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authorDavid Somayajulu <david.somayajulu@qlogic.com>2006-09-19 13:28:00 -0400
committerJames Bottomley <jejb@mulgrave.il.steeleye.com>2006-10-04 14:34:04 -0400
commitafaf5a2d341d33b66b47c2716a263ce593460a08 (patch)
tree70aeac2f11cc644114eead55fa003be8288666f0 /drivers/scsi/qla4xxx/ql4_isr.c
parented542bed126caeefc6546b276e4af852d4d34f33 (diff)
[SCSI] Initial Commit of qla4xxx
open-iSCSI driver for Qlogic Corporation's iSCSI HBAs Signed-off-by: Ravi Anand <ravi.anand@qlogic.com> Signed-off-by: David Somayajulu <david.somayajulu@qlogic.com> Signed-off-by: Doug Maxey <dwm@bubba.enoyolf.org> Signed-off-by: Mike Christie <michaelc@cs.wisc.edu> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
Diffstat (limited to 'drivers/scsi/qla4xxx/ql4_isr.c')
-rw-r--r--drivers/scsi/qla4xxx/ql4_isr.c797
1 files changed, 797 insertions, 0 deletions
diff --git a/drivers/scsi/qla4xxx/ql4_isr.c b/drivers/scsi/qla4xxx/ql4_isr.c
new file mode 100644
index 000000000000..b584317608d1
--- /dev/null
+++ b/drivers/scsi/qla4xxx/ql4_isr.c
@@ -0,0 +1,797 @@
1/*
2 * QLogic iSCSI HBA Driver
3 * Copyright (c) 2003-2006 QLogic Corporation
4 *
5 * See LICENSE.qla4xxx for copyright and licensing details.
6 */
7
8#include "ql4_def.h"
9
10/**
11 * qla2x00_process_completed_request() - Process a Fast Post response.
12 * @ha: SCSI driver HA context
13 * @index: SRB index
14 **/
15static void qla4xxx_process_completed_request(struct scsi_qla_host *ha,
16 uint32_t index)
17{
18 struct srb *srb;
19
20 srb = qla4xxx_del_from_active_array(ha, index);
21 if (srb) {
22 /* Save ISP completion status */
23 srb->cmd->result = DID_OK << 16;
24 qla4xxx_srb_compl(ha, srb);
25 } else {
26 DEBUG2(printk("scsi%ld: Invalid ISP SCSI completion handle = "
27 "%d\n", ha->host_no, index));
28 set_bit(DPC_RESET_HA, &ha->dpc_flags);
29 }
30}
31
32/**
33 * qla4xxx_status_entry - processes status IOCBs
34 * @ha: Pointer to host adapter structure.
35 * @sts_entry: Pointer to status entry structure.
36 **/
37static void qla4xxx_status_entry(struct scsi_qla_host *ha,
38 struct status_entry *sts_entry)
39{
40 uint8_t scsi_status;
41 struct scsi_cmnd *cmd;
42 struct srb *srb;
43 struct ddb_entry *ddb_entry;
44 uint32_t residual;
45 uint16_t sensebytecnt;
46
47 if (sts_entry->completionStatus == SCS_COMPLETE &&
48 sts_entry->scsiStatus == 0) {
49 qla4xxx_process_completed_request(ha,
50 le32_to_cpu(sts_entry->
51 handle));
52 return;
53 }
54
55 srb = qla4xxx_del_from_active_array(ha, le32_to_cpu(sts_entry->handle));
56 if (!srb) {
57 /* FIXMEdg: Don't we need to reset ISP in this case??? */
58 DEBUG2(printk(KERN_WARNING "scsi%ld: %s: Status Entry invalid "
59 "handle 0x%x, sp=%p. This cmd may have already "
60 "been completed.\n", ha->host_no, __func__,
61 le32_to_cpu(sts_entry->handle), srb));
62 return;
63 }
64
65 cmd = srb->cmd;
66 if (cmd == NULL) {
67 DEBUG2(printk("scsi%ld: %s: Command already returned back to "
68 "OS pkt->handle=%d srb=%p srb->state:%d\n",
69 ha->host_no, __func__, sts_entry->handle,
70 srb, srb->state));
71 dev_warn(&ha->pdev->dev, "Command is NULL:"
72 " already returned to OS (srb=%p)\n", srb);
73 return;
74 }
75
76 ddb_entry = srb->ddb;
77 if (ddb_entry == NULL) {
78 cmd->result = DID_NO_CONNECT << 16;
79 goto status_entry_exit;
80 }
81
82 residual = le32_to_cpu(sts_entry->residualByteCnt);
83
84 /* Translate ISP error to a Linux SCSI error. */
85 scsi_status = sts_entry->scsiStatus;
86 switch (sts_entry->completionStatus) {
87 case SCS_COMPLETE:
88 if (scsi_status == 0) {
89 cmd->result = DID_OK << 16;
90 break;
91 }
92
93 if (sts_entry->iscsiFlags &
94 (ISCSI_FLAG_RESIDUAL_OVER|ISCSI_FLAG_RESIDUAL_UNDER))
95 cmd->resid = residual;
96
97 cmd->result = DID_OK << 16 | scsi_status;
98
99 if (scsi_status != SCSI_CHECK_CONDITION)
100 break;
101
102 /* Copy Sense Data into sense buffer. */
103 memset(cmd->sense_buffer, 0, sizeof(cmd->sense_buffer));
104
105 sensebytecnt = le16_to_cpu(sts_entry->senseDataByteCnt);
106 if (sensebytecnt == 0)
107 break;
108
109 memcpy(cmd->sense_buffer, sts_entry->senseData,
110 min(sensebytecnt,
111 (uint16_t) sizeof(cmd->sense_buffer)));
112
113 DEBUG2(printk("scsi%ld:%d:%d:%d: %s: sense key = %x, "
114 "ASC/ASCQ = %02x/%02x\n", ha->host_no,
115 cmd->device->channel, cmd->device->id,
116 cmd->device->lun, __func__,
117 sts_entry->senseData[2] & 0x0f,
118 sts_entry->senseData[12],
119 sts_entry->senseData[13]));
120
121 srb->flags |= SRB_GOT_SENSE;
122 break;
123
124 case SCS_INCOMPLETE:
125 /* Always set the status to DID_ERROR, since
126 * all conditions result in that status anyway */
127 cmd->result = DID_ERROR << 16;
128 break;
129
130 case SCS_RESET_OCCURRED:
131 DEBUG2(printk("scsi%ld:%d:%d:%d: %s: Device RESET occurred\n",
132 ha->host_no, cmd->device->channel,
133 cmd->device->id, cmd->device->lun, __func__));
134
135 cmd->result = DID_RESET << 16;
136 break;
137
138 case SCS_ABORTED:
139 DEBUG2(printk("scsi%ld:%d:%d:%d: %s: Abort occurred\n",
140 ha->host_no, cmd->device->channel,
141 cmd->device->id, cmd->device->lun, __func__));
142
143 cmd->result = DID_RESET << 16;
144 break;
145
146 case SCS_TIMEOUT:
147 DEBUG2(printk(KERN_INFO "scsi%ld:%d:%d:%d: Timeout\n",
148 ha->host_no, cmd->device->channel,
149 cmd->device->id, cmd->device->lun));
150
151 cmd->result = DID_BUS_BUSY << 16;
152
153 /*
154 * Mark device missing so that we won't continue to send
155 * I/O to this device. We should get a ddb state change
156 * AEN soon.
157 */
158 if (atomic_read(&ddb_entry->state) == DDB_STATE_ONLINE)
159 qla4xxx_mark_device_missing(ha, ddb_entry);
160 break;
161
162 case SCS_DATA_UNDERRUN:
163 case SCS_DATA_OVERRUN:
164 if (sts_entry->iscsiFlags & ISCSI_FLAG_RESIDUAL_OVER) {
165 DEBUG2(printk("scsi%ld:%d:%d:%d: %s: " "Data overrun, "
166 "residual = 0x%x\n", ha->host_no,
167 cmd->device->channel, cmd->device->id,
168 cmd->device->lun, __func__, residual));
169
170 cmd->result = DID_ERROR << 16;
171 break;
172 }
173
174 if ((sts_entry->iscsiFlags & ISCSI_FLAG_RESIDUAL_UNDER) == 0) {
175 /*
176 * Firmware detected a SCSI transport underrun
177 * condition
178 */
179 cmd->resid = residual;
180 DEBUG2(printk("scsi%ld:%d:%d:%d: %s: UNDERRUN status "
181 "detected, xferlen = 0x%x, residual = "
182 "0x%x\n",
183 ha->host_no, cmd->device->channel,
184 cmd->device->id,
185 cmd->device->lun, __func__,
186 cmd->request_bufflen,
187 residual));
188 }
189
190 /*
191 * If there is scsi_status, it takes precedense over
192 * underflow condition.
193 */
194 if (scsi_status != 0) {
195 cmd->result = DID_OK << 16 | scsi_status;
196
197 if (scsi_status != SCSI_CHECK_CONDITION)
198 break;
199
200 /* Copy Sense Data into sense buffer. */
201 memset(cmd->sense_buffer, 0,
202 sizeof(cmd->sense_buffer));
203
204 sensebytecnt =
205 le16_to_cpu(sts_entry->senseDataByteCnt);
206 if (sensebytecnt == 0)
207 break;
208
209 memcpy(cmd->sense_buffer, sts_entry->senseData,
210 min(sensebytecnt,
211 (uint16_t) sizeof(cmd->sense_buffer)));
212
213 DEBUG2(printk("scsi%ld:%d:%d:%d: %s: sense key = %x, "
214 "ASC/ASCQ = %02x/%02x\n", ha->host_no,
215 cmd->device->channel, cmd->device->id,
216 cmd->device->lun, __func__,
217 sts_entry->senseData[2] & 0x0f,
218 sts_entry->senseData[12],
219 sts_entry->senseData[13]));
220 } else {
221 /*
222 * If RISC reports underrun and target does not
223 * report it then we must have a lost frame, so
224 * tell upper layer to retry it by reporting a
225 * bus busy.
226 */
227 if ((sts_entry->iscsiFlags &
228 ISCSI_FLAG_RESIDUAL_UNDER) == 0) {
229 cmd->result = DID_BUS_BUSY << 16;
230 } else if ((cmd->request_bufflen - residual) <
231 cmd->underflow) {
232 /*
233 * Handle mid-layer underflow???
234 *
235 * For kernels less than 2.4, the driver must
236 * return an error if an underflow is detected.
237 * For kernels equal-to and above 2.4, the
238 * mid-layer will appearantly handle the
239 * underflow by detecting the residual count --
240 * unfortunately, we do not see where this is
241 * actually being done. In the interim, we
242 * will return DID_ERROR.
243 */
244 DEBUG2(printk("scsi%ld:%d:%d:%d: %s: "
245 "Mid-layer Data underrun, "
246 "xferlen = 0x%x, "
247 "residual = 0x%x\n", ha->host_no,
248 cmd->device->channel,
249 cmd->device->id,
250 cmd->device->lun, __func__,
251 cmd->request_bufflen, residual));
252
253 cmd->result = DID_ERROR << 16;
254 } else {
255 cmd->result = DID_OK << 16;
256 }
257 }
258 break;
259
260 case SCS_DEVICE_LOGGED_OUT:
261 case SCS_DEVICE_UNAVAILABLE:
262 /*
263 * Mark device missing so that we won't continue to
264 * send I/O to this device. We should get a ddb
265 * state change AEN soon.
266 */
267 if (atomic_read(&ddb_entry->state) == DDB_STATE_ONLINE)
268 qla4xxx_mark_device_missing(ha, ddb_entry);
269
270 cmd->result = DID_BUS_BUSY << 16;
271 break;
272
273 case SCS_QUEUE_FULL:
274 /*
275 * SCSI Mid-Layer handles device queue full
276 */
277 cmd->result = DID_OK << 16 | sts_entry->scsiStatus;
278 DEBUG2(printk("scsi%ld:%d:%d: %s: QUEUE FULL detected "
279 "compl=%02x, scsi=%02x, state=%02x, iFlags=%02x,"
280 " iResp=%02x\n", ha->host_no, cmd->device->id,
281 cmd->device->lun, __func__,
282 sts_entry->completionStatus,
283 sts_entry->scsiStatus, sts_entry->state_flags,
284 sts_entry->iscsiFlags,
285 sts_entry->iscsiResponse));
286 break;
287
288 default:
289 cmd->result = DID_ERROR << 16;
290 break;
291 }
292
293status_entry_exit:
294
295 /* complete the request */
296 srb->cc_stat = sts_entry->completionStatus;
297 qla4xxx_srb_compl(ha, srb);
298}
299
300/**
301 * qla4xxx_process_response_queue - process response queue completions
302 * @ha: Pointer to host adapter structure.
303 *
304 * This routine process response queue completions in interrupt context.
305 * Hardware_lock locked upon entry
306 **/
307static void qla4xxx_process_response_queue(struct scsi_qla_host * ha)
308{
309 uint32_t count = 0;
310 struct srb *srb = NULL;
311 struct status_entry *sts_entry;
312
313 /* Process all responses from response queue */
314 while ((ha->response_in =
315 (uint16_t)le32_to_cpu(ha->shadow_regs->rsp_q_in)) !=
316 ha->response_out) {
317 sts_entry = (struct status_entry *) ha->response_ptr;
318 count++;
319
320 /* Advance pointers for next entry */
321 if (ha->response_out == (RESPONSE_QUEUE_DEPTH - 1)) {
322 ha->response_out = 0;
323 ha->response_ptr = ha->response_ring;
324 } else {
325 ha->response_out++;
326 ha->response_ptr++;
327 }
328
329 /* process entry */
330 switch (sts_entry->hdr.entryType) {
331 case ET_STATUS:
332 /*
333 * Common status - Single completion posted in single
334 * IOSB.
335 */
336 qla4xxx_status_entry(ha, sts_entry);
337 break;
338
339 case ET_PASSTHRU_STATUS:
340 break;
341
342 case ET_STATUS_CONTINUATION:
343 /* Just throw away the status continuation entries */
344 DEBUG2(printk("scsi%ld: %s: Status Continuation entry "
345 "- ignoring\n", ha->host_no, __func__));
346 break;
347
348 case ET_COMMAND:
349 /* ISP device queue is full. Command not
350 * accepted by ISP. Queue command for
351 * later */
352
353 srb = qla4xxx_del_from_active_array(ha,
354 le32_to_cpu(sts_entry->
355 handle));
356 if (srb == NULL)
357 goto exit_prq_invalid_handle;
358
359 DEBUG2(printk("scsi%ld: %s: FW device queue full, "
360 "srb %p\n", ha->host_no, __func__, srb));
361
362 /* ETRY normally by sending it back with
363 * DID_BUS_BUSY */
364 srb->cmd->result = DID_BUS_BUSY << 16;
365 qla4xxx_srb_compl(ha, srb);
366 break;
367
368 case ET_CONTINUE:
369 /* Just throw away the continuation entries */
370 DEBUG2(printk("scsi%ld: %s: Continuation entry - "
371 "ignoring\n", ha->host_no, __func__));
372 break;
373
374 default:
375 /*
376 * Invalid entry in response queue, reset RISC
377 * firmware.
378 */
379 DEBUG2(printk("scsi%ld: %s: Invalid entry %x in "
380 "response queue \n", ha->host_no,
381 __func__,
382 sts_entry->hdr.entryType));
383 goto exit_prq_error;
384 }
385 }
386
387 /*
388 * Done with responses, update the ISP For QLA4010, this also clears
389 * the interrupt.
390 */
391 writel(ha->response_out, &ha->reg->rsp_q_out);
392 readl(&ha->reg->rsp_q_out);
393
394 return;
395
396exit_prq_invalid_handle:
397 DEBUG2(printk("scsi%ld: %s: Invalid handle(srb)=%p type=%x IOCS=%x\n",
398 ha->host_no, __func__, srb, sts_entry->hdr.entryType,
399 sts_entry->completionStatus));
400
401exit_prq_error:
402 writel(ha->response_out, &ha->reg->rsp_q_out);
403 readl(&ha->reg->rsp_q_out);
404
405 set_bit(DPC_RESET_HA, &ha->dpc_flags);
406}
407
408/**
409 * qla4xxx_isr_decode_mailbox - decodes mailbox status
410 * @ha: Pointer to host adapter structure.
411 * @mailbox_status: Mailbox status.
412 *
413 * This routine decodes the mailbox status during the ISR.
414 * Hardware_lock locked upon entry. runs in interrupt context.
415 **/
416static void qla4xxx_isr_decode_mailbox(struct scsi_qla_host * ha,
417 uint32_t mbox_status)
418{
419 int i;
420
421 if ((mbox_status == MBOX_STS_BUSY) ||
422 (mbox_status == MBOX_STS_INTERMEDIATE_COMPLETION) ||
423 (mbox_status >> 12 == MBOX_COMPLETION_STATUS)) {
424 ha->mbox_status[0] = mbox_status;
425
426 if (test_bit(AF_MBOX_COMMAND, &ha->flags)) {
427 /*
428 * Copy all mailbox registers to a temporary
429 * location and set mailbox command done flag
430 */
431 for (i = 1; i < ha->mbox_status_count; i++)
432 ha->mbox_status[i] =
433 readl(&ha->reg->mailbox[i]);
434
435 set_bit(AF_MBOX_COMMAND_DONE, &ha->flags);
436 wake_up(&ha->mailbox_wait_queue);
437 }
438 } else if (mbox_status >> 12 == MBOX_ASYNC_EVENT_STATUS) {
439 /* Immediately process the AENs that don't require much work.
440 * Only queue the database_changed AENs */
441 switch (mbox_status) {
442 case MBOX_ASTS_SYSTEM_ERROR:
443 /* Log Mailbox registers */
444 if (ql4xdontresethba) {
445 DEBUG2(printk("%s:Dont Reset HBA\n",
446 __func__));
447 } else {
448 set_bit(AF_GET_CRASH_RECORD, &ha->flags);
449 set_bit(DPC_RESET_HA, &ha->dpc_flags);
450 }
451 break;
452
453 case MBOX_ASTS_REQUEST_TRANSFER_ERROR:
454 case MBOX_ASTS_RESPONSE_TRANSFER_ERROR:
455 case MBOX_ASTS_NVRAM_INVALID:
456 case MBOX_ASTS_IP_ADDRESS_CHANGED:
457 case MBOX_ASTS_DHCP_LEASE_EXPIRED:
458 DEBUG2(printk("scsi%ld: AEN %04x, ERROR Status, "
459 "Reset HA\n", ha->host_no, mbox_status));
460 set_bit(DPC_RESET_HA, &ha->dpc_flags);
461 break;
462
463 case MBOX_ASTS_LINK_UP:
464 DEBUG2(printk("scsi%ld: AEN %04x Adapter LINK UP\n",
465 ha->host_no, mbox_status));
466 set_bit(AF_LINK_UP, &ha->flags);
467 break;
468
469 case MBOX_ASTS_LINK_DOWN:
470 DEBUG2(printk("scsi%ld: AEN %04x Adapter LINK DOWN\n",
471 ha->host_no, mbox_status));
472 clear_bit(AF_LINK_UP, &ha->flags);
473 break;
474
475 case MBOX_ASTS_HEARTBEAT:
476 ha->seconds_since_last_heartbeat = 0;
477 break;
478
479 case MBOX_ASTS_DHCP_LEASE_ACQUIRED:
480 DEBUG2(printk("scsi%ld: AEN %04x DHCP LEASE "
481 "ACQUIRED\n", ha->host_no, mbox_status));
482 set_bit(DPC_GET_DHCP_IP_ADDR, &ha->dpc_flags);
483 break;
484
485 case MBOX_ASTS_PROTOCOL_STATISTIC_ALARM:
486 case MBOX_ASTS_SCSI_COMMAND_PDU_REJECTED: /* Target
487 * mode
488 * only */
489 case MBOX_ASTS_UNSOLICITED_PDU_RECEIVED: /* Connection mode */
490 case MBOX_ASTS_IPSEC_SYSTEM_FATAL_ERROR:
491 case MBOX_ASTS_SUBNET_STATE_CHANGE:
492 /* No action */
493 DEBUG2(printk("scsi%ld: AEN %04x\n", ha->host_no,
494 mbox_status));
495 break;
496
497 case MBOX_ASTS_MAC_ADDRESS_CHANGED:
498 case MBOX_ASTS_DNS:
499 /* No action */
500 DEBUG2(printk(KERN_INFO "scsi%ld: AEN %04x, "
501 "mbox_sts[1]=%04x, mbox_sts[2]=%04x\n",
502 ha->host_no, mbox_status,
503 readl(&ha->reg->mailbox[1]),
504 readl(&ha->reg->mailbox[2])));
505 break;
506
507 case MBOX_ASTS_SELF_TEST_FAILED:
508 case MBOX_ASTS_LOGIN_FAILED:
509 /* No action */
510 DEBUG2(printk("scsi%ld: AEN %04x, mbox_sts[1]=%04x, "
511 "mbox_sts[2]=%04x, mbox_sts[3]=%04x\n",
512 ha->host_no, mbox_status,
513 readl(&ha->reg->mailbox[1]),
514 readl(&ha->reg->mailbox[2]),
515 readl(&ha->reg->mailbox[3])));
516 break;
517
518 case MBOX_ASTS_DATABASE_CHANGED:
519 /* Queue AEN information and process it in the DPC
520 * routine */
521 if (ha->aen_q_count > 0) {
522 /* advance pointer */
523 if (ha->aen_in == (MAX_AEN_ENTRIES - 1))
524 ha->aen_in = 0;
525 else
526 ha->aen_in++;
527
528 /* decrement available counter */
529 ha->aen_q_count--;
530
531 for (i = 1; i < MBOX_AEN_REG_COUNT; i++)
532 ha->aen_q[ha->aen_in].mbox_sts[i] =
533 readl(&ha->reg->mailbox[i]);
534
535 ha->aen_q[ha->aen_in].mbox_sts[0] = mbox_status;
536
537 /* print debug message */
538 DEBUG2(printk("scsi%ld: AEN[%d] %04x queued"
539 " mb1:0x%x mb2:0x%x mb3:0x%x mb4:0x%x\n",
540 ha->host_no, ha->aen_in,
541 mbox_status,
542 ha->aen_q[ha->aen_in].mbox_sts[1],
543 ha->aen_q[ha->aen_in].mbox_sts[2],
544 ha->aen_q[ha->aen_in].mbox_sts[3],
545 ha->aen_q[ha->aen_in]. mbox_sts[4]));
546
547 /* The DPC routine will process the aen */
548 set_bit(DPC_AEN, &ha->dpc_flags);
549 } else {
550 DEBUG2(printk("scsi%ld: %s: aen %04x, queue "
551 "overflowed! AEN LOST!!\n",
552 ha->host_no, __func__,
553 mbox_status));
554
555 DEBUG2(printk("scsi%ld: DUMP AEN QUEUE\n",
556 ha->host_no));
557
558 for (i = 0; i < MAX_AEN_ENTRIES; i++) {
559 DEBUG2(printk("AEN[%d] %04x %04x %04x "
560 "%04x\n", i,
561 ha->aen_q[i].mbox_sts[0],
562 ha->aen_q[i].mbox_sts[1],
563 ha->aen_q[i].mbox_sts[2],
564 ha->aen_q[i].mbox_sts[3]));
565 }
566 }
567 break;
568
569 default:
570 DEBUG2(printk(KERN_WARNING
571 "scsi%ld: AEN %04x UNKNOWN\n",
572 ha->host_no, mbox_status));
573 break;
574 }
575 } else {
576 DEBUG2(printk("scsi%ld: Unknown mailbox status %08X\n",
577 ha->host_no, mbox_status));
578
579 ha->mbox_status[0] = mbox_status;
580 }
581}
582
583/**
584 * qla4xxx_interrupt_service_routine - isr
585 * @ha: pointer to host adapter structure.
586 *
587 * This is the main interrupt service routine.
588 * hardware_lock locked upon entry. runs in interrupt context.
589 **/
590void qla4xxx_interrupt_service_routine(struct scsi_qla_host * ha,
591 uint32_t intr_status)
592{
593 /* Process response queue interrupt. */
594 if (intr_status & CSR_SCSI_COMPLETION_INTR)
595 qla4xxx_process_response_queue(ha);
596
597 /* Process mailbox/asynch event interrupt.*/
598 if (intr_status & CSR_SCSI_PROCESSOR_INTR) {
599 qla4xxx_isr_decode_mailbox(ha,
600 readl(&ha->reg->mailbox[0]));
601
602 /* Clear Mailbox Interrupt */
603 writel(set_rmask(CSR_SCSI_PROCESSOR_INTR),
604 &ha->reg->ctrl_status);
605 readl(&ha->reg->ctrl_status);
606 }
607}
608
609/**
610 * qla4xxx_intr_handler - hardware interrupt handler.
611 * @irq: Unused
612 * @dev_id: Pointer to host adapter structure
613 * @regs: Unused
614 **/
615irqreturn_t qla4xxx_intr_handler(int irq, void *dev_id, struct pt_regs *regs)
616{
617 struct scsi_qla_host *ha;
618 uint32_t intr_status;
619 unsigned long flags = 0;
620 uint8_t reqs_count = 0;
621
622 ha = (struct scsi_qla_host *) dev_id;
623 if (!ha) {
624 DEBUG2(printk(KERN_INFO
625 "qla4xxx: Interrupt with NULL host ptr\n"));
626 return IRQ_NONE;
627 }
628
629 spin_lock_irqsave(&ha->hardware_lock, flags);
630
631 /*
632 * Repeatedly service interrupts up to a maximum of
633 * MAX_REQS_SERVICED_PER_INTR
634 */
635 while (1) {
636 /*
637 * Read interrupt status
638 */
639 if (le32_to_cpu(ha->shadow_regs->rsp_q_in) !=
640 ha->response_out)
641 intr_status = CSR_SCSI_COMPLETION_INTR;
642 else
643 intr_status = readl(&ha->reg->ctrl_status);
644
645 if ((intr_status &
646 (CSR_SCSI_RESET_INTR|CSR_FATAL_ERROR|INTR_PENDING)) ==
647 0) {
648 if (reqs_count == 0)
649 ha->spurious_int_count++;
650 break;
651 }
652
653 if (intr_status & CSR_FATAL_ERROR) {
654 DEBUG2(printk(KERN_INFO "scsi%ld: Fatal Error, "
655 "Status 0x%04x\n", ha->host_no,
656 readl(isp_port_error_status (ha))));
657
658 /* Issue Soft Reset to clear this error condition.
659 * This will prevent the RISC from repeatedly
660 * interrupting the driver; thus, allowing the DPC to
661 * get scheduled to continue error recovery.
662 * NOTE: Disabling RISC interrupts does not work in
663 * this case, as CSR_FATAL_ERROR overrides
664 * CSR_SCSI_INTR_ENABLE */
665 if ((readl(&ha->reg->ctrl_status) &
666 CSR_SCSI_RESET_INTR) == 0) {
667 writel(set_rmask(CSR_SOFT_RESET),
668 &ha->reg->ctrl_status);
669 readl(&ha->reg->ctrl_status);
670 }
671
672 writel(set_rmask(CSR_FATAL_ERROR),
673 &ha->reg->ctrl_status);
674 readl(&ha->reg->ctrl_status);
675
676 __qla4xxx_disable_intrs(ha);
677
678 set_bit(DPC_RESET_HA, &ha->dpc_flags);
679
680 break;
681 } else if (intr_status & CSR_SCSI_RESET_INTR) {
682 clear_bit(AF_ONLINE, &ha->flags);
683 __qla4xxx_disable_intrs(ha);
684
685 writel(set_rmask(CSR_SCSI_RESET_INTR),
686 &ha->reg->ctrl_status);
687 readl(&ha->reg->ctrl_status);
688
689 set_bit(DPC_RESET_HA_INTR, &ha->dpc_flags);
690
691 break;
692 } else if (intr_status & INTR_PENDING) {
693 qla4xxx_interrupt_service_routine(ha, intr_status);
694 ha->total_io_count++;
695 if (++reqs_count == MAX_REQS_SERVICED_PER_INTR)
696 break;
697
698 intr_status = 0;
699 }
700 }
701
702 spin_unlock_irqrestore(&ha->hardware_lock, flags);
703
704 return IRQ_HANDLED;
705}
706
707/**
708 * qla4xxx_process_aen - processes AENs generated by firmware
709 * @ha: pointer to host adapter structure.
710 * @process_aen: type of AENs to process
711 *
712 * Processes specific types of Asynchronous Events generated by firmware.
713 * The type of AENs to process is specified by process_aen and can be
714 * PROCESS_ALL_AENS 0
715 * FLUSH_DDB_CHANGED_AENS 1
716 * RELOGIN_DDB_CHANGED_AENS 2
717 **/
718void qla4xxx_process_aen(struct scsi_qla_host * ha, uint8_t process_aen)
719{
720 uint32_t mbox_sts[MBOX_AEN_REG_COUNT];
721 struct aen *aen;
722 int i;
723 unsigned long flags;
724
725 spin_lock_irqsave(&ha->hardware_lock, flags);
726 while (ha->aen_out != ha->aen_in) {
727 /* Advance pointers for next entry */
728 if (ha->aen_out == (MAX_AEN_ENTRIES - 1))
729 ha->aen_out = 0;
730 else
731 ha->aen_out++;
732
733 ha->aen_q_count++;
734 aen = &ha->aen_q[ha->aen_out];
735
736 /* copy aen information to local structure */
737 for (i = 0; i < MBOX_AEN_REG_COUNT; i++)
738 mbox_sts[i] = aen->mbox_sts[i];
739
740 spin_unlock_irqrestore(&ha->hardware_lock, flags);
741
742 DEBUG(printk("scsi%ld: AEN[%d] %04x, index [%d] state=%04x "
743 "mod=%x conerr=%08x \n", ha->host_no, ha->aen_out,
744 mbox_sts[0], mbox_sts[2], mbox_sts[3],
745 mbox_sts[1], mbox_sts[4]));
746
747 switch (mbox_sts[0]) {
748 case MBOX_ASTS_DATABASE_CHANGED:
749 if (process_aen == FLUSH_DDB_CHANGED_AENS) {
750 DEBUG2(printk("scsi%ld: AEN[%d] %04x, index "
751 "[%d] state=%04x FLUSHED!\n",
752 ha->host_no, ha->aen_out,
753 mbox_sts[0], mbox_sts[2],
754 mbox_sts[3]));
755 break;
756 } else if (process_aen == RELOGIN_DDB_CHANGED_AENS) {
757 /* for use during init time, we only want to
758 * relogin non-active ddbs */
759 struct ddb_entry *ddb_entry;
760
761 ddb_entry =
762 /* FIXME: name length? */
763 qla4xxx_lookup_ddb_by_fw_index(ha,
764 mbox_sts[2]);
765 if (!ddb_entry)
766 break;
767
768 ddb_entry->dev_scan_wait_to_complete_relogin =
769 0;
770 ddb_entry->dev_scan_wait_to_start_relogin =
771 jiffies +
772 ((ddb_entry->default_time2wait +
773 4) * HZ);
774
775 DEBUG2(printk("scsi%ld: ddb index [%d] initate"
776 " RELOGIN after %d seconds\n",
777 ha->host_no,
778 ddb_entry->fw_ddb_index,
779 ddb_entry->default_time2wait +
780 4));
781 break;
782 }
783
784 if (mbox_sts[1] == 0) { /* Global DB change. */
785 qla4xxx_reinitialize_ddb_list(ha);
786 } else if (mbox_sts[1] == 1) { /* Specific device. */
787 qla4xxx_process_ddb_changed(ha, mbox_sts[2],
788 mbox_sts[3]);
789 }
790 break;
791 }
792 spin_lock_irqsave(&ha->hardware_lock, flags);
793 }
794 spin_unlock_irqrestore(&ha->hardware_lock, flags);
795
796}
797
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-28 03:58:02 -0500