ql4_isr.c revision 7664a1fd76d2eb49b07443f5fc46c75f6a95c98b
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 **/ 19static 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 */ 74static void 75qla4xxx_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 **/ 115static 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_qla8022(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 308check_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 351status_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 **/ 364static 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 404static 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 425static 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 **/ 476void 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 574exit_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 579exit_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 **/ 592static 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]; 597 598 if ((mbox_status == MBOX_STS_BUSY) || 599 (mbox_status == MBOX_STS_INTERMEDIATE_COMPLETION) || 600 (mbox_status >> 12 == MBOX_COMPLETION_STATUS)) { 601 ha->mbox_status[0] = mbox_status; 602 603 if (test_bit(AF_MBOX_COMMAND, &ha->flags)) { 604 /* 605 * Copy all mailbox registers to a temporary 606 * location and set mailbox command done flag 607 */ 608 for (i = 0; i < ha->mbox_status_count; i++) 609 ha->mbox_status[i] = is_qla8022(ha) 610 ? readl(&ha->qla4_82xx_reg->mailbox_out[i]) 611 : readl(&ha->reg->mailbox[i]); 612 613 set_bit(AF_MBOX_COMMAND_DONE, &ha->flags); 614 615 if (test_bit(AF_MBOX_COMMAND_NOPOLL, &ha->flags)) 616 complete(&ha->mbx_intr_comp); 617 } 618 } else if (mbox_status >> 12 == MBOX_ASYNC_EVENT_STATUS) { 619 for (i = 0; i < MBOX_AEN_REG_COUNT; i++) 620 mbox_sts[i] = is_qla8022(ha) 621 ? readl(&ha->qla4_82xx_reg->mailbox_out[i]) 622 : readl(&ha->reg->mailbox[i]); 623 624 /* Immediately process the AENs that don't require much work. 625 * Only queue the database_changed AENs */ 626 if (ha->aen_log.count < MAX_AEN_ENTRIES) { 627 for (i = 0; i < MBOX_AEN_REG_COUNT; i++) 628 ha->aen_log.entry[ha->aen_log.count].mbox_sts[i] = 629 mbox_sts[i]; 630 ha->aen_log.count++; 631 } 632 switch (mbox_status) { 633 case MBOX_ASTS_SYSTEM_ERROR: 634 /* Log Mailbox registers */ 635 ql4_printk(KERN_INFO, ha, "%s: System Err\n", __func__); 636 qla4xxx_dump_registers(ha); 637 638 if (ql4xdontresethba) { 639 DEBUG2(printk("scsi%ld: %s:Don't Reset HBA\n", 640 ha->host_no, __func__)); 641 } else { 642 set_bit(AF_GET_CRASH_RECORD, &ha->flags); 643 set_bit(DPC_RESET_HA, &ha->dpc_flags); 644 } 645 break; 646 647 case MBOX_ASTS_REQUEST_TRANSFER_ERROR: 648 case MBOX_ASTS_RESPONSE_TRANSFER_ERROR: 649 case MBOX_ASTS_NVRAM_INVALID: 650 case MBOX_ASTS_IP_ADDRESS_CHANGED: 651 case MBOX_ASTS_DHCP_LEASE_EXPIRED: 652 DEBUG2(printk("scsi%ld: AEN %04x, ERROR Status, " 653 "Reset HA\n", ha->host_no, mbox_status)); 654 if (is_qla8022(ha)) 655 set_bit(DPC_RESET_HA_FW_CONTEXT, 656 &ha->dpc_flags); 657 else 658 set_bit(DPC_RESET_HA, &ha->dpc_flags); 659 break; 660 661 case MBOX_ASTS_LINK_UP: 662 set_bit(AF_LINK_UP, &ha->flags); 663 if (test_bit(AF_INIT_DONE, &ha->flags)) 664 set_bit(DPC_LINK_CHANGED, &ha->dpc_flags); 665 666 ql4_printk(KERN_INFO, ha, "%s: LINK UP\n", __func__); 667 qla4xxx_post_aen_work(ha, ISCSI_EVENT_LINKUP, 668 sizeof(mbox_sts), 669 (uint8_t *) mbox_sts); 670 break; 671 672 case MBOX_ASTS_LINK_DOWN: 673 clear_bit(AF_LINK_UP, &ha->flags); 674 if (test_bit(AF_INIT_DONE, &ha->flags)) 675 set_bit(DPC_LINK_CHANGED, &ha->dpc_flags); 676 677 ql4_printk(KERN_INFO, ha, "%s: LINK DOWN\n", __func__); 678 qla4xxx_post_aen_work(ha, ISCSI_EVENT_LINKDOWN, 679 sizeof(mbox_sts), 680 (uint8_t *) mbox_sts); 681 break; 682 683 case MBOX_ASTS_HEARTBEAT: 684 ha->seconds_since_last_heartbeat = 0; 685 break; 686 687 case MBOX_ASTS_DHCP_LEASE_ACQUIRED: 688 DEBUG2(printk("scsi%ld: AEN %04x DHCP LEASE " 689 "ACQUIRED\n", ha->host_no, mbox_status)); 690 set_bit(DPC_GET_DHCP_IP_ADDR, &ha->dpc_flags); 691 break; 692 693 case MBOX_ASTS_PROTOCOL_STATISTIC_ALARM: 694 case MBOX_ASTS_SCSI_COMMAND_PDU_REJECTED: /* Target 695 * mode 696 * only */ 697 case MBOX_ASTS_UNSOLICITED_PDU_RECEIVED: /* Connection mode */ 698 case MBOX_ASTS_IPSEC_SYSTEM_FATAL_ERROR: 699 case MBOX_ASTS_SUBNET_STATE_CHANGE: 700 case MBOX_ASTS_DUPLICATE_IP: 701 /* No action */ 702 DEBUG2(printk("scsi%ld: AEN %04x\n", ha->host_no, 703 mbox_status)); 704 break; 705 706 case MBOX_ASTS_IP_ADDR_STATE_CHANGED: 707 printk("scsi%ld: AEN %04x, mbox_sts[2]=%04x, " 708 "mbox_sts[3]=%04x\n", ha->host_no, mbox_sts[0], 709 mbox_sts[2], mbox_sts[3]); 710 711 /* mbox_sts[2] = Old ACB state 712 * mbox_sts[3] = new ACB state */ 713 if ((mbox_sts[3] == ACB_STATE_VALID) && 714 ((mbox_sts[2] == ACB_STATE_TENTATIVE) || 715 (mbox_sts[2] == ACB_STATE_ACQUIRING))) 716 set_bit(DPC_GET_DHCP_IP_ADDR, &ha->dpc_flags); 717 else if ((mbox_sts[3] == ACB_STATE_ACQUIRING) && 718 (mbox_sts[2] == ACB_STATE_VALID)) { 719 if (is_qla8022(ha)) 720 set_bit(DPC_RESET_HA_FW_CONTEXT, 721 &ha->dpc_flags); 722 else 723 set_bit(DPC_RESET_HA, &ha->dpc_flags); 724 } else if ((mbox_sts[3] == ACB_STATE_UNCONFIGURED)) 725 complete(&ha->disable_acb_comp); 726 break; 727 728 case MBOX_ASTS_MAC_ADDRESS_CHANGED: 729 case MBOX_ASTS_DNS: 730 /* No action */ 731 DEBUG2(printk(KERN_INFO "scsi%ld: AEN %04x, " 732 "mbox_sts[1]=%04x, mbox_sts[2]=%04x\n", 733 ha->host_no, mbox_sts[0], 734 mbox_sts[1], mbox_sts[2])); 735 break; 736 737 case MBOX_ASTS_SELF_TEST_FAILED: 738 case MBOX_ASTS_LOGIN_FAILED: 739 /* No action */ 740 DEBUG2(printk("scsi%ld: AEN %04x, mbox_sts[1]=%04x, " 741 "mbox_sts[2]=%04x, mbox_sts[3]=%04x\n", 742 ha->host_no, mbox_sts[0], mbox_sts[1], 743 mbox_sts[2], mbox_sts[3])); 744 break; 745 746 case MBOX_ASTS_DATABASE_CHANGED: 747 /* Queue AEN information and process it in the DPC 748 * routine */ 749 if (ha->aen_q_count > 0) { 750 751 /* decrement available counter */ 752 ha->aen_q_count--; 753 754 for (i = 0; i < MBOX_AEN_REG_COUNT; i++) 755 ha->aen_q[ha->aen_in].mbox_sts[i] = 756 mbox_sts[i]; 757 758 /* print debug message */ 759 DEBUG2(printk("scsi%ld: AEN[%d] %04x queued " 760 "mb1:0x%x mb2:0x%x mb3:0x%x " 761 "mb4:0x%x mb5:0x%x\n", 762 ha->host_no, ha->aen_in, 763 mbox_sts[0], mbox_sts[1], 764 mbox_sts[2], mbox_sts[3], 765 mbox_sts[4], mbox_sts[5])); 766 767 /* advance pointer */ 768 ha->aen_in++; 769 if (ha->aen_in == MAX_AEN_ENTRIES) 770 ha->aen_in = 0; 771 772 /* The DPC routine will process the aen */ 773 set_bit(DPC_AEN, &ha->dpc_flags); 774 } else { 775 DEBUG2(printk("scsi%ld: %s: aen %04x, queue " 776 "overflowed! AEN LOST!!\n", 777 ha->host_no, __func__, 778 mbox_sts[0])); 779 780 DEBUG2(printk("scsi%ld: DUMP AEN QUEUE\n", 781 ha->host_no)); 782 783 for (i = 0; i < MAX_AEN_ENTRIES; i++) { 784 DEBUG2(printk("AEN[%d] %04x %04x %04x " 785 "%04x\n", i, mbox_sts[0], 786 mbox_sts[1], mbox_sts[2], 787 mbox_sts[3])); 788 } 789 } 790 break; 791 792 case MBOX_ASTS_TXSCVR_INSERTED: 793 DEBUG2(printk(KERN_WARNING 794 "scsi%ld: AEN %04x Transceiver" 795 " inserted\n", ha->host_no, mbox_sts[0])); 796 break; 797 798 case MBOX_ASTS_TXSCVR_REMOVED: 799 DEBUG2(printk(KERN_WARNING 800 "scsi%ld: AEN %04x Transceiver" 801 " removed\n", ha->host_no, mbox_sts[0])); 802 break; 803 804 default: 805 DEBUG2(printk(KERN_WARNING 806 "scsi%ld: AEN %04x UNKNOWN\n", 807 ha->host_no, mbox_sts[0])); 808 break; 809 } 810 } else { 811 DEBUG2(printk("scsi%ld: Unknown mailbox status %08X\n", 812 ha->host_no, mbox_status)); 813 814 ha->mbox_status[0] = mbox_status; 815 } 816} 817 818/** 819 * qla4_82xx_interrupt_service_routine - isr 820 * @ha: pointer to host adapter structure. 821 * 822 * This is the main interrupt service routine. 823 * hardware_lock locked upon entry. runs in interrupt context. 824 **/ 825void qla4_82xx_interrupt_service_routine(struct scsi_qla_host *ha, 826 uint32_t intr_status) 827{ 828 /* Process response queue interrupt. */ 829 if (intr_status & HSRX_RISC_IOCB_INT) 830 qla4xxx_process_response_queue(ha); 831 832 /* Process mailbox/asynch event interrupt.*/ 833 if (intr_status & HSRX_RISC_MB_INT) 834 qla4xxx_isr_decode_mailbox(ha, 835 readl(&ha->qla4_82xx_reg->mailbox_out[0])); 836 837 /* clear the interrupt */ 838 writel(0, &ha->qla4_82xx_reg->host_int); 839 readl(&ha->qla4_82xx_reg->host_int); 840} 841 842/** 843 * qla4xxx_interrupt_service_routine - isr 844 * @ha: pointer to host adapter structure. 845 * 846 * This is the main interrupt service routine. 847 * hardware_lock locked upon entry. runs in interrupt context. 848 **/ 849void qla4xxx_interrupt_service_routine(struct scsi_qla_host * ha, 850 uint32_t intr_status) 851{ 852 /* Process response queue interrupt. */ 853 if (intr_status & CSR_SCSI_COMPLETION_INTR) 854 qla4xxx_process_response_queue(ha); 855 856 /* Process mailbox/asynch event interrupt.*/ 857 if (intr_status & CSR_SCSI_PROCESSOR_INTR) { 858 qla4xxx_isr_decode_mailbox(ha, 859 readl(&ha->reg->mailbox[0])); 860 861 /* Clear Mailbox Interrupt */ 862 writel(set_rmask(CSR_SCSI_PROCESSOR_INTR), 863 &ha->reg->ctrl_status); 864 readl(&ha->reg->ctrl_status); 865 } 866} 867 868/** 869 * qla4_82xx_spurious_interrupt - processes spurious interrupt 870 * @ha: pointer to host adapter structure. 871 * @reqs_count: . 872 * 873 **/ 874static void qla4_82xx_spurious_interrupt(struct scsi_qla_host *ha, 875 uint8_t reqs_count) 876{ 877 if (reqs_count) 878 return; 879 880 DEBUG2(ql4_printk(KERN_INFO, ha, "Spurious Interrupt\n")); 881 if (is_qla8022(ha)) { 882 writel(0, &ha->qla4_82xx_reg->host_int); 883 if (test_bit(AF_INTx_ENABLED, &ha->flags)) 884 qla4_82xx_wr_32(ha, ha->nx_legacy_intr.tgt_mask_reg, 885 0xfbff); 886 } 887 ha->spurious_int_count++; 888} 889 890/** 891 * qla4xxx_intr_handler - hardware interrupt handler. 892 * @irq: Unused 893 * @dev_id: Pointer to host adapter structure 894 **/ 895irqreturn_t qla4xxx_intr_handler(int irq, void *dev_id) 896{ 897 struct scsi_qla_host *ha; 898 uint32_t intr_status; 899 unsigned long flags = 0; 900 uint8_t reqs_count = 0; 901 902 ha = (struct scsi_qla_host *) dev_id; 903 if (!ha) { 904 DEBUG2(printk(KERN_INFO 905 "qla4xxx: Interrupt with NULL host ptr\n")); 906 return IRQ_NONE; 907 } 908 909 spin_lock_irqsave(&ha->hardware_lock, flags); 910 911 ha->isr_count++; 912 /* 913 * Repeatedly service interrupts up to a maximum of 914 * MAX_REQS_SERVICED_PER_INTR 915 */ 916 while (1) { 917 /* 918 * Read interrupt status 919 */ 920 if (ha->isp_ops->rd_shdw_rsp_q_in(ha) != 921 ha->response_out) 922 intr_status = CSR_SCSI_COMPLETION_INTR; 923 else 924 intr_status = readl(&ha->reg->ctrl_status); 925 926 if ((intr_status & 927 (CSR_SCSI_RESET_INTR|CSR_FATAL_ERROR|INTR_PENDING)) == 0) { 928 if (reqs_count == 0) 929 ha->spurious_int_count++; 930 break; 931 } 932 933 if (intr_status & CSR_FATAL_ERROR) { 934 DEBUG2(printk(KERN_INFO "scsi%ld: Fatal Error, " 935 "Status 0x%04x\n", ha->host_no, 936 readl(isp_port_error_status (ha)))); 937 938 /* Issue Soft Reset to clear this error condition. 939 * This will prevent the RISC from repeatedly 940 * interrupting the driver; thus, allowing the DPC to 941 * get scheduled to continue error recovery. 942 * NOTE: Disabling RISC interrupts does not work in 943 * this case, as CSR_FATAL_ERROR overrides 944 * CSR_SCSI_INTR_ENABLE */ 945 if ((readl(&ha->reg->ctrl_status) & 946 CSR_SCSI_RESET_INTR) == 0) { 947 writel(set_rmask(CSR_SOFT_RESET), 948 &ha->reg->ctrl_status); 949 readl(&ha->reg->ctrl_status); 950 } 951 952 writel(set_rmask(CSR_FATAL_ERROR), 953 &ha->reg->ctrl_status); 954 readl(&ha->reg->ctrl_status); 955 956 __qla4xxx_disable_intrs(ha); 957 958 set_bit(DPC_RESET_HA, &ha->dpc_flags); 959 960 break; 961 } else if (intr_status & CSR_SCSI_RESET_INTR) { 962 clear_bit(AF_ONLINE, &ha->flags); 963 __qla4xxx_disable_intrs(ha); 964 965 writel(set_rmask(CSR_SCSI_RESET_INTR), 966 &ha->reg->ctrl_status); 967 readl(&ha->reg->ctrl_status); 968 969 if (!test_bit(AF_HA_REMOVAL, &ha->flags)) 970 set_bit(DPC_RESET_HA_INTR, &ha->dpc_flags); 971 972 break; 973 } else if (intr_status & INTR_PENDING) { 974 ha->isp_ops->interrupt_service_routine(ha, intr_status); 975 ha->total_io_count++; 976 if (++reqs_count == MAX_REQS_SERVICED_PER_INTR) 977 break; 978 } 979 } 980 981 spin_unlock_irqrestore(&ha->hardware_lock, flags); 982 983 return IRQ_HANDLED; 984} 985 986/** 987 * qla4_82xx_intr_handler - hardware interrupt handler. 988 * @irq: Unused 989 * @dev_id: Pointer to host adapter structure 990 **/ 991irqreturn_t qla4_82xx_intr_handler(int irq, void *dev_id) 992{ 993 struct scsi_qla_host *ha = dev_id; 994 uint32_t intr_status; 995 uint32_t status; 996 unsigned long flags = 0; 997 uint8_t reqs_count = 0; 998 999 if (unlikely(pci_channel_offline(ha->pdev))) 1000 return IRQ_HANDLED; 1001 1002 ha->isr_count++; 1003 status = qla4_82xx_rd_32(ha, ISR_INT_VECTOR); 1004 if (!(status & ha->nx_legacy_intr.int_vec_bit)) 1005 return IRQ_NONE; 1006 1007 status = qla4_82xx_rd_32(ha, ISR_INT_STATE_REG); 1008 if (!ISR_IS_LEGACY_INTR_TRIGGERED(status)) { 1009 DEBUG2(ql4_printk(KERN_INFO, ha, 1010 "%s legacy Int not triggered\n", __func__)); 1011 return IRQ_NONE; 1012 } 1013 1014 /* clear the interrupt */ 1015 qla4_82xx_wr_32(ha, ha->nx_legacy_intr.tgt_status_reg, 0xffffffff); 1016 1017 /* read twice to ensure write is flushed */ 1018 qla4_82xx_rd_32(ha, ISR_INT_VECTOR); 1019 qla4_82xx_rd_32(ha, ISR_INT_VECTOR); 1020 1021 spin_lock_irqsave(&ha->hardware_lock, flags); 1022 while (1) { 1023 if (!(readl(&ha->qla4_82xx_reg->host_int) & 1024 ISRX_82XX_RISC_INT)) { 1025 qla4_82xx_spurious_interrupt(ha, reqs_count); 1026 break; 1027 } 1028 intr_status = readl(&ha->qla4_82xx_reg->host_status); 1029 if ((intr_status & 1030 (HSRX_RISC_MB_INT | HSRX_RISC_IOCB_INT)) == 0) { 1031 qla4_82xx_spurious_interrupt(ha, reqs_count); 1032 break; 1033 } 1034 1035 ha->isp_ops->interrupt_service_routine(ha, intr_status); 1036 1037 /* Enable Interrupt */ 1038 qla4_82xx_wr_32(ha, ha->nx_legacy_intr.tgt_mask_reg, 0xfbff); 1039 1040 if (++reqs_count == MAX_REQS_SERVICED_PER_INTR) 1041 break; 1042 } 1043 1044 spin_unlock_irqrestore(&ha->hardware_lock, flags); 1045 return IRQ_HANDLED; 1046} 1047 1048irqreturn_t 1049qla4_8xxx_msi_handler(int irq, void *dev_id) 1050{ 1051 struct scsi_qla_host *ha; 1052 1053 ha = (struct scsi_qla_host *) dev_id; 1054 if (!ha) { 1055 DEBUG2(printk(KERN_INFO 1056 "qla4xxx: MSIX: Interrupt with NULL host ptr\n")); 1057 return IRQ_NONE; 1058 } 1059 1060 ha->isr_count++; 1061 /* clear the interrupt */ 1062 qla4_82xx_wr_32(ha, ha->nx_legacy_intr.tgt_status_reg, 0xffffffff); 1063 1064 /* read twice to ensure write is flushed */ 1065 qla4_82xx_rd_32(ha, ISR_INT_VECTOR); 1066 qla4_82xx_rd_32(ha, ISR_INT_VECTOR); 1067 1068 return qla4_8xxx_default_intr_handler(irq, dev_id); 1069} 1070 1071/** 1072 * qla4_8xxx_default_intr_handler - hardware interrupt handler. 1073 * @irq: Unused 1074 * @dev_id: Pointer to host adapter structure 1075 * 1076 * This interrupt handler is called directly for MSI-X, and 1077 * called indirectly for MSI. 1078 **/ 1079irqreturn_t 1080qla4_8xxx_default_intr_handler(int irq, void *dev_id) 1081{ 1082 struct scsi_qla_host *ha = dev_id; 1083 unsigned long flags; 1084 uint32_t intr_status; 1085 uint8_t reqs_count = 0; 1086 1087 spin_lock_irqsave(&ha->hardware_lock, flags); 1088 while (1) { 1089 if (!(readl(&ha->qla4_82xx_reg->host_int) & 1090 ISRX_82XX_RISC_INT)) { 1091 qla4_82xx_spurious_interrupt(ha, reqs_count); 1092 break; 1093 } 1094 1095 intr_status = readl(&ha->qla4_82xx_reg->host_status); 1096 if ((intr_status & 1097 (HSRX_RISC_MB_INT | HSRX_RISC_IOCB_INT)) == 0) { 1098 qla4_82xx_spurious_interrupt(ha, reqs_count); 1099 break; 1100 } 1101 1102 ha->isp_ops->interrupt_service_routine(ha, intr_status); 1103 1104 if (++reqs_count == MAX_REQS_SERVICED_PER_INTR) 1105 break; 1106 } 1107 1108 ha->isr_count++; 1109 spin_unlock_irqrestore(&ha->hardware_lock, flags); 1110 return IRQ_HANDLED; 1111} 1112 1113irqreturn_t 1114qla4_8xxx_msix_rsp_q(int irq, void *dev_id) 1115{ 1116 struct scsi_qla_host *ha = dev_id; 1117 unsigned long flags; 1118 1119 spin_lock_irqsave(&ha->hardware_lock, flags); 1120 qla4xxx_process_response_queue(ha); 1121 writel(0, &ha->qla4_82xx_reg->host_int); 1122 spin_unlock_irqrestore(&ha->hardware_lock, flags); 1123 1124 ha->isr_count++; 1125 return IRQ_HANDLED; 1126} 1127 1128/** 1129 * qla4xxx_process_aen - processes AENs generated by firmware 1130 * @ha: pointer to host adapter structure. 1131 * @process_aen: type of AENs to process 1132 * 1133 * Processes specific types of Asynchronous Events generated by firmware. 1134 * The type of AENs to process is specified by process_aen and can be 1135 * PROCESS_ALL_AENS 0 1136 * FLUSH_DDB_CHANGED_AENS 1 1137 * RELOGIN_DDB_CHANGED_AENS 2 1138 **/ 1139void qla4xxx_process_aen(struct scsi_qla_host * ha, uint8_t process_aen) 1140{ 1141 uint32_t mbox_sts[MBOX_AEN_REG_COUNT]; 1142 struct aen *aen; 1143 int i; 1144 unsigned long flags; 1145 1146 spin_lock_irqsave(&ha->hardware_lock, flags); 1147 while (ha->aen_out != ha->aen_in) { 1148 aen = &ha->aen_q[ha->aen_out]; 1149 /* copy aen information to local structure */ 1150 for (i = 0; i < MBOX_AEN_REG_COUNT; i++) 1151 mbox_sts[i] = aen->mbox_sts[i]; 1152 1153 ha->aen_q_count++; 1154 ha->aen_out++; 1155 1156 if (ha->aen_out == MAX_AEN_ENTRIES) 1157 ha->aen_out = 0; 1158 1159 spin_unlock_irqrestore(&ha->hardware_lock, flags); 1160 1161 DEBUG2(printk("qla4xxx(%ld): AEN[%d]=0x%08x, mbx1=0x%08x mbx2=0x%08x" 1162 " mbx3=0x%08x mbx4=0x%08x\n", ha->host_no, 1163 (ha->aen_out ? (ha->aen_out-1): (MAX_AEN_ENTRIES-1)), 1164 mbox_sts[0], mbox_sts[1], mbox_sts[2], 1165 mbox_sts[3], mbox_sts[4])); 1166 1167 switch (mbox_sts[0]) { 1168 case MBOX_ASTS_DATABASE_CHANGED: 1169 switch (process_aen) { 1170 case FLUSH_DDB_CHANGED_AENS: 1171 DEBUG2(printk("scsi%ld: AEN[%d] %04x, index " 1172 "[%d] state=%04x FLUSHED!\n", 1173 ha->host_no, ha->aen_out, 1174 mbox_sts[0], mbox_sts[2], 1175 mbox_sts[3])); 1176 break; 1177 case PROCESS_ALL_AENS: 1178 default: 1179 /* Specific device. */ 1180 if (mbox_sts[1] == 1) 1181 qla4xxx_process_ddb_changed(ha, 1182 mbox_sts[2], mbox_sts[3], 1183 mbox_sts[4]); 1184 break; 1185 } 1186 } 1187 spin_lock_irqsave(&ha->hardware_lock, flags); 1188 } 1189 spin_unlock_irqrestore(&ha->hardware_lock, flags); 1190} 1191 1192int qla4xxx_request_irqs(struct scsi_qla_host *ha) 1193{ 1194 int ret; 1195 1196 if (!is_qla8022(ha)) 1197 goto try_intx; 1198 1199 if (ql4xenablemsix == 2) 1200 goto try_msi; 1201 1202 if (ql4xenablemsix == 0 || ql4xenablemsix != 1) 1203 goto try_intx; 1204 1205 /* Trying MSI-X */ 1206 ret = qla4_8xxx_enable_msix(ha); 1207 if (!ret) { 1208 DEBUG2(ql4_printk(KERN_INFO, ha, 1209 "MSI-X: Enabled (0x%X).\n", ha->revision_id)); 1210 goto irq_attached; 1211 } 1212 1213 ql4_printk(KERN_WARNING, ha, 1214 "MSI-X: Falling back-to MSI mode -- %d.\n", ret); 1215 1216try_msi: 1217 /* Trying MSI */ 1218 ret = pci_enable_msi(ha->pdev); 1219 if (!ret) { 1220 ret = request_irq(ha->pdev->irq, qla4_8xxx_msi_handler, 1221 0, DRIVER_NAME, ha); 1222 if (!ret) { 1223 DEBUG2(ql4_printk(KERN_INFO, ha, "MSI: Enabled.\n")); 1224 set_bit(AF_MSI_ENABLED, &ha->flags); 1225 goto irq_attached; 1226 } else { 1227 ql4_printk(KERN_WARNING, ha, 1228 "MSI: Failed to reserve interrupt %d " 1229 "already in use.\n", ha->pdev->irq); 1230 pci_disable_msi(ha->pdev); 1231 } 1232 } 1233 ql4_printk(KERN_WARNING, ha, 1234 "MSI: Falling back-to INTx mode -- %d.\n", ret); 1235 1236try_intx: 1237 /* Trying INTx */ 1238 ret = request_irq(ha->pdev->irq, ha->isp_ops->intr_handler, 1239 IRQF_SHARED, DRIVER_NAME, ha); 1240 if (!ret) { 1241 DEBUG2(ql4_printk(KERN_INFO, ha, "INTx: Enabled.\n")); 1242 set_bit(AF_INTx_ENABLED, &ha->flags); 1243 goto irq_attached; 1244 1245 } else { 1246 ql4_printk(KERN_WARNING, ha, 1247 "INTx: Failed to reserve interrupt %d already in" 1248 " use.\n", ha->pdev->irq); 1249 return ret; 1250 } 1251 1252irq_attached: 1253 set_bit(AF_IRQ_ATTACHED, &ha->flags); 1254 ha->host->irq = ha->pdev->irq; 1255 ql4_printk(KERN_INFO, ha, "%s: irq %d attached\n", 1256 __func__, ha->pdev->irq); 1257 return ret; 1258} 1259 1260void qla4xxx_free_irqs(struct scsi_qla_host *ha) 1261{ 1262 if (test_bit(AF_MSIX_ENABLED, &ha->flags)) 1263 qla4_8xxx_disable_msix(ha); 1264 else if (test_and_clear_bit(AF_MSI_ENABLED, &ha->flags)) { 1265 free_irq(ha->pdev->irq, ha); 1266 pci_disable_msi(ha->pdev); 1267 } else if (test_and_clear_bit(AF_INTx_ENABLED, &ha->flags)) 1268 free_irq(ha->pdev->irq, ha); 1269} 1270