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[S390] runtime switch for qdio performance statistics
[deliverable/linux.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/module.h>
34 #include <linux/init.h>
35
36 #include <linux/slab.h>
37 #include <linux/kernel.h>
38 #include <linux/proc_fs.h>
39 #include <linux/timer.h>
40 #include <linux/mempool.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/s390_rdev.h>
50 #include <asm/qdio.h>
51
52 #include "cio.h"
53 #include "css.h"
54 #include "device.h"
55 #include "airq.h"
56 #include "qdio.h"
57 #include "ioasm.h"
58 #include "chsc.h"
59
60 /****************** MODULE PARAMETER VARIABLES ********************/
61 MODULE_AUTHOR("Utz Bacher <utz.bacher@de.ibm.com>");
62 MODULE_DESCRIPTION("QDIO base support version 2, " \
63 "Copyright 2000 IBM Corporation");
64 MODULE_LICENSE("GPL");
65
66 /******************** HERE WE GO ***********************************/
67
68 static const char version[] = "QDIO base support version 2";
69 extern struct bus_type ccw_bus_type;
70
71 static int qdio_performance_stats = 0;
72 static int proc_perf_file_registration;
73 static unsigned long i_p_c, i_p_nc, o_p_c, o_p_nc, ii_p_c, ii_p_nc;
74 static struct qdio_perf_stats perf_stats;
75
76 static int hydra_thinints;
77 static int is_passthrough = 0;
78 static int omit_svs;
79
80 static int indicator_used[INDICATORS_PER_CACHELINE];
81 static __u32 * volatile indicators;
82 static __u32 volatile spare_indicator;
83 static atomic_t spare_indicator_usecount;
84 #define QDIO_MEMPOOL_SCSSC_ELEMENTS 2
85 static mempool_t *qdio_mempool_scssc;
86
87 static debug_info_t *qdio_dbf_setup;
88 static debug_info_t *qdio_dbf_sbal;
89 static debug_info_t *qdio_dbf_trace;
90 static debug_info_t *qdio_dbf_sense;
91 #ifdef CONFIG_QDIO_DEBUG
92 static debug_info_t *qdio_dbf_slsb_out;
93 static debug_info_t *qdio_dbf_slsb_in;
94 #endif /* CONFIG_QDIO_DEBUG */
95
96 /* iQDIO stuff: */
97 static volatile struct qdio_q *tiq_list=NULL; /* volatile as it could change
98 during a while loop */
99 static DEFINE_SPINLOCK(ttiq_list_lock);
100 static int register_thinint_result;
101 static void tiqdio_tl(unsigned long);
102 static DECLARE_TASKLET(tiqdio_tasklet,tiqdio_tl,0);
103
104 /* not a macro, as one of the arguments is atomic_read */
105 static inline int
106 qdio_min(int a,int b)
107 {
108 if (a<b)
109 return a;
110 else
111 return b;
112 }
113
114 /***************** SCRUBBER HELPER ROUTINES **********************/
115
116 static inline __u64
117 qdio_get_micros(void)
118 {
119 return (get_clock() >> 12); /* time>>12 is microseconds */
120 }
121
122 /*
123 * unfortunately, we can't just xchg the values; in do_QDIO we want to reserve
124 * the q in any case, so that we'll not be interrupted when we are in
125 * qdio_mark_tiq... shouldn't have a really bad impact, as reserving almost
126 * ever works (last famous words)
127 */
128 static inline int
129 qdio_reserve_q(struct qdio_q *q)
130 {
131 return atomic_add_return(1,&q->use_count) - 1;
132 }
133
134 static inline void
135 qdio_release_q(struct qdio_q *q)
136 {
137 atomic_dec(&q->use_count);
138 }
139
140 /*check ccq */
141 static inline int
142 qdio_check_ccq(struct qdio_q *q, unsigned int ccq)
143 {
144 char dbf_text[15];
145
146 if (ccq == 0 || ccq == 32 || ccq == 96)
147 return 0;
148 if (ccq == 97)
149 return 1;
150 /*notify devices immediately*/
151 sprintf(dbf_text,"%d", ccq);
152 QDIO_DBF_TEXT2(1,trace,dbf_text);
153 return -EIO;
154 }
155 /* EQBS: extract buffer states */
156 static inline int
157 qdio_do_eqbs(struct qdio_q *q, unsigned char *state,
158 unsigned int *start, unsigned int *cnt)
159 {
160 struct qdio_irq *irq;
161 unsigned int tmp_cnt, q_no, ccq;
162 int rc ;
163 char dbf_text[15];
164
165 ccq = 0;
166 tmp_cnt = *cnt;
167 irq = (struct qdio_irq*)q->irq_ptr;
168 q_no = q->q_no;
169 if(!q->is_input_q)
170 q_no += irq->no_input_qs;
171 again:
172 ccq = do_eqbs(irq->sch_token, state, q_no, start, cnt);
173 rc = qdio_check_ccq(q, ccq);
174 if (rc == 1) {
175 QDIO_DBF_TEXT5(1,trace,"eqAGAIN");
176 goto again;
177 }
178 if (rc < 0) {
179 QDIO_DBF_TEXT2(1,trace,"eqberr");
180 sprintf(dbf_text,"%2x,%2x,%d,%d",tmp_cnt, *cnt, ccq, q_no);
181 QDIO_DBF_TEXT2(1,trace,dbf_text);
182 q->handler(q->cdev,QDIO_STATUS_ACTIVATE_CHECK_CONDITION|
183 QDIO_STATUS_LOOK_FOR_ERROR,
184 0, 0, 0, -1, -1, q->int_parm);
185 return 0;
186 }
187 return (tmp_cnt - *cnt);
188 }
189
190 /* SQBS: set buffer states */
191 static inline int
192 qdio_do_sqbs(struct qdio_q *q, unsigned char state,
193 unsigned int *start, unsigned int *cnt)
194 {
195 struct qdio_irq *irq;
196 unsigned int tmp_cnt, q_no, ccq;
197 int rc;
198 char dbf_text[15];
199
200 ccq = 0;
201 tmp_cnt = *cnt;
202 irq = (struct qdio_irq*)q->irq_ptr;
203 q_no = q->q_no;
204 if(!q->is_input_q)
205 q_no += irq->no_input_qs;
206 again:
207 ccq = do_sqbs(irq->sch_token, state, q_no, start, cnt);
208 rc = qdio_check_ccq(q, ccq);
209 if (rc == 1) {
210 QDIO_DBF_TEXT5(1,trace,"sqAGAIN");
211 goto again;
212 }
213 if (rc < 0) {
214 QDIO_DBF_TEXT3(1,trace,"sqberr");
215 sprintf(dbf_text,"%2x,%2x,%d,%d",tmp_cnt,*cnt,ccq,q_no);
216 QDIO_DBF_TEXT3(1,trace,dbf_text);
217 q->handler(q->cdev,QDIO_STATUS_ACTIVATE_CHECK_CONDITION|
218 QDIO_STATUS_LOOK_FOR_ERROR,
219 0, 0, 0, -1, -1, q->int_parm);
220 return 0;
221 }
222 return (tmp_cnt - *cnt);
223 }
224
225 static inline int
226 qdio_set_slsb(struct qdio_q *q, unsigned int *bufno,
227 unsigned char state, unsigned int *count)
228 {
229 volatile char *slsb;
230 struct qdio_irq *irq;
231
232 irq = (struct qdio_irq*)q->irq_ptr;
233 if (!irq->is_qebsm) {
234 slsb = (char *)&q->slsb.acc.val[(*bufno)];
235 xchg(slsb, state);
236 return 1;
237 }
238 return qdio_do_sqbs(q, state, bufno, count);
239 }
240
241 #ifdef CONFIG_QDIO_DEBUG
242 static inline void
243 qdio_trace_slsb(struct qdio_q *q)
244 {
245 if (q->queue_type==QDIO_TRACE_QTYPE) {
246 if (q->is_input_q)
247 QDIO_DBF_HEX2(0,slsb_in,&q->slsb,
248 QDIO_MAX_BUFFERS_PER_Q);
249 else
250 QDIO_DBF_HEX2(0,slsb_out,&q->slsb,
251 QDIO_MAX_BUFFERS_PER_Q);
252 }
253 }
254 #endif
255
256 static inline int
257 set_slsb(struct qdio_q *q, unsigned int *bufno,
258 unsigned char state, unsigned int *count)
259 {
260 int rc;
261 #ifdef CONFIG_QDIO_DEBUG
262 qdio_trace_slsb(q);
263 #endif
264 rc = qdio_set_slsb(q, bufno, state, count);
265 #ifdef CONFIG_QDIO_DEBUG
266 qdio_trace_slsb(q);
267 #endif
268 return rc;
269 }
270 static inline int
271 qdio_siga_sync(struct qdio_q *q, unsigned int gpr2,
272 unsigned int gpr3)
273 {
274 int cc;
275
276 QDIO_DBF_TEXT4(0,trace,"sigasync");
277 QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
278
279 if (qdio_performance_stats)
280 perf_stats.siga_syncs++;
281
282 cc = do_siga_sync(q->schid, gpr2, gpr3);
283 if (cc)
284 QDIO_DBF_HEX3(0,trace,&cc,sizeof(int*));
285
286 return cc;
287 }
288
289 static inline int
290 qdio_siga_sync_q(struct qdio_q *q)
291 {
292 if (q->is_input_q)
293 return qdio_siga_sync(q, 0, q->mask);
294 return qdio_siga_sync(q, q->mask, 0);
295 }
296
297 static int
298 __do_siga_output(struct qdio_q *q, unsigned int *busy_bit)
299 {
300 struct qdio_irq *irq;
301 unsigned int fc = 0;
302 unsigned long schid;
303
304 irq = (struct qdio_irq *) q->irq_ptr;
305 if (!irq->is_qebsm)
306 schid = *((u32 *)&q->schid);
307 else {
308 schid = irq->sch_token;
309 fc |= 0x80;
310 }
311 return do_siga_output(schid, q->mask, busy_bit, fc);
312 }
313
314 /*
315 * returns QDIO_SIGA_ERROR_ACCESS_EXCEPTION as cc, when SIGA returns
316 * an access exception
317 */
318 static inline int
319 qdio_siga_output(struct qdio_q *q)
320 {
321 int cc;
322 __u32 busy_bit;
323 __u64 start_time=0;
324
325 if (qdio_performance_stats)
326 perf_stats.siga_outs++;
327
328 QDIO_DBF_TEXT4(0,trace,"sigaout");
329 QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
330
331 for (;;) {
332 cc = __do_siga_output(q, &busy_bit);
333 //QDIO_PRINT_ERR("cc=%x, busy=%x\n",cc,busy_bit);
334 if ((cc==2) && (busy_bit) && (q->is_iqdio_q)) {
335 if (!start_time)
336 start_time=NOW;
337 if ((NOW-start_time)>QDIO_BUSY_BIT_PATIENCE)
338 break;
339 } else
340 break;
341 }
342
343 if ((cc==2) && (busy_bit))
344 cc |= QDIO_SIGA_ERROR_B_BIT_SET;
345
346 if (cc)
347 QDIO_DBF_HEX3(0,trace,&cc,sizeof(int*));
348
349 return cc;
350 }
351
352 static inline int
353 qdio_siga_input(struct qdio_q *q)
354 {
355 int cc;
356
357 QDIO_DBF_TEXT4(0,trace,"sigain");
358 QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
359
360 if (qdio_performance_stats)
361 perf_stats.siga_ins++;
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_xchg(&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 if (qdio_performance_stats)
956 o_p_c++;
957 /* as we're sissies, we'll check next time */
958 if (likely(!atomic_read(&q->is_in_shutdown))) {
959 qdio_mark_q(q);
960 QDIO_DBF_TEXT4(0,trace,"busy,agn");
961 }
962 return;
963 }
964 if (qdio_performance_stats) {
965 o_p_nc++;
966 perf_stats.tl_runs++;
967 }
968
969 /* see comment in qdio_kick_outbound_q */
970 siga_attempts=atomic_read(&q->busy_siga_counter);
971 while (siga_attempts) {
972 atomic_dec(&q->busy_siga_counter);
973 qdio_kick_outbound_q(q);
974 siga_attempts--;
975 }
976
977 if (qdio_has_outbound_q_moved(q))
978 qdio_kick_outbound_handler(q);
979
980 if (q->is_iqdio_q) {
981 /*
982 * for asynchronous queues, we better check, if the fill
983 * level is too high. for synchronous queues, the fill
984 * level will never be that high.
985 */
986 if (atomic_read(&q->number_of_buffers_used)>
987 IQDIO_FILL_LEVEL_TO_POLL)
988 qdio_mark_q(q);
989
990 } else if (!q->hydra_gives_outbound_pcis)
991 if (!qdio_is_outbound_q_done(q))
992 qdio_mark_q(q);
993
994 qdio_release_q(q);
995 }
996
997 static void
998 qdio_outbound_processing(struct qdio_q *q)
999 {
1000 __qdio_outbound_processing(q);
1001 }
1002
1003 /************************* INBOUND ROUTINES *******************************/
1004
1005
1006 static inline int
1007 qdio_get_inbound_buffer_frontier(struct qdio_q *q)
1008 {
1009 struct qdio_irq *irq;
1010 int f,f_mod_no;
1011 volatile char *slsb;
1012 unsigned int count = 1;
1013 int first_not_to_check;
1014 #ifdef CONFIG_QDIO_DEBUG
1015 char dbf_text[15];
1016 #endif /* CONFIG_QDIO_DEBUG */
1017 #ifdef QDIO_USE_PROCESSING_STATE
1018 int last_position=-1;
1019 #endif /* QDIO_USE_PROCESSING_STATE */
1020
1021 QDIO_DBF_TEXT4(0,trace,"getibfro");
1022 QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
1023
1024 irq = (struct qdio_irq *) q->irq_ptr;
1025 if (irq->is_qebsm)
1026 return qdio_qebsm_get_inbound_buffer_frontier(q);
1027
1028 slsb=&q->slsb.acc.val[0];
1029 f_mod_no=f=q->first_to_check;
1030 /*
1031 * we don't check 128 buffers, as otherwise qdio_has_inbound_q_moved
1032 * would return 0
1033 */
1034 first_not_to_check=f+qdio_min(atomic_read(&q->number_of_buffers_used),
1035 (QDIO_MAX_BUFFERS_PER_Q-1));
1036
1037 /*
1038 * we don't use this one, as a PCI or we after a thin interrupt
1039 * will sync the queues
1040 */
1041 /* SYNC_MEMORY;*/
1042
1043 check_next:
1044 f_mod_no=f&(QDIO_MAX_BUFFERS_PER_Q-1);
1045 if (f==first_not_to_check)
1046 goto out;
1047 switch (slsb[f_mod_no]) {
1048
1049 /* CU_EMPTY means frontier is reached */
1050 case SLSB_CU_INPUT_EMPTY:
1051 QDIO_DBF_TEXT5(0,trace,"inptempt");
1052 break;
1053
1054 /* P_PRIMED means set slsb to P_PROCESSING and move on */
1055 case SLSB_P_INPUT_PRIMED:
1056 QDIO_DBF_TEXT5(0,trace,"inptprim");
1057
1058 #ifdef QDIO_USE_PROCESSING_STATE
1059 /*
1060 * as soon as running under VM, polling the input queues will
1061 * kill VM in terms of CP overhead
1062 */
1063 if (q->siga_sync) {
1064 set_slsb(q, &f_mod_no, SLSB_P_INPUT_NOT_INIT, &count);
1065 } else {
1066 /* set the previous buffer to NOT_INIT. The current
1067 * buffer will be set to PROCESSING at the end of
1068 * this function to avoid further interrupts. */
1069 if (last_position>=0)
1070 set_slsb(q, &last_position,
1071 SLSB_P_INPUT_NOT_INIT, &count);
1072 atomic_set(&q->polling,1);
1073 last_position=f_mod_no;
1074 }
1075 #else /* QDIO_USE_PROCESSING_STATE */
1076 set_slsb(q, &f_mod_no, SLSB_P_INPUT_NOT_INIT, &count);
1077 #endif /* QDIO_USE_PROCESSING_STATE */
1078 /*
1079 * not needed, as the inbound queue will be synced on the next
1080 * siga-r, resp. tiqdio_is_inbound_q_done will do the siga-s
1081 */
1082 /*SYNC_MEMORY;*/
1083 f++;
1084 atomic_dec(&q->number_of_buffers_used);
1085 goto check_next;
1086
1087 case SLSB_P_INPUT_NOT_INIT:
1088 case SLSB_P_INPUT_PROCESSING:
1089 QDIO_DBF_TEXT5(0,trace,"inpnipro");
1090 break;
1091
1092 /* P_ERROR means frontier is reached, break and report error */
1093 case SLSB_P_INPUT_ERROR:
1094 #ifdef CONFIG_QDIO_DEBUG
1095 sprintf(dbf_text,"inperr%2x",f_mod_no);
1096 QDIO_DBF_TEXT3(1,trace,dbf_text);
1097 #endif /* CONFIG_QDIO_DEBUG */
1098 QDIO_DBF_HEX2(1,sbal,q->sbal[f_mod_no],256);
1099
1100 /* kind of process the buffer */
1101 set_slsb(q, &f_mod_no, SLSB_P_INPUT_NOT_INIT, &count);
1102
1103 if (q->qdio_error)
1104 q->error_status_flags|=
1105 QDIO_STATUS_MORE_THAN_ONE_QDIO_ERROR;
1106 q->qdio_error=SLSB_P_INPUT_ERROR;
1107 q->error_status_flags|=QDIO_STATUS_LOOK_FOR_ERROR;
1108
1109 /* we increment the frontier, as this buffer
1110 * was processed obviously */
1111 f_mod_no=(f_mod_no+1)&(QDIO_MAX_BUFFERS_PER_Q-1);
1112 atomic_dec(&q->number_of_buffers_used);
1113
1114 #ifdef QDIO_USE_PROCESSING_STATE
1115 last_position=-1;
1116 #endif /* QDIO_USE_PROCESSING_STATE */
1117
1118 break;
1119
1120 /* everything else means frontier not changed (HALTED or so) */
1121 default:
1122 break;
1123 }
1124 out:
1125 q->first_to_check=f_mod_no;
1126
1127 #ifdef QDIO_USE_PROCESSING_STATE
1128 if (last_position>=0)
1129 set_slsb(q, &last_position, SLSB_P_INPUT_PROCESSING, &count);
1130 #endif /* QDIO_USE_PROCESSING_STATE */
1131
1132 QDIO_DBF_HEX4(0,trace,&q->first_to_check,sizeof(int));
1133
1134 return q->first_to_check;
1135 }
1136
1137 static inline int
1138 qdio_has_inbound_q_moved(struct qdio_q *q)
1139 {
1140 int i;
1141
1142 static int old_pcis=0;
1143 static int old_thinints=0;
1144
1145 if (qdio_performance_stats) {
1146 if ((old_pcis==perf_stats.pcis)&&
1147 (old_thinints==perf_stats.thinints))
1148 perf_stats.start_time_inbound=NOW;
1149 else
1150 old_pcis=perf_stats.pcis;
1151 }
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 if (qdio_performance_stats) {
1342 perf_stats.inbound_time+=NOW-perf_stats.start_time_inbound;
1343 perf_stats.inbound_cnt++;
1344 }
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 if (qdio_performance_stats)
1365 ii_p_c++;
1366 /*
1367 * as we might just be about to stop polling, we make
1368 * sure that we check again at least once more
1369 */
1370 tiqdio_sched_tl();
1371 return;
1372 }
1373 if (qdio_performance_stats)
1374 ii_p_nc++;
1375 if (unlikely(atomic_read(&q->is_in_shutdown))) {
1376 qdio_unmark_q(q);
1377 goto out;
1378 }
1379
1380 /*
1381 * we reset spare_ind_was_set, when the queue does not use the
1382 * spare indicator
1383 */
1384 if (spare_ind_was_set)
1385 spare_ind_was_set = (q->dev_st_chg_ind == &spare_indicator);
1386
1387 if (!(*(q->dev_st_chg_ind)) && !spare_ind_was_set)
1388 goto out;
1389 /*
1390 * q->dev_st_chg_ind is the indicator, be it shared or not.
1391 * only clear it, if indicator is non-shared
1392 */
1393 if (!spare_ind_was_set)
1394 tiqdio_clear_summary_bit((__u32*)q->dev_st_chg_ind);
1395
1396 if (q->hydra_gives_outbound_pcis) {
1397 if (!q->siga_sync_done_on_thinints) {
1398 SYNC_MEMORY_ALL;
1399 } else if ((!q->siga_sync_done_on_outb_tis)&&
1400 (q->hydra_gives_outbound_pcis)) {
1401 SYNC_MEMORY_ALL_OUTB;
1402 }
1403 } else {
1404 SYNC_MEMORY;
1405 }
1406 /*
1407 * maybe we have to do work on our outbound queues... at least
1408 * we have to check the outbound-int-capable thinint-capable
1409 * queues
1410 */
1411 if (q->hydra_gives_outbound_pcis) {
1412 irq_ptr = (struct qdio_irq*)q->irq_ptr;
1413 for (i=0;i<irq_ptr->no_output_qs;i++) {
1414 oq = irq_ptr->output_qs[i];
1415 if (!qdio_is_outbound_q_done(oq)) {
1416 if (qdio_performance_stats)
1417 perf_stats.tl_runs--;
1418 __qdio_outbound_processing(oq);
1419 }
1420 }
1421 }
1422
1423 if (!qdio_has_inbound_q_moved(q))
1424 goto out;
1425
1426 qdio_kick_inbound_handler(q);
1427 if (tiqdio_is_inbound_q_done(q))
1428 if (!qdio_stop_polling(q)) {
1429 /*
1430 * we set the flags to get into the stuff next time,
1431 * see also comment in qdio_stop_polling
1432 */
1433 tiqdio_set_summary_bit((__u32*)q->dev_st_chg_ind);
1434 tiqdio_sched_tl();
1435 }
1436 out:
1437 qdio_release_q(q);
1438 }
1439
1440 static void
1441 tiqdio_inbound_processing(struct qdio_q *q)
1442 {
1443 __tiqdio_inbound_processing(q, atomic_read(&spare_indicator_usecount));
1444 }
1445
1446 static inline void
1447 __qdio_inbound_processing(struct qdio_q *q)
1448 {
1449 int q_laps=0;
1450
1451 QDIO_DBF_TEXT4(0,trace,"qinproc");
1452 QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
1453
1454 if (unlikely(qdio_reserve_q(q))) {
1455 qdio_release_q(q);
1456 if (qdio_performance_stats)
1457 i_p_c++;
1458 /* as we're sissies, we'll check next time */
1459 if (likely(!atomic_read(&q->is_in_shutdown))) {
1460 qdio_mark_q(q);
1461 QDIO_DBF_TEXT4(0,trace,"busy,agn");
1462 }
1463 return;
1464 }
1465 if (qdio_performance_stats) {
1466 i_p_nc++;
1467 perf_stats.tl_runs++;
1468 }
1469
1470 again:
1471 if (qdio_has_inbound_q_moved(q)) {
1472 qdio_kick_inbound_handler(q);
1473 if (!qdio_stop_polling(q)) {
1474 q_laps++;
1475 if (q_laps<QDIO_Q_LAPS)
1476 goto again;
1477 }
1478 qdio_mark_q(q);
1479 } else {
1480 if (!qdio_is_inbound_q_done(q))
1481 /* means poll time is not yet over */
1482 qdio_mark_q(q);
1483 }
1484
1485 qdio_release_q(q);
1486 }
1487
1488 static void
1489 qdio_inbound_processing(struct qdio_q *q)
1490 {
1491 __qdio_inbound_processing(q);
1492 }
1493
1494 /************************* MAIN ROUTINES *******************************/
1495
1496 #ifdef QDIO_USE_PROCESSING_STATE
1497 static inline int
1498 tiqdio_reset_processing_state(struct qdio_q *q, int q_laps)
1499 {
1500 if (!q) {
1501 tiqdio_sched_tl();
1502 return 0;
1503 }
1504
1505 /*
1506 * under VM, we have not used the PROCESSING state, so no
1507 * need to stop polling
1508 */
1509 if (q->siga_sync)
1510 return 2;
1511
1512 if (unlikely(qdio_reserve_q(q))) {
1513 qdio_release_q(q);
1514 if (qdio_performance_stats)
1515 ii_p_c++;
1516 /*
1517 * as we might just be about to stop polling, we make
1518 * sure that we check again at least once more
1519 */
1520
1521 /*
1522 * sanity -- we'd get here without setting the
1523 * dev st chg ind
1524 */
1525 tiqdio_set_summary_bit((__u32*)q->dev_st_chg_ind);
1526 tiqdio_sched_tl();
1527 return 0;
1528 }
1529 if (qdio_stop_polling(q)) {
1530 qdio_release_q(q);
1531 return 2;
1532 }
1533 if (q_laps<QDIO_Q_LAPS-1) {
1534 qdio_release_q(q);
1535 return 3;
1536 }
1537 /*
1538 * we set the flags to get into the stuff
1539 * next time, see also comment in qdio_stop_polling
1540 */
1541 tiqdio_set_summary_bit((__u32*)q->dev_st_chg_ind);
1542 tiqdio_sched_tl();
1543 qdio_release_q(q);
1544 return 1;
1545
1546 }
1547 #endif /* QDIO_USE_PROCESSING_STATE */
1548
1549 static inline void
1550 tiqdio_inbound_checks(void)
1551 {
1552 struct qdio_q *q;
1553 int spare_ind_was_set=0;
1554 #ifdef QDIO_USE_PROCESSING_STATE
1555 int q_laps=0;
1556 #endif /* QDIO_USE_PROCESSING_STATE */
1557
1558 QDIO_DBF_TEXT4(0,trace,"iqdinbck");
1559 QDIO_DBF_TEXT5(0,trace,"iqlocsum");
1560
1561 #ifdef QDIO_USE_PROCESSING_STATE
1562 again:
1563 #endif /* QDIO_USE_PROCESSING_STATE */
1564
1565 /* when the spare indicator is used and set, save that and clear it */
1566 if ((atomic_read(&spare_indicator_usecount)) && spare_indicator) {
1567 spare_ind_was_set = 1;
1568 tiqdio_clear_summary_bit((__u32*)&spare_indicator);
1569 }
1570
1571 q=(struct qdio_q*)tiq_list;
1572 do {
1573 if (!q)
1574 break;
1575 __tiqdio_inbound_processing(q, spare_ind_was_set);
1576 q=(struct qdio_q*)q->list_next;
1577 } while (q!=(struct qdio_q*)tiq_list);
1578
1579 #ifdef QDIO_USE_PROCESSING_STATE
1580 q=(struct qdio_q*)tiq_list;
1581 do {
1582 int ret;
1583
1584 ret = tiqdio_reset_processing_state(q, q_laps);
1585 switch (ret) {
1586 case 0:
1587 return;
1588 case 1:
1589 q_laps++;
1590 case 2:
1591 q = (struct qdio_q*)q->list_next;
1592 break;
1593 default:
1594 q_laps++;
1595 goto again;
1596 }
1597 } while (q!=(struct qdio_q*)tiq_list);
1598 #endif /* QDIO_USE_PROCESSING_STATE */
1599 }
1600
1601 static void
1602 tiqdio_tl(unsigned long data)
1603 {
1604 QDIO_DBF_TEXT4(0,trace,"iqdio_tl");
1605
1606 if (qdio_performance_stats)
1607 perf_stats.tl_runs++;
1608
1609 tiqdio_inbound_checks();
1610 }
1611
1612 /********************* GENERAL HELPER_ROUTINES ***********************/
1613
1614 static void
1615 qdio_release_irq_memory(struct qdio_irq *irq_ptr)
1616 {
1617 int i;
1618
1619 for (i=0;i<QDIO_MAX_QUEUES_PER_IRQ;i++) {
1620 if (!irq_ptr->input_qs[i])
1621 goto next;
1622
1623 kfree(irq_ptr->input_qs[i]->slib);
1624 kfree(irq_ptr->input_qs[i]);
1625
1626 next:
1627 if (!irq_ptr->output_qs[i])
1628 continue;
1629
1630 kfree(irq_ptr->output_qs[i]->slib);
1631 kfree(irq_ptr->output_qs[i]);
1632
1633 }
1634 kfree(irq_ptr->qdr);
1635 free_page((unsigned long) irq_ptr);
1636 }
1637
1638 static void
1639 qdio_set_impl_params(struct qdio_irq *irq_ptr,
1640 unsigned int qib_param_field_format,
1641 /* pointer to 128 bytes or NULL, if no param field */
1642 unsigned char *qib_param_field,
1643 /* pointer to no_queues*128 words of data or NULL */
1644 unsigned int no_input_qs,
1645 unsigned int no_output_qs,
1646 unsigned long *input_slib_elements,
1647 unsigned long *output_slib_elements)
1648 {
1649 int i,j;
1650
1651 if (!irq_ptr)
1652 return;
1653
1654 irq_ptr->qib.pfmt=qib_param_field_format;
1655 if (qib_param_field)
1656 memcpy(irq_ptr->qib.parm,qib_param_field,
1657 QDIO_MAX_BUFFERS_PER_Q);
1658
1659 if (input_slib_elements)
1660 for (i=0;i<no_input_qs;i++) {
1661 for (j=0;j<QDIO_MAX_BUFFERS_PER_Q;j++)
1662 irq_ptr->input_qs[i]->slib->slibe[j].parms=
1663 input_slib_elements[
1664 i*QDIO_MAX_BUFFERS_PER_Q+j];
1665 }
1666 if (output_slib_elements)
1667 for (i=0;i<no_output_qs;i++) {
1668 for (j=0;j<QDIO_MAX_BUFFERS_PER_Q;j++)
1669 irq_ptr->output_qs[i]->slib->slibe[j].parms=
1670 output_slib_elements[
1671 i*QDIO_MAX_BUFFERS_PER_Q+j];
1672 }
1673 }
1674
1675 static int
1676 qdio_alloc_qs(struct qdio_irq *irq_ptr,
1677 int no_input_qs, int no_output_qs)
1678 {
1679 int i;
1680 struct qdio_q *q;
1681 int result=-ENOMEM;
1682
1683 for (i=0;i<no_input_qs;i++) {
1684 q = kzalloc(sizeof(struct qdio_q), GFP_KERNEL);
1685
1686 if (!q) {
1687 QDIO_PRINT_ERR("kmalloc of q failed!\n");
1688 goto out;
1689 }
1690
1691 q->slib = kmalloc(PAGE_SIZE, GFP_KERNEL);
1692 if (!q->slib) {
1693 QDIO_PRINT_ERR("kmalloc of slib failed!\n");
1694 goto out;
1695 }
1696
1697 irq_ptr->input_qs[i]=q;
1698 }
1699
1700 for (i=0;i<no_output_qs;i++) {
1701 q = kzalloc(sizeof(struct qdio_q), GFP_KERNEL);
1702
1703 if (!q) {
1704 goto out;
1705 }
1706
1707 q->slib=kmalloc(PAGE_SIZE,GFP_KERNEL);
1708 if (!q->slib) {
1709 QDIO_PRINT_ERR("kmalloc of slib failed!\n");
1710 goto out;
1711 }
1712
1713 irq_ptr->output_qs[i]=q;
1714 }
1715
1716 result=0;
1717 out:
1718 return result;
1719 }
1720
1721 static void
1722 qdio_fill_qs(struct qdio_irq *irq_ptr, struct ccw_device *cdev,
1723 int no_input_qs, int no_output_qs,
1724 qdio_handler_t *input_handler,
1725 qdio_handler_t *output_handler,
1726 unsigned long int_parm,int q_format,
1727 unsigned long flags,
1728 void **inbound_sbals_array,
1729 void **outbound_sbals_array)
1730 {
1731 struct qdio_q *q;
1732 int i,j;
1733 char dbf_text[20]; /* see qdio_initialize */
1734 void *ptr;
1735 int available;
1736
1737 sprintf(dbf_text,"qfqs%4x",cdev->private->schid.sch_no);
1738 QDIO_DBF_TEXT0(0,setup,dbf_text);
1739 for (i=0;i<no_input_qs;i++) {
1740 q=irq_ptr->input_qs[i];
1741
1742 memset(q,0,((char*)&q->slib)-((char*)q));
1743 sprintf(dbf_text,"in-q%4x",i);
1744 QDIO_DBF_TEXT0(0,setup,dbf_text);
1745 QDIO_DBF_HEX0(0,setup,&q,sizeof(void*));
1746
1747 memset(q->slib,0,PAGE_SIZE);
1748 q->sl=(struct sl*)(((char*)q->slib)+PAGE_SIZE/2);
1749
1750 available=0;
1751
1752 for (j=0;j<QDIO_MAX_BUFFERS_PER_Q;j++)
1753 q->sbal[j]=*(inbound_sbals_array++);
1754
1755 q->queue_type=q_format;
1756 q->int_parm=int_parm;
1757 q->schid = irq_ptr->schid;
1758 q->irq_ptr = irq_ptr;
1759 q->cdev = cdev;
1760 q->mask=1<<(31-i);
1761 q->q_no=i;
1762 q->is_input_q=1;
1763 q->first_to_check=0;
1764 q->last_move_ftc=0;
1765 q->handler=input_handler;
1766 q->dev_st_chg_ind=irq_ptr->dev_st_chg_ind;
1767
1768 q->tasklet.data=(unsigned long)q;
1769 /* q->is_thinint_q isn't valid at this time, but
1770 * irq_ptr->is_thinint_irq is */
1771 q->tasklet.func=(void(*)(unsigned long))
1772 ((irq_ptr->is_thinint_irq)?&tiqdio_inbound_processing:
1773 &qdio_inbound_processing);
1774
1775 /* actually this is not used for inbound queues. yet. */
1776 atomic_set(&q->busy_siga_counter,0);
1777 q->timing.busy_start=0;
1778
1779 /* for (j=0;j<QDIO_STATS_NUMBER;j++)
1780 q->timing.last_transfer_times[j]=(qdio_get_micros()/
1781 QDIO_STATS_NUMBER)*j;
1782 q->timing.last_transfer_index=QDIO_STATS_NUMBER-1;
1783 */
1784
1785 /* fill in slib */
1786 if (i>0) irq_ptr->input_qs[i-1]->slib->nsliba=
1787 (unsigned long)(q->slib);
1788 q->slib->sla=(unsigned long)(q->sl);
1789 q->slib->slsba=(unsigned long)(&q->slsb.acc.val[0]);
1790
1791 /* fill in sl */
1792 for (j=0;j<QDIO_MAX_BUFFERS_PER_Q;j++)
1793 q->sl->element[j].sbal=(unsigned long)(q->sbal[j]);
1794
1795 QDIO_DBF_TEXT2(0,setup,"sl-sb-b0");
1796 ptr=(void*)q->sl;
1797 QDIO_DBF_HEX2(0,setup,&ptr,sizeof(void*));
1798 ptr=(void*)&q->slsb;
1799 QDIO_DBF_HEX2(0,setup,&ptr,sizeof(void*));
1800 ptr=(void*)q->sbal[0];
1801 QDIO_DBF_HEX2(0,setup,&ptr,sizeof(void*));
1802
1803 /* fill in slsb */
1804 if (!irq_ptr->is_qebsm) {
1805 unsigned int count = 1;
1806 for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; j++)
1807 set_slsb(q, &j, SLSB_P_INPUT_NOT_INIT, &count);
1808 }
1809 }
1810
1811 for (i=0;i<no_output_qs;i++) {
1812 q=irq_ptr->output_qs[i];
1813 memset(q,0,((char*)&q->slib)-((char*)q));
1814
1815 sprintf(dbf_text,"outq%4x",i);
1816 QDIO_DBF_TEXT0(0,setup,dbf_text);
1817 QDIO_DBF_HEX0(0,setup,&q,sizeof(void*));
1818
1819 memset(q->slib,0,PAGE_SIZE);
1820 q->sl=(struct sl*)(((char*)q->slib)+PAGE_SIZE/2);
1821
1822 available=0;
1823
1824 for (j=0;j<QDIO_MAX_BUFFERS_PER_Q;j++)
1825 q->sbal[j]=*(outbound_sbals_array++);
1826
1827 q->queue_type=q_format;
1828 q->int_parm=int_parm;
1829 q->is_input_q=0;
1830 q->schid = irq_ptr->schid;
1831 q->cdev = cdev;
1832 q->irq_ptr = irq_ptr;
1833 q->mask=1<<(31-i);
1834 q->q_no=i;
1835 q->first_to_check=0;
1836 q->last_move_ftc=0;
1837 q->handler=output_handler;
1838
1839 q->tasklet.data=(unsigned long)q;
1840 q->tasklet.func=(void(*)(unsigned long))
1841 &qdio_outbound_processing;
1842
1843 atomic_set(&q->busy_siga_counter,0);
1844 q->timing.busy_start=0;
1845
1846 /* fill in slib */
1847 if (i>0) irq_ptr->output_qs[i-1]->slib->nsliba=
1848 (unsigned long)(q->slib);
1849 q->slib->sla=(unsigned long)(q->sl);
1850 q->slib->slsba=(unsigned long)(&q->slsb.acc.val[0]);
1851
1852 /* fill in sl */
1853 for (j=0;j<QDIO_MAX_BUFFERS_PER_Q;j++)
1854 q->sl->element[j].sbal=(unsigned long)(q->sbal[j]);
1855
1856 QDIO_DBF_TEXT2(0,setup,"sl-sb-b0");
1857 ptr=(void*)q->sl;
1858 QDIO_DBF_HEX2(0,setup,&ptr,sizeof(void*));
1859 ptr=(void*)&q->slsb;
1860 QDIO_DBF_HEX2(0,setup,&ptr,sizeof(void*));
1861 ptr=(void*)q->sbal[0];
1862 QDIO_DBF_HEX2(0,setup,&ptr,sizeof(void*));
1863
1864 /* fill in slsb */
1865 if (!irq_ptr->is_qebsm) {
1866 unsigned int count = 1;
1867 for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; j++)
1868 set_slsb(q, &j, SLSB_P_OUTPUT_NOT_INIT, &count);
1869 }
1870 }
1871 }
1872
1873 static void
1874 qdio_fill_thresholds(struct qdio_irq *irq_ptr,
1875 unsigned int no_input_qs,
1876 unsigned int no_output_qs,
1877 unsigned int min_input_threshold,
1878 unsigned int max_input_threshold,
1879 unsigned int min_output_threshold,
1880 unsigned int max_output_threshold)
1881 {
1882 int i;
1883 struct qdio_q *q;
1884
1885 for (i=0;i<no_input_qs;i++) {
1886 q=irq_ptr->input_qs[i];
1887 q->timing.threshold=max_input_threshold;
1888 /* for (j=0;j<QDIO_STATS_CLASSES;j++) {
1889 q->threshold_classes[j].threshold=
1890 min_input_threshold+
1891 (max_input_threshold-min_input_threshold)/
1892 QDIO_STATS_CLASSES;
1893 }
1894 qdio_use_thresholds(q,QDIO_STATS_CLASSES/2);*/
1895 }
1896 for (i=0;i<no_output_qs;i++) {
1897 q=irq_ptr->output_qs[i];
1898 q->timing.threshold=max_output_threshold;
1899 /* for (j=0;j<QDIO_STATS_CLASSES;j++) {
1900 q->threshold_classes[j].threshold=
1901 min_output_threshold+
1902 (max_output_threshold-min_output_threshold)/
1903 QDIO_STATS_CLASSES;
1904 }
1905 qdio_use_thresholds(q,QDIO_STATS_CLASSES/2);*/
1906 }
1907 }
1908
1909 static int
1910 tiqdio_thinint_handler(void)
1911 {
1912 QDIO_DBF_TEXT4(0,trace,"thin_int");
1913
1914 if (qdio_performance_stats) {
1915 perf_stats.thinints++;
1916 perf_stats.start_time_inbound=NOW;
1917 }
1918
1919 /* SVS only when needed:
1920 * issue SVS to benefit from iqdio interrupt avoidance
1921 * (SVS clears AISOI)*/
1922 if (!omit_svs)
1923 tiqdio_clear_global_summary();
1924
1925 tiqdio_inbound_checks();
1926 return 0;
1927 }
1928
1929 static void
1930 qdio_set_state(struct qdio_irq *irq_ptr, enum qdio_irq_states state)
1931 {
1932 int i;
1933 #ifdef CONFIG_QDIO_DEBUG
1934 char dbf_text[15];
1935
1936 QDIO_DBF_TEXT5(0,trace,"newstate");
1937 sprintf(dbf_text,"%4x%4x",irq_ptr->schid.sch_no,state);
1938 QDIO_DBF_TEXT5(0,trace,dbf_text);
1939 #endif /* CONFIG_QDIO_DEBUG */
1940
1941 irq_ptr->state=state;
1942 for (i=0;i<irq_ptr->no_input_qs;i++)
1943 irq_ptr->input_qs[i]->state=state;
1944 for (i=0;i<irq_ptr->no_output_qs;i++)
1945 irq_ptr->output_qs[i]->state=state;
1946 mb();
1947 }
1948
1949 static inline void
1950 qdio_irq_check_sense(struct subchannel_id schid, struct irb *irb)
1951 {
1952 char dbf_text[15];
1953
1954 if (irb->esw.esw0.erw.cons) {
1955 sprintf(dbf_text,"sens%4x",schid.sch_no);
1956 QDIO_DBF_TEXT2(1,trace,dbf_text);
1957 QDIO_DBF_HEX0(0,sense,irb,QDIO_DBF_SENSE_LEN);
1958
1959 QDIO_PRINT_WARN("sense data available on qdio channel.\n");
1960 QDIO_HEXDUMP16(WARN,"irb: ",irb);
1961 QDIO_HEXDUMP16(WARN,"sense data: ",irb->ecw);
1962 }
1963
1964 }
1965
1966 static inline void
1967 qdio_handle_pci(struct qdio_irq *irq_ptr)
1968 {
1969 int i;
1970 struct qdio_q *q;
1971
1972 if (qdio_performance_stats) {
1973 perf_stats.pcis++;
1974 perf_stats.start_time_inbound=NOW;
1975 }
1976 for (i=0;i<irq_ptr->no_input_qs;i++) {
1977 q=irq_ptr->input_qs[i];
1978 if (q->is_input_q&QDIO_FLAG_NO_INPUT_INTERRUPT_CONTEXT)
1979 qdio_mark_q(q);
1980 else {
1981 if (qdio_performance_stats)
1982 perf_stats.tl_runs--;
1983 __qdio_inbound_processing(q);
1984 }
1985 }
1986 if (!irq_ptr->hydra_gives_outbound_pcis)
1987 return;
1988 for (i=0;i<irq_ptr->no_output_qs;i++) {
1989 q=irq_ptr->output_qs[i];
1990 if (qdio_is_outbound_q_done(q))
1991 continue;
1992 if (qdio_performance_stats)
1993 perf_stats.tl_runs--;
1994 if (!irq_ptr->sync_done_on_outb_pcis)
1995 SYNC_MEMORY;
1996 __qdio_outbound_processing(q);
1997 }
1998 }
1999
2000 static void qdio_establish_handle_irq(struct ccw_device*, int, int);
2001
2002 static inline void
2003 qdio_handle_activate_check(struct ccw_device *cdev, unsigned long intparm,
2004 int cstat, int dstat)
2005 {
2006 struct qdio_irq *irq_ptr;
2007 struct qdio_q *q;
2008 char dbf_text[15];
2009
2010 irq_ptr = cdev->private->qdio_data;
2011
2012 QDIO_DBF_TEXT2(1, trace, "ick2");
2013 sprintf(dbf_text,"%s", cdev->dev.bus_id);
2014 QDIO_DBF_TEXT2(1,trace,dbf_text);
2015 QDIO_DBF_HEX2(0,trace,&intparm,sizeof(int));
2016 QDIO_DBF_HEX2(0,trace,&dstat,sizeof(int));
2017 QDIO_DBF_HEX2(0,trace,&cstat,sizeof(int));
2018 QDIO_PRINT_ERR("received check condition on activate " \
2019 "queues on device %s (cs=x%x, ds=x%x).\n",
2020 cdev->dev.bus_id, cstat, dstat);
2021 if (irq_ptr->no_input_qs) {
2022 q=irq_ptr->input_qs[0];
2023 } else if (irq_ptr->no_output_qs) {
2024 q=irq_ptr->output_qs[0];
2025 } else {
2026 QDIO_PRINT_ERR("oops... no queue registered for device %s!?\n",
2027 cdev->dev.bus_id);
2028 goto omit_handler_call;
2029 }
2030 q->handler(q->cdev,QDIO_STATUS_ACTIVATE_CHECK_CONDITION|
2031 QDIO_STATUS_LOOK_FOR_ERROR,
2032 0,0,0,-1,-1,q->int_parm);
2033 omit_handler_call:
2034 qdio_set_state(irq_ptr,QDIO_IRQ_STATE_STOPPED);
2035
2036 }
2037
2038 static void
2039 qdio_call_shutdown(struct work_struct *work)
2040 {
2041 struct ccw_device_private *priv;
2042 struct ccw_device *cdev;
2043
2044 priv = container_of(work, struct ccw_device_private, kick_work);
2045 cdev = priv->cdev;
2046 qdio_shutdown(cdev, QDIO_FLAG_CLEANUP_USING_CLEAR);
2047 put_device(&cdev->dev);
2048 }
2049
2050 static void
2051 qdio_timeout_handler(struct ccw_device *cdev)
2052 {
2053 struct qdio_irq *irq_ptr;
2054 char dbf_text[15];
2055
2056 QDIO_DBF_TEXT2(0, trace, "qtoh");
2057 sprintf(dbf_text, "%s", cdev->dev.bus_id);
2058 QDIO_DBF_TEXT2(0, trace, dbf_text);
2059
2060 irq_ptr = cdev->private->qdio_data;
2061 sprintf(dbf_text, "state:%d", irq_ptr->state);
2062 QDIO_DBF_TEXT2(0, trace, dbf_text);
2063
2064 switch (irq_ptr->state) {
2065 case QDIO_IRQ_STATE_INACTIVE:
2066 QDIO_PRINT_ERR("establish queues on irq 0.%x.%04x: timed out\n",
2067 irq_ptr->schid.ssid, irq_ptr->schid.sch_no);
2068 QDIO_DBF_TEXT2(1,setup,"eq:timeo");
2069 qdio_set_state(irq_ptr, QDIO_IRQ_STATE_ERR);
2070 break;
2071 case QDIO_IRQ_STATE_CLEANUP:
2072 QDIO_PRINT_INFO("Did not get interrupt on cleanup, "
2073 "irq=0.%x.%x.\n",
2074 irq_ptr->schid.ssid, irq_ptr->schid.sch_no);
2075 qdio_set_state(irq_ptr, QDIO_IRQ_STATE_ERR);
2076 break;
2077 case QDIO_IRQ_STATE_ESTABLISHED:
2078 case QDIO_IRQ_STATE_ACTIVE:
2079 /* I/O has been terminated by common I/O layer. */
2080 QDIO_PRINT_INFO("Queues on irq 0.%x.%04x killed by cio.\n",
2081 irq_ptr->schid.ssid, irq_ptr->schid.sch_no);
2082 QDIO_DBF_TEXT2(1, trace, "cio:term");
2083 qdio_set_state(irq_ptr, QDIO_IRQ_STATE_STOPPED);
2084 if (get_device(&cdev->dev)) {
2085 /* Can't call shutdown from interrupt context. */
2086 PREPARE_WORK(&cdev->private->kick_work,
2087 qdio_call_shutdown);
2088 queue_work(ccw_device_work, &cdev->private->kick_work);
2089 }
2090 break;
2091 default:
2092 BUG();
2093 }
2094 ccw_device_set_timeout(cdev, 0);
2095 wake_up(&cdev->private->wait_q);
2096 }
2097
2098 static void
2099 qdio_handler(struct ccw_device *cdev, unsigned long intparm, struct irb *irb)
2100 {
2101 struct qdio_irq *irq_ptr;
2102 int cstat,dstat;
2103 char dbf_text[15];
2104
2105 #ifdef CONFIG_QDIO_DEBUG
2106 QDIO_DBF_TEXT4(0, trace, "qint");
2107 sprintf(dbf_text, "%s", cdev->dev.bus_id);
2108 QDIO_DBF_TEXT4(0, trace, dbf_text);
2109 #endif /* CONFIG_QDIO_DEBUG */
2110
2111 if (!intparm) {
2112 QDIO_PRINT_ERR("got unsolicited interrupt in qdio " \
2113 "handler, device %s\n", cdev->dev.bus_id);
2114 return;
2115 }
2116
2117 irq_ptr = cdev->private->qdio_data;
2118 if (!irq_ptr) {
2119 QDIO_DBF_TEXT2(1, trace, "uint");
2120 sprintf(dbf_text,"%s", cdev->dev.bus_id);
2121 QDIO_DBF_TEXT2(1,trace,dbf_text);
2122 QDIO_PRINT_ERR("received interrupt on unused device %s!\n",
2123 cdev->dev.bus_id);
2124 return;
2125 }
2126
2127 if (IS_ERR(irb)) {
2128 /* Currently running i/o is in error. */
2129 switch (PTR_ERR(irb)) {
2130 case -EIO:
2131 QDIO_PRINT_ERR("i/o error on device %s\n",
2132 cdev->dev.bus_id);
2133 return;
2134 case -ETIMEDOUT:
2135 qdio_timeout_handler(cdev);
2136 return;
2137 default:
2138 QDIO_PRINT_ERR("unknown error state %ld on device %s\n",
2139 PTR_ERR(irb), cdev->dev.bus_id);
2140 return;
2141 }
2142 }
2143
2144 qdio_irq_check_sense(irq_ptr->schid, irb);
2145
2146 #ifdef CONFIG_QDIO_DEBUG
2147 sprintf(dbf_text, "state:%d", irq_ptr->state);
2148 QDIO_DBF_TEXT4(0, trace, dbf_text);
2149 #endif /* CONFIG_QDIO_DEBUG */
2150
2151 cstat = irb->scsw.cstat;
2152 dstat = irb->scsw.dstat;
2153
2154 switch (irq_ptr->state) {
2155 case QDIO_IRQ_STATE_INACTIVE:
2156 qdio_establish_handle_irq(cdev, cstat, dstat);
2157 break;
2158
2159 case QDIO_IRQ_STATE_CLEANUP:
2160 qdio_set_state(irq_ptr, QDIO_IRQ_STATE_INACTIVE);
2161 break;
2162
2163 case QDIO_IRQ_STATE_ESTABLISHED:
2164 case QDIO_IRQ_STATE_ACTIVE:
2165 if (cstat & SCHN_STAT_PCI) {
2166 qdio_handle_pci(irq_ptr);
2167 break;
2168 }
2169
2170 if ((cstat&~SCHN_STAT_PCI)||dstat) {
2171 qdio_handle_activate_check(cdev, intparm, cstat, dstat);
2172 break;
2173 }
2174 default:
2175 QDIO_PRINT_ERR("got interrupt for queues in state %d on " \
2176 "device %s?!\n",
2177 irq_ptr->state, cdev->dev.bus_id);
2178 }
2179 wake_up(&cdev->private->wait_q);
2180
2181 }
2182
2183 int
2184 qdio_synchronize(struct ccw_device *cdev, unsigned int flags,
2185 unsigned int queue_number)
2186 {
2187 int cc = 0;
2188 struct qdio_q *q;
2189 struct qdio_irq *irq_ptr;
2190 void *ptr;
2191 #ifdef CONFIG_QDIO_DEBUG
2192 char dbf_text[15]="SyncXXXX";
2193 #endif
2194
2195 irq_ptr = cdev->private->qdio_data;
2196 if (!irq_ptr)
2197 return -ENODEV;
2198
2199 #ifdef CONFIG_QDIO_DEBUG
2200 *((int*)(&dbf_text[4])) = irq_ptr->schid.sch_no;
2201 QDIO_DBF_HEX4(0,trace,dbf_text,QDIO_DBF_TRACE_LEN);
2202 *((int*)(&dbf_text[0]))=flags;
2203 *((int*)(&dbf_text[4]))=queue_number;
2204 QDIO_DBF_HEX4(0,trace,dbf_text,QDIO_DBF_TRACE_LEN);
2205 #endif /* CONFIG_QDIO_DEBUG */
2206
2207 if (flags&QDIO_FLAG_SYNC_INPUT) {
2208 q=irq_ptr->input_qs[queue_number];
2209 if (!q)
2210 return -EINVAL;
2211 if (!(irq_ptr->is_qebsm))
2212 cc = do_siga_sync(q->schid, 0, q->mask);
2213 } else if (flags&QDIO_FLAG_SYNC_OUTPUT) {
2214 q=irq_ptr->output_qs[queue_number];
2215 if (!q)
2216 return -EINVAL;
2217 if (!(irq_ptr->is_qebsm))
2218 cc = do_siga_sync(q->schid, q->mask, 0);
2219 } else
2220 return -EINVAL;
2221
2222 ptr=&cc;
2223 if (cc)
2224 QDIO_DBF_HEX3(0,trace,&ptr,sizeof(int));
2225
2226 return cc;
2227 }
2228
2229 static inline void
2230 qdio_check_subchannel_qebsm(struct qdio_irq *irq_ptr, unsigned char qdioac,
2231 unsigned long token)
2232 {
2233 struct qdio_q *q;
2234 int i;
2235 unsigned int count, start_buf;
2236 char dbf_text[15];
2237
2238 /*check if QEBSM is disabled */
2239 if (!(irq_ptr->is_qebsm) || !(qdioac & 0x01)) {
2240 irq_ptr->is_qebsm = 0;
2241 irq_ptr->sch_token = 0;
2242 irq_ptr->qib.rflags &= ~QIB_RFLAGS_ENABLE_QEBSM;
2243 QDIO_DBF_TEXT0(0,setup,"noV=V");
2244 return;
2245 }
2246 irq_ptr->sch_token = token;
2247 /*input queue*/
2248 for (i = 0; i < irq_ptr->no_input_qs;i++) {
2249 q = irq_ptr->input_qs[i];
2250 count = QDIO_MAX_BUFFERS_PER_Q;
2251 start_buf = 0;
2252 set_slsb(q, &start_buf, SLSB_P_INPUT_NOT_INIT, &count);
2253 }
2254 sprintf(dbf_text,"V=V:%2x",irq_ptr->is_qebsm);
2255 QDIO_DBF_TEXT0(0,setup,dbf_text);
2256 sprintf(dbf_text,"%8lx",irq_ptr->sch_token);
2257 QDIO_DBF_TEXT0(0,setup,dbf_text);
2258 /*output queue*/
2259 for (i = 0; i < irq_ptr->no_output_qs; i++) {
2260 q = irq_ptr->output_qs[i];
2261 count = QDIO_MAX_BUFFERS_PER_Q;
2262 start_buf = 0;
2263 set_slsb(q, &start_buf, SLSB_P_OUTPUT_NOT_INIT, &count);
2264 }
2265 }
2266
2267 static void
2268 qdio_get_ssqd_information(struct qdio_irq *irq_ptr)
2269 {
2270 int result;
2271 unsigned char qdioac;
2272 struct {
2273 struct chsc_header request;
2274 u16 reserved1:10;
2275 u16 ssid:2;
2276 u16 fmt:4;
2277 u16 first_sch;
2278 u16 reserved2;
2279 u16 last_sch;
2280 u32 reserved3;
2281 struct chsc_header response;
2282 u32 reserved4;
2283 u8 flags;
2284 u8 reserved5;
2285 u16 sch;
2286 u8 qfmt;
2287 u8 parm;
2288 u8 qdioac1;
2289 u8 sch_class;
2290 u8 reserved7;
2291 u8 icnt;
2292 u8 reserved8;
2293 u8 ocnt;
2294 u8 reserved9;
2295 u8 mbccnt;
2296 u16 qdioac2;
2297 u64 sch_token;
2298 } *ssqd_area;
2299
2300 QDIO_DBF_TEXT0(0,setup,"getssqd");
2301 qdioac = 0;
2302 ssqd_area = mempool_alloc(qdio_mempool_scssc, GFP_ATOMIC);
2303 if (!ssqd_area) {
2304 QDIO_PRINT_WARN("Could not get memory for chsc. Using all " \
2305 "SIGAs for sch x%x.\n", irq_ptr->schid.sch_no);
2306 irq_ptr->qdioac = CHSC_FLAG_SIGA_INPUT_NECESSARY ||
2307 CHSC_FLAG_SIGA_OUTPUT_NECESSARY ||
2308 CHSC_FLAG_SIGA_SYNC_NECESSARY; /* all flags set */
2309 irq_ptr->is_qebsm = 0;
2310 irq_ptr->sch_token = 0;
2311 irq_ptr->qib.rflags &= ~QIB_RFLAGS_ENABLE_QEBSM;
2312 return;
2313 }
2314
2315 ssqd_area->request = (struct chsc_header) {
2316 .length = 0x0010,
2317 .code = 0x0024,
2318 };
2319 ssqd_area->first_sch = irq_ptr->schid.sch_no;
2320 ssqd_area->last_sch = irq_ptr->schid.sch_no;
2321 ssqd_area->ssid = irq_ptr->schid.ssid;
2322 result = chsc(ssqd_area);
2323
2324 if (result) {
2325 QDIO_PRINT_WARN("CHSC returned cc %i. Using all " \
2326 "SIGAs for sch 0.%x.%x.\n", result,
2327 irq_ptr->schid.ssid, irq_ptr->schid.sch_no);
2328 qdioac = CHSC_FLAG_SIGA_INPUT_NECESSARY ||
2329 CHSC_FLAG_SIGA_OUTPUT_NECESSARY ||
2330 CHSC_FLAG_SIGA_SYNC_NECESSARY; /* all flags set */
2331 irq_ptr->is_qebsm = 0;
2332 goto out;
2333 }
2334
2335 if (ssqd_area->response.code != QDIO_CHSC_RESPONSE_CODE_OK) {
2336 QDIO_PRINT_WARN("response upon checking SIGA needs " \
2337 "is 0x%x. Using all SIGAs for sch 0.%x.%x.\n",
2338 ssqd_area->response.code,
2339 irq_ptr->schid.ssid, irq_ptr->schid.sch_no);
2340 qdioac = CHSC_FLAG_SIGA_INPUT_NECESSARY ||
2341 CHSC_FLAG_SIGA_OUTPUT_NECESSARY ||
2342 CHSC_FLAG_SIGA_SYNC_NECESSARY; /* all flags set */
2343 irq_ptr->is_qebsm = 0;
2344 goto out;
2345 }
2346 if (!(ssqd_area->flags & CHSC_FLAG_QDIO_CAPABILITY) ||
2347 !(ssqd_area->flags & CHSC_FLAG_VALIDITY) ||
2348 (ssqd_area->sch != irq_ptr->schid.sch_no)) {
2349 QDIO_PRINT_WARN("huh? problems checking out sch 0.%x.%x... " \
2350 "using all SIGAs.\n",
2351 irq_ptr->schid.ssid, irq_ptr->schid.sch_no);
2352 qdioac = CHSC_FLAG_SIGA_INPUT_NECESSARY |
2353 CHSC_FLAG_SIGA_OUTPUT_NECESSARY |
2354 CHSC_FLAG_SIGA_SYNC_NECESSARY; /* worst case */
2355 irq_ptr->is_qebsm = 0;
2356 goto out;
2357 }
2358 qdioac = ssqd_area->qdioac1;
2359 out:
2360 qdio_check_subchannel_qebsm(irq_ptr, qdioac,
2361 ssqd_area->sch_token);
2362 mempool_free(ssqd_area, qdio_mempool_scssc);
2363 irq_ptr->qdioac = qdioac;
2364 }
2365
2366 static unsigned int
2367 tiqdio_check_chsc_availability(void)
2368 {
2369 char dbf_text[15];
2370
2371 if (!css_characteristics_avail)
2372 return -EIO;
2373
2374 /* Check for bit 41. */
2375 if (!css_general_characteristics.aif) {
2376 QDIO_PRINT_WARN("Adapter interruption facility not " \
2377 "installed.\n");
2378 return -ENOENT;
2379 }
2380
2381 /* Check for bits 107 and 108. */
2382 if (!css_chsc_characteristics.scssc ||
2383 !css_chsc_characteristics.scsscf) {
2384 QDIO_PRINT_WARN("Set Chan Subsys. Char. & Fast-CHSCs " \
2385 "not available.\n");
2386 return -ENOENT;
2387 }
2388
2389 /* Check for OSA/FCP thin interrupts (bit 67). */
2390 hydra_thinints = css_general_characteristics.aif_osa;
2391 sprintf(dbf_text,"hydrati%1x", hydra_thinints);
2392 QDIO_DBF_TEXT0(0,setup,dbf_text);
2393
2394 #ifdef CONFIG_64BIT
2395 /* Check for QEBSM support in general (bit 58). */
2396 is_passthrough = css_general_characteristics.qebsm;
2397 #endif
2398 sprintf(dbf_text,"cssQBS:%1x", is_passthrough);
2399 QDIO_DBF_TEXT0(0,setup,dbf_text);
2400
2401 /* Check for aif time delay disablement fac (bit 56). If installed,
2402 * omit svs even under lpar (good point by rick again) */
2403 omit_svs = css_general_characteristics.aif_tdd;
2404 sprintf(dbf_text,"omitsvs%1x", omit_svs);
2405 QDIO_DBF_TEXT0(0,setup,dbf_text);
2406 return 0;
2407 }
2408
2409
2410 static unsigned int
2411 tiqdio_set_subchannel_ind(struct qdio_irq *irq_ptr, int reset_to_zero)
2412 {
2413 unsigned long real_addr_local_summary_bit;
2414 unsigned long real_addr_dev_st_chg_ind;
2415 void *ptr;
2416 char dbf_text[15];
2417
2418 unsigned int resp_code;
2419 int result;
2420
2421 struct {
2422 struct chsc_header request;
2423 u16 operation_code;
2424 u16 reserved1;
2425 u32 reserved2;
2426 u32 reserved3;
2427 u64 summary_indicator_addr;
2428 u64 subchannel_indicator_addr;
2429 u32 ks:4;
2430 u32 kc:4;
2431 u32 reserved4:21;
2432 u32 isc:3;
2433 u32 word_with_d_bit;
2434 /* set to 0x10000000 to enable
2435 * time delay disablement facility */
2436 u32 reserved5;
2437 struct subchannel_id schid;
2438 u32 reserved6[1004];
2439 struct chsc_header response;
2440 u32 reserved7;
2441 } *scssc_area;
2442
2443 if (!irq_ptr->is_thinint_irq)
2444 return -ENODEV;
2445
2446 if (reset_to_zero) {
2447 real_addr_local_summary_bit=0;
2448 real_addr_dev_st_chg_ind=0;
2449 } else {
2450 real_addr_local_summary_bit=
2451 virt_to_phys((volatile void *)indicators);
2452 real_addr_dev_st_chg_ind=
2453 virt_to_phys((volatile void *)irq_ptr->dev_st_chg_ind);
2454 }
2455
2456 scssc_area = mempool_alloc(qdio_mempool_scssc, GFP_ATOMIC);
2457 if (!scssc_area) {
2458 QDIO_PRINT_WARN("No memory for setting indicators on " \
2459 "subchannel 0.%x.%x.\n",
2460 irq_ptr->schid.ssid, irq_ptr->schid.sch_no);
2461 return -ENOMEM;
2462 }
2463 scssc_area->request = (struct chsc_header) {
2464 .length = 0x0fe0,
2465 .code = 0x0021,
2466 };
2467 scssc_area->operation_code = 0;
2468
2469 scssc_area->summary_indicator_addr = real_addr_local_summary_bit;
2470 scssc_area->subchannel_indicator_addr = real_addr_dev_st_chg_ind;
2471 scssc_area->ks = QDIO_STORAGE_KEY;
2472 scssc_area->kc = QDIO_STORAGE_KEY;
2473 scssc_area->isc = TIQDIO_THININT_ISC;
2474 scssc_area->schid = irq_ptr->schid;
2475 /* enables the time delay disablement facility. Don't care
2476 * whether it is really there (i.e. we haven't checked for
2477 * it) */
2478 if (css_general_characteristics.aif_tdd)
2479 scssc_area->word_with_d_bit = 0x10000000;
2480 else
2481 QDIO_PRINT_WARN("Time delay disablement facility " \
2482 "not available\n");
2483
2484 result = chsc(scssc_area);
2485 if (result) {
2486 QDIO_PRINT_WARN("could not set indicators on irq 0.%x.%x, " \
2487 "cc=%i.\n",
2488 irq_ptr->schid.ssid, irq_ptr->schid.sch_no,result);
2489 result = -EIO;
2490 goto out;
2491 }
2492
2493 resp_code = scssc_area->response.code;
2494 if (resp_code!=QDIO_CHSC_RESPONSE_CODE_OK) {
2495 QDIO_PRINT_WARN("response upon setting indicators " \
2496 "is 0x%x.\n",resp_code);
2497 sprintf(dbf_text,"sidR%4x",resp_code);
2498 QDIO_DBF_TEXT1(0,trace,dbf_text);
2499 QDIO_DBF_TEXT1(0,setup,dbf_text);
2500 ptr=&scssc_area->response;
2501 QDIO_DBF_HEX2(1,setup,&ptr,QDIO_DBF_SETUP_LEN);
2502 result = -EIO;
2503 goto out;
2504 }
2505
2506 QDIO_DBF_TEXT2(0,setup,"setscind");
2507 QDIO_DBF_HEX2(0,setup,&real_addr_local_summary_bit,
2508 sizeof(unsigned long));
2509 QDIO_DBF_HEX2(0,setup,&real_addr_dev_st_chg_ind,sizeof(unsigned long));
2510 result = 0;
2511 out:
2512 mempool_free(scssc_area, qdio_mempool_scssc);
2513 return result;
2514
2515 }
2516
2517 static unsigned int
2518 tiqdio_set_delay_target(struct qdio_irq *irq_ptr, unsigned long delay_target)
2519 {
2520 unsigned int resp_code;
2521 int result;
2522 void *ptr;
2523 char dbf_text[15];
2524
2525 struct {
2526 struct chsc_header request;
2527 u16 operation_code;
2528 u16 reserved1;
2529 u32 reserved2;
2530 u32 reserved3;
2531 u32 reserved4[2];
2532 u32 delay_target;
2533 u32 reserved5[1009];
2534 struct chsc_header response;
2535 u32 reserved6;
2536 } *scsscf_area;
2537
2538 if (!irq_ptr->is_thinint_irq)
2539 return -ENODEV;
2540
2541 scsscf_area = mempool_alloc(qdio_mempool_scssc, GFP_ATOMIC);
2542 if (!scsscf_area) {
2543 QDIO_PRINT_WARN("No memory for setting delay target on " \
2544 "subchannel 0.%x.%x.\n",
2545 irq_ptr->schid.ssid, irq_ptr->schid.sch_no);
2546 return -ENOMEM;
2547 }
2548 scsscf_area->request = (struct chsc_header) {
2549 .length = 0x0fe0,
2550 .code = 0x1027,
2551 };
2552
2553 scsscf_area->delay_target = delay_target<<16;
2554
2555 result=chsc(scsscf_area);
2556 if (result) {
2557 QDIO_PRINT_WARN("could not set delay target on irq 0.%x.%x, " \
2558 "cc=%i. Continuing.\n",
2559 irq_ptr->schid.ssid, irq_ptr->schid.sch_no,
2560 result);
2561 result = -EIO;
2562 goto out;
2563 }
2564
2565 resp_code = scsscf_area->response.code;
2566 if (resp_code!=QDIO_CHSC_RESPONSE_CODE_OK) {
2567 QDIO_PRINT_WARN("response upon setting delay target " \
2568 "is 0x%x. Continuing.\n",resp_code);
2569 sprintf(dbf_text,"sdtR%4x",resp_code);
2570 QDIO_DBF_TEXT1(0,trace,dbf_text);
2571 QDIO_DBF_TEXT1(0,setup,dbf_text);
2572 ptr=&scsscf_area->response;
2573 QDIO_DBF_HEX2(1,trace,&ptr,QDIO_DBF_TRACE_LEN);
2574 }
2575 QDIO_DBF_TEXT2(0,trace,"delytrgt");
2576 QDIO_DBF_HEX2(0,trace,&delay_target,sizeof(unsigned long));
2577 result = 0; /* not critical */
2578 out:
2579 mempool_free(scsscf_area, qdio_mempool_scssc);
2580 return result;
2581 }
2582
2583 int
2584 qdio_cleanup(struct ccw_device *cdev, int how)
2585 {
2586 struct qdio_irq *irq_ptr;
2587 char dbf_text[15];
2588 int rc;
2589
2590 irq_ptr = cdev->private->qdio_data;
2591 if (!irq_ptr)
2592 return -ENODEV;
2593
2594 sprintf(dbf_text,"qcln%4x",irq_ptr->schid.sch_no);
2595 QDIO_DBF_TEXT1(0,trace,dbf_text);
2596 QDIO_DBF_TEXT0(0,setup,dbf_text);
2597
2598 rc = qdio_shutdown(cdev, how);
2599 if ((rc == 0) || (rc == -EINPROGRESS))
2600 rc = qdio_free(cdev);
2601 return rc;
2602 }
2603
2604 int
2605 qdio_shutdown(struct ccw_device *cdev, int how)
2606 {
2607 struct qdio_irq *irq_ptr;
2608 int i;
2609 int result = 0;
2610 int rc;
2611 unsigned long flags;
2612 int timeout;
2613 char dbf_text[15];
2614
2615 irq_ptr = cdev->private->qdio_data;
2616 if (!irq_ptr)
2617 return -ENODEV;
2618
2619 down(&irq_ptr->setting_up_sema);
2620
2621 sprintf(dbf_text,"qsqs%4x",irq_ptr->schid.sch_no);
2622 QDIO_DBF_TEXT1(0,trace,dbf_text);
2623 QDIO_DBF_TEXT0(0,setup,dbf_text);
2624
2625 /* mark all qs as uninteresting */
2626 for (i=0;i<irq_ptr->no_input_qs;i++)
2627 atomic_set(&irq_ptr->input_qs[i]->is_in_shutdown,1);
2628
2629 for (i=0;i<irq_ptr->no_output_qs;i++)
2630 atomic_set(&irq_ptr->output_qs[i]->is_in_shutdown,1);
2631
2632 tasklet_kill(&tiqdio_tasklet);
2633
2634 for (i=0;i<irq_ptr->no_input_qs;i++) {
2635 qdio_unmark_q(irq_ptr->input_qs[i]);
2636 tasklet_kill(&irq_ptr->input_qs[i]->tasklet);
2637 wait_event_interruptible_timeout(cdev->private->wait_q,
2638 !atomic_read(&irq_ptr->
2639 input_qs[i]->
2640 use_count),
2641 QDIO_NO_USE_COUNT_TIMEOUT);
2642 if (atomic_read(&irq_ptr->input_qs[i]->use_count))
2643 result=-EINPROGRESS;
2644 }
2645
2646 for (i=0;i<irq_ptr->no_output_qs;i++) {
2647 tasklet_kill(&irq_ptr->output_qs[i]->tasklet);
2648 wait_event_interruptible_timeout(cdev->private->wait_q,
2649 !atomic_read(&irq_ptr->
2650 output_qs[i]->
2651 use_count),
2652 QDIO_NO_USE_COUNT_TIMEOUT);
2653 if (atomic_read(&irq_ptr->output_qs[i]->use_count))
2654 result=-EINPROGRESS;
2655 }
2656
2657 /* cleanup subchannel */
2658 spin_lock_irqsave(get_ccwdev_lock(cdev),flags);
2659 if (how&QDIO_FLAG_CLEANUP_USING_CLEAR) {
2660 rc = ccw_device_clear(cdev, QDIO_DOING_CLEANUP);
2661 timeout=QDIO_CLEANUP_CLEAR_TIMEOUT;
2662 } else if (how&QDIO_FLAG_CLEANUP_USING_HALT) {
2663 rc = ccw_device_halt(cdev, QDIO_DOING_CLEANUP);
2664 timeout=QDIO_CLEANUP_HALT_TIMEOUT;
2665 } else { /* default behaviour */
2666 rc = ccw_device_halt(cdev, QDIO_DOING_CLEANUP);
2667 timeout=QDIO_CLEANUP_HALT_TIMEOUT;
2668 }
2669 if (rc == -ENODEV) {
2670 /* No need to wait for device no longer present. */
2671 qdio_set_state(irq_ptr, QDIO_IRQ_STATE_INACTIVE);
2672 spin_unlock_irqrestore(get_ccwdev_lock(cdev), flags);
2673 } else if (((void *)cdev->handler != (void *)qdio_handler) && rc == 0) {
2674 /*
2675 * Whoever put another handler there, has to cope with the
2676 * interrupt theirself. Might happen if qdio_shutdown was
2677 * called on already shutdown queues, but this shouldn't have
2678 * bad side effects.
2679 */
2680 qdio_set_state(irq_ptr, QDIO_IRQ_STATE_INACTIVE);
2681 spin_unlock_irqrestore(get_ccwdev_lock(cdev), flags);
2682 } else if (rc == 0) {
2683 qdio_set_state(irq_ptr, QDIO_IRQ_STATE_CLEANUP);
2684 ccw_device_set_timeout(cdev, timeout);
2685 spin_unlock_irqrestore(get_ccwdev_lock(cdev),flags);
2686
2687 wait_event(cdev->private->wait_q,
2688 irq_ptr->state == QDIO_IRQ_STATE_INACTIVE ||
2689 irq_ptr->state == QDIO_IRQ_STATE_ERR);
2690 } else {
2691 QDIO_PRINT_INFO("ccw_device_{halt,clear} returned %d for "
2692 "device %s\n", result, cdev->dev.bus_id);
2693 spin_unlock_irqrestore(get_ccwdev_lock(cdev), flags);
2694 result = rc;
2695 goto out;
2696 }
2697 if (irq_ptr->is_thinint_irq) {
2698 qdio_put_indicator((__u32*)irq_ptr->dev_st_chg_ind);
2699 tiqdio_set_subchannel_ind(irq_ptr,1);
2700 /* reset adapter interrupt indicators */
2701 }
2702
2703 /* exchange int handlers, if necessary */
2704 if ((void*)cdev->handler == (void*)qdio_handler)
2705 cdev->handler=irq_ptr->original_int_handler;
2706
2707 /* Ignore errors. */
2708 qdio_set_state(irq_ptr, QDIO_IRQ_STATE_INACTIVE);
2709 ccw_device_set_timeout(cdev, 0);
2710 out:
2711 up(&irq_ptr->setting_up_sema);
2712 return result;
2713 }
2714
2715 int
2716 qdio_free(struct ccw_device *cdev)
2717 {
2718 struct qdio_irq *irq_ptr;
2719 char dbf_text[15];
2720
2721 irq_ptr = cdev->private->qdio_data;
2722 if (!irq_ptr)
2723 return -ENODEV;
2724
2725 down(&irq_ptr->setting_up_sema);
2726
2727 sprintf(dbf_text,"qfqs%4x",irq_ptr->schid.sch_no);
2728 QDIO_DBF_TEXT1(0,trace,dbf_text);
2729 QDIO_DBF_TEXT0(0,setup,dbf_text);
2730
2731 cdev->private->qdio_data = NULL;
2732
2733 up(&irq_ptr->setting_up_sema);
2734
2735 qdio_release_irq_memory(irq_ptr);
2736 module_put(THIS_MODULE);
2737 return 0;
2738 }
2739
2740 static inline void
2741 qdio_allocate_do_dbf(struct qdio_initialize *init_data)
2742 {
2743 char dbf_text[20]; /* if a printf printed out more than 8 chars */
2744
2745 sprintf(dbf_text,"qfmt:%x",init_data->q_format);
2746 QDIO_DBF_TEXT0(0,setup,dbf_text);
2747 QDIO_DBF_HEX0(0,setup,init_data->adapter_name,8);
2748 sprintf(dbf_text,"qpff%4x",init_data->qib_param_field_format);
2749 QDIO_DBF_TEXT0(0,setup,dbf_text);
2750 QDIO_DBF_HEX0(0,setup,&init_data->qib_param_field,sizeof(char*));
2751 QDIO_DBF_HEX0(0,setup,&init_data->input_slib_elements,sizeof(long*));
2752 QDIO_DBF_HEX0(0,setup,&init_data->output_slib_elements,sizeof(long*));
2753 sprintf(dbf_text,"miit%4x",init_data->min_input_threshold);
2754 QDIO_DBF_TEXT0(0,setup,dbf_text);
2755 sprintf(dbf_text,"mait%4x",init_data->max_input_threshold);
2756 QDIO_DBF_TEXT0(0,setup,dbf_text);
2757 sprintf(dbf_text,"miot%4x",init_data->min_output_threshold);
2758 QDIO_DBF_TEXT0(0,setup,dbf_text);
2759 sprintf(dbf_text,"maot%4x",init_data->max_output_threshold);
2760 QDIO_DBF_TEXT0(0,setup,dbf_text);
2761 sprintf(dbf_text,"niq:%4x",init_data->no_input_qs);
2762 QDIO_DBF_TEXT0(0,setup,dbf_text);
2763 sprintf(dbf_text,"noq:%4x",init_data->no_output_qs);
2764 QDIO_DBF_TEXT0(0,setup,dbf_text);
2765 QDIO_DBF_HEX0(0,setup,&init_data->input_handler,sizeof(void*));
2766 QDIO_DBF_HEX0(0,setup,&init_data->output_handler,sizeof(void*));
2767 QDIO_DBF_HEX0(0,setup,&init_data->int_parm,sizeof(long));
2768 QDIO_DBF_HEX0(0,setup,&init_data->flags,sizeof(long));
2769 QDIO_DBF_HEX0(0,setup,&init_data->input_sbal_addr_array,sizeof(void*));
2770 QDIO_DBF_HEX0(0,setup,&init_data->output_sbal_addr_array,sizeof(void*));
2771 }
2772
2773 static inline void
2774 qdio_allocate_fill_input_desc(struct qdio_irq *irq_ptr, int i, int iqfmt)
2775 {
2776 irq_ptr->input_qs[i]->is_iqdio_q = iqfmt;
2777 irq_ptr->input_qs[i]->is_thinint_q = irq_ptr->is_thinint_irq;
2778
2779 irq_ptr->qdr->qdf0[i].sliba=(unsigned long)(irq_ptr->input_qs[i]->slib);
2780
2781 irq_ptr->qdr->qdf0[i].sla=(unsigned long)(irq_ptr->input_qs[i]->sl);
2782
2783 irq_ptr->qdr->qdf0[i].slsba=
2784 (unsigned long)(&irq_ptr->input_qs[i]->slsb.acc.val[0]);
2785
2786 irq_ptr->qdr->qdf0[i].akey=QDIO_STORAGE_KEY;
2787 irq_ptr->qdr->qdf0[i].bkey=QDIO_STORAGE_KEY;
2788 irq_ptr->qdr->qdf0[i].ckey=QDIO_STORAGE_KEY;
2789 irq_ptr->qdr->qdf0[i].dkey=QDIO_STORAGE_KEY;
2790 }
2791
2792 static inline void
2793 qdio_allocate_fill_output_desc(struct qdio_irq *irq_ptr, int i,
2794 int j, int iqfmt)
2795 {
2796 irq_ptr->output_qs[i]->is_iqdio_q = iqfmt;
2797 irq_ptr->output_qs[i]->is_thinint_q = irq_ptr->is_thinint_irq;
2798
2799 irq_ptr->qdr->qdf0[i+j].sliba=(unsigned long)(irq_ptr->output_qs[i]->slib);
2800
2801 irq_ptr->qdr->qdf0[i+j].sla=(unsigned long)(irq_ptr->output_qs[i]->sl);
2802
2803 irq_ptr->qdr->qdf0[i+j].slsba=
2804 (unsigned long)(&irq_ptr->output_qs[i]->slsb.acc.val[0]);
2805
2806 irq_ptr->qdr->qdf0[i+j].akey=QDIO_STORAGE_KEY;
2807 irq_ptr->qdr->qdf0[i+j].bkey=QDIO_STORAGE_KEY;
2808 irq_ptr->qdr->qdf0[i+j].ckey=QDIO_STORAGE_KEY;
2809 irq_ptr->qdr->qdf0[i+j].dkey=QDIO_STORAGE_KEY;
2810 }
2811
2812
2813 static inline void
2814 qdio_initialize_set_siga_flags_input(struct qdio_irq *irq_ptr)
2815 {
2816 int i;
2817
2818 for (i=0;i<irq_ptr->no_input_qs;i++) {
2819 irq_ptr->input_qs[i]->siga_sync=
2820 irq_ptr->qdioac&CHSC_FLAG_SIGA_SYNC_NECESSARY;
2821 irq_ptr->input_qs[i]->siga_in=
2822 irq_ptr->qdioac&CHSC_FLAG_SIGA_INPUT_NECESSARY;
2823 irq_ptr->input_qs[i]->siga_out=
2824 irq_ptr->qdioac&CHSC_FLAG_SIGA_OUTPUT_NECESSARY;
2825 irq_ptr->input_qs[i]->siga_sync_done_on_thinints=
2826 irq_ptr->qdioac&CHSC_FLAG_SIGA_SYNC_DONE_ON_THININTS;
2827 irq_ptr->input_qs[i]->hydra_gives_outbound_pcis=
2828 irq_ptr->hydra_gives_outbound_pcis;
2829 irq_ptr->input_qs[i]->siga_sync_done_on_outb_tis=
2830 ((irq_ptr->qdioac&
2831 (CHSC_FLAG_SIGA_SYNC_DONE_ON_OUTB_PCIS|
2832 CHSC_FLAG_SIGA_SYNC_DONE_ON_THININTS))==
2833 (CHSC_FLAG_SIGA_SYNC_DONE_ON_OUTB_PCIS|
2834 CHSC_FLAG_SIGA_SYNC_DONE_ON_THININTS));
2835
2836 }
2837 }
2838
2839 static inline void
2840 qdio_initialize_set_siga_flags_output(struct qdio_irq *irq_ptr)
2841 {
2842 int i;
2843
2844 for (i=0;i<irq_ptr->no_output_qs;i++) {
2845 irq_ptr->output_qs[i]->siga_sync=
2846 irq_ptr->qdioac&CHSC_FLAG_SIGA_SYNC_NECESSARY;
2847 irq_ptr->output_qs[i]->siga_in=
2848 irq_ptr->qdioac&CHSC_FLAG_SIGA_INPUT_NECESSARY;
2849 irq_ptr->output_qs[i]->siga_out=
2850 irq_ptr->qdioac&CHSC_FLAG_SIGA_OUTPUT_NECESSARY;
2851 irq_ptr->output_qs[i]->siga_sync_done_on_thinints=
2852 irq_ptr->qdioac&CHSC_FLAG_SIGA_SYNC_DONE_ON_THININTS;
2853 irq_ptr->output_qs[i]->hydra_gives_outbound_pcis=
2854 irq_ptr->hydra_gives_outbound_pcis;
2855 irq_ptr->output_qs[i]->siga_sync_done_on_outb_tis=
2856 ((irq_ptr->qdioac&
2857 (CHSC_FLAG_SIGA_SYNC_DONE_ON_OUTB_PCIS|
2858 CHSC_FLAG_SIGA_SYNC_DONE_ON_THININTS))==
2859 (CHSC_FLAG_SIGA_SYNC_DONE_ON_OUTB_PCIS|
2860 CHSC_FLAG_SIGA_SYNC_DONE_ON_THININTS));
2861
2862 }
2863 }
2864
2865 static inline int
2866 qdio_establish_irq_check_for_errors(struct ccw_device *cdev, int cstat,
2867 int dstat)
2868 {
2869 char dbf_text[15];
2870 struct qdio_irq *irq_ptr;
2871
2872 irq_ptr = cdev->private->qdio_data;
2873
2874 if (cstat || (dstat & ~(DEV_STAT_CHN_END|DEV_STAT_DEV_END))) {
2875 sprintf(dbf_text,"ick1%4x",irq_ptr->schid.sch_no);
2876 QDIO_DBF_TEXT2(1,trace,dbf_text);
2877 QDIO_DBF_HEX2(0,trace,&dstat,sizeof(int));
2878 QDIO_DBF_HEX2(0,trace,&cstat,sizeof(int));
2879 QDIO_PRINT_ERR("received check condition on establish " \
2880 "queues on irq 0.%x.%x (cs=x%x, ds=x%x).\n",
2881 irq_ptr->schid.ssid, irq_ptr->schid.sch_no,
2882 cstat,dstat);
2883 qdio_set_state(irq_ptr,QDIO_IRQ_STATE_ERR);
2884 }
2885
2886 if (!(dstat & DEV_STAT_DEV_END)) {
2887 QDIO_DBF_TEXT2(1,setup,"eq:no de");
2888 QDIO_DBF_HEX2(0,setup,&dstat, sizeof(dstat));
2889 QDIO_DBF_HEX2(0,setup,&cstat, sizeof(cstat));
2890 QDIO_PRINT_ERR("establish queues on irq 0.%x.%04x: didn't get "
2891 "device end: dstat=%02x, cstat=%02x\n",
2892 irq_ptr->schid.ssid, irq_ptr->schid.sch_no,
2893 dstat, cstat);
2894 qdio_set_state(irq_ptr, QDIO_IRQ_STATE_ERR);
2895 return 1;
2896 }
2897
2898 if (dstat & ~(DEV_STAT_CHN_END|DEV_STAT_DEV_END)) {
2899 QDIO_DBF_TEXT2(1,setup,"eq:badio");
2900 QDIO_DBF_HEX2(0,setup,&dstat, sizeof(dstat));
2901 QDIO_DBF_HEX2(0,setup,&cstat, sizeof(cstat));
2902 QDIO_PRINT_ERR("establish queues on irq 0.%x.%04x: got "
2903 "the following devstat: dstat=%02x, "
2904 "cstat=%02x\n", irq_ptr->schid.ssid,
2905 irq_ptr->schid.sch_no, dstat, cstat);
2906 qdio_set_state(irq_ptr, QDIO_IRQ_STATE_ERR);
2907 return 1;
2908 }
2909 return 0;
2910 }
2911
2912 static void
2913 qdio_establish_handle_irq(struct ccw_device *cdev, int cstat, int dstat)
2914 {
2915 struct qdio_irq *irq_ptr;
2916 char dbf_text[15];
2917
2918 irq_ptr = cdev->private->qdio_data;
2919
2920 sprintf(dbf_text,"qehi%4x",cdev->private->schid.sch_no);
2921 QDIO_DBF_TEXT0(0,setup,dbf_text);
2922 QDIO_DBF_TEXT0(0,trace,dbf_text);
2923
2924 if (qdio_establish_irq_check_for_errors(cdev, cstat, dstat)) {
2925 ccw_device_set_timeout(cdev, 0);
2926 return;
2927 }
2928
2929 qdio_set_state(irq_ptr,QDIO_IRQ_STATE_ESTABLISHED);
2930 ccw_device_set_timeout(cdev, 0);
2931 }
2932
2933 int
2934 qdio_initialize(struct qdio_initialize *init_data)
2935 {
2936 int rc;
2937 char dbf_text[15];
2938
2939 sprintf(dbf_text,"qini%4x",init_data->cdev->private->schid.sch_no);
2940 QDIO_DBF_TEXT0(0,setup,dbf_text);
2941 QDIO_DBF_TEXT0(0,trace,dbf_text);
2942
2943 rc = qdio_allocate(init_data);
2944 if (rc == 0) {
2945 rc = qdio_establish(init_data);
2946 if (rc != 0)
2947 qdio_free(init_data->cdev);
2948 }
2949
2950 return rc;
2951 }
2952
2953
2954 int
2955 qdio_allocate(struct qdio_initialize *init_data)
2956 {
2957 struct qdio_irq *irq_ptr;
2958 char dbf_text[15];
2959
2960 sprintf(dbf_text,"qalc%4x",init_data->cdev->private->schid.sch_no);
2961 QDIO_DBF_TEXT0(0,setup,dbf_text);
2962 QDIO_DBF_TEXT0(0,trace,dbf_text);
2963 if ( (init_data->no_input_qs>QDIO_MAX_QUEUES_PER_IRQ) ||
2964 (init_data->no_output_qs>QDIO_MAX_QUEUES_PER_IRQ) ||
2965 ((init_data->no_input_qs) && (!init_data->input_handler)) ||
2966 ((init_data->no_output_qs) && (!init_data->output_handler)) )
2967 return -EINVAL;
2968
2969 if (!init_data->input_sbal_addr_array)
2970 return -EINVAL;
2971
2972 if (!init_data->output_sbal_addr_array)
2973 return -EINVAL;
2974
2975 qdio_allocate_do_dbf(init_data);
2976
2977 /* create irq */
2978 irq_ptr = (void *) get_zeroed_page(GFP_KERNEL | GFP_DMA);
2979
2980 QDIO_DBF_TEXT0(0,setup,"irq_ptr:");
2981 QDIO_DBF_HEX0(0,setup,&irq_ptr,sizeof(void*));
2982
2983 if (!irq_ptr) {
2984 QDIO_PRINT_ERR("kmalloc of irq_ptr failed!\n");
2985 return -ENOMEM;
2986 }
2987
2988 init_MUTEX(&irq_ptr->setting_up_sema);
2989
2990 /* QDR must be in DMA area since CCW data address is only 32 bit */
2991 irq_ptr->qdr=kmalloc(sizeof(struct qdr), GFP_KERNEL | GFP_DMA);
2992 if (!(irq_ptr->qdr)) {
2993 free_page((unsigned long) irq_ptr);
2994 QDIO_PRINT_ERR("kmalloc of irq_ptr->qdr failed!\n");
2995 return -ENOMEM;
2996 }
2997 QDIO_DBF_TEXT0(0,setup,"qdr:");
2998 QDIO_DBF_HEX0(0,setup,&irq_ptr->qdr,sizeof(void*));
2999
3000 if (qdio_alloc_qs(irq_ptr,
3001 init_data->no_input_qs,
3002 init_data->no_output_qs)) {
3003 qdio_release_irq_memory(irq_ptr);
3004 return -ENOMEM;
3005 }
3006
3007 init_data->cdev->private->qdio_data = irq_ptr;
3008
3009 qdio_set_state(irq_ptr,QDIO_IRQ_STATE_INACTIVE);
3010
3011 return 0;
3012 }
3013
3014 int qdio_fill_irq(struct qdio_initialize *init_data)
3015 {
3016 int i;
3017 char dbf_text[15];
3018 struct ciw *ciw;
3019 int is_iqdio;
3020 struct qdio_irq *irq_ptr;
3021
3022 irq_ptr = init_data->cdev->private->qdio_data;
3023
3024 memset(irq_ptr,0,((char*)&irq_ptr->qdr)-((char*)irq_ptr));
3025
3026 /* wipes qib.ac, required by ar7063 */
3027 memset(irq_ptr->qdr,0,sizeof(struct qdr));
3028
3029 irq_ptr->int_parm=init_data->int_parm;
3030
3031 irq_ptr->schid = ccw_device_get_subchannel_id(init_data->cdev);
3032 irq_ptr->no_input_qs=init_data->no_input_qs;
3033 irq_ptr->no_output_qs=init_data->no_output_qs;
3034
3035 if (init_data->q_format==QDIO_IQDIO_QFMT) {
3036 irq_ptr->is_iqdio_irq=1;
3037 irq_ptr->is_thinint_irq=1;
3038 } else {
3039 irq_ptr->is_iqdio_irq=0;
3040 irq_ptr->is_thinint_irq=hydra_thinints;
3041 }
3042 sprintf(dbf_text,"is_i_t%1x%1x",
3043 irq_ptr->is_iqdio_irq,irq_ptr->is_thinint_irq);
3044 QDIO_DBF_TEXT2(0,setup,dbf_text);
3045
3046 if (irq_ptr->is_thinint_irq) {
3047 irq_ptr->dev_st_chg_ind = qdio_get_indicator();
3048 QDIO_DBF_HEX1(0,setup,&irq_ptr->dev_st_chg_ind,sizeof(void*));
3049 if (!irq_ptr->dev_st_chg_ind) {
3050 QDIO_PRINT_WARN("no indicator location available " \
3051 "for irq 0.%x.%x\n",
3052 irq_ptr->schid.ssid, irq_ptr->schid.sch_no);
3053 qdio_release_irq_memory(irq_ptr);
3054 return -ENOBUFS;
3055 }
3056 }
3057
3058 /* defaults */
3059 irq_ptr->equeue.cmd=DEFAULT_ESTABLISH_QS_CMD;
3060 irq_ptr->equeue.count=DEFAULT_ESTABLISH_QS_COUNT;
3061 irq_ptr->aqueue.cmd=DEFAULT_ACTIVATE_QS_CMD;
3062 irq_ptr->aqueue.count=DEFAULT_ACTIVATE_QS_COUNT;
3063
3064 qdio_fill_qs(irq_ptr, init_data->cdev,
3065 init_data->no_input_qs,
3066 init_data->no_output_qs,
3067 init_data->input_handler,
3068 init_data->output_handler,init_data->int_parm,
3069 init_data->q_format,init_data->flags,
3070 init_data->input_sbal_addr_array,
3071 init_data->output_sbal_addr_array);
3072
3073 if (!try_module_get(THIS_MODULE)) {
3074 QDIO_PRINT_CRIT("try_module_get() failed!\n");
3075 qdio_release_irq_memory(irq_ptr);
3076 return -EINVAL;
3077 }
3078
3079 qdio_fill_thresholds(irq_ptr,init_data->no_input_qs,
3080 init_data->no_output_qs,
3081 init_data->min_input_threshold,
3082 init_data->max_input_threshold,
3083 init_data->min_output_threshold,
3084 init_data->max_output_threshold);
3085
3086 /* fill in qdr */
3087 irq_ptr->qdr->qfmt=init_data->q_format;
3088 irq_ptr->qdr->iqdcnt=init_data->no_input_qs;
3089 irq_ptr->qdr->oqdcnt=init_data->no_output_qs;
3090 irq_ptr->qdr->iqdsz=sizeof(struct qdesfmt0)/4; /* size in words */
3091 irq_ptr->qdr->oqdsz=sizeof(struct qdesfmt0)/4;
3092
3093 irq_ptr->qdr->qiba=(unsigned long)&irq_ptr->qib;
3094 irq_ptr->qdr->qkey=QDIO_STORAGE_KEY;
3095
3096 /* fill in qib */
3097 irq_ptr->is_qebsm = is_passthrough;
3098 if (irq_ptr->is_qebsm)
3099 irq_ptr->qib.rflags |= QIB_RFLAGS_ENABLE_QEBSM;
3100
3101 irq_ptr->qib.qfmt=init_data->q_format;
3102 if (init_data->no_input_qs)
3103 irq_ptr->qib.isliba=(unsigned long)(irq_ptr->input_qs[0]->slib);
3104 if (init_data->no_output_qs)
3105 irq_ptr->qib.osliba=(unsigned long)(irq_ptr->output_qs[0]->slib);
3106 memcpy(irq_ptr->qib.ebcnam,init_data->adapter_name,8);
3107
3108 qdio_set_impl_params(irq_ptr,init_data->qib_param_field_format,
3109 init_data->qib_param_field,
3110 init_data->no_input_qs,
3111 init_data->no_output_qs,
3112 init_data->input_slib_elements,
3113 init_data->output_slib_elements);
3114
3115 /* first input descriptors, then output descriptors */
3116 is_iqdio = (init_data->q_format == QDIO_IQDIO_QFMT) ? 1 : 0;
3117 for (i=0;i<init_data->no_input_qs;i++)
3118 qdio_allocate_fill_input_desc(irq_ptr, i, is_iqdio);
3119
3120 for (i=0;i<init_data->no_output_qs;i++)
3121 qdio_allocate_fill_output_desc(irq_ptr, i,
3122 init_data->no_input_qs,
3123 is_iqdio);
3124
3125 /* qdr, qib, sls, slsbs, slibs, sbales filled. */
3126
3127 /* get qdio commands */
3128 ciw = ccw_device_get_ciw(init_data->cdev, CIW_TYPE_EQUEUE);
3129 if (!ciw) {
3130 QDIO_DBF_TEXT2(1,setup,"no eq");
3131 QDIO_PRINT_INFO("No equeue CIW found for QDIO commands. "
3132 "Trying to use default.\n");
3133 } else
3134 irq_ptr->equeue = *ciw;
3135 ciw = ccw_device_get_ciw(init_data->cdev, CIW_TYPE_AQUEUE);
3136 if (!ciw) {
3137 QDIO_DBF_TEXT2(1,setup,"no aq");
3138 QDIO_PRINT_INFO("No aqueue CIW found for QDIO commands. "
3139 "Trying to use default.\n");
3140 } else
3141 irq_ptr->aqueue = *ciw;
3142
3143 /* Set new interrupt handler. */
3144 irq_ptr->original_int_handler = init_data->cdev->handler;
3145 init_data->cdev->handler = qdio_handler;
3146
3147 return 0;
3148 }
3149
3150 int
3151 qdio_establish(struct qdio_initialize *init_data)
3152 {
3153 struct qdio_irq *irq_ptr;
3154 unsigned long saveflags;
3155 int result, result2;
3156 struct ccw_device *cdev;
3157 char dbf_text[20];
3158
3159 cdev=init_data->cdev;
3160 irq_ptr = cdev->private->qdio_data;
3161 if (!irq_ptr)
3162 return -EINVAL;
3163
3164 if (cdev->private->state != DEV_STATE_ONLINE)
3165 return -EINVAL;
3166
3167 down(&irq_ptr->setting_up_sema);
3168
3169 qdio_fill_irq(init_data);
3170
3171 /* the thinint CHSC stuff */
3172 if (irq_ptr->is_thinint_irq) {
3173
3174 result = tiqdio_set_subchannel_ind(irq_ptr,0);
3175 if (result) {
3176 up(&irq_ptr->setting_up_sema);
3177 qdio_shutdown(cdev, QDIO_FLAG_CLEANUP_USING_CLEAR);
3178 return result;
3179 }
3180 tiqdio_set_delay_target(irq_ptr,TIQDIO_DELAY_TARGET);
3181 }
3182
3183 sprintf(dbf_text,"qest%4x",cdev->private->schid.sch_no);
3184 QDIO_DBF_TEXT0(0,setup,dbf_text);
3185 QDIO_DBF_TEXT0(0,trace,dbf_text);
3186
3187 /* establish q */
3188 irq_ptr->ccw.cmd_code=irq_ptr->equeue.cmd;
3189 irq_ptr->ccw.flags=CCW_FLAG_SLI;
3190 irq_ptr->ccw.count=irq_ptr->equeue.count;
3191 irq_ptr->ccw.cda=QDIO_GET_ADDR(irq_ptr->qdr);
3192
3193 spin_lock_irqsave(get_ccwdev_lock(cdev),saveflags);
3194
3195 ccw_device_set_options(cdev, 0);
3196 result=ccw_device_start_timeout(cdev,&irq_ptr->ccw,
3197 QDIO_DOING_ESTABLISH,0, 0,
3198 QDIO_ESTABLISH_TIMEOUT);
3199 if (result) {
3200 result2=ccw_device_start_timeout(cdev,&irq_ptr->ccw,
3201 QDIO_DOING_ESTABLISH,0,0,
3202 QDIO_ESTABLISH_TIMEOUT);
3203 sprintf(dbf_text,"eq:io%4x",result);
3204 QDIO_DBF_TEXT2(1,setup,dbf_text);
3205 if (result2) {
3206 sprintf(dbf_text,"eq:io%4x",result);
3207 QDIO_DBF_TEXT2(1,setup,dbf_text);
3208 }
3209 QDIO_PRINT_WARN("establish queues on irq 0.%x.%04x: do_IO " \
3210 "returned %i, next try returned %i\n",
3211 irq_ptr->schid.ssid, irq_ptr->schid.sch_no,
3212 result, result2);
3213 result=result2;
3214 if (result)
3215 ccw_device_set_timeout(cdev, 0);
3216 }
3217
3218 spin_unlock_irqrestore(get_ccwdev_lock(cdev),saveflags);
3219
3220 if (result) {
3221 up(&irq_ptr->setting_up_sema);
3222 qdio_shutdown(cdev,QDIO_FLAG_CLEANUP_USING_CLEAR);
3223 return result;
3224 }
3225
3226 /* Timeout is cared for already by using ccw_device_start_timeout(). */
3227 wait_event_interruptible(cdev->private->wait_q,
3228 irq_ptr->state == QDIO_IRQ_STATE_ESTABLISHED ||
3229 irq_ptr->state == QDIO_IRQ_STATE_ERR);
3230
3231 if (irq_ptr->state == QDIO_IRQ_STATE_ESTABLISHED)
3232 result = 0;
3233 else {
3234 up(&irq_ptr->setting_up_sema);
3235 qdio_shutdown(cdev, QDIO_FLAG_CLEANUP_USING_CLEAR);
3236 return -EIO;
3237 }
3238
3239 qdio_get_ssqd_information(irq_ptr);
3240 /* if this gets set once, we're running under VM and can omit SVSes */
3241 if (irq_ptr->qdioac&CHSC_FLAG_SIGA_SYNC_NECESSARY)
3242 omit_svs=1;
3243
3244 sprintf(dbf_text,"qdioac%2x",irq_ptr->qdioac);
3245 QDIO_DBF_TEXT2(0,setup,dbf_text);
3246
3247 sprintf(dbf_text,"qib ac%2x",irq_ptr->qib.ac);
3248 QDIO_DBF_TEXT2(0,setup,dbf_text);
3249
3250 irq_ptr->hydra_gives_outbound_pcis=
3251 irq_ptr->qib.ac&QIB_AC_OUTBOUND_PCI_SUPPORTED;
3252 irq_ptr->sync_done_on_outb_pcis=
3253 irq_ptr->qdioac&CHSC_FLAG_SIGA_SYNC_DONE_ON_OUTB_PCIS;
3254
3255 qdio_initialize_set_siga_flags_input(irq_ptr);
3256 qdio_initialize_set_siga_flags_output(irq_ptr);
3257
3258 up(&irq_ptr->setting_up_sema);
3259
3260 return result;
3261
3262 }
3263
3264 int
3265 qdio_activate(struct ccw_device *cdev, int flags)
3266 {
3267 struct qdio_irq *irq_ptr;
3268 int i,result=0,result2;
3269 unsigned long saveflags;
3270 char dbf_text[20]; /* see qdio_initialize */
3271
3272 irq_ptr = cdev->private->qdio_data;
3273 if (!irq_ptr)
3274 return -ENODEV;
3275
3276 if (cdev->private->state != DEV_STATE_ONLINE)
3277 return -EINVAL;
3278
3279 down(&irq_ptr->setting_up_sema);
3280 if (irq_ptr->state==QDIO_IRQ_STATE_INACTIVE) {
3281 result=-EBUSY;
3282 goto out;
3283 }
3284
3285 sprintf(dbf_text,"qact%4x", irq_ptr->schid.sch_no);
3286 QDIO_DBF_TEXT2(0,setup,dbf_text);
3287 QDIO_DBF_TEXT2(0,trace,dbf_text);
3288
3289 /* activate q */
3290 irq_ptr->ccw.cmd_code=irq_ptr->aqueue.cmd;
3291 irq_ptr->ccw.flags=CCW_FLAG_SLI;
3292 irq_ptr->ccw.count=irq_ptr->aqueue.count;
3293 irq_ptr->ccw.cda=QDIO_GET_ADDR(0);
3294
3295 spin_lock_irqsave(get_ccwdev_lock(cdev),saveflags);
3296
3297 ccw_device_set_timeout(cdev, 0);
3298 ccw_device_set_options(cdev, CCWDEV_REPORT_ALL);
3299 result=ccw_device_start(cdev,&irq_ptr->ccw,QDIO_DOING_ACTIVATE,
3300 0, DOIO_DENY_PREFETCH);
3301 if (result) {
3302 result2=ccw_device_start(cdev,&irq_ptr->ccw,
3303 QDIO_DOING_ACTIVATE,0,0);
3304 sprintf(dbf_text,"aq:io%4x",result);
3305 QDIO_DBF_TEXT2(1,setup,dbf_text);
3306 if (result2) {
3307 sprintf(dbf_text,"aq:io%4x",result);
3308 QDIO_DBF_TEXT2(1,setup,dbf_text);
3309 }
3310 QDIO_PRINT_WARN("activate queues on irq 0.%x.%04x: do_IO " \
3311 "returned %i, next try returned %i\n",
3312 irq_ptr->schid.ssid, irq_ptr->schid.sch_no,
3313 result, result2);
3314 result=result2;
3315 }
3316
3317 spin_unlock_irqrestore(get_ccwdev_lock(cdev),saveflags);
3318 if (result)
3319 goto out;
3320
3321 for (i=0;i<irq_ptr->no_input_qs;i++) {
3322 if (irq_ptr->is_thinint_irq) {
3323 /*
3324 * that way we know, that, if we will get interrupted
3325 * by tiqdio_inbound_processing, qdio_unmark_q will
3326 * not be called
3327 */
3328 qdio_reserve_q(irq_ptr->input_qs[i]);
3329 qdio_mark_tiq(irq_ptr->input_qs[i]);
3330 qdio_release_q(irq_ptr->input_qs[i]);
3331 }
3332 }
3333
3334 if (flags&QDIO_FLAG_NO_INPUT_INTERRUPT_CONTEXT) {
3335 for (i=0;i<irq_ptr->no_input_qs;i++) {
3336 irq_ptr->input_qs[i]->is_input_q|=
3337 QDIO_FLAG_NO_INPUT_INTERRUPT_CONTEXT;
3338 }
3339 }
3340
3341 wait_event_interruptible_timeout(cdev->private->wait_q,
3342 ((irq_ptr->state ==
3343 QDIO_IRQ_STATE_STOPPED) ||
3344 (irq_ptr->state ==
3345 QDIO_IRQ_STATE_ERR)),
3346 QDIO_ACTIVATE_TIMEOUT);
3347
3348 switch (irq_ptr->state) {
3349 case QDIO_IRQ_STATE_STOPPED:
3350 case QDIO_IRQ_STATE_ERR:
3351 up(&irq_ptr->setting_up_sema);
3352 qdio_shutdown(cdev, QDIO_FLAG_CLEANUP_USING_CLEAR);
3353 down(&irq_ptr->setting_up_sema);
3354 result = -EIO;
3355 break;
3356 default:
3357 qdio_set_state(irq_ptr, QDIO_IRQ_STATE_ACTIVE);
3358 result = 0;
3359 }
3360 out:
3361 up(&irq_ptr->setting_up_sema);
3362
3363 return result;
3364 }
3365
3366 /* buffers filled forwards again to make Rick happy */
3367 static inline void
3368 qdio_do_qdio_fill_input(struct qdio_q *q, unsigned int qidx,
3369 unsigned int count, struct qdio_buffer *buffers)
3370 {
3371 struct qdio_irq *irq = (struct qdio_irq *) q->irq_ptr;
3372 qidx &= (QDIO_MAX_BUFFERS_PER_Q - 1);
3373 if (irq->is_qebsm) {
3374 while (count)
3375 set_slsb(q, &qidx, SLSB_CU_INPUT_EMPTY, &count);
3376 return;
3377 }
3378 for (;;) {
3379 set_slsb(q, &qidx, SLSB_CU_INPUT_EMPTY, &count);
3380 count--;
3381 if (!count) break;
3382 qidx = (qidx + 1) & (QDIO_MAX_BUFFERS_PER_Q - 1);
3383 }
3384 }
3385
3386 static inline void
3387 qdio_do_qdio_fill_output(struct qdio_q *q, unsigned int qidx,
3388 unsigned int count, struct qdio_buffer *buffers)
3389 {
3390 struct qdio_irq *irq = (struct qdio_irq *) q->irq_ptr;
3391
3392 qidx &= (QDIO_MAX_BUFFERS_PER_Q - 1);
3393 if (irq->is_qebsm) {
3394 while (count)
3395 set_slsb(q, &qidx, SLSB_CU_OUTPUT_PRIMED, &count);
3396 return;
3397 }
3398
3399 for (;;) {
3400 set_slsb(q, &qidx, SLSB_CU_OUTPUT_PRIMED, &count);
3401 count--;
3402 if (!count) break;
3403 qidx = (qidx + 1) & (QDIO_MAX_BUFFERS_PER_Q - 1);
3404 }
3405 }
3406
3407 static inline void
3408 do_qdio_handle_inbound(struct qdio_q *q, unsigned int callflags,
3409 unsigned int qidx, unsigned int count,
3410 struct qdio_buffer *buffers)
3411 {
3412 int used_elements;
3413
3414 /* This is the inbound handling of queues */
3415 used_elements=atomic_add_return(count, &q->number_of_buffers_used) - count;
3416
3417 qdio_do_qdio_fill_input(q,qidx,count,buffers);
3418
3419 if ((used_elements+count==QDIO_MAX_BUFFERS_PER_Q)&&
3420 (callflags&QDIO_FLAG_UNDER_INTERRUPT))
3421 atomic_xchg(&q->polling,0);
3422
3423 if (used_elements)
3424 return;
3425 if (callflags&QDIO_FLAG_DONT_SIGA)
3426 return;
3427 if (q->siga_in) {
3428 int result;
3429
3430 result=qdio_siga_input(q);
3431 if (result) {
3432 if (q->siga_error)
3433 q->error_status_flags|=
3434 QDIO_STATUS_MORE_THAN_ONE_SIGA_ERROR;
3435 q->error_status_flags|=QDIO_STATUS_LOOK_FOR_ERROR;
3436 q->siga_error=result;
3437 }
3438 }
3439
3440 qdio_mark_q(q);
3441 }
3442
3443 static inline void
3444 do_qdio_handle_outbound(struct qdio_q *q, unsigned int callflags,
3445 unsigned int qidx, unsigned int count,
3446 struct qdio_buffer *buffers)
3447 {
3448 int used_elements;
3449 unsigned int cnt, start_buf;
3450 unsigned char state = 0;
3451 struct qdio_irq *irq = (struct qdio_irq *) q->irq_ptr;
3452
3453 /* This is the outbound handling of queues */
3454 if (qdio_performance_stats)
3455 perf_stats.start_time_outbound=NOW;
3456
3457 qdio_do_qdio_fill_output(q,qidx,count,buffers);
3458
3459 used_elements=atomic_add_return(count, &q->number_of_buffers_used) - count;
3460
3461 if (callflags&QDIO_FLAG_DONT_SIGA) {
3462 if (qdio_performance_stats) {
3463 perf_stats.outbound_time+=NOW-perf_stats.start_time_outbound;
3464 perf_stats.outbound_cnt++;
3465 }
3466 return;
3467 }
3468 if (q->is_iqdio_q) {
3469 /* one siga for every sbal */
3470 while (count--)
3471 qdio_kick_outbound_q(q);
3472
3473 __qdio_outbound_processing(q);
3474 } else {
3475 /* under VM, we do a SIGA sync unconditionally */
3476 SYNC_MEMORY;
3477 else {
3478 /*
3479 * w/o shadow queues (else branch of
3480 * SYNC_MEMORY :-/ ), we try to
3481 * fast-requeue buffers
3482 */
3483 if (irq->is_qebsm) {
3484 cnt = 1;
3485 start_buf = ((qidx+QDIO_MAX_BUFFERS_PER_Q-1) &
3486 (QDIO_MAX_BUFFERS_PER_Q-1));
3487 qdio_do_eqbs(q, &state, &start_buf, &cnt);
3488 } else
3489 state = q->slsb.acc.val[(qidx+QDIO_MAX_BUFFERS_PER_Q-1)
3490 &(QDIO_MAX_BUFFERS_PER_Q-1) ];
3491 if (state != SLSB_CU_OUTPUT_PRIMED) {
3492 qdio_kick_outbound_q(q);
3493 } else {
3494 QDIO_DBF_TEXT3(0,trace, "fast-req");
3495 if (qdio_performance_stats)
3496 perf_stats.fast_reqs++;
3497 }
3498 }
3499 /*
3500 * only marking the q could take too long,
3501 * the upper layer module could do a lot of
3502 * traffic in that time
3503 */
3504 __qdio_outbound_processing(q);
3505 }
3506
3507 if (qdio_performance_stats) {
3508 perf_stats.outbound_time+=NOW-perf_stats.start_time_outbound;
3509 perf_stats.outbound_cnt++;
3510 }
3511 }
3512
3513 /* count must be 1 in iqdio */
3514 int
3515 do_QDIO(struct ccw_device *cdev,unsigned int callflags,
3516 unsigned int queue_number, unsigned int qidx,
3517 unsigned int count,struct qdio_buffer *buffers)
3518 {
3519 struct qdio_irq *irq_ptr;
3520 #ifdef CONFIG_QDIO_DEBUG
3521 char dbf_text[20];
3522
3523 sprintf(dbf_text,"doQD%04x",cdev->private->schid.sch_no);
3524 QDIO_DBF_TEXT3(0,trace,dbf_text);
3525 #endif /* CONFIG_QDIO_DEBUG */
3526
3527 if ( (qidx>QDIO_MAX_BUFFERS_PER_Q) ||
3528 (count>QDIO_MAX_BUFFERS_PER_Q) ||
3529 (queue_number>QDIO_MAX_QUEUES_PER_IRQ) )
3530 return -EINVAL;
3531
3532 if (count==0)
3533 return 0;
3534
3535 irq_ptr = cdev->private->qdio_data;
3536 if (!irq_ptr)
3537 return -ENODEV;
3538
3539 #ifdef CONFIG_QDIO_DEBUG
3540 if (callflags&QDIO_FLAG_SYNC_INPUT)
3541 QDIO_DBF_HEX3(0,trace,&irq_ptr->input_qs[queue_number],
3542 sizeof(void*));
3543 else
3544 QDIO_DBF_HEX3(0,trace,&irq_ptr->output_qs[queue_number],
3545 sizeof(void*));
3546 sprintf(dbf_text,"flag%04x",callflags);
3547 QDIO_DBF_TEXT3(0,trace,dbf_text);
3548 sprintf(dbf_text,"qi%02xct%02x",qidx,count);
3549 QDIO_DBF_TEXT3(0,trace,dbf_text);
3550 #endif /* CONFIG_QDIO_DEBUG */
3551
3552 if (irq_ptr->state!=QDIO_IRQ_STATE_ACTIVE)
3553 return -EBUSY;
3554
3555 if (callflags&QDIO_FLAG_SYNC_INPUT)
3556 do_qdio_handle_inbound(irq_ptr->input_qs[queue_number],
3557 callflags, qidx, count, buffers);
3558 else if (callflags&QDIO_FLAG_SYNC_OUTPUT)
3559 do_qdio_handle_outbound(irq_ptr->output_qs[queue_number],
3560 callflags, qidx, count, buffers);
3561 else {
3562 QDIO_DBF_TEXT3(1,trace,"doQD:inv");
3563 return -EINVAL;
3564 }
3565 return 0;
3566 }
3567
3568 static int
3569 qdio_perf_procfile_read(char *buffer, char **buffer_location, off_t offset,
3570 int buffer_length, int *eof, void *data)
3571 {
3572 int c=0;
3573
3574 /* we are always called with buffer_length=4k, so we all
3575 deliver on the first read */
3576 if (offset>0)
3577 return 0;
3578
3579 #define _OUTP_IT(x...) c+=sprintf(buffer+c,x)
3580 _OUTP_IT("i_p_nc/c=%lu/%lu\n",i_p_nc,i_p_c);
3581 _OUTP_IT("ii_p_nc/c=%lu/%lu\n",ii_p_nc,ii_p_c);
3582 _OUTP_IT("o_p_nc/c=%lu/%lu\n",o_p_nc,o_p_c);
3583 _OUTP_IT("Number of tasklet runs (total) : %lu\n",
3584 perf_stats.tl_runs);
3585 _OUTP_IT("\n");
3586 _OUTP_IT("Number of SIGA sync's issued : %lu\n",
3587 perf_stats.siga_syncs);
3588 _OUTP_IT("Number of SIGA in's issued : %lu\n",
3589 perf_stats.siga_ins);
3590 _OUTP_IT("Number of SIGA out's issued : %lu\n",
3591 perf_stats.siga_outs);
3592 _OUTP_IT("Number of PCIs caught : %lu\n",
3593 perf_stats.pcis);
3594 _OUTP_IT("Number of adapter interrupts caught : %lu\n",
3595 perf_stats.thinints);
3596 _OUTP_IT("Number of fast requeues (outg. SBALs w/o SIGA) : %lu\n",
3597 perf_stats.fast_reqs);
3598 _OUTP_IT("\n");
3599 _OUTP_IT("Total time of all inbound actions (us) incl. UL : %lu\n",
3600 perf_stats.inbound_time);
3601 _OUTP_IT("Number of inbound transfers : %lu\n",
3602 perf_stats.inbound_cnt);
3603 _OUTP_IT("Total time of all outbound do_QDIOs (us) : %lu\n",
3604 perf_stats.outbound_time);
3605 _OUTP_IT("Number of do_QDIOs outbound : %lu\n",
3606 perf_stats.outbound_cnt);
3607 _OUTP_IT("\n");
3608
3609 return c;
3610 }
3611
3612 static struct proc_dir_entry *qdio_perf_proc_file;
3613
3614 static void
3615 qdio_add_procfs_entry(void)
3616 {
3617 proc_perf_file_registration=0;
3618 qdio_perf_proc_file=create_proc_entry(QDIO_PERF,
3619 S_IFREG|0444,&proc_root);
3620 if (qdio_perf_proc_file) {
3621 qdio_perf_proc_file->read_proc=&qdio_perf_procfile_read;
3622 } else proc_perf_file_registration=-1;
3623
3624 if (proc_perf_file_registration)
3625 QDIO_PRINT_WARN("was not able to register perf. " \
3626 "proc-file (%i).\n",
3627 proc_perf_file_registration);
3628 }
3629
3630 static void
3631 qdio_remove_procfs_entry(void)
3632 {
3633 perf_stats.tl_runs=0;
3634
3635 if (!proc_perf_file_registration) /* means if it went ok earlier */
3636 remove_proc_entry(QDIO_PERF,&proc_root);
3637 }
3638
3639 /**
3640 * attributes in sysfs
3641 *****************************************************************************/
3642
3643 static ssize_t
3644 qdio_performance_stats_show(struct bus_type *bus, char *buf)
3645 {
3646 return sprintf(buf, "%i\n", qdio_performance_stats ? 1 : 0);
3647 }
3648
3649 static ssize_t
3650 qdio_performance_stats_store(struct bus_type *bus, const char *buf, size_t count)
3651 {
3652 char *tmp;
3653 int i;
3654
3655 i = simple_strtoul(buf, &tmp, 16);
3656 if ((i == 0) || (i == 1)) {
3657 if (i == qdio_performance_stats)
3658 return count;
3659 qdio_performance_stats = i;
3660 if (i==0) {
3661 /* reset perf. stat. info */
3662 i_p_nc = 0;
3663 i_p_c = 0;
3664 ii_p_nc = 0;
3665 ii_p_c = 0;
3666 o_p_nc = 0;
3667 o_p_c = 0;
3668 memset(&perf_stats, 0, sizeof(struct qdio_perf_stats));
3669 }
3670 } else {
3671 QDIO_PRINT_WARN("QDIO performance_stats: write 0 or 1 to this file!\n");
3672 return -EINVAL;
3673 }
3674 return count;
3675 }
3676
3677 static BUS_ATTR(qdio_performance_stats, 0644, qdio_performance_stats_show,
3678 qdio_performance_stats_store);
3679
3680 static void
3681 tiqdio_register_thinints(void)
3682 {
3683 char dbf_text[20];
3684 register_thinint_result=
3685 s390_register_adapter_interrupt(&tiqdio_thinint_handler);
3686 if (register_thinint_result) {
3687 sprintf(dbf_text,"regthn%x",(register_thinint_result&0xff));
3688 QDIO_DBF_TEXT0(0,setup,dbf_text);
3689 QDIO_PRINT_ERR("failed to register adapter handler " \
3690 "(rc=%i).\nAdapter interrupts might " \
3691 "not work. Continuing.\n",
3692 register_thinint_result);
3693 }
3694 }
3695
3696 static void
3697 tiqdio_unregister_thinints(void)
3698 {
3699 if (!register_thinint_result)
3700 s390_unregister_adapter_interrupt(&tiqdio_thinint_handler);
3701 }
3702
3703 static int
3704 qdio_get_qdio_memory(void)
3705 {
3706 int i;
3707 indicator_used[0]=1;
3708
3709 for (i=1;i<INDICATORS_PER_CACHELINE;i++)
3710 indicator_used[i]=0;
3711 indicators = kzalloc(sizeof(__u32)*(INDICATORS_PER_CACHELINE),
3712 GFP_KERNEL);
3713 if (!indicators)
3714 return -ENOMEM;
3715 return 0;
3716 }
3717
3718 static void
3719 qdio_release_qdio_memory(void)
3720 {
3721 kfree(indicators);
3722 }
3723
3724
3725 static void
3726 qdio_unregister_dbf_views(void)
3727 {
3728 if (qdio_dbf_setup)
3729 debug_unregister(qdio_dbf_setup);
3730 if (qdio_dbf_sbal)
3731 debug_unregister(qdio_dbf_sbal);
3732 if (qdio_dbf_sense)
3733 debug_unregister(qdio_dbf_sense);
3734 if (qdio_dbf_trace)
3735 debug_unregister(qdio_dbf_trace);
3736 #ifdef CONFIG_QDIO_DEBUG
3737 if (qdio_dbf_slsb_out)
3738 debug_unregister(qdio_dbf_slsb_out);
3739 if (qdio_dbf_slsb_in)
3740 debug_unregister(qdio_dbf_slsb_in);
3741 #endif /* CONFIG_QDIO_DEBUG */
3742 }
3743
3744 static int
3745 qdio_register_dbf_views(void)
3746 {
3747 qdio_dbf_setup=debug_register(QDIO_DBF_SETUP_NAME,
3748 QDIO_DBF_SETUP_PAGES,
3749 QDIO_DBF_SETUP_NR_AREAS,
3750 QDIO_DBF_SETUP_LEN);
3751 if (!qdio_dbf_setup)
3752 goto oom;
3753 debug_register_view(qdio_dbf_setup,&debug_hex_ascii_view);
3754 debug_set_level(qdio_dbf_setup,QDIO_DBF_SETUP_LEVEL);
3755
3756 qdio_dbf_sbal=debug_register(QDIO_DBF_SBAL_NAME,
3757 QDIO_DBF_SBAL_PAGES,
3758 QDIO_DBF_SBAL_NR_AREAS,
3759 QDIO_DBF_SBAL_LEN);
3760 if (!qdio_dbf_sbal)
3761 goto oom;
3762
3763 debug_register_view(qdio_dbf_sbal,&debug_hex_ascii_view);
3764 debug_set_level(qdio_dbf_sbal,QDIO_DBF_SBAL_LEVEL);
3765
3766 qdio_dbf_sense=debug_register(QDIO_DBF_SENSE_NAME,
3767 QDIO_DBF_SENSE_PAGES,
3768 QDIO_DBF_SENSE_NR_AREAS,
3769 QDIO_DBF_SENSE_LEN);
3770 if (!qdio_dbf_sense)
3771 goto oom;
3772
3773 debug_register_view(qdio_dbf_sense,&debug_hex_ascii_view);
3774 debug_set_level(qdio_dbf_sense,QDIO_DBF_SENSE_LEVEL);
3775
3776 qdio_dbf_trace=debug_register(QDIO_DBF_TRACE_NAME,
3777 QDIO_DBF_TRACE_PAGES,
3778 QDIO_DBF_TRACE_NR_AREAS,
3779 QDIO_DBF_TRACE_LEN);
3780 if (!qdio_dbf_trace)
3781 goto oom;
3782
3783 debug_register_view(qdio_dbf_trace,&debug_hex_ascii_view);
3784 debug_set_level(qdio_dbf_trace,QDIO_DBF_TRACE_LEVEL);
3785
3786 #ifdef CONFIG_QDIO_DEBUG
3787 qdio_dbf_slsb_out=debug_register(QDIO_DBF_SLSB_OUT_NAME,
3788 QDIO_DBF_SLSB_OUT_PAGES,
3789 QDIO_DBF_SLSB_OUT_NR_AREAS,
3790 QDIO_DBF_SLSB_OUT_LEN);
3791 if (!qdio_dbf_slsb_out)
3792 goto oom;
3793 debug_register_view(qdio_dbf_slsb_out,&debug_hex_ascii_view);
3794 debug_set_level(qdio_dbf_slsb_out,QDIO_DBF_SLSB_OUT_LEVEL);
3795
3796 qdio_dbf_slsb_in=debug_register(QDIO_DBF_SLSB_IN_NAME,
3797 QDIO_DBF_SLSB_IN_PAGES,
3798 QDIO_DBF_SLSB_IN_NR_AREAS,
3799 QDIO_DBF_SLSB_IN_LEN);
3800 if (!qdio_dbf_slsb_in)
3801 goto oom;
3802 debug_register_view(qdio_dbf_slsb_in,&debug_hex_ascii_view);
3803 debug_set_level(qdio_dbf_slsb_in,QDIO_DBF_SLSB_IN_LEVEL);
3804 #endif /* CONFIG_QDIO_DEBUG */
3805 return 0;
3806 oom:
3807 QDIO_PRINT_ERR("not enough memory for dbf.\n");
3808 qdio_unregister_dbf_views();
3809 return -ENOMEM;
3810 }
3811
3812 static void *qdio_mempool_alloc(gfp_t gfp_mask, void *size)
3813 {
3814 return (void *) get_zeroed_page(gfp_mask|GFP_DMA);
3815 }
3816
3817 static void qdio_mempool_free(void *element, void *size)
3818 {
3819 free_page((unsigned long) element);
3820 }
3821
3822 static int __init
3823 init_QDIO(void)
3824 {
3825 int res;
3826 void *ptr;
3827
3828 printk("qdio: loading %s\n",version);
3829
3830 res=qdio_get_qdio_memory();
3831 if (res)
3832 return res;
3833
3834 res = qdio_register_dbf_views();
3835 if (res)
3836 return res;
3837
3838 QDIO_DBF_TEXT0(0,setup,"initQDIO");
3839 res = bus_create_file(&ccw_bus_type, &bus_attr_qdio_performance_stats);
3840
3841 memset((void*)&perf_stats,0,sizeof(perf_stats));
3842 QDIO_DBF_TEXT0(0,setup,"perfstat");
3843 ptr=&perf_stats;
3844 QDIO_DBF_HEX0(0,setup,&ptr,sizeof(void*));
3845
3846 qdio_add_procfs_entry();
3847
3848 qdio_mempool_scssc = mempool_create(QDIO_MEMPOOL_SCSSC_ELEMENTS,
3849 qdio_mempool_alloc,
3850 qdio_mempool_free, NULL);
3851
3852 if (tiqdio_check_chsc_availability())
3853 QDIO_PRINT_ERR("Not all CHSCs supported. Continuing.\n");
3854
3855 tiqdio_register_thinints();
3856
3857 return 0;
3858 }
3859
3860 static void __exit
3861 cleanup_QDIO(void)
3862 {
3863 tiqdio_unregister_thinints();
3864 qdio_remove_procfs_entry();
3865 qdio_release_qdio_memory();
3866 qdio_unregister_dbf_views();
3867 mempool_destroy(qdio_mempool_scssc);
3868 bus_remove_file(&ccw_bus_type, &bus_attr_qdio_performance_stats);
3869 printk("qdio: %s: module removed\n",version);
3870 }
3871
3872 module_init(init_QDIO);
3873 module_exit(cleanup_QDIO);
3874
3875 EXPORT_SYMBOL(qdio_allocate);
3876 EXPORT_SYMBOL(qdio_establish);
3877 EXPORT_SYMBOL(qdio_initialize);
3878 EXPORT_SYMBOL(qdio_activate);
3879 EXPORT_SYMBOL(do_QDIO);
3880 EXPORT_SYMBOL(qdio_shutdown);
3881 EXPORT_SYMBOL(qdio_free);
3882 EXPORT_SYMBOL(qdio_cleanup);
3883 EXPORT_SYMBOL(qdio_synchronize);
Linux kernel - Deliverables
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