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