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ASoC: imx: remove superfluous code in imx-ssi.c
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / scsi / qla4xxx / ql4_isr.c
blob6ffbe9727dffb5c670b93731d2d121446b7d72b6
1 /*
2 * QLogic iSCSI HBA Driver
3 * Copyright (c) 2003-2010 QLogic Corporation
4 *
5 * See LICENSE.qla4xxx for copyright and licensing details.
6 */
7
8 #include "ql4_def.h"
9 #include "ql4_glbl.h"
10 #include "ql4_dbg.h"
11 #include "ql4_inline.h"
12
13 /**
14 * qla4xxx_copy_sense - copy sense data into cmd sense buffer
15 * @ha: Pointer to host adapter structure.
16 * @sts_entry: Pointer to status entry structure.
17 * @srb: Pointer to srb structure.
18 **/
19 static void qla4xxx_copy_sense(struct scsi_qla_host *ha,
20 struct status_entry *sts_entry,
21 struct srb *srb)
22 {
23 struct scsi_cmnd *cmd = srb->cmd;
24 uint16_t sense_len;
25
26 memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
27 sense_len = le16_to_cpu(sts_entry->senseDataByteCnt);
28 if (sense_len == 0)
29 return;
30
31 /* Save total available sense length,
32 * not to exceed cmd's sense buffer size */
33 sense_len = min_t(uint16_t, sense_len, SCSI_SENSE_BUFFERSIZE);
34 srb->req_sense_ptr = cmd->sense_buffer;
35 srb->req_sense_len = sense_len;
36
37 /* Copy sense from sts_entry pkt */
38 sense_len = min_t(uint16_t, sense_len, IOCB_MAX_SENSEDATA_LEN);
39 memcpy(cmd->sense_buffer, sts_entry->senseData, sense_len);
40
41 DEBUG2(printk(KERN_INFO "scsi%ld:%d:%d:%d: %s: sense key = %x, "
42 "ASL= %02x, ASC/ASCQ = %02x/%02x\n", ha->host_no,
43 cmd->device->channel, cmd->device->id,
44 cmd->device->lun, __func__,
45 sts_entry->senseData[2] & 0x0f,
46 sts_entry->senseData[7],
47 sts_entry->senseData[12],
48 sts_entry->senseData[13]));
49
50 DEBUG5(qla4xxx_dump_buffer(cmd->sense_buffer, sense_len));
51 srb->flags |= SRB_GOT_SENSE;
52
53 /* Update srb, in case a sts_cont pkt follows */
54 srb->req_sense_ptr += sense_len;
55 srb->req_sense_len -= sense_len;
56 if (srb->req_sense_len != 0)
57 ha->status_srb = srb;
58 else
59 ha->status_srb = NULL;
60 }
61
62 /**
63 * qla4xxx_status_cont_entry - Process a Status Continuations entry.
64 * @ha: SCSI driver HA context
65 * @sts_cont: Entry pointer
66 *
67 * Extended sense data.
68 */
69 static void
70 qla4xxx_status_cont_entry(struct scsi_qla_host *ha,
71 struct status_cont_entry *sts_cont)
72 {
73 struct srb *srb = ha->status_srb;
74 struct scsi_cmnd *cmd;
75 uint16_t sense_len;
76
77 if (srb == NULL)
78 return;
79
80 cmd = srb->cmd;
81 if (cmd == NULL) {
82 DEBUG2(printk(KERN_INFO "scsi%ld: %s: Cmd already returned "
83 "back to OS srb=%p srb->state:%d\n", ha->host_no,
84 __func__, srb, srb->state));
85 ha->status_srb = NULL;
86 return;
87 }
88
89 /* Copy sense data. */
90 sense_len = min_t(uint16_t, srb->req_sense_len,
91 IOCB_MAX_EXT_SENSEDATA_LEN);
92 memcpy(srb->req_sense_ptr, sts_cont->ext_sense_data, sense_len);
93 DEBUG5(qla4xxx_dump_buffer(srb->req_sense_ptr, sense_len));
94
95 srb->req_sense_ptr += sense_len;
96 srb->req_sense_len -= sense_len;
97
98 /* Place command on done queue. */
99 if (srb->req_sense_len == 0) {
100 kref_put(&srb->srb_ref, qla4xxx_srb_compl);
101 ha->status_srb = NULL;
102 }
103 }
104
105 /**
106 * qla4xxx_status_entry - processes status IOCBs
107 * @ha: Pointer to host adapter structure.
108 * @sts_entry: Pointer to status entry structure.
109 **/
110 static void qla4xxx_status_entry(struct scsi_qla_host *ha,
111 struct status_entry *sts_entry)
112 {
113 uint8_t scsi_status;
114 struct scsi_cmnd *cmd;
115 struct srb *srb;
116 struct ddb_entry *ddb_entry;
117 uint32_t residual;
118
119 srb = qla4xxx_del_from_active_array(ha, le32_to_cpu(sts_entry->handle));
120 if (!srb) {
121 DEBUG2(printk(KERN_WARNING "scsi%ld: %s: Status Entry invalid "
122 "handle 0x%x, sp=%p. This cmd may have already "
123 "been completed.\n", ha->host_no, __func__,
124 le32_to_cpu(sts_entry->handle), srb));
125 ql4_printk(KERN_WARNING, ha, "%s invalid status entry:"
126 " handle=0x%0x\n", __func__, sts_entry->handle);
127 set_bit(DPC_RESET_HA, &ha->dpc_flags);
128 return;
129 }
130
131 cmd = srb->cmd;
132 if (cmd == NULL) {
133 DEBUG2(printk("scsi%ld: %s: Command already returned back to "
134 "OS pkt->handle=%d srb=%p srb->state:%d\n",
135 ha->host_no, __func__, sts_entry->handle,
136 srb, srb->state));
137 ql4_printk(KERN_WARNING, ha, "Command is NULL:"
138 " already returned to OS (srb=%p)\n", srb);
139 return;
140 }
141
142 ddb_entry = srb->ddb;
143 if (ddb_entry == NULL) {
144 cmd->result = DID_NO_CONNECT << 16;
145 goto status_entry_exit;
146 }
147
148 residual = le32_to_cpu(sts_entry->residualByteCnt);
149
150 /* Translate ISP error to a Linux SCSI error. */
151 scsi_status = sts_entry->scsiStatus;
152 switch (sts_entry->completionStatus) {
153 case SCS_COMPLETE:
154
155 if (sts_entry->iscsiFlags & ISCSI_FLAG_RESIDUAL_OVER) {
156 cmd->result = DID_ERROR << 16;
157 break;
158 }
159
160 if (sts_entry->iscsiFlags &ISCSI_FLAG_RESIDUAL_UNDER) {
161 scsi_set_resid(cmd, residual);
162 if (!scsi_status && ((scsi_bufflen(cmd) - residual) <
163 cmd->underflow)) {
164
165 cmd->result = DID_ERROR << 16;
166
167 DEBUG2(printk("scsi%ld:%d:%d:%d: %s: "
168 "Mid-layer Data underrun0, "
169 "xferlen = 0x%x, "
170 "residual = 0x%x\n", ha->host_no,
171 cmd->device->channel,
172 cmd->device->id,
173 cmd->device->lun, __func__,
174 scsi_bufflen(cmd), residual));
175 break;
176 }
177 }
178
179 cmd->result = DID_OK << 16 | scsi_status;
180
181 if (scsi_status != SCSI_CHECK_CONDITION)
182 break;
183
184 /* Copy Sense Data into sense buffer. */
185 qla4xxx_copy_sense(ha, sts_entry, srb);
186 break;
187
188 case SCS_INCOMPLETE:
189 /* Always set the status to DID_ERROR, since
190 * all conditions result in that status anyway */
191 cmd->result = DID_ERROR << 16;
192 break;
193
194 case SCS_RESET_OCCURRED:
195 DEBUG2(printk("scsi%ld:%d:%d:%d: %s: Device RESET occurred\n",
196 ha->host_no, cmd->device->channel,
197 cmd->device->id, cmd->device->lun, __func__));
198
199 cmd->result = DID_RESET << 16;
200 break;
201
202 case SCS_ABORTED:
203 DEBUG2(printk("scsi%ld:%d:%d:%d: %s: Abort occurred\n",
204 ha->host_no, cmd->device->channel,
205 cmd->device->id, cmd->device->lun, __func__));
206
207 cmd->result = DID_RESET << 16;
208 break;
209
210 case SCS_TIMEOUT:
211 DEBUG2(printk(KERN_INFO "scsi%ld:%d:%d:%d: Timeout\n",
212 ha->host_no, cmd->device->channel,
213 cmd->device->id, cmd->device->lun));
214
215 cmd->result = DID_TRANSPORT_DISRUPTED << 16;
216
217 /*
218 * Mark device missing so that we won't continue to send
219 * I/O to this device. We should get a ddb state change
220 * AEN soon.
221 */
222 if (atomic_read(&ddb_entry->state) == DDB_STATE_ONLINE)
223 qla4xxx_mark_device_missing(ha, ddb_entry);
224 break;
225
226 case SCS_DATA_UNDERRUN:
227 case SCS_DATA_OVERRUN:
228 if ((sts_entry->iscsiFlags & ISCSI_FLAG_RESIDUAL_OVER) ||
229 (sts_entry->completionStatus == SCS_DATA_OVERRUN)) {
230 DEBUG2(printk("scsi%ld:%d:%d:%d: %s: " "Data overrun\n",
231 ha->host_no,
232 cmd->device->channel, cmd->device->id,
233 cmd->device->lun, __func__));
234
235 cmd->result = DID_ERROR << 16;
236 break;
237 }
238
239 scsi_set_resid(cmd, residual);
240
241 /*
242 * If there is scsi_status, it takes precedense over
243 * underflow condition.
244 */
245 if (scsi_status != 0) {
246 cmd->result = DID_OK << 16 | scsi_status;
247
248 if (scsi_status != SCSI_CHECK_CONDITION)
249 break;
250
251 /* Copy Sense Data into sense buffer. */
252 qla4xxx_copy_sense(ha, sts_entry, srb);
253 } else {
254 /*
255 * If RISC reports underrun and target does not
256 * report it then we must have a lost frame, so
257 * tell upper layer to retry it by reporting a
258 * bus busy.
259 */
260 if ((sts_entry->iscsiFlags &
261 ISCSI_FLAG_RESIDUAL_UNDER) == 0) {
262 cmd->result = DID_BUS_BUSY << 16;
263 } else if ((scsi_bufflen(cmd) - residual) <
264 cmd->underflow) {
265 /*
266 * Handle mid-layer underflow???
267 *
268 * For kernels less than 2.4, the driver must
269 * return an error if an underflow is detected.
270 * For kernels equal-to and above 2.4, the
271 * mid-layer will appearantly handle the
272 * underflow by detecting the residual count --
273 * unfortunately, we do not see where this is
274 * actually being done. In the interim, we
275 * will return DID_ERROR.
276 */
277 DEBUG2(printk("scsi%ld:%d:%d:%d: %s: "
278 "Mid-layer Data underrun1, "
279 "xferlen = 0x%x, "
280 "residual = 0x%x\n", ha->host_no,
281 cmd->device->channel,
282 cmd->device->id,
283 cmd->device->lun, __func__,
284 scsi_bufflen(cmd), residual));
285
286 cmd->result = DID_ERROR << 16;
287 } else {
288 cmd->result = DID_OK << 16;
289 }
290 }
291 break;
292
293 case SCS_DEVICE_LOGGED_OUT:
294 case SCS_DEVICE_UNAVAILABLE:
295 DEBUG2(printk(KERN_INFO "scsi%ld:%d:%d:%d: SCS_DEVICE "
296 "state: 0x%x\n", ha->host_no,
297 cmd->device->channel, cmd->device->id,
298 cmd->device->lun, sts_entry->completionStatus));
299 /*
300 * Mark device missing so that we won't continue to
301 * send I/O to this device. We should get a ddb
302 * state change AEN soon.
303 */
304 if (atomic_read(&ddb_entry->state) == DDB_STATE_ONLINE)
305 qla4xxx_mark_device_missing(ha, ddb_entry);
306
307 cmd->result = DID_TRANSPORT_DISRUPTED << 16;
308 break;
309
310 case SCS_QUEUE_FULL:
311 /*
312 * SCSI Mid-Layer handles device queue full
313 */
314 cmd->result = DID_OK << 16 | sts_entry->scsiStatus;
315 DEBUG2(printk("scsi%ld:%d:%d: %s: QUEUE FULL detected "
316 "compl=%02x, scsi=%02x, state=%02x, iFlags=%02x,"
317 " iResp=%02x\n", ha->host_no, cmd->device->id,
318 cmd->device->lun, __func__,
319 sts_entry->completionStatus,
320 sts_entry->scsiStatus, sts_entry->state_flags,
321 sts_entry->iscsiFlags,
322 sts_entry->iscsiResponse));
323 break;
324
325 default:
326 cmd->result = DID_ERROR << 16;
327 break;
328 }
329
330 status_entry_exit:
331
332 /* complete the request, if not waiting for status_continuation pkt */
333 srb->cc_stat = sts_entry->completionStatus;
334 if (ha->status_srb == NULL)
335 kref_put(&srb->srb_ref, qla4xxx_srb_compl);
336 }
337
338 /**
339 * qla4xxx_process_response_queue - process response queue completions
340 * @ha: Pointer to host adapter structure.
341 *
342 * This routine process response queue completions in interrupt context.
343 * Hardware_lock locked upon entry
344 **/
345 void qla4xxx_process_response_queue(struct scsi_qla_host *ha)
346 {
347 uint32_t count = 0;
348 struct srb *srb = NULL;
349 struct status_entry *sts_entry;
350
351 /* Process all responses from response queue */
352 while ((ha->response_ptr->signature != RESPONSE_PROCESSED)) {
353 sts_entry = (struct status_entry *) ha->response_ptr;
354 count++;
355
356 /* Advance pointers for next entry */
357 if (ha->response_out == (RESPONSE_QUEUE_DEPTH - 1)) {
358 ha->response_out = 0;
359 ha->response_ptr = ha->response_ring;
360 } else {
361 ha->response_out++;
362 ha->response_ptr++;
363 }
364
365 /* process entry */
366 switch (sts_entry->hdr.entryType) {
367 case ET_STATUS:
368 /* Common status */
369 qla4xxx_status_entry(ha, sts_entry);
370 break;
371
372 case ET_PASSTHRU_STATUS:
373 break;
374
375 case ET_STATUS_CONTINUATION:
376 qla4xxx_status_cont_entry(ha,
377 (struct status_cont_entry *) sts_entry);
378 break;
379
380 case ET_COMMAND:
381 /* ISP device queue is full. Command not
382 * accepted by ISP. Queue command for
383 * later */
384
385 srb = qla4xxx_del_from_active_array(ha,
386 le32_to_cpu(sts_entry->
387 handle));
388 if (srb == NULL)
389 goto exit_prq_invalid_handle;
390
391 DEBUG2(printk("scsi%ld: %s: FW device queue full, "
392 "srb %p\n", ha->host_no, __func__, srb));
393
394 /* ETRY normally by sending it back with
395 * DID_BUS_BUSY */
396 srb->cmd->result = DID_BUS_BUSY << 16;
397 kref_put(&srb->srb_ref, qla4xxx_srb_compl);
398 break;
399
400 case ET_CONTINUE:
401 /* Just throw away the continuation entries */
402 DEBUG2(printk("scsi%ld: %s: Continuation entry - "
403 "ignoring\n", ha->host_no, __func__));
404 break;
405
406 default:
407 /*
408 * Invalid entry in response queue, reset RISC
409 * firmware.
410 */
411 DEBUG2(printk("scsi%ld: %s: Invalid entry %x in "
412 "response queue \n", ha->host_no,
413 __func__,
414 sts_entry->hdr.entryType));
415 goto exit_prq_error;
416 }
417 ((struct response *)sts_entry)->signature = RESPONSE_PROCESSED;
418 wmb();
419 }
420
421 /*
422 * Tell ISP we're done with response(s). This also clears the interrupt.
423 */
424 ha->isp_ops->complete_iocb(ha);
425
426 return;
427
428 exit_prq_invalid_handle:
429 DEBUG2(printk("scsi%ld: %s: Invalid handle(srb)=%p type=%x IOCS=%x\n",
430 ha->host_no, __func__, srb, sts_entry->hdr.entryType,
431 sts_entry->completionStatus));
432
433 exit_prq_error:
434 ha->isp_ops->complete_iocb(ha);
435 set_bit(DPC_RESET_HA, &ha->dpc_flags);
436 }
437
438 /**
439 * qla4xxx_isr_decode_mailbox - decodes mailbox status
440 * @ha: Pointer to host adapter structure.
441 * @mailbox_status: Mailbox status.
442 *
443 * This routine decodes the mailbox status during the ISR.
444 * Hardware_lock locked upon entry. runs in interrupt context.
445 **/
446 static void qla4xxx_isr_decode_mailbox(struct scsi_qla_host * ha,
447 uint32_t mbox_status)
448 {
449 int i;
450 uint32_t mbox_sts[MBOX_AEN_REG_COUNT];
451
452 if ((mbox_status == MBOX_STS_BUSY) ||
453 (mbox_status == MBOX_STS_INTERMEDIATE_COMPLETION) ||
454 (mbox_status >> 12 == MBOX_COMPLETION_STATUS)) {
455 ha->mbox_status[0] = mbox_status;
456
457 if (test_bit(AF_MBOX_COMMAND, &ha->flags)) {
458 /*
459 * Copy all mailbox registers to a temporary
460 * location and set mailbox command done flag
461 */
462 for (i = 0; i < ha->mbox_status_count; i++)
463 ha->mbox_status[i] = is_qla8022(ha)
464 ? readl(&ha->qla4_8xxx_reg->mailbox_out[i])
465 : readl(&ha->reg->mailbox[i]);
466
467 set_bit(AF_MBOX_COMMAND_DONE, &ha->flags);
468
469 if (test_bit(AF_MBOX_COMMAND_NOPOLL, &ha->flags))
470 complete(&ha->mbx_intr_comp);
471 }
472 } else if (mbox_status >> 12 == MBOX_ASYNC_EVENT_STATUS) {
473 for (i = 0; i < MBOX_AEN_REG_COUNT; i++)
474 mbox_sts[i] = is_qla8022(ha)
475 ? readl(&ha->qla4_8xxx_reg->mailbox_out[i])
476 : readl(&ha->reg->mailbox[i]);
477
478 /* Immediately process the AENs that don't require much work.
479 * Only queue the database_changed AENs */
480 if (ha->aen_log.count < MAX_AEN_ENTRIES) {
481 for (i = 0; i < MBOX_AEN_REG_COUNT; i++)
482 ha->aen_log.entry[ha->aen_log.count].mbox_sts[i] =
483 mbox_sts[i];
484 ha->aen_log.count++;
485 }
486 switch (mbox_status) {
487 case MBOX_ASTS_SYSTEM_ERROR:
488 /* Log Mailbox registers */
489 ql4_printk(KERN_INFO, ha, "%s: System Err\n", __func__);
490 qla4xxx_dump_registers(ha);
491
492 if (ql4xdontresethba) {
493 DEBUG2(printk("scsi%ld: %s:Don't Reset HBA\n",
494 ha->host_no, __func__));
495 } else {
496 set_bit(AF_GET_CRASH_RECORD, &ha->flags);
497 set_bit(DPC_RESET_HA, &ha->dpc_flags);
498 }
499 break;
500
501 case MBOX_ASTS_REQUEST_TRANSFER_ERROR:
502 case MBOX_ASTS_RESPONSE_TRANSFER_ERROR:
503 case MBOX_ASTS_NVRAM_INVALID:
504 case MBOX_ASTS_IP_ADDRESS_CHANGED:
505 case MBOX_ASTS_DHCP_LEASE_EXPIRED:
506 DEBUG2(printk("scsi%ld: AEN %04x, ERROR Status, "
507 "Reset HA\n", ha->host_no, mbox_status));
508 set_bit(DPC_RESET_HA, &ha->dpc_flags);
509 break;
510
511 case MBOX_ASTS_LINK_UP:
512 set_bit(AF_LINK_UP, &ha->flags);
513 if (test_bit(AF_INIT_DONE, &ha->flags))
514 set_bit(DPC_LINK_CHANGED, &ha->dpc_flags);
515
516 ql4_printk(KERN_INFO, ha, "%s: LINK UP\n", __func__);
517 break;
518
519 case MBOX_ASTS_LINK_DOWN:
520 clear_bit(AF_LINK_UP, &ha->flags);
521 if (test_bit(AF_INIT_DONE, &ha->flags))
522 set_bit(DPC_LINK_CHANGED, &ha->dpc_flags);
523
524 ql4_printk(KERN_INFO, ha, "%s: LINK DOWN\n", __func__);
525 break;
526
527 case MBOX_ASTS_HEARTBEAT:
528 ha->seconds_since_last_heartbeat = 0;
529 break;
530
531 case MBOX_ASTS_DHCP_LEASE_ACQUIRED:
532 DEBUG2(printk("scsi%ld: AEN %04x DHCP LEASE "
533 "ACQUIRED\n", ha->host_no, mbox_status));
534 set_bit(DPC_GET_DHCP_IP_ADDR, &ha->dpc_flags);
535 break;
536
537 case MBOX_ASTS_PROTOCOL_STATISTIC_ALARM:
538 case MBOX_ASTS_SCSI_COMMAND_PDU_REJECTED: /* Target
539 * mode
540 * only */
541 case MBOX_ASTS_UNSOLICITED_PDU_RECEIVED: /* Connection mode */
542 case MBOX_ASTS_IPSEC_SYSTEM_FATAL_ERROR:
543 case MBOX_ASTS_SUBNET_STATE_CHANGE:
544 /* No action */
545 DEBUG2(printk("scsi%ld: AEN %04x\n", ha->host_no,
546 mbox_status));
547 break;
548
549 case MBOX_ASTS_IP_ADDR_STATE_CHANGED:
550 printk("scsi%ld: AEN %04x, mbox_sts[2]=%04x, "
551 "mbox_sts[3]=%04x\n", ha->host_no, mbox_sts[0],
552 mbox_sts[2], mbox_sts[3]);
553
554 /* mbox_sts[2] = Old ACB state
555 * mbox_sts[3] = new ACB state */
556 if ((mbox_sts[3] == ACB_STATE_VALID) &&
557 ((mbox_sts[2] == ACB_STATE_TENTATIVE) ||
558 (mbox_sts[2] == ACB_STATE_ACQUIRING)))
559 set_bit(DPC_GET_DHCP_IP_ADDR, &ha->dpc_flags);
560 else if ((mbox_sts[3] == ACB_STATE_ACQUIRING) &&
561 (mbox_sts[2] == ACB_STATE_VALID))
562 set_bit(DPC_RESET_HA, &ha->dpc_flags);
563 break;
564
565 case MBOX_ASTS_MAC_ADDRESS_CHANGED:
566 case MBOX_ASTS_DNS:
567 /* No action */
568 DEBUG2(printk(KERN_INFO "scsi%ld: AEN %04x, "
569 "mbox_sts[1]=%04x, mbox_sts[2]=%04x\n",
570 ha->host_no, mbox_sts[0],
571 mbox_sts[1], mbox_sts[2]));
572 break;
573
574 case MBOX_ASTS_SELF_TEST_FAILED:
575 case MBOX_ASTS_LOGIN_FAILED:
576 /* No action */
577 DEBUG2(printk("scsi%ld: AEN %04x, mbox_sts[1]=%04x, "
578 "mbox_sts[2]=%04x, mbox_sts[3]=%04x\n",
579 ha->host_no, mbox_sts[0], mbox_sts[1],
580 mbox_sts[2], mbox_sts[3]));
581 break;
582
583 case MBOX_ASTS_DATABASE_CHANGED:
584 /* Queue AEN information and process it in the DPC
585 * routine */
586 if (ha->aen_q_count > 0) {
587
588 /* decrement available counter */
589 ha->aen_q_count--;
590
591 for (i = 0; i < MBOX_AEN_REG_COUNT; i++)
592 ha->aen_q[ha->aen_in].mbox_sts[i] =
593 mbox_sts[i];
594
595 /* print debug message */
596 DEBUG2(printk("scsi%ld: AEN[%d] %04x queued"
597 " mb1:0x%x mb2:0x%x mb3:0x%x mb4:0x%x\n",
598 ha->host_no, ha->aen_in, mbox_sts[0],
599 mbox_sts[1], mbox_sts[2], mbox_sts[3],
600 mbox_sts[4]));
601
602 /* advance pointer */
603 ha->aen_in++;
604 if (ha->aen_in == MAX_AEN_ENTRIES)
605 ha->aen_in = 0;
606
607 /* The DPC routine will process the aen */
608 set_bit(DPC_AEN, &ha->dpc_flags);
609 } else {
610 DEBUG2(printk("scsi%ld: %s: aen %04x, queue "
611 "overflowed! AEN LOST!!\n",
612 ha->host_no, __func__,
613 mbox_sts[0]));
614
615 DEBUG2(printk("scsi%ld: DUMP AEN QUEUE\n",
616 ha->host_no));
617
618 for (i = 0; i < MAX_AEN_ENTRIES; i++) {
619 DEBUG2(printk("AEN[%d] %04x %04x %04x "
620 "%04x\n", i, mbox_sts[0],
621 mbox_sts[1], mbox_sts[2],
622 mbox_sts[3]));
623 }
624 }
625 break;
626
627 case MBOX_ASTS_TXSCVR_INSERTED:
628 DEBUG2(printk(KERN_WARNING
629 "scsi%ld: AEN %04x Transceiver"
630 " inserted\n", ha->host_no, mbox_sts[0]));
631 break;
632
633 case MBOX_ASTS_TXSCVR_REMOVED:
634 DEBUG2(printk(KERN_WARNING
635 "scsi%ld: AEN %04x Transceiver"
636 " removed\n", ha->host_no, mbox_sts[0]));
637 break;
638
639 default:
640 DEBUG2(printk(KERN_WARNING
641 "scsi%ld: AEN %04x UNKNOWN\n",
642 ha->host_no, mbox_sts[0]));
643 break;
644 }
645 } else {
646 DEBUG2(printk("scsi%ld: Unknown mailbox status %08X\n",
647 ha->host_no, mbox_status));
648
649 ha->mbox_status[0] = mbox_status;
650 }
651 }
652
653 /**
654 * qla4_8xxx_interrupt_service_routine - isr
655 * @ha: pointer to host adapter structure.
656 *
657 * This is the main interrupt service routine.
658 * hardware_lock locked upon entry. runs in interrupt context.
659 **/
660 void qla4_8xxx_interrupt_service_routine(struct scsi_qla_host *ha,
661 uint32_t intr_status)
662 {
663 /* Process response queue interrupt. */
664 if (intr_status & HSRX_RISC_IOCB_INT)
665 qla4xxx_process_response_queue(ha);
666
667 /* Process mailbox/asynch event interrupt.*/
668 if (intr_status & HSRX_RISC_MB_INT)
669 qla4xxx_isr_decode_mailbox(ha,
670 readl(&ha->qla4_8xxx_reg->mailbox_out[0]));
671
672 /* clear the interrupt */
673 writel(0, &ha->qla4_8xxx_reg->host_int);
674 readl(&ha->qla4_8xxx_reg->host_int);
675 }
676
677 /**
678 * qla4xxx_interrupt_service_routine - isr
679 * @ha: pointer to host adapter structure.
680 *
681 * This is the main interrupt service routine.
682 * hardware_lock locked upon entry. runs in interrupt context.
683 **/
684 void qla4xxx_interrupt_service_routine(struct scsi_qla_host * ha,
685 uint32_t intr_status)
686 {
687 /* Process response queue interrupt. */
688 if (intr_status & CSR_SCSI_COMPLETION_INTR)
689 qla4xxx_process_response_queue(ha);
690
691 /* Process mailbox/asynch event interrupt.*/
692 if (intr_status & CSR_SCSI_PROCESSOR_INTR) {
693 qla4xxx_isr_decode_mailbox(ha,
694 readl(&ha->reg->mailbox[0]));
695
696 /* Clear Mailbox Interrupt */
697 writel(set_rmask(CSR_SCSI_PROCESSOR_INTR),
698 &ha->reg->ctrl_status);
699 readl(&ha->reg->ctrl_status);
700 }
701 }
702
703 /**
704 * qla4_8xxx_spurious_interrupt - processes spurious interrupt
705 * @ha: pointer to host adapter structure.
706 * @reqs_count: .
707 *
708 **/
709 static void qla4_8xxx_spurious_interrupt(struct scsi_qla_host *ha,
710 uint8_t reqs_count)
711 {
712 if (reqs_count)
713 return;
714
715 DEBUG2(ql4_printk(KERN_INFO, ha, "Spurious Interrupt\n"));
716 if (is_qla8022(ha)) {
717 writel(0, &ha->qla4_8xxx_reg->host_int);
718 if (test_bit(AF_INTx_ENABLED, &ha->flags))
719 qla4_8xxx_wr_32(ha, ha->nx_legacy_intr.tgt_mask_reg,
720 0xfbff);
721 }
722 ha->spurious_int_count++;
723 }
724
725 /**
726 * qla4xxx_intr_handler - hardware interrupt handler.
727 * @irq: Unused
728 * @dev_id: Pointer to host adapter structure
729 **/
730 irqreturn_t qla4xxx_intr_handler(int irq, void *dev_id)
731 {
732 struct scsi_qla_host *ha;
733 uint32_t intr_status;
734 unsigned long flags = 0;
735 uint8_t reqs_count = 0;
736
737 ha = (struct scsi_qla_host *) dev_id;
738 if (!ha) {
739 DEBUG2(printk(KERN_INFO
740 "qla4xxx: Interrupt with NULL host ptr\n"));
741 return IRQ_NONE;
742 }
743
744 spin_lock_irqsave(&ha->hardware_lock, flags);
745
746 ha->isr_count++;
747 /*
748 * Repeatedly service interrupts up to a maximum of
749 * MAX_REQS_SERVICED_PER_INTR
750 */
751 while (1) {
752 /*
753 * Read interrupt status
754 */
755 if (ha->isp_ops->rd_shdw_rsp_q_in(ha) !=
756 ha->response_out)
757 intr_status = CSR_SCSI_COMPLETION_INTR;
758 else
759 intr_status = readl(&ha->reg->ctrl_status);
760
761 if ((intr_status &
762 (CSR_SCSI_RESET_INTR|CSR_FATAL_ERROR|INTR_PENDING)) == 0) {
763 if (reqs_count == 0)
764 ha->spurious_int_count++;
765 break;
766 }
767
768 if (intr_status & CSR_FATAL_ERROR) {
769 DEBUG2(printk(KERN_INFO "scsi%ld: Fatal Error, "
770 "Status 0x%04x\n", ha->host_no,
771 readl(isp_port_error_status (ha))));
772
773 /* Issue Soft Reset to clear this error condition.
774 * This will prevent the RISC from repeatedly
775 * interrupting the driver; thus, allowing the DPC to
776 * get scheduled to continue error recovery.
777 * NOTE: Disabling RISC interrupts does not work in
778 * this case, as CSR_FATAL_ERROR overrides
779 * CSR_SCSI_INTR_ENABLE */
780 if ((readl(&ha->reg->ctrl_status) &
781 CSR_SCSI_RESET_INTR) == 0) {
782 writel(set_rmask(CSR_SOFT_RESET),
783 &ha->reg->ctrl_status);
784 readl(&ha->reg->ctrl_status);
785 }
786
787 writel(set_rmask(CSR_FATAL_ERROR),
788 &ha->reg->ctrl_status);
789 readl(&ha->reg->ctrl_status);
790
791 __qla4xxx_disable_intrs(ha);
792
793 set_bit(DPC_RESET_HA, &ha->dpc_flags);
794
795 break;
796 } else if (intr_status & CSR_SCSI_RESET_INTR) {
797 clear_bit(AF_ONLINE, &ha->flags);
798 __qla4xxx_disable_intrs(ha);
799
800 writel(set_rmask(CSR_SCSI_RESET_INTR),
801 &ha->reg->ctrl_status);
802 readl(&ha->reg->ctrl_status);
803
804 if (!test_bit(AF_HBA_GOING_AWAY, &ha->flags))
805 set_bit(DPC_RESET_HA_INTR, &ha->dpc_flags);
806
807 break;
808 } else if (intr_status & INTR_PENDING) {
809 ha->isp_ops->interrupt_service_routine(ha, intr_status);
810 ha->total_io_count++;
811 if (++reqs_count == MAX_REQS_SERVICED_PER_INTR)
812 break;
813 }
814 }
815
816 spin_unlock_irqrestore(&ha->hardware_lock, flags);
817
818 return IRQ_HANDLED;
819 }
820
821 /**
822 * qla4_8xxx_intr_handler - hardware interrupt handler.
823 * @irq: Unused
824 * @dev_id: Pointer to host adapter structure
825 **/
826 irqreturn_t qla4_8xxx_intr_handler(int irq, void *dev_id)
827 {
828 struct scsi_qla_host *ha = dev_id;
829 uint32_t intr_status;
830 uint32_t status;
831 unsigned long flags = 0;
832 uint8_t reqs_count = 0;
833
834 if (unlikely(pci_channel_offline(ha->pdev)))
835 return IRQ_HANDLED;
836
837 ha->isr_count++;
838 status = qla4_8xxx_rd_32(ha, ISR_INT_VECTOR);
839 if (!(status & ha->nx_legacy_intr.int_vec_bit))
840 return IRQ_NONE;
841
842 status = qla4_8xxx_rd_32(ha, ISR_INT_STATE_REG);
843 if (!ISR_IS_LEGACY_INTR_TRIGGERED(status)) {
844 DEBUG2(ql4_printk(KERN_INFO, ha,
845 "%s legacy Int not triggered\n", __func__));
846 return IRQ_NONE;
847 }
848
849 /* clear the interrupt */
850 qla4_8xxx_wr_32(ha, ha->nx_legacy_intr.tgt_status_reg, 0xffffffff);
851
852 /* read twice to ensure write is flushed */
853 qla4_8xxx_rd_32(ha, ISR_INT_VECTOR);
854 qla4_8xxx_rd_32(ha, ISR_INT_VECTOR);
855
856 spin_lock_irqsave(&ha->hardware_lock, flags);
857 while (1) {
858 if (!(readl(&ha->qla4_8xxx_reg->host_int) &
859 ISRX_82XX_RISC_INT)) {
860 qla4_8xxx_spurious_interrupt(ha, reqs_count);
861 break;
862 }
863 intr_status = readl(&ha->qla4_8xxx_reg->host_status);
864 if ((intr_status &
865 (HSRX_RISC_MB_INT | HSRX_RISC_IOCB_INT)) == 0) {
866 qla4_8xxx_spurious_interrupt(ha, reqs_count);
867 break;
868 }
869
870 ha->isp_ops->interrupt_service_routine(ha, intr_status);
871
872 /* Enable Interrupt */
873 qla4_8xxx_wr_32(ha, ha->nx_legacy_intr.tgt_mask_reg, 0xfbff);
874
875 if (++reqs_count == MAX_REQS_SERVICED_PER_INTR)
876 break;
877 }
878
879 spin_unlock_irqrestore(&ha->hardware_lock, flags);
880 return IRQ_HANDLED;
881 }
882
883 irqreturn_t
884 qla4_8xxx_msi_handler(int irq, void *dev_id)
885 {
886 struct scsi_qla_host *ha;
887
888 ha = (struct scsi_qla_host *) dev_id;
889 if (!ha) {
890 DEBUG2(printk(KERN_INFO
891 "qla4xxx: MSIX: Interrupt with NULL host ptr\n"));
892 return IRQ_NONE;
893 }
894
895 ha->isr_count++;
896 /* clear the interrupt */
897 qla4_8xxx_wr_32(ha, ha->nx_legacy_intr.tgt_status_reg, 0xffffffff);
898
899 /* read twice to ensure write is flushed */
900 qla4_8xxx_rd_32(ha, ISR_INT_VECTOR);
901 qla4_8xxx_rd_32(ha, ISR_INT_VECTOR);
902
903 return qla4_8xxx_default_intr_handler(irq, dev_id);
904 }
905
906 /**
907 * qla4_8xxx_default_intr_handler - hardware interrupt handler.
908 * @irq: Unused
909 * @dev_id: Pointer to host adapter structure
910 *
911 * This interrupt handler is called directly for MSI-X, and
912 * called indirectly for MSI.
913 **/
914 irqreturn_t
915 qla4_8xxx_default_intr_handler(int irq, void *dev_id)
916 {
917 struct scsi_qla_host *ha = dev_id;
918 unsigned long flags;
919 uint32_t intr_status;
920 uint8_t reqs_count = 0;
921
922 spin_lock_irqsave(&ha->hardware_lock, flags);
923 while (1) {
924 if (!(readl(&ha->qla4_8xxx_reg->host_int) &
925 ISRX_82XX_RISC_INT)) {
926 qla4_8xxx_spurious_interrupt(ha, reqs_count);
927 break;
928 }
929
930 intr_status = readl(&ha->qla4_8xxx_reg->host_status);
931 if ((intr_status &
932 (HSRX_RISC_MB_INT | HSRX_RISC_IOCB_INT)) == 0) {
933 qla4_8xxx_spurious_interrupt(ha, reqs_count);
934 break;
935 }
936
937 ha->isp_ops->interrupt_service_routine(ha, intr_status);
938
939 if (++reqs_count == MAX_REQS_SERVICED_PER_INTR)
940 break;
941 }
942
943 ha->isr_count++;
944 spin_unlock_irqrestore(&ha->hardware_lock, flags);
945 return IRQ_HANDLED;
946 }
947
948 irqreturn_t
949 qla4_8xxx_msix_rsp_q(int irq, void *dev_id)
950 {
951 struct scsi_qla_host *ha = dev_id;
952 unsigned long flags;
953
954 spin_lock_irqsave(&ha->hardware_lock, flags);
955 qla4xxx_process_response_queue(ha);
956 writel(0, &ha->qla4_8xxx_reg->host_int);
957 spin_unlock_irqrestore(&ha->hardware_lock, flags);
958
959 ha->isr_count++;
960 return IRQ_HANDLED;
961 }
962
963 /**
964 * qla4xxx_process_aen - processes AENs generated by firmware
965 * @ha: pointer to host adapter structure.
966 * @process_aen: type of AENs to process
967 *
968 * Processes specific types of Asynchronous Events generated by firmware.
969 * The type of AENs to process is specified by process_aen and can be
970 * PROCESS_ALL_AENS 0
971 * FLUSH_DDB_CHANGED_AENS 1
972 * RELOGIN_DDB_CHANGED_AENS 2
973 **/
974 void qla4xxx_process_aen(struct scsi_qla_host * ha, uint8_t process_aen)
975 {
976 uint32_t mbox_sts[MBOX_AEN_REG_COUNT];
977 struct aen *aen;
978 int i;
979 unsigned long flags;
980
981 spin_lock_irqsave(&ha->hardware_lock, flags);
982 while (ha->aen_out != ha->aen_in) {
983 aen = &ha->aen_q[ha->aen_out];
984 /* copy aen information to local structure */
985 for (i = 0; i < MBOX_AEN_REG_COUNT; i++)
986 mbox_sts[i] = aen->mbox_sts[i];
987
988 ha->aen_q_count++;
989 ha->aen_out++;
990
991 if (ha->aen_out == MAX_AEN_ENTRIES)
992 ha->aen_out = 0;
993
994 spin_unlock_irqrestore(&ha->hardware_lock, flags);
995
996 DEBUG2(printk("qla4xxx(%ld): AEN[%d]=0x%08x, mbx1=0x%08x mbx2=0x%08x"
997 " mbx3=0x%08x mbx4=0x%08x\n", ha->host_no,
998 (ha->aen_out ? (ha->aen_out-1): (MAX_AEN_ENTRIES-1)),
999 mbox_sts[0], mbox_sts[1], mbox_sts[2],
1000 mbox_sts[3], mbox_sts[4]));
1001
1002 switch (mbox_sts[0]) {
1003 case MBOX_ASTS_DATABASE_CHANGED:
1004 if (process_aen == FLUSH_DDB_CHANGED_AENS) {
1005 DEBUG2(printk("scsi%ld: AEN[%d] %04x, index "
1006 "[%d] state=%04x FLUSHED!\n",
1007 ha->host_no, ha->aen_out,
1008 mbox_sts[0], mbox_sts[2],
1009 mbox_sts[3]));
1010 break;
1011 } else if (process_aen == RELOGIN_DDB_CHANGED_AENS) {
1012 /* for use during init time, we only want to
1013 * relogin non-active ddbs */
1014 struct ddb_entry *ddb_entry;
1015
1016 ddb_entry =
1017 /* FIXME: name length? */
1018 qla4xxx_lookup_ddb_by_fw_index(ha,
1019 mbox_sts[2]);
1020 if (!ddb_entry)
1021 break;
1022
1023 ddb_entry->dev_scan_wait_to_complete_relogin =
1024 0;
1025 ddb_entry->dev_scan_wait_to_start_relogin =
1026 jiffies +
1027 ((ddb_entry->default_time2wait +
1028 4) * HZ);
1029
1030 DEBUG2(printk("scsi%ld: ddb [%d] initate"
1031 " RELOGIN after %d seconds\n",
1032 ha->host_no,
1033 ddb_entry->fw_ddb_index,
1034 ddb_entry->default_time2wait +
1035 4));
1036 break;
1037 }
1038
1039 if (mbox_sts[1] == 0) { /* Global DB change. */
1040 qla4xxx_reinitialize_ddb_list(ha);
1041 } else if (mbox_sts[1] == 1) { /* Specific device. */
1042 qla4xxx_process_ddb_changed(ha, mbox_sts[2],
1043 mbox_sts[3], mbox_sts[4]);
1044 }
1045 break;
1046 }
1047 spin_lock_irqsave(&ha->hardware_lock, flags);
1048 }
1049 spin_unlock_irqrestore(&ha->hardware_lock, flags);
1050 }
1051
1052 int qla4xxx_request_irqs(struct scsi_qla_host *ha)
1053 {
1054 int ret;
1055
1056 if (!is_qla8022(ha))
1057 goto try_intx;
1058
1059 if (ql4xenablemsix == 2)
1060 goto try_msi;
1061
1062 if (ql4xenablemsix == 0 || ql4xenablemsix != 1)
1063 goto try_intx;
1064
1065 /* Trying MSI-X */
1066 ret = qla4_8xxx_enable_msix(ha);
1067 if (!ret) {
1068 DEBUG2(ql4_printk(KERN_INFO, ha,
1069 "MSI-X: Enabled (0x%X).\n", ha->revision_id));
1070 goto irq_attached;
1071 }
1072
1073 ql4_printk(KERN_WARNING, ha,
1074 "MSI-X: Falling back-to MSI mode -- %d.\n", ret);
1075
1076 try_msi:
1077 /* Trying MSI */
1078 ret = pci_enable_msi(ha->pdev);
1079 if (!ret) {
1080 ret = request_irq(ha->pdev->irq, qla4_8xxx_msi_handler,
1081 0, DRIVER_NAME, ha);
1082 if (!ret) {
1083 DEBUG2(ql4_printk(KERN_INFO, ha, "MSI: Enabled.\n"));
1084 set_bit(AF_MSI_ENABLED, &ha->flags);
1085 goto irq_attached;
1086 } else {
1087 ql4_printk(KERN_WARNING, ha,
1088 "MSI: Failed to reserve interrupt %d "
1089 "already in use.\n", ha->pdev->irq);
1090 pci_disable_msi(ha->pdev);
1091 }
1092 }
1093 ql4_printk(KERN_WARNING, ha,
1094 "MSI: Falling back-to INTx mode -- %d.\n", ret);
1095
1096 try_intx:
1097 /* Trying INTx */
1098 ret = request_irq(ha->pdev->irq, ha->isp_ops->intr_handler,
1099 IRQF_SHARED, DRIVER_NAME, ha);
1100 if (!ret) {
1101 DEBUG2(ql4_printk(KERN_INFO, ha, "INTx: Enabled.\n"));
1102 set_bit(AF_INTx_ENABLED, &ha->flags);
1103 goto irq_attached;
1104
1105 } else {
1106 ql4_printk(KERN_WARNING, ha,
1107 "INTx: Failed to reserve interrupt %d already in"
1108 " use.\n", ha->pdev->irq);
1109 return ret;
1110 }
1111
1112 irq_attached:
1113 set_bit(AF_IRQ_ATTACHED, &ha->flags);
1114 ha->host->irq = ha->pdev->irq;
1115 ql4_printk(KERN_INFO, ha, "%s: irq %d attached\n",
1116 __func__, ha->pdev->irq);
1117 return ret;
1118 }
1119
1120 void qla4xxx_free_irqs(struct scsi_qla_host *ha)
1121 {
1122 if (test_bit(AF_MSIX_ENABLED, &ha->flags))
1123 qla4_8xxx_disable_msix(ha);
1124 else if (test_and_clear_bit(AF_MSI_ENABLED, &ha->flags)) {
1125 free_irq(ha->pdev->irq, ha);
1126 pci_disable_msi(ha->pdev);
1127 } else if (test_and_clear_bit(AF_INTx_ENABLED, &ha->flags))
1128 free_irq(ha->pdev->irq, ha);
1129 }
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree