Merge branch 'master'
[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, 1);
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, 1);
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, 1);
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, 1);
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, 1);
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 (ql2xprocessrscn &&
523                     !IS_QLA2100(ha) && !IS_QLA2200(ha) && !IS_QLA6312(ha) &&
524                     !IS_QLA6322(ha) && !IS_QLA24XX(ha) && !IS_QLA25XX(ha) &&
525                     ha->flags.init_done && mb[1] != 0xffff &&
526                     ((ha->operating_mode == P2P && mb[1] != 0) ||
527                     (ha->operating_mode != P2P && mb[1] !=
528                         SNS_FIRST_LOOP_ID)) && (mb[2] == 6 || mb[2] == 7)) {
529                         int rval;
530                         fc_port_t *rscn_fcport;
531
532                         /* Create new fcport for login. */
533                         rscn_fcport = qla2x00_alloc_rscn_fcport(ha, GFP_ATOMIC);
534                         if (rscn_fcport) {
535                                 DEBUG14(printk("scsi(%ld): Port Update -- "
536                                     "creating RSCN fcport %p for %x/%x/%x.\n",
537                                     ha->host_no, rscn_fcport, mb[1], mb[2],
538                                     mb[3]));
539
540                                 rscn_fcport->loop_id = mb[1];
541                                 rscn_fcport->d_id.b24 = INVALID_PORT_ID;
542                                 atomic_set(&rscn_fcport->state,
543                                     FCS_DEVICE_LOST);
544                                 list_add_tail(&rscn_fcport->list,
545                                     &ha->rscn_fcports);
546
547                                 rval = qla2x00_handle_port_rscn(ha, 0,
548                                     rscn_fcport, 1);
549                                 if (rval == QLA_SUCCESS)
550                                         break;
551                         } else {
552                                 DEBUG14(printk("scsi(%ld): Port Update -- "
553                                     "-- unable to allocate RSCN fcport "
554                                     "login.\n", ha->host_no));
555                         }
556                 }
557
558                 /*
559                  * If PORT UPDATE is global (recieved LIP_OCCURED/LIP_RESET
560                  * event etc. earlier indicating loop is down) then process
561                  * it.  Otherwise ignore it and Wait for RSCN to come in.
562                  */
563                 atomic_set(&ha->loop_down_timer, 0);
564                 if (atomic_read(&ha->loop_state) != LOOP_DOWN &&
565                     atomic_read(&ha->loop_state) != LOOP_DEAD) {
566                         DEBUG2(printk("scsi(%ld): Asynchronous PORT UPDATE "
567                             "ignored %04x/%04x/%04x.\n", ha->host_no, mb[1],
568                             mb[2], mb[3]));
569                         break;
570                 }
571
572                 DEBUG2(printk("scsi(%ld): Asynchronous PORT UPDATE.\n",
573                     ha->host_no));
574                 DEBUG(printk(KERN_INFO
575                     "scsi(%ld): Port database changed %04x %04x %04x.\n",
576                     ha->host_no, mb[1], mb[2], mb[3]));
577
578                 /*
579                  * Mark all devices as missing so we will login again.
580                  */
581                 atomic_set(&ha->loop_state, LOOP_UP);
582
583                 qla2x00_mark_all_devices_lost(ha, 1);
584
585                 ha->flags.rscn_queue_overflow = 1;
586
587                 set_bit(LOOP_RESYNC_NEEDED, &ha->dpc_flags);
588                 set_bit(LOCAL_LOOP_UPDATE, &ha->dpc_flags);
589
590                 /* Update AEN queue. */
591                 qla2x00_enqueue_aen(ha, MBA_PORT_UPDATE, NULL);
592                 break;
593
594         case MBA_RSCN_UPDATE:           /* State Change Registration */
595                 DEBUG2(printk("scsi(%ld): Asynchronous RSCR UPDATE.\n",
596                     ha->host_no));
597                 DEBUG(printk(KERN_INFO
598                     "scsi(%ld): RSCN database changed -- %04x %04x.\n",
599                     ha->host_no, mb[1], mb[2]));
600
601                 rscn_entry = (mb[1] << 16) | mb[2];
602                 host_pid = (ha->d_id.b.domain << 16) | (ha->d_id.b.area << 8) |
603                     ha->d_id.b.al_pa;
604                 if (rscn_entry == host_pid) {
605                         DEBUG(printk(KERN_INFO
606                             "scsi(%ld): Ignoring RSCN update to local host "
607                             "port ID (%06x)\n",
608                             ha->host_no, host_pid));
609                         break;
610                 }
611
612                 rscn_queue_index = ha->rscn_in_ptr + 1;
613                 if (rscn_queue_index == MAX_RSCN_COUNT)
614                         rscn_queue_index = 0;
615                 if (rscn_queue_index != ha->rscn_out_ptr) {
616                         ha->rscn_queue[ha->rscn_in_ptr] = rscn_entry;
617                         ha->rscn_in_ptr = rscn_queue_index;
618                 } else {
619                         ha->flags.rscn_queue_overflow = 1;
620                 }
621
622                 atomic_set(&ha->loop_state, LOOP_UPDATE);
623                 atomic_set(&ha->loop_down_timer, 0);
624                 ha->flags.management_server_logged_in = 0;
625
626                 set_bit(LOOP_RESYNC_NEEDED, &ha->dpc_flags);
627                 set_bit(RSCN_UPDATE, &ha->dpc_flags);
628
629                 /* Update AEN queue. */
630                 qla2x00_enqueue_aen(ha, MBA_RSCN_UPDATE, &mb[0]);
631                 break;
632
633         /* case MBA_RIO_RESPONSE: */
634         case MBA_ZIO_RESPONSE:
635                 DEBUG2(printk("scsi(%ld): [R|Z]IO update completion.\n",
636                     ha->host_no));
637                 DEBUG(printk(KERN_INFO
638                     "scsi(%ld): [R|Z]IO update completion.\n",
639                     ha->host_no));
640
641                 if (IS_QLA24XX(ha) || IS_QLA25XX(ha))
642                         qla24xx_process_response_queue(ha);
643                 else
644                         qla2x00_process_response_queue(ha);
645                 break;
646
647         case MBA_DISCARD_RND_FRAME:
648                 DEBUG2(printk("scsi(%ld): Discard RND Frame -- %04x %04x "
649                     "%04x.\n", ha->host_no, mb[1], mb[2], mb[3]));
650                 break;
651         }
652 }
653
654 /**
655  * qla2x00_process_completed_request() - Process a Fast Post response.
656  * @ha: SCSI driver HA context
657  * @index: SRB index
658  */
659 static void
660 qla2x00_process_completed_request(struct scsi_qla_host *ha, uint32_t index)
661 {
662         srb_t *sp;
663
664         /* Validate handle. */
665         if (index >= MAX_OUTSTANDING_COMMANDS) {
666                 DEBUG2(printk("scsi(%ld): Invalid SCSI completion handle %d.\n",
667                     ha->host_no, index));
668                 qla_printk(KERN_WARNING, ha,
669                     "Invalid SCSI completion handle %d.\n", index);
670
671                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
672                 return;
673         }
674
675         sp = ha->outstanding_cmds[index];
676         if (sp) {
677                 /* Free outstanding command slot. */
678                 ha->outstanding_cmds[index] = NULL;
679
680                 CMD_COMPL_STATUS(sp->cmd) = 0L;
681                 CMD_SCSI_STATUS(sp->cmd) = 0L;
682
683                 /* Save ISP completion status */
684                 sp->cmd->result = DID_OK << 16;
685                 qla2x00_sp_compl(ha, sp);
686         } else {
687                 DEBUG2(printk("scsi(%ld): Invalid ISP SCSI completion handle\n",
688                     ha->host_no));
689                 qla_printk(KERN_WARNING, ha,
690                     "Invalid ISP SCSI completion handle\n");
691
692                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
693         }
694 }
695
696 /**
697  * qla2x00_process_response_queue() - Process response queue entries.
698  * @ha: SCSI driver HA context
699  */
700 void
701 qla2x00_process_response_queue(struct scsi_qla_host *ha)
702 {
703         struct device_reg_2xxx __iomem *reg = &ha->iobase->isp;
704         sts_entry_t     *pkt;
705         uint16_t        handle_cnt;
706         uint16_t        cnt;
707
708         if (!ha->flags.online)
709                 return;
710
711         while (ha->response_ring_ptr->signature != RESPONSE_PROCESSED) {
712                 pkt = (sts_entry_t *)ha->response_ring_ptr;
713
714                 ha->rsp_ring_index++;
715                 if (ha->rsp_ring_index == ha->response_q_length) {
716                         ha->rsp_ring_index = 0;
717                         ha->response_ring_ptr = ha->response_ring;
718                 } else {
719                         ha->response_ring_ptr++;
720                 }
721
722                 if (pkt->entry_status != 0) {
723                         DEBUG3(printk(KERN_INFO
724                             "scsi(%ld): Process error entry.\n", ha->host_no));
725
726                         qla2x00_error_entry(ha, pkt);
727                         ((response_t *)pkt)->signature = RESPONSE_PROCESSED;
728                         wmb();
729                         continue;
730                 }
731
732                 switch (pkt->entry_type) {
733                 case STATUS_TYPE:
734                         qla2x00_status_entry(ha, pkt);
735                         break;
736                 case STATUS_TYPE_21:
737                         handle_cnt = ((sts21_entry_t *)pkt)->handle_count;
738                         for (cnt = 0; cnt < handle_cnt; cnt++) {
739                                 qla2x00_process_completed_request(ha,
740                                     ((sts21_entry_t *)pkt)->handle[cnt]);
741                         }
742                         break;
743                 case STATUS_TYPE_22:
744                         handle_cnt = ((sts22_entry_t *)pkt)->handle_count;
745                         for (cnt = 0; cnt < handle_cnt; cnt++) {
746                                 qla2x00_process_completed_request(ha,
747                                     ((sts22_entry_t *)pkt)->handle[cnt]);
748                         }
749                         break;
750                 case STATUS_CONT_TYPE:
751                         qla2x00_status_cont_entry(ha, (sts_cont_entry_t *)pkt);
752                         break;
753                 case MS_IOCB_TYPE:
754                         qla2x00_ms_entry(ha, (ms_iocb_entry_t *)pkt);
755                         break;
756                 case MBX_IOCB_TYPE:
757                         if (!IS_QLA2100(ha) && !IS_QLA2200(ha) &&
758                             !IS_QLA6312(ha) && !IS_QLA6322(ha)) {
759                                 if (pkt->sys_define == SOURCE_ASYNC_IOCB) {
760                                         qla2x00_process_iodesc(ha,
761                                             (struct mbx_entry *)pkt);
762                                 } else {
763                                         /* MBX IOCB Type Not Supported. */
764                                         DEBUG4(printk(KERN_WARNING
765                                             "scsi(%ld): Received unknown MBX "
766                                             "IOCB response pkt type=%x "
767                                             "source=%x entry status=%x.\n",
768                                             ha->host_no, pkt->entry_type,
769                                             pkt->sys_define,
770                                             pkt->entry_status));
771                                 }
772                                 break;
773                         }
774                         /* Fallthrough. */
775                 default:
776                         /* Type Not Supported. */
777                         DEBUG4(printk(KERN_WARNING
778                             "scsi(%ld): Received unknown response pkt type %x "
779                             "entry status=%x.\n",
780                             ha->host_no, pkt->entry_type, pkt->entry_status));
781                         break;
782                 }
783                 ((response_t *)pkt)->signature = RESPONSE_PROCESSED;
784                 wmb();
785         }
786
787         /* Adjust ring index */
788         WRT_REG_WORD(ISP_RSP_Q_OUT(ha, reg), ha->rsp_ring_index);
789 }
790
791 /**
792  * qla2x00_status_entry() - Process a Status IOCB entry.
793  * @ha: SCSI driver HA context
794  * @pkt: Entry pointer
795  */
796 static void
797 qla2x00_status_entry(scsi_qla_host_t *ha, void *pkt)
798 {
799         srb_t           *sp;
800         fc_port_t       *fcport;
801         struct scsi_cmnd *cp;
802         sts_entry_t *sts;
803         struct sts_entry_24xx *sts24;
804         uint16_t        comp_status;
805         uint16_t        scsi_status;
806         uint8_t         lscsi_status;
807         int32_t         resid;
808         uint32_t        sense_len, rsp_info_len, resid_len;
809         uint8_t         *rsp_info, *sense_data;
810
811         sts = (sts_entry_t *) pkt;
812         sts24 = (struct sts_entry_24xx *) pkt;
813         if (IS_QLA24XX(ha) || IS_QLA25XX(ha)) {
814                 comp_status = le16_to_cpu(sts24->comp_status);
815                 scsi_status = le16_to_cpu(sts24->scsi_status) & SS_MASK;
816         } else {
817                 comp_status = le16_to_cpu(sts->comp_status);
818                 scsi_status = le16_to_cpu(sts->scsi_status) & SS_MASK;
819         }
820
821         /* Fast path completion. */
822         if (comp_status == CS_COMPLETE && scsi_status == 0) {
823                 qla2x00_process_completed_request(ha, sts->handle);
824
825                 return;
826         }
827
828         /* Validate handle. */
829         if (sts->handle < MAX_OUTSTANDING_COMMANDS) {
830                 sp = ha->outstanding_cmds[sts->handle];
831                 ha->outstanding_cmds[sts->handle] = NULL;
832         } else
833                 sp = NULL;
834
835         if (sp == NULL) {
836                 DEBUG2(printk("scsi(%ld): Status Entry invalid handle.\n",
837                     ha->host_no));
838                 qla_printk(KERN_WARNING, ha, "Status Entry invalid handle.\n");
839
840                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
841                 if (ha->dpc_wait && !ha->dpc_active)
842                         up(ha->dpc_wait);
843
844                 return;
845         }
846         cp = sp->cmd;
847         if (cp == NULL) {
848                 DEBUG2(printk("scsi(%ld): Command already returned back to OS "
849                     "pkt->handle=%d sp=%p sp->state:%d\n",
850                     ha->host_no, sts->handle, sp, sp->state));
851                 qla_printk(KERN_WARNING, ha,
852                     "Command is NULL: already returned to OS (sp=%p)\n", sp);
853
854                 return;
855         }
856
857         lscsi_status = scsi_status & STATUS_MASK;
858         CMD_ENTRY_STATUS(cp) = sts->entry_status;
859         CMD_COMPL_STATUS(cp) = comp_status;
860         CMD_SCSI_STATUS(cp) = scsi_status;
861
862         fcport = sp->fcport;
863
864         sense_len = rsp_info_len = resid_len = 0;
865         if (IS_QLA24XX(ha) || IS_QLA25XX(ha)) {
866                 sense_len = le32_to_cpu(sts24->sense_len);
867                 rsp_info_len = le32_to_cpu(sts24->rsp_data_len);
868                 resid_len = le32_to_cpu(sts24->rsp_residual_count);
869                 rsp_info = sts24->data;
870                 sense_data = sts24->data;
871                 host_to_fcp_swap(sts24->data, sizeof(sts24->data));
872         } else {
873                 sense_len = le16_to_cpu(sts->req_sense_length);
874                 rsp_info_len = le16_to_cpu(sts->rsp_info_len);
875                 resid_len = le32_to_cpu(sts->residual_length);
876                 rsp_info = sts->rsp_info;
877                 sense_data = sts->req_sense_data;
878         }
879
880         /* Check for any FCP transport errors. */
881         if (scsi_status & SS_RESPONSE_INFO_LEN_VALID) {
882                 /* Sense data lies beyond any FCP RESPONSE data. */
883                 if (IS_QLA24XX(ha) || IS_QLA25XX(ha))
884                         sense_data += rsp_info_len;
885                 if (rsp_info_len > 3 && rsp_info[3]) {
886                         DEBUG2(printk("scsi(%ld:%d:%d:%d) FCP I/O protocol "
887                             "failure (%x/%02x%02x%02x%02x%02x%02x%02x%02x)..."
888                             "retrying command\n", ha->host_no,
889                             cp->device->channel, cp->device->id,
890                             cp->device->lun, rsp_info_len, rsp_info[0],
891                             rsp_info[1], rsp_info[2], rsp_info[3], rsp_info[4],
892                             rsp_info[5], rsp_info[6], rsp_info[7]));
893
894                         cp->result = DID_BUS_BUSY << 16;
895                         qla2x00_sp_compl(ha, sp);
896                         return;
897                 }
898         }
899
900         /*
901          * Based on Host and scsi status generate status code for Linux
902          */
903         switch (comp_status) {
904         case CS_COMPLETE:
905                 if (scsi_status == 0) {
906                         cp->result = DID_OK << 16;
907                         break;
908                 }
909                 if (scsi_status & (SS_RESIDUAL_UNDER | SS_RESIDUAL_OVER)) {
910                         resid = resid_len;
911                         cp->resid = resid;
912                         CMD_RESID_LEN(cp) = resid;
913
914                         if (!lscsi_status &&
915                             ((unsigned)(cp->request_bufflen - resid) <
916                              cp->underflow)) {
917                                 qla_printk(KERN_INFO, ha,
918                                     "scsi(%ld:%d:%d:%d): Mid-layer underflow "
919                                     "detected (%x of %x bytes)...returning "
920                                     "error status.\n", ha->host_no,
921                                     cp->device->channel, cp->device->id,
922                                     cp->device->lun, resid,
923                                     cp->request_bufflen);
924
925                                 cp->result = DID_ERROR << 16;
926                                 break;
927                         }
928                 }
929                 cp->result = DID_OK << 16 | lscsi_status;
930
931                 if (lscsi_status != SS_CHECK_CONDITION)
932                         break;
933
934                 /* Copy Sense Data into sense buffer. */
935                 memset(cp->sense_buffer, 0, sizeof(cp->sense_buffer));
936
937                 if (!(scsi_status & SS_SENSE_LEN_VALID))
938                         break;
939
940                 if (sense_len >= sizeof(cp->sense_buffer))
941                         sense_len = sizeof(cp->sense_buffer);
942
943                 CMD_ACTUAL_SNSLEN(cp) = sense_len;
944                 sp->request_sense_length = sense_len;
945                 sp->request_sense_ptr = cp->sense_buffer;
946
947                 if (sp->request_sense_length > 32)
948                         sense_len = 32;
949
950                 memcpy(cp->sense_buffer, sense_data, sense_len);
951
952                 sp->request_sense_ptr += sense_len;
953                 sp->request_sense_length -= sense_len;
954                 if (sp->request_sense_length != 0)
955                         ha->status_srb = sp;
956
957                 DEBUG5(printk("%s(): Check condition Sense data, "
958                     "scsi(%ld:%d:%d:%d) cmd=%p pid=%ld\n", __func__,
959                     ha->host_no, cp->device->channel, cp->device->id,
960                     cp->device->lun, cp, cp->serial_number));
961                 if (sense_len)
962                         DEBUG5(qla2x00_dump_buffer(cp->sense_buffer,
963                             CMD_ACTUAL_SNSLEN(cp)));
964                 break;
965
966         case CS_DATA_UNDERRUN:
967                 resid = resid_len;
968                 if (scsi_status & SS_RESIDUAL_UNDER) {
969                         cp->resid = resid;
970                         CMD_RESID_LEN(cp) = resid;
971                 } else {
972                         DEBUG2(printk(KERN_INFO
973                             "scsi(%ld:%d:%d) UNDERRUN status detected "
974                             "0x%x-0x%x.\n", ha->host_no, cp->device->id,
975                             cp->device->lun, comp_status, scsi_status));
976
977                 }
978
979                 /*
980                  * Check to see if SCSI Status is non zero. If so report SCSI
981                  * Status.
982                  */
983                 if (lscsi_status != 0) {
984                         cp->result = DID_OK << 16 | lscsi_status;
985
986                         if (lscsi_status != SS_CHECK_CONDITION)
987                                 break;
988
989                         /* Copy Sense Data into sense buffer */
990                         memset(cp->sense_buffer, 0, sizeof(cp->sense_buffer));
991
992                         if (!(scsi_status & SS_SENSE_LEN_VALID))
993                                 break;
994
995                         if (sense_len >= sizeof(cp->sense_buffer))
996                                 sense_len = sizeof(cp->sense_buffer);
997
998                         CMD_ACTUAL_SNSLEN(cp) = sense_len;
999                         sp->request_sense_length = sense_len;
1000                         sp->request_sense_ptr = cp->sense_buffer;
1001
1002                         if (sp->request_sense_length > 32)
1003                                 sense_len = 32;
1004
1005                         memcpy(cp->sense_buffer, sense_data, sense_len);
1006
1007                         sp->request_sense_ptr += sense_len;
1008                         sp->request_sense_length -= sense_len;
1009                         if (sp->request_sense_length != 0)
1010                                 ha->status_srb = sp;
1011
1012                         DEBUG5(printk("%s(): Check condition Sense data, "
1013                             "scsi(%ld:%d:%d:%d) cmd=%p pid=%ld\n",
1014                             __func__, ha->host_no, cp->device->channel,
1015                             cp->device->id, cp->device->lun, cp,
1016                             cp->serial_number));
1017
1018                         if (sense_len)
1019                                 DEBUG5(qla2x00_dump_buffer(cp->sense_buffer,
1020                                     CMD_ACTUAL_SNSLEN(cp)));
1021                 } else {
1022                         /*
1023                          * If RISC reports underrun and target does not report
1024                          * it then we must have a lost frame, so tell upper
1025                          * layer to retry it by reporting a bus busy.
1026                          */
1027                         if (!(scsi_status & SS_RESIDUAL_UNDER)) {
1028                                 DEBUG2(printk("scsi(%ld:%d:%d:%d) Dropped "
1029                                     "frame(s) detected (%x of %x bytes)..."
1030                                     "retrying command.\n", ha->host_no,
1031                                     cp->device->channel, cp->device->id,
1032                                     cp->device->lun, resid,
1033                                     cp->request_bufflen));
1034
1035                                 cp->result = DID_BUS_BUSY << 16;
1036                                 break;
1037                         }
1038
1039                         /* Handle mid-layer underflow */
1040                         if ((unsigned)(cp->request_bufflen - resid) <
1041                             cp->underflow) {
1042                                 qla_printk(KERN_INFO, ha,
1043                                     "scsi(%ld:%d:%d:%d): Mid-layer underflow "
1044                                     "detected (%x of %x bytes)...returning "
1045                                     "error status.\n", ha->host_no,
1046                                     cp->device->channel, cp->device->id,
1047                                     cp->device->lun, resid,
1048                                     cp->request_bufflen);
1049
1050                                 cp->result = DID_ERROR << 16;
1051                                 break;
1052                         }
1053
1054                         /* Everybody online, looking good... */
1055                         cp->result = DID_OK << 16;
1056                 }
1057                 break;
1058
1059         case CS_DATA_OVERRUN:
1060                 DEBUG2(printk(KERN_INFO
1061                     "scsi(%ld:%d:%d): OVERRUN status detected 0x%x-0x%x\n",
1062                     ha->host_no, cp->device->id, cp->device->lun, comp_status,
1063                     scsi_status));
1064                 DEBUG2(printk(KERN_INFO
1065                     "CDB: 0x%x 0x%x 0x%x 0x%x 0x%x 0x%x\n",
1066                     cp->cmnd[0], cp->cmnd[1], cp->cmnd[2], cp->cmnd[3],
1067                     cp->cmnd[4], cp->cmnd[5]));
1068                 DEBUG2(printk(KERN_INFO
1069                     "PID=0x%lx req=0x%x xtra=0x%x -- returning DID_ERROR "
1070                     "status!\n",
1071                     cp->serial_number, cp->request_bufflen, resid_len));
1072
1073                 cp->result = DID_ERROR << 16;
1074                 break;
1075
1076         case CS_PORT_LOGGED_OUT:
1077         case CS_PORT_CONFIG_CHG:
1078         case CS_PORT_BUSY:
1079         case CS_INCOMPLETE:
1080         case CS_PORT_UNAVAILABLE:
1081                 /*
1082                  * If the port is in Target Down state, return all IOs for this
1083                  * Target with DID_NO_CONNECT ELSE Queue the IOs in the
1084                  * retry_queue.
1085                  */
1086                 DEBUG2(printk("scsi(%ld:%d:%d): status_entry: Port Down "
1087                     "pid=%ld, compl status=0x%x, port state=0x%x\n",
1088                     ha->host_no, cp->device->id, cp->device->lun,
1089                     cp->serial_number, comp_status,
1090                     atomic_read(&fcport->state)));
1091
1092                 cp->result = DID_BUS_BUSY << 16;
1093                 if (atomic_read(&fcport->state) == FCS_ONLINE) {
1094                         qla2x00_mark_device_lost(ha, fcport, 1, 1);
1095                 }
1096                 break;
1097
1098         case CS_RESET:
1099                 DEBUG2(printk(KERN_INFO
1100                     "scsi(%ld): RESET status detected 0x%x-0x%x.\n",
1101                     ha->host_no, comp_status, scsi_status));
1102
1103                 cp->result = DID_RESET << 16;
1104                 break;
1105
1106         case CS_ABORTED:
1107                 /*
1108                  * hv2.19.12 - DID_ABORT does not retry the request if we
1109                  * aborted this request then abort otherwise it must be a
1110                  * reset.
1111                  */
1112                 DEBUG2(printk(KERN_INFO
1113                     "scsi(%ld): ABORT status detected 0x%x-0x%x.\n",
1114                     ha->host_no, comp_status, scsi_status));
1115
1116                 cp->result = DID_RESET << 16;
1117                 break;
1118
1119         case CS_TIMEOUT:
1120                 cp->result = DID_BUS_BUSY << 16;
1121
1122                 if (IS_QLA24XX(ha) || IS_QLA25XX(ha)) {
1123                         DEBUG2(printk(KERN_INFO
1124                             "scsi(%ld:%d:%d:%d): TIMEOUT status detected "
1125                             "0x%x-0x%x\n", ha->host_no, cp->device->channel,
1126                             cp->device->id, cp->device->lun, comp_status,
1127                             scsi_status));
1128                         break;
1129                 }
1130                 DEBUG2(printk(KERN_INFO
1131                     "scsi(%ld:%d:%d:%d): TIMEOUT status detected 0x%x-0x%x "
1132                     "sflags=%x.\n", ha->host_no, cp->device->channel,
1133                     cp->device->id, cp->device->lun, comp_status, scsi_status,
1134                     le16_to_cpu(sts->status_flags)));
1135
1136                 /* Check to see if logout occurred. */
1137                 if ((le16_to_cpu(sts->status_flags) & SF_LOGOUT_SENT))
1138                         qla2x00_mark_device_lost(ha, fcport, 1, 1);
1139                 break;
1140
1141         case CS_QUEUE_FULL:
1142                 DEBUG2(printk(KERN_INFO
1143                     "scsi(%ld): QUEUE FULL status detected 0x%x-0x%x.\n",
1144                     ha->host_no, comp_status, scsi_status));
1145
1146                 /* SCSI Mid-Layer handles device queue full */
1147
1148                 cp->result = DID_OK << 16 | lscsi_status;
1149
1150                 break;
1151
1152         default:
1153                 DEBUG3(printk("scsi(%ld): Error detected (unknown status) "
1154                     "0x%x-0x%x.\n", ha->host_no, comp_status, scsi_status));
1155                 qla_printk(KERN_INFO, ha,
1156                     "Unknown status detected 0x%x-0x%x.\n",
1157                     comp_status, scsi_status);
1158
1159                 cp->result = DID_ERROR << 16;
1160                 break;
1161         }
1162
1163         /* Place command on done queue. */
1164         if (ha->status_srb == NULL)
1165                 qla2x00_sp_compl(ha, sp);
1166 }
1167
1168 /**
1169  * qla2x00_status_cont_entry() - Process a Status Continuations entry.
1170  * @ha: SCSI driver HA context
1171  * @pkt: Entry pointer
1172  *
1173  * Extended sense data.
1174  */
1175 static void
1176 qla2x00_status_cont_entry(scsi_qla_host_t *ha, sts_cont_entry_t *pkt)
1177 {
1178         uint8_t         sense_sz = 0;
1179         srb_t           *sp = ha->status_srb;
1180         struct scsi_cmnd *cp;
1181
1182         if (sp != NULL && sp->request_sense_length != 0) {
1183                 cp = sp->cmd;
1184                 if (cp == NULL) {
1185                         DEBUG2(printk("%s(): Cmd already returned back to OS "
1186                             "sp=%p sp->state:%d\n", __func__, sp, sp->state));
1187                         qla_printk(KERN_INFO, ha,
1188                             "cmd is NULL: already returned to OS (sp=%p)\n",
1189                             sp);
1190
1191                         ha->status_srb = NULL;
1192                         return;
1193                 }
1194
1195                 if (sp->request_sense_length > sizeof(pkt->data)) {
1196                         sense_sz = sizeof(pkt->data);
1197                 } else {
1198                         sense_sz = sp->request_sense_length;
1199                 }
1200
1201                 /* Move sense data. */
1202                 if (IS_QLA24XX(ha) || IS_QLA25XX(ha))
1203                         host_to_fcp_swap(pkt->data, sizeof(pkt->data));
1204                 memcpy(sp->request_sense_ptr, pkt->data, sense_sz);
1205                 DEBUG5(qla2x00_dump_buffer(sp->request_sense_ptr, sense_sz));
1206
1207                 sp->request_sense_ptr += sense_sz;
1208                 sp->request_sense_length -= sense_sz;
1209
1210                 /* Place command on done queue. */
1211                 if (sp->request_sense_length == 0) {
1212                         ha->status_srb = NULL;
1213                         qla2x00_sp_compl(ha, sp);
1214                 }
1215         }
1216 }
1217
1218 /**
1219  * qla2x00_error_entry() - Process an error entry.
1220  * @ha: SCSI driver HA context
1221  * @pkt: Entry pointer
1222  */
1223 static void
1224 qla2x00_error_entry(scsi_qla_host_t *ha, sts_entry_t *pkt)
1225 {
1226         srb_t *sp;
1227
1228 #if defined(QL_DEBUG_LEVEL_2)
1229         if (pkt->entry_status & RF_INV_E_ORDER)
1230                 qla_printk(KERN_ERR, ha, "%s: Invalid Entry Order\n", __func__);
1231         else if (pkt->entry_status & RF_INV_E_COUNT)
1232                 qla_printk(KERN_ERR, ha, "%s: Invalid Entry Count\n", __func__);
1233         else if (pkt->entry_status & RF_INV_E_PARAM)
1234                 qla_printk(KERN_ERR, ha,
1235                     "%s: Invalid Entry Parameter\n", __func__);
1236         else if (pkt->entry_status & RF_INV_E_TYPE)
1237                 qla_printk(KERN_ERR, ha, "%s: Invalid Entry Type\n", __func__);
1238         else if (pkt->entry_status & RF_BUSY)
1239                 qla_printk(KERN_ERR, ha, "%s: Busy\n", __func__);
1240         else
1241                 qla_printk(KERN_ERR, ha, "%s: UNKNOWN flag error\n", __func__);
1242 #endif
1243
1244         /* Validate handle. */
1245         if (pkt->handle < MAX_OUTSTANDING_COMMANDS)
1246                 sp = ha->outstanding_cmds[pkt->handle];
1247         else
1248                 sp = NULL;
1249
1250         if (sp) {
1251                 /* Free outstanding command slot. */
1252                 ha->outstanding_cmds[pkt->handle] = NULL;
1253
1254                 /* Bad payload or header */
1255                 if (pkt->entry_status &
1256                     (RF_INV_E_ORDER | RF_INV_E_COUNT |
1257                      RF_INV_E_PARAM | RF_INV_E_TYPE)) {
1258                         sp->cmd->result = DID_ERROR << 16;
1259                 } else if (pkt->entry_status & RF_BUSY) {
1260                         sp->cmd->result = DID_BUS_BUSY << 16;
1261                 } else {
1262                         sp->cmd->result = DID_ERROR << 16;
1263                 }
1264                 qla2x00_sp_compl(ha, sp);
1265
1266         } else if (pkt->entry_type == COMMAND_A64_TYPE || pkt->entry_type ==
1267             COMMAND_TYPE || pkt->entry_type == COMMAND_TYPE_7) {
1268                 DEBUG2(printk("scsi(%ld): Error entry - invalid handle\n",
1269                     ha->host_no));
1270                 qla_printk(KERN_WARNING, ha,
1271                     "Error entry - invalid handle\n");
1272
1273                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
1274                 if (ha->dpc_wait && !ha->dpc_active)
1275                         up(ha->dpc_wait);
1276         }
1277 }
1278
1279 /**
1280  * qla2x00_ms_entry() - Process a Management Server entry.
1281  * @ha: SCSI driver HA context
1282  * @index: Response queue out pointer
1283  */
1284 static void
1285 qla2x00_ms_entry(scsi_qla_host_t *ha, ms_iocb_entry_t *pkt)
1286 {
1287         srb_t          *sp;
1288
1289         DEBUG3(printk("%s(%ld): pkt=%p pkthandle=%d.\n",
1290             __func__, ha->host_no, pkt, pkt->handle1));
1291
1292         /* Validate handle. */
1293         if (pkt->handle1 < MAX_OUTSTANDING_COMMANDS)
1294                 sp = ha->outstanding_cmds[pkt->handle1];
1295         else
1296                 sp = NULL;
1297
1298         if (sp == NULL) {
1299                 DEBUG2(printk("scsi(%ld): MS entry - invalid handle\n",
1300                     ha->host_no));
1301                 qla_printk(KERN_WARNING, ha, "MS entry - invalid handle\n");
1302
1303                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
1304                 return;
1305         }
1306
1307         CMD_COMPL_STATUS(sp->cmd) = le16_to_cpu(pkt->status);
1308         CMD_ENTRY_STATUS(sp->cmd) = pkt->entry_status;
1309
1310         /* Free outstanding command slot. */
1311         ha->outstanding_cmds[pkt->handle1] = NULL;
1312
1313         qla2x00_sp_compl(ha, sp);
1314 }
1315
1316
1317 /**
1318  * qla24xx_mbx_completion() - Process mailbox command completions.
1319  * @ha: SCSI driver HA context
1320  * @mb0: Mailbox0 register
1321  */
1322 static void
1323 qla24xx_mbx_completion(scsi_qla_host_t *ha, uint16_t mb0)
1324 {
1325         uint16_t        cnt;
1326         uint16_t __iomem *wptr;
1327         struct device_reg_24xx __iomem *reg = &ha->iobase->isp24;
1328
1329         /* Load return mailbox registers. */
1330         ha->flags.mbox_int = 1;
1331         ha->mailbox_out[0] = mb0;
1332         wptr = (uint16_t __iomem *)&reg->mailbox1;
1333
1334         for (cnt = 1; cnt < ha->mbx_count; cnt++) {
1335                 ha->mailbox_out[cnt] = RD_REG_WORD(wptr);
1336                 wptr++;
1337         }
1338
1339         if (ha->mcp) {
1340                 DEBUG3(printk("%s(%ld): Got mailbox completion. cmd=%x.\n",
1341                     __func__, ha->host_no, ha->mcp->mb[0]));
1342         } else {
1343                 DEBUG2_3(printk("%s(%ld): MBX pointer ERROR!\n",
1344                     __func__, ha->host_no));
1345         }
1346 }
1347
1348 /**
1349  * qla24xx_process_response_queue() - Process response queue entries.
1350  * @ha: SCSI driver HA context
1351  */
1352 void
1353 qla24xx_process_response_queue(struct scsi_qla_host *ha)
1354 {
1355         struct device_reg_24xx __iomem *reg = &ha->iobase->isp24;
1356         struct sts_entry_24xx *pkt;
1357
1358         if (!ha->flags.online)
1359                 return;
1360
1361         while (ha->response_ring_ptr->signature != RESPONSE_PROCESSED) {
1362                 pkt = (struct sts_entry_24xx *)ha->response_ring_ptr;
1363
1364                 ha->rsp_ring_index++;
1365                 if (ha->rsp_ring_index == ha->response_q_length) {
1366                         ha->rsp_ring_index = 0;
1367                         ha->response_ring_ptr = ha->response_ring;
1368                 } else {
1369                         ha->response_ring_ptr++;
1370                 }
1371
1372                 if (pkt->entry_status != 0) {
1373                         DEBUG3(printk(KERN_INFO
1374                             "scsi(%ld): Process error entry.\n", ha->host_no));
1375
1376                         qla2x00_error_entry(ha, (sts_entry_t *) pkt);
1377                         ((response_t *)pkt)->signature = RESPONSE_PROCESSED;
1378                         wmb();
1379                         continue;
1380                 }
1381
1382                 switch (pkt->entry_type) {
1383                 case STATUS_TYPE:
1384                         qla2x00_status_entry(ha, pkt);
1385                         break;
1386                 case STATUS_CONT_TYPE:
1387                         qla2x00_status_cont_entry(ha, (sts_cont_entry_t *)pkt);
1388                         break;
1389                 case MS_IOCB_TYPE:
1390                         qla24xx_ms_entry(ha, (struct ct_entry_24xx *)pkt);
1391                         break;
1392                 default:
1393                         /* Type Not Supported. */
1394                         DEBUG4(printk(KERN_WARNING
1395                             "scsi(%ld): Received unknown response pkt type %x "
1396                             "entry status=%x.\n",
1397                             ha->host_no, pkt->entry_type, pkt->entry_status));
1398                         break;
1399                 }
1400                 ((response_t *)pkt)->signature = RESPONSE_PROCESSED;
1401                 wmb();
1402         }
1403
1404         /* Adjust ring index */
1405         WRT_REG_DWORD(&reg->rsp_q_out, ha->rsp_ring_index);
1406 }
1407
1408 /**
1409  * qla24xx_intr_handler() - Process interrupts for the ISP23xx and ISP63xx.
1410  * @irq:
1411  * @dev_id: SCSI driver HA context
1412  * @regs:
1413  *
1414  * Called by system whenever the host adapter generates an interrupt.
1415  *
1416  * Returns handled flag.
1417  */
1418 irqreturn_t
1419 qla24xx_intr_handler(int irq, void *dev_id, struct pt_regs *regs)
1420 {
1421         scsi_qla_host_t *ha;
1422         struct device_reg_24xx __iomem *reg;
1423         int             status;
1424         unsigned long   flags;
1425         unsigned long   iter;
1426         uint32_t        stat;
1427         uint32_t        hccr;
1428         uint16_t        mb[4];
1429
1430         ha = (scsi_qla_host_t *) dev_id;
1431         if (!ha) {
1432                 printk(KERN_INFO
1433                     "%s(): NULL host pointer\n", __func__);
1434                 return IRQ_NONE;
1435         }
1436
1437         reg = &ha->iobase->isp24;
1438         status = 0;
1439
1440         spin_lock_irqsave(&ha->hardware_lock, flags);
1441         for (iter = 50; iter--; ) {
1442                 stat = RD_REG_DWORD(&reg->host_status);
1443                 if (stat & HSRX_RISC_PAUSED) {
1444                         hccr = RD_REG_DWORD(&reg->hccr);
1445
1446                         qla_printk(KERN_INFO, ha, "RISC paused -- HCCR=%x, "
1447                             "Dumping firmware!\n", hccr);
1448                         qla24xx_fw_dump(ha, 1);
1449
1450                         set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
1451                         break;
1452                 } else if ((stat & HSRX_RISC_INT) == 0)
1453                         break;
1454
1455                 switch (stat & 0xff) {
1456                 case 0x1:
1457                 case 0x2:
1458                 case 0x10:
1459                 case 0x11:
1460                         qla24xx_mbx_completion(ha, MSW(stat));
1461                         status |= MBX_INTERRUPT;
1462
1463                         break;
1464                 case 0x12:
1465                         mb[0] = MSW(stat);
1466                         mb[1] = RD_REG_WORD(&reg->mailbox1);
1467                         mb[2] = RD_REG_WORD(&reg->mailbox2);
1468                         mb[3] = RD_REG_WORD(&reg->mailbox3);
1469                         qla2x00_async_event(ha, mb);
1470                         break;
1471                 case 0x13:
1472                         qla24xx_process_response_queue(ha);
1473                         break;
1474                 default:
1475                         DEBUG2(printk("scsi(%ld): Unrecognized interrupt type "
1476                             "(%d).\n",
1477                             ha->host_no, stat & 0xff));
1478                         break;
1479                 }
1480                 WRT_REG_DWORD(&reg->hccr, HCCRX_CLR_RISC_INT);
1481                 RD_REG_DWORD_RELAXED(&reg->hccr);
1482         }
1483         spin_unlock_irqrestore(&ha->hardware_lock, flags);
1484
1485         if (test_bit(MBX_INTR_WAIT, &ha->mbx_cmd_flags) &&
1486             (status & MBX_INTERRUPT) && ha->flags.mbox_int) {
1487                 spin_lock_irqsave(&ha->mbx_reg_lock, flags);
1488
1489                 set_bit(MBX_INTERRUPT, &ha->mbx_cmd_flags);
1490                 up(&ha->mbx_intr_sem);
1491
1492                 spin_unlock_irqrestore(&ha->mbx_reg_lock, flags);
1493         }
1494
1495         return IRQ_HANDLED;
1496 }
1497
1498 /**
1499  * qla24xx_ms_entry() - Process a Management Server entry.
1500  * @ha: SCSI driver HA context
1501  * @index: Response queue out pointer
1502  */
1503 static void
1504 qla24xx_ms_entry(scsi_qla_host_t *ha, struct ct_entry_24xx *pkt)
1505 {
1506         srb_t          *sp;
1507
1508         DEBUG3(printk("%s(%ld): pkt=%p pkthandle=%d.\n",
1509             __func__, ha->host_no, pkt, pkt->handle));
1510
1511         DEBUG9(printk("%s: ct pkt dump:\n", __func__);)
1512         DEBUG9(qla2x00_dump_buffer((void *)pkt, sizeof(struct ct_entry_24xx));)
1513
1514         /* Validate handle. */
1515         if (pkt->handle < MAX_OUTSTANDING_COMMANDS)
1516                 sp = ha->outstanding_cmds[pkt->handle];
1517         else
1518                 sp = NULL;
1519
1520         if (sp == NULL) {
1521                 DEBUG2(printk("scsi(%ld): MS entry - invalid handle\n",
1522                     ha->host_no));
1523                 DEBUG10(printk("scsi(%ld): MS entry - invalid handle\n",
1524                     ha->host_no));
1525                 qla_printk(KERN_WARNING, ha, "MS entry - invalid handle %d\n",
1526                     pkt->handle);
1527
1528                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
1529                 return;
1530         }
1531
1532         CMD_COMPL_STATUS(sp->cmd) = le16_to_cpu(pkt->comp_status);
1533         CMD_ENTRY_STATUS(sp->cmd) = pkt->entry_status;
1534
1535         /* Free outstanding command slot. */
1536         ha->outstanding_cmds[pkt->handle] = NULL;
1537
1538         qla2x00_sp_compl(ha, sp);
1539 }
1540