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Merge branch 'drm-patches' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied...
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / s390 / cio / qdio.c
1 /*
2 *
3 * linux/drivers/s390/cio/qdio.c
4 *
5 * Linux for S/390 QDIO base support, Hipersocket base support
6 * version 2
7 *
8 * Copyright 2000,2002 IBM Corporation
9 * Author(s): Utz Bacher <utz.bacher@de.ibm.com>
10 * 2.6 cio integration by Cornelia Huck <cornelia.huck@de.ibm.com>
11 *
12 * Restriction: only 63 iqdio subchannels would have its own indicator,
13 * after that, subsequent subchannels share one indicator
14 *
15 *
16 *
17 *
18 * This program is free software; you can redistribute it and/or modify
19 * it under the terms of the GNU General Public License as published by
20 * the Free Software Foundation; either version 2, or (at your option)
21 * any later version.
22 *
23 * This program is distributed in the hope that it will be useful,
24 * but WITHOUT ANY WARRANTY; without even the implied warranty of
25 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
26 * GNU General Public License for more details.
27 *
28 * You should have received a copy of the GNU General Public License
29 * along with this program; if not, write to the Free Software
30 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
31 */
32
33 #include <linux/config.h>
34 #include <linux/module.h>
35 #include <linux/init.h>
36
37 #include <linux/slab.h>
38 #include <linux/kernel.h>
39 #include <linux/proc_fs.h>
40 #include <linux/timer.h>
41
42 #include <asm/ccwdev.h>
43 #include <asm/io.h>
44 #include <asm/atomic.h>
45 #include <asm/semaphore.h>
46 #include <asm/timex.h>
47
48 #include <asm/debug.h>
49 #include <asm/qdio.h>
50
51 #include "cio.h"
52 #include "css.h"
53 #include "device.h"
54 #include "airq.h"
55 #include "qdio.h"
56 #include "ioasm.h"
57 #include "chsc.h"
58
59 /****************** MODULE PARAMETER VARIABLES ********************/
60 MODULE_AUTHOR("Utz Bacher <utz.bacher@de.ibm.com>");
61 MODULE_DESCRIPTION("QDIO base support version 2, " \
62 "Copyright 2000 IBM Corporation");
63 MODULE_LICENSE("GPL");
64
65 /******************** HERE WE GO ***********************************/
66
67 static const char version[] = "QDIO base support version 2";
68
69 #ifdef QDIO_PERFORMANCE_STATS
70 static int proc_perf_file_registration;
71 static unsigned long i_p_c, i_p_nc, o_p_c, o_p_nc, ii_p_c, ii_p_nc;
72 static struct qdio_perf_stats perf_stats;
73 #endif /* QDIO_PERFORMANCE_STATS */
74
75 static int hydra_thinints;
76 static int is_passthrough = 0;
77 static int omit_svs;
78
79 static int indicator_used[INDICATORS_PER_CACHELINE];
80 static __u32 * volatile indicators;
81 static __u32 volatile spare_indicator;
82 static atomic_t spare_indicator_usecount;
83
84 static debug_info_t *qdio_dbf_setup;
85 static debug_info_t *qdio_dbf_sbal;
86 static debug_info_t *qdio_dbf_trace;
87 static debug_info_t *qdio_dbf_sense;
88 #ifdef CONFIG_QDIO_DEBUG
89 static debug_info_t *qdio_dbf_slsb_out;
90 static debug_info_t *qdio_dbf_slsb_in;
91 #endif /* CONFIG_QDIO_DEBUG */
92
93 /* iQDIO stuff: */
94 static volatile struct qdio_q *tiq_list=NULL; /* volatile as it could change
95 during a while loop */
96 static DEFINE_SPINLOCK(ttiq_list_lock);
97 static int register_thinint_result;
98 static void tiqdio_tl(unsigned long);
99 static DECLARE_TASKLET(tiqdio_tasklet,tiqdio_tl,0);
100
101 /* not a macro, as one of the arguments is atomic_read */
102 static inline int
103 qdio_min(int a,int b)
104 {
105 if (a<b)
106 return a;
107 else
108 return b;
109 }
110
111 /***************** SCRUBBER HELPER ROUTINES **********************/
112
113 static inline __u64
114 qdio_get_micros(void)
115 {
116 return (get_clock() >> 10); /* time>>12 is microseconds */
117 }
118
119 /*
120 * unfortunately, we can't just xchg the values; in do_QDIO we want to reserve
121 * the q in any case, so that we'll not be interrupted when we are in
122 * qdio_mark_tiq... shouldn't have a really bad impact, as reserving almost
123 * ever works (last famous words)
124 */
125 static inline int
126 qdio_reserve_q(struct qdio_q *q)
127 {
128 return atomic_add_return(1,&q->use_count) - 1;
129 }
130
131 static inline void
132 qdio_release_q(struct qdio_q *q)
133 {
134 atomic_dec(&q->use_count);
135 }
136
137 /*check ccq */
138 static inline int
139 qdio_check_ccq(struct qdio_q *q, unsigned int ccq)
140 {
141 char dbf_text[15];
142
143 if (ccq == 0 || ccq == 32 || ccq == 96)
144 return 0;
145 if (ccq == 97)
146 return 1;
147 /*notify devices immediately*/
148 sprintf(dbf_text,"%d", ccq);
149 QDIO_DBF_TEXT2(1,trace,dbf_text);
150 return -EIO;
151 }
152 /* EQBS: extract buffer states */
153 static inline int
154 qdio_do_eqbs(struct qdio_q *q, unsigned char *state,
155 unsigned int *start, unsigned int *cnt)
156 {
157 struct qdio_irq *irq;
158 unsigned int tmp_cnt, q_no, ccq;
159 int rc ;
160 char dbf_text[15];
161
162 ccq = 0;
163 tmp_cnt = *cnt;
164 irq = (struct qdio_irq*)q->irq_ptr;
165 q_no = q->q_no;
166 if(!q->is_input_q)
167 q_no += irq->no_input_qs;
168 again:
169 ccq = do_eqbs(irq->sch_token, state, q_no, start, cnt);
170 rc = qdio_check_ccq(q, ccq);
171 if (rc == 1) {
172 QDIO_DBF_TEXT5(1,trace,"eqAGAIN");
173 goto again;
174 }
175 if (rc < 0) {
176 QDIO_DBF_TEXT2(1,trace,"eqberr");
177 sprintf(dbf_text,"%2x,%2x,%d,%d",tmp_cnt, *cnt, ccq, q_no);
178 QDIO_DBF_TEXT2(1,trace,dbf_text);
179 q->handler(q->cdev,QDIO_STATUS_ACTIVATE_CHECK_CONDITION|
180 QDIO_STATUS_LOOK_FOR_ERROR,
181 0, 0, 0, -1, -1, q->int_parm);
182 return 0;
183 }
184 return (tmp_cnt - *cnt);
185 }
186
187 /* SQBS: set buffer states */
188 static inline int
189 qdio_do_sqbs(struct qdio_q *q, unsigned char state,
190 unsigned int *start, unsigned int *cnt)
191 {
192 struct qdio_irq *irq;
193 unsigned int tmp_cnt, q_no, ccq;
194 int rc;
195 char dbf_text[15];
196
197 ccq = 0;
198 tmp_cnt = *cnt;
199 irq = (struct qdio_irq*)q->irq_ptr;
200 q_no = q->q_no;
201 if(!q->is_input_q)
202 q_no += irq->no_input_qs;
203 again:
204 ccq = do_sqbs(irq->sch_token, state, q_no, start, cnt);
205 rc = qdio_check_ccq(q, ccq);
206 if (rc == 1) {
207 QDIO_DBF_TEXT5(1,trace,"sqAGAIN");
208 goto again;
209 }
210 if (rc < 0) {
211 QDIO_DBF_TEXT3(1,trace,"sqberr");
212 sprintf(dbf_text,"%2x,%2x,%d,%d",tmp_cnt,*cnt,ccq,q_no);
213 QDIO_DBF_TEXT3(1,trace,dbf_text);
214 q->handler(q->cdev,QDIO_STATUS_ACTIVATE_CHECK_CONDITION|
215 QDIO_STATUS_LOOK_FOR_ERROR,
216 0, 0, 0, -1, -1, q->int_parm);
217 return 0;
218 }
219 return (tmp_cnt - *cnt);
220 }
221
222 static inline int
223 qdio_set_slsb(struct qdio_q *q, unsigned int *bufno,
224 unsigned char state, unsigned int *count)
225 {
226 volatile char *slsb;
227 struct qdio_irq *irq;
228
229 irq = (struct qdio_irq*)q->irq_ptr;
230 if (!irq->is_qebsm) {
231 slsb = (char *)&q->slsb.acc.val[(*bufno)];
232 xchg(slsb, state);
233 return 1;
234 }
235 return qdio_do_sqbs(q, state, bufno, count);
236 }
237
238 #ifdef CONFIG_QDIO_DEBUG
239 static inline void
240 qdio_trace_slsb(struct qdio_q *q)
241 {
242 if (q->queue_type==QDIO_TRACE_QTYPE) {
243 if (q->is_input_q)
244 QDIO_DBF_HEX2(0,slsb_in,&q->slsb,
245 QDIO_MAX_BUFFERS_PER_Q);
246 else
247 QDIO_DBF_HEX2(0,slsb_out,&q->slsb,
248 QDIO_MAX_BUFFERS_PER_Q);
249 }
250 }
251 #endif
252
253 static inline int
254 set_slsb(struct qdio_q *q, unsigned int *bufno,
255 unsigned char state, unsigned int *count)
256 {
257 int rc;
258 #ifdef CONFIG_QDIO_DEBUG
259 qdio_trace_slsb(q);
260 #endif
261 rc = qdio_set_slsb(q, bufno, state, count);
262 #ifdef CONFIG_QDIO_DEBUG
263 qdio_trace_slsb(q);
264 #endif
265 return rc;
266 }
267 static inline int
268 qdio_siga_sync(struct qdio_q *q, unsigned int gpr2,
269 unsigned int gpr3)
270 {
271 int cc;
272
273 QDIO_DBF_TEXT4(0,trace,"sigasync");
274 QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
275
276 #ifdef QDIO_PERFORMANCE_STATS
277 perf_stats.siga_syncs++;
278 #endif /* QDIO_PERFORMANCE_STATS */
279
280 cc = do_siga_sync(q->schid, gpr2, gpr3);
281 if (cc)
282 QDIO_DBF_HEX3(0,trace,&cc,sizeof(int*));
283
284 return cc;
285 }
286
287 static inline int
288 qdio_siga_sync_q(struct qdio_q *q)
289 {
290 if (q->is_input_q)
291 return qdio_siga_sync(q, 0, q->mask);
292 return qdio_siga_sync(q, q->mask, 0);
293 }
294
295 static int
296 __do_siga_output(struct qdio_q *q, unsigned int *busy_bit)
297 {
298 struct qdio_irq *irq;
299 unsigned int fc = 0;
300 unsigned long schid;
301
302 irq = (struct qdio_irq *) q->irq_ptr;
303 if (!irq->is_qebsm)
304 schid = *((u32 *)&q->schid);
305 else {
306 schid = irq->sch_token;
307 fc |= 0x80;
308 }
309 return do_siga_output(schid, q->mask, busy_bit, fc);
310 }
311
312 /*
313 * returns QDIO_SIGA_ERROR_ACCESS_EXCEPTION as cc, when SIGA returns
314 * an access exception
315 */
316 static inline int
317 qdio_siga_output(struct qdio_q *q)
318 {
319 int cc;
320 __u32 busy_bit;
321 __u64 start_time=0;
322
323 #ifdef QDIO_PERFORMANCE_STATS
324 perf_stats.siga_outs++;
325 #endif /* QDIO_PERFORMANCE_STATS */
326
327 QDIO_DBF_TEXT4(0,trace,"sigaout");
328 QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
329
330 for (;;) {
331 cc = __do_siga_output(q, &busy_bit);
332 //QDIO_PRINT_ERR("cc=%x, busy=%x\n",cc,busy_bit);
333 if ((cc==2) && (busy_bit) && (q->is_iqdio_q)) {
334 if (!start_time)
335 start_time=NOW;
336 if ((NOW-start_time)>QDIO_BUSY_BIT_PATIENCE)
337 break;
338 } else
339 break;
340 }
341
342 if ((cc==2) && (busy_bit))
343 cc |= QDIO_SIGA_ERROR_B_BIT_SET;
344
345 if (cc)
346 QDIO_DBF_HEX3(0,trace,&cc,sizeof(int*));
347
348 return cc;
349 }
350
351 static inline int
352 qdio_siga_input(struct qdio_q *q)
353 {
354 int cc;
355
356 QDIO_DBF_TEXT4(0,trace,"sigain");
357 QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
358
359 #ifdef QDIO_PERFORMANCE_STATS
360 perf_stats.siga_ins++;
361 #endif /* QDIO_PERFORMANCE_STATS */
362
363 cc = do_siga_input(q->schid, q->mask);
364
365 if (cc)
366 QDIO_DBF_HEX3(0,trace,&cc,sizeof(int*));
367
368 return cc;
369 }
370
371 /* locked by the locks in qdio_activate and qdio_cleanup */
372 static __u32 *
373 qdio_get_indicator(void)
374 {
375 int i;
376
377 for (i=1;i<INDICATORS_PER_CACHELINE;i++)
378 if (!indicator_used[i]) {
379 indicator_used[i]=1;
380 return indicators+i;
381 }
382 atomic_inc(&spare_indicator_usecount);
383 return (__u32 * volatile) &spare_indicator;
384 }
385
386 /* locked by the locks in qdio_activate and qdio_cleanup */
387 static void
388 qdio_put_indicator(__u32 *addr)
389 {
390 int i;
391
392 if ( (addr) && (addr!=&spare_indicator) ) {
393 i=addr-indicators;
394 indicator_used[i]=0;
395 }
396 if (addr == &spare_indicator)
397 atomic_dec(&spare_indicator_usecount);
398 }
399
400 static inline void
401 tiqdio_clear_summary_bit(__u32 *location)
402 {
403 QDIO_DBF_TEXT5(0,trace,"clrsummb");
404 QDIO_DBF_HEX5(0,trace,&location,sizeof(void*));
405
406 xchg(location,0);
407 }
408
409 static inline void
410 tiqdio_set_summary_bit(__u32 *location)
411 {
412 QDIO_DBF_TEXT5(0,trace,"setsummb");
413 QDIO_DBF_HEX5(0,trace,&location,sizeof(void*));
414
415 xchg(location,-1);
416 }
417
418 static inline void
419 tiqdio_sched_tl(void)
420 {
421 tasklet_hi_schedule(&tiqdio_tasklet);
422 }
423
424 static inline void
425 qdio_mark_tiq(struct qdio_q *q)
426 {
427 unsigned long flags;
428
429 QDIO_DBF_TEXT4(0,trace,"mark iq");
430 QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
431
432 spin_lock_irqsave(&ttiq_list_lock,flags);
433 if (unlikely(atomic_read(&q->is_in_shutdown)))
434 goto out_unlock;
435
436 if (!q->is_input_q)
437 goto out_unlock;
438
439 if ((q->list_prev) || (q->list_next))
440 goto out_unlock;
441
442 if (!tiq_list) {
443 tiq_list=q;
444 q->list_prev=q;
445 q->list_next=q;
446 } else {
447 q->list_next=tiq_list;
448 q->list_prev=tiq_list->list_prev;
449 tiq_list->list_prev->list_next=q;
450 tiq_list->list_prev=q;
451 }
452 spin_unlock_irqrestore(&ttiq_list_lock,flags);
453
454 tiqdio_set_summary_bit((__u32*)q->dev_st_chg_ind);
455 tiqdio_sched_tl();
456 return;
457 out_unlock:
458 spin_unlock_irqrestore(&ttiq_list_lock,flags);
459 return;
460 }
461
462 static inline void
463 qdio_mark_q(struct qdio_q *q)
464 {
465 QDIO_DBF_TEXT4(0,trace,"mark q");
466 QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
467
468 if (unlikely(atomic_read(&q->is_in_shutdown)))
469 return;
470
471 tasklet_schedule(&q->tasklet);
472 }
473
474 static inline int
475 qdio_stop_polling(struct qdio_q *q)
476 {
477 #ifdef QDIO_USE_PROCESSING_STATE
478 unsigned int tmp, gsf, count = 1;
479 unsigned char state = 0;
480 struct qdio_irq *irq = (struct qdio_irq *) q->irq_ptr;
481
482 if (!atomic_swap(&q->polling,0))
483 return 1;
484
485 QDIO_DBF_TEXT4(0,trace,"stoppoll");
486 QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
487
488 /* show the card that we are not polling anymore */
489 if (!q->is_input_q)
490 return 1;
491
492 tmp = gsf = GET_SAVED_FRONTIER(q);
493 tmp = ((tmp + QDIO_MAX_BUFFERS_PER_Q-1) & (QDIO_MAX_BUFFERS_PER_Q-1) );
494 set_slsb(q, &tmp, SLSB_P_INPUT_NOT_INIT, &count);
495
496 /*
497 * we don't issue this SYNC_MEMORY, as we trust Rick T and
498 * moreover will not use the PROCESSING state under VM, so
499 * q->polling was 0 anyway
500 */
501 /*SYNC_MEMORY;*/
502 if (irq->is_qebsm) {
503 count = 1;
504 qdio_do_eqbs(q, &state, &gsf, &count);
505 } else
506 state = q->slsb.acc.val[gsf];
507 if (state != SLSB_P_INPUT_PRIMED)
508 return 1;
509 /*
510 * set our summary bit again, as otherwise there is a
511 * small window we can miss between resetting it and
512 * checking for PRIMED state
513 */
514 if (q->is_thinint_q)
515 tiqdio_set_summary_bit((__u32*)q->dev_st_chg_ind);
516 return 0;
517
518 #else /* QDIO_USE_PROCESSING_STATE */
519 return 1;
520 #endif /* QDIO_USE_PROCESSING_STATE */
521 }
522
523 /*
524 * see the comment in do_QDIO and before qdio_reserve_q about the
525 * sophisticated locking outside of unmark_q, so that we don't need to
526 * disable the interrupts :-)
527 */
528 static inline void
529 qdio_unmark_q(struct qdio_q *q)
530 {
531 unsigned long flags;
532
533 QDIO_DBF_TEXT4(0,trace,"unmark q");
534 QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
535
536 if ((!q->list_prev)||(!q->list_next))
537 return;
538
539 if ((q->is_thinint_q)&&(q->is_input_q)) {
540 /* iQDIO */
541 spin_lock_irqsave(&ttiq_list_lock,flags);
542 /* in case cleanup has done this already and simultanously
543 * qdio_unmark_q is called from the interrupt handler, we've
544 * got to check this in this specific case again */
545 if ((!q->list_prev)||(!q->list_next))
546 goto out;
547 if (q->list_next==q) {
548 /* q was the only interesting q */
549 tiq_list=NULL;
550 q->list_next=NULL;
551 q->list_prev=NULL;
552 } else {
553 q->list_next->list_prev=q->list_prev;
554 q->list_prev->list_next=q->list_next;
555 tiq_list=q->list_next;
556 q->list_next=NULL;
557 q->list_prev=NULL;
558 }
559 out:
560 spin_unlock_irqrestore(&ttiq_list_lock,flags);
561 }
562 }
563
564 static inline unsigned long
565 tiqdio_clear_global_summary(void)
566 {
567 unsigned long time;
568
569 QDIO_DBF_TEXT5(0,trace,"clrglobl");
570
571 time = do_clear_global_summary();
572
573 QDIO_DBF_HEX5(0,trace,&time,sizeof(unsigned long));
574
575 return time;
576 }
577
578
579 /************************* OUTBOUND ROUTINES *******************************/
580 static int
581 qdio_qebsm_get_outbound_buffer_frontier(struct qdio_q *q)
582 {
583 struct qdio_irq *irq;
584 unsigned char state;
585 unsigned int cnt, count, ftc;
586
587 irq = (struct qdio_irq *) q->irq_ptr;
588 if ((!q->is_iqdio_q) && (!q->hydra_gives_outbound_pcis))
589 SYNC_MEMORY;
590
591 ftc = q->first_to_check;
592 count = qdio_min(atomic_read(&q->number_of_buffers_used),
593 (QDIO_MAX_BUFFERS_PER_Q-1));
594 if (count == 0)
595 return q->first_to_check;
596 cnt = qdio_do_eqbs(q, &state, &ftc, &count);
597 if (cnt == 0)
598 return q->first_to_check;
599 switch (state) {
600 case SLSB_P_OUTPUT_ERROR:
601 QDIO_DBF_TEXT3(0,trace,"outperr");
602 atomic_sub(cnt , &q->number_of_buffers_used);
603 if (q->qdio_error)
604 q->error_status_flags |=
605 QDIO_STATUS_MORE_THAN_ONE_QDIO_ERROR;
606 q->qdio_error = SLSB_P_OUTPUT_ERROR;
607 q->error_status_flags |= QDIO_STATUS_LOOK_FOR_ERROR;
608 q->first_to_check = ftc;
609 break;
610 case SLSB_P_OUTPUT_EMPTY:
611 QDIO_DBF_TEXT5(0,trace,"outpempt");
612 atomic_sub(cnt, &q->number_of_buffers_used);
613 q->first_to_check = ftc;
614 break;
615 case SLSB_CU_OUTPUT_PRIMED:
616 /* all buffers primed */
617 QDIO_DBF_TEXT5(0,trace,"outpprim");
618 break;
619 default:
620 break;
621 }
622 QDIO_DBF_HEX4(0,trace,&q->first_to_check,sizeof(int));
623 return q->first_to_check;
624 }
625
626 static int
627 qdio_qebsm_get_inbound_buffer_frontier(struct qdio_q *q)
628 {
629 struct qdio_irq *irq;
630 unsigned char state;
631 int tmp, ftc, count, cnt;
632 char dbf_text[15];
633
634
635 irq = (struct qdio_irq *) q->irq_ptr;
636 ftc = q->first_to_check;
637 count = qdio_min(atomic_read(&q->number_of_buffers_used),
638 (QDIO_MAX_BUFFERS_PER_Q-1));
639 if (count == 0)
640 return q->first_to_check;
641 cnt = qdio_do_eqbs(q, &state, &ftc, &count);
642 if (cnt == 0)
643 return q->first_to_check;
644 switch (state) {
645 case SLSB_P_INPUT_ERROR :
646 #ifdef CONFIG_QDIO_DEBUG
647 QDIO_DBF_TEXT3(1,trace,"inperr");
648 sprintf(dbf_text,"%2x,%2x",ftc,count);
649 QDIO_DBF_TEXT3(1,trace,dbf_text);
650 #endif /* CONFIG_QDIO_DEBUG */
651 if (q->qdio_error)
652 q->error_status_flags |=
653 QDIO_STATUS_MORE_THAN_ONE_QDIO_ERROR;
654 q->qdio_error = SLSB_P_INPUT_ERROR;
655 q->error_status_flags |= QDIO_STATUS_LOOK_FOR_ERROR;
656 atomic_sub(cnt, &q->number_of_buffers_used);
657 q->first_to_check = ftc;
658 break;
659 case SLSB_P_INPUT_PRIMED :
660 QDIO_DBF_TEXT3(0,trace,"inptprim");
661 sprintf(dbf_text,"%2x,%2x",ftc,count);
662 QDIO_DBF_TEXT3(1,trace,dbf_text);
663 tmp = 0;
664 ftc = q->first_to_check;
665 #ifdef QDIO_USE_PROCESSING_STATE
666 if (cnt > 1) {
667 cnt -= 1;
668 tmp = set_slsb(q, &ftc, SLSB_P_INPUT_NOT_INIT, &cnt);
669 if (!tmp)
670 break;
671 }
672 cnt = 1;
673 tmp += set_slsb(q, &ftc,
674 SLSB_P_INPUT_PROCESSING, &cnt);
675 atomic_set(&q->polling, 1);
676 #else
677 tmp = set_slsb(q, &ftc, SLSB_P_INPUT_NOT_INIT, &cnt);
678 #endif
679 atomic_sub(tmp, &q->number_of_buffers_used);
680 q->first_to_check = ftc;
681 break;
682 case SLSB_CU_INPUT_EMPTY:
683 case SLSB_P_INPUT_NOT_INIT:
684 case SLSB_P_INPUT_PROCESSING:
685 QDIO_DBF_TEXT5(0,trace,"inpnipro");
686 break;
687 default:
688 break;
689 }
690 QDIO_DBF_HEX4(0,trace,&q->first_to_check,sizeof(int));
691 return q->first_to_check;
692 }
693
694 static inline int
695 qdio_get_outbound_buffer_frontier(struct qdio_q *q)
696 {
697 struct qdio_irq *irq;
698 volatile char *slsb;
699 unsigned int count = 1;
700 int first_not_to_check, f, f_mod_no;
701 char dbf_text[15];
702
703 QDIO_DBF_TEXT4(0,trace,"getobfro");
704 QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
705
706 irq = (struct qdio_irq *) q->irq_ptr;
707 if (irq->is_qebsm)
708 return qdio_qebsm_get_outbound_buffer_frontier(q);
709
710 slsb=&q->slsb.acc.val[0];
711 f_mod_no=f=q->first_to_check;
712 /*
713 * f points to already processed elements, so f+no_used is correct...
714 * ... but: we don't check 128 buffers, as otherwise
715 * qdio_has_outbound_q_moved would return 0
716 */
717 first_not_to_check=f+qdio_min(atomic_read(&q->number_of_buffers_used),
718 (QDIO_MAX_BUFFERS_PER_Q-1));
719
720 if ((!q->is_iqdio_q)&&(!q->hydra_gives_outbound_pcis))
721 SYNC_MEMORY;
722
723 check_next:
724 if (f==first_not_to_check)
725 goto out;
726
727 switch(slsb[f_mod_no]) {
728
729 /* the adapter has not fetched the output yet */
730 case SLSB_CU_OUTPUT_PRIMED:
731 QDIO_DBF_TEXT5(0,trace,"outpprim");
732 break;
733
734 /* the adapter got it */
735 case SLSB_P_OUTPUT_EMPTY:
736 atomic_dec(&q->number_of_buffers_used);
737 f++;
738 f_mod_no=f&(QDIO_MAX_BUFFERS_PER_Q-1);
739 QDIO_DBF_TEXT5(0,trace,"outpempt");
740 goto check_next;
741
742 case SLSB_P_OUTPUT_ERROR:
743 QDIO_DBF_TEXT3(0,trace,"outperr");
744 sprintf(dbf_text,"%x-%x-%x",f_mod_no,
745 q->sbal[f_mod_no]->element[14].sbalf.value,
746 q->sbal[f_mod_no]->element[15].sbalf.value);
747 QDIO_DBF_TEXT3(1,trace,dbf_text);
748 QDIO_DBF_HEX2(1,sbal,q->sbal[f_mod_no],256);
749
750 /* kind of process the buffer */
751 set_slsb(q, &f_mod_no, SLSB_P_OUTPUT_NOT_INIT, &count);
752
753 /*
754 * we increment the frontier, as this buffer
755 * was processed obviously
756 */
757 atomic_dec(&q->number_of_buffers_used);
758 f_mod_no=(f_mod_no+1)&(QDIO_MAX_BUFFERS_PER_Q-1);
759
760 if (q->qdio_error)
761 q->error_status_flags|=
762 QDIO_STATUS_MORE_THAN_ONE_QDIO_ERROR;
763 q->qdio_error=SLSB_P_OUTPUT_ERROR;
764 q->error_status_flags|=QDIO_STATUS_LOOK_FOR_ERROR;
765
766 break;
767
768 /* no new buffers */
769 default:
770 QDIO_DBF_TEXT5(0,trace,"outpni");
771 }
772 out:
773 return (q->first_to_check=f_mod_no);
774 }
775
776 /* all buffers are processed */
777 static inline int
778 qdio_is_outbound_q_done(struct qdio_q *q)
779 {
780 int no_used;
781 #ifdef CONFIG_QDIO_DEBUG
782 char dbf_text[15];
783 #endif
784
785 no_used=atomic_read(&q->number_of_buffers_used);
786
787 #ifdef CONFIG_QDIO_DEBUG
788 if (no_used) {
789 sprintf(dbf_text,"oqisnt%02x",no_used);
790 QDIO_DBF_TEXT4(0,trace,dbf_text);
791 } else {
792 QDIO_DBF_TEXT4(0,trace,"oqisdone");
793 }
794 QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
795 #endif /* CONFIG_QDIO_DEBUG */
796 return (no_used==0);
797 }
798
799 static inline int
800 qdio_has_outbound_q_moved(struct qdio_q *q)
801 {
802 int i;
803
804 i=qdio_get_outbound_buffer_frontier(q);
805
806 if ( (i!=GET_SAVED_FRONTIER(q)) ||
807 (q->error_status_flags&QDIO_STATUS_LOOK_FOR_ERROR) ) {
808 SAVE_FRONTIER(q,i);
809 QDIO_DBF_TEXT4(0,trace,"oqhasmvd");
810 QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
811 return 1;
812 } else {
813 QDIO_DBF_TEXT4(0,trace,"oqhsntmv");
814 QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
815 return 0;
816 }
817 }
818
819 static inline void
820 qdio_kick_outbound_q(struct qdio_q *q)
821 {
822 int result;
823 #ifdef CONFIG_QDIO_DEBUG
824 char dbf_text[15];
825
826 QDIO_DBF_TEXT4(0,trace,"kickoutq");
827 QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
828 #endif /* CONFIG_QDIO_DEBUG */
829
830 if (!q->siga_out)
831 return;
832
833 /* here's the story with cc=2 and busy bit set (thanks, Rick):
834 * VM's CP could present us cc=2 and busy bit set on SIGA-write
835 * during reconfiguration of their Guest LAN (only in HIPERS mode,
836 * QDIO mode is asynchronous -- cc=2 and busy bit there will take
837 * the queues down immediately; and not being under VM we have a
838 * problem on cc=2 and busy bit set right away).
839 *
840 * Therefore qdio_siga_output will try for a short time constantly,
841 * if such a condition occurs. If it doesn't change, it will
842 * increase the busy_siga_counter and save the timestamp, and
843 * schedule the queue for later processing (via mark_q, using the
844 * queue tasklet). __qdio_outbound_processing will check out the
845 * counter. If non-zero, it will call qdio_kick_outbound_q as often
846 * as the value of the counter. This will attempt further SIGA
847 * instructions. For each successful SIGA, the counter is
848 * decreased, for failing SIGAs the counter remains the same, after
849 * all.
850 * After some time of no movement, qdio_kick_outbound_q will
851 * finally fail and reflect corresponding error codes to call
852 * the upper layer module and have it take the queues down.
853 *
854 * Note that this is a change from the original HiperSockets design
855 * (saying cc=2 and busy bit means take the queues down), but in
856 * these days Guest LAN didn't exist... excessive cc=2 with busy bit
857 * conditions will still take the queues down, but the threshold is
858 * higher due to the Guest LAN environment.
859 */
860
861
862 result=qdio_siga_output(q);
863
864 switch (result) {
865 case 0:
866 /* went smooth this time, reset timestamp */
867 #ifdef CONFIG_QDIO_DEBUG
868 QDIO_DBF_TEXT3(0,trace,"cc2reslv");
869 sprintf(dbf_text,"%4x%2x%2x",q->schid.sch_no,q->q_no,
870 atomic_read(&q->busy_siga_counter));
871 QDIO_DBF_TEXT3(0,trace,dbf_text);
872 #endif /* CONFIG_QDIO_DEBUG */
873 q->timing.busy_start=0;
874 break;
875 case (2|QDIO_SIGA_ERROR_B_BIT_SET):
876 /* cc=2 and busy bit: */
877 atomic_inc(&q->busy_siga_counter);
878
879 /* if the last siga was successful, save
880 * timestamp here */
881 if (!q->timing.busy_start)
882 q->timing.busy_start=NOW;
883
884 /* if we're in time, don't touch error_status_flags
885 * and siga_error */
886 if (NOW-q->timing.busy_start<QDIO_BUSY_BIT_GIVE_UP) {
887 qdio_mark_q(q);
888 break;
889 }
890 QDIO_DBF_TEXT2(0,trace,"cc2REPRT");
891 #ifdef CONFIG_QDIO_DEBUG
892 sprintf(dbf_text,"%4x%2x%2x",q->schid.sch_no,q->q_no,
893 atomic_read(&q->busy_siga_counter));
894 QDIO_DBF_TEXT3(0,trace,dbf_text);
895 #endif /* CONFIG_QDIO_DEBUG */
896 /* else fallthrough and report error */
897 default:
898 /* for plain cc=1, 2 or 3: */
899 if (q->siga_error)
900 q->error_status_flags|=
901 QDIO_STATUS_MORE_THAN_ONE_SIGA_ERROR;
902 q->error_status_flags|=
903 QDIO_STATUS_LOOK_FOR_ERROR;
904 q->siga_error=result;
905 }
906 }
907
908 static inline void
909 qdio_kick_outbound_handler(struct qdio_q *q)
910 {
911 int start, end, real_end, count;
912 #ifdef CONFIG_QDIO_DEBUG
913 char dbf_text[15];
914 #endif
915
916 start = q->first_element_to_kick;
917 /* last_move_ftc was just updated */
918 real_end = GET_SAVED_FRONTIER(q);
919 end = (real_end+QDIO_MAX_BUFFERS_PER_Q-1)&
920 (QDIO_MAX_BUFFERS_PER_Q-1);
921 count = (end+QDIO_MAX_BUFFERS_PER_Q+1-start)&
922 (QDIO_MAX_BUFFERS_PER_Q-1);
923
924 #ifdef CONFIG_QDIO_DEBUG
925 QDIO_DBF_TEXT4(0,trace,"kickouth");
926 QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
927
928 sprintf(dbf_text,"s=%2xc=%2x",start,count);
929 QDIO_DBF_TEXT4(0,trace,dbf_text);
930 #endif /* CONFIG_QDIO_DEBUG */
931
932 if (q->state==QDIO_IRQ_STATE_ACTIVE)
933 q->handler(q->cdev,QDIO_STATUS_OUTBOUND_INT|
934 q->error_status_flags,
935 q->qdio_error,q->siga_error,q->q_no,start,count,
936 q->int_parm);
937
938 /* for the next time: */
939 q->first_element_to_kick=real_end;
940 q->qdio_error=0;
941 q->siga_error=0;
942 q->error_status_flags=0;
943 }
944
945 static inline void
946 __qdio_outbound_processing(struct qdio_q *q)
947 {
948 int siga_attempts;
949
950 QDIO_DBF_TEXT4(0,trace,"qoutproc");
951 QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
952
953 if (unlikely(qdio_reserve_q(q))) {
954 qdio_release_q(q);
955 #ifdef QDIO_PERFORMANCE_STATS
956 o_p_c++;
957 #endif /* QDIO_PERFORMANCE_STATS */
958 /* as we're sissies, we'll check next time */
959 if (likely(!atomic_read(&q->is_in_shutdown))) {
960 qdio_mark_q(q);
961 QDIO_DBF_TEXT4(0,trace,"busy,agn");
962 }
963 return;
964 }
965 #ifdef QDIO_PERFORMANCE_STATS
966 o_p_nc++;
967 perf_stats.tl_runs++;
968 #endif /* QDIO_PERFORMANCE_STATS */
969
970 /* see comment in qdio_kick_outbound_q */
971 siga_attempts=atomic_read(&q->busy_siga_counter);
972 while (siga_attempts) {
973 atomic_dec(&q->busy_siga_counter);
974 qdio_kick_outbound_q(q);
975 siga_attempts--;
976 }
977
978 if (qdio_has_outbound_q_moved(q))
979 qdio_kick_outbound_handler(q);
980
981 if (q->is_iqdio_q) {
982 /*
983 * for asynchronous queues, we better check, if the fill
984 * level is too high. for synchronous queues, the fill
985 * level will never be that high.
986 */
987 if (atomic_read(&q->number_of_buffers_used)>
988 IQDIO_FILL_LEVEL_TO_POLL)
989 qdio_mark_q(q);
990
991 } else if (!q->hydra_gives_outbound_pcis)
992 if (!qdio_is_outbound_q_done(q))
993 qdio_mark_q(q);
994
995 qdio_release_q(q);
996 }
997
998 static void
999 qdio_outbound_processing(struct qdio_q *q)
1000 {
1001 __qdio_outbound_processing(q);
1002 }
1003
1004 /************************* INBOUND ROUTINES *******************************/
1005
1006
1007 static inline int
1008 qdio_get_inbound_buffer_frontier(struct qdio_q *q)
1009 {
1010 struct qdio_irq *irq;
1011 int f,f_mod_no;
1012 volatile char *slsb;
1013 unsigned int count = 1;
1014 int first_not_to_check;
1015 #ifdef CONFIG_QDIO_DEBUG
1016 char dbf_text[15];
1017 #endif /* CONFIG_QDIO_DEBUG */
1018 #ifdef QDIO_USE_PROCESSING_STATE
1019 int last_position=-1;
1020 #endif /* QDIO_USE_PROCESSING_STATE */
1021
1022 QDIO_DBF_TEXT4(0,trace,"getibfro");
1023 QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
1024
1025 irq = (struct qdio_irq *) q->irq_ptr;
1026 if (irq->is_qebsm)
1027 return qdio_qebsm_get_inbound_buffer_frontier(q);
1028
1029 slsb=&q->slsb.acc.val[0];
1030 f_mod_no=f=q->first_to_check;
1031 /*
1032 * we don't check 128 buffers, as otherwise qdio_has_inbound_q_moved
1033 * would return 0
1034 */
1035 first_not_to_check=f+qdio_min(atomic_read(&q->number_of_buffers_used),
1036 (QDIO_MAX_BUFFERS_PER_Q-1));
1037
1038 /*
1039 * we don't use this one, as a PCI or we after a thin interrupt
1040 * will sync the queues
1041 */
1042 /* SYNC_MEMORY;*/
1043
1044 check_next:
1045 f_mod_no=f&(QDIO_MAX_BUFFERS_PER_Q-1);
1046 if (f==first_not_to_check)
1047 goto out;
1048 switch (slsb[f_mod_no]) {
1049
1050 /* CU_EMPTY means frontier is reached */
1051 case SLSB_CU_INPUT_EMPTY:
1052 QDIO_DBF_TEXT5(0,trace,"inptempt");
1053 break;
1054
1055 /* P_PRIMED means set slsb to P_PROCESSING and move on */
1056 case SLSB_P_INPUT_PRIMED:
1057 QDIO_DBF_TEXT5(0,trace,"inptprim");
1058
1059 #ifdef QDIO_USE_PROCESSING_STATE
1060 /*
1061 * as soon as running under VM, polling the input queues will
1062 * kill VM in terms of CP overhead
1063 */
1064 if (q->siga_sync) {
1065 set_slsb(q, &f_mod_no, SLSB_P_INPUT_NOT_INIT, &count);
1066 } else {
1067 /* set the previous buffer to NOT_INIT. The current
1068 * buffer will be set to PROCESSING at the end of
1069 * this function to avoid further interrupts. */
1070 if (last_position>=0)
1071 set_slsb(q, &last_position,
1072 SLSB_P_INPUT_NOT_INIT, &count);
1073 atomic_set(&q->polling,1);
1074 last_position=f_mod_no;
1075 }
1076 #else /* QDIO_USE_PROCESSING_STATE */
1077 set_slsb(q, &f_mod_no, SLSB_P_INPUT_NOT_INIT, &count);
1078 #endif /* QDIO_USE_PROCESSING_STATE */
1079 /*
1080 * not needed, as the inbound queue will be synced on the next
1081 * siga-r, resp. tiqdio_is_inbound_q_done will do the siga-s
1082 */
1083 /*SYNC_MEMORY;*/
1084 f++;
1085 atomic_dec(&q->number_of_buffers_used);
1086 goto check_next;
1087
1088 case SLSB_P_INPUT_NOT_INIT:
1089 case SLSB_P_INPUT_PROCESSING:
1090 QDIO_DBF_TEXT5(0,trace,"inpnipro");
1091 break;
1092
1093 /* P_ERROR means frontier is reached, break and report error */
1094 case SLSB_P_INPUT_ERROR:
1095 #ifdef CONFIG_QDIO_DEBUG
1096 sprintf(dbf_text,"inperr%2x",f_mod_no);
1097 QDIO_DBF_TEXT3(1,trace,dbf_text);
1098 #endif /* CONFIG_QDIO_DEBUG */
1099 QDIO_DBF_HEX2(1,sbal,q->sbal[f_mod_no],256);
1100
1101 /* kind of process the buffer */
1102 set_slsb(q, &f_mod_no, SLSB_P_INPUT_NOT_INIT, &count);
1103
1104 if (q->qdio_error)
1105 q->error_status_flags|=
1106 QDIO_STATUS_MORE_THAN_ONE_QDIO_ERROR;
1107 q->qdio_error=SLSB_P_INPUT_ERROR;
1108 q->error_status_flags|=QDIO_STATUS_LOOK_FOR_ERROR;
1109
1110 /* we increment the frontier, as this buffer
1111 * was processed obviously */
1112 f_mod_no=(f_mod_no+1)&(QDIO_MAX_BUFFERS_PER_Q-1);
1113 atomic_dec(&q->number_of_buffers_used);
1114
1115 #ifdef QDIO_USE_PROCESSING_STATE
1116 last_position=-1;
1117 #endif /* QDIO_USE_PROCESSING_STATE */
1118
1119 break;
1120
1121 /* everything else means frontier not changed (HALTED or so) */
1122 default:
1123 break;
1124 }
1125 out:
1126 q->first_to_check=f_mod_no;
1127
1128 #ifdef QDIO_USE_PROCESSING_STATE
1129 if (last_position>=0)
1130 set_slsb(q, &last_position, SLSB_P_INPUT_NOT_INIT, &count);
1131 #endif /* QDIO_USE_PROCESSING_STATE */
1132
1133 QDIO_DBF_HEX4(0,trace,&q->first_to_check,sizeof(int));
1134
1135 return q->first_to_check;
1136 }
1137
1138 static inline int
1139 qdio_has_inbound_q_moved(struct qdio_q *q)
1140 {
1141 int i;
1142
1143 #ifdef QDIO_PERFORMANCE_STATS
1144 static int old_pcis=0;
1145 static int old_thinints=0;
1146
1147 if ((old_pcis==perf_stats.pcis)&&(old_thinints==perf_stats.thinints))
1148 perf_stats.start_time_inbound=NOW;
1149 else
1150 old_pcis=perf_stats.pcis;
1151 #endif /* QDIO_PERFORMANCE_STATS */
1152
1153 i=qdio_get_inbound_buffer_frontier(q);
1154 if ( (i!=GET_SAVED_FRONTIER(q)) ||
1155 (q->error_status_flags&QDIO_STATUS_LOOK_FOR_ERROR) ) {
1156 SAVE_FRONTIER(q,i);
1157 if ((!q->siga_sync)&&(!q->hydra_gives_outbound_pcis))
1158 SAVE_TIMESTAMP(q);
1159
1160 QDIO_DBF_TEXT4(0,trace,"inhasmvd");
1161 QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
1162 return 1;
1163 } else {
1164 QDIO_DBF_TEXT4(0,trace,"inhsntmv");
1165 QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
1166 return 0;
1167 }
1168 }
1169
1170 /* means, no more buffers to be filled */
1171 static inline int
1172 tiqdio_is_inbound_q_done(struct qdio_q *q)
1173 {
1174 int no_used;
1175 unsigned int start_buf, count;
1176 unsigned char state = 0;
1177 struct qdio_irq *irq = (struct qdio_irq *) q->irq_ptr;
1178
1179 #ifdef CONFIG_QDIO_DEBUG
1180 char dbf_text[15];
1181 #endif
1182
1183 no_used=atomic_read(&q->number_of_buffers_used);
1184
1185 /* propagate the change from 82 to 80 through VM */
1186 SYNC_MEMORY;
1187
1188 #ifdef CONFIG_QDIO_DEBUG
1189 if (no_used) {
1190 sprintf(dbf_text,"iqisnt%02x",no_used);
1191 QDIO_DBF_TEXT4(0,trace,dbf_text);
1192 } else {
1193 QDIO_DBF_TEXT4(0,trace,"iniqisdo");
1194 }
1195 QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
1196 #endif /* CONFIG_QDIO_DEBUG */
1197
1198 if (!no_used)
1199 return 1;
1200 if (!q->siga_sync && !irq->is_qebsm)
1201 /* we'll check for more primed buffers in qeth_stop_polling */
1202 return 0;
1203 if (irq->is_qebsm) {
1204 count = 1;
1205 start_buf = q->first_to_check;
1206 qdio_do_eqbs(q, &state, &start_buf, &count);
1207 } else
1208 state = q->slsb.acc.val[q->first_to_check];
1209 if (state != SLSB_P_INPUT_PRIMED)
1210 /*
1211 * nothing more to do, if next buffer is not PRIMED.
1212 * note that we did a SYNC_MEMORY before, that there
1213 * has been a sychnronization.
1214 * we will return 0 below, as there is nothing to do
1215 * (stop_polling not necessary, as we have not been
1216 * using the PROCESSING state
1217 */
1218 return 0;
1219
1220 /*
1221 * ok, the next input buffer is primed. that means, that device state
1222 * change indicator and adapter local summary are set, so we will find
1223 * it next time.
1224 * we will return 0 below, as there is nothing to do, except scheduling
1225 * ourselves for the next time.
1226 */
1227 tiqdio_set_summary_bit((__u32*)q->dev_st_chg_ind);
1228 tiqdio_sched_tl();
1229 return 0;
1230 }
1231
1232 static inline int
1233 qdio_is_inbound_q_done(struct qdio_q *q)
1234 {
1235 int no_used;
1236 unsigned int start_buf, count;
1237 unsigned char state = 0;
1238 struct qdio_irq *irq = (struct qdio_irq *) q->irq_ptr;
1239
1240 #ifdef CONFIG_QDIO_DEBUG
1241 char dbf_text[15];
1242 #endif
1243
1244 no_used=atomic_read(&q->number_of_buffers_used);
1245
1246 /*
1247 * we need that one for synchronization with the adapter, as it
1248 * does a kind of PCI avoidance
1249 */
1250 SYNC_MEMORY;
1251
1252 if (!no_used) {
1253 QDIO_DBF_TEXT4(0,trace,"inqisdnA");
1254 QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
1255 QDIO_DBF_TEXT4(0,trace,dbf_text);
1256 return 1;
1257 }
1258 if (irq->is_qebsm) {
1259 count = 1;
1260 start_buf = q->first_to_check;
1261 qdio_do_eqbs(q, &state, &start_buf, &count);
1262 } else
1263 state = q->slsb.acc.val[q->first_to_check];
1264 if (state == SLSB_P_INPUT_PRIMED) {
1265 /* we got something to do */
1266 QDIO_DBF_TEXT4(0,trace,"inqisntA");
1267 QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
1268 return 0;
1269 }
1270
1271 /* on VM, we don't poll, so the q is always done here */
1272 if (q->siga_sync)
1273 return 1;
1274 if (q->hydra_gives_outbound_pcis)
1275 return 1;
1276
1277 /*
1278 * at this point we know, that inbound first_to_check
1279 * has (probably) not moved (see qdio_inbound_processing)
1280 */
1281 if (NOW>GET_SAVED_TIMESTAMP(q)+q->timing.threshold) {
1282 #ifdef CONFIG_QDIO_DEBUG
1283 QDIO_DBF_TEXT4(0,trace,"inqisdon");
1284 QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
1285 sprintf(dbf_text,"pf%02xcn%02x",q->first_to_check,no_used);
1286 QDIO_DBF_TEXT4(0,trace,dbf_text);
1287 #endif /* CONFIG_QDIO_DEBUG */
1288 return 1;
1289 } else {
1290 #ifdef CONFIG_QDIO_DEBUG
1291 QDIO_DBF_TEXT4(0,trace,"inqisntd");
1292 QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
1293 sprintf(dbf_text,"pf%02xcn%02x",q->first_to_check,no_used);
1294 QDIO_DBF_TEXT4(0,trace,dbf_text);
1295 #endif /* CONFIG_QDIO_DEBUG */
1296 return 0;
1297 }
1298 }
1299
1300 static inline void
1301 qdio_kick_inbound_handler(struct qdio_q *q)
1302 {
1303 int count, start, end, real_end, i;
1304 #ifdef CONFIG_QDIO_DEBUG
1305 char dbf_text[15];
1306 #endif
1307
1308 QDIO_DBF_TEXT4(0,trace,"kickinh");
1309 QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
1310
1311 start=q->first_element_to_kick;
1312 real_end=q->first_to_check;
1313 end=(real_end+QDIO_MAX_BUFFERS_PER_Q-1)&(QDIO_MAX_BUFFERS_PER_Q-1);
1314
1315 i=start;
1316 count=0;
1317 while (1) {
1318 count++;
1319 if (i==end)
1320 break;
1321 i=(i+1)&(QDIO_MAX_BUFFERS_PER_Q-1);
1322 }
1323
1324 #ifdef CONFIG_QDIO_DEBUG
1325 sprintf(dbf_text,"s=%2xc=%2x",start,count);
1326 QDIO_DBF_TEXT4(0,trace,dbf_text);
1327 #endif /* CONFIG_QDIO_DEBUG */
1328
1329 if (likely(q->state==QDIO_IRQ_STATE_ACTIVE))
1330 q->handler(q->cdev,
1331 QDIO_STATUS_INBOUND_INT|q->error_status_flags,
1332 q->qdio_error,q->siga_error,q->q_no,start,count,
1333 q->int_parm);
1334
1335 /* for the next time: */
1336 q->first_element_to_kick=real_end;
1337 q->qdio_error=0;
1338 q->siga_error=0;
1339 q->error_status_flags=0;
1340
1341 #ifdef QDIO_PERFORMANCE_STATS
1342 perf_stats.inbound_time+=NOW-perf_stats.start_time_inbound;
1343 perf_stats.inbound_cnt++;
1344 #endif /* QDIO_PERFORMANCE_STATS */
1345 }
1346
1347 static inline void
1348 __tiqdio_inbound_processing(struct qdio_q *q, int spare_ind_was_set)
1349 {
1350 struct qdio_irq *irq_ptr;
1351 struct qdio_q *oq;
1352 int i;
1353
1354 QDIO_DBF_TEXT4(0,trace,"iqinproc");
1355 QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
1356
1357 /*
1358 * we first want to reserve the q, so that we know, that we don't
1359 * interrupt ourselves and call qdio_unmark_q, as is_in_shutdown might
1360 * be set
1361 */
1362 if (unlikely(qdio_reserve_q(q))) {
1363 qdio_release_q(q);
1364 #ifdef QDIO_PERFORMANCE_STATS
1365 ii_p_c++;
1366 #endif /* QDIO_PERFORMANCE_STATS */
1367 /*
1368 * as we might just be about to stop polling, we make
1369 * sure that we check again at least once more
1370 */
1371 tiqdio_sched_tl();
1372 return;
1373 }
1374 #ifdef QDIO_PERFORMANCE_STATS
1375 ii_p_nc++;
1376 #endif /* QDIO_PERFORMANCE_STATS */
1377 if (unlikely(atomic_read(&q->is_in_shutdown))) {
1378 qdio_unmark_q(q);
1379 goto out;
1380 }
1381
1382 /*
1383 * we reset spare_ind_was_set, when the queue does not use the
1384 * spare indicator
1385 */
1386 if (spare_ind_was_set)
1387 spare_ind_was_set = (q->dev_st_chg_ind == &spare_indicator);
1388
1389 if (!(*(q->dev_st_chg_ind)) && !spare_ind_was_set)
1390 goto out;
1391 /*
1392 * q->dev_st_chg_ind is the indicator, be it shared or not.
1393 * only clear it, if indicator is non-shared
1394 */
1395 if (!spare_ind_was_set)
1396 tiqdio_clear_summary_bit((__u32*)q->dev_st_chg_ind);
1397
1398 if (q->hydra_gives_outbound_pcis) {
1399 if (!q->siga_sync_done_on_thinints) {
1400 SYNC_MEMORY_ALL;
1401 } else if ((!q->siga_sync_done_on_outb_tis)&&
1402 (q->hydra_gives_outbound_pcis)) {
1403 SYNC_MEMORY_ALL_OUTB;
1404 }
1405 } else {
1406 SYNC_MEMORY;
1407 }
1408 /*
1409 * maybe we have to do work on our outbound queues... at least
1410 * we have to check the outbound-int-capable thinint-capable
1411 * queues
1412 */
1413 if (q->hydra_gives_outbound_pcis) {
1414 irq_ptr = (struct qdio_irq*)q->irq_ptr;
1415 for (i=0;i<irq_ptr->no_output_qs;i++) {
1416 oq = irq_ptr->output_qs[i];
1417 #ifdef QDIO_PERFORMANCE_STATS
1418 perf_stats.tl_runs--;
1419 #endif /* QDIO_PERFORMANCE_STATS */
1420 if (!qdio_is_outbound_q_done(oq))
1421 __qdio_outbound_processing(oq);
1422 }
1423 }
1424
1425 if (!qdio_has_inbound_q_moved(q))
1426 goto out;
1427
1428 qdio_kick_inbound_handler(q);
1429 if (tiqdio_is_inbound_q_done(q))
1430 if (!qdio_stop_polling(q)) {
1431 /*
1432 * we set the flags to get into the stuff next time,
1433 * see also comment in qdio_stop_polling
1434 */
1435 tiqdio_set_summary_bit((__u32*)q->dev_st_chg_ind);
1436 tiqdio_sched_tl();
1437 }
1438 out:
1439 qdio_release_q(q);
1440 }
1441
1442 static void
1443 tiqdio_inbound_processing(struct qdio_q *q)
1444 {
1445 __tiqdio_inbound_processing(q, atomic_read(&spare_indicator_usecount));
1446 }
1447
1448 static inline void
1449 __qdio_inbound_processing(struct qdio_q *q)
1450 {
1451 int q_laps=0;
1452
1453 QDIO_DBF_TEXT4(0,trace,"qinproc");
1454 QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
1455
1456 if (unlikely(qdio_reserve_q(q))) {
1457 qdio_release_q(q);
1458 #ifdef QDIO_PERFORMANCE_STATS
1459 i_p_c++;
1460 #endif /* QDIO_PERFORMANCE_STATS */
1461 /* as we're sissies, we'll check next time */
1462 if (likely(!atomic_read(&q->is_in_shutdown))) {
1463 qdio_mark_q(q);
1464 QDIO_DBF_TEXT4(0,trace,"busy,agn");
1465 }
1466 return;
1467 }
1468 #ifdef QDIO_PERFORMANCE_STATS
1469 i_p_nc++;
1470 perf_stats.tl_runs++;
1471 #endif /* QDIO_PERFORMANCE_STATS */
1472
1473 again:
1474 if (qdio_has_inbound_q_moved(q)) {
1475 qdio_kick_inbound_handler(q);
1476 if (!qdio_stop_polling(q)) {
1477 q_laps++;
1478 if (q_laps<QDIO_Q_LAPS)
1479 goto again;
1480 }
1481 qdio_mark_q(q);
1482 } else {
1483 if (!qdio_is_inbound_q_done(q))
1484 /* means poll time is not yet over */
1485 qdio_mark_q(q);
1486 }
1487
1488 qdio_release_q(q);
1489 }
1490
1491 static void
1492 qdio_inbound_processing(struct qdio_q *q)
1493 {
1494 __qdio_inbound_processing(q);
1495 }
1496
1497 /************************* MAIN ROUTINES *******************************/
1498
1499 #ifdef QDIO_USE_PROCESSING_STATE
1500 static inline int
1501 tiqdio_reset_processing_state(struct qdio_q *q, int q_laps)
1502 {
1503 if (!q) {
1504 tiqdio_sched_tl();
1505 return 0;
1506 }
1507
1508 /*
1509 * under VM, we have not used the PROCESSING state, so no
1510 * need to stop polling
1511 */
1512 if (q->siga_sync)
1513 return 2;
1514
1515 if (unlikely(qdio_reserve_q(q))) {
1516 qdio_release_q(q);
1517 #ifdef QDIO_PERFORMANCE_STATS
1518 ii_p_c++;
1519 #endif /* QDIO_PERFORMANCE_STATS */
1520 /*
1521 * as we might just be about to stop polling, we make
1522 * sure that we check again at least once more
1523 */
1524
1525 /*
1526 * sanity -- we'd get here without setting the
1527 * dev st chg ind
1528 */
1529 tiqdio_set_summary_bit((__u32*)q->dev_st_chg_ind);
1530 tiqdio_sched_tl();
1531 return 0;
1532 }
1533 if (qdio_stop_polling(q)) {
1534 qdio_release_q(q);
1535 return 2;
1536 }
1537 if (q_laps<QDIO_Q_LAPS-1) {
1538 qdio_release_q(q);
1539 return 3;
1540 }
1541 /*
1542 * we set the flags to get into the stuff
1543 * next time, see also comment in qdio_stop_polling
1544 */
1545 tiqdio_set_summary_bit((__u32*)q->dev_st_chg_ind);
1546 tiqdio_sched_tl();
1547 qdio_release_q(q);
1548 return 1;
1549
1550 }
1551 #endif /* QDIO_USE_PROCESSING_STATE */
1552
1553 static inline void
1554 tiqdio_inbound_checks(void)
1555 {
1556 struct qdio_q *q;
1557 int spare_ind_was_set=0;
1558 #ifdef QDIO_USE_PROCESSING_STATE
1559 int q_laps=0;
1560 #endif /* QDIO_USE_PROCESSING_STATE */
1561
1562 QDIO_DBF_TEXT4(0,trace,"iqdinbck");
1563 QDIO_DBF_TEXT5(0,trace,"iqlocsum");
1564
1565 #ifdef QDIO_USE_PROCESSING_STATE
1566 again:
1567 #endif /* QDIO_USE_PROCESSING_STATE */
1568
1569 /* when the spare indicator is used and set, save that and clear it */
1570 if ((atomic_read(&spare_indicator_usecount)) && spare_indicator) {
1571 spare_ind_was_set = 1;
1572 tiqdio_clear_summary_bit((__u32*)&spare_indicator);
1573 }
1574
1575 q=(struct qdio_q*)tiq_list;
1576 do {
1577 if (!q)
1578 break;
1579 __tiqdio_inbound_processing(q, spare_ind_was_set);
1580 q=(struct qdio_q*)q->list_next;
1581 } while (q!=(struct qdio_q*)tiq_list);
1582
1583 #ifdef QDIO_USE_PROCESSING_STATE
1584 q=(struct qdio_q*)tiq_list;
1585 do {
1586 int ret;
1587
1588 ret = tiqdio_reset_processing_state(q, q_laps);
1589 switch (ret) {
1590 case 0:
1591 return;
1592 case 1:
1593 q_laps++;
1594 case 2:
1595 q = (struct qdio_q*)q->list_next;
1596 break;
1597 default:
1598 q_laps++;
1599 goto again;
1600 }
1601 } while (q!=(struct qdio_q*)tiq_list);
1602 #endif /* QDIO_USE_PROCESSING_STATE */
1603 }
1604
1605 static void
1606 tiqdio_tl(unsigned long data)
1607 {
1608 QDIO_DBF_TEXT4(0,trace,"iqdio_tl");
1609
1610 #ifdef QDIO_PERFORMANCE_STATS
1611 perf_stats.tl_runs++;
1612 #endif /* QDIO_PERFORMANCE_STATS */
1613
1614 tiqdio_inbound_checks();
1615 }
1616
1617 /********************* GENERAL HELPER_ROUTINES ***********************/
1618
1619 static void
1620 qdio_release_irq_memory(struct qdio_irq *irq_ptr)
1621 {
1622 int i;
1623
1624 for (i=0;i<QDIO_MAX_QUEUES_PER_IRQ;i++) {
1625 if (!irq_ptr->input_qs[i])
1626 goto next;
1627
1628 kfree(irq_ptr->input_qs[i]->slib);
1629 kfree(irq_ptr->input_qs[i]);
1630
1631 next:
1632 if (!irq_ptr->output_qs[i])
1633 continue;
1634
1635 kfree(irq_ptr->output_qs[i]->slib);
1636 kfree(irq_ptr->output_qs[i]);
1637
1638 }
1639 kfree(irq_ptr->qdr);
1640 kfree(irq_ptr);
1641 }
1642
1643 static void
1644 qdio_set_impl_params(struct qdio_irq *irq_ptr,
1645 unsigned int qib_param_field_format,
1646 /* pointer to 128 bytes or NULL, if no param field */
1647 unsigned char *qib_param_field,
1648 /* pointer to no_queues*128 words of data or NULL */
1649 unsigned int no_input_qs,
1650 unsigned int no_output_qs,
1651 unsigned long *input_slib_elements,
1652 unsigned long *output_slib_elements)
1653 {
1654 int i,j;
1655
1656 if (!irq_ptr)
1657 return;
1658
1659 irq_ptr->qib.pfmt=qib_param_field_format;
1660 if (qib_param_field)
1661 memcpy(irq_ptr->qib.parm,qib_param_field,
1662 QDIO_MAX_BUFFERS_PER_Q);
1663
1664 if (input_slib_elements)
1665 for (i=0;i<no_input_qs;i++) {
1666 for (j=0;j<QDIO_MAX_BUFFERS_PER_Q;j++)
1667 irq_ptr->input_qs[i]->slib->slibe[j].parms=
1668 input_slib_elements[
1669 i*QDIO_MAX_BUFFERS_PER_Q+j];
1670 }
1671 if (output_slib_elements)
1672 for (i=0;i<no_output_qs;i++) {
1673 for (j=0;j<QDIO_MAX_BUFFERS_PER_Q;j++)
1674 irq_ptr->output_qs[i]->slib->slibe[j].parms=
1675 output_slib_elements[
1676 i*QDIO_MAX_BUFFERS_PER_Q+j];
1677 }
1678 }
1679
1680 static int
1681 qdio_alloc_qs(struct qdio_irq *irq_ptr,
1682 int no_input_qs, int no_output_qs)
1683 {
1684 int i;
1685 struct qdio_q *q;
1686 int result=-ENOMEM;
1687
1688 for (i=0;i<no_input_qs;i++) {
1689 q = kzalloc(sizeof(struct qdio_q), GFP_KERNEL);
1690
1691 if (!q) {
1692 QDIO_PRINT_ERR("kmalloc of q failed!\n");
1693 goto out;
1694 }
1695
1696 q->slib = kmalloc(PAGE_SIZE, GFP_KERNEL);
1697 if (!q->slib) {
1698 QDIO_PRINT_ERR("kmalloc of slib failed!\n");
1699 goto out;
1700 }
1701
1702 irq_ptr->input_qs[i]=q;
1703 }
1704
1705 for (i=0;i<no_output_qs;i++) {
1706 q = kzalloc(sizeof(struct qdio_q), GFP_KERNEL);
1707
1708 if (!q) {
1709 goto out;
1710 }
1711
1712 q->slib=kmalloc(PAGE_SIZE,GFP_KERNEL);
1713 if (!q->slib) {
1714 QDIO_PRINT_ERR("kmalloc of slib failed!\n");
1715 goto out;
1716 }
1717
1718 irq_ptr->output_qs[i]=q;
1719 }
1720
1721 result=0;
1722 out:
1723 return result;
1724 }
1725
1726 static void
1727 qdio_fill_qs(struct qdio_irq *irq_ptr, struct ccw_device *cdev,
1728 int no_input_qs, int no_output_qs,
1729 qdio_handler_t *input_handler,
1730 qdio_handler_t *output_handler,
1731 unsigned long int_parm,int q_format,
1732 unsigned long flags,
1733 void **inbound_sbals_array,
1734 void **outbound_sbals_array)
1735 {
1736 struct qdio_q *q;
1737 int i,j;
1738 char dbf_text[20]; /* see qdio_initialize */
1739 void *ptr;
1740 int available;
1741
1742 sprintf(dbf_text,"qfqs%4x",cdev->private->sch_no);
1743 QDIO_DBF_TEXT0(0,setup,dbf_text);
1744 for (i=0;i<no_input_qs;i++) {
1745 q=irq_ptr->input_qs[i];
1746
1747 memset(q,0,((char*)&q->slib)-((char*)q));
1748 sprintf(dbf_text,"in-q%4x",i);
1749 QDIO_DBF_TEXT0(0,setup,dbf_text);
1750 QDIO_DBF_HEX0(0,setup,&q,sizeof(void*));
1751
1752 memset(q->slib,0,PAGE_SIZE);
1753 q->sl=(struct sl*)(((char*)q->slib)+PAGE_SIZE/2);
1754
1755 available=0;
1756
1757 for (j=0;j<QDIO_MAX_BUFFERS_PER_Q;j++)
1758 q->sbal[j]=*(inbound_sbals_array++);
1759
1760 q->queue_type=q_format;
1761 q->int_parm=int_parm;
1762 q->schid = irq_ptr->schid;
1763 q->irq_ptr = irq_ptr;
1764 q->cdev = cdev;
1765 q->mask=1<<(31-i);
1766 q->q_no=i;
1767 q->is_input_q=1;
1768 q->first_to_check=0;
1769 q->last_move_ftc=0;
1770 q->handler=input_handler;
1771 q->dev_st_chg_ind=irq_ptr->dev_st_chg_ind;
1772
1773 q->tasklet.data=(unsigned long)q;
1774 /* q->is_thinint_q isn't valid at this time, but
1775 * irq_ptr->is_thinint_irq is */
1776 q->tasklet.func=(void(*)(unsigned long))
1777 ((irq_ptr->is_thinint_irq)?&tiqdio_inbound_processing:
1778 &qdio_inbound_processing);
1779
1780 /* actually this is not used for inbound queues. yet. */
1781 atomic_set(&q->busy_siga_counter,0);
1782 q->timing.busy_start=0;
1783
1784 /* for (j=0;j<QDIO_STATS_NUMBER;j++)
1785 q->timing.last_transfer_times[j]=(qdio_get_micros()/
1786 QDIO_STATS_NUMBER)*j;
1787 q->timing.last_transfer_index=QDIO_STATS_NUMBER-1;
1788 */
1789
1790 /* fill in slib */
1791 if (i>0) irq_ptr->input_qs[i-1]->slib->nsliba=
1792 (unsigned long)(q->slib);
1793 q->slib->sla=(unsigned long)(q->sl);
1794 q->slib->slsba=(unsigned long)(&q->slsb.acc.val[0]);
1795
1796 /* fill in sl */
1797 for (j=0;j<QDIO_MAX_BUFFERS_PER_Q;j++)
1798 q->sl->element[j].sbal=(unsigned long)(q->sbal[j]);
1799
1800 QDIO_DBF_TEXT2(0,setup,"sl-sb-b0");
1801 ptr=(void*)q->sl;
1802 QDIO_DBF_HEX2(0,setup,&ptr,sizeof(void*));
1803 ptr=(void*)&q->slsb;
1804 QDIO_DBF_HEX2(0,setup,&ptr,sizeof(void*));
1805 ptr=(void*)q->sbal[0];
1806 QDIO_DBF_HEX2(0,setup,&ptr,sizeof(void*));
1807
1808 /* fill in slsb */
1809 if (!irq_ptr->is_qebsm) {
1810 unsigned int count = 1;
1811 for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; j++)
1812 set_slsb(q, &j, SLSB_P_INPUT_NOT_INIT, &count);
1813 }
1814 }
1815
1816 for (i=0;i<no_output_qs;i++) {
1817 q=irq_ptr->output_qs[i];
1818 memset(q,0,((char*)&q->slib)-((char*)q));
1819
1820 sprintf(dbf_text,"outq%4x",i);
1821 QDIO_DBF_TEXT0(0,setup,dbf_text);
1822 QDIO_DBF_HEX0(0,setup,&q,sizeof(void*));
1823
1824 memset(q->slib,0,PAGE_SIZE);
1825 q->sl=(struct sl*)(((char*)q->slib)+PAGE_SIZE/2);
1826
1827 available=0;
1828
1829 for (j=0;j<QDIO_MAX_BUFFERS_PER_Q;j++)
1830 q->sbal[j]=*(outbound_sbals_array++);
1831
1832 q->queue_type=q_format;
1833 q->int_parm=int_parm;
1834 q->is_input_q=0;
1835 q->schid = irq_ptr->schid;
1836 q->cdev = cdev;
1837 q->irq_ptr = irq_ptr;
1838 q->mask=1<<(31-i);
1839 q->q_no=i;
1840 q->first_to_check=0;
1841 q->last_move_ftc=0;
1842 q->handler=output_handler;
1843
1844 q->tasklet.data=(unsigned long)q;
1845 q->tasklet.func=(void(*)(unsigned long))
1846 &qdio_outbound_processing;
1847
1848 atomic_set(&q->busy_siga_counter,0);
1849 q->timing.busy_start=0;
1850
1851 /* fill in slib */
1852 if (i>0) irq_ptr->output_qs[i-1]->slib->nsliba=
1853 (unsigned long)(q->slib);
1854 q->slib->sla=(unsigned long)(q->sl);
1855 q->slib->slsba=(unsigned long)(&q->slsb.acc.val[0]);
1856
1857 /* fill in sl */
1858 for (j=0;j<QDIO_MAX_BUFFERS_PER_Q;j++)
1859 q->sl->element[j].sbal=(unsigned long)(q->sbal[j]);
1860
1861 QDIO_DBF_TEXT2(0,setup,"sl-sb-b0");
1862 ptr=(void*)q->sl;
1863 QDIO_DBF_HEX2(0,setup,&ptr,sizeof(void*));
1864 ptr=(void*)&q->slsb;
1865 QDIO_DBF_HEX2(0,setup,&ptr,sizeof(void*));
1866 ptr=(void*)q->sbal[0];
1867 QDIO_DBF_HEX2(0,setup,&ptr,sizeof(void*));
1868
1869 /* fill in slsb */
1870 if (!irq_ptr->is_qebsm) {
1871 unsigned int count = 1;
1872 for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; j++)
1873 set_slsb(q, &j, SLSB_P_OUTPUT_NOT_INIT, &count);
1874 }
1875 }
1876 }
1877
1878 static void
1879 qdio_fill_thresholds(struct qdio_irq *irq_ptr,
1880 unsigned int no_input_qs,
1881 unsigned int no_output_qs,
1882 unsigned int min_input_threshold,
1883 unsigned int max_input_threshold,
1884 unsigned int min_output_threshold,
1885 unsigned int max_output_threshold)
1886 {
1887 int i;
1888 struct qdio_q *q;
1889
1890 for (i=0;i<no_input_qs;i++) {
1891 q=irq_ptr->input_qs[i];
1892 q->timing.threshold=max_input_threshold;
1893 /* for (j=0;j<QDIO_STATS_CLASSES;j++) {
1894 q->threshold_classes[j].threshold=
1895 min_input_threshold+
1896 (max_input_threshold-min_input_threshold)/
1897 QDIO_STATS_CLASSES;
1898 }
1899 qdio_use_thresholds(q,QDIO_STATS_CLASSES/2);*/
1900 }
1901 for (i=0;i<no_output_qs;i++) {
1902 q=irq_ptr->output_qs[i];
1903 q->timing.threshold=max_output_threshold;
1904 /* for (j=0;j<QDIO_STATS_CLASSES;j++) {
1905 q->threshold_classes[j].threshold=
1906 min_output_threshold+
1907 (max_output_threshold-min_output_threshold)/
1908 QDIO_STATS_CLASSES;
1909 }
1910 qdio_use_thresholds(q,QDIO_STATS_CLASSES/2);*/
1911 }
1912 }
1913
1914 static int
1915 tiqdio_thinint_handler(void)
1916 {
1917 QDIO_DBF_TEXT4(0,trace,"thin_int");
1918
1919 #ifdef QDIO_PERFORMANCE_STATS
1920 perf_stats.thinints++;
1921 perf_stats.start_time_inbound=NOW;
1922 #endif /* QDIO_PERFORMANCE_STATS */
1923
1924 /* SVS only when needed:
1925 * issue SVS to benefit from iqdio interrupt avoidance
1926 * (SVS clears AISOI)*/
1927 if (!omit_svs)
1928 tiqdio_clear_global_summary();
1929
1930 tiqdio_inbound_checks();
1931 return 0;
1932 }
1933
1934 static void
1935 qdio_set_state(struct qdio_irq *irq_ptr, enum qdio_irq_states state)
1936 {
1937 int i;
1938 #ifdef CONFIG_QDIO_DEBUG
1939 char dbf_text[15];
1940
1941 QDIO_DBF_TEXT5(0,trace,"newstate");
1942 sprintf(dbf_text,"%4x%4x",irq_ptr->schid.sch_no,state);
1943 QDIO_DBF_TEXT5(0,trace,dbf_text);
1944 #endif /* CONFIG_QDIO_DEBUG */
1945
1946 irq_ptr->state=state;
1947 for (i=0;i<irq_ptr->no_input_qs;i++)
1948 irq_ptr->input_qs[i]->state=state;
1949 for (i=0;i<irq_ptr->no_output_qs;i++)
1950 irq_ptr->output_qs[i]->state=state;
1951 mb();
1952 }
1953
1954 static inline void
1955 qdio_irq_check_sense(struct subchannel_id schid, struct irb *irb)
1956 {
1957 char dbf_text[15];
1958
1959 if (irb->esw.esw0.erw.cons) {
1960 sprintf(dbf_text,"sens%4x",schid.sch_no);
1961 QDIO_DBF_TEXT2(1,trace,dbf_text);
1962 QDIO_DBF_HEX0(0,sense,irb,QDIO_DBF_SENSE_LEN);
1963
1964 QDIO_PRINT_WARN("sense data available on qdio channel.\n");
1965 HEXDUMP16(WARN,"irb: ",irb);
1966 HEXDUMP16(WARN,"sense data: ",irb->ecw);
1967 }
1968
1969 }
1970
1971 static inline void
1972 qdio_handle_pci(struct qdio_irq *irq_ptr)
1973 {
1974 int i;
1975 struct qdio_q *q;
1976
1977 #ifdef QDIO_PERFORMANCE_STATS
1978 perf_stats.pcis++;
1979 perf_stats.start_time_inbound=NOW;
1980 #endif /* QDIO_PERFORMANCE_STATS */
1981 for (i=0;i<irq_ptr->no_input_qs;i++) {
1982 q=irq_ptr->input_qs[i];
1983 if (q->is_input_q&QDIO_FLAG_NO_INPUT_INTERRUPT_CONTEXT)
1984 qdio_mark_q(q);
1985 else {
1986 #ifdef QDIO_PERFORMANCE_STATS
1987 perf_stats.tl_runs--;
1988 #endif /* QDIO_PERFORMANCE_STATS */
1989 __qdio_inbound_processing(q);
1990 }
1991 }
1992 if (!irq_ptr->hydra_gives_outbound_pcis)
1993 return;
1994 for (i=0;i<irq_ptr->no_output_qs;i++) {
1995 q=irq_ptr->output_qs[i];
1996 #ifdef QDIO_PERFORMANCE_STATS
1997 perf_stats.tl_runs--;
1998 #endif /* QDIO_PERFORMANCE_STATS */
1999 if (qdio_is_outbound_q_done(q))
2000 continue;
2001 if (!irq_ptr->sync_done_on_outb_pcis)
2002 SYNC_MEMORY;
2003 __qdio_outbound_processing(q);
2004 }
2005 }
2006
2007 static void qdio_establish_handle_irq(struct ccw_device*, int, int);
2008
2009 static inline void
2010 qdio_handle_activate_check(struct ccw_device *cdev, unsigned long intparm,
2011 int cstat, int dstat)
2012 {
2013 struct qdio_irq *irq_ptr;
2014 struct qdio_q *q;
2015 char dbf_text[15];
2016
2017 irq_ptr = cdev->private->qdio_data;
2018
2019 QDIO_DBF_TEXT2(1, trace, "ick2");
2020 sprintf(dbf_text,"%s", cdev->dev.bus_id);
2021 QDIO_DBF_TEXT2(1,trace,dbf_text);
2022 QDIO_DBF_HEX2(0,trace,&intparm,sizeof(int));
2023 QDIO_DBF_HEX2(0,trace,&dstat,sizeof(int));
2024 QDIO_DBF_HEX2(0,trace,&cstat,sizeof(int));
2025 QDIO_PRINT_ERR("received check condition on activate " \
2026 "queues on device %s (cs=x%x, ds=x%x).\n",
2027 cdev->dev.bus_id, cstat, dstat);
2028 if (irq_ptr->no_input_qs) {
2029 q=irq_ptr->input_qs[0];
2030 } else if (irq_ptr->no_output_qs) {
2031 q=irq_ptr->output_qs[0];
2032 } else {
2033 QDIO_PRINT_ERR("oops... no queue registered for device %s!?\n",
2034 cdev->dev.bus_id);
2035 goto omit_handler_call;
2036 }
2037 q->handler(q->cdev,QDIO_STATUS_ACTIVATE_CHECK_CONDITION|
2038 QDIO_STATUS_LOOK_FOR_ERROR,
2039 0,0,0,-1,-1,q->int_parm);
2040 omit_handler_call:
2041 qdio_set_state(irq_ptr,QDIO_IRQ_STATE_STOPPED);
2042
2043 }
2044
2045 static void
2046 qdio_call_shutdown(void *data)
2047 {
2048 struct ccw_device *cdev;
2049
2050 cdev = (struct ccw_device *)data;
2051 qdio_shutdown(cdev, QDIO_FLAG_CLEANUP_USING_CLEAR);
2052 put_device(&cdev->dev);
2053 }
2054
2055 static void
2056 qdio_timeout_handler(struct ccw_device *cdev)
2057 {
2058 struct qdio_irq *irq_ptr;
2059 char dbf_text[15];
2060
2061 QDIO_DBF_TEXT2(0, trace, "qtoh");
2062 sprintf(dbf_text, "%s", cdev->dev.bus_id);
2063 QDIO_DBF_TEXT2(0, trace, dbf_text);
2064
2065 irq_ptr = cdev->private->qdio_data;
2066 sprintf(dbf_text, "state:%d", irq_ptr->state);
2067 QDIO_DBF_TEXT2(0, trace, dbf_text);
2068
2069 switch (irq_ptr->state) {
2070 case QDIO_IRQ_STATE_INACTIVE:
2071 QDIO_PRINT_ERR("establish queues on irq 0.%x.%04x: timed out\n",
2072 irq_ptr->schid.ssid, irq_ptr->schid.sch_no);
2073 QDIO_DBF_TEXT2(1,setup,"eq:timeo");
2074 qdio_set_state(irq_ptr, QDIO_IRQ_STATE_ERR);
2075 break;
2076 case QDIO_IRQ_STATE_CLEANUP:
2077 QDIO_PRINT_INFO("Did not get interrupt on cleanup, "
2078 "irq=0.%x.%x.\n",
2079 irq_ptr->schid.ssid, irq_ptr->schid.sch_no);
2080 qdio_set_state(irq_ptr, QDIO_IRQ_STATE_ERR);
2081 break;
2082 case QDIO_IRQ_STATE_ESTABLISHED:
2083 case QDIO_IRQ_STATE_ACTIVE:
2084 /* I/O has been terminated by common I/O layer. */
2085 QDIO_PRINT_INFO("Queues on irq 0.%x.%04x killed by cio.\n",
2086 irq_ptr->schid.ssid, irq_ptr->schid.sch_no);
2087 QDIO_DBF_TEXT2(1, trace, "cio:term");
2088 qdio_set_state(irq_ptr, QDIO_IRQ_STATE_STOPPED);
2089 if (get_device(&cdev->dev)) {
2090 /* Can't call shutdown from interrupt context. */
2091 PREPARE_WORK(&cdev->private->kick_work,
2092 qdio_call_shutdown, (void *)cdev);
2093 queue_work(ccw_device_work, &cdev->private->kick_work);
2094 }
2095 break;
2096 default:
2097 BUG();
2098 }
2099 ccw_device_set_timeout(cdev, 0);
2100 wake_up(&cdev->private->wait_q);
2101 }
2102
2103 static void
2104 qdio_handler(struct ccw_device *cdev, unsigned long intparm, struct irb *irb)
2105 {
2106 struct qdio_irq *irq_ptr;
2107 int cstat,dstat;
2108 char dbf_text[15];
2109
2110 #ifdef CONFIG_QDIO_DEBUG
2111 QDIO_DBF_TEXT4(0, trace, "qint");
2112 sprintf(dbf_text, "%s", cdev->dev.bus_id);
2113 QDIO_DBF_TEXT4(0, trace, dbf_text);
2114 #endif /* CONFIG_QDIO_DEBUG */
2115
2116 if (!intparm) {
2117 QDIO_PRINT_ERR("got unsolicited interrupt in qdio " \
2118 "handler, device %s\n", cdev->dev.bus_id);
2119 return;
2120 }
2121
2122 irq_ptr = cdev->private->qdio_data;
2123 if (!irq_ptr) {
2124 QDIO_DBF_TEXT2(1, trace, "uint");
2125 sprintf(dbf_text,"%s", cdev->dev.bus_id);
2126 QDIO_DBF_TEXT2(1,trace,dbf_text);
2127 QDIO_PRINT_ERR("received interrupt on unused device %s!\n",
2128 cdev->dev.bus_id);
2129 return;
2130 }
2131
2132 if (IS_ERR(irb)) {
2133 /* Currently running i/o is in error. */
2134 switch (PTR_ERR(irb)) {
2135 case -EIO:
2136 QDIO_PRINT_ERR("i/o error on device %s\n",
2137 cdev->dev.bus_id);
2138 return;
2139 case -ETIMEDOUT:
2140 qdio_timeout_handler(cdev);
2141 return;
2142 default:
2143 QDIO_PRINT_ERR("unknown error state %ld on device %s\n",
2144 PTR_ERR(irb), cdev->dev.bus_id);
2145 return;
2146 }
2147 }
2148
2149 qdio_irq_check_sense(irq_ptr->schid, irb);
2150
2151 #ifdef CONFIG_QDIO_DEBUG
2152 sprintf(dbf_text, "state:%d", irq_ptr->state);
2153 QDIO_DBF_TEXT4(0, trace, dbf_text);
2154 #endif /* CONFIG_QDIO_DEBUG */
2155
2156 cstat = irb->scsw.cstat;
2157 dstat = irb->scsw.dstat;
2158
2159 switch (irq_ptr->state) {
2160 case QDIO_IRQ_STATE_INACTIVE:
2161 qdio_establish_handle_irq(cdev, cstat, dstat);
2162 break;
2163
2164 case QDIO_IRQ_STATE_CLEANUP:
2165 qdio_set_state(irq_ptr, QDIO_IRQ_STATE_INACTIVE);
2166 break;
2167
2168 case QDIO_IRQ_STATE_ESTABLISHED:
2169 case QDIO_IRQ_STATE_ACTIVE:
2170 if (cstat & SCHN_STAT_PCI) {
2171 qdio_handle_pci(irq_ptr);
2172 break;
2173 }
2174
2175 if ((cstat&~SCHN_STAT_PCI)||dstat) {
2176 qdio_handle_activate_check(cdev, intparm, cstat, dstat);
2177 break;
2178 }
2179 default:
2180 QDIO_PRINT_ERR("got interrupt for queues in state %d on " \
2181 "device %s?!\n",
2182 irq_ptr->state, cdev->dev.bus_id);
2183 }
2184 wake_up(&cdev->private->wait_q);
2185
2186 }
2187
2188 int
2189 qdio_synchronize(struct ccw_device *cdev, unsigned int flags,
2190 unsigned int queue_number)
2191 {
2192 int cc = 0;
2193 struct qdio_q *q;
2194 struct qdio_irq *irq_ptr;
2195 void *ptr;
2196 #ifdef CONFIG_QDIO_DEBUG
2197 char dbf_text[15]="SyncXXXX";
2198 #endif
2199
2200 irq_ptr = cdev->private->qdio_data;
2201 if (!irq_ptr)
2202 return -ENODEV;
2203
2204 #ifdef CONFIG_QDIO_DEBUG
2205 *((int*)(&dbf_text[4])) = irq_ptr->schid.sch_no;
2206 QDIO_DBF_HEX4(0,trace,dbf_text,QDIO_DBF_TRACE_LEN);
2207 *((int*)(&dbf_text[0]))=flags;
2208 *((int*)(&dbf_text[4]))=queue_number;
2209 QDIO_DBF_HEX4(0,trace,dbf_text,QDIO_DBF_TRACE_LEN);
2210 #endif /* CONFIG_QDIO_DEBUG */
2211
2212 if (flags&QDIO_FLAG_SYNC_INPUT) {
2213 q=irq_ptr->input_qs[queue_number];
2214 if (!q)
2215 return -EINVAL;
2216 if (!(irq_ptr->is_qebsm))
2217 cc = do_siga_sync(q->schid, 0, q->mask);
2218 } else if (flags&QDIO_FLAG_SYNC_OUTPUT) {
2219 q=irq_ptr->output_qs[queue_number];
2220 if (!q)
2221 return -EINVAL;
2222 if (!(irq_ptr->is_qebsm))
2223 cc = do_siga_sync(q->schid, q->mask, 0);
2224 } else
2225 return -EINVAL;
2226
2227 ptr=&cc;
2228 if (cc)
2229 QDIO_DBF_HEX3(0,trace,&ptr,sizeof(int));
2230
2231 return cc;
2232 }
2233
2234 static inline void
2235 qdio_check_subchannel_qebsm(struct qdio_irq *irq_ptr, unsigned char qdioac,
2236 unsigned long token)
2237 {
2238 struct qdio_q *q;
2239 int i;
2240 unsigned int count, start_buf;
2241 char dbf_text[15];
2242
2243 /*check if QEBSM is disabled */
2244 if (!(irq_ptr->is_qebsm) || !(qdioac & 0x01)) {
2245 irq_ptr->is_qebsm = 0;
2246 irq_ptr->sch_token = 0;
2247 irq_ptr->qib.rflags &= ~QIB_RFLAGS_ENABLE_QEBSM;
2248 QDIO_DBF_TEXT0(0,setup,"noV=V");
2249 return;
2250 }
2251 irq_ptr->sch_token = token;
2252 /*input queue*/
2253 for (i = 0; i < irq_ptr->no_input_qs;i++) {
2254 q = irq_ptr->input_qs[i];
2255 count = QDIO_MAX_BUFFERS_PER_Q;
2256 start_buf = 0;
2257 set_slsb(q, &start_buf, SLSB_P_INPUT_NOT_INIT, &count);
2258 }
2259 sprintf(dbf_text,"V=V:%2x",irq_ptr->is_qebsm);
2260 QDIO_DBF_TEXT0(0,setup,dbf_text);
2261 sprintf(dbf_text,"%8lx",irq_ptr->sch_token);
2262 QDIO_DBF_TEXT0(0,setup,dbf_text);
2263 /*output queue*/
2264 for (i = 0; i < irq_ptr->no_output_qs; i++) {
2265 q = irq_ptr->output_qs[i];
2266 count = QDIO_MAX_BUFFERS_PER_Q;
2267 start_buf = 0;
2268 set_slsb(q, &start_buf, SLSB_P_OUTPUT_NOT_INIT, &count);
2269 }
2270 }
2271
2272 static void
2273 qdio_get_ssqd_information(struct qdio_irq *irq_ptr)
2274 {
2275 int result;
2276 unsigned char qdioac;
2277 struct {
2278 struct chsc_header request;
2279 u16 reserved1:10;
2280 u16 ssid:2;
2281 u16 fmt:4;
2282 u16 first_sch;
2283 u16 reserved2;
2284 u16 last_sch;
2285 u32 reserved3;
2286 struct chsc_header response;
2287 u32 reserved4;
2288 u8 flags;
2289 u8 reserved5;
2290 u16 sch;
2291 u8 qfmt;
2292 u8 parm;
2293 u8 qdioac1;
2294 u8 sch_class;
2295 u8 reserved7;
2296 u8 icnt;
2297 u8 reserved8;
2298 u8 ocnt;
2299 u8 reserved9;
2300 u8 mbccnt;
2301 u16 qdioac2;
2302 u64 sch_token;
2303 } *ssqd_area;
2304
2305 QDIO_DBF_TEXT0(0,setup,"getssqd");
2306 qdioac = 0;
2307 ssqd_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA);
2308 if (!ssqd_area) {
2309 QDIO_PRINT_WARN("Could not get memory for chsc. Using all " \
2310 "SIGAs for sch x%x.\n", irq_ptr->schid.sch_no);
2311 irq_ptr->qdioac = CHSC_FLAG_SIGA_INPUT_NECESSARY ||
2312 CHSC_FLAG_SIGA_OUTPUT_NECESSARY ||
2313 CHSC_FLAG_SIGA_SYNC_NECESSARY; /* all flags set */
2314 irq_ptr->is_qebsm = 0;
2315 irq_ptr->sch_token = 0;
2316 irq_ptr->qib.rflags &= ~QIB_RFLAGS_ENABLE_QEBSM;
2317 return;
2318 }
2319
2320 ssqd_area->request = (struct chsc_header) {
2321 .length = 0x0010,
2322 .code = 0x0024,
2323 };
2324 ssqd_area->first_sch = irq_ptr->schid.sch_no;
2325 ssqd_area->last_sch = irq_ptr->schid.sch_no;
2326 ssqd_area->ssid = irq_ptr->schid.ssid;
2327 result = chsc(ssqd_area);
2328
2329 if (result) {
2330 QDIO_PRINT_WARN("CHSC returned cc %i. Using all " \
2331 "SIGAs for sch 0.%x.%x.\n", result,
2332 irq_ptr->schid.ssid, irq_ptr->schid.sch_no);
2333 qdioac = CHSC_FLAG_SIGA_INPUT_NECESSARY ||
2334 CHSC_FLAG_SIGA_OUTPUT_NECESSARY ||
2335 CHSC_FLAG_SIGA_SYNC_NECESSARY; /* all flags set */
2336 irq_ptr->is_qebsm = 0;
2337 goto out;
2338 }
2339
2340 if (ssqd_area->response.code != QDIO_CHSC_RESPONSE_CODE_OK) {
2341 QDIO_PRINT_WARN("response upon checking SIGA needs " \
2342 "is 0x%x. Using all SIGAs for sch 0.%x.%x.\n",
2343 ssqd_area->response.code,
2344 irq_ptr->schid.ssid, irq_ptr->schid.sch_no);
2345 qdioac = CHSC_FLAG_SIGA_INPUT_NECESSARY ||
2346 CHSC_FLAG_SIGA_OUTPUT_NECESSARY ||
2347 CHSC_FLAG_SIGA_SYNC_NECESSARY; /* all flags set */
2348 irq_ptr->is_qebsm = 0;
2349 goto out;
2350 }
2351 if (!(ssqd_area->flags & CHSC_FLAG_QDIO_CAPABILITY) ||
2352 !(ssqd_area->flags & CHSC_FLAG_VALIDITY) ||
2353 (ssqd_area->sch != irq_ptr->schid.sch_no)) {
2354 QDIO_PRINT_WARN("huh? problems checking out sch 0.%x.%x... " \
2355 "using all SIGAs.\n",
2356 irq_ptr->schid.ssid, irq_ptr->schid.sch_no);
2357 qdioac = CHSC_FLAG_SIGA_INPUT_NECESSARY |
2358 CHSC_FLAG_SIGA_OUTPUT_NECESSARY |
2359 CHSC_FLAG_SIGA_SYNC_NECESSARY; /* worst case */
2360 irq_ptr->is_qebsm = 0;
2361 goto out;
2362 }
2363 qdioac = ssqd_area->qdioac1;
2364 out:
2365 qdio_check_subchannel_qebsm(irq_ptr, qdioac,
2366 ssqd_area->sch_token);
2367 free_page ((unsigned long) ssqd_area);
2368 irq_ptr->qdioac = qdioac;
2369 }
2370
2371 static unsigned int
2372 tiqdio_check_chsc_availability(void)
2373 {
2374 char dbf_text[15];
2375
2376 if (!css_characteristics_avail)
2377 return -EIO;
2378
2379 /* Check for bit 41. */
2380 if (!css_general_characteristics.aif) {
2381 QDIO_PRINT_WARN("Adapter interruption facility not " \
2382 "installed.\n");
2383 return -ENOENT;
2384 }
2385
2386 /* Check for bits 107 and 108. */
2387 if (!css_chsc_characteristics.scssc ||
2388 !css_chsc_characteristics.scsscf) {
2389 QDIO_PRINT_WARN("Set Chan Subsys. Char. & Fast-CHSCs " \
2390 "not available.\n");
2391 return -ENOENT;
2392 }
2393
2394 /* Check for OSA/FCP thin interrupts (bit 67). */
2395 hydra_thinints = css_general_characteristics.aif_osa;
2396 sprintf(dbf_text,"hydrati%1x", hydra_thinints);
2397 QDIO_DBF_TEXT0(0,setup,dbf_text);
2398
2399 #ifdef CONFIG_64BIT
2400 /* Check for QEBSM support in general (bit 58). */
2401 is_passthrough = css_general_characteristics.qebsm;
2402 #endif
2403 sprintf(dbf_text,"cssQBS:%1x", is_passthrough);
2404 QDIO_DBF_TEXT0(0,setup,dbf_text);
2405
2406 /* Check for aif time delay disablement fac (bit 56). If installed,
2407 * omit svs even under lpar (good point by rick again) */
2408 omit_svs = css_general_characteristics.aif_tdd;
2409 sprintf(dbf_text,"omitsvs%1x", omit_svs);
2410 QDIO_DBF_TEXT0(0,setup,dbf_text);
2411 return 0;
2412 }
2413
2414
2415 static unsigned int
2416 tiqdio_set_subchannel_ind(struct qdio_irq *irq_ptr, int reset_to_zero)
2417 {
2418 unsigned long real_addr_local_summary_bit;
2419 unsigned long real_addr_dev_st_chg_ind;
2420 void *ptr;
2421 char dbf_text[15];
2422
2423 unsigned int resp_code;
2424 int result;
2425
2426 struct {
2427 struct chsc_header request;
2428 u16 operation_code;
2429 u16 reserved1;
2430 u32 reserved2;
2431 u32 reserved3;
2432 u64 summary_indicator_addr;
2433 u64 subchannel_indicator_addr;
2434 u32 ks:4;
2435 u32 kc:4;
2436 u32 reserved4:21;
2437 u32 isc:3;
2438 u32 word_with_d_bit;
2439 /* set to 0x10000000 to enable
2440 * time delay disablement facility */
2441 u32 reserved5;
2442 struct subchannel_id schid;
2443 u32 reserved6[1004];
2444 struct chsc_header response;
2445 u32 reserved7;
2446 } *scssc_area;
2447
2448 if (!irq_ptr->is_thinint_irq)
2449 return -ENODEV;
2450
2451 if (reset_to_zero) {
2452 real_addr_local_summary_bit=0;
2453 real_addr_dev_st_chg_ind=0;
2454 } else {
2455 real_addr_local_summary_bit=
2456 virt_to_phys((volatile void *)indicators);
2457 real_addr_dev_st_chg_ind=
2458 virt_to_phys((volatile void *)irq_ptr->dev_st_chg_ind);
2459 }
2460
2461 scssc_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA);
2462 if (!scssc_area) {
2463 QDIO_PRINT_WARN("No memory for setting indicators on " \
2464 "subchannel 0.%x.%x.\n",
2465 irq_ptr->schid.ssid, irq_ptr->schid.sch_no);
2466 return -ENOMEM;
2467 }
2468 scssc_area->request = (struct chsc_header) {
2469 .length = 0x0fe0,
2470 .code = 0x0021,
2471 };
2472 scssc_area->operation_code = 0;
2473
2474 scssc_area->summary_indicator_addr = real_addr_local_summary_bit;
2475 scssc_area->subchannel_indicator_addr = real_addr_dev_st_chg_ind;
2476 scssc_area->ks = QDIO_STORAGE_KEY;
2477 scssc_area->kc = QDIO_STORAGE_KEY;
2478 scssc_area->isc = TIQDIO_THININT_ISC;
2479 scssc_area->schid = irq_ptr->schid;
2480 /* enables the time delay disablement facility. Don't care
2481 * whether it is really there (i.e. we haven't checked for
2482 * it) */
2483 if (css_general_characteristics.aif_tdd)
2484 scssc_area->word_with_d_bit = 0x10000000;
2485 else
2486 QDIO_PRINT_WARN("Time delay disablement facility " \
2487 "not available\n");
2488
2489 result = chsc(scssc_area);
2490 if (result) {
2491 QDIO_PRINT_WARN("could not set indicators on irq 0.%x.%x, " \
2492 "cc=%i.\n",
2493 irq_ptr->schid.ssid, irq_ptr->schid.sch_no,result);
2494 result = -EIO;
2495 goto out;
2496 }
2497
2498 resp_code = scssc_area->response.code;
2499 if (resp_code!=QDIO_CHSC_RESPONSE_CODE_OK) {
2500 QDIO_PRINT_WARN("response upon setting indicators " \
2501 "is 0x%x.\n",resp_code);
2502 sprintf(dbf_text,"sidR%4x",resp_code);
2503 QDIO_DBF_TEXT1(0,trace,dbf_text);
2504 QDIO_DBF_TEXT1(0,setup,dbf_text);
2505 ptr=&scssc_area->response;
2506 QDIO_DBF_HEX2(1,setup,&ptr,QDIO_DBF_SETUP_LEN);
2507 result = -EIO;
2508 goto out;
2509 }
2510
2511 QDIO_DBF_TEXT2(0,setup,"setscind");
2512 QDIO_DBF_HEX2(0,setup,&real_addr_local_summary_bit,
2513 sizeof(unsigned long));
2514 QDIO_DBF_HEX2(0,setup,&real_addr_dev_st_chg_ind,sizeof(unsigned long));
2515 result = 0;
2516 out:
2517 free_page ((unsigned long) scssc_area);
2518 return result;
2519
2520 }
2521
2522 static unsigned int
2523 tiqdio_set_delay_target(struct qdio_irq *irq_ptr, unsigned long delay_target)
2524 {
2525 unsigned int resp_code;
2526 int result;
2527 void *ptr;
2528 char dbf_text[15];
2529
2530 struct {
2531 struct chsc_header request;
2532 u16 operation_code;
2533 u16 reserved1;
2534 u32 reserved2;
2535 u32 reserved3;
2536 u32 reserved4[2];
2537 u32 delay_target;
2538 u32 reserved5[1009];
2539 struct chsc_header response;
2540 u32 reserved6;
2541 } *scsscf_area;
2542
2543 if (!irq_ptr->is_thinint_irq)
2544 return -ENODEV;
2545
2546 scsscf_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA);
2547 if (!scsscf_area) {
2548 QDIO_PRINT_WARN("No memory for setting delay target on " \
2549 "subchannel 0.%x.%x.\n",
2550 irq_ptr->schid.ssid, irq_ptr->schid.sch_no);
2551 return -ENOMEM;
2552 }
2553 scsscf_area->request = (struct chsc_header) {
2554 .length = 0x0fe0,
2555 .code = 0x1027,
2556 };
2557
2558 scsscf_area->delay_target = delay_target<<16;
2559
2560 result=chsc(scsscf_area);
2561 if (result) {
2562 QDIO_PRINT_WARN("could not set delay target on irq 0.%x.%x, " \
2563 "cc=%i. Continuing.\n",
2564 irq_ptr->schid.ssid, irq_ptr->schid.sch_no,
2565 result);
2566 result = -EIO;
2567 goto out;
2568 }
2569
2570 resp_code = scsscf_area->response.code;
2571 if (resp_code!=QDIO_CHSC_RESPONSE_CODE_OK) {
2572 QDIO_PRINT_WARN("response upon setting delay target " \
2573 "is 0x%x. Continuing.\n",resp_code);
2574 sprintf(dbf_text,"sdtR%4x",resp_code);
2575 QDIO_DBF_TEXT1(0,trace,dbf_text);
2576 QDIO_DBF_TEXT1(0,setup,dbf_text);
2577 ptr=&scsscf_area->response;
2578 QDIO_DBF_HEX2(1,trace,&ptr,QDIO_DBF_TRACE_LEN);
2579 }
2580 QDIO_DBF_TEXT2(0,trace,"delytrgt");
2581 QDIO_DBF_HEX2(0,trace,&delay_target,sizeof(unsigned long));
2582 result = 0; /* not critical */
2583 out:
2584 free_page ((unsigned long) scsscf_area);
2585 return result;
2586 }
2587
2588 int
2589 qdio_cleanup(struct ccw_device *cdev, int how)
2590 {
2591 struct qdio_irq *irq_ptr;
2592 char dbf_text[15];
2593 int rc;
2594
2595 irq_ptr = cdev->private->qdio_data;
2596 if (!irq_ptr)
2597 return -ENODEV;
2598
2599 sprintf(dbf_text,"qcln%4x",irq_ptr->schid.sch_no);
2600 QDIO_DBF_TEXT1(0,trace,dbf_text);
2601 QDIO_DBF_TEXT0(0,setup,dbf_text);
2602
2603 rc = qdio_shutdown(cdev, how);
2604 if ((rc == 0) || (rc == -EINPROGRESS))
2605 rc = qdio_free(cdev);
2606 return rc;
2607 }
2608
2609 int
2610 qdio_shutdown(struct ccw_device *cdev, int how)
2611 {
2612 struct qdio_irq *irq_ptr;
2613 int i;
2614 int result = 0;
2615 int rc;
2616 unsigned long flags;
2617 int timeout;
2618 char dbf_text[15];
2619
2620 irq_ptr = cdev->private->qdio_data;
2621 if (!irq_ptr)
2622 return -ENODEV;
2623
2624 down(&irq_ptr->setting_up_sema);
2625
2626 sprintf(dbf_text,"qsqs%4x",irq_ptr->schid.sch_no);
2627 QDIO_DBF_TEXT1(0,trace,dbf_text);
2628 QDIO_DBF_TEXT0(0,setup,dbf_text);
2629
2630 /* mark all qs as uninteresting */
2631 for (i=0;i<irq_ptr->no_input_qs;i++)
2632 atomic_set(&irq_ptr->input_qs[i]->is_in_shutdown,1);
2633
2634 for (i=0;i<irq_ptr->no_output_qs;i++)
2635 atomic_set(&irq_ptr->output_qs[i]->is_in_shutdown,1);
2636
2637 tasklet_kill(&tiqdio_tasklet);
2638
2639 for (i=0;i<irq_ptr->no_input_qs;i++) {
2640 qdio_unmark_q(irq_ptr->input_qs[i]);
2641 tasklet_kill(&irq_ptr->input_qs[i]->tasklet);
2642 wait_event_interruptible_timeout(cdev->private->wait_q,
2643 !atomic_read(&irq_ptr->
2644 input_qs[i]->
2645 use_count),
2646 QDIO_NO_USE_COUNT_TIMEOUT);
2647 if (atomic_read(&irq_ptr->input_qs[i]->use_count))
2648 result=-EINPROGRESS;
2649 }
2650
2651 for (i=0;i<irq_ptr->no_output_qs;i++) {
2652 tasklet_kill(&irq_ptr->output_qs[i]->tasklet);
2653 wait_event_interruptible_timeout(cdev->private->wait_q,
2654 !atomic_read(&irq_ptr->
2655 output_qs[i]->
2656 use_count),
2657 QDIO_NO_USE_COUNT_TIMEOUT);
2658 if (atomic_read(&irq_ptr->output_qs[i]->use_count))
2659 result=-EINPROGRESS;
2660 }
2661
2662 /* cleanup subchannel */
2663 spin_lock_irqsave(get_ccwdev_lock(cdev),flags);
2664 if (how&QDIO_FLAG_CLEANUP_USING_CLEAR) {
2665 rc = ccw_device_clear(cdev, QDIO_DOING_CLEANUP);
2666 timeout=QDIO_CLEANUP_CLEAR_TIMEOUT;
2667 } else if (how&QDIO_FLAG_CLEANUP_USING_HALT) {
2668 rc = ccw_device_halt(cdev, QDIO_DOING_CLEANUP);
2669 timeout=QDIO_CLEANUP_HALT_TIMEOUT;
2670 } else { /* default behaviour */
2671 rc = ccw_device_halt(cdev, QDIO_DOING_CLEANUP);
2672 timeout=QDIO_CLEANUP_HALT_TIMEOUT;
2673 }
2674 if (rc == -ENODEV) {
2675 /* No need to wait for device no longer present. */
2676 qdio_set_state(irq_ptr, QDIO_IRQ_STATE_INACTIVE);
2677 spin_unlock_irqrestore(get_ccwdev_lock(cdev), flags);
2678 } else if (((void *)cdev->handler != (void *)qdio_handler) && rc == 0) {
2679 /*
2680 * Whoever put another handler there, has to cope with the
2681 * interrupt theirself. Might happen if qdio_shutdown was
2682 * called on already shutdown queues, but this shouldn't have
2683 * bad side effects.
2684 */
2685 qdio_set_state(irq_ptr, QDIO_IRQ_STATE_INACTIVE);
2686 spin_unlock_irqrestore(get_ccwdev_lock(cdev), flags);
2687 } else if (rc == 0) {
2688 qdio_set_state(irq_ptr, QDIO_IRQ_STATE_CLEANUP);
2689 ccw_device_set_timeout(cdev, timeout);
2690 spin_unlock_irqrestore(get_ccwdev_lock(cdev),flags);
2691
2692 wait_event(cdev->private->wait_q,
2693 irq_ptr->state == QDIO_IRQ_STATE_INACTIVE ||
2694 irq_ptr->state == QDIO_IRQ_STATE_ERR);
2695 } else {
2696 QDIO_PRINT_INFO("ccw_device_{halt,clear} returned %d for "
2697 "device %s\n", result, cdev->dev.bus_id);
2698 spin_unlock_irqrestore(get_ccwdev_lock(cdev), flags);
2699 result = rc;
2700 goto out;
2701 }
2702 if (irq_ptr->is_thinint_irq) {
2703 qdio_put_indicator((__u32*)irq_ptr->dev_st_chg_ind);
2704 tiqdio_set_subchannel_ind(irq_ptr,1);
2705 /* reset adapter interrupt indicators */
2706 }
2707
2708 /* exchange int handlers, if necessary */
2709 if ((void*)cdev->handler == (void*)qdio_handler)
2710 cdev->handler=irq_ptr->original_int_handler;
2711
2712 /* Ignore errors. */
2713 qdio_set_state(irq_ptr, QDIO_IRQ_STATE_INACTIVE);
2714 ccw_device_set_timeout(cdev, 0);
2715 out:
2716 up(&irq_ptr->setting_up_sema);
2717 return result;
2718 }
2719
2720 int
2721 qdio_free(struct ccw_device *cdev)
2722 {
2723 struct qdio_irq *irq_ptr;
2724 char dbf_text[15];
2725
2726 irq_ptr = cdev->private->qdio_data;
2727 if (!irq_ptr)
2728 return -ENODEV;
2729
2730 down(&irq_ptr->setting_up_sema);
2731
2732 sprintf(dbf_text,"qfqs%4x",irq_ptr->schid.sch_no);
2733 QDIO_DBF_TEXT1(0,trace,dbf_text);
2734 QDIO_DBF_TEXT0(0,setup,dbf_text);
2735
2736 cdev->private->qdio_data = 0;
2737
2738 up(&irq_ptr->setting_up_sema);
2739
2740 qdio_release_irq_memory(irq_ptr);
2741 module_put(THIS_MODULE);
2742 return 0;
2743 }
2744
2745 static inline void
2746 qdio_allocate_do_dbf(struct qdio_initialize *init_data)
2747 {
2748 char dbf_text[20]; /* if a printf printed out more than 8 chars */
2749
2750 sprintf(dbf_text,"qfmt:%x",init_data->q_format);
2751 QDIO_DBF_TEXT0(0,setup,dbf_text);
2752 QDIO_DBF_HEX0(0,setup,init_data->adapter_name,8);
2753 sprintf(dbf_text,"qpff%4x",init_data->qib_param_field_format);
2754 QDIO_DBF_TEXT0(0,setup,dbf_text);
2755 QDIO_DBF_HEX0(0,setup,&init_data->qib_param_field,sizeof(char*));
2756 QDIO_DBF_HEX0(0,setup,&init_data->input_slib_elements,sizeof(long*));
2757 QDIO_DBF_HEX0(0,setup,&init_data->output_slib_elements,sizeof(long*));
2758 sprintf(dbf_text,"miit%4x",init_data->min_input_threshold);
2759 QDIO_DBF_TEXT0(0,setup,dbf_text);
2760 sprintf(dbf_text,"mait%4x",init_data->max_input_threshold);
2761 QDIO_DBF_TEXT0(0,setup,dbf_text);
2762 sprintf(dbf_text,"miot%4x",init_data->min_output_threshold);
2763 QDIO_DBF_TEXT0(0,setup,dbf_text);
2764 sprintf(dbf_text,"maot%4x",init_data->max_output_threshold);
2765 QDIO_DBF_TEXT0(0,setup,dbf_text);
2766 sprintf(dbf_text,"niq:%4x",init_data->no_input_qs);
2767 QDIO_DBF_TEXT0(0,setup,dbf_text);
2768 sprintf(dbf_text,"noq:%4x",init_data->no_output_qs);
2769 QDIO_DBF_TEXT0(0,setup,dbf_text);
2770 QDIO_DBF_HEX0(0,setup,&init_data->input_handler,sizeof(void*));
2771 QDIO_DBF_HEX0(0,setup,&init_data->output_handler,sizeof(void*));
2772 QDIO_DBF_HEX0(0,setup,&init_data->int_parm,sizeof(long));
2773 QDIO_DBF_HEX0(0,setup,&init_data->flags,sizeof(long));
2774 QDIO_DBF_HEX0(0,setup,&init_data->input_sbal_addr_array,sizeof(void*));
2775 QDIO_DBF_HEX0(0,setup,&init_data->output_sbal_addr_array,sizeof(void*));
2776 }
2777
2778 static inline void
2779 qdio_allocate_fill_input_desc(struct qdio_irq *irq_ptr, int i, int iqfmt)
2780 {
2781 irq_ptr->input_qs[i]->is_iqdio_q = iqfmt;
2782 irq_ptr->input_qs[i]->is_thinint_q = irq_ptr->is_thinint_irq;
2783
2784 irq_ptr->qdr->qdf0[i].sliba=(unsigned long)(irq_ptr->input_qs[i]->slib);
2785
2786 irq_ptr->qdr->qdf0[i].sla=(unsigned long)(irq_ptr->input_qs[i]->sl);
2787
2788 irq_ptr->qdr->qdf0[i].slsba=
2789 (unsigned long)(&irq_ptr->input_qs[i]->slsb.acc.val[0]);
2790
2791 irq_ptr->qdr->qdf0[i].akey=QDIO_STORAGE_KEY;
2792 irq_ptr->qdr->qdf0[i].bkey=QDIO_STORAGE_KEY;
2793 irq_ptr->qdr->qdf0[i].ckey=QDIO_STORAGE_KEY;
2794 irq_ptr->qdr->qdf0[i].dkey=QDIO_STORAGE_KEY;
2795 }
2796
2797 static inline void
2798 qdio_allocate_fill_output_desc(struct qdio_irq *irq_ptr, int i,
2799 int j, int iqfmt)
2800 {
2801 irq_ptr->output_qs[i]->is_iqdio_q = iqfmt;
2802 irq_ptr->output_qs[i]->is_thinint_q = irq_ptr->is_thinint_irq;
2803
2804 irq_ptr->qdr->qdf0[i+j].sliba=(unsigned long)(irq_ptr->output_qs[i]->slib);
2805
2806 irq_ptr->qdr->qdf0[i+j].sla=(unsigned long)(irq_ptr->output_qs[i]->sl);
2807
2808 irq_ptr->qdr->qdf0[i+j].slsba=
2809 (unsigned long)(&irq_ptr->output_qs[i]->slsb.acc.val[0]);
2810
2811 irq_ptr->qdr->qdf0[i+j].akey=QDIO_STORAGE_KEY;
2812 irq_ptr->qdr->qdf0[i+j].bkey=QDIO_STORAGE_KEY;
2813 irq_ptr->qdr->qdf0[i+j].ckey=QDIO_STORAGE_KEY;
2814 irq_ptr->qdr->qdf0[i+j].dkey=QDIO_STORAGE_KEY;
2815 }
2816
2817
2818 static inline void
2819 qdio_initialize_set_siga_flags_input(struct qdio_irq *irq_ptr)
2820 {
2821 int i;
2822
2823 for (i=0;i<irq_ptr->no_input_qs;i++) {
2824 irq_ptr->input_qs[i]->siga_sync=
2825 irq_ptr->qdioac&CHSC_FLAG_SIGA_SYNC_NECESSARY;
2826 irq_ptr->input_qs[i]->siga_in=
2827 irq_ptr->qdioac&CHSC_FLAG_SIGA_INPUT_NECESSARY;
2828 irq_ptr->input_qs[i]->siga_out=
2829 irq_ptr->qdioac&CHSC_FLAG_SIGA_OUTPUT_NECESSARY;
2830 irq_ptr->input_qs[i]->siga_sync_done_on_thinints=
2831 irq_ptr->qdioac&CHSC_FLAG_SIGA_SYNC_DONE_ON_THININTS;
2832 irq_ptr->input_qs[i]->hydra_gives_outbound_pcis=
2833 irq_ptr->hydra_gives_outbound_pcis;
2834 irq_ptr->input_qs[i]->siga_sync_done_on_outb_tis=
2835 ((irq_ptr->qdioac&
2836 (CHSC_FLAG_SIGA_SYNC_DONE_ON_OUTB_PCIS|
2837 CHSC_FLAG_SIGA_SYNC_DONE_ON_THININTS))==
2838 (CHSC_FLAG_SIGA_SYNC_DONE_ON_OUTB_PCIS|
2839 CHSC_FLAG_SIGA_SYNC_DONE_ON_THININTS));
2840
2841 }
2842 }
2843
2844 static inline void
2845 qdio_initialize_set_siga_flags_output(struct qdio_irq *irq_ptr)
2846 {
2847 int i;
2848
2849 for (i=0;i<irq_ptr->no_output_qs;i++) {
2850 irq_ptr->output_qs[i]->siga_sync=
2851 irq_ptr->qdioac&CHSC_FLAG_SIGA_SYNC_NECESSARY;
2852 irq_ptr->output_qs[i]->siga_in=
2853 irq_ptr->qdioac&CHSC_FLAG_SIGA_INPUT_NECESSARY;
2854 irq_ptr->output_qs[i]->siga_out=
2855 irq_ptr->qdioac&CHSC_FLAG_SIGA_OUTPUT_NECESSARY;
2856 irq_ptr->output_qs[i]->siga_sync_done_on_thinints=
2857 irq_ptr->qdioac&CHSC_FLAG_SIGA_SYNC_DONE_ON_THININTS;
2858 irq_ptr->output_qs[i]->hydra_gives_outbound_pcis=
2859 irq_ptr->hydra_gives_outbound_pcis;
2860 irq_ptr->output_qs[i]->siga_sync_done_on_outb_tis=
2861 ((irq_ptr->qdioac&
2862 (CHSC_FLAG_SIGA_SYNC_DONE_ON_OUTB_PCIS|
2863 CHSC_FLAG_SIGA_SYNC_DONE_ON_THININTS))==
2864 (CHSC_FLAG_SIGA_SYNC_DONE_ON_OUTB_PCIS|
2865 CHSC_FLAG_SIGA_SYNC_DONE_ON_THININTS));
2866
2867 }
2868 }
2869
2870 static inline int
2871 qdio_establish_irq_check_for_errors(struct ccw_device *cdev, int cstat,
2872 int dstat)
2873 {
2874 char dbf_text[15];
2875 struct qdio_irq *irq_ptr;
2876
2877 irq_ptr = cdev->private->qdio_data;
2878
2879 if (cstat || (dstat & ~(DEV_STAT_CHN_END|DEV_STAT_DEV_END))) {
2880 sprintf(dbf_text,"ick1%4x",irq_ptr->schid.sch_no);
2881 QDIO_DBF_TEXT2(1,trace,dbf_text);
2882 QDIO_DBF_HEX2(0,trace,&dstat,sizeof(int));
2883 QDIO_DBF_HEX2(0,trace,&cstat,sizeof(int));
2884 QDIO_PRINT_ERR("received check condition on establish " \
2885 "queues on irq 0.%x.%x (cs=x%x, ds=x%x).\n",
2886 irq_ptr->schid.ssid, irq_ptr->schid.sch_no,
2887 cstat,dstat);
2888 qdio_set_state(irq_ptr,QDIO_IRQ_STATE_ERR);
2889 }
2890
2891 if (!(dstat & DEV_STAT_DEV_END)) {
2892 QDIO_DBF_TEXT2(1,setup,"eq:no de");
2893 QDIO_DBF_HEX2(0,setup,&dstat, sizeof(dstat));
2894 QDIO_DBF_HEX2(0,setup,&cstat, sizeof(cstat));
2895 QDIO_PRINT_ERR("establish queues on irq 0.%x.%04x: didn't get "
2896 "device end: dstat=%02x, cstat=%02x\n",
2897 irq_ptr->schid.ssid, irq_ptr->schid.sch_no,
2898 dstat, cstat);
2899 qdio_set_state(irq_ptr, QDIO_IRQ_STATE_ERR);
2900 return 1;
2901 }
2902
2903 if (dstat & ~(DEV_STAT_CHN_END|DEV_STAT_DEV_END)) {
2904 QDIO_DBF_TEXT2(1,setup,"eq:badio");
2905 QDIO_DBF_HEX2(0,setup,&dstat, sizeof(dstat));
2906 QDIO_DBF_HEX2(0,setup,&cstat, sizeof(cstat));
2907 QDIO_PRINT_ERR("establish queues on irq 0.%x.%04x: got "
2908 "the following devstat: dstat=%02x, "
2909 "cstat=%02x\n", irq_ptr->schid.ssid,
2910 irq_ptr->schid.sch_no, dstat, cstat);
2911 qdio_set_state(irq_ptr, QDIO_IRQ_STATE_ERR);
2912 return 1;
2913 }
2914 return 0;
2915 }
2916
2917 static void
2918 qdio_establish_handle_irq(struct ccw_device *cdev, int cstat, int dstat)
2919 {
2920 struct qdio_irq *irq_ptr;
2921 char dbf_text[15];
2922
2923 irq_ptr = cdev->private->qdio_data;
2924
2925 sprintf(dbf_text,"qehi%4x",cdev->private->sch_no);
2926 QDIO_DBF_TEXT0(0,setup,dbf_text);
2927 QDIO_DBF_TEXT0(0,trace,dbf_text);
2928
2929 if (qdio_establish_irq_check_for_errors(cdev, cstat, dstat)) {
2930 ccw_device_set_timeout(cdev, 0);
2931 return;
2932 }
2933
2934 qdio_set_state(irq_ptr,QDIO_IRQ_STATE_ESTABLISHED);
2935 ccw_device_set_timeout(cdev, 0);
2936 }
2937
2938 int
2939 qdio_initialize(struct qdio_initialize *init_data)
2940 {
2941 int rc;
2942 char dbf_text[15];
2943
2944 sprintf(dbf_text,"qini%4x",init_data->cdev->private->sch_no);
2945 QDIO_DBF_TEXT0(0,setup,dbf_text);
2946 QDIO_DBF_TEXT0(0,trace,dbf_text);
2947
2948 rc = qdio_allocate(init_data);
2949 if (rc == 0) {
2950 rc = qdio_establish(init_data);
2951 if (rc != 0)
2952 qdio_free(init_data->cdev);
2953 }
2954
2955 return rc;
2956 }
2957
2958
2959 int
2960 qdio_allocate(struct qdio_initialize *init_data)
2961 {
2962 struct qdio_irq *irq_ptr;
2963 char dbf_text[15];
2964
2965 sprintf(dbf_text,"qalc%4x",init_data->cdev->private->sch_no);
2966 QDIO_DBF_TEXT0(0,setup,dbf_text);
2967 QDIO_DBF_TEXT0(0,trace,dbf_text);
2968 if ( (init_data->no_input_qs>QDIO_MAX_QUEUES_PER_IRQ) ||
2969 (init_data->no_output_qs>QDIO_MAX_QUEUES_PER_IRQ) ||
2970 ((init_data->no_input_qs) && (!init_data->input_handler)) ||
2971 ((init_data->no_output_qs) && (!init_data->output_handler)) )
2972 return -EINVAL;
2973
2974 if (!init_data->input_sbal_addr_array)
2975 return -EINVAL;
2976
2977 if (!init_data->output_sbal_addr_array)
2978 return -EINVAL;
2979
2980 qdio_allocate_do_dbf(init_data);
2981
2982 /* create irq */
2983 irq_ptr = kzalloc(sizeof(struct qdio_irq), GFP_KERNEL | GFP_DMA);
2984
2985 QDIO_DBF_TEXT0(0,setup,"irq_ptr:");
2986 QDIO_DBF_HEX0(0,setup,&irq_ptr,sizeof(void*));
2987
2988 if (!irq_ptr) {
2989 QDIO_PRINT_ERR("kmalloc of irq_ptr failed!\n");
2990 return -ENOMEM;
2991 }
2992
2993 init_MUTEX(&irq_ptr->setting_up_sema);
2994
2995 /* QDR must be in DMA area since CCW data address is only 32 bit */
2996 irq_ptr->qdr=kmalloc(sizeof(struct qdr), GFP_KERNEL | GFP_DMA);
2997 if (!(irq_ptr->qdr)) {
2998 kfree(irq_ptr);
2999 QDIO_PRINT_ERR("kmalloc of irq_ptr->qdr failed!\n");
3000 return -ENOMEM;
3001 }
3002 QDIO_DBF_TEXT0(0,setup,"qdr:");
3003 QDIO_DBF_HEX0(0,setup,&irq_ptr->qdr,sizeof(void*));
3004
3005 if (qdio_alloc_qs(irq_ptr,
3006 init_data->no_input_qs,
3007 init_data->no_output_qs)) {
3008 qdio_release_irq_memory(irq_ptr);
3009 return -ENOMEM;
3010 }
3011
3012 init_data->cdev->private->qdio_data = irq_ptr;
3013
3014 qdio_set_state(irq_ptr,QDIO_IRQ_STATE_INACTIVE);
3015
3016 return 0;
3017 }
3018
3019 int qdio_fill_irq(struct qdio_initialize *init_data)
3020 {
3021 int i;
3022 char dbf_text[15];
3023 struct ciw *ciw;
3024 int is_iqdio;
3025 struct qdio_irq *irq_ptr;
3026
3027 irq_ptr = init_data->cdev->private->qdio_data;
3028
3029 memset(irq_ptr,0,((char*)&irq_ptr->qdr)-((char*)irq_ptr));
3030
3031 /* wipes qib.ac, required by ar7063 */
3032 memset(irq_ptr->qdr,0,sizeof(struct qdr));
3033
3034 irq_ptr->int_parm=init_data->int_parm;
3035
3036 irq_ptr->schid = ccw_device_get_subchannel_id(init_data->cdev);
3037 irq_ptr->no_input_qs=init_data->no_input_qs;
3038 irq_ptr->no_output_qs=init_data->no_output_qs;
3039
3040 if (init_data->q_format==QDIO_IQDIO_QFMT) {
3041 irq_ptr->is_iqdio_irq=1;
3042 irq_ptr->is_thinint_irq=1;
3043 } else {
3044 irq_ptr->is_iqdio_irq=0;
3045 irq_ptr->is_thinint_irq=hydra_thinints;
3046 }
3047 sprintf(dbf_text,"is_i_t%1x%1x",
3048 irq_ptr->is_iqdio_irq,irq_ptr->is_thinint_irq);
3049 QDIO_DBF_TEXT2(0,setup,dbf_text);
3050
3051 if (irq_ptr->is_thinint_irq) {
3052 irq_ptr->dev_st_chg_ind = qdio_get_indicator();
3053 QDIO_DBF_HEX1(0,setup,&irq_ptr->dev_st_chg_ind,sizeof(void*));
3054 if (!irq_ptr->dev_st_chg_ind) {
3055 QDIO_PRINT_WARN("no indicator location available " \
3056 "for irq 0.%x.%x\n",
3057 irq_ptr->schid.ssid, irq_ptr->schid.sch_no);
3058 qdio_release_irq_memory(irq_ptr);
3059 return -ENOBUFS;
3060 }
3061 }
3062
3063 /* defaults */
3064 irq_ptr->equeue.cmd=DEFAULT_ESTABLISH_QS_CMD;
3065 irq_ptr->equeue.count=DEFAULT_ESTABLISH_QS_COUNT;
3066 irq_ptr->aqueue.cmd=DEFAULT_ACTIVATE_QS_CMD;
3067 irq_ptr->aqueue.count=DEFAULT_ACTIVATE_QS_COUNT;
3068
3069 qdio_fill_qs(irq_ptr, init_data->cdev,
3070 init_data->no_input_qs,
3071 init_data->no_output_qs,
3072 init_data->input_handler,
3073 init_data->output_handler,init_data->int_parm,
3074 init_data->q_format,init_data->flags,
3075 init_data->input_sbal_addr_array,
3076 init_data->output_sbal_addr_array);
3077
3078 if (!try_module_get(THIS_MODULE)) {
3079 QDIO_PRINT_CRIT("try_module_get() failed!\n");
3080 qdio_release_irq_memory(irq_ptr);
3081 return -EINVAL;
3082 }
3083
3084 qdio_fill_thresholds(irq_ptr,init_data->no_input_qs,
3085 init_data->no_output_qs,
3086 init_data->min_input_threshold,
3087 init_data->max_input_threshold,
3088 init_data->min_output_threshold,
3089 init_data->max_output_threshold);
3090
3091 /* fill in qdr */
3092 irq_ptr->qdr->qfmt=init_data->q_format;
3093 irq_ptr->qdr->iqdcnt=init_data->no_input_qs;
3094 irq_ptr->qdr->oqdcnt=init_data->no_output_qs;
3095 irq_ptr->qdr->iqdsz=sizeof(struct qdesfmt0)/4; /* size in words */
3096 irq_ptr->qdr->oqdsz=sizeof(struct qdesfmt0)/4;
3097
3098 irq_ptr->qdr->qiba=(unsigned long)&irq_ptr->qib;
3099 irq_ptr->qdr->qkey=QDIO_STORAGE_KEY;
3100
3101 /* fill in qib */
3102 irq_ptr->is_qebsm = is_passthrough;
3103 if (irq_ptr->is_qebsm)
3104 irq_ptr->qib.rflags |= QIB_RFLAGS_ENABLE_QEBSM;
3105
3106 irq_ptr->qib.qfmt=init_data->q_format;
3107 if (init_data->no_input_qs)
3108 irq_ptr->qib.isliba=(unsigned long)(irq_ptr->input_qs[0]->slib);
3109 if (init_data->no_output_qs)
3110 irq_ptr->qib.osliba=(unsigned long)(irq_ptr->output_qs[0]->slib);
3111 memcpy(irq_ptr->qib.ebcnam,init_data->adapter_name,8);
3112
3113 qdio_set_impl_params(irq_ptr,init_data->qib_param_field_format,
3114 init_data->qib_param_field,
3115 init_data->no_input_qs,
3116 init_data->no_output_qs,
3117 init_data->input_slib_elements,
3118 init_data->output_slib_elements);
3119
3120 /* first input descriptors, then output descriptors */
3121 is_iqdio = (init_data->q_format == QDIO_IQDIO_QFMT) ? 1 : 0;
3122 for (i=0;i<init_data->no_input_qs;i++)
3123 qdio_allocate_fill_input_desc(irq_ptr, i, is_iqdio);
3124
3125 for (i=0;i<init_data->no_output_qs;i++)
3126 qdio_allocate_fill_output_desc(irq_ptr, i,
3127 init_data->no_input_qs,
3128 is_iqdio);
3129
3130 /* qdr, qib, sls, slsbs, slibs, sbales filled. */
3131
3132 /* get qdio commands */
3133 ciw = ccw_device_get_ciw(init_data->cdev, CIW_TYPE_EQUEUE);
3134 if (!ciw) {
3135 QDIO_DBF_TEXT2(1,setup,"no eq");
3136 QDIO_PRINT_INFO("No equeue CIW found for QDIO commands. "
3137 "Trying to use default.\n");
3138 } else
3139 irq_ptr->equeue = *ciw;
3140 ciw = ccw_device_get_ciw(init_data->cdev, CIW_TYPE_AQUEUE);
3141 if (!ciw) {
3142 QDIO_DBF_TEXT2(1,setup,"no aq");
3143 QDIO_PRINT_INFO("No aqueue CIW found for QDIO commands. "
3144 "Trying to use default.\n");
3145 } else
3146 irq_ptr->aqueue = *ciw;
3147
3148 /* Set new interrupt handler. */
3149 irq_ptr->original_int_handler = init_data->cdev->handler;
3150 init_data->cdev->handler = qdio_handler;
3151
3152 return 0;
3153 }
3154
3155 int
3156 qdio_establish(struct qdio_initialize *init_data)
3157 {
3158 struct qdio_irq *irq_ptr;
3159 unsigned long saveflags;
3160 int result, result2;
3161 struct ccw_device *cdev;
3162 char dbf_text[20];
3163
3164 cdev=init_data->cdev;
3165 irq_ptr = cdev->private->qdio_data;
3166 if (!irq_ptr)
3167 return -EINVAL;
3168
3169 if (cdev->private->state != DEV_STATE_ONLINE)
3170 return -EINVAL;
3171
3172 down(&irq_ptr->setting_up_sema);
3173
3174 qdio_fill_irq(init_data);
3175
3176 /* the thinint CHSC stuff */
3177 if (irq_ptr->is_thinint_irq) {
3178
3179 result = tiqdio_set_subchannel_ind(irq_ptr,0);
3180 if (result) {
3181 up(&irq_ptr->setting_up_sema);
3182 qdio_shutdown(cdev, QDIO_FLAG_CLEANUP_USING_CLEAR);
3183 return result;
3184 }
3185 tiqdio_set_delay_target(irq_ptr,TIQDIO_DELAY_TARGET);
3186 }
3187
3188 sprintf(dbf_text,"qest%4x",cdev->private->sch_no);
3189 QDIO_DBF_TEXT0(0,setup,dbf_text);
3190 QDIO_DBF_TEXT0(0,trace,dbf_text);
3191
3192 /* establish q */
3193 irq_ptr->ccw.cmd_code=irq_ptr->equeue.cmd;
3194 irq_ptr->ccw.flags=CCW_FLAG_SLI;
3195 irq_ptr->ccw.count=irq_ptr->equeue.count;
3196 irq_ptr->ccw.cda=QDIO_GET_ADDR(irq_ptr->qdr);
3197
3198 spin_lock_irqsave(get_ccwdev_lock(cdev),saveflags);
3199
3200 ccw_device_set_options(cdev, 0);
3201 result=ccw_device_start_timeout(cdev,&irq_ptr->ccw,
3202 QDIO_DOING_ESTABLISH,0, 0,
3203 QDIO_ESTABLISH_TIMEOUT);
3204 if (result) {
3205 result2=ccw_device_start_timeout(cdev,&irq_ptr->ccw,
3206 QDIO_DOING_ESTABLISH,0,0,
3207 QDIO_ESTABLISH_TIMEOUT);
3208 sprintf(dbf_text,"eq:io%4x",result);
3209 QDIO_DBF_TEXT2(1,setup,dbf_text);
3210 if (result2) {
3211 sprintf(dbf_text,"eq:io%4x",result);
3212 QDIO_DBF_TEXT2(1,setup,dbf_text);
3213 }
3214 QDIO_PRINT_WARN("establish queues on irq 0.%x.%04x: do_IO " \
3215 "returned %i, next try returned %i\n",
3216 irq_ptr->schid.ssid, irq_ptr->schid.sch_no,
3217 result, result2);
3218 result=result2;
3219 if (result)
3220 ccw_device_set_timeout(cdev, 0);
3221 }
3222
3223 spin_unlock_irqrestore(get_ccwdev_lock(cdev),saveflags);
3224
3225 if (result) {
3226 up(&irq_ptr->setting_up_sema);
3227 qdio_shutdown(cdev,QDIO_FLAG_CLEANUP_USING_CLEAR);
3228 return result;
3229 }
3230
3231 /* Timeout is cared for already by using ccw_device_start_timeout(). */
3232 wait_event_interruptible(cdev->private->wait_q,
3233 irq_ptr->state == QDIO_IRQ_STATE_ESTABLISHED ||
3234 irq_ptr->state == QDIO_IRQ_STATE_ERR);
3235
3236 if (irq_ptr->state == QDIO_IRQ_STATE_ESTABLISHED)
3237 result = 0;
3238 else {
3239 up(&irq_ptr->setting_up_sema);
3240 qdio_shutdown(cdev, QDIO_FLAG_CLEANUP_USING_CLEAR);
3241 return -EIO;
3242 }
3243
3244 qdio_get_ssqd_information(irq_ptr);
3245 /* if this gets set once, we're running under VM and can omit SVSes */
3246 if (irq_ptr->qdioac&CHSC_FLAG_SIGA_SYNC_NECESSARY)
3247 omit_svs=1;
3248
3249 sprintf(dbf_text,"qdioac%2x",irq_ptr->qdioac);
3250 QDIO_DBF_TEXT2(0,setup,dbf_text);
3251
3252 sprintf(dbf_text,"qib ac%2x",irq_ptr->qib.ac);
3253 QDIO_DBF_TEXT2(0,setup,dbf_text);
3254
3255 irq_ptr->hydra_gives_outbound_pcis=
3256 irq_ptr->qib.ac&QIB_AC_OUTBOUND_PCI_SUPPORTED;
3257 irq_ptr->sync_done_on_outb_pcis=
3258 irq_ptr->qdioac&CHSC_FLAG_SIGA_SYNC_DONE_ON_OUTB_PCIS;
3259
3260 qdio_initialize_set_siga_flags_input(irq_ptr);
3261 qdio_initialize_set_siga_flags_output(irq_ptr);
3262
3263 up(&irq_ptr->setting_up_sema);
3264
3265 return result;
3266
3267 }
3268
3269 int
3270 qdio_activate(struct ccw_device *cdev, int flags)
3271 {
3272 struct qdio_irq *irq_ptr;
3273 int i,result=0,result2;
3274 unsigned long saveflags;
3275 char dbf_text[20]; /* see qdio_initialize */
3276
3277 irq_ptr = cdev->private->qdio_data;
3278 if (!irq_ptr)
3279 return -ENODEV;
3280
3281 if (cdev->private->state != DEV_STATE_ONLINE)
3282 return -EINVAL;
3283
3284 down(&irq_ptr->setting_up_sema);
3285 if (irq_ptr->state==QDIO_IRQ_STATE_INACTIVE) {
3286 result=-EBUSY;
3287 goto out;
3288 }
3289
3290 sprintf(dbf_text,"qact%4x", irq_ptr->schid.sch_no);
3291 QDIO_DBF_TEXT2(0,setup,dbf_text);
3292 QDIO_DBF_TEXT2(0,trace,dbf_text);
3293
3294 /* activate q */
3295 irq_ptr->ccw.cmd_code=irq_ptr->aqueue.cmd;
3296 irq_ptr->ccw.flags=CCW_FLAG_SLI;
3297 irq_ptr->ccw.count=irq_ptr->aqueue.count;
3298 irq_ptr->ccw.cda=QDIO_GET_ADDR(0);
3299
3300 spin_lock_irqsave(get_ccwdev_lock(cdev),saveflags);
3301
3302 ccw_device_set_timeout(cdev, 0);
3303 ccw_device_set_options(cdev, CCWDEV_REPORT_ALL);
3304 result=ccw_device_start(cdev,&irq_ptr->ccw,QDIO_DOING_ACTIVATE,
3305 0, DOIO_DENY_PREFETCH);
3306 if (result) {
3307 result2=ccw_device_start(cdev,&irq_ptr->ccw,
3308 QDIO_DOING_ACTIVATE,0,0);
3309 sprintf(dbf_text,"aq:io%4x",result);
3310 QDIO_DBF_TEXT2(1,setup,dbf_text);
3311 if (result2) {
3312 sprintf(dbf_text,"aq:io%4x",result);
3313 QDIO_DBF_TEXT2(1,setup,dbf_text);
3314 }
3315 QDIO_PRINT_WARN("activate queues on irq 0.%x.%04x: do_IO " \
3316 "returned %i, next try returned %i\n",
3317 irq_ptr->schid.ssid, irq_ptr->schid.sch_no,
3318 result, result2);
3319 result=result2;
3320 }
3321
3322 spin_unlock_irqrestore(get_ccwdev_lock(cdev),saveflags);
3323 if (result)
3324 goto out;
3325
3326 for (i=0;i<irq_ptr->no_input_qs;i++) {
3327 if (irq_ptr->is_thinint_irq) {
3328 /*
3329 * that way we know, that, if we will get interrupted
3330 * by tiqdio_inbound_processing, qdio_unmark_q will
3331 * not be called
3332 */
3333 qdio_reserve_q(irq_ptr->input_qs[i]);
3334 qdio_mark_tiq(irq_ptr->input_qs[i]);
3335 qdio_release_q(irq_ptr->input_qs[i]);
3336 }
3337 }
3338
3339 if (flags&QDIO_FLAG_NO_INPUT_INTERRUPT_CONTEXT) {
3340 for (i=0;i<irq_ptr->no_input_qs;i++) {
3341 irq_ptr->input_qs[i]->is_input_q|=
3342 QDIO_FLAG_NO_INPUT_INTERRUPT_CONTEXT;
3343 }
3344 }
3345
3346 wait_event_interruptible_timeout(cdev->private->wait_q,
3347 ((irq_ptr->state ==
3348 QDIO_IRQ_STATE_STOPPED) ||
3349 (irq_ptr->state ==
3350 QDIO_IRQ_STATE_ERR)),
3351 QDIO_ACTIVATE_TIMEOUT);
3352
3353 switch (irq_ptr->state) {
3354 case QDIO_IRQ_STATE_STOPPED:
3355 case QDIO_IRQ_STATE_ERR:
3356 up(&irq_ptr->setting_up_sema);
3357 qdio_shutdown(cdev, QDIO_FLAG_CLEANUP_USING_CLEAR);
3358 down(&irq_ptr->setting_up_sema);
3359 result = -EIO;
3360 break;
3361 default:
3362 qdio_set_state(irq_ptr, QDIO_IRQ_STATE_ACTIVE);
3363 result = 0;
3364 }
3365 out:
3366 up(&irq_ptr->setting_up_sema);
3367
3368 return result;
3369 }
3370
3371 /* buffers filled forwards again to make Rick happy */
3372 static inline void
3373 qdio_do_qdio_fill_input(struct qdio_q *q, unsigned int qidx,
3374 unsigned int count, struct qdio_buffer *buffers)
3375 {
3376 struct qdio_irq *irq = (struct qdio_irq *) q->irq_ptr;
3377 qidx &= (QDIO_MAX_BUFFERS_PER_Q - 1);
3378 if (irq->is_qebsm) {
3379 while (count)
3380 set_slsb(q, &qidx, SLSB_CU_INPUT_EMPTY, &count);
3381 return;
3382 }
3383 for (;;) {
3384 set_slsb(q, &qidx, SLSB_CU_INPUT_EMPTY, &count);
3385 count--;
3386 if (!count) break;
3387 qidx = (qidx + 1) & (QDIO_MAX_BUFFERS_PER_Q - 1);
3388 }
3389 }
3390
3391 static inline void
3392 qdio_do_qdio_fill_output(struct qdio_q *q, unsigned int qidx,
3393 unsigned int count, struct qdio_buffer *buffers)
3394 {
3395 struct qdio_irq *irq = (struct qdio_irq *) q->irq_ptr;
3396
3397 qidx &= (QDIO_MAX_BUFFERS_PER_Q - 1);
3398 if (irq->is_qebsm) {
3399 while (count)
3400 set_slsb(q, &qidx, SLSB_CU_OUTPUT_PRIMED, &count);
3401 return;
3402 }
3403
3404 for (;;) {
3405 set_slsb(q, &qidx, SLSB_CU_OUTPUT_PRIMED, &count);
3406 count--;
3407 if (!count) break;
3408 qidx = (qidx + 1) & (QDIO_MAX_BUFFERS_PER_Q - 1);
3409 }
3410 }
3411
3412 static inline void
3413 do_qdio_handle_inbound(struct qdio_q *q, unsigned int callflags,
3414 unsigned int qidx, unsigned int count,
3415 struct qdio_buffer *buffers)
3416 {
3417 int used_elements;
3418
3419 /* This is the inbound handling of queues */
3420 used_elements=atomic_add_return(count, &q->number_of_buffers_used) - count;
3421
3422 qdio_do_qdio_fill_input(q,qidx,count,buffers);
3423
3424 if ((used_elements+count==QDIO_MAX_BUFFERS_PER_Q)&&
3425 (callflags&QDIO_FLAG_UNDER_INTERRUPT))
3426 atomic_swap(&q->polling,0);
3427
3428 if (used_elements)
3429 return;
3430 if (callflags&QDIO_FLAG_DONT_SIGA)
3431 return;
3432 if (q->siga_in) {
3433 int result;
3434
3435 result=qdio_siga_input(q);
3436 if (result) {
3437 if (q->siga_error)
3438 q->error_status_flags|=
3439 QDIO_STATUS_MORE_THAN_ONE_SIGA_ERROR;
3440 q->error_status_flags|=QDIO_STATUS_LOOK_FOR_ERROR;
3441 q->siga_error=result;
3442 }
3443 }
3444
3445 qdio_mark_q(q);
3446 }
3447
3448 static inline void
3449 do_qdio_handle_outbound(struct qdio_q *q, unsigned int callflags,
3450 unsigned int qidx, unsigned int count,
3451 struct qdio_buffer *buffers)
3452 {
3453 int used_elements;
3454 unsigned int cnt, start_buf;
3455 unsigned char state = 0;
3456 struct qdio_irq *irq = (struct qdio_irq *) q->irq_ptr;
3457
3458 /* This is the outbound handling of queues */
3459 #ifdef QDIO_PERFORMANCE_STATS
3460 perf_stats.start_time_outbound=NOW;
3461 #endif /* QDIO_PERFORMANCE_STATS */
3462
3463 qdio_do_qdio_fill_output(q,qidx,count,buffers);
3464
3465 used_elements=atomic_add_return(count, &q->number_of_buffers_used) - count;
3466
3467 if (callflags&QDIO_FLAG_DONT_SIGA) {
3468 #ifdef QDIO_PERFORMANCE_STATS
3469 perf_stats.outbound_time+=NOW-perf_stats.start_time_outbound;
3470 perf_stats.outbound_cnt++;
3471 #endif /* QDIO_PERFORMANCE_STATS */
3472 return;
3473 }
3474 if (q->is_iqdio_q) {
3475 /* one siga for every sbal */
3476 while (count--)
3477 qdio_kick_outbound_q(q);
3478
3479 __qdio_outbound_processing(q);
3480 } else {
3481 /* under VM, we do a SIGA sync unconditionally */
3482 SYNC_MEMORY;
3483 else {
3484 /*
3485 * w/o shadow queues (else branch of
3486 * SYNC_MEMORY :-/ ), we try to
3487 * fast-requeue buffers
3488 */
3489 if (irq->is_qebsm) {
3490 cnt = 1;
3491 start_buf = ((qidx+QDIO_MAX_BUFFERS_PER_Q-1) &
3492 (QDIO_MAX_BUFFERS_PER_Q-1));
3493 qdio_do_eqbs(q, &state, &start_buf, &cnt);
3494 } else
3495 state = q->slsb.acc.val[(qidx+QDIO_MAX_BUFFERS_PER_Q-1)
3496 &(QDIO_MAX_BUFFERS_PER_Q-1) ];
3497 if (state != SLSB_CU_OUTPUT_PRIMED) {
3498 qdio_kick_outbound_q(q);
3499 } else {
3500 QDIO_DBF_TEXT3(0,trace, "fast-req");
3501 #ifdef QDIO_PERFORMANCE_STATS
3502 perf_stats.fast_reqs++;
3503 #endif /* QDIO_PERFORMANCE_STATS */
3504 }
3505 }
3506 /*
3507 * only marking the q could take too long,
3508 * the upper layer module could do a lot of
3509 * traffic in that time
3510 */
3511 __qdio_outbound_processing(q);
3512 }
3513
3514 #ifdef QDIO_PERFORMANCE_STATS
3515 perf_stats.outbound_time+=NOW-perf_stats.start_time_outbound;
3516 perf_stats.outbound_cnt++;
3517 #endif /* QDIO_PERFORMANCE_STATS */
3518 }
3519
3520 /* count must be 1 in iqdio */
3521 int
3522 do_QDIO(struct ccw_device *cdev,unsigned int callflags,
3523 unsigned int queue_number, unsigned int qidx,
3524 unsigned int count,struct qdio_buffer *buffers)
3525 {
3526 struct qdio_irq *irq_ptr;
3527 #ifdef CONFIG_QDIO_DEBUG
3528 char dbf_text[20];
3529
3530 sprintf(dbf_text,"doQD%04x",cdev->private->sch_no);
3531 QDIO_DBF_TEXT3(0,trace,dbf_text);
3532 #endif /* CONFIG_QDIO_DEBUG */
3533
3534 if ( (qidx>QDIO_MAX_BUFFERS_PER_Q) ||
3535 (count>QDIO_MAX_BUFFERS_PER_Q) ||
3536 (queue_number>QDIO_MAX_QUEUES_PER_IRQ) )
3537 return -EINVAL;
3538
3539 if (count==0)
3540 return 0;
3541
3542 irq_ptr = cdev->private->qdio_data;
3543 if (!irq_ptr)
3544 return -ENODEV;
3545
3546 #ifdef CONFIG_QDIO_DEBUG
3547 if (callflags&QDIO_FLAG_SYNC_INPUT)
3548 QDIO_DBF_HEX3(0,trace,&irq_ptr->input_qs[queue_number],
3549 sizeof(void*));
3550 else
3551 QDIO_DBF_HEX3(0,trace,&irq_ptr->output_qs[queue_number],
3552 sizeof(void*));
3553 sprintf(dbf_text,"flag%04x",callflags);
3554 QDIO_DBF_TEXT3(0,trace,dbf_text);
3555 sprintf(dbf_text,"qi%02xct%02x",qidx,count);
3556 QDIO_DBF_TEXT3(0,trace,dbf_text);
3557 #endif /* CONFIG_QDIO_DEBUG */
3558
3559 if (irq_ptr->state!=QDIO_IRQ_STATE_ACTIVE)
3560 return -EBUSY;
3561
3562 if (callflags&QDIO_FLAG_SYNC_INPUT)
3563 do_qdio_handle_inbound(irq_ptr->input_qs[queue_number],
3564 callflags, qidx, count, buffers);
3565 else if (callflags&QDIO_FLAG_SYNC_OUTPUT)
3566 do_qdio_handle_outbound(irq_ptr->output_qs[queue_number],
3567 callflags, qidx, count, buffers);
3568 else {
3569 QDIO_DBF_TEXT3(1,trace,"doQD:inv");
3570 return -EINVAL;
3571 }
3572 return 0;
3573 }
3574
3575 #ifdef QDIO_PERFORMANCE_STATS
3576 static int
3577 qdio_perf_procfile_read(char *buffer, char **buffer_location, off_t offset,
3578 int buffer_length, int *eof, void *data)
3579 {
3580 int c=0;
3581
3582 /* we are always called with buffer_length=4k, so we all
3583 deliver on the first read */
3584 if (offset>0)
3585 return 0;
3586
3587 #define _OUTP_IT(x...) c+=sprintf(buffer+c,x)
3588 _OUTP_IT("i_p_nc/c=%lu/%lu\n",i_p_nc,i_p_c);
3589 _OUTP_IT("ii_p_nc/c=%lu/%lu\n",ii_p_nc,ii_p_c);
3590 _OUTP_IT("o_p_nc/c=%lu/%lu\n",o_p_nc,o_p_c);
3591 _OUTP_IT("Number of tasklet runs (total) : %u\n",
3592 perf_stats.tl_runs);
3593 _OUTP_IT("\n");
3594 _OUTP_IT("Number of SIGA sync's issued : %u\n",
3595 perf_stats.siga_syncs);
3596 _OUTP_IT("Number of SIGA in's issued : %u\n",
3597 perf_stats.siga_ins);
3598 _OUTP_IT("Number of SIGA out's issued : %u\n",
3599 perf_stats.siga_outs);
3600 _OUTP_IT("Number of PCIs caught : %u\n",
3601 perf_stats.pcis);
3602 _OUTP_IT("Number of adapter interrupts caught : %u\n",
3603 perf_stats.thinints);
3604 _OUTP_IT("Number of fast requeues (outg. SBALs w/o SIGA) : %u\n",
3605 perf_stats.fast_reqs);
3606 _OUTP_IT("\n");
3607 _OUTP_IT("Total time of all inbound actions (us) incl. UL : %u\n",
3608 perf_stats.inbound_time);
3609 _OUTP_IT("Number of inbound transfers : %u\n",
3610 perf_stats.inbound_cnt);
3611 _OUTP_IT("Total time of all outbound do_QDIOs (us) : %u\n",
3612 perf_stats.outbound_time);
3613 _OUTP_IT("Number of do_QDIOs outbound : %u\n",
3614 perf_stats.outbound_cnt);
3615 _OUTP_IT("\n");
3616
3617 return c;
3618 }
3619
3620 static struct proc_dir_entry *qdio_perf_proc_file;
3621 #endif /* QDIO_PERFORMANCE_STATS */
3622
3623 static void
3624 qdio_add_procfs_entry(void)
3625 {
3626 #ifdef QDIO_PERFORMANCE_STATS
3627 proc_perf_file_registration=0;
3628 qdio_perf_proc_file=create_proc_entry(QDIO_PERF,
3629 S_IFREG|0444,&proc_root);
3630 if (qdio_perf_proc_file) {
3631 qdio_perf_proc_file->read_proc=&qdio_perf_procfile_read;
3632 } else proc_perf_file_registration=-1;
3633
3634 if (proc_perf_file_registration)
3635 QDIO_PRINT_WARN("was not able to register perf. " \
3636 "proc-file (%i).\n",
3637 proc_perf_file_registration);
3638 #endif /* QDIO_PERFORMANCE_STATS */
3639 }
3640
3641 static void
3642 qdio_remove_procfs_entry(void)
3643 {
3644 #ifdef QDIO_PERFORMANCE_STATS
3645 perf_stats.tl_runs=0;
3646
3647 if (!proc_perf_file_registration) /* means if it went ok earlier */
3648 remove_proc_entry(QDIO_PERF,&proc_root);
3649 #endif /* QDIO_PERFORMANCE_STATS */
3650 }
3651
3652 static void
3653 tiqdio_register_thinints(void)
3654 {
3655 char dbf_text[20];
3656 register_thinint_result=
3657 s390_register_adapter_interrupt(&tiqdio_thinint_handler);
3658 if (register_thinint_result) {
3659 sprintf(dbf_text,"regthn%x",(register_thinint_result&0xff));
3660 QDIO_DBF_TEXT0(0,setup,dbf_text);
3661 QDIO_PRINT_ERR("failed to register adapter handler " \
3662 "(rc=%i).\nAdapter interrupts might " \
3663 "not work. Continuing.\n",
3664 register_thinint_result);
3665 }
3666 }
3667
3668 static void
3669 tiqdio_unregister_thinints(void)
3670 {
3671 if (!register_thinint_result)
3672 s390_unregister_adapter_interrupt(&tiqdio_thinint_handler);
3673 }
3674
3675 static int
3676 qdio_get_qdio_memory(void)
3677 {
3678 int i;
3679 indicator_used[0]=1;
3680
3681 for (i=1;i<INDICATORS_PER_CACHELINE;i++)
3682 indicator_used[i]=0;
3683 indicators = kzalloc(sizeof(__u32)*(INDICATORS_PER_CACHELINE),
3684 GFP_KERNEL);
3685 if (!indicators)
3686 return -ENOMEM;
3687 return 0;
3688 }
3689
3690 static void
3691 qdio_release_qdio_memory(void)
3692 {
3693 kfree(indicators);
3694 }
3695
3696 static void
3697 qdio_unregister_dbf_views(void)
3698 {
3699 if (qdio_dbf_setup)
3700 debug_unregister(qdio_dbf_setup);
3701 if (qdio_dbf_sbal)
3702 debug_unregister(qdio_dbf_sbal);
3703 if (qdio_dbf_sense)
3704 debug_unregister(qdio_dbf_sense);
3705 if (qdio_dbf_trace)
3706 debug_unregister(qdio_dbf_trace);
3707 #ifdef CONFIG_QDIO_DEBUG
3708 if (qdio_dbf_slsb_out)
3709 debug_unregister(qdio_dbf_slsb_out);
3710 if (qdio_dbf_slsb_in)
3711 debug_unregister(qdio_dbf_slsb_in);
3712 #endif /* CONFIG_QDIO_DEBUG */
3713 }
3714
3715 static int
3716 qdio_register_dbf_views(void)
3717 {
3718 qdio_dbf_setup=debug_register(QDIO_DBF_SETUP_NAME,
3719 QDIO_DBF_SETUP_PAGES,
3720 QDIO_DBF_SETUP_NR_AREAS,
3721 QDIO_DBF_SETUP_LEN);
3722 if (!qdio_dbf_setup)
3723 goto oom;
3724 debug_register_view(qdio_dbf_setup,&debug_hex_ascii_view);
3725 debug_set_level(qdio_dbf_setup,QDIO_DBF_SETUP_LEVEL);
3726
3727 qdio_dbf_sbal=debug_register(QDIO_DBF_SBAL_NAME,
3728 QDIO_DBF_SBAL_PAGES,
3729 QDIO_DBF_SBAL_NR_AREAS,
3730 QDIO_DBF_SBAL_LEN);
3731 if (!qdio_dbf_sbal)
3732 goto oom;
3733
3734 debug_register_view(qdio_dbf_sbal,&debug_hex_ascii_view);
3735 debug_set_level(qdio_dbf_sbal,QDIO_DBF_SBAL_LEVEL);
3736
3737 qdio_dbf_sense=debug_register(QDIO_DBF_SENSE_NAME,
3738 QDIO_DBF_SENSE_PAGES,
3739 QDIO_DBF_SENSE_NR_AREAS,
3740 QDIO_DBF_SENSE_LEN);
3741 if (!qdio_dbf_sense)
3742 goto oom;
3743
3744 debug_register_view(qdio_dbf_sense,&debug_hex_ascii_view);
3745 debug_set_level(qdio_dbf_sense,QDIO_DBF_SENSE_LEVEL);
3746
3747 qdio_dbf_trace=debug_register(QDIO_DBF_TRACE_NAME,
3748 QDIO_DBF_TRACE_PAGES,
3749 QDIO_DBF_TRACE_NR_AREAS,
3750 QDIO_DBF_TRACE_LEN);
3751 if (!qdio_dbf_trace)
3752 goto oom;
3753
3754 debug_register_view(qdio_dbf_trace,&debug_hex_ascii_view);
3755 debug_set_level(qdio_dbf_trace,QDIO_DBF_TRACE_LEVEL);
3756
3757 #ifdef CONFIG_QDIO_DEBUG
3758 qdio_dbf_slsb_out=debug_register(QDIO_DBF_SLSB_OUT_NAME,
3759 QDIO_DBF_SLSB_OUT_PAGES,
3760 QDIO_DBF_SLSB_OUT_NR_AREAS,
3761 QDIO_DBF_SLSB_OUT_LEN);
3762 if (!qdio_dbf_slsb_out)
3763 goto oom;
3764 debug_register_view(qdio_dbf_slsb_out,&debug_hex_ascii_view);
3765 debug_set_level(qdio_dbf_slsb_out,QDIO_DBF_SLSB_OUT_LEVEL);
3766
3767 qdio_dbf_slsb_in=debug_register(QDIO_DBF_SLSB_IN_NAME,
3768 QDIO_DBF_SLSB_IN_PAGES,
3769 QDIO_DBF_SLSB_IN_NR_AREAS,
3770 QDIO_DBF_SLSB_IN_LEN);
3771 if (!qdio_dbf_slsb_in)
3772 goto oom;
3773 debug_register_view(qdio_dbf_slsb_in,&debug_hex_ascii_view);
3774 debug_set_level(qdio_dbf_slsb_in,QDIO_DBF_SLSB_IN_LEVEL);
3775 #endif /* CONFIG_QDIO_DEBUG */
3776 return 0;
3777 oom:
3778 QDIO_PRINT_ERR("not enough memory for dbf.\n");
3779 qdio_unregister_dbf_views();
3780 return -ENOMEM;
3781 }
3782
3783 static int __init
3784 init_QDIO(void)
3785 {
3786 int res;
3787 #ifdef QDIO_PERFORMANCE_STATS
3788 void *ptr;
3789 #endif /* QDIO_PERFORMANCE_STATS */
3790
3791 printk("qdio: loading %s\n",version);
3792
3793 res=qdio_get_qdio_memory();
3794 if (res)
3795 return res;
3796
3797 res = qdio_register_dbf_views();
3798 if (res)
3799 return res;
3800
3801 QDIO_DBF_TEXT0(0,setup,"initQDIO");
3802
3803 #ifdef QDIO_PERFORMANCE_STATS
3804 memset((void*)&perf_stats,0,sizeof(perf_stats));
3805 QDIO_DBF_TEXT0(0,setup,"perfstat");
3806 ptr=&perf_stats;
3807 QDIO_DBF_HEX0(0,setup,&ptr,sizeof(void*));
3808 #endif /* QDIO_PERFORMANCE_STATS */
3809
3810 qdio_add_procfs_entry();
3811
3812 if (tiqdio_check_chsc_availability())
3813 QDIO_PRINT_ERR("Not all CHSCs supported. Continuing.\n");
3814
3815 tiqdio_register_thinints();
3816
3817 return 0;
3818 }
3819
3820 static void __exit
3821 cleanup_QDIO(void)
3822 {
3823 tiqdio_unregister_thinints();
3824 qdio_remove_procfs_entry();
3825 qdio_release_qdio_memory();
3826 qdio_unregister_dbf_views();
3827
3828 printk("qdio: %s: module removed\n",version);
3829 }
3830
3831 module_init(init_QDIO);
3832 module_exit(cleanup_QDIO);
3833
3834 EXPORT_SYMBOL(qdio_allocate);
3835 EXPORT_SYMBOL(qdio_establish);
3836 EXPORT_SYMBOL(qdio_initialize);
3837 EXPORT_SYMBOL(qdio_activate);
3838 EXPORT_SYMBOL(do_QDIO);
3839 EXPORT_SYMBOL(qdio_shutdown);
3840 EXPORT_SYMBOL(qdio_free);
3841 EXPORT_SYMBOL(qdio_cleanup);
3842 EXPORT_SYMBOL(qdio_synchronize);
kernel source for telekom puls (alcatel/mediatek)