ql4_isr.c revision 33338e31839fe45fa794bcc227d292dd7fab786c
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 **/ 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_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 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 * qla4_83xx_loopback_in_progress: Is loopback in progress? 586 * @ha: Pointer to host adapter structure. 587 * @ret: 1 = loopback in progress, 0 = loopback not in progress 588 **/ 589static int qla4_83xx_loopback_in_progress(struct scsi_qla_host *ha) 590{ 591 int rval = 1; 592 593 if (is_qla8032(ha)) { 594 if ((ha->idc_info.info2 & ENABLE_INTERNAL_LOOPBACK) || 595 (ha->idc_info.info2 & ENABLE_EXTERNAL_LOOPBACK)) { 596 DEBUG2(ql4_printk(KERN_INFO, ha, 597 "%s: Loopback diagnostics in progress\n", 598 __func__)); 599 rval = 1; 600 } else { 601 DEBUG2(ql4_printk(KERN_INFO, ha, 602 "%s: Loopback diagnostics not in progress\n", 603 __func__)); 604 rval = 0; 605 } 606 } 607 608 return rval; 609} 610 611/** 612 * qla4xxx_isr_decode_mailbox - decodes mailbox status 613 * @ha: Pointer to host adapter structure. 614 * @mailbox_status: Mailbox status. 615 * 616 * This routine decodes the mailbox status during the ISR. 617 * Hardware_lock locked upon entry. runs in interrupt context. 618 **/ 619static void qla4xxx_isr_decode_mailbox(struct scsi_qla_host * ha, 620 uint32_t mbox_status) 621{ 622 int i; 623 uint32_t mbox_sts[MBOX_AEN_REG_COUNT]; 624 __le32 __iomem *mailbox_out; 625 626 if (is_qla8032(ha)) 627 mailbox_out = &ha->qla4_83xx_reg->mailbox_out[0]; 628 else if (is_qla8022(ha)) 629 mailbox_out = &ha->qla4_82xx_reg->mailbox_out[0]; 630 else 631 mailbox_out = &ha->reg->mailbox[0]; 632 633 if ((mbox_status == MBOX_STS_BUSY) || 634 (mbox_status == MBOX_STS_INTERMEDIATE_COMPLETION) || 635 (mbox_status >> 12 == MBOX_COMPLETION_STATUS)) { 636 ha->mbox_status[0] = mbox_status; 637 638 if (test_bit(AF_MBOX_COMMAND, &ha->flags)) { 639 /* 640 * Copy all mailbox registers to a temporary 641 * location and set mailbox command done flag 642 */ 643 for (i = 0; i < ha->mbox_status_count; i++) 644 ha->mbox_status[i] = readl(&mailbox_out[i]); 645 646 set_bit(AF_MBOX_COMMAND_DONE, &ha->flags); 647 648 if (test_bit(AF_MBOX_COMMAND_NOPOLL, &ha->flags)) 649 complete(&ha->mbx_intr_comp); 650 } 651 } else if (mbox_status >> 12 == MBOX_ASYNC_EVENT_STATUS) { 652 for (i = 0; i < MBOX_AEN_REG_COUNT; i++) 653 mbox_sts[i] = readl(&mailbox_out[i]); 654 655 /* Immediately process the AENs that don't require much work. 656 * Only queue the database_changed AENs */ 657 if (ha->aen_log.count < MAX_AEN_ENTRIES) { 658 for (i = 0; i < MBOX_AEN_REG_COUNT; i++) 659 ha->aen_log.entry[ha->aen_log.count].mbox_sts[i] = 660 mbox_sts[i]; 661 ha->aen_log.count++; 662 } 663 switch (mbox_status) { 664 case MBOX_ASTS_SYSTEM_ERROR: 665 /* Log Mailbox registers */ 666 ql4_printk(KERN_INFO, ha, "%s: System Err\n", __func__); 667 qla4xxx_dump_registers(ha); 668 669 if ((is_qla8022(ha) && ql4xdontresethba) || 670 (is_qla8032(ha) && qla4_83xx_idc_dontreset(ha))) { 671 DEBUG2(printk("scsi%ld: %s:Don't Reset HBA\n", 672 ha->host_no, __func__)); 673 } else { 674 set_bit(AF_GET_CRASH_RECORD, &ha->flags); 675 set_bit(DPC_RESET_HA, &ha->dpc_flags); 676 } 677 break; 678 679 case MBOX_ASTS_REQUEST_TRANSFER_ERROR: 680 case MBOX_ASTS_RESPONSE_TRANSFER_ERROR: 681 case MBOX_ASTS_NVRAM_INVALID: 682 case MBOX_ASTS_IP_ADDRESS_CHANGED: 683 case MBOX_ASTS_DHCP_LEASE_EXPIRED: 684 DEBUG2(printk("scsi%ld: AEN %04x, ERROR Status, " 685 "Reset HA\n", ha->host_no, mbox_status)); 686 if (is_qla80XX(ha)) 687 set_bit(DPC_RESET_HA_FW_CONTEXT, 688 &ha->dpc_flags); 689 else 690 set_bit(DPC_RESET_HA, &ha->dpc_flags); 691 break; 692 693 case MBOX_ASTS_LINK_UP: 694 set_bit(AF_LINK_UP, &ha->flags); 695 if (test_bit(AF_INIT_DONE, &ha->flags)) 696 set_bit(DPC_LINK_CHANGED, &ha->dpc_flags); 697 698 ql4_printk(KERN_INFO, ha, "%s: LINK UP\n", __func__); 699 qla4xxx_post_aen_work(ha, ISCSI_EVENT_LINKUP, 700 sizeof(mbox_sts), 701 (uint8_t *) mbox_sts); 702 break; 703 704 case MBOX_ASTS_LINK_DOWN: 705 clear_bit(AF_LINK_UP, &ha->flags); 706 if (test_bit(AF_INIT_DONE, &ha->flags)) { 707 set_bit(DPC_LINK_CHANGED, &ha->dpc_flags); 708 qla4xxx_wake_dpc(ha); 709 } 710 711 ql4_printk(KERN_INFO, ha, "%s: LINK DOWN\n", __func__); 712 qla4xxx_post_aen_work(ha, ISCSI_EVENT_LINKDOWN, 713 sizeof(mbox_sts), 714 (uint8_t *) mbox_sts); 715 break; 716 717 case MBOX_ASTS_HEARTBEAT: 718 ha->seconds_since_last_heartbeat = 0; 719 break; 720 721 case MBOX_ASTS_DHCP_LEASE_ACQUIRED: 722 DEBUG2(printk("scsi%ld: AEN %04x DHCP LEASE " 723 "ACQUIRED\n", ha->host_no, mbox_status)); 724 set_bit(DPC_GET_DHCP_IP_ADDR, &ha->dpc_flags); 725 break; 726 727 case MBOX_ASTS_PROTOCOL_STATISTIC_ALARM: 728 case MBOX_ASTS_SCSI_COMMAND_PDU_REJECTED: /* Target 729 * mode 730 * only */ 731 case MBOX_ASTS_UNSOLICITED_PDU_RECEIVED: /* Connection mode */ 732 case MBOX_ASTS_IPSEC_SYSTEM_FATAL_ERROR: 733 case MBOX_ASTS_SUBNET_STATE_CHANGE: 734 case MBOX_ASTS_DUPLICATE_IP: 735 /* No action */ 736 DEBUG2(printk("scsi%ld: AEN %04x\n", ha->host_no, 737 mbox_status)); 738 break; 739 740 case MBOX_ASTS_IP_ADDR_STATE_CHANGED: 741 printk("scsi%ld: AEN %04x, mbox_sts[2]=%04x, " 742 "mbox_sts[3]=%04x\n", ha->host_no, mbox_sts[0], 743 mbox_sts[2], mbox_sts[3]); 744 745 /* mbox_sts[2] = Old ACB state 746 * mbox_sts[3] = new ACB state */ 747 if ((mbox_sts[3] == ACB_STATE_VALID) && 748 ((mbox_sts[2] == ACB_STATE_TENTATIVE) || 749 (mbox_sts[2] == ACB_STATE_ACQUIRING))) 750 set_bit(DPC_GET_DHCP_IP_ADDR, &ha->dpc_flags); 751 else if ((mbox_sts[3] == ACB_STATE_ACQUIRING) && 752 (mbox_sts[2] == ACB_STATE_VALID)) { 753 if (is_qla80XX(ha)) 754 set_bit(DPC_RESET_HA_FW_CONTEXT, 755 &ha->dpc_flags); 756 else 757 set_bit(DPC_RESET_HA, &ha->dpc_flags); 758 } else if ((mbox_sts[3] == ACB_STATE_UNCONFIGURED)) 759 complete(&ha->disable_acb_comp); 760 break; 761 762 case MBOX_ASTS_MAC_ADDRESS_CHANGED: 763 case MBOX_ASTS_DNS: 764 /* No action */ 765 DEBUG2(printk(KERN_INFO "scsi%ld: AEN %04x, " 766 "mbox_sts[1]=%04x, mbox_sts[2]=%04x\n", 767 ha->host_no, mbox_sts[0], 768 mbox_sts[1], mbox_sts[2])); 769 break; 770 771 case MBOX_ASTS_SELF_TEST_FAILED: 772 case MBOX_ASTS_LOGIN_FAILED: 773 /* No action */ 774 DEBUG2(printk("scsi%ld: AEN %04x, mbox_sts[1]=%04x, " 775 "mbox_sts[2]=%04x, mbox_sts[3]=%04x\n", 776 ha->host_no, mbox_sts[0], mbox_sts[1], 777 mbox_sts[2], mbox_sts[3])); 778 break; 779 780 case MBOX_ASTS_DATABASE_CHANGED: 781 /* Queue AEN information and process it in the DPC 782 * routine */ 783 if (ha->aen_q_count > 0) { 784 785 /* decrement available counter */ 786 ha->aen_q_count--; 787 788 for (i = 0; i < MBOX_AEN_REG_COUNT; i++) 789 ha->aen_q[ha->aen_in].mbox_sts[i] = 790 mbox_sts[i]; 791 792 /* print debug message */ 793 DEBUG2(printk("scsi%ld: AEN[%d] %04x queued " 794 "mb1:0x%x mb2:0x%x mb3:0x%x " 795 "mb4:0x%x mb5:0x%x\n", 796 ha->host_no, ha->aen_in, 797 mbox_sts[0], mbox_sts[1], 798 mbox_sts[2], mbox_sts[3], 799 mbox_sts[4], mbox_sts[5])); 800 801 /* advance pointer */ 802 ha->aen_in++; 803 if (ha->aen_in == MAX_AEN_ENTRIES) 804 ha->aen_in = 0; 805 806 /* The DPC routine will process the aen */ 807 set_bit(DPC_AEN, &ha->dpc_flags); 808 } else { 809 DEBUG2(printk("scsi%ld: %s: aen %04x, queue " 810 "overflowed! AEN LOST!!\n", 811 ha->host_no, __func__, 812 mbox_sts[0])); 813 814 DEBUG2(printk("scsi%ld: DUMP AEN QUEUE\n", 815 ha->host_no)); 816 817 for (i = 0; i < MAX_AEN_ENTRIES; i++) { 818 DEBUG2(printk("AEN[%d] %04x %04x %04x " 819 "%04x\n", i, mbox_sts[0], 820 mbox_sts[1], mbox_sts[2], 821 mbox_sts[3])); 822 } 823 } 824 break; 825 826 case MBOX_ASTS_TXSCVR_INSERTED: 827 DEBUG2(printk(KERN_WARNING 828 "scsi%ld: AEN %04x Transceiver" 829 " inserted\n", ha->host_no, mbox_sts[0])); 830 break; 831 832 case MBOX_ASTS_TXSCVR_REMOVED: 833 DEBUG2(printk(KERN_WARNING 834 "scsi%ld: AEN %04x Transceiver" 835 " removed\n", ha->host_no, mbox_sts[0])); 836 break; 837 838 case MBOX_ASTS_IDC_REQUEST_NOTIFICATION: 839 { 840 uint32_t opcode; 841 if (is_qla8032(ha)) { 842 DEBUG2(ql4_printk(KERN_INFO, ha, 843 "scsi%ld: AEN %04x, mbox_sts[1]=%08x, mbox_sts[2]=%08x, mbox_sts[3]=%08x, mbox_sts[4]=%08x\n", 844 ha->host_no, mbox_sts[0], 845 mbox_sts[1], mbox_sts[2], 846 mbox_sts[3], mbox_sts[4])); 847 opcode = mbox_sts[1] >> 16; 848 if ((opcode == MBOX_CMD_SET_PORT_CONFIG) || 849 (opcode == MBOX_CMD_PORT_RESET)) { 850 set_bit(DPC_POST_IDC_ACK, 851 &ha->dpc_flags); 852 ha->idc_info.request_desc = mbox_sts[1]; 853 ha->idc_info.info1 = mbox_sts[2]; 854 ha->idc_info.info2 = mbox_sts[3]; 855 ha->idc_info.info3 = mbox_sts[4]; 856 qla4xxx_wake_dpc(ha); 857 } 858 } 859 break; 860 } 861 862 case MBOX_ASTS_IDC_COMPLETE: 863 if (is_qla8032(ha)) { 864 DEBUG2(ql4_printk(KERN_INFO, ha, 865 "scsi%ld: AEN %04x, mbox_sts[1]=%08x, mbox_sts[2]=%08x, mbox_sts[3]=%08x, mbox_sts[4]=%08x\n", 866 ha->host_no, mbox_sts[0], 867 mbox_sts[1], mbox_sts[2], 868 mbox_sts[3], mbox_sts[4])); 869 DEBUG2(ql4_printk(KERN_INFO, ha, 870 "scsi:%ld: AEN %04x IDC Complete notification\n", 871 ha->host_no, mbox_sts[0])); 872 873 if (qla4_83xx_loopback_in_progress(ha)) 874 set_bit(AF_LOOPBACK, &ha->flags); 875 else 876 clear_bit(AF_LOOPBACK, &ha->flags); 877 } 878 break; 879 880 default: 881 DEBUG2(printk(KERN_WARNING 882 "scsi%ld: AEN %04x UNKNOWN\n", 883 ha->host_no, mbox_sts[0])); 884 break; 885 } 886 } else { 887 DEBUG2(printk("scsi%ld: Unknown mailbox status %08X\n", 888 ha->host_no, mbox_status)); 889 890 ha->mbox_status[0] = mbox_status; 891 } 892} 893 894void qla4_83xx_interrupt_service_routine(struct scsi_qla_host *ha, 895 uint32_t intr_status) 896{ 897 /* Process mailbox/asynch event interrupt.*/ 898 if (intr_status) { 899 qla4xxx_isr_decode_mailbox(ha, 900 readl(&ha->qla4_83xx_reg->mailbox_out[0])); 901 /* clear the interrupt */ 902 writel(0, &ha->qla4_83xx_reg->risc_intr); 903 } else { 904 qla4xxx_process_response_queue(ha); 905 } 906 907 /* clear the interrupt */ 908 writel(0, &ha->qla4_83xx_reg->mb_int_mask); 909} 910 911/** 912 * qla4_82xx_interrupt_service_routine - isr 913 * @ha: pointer to host adapter structure. 914 * 915 * This is the main interrupt service routine. 916 * hardware_lock locked upon entry. runs in interrupt context. 917 **/ 918void qla4_82xx_interrupt_service_routine(struct scsi_qla_host *ha, 919 uint32_t intr_status) 920{ 921 /* Process response queue interrupt. */ 922 if (intr_status & HSRX_RISC_IOCB_INT) 923 qla4xxx_process_response_queue(ha); 924 925 /* Process mailbox/asynch event interrupt.*/ 926 if (intr_status & HSRX_RISC_MB_INT) 927 qla4xxx_isr_decode_mailbox(ha, 928 readl(&ha->qla4_82xx_reg->mailbox_out[0])); 929 930 /* clear the interrupt */ 931 writel(0, &ha->qla4_82xx_reg->host_int); 932 readl(&ha->qla4_82xx_reg->host_int); 933} 934 935/** 936 * qla4xxx_interrupt_service_routine - isr 937 * @ha: pointer to host adapter structure. 938 * 939 * This is the main interrupt service routine. 940 * hardware_lock locked upon entry. runs in interrupt context. 941 **/ 942void qla4xxx_interrupt_service_routine(struct scsi_qla_host * ha, 943 uint32_t intr_status) 944{ 945 /* Process response queue interrupt. */ 946 if (intr_status & CSR_SCSI_COMPLETION_INTR) 947 qla4xxx_process_response_queue(ha); 948 949 /* Process mailbox/asynch event interrupt.*/ 950 if (intr_status & CSR_SCSI_PROCESSOR_INTR) { 951 qla4xxx_isr_decode_mailbox(ha, 952 readl(&ha->reg->mailbox[0])); 953 954 /* Clear Mailbox Interrupt */ 955 writel(set_rmask(CSR_SCSI_PROCESSOR_INTR), 956 &ha->reg->ctrl_status); 957 readl(&ha->reg->ctrl_status); 958 } 959} 960 961/** 962 * qla4_82xx_spurious_interrupt - processes spurious interrupt 963 * @ha: pointer to host adapter structure. 964 * @reqs_count: . 965 * 966 **/ 967static void qla4_82xx_spurious_interrupt(struct scsi_qla_host *ha, 968 uint8_t reqs_count) 969{ 970 if (reqs_count) 971 return; 972 973 DEBUG2(ql4_printk(KERN_INFO, ha, "Spurious Interrupt\n")); 974 if (is_qla8022(ha)) { 975 writel(0, &ha->qla4_82xx_reg->host_int); 976 if (test_bit(AF_INTx_ENABLED, &ha->flags)) 977 qla4_82xx_wr_32(ha, ha->nx_legacy_intr.tgt_mask_reg, 978 0xfbff); 979 } 980 ha->spurious_int_count++; 981} 982 983/** 984 * qla4xxx_intr_handler - hardware interrupt handler. 985 * @irq: Unused 986 * @dev_id: Pointer to host adapter structure 987 **/ 988irqreturn_t qla4xxx_intr_handler(int irq, void *dev_id) 989{ 990 struct scsi_qla_host *ha; 991 uint32_t intr_status; 992 unsigned long flags = 0; 993 uint8_t reqs_count = 0; 994 995 ha = (struct scsi_qla_host *) dev_id; 996 if (!ha) { 997 DEBUG2(printk(KERN_INFO 998 "qla4xxx: Interrupt with NULL host ptr\n")); 999 return IRQ_NONE; 1000 } 1001 1002 spin_lock_irqsave(&ha->hardware_lock, flags); 1003 1004 ha->isr_count++; 1005 /* 1006 * Repeatedly service interrupts up to a maximum of 1007 * MAX_REQS_SERVICED_PER_INTR 1008 */ 1009 while (1) { 1010 /* 1011 * Read interrupt status 1012 */ 1013 if (ha->isp_ops->rd_shdw_rsp_q_in(ha) != 1014 ha->response_out) 1015 intr_status = CSR_SCSI_COMPLETION_INTR; 1016 else 1017 intr_status = readl(&ha->reg->ctrl_status); 1018 1019 if ((intr_status & 1020 (CSR_SCSI_RESET_INTR|CSR_FATAL_ERROR|INTR_PENDING)) == 0) { 1021 if (reqs_count == 0) 1022 ha->spurious_int_count++; 1023 break; 1024 } 1025 1026 if (intr_status & CSR_FATAL_ERROR) { 1027 DEBUG2(printk(KERN_INFO "scsi%ld: Fatal Error, " 1028 "Status 0x%04x\n", ha->host_no, 1029 readl(isp_port_error_status (ha)))); 1030 1031 /* Issue Soft Reset to clear this error condition. 1032 * This will prevent the RISC from repeatedly 1033 * interrupting the driver; thus, allowing the DPC to 1034 * get scheduled to continue error recovery. 1035 * NOTE: Disabling RISC interrupts does not work in 1036 * this case, as CSR_FATAL_ERROR overrides 1037 * CSR_SCSI_INTR_ENABLE */ 1038 if ((readl(&ha->reg->ctrl_status) & 1039 CSR_SCSI_RESET_INTR) == 0) { 1040 writel(set_rmask(CSR_SOFT_RESET), 1041 &ha->reg->ctrl_status); 1042 readl(&ha->reg->ctrl_status); 1043 } 1044 1045 writel(set_rmask(CSR_FATAL_ERROR), 1046 &ha->reg->ctrl_status); 1047 readl(&ha->reg->ctrl_status); 1048 1049 __qla4xxx_disable_intrs(ha); 1050 1051 set_bit(DPC_RESET_HA, &ha->dpc_flags); 1052 1053 break; 1054 } else if (intr_status & CSR_SCSI_RESET_INTR) { 1055 clear_bit(AF_ONLINE, &ha->flags); 1056 __qla4xxx_disable_intrs(ha); 1057 1058 writel(set_rmask(CSR_SCSI_RESET_INTR), 1059 &ha->reg->ctrl_status); 1060 readl(&ha->reg->ctrl_status); 1061 1062 if (!test_bit(AF_HA_REMOVAL, &ha->flags)) 1063 set_bit(DPC_RESET_HA_INTR, &ha->dpc_flags); 1064 1065 break; 1066 } else if (intr_status & INTR_PENDING) { 1067 ha->isp_ops->interrupt_service_routine(ha, intr_status); 1068 ha->total_io_count++; 1069 if (++reqs_count == MAX_REQS_SERVICED_PER_INTR) 1070 break; 1071 } 1072 } 1073 1074 spin_unlock_irqrestore(&ha->hardware_lock, flags); 1075 1076 return IRQ_HANDLED; 1077} 1078 1079/** 1080 * qla4_82xx_intr_handler - hardware interrupt handler. 1081 * @irq: Unused 1082 * @dev_id: Pointer to host adapter structure 1083 **/ 1084irqreturn_t qla4_82xx_intr_handler(int irq, void *dev_id) 1085{ 1086 struct scsi_qla_host *ha = dev_id; 1087 uint32_t intr_status; 1088 uint32_t status; 1089 unsigned long flags = 0; 1090 uint8_t reqs_count = 0; 1091 1092 if (unlikely(pci_channel_offline(ha->pdev))) 1093 return IRQ_HANDLED; 1094 1095 ha->isr_count++; 1096 status = qla4_82xx_rd_32(ha, ISR_INT_VECTOR); 1097 if (!(status & ha->nx_legacy_intr.int_vec_bit)) 1098 return IRQ_NONE; 1099 1100 status = qla4_82xx_rd_32(ha, ISR_INT_STATE_REG); 1101 if (!ISR_IS_LEGACY_INTR_TRIGGERED(status)) { 1102 DEBUG7(ql4_printk(KERN_INFO, ha, 1103 "%s legacy Int not triggered\n", __func__)); 1104 return IRQ_NONE; 1105 } 1106 1107 /* clear the interrupt */ 1108 qla4_82xx_wr_32(ha, ha->nx_legacy_intr.tgt_status_reg, 0xffffffff); 1109 1110 /* read twice to ensure write is flushed */ 1111 qla4_82xx_rd_32(ha, ISR_INT_VECTOR); 1112 qla4_82xx_rd_32(ha, ISR_INT_VECTOR); 1113 1114 spin_lock_irqsave(&ha->hardware_lock, flags); 1115 while (1) { 1116 if (!(readl(&ha->qla4_82xx_reg->host_int) & 1117 ISRX_82XX_RISC_INT)) { 1118 qla4_82xx_spurious_interrupt(ha, reqs_count); 1119 break; 1120 } 1121 intr_status = readl(&ha->qla4_82xx_reg->host_status); 1122 if ((intr_status & 1123 (HSRX_RISC_MB_INT | HSRX_RISC_IOCB_INT)) == 0) { 1124 qla4_82xx_spurious_interrupt(ha, reqs_count); 1125 break; 1126 } 1127 1128 ha->isp_ops->interrupt_service_routine(ha, intr_status); 1129 1130 /* Enable Interrupt */ 1131 qla4_82xx_wr_32(ha, ha->nx_legacy_intr.tgt_mask_reg, 0xfbff); 1132 1133 if (++reqs_count == MAX_REQS_SERVICED_PER_INTR) 1134 break; 1135 } 1136 1137 spin_unlock_irqrestore(&ha->hardware_lock, flags); 1138 return IRQ_HANDLED; 1139} 1140 1141#define LEG_INT_PTR_B31 (1 << 31) 1142#define LEG_INT_PTR_B30 (1 << 30) 1143#define PF_BITS_MASK (0xF << 16) 1144 1145/** 1146 * qla4_83xx_intr_handler - hardware interrupt handler. 1147 * @irq: Unused 1148 * @dev_id: Pointer to host adapter structure 1149 **/ 1150irqreturn_t qla4_83xx_intr_handler(int irq, void *dev_id) 1151{ 1152 struct scsi_qla_host *ha = dev_id; 1153 uint32_t leg_int_ptr = 0; 1154 unsigned long flags = 0; 1155 1156 ha->isr_count++; 1157 leg_int_ptr = readl(&ha->qla4_83xx_reg->leg_int_ptr); 1158 1159 /* Legacy interrupt is valid if bit31 of leg_int_ptr is set */ 1160 if (!(leg_int_ptr & LEG_INT_PTR_B31)) { 1161 DEBUG7(ql4_printk(KERN_ERR, ha, 1162 "%s: Legacy Interrupt Bit 31 not set, spurious interrupt!\n", 1163 __func__)); 1164 return IRQ_NONE; 1165 } 1166 1167 /* Validate the PCIE function ID set in leg_int_ptr bits [19..16] */ 1168 if ((leg_int_ptr & PF_BITS_MASK) != ha->pf_bit) { 1169 DEBUG7(ql4_printk(KERN_ERR, ha, 1170 "%s: Incorrect function ID 0x%x in legacy interrupt register, ha->pf_bit = 0x%x\n", 1171 __func__, (leg_int_ptr & PF_BITS_MASK), 1172 ha->pf_bit)); 1173 return IRQ_NONE; 1174 } 1175 1176 /* To de-assert legacy interrupt, write 0 to Legacy Interrupt Trigger 1177 * Control register and poll till Legacy Interrupt Pointer register 1178 * bit30 is 0. 1179 */ 1180 writel(0, &ha->qla4_83xx_reg->leg_int_trig); 1181 do { 1182 leg_int_ptr = readl(&ha->qla4_83xx_reg->leg_int_ptr); 1183 if ((leg_int_ptr & PF_BITS_MASK) != ha->pf_bit) 1184 break; 1185 } while (leg_int_ptr & LEG_INT_PTR_B30); 1186 1187 spin_lock_irqsave(&ha->hardware_lock, flags); 1188 leg_int_ptr = readl(&ha->qla4_83xx_reg->risc_intr); 1189 ha->isp_ops->interrupt_service_routine(ha, leg_int_ptr); 1190 spin_unlock_irqrestore(&ha->hardware_lock, flags); 1191 1192 return IRQ_HANDLED; 1193} 1194 1195irqreturn_t 1196qla4_8xxx_msi_handler(int irq, void *dev_id) 1197{ 1198 struct scsi_qla_host *ha; 1199 1200 ha = (struct scsi_qla_host *) dev_id; 1201 if (!ha) { 1202 DEBUG2(printk(KERN_INFO 1203 "qla4xxx: MSIX: Interrupt with NULL host ptr\n")); 1204 return IRQ_NONE; 1205 } 1206 1207 ha->isr_count++; 1208 /* clear the interrupt */ 1209 qla4_82xx_wr_32(ha, ha->nx_legacy_intr.tgt_status_reg, 0xffffffff); 1210 1211 /* read twice to ensure write is flushed */ 1212 qla4_82xx_rd_32(ha, ISR_INT_VECTOR); 1213 qla4_82xx_rd_32(ha, ISR_INT_VECTOR); 1214 1215 return qla4_8xxx_default_intr_handler(irq, dev_id); 1216} 1217 1218static irqreturn_t qla4_83xx_mailbox_intr_handler(int irq, void *dev_id) 1219{ 1220 struct scsi_qla_host *ha = dev_id; 1221 unsigned long flags; 1222 uint32_t ival = 0; 1223 1224 spin_lock_irqsave(&ha->hardware_lock, flags); 1225 1226 ival = readl(&ha->qla4_83xx_reg->risc_intr); 1227 if (ival == 0) { 1228 ql4_printk(KERN_INFO, ha, 1229 "%s: It is a spurious mailbox interrupt!\n", 1230 __func__); 1231 ival = readl(&ha->qla4_83xx_reg->mb_int_mask); 1232 ival &= ~INT_MASK_FW_MB; 1233 writel(ival, &ha->qla4_83xx_reg->mb_int_mask); 1234 goto exit; 1235 } 1236 1237 qla4xxx_isr_decode_mailbox(ha, 1238 readl(&ha->qla4_83xx_reg->mailbox_out[0])); 1239 writel(0, &ha->qla4_83xx_reg->risc_intr); 1240 ival = readl(&ha->qla4_83xx_reg->mb_int_mask); 1241 ival &= ~INT_MASK_FW_MB; 1242 writel(ival, &ha->qla4_83xx_reg->mb_int_mask); 1243 ha->isr_count++; 1244exit: 1245 spin_unlock_irqrestore(&ha->hardware_lock, flags); 1246 return IRQ_HANDLED; 1247} 1248 1249/** 1250 * qla4_8xxx_default_intr_handler - hardware interrupt handler. 1251 * @irq: Unused 1252 * @dev_id: Pointer to host adapter structure 1253 * 1254 * This interrupt handler is called directly for MSI-X, and 1255 * called indirectly for MSI. 1256 **/ 1257irqreturn_t 1258qla4_8xxx_default_intr_handler(int irq, void *dev_id) 1259{ 1260 struct scsi_qla_host *ha = dev_id; 1261 unsigned long flags; 1262 uint32_t intr_status; 1263 uint8_t reqs_count = 0; 1264 1265 if (is_qla8032(ha)) { 1266 qla4_83xx_mailbox_intr_handler(irq, dev_id); 1267 } else { 1268 spin_lock_irqsave(&ha->hardware_lock, flags); 1269 while (1) { 1270 if (!(readl(&ha->qla4_82xx_reg->host_int) & 1271 ISRX_82XX_RISC_INT)) { 1272 qla4_82xx_spurious_interrupt(ha, reqs_count); 1273 break; 1274 } 1275 1276 intr_status = readl(&ha->qla4_82xx_reg->host_status); 1277 if ((intr_status & 1278 (HSRX_RISC_MB_INT | HSRX_RISC_IOCB_INT)) == 0) { 1279 qla4_82xx_spurious_interrupt(ha, reqs_count); 1280 break; 1281 } 1282 1283 ha->isp_ops->interrupt_service_routine(ha, intr_status); 1284 1285 if (++reqs_count == MAX_REQS_SERVICED_PER_INTR) 1286 break; 1287 } 1288 ha->isr_count++; 1289 spin_unlock_irqrestore(&ha->hardware_lock, flags); 1290 } 1291 return IRQ_HANDLED; 1292} 1293 1294irqreturn_t 1295qla4_8xxx_msix_rsp_q(int irq, void *dev_id) 1296{ 1297 struct scsi_qla_host *ha = dev_id; 1298 unsigned long flags; 1299 uint32_t ival = 0; 1300 1301 spin_lock_irqsave(&ha->hardware_lock, flags); 1302 if (is_qla8032(ha)) { 1303 ival = readl(&ha->qla4_83xx_reg->iocb_int_mask); 1304 if (ival == 0) { 1305 ql4_printk(KERN_INFO, ha, "%s: It is a spurious iocb interrupt!\n", 1306 __func__); 1307 goto exit_msix_rsp_q; 1308 } 1309 qla4xxx_process_response_queue(ha); 1310 writel(0, &ha->qla4_83xx_reg->iocb_int_mask); 1311 } else { 1312 qla4xxx_process_response_queue(ha); 1313 writel(0, &ha->qla4_82xx_reg->host_int); 1314 } 1315 ha->isr_count++; 1316exit_msix_rsp_q: 1317 spin_unlock_irqrestore(&ha->hardware_lock, flags); 1318 return IRQ_HANDLED; 1319} 1320 1321/** 1322 * qla4xxx_process_aen - processes AENs generated by firmware 1323 * @ha: pointer to host adapter structure. 1324 * @process_aen: type of AENs to process 1325 * 1326 * Processes specific types of Asynchronous Events generated by firmware. 1327 * The type of AENs to process is specified by process_aen and can be 1328 * PROCESS_ALL_AENS 0 1329 * FLUSH_DDB_CHANGED_AENS 1 1330 * RELOGIN_DDB_CHANGED_AENS 2 1331 **/ 1332void qla4xxx_process_aen(struct scsi_qla_host * ha, uint8_t process_aen) 1333{ 1334 uint32_t mbox_sts[MBOX_AEN_REG_COUNT]; 1335 struct aen *aen; 1336 int i; 1337 unsigned long flags; 1338 1339 spin_lock_irqsave(&ha->hardware_lock, flags); 1340 while (ha->aen_out != ha->aen_in) { 1341 aen = &ha->aen_q[ha->aen_out]; 1342 /* copy aen information to local structure */ 1343 for (i = 0; i < MBOX_AEN_REG_COUNT; i++) 1344 mbox_sts[i] = aen->mbox_sts[i]; 1345 1346 ha->aen_q_count++; 1347 ha->aen_out++; 1348 1349 if (ha->aen_out == MAX_AEN_ENTRIES) 1350 ha->aen_out = 0; 1351 1352 spin_unlock_irqrestore(&ha->hardware_lock, flags); 1353 1354 DEBUG2(printk("qla4xxx(%ld): AEN[%d]=0x%08x, mbx1=0x%08x mbx2=0x%08x" 1355 " mbx3=0x%08x mbx4=0x%08x\n", ha->host_no, 1356 (ha->aen_out ? (ha->aen_out-1): (MAX_AEN_ENTRIES-1)), 1357 mbox_sts[0], mbox_sts[1], mbox_sts[2], 1358 mbox_sts[3], mbox_sts[4])); 1359 1360 switch (mbox_sts[0]) { 1361 case MBOX_ASTS_DATABASE_CHANGED: 1362 switch (process_aen) { 1363 case FLUSH_DDB_CHANGED_AENS: 1364 DEBUG2(printk("scsi%ld: AEN[%d] %04x, index " 1365 "[%d] state=%04x FLUSHED!\n", 1366 ha->host_no, ha->aen_out, 1367 mbox_sts[0], mbox_sts[2], 1368 mbox_sts[3])); 1369 break; 1370 case PROCESS_ALL_AENS: 1371 default: 1372 /* Specific device. */ 1373 if (mbox_sts[1] == 1) 1374 qla4xxx_process_ddb_changed(ha, 1375 mbox_sts[2], mbox_sts[3], 1376 mbox_sts[4]); 1377 break; 1378 } 1379 } 1380 spin_lock_irqsave(&ha->hardware_lock, flags); 1381 } 1382 spin_unlock_irqrestore(&ha->hardware_lock, flags); 1383} 1384 1385int qla4xxx_request_irqs(struct scsi_qla_host *ha) 1386{ 1387 int ret; 1388 1389 if (is_qla40XX(ha)) 1390 goto try_intx; 1391 1392 if (ql4xenablemsix == 2) { 1393 /* Note: MSI Interrupts not supported for ISP8324 */ 1394 if (is_qla8032(ha)) { 1395 ql4_printk(KERN_INFO, ha, "%s: MSI Interrupts not supported for ISP8324, Falling back-to INTx mode\n", 1396 __func__); 1397 goto try_intx; 1398 } 1399 goto try_msi; 1400 } 1401 1402 if (ql4xenablemsix == 0 || ql4xenablemsix != 1) 1403 goto try_intx; 1404 1405 /* Trying MSI-X */ 1406 ret = qla4_8xxx_enable_msix(ha); 1407 if (!ret) { 1408 DEBUG2(ql4_printk(KERN_INFO, ha, 1409 "MSI-X: Enabled (0x%X).\n", ha->revision_id)); 1410 goto irq_attached; 1411 } else { 1412 if (is_qla8032(ha)) { 1413 ql4_printk(KERN_INFO, ha, "%s: ISP8324: MSI-X: Falling back-to INTx mode. ret = %d\n", 1414 __func__, ret); 1415 goto try_intx; 1416 } 1417 } 1418 1419 ql4_printk(KERN_WARNING, ha, 1420 "MSI-X: Falling back-to MSI mode -- %d.\n", ret); 1421 1422try_msi: 1423 /* Trying MSI */ 1424 ret = pci_enable_msi(ha->pdev); 1425 if (!ret) { 1426 ret = request_irq(ha->pdev->irq, qla4_8xxx_msi_handler, 1427 0, DRIVER_NAME, ha); 1428 if (!ret) { 1429 DEBUG2(ql4_printk(KERN_INFO, ha, "MSI: Enabled.\n")); 1430 set_bit(AF_MSI_ENABLED, &ha->flags); 1431 goto irq_attached; 1432 } else { 1433 ql4_printk(KERN_WARNING, ha, 1434 "MSI: Failed to reserve interrupt %d " 1435 "already in use.\n", ha->pdev->irq); 1436 pci_disable_msi(ha->pdev); 1437 } 1438 } 1439 1440 /* 1441 * Prevent interrupts from falling back to INTx mode in cases where 1442 * interrupts cannot get acquired through MSI-X or MSI mode. 1443 */ 1444 if (is_qla8022(ha)) { 1445 ql4_printk(KERN_WARNING, ha, "IRQ not attached -- %d.\n", ret); 1446 goto irq_not_attached; 1447 } 1448try_intx: 1449 /* Trying INTx */ 1450 ret = request_irq(ha->pdev->irq, ha->isp_ops->intr_handler, 1451 IRQF_SHARED, DRIVER_NAME, ha); 1452 if (!ret) { 1453 DEBUG2(ql4_printk(KERN_INFO, ha, "INTx: Enabled.\n")); 1454 set_bit(AF_INTx_ENABLED, &ha->flags); 1455 goto irq_attached; 1456 1457 } else { 1458 ql4_printk(KERN_WARNING, ha, 1459 "INTx: Failed to reserve interrupt %d already in" 1460 " use.\n", ha->pdev->irq); 1461 goto irq_not_attached; 1462 } 1463 1464irq_attached: 1465 set_bit(AF_IRQ_ATTACHED, &ha->flags); 1466 ha->host->irq = ha->pdev->irq; 1467 ql4_printk(KERN_INFO, ha, "%s: irq %d attached\n", 1468 __func__, ha->pdev->irq); 1469irq_not_attached: 1470 return ret; 1471} 1472 1473void qla4xxx_free_irqs(struct scsi_qla_host *ha) 1474{ 1475 if (test_and_clear_bit(AF_IRQ_ATTACHED, &ha->flags)) { 1476 if (test_bit(AF_MSIX_ENABLED, &ha->flags)) { 1477 qla4_8xxx_disable_msix(ha); 1478 } else if (test_and_clear_bit(AF_MSI_ENABLED, &ha->flags)) { 1479 free_irq(ha->pdev->irq, ha); 1480 pci_disable_msi(ha->pdev); 1481 } else if (test_and_clear_bit(AF_INTx_ENABLED, &ha->flags)) { 1482 free_irq(ha->pdev->irq, ha); 1483 } 1484 } 1485} 1486