1 /* 2 * QLogic iSCSI HBA Driver 3 * Copyright (c) 2003-2010 QLogic Corporation 4 * 5 * See LICENSE.qla4xxx for copyright and licensing details. 6 */ 7 8 #include "ql4_def.h" 9 #include "ql4_glbl.h" 10 #include "ql4_dbg.h" 11 #include "ql4_inline.h" 12 13 /** 14 * qla4xxx_copy_sense - copy sense data into cmd sense buffer 15 * @ha: Pointer to host adapter structure. 16 * @sts_entry: Pointer to status entry structure. 17 * @srb: Pointer to srb structure. 18 **/ 19 static void qla4xxx_copy_sense(struct scsi_qla_host *ha, 20 struct status_entry *sts_entry, 21 struct srb *srb) 22 { 23 struct scsi_cmnd *cmd = srb->cmd; 24 uint16_t sense_len; 25 26 memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE); 27 sense_len = le16_to_cpu(sts_entry->senseDataByteCnt); 28 if (sense_len == 0) 29 return; 30 31 /* Save total available sense length, 32 * not to exceed cmd's sense buffer size */ 33 sense_len = min_t(uint16_t, sense_len, SCSI_SENSE_BUFFERSIZE); 34 srb->req_sense_ptr = cmd->sense_buffer; 35 srb->req_sense_len = sense_len; 36 37 /* Copy sense from sts_entry pkt */ 38 sense_len = min_t(uint16_t, sense_len, IOCB_MAX_SENSEDATA_LEN); 39 memcpy(cmd->sense_buffer, sts_entry->senseData, sense_len); 40 41 DEBUG2(printk(KERN_INFO "scsi%ld:%d:%d:%d: %s: sense key = %x, " 42 "ASL= %02x, ASC/ASCQ = %02x/%02x\n", ha->host_no, 43 cmd->device->channel, cmd->device->id, 44 cmd->device->lun, __func__, 45 sts_entry->senseData[2] & 0x0f, 46 sts_entry->senseData[7], 47 sts_entry->senseData[12], 48 sts_entry->senseData[13])); 49 50 DEBUG5(qla4xxx_dump_buffer(cmd->sense_buffer, sense_len)); 51 srb->flags |= SRB_GOT_SENSE; 52 53 /* Update srb, in case a sts_cont pkt follows */ 54 srb->req_sense_ptr += sense_len; 55 srb->req_sense_len -= sense_len; 56 if (srb->req_sense_len != 0) 57 ha->status_srb = srb; 58 else 59 ha->status_srb = NULL; 60 } 61 62 /** 63 * qla4xxx_status_cont_entry - Process a Status Continuations entry. 64 * @ha: SCSI driver HA context 65 * @sts_cont: Entry pointer 66 * 67 * Extended sense data. 68 */ 69 static void 70 qla4xxx_status_cont_entry(struct scsi_qla_host *ha, 71 struct status_cont_entry *sts_cont) 72 { 73 struct srb *srb = ha->status_srb; 74 struct scsi_cmnd *cmd; 75 uint16_t sense_len; 76 77 if (srb == NULL) 78 return; 79 80 cmd = srb->cmd; 81 if (cmd == NULL) { 82 DEBUG2(printk(KERN_INFO "scsi%ld: %s: Cmd already returned " 83 "back to OS srb=%p srb->state:%d\n", ha->host_no, 84 __func__, srb, srb->state)); 85 ha->status_srb = NULL; 86 return; 87 } 88 89 /* Copy sense data. */ 90 sense_len = min_t(uint16_t, srb->req_sense_len, 91 IOCB_MAX_EXT_SENSEDATA_LEN); 92 memcpy(srb->req_sense_ptr, sts_cont->ext_sense_data, sense_len); 93 DEBUG5(qla4xxx_dump_buffer(srb->req_sense_ptr, sense_len)); 94 95 srb->req_sense_ptr += sense_len; 96 srb->req_sense_len -= sense_len; 97 98 /* Place command on done queue. */ 99 if (srb->req_sense_len == 0) { 100 kref_put(&srb->srb_ref, qla4xxx_srb_compl); 101 ha->status_srb = NULL; 102 } 103 } 104 105 /** 106 * qla4xxx_status_entry - processes status IOCBs 107 * @ha: Pointer to host adapter structure. 108 * @sts_entry: Pointer to status entry structure. 109 **/ 110 static void qla4xxx_status_entry(struct scsi_qla_host *ha, 111 struct status_entry *sts_entry) 112 { 113 uint8_t scsi_status; 114 struct scsi_cmnd *cmd; 115 struct srb *srb; 116 struct ddb_entry *ddb_entry; 117 uint32_t residual; 118 119 srb = qla4xxx_del_from_active_array(ha, le32_to_cpu(sts_entry->handle)); 120 if (!srb) { 121 DEBUG2(printk(KERN_WARNING "scsi%ld: %s: Status Entry invalid " 122 "handle 0x%x, sp=%p. This cmd may have already " 123 "been completed.\n", ha->host_no, __func__, 124 le32_to_cpu(sts_entry->handle), srb)); 125 ql4_printk(KERN_WARNING, ha, "%s invalid status entry:" 126 " handle=0x%0x\n", __func__, sts_entry->handle); 127 set_bit(DPC_RESET_HA, &ha->dpc_flags); 128 return; 129 } 130 131 cmd = srb->cmd; 132 if (cmd == NULL) { 133 DEBUG2(printk("scsi%ld: %s: Command already returned back to " 134 "OS pkt->handle=%d srb=%p srb->state:%d\n", 135 ha->host_no, __func__, sts_entry->handle, 136 srb, srb->state)); 137 ql4_printk(KERN_WARNING, ha, "Command is NULL:" 138 " already returned to OS (srb=%p)\n", srb); 139 return; 140 } 141 142 ddb_entry = srb->ddb; 143 if (ddb_entry == NULL) { 144 cmd->result = DID_NO_CONNECT << 16; 145 goto status_entry_exit; 146 } 147 148 residual = le32_to_cpu(sts_entry->residualByteCnt); 149 150 /* Translate ISP error to a Linux SCSI error. */ 151 scsi_status = sts_entry->scsiStatus; 152 switch (sts_entry->completionStatus) { 153 case SCS_COMPLETE: 154 155 if (sts_entry->iscsiFlags & ISCSI_FLAG_RESIDUAL_OVER) { 156 cmd->result = DID_ERROR << 16; 157 break; 158 } 159 160 if (sts_entry->iscsiFlags &ISCSI_FLAG_RESIDUAL_UNDER) { 161 scsi_set_resid(cmd, residual); 162 if (!scsi_status && ((scsi_bufflen(cmd) - residual) < 163 cmd->underflow)) { 164 165 cmd->result = DID_ERROR << 16; 166 167 DEBUG2(printk("scsi%ld:%d:%d:%d: %s: " 168 "Mid-layer Data underrun0, " 169 "xferlen = 0x%x, " 170 "residual = 0x%x\n", ha->host_no, 171 cmd->device->channel, 172 cmd->device->id, 173 cmd->device->lun, __func__, 174 scsi_bufflen(cmd), residual)); 175 break; 176 } 177 } 178 179 cmd->result = DID_OK << 16 | scsi_status; 180 181 if (scsi_status != SCSI_CHECK_CONDITION) 182 break; 183 184 /* Copy Sense Data into sense buffer. */ 185 qla4xxx_copy_sense(ha, sts_entry, srb); 186 break; 187 188 case SCS_INCOMPLETE: 189 /* Always set the status to DID_ERROR, since 190 * all conditions result in that status anyway */ 191 cmd->result = DID_ERROR << 16; 192 break; 193 194 case SCS_RESET_OCCURRED: 195 DEBUG2(printk("scsi%ld:%d:%d:%d: %s: Device RESET occurred\n", 196 ha->host_no, cmd->device->channel, 197 cmd->device->id, cmd->device->lun, __func__)); 198 199 cmd->result = DID_RESET << 16; 200 break; 201 202 case SCS_ABORTED: 203 DEBUG2(printk("scsi%ld:%d:%d:%d: %s: Abort occurred\n", 204 ha->host_no, cmd->device->channel, 205 cmd->device->id, cmd->device->lun, __func__)); 206 207 cmd->result = DID_RESET << 16; 208 break; 209 210 case SCS_TIMEOUT: 211 DEBUG2(printk(KERN_INFO "scsi%ld:%d:%d:%d: Timeout\n", 212 ha->host_no, cmd->device->channel, 213 cmd->device->id, cmd->device->lun)); 214 215 cmd->result = DID_TRANSPORT_DISRUPTED << 16; 216 217 /* 218 * Mark device missing so that we won't continue to send 219 * I/O to this device. We should get a ddb state change 220 * AEN soon. 221 */ 222 if (atomic_read(&ddb_entry->state) == DDB_STATE_ONLINE) 223 qla4xxx_mark_device_missing(ha, ddb_entry); 224 break; 225 226 case SCS_DATA_UNDERRUN: 227 case SCS_DATA_OVERRUN: 228 if ((sts_entry->iscsiFlags & ISCSI_FLAG_RESIDUAL_OVER) || 229 (sts_entry->completionStatus == SCS_DATA_OVERRUN)) { 230 DEBUG2(printk("scsi%ld:%d:%d:%d: %s: " "Data overrun\n", 231 ha->host_no, 232 cmd->device->channel, cmd->device->id, 233 cmd->device->lun, __func__)); 234 235 cmd->result = DID_ERROR << 16; 236 break; 237 } 238 239 scsi_set_resid(cmd, residual); 240 241 /* 242 * If there is scsi_status, it takes precedense over 243 * underflow condition. 244 */ 245 if (scsi_status != 0) { 246 cmd->result = DID_OK << 16 | scsi_status; 247 248 if (scsi_status != SCSI_CHECK_CONDITION) 249 break; 250 251 /* Copy Sense Data into sense buffer. */ 252 qla4xxx_copy_sense(ha, sts_entry, srb); 253 } else { 254 /* 255 * If RISC reports underrun and target does not 256 * report it then we must have a lost frame, so 257 * tell upper layer to retry it by reporting a 258 * bus busy. 259 */ 260 if ((sts_entry->iscsiFlags & 261 ISCSI_FLAG_RESIDUAL_UNDER) == 0) { 262 cmd->result = DID_BUS_BUSY << 16; 263 } else if ((scsi_bufflen(cmd) - residual) < 264 cmd->underflow) { 265 /* 266 * Handle mid-layer underflow??? 267 * 268 * For kernels less than 2.4, the driver must 269 * return an error if an underflow is detected. 270 * For kernels equal-to and above 2.4, the 271 * mid-layer will appearantly handle the 272 * underflow by detecting the residual count -- 273 * unfortunately, we do not see where this is 274 * actually being done. In the interim, we 275 * will return DID_ERROR. 276 */ 277 DEBUG2(printk("scsi%ld:%d:%d:%d: %s: " 278 "Mid-layer Data underrun1, " 279 "xferlen = 0x%x, " 280 "residual = 0x%x\n", ha->host_no, 281 cmd->device->channel, 282 cmd->device->id, 283 cmd->device->lun, __func__, 284 scsi_bufflen(cmd), residual)); 285 286 cmd->result = DID_ERROR << 16; 287 } else { 288 cmd->result = DID_OK << 16; 289 } 290 } 291 break; 292 293 case SCS_DEVICE_LOGGED_OUT: 294 case SCS_DEVICE_UNAVAILABLE: 295 DEBUG2(printk(KERN_INFO "scsi%ld:%d:%d:%d: SCS_DEVICE " 296 "state: 0x%x\n", ha->host_no, 297 cmd->device->channel, cmd->device->id, 298 cmd->device->lun, sts_entry->completionStatus)); 299 /* 300 * Mark device missing so that we won't continue to 301 * send I/O to this device. We should get a ddb 302 * state change AEN soon. 303 */ 304 if (atomic_read(&ddb_entry->state) == DDB_STATE_ONLINE) 305 qla4xxx_mark_device_missing(ha, ddb_entry); 306 307 cmd->result = DID_TRANSPORT_DISRUPTED << 16; 308 break; 309 310 case SCS_QUEUE_FULL: 311 /* 312 * SCSI Mid-Layer handles device queue full 313 */ 314 cmd->result = DID_OK << 16 | sts_entry->scsiStatus; 315 DEBUG2(printk("scsi%ld:%d:%d: %s: QUEUE FULL detected " 316 "compl=%02x, scsi=%02x, state=%02x, iFlags=%02x," 317 " iResp=%02x\n", ha->host_no, cmd->device->id, 318 cmd->device->lun, __func__, 319 sts_entry->completionStatus, 320 sts_entry->scsiStatus, sts_entry->state_flags, 321 sts_entry->iscsiFlags, 322 sts_entry->iscsiResponse)); 323 break; 324 325 default: 326 cmd->result = DID_ERROR << 16; 327 break; 328 } 329 330 status_entry_exit: 331 332 /* complete the request, if not waiting for status_continuation pkt */ 333 srb->cc_stat = sts_entry->completionStatus; 334 if (ha->status_srb == NULL) 335 kref_put(&srb->srb_ref, qla4xxx_srb_compl); 336 } 337 338 /** 339 * qla4xxx_process_response_queue - process response queue completions 340 * @ha: Pointer to host adapter structure. 341 * 342 * This routine process response queue completions in interrupt context. 343 * Hardware_lock locked upon entry 344 **/ 345 void qla4xxx_process_response_queue(struct scsi_qla_host *ha) 346 { 347 uint32_t count = 0; 348 struct srb *srb = NULL; 349 struct status_entry *sts_entry; 350 351 /* Process all responses from response queue */ 352 while ((ha->response_ptr->signature != RESPONSE_PROCESSED)) { 353 sts_entry = (struct status_entry *) ha->response_ptr; 354 count++; 355 356 /* Advance pointers for next entry */ 357 if (ha->response_out == (RESPONSE_QUEUE_DEPTH - 1)) { 358 ha->response_out = 0; 359 ha->response_ptr = ha->response_ring; 360 } else { 361 ha->response_out++; 362 ha->response_ptr++; 363 } 364 365 /* process entry */ 366 switch (sts_entry->hdr.entryType) { 367 case ET_STATUS: 368 /* Common status */ 369 qla4xxx_status_entry(ha, sts_entry); 370 break; 371 372 case ET_PASSTHRU_STATUS: 373 break; 374 375 case ET_STATUS_CONTINUATION: 376 qla4xxx_status_cont_entry(ha, 377 (struct status_cont_entry *) sts_entry); 378 break; 379 380 case ET_COMMAND: 381 /* ISP device queue is full. Command not 382 * accepted by ISP. Queue command for 383 * later */ 384 385 srb = qla4xxx_del_from_active_array(ha, 386 le32_to_cpu(sts_entry-> 387 handle)); 388 if (srb == NULL) 389 goto exit_prq_invalid_handle; 390 391 DEBUG2(printk("scsi%ld: %s: FW device queue full, " 392 "srb %p\n", ha->host_no, __func__, srb)); 393 394 /* ETRY normally by sending it back with 395 * DID_BUS_BUSY */ 396 srb->cmd->result = DID_BUS_BUSY << 16; 397 kref_put(&srb->srb_ref, qla4xxx_srb_compl); 398 break; 399 400 case ET_CONTINUE: 401 /* Just throw away the continuation entries */ 402 DEBUG2(printk("scsi%ld: %s: Continuation entry - " 403 "ignoring\n", ha->host_no, __func__)); 404 break; 405 406 default: 407 /* 408 * Invalid entry in response queue, reset RISC 409 * firmware. 410 */ 411 DEBUG2(printk("scsi%ld: %s: Invalid entry %x in " 412 "response queue \n", ha->host_no, 413 __func__, 414 sts_entry->hdr.entryType)); 415 goto exit_prq_error; 416 } 417 ((struct response *)sts_entry)->signature = RESPONSE_PROCESSED; 418 wmb(); 419 } 420 421 /* 422 * Tell ISP we're done with response(s). This also clears the interrupt. 423 */ 424 ha->isp_ops->complete_iocb(ha); 425 426 return; 427 428 exit_prq_invalid_handle: 429 DEBUG2(printk("scsi%ld: %s: Invalid handle(srb)=%p type=%x IOCS=%x\n", 430 ha->host_no, __func__, srb, sts_entry->hdr.entryType, 431 sts_entry->completionStatus)); 432 433 exit_prq_error: 434 ha->isp_ops->complete_iocb(ha); 435 set_bit(DPC_RESET_HA, &ha->dpc_flags); 436 } 437 438 /** 439 * qla4xxx_isr_decode_mailbox - decodes mailbox status 440 * @ha: Pointer to host adapter structure. 441 * @mailbox_status: Mailbox status. 442 * 443 * This routine decodes the mailbox status during the ISR. 444 * Hardware_lock locked upon entry. runs in interrupt context. 445 **/ 446 static void qla4xxx_isr_decode_mailbox(struct scsi_qla_host * ha, 447 uint32_t mbox_status) 448 { 449 int i; 450 uint32_t mbox_sts[MBOX_AEN_REG_COUNT]; 451 452 if ((mbox_status == MBOX_STS_BUSY) || 453 (mbox_status == MBOX_STS_INTERMEDIATE_COMPLETION) || 454 (mbox_status >> 12 == MBOX_COMPLETION_STATUS)) { 455 ha->mbox_status[0] = mbox_status; 456 457 if (test_bit(AF_MBOX_COMMAND, &ha->flags)) { 458 /* 459 * Copy all mailbox registers to a temporary 460 * location and set mailbox command done flag 461 */ 462 for (i = 0; i < ha->mbox_status_count; i++) 463 ha->mbox_status[i] = is_qla8022(ha) 464 ? readl(&ha->qla4_8xxx_reg->mailbox_out[i]) 465 : readl(&ha->reg->mailbox[i]); 466 467 set_bit(AF_MBOX_COMMAND_DONE, &ha->flags); 468 469 if (test_bit(AF_MBOX_COMMAND_NOPOLL, &ha->flags)) 470 complete(&ha->mbx_intr_comp); 471 } 472 } else if (mbox_status >> 12 == MBOX_ASYNC_EVENT_STATUS) { 473 for (i = 0; i < MBOX_AEN_REG_COUNT; i++) 474 mbox_sts[i] = is_qla8022(ha) 475 ? readl(&ha->qla4_8xxx_reg->mailbox_out[i]) 476 : readl(&ha->reg->mailbox[i]); 477 478 /* Immediately process the AENs that don't require much work. 479 * Only queue the database_changed AENs */ 480 if (ha->aen_log.count < MAX_AEN_ENTRIES) { 481 for (i = 0; i < MBOX_AEN_REG_COUNT; i++) 482 ha->aen_log.entry[ha->aen_log.count].mbox_sts[i] = 483 mbox_sts[i]; 484 ha->aen_log.count++; 485 } 486 switch (mbox_status) { 487 case MBOX_ASTS_SYSTEM_ERROR: 488 /* Log Mailbox registers */ 489 ql4_printk(KERN_INFO, ha, "%s: System Err\n", __func__); 490 qla4xxx_dump_registers(ha); 491 492 if (ql4xdontresethba) { 493 DEBUG2(printk("scsi%ld: %s:Don't Reset HBA\n", 494 ha->host_no, __func__)); 495 } else { 496 set_bit(AF_GET_CRASH_RECORD, &ha->flags); 497 set_bit(DPC_RESET_HA, &ha->dpc_flags); 498 } 499 break; 500 501 case MBOX_ASTS_REQUEST_TRANSFER_ERROR: 502 case MBOX_ASTS_RESPONSE_TRANSFER_ERROR: 503 case MBOX_ASTS_NVRAM_INVALID: 504 case MBOX_ASTS_IP_ADDRESS_CHANGED: 505 case MBOX_ASTS_DHCP_LEASE_EXPIRED: 506 DEBUG2(printk("scsi%ld: AEN %04x, ERROR Status, " 507 "Reset HA\n", ha->host_no, mbox_status)); 508 set_bit(DPC_RESET_HA, &ha->dpc_flags); 509 break; 510 511 case MBOX_ASTS_LINK_UP: 512 set_bit(AF_LINK_UP, &ha->flags); 513 if (test_bit(AF_INIT_DONE, &ha->flags)) 514 set_bit(DPC_LINK_CHANGED, &ha->dpc_flags); 515 516 ql4_printk(KERN_INFO, ha, "%s: LINK UP\n", __func__); 517 break; 518 519 case MBOX_ASTS_LINK_DOWN: 520 clear_bit(AF_LINK_UP, &ha->flags); 521 if (test_bit(AF_INIT_DONE, &ha->flags)) 522 set_bit(DPC_LINK_CHANGED, &ha->dpc_flags); 523 524 ql4_printk(KERN_INFO, ha, "%s: LINK DOWN\n", __func__); 525 break; 526 527 case MBOX_ASTS_HEARTBEAT: 528 ha->seconds_since_last_heartbeat = 0; 529 break; 530 531 case MBOX_ASTS_DHCP_LEASE_ACQUIRED: 532 DEBUG2(printk("scsi%ld: AEN %04x DHCP LEASE " 533 "ACQUIRED\n", ha->host_no, mbox_status)); 534 set_bit(DPC_GET_DHCP_IP_ADDR, &ha->dpc_flags); 535 break; 536 537 case MBOX_ASTS_PROTOCOL_STATISTIC_ALARM: 538 case MBOX_ASTS_SCSI_COMMAND_PDU_REJECTED: /* Target 539 * mode 540 * only */ 541 case MBOX_ASTS_UNSOLICITED_PDU_RECEIVED: /* Connection mode */ 542 case MBOX_ASTS_IPSEC_SYSTEM_FATAL_ERROR: 543 case MBOX_ASTS_SUBNET_STATE_CHANGE: 544 /* No action */ 545 DEBUG2(printk("scsi%ld: AEN %04x\n", ha->host_no, 546 mbox_status)); 547 break; 548 549 case MBOX_ASTS_IP_ADDR_STATE_CHANGED: 550 printk("scsi%ld: AEN %04x, mbox_sts[2]=%04x, " 551 "mbox_sts[3]=%04x\n", ha->host_no, mbox_sts[0], 552 mbox_sts[2], mbox_sts[3]); 553 554 /* mbox_sts[2] = Old ACB state 555 * mbox_sts[3] = new ACB state */ 556 if ((mbox_sts[3] == ACB_STATE_VALID) && 557 ((mbox_sts[2] == ACB_STATE_TENTATIVE) || 558 (mbox_sts[2] == ACB_STATE_ACQUIRING))) 559 set_bit(DPC_GET_DHCP_IP_ADDR, &ha->dpc_flags); 560 else if ((mbox_sts[3] == ACB_STATE_ACQUIRING) && 561 (mbox_sts[2] == ACB_STATE_VALID)) 562 set_bit(DPC_RESET_HA, &ha->dpc_flags); 563 break; 564 565 case MBOX_ASTS_MAC_ADDRESS_CHANGED: 566 case MBOX_ASTS_DNS: 567 /* No action */ 568 DEBUG2(printk(KERN_INFO "scsi%ld: AEN %04x, " 569 "mbox_sts[1]=%04x, mbox_sts[2]=%04x\n", 570 ha->host_no, mbox_sts[0], 571 mbox_sts[1], mbox_sts[2])); 572 break; 573 574 case MBOX_ASTS_SELF_TEST_FAILED: 575 case MBOX_ASTS_LOGIN_FAILED: 576 /* No action */ 577 DEBUG2(printk("scsi%ld: AEN %04x, mbox_sts[1]=%04x, " 578 "mbox_sts[2]=%04x, mbox_sts[3]=%04x\n", 579 ha->host_no, mbox_sts[0], mbox_sts[1], 580 mbox_sts[2], mbox_sts[3])); 581 break; 582 583 case MBOX_ASTS_DATABASE_CHANGED: 584 /* Queue AEN information and process it in the DPC 585 * routine */ 586 if (ha->aen_q_count > 0) { 587 588 /* decrement available counter */ 589 ha->aen_q_count--; 590 591 for (i = 0; i < MBOX_AEN_REG_COUNT; i++) 592 ha->aen_q[ha->aen_in].mbox_sts[i] = 593 mbox_sts[i]; 594 595 /* print debug message */ 596 DEBUG2(printk("scsi%ld: AEN[%d] %04x queued" 597 " mb1:0x%x mb2:0x%x mb3:0x%x mb4:0x%x\n", 598 ha->host_no, ha->aen_in, mbox_sts[0], 599 mbox_sts[1], mbox_sts[2], mbox_sts[3], 600 mbox_sts[4])); 601 602 /* advance pointer */ 603 ha->aen_in++; 604 if (ha->aen_in == MAX_AEN_ENTRIES) 605 ha->aen_in = 0; 606 607 /* The DPC routine will process the aen */ 608 set_bit(DPC_AEN, &ha->dpc_flags); 609 } else { 610 DEBUG2(printk("scsi%ld: %s: aen %04x, queue " 611 "overflowed! AEN LOST!!\n", 612 ha->host_no, __func__, 613 mbox_sts[0])); 614 615 DEBUG2(printk("scsi%ld: DUMP AEN QUEUE\n", 616 ha->host_no)); 617 618 for (i = 0; i < MAX_AEN_ENTRIES; i++) { 619 DEBUG2(printk("AEN[%d] %04x %04x %04x " 620 "%04x\n", i, mbox_sts[0], 621 mbox_sts[1], mbox_sts[2], 622 mbox_sts[3])); 623 } 624 } 625 break; 626 627 case MBOX_ASTS_TXSCVR_INSERTED: 628 DEBUG2(printk(KERN_WARNING 629 "scsi%ld: AEN %04x Transceiver" 630 " inserted\n", ha->host_no, mbox_sts[0])); 631 break; 632 633 case MBOX_ASTS_TXSCVR_REMOVED: 634 DEBUG2(printk(KERN_WARNING 635 "scsi%ld: AEN %04x Transceiver" 636 " removed\n", ha->host_no, mbox_sts[0])); 637 break; 638 639 default: 640 DEBUG2(printk(KERN_WARNING 641 "scsi%ld: AEN %04x UNKNOWN\n", 642 ha->host_no, mbox_sts[0])); 643 break; 644 } 645 } else { 646 DEBUG2(printk("scsi%ld: Unknown mailbox status %08X\n", 647 ha->host_no, mbox_status)); 648 649 ha->mbox_status[0] = mbox_status; 650 } 651 } 652 653 /** 654 * qla4_8xxx_interrupt_service_routine - isr 655 * @ha: pointer to host adapter structure. 656 * 657 * This is the main interrupt service routine. 658 * hardware_lock locked upon entry. runs in interrupt context. 659 **/ 660 void qla4_8xxx_interrupt_service_routine(struct scsi_qla_host *ha, 661 uint32_t intr_status) 662 { 663 /* Process response queue interrupt. */ 664 if (intr_status & HSRX_RISC_IOCB_INT) 665 qla4xxx_process_response_queue(ha); 666 667 /* Process mailbox/asynch event interrupt.*/ 668 if (intr_status & HSRX_RISC_MB_INT) 669 qla4xxx_isr_decode_mailbox(ha, 670 readl(&ha->qla4_8xxx_reg->mailbox_out[0])); 671 672 /* clear the interrupt */ 673 writel(0, &ha->qla4_8xxx_reg->host_int); 674 readl(&ha->qla4_8xxx_reg->host_int); 675 } 676 677 /** 678 * qla4xxx_interrupt_service_routine - isr 679 * @ha: pointer to host adapter structure. 680 * 681 * This is the main interrupt service routine. 682 * hardware_lock locked upon entry. runs in interrupt context. 683 **/ 684 void qla4xxx_interrupt_service_routine(struct scsi_qla_host * ha, 685 uint32_t intr_status) 686 { 687 /* Process response queue interrupt. */ 688 if (intr_status & CSR_SCSI_COMPLETION_INTR) 689 qla4xxx_process_response_queue(ha); 690 691 /* Process mailbox/asynch event interrupt.*/ 692 if (intr_status & CSR_SCSI_PROCESSOR_INTR) { 693 qla4xxx_isr_decode_mailbox(ha, 694 readl(&ha->reg->mailbox[0])); 695 696 /* Clear Mailbox Interrupt */ 697 writel(set_rmask(CSR_SCSI_PROCESSOR_INTR), 698 &ha->reg->ctrl_status); 699 readl(&ha->reg->ctrl_status); 700 } 701 } 702 703 /** 704 * qla4_8xxx_spurious_interrupt - processes spurious interrupt 705 * @ha: pointer to host adapter structure. 706 * @reqs_count: . 707 * 708 **/ 709 static void qla4_8xxx_spurious_interrupt(struct scsi_qla_host *ha, 710 uint8_t reqs_count) 711 { 712 if (reqs_count) 713 return; 714 715 DEBUG2(ql4_printk(KERN_INFO, ha, "Spurious Interrupt\n")); 716 if (is_qla8022(ha)) { 717 writel(0, &ha->qla4_8xxx_reg->host_int); 718 if (test_bit(AF_INTx_ENABLED, &ha->flags)) 719 qla4_8xxx_wr_32(ha, ha->nx_legacy_intr.tgt_mask_reg, 720 0xfbff); 721 } 722 ha->spurious_int_count++; 723 } 724 725 /** 726 * qla4xxx_intr_handler - hardware interrupt handler. 727 * @irq: Unused 728 * @dev_id: Pointer to host adapter structure 729 **/ 730 irqreturn_t qla4xxx_intr_handler(int irq, void *dev_id) 731 { 732 struct scsi_qla_host *ha; 733 uint32_t intr_status; 734 unsigned long flags = 0; 735 uint8_t reqs_count = 0; 736 737 ha = (struct scsi_qla_host *) dev_id; 738 if (!ha) { 739 DEBUG2(printk(KERN_INFO 740 "qla4xxx: Interrupt with NULL host ptr\n")); 741 return IRQ_NONE; 742 } 743 744 spin_lock_irqsave(&ha->hardware_lock, flags); 745 746 ha->isr_count++; 747 /* 748 * Repeatedly service interrupts up to a maximum of 749 * MAX_REQS_SERVICED_PER_INTR 750 */ 751 while (1) { 752 /* 753 * Read interrupt status 754 */ 755 if (ha->isp_ops->rd_shdw_rsp_q_in(ha) != 756 ha->response_out) 757 intr_status = CSR_SCSI_COMPLETION_INTR; 758 else 759 intr_status = readl(&ha->reg->ctrl_status); 760 761 if ((intr_status & 762 (CSR_SCSI_RESET_INTR|CSR_FATAL_ERROR|INTR_PENDING)) == 0) { 763 if (reqs_count == 0) 764 ha->spurious_int_count++; 765 break; 766 } 767 768 if (intr_status & CSR_FATAL_ERROR) { 769 DEBUG2(printk(KERN_INFO "scsi%ld: Fatal Error, " 770 "Status 0x%04x\n", ha->host_no, 771 readl(isp_port_error_status (ha)))); 772 773 /* Issue Soft Reset to clear this error condition. 774 * This will prevent the RISC from repeatedly 775 * interrupting the driver; thus, allowing the DPC to 776 * get scheduled to continue error recovery. 777 * NOTE: Disabling RISC interrupts does not work in 778 * this case, as CSR_FATAL_ERROR overrides 779 * CSR_SCSI_INTR_ENABLE */ 780 if ((readl(&ha->reg->ctrl_status) & 781 CSR_SCSI_RESET_INTR) == 0) { 782 writel(set_rmask(CSR_SOFT_RESET), 783 &ha->reg->ctrl_status); 784 readl(&ha->reg->ctrl_status); 785 } 786 787 writel(set_rmask(CSR_FATAL_ERROR), 788 &ha->reg->ctrl_status); 789 readl(&ha->reg->ctrl_status); 790 791 __qla4xxx_disable_intrs(ha); 792 793 set_bit(DPC_RESET_HA, &ha->dpc_flags); 794 795 break; 796 } else if (intr_status & CSR_SCSI_RESET_INTR) { 797 clear_bit(AF_ONLINE, &ha->flags); 798 __qla4xxx_disable_intrs(ha); 799 800 writel(set_rmask(CSR_SCSI_RESET_INTR), 801 &ha->reg->ctrl_status); 802 readl(&ha->reg->ctrl_status); 803 804 if (!test_bit(AF_HBA_GOING_AWAY, &ha->flags)) 805 set_bit(DPC_RESET_HA_INTR, &ha->dpc_flags); 806 807 break; 808 } else if (intr_status & INTR_PENDING) { 809 ha->isp_ops->interrupt_service_routine(ha, intr_status); 810 ha->total_io_count++; 811 if (++reqs_count == MAX_REQS_SERVICED_PER_INTR) 812 break; 813 } 814 } 815 816 spin_unlock_irqrestore(&ha->hardware_lock, flags); 817 818 return IRQ_HANDLED; 819 } 820 821 /** 822 * qla4_8xxx_intr_handler - hardware interrupt handler. 823 * @irq: Unused 824 * @dev_id: Pointer to host adapter structure 825 **/ 826 irqreturn_t qla4_8xxx_intr_handler(int irq, void *dev_id) 827 { 828 struct scsi_qla_host *ha = dev_id; 829 uint32_t intr_status; 830 uint32_t status; 831 unsigned long flags = 0; 832 uint8_t reqs_count = 0; 833 834 if (unlikely(pci_channel_offline(ha->pdev))) 835 return IRQ_HANDLED; 836 837 ha->isr_count++; 838 status = qla4_8xxx_rd_32(ha, ISR_INT_VECTOR); 839 if (!(status & ha->nx_legacy_intr.int_vec_bit)) 840 return IRQ_NONE; 841 842 status = qla4_8xxx_rd_32(ha, ISR_INT_STATE_REG); 843 if (!ISR_IS_LEGACY_INTR_TRIGGERED(status)) { 844 DEBUG2(ql4_printk(KERN_INFO, ha, 845 "%s legacy Int not triggered\n", __func__)); 846 return IRQ_NONE; 847 } 848 849 /* clear the interrupt */ 850 qla4_8xxx_wr_32(ha, ha->nx_legacy_intr.tgt_status_reg, 0xffffffff); 851 852 /* read twice to ensure write is flushed */ 853 qla4_8xxx_rd_32(ha, ISR_INT_VECTOR); 854 qla4_8xxx_rd_32(ha, ISR_INT_VECTOR); 855 856 spin_lock_irqsave(&ha->hardware_lock, flags); 857 while (1) { 858 if (!(readl(&ha->qla4_8xxx_reg->host_int) & 859 ISRX_82XX_RISC_INT)) { 860 qla4_8xxx_spurious_interrupt(ha, reqs_count); 861 break; 862 } 863 intr_status = readl(&ha->qla4_8xxx_reg->host_status); 864 if ((intr_status & 865 (HSRX_RISC_MB_INT | HSRX_RISC_IOCB_INT)) == 0) { 866 qla4_8xxx_spurious_interrupt(ha, reqs_count); 867 break; 868 } 869 870 ha->isp_ops->interrupt_service_routine(ha, intr_status); 871 872 /* Enable Interrupt */ 873 qla4_8xxx_wr_32(ha, ha->nx_legacy_intr.tgt_mask_reg, 0xfbff); 874 875 if (++reqs_count == MAX_REQS_SERVICED_PER_INTR) 876 break; 877 } 878 879 spin_unlock_irqrestore(&ha->hardware_lock, flags); 880 return IRQ_HANDLED; 881 } 882 883 irqreturn_t 884 qla4_8xxx_msi_handler(int irq, void *dev_id) 885 { 886 struct scsi_qla_host *ha; 887 888 ha = (struct scsi_qla_host *) dev_id; 889 if (!ha) { 890 DEBUG2(printk(KERN_INFO 891 "qla4xxx: MSIX: Interrupt with NULL host ptr\n")); 892 return IRQ_NONE; 893 } 894 895 ha->isr_count++; 896 /* clear the interrupt */ 897 qla4_8xxx_wr_32(ha, ha->nx_legacy_intr.tgt_status_reg, 0xffffffff); 898 899 /* read twice to ensure write is flushed */ 900 qla4_8xxx_rd_32(ha, ISR_INT_VECTOR); 901 qla4_8xxx_rd_32(ha, ISR_INT_VECTOR); 902 903 return qla4_8xxx_default_intr_handler(irq, dev_id); 904 } 905 906 /** 907 * qla4_8xxx_default_intr_handler - hardware interrupt handler. 908 * @irq: Unused 909 * @dev_id: Pointer to host adapter structure 910 * 911 * This interrupt handler is called directly for MSI-X, and 912 * called indirectly for MSI. 913 **/ 914 irqreturn_t 915 qla4_8xxx_default_intr_handler(int irq, void *dev_id) 916 { 917 struct scsi_qla_host *ha = dev_id; 918 unsigned long flags; 919 uint32_t intr_status; 920 uint8_t reqs_count = 0; 921 922 spin_lock_irqsave(&ha->hardware_lock, flags); 923 while (1) { 924 if (!(readl(&ha->qla4_8xxx_reg->host_int) & 925 ISRX_82XX_RISC_INT)) { 926 qla4_8xxx_spurious_interrupt(ha, reqs_count); 927 break; 928 } 929 930 intr_status = readl(&ha->qla4_8xxx_reg->host_status); 931 if ((intr_status & 932 (HSRX_RISC_MB_INT | HSRX_RISC_IOCB_INT)) == 0) { 933 qla4_8xxx_spurious_interrupt(ha, reqs_count); 934 break; 935 } 936 937 ha->isp_ops->interrupt_service_routine(ha, intr_status); 938 939 if (++reqs_count == MAX_REQS_SERVICED_PER_INTR) 940 break; 941 } 942 943 ha->isr_count++; 944 spin_unlock_irqrestore(&ha->hardware_lock, flags); 945 return IRQ_HANDLED; 946 } 947 948 irqreturn_t 949 qla4_8xxx_msix_rsp_q(int irq, void *dev_id) 950 { 951 struct scsi_qla_host *ha = dev_id; 952 unsigned long flags; 953 954 spin_lock_irqsave(&ha->hardware_lock, flags); 955 qla4xxx_process_response_queue(ha); 956 writel(0, &ha->qla4_8xxx_reg->host_int); 957 spin_unlock_irqrestore(&ha->hardware_lock, flags); 958 959 ha->isr_count++; 960 return IRQ_HANDLED; 961 } 962 963 /** 964 * qla4xxx_process_aen - processes AENs generated by firmware 965 * @ha: pointer to host adapter structure. 966 * @process_aen: type of AENs to process 967 * 968 * Processes specific types of Asynchronous Events generated by firmware. 969 * The type of AENs to process is specified by process_aen and can be 970 * PROCESS_ALL_AENS 0 971 * FLUSH_DDB_CHANGED_AENS 1 972 * RELOGIN_DDB_CHANGED_AENS 2 973 **/ 974 void qla4xxx_process_aen(struct scsi_qla_host * ha, uint8_t process_aen) 975 { 976 uint32_t mbox_sts[MBOX_AEN_REG_COUNT]; 977 struct aen *aen; 978 int i; 979 unsigned long flags; 980 981 spin_lock_irqsave(&ha->hardware_lock, flags); 982 while (ha->aen_out != ha->aen_in) { 983 aen = &ha->aen_q[ha->aen_out]; 984 /* copy aen information to local structure */ 985 for (i = 0; i < MBOX_AEN_REG_COUNT; i++) 986 mbox_sts[i] = aen->mbox_sts[i]; 987 988 ha->aen_q_count++; 989 ha->aen_out++; 990 991 if (ha->aen_out == MAX_AEN_ENTRIES) 992 ha->aen_out = 0; 993 994 spin_unlock_irqrestore(&ha->hardware_lock, flags); 995 996 DEBUG2(printk("qla4xxx(%ld): AEN[%d]=0x%08x, mbx1=0x%08x mbx2=0x%08x" 997 " mbx3=0x%08x mbx4=0x%08x\n", ha->host_no, 998 (ha->aen_out ? (ha->aen_out-1): (MAX_AEN_ENTRIES-1)), 999 mbox_sts[0], mbox_sts[1], mbox_sts[2], 1000 mbox_sts[3], mbox_sts[4])); 1001 1002 switch (mbox_sts[0]) { 1003 case MBOX_ASTS_DATABASE_CHANGED: 1004 if (process_aen == FLUSH_DDB_CHANGED_AENS) { 1005 DEBUG2(printk("scsi%ld: AEN[%d] %04x, index " 1006 "[%d] state=%04x FLUSHED!\n", 1007 ha->host_no, ha->aen_out, 1008 mbox_sts[0], mbox_sts[2], 1009 mbox_sts[3])); 1010 break; 1011 } else if (process_aen == RELOGIN_DDB_CHANGED_AENS) { 1012 /* for use during init time, we only want to 1013 * relogin non-active ddbs */ 1014 struct ddb_entry *ddb_entry; 1015 1016 ddb_entry = 1017 /* FIXME: name length? */ 1018 qla4xxx_lookup_ddb_by_fw_index(ha, 1019 mbox_sts[2]); 1020 if (!ddb_entry) 1021 break; 1022 1023 ddb_entry->dev_scan_wait_to_complete_relogin = 1024 0; 1025 ddb_entry->dev_scan_wait_to_start_relogin = 1026 jiffies + 1027 ((ddb_entry->default_time2wait + 1028 4) * HZ); 1029 1030 DEBUG2(printk("scsi%ld: ddb [%d] initiate" 1031 " RELOGIN after %d seconds\n", 1032 ha->host_no, 1033 ddb_entry->fw_ddb_index, 1034 ddb_entry->default_time2wait + 1035 4)); 1036 break; 1037 } 1038 1039 if (mbox_sts[1] == 0) { /* Global DB change. */ 1040 qla4xxx_reinitialize_ddb_list(ha); 1041 } else if (mbox_sts[1] == 1) { /* Specific device. */ 1042 qla4xxx_process_ddb_changed(ha, mbox_sts[2], 1043 mbox_sts[3], mbox_sts[4]); 1044 } 1045 break; 1046 } 1047 spin_lock_irqsave(&ha->hardware_lock, flags); 1048 } 1049 spin_unlock_irqrestore(&ha->hardware_lock, flags); 1050 } 1051 1052 int qla4xxx_request_irqs(struct scsi_qla_host *ha) 1053 { 1054 int ret; 1055 1056 if (!is_qla8022(ha)) 1057 goto try_intx; 1058 1059 if (ql4xenablemsix == 2) 1060 goto try_msi; 1061 1062 if (ql4xenablemsix == 0 || ql4xenablemsix != 1) 1063 goto try_intx; 1064 1065 /* Trying MSI-X */ 1066 ret = qla4_8xxx_enable_msix(ha); 1067 if (!ret) { 1068 DEBUG2(ql4_printk(KERN_INFO, ha, 1069 "MSI-X: Enabled (0x%X).\n", ha->revision_id)); 1070 goto irq_attached; 1071 } 1072 1073 ql4_printk(KERN_WARNING, ha, 1074 "MSI-X: Falling back-to MSI mode -- %d.\n", ret); 1075 1076 try_msi: 1077 /* Trying MSI */ 1078 ret = pci_enable_msi(ha->pdev); 1079 if (!ret) { 1080 ret = request_irq(ha->pdev->irq, qla4_8xxx_msi_handler, 1081 0, DRIVER_NAME, ha); 1082 if (!ret) { 1083 DEBUG2(ql4_printk(KERN_INFO, ha, "MSI: Enabled.\n")); 1084 set_bit(AF_MSI_ENABLED, &ha->flags); 1085 goto irq_attached; 1086 } else { 1087 ql4_printk(KERN_WARNING, ha, 1088 "MSI: Failed to reserve interrupt %d " 1089 "already in use.\n", ha->pdev->irq); 1090 pci_disable_msi(ha->pdev); 1091 } 1092 } 1093 ql4_printk(KERN_WARNING, ha, 1094 "MSI: Falling back-to INTx mode -- %d.\n", ret); 1095 1096 try_intx: 1097 /* Trying INTx */ 1098 ret = request_irq(ha->pdev->irq, ha->isp_ops->intr_handler, 1099 IRQF_SHARED, DRIVER_NAME, ha); 1100 if (!ret) { 1101 DEBUG2(ql4_printk(KERN_INFO, ha, "INTx: Enabled.\n")); 1102 set_bit(AF_INTx_ENABLED, &ha->flags); 1103 goto irq_attached; 1104 1105 } else { 1106 ql4_printk(KERN_WARNING, ha, 1107 "INTx: Failed to reserve interrupt %d already in" 1108 " use.\n", ha->pdev->irq); 1109 return ret; 1110 } 1111 1112 irq_attached: 1113 set_bit(AF_IRQ_ATTACHED, &ha->flags); 1114 ha->host->irq = ha->pdev->irq; 1115 ql4_printk(KERN_INFO, ha, "%s: irq %d attached\n", 1116 __func__, ha->pdev->irq); 1117 return ret; 1118 } 1119 1120 void qla4xxx_free_irqs(struct scsi_qla_host *ha) 1121 { 1122 if (test_bit(AF_MSIX_ENABLED, &ha->flags)) 1123 qla4_8xxx_disable_msix(ha); 1124 else if (test_and_clear_bit(AF_MSI_ENABLED, &ha->flags)) { 1125 free_irq(ha->pdev->irq, ha); 1126 pci_disable_msi(ha->pdev); 1127 } else if (test_and_clear_bit(AF_INTx_ENABLED, &ha->flags)) 1128 free_irq(ha->pdev->irq, ha); 1129 } 1130