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[S390] Hipersocket multicast queue: make sure outbound handler is called
[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 sent
983 * buffer is already switched from PRIMED to EMPTY.
984 */
985 if ((q->queue_type == QDIO_IQDIO_QFMT_ASYNCH) &&
986 !qdio_is_outbound_q_done(q))
987 qdio_mark_q(q);
988
989 } else if (!q->hydra_gives_outbound_pcis)
990 if (!qdio_is_outbound_q_done(q))
991 qdio_mark_q(q);
992
993 qdio_release_q(q);
994 }
995
996 static void
997 qdio_outbound_processing(struct qdio_q *q)
998 {
999 __qdio_outbound_processing(q);
1000 }
1001
1002 /************************* INBOUND ROUTINES *******************************/
1003
1004
1005 static inline int
1006 qdio_get_inbound_buffer_frontier(struct qdio_q *q)
1007 {
1008 struct qdio_irq *irq;
1009 int f,f_mod_no;
1010 volatile char *slsb;
1011 unsigned int count = 1;
1012 int first_not_to_check;
1013 #ifdef CONFIG_QDIO_DEBUG
1014 char dbf_text[15];
1015 #endif /* CONFIG_QDIO_DEBUG */
1016 #ifdef QDIO_USE_PROCESSING_STATE
1017 int last_position=-1;
1018 #endif /* QDIO_USE_PROCESSING_STATE */
1019
1020 QDIO_DBF_TEXT4(0,trace,"getibfro");
1021 QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
1022
1023 irq = (struct qdio_irq *) q->irq_ptr;
1024 if (irq->is_qebsm)
1025 return qdio_qebsm_get_inbound_buffer_frontier(q);
1026
1027 slsb=&q->slsb.acc.val[0];
1028 f_mod_no=f=q->first_to_check;
1029 /*
1030 * we don't check 128 buffers, as otherwise qdio_has_inbound_q_moved
1031 * would return 0
1032 */
1033 first_not_to_check=f+qdio_min(atomic_read(&q->number_of_buffers_used),
1034 (QDIO_MAX_BUFFERS_PER_Q-1));
1035
1036 /*
1037 * we don't use this one, as a PCI or we after a thin interrupt
1038 * will sync the queues
1039 */
1040 /* SYNC_MEMORY;*/
1041
1042 check_next:
1043 f_mod_no=f&(QDIO_MAX_BUFFERS_PER_Q-1);
1044 if (f==first_not_to_check)
1045 goto out;
1046 switch (slsb[f_mod_no]) {
1047
1048 /* CU_EMPTY means frontier is reached */
1049 case SLSB_CU_INPUT_EMPTY:
1050 QDIO_DBF_TEXT5(0,trace,"inptempt");
1051 break;
1052
1053 /* P_PRIMED means set slsb to P_PROCESSING and move on */
1054 case SLSB_P_INPUT_PRIMED:
1055 QDIO_DBF_TEXT5(0,trace,"inptprim");
1056
1057 #ifdef QDIO_USE_PROCESSING_STATE
1058 /*
1059 * as soon as running under VM, polling the input queues will
1060 * kill VM in terms of CP overhead
1061 */
1062 if (q->siga_sync) {
1063 set_slsb(q, &f_mod_no, SLSB_P_INPUT_NOT_INIT, &count);
1064 } else {
1065 /* set the previous buffer to NOT_INIT. The current
1066 * buffer will be set to PROCESSING at the end of
1067 * this function to avoid further interrupts. */
1068 if (last_position>=0)
1069 set_slsb(q, &last_position,
1070 SLSB_P_INPUT_NOT_INIT, &count);
1071 atomic_set(&q->polling,1);
1072 last_position=f_mod_no;
1073 }
1074 #else /* QDIO_USE_PROCESSING_STATE */
1075 set_slsb(q, &f_mod_no, SLSB_P_INPUT_NOT_INIT, &count);
1076 #endif /* QDIO_USE_PROCESSING_STATE */
1077 /*
1078 * not needed, as the inbound queue will be synced on the next
1079 * siga-r, resp. tiqdio_is_inbound_q_done will do the siga-s
1080 */
1081 /*SYNC_MEMORY;*/
1082 f++;
1083 atomic_dec(&q->number_of_buffers_used);
1084 goto check_next;
1085
1086 case SLSB_P_INPUT_NOT_INIT:
1087 case SLSB_P_INPUT_PROCESSING:
1088 QDIO_DBF_TEXT5(0,trace,"inpnipro");
1089 break;
1090
1091 /* P_ERROR means frontier is reached, break and report error */
1092 case SLSB_P_INPUT_ERROR:
1093 #ifdef CONFIG_QDIO_DEBUG
1094 sprintf(dbf_text,"inperr%2x",f_mod_no);
1095 QDIO_DBF_TEXT3(1,trace,dbf_text);
1096 #endif /* CONFIG_QDIO_DEBUG */
1097 QDIO_DBF_HEX2(1,sbal,q->sbal[f_mod_no],256);
1098
1099 /* kind of process the buffer */
1100 set_slsb(q, &f_mod_no, SLSB_P_INPUT_NOT_INIT, &count);
1101
1102 if (q->qdio_error)
1103 q->error_status_flags|=
1104 QDIO_STATUS_MORE_THAN_ONE_QDIO_ERROR;
1105 q->qdio_error=SLSB_P_INPUT_ERROR;
1106 q->error_status_flags|=QDIO_STATUS_LOOK_FOR_ERROR;
1107
1108 /* we increment the frontier, as this buffer
1109 * was processed obviously */
1110 f_mod_no=(f_mod_no+1)&(QDIO_MAX_BUFFERS_PER_Q-1);
1111 atomic_dec(&q->number_of_buffers_used);
1112
1113 #ifdef QDIO_USE_PROCESSING_STATE
1114 last_position=-1;
1115 #endif /* QDIO_USE_PROCESSING_STATE */
1116
1117 break;
1118
1119 /* everything else means frontier not changed (HALTED or so) */
1120 default:
1121 break;
1122 }
1123 out:
1124 q->first_to_check=f_mod_no;
1125
1126 #ifdef QDIO_USE_PROCESSING_STATE
1127 if (last_position>=0)
1128 set_slsb(q, &last_position, SLSB_P_INPUT_PROCESSING, &count);
1129 #endif /* QDIO_USE_PROCESSING_STATE */
1130
1131 QDIO_DBF_HEX4(0,trace,&q->first_to_check,sizeof(int));
1132
1133 return q->first_to_check;
1134 }
1135
1136 static inline int
1137 qdio_has_inbound_q_moved(struct qdio_q *q)
1138 {
1139 int i;
1140
1141 static int old_pcis=0;
1142 static int old_thinints=0;
1143
1144 if (qdio_performance_stats) {
1145 if ((old_pcis==perf_stats.pcis)&&
1146 (old_thinints==perf_stats.thinints))
1147 perf_stats.start_time_inbound=NOW;
1148 else
1149 old_pcis=perf_stats.pcis;
1150 }
1151
1152 i=qdio_get_inbound_buffer_frontier(q);
1153 if ( (i!=GET_SAVED_FRONTIER(q)) ||
1154 (q->error_status_flags&QDIO_STATUS_LOOK_FOR_ERROR) ) {
1155 SAVE_FRONTIER(q,i);
1156 if ((!q->siga_sync)&&(!q->hydra_gives_outbound_pcis))
1157 SAVE_TIMESTAMP(q);
1158
1159 QDIO_DBF_TEXT4(0,trace,"inhasmvd");
1160 QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
1161 return 1;
1162 } else {
1163 QDIO_DBF_TEXT4(0,trace,"inhsntmv");
1164 QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
1165 return 0;
1166 }
1167 }
1168
1169 /* means, no more buffers to be filled */
1170 static inline int
1171 tiqdio_is_inbound_q_done(struct qdio_q *q)
1172 {
1173 int no_used;
1174 unsigned int start_buf, count;
1175 unsigned char state = 0;
1176 struct qdio_irq *irq = (struct qdio_irq *) q->irq_ptr;
1177
1178 #ifdef CONFIG_QDIO_DEBUG
1179 char dbf_text[15];
1180 #endif
1181
1182 no_used=atomic_read(&q->number_of_buffers_used);
1183
1184 /* propagate the change from 82 to 80 through VM */
1185 SYNC_MEMORY;
1186
1187 #ifdef CONFIG_QDIO_DEBUG
1188 if (no_used) {
1189 sprintf(dbf_text,"iqisnt%02x",no_used);
1190 QDIO_DBF_TEXT4(0,trace,dbf_text);
1191 } else {
1192 QDIO_DBF_TEXT4(0,trace,"iniqisdo");
1193 }
1194 QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
1195 #endif /* CONFIG_QDIO_DEBUG */
1196
1197 if (!no_used)
1198 return 1;
1199 if (!q->siga_sync && !irq->is_qebsm)
1200 /* we'll check for more primed buffers in qeth_stop_polling */
1201 return 0;
1202 if (irq->is_qebsm) {
1203 count = 1;
1204 start_buf = q->first_to_check;
1205 qdio_do_eqbs(q, &state, &start_buf, &count);
1206 } else
1207 state = q->slsb.acc.val[q->first_to_check];
1208 if (state != SLSB_P_INPUT_PRIMED)
1209 /*
1210 * nothing more to do, if next buffer is not PRIMED.
1211 * note that we did a SYNC_MEMORY before, that there
1212 * has been a sychnronization.
1213 * we will return 0 below, as there is nothing to do
1214 * (stop_polling not necessary, as we have not been
1215 * using the PROCESSING state
1216 */
1217 return 0;
1218
1219 /*
1220 * ok, the next input buffer is primed. that means, that device state
1221 * change indicator and adapter local summary are set, so we will find
1222 * it next time.
1223 * we will return 0 below, as there is nothing to do, except scheduling
1224 * ourselves for the next time.
1225 */
1226 tiqdio_set_summary_bit((__u32*)q->dev_st_chg_ind);
1227 tiqdio_sched_tl();
1228 return 0;
1229 }
1230
1231 static inline int
1232 qdio_is_inbound_q_done(struct qdio_q *q)
1233 {
1234 int no_used;
1235 unsigned int start_buf, count;
1236 unsigned char state = 0;
1237 struct qdio_irq *irq = (struct qdio_irq *) q->irq_ptr;
1238
1239 #ifdef CONFIG_QDIO_DEBUG
1240 char dbf_text[15];
1241 #endif
1242
1243 no_used=atomic_read(&q->number_of_buffers_used);
1244
1245 /*
1246 * we need that one for synchronization with the adapter, as it
1247 * does a kind of PCI avoidance
1248 */
1249 SYNC_MEMORY;
1250
1251 if (!no_used) {
1252 QDIO_DBF_TEXT4(0,trace,"inqisdnA");
1253 QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
1254 QDIO_DBF_TEXT4(0,trace,dbf_text);
1255 return 1;
1256 }
1257 if (irq->is_qebsm) {
1258 count = 1;
1259 start_buf = q->first_to_check;
1260 qdio_do_eqbs(q, &state, &start_buf, &count);
1261 } else
1262 state = q->slsb.acc.val[q->first_to_check];
1263 if (state == SLSB_P_INPUT_PRIMED) {
1264 /* we got something to do */
1265 QDIO_DBF_TEXT4(0,trace,"inqisntA");
1266 QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
1267 return 0;
1268 }
1269
1270 /* on VM, we don't poll, so the q is always done here */
1271 if (q->siga_sync)
1272 return 1;
1273 if (q->hydra_gives_outbound_pcis)
1274 return 1;
1275
1276 /*
1277 * at this point we know, that inbound first_to_check
1278 * has (probably) not moved (see qdio_inbound_processing)
1279 */
1280 if (NOW>GET_SAVED_TIMESTAMP(q)+q->timing.threshold) {
1281 #ifdef CONFIG_QDIO_DEBUG
1282 QDIO_DBF_TEXT4(0,trace,"inqisdon");
1283 QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
1284 sprintf(dbf_text,"pf%02xcn%02x",q->first_to_check,no_used);
1285 QDIO_DBF_TEXT4(0,trace,dbf_text);
1286 #endif /* CONFIG_QDIO_DEBUG */
1287 return 1;
1288 } else {
1289 #ifdef CONFIG_QDIO_DEBUG
1290 QDIO_DBF_TEXT4(0,trace,"inqisntd");
1291 QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
1292 sprintf(dbf_text,"pf%02xcn%02x",q->first_to_check,no_used);
1293 QDIO_DBF_TEXT4(0,trace,dbf_text);
1294 #endif /* CONFIG_QDIO_DEBUG */
1295 return 0;
1296 }
1297 }
1298
1299 static inline void
1300 qdio_kick_inbound_handler(struct qdio_q *q)
1301 {
1302 int count, start, end, real_end, i;
1303 #ifdef CONFIG_QDIO_DEBUG
1304 char dbf_text[15];
1305 #endif
1306
1307 QDIO_DBF_TEXT4(0,trace,"kickinh");
1308 QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
1309
1310 start=q->first_element_to_kick;
1311 real_end=q->first_to_check;
1312 end=(real_end+QDIO_MAX_BUFFERS_PER_Q-1)&(QDIO_MAX_BUFFERS_PER_Q-1);
1313
1314 i=start;
1315 count=0;
1316 while (1) {
1317 count++;
1318 if (i==end)
1319 break;
1320 i=(i+1)&(QDIO_MAX_BUFFERS_PER_Q-1);
1321 }
1322
1323 #ifdef CONFIG_QDIO_DEBUG
1324 sprintf(dbf_text,"s=%2xc=%2x",start,count);
1325 QDIO_DBF_TEXT4(0,trace,dbf_text);
1326 #endif /* CONFIG_QDIO_DEBUG */
1327
1328 if (likely(q->state==QDIO_IRQ_STATE_ACTIVE))
1329 q->handler(q->cdev,
1330 QDIO_STATUS_INBOUND_INT|q->error_status_flags,
1331 q->qdio_error,q->siga_error,q->q_no,start,count,
1332 q->int_parm);
1333
1334 /* for the next time: */
1335 q->first_element_to_kick=real_end;
1336 q->qdio_error=0;
1337 q->siga_error=0;
1338 q->error_status_flags=0;
1339
1340 if (qdio_performance_stats) {
1341 perf_stats.inbound_time+=NOW-perf_stats.start_time_inbound;
1342 perf_stats.inbound_cnt++;
1343 }
1344 }
1345
1346 static inline void
1347 __tiqdio_inbound_processing(struct qdio_q *q, int spare_ind_was_set)
1348 {
1349 struct qdio_irq *irq_ptr;
1350 struct qdio_q *oq;
1351 int i;
1352
1353 QDIO_DBF_TEXT4(0,trace,"iqinproc");
1354 QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
1355
1356 /*
1357 * we first want to reserve the q, so that we know, that we don't
1358 * interrupt ourselves and call qdio_unmark_q, as is_in_shutdown might
1359 * be set
1360 */
1361 if (unlikely(qdio_reserve_q(q))) {
1362 qdio_release_q(q);
1363 if (qdio_performance_stats)
1364 ii_p_c++;
1365 /*
1366 * as we might just be about to stop polling, we make
1367 * sure that we check again at least once more
1368 */
1369 tiqdio_sched_tl();
1370 return;
1371 }
1372 if (qdio_performance_stats)
1373 ii_p_nc++;
1374 if (unlikely(atomic_read(&q->is_in_shutdown))) {
1375 qdio_unmark_q(q);
1376 goto out;
1377 }
1378
1379 /*
1380 * we reset spare_ind_was_set, when the queue does not use the
1381 * spare indicator
1382 */
1383 if (spare_ind_was_set)
1384 spare_ind_was_set = (q->dev_st_chg_ind == &spare_indicator);
1385
1386 if (!(*(q->dev_st_chg_ind)) && !spare_ind_was_set)
1387 goto out;
1388 /*
1389 * q->dev_st_chg_ind is the indicator, be it shared or not.
1390 * only clear it, if indicator is non-shared
1391 */
1392 if (!spare_ind_was_set)
1393 tiqdio_clear_summary_bit((__u32*)q->dev_st_chg_ind);
1394
1395 if (q->hydra_gives_outbound_pcis) {
1396 if (!q->siga_sync_done_on_thinints) {
1397 SYNC_MEMORY_ALL;
1398 } else if ((!q->siga_sync_done_on_outb_tis)&&
1399 (q->hydra_gives_outbound_pcis)) {
1400 SYNC_MEMORY_ALL_OUTB;
1401 }
1402 } else {
1403 SYNC_MEMORY;
1404 }
1405 /*
1406 * maybe we have to do work on our outbound queues... at least
1407 * we have to check the outbound-int-capable thinint-capable
1408 * queues
1409 */
1410 if (q->hydra_gives_outbound_pcis) {
1411 irq_ptr = (struct qdio_irq*)q->irq_ptr;
1412 for (i=0;i<irq_ptr->no_output_qs;i++) {
1413 oq = irq_ptr->output_qs[i];
1414 if (!qdio_is_outbound_q_done(oq)) {
1415 if (qdio_performance_stats)
1416 perf_stats.tl_runs--;
1417 __qdio_outbound_processing(oq);
1418 }
1419 }
1420 }
1421
1422 if (!qdio_has_inbound_q_moved(q))
1423 goto out;
1424
1425 qdio_kick_inbound_handler(q);
1426 if (tiqdio_is_inbound_q_done(q))
1427 if (!qdio_stop_polling(q)) {
1428 /*
1429 * we set the flags to get into the stuff next time,
1430 * see also comment in qdio_stop_polling
1431 */
1432 tiqdio_set_summary_bit((__u32*)q->dev_st_chg_ind);
1433 tiqdio_sched_tl();
1434 }
1435 out:
1436 qdio_release_q(q);
1437 }
1438
1439 static void
1440 tiqdio_inbound_processing(struct qdio_q *q)
1441 {
1442 __tiqdio_inbound_processing(q, atomic_read(&spare_indicator_usecount));
1443 }
1444
1445 static inline void
1446 __qdio_inbound_processing(struct qdio_q *q)
1447 {
1448 int q_laps=0;
1449
1450 QDIO_DBF_TEXT4(0,trace,"qinproc");
1451 QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
1452
1453 if (unlikely(qdio_reserve_q(q))) {
1454 qdio_release_q(q);
1455 if (qdio_performance_stats)
1456 i_p_c++;
1457 /* as we're sissies, we'll check next time */
1458 if (likely(!atomic_read(&q->is_in_shutdown))) {
1459 qdio_mark_q(q);
1460 QDIO_DBF_TEXT4(0,trace,"busy,agn");
1461 }
1462 return;
1463 }
1464 if (qdio_performance_stats) {
1465 i_p_nc++;
1466 perf_stats.tl_runs++;
1467 }
1468
1469 again:
1470 if (qdio_has_inbound_q_moved(q)) {
1471 qdio_kick_inbound_handler(q);
1472 if (!qdio_stop_polling(q)) {
1473 q_laps++;
1474 if (q_laps<QDIO_Q_LAPS)
1475 goto again;
1476 }
1477 qdio_mark_q(q);
1478 } else {
1479 if (!qdio_is_inbound_q_done(q))
1480 /* means poll time is not yet over */
1481 qdio_mark_q(q);
1482 }
1483
1484 qdio_release_q(q);
1485 }
1486
1487 static void
1488 qdio_inbound_processing(struct qdio_q *q)
1489 {
1490 __qdio_inbound_processing(q);
1491 }
1492
1493 /************************* MAIN ROUTINES *******************************/
1494
1495 #ifdef QDIO_USE_PROCESSING_STATE
1496 static inline int
1497 tiqdio_reset_processing_state(struct qdio_q *q, int q_laps)
1498 {
1499 if (!q) {
1500 tiqdio_sched_tl();
1501 return 0;
1502 }
1503
1504 /*
1505 * under VM, we have not used the PROCESSING state, so no
1506 * need to stop polling
1507 */
1508 if (q->siga_sync)
1509 return 2;
1510
1511 if (unlikely(qdio_reserve_q(q))) {
1512 qdio_release_q(q);
1513 if (qdio_performance_stats)
1514 ii_p_c++;
1515 /*
1516 * as we might just be about to stop polling, we make
1517 * sure that we check again at least once more
1518 */
1519
1520 /*
1521 * sanity -- we'd get here without setting the
1522 * dev st chg ind
1523 */
1524 tiqdio_set_summary_bit((__u32*)q->dev_st_chg_ind);
1525 tiqdio_sched_tl();
1526 return 0;
1527 }
1528 if (qdio_stop_polling(q)) {
1529 qdio_release_q(q);
1530 return 2;
1531 }
1532 if (q_laps<QDIO_Q_LAPS-1) {
1533 qdio_release_q(q);
1534 return 3;
1535 }
1536 /*
1537 * we set the flags to get into the stuff
1538 * next time, see also comment in qdio_stop_polling
1539 */
1540 tiqdio_set_summary_bit((__u32*)q->dev_st_chg_ind);
1541 tiqdio_sched_tl();
1542 qdio_release_q(q);
1543 return 1;
1544
1545 }
1546 #endif /* QDIO_USE_PROCESSING_STATE */
1547
1548 static inline void
1549 tiqdio_inbound_checks(void)
1550 {
1551 struct qdio_q *q;
1552 int spare_ind_was_set=0;
1553 #ifdef QDIO_USE_PROCESSING_STATE
1554 int q_laps=0;
1555 #endif /* QDIO_USE_PROCESSING_STATE */
1556
1557 QDIO_DBF_TEXT4(0,trace,"iqdinbck");
1558 QDIO_DBF_TEXT5(0,trace,"iqlocsum");
1559
1560 #ifdef QDIO_USE_PROCESSING_STATE
1561 again:
1562 #endif /* QDIO_USE_PROCESSING_STATE */
1563
1564 /* when the spare indicator is used and set, save that and clear it */
1565 if ((atomic_read(&spare_indicator_usecount)) && spare_indicator) {
1566 spare_ind_was_set = 1;
1567 tiqdio_clear_summary_bit((__u32*)&spare_indicator);
1568 }
1569
1570 q=(struct qdio_q*)tiq_list;
1571 do {
1572 if (!q)
1573 break;
1574 __tiqdio_inbound_processing(q, spare_ind_was_set);
1575 q=(struct qdio_q*)q->list_next;
1576 } while (q!=(struct qdio_q*)tiq_list);
1577
1578 #ifdef QDIO_USE_PROCESSING_STATE
1579 q=(struct qdio_q*)tiq_list;
1580 do {
1581 int ret;
1582
1583 ret = tiqdio_reset_processing_state(q, q_laps);
1584 switch (ret) {
1585 case 0:
1586 return;
1587 case 1:
1588 q_laps++;
1589 case 2:
1590 q = (struct qdio_q*)q->list_next;
1591 break;
1592 default:
1593 q_laps++;
1594 goto again;
1595 }
1596 } while (q!=(struct qdio_q*)tiq_list);
1597 #endif /* QDIO_USE_PROCESSING_STATE */
1598 }
1599
1600 static void
1601 tiqdio_tl(unsigned long data)
1602 {
1603 QDIO_DBF_TEXT4(0,trace,"iqdio_tl");
1604
1605 if (qdio_performance_stats)
1606 perf_stats.tl_runs++;
1607
1608 tiqdio_inbound_checks();
1609 }
1610
1611 /********************* GENERAL HELPER_ROUTINES ***********************/
1612
1613 static void
1614 qdio_release_irq_memory(struct qdio_irq *irq_ptr)
1615 {
1616 int i;
1617
1618 for (i=0;i<QDIO_MAX_QUEUES_PER_IRQ;i++) {
1619 if (!irq_ptr->input_qs[i])
1620 goto next;
1621
1622 kfree(irq_ptr->input_qs[i]->slib);
1623 kfree(irq_ptr->input_qs[i]);
1624
1625 next:
1626 if (!irq_ptr->output_qs[i])
1627 continue;
1628
1629 kfree(irq_ptr->output_qs[i]->slib);
1630 kfree(irq_ptr->output_qs[i]);
1631
1632 }
1633 kfree(irq_ptr->qdr);
1634 free_page((unsigned long) irq_ptr);
1635 }
1636
1637 static void
1638 qdio_set_impl_params(struct qdio_irq *irq_ptr,
1639 unsigned int qib_param_field_format,
1640 /* pointer to 128 bytes or NULL, if no param field */
1641 unsigned char *qib_param_field,
1642 /* pointer to no_queues*128 words of data or NULL */
1643 unsigned int no_input_qs,
1644 unsigned int no_output_qs,
1645 unsigned long *input_slib_elements,
1646 unsigned long *output_slib_elements)
1647 {
1648 int i,j;
1649
1650 if (!irq_ptr)
1651 return;
1652
1653 irq_ptr->qib.pfmt=qib_param_field_format;
1654 if (qib_param_field)
1655 memcpy(irq_ptr->qib.parm,qib_param_field,
1656 QDIO_MAX_BUFFERS_PER_Q);
1657
1658 if (input_slib_elements)
1659 for (i=0;i<no_input_qs;i++) {
1660 for (j=0;j<QDIO_MAX_BUFFERS_PER_Q;j++)
1661 irq_ptr->input_qs[i]->slib->slibe[j].parms=
1662 input_slib_elements[
1663 i*QDIO_MAX_BUFFERS_PER_Q+j];
1664 }
1665 if (output_slib_elements)
1666 for (i=0;i<no_output_qs;i++) {
1667 for (j=0;j<QDIO_MAX_BUFFERS_PER_Q;j++)
1668 irq_ptr->output_qs[i]->slib->slibe[j].parms=
1669 output_slib_elements[
1670 i*QDIO_MAX_BUFFERS_PER_Q+j];
1671 }
1672 }
1673
1674 static int
1675 qdio_alloc_qs(struct qdio_irq *irq_ptr,
1676 int no_input_qs, int no_output_qs)
1677 {
1678 int i;
1679 struct qdio_q *q;
1680 int result=-ENOMEM;
1681
1682 for (i=0;i<no_input_qs;i++) {
1683 q = kzalloc(sizeof(struct qdio_q), GFP_KERNEL);
1684
1685 if (!q) {
1686 QDIO_PRINT_ERR("kmalloc of q failed!\n");
1687 goto out;
1688 }
1689
1690 q->slib = kmalloc(PAGE_SIZE, GFP_KERNEL);
1691 if (!q->slib) {
1692 QDIO_PRINT_ERR("kmalloc of slib failed!\n");
1693 goto out;
1694 }
1695
1696 irq_ptr->input_qs[i]=q;
1697 }
1698
1699 for (i=0;i<no_output_qs;i++) {
1700 q = kzalloc(sizeof(struct qdio_q), GFP_KERNEL);
1701
1702 if (!q) {
1703 goto out;
1704 }
1705
1706 q->slib=kmalloc(PAGE_SIZE,GFP_KERNEL);
1707 if (!q->slib) {
1708 QDIO_PRINT_ERR("kmalloc of slib failed!\n");
1709 goto out;
1710 }
1711
1712 irq_ptr->output_qs[i]=q;
1713 }
1714
1715 result=0;
1716 out:
1717 return result;
1718 }
1719
1720 static void
1721 qdio_fill_qs(struct qdio_irq *irq_ptr, struct ccw_device *cdev,
1722 int no_input_qs, int no_output_qs,
1723 qdio_handler_t *input_handler,
1724 qdio_handler_t *output_handler,
1725 unsigned long int_parm,int q_format,
1726 unsigned long flags,
1727 void **inbound_sbals_array,
1728 void **outbound_sbals_array)
1729 {
1730 struct qdio_q *q;
1731 int i,j;
1732 char dbf_text[20]; /* see qdio_initialize */
1733 void *ptr;
1734 int available;
1735
1736 sprintf(dbf_text,"qfqs%4x",cdev->private->schid.sch_no);
1737 QDIO_DBF_TEXT0(0,setup,dbf_text);
1738 for (i=0;i<no_input_qs;i++) {
1739 q=irq_ptr->input_qs[i];
1740
1741 memset(q,0,((char*)&q->slib)-((char*)q));
1742 sprintf(dbf_text,"in-q%4x",i);
1743 QDIO_DBF_TEXT0(0,setup,dbf_text);
1744 QDIO_DBF_HEX0(0,setup,&q,sizeof(void*));
1745
1746 memset(q->slib,0,PAGE_SIZE);
1747 q->sl=(struct sl*)(((char*)q->slib)+PAGE_SIZE/2);
1748
1749 available=0;
1750
1751 for (j=0;j<QDIO_MAX_BUFFERS_PER_Q;j++)
1752 q->sbal[j]=*(inbound_sbals_array++);
1753
1754 q->queue_type=q_format;
1755 q->int_parm=int_parm;
1756 q->schid = irq_ptr->schid;
1757 q->irq_ptr = irq_ptr;
1758 q->cdev = cdev;
1759 q->mask=1<<(31-i);
1760 q->q_no=i;
1761 q->is_input_q=1;
1762 q->first_to_check=0;
1763 q->last_move_ftc=0;
1764 q->handler=input_handler;
1765 q->dev_st_chg_ind=irq_ptr->dev_st_chg_ind;
1766
1767 q->tasklet.data=(unsigned long)q;
1768 /* q->is_thinint_q isn't valid at this time, but
1769 * irq_ptr->is_thinint_irq is */
1770 q->tasklet.func=(void(*)(unsigned long))
1771 ((irq_ptr->is_thinint_irq)?&tiqdio_inbound_processing:
1772 &qdio_inbound_processing);
1773
1774 /* actually this is not used for inbound queues. yet. */
1775 atomic_set(&q->busy_siga_counter,0);
1776 q->timing.busy_start=0;
1777
1778 /* for (j=0;j<QDIO_STATS_NUMBER;j++)
1779 q->timing.last_transfer_times[j]=(qdio_get_micros()/
1780 QDIO_STATS_NUMBER)*j;
1781 q->timing.last_transfer_index=QDIO_STATS_NUMBER-1;
1782 */
1783
1784 /* fill in slib */
1785 if (i>0) irq_ptr->input_qs[i-1]->slib->nsliba=
1786 (unsigned long)(q->slib);
1787 q->slib->sla=(unsigned long)(q->sl);
1788 q->slib->slsba=(unsigned long)(&q->slsb.acc.val[0]);
1789
1790 /* fill in sl */
1791 for (j=0;j<QDIO_MAX_BUFFERS_PER_Q;j++)
1792 q->sl->element[j].sbal=(unsigned long)(q->sbal[j]);
1793
1794 QDIO_DBF_TEXT2(0,setup,"sl-sb-b0");
1795 ptr=(void*)q->sl;
1796 QDIO_DBF_HEX2(0,setup,&ptr,sizeof(void*));
1797 ptr=(void*)&q->slsb;
1798 QDIO_DBF_HEX2(0,setup,&ptr,sizeof(void*));
1799 ptr=(void*)q->sbal[0];
1800 QDIO_DBF_HEX2(0,setup,&ptr,sizeof(void*));
1801
1802 /* fill in slsb */
1803 if (!irq_ptr->is_qebsm) {
1804 unsigned int count = 1;
1805 for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; j++)
1806 set_slsb(q, &j, SLSB_P_INPUT_NOT_INIT, &count);
1807 }
1808 }
1809
1810 for (i=0;i<no_output_qs;i++) {
1811 q=irq_ptr->output_qs[i];
1812 memset(q,0,((char*)&q->slib)-((char*)q));
1813
1814 sprintf(dbf_text,"outq%4x",i);
1815 QDIO_DBF_TEXT0(0,setup,dbf_text);
1816 QDIO_DBF_HEX0(0,setup,&q,sizeof(void*));
1817
1818 memset(q->slib,0,PAGE_SIZE);
1819 q->sl=(struct sl*)(((char*)q->slib)+PAGE_SIZE/2);
1820
1821 available=0;
1822
1823 for (j=0;j<QDIO_MAX_BUFFERS_PER_Q;j++)
1824 q->sbal[j]=*(outbound_sbals_array++);
1825
1826 q->queue_type=q_format;
1827 if ((q->queue_type == QDIO_IQDIO_QFMT) &&
1828 (no_output_qs > 1) &&
1829 (i == no_output_qs-1))
1830 q->queue_type = QDIO_IQDIO_QFMT_ASYNCH;
1831 q->int_parm=int_parm;
1832 q->is_input_q=0;
1833 q->schid = irq_ptr->schid;
1834 q->cdev = cdev;
1835 q->irq_ptr = irq_ptr;
1836 q->mask=1<<(31-i);
1837 q->q_no=i;
1838 q->first_to_check=0;
1839 q->last_move_ftc=0;
1840 q->handler=output_handler;
1841
1842 q->tasklet.data=(unsigned long)q;
1843 q->tasklet.func=(void(*)(unsigned long))
1844 &qdio_outbound_processing;
1845
1846 atomic_set(&q->busy_siga_counter,0);
1847 q->timing.busy_start=0;
1848
1849 /* fill in slib */
1850 if (i>0) irq_ptr->output_qs[i-1]->slib->nsliba=
1851 (unsigned long)(q->slib);
1852 q->slib->sla=(unsigned long)(q->sl);
1853 q->slib->slsba=(unsigned long)(&q->slsb.acc.val[0]);
1854
1855 /* fill in sl */
1856 for (j=0;j<QDIO_MAX_BUFFERS_PER_Q;j++)
1857 q->sl->element[j].sbal=(unsigned long)(q->sbal[j]);
1858
1859 QDIO_DBF_TEXT2(0,setup,"sl-sb-b0");
1860 ptr=(void*)q->sl;
1861 QDIO_DBF_HEX2(0,setup,&ptr,sizeof(void*));
1862 ptr=(void*)&q->slsb;
1863 QDIO_DBF_HEX2(0,setup,&ptr,sizeof(void*));
1864 ptr=(void*)q->sbal[0];
1865 QDIO_DBF_HEX2(0,setup,&ptr,sizeof(void*));
1866
1867 /* fill in slsb */
1868 if (!irq_ptr->is_qebsm) {
1869 unsigned int count = 1;
1870 for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; j++)
1871 set_slsb(q, &j, SLSB_P_OUTPUT_NOT_INIT, &count);
1872 }
1873 }
1874 }
1875
1876 static void
1877 qdio_fill_thresholds(struct qdio_irq *irq_ptr,
1878 unsigned int no_input_qs,
1879 unsigned int no_output_qs,
1880 unsigned int min_input_threshold,
1881 unsigned int max_input_threshold,
1882 unsigned int min_output_threshold,
1883 unsigned int max_output_threshold)
1884 {
1885 int i;
1886 struct qdio_q *q;
1887
1888 for (i=0;i<no_input_qs;i++) {
1889 q=irq_ptr->input_qs[i];
1890 q->timing.threshold=max_input_threshold;
1891 /* for (j=0;j<QDIO_STATS_CLASSES;j++) {
1892 q->threshold_classes[j].threshold=
1893 min_input_threshold+
1894 (max_input_threshold-min_input_threshold)/
1895 QDIO_STATS_CLASSES;
1896 }
1897 qdio_use_thresholds(q,QDIO_STATS_CLASSES/2);*/
1898 }
1899 for (i=0;i<no_output_qs;i++) {
1900 q=irq_ptr->output_qs[i];
1901 q->timing.threshold=max_output_threshold;
1902 /* for (j=0;j<QDIO_STATS_CLASSES;j++) {
1903 q->threshold_classes[j].threshold=
1904 min_output_threshold+
1905 (max_output_threshold-min_output_threshold)/
1906 QDIO_STATS_CLASSES;
1907 }
1908 qdio_use_thresholds(q,QDIO_STATS_CLASSES/2);*/
1909 }
1910 }
1911
1912 static int
1913 tiqdio_thinint_handler(void)
1914 {
1915 QDIO_DBF_TEXT4(0,trace,"thin_int");
1916
1917 if (qdio_performance_stats) {
1918 perf_stats.thinints++;
1919 perf_stats.start_time_inbound=NOW;
1920 }
1921
1922 /* SVS only when needed:
1923 * issue SVS to benefit from iqdio interrupt avoidance
1924 * (SVS clears AISOI)*/
1925 if (!omit_svs)
1926 tiqdio_clear_global_summary();
1927
1928 tiqdio_inbound_checks();
1929 return 0;
1930 }
1931
1932 static void
1933 qdio_set_state(struct qdio_irq *irq_ptr, enum qdio_irq_states state)
1934 {
1935 int i;
1936 #ifdef CONFIG_QDIO_DEBUG
1937 char dbf_text[15];
1938
1939 QDIO_DBF_TEXT5(0,trace,"newstate");
1940 sprintf(dbf_text,"%4x%4x",irq_ptr->schid.sch_no,state);
1941 QDIO_DBF_TEXT5(0,trace,dbf_text);
1942 #endif /* CONFIG_QDIO_DEBUG */
1943
1944 irq_ptr->state=state;
1945 for (i=0;i<irq_ptr->no_input_qs;i++)
1946 irq_ptr->input_qs[i]->state=state;
1947 for (i=0;i<irq_ptr->no_output_qs;i++)
1948 irq_ptr->output_qs[i]->state=state;
1949 mb();
1950 }
1951
1952 static inline void
1953 qdio_irq_check_sense(struct subchannel_id schid, struct irb *irb)
1954 {
1955 char dbf_text[15];
1956
1957 if (irb->esw.esw0.erw.cons) {
1958 sprintf(dbf_text,"sens%4x",schid.sch_no);
1959 QDIO_DBF_TEXT2(1,trace,dbf_text);
1960 QDIO_DBF_HEX0(0,sense,irb,QDIO_DBF_SENSE_LEN);
1961
1962 QDIO_PRINT_WARN("sense data available on qdio channel.\n");
1963 QDIO_HEXDUMP16(WARN,"irb: ",irb);
1964 QDIO_HEXDUMP16(WARN,"sense data: ",irb->ecw);
1965 }
1966
1967 }
1968
1969 static inline void
1970 qdio_handle_pci(struct qdio_irq *irq_ptr)
1971 {
1972 int i;
1973 struct qdio_q *q;
1974
1975 if (qdio_performance_stats) {
1976 perf_stats.pcis++;
1977 perf_stats.start_time_inbound=NOW;
1978 }
1979 for (i=0;i<irq_ptr->no_input_qs;i++) {
1980 q=irq_ptr->input_qs[i];
1981 if (q->is_input_q&QDIO_FLAG_NO_INPUT_INTERRUPT_CONTEXT)
1982 qdio_mark_q(q);
1983 else {
1984 if (qdio_performance_stats)
1985 perf_stats.tl_runs--;
1986 __qdio_inbound_processing(q);
1987 }
1988 }
1989 if (!irq_ptr->hydra_gives_outbound_pcis)
1990 return;
1991 for (i=0;i<irq_ptr->no_output_qs;i++) {
1992 q=irq_ptr->output_qs[i];
1993 if (qdio_is_outbound_q_done(q))
1994 continue;
1995 if (qdio_performance_stats)
1996 perf_stats.tl_runs--;
1997 if (!irq_ptr->sync_done_on_outb_pcis)
1998 SYNC_MEMORY;
1999 __qdio_outbound_processing(q);
2000 }
2001 }
2002
2003 static void qdio_establish_handle_irq(struct ccw_device*, int, int);
2004
2005 static inline void
2006 qdio_handle_activate_check(struct ccw_device *cdev, unsigned long intparm,
2007 int cstat, int dstat)
2008 {
2009 struct qdio_irq *irq_ptr;
2010 struct qdio_q *q;
2011 char dbf_text[15];
2012
2013 irq_ptr = cdev->private->qdio_data;
2014
2015 QDIO_DBF_TEXT2(1, trace, "ick2");
2016 sprintf(dbf_text,"%s", cdev->dev.bus_id);
2017 QDIO_DBF_TEXT2(1,trace,dbf_text);
2018 QDIO_DBF_HEX2(0,trace,&intparm,sizeof(int));
2019 QDIO_DBF_HEX2(0,trace,&dstat,sizeof(int));
2020 QDIO_DBF_HEX2(0,trace,&cstat,sizeof(int));
2021 QDIO_PRINT_ERR("received check condition on activate " \
2022 "queues on device %s (cs=x%x, ds=x%x).\n",
2023 cdev->dev.bus_id, cstat, dstat);
2024 if (irq_ptr->no_input_qs) {
2025 q=irq_ptr->input_qs[0];
2026 } else if (irq_ptr->no_output_qs) {
2027 q=irq_ptr->output_qs[0];
2028 } else {
2029 QDIO_PRINT_ERR("oops... no queue registered for device %s!?\n",
2030 cdev->dev.bus_id);
2031 goto omit_handler_call;
2032 }
2033 q->handler(q->cdev,QDIO_STATUS_ACTIVATE_CHECK_CONDITION|
2034 QDIO_STATUS_LOOK_FOR_ERROR,
2035 0,0,0,-1,-1,q->int_parm);
2036 omit_handler_call:
2037 qdio_set_state(irq_ptr,QDIO_IRQ_STATE_STOPPED);
2038
2039 }
2040
2041 static void
2042 qdio_call_shutdown(struct work_struct *work)
2043 {
2044 struct ccw_device_private *priv;
2045 struct ccw_device *cdev;
2046
2047 priv = container_of(work, struct ccw_device_private, kick_work);
2048 cdev = priv->cdev;
2049 qdio_shutdown(cdev, QDIO_FLAG_CLEANUP_USING_CLEAR);
2050 put_device(&cdev->dev);
2051 }
2052
2053 static void
2054 qdio_timeout_handler(struct ccw_device *cdev)
2055 {
2056 struct qdio_irq *irq_ptr;
2057 char dbf_text[15];
2058
2059 QDIO_DBF_TEXT2(0, trace, "qtoh");
2060 sprintf(dbf_text, "%s", cdev->dev.bus_id);
2061 QDIO_DBF_TEXT2(0, trace, dbf_text);
2062
2063 irq_ptr = cdev->private->qdio_data;
2064 sprintf(dbf_text, "state:%d", irq_ptr->state);
2065 QDIO_DBF_TEXT2(0, trace, dbf_text);
2066
2067 switch (irq_ptr->state) {
2068 case QDIO_IRQ_STATE_INACTIVE:
2069 QDIO_PRINT_ERR("establish queues on irq 0.%x.%04x: timed out\n",
2070 irq_ptr->schid.ssid, irq_ptr->schid.sch_no);
2071 QDIO_DBF_TEXT2(1,setup,"eq:timeo");
2072 qdio_set_state(irq_ptr, QDIO_IRQ_STATE_ERR);
2073 break;
2074 case QDIO_IRQ_STATE_CLEANUP:
2075 QDIO_PRINT_INFO("Did not get interrupt on cleanup, "
2076 "irq=0.%x.%x.\n",
2077 irq_ptr->schid.ssid, irq_ptr->schid.sch_no);
2078 qdio_set_state(irq_ptr, QDIO_IRQ_STATE_ERR);
2079 break;
2080 case QDIO_IRQ_STATE_ESTABLISHED:
2081 case QDIO_IRQ_STATE_ACTIVE:
2082 /* I/O has been terminated by common I/O layer. */
2083 QDIO_PRINT_INFO("Queues on irq 0.%x.%04x killed by cio.\n",
2084 irq_ptr->schid.ssid, irq_ptr->schid.sch_no);
2085 QDIO_DBF_TEXT2(1, trace, "cio:term");
2086 qdio_set_state(irq_ptr, QDIO_IRQ_STATE_STOPPED);
2087 if (get_device(&cdev->dev)) {
2088 /* Can't call shutdown from interrupt context. */
2089 PREPARE_WORK(&cdev->private->kick_work,
2090 qdio_call_shutdown);
2091 queue_work(ccw_device_work, &cdev->private->kick_work);
2092 }
2093 break;
2094 default:
2095 BUG();
2096 }
2097 ccw_device_set_timeout(cdev, 0);
2098 wake_up(&cdev->private->wait_q);
2099 }
2100
2101 static void
2102 qdio_handler(struct ccw_device *cdev, unsigned long intparm, struct irb *irb)
2103 {
2104 struct qdio_irq *irq_ptr;
2105 int cstat,dstat;
2106 char dbf_text[15];
2107
2108 #ifdef CONFIG_QDIO_DEBUG
2109 QDIO_DBF_TEXT4(0, trace, "qint");
2110 sprintf(dbf_text, "%s", cdev->dev.bus_id);
2111 QDIO_DBF_TEXT4(0, trace, dbf_text);
2112 #endif /* CONFIG_QDIO_DEBUG */
2113
2114 if (!intparm) {
2115 QDIO_PRINT_ERR("got unsolicited interrupt in qdio " \
2116 "handler, device %s\n", cdev->dev.bus_id);
2117 return;
2118 }
2119
2120 irq_ptr = cdev->private->qdio_data;
2121 if (!irq_ptr) {
2122 QDIO_DBF_TEXT2(1, trace, "uint");
2123 sprintf(dbf_text,"%s", cdev->dev.bus_id);
2124 QDIO_DBF_TEXT2(1,trace,dbf_text);
2125 QDIO_PRINT_ERR("received interrupt on unused device %s!\n",
2126 cdev->dev.bus_id);
2127 return;
2128 }
2129
2130 if (IS_ERR(irb)) {
2131 /* Currently running i/o is in error. */
2132 switch (PTR_ERR(irb)) {
2133 case -EIO:
2134 QDIO_PRINT_ERR("i/o error on device %s\n",
2135 cdev->dev.bus_id);
2136 return;
2137 case -ETIMEDOUT:
2138 qdio_timeout_handler(cdev);
2139 return;
2140 default:
2141 QDIO_PRINT_ERR("unknown error state %ld on device %s\n",
2142 PTR_ERR(irb), cdev->dev.bus_id);
2143 return;
2144 }
2145 }
2146
2147 qdio_irq_check_sense(irq_ptr->schid, irb);
2148
2149 #ifdef CONFIG_QDIO_DEBUG
2150 sprintf(dbf_text, "state:%d", irq_ptr->state);
2151 QDIO_DBF_TEXT4(0, trace, dbf_text);
2152 #endif /* CONFIG_QDIO_DEBUG */
2153
2154 cstat = irb->scsw.cstat;
2155 dstat = irb->scsw.dstat;
2156
2157 switch (irq_ptr->state) {
2158 case QDIO_IRQ_STATE_INACTIVE:
2159 qdio_establish_handle_irq(cdev, cstat, dstat);
2160 break;
2161
2162 case QDIO_IRQ_STATE_CLEANUP:
2163 qdio_set_state(irq_ptr, QDIO_IRQ_STATE_INACTIVE);
2164 break;
2165
2166 case QDIO_IRQ_STATE_ESTABLISHED:
2167 case QDIO_IRQ_STATE_ACTIVE:
2168 if (cstat & SCHN_STAT_PCI) {
2169 qdio_handle_pci(irq_ptr);
2170 break;
2171 }
2172
2173 if ((cstat&~SCHN_STAT_PCI)||dstat) {
2174 qdio_handle_activate_check(cdev, intparm, cstat, dstat);
2175 break;
2176 }
2177 default:
2178 QDIO_PRINT_ERR("got interrupt for queues in state %d on " \
2179 "device %s?!\n",
2180 irq_ptr->state, cdev->dev.bus_id);
2181 }
2182 wake_up(&cdev->private->wait_q);
2183
2184 }
2185
2186 int
2187 qdio_synchronize(struct ccw_device *cdev, unsigned int flags,
2188 unsigned int queue_number)
2189 {
2190 int cc = 0;
2191 struct qdio_q *q;
2192 struct qdio_irq *irq_ptr;
2193 void *ptr;
2194 #ifdef CONFIG_QDIO_DEBUG
2195 char dbf_text[15]="SyncXXXX";
2196 #endif
2197
2198 irq_ptr = cdev->private->qdio_data;
2199 if (!irq_ptr)
2200 return -ENODEV;
2201
2202 #ifdef CONFIG_QDIO_DEBUG
2203 *((int*)(&dbf_text[4])) = irq_ptr->schid.sch_no;
2204 QDIO_DBF_HEX4(0,trace,dbf_text,QDIO_DBF_TRACE_LEN);
2205 *((int*)(&dbf_text[0]))=flags;
2206 *((int*)(&dbf_text[4]))=queue_number;
2207 QDIO_DBF_HEX4(0,trace,dbf_text,QDIO_DBF_TRACE_LEN);
2208 #endif /* CONFIG_QDIO_DEBUG */
2209
2210 if (flags&QDIO_FLAG_SYNC_INPUT) {
2211 q=irq_ptr->input_qs[queue_number];
2212 if (!q)
2213 return -EINVAL;
2214 if (!(irq_ptr->is_qebsm))
2215 cc = do_siga_sync(q->schid, 0, q->mask);
2216 } else if (flags&QDIO_FLAG_SYNC_OUTPUT) {
2217 q=irq_ptr->output_qs[queue_number];
2218 if (!q)
2219 return -EINVAL;
2220 if (!(irq_ptr->is_qebsm))
2221 cc = do_siga_sync(q->schid, q->mask, 0);
2222 } else
2223 return -EINVAL;
2224
2225 ptr=&cc;
2226 if (cc)
2227 QDIO_DBF_HEX3(0,trace,&ptr,sizeof(int));
2228
2229 return cc;
2230 }
2231
2232 static inline void
2233 qdio_check_subchannel_qebsm(struct qdio_irq *irq_ptr, unsigned char qdioac,
2234 unsigned long token)
2235 {
2236 struct qdio_q *q;
2237 int i;
2238 unsigned int count, start_buf;
2239 char dbf_text[15];
2240
2241 /*check if QEBSM is disabled */
2242 if (!(irq_ptr->is_qebsm) || !(qdioac & 0x01)) {
2243 irq_ptr->is_qebsm = 0;
2244 irq_ptr->sch_token = 0;
2245 irq_ptr->qib.rflags &= ~QIB_RFLAGS_ENABLE_QEBSM;
2246 QDIO_DBF_TEXT0(0,setup,"noV=V");
2247 return;
2248 }
2249 irq_ptr->sch_token = token;
2250 /*input queue*/
2251 for (i = 0; i < irq_ptr->no_input_qs;i++) {
2252 q = irq_ptr->input_qs[i];
2253 count = QDIO_MAX_BUFFERS_PER_Q;
2254 start_buf = 0;
2255 set_slsb(q, &start_buf, SLSB_P_INPUT_NOT_INIT, &count);
2256 }
2257 sprintf(dbf_text,"V=V:%2x",irq_ptr->is_qebsm);
2258 QDIO_DBF_TEXT0(0,setup,dbf_text);
2259 sprintf(dbf_text,"%8lx",irq_ptr->sch_token);
2260 QDIO_DBF_TEXT0(0,setup,dbf_text);
2261 /*output queue*/
2262 for (i = 0; i < irq_ptr->no_output_qs; i++) {
2263 q = irq_ptr->output_qs[i];
2264 count = QDIO_MAX_BUFFERS_PER_Q;
2265 start_buf = 0;
2266 set_slsb(q, &start_buf, SLSB_P_OUTPUT_NOT_INIT, &count);
2267 }
2268 }
2269
2270 static void
2271 qdio_get_ssqd_information(struct qdio_irq *irq_ptr)
2272 {
2273 int result;
2274 unsigned char qdioac;
2275 struct {
2276 struct chsc_header request;
2277 u16 reserved1:10;
2278 u16 ssid:2;
2279 u16 fmt:4;
2280 u16 first_sch;
2281 u16 reserved2;
2282 u16 last_sch;
2283 u32 reserved3;
2284 struct chsc_header response;
2285 u32 reserved4;
2286 u8 flags;
2287 u8 reserved5;
2288 u16 sch;
2289 u8 qfmt;
2290 u8 parm;
2291 u8 qdioac1;
2292 u8 sch_class;
2293 u8 reserved7;
2294 u8 icnt;
2295 u8 reserved8;
2296 u8 ocnt;
2297 u8 reserved9;
2298 u8 mbccnt;
2299 u16 qdioac2;
2300 u64 sch_token;
2301 } *ssqd_area;
2302
2303 QDIO_DBF_TEXT0(0,setup,"getssqd");
2304 qdioac = 0;
2305 ssqd_area = mempool_alloc(qdio_mempool_scssc, GFP_ATOMIC);
2306 if (!ssqd_area) {
2307 QDIO_PRINT_WARN("Could not get memory for chsc. Using all " \
2308 "SIGAs for sch x%x.\n", irq_ptr->schid.sch_no);
2309 irq_ptr->qdioac = CHSC_FLAG_SIGA_INPUT_NECESSARY ||
2310 CHSC_FLAG_SIGA_OUTPUT_NECESSARY ||
2311 CHSC_FLAG_SIGA_SYNC_NECESSARY; /* all flags set */
2312 irq_ptr->is_qebsm = 0;
2313 irq_ptr->sch_token = 0;
2314 irq_ptr->qib.rflags &= ~QIB_RFLAGS_ENABLE_QEBSM;
2315 return;
2316 }
2317
2318 ssqd_area->request = (struct chsc_header) {
2319 .length = 0x0010,
2320 .code = 0x0024,
2321 };
2322 ssqd_area->first_sch = irq_ptr->schid.sch_no;
2323 ssqd_area->last_sch = irq_ptr->schid.sch_no;
2324 ssqd_area->ssid = irq_ptr->schid.ssid;
2325 result = chsc(ssqd_area);
2326
2327 if (result) {
2328 QDIO_PRINT_WARN("CHSC returned cc %i. Using all " \
2329 "SIGAs for sch 0.%x.%x.\n", result,
2330 irq_ptr->schid.ssid, irq_ptr->schid.sch_no);
2331 qdioac = CHSC_FLAG_SIGA_INPUT_NECESSARY ||
2332 CHSC_FLAG_SIGA_OUTPUT_NECESSARY ||
2333 CHSC_FLAG_SIGA_SYNC_NECESSARY; /* all flags set */
2334 irq_ptr->is_qebsm = 0;
2335 goto out;
2336 }
2337
2338 if (ssqd_area->response.code != QDIO_CHSC_RESPONSE_CODE_OK) {
2339 QDIO_PRINT_WARN("response upon checking SIGA needs " \
2340 "is 0x%x. Using all SIGAs for sch 0.%x.%x.\n",
2341 ssqd_area->response.code,
2342 irq_ptr->schid.ssid, irq_ptr->schid.sch_no);
2343 qdioac = CHSC_FLAG_SIGA_INPUT_NECESSARY ||
2344 CHSC_FLAG_SIGA_OUTPUT_NECESSARY ||
2345 CHSC_FLAG_SIGA_SYNC_NECESSARY; /* all flags set */
2346 irq_ptr->is_qebsm = 0;
2347 goto out;
2348 }
2349 if (!(ssqd_area->flags & CHSC_FLAG_QDIO_CAPABILITY) ||
2350 !(ssqd_area->flags & CHSC_FLAG_VALIDITY) ||
2351 (ssqd_area->sch != irq_ptr->schid.sch_no)) {
2352 QDIO_PRINT_WARN("huh? problems checking out sch 0.%x.%x... " \
2353 "using all SIGAs.\n",
2354 irq_ptr->schid.ssid, irq_ptr->schid.sch_no);
2355 qdioac = CHSC_FLAG_SIGA_INPUT_NECESSARY |
2356 CHSC_FLAG_SIGA_OUTPUT_NECESSARY |
2357 CHSC_FLAG_SIGA_SYNC_NECESSARY; /* worst case */
2358 irq_ptr->is_qebsm = 0;
2359 goto out;
2360 }
2361 qdioac = ssqd_area->qdioac1;
2362 out:
2363 qdio_check_subchannel_qebsm(irq_ptr, qdioac,
2364 ssqd_area->sch_token);
2365 mempool_free(ssqd_area, qdio_mempool_scssc);
2366 irq_ptr->qdioac = qdioac;
2367 }
2368
2369 static unsigned int
2370 tiqdio_check_chsc_availability(void)
2371 {
2372 char dbf_text[15];
2373
2374 if (!css_characteristics_avail)
2375 return -EIO;
2376
2377 /* Check for bit 41. */
2378 if (!css_general_characteristics.aif) {
2379 QDIO_PRINT_WARN("Adapter interruption facility not " \
2380 "installed.\n");
2381 return -ENOENT;
2382 }
2383
2384 /* Check for bits 107 and 108. */
2385 if (!css_chsc_characteristics.scssc ||
2386 !css_chsc_characteristics.scsscf) {
2387 QDIO_PRINT_WARN("Set Chan Subsys. Char. & Fast-CHSCs " \
2388 "not available.\n");
2389 return -ENOENT;
2390 }
2391
2392 /* Check for OSA/FCP thin interrupts (bit 67). */
2393 hydra_thinints = css_general_characteristics.aif_osa;
2394 sprintf(dbf_text,"hydrati%1x", hydra_thinints);
2395 QDIO_DBF_TEXT0(0,setup,dbf_text);
2396
2397 #ifdef CONFIG_64BIT
2398 /* Check for QEBSM support in general (bit 58). */
2399 is_passthrough = css_general_characteristics.qebsm;
2400 #endif
2401 sprintf(dbf_text,"cssQBS:%1x", is_passthrough);
2402 QDIO_DBF_TEXT0(0,setup,dbf_text);
2403
2404 /* Check for aif time delay disablement fac (bit 56). If installed,
2405 * omit svs even under lpar (good point by rick again) */
2406 omit_svs = css_general_characteristics.aif_tdd;
2407 sprintf(dbf_text,"omitsvs%1x", omit_svs);
2408 QDIO_DBF_TEXT0(0,setup,dbf_text);
2409 return 0;
2410 }
2411
2412
2413 static unsigned int
2414 tiqdio_set_subchannel_ind(struct qdio_irq *irq_ptr, int reset_to_zero)
2415 {
2416 unsigned long real_addr_local_summary_bit;
2417 unsigned long real_addr_dev_st_chg_ind;
2418 void *ptr;
2419 char dbf_text[15];
2420
2421 unsigned int resp_code;
2422 int result;
2423
2424 struct {
2425 struct chsc_header request;
2426 u16 operation_code;
2427 u16 reserved1;
2428 u32 reserved2;
2429 u32 reserved3;
2430 u64 summary_indicator_addr;
2431 u64 subchannel_indicator_addr;
2432 u32 ks:4;
2433 u32 kc:4;
2434 u32 reserved4:21;
2435 u32 isc:3;
2436 u32 word_with_d_bit;
2437 /* set to 0x10000000 to enable
2438 * time delay disablement facility */
2439 u32 reserved5;
2440 struct subchannel_id schid;
2441 u32 reserved6[1004];
2442 struct chsc_header response;
2443 u32 reserved7;
2444 } *scssc_area;
2445
2446 if (!irq_ptr->is_thinint_irq)
2447 return -ENODEV;
2448
2449 if (reset_to_zero) {
2450 real_addr_local_summary_bit=0;
2451 real_addr_dev_st_chg_ind=0;
2452 } else {
2453 real_addr_local_summary_bit=
2454 virt_to_phys((volatile void *)indicators);
2455 real_addr_dev_st_chg_ind=
2456 virt_to_phys((volatile void *)irq_ptr->dev_st_chg_ind);
2457 }
2458
2459 scssc_area = mempool_alloc(qdio_mempool_scssc, GFP_ATOMIC);
2460 if (!scssc_area) {
2461 QDIO_PRINT_WARN("No memory for setting indicators on " \
2462 "subchannel 0.%x.%x.\n",
2463 irq_ptr->schid.ssid, irq_ptr->schid.sch_no);
2464 return -ENOMEM;
2465 }
2466 scssc_area->request = (struct chsc_header) {
2467 .length = 0x0fe0,
2468 .code = 0x0021,
2469 };
2470 scssc_area->operation_code = 0;
2471
2472 scssc_area->summary_indicator_addr = real_addr_local_summary_bit;
2473 scssc_area->subchannel_indicator_addr = real_addr_dev_st_chg_ind;
2474 scssc_area->ks = QDIO_STORAGE_KEY;
2475 scssc_area->kc = QDIO_STORAGE_KEY;
2476 scssc_area->isc = TIQDIO_THININT_ISC;
2477 scssc_area->schid = irq_ptr->schid;
2478 /* enables the time delay disablement facility. Don't care
2479 * whether it is really there (i.e. we haven't checked for
2480 * it) */
2481 if (css_general_characteristics.aif_tdd)
2482 scssc_area->word_with_d_bit = 0x10000000;
2483 else
2484 QDIO_PRINT_WARN("Time delay disablement facility " \
2485 "not available\n");
2486
2487 result = chsc(scssc_area);
2488 if (result) {
2489 QDIO_PRINT_WARN("could not set indicators on irq 0.%x.%x, " \
2490 "cc=%i.\n",
2491 irq_ptr->schid.ssid, irq_ptr->schid.sch_no,result);
2492 result = -EIO;
2493 goto out;
2494 }
2495
2496 resp_code = scssc_area->response.code;
2497 if (resp_code!=QDIO_CHSC_RESPONSE_CODE_OK) {
2498 QDIO_PRINT_WARN("response upon setting indicators " \
2499 "is 0x%x.\n",resp_code);
2500 sprintf(dbf_text,"sidR%4x",resp_code);
2501 QDIO_DBF_TEXT1(0,trace,dbf_text);
2502 QDIO_DBF_TEXT1(0,setup,dbf_text);
2503 ptr=&scssc_area->response;
2504 QDIO_DBF_HEX2(1,setup,&ptr,QDIO_DBF_SETUP_LEN);
2505 result = -EIO;
2506 goto out;
2507 }
2508
2509 QDIO_DBF_TEXT2(0,setup,"setscind");
2510 QDIO_DBF_HEX2(0,setup,&real_addr_local_summary_bit,
2511 sizeof(unsigned long));
2512 QDIO_DBF_HEX2(0,setup,&real_addr_dev_st_chg_ind,sizeof(unsigned long));
2513 result = 0;
2514 out:
2515 mempool_free(scssc_area, qdio_mempool_scssc);
2516 return result;
2517
2518 }
2519
2520 static unsigned int
2521 tiqdio_set_delay_target(struct qdio_irq *irq_ptr, unsigned long delay_target)
2522 {
2523 unsigned int resp_code;
2524 int result;
2525 void *ptr;
2526 char dbf_text[15];
2527
2528 struct {
2529 struct chsc_header request;
2530 u16 operation_code;
2531 u16 reserved1;
2532 u32 reserved2;
2533 u32 reserved3;
2534 u32 reserved4[2];
2535 u32 delay_target;
2536 u32 reserved5[1009];
2537 struct chsc_header response;
2538 u32 reserved6;
2539 } *scsscf_area;
2540
2541 if (!irq_ptr->is_thinint_irq)
2542 return -ENODEV;
2543
2544 scsscf_area = mempool_alloc(qdio_mempool_scssc, GFP_ATOMIC);
2545 if (!scsscf_area) {
2546 QDIO_PRINT_WARN("No memory for setting delay target on " \
2547 "subchannel 0.%x.%x.\n",
2548 irq_ptr->schid.ssid, irq_ptr->schid.sch_no);
2549 return -ENOMEM;
2550 }
2551 scsscf_area->request = (struct chsc_header) {
2552 .length = 0x0fe0,
2553 .code = 0x1027,
2554 };
2555
2556 scsscf_area->delay_target = delay_target<<16;
2557
2558 result=chsc(scsscf_area);
2559 if (result) {
2560 QDIO_PRINT_WARN("could not set delay target on irq 0.%x.%x, " \
2561 "cc=%i. Continuing.\n",
2562 irq_ptr->schid.ssid, irq_ptr->schid.sch_no,
2563 result);
2564 result = -EIO;
2565 goto out;
2566 }
2567
2568 resp_code = scsscf_area->response.code;
2569 if (resp_code!=QDIO_CHSC_RESPONSE_CODE_OK) {
2570 QDIO_PRINT_WARN("response upon setting delay target " \
2571 "is 0x%x. Continuing.\n",resp_code);
2572 sprintf(dbf_text,"sdtR%4x",resp_code);
2573 QDIO_DBF_TEXT1(0,trace,dbf_text);
2574 QDIO_DBF_TEXT1(0,setup,dbf_text);
2575 ptr=&scsscf_area->response;
2576 QDIO_DBF_HEX2(1,trace,&ptr,QDIO_DBF_TRACE_LEN);
2577 }
2578 QDIO_DBF_TEXT2(0,trace,"delytrgt");
2579 QDIO_DBF_HEX2(0,trace,&delay_target,sizeof(unsigned long));
2580 result = 0; /* not critical */
2581 out:
2582 mempool_free(scsscf_area, qdio_mempool_scssc);
2583 return result;
2584 }
2585
2586 int
2587 qdio_cleanup(struct ccw_device *cdev, int how)
2588 {
2589 struct qdio_irq *irq_ptr;
2590 char dbf_text[15];
2591 int rc;
2592
2593 irq_ptr = cdev->private->qdio_data;
2594 if (!irq_ptr)
2595 return -ENODEV;
2596
2597 sprintf(dbf_text,"qcln%4x",irq_ptr->schid.sch_no);
2598 QDIO_DBF_TEXT1(0,trace,dbf_text);
2599 QDIO_DBF_TEXT0(0,setup,dbf_text);
2600
2601 rc = qdio_shutdown(cdev, how);
2602 if ((rc == 0) || (rc == -EINPROGRESS))
2603 rc = qdio_free(cdev);
2604 return rc;
2605 }
2606
2607 int
2608 qdio_shutdown(struct ccw_device *cdev, int how)
2609 {
2610 struct qdio_irq *irq_ptr;
2611 int i;
2612 int result = 0;
2613 int rc;
2614 unsigned long flags;
2615 int timeout;
2616 char dbf_text[15];
2617
2618 irq_ptr = cdev->private->qdio_data;
2619 if (!irq_ptr)
2620 return -ENODEV;
2621
2622 down(&irq_ptr->setting_up_sema);
2623
2624 sprintf(dbf_text,"qsqs%4x",irq_ptr->schid.sch_no);
2625 QDIO_DBF_TEXT1(0,trace,dbf_text);
2626 QDIO_DBF_TEXT0(0,setup,dbf_text);
2627
2628 /* mark all qs as uninteresting */
2629 for (i=0;i<irq_ptr->no_input_qs;i++)
2630 atomic_set(&irq_ptr->input_qs[i]->is_in_shutdown,1);
2631
2632 for (i=0;i<irq_ptr->no_output_qs;i++)
2633 atomic_set(&irq_ptr->output_qs[i]->is_in_shutdown,1);
2634
2635 tasklet_kill(&tiqdio_tasklet);
2636
2637 for (i=0;i<irq_ptr->no_input_qs;i++) {
2638 qdio_unmark_q(irq_ptr->input_qs[i]);
2639 tasklet_kill(&irq_ptr->input_qs[i]->tasklet);
2640 wait_event_interruptible_timeout(cdev->private->wait_q,
2641 !atomic_read(&irq_ptr->
2642 input_qs[i]->
2643 use_count),
2644 QDIO_NO_USE_COUNT_TIMEOUT);
2645 if (atomic_read(&irq_ptr->input_qs[i]->use_count))
2646 result=-EINPROGRESS;
2647 }
2648
2649 for (i=0;i<irq_ptr->no_output_qs;i++) {
2650 tasklet_kill(&irq_ptr->output_qs[i]->tasklet);
2651 wait_event_interruptible_timeout(cdev->private->wait_q,
2652 !atomic_read(&irq_ptr->
2653 output_qs[i]->
2654 use_count),
2655 QDIO_NO_USE_COUNT_TIMEOUT);
2656 if (atomic_read(&irq_ptr->output_qs[i]->use_count))
2657 result=-EINPROGRESS;
2658 }
2659
2660 /* cleanup subchannel */
2661 spin_lock_irqsave(get_ccwdev_lock(cdev),flags);
2662 if (how&QDIO_FLAG_CLEANUP_USING_CLEAR) {
2663 rc = ccw_device_clear(cdev, QDIO_DOING_CLEANUP);
2664 timeout=QDIO_CLEANUP_CLEAR_TIMEOUT;
2665 } else if (how&QDIO_FLAG_CLEANUP_USING_HALT) {
2666 rc = ccw_device_halt(cdev, QDIO_DOING_CLEANUP);
2667 timeout=QDIO_CLEANUP_HALT_TIMEOUT;
2668 } else { /* default behaviour */
2669 rc = ccw_device_halt(cdev, QDIO_DOING_CLEANUP);
2670 timeout=QDIO_CLEANUP_HALT_TIMEOUT;
2671 }
2672 if (rc == -ENODEV) {
2673 /* No need to wait for device no longer present. */
2674 qdio_set_state(irq_ptr, QDIO_IRQ_STATE_INACTIVE);
2675 spin_unlock_irqrestore(get_ccwdev_lock(cdev), flags);
2676 } else if (((void *)cdev->handler != (void *)qdio_handler) && rc == 0) {
2677 /*
2678 * Whoever put another handler there, has to cope with the
2679 * interrupt theirself. Might happen if qdio_shutdown was
2680 * called on already shutdown queues, but this shouldn't have
2681 * bad side effects.
2682 */
2683 qdio_set_state(irq_ptr, QDIO_IRQ_STATE_INACTIVE);
2684 spin_unlock_irqrestore(get_ccwdev_lock(cdev), flags);
2685 } else if (rc == 0) {
2686 qdio_set_state(irq_ptr, QDIO_IRQ_STATE_CLEANUP);
2687 ccw_device_set_timeout(cdev, timeout);
2688 spin_unlock_irqrestore(get_ccwdev_lock(cdev),flags);
2689
2690 wait_event(cdev->private->wait_q,
2691 irq_ptr->state == QDIO_IRQ_STATE_INACTIVE ||
2692 irq_ptr->state == QDIO_IRQ_STATE_ERR);
2693 } else {
2694 QDIO_PRINT_INFO("ccw_device_{halt,clear} returned %d for "
2695 "device %s\n", result, cdev->dev.bus_id);
2696 spin_unlock_irqrestore(get_ccwdev_lock(cdev), flags);
2697 result = rc;
2698 goto out;
2699 }
2700 if (irq_ptr->is_thinint_irq) {
2701 qdio_put_indicator((__u32*)irq_ptr->dev_st_chg_ind);
2702 tiqdio_set_subchannel_ind(irq_ptr,1);
2703 /* reset adapter interrupt indicators */
2704 }
2705
2706 /* exchange int handlers, if necessary */
2707 if ((void*)cdev->handler == (void*)qdio_handler)
2708 cdev->handler=irq_ptr->original_int_handler;
2709
2710 /* Ignore errors. */
2711 qdio_set_state(irq_ptr, QDIO_IRQ_STATE_INACTIVE);
2712 ccw_device_set_timeout(cdev, 0);
2713 out:
2714 up(&irq_ptr->setting_up_sema);
2715 return result;
2716 }
2717
2718 int
2719 qdio_free(struct ccw_device *cdev)
2720 {
2721 struct qdio_irq *irq_ptr;
2722 char dbf_text[15];
2723
2724 irq_ptr = cdev->private->qdio_data;
2725 if (!irq_ptr)
2726 return -ENODEV;
2727
2728 down(&irq_ptr->setting_up_sema);
2729
2730 sprintf(dbf_text,"qfqs%4x",irq_ptr->schid.sch_no);
2731 QDIO_DBF_TEXT1(0,trace,dbf_text);
2732 QDIO_DBF_TEXT0(0,setup,dbf_text);
2733
2734 cdev->private->qdio_data = NULL;
2735
2736 up(&irq_ptr->setting_up_sema);
2737
2738 qdio_release_irq_memory(irq_ptr);
2739 module_put(THIS_MODULE);
2740 return 0;
2741 }
2742
2743 static inline void
2744 qdio_allocate_do_dbf(struct qdio_initialize *init_data)
2745 {
2746 char dbf_text[20]; /* if a printf printed out more than 8 chars */
2747
2748 sprintf(dbf_text,"qfmt:%x",init_data->q_format);
2749 QDIO_DBF_TEXT0(0,setup,dbf_text);
2750 QDIO_DBF_HEX0(0,setup,init_data->adapter_name,8);
2751 sprintf(dbf_text,"qpff%4x",init_data->qib_param_field_format);
2752 QDIO_DBF_TEXT0(0,setup,dbf_text);
2753 QDIO_DBF_HEX0(0,setup,&init_data->qib_param_field,sizeof(char*));
2754 QDIO_DBF_HEX0(0,setup,&init_data->input_slib_elements,sizeof(long*));
2755 QDIO_DBF_HEX0(0,setup,&init_data->output_slib_elements,sizeof(long*));
2756 sprintf(dbf_text,"miit%4x",init_data->min_input_threshold);
2757 QDIO_DBF_TEXT0(0,setup,dbf_text);
2758 sprintf(dbf_text,"mait%4x",init_data->max_input_threshold);
2759 QDIO_DBF_TEXT0(0,setup,dbf_text);
2760 sprintf(dbf_text,"miot%4x",init_data->min_output_threshold);
2761 QDIO_DBF_TEXT0(0,setup,dbf_text);
2762 sprintf(dbf_text,"maot%4x",init_data->max_output_threshold);
2763 QDIO_DBF_TEXT0(0,setup,dbf_text);
2764 sprintf(dbf_text,"niq:%4x",init_data->no_input_qs);
2765 QDIO_DBF_TEXT0(0,setup,dbf_text);
2766 sprintf(dbf_text,"noq:%4x",init_data->no_output_qs);
2767 QDIO_DBF_TEXT0(0,setup,dbf_text);
2768 QDIO_DBF_HEX0(0,setup,&init_data->input_handler,sizeof(void*));
2769 QDIO_DBF_HEX0(0,setup,&init_data->output_handler,sizeof(void*));
2770 QDIO_DBF_HEX0(0,setup,&init_data->int_parm,sizeof(long));
2771 QDIO_DBF_HEX0(0,setup,&init_data->flags,sizeof(long));
2772 QDIO_DBF_HEX0(0,setup,&init_data->input_sbal_addr_array,sizeof(void*));
2773 QDIO_DBF_HEX0(0,setup,&init_data->output_sbal_addr_array,sizeof(void*));
2774 }
2775
2776 static inline void
2777 qdio_allocate_fill_input_desc(struct qdio_irq *irq_ptr, int i, int iqfmt)
2778 {
2779 irq_ptr->input_qs[i]->is_iqdio_q = iqfmt;
2780 irq_ptr->input_qs[i]->is_thinint_q = irq_ptr->is_thinint_irq;
2781
2782 irq_ptr->qdr->qdf0[i].sliba=(unsigned long)(irq_ptr->input_qs[i]->slib);
2783
2784 irq_ptr->qdr->qdf0[i].sla=(unsigned long)(irq_ptr->input_qs[i]->sl);
2785
2786 irq_ptr->qdr->qdf0[i].slsba=
2787 (unsigned long)(&irq_ptr->input_qs[i]->slsb.acc.val[0]);
2788
2789 irq_ptr->qdr->qdf0[i].akey=QDIO_STORAGE_KEY;
2790 irq_ptr->qdr->qdf0[i].bkey=QDIO_STORAGE_KEY;
2791 irq_ptr->qdr->qdf0[i].ckey=QDIO_STORAGE_KEY;
2792 irq_ptr->qdr->qdf0[i].dkey=QDIO_STORAGE_KEY;
2793 }
2794
2795 static inline void
2796 qdio_allocate_fill_output_desc(struct qdio_irq *irq_ptr, int i,
2797 int j, int iqfmt)
2798 {
2799 irq_ptr->output_qs[i]->is_iqdio_q = iqfmt;
2800 irq_ptr->output_qs[i]->is_thinint_q = irq_ptr->is_thinint_irq;
2801
2802 irq_ptr->qdr->qdf0[i+j].sliba=(unsigned long)(irq_ptr->output_qs[i]->slib);
2803
2804 irq_ptr->qdr->qdf0[i+j].sla=(unsigned long)(irq_ptr->output_qs[i]->sl);
2805
2806 irq_ptr->qdr->qdf0[i+j].slsba=
2807 (unsigned long)(&irq_ptr->output_qs[i]->slsb.acc.val[0]);
2808
2809 irq_ptr->qdr->qdf0[i+j].akey=QDIO_STORAGE_KEY;
2810 irq_ptr->qdr->qdf0[i+j].bkey=QDIO_STORAGE_KEY;
2811 irq_ptr->qdr->qdf0[i+j].ckey=QDIO_STORAGE_KEY;
2812 irq_ptr->qdr->qdf0[i+j].dkey=QDIO_STORAGE_KEY;
2813 }
2814
2815
2816 static inline void
2817 qdio_initialize_set_siga_flags_input(struct qdio_irq *irq_ptr)
2818 {
2819 int i;
2820
2821 for (i=0;i<irq_ptr->no_input_qs;i++) {
2822 irq_ptr->input_qs[i]->siga_sync=
2823 irq_ptr->qdioac&CHSC_FLAG_SIGA_SYNC_NECESSARY;
2824 irq_ptr->input_qs[i]->siga_in=
2825 irq_ptr->qdioac&CHSC_FLAG_SIGA_INPUT_NECESSARY;
2826 irq_ptr->input_qs[i]->siga_out=
2827 irq_ptr->qdioac&CHSC_FLAG_SIGA_OUTPUT_NECESSARY;
2828 irq_ptr->input_qs[i]->siga_sync_done_on_thinints=
2829 irq_ptr->qdioac&CHSC_FLAG_SIGA_SYNC_DONE_ON_THININTS;
2830 irq_ptr->input_qs[i]->hydra_gives_outbound_pcis=
2831 irq_ptr->hydra_gives_outbound_pcis;
2832 irq_ptr->input_qs[i]->siga_sync_done_on_outb_tis=
2833 ((irq_ptr->qdioac&
2834 (CHSC_FLAG_SIGA_SYNC_DONE_ON_OUTB_PCIS|
2835 CHSC_FLAG_SIGA_SYNC_DONE_ON_THININTS))==
2836 (CHSC_FLAG_SIGA_SYNC_DONE_ON_OUTB_PCIS|
2837 CHSC_FLAG_SIGA_SYNC_DONE_ON_THININTS));
2838
2839 }
2840 }
2841
2842 static inline void
2843 qdio_initialize_set_siga_flags_output(struct qdio_irq *irq_ptr)
2844 {
2845 int i;
2846
2847 for (i=0;i<irq_ptr->no_output_qs;i++) {
2848 irq_ptr->output_qs[i]->siga_sync=
2849 irq_ptr->qdioac&CHSC_FLAG_SIGA_SYNC_NECESSARY;
2850 irq_ptr->output_qs[i]->siga_in=
2851 irq_ptr->qdioac&CHSC_FLAG_SIGA_INPUT_NECESSARY;
2852 irq_ptr->output_qs[i]->siga_out=
2853 irq_ptr->qdioac&CHSC_FLAG_SIGA_OUTPUT_NECESSARY;
2854 irq_ptr->output_qs[i]->siga_sync_done_on_thinints=
2855 irq_ptr->qdioac&CHSC_FLAG_SIGA_SYNC_DONE_ON_THININTS;
2856 irq_ptr->output_qs[i]->hydra_gives_outbound_pcis=
2857 irq_ptr->hydra_gives_outbound_pcis;
2858 irq_ptr->output_qs[i]->siga_sync_done_on_outb_tis=
2859 ((irq_ptr->qdioac&
2860 (CHSC_FLAG_SIGA_SYNC_DONE_ON_OUTB_PCIS|
2861 CHSC_FLAG_SIGA_SYNC_DONE_ON_THININTS))==
2862 (CHSC_FLAG_SIGA_SYNC_DONE_ON_OUTB_PCIS|
2863 CHSC_FLAG_SIGA_SYNC_DONE_ON_THININTS));
2864
2865 }
2866 }
2867
2868 static inline int
2869 qdio_establish_irq_check_for_errors(struct ccw_device *cdev, int cstat,
2870 int dstat)
2871 {
2872 char dbf_text[15];
2873 struct qdio_irq *irq_ptr;
2874
2875 irq_ptr = cdev->private->qdio_data;
2876
2877 if (cstat || (dstat & ~(DEV_STAT_CHN_END|DEV_STAT_DEV_END))) {
2878 sprintf(dbf_text,"ick1%4x",irq_ptr->schid.sch_no);
2879 QDIO_DBF_TEXT2(1,trace,dbf_text);
2880 QDIO_DBF_HEX2(0,trace,&dstat,sizeof(int));
2881 QDIO_DBF_HEX2(0,trace,&cstat,sizeof(int));
2882 QDIO_PRINT_ERR("received check condition on establish " \
2883 "queues on irq 0.%x.%x (cs=x%x, ds=x%x).\n",
2884 irq_ptr->schid.ssid, irq_ptr->schid.sch_no,
2885 cstat,dstat);
2886 qdio_set_state(irq_ptr,QDIO_IRQ_STATE_ERR);
2887 }
2888
2889 if (!(dstat & DEV_STAT_DEV_END)) {
2890 QDIO_DBF_TEXT2(1,setup,"eq:no de");
2891 QDIO_DBF_HEX2(0,setup,&dstat, sizeof(dstat));
2892 QDIO_DBF_HEX2(0,setup,&cstat, sizeof(cstat));
2893 QDIO_PRINT_ERR("establish queues on irq 0.%x.%04x: didn't get "
2894 "device end: dstat=%02x, cstat=%02x\n",
2895 irq_ptr->schid.ssid, irq_ptr->schid.sch_no,
2896 dstat, cstat);
2897 qdio_set_state(irq_ptr, QDIO_IRQ_STATE_ERR);
2898 return 1;
2899 }
2900
2901 if (dstat & ~(DEV_STAT_CHN_END|DEV_STAT_DEV_END)) {
2902 QDIO_DBF_TEXT2(1,setup,"eq:badio");
2903 QDIO_DBF_HEX2(0,setup,&dstat, sizeof(dstat));
2904 QDIO_DBF_HEX2(0,setup,&cstat, sizeof(cstat));
2905 QDIO_PRINT_ERR("establish queues on irq 0.%x.%04x: got "
2906 "the following devstat: dstat=%02x, "
2907 "cstat=%02x\n", irq_ptr->schid.ssid,
2908 irq_ptr->schid.sch_no, dstat, cstat);
2909 qdio_set_state(irq_ptr, QDIO_IRQ_STATE_ERR);
2910 return 1;
2911 }
2912 return 0;
2913 }
2914
2915 static void
2916 qdio_establish_handle_irq(struct ccw_device *cdev, int cstat, int dstat)
2917 {
2918 struct qdio_irq *irq_ptr;
2919 char dbf_text[15];
2920
2921 irq_ptr = cdev->private->qdio_data;
2922
2923 sprintf(dbf_text,"qehi%4x",cdev->private->schid.sch_no);
2924 QDIO_DBF_TEXT0(0,setup,dbf_text);
2925 QDIO_DBF_TEXT0(0,trace,dbf_text);
2926
2927 if (qdio_establish_irq_check_for_errors(cdev, cstat, dstat)) {
2928 ccw_device_set_timeout(cdev, 0);
2929 return;
2930 }
2931
2932 qdio_set_state(irq_ptr,QDIO_IRQ_STATE_ESTABLISHED);
2933 ccw_device_set_timeout(cdev, 0);
2934 }
2935
2936 int
2937 qdio_initialize(struct qdio_initialize *init_data)
2938 {
2939 int rc;
2940 char dbf_text[15];
2941
2942 sprintf(dbf_text,"qini%4x",init_data->cdev->private->schid.sch_no);
2943 QDIO_DBF_TEXT0(0,setup,dbf_text);
2944 QDIO_DBF_TEXT0(0,trace,dbf_text);
2945
2946 rc = qdio_allocate(init_data);
2947 if (rc == 0) {
2948 rc = qdio_establish(init_data);
2949 if (rc != 0)
2950 qdio_free(init_data->cdev);
2951 }
2952
2953 return rc;
2954 }
2955
2956
2957 int
2958 qdio_allocate(struct qdio_initialize *init_data)
2959 {
2960 struct qdio_irq *irq_ptr;
2961 char dbf_text[15];
2962
2963 sprintf(dbf_text,"qalc%4x",init_data->cdev->private->schid.sch_no);
2964 QDIO_DBF_TEXT0(0,setup,dbf_text);
2965 QDIO_DBF_TEXT0(0,trace,dbf_text);
2966 if ( (init_data->no_input_qs>QDIO_MAX_QUEUES_PER_IRQ) ||
2967 (init_data->no_output_qs>QDIO_MAX_QUEUES_PER_IRQ) ||
2968 ((init_data->no_input_qs) && (!init_data->input_handler)) ||
2969 ((init_data->no_output_qs) && (!init_data->output_handler)) )
2970 return -EINVAL;
2971
2972 if (!init_data->input_sbal_addr_array)
2973 return -EINVAL;
2974
2975 if (!init_data->output_sbal_addr_array)
2976 return -EINVAL;
2977
2978 qdio_allocate_do_dbf(init_data);
2979
2980 /* create irq */
2981 irq_ptr = (void *) get_zeroed_page(GFP_KERNEL | GFP_DMA);
2982
2983 QDIO_DBF_TEXT0(0,setup,"irq_ptr:");
2984 QDIO_DBF_HEX0(0,setup,&irq_ptr,sizeof(void*));
2985
2986 if (!irq_ptr) {
2987 QDIO_PRINT_ERR("kmalloc of irq_ptr failed!\n");
2988 return -ENOMEM;
2989 }
2990
2991 init_MUTEX(&irq_ptr->setting_up_sema);
2992
2993 /* QDR must be in DMA area since CCW data address is only 32 bit */
2994 irq_ptr->qdr=kmalloc(sizeof(struct qdr), GFP_KERNEL | GFP_DMA);
2995 if (!(irq_ptr->qdr)) {
2996 free_page((unsigned long) irq_ptr);
2997 QDIO_PRINT_ERR("kmalloc of irq_ptr->qdr failed!\n");
2998 return -ENOMEM;
2999 }
3000 QDIO_DBF_TEXT0(0,setup,"qdr:");
3001 QDIO_DBF_HEX0(0,setup,&irq_ptr->qdr,sizeof(void*));
3002
3003 if (qdio_alloc_qs(irq_ptr,
3004 init_data->no_input_qs,
3005 init_data->no_output_qs)) {
3006 qdio_release_irq_memory(irq_ptr);
3007 return -ENOMEM;
3008 }
3009
3010 init_data->cdev->private->qdio_data = irq_ptr;
3011
3012 qdio_set_state(irq_ptr,QDIO_IRQ_STATE_INACTIVE);
3013
3014 return 0;
3015 }
3016
3017 int qdio_fill_irq(struct qdio_initialize *init_data)
3018 {
3019 int i;
3020 char dbf_text[15];
3021 struct ciw *ciw;
3022 int is_iqdio;
3023 struct qdio_irq *irq_ptr;
3024
3025 irq_ptr = init_data->cdev->private->qdio_data;
3026
3027 memset(irq_ptr,0,((char*)&irq_ptr->qdr)-((char*)irq_ptr));
3028
3029 /* wipes qib.ac, required by ar7063 */
3030 memset(irq_ptr->qdr,0,sizeof(struct qdr));
3031
3032 irq_ptr->int_parm=init_data->int_parm;
3033
3034 irq_ptr->schid = ccw_device_get_subchannel_id(init_data->cdev);
3035 irq_ptr->no_input_qs=init_data->no_input_qs;
3036 irq_ptr->no_output_qs=init_data->no_output_qs;
3037
3038 if (init_data->q_format==QDIO_IQDIO_QFMT) {
3039 irq_ptr->is_iqdio_irq=1;
3040 irq_ptr->is_thinint_irq=1;
3041 } else {
3042 irq_ptr->is_iqdio_irq=0;
3043 irq_ptr->is_thinint_irq=hydra_thinints;
3044 }
3045 sprintf(dbf_text,"is_i_t%1x%1x",
3046 irq_ptr->is_iqdio_irq,irq_ptr->is_thinint_irq);
3047 QDIO_DBF_TEXT2(0,setup,dbf_text);
3048
3049 if (irq_ptr->is_thinint_irq) {
3050 irq_ptr->dev_st_chg_ind = qdio_get_indicator();
3051 QDIO_DBF_HEX1(0,setup,&irq_ptr->dev_st_chg_ind,sizeof(void*));
3052 if (!irq_ptr->dev_st_chg_ind) {
3053 QDIO_PRINT_WARN("no indicator location available " \
3054 "for irq 0.%x.%x\n",
3055 irq_ptr->schid.ssid, irq_ptr->schid.sch_no);
3056 qdio_release_irq_memory(irq_ptr);
3057 return -ENOBUFS;
3058 }
3059 }
3060
3061 /* defaults */
3062 irq_ptr->equeue.cmd=DEFAULT_ESTABLISH_QS_CMD;
3063 irq_ptr->equeue.count=DEFAULT_ESTABLISH_QS_COUNT;
3064 irq_ptr->aqueue.cmd=DEFAULT_ACTIVATE_QS_CMD;
3065 irq_ptr->aqueue.count=DEFAULT_ACTIVATE_QS_COUNT;
3066
3067 qdio_fill_qs(irq_ptr, init_data->cdev,
3068 init_data->no_input_qs,
3069 init_data->no_output_qs,
3070 init_data->input_handler,
3071 init_data->output_handler,init_data->int_parm,
3072 init_data->q_format,init_data->flags,
3073 init_data->input_sbal_addr_array,
3074 init_data->output_sbal_addr_array);
3075
3076 if (!try_module_get(THIS_MODULE)) {
3077 QDIO_PRINT_CRIT("try_module_get() failed!\n");
3078 qdio_release_irq_memory(irq_ptr);
3079 return -EINVAL;
3080 }
3081
3082 qdio_fill_thresholds(irq_ptr,init_data->no_input_qs,
3083 init_data->no_output_qs,
3084 init_data->min_input_threshold,
3085 init_data->max_input_threshold,
3086 init_data->min_output_threshold,
3087 init_data->max_output_threshold);
3088
3089 /* fill in qdr */
3090 irq_ptr->qdr->qfmt=init_data->q_format;
3091 irq_ptr->qdr->iqdcnt=init_data->no_input_qs;
3092 irq_ptr->qdr->oqdcnt=init_data->no_output_qs;
3093 irq_ptr->qdr->iqdsz=sizeof(struct qdesfmt0)/4; /* size in words */
3094 irq_ptr->qdr->oqdsz=sizeof(struct qdesfmt0)/4;
3095
3096 irq_ptr->qdr->qiba=(unsigned long)&irq_ptr->qib;
3097 irq_ptr->qdr->qkey=QDIO_STORAGE_KEY;
3098
3099 /* fill in qib */
3100 irq_ptr->is_qebsm = is_passthrough;
3101 if (irq_ptr->is_qebsm)
3102 irq_ptr->qib.rflags |= QIB_RFLAGS_ENABLE_QEBSM;
3103
3104 irq_ptr->qib.qfmt=init_data->q_format;
3105 if (init_data->no_input_qs)
3106 irq_ptr->qib.isliba=(unsigned long)(irq_ptr->input_qs[0]->slib);
3107 if (init_data->no_output_qs)
3108 irq_ptr->qib.osliba=(unsigned long)(irq_ptr->output_qs[0]->slib);
3109 memcpy(irq_ptr->qib.ebcnam,init_data->adapter_name,8);
3110
3111 qdio_set_impl_params(irq_ptr,init_data->qib_param_field_format,
3112 init_data->qib_param_field,
3113 init_data->no_input_qs,
3114 init_data->no_output_qs,
3115 init_data->input_slib_elements,
3116 init_data->output_slib_elements);
3117
3118 /* first input descriptors, then output descriptors */
3119 is_iqdio = (init_data->q_format == QDIO_IQDIO_QFMT) ? 1 : 0;
3120 for (i=0;i<init_data->no_input_qs;i++)
3121 qdio_allocate_fill_input_desc(irq_ptr, i, is_iqdio);
3122
3123 for (i=0;i<init_data->no_output_qs;i++)
3124 qdio_allocate_fill_output_desc(irq_ptr, i,
3125 init_data->no_input_qs,
3126 is_iqdio);
3127
3128 /* qdr, qib, sls, slsbs, slibs, sbales filled. */
3129
3130 /* get qdio commands */
3131 ciw = ccw_device_get_ciw(init_data->cdev, CIW_TYPE_EQUEUE);
3132 if (!ciw) {
3133 QDIO_DBF_TEXT2(1,setup,"no eq");
3134 QDIO_PRINT_INFO("No equeue CIW found for QDIO commands. "
3135 "Trying to use default.\n");
3136 } else
3137 irq_ptr->equeue = *ciw;
3138 ciw = ccw_device_get_ciw(init_data->cdev, CIW_TYPE_AQUEUE);
3139 if (!ciw) {
3140 QDIO_DBF_TEXT2(1,setup,"no aq");
3141 QDIO_PRINT_INFO("No aqueue CIW found for QDIO commands. "
3142 "Trying to use default.\n");
3143 } else
3144 irq_ptr->aqueue = *ciw;
3145
3146 /* Set new interrupt handler. */
3147 irq_ptr->original_int_handler = init_data->cdev->handler;
3148 init_data->cdev->handler = qdio_handler;
3149
3150 return 0;
3151 }
3152
3153 int
3154 qdio_establish(struct qdio_initialize *init_data)
3155 {
3156 struct qdio_irq *irq_ptr;
3157 unsigned long saveflags;
3158 int result, result2;
3159 struct ccw_device *cdev;
3160 char dbf_text[20];
3161
3162 cdev=init_data->cdev;
3163 irq_ptr = cdev->private->qdio_data;
3164 if (!irq_ptr)
3165 return -EINVAL;
3166
3167 if (cdev->private->state != DEV_STATE_ONLINE)
3168 return -EINVAL;
3169
3170 down(&irq_ptr->setting_up_sema);
3171
3172 qdio_fill_irq(init_data);
3173
3174 /* the thinint CHSC stuff */
3175 if (irq_ptr->is_thinint_irq) {
3176
3177 result = tiqdio_set_subchannel_ind(irq_ptr,0);
3178 if (result) {
3179 up(&irq_ptr->setting_up_sema);
3180 qdio_shutdown(cdev, QDIO_FLAG_CLEANUP_USING_CLEAR);
3181 return result;
3182 }
3183 tiqdio_set_delay_target(irq_ptr,TIQDIO_DELAY_TARGET);
3184 }
3185
3186 sprintf(dbf_text,"qest%4x",cdev->private->schid.sch_no);
3187 QDIO_DBF_TEXT0(0,setup,dbf_text);
3188 QDIO_DBF_TEXT0(0,trace,dbf_text);
3189
3190 /* establish q */
3191 irq_ptr->ccw.cmd_code=irq_ptr->equeue.cmd;
3192 irq_ptr->ccw.flags=CCW_FLAG_SLI;
3193 irq_ptr->ccw.count=irq_ptr->equeue.count;
3194 irq_ptr->ccw.cda=QDIO_GET_ADDR(irq_ptr->qdr);
3195
3196 spin_lock_irqsave(get_ccwdev_lock(cdev),saveflags);
3197
3198 ccw_device_set_options(cdev, 0);
3199 result=ccw_device_start_timeout(cdev,&irq_ptr->ccw,
3200 QDIO_DOING_ESTABLISH,0, 0,
3201 QDIO_ESTABLISH_TIMEOUT);
3202 if (result) {
3203 result2=ccw_device_start_timeout(cdev,&irq_ptr->ccw,
3204 QDIO_DOING_ESTABLISH,0,0,
3205 QDIO_ESTABLISH_TIMEOUT);
3206 sprintf(dbf_text,"eq:io%4x",result);
3207 QDIO_DBF_TEXT2(1,setup,dbf_text);
3208 if (result2) {
3209 sprintf(dbf_text,"eq:io%4x",result);
3210 QDIO_DBF_TEXT2(1,setup,dbf_text);
3211 }
3212 QDIO_PRINT_WARN("establish queues on irq 0.%x.%04x: do_IO " \
3213 "returned %i, next try returned %i\n",
3214 irq_ptr->schid.ssid, irq_ptr->schid.sch_no,
3215 result, result2);
3216 result=result2;
3217 if (result)
3218 ccw_device_set_timeout(cdev, 0);
3219 }
3220
3221 spin_unlock_irqrestore(get_ccwdev_lock(cdev),saveflags);
3222
3223 if (result) {
3224 up(&irq_ptr->setting_up_sema);
3225 qdio_shutdown(cdev,QDIO_FLAG_CLEANUP_USING_CLEAR);
3226 return result;
3227 }
3228
3229 /* Timeout is cared for already by using ccw_device_start_timeout(). */
3230 wait_event_interruptible(cdev->private->wait_q,
3231 irq_ptr->state == QDIO_IRQ_STATE_ESTABLISHED ||
3232 irq_ptr->state == QDIO_IRQ_STATE_ERR);
3233
3234 if (irq_ptr->state == QDIO_IRQ_STATE_ESTABLISHED)
3235 result = 0;
3236 else {
3237 up(&irq_ptr->setting_up_sema);
3238 qdio_shutdown(cdev, QDIO_FLAG_CLEANUP_USING_CLEAR);
3239 return -EIO;
3240 }
3241
3242 qdio_get_ssqd_information(irq_ptr);
3243 /* if this gets set once, we're running under VM and can omit SVSes */
3244 if (irq_ptr->qdioac&CHSC_FLAG_SIGA_SYNC_NECESSARY)
3245 omit_svs=1;
3246
3247 sprintf(dbf_text,"qdioac%2x",irq_ptr->qdioac);
3248 QDIO_DBF_TEXT2(0,setup,dbf_text);
3249
3250 sprintf(dbf_text,"qib ac%2x",irq_ptr->qib.ac);
3251 QDIO_DBF_TEXT2(0,setup,dbf_text);
3252
3253 irq_ptr->hydra_gives_outbound_pcis=
3254 irq_ptr->qib.ac&QIB_AC_OUTBOUND_PCI_SUPPORTED;
3255 irq_ptr->sync_done_on_outb_pcis=
3256 irq_ptr->qdioac&CHSC_FLAG_SIGA_SYNC_DONE_ON_OUTB_PCIS;
3257
3258 qdio_initialize_set_siga_flags_input(irq_ptr);
3259 qdio_initialize_set_siga_flags_output(irq_ptr);
3260
3261 up(&irq_ptr->setting_up_sema);
3262
3263 return result;
3264
3265 }
3266
3267 int
3268 qdio_activate(struct ccw_device *cdev, int flags)
3269 {
3270 struct qdio_irq *irq_ptr;
3271 int i,result=0,result2;
3272 unsigned long saveflags;
3273 char dbf_text[20]; /* see qdio_initialize */
3274
3275 irq_ptr = cdev->private->qdio_data;
3276 if (!irq_ptr)
3277 return -ENODEV;
3278
3279 if (cdev->private->state != DEV_STATE_ONLINE)
3280 return -EINVAL;
3281
3282 down(&irq_ptr->setting_up_sema);
3283 if (irq_ptr->state==QDIO_IRQ_STATE_INACTIVE) {
3284 result=-EBUSY;
3285 goto out;
3286 }
3287
3288 sprintf(dbf_text,"qact%4x", irq_ptr->schid.sch_no);
3289 QDIO_DBF_TEXT2(0,setup,dbf_text);
3290 QDIO_DBF_TEXT2(0,trace,dbf_text);
3291
3292 /* activate q */
3293 irq_ptr->ccw.cmd_code=irq_ptr->aqueue.cmd;
3294 irq_ptr->ccw.flags=CCW_FLAG_SLI;
3295 irq_ptr->ccw.count=irq_ptr->aqueue.count;
3296 irq_ptr->ccw.cda=QDIO_GET_ADDR(0);
3297
3298 spin_lock_irqsave(get_ccwdev_lock(cdev),saveflags);
3299
3300 ccw_device_set_timeout(cdev, 0);
3301 ccw_device_set_options(cdev, CCWDEV_REPORT_ALL);
3302 result=ccw_device_start(cdev,&irq_ptr->ccw,QDIO_DOING_ACTIVATE,
3303 0, DOIO_DENY_PREFETCH);
3304 if (result) {
3305 result2=ccw_device_start(cdev,&irq_ptr->ccw,
3306 QDIO_DOING_ACTIVATE,0,0);
3307 sprintf(dbf_text,"aq:io%4x",result);
3308 QDIO_DBF_TEXT2(1,setup,dbf_text);
3309 if (result2) {
3310 sprintf(dbf_text,"aq:io%4x",result);
3311 QDIO_DBF_TEXT2(1,setup,dbf_text);
3312 }
3313 QDIO_PRINT_WARN("activate queues on irq 0.%x.%04x: do_IO " \
3314 "returned %i, next try returned %i\n",
3315 irq_ptr->schid.ssid, irq_ptr->schid.sch_no,
3316 result, result2);
3317 result=result2;
3318 }
3319
3320 spin_unlock_irqrestore(get_ccwdev_lock(cdev),saveflags);
3321 if (result)
3322 goto out;
3323
3324 for (i=0;i<irq_ptr->no_input_qs;i++) {
3325 if (irq_ptr->is_thinint_irq) {
3326 /*
3327 * that way we know, that, if we will get interrupted
3328 * by tiqdio_inbound_processing, qdio_unmark_q will
3329 * not be called
3330 */
3331 qdio_reserve_q(irq_ptr->input_qs[i]);
3332 qdio_mark_tiq(irq_ptr->input_qs[i]);
3333 qdio_release_q(irq_ptr->input_qs[i]);
3334 }
3335 }
3336
3337 if (flags&QDIO_FLAG_NO_INPUT_INTERRUPT_CONTEXT) {
3338 for (i=0;i<irq_ptr->no_input_qs;i++) {
3339 irq_ptr->input_qs[i]->is_input_q|=
3340 QDIO_FLAG_NO_INPUT_INTERRUPT_CONTEXT;
3341 }
3342 }
3343
3344 wait_event_interruptible_timeout(cdev->private->wait_q,
3345 ((irq_ptr->state ==
3346 QDIO_IRQ_STATE_STOPPED) ||
3347 (irq_ptr->state ==
3348 QDIO_IRQ_STATE_ERR)),
3349 QDIO_ACTIVATE_TIMEOUT);
3350
3351 switch (irq_ptr->state) {
3352 case QDIO_IRQ_STATE_STOPPED:
3353 case QDIO_IRQ_STATE_ERR:
3354 up(&irq_ptr->setting_up_sema);
3355 qdio_shutdown(cdev, QDIO_FLAG_CLEANUP_USING_CLEAR);
3356 down(&irq_ptr->setting_up_sema);
3357 result = -EIO;
3358 break;
3359 default:
3360 qdio_set_state(irq_ptr, QDIO_IRQ_STATE_ACTIVE);
3361 result = 0;
3362 }
3363 out:
3364 up(&irq_ptr->setting_up_sema);
3365
3366 return result;
3367 }
3368
3369 /* buffers filled forwards again to make Rick happy */
3370 static inline void
3371 qdio_do_qdio_fill_input(struct qdio_q *q, unsigned int qidx,
3372 unsigned int count, struct qdio_buffer *buffers)
3373 {
3374 struct qdio_irq *irq = (struct qdio_irq *) q->irq_ptr;
3375 qidx &= (QDIO_MAX_BUFFERS_PER_Q - 1);
3376 if (irq->is_qebsm) {
3377 while (count)
3378 set_slsb(q, &qidx, SLSB_CU_INPUT_EMPTY, &count);
3379 return;
3380 }
3381 for (;;) {
3382 set_slsb(q, &qidx, SLSB_CU_INPUT_EMPTY, &count);
3383 count--;
3384 if (!count) break;
3385 qidx = (qidx + 1) & (QDIO_MAX_BUFFERS_PER_Q - 1);
3386 }
3387 }
3388
3389 static inline void
3390 qdio_do_qdio_fill_output(struct qdio_q *q, unsigned int qidx,
3391 unsigned int count, struct qdio_buffer *buffers)
3392 {
3393 struct qdio_irq *irq = (struct qdio_irq *) q->irq_ptr;
3394
3395 qidx &= (QDIO_MAX_BUFFERS_PER_Q - 1);
3396 if (irq->is_qebsm) {
3397 while (count)
3398 set_slsb(q, &qidx, SLSB_CU_OUTPUT_PRIMED, &count);
3399 return;
3400 }
3401
3402 for (;;) {
3403 set_slsb(q, &qidx, SLSB_CU_OUTPUT_PRIMED, &count);
3404 count--;
3405 if (!count) break;
3406 qidx = (qidx + 1) & (QDIO_MAX_BUFFERS_PER_Q - 1);
3407 }
3408 }
3409
3410 static inline void
3411 do_qdio_handle_inbound(struct qdio_q *q, unsigned int callflags,
3412 unsigned int qidx, unsigned int count,
3413 struct qdio_buffer *buffers)
3414 {
3415 int used_elements;
3416
3417 /* This is the inbound handling of queues */
3418 used_elements=atomic_add_return(count, &q->number_of_buffers_used) - count;
3419
3420 qdio_do_qdio_fill_input(q,qidx,count,buffers);
3421
3422 if ((used_elements+count==QDIO_MAX_BUFFERS_PER_Q)&&
3423 (callflags&QDIO_FLAG_UNDER_INTERRUPT))
3424 atomic_xchg(&q->polling,0);
3425
3426 if (used_elements)
3427 return;
3428 if (callflags&QDIO_FLAG_DONT_SIGA)
3429 return;
3430 if (q->siga_in) {
3431 int result;
3432
3433 result=qdio_siga_input(q);
3434 if (result) {
3435 if (q->siga_error)
3436 q->error_status_flags|=
3437 QDIO_STATUS_MORE_THAN_ONE_SIGA_ERROR;
3438 q->error_status_flags|=QDIO_STATUS_LOOK_FOR_ERROR;
3439 q->siga_error=result;
3440 }
3441 }
3442
3443 qdio_mark_q(q);
3444 }
3445
3446 static inline void
3447 do_qdio_handle_outbound(struct qdio_q *q, unsigned int callflags,
3448 unsigned int qidx, unsigned int count,
3449 struct qdio_buffer *buffers)
3450 {
3451 int used_elements;
3452 unsigned int cnt, start_buf;
3453 unsigned char state = 0;
3454 struct qdio_irq *irq = (struct qdio_irq *) q->irq_ptr;
3455
3456 /* This is the outbound handling of queues */
3457 if (qdio_performance_stats)
3458 perf_stats.start_time_outbound=NOW;
3459
3460 qdio_do_qdio_fill_output(q,qidx,count,buffers);
3461
3462 used_elements=atomic_add_return(count, &q->number_of_buffers_used) - count;
3463
3464 if (callflags&QDIO_FLAG_DONT_SIGA) {
3465 if (qdio_performance_stats) {
3466 perf_stats.outbound_time+=NOW-perf_stats.start_time_outbound;
3467 perf_stats.outbound_cnt++;
3468 }
3469 return;
3470 }
3471 if (q->is_iqdio_q) {
3472 /* one siga for every sbal */
3473 while (count--)
3474 qdio_kick_outbound_q(q);
3475
3476 __qdio_outbound_processing(q);
3477 } else {
3478 /* under VM, we do a SIGA sync unconditionally */
3479 SYNC_MEMORY;
3480 else {
3481 /*
3482 * w/o shadow queues (else branch of
3483 * SYNC_MEMORY :-/ ), we try to
3484 * fast-requeue buffers
3485 */
3486 if (irq->is_qebsm) {
3487 cnt = 1;
3488 start_buf = ((qidx+QDIO_MAX_BUFFERS_PER_Q-1) &
3489 (QDIO_MAX_BUFFERS_PER_Q-1));
3490 qdio_do_eqbs(q, &state, &start_buf, &cnt);
3491 } else
3492 state = q->slsb.acc.val[(qidx+QDIO_MAX_BUFFERS_PER_Q-1)
3493 &(QDIO_MAX_BUFFERS_PER_Q-1) ];
3494 if (state != SLSB_CU_OUTPUT_PRIMED) {
3495 qdio_kick_outbound_q(q);
3496 } else {
3497 QDIO_DBF_TEXT3(0,trace, "fast-req");
3498 if (qdio_performance_stats)
3499 perf_stats.fast_reqs++;
3500 }
3501 }
3502 /*
3503 * only marking the q could take too long,
3504 * the upper layer module could do a lot of
3505 * traffic in that time
3506 */
3507 __qdio_outbound_processing(q);
3508 }
3509
3510 if (qdio_performance_stats) {
3511 perf_stats.outbound_time+=NOW-perf_stats.start_time_outbound;
3512 perf_stats.outbound_cnt++;
3513 }
3514 }
3515
3516 /* count must be 1 in iqdio */
3517 int
3518 do_QDIO(struct ccw_device *cdev,unsigned int callflags,
3519 unsigned int queue_number, unsigned int qidx,
3520 unsigned int count,struct qdio_buffer *buffers)
3521 {
3522 struct qdio_irq *irq_ptr;
3523 #ifdef CONFIG_QDIO_DEBUG
3524 char dbf_text[20];
3525
3526 sprintf(dbf_text,"doQD%04x",cdev->private->schid.sch_no);
3527 QDIO_DBF_TEXT3(0,trace,dbf_text);
3528 #endif /* CONFIG_QDIO_DEBUG */
3529
3530 if ( (qidx>QDIO_MAX_BUFFERS_PER_Q) ||
3531 (count>QDIO_MAX_BUFFERS_PER_Q) ||
3532 (queue_number>QDIO_MAX_QUEUES_PER_IRQ) )
3533 return -EINVAL;
3534
3535 if (count==0)
3536 return 0;
3537
3538 irq_ptr = cdev->private->qdio_data;
3539 if (!irq_ptr)
3540 return -ENODEV;
3541
3542 #ifdef CONFIG_QDIO_DEBUG
3543 if (callflags&QDIO_FLAG_SYNC_INPUT)
3544 QDIO_DBF_HEX3(0,trace,&irq_ptr->input_qs[queue_number],
3545 sizeof(void*));
3546 else
3547 QDIO_DBF_HEX3(0,trace,&irq_ptr->output_qs[queue_number],
3548 sizeof(void*));
3549 sprintf(dbf_text,"flag%04x",callflags);
3550 QDIO_DBF_TEXT3(0,trace,dbf_text);
3551 sprintf(dbf_text,"qi%02xct%02x",qidx,count);
3552 QDIO_DBF_TEXT3(0,trace,dbf_text);
3553 #endif /* CONFIG_QDIO_DEBUG */
3554
3555 if (irq_ptr->state!=QDIO_IRQ_STATE_ACTIVE)
3556 return -EBUSY;
3557
3558 if (callflags&QDIO_FLAG_SYNC_INPUT)
3559 do_qdio_handle_inbound(irq_ptr->input_qs[queue_number],
3560 callflags, qidx, count, buffers);
3561 else if (callflags&QDIO_FLAG_SYNC_OUTPUT)
3562 do_qdio_handle_outbound(irq_ptr->output_qs[queue_number],
3563 callflags, qidx, count, buffers);
3564 else {
3565 QDIO_DBF_TEXT3(1,trace,"doQD:inv");
3566 return -EINVAL;
3567 }
3568 return 0;
3569 }
3570
3571 static int
3572 qdio_perf_procfile_read(char *buffer, char **buffer_location, off_t offset,
3573 int buffer_length, int *eof, void *data)
3574 {
3575 int c=0;
3576
3577 /* we are always called with buffer_length=4k, so we all
3578 deliver on the first read */
3579 if (offset>0)
3580 return 0;
3581
3582 #define _OUTP_IT(x...) c+=sprintf(buffer+c,x)
3583 _OUTP_IT("i_p_nc/c=%lu/%lu\n",i_p_nc,i_p_c);
3584 _OUTP_IT("ii_p_nc/c=%lu/%lu\n",ii_p_nc,ii_p_c);
3585 _OUTP_IT("o_p_nc/c=%lu/%lu\n",o_p_nc,o_p_c);
3586 _OUTP_IT("Number of tasklet runs (total) : %lu\n",
3587 perf_stats.tl_runs);
3588 _OUTP_IT("\n");
3589 _OUTP_IT("Number of SIGA sync's issued : %lu\n",
3590 perf_stats.siga_syncs);
3591 _OUTP_IT("Number of SIGA in's issued : %lu\n",
3592 perf_stats.siga_ins);
3593 _OUTP_IT("Number of SIGA out's issued : %lu\n",
3594 perf_stats.siga_outs);
3595 _OUTP_IT("Number of PCIs caught : %lu\n",
3596 perf_stats.pcis);
3597 _OUTP_IT("Number of adapter interrupts caught : %lu\n",
3598 perf_stats.thinints);
3599 _OUTP_IT("Number of fast requeues (outg. SBALs w/o SIGA) : %lu\n",
3600 perf_stats.fast_reqs);
3601 _OUTP_IT("\n");
3602 _OUTP_IT("Total time of all inbound actions (us) incl. UL : %lu\n",
3603 perf_stats.inbound_time);
3604 _OUTP_IT("Number of inbound transfers : %lu\n",
3605 perf_stats.inbound_cnt);
3606 _OUTP_IT("Total time of all outbound do_QDIOs (us) : %lu\n",
3607 perf_stats.outbound_time);
3608 _OUTP_IT("Number of do_QDIOs outbound : %lu\n",
3609 perf_stats.outbound_cnt);
3610 _OUTP_IT("\n");
3611
3612 return c;
3613 }
3614
3615 static struct proc_dir_entry *qdio_perf_proc_file;
3616
3617 static void
3618 qdio_add_procfs_entry(void)
3619 {
3620 proc_perf_file_registration=0;
3621 qdio_perf_proc_file=create_proc_entry(QDIO_PERF,
3622 S_IFREG|0444,&proc_root);
3623 if (qdio_perf_proc_file) {
3624 qdio_perf_proc_file->read_proc=&qdio_perf_procfile_read;
3625 } else proc_perf_file_registration=-1;
3626
3627 if (proc_perf_file_registration)
3628 QDIO_PRINT_WARN("was not able to register perf. " \
3629 "proc-file (%i).\n",
3630 proc_perf_file_registration);
3631 }
3632
3633 static void
3634 qdio_remove_procfs_entry(void)
3635 {
3636 perf_stats.tl_runs=0;
3637
3638 if (!proc_perf_file_registration) /* means if it went ok earlier */
3639 remove_proc_entry(QDIO_PERF,&proc_root);
3640 }
3641
3642 /**
3643 * attributes in sysfs
3644 *****************************************************************************/
3645
3646 static ssize_t
3647 qdio_performance_stats_show(struct bus_type *bus, char *buf)
3648 {
3649 return sprintf(buf, "%i\n", qdio_performance_stats ? 1 : 0);
3650 }
3651
3652 static ssize_t
3653 qdio_performance_stats_store(struct bus_type *bus, const char *buf, size_t count)
3654 {
3655 char *tmp;
3656 int i;
3657
3658 i = simple_strtoul(buf, &tmp, 16);
3659 if ((i == 0) || (i == 1)) {
3660 if (i == qdio_performance_stats)
3661 return count;
3662 qdio_performance_stats = i;
3663 if (i==0) {
3664 /* reset perf. stat. info */
3665 i_p_nc = 0;
3666 i_p_c = 0;
3667 ii_p_nc = 0;
3668 ii_p_c = 0;
3669 o_p_nc = 0;
3670 o_p_c = 0;
3671 memset(&perf_stats, 0, sizeof(struct qdio_perf_stats));
3672 }
3673 } else {
3674 QDIO_PRINT_WARN("QDIO performance_stats: write 0 or 1 to this file!\n");
3675 return -EINVAL;
3676 }
3677 return count;
3678 }
3679
3680 static BUS_ATTR(qdio_performance_stats, 0644, qdio_performance_stats_show,
3681 qdio_performance_stats_store);
3682
3683 static void
3684 tiqdio_register_thinints(void)
3685 {
3686 char dbf_text[20];
3687 register_thinint_result=
3688 s390_register_adapter_interrupt(&tiqdio_thinint_handler);
3689 if (register_thinint_result) {
3690 sprintf(dbf_text,"regthn%x",(register_thinint_result&0xff));
3691 QDIO_DBF_TEXT0(0,setup,dbf_text);
3692 QDIO_PRINT_ERR("failed to register adapter handler " \
3693 "(rc=%i).\nAdapter interrupts might " \
3694 "not work. Continuing.\n",
3695 register_thinint_result);
3696 }
3697 }
3698
3699 static void
3700 tiqdio_unregister_thinints(void)
3701 {
3702 if (!register_thinint_result)
3703 s390_unregister_adapter_interrupt(&tiqdio_thinint_handler);
3704 }
3705
3706 static int
3707 qdio_get_qdio_memory(void)
3708 {
3709 int i;
3710 indicator_used[0]=1;
3711
3712 for (i=1;i<INDICATORS_PER_CACHELINE;i++)
3713 indicator_used[i]=0;
3714 indicators = kzalloc(sizeof(__u32)*(INDICATORS_PER_CACHELINE),
3715 GFP_KERNEL);
3716 if (!indicators)
3717 return -ENOMEM;
3718 return 0;
3719 }
3720
3721 static void
3722 qdio_release_qdio_memory(void)
3723 {
3724 kfree(indicators);
3725 }
3726
3727
3728 static void
3729 qdio_unregister_dbf_views(void)
3730 {
3731 if (qdio_dbf_setup)
3732 debug_unregister(qdio_dbf_setup);
3733 if (qdio_dbf_sbal)
3734 debug_unregister(qdio_dbf_sbal);
3735 if (qdio_dbf_sense)
3736 debug_unregister(qdio_dbf_sense);
3737 if (qdio_dbf_trace)
3738 debug_unregister(qdio_dbf_trace);
3739 #ifdef CONFIG_QDIO_DEBUG
3740 if (qdio_dbf_slsb_out)
3741 debug_unregister(qdio_dbf_slsb_out);
3742 if (qdio_dbf_slsb_in)
3743 debug_unregister(qdio_dbf_slsb_in);
3744 #endif /* CONFIG_QDIO_DEBUG */
3745 }
3746
3747 static int
3748 qdio_register_dbf_views(void)
3749 {
3750 qdio_dbf_setup=debug_register(QDIO_DBF_SETUP_NAME,
3751 QDIO_DBF_SETUP_PAGES,
3752 QDIO_DBF_SETUP_NR_AREAS,
3753 QDIO_DBF_SETUP_LEN);
3754 if (!qdio_dbf_setup)
3755 goto oom;
3756 debug_register_view(qdio_dbf_setup,&debug_hex_ascii_view);
3757 debug_set_level(qdio_dbf_setup,QDIO_DBF_SETUP_LEVEL);
3758
3759 qdio_dbf_sbal=debug_register(QDIO_DBF_SBAL_NAME,
3760 QDIO_DBF_SBAL_PAGES,
3761 QDIO_DBF_SBAL_NR_AREAS,
3762 QDIO_DBF_SBAL_LEN);
3763 if (!qdio_dbf_sbal)
3764 goto oom;
3765
3766 debug_register_view(qdio_dbf_sbal,&debug_hex_ascii_view);
3767 debug_set_level(qdio_dbf_sbal,QDIO_DBF_SBAL_LEVEL);
3768
3769 qdio_dbf_sense=debug_register(QDIO_DBF_SENSE_NAME,
3770 QDIO_DBF_SENSE_PAGES,
3771 QDIO_DBF_SENSE_NR_AREAS,
3772 QDIO_DBF_SENSE_LEN);
3773 if (!qdio_dbf_sense)
3774 goto oom;
3775
3776 debug_register_view(qdio_dbf_sense,&debug_hex_ascii_view);
3777 debug_set_level(qdio_dbf_sense,QDIO_DBF_SENSE_LEVEL);
3778
3779 qdio_dbf_trace=debug_register(QDIO_DBF_TRACE_NAME,
3780 QDIO_DBF_TRACE_PAGES,
3781 QDIO_DBF_TRACE_NR_AREAS,
3782 QDIO_DBF_TRACE_LEN);
3783 if (!qdio_dbf_trace)
3784 goto oom;
3785
3786 debug_register_view(qdio_dbf_trace,&debug_hex_ascii_view);
3787 debug_set_level(qdio_dbf_trace,QDIO_DBF_TRACE_LEVEL);
3788
3789 #ifdef CONFIG_QDIO_DEBUG
3790 qdio_dbf_slsb_out=debug_register(QDIO_DBF_SLSB_OUT_NAME,
3791 QDIO_DBF_SLSB_OUT_PAGES,
3792 QDIO_DBF_SLSB_OUT_NR_AREAS,
3793 QDIO_DBF_SLSB_OUT_LEN);
3794 if (!qdio_dbf_slsb_out)
3795 goto oom;
3796 debug_register_view(qdio_dbf_slsb_out,&debug_hex_ascii_view);
3797 debug_set_level(qdio_dbf_slsb_out,QDIO_DBF_SLSB_OUT_LEVEL);
3798
3799 qdio_dbf_slsb_in=debug_register(QDIO_DBF_SLSB_IN_NAME,
3800 QDIO_DBF_SLSB_IN_PAGES,
3801 QDIO_DBF_SLSB_IN_NR_AREAS,
3802 QDIO_DBF_SLSB_IN_LEN);
3803 if (!qdio_dbf_slsb_in)
3804 goto oom;
3805 debug_register_view(qdio_dbf_slsb_in,&debug_hex_ascii_view);
3806 debug_set_level(qdio_dbf_slsb_in,QDIO_DBF_SLSB_IN_LEVEL);
3807 #endif /* CONFIG_QDIO_DEBUG */
3808 return 0;
3809 oom:
3810 QDIO_PRINT_ERR("not enough memory for dbf.\n");
3811 qdio_unregister_dbf_views();
3812 return -ENOMEM;
3813 }
3814
3815 static void *qdio_mempool_alloc(gfp_t gfp_mask, void *size)
3816 {
3817 return (void *) get_zeroed_page(gfp_mask|GFP_DMA);
3818 }
3819
3820 static void qdio_mempool_free(void *element, void *size)
3821 {
3822 free_page((unsigned long) element);
3823 }
3824
3825 static int __init
3826 init_QDIO(void)
3827 {
3828 int res;
3829 void *ptr;
3830
3831 printk("qdio: loading %s\n",version);
3832
3833 res=qdio_get_qdio_memory();
3834 if (res)
3835 return res;
3836
3837 res = qdio_register_dbf_views();
3838 if (res)
3839 return res;
3840
3841 QDIO_DBF_TEXT0(0,setup,"initQDIO");
3842 res = bus_create_file(&ccw_bus_type, &bus_attr_qdio_performance_stats);
3843
3844 memset((void*)&perf_stats,0,sizeof(perf_stats));
3845 QDIO_DBF_TEXT0(0,setup,"perfstat");
3846 ptr=&perf_stats;
3847 QDIO_DBF_HEX0(0,setup,&ptr,sizeof(void*));
3848
3849 qdio_add_procfs_entry();
3850
3851 qdio_mempool_scssc = mempool_create(QDIO_MEMPOOL_SCSSC_ELEMENTS,
3852 qdio_mempool_alloc,
3853 qdio_mempool_free, NULL);
3854
3855 if (tiqdio_check_chsc_availability())
3856 QDIO_PRINT_ERR("Not all CHSCs supported. Continuing.\n");
3857
3858 tiqdio_register_thinints();
3859
3860 return 0;
3861 }
3862
3863 static void __exit
3864 cleanup_QDIO(void)
3865 {
3866 tiqdio_unregister_thinints();
3867 qdio_remove_procfs_entry();
3868 qdio_release_qdio_memory();
3869 qdio_unregister_dbf_views();
3870 mempool_destroy(qdio_mempool_scssc);
3871 bus_remove_file(&ccw_bus_type, &bus_attr_qdio_performance_stats);
3872 printk("qdio: %s: module removed\n",version);
3873 }
3874
3875 module_init(init_QDIO);
3876 module_exit(cleanup_QDIO);
3877
3878 EXPORT_SYMBOL(qdio_allocate);
3879 EXPORT_SYMBOL(qdio_establish);
3880 EXPORT_SYMBOL(qdio_initialize);
3881 EXPORT_SYMBOL(qdio_activate);
3882 EXPORT_SYMBOL(do_QDIO);
3883 EXPORT_SYMBOL(qdio_shutdown);
3884 EXPORT_SYMBOL(qdio_free);
3885 EXPORT_SYMBOL(qdio_cleanup);
3886 EXPORT_SYMBOL(qdio_synchronize);
Linux kernel - Deliverables
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