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x86/xen: resume timer irqs early
[linux/fpc-iii.git] / drivers / scsi / qla4xxx / ql4_isr.c
blob7dff09f09b7130d41411969229898281a1bd7723
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:%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 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
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->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->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 /**
610 * qla4xxx_isr_decode_mailbox - decodes mailbox status
611 * @ha: Pointer to host adapter structure.
612 * @mailbox_status: Mailbox status.
613 *
614 * This routine decodes the mailbox status during the ISR.
615 * Hardware_lock locked upon entry. runs in interrupt context.
616 **/
617 static void qla4xxx_isr_decode_mailbox(struct scsi_qla_host * ha,
618 uint32_t mbox_status)
619 {
620 int i;
621 uint32_t mbox_sts[MBOX_AEN_REG_COUNT];
622 __le32 __iomem *mailbox_out;
623
624 if (is_qla8032(ha) || is_qla8042(ha))
625 mailbox_out = &ha->qla4_83xx_reg->mailbox_out[0];
626 else if (is_qla8022(ha))
627 mailbox_out = &ha->qla4_82xx_reg->mailbox_out[0];
628 else
629 mailbox_out = &ha->reg->mailbox[0];
630
631 if ((mbox_status == MBOX_STS_BUSY) ||
632 (mbox_status == MBOX_STS_INTERMEDIATE_COMPLETION) ||
633 (mbox_status >> 12 == MBOX_COMPLETION_STATUS)) {
634 ha->mbox_status[0] = mbox_status;
635
636 if (test_bit(AF_MBOX_COMMAND, &ha->flags)) {
637 /*
638 * Copy all mailbox registers to a temporary
639 * location and set mailbox command done flag
640 */
641 for (i = 0; i < ha->mbox_status_count; i++)
642 ha->mbox_status[i] = readl(&mailbox_out[i]);
643
644 set_bit(AF_MBOX_COMMAND_DONE, &ha->flags);
645
646 if (test_bit(AF_MBOX_COMMAND_NOPOLL, &ha->flags))
647 complete(&ha->mbx_intr_comp);
648 }
649 } else if (mbox_status >> 12 == MBOX_ASYNC_EVENT_STATUS) {
650 for (i = 0; i < MBOX_AEN_REG_COUNT; i++)
651 mbox_sts[i] = readl(&mailbox_out[i]);
652
653 /* Immediately process the AENs that don't require much work.
654 * Only queue the database_changed AENs */
655 if (ha->aen_log.count < MAX_AEN_ENTRIES) {
656 for (i = 0; i < MBOX_AEN_REG_COUNT; i++)
657 ha->aen_log.entry[ha->aen_log.count].mbox_sts[i] =
658 mbox_sts[i];
659 ha->aen_log.count++;
660 }
661 switch (mbox_status) {
662 case MBOX_ASTS_SYSTEM_ERROR:
663 /* Log Mailbox registers */
664 ql4_printk(KERN_INFO, ha, "%s: System Err\n", __func__);
665 qla4xxx_dump_registers(ha);
666
667 if ((is_qla8022(ha) && ql4xdontresethba) ||
668 ((is_qla8032(ha) || is_qla8042(ha)) &&
669 qla4_83xx_idc_dontreset(ha))) {
670 DEBUG2(printk("scsi%ld: %s:Don't Reset HBA\n",
671 ha->host_no, __func__));
672 } else {
673 set_bit(AF_GET_CRASH_RECORD, &ha->flags);
674 set_bit(DPC_RESET_HA, &ha->dpc_flags);
675 }
676 break;
677
678 case MBOX_ASTS_REQUEST_TRANSFER_ERROR:
679 case MBOX_ASTS_RESPONSE_TRANSFER_ERROR:
680 case MBOX_ASTS_NVRAM_INVALID:
681 case MBOX_ASTS_IP_ADDRESS_CHANGED:
682 case MBOX_ASTS_DHCP_LEASE_EXPIRED:
683 DEBUG2(printk("scsi%ld: AEN %04x, ERROR Status, "
684 "Reset HA\n", ha->host_no, mbox_status));
685 if (is_qla80XX(ha))
686 set_bit(DPC_RESET_HA_FW_CONTEXT,
687 &ha->dpc_flags);
688 else
689 set_bit(DPC_RESET_HA, &ha->dpc_flags);
690 break;
691
692 case MBOX_ASTS_LINK_UP:
693 set_bit(AF_LINK_UP, &ha->flags);
694 if (test_bit(AF_INIT_DONE, &ha->flags))
695 set_bit(DPC_LINK_CHANGED, &ha->dpc_flags);
696
697 ql4_printk(KERN_INFO, ha, "%s: LINK UP\n", __func__);
698 qla4xxx_post_aen_work(ha, ISCSI_EVENT_LINKUP,
699 sizeof(mbox_sts),
700 (uint8_t *) mbox_sts);
701 break;
702
703 case MBOX_ASTS_LINK_DOWN:
704 clear_bit(AF_LINK_UP, &ha->flags);
705 if (test_bit(AF_INIT_DONE, &ha->flags)) {
706 set_bit(DPC_LINK_CHANGED, &ha->dpc_flags);
707 qla4xxx_wake_dpc(ha);
708 }
709
710 ql4_printk(KERN_INFO, ha, "%s: LINK DOWN\n", __func__);
711 qla4xxx_post_aen_work(ha, ISCSI_EVENT_LINKDOWN,
712 sizeof(mbox_sts),
713 (uint8_t *) mbox_sts);
714 break;
715
716 case MBOX_ASTS_HEARTBEAT:
717 ha->seconds_since_last_heartbeat = 0;
718 break;
719
720 case MBOX_ASTS_DHCP_LEASE_ACQUIRED:
721 DEBUG2(printk("scsi%ld: AEN %04x DHCP LEASE "
722 "ACQUIRED\n", ha->host_no, mbox_status));
723 set_bit(DPC_GET_DHCP_IP_ADDR, &ha->dpc_flags);
724 break;
725
726 case MBOX_ASTS_PROTOCOL_STATISTIC_ALARM:
727 case MBOX_ASTS_SCSI_COMMAND_PDU_REJECTED: /* Target
728 * mode
729 * only */
730 case MBOX_ASTS_UNSOLICITED_PDU_RECEIVED: /* Connection mode */
731 case MBOX_ASTS_IPSEC_SYSTEM_FATAL_ERROR:
732 case MBOX_ASTS_SUBNET_STATE_CHANGE:
733 case MBOX_ASTS_DUPLICATE_IP:
734 /* No action */
735 DEBUG2(printk("scsi%ld: AEN %04x\n", ha->host_no,
736 mbox_status));
737 break;
738
739 case MBOX_ASTS_IP_ADDR_STATE_CHANGED:
740 printk("scsi%ld: AEN %04x, mbox_sts[2]=%04x, "
741 "mbox_sts[3]=%04x\n", ha->host_no, mbox_sts[0],
742 mbox_sts[2], mbox_sts[3]);
743
744 /* mbox_sts[2] = Old ACB state
745 * mbox_sts[3] = new ACB state */
746 if ((mbox_sts[3] == ACB_STATE_VALID) &&
747 ((mbox_sts[2] == ACB_STATE_TENTATIVE) ||
748 (mbox_sts[2] == ACB_STATE_ACQUIRING))) {
749 set_bit(DPC_GET_DHCP_IP_ADDR, &ha->dpc_flags);
750 } else if ((mbox_sts[3] == ACB_STATE_ACQUIRING) &&
751 (mbox_sts[2] == ACB_STATE_VALID)) {
752 if (is_qla80XX(ha))
753 set_bit(DPC_RESET_HA_FW_CONTEXT,
754 &ha->dpc_flags);
755 else
756 set_bit(DPC_RESET_HA, &ha->dpc_flags);
757 } else if (mbox_sts[3] == ACB_STATE_DISABLING) {
758 ql4_printk(KERN_INFO, ha, "scsi%ld: %s: ACB in disabling state\n",
759 ha->host_no, __func__);
760 } else if ((mbox_sts[3] == ACB_STATE_UNCONFIGURED)) {
761 complete(&ha->disable_acb_comp);
762 ql4_printk(KERN_INFO, ha, "scsi%ld: %s: ACB state unconfigured\n",
763 ha->host_no, __func__);
764 }
765 break;
766
767 case MBOX_ASTS_MAC_ADDRESS_CHANGED:
768 case MBOX_ASTS_DNS:
769 /* No action */
770 DEBUG2(printk(KERN_INFO "scsi%ld: AEN %04x, "
771 "mbox_sts[1]=%04x, mbox_sts[2]=%04x\n",
772 ha->host_no, mbox_sts[0],
773 mbox_sts[1], mbox_sts[2]));
774 break;
775
776 case MBOX_ASTS_SELF_TEST_FAILED:
777 case MBOX_ASTS_LOGIN_FAILED:
778 /* No action */
779 DEBUG2(printk("scsi%ld: AEN %04x, mbox_sts[1]=%04x, "
780 "mbox_sts[2]=%04x, mbox_sts[3]=%04x\n",
781 ha->host_no, mbox_sts[0], mbox_sts[1],
782 mbox_sts[2], mbox_sts[3]));
783 break;
784
785 case MBOX_ASTS_DATABASE_CHANGED:
786 /* Queue AEN information and process it in the DPC
787 * routine */
788 if (ha->aen_q_count > 0) {
789
790 /* decrement available counter */
791 ha->aen_q_count--;
792
793 for (i = 0; i < MBOX_AEN_REG_COUNT; i++)
794 ha->aen_q[ha->aen_in].mbox_sts[i] =
795 mbox_sts[i];
796
797 /* print debug message */
798 DEBUG2(printk("scsi%ld: AEN[%d] %04x queued "
799 "mb1:0x%x mb2:0x%x mb3:0x%x "
800 "mb4:0x%x mb5:0x%x\n",
801 ha->host_no, ha->aen_in,
802 mbox_sts[0], mbox_sts[1],
803 mbox_sts[2], mbox_sts[3],
804 mbox_sts[4], mbox_sts[5]));
805
806 /* advance pointer */
807 ha->aen_in++;
808 if (ha->aen_in == MAX_AEN_ENTRIES)
809 ha->aen_in = 0;
810
811 /* The DPC routine will process the aen */
812 set_bit(DPC_AEN, &ha->dpc_flags);
813 } else {
814 DEBUG2(printk("scsi%ld: %s: aen %04x, queue "
815 "overflowed! AEN LOST!!\n",
816 ha->host_no, __func__,
817 mbox_sts[0]));
818
819 DEBUG2(printk("scsi%ld: DUMP AEN QUEUE\n",
820 ha->host_no));
821
822 for (i = 0; i < MAX_AEN_ENTRIES; i++) {
823 DEBUG2(printk("AEN[%d] %04x %04x %04x "
824 "%04x\n", i, mbox_sts[0],
825 mbox_sts[1], mbox_sts[2],
826 mbox_sts[3]));
827 }
828 }
829 break;
830
831 case MBOX_ASTS_TXSCVR_INSERTED:
832 DEBUG2(printk(KERN_WARNING
833 "scsi%ld: AEN %04x Transceiver"
834 " inserted\n", ha->host_no, mbox_sts[0]));
835 break;
836
837 case MBOX_ASTS_TXSCVR_REMOVED:
838 DEBUG2(printk(KERN_WARNING
839 "scsi%ld: AEN %04x Transceiver"
840 " removed\n", ha->host_no, mbox_sts[0]));
841 break;
842
843 case MBOX_ASTS_IDC_REQUEST_NOTIFICATION:
844 {
845 uint32_t opcode;
846 if (is_qla8032(ha) || is_qla8042(ha)) {
847 DEBUG2(ql4_printk(KERN_INFO, ha,
848 "scsi%ld: AEN %04x, mbox_sts[1]=%08x, mbox_sts[2]=%08x, mbox_sts[3]=%08x, mbox_sts[4]=%08x\n",
849 ha->host_no, mbox_sts[0],
850 mbox_sts[1], mbox_sts[2],
851 mbox_sts[3], mbox_sts[4]));
852 opcode = mbox_sts[1] >> 16;
853 if ((opcode == MBOX_CMD_SET_PORT_CONFIG) ||
854 (opcode == MBOX_CMD_PORT_RESET)) {
855 set_bit(DPC_POST_IDC_ACK,
856 &ha->dpc_flags);
857 ha->idc_info.request_desc = mbox_sts[1];
858 ha->idc_info.info1 = mbox_sts[2];
859 ha->idc_info.info2 = mbox_sts[3];
860 ha->idc_info.info3 = mbox_sts[4];
861 qla4xxx_wake_dpc(ha);
862 }
863 }
864 break;
865 }
866
867 case MBOX_ASTS_IDC_COMPLETE:
868 if (is_qla8032(ha) || is_qla8042(ha)) {
869 DEBUG2(ql4_printk(KERN_INFO, ha,
870 "scsi%ld: AEN %04x, mbox_sts[1]=%08x, mbox_sts[2]=%08x, mbox_sts[3]=%08x, mbox_sts[4]=%08x\n",
871 ha->host_no, mbox_sts[0],
872 mbox_sts[1], mbox_sts[2],
873 mbox_sts[3], mbox_sts[4]));
874 DEBUG2(ql4_printk(KERN_INFO, ha,
875 "scsi:%ld: AEN %04x IDC Complete notification\n",
876 ha->host_no, mbox_sts[0]));
877
878 if (qla4_83xx_loopback_in_progress(ha)) {
879 set_bit(AF_LOOPBACK, &ha->flags);
880 } else {
881 clear_bit(AF_LOOPBACK, &ha->flags);
882 if (ha->saved_acb)
883 set_bit(DPC_RESTORE_ACB,
884 &ha->dpc_flags);
885 }
886 qla4xxx_wake_dpc(ha);
887 }
888 break;
889
890 case MBOX_ASTS_IPV6_DEFAULT_ROUTER_CHANGED:
891 DEBUG2(ql4_printk(KERN_INFO, ha,
892 "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",
893 ha->host_no, mbox_sts[0], mbox_sts[1],
894 mbox_sts[2], mbox_sts[3], mbox_sts[4],
895 mbox_sts[5]));
896 DEBUG2(ql4_printk(KERN_INFO, ha,
897 "scsi%ld: AEN %04x Received IPv6 default router changed notification\n",
898 ha->host_no, mbox_sts[0]));
899 break;
900
901 case MBOX_ASTS_IDC_TIME_EXTEND_NOTIFICATION:
902 DEBUG2(ql4_printk(KERN_INFO, ha,
903 "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",
904 ha->host_no, mbox_sts[0], mbox_sts[1],
905 mbox_sts[2], mbox_sts[3], mbox_sts[4],
906 mbox_sts[5]));
907 DEBUG2(ql4_printk(KERN_INFO, ha,
908 "scsi%ld: AEN %04x Received IDC Extend Timeout notification\n",
909 ha->host_no, mbox_sts[0]));
910 break;
911
912 case MBOX_ASTS_INITIALIZATION_FAILED:
913 DEBUG2(ql4_printk(KERN_INFO, ha,
914 "scsi%ld: AEN %04x, mbox_sts[3]=%08x\n",
915 ha->host_no, mbox_sts[0],
916 mbox_sts[3]));
917 break;
918
919 case MBOX_ASTS_SYSTEM_WARNING_EVENT:
920 DEBUG2(ql4_printk(KERN_WARNING, ha,
921 "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",
922 ha->host_no, mbox_sts[0], mbox_sts[1],
923 mbox_sts[2], mbox_sts[3], mbox_sts[4],
924 mbox_sts[5]));
925 break;
926
927 case MBOX_ASTS_DCBX_CONF_CHANGE:
928 DEBUG2(ql4_printk(KERN_INFO, ha,
929 "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",
930 ha->host_no, mbox_sts[0], mbox_sts[1],
931 mbox_sts[2], mbox_sts[3], mbox_sts[4],
932 mbox_sts[5]));
933 DEBUG2(ql4_printk(KERN_INFO, ha,
934 "scsi%ld: AEN %04x Received DCBX configuration changed notification\n",
935 ha->host_no, mbox_sts[0]));
936 break;
937
938 default:
939 DEBUG2(printk(KERN_WARNING
940 "scsi%ld: AEN %04x UNKNOWN\n",
941 ha->host_no, mbox_sts[0]));
942 break;
943 }
944 } else {
945 DEBUG2(printk("scsi%ld: Unknown mailbox status %08X\n",
946 ha->host_no, mbox_status));
947
948 ha->mbox_status[0] = mbox_status;
949 }
950 }
951
952 void qla4_83xx_interrupt_service_routine(struct scsi_qla_host *ha,
953 uint32_t intr_status)
954 {
955 /* Process mailbox/asynch event interrupt.*/
956 if (intr_status) {
957 qla4xxx_isr_decode_mailbox(ha,
958 readl(&ha->qla4_83xx_reg->mailbox_out[0]));
959 /* clear the interrupt */
960 writel(0, &ha->qla4_83xx_reg->risc_intr);
961 } else {
962 qla4xxx_process_response_queue(ha);
963 }
964
965 /* clear the interrupt */
966 writel(0, &ha->qla4_83xx_reg->mb_int_mask);
967 }
968
969 /**
970 * qla4_82xx_interrupt_service_routine - isr
971 * @ha: pointer to host adapter structure.
972 *
973 * This is the main interrupt service routine.
974 * hardware_lock locked upon entry. runs in interrupt context.
975 **/
976 void qla4_82xx_interrupt_service_routine(struct scsi_qla_host *ha,
977 uint32_t intr_status)
978 {
979 /* Process response queue interrupt. */
980 if (intr_status & HSRX_RISC_IOCB_INT)
981 qla4xxx_process_response_queue(ha);
982
983 /* Process mailbox/asynch event interrupt.*/
984 if (intr_status & HSRX_RISC_MB_INT)
985 qla4xxx_isr_decode_mailbox(ha,
986 readl(&ha->qla4_82xx_reg->mailbox_out[0]));
987
988 /* clear the interrupt */
989 writel(0, &ha->qla4_82xx_reg->host_int);
990 readl(&ha->qla4_82xx_reg->host_int);
991 }
992
993 /**
994 * qla4xxx_interrupt_service_routine - isr
995 * @ha: pointer to host adapter structure.
996 *
997 * This is the main interrupt service routine.
998 * hardware_lock locked upon entry. runs in interrupt context.
999 **/
1000 void qla4xxx_interrupt_service_routine(struct scsi_qla_host * ha,
1001 uint32_t intr_status)
1002 {
1003 /* Process response queue interrupt. */
1004 if (intr_status & CSR_SCSI_COMPLETION_INTR)
1005 qla4xxx_process_response_queue(ha);
1006
1007 /* Process mailbox/asynch event interrupt.*/
1008 if (intr_status & CSR_SCSI_PROCESSOR_INTR) {
1009 qla4xxx_isr_decode_mailbox(ha,
1010 readl(&ha->reg->mailbox[0]));
1011
1012 /* Clear Mailbox Interrupt */
1013 writel(set_rmask(CSR_SCSI_PROCESSOR_INTR),
1014 &ha->reg->ctrl_status);
1015 readl(&ha->reg->ctrl_status);
1016 }
1017 }
1018
1019 /**
1020 * qla4_82xx_spurious_interrupt - processes spurious interrupt
1021 * @ha: pointer to host adapter structure.
1022 * @reqs_count: .
1023 *
1024 **/
1025 static void qla4_82xx_spurious_interrupt(struct scsi_qla_host *ha,
1026 uint8_t reqs_count)
1027 {
1028 if (reqs_count)
1029 return;
1030
1031 DEBUG2(ql4_printk(KERN_INFO, ha, "Spurious Interrupt\n"));
1032 if (is_qla8022(ha)) {
1033 writel(0, &ha->qla4_82xx_reg->host_int);
1034 if (test_bit(AF_INTx_ENABLED, &ha->flags))
1035 qla4_82xx_wr_32(ha, ha->nx_legacy_intr.tgt_mask_reg,
1036 0xfbff);
1037 }
1038 ha->spurious_int_count++;
1039 }
1040
1041 /**
1042 * qla4xxx_intr_handler - hardware interrupt handler.
1043 * @irq: Unused
1044 * @dev_id: Pointer to host adapter structure
1045 **/
1046 irqreturn_t qla4xxx_intr_handler(int irq, void *dev_id)
1047 {
1048 struct scsi_qla_host *ha;
1049 uint32_t intr_status;
1050 unsigned long flags = 0;
1051 uint8_t reqs_count = 0;
1052
1053 ha = (struct scsi_qla_host *) dev_id;
1054 if (!ha) {
1055 DEBUG2(printk(KERN_INFO
1056 "qla4xxx: Interrupt with NULL host ptr\n"));
1057 return IRQ_NONE;
1058 }
1059
1060 spin_lock_irqsave(&ha->hardware_lock, flags);
1061
1062 ha->isr_count++;
1063 /*
1064 * Repeatedly service interrupts up to a maximum of
1065 * MAX_REQS_SERVICED_PER_INTR
1066 */
1067 while (1) {
1068 /*
1069 * Read interrupt status
1070 */
1071 if (ha->isp_ops->rd_shdw_rsp_q_in(ha) !=
1072 ha->response_out)
1073 intr_status = CSR_SCSI_COMPLETION_INTR;
1074 else
1075 intr_status = readl(&ha->reg->ctrl_status);
1076
1077 if ((intr_status &
1078 (CSR_SCSI_RESET_INTR|CSR_FATAL_ERROR|INTR_PENDING)) == 0) {
1079 if (reqs_count == 0)
1080 ha->spurious_int_count++;
1081 break;
1082 }
1083
1084 if (intr_status & CSR_FATAL_ERROR) {
1085 DEBUG2(printk(KERN_INFO "scsi%ld: Fatal Error, "
1086 "Status 0x%04x\n", ha->host_no,
1087 readl(isp_port_error_status (ha))));
1088
1089 /* Issue Soft Reset to clear this error condition.
1090 * This will prevent the RISC from repeatedly
1091 * interrupting the driver; thus, allowing the DPC to
1092 * get scheduled to continue error recovery.
1093 * NOTE: Disabling RISC interrupts does not work in
1094 * this case, as CSR_FATAL_ERROR overrides
1095 * CSR_SCSI_INTR_ENABLE */
1096 if ((readl(&ha->reg->ctrl_status) &
1097 CSR_SCSI_RESET_INTR) == 0) {
1098 writel(set_rmask(CSR_SOFT_RESET),
1099 &ha->reg->ctrl_status);
1100 readl(&ha->reg->ctrl_status);
1101 }
1102
1103 writel(set_rmask(CSR_FATAL_ERROR),
1104 &ha->reg->ctrl_status);
1105 readl(&ha->reg->ctrl_status);
1106
1107 __qla4xxx_disable_intrs(ha);
1108
1109 set_bit(DPC_RESET_HA, &ha->dpc_flags);
1110
1111 break;
1112 } else if (intr_status & CSR_SCSI_RESET_INTR) {
1113 clear_bit(AF_ONLINE, &ha->flags);
1114 __qla4xxx_disable_intrs(ha);
1115
1116 writel(set_rmask(CSR_SCSI_RESET_INTR),
1117 &ha->reg->ctrl_status);
1118 readl(&ha->reg->ctrl_status);
1119
1120 if (!test_bit(AF_HA_REMOVAL, &ha->flags))
1121 set_bit(DPC_RESET_HA_INTR, &ha->dpc_flags);
1122
1123 break;
1124 } else if (intr_status & INTR_PENDING) {
1125 ha->isp_ops->interrupt_service_routine(ha, intr_status);
1126 ha->total_io_count++;
1127 if (++reqs_count == MAX_REQS_SERVICED_PER_INTR)
1128 break;
1129 }
1130 }
1131
1132 spin_unlock_irqrestore(&ha->hardware_lock, flags);
1133
1134 return IRQ_HANDLED;
1135 }
1136
1137 /**
1138 * qla4_82xx_intr_handler - hardware interrupt handler.
1139 * @irq: Unused
1140 * @dev_id: Pointer to host adapter structure
1141 **/
1142 irqreturn_t qla4_82xx_intr_handler(int irq, void *dev_id)
1143 {
1144 struct scsi_qla_host *ha = dev_id;
1145 uint32_t intr_status;
1146 uint32_t status;
1147 unsigned long flags = 0;
1148 uint8_t reqs_count = 0;
1149
1150 if (unlikely(pci_channel_offline(ha->pdev)))
1151 return IRQ_HANDLED;
1152
1153 ha->isr_count++;
1154 status = qla4_82xx_rd_32(ha, ISR_INT_VECTOR);
1155 if (!(status & ha->nx_legacy_intr.int_vec_bit))
1156 return IRQ_NONE;
1157
1158 status = qla4_82xx_rd_32(ha, ISR_INT_STATE_REG);
1159 if (!ISR_IS_LEGACY_INTR_TRIGGERED(status)) {
1160 DEBUG7(ql4_printk(KERN_INFO, ha,
1161 "%s legacy Int not triggered\n", __func__));
1162 return IRQ_NONE;
1163 }
1164
1165 /* clear the interrupt */
1166 qla4_82xx_wr_32(ha, ha->nx_legacy_intr.tgt_status_reg, 0xffffffff);
1167
1168 /* read twice to ensure write is flushed */
1169 qla4_82xx_rd_32(ha, ISR_INT_VECTOR);
1170 qla4_82xx_rd_32(ha, ISR_INT_VECTOR);
1171
1172 spin_lock_irqsave(&ha->hardware_lock, flags);
1173 while (1) {
1174 if (!(readl(&ha->qla4_82xx_reg->host_int) &
1175 ISRX_82XX_RISC_INT)) {
1176 qla4_82xx_spurious_interrupt(ha, reqs_count);
1177 break;
1178 }
1179 intr_status = readl(&ha->qla4_82xx_reg->host_status);
1180 if ((intr_status &
1181 (HSRX_RISC_MB_INT | HSRX_RISC_IOCB_INT)) == 0) {
1182 qla4_82xx_spurious_interrupt(ha, reqs_count);
1183 break;
1184 }
1185
1186 ha->isp_ops->interrupt_service_routine(ha, intr_status);
1187
1188 /* Enable Interrupt */
1189 qla4_82xx_wr_32(ha, ha->nx_legacy_intr.tgt_mask_reg, 0xfbff);
1190
1191 if (++reqs_count == MAX_REQS_SERVICED_PER_INTR)
1192 break;
1193 }
1194
1195 spin_unlock_irqrestore(&ha->hardware_lock, flags);
1196 return IRQ_HANDLED;
1197 }
1198
1199 #define LEG_INT_PTR_B31 (1 << 31)
1200 #define LEG_INT_PTR_B30 (1 << 30)
1201 #define PF_BITS_MASK (0xF << 16)
1202
1203 /**
1204 * qla4_83xx_intr_handler - hardware interrupt handler.
1205 * @irq: Unused
1206 * @dev_id: Pointer to host adapter structure
1207 **/
1208 irqreturn_t qla4_83xx_intr_handler(int irq, void *dev_id)
1209 {
1210 struct scsi_qla_host *ha = dev_id;
1211 uint32_t leg_int_ptr = 0;
1212 unsigned long flags = 0;
1213
1214 ha->isr_count++;
1215 leg_int_ptr = readl(&ha->qla4_83xx_reg->leg_int_ptr);
1216
1217 /* Legacy interrupt is valid if bit31 of leg_int_ptr is set */
1218 if (!(leg_int_ptr & LEG_INT_PTR_B31)) {
1219 DEBUG7(ql4_printk(KERN_ERR, ha,
1220 "%s: Legacy Interrupt Bit 31 not set, spurious interrupt!\n",
1221 __func__));
1222 return IRQ_NONE;
1223 }
1224
1225 /* Validate the PCIE function ID set in leg_int_ptr bits [19..16] */
1226 if ((leg_int_ptr & PF_BITS_MASK) != ha->pf_bit) {
1227 DEBUG7(ql4_printk(KERN_ERR, ha,
1228 "%s: Incorrect function ID 0x%x in legacy interrupt register, ha->pf_bit = 0x%x\n",
1229 __func__, (leg_int_ptr & PF_BITS_MASK),
1230 ha->pf_bit));
1231 return IRQ_NONE;
1232 }
1233
1234 /* To de-assert legacy interrupt, write 0 to Legacy Interrupt Trigger
1235 * Control register and poll till Legacy Interrupt Pointer register
1236 * bit30 is 0.
1237 */
1238 writel(0, &ha->qla4_83xx_reg->leg_int_trig);
1239 do {
1240 leg_int_ptr = readl(&ha->qla4_83xx_reg->leg_int_ptr);
1241 if ((leg_int_ptr & PF_BITS_MASK) != ha->pf_bit)
1242 break;
1243 } while (leg_int_ptr & LEG_INT_PTR_B30);
1244
1245 spin_lock_irqsave(&ha->hardware_lock, flags);
1246 leg_int_ptr = readl(&ha->qla4_83xx_reg->risc_intr);
1247 ha->isp_ops->interrupt_service_routine(ha, leg_int_ptr);
1248 spin_unlock_irqrestore(&ha->hardware_lock, flags);
1249
1250 return IRQ_HANDLED;
1251 }
1252
1253 irqreturn_t
1254 qla4_8xxx_msi_handler(int irq, void *dev_id)
1255 {
1256 struct scsi_qla_host *ha;
1257
1258 ha = (struct scsi_qla_host *) dev_id;
1259 if (!ha) {
1260 DEBUG2(printk(KERN_INFO
1261 "qla4xxx: MSIX: Interrupt with NULL host ptr\n"));
1262 return IRQ_NONE;
1263 }
1264
1265 ha->isr_count++;
1266 /* clear the interrupt */
1267 qla4_82xx_wr_32(ha, ha->nx_legacy_intr.tgt_status_reg, 0xffffffff);
1268
1269 /* read twice to ensure write is flushed */
1270 qla4_82xx_rd_32(ha, ISR_INT_VECTOR);
1271 qla4_82xx_rd_32(ha, ISR_INT_VECTOR);
1272
1273 return qla4_8xxx_default_intr_handler(irq, dev_id);
1274 }
1275
1276 static irqreturn_t qla4_83xx_mailbox_intr_handler(int irq, void *dev_id)
1277 {
1278 struct scsi_qla_host *ha = dev_id;
1279 unsigned long flags;
1280 uint32_t ival = 0;
1281
1282 spin_lock_irqsave(&ha->hardware_lock, flags);
1283
1284 ival = readl(&ha->qla4_83xx_reg->risc_intr);
1285 if (ival == 0) {
1286 ql4_printk(KERN_INFO, ha,
1287 "%s: It is a spurious mailbox interrupt!\n",
1288 __func__);
1289 ival = readl(&ha->qla4_83xx_reg->mb_int_mask);
1290 ival &= ~INT_MASK_FW_MB;
1291 writel(ival, &ha->qla4_83xx_reg->mb_int_mask);
1292 goto exit;
1293 }
1294
1295 qla4xxx_isr_decode_mailbox(ha,
1296 readl(&ha->qla4_83xx_reg->mailbox_out[0]));
1297 writel(0, &ha->qla4_83xx_reg->risc_intr);
1298 ival = readl(&ha->qla4_83xx_reg->mb_int_mask);
1299 ival &= ~INT_MASK_FW_MB;
1300 writel(ival, &ha->qla4_83xx_reg->mb_int_mask);
1301 ha->isr_count++;
1302 exit:
1303 spin_unlock_irqrestore(&ha->hardware_lock, flags);
1304 return IRQ_HANDLED;
1305 }
1306
1307 /**
1308 * qla4_8xxx_default_intr_handler - hardware interrupt handler.
1309 * @irq: Unused
1310 * @dev_id: Pointer to host adapter structure
1311 *
1312 * This interrupt handler is called directly for MSI-X, and
1313 * called indirectly for MSI.
1314 **/
1315 irqreturn_t
1316 qla4_8xxx_default_intr_handler(int irq, void *dev_id)
1317 {
1318 struct scsi_qla_host *ha = dev_id;
1319 unsigned long flags;
1320 uint32_t intr_status;
1321 uint8_t reqs_count = 0;
1322
1323 if (is_qla8032(ha) || is_qla8042(ha)) {
1324 qla4_83xx_mailbox_intr_handler(irq, dev_id);
1325 } else {
1326 spin_lock_irqsave(&ha->hardware_lock, flags);
1327 while (1) {
1328 if (!(readl(&ha->qla4_82xx_reg->host_int) &
1329 ISRX_82XX_RISC_INT)) {
1330 qla4_82xx_spurious_interrupt(ha, reqs_count);
1331 break;
1332 }
1333
1334 intr_status = readl(&ha->qla4_82xx_reg->host_status);
1335 if ((intr_status &
1336 (HSRX_RISC_MB_INT | HSRX_RISC_IOCB_INT)) == 0) {
1337 qla4_82xx_spurious_interrupt(ha, reqs_count);
1338 break;
1339 }
1340
1341 ha->isp_ops->interrupt_service_routine(ha, intr_status);
1342
1343 if (++reqs_count == MAX_REQS_SERVICED_PER_INTR)
1344 break;
1345 }
1346 ha->isr_count++;
1347 spin_unlock_irqrestore(&ha->hardware_lock, flags);
1348 }
1349 return IRQ_HANDLED;
1350 }
1351
1352 irqreturn_t
1353 qla4_8xxx_msix_rsp_q(int irq, void *dev_id)
1354 {
1355 struct scsi_qla_host *ha = dev_id;
1356 unsigned long flags;
1357 uint32_t ival = 0;
1358
1359 spin_lock_irqsave(&ha->hardware_lock, flags);
1360 if (is_qla8032(ha) || is_qla8042(ha)) {
1361 ival = readl(&ha->qla4_83xx_reg->iocb_int_mask);
1362 if (ival == 0) {
1363 ql4_printk(KERN_INFO, ha, "%s: It is a spurious iocb interrupt!\n",
1364 __func__);
1365 goto exit_msix_rsp_q;
1366 }
1367 qla4xxx_process_response_queue(ha);
1368 writel(0, &ha->qla4_83xx_reg->iocb_int_mask);
1369 } else {
1370 qla4xxx_process_response_queue(ha);
1371 writel(0, &ha->qla4_82xx_reg->host_int);
1372 }
1373 ha->isr_count++;
1374 exit_msix_rsp_q:
1375 spin_unlock_irqrestore(&ha->hardware_lock, flags);
1376 return IRQ_HANDLED;
1377 }
1378
1379 /**
1380 * qla4xxx_process_aen - processes AENs generated by firmware
1381 * @ha: pointer to host adapter structure.
1382 * @process_aen: type of AENs to process
1383 *
1384 * Processes specific types of Asynchronous Events generated by firmware.
1385 * The type of AENs to process is specified by process_aen and can be
1386 * PROCESS_ALL_AENS 0
1387 * FLUSH_DDB_CHANGED_AENS 1
1388 * RELOGIN_DDB_CHANGED_AENS 2
1389 **/
1390 void qla4xxx_process_aen(struct scsi_qla_host * ha, uint8_t process_aen)
1391 {
1392 uint32_t mbox_sts[MBOX_AEN_REG_COUNT];
1393 struct aen *aen;
1394 int i;
1395 unsigned long flags;
1396
1397 spin_lock_irqsave(&ha->hardware_lock, flags);
1398 while (ha->aen_out != ha->aen_in) {
1399 aen = &ha->aen_q[ha->aen_out];
1400 /* copy aen information to local structure */
1401 for (i = 0; i < MBOX_AEN_REG_COUNT; i++)
1402 mbox_sts[i] = aen->mbox_sts[i];
1403
1404 ha->aen_q_count++;
1405 ha->aen_out++;
1406
1407 if (ha->aen_out == MAX_AEN_ENTRIES)
1408 ha->aen_out = 0;
1409
1410 spin_unlock_irqrestore(&ha->hardware_lock, flags);
1411
1412 DEBUG2(printk("qla4xxx(%ld): AEN[%d]=0x%08x, mbx1=0x%08x mbx2=0x%08x"
1413 " mbx3=0x%08x mbx4=0x%08x\n", ha->host_no,
1414 (ha->aen_out ? (ha->aen_out-1): (MAX_AEN_ENTRIES-1)),
1415 mbox_sts[0], mbox_sts[1], mbox_sts[2],
1416 mbox_sts[3], mbox_sts[4]));
1417
1418 switch (mbox_sts[0]) {
1419 case MBOX_ASTS_DATABASE_CHANGED:
1420 switch (process_aen) {
1421 case FLUSH_DDB_CHANGED_AENS:
1422 DEBUG2(printk("scsi%ld: AEN[%d] %04x, index "
1423 "[%d] state=%04x FLUSHED!\n",
1424 ha->host_no, ha->aen_out,
1425 mbox_sts[0], mbox_sts[2],
1426 mbox_sts[3]));
1427 break;
1428 case PROCESS_ALL_AENS:
1429 default:
1430 /* Specific device. */
1431 if (mbox_sts[1] == 1)
1432 qla4xxx_process_ddb_changed(ha,
1433 mbox_sts[2], mbox_sts[3],
1434 mbox_sts[4]);
1435 break;
1436 }
1437 }
1438 spin_lock_irqsave(&ha->hardware_lock, flags);
1439 }
1440 spin_unlock_irqrestore(&ha->hardware_lock, flags);
1441 }
1442
1443 int qla4xxx_request_irqs(struct scsi_qla_host *ha)
1444 {
1445 int ret;
1446
1447 if (is_qla40XX(ha))
1448 goto try_intx;
1449
1450 if (ql4xenablemsix == 2) {
1451 /* Note: MSI Interrupts not supported for ISP8324 and ISP8042 */
1452 if (is_qla8032(ha) || is_qla8042(ha)) {
1453 ql4_printk(KERN_INFO, ha, "%s: MSI Interrupts not supported for ISP%04x, Falling back-to INTx mode\n",
1454 __func__, ha->pdev->device);
1455 goto try_intx;
1456 }
1457 goto try_msi;
1458 }
1459
1460 if (ql4xenablemsix == 0 || ql4xenablemsix != 1)
1461 goto try_intx;
1462
1463 /* Trying MSI-X */
1464 ret = qla4_8xxx_enable_msix(ha);
1465 if (!ret) {
1466 DEBUG2(ql4_printk(KERN_INFO, ha,
1467 "MSI-X: Enabled (0x%X).\n", ha->revision_id));
1468 goto irq_attached;
1469 } else {
1470 if (is_qla8032(ha) || is_qla8042(ha)) {
1471 ql4_printk(KERN_INFO, ha, "%s: ISP%04x: MSI-X: Falling back-to INTx mode. ret = %d\n",
1472 __func__, ha->pdev->device, ret);
1473 goto try_intx;
1474 }
1475 }
1476
1477 ql4_printk(KERN_WARNING, ha,
1478 "MSI-X: Falling back-to MSI mode -- %d.\n", ret);
1479
1480 try_msi:
1481 /* Trying MSI */
1482 ret = pci_enable_msi(ha->pdev);
1483 if (!ret) {
1484 ret = request_irq(ha->pdev->irq, qla4_8xxx_msi_handler,
1485 0, DRIVER_NAME, ha);
1486 if (!ret) {
1487 DEBUG2(ql4_printk(KERN_INFO, ha, "MSI: Enabled.\n"));
1488 set_bit(AF_MSI_ENABLED, &ha->flags);
1489 goto irq_attached;
1490 } else {
1491 ql4_printk(KERN_WARNING, ha,
1492 "MSI: Failed to reserve interrupt %d "
1493 "already in use.\n", ha->pdev->irq);
1494 pci_disable_msi(ha->pdev);
1495 }
1496 }
1497
1498 /*
1499 * Prevent interrupts from falling back to INTx mode in cases where
1500 * interrupts cannot get acquired through MSI-X or MSI mode.
1501 */
1502 if (is_qla8022(ha)) {
1503 ql4_printk(KERN_WARNING, ha, "IRQ not attached -- %d.\n", ret);
1504 goto irq_not_attached;
1505 }
1506 try_intx:
1507 /* Trying INTx */
1508 ret = request_irq(ha->pdev->irq, ha->isp_ops->intr_handler,
1509 IRQF_SHARED, DRIVER_NAME, ha);
1510 if (!ret) {
1511 DEBUG2(ql4_printk(KERN_INFO, ha, "INTx: Enabled.\n"));
1512 set_bit(AF_INTx_ENABLED, &ha->flags);
1513 goto irq_attached;
1514
1515 } else {
1516 ql4_printk(KERN_WARNING, ha,
1517 "INTx: Failed to reserve interrupt %d already in"
1518 " use.\n", ha->pdev->irq);
1519 goto irq_not_attached;
1520 }
1521
1522 irq_attached:
1523 set_bit(AF_IRQ_ATTACHED, &ha->flags);
1524 ha->host->irq = ha->pdev->irq;
1525 ql4_printk(KERN_INFO, ha, "%s: irq %d attached\n",
1526 __func__, ha->pdev->irq);
1527 irq_not_attached:
1528 return ret;
1529 }
1530
1531 void qla4xxx_free_irqs(struct scsi_qla_host *ha)
1532 {
1533 if (test_and_clear_bit(AF_IRQ_ATTACHED, &ha->flags)) {
1534 if (test_bit(AF_MSIX_ENABLED, &ha->flags)) {
1535 qla4_8xxx_disable_msix(ha);
1536 } else if (test_and_clear_bit(AF_MSI_ENABLED, &ha->flags)) {
1537 free_irq(ha->pdev->irq, ha);
1538 pci_disable_msi(ha->pdev);
1539 } else if (test_and_clear_bit(AF_INTx_ENABLED, &ha->flags)) {
1540 free_irq(ha->pdev->irq, ha);
1541 }
1542 }
1543 }
Linux with added FPC-III support