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Add linux-next specific files for 20110831
[linux-2.6/next.git] / drivers / scsi / qla4xxx / ql4_isr.c
blob827e93078b942bbcbc393ac8f063c8ce4ab8b183
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 DEBUG2(ql4_printk(KERN_INFO, ha, "scsi%ld:%d:%d:%d: %s:"
30 " sense len 0\n", ha->host_no,
31 cmd->device->channel, cmd->device->id,
32 cmd->device->lun, __func__));
33 ha->status_srb = NULL;
34 return;
35 }
36 /* Save total available sense length,
37 * not to exceed cmd's sense buffer size */
38 sense_len = min_t(uint16_t, sense_len, SCSI_SENSE_BUFFERSIZE);
39 srb->req_sense_ptr = cmd->sense_buffer;
40 srb->req_sense_len = sense_len;
41
42 /* Copy sense from sts_entry pkt */
43 sense_len = min_t(uint16_t, sense_len, IOCB_MAX_SENSEDATA_LEN);
44 memcpy(cmd->sense_buffer, sts_entry->senseData, sense_len);
45
46 DEBUG2(printk(KERN_INFO "scsi%ld:%d:%d:%d: %s: sense key = %x, "
47 "ASL= %02x, ASC/ASCQ = %02x/%02x\n", ha->host_no,
48 cmd->device->channel, cmd->device->id,
49 cmd->device->lun, __func__,
50 sts_entry->senseData[2] & 0x0f,
51 sts_entry->senseData[7],
52 sts_entry->senseData[12],
53 sts_entry->senseData[13]));
54
55 DEBUG5(qla4xxx_dump_buffer(cmd->sense_buffer, sense_len));
56 srb->flags |= SRB_GOT_SENSE;
57
58 /* Update srb, in case a sts_cont pkt follows */
59 srb->req_sense_ptr += sense_len;
60 srb->req_sense_len -= sense_len;
61 if (srb->req_sense_len != 0)
62 ha->status_srb = srb;
63 else
64 ha->status_srb = NULL;
65 }
66
67 /**
68 * qla4xxx_status_cont_entry - Process a Status Continuations entry.
69 * @ha: SCSI driver HA context
70 * @sts_cont: Entry pointer
71 *
72 * Extended sense data.
73 */
74 static void
75 qla4xxx_status_cont_entry(struct scsi_qla_host *ha,
76 struct status_cont_entry *sts_cont)
77 {
78 struct srb *srb = ha->status_srb;
79 struct scsi_cmnd *cmd;
80 uint16_t sense_len;
81
82 if (srb == NULL)
83 return;
84
85 cmd = srb->cmd;
86 if (cmd == NULL) {
87 DEBUG2(printk(KERN_INFO "scsi%ld: %s: Cmd already returned "
88 "back to OS srb=%p srb->state:%d\n", ha->host_no,
89 __func__, srb, srb->state));
90 ha->status_srb = NULL;
91 return;
92 }
93
94 /* Copy sense data. */
95 sense_len = min_t(uint16_t, srb->req_sense_len,
96 IOCB_MAX_EXT_SENSEDATA_LEN);
97 memcpy(srb->req_sense_ptr, sts_cont->ext_sense_data, sense_len);
98 DEBUG5(qla4xxx_dump_buffer(srb->req_sense_ptr, sense_len));
99
100 srb->req_sense_ptr += sense_len;
101 srb->req_sense_len -= sense_len;
102
103 /* Place command on done queue. */
104 if (srb->req_sense_len == 0) {
105 kref_put(&srb->srb_ref, qla4xxx_srb_compl);
106 ha->status_srb = NULL;
107 }
108 }
109
110 /**
111 * qla4xxx_status_entry - processes status IOCBs
112 * @ha: Pointer to host adapter structure.
113 * @sts_entry: Pointer to status entry structure.
114 **/
115 static void qla4xxx_status_entry(struct scsi_qla_host *ha,
116 struct status_entry *sts_entry)
117 {
118 uint8_t scsi_status;
119 struct scsi_cmnd *cmd;
120 struct srb *srb;
121 struct ddb_entry *ddb_entry;
122 uint32_t residual;
123
124 srb = qla4xxx_del_from_active_array(ha, le32_to_cpu(sts_entry->handle));
125 if (!srb) {
126 DEBUG2(printk(KERN_WARNING "scsi%ld: %s: Status Entry invalid "
127 "handle 0x%x, sp=%p. This cmd may have already "
128 "been completed.\n", ha->host_no, __func__,
129 le32_to_cpu(sts_entry->handle), srb));
130 ql4_printk(KERN_WARNING, ha, "%s invalid status entry:"
131 " handle=0x%0x\n", __func__, sts_entry->handle);
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 /*
247 * If there is scsi_status, it takes precedense over
248 * underflow condition.
249 */
250 if (scsi_status != 0) {
251 cmd->result = DID_OK << 16 | scsi_status;
252
253 if (scsi_status != SCSI_CHECK_CONDITION)
254 break;
255
256 /* Copy Sense Data into sense buffer. */
257 qla4xxx_copy_sense(ha, sts_entry, srb);
258 } else {
259 /*
260 * If RISC reports underrun and target does not
261 * report it then we must have a lost frame, so
262 * tell upper layer to retry it by reporting a
263 * bus busy.
264 */
265 if ((sts_entry->iscsiFlags &
266 ISCSI_FLAG_RESIDUAL_UNDER) == 0) {
267 cmd->result = DID_BUS_BUSY << 16;
268 } else if ((scsi_bufflen(cmd) - residual) <
269 cmd->underflow) {
270 /*
271 * Handle mid-layer underflow???
272 *
273 * For kernels less than 2.4, the driver must
274 * return an error if an underflow is detected.
275 * For kernels equal-to and above 2.4, the
276 * mid-layer will appearantly handle the
277 * underflow by detecting the residual count --
278 * unfortunately, we do not see where this is
279 * actually being done. In the interim, we
280 * will return DID_ERROR.
281 */
282 DEBUG2(printk("scsi%ld:%d:%d:%d: %s: "
283 "Mid-layer Data underrun1, "
284 "xferlen = 0x%x, "
285 "residual = 0x%x\n", ha->host_no,
286 cmd->device->channel,
287 cmd->device->id,
288 cmd->device->lun, __func__,
289 scsi_bufflen(cmd), residual));
290
291 cmd->result = DID_ERROR << 16;
292 } else {
293 cmd->result = DID_OK << 16;
294 }
295 }
296 break;
297
298 case SCS_DEVICE_LOGGED_OUT:
299 case SCS_DEVICE_UNAVAILABLE:
300 DEBUG2(printk(KERN_INFO "scsi%ld:%d:%d:%d: SCS_DEVICE "
301 "state: 0x%x\n", ha->host_no,
302 cmd->device->channel, cmd->device->id,
303 cmd->device->lun, sts_entry->completionStatus));
304 /*
305 * Mark device missing so that we won't continue to
306 * send I/O to this device. We should get a ddb
307 * state change AEN soon.
308 */
309 if (iscsi_is_session_online(ddb_entry->sess))
310 qla4xxx_mark_device_missing(ddb_entry->sess);
311
312 cmd->result = DID_TRANSPORT_DISRUPTED << 16;
313 break;
314
315 case SCS_QUEUE_FULL:
316 /*
317 * SCSI Mid-Layer handles device queue full
318 */
319 cmd->result = DID_OK << 16 | sts_entry->scsiStatus;
320 DEBUG2(printk("scsi%ld:%d:%d: %s: QUEUE FULL detected "
321 "compl=%02x, scsi=%02x, state=%02x, iFlags=%02x,"
322 " iResp=%02x\n", ha->host_no, cmd->device->id,
323 cmd->device->lun, __func__,
324 sts_entry->completionStatus,
325 sts_entry->scsiStatus, sts_entry->state_flags,
326 sts_entry->iscsiFlags,
327 sts_entry->iscsiResponse));
328 break;
329
330 default:
331 cmd->result = DID_ERROR << 16;
332 break;
333 }
334
335 status_entry_exit:
336
337 /* complete the request, if not waiting for status_continuation pkt */
338 srb->cc_stat = sts_entry->completionStatus;
339 if (ha->status_srb == NULL)
340 kref_put(&srb->srb_ref, qla4xxx_srb_compl);
341 }
342
343 /**
344 * qla4xxx_passthru_status_entry - processes passthru status IOCBs (0x3C)
345 * @ha: Pointer to host adapter structure.
346 * @sts_entry: Pointer to status entry structure.
347 **/
348 static void qla4xxx_passthru_status_entry(struct scsi_qla_host *ha,
349 struct passthru_status *sts_entry)
350 {
351 struct iscsi_task *task;
352 struct ddb_entry *ddb_entry;
353 struct ql4_task_data *task_data;
354 struct iscsi_cls_conn *cls_conn;
355 struct iscsi_conn *conn;
356 itt_t itt;
357 uint32_t fw_ddb_index;
358
359 itt = sts_entry->handle;
360 fw_ddb_index = le32_to_cpu(sts_entry->target);
361
362 ddb_entry = qla4xxx_lookup_ddb_by_fw_index(ha, fw_ddb_index);
363
364 if (ddb_entry == NULL) {
365 ql4_printk(KERN_ERR, ha, "%s: Invalid target index = 0x%x\n",
366 __func__, sts_entry->target);
367 return;
368 }
369
370 cls_conn = ddb_entry->conn;
371 conn = cls_conn->dd_data;
372 spin_lock(&conn->session->lock);
373 task = iscsi_itt_to_task(conn, itt);
374 spin_unlock(&conn->session->lock);
375
376 if (task == NULL) {
377 ql4_printk(KERN_ERR, ha, "%s: Task is NULL\n", __func__);
378 return;
379 }
380
381 task_data = task->dd_data;
382 memcpy(&task_data->sts, sts_entry, sizeof(struct passthru_status));
383 ha->req_q_count += task_data->iocb_req_cnt;
384 ha->iocb_cnt -= task_data->iocb_req_cnt;
385 queue_work(ha->task_wq, &task_data->task_work);
386 }
387
388 /**
389 * qla4xxx_process_response_queue - process response queue completions
390 * @ha: Pointer to host adapter structure.
391 *
392 * This routine process response queue completions in interrupt context.
393 * Hardware_lock locked upon entry
394 **/
395 void qla4xxx_process_response_queue(struct scsi_qla_host *ha)
396 {
397 uint32_t count = 0;
398 struct srb *srb = NULL;
399 struct status_entry *sts_entry;
400
401 /* Process all responses from response queue */
402 while ((ha->response_ptr->signature != RESPONSE_PROCESSED)) {
403 sts_entry = (struct status_entry *) ha->response_ptr;
404 count++;
405
406 /* Advance pointers for next entry */
407 if (ha->response_out == (RESPONSE_QUEUE_DEPTH - 1)) {
408 ha->response_out = 0;
409 ha->response_ptr = ha->response_ring;
410 } else {
411 ha->response_out++;
412 ha->response_ptr++;
413 }
414
415 /* process entry */
416 switch (sts_entry->hdr.entryType) {
417 case ET_STATUS:
418 /* Common status */
419 qla4xxx_status_entry(ha, sts_entry);
420 break;
421
422 case ET_PASSTHRU_STATUS:
423 if (sts_entry->hdr.systemDefined == SD_ISCSI_PDU)
424 qla4xxx_passthru_status_entry(ha,
425 (struct passthru_status *)sts_entry);
426 else
427 ql4_printk(KERN_ERR, ha,
428 "%s: Invalid status received\n",
429 __func__);
430
431 break;
432
433 case ET_STATUS_CONTINUATION:
434 qla4xxx_status_cont_entry(ha,
435 (struct status_cont_entry *) sts_entry);
436 break;
437
438 case ET_COMMAND:
439 /* ISP device queue is full. Command not
440 * accepted by ISP. Queue command for
441 * later */
442
443 srb = qla4xxx_del_from_active_array(ha,
444 le32_to_cpu(sts_entry->
445 handle));
446 if (srb == NULL)
447 goto exit_prq_invalid_handle;
448
449 DEBUG2(printk("scsi%ld: %s: FW device queue full, "
450 "srb %p\n", ha->host_no, __func__, srb));
451
452 /* ETRY normally by sending it back with
453 * DID_BUS_BUSY */
454 srb->cmd->result = DID_BUS_BUSY << 16;
455 kref_put(&srb->srb_ref, qla4xxx_srb_compl);
456 break;
457
458 case ET_CONTINUE:
459 /* Just throw away the continuation entries */
460 DEBUG2(printk("scsi%ld: %s: Continuation entry - "
461 "ignoring\n", ha->host_no, __func__));
462 break;
463
464 default:
465 /*
466 * Invalid entry in response queue, reset RISC
467 * firmware.
468 */
469 DEBUG2(printk("scsi%ld: %s: Invalid entry %x in "
470 "response queue \n", ha->host_no,
471 __func__,
472 sts_entry->hdr.entryType));
473 goto exit_prq_error;
474 }
475 ((struct response *)sts_entry)->signature = RESPONSE_PROCESSED;
476 wmb();
477 }
478
479 /*
480 * Tell ISP we're done with response(s). This also clears the interrupt.
481 */
482 ha->isp_ops->complete_iocb(ha);
483
484 return;
485
486 exit_prq_invalid_handle:
487 DEBUG2(printk("scsi%ld: %s: Invalid handle(srb)=%p type=%x IOCS=%x\n",
488 ha->host_no, __func__, srb, sts_entry->hdr.entryType,
489 sts_entry->completionStatus));
490
491 exit_prq_error:
492 ha->isp_ops->complete_iocb(ha);
493 set_bit(DPC_RESET_HA, &ha->dpc_flags);
494 }
495
496 /**
497 * qla4xxx_isr_decode_mailbox - decodes mailbox status
498 * @ha: Pointer to host adapter structure.
499 * @mailbox_status: Mailbox status.
500 *
501 * This routine decodes the mailbox status during the ISR.
502 * Hardware_lock locked upon entry. runs in interrupt context.
503 **/
504 static void qla4xxx_isr_decode_mailbox(struct scsi_qla_host * ha,
505 uint32_t mbox_status)
506 {
507 int i;
508 uint32_t mbox_sts[MBOX_AEN_REG_COUNT];
509
510 if ((mbox_status == MBOX_STS_BUSY) ||
511 (mbox_status == MBOX_STS_INTERMEDIATE_COMPLETION) ||
512 (mbox_status >> 12 == MBOX_COMPLETION_STATUS)) {
513 ha->mbox_status[0] = mbox_status;
514
515 if (test_bit(AF_MBOX_COMMAND, &ha->flags)) {
516 /*
517 * Copy all mailbox registers to a temporary
518 * location and set mailbox command done flag
519 */
520 for (i = 0; i < ha->mbox_status_count; i++)
521 ha->mbox_status[i] = is_qla8022(ha)
522 ? readl(&ha->qla4_8xxx_reg->mailbox_out[i])
523 : readl(&ha->reg->mailbox[i]);
524
525 set_bit(AF_MBOX_COMMAND_DONE, &ha->flags);
526
527 if (test_bit(AF_MBOX_COMMAND_NOPOLL, &ha->flags))
528 complete(&ha->mbx_intr_comp);
529 }
530 } else if (mbox_status >> 12 == MBOX_ASYNC_EVENT_STATUS) {
531 for (i = 0; i < MBOX_AEN_REG_COUNT; i++)
532 mbox_sts[i] = is_qla8022(ha)
533 ? readl(&ha->qla4_8xxx_reg->mailbox_out[i])
534 : readl(&ha->reg->mailbox[i]);
535
536 /* Immediately process the AENs that don't require much work.
537 * Only queue the database_changed AENs */
538 if (ha->aen_log.count < MAX_AEN_ENTRIES) {
539 for (i = 0; i < MBOX_AEN_REG_COUNT; i++)
540 ha->aen_log.entry[ha->aen_log.count].mbox_sts[i] =
541 mbox_sts[i];
542 ha->aen_log.count++;
543 }
544 switch (mbox_status) {
545 case MBOX_ASTS_SYSTEM_ERROR:
546 /* Log Mailbox registers */
547 ql4_printk(KERN_INFO, ha, "%s: System Err\n", __func__);
548 qla4xxx_dump_registers(ha);
549
550 if (ql4xdontresethba) {
551 DEBUG2(printk("scsi%ld: %s:Don't Reset HBA\n",
552 ha->host_no, __func__));
553 } else {
554 set_bit(AF_GET_CRASH_RECORD, &ha->flags);
555 set_bit(DPC_RESET_HA, &ha->dpc_flags);
556 }
557 break;
558
559 case MBOX_ASTS_REQUEST_TRANSFER_ERROR:
560 case MBOX_ASTS_RESPONSE_TRANSFER_ERROR:
561 case MBOX_ASTS_NVRAM_INVALID:
562 case MBOX_ASTS_IP_ADDRESS_CHANGED:
563 case MBOX_ASTS_DHCP_LEASE_EXPIRED:
564 DEBUG2(printk("scsi%ld: AEN %04x, ERROR Status, "
565 "Reset HA\n", ha->host_no, mbox_status));
566 set_bit(DPC_RESET_HA, &ha->dpc_flags);
567 break;
568
569 case MBOX_ASTS_LINK_UP:
570 set_bit(AF_LINK_UP, &ha->flags);
571 if (test_bit(AF_INIT_DONE, &ha->flags))
572 set_bit(DPC_LINK_CHANGED, &ha->dpc_flags);
573
574 ql4_printk(KERN_INFO, ha, "%s: LINK UP\n", __func__);
575 break;
576
577 case MBOX_ASTS_LINK_DOWN:
578 clear_bit(AF_LINK_UP, &ha->flags);
579 if (test_bit(AF_INIT_DONE, &ha->flags))
580 set_bit(DPC_LINK_CHANGED, &ha->dpc_flags);
581
582 ql4_printk(KERN_INFO, ha, "%s: LINK DOWN\n", __func__);
583 break;
584
585 case MBOX_ASTS_HEARTBEAT:
586 ha->seconds_since_last_heartbeat = 0;
587 break;
588
589 case MBOX_ASTS_DHCP_LEASE_ACQUIRED:
590 DEBUG2(printk("scsi%ld: AEN %04x DHCP LEASE "
591 "ACQUIRED\n", ha->host_no, mbox_status));
592 set_bit(DPC_GET_DHCP_IP_ADDR, &ha->dpc_flags);
593 break;
594
595 case MBOX_ASTS_PROTOCOL_STATISTIC_ALARM:
596 case MBOX_ASTS_SCSI_COMMAND_PDU_REJECTED: /* Target
597 * mode
598 * only */
599 case MBOX_ASTS_UNSOLICITED_PDU_RECEIVED: /* Connection mode */
600 case MBOX_ASTS_IPSEC_SYSTEM_FATAL_ERROR:
601 case MBOX_ASTS_SUBNET_STATE_CHANGE:
602 case MBOX_ASTS_DUPLICATE_IP:
603 /* No action */
604 DEBUG2(printk("scsi%ld: AEN %04x\n", ha->host_no,
605 mbox_status));
606 break;
607
608 case MBOX_ASTS_IP_ADDR_STATE_CHANGED:
609 printk("scsi%ld: AEN %04x, mbox_sts[2]=%04x, "
610 "mbox_sts[3]=%04x\n", ha->host_no, mbox_sts[0],
611 mbox_sts[2], mbox_sts[3]);
612
613 /* mbox_sts[2] = Old ACB state
614 * mbox_sts[3] = new ACB state */
615 if ((mbox_sts[3] == ACB_STATE_VALID) &&
616 ((mbox_sts[2] == ACB_STATE_TENTATIVE) ||
617 (mbox_sts[2] == ACB_STATE_ACQUIRING)))
618 set_bit(DPC_GET_DHCP_IP_ADDR, &ha->dpc_flags);
619 else if ((mbox_sts[3] == ACB_STATE_ACQUIRING) &&
620 (mbox_sts[2] == ACB_STATE_VALID))
621 set_bit(DPC_RESET_HA, &ha->dpc_flags);
622 else if ((mbox_sts[3] == ACB_STATE_UNCONFIGURED))
623 complete(&ha->disable_acb_comp);
624 break;
625
626 case MBOX_ASTS_MAC_ADDRESS_CHANGED:
627 case MBOX_ASTS_DNS:
628 /* No action */
629 DEBUG2(printk(KERN_INFO "scsi%ld: AEN %04x, "
630 "mbox_sts[1]=%04x, mbox_sts[2]=%04x\n",
631 ha->host_no, mbox_sts[0],
632 mbox_sts[1], mbox_sts[2]));
633 break;
634
635 case MBOX_ASTS_SELF_TEST_FAILED:
636 case MBOX_ASTS_LOGIN_FAILED:
637 /* No action */
638 DEBUG2(printk("scsi%ld: AEN %04x, mbox_sts[1]=%04x, "
639 "mbox_sts[2]=%04x, mbox_sts[3]=%04x\n",
640 ha->host_no, mbox_sts[0], mbox_sts[1],
641 mbox_sts[2], mbox_sts[3]));
642 break;
643
644 case MBOX_ASTS_DATABASE_CHANGED:
645 /* Queue AEN information and process it in the DPC
646 * routine */
647 if (ha->aen_q_count > 0) {
648
649 /* decrement available counter */
650 ha->aen_q_count--;
651
652 for (i = 0; i < MBOX_AEN_REG_COUNT; i++)
653 ha->aen_q[ha->aen_in].mbox_sts[i] =
654 mbox_sts[i];
655
656 /* print debug message */
657 DEBUG2(printk("scsi%ld: AEN[%d] %04x queued "
658 "mb1:0x%x mb2:0x%x mb3:0x%x "
659 "mb4:0x%x mb5:0x%x\n",
660 ha->host_no, ha->aen_in,
661 mbox_sts[0], mbox_sts[1],
662 mbox_sts[2], mbox_sts[3],
663 mbox_sts[4], mbox_sts[5]));
664
665 /* advance pointer */
666 ha->aen_in++;
667 if (ha->aen_in == MAX_AEN_ENTRIES)
668 ha->aen_in = 0;
669
670 /* The DPC routine will process the aen */
671 set_bit(DPC_AEN, &ha->dpc_flags);
672 } else {
673 DEBUG2(printk("scsi%ld: %s: aen %04x, queue "
674 "overflowed! AEN LOST!!\n",
675 ha->host_no, __func__,
676 mbox_sts[0]));
677
678 DEBUG2(printk("scsi%ld: DUMP AEN QUEUE\n",
679 ha->host_no));
680
681 for (i = 0; i < MAX_AEN_ENTRIES; i++) {
682 DEBUG2(printk("AEN[%d] %04x %04x %04x "
683 "%04x\n", i, mbox_sts[0],
684 mbox_sts[1], mbox_sts[2],
685 mbox_sts[3]));
686 }
687 }
688 break;
689
690 case MBOX_ASTS_TXSCVR_INSERTED:
691 DEBUG2(printk(KERN_WARNING
692 "scsi%ld: AEN %04x Transceiver"
693 " inserted\n", ha->host_no, mbox_sts[0]));
694 break;
695
696 case MBOX_ASTS_TXSCVR_REMOVED:
697 DEBUG2(printk(KERN_WARNING
698 "scsi%ld: AEN %04x Transceiver"
699 " removed\n", ha->host_no, mbox_sts[0]));
700 break;
701
702 default:
703 DEBUG2(printk(KERN_WARNING
704 "scsi%ld: AEN %04x UNKNOWN\n",
705 ha->host_no, mbox_sts[0]));
706 break;
707 }
708 } else {
709 DEBUG2(printk("scsi%ld: Unknown mailbox status %08X\n",
710 ha->host_no, mbox_status));
711
712 ha->mbox_status[0] = mbox_status;
713 }
714 }
715
716 /**
717 * qla4_8xxx_interrupt_service_routine - isr
718 * @ha: pointer to host adapter structure.
719 *
720 * This is the main interrupt service routine.
721 * hardware_lock locked upon entry. runs in interrupt context.
722 **/
723 void qla4_8xxx_interrupt_service_routine(struct scsi_qla_host *ha,
724 uint32_t intr_status)
725 {
726 /* Process response queue interrupt. */
727 if (intr_status & HSRX_RISC_IOCB_INT)
728 qla4xxx_process_response_queue(ha);
729
730 /* Process mailbox/asynch event interrupt.*/
731 if (intr_status & HSRX_RISC_MB_INT)
732 qla4xxx_isr_decode_mailbox(ha,
733 readl(&ha->qla4_8xxx_reg->mailbox_out[0]));
734
735 /* clear the interrupt */
736 writel(0, &ha->qla4_8xxx_reg->host_int);
737 readl(&ha->qla4_8xxx_reg->host_int);
738 }
739
740 /**
741 * qla4xxx_interrupt_service_routine - isr
742 * @ha: pointer to host adapter structure.
743 *
744 * This is the main interrupt service routine.
745 * hardware_lock locked upon entry. runs in interrupt context.
746 **/
747 void qla4xxx_interrupt_service_routine(struct scsi_qla_host * ha,
748 uint32_t intr_status)
749 {
750 /* Process response queue interrupt. */
751 if (intr_status & CSR_SCSI_COMPLETION_INTR)
752 qla4xxx_process_response_queue(ha);
753
754 /* Process mailbox/asynch event interrupt.*/
755 if (intr_status & CSR_SCSI_PROCESSOR_INTR) {
756 qla4xxx_isr_decode_mailbox(ha,
757 readl(&ha->reg->mailbox[0]));
758
759 /* Clear Mailbox Interrupt */
760 writel(set_rmask(CSR_SCSI_PROCESSOR_INTR),
761 &ha->reg->ctrl_status);
762 readl(&ha->reg->ctrl_status);
763 }
764 }
765
766 /**
767 * qla4_8xxx_spurious_interrupt - processes spurious interrupt
768 * @ha: pointer to host adapter structure.
769 * @reqs_count: .
770 *
771 **/
772 static void qla4_8xxx_spurious_interrupt(struct scsi_qla_host *ha,
773 uint8_t reqs_count)
774 {
775 if (reqs_count)
776 return;
777
778 DEBUG2(ql4_printk(KERN_INFO, ha, "Spurious Interrupt\n"));
779 if (is_qla8022(ha)) {
780 writel(0, &ha->qla4_8xxx_reg->host_int);
781 if (test_bit(AF_INTx_ENABLED, &ha->flags))
782 qla4_8xxx_wr_32(ha, ha->nx_legacy_intr.tgt_mask_reg,
783 0xfbff);
784 }
785 ha->spurious_int_count++;
786 }
787
788 /**
789 * qla4xxx_intr_handler - hardware interrupt handler.
790 * @irq: Unused
791 * @dev_id: Pointer to host adapter structure
792 **/
793 irqreturn_t qla4xxx_intr_handler(int irq, void *dev_id)
794 {
795 struct scsi_qla_host *ha;
796 uint32_t intr_status;
797 unsigned long flags = 0;
798 uint8_t reqs_count = 0;
799
800 ha = (struct scsi_qla_host *) dev_id;
801 if (!ha) {
802 DEBUG2(printk(KERN_INFO
803 "qla4xxx: Interrupt with NULL host ptr\n"));
804 return IRQ_NONE;
805 }
806
807 spin_lock_irqsave(&ha->hardware_lock, flags);
808
809 ha->isr_count++;
810 /*
811 * Repeatedly service interrupts up to a maximum of
812 * MAX_REQS_SERVICED_PER_INTR
813 */
814 while (1) {
815 /*
816 * Read interrupt status
817 */
818 if (ha->isp_ops->rd_shdw_rsp_q_in(ha) !=
819 ha->response_out)
820 intr_status = CSR_SCSI_COMPLETION_INTR;
821 else
822 intr_status = readl(&ha->reg->ctrl_status);
823
824 if ((intr_status &
825 (CSR_SCSI_RESET_INTR|CSR_FATAL_ERROR|INTR_PENDING)) == 0) {
826 if (reqs_count == 0)
827 ha->spurious_int_count++;
828 break;
829 }
830
831 if (intr_status & CSR_FATAL_ERROR) {
832 DEBUG2(printk(KERN_INFO "scsi%ld: Fatal Error, "
833 "Status 0x%04x\n", ha->host_no,
834 readl(isp_port_error_status (ha))));
835
836 /* Issue Soft Reset to clear this error condition.
837 * This will prevent the RISC from repeatedly
838 * interrupting the driver; thus, allowing the DPC to
839 * get scheduled to continue error recovery.
840 * NOTE: Disabling RISC interrupts does not work in
841 * this case, as CSR_FATAL_ERROR overrides
842 * CSR_SCSI_INTR_ENABLE */
843 if ((readl(&ha->reg->ctrl_status) &
844 CSR_SCSI_RESET_INTR) == 0) {
845 writel(set_rmask(CSR_SOFT_RESET),
846 &ha->reg->ctrl_status);
847 readl(&ha->reg->ctrl_status);
848 }
849
850 writel(set_rmask(CSR_FATAL_ERROR),
851 &ha->reg->ctrl_status);
852 readl(&ha->reg->ctrl_status);
853
854 __qla4xxx_disable_intrs(ha);
855
856 set_bit(DPC_RESET_HA, &ha->dpc_flags);
857
858 break;
859 } else if (intr_status & CSR_SCSI_RESET_INTR) {
860 clear_bit(AF_ONLINE, &ha->flags);
861 __qla4xxx_disable_intrs(ha);
862
863 writel(set_rmask(CSR_SCSI_RESET_INTR),
864 &ha->reg->ctrl_status);
865 readl(&ha->reg->ctrl_status);
866
867 if (!test_bit(AF_HA_REMOVAL, &ha->flags))
868 set_bit(DPC_RESET_HA_INTR, &ha->dpc_flags);
869
870 break;
871 } else if (intr_status & INTR_PENDING) {
872 ha->isp_ops->interrupt_service_routine(ha, intr_status);
873 ha->total_io_count++;
874 if (++reqs_count == MAX_REQS_SERVICED_PER_INTR)
875 break;
876 }
877 }
878
879 spin_unlock_irqrestore(&ha->hardware_lock, flags);
880
881 return IRQ_HANDLED;
882 }
883
884 /**
885 * qla4_8xxx_intr_handler - hardware interrupt handler.
886 * @irq: Unused
887 * @dev_id: Pointer to host adapter structure
888 **/
889 irqreturn_t qla4_8xxx_intr_handler(int irq, void *dev_id)
890 {
891 struct scsi_qla_host *ha = dev_id;
892 uint32_t intr_status;
893 uint32_t status;
894 unsigned long flags = 0;
895 uint8_t reqs_count = 0;
896
897 if (unlikely(pci_channel_offline(ha->pdev)))
898 return IRQ_HANDLED;
899
900 ha->isr_count++;
901 status = qla4_8xxx_rd_32(ha, ISR_INT_VECTOR);
902 if (!(status & ha->nx_legacy_intr.int_vec_bit))
903 return IRQ_NONE;
904
905 status = qla4_8xxx_rd_32(ha, ISR_INT_STATE_REG);
906 if (!ISR_IS_LEGACY_INTR_TRIGGERED(status)) {
907 DEBUG2(ql4_printk(KERN_INFO, ha,
908 "%s legacy Int not triggered\n", __func__));
909 return IRQ_NONE;
910 }
911
912 /* clear the interrupt */
913 qla4_8xxx_wr_32(ha, ha->nx_legacy_intr.tgt_status_reg, 0xffffffff);
914
915 /* read twice to ensure write is flushed */
916 qla4_8xxx_rd_32(ha, ISR_INT_VECTOR);
917 qla4_8xxx_rd_32(ha, ISR_INT_VECTOR);
918
919 spin_lock_irqsave(&ha->hardware_lock, flags);
920 while (1) {
921 if (!(readl(&ha->qla4_8xxx_reg->host_int) &
922 ISRX_82XX_RISC_INT)) {
923 qla4_8xxx_spurious_interrupt(ha, reqs_count);
924 break;
925 }
926 intr_status = readl(&ha->qla4_8xxx_reg->host_status);
927 if ((intr_status &
928 (HSRX_RISC_MB_INT | HSRX_RISC_IOCB_INT)) == 0) {
929 qla4_8xxx_spurious_interrupt(ha, reqs_count);
930 break;
931 }
932
933 ha->isp_ops->interrupt_service_routine(ha, intr_status);
934
935 /* Enable Interrupt */
936 qla4_8xxx_wr_32(ha, ha->nx_legacy_intr.tgt_mask_reg, 0xfbff);
937
938 if (++reqs_count == MAX_REQS_SERVICED_PER_INTR)
939 break;
940 }
941
942 spin_unlock_irqrestore(&ha->hardware_lock, flags);
943 return IRQ_HANDLED;
944 }
945
946 irqreturn_t
947 qla4_8xxx_msi_handler(int irq, void *dev_id)
948 {
949 struct scsi_qla_host *ha;
950
951 ha = (struct scsi_qla_host *) dev_id;
952 if (!ha) {
953 DEBUG2(printk(KERN_INFO
954 "qla4xxx: MSIX: Interrupt with NULL host ptr\n"));
955 return IRQ_NONE;
956 }
957
958 ha->isr_count++;
959 /* clear the interrupt */
960 qla4_8xxx_wr_32(ha, ha->nx_legacy_intr.tgt_status_reg, 0xffffffff);
961
962 /* read twice to ensure write is flushed */
963 qla4_8xxx_rd_32(ha, ISR_INT_VECTOR);
964 qla4_8xxx_rd_32(ha, ISR_INT_VECTOR);
965
966 return qla4_8xxx_default_intr_handler(irq, dev_id);
967 }
968
969 /**
970 * qla4_8xxx_default_intr_handler - hardware interrupt handler.
971 * @irq: Unused
972 * @dev_id: Pointer to host adapter structure
973 *
974 * This interrupt handler is called directly for MSI-X, and
975 * called indirectly for MSI.
976 **/
977 irqreturn_t
978 qla4_8xxx_default_intr_handler(int irq, void *dev_id)
979 {
980 struct scsi_qla_host *ha = dev_id;
981 unsigned long flags;
982 uint32_t intr_status;
983 uint8_t reqs_count = 0;
984
985 spin_lock_irqsave(&ha->hardware_lock, flags);
986 while (1) {
987 if (!(readl(&ha->qla4_8xxx_reg->host_int) &
988 ISRX_82XX_RISC_INT)) {
989 qla4_8xxx_spurious_interrupt(ha, reqs_count);
990 break;
991 }
992
993 intr_status = readl(&ha->qla4_8xxx_reg->host_status);
994 if ((intr_status &
995 (HSRX_RISC_MB_INT | HSRX_RISC_IOCB_INT)) == 0) {
996 qla4_8xxx_spurious_interrupt(ha, reqs_count);
997 break;
998 }
999
1000 ha->isp_ops->interrupt_service_routine(ha, intr_status);
1001
1002 if (++reqs_count == MAX_REQS_SERVICED_PER_INTR)
1003 break;
1004 }
1005
1006 ha->isr_count++;
1007 spin_unlock_irqrestore(&ha->hardware_lock, flags);
1008 return IRQ_HANDLED;
1009 }
1010
1011 irqreturn_t
1012 qla4_8xxx_msix_rsp_q(int irq, void *dev_id)
1013 {
1014 struct scsi_qla_host *ha = dev_id;
1015 unsigned long flags;
1016
1017 spin_lock_irqsave(&ha->hardware_lock, flags);
1018 qla4xxx_process_response_queue(ha);
1019 writel(0, &ha->qla4_8xxx_reg->host_int);
1020 spin_unlock_irqrestore(&ha->hardware_lock, flags);
1021
1022 ha->isr_count++;
1023 return IRQ_HANDLED;
1024 }
1025
1026 /**
1027 * qla4xxx_process_aen - processes AENs generated by firmware
1028 * @ha: pointer to host adapter structure.
1029 * @process_aen: type of AENs to process
1030 *
1031 * Processes specific types of Asynchronous Events generated by firmware.
1032 * The type of AENs to process is specified by process_aen and can be
1033 * PROCESS_ALL_AENS 0
1034 * FLUSH_DDB_CHANGED_AENS 1
1035 * RELOGIN_DDB_CHANGED_AENS 2
1036 **/
1037 void qla4xxx_process_aen(struct scsi_qla_host * ha, uint8_t process_aen)
1038 {
1039 uint32_t mbox_sts[MBOX_AEN_REG_COUNT];
1040 struct aen *aen;
1041 int i;
1042 unsigned long flags;
1043
1044 spin_lock_irqsave(&ha->hardware_lock, flags);
1045 while (ha->aen_out != ha->aen_in) {
1046 aen = &ha->aen_q[ha->aen_out];
1047 /* copy aen information to local structure */
1048 for (i = 0; i < MBOX_AEN_REG_COUNT; i++)
1049 mbox_sts[i] = aen->mbox_sts[i];
1050
1051 ha->aen_q_count++;
1052 ha->aen_out++;
1053
1054 if (ha->aen_out == MAX_AEN_ENTRIES)
1055 ha->aen_out = 0;
1056
1057 spin_unlock_irqrestore(&ha->hardware_lock, flags);
1058
1059 DEBUG2(printk("qla4xxx(%ld): AEN[%d]=0x%08x, mbx1=0x%08x mbx2=0x%08x"
1060 " mbx3=0x%08x mbx4=0x%08x\n", ha->host_no,
1061 (ha->aen_out ? (ha->aen_out-1): (MAX_AEN_ENTRIES-1)),
1062 mbox_sts[0], mbox_sts[1], mbox_sts[2],
1063 mbox_sts[3], mbox_sts[4]));
1064
1065 switch (mbox_sts[0]) {
1066 case MBOX_ASTS_DATABASE_CHANGED:
1067 switch (process_aen) {
1068 case FLUSH_DDB_CHANGED_AENS:
1069 DEBUG2(printk("scsi%ld: AEN[%d] %04x, index "
1070 "[%d] state=%04x FLUSHED!\n",
1071 ha->host_no, ha->aen_out,
1072 mbox_sts[0], mbox_sts[2],
1073 mbox_sts[3]));
1074 break;
1075 case PROCESS_ALL_AENS:
1076 default:
1077 /* Specific device. */
1078 if (mbox_sts[1] == 1)
1079 qla4xxx_process_ddb_changed(ha,
1080 mbox_sts[2], mbox_sts[3],
1081 mbox_sts[4]);
1082 break;
1083 }
1084 }
1085 spin_lock_irqsave(&ha->hardware_lock, flags);
1086 }
1087 spin_unlock_irqrestore(&ha->hardware_lock, flags);
1088 }
1089
1090 int qla4xxx_request_irqs(struct scsi_qla_host *ha)
1091 {
1092 int ret;
1093
1094 if (!is_qla8022(ha))
1095 goto try_intx;
1096
1097 if (ql4xenablemsix == 2)
1098 goto try_msi;
1099
1100 if (ql4xenablemsix == 0 || ql4xenablemsix != 1)
1101 goto try_intx;
1102
1103 /* Trying MSI-X */
1104 ret = qla4_8xxx_enable_msix(ha);
1105 if (!ret) {
1106 DEBUG2(ql4_printk(KERN_INFO, ha,
1107 "MSI-X: Enabled (0x%X).\n", ha->revision_id));
1108 goto irq_attached;
1109 }
1110
1111 ql4_printk(KERN_WARNING, ha,
1112 "MSI-X: Falling back-to MSI mode -- %d.\n", ret);
1113
1114 try_msi:
1115 /* Trying MSI */
1116 ret = pci_enable_msi(ha->pdev);
1117 if (!ret) {
1118 ret = request_irq(ha->pdev->irq, qla4_8xxx_msi_handler,
1119 0, DRIVER_NAME, ha);
1120 if (!ret) {
1121 DEBUG2(ql4_printk(KERN_INFO, ha, "MSI: Enabled.\n"));
1122 set_bit(AF_MSI_ENABLED, &ha->flags);
1123 goto irq_attached;
1124 } else {
1125 ql4_printk(KERN_WARNING, ha,
1126 "MSI: Failed to reserve interrupt %d "
1127 "already in use.\n", ha->pdev->irq);
1128 pci_disable_msi(ha->pdev);
1129 }
1130 }
1131 ql4_printk(KERN_WARNING, ha,
1132 "MSI: Falling back-to INTx mode -- %d.\n", ret);
1133
1134 try_intx:
1135 /* Trying INTx */
1136 ret = request_irq(ha->pdev->irq, ha->isp_ops->intr_handler,
1137 IRQF_SHARED, DRIVER_NAME, ha);
1138 if (!ret) {
1139 DEBUG2(ql4_printk(KERN_INFO, ha, "INTx: Enabled.\n"));
1140 set_bit(AF_INTx_ENABLED, &ha->flags);
1141 goto irq_attached;
1142
1143 } else {
1144 ql4_printk(KERN_WARNING, ha,
1145 "INTx: Failed to reserve interrupt %d already in"
1146 " use.\n", ha->pdev->irq);
1147 return ret;
1148 }
1149
1150 irq_attached:
1151 set_bit(AF_IRQ_ATTACHED, &ha->flags);
1152 ha->host->irq = ha->pdev->irq;
1153 ql4_printk(KERN_INFO, ha, "%s: irq %d attached\n",
1154 __func__, ha->pdev->irq);
1155 return ret;
1156 }
1157
1158 void qla4xxx_free_irqs(struct scsi_qla_host *ha)
1159 {
1160 if (test_bit(AF_MSIX_ENABLED, &ha->flags))
1161 qla4_8xxx_disable_msix(ha);
1162 else if (test_and_clear_bit(AF_MSI_ENABLED, &ha->flags)) {
1163 free_irq(ha->pdev->irq, ha);
1164 pci_disable_msi(ha->pdev);
1165 } else if (test_and_clear_bit(AF_INTx_ENABLED, &ha->flags))
1166 free_irq(ha->pdev->irq, ha);
1167 }
linux-next