1 /* 2 * QLogic iSCSI HBA Driver 3 * Copyright (c) 2003-2010 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 DEBUG2(printk(KERN_WARNING "scsi%ld: %s: Status Entry invalid " 127 "handle 0x%x, sp=%p. This cmd may have already " 128 "been completed.\n", ha->host_no, __func__, 129 le32_to_cpu(sts_entry->handle), srb)); 130 ql4_printk(KERN_WARNING, ha, "%s invalid status entry:" 131 " handle=0x%0x\n", __func__, sts_entry->handle); 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 /* 247 * If there is scsi_status, it takes precedense over 248 * underflow condition. 249 */ 250 if (scsi_status != 0) { 251 cmd->result = DID_OK << 16 | scsi_status; 252 253 if (scsi_status != SCSI_CHECK_CONDITION) 254 break; 255 256 /* Copy Sense Data into sense buffer. */ 257 qla4xxx_copy_sense(ha, sts_entry, srb); 258 } else { 259 /* 260 * If RISC reports underrun and target does not 261 * report it then we must have a lost frame, so 262 * tell upper layer to retry it by reporting a 263 * bus busy. 264 */ 265 if ((sts_entry->iscsiFlags & 266 ISCSI_FLAG_RESIDUAL_UNDER) == 0) { 267 cmd->result = DID_BUS_BUSY << 16; 268 } else if ((scsi_bufflen(cmd) - residual) < 269 cmd->underflow) { 270 /* 271 * Handle mid-layer underflow??? 272 * 273 * For kernels less than 2.4, the driver must 274 * return an error if an underflow is detected. 275 * For kernels equal-to and above 2.4, the 276 * mid-layer will appearantly handle the 277 * underflow by detecting the residual count -- 278 * unfortunately, we do not see where this is 279 * actually being done. In the interim, we 280 * will return DID_ERROR. 281 */ 282 DEBUG2(printk("scsi%ld:%d:%d:%d: %s: " 283 "Mid-layer Data underrun1, " 284 "xferlen = 0x%x, " 285 "residual = 0x%x\n", ha->host_no, 286 cmd->device->channel, 287 cmd->device->id, 288 cmd->device->lun, __func__, 289 scsi_bufflen(cmd), residual)); 290 291 cmd->result = DID_ERROR << 16; 292 } else { 293 cmd->result = DID_OK << 16; 294 } 295 } 296 break; 297 298 case SCS_DEVICE_LOGGED_OUT: 299 case SCS_DEVICE_UNAVAILABLE: 300 DEBUG2(printk(KERN_INFO "scsi%ld:%d:%d:%d: SCS_DEVICE " 301 "state: 0x%x\n", ha->host_no, 302 cmd->device->channel, cmd->device->id, 303 cmd->device->lun, sts_entry->completionStatus)); 304 /* 305 * Mark device missing so that we won't continue to 306 * send I/O to this device. We should get a ddb 307 * state change AEN soon. 308 */ 309 if (iscsi_is_session_online(ddb_entry->sess)) 310 qla4xxx_mark_device_missing(ddb_entry->sess); 311 312 cmd->result = DID_TRANSPORT_DISRUPTED << 16; 313 break; 314 315 case SCS_QUEUE_FULL: 316 /* 317 * SCSI Mid-Layer handles device queue full 318 */ 319 cmd->result = DID_OK << 16 | sts_entry->scsiStatus; 320 DEBUG2(printk("scsi%ld:%d:%d: %s: QUEUE FULL detected " 321 "compl=%02x, scsi=%02x, state=%02x, iFlags=%02x," 322 " iResp=%02x\n", ha->host_no, cmd->device->id, 323 cmd->device->lun, __func__, 324 sts_entry->completionStatus, 325 sts_entry->scsiStatus, sts_entry->state_flags, 326 sts_entry->iscsiFlags, 327 sts_entry->iscsiResponse)); 328 break; 329 330 default: 331 cmd->result = DID_ERROR << 16; 332 break; 333 } 334 335 status_entry_exit: 336 337 /* complete the request, if not waiting for status_continuation pkt */ 338 srb->cc_stat = sts_entry->completionStatus; 339 if (ha->status_srb == NULL) 340 kref_put(&srb->srb_ref, qla4xxx_srb_compl); 341 } 342 343 /** 344 * qla4xxx_passthru_status_entry - processes passthru status IOCBs (0x3C) 345 * @ha: Pointer to host adapter structure. 346 * @sts_entry: Pointer to status entry structure. 347 **/ 348 static void qla4xxx_passthru_status_entry(struct scsi_qla_host *ha, 349 struct passthru_status *sts_entry) 350 { 351 struct iscsi_task *task; 352 struct ddb_entry *ddb_entry; 353 struct ql4_task_data *task_data; 354 struct iscsi_cls_conn *cls_conn; 355 struct iscsi_conn *conn; 356 itt_t itt; 357 uint32_t fw_ddb_index; 358 359 itt = sts_entry->handle; 360 fw_ddb_index = le32_to_cpu(sts_entry->target); 361 362 ddb_entry = qla4xxx_lookup_ddb_by_fw_index(ha, fw_ddb_index); 363 364 if (ddb_entry == NULL) { 365 ql4_printk(KERN_ERR, ha, "%s: Invalid target index = 0x%x\n", 366 __func__, sts_entry->target); 367 return; 368 } 369 370 cls_conn = ddb_entry->conn; 371 conn = cls_conn->dd_data; 372 spin_lock(&conn->session->lock); 373 task = iscsi_itt_to_task(conn, itt); 374 spin_unlock(&conn->session->lock); 375 376 if (task == NULL) { 377 ql4_printk(KERN_ERR, ha, "%s: Task is NULL\n", __func__); 378 return; 379 } 380 381 task_data = task->dd_data; 382 memcpy(&task_data->sts, sts_entry, sizeof(struct passthru_status)); 383 ha->req_q_count += task_data->iocb_req_cnt; 384 ha->iocb_cnt -= task_data->iocb_req_cnt; 385 queue_work(ha->task_wq, &task_data->task_work); 386 } 387 388 /** 389 * qla4xxx_process_response_queue - process response queue completions 390 * @ha: Pointer to host adapter structure. 391 * 392 * This routine process response queue completions in interrupt context. 393 * Hardware_lock locked upon entry 394 **/ 395 void qla4xxx_process_response_queue(struct scsi_qla_host *ha) 396 { 397 uint32_t count = 0; 398 struct srb *srb = NULL; 399 struct status_entry *sts_entry; 400 401 /* Process all responses from response queue */ 402 while ((ha->response_ptr->signature != RESPONSE_PROCESSED)) { 403 sts_entry = (struct status_entry *) ha->response_ptr; 404 count++; 405 406 /* Advance pointers for next entry */ 407 if (ha->response_out == (RESPONSE_QUEUE_DEPTH - 1)) { 408 ha->response_out = 0; 409 ha->response_ptr = ha->response_ring; 410 } else { 411 ha->response_out++; 412 ha->response_ptr++; 413 } 414 415 /* process entry */ 416 switch (sts_entry->hdr.entryType) { 417 case ET_STATUS: 418 /* Common status */ 419 qla4xxx_status_entry(ha, sts_entry); 420 break; 421 422 case ET_PASSTHRU_STATUS: 423 if (sts_entry->hdr.systemDefined == SD_ISCSI_PDU) 424 qla4xxx_passthru_status_entry(ha, 425 (struct passthru_status *)sts_entry); 426 else 427 ql4_printk(KERN_ERR, ha, 428 "%s: Invalid status received\n", 429 __func__); 430 431 break; 432 433 case ET_STATUS_CONTINUATION: 434 qla4xxx_status_cont_entry(ha, 435 (struct status_cont_entry *) sts_entry); 436 break; 437 438 case ET_COMMAND: 439 /* ISP device queue is full. Command not 440 * accepted by ISP. Queue command for 441 * later */ 442 443 srb = qla4xxx_del_from_active_array(ha, 444 le32_to_cpu(sts_entry-> 445 handle)); 446 if (srb == NULL) 447 goto exit_prq_invalid_handle; 448 449 DEBUG2(printk("scsi%ld: %s: FW device queue full, " 450 "srb %p\n", ha->host_no, __func__, srb)); 451 452 /* ETRY normally by sending it back with 453 * DID_BUS_BUSY */ 454 srb->cmd->result = DID_BUS_BUSY << 16; 455 kref_put(&srb->srb_ref, qla4xxx_srb_compl); 456 break; 457 458 case ET_CONTINUE: 459 /* Just throw away the continuation entries */ 460 DEBUG2(printk("scsi%ld: %s: Continuation entry - " 461 "ignoring\n", ha->host_no, __func__)); 462 break; 463 464 default: 465 /* 466 * Invalid entry in response queue, reset RISC 467 * firmware. 468 */ 469 DEBUG2(printk("scsi%ld: %s: Invalid entry %x in " 470 "response queue \n", ha->host_no, 471 __func__, 472 sts_entry->hdr.entryType)); 473 goto exit_prq_error; 474 } 475 ((struct response *)sts_entry)->signature = RESPONSE_PROCESSED; 476 wmb(); 477 } 478 479 /* 480 * Tell ISP we're done with response(s). This also clears the interrupt. 481 */ 482 ha->isp_ops->complete_iocb(ha); 483 484 return; 485 486 exit_prq_invalid_handle: 487 DEBUG2(printk("scsi%ld: %s: Invalid handle(srb)=%p type=%x IOCS=%x\n", 488 ha->host_no, __func__, srb, sts_entry->hdr.entryType, 489 sts_entry->completionStatus)); 490 491 exit_prq_error: 492 ha->isp_ops->complete_iocb(ha); 493 set_bit(DPC_RESET_HA, &ha->dpc_flags); 494 } 495 496 /** 497 * qla4xxx_isr_decode_mailbox - decodes mailbox status 498 * @ha: Pointer to host adapter structure. 499 * @mailbox_status: Mailbox status. 500 * 501 * This routine decodes the mailbox status during the ISR. 502 * Hardware_lock locked upon entry. runs in interrupt context. 503 **/ 504 static void qla4xxx_isr_decode_mailbox(struct scsi_qla_host * ha, 505 uint32_t mbox_status) 506 { 507 int i; 508 uint32_t mbox_sts[MBOX_AEN_REG_COUNT]; 509 510 if ((mbox_status == MBOX_STS_BUSY) || 511 (mbox_status == MBOX_STS_INTERMEDIATE_COMPLETION) || 512 (mbox_status >> 12 == MBOX_COMPLETION_STATUS)) { 513 ha->mbox_status[0] = mbox_status; 514 515 if (test_bit(AF_MBOX_COMMAND, &ha->flags)) { 516 /* 517 * Copy all mailbox registers to a temporary 518 * location and set mailbox command done flag 519 */ 520 for (i = 0; i < ha->mbox_status_count; i++) 521 ha->mbox_status[i] = is_qla8022(ha) 522 ? readl(&ha->qla4_8xxx_reg->mailbox_out[i]) 523 : readl(&ha->reg->mailbox[i]); 524 525 set_bit(AF_MBOX_COMMAND_DONE, &ha->flags); 526 527 if (test_bit(AF_MBOX_COMMAND_NOPOLL, &ha->flags)) 528 complete(&ha->mbx_intr_comp); 529 } 530 } else if (mbox_status >> 12 == MBOX_ASYNC_EVENT_STATUS) { 531 for (i = 0; i < MBOX_AEN_REG_COUNT; i++) 532 mbox_sts[i] = is_qla8022(ha) 533 ? readl(&ha->qla4_8xxx_reg->mailbox_out[i]) 534 : readl(&ha->reg->mailbox[i]); 535 536 /* Immediately process the AENs that don't require much work. 537 * Only queue the database_changed AENs */ 538 if (ha->aen_log.count < MAX_AEN_ENTRIES) { 539 for (i = 0; i < MBOX_AEN_REG_COUNT; i++) 540 ha->aen_log.entry[ha->aen_log.count].mbox_sts[i] = 541 mbox_sts[i]; 542 ha->aen_log.count++; 543 } 544 switch (mbox_status) { 545 case MBOX_ASTS_SYSTEM_ERROR: 546 /* Log Mailbox registers */ 547 ql4_printk(KERN_INFO, ha, "%s: System Err\n", __func__); 548 qla4xxx_dump_registers(ha); 549 550 if (ql4xdontresethba) { 551 DEBUG2(printk("scsi%ld: %s:Don't Reset HBA\n", 552 ha->host_no, __func__)); 553 } else { 554 set_bit(AF_GET_CRASH_RECORD, &ha->flags); 555 set_bit(DPC_RESET_HA, &ha->dpc_flags); 556 } 557 break; 558 559 case MBOX_ASTS_REQUEST_TRANSFER_ERROR: 560 case MBOX_ASTS_RESPONSE_TRANSFER_ERROR: 561 case MBOX_ASTS_NVRAM_INVALID: 562 case MBOX_ASTS_IP_ADDRESS_CHANGED: 563 case MBOX_ASTS_DHCP_LEASE_EXPIRED: 564 DEBUG2(printk("scsi%ld: AEN %04x, ERROR Status, " 565 "Reset HA\n", ha->host_no, mbox_status)); 566 set_bit(DPC_RESET_HA, &ha->dpc_flags); 567 break; 568 569 case MBOX_ASTS_LINK_UP: 570 set_bit(AF_LINK_UP, &ha->flags); 571 if (test_bit(AF_INIT_DONE, &ha->flags)) 572 set_bit(DPC_LINK_CHANGED, &ha->dpc_flags); 573 574 ql4_printk(KERN_INFO, ha, "%s: LINK UP\n", __func__); 575 break; 576 577 case MBOX_ASTS_LINK_DOWN: 578 clear_bit(AF_LINK_UP, &ha->flags); 579 if (test_bit(AF_INIT_DONE, &ha->flags)) 580 set_bit(DPC_LINK_CHANGED, &ha->dpc_flags); 581 582 ql4_printk(KERN_INFO, ha, "%s: LINK DOWN\n", __func__); 583 break; 584 585 case MBOX_ASTS_HEARTBEAT: 586 ha->seconds_since_last_heartbeat = 0; 587 break; 588 589 case MBOX_ASTS_DHCP_LEASE_ACQUIRED: 590 DEBUG2(printk("scsi%ld: AEN %04x DHCP LEASE " 591 "ACQUIRED\n", ha->host_no, mbox_status)); 592 set_bit(DPC_GET_DHCP_IP_ADDR, &ha->dpc_flags); 593 break; 594 595 case MBOX_ASTS_PROTOCOL_STATISTIC_ALARM: 596 case MBOX_ASTS_SCSI_COMMAND_PDU_REJECTED: /* Target 597 * mode 598 * only */ 599 case MBOX_ASTS_UNSOLICITED_PDU_RECEIVED: /* Connection mode */ 600 case MBOX_ASTS_IPSEC_SYSTEM_FATAL_ERROR: 601 case MBOX_ASTS_SUBNET_STATE_CHANGE: 602 case MBOX_ASTS_DUPLICATE_IP: 603 /* No action */ 604 DEBUG2(printk("scsi%ld: AEN %04x\n", ha->host_no, 605 mbox_status)); 606 break; 607 608 case MBOX_ASTS_IP_ADDR_STATE_CHANGED: 609 printk("scsi%ld: AEN %04x, mbox_sts[2]=%04x, " 610 "mbox_sts[3]=%04x\n", ha->host_no, mbox_sts[0], 611 mbox_sts[2], mbox_sts[3]); 612 613 /* mbox_sts[2] = Old ACB state 614 * mbox_sts[3] = new ACB state */ 615 if ((mbox_sts[3] == ACB_STATE_VALID) && 616 ((mbox_sts[2] == ACB_STATE_TENTATIVE) || 617 (mbox_sts[2] == ACB_STATE_ACQUIRING))) 618 set_bit(DPC_GET_DHCP_IP_ADDR, &ha->dpc_flags); 619 else if ((mbox_sts[3] == ACB_STATE_ACQUIRING) && 620 (mbox_sts[2] == ACB_STATE_VALID)) 621 set_bit(DPC_RESET_HA, &ha->dpc_flags); 622 else if ((mbox_sts[3] == ACB_STATE_UNCONFIGURED)) 623 complete(&ha->disable_acb_comp); 624 break; 625 626 case MBOX_ASTS_MAC_ADDRESS_CHANGED: 627 case MBOX_ASTS_DNS: 628 /* No action */ 629 DEBUG2(printk(KERN_INFO "scsi%ld: AEN %04x, " 630 "mbox_sts[1]=%04x, mbox_sts[2]=%04x\n", 631 ha->host_no, mbox_sts[0], 632 mbox_sts[1], mbox_sts[2])); 633 break; 634 635 case MBOX_ASTS_SELF_TEST_FAILED: 636 case MBOX_ASTS_LOGIN_FAILED: 637 /* No action */ 638 DEBUG2(printk("scsi%ld: AEN %04x, mbox_sts[1]=%04x, " 639 "mbox_sts[2]=%04x, mbox_sts[3]=%04x\n", 640 ha->host_no, mbox_sts[0], mbox_sts[1], 641 mbox_sts[2], mbox_sts[3])); 642 break; 643 644 case MBOX_ASTS_DATABASE_CHANGED: 645 /* Queue AEN information and process it in the DPC 646 * routine */ 647 if (ha->aen_q_count > 0) { 648 649 /* decrement available counter */ 650 ha->aen_q_count--; 651 652 for (i = 0; i < MBOX_AEN_REG_COUNT; i++) 653 ha->aen_q[ha->aen_in].mbox_sts[i] = 654 mbox_sts[i]; 655 656 /* print debug message */ 657 DEBUG2(printk("scsi%ld: AEN[%d] %04x queued " 658 "mb1:0x%x mb2:0x%x mb3:0x%x " 659 "mb4:0x%x mb5:0x%x\n", 660 ha->host_no, ha->aen_in, 661 mbox_sts[0], mbox_sts[1], 662 mbox_sts[2], mbox_sts[3], 663 mbox_sts[4], mbox_sts[5])); 664 665 /* advance pointer */ 666 ha->aen_in++; 667 if (ha->aen_in == MAX_AEN_ENTRIES) 668 ha->aen_in = 0; 669 670 /* The DPC routine will process the aen */ 671 set_bit(DPC_AEN, &ha->dpc_flags); 672 } else { 673 DEBUG2(printk("scsi%ld: %s: aen %04x, queue " 674 "overflowed! AEN LOST!!\n", 675 ha->host_no, __func__, 676 mbox_sts[0])); 677 678 DEBUG2(printk("scsi%ld: DUMP AEN QUEUE\n", 679 ha->host_no)); 680 681 for (i = 0; i < MAX_AEN_ENTRIES; i++) { 682 DEBUG2(printk("AEN[%d] %04x %04x %04x " 683 "%04x\n", i, mbox_sts[0], 684 mbox_sts[1], mbox_sts[2], 685 mbox_sts[3])); 686 } 687 } 688 break; 689 690 case MBOX_ASTS_TXSCVR_INSERTED: 691 DEBUG2(printk(KERN_WARNING 692 "scsi%ld: AEN %04x Transceiver" 693 " inserted\n", ha->host_no, mbox_sts[0])); 694 break; 695 696 case MBOX_ASTS_TXSCVR_REMOVED: 697 DEBUG2(printk(KERN_WARNING 698 "scsi%ld: AEN %04x Transceiver" 699 " removed\n", ha->host_no, mbox_sts[0])); 700 break; 701 702 default: 703 DEBUG2(printk(KERN_WARNING 704 "scsi%ld: AEN %04x UNKNOWN\n", 705 ha->host_no, mbox_sts[0])); 706 break; 707 } 708 } else { 709 DEBUG2(printk("scsi%ld: Unknown mailbox status %08X\n", 710 ha->host_no, mbox_status)); 711 712 ha->mbox_status[0] = mbox_status; 713 } 714 } 715 716 /** 717 * qla4_8xxx_interrupt_service_routine - isr 718 * @ha: pointer to host adapter structure. 719 * 720 * This is the main interrupt service routine. 721 * hardware_lock locked upon entry. runs in interrupt context. 722 **/ 723 void qla4_8xxx_interrupt_service_routine(struct scsi_qla_host *ha, 724 uint32_t intr_status) 725 { 726 /* Process response queue interrupt. */ 727 if (intr_status & HSRX_RISC_IOCB_INT) 728 qla4xxx_process_response_queue(ha); 729 730 /* Process mailbox/asynch event interrupt.*/ 731 if (intr_status & HSRX_RISC_MB_INT) 732 qla4xxx_isr_decode_mailbox(ha, 733 readl(&ha->qla4_8xxx_reg->mailbox_out[0])); 734 735 /* clear the interrupt */ 736 writel(0, &ha->qla4_8xxx_reg->host_int); 737 readl(&ha->qla4_8xxx_reg->host_int); 738 } 739 740 /** 741 * qla4xxx_interrupt_service_routine - isr 742 * @ha: pointer to host adapter structure. 743 * 744 * This is the main interrupt service routine. 745 * hardware_lock locked upon entry. runs in interrupt context. 746 **/ 747 void qla4xxx_interrupt_service_routine(struct scsi_qla_host * ha, 748 uint32_t intr_status) 749 { 750 /* Process response queue interrupt. */ 751 if (intr_status & CSR_SCSI_COMPLETION_INTR) 752 qla4xxx_process_response_queue(ha); 753 754 /* Process mailbox/asynch event interrupt.*/ 755 if (intr_status & CSR_SCSI_PROCESSOR_INTR) { 756 qla4xxx_isr_decode_mailbox(ha, 757 readl(&ha->reg->mailbox[0])); 758 759 /* Clear Mailbox Interrupt */ 760 writel(set_rmask(CSR_SCSI_PROCESSOR_INTR), 761 &ha->reg->ctrl_status); 762 readl(&ha->reg->ctrl_status); 763 } 764 } 765 766 /** 767 * qla4_8xxx_spurious_interrupt - processes spurious interrupt 768 * @ha: pointer to host adapter structure. 769 * @reqs_count: . 770 * 771 **/ 772 static void qla4_8xxx_spurious_interrupt(struct scsi_qla_host *ha, 773 uint8_t reqs_count) 774 { 775 if (reqs_count) 776 return; 777 778 DEBUG2(ql4_printk(KERN_INFO, ha, "Spurious Interrupt\n")); 779 if (is_qla8022(ha)) { 780 writel(0, &ha->qla4_8xxx_reg->host_int); 781 if (test_bit(AF_INTx_ENABLED, &ha->flags)) 782 qla4_8xxx_wr_32(ha, ha->nx_legacy_intr.tgt_mask_reg, 783 0xfbff); 784 } 785 ha->spurious_int_count++; 786 } 787 788 /** 789 * qla4xxx_intr_handler - hardware interrupt handler. 790 * @irq: Unused 791 * @dev_id: Pointer to host adapter structure 792 **/ 793 irqreturn_t qla4xxx_intr_handler(int irq, void *dev_id) 794 { 795 struct scsi_qla_host *ha; 796 uint32_t intr_status; 797 unsigned long flags = 0; 798 uint8_t reqs_count = 0; 799 800 ha = (struct scsi_qla_host *) dev_id; 801 if (!ha) { 802 DEBUG2(printk(KERN_INFO 803 "qla4xxx: Interrupt with NULL host ptr\n")); 804 return IRQ_NONE; 805 } 806 807 spin_lock_irqsave(&ha->hardware_lock, flags); 808 809 ha->isr_count++; 810 /* 811 * Repeatedly service interrupts up to a maximum of 812 * MAX_REQS_SERVICED_PER_INTR 813 */ 814 while (1) { 815 /* 816 * Read interrupt status 817 */ 818 if (ha->isp_ops->rd_shdw_rsp_q_in(ha) != 819 ha->response_out) 820 intr_status = CSR_SCSI_COMPLETION_INTR; 821 else 822 intr_status = readl(&ha->reg->ctrl_status); 823 824 if ((intr_status & 825 (CSR_SCSI_RESET_INTR|CSR_FATAL_ERROR|INTR_PENDING)) == 0) { 826 if (reqs_count == 0) 827 ha->spurious_int_count++; 828 break; 829 } 830 831 if (intr_status & CSR_FATAL_ERROR) { 832 DEBUG2(printk(KERN_INFO "scsi%ld: Fatal Error, " 833 "Status 0x%04x\n", ha->host_no, 834 readl(isp_port_error_status (ha)))); 835 836 /* Issue Soft Reset to clear this error condition. 837 * This will prevent the RISC from repeatedly 838 * interrupting the driver; thus, allowing the DPC to 839 * get scheduled to continue error recovery. 840 * NOTE: Disabling RISC interrupts does not work in 841 * this case, as CSR_FATAL_ERROR overrides 842 * CSR_SCSI_INTR_ENABLE */ 843 if ((readl(&ha->reg->ctrl_status) & 844 CSR_SCSI_RESET_INTR) == 0) { 845 writel(set_rmask(CSR_SOFT_RESET), 846 &ha->reg->ctrl_status); 847 readl(&ha->reg->ctrl_status); 848 } 849 850 writel(set_rmask(CSR_FATAL_ERROR), 851 &ha->reg->ctrl_status); 852 readl(&ha->reg->ctrl_status); 853 854 __qla4xxx_disable_intrs(ha); 855 856 set_bit(DPC_RESET_HA, &ha->dpc_flags); 857 858 break; 859 } else if (intr_status & CSR_SCSI_RESET_INTR) { 860 clear_bit(AF_ONLINE, &ha->flags); 861 __qla4xxx_disable_intrs(ha); 862 863 writel(set_rmask(CSR_SCSI_RESET_INTR), 864 &ha->reg->ctrl_status); 865 readl(&ha->reg->ctrl_status); 866 867 if (!test_bit(AF_HA_REMOVAL, &ha->flags)) 868 set_bit(DPC_RESET_HA_INTR, &ha->dpc_flags); 869 870 break; 871 } else if (intr_status & INTR_PENDING) { 872 ha->isp_ops->interrupt_service_routine(ha, intr_status); 873 ha->total_io_count++; 874 if (++reqs_count == MAX_REQS_SERVICED_PER_INTR) 875 break; 876 } 877 } 878 879 spin_unlock_irqrestore(&ha->hardware_lock, flags); 880 881 return IRQ_HANDLED; 882 } 883 884 /** 885 * qla4_8xxx_intr_handler - hardware interrupt handler. 886 * @irq: Unused 887 * @dev_id: Pointer to host adapter structure 888 **/ 889 irqreturn_t qla4_8xxx_intr_handler(int irq, void *dev_id) 890 { 891 struct scsi_qla_host *ha = dev_id; 892 uint32_t intr_status; 893 uint32_t status; 894 unsigned long flags = 0; 895 uint8_t reqs_count = 0; 896 897 if (unlikely(pci_channel_offline(ha->pdev))) 898 return IRQ_HANDLED; 899 900 ha->isr_count++; 901 status = qla4_8xxx_rd_32(ha, ISR_INT_VECTOR); 902 if (!(status & ha->nx_legacy_intr.int_vec_bit)) 903 return IRQ_NONE; 904 905 status = qla4_8xxx_rd_32(ha, ISR_INT_STATE_REG); 906 if (!ISR_IS_LEGACY_INTR_TRIGGERED(status)) { 907 DEBUG2(ql4_printk(KERN_INFO, ha, 908 "%s legacy Int not triggered\n", __func__)); 909 return IRQ_NONE; 910 } 911 912 /* clear the interrupt */ 913 qla4_8xxx_wr_32(ha, ha->nx_legacy_intr.tgt_status_reg, 0xffffffff); 914 915 /* read twice to ensure write is flushed */ 916 qla4_8xxx_rd_32(ha, ISR_INT_VECTOR); 917 qla4_8xxx_rd_32(ha, ISR_INT_VECTOR); 918 919 spin_lock_irqsave(&ha->hardware_lock, flags); 920 while (1) { 921 if (!(readl(&ha->qla4_8xxx_reg->host_int) & 922 ISRX_82XX_RISC_INT)) { 923 qla4_8xxx_spurious_interrupt(ha, reqs_count); 924 break; 925 } 926 intr_status = readl(&ha->qla4_8xxx_reg->host_status); 927 if ((intr_status & 928 (HSRX_RISC_MB_INT | HSRX_RISC_IOCB_INT)) == 0) { 929 qla4_8xxx_spurious_interrupt(ha, reqs_count); 930 break; 931 } 932 933 ha->isp_ops->interrupt_service_routine(ha, intr_status); 934 935 /* Enable Interrupt */ 936 qla4_8xxx_wr_32(ha, ha->nx_legacy_intr.tgt_mask_reg, 0xfbff); 937 938 if (++reqs_count == MAX_REQS_SERVICED_PER_INTR) 939 break; 940 } 941 942 spin_unlock_irqrestore(&ha->hardware_lock, flags); 943 return IRQ_HANDLED; 944 } 945 946 irqreturn_t 947 qla4_8xxx_msi_handler(int irq, void *dev_id) 948 { 949 struct scsi_qla_host *ha; 950 951 ha = (struct scsi_qla_host *) dev_id; 952 if (!ha) { 953 DEBUG2(printk(KERN_INFO 954 "qla4xxx: MSIX: Interrupt with NULL host ptr\n")); 955 return IRQ_NONE; 956 } 957 958 ha->isr_count++; 959 /* clear the interrupt */ 960 qla4_8xxx_wr_32(ha, ha->nx_legacy_intr.tgt_status_reg, 0xffffffff); 961 962 /* read twice to ensure write is flushed */ 963 qla4_8xxx_rd_32(ha, ISR_INT_VECTOR); 964 qla4_8xxx_rd_32(ha, ISR_INT_VECTOR); 965 966 return qla4_8xxx_default_intr_handler(irq, dev_id); 967 } 968 969 /** 970 * qla4_8xxx_default_intr_handler - hardware interrupt handler. 971 * @irq: Unused 972 * @dev_id: Pointer to host adapter structure 973 * 974 * This interrupt handler is called directly for MSI-X, and 975 * called indirectly for MSI. 976 **/ 977 irqreturn_t 978 qla4_8xxx_default_intr_handler(int irq, void *dev_id) 979 { 980 struct scsi_qla_host *ha = dev_id; 981 unsigned long flags; 982 uint32_t intr_status; 983 uint8_t reqs_count = 0; 984 985 spin_lock_irqsave(&ha->hardware_lock, flags); 986 while (1) { 987 if (!(readl(&ha->qla4_8xxx_reg->host_int) & 988 ISRX_82XX_RISC_INT)) { 989 qla4_8xxx_spurious_interrupt(ha, reqs_count); 990 break; 991 } 992 993 intr_status = readl(&ha->qla4_8xxx_reg->host_status); 994 if ((intr_status & 995 (HSRX_RISC_MB_INT | HSRX_RISC_IOCB_INT)) == 0) { 996 qla4_8xxx_spurious_interrupt(ha, reqs_count); 997 break; 998 } 999 1000 ha->isp_ops->interrupt_service_routine(ha, intr_status); 1001 1002 if (++reqs_count == MAX_REQS_SERVICED_PER_INTR) 1003 break; 1004 } 1005 1006 ha->isr_count++; 1007 spin_unlock_irqrestore(&ha->hardware_lock, flags); 1008 return IRQ_HANDLED; 1009 } 1010 1011 irqreturn_t 1012 qla4_8xxx_msix_rsp_q(int irq, void *dev_id) 1013 { 1014 struct scsi_qla_host *ha = dev_id; 1015 unsigned long flags; 1016 1017 spin_lock_irqsave(&ha->hardware_lock, flags); 1018 qla4xxx_process_response_queue(ha); 1019 writel(0, &ha->qla4_8xxx_reg->host_int); 1020 spin_unlock_irqrestore(&ha->hardware_lock, flags); 1021 1022 ha->isr_count++; 1023 return IRQ_HANDLED; 1024 } 1025 1026 /** 1027 * qla4xxx_process_aen - processes AENs generated by firmware 1028 * @ha: pointer to host adapter structure. 1029 * @process_aen: type of AENs to process 1030 * 1031 * Processes specific types of Asynchronous Events generated by firmware. 1032 * The type of AENs to process is specified by process_aen and can be 1033 * PROCESS_ALL_AENS 0 1034 * FLUSH_DDB_CHANGED_AENS 1 1035 * RELOGIN_DDB_CHANGED_AENS 2 1036 **/ 1037 void qla4xxx_process_aen(struct scsi_qla_host * ha, uint8_t process_aen) 1038 { 1039 uint32_t mbox_sts[MBOX_AEN_REG_COUNT]; 1040 struct aen *aen; 1041 int i; 1042 unsigned long flags; 1043 1044 spin_lock_irqsave(&ha->hardware_lock, flags); 1045 while (ha->aen_out != ha->aen_in) { 1046 aen = &ha->aen_q[ha->aen_out]; 1047 /* copy aen information to local structure */ 1048 for (i = 0; i < MBOX_AEN_REG_COUNT; i++) 1049 mbox_sts[i] = aen->mbox_sts[i]; 1050 1051 ha->aen_q_count++; 1052 ha->aen_out++; 1053 1054 if (ha->aen_out == MAX_AEN_ENTRIES) 1055 ha->aen_out = 0; 1056 1057 spin_unlock_irqrestore(&ha->hardware_lock, flags); 1058 1059 DEBUG2(printk("qla4xxx(%ld): AEN[%d]=0x%08x, mbx1=0x%08x mbx2=0x%08x" 1060 " mbx3=0x%08x mbx4=0x%08x\n", ha->host_no, 1061 (ha->aen_out ? (ha->aen_out-1): (MAX_AEN_ENTRIES-1)), 1062 mbox_sts[0], mbox_sts[1], mbox_sts[2], 1063 mbox_sts[3], mbox_sts[4])); 1064 1065 switch (mbox_sts[0]) { 1066 case MBOX_ASTS_DATABASE_CHANGED: 1067 switch (process_aen) { 1068 case FLUSH_DDB_CHANGED_AENS: 1069 DEBUG2(printk("scsi%ld: AEN[%d] %04x, index " 1070 "[%d] state=%04x FLUSHED!\n", 1071 ha->host_no, ha->aen_out, 1072 mbox_sts[0], mbox_sts[2], 1073 mbox_sts[3])); 1074 break; 1075 case PROCESS_ALL_AENS: 1076 default: 1077 /* Specific device. */ 1078 if (mbox_sts[1] == 1) 1079 qla4xxx_process_ddb_changed(ha, 1080 mbox_sts[2], mbox_sts[3], 1081 mbox_sts[4]); 1082 break; 1083 } 1084 } 1085 spin_lock_irqsave(&ha->hardware_lock, flags); 1086 } 1087 spin_unlock_irqrestore(&ha->hardware_lock, flags); 1088 } 1089 1090 int qla4xxx_request_irqs(struct scsi_qla_host *ha) 1091 { 1092 int ret; 1093 1094 if (!is_qla8022(ha)) 1095 goto try_intx; 1096 1097 if (ql4xenablemsix == 2) 1098 goto try_msi; 1099 1100 if (ql4xenablemsix == 0 || ql4xenablemsix != 1) 1101 goto try_intx; 1102 1103 /* Trying MSI-X */ 1104 ret = qla4_8xxx_enable_msix(ha); 1105 if (!ret) { 1106 DEBUG2(ql4_printk(KERN_INFO, ha, 1107 "MSI-X: Enabled (0x%X).\n", ha->revision_id)); 1108 goto irq_attached; 1109 } 1110 1111 ql4_printk(KERN_WARNING, ha, 1112 "MSI-X: Falling back-to MSI mode -- %d.\n", ret); 1113 1114 try_msi: 1115 /* Trying MSI */ 1116 ret = pci_enable_msi(ha->pdev); 1117 if (!ret) { 1118 ret = request_irq(ha->pdev->irq, qla4_8xxx_msi_handler, 1119 0, DRIVER_NAME, ha); 1120 if (!ret) { 1121 DEBUG2(ql4_printk(KERN_INFO, ha, "MSI: Enabled.\n")); 1122 set_bit(AF_MSI_ENABLED, &ha->flags); 1123 goto irq_attached; 1124 } else { 1125 ql4_printk(KERN_WARNING, ha, 1126 "MSI: Failed to reserve interrupt %d " 1127 "already in use.\n", ha->pdev->irq); 1128 pci_disable_msi(ha->pdev); 1129 } 1130 } 1131 ql4_printk(KERN_WARNING, ha, 1132 "MSI: Falling back-to INTx mode -- %d.\n", ret); 1133 1134 try_intx: 1135 /* Trying INTx */ 1136 ret = request_irq(ha->pdev->irq, ha->isp_ops->intr_handler, 1137 IRQF_SHARED, DRIVER_NAME, ha); 1138 if (!ret) { 1139 DEBUG2(ql4_printk(KERN_INFO, ha, "INTx: Enabled.\n")); 1140 set_bit(AF_INTx_ENABLED, &ha->flags); 1141 goto irq_attached; 1142 1143 } else { 1144 ql4_printk(KERN_WARNING, ha, 1145 "INTx: Failed to reserve interrupt %d already in" 1146 " use.\n", ha->pdev->irq); 1147 return ret; 1148 } 1149 1150 irq_attached: 1151 set_bit(AF_IRQ_ATTACHED, &ha->flags); 1152 ha->host->irq = ha->pdev->irq; 1153 ql4_printk(KERN_INFO, ha, "%s: irq %d attached\n", 1154 __func__, ha->pdev->irq); 1155 return ret; 1156 } 1157 1158 void qla4xxx_free_irqs(struct scsi_qla_host *ha) 1159 { 1160 if (test_bit(AF_MSIX_ENABLED, &ha->flags)) 1161 qla4_8xxx_disable_msix(ha); 1162 else if (test_and_clear_bit(AF_MSI_ENABLED, &ha->flags)) { 1163 free_irq(ha->pdev->irq, ha); 1164 pci_disable_msi(ha->pdev); 1165 } else if (test_and_clear_bit(AF_INTx_ENABLED, &ha->flags)) 1166 free_irq(ha->pdev->irq, ha); 1167 } 1168