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ql4_isr.c
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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 
19 static void qla4xxx_copy_sense(struct scsi_qla_host *ha,
20  struct status_entry *sts_entry,
21  struct srb *srb)
22 {
23  struct scsi_cmnd *cmd = srb->cmd;
24  uint16_t sense_len;
25 
26  memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
27  sense_len = le16_to_cpu(sts_entry->senseDataByteCnt);
28  if (sense_len == 0) {
29  DEBUG2(ql4_printk(KERN_INFO, ha, "scsi%ld:%d:%d:%d: %s:"
30  " sense len 0\n", ha->host_no,
31  cmd->device->channel, cmd->device->id,
32  cmd->device->lun, __func__));
33  ha->status_srb = NULL;
34  return;
35  }
36  /* Save total available sense length,
37  * not to exceed cmd's sense buffer size */
38  sense_len = min_t(uint16_t, sense_len, SCSI_SENSE_BUFFERSIZE);
39  srb->req_sense_ptr = cmd->sense_buffer;
40  srb->req_sense_len = sense_len;
41 
42  /* Copy sense from sts_entry pkt */
43  sense_len = min_t(uint16_t, sense_len, IOCB_MAX_SENSEDATA_LEN);
44  memcpy(cmd->sense_buffer, sts_entry->senseData, sense_len);
45 
46  DEBUG2(printk(KERN_INFO "scsi%ld:%d:%d:%d: %s: sense key = %x, "
47  "ASL= %02x, ASC/ASCQ = %02x/%02x\n", ha->host_no,
48  cmd->device->channel, cmd->device->id,
49  cmd->device->lun, __func__,
50  sts_entry->senseData[2] & 0x0f,
51  sts_entry->senseData[7],
52  sts_entry->senseData[12],
53  sts_entry->senseData[13]));
54 
55  DEBUG5(qla4xxx_dump_buffer(cmd->sense_buffer, sense_len));
56  srb->flags |= SRB_GOT_SENSE;
57 
58  /* Update srb, in case a sts_cont pkt follows */
59  srb->req_sense_ptr += sense_len;
60  srb->req_sense_len -= sense_len;
61  if (srb->req_sense_len != 0)
62  ha->status_srb = srb;
63  else
64  ha->status_srb = NULL;
65 }
66 
74 static void
75 qla4xxx_status_cont_entry(struct scsi_qla_host *ha,
76  struct status_cont_entry *sts_cont)
77 {
78  struct srb *srb = ha->status_srb;
79  struct scsi_cmnd *cmd;
80  uint16_t sense_len;
81 
82  if (srb == NULL)
83  return;
84 
85  cmd = srb->cmd;
86  if (cmd == NULL) {
87  DEBUG2(printk(KERN_INFO "scsi%ld: %s: Cmd already returned "
88  "back to OS srb=%p srb->state:%d\n", ha->host_no,
89  __func__, srb, srb->state));
90  ha->status_srb = NULL;
91  return;
92  }
93 
94  /* Copy sense data. */
95  sense_len = min_t(uint16_t, srb->req_sense_len,
96  IOCB_MAX_EXT_SENSEDATA_LEN);
97  memcpy(srb->req_sense_ptr, sts_cont->ext_sense_data, sense_len);
98  DEBUG5(qla4xxx_dump_buffer(srb->req_sense_ptr, sense_len));
99 
100  srb->req_sense_ptr += sense_len;
101  srb->req_sense_len -= sense_len;
102 
103  /* Place command on done queue. */
104  if (srb->req_sense_len == 0) {
105  kref_put(&srb->srb_ref, qla4xxx_srb_compl);
106  ha->status_srb = NULL;
107  }
108 }
109 
115 static void qla4xxx_status_entry(struct scsi_qla_host *ha,
116  struct status_entry *sts_entry)
117 {
118  uint8_t scsi_status;
119  struct scsi_cmnd *cmd;
120  struct srb *srb;
121  struct ddb_entry *ddb_entry;
122  uint32_t residual;
123 
124  srb = qla4xxx_del_from_active_array(ha, le32_to_cpu(sts_entry->handle));
125  if (!srb) {
126  ql4_printk(KERN_WARNING, ha, "%s invalid status entry: "
127  "handle=0x%0x, srb=%p\n", __func__,
128  sts_entry->handle, srb);
129  if (is_qla80XX(ha))
130  set_bit(DPC_RESET_HA_FW_CONTEXT, &ha->dpc_flags);
131  else
132  set_bit(DPC_RESET_HA, &ha->dpc_flags);
133  return;
134  }
135 
136  cmd = srb->cmd;
137  if (cmd == NULL) {
138  DEBUG2(printk("scsi%ld: %s: Command already returned back to "
139  "OS pkt->handle=%d srb=%p srb->state:%d\n",
140  ha->host_no, __func__, sts_entry->handle,
141  srb, srb->state));
142  ql4_printk(KERN_WARNING, ha, "Command is NULL:"
143  " already returned to OS (srb=%p)\n", srb);
144  return;
145  }
146 
147  ddb_entry = srb->ddb;
148  if (ddb_entry == NULL) {
149  cmd->result = DID_NO_CONNECT << 16;
150  goto status_entry_exit;
151  }
152 
153  residual = le32_to_cpu(sts_entry->residualByteCnt);
154 
155  /* Translate ISP error to a Linux SCSI error. */
156  scsi_status = sts_entry->scsiStatus;
157  switch (sts_entry->completionStatus) {
158  case SCS_COMPLETE:
159 
160  if (sts_entry->iscsiFlags & ISCSI_FLAG_RESIDUAL_OVER) {
161  cmd->result = DID_ERROR << 16;
162  break;
163  }
164 
165  if (sts_entry->iscsiFlags &ISCSI_FLAG_RESIDUAL_UNDER) {
166  scsi_set_resid(cmd, residual);
167  if (!scsi_status && ((scsi_bufflen(cmd) - residual) <
168  cmd->underflow)) {
169 
170  cmd->result = DID_ERROR << 16;
171 
172  DEBUG2(printk("scsi%ld:%d:%d:%d: %s: "
173  "Mid-layer Data underrun0, "
174  "xferlen = 0x%x, "
175  "residual = 0x%x\n", ha->host_no,
176  cmd->device->channel,
177  cmd->device->id,
178  cmd->device->lun, __func__,
179  scsi_bufflen(cmd), residual));
180  break;
181  }
182  }
183 
184  cmd->result = DID_OK << 16 | scsi_status;
185 
186  if (scsi_status != SCSI_CHECK_CONDITION)
187  break;
188 
189  /* Copy Sense Data into sense buffer. */
190  qla4xxx_copy_sense(ha, sts_entry, srb);
191  break;
192 
193  case SCS_INCOMPLETE:
194  /* Always set the status to DID_ERROR, since
195  * all conditions result in that status anyway */
196  cmd->result = DID_ERROR << 16;
197  break;
198 
199  case SCS_RESET_OCCURRED:
200  DEBUG2(printk("scsi%ld:%d:%d:%d: %s: Device RESET occurred\n",
201  ha->host_no, cmd->device->channel,
202  cmd->device->id, cmd->device->lun, __func__));
203 
204  cmd->result = DID_RESET << 16;
205  break;
206 
207  case SCS_ABORTED:
208  DEBUG2(printk("scsi%ld:%d:%d:%d: %s: Abort occurred\n",
209  ha->host_no, cmd->device->channel,
210  cmd->device->id, cmd->device->lun, __func__));
211 
212  cmd->result = DID_RESET << 16;
213  break;
214 
215  case SCS_TIMEOUT:
216  DEBUG2(printk(KERN_INFO "scsi%ld:%d:%d:%d: Timeout\n",
217  ha->host_no, cmd->device->channel,
218  cmd->device->id, cmd->device->lun));
219 
220  cmd->result = DID_TRANSPORT_DISRUPTED << 16;
221 
222  /*
223  * Mark device missing so that we won't continue to send
224  * I/O to this device. We should get a ddb state change
225  * AEN soon.
226  */
227  if (iscsi_is_session_online(ddb_entry->sess))
228  qla4xxx_mark_device_missing(ddb_entry->sess);
229  break;
230 
231  case SCS_DATA_UNDERRUN:
232  case SCS_DATA_OVERRUN:
233  if ((sts_entry->iscsiFlags & ISCSI_FLAG_RESIDUAL_OVER) ||
234  (sts_entry->completionStatus == SCS_DATA_OVERRUN)) {
235  DEBUG2(printk("scsi%ld:%d:%d:%d: %s: " "Data overrun\n",
236  ha->host_no,
237  cmd->device->channel, cmd->device->id,
238  cmd->device->lun, __func__));
239 
240  cmd->result = DID_ERROR << 16;
241  break;
242  }
243 
244  scsi_set_resid(cmd, residual);
245 
246  if (sts_entry->iscsiFlags & ISCSI_FLAG_RESIDUAL_UNDER) {
247 
248  /* Both the firmware and target reported UNDERRUN:
249  *
250  * MID-LAYER UNDERFLOW case:
251  * Some kernels do not properly detect midlayer
252  * underflow, so we manually check it and return
253  * ERROR if the minimum required data was not
254  * received.
255  *
256  * ALL OTHER cases:
257  * Fall thru to check scsi_status
258  */
259  if (!scsi_status && (scsi_bufflen(cmd) - residual) <
260  cmd->underflow) {
261  DEBUG2(ql4_printk(KERN_INFO, ha,
262  "scsi%ld:%d:%d:%d: %s: Mid-layer Data underrun, xferlen = 0x%x,residual = 0x%x\n",
263  ha->host_no,
264  cmd->device->channel,
265  cmd->device->id,
266  cmd->device->lun, __func__,
267  scsi_bufflen(cmd),
268  residual));
269 
270  cmd->result = DID_ERROR << 16;
271  break;
272  }
273 
274  } else if (scsi_status != SAM_STAT_TASK_SET_FULL &&
275  scsi_status != SAM_STAT_BUSY) {
276 
277  /*
278  * The firmware reports UNDERRUN, but the target does
279  * not report it:
280  *
281  * scsi_status | host_byte device_byte
282  * | (19:16) (7:0)
283  * ============= | ========= ===========
284  * TASK_SET_FULL | DID_OK scsi_status
285  * BUSY | DID_OK scsi_status
286  * ALL OTHERS | DID_ERROR scsi_status
287  *
288  * Note: If scsi_status is task set full or busy,
289  * then this else if would fall thru to check the
290  * scsi_status and return DID_OK.
291  */
292 
293  DEBUG2(ql4_printk(KERN_INFO, ha,
294  "scsi%ld:%d:%d:%d: %s: Dropped frame(s) detected (0x%x of 0x%x bytes).\n",
295  ha->host_no,
296  cmd->device->channel,
297  cmd->device->id,
298  cmd->device->lun, __func__,
299  residual,
300  scsi_bufflen(cmd)));
301 
302  cmd->result = DID_ERROR << 16 | scsi_status;
303  goto check_scsi_status;
304  }
305 
306  cmd->result = DID_OK << 16 | scsi_status;
307 
308 check_scsi_status:
309  if (scsi_status == SAM_STAT_CHECK_CONDITION)
310  qla4xxx_copy_sense(ha, sts_entry, srb);
311 
312  break;
313 
314  case SCS_DEVICE_LOGGED_OUT:
315  case SCS_DEVICE_UNAVAILABLE:
316  DEBUG2(printk(KERN_INFO "scsi%ld:%d:%d:%d: SCS_DEVICE "
317  "state: 0x%x\n", ha->host_no,
318  cmd->device->channel, cmd->device->id,
319  cmd->device->lun, sts_entry->completionStatus));
320  /*
321  * Mark device missing so that we won't continue to
322  * send I/O to this device. We should get a ddb
323  * state change AEN soon.
324  */
325  if (iscsi_is_session_online(ddb_entry->sess))
326  qla4xxx_mark_device_missing(ddb_entry->sess);
327 
328  cmd->result = DID_TRANSPORT_DISRUPTED << 16;
329  break;
330 
331  case SCS_QUEUE_FULL:
332  /*
333  * SCSI Mid-Layer handles device queue full
334  */
335  cmd->result = DID_OK << 16 | sts_entry->scsiStatus;
336  DEBUG2(printk("scsi%ld:%d:%d: %s: QUEUE FULL detected "
337  "compl=%02x, scsi=%02x, state=%02x, iFlags=%02x,"
338  " iResp=%02x\n", ha->host_no, cmd->device->id,
339  cmd->device->lun, __func__,
340  sts_entry->completionStatus,
341  sts_entry->scsiStatus, sts_entry->state_flags,
342  sts_entry->iscsiFlags,
343  sts_entry->iscsiResponse));
344  break;
345 
346  default:
347  cmd->result = DID_ERROR << 16;
348  break;
349  }
350 
351 status_entry_exit:
352 
353  /* complete the request, if not waiting for status_continuation pkt */
354  srb->cc_stat = sts_entry->completionStatus;
355  if (ha->status_srb == NULL)
356  kref_put(&srb->srb_ref, qla4xxx_srb_compl);
357 }
358 
364 static void qla4xxx_passthru_status_entry(struct scsi_qla_host *ha,
365  struct passthru_status *sts_entry)
366 {
367  struct iscsi_task *task;
368  struct ddb_entry *ddb_entry;
369  struct ql4_task_data *task_data;
370  struct iscsi_cls_conn *cls_conn;
371  struct iscsi_conn *conn;
372  itt_t itt;
373  uint32_t fw_ddb_index;
374 
375  itt = sts_entry->handle;
376  fw_ddb_index = le32_to_cpu(sts_entry->target);
377 
378  ddb_entry = qla4xxx_lookup_ddb_by_fw_index(ha, fw_ddb_index);
379 
380  if (ddb_entry == NULL) {
381  ql4_printk(KERN_ERR, ha, "%s: Invalid target index = 0x%x\n",
382  __func__, sts_entry->target);
383  return;
384  }
385 
386  cls_conn = ddb_entry->conn;
387  conn = cls_conn->dd_data;
388  spin_lock(&conn->session->lock);
389  task = iscsi_itt_to_task(conn, itt);
390  spin_unlock(&conn->session->lock);
391 
392  if (task == NULL) {
393  ql4_printk(KERN_ERR, ha, "%s: Task is NULL\n", __func__);
394  return;
395  }
396 
397  task_data = task->dd_data;
398  memcpy(&task_data->sts, sts_entry, sizeof(struct passthru_status));
399  ha->req_q_count += task_data->iocb_req_cnt;
400  ha->iocb_cnt -= task_data->iocb_req_cnt;
401  queue_work(ha->task_wq, &task_data->task_work);
402 }
403 
404 static struct mrb *qla4xxx_del_mrb_from_active_array(struct scsi_qla_host *ha,
405  uint32_t index)
406 {
407  struct mrb *mrb = NULL;
408 
409  /* validate handle and remove from active array */
410  if (index >= MAX_MRB)
411  return mrb;
412 
413  mrb = ha->active_mrb_array[index];
414  ha->active_mrb_array[index] = NULL;
415  if (!mrb)
416  return mrb;
417 
418  /* update counters */
419  ha->req_q_count += mrb->iocb_cnt;
420  ha->iocb_cnt -= mrb->iocb_cnt;
421 
422  return mrb;
423 }
424 
425 static void qla4xxx_mbox_status_entry(struct scsi_qla_host *ha,
426  struct mbox_status_iocb *mbox_sts_entry)
427 {
428  struct mrb *mrb;
429  uint32_t status;
430  uint32_t data_size;
431 
432  mrb = qla4xxx_del_mrb_from_active_array(ha,
433  le32_to_cpu(mbox_sts_entry->handle));
434 
435  if (mrb == NULL) {
436  ql4_printk(KERN_WARNING, ha, "%s: mrb[%d] is null\n", __func__,
437  mbox_sts_entry->handle);
438  return;
439  }
440 
441  switch (mrb->mbox_cmd) {
442  case MBOX_CMD_PING:
443  DEBUG2(ql4_printk(KERN_INFO, ha, "%s: mbox_cmd = 0x%x, "
444  "mbox_sts[0] = 0x%x, mbox_sts[6] = 0x%x\n",
445  __func__, mrb->mbox_cmd,
446  mbox_sts_entry->out_mbox[0],
447  mbox_sts_entry->out_mbox[6]));
448 
449  if (mbox_sts_entry->out_mbox[0] == MBOX_STS_COMMAND_COMPLETE)
450  status = ISCSI_PING_SUCCESS;
451  else
452  status = mbox_sts_entry->out_mbox[6];
453 
454  data_size = sizeof(mbox_sts_entry->out_mbox);
455 
456  qla4xxx_post_ping_evt_work(ha, status, mrb->pid, data_size,
457  (uint8_t *) mbox_sts_entry->out_mbox);
458  break;
459 
460  default:
461  DEBUG2(ql4_printk(KERN_WARNING, ha, "%s: invalid mbox_cmd = "
462  "0x%x\n", __func__, mrb->mbox_cmd));
463  }
464 
465  kfree(mrb);
466  return;
467 }
468 
476 void qla4xxx_process_response_queue(struct scsi_qla_host *ha)
477 {
478  uint32_t count = 0;
479  struct srb *srb = NULL;
480  struct status_entry *sts_entry;
481 
482  /* Process all responses from response queue */
483  while ((ha->response_ptr->signature != RESPONSE_PROCESSED)) {
484  sts_entry = (struct status_entry *) ha->response_ptr;
485  count++;
486 
487  /* Advance pointers for next entry */
488  if (ha->response_out == (RESPONSE_QUEUE_DEPTH - 1)) {
489  ha->response_out = 0;
490  ha->response_ptr = ha->response_ring;
491  } else {
492  ha->response_out++;
493  ha->response_ptr++;
494  }
495 
496  /* process entry */
497  switch (sts_entry->hdr.entryType) {
498  case ET_STATUS:
499  /* Common status */
500  qla4xxx_status_entry(ha, sts_entry);
501  break;
502 
503  case ET_PASSTHRU_STATUS:
504  if (sts_entry->hdr.systemDefined == SD_ISCSI_PDU)
505  qla4xxx_passthru_status_entry(ha,
506  (struct passthru_status *)sts_entry);
507  else
508  ql4_printk(KERN_ERR, ha,
509  "%s: Invalid status received\n",
510  __func__);
511 
512  break;
513 
514  case ET_STATUS_CONTINUATION:
515  qla4xxx_status_cont_entry(ha,
516  (struct status_cont_entry *) sts_entry);
517  break;
518 
519  case ET_COMMAND:
520  /* ISP device queue is full. Command not
521  * accepted by ISP. Queue command for
522  * later */
523 
524  srb = qla4xxx_del_from_active_array(ha,
525  le32_to_cpu(sts_entry->
526  handle));
527  if (srb == NULL)
528  goto exit_prq_invalid_handle;
529 
530  DEBUG2(printk("scsi%ld: %s: FW device queue full, "
531  "srb %p\n", ha->host_no, __func__, srb));
532 
533  /* ETRY normally by sending it back with
534  * DID_BUS_BUSY */
535  srb->cmd->result = DID_BUS_BUSY << 16;
536  kref_put(&srb->srb_ref, qla4xxx_srb_compl);
537  break;
538 
539  case ET_CONTINUE:
540  /* Just throw away the continuation entries */
541  DEBUG2(printk("scsi%ld: %s: Continuation entry - "
542  "ignoring\n", ha->host_no, __func__));
543  break;
544 
545  case ET_MBOX_STATUS:
546  DEBUG2(ql4_printk(KERN_INFO, ha,
547  "%s: mbox status IOCB\n", __func__));
548  qla4xxx_mbox_status_entry(ha,
549  (struct mbox_status_iocb *)sts_entry);
550  break;
551 
552  default:
553  /*
554  * Invalid entry in response queue, reset RISC
555  * firmware.
556  */
557  DEBUG2(printk("scsi%ld: %s: Invalid entry %x in "
558  "response queue \n", ha->host_no,
559  __func__,
560  sts_entry->hdr.entryType));
561  goto exit_prq_error;
562  }
563  ((struct response *)sts_entry)->signature = RESPONSE_PROCESSED;
564  wmb();
565  }
566 
567  /*
568  * Tell ISP we're done with response(s). This also clears the interrupt.
569  */
570  ha->isp_ops->complete_iocb(ha);
571 
572  return;
573 
574 exit_prq_invalid_handle:
575  DEBUG2(printk("scsi%ld: %s: Invalid handle(srb)=%p type=%x IOCS=%x\n",
576  ha->host_no, __func__, srb, sts_entry->hdr.entryType,
577  sts_entry->completionStatus));
578 
579 exit_prq_error:
580  ha->isp_ops->complete_iocb(ha);
581  set_bit(DPC_RESET_HA, &ha->dpc_flags);
582 }
583 
592 static void qla4xxx_isr_decode_mailbox(struct scsi_qla_host * ha,
593  uint32_t mbox_status)
594 {
595  int i;
596  uint32_t mbox_sts[MBOX_AEN_REG_COUNT];
597  __le32 __iomem *mailbox_out;
598 
599  if (is_qla8032(ha))
600  mailbox_out = &ha->qla4_83xx_reg->mailbox_out[0];
601  else if (is_qla8022(ha))
602  mailbox_out = &ha->qla4_82xx_reg->mailbox_out[0];
603  else
604  mailbox_out = &ha->reg->mailbox[0];
605 
606  if ((mbox_status == MBOX_STS_BUSY) ||
607  (mbox_status == MBOX_STS_INTERMEDIATE_COMPLETION) ||
608  (mbox_status >> 12 == MBOX_COMPLETION_STATUS)) {
609  ha->mbox_status[0] = mbox_status;
610 
611  if (test_bit(AF_MBOX_COMMAND, &ha->flags)) {
612  /*
613  * Copy all mailbox registers to a temporary
614  * location and set mailbox command done flag
615  */
616  for (i = 0; i < ha->mbox_status_count; i++)
617  ha->mbox_status[i] = readl(&mailbox_out[i]);
618 
619  set_bit(AF_MBOX_COMMAND_DONE, &ha->flags);
620 
621  if (test_bit(AF_MBOX_COMMAND_NOPOLL, &ha->flags))
622  complete(&ha->mbx_intr_comp);
623  }
624  } else if (mbox_status >> 12 == MBOX_ASYNC_EVENT_STATUS) {
625  for (i = 0; i < MBOX_AEN_REG_COUNT; i++)
626  mbox_sts[i] = readl(&mailbox_out[i]);
627 
628  /* Immediately process the AENs that don't require much work.
629  * Only queue the database_changed AENs */
630  if (ha->aen_log.count < MAX_AEN_ENTRIES) {
631  for (i = 0; i < MBOX_AEN_REG_COUNT; i++)
632  ha->aen_log.entry[ha->aen_log.count].mbox_sts[i] =
633  mbox_sts[i];
634  ha->aen_log.count++;
635  }
636  switch (mbox_status) {
637  case MBOX_ASTS_SYSTEM_ERROR:
638  /* Log Mailbox registers */
639  ql4_printk(KERN_INFO, ha, "%s: System Err\n", __func__);
640  qla4xxx_dump_registers(ha);
641 
642  if ((is_qla8022(ha) && ql4xdontresethba) ||
643  (is_qla8032(ha) && qla4_83xx_idc_dontreset(ha))) {
644  DEBUG2(printk("scsi%ld: %s:Don't Reset HBA\n",
645  ha->host_no, __func__));
646  } else {
647  set_bit(AF_GET_CRASH_RECORD, &ha->flags);
648  set_bit(DPC_RESET_HA, &ha->dpc_flags);
649  }
650  break;
651 
652  case MBOX_ASTS_REQUEST_TRANSFER_ERROR:
653  case MBOX_ASTS_RESPONSE_TRANSFER_ERROR:
654  case MBOX_ASTS_NVRAM_INVALID:
655  case MBOX_ASTS_IP_ADDRESS_CHANGED:
656  case MBOX_ASTS_DHCP_LEASE_EXPIRED:
657  DEBUG2(printk("scsi%ld: AEN %04x, ERROR Status, "
658  "Reset HA\n", ha->host_no, mbox_status));
659  if (is_qla80XX(ha))
660  set_bit(DPC_RESET_HA_FW_CONTEXT,
661  &ha->dpc_flags);
662  else
663  set_bit(DPC_RESET_HA, &ha->dpc_flags);
664  break;
665 
666  case MBOX_ASTS_LINK_UP:
667  set_bit(AF_LINK_UP, &ha->flags);
668  if (test_bit(AF_INIT_DONE, &ha->flags))
669  set_bit(DPC_LINK_CHANGED, &ha->dpc_flags);
670 
671  ql4_printk(KERN_INFO, ha, "%s: LINK UP\n", __func__);
672  qla4xxx_post_aen_work(ha, ISCSI_EVENT_LINKUP,
673  sizeof(mbox_sts),
674  (uint8_t *) mbox_sts);
675  break;
676 
677  case MBOX_ASTS_LINK_DOWN:
678  clear_bit(AF_LINK_UP, &ha->flags);
679  if (test_bit(AF_INIT_DONE, &ha->flags))
680  set_bit(DPC_LINK_CHANGED, &ha->dpc_flags);
681 
682  ql4_printk(KERN_INFO, ha, "%s: LINK DOWN\n", __func__);
683  qla4xxx_post_aen_work(ha, ISCSI_EVENT_LINKDOWN,
684  sizeof(mbox_sts),
685  (uint8_t *) mbox_sts);
686  break;
687 
688  case MBOX_ASTS_HEARTBEAT:
689  ha->seconds_since_last_heartbeat = 0;
690  break;
691 
692  case MBOX_ASTS_DHCP_LEASE_ACQUIRED:
693  DEBUG2(printk("scsi%ld: AEN %04x DHCP LEASE "
694  "ACQUIRED\n", ha->host_no, mbox_status));
695  set_bit(DPC_GET_DHCP_IP_ADDR, &ha->dpc_flags);
696  break;
697 
698  case MBOX_ASTS_PROTOCOL_STATISTIC_ALARM:
699  case MBOX_ASTS_SCSI_COMMAND_PDU_REJECTED: /* Target
700  * mode
701  * only */
702  case MBOX_ASTS_UNSOLICITED_PDU_RECEIVED: /* Connection mode */
703  case MBOX_ASTS_IPSEC_SYSTEM_FATAL_ERROR:
704  case MBOX_ASTS_SUBNET_STATE_CHANGE:
705  case MBOX_ASTS_DUPLICATE_IP:
706  /* No action */
707  DEBUG2(printk("scsi%ld: AEN %04x\n", ha->host_no,
708  mbox_status));
709  break;
710 
711  case MBOX_ASTS_IP_ADDR_STATE_CHANGED:
712  printk("scsi%ld: AEN %04x, mbox_sts[2]=%04x, "
713  "mbox_sts[3]=%04x\n", ha->host_no, mbox_sts[0],
714  mbox_sts[2], mbox_sts[3]);
715 
716  /* mbox_sts[2] = Old ACB state
717  * mbox_sts[3] = new ACB state */
718  if ((mbox_sts[3] == ACB_STATE_VALID) &&
719  ((mbox_sts[2] == ACB_STATE_TENTATIVE) ||
720  (mbox_sts[2] == ACB_STATE_ACQUIRING)))
721  set_bit(DPC_GET_DHCP_IP_ADDR, &ha->dpc_flags);
722  else if ((mbox_sts[3] == ACB_STATE_ACQUIRING) &&
723  (mbox_sts[2] == ACB_STATE_VALID)) {
724  if (is_qla80XX(ha))
725  set_bit(DPC_RESET_HA_FW_CONTEXT,
726  &ha->dpc_flags);
727  else
728  set_bit(DPC_RESET_HA, &ha->dpc_flags);
729  } else if ((mbox_sts[3] == ACB_STATE_UNCONFIGURED))
730  complete(&ha->disable_acb_comp);
731  break;
732 
733  case MBOX_ASTS_MAC_ADDRESS_CHANGED:
734  case MBOX_ASTS_DNS:
735  /* No action */
736  DEBUG2(printk(KERN_INFO "scsi%ld: AEN %04x, "
737  "mbox_sts[1]=%04x, mbox_sts[2]=%04x\n",
738  ha->host_no, mbox_sts[0],
739  mbox_sts[1], mbox_sts[2]));
740  break;
741 
742  case MBOX_ASTS_SELF_TEST_FAILED:
743  case MBOX_ASTS_LOGIN_FAILED:
744  /* No action */
745  DEBUG2(printk("scsi%ld: AEN %04x, mbox_sts[1]=%04x, "
746  "mbox_sts[2]=%04x, mbox_sts[3]=%04x\n",
747  ha->host_no, mbox_sts[0], mbox_sts[1],
748  mbox_sts[2], mbox_sts[3]));
749  break;
750 
751  case MBOX_ASTS_DATABASE_CHANGED:
752  /* Queue AEN information and process it in the DPC
753  * routine */
754  if (ha->aen_q_count > 0) {
755 
756  /* decrement available counter */
757  ha->aen_q_count--;
758 
759  for (i = 0; i < MBOX_AEN_REG_COUNT; i++)
760  ha->aen_q[ha->aen_in].mbox_sts[i] =
761  mbox_sts[i];
762 
763  /* print debug message */
764  DEBUG2(printk("scsi%ld: AEN[%d] %04x queued "
765  "mb1:0x%x mb2:0x%x mb3:0x%x "
766  "mb4:0x%x mb5:0x%x\n",
767  ha->host_no, ha->aen_in,
768  mbox_sts[0], mbox_sts[1],
769  mbox_sts[2], mbox_sts[3],
770  mbox_sts[4], mbox_sts[5]));
771 
772  /* advance pointer */
773  ha->aen_in++;
774  if (ha->aen_in == MAX_AEN_ENTRIES)
775  ha->aen_in = 0;
776 
777  /* The DPC routine will process the aen */
778  set_bit(DPC_AEN, &ha->dpc_flags);
779  } else {
780  DEBUG2(printk("scsi%ld: %s: aen %04x, queue "
781  "overflowed! AEN LOST!!\n",
782  ha->host_no, __func__,
783  mbox_sts[0]));
784 
785  DEBUG2(printk("scsi%ld: DUMP AEN QUEUE\n",
786  ha->host_no));
787 
788  for (i = 0; i < MAX_AEN_ENTRIES; i++) {
789  DEBUG2(printk("AEN[%d] %04x %04x %04x "
790  "%04x\n", i, mbox_sts[0],
791  mbox_sts[1], mbox_sts[2],
792  mbox_sts[3]));
793  }
794  }
795  break;
796 
797  case MBOX_ASTS_TXSCVR_INSERTED:
798  DEBUG2(printk(KERN_WARNING
799  "scsi%ld: AEN %04x Transceiver"
800  " inserted\n", ha->host_no, mbox_sts[0]));
801  break;
802 
803  case MBOX_ASTS_TXSCVR_REMOVED:
804  DEBUG2(printk(KERN_WARNING
805  "scsi%ld: AEN %04x Transceiver"
806  " removed\n", ha->host_no, mbox_sts[0]));
807  break;
808 
809  case MBOX_ASTS_IDC_NOTIFY:
810  {
811  uint32_t opcode;
812  if (is_qla8032(ha)) {
813  DEBUG2(ql4_printk(KERN_INFO, ha,
814  "scsi%ld: AEN %04x, mbox_sts[1]=%08x, mbox_sts[2]=%08x, mbox_sts[3]=%08x, mbox_sts[4]=%08x\n",
815  ha->host_no, mbox_sts[0],
816  mbox_sts[1], mbox_sts[2],
817  mbox_sts[3], mbox_sts[4]));
818  opcode = mbox_sts[1] >> 16;
819  if ((opcode == MBOX_CMD_SET_PORT_CONFIG) ||
820  (opcode == MBOX_CMD_PORT_RESET)) {
821  set_bit(DPC_POST_IDC_ACK,
822  &ha->dpc_flags);
823  ha->idc_info.request_desc = mbox_sts[1];
824  ha->idc_info.info1 = mbox_sts[2];
825  ha->idc_info.info2 = mbox_sts[3];
826  ha->idc_info.info3 = mbox_sts[4];
827  qla4xxx_wake_dpc(ha);
828  }
829  }
830  break;
831  }
832 
833  case MBOX_ASTS_IDC_COMPLETE:
834  if (is_qla8032(ha)) {
835  DEBUG2(ql4_printk(KERN_INFO, ha,
836  "scsi%ld: AEN %04x, mbox_sts[1]=%08x, mbox_sts[2]=%08x, mbox_sts[3]=%08x, mbox_sts[4]=%08x\n",
837  ha->host_no, mbox_sts[0],
838  mbox_sts[1], mbox_sts[2],
839  mbox_sts[3], mbox_sts[4]));
840  DEBUG2(ql4_printk(KERN_INFO, ha,
841  "scsi:%ld: AEN %04x IDC Complete notification\n",
842  ha->host_no, mbox_sts[0]));
843  }
844  break;
845 
846  default:
847  DEBUG2(printk(KERN_WARNING
848  "scsi%ld: AEN %04x UNKNOWN\n",
849  ha->host_no, mbox_sts[0]));
850  break;
851  }
852  } else {
853  DEBUG2(printk("scsi%ld: Unknown mailbox status %08X\n",
854  ha->host_no, mbox_status));
855 
856  ha->mbox_status[0] = mbox_status;
857  }
858 }
859 
860 void qla4_83xx_interrupt_service_routine(struct scsi_qla_host *ha,
861  uint32_t intr_status)
862 {
863  /* Process mailbox/asynch event interrupt.*/
864  if (intr_status) {
865  qla4xxx_isr_decode_mailbox(ha,
866  readl(&ha->qla4_83xx_reg->mailbox_out[0]));
867  /* clear the interrupt */
868  writel(0, &ha->qla4_83xx_reg->risc_intr);
869  } else {
870  qla4xxx_process_response_queue(ha);
871  }
872 
873  /* clear the interrupt */
874  writel(0, &ha->qla4_83xx_reg->mb_int_mask);
875 }
876 
884 void qla4_82xx_interrupt_service_routine(struct scsi_qla_host *ha,
885  uint32_t intr_status)
886 {
887  /* Process response queue interrupt. */
888  if (intr_status & HSRX_RISC_IOCB_INT)
889  qla4xxx_process_response_queue(ha);
890 
891  /* Process mailbox/asynch event interrupt.*/
892  if (intr_status & HSRX_RISC_MB_INT)
893  qla4xxx_isr_decode_mailbox(ha,
894  readl(&ha->qla4_82xx_reg->mailbox_out[0]));
895 
896  /* clear the interrupt */
897  writel(0, &ha->qla4_82xx_reg->host_int);
898  readl(&ha->qla4_82xx_reg->host_int);
899 }
900 
908 void qla4xxx_interrupt_service_routine(struct scsi_qla_host * ha,
909  uint32_t intr_status)
910 {
911  /* Process response queue interrupt. */
912  if (intr_status & CSR_SCSI_COMPLETION_INTR)
913  qla4xxx_process_response_queue(ha);
914 
915  /* Process mailbox/asynch event interrupt.*/
916  if (intr_status & CSR_SCSI_PROCESSOR_INTR) {
917  qla4xxx_isr_decode_mailbox(ha,
918  readl(&ha->reg->mailbox[0]));
919 
920  /* Clear Mailbox Interrupt */
921  writel(set_rmask(CSR_SCSI_PROCESSOR_INTR),
922  &ha->reg->ctrl_status);
923  readl(&ha->reg->ctrl_status);
924  }
925 }
926 
933 static void qla4_82xx_spurious_interrupt(struct scsi_qla_host *ha,
934  uint8_t reqs_count)
935 {
936  if (reqs_count)
937  return;
938 
939  DEBUG2(ql4_printk(KERN_INFO, ha, "Spurious Interrupt\n"));
940  if (is_qla8022(ha)) {
941  writel(0, &ha->qla4_82xx_reg->host_int);
942  if (test_bit(AF_INTx_ENABLED, &ha->flags))
943  qla4_82xx_wr_32(ha, ha->nx_legacy_intr.tgt_mask_reg,
944  0xfbff);
945  }
946  ha->spurious_int_count++;
947 }
948 
954 irqreturn_t qla4xxx_intr_handler(int irq, void *dev_id)
955 {
956  struct scsi_qla_host *ha;
957  uint32_t intr_status;
958  unsigned long flags = 0;
959  uint8_t reqs_count = 0;
960 
961  ha = (struct scsi_qla_host *) dev_id;
962  if (!ha) {
963  DEBUG2(printk(KERN_INFO
964  "qla4xxx: Interrupt with NULL host ptr\n"));
965  return IRQ_NONE;
966  }
967 
968  spin_lock_irqsave(&ha->hardware_lock, flags);
969 
970  ha->isr_count++;
971  /*
972  * Repeatedly service interrupts up to a maximum of
973  * MAX_REQS_SERVICED_PER_INTR
974  */
975  while (1) {
976  /*
977  * Read interrupt status
978  */
979  if (ha->isp_ops->rd_shdw_rsp_q_in(ha) !=
980  ha->response_out)
981  intr_status = CSR_SCSI_COMPLETION_INTR;
982  else
983  intr_status = readl(&ha->reg->ctrl_status);
984 
985  if ((intr_status &
986  (CSR_SCSI_RESET_INTR|CSR_FATAL_ERROR|INTR_PENDING)) == 0) {
987  if (reqs_count == 0)
988  ha->spurious_int_count++;
989  break;
990  }
991 
992  if (intr_status & CSR_FATAL_ERROR) {
993  DEBUG2(printk(KERN_INFO "scsi%ld: Fatal Error, "
994  "Status 0x%04x\n", ha->host_no,
995  readl(isp_port_error_status (ha))));
996 
997  /* Issue Soft Reset to clear this error condition.
998  * This will prevent the RISC from repeatedly
999  * interrupting the driver; thus, allowing the DPC to
1000  * get scheduled to continue error recovery.
1001  * NOTE: Disabling RISC interrupts does not work in
1002  * this case, as CSR_FATAL_ERROR overrides
1003  * CSR_SCSI_INTR_ENABLE */
1004  if ((readl(&ha->reg->ctrl_status) &
1005  CSR_SCSI_RESET_INTR) == 0) {
1006  writel(set_rmask(CSR_SOFT_RESET),
1007  &ha->reg->ctrl_status);
1008  readl(&ha->reg->ctrl_status);
1009  }
1010 
1011  writel(set_rmask(CSR_FATAL_ERROR),
1012  &ha->reg->ctrl_status);
1013  readl(&ha->reg->ctrl_status);
1014 
1015  __qla4xxx_disable_intrs(ha);
1016 
1017  set_bit(DPC_RESET_HA, &ha->dpc_flags);
1018 
1019  break;
1020  } else if (intr_status & CSR_SCSI_RESET_INTR) {
1021  clear_bit(AF_ONLINE, &ha->flags);
1022  __qla4xxx_disable_intrs(ha);
1023 
1024  writel(set_rmask(CSR_SCSI_RESET_INTR),
1025  &ha->reg->ctrl_status);
1026  readl(&ha->reg->ctrl_status);
1027 
1028  if (!test_bit(AF_HA_REMOVAL, &ha->flags))
1029  set_bit(DPC_RESET_HA_INTR, &ha->dpc_flags);
1030 
1031  break;
1032  } else if (intr_status & INTR_PENDING) {
1033  ha->isp_ops->interrupt_service_routine(ha, intr_status);
1034  ha->total_io_count++;
1035  if (++reqs_count == MAX_REQS_SERVICED_PER_INTR)
1036  break;
1037  }
1038  }
1039 
1040  spin_unlock_irqrestore(&ha->hardware_lock, flags);
1041 
1042  return IRQ_HANDLED;
1043 }
1044 
1050 irqreturn_t qla4_82xx_intr_handler(int irq, void *dev_id)
1051 {
1052  struct scsi_qla_host *ha = dev_id;
1053  uint32_t intr_status;
1054  uint32_t status;
1055  unsigned long flags = 0;
1056  uint8_t reqs_count = 0;
1057 
1058  if (unlikely(pci_channel_offline(ha->pdev)))
1059  return IRQ_HANDLED;
1060 
1061  ha->isr_count++;
1062  status = qla4_82xx_rd_32(ha, ISR_INT_VECTOR);
1063  if (!(status & ha->nx_legacy_intr.int_vec_bit))
1064  return IRQ_NONE;
1065 
1066  status = qla4_82xx_rd_32(ha, ISR_INT_STATE_REG);
1067  if (!ISR_IS_LEGACY_INTR_TRIGGERED(status)) {
1068  DEBUG2(ql4_printk(KERN_INFO, ha,
1069  "%s legacy Int not triggered\n", __func__));
1070  return IRQ_NONE;
1071  }
1072 
1073  /* clear the interrupt */
1074  qla4_82xx_wr_32(ha, ha->nx_legacy_intr.tgt_status_reg, 0xffffffff);
1075 
1076  /* read twice to ensure write is flushed */
1077  qla4_82xx_rd_32(ha, ISR_INT_VECTOR);
1078  qla4_82xx_rd_32(ha, ISR_INT_VECTOR);
1079 
1080  spin_lock_irqsave(&ha->hardware_lock, flags);
1081  while (1) {
1082  if (!(readl(&ha->qla4_82xx_reg->host_int) &
1083  ISRX_82XX_RISC_INT)) {
1084  qla4_82xx_spurious_interrupt(ha, reqs_count);
1085  break;
1086  }
1087  intr_status = readl(&ha->qla4_82xx_reg->host_status);
1088  if ((intr_status &
1089  (HSRX_RISC_MB_INT | HSRX_RISC_IOCB_INT)) == 0) {
1090  qla4_82xx_spurious_interrupt(ha, reqs_count);
1091  break;
1092  }
1093 
1094  ha->isp_ops->interrupt_service_routine(ha, intr_status);
1095 
1096  /* Enable Interrupt */
1097  qla4_82xx_wr_32(ha, ha->nx_legacy_intr.tgt_mask_reg, 0xfbff);
1098 
1099  if (++reqs_count == MAX_REQS_SERVICED_PER_INTR)
1100  break;
1101  }
1102 
1103  spin_unlock_irqrestore(&ha->hardware_lock, flags);
1104  return IRQ_HANDLED;
1105 }
1106 
1107 #define LEG_INT_PTR_B31 (1 << 31)
1108 #define LEG_INT_PTR_B30 (1 << 30)
1109 #define PF_BITS_MASK (0xF << 16)
1110 
1116 irqreturn_t qla4_83xx_intr_handler(int irq, void *dev_id)
1117 {
1118  struct scsi_qla_host *ha = dev_id;
1119  uint32_t leg_int_ptr = 0;
1120  unsigned long flags = 0;
1121 
1122  ha->isr_count++;
1123  leg_int_ptr = readl(&ha->qla4_83xx_reg->leg_int_ptr);
1124 
1125  /* Legacy interrupt is valid if bit31 of leg_int_ptr is set */
1126  if (!(leg_int_ptr & LEG_INT_PTR_B31)) {
1127  ql4_printk(KERN_ERR, ha,
1128  "%s: Legacy Interrupt Bit 31 not set, spurious interrupt!\n",
1129  __func__);
1130  return IRQ_NONE;
1131  }
1132 
1133  /* Validate the PCIE function ID set in leg_int_ptr bits [19..16] */
1134  if ((leg_int_ptr & PF_BITS_MASK) != ha->pf_bit) {
1135  ql4_printk(KERN_ERR, ha,
1136  "%s: Incorrect function ID 0x%x in legacy interrupt register, ha->pf_bit = 0x%x\n",
1137  __func__, (leg_int_ptr & PF_BITS_MASK), ha->pf_bit);
1138  return IRQ_NONE;
1139  }
1140 
1141  /* To de-assert legacy interrupt, write 0 to Legacy Interrupt Trigger
1142  * Control register and poll till Legacy Interrupt Pointer register
1143  * bit30 is 0.
1144  */
1145  writel(0, &ha->qla4_83xx_reg->leg_int_trig);
1146  do {
1147  leg_int_ptr = readl(&ha->qla4_83xx_reg->leg_int_ptr);
1148  if ((leg_int_ptr & PF_BITS_MASK) != ha->pf_bit)
1149  break;
1150  } while (leg_int_ptr & LEG_INT_PTR_B30);
1151 
1152  spin_lock_irqsave(&ha->hardware_lock, flags);
1153  leg_int_ptr = readl(&ha->qla4_83xx_reg->risc_intr);
1154  ha->isp_ops->interrupt_service_routine(ha, leg_int_ptr);
1155  spin_unlock_irqrestore(&ha->hardware_lock, flags);
1156 
1157  return IRQ_HANDLED;
1158 }
1159 
1160 irqreturn_t
1161 qla4_8xxx_msi_handler(int irq, void *dev_id)
1162 {
1163  struct scsi_qla_host *ha;
1164 
1165  ha = (struct scsi_qla_host *) dev_id;
1166  if (!ha) {
1167  DEBUG2(printk(KERN_INFO
1168  "qla4xxx: MSIX: Interrupt with NULL host ptr\n"));
1169  return IRQ_NONE;
1170  }
1171 
1172  ha->isr_count++;
1173  /* clear the interrupt */
1174  qla4_82xx_wr_32(ha, ha->nx_legacy_intr.tgt_status_reg, 0xffffffff);
1175 
1176  /* read twice to ensure write is flushed */
1177  qla4_82xx_rd_32(ha, ISR_INT_VECTOR);
1178  qla4_82xx_rd_32(ha, ISR_INT_VECTOR);
1179 
1180  return qla4_8xxx_default_intr_handler(irq, dev_id);
1181 }
1182 
1183 static irqreturn_t qla4_83xx_mailbox_intr_handler(int irq, void *dev_id)
1184 {
1185  struct scsi_qla_host *ha = dev_id;
1186  unsigned long flags;
1187  uint32_t ival = 0;
1188 
1189  spin_lock_irqsave(&ha->hardware_lock, flags);
1190 
1191  ival = readl(&ha->qla4_83xx_reg->risc_intr);
1192  if (ival == 0) {
1193  ql4_printk(KERN_INFO, ha,
1194  "%s: It is a spurious mailbox interrupt!\n",
1195  __func__);
1196  ival = readl(&ha->qla4_83xx_reg->mb_int_mask);
1197  ival &= ~INT_MASK_FW_MB;
1198  writel(ival, &ha->qla4_83xx_reg->mb_int_mask);
1199  goto exit;
1200  }
1201 
1202  qla4xxx_isr_decode_mailbox(ha,
1203  readl(&ha->qla4_83xx_reg->mailbox_out[0]));
1204  writel(0, &ha->qla4_83xx_reg->risc_intr);
1205  ival = readl(&ha->qla4_83xx_reg->mb_int_mask);
1206  ival &= ~INT_MASK_FW_MB;
1207  writel(ival, &ha->qla4_83xx_reg->mb_int_mask);
1208  ha->isr_count++;
1209 exit:
1210  spin_unlock_irqrestore(&ha->hardware_lock, flags);
1211  return IRQ_HANDLED;
1212 }
1213 
1222 irqreturn_t
1223 qla4_8xxx_default_intr_handler(int irq, void *dev_id)
1224 {
1225  struct scsi_qla_host *ha = dev_id;
1226  unsigned long flags;
1227  uint32_t intr_status;
1228  uint8_t reqs_count = 0;
1229 
1230  if (is_qla8032(ha)) {
1231  qla4_83xx_mailbox_intr_handler(irq, dev_id);
1232  } else {
1233  spin_lock_irqsave(&ha->hardware_lock, flags);
1234  while (1) {
1235  if (!(readl(&ha->qla4_82xx_reg->host_int) &
1236  ISRX_82XX_RISC_INT)) {
1237  qla4_82xx_spurious_interrupt(ha, reqs_count);
1238  break;
1239  }
1240 
1241  intr_status = readl(&ha->qla4_82xx_reg->host_status);
1242  if ((intr_status &
1243  (HSRX_RISC_MB_INT | HSRX_RISC_IOCB_INT)) == 0) {
1244  qla4_82xx_spurious_interrupt(ha, reqs_count);
1245  break;
1246  }
1247 
1248  ha->isp_ops->interrupt_service_routine(ha, intr_status);
1249 
1250  if (++reqs_count == MAX_REQS_SERVICED_PER_INTR)
1251  break;
1252  }
1253  ha->isr_count++;
1254  spin_unlock_irqrestore(&ha->hardware_lock, flags);
1255  }
1256  return IRQ_HANDLED;
1257 }
1258 
1259 irqreturn_t
1260 qla4_8xxx_msix_rsp_q(int irq, void *dev_id)
1261 {
1262  struct scsi_qla_host *ha = dev_id;
1263  unsigned long flags;
1264  uint32_t ival = 0;
1265 
1266  spin_lock_irqsave(&ha->hardware_lock, flags);
1267  if (is_qla8032(ha)) {
1268  ival = readl(&ha->qla4_83xx_reg->iocb_int_mask);
1269  if (ival == 0) {
1270  ql4_printk(KERN_INFO, ha, "%s: It is a spurious iocb interrupt!\n",
1271  __func__);
1272  goto exit_msix_rsp_q;
1273  }
1274  qla4xxx_process_response_queue(ha);
1275  writel(0, &ha->qla4_83xx_reg->iocb_int_mask);
1276  } else {
1277  qla4xxx_process_response_queue(ha);
1278  writel(0, &ha->qla4_82xx_reg->host_int);
1279  }
1280  ha->isr_count++;
1281 exit_msix_rsp_q:
1282  spin_unlock_irqrestore(&ha->hardware_lock, flags);
1283  return IRQ_HANDLED;
1284 }
1285 
1297 void qla4xxx_process_aen(struct scsi_qla_host * ha, uint8_t process_aen)
1298 {
1299  uint32_t mbox_sts[MBOX_AEN_REG_COUNT];
1300  struct aen *aen;
1301  int i;
1302  unsigned long flags;
1303 
1304  spin_lock_irqsave(&ha->hardware_lock, flags);
1305  while (ha->aen_out != ha->aen_in) {
1306  aen = &ha->aen_q[ha->aen_out];
1307  /* copy aen information to local structure */
1308  for (i = 0; i < MBOX_AEN_REG_COUNT; i++)
1309  mbox_sts[i] = aen->mbox_sts[i];
1310 
1311  ha->aen_q_count++;
1312  ha->aen_out++;
1313 
1314  if (ha->aen_out == MAX_AEN_ENTRIES)
1315  ha->aen_out = 0;
1316 
1317  spin_unlock_irqrestore(&ha->hardware_lock, flags);
1318 
1319  DEBUG2(printk("qla4xxx(%ld): AEN[%d]=0x%08x, mbx1=0x%08x mbx2=0x%08x"
1320  " mbx3=0x%08x mbx4=0x%08x\n", ha->host_no,
1321  (ha->aen_out ? (ha->aen_out-1): (MAX_AEN_ENTRIES-1)),
1322  mbox_sts[0], mbox_sts[1], mbox_sts[2],
1323  mbox_sts[3], mbox_sts[4]));
1324 
1325  switch (mbox_sts[0]) {
1326  case MBOX_ASTS_DATABASE_CHANGED:
1327  switch (process_aen) {
1328  case FLUSH_DDB_CHANGED_AENS:
1329  DEBUG2(printk("scsi%ld: AEN[%d] %04x, index "
1330  "[%d] state=%04x FLUSHED!\n",
1331  ha->host_no, ha->aen_out,
1332  mbox_sts[0], mbox_sts[2],
1333  mbox_sts[3]));
1334  break;
1335  case PROCESS_ALL_AENS:
1336  default:
1337  /* Specific device. */
1338  if (mbox_sts[1] == 1)
1339  qla4xxx_process_ddb_changed(ha,
1340  mbox_sts[2], mbox_sts[3],
1341  mbox_sts[4]);
1342  break;
1343  }
1344  }
1345  spin_lock_irqsave(&ha->hardware_lock, flags);
1346  }
1347  spin_unlock_irqrestore(&ha->hardware_lock, flags);
1348 }
1349 
1350 int qla4xxx_request_irqs(struct scsi_qla_host *ha)
1351 {
1352  int ret;
1353 
1354  if (is_qla40XX(ha))
1355  goto try_intx;
1356 
1357  if (ql4xenablemsix == 2) {
1358  /* Note: MSI Interrupts not supported for ISP8324 */
1359  if (is_qla8032(ha)) {
1360  ql4_printk(KERN_INFO, ha, "%s: MSI Interrupts not supported for ISP8324, Falling back-to INTx mode\n",
1361  __func__);
1362  goto try_intx;
1363  }
1364  goto try_msi;
1365  }
1366 
1367  if (ql4xenablemsix == 0 || ql4xenablemsix != 1)
1368  goto try_intx;
1369 
1370  /* Trying MSI-X */
1371  ret = qla4_8xxx_enable_msix(ha);
1372  if (!ret) {
1373  DEBUG2(ql4_printk(KERN_INFO, ha,
1374  "MSI-X: Enabled (0x%X).\n", ha->revision_id));
1375  goto irq_attached;
1376  } else {
1377  if (is_qla8032(ha)) {
1378  ql4_printk(KERN_INFO, ha, "%s: ISP8324: MSI-X: Falling back-to INTx mode. ret = %d\n",
1379  __func__, ret);
1380  goto try_intx;
1381  }
1382  }
1383 
1384  ql4_printk(KERN_WARNING, ha,
1385  "MSI-X: Falling back-to MSI mode -- %d.\n", ret);
1386 
1387 try_msi:
1388  /* Trying MSI */
1389  ret = pci_enable_msi(ha->pdev);
1390  if (!ret) {
1391  ret = request_irq(ha->pdev->irq, qla4_8xxx_msi_handler,
1392  0, DRIVER_NAME, ha);
1393  if (!ret) {
1394  DEBUG2(ql4_printk(KERN_INFO, ha, "MSI: Enabled.\n"));
1395  set_bit(AF_MSI_ENABLED, &ha->flags);
1396  goto irq_attached;
1397  } else {
1398  ql4_printk(KERN_WARNING, ha,
1399  "MSI: Failed to reserve interrupt %d "
1400  "already in use.\n", ha->pdev->irq);
1401  pci_disable_msi(ha->pdev);
1402  }
1403  }
1404 
1405  /*
1406  * Prevent interrupts from falling back to INTx mode in cases where
1407  * interrupts cannot get acquired through MSI-X or MSI mode.
1408  */
1409  if (is_qla8022(ha)) {
1410  ql4_printk(KERN_WARNING, ha, "IRQ not attached -- %d.\n", ret);
1411  goto irq_not_attached;
1412  }
1413 try_intx:
1414  /* Trying INTx */
1415  ret = request_irq(ha->pdev->irq, ha->isp_ops->intr_handler,
1416  IRQF_SHARED, DRIVER_NAME, ha);
1417  if (!ret) {
1418  DEBUG2(ql4_printk(KERN_INFO, ha, "INTx: Enabled.\n"));
1419  set_bit(AF_INTx_ENABLED, &ha->flags);
1420  goto irq_attached;
1421 
1422  } else {
1423  ql4_printk(KERN_WARNING, ha,
1424  "INTx: Failed to reserve interrupt %d already in"
1425  " use.\n", ha->pdev->irq);
1426  goto irq_not_attached;
1427  }
1428 
1429 irq_attached:
1430  set_bit(AF_IRQ_ATTACHED, &ha->flags);
1431  ha->host->irq = ha->pdev->irq;
1432  ql4_printk(KERN_INFO, ha, "%s: irq %d attached\n",
1433  __func__, ha->pdev->irq);
1434 irq_not_attached:
1435  return ret;
1436 }
1437 
1438 void qla4xxx_free_irqs(struct scsi_qla_host *ha)
1439 {
1440  if (test_bit(AF_MSIX_ENABLED, &ha->flags))
1441  qla4_8xxx_disable_msix(ha);
1442  else if (test_and_clear_bit(AF_MSI_ENABLED, &ha->flags)) {
1443  free_irq(ha->pdev->irq, ha);
1444  pci_disable_msi(ha->pdev);
1445  } else if (test_and_clear_bit(AF_INTx_ENABLED, &ha->flags))
1446  free_irq(ha->pdev->irq, ha);
1447 }
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