx_ENABLED, &ha->flags)) 1111 qla4_82xx_wr_32(ha, ha->nx_legacy_intr.tgt_mask_reg, 1112 0xfbff); 1113 } 1114 ha->spurious_int_count++; 1115 } 1116 1117 /** 1118 * qla4xxx_intr_handler - hardware interrupt handler. 1119 * @irq: Unused 1120 * @dev_id: Pointer to host adapter structure 1121 **/ 1122 irqreturn_t qla4xxx_intr_handler(int irq, void *dev_id) 1123 { 1124 struct scsi_qla_host *ha; 1125 uint32_t intr_status; 1126 unsigned long flags = 0; 1127 uint8_t reqs_count = 0; 1128 1129 ha = (struct scsi_qla_host *) dev_id; 1130 if (!ha) { 1131 DEBUG2(printk(KERN_INFO 1132 "qla4xxx: Interrupt with NULL host ptr\n")); 1133 return IRQ_NONE; 1134 } 1135 1136 spin_lock_irqsave(&ha->hardware_lock, flags); 1137 1138 ha->isr_count++; 1139 /* 1140 * Repeatedly service interrupts up to a maximum of 1141 * MAX_REQS_SERVICED_PER_INTR 1142 */ 1143 while (1) { 1144 /* 1145 * Read interrupt status 1146 */ 1147 if (ha->isp_ops->rd_shdw_rsp_q_in(ha) != 1148 ha->response_out) 1149 intr_status = CSR_SCSI_COMPLETION_INTR; 1150 else 1151 intr_status = readl(&ha->reg->ctrl_status); 1152 1153 if ((intr_status & 1154 (CSR_SCSI_RESET_INTR|CSR_FATAL_ERROR|INTR_PENDING)) == 0) { 1155 if (reqs_count == 0) 1156 ha->spurious_int_count++; 1157 break; 1158 } 1159 1160 if (intr_status & CSR_FATAL_ERROR) { 1161 DEBUG2(printk(KERN_INFO "scsi%ld: Fatal Error, " 1162 "Status 0x%04x\n", ha->host_no, 1163 readl(isp_port_error_status (ha)))); 1164 1165 /* Issue Soft Reset to clear this error condition. 1166 * This will prevent the RISC from repeatedly 1167 * interrupting the driver; thus, allowing the DPC to 1168 * get scheduled to continue error recovery. 1169 * NOTE: Disabling RISC interrupts does not work in 1170 * this case, as CSR_FATAL_ERROR overrides 1171 * CSR_SCSI_INTR_ENABLE */ 1172 if ((readl(&ha->reg->ctrl_status) & 1173 CSR_SCSI_RESET_INTR) == 0) { 1174 writel(set_rmask(CSR_SOFT_RESET), 1175 &ha->reg->ctrl_status); 1176 readl(&ha->reg->ctrl_status); 1177 } 1178 1179 writel(set_rmask(CSR_FATAL_ERROR), 1180 &ha->reg->ctrl_status); 1181 readl(&ha->reg->ctrl_status); 1182 1183 __qla4xxx_disable_intrs(ha); 1184 1185 set_bit(DPC_RESET_HA, &ha->dpc_flags); 1186 1187 break; 1188 } else if (intr_status & CSR_SCSI_RESET_INTR) { 1189 clear_bit(AF_ONLINE, &ha->flags); 1190 __qla4xxx_disable_intrs(ha); 1191 1192 writel(set_rmask(CSR_SCSI_RESET_INTR), 1193 &ha->reg->ctrl_status); 1194 readl(&ha->reg->ctrl_status); 1195 1196 if (!test_bit(AF_HA_REMOVAL, &ha->flags)) 1197 set_bit(DPC_RESET_HA_INTR, &ha->dpc_flags); 1198 1199 break; 1200 } else if (intr_status & INTR_PENDING) { 1201 ha->isp_ops->interrupt_service_routine(ha, intr_status); 1202 ha->total_io_count++; 1203 if (++reqs_count == MAX_REQS_SERVICED_PER_INTR) 1204 break; 1205 } 1206 } 1207 1208 spin_unlock_irqrestore(&ha->hardware_lock, flags); 1209 1210 return IRQ_HANDLED; 1211 } 1212 1213 /** 1214 * qla4_82xx_intr_handler - hardware interrupt handler. 1215 * @irq: Unused 1216 * @dev_id: Pointer to host adapter structure 1217 **/ 1218 irqreturn_t qla4_82xx_intr_handler(int irq, void *dev_id) 1219 { 1220 struct scsi_qla_host *ha = dev_id; 1221 uint32_t intr_status; 1222 uint32_t status; 1223 unsigned long flags = 0; 1224 uint8_t reqs_count = 0; 1225 1226 if (unlikely(pci_channel_offline(ha->pdev))) 1227 return IRQ_HANDLED; 1228 1229 ha->isr_count++; 1230 status = qla4_82xx_rd_32(ha, ISR_INT_VECTOR); 1231 if (!(status & ha->nx_legacy_intr.int_vec_bit)) 1232 return IRQ_NONE; 1233 1234 status = qla4_82xx_rd_32(ha, ISR_INT_STATE_REG); 1235 if (!ISR_IS_LEGACY_INTR_TRIGGERED(status)) { 1236 DEBUG7(ql4_printk(KERN_INFO, ha, 1237 "%s legacy Int not triggered\n", __func__)); 1238 return IRQ_NONE; 1239 } 1240 1241 /* clear the interrupt */ 1242 qla4_82xx_wr_32(ha, ha->nx_legacy_intr.tgt_status_reg, 0xffffffff); 1243 1244 /* read twice to ensure write is flushed */ 1245 qla4_82xx_rd_32(ha, ISR_INT_VECTOR); 1246 qla4_82xx_rd_32(ha, ISR_INT_VECTOR); 1247 1248 spin_lock_irqsave(&ha->hardware_lock, flags); 1249 while (1) { 1250 if (!(readl(&ha->qla4_82xx_reg->host_int) & 1251 ISRX_82XX_RISC_INT)) { 1252 qla4_82xx_spurious_interrupt(ha, reqs_count); 1253 break; 1254 } 1255 intr_status = readl(&ha->qla4_82xx_reg->host_status); 1256 if ((intr_status & 1257 (HSRX_RISC_MB_INT | HSRX_RISC_IOCB_INT)) == 0) { 1258 qla4_82xx_spurious_interrupt(ha, reqs_count); 1259 break; 1260 } 1261 1262 ha->isp_ops->interrupt_service_routine(ha, intr_status); 1263 1264 /* Enable Interrupt */ 1265 qla4_82xx_wr_32(ha, ha->nx_legacy_intr.tgt_mask_reg, 0xfbff); 1266 1267 if (++reqs_count == MAX_REQS_SERVICED_PER_INTR) 1268 break; 1269 } 1270 1271 spin_unlock_irqrestore(&ha->hardware_lock, flags); 1272 return IRQ_HANDLED; 1273 } 1274 1275 #define LEG_INT_PTR_B31 (1 << 31) 1276 #define LEG_INT_PTR_B30 (1 << 30) 1277 #define PF_BITS_MASK (0xF << 16) 1278 1279 /** 1280 * qla4_83xx_intr_handler - hardware interrupt handler. 1281 * @irq: Unused 1282 * @dev_id: Pointer to host adapter structure 1283 **/ 1284 irqreturn_t qla4_83xx_intr_handler(int irq, void *dev_id) 1285 { 1286 struct scsi_qla_host *ha = dev_id; 1287 uint32_t leg_int_ptr = 0; 1288 unsigned long flags = 0; 1289 1290 ha->isr_count++; 1291 leg_int_ptr = readl(&ha->qla4_83xx_reg->leg_int_ptr); 1292 1293 /* Legacy interrupt is valid if bit31 of leg_int_ptr is set */ 1294 if (!(leg_int_ptr & LEG_INT_PTR_B31)) { 1295 DEBUG7(ql4_printk(KERN_ERR, ha, 1296 "%s: Legacy Interrupt Bit 31 not set, spurious interrupt!\n", 1297 __func__)); 1298 return IRQ_NONE; 1299 } 1300 1301 /* Validate the PCIE function ID set in leg_int_ptr bits [19..16] */ 1302 if ((leg_int_ptr & PF_BITS_MASK) != ha->pf_bit) { 1303 DEBUG7(ql4_printk(KERN_ERR, ha, 1304 "%s: Incorrect function ID 0x%x in legacy interrupt register, ha->pf_bit = 0x%x\n", 1305 __func__, (leg_int_ptr & PF_BITS_MASK), 1306 ha->pf_bit)); 1307 return IRQ_NONE; 1308 } 1309 1310 /* To de-assert legacy interrupt, write 0 to Legacy Interrupt Trigger 1311 * Control register and poll till Legacy Interrupt Pointer register 1312 * bit30 is 0. 1313 */ 1314 writel(0, &ha->qla4_83xx_reg->leg_int_trig); 1315 do { 1316 leg_int_ptr = readl(&ha->qla4_83xx_reg->leg_int_ptr); 1317 if ((leg_int_ptr & PF_BITS_MASK) != ha->pf_bit) 1318 break; 1319 } while (leg_int_ptr & LEG_INT_PTR_B30); 1320 1321 spin_lock_irqsave(&ha->hardware_lock, flags); 1322 leg_int_ptr = readl(&ha->qla4_83xx_reg->risc_intr); 1323 ha->isp_ops->interrupt_service_routine(ha, leg_int_ptr); 1324 spin_unlock_irqrestore(&ha->hardware_lock, flags); 1325 1326 return IRQ_HANDLED; 1327 } 1328 1329 irqreturn_t 1330 qla4_8xxx_msi_handler(int irq, void *dev_id) 1331 { 1332 struct scsi_qla_host *ha; 1333 1334 ha = (struct scsi_qla_host *) dev_id; 1335 if (!ha) { 1336 DEBUG2(printk(KERN_INFO 1337 "qla4xxx: MSIX: Interrupt with NULL host ptr\n")); 1338 return IRQ_NONE; 1339 } 1340 1341 ha->isr_count++; 1342 /* clear the interrupt */ 1343 qla4_82xx_wr_32(ha, ha->nx_legacy_intr.tgt_status_reg, 0xffffffff); 1344 1345 /* read twice to ensure write is flushed */ 1346 qla4_82xx_rd_32(ha, ISR_INT_VECTOR); 1347 qla4_82xx_rd_32(ha, ISR_INT_VECTOR); 1348 1349 return qla4_8xxx_default_intr_handler(irq, dev_id); 1350 } 1351 1352 static irqreturn_t qla4_83xx_mailbox_intr_handler(int irq, void *dev_id) 1353 { 1354 struct scsi_qla_host *ha = dev_id; 1355 unsigned long flags; 1356 uint32_t ival = 0; 1357 1358 spin_lock_irqsave(&ha->hardware_lock, flags); 1359 1360 ival = readl(&ha->qla4_83xx_reg->risc_intr); 1361 if (ival == 0) { 1362 ql4_printk(KERN_INFO, ha, 1363 "%s: It is a spurious mailbox interrupt!\n", 1364 __func__); 1365 ival = readl(&ha->qla4_83xx_reg->mb_int_mask); 1366 ival &= ~INT_MASK_FW_MB; 1367 writel(ival, &ha->qla4_83xx_reg->mb_int_mask); 1368 goto exit; 1369 } 1370 1371 qla4xxx_isr_decode_mailbox(ha, 1372 readl(&ha->qla4_83xx_reg->mailbox_out[0])); 1373 writel(0, &ha->qla4_83xx_reg->risc_intr); 1374 ival = readl(&ha->qla4_83xx_reg->mb_int_mask); 1375 ival &= ~INT_MASK_FW_MB; 1376 writel(ival, &ha->qla4_83xx_reg->mb_int_mask); 1377 ha->isr_count++; 1378 exit: 1379 spin_unlock_irqrestore(&ha->hardware_lock, flags); 1380 return IRQ_HANDLED; 1381 } 1382 1383 /** 1384 * qla4_8xxx_default_intr_handler - hardware interrupt handler. 1385 * @irq: Unused 1386 * @dev_id: Pointer to host adapter structure 1387 * 1388 * This interrupt handler is called directly for MSI-X, and 1389 * called indirectly for MSI. 1390 **/ 1391 irqreturn_t 1392 qla4_8xxx_default_intr_handler(int irq, void *dev_id) 1393 { 1394 struct scsi_qla_host *ha = dev_id; 1395 unsigned long flags; 1396 uint32_t intr_status; 1397 uint8_t reqs_count = 0; 1398 1399 if (is_qla8032(ha) || is_qla8042(ha)) { 1400 qla4_83xx_mailbox_intr_handler(irq, dev_id); 1401 } else { 1402 spin_lock_irqsave(&ha->hardware_lock, flags); 1403 while (1) { 1404 if (!(readl(&ha->qla4_82xx_reg->host_int) & 1405 ISRX_82XX_RISC_INT)) { 1406 qla4_82xx_spurious_interrupt(ha, reqs_count); 1407 break; 1408 } 1409 1410 intr_status = readl(&ha->qla4_82xx_reg->host_status); 1411 if ((intr_status & 1412 (HSRX_RISC_MB_INT | HSRX_RISC_IOCB_INT)) == 0) { 1413 qla4_82xx_spurious_interrupt(ha, reqs_count); 1414 break; 1415 } 1416 1417 ha->isp_ops->interrupt_service_routine(ha, intr_status); 1418 1419 if (++reqs_count == MAX_REQS_SERVICED_PER_INTR) 1420 break; 1421 } 1422 ha->isr_count++; 1423 spin_unlock_irqrestore(&ha->hardware_lock, flags); 1424 } 1425 return IRQ_HANDLED; 1426 } 1427 1428 irqreturn_t 1429 qla4_8xxx_msix_rsp_q(int irq, void *dev_id) 1430 { 1431 struct scsi_qla_host *ha = dev_id; 1432 unsigned long flags; 1433 int intr_status; 1434 uint32_t ival = 0; 1435 1436 spin_lock_irqsave(&ha->hardware_lock, flags); 1437 if (is_qla8032(ha) || is_qla8042(ha)) { 1438 ival = readl(&ha->qla4_83xx_reg->iocb_int_mask); 1439 if (ival == 0) { 1440 ql4_printk(KERN_INFO, ha, "%s: It is a spurious iocb interrupt!\n", 1441 __func__); 1442 goto exit_msix_rsp_q; 1443 } 1444 qla4xxx_process_response_queue(ha); 1445 writel(0, &ha->qla4_83xx_reg->iocb_int_mask); 1446 } else { 1447 intr_status = readl(&ha->qla4_82xx_reg->host_status); 1448 if (intr_status & HSRX_RISC_IOCB_INT) { 1449 qla4xxx_process_response_queue(ha); 1450 writel(0, &ha->qla4_82xx_reg->host_int); 1451 } else { 1452 ql4_printk(KERN_INFO, ha, "%s: spurious iocb interrupt...\n", 1453 __func__); 1454 goto exit_msix_rsp_q; 1455 } 1456 } 1457 ha->isr_count++; 1458 exit_msix_rsp_q: 1459 spin_unlock_irqrestore(&ha->hardware_lock, flags); 1460 return IRQ_HANDLED; 1461 } 1462 1463 /** 1464 * qla4xxx_process_aen - processes AENs generated by firmware 1465 * @ha: pointer to host adapter structure. 1466 * @process_aen: type of AENs to process 1467 * 1468 * Processes specific types of Asynchronous Events generated by firmware. 1469 * The type of AENs to process is specified by process_aen and can be 1470 * PROCESS_ALL_AENS 0 1471 * FLUSH_DDB_CHANGED_AENS 1 1472 * RELOGIN_DDB_CHANGED_AENS 2 1473 **/ 1474 void qla4xxx_process_aen(struct scsi_qla_host * ha, uint8_t process_aen) 1475 { 1476 uint32_t mbox_sts[MBOX_AEN_REG_COUNT]; 1477 struct aen *aen; 1478 int i; 1479 unsigned long flags; 1480 1481 spin_lock_irqsave(&ha->hardware_lock, flags); 1482 while (ha->aen_out != ha->aen_in) { 1483 aen = &ha->aen_q[ha->aen_out]; 1484 /* copy aen information to local structure */ 1485 for (i = 0; i < MBOX_AEN_REG_COUNT; i++) 1486 mbox_sts[i] = aen->mbox_sts[i]; 1487 1488 ha->aen_q_count++; 1489 ha->aen_out++; 1490 1491 if (ha->aen_out == MAX_AEN_ENTRIES) 1492 ha->aen_out = 0; 1493 1494 spin_unlock_irqrestore(&ha->hardware_lock, flags); 1495 1496 DEBUG2(printk("qla4xxx(%ld): AEN[%d]=0x%08x, mbx1=0x%08x mbx2=0x%08x" 1497 " mbx3=0x%08x mbx4=0x%08x\n", ha->host_no, 1498 (ha->aen_out ? (ha->aen_out-1): (MAX_AEN_ENTRIES-1)), 1499 mbox_sts[0], mbox_sts[1], mbox_sts[2], 1500 mbox_sts[3], mbox_sts[4])); 1501 1502 switch (mbox_sts[0]) { 1503 case MBOX_ASTS_DATABASE_CHANGED: 1504 switch (process_aen) { 1505 case FLUSH_DDB_CHANGED_AENS: 1506 DEBUG2(printk("scsi%ld: AEN[%d] %04x, index " 1507 "[%d] state=%04x FLUSHED!\n", 1508 ha->host_no, ha->aen_out, 1509 mbox_sts[0], mbox_sts[2], 1510 mbox_sts[3])); 1511 break; 1512 case PROCESS_ALL_AENS: 1513 default: 1514 /* Specific device. */ 1515 if (mbox_sts[1] == 1) 1516 qla4xxx_process_ddb_changed(ha, 1517 mbox_sts[2], mbox_sts[3], 1518 mbox_sts[4]); 1519 break; 1520 } 1521 } 1522 spin_lock_irqsave(&ha->hardware_lock, flags); 1523 } 1524 spin_unlock_irqrestore(&ha->hardware_lock, flags); 1525 } 1526 1527 int qla4xxx_request_irqs(struct scsi_qla_host *ha) 1528 { 1529 int ret = 0; 1530 int rval = QLA_ERROR; 1531 1532 if (is_qla40XX(ha)) 1533 goto try_intx; 1534 1535 if (ql4xenablemsix == 2) { 1536 /* Note: MSI Interrupts not supported for ISP8324 and ISP8042 */ 1537 if (is_qla8032(ha) || is_qla8042(ha)) { 1538 ql4_printk(KERN_INFO, ha, "%s: MSI Interrupts not supported for ISP%04x, Falling back-to INTx mode\n", 1539 __func__, ha->pdev->device); 1540 goto try_intx; 1541 } 1542 goto try_msi; 1543 } 1544 1545 if (ql4xenablemsix == 0 || ql4xenablemsix != 1) 1546 goto try_intx; 1547 1548 /* Trying MSI-X */ 1549 ret = qla4_8xxx_enable_msix(ha); 1550 if (!ret) { 1551 DEBUG2(ql4_printk(KERN_INFO, ha, 1552 "MSI-X: Enabled (0x%X).\n", ha->revision_id)); 1553 goto irq_attached; 1554 } else { 1555 if (is_qla8032(ha) || is_qla8042(ha)) { 1556 ql4_printk(KERN_INFO, ha, "%s: ISP%04x: MSI-X: Falling back-to INTx mode. ret = %d\n", 1557 __func__, ha->pdev->device, ret); 1558 goto try_intx; 1559 } 1560 } 1561 1562 ql4_printk(KERN_WARNING, ha, 1563 "MSI-X: Falling back-to MSI mode -- %d.\n", ret); 1564 1565 try_msi: 1566 /* Trying MSI */ 1567 ret = pci_enable_msi(ha->pdev); 1568 if (!ret) { 1569 ret = request_irq(ha->pdev->irq, qla4_8xxx_msi_handler, 1570 0, DRIVER_NAME, ha); 1571 if (!ret) { 1572 DEBUG2(ql4_printk(KERN_INFO, ha, "MSI: Enabled.\n")); 1573 set_bit(AF_MSI_ENABLED, &ha->flags); 1574 goto irq_attached; 1575 } else { 1576 ql4_printk(KERN_WARNING, ha, 1577 "MSI: Failed to reserve interrupt %d " 1578 "already in use.\n", ha->pdev->irq); 1579 pci_disable_msi(ha->pdev); 1580 } 1581 } 1582 1583 try_intx: 1584 if (is_qla8022(ha)) { 1585 ql4_printk(KERN_WARNING, ha, "%s: ISP82xx Legacy interrupt not supported\n", 1586 __func__); 1587 goto irq_not_attached; 1588 } 1589 1590 /* Trying INTx */ 1591 ret = request_irq(ha->pdev->irq, ha->isp_ops->intr_handler, 1592 IRQF_SHARED, DRIVER_NAME, ha); 1593 if (!ret) { 1594 DEBUG2(ql4_printk(KERN_INFO, ha, "INTx: Enabled.\n")); 1595 set_bit(AF_INTx_ENABLED, &ha->flags); 1596 goto irq_attached; 1597 1598 } else { 1599 ql4_printk(KERN_WARNING, ha, 1600 "INTx: Failed to reserve interrupt %d already in" 1601 " use.\n", ha->pdev->irq); 1602 goto irq_not_attached; 1603 } 1604 1605 irq_attached: 1606 set_bit(AF_IRQ_ATTACHED, &ha->flags); 1607 ha->host->irq = ha->pdev->irq; 1608 ql4_printk(KERN_INFO, ha, "%s: irq %d attached\n", 1609 __func__, ha->pdev->irq); 1610 rval = QLA_SUCCESS; 1611 irq_not_attached: 1612 return rval; 1613 } 1614 1615 void qla4xxx_free_irqs(struct scsi_qla_host *ha) 1616 { 1617 if (test_and_clear_bit(AF_IRQ_ATTACHED, &ha->flags)) { 1618 if (test_bit(AF_MSIX_ENABLED, &ha->flags)) { 1619 qla4_8xxx_disable_msix(ha); 1620 } else if (test_and_clear_bit(AF_MSI_ENABLED, &ha->flags)) { 1621 free_irq(ha->pdev->irq, ha); 1622 pci_disable_msi(ha->pdev); 1623 } else if (test_and_clear_bit(AF_INTx_ENABLED, &ha->flags)) { 1624 free_irq(ha->pdev->irq, ha); 1625 } 1626 } 1627 } 1628