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[S390] Export uaccess as non-gpl symbol.
[linux-block.git] / drivers / s390 / cio / qdio.c
CommitLineData
1da177e4
LT		 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>
4ce3b30c 10 * 2.6 cio integration by Cornelia Huck <cornelia.huck@de.ibm.com>
1da177e4
LT		 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
1da177e4
LT		 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>
a3ae39c0 40#include <linux/mempool.h>
1da177e4
LT		 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>
34249d0f 49#include <asm/s390_rdev.h>
1da177e4
LT		 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
1da177e4
LT		 60/****************** MODULE PARAMETER VARIABLES ********************/
61MODULE_AUTHOR("Utz Bacher <utz.bacher@de.ibm.com>");
62MODULE_DESCRIPTION("QDIO base support version 2, " \
63 "Copyright 2000 IBM Corporation");
64MODULE_LICENSE("GPL");
65
66/******************** HERE WE GO ***********************************/
67
e018ba1f 68static const char version[] = "QDIO base support version 2";
1da177e4 69
34249d0f 70static int qdio_performance_stats = 0;
1da177e4
LT		 71static int proc_perf_file_registration;
72static unsigned long i_p_c, i_p_nc, o_p_c, o_p_nc, ii_p_c, ii_p_nc;
73static struct qdio_perf_stats perf_stats;
1da177e4
LT		 74
75static int hydra_thinints;
8129ee16 76static int is_passthrough = 0;
1da177e4
LT		 77static int omit_svs;
78
79static int indicator_used[INDICATORS_PER_CACHELINE];
80static __u32 * volatile indicators;
81static __u32 volatile spare_indicator;
82static atomic_t spare_indicator_usecount;
a3ae39c0
AH		 83#define QDIO_MEMPOOL_SCSSC_ELEMENTS 2
84static mempool_t *qdio_mempool_scssc;
1da177e4
LT		 85
86static debug_info_t *qdio_dbf_setup;
87static debug_info_t *qdio_dbf_sbal;
88static debug_info_t *qdio_dbf_trace;
89static debug_info_t *qdio_dbf_sense;
90#ifdef CONFIG_QDIO_DEBUG
91static debug_info_t *qdio_dbf_slsb_out;
92static debug_info_t *qdio_dbf_slsb_in;
93#endif /* CONFIG_QDIO_DEBUG */
94
95/* iQDIO stuff: */
96static volatile struct qdio_q *tiq_list=NULL; /* volatile as it could change
97 during a while loop */
98static DEFINE_SPINLOCK(ttiq_list_lock);
99static int register_thinint_result;
100static void tiqdio_tl(unsigned long);
101static DECLARE_TASKLET(tiqdio_tasklet,tiqdio_tl,0);
102
103/* not a macro, as one of the arguments is atomic_read */
104static inline int
105qdio_min(int a,int b)
106{
107 if (a<b)
108 return a;
109 else
110 return b;
111}
112
113/***************** SCRUBBER HELPER ROUTINES **********************/
114
a46206e7 115static inline __u64
1da177e4
LT		 116qdio_get_micros(void)
117{
47addc84 118 return (get_clock() >> 12); /* time>>12 is microseconds */
1da177e4
LT		 119}
120
121/*
122 * unfortunately, we can't just xchg the values; in do_QDIO we want to reserve
123 * the q in any case, so that we'll not be interrupted when we are in
124 * qdio_mark_tiq... shouldn't have a really bad impact, as reserving almost
125 * ever works (last famous words)
126 */
127static inline int
128qdio_reserve_q(struct qdio_q *q)
129{
130 return atomic_add_return(1,&q->use_count) - 1;
131}
132
133static inline void
134qdio_release_q(struct qdio_q *q)
135{
136 atomic_dec(&q->use_count);
137}
138
8129ee16 139/*check ccq */
4d284cac 140static int
8129ee16 141qdio_check_ccq(struct qdio_q *q, unsigned int ccq)
1da177e4 142{
8129ee16
FP		 143 char dbf_text[15];
144
145 if (ccq == 0 || ccq == 32 || ccq == 96)
146 return 0;
147 if (ccq == 97)
148 return 1;
149 /*notify devices immediately*/
150 sprintf(dbf_text,"%d", ccq);
151 QDIO_DBF_TEXT2(1,trace,dbf_text);
152 return -EIO;
1da177e4 153}
8129ee16 154/* EQBS: extract buffer states */
4d284cac 155static int
8129ee16
FP		 156qdio_do_eqbs(struct qdio_q *q, unsigned char *state,
157 unsigned int *start, unsigned int *cnt)
158{
159 struct qdio_irq *irq;
160 unsigned int tmp_cnt, q_no, ccq;
161 int rc ;
162 char dbf_text[15];
1da177e4 163
8129ee16
FP		 164 ccq = 0;
165 tmp_cnt = *cnt;
166 irq = (struct qdio_irq*)q->irq_ptr;
167 q_no = q->q_no;
168 if(!q->is_input_q)
169 q_no += irq->no_input_qs;
15c73691 170again:
8129ee16
FP		 171 ccq = do_eqbs(irq->sch_token, state, q_no, start, cnt);
172 rc = qdio_check_ccq(q, ccq);
15c73691
FP		 173 if (rc == 1) {
174 QDIO_DBF_TEXT5(1,trace,"eqAGAIN");
175 goto again;
176 }
8129ee16
FP		 177 if (rc < 0) {
178 QDIO_DBF_TEXT2(1,trace,"eqberr");
179 sprintf(dbf_text,"%2x,%2x,%d,%d",tmp_cnt, *cnt, ccq, q_no);
180 QDIO_DBF_TEXT2(1,trace,dbf_text);
181 q->handler(q->cdev,QDIO_STATUS_ACTIVATE_CHECK_CONDITION|
182 QDIO_STATUS_LOOK_FOR_ERROR,
183 0, 0, 0, -1, -1, q->int_parm);
184 return 0;
185 }
186 return (tmp_cnt - *cnt);
187}
188
189/* SQBS: set buffer states */
4d284cac 190static int
8129ee16
FP		 191qdio_do_sqbs(struct qdio_q *q, unsigned char state,
192 unsigned int *start, unsigned int *cnt)
193{
194 struct qdio_irq *irq;
195 unsigned int tmp_cnt, q_no, ccq;
196 int rc;
197 char dbf_text[15];
198
199 ccq = 0;
200 tmp_cnt = *cnt;
201 irq = (struct qdio_irq*)q->irq_ptr;
202 q_no = q->q_no;
203 if(!q->is_input_q)
204 q_no += irq->no_input_qs;
15c73691 205again:
8129ee16
FP		 206 ccq = do_sqbs(irq->sch_token, state, q_no, start, cnt);
207 rc = qdio_check_ccq(q, ccq);
15c73691
FP		 208 if (rc == 1) {
209 QDIO_DBF_TEXT5(1,trace,"sqAGAIN");
210 goto again;
211 }
8129ee16 212 if (rc < 0) {
dcc49d46
UB		 213 QDIO_DBF_TEXT3(1,trace,"sqberr");
214 sprintf(dbf_text,"%2x,%2x",tmp_cnt,*cnt);
215 QDIO_DBF_TEXT3(1,trace,dbf_text);
216 sprintf(dbf_text,"%d,%d",ccq,q_no);
217 QDIO_DBF_TEXT3(1,trace,dbf_text);
8129ee16
FP		 218 q->handler(q->cdev,QDIO_STATUS_ACTIVATE_CHECK_CONDITION|
219 QDIO_STATUS_LOOK_FOR_ERROR,
220 0, 0, 0, -1, -1, q->int_parm);
221 return 0;
222 }
223 return (tmp_cnt - *cnt);
224}
225
226static inline int
227qdio_set_slsb(struct qdio_q *q, unsigned int *bufno,
228 unsigned char state, unsigned int *count)
229{
230 volatile char *slsb;
231 struct qdio_irq *irq;
232
233 irq = (struct qdio_irq*)q->irq_ptr;
234 if (!irq->is_qebsm) {
235 slsb = (char *)&q->slsb.acc.val[(*bufno)];
236 xchg(slsb, state);
237 return 1;
238 }
239 return qdio_do_sqbs(q, state, bufno, count);
240}
241
242#ifdef CONFIG_QDIO_DEBUG
243static inline void
244qdio_trace_slsb(struct qdio_q *q)
245{
246 if (q->queue_type==QDIO_TRACE_QTYPE) {
247 if (q->is_input_q)
248 QDIO_DBF_HEX2(0,slsb_in,&q->slsb,
249 QDIO_MAX_BUFFERS_PER_Q);
250 else
251 QDIO_DBF_HEX2(0,slsb_out,&q->slsb,
252 QDIO_MAX_BUFFERS_PER_Q);
253 }
254}
255#endif
256
257static inline int
258set_slsb(struct qdio_q *q, unsigned int *bufno,
259 unsigned char state, unsigned int *count)
260{
261 int rc;
262#ifdef CONFIG_QDIO_DEBUG
263 qdio_trace_slsb(q);
264#endif
265 rc = qdio_set_slsb(q, bufno, state, count);
266#ifdef CONFIG_QDIO_DEBUG
267 qdio_trace_slsb(q);
268#endif
269 return rc;
270}
1da177e4
LT		 271static inline int
272qdio_siga_sync(struct qdio_q *q, unsigned int gpr2,
273 unsigned int gpr3)
274{
275 int cc;
276
277 QDIO_DBF_TEXT4(0,trace,"sigasync");
278 QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
279
34249d0f
UB		 280 if (qdio_performance_stats)
281 perf_stats.siga_syncs++;
1da177e4 282
a8237fc4 283 cc = do_siga_sync(q->schid, gpr2, gpr3);
1da177e4
LT		 284 if (cc)
285 QDIO_DBF_HEX3(0,trace,&cc,sizeof(int*));
286
287 return cc;
288}
289
290static inline int
291qdio_siga_sync_q(struct qdio_q *q)
292{
293 if (q->is_input_q)
294 return qdio_siga_sync(q, 0, q->mask);
295 return qdio_siga_sync(q, q->mask, 0);
296}
297
8129ee16
FP		 298static int
299__do_siga_output(struct qdio_q *q, unsigned int *busy_bit)
300{
301 struct qdio_irq *irq;
302 unsigned int fc = 0;
a8237fc4 303 unsigned long schid;
8129ee16
FP		 304
305 irq = (struct qdio_irq *) q->irq_ptr;
306 if (!irq->is_qebsm)
a8237fc4
CH		 307 schid = *((u32 *)&q->schid);
308 else {
309 schid = irq->sch_token;
310 fc |= 0x80;
311 }
312 return do_siga_output(schid, q->mask, busy_bit, fc);
8129ee16
FP		 313}
314
1da177e4
LT		 315/*
316 * returns QDIO_SIGA_ERROR_ACCESS_EXCEPTION as cc, when SIGA returns
317 * an access exception
318 */
4d284cac 319static int
1da177e4
LT		 320qdio_siga_output(struct qdio_q *q)
321{
322 int cc;
323 __u32 busy_bit;
324 __u64 start_time=0;
325
34249d0f
UB		 326 if (qdio_performance_stats)
327 perf_stats.siga_outs++;
1da177e4
LT		 328
329 QDIO_DBF_TEXT4(0,trace,"sigaout");
330 QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
331
332 for (;;) {
8129ee16 333 cc = __do_siga_output(q, &busy_bit);
1da177e4
LT		 334//QDIO_PRINT_ERR("cc=%x, busy=%x\n",cc,busy_bit);
335 if ((cc==2) && (busy_bit) && (q->is_iqdio_q)) {
336 if (!start_time)
337 start_time=NOW;
338 if ((NOW-start_time)>QDIO_BUSY_BIT_PATIENCE)
339 break;
340 } else
341 break;
342 }
343
344 if ((cc==2) && (busy_bit))
345 cc |= QDIO_SIGA_ERROR_B_BIT_SET;
346
347 if (cc)
348 QDIO_DBF_HEX3(0,trace,&cc,sizeof(int*));
349
350 return cc;
351}
352
4d284cac 353static int
1da177e4
LT		 354qdio_siga_input(struct qdio_q *q)
355{
356 int cc;
357
358 QDIO_DBF_TEXT4(0,trace,"sigain");
359 QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
360
34249d0f
UB		 361 if (qdio_performance_stats)
362 perf_stats.siga_ins++;
1da177e4 363
a8237fc4 364 cc = do_siga_input(q->schid, q->mask);
1da177e4
LT		 365
366 if (cc)
367 QDIO_DBF_HEX3(0,trace,&cc,sizeof(int*));
368
369 return cc;
370}
371
372/* locked by the locks in qdio_activate and qdio_cleanup */
8129ee16 373static __u32 *
1da177e4
LT		 374qdio_get_indicator(void)
375{
376 int i;
377
378 for (i=1;i<INDICATORS_PER_CACHELINE;i++)
379 if (!indicator_used[i]) {
380 indicator_used[i]=1;
381 return indicators+i;
382 }
383 atomic_inc(&spare_indicator_usecount);
384 return (__u32 * volatile) &spare_indicator;
385}
386
387/* locked by the locks in qdio_activate and qdio_cleanup */
388static void
389qdio_put_indicator(__u32 *addr)
390{
391 int i;
392
393 if ( (addr) && (addr!=&spare_indicator) ) {
394 i=addr-indicators;
395 indicator_used[i]=0;
396 }
397 if (addr == &spare_indicator)
398 atomic_dec(&spare_indicator_usecount);
399}
400
8129ee16 401static inline void
1da177e4
LT		 402tiqdio_clear_summary_bit(__u32 *location)
403{
404 QDIO_DBF_TEXT5(0,trace,"clrsummb");
405 QDIO_DBF_HEX5(0,trace,&location,sizeof(void*));
406
407 xchg(location,0);
408}
409
8129ee16 410static inline void
1da177e4
LT		 411tiqdio_set_summary_bit(__u32 *location)
412{
413 QDIO_DBF_TEXT5(0,trace,"setsummb");
414 QDIO_DBF_HEX5(0,trace,&location,sizeof(void*));
415
416 xchg(location,-1);
417}
418
419static inline void
420tiqdio_sched_tl(void)
421{
422 tasklet_hi_schedule(&tiqdio_tasklet);
423}
424
4d284cac 425static void
1da177e4
LT		 426qdio_mark_tiq(struct qdio_q *q)
427{
428 unsigned long flags;
429
430 QDIO_DBF_TEXT4(0,trace,"mark iq");
431 QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
432
433 spin_lock_irqsave(&ttiq_list_lock,flags);
434 if (unlikely(atomic_read(&q->is_in_shutdown)))
435 goto out_unlock;
436
437 if (!q->is_input_q)
438 goto out_unlock;
439
440 if ((q->list_prev) || (q->list_next))
441 goto out_unlock;
442
443 if (!tiq_list) {
444 tiq_list=q;
445 q->list_prev=q;
446 q->list_next=q;
447 } else {
448 q->list_next=tiq_list;
449 q->list_prev=tiq_list->list_prev;
450 tiq_list->list_prev->list_next=q;
451 tiq_list->list_prev=q;
452 }
453 spin_unlock_irqrestore(&ttiq_list_lock,flags);
454
455 tiqdio_set_summary_bit((__u32*)q->dev_st_chg_ind);
456 tiqdio_sched_tl();
457 return;
458out_unlock:
459 spin_unlock_irqrestore(&ttiq_list_lock,flags);
460 return;
461}
462
463static inline void
464qdio_mark_q(struct qdio_q *q)
465{
466 QDIO_DBF_TEXT4(0,trace,"mark q");
467 QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
468
469 if (unlikely(atomic_read(&q->is_in_shutdown)))
470 return;
471
472 tasklet_schedule(&q->tasklet);
473}
474
4d284cac 475static int
1da177e4
LT		 476qdio_stop_polling(struct qdio_q *q)
477{
478#ifdef QDIO_USE_PROCESSING_STATE
8129ee16
FP		 479 unsigned int tmp, gsf, count = 1;
480 unsigned char state = 0;
481 struct qdio_irq *irq = (struct qdio_irq *) q->irq_ptr;
1da177e4 482
9163bb2e 483 if (!atomic_xchg(&q->polling,0))
1da177e4
LT		 484 return 1;
485
486 QDIO_DBF_TEXT4(0,trace,"stoppoll");
487 QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
488
489 /* show the card that we are not polling anymore */
490 if (!q->is_input_q)
491 return 1;
492
8129ee16
FP		 493 tmp = gsf = GET_SAVED_FRONTIER(q);
494 tmp = ((tmp + QDIO_MAX_BUFFERS_PER_Q-1) & (QDIO_MAX_BUFFERS_PER_Q-1) );
495 set_slsb(q, &tmp, SLSB_P_INPUT_NOT_INIT, &count);
496
1da177e4
LT		 497 /*
498 * we don't issue this SYNC_MEMORY, as we trust Rick T and
499 * moreover will not use the PROCESSING state under VM, so
500 * q->polling was 0 anyway
501 */
502 /*SYNC_MEMORY;*/
8129ee16
FP		 503 if (irq->is_qebsm) {
504 count = 1;
505 qdio_do_eqbs(q, &state, &gsf, &count);
506 } else
507 state = q->slsb.acc.val[gsf];
508 if (state != SLSB_P_INPUT_PRIMED)
1da177e4
LT		 509 return 1;
510 /*
511 * set our summary bit again, as otherwise there is a
512 * small window we can miss between resetting it and
513 * checking for PRIMED state
514 */
515 if (q->is_thinint_q)
516 tiqdio_set_summary_bit((__u32*)q->dev_st_chg_ind);
517 return 0;
518
519#else /* QDIO_USE_PROCESSING_STATE */
520 return 1;
521#endif /* QDIO_USE_PROCESSING_STATE */
522}
523
524/*
525 * see the comment in do_QDIO and before qdio_reserve_q about the
526 * sophisticated locking outside of unmark_q, so that we don't need to
527 * disable the interrupts :-)
528*/
4d284cac 529static void
1da177e4
LT		 530qdio_unmark_q(struct qdio_q *q)
531{
532 unsigned long flags;
533
534 QDIO_DBF_TEXT4(0,trace,"unmark q");
535 QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
536
537 if ((!q->list_prev)||(!q->list_next))
538 return;
539
540 if ((q->is_thinint_q)&&(q->is_input_q)) {
541 /* iQDIO */
542 spin_lock_irqsave(&ttiq_list_lock,flags);
543 /* in case cleanup has done this already and simultanously
544 * qdio_unmark_q is called from the interrupt handler, we've
545 * got to check this in this specific case again */
546 if ((!q->list_prev)||(!q->list_next))
547 goto out;
548 if (q->list_next==q) {
549 /* q was the only interesting q */
550 tiq_list=NULL;
551 q->list_next=NULL;
552 q->list_prev=NULL;
553 } else {
554 q->list_next->list_prev=q->list_prev;
555 q->list_prev->list_next=q->list_next;
556 tiq_list=q->list_next;
557 q->list_next=NULL;
558 q->list_prev=NULL;
559 }
560out:
561 spin_unlock_irqrestore(&ttiq_list_lock,flags);
562 }
563}
564
565static inline unsigned long
566tiqdio_clear_global_summary(void)
567{
568 unsigned long time;
569
570 QDIO_DBF_TEXT5(0,trace,"clrglobl");
571
572 time = do_clear_global_summary();
573
574 QDIO_DBF_HEX5(0,trace,&time,sizeof(unsigned long));
575
576 return time;
577}
578
579
580/************************* OUTBOUND ROUTINES *******************************/
8129ee16
FP		 581static int
582qdio_qebsm_get_outbound_buffer_frontier(struct qdio_q *q)
583{
584 struct qdio_irq *irq;
585 unsigned char state;
586 unsigned int cnt, count, ftc;
587
588 irq = (struct qdio_irq *) q->irq_ptr;
589 if ((!q->is_iqdio_q) && (!q->hydra_gives_outbound_pcis))
590 SYNC_MEMORY;
591
592 ftc = q->first_to_check;
593 count = qdio_min(atomic_read(&q->number_of_buffers_used),
594 (QDIO_MAX_BUFFERS_PER_Q-1));
595 if (count == 0)
596 return q->first_to_check;
597 cnt = qdio_do_eqbs(q, &state, &ftc, &count);
598 if (cnt == 0)
599 return q->first_to_check;
600 switch (state) {
601 case SLSB_P_OUTPUT_ERROR:
602 QDIO_DBF_TEXT3(0,trace,"outperr");
603 atomic_sub(cnt , &q->number_of_buffers_used);
604 if (q->qdio_error)
605 q->error_status_flags |=
606 QDIO_STATUS_MORE_THAN_ONE_QDIO_ERROR;
607 q->qdio_error = SLSB_P_OUTPUT_ERROR;
608 q->error_status_flags |= QDIO_STATUS_LOOK_FOR_ERROR;
609 q->first_to_check = ftc;
610 break;
611 case SLSB_P_OUTPUT_EMPTY:
612 QDIO_DBF_TEXT5(0,trace,"outpempt");
613 atomic_sub(cnt, &q->number_of_buffers_used);
614 q->first_to_check = ftc;
615 break;
616 case SLSB_CU_OUTPUT_PRIMED:
617 /* all buffers primed */
618 QDIO_DBF_TEXT5(0,trace,"outpprim");
619 break;
620 default:
621 break;
622 }
623 QDIO_DBF_HEX4(0,trace,&q->first_to_check,sizeof(int));
624 return q->first_to_check;
625}
626
627static int
628qdio_qebsm_get_inbound_buffer_frontier(struct qdio_q *q)
629{
630 struct qdio_irq *irq;
631 unsigned char state;
632 int tmp, ftc, count, cnt;
633 char dbf_text[15];
634
635
636 irq = (struct qdio_irq *) q->irq_ptr;
637 ftc = q->first_to_check;
638 count = qdio_min(atomic_read(&q->number_of_buffers_used),
639 (QDIO_MAX_BUFFERS_PER_Q-1));
640 if (count == 0)
641 return q->first_to_check;
642 cnt = qdio_do_eqbs(q, &state, &ftc, &count);
643 if (cnt == 0)
644 return q->first_to_check;
645 switch (state) {
646 case SLSB_P_INPUT_ERROR :
647#ifdef CONFIG_QDIO_DEBUG
648 QDIO_DBF_TEXT3(1,trace,"inperr");
649 sprintf(dbf_text,"%2x,%2x",ftc,count);
650 QDIO_DBF_TEXT3(1,trace,dbf_text);
651#endif /* CONFIG_QDIO_DEBUG */
652 if (q->qdio_error)
653 q->error_status_flags |=
654 QDIO_STATUS_MORE_THAN_ONE_QDIO_ERROR;
655 q->qdio_error = SLSB_P_INPUT_ERROR;
656 q->error_status_flags |= QDIO_STATUS_LOOK_FOR_ERROR;
657 atomic_sub(cnt, &q->number_of_buffers_used);
658 q->first_to_check = ftc;
659 break;
660 case SLSB_P_INPUT_PRIMED :
661 QDIO_DBF_TEXT3(0,trace,"inptprim");
662 sprintf(dbf_text,"%2x,%2x",ftc,count);
663 QDIO_DBF_TEXT3(1,trace,dbf_text);
664 tmp = 0;
665 ftc = q->first_to_check;
666#ifdef QDIO_USE_PROCESSING_STATE
667 if (cnt > 1) {
668 cnt -= 1;
669 tmp = set_slsb(q, &ftc, SLSB_P_INPUT_NOT_INIT, &cnt);
670 if (!tmp)
671 break;
672 }
673 cnt = 1;
674 tmp += set_slsb(q, &ftc,
675 SLSB_P_INPUT_PROCESSING, &cnt);
676 atomic_set(&q->polling, 1);
677#else
678 tmp = set_slsb(q, &ftc, SLSB_P_INPUT_NOT_INIT, &cnt);
679#endif
680 atomic_sub(tmp, &q->number_of_buffers_used);
681 q->first_to_check = ftc;
682 break;
683 case SLSB_CU_INPUT_EMPTY:
684 case SLSB_P_INPUT_NOT_INIT:
685 case SLSB_P_INPUT_PROCESSING:
686 QDIO_DBF_TEXT5(0,trace,"inpnipro");
687 break;
688 default:
689 break;
690 }
691 QDIO_DBF_HEX4(0,trace,&q->first_to_check,sizeof(int));
692 return q->first_to_check;
693}
1da177e4 694
4d284cac 695static int
1da177e4
LT		 696qdio_get_outbound_buffer_frontier(struct qdio_q *q)
697{
8129ee16
FP		 698 struct qdio_irq *irq;
699 volatile char *slsb;
700 unsigned int count = 1;
701 int first_not_to_check, f, f_mod_no;
1da177e4
LT		 702 char dbf_text[15];
703
704 QDIO_DBF_TEXT4(0,trace,"getobfro");
705 QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
706
8129ee16
FP		 707 irq = (struct qdio_irq *) q->irq_ptr;
708 if (irq->is_qebsm)
709 return qdio_qebsm_get_outbound_buffer_frontier(q);
710
1da177e4
LT		 711 slsb=&q->slsb.acc.val[0];
712 f_mod_no=f=q->first_to_check;
713 /*
714 * f points to already processed elements, so f+no_used is correct...
715 * ... but: we don't check 128 buffers, as otherwise
716 * qdio_has_outbound_q_moved would return 0
717 */
718 first_not_to_check=f+qdio_min(atomic_read(&q->number_of_buffers_used),
719 (QDIO_MAX_BUFFERS_PER_Q-1));
720
721 if ((!q->is_iqdio_q)&&(!q->hydra_gives_outbound_pcis))
722 SYNC_MEMORY;
723
724check_next:
725 if (f==first_not_to_check)
726 goto out;
727
728 switch(slsb[f_mod_no]) {
729
730 /* the adapter has not fetched the output yet */
731 case SLSB_CU_OUTPUT_PRIMED:
732 QDIO_DBF_TEXT5(0,trace,"outpprim");
733 break;
734
735 /* the adapter got it */
736 case SLSB_P_OUTPUT_EMPTY:
737 atomic_dec(&q->number_of_buffers_used);
738 f++;
739 f_mod_no=f&(QDIO_MAX_BUFFERS_PER_Q-1);
740 QDIO_DBF_TEXT5(0,trace,"outpempt");
741 goto check_next;
742
743 case SLSB_P_OUTPUT_ERROR:
744 QDIO_DBF_TEXT3(0,trace,"outperr");
745 sprintf(dbf_text,"%x-%x-%x",f_mod_no,
746 q->sbal[f_mod_no]->element[14].sbalf.value,
747 q->sbal[f_mod_no]->element[15].sbalf.value);
748 QDIO_DBF_TEXT3(1,trace,dbf_text);
749 QDIO_DBF_HEX2(1,sbal,q->sbal[f_mod_no],256);
750
751 /* kind of process the buffer */
8129ee16 752 set_slsb(q, &f_mod_no, SLSB_P_OUTPUT_NOT_INIT, &count);
1da177e4
LT		 753
754 /*
755 * we increment the frontier, as this buffer
756 * was processed obviously
757 */
758 atomic_dec(&q->number_of_buffers_used);
759 f_mod_no=(f_mod_no+1)&(QDIO_MAX_BUFFERS_PER_Q-1);
760
761 if (q->qdio_error)
762 q->error_status_flags|=
763 QDIO_STATUS_MORE_THAN_ONE_QDIO_ERROR;
764 q->qdio_error=SLSB_P_OUTPUT_ERROR;
765 q->error_status_flags|=QDIO_STATUS_LOOK_FOR_ERROR;
766
767 break;
768
769 /* no new buffers */
770 default:
771 QDIO_DBF_TEXT5(0,trace,"outpni");
772 }
773out:
774 return (q->first_to_check=f_mod_no);
775}
776
777/* all buffers are processed */
4d284cac 778static int
1da177e4
LT		 779qdio_is_outbound_q_done(struct qdio_q *q)
780{
781 int no_used;
782#ifdef CONFIG_QDIO_DEBUG
783 char dbf_text[15];
784#endif
785
786 no_used=atomic_read(&q->number_of_buffers_used);
787
788#ifdef CONFIG_QDIO_DEBUG
789 if (no_used) {
790 sprintf(dbf_text,"oqisnt%02x",no_used);
791 QDIO_DBF_TEXT4(0,trace,dbf_text);
792 } else {
793 QDIO_DBF_TEXT4(0,trace,"oqisdone");
794 }
795 QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
796#endif /* CONFIG_QDIO_DEBUG */
797 return (no_used==0);
798}
799
4d284cac 800static int
1da177e4
LT		 801qdio_has_outbound_q_moved(struct qdio_q *q)
802{
803 int i;
804
805 i=qdio_get_outbound_buffer_frontier(q);
806
807 if ( (i!=GET_SAVED_FRONTIER(q)) ||
808 (q->error_status_flags&QDIO_STATUS_LOOK_FOR_ERROR) ) {
809 SAVE_FRONTIER(q,i);
810 QDIO_DBF_TEXT4(0,trace,"oqhasmvd");
811 QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
812 return 1;
813 } else {
814 QDIO_DBF_TEXT4(0,trace,"oqhsntmv");
815 QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
816 return 0;
817 }
818}
819
4d284cac 820static void
1da177e4
LT		 821qdio_kick_outbound_q(struct qdio_q *q)
822{
823 int result;
824#ifdef CONFIG_QDIO_DEBUG
825 char dbf_text[15];
826
827 QDIO_DBF_TEXT4(0,trace,"kickoutq");
828 QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
829#endif /* CONFIG_QDIO_DEBUG */
830
831 if (!q->siga_out)
832 return;
833
834 /* here's the story with cc=2 and busy bit set (thanks, Rick):
835 * VM's CP could present us cc=2 and busy bit set on SIGA-write
836 * during reconfiguration of their Guest LAN (only in HIPERS mode,
837 * QDIO mode is asynchronous -- cc=2 and busy bit there will take
838 * the queues down immediately; and not being under VM we have a
839 * problem on cc=2 and busy bit set right away).
840 *
841 * Therefore qdio_siga_output will try for a short time constantly,
842 * if such a condition occurs. If it doesn't change, it will
843 * increase the busy_siga_counter and save the timestamp, and
844 * schedule the queue for later processing (via mark_q, using the
845 * queue tasklet). __qdio_outbound_processing will check out the
846 * counter. If non-zero, it will call qdio_kick_outbound_q as often
847 * as the value of the counter. This will attempt further SIGA
848 * instructions. For each successful SIGA, the counter is
849 * decreased, for failing SIGAs the counter remains the same, after
850 * all.
851 * After some time of no movement, qdio_kick_outbound_q will
852 * finally fail and reflect corresponding error codes to call
853 * the upper layer module and have it take the queues down.
854 *
855 * Note that this is a change from the original HiperSockets design
856 * (saying cc=2 and busy bit means take the queues down), but in
857 * these days Guest LAN didn't exist... excessive cc=2 with busy bit
858 * conditions will still take the queues down, but the threshold is
859 * higher due to the Guest LAN environment.
860 */
861
862
863 result=qdio_siga_output(q);
864
8129ee16
FP		 865 switch (result) {
866 case 0:
867 /* went smooth this time, reset timestamp */
1da177e4 868#ifdef CONFIG_QDIO_DEBUG
8129ee16 869 QDIO_DBF_TEXT3(0,trace,"cc2reslv");
a8237fc4 870 sprintf(dbf_text,"%4x%2x%2x",q->schid.sch_no,q->q_no,
8129ee16
FP		 871 atomic_read(&q->busy_siga_counter));
872 QDIO_DBF_TEXT3(0,trace,dbf_text);
1da177e4 873#endif /* CONFIG_QDIO_DEBUG */
8129ee16
FP		 874 q->timing.busy_start=0;
875 break;
876 case (2|QDIO_SIGA_ERROR_B_BIT_SET):
877 /* cc=2 and busy bit: */
878 atomic_inc(&q->busy_siga_counter);
879
880 /* if the last siga was successful, save
881 * timestamp here */
882 if (!q->timing.busy_start)
883 q->timing.busy_start=NOW;
884
885 /* if we're in time, don't touch error_status_flags
886 * and siga_error */
887 if (NOW-q->timing.busy_start<QDIO_BUSY_BIT_GIVE_UP) {
888 qdio_mark_q(q);
1da177e4 889 break;
8129ee16
FP		 890 }
891 QDIO_DBF_TEXT2(0,trace,"cc2REPRT");
1da177e4 892#ifdef CONFIG_QDIO_DEBUG
a8237fc4 893 sprintf(dbf_text,"%4x%2x%2x",q->schid.sch_no,q->q_no,
8129ee16
FP		 894 atomic_read(&q->busy_siga_counter));
895 QDIO_DBF_TEXT3(0,trace,dbf_text);
1da177e4 896#endif /* CONFIG_QDIO_DEBUG */
8129ee16
FP		 897 /* else fallthrough and report error */
898 default:
899 /* for plain cc=1, 2 or 3: */
900 if (q->siga_error)
1da177e4 901 q->error_status_flags|=
8129ee16
FP		 902 QDIO_STATUS_MORE_THAN_ONE_SIGA_ERROR;
903 q->error_status_flags|=
904 QDIO_STATUS_LOOK_FOR_ERROR;
905 q->siga_error=result;
906 }
1da177e4
LT		 907}
908
4d284cac 909static void
1da177e4
LT		 910qdio_kick_outbound_handler(struct qdio_q *q)
911{
912 int start, end, real_end, count;
913#ifdef CONFIG_QDIO_DEBUG
914 char dbf_text[15];
915#endif
916
917 start = q->first_element_to_kick;
918 /* last_move_ftc was just updated */
919 real_end = GET_SAVED_FRONTIER(q);
920 end = (real_end+QDIO_MAX_BUFFERS_PER_Q-1)&
921 (QDIO_MAX_BUFFERS_PER_Q-1);
922 count = (end+QDIO_MAX_BUFFERS_PER_Q+1-start)&
923 (QDIO_MAX_BUFFERS_PER_Q-1);
924
925#ifdef CONFIG_QDIO_DEBUG
926 QDIO_DBF_TEXT4(0,trace,"kickouth");
927 QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
928
929 sprintf(dbf_text,"s=%2xc=%2x",start,count);
930 QDIO_DBF_TEXT4(0,trace,dbf_text);
931#endif /* CONFIG_QDIO_DEBUG */
932
933 if (q->state==QDIO_IRQ_STATE_ACTIVE)
934 q->handler(q->cdev,QDIO_STATUS_OUTBOUND_INT|
935 q->error_status_flags,
936 q->qdio_error,q->siga_error,q->q_no,start,count,
937 q->int_parm);
938
939 /* for the next time: */
940 q->first_element_to_kick=real_end;
941 q->qdio_error=0;
942 q->siga_error=0;
943 q->error_status_flags=0;
944}
945
4d284cac 946static void
1da177e4
LT		 947__qdio_outbound_processing(struct qdio_q *q)
948{
949 int siga_attempts;
950
951 QDIO_DBF_TEXT4(0,trace,"qoutproc");
952 QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
953
954 if (unlikely(qdio_reserve_q(q))) {
955 qdio_release_q(q);
34249d0f
UB		 956 if (qdio_performance_stats)
957 o_p_c++;
1da177e4
LT		 958 /* as we're sissies, we'll check next time */
959 if (likely(!atomic_read(&q->is_in_shutdown))) {
960 qdio_mark_q(q);
961 QDIO_DBF_TEXT4(0,trace,"busy,agn");
962 }
963 return;
964 }
34249d0f
UB		 965 if (qdio_performance_stats) {
966 o_p_nc++;
967 perf_stats.tl_runs++;
968 }
1da177e4
LT		 969
970 /* see comment in qdio_kick_outbound_q */
971 siga_attempts=atomic_read(&q->busy_siga_counter);
972 while (siga_attempts) {
973 atomic_dec(&q->busy_siga_counter);
974 qdio_kick_outbound_q(q);
975 siga_attempts--;
976 }
977
978 if (qdio_has_outbound_q_moved(q))
979 qdio_kick_outbound_handler(q);
980
981 if (q->is_iqdio_q) {
982 /*
028cf917
UB		 983 * for asynchronous queues, we better check, if the sent
984 * buffer is already switched from PRIMED to EMPTY.
1da177e4 985 */
028cf917
UB		 986 if ((q->queue_type == QDIO_IQDIO_QFMT_ASYNCH) &&
987 !qdio_is_outbound_q_done(q))
1da177e4
LT		 988 qdio_mark_q(q);
989
990 } else if (!q->hydra_gives_outbound_pcis)
991 if (!qdio_is_outbound_q_done(q))
992 qdio_mark_q(q);
993
994 qdio_release_q(q);
995}
996
997static void
998qdio_outbound_processing(struct qdio_q *q)
999{
1000 __qdio_outbound_processing(q);
1001}
1002
1003/************************* INBOUND ROUTINES *******************************/
1004
1005
4d284cac 1006static int
1da177e4
LT		 1007qdio_get_inbound_buffer_frontier(struct qdio_q *q)
1008{
8129ee16 1009 struct qdio_irq *irq;
1da177e4
LT		 1010 int f,f_mod_no;
1011 volatile char *slsb;
8129ee16 1012 unsigned int count = 1;
1da177e4
LT		 1013 int first_not_to_check;
1014#ifdef CONFIG_QDIO_DEBUG
1015 char dbf_text[15];
1016#endif /* CONFIG_QDIO_DEBUG */
1017#ifdef QDIO_USE_PROCESSING_STATE
1018 int last_position=-1;
1019#endif /* QDIO_USE_PROCESSING_STATE */
1020
1021 QDIO_DBF_TEXT4(0,trace,"getibfro");
1022 QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
1023
8129ee16
FP		 1024 irq = (struct qdio_irq *) q->irq_ptr;
1025 if (irq->is_qebsm)
1026 return qdio_qebsm_get_inbound_buffer_frontier(q);
1027
1da177e4
LT		 1028 slsb=&q->slsb.acc.val[0];
1029 f_mod_no=f=q->first_to_check;
1030 /*
1031 * we don't check 128 buffers, as otherwise qdio_has_inbound_q_moved
1032 * would return 0
1033 */
1034 first_not_to_check=f+qdio_min(atomic_read(&q->number_of_buffers_used),
1035 (QDIO_MAX_BUFFERS_PER_Q-1));
1036
1037 /*
1038 * we don't use this one, as a PCI or we after a thin interrupt
1039 * will sync the queues
1040 */
1041 /* SYNC_MEMORY;*/
1042
1043check_next:
1044 f_mod_no=f&(QDIO_MAX_BUFFERS_PER_Q-1);
1045 if (f==first_not_to_check)
1046 goto out;
1047 switch (slsb[f_mod_no]) {
1048
1049 /* CU_EMPTY means frontier is reached */
1050 case SLSB_CU_INPUT_EMPTY:
1051 QDIO_DBF_TEXT5(0,trace,"inptempt");
1052 break;
1053
1054 /* P_PRIMED means set slsb to P_PROCESSING and move on */
1055 case SLSB_P_INPUT_PRIMED:
1056 QDIO_DBF_TEXT5(0,trace,"inptprim");
1057
1058#ifdef QDIO_USE_PROCESSING_STATE
1059 /*
1060 * as soon as running under VM, polling the input queues will
1061 * kill VM in terms of CP overhead
1062 */
1063 if (q->siga_sync) {
8129ee16 1064 set_slsb(q, &f_mod_no, SLSB_P_INPUT_NOT_INIT, &count);
1da177e4
LT		 1065 } else {
1066 /* set the previous buffer to NOT_INIT. The current
1067 * buffer will be set to PROCESSING at the end of
1068 * this function to avoid further interrupts. */
1069 if (last_position>=0)
8129ee16
FP		 1070 set_slsb(q, &last_position,
1071 SLSB_P_INPUT_NOT_INIT, &count);
1da177e4
LT		 1072 atomic_set(&q->polling,1);
1073 last_position=f_mod_no;
1074 }
1075#else /* QDIO_USE_PROCESSING_STATE */
8129ee16 1076 set_slsb(q, &f_mod_no, SLSB_P_INPUT_NOT_INIT, &count);
1da177e4
LT		 1077#endif /* QDIO_USE_PROCESSING_STATE */
1078 /*
1079 * not needed, as the inbound queue will be synced on the next
1080 * siga-r, resp. tiqdio_is_inbound_q_done will do the siga-s
1081 */
1082 /*SYNC_MEMORY;*/
1083 f++;
1084 atomic_dec(&q->number_of_buffers_used);
1085 goto check_next;
1086
1087 case SLSB_P_INPUT_NOT_INIT:
1088 case SLSB_P_INPUT_PROCESSING:
1089 QDIO_DBF_TEXT5(0,trace,"inpnipro");
1090 break;
1091
1092 /* P_ERROR means frontier is reached, break and report error */
1093 case SLSB_P_INPUT_ERROR:
1094#ifdef CONFIG_QDIO_DEBUG
1095 sprintf(dbf_text,"inperr%2x",f_mod_no);
1096 QDIO_DBF_TEXT3(1,trace,dbf_text);
1097#endif /* CONFIG_QDIO_DEBUG */
1098 QDIO_DBF_HEX2(1,sbal,q->sbal[f_mod_no],256);
1099
1100 /* kind of process the buffer */
8129ee16 1101 set_slsb(q, &f_mod_no, SLSB_P_INPUT_NOT_INIT, &count);
1da177e4
LT		 1102
1103 if (q->qdio_error)
1104 q->error_status_flags|=
1105 QDIO_STATUS_MORE_THAN_ONE_QDIO_ERROR;
1106 q->qdio_error=SLSB_P_INPUT_ERROR;
1107 q->error_status_flags|=QDIO_STATUS_LOOK_FOR_ERROR;
1108
1109 /* we increment the frontier, as this buffer
1110 * was processed obviously */
1111 f_mod_no=(f_mod_no+1)&(QDIO_MAX_BUFFERS_PER_Q-1);
1112 atomic_dec(&q->number_of_buffers_used);
1113
1114#ifdef QDIO_USE_PROCESSING_STATE
1115 last_position=-1;
1116#endif /* QDIO_USE_PROCESSING_STATE */
1117
1118 break;
1119
1120 /* everything else means frontier not changed (HALTED or so) */
1121 default:
1122 break;
1123 }
1124out:
1125 q->first_to_check=f_mod_no;
1126
1127#ifdef QDIO_USE_PROCESSING_STATE
1128 if (last_position>=0)
6981e936 1129 set_slsb(q, &last_position, SLSB_P_INPUT_PROCESSING, &count);
1da177e4
LT		 1130#endif /* QDIO_USE_PROCESSING_STATE */
1131
1132 QDIO_DBF_HEX4(0,trace,&q->first_to_check,sizeof(int));
1133
1134 return q->first_to_check;
1135}
1136
4d284cac 1137static int
1da177e4
LT		 1138qdio_has_inbound_q_moved(struct qdio_q *q)
1139{
1140 int i;
1141
1da177e4
LT		 1142 static int old_pcis=0;
1143 static int old_thinints=0;
1144
34249d0f
UB		 1145 if (qdio_performance_stats) {
1146 if ((old_pcis==perf_stats.pcis)&&
1147 (old_thinints==perf_stats.thinints))
1148 perf_stats.start_time_inbound=NOW;
1149 else
1150 old_pcis=perf_stats.pcis;
1151 }
1da177e4
LT		 1152
1153 i=qdio_get_inbound_buffer_frontier(q);
1154 if ( (i!=GET_SAVED_FRONTIER(q)) ||
1155 (q->error_status_flags&QDIO_STATUS_LOOK_FOR_ERROR) ) {
1156 SAVE_FRONTIER(q,i);
1157 if ((!q->siga_sync)&&(!q->hydra_gives_outbound_pcis))
1158 SAVE_TIMESTAMP(q);
1159
1160 QDIO_DBF_TEXT4(0,trace,"inhasmvd");
1161 QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
1162 return 1;
1163 } else {
1164 QDIO_DBF_TEXT4(0,trace,"inhsntmv");
1165 QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
1166 return 0;
1167 }
1168}
1169
1170/* means, no more buffers to be filled */
4d284cac 1171static int
1da177e4
LT		 1172tiqdio_is_inbound_q_done(struct qdio_q *q)
1173{
1174 int no_used;
8129ee16
FP		 1175 unsigned int start_buf, count;
1176 unsigned char state = 0;
1177 struct qdio_irq *irq = (struct qdio_irq *) q->irq_ptr;
1178
1da177e4
LT		 1179#ifdef CONFIG_QDIO_DEBUG
1180 char dbf_text[15];
1181#endif
1182
1183 no_used=atomic_read(&q->number_of_buffers_used);
1184
1185 /* propagate the change from 82 to 80 through VM */
1186 SYNC_MEMORY;
1187
1188#ifdef CONFIG_QDIO_DEBUG
1189 if (no_used) {
1190 sprintf(dbf_text,"iqisnt%02x",no_used);
1191 QDIO_DBF_TEXT4(0,trace,dbf_text);
1192 } else {
1193 QDIO_DBF_TEXT4(0,trace,"iniqisdo");
1194 }
1195 QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
1196#endif /* CONFIG_QDIO_DEBUG */
1197
1198 if (!no_used)
1199 return 1;
15c73691 1200 if (!q->siga_sync && !irq->is_qebsm)
1da177e4
LT		 1201 /* we'll check for more primed buffers in qeth_stop_polling */
1202 return 0;
8129ee16
FP		 1203 if (irq->is_qebsm) {
1204 count = 1;
1205 start_buf = q->first_to_check;
1206 qdio_do_eqbs(q, &state, &start_buf, &count);
1207 } else
1208 state = q->slsb.acc.val[q->first_to_check];
1209 if (state != SLSB_P_INPUT_PRIMED)
1da177e4
LT		 1210 /*
1211 * nothing more to do, if next buffer is not PRIMED.
1212 * note that we did a SYNC_MEMORY before, that there
1213 * has been a sychnronization.
1214 * we will return 0 below, as there is nothing to do
1215 * (stop_polling not necessary, as we have not been
1216 * using the PROCESSING state
1217 */
1218 return 0;
1219
1220 /*
1221 * ok, the next input buffer is primed. that means, that device state
1222 * change indicator and adapter local summary are set, so we will find
1223 * it next time.
1224 * we will return 0 below, as there is nothing to do, except scheduling
1225 * ourselves for the next time.
1226 */
1227 tiqdio_set_summary_bit((__u32*)q->dev_st_chg_ind);
1228 tiqdio_sched_tl();
1229 return 0;
1230}
1231
4d284cac 1232static int
1da177e4
LT		 1233qdio_is_inbound_q_done(struct qdio_q *q)
1234{
1235 int no_used;
8129ee16
FP		 1236 unsigned int start_buf, count;
1237 unsigned char state = 0;
1238 struct qdio_irq *irq = (struct qdio_irq *) q->irq_ptr;
1239
1da177e4
LT		 1240#ifdef CONFIG_QDIO_DEBUG
1241 char dbf_text[15];
1242#endif
1243
1244 no_used=atomic_read(&q->number_of_buffers_used);
1245
1246 /*
1247 * we need that one for synchronization with the adapter, as it
1248 * does a kind of PCI avoidance
1249 */
1250 SYNC_MEMORY;
1251
1252 if (!no_used) {
1253 QDIO_DBF_TEXT4(0,trace,"inqisdnA");
1254 QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
1da177e4
LT		 1255 return 1;
1256 }
8129ee16
FP		 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) {
1da177e4
LT		 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
4d284cac 1299static void
1da177e4
LT		 1300qdio_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
34249d0f
UB		 1340 if (qdio_performance_stats) {
1341 perf_stats.inbound_time+=NOW-perf_stats.start_time_inbound;
1342 perf_stats.inbound_cnt++;
1343 }
1da177e4
LT		 1344}
1345
4d284cac 1346static void
1da177e4
LT		 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);
34249d0f
UB		 1363 if (qdio_performance_stats)
1364 ii_p_c++;
1da177e4
LT		 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 }
34249d0f
UB		 1372 if (qdio_performance_stats)
1373 ii_p_nc++;
1da177e4
LT		 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];
34249d0f
UB		 1414 if (!qdio_is_outbound_q_done(oq)) {
1415 if (qdio_performance_stats)
1416 perf_stats.tl_runs--;
1da177e4 1417 __qdio_outbound_processing(oq);
34249d0f 1418 }
1da177e4
LT		 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 }
1435out:
1436 qdio_release_q(q);
1437}
1438
1439static void
1440tiqdio_inbound_processing(struct qdio_q *q)
1441{
1442 __tiqdio_inbound_processing(q, atomic_read(&spare_indicator_usecount));
1443}
1444
4d284cac 1445static void
1da177e4
LT		 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);
34249d0f
UB		 1455 if (qdio_performance_stats)
1456 i_p_c++;
1da177e4
LT		 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 }
34249d0f
UB		 1464 if (qdio_performance_stats) {
1465 i_p_nc++;
1466 perf_stats.tl_runs++;
1467 }
1da177e4
LT		 1468
1469again:
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
1487static void
1488qdio_inbound_processing(struct qdio_q *q)
1489{
1490 __qdio_inbound_processing(q);
1491}
1492
1493/************************* MAIN ROUTINES *******************************/
1494
1495#ifdef QDIO_USE_PROCESSING_STATE
4d284cac 1496static int
1da177e4
LT		 1497tiqdio_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);
34249d0f
UB		 1513 if (qdio_performance_stats)
1514 ii_p_c++;
1da177e4
LT		 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
4d284cac 1548static void
1da177e4
LT		 1549tiqdio_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
1561again:
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
1600static void
1601tiqdio_tl(unsigned long data)
1602{
1603 QDIO_DBF_TEXT4(0,trace,"iqdio_tl");
1604
34249d0f
UB		 1605 if (qdio_performance_stats)
1606 perf_stats.tl_runs++;
1da177e4
LT		 1607
1608 tiqdio_inbound_checks();
1609}
1610
1611/********************* GENERAL HELPER_ROUTINES ***********************/
1612
1613static void
1614qdio_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
17fd682e 1622 kfree(irq_ptr->input_qs[i]->slib);
1da177e4
LT		 1623 kfree(irq_ptr->input_qs[i]);
1624
1625next:
1626 if (!irq_ptr->output_qs[i])
1627 continue;
1628
17fd682e 1629 kfree(irq_ptr->output_qs[i]->slib);
1da177e4
LT		 1630 kfree(irq_ptr->output_qs[i]);
1631
1632 }
1633 kfree(irq_ptr->qdr);
40ac6b20 1634 free_page((unsigned long) irq_ptr);
1da177e4
LT		 1635}
1636
1637static void
1638qdio_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
1674static int
1675qdio_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++) {
88abaab4 1683 q = kzalloc(sizeof(struct qdio_q), GFP_KERNEL);
1da177e4
LT		 1684
1685 if (!q) {
1686 QDIO_PRINT_ERR("kmalloc of q failed!\n");
1687 goto out;
1688 }
1689
88abaab4 1690 q->slib = kmalloc(PAGE_SIZE, GFP_KERNEL);
1da177e4
LT		 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++) {
88abaab4 1700 q = kzalloc(sizeof(struct qdio_q), GFP_KERNEL);
1da177e4
LT		 1701
1702 if (!q) {
1703 goto out;
1704 }
1705
1da177e4
LT		 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;
1716out:
1717 return result;
1718}
1719
1720static void
1721qdio_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
78964268 1736 sprintf(dbf_text,"qfqs%4x",cdev->private->schid.sch_no);
1da177e4
LT		 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;
a8237fc4 1756 q->schid = irq_ptr->schid;
1da177e4
LT		 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 */
8129ee16
FP		 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 }
1da177e4
LT		 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;
028cf917
UB		 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;
1da177e4
LT		 1831 q->int_parm=int_parm;
1832 q->is_input_q=0;
a8237fc4 1833 q->schid = irq_ptr->schid;
1da177e4
LT		 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 */
8129ee16
FP		 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 }
1da177e4
LT		 1873 }
1874}
1875
1876static void
1877qdio_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
1912static int
1913tiqdio_thinint_handler(void)
1914{
1915 QDIO_DBF_TEXT4(0,trace,"thin_int");
1916
34249d0f
UB		 1917 if (qdio_performance_stats) {
1918 perf_stats.thinints++;
1919 perf_stats.start_time_inbound=NOW;
1920 }
1da177e4
LT		 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
1932static void
1933qdio_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");
a8237fc4 1940 sprintf(dbf_text,"%4x%4x",irq_ptr->schid.sch_no,state);
1da177e4
LT		 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
4d284cac 1952static void
a8237fc4 1953qdio_irq_check_sense(struct subchannel_id schid, struct irb *irb)
1da177e4
LT		 1954{
1955 char dbf_text[15];
1956
1957 if (irb->esw.esw0.erw.cons) {
a8237fc4 1958 sprintf(dbf_text,"sens%4x",schid.sch_no);
1da177e4
LT		 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");
9163bb2e
UB		 1963 QDIO_HEXDUMP16(WARN,"irb: ",irb);
1964 QDIO_HEXDUMP16(WARN,"sense data: ",irb->ecw);
1da177e4
LT		 1965 }
1966
1967}
1968
4d284cac 1969static void
1da177e4
LT		 1970qdio_handle_pci(struct qdio_irq *irq_ptr)
1971{
1972 int i;
1973 struct qdio_q *q;
1974
34249d0f
UB		 1975 if (qdio_performance_stats) {
1976 perf_stats.pcis++;
1977 perf_stats.start_time_inbound=NOW;
1978 }
1da177e4
LT		 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 {
34249d0f
UB		 1984 if (qdio_performance_stats)
1985 perf_stats.tl_runs--;
1da177e4
LT		 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];
1da177e4
LT		 1993 if (qdio_is_outbound_q_done(q))
1994 continue;
34249d0f
UB		 1995 if (qdio_performance_stats)
1996 perf_stats.tl_runs--;
1da177e4
LT		 1997 if (!irq_ptr->sync_done_on_outb_pcis)
1998 SYNC_MEMORY;
1999 __qdio_outbound_processing(q);
2000 }
2001}
2002
2003static void qdio_establish_handle_irq(struct ccw_device*, int, int);
2004
4d284cac 2005static void
1da177e4
LT		 2006qdio_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);
2036omit_handler_call:
2037 qdio_set_state(irq_ptr,QDIO_IRQ_STATE_STOPPED);
2038
2039}
2040
2041static void
c1637532 2042qdio_call_shutdown(struct work_struct *work)
1da177e4 2043{
c1637532 2044 struct ccw_device_private *priv;
1da177e4
LT		 2045 struct ccw_device *cdev;
2046
c1637532
MS		 2047 priv = container_of(work, struct ccw_device_private, kick_work);
2048 cdev = priv->cdev;
1da177e4
LT		 2049 qdio_shutdown(cdev, QDIO_FLAG_CLEANUP_USING_CLEAR);
2050 put_device(&cdev->dev);
2051}
2052
2053static void
2054qdio_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:
fb6958a5
CH		 2069 QDIO_PRINT_ERR("establish queues on irq 0.%x.%04x: timed out\n",
2070 irq_ptr->schid.ssid, irq_ptr->schid.sch_no);
1da177e4
LT		 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:
fb6958a5
CH		 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);
1da177e4
LT		 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. */
fb6958a5
CH		 2083 QDIO_PRINT_INFO("Queues on irq 0.%x.%04x killed by cio.\n",
2084 irq_ptr->schid.ssid, irq_ptr->schid.sch_no);
1da177e4
LT		 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,
c1637532 2090 qdio_call_shutdown);
1da177e4
LT		 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
2101static void
2102qdio_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
a8237fc4 2147 qdio_irq_check_sense(irq_ptr->schid, irb);
1da177e4
LT		 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
2186int
2187qdio_synchronize(struct ccw_device *cdev, unsigned int flags,
2188 unsigned int queue_number)
2189{
8129ee16 2190 int cc = 0;
1da177e4
LT		 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
a8237fc4 2203 *((int*)(&dbf_text[4])) = irq_ptr->schid.sch_no;
1da177e4
LT		 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;
8129ee16 2214 if (!(irq_ptr->is_qebsm))
a8237fc4 2215 cc = do_siga_sync(q->schid, 0, q->mask);
1da177e4
LT		 2216 } else if (flags&QDIO_FLAG_SYNC_OUTPUT) {
2217 q=irq_ptr->output_qs[queue_number];
2218 if (!q)
2219 return -EINVAL;
8129ee16 2220 if (!(irq_ptr->is_qebsm))
a8237fc4 2221 cc = do_siga_sync(q->schid, q->mask, 0);
1da177e4
LT		 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
4d284cac 2232static void
8129ee16
FP		 2233qdio_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
2270static void
2271qdio_get_ssqd_information(struct qdio_irq *irq_ptr)
1da177e4
LT		 2272{
2273 int result;
2274 unsigned char qdioac;
1da177e4
LT		 2275 struct {
2276 struct chsc_header request;
fb6958a5
CH		 2277 u16 reserved1:10;
2278 u16 ssid:2;
2279 u16 fmt:4;
1da177e4
LT		 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;
8129ee16
FP		 2290 u8 parm;
2291 u8 qdioac1;
1da177e4
LT		 2292 u8 sch_class;
2293 u8 reserved7;
2294 u8 icnt;
2295 u8 reserved8;
2296 u8 ocnt;
8129ee16
FP		 2297 u8 reserved9;
2298 u8 mbccnt;
2299 u16 qdioac2;
2300 u64 sch_token;
1da177e4
LT		 2301 } *ssqd_area;
2302
8129ee16
FP		 2303 QDIO_DBF_TEXT0(0,setup,"getssqd");
2304 qdioac = 0;
a3ae39c0 2305 ssqd_area = mempool_alloc(qdio_mempool_scssc, GFP_ATOMIC);
1da177e4
LT		 2306 if (!ssqd_area) {
2307 QDIO_PRINT_WARN("Could not get memory for chsc. Using all " \
a8237fc4 2308 "SIGAs for sch x%x.\n", irq_ptr->schid.sch_no);
8129ee16
FP		 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;
1da177e4 2316 }
8129ee16 2317
1da177e4
LT		 2318 ssqd_area->request = (struct chsc_header) {
2319 .length = 0x0010,
2320 .code = 0x0024,
2321 };
a8237fc4
CH		 2322 ssqd_area->first_sch = irq_ptr->schid.sch_no;
2323 ssqd_area->last_sch = irq_ptr->schid.sch_no;
fb6958a5 2324 ssqd_area->ssid = irq_ptr->schid.ssid;
8129ee16 2325 result = chsc(ssqd_area);
1da177e4
LT		 2326
2327 if (result) {
2328 QDIO_PRINT_WARN("CHSC returned cc %i. Using all " \
fb6958a5
CH		 2329 "SIGAs for sch 0.%x.%x.\n", result,
2330 irq_ptr->schid.ssid, irq_ptr->schid.sch_no);
1da177e4
LT		 2331 qdioac = CHSC_FLAG_SIGA_INPUT_NECESSARY ||
2332 CHSC_FLAG_SIGA_OUTPUT_NECESSARY ||
2333 CHSC_FLAG_SIGA_SYNC_NECESSARY; /* all flags set */
8129ee16 2334 irq_ptr->is_qebsm = 0;
1da177e4
LT		 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 " \
fb6958a5
CH		 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);
1da177e4
LT		 2343 qdioac = CHSC_FLAG_SIGA_INPUT_NECESSARY ||
2344 CHSC_FLAG_SIGA_OUTPUT_NECESSARY ||
2345 CHSC_FLAG_SIGA_SYNC_NECESSARY; /* all flags set */
8129ee16 2346 irq_ptr->is_qebsm = 0;
1da177e4
LT		 2347 goto out;
2348 }
2349 if (!(ssqd_area->flags & CHSC_FLAG_QDIO_CAPABILITY) ||
2350 !(ssqd_area->flags & CHSC_FLAG_VALIDITY) ||
a8237fc4 2351 (ssqd_area->sch != irq_ptr->schid.sch_no)) {
fb6958a5
CH		 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);
1da177e4
LT		 2355 qdioac = CHSC_FLAG_SIGA_INPUT_NECESSARY |
2356 CHSC_FLAG_SIGA_OUTPUT_NECESSARY |
2357 CHSC_FLAG_SIGA_SYNC_NECESSARY; /* worst case */
8129ee16 2358 irq_ptr->is_qebsm = 0;
1da177e4
LT		 2359 goto out;
2360 }
8129ee16 2361 qdioac = ssqd_area->qdioac1;
1da177e4 2362out:
8129ee16
FP		 2363 qdio_check_subchannel_qebsm(irq_ptr, qdioac,
2364 ssqd_area->sch_token);
a3ae39c0 2365 mempool_free(ssqd_area, qdio_mempool_scssc);
8129ee16 2366 irq_ptr->qdioac = qdioac;
1da177e4
LT		 2367}
2368
2369static unsigned int
2370tiqdio_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
347a8dc3 2397#ifdef CONFIG_64BIT
8129ee16
FP		 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
1da177e4
LT		 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
2413static unsigned int
2414tiqdio_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;
a8237fc4 2440 struct subchannel_id schid;
1da177e4
LT		 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
a3ae39c0 2459 scssc_area = mempool_alloc(qdio_mempool_scssc, GFP_ATOMIC);
1da177e4
LT		 2460 if (!scssc_area) {
2461 QDIO_PRINT_WARN("No memory for setting indicators on " \
fb6958a5
CH		 2462 "subchannel 0.%x.%x.\n",
2463 irq_ptr->schid.ssid, irq_ptr->schid.sch_no);
1da177e4
LT		 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;
a8237fc4 2477 scssc_area->schid = irq_ptr->schid;
1da177e4
LT		 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
1da177e4
LT		 2487 result = chsc(scssc_area);
2488 if (result) {
fb6958a5
CH		 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);
1da177e4
LT		 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;
2514out:
a3ae39c0 2515 mempool_free(scssc_area, qdio_mempool_scssc);
1da177e4
LT		 2516 return result;
2517
2518}
2519
2520static unsigned int
2521tiqdio_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
a3ae39c0 2544 scsscf_area = mempool_alloc(qdio_mempool_scssc, GFP_ATOMIC);
1da177e4
LT		 2545 if (!scsscf_area) {
2546 QDIO_PRINT_WARN("No memory for setting delay target on " \
fb6958a5
CH		 2547 "subchannel 0.%x.%x.\n",
2548 irq_ptr->schid.ssid, irq_ptr->schid.sch_no);
1da177e4
LT		 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) {
fb6958a5
CH		 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,
a8237fc4 2563 result);
1da177e4
LT		 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 */
2581out:
a3ae39c0 2582 mempool_free(scsscf_area, qdio_mempool_scssc);
1da177e4
LT		 2583 return result;
2584}
2585
2586int
2587qdio_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
a8237fc4 2597 sprintf(dbf_text,"qcln%4x",irq_ptr->schid.sch_no);
1da177e4
LT		 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
2607int
2608qdio_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
a8237fc4 2624 sprintf(dbf_text,"qsqs%4x",irq_ptr->schid.sch_no);
1da177e4
LT		 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);
2713out:
2714 up(&irq_ptr->setting_up_sema);
2715 return result;
2716}
2717
2718int
2719qdio_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
a8237fc4 2730 sprintf(dbf_text,"qfqs%4x",irq_ptr->schid.sch_no);
1da177e4
LT		 2731 QDIO_DBF_TEXT1(0,trace,dbf_text);
2732 QDIO_DBF_TEXT0(0,setup,dbf_text);
2733
d2c993d8 2734 cdev->private->qdio_data = NULL;
1da177e4
LT		 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
4d284cac 2743static void
1da177e4
LT		 2744qdio_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
4d284cac 2776static void
1da177e4
LT		 2777qdio_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
4d284cac 2795static void
1da177e4
LT		 2796qdio_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
4d284cac 2816static void
1da177e4
LT		 2817qdio_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
4d284cac 2842static void
1da177e4
LT		 2843qdio_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
4d284cac 2868static int
1da177e4
LT		 2869qdio_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))) {
a8237fc4 2878 sprintf(dbf_text,"ick1%4x",irq_ptr->schid.sch_no);
1da177e4
LT		 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 " \
fb6958a5
CH		 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);
1da177e4
LT		 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));
fb6958a5 2893 QDIO_PRINT_ERR("establish queues on irq 0.%x.%04x: didn't get "
1da177e4 2894 "device end: dstat=%02x, cstat=%02x\n",
fb6958a5
CH		 2895 irq_ptr->schid.ssid, irq_ptr->schid.sch_no,
2896 dstat, cstat);
1da177e4
LT		 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));
fb6958a5 2905 QDIO_PRINT_ERR("establish queues on irq 0.%x.%04x: got "
1da177e4 2906 "the following devstat: dstat=%02x, "
fb6958a5 2907 "cstat=%02x\n", irq_ptr->schid.ssid,
a8237fc4 2908 irq_ptr->schid.sch_no, dstat, cstat);
1da177e4
LT		 2909 qdio_set_state(irq_ptr, QDIO_IRQ_STATE_ERR);
2910 return 1;
2911 }
2912 return 0;
2913}
2914
2915static void
2916qdio_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
78964268 2923 sprintf(dbf_text,"qehi%4x",cdev->private->schid.sch_no);
1da177e4
LT		 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
2936int
2937qdio_initialize(struct qdio_initialize *init_data)
2938{
2939 int rc;
2940 char dbf_text[15];
2941
78964268 2942 sprintf(dbf_text,"qini%4x",init_data->cdev->private->schid.sch_no);
1da177e4
LT		 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
2957int
2958qdio_allocate(struct qdio_initialize *init_data)
2959{
2960 struct qdio_irq *irq_ptr;
2961 char dbf_text[15];
2962
78964268 2963 sprintf(dbf_text,"qalc%4x",init_data->cdev->private->schid.sch_no);
1da177e4
LT		 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 */
40ac6b20 2981 irq_ptr = (void *) get_zeroed_page(GFP_KERNEL | GFP_DMA);
1da177e4
LT		 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
1da177e4
LT		 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)) {
40ac6b20 2996 free_page((unsigned long) irq_ptr);
1da177e4
LT		 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
2b67fc46 3017static int qdio_fill_irq(struct qdio_initialize *init_data)
1da177e4
LT		 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
a8237fc4 3034 irq_ptr->schid = ccw_device_get_subchannel_id(init_data->cdev);
1da177e4
LT		 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) {
8129ee16 3050 irq_ptr->dev_st_chg_ind = qdio_get_indicator();
1da177e4
LT		 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 " \
fb6958a5
CH		 3054 "for irq 0.%x.%x\n",
3055 irq_ptr->schid.ssid, irq_ptr->schid.sch_no);
1da177e4
LT		 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 */
8129ee16
FP		 3100 irq_ptr->is_qebsm = is_passthrough;
3101 if (irq_ptr->is_qebsm)
3102 irq_ptr->qib.rflags |= QIB_RFLAGS_ENABLE_QEBSM;
3103
1da177e4
LT		 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
3153int
3154qdio_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
78964268 3186 sprintf(dbf_text,"qest%4x",cdev->private->schid.sch_no);
1da177e4
LT		 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
4dd3cc5c 3198 ccw_device_set_options_mask(cdev, 0);
1da177e4
LT		 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 }
fb6958a5
CH		 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);
1da177e4
LT		 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
cdb32dc9
UBK		 3229 /* Timeout is cared for already by using ccw_device_start_timeout(). */
3230 wait_event_interruptible(cdev->private->wait_q,
1da177e4 3231 irq_ptr->state == QDIO_IRQ_STATE_ESTABLISHED ||
cdb32dc9 3232 irq_ptr->state == QDIO_IRQ_STATE_ERR);
1da177e4
LT		 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
8129ee16 3242 qdio_get_ssqd_information(irq_ptr);
1da177e4
LT		 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
3267int
3268qdio_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
a8237fc4 3288 sprintf(dbf_text,"qact%4x", irq_ptr->schid.sch_no);
1da177e4
LT		 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 }
fb6958a5
CH		 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);
1da177e4
LT		 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 */
4d284cac 3370static void
1da177e4
LT		 3371qdio_do_qdio_fill_input(struct qdio_q *q, unsigned int qidx,
3372 unsigned int count, struct qdio_buffer *buffers)
3373{
8129ee16 3374 struct qdio_irq *irq = (struct qdio_irq *) q->irq_ptr;
dcc49d46
UB		 3375 int tmp = 0;
3376
8129ee16
FP		 3377 qidx &= (QDIO_MAX_BUFFERS_PER_Q - 1);
3378 if (irq->is_qebsm) {
dcc49d46
UB		 3379 while (count) {
3380 tmp = set_slsb(q, &qidx, SLSB_CU_INPUT_EMPTY, &count);
3381 if (!tmp)
3382 return;
3383 }
8129ee16
FP		 3384 return;
3385 }
1da177e4 3386 for (;;) {
8129ee16 3387 set_slsb(q, &qidx, SLSB_CU_INPUT_EMPTY, &count);
1da177e4
LT		 3388 count--;
3389 if (!count) break;
8129ee16 3390 qidx = (qidx + 1) & (QDIO_MAX_BUFFERS_PER_Q - 1);
1da177e4 3391 }
1da177e4
LT		 3392}
3393
4d284cac 3394static void
1da177e4
LT		 3395qdio_do_qdio_fill_output(struct qdio_q *q, unsigned int qidx,
3396 unsigned int count, struct qdio_buffer *buffers)
3397{
8129ee16 3398 struct qdio_irq *irq = (struct qdio_irq *) q->irq_ptr;
dcc49d46 3399 int tmp = 0;
8129ee16
FP		 3400
3401 qidx &= (QDIO_MAX_BUFFERS_PER_Q - 1);
3402 if (irq->is_qebsm) {
dcc49d46
UB		 3403 while (count) {
3404 tmp = set_slsb(q, &qidx, SLSB_CU_OUTPUT_PRIMED, &count);
3405 if (!tmp)
3406 return;
3407 }
8129ee16
FP		 3408 return;
3409 }
3410
1da177e4 3411 for (;;) {
8129ee16 3412 set_slsb(q, &qidx, SLSB_CU_OUTPUT_PRIMED, &count);
1da177e4
LT		 3413 count--;
3414 if (!count) break;
8129ee16 3415 qidx = (qidx + 1) & (QDIO_MAX_BUFFERS_PER_Q - 1);
1da177e4 3416 }
1da177e4
LT		 3417}
3418
4d284cac 3419static void
1da177e4
LT		 3420do_qdio_handle_inbound(struct qdio_q *q, unsigned int callflags,
3421 unsigned int qidx, unsigned int count,
3422 struct qdio_buffer *buffers)
3423{
3424 int used_elements;
3425
3426 /* This is the inbound handling of queues */
3427 used_elements=atomic_add_return(count, &q->number_of_buffers_used) - count;
3428
3429 qdio_do_qdio_fill_input(q,qidx,count,buffers);
3430
3431 if ((used_elements+count==QDIO_MAX_BUFFERS_PER_Q)&&
3432 (callflags&QDIO_FLAG_UNDER_INTERRUPT))
9163bb2e 3433 atomic_xchg(&q->polling,0);
1da177e4
LT		 3434
3435 if (used_elements)
3436 return;
3437 if (callflags&QDIO_FLAG_DONT_SIGA)
3438 return;
3439 if (q->siga_in) {
3440 int result;
3441
3442 result=qdio_siga_input(q);
3443 if (result) {
3444 if (q->siga_error)
3445 q->error_status_flags|=
3446 QDIO_STATUS_MORE_THAN_ONE_SIGA_ERROR;
3447 q->error_status_flags|=QDIO_STATUS_LOOK_FOR_ERROR;
3448 q->siga_error=result;
3449 }
3450 }
3451
3452 qdio_mark_q(q);
3453}
3454
4d284cac 3455static void
1da177e4
LT		 3456do_qdio_handle_outbound(struct qdio_q *q, unsigned int callflags,
3457 unsigned int qidx, unsigned int count,
3458 struct qdio_buffer *buffers)
3459{
3460 int used_elements;
8129ee16
FP		 3461 unsigned int cnt, start_buf;
3462 unsigned char state = 0;
3463 struct qdio_irq *irq = (struct qdio_irq *) q->irq_ptr;
1da177e4
LT		 3464
3465 /* This is the outbound handling of queues */
34249d0f
UB		 3466 if (qdio_performance_stats)
3467 perf_stats.start_time_outbound=NOW;
1da177e4
LT		 3468
3469 qdio_do_qdio_fill_output(q,qidx,count,buffers);
3470
3471 used_elements=atomic_add_return(count, &q->number_of_buffers_used) - count;
3472
3473 if (callflags&QDIO_FLAG_DONT_SIGA) {
34249d0f
UB		 3474 if (qdio_performance_stats) {
3475 perf_stats.outbound_time+=NOW-perf_stats.start_time_outbound;
3476 perf_stats.outbound_cnt++;
3477 }
1da177e4
LT		 3478 return;
3479 }
3480 if (q->is_iqdio_q) {
3481 /* one siga for every sbal */
3482 while (count--)
3483 qdio_kick_outbound_q(q);
3484
3485 __qdio_outbound_processing(q);
3486 } else {
3487 /* under VM, we do a SIGA sync unconditionally */
3488 SYNC_MEMORY;
3489 else {
3490 /*
3491 * w/o shadow queues (else branch of
3492 * SYNC_MEMORY :-/ ), we try to
3493 * fast-requeue buffers
3494 */
8129ee16
FP		 3495 if (irq->is_qebsm) {
3496 cnt = 1;
3497 start_buf = ((qidx+QDIO_MAX_BUFFERS_PER_Q-1) &
3498 (QDIO_MAX_BUFFERS_PER_Q-1));
3499 qdio_do_eqbs(q, &state, &start_buf, &cnt);
3500 } else
3501 state = q->slsb.acc.val[(qidx+QDIO_MAX_BUFFERS_PER_Q-1)
3502 &(QDIO_MAX_BUFFERS_PER_Q-1) ];
3503 if (state != SLSB_CU_OUTPUT_PRIMED) {
1da177e4
LT		 3504 qdio_kick_outbound_q(q);
3505 } else {
3506 QDIO_DBF_TEXT3(0,trace, "fast-req");
34249d0f
UB		 3507 if (qdio_performance_stats)
3508 perf_stats.fast_reqs++;
1da177e4
LT		 3509 }
3510 }
3511 /*
3512 * only marking the q could take too long,
3513 * the upper layer module could do a lot of
3514 * traffic in that time
3515 */
3516 __qdio_outbound_processing(q);
3517 }
3518
34249d0f
UB		 3519 if (qdio_performance_stats) {
3520 perf_stats.outbound_time+=NOW-perf_stats.start_time_outbound;
3521 perf_stats.outbound_cnt++;
3522 }
1da177e4
LT		 3523}
3524
3525/* count must be 1 in iqdio */
3526int
3527do_QDIO(struct ccw_device *cdev,unsigned int callflags,
3528 unsigned int queue_number, unsigned int qidx,
3529 unsigned int count,struct qdio_buffer *buffers)
3530{
3531 struct qdio_irq *irq_ptr;
3532#ifdef CONFIG_QDIO_DEBUG
3533 char dbf_text[20];
3534
85a4aa64 3535 sprintf(dbf_text,"doQD%04x",cdev->private->schid.sch_no);
1da177e4
LT		 3536 QDIO_DBF_TEXT3(0,trace,dbf_text);
3537#endif /* CONFIG_QDIO_DEBUG */
3538
3539 if ( (qidx>QDIO_MAX_BUFFERS_PER_Q) ||
3540 (count>QDIO_MAX_BUFFERS_PER_Q) ||
3541 (queue_number>QDIO_MAX_QUEUES_PER_IRQ) )
3542 return -EINVAL;
3543
3544 if (count==0)
3545 return 0;
3546
3547 irq_ptr = cdev->private->qdio_data;
3548 if (!irq_ptr)
3549 return -ENODEV;
3550
3551#ifdef CONFIG_QDIO_DEBUG
3552 if (callflags&QDIO_FLAG_SYNC_INPUT)
3553 QDIO_DBF_HEX3(0,trace,&irq_ptr->input_qs[queue_number],
3554 sizeof(void*));
3555 else
3556 QDIO_DBF_HEX3(0,trace,&irq_ptr->output_qs[queue_number],
3557 sizeof(void*));
3558 sprintf(dbf_text,"flag%04x",callflags);
3559 QDIO_DBF_TEXT3(0,trace,dbf_text);
3560 sprintf(dbf_text,"qi%02xct%02x",qidx,count);
3561 QDIO_DBF_TEXT3(0,trace,dbf_text);
3562#endif /* CONFIG_QDIO_DEBUG */
3563
3564 if (irq_ptr->state!=QDIO_IRQ_STATE_ACTIVE)
3565 return -EBUSY;
3566
3567 if (callflags&QDIO_FLAG_SYNC_INPUT)
3568 do_qdio_handle_inbound(irq_ptr->input_qs[queue_number],
3569 callflags, qidx, count, buffers);
3570 else if (callflags&QDIO_FLAG_SYNC_OUTPUT)
3571 do_qdio_handle_outbound(irq_ptr->output_qs[queue_number],
3572 callflags, qidx, count, buffers);
3573 else {
3574 QDIO_DBF_TEXT3(1,trace,"doQD:inv");
3575 return -EINVAL;
3576 }
3577 return 0;
3578}
3579
1da177e4
LT		 3580static int
3581qdio_perf_procfile_read(char *buffer, char **buffer_location, off_t offset,
3582 int buffer_length, int *eof, void *data)
3583{
3584 int c=0;
3585
3586 /* we are always called with buffer_length=4k, so we all
3587 deliver on the first read */
3588 if (offset>0)
3589 return 0;
3590
3591#define _OUTP_IT(x...) c+=sprintf(buffer+c,x)
3592 _OUTP_IT("i_p_nc/c=%lu/%lu\n",i_p_nc,i_p_c);
3593 _OUTP_IT("ii_p_nc/c=%lu/%lu\n",ii_p_nc,ii_p_c);
3594 _OUTP_IT("o_p_nc/c=%lu/%lu\n",o_p_nc,o_p_c);
34249d0f 3595 _OUTP_IT("Number of tasklet runs (total) : %lu\n",
1da177e4
LT		 3596 perf_stats.tl_runs);
3597 _OUTP_IT("\n");
34249d0f 3598 _OUTP_IT("Number of SIGA sync's issued : %lu\n",
1da177e4 3599 perf_stats.siga_syncs);
34249d0f 3600 _OUTP_IT("Number of SIGA in's issued : %lu\n",
1da177e4 3601 perf_stats.siga_ins);
34249d0f 3602 _OUTP_IT("Number of SIGA out's issued : %lu\n",
1da177e4 3603 perf_stats.siga_outs);
34249d0f 3604 _OUTP_IT("Number of PCIs caught : %lu\n",
1da177e4 3605 perf_stats.pcis);
34249d0f 3606 _OUTP_IT("Number of adapter interrupts caught : %lu\n",
1da177e4 3607 perf_stats.thinints);
34249d0f 3608 _OUTP_IT("Number of fast requeues (outg. SBALs w/o SIGA) : %lu\n",
1da177e4
LT		 3609 perf_stats.fast_reqs);
3610 _OUTP_IT("\n");
34249d0f 3611 _OUTP_IT("Total time of all inbound actions (us) incl. UL : %lu\n",
1da177e4 3612 perf_stats.inbound_time);
34249d0f 3613 _OUTP_IT("Number of inbound transfers : %lu\n",
1da177e4 3614 perf_stats.inbound_cnt);
34249d0f 3615 _OUTP_IT("Total time of all outbound do_QDIOs (us) : %lu\n",
1da177e4 3616 perf_stats.outbound_time);
34249d0f 3617 _OUTP_IT("Number of do_QDIOs outbound : %lu\n",
1da177e4
LT		 3618 perf_stats.outbound_cnt);
3619 _OUTP_IT("\n");
3620
3621 return c;
3622}
3623
3624static struct proc_dir_entry *qdio_perf_proc_file;
1da177e4
LT		 3625
3626static void
3627qdio_add_procfs_entry(void)
3628{
1da177e4
LT		 3629 proc_perf_file_registration=0;
3630 qdio_perf_proc_file=create_proc_entry(QDIO_PERF,
3631 S_IFREG|0444,&proc_root);
3632 if (qdio_perf_proc_file) {
3633 qdio_perf_proc_file->read_proc=&qdio_perf_procfile_read;
3634 } else proc_perf_file_registration=-1;
3635
3636 if (proc_perf_file_registration)
3637 QDIO_PRINT_WARN("was not able to register perf. " \
3638 "proc-file (%i).\n",
3639 proc_perf_file_registration);
1da177e4
LT		 3640}
3641
3642static void
3643qdio_remove_procfs_entry(void)
3644{
1da177e4
LT		 3645 perf_stats.tl_runs=0;
3646
3647 if (!proc_perf_file_registration) /* means if it went ok earlier */
3648 remove_proc_entry(QDIO_PERF,&proc_root);
1da177e4
LT		 3649}
3650
34249d0f
UB		 3651/**
3652 * attributes in sysfs
3653 *****************************************************************************/
3654
3655static ssize_t
3656qdio_performance_stats_show(struct bus_type *bus, char *buf)
3657{
3658 return sprintf(buf, "%i\n", qdio_performance_stats ? 1 : 0);
3659}
3660
3661static ssize_t
3662qdio_performance_stats_store(struct bus_type *bus, const char *buf, size_t count)
3663{
3664 char *tmp;
3665 int i;
3666
3667 i = simple_strtoul(buf, &tmp, 16);
3668 if ((i == 0) || (i == 1)) {
3669 if (i == qdio_performance_stats)
3670 return count;
3671 qdio_performance_stats = i;
3672 if (i==0) {
3673 /* reset perf. stat. info */
3674 i_p_nc = 0;
3675 i_p_c = 0;
3676 ii_p_nc = 0;
3677 ii_p_c = 0;
3678 o_p_nc = 0;
3679 o_p_c = 0;
3680 memset(&perf_stats, 0, sizeof(struct qdio_perf_stats));
3681 }
3682 } else {
3683 QDIO_PRINT_WARN("QDIO performance_stats: write 0 or 1 to this file!\n");
3684 return -EINVAL;
3685 }
3686 return count;
3687}
3688
3689static BUS_ATTR(qdio_performance_stats, 0644, qdio_performance_stats_show,
3690 qdio_performance_stats_store);
3691
1da177e4
LT		 3692static void
3693tiqdio_register_thinints(void)
3694{
3695 char dbf_text[20];
3696 register_thinint_result=
3697 s390_register_adapter_interrupt(&tiqdio_thinint_handler);
3698 if (register_thinint_result) {
3699 sprintf(dbf_text,"regthn%x",(register_thinint_result&0xff));
3700 QDIO_DBF_TEXT0(0,setup,dbf_text);
3701 QDIO_PRINT_ERR("failed to register adapter handler " \
3702 "(rc=%i).\nAdapter interrupts might " \
3703 "not work. Continuing.\n",
3704 register_thinint_result);
3705 }
3706}
3707
3708static void
3709tiqdio_unregister_thinints(void)
3710{
3711 if (!register_thinint_result)
3712 s390_unregister_adapter_interrupt(&tiqdio_thinint_handler);
3713}
3714
3715static int
3716qdio_get_qdio_memory(void)
3717{
3718 int i;
3719 indicator_used[0]=1;
3720
3721 for (i=1;i<INDICATORS_PER_CACHELINE;i++)
3722 indicator_used[i]=0;
88abaab4 3723 indicators = kzalloc(sizeof(__u32)*(INDICATORS_PER_CACHELINE),
1da177e4 3724 GFP_KERNEL);
88abaab4
ES		 3725 if (!indicators)
3726 return -ENOMEM;
1da177e4
LT		 3727 return 0;
3728}
3729
3730static void
3731qdio_release_qdio_memory(void)
3732{
17fd682e 3733 kfree(indicators);
1da177e4
LT		 3734}
3735
34249d0f 3736
1da177e4
LT		 3737static void
3738qdio_unregister_dbf_views(void)
3739{
3740 if (qdio_dbf_setup)
3741 debug_unregister(qdio_dbf_setup);
3742 if (qdio_dbf_sbal)
3743 debug_unregister(qdio_dbf_sbal);
3744 if (qdio_dbf_sense)
3745 debug_unregister(qdio_dbf_sense);
3746 if (qdio_dbf_trace)
3747 debug_unregister(qdio_dbf_trace);
3748#ifdef CONFIG_QDIO_DEBUG
3749 if (qdio_dbf_slsb_out)
3750 debug_unregister(qdio_dbf_slsb_out);
3751 if (qdio_dbf_slsb_in)
3752 debug_unregister(qdio_dbf_slsb_in);
3753#endif /* CONFIG_QDIO_DEBUG */
3754}
3755
3756static int
3757qdio_register_dbf_views(void)
3758{
3759 qdio_dbf_setup=debug_register(QDIO_DBF_SETUP_NAME,
66a464db 3760 QDIO_DBF_SETUP_PAGES,
1da177e4
LT		 3761 QDIO_DBF_SETUP_NR_AREAS,
3762 QDIO_DBF_SETUP_LEN);
3763 if (!qdio_dbf_setup)
3764 goto oom;
3765 debug_register_view(qdio_dbf_setup,&debug_hex_ascii_view);
3766 debug_set_level(qdio_dbf_setup,QDIO_DBF_SETUP_LEVEL);
3767
3768 qdio_dbf_sbal=debug_register(QDIO_DBF_SBAL_NAME,
66a464db 3769 QDIO_DBF_SBAL_PAGES,
1da177e4
LT		 3770 QDIO_DBF_SBAL_NR_AREAS,
3771 QDIO_DBF_SBAL_LEN);
3772 if (!qdio_dbf_sbal)
3773 goto oom;
3774
3775 debug_register_view(qdio_dbf_sbal,&debug_hex_ascii_view);
3776 debug_set_level(qdio_dbf_sbal,QDIO_DBF_SBAL_LEVEL);
3777
3778 qdio_dbf_sense=debug_register(QDIO_DBF_SENSE_NAME,
66a464db 3779 QDIO_DBF_SENSE_PAGES,
1da177e4
LT		 3780 QDIO_DBF_SENSE_NR_AREAS,
3781 QDIO_DBF_SENSE_LEN);
3782 if (!qdio_dbf_sense)
3783 goto oom;
3784
3785 debug_register_view(qdio_dbf_sense,&debug_hex_ascii_view);
3786 debug_set_level(qdio_dbf_sense,QDIO_DBF_SENSE_LEVEL);
3787
3788 qdio_dbf_trace=debug_register(QDIO_DBF_TRACE_NAME,
66a464db 3789 QDIO_DBF_TRACE_PAGES,
1da177e4
LT		 3790 QDIO_DBF_TRACE_NR_AREAS,
3791 QDIO_DBF_TRACE_LEN);
3792 if (!qdio_dbf_trace)
3793 goto oom;
3794
3795 debug_register_view(qdio_dbf_trace,&debug_hex_ascii_view);
3796 debug_set_level(qdio_dbf_trace,QDIO_DBF_TRACE_LEVEL);
3797
3798#ifdef CONFIG_QDIO_DEBUG
3799 qdio_dbf_slsb_out=debug_register(QDIO_DBF_SLSB_OUT_NAME,
66a464db 3800 QDIO_DBF_SLSB_OUT_PAGES,
1da177e4
LT		 3801 QDIO_DBF_SLSB_OUT_NR_AREAS,
3802 QDIO_DBF_SLSB_OUT_LEN);
3803 if (!qdio_dbf_slsb_out)
3804 goto oom;
3805 debug_register_view(qdio_dbf_slsb_out,&debug_hex_ascii_view);
3806 debug_set_level(qdio_dbf_slsb_out,QDIO_DBF_SLSB_OUT_LEVEL);
3807
3808 qdio_dbf_slsb_in=debug_register(QDIO_DBF_SLSB_IN_NAME,
66a464db 3809 QDIO_DBF_SLSB_IN_PAGES,
1da177e4
LT		 3810 QDIO_DBF_SLSB_IN_NR_AREAS,
3811 QDIO_DBF_SLSB_IN_LEN);
3812 if (!qdio_dbf_slsb_in)
3813 goto oom;
3814 debug_register_view(qdio_dbf_slsb_in,&debug_hex_ascii_view);
3815 debug_set_level(qdio_dbf_slsb_in,QDIO_DBF_SLSB_IN_LEVEL);
3816#endif /* CONFIG_QDIO_DEBUG */
3817 return 0;
3818oom:
3819 QDIO_PRINT_ERR("not enough memory for dbf.\n");
3820 qdio_unregister_dbf_views();
3821 return -ENOMEM;
3822}
3823
a3ae39c0
AH		 3824static void *qdio_mempool_alloc(gfp_t gfp_mask, void *size)
3825{
3826 return (void *) get_zeroed_page(gfp_mask|GFP_DMA);
3827}
3828
3829static void qdio_mempool_free(void *element, void *size)
3830{
3831 free_page((unsigned long) element);
3832}
3833
1da177e4
LT		 3834static int __init
3835init_QDIO(void)
3836{
3837 int res;
1da177e4 3838 void *ptr;
1da177e4
LT		 3839
3840 printk("qdio: loading %s\n",version);
3841
3842 res=qdio_get_qdio_memory();
3843 if (res)
3844 return res;
3845
3846 res = qdio_register_dbf_views();
3847 if (res)
3848 return res;
3849
3850 QDIO_DBF_TEXT0(0,setup,"initQDIO");
34249d0f 3851 res = bus_create_file(&ccw_bus_type, &bus_attr_qdio_performance_stats);
1da177e4 3852
34249d0f 3853 memset((void*)&perf_stats,0,sizeof(perf_stats));
1da177e4
LT		 3854 QDIO_DBF_TEXT0(0,setup,"perfstat");
3855 ptr=&perf_stats;
3856 QDIO_DBF_HEX0(0,setup,&ptr,sizeof(void*));
1da177e4
LT		 3857
3858 qdio_add_procfs_entry();
3859
a3ae39c0
AH		 3860 qdio_mempool_scssc = mempool_create(QDIO_MEMPOOL_SCSSC_ELEMENTS,
3861 qdio_mempool_alloc,
3862 qdio_mempool_free, NULL);
3863
1da177e4
LT		 3864 if (tiqdio_check_chsc_availability())
3865 QDIO_PRINT_ERR("Not all CHSCs supported. Continuing.\n");
3866
3867 tiqdio_register_thinints();
3868
3869 return 0;
3870 }
3871
3872static void __exit
3873cleanup_QDIO(void)
3874{
3875 tiqdio_unregister_thinints();
3876 qdio_remove_procfs_entry();
3877 qdio_release_qdio_memory();
3878 qdio_unregister_dbf_views();
a3ae39c0 3879 mempool_destroy(qdio_mempool_scssc);
34249d0f 3880 bus_remove_file(&ccw_bus_type, &bus_attr_qdio_performance_stats);
1da177e4
LT		 3881 printk("qdio: %s: module removed\n",version);
3882}
3883
3884module_init(init_QDIO);
3885module_exit(cleanup_QDIO);
3886
3887EXPORT_SYMBOL(qdio_allocate);
3888EXPORT_SYMBOL(qdio_establish);
3889EXPORT_SYMBOL(qdio_initialize);
3890EXPORT_SYMBOL(qdio_activate);
3891EXPORT_SYMBOL(do_QDIO);
3892EXPORT_SYMBOL(qdio_shutdown);
3893EXPORT_SYMBOL(qdio_free);
3894EXPORT_SYMBOL(qdio_cleanup);
3895EXPORT_SYMBOL(qdio_synchronize);
Linux 6.x block layer and io_uring tree(s)