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drivers/media: static should be at beginning of declaration
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / scsi / qla4xxx / ql4_isr.c
blob0e72921c752d497547e49e59e078aaf38d54bb36
1 /*
2 * QLogic iSCSI HBA Driver
3 * Copyright (c) 2003-2010 QLogic Corporation
4 *
5 * See LICENSE.qla4xxx for copyright and licensing details.
6 */
7
8 #include "ql4_def.h"
9 #include "ql4_glbl.h"
10 #include "ql4_dbg.h"
11 #include "ql4_inline.h"
12
13 /**
14 * qla4xxx_copy_sense - copy sense data into cmd sense buffer
15 * @ha: Pointer to host adapter structure.
16 * @sts_entry: Pointer to status entry structure.
17 * @srb: Pointer to srb structure.
18 **/
19 static void qla4xxx_copy_sense(struct scsi_qla_host *ha,
20 struct status_entry *sts_entry,
21 struct srb *srb)
22 {
23 struct scsi_cmnd *cmd = srb->cmd;
24 uint16_t sense_len;
25
26 memset(cmd->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
27 sense_len = le16_to_cpu(sts_entry->senseDataByteCnt);
28 if (sense_len == 0) {
29 DEBUG2(ql4_printk(KERN_INFO, ha, "scsi%ld:%d:%d:%d: %s:"
30 " sense len 0\n", ha->host_no,
31 cmd->device->channel, cmd->device->id,
32 cmd->device->lun, __func__));
33 ha->status_srb = NULL;
34 return;
35 }
36 /* Save total available sense length,
37 * not to exceed cmd's sense buffer size */
38 sense_len = min_t(uint16_t, sense_len, SCSI_SENSE_BUFFERSIZE);
39 srb->req_sense_ptr = cmd->sense_buffer;
40 srb->req_sense_len = sense_len;
41
42 /* Copy sense from sts_entry pkt */
43 sense_len = min_t(uint16_t, sense_len, IOCB_MAX_SENSEDATA_LEN);
44 memcpy(cmd->sense_buffer, sts_entry->senseData, sense_len);
45
46 DEBUG2(printk(KERN_INFO "scsi%ld:%d:%d:%d: %s: sense key = %x, "
47 "ASL= %02x, ASC/ASCQ = %02x/%02x\n", ha->host_no,
48 cmd->device->channel, cmd->device->id,
49 cmd->device->lun, __func__,
50 sts_entry->senseData[2] & 0x0f,
51 sts_entry->senseData[7],
52 sts_entry->senseData[12],
53 sts_entry->senseData[13]));
54
55 DEBUG5(qla4xxx_dump_buffer(cmd->sense_buffer, sense_len));
56 srb->flags |= SRB_GOT_SENSE;
57
58 /* Update srb, in case a sts_cont pkt follows */
59 srb->req_sense_ptr += sense_len;
60 srb->req_sense_len -= sense_len;
61 if (srb->req_sense_len != 0)
62 ha->status_srb = srb;
63 else
64 ha->status_srb = NULL;
65 }
66
67 /**
68 * qla4xxx_status_cont_entry - Process a Status Continuations entry.
69 * @ha: SCSI driver HA context
70 * @sts_cont: Entry pointer
71 *
72 * Extended sense data.
73 */
74 static void
75 qla4xxx_status_cont_entry(struct scsi_qla_host *ha,
76 struct status_cont_entry *sts_cont)
77 {
78 struct srb *srb = ha->status_srb;
79 struct scsi_cmnd *cmd;
80 uint16_t sense_len;
81
82 if (srb == NULL)
83 return;
84
85 cmd = srb->cmd;
86 if (cmd == NULL) {
87 DEBUG2(printk(KERN_INFO "scsi%ld: %s: Cmd already returned "
88 "back to OS srb=%p srb->state:%d\n", ha->host_no,
89 __func__, srb, srb->state));
90 ha->status_srb = NULL;
91 return;
92 }
93
94 /* Copy sense data. */
95 sense_len = min_t(uint16_t, srb->req_sense_len,
96 IOCB_MAX_EXT_SENSEDATA_LEN);
97 memcpy(srb->req_sense_ptr, sts_cont->ext_sense_data, sense_len);
98 DEBUG5(qla4xxx_dump_buffer(srb->req_sense_ptr, sense_len));
99
100 srb->req_sense_ptr += sense_len;
101 srb->req_sense_len -= sense_len;
102
103 /* Place command on done queue. */
104 if (srb->req_sense_len == 0) {
105 kref_put(&srb->srb_ref, qla4xxx_srb_compl);
106 ha->status_srb = NULL;
107 }
108 }
109
110 /**
111 * qla4xxx_status_entry - processes status IOCBs
112 * @ha: Pointer to host adapter structure.
113 * @sts_entry: Pointer to status entry structure.
114 **/
115 static void qla4xxx_status_entry(struct scsi_qla_host *ha,
116 struct status_entry *sts_entry)
117 {
118 uint8_t scsi_status;
119 struct scsi_cmnd *cmd;
120 struct srb *srb;
121 struct ddb_entry *ddb_entry;
122 uint32_t residual;
123
124 srb = qla4xxx_del_from_active_array(ha, le32_to_cpu(sts_entry->handle));
125 if (!srb) {
126 DEBUG2(printk(KERN_WARNING "scsi%ld: %s: Status Entry invalid "
127 "handle 0x%x, sp=%p. This cmd may have already "
128 "been completed.\n", ha->host_no, __func__,
129 le32_to_cpu(sts_entry->handle), srb));
130 ql4_printk(KERN_WARNING, ha, "%s invalid status entry:"
131 " handle=0x%0x\n", __func__, sts_entry->handle);
132 set_bit(DPC_RESET_HA, &ha->dpc_flags);
133 return;
134 }
135
136 cmd = srb->cmd;
137 if (cmd == NULL) {
138 DEBUG2(printk("scsi%ld: %s: Command already returned back to "
139 "OS pkt->handle=%d srb=%p srb->state:%d\n",
140 ha->host_no, __func__, sts_entry->handle,
141 srb, srb->state));
142 ql4_printk(KERN_WARNING, ha, "Command is NULL:"
143 " already returned to OS (srb=%p)\n", srb);
144 return;
145 }
146
147 ddb_entry = srb->ddb;
148 if (ddb_entry == NULL) {
149 cmd->result = DID_NO_CONNECT << 16;
150 goto status_entry_exit;
151 }
152
153 residual = le32_to_cpu(sts_entry->residualByteCnt);
154
155 /* Translate ISP error to a Linux SCSI error. */
156 scsi_status = sts_entry->scsiStatus;
157 switch (sts_entry->completionStatus) {
158 case SCS_COMPLETE:
159
160 if (sts_entry->iscsiFlags & ISCSI_FLAG_RESIDUAL_OVER) {
161 cmd->result = DID_ERROR << 16;
162 break;
163 }
164
165 if (sts_entry->iscsiFlags &ISCSI_FLAG_RESIDUAL_UNDER) {
166 scsi_set_resid(cmd, residual);
167 if (!scsi_status && ((scsi_bufflen(cmd) - residual) <
168 cmd->underflow)) {
169
170 cmd->result = DID_ERROR << 16;
171
172 DEBUG2(printk("scsi%ld:%d:%d:%d: %s: "
173 "Mid-layer Data underrun0, "
174 "xferlen = 0x%x, "
175 "residual = 0x%x\n", ha->host_no,
176 cmd->device->channel,
177 cmd->device->id,
178 cmd->device->lun, __func__,
179 scsi_bufflen(cmd), residual));
180 break;
181 }
182 }
183
184 cmd->result = DID_OK << 16 | scsi_status;
185
186 if (scsi_status != SCSI_CHECK_CONDITION)
187 break;
188
189 /* Copy Sense Data into sense buffer. */
190 qla4xxx_copy_sense(ha, sts_entry, srb);
191 break;
192
193 case SCS_INCOMPLETE:
194 /* Always set the status to DID_ERROR, since
195 * all conditions result in that status anyway */
196 cmd->result = DID_ERROR << 16;
197 break;
198
199 case SCS_RESET_OCCURRED:
200 DEBUG2(printk("scsi%ld:%d:%d:%d: %s: Device RESET occurred\n",
201 ha->host_no, cmd->device->channel,
202 cmd->device->id, cmd->device->lun, __func__));
203
204 cmd->result = DID_RESET << 16;
205 break;
206
207 case SCS_ABORTED:
208 DEBUG2(printk("scsi%ld:%d:%d:%d: %s: Abort occurred\n",
209 ha->host_no, cmd->device->channel,
210 cmd->device->id, cmd->device->lun, __func__));
211
212 cmd->result = DID_RESET << 16;
213 break;
214
215 case SCS_TIMEOUT:
216 DEBUG2(printk(KERN_INFO "scsi%ld:%d:%d:%d: Timeout\n",
217 ha->host_no, cmd->device->channel,
218 cmd->device->id, cmd->device->lun));
219
220 cmd->result = DID_TRANSPORT_DISRUPTED << 16;
221
222 /*
223 * Mark device missing so that we won't continue to send
224 * I/O to this device. We should get a ddb state change
225 * AEN soon.
226 */
227 if (atomic_read(&ddb_entry->state) == DDB_STATE_ONLINE)
228 qla4xxx_mark_device_missing(ha, ddb_entry);
229 break;
230
231 case SCS_DATA_UNDERRUN:
232 case SCS_DATA_OVERRUN:
233 if ((sts_entry->iscsiFlags & ISCSI_FLAG_RESIDUAL_OVER) ||
234 (sts_entry->completionStatus == SCS_DATA_OVERRUN)) {
235 DEBUG2(printk("scsi%ld:%d:%d:%d: %s: " "Data overrun\n",
236 ha->host_no,
237 cmd->device->channel, cmd->device->id,
238 cmd->device->lun, __func__));
239
240 cmd->result = DID_ERROR << 16;
241 break;
242 }
243
244 scsi_set_resid(cmd, residual);
245
246 /*
247 * If there is scsi_status, it takes precedense over
248 * underflow condition.
249 */
250 if (scsi_status != 0) {
251 cmd->result = DID_OK << 16 | scsi_status;
252
253 if (scsi_status != SCSI_CHECK_CONDITION)
254 break;
255
256 /* Copy Sense Data into sense buffer. */
257 qla4xxx_copy_sense(ha, sts_entry, srb);
258 } else {
259 /*
260 * If RISC reports underrun and target does not
261 * report it then we must have a lost frame, so
262 * tell upper layer to retry it by reporting a
263 * bus busy.
264 */
265 if ((sts_entry->iscsiFlags &
266 ISCSI_FLAG_RESIDUAL_UNDER) == 0) {
267 cmd->result = DID_BUS_BUSY << 16;
268 } else if ((scsi_bufflen(cmd) - residual) <
269 cmd->underflow) {
270 /*
271 * Handle mid-layer underflow???
272 *
273 * For kernels less than 2.4, the driver must
274 * return an error if an underflow is detected.
275 * For kernels equal-to and above 2.4, the
276 * mid-layer will appearantly handle the
277 * underflow by detecting the residual count --
278 * unfortunately, we do not see where this is
279 * actually being done. In the interim, we
280 * will return DID_ERROR.
281 */
282 DEBUG2(printk("scsi%ld:%d:%d:%d: %s: "
283 "Mid-layer Data underrun1, "
284 "xferlen = 0x%x, "
285 "residual = 0x%x\n", ha->host_no,
286 cmd->device->channel,
287 cmd->device->id,
288 cmd->device->lun, __func__,
289 scsi_bufflen(cmd), residual));
290
291 cmd->result = DID_ERROR << 16;
292 } else {
293 cmd->result = DID_OK << 16;
294 }
295 }
296 break;
297
298 case SCS_DEVICE_LOGGED_OUT:
299 case SCS_DEVICE_UNAVAILABLE:
300 DEBUG2(printk(KERN_INFO "scsi%ld:%d:%d:%d: SCS_DEVICE "
301 "state: 0x%x\n", ha->host_no,
302 cmd->device->channel, cmd->device->id,
303 cmd->device->lun, sts_entry->completionStatus));
304 /*
305 * Mark device missing so that we won't continue to
306 * send I/O to this device. We should get a ddb
307 * state change AEN soon.
308 */
309 if (atomic_read(&ddb_entry->state) == DDB_STATE_ONLINE)
310 qla4xxx_mark_device_missing(ha, ddb_entry);
311
312 cmd->result = DID_TRANSPORT_DISRUPTED << 16;
313 break;
314
315 case SCS_QUEUE_FULL:
316 /*
317 * SCSI Mid-Layer handles device queue full
318 */
319 cmd->result = DID_OK << 16 | sts_entry->scsiStatus;
320 DEBUG2(printk("scsi%ld:%d:%d: %s: QUEUE FULL detected "
321 "compl=%02x, scsi=%02x, state=%02x, iFlags=%02x,"
322 " iResp=%02x\n", ha->host_no, cmd->device->id,
323 cmd->device->lun, __func__,
324 sts_entry->completionStatus,
325 sts_entry->scsiStatus, sts_entry->state_flags,
326 sts_entry->iscsiFlags,
327 sts_entry->iscsiResponse));
328 break;
329
330 default:
331 cmd->result = DID_ERROR << 16;
332 break;
333 }
334
335 status_entry_exit:
336
337 /* complete the request, if not waiting for status_continuation pkt */
338 srb->cc_stat = sts_entry->completionStatus;
339 if (ha->status_srb == NULL)
340 kref_put(&srb->srb_ref, qla4xxx_srb_compl);
341 }
342
343 /**
344 * qla4xxx_process_response_queue - process response queue completions
345 * @ha: Pointer to host adapter structure.
346 *
347 * This routine process response queue completions in interrupt context.
348 * Hardware_lock locked upon entry
349 **/
350 void qla4xxx_process_response_queue(struct scsi_qla_host *ha)
351 {
352 uint32_t count = 0;
353 struct srb *srb = NULL;
354 struct status_entry *sts_entry;
355
356 /* Process all responses from response queue */
357 while ((ha->response_ptr->signature != RESPONSE_PROCESSED)) {
358 sts_entry = (struct status_entry *) ha->response_ptr;
359 count++;
360
361 /* Advance pointers for next entry */
362 if (ha->response_out == (RESPONSE_QUEUE_DEPTH - 1)) {
363 ha->response_out = 0;
364 ha->response_ptr = ha->response_ring;
365 } else {
366 ha->response_out++;
367 ha->response_ptr++;
368 }
369
370 /* process entry */
371 switch (sts_entry->hdr.entryType) {
372 case ET_STATUS:
373 /* Common status */
374 qla4xxx_status_entry(ha, sts_entry);
375 break;
376
377 case ET_PASSTHRU_STATUS:
378 break;
379
380 case ET_STATUS_CONTINUATION:
381 qla4xxx_status_cont_entry(ha,
382 (struct status_cont_entry *) sts_entry);
383 break;
384
385 case ET_COMMAND:
386 /* ISP device queue is full. Command not
387 * accepted by ISP. Queue command for
388 * later */
389
390 srb = qla4xxx_del_from_active_array(ha,
391 le32_to_cpu(sts_entry->
392 handle));
393 if (srb == NULL)
394 goto exit_prq_invalid_handle;
395
396 DEBUG2(printk("scsi%ld: %s: FW device queue full, "
397 "srb %p\n", ha->host_no, __func__, srb));
398
399 /* ETRY normally by sending it back with
400 * DID_BUS_BUSY */
401 srb->cmd->result = DID_BUS_BUSY << 16;
402 kref_put(&srb->srb_ref, qla4xxx_srb_compl);
403 break;
404
405 case ET_CONTINUE:
406 /* Just throw away the continuation entries */
407 DEBUG2(printk("scsi%ld: %s: Continuation entry - "
408 "ignoring\n", ha->host_no, __func__));
409 break;
410
411 default:
412 /*
413 * Invalid entry in response queue, reset RISC
414 * firmware.
415 */
416 DEBUG2(printk("scsi%ld: %s: Invalid entry %x in "
417 "response queue \n", ha->host_no,
418 __func__,
419 sts_entry->hdr.entryType));
420 goto exit_prq_error;
421 }
422 ((struct response *)sts_entry)->signature = RESPONSE_PROCESSED;
423 wmb();
424 }
425
426 /*
427 * Tell ISP we're done with response(s). This also clears the interrupt.
428 */
429 ha->isp_ops->complete_iocb(ha);
430
431 return;
432
433 exit_prq_invalid_handle:
434 DEBUG2(printk("scsi%ld: %s: Invalid handle(srb)=%p type=%x IOCS=%x\n",
435 ha->host_no, __func__, srb, sts_entry->hdr.entryType,
436 sts_entry->completionStatus));
437
438 exit_prq_error:
439 ha->isp_ops->complete_iocb(ha);
440 set_bit(DPC_RESET_HA, &ha->dpc_flags);
441 }
442
443 /**
444 * qla4xxx_isr_decode_mailbox - decodes mailbox status
445 * @ha: Pointer to host adapter structure.
446 * @mailbox_status: Mailbox status.
447 *
448 * This routine decodes the mailbox status during the ISR.
449 * Hardware_lock locked upon entry. runs in interrupt context.
450 **/
451 static void qla4xxx_isr_decode_mailbox(struct scsi_qla_host * ha,
452 uint32_t mbox_status)
453 {
454 int i;
455 uint32_t mbox_sts[MBOX_AEN_REG_COUNT];
456
457 if ((mbox_status == MBOX_STS_BUSY) ||
458 (mbox_status == MBOX_STS_INTERMEDIATE_COMPLETION) ||
459 (mbox_status >> 12 == MBOX_COMPLETION_STATUS)) {
460 ha->mbox_status[0] = mbox_status;
461
462 if (test_bit(AF_MBOX_COMMAND, &ha->flags)) {
463 /*
464 * Copy all mailbox registers to a temporary
465 * location and set mailbox command done flag
466 */
467 for (i = 0; i < ha->mbox_status_count; i++)
468 ha->mbox_status[i] = is_qla8022(ha)
469 ? readl(&ha->qla4_8xxx_reg->mailbox_out[i])
470 : readl(&ha->reg->mailbox[i]);
471
472 set_bit(AF_MBOX_COMMAND_DONE, &ha->flags);
473
474 if (test_bit(AF_MBOX_COMMAND_NOPOLL, &ha->flags))
475 complete(&ha->mbx_intr_comp);
476 }
477 } else if (mbox_status >> 12 == MBOX_ASYNC_EVENT_STATUS) {
478 for (i = 0; i < MBOX_AEN_REG_COUNT; i++)
479 mbox_sts[i] = is_qla8022(ha)
480 ? readl(&ha->qla4_8xxx_reg->mailbox_out[i])
481 : readl(&ha->reg->mailbox[i]);
482
483 /* Immediately process the AENs that don't require much work.
484 * Only queue the database_changed AENs */
485 if (ha->aen_log.count < MAX_AEN_ENTRIES) {
486 for (i = 0; i < MBOX_AEN_REG_COUNT; i++)
487 ha->aen_log.entry[ha->aen_log.count].mbox_sts[i] =
488 mbox_sts[i];
489 ha->aen_log.count++;
490 }
491 switch (mbox_status) {
492 case MBOX_ASTS_SYSTEM_ERROR:
493 /* Log Mailbox registers */
494 ql4_printk(KERN_INFO, ha, "%s: System Err\n", __func__);
495 qla4xxx_dump_registers(ha);
496
497 if (ql4xdontresethba) {
498 DEBUG2(printk("scsi%ld: %s:Don't Reset HBA\n",
499 ha->host_no, __func__));
500 } else {
501 set_bit(AF_GET_CRASH_RECORD, &ha->flags);
502 set_bit(DPC_RESET_HA, &ha->dpc_flags);
503 }
504 break;
505
506 case MBOX_ASTS_REQUEST_TRANSFER_ERROR:
507 case MBOX_ASTS_RESPONSE_TRANSFER_ERROR:
508 case MBOX_ASTS_NVRAM_INVALID:
509 case MBOX_ASTS_IP_ADDRESS_CHANGED:
510 case MBOX_ASTS_DHCP_LEASE_EXPIRED:
511 DEBUG2(printk("scsi%ld: AEN %04x, ERROR Status, "
512 "Reset HA\n", ha->host_no, mbox_status));
513 set_bit(DPC_RESET_HA, &ha->dpc_flags);
514 break;
515
516 case MBOX_ASTS_LINK_UP:
517 set_bit(AF_LINK_UP, &ha->flags);
518 if (test_bit(AF_INIT_DONE, &ha->flags))
519 set_bit(DPC_LINK_CHANGED, &ha->dpc_flags);
520
521 ql4_printk(KERN_INFO, ha, "%s: LINK UP\n", __func__);
522 break;
523
524 case MBOX_ASTS_LINK_DOWN:
525 clear_bit(AF_LINK_UP, &ha->flags);
526 if (test_bit(AF_INIT_DONE, &ha->flags))
527 set_bit(DPC_LINK_CHANGED, &ha->dpc_flags);
528
529 ql4_printk(KERN_INFO, ha, "%s: LINK DOWN\n", __func__);
530 break;
531
532 case MBOX_ASTS_HEARTBEAT:
533 ha->seconds_since_last_heartbeat = 0;
534 break;
535
536 case MBOX_ASTS_DHCP_LEASE_ACQUIRED:
537 DEBUG2(printk("scsi%ld: AEN %04x DHCP LEASE "
538 "ACQUIRED\n", ha->host_no, mbox_status));
539 set_bit(DPC_GET_DHCP_IP_ADDR, &ha->dpc_flags);
540 break;
541
542 case MBOX_ASTS_PROTOCOL_STATISTIC_ALARM:
543 case MBOX_ASTS_SCSI_COMMAND_PDU_REJECTED: /* Target
544 * mode
545 * only */
546 case MBOX_ASTS_UNSOLICITED_PDU_RECEIVED: /* Connection mode */
547 case MBOX_ASTS_IPSEC_SYSTEM_FATAL_ERROR:
548 case MBOX_ASTS_SUBNET_STATE_CHANGE:
549 case MBOX_ASTS_DUPLICATE_IP:
550 /* No action */
551 DEBUG2(printk("scsi%ld: AEN %04x\n", ha->host_no,
552 mbox_status));
553 break;
554
555 case MBOX_ASTS_IP_ADDR_STATE_CHANGED:
556 printk("scsi%ld: AEN %04x, mbox_sts[2]=%04x, "
557 "mbox_sts[3]=%04x\n", ha->host_no, mbox_sts[0],
558 mbox_sts[2], mbox_sts[3]);
559
560 /* mbox_sts[2] = Old ACB state
561 * mbox_sts[3] = new ACB state */
562 if ((mbox_sts[3] == ACB_STATE_VALID) &&
563 ((mbox_sts[2] == ACB_STATE_TENTATIVE) ||
564 (mbox_sts[2] == ACB_STATE_ACQUIRING)))
565 set_bit(DPC_GET_DHCP_IP_ADDR, &ha->dpc_flags);
566 else if ((mbox_sts[3] == ACB_STATE_ACQUIRING) &&
567 (mbox_sts[2] == ACB_STATE_VALID))
568 set_bit(DPC_RESET_HA, &ha->dpc_flags);
569 break;
570
571 case MBOX_ASTS_MAC_ADDRESS_CHANGED:
572 case MBOX_ASTS_DNS:
573 /* No action */
574 DEBUG2(printk(KERN_INFO "scsi%ld: AEN %04x, "
575 "mbox_sts[1]=%04x, mbox_sts[2]=%04x\n",
576 ha->host_no, mbox_sts[0],
577 mbox_sts[1], mbox_sts[2]));
578 break;
579
580 case MBOX_ASTS_SELF_TEST_FAILED:
581 case MBOX_ASTS_LOGIN_FAILED:
582 /* No action */
583 DEBUG2(printk("scsi%ld: AEN %04x, mbox_sts[1]=%04x, "
584 "mbox_sts[2]=%04x, mbox_sts[3]=%04x\n",
585 ha->host_no, mbox_sts[0], mbox_sts[1],
586 mbox_sts[2], mbox_sts[3]));
587 break;
588
589 case MBOX_ASTS_DATABASE_CHANGED:
590 /* Queue AEN information and process it in the DPC
591 * routine */
592 if (ha->aen_q_count > 0) {
593
594 /* decrement available counter */
595 ha->aen_q_count--;
596
597 for (i = 0; i < MBOX_AEN_REG_COUNT; i++)
598 ha->aen_q[ha->aen_in].mbox_sts[i] =
599 mbox_sts[i];
600
601 /* print debug message */
602 DEBUG2(printk("scsi%ld: AEN[%d] %04x queued "
603 "mb1:0x%x mb2:0x%x mb3:0x%x "
604 "mb4:0x%x mb5:0x%x\n",
605 ha->host_no, ha->aen_in,
606 mbox_sts[0], mbox_sts[1],
607 mbox_sts[2], mbox_sts[3],
608 mbox_sts[4], mbox_sts[5]));
609
610 /* advance pointer */
611 ha->aen_in++;
612 if (ha->aen_in == MAX_AEN_ENTRIES)
613 ha->aen_in = 0;
614
615 /* The DPC routine will process the aen */
616 set_bit(DPC_AEN, &ha->dpc_flags);
617 } else {
618 DEBUG2(printk("scsi%ld: %s: aen %04x, queue "
619 "overflowed! AEN LOST!!\n",
620 ha->host_no, __func__,
621 mbox_sts[0]));
622
623 DEBUG2(printk("scsi%ld: DUMP AEN QUEUE\n",
624 ha->host_no));
625
626 for (i = 0; i < MAX_AEN_ENTRIES; i++) {
627 DEBUG2(printk("AEN[%d] %04x %04x %04x "
628 "%04x\n", i, mbox_sts[0],
629 mbox_sts[1], mbox_sts[2],
630 mbox_sts[3]));
631 }
632 }
633 break;
634
635 case MBOX_ASTS_TXSCVR_INSERTED:
636 DEBUG2(printk(KERN_WARNING
637 "scsi%ld: AEN %04x Transceiver"
638 " inserted\n", ha->host_no, mbox_sts[0]));
639 break;
640
641 case MBOX_ASTS_TXSCVR_REMOVED:
642 DEBUG2(printk(KERN_WARNING
643 "scsi%ld: AEN %04x Transceiver"
644 " removed\n", ha->host_no, mbox_sts[0]));
645 break;
646
647 default:
648 DEBUG2(printk(KERN_WARNING
649 "scsi%ld: AEN %04x UNKNOWN\n",
650 ha->host_no, mbox_sts[0]));
651 break;
652 }
653 } else {
654 DEBUG2(printk("scsi%ld: Unknown mailbox status %08X\n",
655 ha->host_no, mbox_status));
656
657 ha->mbox_status[0] = mbox_status;
658 }
659 }
660
661 /**
662 * qla4_8xxx_interrupt_service_routine - isr
663 * @ha: pointer to host adapter structure.
664 *
665 * This is the main interrupt service routine.
666 * hardware_lock locked upon entry. runs in interrupt context.
667 **/
668 void qla4_8xxx_interrupt_service_routine(struct scsi_qla_host *ha,
669 uint32_t intr_status)
670 {
671 /* Process response queue interrupt. */
672 if (intr_status & HSRX_RISC_IOCB_INT)
673 qla4xxx_process_response_queue(ha);
674
675 /* Process mailbox/asynch event interrupt.*/
676 if (intr_status & HSRX_RISC_MB_INT)
677 qla4xxx_isr_decode_mailbox(ha,
678 readl(&ha->qla4_8xxx_reg->mailbox_out[0]));
679
680 /* clear the interrupt */
681 writel(0, &ha->qla4_8xxx_reg->host_int);
682 readl(&ha->qla4_8xxx_reg->host_int);
683 }
684
685 /**
686 * qla4xxx_interrupt_service_routine - isr
687 * @ha: pointer to host adapter structure.
688 *
689 * This is the main interrupt service routine.
690 * hardware_lock locked upon entry. runs in interrupt context.
691 **/
692 void qla4xxx_interrupt_service_routine(struct scsi_qla_host * ha,
693 uint32_t intr_status)
694 {
695 /* Process response queue interrupt. */
696 if (intr_status & CSR_SCSI_COMPLETION_INTR)
697 qla4xxx_process_response_queue(ha);
698
699 /* Process mailbox/asynch event interrupt.*/
700 if (intr_status & CSR_SCSI_PROCESSOR_INTR) {
701 qla4xxx_isr_decode_mailbox(ha,
702 readl(&ha->reg->mailbox[0]));
703
704 /* Clear Mailbox Interrupt */
705 writel(set_rmask(CSR_SCSI_PROCESSOR_INTR),
706 &ha->reg->ctrl_status);
707 readl(&ha->reg->ctrl_status);
708 }
709 }
710
711 /**
712 * qla4_8xxx_spurious_interrupt - processes spurious interrupt
713 * @ha: pointer to host adapter structure.
714 * @reqs_count: .
715 *
716 **/
717 static void qla4_8xxx_spurious_interrupt(struct scsi_qla_host *ha,
718 uint8_t reqs_count)
719 {
720 if (reqs_count)
721 return;
722
723 DEBUG2(ql4_printk(KERN_INFO, ha, "Spurious Interrupt\n"));
724 if (is_qla8022(ha)) {
725 writel(0, &ha->qla4_8xxx_reg->host_int);
726 if (test_bit(AF_INTx_ENABLED, &ha->flags))
727 qla4_8xxx_wr_32(ha, ha->nx_legacy_intr.tgt_mask_reg,
728 0xfbff);
729 }
730 ha->spurious_int_count++;
731 }
732
733 /**
734 * qla4xxx_intr_handler - hardware interrupt handler.
735 * @irq: Unused
736 * @dev_id: Pointer to host adapter structure
737 **/
738 irqreturn_t qla4xxx_intr_handler(int irq, void *dev_id)
739 {
740 struct scsi_qla_host *ha;
741 uint32_t intr_status;
742 unsigned long flags = 0;
743 uint8_t reqs_count = 0;
744
745 ha = (struct scsi_qla_host *) dev_id;
746 if (!ha) {
747 DEBUG2(printk(KERN_INFO
748 "qla4xxx: Interrupt with NULL host ptr\n"));
749 return IRQ_NONE;
750 }
751
752 spin_lock_irqsave(&ha->hardware_lock, flags);
753
754 ha->isr_count++;
755 /*
756 * Repeatedly service interrupts up to a maximum of
757 * MAX_REQS_SERVICED_PER_INTR
758 */
759 while (1) {
760 /*
761 * Read interrupt status
762 */
763 if (ha->isp_ops->rd_shdw_rsp_q_in(ha) !=
764 ha->response_out)
765 intr_status = CSR_SCSI_COMPLETION_INTR;
766 else
767 intr_status = readl(&ha->reg->ctrl_status);
768
769 if ((intr_status &
770 (CSR_SCSI_RESET_INTR|CSR_FATAL_ERROR|INTR_PENDING)) == 0) {
771 if (reqs_count == 0)
772 ha->spurious_int_count++;
773 break;
774 }
775
776 if (intr_status & CSR_FATAL_ERROR) {
777 DEBUG2(printk(KERN_INFO "scsi%ld: Fatal Error, "
778 "Status 0x%04x\n", ha->host_no,
779 readl(isp_port_error_status (ha))));
780
781 /* Issue Soft Reset to clear this error condition.
782 * This will prevent the RISC from repeatedly
783 * interrupting the driver; thus, allowing the DPC to
784 * get scheduled to continue error recovery.
785 * NOTE: Disabling RISC interrupts does not work in
786 * this case, as CSR_FATAL_ERROR overrides
787 * CSR_SCSI_INTR_ENABLE */
788 if ((readl(&ha->reg->ctrl_status) &
789 CSR_SCSI_RESET_INTR) == 0) {
790 writel(set_rmask(CSR_SOFT_RESET),
791 &ha->reg->ctrl_status);
792 readl(&ha->reg->ctrl_status);
793 }
794
795 writel(set_rmask(CSR_FATAL_ERROR),
796 &ha->reg->ctrl_status);
797 readl(&ha->reg->ctrl_status);
798
799 __qla4xxx_disable_intrs(ha);
800
801 set_bit(DPC_RESET_HA, &ha->dpc_flags);
802
803 break;
804 } else if (intr_status & CSR_SCSI_RESET_INTR) {
805 clear_bit(AF_ONLINE, &ha->flags);
806 __qla4xxx_disable_intrs(ha);
807
808 writel(set_rmask(CSR_SCSI_RESET_INTR),
809 &ha->reg->ctrl_status);
810 readl(&ha->reg->ctrl_status);
811
812 if (!test_bit(AF_HA_REMOVAL, &ha->flags))
813 set_bit(DPC_RESET_HA_INTR, &ha->dpc_flags);
814
815 break;
816 } else if (intr_status & INTR_PENDING) {
817 ha->isp_ops->interrupt_service_routine(ha, intr_status);
818 ha->total_io_count++;
819 if (++reqs_count == MAX_REQS_SERVICED_PER_INTR)
820 break;
821 }
822 }
823
824 spin_unlock_irqrestore(&ha->hardware_lock, flags);
825
826 return IRQ_HANDLED;
827 }
828
829 /**
830 * qla4_8xxx_intr_handler - hardware interrupt handler.
831 * @irq: Unused
832 * @dev_id: Pointer to host adapter structure
833 **/
834 irqreturn_t qla4_8xxx_intr_handler(int irq, void *dev_id)
835 {
836 struct scsi_qla_host *ha = dev_id;
837 uint32_t intr_status;
838 uint32_t status;
839 unsigned long flags = 0;
840 uint8_t reqs_count = 0;
841
842 if (unlikely(pci_channel_offline(ha->pdev)))
843 return IRQ_HANDLED;
844
845 ha->isr_count++;
846 status = qla4_8xxx_rd_32(ha, ISR_INT_VECTOR);
847 if (!(status & ha->nx_legacy_intr.int_vec_bit))
848 return IRQ_NONE;
849
850 status = qla4_8xxx_rd_32(ha, ISR_INT_STATE_REG);
851 if (!ISR_IS_LEGACY_INTR_TRIGGERED(status)) {
852 DEBUG2(ql4_printk(KERN_INFO, ha,
853 "%s legacy Int not triggered\n", __func__));
854 return IRQ_NONE;
855 }
856
857 /* clear the interrupt */
858 qla4_8xxx_wr_32(ha, ha->nx_legacy_intr.tgt_status_reg, 0xffffffff);
859
860 /* read twice to ensure write is flushed */
861 qla4_8xxx_rd_32(ha, ISR_INT_VECTOR);
862 qla4_8xxx_rd_32(ha, ISR_INT_VECTOR);
863
864 spin_lock_irqsave(&ha->hardware_lock, flags);
865 while (1) {
866 if (!(readl(&ha->qla4_8xxx_reg->host_int) &
867 ISRX_82XX_RISC_INT)) {
868 qla4_8xxx_spurious_interrupt(ha, reqs_count);
869 break;
870 }
871 intr_status = readl(&ha->qla4_8xxx_reg->host_status);
872 if ((intr_status &
873 (HSRX_RISC_MB_INT | HSRX_RISC_IOCB_INT)) == 0) {
874 qla4_8xxx_spurious_interrupt(ha, reqs_count);
875 break;
876 }
877
878 ha->isp_ops->interrupt_service_routine(ha, intr_status);
879
880 /* Enable Interrupt */
881 qla4_8xxx_wr_32(ha, ha->nx_legacy_intr.tgt_mask_reg, 0xfbff);
882
883 if (++reqs_count == MAX_REQS_SERVICED_PER_INTR)
884 break;
885 }
886
887 spin_unlock_irqrestore(&ha->hardware_lock, flags);
888 return IRQ_HANDLED;
889 }
890
891 irqreturn_t
892 qla4_8xxx_msi_handler(int irq, void *dev_id)
893 {
894 struct scsi_qla_host *ha;
895
896 ha = (struct scsi_qla_host *) dev_id;
897 if (!ha) {
898 DEBUG2(printk(KERN_INFO
899 "qla4xxx: MSIX: Interrupt with NULL host ptr\n"));
900 return IRQ_NONE;
901 }
902
903 ha->isr_count++;
904 /* clear the interrupt */
905 qla4_8xxx_wr_32(ha, ha->nx_legacy_intr.tgt_status_reg, 0xffffffff);
906
907 /* read twice to ensure write is flushed */
908 qla4_8xxx_rd_32(ha, ISR_INT_VECTOR);
909 qla4_8xxx_rd_32(ha, ISR_INT_VECTOR);
910
911 return qla4_8xxx_default_intr_handler(irq, dev_id);
912 }
913
914 /**
915 * qla4_8xxx_default_intr_handler - hardware interrupt handler.
916 * @irq: Unused
917 * @dev_id: Pointer to host adapter structure
918 *
919 * This interrupt handler is called directly for MSI-X, and
920 * called indirectly for MSI.
921 **/
922 irqreturn_t
923 qla4_8xxx_default_intr_handler(int irq, void *dev_id)
924 {
925 struct scsi_qla_host *ha = dev_id;
926 unsigned long flags;
927 uint32_t intr_status;
928 uint8_t reqs_count = 0;
929
930 spin_lock_irqsave(&ha->hardware_lock, flags);
931 while (1) {
932 if (!(readl(&ha->qla4_8xxx_reg->host_int) &
933 ISRX_82XX_RISC_INT)) {
934 qla4_8xxx_spurious_interrupt(ha, reqs_count);
935 break;
936 }
937
938 intr_status = readl(&ha->qla4_8xxx_reg->host_status);
939 if ((intr_status &
940 (HSRX_RISC_MB_INT | HSRX_RISC_IOCB_INT)) == 0) {
941 qla4_8xxx_spurious_interrupt(ha, reqs_count);
942 break;
943 }
944
945 ha->isp_ops->interrupt_service_routine(ha, intr_status);
946
947 if (++reqs_count == MAX_REQS_SERVICED_PER_INTR)
948 break;
949 }
950
951 ha->isr_count++;
952 spin_unlock_irqrestore(&ha->hardware_lock, flags);
953 return IRQ_HANDLED;
954 }
955
956 irqreturn_t
957 qla4_8xxx_msix_rsp_q(int irq, void *dev_id)
958 {
959 struct scsi_qla_host *ha = dev_id;
960 unsigned long flags;
961
962 spin_lock_irqsave(&ha->hardware_lock, flags);
963 qla4xxx_process_response_queue(ha);
964 writel(0, &ha->qla4_8xxx_reg->host_int);
965 spin_unlock_irqrestore(&ha->hardware_lock, flags);
966
967 ha->isr_count++;
968 return IRQ_HANDLED;
969 }
970
971 /**
972 * qla4xxx_process_aen - processes AENs generated by firmware
973 * @ha: pointer to host adapter structure.
974 * @process_aen: type of AENs to process
975 *
976 * Processes specific types of Asynchronous Events generated by firmware.
977 * The type of AENs to process is specified by process_aen and can be
978 * PROCESS_ALL_AENS 0
979 * FLUSH_DDB_CHANGED_AENS 1
980 * RELOGIN_DDB_CHANGED_AENS 2
981 **/
982 void qla4xxx_process_aen(struct scsi_qla_host * ha, uint8_t process_aen)
983 {
984 uint32_t mbox_sts[MBOX_AEN_REG_COUNT];
985 struct aen *aen;
986 int i;
987 unsigned long flags;
988
989 spin_lock_irqsave(&ha->hardware_lock, flags);
990 while (ha->aen_out != ha->aen_in) {
991 aen = &ha->aen_q[ha->aen_out];
992 /* copy aen information to local structure */
993 for (i = 0; i < MBOX_AEN_REG_COUNT; i++)
994 mbox_sts[i] = aen->mbox_sts[i];
995
996 ha->aen_q_count++;
997 ha->aen_out++;
998
999 if (ha->aen_out == MAX_AEN_ENTRIES)
1000 ha->aen_out = 0;
1001
1002 spin_unlock_irqrestore(&ha->hardware_lock, flags);
1003
1004 DEBUG2(printk("qla4xxx(%ld): AEN[%d]=0x%08x, mbx1=0x%08x mbx2=0x%08x"
1005 " mbx3=0x%08x mbx4=0x%08x\n", ha->host_no,
1006 (ha->aen_out ? (ha->aen_out-1): (MAX_AEN_ENTRIES-1)),
1007 mbox_sts[0], mbox_sts[1], mbox_sts[2],
1008 mbox_sts[3], mbox_sts[4]));
1009
1010 switch (mbox_sts[0]) {
1011 case MBOX_ASTS_DATABASE_CHANGED:
1012 if (process_aen == FLUSH_DDB_CHANGED_AENS) {
1013 DEBUG2(printk("scsi%ld: AEN[%d] %04x, index "
1014 "[%d] state=%04x FLUSHED!\n",
1015 ha->host_no, ha->aen_out,
1016 mbox_sts[0], mbox_sts[2],
1017 mbox_sts[3]));
1018 break;
1019 }
1020 case PROCESS_ALL_AENS:
1021 default:
1022 if (mbox_sts[1] == 0) { /* Global DB change. */
1023 qla4xxx_reinitialize_ddb_list(ha);
1024 } else if (mbox_sts[1] == 1) { /* Specific device. */
1025 qla4xxx_process_ddb_changed(ha, mbox_sts[2],
1026 mbox_sts[3], mbox_sts[4]);
1027 }
1028 break;
1029 }
1030 spin_lock_irqsave(&ha->hardware_lock, flags);
1031 }
1032 spin_unlock_irqrestore(&ha->hardware_lock, flags);
1033 }
1034
1035 int qla4xxx_request_irqs(struct scsi_qla_host *ha)
1036 {
1037 int ret;
1038
1039 if (!is_qla8022(ha))
1040 goto try_intx;
1041
1042 if (ql4xenablemsix == 2)
1043 goto try_msi;
1044
1045 if (ql4xenablemsix == 0 || ql4xenablemsix != 1)
1046 goto try_intx;
1047
1048 /* Trying MSI-X */
1049 ret = qla4_8xxx_enable_msix(ha);
1050 if (!ret) {
1051 DEBUG2(ql4_printk(KERN_INFO, ha,
1052 "MSI-X: Enabled (0x%X).\n", ha->revision_id));
1053 goto irq_attached;
1054 }
1055
1056 ql4_printk(KERN_WARNING, ha,
1057 "MSI-X: Falling back-to MSI mode -- %d.\n", ret);
1058
1059 try_msi:
1060 /* Trying MSI */
1061 ret = pci_enable_msi(ha->pdev);
1062 if (!ret) {
1063 ret = request_irq(ha->pdev->irq, qla4_8xxx_msi_handler,
1064 0, DRIVER_NAME, ha);
1065 if (!ret) {
1066 DEBUG2(ql4_printk(KERN_INFO, ha, "MSI: Enabled.\n"));
1067 set_bit(AF_MSI_ENABLED, &ha->flags);
1068 goto irq_attached;
1069 } else {
1070 ql4_printk(KERN_WARNING, ha,
1071 "MSI: Failed to reserve interrupt %d "
1072 "already in use.\n", ha->pdev->irq);
1073 pci_disable_msi(ha->pdev);
1074 }
1075 }
1076 ql4_printk(KERN_WARNING, ha,
1077 "MSI: Falling back-to INTx mode -- %d.\n", ret);
1078
1079 try_intx:
1080 /* Trying INTx */
1081 ret = request_irq(ha->pdev->irq, ha->isp_ops->intr_handler,
1082 IRQF_SHARED, DRIVER_NAME, ha);
1083 if (!ret) {
1084 DEBUG2(ql4_printk(KERN_INFO, ha, "INTx: Enabled.\n"));
1085 set_bit(AF_INTx_ENABLED, &ha->flags);
1086 goto irq_attached;
1087
1088 } else {
1089 ql4_printk(KERN_WARNING, ha,
1090 "INTx: Failed to reserve interrupt %d already in"
1091 " use.\n", ha->pdev->irq);
1092 return ret;
1093 }
1094
1095 irq_attached:
1096 set_bit(AF_IRQ_ATTACHED, &ha->flags);
1097 ha->host->irq = ha->pdev->irq;
1098 ql4_printk(KERN_INFO, ha, "%s: irq %d attached\n",
1099 __func__, ha->pdev->irq);
1100 return ret;
1101 }
1102
1103 void qla4xxx_free_irqs(struct scsi_qla_host *ha)
1104 {
1105 if (test_bit(AF_MSIX_ENABLED, &ha->flags))
1106 qla4_8xxx_disable_msix(ha);
1107 else if (test_and_clear_bit(AF_MSI_ENABLED, &ha->flags)) {
1108 free_irq(ha->pdev->irq, ha);
1109 pci_disable_msi(ha->pdev);
1110 } else if (test_and_clear_bit(AF_INTx_ENABLED, &ha->flags))
1111 free_irq(ha->pdev->irq, ha);
1112 }
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree