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Merge branch 'upstream/core' of git://git.kernel.org/pub/scm/linux/kernel/git/jeremy/xen
[net-next-2.6.git] / drivers / scsi / qla4xxx / ql4_isr.c
CommitLineData
afaf5a2d
DS		 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"
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);
28 if (sense_len == 0)
29 return;
30
31 /* Save total available sense length,
32 * not to exceed cmd's sense buffer size */
33 sense_len = min_t(uint16_t, sense_len, SCSI_SENSE_BUFFERSIZE);
34 srb->req_sense_ptr = cmd->sense_buffer;
35 srb->req_sense_len = sense_len;
36
37 /* Copy sense from sts_entry pkt */
38 sense_len = min_t(uint16_t, sense_len, IOCB_MAX_SENSEDATA_LEN);
39 memcpy(cmd->sense_buffer, sts_entry->senseData, sense_len);
40
41 DEBUG2(printk(KERN_INFO "scsi%ld:%d:%d:%d: %s: sense key = %x, "
42 "ASL= %02x, ASC/ASCQ = %02x/%02x\n", ha->host_no,
43 cmd->device->channel, cmd->device->id,
44 cmd->device->lun, __func__,
45 sts_entry->senseData[2] & 0x0f,
46 sts_entry->senseData[7],
47 sts_entry->senseData[12],
48 sts_entry->senseData[13]));
49
50 DEBUG5(qla4xxx_dump_buffer(cmd->sense_buffer, sense_len));
51 srb->flags |= SRB_GOT_SENSE;
52
53 /* Update srb, in case a sts_cont pkt follows */
54 srb->req_sense_ptr += sense_len;
55 srb->req_sense_len -= sense_len;
56 if (srb->req_sense_len != 0)
57 ha->status_srb = srb;
58 else
59 ha->status_srb = NULL;
60}
61
62/**
63 * qla4xxx_status_cont_entry - Process a Status Continuations entry.
64 * @ha: SCSI driver HA context
65 * @sts_cont: Entry pointer
66 *
67 * Extended sense data.
68 */
69static void
70qla4xxx_status_cont_entry(struct scsi_qla_host *ha,
71 struct status_cont_entry *sts_cont)
72{
73 struct srb *srb = ha->status_srb;
74 struct scsi_cmnd *cmd;
735e4154 75 uint16_t sense_len;
94bced3c
KH		 76
77 if (srb == NULL)
78 return;
79
80 cmd = srb->cmd;
81 if (cmd == NULL) {
82 DEBUG2(printk(KERN_INFO "scsi%ld: %s: Cmd already returned "
83 "back to OS srb=%p srb->state:%d\n", ha->host_no,
84 __func__, srb, srb->state));
85 ha->status_srb = NULL;
86 return;
87 }
88
89 /* Copy sense data. */
90 sense_len = min_t(uint16_t, srb->req_sense_len,
91 IOCB_MAX_EXT_SENSEDATA_LEN);
92 memcpy(srb->req_sense_ptr, sts_cont->ext_sense_data, sense_len);
93 DEBUG5(qla4xxx_dump_buffer(srb->req_sense_ptr, sense_len));
94
95 srb->req_sense_ptr += sense_len;
96 srb->req_sense_len -= sense_len;
97
98 /* Place command on done queue. */
99 if (srb->req_sense_len == 0) {
09a0f719 100 kref_put(&srb->srb_ref, qla4xxx_srb_compl);
94bced3c
KH		 101 ha->status_srb = NULL;
102 }
103}
104
afaf5a2d
DS		 105/**
106 * qla4xxx_status_entry - processes status IOCBs
107 * @ha: Pointer to host adapter structure.
108 * @sts_entry: Pointer to status entry structure.
109 **/
110static void qla4xxx_status_entry(struct scsi_qla_host *ha,
111 struct status_entry *sts_entry)
112{
113 uint8_t scsi_status;
114 struct scsi_cmnd *cmd;
115 struct srb *srb;
116 struct ddb_entry *ddb_entry;
117 uint32_t residual;
afaf5a2d 118
afaf5a2d
DS		 119 srb = qla4xxx_del_from_active_array(ha, le32_to_cpu(sts_entry->handle));
120 if (!srb) {
afaf5a2d
DS		 121 DEBUG2(printk(KERN_WARNING "scsi%ld: %s: Status Entry invalid "
122 "handle 0x%x, sp=%p. This cmd may have already "
123 "been completed.\n", ha->host_no, __func__,
124 le32_to_cpu(sts_entry->handle), srb));
c2660df3
VC		 125 ql4_printk(KERN_WARNING, ha, "%s invalid status entry:"
126 " handle=0x%0x\n", __func__, sts_entry->handle);
9d562913 127 set_bit(DPC_RESET_HA, &ha->dpc_flags);
afaf5a2d
DS		 128 return;
129 }
130
131 cmd = srb->cmd;
132 if (cmd == NULL) {
133 DEBUG2(printk("scsi%ld: %s: Command already returned back to "
134 "OS pkt->handle=%d srb=%p srb->state:%d\n",
135 ha->host_no, __func__, sts_entry->handle,
136 srb, srb->state));
c2660df3
VC		 137 ql4_printk(KERN_WARNING, ha, "Command is NULL:"
138 " already returned to OS (srb=%p)\n", srb);
afaf5a2d
DS		 139 return;
140 }
141
142 ddb_entry = srb->ddb;
143 if (ddb_entry == NULL) {
144 cmd->result = DID_NO_CONNECT << 16;
145 goto status_entry_exit;
146 }
147
148 residual = le32_to_cpu(sts_entry->residualByteCnt);
149
150 /* Translate ISP error to a Linux SCSI error. */
151 scsi_status = sts_entry->scsiStatus;
152 switch (sts_entry->completionStatus) {
153 case SCS_COMPLETE:
afaf5a2d 154
6ea7e33e
DS		 155 if (sts_entry->iscsiFlags & ISCSI_FLAG_RESIDUAL_OVER) {
156 cmd->result = DID_ERROR << 16;
157 break;
158 }
159
160 if (sts_entry->iscsiFlags &ISCSI_FLAG_RESIDUAL_UNDER) {
5f7186c8 161 scsi_set_resid(cmd, residual);
9d562913
DS		 162 if (!scsi_status && ((scsi_bufflen(cmd) - residual) <
163 cmd->underflow)) {
6ea7e33e
DS		 164
165 cmd->result = DID_ERROR << 16;
166
167 DEBUG2(printk("scsi%ld:%d:%d:%d: %s: "
168 "Mid-layer Data underrun0, "
169 "xferlen = 0x%x, "
170 "residual = 0x%x\n", ha->host_no,
171 cmd->device->channel,
172 cmd->device->id,
173 cmd->device->lun, __func__,
174 scsi_bufflen(cmd), residual));
175 break;
176 }
177 }
afaf5a2d
DS		 178
179 cmd->result = DID_OK << 16 | scsi_status;
180
181 if (scsi_status != SCSI_CHECK_CONDITION)
182 break;
183
184 /* Copy Sense Data into sense buffer. */
94bced3c 185 qla4xxx_copy_sense(ha, sts_entry, srb);
afaf5a2d
DS		 186 break;
187
188 case SCS_INCOMPLETE:
189 /* Always set the status to DID_ERROR, since
190 * all conditions result in that status anyway */
191 cmd->result = DID_ERROR << 16;
192 break;
193
194 case SCS_RESET_OCCURRED:
195 DEBUG2(printk("scsi%ld:%d:%d:%d: %s: Device RESET occurred\n",
196 ha->host_no, cmd->device->channel,
197 cmd->device->id, cmd->device->lun, __func__));
198
199 cmd->result = DID_RESET << 16;
200 break;
201
202 case SCS_ABORTED:
203 DEBUG2(printk("scsi%ld:%d:%d:%d: %s: Abort occurred\n",
204 ha->host_no, cmd->device->channel,
205 cmd->device->id, cmd->device->lun, __func__));
206
207 cmd->result = DID_RESET << 16;
208 break;
209
210 case SCS_TIMEOUT:
211 DEBUG2(printk(KERN_INFO "scsi%ld:%d:%d:%d: Timeout\n",
212 ha->host_no, cmd->device->channel,
213 cmd->device->id, cmd->device->lun));
214
56d7fcfa 215 cmd->result = DID_TRANSPORT_DISRUPTED << 16;
afaf5a2d
DS		 216
217 /*
218 * Mark device missing so that we won't continue to send
219 * I/O to this device. We should get a ddb state change
220 * AEN soon.
221 */
222 if (atomic_read(&ddb_entry->state) == DDB_STATE_ONLINE)
223 qla4xxx_mark_device_missing(ha, ddb_entry);
224 break;
225
226 case SCS_DATA_UNDERRUN:
227 case SCS_DATA_OVERRUN:
6ea7e33e 228 if ((sts_entry->iscsiFlags & ISCSI_FLAG_RESIDUAL_OVER) ||
b06fc73a
MC		 229 (sts_entry->completionStatus == SCS_DATA_OVERRUN)) {
230 DEBUG2(printk("scsi%ld:%d:%d:%d: %s: " "Data overrun\n",
231 ha->host_no,
afaf5a2d 232 cmd->device->channel, cmd->device->id,
b06fc73a 233 cmd->device->lun, __func__));
afaf5a2d
DS		 234
235 cmd->result = DID_ERROR << 16;
236 break;
237 }
238
6ea7e33e 239 scsi_set_resid(cmd, residual);
afaf5a2d
DS		 240
241 /*
242 * If there is scsi_status, it takes precedense over
243 * underflow condition.
244 */
245 if (scsi_status != 0) {
246 cmd->result = DID_OK << 16 | scsi_status;
247
248 if (scsi_status != SCSI_CHECK_CONDITION)
249 break;
250
251 /* Copy Sense Data into sense buffer. */
94bced3c 252 qla4xxx_copy_sense(ha, sts_entry, srb);
afaf5a2d
DS		 253 } else {
254 /*
255 * If RISC reports underrun and target does not
256 * report it then we must have a lost frame, so
257 * tell upper layer to retry it by reporting a
258 * bus busy.
259 */
260 if ((sts_entry->iscsiFlags &
261 ISCSI_FLAG_RESIDUAL_UNDER) == 0) {
262 cmd->result = DID_BUS_BUSY << 16;
5f7186c8 263 } else if ((scsi_bufflen(cmd) - residual) <
afaf5a2d
DS		 264 cmd->underflow) {
265 /*
266 * Handle mid-layer underflow???
267 *
268 * For kernels less than 2.4, the driver must
269 * return an error if an underflow is detected.
270 * For kernels equal-to and above 2.4, the
271 * mid-layer will appearantly handle the
272 * underflow by detecting the residual count --
273 * unfortunately, we do not see where this is
274 * actually being done. In the interim, we
275 * will return DID_ERROR.
276 */
277 DEBUG2(printk("scsi%ld:%d:%d:%d: %s: "
6ea7e33e
DS		 278 "Mid-layer Data underrun1, "
279 "xferlen = 0x%x, "
280 "residual = 0x%x\n", ha->host_no,
281 cmd->device->channel,
282 cmd->device->id,
283 cmd->device->lun, __func__,
284 scsi_bufflen(cmd), residual));
afaf5a2d
DS		 285
286 cmd->result = DID_ERROR << 16;
287 } else {
288 cmd->result = DID_OK << 16;
289 }
290 }
291 break;
292
293 case SCS_DEVICE_LOGGED_OUT:
294 case SCS_DEVICE_UNAVAILABLE:
f4f5df23
VC		 295 DEBUG2(printk(KERN_INFO "scsi%ld:%d:%d:%d: SCS_DEVICE "
296 "state: 0x%x\n", ha->host_no,
297 cmd->device->channel, cmd->device->id,
298 cmd->device->lun, sts_entry->completionStatus));
afaf5a2d
DS		 299 /*
300 * Mark device missing so that we won't continue to
301 * send I/O to this device. We should get a ddb
302 * state change AEN soon.
303 */
304 if (atomic_read(&ddb_entry->state) == DDB_STATE_ONLINE)
305 qla4xxx_mark_device_missing(ha, ddb_entry);
306
56d7fcfa 307 cmd->result = DID_TRANSPORT_DISRUPTED << 16;
afaf5a2d
DS		 308 break;
309
310 case SCS_QUEUE_FULL:
311 /*
312 * SCSI Mid-Layer handles device queue full
313 */
314 cmd->result = DID_OK << 16 | sts_entry->scsiStatus;
315 DEBUG2(printk("scsi%ld:%d:%d: %s: QUEUE FULL detected "
316 "compl=%02x, scsi=%02x, state=%02x, iFlags=%02x,"
317 " iResp=%02x\n", ha->host_no, cmd->device->id,
318 cmd->device->lun, __func__,
319 sts_entry->completionStatus,
320 sts_entry->scsiStatus, sts_entry->state_flags,
321 sts_entry->iscsiFlags,
322 sts_entry->iscsiResponse));
323 break;
324
325 default:
326 cmd->result = DID_ERROR << 16;
327 break;
328 }
329
330status_entry_exit:
331
94bced3c 332 /* complete the request, if not waiting for status_continuation pkt */
afaf5a2d 333 srb->cc_stat = sts_entry->completionStatus;
94bced3c 334 if (ha->status_srb == NULL)
09a0f719 335 kref_put(&srb->srb_ref, qla4xxx_srb_compl);
afaf5a2d
DS		 336}
337
338/**
339 * qla4xxx_process_response_queue - process response queue completions
340 * @ha: Pointer to host adapter structure.
341 *
342 * This routine process response queue completions in interrupt context.
343 * Hardware_lock locked upon entry
344 **/
f4f5df23 345void qla4xxx_process_response_queue(struct scsi_qla_host *ha)
afaf5a2d
DS		 346{
347 uint32_t count = 0;
348 struct srb *srb = NULL;
349 struct status_entry *sts_entry;
350
351 /* Process all responses from response queue */
f4f5df23 352 while ((ha->response_ptr->signature != RESPONSE_PROCESSED)) {
afaf5a2d
DS		 353 sts_entry = (struct status_entry *) ha->response_ptr;
354 count++;
355
356 /* Advance pointers for next entry */
357 if (ha->response_out == (RESPONSE_QUEUE_DEPTH - 1)) {
358 ha->response_out = 0;
359 ha->response_ptr = ha->response_ring;
360 } else {
361 ha->response_out++;
362 ha->response_ptr++;
363 }
364
365 /* process entry */
366 switch (sts_entry->hdr.entryType) {
367 case ET_STATUS:
94bced3c 368 /* Common status */
afaf5a2d
DS		 369 qla4xxx_status_entry(ha, sts_entry);
370 break;
371
372 case ET_PASSTHRU_STATUS:
373 break;
374
375 case ET_STATUS_CONTINUATION:
94bced3c
KH		 376 qla4xxx_status_cont_entry(ha,
377 (struct status_cont_entry *) sts_entry);
afaf5a2d
DS		 378 break;
379
380 case ET_COMMAND:
381 /* ISP device queue is full. Command not
382 * accepted by ISP. Queue command for
383 * later */
384
385 srb = qla4xxx_del_from_active_array(ha,
386 le32_to_cpu(sts_entry->
387 handle));
388 if (srb == NULL)
389 goto exit_prq_invalid_handle;
390
391 DEBUG2(printk("scsi%ld: %s: FW device queue full, "
392 "srb %p\n", ha->host_no, __func__, srb));
393
394 /* ETRY normally by sending it back with
395 * DID_BUS_BUSY */
396 srb->cmd->result = DID_BUS_BUSY << 16;
09a0f719 397 kref_put(&srb->srb_ref, qla4xxx_srb_compl);
afaf5a2d
DS		 398 break;
399
400 case ET_CONTINUE:
401 /* Just throw away the continuation entries */
402 DEBUG2(printk("scsi%ld: %s: Continuation entry - "
403 "ignoring\n", ha->host_no, __func__));
404 break;
405
406 default:
407 /*
408 * Invalid entry in response queue, reset RISC
409 * firmware.
410 */
411 DEBUG2(printk("scsi%ld: %s: Invalid entry %x in "
412 "response queue \n", ha->host_no,
413 __func__,
414 sts_entry->hdr.entryType));
415 goto exit_prq_error;
416 }
f4f5df23
VC		 417 ((struct response *)sts_entry)->signature = RESPONSE_PROCESSED;
418 wmb();
afaf5a2d
DS		 419 }
420
421 /*
f4f5df23 422 * Tell ISP we're done with response(s). This also clears the interrupt.
afaf5a2d 423 */
f4f5df23 424 ha->isp_ops->complete_iocb(ha);
afaf5a2d
DS		 425
426 return;
427
428exit_prq_invalid_handle:
429 DEBUG2(printk("scsi%ld: %s: Invalid handle(srb)=%p type=%x IOCS=%x\n",
430 ha->host_no, __func__, srb, sts_entry->hdr.entryType,
431 sts_entry->completionStatus));
432
433exit_prq_error:
f4f5df23 434 ha->isp_ops->complete_iocb(ha);
afaf5a2d
DS		 435 set_bit(DPC_RESET_HA, &ha->dpc_flags);
436}
437
438/**
439 * qla4xxx_isr_decode_mailbox - decodes mailbox status
440 * @ha: Pointer to host adapter structure.
441 * @mailbox_status: Mailbox status.
442 *
443 * This routine decodes the mailbox status during the ISR.
444 * Hardware_lock locked upon entry. runs in interrupt context.
445 **/
446static void qla4xxx_isr_decode_mailbox(struct scsi_qla_host * ha,
447 uint32_t mbox_status)
448{
449 int i;
f4f5df23 450 uint32_t mbox_sts[MBOX_AEN_REG_COUNT];
afaf5a2d
DS		 451
452 if ((mbox_status == MBOX_STS_BUSY) ||
453 (mbox_status == MBOX_STS_INTERMEDIATE_COMPLETION) ||
454 (mbox_status >> 12 == MBOX_COMPLETION_STATUS)) {
455 ha->mbox_status[0] = mbox_status;
456
457 if (test_bit(AF_MBOX_COMMAND, &ha->flags)) {
458 /*
459 * Copy all mailbox registers to a temporary
460 * location and set mailbox command done flag
461 */
f4f5df23
VC		 462 for (i = 0; i < ha->mbox_status_count; i++)
463 ha->mbox_status[i] = is_qla8022(ha)
464 ? readl(&ha->qla4_8xxx_reg->mailbox_out[i])
465 : readl(&ha->reg->mailbox[i]);
afaf5a2d
DS		 466
467 set_bit(AF_MBOX_COMMAND_DONE, &ha->flags);
f4f5df23
VC		 468
469 if (test_bit(AF_MBOX_COMMAND_NOPOLL, &ha->flags))
470 complete(&ha->mbx_intr_comp);
afaf5a2d
DS		 471 }
472 } else if (mbox_status >> 12 == MBOX_ASYNC_EVENT_STATUS) {
f4f5df23
VC		 473 for (i = 0; i < MBOX_AEN_REG_COUNT; i++)
474 mbox_sts[i] = is_qla8022(ha)
475 ? readl(&ha->qla4_8xxx_reg->mailbox_out[i])
476 : readl(&ha->reg->mailbox[i]);
477
afaf5a2d
DS		 478 /* Immediately process the AENs that don't require much work.
479 * Only queue the database_changed AENs */
401425b1
DS		 480 if (ha->aen_log.count < MAX_AEN_ENTRIES) {
481 for (i = 0; i < MBOX_AEN_REG_COUNT; i++)
482 ha->aen_log.entry[ha->aen_log.count].mbox_sts[i] =
f4f5df23 483 mbox_sts[i];
401425b1
DS		 484 ha->aen_log.count++;
485 }
afaf5a2d
DS		 486 switch (mbox_status) {
487 case MBOX_ASTS_SYSTEM_ERROR:
488 /* Log Mailbox registers */
f4f5df23 489 ql4_printk(KERN_INFO, ha, "%s: System Err\n", __func__);
91a772a4
KH		 490 qla4xxx_dump_registers(ha);
491
afaf5a2d 492 if (ql4xdontresethba) {
f4f5df23
VC		 493 DEBUG2(printk("scsi%ld: %s:Don't Reset HBA\n",
494 ha->host_no, __func__));
afaf5a2d
DS		 495 } else {
496 set_bit(AF_GET_CRASH_RECORD, &ha->flags);
497 set_bit(DPC_RESET_HA, &ha->dpc_flags);
498 }
499 break;
500
501 case MBOX_ASTS_REQUEST_TRANSFER_ERROR:
502 case MBOX_ASTS_RESPONSE_TRANSFER_ERROR:
503 case MBOX_ASTS_NVRAM_INVALID:
504 case MBOX_ASTS_IP_ADDRESS_CHANGED:
505 case MBOX_ASTS_DHCP_LEASE_EXPIRED:
506 DEBUG2(printk("scsi%ld: AEN %04x, ERROR Status, "
507 "Reset HA\n", ha->host_no, mbox_status));
508 set_bit(DPC_RESET_HA, &ha->dpc_flags);
509 break;
510
511 case MBOX_ASTS_LINK_UP:
afaf5a2d 512 set_bit(AF_LINK_UP, &ha->flags);
065aa1b4
VC		 513 if (test_bit(AF_INIT_DONE, &ha->flags))
514 set_bit(DPC_LINK_CHANGED, &ha->dpc_flags);
515
f4f5df23 516 ql4_printk(KERN_INFO, ha, "%s: LINK UP\n", __func__);
afaf5a2d
DS		 517 break;
518
519 case MBOX_ASTS_LINK_DOWN:
afaf5a2d 520 clear_bit(AF_LINK_UP, &ha->flags);
f4f5df23
VC		 521 if (test_bit(AF_INIT_DONE, &ha->flags))
522 set_bit(DPC_LINK_CHANGED, &ha->dpc_flags);
065aa1b4 523
f4f5df23 524 ql4_printk(KERN_INFO, ha, "%s: LINK DOWN\n", __func__);
afaf5a2d
DS		 525 break;
526
527 case MBOX_ASTS_HEARTBEAT:
528 ha->seconds_since_last_heartbeat = 0;
529 break;
530
531 case MBOX_ASTS_DHCP_LEASE_ACQUIRED:
532 DEBUG2(printk("scsi%ld: AEN %04x DHCP LEASE "
533 "ACQUIRED\n", ha->host_no, mbox_status));
534 set_bit(DPC_GET_DHCP_IP_ADDR, &ha->dpc_flags);
535 break;
536
537 case MBOX_ASTS_PROTOCOL_STATISTIC_ALARM:
538 case MBOX_ASTS_SCSI_COMMAND_PDU_REJECTED: /* Target
539 * mode
540 * only */
541 case MBOX_ASTS_UNSOLICITED_PDU_RECEIVED: /* Connection mode */
542 case MBOX_ASTS_IPSEC_SYSTEM_FATAL_ERROR:
543 case MBOX_ASTS_SUBNET_STATE_CHANGE:
544 /* No action */
545 DEBUG2(printk("scsi%ld: AEN %04x\n", ha->host_no,
546 mbox_status));
547 break;
548
401425b1 549 case MBOX_ASTS_IP_ADDR_STATE_CHANGED:
f4f5df23
VC		 550 printk("scsi%ld: AEN %04x, mbox_sts[2]=%04x, "
551 "mbox_sts[3]=%04x\n", ha->host_no, mbox_sts[0],
552 mbox_sts[2], mbox_sts[3]);
553
554 /* mbox_sts[2] = Old ACB state
555 * mbox_sts[3] = new ACB state */
556 if ((mbox_sts[3] == ACB_STATE_VALID) &&
557 (mbox_sts[2] == ACB_STATE_TENTATIVE))
401425b1 558 set_bit(DPC_GET_DHCP_IP_ADDR, &ha->dpc_flags);
f4f5df23
VC		 559 else if ((mbox_sts[3] == ACB_STATE_ACQUIRING) &&
560 (mbox_sts[2] == ACB_STATE_VALID))
401425b1
DS		 561 set_bit(DPC_RESET_HA, &ha->dpc_flags);
562 break;
563
afaf5a2d
DS		 564 case MBOX_ASTS_MAC_ADDRESS_CHANGED:
565 case MBOX_ASTS_DNS:
566 /* No action */
567 DEBUG2(printk(KERN_INFO "scsi%ld: AEN %04x, "
568 "mbox_sts[1]=%04x, mbox_sts[2]=%04x\n",
f4f5df23
VC		 569 ha->host_no, mbox_sts[0],
570 mbox_sts[1], mbox_sts[2]));
afaf5a2d
DS		 571 break;
572
573 case MBOX_ASTS_SELF_TEST_FAILED:
574 case MBOX_ASTS_LOGIN_FAILED:
575 /* No action */
576 DEBUG2(printk("scsi%ld: AEN %04x, mbox_sts[1]=%04x, "
577 "mbox_sts[2]=%04x, mbox_sts[3]=%04x\n",
f4f5df23
VC		 578 ha->host_no, mbox_sts[0], mbox_sts[1],
579 mbox_sts[2], mbox_sts[3]));
afaf5a2d
DS		 580 break;
581
582 case MBOX_ASTS_DATABASE_CHANGED:
583 /* Queue AEN information and process it in the DPC
584 * routine */
585 if (ha->aen_q_count > 0) {
afaf5a2d
DS		 586
587 /* decrement available counter */
588 ha->aen_q_count--;
589
f4f5df23 590 for (i = 0; i < MBOX_AEN_REG_COUNT; i++)
afaf5a2d 591 ha->aen_q[ha->aen_in].mbox_sts[i] =
f4f5df23 592 mbox_sts[i];
afaf5a2d
DS		 593
594 /* print debug message */
595 DEBUG2(printk("scsi%ld: AEN[%d] %04x queued"
f4f5df23
VC		 596 " mb1:0x%x mb2:0x%x mb3:0x%x mb4:0x%x\n",
597 ha->host_no, ha->aen_in, mbox_sts[0],
598 mbox_sts[1], mbox_sts[2], mbox_sts[3],
599 mbox_sts[4]));
600
401425b1
DS		 601 /* advance pointer */
602 ha->aen_in++;
603 if (ha->aen_in == MAX_AEN_ENTRIES)
604 ha->aen_in = 0;
afaf5a2d
DS		 605
606 /* The DPC routine will process the aen */
607 set_bit(DPC_AEN, &ha->dpc_flags);
608 } else {
609 DEBUG2(printk("scsi%ld: %s: aen %04x, queue "
610 "overflowed! AEN LOST!!\n",
611 ha->host_no, __func__,
f4f5df23 612 mbox_sts[0]));
afaf5a2d
DS		 613
614 DEBUG2(printk("scsi%ld: DUMP AEN QUEUE\n",
615 ha->host_no));
616
617 for (i = 0; i < MAX_AEN_ENTRIES; i++) {
618 DEBUG2(printk("AEN[%d] %04x %04x %04x "
f4f5df23
VC		 619 "%04x\n", i, mbox_sts[0],
620 mbox_sts[1], mbox_sts[2],
621 mbox_sts[3]));
afaf5a2d
DS		 622 }
623 }
624 break;
625
6434080b
SS		 626 case MBOX_ASTS_TXSCVR_INSERTED:
627 DEBUG2(printk(KERN_WARNING
628 "scsi%ld: AEN %04x Transceiver"
629 " inserted\n", ha->host_no, mbox_sts[0]));
630 break;
631
632 case MBOX_ASTS_TXSCVR_REMOVED:
633 DEBUG2(printk(KERN_WARNING
634 "scsi%ld: AEN %04x Transceiver"
635 " removed\n", ha->host_no, mbox_sts[0]));
636 break;
637
afaf5a2d
DS		 638 default:
639 DEBUG2(printk(KERN_WARNING
640 "scsi%ld: AEN %04x UNKNOWN\n",
f4f5df23 641 ha->host_no, mbox_sts[0]));
afaf5a2d
DS		 642 break;
643 }
644 } else {
645 DEBUG2(printk("scsi%ld: Unknown mailbox status %08X\n",
646 ha->host_no, mbox_status));
647
648 ha->mbox_status[0] = mbox_status;
649 }
650}
651
f4f5df23
VC		 652/**
653 * qla4_8xxx_interrupt_service_routine - isr
654 * @ha: pointer to host adapter structure.
655 *
656 * This is the main interrupt service routine.
657 * hardware_lock locked upon entry. runs in interrupt context.
658 **/
659void qla4_8xxx_interrupt_service_routine(struct scsi_qla_host *ha,
660 uint32_t intr_status)
661{
662 /* Process response queue interrupt. */
663 if (intr_status & HSRX_RISC_IOCB_INT)
664 qla4xxx_process_response_queue(ha);
665
666 /* Process mailbox/asynch event interrupt.*/
667 if (intr_status & HSRX_RISC_MB_INT)
668 qla4xxx_isr_decode_mailbox(ha,
669 readl(&ha->qla4_8xxx_reg->mailbox_out[0]));
670
671 /* clear the interrupt */
672 writel(0, &ha->qla4_8xxx_reg->host_int);
673 readl(&ha->qla4_8xxx_reg->host_int);
674}
675
afaf5a2d
DS		 676/**
677 * qla4xxx_interrupt_service_routine - isr
678 * @ha: pointer to host adapter structure.
679 *
680 * This is the main interrupt service routine.
681 * hardware_lock locked upon entry. runs in interrupt context.
682 **/
683void qla4xxx_interrupt_service_routine(struct scsi_qla_host * ha,
684 uint32_t intr_status)
685{
686 /* Process response queue interrupt. */
687 if (intr_status & CSR_SCSI_COMPLETION_INTR)
688 qla4xxx_process_response_queue(ha);
689
690 /* Process mailbox/asynch event interrupt.*/
691 if (intr_status & CSR_SCSI_PROCESSOR_INTR) {
692 qla4xxx_isr_decode_mailbox(ha,
693 readl(&ha->reg->mailbox[0]));
694
695 /* Clear Mailbox Interrupt */
696 writel(set_rmask(CSR_SCSI_PROCESSOR_INTR),
697 &ha->reg->ctrl_status);
698 readl(&ha->reg->ctrl_status);
699 }
700}
701
f4f5df23
VC		 702/**
703 * qla4_8xxx_spurious_interrupt - processes spurious interrupt
704 * @ha: pointer to host adapter structure.
705 * @reqs_count: .
706 *
707 **/
708static void qla4_8xxx_spurious_interrupt(struct scsi_qla_host *ha,
709 uint8_t reqs_count)
710{
711 if (reqs_count)
712 return;
713
714 DEBUG2(ql4_printk(KERN_INFO, ha, "Spurious Interrupt\n"));
715 if (is_qla8022(ha)) {
716 writel(0, &ha->qla4_8xxx_reg->host_int);
717 if (test_bit(AF_INTx_ENABLED, &ha->flags))
718 qla4_8xxx_wr_32(ha, ha->nx_legacy_intr.tgt_mask_reg,
719 0xfbff);
720 }
721 ha->spurious_int_count++;
722}
723
afaf5a2d
DS		 724/**
725 * qla4xxx_intr_handler - hardware interrupt handler.
726 * @irq: Unused
727 * @dev_id: Pointer to host adapter structure
afaf5a2d 728 **/
7d12e780 729irqreturn_t qla4xxx_intr_handler(int irq, void *dev_id)
afaf5a2d
DS		 730{
731 struct scsi_qla_host *ha;
732 uint32_t intr_status;
733 unsigned long flags = 0;
734 uint8_t reqs_count = 0;
735
736 ha = (struct scsi_qla_host *) dev_id;
737 if (!ha) {
738 DEBUG2(printk(KERN_INFO
739 "qla4xxx: Interrupt with NULL host ptr\n"));
740 return IRQ_NONE;
741 }
742
743 spin_lock_irqsave(&ha->hardware_lock, flags);
744
d915058f 745 ha->isr_count++;
afaf5a2d
DS		 746 /*
747 * Repeatedly service interrupts up to a maximum of
748 * MAX_REQS_SERVICED_PER_INTR
749 */
750 while (1) {
751 /*
752 * Read interrupt status
753 */
f4f5df23 754 if (ha->isp_ops->rd_shdw_rsp_q_in(ha) !=
afaf5a2d
DS		 755 ha->response_out)
756 intr_status = CSR_SCSI_COMPLETION_INTR;
757 else
758 intr_status = readl(&ha->reg->ctrl_status);
759
760 if ((intr_status &
f4f5df23 761 (CSR_SCSI_RESET_INTR|CSR_FATAL_ERROR|INTR_PENDING)) == 0) {
afaf5a2d
DS		 762 if (reqs_count == 0)
763 ha->spurious_int_count++;
764 break;
765 }
766
767 if (intr_status & CSR_FATAL_ERROR) {
768 DEBUG2(printk(KERN_INFO "scsi%ld: Fatal Error, "
769 "Status 0x%04x\n", ha->host_no,
770 readl(isp_port_error_status (ha))));
771
772 /* Issue Soft Reset to clear this error condition.
773 * This will prevent the RISC from repeatedly
774 * interrupting the driver; thus, allowing the DPC to
775 * get scheduled to continue error recovery.
776 * NOTE: Disabling RISC interrupts does not work in
777 * this case, as CSR_FATAL_ERROR overrides
778 * CSR_SCSI_INTR_ENABLE */
779 if ((readl(&ha->reg->ctrl_status) &
780 CSR_SCSI_RESET_INTR) == 0) {
781 writel(set_rmask(CSR_SOFT_RESET),
782 &ha->reg->ctrl_status);
783 readl(&ha->reg->ctrl_status);
784 }
785
786 writel(set_rmask(CSR_FATAL_ERROR),
787 &ha->reg->ctrl_status);
788 readl(&ha->reg->ctrl_status);
789
790 __qla4xxx_disable_intrs(ha);
791
792 set_bit(DPC_RESET_HA, &ha->dpc_flags);
793
794 break;
795 } else if (intr_status & CSR_SCSI_RESET_INTR) {
796 clear_bit(AF_ONLINE, &ha->flags);
797 __qla4xxx_disable_intrs(ha);
798
799 writel(set_rmask(CSR_SCSI_RESET_INTR),
800 &ha->reg->ctrl_status);
801 readl(&ha->reg->ctrl_status);
802
f4f5df23 803 if (!test_bit(AF_HBA_GOING_AWAY, &ha->flags))
477ffb9d 804 set_bit(DPC_RESET_HA_INTR, &ha->dpc_flags);
afaf5a2d
DS		 805
806 break;
807 } else if (intr_status & INTR_PENDING) {
f4f5df23 808 ha->isp_ops->interrupt_service_routine(ha, intr_status);
afaf5a2d
DS		 809 ha->total_io_count++;
810 if (++reqs_count == MAX_REQS_SERVICED_PER_INTR)
811 break;
f4f5df23
VC		 812 }
813 }
814
815 spin_unlock_irqrestore(&ha->hardware_lock, flags);
816
817 return IRQ_HANDLED;
818}
819
820/**
821 * qla4_8xxx_intr_handler - hardware interrupt handler.
822 * @irq: Unused
823 * @dev_id: Pointer to host adapter structure
824 **/
825irqreturn_t qla4_8xxx_intr_handler(int irq, void *dev_id)
826{
827 struct scsi_qla_host *ha = dev_id;
828 uint32_t intr_status;
829 uint32_t status;
830 unsigned long flags = 0;
831 uint8_t reqs_count = 0;
832
2232be0d
LC		 833 if (unlikely(pci_channel_offline(ha->pdev)))
834 return IRQ_HANDLED;
835
f4f5df23
VC		 836 ha->isr_count++;
837 status = qla4_8xxx_rd_32(ha, ISR_INT_VECTOR);
838 if (!(status & ha->nx_legacy_intr.int_vec_bit))
839 return IRQ_NONE;
840
841 status = qla4_8xxx_rd_32(ha, ISR_INT_STATE_REG);
842 if (!ISR_IS_LEGACY_INTR_TRIGGERED(status)) {
843 DEBUG2(ql4_printk(KERN_INFO, ha,
844 "%s legacy Int not triggered\n", __func__));
845 return IRQ_NONE;
846 }
847
848 /* clear the interrupt */
849 qla4_8xxx_wr_32(ha, ha->nx_legacy_intr.tgt_status_reg, 0xffffffff);
850
851 /* read twice to ensure write is flushed */
852 qla4_8xxx_rd_32(ha, ISR_INT_VECTOR);
853 qla4_8xxx_rd_32(ha, ISR_INT_VECTOR);
854
855 spin_lock_irqsave(&ha->hardware_lock, flags);
856 while (1) {
857 if (!(readl(&ha->qla4_8xxx_reg->host_int) &
858 ISRX_82XX_RISC_INT)) {
859 qla4_8xxx_spurious_interrupt(ha, reqs_count);
860 break;
861 }
862 intr_status = readl(&ha->qla4_8xxx_reg->host_status);
863 if ((intr_status &
864 (HSRX_RISC_MB_INT | HSRX_RISC_IOCB_INT)) == 0) {
865 qla4_8xxx_spurious_interrupt(ha, reqs_count);
866 break;
867 }
868
869 ha->isp_ops->interrupt_service_routine(ha, intr_status);
870
871 /* Enable Interrupt */
872 qla4_8xxx_wr_32(ha, ha->nx_legacy_intr.tgt_mask_reg, 0xfbff);
afaf5a2d 873
f4f5df23
VC		 874 if (++reqs_count == MAX_REQS_SERVICED_PER_INTR)
875 break;
876 }
877
878 spin_unlock_irqrestore(&ha->hardware_lock, flags);
879 return IRQ_HANDLED;
880}
881
882irqreturn_t
883qla4_8xxx_msi_handler(int irq, void *dev_id)
884{
885 struct scsi_qla_host *ha;
886
887 ha = (struct scsi_qla_host *) dev_id;
888 if (!ha) {
889 DEBUG2(printk(KERN_INFO
890 "qla4xxx: MSIX: Interrupt with NULL host ptr\n"));
891 return IRQ_NONE;
892 }
893
894 ha->isr_count++;
895 /* clear the interrupt */
896 qla4_8xxx_wr_32(ha, ha->nx_legacy_intr.tgt_status_reg, 0xffffffff);
897
898 /* read twice to ensure write is flushed */
899 qla4_8xxx_rd_32(ha, ISR_INT_VECTOR);
900 qla4_8xxx_rd_32(ha, ISR_INT_VECTOR);
901
902 return qla4_8xxx_default_intr_handler(irq, dev_id);
903}
904
905/**
906 * qla4_8xxx_default_intr_handler - hardware interrupt handler.
907 * @irq: Unused
908 * @dev_id: Pointer to host adapter structure
909 *
910 * This interrupt handler is called directly for MSI-X, and
911 * called indirectly for MSI.
912 **/
913irqreturn_t
914qla4_8xxx_default_intr_handler(int irq, void *dev_id)
915{
916 struct scsi_qla_host *ha = dev_id;
917 unsigned long flags;
918 uint32_t intr_status;
919 uint8_t reqs_count = 0;
920
921 spin_lock_irqsave(&ha->hardware_lock, flags);
922 while (1) {
923 if (!(readl(&ha->qla4_8xxx_reg->host_int) &
924 ISRX_82XX_RISC_INT)) {
925 qla4_8xxx_spurious_interrupt(ha, reqs_count);
926 break;
927 }
928
929 intr_status = readl(&ha->qla4_8xxx_reg->host_status);
930 if ((intr_status &
931 (HSRX_RISC_MB_INT | HSRX_RISC_IOCB_INT)) == 0) {
932 qla4_8xxx_spurious_interrupt(ha, reqs_count);
933 break;
afaf5a2d 934 }
f4f5df23
VC		 935
936 ha->isp_ops->interrupt_service_routine(ha, intr_status);
937
938 if (++reqs_count == MAX_REQS_SERVICED_PER_INTR)
939 break;
afaf5a2d
DS		 940 }
941
f4f5df23 942 ha->isr_count++;
afaf5a2d 943 spin_unlock_irqrestore(&ha->hardware_lock, flags);
f4f5df23
VC		 944 return IRQ_HANDLED;
945}
afaf5a2d 946
f4f5df23
VC		 947irqreturn_t
948qla4_8xxx_msix_rsp_q(int irq, void *dev_id)
949{
950 struct scsi_qla_host *ha = dev_id;
951 unsigned long flags;
952
953 spin_lock_irqsave(&ha->hardware_lock, flags);
954 qla4xxx_process_response_queue(ha);
955 writel(0, &ha->qla4_8xxx_reg->host_int);
956 spin_unlock_irqrestore(&ha->hardware_lock, flags);
957
958 ha->isr_count++;
afaf5a2d
DS		 959 return IRQ_HANDLED;
960}
961
962/**
963 * qla4xxx_process_aen - processes AENs generated by firmware
964 * @ha: pointer to host adapter structure.
965 * @process_aen: type of AENs to process
966 *
967 * Processes specific types of Asynchronous Events generated by firmware.
968 * The type of AENs to process is specified by process_aen and can be
969 * PROCESS_ALL_AENS 0
970 * FLUSH_DDB_CHANGED_AENS 1
971 * RELOGIN_DDB_CHANGED_AENS 2
972 **/
973void qla4xxx_process_aen(struct scsi_qla_host * ha, uint8_t process_aen)
974{
975 uint32_t mbox_sts[MBOX_AEN_REG_COUNT];
976 struct aen *aen;
977 int i;
978 unsigned long flags;
979
980 spin_lock_irqsave(&ha->hardware_lock, flags);
981 while (ha->aen_out != ha->aen_in) {
afaf5a2d 982 aen = &ha->aen_q[ha->aen_out];
afaf5a2d
DS		 983 /* copy aen information to local structure */
984 for (i = 0; i < MBOX_AEN_REG_COUNT; i++)
985 mbox_sts[i] = aen->mbox_sts[i];
986
401425b1
DS		 987 ha->aen_q_count++;
988 ha->aen_out++;
989
990 if (ha->aen_out == MAX_AEN_ENTRIES)
991 ha->aen_out = 0;
992
afaf5a2d
DS		 993 spin_unlock_irqrestore(&ha->hardware_lock, flags);
994
401425b1
DS		 995 DEBUG2(printk("qla4xxx(%ld): AEN[%d]=0x%08x, mbx1=0x%08x mbx2=0x%08x"
996 " mbx3=0x%08x mbx4=0x%08x\n", ha->host_no,
997 (ha->aen_out ? (ha->aen_out-1): (MAX_AEN_ENTRIES-1)),
998 mbox_sts[0], mbox_sts[1], mbox_sts[2],
999 mbox_sts[3], mbox_sts[4]));
afaf5a2d
DS		 1000
1001 switch (mbox_sts[0]) {
1002 case MBOX_ASTS_DATABASE_CHANGED:
1003 if (process_aen == FLUSH_DDB_CHANGED_AENS) {
1004 DEBUG2(printk("scsi%ld: AEN[%d] %04x, index "
1005 "[%d] state=%04x FLUSHED!\n",
1006 ha->host_no, ha->aen_out,
1007 mbox_sts[0], mbox_sts[2],
1008 mbox_sts[3]));
1009 break;
1010 } else if (process_aen == RELOGIN_DDB_CHANGED_AENS) {
1011 /* for use during init time, we only want to
1012 * relogin non-active ddbs */
1013 struct ddb_entry *ddb_entry;
1014
1015 ddb_entry =
1016 /* FIXME: name length? */
1017 qla4xxx_lookup_ddb_by_fw_index(ha,
1018 mbox_sts[2]);
1019 if (!ddb_entry)
1020 break;
1021
1022 ddb_entry->dev_scan_wait_to_complete_relogin =
1023 0;
1024 ddb_entry->dev_scan_wait_to_start_relogin =
1025 jiffies +
1026 ((ddb_entry->default_time2wait +
1027 4) * HZ);
1028
f4f5df23 1029 DEBUG2(printk("scsi%ld: ddb [%d] initate"
afaf5a2d
DS		 1030 " RELOGIN after %d seconds\n",
1031 ha->host_no,
1032 ddb_entry->fw_ddb_index,
1033 ddb_entry->default_time2wait +
1034 4));
1035 break;
1036 }
1037
1038 if (mbox_sts[1] == 0) { /* Global DB change. */
1039 qla4xxx_reinitialize_ddb_list(ha);
1040 } else if (mbox_sts[1] == 1) { /* Specific device. */
1041 qla4xxx_process_ddb_changed(ha, mbox_sts[2],
821d6e54 1042 mbox_sts[3], mbox_sts[4]);
afaf5a2d
DS		 1043 }
1044 break;
1045 }
1046 spin_lock_irqsave(&ha->hardware_lock, flags);
1047 }
1048 spin_unlock_irqrestore(&ha->hardware_lock, flags);
afaf5a2d
DS		 1049}
1050
f4f5df23
VC		 1051int qla4xxx_request_irqs(struct scsi_qla_host *ha)
1052{
1053 int ret;
1054
1055 if (!is_qla8022(ha))
1056 goto try_intx;
1057
1058 if (ql4xenablemsix == 2)
1059 goto try_msi;
1060
1061 if (ql4xenablemsix == 0 || ql4xenablemsix != 1)
1062 goto try_intx;
1063
1064 /* Trying MSI-X */
1065 ret = qla4_8xxx_enable_msix(ha);
1066 if (!ret) {
1067 DEBUG2(ql4_printk(KERN_INFO, ha,
1068 "MSI-X: Enabled (0x%X).\n", ha->revision_id));
1069 goto irq_attached;
1070 }
1071
1072 ql4_printk(KERN_WARNING, ha,
1073 "MSI-X: Falling back-to MSI mode -- %d.\n", ret);
1074
1075try_msi:
1076 /* Trying MSI */
1077 ret = pci_enable_msi(ha->pdev);
1078 if (!ret) {
1079 ret = request_irq(ha->pdev->irq, qla4_8xxx_msi_handler,
1080 IRQF_DISABLED|IRQF_SHARED, DRIVER_NAME, ha);
1081 if (!ret) {
1082 DEBUG2(ql4_printk(KERN_INFO, ha, "MSI: Enabled.\n"));
1083 set_bit(AF_MSI_ENABLED, &ha->flags);
1084 goto irq_attached;
1085 } else {
1086 ql4_printk(KERN_WARNING, ha,
1087 "MSI: Failed to reserve interrupt %d "
1088 "already in use.\n", ha->pdev->irq);
1089 pci_disable_msi(ha->pdev);
1090 }
1091 }
1092 ql4_printk(KERN_WARNING, ha,
1093 "MSI: Falling back-to INTx mode -- %d.\n", ret);
1094
1095try_intx:
1096 /* Trying INTx */
1097 ret = request_irq(ha->pdev->irq, ha->isp_ops->intr_handler,
1098 IRQF_DISABLED|IRQF_SHARED, DRIVER_NAME, ha);
1099 if (!ret) {
1100 DEBUG2(ql4_printk(KERN_INFO, ha, "INTx: Enabled.\n"));
1101 set_bit(AF_INTx_ENABLED, &ha->flags);
1102 goto irq_attached;
1103
1104 } else {
1105 ql4_printk(KERN_WARNING, ha,
1106 "INTx: Failed to reserve interrupt %d already in"
1107 " use.\n", ha->pdev->irq);
1108 return ret;
1109 }
1110
1111irq_attached:
1112 set_bit(AF_IRQ_ATTACHED, &ha->flags);
1113 ha->host->irq = ha->pdev->irq;
1114 ql4_printk(KERN_INFO, ha, "%s: irq %d attached\n",
1115 __func__, ha->pdev->irq);
1116 return ret;
1117}
1118
1119void qla4xxx_free_irqs(struct scsi_qla_host *ha)
1120{
1121 if (test_bit(AF_MSIX_ENABLED, &ha->flags))
1122 qla4_8xxx_disable_msix(ha);
1123 else if (test_and_clear_bit(AF_MSI_ENABLED, &ha->flags)) {
1124 free_irq(ha->pdev->irq, ha);
1125 pci_disable_msi(ha->pdev);
1126 } else if (test_and_clear_bit(AF_INTx_ENABLED, &ha->flags))
1127 free_irq(ha->pdev->irq, ha);
1128}
Clone of davem's net-next-2.6 tree