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Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
[linux-2.6/libata-dev.git] / drivers / scsi / qla4xxx / ql4_isr.c
blob1b83dc283d2e7a568ec0fe46ef08fc579742492a
1 /*
2 * QLogic iSCSI HBA Driver
3 * Copyright (c) 2003-2012 QLogic Corporation
4 *
5 * See LICENSE.qla4xxx for copyright and licensing details.
6 */
7
8 #include "ql4_def.h"
9 #include "ql4_glbl.h"
10 #include "ql4_dbg.h"
11 #include "ql4_inline.h"
12
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->req_q_count += task_data->iocb_req_cnt;
400 ha->iocb_cnt -= task_data->iocb_req_cnt;
401 queue_work(ha->task_wq, &task_data->task_work);
402 }
403
404 static struct mrb *qla4xxx_del_mrb_from_active_array(struct scsi_qla_host *ha,
405 uint32_t index)
406 {
407 struct mrb *mrb = NULL;
408
409 /* validate handle and remove from active array */
410 if (index >= MAX_MRB)
411 return mrb;
412
413 mrb = ha->active_mrb_array[index];
414 ha->active_mrb_array[index] = NULL;
415 if (!mrb)
416 return mrb;
417
418 /* update counters */
419 ha->req_q_count += mrb->iocb_cnt;
420 ha->iocb_cnt -= mrb->iocb_cnt;
421
422 return mrb;
423 }
424
425 static void qla4xxx_mbox_status_entry(struct scsi_qla_host *ha,
426 struct mbox_status_iocb *mbox_sts_entry)
427 {
428 struct mrb *mrb;
429 uint32_t status;
430 uint32_t data_size;
431
432 mrb = qla4xxx_del_mrb_from_active_array(ha,
433 le32_to_cpu(mbox_sts_entry->handle));
434
435 if (mrb == NULL) {
436 ql4_printk(KERN_WARNING, ha, "%s: mrb[%d] is null\n", __func__,
437 mbox_sts_entry->handle);
438 return;
439 }
440
441 switch (mrb->mbox_cmd) {
442 case MBOX_CMD_PING:
443 DEBUG2(ql4_printk(KERN_INFO, ha, "%s: mbox_cmd = 0x%x, "
444 "mbox_sts[0] = 0x%x, mbox_sts[6] = 0x%x\n",
445 __func__, mrb->mbox_cmd,
446 mbox_sts_entry->out_mbox[0],
447 mbox_sts_entry->out_mbox[6]));
448
449 if (mbox_sts_entry->out_mbox[0] == MBOX_STS_COMMAND_COMPLETE)
450 status = ISCSI_PING_SUCCESS;
451 else
452 status = mbox_sts_entry->out_mbox[6];
453
454 data_size = sizeof(mbox_sts_entry->out_mbox);
455
456 qla4xxx_post_ping_evt_work(ha, status, mrb->pid, data_size,
457 (uint8_t *) mbox_sts_entry->out_mbox);
458 break;
459
460 default:
461 DEBUG2(ql4_printk(KERN_WARNING, ha, "%s: invalid mbox_cmd = "
462 "0x%x\n", __func__, mrb->mbox_cmd));
463 }
464
465 kfree(mrb);
466 return;
467 }
468
469 /**
470 * qla4xxx_process_response_queue - process response queue completions
471 * @ha: Pointer to host adapter structure.
472 *
473 * This routine process response queue completions in interrupt context.
474 * Hardware_lock locked upon entry
475 **/
476 void qla4xxx_process_response_queue(struct scsi_qla_host *ha)
477 {
478 uint32_t count = 0;
479 struct srb *srb = NULL;
480 struct status_entry *sts_entry;
481
482 /* Process all responses from response queue */
483 while ((ha->response_ptr->signature != RESPONSE_PROCESSED)) {
484 sts_entry = (struct status_entry *) ha->response_ptr;
485 count++;
486
487 /* Advance pointers for next entry */
488 if (ha->response_out == (RESPONSE_QUEUE_DEPTH - 1)) {
489 ha->response_out = 0;
490 ha->response_ptr = ha->response_ring;
491 } else {
492 ha->response_out++;
493 ha->response_ptr++;
494 }
495
496 /* process entry */
497 switch (sts_entry->hdr.entryType) {
498 case ET_STATUS:
499 /* Common status */
500 qla4xxx_status_entry(ha, sts_entry);
501 break;
502
503 case ET_PASSTHRU_STATUS:
504 if (sts_entry->hdr.systemDefined == SD_ISCSI_PDU)
505 qla4xxx_passthru_status_entry(ha,
506 (struct passthru_status *)sts_entry);
507 else
508 ql4_printk(KERN_ERR, ha,
509 "%s: Invalid status received\n",
510 __func__);
511
512 break;
513
514 case ET_STATUS_CONTINUATION:
515 qla4xxx_status_cont_entry(ha,
516 (struct status_cont_entry *) sts_entry);
517 break;
518
519 case ET_COMMAND:
520 /* ISP device queue is full. Command not
521 * accepted by ISP. Queue command for
522 * later */
523
524 srb = qla4xxx_del_from_active_array(ha,
525 le32_to_cpu(sts_entry->
526 handle));
527 if (srb == NULL)
528 goto exit_prq_invalid_handle;
529
530 DEBUG2(printk("scsi%ld: %s: FW device queue full, "
531 "srb %p\n", ha->host_no, __func__, srb));
532
533 /* ETRY normally by sending it back with
534 * DID_BUS_BUSY */
535 srb->cmd->result = DID_BUS_BUSY << 16;
536 kref_put(&srb->srb_ref, qla4xxx_srb_compl);
537 break;
538
539 case ET_CONTINUE:
540 /* Just throw away the continuation entries */
541 DEBUG2(printk("scsi%ld: %s: Continuation entry - "
542 "ignoring\n", ha->host_no, __func__));
543 break;
544
545 case ET_MBOX_STATUS:
546 DEBUG2(ql4_printk(KERN_INFO, ha,
547 "%s: mbox status IOCB\n", __func__));
548 qla4xxx_mbox_status_entry(ha,
549 (struct mbox_status_iocb *)sts_entry);
550 break;
551
552 default:
553 /*
554 * Invalid entry in response queue, reset RISC
555 * firmware.
556 */
557 DEBUG2(printk("scsi%ld: %s: Invalid entry %x in "
558 "response queue \n", ha->host_no,
559 __func__,
560 sts_entry->hdr.entryType));
561 goto exit_prq_error;
562 }
563 ((struct response *)sts_entry)->signature = RESPONSE_PROCESSED;
564 wmb();
565 }
566
567 /*
568 * Tell ISP we're done with response(s). This also clears the interrupt.
569 */
570 ha->isp_ops->complete_iocb(ha);
571
572 return;
573
574 exit_prq_invalid_handle:
575 DEBUG2(printk("scsi%ld: %s: Invalid handle(srb)=%p type=%x IOCS=%x\n",
576 ha->host_no, __func__, srb, sts_entry->hdr.entryType,
577 sts_entry->completionStatus));
578
579 exit_prq_error:
580 ha->isp_ops->complete_iocb(ha);
581 set_bit(DPC_RESET_HA, &ha->dpc_flags);
582 }
583
584 /**
585 * qla4_83xx_loopback_in_progress: Is loopback in progress?
586 * @ha: Pointer to host adapter structure.
587 * @ret: 1 = loopback in progress, 0 = loopback not in progress
588 **/
589 static int qla4_83xx_loopback_in_progress(struct scsi_qla_host *ha)
590 {
591 int rval = 1;
592
593 if (is_qla8032(ha)) {
594 if ((ha->idc_info.info2 & ENABLE_INTERNAL_LOOPBACK) ||
595 (ha->idc_info.info2 & ENABLE_EXTERNAL_LOOPBACK)) {
596 DEBUG2(ql4_printk(KERN_INFO, ha,
597 "%s: Loopback diagnostics in progress\n",
598 __func__));
599 rval = 1;
600 } else {
601 DEBUG2(ql4_printk(KERN_INFO, ha,
602 "%s: Loopback diagnostics not in progress\n",
603 __func__));
604 rval = 0;
605 }
606 }
607
608 return rval;
609 }
610
611 /**
612 * qla4xxx_isr_decode_mailbox - decodes mailbox status
613 * @ha: Pointer to host adapter structure.
614 * @mailbox_status: Mailbox status.
615 *
616 * This routine decodes the mailbox status during the ISR.
617 * Hardware_lock locked upon entry. runs in interrupt context.
618 **/
619 static void qla4xxx_isr_decode_mailbox(struct scsi_qla_host * ha,
620 uint32_t mbox_status)
621 {
622 int i;
623 uint32_t mbox_sts[MBOX_AEN_REG_COUNT];
624 __le32 __iomem *mailbox_out;
625
626 if (is_qla8032(ha))
627 mailbox_out = &ha->qla4_83xx_reg->mailbox_out[0];
628 else if (is_qla8022(ha))
629 mailbox_out = &ha->qla4_82xx_reg->mailbox_out[0];
630 else
631 mailbox_out = &ha->reg->mailbox[0];
632
633 if ((mbox_status == MBOX_STS_BUSY) ||
634 (mbox_status == MBOX_STS_INTERMEDIATE_COMPLETION) ||
635 (mbox_status >> 12 == MBOX_COMPLETION_STATUS)) {
636 ha->mbox_status[0] = mbox_status;
637
638 if (test_bit(AF_MBOX_COMMAND, &ha->flags)) {
639 /*
640 * Copy all mailbox registers to a temporary
641 * location and set mailbox command done flag
642 */
643 for (i = 0; i < ha->mbox_status_count; i++)
644 ha->mbox_status[i] = readl(&mailbox_out[i]);
645
646 set_bit(AF_MBOX_COMMAND_DONE, &ha->flags);
647
648 if (test_bit(AF_MBOX_COMMAND_NOPOLL, &ha->flags))
649 complete(&ha->mbx_intr_comp);
650 }
651 } else if (mbox_status >> 12 == MBOX_ASYNC_EVENT_STATUS) {
652 for (i = 0; i < MBOX_AEN_REG_COUNT; i++)
653 mbox_sts[i] = readl(&mailbox_out[i]);
654
655 /* Immediately process the AENs that don't require much work.
656 * Only queue the database_changed AENs */
657 if (ha->aen_log.count < MAX_AEN_ENTRIES) {
658 for (i = 0; i < MBOX_AEN_REG_COUNT; i++)
659 ha->aen_log.entry[ha->aen_log.count].mbox_sts[i] =
660 mbox_sts[i];
661 ha->aen_log.count++;
662 }
663 switch (mbox_status) {
664 case MBOX_ASTS_SYSTEM_ERROR:
665 /* Log Mailbox registers */
666 ql4_printk(KERN_INFO, ha, "%s: System Err\n", __func__);
667 qla4xxx_dump_registers(ha);
668
669 if ((is_qla8022(ha) && ql4xdontresethba) ||
670 (is_qla8032(ha) && qla4_83xx_idc_dontreset(ha))) {
671 DEBUG2(printk("scsi%ld: %s:Don't Reset HBA\n",
672 ha->host_no, __func__));
673 } else {
674 set_bit(AF_GET_CRASH_RECORD, &ha->flags);
675 set_bit(DPC_RESET_HA, &ha->dpc_flags);
676 }
677 break;
678
679 case MBOX_ASTS_REQUEST_TRANSFER_ERROR:
680 case MBOX_ASTS_RESPONSE_TRANSFER_ERROR:
681 case MBOX_ASTS_NVRAM_INVALID:
682 case MBOX_ASTS_IP_ADDRESS_CHANGED:
683 case MBOX_ASTS_DHCP_LEASE_EXPIRED:
684 DEBUG2(printk("scsi%ld: AEN %04x, ERROR Status, "
685 "Reset HA\n", ha->host_no, mbox_status));
686 if (is_qla80XX(ha))
687 set_bit(DPC_RESET_HA_FW_CONTEXT,
688 &ha->dpc_flags);
689 else
690 set_bit(DPC_RESET_HA, &ha->dpc_flags);
691 break;
692
693 case MBOX_ASTS_LINK_UP:
694 set_bit(AF_LINK_UP, &ha->flags);
695 if (test_bit(AF_INIT_DONE, &ha->flags))
696 set_bit(DPC_LINK_CHANGED, &ha->dpc_flags);
697
698 ql4_printk(KERN_INFO, ha, "%s: LINK UP\n", __func__);
699 qla4xxx_post_aen_work(ha, ISCSI_EVENT_LINKUP,
700 sizeof(mbox_sts),
701 (uint8_t *) mbox_sts);
702 break;
703
704 case MBOX_ASTS_LINK_DOWN:
705 clear_bit(AF_LINK_UP, &ha->flags);
706 if (test_bit(AF_INIT_DONE, &ha->flags)) {
707 set_bit(DPC_LINK_CHANGED, &ha->dpc_flags);
708 qla4xxx_wake_dpc(ha);
709 }
710
711 ql4_printk(KERN_INFO, ha, "%s: LINK DOWN\n", __func__);
712 qla4xxx_post_aen_work(ha, ISCSI_EVENT_LINKDOWN,
713 sizeof(mbox_sts),
714 (uint8_t *) mbox_sts);
715 break;
716
717 case MBOX_ASTS_HEARTBEAT:
718 ha->seconds_since_last_heartbeat = 0;
719 break;
720
721 case MBOX_ASTS_DHCP_LEASE_ACQUIRED:
722 DEBUG2(printk("scsi%ld: AEN %04x DHCP LEASE "
723 "ACQUIRED\n", ha->host_no, mbox_status));
724 set_bit(DPC_GET_DHCP_IP_ADDR, &ha->dpc_flags);
725 break;
726
727 case MBOX_ASTS_PROTOCOL_STATISTIC_ALARM:
728 case MBOX_ASTS_SCSI_COMMAND_PDU_REJECTED: /* Target
729 * mode
730 * only */
731 case MBOX_ASTS_UNSOLICITED_PDU_RECEIVED: /* Connection mode */
732 case MBOX_ASTS_IPSEC_SYSTEM_FATAL_ERROR:
733 case MBOX_ASTS_SUBNET_STATE_CHANGE:
734 case MBOX_ASTS_DUPLICATE_IP:
735 /* No action */
736 DEBUG2(printk("scsi%ld: AEN %04x\n", ha->host_no,
737 mbox_status));
738 break;
739
740 case MBOX_ASTS_IP_ADDR_STATE_CHANGED:
741 printk("scsi%ld: AEN %04x, mbox_sts[2]=%04x, "
742 "mbox_sts[3]=%04x\n", ha->host_no, mbox_sts[0],
743 mbox_sts[2], mbox_sts[3]);
744
745 /* mbox_sts[2] = Old ACB state
746 * mbox_sts[3] = new ACB state */
747 if ((mbox_sts[3] == ACB_STATE_VALID) &&
748 ((mbox_sts[2] == ACB_STATE_TENTATIVE) ||
749 (mbox_sts[2] == ACB_STATE_ACQUIRING)))
750 set_bit(DPC_GET_DHCP_IP_ADDR, &ha->dpc_flags);
751 else if ((mbox_sts[3] == ACB_STATE_ACQUIRING) &&
752 (mbox_sts[2] == ACB_STATE_VALID)) {
753 if (is_qla80XX(ha))
754 set_bit(DPC_RESET_HA_FW_CONTEXT,
755 &ha->dpc_flags);
756 else
757 set_bit(DPC_RESET_HA, &ha->dpc_flags);
758 } else if ((mbox_sts[3] == ACB_STATE_UNCONFIGURED))
759 complete(&ha->disable_acb_comp);
760 break;
761
762 case MBOX_ASTS_MAC_ADDRESS_CHANGED:
763 case MBOX_ASTS_DNS:
764 /* No action */
765 DEBUG2(printk(KERN_INFO "scsi%ld: AEN %04x, "
766 "mbox_sts[1]=%04x, mbox_sts[2]=%04x\n",
767 ha->host_no, mbox_sts[0],
768 mbox_sts[1], mbox_sts[2]));
769 break;
770
771 case MBOX_ASTS_SELF_TEST_FAILED:
772 case MBOX_ASTS_LOGIN_FAILED:
773 /* No action */
774 DEBUG2(printk("scsi%ld: AEN %04x, mbox_sts[1]=%04x, "
775 "mbox_sts[2]=%04x, mbox_sts[3]=%04x\n",
776 ha->host_no, mbox_sts[0], mbox_sts[1],
777 mbox_sts[2], mbox_sts[3]));
778 break;
779
780 case MBOX_ASTS_DATABASE_CHANGED:
781 /* Queue AEN information and process it in the DPC
782 * routine */
783 if (ha->aen_q_count > 0) {
784
785 /* decrement available counter */
786 ha->aen_q_count--;
787
788 for (i = 0; i < MBOX_AEN_REG_COUNT; i++)
789 ha->aen_q[ha->aen_in].mbox_sts[i] =
790 mbox_sts[i];
791
792 /* print debug message */
793 DEBUG2(printk("scsi%ld: AEN[%d] %04x queued "
794 "mb1:0x%x mb2:0x%x mb3:0x%x "
795 "mb4:0x%x mb5:0x%x\n",
796 ha->host_no, ha->aen_in,
797 mbox_sts[0], mbox_sts[1],
798 mbox_sts[2], mbox_sts[3],
799 mbox_sts[4], mbox_sts[5]));
800
801 /* advance pointer */
802 ha->aen_in++;
803 if (ha->aen_in == MAX_AEN_ENTRIES)
804 ha->aen_in = 0;
805
806 /* The DPC routine will process the aen */
807 set_bit(DPC_AEN, &ha->dpc_flags);
808 } else {
809 DEBUG2(printk("scsi%ld: %s: aen %04x, queue "
810 "overflowed! AEN LOST!!\n",
811 ha->host_no, __func__,
812 mbox_sts[0]));
813
814 DEBUG2(printk("scsi%ld: DUMP AEN QUEUE\n",
815 ha->host_no));
816
817 for (i = 0; i < MAX_AEN_ENTRIES; i++) {
818 DEBUG2(printk("AEN[%d] %04x %04x %04x "
819 "%04x\n", i, mbox_sts[0],
820 mbox_sts[1], mbox_sts[2],
821 mbox_sts[3]));
822 }
823 }
824 break;
825
826 case MBOX_ASTS_TXSCVR_INSERTED:
827 DEBUG2(printk(KERN_WARNING
828 "scsi%ld: AEN %04x Transceiver"
829 " inserted\n", ha->host_no, mbox_sts[0]));
830 break;
831
832 case MBOX_ASTS_TXSCVR_REMOVED:
833 DEBUG2(printk(KERN_WARNING
834 "scsi%ld: AEN %04x Transceiver"
835 " removed\n", ha->host_no, mbox_sts[0]));
836 break;
837
838 case MBOX_ASTS_IDC_REQUEST_NOTIFICATION:
839 {
840 uint32_t opcode;
841 if (is_qla8032(ha)) {
842 DEBUG2(ql4_printk(KERN_INFO, ha,
843 "scsi%ld: AEN %04x, mbox_sts[1]=%08x, mbox_sts[2]=%08x, mbox_sts[3]=%08x, mbox_sts[4]=%08x\n",
844 ha->host_no, mbox_sts[0],
845 mbox_sts[1], mbox_sts[2],
846 mbox_sts[3], mbox_sts[4]));
847 opcode = mbox_sts[1] >> 16;
848 if ((opcode == MBOX_CMD_SET_PORT_CONFIG) ||
849 (opcode == MBOX_CMD_PORT_RESET)) {
850 set_bit(DPC_POST_IDC_ACK,
851 &ha->dpc_flags);
852 ha->idc_info.request_desc = mbox_sts[1];
853 ha->idc_info.info1 = mbox_sts[2];
854 ha->idc_info.info2 = mbox_sts[3];
855 ha->idc_info.info3 = mbox_sts[4];
856 qla4xxx_wake_dpc(ha);
857 }
858 }
859 break;
860 }
861
862 case MBOX_ASTS_IDC_COMPLETE:
863 if (is_qla8032(ha)) {
864 DEBUG2(ql4_printk(KERN_INFO, ha,
865 "scsi%ld: AEN %04x, mbox_sts[1]=%08x, mbox_sts[2]=%08x, mbox_sts[3]=%08x, mbox_sts[4]=%08x\n",
866 ha->host_no, mbox_sts[0],
867 mbox_sts[1], mbox_sts[2],
868 mbox_sts[3], mbox_sts[4]));
869 DEBUG2(ql4_printk(KERN_INFO, ha,
870 "scsi:%ld: AEN %04x IDC Complete notification\n",
871 ha->host_no, mbox_sts[0]));
872
873 if (qla4_83xx_loopback_in_progress(ha))
874 set_bit(AF_LOOPBACK, &ha->flags);
875 else
876 clear_bit(AF_LOOPBACK, &ha->flags);
877 }
878 break;
879
880 default:
881 DEBUG2(printk(KERN_WARNING
882 "scsi%ld: AEN %04x UNKNOWN\n",
883 ha->host_no, mbox_sts[0]));
884 break;
885 }
886 } else {
887 DEBUG2(printk("scsi%ld: Unknown mailbox status %08X\n",
888 ha->host_no, mbox_status));
889
890 ha->mbox_status[0] = mbox_status;
891 }
892 }
893
894 void qla4_83xx_interrupt_service_routine(struct scsi_qla_host *ha,
895 uint32_t intr_status)
896 {
897 /* Process mailbox/asynch event interrupt.*/
898 if (intr_status) {
899 qla4xxx_isr_decode_mailbox(ha,
900 readl(&ha->qla4_83xx_reg->mailbox_out[0]));
901 /* clear the interrupt */
902 writel(0, &ha->qla4_83xx_reg->risc_intr);
903 } else {
904 qla4xxx_process_response_queue(ha);
905 }
906
907 /* clear the interrupt */
908 writel(0, &ha->qla4_83xx_reg->mb_int_mask);
909 }
910
911 /**
912 * qla4_82xx_interrupt_service_routine - isr
913 * @ha: pointer to host adapter structure.
914 *
915 * This is the main interrupt service routine.
916 * hardware_lock locked upon entry. runs in interrupt context.
917 **/
918 void qla4_82xx_interrupt_service_routine(struct scsi_qla_host *ha,
919 uint32_t intr_status)
920 {
921 /* Process response queue interrupt. */
922 if (intr_status & HSRX_RISC_IOCB_INT)
923 qla4xxx_process_response_queue(ha);
924
925 /* Process mailbox/asynch event interrupt.*/
926 if (intr_status & HSRX_RISC_MB_INT)
927 qla4xxx_isr_decode_mailbox(ha,
928 readl(&ha->qla4_82xx_reg->mailbox_out[0]));
929
930 /* clear the interrupt */
931 writel(0, &ha->qla4_82xx_reg->host_int);
932 readl(&ha->qla4_82xx_reg->host_int);
933 }
934
935 /**
936 * qla4xxx_interrupt_service_routine - isr
937 * @ha: pointer to host adapter structure.
938 *
939 * This is the main interrupt service routine.
940 * hardware_lock locked upon entry. runs in interrupt context.
941 **/
942 void qla4xxx_interrupt_service_routine(struct scsi_qla_host * ha,
943 uint32_t intr_status)
944 {
945 /* Process response queue interrupt. */
946 if (intr_status & CSR_SCSI_COMPLETION_INTR)
947 qla4xxx_process_response_queue(ha);
948
949 /* Process mailbox/asynch event interrupt.*/
950 if (intr_status & CSR_SCSI_PROCESSOR_INTR) {
951 qla4xxx_isr_decode_mailbox(ha,
952 readl(&ha->reg->mailbox[0]));
953
954 /* Clear Mailbox Interrupt */
955 writel(set_rmask(CSR_SCSI_PROCESSOR_INTR),
956 &ha->reg->ctrl_status);
957 readl(&ha->reg->ctrl_status);
958 }
959 }
960
961 /**
962 * qla4_82xx_spurious_interrupt - processes spurious interrupt
963 * @ha: pointer to host adapter structure.
964 * @reqs_count: .
965 *
966 **/
967 static void qla4_82xx_spurious_interrupt(struct scsi_qla_host *ha,
968 uint8_t reqs_count)
969 {
970 if (reqs_count)
971 return;
972
973 DEBUG2(ql4_printk(KERN_INFO, ha, "Spurious Interrupt\n"));
974 if (is_qla8022(ha)) {
975 writel(0, &ha->qla4_82xx_reg->host_int);
976 if (test_bit(AF_INTx_ENABLED, &ha->flags))
977 qla4_82xx_wr_32(ha, ha->nx_legacy_intr.tgt_mask_reg,
978 0xfbff);
979 }
980 ha->spurious_int_count++;
981 }
982
983 /**
984 * qla4xxx_intr_handler - hardware interrupt handler.
985 * @irq: Unused
986 * @dev_id: Pointer to host adapter structure
987 **/
988 irqreturn_t qla4xxx_intr_handler(int irq, void *dev_id)
989 {
990 struct scsi_qla_host *ha;
991 uint32_t intr_status;
992 unsigned long flags = 0;
993 uint8_t reqs_count = 0;
994
995 ha = (struct scsi_qla_host *) dev_id;
996 if (!ha) {
997 DEBUG2(printk(KERN_INFO
998 "qla4xxx: Interrupt with NULL host ptr\n"));
999 return IRQ_NONE;
1000 }
1001
1002 spin_lock_irqsave(&ha->hardware_lock, flags);
1003
1004 ha->isr_count++;
1005 /*
1006 * Repeatedly service interrupts up to a maximum of
1007 * MAX_REQS_SERVICED_PER_INTR
1008 */
1009 while (1) {
1010 /*
1011 * Read interrupt status
1012 */
1013 if (ha->isp_ops->rd_shdw_rsp_q_in(ha) !=
1014 ha->response_out)
1015 intr_status = CSR_SCSI_COMPLETION_INTR;
1016 else
1017 intr_status = readl(&ha->reg->ctrl_status);
1018
1019 if ((intr_status &
1020 (CSR_SCSI_RESET_INTR|CSR_FATAL_ERROR|INTR_PENDING)) == 0) {
1021 if (reqs_count == 0)
1022 ha->spurious_int_count++;
1023 break;
1024 }
1025
1026 if (intr_status & CSR_FATAL_ERROR) {
1027 DEBUG2(printk(KERN_INFO "scsi%ld: Fatal Error, "
1028 "Status 0x%04x\n", ha->host_no,
1029 readl(isp_port_error_status (ha))));
1030
1031 /* Issue Soft Reset to clear this error condition.
1032 * This will prevent the RISC from repeatedly
1033 * interrupting the driver; thus, allowing the DPC to
1034 * get scheduled to continue error recovery.
1035 * NOTE: Disabling RISC interrupts does not work in
1036 * this case, as CSR_FATAL_ERROR overrides
1037 * CSR_SCSI_INTR_ENABLE */
1038 if ((readl(&ha->reg->ctrl_status) &
1039 CSR_SCSI_RESET_INTR) == 0) {
1040 writel(set_rmask(CSR_SOFT_RESET),
1041 &ha->reg->ctrl_status);
1042 readl(&ha->reg->ctrl_status);
1043 }
1044
1045 writel(set_rmask(CSR_FATAL_ERROR),
1046 &ha->reg->ctrl_status);
1047 readl(&ha->reg->ctrl_status);
1048
1049 __qla4xxx_disable_intrs(ha);
1050
1051 set_bit(DPC_RESET_HA, &ha->dpc_flags);
1052
1053 break;
1054 } else if (intr_status & CSR_SCSI_RESET_INTR) {
1055 clear_bit(AF_ONLINE, &ha->flags);
1056 __qla4xxx_disable_intrs(ha);
1057
1058 writel(set_rmask(CSR_SCSI_RESET_INTR),
1059 &ha->reg->ctrl_status);
1060 readl(&ha->reg->ctrl_status);
1061
1062 if (!test_bit(AF_HA_REMOVAL, &ha->flags))
1063 set_bit(DPC_RESET_HA_INTR, &ha->dpc_flags);
1064
1065 break;
1066 } else if (intr_status & INTR_PENDING) {
1067 ha->isp_ops->interrupt_service_routine(ha, intr_status);
1068 ha->total_io_count++;
1069 if (++reqs_count == MAX_REQS_SERVICED_PER_INTR)
1070 break;
1071 }
1072 }
1073
1074 spin_unlock_irqrestore(&ha->hardware_lock, flags);
1075
1076 return IRQ_HANDLED;
1077 }
1078
1079 /**
1080 * qla4_82xx_intr_handler - hardware interrupt handler.
1081 * @irq: Unused
1082 * @dev_id: Pointer to host adapter structure
1083 **/
1084 irqreturn_t qla4_82xx_intr_handler(int irq, void *dev_id)
1085 {
1086 struct scsi_qla_host *ha = dev_id;
1087 uint32_t intr_status;
1088 uint32_t status;
1089 unsigned long flags = 0;
1090 uint8_t reqs_count = 0;
1091
1092 if (unlikely(pci_channel_offline(ha->pdev)))
1093 return IRQ_HANDLED;
1094
1095 ha->isr_count++;
1096 status = qla4_82xx_rd_32(ha, ISR_INT_VECTOR);
1097 if (!(status & ha->nx_legacy_intr.int_vec_bit))
1098 return IRQ_NONE;
1099
1100 status = qla4_82xx_rd_32(ha, ISR_INT_STATE_REG);
1101 if (!ISR_IS_LEGACY_INTR_TRIGGERED(status)) {
1102 DEBUG2(ql4_printk(KERN_INFO, ha,
1103 "%s legacy Int not triggered\n", __func__));
1104 return IRQ_NONE;
1105 }
1106
1107 /* clear the interrupt */
1108 qla4_82xx_wr_32(ha, ha->nx_legacy_intr.tgt_status_reg, 0xffffffff);
1109
1110 /* read twice to ensure write is flushed */
1111 qla4_82xx_rd_32(ha, ISR_INT_VECTOR);
1112 qla4_82xx_rd_32(ha, ISR_INT_VECTOR);
1113
1114 spin_lock_irqsave(&ha->hardware_lock, flags);
1115 while (1) {
1116 if (!(readl(&ha->qla4_82xx_reg->host_int) &
1117 ISRX_82XX_RISC_INT)) {
1118 qla4_82xx_spurious_interrupt(ha, reqs_count);
1119 break;
1120 }
1121 intr_status = readl(&ha->qla4_82xx_reg->host_status);
1122 if ((intr_status &
1123 (HSRX_RISC_MB_INT | HSRX_RISC_IOCB_INT)) == 0) {
1124 qla4_82xx_spurious_interrupt(ha, reqs_count);
1125 break;
1126 }
1127
1128 ha->isp_ops->interrupt_service_routine(ha, intr_status);
1129
1130 /* Enable Interrupt */
1131 qla4_82xx_wr_32(ha, ha->nx_legacy_intr.tgt_mask_reg, 0xfbff);
1132
1133 if (++reqs_count == MAX_REQS_SERVICED_PER_INTR)
1134 break;
1135 }
1136
1137 spin_unlock_irqrestore(&ha->hardware_lock, flags);
1138 return IRQ_HANDLED;
1139 }
1140
1141 #define LEG_INT_PTR_B31 (1 << 31)
1142 #define LEG_INT_PTR_B30 (1 << 30)
1143 #define PF_BITS_MASK (0xF << 16)
1144
1145 /**
1146 * qla4_83xx_intr_handler - hardware interrupt handler.
1147 * @irq: Unused
1148 * @dev_id: Pointer to host adapter structure
1149 **/
1150 irqreturn_t qla4_83xx_intr_handler(int irq, void *dev_id)
1151 {
1152 struct scsi_qla_host *ha = dev_id;
1153 uint32_t leg_int_ptr = 0;
1154 unsigned long flags = 0;
1155
1156 ha->isr_count++;
1157 leg_int_ptr = readl(&ha->qla4_83xx_reg->leg_int_ptr);
1158
1159 /* Legacy interrupt is valid if bit31 of leg_int_ptr is set */
1160 if (!(leg_int_ptr & LEG_INT_PTR_B31)) {
1161 DEBUG2(ql4_printk(KERN_ERR, ha,
1162 "%s: Legacy Interrupt Bit 31 not set, spurious interrupt!\n",
1163 __func__));
1164 return IRQ_NONE;
1165 }
1166
1167 /* Validate the PCIE function ID set in leg_int_ptr bits [19..16] */
1168 if ((leg_int_ptr & PF_BITS_MASK) != ha->pf_bit) {
1169 DEBUG2(ql4_printk(KERN_ERR, ha,
1170 "%s: Incorrect function ID 0x%x in legacy interrupt register, ha->pf_bit = 0x%x\n",
1171 __func__, (leg_int_ptr & PF_BITS_MASK),
1172 ha->pf_bit));
1173 return IRQ_NONE;
1174 }
1175
1176 /* To de-assert legacy interrupt, write 0 to Legacy Interrupt Trigger
1177 * Control register and poll till Legacy Interrupt Pointer register
1178 * bit30 is 0.
1179 */
1180 writel(0, &ha->qla4_83xx_reg->leg_int_trig);
1181 do {
1182 leg_int_ptr = readl(&ha->qla4_83xx_reg->leg_int_ptr);
1183 if ((leg_int_ptr & PF_BITS_MASK) != ha->pf_bit)
1184 break;
1185 } while (leg_int_ptr & LEG_INT_PTR_B30);
1186
1187 spin_lock_irqsave(&ha->hardware_lock, flags);
1188 leg_int_ptr = readl(&ha->qla4_83xx_reg->risc_intr);
1189 ha->isp_ops->interrupt_service_routine(ha, leg_int_ptr);
1190 spin_unlock_irqrestore(&ha->hardware_lock, flags);
1191
1192 return IRQ_HANDLED;
1193 }
1194
1195 irqreturn_t
1196 qla4_8xxx_msi_handler(int irq, void *dev_id)
1197 {
1198 struct scsi_qla_host *ha;
1199
1200 ha = (struct scsi_qla_host *) dev_id;
1201 if (!ha) {
1202 DEBUG2(printk(KERN_INFO
1203 "qla4xxx: MSIX: Interrupt with NULL host ptr\n"));
1204 return IRQ_NONE;
1205 }
1206
1207 ha->isr_count++;
1208 /* clear the interrupt */
1209 qla4_82xx_wr_32(ha, ha->nx_legacy_intr.tgt_status_reg, 0xffffffff);
1210
1211 /* read twice to ensure write is flushed */
1212 qla4_82xx_rd_32(ha, ISR_INT_VECTOR);
1213 qla4_82xx_rd_32(ha, ISR_INT_VECTOR);
1214
1215 return qla4_8xxx_default_intr_handler(irq, dev_id);
1216 }
1217
1218 static irqreturn_t qla4_83xx_mailbox_intr_handler(int irq, void *dev_id)
1219 {
1220 struct scsi_qla_host *ha = dev_id;
1221 unsigned long flags;
1222 uint32_t ival = 0;
1223
1224 spin_lock_irqsave(&ha->hardware_lock, flags);
1225
1226 ival = readl(&ha->qla4_83xx_reg->risc_intr);
1227 if (ival == 0) {
1228 ql4_printk(KERN_INFO, ha,
1229 "%s: It is a spurious mailbox interrupt!\n",
1230 __func__);
1231 ival = readl(&ha->qla4_83xx_reg->mb_int_mask);
1232 ival &= ~INT_MASK_FW_MB;
1233 writel(ival, &ha->qla4_83xx_reg->mb_int_mask);
1234 goto exit;
1235 }
1236
1237 qla4xxx_isr_decode_mailbox(ha,
1238 readl(&ha->qla4_83xx_reg->mailbox_out[0]));
1239 writel(0, &ha->qla4_83xx_reg->risc_intr);
1240 ival = readl(&ha->qla4_83xx_reg->mb_int_mask);
1241 ival &= ~INT_MASK_FW_MB;
1242 writel(ival, &ha->qla4_83xx_reg->mb_int_mask);
1243 ha->isr_count++;
1244 exit:
1245 spin_unlock_irqrestore(&ha->hardware_lock, flags);
1246 return IRQ_HANDLED;
1247 }
1248
1249 /**
1250 * qla4_8xxx_default_intr_handler - hardware interrupt handler.
1251 * @irq: Unused
1252 * @dev_id: Pointer to host adapter structure
1253 *
1254 * This interrupt handler is called directly for MSI-X, and
1255 * called indirectly for MSI.
1256 **/
1257 irqreturn_t
1258 qla4_8xxx_default_intr_handler(int irq, void *dev_id)
1259 {
1260 struct scsi_qla_host *ha = dev_id;
1261 unsigned long flags;
1262 uint32_t intr_status;
1263 uint8_t reqs_count = 0;
1264
1265 if (is_qla8032(ha)) {
1266 qla4_83xx_mailbox_intr_handler(irq, dev_id);
1267 } else {
1268 spin_lock_irqsave(&ha->hardware_lock, flags);
1269 while (1) {
1270 if (!(readl(&ha->qla4_82xx_reg->host_int) &
1271 ISRX_82XX_RISC_INT)) {
1272 qla4_82xx_spurious_interrupt(ha, reqs_count);
1273 break;
1274 }
1275
1276 intr_status = readl(&ha->qla4_82xx_reg->host_status);
1277 if ((intr_status &
1278 (HSRX_RISC_MB_INT | HSRX_RISC_IOCB_INT)) == 0) {
1279 qla4_82xx_spurious_interrupt(ha, reqs_count);
1280 break;
1281 }
1282
1283 ha->isp_ops->interrupt_service_routine(ha, intr_status);
1284
1285 if (++reqs_count == MAX_REQS_SERVICED_PER_INTR)
1286 break;
1287 }
1288 ha->isr_count++;
1289 spin_unlock_irqrestore(&ha->hardware_lock, flags);
1290 }
1291 return IRQ_HANDLED;
1292 }
1293
1294 irqreturn_t
1295 qla4_8xxx_msix_rsp_q(int irq, void *dev_id)
1296 {
1297 struct scsi_qla_host *ha = dev_id;
1298 unsigned long flags;
1299 uint32_t ival = 0;
1300
1301 spin_lock_irqsave(&ha->hardware_lock, flags);
1302 if (is_qla8032(ha)) {
1303 ival = readl(&ha->qla4_83xx_reg->iocb_int_mask);
1304 if (ival == 0) {
1305 ql4_printk(KERN_INFO, ha, "%s: It is a spurious iocb interrupt!\n",
1306 __func__);
1307 goto exit_msix_rsp_q;
1308 }
1309 qla4xxx_process_response_queue(ha);
1310 writel(0, &ha->qla4_83xx_reg->iocb_int_mask);
1311 } else {
1312 qla4xxx_process_response_queue(ha);
1313 writel(0, &ha->qla4_82xx_reg->host_int);
1314 }
1315 ha->isr_count++;
1316 exit_msix_rsp_q:
1317 spin_unlock_irqrestore(&ha->hardware_lock, flags);
1318 return IRQ_HANDLED;
1319 }
1320
1321 /**
1322 * qla4xxx_process_aen - processes AENs generated by firmware
1323 * @ha: pointer to host adapter structure.
1324 * @process_aen: type of AENs to process
1325 *
1326 * Processes specific types of Asynchronous Events generated by firmware.
1327 * The type of AENs to process is specified by process_aen and can be
1328 * PROCESS_ALL_AENS 0
1329 * FLUSH_DDB_CHANGED_AENS 1
1330 * RELOGIN_DDB_CHANGED_AENS 2
1331 **/
1332 void qla4xxx_process_aen(struct scsi_qla_host * ha, uint8_t process_aen)
1333 {
1334 uint32_t mbox_sts[MBOX_AEN_REG_COUNT];
1335 struct aen *aen;
1336 int i;
1337 unsigned long flags;
1338
1339 spin_lock_irqsave(&ha->hardware_lock, flags);
1340 while (ha->aen_out != ha->aen_in) {
1341 aen = &ha->aen_q[ha->aen_out];
1342 /* copy aen information to local structure */
1343 for (i = 0; i < MBOX_AEN_REG_COUNT; i++)
1344 mbox_sts[i] = aen->mbox_sts[i];
1345
1346 ha->aen_q_count++;
1347 ha->aen_out++;
1348
1349 if (ha->aen_out == MAX_AEN_ENTRIES)
1350 ha->aen_out = 0;
1351
1352 spin_unlock_irqrestore(&ha->hardware_lock, flags);
1353
1354 DEBUG2(printk("qla4xxx(%ld): AEN[%d]=0x%08x, mbx1=0x%08x mbx2=0x%08x"
1355 " mbx3=0x%08x mbx4=0x%08x\n", ha->host_no,
1356 (ha->aen_out ? (ha->aen_out-1): (MAX_AEN_ENTRIES-1)),
1357 mbox_sts[0], mbox_sts[1], mbox_sts[2],
1358 mbox_sts[3], mbox_sts[4]));
1359
1360 switch (mbox_sts[0]) {
1361 case MBOX_ASTS_DATABASE_CHANGED:
1362 switch (process_aen) {
1363 case FLUSH_DDB_CHANGED_AENS:
1364 DEBUG2(printk("scsi%ld: AEN[%d] %04x, index "
1365 "[%d] state=%04x FLUSHED!\n",
1366 ha->host_no, ha->aen_out,
1367 mbox_sts[0], mbox_sts[2],
1368 mbox_sts[3]));
1369 break;
1370 case PROCESS_ALL_AENS:
1371 default:
1372 /* Specific device. */
1373 if (mbox_sts[1] == 1)
1374 qla4xxx_process_ddb_changed(ha,
1375 mbox_sts[2], mbox_sts[3],
1376 mbox_sts[4]);
1377 break;
1378 }
1379 }
1380 spin_lock_irqsave(&ha->hardware_lock, flags);
1381 }
1382 spin_unlock_irqrestore(&ha->hardware_lock, flags);
1383 }
1384
1385 int qla4xxx_request_irqs(struct scsi_qla_host *ha)
1386 {
1387 int ret;
1388
1389 if (is_qla40XX(ha))
1390 goto try_intx;
1391
1392 if (ql4xenablemsix == 2) {
1393 /* Note: MSI Interrupts not supported for ISP8324 */
1394 if (is_qla8032(ha)) {
1395 ql4_printk(KERN_INFO, ha, "%s: MSI Interrupts not supported for ISP8324, Falling back-to INTx mode\n",
1396 __func__);
1397 goto try_intx;
1398 }
1399 goto try_msi;
1400 }
1401
1402 if (ql4xenablemsix == 0 || ql4xenablemsix != 1)
1403 goto try_intx;
1404
1405 /* Trying MSI-X */
1406 ret = qla4_8xxx_enable_msix(ha);
1407 if (!ret) {
1408 DEBUG2(ql4_printk(KERN_INFO, ha,
1409 "MSI-X: Enabled (0x%X).\n", ha->revision_id));
1410 goto irq_attached;
1411 } else {
1412 if (is_qla8032(ha)) {
1413 ql4_printk(KERN_INFO, ha, "%s: ISP8324: MSI-X: Falling back-to INTx mode. ret = %d\n",
1414 __func__, ret);
1415 goto try_intx;
1416 }
1417 }
1418
1419 ql4_printk(KERN_WARNING, ha,
1420 "MSI-X: Falling back-to MSI mode -- %d.\n", ret);
1421
1422 try_msi:
1423 /* Trying MSI */
1424 ret = pci_enable_msi(ha->pdev);
1425 if (!ret) {
1426 ret = request_irq(ha->pdev->irq, qla4_8xxx_msi_handler,
1427 0, DRIVER_NAME, ha);
1428 if (!ret) {
1429 DEBUG2(ql4_printk(KERN_INFO, ha, "MSI: Enabled.\n"));
1430 set_bit(AF_MSI_ENABLED, &ha->flags);
1431 goto irq_attached;
1432 } else {
1433 ql4_printk(KERN_WARNING, ha,
1434 "MSI: Failed to reserve interrupt %d "
1435 "already in use.\n", ha->pdev->irq);
1436 pci_disable_msi(ha->pdev);
1437 }
1438 }
1439
1440 /*
1441 * Prevent interrupts from falling back to INTx mode in cases where
1442 * interrupts cannot get acquired through MSI-X or MSI mode.
1443 */
1444 if (is_qla8022(ha)) {
1445 ql4_printk(KERN_WARNING, ha, "IRQ not attached -- %d.\n", ret);
1446 goto irq_not_attached;
1447 }
1448 try_intx:
1449 /* Trying INTx */
1450 ret = request_irq(ha->pdev->irq, ha->isp_ops->intr_handler,
1451 IRQF_SHARED, DRIVER_NAME, ha);
1452 if (!ret) {
1453 DEBUG2(ql4_printk(KERN_INFO, ha, "INTx: Enabled.\n"));
1454 set_bit(AF_INTx_ENABLED, &ha->flags);
1455 goto irq_attached;
1456
1457 } else {
1458 ql4_printk(KERN_WARNING, ha,
1459 "INTx: Failed to reserve interrupt %d already in"
1460 " use.\n", ha->pdev->irq);
1461 goto irq_not_attached;
1462 }
1463
1464 irq_attached:
1465 set_bit(AF_IRQ_ATTACHED, &ha->flags);
1466 ha->host->irq = ha->pdev->irq;
1467 ql4_printk(KERN_INFO, ha, "%s: irq %d attached\n",
1468 __func__, ha->pdev->irq);
1469 irq_not_attached:
1470 return ret;
1471 }
1472
1473 void qla4xxx_free_irqs(struct scsi_qla_host *ha)
1474 {
1475 if (test_and_clear_bit(AF_IRQ_ATTACHED, &ha->flags)) {
1476 if (test_bit(AF_MSIX_ENABLED, &ha->flags)) {
1477 qla4_8xxx_disable_msix(ha);
1478 } else if (test_and_clear_bit(AF_MSI_ENABLED, &ha->flags)) {
1479 free_irq(ha->pdev->irq, ha);
1480 pci_disable_msi(ha->pdev);
1481 } else if (test_and_clear_bit(AF_INTx_ENABLED, &ha->flags)) {
1482 free_irq(ha->pdev->irq, ha);
1483 }
1484 }
1485 }
Linux 2.6 libata-dev (mirror)