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power: reset: corrections for simple syscon reboot driver
[linux-2.6/btrfs-unstable.git] / drivers / scsi / qla4xxx / ql4_isr.c
blob4f9c0f2be89d951515b3c22a4a134b5113107e99
1 /*
2 * QLogic iSCSI HBA Driver
3 * Copyright (c) 2003-2013 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:%llu: %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:%llu: %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 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:%llu: %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:%llu: %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:%llu: %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:%llu: 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:%llu: %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:%llu: %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:%llu: %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:%llu: 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:%llu: %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
359 /**
360 * qla4xxx_passthru_status_entry - processes passthru status IOCBs (0x3C)
361 * @ha: Pointer to host adapter structure.
362 * @sts_entry: Pointer to status entry structure.
363 **/
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->back_lock);
389 task = iscsi_itt_to_task(conn, itt);
390 spin_unlock(&conn->session->back_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->iocb_cnt -= task_data->iocb_req_cnt;
400 queue_work(ha->task_wq, &task_data->task_work);
401 }
402
403 static struct mrb *qla4xxx_del_mrb_from_active_array(struct scsi_qla_host *ha,
404 uint32_t index)
405 {
406 struct mrb *mrb = NULL;
407
408 /* validate handle and remove from active array */
409 if (index >= MAX_MRB)
410 return mrb;
411
412 mrb = ha->active_mrb_array[index];
413 ha->active_mrb_array[index] = NULL;
414 if (!mrb)
415 return mrb;
416
417 /* update counters */
418 ha->iocb_cnt -= mrb->iocb_cnt;
419
420 return mrb;
421 }
422
423 static void qla4xxx_mbox_status_entry(struct scsi_qla_host *ha,
424 struct mbox_status_iocb *mbox_sts_entry)
425 {
426 struct mrb *mrb;
427 uint32_t status;
428 uint32_t data_size;
429
430 mrb = qla4xxx_del_mrb_from_active_array(ha,
431 le32_to_cpu(mbox_sts_entry->handle));
432
433 if (mrb == NULL) {
434 ql4_printk(KERN_WARNING, ha, "%s: mrb[%d] is null\n", __func__,
435 mbox_sts_entry->handle);
436 return;
437 }
438
439 switch (mrb->mbox_cmd) {
440 case MBOX_CMD_PING:
441 DEBUG2(ql4_printk(KERN_INFO, ha, "%s: mbox_cmd = 0x%x, "
442 "mbox_sts[0] = 0x%x, mbox_sts[6] = 0x%x\n",
443 __func__, mrb->mbox_cmd,
444 mbox_sts_entry->out_mbox[0],
445 mbox_sts_entry->out_mbox[6]));
446
447 if (mbox_sts_entry->out_mbox[0] == MBOX_STS_COMMAND_COMPLETE)
448 status = ISCSI_PING_SUCCESS;
449 else
450 status = mbox_sts_entry->out_mbox[6];
451
452 data_size = sizeof(mbox_sts_entry->out_mbox);
453
454 qla4xxx_post_ping_evt_work(ha, status, mrb->pid, data_size,
455 (uint8_t *) mbox_sts_entry->out_mbox);
456 break;
457
458 default:
459 DEBUG2(ql4_printk(KERN_WARNING, ha, "%s: invalid mbox_cmd = "
460 "0x%x\n", __func__, mrb->mbox_cmd));
461 }
462
463 kfree(mrb);
464 return;
465 }
466
467 /**
468 * qla4xxx_process_response_queue - process response queue completions
469 * @ha: Pointer to host adapter structure.
470 *
471 * This routine process response queue completions in interrupt context.
472 * Hardware_lock locked upon entry
473 **/
474 void qla4xxx_process_response_queue(struct scsi_qla_host *ha)
475 {
476 uint32_t count = 0;
477 struct srb *srb = NULL;
478 struct status_entry *sts_entry;
479
480 /* Process all responses from response queue */
481 while ((ha->response_ptr->signature != RESPONSE_PROCESSED)) {
482 sts_entry = (struct status_entry *) ha->response_ptr;
483 count++;
484
485 /* Advance pointers for next entry */
486 if (ha->response_out == (RESPONSE_QUEUE_DEPTH - 1)) {
487 ha->response_out = 0;
488 ha->response_ptr = ha->response_ring;
489 } else {
490 ha->response_out++;
491 ha->response_ptr++;
492 }
493
494 /* process entry */
495 switch (sts_entry->hdr.entryType) {
496 case ET_STATUS:
497 /* Common status */
498 qla4xxx_status_entry(ha, sts_entry);
499 break;
500
501 case ET_PASSTHRU_STATUS:
502 if (sts_entry->hdr.systemDefined == SD_ISCSI_PDU)
503 qla4xxx_passthru_status_entry(ha,
504 (struct passthru_status *)sts_entry);
505 else
506 ql4_printk(KERN_ERR, ha,
507 "%s: Invalid status received\n",
508 __func__);
509
510 break;
511
512 case ET_STATUS_CONTINUATION:
513 qla4xxx_status_cont_entry(ha,
514 (struct status_cont_entry *) sts_entry);
515 break;
516
517 case ET_COMMAND:
518 /* ISP device queue is full. Command not
519 * accepted by ISP. Queue command for
520 * later */
521
522 srb = qla4xxx_del_from_active_array(ha,
523 le32_to_cpu(sts_entry->
524 handle));
525 if (srb == NULL)
526 goto exit_prq_invalid_handle;
527
528 DEBUG2(printk("scsi%ld: %s: FW device queue full, "
529 "srb %p\n", ha->host_no, __func__, srb));
530
531 /* ETRY normally by sending it back with
532 * DID_BUS_BUSY */
533 srb->cmd->result = DID_BUS_BUSY << 16;
534 kref_put(&srb->srb_ref, qla4xxx_srb_compl);
535 break;
536
537 case ET_CONTINUE:
538 /* Just throw away the continuation entries */
539 DEBUG2(printk("scsi%ld: %s: Continuation entry - "
540 "ignoring\n", ha->host_no, __func__));
541 break;
542
543 case ET_MBOX_STATUS:
544 DEBUG2(ql4_printk(KERN_INFO, ha,
545 "%s: mbox status IOCB\n", __func__));
546 qla4xxx_mbox_status_entry(ha,
547 (struct mbox_status_iocb *)sts_entry);
548 break;
549
550 default:
551 /*
552 * Invalid entry in response queue, reset RISC
553 * firmware.
554 */
555 DEBUG2(printk("scsi%ld: %s: Invalid entry %x in "
556 "response queue \n", ha->host_no,
557 __func__,
558 sts_entry->hdr.entryType));
559 goto exit_prq_error;
560 }
561 ((struct response *)sts_entry)->signature = RESPONSE_PROCESSED;
562 wmb();
563 }
564
565 /*
566 * Tell ISP we're done with response(s). This also clears the interrupt.
567 */
568 ha->isp_ops->complete_iocb(ha);
569
570 return;
571
572 exit_prq_invalid_handle:
573 DEBUG2(printk("scsi%ld: %s: Invalid handle(srb)=%p type=%x IOCS=%x\n",
574 ha->host_no, __func__, srb, sts_entry->hdr.entryType,
575 sts_entry->completionStatus));
576
577 exit_prq_error:
578 ha->isp_ops->complete_iocb(ha);
579 set_bit(DPC_RESET_HA, &ha->dpc_flags);
580 }
581
582 /**
583 * qla4_83xx_loopback_in_progress: Is loopback in progress?
584 * @ha: Pointer to host adapter structure.
585 * @ret: 1 = loopback in progress, 0 = loopback not in progress
586 **/
587 static int qla4_83xx_loopback_in_progress(struct scsi_qla_host *ha)
588 {
589 int rval = 1;
590
591 if (is_qla8032(ha) || is_qla8042(ha)) {
592 if ((ha->idc_info.info2 & ENABLE_INTERNAL_LOOPBACK) ||
593 (ha->idc_info.info2 & ENABLE_EXTERNAL_LOOPBACK)) {
594 DEBUG2(ql4_printk(KERN_INFO, ha,
595 "%s: Loopback diagnostics in progress\n",
596 __func__));
597 rval = 1;
598 } else {
599 DEBUG2(ql4_printk(KERN_INFO, ha,
600 "%s: Loopback diagnostics not in progress\n",
601 __func__));
602 rval = 0;
603 }
604 }
605
606 return rval;
607 }
608
609 static void qla4xxx_update_ipaddr_state(struct scsi_qla_host *ha,
610 uint32_t ipaddr_idx,
611 uint32_t ipaddr_fw_state)
612 {
613 uint8_t ipaddr_state;
614 uint8_t ip_idx;
615
616 ip_idx = ipaddr_idx & 0xF;
617 ipaddr_state = qla4xxx_set_ipaddr_state((uint8_t)ipaddr_fw_state);
618
619 switch (ip_idx) {
620 case 0:
621 ha->ip_config.ipv4_addr_state = ipaddr_state;
622 break;
623 case 1:
624 ha->ip_config.ipv6_link_local_state = ipaddr_state;
625 break;
626 case 2:
627 ha->ip_config.ipv6_addr0_state = ipaddr_state;
628 break;
629 case 3:
630 ha->ip_config.ipv6_addr1_state = ipaddr_state;
631 break;
632 default:
633 ql4_printk(KERN_INFO, ha, "%s: Invalid IPADDR index %d\n",
634 __func__, ip_idx);
635 }
636 }
637
638 static void qla4xxx_default_router_changed(struct scsi_qla_host *ha,
639 uint32_t *mbox_sts)
640 {
641 memcpy(&ha->ip_config.ipv6_default_router_addr.s6_addr32[0],
642 &mbox_sts[2], sizeof(uint32_t));
643 memcpy(&ha->ip_config.ipv6_default_router_addr.s6_addr32[1],
644 &mbox_sts[3], sizeof(uint32_t));
645 memcpy(&ha->ip_config.ipv6_default_router_addr.s6_addr32[2],
646 &mbox_sts[4], sizeof(uint32_t));
647 memcpy(&ha->ip_config.ipv6_default_router_addr.s6_addr32[3],
648 &mbox_sts[5], sizeof(uint32_t));
649 }
650
651 /**
652 * qla4xxx_isr_decode_mailbox - decodes mailbox status
653 * @ha: Pointer to host adapter structure.
654 * @mailbox_status: Mailbox status.
655 *
656 * This routine decodes the mailbox status during the ISR.
657 * Hardware_lock locked upon entry. runs in interrupt context.
658 **/
659 static void qla4xxx_isr_decode_mailbox(struct scsi_qla_host * ha,
660 uint32_t mbox_status)
661 {
662 int i;
663 uint32_t mbox_sts[MBOX_AEN_REG_COUNT];
664 __le32 __iomem *mailbox_out;
665 uint32_t opcode = 0;
666
667 if (is_qla8032(ha) || is_qla8042(ha))
668 mailbox_out = &ha->qla4_83xx_reg->mailbox_out[0];
669 else if (is_qla8022(ha))
670 mailbox_out = &ha->qla4_82xx_reg->mailbox_out[0];
671 else
672 mailbox_out = &ha->reg->mailbox[0];
673
674 if ((mbox_status == MBOX_STS_BUSY) ||
675 (mbox_status == MBOX_STS_INTERMEDIATE_COMPLETION) ||
676 (mbox_status >> 12 == MBOX_COMPLETION_STATUS)) {
677 ha->mbox_status[0] = mbox_status;
678
679 if (test_bit(AF_MBOX_COMMAND, &ha->flags)) {
680 /*
681 * Copy all mailbox registers to a temporary
682 * location and set mailbox command done flag
683 */
684 for (i = 0; i < ha->mbox_status_count; i++)
685 ha->mbox_status[i] = readl(&mailbox_out[i]);
686
687 set_bit(AF_MBOX_COMMAND_DONE, &ha->flags);
688
689 if (test_bit(AF_MBOX_COMMAND_NOPOLL, &ha->flags))
690 complete(&ha->mbx_intr_comp);
691 }
692 } else if (mbox_status >> 12 == MBOX_ASYNC_EVENT_STATUS) {
693 for (i = 0; i < MBOX_AEN_REG_COUNT; i++)
694 mbox_sts[i] = readl(&mailbox_out[i]);
695
696 /* Immediately process the AENs that don't require much work.
697 * Only queue the database_changed AENs */
698 if (ha->aen_log.count < MAX_AEN_ENTRIES) {
699 for (i = 0; i < MBOX_AEN_REG_COUNT; i++)
700 ha->aen_log.entry[ha->aen_log.count].mbox_sts[i] =
701 mbox_sts[i];
702 ha->aen_log.count++;
703 }
704 switch (mbox_status) {
705 case MBOX_ASTS_SYSTEM_ERROR:
706 /* Log Mailbox registers */
707 ql4_printk(KERN_INFO, ha, "%s: System Err\n", __func__);
708 qla4xxx_dump_registers(ha);
709
710 if ((is_qla8022(ha) && ql4xdontresethba) ||
711 ((is_qla8032(ha) || is_qla8042(ha)) &&
712 qla4_83xx_idc_dontreset(ha))) {
713 DEBUG2(printk("scsi%ld: %s:Don't Reset HBA\n",
714 ha->host_no, __func__));
715 } else {
716 set_bit(AF_GET_CRASH_RECORD, &ha->flags);
717 set_bit(DPC_RESET_HA, &ha->dpc_flags);
718 }
719 break;
720
721 case MBOX_ASTS_REQUEST_TRANSFER_ERROR:
722 case MBOX_ASTS_RESPONSE_TRANSFER_ERROR:
723 case MBOX_ASTS_NVRAM_INVALID:
724 case MBOX_ASTS_IP_ADDRESS_CHANGED:
725 case MBOX_ASTS_DHCP_LEASE_EXPIRED:
726 DEBUG2(printk("scsi%ld: AEN %04x, ERROR Status, "
727 "Reset HA\n", ha->host_no, mbox_status));
728 if (is_qla80XX(ha))
729 set_bit(DPC_RESET_HA_FW_CONTEXT,
730 &ha->dpc_flags);
731 else
732 set_bit(DPC_RESET_HA, &ha->dpc_flags);
733 break;
734
735 case MBOX_ASTS_LINK_UP:
736 set_bit(AF_LINK_UP, &ha->flags);
737 if (test_bit(AF_INIT_DONE, &ha->flags))
738 set_bit(DPC_LINK_CHANGED, &ha->dpc_flags);
739
740 ql4_printk(KERN_INFO, ha, "%s: LINK UP\n", __func__);
741 qla4xxx_post_aen_work(ha, ISCSI_EVENT_LINKUP,
742 sizeof(mbox_sts),
743 (uint8_t *) mbox_sts);
744
745 if ((is_qla8032(ha) || is_qla8042(ha)) &&
746 ha->notify_link_up_comp)
747 complete(&ha->link_up_comp);
748
749 break;
750
751 case MBOX_ASTS_LINK_DOWN:
752 clear_bit(AF_LINK_UP, &ha->flags);
753 if (test_bit(AF_INIT_DONE, &ha->flags)) {
754 set_bit(DPC_LINK_CHANGED, &ha->dpc_flags);
755 qla4xxx_wake_dpc(ha);
756 }
757
758 ql4_printk(KERN_INFO, ha, "%s: LINK DOWN\n", __func__);
759 qla4xxx_post_aen_work(ha, ISCSI_EVENT_LINKDOWN,
760 sizeof(mbox_sts),
761 (uint8_t *) mbox_sts);
762 break;
763
764 case MBOX_ASTS_HEARTBEAT:
765 ha->seconds_since_last_heartbeat = 0;
766 break;
767
768 case MBOX_ASTS_DHCP_LEASE_ACQUIRED:
769 DEBUG2(printk("scsi%ld: AEN %04x DHCP LEASE "
770 "ACQUIRED\n", ha->host_no, mbox_status));
771 set_bit(DPC_GET_DHCP_IP_ADDR, &ha->dpc_flags);
772 break;
773
774 case MBOX_ASTS_PROTOCOL_STATISTIC_ALARM:
775 case MBOX_ASTS_SCSI_COMMAND_PDU_REJECTED: /* Target
776 * mode
777 * only */
778 case MBOX_ASTS_UNSOLICITED_PDU_RECEIVED: /* Connection mode */
779 case MBOX_ASTS_IPSEC_SYSTEM_FATAL_ERROR:
780 case MBOX_ASTS_SUBNET_STATE_CHANGE:
781 case MBOX_ASTS_DUPLICATE_IP:
782 /* No action */
783 DEBUG2(printk("scsi%ld: AEN %04x\n", ha->host_no,
784 mbox_status));
785 break;
786
787 case MBOX_ASTS_IP_ADDR_STATE_CHANGED:
788 printk("scsi%ld: AEN %04x, mbox_sts[2]=%04x, "
789 "mbox_sts[3]=%04x\n", ha->host_no, mbox_sts[0],
790 mbox_sts[2], mbox_sts[3]);
791
792 qla4xxx_update_ipaddr_state(ha, mbox_sts[5],
793 mbox_sts[3]);
794 /* mbox_sts[2] = Old ACB state
795 * mbox_sts[3] = new ACB state */
796 if ((mbox_sts[3] == IP_ADDRSTATE_PREFERRED) &&
797 ((mbox_sts[2] == IP_ADDRSTATE_TENTATIVE) ||
798 (mbox_sts[2] == IP_ADDRSTATE_ACQUIRING))) {
799 set_bit(DPC_GET_DHCP_IP_ADDR, &ha->dpc_flags);
800 } else if ((mbox_sts[3] == IP_ADDRSTATE_ACQUIRING) &&
801 (mbox_sts[2] == IP_ADDRSTATE_PREFERRED)) {
802 if (is_qla80XX(ha))
803 set_bit(DPC_RESET_HA_FW_CONTEXT,
804 &ha->dpc_flags);
805 else
806 set_bit(DPC_RESET_HA, &ha->dpc_flags);
807 } else if (mbox_sts[3] == IP_ADDRSTATE_DISABLING) {
808 ql4_printk(KERN_INFO, ha, "scsi%ld: %s: ACB in disabling state\n",
809 ha->host_no, __func__);
810 } else if (mbox_sts[3] == IP_ADDRSTATE_UNCONFIGURED) {
811 complete(&ha->disable_acb_comp);
812 ql4_printk(KERN_INFO, ha, "scsi%ld: %s: ACB state unconfigured\n",
813 ha->host_no, __func__);
814 }
815 break;
816
817 case MBOX_ASTS_IPV6_LINK_MTU_CHANGE:
818 case MBOX_ASTS_IPV6_AUTO_PREFIX_IGNORED:
819 case MBOX_ASTS_IPV6_ND_LOCAL_PREFIX_IGNORED:
820 /* No action */
821 DEBUG2(ql4_printk(KERN_INFO, ha, "scsi%ld: AEN %04x\n",
822 ha->host_no, mbox_status));
823 break;
824
825 case MBOX_ASTS_ICMPV6_ERROR_MSG_RCVD:
826 DEBUG2(ql4_printk(KERN_INFO, ha,
827 "scsi%ld: AEN %04x, IPv6 ERROR, "
828 "mbox_sts[1]=%08x, mbox_sts[2]=%08x, mbox_sts[3}=%08x, mbox_sts[4]=%08x mbox_sts[5]=%08x\n",
829 ha->host_no, mbox_sts[0], mbox_sts[1],
830 mbox_sts[2], mbox_sts[3], mbox_sts[4],
831 mbox_sts[5]));
832 break;
833
834 case MBOX_ASTS_MAC_ADDRESS_CHANGED:
835 case MBOX_ASTS_DNS:
836 /* No action */
837 DEBUG2(printk(KERN_INFO "scsi%ld: AEN %04x, "
838 "mbox_sts[1]=%04x, mbox_sts[2]=%04x\n",
839 ha->host_no, mbox_sts[0],
840 mbox_sts[1], mbox_sts[2]));
841 break;
842
843 case MBOX_ASTS_SELF_TEST_FAILED:
844 case MBOX_ASTS_LOGIN_FAILED:
845 /* No action */
846 DEBUG2(printk("scsi%ld: AEN %04x, mbox_sts[1]=%04x, "
847 "mbox_sts[2]=%04x, mbox_sts[3]=%04x\n",
848 ha->host_no, mbox_sts[0], mbox_sts[1],
849 mbox_sts[2], mbox_sts[3]));
850 break;
851
852 case MBOX_ASTS_DATABASE_CHANGED:
853 /* Queue AEN information and process it in the DPC
854 * routine */
855 if (ha->aen_q_count > 0) {
856
857 /* decrement available counter */
858 ha->aen_q_count--;
859
860 for (i = 0; i < MBOX_AEN_REG_COUNT; i++)
861 ha->aen_q[ha->aen_in].mbox_sts[i] =
862 mbox_sts[i];
863
864 /* print debug message */
865 DEBUG2(printk("scsi%ld: AEN[%d] %04x queued "
866 "mb1:0x%x mb2:0x%x mb3:0x%x "
867 "mb4:0x%x mb5:0x%x\n",
868 ha->host_no, ha->aen_in,
869 mbox_sts[0], mbox_sts[1],
870 mbox_sts[2], mbox_sts[3],
871 mbox_sts[4], mbox_sts[5]));
872
873 /* advance pointer */
874 ha->aen_in++;
875 if (ha->aen_in == MAX_AEN_ENTRIES)
876 ha->aen_in = 0;
877
878 /* The DPC routine will process the aen */
879 set_bit(DPC_AEN, &ha->dpc_flags);
880 } else {
881 DEBUG2(printk("scsi%ld: %s: aen %04x, queue "
882 "overflowed! AEN LOST!!\n",
883 ha->host_no, __func__,
884 mbox_sts[0]));
885
886 DEBUG2(printk("scsi%ld: DUMP AEN QUEUE\n",
887 ha->host_no));
888
889 for (i = 0; i < MAX_AEN_ENTRIES; i++) {
890 DEBUG2(printk("AEN[%d] %04x %04x %04x "
891 "%04x\n", i, mbox_sts[0],
892 mbox_sts[1], mbox_sts[2],
893 mbox_sts[3]));
894 }
895 }
896 break;
897
898 case MBOX_ASTS_TXSCVR_INSERTED:
899 DEBUG2(printk(KERN_WARNING
900 "scsi%ld: AEN %04x Transceiver"
901 " inserted\n", ha->host_no, mbox_sts[0]));
902 break;
903
904 case MBOX_ASTS_TXSCVR_REMOVED:
905 DEBUG2(printk(KERN_WARNING
906 "scsi%ld: AEN %04x Transceiver"
907 " removed\n", ha->host_no, mbox_sts[0]));
908 break;
909
910 case MBOX_ASTS_IDC_REQUEST_NOTIFICATION:
911 if (is_qla8032(ha) || is_qla8042(ha)) {
912 DEBUG2(ql4_printk(KERN_INFO, ha,
913 "scsi%ld: AEN %04x, mbox_sts[1]=%08x, mbox_sts[2]=%08x, mbox_sts[3]=%08x, mbox_sts[4]=%08x\n",
914 ha->host_no, mbox_sts[0],
915 mbox_sts[1], mbox_sts[2],
916 mbox_sts[3], mbox_sts[4]));
917 opcode = mbox_sts[1] >> 16;
918 if ((opcode == MBOX_CMD_SET_PORT_CONFIG) ||
919 (opcode == MBOX_CMD_PORT_RESET)) {
920 set_bit(DPC_POST_IDC_ACK,
921 &ha->dpc_flags);
922 ha->idc_info.request_desc = mbox_sts[1];
923 ha->idc_info.info1 = mbox_sts[2];
924 ha->idc_info.info2 = mbox_sts[3];
925 ha->idc_info.info3 = mbox_sts[4];
926 qla4xxx_wake_dpc(ha);
927 }
928 }
929 break;
930
931 case MBOX_ASTS_IDC_COMPLETE:
932 if (is_qla8032(ha) || is_qla8042(ha)) {
933 DEBUG2(ql4_printk(KERN_INFO, ha,
934 "scsi%ld: AEN %04x, mbox_sts[1]=%08x, mbox_sts[2]=%08x, mbox_sts[3]=%08x, mbox_sts[4]=%08x\n",
935 ha->host_no, mbox_sts[0],
936 mbox_sts[1], mbox_sts[2],
937 mbox_sts[3], mbox_sts[4]));
938 DEBUG2(ql4_printk(KERN_INFO, ha,
939 "scsi:%ld: AEN %04x IDC Complete notification\n",
940 ha->host_no, mbox_sts[0]));
941
942 opcode = mbox_sts[1] >> 16;
943 if (ha->notify_idc_comp)
944 complete(&ha->idc_comp);
945
946 if ((opcode == MBOX_CMD_SET_PORT_CONFIG) ||
947 (opcode == MBOX_CMD_PORT_RESET))
948 ha->idc_info.info2 = mbox_sts[3];
949
950 if (qla4_83xx_loopback_in_progress(ha)) {
951 set_bit(AF_LOOPBACK, &ha->flags);
952 } else {
953 clear_bit(AF_LOOPBACK, &ha->flags);
954 if (ha->saved_acb)
955 set_bit(DPC_RESTORE_ACB,
956 &ha->dpc_flags);
957 }
958 qla4xxx_wake_dpc(ha);
959 }
960 break;
961
962 case MBOX_ASTS_IPV6_DEFAULT_ROUTER_CHANGED:
963 DEBUG2(ql4_printk(KERN_INFO, ha,
964 "scsi%ld: AEN %04x, mbox_sts[1]=%08x, mbox_sts[2]=%08x, mbox_sts[3]=%08x, mbox_sts[4]=%08x mbox_sts[5]=%08x\n",
965 ha->host_no, mbox_sts[0], mbox_sts[1],
966 mbox_sts[2], mbox_sts[3], mbox_sts[4],
967 mbox_sts[5]));
968 DEBUG2(ql4_printk(KERN_INFO, ha,
969 "scsi%ld: AEN %04x Received IPv6 default router changed notification\n",
970 ha->host_no, mbox_sts[0]));
971 qla4xxx_default_router_changed(ha, mbox_sts);
972 break;
973
974 case MBOX_ASTS_IDC_TIME_EXTEND_NOTIFICATION:
975 DEBUG2(ql4_printk(KERN_INFO, ha,
976 "scsi%ld: AEN %04x, mbox_sts[1]=%08x, mbox_sts[2]=%08x, mbox_sts[3]=%08x, mbox_sts[4]=%08x mbox_sts[5]=%08x\n",
977 ha->host_no, mbox_sts[0], mbox_sts[1],
978 mbox_sts[2], mbox_sts[3], mbox_sts[4],
979 mbox_sts[5]));
980 DEBUG2(ql4_printk(KERN_INFO, ha,
981 "scsi%ld: AEN %04x Received IDC Extend Timeout notification\n",
982 ha->host_no, mbox_sts[0]));
983 /* new IDC timeout */
984 ha->idc_extend_tmo = mbox_sts[1];
985 break;
986
987 case MBOX_ASTS_INITIALIZATION_FAILED:
988 DEBUG2(ql4_printk(KERN_INFO, ha,
989 "scsi%ld: AEN %04x, mbox_sts[3]=%08x\n",
990 ha->host_no, mbox_sts[0],
991 mbox_sts[3]));
992 break;
993
994 case MBOX_ASTS_SYSTEM_WARNING_EVENT:
995 DEBUG2(ql4_printk(KERN_WARNING, ha,
996 "scsi%ld: AEN %04x, mbox_sts[1]=%08x, mbox_sts[2]=%08x, mbox_sts[3]=%08x, mbox_sts[4]=%08x mbox_sts[5]=%08x\n",
997 ha->host_no, mbox_sts[0], mbox_sts[1],
998 mbox_sts[2], mbox_sts[3], mbox_sts[4],
999 mbox_sts[5]));
1000 break;
1001
1002 case MBOX_ASTS_DCBX_CONF_CHANGE:
1003 DEBUG2(ql4_printk(KERN_INFO, ha,
1004 "scsi%ld: AEN %04x, mbox_sts[1]=%08x, mbox_sts[2]=%08x, mbox_sts[3]=%08x, mbox_sts[4]=%08x mbox_sts[5]=%08x\n",
1005 ha->host_no, mbox_sts[0], mbox_sts[1],
1006 mbox_sts[2], mbox_sts[3], mbox_sts[4],
1007 mbox_sts[5]));
1008 DEBUG2(ql4_printk(KERN_INFO, ha,
1009 "scsi%ld: AEN %04x Received DCBX configuration changed notification\n",
1010 ha->host_no, mbox_sts[0]));
1011 break;
1012
1013 default:
1014 DEBUG2(printk(KERN_WARNING
1015 "scsi%ld: AEN %04x UNKNOWN\n",
1016 ha->host_no, mbox_sts[0]));
1017 break;
1018 }
1019 } else {
1020 DEBUG2(printk("scsi%ld: Unknown mailbox status %08X\n",
1021 ha->host_no, mbox_status));
1022
1023 ha->mbox_status[0] = mbox_status;
1024 }
1025 }
1026
1027 void qla4_83xx_interrupt_service_routine(struct scsi_qla_host *ha,
1028 uint32_t intr_status)
1029 {
1030 /* Process mailbox/asynch event interrupt.*/
1031 if (intr_status) {
1032 qla4xxx_isr_decode_mailbox(ha,
1033 readl(&ha->qla4_83xx_reg->mailbox_out[0]));
1034 /* clear the interrupt */
1035 writel(0, &ha->qla4_83xx_reg->risc_intr);
1036 } else {
1037 qla4xxx_process_response_queue(ha);
1038 }
1039
1040 /* clear the interrupt */
1041 writel(0, &ha->qla4_83xx_reg->mb_int_mask);
1042 }
1043
1044 /**
1045 * qla4_82xx_interrupt_service_routine - isr
1046 * @ha: pointer to host adapter structure.
1047 *
1048 * This is the main interrupt service routine.
1049 * hardware_lock locked upon entry. runs in interrupt context.
1050 **/
1051 void qla4_82xx_interrupt_service_routine(struct scsi_qla_host *ha,
1052 uint32_t intr_status)
1053 {
1054 /* Process response queue interrupt. */
1055 if ((intr_status & HSRX_RISC_IOCB_INT) &&
1056 test_bit(AF_INIT_DONE, &ha->flags))
1057 qla4xxx_process_response_queue(ha);
1058
1059 /* Process mailbox/asynch event interrupt.*/
1060 if (intr_status & HSRX_RISC_MB_INT)
1061 qla4xxx_isr_decode_mailbox(ha,
1062 readl(&ha->qla4_82xx_reg->mailbox_out[0]));
1063
1064 /* clear the interrupt */
1065 writel(0, &ha->qla4_82xx_reg->host_int);
1066 readl(&ha->qla4_82xx_reg->host_int);
1067 }
1068
1069 /**
1070 * qla4xxx_interrupt_service_routine - isr
1071 * @ha: pointer to host adapter structure.
1072 *
1073 * This is the main interrupt service routine.
1074 * hardware_lock locked upon entry. runs in interrupt context.
1075 **/
1076 void qla4xxx_interrupt_service_routine(struct scsi_qla_host * ha,
1077 uint32_t intr_status)
1078 {
1079 /* Process response queue interrupt. */
1080 if (intr_status & CSR_SCSI_COMPLETION_INTR)
1081 qla4xxx_process_response_queue(ha);
1082
1083 /* Process mailbox/asynch event interrupt.*/
1084 if (intr_status & CSR_SCSI_PROCESSOR_INTR) {
1085 qla4xxx_isr_decode_mailbox(ha,
1086 readl(&ha->reg->mailbox[0]));
1087
1088 /* Clear Mailbox Interrupt */
1089 writel(set_rmask(CSR_SCSI_PROCESSOR_INTR),
1090 &ha->reg->ctrl_status);
1091 readl(&ha->reg->ctrl_status);
1092 }
1093 }
1094
1095 /**
1096 * qla4_82xx_spurious_interrupt - processes spurious interrupt
1097 * @ha: pointer to host adapter structure.
1098 * @reqs_count: .
1099 *
1100 **/
1101 static void qla4_82xx_spurious_interrupt(struct scsi_qla_host *ha,
1102 uint8_t reqs_count)
1103 {
1104 if (reqs_count)
1105 return;
1106
1107 DEBUG2(ql4_printk(KERN_INFO, ha, "Spurious Interrupt\n"));
1108 if (is_qla8022(ha)) {
1109 writel(0, &ha->qla4_82xx_reg->host_int);
1110 if (test_bit(AF_INTx_ENABLED, &ha->flags))
1111 qla4_82xx_wr_32(ha, ha->nx_legacy_intr.tgt_mask_reg,
1112 0xfbff);
1113 }
1114 ha->spurious_int_count++;
1115 }
1116
1117 /**
1118 * qla4xxx_intr_handler - hardware interrupt handler.
1119 * @irq: Unused
1120 * @dev_id: Pointer to host adapter structure
1121 **/
1122 irqreturn_t qla4xxx_intr_handler(int irq, void *dev_id)
1123 {
1124 struct scsi_qla_host *ha;
1125 uint32_t intr_status;
1126 unsigned long flags = 0;
1127 uint8_t reqs_count = 0;
1128
1129 ha = (struct scsi_qla_host *) dev_id;
1130 if (!ha) {
1131 DEBUG2(printk(KERN_INFO
1132 "qla4xxx: Interrupt with NULL host ptr\n"));
1133 return IRQ_NONE;
1134 }
1135
1136 spin_lock_irqsave(&ha->hardware_lock, flags);
1137
1138 ha->isr_count++;
1139 /*
1140 * Repeatedly service interrupts up to a maximum of
1141 * MAX_REQS_SERVICED_PER_INTR
1142 */
1143 while (1) {
1144 /*
1145 * Read interrupt status
1146 */
1147 if (ha->isp_ops->rd_shdw_rsp_q_in(ha) !=
1148 ha->response_out)
1149 intr_status = CSR_SCSI_COMPLETION_INTR;
1150 else
1151 intr_status = readl(&ha->reg->ctrl_status);
1152
1153 if ((intr_status &
1154 (CSR_SCSI_RESET_INTR|CSR_FATAL_ERROR|INTR_PENDING)) == 0) {
1155 if (reqs_count == 0)
1156 ha->spurious_int_count++;
1157 break;
1158 }
1159
1160 if (intr_status & CSR_FATAL_ERROR) {
1161 DEBUG2(printk(KERN_INFO "scsi%ld: Fatal Error, "
1162 "Status 0x%04x\n", ha->host_no,
1163 readl(isp_port_error_status (ha))));
1164
1165 /* Issue Soft Reset to clear this error condition.
1166 * This will prevent the RISC from repeatedly
1167 * interrupting the driver; thus, allowing the DPC to
1168 * get scheduled to continue error recovery.
1169 * NOTE: Disabling RISC interrupts does not work in
1170 * this case, as CSR_FATAL_ERROR overrides
1171 * CSR_SCSI_INTR_ENABLE */
1172 if ((readl(&ha->reg->ctrl_status) &
1173 CSR_SCSI_RESET_INTR) == 0) {
1174 writel(set_rmask(CSR_SOFT_RESET),
1175 &ha->reg->ctrl_status);
1176 readl(&ha->reg->ctrl_status);
1177 }
1178
1179 writel(set_rmask(CSR_FATAL_ERROR),
1180 &ha->reg->ctrl_status);
1181 readl(&ha->reg->ctrl_status);
1182
1183 __qla4xxx_disable_intrs(ha);
1184
1185 set_bit(DPC_RESET_HA, &ha->dpc_flags);
1186
1187 break;
1188 } else if (intr_status & CSR_SCSI_RESET_INTR) {
1189 clear_bit(AF_ONLINE, &ha->flags);
1190 __qla4xxx_disable_intrs(ha);
1191
1192 writel(set_rmask(CSR_SCSI_RESET_INTR),
1193 &ha->reg->ctrl_status);
1194 readl(&ha->reg->ctrl_status);
1195
1196 if (!test_bit(AF_HA_REMOVAL, &ha->flags))
1197 set_bit(DPC_RESET_HA_INTR, &ha->dpc_flags);
1198
1199 break;
1200 } else if (intr_status & INTR_PENDING) {
1201 ha->isp_ops->interrupt_service_routine(ha, intr_status);
1202 ha->total_io_count++;
1203 if (++reqs_count == MAX_REQS_SERVICED_PER_INTR)
1204 break;
1205 }
1206 }
1207
1208 spin_unlock_irqrestore(&ha->hardware_lock, flags);
1209
1210 return IRQ_HANDLED;
1211 }
1212
1213 /**
1214 * qla4_82xx_intr_handler - hardware interrupt handler.
1215 * @irq: Unused
1216 * @dev_id: Pointer to host adapter structure
1217 **/
1218 irqreturn_t qla4_82xx_intr_handler(int irq, void *dev_id)
1219 {
1220 struct scsi_qla_host *ha = dev_id;
1221 uint32_t intr_status;
1222 uint32_t status;
1223 unsigned long flags = 0;
1224 uint8_t reqs_count = 0;
1225
1226 if (unlikely(pci_channel_offline(ha->pdev)))
1227 return IRQ_HANDLED;
1228
1229 ha->isr_count++;
1230 status = qla4_82xx_rd_32(ha, ISR_INT_VECTOR);
1231 if (!(status & ha->nx_legacy_intr.int_vec_bit))
1232 return IRQ_NONE;
1233
1234 status = qla4_82xx_rd_32(ha, ISR_INT_STATE_REG);
1235 if (!ISR_IS_LEGACY_INTR_TRIGGERED(status)) {
1236 DEBUG7(ql4_printk(KERN_INFO, ha,
1237 "%s legacy Int not triggered\n", __func__));
1238 return IRQ_NONE;
1239 }
1240
1241 /* clear the interrupt */
1242 qla4_82xx_wr_32(ha, ha->nx_legacy_intr.tgt_status_reg, 0xffffffff);
1243
1244 /* read twice to ensure write is flushed */
1245 qla4_82xx_rd_32(ha, ISR_INT_VECTOR);
1246 qla4_82xx_rd_32(ha, ISR_INT_VECTOR);
1247
1248 spin_lock_irqsave(&ha->hardware_lock, flags);
1249 while (1) {
1250 if (!(readl(&ha->qla4_82xx_reg->host_int) &
1251 ISRX_82XX_RISC_INT)) {
1252 qla4_82xx_spurious_interrupt(ha, reqs_count);
1253 break;
1254 }
1255 intr_status = readl(&ha->qla4_82xx_reg->host_status);
1256 if ((intr_status &
1257 (HSRX_RISC_MB_INT | HSRX_RISC_IOCB_INT)) == 0) {
1258 qla4_82xx_spurious_interrupt(ha, reqs_count);
1259 break;
1260 }
1261
1262 ha->isp_ops->interrupt_service_routine(ha, intr_status);
1263
1264 /* Enable Interrupt */
1265 qla4_82xx_wr_32(ha, ha->nx_legacy_intr.tgt_mask_reg, 0xfbff);
1266
1267 if (++reqs_count == MAX_REQS_SERVICED_PER_INTR)
1268 break;
1269 }
1270
1271 spin_unlock_irqrestore(&ha->hardware_lock, flags);
1272 return IRQ_HANDLED;
1273 }
1274
1275 #define LEG_INT_PTR_B31 (1 << 31)
1276 #define LEG_INT_PTR_B30 (1 << 30)
1277 #define PF_BITS_MASK (0xF << 16)
1278
1279 /**
1280 * qla4_83xx_intr_handler - hardware interrupt handler.
1281 * @irq: Unused
1282 * @dev_id: Pointer to host adapter structure
1283 **/
1284 irqreturn_t qla4_83xx_intr_handler(int irq, void *dev_id)
1285 {
1286 struct scsi_qla_host *ha = dev_id;
1287 uint32_t leg_int_ptr = 0;
1288 unsigned long flags = 0;
1289
1290 ha->isr_count++;
1291 leg_int_ptr = readl(&ha->qla4_83xx_reg->leg_int_ptr);
1292
1293 /* Legacy interrupt is valid if bit31 of leg_int_ptr is set */
1294 if (!(leg_int_ptr & LEG_INT_PTR_B31)) {
1295 DEBUG7(ql4_printk(KERN_ERR, ha,
1296 "%s: Legacy Interrupt Bit 31 not set, spurious interrupt!\n",
1297 __func__));
1298 return IRQ_NONE;
1299 }
1300
1301 /* Validate the PCIE function ID set in leg_int_ptr bits [19..16] */
1302 if ((leg_int_ptr & PF_BITS_MASK) != ha->pf_bit) {
1303 DEBUG7(ql4_printk(KERN_ERR, ha,
1304 "%s: Incorrect function ID 0x%x in legacy interrupt register, ha->pf_bit = 0x%x\n",
1305 __func__, (leg_int_ptr & PF_BITS_MASK),
1306 ha->pf_bit));
1307 return IRQ_NONE;
1308 }
1309
1310 /* To de-assert legacy interrupt, write 0 to Legacy Interrupt Trigger
1311 * Control register and poll till Legacy Interrupt Pointer register
1312 * bit30 is 0.
1313 */
1314 writel(0, &ha->qla4_83xx_reg->leg_int_trig);
1315 do {
1316 leg_int_ptr = readl(&ha->qla4_83xx_reg->leg_int_ptr);
1317 if ((leg_int_ptr & PF_BITS_MASK) != ha->pf_bit)
1318 break;
1319 } while (leg_int_ptr & LEG_INT_PTR_B30);
1320
1321 spin_lock_irqsave(&ha->hardware_lock, flags);
1322 leg_int_ptr = readl(&ha->qla4_83xx_reg->risc_intr);
1323 ha->isp_ops->interrupt_service_routine(ha, leg_int_ptr);
1324 spin_unlock_irqrestore(&ha->hardware_lock, flags);
1325
1326 return IRQ_HANDLED;
1327 }
1328
1329 irqreturn_t
1330 qla4_8xxx_msi_handler(int irq, void *dev_id)
1331 {
1332 struct scsi_qla_host *ha;
1333
1334 ha = (struct scsi_qla_host *) dev_id;
1335 if (!ha) {
1336 DEBUG2(printk(KERN_INFO
1337 "qla4xxx: MSIX: Interrupt with NULL host ptr\n"));
1338 return IRQ_NONE;
1339 }
1340
1341 ha->isr_count++;
1342 /* clear the interrupt */
1343 qla4_82xx_wr_32(ha, ha->nx_legacy_intr.tgt_status_reg, 0xffffffff);
1344
1345 /* read twice to ensure write is flushed */
1346 qla4_82xx_rd_32(ha, ISR_INT_VECTOR);
1347 qla4_82xx_rd_32(ha, ISR_INT_VECTOR);
1348
1349 return qla4_8xxx_default_intr_handler(irq, dev_id);
1350 }
1351
1352 static irqreturn_t qla4_83xx_mailbox_intr_handler(int irq, void *dev_id)
1353 {
1354 struct scsi_qla_host *ha = dev_id;
1355 unsigned long flags;
1356 uint32_t ival = 0;
1357
1358 spin_lock_irqsave(&ha->hardware_lock, flags);
1359
1360 ival = readl(&ha->qla4_83xx_reg->risc_intr);
1361 if (ival == 0) {
1362 ql4_printk(KERN_INFO, ha,
1363 "%s: It is a spurious mailbox interrupt!\n",
1364 __func__);
1365 ival = readl(&ha->qla4_83xx_reg->mb_int_mask);
1366 ival &= ~INT_MASK_FW_MB;
1367 writel(ival, &ha->qla4_83xx_reg->mb_int_mask);
1368 goto exit;
1369 }
1370
1371 qla4xxx_isr_decode_mailbox(ha,
1372 readl(&ha->qla4_83xx_reg->mailbox_out[0]));
1373 writel(0, &ha->qla4_83xx_reg->risc_intr);
1374 ival = readl(&ha->qla4_83xx_reg->mb_int_mask);
1375 ival &= ~INT_MASK_FW_MB;
1376 writel(ival, &ha->qla4_83xx_reg->mb_int_mask);
1377 ha->isr_count++;
1378 exit:
1379 spin_unlock_irqrestore(&ha->hardware_lock, flags);
1380 return IRQ_HANDLED;
1381 }
1382
1383 /**
1384 * qla4_8xxx_default_intr_handler - hardware interrupt handler.
1385 * @irq: Unused
1386 * @dev_id: Pointer to host adapter structure
1387 *
1388 * This interrupt handler is called directly for MSI-X, and
1389 * called indirectly for MSI.
1390 **/
1391 irqreturn_t
1392 qla4_8xxx_default_intr_handler(int irq, void *dev_id)
1393 {
1394 struct scsi_qla_host *ha = dev_id;
1395 unsigned long flags;
1396 uint32_t intr_status;
1397 uint8_t reqs_count = 0;
1398
1399 if (is_qla8032(ha) || is_qla8042(ha)) {
1400 qla4_83xx_mailbox_intr_handler(irq, dev_id);
1401 } else {
1402 spin_lock_irqsave(&ha->hardware_lock, flags);
1403 while (1) {
1404 if (!(readl(&ha->qla4_82xx_reg->host_int) &
1405 ISRX_82XX_RISC_INT)) {
1406 qla4_82xx_spurious_interrupt(ha, reqs_count);
1407 break;
1408 }
1409
1410 intr_status = readl(&ha->qla4_82xx_reg->host_status);
1411 if ((intr_status &
1412 (HSRX_RISC_MB_INT | HSRX_RISC_IOCB_INT)) == 0) {
1413 qla4_82xx_spurious_interrupt(ha, reqs_count);
1414 break;
1415 }
1416
1417 ha->isp_ops->interrupt_service_routine(ha, intr_status);
1418
1419 if (++reqs_count == MAX_REQS_SERVICED_PER_INTR)
1420 break;
1421 }
1422 ha->isr_count++;
1423 spin_unlock_irqrestore(&ha->hardware_lock, flags);
1424 }
1425 return IRQ_HANDLED;
1426 }
1427
1428 irqreturn_t
1429 qla4_8xxx_msix_rsp_q(int irq, void *dev_id)
1430 {
1431 struct scsi_qla_host *ha = dev_id;
1432 unsigned long flags;
1433 int intr_status;
1434 uint32_t ival = 0;
1435
1436 spin_lock_irqsave(&ha->hardware_lock, flags);
1437 if (is_qla8032(ha) || is_qla8042(ha)) {
1438 ival = readl(&ha->qla4_83xx_reg->iocb_int_mask);
1439 if (ival == 0) {
1440 ql4_printk(KERN_INFO, ha, "%s: It is a spurious iocb interrupt!\n",
1441 __func__);
1442 goto exit_msix_rsp_q;
1443 }
1444 qla4xxx_process_response_queue(ha);
1445 writel(0, &ha->qla4_83xx_reg->iocb_int_mask);
1446 } else {
1447 intr_status = readl(&ha->qla4_82xx_reg->host_status);
1448 if (intr_status & HSRX_RISC_IOCB_INT) {
1449 qla4xxx_process_response_queue(ha);
1450 writel(0, &ha->qla4_82xx_reg->host_int);
1451 } else {
1452 ql4_printk(KERN_INFO, ha, "%s: spurious iocb interrupt...\n",
1453 __func__);
1454 goto exit_msix_rsp_q;
1455 }
1456 }
1457 ha->isr_count++;
1458 exit_msix_rsp_q:
1459 spin_unlock_irqrestore(&ha->hardware_lock, flags);
1460 return IRQ_HANDLED;
1461 }
1462
1463 /**
1464 * qla4xxx_process_aen - processes AENs generated by firmware
1465 * @ha: pointer to host adapter structure.
1466 * @process_aen: type of AENs to process
1467 *
1468 * Processes specific types of Asynchronous Events generated by firmware.
1469 * The type of AENs to process is specified by process_aen and can be
1470 * PROCESS_ALL_AENS 0
1471 * FLUSH_DDB_CHANGED_AENS 1
1472 * RELOGIN_DDB_CHANGED_AENS 2
1473 **/
1474 void qla4xxx_process_aen(struct scsi_qla_host * ha, uint8_t process_aen)
1475 {
1476 uint32_t mbox_sts[MBOX_AEN_REG_COUNT];
1477 struct aen *aen;
1478 int i;
1479 unsigned long flags;
1480
1481 spin_lock_irqsave(&ha->hardware_lock, flags);
1482 while (ha->aen_out != ha->aen_in) {
1483 aen = &ha->aen_q[ha->aen_out];
1484 /* copy aen information to local structure */
1485 for (i = 0; i < MBOX_AEN_REG_COUNT; i++)
1486 mbox_sts[i] = aen->mbox_sts[i];
1487
1488 ha->aen_q_count++;
1489 ha->aen_out++;
1490
1491 if (ha->aen_out == MAX_AEN_ENTRIES)
1492 ha->aen_out = 0;
1493
1494 spin_unlock_irqrestore(&ha->hardware_lock, flags);
1495
1496 DEBUG2(printk("qla4xxx(%ld): AEN[%d]=0x%08x, mbx1=0x%08x mbx2=0x%08x"
1497 " mbx3=0x%08x mbx4=0x%08x\n", ha->host_no,
1498 (ha->aen_out ? (ha->aen_out-1): (MAX_AEN_ENTRIES-1)),
1499 mbox_sts[0], mbox_sts[1], mbox_sts[2],
1500 mbox_sts[3], mbox_sts[4]));
1501
1502 switch (mbox_sts[0]) {
1503 case MBOX_ASTS_DATABASE_CHANGED:
1504 switch (process_aen) {
1505 case FLUSH_DDB_CHANGED_AENS:
1506 DEBUG2(printk("scsi%ld: AEN[%d] %04x, index "
1507 "[%d] state=%04x FLUSHED!\n",
1508 ha->host_no, ha->aen_out,
1509 mbox_sts[0], mbox_sts[2],
1510 mbox_sts[3]));
1511 break;
1512 case PROCESS_ALL_AENS:
1513 default:
1514 /* Specific device. */
1515 if (mbox_sts[1] == 1)
1516 qla4xxx_process_ddb_changed(ha,
1517 mbox_sts[2], mbox_sts[3],
1518 mbox_sts[4]);
1519 break;
1520 }
1521 }
1522 spin_lock_irqsave(&ha->hardware_lock, flags);
1523 }
1524 spin_unlock_irqrestore(&ha->hardware_lock, flags);
1525 }
1526
1527 int qla4xxx_request_irqs(struct scsi_qla_host *ha)
1528 {
1529 int ret = 0;
1530 int rval = QLA_ERROR;
1531
1532 if (is_qla40XX(ha))
1533 goto try_intx;
1534
1535 if (ql4xenablemsix == 2) {
1536 /* Note: MSI Interrupts not supported for ISP8324 and ISP8042 */
1537 if (is_qla8032(ha) || is_qla8042(ha)) {
1538 ql4_printk(KERN_INFO, ha, "%s: MSI Interrupts not supported for ISP%04x, Falling back-to INTx mode\n",
1539 __func__, ha->pdev->device);
1540 goto try_intx;
1541 }
1542 goto try_msi;
1543 }
1544
1545 if (ql4xenablemsix == 0 || ql4xenablemsix != 1)
1546 goto try_intx;
1547
1548 /* Trying MSI-X */
1549 ret = qla4_8xxx_enable_msix(ha);
1550 if (!ret) {
1551 DEBUG2(ql4_printk(KERN_INFO, ha,
1552 "MSI-X: Enabled (0x%X).\n", ha->revision_id));
1553 goto irq_attached;
1554 } else {
1555 if (is_qla8032(ha) || is_qla8042(ha)) {
1556 ql4_printk(KERN_INFO, ha, "%s: ISP%04x: MSI-X: Falling back-to INTx mode. ret = %d\n",
1557 __func__, ha->pdev->device, ret);
1558 goto try_intx;
1559 }
1560 }
1561
1562 ql4_printk(KERN_WARNING, ha,
1563 "MSI-X: Falling back-to MSI mode -- %d.\n", ret);
1564
1565 try_msi:
1566 /* Trying MSI */
1567 ret = pci_enable_msi(ha->pdev);
1568 if (!ret) {
1569 ret = request_irq(ha->pdev->irq, qla4_8xxx_msi_handler,
1570 0, DRIVER_NAME, ha);
1571 if (!ret) {
1572 DEBUG2(ql4_printk(KERN_INFO, ha, "MSI: Enabled.\n"));
1573 set_bit(AF_MSI_ENABLED, &ha->flags);
1574 goto irq_attached;
1575 } else {
1576 ql4_printk(KERN_WARNING, ha,
1577 "MSI: Failed to reserve interrupt %d "
1578 "already in use.\n", ha->pdev->irq);
1579 pci_disable_msi(ha->pdev);
1580 }
1581 }
1582
1583 try_intx:
1584 if (is_qla8022(ha)) {
1585 ql4_printk(KERN_WARNING, ha, "%s: ISP82xx Legacy interrupt not supported\n",
1586 __func__);
1587 goto irq_not_attached;
1588 }
1589
1590 /* Trying INTx */
1591 ret = request_irq(ha->pdev->irq, ha->isp_ops->intr_handler,
1592 IRQF_SHARED, DRIVER_NAME, ha);
1593 if (!ret) {
1594 DEBUG2(ql4_printk(KERN_INFO, ha, "INTx: Enabled.\n"));
1595 set_bit(AF_INTx_ENABLED, &ha->flags);
1596 goto irq_attached;
1597
1598 } else {
1599 ql4_printk(KERN_WARNING, ha,
1600 "INTx: Failed to reserve interrupt %d already in"
1601 " use.\n", ha->pdev->irq);
1602 goto irq_not_attached;
1603 }
1604
1605 irq_attached:
1606 set_bit(AF_IRQ_ATTACHED, &ha->flags);
1607 ha->host->irq = ha->pdev->irq;
1608 ql4_printk(KERN_INFO, ha, "%s: irq %d attached\n",
1609 __func__, ha->pdev->irq);
1610 rval = QLA_SUCCESS;
1611 irq_not_attached:
1612 return rval;
1613 }
1614
1615 void qla4xxx_free_irqs(struct scsi_qla_host *ha)
1616 {
1617 if (test_and_clear_bit(AF_IRQ_ATTACHED, &ha->flags)) {
1618 if (test_bit(AF_MSIX_ENABLED, &ha->flags)) {
1619 qla4_8xxx_disable_msix(ha);
1620 } else if (test_and_clear_bit(AF_MSI_ENABLED, &ha->flags)) {
1621 free_irq(ha->pdev->irq, ha);
1622 pci_disable_msi(ha->pdev);
1623 } else if (test_and_clear_bit(AF_INTx_ENABLED, &ha->flags)) {
1624 free_irq(ha->pdev->irq, ha);
1625 }
1626 }
1627 }
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