Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rric/oprofile
[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 occurred (%x).\n", ha->host_no,
395                     mb[1]));
396                 qla_printk(KERN_INFO, ha, "LIP occurred (%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 occurred (%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 (received LIP_OCCURRED/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] & 0xff) << 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                 /* Ignore reserved bits from RSCN-payload. */
604                 rscn_entry = ((mb[1] & 0x3ff) << 16) | mb[2];
605                 rscn_queue_index = ha->rscn_in_ptr + 1;
606                 if (rscn_queue_index == MAX_RSCN_COUNT)
607                         rscn_queue_index = 0;
608                 if (rscn_queue_index != ha->rscn_out_ptr) {
609                         ha->rscn_queue[ha->rscn_in_ptr] = rscn_entry;
610                         ha->rscn_in_ptr = rscn_queue_index;
611                 } else {
612                         ha->flags.rscn_queue_overflow = 1;
613                 }
614
615                 atomic_set(&ha->loop_state, LOOP_UPDATE);
616                 atomic_set(&ha->loop_down_timer, 0);
617                 ha->flags.management_server_logged_in = 0;
618
619                 set_bit(LOOP_RESYNC_NEEDED, &ha->dpc_flags);
620                 set_bit(RSCN_UPDATE, &ha->dpc_flags);
621                 qla2x00_post_aen_work(ha, FCH_EVT_RSCN, rscn_entry);
622                 break;
623
624         /* case MBA_RIO_RESPONSE: */
625         case MBA_ZIO_RESPONSE:
626                 DEBUG2(printk("scsi(%ld): [R|Z]IO update completion.\n",
627                     ha->host_no));
628                 DEBUG(printk(KERN_INFO
629                     "scsi(%ld): [R|Z]IO update completion.\n",
630                     ha->host_no));
631
632                 if (IS_FWI2_CAPABLE(ha))
633                         qla24xx_process_response_queue(ha);
634                 else
635                         qla2x00_process_response_queue(ha);
636                 break;
637
638         case MBA_DISCARD_RND_FRAME:
639                 DEBUG2(printk("scsi(%ld): Discard RND Frame -- %04x %04x "
640                     "%04x.\n", ha->host_no, mb[1], mb[2], mb[3]));
641                 break;
642
643         case MBA_TRACE_NOTIFICATION:
644                 DEBUG2(printk("scsi(%ld): Trace Notification -- %04x %04x.\n",
645                 ha->host_no, mb[1], mb[2]));
646                 break;
647
648         case MBA_ISP84XX_ALERT:
649                 DEBUG2(printk("scsi(%ld): ISP84XX Alert Notification -- "
650                     "%04x %04x %04x\n", ha->host_no, mb[1], mb[2], mb[3]));
651
652                 spin_lock_irqsave(&ha->cs84xx->access_lock, flags);
653                 switch (mb[1]) {
654                 case A84_PANIC_RECOVERY:
655                         qla_printk(KERN_INFO, ha, "Alert 84XX: panic recovery "
656                             "%04x %04x\n", mb[2], mb[3]);
657                         break;
658                 case A84_OP_LOGIN_COMPLETE:
659                         ha->cs84xx->op_fw_version = mb[3] << 16 | mb[2];
660                         DEBUG2(qla_printk(KERN_INFO, ha, "Alert 84XX:"
661                             "firmware version %x\n", ha->cs84xx->op_fw_version));
662                         break;
663                 case A84_DIAG_LOGIN_COMPLETE:
664                         ha->cs84xx->diag_fw_version = mb[3] << 16 | mb[2];
665                         DEBUG2(qla_printk(KERN_INFO, ha, "Alert 84XX:"
666                             "diagnostic firmware version %x\n",
667                             ha->cs84xx->diag_fw_version));
668                         break;
669                 case A84_GOLD_LOGIN_COMPLETE:
670                         ha->cs84xx->diag_fw_version = mb[3] << 16 | mb[2];
671                         ha->cs84xx->fw_update = 1;
672                         DEBUG2(qla_printk(KERN_INFO, ha, "Alert 84XX: gold "
673                             "firmware version %x\n",
674                             ha->cs84xx->gold_fw_version));
675                         break;
676                 default:
677                         qla_printk(KERN_ERR, ha,
678                             "Alert 84xx: Invalid Alert %04x %04x %04x\n",
679                             mb[1], mb[2], mb[3]);
680                 }
681                 spin_unlock_irqrestore(&ha->cs84xx->access_lock, flags);
682                 break;
683         }
684
685         if (!ha->parent && ha->num_vhosts)
686                 qla2x00_alert_all_vps(ha, mb);
687 }
688
689 static void
690 qla2x00_adjust_sdev_qdepth_up(struct scsi_device *sdev, void *data)
691 {
692         fc_port_t *fcport = data;
693
694         if (fcport->ha->max_q_depth <= sdev->queue_depth)
695                 return;
696
697         if (sdev->ordered_tags)
698                 scsi_adjust_queue_depth(sdev, MSG_ORDERED_TAG,
699                     sdev->queue_depth + 1);
700         else
701                 scsi_adjust_queue_depth(sdev, MSG_SIMPLE_TAG,
702                     sdev->queue_depth + 1);
703
704         fcport->last_ramp_up = jiffies;
705
706         DEBUG2(qla_printk(KERN_INFO, fcport->ha,
707             "scsi(%ld:%d:%d:%d): Queue depth adjusted-up to %d.\n",
708             fcport->ha->host_no, sdev->channel, sdev->id, sdev->lun,
709             sdev->queue_depth));
710 }
711
712 static void
713 qla2x00_adjust_sdev_qdepth_down(struct scsi_device *sdev, void *data)
714 {
715         fc_port_t *fcport = data;
716
717         if (!scsi_track_queue_full(sdev, sdev->queue_depth - 1))
718                 return;
719
720         DEBUG2(qla_printk(KERN_INFO, fcport->ha,
721             "scsi(%ld:%d:%d:%d): Queue depth adjusted-down to %d.\n",
722             fcport->ha->host_no, sdev->channel, sdev->id, sdev->lun,
723             sdev->queue_depth));
724 }
725
726 static inline void
727 qla2x00_ramp_up_queue_depth(scsi_qla_host_t *ha, srb_t *sp)
728 {
729         fc_port_t *fcport;
730         struct scsi_device *sdev;
731
732         sdev = sp->cmd->device;
733         if (sdev->queue_depth >= ha->max_q_depth)
734                 return;
735
736         fcport = sp->fcport;
737         if (time_before(jiffies,
738             fcport->last_ramp_up + ql2xqfullrampup * HZ))
739                 return;
740         if (time_before(jiffies,
741             fcport->last_queue_full + ql2xqfullrampup * HZ))
742                 return;
743
744         starget_for_each_device(sdev->sdev_target, fcport,
745             qla2x00_adjust_sdev_qdepth_up);
746 }
747
748 /**
749  * qla2x00_process_completed_request() - Process a Fast Post response.
750  * @ha: SCSI driver HA context
751  * @index: SRB index
752  */
753 static void
754 qla2x00_process_completed_request(struct scsi_qla_host *ha, uint32_t index)
755 {
756         srb_t *sp;
757
758         /* Validate handle. */
759         if (index >= MAX_OUTSTANDING_COMMANDS) {
760                 DEBUG2(printk("scsi(%ld): Invalid SCSI completion handle %d.\n",
761                     ha->host_no, index));
762                 qla_printk(KERN_WARNING, ha,
763                     "Invalid SCSI completion handle %d.\n", index);
764
765                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
766                 return;
767         }
768
769         sp = ha->outstanding_cmds[index];
770         if (sp) {
771                 /* Free outstanding command slot. */
772                 ha->outstanding_cmds[index] = NULL;
773
774                 CMD_COMPL_STATUS(sp->cmd) = 0L;
775                 CMD_SCSI_STATUS(sp->cmd) = 0L;
776
777                 /* Save ISP completion status */
778                 sp->cmd->result = DID_OK << 16;
779
780                 qla2x00_ramp_up_queue_depth(ha, sp);
781                 qla2x00_sp_compl(ha, sp);
782         } else {
783                 DEBUG2(printk("scsi(%ld): Invalid ISP SCSI completion handle\n",
784                     ha->host_no));
785                 qla_printk(KERN_WARNING, ha,
786                     "Invalid ISP SCSI completion handle\n");
787
788                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
789         }
790 }
791
792 /**
793  * qla2x00_process_response_queue() - Process response queue entries.
794  * @ha: SCSI driver HA context
795  */
796 void
797 qla2x00_process_response_queue(struct scsi_qla_host *ha)
798 {
799         struct device_reg_2xxx __iomem *reg = &ha->iobase->isp;
800         sts_entry_t     *pkt;
801         uint16_t        handle_cnt;
802         uint16_t        cnt;
803
804         if (!ha->flags.online)
805                 return;
806
807         while (ha->response_ring_ptr->signature != RESPONSE_PROCESSED) {
808                 pkt = (sts_entry_t *)ha->response_ring_ptr;
809
810                 ha->rsp_ring_index++;
811                 if (ha->rsp_ring_index == ha->response_q_length) {
812                         ha->rsp_ring_index = 0;
813                         ha->response_ring_ptr = ha->response_ring;
814                 } else {
815                         ha->response_ring_ptr++;
816                 }
817
818                 if (pkt->entry_status != 0) {
819                         DEBUG3(printk(KERN_INFO
820                             "scsi(%ld): Process error entry.\n", ha->host_no));
821
822                         qla2x00_error_entry(ha, pkt);
823                         ((response_t *)pkt)->signature = RESPONSE_PROCESSED;
824                         wmb();
825                         continue;
826                 }
827
828                 switch (pkt->entry_type) {
829                 case STATUS_TYPE:
830                         qla2x00_status_entry(ha, pkt);
831                         break;
832                 case STATUS_TYPE_21:
833                         handle_cnt = ((sts21_entry_t *)pkt)->handle_count;
834                         for (cnt = 0; cnt < handle_cnt; cnt++) {
835                                 qla2x00_process_completed_request(ha,
836                                     ((sts21_entry_t *)pkt)->handle[cnt]);
837                         }
838                         break;
839                 case STATUS_TYPE_22:
840                         handle_cnt = ((sts22_entry_t *)pkt)->handle_count;
841                         for (cnt = 0; cnt < handle_cnt; cnt++) {
842                                 qla2x00_process_completed_request(ha,
843                                     ((sts22_entry_t *)pkt)->handle[cnt]);
844                         }
845                         break;
846                 case STATUS_CONT_TYPE:
847                         qla2x00_status_cont_entry(ha, (sts_cont_entry_t *)pkt);
848                         break;
849                 default:
850                         /* Type Not Supported. */
851                         DEBUG4(printk(KERN_WARNING
852                             "scsi(%ld): Received unknown response pkt type %x "
853                             "entry status=%x.\n",
854                             ha->host_no, pkt->entry_type, pkt->entry_status));
855                         break;
856                 }
857                 ((response_t *)pkt)->signature = RESPONSE_PROCESSED;
858                 wmb();
859         }
860
861         /* Adjust ring index */
862         WRT_REG_WORD(ISP_RSP_Q_OUT(ha, reg), ha->rsp_ring_index);
863 }
864
865 static inline void
866 qla2x00_handle_sense(srb_t *sp, uint8_t *sense_data, uint32_t sense_len)
867 {
868         struct scsi_cmnd *cp = sp->cmd;
869
870         if (sense_len >= SCSI_SENSE_BUFFERSIZE)
871                 sense_len = SCSI_SENSE_BUFFERSIZE;
872
873         CMD_ACTUAL_SNSLEN(cp) = sense_len;
874         sp->request_sense_length = sense_len;
875         sp->request_sense_ptr = cp->sense_buffer;
876         if (sp->request_sense_length > 32)
877                 sense_len = 32;
878
879         memcpy(cp->sense_buffer, sense_data, sense_len);
880
881         sp->request_sense_ptr += sense_len;
882         sp->request_sense_length -= sense_len;
883         if (sp->request_sense_length != 0)
884                 sp->fcport->ha->status_srb = sp;
885
886         DEBUG5(printk("%s(): Check condition Sense data, scsi(%ld:%d:%d:%d) "
887             "cmd=%p pid=%ld\n", __func__, sp->fcport->ha->host_no,
888             cp->device->channel, cp->device->id, cp->device->lun, cp,
889             cp->serial_number));
890         if (sense_len)
891                 DEBUG5(qla2x00_dump_buffer(cp->sense_buffer,
892                     CMD_ACTUAL_SNSLEN(cp)));
893 }
894
895 /**
896  * qla2x00_status_entry() - Process a Status IOCB entry.
897  * @ha: SCSI driver HA context
898  * @pkt: Entry pointer
899  */
900 static void
901 qla2x00_status_entry(scsi_qla_host_t *ha, void *pkt)
902 {
903         srb_t           *sp;
904         fc_port_t       *fcport;
905         struct scsi_cmnd *cp;
906         sts_entry_t *sts;
907         struct sts_entry_24xx *sts24;
908         uint16_t        comp_status;
909         uint16_t        scsi_status;
910         uint8_t         lscsi_status;
911         int32_t         resid;
912         uint32_t        sense_len, rsp_info_len, resid_len, fw_resid_len;
913         uint8_t         *rsp_info, *sense_data;
914
915         sts = (sts_entry_t *) pkt;
916         sts24 = (struct sts_entry_24xx *) pkt;
917         if (IS_FWI2_CAPABLE(ha)) {
918                 comp_status = le16_to_cpu(sts24->comp_status);
919                 scsi_status = le16_to_cpu(sts24->scsi_status) & SS_MASK;
920         } else {
921                 comp_status = le16_to_cpu(sts->comp_status);
922                 scsi_status = le16_to_cpu(sts->scsi_status) & SS_MASK;
923         }
924
925         /* Fast path completion. */
926         if (comp_status == CS_COMPLETE && scsi_status == 0) {
927                 qla2x00_process_completed_request(ha, sts->handle);
928
929                 return;
930         }
931
932         /* Validate handle. */
933         if (sts->handle < MAX_OUTSTANDING_COMMANDS) {
934                 sp = ha->outstanding_cmds[sts->handle];
935                 ha->outstanding_cmds[sts->handle] = NULL;
936         } else
937                 sp = NULL;
938
939         if (sp == NULL) {
940                 DEBUG2(printk("scsi(%ld): Status Entry invalid handle.\n",
941                     ha->host_no));
942                 qla_printk(KERN_WARNING, ha, "Status Entry invalid handle.\n");
943
944                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
945                 qla2xxx_wake_dpc(ha);
946                 return;
947         }
948         cp = sp->cmd;
949         if (cp == NULL) {
950                 DEBUG2(printk("scsi(%ld): Command already returned back to OS "
951                     "pkt->handle=%d sp=%p.\n", ha->host_no, sts->handle, sp));
952                 qla_printk(KERN_WARNING, ha,
953                     "Command is NULL: already returned to OS (sp=%p)\n", sp);
954
955                 return;
956         }
957
958         lscsi_status = scsi_status & STATUS_MASK;
959         CMD_ENTRY_STATUS(cp) = sts->entry_status;
960         CMD_COMPL_STATUS(cp) = comp_status;
961         CMD_SCSI_STATUS(cp) = scsi_status;
962
963         fcport = sp->fcport;
964
965         sense_len = rsp_info_len = resid_len = fw_resid_len = 0;
966         if (IS_FWI2_CAPABLE(ha)) {
967                 sense_len = le32_to_cpu(sts24->sense_len);
968                 rsp_info_len = le32_to_cpu(sts24->rsp_data_len);
969                 resid_len = le32_to_cpu(sts24->rsp_residual_count);
970                 fw_resid_len = le32_to_cpu(sts24->residual_len);
971                 rsp_info = sts24->data;
972                 sense_data = sts24->data;
973                 host_to_fcp_swap(sts24->data, sizeof(sts24->data));
974         } else {
975                 sense_len = le16_to_cpu(sts->req_sense_length);
976                 rsp_info_len = le16_to_cpu(sts->rsp_info_len);
977                 resid_len = le32_to_cpu(sts->residual_length);
978                 rsp_info = sts->rsp_info;
979                 sense_data = sts->req_sense_data;
980         }
981
982         /* Check for any FCP transport errors. */
983         if (scsi_status & SS_RESPONSE_INFO_LEN_VALID) {
984                 /* Sense data lies beyond any FCP RESPONSE data. */
985                 if (IS_FWI2_CAPABLE(ha))
986                         sense_data += rsp_info_len;
987                 if (rsp_info_len > 3 && rsp_info[3]) {
988                         DEBUG2(printk("scsi(%ld:%d:%d:%d) FCP I/O protocol "
989                             "failure (%x/%02x%02x%02x%02x%02x%02x%02x%02x)..."
990                             "retrying command\n", ha->host_no,
991                             cp->device->channel, cp->device->id,
992                             cp->device->lun, rsp_info_len, rsp_info[0],
993                             rsp_info[1], rsp_info[2], rsp_info[3], rsp_info[4],
994                             rsp_info[5], rsp_info[6], rsp_info[7]));
995
996                         cp->result = DID_BUS_BUSY << 16;
997                         qla2x00_sp_compl(ha, sp);
998                         return;
999                 }
1000         }
1001
1002         /* Check for overrun. */
1003         if (IS_FWI2_CAPABLE(ha) && comp_status == CS_COMPLETE &&
1004             scsi_status & SS_RESIDUAL_OVER)
1005                 comp_status = CS_DATA_OVERRUN;
1006
1007         /*
1008          * Based on Host and scsi status generate status code for Linux
1009          */
1010         switch (comp_status) {
1011         case CS_COMPLETE:
1012         case CS_QUEUE_FULL:
1013                 if (scsi_status == 0) {
1014                         cp->result = DID_OK << 16;
1015                         break;
1016                 }
1017                 if (scsi_status & (SS_RESIDUAL_UNDER | SS_RESIDUAL_OVER)) {
1018                         resid = resid_len;
1019                         scsi_set_resid(cp, resid);
1020                         CMD_RESID_LEN(cp) = resid;
1021
1022                         if (!lscsi_status &&
1023                             ((unsigned)(scsi_bufflen(cp) - resid) <
1024                              cp->underflow)) {
1025                                 qla_printk(KERN_INFO, ha,
1026                                            "scsi(%ld:%d:%d:%d): Mid-layer underflow "
1027                                            "detected (%x of %x bytes)...returning "
1028                                            "error status.\n", ha->host_no,
1029                                            cp->device->channel, cp->device->id,
1030                                            cp->device->lun, resid,
1031                                            scsi_bufflen(cp));
1032
1033                                 cp->result = DID_ERROR << 16;
1034                                 break;
1035                         }
1036                 }
1037                 cp->result = DID_OK << 16 | lscsi_status;
1038
1039                 if (lscsi_status == SAM_STAT_TASK_SET_FULL) {
1040                         DEBUG2(printk(KERN_INFO
1041                             "scsi(%ld): QUEUE FULL status detected "
1042                             "0x%x-0x%x.\n", ha->host_no, comp_status,
1043                             scsi_status));
1044
1045                         /* Adjust queue depth for all luns on the port. */
1046                         fcport->last_queue_full = jiffies;
1047                         starget_for_each_device(cp->device->sdev_target,
1048                             fcport, qla2x00_adjust_sdev_qdepth_down);
1049                         break;
1050                 }
1051                 if (lscsi_status != SS_CHECK_CONDITION)
1052                         break;
1053
1054                 memset(cp->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
1055                 if (!(scsi_status & SS_SENSE_LEN_VALID))
1056                         break;
1057
1058                 qla2x00_handle_sense(sp, sense_data, sense_len);
1059                 break;
1060
1061         case CS_DATA_UNDERRUN:
1062                 resid = resid_len;
1063                 /* Use F/W calculated residual length. */
1064                 if (IS_FWI2_CAPABLE(ha)) {
1065                         if (!(scsi_status & SS_RESIDUAL_UNDER)) {
1066                                 lscsi_status = 0;
1067                         } else if (resid != fw_resid_len) {
1068                                 scsi_status &= ~SS_RESIDUAL_UNDER;
1069                                 lscsi_status = 0;
1070                         }
1071                         resid = fw_resid_len;
1072                 }
1073
1074                 if (scsi_status & SS_RESIDUAL_UNDER) {
1075                         scsi_set_resid(cp, resid);
1076                         CMD_RESID_LEN(cp) = resid;
1077                 } else {
1078                         DEBUG2(printk(KERN_INFO
1079                             "scsi(%ld:%d:%d) UNDERRUN status detected "
1080                             "0x%x-0x%x. resid=0x%x fw_resid=0x%x cdb=0x%x "
1081                             "os_underflow=0x%x\n", ha->host_no,
1082                             cp->device->id, cp->device->lun, comp_status,
1083                             scsi_status, resid_len, resid, cp->cmnd[0],
1084                             cp->underflow));
1085
1086                 }
1087
1088                 /*
1089                  * Check to see if SCSI Status is non zero. If so report SCSI
1090                  * Status.
1091                  */
1092                 if (lscsi_status != 0) {
1093                         cp->result = DID_OK << 16 | lscsi_status;
1094
1095                         if (lscsi_status == SAM_STAT_TASK_SET_FULL) {
1096                                 DEBUG2(printk(KERN_INFO
1097                                     "scsi(%ld): QUEUE FULL status detected "
1098                                     "0x%x-0x%x.\n", ha->host_no, comp_status,
1099                                     scsi_status));
1100
1101                                 /*
1102                                  * Adjust queue depth for all luns on the
1103                                  * port.
1104                                  */
1105                                 fcport->last_queue_full = jiffies;
1106                                 starget_for_each_device(
1107                                     cp->device->sdev_target, fcport,
1108                                     qla2x00_adjust_sdev_qdepth_down);
1109                                 break;
1110                         }
1111                         if (lscsi_status != SS_CHECK_CONDITION)
1112                                 break;
1113
1114                         memset(cp->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE);
1115                         if (!(scsi_status & SS_SENSE_LEN_VALID))
1116                                 break;
1117
1118                         qla2x00_handle_sense(sp, sense_data, sense_len);
1119                 } else {
1120                         /*
1121                          * If RISC reports underrun and target does not report
1122                          * it then we must have a lost frame, so tell upper
1123                          * layer to retry it by reporting a bus busy.
1124                          */
1125                         if (!(scsi_status & SS_RESIDUAL_UNDER)) {
1126                                 DEBUG2(printk("scsi(%ld:%d:%d:%d) Dropped "
1127                                               "frame(s) detected (%x of %x bytes)..."
1128                                               "retrying command.\n", ha->host_no,
1129                                               cp->device->channel, cp->device->id,
1130                                               cp->device->lun, resid,
1131                                               scsi_bufflen(cp)));
1132
1133                                 cp->result = DID_BUS_BUSY << 16;
1134                                 break;
1135                         }
1136
1137                         /* Handle mid-layer underflow */
1138                         if ((unsigned)(scsi_bufflen(cp) - resid) <
1139                             cp->underflow) {
1140                                 qla_printk(KERN_INFO, ha,
1141                                            "scsi(%ld:%d:%d:%d): Mid-layer underflow "
1142                                            "detected (%x of %x bytes)...returning "
1143                                            "error status.\n", ha->host_no,
1144                                            cp->device->channel, cp->device->id,
1145                                            cp->device->lun, resid,
1146                                            scsi_bufflen(cp));
1147
1148                                 cp->result = DID_ERROR << 16;
1149                                 break;
1150                         }
1151
1152                         /* Everybody online, looking good... */
1153                         cp->result = DID_OK << 16;
1154                 }
1155                 break;
1156
1157         case CS_DATA_OVERRUN:
1158                 DEBUG2(printk(KERN_INFO
1159                     "scsi(%ld:%d:%d): OVERRUN status detected 0x%x-0x%x\n",
1160                     ha->host_no, cp->device->id, cp->device->lun, comp_status,
1161                     scsi_status));
1162                 DEBUG2(printk(KERN_INFO
1163                     "CDB: 0x%x 0x%x 0x%x 0x%x 0x%x 0x%x\n",
1164                     cp->cmnd[0], cp->cmnd[1], cp->cmnd[2], cp->cmnd[3],
1165                     cp->cmnd[4], cp->cmnd[5]));
1166                 DEBUG2(printk(KERN_INFO
1167                     "PID=0x%lx req=0x%x xtra=0x%x -- returning DID_ERROR "
1168                     "status!\n",
1169                     cp->serial_number, scsi_bufflen(cp), resid_len));
1170
1171                 cp->result = DID_ERROR << 16;
1172                 break;
1173
1174         case CS_PORT_LOGGED_OUT:
1175         case CS_PORT_CONFIG_CHG:
1176         case CS_PORT_BUSY:
1177         case CS_INCOMPLETE:
1178         case CS_PORT_UNAVAILABLE:
1179                 /*
1180                  * If the port is in Target Down state, return all IOs for this
1181                  * Target with DID_NO_CONNECT ELSE Queue the IOs in the
1182                  * retry_queue.
1183                  */
1184                 DEBUG2(printk("scsi(%ld:%d:%d): status_entry: Port Down "
1185                     "pid=%ld, compl status=0x%x, port state=0x%x\n",
1186                     ha->host_no, cp->device->id, cp->device->lun,
1187                     cp->serial_number, comp_status,
1188                     atomic_read(&fcport->state)));
1189
1190                 /*
1191                  * We are going to have the fc class block the rport
1192                  * while we try to recover so instruct the mid layer
1193                  * to requeue until the class decides how to handle this.
1194                  */
1195                 cp->result = DID_TRANSPORT_DISRUPTED << 16;
1196                 if (atomic_read(&fcport->state) == FCS_ONLINE)
1197                         qla2x00_mark_device_lost(fcport->ha, fcport, 1, 1);
1198                 break;
1199
1200         case CS_RESET:
1201                 DEBUG2(printk(KERN_INFO
1202                     "scsi(%ld): RESET status detected 0x%x-0x%x.\n",
1203                     ha->host_no, comp_status, scsi_status));
1204
1205                 cp->result = DID_RESET << 16;
1206                 break;
1207
1208         case CS_ABORTED:
1209                 /*
1210                  * hv2.19.12 - DID_ABORT does not retry the request if we
1211                  * aborted this request then abort otherwise it must be a
1212                  * reset.
1213                  */
1214                 DEBUG2(printk(KERN_INFO
1215                     "scsi(%ld): ABORT status detected 0x%x-0x%x.\n",
1216                     ha->host_no, comp_status, scsi_status));
1217
1218                 cp->result = DID_RESET << 16;
1219                 break;
1220
1221         case CS_TIMEOUT:
1222                 /*
1223                  * We are going to have the fc class block the rport
1224                  * while we try to recover so instruct the mid layer
1225                  * to requeue until the class decides how to handle this.
1226                  */
1227                 cp->result = DID_TRANSPORT_DISRUPTED << 16;
1228
1229                 if (IS_FWI2_CAPABLE(ha)) {
1230                         DEBUG2(printk(KERN_INFO
1231                             "scsi(%ld:%d:%d:%d): TIMEOUT status detected "
1232                             "0x%x-0x%x\n", ha->host_no, cp->device->channel,
1233                             cp->device->id, cp->device->lun, comp_status,
1234                             scsi_status));
1235                         break;
1236                 }
1237                 DEBUG2(printk(KERN_INFO
1238                     "scsi(%ld:%d:%d:%d): TIMEOUT status detected 0x%x-0x%x "
1239                     "sflags=%x.\n", ha->host_no, cp->device->channel,
1240                     cp->device->id, cp->device->lun, comp_status, scsi_status,
1241                     le16_to_cpu(sts->status_flags)));
1242
1243                 /* Check to see if logout occurred. */
1244                 if ((le16_to_cpu(sts->status_flags) & SF_LOGOUT_SENT))
1245                         qla2x00_mark_device_lost(fcport->ha, fcport, 1, 1);
1246                 break;
1247
1248         default:
1249                 DEBUG3(printk("scsi(%ld): Error detected (unknown status) "
1250                     "0x%x-0x%x.\n", ha->host_no, comp_status, scsi_status));
1251                 qla_printk(KERN_INFO, ha,
1252                     "Unknown status detected 0x%x-0x%x.\n",
1253                     comp_status, scsi_status);
1254
1255                 cp->result = DID_ERROR << 16;
1256                 break;
1257         }
1258
1259         /* Place command on done queue. */
1260         if (ha->status_srb == NULL)
1261                 qla2x00_sp_compl(ha, sp);
1262 }
1263
1264 /**
1265  * qla2x00_status_cont_entry() - Process a Status Continuations entry.
1266  * @ha: SCSI driver HA context
1267  * @pkt: Entry pointer
1268  *
1269  * Extended sense data.
1270  */
1271 static void
1272 qla2x00_status_cont_entry(scsi_qla_host_t *ha, sts_cont_entry_t *pkt)
1273 {
1274         uint8_t         sense_sz = 0;
1275         srb_t           *sp = ha->status_srb;
1276         struct scsi_cmnd *cp;
1277
1278         if (sp != NULL && sp->request_sense_length != 0) {
1279                 cp = sp->cmd;
1280                 if (cp == NULL) {
1281                         DEBUG2(printk("%s(): Cmd already returned back to OS "
1282                             "sp=%p.\n", __func__, sp));
1283                         qla_printk(KERN_INFO, ha,
1284                             "cmd is NULL: already returned to OS (sp=%p)\n",
1285                             sp);
1286
1287                         ha->status_srb = NULL;
1288                         return;
1289                 }
1290
1291                 if (sp->request_sense_length > sizeof(pkt->data)) {
1292                         sense_sz = sizeof(pkt->data);
1293                 } else {
1294                         sense_sz = sp->request_sense_length;
1295                 }
1296
1297                 /* Move sense data. */
1298                 if (IS_FWI2_CAPABLE(ha))
1299                         host_to_fcp_swap(pkt->data, sizeof(pkt->data));
1300                 memcpy(sp->request_sense_ptr, pkt->data, sense_sz);
1301                 DEBUG5(qla2x00_dump_buffer(sp->request_sense_ptr, sense_sz));
1302
1303                 sp->request_sense_ptr += sense_sz;
1304                 sp->request_sense_length -= sense_sz;
1305
1306                 /* Place command on done queue. */
1307                 if (sp->request_sense_length == 0) {
1308                         ha->status_srb = NULL;
1309                         qla2x00_sp_compl(ha, sp);
1310                 }
1311         }
1312 }
1313
1314 /**
1315  * qla2x00_error_entry() - Process an error entry.
1316  * @ha: SCSI driver HA context
1317  * @pkt: Entry pointer
1318  */
1319 static void
1320 qla2x00_error_entry(scsi_qla_host_t *ha, sts_entry_t *pkt)
1321 {
1322         srb_t *sp;
1323
1324 #if defined(QL_DEBUG_LEVEL_2)
1325         if (pkt->entry_status & RF_INV_E_ORDER)
1326                 qla_printk(KERN_ERR, ha, "%s: Invalid Entry Order\n", __func__);
1327         else if (pkt->entry_status & RF_INV_E_COUNT)
1328                 qla_printk(KERN_ERR, ha, "%s: Invalid Entry Count\n", __func__);
1329         else if (pkt->entry_status & RF_INV_E_PARAM)
1330                 qla_printk(KERN_ERR, ha,
1331                     "%s: Invalid Entry Parameter\n", __func__);
1332         else if (pkt->entry_status & RF_INV_E_TYPE)
1333                 qla_printk(KERN_ERR, ha, "%s: Invalid Entry Type\n", __func__);
1334         else if (pkt->entry_status & RF_BUSY)
1335                 qla_printk(KERN_ERR, ha, "%s: Busy\n", __func__);
1336         else
1337                 qla_printk(KERN_ERR, ha, "%s: UNKNOWN flag error\n", __func__);
1338 #endif
1339
1340         /* Validate handle. */
1341         if (pkt->handle < MAX_OUTSTANDING_COMMANDS)
1342                 sp = ha->outstanding_cmds[pkt->handle];
1343         else
1344                 sp = NULL;
1345
1346         if (sp) {
1347                 /* Free outstanding command slot. */
1348                 ha->outstanding_cmds[pkt->handle] = NULL;
1349
1350                 /* Bad payload or header */
1351                 if (pkt->entry_status &
1352                     (RF_INV_E_ORDER | RF_INV_E_COUNT |
1353                      RF_INV_E_PARAM | RF_INV_E_TYPE)) {
1354                         sp->cmd->result = DID_ERROR << 16;
1355                 } else if (pkt->entry_status & RF_BUSY) {
1356                         sp->cmd->result = DID_BUS_BUSY << 16;
1357                 } else {
1358                         sp->cmd->result = DID_ERROR << 16;
1359                 }
1360                 qla2x00_sp_compl(ha, sp);
1361
1362         } else if (pkt->entry_type == COMMAND_A64_TYPE || pkt->entry_type ==
1363             COMMAND_TYPE || pkt->entry_type == COMMAND_TYPE_7) {
1364                 DEBUG2(printk("scsi(%ld): Error entry - invalid handle\n",
1365                     ha->host_no));
1366                 qla_printk(KERN_WARNING, ha,
1367                     "Error entry - invalid handle\n");
1368
1369                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
1370                 qla2xxx_wake_dpc(ha);
1371         }
1372 }
1373
1374 /**
1375  * qla24xx_mbx_completion() - Process mailbox command completions.
1376  * @ha: SCSI driver HA context
1377  * @mb0: Mailbox0 register
1378  */
1379 static void
1380 qla24xx_mbx_completion(scsi_qla_host_t *ha, uint16_t mb0)
1381 {
1382         uint16_t        cnt;
1383         uint16_t __iomem *wptr;
1384         struct device_reg_24xx __iomem *reg = &ha->iobase->isp24;
1385
1386         /* Load return mailbox registers. */
1387         ha->flags.mbox_int = 1;
1388         ha->mailbox_out[0] = mb0;
1389         wptr = (uint16_t __iomem *)&reg->mailbox1;
1390
1391         for (cnt = 1; cnt < ha->mbx_count; cnt++) {
1392                 ha->mailbox_out[cnt] = RD_REG_WORD(wptr);
1393                 wptr++;
1394         }
1395
1396         if (ha->mcp) {
1397                 DEBUG3(printk("%s(%ld): Got mailbox completion. cmd=%x.\n",
1398                     __func__, ha->host_no, ha->mcp->mb[0]));
1399         } else {
1400                 DEBUG2_3(printk("%s(%ld): MBX pointer ERROR!\n",
1401                     __func__, ha->host_no));
1402         }
1403 }
1404
1405 /**
1406  * qla24xx_process_response_queue() - Process response queue entries.
1407  * @ha: SCSI driver HA context
1408  */
1409 void
1410 qla24xx_process_response_queue(struct scsi_qla_host *ha)
1411 {
1412         struct device_reg_24xx __iomem *reg = &ha->iobase->isp24;
1413         struct sts_entry_24xx *pkt;
1414
1415         if (!ha->flags.online)
1416                 return;
1417
1418         while (ha->response_ring_ptr->signature != RESPONSE_PROCESSED) {
1419                 pkt = (struct sts_entry_24xx *)ha->response_ring_ptr;
1420
1421                 ha->rsp_ring_index++;
1422                 if (ha->rsp_ring_index == ha->response_q_length) {
1423                         ha->rsp_ring_index = 0;
1424                         ha->response_ring_ptr = ha->response_ring;
1425                 } else {
1426                         ha->response_ring_ptr++;
1427                 }
1428
1429                 if (pkt->entry_status != 0) {
1430                         DEBUG3(printk(KERN_INFO
1431                             "scsi(%ld): Process error entry.\n", ha->host_no));
1432
1433                         qla2x00_error_entry(ha, (sts_entry_t *) pkt);
1434                         ((response_t *)pkt)->signature = RESPONSE_PROCESSED;
1435                         wmb();
1436                         continue;
1437                 }
1438
1439                 switch (pkt->entry_type) {
1440                 case STATUS_TYPE:
1441                         qla2x00_status_entry(ha, pkt);
1442                         break;
1443                 case STATUS_CONT_TYPE:
1444                         qla2x00_status_cont_entry(ha, (sts_cont_entry_t *)pkt);
1445                         break;
1446                 case VP_RPT_ID_IOCB_TYPE:
1447                         qla24xx_report_id_acquisition(ha,
1448                             (struct vp_rpt_id_entry_24xx *)pkt);
1449                         break;
1450                 default:
1451                         /* Type Not Supported. */
1452                         DEBUG4(printk(KERN_WARNING
1453                             "scsi(%ld): Received unknown response pkt type %x "
1454                             "entry status=%x.\n",
1455                             ha->host_no, pkt->entry_type, pkt->entry_status));
1456                         break;
1457                 }
1458                 ((response_t *)pkt)->signature = RESPONSE_PROCESSED;
1459                 wmb();
1460         }
1461
1462         /* Adjust ring index */
1463         WRT_REG_DWORD(&reg->rsp_q_out, ha->rsp_ring_index);
1464 }
1465
1466 static void
1467 qla2xxx_check_risc_status(scsi_qla_host_t *ha)
1468 {
1469         int rval;
1470         uint32_t cnt;
1471         struct device_reg_24xx __iomem *reg = &ha->iobase->isp24;
1472
1473         if (!IS_QLA25XX(ha))
1474                 return;
1475
1476         rval = QLA_SUCCESS;
1477         WRT_REG_DWORD(&reg->iobase_addr, 0x7C00);
1478         RD_REG_DWORD(&reg->iobase_addr);
1479         WRT_REG_DWORD(&reg->iobase_window, 0x0001);
1480         for (cnt = 10000; (RD_REG_DWORD(&reg->iobase_window) & BIT_0) == 0 &&
1481             rval == QLA_SUCCESS; cnt--) {
1482                 if (cnt) {
1483                         WRT_REG_DWORD(&reg->iobase_window, 0x0001);
1484                         udelay(10);
1485                 } else
1486                         rval = QLA_FUNCTION_TIMEOUT;
1487         }
1488         if (rval == QLA_SUCCESS)
1489                 goto next_test;
1490
1491         WRT_REG_DWORD(&reg->iobase_window, 0x0003);
1492         for (cnt = 100; (RD_REG_DWORD(&reg->iobase_window) & BIT_0) == 0 &&
1493             rval == QLA_SUCCESS; cnt--) {
1494                 if (cnt) {
1495                         WRT_REG_DWORD(&reg->iobase_window, 0x0003);
1496                         udelay(10);
1497                 } else
1498                         rval = QLA_FUNCTION_TIMEOUT;
1499         }
1500         if (rval != QLA_SUCCESS)
1501                 goto done;
1502
1503 next_test:
1504         if (RD_REG_DWORD(&reg->iobase_c8) & BIT_3)
1505                 qla_printk(KERN_INFO, ha, "Additional code -- 0x55AA.\n");
1506
1507 done:
1508         WRT_REG_DWORD(&reg->iobase_window, 0x0000);
1509         RD_REG_DWORD(&reg->iobase_window);
1510 }
1511
1512 /**
1513  * qla24xx_intr_handler() - Process interrupts for the ISP23xx and ISP63xx.
1514  * @irq:
1515  * @dev_id: SCSI driver HA context
1516  *
1517  * Called by system whenever the host adapter generates an interrupt.
1518  *
1519  * Returns handled flag.
1520  */
1521 irqreturn_t
1522 qla24xx_intr_handler(int irq, void *dev_id)
1523 {
1524         scsi_qla_host_t *ha;
1525         struct device_reg_24xx __iomem *reg;
1526         int             status;
1527         unsigned long   iter;
1528         uint32_t        stat;
1529         uint32_t        hccr;
1530         uint16_t        mb[4];
1531
1532         ha = (scsi_qla_host_t *) dev_id;
1533         if (!ha) {
1534                 printk(KERN_INFO
1535                     "%s(): NULL host pointer\n", __func__);
1536                 return IRQ_NONE;
1537         }
1538
1539         reg = &ha->iobase->isp24;
1540         status = 0;
1541
1542         spin_lock(&ha->hardware_lock);
1543         for (iter = 50; iter--; ) {
1544                 stat = RD_REG_DWORD(&reg->host_status);
1545                 if (stat & HSRX_RISC_PAUSED) {
1546                         if (pci_channel_offline(ha->pdev))
1547                                 break;
1548
1549                         if (ha->hw_event_pause_errors == 0)
1550                                 qla2x00_post_hwe_work(ha, HW_EVENT_PARITY_ERR,
1551                                     0, MSW(stat), LSW(stat));
1552                         else if (ha->hw_event_pause_errors < 0xffffffff)
1553                                 ha->hw_event_pause_errors++;
1554
1555                         hccr = RD_REG_DWORD(&reg->hccr);
1556
1557                         qla_printk(KERN_INFO, ha, "RISC paused -- HCCR=%x, "
1558                             "Dumping firmware!\n", hccr);
1559
1560                         qla2xxx_check_risc_status(ha);
1561
1562                         ha->isp_ops->fw_dump(ha, 1);
1563                         set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
1564                         break;
1565                 } else if ((stat & HSRX_RISC_INT) == 0)
1566                         break;
1567
1568                 switch (stat & 0xff) {
1569                 case 0x1:
1570                 case 0x2:
1571                 case 0x10:
1572                 case 0x11:
1573                         qla24xx_mbx_completion(ha, MSW(stat));
1574                         status |= MBX_INTERRUPT;
1575
1576                         break;
1577                 case 0x12:
1578                         mb[0] = MSW(stat);
1579                         mb[1] = RD_REG_WORD(&reg->mailbox1);
1580                         mb[2] = RD_REG_WORD(&reg->mailbox2);
1581                         mb[3] = RD_REG_WORD(&reg->mailbox3);
1582                         qla2x00_async_event(ha, mb);
1583                         break;
1584                 case 0x13:
1585                         qla24xx_process_response_queue(ha);
1586                         break;
1587                 default:
1588                         DEBUG2(printk("scsi(%ld): Unrecognized interrupt type "
1589                             "(%d).\n",
1590                             ha->host_no, stat & 0xff));
1591                         break;
1592                 }
1593                 WRT_REG_DWORD(&reg->hccr, HCCRX_CLR_RISC_INT);
1594                 RD_REG_DWORD_RELAXED(&reg->hccr);
1595         }
1596         spin_unlock(&ha->hardware_lock);
1597
1598         if (test_bit(MBX_INTR_WAIT, &ha->mbx_cmd_flags) &&
1599             (status & MBX_INTERRUPT) && ha->flags.mbox_int) {
1600                 set_bit(MBX_INTERRUPT, &ha->mbx_cmd_flags);
1601                 complete(&ha->mbx_intr_comp);
1602         }
1603
1604         return IRQ_HANDLED;
1605 }
1606
1607 static irqreturn_t
1608 qla24xx_msix_rsp_q(int irq, void *dev_id)
1609 {
1610         scsi_qla_host_t *ha;
1611         struct device_reg_24xx __iomem *reg;
1612
1613         ha = dev_id;
1614         reg = &ha->iobase->isp24;
1615
1616         spin_lock_irq(&ha->hardware_lock);
1617
1618         qla24xx_process_response_queue(ha);
1619         WRT_REG_DWORD(&reg->hccr, HCCRX_CLR_RISC_INT);
1620
1621         spin_unlock_irq(&ha->hardware_lock);
1622
1623         return IRQ_HANDLED;
1624 }
1625
1626 static irqreturn_t
1627 qla24xx_msix_default(int irq, void *dev_id)
1628 {
1629         scsi_qla_host_t *ha;
1630         struct device_reg_24xx __iomem *reg;
1631         int             status;
1632         uint32_t        stat;
1633         uint32_t        hccr;
1634         uint16_t        mb[4];
1635
1636         ha = dev_id;
1637         reg = &ha->iobase->isp24;
1638         status = 0;
1639
1640         spin_lock_irq(&ha->hardware_lock);
1641         do {
1642                 stat = RD_REG_DWORD(&reg->host_status);
1643                 if (stat & HSRX_RISC_PAUSED) {
1644                         if (pci_channel_offline(ha->pdev))
1645                                 break;
1646
1647                         if (ha->hw_event_pause_errors == 0)
1648                                 qla2x00_post_hwe_work(ha, HW_EVENT_PARITY_ERR,
1649                                     0, MSW(stat), LSW(stat));
1650                         else if (ha->hw_event_pause_errors < 0xffffffff)
1651                                 ha->hw_event_pause_errors++;
1652
1653                         hccr = RD_REG_DWORD(&reg->hccr);
1654
1655                         qla_printk(KERN_INFO, ha, "RISC paused -- HCCR=%x, "
1656                             "Dumping firmware!\n", hccr);
1657
1658                         qla2xxx_check_risc_status(ha);
1659
1660                         ha->isp_ops->fw_dump(ha, 1);
1661                         set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
1662                         break;
1663                 } else if ((stat & HSRX_RISC_INT) == 0)
1664                         break;
1665
1666                 switch (stat & 0xff) {
1667                 case 0x1:
1668                 case 0x2:
1669                 case 0x10:
1670                 case 0x11:
1671                         qla24xx_mbx_completion(ha, MSW(stat));
1672                         status |= MBX_INTERRUPT;
1673
1674                         break;
1675                 case 0x12:
1676                         mb[0] = MSW(stat);
1677                         mb[1] = RD_REG_WORD(&reg->mailbox1);
1678                         mb[2] = RD_REG_WORD(&reg->mailbox2);
1679                         mb[3] = RD_REG_WORD(&reg->mailbox3);
1680                         qla2x00_async_event(ha, mb);
1681                         break;
1682                 case 0x13:
1683                         qla24xx_process_response_queue(ha);
1684                         break;
1685                 default:
1686                         DEBUG2(printk("scsi(%ld): Unrecognized interrupt type "
1687                             "(%d).\n",
1688                             ha->host_no, stat & 0xff));
1689                         break;
1690                 }
1691                 WRT_REG_DWORD(&reg->hccr, HCCRX_CLR_RISC_INT);
1692         } while (0);
1693         spin_unlock_irq(&ha->hardware_lock);
1694
1695         if (test_bit(MBX_INTR_WAIT, &ha->mbx_cmd_flags) &&
1696             (status & MBX_INTERRUPT) && ha->flags.mbox_int) {
1697                 set_bit(MBX_INTERRUPT, &ha->mbx_cmd_flags);
1698                 complete(&ha->mbx_intr_comp);
1699         }
1700
1701         return IRQ_HANDLED;
1702 }
1703
1704 /* Interrupt handling helpers. */
1705
1706 struct qla_init_msix_entry {
1707         uint16_t entry;
1708         uint16_t index;
1709         const char *name;
1710         irq_handler_t handler;
1711 };
1712
1713 static struct qla_init_msix_entry imsix_entries[QLA_MSIX_ENTRIES] = {
1714         { QLA_MSIX_DEFAULT, QLA_MIDX_DEFAULT,
1715                 "qla2xxx (default)", qla24xx_msix_default },
1716
1717         { QLA_MSIX_RSP_Q, QLA_MIDX_RSP_Q,
1718                 "qla2xxx (rsp_q)", qla24xx_msix_rsp_q },
1719 };
1720
1721 static void
1722 qla24xx_disable_msix(scsi_qla_host_t *ha)
1723 {
1724         int i;
1725         struct qla_msix_entry *qentry;
1726
1727         for (i = 0; i < QLA_MSIX_ENTRIES; i++) {
1728                 qentry = &ha->msix_entries[imsix_entries[i].index];
1729                 if (qentry->have_irq)
1730                         free_irq(qentry->msix_vector, ha);
1731         }
1732         pci_disable_msix(ha->pdev);
1733 }
1734
1735 static int
1736 qla24xx_enable_msix(scsi_qla_host_t *ha)
1737 {
1738         int i, ret;
1739         struct msix_entry entries[QLA_MSIX_ENTRIES];
1740         struct qla_msix_entry *qentry;
1741
1742         for (i = 0; i < QLA_MSIX_ENTRIES; i++)
1743                 entries[i].entry = imsix_entries[i].entry;
1744
1745         ret = pci_enable_msix(ha->pdev, entries, ARRAY_SIZE(entries));
1746         if (ret) {
1747                 qla_printk(KERN_WARNING, ha,
1748                     "MSI-X: Failed to enable support -- %d/%d\n",
1749                     QLA_MSIX_ENTRIES, ret);
1750                 goto msix_out;
1751         }
1752         ha->flags.msix_enabled = 1;
1753
1754         for (i = 0; i < QLA_MSIX_ENTRIES; i++) {
1755                 qentry = &ha->msix_entries[imsix_entries[i].index];
1756                 qentry->msix_vector = entries[i].vector;
1757                 qentry->msix_entry = entries[i].entry;
1758                 qentry->have_irq = 0;
1759                 ret = request_irq(qentry->msix_vector,
1760                     imsix_entries[i].handler, 0, imsix_entries[i].name, ha);
1761                 if (ret) {
1762                         qla_printk(KERN_WARNING, ha,
1763                             "MSI-X: Unable to register handler -- %x/%d.\n",
1764                             imsix_entries[i].index, ret);
1765                         qla24xx_disable_msix(ha);
1766                         goto msix_out;
1767                 }
1768                 qentry->have_irq = 1;
1769         }
1770
1771 msix_out:
1772         return ret;
1773 }
1774
1775 int
1776 qla2x00_request_irqs(scsi_qla_host_t *ha)
1777 {
1778         int ret;
1779         device_reg_t __iomem *reg = ha->iobase;
1780
1781         /* If possible, enable MSI-X. */
1782         if (!IS_QLA2432(ha) && !IS_QLA2532(ha) && !IS_QLA8432(ha))
1783                 goto skip_msix;
1784
1785         if (IS_QLA2432(ha) && (ha->chip_revision < QLA_MSIX_CHIP_REV_24XX ||
1786             !QLA_MSIX_FW_MODE_1(ha->fw_attributes))) {
1787                 DEBUG2(qla_printk(KERN_WARNING, ha,
1788                     "MSI-X: Unsupported ISP2432 (0x%X, 0x%X).\n",
1789                     ha->chip_revision, ha->fw_attributes));
1790
1791                 goto skip_msix;
1792         }
1793
1794         if (ha->pdev->subsystem_vendor == PCI_VENDOR_ID_HP &&
1795             (ha->pdev->subsystem_device == 0x7040 ||
1796                 ha->pdev->subsystem_device == 0x7041 ||
1797                 ha->pdev->subsystem_device == 0x1705)) {
1798                 DEBUG2(qla_printk(KERN_WARNING, ha,
1799                     "MSI-X: Unsupported ISP2432 SSVID/SSDID (0x%X, 0x%X).\n",
1800                     ha->pdev->subsystem_vendor,
1801                     ha->pdev->subsystem_device));
1802
1803                 goto skip_msi;
1804         }
1805
1806         ret = qla24xx_enable_msix(ha);
1807         if (!ret) {
1808                 DEBUG2(qla_printk(KERN_INFO, ha,
1809                     "MSI-X: Enabled (0x%X, 0x%X).\n", ha->chip_revision,
1810                     ha->fw_attributes));
1811                 goto clear_risc_ints;
1812         }
1813         qla_printk(KERN_WARNING, ha,
1814             "MSI-X: Falling back-to INTa mode -- %d.\n", ret);
1815 skip_msix:
1816
1817         if (!IS_QLA24XX(ha) && !IS_QLA2532(ha) && !IS_QLA8432(ha))
1818                 goto skip_msi;
1819
1820         ret = pci_enable_msi(ha->pdev);
1821         if (!ret) {
1822                 DEBUG2(qla_printk(KERN_INFO, ha, "MSI: Enabled.\n"));
1823                 ha->flags.msi_enabled = 1;
1824         }
1825 skip_msi:
1826
1827         ret = request_irq(ha->pdev->irq, ha->isp_ops->intr_handler,
1828             IRQF_DISABLED|IRQF_SHARED, QLA2XXX_DRIVER_NAME, ha);
1829         if (ret) {
1830                 qla_printk(KERN_WARNING, ha,
1831                     "Failed to reserve interrupt %d already in use.\n",
1832                     ha->pdev->irq);
1833                 goto fail;
1834         }
1835         ha->flags.inta_enabled = 1;
1836         ha->host->irq = ha->pdev->irq;
1837 clear_risc_ints:
1838
1839         ha->isp_ops->disable_intrs(ha);
1840         spin_lock_irq(&ha->hardware_lock);
1841         if (IS_FWI2_CAPABLE(ha)) {
1842                 WRT_REG_DWORD(&reg->isp24.hccr, HCCRX_CLR_HOST_INT);
1843                 WRT_REG_DWORD(&reg->isp24.hccr, HCCRX_CLR_RISC_INT);
1844         } else {
1845                 WRT_REG_WORD(&reg->isp.semaphore, 0);
1846                 WRT_REG_WORD(&reg->isp.hccr, HCCR_CLR_RISC_INT);
1847                 WRT_REG_WORD(&reg->isp.hccr, HCCR_CLR_HOST_INT);
1848         }
1849         spin_unlock_irq(&ha->hardware_lock);
1850
1851 fail:
1852         return ret;
1853 }
1854
1855 void
1856 qla2x00_free_irqs(scsi_qla_host_t *ha)
1857 {
1858
1859         if (ha->flags.msix_enabled)
1860                 qla24xx_disable_msix(ha);
1861         else if (ha->flags.inta_enabled) {
1862                 free_irq(ha->host->irq, ha);
1863                 pci_disable_msi(ha->pdev);
1864         }
1865 }