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[SCSI] qla4xxx: Properly handle SCSI underrun while processing status IOCBs.
[deliverable/linux.git] / drivers / scsi / qla4xxx / ql4_isr.c
CommitLineData
afaf5a2d
DS		 1/*
2 * QLogic iSCSI HBA Driver
7d01d069 3 * Copyright (c) 2003-2010 QLogic Corporation
afaf5a2d
DS		 4 *
5 * See LICENSE.qla4xxx for copyright and licensing details.
6 */
7
8#include "ql4_def.h"
401425b1
DS		 9#include "ql4_glbl.h"
10#include "ql4_dbg.h"
11#include "ql4_inline.h"
afaf5a2d 12
94bced3c
KH		 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 **/
19static 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);
6d78bd56
PM		 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;
94bced3c 34 return;
6d78bd56 35 }
94bced3c
KH		 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 */
74static void
75qla4xxx_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;
735e4154 80 uint16_t sense_len;
94bced3c
KH		 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) {
09a0f719 105 kref_put(&srb->srb_ref, qla4xxx_srb_compl);
94bced3c
KH		 106 ha->status_srb = NULL;
107 }
108}
109
afaf5a2d
DS		 110/**
111 * qla4xxx_status_entry - processes status IOCBs
112 * @ha: Pointer to host adapter structure.
113 * @sts_entry: Pointer to status entry structure.
114 **/
115static 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;
afaf5a2d 123
afaf5a2d
DS		 124 srb = qla4xxx_del_from_active_array(ha, le32_to_cpu(sts_entry->handle));
125 if (!srb) {
4c6a794d
VC		 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_qla8022(ha))
130 set_bit(DPC_RESET_HA_FW_CONTEXT, &ha->dpc_flags);
131 else
132 set_bit(DPC_RESET_HA, &ha->dpc_flags);
afaf5a2d
DS		 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));
c2660df3
VC		 142 ql4_printk(KERN_WARNING, ha, "Command is NULL:"
143 " already returned to OS (srb=%p)\n", srb);
afaf5a2d
DS		 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:
afaf5a2d 159
6ea7e33e
DS		 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) {
5f7186c8 166 scsi_set_resid(cmd, residual);
9d562913
DS		 167 if (!scsi_status && ((scsi_bufflen(cmd) - residual) <
168 cmd->underflow)) {
6ea7e33e
DS		 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 }
afaf5a2d
DS		 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. */
94bced3c 190 qla4xxx_copy_sense(ha, sts_entry, srb);
afaf5a2d
DS		 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
56d7fcfa 220 cmd->result = DID_TRANSPORT_DISRUPTED << 16;
afaf5a2d
DS		 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 */
b3a271a9
MR		 227 if (iscsi_is_session_online(ddb_entry->sess))
228 qla4xxx_mark_device_missing(ddb_entry->sess);
afaf5a2d
DS		 229 break;
230
231 case SCS_DATA_UNDERRUN:
232 case SCS_DATA_OVERRUN:
6ea7e33e 233 if ((sts_entry->iscsiFlags & ISCSI_FLAG_RESIDUAL_OVER) ||
b06fc73a
MC		 234 (sts_entry->completionStatus == SCS_DATA_OVERRUN)) {
235 DEBUG2(printk("scsi%ld:%d:%d:%d: %s: " "Data overrun\n",
236 ha->host_no,
afaf5a2d 237 cmd->device->channel, cmd->device->id,
b06fc73a 238 cmd->device->lun, __func__));
afaf5a2d
DS		 239
240 cmd->result = DID_ERROR << 16;
241 break;
242 }
243
6ea7e33e 244 scsi_set_resid(cmd, residual);
afaf5a2d 245
24c14200
LC		 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));
afaf5a2d 269
24c14200 270 cmd->result = DID_ERROR << 16;
afaf5a2d 271 break;
24c14200
LC		 272 }
273
274 } else if (scsi_status != SAM_STAT_TASK_SET_FULL &&
275 scsi_status != SAM_STAT_BUSY) {
afaf5a2d 276
afaf5a2d 277 /*
24c14200
LC		 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.
afaf5a2d 291 */
afaf5a2d 292
24c14200
LC		 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;
afaf5a2d 304 }
24c14200
LC		 305
306 cmd->result = DID_OK << 16 | scsi_status;
307
308check_scsi_status:
309 if (scsi_status == SAM_STAT_CHECK_CONDITION)
310 qla4xxx_copy_sense(ha, sts_entry, srb);
311
afaf5a2d
DS		 312 break;
313
314 case SCS_DEVICE_LOGGED_OUT:
315 case SCS_DEVICE_UNAVAILABLE:
f4f5df23
VC		 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));
afaf5a2d
DS		 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 */
b3a271a9
MR		 325 if (iscsi_is_session_online(ddb_entry->sess))
326 qla4xxx_mark_device_missing(ddb_entry->sess);
afaf5a2d 327
56d7fcfa 328 cmd->result = DID_TRANSPORT_DISRUPTED << 16;
afaf5a2d
DS		 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
351status_entry_exit:
352
94bced3c 353 /* complete the request, if not waiting for status_continuation pkt */
afaf5a2d 354 srb->cc_stat = sts_entry->completionStatus;
94bced3c 355 if (ha->status_srb == NULL)
09a0f719 356 kref_put(&srb->srb_ref, qla4xxx_srb_compl);
afaf5a2d
DS		 357}
358
b3a271a9
MR		 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 **/
364static 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
c0b9d3f7
VC		 404static 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
425static 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)
1a590cab 450 status = ISCSI_PING_SUCCESS;
c0b9d3f7 451 else
1a590cab 452 status = mbox_sts_entry->out_mbox[6];
c0b9d3f7
VC		 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
afaf5a2d
DS		 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 **/
f4f5df23 476void qla4xxx_process_response_queue(struct scsi_qla_host *ha)
afaf5a2d
DS		 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 */
f4f5df23 483 while ((ha->response_ptr->signature != RESPONSE_PROCESSED)) {
afaf5a2d
DS		 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:
94bced3c 499 /* Common status */
afaf5a2d
DS		 500 qla4xxx_status_entry(ha, sts_entry);
501 break;
502
503 case ET_PASSTHRU_STATUS:
b3a271a9
MR		 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
afaf5a2d
DS		 512 break;
513
514 case ET_STATUS_CONTINUATION:
94bced3c
KH		 515 qla4xxx_status_cont_entry(ha,
516 (struct status_cont_entry *) sts_entry);
afaf5a2d
DS		 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;
09a0f719 536 kref_put(&srb->srb_ref, qla4xxx_srb_compl);
afaf5a2d
DS		 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
c0b9d3f7
VC		 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
afaf5a2d
DS		 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 }
f4f5df23
VC		 563 ((struct response *)sts_entry)->signature = RESPONSE_PROCESSED;
564 wmb();
afaf5a2d
DS		 565 }
566
567 /*
f4f5df23 568 * Tell ISP we're done with response(s). This also clears the interrupt.
afaf5a2d 569 */
f4f5df23 570 ha->isp_ops->complete_iocb(ha);
afaf5a2d
DS		 571
572 return;
573
574exit_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
579exit_prq_error:
f4f5df23 580 ha->isp_ops->complete_iocb(ha);
afaf5a2d
DS		 581 set_bit(DPC_RESET_HA, &ha->dpc_flags);
582}
583
584/**
585 * qla4xxx_isr_decode_mailbox - decodes mailbox status
586 * @ha: Pointer to host adapter structure.
587 * @mailbox_status: Mailbox status.
588 *
589 * This routine decodes the mailbox status during the ISR.
590 * Hardware_lock locked upon entry. runs in interrupt context.
591 **/
592static void qla4xxx_isr_decode_mailbox(struct scsi_qla_host * ha,
593 uint32_t mbox_status)
594{
595 int i;
f4f5df23 596 uint32_t mbox_sts[MBOX_AEN_REG_COUNT];
afaf5a2d
DS		 597
598 if ((mbox_status == MBOX_STS_BUSY) ||
599 (mbox_status == MBOX_STS_INTERMEDIATE_COMPLETION) ||
600 (mbox_status >> 12 == MBOX_COMPLETION_STATUS)) {
601 ha->mbox_status[0] = mbox_status;
602
603 if (test_bit(AF_MBOX_COMMAND, &ha->flags)) {
604 /*
605 * Copy all mailbox registers to a temporary
606 * location and set mailbox command done flag
607 */
f4f5df23
VC		 608 for (i = 0; i < ha->mbox_status_count; i++)
609 ha->mbox_status[i] = is_qla8022(ha)
610 ? readl(&ha->qla4_8xxx_reg->mailbox_out[i])
611 : readl(&ha->reg->mailbox[i]);
afaf5a2d
DS		 612
613 set_bit(AF_MBOX_COMMAND_DONE, &ha->flags);
f4f5df23
VC		 614
615 if (test_bit(AF_MBOX_COMMAND_NOPOLL, &ha->flags))
616 complete(&ha->mbx_intr_comp);
afaf5a2d
DS		 617 }
618 } else if (mbox_status >> 12 == MBOX_ASYNC_EVENT_STATUS) {
f4f5df23
VC		 619 for (i = 0; i < MBOX_AEN_REG_COUNT; i++)
620 mbox_sts[i] = is_qla8022(ha)
621 ? readl(&ha->qla4_8xxx_reg->mailbox_out[i])
622 : readl(&ha->reg->mailbox[i]);
623
afaf5a2d
DS		 624 /* Immediately process the AENs that don't require much work.
625 * Only queue the database_changed AENs */
401425b1
DS		 626 if (ha->aen_log.count < MAX_AEN_ENTRIES) {
627 for (i = 0; i < MBOX_AEN_REG_COUNT; i++)
628 ha->aen_log.entry[ha->aen_log.count].mbox_sts[i] =
f4f5df23 629 mbox_sts[i];
401425b1
DS		 630 ha->aen_log.count++;
631 }
afaf5a2d
DS		 632 switch (mbox_status) {
633 case MBOX_ASTS_SYSTEM_ERROR:
634 /* Log Mailbox registers */
f4f5df23 635 ql4_printk(KERN_INFO, ha, "%s: System Err\n", __func__);
91a772a4
KH		 636 qla4xxx_dump_registers(ha);
637
afaf5a2d 638 if (ql4xdontresethba) {
f4f5df23
VC		 639 DEBUG2(printk("scsi%ld: %s:Don't Reset HBA\n",
640 ha->host_no, __func__));
afaf5a2d
DS		 641 } else {
642 set_bit(AF_GET_CRASH_RECORD, &ha->flags);
643 set_bit(DPC_RESET_HA, &ha->dpc_flags);
644 }
645 break;
646
647 case MBOX_ASTS_REQUEST_TRANSFER_ERROR:
648 case MBOX_ASTS_RESPONSE_TRANSFER_ERROR:
649 case MBOX_ASTS_NVRAM_INVALID:
650 case MBOX_ASTS_IP_ADDRESS_CHANGED:
651 case MBOX_ASTS_DHCP_LEASE_EXPIRED:
652 DEBUG2(printk("scsi%ld: AEN %04x, ERROR Status, "
653 "Reset HA\n", ha->host_no, mbox_status));
4c6a794d
VC		 654 if (is_qla8022(ha))
655 set_bit(DPC_RESET_HA_FW_CONTEXT,
656 &ha->dpc_flags);
657 else
658 set_bit(DPC_RESET_HA, &ha->dpc_flags);
afaf5a2d
DS		 659 break;
660
661 case MBOX_ASTS_LINK_UP:
afaf5a2d 662 set_bit(AF_LINK_UP, &ha->flags);
065aa1b4
VC		 663 if (test_bit(AF_INIT_DONE, &ha->flags))
664 set_bit(DPC_LINK_CHANGED, &ha->dpc_flags);
665
f4f5df23 666 ql4_printk(KERN_INFO, ha, "%s: LINK UP\n", __func__);
ff884430
VC		 667 qla4xxx_post_aen_work(ha, ISCSI_EVENT_LINKUP,
668 sizeof(mbox_sts),
669 (uint8_t *) mbox_sts);
afaf5a2d
DS		 670 break;
671
672 case MBOX_ASTS_LINK_DOWN:
afaf5a2d 673 clear_bit(AF_LINK_UP, &ha->flags);
f4f5df23
VC		 674 if (test_bit(AF_INIT_DONE, &ha->flags))
675 set_bit(DPC_LINK_CHANGED, &ha->dpc_flags);
065aa1b4 676
f4f5df23 677 ql4_printk(KERN_INFO, ha, "%s: LINK DOWN\n", __func__);
ff884430
VC		 678 qla4xxx_post_aen_work(ha, ISCSI_EVENT_LINKDOWN,
679 sizeof(mbox_sts),
680 (uint8_t *) mbox_sts);
afaf5a2d
DS		 681 break;
682
683 case MBOX_ASTS_HEARTBEAT:
684 ha->seconds_since_last_heartbeat = 0;
685 break;
686
687 case MBOX_ASTS_DHCP_LEASE_ACQUIRED:
688 DEBUG2(printk("scsi%ld: AEN %04x DHCP LEASE "
689 "ACQUIRED\n", ha->host_no, mbox_status));
690 set_bit(DPC_GET_DHCP_IP_ADDR, &ha->dpc_flags);
691 break;
692
693 case MBOX_ASTS_PROTOCOL_STATISTIC_ALARM:
694 case MBOX_ASTS_SCSI_COMMAND_PDU_REJECTED: /* Target
695 * mode
696 * only */
697 case MBOX_ASTS_UNSOLICITED_PDU_RECEIVED: /* Connection mode */
698 case MBOX_ASTS_IPSEC_SYSTEM_FATAL_ERROR:
699 case MBOX_ASTS_SUBNET_STATE_CHANGE:
185f107e 700 case MBOX_ASTS_DUPLICATE_IP:
afaf5a2d
DS		 701 /* No action */
702 DEBUG2(printk("scsi%ld: AEN %04x\n", ha->host_no,
703 mbox_status));
704 break;
705
401425b1 706 case MBOX_ASTS_IP_ADDR_STATE_CHANGED:
f4f5df23
VC		 707 printk("scsi%ld: AEN %04x, mbox_sts[2]=%04x, "
708 "mbox_sts[3]=%04x\n", ha->host_no, mbox_sts[0],
709 mbox_sts[2], mbox_sts[3]);
710
711 /* mbox_sts[2] = Old ACB state
712 * mbox_sts[3] = new ACB state */
713 if ((mbox_sts[3] == ACB_STATE_VALID) &&
e128271b
PM		 714 ((mbox_sts[2] == ACB_STATE_TENTATIVE) ||
715 (mbox_sts[2] == ACB_STATE_ACQUIRING)))
401425b1 716 set_bit(DPC_GET_DHCP_IP_ADDR, &ha->dpc_flags);
f4f5df23 717 else if ((mbox_sts[3] == ACB_STATE_ACQUIRING) &&
4c6a794d
VC		 718 (mbox_sts[2] == ACB_STATE_VALID)) {
719 if (is_qla8022(ha))
720 set_bit(DPC_RESET_HA_FW_CONTEXT,
721 &ha->dpc_flags);
722 else
723 set_bit(DPC_RESET_HA, &ha->dpc_flags);
724 } else if ((mbox_sts[3] == ACB_STATE_UNCONFIGURED))
95d31262 725 complete(&ha->disable_acb_comp);
401425b1
DS		 726 break;
727
afaf5a2d
DS		 728 case MBOX_ASTS_MAC_ADDRESS_CHANGED:
729 case MBOX_ASTS_DNS:
730 /* No action */
731 DEBUG2(printk(KERN_INFO "scsi%ld: AEN %04x, "
732 "mbox_sts[1]=%04x, mbox_sts[2]=%04x\n",
f4f5df23
VC		 733 ha->host_no, mbox_sts[0],
734 mbox_sts[1], mbox_sts[2]));
afaf5a2d
DS		 735 break;
736
737 case MBOX_ASTS_SELF_TEST_FAILED:
738 case MBOX_ASTS_LOGIN_FAILED:
739 /* No action */
740 DEBUG2(printk("scsi%ld: AEN %04x, mbox_sts[1]=%04x, "
741 "mbox_sts[2]=%04x, mbox_sts[3]=%04x\n",
f4f5df23
VC		 742 ha->host_no, mbox_sts[0], mbox_sts[1],
743 mbox_sts[2], mbox_sts[3]));
afaf5a2d
DS		 744 break;
745
746 case MBOX_ASTS_DATABASE_CHANGED:
747 /* Queue AEN information and process it in the DPC
748 * routine */
749 if (ha->aen_q_count > 0) {
afaf5a2d
DS		 750
751 /* decrement available counter */
752 ha->aen_q_count--;
753
f4f5df23 754 for (i = 0; i < MBOX_AEN_REG_COUNT; i++)
afaf5a2d 755 ha->aen_q[ha->aen_in].mbox_sts[i] =
f4f5df23 756 mbox_sts[i];
afaf5a2d
DS		 757
758 /* print debug message */
185f107e
PM		 759 DEBUG2(printk("scsi%ld: AEN[%d] %04x queued "
760 "mb1:0x%x mb2:0x%x mb3:0x%x "
761 "mb4:0x%x mb5:0x%x\n",
762 ha->host_no, ha->aen_in,
763 mbox_sts[0], mbox_sts[1],
764 mbox_sts[2], mbox_sts[3],
765 mbox_sts[4], mbox_sts[5]));
f4f5df23 766
401425b1
DS		 767 /* advance pointer */
768 ha->aen_in++;
769 if (ha->aen_in == MAX_AEN_ENTRIES)
770 ha->aen_in = 0;
afaf5a2d
DS		 771
772 /* The DPC routine will process the aen */
773 set_bit(DPC_AEN, &ha->dpc_flags);
774 } else {
775 DEBUG2(printk("scsi%ld: %s: aen %04x, queue "
776 "overflowed! AEN LOST!!\n",
777 ha->host_no, __func__,
f4f5df23 778 mbox_sts[0]));
afaf5a2d
DS		 779
780 DEBUG2(printk("scsi%ld: DUMP AEN QUEUE\n",
781 ha->host_no));
782
783 for (i = 0; i < MAX_AEN_ENTRIES; i++) {
784 DEBUG2(printk("AEN[%d] %04x %04x %04x "
f4f5df23
VC		 785 "%04x\n", i, mbox_sts[0],
786 mbox_sts[1], mbox_sts[2],
787 mbox_sts[3]));
afaf5a2d
DS		 788 }
789 }
790 break;
791
6434080b
SS		 792 case MBOX_ASTS_TXSCVR_INSERTED:
793 DEBUG2(printk(KERN_WARNING
794 "scsi%ld: AEN %04x Transceiver"
795 " inserted\n", ha->host_no, mbox_sts[0]));
796 break;
797
798 case MBOX_ASTS_TXSCVR_REMOVED:
799 DEBUG2(printk(KERN_WARNING
800 "scsi%ld: AEN %04x Transceiver"
801 " removed\n", ha->host_no, mbox_sts[0]));
802 break;
803
afaf5a2d
DS		 804 default:
805 DEBUG2(printk(KERN_WARNING
806 "scsi%ld: AEN %04x UNKNOWN\n",
f4f5df23 807 ha->host_no, mbox_sts[0]));
afaf5a2d
DS		 808 break;
809 }
810 } else {
811 DEBUG2(printk("scsi%ld: Unknown mailbox status %08X\n",
812 ha->host_no, mbox_status));
813
814 ha->mbox_status[0] = mbox_status;
815 }
816}
817
f4f5df23
VC		 818/**
819 * qla4_8xxx_interrupt_service_routine - isr
820 * @ha: pointer to host adapter structure.
821 *
822 * This is the main interrupt service routine.
823 * hardware_lock locked upon entry. runs in interrupt context.
824 **/
825void qla4_8xxx_interrupt_service_routine(struct scsi_qla_host *ha,
826 uint32_t intr_status)
827{
828 /* Process response queue interrupt. */
829 if (intr_status & HSRX_RISC_IOCB_INT)
830 qla4xxx_process_response_queue(ha);
831
832 /* Process mailbox/asynch event interrupt.*/
833 if (intr_status & HSRX_RISC_MB_INT)
834 qla4xxx_isr_decode_mailbox(ha,
835 readl(&ha->qla4_8xxx_reg->mailbox_out[0]));
836
837 /* clear the interrupt */
838 writel(0, &ha->qla4_8xxx_reg->host_int);
839 readl(&ha->qla4_8xxx_reg->host_int);
840}
841
afaf5a2d
DS		 842/**
843 * qla4xxx_interrupt_service_routine - isr
844 * @ha: pointer to host adapter structure.
845 *
846 * This is the main interrupt service routine.
847 * hardware_lock locked upon entry. runs in interrupt context.
848 **/
849void qla4xxx_interrupt_service_routine(struct scsi_qla_host * ha,
850 uint32_t intr_status)
851{
852 /* Process response queue interrupt. */
853 if (intr_status & CSR_SCSI_COMPLETION_INTR)
854 qla4xxx_process_response_queue(ha);
855
856 /* Process mailbox/asynch event interrupt.*/
857 if (intr_status & CSR_SCSI_PROCESSOR_INTR) {
858 qla4xxx_isr_decode_mailbox(ha,
859 readl(&ha->reg->mailbox[0]));
860
861 /* Clear Mailbox Interrupt */
862 writel(set_rmask(CSR_SCSI_PROCESSOR_INTR),
863 &ha->reg->ctrl_status);
864 readl(&ha->reg->ctrl_status);
865 }
866}
867
f4f5df23
VC		 868/**
869 * qla4_8xxx_spurious_interrupt - processes spurious interrupt
870 * @ha: pointer to host adapter structure.
871 * @reqs_count: .
872 *
873 **/
874static void qla4_8xxx_spurious_interrupt(struct scsi_qla_host *ha,
875 uint8_t reqs_count)
876{
877 if (reqs_count)
878 return;
879
880 DEBUG2(ql4_printk(KERN_INFO, ha, "Spurious Interrupt\n"));
881 if (is_qla8022(ha)) {
882 writel(0, &ha->qla4_8xxx_reg->host_int);
883 if (test_bit(AF_INTx_ENABLED, &ha->flags))
884 qla4_8xxx_wr_32(ha, ha->nx_legacy_intr.tgt_mask_reg,
885 0xfbff);
886 }
887 ha->spurious_int_count++;
888}
889
afaf5a2d
DS		 890/**
891 * qla4xxx_intr_handler - hardware interrupt handler.
892 * @irq: Unused
893 * @dev_id: Pointer to host adapter structure
afaf5a2d 894 **/
7d12e780 895irqreturn_t qla4xxx_intr_handler(int irq, void *dev_id)
afaf5a2d
DS		 896{
897 struct scsi_qla_host *ha;
898 uint32_t intr_status;
899 unsigned long flags = 0;
900 uint8_t reqs_count = 0;
901
902 ha = (struct scsi_qla_host *) dev_id;
903 if (!ha) {
904 DEBUG2(printk(KERN_INFO
905 "qla4xxx: Interrupt with NULL host ptr\n"));
906 return IRQ_NONE;
907 }
908
909 spin_lock_irqsave(&ha->hardware_lock, flags);
910
d915058f 911 ha->isr_count++;
afaf5a2d
DS		 912 /*
913 * Repeatedly service interrupts up to a maximum of
914 * MAX_REQS_SERVICED_PER_INTR
915 */
916 while (1) {
917 /*
918 * Read interrupt status
919 */
f4f5df23 920 if (ha->isp_ops->rd_shdw_rsp_q_in(ha) !=
afaf5a2d
DS		 921 ha->response_out)
922 intr_status = CSR_SCSI_COMPLETION_INTR;
923 else
924 intr_status = readl(&ha->reg->ctrl_status);
925
926 if ((intr_status &
f4f5df23 927 (CSR_SCSI_RESET_INTR|CSR_FATAL_ERROR|INTR_PENDING)) == 0) {
afaf5a2d
DS		 928 if (reqs_count == 0)
929 ha->spurious_int_count++;
930 break;
931 }
932
933 if (intr_status & CSR_FATAL_ERROR) {
934 DEBUG2(printk(KERN_INFO "scsi%ld: Fatal Error, "
935 "Status 0x%04x\n", ha->host_no,
936 readl(isp_port_error_status (ha))));
937
938 /* Issue Soft Reset to clear this error condition.
939 * This will prevent the RISC from repeatedly
940 * interrupting the driver; thus, allowing the DPC to
941 * get scheduled to continue error recovery.
942 * NOTE: Disabling RISC interrupts does not work in
943 * this case, as CSR_FATAL_ERROR overrides
944 * CSR_SCSI_INTR_ENABLE */
945 if ((readl(&ha->reg->ctrl_status) &
946 CSR_SCSI_RESET_INTR) == 0) {
947 writel(set_rmask(CSR_SOFT_RESET),
948 &ha->reg->ctrl_status);
949 readl(&ha->reg->ctrl_status);
950 }
951
952 writel(set_rmask(CSR_FATAL_ERROR),
953 &ha->reg->ctrl_status);
954 readl(&ha->reg->ctrl_status);
955
956 __qla4xxx_disable_intrs(ha);
957
958 set_bit(DPC_RESET_HA, &ha->dpc_flags);
959
960 break;
961 } else if (intr_status & CSR_SCSI_RESET_INTR) {
962 clear_bit(AF_ONLINE, &ha->flags);
963 __qla4xxx_disable_intrs(ha);
964
965 writel(set_rmask(CSR_SCSI_RESET_INTR),
966 &ha->reg->ctrl_status);
967 readl(&ha->reg->ctrl_status);
968
7eece5a0 969 if (!test_bit(AF_HA_REMOVAL, &ha->flags))
477ffb9d 970 set_bit(DPC_RESET_HA_INTR, &ha->dpc_flags);
afaf5a2d
DS		 971
972 break;
973 } else if (intr_status & INTR_PENDING) {
f4f5df23 974 ha->isp_ops->interrupt_service_routine(ha, intr_status);
afaf5a2d
DS		 975 ha->total_io_count++;
976 if (++reqs_count == MAX_REQS_SERVICED_PER_INTR)
977 break;
f4f5df23
VC		 978 }
979 }
980
981 spin_unlock_irqrestore(&ha->hardware_lock, flags);
982
983 return IRQ_HANDLED;
984}
985
986/**
987 * qla4_8xxx_intr_handler - hardware interrupt handler.
988 * @irq: Unused
989 * @dev_id: Pointer to host adapter structure
990 **/
991irqreturn_t qla4_8xxx_intr_handler(int irq, void *dev_id)
992{
993 struct scsi_qla_host *ha = dev_id;
994 uint32_t intr_status;
995 uint32_t status;
996 unsigned long flags = 0;
997 uint8_t reqs_count = 0;
998
2232be0d
LC		 999 if (unlikely(pci_channel_offline(ha->pdev)))
1000 return IRQ_HANDLED;
1001
f4f5df23
VC		 1002 ha->isr_count++;
1003 status = qla4_8xxx_rd_32(ha, ISR_INT_VECTOR);
1004 if (!(status & ha->nx_legacy_intr.int_vec_bit))
1005 return IRQ_NONE;
1006
1007 status = qla4_8xxx_rd_32(ha, ISR_INT_STATE_REG);
1008 if (!ISR_IS_LEGACY_INTR_TRIGGERED(status)) {
1009 DEBUG2(ql4_printk(KERN_INFO, ha,
1010 "%s legacy Int not triggered\n", __func__));
1011 return IRQ_NONE;
1012 }
1013
1014 /* clear the interrupt */
1015 qla4_8xxx_wr_32(ha, ha->nx_legacy_intr.tgt_status_reg, 0xffffffff);
1016
1017 /* read twice to ensure write is flushed */
1018 qla4_8xxx_rd_32(ha, ISR_INT_VECTOR);
1019 qla4_8xxx_rd_32(ha, ISR_INT_VECTOR);
1020
1021 spin_lock_irqsave(&ha->hardware_lock, flags);
1022 while (1) {
1023 if (!(readl(&ha->qla4_8xxx_reg->host_int) &
1024 ISRX_82XX_RISC_INT)) {
1025 qla4_8xxx_spurious_interrupt(ha, reqs_count);
1026 break;
1027 }
1028 intr_status = readl(&ha->qla4_8xxx_reg->host_status);
1029 if ((intr_status &
1030 (HSRX_RISC_MB_INT | HSRX_RISC_IOCB_INT)) == 0) {
1031 qla4_8xxx_spurious_interrupt(ha, reqs_count);
1032 break;
1033 }
1034
1035 ha->isp_ops->interrupt_service_routine(ha, intr_status);
1036
1037 /* Enable Interrupt */
1038 qla4_8xxx_wr_32(ha, ha->nx_legacy_intr.tgt_mask_reg, 0xfbff);
afaf5a2d 1039
f4f5df23
VC		 1040 if (++reqs_count == MAX_REQS_SERVICED_PER_INTR)
1041 break;
1042 }
1043
1044 spin_unlock_irqrestore(&ha->hardware_lock, flags);
1045 return IRQ_HANDLED;
1046}
1047
1048irqreturn_t
1049qla4_8xxx_msi_handler(int irq, void *dev_id)
1050{
1051 struct scsi_qla_host *ha;
1052
1053 ha = (struct scsi_qla_host *) dev_id;
1054 if (!ha) {
1055 DEBUG2(printk(KERN_INFO
1056 "qla4xxx: MSIX: Interrupt with NULL host ptr\n"));
1057 return IRQ_NONE;
1058 }
1059
1060 ha->isr_count++;
1061 /* clear the interrupt */
1062 qla4_8xxx_wr_32(ha, ha->nx_legacy_intr.tgt_status_reg, 0xffffffff);
1063
1064 /* read twice to ensure write is flushed */
1065 qla4_8xxx_rd_32(ha, ISR_INT_VECTOR);
1066 qla4_8xxx_rd_32(ha, ISR_INT_VECTOR);
1067
1068 return qla4_8xxx_default_intr_handler(irq, dev_id);
1069}
1070
1071/**
1072 * qla4_8xxx_default_intr_handler - hardware interrupt handler.
1073 * @irq: Unused
1074 * @dev_id: Pointer to host adapter structure
1075 *
1076 * This interrupt handler is called directly for MSI-X, and
1077 * called indirectly for MSI.
1078 **/
1079irqreturn_t
1080qla4_8xxx_default_intr_handler(int irq, void *dev_id)
1081{
1082 struct scsi_qla_host *ha = dev_id;
1083 unsigned long flags;
1084 uint32_t intr_status;
1085 uint8_t reqs_count = 0;
1086
1087 spin_lock_irqsave(&ha->hardware_lock, flags);
1088 while (1) {
1089 if (!(readl(&ha->qla4_8xxx_reg->host_int) &
1090 ISRX_82XX_RISC_INT)) {
1091 qla4_8xxx_spurious_interrupt(ha, reqs_count);
1092 break;
1093 }
1094
1095 intr_status = readl(&ha->qla4_8xxx_reg->host_status);
1096 if ((intr_status &
1097 (HSRX_RISC_MB_INT | HSRX_RISC_IOCB_INT)) == 0) {
1098 qla4_8xxx_spurious_interrupt(ha, reqs_count);
1099 break;
afaf5a2d 1100 }
f4f5df23
VC		 1101
1102 ha->isp_ops->interrupt_service_routine(ha, intr_status);
1103
1104 if (++reqs_count == MAX_REQS_SERVICED_PER_INTR)
1105 break;
afaf5a2d
DS		 1106 }
1107
f4f5df23 1108 ha->isr_count++;
afaf5a2d 1109 spin_unlock_irqrestore(&ha->hardware_lock, flags);
f4f5df23
VC		 1110 return IRQ_HANDLED;
1111}
afaf5a2d 1112
f4f5df23
VC		 1113irqreturn_t
1114qla4_8xxx_msix_rsp_q(int irq, void *dev_id)
1115{
1116 struct scsi_qla_host *ha = dev_id;
1117 unsigned long flags;
1118
1119 spin_lock_irqsave(&ha->hardware_lock, flags);
1120 qla4xxx_process_response_queue(ha);
1121 writel(0, &ha->qla4_8xxx_reg->host_int);
1122 spin_unlock_irqrestore(&ha->hardware_lock, flags);
1123
1124 ha->isr_count++;
afaf5a2d
DS		 1125 return IRQ_HANDLED;
1126}
1127
1128/**
1129 * qla4xxx_process_aen - processes AENs generated by firmware
1130 * @ha: pointer to host adapter structure.
1131 * @process_aen: type of AENs to process
1132 *
1133 * Processes specific types of Asynchronous Events generated by firmware.
1134 * The type of AENs to process is specified by process_aen and can be
1135 * PROCESS_ALL_AENS 0
1136 * FLUSH_DDB_CHANGED_AENS 1
1137 * RELOGIN_DDB_CHANGED_AENS 2
1138 **/
1139void qla4xxx_process_aen(struct scsi_qla_host * ha, uint8_t process_aen)
1140{
1141 uint32_t mbox_sts[MBOX_AEN_REG_COUNT];
1142 struct aen *aen;
1143 int i;
1144 unsigned long flags;
1145
1146 spin_lock_irqsave(&ha->hardware_lock, flags);
1147 while (ha->aen_out != ha->aen_in) {
afaf5a2d 1148 aen = &ha->aen_q[ha->aen_out];
afaf5a2d
DS		 1149 /* copy aen information to local structure */
1150 for (i = 0; i < MBOX_AEN_REG_COUNT; i++)
1151 mbox_sts[i] = aen->mbox_sts[i];
1152
401425b1
DS		 1153 ha->aen_q_count++;
1154 ha->aen_out++;
1155
1156 if (ha->aen_out == MAX_AEN_ENTRIES)
1157 ha->aen_out = 0;
1158
afaf5a2d
DS		 1159 spin_unlock_irqrestore(&ha->hardware_lock, flags);
1160
401425b1
DS		 1161 DEBUG2(printk("qla4xxx(%ld): AEN[%d]=0x%08x, mbx1=0x%08x mbx2=0x%08x"
1162 " mbx3=0x%08x mbx4=0x%08x\n", ha->host_no,
1163 (ha->aen_out ? (ha->aen_out-1): (MAX_AEN_ENTRIES-1)),
1164 mbox_sts[0], mbox_sts[1], mbox_sts[2],
1165 mbox_sts[3], mbox_sts[4]));
afaf5a2d
DS		 1166
1167 switch (mbox_sts[0]) {
1168 case MBOX_ASTS_DATABASE_CHANGED:
b3a271a9
MR		 1169 switch (process_aen) {
1170 case FLUSH_DDB_CHANGED_AENS:
afaf5a2d
DS		 1171 DEBUG2(printk("scsi%ld: AEN[%d] %04x, index "
1172 "[%d] state=%04x FLUSHED!\n",
1173 ha->host_no, ha->aen_out,
1174 mbox_sts[0], mbox_sts[2],
1175 mbox_sts[3]));
1176 break;
b3a271a9
MR		 1177 case PROCESS_ALL_AENS:
1178 default:
1179 /* Specific device. */
1180 if (mbox_sts[1] == 1)
1181 qla4xxx_process_ddb_changed(ha,
1182 mbox_sts[2], mbox_sts[3],
1183 mbox_sts[4]);
1184 break;
afaf5a2d 1185 }
afaf5a2d
DS		 1186 }
1187 spin_lock_irqsave(&ha->hardware_lock, flags);
1188 }
1189 spin_unlock_irqrestore(&ha->hardware_lock, flags);
afaf5a2d
DS		 1190}
1191
f4f5df23
VC		 1192int qla4xxx_request_irqs(struct scsi_qla_host *ha)
1193{
1194 int ret;
1195
1196 if (!is_qla8022(ha))
1197 goto try_intx;
1198
1199 if (ql4xenablemsix == 2)
1200 goto try_msi;
1201
1202 if (ql4xenablemsix == 0 || ql4xenablemsix != 1)
1203 goto try_intx;
1204
1205 /* Trying MSI-X */
1206 ret = qla4_8xxx_enable_msix(ha);
1207 if (!ret) {
1208 DEBUG2(ql4_printk(KERN_INFO, ha,
1209 "MSI-X: Enabled (0x%X).\n", ha->revision_id));
1210 goto irq_attached;
1211 }
1212
1213 ql4_printk(KERN_WARNING, ha,
1214 "MSI-X: Falling back-to MSI mode -- %d.\n", ret);
1215
1216try_msi:
1217 /* Trying MSI */
1218 ret = pci_enable_msi(ha->pdev);
1219 if (!ret) {
1220 ret = request_irq(ha->pdev->irq, qla4_8xxx_msi_handler,
61391d31 1221 0, DRIVER_NAME, ha);
f4f5df23
VC		 1222 if (!ret) {
1223 DEBUG2(ql4_printk(KERN_INFO, ha, "MSI: Enabled.\n"));
1224 set_bit(AF_MSI_ENABLED, &ha->flags);
1225 goto irq_attached;
1226 } else {
1227 ql4_printk(KERN_WARNING, ha,
1228 "MSI: Failed to reserve interrupt %d "
1229 "already in use.\n", ha->pdev->irq);
1230 pci_disable_msi(ha->pdev);
1231 }
1232 }
1233 ql4_printk(KERN_WARNING, ha,
1234 "MSI: Falling back-to INTx mode -- %d.\n", ret);
1235
1236try_intx:
1237 /* Trying INTx */
1238 ret = request_irq(ha->pdev->irq, ha->isp_ops->intr_handler,
3e1350c4 1239 IRQF_SHARED, DRIVER_NAME, ha);
f4f5df23
VC		 1240 if (!ret) {
1241 DEBUG2(ql4_printk(KERN_INFO, ha, "INTx: Enabled.\n"));
1242 set_bit(AF_INTx_ENABLED, &ha->flags);
1243 goto irq_attached;
1244
1245 } else {
1246 ql4_printk(KERN_WARNING, ha,
1247 "INTx: Failed to reserve interrupt %d already in"
1248 " use.\n", ha->pdev->irq);
1249 return ret;
1250 }
1251
1252irq_attached:
1253 set_bit(AF_IRQ_ATTACHED, &ha->flags);
1254 ha->host->irq = ha->pdev->irq;
1255 ql4_printk(KERN_INFO, ha, "%s: irq %d attached\n",
1256 __func__, ha->pdev->irq);
1257 return ret;
1258}
1259
1260void qla4xxx_free_irqs(struct scsi_qla_host *ha)
1261{
1262 if (test_bit(AF_MSIX_ENABLED, &ha->flags))
1263 qla4_8xxx_disable_msix(ha);
1264 else if (test_and_clear_bit(AF_MSI_ENABLED, &ha->flags)) {
1265 free_irq(ha->pdev->irq, ha);
1266 pci_disable_msi(ha->pdev);
1267 } else if (test_and_clear_bit(AF_INTx_ENABLED, &ha->flags))
1268 free_irq(ha->pdev->irq, ha);
1269}
Linux kernel - Deliverables
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