[SCSI] don't build scsi_dma_{map,unmap} for !HAS_DMA
[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 #include <scsi/scsi_tcq.h>
10
11 static void qla2x00_mbx_completion(scsi_qla_host_t *, uint16_t);
12 static void qla2x00_process_completed_request(struct scsi_qla_host *, uint32_t);
13 static void qla2x00_status_entry(scsi_qla_host_t *, void *);
14 static void qla2x00_status_cont_entry(scsi_qla_host_t *, sts_cont_entry_t *);
15 static void qla2x00_error_entry(scsi_qla_host_t *, sts_entry_t *);
16 static void qla2x00_ms_entry(scsi_qla_host_t *, ms_iocb_entry_t *);
17
18 static void qla24xx_ms_entry(scsi_qla_host_t *, struct ct_entry_24xx *);
19
20 /**
21  * qla2100_intr_handler() - Process interrupts for the ISP2100 and ISP2200.
22  * @irq:
23  * @dev_id: SCSI driver HA context
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)
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                 set_bit(MBX_INTERRUPT, &ha->mbx_cmd_flags);
89                 up(&ha->mbx_intr_sem);
90         }
91
92         return (IRQ_HANDLED);
93 }
94
95 /**
96  * qla2300_intr_handler() - Process interrupts for the ISP23xx and ISP63xx.
97  * @irq:
98  * @dev_id: SCSI driver HA context
99  *
100  * Called by system whenever the host adapter generates an interrupt.
101  *
102  * Returns handled flag.
103  */
104 irqreturn_t
105 qla2300_intr_handler(int irq, void *dev_id)
106 {
107         scsi_qla_host_t *ha;
108         struct device_reg_2xxx __iomem *reg;
109         int             status;
110         unsigned long   flags;
111         unsigned long   iter;
112         uint32_t        stat;
113         uint16_t        hccr;
114         uint16_t        mb[4];
115
116         ha = (scsi_qla_host_t *) dev_id;
117         if (!ha) {
118                 printk(KERN_INFO
119                     "%s(): NULL host pointer\n", __func__);
120                 return (IRQ_NONE);
121         }
122
123         reg = &ha->iobase->isp;
124         status = 0;
125
126         spin_lock_irqsave(&ha->hardware_lock, flags);
127         for (iter = 50; iter--; ) {
128                 stat = RD_REG_DWORD(&reg->u.isp2300.host_status);
129                 if (stat & HSR_RISC_PAUSED) {
130                         hccr = RD_REG_WORD(&reg->hccr);
131                         if (hccr & (BIT_15 | BIT_13 | BIT_11 | BIT_8))
132                                 qla_printk(KERN_INFO, ha, "Parity error -- "
133                                     "HCCR=%x, Dumping firmware!\n", hccr);
134                         else
135                                 qla_printk(KERN_INFO, ha, "RISC paused -- "
136                                     "HCCR=%x, Dumping firmware!\n", hccr);
137
138                         /*
139                          * Issue a "HARD" reset in order for the RISC
140                          * interrupt bit to be cleared.  Schedule a big
141                          * hammmer to get out of the RISC PAUSED state.
142                          */
143                         WRT_REG_WORD(&reg->hccr, HCCR_RESET_RISC);
144                         RD_REG_WORD(&reg->hccr);
145
146                         ha->isp_ops.fw_dump(ha, 1);
147                         set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
148                         break;
149                 } else if ((stat & HSR_RISC_INT) == 0)
150                         break;
151
152                 switch (stat & 0xff) {
153                 case 0x1:
154                 case 0x2:
155                 case 0x10:
156                 case 0x11:
157                         qla2x00_mbx_completion(ha, MSW(stat));
158                         status |= MBX_INTERRUPT;
159
160                         /* Release mailbox registers. */
161                         WRT_REG_WORD(&reg->semaphore, 0);
162                         break;
163                 case 0x12:
164                         mb[0] = MSW(stat);
165                         mb[1] = RD_MAILBOX_REG(ha, reg, 1);
166                         mb[2] = RD_MAILBOX_REG(ha, reg, 2);
167                         mb[3] = RD_MAILBOX_REG(ha, reg, 3);
168                         qla2x00_async_event(ha, mb);
169                         break;
170                 case 0x13:
171                         qla2x00_process_response_queue(ha);
172                         break;
173                 case 0x15:
174                         mb[0] = MBA_CMPLT_1_16BIT;
175                         mb[1] = MSW(stat);
176                         qla2x00_async_event(ha, mb);
177                         break;
178                 case 0x16:
179                         mb[0] = MBA_SCSI_COMPLETION;
180                         mb[1] = MSW(stat);
181                         mb[2] = RD_MAILBOX_REG(ha, reg, 2);
182                         qla2x00_async_event(ha, mb);
183                         break;
184                 default:
185                         DEBUG2(printk("scsi(%ld): Unrecognized interrupt type "
186                             "(%d).\n",
187                             ha->host_no, stat & 0xff));
188                         break;
189                 }
190                 WRT_REG_WORD(&reg->hccr, HCCR_CLR_RISC_INT);
191                 RD_REG_WORD_RELAXED(&reg->hccr);
192         }
193         spin_unlock_irqrestore(&ha->hardware_lock, flags);
194
195         if (test_bit(MBX_INTR_WAIT, &ha->mbx_cmd_flags) &&
196             (status & MBX_INTERRUPT) && ha->flags.mbox_int) {
197                 set_bit(MBX_INTERRUPT, &ha->mbx_cmd_flags);
198                 up(&ha->mbx_intr_sem);
199         }
200
201         return (IRQ_HANDLED);
202 }
203
204 /**
205  * qla2x00_mbx_completion() - Process mailbox command completions.
206  * @ha: SCSI driver HA context
207  * @mb0: Mailbox0 register
208  */
209 static void
210 qla2x00_mbx_completion(scsi_qla_host_t *ha, uint16_t mb0)
211 {
212         uint16_t        cnt;
213         uint16_t __iomem *wptr;
214         struct device_reg_2xxx __iomem *reg = &ha->iobase->isp;
215
216         /* Load return mailbox registers. */
217         ha->flags.mbox_int = 1;
218         ha->mailbox_out[0] = mb0;
219         wptr = (uint16_t __iomem *)MAILBOX_REG(ha, reg, 1);
220
221         for (cnt = 1; cnt < ha->mbx_count; cnt++) {
222                 if (IS_QLA2200(ha) && cnt == 8)
223                         wptr = (uint16_t __iomem *)MAILBOX_REG(ha, reg, 8);
224                 if (cnt == 4 || cnt == 5)
225                         ha->mailbox_out[cnt] = qla2x00_debounce_register(wptr);
226                 else
227                         ha->mailbox_out[cnt] = RD_REG_WORD(wptr);
228
229                 wptr++;
230         }
231
232         if (ha->mcp) {
233                 DEBUG3(printk("%s(%ld): Got mailbox completion. cmd=%x.\n",
234                     __func__, ha->host_no, ha->mcp->mb[0]));
235         } else {
236                 DEBUG2_3(printk("%s(%ld): MBX pointer ERROR!\n",
237                     __func__, ha->host_no));
238         }
239 }
240
241 /**
242  * qla2x00_async_event() - Process aynchronous events.
243  * @ha: SCSI driver HA context
244  * @mb: Mailbox registers (0 - 3)
245  */
246 void
247 qla2x00_async_event(scsi_qla_host_t *ha, uint16_t *mb)
248 {
249 #define LS_UNKNOWN      2
250         static char     *link_speeds[5] = { "1", "2", "?", "4", "10" };
251         char            *link_speed;
252         uint16_t        handle_cnt;
253         uint16_t        cnt;
254         uint32_t        handles[5];
255         struct device_reg_2xxx __iomem *reg = &ha->iobase->isp;
256         uint32_t        rscn_entry, host_pid;
257         uint8_t         rscn_queue_index;
258
259         /* Setup to process RIO completion. */
260         handle_cnt = 0;
261         switch (mb[0]) {
262         case MBA_SCSI_COMPLETION:
263                 handles[0] = le32_to_cpu((uint32_t)((mb[2] << 16) | mb[1]));
264                 handle_cnt = 1;
265                 break;
266         case MBA_CMPLT_1_16BIT:
267                 handles[0] = mb[1];
268                 handle_cnt = 1;
269                 mb[0] = MBA_SCSI_COMPLETION;
270                 break;
271         case MBA_CMPLT_2_16BIT:
272                 handles[0] = mb[1];
273                 handles[1] = mb[2];
274                 handle_cnt = 2;
275                 mb[0] = MBA_SCSI_COMPLETION;
276                 break;
277         case MBA_CMPLT_3_16BIT:
278                 handles[0] = mb[1];
279                 handles[1] = mb[2];
280                 handles[2] = mb[3];
281                 handle_cnt = 3;
282                 mb[0] = MBA_SCSI_COMPLETION;
283                 break;
284         case MBA_CMPLT_4_16BIT:
285                 handles[0] = mb[1];
286                 handles[1] = mb[2];
287                 handles[2] = mb[3];
288                 handles[3] = (uint32_t)RD_MAILBOX_REG(ha, reg, 6);
289                 handle_cnt = 4;
290                 mb[0] = MBA_SCSI_COMPLETION;
291                 break;
292         case MBA_CMPLT_5_16BIT:
293                 handles[0] = mb[1];
294                 handles[1] = mb[2];
295                 handles[2] = mb[3];
296                 handles[3] = (uint32_t)RD_MAILBOX_REG(ha, reg, 6);
297                 handles[4] = (uint32_t)RD_MAILBOX_REG(ha, reg, 7);
298                 handle_cnt = 5;
299                 mb[0] = MBA_SCSI_COMPLETION;
300                 break;
301         case MBA_CMPLT_2_32BIT:
302                 handles[0] = le32_to_cpu((uint32_t)((mb[2] << 16) | mb[1]));
303                 handles[1] = le32_to_cpu(
304                     ((uint32_t)(RD_MAILBOX_REG(ha, reg, 7) << 16)) |
305                     RD_MAILBOX_REG(ha, reg, 6));
306                 handle_cnt = 2;
307                 mb[0] = MBA_SCSI_COMPLETION;
308                 break;
309         default:
310                 break;
311         }
312
313         switch (mb[0]) {
314         case MBA_SCSI_COMPLETION:       /* Fast Post */
315                 if (!ha->flags.online)
316                         break;
317
318                 for (cnt = 0; cnt < handle_cnt; cnt++)
319                         qla2x00_process_completed_request(ha, handles[cnt]);
320                 break;
321
322         case MBA_RESET:                 /* Reset */
323                 DEBUG2(printk("scsi(%ld): Asynchronous RESET.\n", ha->host_no));
324
325                 set_bit(RESET_MARKER_NEEDED, &ha->dpc_flags);
326                 break;
327
328         case MBA_SYSTEM_ERR:            /* System Error */
329                 mb[1] = RD_MAILBOX_REG(ha, reg, 1);
330                 mb[2] = RD_MAILBOX_REG(ha, reg, 2);
331                 mb[3] = RD_MAILBOX_REG(ha, reg, 3);
332
333                 qla_printk(KERN_INFO, ha,
334                     "ISP System Error - mbx1=%xh mbx2=%xh mbx3=%xh.\n",
335                     mb[1], mb[2], mb[3]);
336
337                 ha->isp_ops.fw_dump(ha, 1);
338
339                 if (IS_QLA24XX(ha) || IS_QLA54XX(ha)) {
340                         if (mb[1] == 0 && mb[2] == 0) {
341                                 qla_printk(KERN_ERR, ha,
342                                     "Unrecoverable Hardware Error: adapter "
343                                     "marked OFFLINE!\n");
344                                 ha->flags.online = 0;
345                         } else
346                                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
347                 } else if (mb[1] == 0) {
348                         qla_printk(KERN_INFO, ha,
349                             "Unrecoverable Hardware Error: adapter marked "
350                             "OFFLINE!\n");
351                         ha->flags.online = 0;
352                 } else
353                         set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
354                 break;
355
356         case MBA_REQ_TRANSFER_ERR:      /* Request Transfer Error */
357                 DEBUG2(printk("scsi(%ld): ISP Request Transfer Error.\n",
358                     ha->host_no));
359                 qla_printk(KERN_WARNING, ha, "ISP Request Transfer Error.\n");
360
361                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
362                 break;
363
364         case MBA_RSP_TRANSFER_ERR:      /* Response Transfer Error */
365                 DEBUG2(printk("scsi(%ld): ISP Response Transfer Error.\n",
366                     ha->host_no));
367                 qla_printk(KERN_WARNING, ha, "ISP Response Transfer Error.\n");
368
369                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
370                 break;
371
372         case MBA_WAKEUP_THRES:          /* Request Queue Wake-up */
373                 DEBUG2(printk("scsi(%ld): Asynchronous WAKEUP_THRES.\n",
374                     ha->host_no));
375                 break;
376
377         case MBA_LIP_OCCURRED:          /* Loop Initialization Procedure */
378                 DEBUG2(printk("scsi(%ld): LIP occured (%x).\n", ha->host_no,
379                     mb[1]));
380                 qla_printk(KERN_INFO, ha, "LIP occured (%x).\n", mb[1]);
381
382                 if (atomic_read(&ha->loop_state) != LOOP_DOWN) {
383                         atomic_set(&ha->loop_state, LOOP_DOWN);
384                         atomic_set(&ha->loop_down_timer, LOOP_DOWN_TIME);
385                         qla2x00_mark_all_devices_lost(ha, 1);
386                 }
387
388                 if (ha->parent) {
389                         atomic_set(&ha->vp_state, VP_FAILED);
390                         fc_vport_set_state(ha->fc_vport, FC_VPORT_FAILED);
391                 }
392
393                 set_bit(REGISTER_FC4_NEEDED, &ha->dpc_flags);
394
395                 ha->flags.management_server_logged_in = 0;
396                 break;
397
398         case MBA_LOOP_UP:               /* Loop Up Event */
399                 if (IS_QLA2100(ha) || IS_QLA2200(ha)) {
400                         link_speed = link_speeds[0];
401                         ha->link_data_rate = PORT_SPEED_1GB;
402                 } else {
403                         link_speed = link_speeds[LS_UNKNOWN];
404                         if (mb[1] < 5)
405                                 link_speed = link_speeds[mb[1]];
406                         ha->link_data_rate = mb[1];
407                 }
408
409                 DEBUG2(printk("scsi(%ld): Asynchronous LOOP UP (%s Gbps).\n",
410                     ha->host_no, link_speed));
411                 qla_printk(KERN_INFO, ha, "LOOP UP detected (%s Gbps).\n",
412                     link_speed);
413
414                 ha->flags.management_server_logged_in = 0;
415                 break;
416
417         case MBA_LOOP_DOWN:             /* Loop Down Event */
418                 DEBUG2(printk("scsi(%ld): Asynchronous LOOP DOWN (%x).\n",
419                     ha->host_no, mb[1]));
420                 qla_printk(KERN_INFO, ha, "LOOP DOWN detected (%x).\n", mb[1]);
421
422                 if (atomic_read(&ha->loop_state) != LOOP_DOWN) {
423                         atomic_set(&ha->loop_state, LOOP_DOWN);
424                         atomic_set(&ha->loop_down_timer, LOOP_DOWN_TIME);
425                         ha->device_flags |= DFLG_NO_CABLE;
426                         qla2x00_mark_all_devices_lost(ha, 1);
427                 }
428
429                 if (ha->parent) {
430                         atomic_set(&ha->vp_state, VP_FAILED);
431                         fc_vport_set_state(ha->fc_vport, FC_VPORT_FAILED);
432                 }
433
434                 ha->flags.management_server_logged_in = 0;
435                 ha->link_data_rate = PORT_SPEED_UNKNOWN;
436                 if (ql2xfdmienable)
437                         set_bit(REGISTER_FDMI_NEEDED, &ha->dpc_flags);
438                 break;
439
440         case MBA_LIP_RESET:             /* LIP reset occurred */
441                 DEBUG2(printk("scsi(%ld): Asynchronous LIP RESET (%x).\n",
442                     ha->host_no, mb[1]));
443                 qla_printk(KERN_INFO, ha,
444                     "LIP reset occured (%x).\n", mb[1]);
445
446                 if (atomic_read(&ha->loop_state) != LOOP_DOWN) {
447                         atomic_set(&ha->loop_state, LOOP_DOWN);
448                         atomic_set(&ha->loop_down_timer, LOOP_DOWN_TIME);
449                         qla2x00_mark_all_devices_lost(ha, 1);
450                 }
451
452                 if (ha->parent) {
453                         atomic_set(&ha->vp_state, VP_FAILED);
454                         fc_vport_set_state(ha->fc_vport, FC_VPORT_FAILED);
455                 }
456
457                 set_bit(RESET_MARKER_NEEDED, &ha->dpc_flags);
458
459                 ha->operating_mode = LOOP;
460                 ha->flags.management_server_logged_in = 0;
461                 break;
462
463         case MBA_POINT_TO_POINT:        /* Point-to-Point */
464                 if (IS_QLA2100(ha))
465                         break;
466
467                 DEBUG2(printk("scsi(%ld): Asynchronous P2P MODE received.\n",
468                     ha->host_no));
469
470                 /*
471                  * Until there's a transition from loop down to loop up, treat
472                  * this as loop down only.
473                  */
474                 if (atomic_read(&ha->loop_state) != LOOP_DOWN) {
475                         atomic_set(&ha->loop_state, LOOP_DOWN);
476                         if (!atomic_read(&ha->loop_down_timer))
477                                 atomic_set(&ha->loop_down_timer,
478                                     LOOP_DOWN_TIME);
479                         qla2x00_mark_all_devices_lost(ha, 1);
480                 }
481
482                 if (ha->parent) {
483                         atomic_set(&ha->vp_state, VP_FAILED);
484                         fc_vport_set_state(ha->fc_vport, FC_VPORT_FAILED);
485                 }
486
487                 if (!(test_bit(ABORT_ISP_ACTIVE, &ha->dpc_flags))) {
488                         set_bit(RESET_MARKER_NEEDED, &ha->dpc_flags);
489                 }
490                 set_bit(REGISTER_FC4_NEEDED, &ha->dpc_flags);
491
492                 ha->flags.gpsc_supported = 1;
493                 break;
494
495         case MBA_CHG_IN_CONNECTION:     /* Change in connection mode */
496                 if (IS_QLA2100(ha))
497                         break;
498
499                 DEBUG2(printk("scsi(%ld): Asynchronous Change In Connection "
500                     "received.\n",
501                     ha->host_no));
502                 qla_printk(KERN_INFO, ha,
503                     "Configuration change detected: value=%x.\n", mb[1]);
504
505                 if (atomic_read(&ha->loop_state) != LOOP_DOWN) {
506                         atomic_set(&ha->loop_state, LOOP_DOWN);
507                         if (!atomic_read(&ha->loop_down_timer))
508                                 atomic_set(&ha->loop_down_timer,
509                                     LOOP_DOWN_TIME);
510                         qla2x00_mark_all_devices_lost(ha, 1);
511                 }
512
513                 if (ha->parent) {
514                         atomic_set(&ha->vp_state, VP_FAILED);
515                         fc_vport_set_state(ha->fc_vport, FC_VPORT_FAILED);
516                 }
517
518                 set_bit(LOOP_RESYNC_NEEDED, &ha->dpc_flags);
519                 set_bit(LOCAL_LOOP_UPDATE, &ha->dpc_flags);
520                 break;
521
522         case MBA_PORT_UPDATE:           /* Port database update */
523                 /*
524                  * If PORT UPDATE is global (recieved LIP_OCCURED/LIP_RESET
525                  * event etc. earlier indicating loop is down) then process
526                  * it.  Otherwise ignore it and Wait for RSCN to come in.
527                  */
528                 atomic_set(&ha->loop_down_timer, 0);
529                 if (atomic_read(&ha->loop_state) != LOOP_DOWN &&
530                     atomic_read(&ha->loop_state) != LOOP_DEAD) {
531                         DEBUG2(printk("scsi(%ld): Asynchronous PORT UPDATE "
532                             "ignored %04x/%04x/%04x.\n", ha->host_no, mb[1],
533                             mb[2], mb[3]));
534                         break;
535                 }
536
537                 DEBUG2(printk("scsi(%ld): Asynchronous PORT UPDATE.\n",
538                     ha->host_no));
539                 DEBUG(printk(KERN_INFO
540                     "scsi(%ld): Port database changed %04x %04x %04x.\n",
541                     ha->host_no, mb[1], mb[2], mb[3]));
542
543                 /*
544                  * Mark all devices as missing so we will login again.
545                  */
546                 atomic_set(&ha->loop_state, LOOP_UP);
547
548                 qla2x00_mark_all_devices_lost(ha, 1);
549
550                 ha->flags.rscn_queue_overflow = 1;
551
552                 set_bit(LOOP_RESYNC_NEEDED, &ha->dpc_flags);
553                 set_bit(LOCAL_LOOP_UPDATE, &ha->dpc_flags);
554                 break;
555
556         case MBA_RSCN_UPDATE:           /* State Change Registration */
557                 /* Check if the Vport has issued a SCR */
558                 if (ha->parent && test_bit(VP_SCR_NEEDED, &ha->vp_flags))
559                         break;
560
561                 DEBUG2(printk("scsi(%ld): Asynchronous RSCR UPDATE.\n",
562                     ha->host_no));
563                 DEBUG(printk(KERN_INFO
564                     "scsi(%ld): RSCN database changed -- %04x %04x.\n",
565                     ha->host_no, mb[1], mb[2]));
566
567                 rscn_entry = (mb[1] << 16) | mb[2];
568                 host_pid = (ha->d_id.b.domain << 16) | (ha->d_id.b.area << 8) |
569                     ha->d_id.b.al_pa;
570                 if (rscn_entry == host_pid) {
571                         DEBUG(printk(KERN_INFO
572                             "scsi(%ld): Ignoring RSCN update to local host "
573                             "port ID (%06x)\n",
574                             ha->host_no, host_pid));
575                         break;
576                 }
577
578                 rscn_queue_index = ha->rscn_in_ptr + 1;
579                 if (rscn_queue_index == MAX_RSCN_COUNT)
580                         rscn_queue_index = 0;
581                 if (rscn_queue_index != ha->rscn_out_ptr) {
582                         ha->rscn_queue[ha->rscn_in_ptr] = rscn_entry;
583                         ha->rscn_in_ptr = rscn_queue_index;
584                 } else {
585                         ha->flags.rscn_queue_overflow = 1;
586                 }
587
588                 atomic_set(&ha->loop_state, LOOP_UPDATE);
589                 atomic_set(&ha->loop_down_timer, 0);
590                 ha->flags.management_server_logged_in = 0;
591
592                 set_bit(LOOP_RESYNC_NEEDED, &ha->dpc_flags);
593                 set_bit(RSCN_UPDATE, &ha->dpc_flags);
594                 break;
595
596         /* case MBA_RIO_RESPONSE: */
597         case MBA_ZIO_RESPONSE:
598                 DEBUG2(printk("scsi(%ld): [R|Z]IO update completion.\n",
599                     ha->host_no));
600                 DEBUG(printk(KERN_INFO
601                     "scsi(%ld): [R|Z]IO update completion.\n",
602                     ha->host_no));
603
604                 if (IS_QLA24XX(ha) || IS_QLA54XX(ha))
605                         qla24xx_process_response_queue(ha);
606                 else
607                         qla2x00_process_response_queue(ha);
608                 break;
609
610         case MBA_DISCARD_RND_FRAME:
611                 DEBUG2(printk("scsi(%ld): Discard RND Frame -- %04x %04x "
612                     "%04x.\n", ha->host_no, mb[1], mb[2], mb[3]));
613                 break;
614
615         case MBA_TRACE_NOTIFICATION:
616                 DEBUG2(printk("scsi(%ld): Trace Notification -- %04x %04x.\n",
617                 ha->host_no, mb[1], mb[2]));
618                 break;
619         }
620
621         if (!ha->parent && ha->num_vhosts)
622                 qla2x00_alert_all_vps(ha, mb);
623 }
624
625 static void
626 qla2x00_adjust_sdev_qdepth_up(struct scsi_device *sdev, void *data)
627 {
628         fc_port_t *fcport = data;
629
630         if (fcport->ha->max_q_depth <= sdev->queue_depth)
631                 return;
632
633         if (sdev->ordered_tags)
634                 scsi_adjust_queue_depth(sdev, MSG_ORDERED_TAG,
635                     sdev->queue_depth + 1);
636         else
637                 scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG,
638                     sdev->queue_depth + 1);
639
640         fcport->last_ramp_up = jiffies;
641
642         DEBUG2(qla_printk(KERN_INFO, fcport->ha,
643             "scsi(%ld:%d:%d:%d): Queue depth adjusted-up to %d.\n",
644             fcport->ha->host_no, sdev->channel, sdev->id, sdev->lun,
645             sdev->queue_depth));
646 }
647
648 static void
649 qla2x00_adjust_sdev_qdepth_down(struct scsi_device *sdev, void *data)
650 {
651         fc_port_t *fcport = data;
652
653         if (!scsi_track_queue_full(sdev, sdev->queue_depth - 1))
654                 return;
655
656         DEBUG2(qla_printk(KERN_INFO, fcport->ha,
657             "scsi(%ld:%d:%d:%d): Queue depth adjusted-down to %d.\n",
658             fcport->ha->host_no, sdev->channel, sdev->id, sdev->lun,
659             sdev->queue_depth));
660 }
661
662 static inline void
663 qla2x00_ramp_up_queue_depth(scsi_qla_host_t *ha, srb_t *sp)
664 {
665         fc_port_t *fcport;
666         struct scsi_device *sdev;
667
668         sdev = sp->cmd->device;
669         if (sdev->queue_depth >= ha->max_q_depth)
670                 return;
671
672         fcport = sp->fcport;
673         if (time_before(jiffies,
674             fcport->last_ramp_up + ql2xqfullrampup * HZ))
675                 return;
676         if (time_before(jiffies,
677             fcport->last_queue_full + ql2xqfullrampup * HZ))
678                 return;
679
680         starget_for_each_device(sdev->sdev_target, fcport,
681             qla2x00_adjust_sdev_qdepth_up);
682 }
683
684 /**
685  * qla2x00_process_completed_request() - Process a Fast Post response.
686  * @ha: SCSI driver HA context
687  * @index: SRB index
688  */
689 static void
690 qla2x00_process_completed_request(struct scsi_qla_host *ha, uint32_t index)
691 {
692         srb_t *sp;
693
694         /* Validate handle. */
695         if (index >= MAX_OUTSTANDING_COMMANDS) {
696                 DEBUG2(printk("scsi(%ld): Invalid SCSI completion handle %d.\n",
697                     ha->host_no, index));
698                 qla_printk(KERN_WARNING, ha,
699                     "Invalid SCSI completion handle %d.\n", index);
700
701                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
702                 return;
703         }
704
705         sp = ha->outstanding_cmds[index];
706         if (sp) {
707                 /* Free outstanding command slot. */
708                 ha->outstanding_cmds[index] = NULL;
709
710                 CMD_COMPL_STATUS(sp->cmd) = 0L;
711                 CMD_SCSI_STATUS(sp->cmd) = 0L;
712
713                 /* Save ISP completion status */
714                 sp->cmd->result = DID_OK << 16;
715
716                 qla2x00_ramp_up_queue_depth(ha, sp);
717                 qla2x00_sp_compl(ha, sp);
718         } else {
719                 DEBUG2(printk("scsi(%ld): Invalid ISP SCSI completion handle\n",
720                     ha->host_no));
721                 qla_printk(KERN_WARNING, ha,
722                     "Invalid ISP SCSI completion handle\n");
723
724                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
725         }
726 }
727
728 /**
729  * qla2x00_process_response_queue() - Process response queue entries.
730  * @ha: SCSI driver HA context
731  */
732 void
733 qla2x00_process_response_queue(struct scsi_qla_host *ha)
734 {
735         struct device_reg_2xxx __iomem *reg = &ha->iobase->isp;
736         sts_entry_t     *pkt;
737         uint16_t        handle_cnt;
738         uint16_t        cnt;
739
740         if (!ha->flags.online)
741                 return;
742
743         while (ha->response_ring_ptr->signature != RESPONSE_PROCESSED) {
744                 pkt = (sts_entry_t *)ha->response_ring_ptr;
745
746                 ha->rsp_ring_index++;
747                 if (ha->rsp_ring_index == ha->response_q_length) {
748                         ha->rsp_ring_index = 0;
749                         ha->response_ring_ptr = ha->response_ring;
750                 } else {
751                         ha->response_ring_ptr++;
752                 }
753
754                 if (pkt->entry_status != 0) {
755                         DEBUG3(printk(KERN_INFO
756                             "scsi(%ld): Process error entry.\n", ha->host_no));
757
758                         qla2x00_error_entry(ha, pkt);
759                         ((response_t *)pkt)->signature = RESPONSE_PROCESSED;
760                         wmb();
761                         continue;
762                 }
763
764                 switch (pkt->entry_type) {
765                 case STATUS_TYPE:
766                         qla2x00_status_entry(ha, pkt);
767                         break;
768                 case STATUS_TYPE_21:
769                         handle_cnt = ((sts21_entry_t *)pkt)->handle_count;
770                         for (cnt = 0; cnt < handle_cnt; cnt++) {
771                                 qla2x00_process_completed_request(ha,
772                                     ((sts21_entry_t *)pkt)->handle[cnt]);
773                         }
774                         break;
775                 case STATUS_TYPE_22:
776                         handle_cnt = ((sts22_entry_t *)pkt)->handle_count;
777                         for (cnt = 0; cnt < handle_cnt; cnt++) {
778                                 qla2x00_process_completed_request(ha,
779                                     ((sts22_entry_t *)pkt)->handle[cnt]);
780                         }
781                         break;
782                 case STATUS_CONT_TYPE:
783                         qla2x00_status_cont_entry(ha, (sts_cont_entry_t *)pkt);
784                         break;
785                 case MS_IOCB_TYPE:
786                         qla2x00_ms_entry(ha, (ms_iocb_entry_t *)pkt);
787                         break;
788                 default:
789                         /* Type Not Supported. */
790                         DEBUG4(printk(KERN_WARNING
791                             "scsi(%ld): Received unknown response pkt type %x "
792                             "entry status=%x.\n",
793                             ha->host_no, pkt->entry_type, pkt->entry_status));
794                         break;
795                 }
796                 ((response_t *)pkt)->signature = RESPONSE_PROCESSED;
797                 wmb();
798         }
799
800         /* Adjust ring index */
801         WRT_REG_WORD(ISP_RSP_Q_OUT(ha, reg), ha->rsp_ring_index);
802 }
803
804 /**
805  * qla2x00_status_entry() - Process a Status IOCB entry.
806  * @ha: SCSI driver HA context
807  * @pkt: Entry pointer
808  */
809 static void
810 qla2x00_status_entry(scsi_qla_host_t *ha, void *pkt)
811 {
812         srb_t           *sp;
813         fc_port_t       *fcport;
814         struct scsi_cmnd *cp;
815         sts_entry_t *sts;
816         struct sts_entry_24xx *sts24;
817         uint16_t        comp_status;
818         uint16_t        scsi_status;
819         uint8_t         lscsi_status;
820         int32_t         resid;
821         uint32_t        sense_len, rsp_info_len, resid_len, fw_resid_len;
822         uint8_t         *rsp_info, *sense_data;
823
824         sts = (sts_entry_t *) pkt;
825         sts24 = (struct sts_entry_24xx *) pkt;
826         if (IS_QLA24XX(ha) || IS_QLA54XX(ha)) {
827                 comp_status = le16_to_cpu(sts24->comp_status);
828                 scsi_status = le16_to_cpu(sts24->scsi_status) & SS_MASK;
829         } else {
830                 comp_status = le16_to_cpu(sts->comp_status);
831                 scsi_status = le16_to_cpu(sts->scsi_status) & SS_MASK;
832         }
833
834         /* Fast path completion. */
835         if (comp_status == CS_COMPLETE && scsi_status == 0) {
836                 qla2x00_process_completed_request(ha, sts->handle);
837
838                 return;
839         }
840
841         /* Validate handle. */
842         if (sts->handle < MAX_OUTSTANDING_COMMANDS) {
843                 sp = ha->outstanding_cmds[sts->handle];
844                 ha->outstanding_cmds[sts->handle] = NULL;
845         } else
846                 sp = NULL;
847
848         if (sp == NULL) {
849                 DEBUG2(printk("scsi(%ld): Status Entry invalid handle.\n",
850                     ha->host_no));
851                 qla_printk(KERN_WARNING, ha, "Status Entry invalid handle.\n");
852
853                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
854                 qla2xxx_wake_dpc(ha);
855                 return;
856         }
857         cp = sp->cmd;
858         if (cp == NULL) {
859                 DEBUG2(printk("scsi(%ld): Command already returned back to OS "
860                     "pkt->handle=%d sp=%p.\n", ha->host_no, sts->handle, sp));
861                 qla_printk(KERN_WARNING, ha,
862                     "Command is NULL: already returned to OS (sp=%p)\n", sp);
863
864                 return;
865         }
866
867         lscsi_status = scsi_status & STATUS_MASK;
868         CMD_ENTRY_STATUS(cp) = sts->entry_status;
869         CMD_COMPL_STATUS(cp) = comp_status;
870         CMD_SCSI_STATUS(cp) = scsi_status;
871
872         fcport = sp->fcport;
873
874         sense_len = rsp_info_len = resid_len = fw_resid_len = 0;
875         if (IS_QLA24XX(ha) || IS_QLA54XX(ha)) {
876                 sense_len = le32_to_cpu(sts24->sense_len);
877                 rsp_info_len = le32_to_cpu(sts24->rsp_data_len);
878                 resid_len = le32_to_cpu(sts24->rsp_residual_count);
879                 fw_resid_len = le32_to_cpu(sts24->residual_len);
880                 rsp_info = sts24->data;
881                 sense_data = sts24->data;
882                 host_to_fcp_swap(sts24->data, sizeof(sts24->data));
883         } else {
884                 sense_len = le16_to_cpu(sts->req_sense_length);
885                 rsp_info_len = le16_to_cpu(sts->rsp_info_len);
886                 resid_len = le32_to_cpu(sts->residual_length);
887                 rsp_info = sts->rsp_info;
888                 sense_data = sts->req_sense_data;
889         }
890
891         /* Check for any FCP transport errors. */
892         if (scsi_status & SS_RESPONSE_INFO_LEN_VALID) {
893                 /* Sense data lies beyond any FCP RESPONSE data. */
894                 if (IS_QLA24XX(ha) || IS_QLA54XX(ha))
895                         sense_data += rsp_info_len;
896                 if (rsp_info_len > 3 && rsp_info[3]) {
897                         DEBUG2(printk("scsi(%ld:%d:%d:%d) FCP I/O protocol "
898                             "failure (%x/%02x%02x%02x%02x%02x%02x%02x%02x)..."
899                             "retrying command\n", ha->host_no,
900                             cp->device->channel, cp->device->id,
901                             cp->device->lun, rsp_info_len, rsp_info[0],
902                             rsp_info[1], rsp_info[2], rsp_info[3], rsp_info[4],
903                             rsp_info[5], rsp_info[6], rsp_info[7]));
904
905                         cp->result = DID_BUS_BUSY << 16;
906                         qla2x00_sp_compl(ha, sp);
907                         return;
908                 }
909         }
910
911         /*
912          * Based on Host and scsi status generate status code for Linux
913          */
914         switch (comp_status) {
915         case CS_COMPLETE:
916         case CS_QUEUE_FULL:
917                 if (scsi_status == 0) {
918                         cp->result = DID_OK << 16;
919                         break;
920                 }
921                 if (scsi_status & (SS_RESIDUAL_UNDER | SS_RESIDUAL_OVER)) {
922                         resid = resid_len;
923                         scsi_set_resid(cp, resid);
924                         CMD_RESID_LEN(cp) = resid;
925
926                         if (!lscsi_status &&
927                             ((unsigned)(scsi_bufflen(cp) - resid) <
928                              cp->underflow)) {
929                                 qla_printk(KERN_INFO, ha,
930                                            "scsi(%ld:%d:%d:%d): Mid-layer underflow "
931                                            "detected (%x of %x bytes)...returning "
932                                            "error status.\n", ha->host_no,
933                                            cp->device->channel, cp->device->id,
934                                            cp->device->lun, resid,
935                                            scsi_bufflen(cp));
936
937                                 cp->result = DID_ERROR << 16;
938                                 break;
939                         }
940                 }
941                 cp->result = DID_OK << 16 | lscsi_status;
942
943                 if (lscsi_status == SAM_STAT_TASK_SET_FULL) {
944                         DEBUG2(printk(KERN_INFO
945                             "scsi(%ld): QUEUE FULL status detected "
946                             "0x%x-0x%x.\n", ha->host_no, comp_status,
947                             scsi_status));
948
949                         /* Adjust queue depth for all luns on the port. */
950                         fcport->last_queue_full = jiffies;
951                         starget_for_each_device(cp->device->sdev_target,
952                             fcport, qla2x00_adjust_sdev_qdepth_down);
953                         break;
954                 }
955                 if (lscsi_status != SS_CHECK_CONDITION)
956                         break;
957
958                 /* Copy Sense Data into sense buffer. */
959                 memset(cp->sense_buffer, 0, sizeof(cp->sense_buffer));
960
961                 if (!(scsi_status & SS_SENSE_LEN_VALID))
962                         break;
963
964                 if (sense_len >= sizeof(cp->sense_buffer))
965                         sense_len = sizeof(cp->sense_buffer);
966
967                 CMD_ACTUAL_SNSLEN(cp) = sense_len;
968                 sp->request_sense_length = sense_len;
969                 sp->request_sense_ptr = cp->sense_buffer;
970
971                 if (sp->request_sense_length > 32)
972                         sense_len = 32;
973
974                 memcpy(cp->sense_buffer, sense_data, sense_len);
975
976                 sp->request_sense_ptr += sense_len;
977                 sp->request_sense_length -= sense_len;
978                 if (sp->request_sense_length != 0)
979                         ha->status_srb = sp;
980
981                 DEBUG5(printk("%s(): Check condition Sense data, "
982                     "scsi(%ld:%d:%d:%d) cmd=%p pid=%ld\n", __func__,
983                     ha->host_no, cp->device->channel, cp->device->id,
984                     cp->device->lun, cp, cp->serial_number));
985                 if (sense_len)
986                         DEBUG5(qla2x00_dump_buffer(cp->sense_buffer,
987                             CMD_ACTUAL_SNSLEN(cp)));
988                 break;
989
990         case CS_DATA_UNDERRUN:
991                 resid = resid_len;
992                 /* Use F/W calculated residual length. */
993                 if (IS_QLA24XX(ha) || IS_QLA54XX(ha))
994                         resid = fw_resid_len;
995
996                 if (scsi_status & SS_RESIDUAL_UNDER) {
997                         scsi_set_resid(cp, resid);
998                         CMD_RESID_LEN(cp) = resid;
999                 } else {
1000                         DEBUG2(printk(KERN_INFO
1001                             "scsi(%ld:%d:%d) UNDERRUN status detected "
1002                             "0x%x-0x%x. resid=0x%x fw_resid=0x%x cdb=0x%x "
1003                             "os_underflow=0x%x\n", ha->host_no,
1004                             cp->device->id, cp->device->lun, comp_status,
1005                             scsi_status, resid_len, resid, cp->cmnd[0],
1006                             cp->underflow));
1007
1008                 }
1009
1010                 /*
1011                  * Check to see if SCSI Status is non zero. If so report SCSI
1012                  * Status.
1013                  */
1014                 if (lscsi_status != 0) {
1015                         cp->result = DID_OK << 16 | lscsi_status;
1016
1017                         if (lscsi_status == SAM_STAT_TASK_SET_FULL) {
1018                                 DEBUG2(printk(KERN_INFO
1019                                     "scsi(%ld): QUEUE FULL status detected "
1020                                     "0x%x-0x%x.\n", ha->host_no, comp_status,
1021                                     scsi_status));
1022
1023                                 /*
1024                                  * Adjust queue depth for all luns on the
1025                                  * port.
1026                                  */
1027                                 fcport->last_queue_full = jiffies;
1028                                 starget_for_each_device(
1029                                     cp->device->sdev_target, fcport,
1030                                     qla2x00_adjust_sdev_qdepth_down);
1031                                 break;
1032                         }
1033                         if (lscsi_status != SS_CHECK_CONDITION)
1034                                 break;
1035
1036                         /* Copy Sense Data into sense buffer */
1037                         memset(cp->sense_buffer, 0, sizeof(cp->sense_buffer));
1038
1039                         if (!(scsi_status & SS_SENSE_LEN_VALID))
1040                                 break;
1041
1042                         if (sense_len >= sizeof(cp->sense_buffer))
1043                                 sense_len = sizeof(cp->sense_buffer);
1044
1045                         CMD_ACTUAL_SNSLEN(cp) = sense_len;
1046                         sp->request_sense_length = sense_len;
1047                         sp->request_sense_ptr = cp->sense_buffer;
1048
1049                         if (sp->request_sense_length > 32)
1050                                 sense_len = 32;
1051
1052                         memcpy(cp->sense_buffer, sense_data, sense_len);
1053
1054                         sp->request_sense_ptr += sense_len;
1055                         sp->request_sense_length -= sense_len;
1056                         if (sp->request_sense_length != 0)
1057                                 ha->status_srb = sp;
1058
1059                         DEBUG5(printk("%s(): Check condition Sense data, "
1060                             "scsi(%ld:%d:%d:%d) cmd=%p pid=%ld\n",
1061                             __func__, ha->host_no, cp->device->channel,
1062                             cp->device->id, cp->device->lun, cp,
1063                             cp->serial_number));
1064
1065                         if (sense_len)
1066                                 DEBUG5(qla2x00_dump_buffer(cp->sense_buffer,
1067                                     CMD_ACTUAL_SNSLEN(cp)));
1068                 } else {
1069                         /*
1070                          * If RISC reports underrun and target does not report
1071                          * it then we must have a lost frame, so tell upper
1072                          * layer to retry it by reporting a bus busy.
1073                          */
1074                         if (!(scsi_status & SS_RESIDUAL_UNDER)) {
1075                                 DEBUG2(printk("scsi(%ld:%d:%d:%d) Dropped "
1076                                               "frame(s) detected (%x of %x bytes)..."
1077                                               "retrying command.\n", ha->host_no,
1078                                               cp->device->channel, cp->device->id,
1079                                               cp->device->lun, resid,
1080                                               scsi_bufflen(cp)));
1081
1082                                 cp->result = DID_BUS_BUSY << 16;
1083                                 break;
1084                         }
1085
1086                         /* Handle mid-layer underflow */
1087                         if ((unsigned)(scsi_bufflen(cp) - resid) <
1088                             cp->underflow) {
1089                                 qla_printk(KERN_INFO, ha,
1090                                            "scsi(%ld:%d:%d:%d): Mid-layer underflow "
1091                                            "detected (%x of %x bytes)...returning "
1092                                            "error status.\n", ha->host_no,
1093                                            cp->device->channel, cp->device->id,
1094                                            cp->device->lun, resid,
1095                                            scsi_bufflen(cp));
1096
1097                                 cp->result = DID_ERROR << 16;
1098                                 break;
1099                         }
1100
1101                         /* Everybody online, looking good... */
1102                         cp->result = DID_OK << 16;
1103                 }
1104                 break;
1105
1106         case CS_DATA_OVERRUN:
1107                 DEBUG2(printk(KERN_INFO
1108                     "scsi(%ld:%d:%d): OVERRUN status detected 0x%x-0x%x\n",
1109                     ha->host_no, cp->device->id, cp->device->lun, comp_status,
1110                     scsi_status));
1111                 DEBUG2(printk(KERN_INFO
1112                     "CDB: 0x%x 0x%x 0x%x 0x%x 0x%x 0x%x\n",
1113                     cp->cmnd[0], cp->cmnd[1], cp->cmnd[2], cp->cmnd[3],
1114                     cp->cmnd[4], cp->cmnd[5]));
1115                 DEBUG2(printk(KERN_INFO
1116                     "PID=0x%lx req=0x%x xtra=0x%x -- returning DID_ERROR "
1117                     "status!\n",
1118                     cp->serial_number, scsi_bufflen(cp), resid_len));
1119
1120                 cp->result = DID_ERROR << 16;
1121                 break;
1122
1123         case CS_PORT_LOGGED_OUT:
1124         case CS_PORT_CONFIG_CHG:
1125         case CS_PORT_BUSY:
1126         case CS_INCOMPLETE:
1127         case CS_PORT_UNAVAILABLE:
1128                 /*
1129                  * If the port is in Target Down state, return all IOs for this
1130                  * Target with DID_NO_CONNECT ELSE Queue the IOs in the
1131                  * retry_queue.
1132                  */
1133                 DEBUG2(printk("scsi(%ld:%d:%d): status_entry: Port Down "
1134                     "pid=%ld, compl status=0x%x, port state=0x%x\n",
1135                     ha->host_no, cp->device->id, cp->device->lun,
1136                     cp->serial_number, comp_status,
1137                     atomic_read(&fcport->state)));
1138
1139                 cp->result = DID_BUS_BUSY << 16;
1140                 if (atomic_read(&fcport->state) == FCS_ONLINE) {
1141                         qla2x00_mark_device_lost(ha, fcport, 1, 1);
1142                 }
1143                 break;
1144
1145         case CS_RESET:
1146                 DEBUG2(printk(KERN_INFO
1147                     "scsi(%ld): RESET status detected 0x%x-0x%x.\n",
1148                     ha->host_no, comp_status, scsi_status));
1149
1150                 cp->result = DID_RESET << 16;
1151                 break;
1152
1153         case CS_ABORTED:
1154                 /*
1155                  * hv2.19.12 - DID_ABORT does not retry the request if we
1156                  * aborted this request then abort otherwise it must be a
1157                  * reset.
1158                  */
1159                 DEBUG2(printk(KERN_INFO
1160                     "scsi(%ld): ABORT status detected 0x%x-0x%x.\n",
1161                     ha->host_no, comp_status, scsi_status));
1162
1163                 cp->result = DID_RESET << 16;
1164                 break;
1165
1166         case CS_TIMEOUT:
1167                 cp->result = DID_BUS_BUSY << 16;
1168
1169                 if (IS_QLA24XX(ha) || IS_QLA54XX(ha)) {
1170                         DEBUG2(printk(KERN_INFO
1171                             "scsi(%ld:%d:%d:%d): TIMEOUT status detected "
1172                             "0x%x-0x%x\n", ha->host_no, cp->device->channel,
1173                             cp->device->id, cp->device->lun, comp_status,
1174                             scsi_status));
1175                         break;
1176                 }
1177                 DEBUG2(printk(KERN_INFO
1178                     "scsi(%ld:%d:%d:%d): TIMEOUT status detected 0x%x-0x%x "
1179                     "sflags=%x.\n", ha->host_no, cp->device->channel,
1180                     cp->device->id, cp->device->lun, comp_status, scsi_status,
1181                     le16_to_cpu(sts->status_flags)));
1182
1183                 /* Check to see if logout occurred. */
1184                 if ((le16_to_cpu(sts->status_flags) & SF_LOGOUT_SENT))
1185                         qla2x00_mark_device_lost(ha, fcport, 1, 1);
1186                 break;
1187
1188         default:
1189                 DEBUG3(printk("scsi(%ld): Error detected (unknown status) "
1190                     "0x%x-0x%x.\n", ha->host_no, comp_status, scsi_status));
1191                 qla_printk(KERN_INFO, ha,
1192                     "Unknown status detected 0x%x-0x%x.\n",
1193                     comp_status, scsi_status);
1194
1195                 cp->result = DID_ERROR << 16;
1196                 break;
1197         }
1198
1199         /* Place command on done queue. */
1200         if (ha->status_srb == NULL)
1201                 qla2x00_sp_compl(ha, sp);
1202 }
1203
1204 /**
1205  * qla2x00_status_cont_entry() - Process a Status Continuations entry.
1206  * @ha: SCSI driver HA context
1207  * @pkt: Entry pointer
1208  *
1209  * Extended sense data.
1210  */
1211 static void
1212 qla2x00_status_cont_entry(scsi_qla_host_t *ha, sts_cont_entry_t *pkt)
1213 {
1214         uint8_t         sense_sz = 0;
1215         srb_t           *sp = ha->status_srb;
1216         struct scsi_cmnd *cp;
1217
1218         if (sp != NULL && sp->request_sense_length != 0) {
1219                 cp = sp->cmd;
1220                 if (cp == NULL) {
1221                         DEBUG2(printk("%s(): Cmd already returned back to OS "
1222                             "sp=%p.\n", __func__, sp));
1223                         qla_printk(KERN_INFO, ha,
1224                             "cmd is NULL: already returned to OS (sp=%p)\n",
1225                             sp);
1226
1227                         ha->status_srb = NULL;
1228                         return;
1229                 }
1230
1231                 if (sp->request_sense_length > sizeof(pkt->data)) {
1232                         sense_sz = sizeof(pkt->data);
1233                 } else {
1234                         sense_sz = sp->request_sense_length;
1235                 }
1236
1237                 /* Move sense data. */
1238                 if (IS_QLA24XX(ha) || IS_QLA54XX(ha))
1239                         host_to_fcp_swap(pkt->data, sizeof(pkt->data));
1240                 memcpy(sp->request_sense_ptr, pkt->data, sense_sz);
1241                 DEBUG5(qla2x00_dump_buffer(sp->request_sense_ptr, sense_sz));
1242
1243                 sp->request_sense_ptr += sense_sz;
1244                 sp->request_sense_length -= sense_sz;
1245
1246                 /* Place command on done queue. */
1247                 if (sp->request_sense_length == 0) {
1248                         ha->status_srb = NULL;
1249                         qla2x00_sp_compl(ha, sp);
1250                 }
1251         }
1252 }
1253
1254 /**
1255  * qla2x00_error_entry() - Process an error entry.
1256  * @ha: SCSI driver HA context
1257  * @pkt: Entry pointer
1258  */
1259 static void
1260 qla2x00_error_entry(scsi_qla_host_t *ha, sts_entry_t *pkt)
1261 {
1262         srb_t *sp;
1263
1264 #if defined(QL_DEBUG_LEVEL_2)
1265         if (pkt->entry_status & RF_INV_E_ORDER)
1266                 qla_printk(KERN_ERR, ha, "%s: Invalid Entry Order\n", __func__);
1267         else if (pkt->entry_status & RF_INV_E_COUNT)
1268                 qla_printk(KERN_ERR, ha, "%s: Invalid Entry Count\n", __func__);
1269         else if (pkt->entry_status & RF_INV_E_PARAM)
1270                 qla_printk(KERN_ERR, ha,
1271                     "%s: Invalid Entry Parameter\n", __func__);
1272         else if (pkt->entry_status & RF_INV_E_TYPE)
1273                 qla_printk(KERN_ERR, ha, "%s: Invalid Entry Type\n", __func__);
1274         else if (pkt->entry_status & RF_BUSY)
1275                 qla_printk(KERN_ERR, ha, "%s: Busy\n", __func__);
1276         else
1277                 qla_printk(KERN_ERR, ha, "%s: UNKNOWN flag error\n", __func__);
1278 #endif
1279
1280         /* Validate handle. */
1281         if (pkt->handle < MAX_OUTSTANDING_COMMANDS)
1282                 sp = ha->outstanding_cmds[pkt->handle];
1283         else
1284                 sp = NULL;
1285
1286         if (sp) {
1287                 /* Free outstanding command slot. */
1288                 ha->outstanding_cmds[pkt->handle] = NULL;
1289
1290                 /* Bad payload or header */
1291                 if (pkt->entry_status &
1292                     (RF_INV_E_ORDER | RF_INV_E_COUNT |
1293                      RF_INV_E_PARAM | RF_INV_E_TYPE)) {
1294                         sp->cmd->result = DID_ERROR << 16;
1295                 } else if (pkt->entry_status & RF_BUSY) {
1296                         sp->cmd->result = DID_BUS_BUSY << 16;
1297                 } else {
1298                         sp->cmd->result = DID_ERROR << 16;
1299                 }
1300                 qla2x00_sp_compl(ha, sp);
1301
1302         } else if (pkt->entry_type == COMMAND_A64_TYPE || pkt->entry_type ==
1303             COMMAND_TYPE || pkt->entry_type == COMMAND_TYPE_7) {
1304                 DEBUG2(printk("scsi(%ld): Error entry - invalid handle\n",
1305                     ha->host_no));
1306                 qla_printk(KERN_WARNING, ha,
1307                     "Error entry - invalid handle\n");
1308
1309                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
1310                 qla2xxx_wake_dpc(ha);
1311         }
1312 }
1313
1314 /**
1315  * qla2x00_ms_entry() - Process a Management Server entry.
1316  * @ha: SCSI driver HA context
1317  * @index: Response queue out pointer
1318  */
1319 static void
1320 qla2x00_ms_entry(scsi_qla_host_t *ha, ms_iocb_entry_t *pkt)
1321 {
1322         srb_t          *sp;
1323
1324         DEBUG3(printk("%s(%ld): pkt=%p pkthandle=%d.\n",
1325             __func__, ha->host_no, pkt, pkt->handle1));
1326
1327         /* Validate handle. */
1328         if (pkt->handle1 < MAX_OUTSTANDING_COMMANDS)
1329                 sp = ha->outstanding_cmds[pkt->handle1];
1330         else
1331                 sp = NULL;
1332
1333         if (sp == NULL) {
1334                 DEBUG2(printk("scsi(%ld): MS entry - invalid handle\n",
1335                     ha->host_no));
1336                 qla_printk(KERN_WARNING, ha, "MS entry - invalid handle\n");
1337
1338                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
1339                 return;
1340         }
1341
1342         CMD_COMPL_STATUS(sp->cmd) = le16_to_cpu(pkt->status);
1343         CMD_ENTRY_STATUS(sp->cmd) = pkt->entry_status;
1344
1345         /* Free outstanding command slot. */
1346         ha->outstanding_cmds[pkt->handle1] = NULL;
1347
1348         qla2x00_sp_compl(ha, sp);
1349 }
1350
1351
1352 /**
1353  * qla24xx_mbx_completion() - Process mailbox command completions.
1354  * @ha: SCSI driver HA context
1355  * @mb0: Mailbox0 register
1356  */
1357 static void
1358 qla24xx_mbx_completion(scsi_qla_host_t *ha, uint16_t mb0)
1359 {
1360         uint16_t        cnt;
1361         uint16_t __iomem *wptr;
1362         struct device_reg_24xx __iomem *reg = &ha->iobase->isp24;
1363
1364         /* Load return mailbox registers. */
1365         ha->flags.mbox_int = 1;
1366         ha->mailbox_out[0] = mb0;
1367         wptr = (uint16_t __iomem *)&reg->mailbox1;
1368
1369         for (cnt = 1; cnt < ha->mbx_count; cnt++) {
1370                 ha->mailbox_out[cnt] = RD_REG_WORD(wptr);
1371                 wptr++;
1372         }
1373
1374         if (ha->mcp) {
1375                 DEBUG3(printk("%s(%ld): Got mailbox completion. cmd=%x.\n",
1376                     __func__, ha->host_no, ha->mcp->mb[0]));
1377         } else {
1378                 DEBUG2_3(printk("%s(%ld): MBX pointer ERROR!\n",
1379                     __func__, ha->host_no));
1380         }
1381 }
1382
1383 /**
1384  * qla24xx_process_response_queue() - Process response queue entries.
1385  * @ha: SCSI driver HA context
1386  */
1387 void
1388 qla24xx_process_response_queue(struct scsi_qla_host *ha)
1389 {
1390         struct device_reg_24xx __iomem *reg = &ha->iobase->isp24;
1391         struct sts_entry_24xx *pkt;
1392
1393         if (!ha->flags.online)
1394                 return;
1395
1396         while (ha->response_ring_ptr->signature != RESPONSE_PROCESSED) {
1397                 pkt = (struct sts_entry_24xx *)ha->response_ring_ptr;
1398
1399                 ha->rsp_ring_index++;
1400                 if (ha->rsp_ring_index == ha->response_q_length) {
1401                         ha->rsp_ring_index = 0;
1402                         ha->response_ring_ptr = ha->response_ring;
1403                 } else {
1404                         ha->response_ring_ptr++;
1405                 }
1406
1407                 if (pkt->entry_status != 0) {
1408                         DEBUG3(printk(KERN_INFO
1409                             "scsi(%ld): Process error entry.\n", ha->host_no));
1410
1411                         qla2x00_error_entry(ha, (sts_entry_t *) pkt);
1412                         ((response_t *)pkt)->signature = RESPONSE_PROCESSED;
1413                         wmb();
1414                         continue;
1415                 }
1416
1417                 switch (pkt->entry_type) {
1418                 case STATUS_TYPE:
1419                         qla2x00_status_entry(ha, pkt);
1420                         break;
1421                 case STATUS_CONT_TYPE:
1422                         qla2x00_status_cont_entry(ha, (sts_cont_entry_t *)pkt);
1423                         break;
1424                 case MS_IOCB_TYPE:
1425                         qla24xx_ms_entry(ha, (struct ct_entry_24xx *)pkt);
1426                         break;
1427                 case VP_RPT_ID_IOCB_TYPE:
1428                         qla24xx_report_id_acquisition(ha,
1429                             (struct vp_rpt_id_entry_24xx *)pkt);
1430                         break;
1431                 default:
1432                         /* Type Not Supported. */
1433                         DEBUG4(printk(KERN_WARNING
1434                             "scsi(%ld): Received unknown response pkt type %x "
1435                             "entry status=%x.\n",
1436                             ha->host_no, pkt->entry_type, pkt->entry_status));
1437                         break;
1438                 }
1439                 ((response_t *)pkt)->signature = RESPONSE_PROCESSED;
1440                 wmb();
1441         }
1442
1443         /* Adjust ring index */
1444         WRT_REG_DWORD(&reg->rsp_q_out, ha->rsp_ring_index);
1445 }
1446
1447 /**
1448  * qla24xx_intr_handler() - Process interrupts for the ISP23xx and ISP63xx.
1449  * @irq:
1450  * @dev_id: SCSI driver HA context
1451  *
1452  * Called by system whenever the host adapter generates an interrupt.
1453  *
1454  * Returns handled flag.
1455  */
1456 irqreturn_t
1457 qla24xx_intr_handler(int irq, void *dev_id)
1458 {
1459         scsi_qla_host_t *ha;
1460         struct device_reg_24xx __iomem *reg;
1461         int             status;
1462         unsigned long   flags;
1463         unsigned long   iter;
1464         uint32_t        stat;
1465         uint32_t        hccr;
1466         uint16_t        mb[4];
1467
1468         ha = (scsi_qla_host_t *) dev_id;
1469         if (!ha) {
1470                 printk(KERN_INFO
1471                     "%s(): NULL host pointer\n", __func__);
1472                 return IRQ_NONE;
1473         }
1474
1475         reg = &ha->iobase->isp24;
1476         status = 0;
1477
1478         spin_lock_irqsave(&ha->hardware_lock, flags);
1479         for (iter = 50; iter--; ) {
1480                 stat = RD_REG_DWORD(&reg->host_status);
1481                 if (stat & HSRX_RISC_PAUSED) {
1482                         hccr = RD_REG_DWORD(&reg->hccr);
1483
1484                         qla_printk(KERN_INFO, ha, "RISC paused -- HCCR=%x, "
1485                             "Dumping firmware!\n", hccr);
1486                         ha->isp_ops.fw_dump(ha, 1);
1487                         set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
1488                         break;
1489                 } else if ((stat & HSRX_RISC_INT) == 0)
1490                         break;
1491
1492                 switch (stat & 0xff) {
1493                 case 0x1:
1494                 case 0x2:
1495                 case 0x10:
1496                 case 0x11:
1497                         qla24xx_mbx_completion(ha, MSW(stat));
1498                         status |= MBX_INTERRUPT;
1499
1500                         break;
1501                 case 0x12:
1502                         mb[0] = MSW(stat);
1503                         mb[1] = RD_REG_WORD(&reg->mailbox1);
1504                         mb[2] = RD_REG_WORD(&reg->mailbox2);
1505                         mb[3] = RD_REG_WORD(&reg->mailbox3);
1506                         qla2x00_async_event(ha, mb);
1507                         break;
1508                 case 0x13:
1509                         qla24xx_process_response_queue(ha);
1510                         break;
1511                 default:
1512                         DEBUG2(printk("scsi(%ld): Unrecognized interrupt type "
1513                             "(%d).\n",
1514                             ha->host_no, stat & 0xff));
1515                         break;
1516                 }
1517                 WRT_REG_DWORD(&reg->hccr, HCCRX_CLR_RISC_INT);
1518                 RD_REG_DWORD_RELAXED(&reg->hccr);
1519         }
1520         spin_unlock_irqrestore(&ha->hardware_lock, flags);
1521
1522         if (test_bit(MBX_INTR_WAIT, &ha->mbx_cmd_flags) &&
1523             (status & MBX_INTERRUPT) && ha->flags.mbox_int) {
1524                 set_bit(MBX_INTERRUPT, &ha->mbx_cmd_flags);
1525                 up(&ha->mbx_intr_sem);
1526         }
1527
1528         return IRQ_HANDLED;
1529 }
1530
1531 /**
1532  * qla24xx_ms_entry() - Process a Management Server entry.
1533  * @ha: SCSI driver HA context
1534  * @index: Response queue out pointer
1535  */
1536 static void
1537 qla24xx_ms_entry(scsi_qla_host_t *ha, struct ct_entry_24xx *pkt)
1538 {
1539         srb_t          *sp;
1540
1541         DEBUG3(printk("%s(%ld): pkt=%p pkthandle=%d.\n",
1542             __func__, ha->host_no, pkt, pkt->handle));
1543
1544         DEBUG9(printk("%s: ct pkt dump:\n", __func__));
1545         DEBUG9(qla2x00_dump_buffer((void *)pkt, sizeof(struct ct_entry_24xx)));
1546
1547         /* Validate handle. */
1548         if (pkt->handle < MAX_OUTSTANDING_COMMANDS)
1549                 sp = ha->outstanding_cmds[pkt->handle];
1550         else
1551                 sp = NULL;
1552
1553         if (sp == NULL) {
1554                 DEBUG2(printk("scsi(%ld): MS entry - invalid handle\n",
1555                     ha->host_no));
1556                 DEBUG10(printk("scsi(%ld): MS entry - invalid handle\n",
1557                     ha->host_no));
1558                 qla_printk(KERN_WARNING, ha, "MS entry - invalid handle %d\n",
1559                     pkt->handle);
1560
1561                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
1562                 return;
1563         }
1564
1565         CMD_COMPL_STATUS(sp->cmd) = le16_to_cpu(pkt->comp_status);
1566         CMD_ENTRY_STATUS(sp->cmd) = pkt->entry_status;
1567
1568         /* Free outstanding command slot. */
1569         ha->outstanding_cmds[pkt->handle] = NULL;
1570
1571         qla2x00_sp_compl(ha, sp);
1572 }
1573
1574 static irqreturn_t
1575 qla24xx_msix_rsp_q(int irq, void *dev_id)
1576 {
1577         scsi_qla_host_t *ha;
1578         struct device_reg_24xx __iomem *reg;
1579         unsigned long flags;
1580
1581         ha = dev_id;
1582         reg = &ha->iobase->isp24;
1583
1584         spin_lock_irqsave(&ha->hardware_lock, flags);
1585
1586         qla24xx_process_response_queue(ha);
1587
1588         WRT_REG_DWORD(&reg->hccr, HCCRX_CLR_RISC_INT);
1589         RD_REG_DWORD_RELAXED(&reg->hccr);
1590
1591         spin_unlock_irqrestore(&ha->hardware_lock, flags);
1592
1593         return IRQ_HANDLED;
1594 }
1595
1596 static irqreturn_t
1597 qla24xx_msix_default(int irq, void *dev_id)
1598 {
1599         scsi_qla_host_t *ha;
1600         struct device_reg_24xx __iomem *reg;
1601         int             status;
1602         unsigned long   flags;
1603         unsigned long   iter;
1604         uint32_t        stat;
1605         uint32_t        hccr;
1606         uint16_t        mb[4];
1607
1608         ha = dev_id;
1609         reg = &ha->iobase->isp24;
1610         status = 0;
1611
1612         spin_lock_irqsave(&ha->hardware_lock, flags);
1613         for (iter = 50; iter--; ) {
1614                 stat = RD_REG_DWORD(&reg->host_status);
1615                 if (stat & HSRX_RISC_PAUSED) {
1616                         hccr = RD_REG_DWORD(&reg->hccr);
1617
1618                         qla_printk(KERN_INFO, ha, "RISC paused -- HCCR=%x, "
1619                             "Dumping firmware!\n", hccr);
1620                         ha->isp_ops.fw_dump(ha, 1);
1621                         set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
1622                         break;
1623                 } else if ((stat & HSRX_RISC_INT) == 0)
1624                         break;
1625
1626                 switch (stat & 0xff) {
1627                 case 0x1:
1628                 case 0x2:
1629                 case 0x10:
1630                 case 0x11:
1631                         qla24xx_mbx_completion(ha, MSW(stat));
1632                         status |= MBX_INTERRUPT;
1633
1634                         break;
1635                 case 0x12:
1636                         mb[0] = MSW(stat);
1637                         mb[1] = RD_REG_WORD(&reg->mailbox1);
1638                         mb[2] = RD_REG_WORD(&reg->mailbox2);
1639                         mb[3] = RD_REG_WORD(&reg->mailbox3);
1640                         qla2x00_async_event(ha, mb);
1641                         break;
1642                 case 0x13:
1643                         qla24xx_process_response_queue(ha);
1644                         break;
1645                 default:
1646                         DEBUG2(printk("scsi(%ld): Unrecognized interrupt type "
1647                             "(%d).\n",
1648                             ha->host_no, stat & 0xff));
1649                         break;
1650                 }
1651                 WRT_REG_DWORD(&reg->hccr, HCCRX_CLR_RISC_INT);
1652                 RD_REG_DWORD_RELAXED(&reg->hccr);
1653         }
1654         spin_unlock_irqrestore(&ha->hardware_lock, flags);
1655
1656         if (test_bit(MBX_INTR_WAIT, &ha->mbx_cmd_flags) &&
1657             (status & MBX_INTERRUPT) && ha->flags.mbox_int) {
1658                 set_bit(MBX_INTERRUPT, &ha->mbx_cmd_flags);
1659                 up(&ha->mbx_intr_sem);
1660         }
1661
1662         return IRQ_HANDLED;
1663 }
1664
1665 /* Interrupt handling helpers. */
1666
1667 struct qla_init_msix_entry {
1668         uint16_t entry;
1669         uint16_t index;
1670         const char *name;
1671         irq_handler_t handler;
1672 };
1673
1674 static struct qla_init_msix_entry imsix_entries[QLA_MSIX_ENTRIES] = {
1675         { QLA_MSIX_DEFAULT, QLA_MIDX_DEFAULT,
1676                 "qla2xxx (default)", qla24xx_msix_default },
1677
1678         { QLA_MSIX_RSP_Q, QLA_MIDX_RSP_Q,
1679                 "qla2xxx (rsp_q)", qla24xx_msix_rsp_q },
1680 };
1681
1682 static void
1683 qla24xx_disable_msix(scsi_qla_host_t *ha)
1684 {
1685         int i;
1686         struct qla_msix_entry *qentry;
1687
1688         for (i = 0; i < QLA_MSIX_ENTRIES; i++) {
1689                 qentry = &ha->msix_entries[imsix_entries[i].index];
1690                 if (qentry->have_irq)
1691                         free_irq(qentry->msix_vector, ha);
1692         }
1693         pci_disable_msix(ha->pdev);
1694 }
1695
1696 static int
1697 qla24xx_enable_msix(scsi_qla_host_t *ha)
1698 {
1699         int i, ret;
1700         struct msix_entry entries[QLA_MSIX_ENTRIES];
1701         struct qla_msix_entry *qentry;
1702
1703         for (i = 0; i < QLA_MSIX_ENTRIES; i++)
1704                 entries[i].entry = imsix_entries[i].entry;
1705
1706         ret = pci_enable_msix(ha->pdev, entries, ARRAY_SIZE(entries));
1707         if (ret) {
1708                 qla_printk(KERN_WARNING, ha,
1709                     "MSI-X: Failed to enable support -- %d/%d\n",
1710                     QLA_MSIX_ENTRIES, ret);
1711                 goto msix_out;
1712         }
1713         ha->flags.msix_enabled = 1;
1714
1715         for (i = 0; i < QLA_MSIX_ENTRIES; i++) {
1716                 qentry = &ha->msix_entries[imsix_entries[i].index];
1717                 qentry->msix_vector = entries[i].vector;
1718                 qentry->msix_entry = entries[i].entry;
1719                 qentry->have_irq = 0;
1720                 ret = request_irq(qentry->msix_vector,
1721                     imsix_entries[i].handler, 0, imsix_entries[i].name, ha);
1722                 if (ret) {
1723                         qla_printk(KERN_WARNING, ha,
1724                             "MSI-X: Unable to register handler -- %x/%d.\n",
1725                             imsix_entries[i].index, ret);
1726                         qla24xx_disable_msix(ha);
1727                         goto msix_out;
1728                 }
1729                 qentry->have_irq = 1;
1730         }
1731
1732 msix_out:
1733         return ret;
1734 }
1735
1736 int
1737 qla2x00_request_irqs(scsi_qla_host_t *ha)
1738 {
1739         int ret;
1740
1741         /* If possible, enable MSI-X. */
1742         if (!IS_QLA2432(ha))
1743                 goto skip_msix;
1744
1745         if (ha->chip_revision < QLA_MSIX_CHIP_REV_24XX ||
1746             !QLA_MSIX_FW_MODE_1(ha->fw_attributes)) {
1747                 DEBUG2(qla_printk(KERN_WARNING, ha,
1748                     "MSI-X: Unsupported ISP2432 (0x%X, 0x%X).\n",
1749                     ha->chip_revision, ha->fw_attributes));
1750
1751                 goto skip_msix;
1752         }
1753
1754         ret = qla24xx_enable_msix(ha);
1755         if (!ret) {
1756                 DEBUG2(qla_printk(KERN_INFO, ha,
1757                     "MSI-X: Enabled (0x%X, 0x%X).\n", ha->chip_revision,
1758                     ha->fw_attributes));
1759                 return ret;
1760         }
1761         qla_printk(KERN_WARNING, ha,
1762             "MSI-X: Falling back-to INTa mode -- %d.\n", ret);
1763 skip_msix:
1764
1765         if (!IS_QLA24XX(ha))
1766                 goto skip_msi;
1767
1768         ret = pci_enable_msi(ha->pdev);
1769         if (!ret) {
1770                 DEBUG2(qla_printk(KERN_INFO, ha, "MSI: Enabled.\n"));
1771                 ha->flags.msi_enabled = 1;
1772         }
1773 skip_msi:
1774
1775         ret = request_irq(ha->pdev->irq, ha->isp_ops.intr_handler,
1776             IRQF_DISABLED|IRQF_SHARED, QLA2XXX_DRIVER_NAME, ha);
1777         if (!ret) {
1778                 ha->flags.inta_enabled = 1;
1779                 ha->host->irq = ha->pdev->irq;
1780         } else {
1781                 qla_printk(KERN_WARNING, ha,
1782                     "Failed to reserve interrupt %d already in use.\n",
1783                     ha->pdev->irq);
1784         }
1785
1786         return ret;
1787 }
1788
1789 void
1790 qla2x00_free_irqs(scsi_qla_host_t *ha)
1791 {
1792
1793         if (ha->flags.msix_enabled)
1794                 qla24xx_disable_msix(ha);
1795         else if (ha->flags.inta_enabled) {
1796                 free_irq(ha->host->irq, ha);
1797                 pci_disable_msi(ha->pdev);
1798         }
1799 }