Merge branch 'ec' into test
[linux-2.6] / drivers / scsi / qla2xxx / qla_isr.c
1 /*
2  * QLogic Fibre Channel HBA Driver
3  * Copyright (c)  2003-2008 QLogic Corporation
4  *
5  * See LICENSE.qla2xxx for copyright and licensing details.
6  */
7 #include "qla_def.h"
8
9 #include <linux/delay.h>
10 #include <scsi/scsi_tcq.h>
11
12 static void qla2x00_mbx_completion(scsi_qla_host_t *, uint16_t);
13 static void qla2x00_process_completed_request(struct scsi_qla_host *, uint32_t);
14 static void qla2x00_status_entry(scsi_qla_host_t *, void *);
15 static void qla2x00_status_cont_entry(scsi_qla_host_t *, sts_cont_entry_t *);
16 static void qla2x00_error_entry(scsi_qla_host_t *, sts_entry_t *);
17
18 /**
19  * qla2100_intr_handler() - Process interrupts for the ISP2100 and ISP2200.
20  * @irq:
21  * @dev_id: SCSI driver HA context
22  *
23  * Called by system whenever the host adapter generates an interrupt.
24  *
25  * Returns handled flag.
26  */
27 irqreturn_t
28 qla2100_intr_handler(int irq, void *dev_id)
29 {
30         scsi_qla_host_t *ha;
31         struct device_reg_2xxx __iomem *reg;
32         int             status;
33         unsigned long   iter;
34         uint16_t        hccr;
35         uint16_t        mb[4];
36
37         ha = (scsi_qla_host_t *) dev_id;
38         if (!ha) {
39                 printk(KERN_INFO
40                     "%s(): NULL host pointer\n", __func__);
41                 return (IRQ_NONE);
42         }
43
44         reg = &ha->iobase->isp;
45         status = 0;
46
47         spin_lock(&ha->hardware_lock);
48         for (iter = 50; iter--; ) {
49                 hccr = RD_REG_WORD(&reg->hccr);
50                 if (hccr & HCCR_RISC_PAUSE) {
51                         if (pci_channel_offline(ha->pdev))
52                                 break;
53
54                         /*
55                          * Issue a "HARD" reset in order for the RISC interrupt
56                          * bit to be cleared.  Schedule a big hammmer to get
57                          * out of the RISC PAUSED state.
58                          */
59                         WRT_REG_WORD(&reg->hccr, HCCR_RESET_RISC);
60                         RD_REG_WORD(&reg->hccr);
61
62                         ha->isp_ops->fw_dump(ha, 1);
63                         set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
64                         break;
65                 } else if ((RD_REG_WORD(&reg->istatus) & ISR_RISC_INT) == 0)
66                         break;
67
68                 if (RD_REG_WORD(&reg->semaphore) & BIT_0) {
69                         WRT_REG_WORD(&reg->hccr, HCCR_CLR_RISC_INT);
70                         RD_REG_WORD(&reg->hccr);
71
72                         /* Get mailbox data. */
73                         mb[0] = RD_MAILBOX_REG(ha, reg, 0);
74                         if (mb[0] > 0x3fff && mb[0] < 0x8000) {
75                                 qla2x00_mbx_completion(ha, mb[0]);
76                                 status |= MBX_INTERRUPT;
77                         } else if (mb[0] > 0x7fff && mb[0] < 0xc000) {
78                                 mb[1] = RD_MAILBOX_REG(ha, reg, 1);
79                                 mb[2] = RD_MAILBOX_REG(ha, reg, 2);
80                                 mb[3] = RD_MAILBOX_REG(ha, reg, 3);
81                                 qla2x00_async_event(ha, mb);
82                         } else {
83                                 /*EMPTY*/
84                                 DEBUG2(printk("scsi(%ld): Unrecognized "
85                                     "interrupt type (%d).\n",
86                                     ha->host_no, mb[0]));
87                         }
88                         /* Release mailbox registers. */
89                         WRT_REG_WORD(&reg->semaphore, 0);
90                         RD_REG_WORD(&reg->semaphore);
91                 } else {
92                         qla2x00_process_response_queue(ha);
93
94                         WRT_REG_WORD(&reg->hccr, HCCR_CLR_RISC_INT);
95                         RD_REG_WORD(&reg->hccr);
96                 }
97         }
98         spin_unlock(&ha->hardware_lock);
99
100         if (test_bit(MBX_INTR_WAIT, &ha->mbx_cmd_flags) &&
101             (status & MBX_INTERRUPT) && ha->flags.mbox_int) {
102                 set_bit(MBX_INTERRUPT, &ha->mbx_cmd_flags);
103                 complete(&ha->mbx_intr_comp);
104         }
105
106         return (IRQ_HANDLED);
107 }
108
109 /**
110  * qla2300_intr_handler() - Process interrupts for the ISP23xx and ISP63xx.
111  * @irq:
112  * @dev_id: SCSI driver HA context
113  *
114  * Called by system whenever the host adapter generates an interrupt.
115  *
116  * Returns handled flag.
117  */
118 irqreturn_t
119 qla2300_intr_handler(int irq, void *dev_id)
120 {
121         scsi_qla_host_t *ha;
122         struct device_reg_2xxx __iomem *reg;
123         int             status;
124         unsigned long   iter;
125         uint32_t        stat;
126         uint16_t        hccr;
127         uint16_t        mb[4];
128
129         ha = (scsi_qla_host_t *) dev_id;
130         if (!ha) {
131                 printk(KERN_INFO
132                     "%s(): NULL host pointer\n", __func__);
133                 return (IRQ_NONE);
134         }
135
136         reg = &ha->iobase->isp;
137         status = 0;
138
139         spin_lock(&ha->hardware_lock);
140         for (iter = 50; iter--; ) {
141                 stat = RD_REG_DWORD(&reg->u.isp2300.host_status);
142                 if (stat & HSR_RISC_PAUSED) {
143                         if (pci_channel_offline(ha->pdev))
144                                 break;
145
146                         hccr = RD_REG_WORD(&reg->hccr);
147                         if (hccr & (BIT_15 | BIT_13 | BIT_11 | BIT_8))
148                                 qla_printk(KERN_INFO, ha, "Parity error -- "
149                                     "HCCR=%x, Dumping firmware!\n", hccr);
150                         else
151                                 qla_printk(KERN_INFO, ha, "RISC paused -- "
152                                     "HCCR=%x, Dumping firmware!\n", hccr);
153
154                         /*
155                          * Issue a "HARD" reset in order for the RISC
156                          * interrupt bit to be cleared.  Schedule a big
157                          * hammmer to get out of the RISC PAUSED state.
158                          */
159                         WRT_REG_WORD(&reg->hccr, HCCR_RESET_RISC);
160                         RD_REG_WORD(&reg->hccr);
161
162                         ha->isp_ops->fw_dump(ha, 1);
163                         set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
164                         break;
165                 } else if ((stat & HSR_RISC_INT) == 0)
166                         break;
167
168                 switch (stat & 0xff) {
169                 case 0x1:
170                 case 0x2:
171                 case 0x10:
172                 case 0x11:
173                         qla2x00_mbx_completion(ha, MSW(stat));
174                         status |= MBX_INTERRUPT;
175
176                         /* Release mailbox registers. */
177                         WRT_REG_WORD(&reg->semaphore, 0);
178                         break;
179                 case 0x12:
180                         mb[0] = MSW(stat);
181                         mb[1] = RD_MAILBOX_REG(ha, reg, 1);
182                         mb[2] = RD_MAILBOX_REG(ha, reg, 2);
183                         mb[3] = RD_MAILBOX_REG(ha, reg, 3);
184                         qla2x00_async_event(ha, mb);
185                         break;
186                 case 0x13:
187                         qla2x00_process_response_queue(ha);
188                         break;
189                 case 0x15:
190                         mb[0] = MBA_CMPLT_1_16BIT;
191                         mb[1] = MSW(stat);
192                         qla2x00_async_event(ha, mb);
193                         break;
194                 case 0x16:
195                         mb[0] = MBA_SCSI_COMPLETION;
196                         mb[1] = MSW(stat);
197                         mb[2] = RD_MAILBOX_REG(ha, reg, 2);
198                         qla2x00_async_event(ha, mb);
199                         break;
200                 default:
201                         DEBUG2(printk("scsi(%ld): Unrecognized interrupt type "
202                             "(%d).\n",
203                             ha->host_no, stat & 0xff));
204                         break;
205                 }
206                 WRT_REG_WORD(&reg->hccr, HCCR_CLR_RISC_INT);
207                 RD_REG_WORD_RELAXED(&reg->hccr);
208         }
209         spin_unlock(&ha->hardware_lock);
210
211         if (test_bit(MBX_INTR_WAIT, &ha->mbx_cmd_flags) &&
212             (status & MBX_INTERRUPT) && ha->flags.mbox_int) {
213                 set_bit(MBX_INTERRUPT, &ha->mbx_cmd_flags);
214                 complete(&ha->mbx_intr_comp);
215         }
216
217         return (IRQ_HANDLED);
218 }
219
220 /**
221  * qla2x00_mbx_completion() - Process mailbox command completions.
222  * @ha: SCSI driver HA context
223  * @mb0: Mailbox0 register
224  */
225 static void
226 qla2x00_mbx_completion(scsi_qla_host_t *ha, uint16_t mb0)
227 {
228         uint16_t        cnt;
229         uint16_t __iomem *wptr;
230         struct device_reg_2xxx __iomem *reg = &ha->iobase->isp;
231
232         /* Load return mailbox registers. */
233         ha->flags.mbox_int = 1;
234         ha->mailbox_out[0] = mb0;
235         wptr = (uint16_t __iomem *)MAILBOX_REG(ha, reg, 1);
236
237         for (cnt = 1; cnt < ha->mbx_count; cnt++) {
238                 if (IS_QLA2200(ha) && cnt == 8)
239                         wptr = (uint16_t __iomem *)MAILBOX_REG(ha, reg, 8);
240                 if (cnt == 4 || cnt == 5)
241                         ha->mailbox_out[cnt] = qla2x00_debounce_register(wptr);
242                 else
243                         ha->mailbox_out[cnt] = RD_REG_WORD(wptr);
244
245                 wptr++;
246         }
247
248         if (ha->mcp) {
249                 DEBUG3(printk("%s(%ld): Got mailbox completion. cmd=%x.\n",
250                     __func__, ha->host_no, ha->mcp->mb[0]));
251         } else {
252                 DEBUG2_3(printk("%s(%ld): MBX pointer ERROR!\n",
253                     __func__, ha->host_no));
254         }
255 }
256
257 /**
258  * qla2x00_async_event() - Process aynchronous events.
259  * @ha: SCSI driver HA context
260  * @mb: Mailbox registers (0 - 3)
261  */
262 void
263 qla2x00_async_event(scsi_qla_host_t *ha, uint16_t *mb)
264 {
265 #define LS_UNKNOWN      2
266         static char     *link_speeds[5] = { "1", "2", "?", "4", "8" };
267         char            *link_speed;
268         uint16_t        handle_cnt;
269         uint16_t        cnt;
270         uint32_t        handles[5];
271         struct device_reg_2xxx __iomem *reg = &ha->iobase->isp;
272         uint32_t        rscn_entry, host_pid;
273         uint8_t         rscn_queue_index;
274         unsigned long   flags;
275
276         /* Setup to process RIO completion. */
277         handle_cnt = 0;
278         switch (mb[0]) {
279         case MBA_SCSI_COMPLETION:
280                 handles[0] = le32_to_cpu((uint32_t)((mb[2] << 16) | mb[1]));
281                 handle_cnt = 1;
282                 break;
283         case MBA_CMPLT_1_16BIT:
284                 handles[0] = mb[1];
285                 handle_cnt = 1;
286                 mb[0] = MBA_SCSI_COMPLETION;
287                 break;
288         case MBA_CMPLT_2_16BIT:
289                 handles[0] = mb[1];
290                 handles[1] = mb[2];
291                 handle_cnt = 2;
292                 mb[0] = MBA_SCSI_COMPLETION;
293                 break;
294         case MBA_CMPLT_3_16BIT:
295                 handles[0] = mb[1];
296                 handles[1] = mb[2];
297                 handles[2] = mb[3];
298                 handle_cnt = 3;
299                 mb[0] = MBA_SCSI_COMPLETION;
300                 break;
301         case MBA_CMPLT_4_16BIT:
302                 handles[0] = mb[1];
303                 handles[1] = mb[2];
304                 handles[2] = mb[3];
305                 handles[3] = (uint32_t)RD_MAILBOX_REG(ha, reg, 6);
306                 handle_cnt = 4;
307                 mb[0] = MBA_SCSI_COMPLETION;
308                 break;
309         case MBA_CMPLT_5_16BIT:
310                 handles[0] = mb[1];
311                 handles[1] = mb[2];
312                 handles[2] = mb[3];
313                 handles[3] = (uint32_t)RD_MAILBOX_REG(ha, reg, 6);
314                 handles[4] = (uint32_t)RD_MAILBOX_REG(ha, reg, 7);
315                 handle_cnt = 5;
316                 mb[0] = MBA_SCSI_COMPLETION;
317                 break;
318         case MBA_CMPLT_2_32BIT:
319                 handles[0] = le32_to_cpu((uint32_t)((mb[2] << 16) | mb[1]));
320                 handles[1] = le32_to_cpu(
321                     ((uint32_t)(RD_MAILBOX_REG(ha, reg, 7) << 16)) |
322                     RD_MAILBOX_REG(ha, reg, 6));
323                 handle_cnt = 2;
324                 mb[0] = MBA_SCSI_COMPLETION;
325                 break;
326         default:
327                 break;
328         }
329
330         switch (mb[0]) {
331         case MBA_SCSI_COMPLETION:       /* Fast Post */
332                 if (!ha->flags.online)
333                         break;
334
335                 for (cnt = 0; cnt < handle_cnt; cnt++)
336                         qla2x00_process_completed_request(ha, handles[cnt]);
337                 break;
338
339         case MBA_RESET:                 /* Reset */
340                 DEBUG2(printk("scsi(%ld): Asynchronous RESET.\n", ha->host_no));
341
342                 set_bit(RESET_MARKER_NEEDED, &ha->dpc_flags);
343                 break;
344
345         case MBA_SYSTEM_ERR:            /* System Error */
346                 qla_printk(KERN_INFO, ha,
347                     "ISP System Error - mbx1=%xh mbx2=%xh mbx3=%xh.\n",
348                     mb[1], mb[2], mb[3]);
349
350                 qla2x00_post_hwe_work(ha, mb[0], mb[1], mb[2], mb[3]);
351                 ha->isp_ops->fw_dump(ha, 1);
352
353                 if (IS_FWI2_CAPABLE(ha)) {
354                         if (mb[1] == 0 && mb[2] == 0) {
355                                 qla_printk(KERN_ERR, ha,
356                                     "Unrecoverable Hardware Error: adapter "
357                                     "marked OFFLINE!\n");
358                                 ha->flags.online = 0;
359                         } else
360                                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
361                 } else if (mb[1] == 0) {
362                         qla_printk(KERN_INFO, ha,
363                             "Unrecoverable Hardware Error: adapter marked "
364                             "OFFLINE!\n");
365                         ha->flags.online = 0;
366                 } else
367                         set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
368                 break;
369
370         case MBA_REQ_TRANSFER_ERR:      /* Request Transfer Error */
371                 DEBUG2(printk("scsi(%ld): ISP Request Transfer Error.\n",
372                     ha->host_no));
373                 qla_printk(KERN_WARNING, ha, "ISP Request Transfer Error.\n");
374
375                 qla2x00_post_hwe_work(ha, mb[0], mb[1], mb[2], mb[3]);
376                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
377                 break;
378
379         case MBA_RSP_TRANSFER_ERR:      /* Response Transfer Error */
380                 DEBUG2(printk("scsi(%ld): ISP Response Transfer Error.\n",
381                     ha->host_no));
382                 qla_printk(KERN_WARNING, ha, "ISP Response Transfer Error.\n");
383
384                 qla2x00_post_hwe_work(ha, mb[0], mb[1], mb[2], mb[3]);
385                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
386                 break;
387
388         case MBA_WAKEUP_THRES:          /* Request Queue Wake-up */
389                 DEBUG2(printk("scsi(%ld): Asynchronous WAKEUP_THRES.\n",
390                     ha->host_no));
391                 break;
392
393         case MBA_LIP_OCCURRED:          /* Loop Initialization Procedure */
394                 DEBUG2(printk("scsi(%ld): LIP occured (%x).\n", ha->host_no,
395                     mb[1]));
396                 qla_printk(KERN_INFO, ha, "LIP occured (%x).\n", mb[1]);
397
398                 if (atomic_read(&ha->loop_state) != LOOP_DOWN) {
399                         atomic_set(&ha->loop_state, LOOP_DOWN);
400                         atomic_set(&ha->loop_down_timer, LOOP_DOWN_TIME);
401                         qla2x00_mark_all_devices_lost(ha, 1);
402                 }
403
404                 if (ha->parent) {
405                         atomic_set(&ha->vp_state, VP_FAILED);
406                         fc_vport_set_state(ha->fc_vport, FC_VPORT_FAILED);
407                 }
408
409                 set_bit(REGISTER_FC4_NEEDED, &ha->dpc_flags);
410                 set_bit(REGISTER_FDMI_NEEDED, &ha->dpc_flags);
411
412                 ha->flags.management_server_logged_in = 0;
413                 qla2x00_post_aen_work(ha, FCH_EVT_LIP, mb[1]);
414                 break;
415
416         case MBA_LOOP_UP:               /* Loop Up Event */
417                 if (IS_QLA2100(ha) || IS_QLA2200(ha)) {
418                         link_speed = link_speeds[0];
419                         ha->link_data_rate = PORT_SPEED_1GB;
420                 } else {
421                         link_speed = link_speeds[LS_UNKNOWN];
422                         if (mb[1] < 5)
423                                 link_speed = link_speeds[mb[1]];
424                         ha->link_data_rate = mb[1];
425                 }
426
427                 DEBUG2(printk("scsi(%ld): Asynchronous LOOP UP (%s Gbps).\n",
428                     ha->host_no, link_speed));
429                 qla_printk(KERN_INFO, ha, "LOOP UP detected (%s Gbps).\n",
430                     link_speed);
431
432                 ha->flags.management_server_logged_in = 0;
433                 qla2x00_post_aen_work(ha, FCH_EVT_LINKUP, ha->link_data_rate);
434                 break;
435
436         case MBA_LOOP_DOWN:             /* Loop Down Event */
437                 DEBUG2(printk("scsi(%ld): Asynchronous LOOP DOWN "
438                     "(%x %x %x).\n", ha->host_no, mb[1], mb[2], mb[3]));
439                 qla_printk(KERN_INFO, ha, "LOOP DOWN detected (%x %x %x).\n",
440                     mb[1], mb[2], mb[3]);
441
442                 if (atomic_read(&ha->loop_state) != LOOP_DOWN) {
443                         atomic_set(&ha->loop_state, LOOP_DOWN);
444                         atomic_set(&ha->loop_down_timer, LOOP_DOWN_TIME);
445                         ha->device_flags |= DFLG_NO_CABLE;
446                         qla2x00_mark_all_devices_lost(ha, 1);
447                 }
448
449                 if (ha->parent) {
450                         atomic_set(&ha->vp_state, VP_FAILED);
451                         fc_vport_set_state(ha->fc_vport, FC_VPORT_FAILED);
452                 }
453
454                 ha->flags.management_server_logged_in = 0;
455                 ha->link_data_rate = PORT_SPEED_UNKNOWN;
456                 qla2x00_post_aen_work(ha, FCH_EVT_LINKDOWN, 0);
457                 break;
458
459         case MBA_LIP_RESET:             /* LIP reset occurred */
460                 DEBUG2(printk("scsi(%ld): Asynchronous LIP RESET (%x).\n",
461                     ha->host_no, mb[1]));
462                 qla_printk(KERN_INFO, ha,
463                     "LIP reset occured (%x).\n", mb[1]);
464
465                 if (atomic_read(&ha->loop_state) != LOOP_DOWN) {
466                         atomic_set(&ha->loop_state, LOOP_DOWN);
467                         atomic_set(&ha->loop_down_timer, LOOP_DOWN_TIME);
468                         qla2x00_mark_all_devices_lost(ha, 1);
469                 }
470
471                 if (ha->parent) {
472                         atomic_set(&ha->vp_state, VP_FAILED);
473                         fc_vport_set_state(ha->fc_vport, FC_VPORT_FAILED);
474                 }
475
476                 set_bit(RESET_MARKER_NEEDED, &ha->dpc_flags);
477
478                 ha->operating_mode = LOOP;
479                 ha->flags.management_server_logged_in = 0;
480                 qla2x00_post_aen_work(ha, FCH_EVT_LIPRESET, mb[1]);
481                 break;
482
483         case MBA_POINT_TO_POINT:        /* Point-to-Point */
484                 if (IS_QLA2100(ha))
485                         break;
486
487                 DEBUG2(printk("scsi(%ld): Asynchronous P2P MODE received.\n",
488                     ha->host_no));
489
490                 /*
491                  * Until there's a transition from loop down to loop up, treat
492                  * this as loop down only.
493                  */
494                 if (atomic_read(&ha->loop_state) != LOOP_DOWN) {
495                         atomic_set(&ha->loop_state, LOOP_DOWN);
496                         if (!atomic_read(&ha->loop_down_timer))
497                                 atomic_set(&ha->loop_down_timer,
498                                     LOOP_DOWN_TIME);
499                         qla2x00_mark_all_devices_lost(ha, 1);
500                 }
501
502                 if (ha->parent) {
503                         atomic_set(&ha->vp_state, VP_FAILED);
504                         fc_vport_set_state(ha->fc_vport, FC_VPORT_FAILED);
505                 }
506
507                 if (!(test_bit(ABORT_ISP_ACTIVE, &ha->dpc_flags))) {
508                         set_bit(RESET_MARKER_NEEDED, &ha->dpc_flags);
509                 }
510                 set_bit(REGISTER_FC4_NEEDED, &ha->dpc_flags);
511                 set_bit(REGISTER_FDMI_NEEDED, &ha->dpc_flags);
512
513                 ha->flags.gpsc_supported = 1;
514                 ha->flags.management_server_logged_in = 0;
515                 break;
516
517         case MBA_CHG_IN_CONNECTION:     /* Change in connection mode */
518                 if (IS_QLA2100(ha))
519                         break;
520
521                 DEBUG2(printk("scsi(%ld): Asynchronous Change In Connection "
522                     "received.\n",
523                     ha->host_no));
524                 qla_printk(KERN_INFO, ha,
525                     "Configuration change detected: value=%x.\n", mb[1]);
526
527                 if (atomic_read(&ha->loop_state) != LOOP_DOWN) {
528                         atomic_set(&ha->loop_state, LOOP_DOWN);
529                         if (!atomic_read(&ha->loop_down_timer))
530                                 atomic_set(&ha->loop_down_timer,
531                                     LOOP_DOWN_TIME);
532                         qla2x00_mark_all_devices_lost(ha, 1);
533                 }
534
535                 if (ha->parent) {
536                         atomic_set(&ha->vp_state, VP_FAILED);
537                         fc_vport_set_state(ha->fc_vport, FC_VPORT_FAILED);
538                 }
539
540                 set_bit(LOOP_RESYNC_NEEDED, &ha->dpc_flags);
541                 set_bit(LOCAL_LOOP_UPDATE, &ha->dpc_flags);
542                 break;
543
544         case MBA_PORT_UPDATE:           /* Port database update */
545                 /*
546                  * If PORT UPDATE is global (recieved LIP_OCCURED/LIP_RESET
547                  * event etc. earlier indicating loop is down) then process
548                  * it.  Otherwise ignore it and Wait for RSCN to come in.
549                  */
550                 atomic_set(&ha->loop_down_timer, 0);
551                 if (atomic_read(&ha->loop_state) != LOOP_DOWN &&
552                     atomic_read(&ha->loop_state) != LOOP_DEAD) {
553                         DEBUG2(printk("scsi(%ld): Asynchronous PORT UPDATE "
554                             "ignored %04x/%04x/%04x.\n", ha->host_no, mb[1],
555                             mb[2], mb[3]));
556                         break;
557                 }
558
559                 DEBUG2(printk("scsi(%ld): Asynchronous PORT UPDATE.\n",
560                     ha->host_no));
561                 DEBUG(printk(KERN_INFO
562                     "scsi(%ld): Port database changed %04x %04x %04x.\n",
563                     ha->host_no, mb[1], mb[2], mb[3]));
564
565                 /*
566                  * Mark all devices as missing so we will login again.
567                  */
568                 atomic_set(&ha->loop_state, LOOP_UP);
569
570                 qla2x00_mark_all_devices_lost(ha, 1);
571
572                 ha->flags.rscn_queue_overflow = 1;
573
574                 set_bit(LOOP_RESYNC_NEEDED, &ha->dpc_flags);
575                 set_bit(LOCAL_LOOP_UPDATE, &ha->dpc_flags);
576                 break;
577
578         case MBA_RSCN_UPDATE:           /* State Change Registration */
579                 /* Check if the Vport has issued a SCR */
580                 if (ha->parent && test_bit(VP_SCR_NEEDED, &ha->vp_flags))
581                         break;
582                 /* Only handle SCNs for our Vport index. */
583                 if (ha->parent && ha->vp_idx != (mb[3] & 0xff))
584                         break;
585
586                 DEBUG2(printk("scsi(%ld): Asynchronous RSCR UPDATE.\n",
587                     ha->host_no));
588                 DEBUG(printk(KERN_INFO
589                     "scsi(%ld): RSCN database changed -- %04x %04x %04x.\n",
590                     ha->host_no, mb[1], mb[2], mb[3]));
591
592                 rscn_entry = (mb[1] << 16) | mb[2];
593                 host_pid = (ha->d_id.b.domain << 16) | (ha->d_id.b.area << 8) |
594                     ha->d_id.b.al_pa;
595                 if (rscn_entry == host_pid) {
596                         DEBUG(printk(KERN_INFO
597                             "scsi(%ld): Ignoring RSCN update to local host "
598                             "port ID (%06x)\n",
599                             ha->host_no, host_pid));
600                         break;
601                 }
602
603                 rscn_queue_index = ha->rscn_in_ptr + 1;
604                 if (rscn_queue_index == MAX_RSCN_COUNT)
605                         rscn_queue_index = 0;
606                 if (rscn_queue_index != ha->rscn_out_ptr) {
607                         ha->rscn_queue[ha->rscn_in_ptr] = rscn_entry;
608                         ha->rscn_in_ptr = rscn_queue_index;
609                 } else {
610                         ha->flags.rscn_queue_overflow = 1;
611                 }
612
613                 atomic_set(&ha->loop_state, LOOP_UPDATE);
614                 atomic_set(&ha->loop_down_timer, 0);
615                 ha->flags.management_server_logged_in = 0;
616
617                 set_bit(LOOP_RESYNC_NEEDED, &ha->dpc_flags);
618                 set_bit(RSCN_UPDATE, &ha->dpc_flags);
619                 qla2x00_post_aen_work(ha, FCH_EVT_RSCN, rscn_entry);
620                 break;
621
622         /* case MBA_RIO_RESPONSE: */
623         case MBA_ZIO_RESPONSE:
624                 DEBUG2(printk("scsi(%ld): [R|Z]IO update completion.\n",
625                     ha->host_no));
626                 DEBUG(printk(KERN_INFO
627                     "scsi(%ld): [R|Z]IO update completion.\n",
628                     ha->host_no));
629
630                 if (IS_FWI2_CAPABLE(ha))
631                         qla24xx_process_response_queue(ha);
632                 else
633                         qla2x00_process_response_queue(ha);
634                 break;
635
636         case MBA_DISCARD_RND_FRAME:
637                 DEBUG2(printk("scsi(%ld): Discard RND Frame -- %04x %04x "
638                     "%04x.\n", ha->host_no, mb[1], mb[2], mb[3]));
639                 break;
640
641         case MBA_TRACE_NOTIFICATION:
642                 DEBUG2(printk("scsi(%ld): Trace Notification -- %04x %04x.\n",
643                 ha->host_no, mb[1], mb[2]));
644                 break;
645
646         case MBA_ISP84XX_ALERT:
647                 DEBUG2(printk("scsi(%ld): ISP84XX Alert Notification -- "
648                     "%04x %04x %04x\n", ha->host_no, mb[1], mb[2], mb[3]));
649
650                 spin_lock_irqsave(&ha->cs84xx->access_lock, flags);
651                 switch (mb[1]) {
652                 case A84_PANIC_RECOVERY:
653                         qla_printk(KERN_INFO, ha, "Alert 84XX: panic recovery "
654                             "%04x %04x\n", mb[2], mb[3]);
655                         break;
656                 case A84_OP_LOGIN_COMPLETE:
657                         ha->cs84xx->op_fw_version = mb[3] << 16 | mb[2];
658                         DEBUG2(qla_printk(KERN_INFO, ha, "Alert 84XX:"
659                             "firmware version %x\n", ha->cs84xx->op_fw_version));
660                         break;
661                 case A84_DIAG_LOGIN_COMPLETE:
662                         ha->cs84xx->diag_fw_version = mb[3] << 16 | mb[2];
663                         DEBUG2(qla_printk(KERN_INFO, ha, "Alert 84XX:"
664                             "diagnostic firmware version %x\n",
665                             ha->cs84xx->diag_fw_version));
666                         break;
667                 case A84_GOLD_LOGIN_COMPLETE:
668                         ha->cs84xx->diag_fw_version = mb[3] << 16 | mb[2];
669                         ha->cs84xx->fw_update = 1;
670                         DEBUG2(qla_printk(KERN_INFO, ha, "Alert 84XX: gold "
671                             "firmware version %x\n",
672                             ha->cs84xx->gold_fw_version));
673                         break;
674                 default:
675                         qla_printk(KERN_ERR, ha,
676                             "Alert 84xx: Invalid Alert %04x %04x %04x\n",
677                             mb[1], mb[2], mb[3]);
678                 }
679                 spin_unlock_irqrestore(&ha->cs84xx->access_lock, flags);
680                 break;
681         }
682
683         if (!ha->parent && ha->num_vhosts)
684                 qla2x00_alert_all_vps(ha, mb);
685 }
686
687 static void
688 qla2x00_adjust_sdev_qdepth_up(struct scsi_device *sdev, void *data)
689 {
690         fc_port_t *fcport = data;
691
692         if (fcport->ha->max_q_depth <= sdev->queue_depth)
693                 return;
694
695         if (sdev->ordered_tags)
696                 scsi_adjust_queue_depth(sdev, MSG_ORDERED_TAG,
697                     sdev->queue_depth + 1);
698         else
699                 scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG,
700                     sdev->queue_depth + 1);
701
702         fcport->last_ramp_up = jiffies;
703
704         DEBUG2(qla_printk(KERN_INFO, fcport->ha,
705             "scsi(%ld:%d:%d:%d): Queue depth adjusted-up to %d.\n",
706             fcport->ha->host_no, sdev->channel, sdev->id, sdev->lun,
707             sdev->queue_depth));
708 }
709
710 static void
711 qla2x00_adjust_sdev_qdepth_down(struct scsi_device *sdev, void *data)
712 {
713         fc_port_t *fcport = data;
714
715         if (!scsi_track_queue_full(sdev, sdev->queue_depth - 1))
716                 return;
717
718         DEBUG2(qla_printk(KERN_INFO, fcport->ha,
719             "scsi(%ld:%d:%d:%d): Queue depth adjusted-down to %d.\n",
720             fcport->ha->host_no, sdev->channel, sdev->id, sdev->lun,
721             sdev->queue_depth));
722 }
723
724 static inline void
725 qla2x00_ramp_up_queue_depth(scsi_qla_host_t *ha, srb_t *sp)
726 {
727         fc_port_t *fcport;
728         struct scsi_device *sdev;
729
730         sdev = sp->cmd->device;
731         if (sdev->queue_depth >= ha->max_q_depth)
732                 return;
733
734         fcport = sp->fcport;
735         if (time_before(jiffies,
736             fcport->last_ramp_up + ql2xqfullrampup * HZ))
737                 return;
738         if (time_before(jiffies,
739             fcport->last_queue_full + ql2xqfullrampup * HZ))
740                 return;
741
742         starget_for_each_device(sdev->sdev_target, fcport,
743             qla2x00_adjust_sdev_qdepth_up);
744 }
745
746 /**
747  * qla2x00_process_completed_request() - Process a Fast Post response.
748  * @ha: SCSI driver HA context
749  * @index: SRB index
750  */
751 static void
752 qla2x00_process_completed_request(struct scsi_qla_host *ha, uint32_t index)
753 {
754         srb_t *sp;
755
756         /* Validate handle. */
757         if (index >= MAX_OUTSTANDING_COMMANDS) {
758                 DEBUG2(printk("scsi(%ld): Invalid SCSI completion handle %d.\n",
759                     ha->host_no, index));
760                 qla_printk(KERN_WARNING, ha,
761                     "Invalid SCSI completion handle %d.\n", index);
762
763                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
764                 return;
765         }
766
767         sp = ha->outstanding_cmds[index];
768         if (sp) {
769                 /* Free outstanding command slot. */
770                 ha->outstanding_cmds[index] = NULL;
771
772                 CMD_COMPL_STATUS(sp->cmd) = 0L;
773                 CMD_SCSI_STATUS(sp->cmd) = 0L;
774
775                 /* Save ISP completion status */
776                 sp->cmd->result = DID_OK << 16;
777
778                 qla2x00_ramp_up_queue_depth(ha, sp);
779                 qla2x00_sp_compl(ha, sp);
780         } else {
781                 DEBUG2(printk("scsi(%ld): Invalid ISP SCSI completion handle\n",
782                     ha->host_no));
783                 qla_printk(KERN_WARNING, ha,
784                     "Invalid ISP SCSI completion handle\n");
785
786                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
787         }
788 }
789
790 /**
791  * qla2x00_process_response_queue() - Process response queue entries.
792  * @ha: SCSI driver HA context
793  */
794 void
795 qla2x00_process_response_queue(struct scsi_qla_host *ha)
796 {
797         struct device_reg_2xxx __iomem *reg = &ha->iobase->isp;
798         sts_entry_t     *pkt;
799         uint16_t        handle_cnt;
800         uint16_t        cnt;
801
802         if (!ha->flags.online)
803                 return;
804
805         while (ha->response_ring_ptr->signature != RESPONSE_PROCESSED) {
806                 pkt = (sts_entry_t *)ha->response_ring_ptr;
807
808                 ha->rsp_ring_index++;
809                 if (ha->rsp_ring_index == ha->response_q_length) {
810                         ha->rsp_ring_index = 0;
811                         ha->response_ring_ptr = ha->response_ring;
812                 } else {
813                         ha->response_ring_ptr++;
814                 }
815
816                 if (pkt->entry_status != 0) {
817                         DEBUG3(printk(KERN_INFO
818                             "scsi(%ld): Process error entry.\n", ha->host_no));
819
820                         qla2x00_error_entry(ha, pkt);
821                         ((response_t *)pkt)->signature = RESPONSE_PROCESSED;
822                         wmb();
823                         continue;
824                 }
825
826                 switch (pkt->entry_type) {
827                 case STATUS_TYPE:
828                         qla2x00_status_entry(ha, pkt);
829                         break;
830                 case STATUS_TYPE_21:
831                         handle_cnt = ((sts21_entry_t *)pkt)->handle_count;
832                         for (cnt = 0; cnt < handle_cnt; cnt++) {
833                                 qla2x00_process_completed_request(ha,
834                                     ((sts21_entry_t *)pkt)->handle[cnt]);
835                         }
836                         break;
837                 case STATUS_TYPE_22:
838                         handle_cnt = ((sts22_entry_t *)pkt)->handle_count;
839                         for (cnt = 0; cnt < handle_cnt; cnt++) {
840                                 qla2x00_process_completed_request(ha,
841                                     ((sts22_entry_t *)pkt)->handle[cnt]);
842                         }
843                         break;
844                 case STATUS_CONT_TYPE:
845                         qla2x00_status_cont_entry(ha, (sts_cont_entry_t *)pkt);
846                         break;
847                 default:
848                         /* Type Not Supported. */
849                         DEBUG4(printk(KERN_WARNING
850                             "scsi(%ld): Received unknown response pkt type %x "
851                             "entry status=%x.\n",
852                             ha->host_no, pkt->entry_type, pkt->entry_status));
853                         break;
854                 }
855                 ((response_t *)pkt)->signature = RESPONSE_PROCESSED;
856                 wmb();
857         }
858
859         /* Adjust ring index */
860         WRT_REG_WORD(ISP_RSP_Q_OUT(ha, reg), ha->rsp_ring_index);
861 }
862
863 static inline void
864 qla2x00_handle_sense(srb_t *sp, uint8_t *sense_data, uint32_t sense_len)
865 {
866         struct scsi_cmnd *cp = sp->cmd;
867
868         if (sense_len >= SCSI_SENSE_BUFFERSIZE)
869                 sense_len = SCSI_SENSE_BUFFERSIZE;
870
871         CMD_ACTUAL_SNSLEN(cp) = sense_len;
872         sp->request_sense_length = sense_len;
873         sp->request_sense_ptr = cp->sense_buffer;
874         if (sp->request_sense_length > 32)
875                 sense_len = 32;
876
877         memcpy(cp->sense_buffer, sense_data, sense_len);
878
879         sp->request_sense_ptr += sense_len;
880         sp->request_sense_length -= sense_len;
881         if (sp->request_sense_length != 0)
882                 sp->fcport->ha->status_srb = sp;
883
884         DEBUG5(printk("%s(): Check condition Sense data, scsi(%ld:%d:%d:%d) "
885             "cmd=%p pid=%ld\n", __func__, sp->fcport->ha->host_no,
886             cp->device->channel, cp->device->id, cp->device->lun, cp,
887             cp->serial_number));
888         if (sense_len)
889                 DEBUG5(qla2x00_dump_buffer(cp->sense_buffer,
890                     CMD_ACTUAL_SNSLEN(cp)));
891 }
892
893 /**
894  * qla2x00_status_entry() - Process a Status IOCB entry.
895  * @ha: SCSI driver HA context
896  * @pkt: Entry pointer
897  */
898 static void
899 qla2x00_status_entry(scsi_qla_host_t *ha, void *pkt)
900 {
901         srb_t           *sp;
902         fc_port_t       *fcport;
903         struct scsi_cmnd *cp;
904         sts_entry_t *sts;
905         struct sts_entry_24xx *sts24;
906         uint16_t        comp_status;
907         uint16_t        scsi_status;
908         uint8_t         lscsi_status;
909         int32_t         resid;
910         uint32_t        sense_len, rsp_info_len, resid_len, fw_resid_len;
911         uint8_t         *rsp_info, *sense_data;
912
913         sts = (sts_entry_t *) pkt;
914         sts24 = (struct sts_entry_24xx *) pkt;
915         if (IS_FWI2_CAPABLE(ha)) {
916                 comp_status = le16_to_cpu(sts24->comp_status);
917                 scsi_status = le16_to_cpu(sts24->scsi_status) & SS_MASK;
918         } else {
919                 comp_status = le16_to_cpu(sts->comp_status);
920                 scsi_status = le16_to_cpu(sts->scsi_status) & SS_MASK;
921         }
922
923         /* Fast path completion. */
924         if (comp_status == CS_COMPLETE && scsi_status == 0) {
925                 qla2x00_process_completed_request(ha, sts->handle);
926
927                 return;
928         }
929
930         /* Validate handle. */
931         if (sts->handle < MAX_OUTSTANDING_COMMANDS) {
932                 sp = ha->outstanding_cmds[sts->handle];
933                 ha->outstanding_cmds[sts->handle] = NULL;
934         } else
935                 sp = NULL;
936
937         if (sp == NULL) {
938                 DEBUG2(printk("scsi(%ld): Status Entry invalid handle.\n",
939                     ha->host_no));
940                 qla_printk(KERN_WARNING, ha, "Status Entry invalid handle.\n");
941
942                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
943                 qla2xxx_wake_dpc(ha);
944                 return;
945         }
946         cp = sp->cmd;
947         if (cp == NULL) {
948                 DEBUG2(printk("scsi(%ld): Command already returned back to OS "
949                     "pkt->handle=%d sp=%p.\n", ha->host_no, sts->handle, sp));
950                 qla_printk(KERN_WARNING, ha,
951                     "Command is NULL: already returned to OS (sp=%p)\n", sp);
952
953                 return;
954         }
955
956         lscsi_status = scsi_status & STATUS_MASK;
957         CMD_ENTRY_STATUS(cp) = sts->entry_status;
958         CMD_COMPL_STATUS(cp) = comp_status;
959         CMD_SCSI_STATUS(cp) = scsi_status;
960
961         fcport = sp->fcport;
962
963         sense_len = rsp_info_len = resid_len = fw_resid_len = 0;
964         if (IS_FWI2_CAPABLE(ha)) {
965                 sense_len = le32_to_cpu(sts24->sense_len);
966                 rsp_info_len = le32_to_cpu(sts24->rsp_data_len);
967                 resid_len = le32_to_cpu(sts24->rsp_residual_count);
968                 fw_resid_len = le32_to_cpu(sts24->residual_len);
969                 rsp_info = sts24->data;
970                 sense_data = sts24->data;
971                 host_to_fcp_swap(sts24->data, sizeof(sts24->data));
972         } else {
973                 sense_len = le16_to_cpu(sts->req_sense_length);
974                 rsp_info_len = le16_to_cpu(sts->rsp_info_len);
975                 resid_len = le32_to_cpu(sts->residual_length);
976                 rsp_info = sts->rsp_info;
977                 sense_data = sts->req_sense_data;
978         }
979
980         /* Check for any FCP transport errors. */
981         if (scsi_status & SS_RESPONSE_INFO_LEN_VALID) {
982                 /* Sense data lies beyond any FCP RESPONSE data. */
983                 if (IS_FWI2_CAPABLE(ha))
984                         sense_data += rsp_info_len;
985                 if (rsp_info_len > 3 && rsp_info[3]) {
986                         DEBUG2(printk("scsi(%ld:%d:%d:%d) FCP I/O protocol "
987                             "failure (%x/%02x%02x%02x%02x%02x%02x%02x%02x)..."
988                             "retrying command\n", ha->host_no,
989                             cp->device->channel, cp->device->id,
990                             cp->device->lun, rsp_info_len, rsp_info[0],
991                             rsp_info[1], rsp_info[2], rsp_info[3], rsp_info[4],
992                             rsp_info[5], rsp_info[6], rsp_info[7]));
993
994                         cp->result = DID_BUS_BUSY << 16;
995                         qla2x00_sp_compl(ha, sp);
996                         return;
997                 }
998         }
999
1000         /* Check for overrun. */
1001         if (IS_FWI2_CAPABLE(ha) && comp_status == CS_COMPLETE &&
1002             scsi_status & SS_RESIDUAL_OVER)
1003                 comp_status = CS_DATA_OVERRUN;
1004
1005         /*
1006          * Based on Host and scsi status generate status code for Linux
1007          */
1008         switch (comp_status) {
1009         case CS_COMPLETE:
1010         case CS_QUEUE_FULL:
1011                 if (scsi_status == 0) {
1012                         cp->result = DID_OK << 16;
1013                         break;
1014                 }
1015                 if (scsi_status & (SS_RESIDUAL_UNDER | SS_RESIDUAL_OVER)) {
1016                         resid = resid_len;
1017                         scsi_set_resid(cp, resid);
1018                         CMD_RESID_LEN(cp) = resid;
1019
1020                         if (!lscsi_status &&
1021                             ((unsigned)(scsi_bufflen(cp) - resid) <
1022                              cp->underflow)) {
1023                                 qla_printk(KERN_INFO, ha,
1024                                            "scsi(%ld:%d:%d:%d): Mid-layer underflow "
1025                                            "detected (%x of %x bytes)...returning "
1026                                            "error status.\n", ha->host_no,
1027                                            cp->device->channel, cp->device->id,
1028                                            cp->device->lun, resid,
1029                                            scsi_bufflen(cp));
1030
1031                                 cp->result = DID_ERROR << 16;
1032                                 break;
1033                         }
1034                 }
1035                 cp->result = DID_OK << 16 | lscsi_status;
1036
1037                 if (lscsi_status == SAM_STAT_TASK_SET_FULL) {
1038                         DEBUG2(printk(KERN_INFO
1039                             "scsi(%ld): QUEUE FULL status detected "
1040                             "0x%x-0x%x.\n", ha->host_no, comp_status,
1041                             scsi_status));
1042
1043                         /* Adjust queue depth for all luns on the port. */
1044                         fcport->last_queue_full = jiffies;
1045                         starget_for_each_device(cp->device->sdev_target,
1046                             fcport, qla2x00_adjust_sdev_qdepth_down);
1047                         break;
1048                 }
1049                 if (lscsi_status != SS_CHECK_CONDITION)
1050                         break;
1051
1052                 memset(cp->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
1053                 if (!(scsi_status & SS_SENSE_LEN_VALID))
1054                         break;
1055
1056                 qla2x00_handle_sense(sp, sense_data, sense_len);
1057                 break;
1058
1059         case CS_DATA_UNDERRUN:
1060                 resid = resid_len;
1061                 /* Use F/W calculated residual length. */
1062                 if (IS_FWI2_CAPABLE(ha)) {
1063                         if (scsi_status & SS_RESIDUAL_UNDER &&
1064                             resid != fw_resid_len) {
1065                                 scsi_status &= ~SS_RESIDUAL_UNDER;
1066                                 lscsi_status = 0;
1067                         }
1068                         resid = fw_resid_len;
1069                 }
1070
1071                 if (scsi_status & SS_RESIDUAL_UNDER) {
1072                         scsi_set_resid(cp, resid);
1073                         CMD_RESID_LEN(cp) = resid;
1074                 } else {
1075                         DEBUG2(printk(KERN_INFO
1076                             "scsi(%ld:%d:%d) UNDERRUN status detected "
1077                             "0x%x-0x%x. resid=0x%x fw_resid=0x%x cdb=0x%x "
1078                             "os_underflow=0x%x\n", ha->host_no,
1079                             cp->device->id, cp->device->lun, comp_status,
1080                             scsi_status, resid_len, resid, cp->cmnd[0],
1081                             cp->underflow));
1082
1083                 }
1084
1085                 /*
1086                  * Check to see if SCSI Status is non zero. If so report SCSI
1087                  * Status.
1088                  */
1089                 if (lscsi_status != 0) {
1090                         cp->result = DID_OK << 16 | lscsi_status;
1091
1092                         if (lscsi_status == SAM_STAT_TASK_SET_FULL) {
1093                                 DEBUG2(printk(KERN_INFO
1094                                     "scsi(%ld): QUEUE FULL status detected "
1095                                     "0x%x-0x%x.\n", ha->host_no, comp_status,
1096                                     scsi_status));
1097
1098                                 /*
1099                                  * Adjust queue depth for all luns on the
1100                                  * port.
1101                                  */
1102                                 fcport->last_queue_full = jiffies;
1103                                 starget_for_each_device(
1104                                     cp->device->sdev_target, fcport,
1105                                     qla2x00_adjust_sdev_qdepth_down);
1106                                 break;
1107                         }
1108                         if (lscsi_status != SS_CHECK_CONDITION)
1109                                 break;
1110
1111                         memset(cp->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
1112                         if (!(scsi_status & SS_SENSE_LEN_VALID))
1113                                 break;
1114
1115                         qla2x00_handle_sense(sp, sense_data, sense_len);
1116                 } else {
1117                         /*
1118                          * If RISC reports underrun and target does not report
1119                          * it then we must have a lost frame, so tell upper
1120                          * layer to retry it by reporting a bus busy.
1121                          */
1122                         if (!(scsi_status & SS_RESIDUAL_UNDER)) {
1123                                 DEBUG2(printk("scsi(%ld:%d:%d:%d) Dropped "
1124                                               "frame(s) detected (%x of %x bytes)..."
1125                                               "retrying command.\n", ha->host_no,
1126                                               cp->device->channel, cp->device->id,
1127                                               cp->device->lun, resid,
1128                                               scsi_bufflen(cp)));
1129
1130                                 cp->result = DID_BUS_BUSY << 16;
1131                                 break;
1132                         }
1133
1134                         /* Handle mid-layer underflow */
1135                         if ((unsigned)(scsi_bufflen(cp) - resid) <
1136                             cp->underflow) {
1137                                 qla_printk(KERN_INFO, ha,
1138                                            "scsi(%ld:%d:%d:%d): Mid-layer underflow "
1139                                            "detected (%x of %x bytes)...returning "
1140                                            "error status.\n", ha->host_no,
1141                                            cp->device->channel, cp->device->id,
1142                                            cp->device->lun, resid,
1143                                            scsi_bufflen(cp));
1144
1145                                 cp->result = DID_ERROR << 16;
1146                                 break;
1147                         }
1148
1149                         /* Everybody online, looking good... */
1150                         cp->result = DID_OK << 16;
1151                 }
1152                 break;
1153
1154         case CS_DATA_OVERRUN:
1155                 DEBUG2(printk(KERN_INFO
1156                     "scsi(%ld:%d:%d): OVERRUN status detected 0x%x-0x%x\n",
1157                     ha->host_no, cp->device->id, cp->device->lun, comp_status,
1158                     scsi_status));
1159                 DEBUG2(printk(KERN_INFO
1160                     "CDB: 0x%x 0x%x 0x%x 0x%x 0x%x 0x%x\n",
1161                     cp->cmnd[0], cp->cmnd[1], cp->cmnd[2], cp->cmnd[3],
1162                     cp->cmnd[4], cp->cmnd[5]));
1163                 DEBUG2(printk(KERN_INFO
1164                     "PID=0x%lx req=0x%x xtra=0x%x -- returning DID_ERROR "
1165                     "status!\n",
1166                     cp->serial_number, scsi_bufflen(cp), resid_len));
1167
1168                 cp->result = DID_ERROR << 16;
1169                 break;
1170
1171         case CS_PORT_LOGGED_OUT:
1172         case CS_PORT_CONFIG_CHG:
1173         case CS_PORT_BUSY:
1174         case CS_INCOMPLETE:
1175         case CS_PORT_UNAVAILABLE:
1176                 /*
1177                  * If the port is in Target Down state, return all IOs for this
1178                  * Target with DID_NO_CONNECT ELSE Queue the IOs in the
1179                  * retry_queue.
1180                  */
1181                 DEBUG2(printk("scsi(%ld:%d:%d): status_entry: Port Down "
1182                     "pid=%ld, compl status=0x%x, port state=0x%x\n",
1183                     ha->host_no, cp->device->id, cp->device->lun,
1184                     cp->serial_number, comp_status,
1185                     atomic_read(&fcport->state)));
1186
1187                 cp->result = DID_BUS_BUSY << 16;
1188                 if (atomic_read(&fcport->state) == FCS_ONLINE)
1189                         qla2x00_mark_device_lost(fcport->ha, fcport, 1, 1);
1190                 break;
1191
1192         case CS_RESET:
1193                 DEBUG2(printk(KERN_INFO
1194                     "scsi(%ld): RESET status detected 0x%x-0x%x.\n",
1195                     ha->host_no, comp_status, scsi_status));
1196
1197                 cp->result = DID_RESET << 16;
1198                 break;
1199
1200         case CS_ABORTED:
1201                 /*
1202                  * hv2.19.12 - DID_ABORT does not retry the request if we
1203                  * aborted this request then abort otherwise it must be a
1204                  * reset.
1205                  */
1206                 DEBUG2(printk(KERN_INFO
1207                     "scsi(%ld): ABORT status detected 0x%x-0x%x.\n",
1208                     ha->host_no, comp_status, scsi_status));
1209
1210                 cp->result = DID_RESET << 16;
1211                 break;
1212
1213         case CS_TIMEOUT:
1214                 cp->result = DID_BUS_BUSY << 16;
1215
1216                 if (IS_FWI2_CAPABLE(ha)) {
1217                         DEBUG2(printk(KERN_INFO
1218                             "scsi(%ld:%d:%d:%d): TIMEOUT status detected "
1219                             "0x%x-0x%x\n", ha->host_no, cp->device->channel,
1220                             cp->device->id, cp->device->lun, comp_status,
1221                             scsi_status));
1222                         break;
1223                 }
1224                 DEBUG2(printk(KERN_INFO
1225                     "scsi(%ld:%d:%d:%d): TIMEOUT status detected 0x%x-0x%x "
1226                     "sflags=%x.\n", ha->host_no, cp->device->channel,
1227                     cp->device->id, cp->device->lun, comp_status, scsi_status,
1228                     le16_to_cpu(sts->status_flags)));
1229
1230                 /* Check to see if logout occurred. */
1231                 if ((le16_to_cpu(sts->status_flags) & SF_LOGOUT_SENT))
1232                         qla2x00_mark_device_lost(fcport->ha, fcport, 1, 1);
1233                 break;
1234
1235         default:
1236                 DEBUG3(printk("scsi(%ld): Error detected (unknown status) "
1237                     "0x%x-0x%x.\n", ha->host_no, comp_status, scsi_status));
1238                 qla_printk(KERN_INFO, ha,
1239                     "Unknown status detected 0x%x-0x%x.\n",
1240                     comp_status, scsi_status);
1241
1242                 cp->result = DID_ERROR << 16;
1243                 break;
1244         }
1245
1246         /* Place command on done queue. */
1247         if (ha->status_srb == NULL)
1248                 qla2x00_sp_compl(ha, sp);
1249 }
1250
1251 /**
1252  * qla2x00_status_cont_entry() - Process a Status Continuations entry.
1253  * @ha: SCSI driver HA context
1254  * @pkt: Entry pointer
1255  *
1256  * Extended sense data.
1257  */
1258 static void
1259 qla2x00_status_cont_entry(scsi_qla_host_t *ha, sts_cont_entry_t *pkt)
1260 {
1261         uint8_t         sense_sz = 0;
1262         srb_t           *sp = ha->status_srb;
1263         struct scsi_cmnd *cp;
1264
1265         if (sp != NULL && sp->request_sense_length != 0) {
1266                 cp = sp->cmd;
1267                 if (cp == NULL) {
1268                         DEBUG2(printk("%s(): Cmd already returned back to OS "
1269                             "sp=%p.\n", __func__, sp));
1270                         qla_printk(KERN_INFO, ha,
1271                             "cmd is NULL: already returned to OS (sp=%p)\n",
1272                             sp);
1273
1274                         ha->status_srb = NULL;
1275                         return;
1276                 }
1277
1278                 if (sp->request_sense_length > sizeof(pkt->data)) {
1279                         sense_sz = sizeof(pkt->data);
1280                 } else {
1281                         sense_sz = sp->request_sense_length;
1282                 }
1283
1284                 /* Move sense data. */
1285                 if (IS_FWI2_CAPABLE(ha))
1286                         host_to_fcp_swap(pkt->data, sizeof(pkt->data));
1287                 memcpy(sp->request_sense_ptr, pkt->data, sense_sz);
1288                 DEBUG5(qla2x00_dump_buffer(sp->request_sense_ptr, sense_sz));
1289
1290                 sp->request_sense_ptr += sense_sz;
1291                 sp->request_sense_length -= sense_sz;
1292
1293                 /* Place command on done queue. */
1294                 if (sp->request_sense_length == 0) {
1295                         ha->status_srb = NULL;
1296                         qla2x00_sp_compl(ha, sp);
1297                 }
1298         }
1299 }
1300
1301 /**
1302  * qla2x00_error_entry() - Process an error entry.
1303  * @ha: SCSI driver HA context
1304  * @pkt: Entry pointer
1305  */
1306 static void
1307 qla2x00_error_entry(scsi_qla_host_t *ha, sts_entry_t *pkt)
1308 {
1309         srb_t *sp;
1310
1311 #if defined(QL_DEBUG_LEVEL_2)
1312         if (pkt->entry_status & RF_INV_E_ORDER)
1313                 qla_printk(KERN_ERR, ha, "%s: Invalid Entry Order\n", __func__);
1314         else if (pkt->entry_status & RF_INV_E_COUNT)
1315                 qla_printk(KERN_ERR, ha, "%s: Invalid Entry Count\n", __func__);
1316         else if (pkt->entry_status & RF_INV_E_PARAM)
1317                 qla_printk(KERN_ERR, ha,
1318                     "%s: Invalid Entry Parameter\n", __func__);
1319         else if (pkt->entry_status & RF_INV_E_TYPE)
1320                 qla_printk(KERN_ERR, ha, "%s: Invalid Entry Type\n", __func__);
1321         else if (pkt->entry_status & RF_BUSY)
1322                 qla_printk(KERN_ERR, ha, "%s: Busy\n", __func__);
1323         else
1324                 qla_printk(KERN_ERR, ha, "%s: UNKNOWN flag error\n", __func__);
1325 #endif
1326
1327         /* Validate handle. */
1328         if (pkt->handle < MAX_OUTSTANDING_COMMANDS)
1329                 sp = ha->outstanding_cmds[pkt->handle];
1330         else
1331                 sp = NULL;
1332
1333         if (sp) {
1334                 /* Free outstanding command slot. */
1335                 ha->outstanding_cmds[pkt->handle] = NULL;
1336
1337                 /* Bad payload or header */
1338                 if (pkt->entry_status &
1339                     (RF_INV_E_ORDER | RF_INV_E_COUNT |
1340                      RF_INV_E_PARAM | RF_INV_E_TYPE)) {
1341                         sp->cmd->result = DID_ERROR << 16;
1342                 } else if (pkt->entry_status & RF_BUSY) {
1343                         sp->cmd->result = DID_BUS_BUSY << 16;
1344                 } else {
1345                         sp->cmd->result = DID_ERROR << 16;
1346                 }
1347                 qla2x00_sp_compl(ha, sp);
1348
1349         } else if (pkt->entry_type == COMMAND_A64_TYPE || pkt->entry_type ==
1350             COMMAND_TYPE || pkt->entry_type == COMMAND_TYPE_7) {
1351                 DEBUG2(printk("scsi(%ld): Error entry - invalid handle\n",
1352                     ha->host_no));
1353                 qla_printk(KERN_WARNING, ha,
1354                     "Error entry - invalid handle\n");
1355
1356                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
1357                 qla2xxx_wake_dpc(ha);
1358         }
1359 }
1360
1361 /**
1362  * qla24xx_mbx_completion() - Process mailbox command completions.
1363  * @ha: SCSI driver HA context
1364  * @mb0: Mailbox0 register
1365  */
1366 static void
1367 qla24xx_mbx_completion(scsi_qla_host_t *ha, uint16_t mb0)
1368 {
1369         uint16_t        cnt;
1370         uint16_t __iomem *wptr;
1371         struct device_reg_24xx __iomem *reg = &ha->iobase->isp24;
1372
1373         /* Load return mailbox registers. */
1374         ha->flags.mbox_int = 1;
1375         ha->mailbox_out[0] = mb0;
1376         wptr = (uint16_t __iomem *)&reg->mailbox1;
1377
1378         for (cnt = 1; cnt < ha->mbx_count; cnt++) {
1379                 ha->mailbox_out[cnt] = RD_REG_WORD(wptr);
1380                 wptr++;
1381         }
1382
1383         if (ha->mcp) {
1384                 DEBUG3(printk("%s(%ld): Got mailbox completion. cmd=%x.\n",
1385                     __func__, ha->host_no, ha->mcp->mb[0]));
1386         } else {
1387                 DEBUG2_3(printk("%s(%ld): MBX pointer ERROR!\n",
1388                     __func__, ha->host_no));
1389         }
1390 }
1391
1392 /**
1393  * qla24xx_process_response_queue() - Process response queue entries.
1394  * @ha: SCSI driver HA context
1395  */
1396 void
1397 qla24xx_process_response_queue(struct scsi_qla_host *ha)
1398 {
1399         struct device_reg_24xx __iomem *reg = &ha->iobase->isp24;
1400         struct sts_entry_24xx *pkt;
1401
1402         if (!ha->flags.online)
1403                 return;
1404
1405         while (ha->response_ring_ptr->signature != RESPONSE_PROCESSED) {
1406                 pkt = (struct sts_entry_24xx *)ha->response_ring_ptr;
1407
1408                 ha->rsp_ring_index++;
1409                 if (ha->rsp_ring_index == ha->response_q_length) {
1410                         ha->rsp_ring_index = 0;
1411                         ha->response_ring_ptr = ha->response_ring;
1412                 } else {
1413                         ha->response_ring_ptr++;
1414                 }
1415
1416                 if (pkt->entry_status != 0) {
1417                         DEBUG3(printk(KERN_INFO
1418                             "scsi(%ld): Process error entry.\n", ha->host_no));
1419
1420                         qla2x00_error_entry(ha, (sts_entry_t *) pkt);
1421                         ((response_t *)pkt)->signature = RESPONSE_PROCESSED;
1422                         wmb();
1423                         continue;
1424                 }
1425
1426                 switch (pkt->entry_type) {
1427                 case STATUS_TYPE:
1428                         qla2x00_status_entry(ha, pkt);
1429                         break;
1430                 case STATUS_CONT_TYPE:
1431                         qla2x00_status_cont_entry(ha, (sts_cont_entry_t *)pkt);
1432                         break;
1433                 case VP_RPT_ID_IOCB_TYPE:
1434                         qla24xx_report_id_acquisition(ha,
1435                             (struct vp_rpt_id_entry_24xx *)pkt);
1436                         break;
1437                 default:
1438                         /* Type Not Supported. */
1439                         DEBUG4(printk(KERN_WARNING
1440                             "scsi(%ld): Received unknown response pkt type %x "
1441                             "entry status=%x.\n",
1442                             ha->host_no, pkt->entry_type, pkt->entry_status));
1443                         break;
1444                 }
1445                 ((response_t *)pkt)->signature = RESPONSE_PROCESSED;
1446                 wmb();
1447         }
1448
1449         /* Adjust ring index */
1450         WRT_REG_DWORD(&reg->rsp_q_out, ha->rsp_ring_index);
1451 }
1452
1453 static void
1454 qla2xxx_check_risc_status(scsi_qla_host_t *ha)
1455 {
1456         int rval;
1457         uint32_t cnt;
1458         struct device_reg_24xx __iomem *reg = &ha->iobase->isp24;
1459
1460         if (!IS_QLA25XX(ha))
1461                 return;
1462
1463         rval = QLA_SUCCESS;
1464         WRT_REG_DWORD(&reg->iobase_addr, 0x7C00);
1465         RD_REG_DWORD(&reg->iobase_addr);
1466         WRT_REG_DWORD(&reg->iobase_window, 0x0001);
1467         for (cnt = 10000; (RD_REG_DWORD(&reg->iobase_window) & BIT_0) == 0 &&
1468             rval == QLA_SUCCESS; cnt--) {
1469                 if (cnt) {
1470                         WRT_REG_DWORD(&reg->iobase_window, 0x0001);
1471                         udelay(10);
1472                 } else
1473                         rval = QLA_FUNCTION_TIMEOUT;
1474         }
1475         if (rval == QLA_SUCCESS)
1476                 goto next_test;
1477
1478         WRT_REG_DWORD(&reg->iobase_window, 0x0003);
1479         for (cnt = 100; (RD_REG_DWORD(&reg->iobase_window) & BIT_0) == 0 &&
1480             rval == QLA_SUCCESS; cnt--) {
1481                 if (cnt) {
1482                         WRT_REG_DWORD(&reg->iobase_window, 0x0003);
1483                         udelay(10);
1484                 } else
1485                         rval = QLA_FUNCTION_TIMEOUT;
1486         }
1487         if (rval != QLA_SUCCESS)
1488                 goto done;
1489
1490 next_test:
1491         if (RD_REG_DWORD(&reg->iobase_c8) & BIT_3)
1492                 qla_printk(KERN_INFO, ha, "Additional code -- 0x55AA.\n");
1493
1494 done:
1495         WRT_REG_DWORD(&reg->iobase_window, 0x0000);
1496         RD_REG_DWORD(&reg->iobase_window);
1497 }
1498
1499 /**
1500  * qla24xx_intr_handler() - Process interrupts for the ISP23xx and ISP63xx.
1501  * @irq:
1502  * @dev_id: SCSI driver HA context
1503  *
1504  * Called by system whenever the host adapter generates an interrupt.
1505  *
1506  * Returns handled flag.
1507  */
1508 irqreturn_t
1509 qla24xx_intr_handler(int irq, void *dev_id)
1510 {
1511         scsi_qla_host_t *ha;
1512         struct device_reg_24xx __iomem *reg;
1513         int             status;
1514         unsigned long   iter;
1515         uint32_t        stat;
1516         uint32_t        hccr;
1517         uint16_t        mb[4];
1518
1519         ha = (scsi_qla_host_t *) dev_id;
1520         if (!ha) {
1521                 printk(KERN_INFO
1522                     "%s(): NULL host pointer\n", __func__);
1523                 return IRQ_NONE;
1524         }
1525
1526         reg = &ha->iobase->isp24;
1527         status = 0;
1528
1529         spin_lock(&ha->hardware_lock);
1530         for (iter = 50; iter--; ) {
1531                 stat = RD_REG_DWORD(&reg->host_status);
1532                 if (stat & HSRX_RISC_PAUSED) {
1533                         if (pci_channel_offline(ha->pdev))
1534                                 break;
1535
1536                         if (ha->hw_event_pause_errors == 0)
1537                                 qla2x00_post_hwe_work(ha, HW_EVENT_PARITY_ERR,
1538                                     0, MSW(stat), LSW(stat));
1539                         else if (ha->hw_event_pause_errors < 0xffffffff)
1540                                 ha->hw_event_pause_errors++;
1541
1542                         hccr = RD_REG_DWORD(&reg->hccr);
1543
1544                         qla_printk(KERN_INFO, ha, "RISC paused -- HCCR=%x, "
1545                             "Dumping firmware!\n", hccr);
1546
1547                         qla2xxx_check_risc_status(ha);
1548
1549                         ha->isp_ops->fw_dump(ha, 1);
1550                         set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
1551                         break;
1552                 } else if ((stat & HSRX_RISC_INT) == 0)
1553                         break;
1554
1555                 switch (stat & 0xff) {
1556                 case 0x1:
1557                 case 0x2:
1558                 case 0x10:
1559                 case 0x11:
1560                         qla24xx_mbx_completion(ha, MSW(stat));
1561                         status |= MBX_INTERRUPT;
1562
1563                         break;
1564                 case 0x12:
1565                         mb[0] = MSW(stat);
1566                         mb[1] = RD_REG_WORD(&reg->mailbox1);
1567                         mb[2] = RD_REG_WORD(&reg->mailbox2);
1568                         mb[3] = RD_REG_WORD(&reg->mailbox3);
1569                         qla2x00_async_event(ha, mb);
1570                         break;
1571                 case 0x13:
1572                         qla24xx_process_response_queue(ha);
1573                         break;
1574                 default:
1575                         DEBUG2(printk("scsi(%ld): Unrecognized interrupt type "
1576                             "(%d).\n",
1577                             ha->host_no, stat & 0xff));
1578                         break;
1579                 }
1580                 WRT_REG_DWORD(&reg->hccr, HCCRX_CLR_RISC_INT);
1581                 RD_REG_DWORD_RELAXED(&reg->hccr);
1582         }
1583         spin_unlock(&ha->hardware_lock);
1584
1585         if (test_bit(MBX_INTR_WAIT, &ha->mbx_cmd_flags) &&
1586             (status & MBX_INTERRUPT) && ha->flags.mbox_int) {
1587                 set_bit(MBX_INTERRUPT, &ha->mbx_cmd_flags);
1588                 complete(&ha->mbx_intr_comp);
1589         }
1590
1591         return IRQ_HANDLED;
1592 }
1593
1594 static irqreturn_t
1595 qla24xx_msix_rsp_q(int irq, void *dev_id)
1596 {
1597         scsi_qla_host_t *ha;
1598         struct device_reg_24xx __iomem *reg;
1599
1600         ha = dev_id;
1601         reg = &ha->iobase->isp24;
1602
1603         spin_lock_irq(&ha->hardware_lock);
1604
1605         qla24xx_process_response_queue(ha);
1606         WRT_REG_DWORD(&reg->hccr, HCCRX_CLR_RISC_INT);
1607
1608         spin_unlock_irq(&ha->hardware_lock);
1609
1610         return IRQ_HANDLED;
1611 }
1612
1613 static irqreturn_t
1614 qla24xx_msix_default(int irq, void *dev_id)
1615 {
1616         scsi_qla_host_t *ha;
1617         struct device_reg_24xx __iomem *reg;
1618         int             status;
1619         uint32_t        stat;
1620         uint32_t        hccr;
1621         uint16_t        mb[4];
1622
1623         ha = dev_id;
1624         reg = &ha->iobase->isp24;
1625         status = 0;
1626
1627         spin_lock_irq(&ha->hardware_lock);
1628         do {
1629                 stat = RD_REG_DWORD(&reg->host_status);
1630                 if (stat & HSRX_RISC_PAUSED) {
1631                         if (pci_channel_offline(ha->pdev))
1632                                 break;
1633
1634                         if (ha->hw_event_pause_errors == 0)
1635                                 qla2x00_post_hwe_work(ha, HW_EVENT_PARITY_ERR,
1636                                     0, MSW(stat), LSW(stat));
1637                         else if (ha->hw_event_pause_errors < 0xffffffff)
1638                                 ha->hw_event_pause_errors++;
1639
1640                         hccr = RD_REG_DWORD(&reg->hccr);
1641
1642                         qla_printk(KERN_INFO, ha, "RISC paused -- HCCR=%x, "
1643                             "Dumping firmware!\n", hccr);
1644
1645                         qla2xxx_check_risc_status(ha);
1646
1647                         ha->isp_ops->fw_dump(ha, 1);
1648                         set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
1649                         break;
1650                 } else if ((stat & HSRX_RISC_INT) == 0)
1651                         break;
1652
1653                 switch (stat & 0xff) {
1654                 case 0x1:
1655                 case 0x2:
1656                 case 0x10:
1657                 case 0x11:
1658                         qla24xx_mbx_completion(ha, MSW(stat));
1659                         status |= MBX_INTERRUPT;
1660
1661                         break;
1662                 case 0x12:
1663                         mb[0] = MSW(stat);
1664                         mb[1] = RD_REG_WORD(&reg->mailbox1);
1665                         mb[2] = RD_REG_WORD(&reg->mailbox2);
1666                         mb[3] = RD_REG_WORD(&reg->mailbox3);
1667                         qla2x00_async_event(ha, mb);
1668                         break;
1669                 case 0x13:
1670                         qla24xx_process_response_queue(ha);
1671                         break;
1672                 default:
1673                         DEBUG2(printk("scsi(%ld): Unrecognized interrupt type "
1674                             "(%d).\n",
1675                             ha->host_no, stat & 0xff));
1676                         break;
1677                 }
1678                 WRT_REG_DWORD(&reg->hccr, HCCRX_CLR_RISC_INT);
1679         } while (0);
1680         spin_unlock_irq(&ha->hardware_lock);
1681
1682         if (test_bit(MBX_INTR_WAIT, &ha->mbx_cmd_flags) &&
1683             (status & MBX_INTERRUPT) && ha->flags.mbox_int) {
1684                 set_bit(MBX_INTERRUPT, &ha->mbx_cmd_flags);
1685                 complete(&ha->mbx_intr_comp);
1686         }
1687
1688         return IRQ_HANDLED;
1689 }
1690
1691 /* Interrupt handling helpers. */
1692
1693 struct qla_init_msix_entry {
1694         uint16_t entry;
1695         uint16_t index;
1696         const char *name;
1697         irq_handler_t handler;
1698 };
1699
1700 static struct qla_init_msix_entry imsix_entries[QLA_MSIX_ENTRIES] = {
1701         { QLA_MSIX_DEFAULT, QLA_MIDX_DEFAULT,
1702                 "qla2xxx (default)", qla24xx_msix_default },
1703
1704         { QLA_MSIX_RSP_Q, QLA_MIDX_RSP_Q,
1705                 "qla2xxx (rsp_q)", qla24xx_msix_rsp_q },
1706 };
1707
1708 static void
1709 qla24xx_disable_msix(scsi_qla_host_t *ha)
1710 {
1711         int i;
1712         struct qla_msix_entry *qentry;
1713
1714         for (i = 0; i < QLA_MSIX_ENTRIES; i++) {
1715                 qentry = &ha->msix_entries[imsix_entries[i].index];
1716                 if (qentry->have_irq)
1717                         free_irq(qentry->msix_vector, ha);
1718         }
1719         pci_disable_msix(ha->pdev);
1720 }
1721
1722 static int
1723 qla24xx_enable_msix(scsi_qla_host_t *ha)
1724 {
1725         int i, ret;
1726         struct msix_entry entries[QLA_MSIX_ENTRIES];
1727         struct qla_msix_entry *qentry;
1728
1729         for (i = 0; i < QLA_MSIX_ENTRIES; i++)
1730                 entries[i].entry = imsix_entries[i].entry;
1731
1732         ret = pci_enable_msix(ha->pdev, entries, ARRAY_SIZE(entries));
1733         if (ret) {
1734                 qla_printk(KERN_WARNING, ha,
1735                     "MSI-X: Failed to enable support -- %d/%d\n",
1736                     QLA_MSIX_ENTRIES, ret);
1737                 goto msix_out;
1738         }
1739         ha->flags.msix_enabled = 1;
1740
1741         for (i = 0; i < QLA_MSIX_ENTRIES; i++) {
1742                 qentry = &ha->msix_entries[imsix_entries[i].index];
1743                 qentry->msix_vector = entries[i].vector;
1744                 qentry->msix_entry = entries[i].entry;
1745                 qentry->have_irq = 0;
1746                 ret = request_irq(qentry->msix_vector,
1747                     imsix_entries[i].handler, 0, imsix_entries[i].name, ha);
1748                 if (ret) {
1749                         qla_printk(KERN_WARNING, ha,
1750                             "MSI-X: Unable to register handler -- %x/%d.\n",
1751                             imsix_entries[i].index, ret);
1752                         qla24xx_disable_msix(ha);
1753                         goto msix_out;
1754                 }
1755                 qentry->have_irq = 1;
1756         }
1757
1758 msix_out:
1759         return ret;
1760 }
1761
1762 int
1763 qla2x00_request_irqs(scsi_qla_host_t *ha)
1764 {
1765         int ret;
1766         device_reg_t __iomem *reg = ha->iobase;
1767
1768         /* If possible, enable MSI-X. */
1769         if (!IS_QLA2432(ha) && !IS_QLA2532(ha) && !IS_QLA8432(ha))
1770                 goto skip_msix;
1771
1772         if (IS_QLA2432(ha) && (ha->chip_revision < QLA_MSIX_CHIP_REV_24XX ||
1773             !QLA_MSIX_FW_MODE_1(ha->fw_attributes))) {
1774                 DEBUG2(qla_printk(KERN_WARNING, ha,
1775                     "MSI-X: Unsupported ISP2432 (0x%X, 0x%X).\n",
1776                     ha->chip_revision, ha->fw_attributes));
1777
1778                 goto skip_msix;
1779         }
1780
1781         if (ha->pdev->subsystem_vendor == PCI_VENDOR_ID_HP &&
1782             (ha->pdev->subsystem_device == 0x7040 ||
1783                 ha->pdev->subsystem_device == 0x7041 ||
1784                 ha->pdev->subsystem_device == 0x1705)) {
1785                 DEBUG2(qla_printk(KERN_WARNING, ha,
1786                     "MSI-X: Unsupported ISP2432 SSVID/SSDID (0x%X, 0x%X).\n",
1787                     ha->pdev->subsystem_vendor,
1788                     ha->pdev->subsystem_device));
1789
1790                 goto skip_msi;
1791         }
1792
1793         ret = qla24xx_enable_msix(ha);
1794         if (!ret) {
1795                 DEBUG2(qla_printk(KERN_INFO, ha,
1796                     "MSI-X: Enabled (0x%X, 0x%X).\n", ha->chip_revision,
1797                     ha->fw_attributes));
1798                 goto clear_risc_ints;
1799         }
1800         qla_printk(KERN_WARNING, ha,
1801             "MSI-X: Falling back-to INTa mode -- %d.\n", ret);
1802 skip_msix:
1803
1804         if (!IS_QLA24XX(ha) && !IS_QLA2532(ha) && !IS_QLA8432(ha))
1805                 goto skip_msi;
1806
1807         ret = pci_enable_msi(ha->pdev);
1808         if (!ret) {
1809                 DEBUG2(qla_printk(KERN_INFO, ha, "MSI: Enabled.\n"));
1810                 ha->flags.msi_enabled = 1;
1811         }
1812 skip_msi:
1813
1814         ret = request_irq(ha->pdev->irq, ha->isp_ops->intr_handler,
1815             IRQF_DISABLED|IRQF_SHARED, QLA2XXX_DRIVER_NAME, ha);
1816         if (ret) {
1817                 qla_printk(KERN_WARNING, ha,
1818                     "Failed to reserve interrupt %d already in use.\n",
1819                     ha->pdev->irq);
1820                 goto fail;
1821         }
1822         ha->flags.inta_enabled = 1;
1823         ha->host->irq = ha->pdev->irq;
1824 clear_risc_ints:
1825
1826         ha->isp_ops->disable_intrs(ha);
1827         spin_lock_irq(&ha->hardware_lock);
1828         if (IS_FWI2_CAPABLE(ha)) {
1829                 WRT_REG_DWORD(&reg->isp24.hccr, HCCRX_CLR_HOST_INT);
1830                 WRT_REG_DWORD(&reg->isp24.hccr, HCCRX_CLR_RISC_INT);
1831         } else {
1832                 WRT_REG_WORD(&reg->isp.semaphore, 0);
1833                 WRT_REG_WORD(&reg->isp.hccr, HCCR_CLR_RISC_INT);
1834                 WRT_REG_WORD(&reg->isp.hccr, HCCR_CLR_HOST_INT);
1835         }
1836         spin_unlock_irq(&ha->hardware_lock);
1837
1838 fail:
1839         return ret;
1840 }
1841
1842 void
1843 qla2x00_free_irqs(scsi_qla_host_t *ha)
1844 {
1845
1846         if (ha->flags.msix_enabled)
1847                 qla24xx_disable_msix(ha);
1848         else if (ha->flags.inta_enabled) {
1849                 free_irq(ha->host->irq, ha);
1850                 pci_disable_msi(ha->pdev);
1851         }
1852 }