Merge git://git.skbuff.net/gitroot/yoshfuji/linux-2.6.14+advapi-fix/
[linux-2.6] / drivers / scsi / qla2xxx / qla_isr.c
1 /*
2  * QLogic Fibre Channel HBA Driver
3  * Copyright (c)  2003-2005 QLogic Corporation
4  *
5  * See LICENSE.qla2xxx for copyright and licensing details.
6  */
7 #include "qla_def.h"
8
9 static void qla2x00_mbx_completion(scsi_qla_host_t *, uint16_t);
10 static void qla2x00_async_event(scsi_qla_host_t *, uint16_t *);
11 static void qla2x00_process_completed_request(struct scsi_qla_host *, uint32_t);
12 static void qla2x00_status_entry(scsi_qla_host_t *, void *);
13 static void qla2x00_status_cont_entry(scsi_qla_host_t *, sts_cont_entry_t *);
14 static void qla2x00_error_entry(scsi_qla_host_t *, sts_entry_t *);
15 static void qla2x00_ms_entry(scsi_qla_host_t *, ms_iocb_entry_t *);
16
17 static void qla24xx_ms_entry(scsi_qla_host_t *, struct ct_entry_24xx *);
18
19 /**
20  * qla2100_intr_handler() - Process interrupts for the ISP2100 and ISP2200.
21  * @irq:
22  * @dev_id: SCSI driver HA context
23  * @regs:
24  *
25  * Called by system whenever the host adapter generates an interrupt.
26  *
27  * Returns handled flag.
28  */
29 irqreturn_t
30 qla2100_intr_handler(int irq, void *dev_id, struct pt_regs *regs)
31 {
32         scsi_qla_host_t *ha;
33         struct device_reg_2xxx __iomem *reg;
34         int             status;
35         unsigned long   flags;
36         unsigned long   iter;
37         uint16_t        mb[4];
38
39         ha = (scsi_qla_host_t *) dev_id;
40         if (!ha) {
41                 printk(KERN_INFO
42                     "%s(): NULL host pointer\n", __func__);
43                 return (IRQ_NONE);
44         }
45
46         reg = &ha->iobase->isp;
47         status = 0;
48
49         spin_lock_irqsave(&ha->hardware_lock, flags);
50         for (iter = 50; iter--; ) {
51                 if ((RD_REG_WORD(&reg->istatus) & ISR_RISC_INT) == 0)
52                         break;
53
54                 if (RD_REG_WORD(&reg->semaphore) & BIT_0) {
55                         WRT_REG_WORD(&reg->hccr, HCCR_CLR_RISC_INT);
56                         RD_REG_WORD(&reg->hccr);
57
58                         /* Get mailbox data. */
59                         mb[0] = RD_MAILBOX_REG(ha, reg, 0);
60                         if (mb[0] > 0x3fff && mb[0] < 0x8000) {
61                                 qla2x00_mbx_completion(ha, mb[0]);
62                                 status |= MBX_INTERRUPT;
63                         } else if (mb[0] > 0x7fff && mb[0] < 0xc000) {
64                                 mb[1] = RD_MAILBOX_REG(ha, reg, 1);
65                                 mb[2] = RD_MAILBOX_REG(ha, reg, 2);
66                                 mb[3] = RD_MAILBOX_REG(ha, reg, 3);
67                                 qla2x00_async_event(ha, mb);
68                         } else {
69                                 /*EMPTY*/
70                                 DEBUG2(printk("scsi(%ld): Unrecognized "
71                                     "interrupt type (%d).\n",
72                                     ha->host_no, mb[0]));
73                         }
74                         /* Release mailbox registers. */
75                         WRT_REG_WORD(&reg->semaphore, 0);
76                         RD_REG_WORD(&reg->semaphore);
77                 } else {
78                         qla2x00_process_response_queue(ha);
79
80                         WRT_REG_WORD(&reg->hccr, HCCR_CLR_RISC_INT);
81                         RD_REG_WORD(&reg->hccr);
82                 }
83         }
84         spin_unlock_irqrestore(&ha->hardware_lock, flags);
85
86         if (test_bit(MBX_INTR_WAIT, &ha->mbx_cmd_flags) &&
87             (status & MBX_INTERRUPT) && ha->flags.mbox_int) {
88                 spin_lock_irqsave(&ha->mbx_reg_lock, flags);
89
90                 set_bit(MBX_INTERRUPT, &ha->mbx_cmd_flags);
91                 up(&ha->mbx_intr_sem);
92
93                 spin_unlock_irqrestore(&ha->mbx_reg_lock, flags);
94         }
95
96         return (IRQ_HANDLED);
97 }
98
99 /**
100  * qla2300_intr_handler() - Process interrupts for the ISP23xx and ISP63xx.
101  * @irq:
102  * @dev_id: SCSI driver HA context
103  * @regs:
104  *
105  * Called by system whenever the host adapter generates an interrupt.
106  *
107  * Returns handled flag.
108  */
109 irqreturn_t
110 qla2300_intr_handler(int irq, void *dev_id, struct pt_regs *regs)
111 {
112         scsi_qla_host_t *ha;
113         struct device_reg_2xxx __iomem *reg;
114         int             status;
115         unsigned long   flags;
116         unsigned long   iter;
117         uint32_t        stat;
118         uint16_t        hccr;
119         uint16_t        mb[4];
120
121         ha = (scsi_qla_host_t *) dev_id;
122         if (!ha) {
123                 printk(KERN_INFO
124                     "%s(): NULL host pointer\n", __func__);
125                 return (IRQ_NONE);
126         }
127
128         reg = &ha->iobase->isp;
129         status = 0;
130
131         spin_lock_irqsave(&ha->hardware_lock, flags);
132         for (iter = 50; iter--; ) {
133                 stat = RD_REG_DWORD(&reg->u.isp2300.host_status);
134                 if (stat & HSR_RISC_PAUSED) {
135                         hccr = RD_REG_WORD(&reg->hccr);
136                         if (hccr & (BIT_15 | BIT_13 | BIT_11 | BIT_8))
137                                 qla_printk(KERN_INFO, ha,
138                                     "Parity error -- HCCR=%x.\n", hccr);
139                         else
140                                 qla_printk(KERN_INFO, ha,
141                                     "RISC paused -- HCCR=%x.\n", hccr);
142
143                         /*
144                          * Issue a "HARD" reset in order for the RISC
145                          * interrupt bit to be cleared.  Schedule a big
146                          * hammmer to get out of the RISC PAUSED state.
147                          */
148                         WRT_REG_WORD(&reg->hccr, HCCR_RESET_RISC);
149                         RD_REG_WORD(&reg->hccr);
150                         set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
151                         break;
152                 } else if ((stat & HSR_RISC_INT) == 0)
153                         break;
154
155                 switch (stat & 0xff) {
156                 case 0x1:
157                 case 0x2:
158                 case 0x10:
159                 case 0x11:
160                         qla2x00_mbx_completion(ha, MSW(stat));
161                         status |= MBX_INTERRUPT;
162
163                         /* Release mailbox registers. */
164                         WRT_REG_WORD(&reg->semaphore, 0);
165                         break;
166                 case 0x12:
167                         mb[0] = MSW(stat);
168                         mb[1] = RD_MAILBOX_REG(ha, reg, 1);
169                         mb[2] = RD_MAILBOX_REG(ha, reg, 2);
170                         mb[3] = RD_MAILBOX_REG(ha, reg, 3);
171                         qla2x00_async_event(ha, mb);
172                         break;
173                 case 0x13:
174                         qla2x00_process_response_queue(ha);
175                         break;
176                 case 0x15:
177                         mb[0] = MBA_CMPLT_1_16BIT;
178                         mb[1] = MSW(stat);
179                         qla2x00_async_event(ha, mb);
180                         break;
181                 case 0x16:
182                         mb[0] = MBA_SCSI_COMPLETION;
183                         mb[1] = MSW(stat);
184                         mb[2] = RD_MAILBOX_REG(ha, reg, 2);
185                         qla2x00_async_event(ha, mb);
186                         break;
187                 default:
188                         DEBUG2(printk("scsi(%ld): Unrecognized interrupt type "
189                             "(%d).\n",
190                             ha->host_no, stat & 0xff));
191                         break;
192                 }
193                 WRT_REG_WORD(&reg->hccr, HCCR_CLR_RISC_INT);
194                 RD_REG_WORD_RELAXED(&reg->hccr);
195         }
196         spin_unlock_irqrestore(&ha->hardware_lock, flags);
197
198         if (test_bit(MBX_INTR_WAIT, &ha->mbx_cmd_flags) &&
199             (status & MBX_INTERRUPT) && ha->flags.mbox_int) {
200                 spin_lock_irqsave(&ha->mbx_reg_lock, flags);
201
202                 set_bit(MBX_INTERRUPT, &ha->mbx_cmd_flags);
203                 up(&ha->mbx_intr_sem);
204
205                 spin_unlock_irqrestore(&ha->mbx_reg_lock, flags);
206         }
207
208         return (IRQ_HANDLED);
209 }
210
211 /**
212  * qla2x00_mbx_completion() - Process mailbox command completions.
213  * @ha: SCSI driver HA context
214  * @mb0: Mailbox0 register
215  */
216 static void
217 qla2x00_mbx_completion(scsi_qla_host_t *ha, uint16_t mb0)
218 {
219         uint16_t        cnt;
220         uint16_t __iomem *wptr;
221         struct device_reg_2xxx __iomem *reg = &ha->iobase->isp;
222
223         /* Load return mailbox registers. */
224         ha->flags.mbox_int = 1;
225         ha->mailbox_out[0] = mb0;
226         wptr = (uint16_t __iomem *)MAILBOX_REG(ha, reg, 1);
227
228         for (cnt = 1; cnt < ha->mbx_count; cnt++) {
229                 if (IS_QLA2200(ha) && cnt == 8)
230                         wptr = (uint16_t __iomem *)MAILBOX_REG(ha, reg, 8);
231                 if (cnt == 4 || cnt == 5)
232                         ha->mailbox_out[cnt] = qla2x00_debounce_register(wptr);
233                 else
234                         ha->mailbox_out[cnt] = RD_REG_WORD(wptr);
235
236                 wptr++;
237         }
238
239         if (ha->mcp) {
240                 DEBUG3(printk("%s(%ld): Got mailbox completion. cmd=%x.\n",
241                     __func__, ha->host_no, ha->mcp->mb[0]));
242         } else {
243                 DEBUG2_3(printk("%s(%ld): MBX pointer ERROR!\n",
244                     __func__, ha->host_no));
245         }
246 }
247
248 /**
249  * qla2x00_async_event() - Process aynchronous events.
250  * @ha: SCSI driver HA context
251  * @mb: Mailbox registers (0 - 3)
252  */
253 static void
254 qla2x00_async_event(scsi_qla_host_t *ha, uint16_t *mb)
255 {
256 #define LS_UNKNOWN      2
257         static char     *link_speeds[5] = { "1", "2", "?", "4", "10" };
258         char            *link_speed;
259         uint16_t        handle_cnt;
260         uint16_t        cnt;
261         uint32_t        handles[5];
262         struct device_reg_2xxx __iomem *reg = &ha->iobase->isp;
263         uint32_t        rscn_entry, host_pid;
264         uint8_t         rscn_queue_index;
265
266         /* Setup to process RIO completion. */
267         handle_cnt = 0;
268         switch (mb[0]) {
269         case MBA_SCSI_COMPLETION:
270                 handles[0] = le32_to_cpu((uint32_t)((mb[2] << 16) | mb[1]));
271                 handle_cnt = 1;
272                 break;
273         case MBA_CMPLT_1_16BIT:
274                 handles[0] = mb[1];
275                 handle_cnt = 1;
276                 mb[0] = MBA_SCSI_COMPLETION;
277                 break;
278         case MBA_CMPLT_2_16BIT:
279                 handles[0] = mb[1];
280                 handles[1] = mb[2];
281                 handle_cnt = 2;
282                 mb[0] = MBA_SCSI_COMPLETION;
283                 break;
284         case MBA_CMPLT_3_16BIT:
285                 handles[0] = mb[1];
286                 handles[1] = mb[2];
287                 handles[2] = mb[3];
288                 handle_cnt = 3;
289                 mb[0] = MBA_SCSI_COMPLETION;
290                 break;
291         case MBA_CMPLT_4_16BIT:
292                 handles[0] = mb[1];
293                 handles[1] = mb[2];
294                 handles[2] = mb[3];
295                 handles[3] = (uint32_t)RD_MAILBOX_REG(ha, reg, 6);
296                 handle_cnt = 4;
297                 mb[0] = MBA_SCSI_COMPLETION;
298                 break;
299         case MBA_CMPLT_5_16BIT:
300                 handles[0] = mb[1];
301                 handles[1] = mb[2];
302                 handles[2] = mb[3];
303                 handles[3] = (uint32_t)RD_MAILBOX_REG(ha, reg, 6);
304                 handles[4] = (uint32_t)RD_MAILBOX_REG(ha, reg, 7);
305                 handle_cnt = 5;
306                 mb[0] = MBA_SCSI_COMPLETION;
307                 break;
308         case MBA_CMPLT_2_32BIT:
309                 handles[0] = le32_to_cpu((uint32_t)((mb[2] << 16) | mb[1]));
310                 handles[1] = le32_to_cpu(
311                     ((uint32_t)(RD_MAILBOX_REG(ha, reg, 7) << 16)) |
312                     RD_MAILBOX_REG(ha, reg, 6));
313                 handle_cnt = 2;
314                 mb[0] = MBA_SCSI_COMPLETION;
315                 break;
316         default:
317                 break;
318         }
319
320         switch (mb[0]) {
321         case MBA_SCSI_COMPLETION:       /* Fast Post */
322                 if (!ha->flags.online)
323                         break;
324
325                 for (cnt = 0; cnt < handle_cnt; cnt++)
326                         qla2x00_process_completed_request(ha, handles[cnt]);
327                 break;
328
329         case MBA_RESET:                 /* Reset */
330                 DEBUG2(printk("scsi(%ld): Asynchronous RESET.\n", ha->host_no));
331
332                 set_bit(RESET_MARKER_NEEDED, &ha->dpc_flags);
333                 break;
334
335         case MBA_SYSTEM_ERR:            /* System Error */
336                 mb[1] = RD_MAILBOX_REG(ha, reg, 1);
337                 mb[2] = RD_MAILBOX_REG(ha, reg, 2);
338                 mb[3] = RD_MAILBOX_REG(ha, reg, 3);
339
340                 qla_printk(KERN_INFO, ha,
341                     "ISP System Error - mbx1=%xh mbx2=%xh mbx3=%xh.\n",
342                     mb[1], mb[2], mb[3]);
343
344                 ha->isp_ops.fw_dump(ha, 1);
345
346                 if (IS_QLA24XX(ha) || IS_QLA25XX(ha)) {
347                         if (mb[1] == 0 && mb[2] == 0) {
348                                 qla_printk(KERN_ERR, ha,
349                                     "Unrecoverable Hardware Error: adapter "
350                                     "marked OFFLINE!\n");
351                                 ha->flags.online = 0;
352                         } else
353                                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
354                 } else if (mb[1] == 0) {
355                         qla_printk(KERN_INFO, ha,
356                             "Unrecoverable Hardware Error: adapter marked "
357                             "OFFLINE!\n");
358                         ha->flags.online = 0;
359                 } else
360                         set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
361                 break;
362
363         case MBA_REQ_TRANSFER_ERR:      /* Request Transfer Error */
364                 DEBUG2(printk("scsi(%ld): ISP Request Transfer Error.\n",
365                     ha->host_no));
366                 qla_printk(KERN_WARNING, ha, "ISP Request Transfer Error.\n");
367
368                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
369                 break;
370
371         case MBA_RSP_TRANSFER_ERR:      /* Response Transfer Error */
372                 DEBUG2(printk("scsi(%ld): ISP Response Transfer Error.\n",
373                     ha->host_no));
374                 qla_printk(KERN_WARNING, ha, "ISP Response Transfer Error.\n");
375
376                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
377                 break;
378
379         case MBA_WAKEUP_THRES:          /* Request Queue Wake-up */
380                 DEBUG2(printk("scsi(%ld): Asynchronous WAKEUP_THRES.\n",
381                     ha->host_no));
382                 break;
383
384         case MBA_LIP_OCCURRED:          /* Loop Initialization Procedure */
385                 DEBUG2(printk("scsi(%ld): LIP occured (%x).\n", ha->host_no,
386                     mb[1]));
387                 qla_printk(KERN_INFO, ha, "LIP occured (%x).\n", mb[1]);
388
389                 if (atomic_read(&ha->loop_state) != LOOP_DOWN) {
390                         atomic_set(&ha->loop_state, LOOP_DOWN);
391                         atomic_set(&ha->loop_down_timer, LOOP_DOWN_TIME);
392                         qla2x00_mark_all_devices_lost(ha);
393                 }
394
395                 set_bit(REGISTER_FC4_NEEDED, &ha->dpc_flags);
396
397                 ha->flags.management_server_logged_in = 0;
398
399                 /* Update AEN queue. */
400                 qla2x00_enqueue_aen(ha, MBA_LIP_OCCURRED, NULL);
401
402                 break;
403
404         case MBA_LOOP_UP:               /* Loop Up Event */
405                 ha->link_data_rate = 0;
406                 if (IS_QLA2100(ha) || IS_QLA2200(ha)) {
407                         link_speed = link_speeds[0];
408                 } else {
409                         link_speed = link_speeds[LS_UNKNOWN];
410                         if (mb[1] < 5)
411                                 link_speed = link_speeds[mb[1]];
412                         ha->link_data_rate = mb[1];
413                 }
414
415                 DEBUG2(printk("scsi(%ld): Asynchronous LOOP UP (%s Gbps).\n",
416                     ha->host_no, link_speed));
417                 qla_printk(KERN_INFO, ha, "LOOP UP detected (%s Gbps).\n",
418                     link_speed);
419
420                 ha->flags.management_server_logged_in = 0;
421
422                 /* Update AEN queue. */
423                 qla2x00_enqueue_aen(ha, MBA_LOOP_UP, NULL);
424                 break;
425
426         case MBA_LOOP_DOWN:             /* Loop Down Event */
427                 DEBUG2(printk("scsi(%ld): Asynchronous LOOP DOWN (%x).\n",
428                     ha->host_no, mb[1]));
429                 qla_printk(KERN_INFO, ha, "LOOP DOWN detected (%x).\n", mb[1]);
430
431                 if (atomic_read(&ha->loop_state) != LOOP_DOWN) {
432                         atomic_set(&ha->loop_state, LOOP_DOWN);
433                         atomic_set(&ha->loop_down_timer, LOOP_DOWN_TIME);
434                         ha->device_flags |= DFLG_NO_CABLE;
435                         qla2x00_mark_all_devices_lost(ha);
436                 }
437
438                 ha->flags.management_server_logged_in = 0;
439                 ha->link_data_rate = 0;
440                 if (ql2xfdmienable)
441                         set_bit(REGISTER_FDMI_NEEDED, &ha->dpc_flags);
442
443                 /* Update AEN queue. */
444                 qla2x00_enqueue_aen(ha, MBA_LOOP_DOWN, NULL);
445                 break;
446
447         case MBA_LIP_RESET:             /* LIP reset occurred */
448                 DEBUG2(printk("scsi(%ld): Asynchronous LIP RESET (%x).\n",
449                     ha->host_no, mb[1]));
450                 qla_printk(KERN_INFO, ha,
451                     "LIP reset occured (%x).\n", mb[1]);
452
453                 if (atomic_read(&ha->loop_state) != LOOP_DOWN) {
454                         atomic_set(&ha->loop_state, LOOP_DOWN);
455                         atomic_set(&ha->loop_down_timer, LOOP_DOWN_TIME);
456                         qla2x00_mark_all_devices_lost(ha);
457                 }
458
459                 set_bit(RESET_MARKER_NEEDED, &ha->dpc_flags);
460
461                 ha->operating_mode = LOOP;
462                 ha->flags.management_server_logged_in = 0;
463
464                 /* Update AEN queue. */
465                 qla2x00_enqueue_aen(ha, MBA_LIP_RESET, NULL);
466
467                 break;
468
469         case MBA_POINT_TO_POINT:        /* Point-to-Point */
470                 if (IS_QLA2100(ha))
471                         break;
472
473                 DEBUG2(printk("scsi(%ld): Asynchronous P2P MODE received.\n",
474                     ha->host_no));
475
476                 /*
477                  * Until there's a transition from loop down to loop up, treat
478                  * this as loop down only.
479                  */
480                 if (atomic_read(&ha->loop_state) != LOOP_DOWN) {
481                         atomic_set(&ha->loop_state, LOOP_DOWN);
482                         if (!atomic_read(&ha->loop_down_timer))
483                                 atomic_set(&ha->loop_down_timer,
484                                     LOOP_DOWN_TIME);
485                         qla2x00_mark_all_devices_lost(ha);
486                 }
487
488                 if (!(test_bit(ABORT_ISP_ACTIVE, &ha->dpc_flags))) {
489                         set_bit(RESET_MARKER_NEEDED, &ha->dpc_flags);
490                 }
491                 set_bit(REGISTER_FC4_NEEDED, &ha->dpc_flags);
492                 break;
493
494         case MBA_CHG_IN_CONNECTION:     /* Change in connection mode */
495                 if (IS_QLA2100(ha))
496                         break;
497
498                 DEBUG2(printk("scsi(%ld): Asynchronous Change In Connection "
499                     "received.\n",
500                     ha->host_no));
501                 qla_printk(KERN_INFO, ha,
502                     "Configuration change detected: value=%x.\n", mb[1]);
503
504                 if (atomic_read(&ha->loop_state) != LOOP_DOWN) {
505                         atomic_set(&ha->loop_state, LOOP_DOWN);
506                         if (!atomic_read(&ha->loop_down_timer))
507                                 atomic_set(&ha->loop_down_timer,
508                                     LOOP_DOWN_TIME);
509                         qla2x00_mark_all_devices_lost(ha);
510                 }
511
512                 set_bit(LOOP_RESYNC_NEEDED, &ha->dpc_flags);
513                 set_bit(LOCAL_LOOP_UPDATE, &ha->dpc_flags);
514                 break;
515
516         case MBA_PORT_UPDATE:           /* Port database update */
517                 /*
518                  * If a single remote port just logged into (or logged out of)
519                  * us, create a new entry in our rscn fcports list and handle
520                  * the event like an RSCN.
521                  */
522                 if (!IS_QLA2100(ha) && !IS_QLA2200(ha) && !IS_QLA6312(ha) &&
523                     !IS_QLA6322(ha) && !IS_QLA24XX(ha) && !IS_QLA25XX(ha) &&
524                     ha->flags.init_done && mb[1] != 0xffff &&
525                     ((ha->operating_mode == P2P && mb[1] != 0) ||
526                     (ha->operating_mode != P2P && mb[1] !=
527                         SNS_FIRST_LOOP_ID)) && (mb[2] == 6 || mb[2] == 7)) {
528                         int rval;
529                         fc_port_t *rscn_fcport;
530
531                         /* Create new fcport for login. */
532                         rscn_fcport = qla2x00_alloc_rscn_fcport(ha, GFP_ATOMIC);
533                         if (rscn_fcport) {
534                                 DEBUG14(printk("scsi(%ld): Port Update -- "
535                                     "creating RSCN fcport %p for %x/%x/%x.\n",
536                                     ha->host_no, rscn_fcport, mb[1], mb[2],
537                                     mb[3]));
538
539                                 rscn_fcport->loop_id = mb[1];
540                                 rscn_fcport->d_id.b24 = INVALID_PORT_ID;
541                                 atomic_set(&rscn_fcport->state,
542                                     FCS_DEVICE_LOST);
543                                 list_add_tail(&rscn_fcport->list,
544                                     &ha->rscn_fcports);
545
546                                 rval = qla2x00_handle_port_rscn(ha, 0,
547                                     rscn_fcport, 1);
548                                 if (rval == QLA_SUCCESS)
549                                         break;
550                         } else {
551                                 DEBUG14(printk("scsi(%ld): Port Update -- "
552                                     "-- unable to allocate RSCN fcport "
553                                     "login.\n", ha->host_no));
554                         }
555                 }
556
557                 /*
558                  * If PORT UPDATE is global (recieved LIP_OCCURED/LIP_RESET
559                  * event etc. earlier indicating loop is down) then process
560                  * it.  Otherwise ignore it and Wait for RSCN to come in.
561                  */
562                 atomic_set(&ha->loop_down_timer, 0);
563                 if (atomic_read(&ha->loop_state) != LOOP_DOWN &&
564                     atomic_read(&ha->loop_state) != LOOP_DEAD) {
565                         DEBUG2(printk("scsi(%ld): Asynchronous PORT UPDATE "
566                             "ignored %04x/%04x/%04x.\n", ha->host_no, mb[1],
567                             mb[2], mb[3]));
568                         break;
569                 }
570
571                 DEBUG2(printk("scsi(%ld): Asynchronous PORT UPDATE.\n",
572                     ha->host_no));
573                 DEBUG(printk(KERN_INFO
574                     "scsi(%ld): Port database changed %04x %04x %04x.\n",
575                     ha->host_no, mb[1], mb[2], mb[3]));
576
577                 /*
578                  * Mark all devices as missing so we will login again.
579                  */
580                 atomic_set(&ha->loop_state, LOOP_UP);
581
582                 qla2x00_mark_all_devices_lost(ha);
583
584                 ha->flags.rscn_queue_overflow = 1;
585
586                 set_bit(LOOP_RESYNC_NEEDED, &ha->dpc_flags);
587                 set_bit(LOCAL_LOOP_UPDATE, &ha->dpc_flags);
588
589                 /* Update AEN queue. */
590                 qla2x00_enqueue_aen(ha, MBA_PORT_UPDATE, NULL);
591                 break;
592
593         case MBA_RSCN_UPDATE:           /* State Change Registration */
594                 DEBUG2(printk("scsi(%ld): Asynchronous RSCR UPDATE.\n",
595                     ha->host_no));
596                 DEBUG(printk(KERN_INFO
597                     "scsi(%ld): RSCN database changed -- %04x %04x.\n",
598                     ha->host_no, mb[1], mb[2]));
599
600                 rscn_entry = (mb[1] << 16) | mb[2];
601                 host_pid = (ha->d_id.b.domain << 16) | (ha->d_id.b.area << 8) |
602                     ha->d_id.b.al_pa;
603                 if (rscn_entry == host_pid) {
604                         DEBUG(printk(KERN_INFO
605                             "scsi(%ld): Ignoring RSCN update to local host "
606                             "port ID (%06x)\n",
607                             ha->host_no, host_pid));
608                         break;
609                 }
610
611                 rscn_queue_index = ha->rscn_in_ptr + 1;
612                 if (rscn_queue_index == MAX_RSCN_COUNT)
613                         rscn_queue_index = 0;
614                 if (rscn_queue_index != ha->rscn_out_ptr) {
615                         ha->rscn_queue[ha->rscn_in_ptr] = rscn_entry;
616                         ha->rscn_in_ptr = rscn_queue_index;
617                 } else {
618                         ha->flags.rscn_queue_overflow = 1;
619                 }
620
621                 atomic_set(&ha->loop_state, LOOP_UPDATE);
622                 atomic_set(&ha->loop_down_timer, 0);
623                 ha->flags.management_server_logged_in = 0;
624
625                 set_bit(LOOP_RESYNC_NEEDED, &ha->dpc_flags);
626                 set_bit(RSCN_UPDATE, &ha->dpc_flags);
627
628                 /* Update AEN queue. */
629                 qla2x00_enqueue_aen(ha, MBA_RSCN_UPDATE, &mb[0]);
630                 break;
631
632         /* case MBA_RIO_RESPONSE: */
633         case MBA_ZIO_RESPONSE:
634                 DEBUG2(printk("scsi(%ld): [R|Z]IO update completion.\n",
635                     ha->host_no));
636                 DEBUG(printk(KERN_INFO
637                     "scsi(%ld): [R|Z]IO update completion.\n",
638                     ha->host_no));
639
640                 if (IS_QLA24XX(ha) || IS_QLA25XX(ha))
641                         qla24xx_process_response_queue(ha);
642                 else
643                         qla2x00_process_response_queue(ha);
644                 break;
645
646         case MBA_DISCARD_RND_FRAME:
647                 DEBUG2(printk("scsi(%ld): Discard RND Frame -- %04x %04x "
648                     "%04x.\n", ha->host_no, mb[1], mb[2], mb[3]));
649                 break;
650         }
651 }
652
653 /**
654  * qla2x00_process_completed_request() - Process a Fast Post response.
655  * @ha: SCSI driver HA context
656  * @index: SRB index
657  */
658 static void
659 qla2x00_process_completed_request(struct scsi_qla_host *ha, uint32_t index)
660 {
661         srb_t *sp;
662
663         /* Validate handle. */
664         if (index >= MAX_OUTSTANDING_COMMANDS) {
665                 DEBUG2(printk("scsi(%ld): Invalid SCSI completion handle %d.\n",
666                     ha->host_no, index));
667                 qla_printk(KERN_WARNING, ha,
668                     "Invalid SCSI completion handle %d.\n", index);
669
670                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
671                 return;
672         }
673
674         sp = ha->outstanding_cmds[index];
675         if (sp) {
676                 /* Free outstanding command slot. */
677                 ha->outstanding_cmds[index] = NULL;
678
679                 CMD_COMPL_STATUS(sp->cmd) = 0L;
680                 CMD_SCSI_STATUS(sp->cmd) = 0L;
681
682                 /* Save ISP completion status */
683                 sp->cmd->result = DID_OK << 16;
684                 qla2x00_sp_compl(ha, sp);
685         } else {
686                 DEBUG2(printk("scsi(%ld): Invalid ISP SCSI completion handle\n",
687                     ha->host_no));
688                 qla_printk(KERN_WARNING, ha,
689                     "Invalid ISP SCSI completion handle\n");
690
691                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
692         }
693 }
694
695 /**
696  * qla2x00_process_response_queue() - Process response queue entries.
697  * @ha: SCSI driver HA context
698  */
699 void
700 qla2x00_process_response_queue(struct scsi_qla_host *ha)
701 {
702         struct device_reg_2xxx __iomem *reg = &ha->iobase->isp;
703         sts_entry_t     *pkt;
704         uint16_t        handle_cnt;
705         uint16_t        cnt;
706
707         if (!ha->flags.online)
708                 return;
709
710         while (ha->response_ring_ptr->signature != RESPONSE_PROCESSED) {
711                 pkt = (sts_entry_t *)ha->response_ring_ptr;
712
713                 ha->rsp_ring_index++;
714                 if (ha->rsp_ring_index == ha->response_q_length) {
715                         ha->rsp_ring_index = 0;
716                         ha->response_ring_ptr = ha->response_ring;
717                 } else {
718                         ha->response_ring_ptr++;
719                 }
720
721                 if (pkt->entry_status != 0) {
722                         DEBUG3(printk(KERN_INFO
723                             "scsi(%ld): Process error entry.\n", ha->host_no));
724
725                         qla2x00_error_entry(ha, pkt);
726                         ((response_t *)pkt)->signature = RESPONSE_PROCESSED;
727                         wmb();
728                         continue;
729                 }
730
731                 switch (pkt->entry_type) {
732                 case STATUS_TYPE:
733                         qla2x00_status_entry(ha, pkt);
734                         break;
735                 case STATUS_TYPE_21:
736                         handle_cnt = ((sts21_entry_t *)pkt)->handle_count;
737                         for (cnt = 0; cnt < handle_cnt; cnt++) {
738                                 qla2x00_process_completed_request(ha,
739                                     ((sts21_entry_t *)pkt)->handle[cnt]);
740                         }
741                         break;
742                 case STATUS_TYPE_22:
743                         handle_cnt = ((sts22_entry_t *)pkt)->handle_count;
744                         for (cnt = 0; cnt < handle_cnt; cnt++) {
745                                 qla2x00_process_completed_request(ha,
746                                     ((sts22_entry_t *)pkt)->handle[cnt]);
747                         }
748                         break;
749                 case STATUS_CONT_TYPE:
750                         qla2x00_status_cont_entry(ha, (sts_cont_entry_t *)pkt);
751                         break;
752                 case MS_IOCB_TYPE:
753                         qla2x00_ms_entry(ha, (ms_iocb_entry_t *)pkt);
754                         break;
755                 case MBX_IOCB_TYPE:
756                         if (!IS_QLA2100(ha) && !IS_QLA2200(ha) &&
757                             !IS_QLA6312(ha) && !IS_QLA6322(ha)) {
758                                 if (pkt->sys_define == SOURCE_ASYNC_IOCB) {
759                                         qla2x00_process_iodesc(ha,
760                                             (struct mbx_entry *)pkt);
761                                 } else {
762                                         /* MBX IOCB Type Not Supported. */
763                                         DEBUG4(printk(KERN_WARNING
764                                             "scsi(%ld): Received unknown MBX "
765                                             "IOCB response pkt type=%x "
766                                             "source=%x entry status=%x.\n",
767                                             ha->host_no, pkt->entry_type,
768                                             pkt->sys_define,
769                                             pkt->entry_status));
770                                 }
771                                 break;
772                         }
773                         /* Fallthrough. */
774                 default:
775                         /* Type Not Supported. */
776                         DEBUG4(printk(KERN_WARNING
777                             "scsi(%ld): Received unknown response pkt type %x "
778                             "entry status=%x.\n",
779                             ha->host_no, pkt->entry_type, pkt->entry_status));
780                         break;
781                 }
782                 ((response_t *)pkt)->signature = RESPONSE_PROCESSED;
783                 wmb();
784         }
785
786         /* Adjust ring index */
787         WRT_REG_WORD(ISP_RSP_Q_OUT(ha, reg), ha->rsp_ring_index);
788 }
789
790 /**
791  * qla2x00_status_entry() - Process a Status IOCB entry.
792  * @ha: SCSI driver HA context
793  * @pkt: Entry pointer
794  */
795 static void
796 qla2x00_status_entry(scsi_qla_host_t *ha, void *pkt)
797 {
798         srb_t           *sp;
799         fc_port_t       *fcport;
800         struct scsi_cmnd *cp;
801         sts_entry_t *sts;
802         struct sts_entry_24xx *sts24;
803         uint16_t        comp_status;
804         uint16_t        scsi_status;
805         uint8_t         lscsi_status;
806         int32_t         resid;
807         uint32_t        sense_len, rsp_info_len, resid_len;
808         uint8_t         *rsp_info, *sense_data;
809
810         sts = (sts_entry_t *) pkt;
811         sts24 = (struct sts_entry_24xx *) pkt;
812         if (IS_QLA24XX(ha) || IS_QLA25XX(ha)) {
813                 comp_status = le16_to_cpu(sts24->comp_status);
814                 scsi_status = le16_to_cpu(sts24->scsi_status) & SS_MASK;
815         } else {
816                 comp_status = le16_to_cpu(sts->comp_status);
817                 scsi_status = le16_to_cpu(sts->scsi_status) & SS_MASK;
818         }
819
820         /* Fast path completion. */
821         if (comp_status == CS_COMPLETE && scsi_status == 0) {
822                 qla2x00_process_completed_request(ha, sts->handle);
823
824                 return;
825         }
826
827         /* Validate handle. */
828         if (sts->handle < MAX_OUTSTANDING_COMMANDS) {
829                 sp = ha->outstanding_cmds[sts->handle];
830                 ha->outstanding_cmds[sts->handle] = NULL;
831         } else
832                 sp = NULL;
833
834         if (sp == NULL) {
835                 DEBUG2(printk("scsi(%ld): Status Entry invalid handle.\n",
836                     ha->host_no));
837                 qla_printk(KERN_WARNING, ha, "Status Entry invalid handle.\n");
838
839                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
840                 if (ha->dpc_wait && !ha->dpc_active)
841                         up(ha->dpc_wait);
842
843                 return;
844         }
845         cp = sp->cmd;
846         if (cp == NULL) {
847                 DEBUG2(printk("scsi(%ld): Command already returned back to OS "
848                     "pkt->handle=%d sp=%p sp->state:%d\n",
849                     ha->host_no, sts->handle, sp, sp->state));
850                 qla_printk(KERN_WARNING, ha,
851                     "Command is NULL: already returned to OS (sp=%p)\n", sp);
852
853                 return;
854         }
855
856         lscsi_status = scsi_status & STATUS_MASK;
857         CMD_ENTRY_STATUS(cp) = sts->entry_status;
858         CMD_COMPL_STATUS(cp) = comp_status;
859         CMD_SCSI_STATUS(cp) = scsi_status;
860
861         fcport = sp->fcport;
862
863         sense_len = rsp_info_len = resid_len = 0;
864         if (IS_QLA24XX(ha) || IS_QLA25XX(ha)) {
865                 sense_len = le32_to_cpu(sts24->sense_len);
866                 rsp_info_len = le32_to_cpu(sts24->rsp_data_len);
867                 resid_len = le32_to_cpu(sts24->rsp_residual_count);
868                 rsp_info = sts24->data;
869                 sense_data = sts24->data;
870                 host_to_fcp_swap(sts24->data, sizeof(sts24->data));
871         } else {
872                 sense_len = le16_to_cpu(sts->req_sense_length);
873                 rsp_info_len = le16_to_cpu(sts->rsp_info_len);
874                 resid_len = le32_to_cpu(sts->residual_length);
875                 rsp_info = sts->rsp_info;
876                 sense_data = sts->req_sense_data;
877         }
878
879         /* Check for any FCP transport errors. */
880         if (scsi_status & SS_RESPONSE_INFO_LEN_VALID) {
881                 /* Sense data lies beyond any FCP RESPONSE data. */
882                 if (IS_QLA24XX(ha) || IS_QLA25XX(ha))
883                         sense_data += rsp_info_len;
884                 if (rsp_info_len > 3 && rsp_info[3]) {
885                         DEBUG2(printk("scsi(%ld:%d:%d:%d) FCP I/O protocol "
886                             "failure (%x/%02x%02x%02x%02x%02x%02x%02x%02x)..."
887                             "retrying command\n", ha->host_no,
888                             cp->device->channel, cp->device->id,
889                             cp->device->lun, rsp_info_len, rsp_info[0],
890                             rsp_info[1], rsp_info[2], rsp_info[3], rsp_info[4],
891                             rsp_info[5], rsp_info[6], rsp_info[7]));
892
893                         cp->result = DID_BUS_BUSY << 16;
894                         qla2x00_sp_compl(ha, sp);
895                         return;
896                 }
897         }
898
899         /*
900          * Based on Host and scsi status generate status code for Linux
901          */
902         switch (comp_status) {
903         case CS_COMPLETE:
904                 if (scsi_status == 0) {
905                         cp->result = DID_OK << 16;
906                         break;
907                 }
908                 if (scsi_status & (SS_RESIDUAL_UNDER | SS_RESIDUAL_OVER)) {
909                         resid = resid_len;
910                         cp->resid = resid;
911                         CMD_RESID_LEN(cp) = resid;
912                 }
913                 cp->result = DID_OK << 16 | lscsi_status;
914
915                 if (lscsi_status != SS_CHECK_CONDITION)
916                         break;
917
918                 /* Copy Sense Data into sense buffer. */
919                 memset(cp->sense_buffer, 0, sizeof(cp->sense_buffer));
920
921                 if (!(scsi_status & SS_SENSE_LEN_VALID))
922                         break;
923
924                 if (sense_len >= sizeof(cp->sense_buffer))
925                         sense_len = sizeof(cp->sense_buffer);
926
927                 CMD_ACTUAL_SNSLEN(cp) = sense_len;
928                 sp->request_sense_length = sense_len;
929                 sp->request_sense_ptr = cp->sense_buffer;
930
931                 if (sp->request_sense_length > 32)
932                         sense_len = 32;
933
934                 memcpy(cp->sense_buffer, sense_data, sense_len);
935
936                 sp->request_sense_ptr += sense_len;
937                 sp->request_sense_length -= sense_len;
938                 if (sp->request_sense_length != 0)
939                         ha->status_srb = sp;
940
941                 DEBUG5(printk("%s(): Check condition Sense data, "
942                     "scsi(%ld:%d:%d:%d) cmd=%p pid=%ld\n", __func__,
943                     ha->host_no, cp->device->channel, cp->device->id,
944                     cp->device->lun, cp, cp->serial_number));
945                 if (sense_len)
946                         DEBUG5(qla2x00_dump_buffer(cp->sense_buffer,
947                             CMD_ACTUAL_SNSLEN(cp)));
948                 break;
949
950         case CS_DATA_UNDERRUN:
951                 DEBUG2(printk(KERN_INFO
952                     "scsi(%ld:%d:%d) UNDERRUN status detected 0x%x-0x%x.\n",
953                     ha->host_no, cp->device->id, cp->device->lun, comp_status,
954                     scsi_status));
955
956                 resid = resid_len;
957                 if (scsi_status & SS_RESIDUAL_UNDER) {
958                         cp->resid = resid;
959                         CMD_RESID_LEN(cp) = resid;
960                 }
961
962                 /*
963                  * Check to see if SCSI Status is non zero. If so report SCSI
964                  * Status.
965                  */
966                 if (lscsi_status != 0) {
967                         cp->result = DID_OK << 16 | lscsi_status;
968
969                         if (lscsi_status != SS_CHECK_CONDITION)
970                                 break;
971
972                         /* Copy Sense Data into sense buffer */
973                         memset(cp->sense_buffer, 0, sizeof(cp->sense_buffer));
974
975                         if (!(scsi_status & SS_SENSE_LEN_VALID))
976                                 break;
977
978                         if (sense_len >= sizeof(cp->sense_buffer))
979                                 sense_len = sizeof(cp->sense_buffer);
980
981                         CMD_ACTUAL_SNSLEN(cp) = sense_len;
982                         sp->request_sense_length = sense_len;
983                         sp->request_sense_ptr = cp->sense_buffer;
984
985                         if (sp->request_sense_length > 32)
986                                 sense_len = 32;
987
988                         memcpy(cp->sense_buffer, sense_data, sense_len);
989
990                         sp->request_sense_ptr += sense_len;
991                         sp->request_sense_length -= sense_len;
992                         if (sp->request_sense_length != 0)
993                                 ha->status_srb = sp;
994
995                         DEBUG5(printk("%s(): Check condition Sense data, "
996                             "scsi(%ld:%d:%d:%d) cmd=%p pid=%ld\n",
997                             __func__, ha->host_no, cp->device->channel,
998                             cp->device->id, cp->device->lun, cp,
999                             cp->serial_number));
1000
1001                         if (sense_len)
1002                                 DEBUG5(qla2x00_dump_buffer(cp->sense_buffer,
1003                                     CMD_ACTUAL_SNSLEN(cp)));
1004                 } else {
1005                         /*
1006                          * If RISC reports underrun and target does not report
1007                          * it then we must have a lost frame, so tell upper
1008                          * layer to retry it by reporting a bus busy.
1009                          */
1010                         if (!(scsi_status & SS_RESIDUAL_UNDER)) {
1011                                 DEBUG2(printk("scsi(%ld:%d:%d:%d) Dropped "
1012                                     "frame(s) detected (%x of %x bytes)..."
1013                                     "retrying command.\n", ha->host_no,
1014                                     cp->device->channel, cp->device->id,
1015                                     cp->device->lun, resid,
1016                                     cp->request_bufflen));
1017
1018                                 cp->result = DID_BUS_BUSY << 16;
1019                                 break;
1020                         }
1021
1022                         /* Handle mid-layer underflow */
1023                         if ((unsigned)(cp->request_bufflen - resid) <
1024                             cp->underflow) {
1025                                 qla_printk(KERN_INFO, ha,
1026                                     "scsi(%ld:%d:%d:%d): Mid-layer underflow "
1027                                     "detected (%x of %x bytes)...returning "
1028                                     "error status.\n", ha->host_no,
1029                                     cp->device->channel, cp->device->id,
1030                                     cp->device->lun, resid,
1031                                     cp->request_bufflen);
1032
1033                                 cp->result = DID_ERROR << 16;
1034                                 break;
1035                         }
1036
1037                         /* Everybody online, looking good... */
1038                         cp->result = DID_OK << 16;
1039                 }
1040                 break;
1041
1042         case CS_DATA_OVERRUN:
1043                 DEBUG2(printk(KERN_INFO
1044                     "scsi(%ld:%d:%d): OVERRUN status detected 0x%x-0x%x\n",
1045                     ha->host_no, cp->device->id, cp->device->lun, comp_status,
1046                     scsi_status));
1047                 DEBUG2(printk(KERN_INFO
1048                     "CDB: 0x%x 0x%x 0x%x 0x%x 0x%x 0x%x\n",
1049                     cp->cmnd[0], cp->cmnd[1], cp->cmnd[2], cp->cmnd[3],
1050                     cp->cmnd[4], cp->cmnd[5]));
1051                 DEBUG2(printk(KERN_INFO
1052                     "PID=0x%lx req=0x%x xtra=0x%x -- returning DID_ERROR "
1053                     "status!\n",
1054                     cp->serial_number, cp->request_bufflen, resid_len));
1055
1056                 cp->result = DID_ERROR << 16;
1057                 break;
1058
1059         case CS_PORT_LOGGED_OUT:
1060         case CS_PORT_CONFIG_CHG:
1061         case CS_PORT_BUSY:
1062         case CS_INCOMPLETE:
1063         case CS_PORT_UNAVAILABLE:
1064                 /*
1065                  * If the port is in Target Down state, return all IOs for this
1066                  * Target with DID_NO_CONNECT ELSE Queue the IOs in the
1067                  * retry_queue.
1068                  */
1069                 DEBUG2(printk("scsi(%ld:%d:%d): status_entry: Port Down "
1070                     "pid=%ld, compl status=0x%x, port state=0x%x\n",
1071                     ha->host_no, cp->device->id, cp->device->lun,
1072                     cp->serial_number, comp_status,
1073                     atomic_read(&fcport->state)));
1074
1075                 cp->result = DID_BUS_BUSY << 16;
1076                 if (atomic_read(&fcport->state) == FCS_ONLINE) {
1077                         qla2x00_mark_device_lost(ha, fcport, 1);
1078                 }
1079                 break;
1080
1081         case CS_RESET:
1082                 DEBUG2(printk(KERN_INFO
1083                     "scsi(%ld): RESET status detected 0x%x-0x%x.\n",
1084                     ha->host_no, comp_status, scsi_status));
1085
1086                 cp->result = DID_RESET << 16;
1087                 break;
1088
1089         case CS_ABORTED:
1090                 /*
1091                  * hv2.19.12 - DID_ABORT does not retry the request if we
1092                  * aborted this request then abort otherwise it must be a
1093                  * reset.
1094                  */
1095                 DEBUG2(printk(KERN_INFO
1096                     "scsi(%ld): ABORT status detected 0x%x-0x%x.\n",
1097                     ha->host_no, comp_status, scsi_status));
1098
1099                 cp->result = DID_RESET << 16;
1100                 break;
1101
1102         case CS_TIMEOUT:
1103                 cp->result = DID_BUS_BUSY << 16;
1104
1105                 if (IS_QLA24XX(ha) || IS_QLA25XX(ha)) {
1106                         DEBUG2(printk(KERN_INFO
1107                             "scsi(%ld:%d:%d:%d): TIMEOUT status detected "
1108                             "0x%x-0x%x\n", ha->host_no, cp->device->channel,
1109                             cp->device->id, cp->device->lun, comp_status,
1110                             scsi_status));
1111                         break;
1112                 }
1113                 DEBUG2(printk(KERN_INFO
1114                     "scsi(%ld:%d:%d:%d): TIMEOUT status detected 0x%x-0x%x "
1115                     "sflags=%x.\n", ha->host_no, cp->device->channel,
1116                     cp->device->id, cp->device->lun, comp_status, scsi_status,
1117                     le16_to_cpu(sts->status_flags)));
1118
1119                 /* Check to see if logout occurred. */
1120                 if ((le16_to_cpu(sts->status_flags) & SF_LOGOUT_SENT))
1121                         qla2x00_mark_device_lost(ha, fcport, 1);
1122                 break;
1123
1124         case CS_QUEUE_FULL:
1125                 DEBUG2(printk(KERN_INFO
1126                     "scsi(%ld): QUEUE FULL status detected 0x%x-0x%x.\n",
1127                     ha->host_no, comp_status, scsi_status));
1128
1129                 /* SCSI Mid-Layer handles device queue full */
1130
1131                 cp->result = DID_OK << 16 | lscsi_status;
1132
1133                 break;
1134
1135         default:
1136                 DEBUG3(printk("scsi(%ld): Error detected (unknown status) "
1137                     "0x%x-0x%x.\n", ha->host_no, comp_status, scsi_status));
1138                 qla_printk(KERN_INFO, ha,
1139                     "Unknown status detected 0x%x-0x%x.\n",
1140                     comp_status, scsi_status);
1141
1142                 cp->result = DID_ERROR << 16;
1143                 break;
1144         }
1145
1146         /* Place command on done queue. */
1147         if (ha->status_srb == NULL)
1148                 qla2x00_sp_compl(ha, sp);
1149 }
1150
1151 /**
1152  * qla2x00_status_cont_entry() - Process a Status Continuations entry.
1153  * @ha: SCSI driver HA context
1154  * @pkt: Entry pointer
1155  *
1156  * Extended sense data.
1157  */
1158 static void
1159 qla2x00_status_cont_entry(scsi_qla_host_t *ha, sts_cont_entry_t *pkt)
1160 {
1161         uint8_t         sense_sz = 0;
1162         srb_t           *sp = ha->status_srb;
1163         struct scsi_cmnd *cp;
1164
1165         if (sp != NULL && sp->request_sense_length != 0) {
1166                 cp = sp->cmd;
1167                 if (cp == NULL) {
1168                         DEBUG2(printk("%s(): Cmd already returned back to OS "
1169                             "sp=%p sp->state:%d\n", __func__, sp, sp->state));
1170                         qla_printk(KERN_INFO, ha,
1171                             "cmd is NULL: already returned to OS (sp=%p)\n",
1172                             sp);
1173
1174                         ha->status_srb = NULL;
1175                         return;
1176                 }
1177
1178                 if (sp->request_sense_length > sizeof(pkt->data)) {
1179                         sense_sz = sizeof(pkt->data);
1180                 } else {
1181                         sense_sz = sp->request_sense_length;
1182                 }
1183
1184                 /* Move sense data. */
1185                 if (IS_QLA24XX(ha) || IS_QLA25XX(ha))
1186                         host_to_fcp_swap(pkt->data, sizeof(pkt->data));
1187                 memcpy(sp->request_sense_ptr, pkt->data, sense_sz);
1188                 DEBUG5(qla2x00_dump_buffer(sp->request_sense_ptr, sense_sz));
1189
1190                 sp->request_sense_ptr += sense_sz;
1191                 sp->request_sense_length -= sense_sz;
1192
1193                 /* Place command on done queue. */
1194                 if (sp->request_sense_length == 0) {
1195                         ha->status_srb = NULL;
1196                         qla2x00_sp_compl(ha, sp);
1197                 }
1198         }
1199 }
1200
1201 /**
1202  * qla2x00_error_entry() - Process an error entry.
1203  * @ha: SCSI driver HA context
1204  * @pkt: Entry pointer
1205  */
1206 static void
1207 qla2x00_error_entry(scsi_qla_host_t *ha, sts_entry_t *pkt)
1208 {
1209         srb_t *sp;
1210
1211 #if defined(QL_DEBUG_LEVEL_2)
1212         if (pkt->entry_status & RF_INV_E_ORDER)
1213                 qla_printk(KERN_ERR, ha, "%s: Invalid Entry Order\n", __func__);
1214         else if (pkt->entry_status & RF_INV_E_COUNT)
1215                 qla_printk(KERN_ERR, ha, "%s: Invalid Entry Count\n", __func__);
1216         else if (pkt->entry_status & RF_INV_E_PARAM)
1217                 qla_printk(KERN_ERR, ha,
1218                     "%s: Invalid Entry Parameter\n", __func__);
1219         else if (pkt->entry_status & RF_INV_E_TYPE)
1220                 qla_printk(KERN_ERR, ha, "%s: Invalid Entry Type\n", __func__);
1221         else if (pkt->entry_status & RF_BUSY)
1222                 qla_printk(KERN_ERR, ha, "%s: Busy\n", __func__);
1223         else
1224                 qla_printk(KERN_ERR, ha, "%s: UNKNOWN flag error\n", __func__);
1225 #endif
1226
1227         /* Validate handle. */
1228         if (pkt->handle < MAX_OUTSTANDING_COMMANDS)
1229                 sp = ha->outstanding_cmds[pkt->handle];
1230         else
1231                 sp = NULL;
1232
1233         if (sp) {
1234                 /* Free outstanding command slot. */
1235                 ha->outstanding_cmds[pkt->handle] = NULL;
1236
1237                 /* Bad payload or header */
1238                 if (pkt->entry_status &
1239                     (RF_INV_E_ORDER | RF_INV_E_COUNT |
1240                      RF_INV_E_PARAM | RF_INV_E_TYPE)) {
1241                         sp->cmd->result = DID_ERROR << 16;
1242                 } else if (pkt->entry_status & RF_BUSY) {
1243                         sp->cmd->result = DID_BUS_BUSY << 16;
1244                 } else {
1245                         sp->cmd->result = DID_ERROR << 16;
1246                 }
1247                 qla2x00_sp_compl(ha, sp);
1248
1249         } else if (pkt->entry_type == COMMAND_A64_TYPE || pkt->entry_type ==
1250             COMMAND_TYPE || pkt->entry_type == COMMAND_TYPE_7) {
1251                 DEBUG2(printk("scsi(%ld): Error entry - invalid handle\n",
1252                     ha->host_no));
1253                 qla_printk(KERN_WARNING, ha,
1254                     "Error entry - invalid handle\n");
1255
1256                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
1257                 if (ha->dpc_wait && !ha->dpc_active)
1258                         up(ha->dpc_wait);
1259         }
1260 }
1261
1262 /**
1263  * qla2x00_ms_entry() - Process a Management Server entry.
1264  * @ha: SCSI driver HA context
1265  * @index: Response queue out pointer
1266  */
1267 static void
1268 qla2x00_ms_entry(scsi_qla_host_t *ha, ms_iocb_entry_t *pkt)
1269 {
1270         srb_t          *sp;
1271
1272         DEBUG3(printk("%s(%ld): pkt=%p pkthandle=%d.\n",
1273             __func__, ha->host_no, pkt, pkt->handle1));
1274
1275         /* Validate handle. */
1276         if (pkt->handle1 < MAX_OUTSTANDING_COMMANDS)
1277                 sp = ha->outstanding_cmds[pkt->handle1];
1278         else
1279                 sp = NULL;
1280
1281         if (sp == NULL) {
1282                 DEBUG2(printk("scsi(%ld): MS entry - invalid handle\n",
1283                     ha->host_no));
1284                 qla_printk(KERN_WARNING, ha, "MS entry - invalid handle\n");
1285
1286                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
1287                 return;
1288         }
1289
1290         CMD_COMPL_STATUS(sp->cmd) = le16_to_cpu(pkt->status);
1291         CMD_ENTRY_STATUS(sp->cmd) = pkt->entry_status;
1292
1293         /* Free outstanding command slot. */
1294         ha->outstanding_cmds[pkt->handle1] = NULL;
1295
1296         qla2x00_sp_compl(ha, sp);
1297 }
1298
1299
1300 /**
1301  * qla24xx_mbx_completion() - Process mailbox command completions.
1302  * @ha: SCSI driver HA context
1303  * @mb0: Mailbox0 register
1304  */
1305 static void
1306 qla24xx_mbx_completion(scsi_qla_host_t *ha, uint16_t mb0)
1307 {
1308         uint16_t        cnt;
1309         uint16_t __iomem *wptr;
1310         struct device_reg_24xx __iomem *reg = &ha->iobase->isp24;
1311
1312         /* Load return mailbox registers. */
1313         ha->flags.mbox_int = 1;
1314         ha->mailbox_out[0] = mb0;
1315         wptr = (uint16_t __iomem *)&reg->mailbox1;
1316
1317         for (cnt = 1; cnt < ha->mbx_count; cnt++) {
1318                 ha->mailbox_out[cnt] = RD_REG_WORD(wptr);
1319                 wptr++;
1320         }
1321
1322         if (ha->mcp) {
1323                 DEBUG3(printk("%s(%ld): Got mailbox completion. cmd=%x.\n",
1324                     __func__, ha->host_no, ha->mcp->mb[0]));
1325         } else {
1326                 DEBUG2_3(printk("%s(%ld): MBX pointer ERROR!\n",
1327                     __func__, ha->host_no));
1328         }
1329 }
1330
1331 /**
1332  * qla24xx_process_response_queue() - Process response queue entries.
1333  * @ha: SCSI driver HA context
1334  */
1335 void
1336 qla24xx_process_response_queue(struct scsi_qla_host *ha)
1337 {
1338         struct device_reg_24xx __iomem *reg = &ha->iobase->isp24;
1339         struct sts_entry_24xx *pkt;
1340
1341         if (!ha->flags.online)
1342                 return;
1343
1344         while (ha->response_ring_ptr->signature != RESPONSE_PROCESSED) {
1345                 pkt = (struct sts_entry_24xx *)ha->response_ring_ptr;
1346
1347                 ha->rsp_ring_index++;
1348                 if (ha->rsp_ring_index == ha->response_q_length) {
1349                         ha->rsp_ring_index = 0;
1350                         ha->response_ring_ptr = ha->response_ring;
1351                 } else {
1352                         ha->response_ring_ptr++;
1353                 }
1354
1355                 if (pkt->entry_status != 0) {
1356                         DEBUG3(printk(KERN_INFO
1357                             "scsi(%ld): Process error entry.\n", ha->host_no));
1358
1359                         qla2x00_error_entry(ha, (sts_entry_t *) pkt);
1360                         ((response_t *)pkt)->signature = RESPONSE_PROCESSED;
1361                         wmb();
1362                         continue;
1363                 }
1364
1365                 switch (pkt->entry_type) {
1366                 case STATUS_TYPE:
1367                         qla2x00_status_entry(ha, pkt);
1368                         break;
1369                 case STATUS_CONT_TYPE:
1370                         qla2x00_status_cont_entry(ha, (sts_cont_entry_t *)pkt);
1371                         break;
1372                 case MS_IOCB_TYPE:
1373                         qla24xx_ms_entry(ha, (struct ct_entry_24xx *)pkt);
1374                         break;
1375                 default:
1376                         /* Type Not Supported. */
1377                         DEBUG4(printk(KERN_WARNING
1378                             "scsi(%ld): Received unknown response pkt type %x "
1379                             "entry status=%x.\n",
1380                             ha->host_no, pkt->entry_type, pkt->entry_status));
1381                         break;
1382                 }
1383                 ((response_t *)pkt)->signature = RESPONSE_PROCESSED;
1384                 wmb();
1385         }
1386
1387         /* Adjust ring index */
1388         WRT_REG_DWORD(&reg->rsp_q_out, ha->rsp_ring_index);
1389 }
1390
1391 /**
1392  * qla24xx_intr_handler() - Process interrupts for the ISP23xx and ISP63xx.
1393  * @irq:
1394  * @dev_id: SCSI driver HA context
1395  * @regs:
1396  *
1397  * Called by system whenever the host adapter generates an interrupt.
1398  *
1399  * Returns handled flag.
1400  */
1401 irqreturn_t
1402 qla24xx_intr_handler(int irq, void *dev_id, struct pt_regs *regs)
1403 {
1404         scsi_qla_host_t *ha;
1405         struct device_reg_24xx __iomem *reg;
1406         int             status;
1407         unsigned long   flags;
1408         unsigned long   iter;
1409         uint32_t        stat;
1410         uint32_t        hccr;
1411         uint16_t        mb[4];
1412
1413         ha = (scsi_qla_host_t *) dev_id;
1414         if (!ha) {
1415                 printk(KERN_INFO
1416                     "%s(): NULL host pointer\n", __func__);
1417                 return IRQ_NONE;
1418         }
1419
1420         reg = &ha->iobase->isp24;
1421         status = 0;
1422
1423         spin_lock_irqsave(&ha->hardware_lock, flags);
1424         for (iter = 50; iter--; ) {
1425                 stat = RD_REG_DWORD(&reg->host_status);
1426                 if (stat & HSRX_RISC_PAUSED) {
1427                         hccr = RD_REG_DWORD(&reg->hccr);
1428
1429                         qla_printk(KERN_INFO, ha, "RISC paused -- HCCR=%x, "
1430                             "Dumping firmware!\n", hccr);
1431                         qla24xx_fw_dump(ha, 1);
1432
1433                         set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
1434                         break;
1435                 } else if ((stat & HSRX_RISC_INT) == 0)
1436                         break;
1437
1438                 switch (stat & 0xff) {
1439                 case 0x1:
1440                 case 0x2:
1441                 case 0x10:
1442                 case 0x11:
1443                         qla24xx_mbx_completion(ha, MSW(stat));
1444                         status |= MBX_INTERRUPT;
1445
1446                         break;
1447                 case 0x12:
1448                         mb[0] = MSW(stat);
1449                         mb[1] = RD_REG_WORD(&reg->mailbox1);
1450                         mb[2] = RD_REG_WORD(&reg->mailbox2);
1451                         mb[3] = RD_REG_WORD(&reg->mailbox3);
1452                         qla2x00_async_event(ha, mb);
1453                         break;
1454                 case 0x13:
1455                         qla24xx_process_response_queue(ha);
1456                         break;
1457                 default:
1458                         DEBUG2(printk("scsi(%ld): Unrecognized interrupt type "
1459                             "(%d).\n",
1460                             ha->host_no, stat & 0xff));
1461                         break;
1462                 }
1463                 WRT_REG_DWORD(&reg->hccr, HCCRX_CLR_RISC_INT);
1464                 RD_REG_DWORD_RELAXED(&reg->hccr);
1465         }
1466         spin_unlock_irqrestore(&ha->hardware_lock, flags);
1467
1468         if (test_bit(MBX_INTR_WAIT, &ha->mbx_cmd_flags) &&
1469             (status & MBX_INTERRUPT) && ha->flags.mbox_int) {
1470                 spin_lock_irqsave(&ha->mbx_reg_lock, flags);
1471
1472                 set_bit(MBX_INTERRUPT, &ha->mbx_cmd_flags);
1473                 up(&ha->mbx_intr_sem);
1474
1475                 spin_unlock_irqrestore(&ha->mbx_reg_lock, flags);
1476         }
1477
1478         return IRQ_HANDLED;
1479 }
1480
1481 /**
1482  * qla24xx_ms_entry() - Process a Management Server entry.
1483  * @ha: SCSI driver HA context
1484  * @index: Response queue out pointer
1485  */
1486 static void
1487 qla24xx_ms_entry(scsi_qla_host_t *ha, struct ct_entry_24xx *pkt)
1488 {
1489         srb_t          *sp;
1490
1491         DEBUG3(printk("%s(%ld): pkt=%p pkthandle=%d.\n",
1492             __func__, ha->host_no, pkt, pkt->handle));
1493
1494         DEBUG9(printk("%s: ct pkt dump:\n", __func__);)
1495         DEBUG9(qla2x00_dump_buffer((void *)pkt, sizeof(struct ct_entry_24xx));)
1496
1497         /* Validate handle. */
1498         if (pkt->handle < MAX_OUTSTANDING_COMMANDS)
1499                 sp = ha->outstanding_cmds[pkt->handle];
1500         else
1501                 sp = NULL;
1502
1503         if (sp == NULL) {
1504                 DEBUG2(printk("scsi(%ld): MS entry - invalid handle\n",
1505                     ha->host_no));
1506                 DEBUG10(printk("scsi(%ld): MS entry - invalid handle\n",
1507                     ha->host_no));
1508                 qla_printk(KERN_WARNING, ha, "MS entry - invalid handle %d\n",
1509                     pkt->handle);
1510
1511                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
1512                 return;
1513         }
1514
1515         CMD_COMPL_STATUS(sp->cmd) = le16_to_cpu(pkt->comp_status);
1516         CMD_ENTRY_STATUS(sp->cmd) = pkt->entry_status;
1517
1518         /* Free outstanding command slot. */
1519         ha->outstanding_cmds[pkt->handle] = NULL;
1520
1521         qla2x00_sp_compl(ha, sp);
1522 }
1523