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   1 /*
   2  *
   3  * linux/drivers/s390/cio/qdio.c
   4  *
   5  * Linux for S/390 QDIO base support, Hipersocket base support
   6  * version 2
   7  *
   8  * Copyright 2000,2002 IBM Corporation
   9  * Author(s):             Utz Bacher <utz.bacher@de.ibm.com>
  10  * 2.6 cio integration by Cornelia Huck <cornelia.huck@de.ibm.com>
  11  *
  12  * Restriction: only 63 iqdio subchannels would have its own indicator,
  13  * after that, subsequent subchannels share one indicator
  14  *
  15  *
  16  *
  17  *
  18  * This program is free software; you can redistribute it and/or modify
  19  * it under the terms of the GNU General Public License as published by
  20  * the Free Software Foundation; either version 2, or (at your option)
  21  * any later version.
  22  *
  23  * This program is distributed in the hope that it will be useful,
  24  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  25  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  26  * GNU General Public License for more details.
  27  *
  28  * You should have received a copy of the GNU General Public License
  29  * along with this program; if not, write to the Free Software
  30  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  31  */
  32
  33 #include <linux/module.h>
  34 #include <linux/init.h>
  35
  36 #include <linux/slab.h>
  37 #include <linux/kernel.h>
  38 #include <linux/proc_fs.h>
  39 #include <linux/timer.h>
  40 #include <linux/mempool.h>
  41
  42 #include <asm/ccwdev.h>
  43 #include <asm/io.h>
  44 #include <asm/atomic.h>
  45 #include <asm/semaphore.h>
  46 #include <asm/timex.h>
  47
  48 #include <asm/debug.h>
  49 #include <asm/s390_rdev.h>
  50 #include <asm/qdio.h>
  51
  52 #include "cio.h"
  53 #include "css.h"
  54 #include "device.h"
  55 #include "airq.h"
  56 #include "qdio.h"
  57 #include "ioasm.h"
  58 #include "chsc.h"
  59
  60 /****************** MODULE PARAMETER VARIABLES ********************/
  61 MODULE_AUTHOR("Utz Bacher <utz.bacher@de.ibm.com>");
  62 MODULE_DESCRIPTION("QDIO base support version 2, " \
  63                    "Copyright 2000 IBM Corporation");
  64 MODULE_LICENSE("GPL");
  65
  66 /******************** HERE WE GO ***********************************/
  67
  68 static const char version[] = "QDIO base support version 2";
  69
  70 static int qdio_performance_stats = 0;
  71 static int proc_perf_file_registration;
  72 static struct qdio_perf_stats perf_stats;
  73
  74 static int hydra_thinints;
  75 static int is_passthrough = 0;
  76 static int omit_svs;
  77
  78 static int indicator_used[INDICATORS_PER_CACHELINE];
  79 static __u32 * volatile indicators;
  80 static __u32 volatile spare_indicator;
  81 static atomic_t spare_indicator_usecount;
  82 #define QDIO_MEMPOOL_SCSSC_ELEMENTS 2
  83 static mempool_t *qdio_mempool_scssc;
  84 static struct kmem_cache *qdio_q_cache;
  85
  86 static debug_info_t *qdio_dbf_setup;
  87 static debug_info_t *qdio_dbf_sbal;
  88 static debug_info_t *qdio_dbf_trace;
  89 static debug_info_t *qdio_dbf_sense;
  90 #ifdef CONFIG_QDIO_DEBUG
  91 static debug_info_t *qdio_dbf_slsb_out;
  92 static debug_info_t *qdio_dbf_slsb_in;
  93 #endif /* CONFIG_QDIO_DEBUG */
  94
  95 /* iQDIO stuff: */
  96 static volatile struct qdio_q *tiq_list=NULL; /* volatile as it could change
  97                                                  during a while loop */
  98 static DEFINE_SPINLOCK(ttiq_list_lock);
  99 static int register_thinint_result;
 100 static void tiqdio_tl(unsigned long);
 101 static DECLARE_TASKLET(tiqdio_tasklet,tiqdio_tl,0);
 102
 103 /* not a macro, as one of the arguments is atomic_read */
 104 static inline int
 105 qdio_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 #ifdef CONFIG_64BIT
 115 static inline void qdio_perf_stat_inc(atomic64_t *count)
 116 {
 117         if (qdio_performance_stats)
 118                 atomic64_inc(count);
 119 }
 120
 121 static inline void qdio_perf_stat_dec(atomic64_t *count)
 122 {
 123         if (qdio_performance_stats)
 124                 atomic64_dec(count);
 125 }
 126 #else /* CONFIG_64BIT */
 127 static inline void qdio_perf_stat_inc(atomic_t *count)
 128 {
 129         if (qdio_performance_stats)
 130                 atomic_inc(count);
 131 }
 132
 133 static inline void qdio_perf_stat_dec(atomic_t *count)
 134 {
 135         if (qdio_performance_stats)
 136                 atomic_dec(count);
 137 }
 138 #endif /* CONFIG_64BIT */
 139
 140 static inline __u64
 141 qdio_get_micros(void)
 142 {
 143         return (get_clock() >> 12); /* time>>12 is microseconds */
 144 }
 145
 146 /*
 147  * unfortunately, we can't just xchg the values; in do_QDIO we want to reserve
 148  * the q in any case, so that we'll not be interrupted when we are in
 149  * qdio_mark_tiq... shouldn't have a really bad impact, as reserving almost
 150  * ever works (last famous words)
 151  */
 152 static inline int
 153 qdio_reserve_q(struct qdio_q *q)
 154 {
 155         return atomic_add_return(1,&q->use_count) - 1;
 156 }
 157
 158 static inline void
 159 qdio_release_q(struct qdio_q *q)
 160 {
 161         atomic_dec(&q->use_count);
 162 }
 163
 164 /*check ccq  */
 165 static int
 166 qdio_check_ccq(struct qdio_q *q, unsigned int ccq)
 167 {
 168         char dbf_text[15];
 169
 170         if (ccq == 0 || ccq == 32)
 171                 return 0;
 172         if (ccq == 96 || ccq == 97)
 173                 return 1;
 174         /*notify devices immediately*/
 175         sprintf(dbf_text,"%d", ccq);
 176         QDIO_DBF_TEXT2(1,trace,dbf_text);
 177         return -EIO;
 178 }
 179 /* EQBS: extract buffer states */
 180 static int
 181 qdio_do_eqbs(struct qdio_q *q, unsigned char *state,
 182              unsigned int *start, unsigned int *cnt)
 183 {
 184         struct qdio_irq *irq;
 185         unsigned int tmp_cnt, q_no, ccq;
 186         int rc ;
 187         char dbf_text[15];
 188
 189         ccq = 0;
 190         tmp_cnt = *cnt;
 191         irq = (struct qdio_irq*)q->irq_ptr;
 192         q_no = q->q_no;
 193         if(!q->is_input_q)
 194                 q_no += irq->no_input_qs;
 195 again:
 196         ccq = do_eqbs(irq->sch_token, state, q_no, start, cnt);
 197         rc = qdio_check_ccq(q, ccq);
 198         if ((ccq == 96) && (tmp_cnt != *cnt))
 199                 rc = 0;
 200         if (rc == 1) {
 201                 QDIO_DBF_TEXT5(1,trace,"eqAGAIN");
 202                 goto again;
 203         }
 204         if (rc < 0) {
 205                 QDIO_DBF_TEXT2(1,trace,"eqberr");
 206                 sprintf(dbf_text,"%2x,%2x,%d,%d",tmp_cnt, *cnt, ccq, q_no);
 207                 QDIO_DBF_TEXT2(1,trace,dbf_text);
 208                 q->handler(q->cdev,QDIO_STATUS_ACTIVATE_CHECK_CONDITION|
 209                                 QDIO_STATUS_LOOK_FOR_ERROR,
 210                                 0, 0, 0, -1, -1, q->int_parm);
 211                 return 0;
 212         }
 213         return (tmp_cnt - *cnt);
 214 }
 215
 216 /* SQBS: set buffer states */
 217 static int
 218 qdio_do_sqbs(struct qdio_q *q, unsigned char state,
 219              unsigned int *start, unsigned int *cnt)
 220 {
 221         struct qdio_irq *irq;
 222         unsigned int tmp_cnt, q_no, ccq;
 223         int rc;
 224         char dbf_text[15];
 225
 226         ccq = 0;
 227         tmp_cnt = *cnt;
 228         irq = (struct qdio_irq*)q->irq_ptr;
 229         q_no = q->q_no;
 230         if(!q->is_input_q)
 231                 q_no += irq->no_input_qs;
 232 again:
 233         ccq = do_sqbs(irq->sch_token, state, q_no, start, cnt);
 234         rc = qdio_check_ccq(q, ccq);
 235         if (rc == 1) {
 236                 QDIO_DBF_TEXT5(1,trace,"sqAGAIN");
 237                 goto again;
 238         }
 239         if (rc < 0) {
 240                 QDIO_DBF_TEXT3(1,trace,"sqberr");
 241                 sprintf(dbf_text,"%2x,%2x",tmp_cnt,*cnt);
 242                 QDIO_DBF_TEXT3(1,trace,dbf_text);
 243                 sprintf(dbf_text,"%d,%d",ccq,q_no);
 244                 QDIO_DBF_TEXT3(1,trace,dbf_text);
 245                 q->handler(q->cdev,QDIO_STATUS_ACTIVATE_CHECK_CONDITION|
 246                                 QDIO_STATUS_LOOK_FOR_ERROR,
 247                                 0, 0, 0, -1, -1, q->int_parm);
 248                 return 0;
 249         }
 250         return (tmp_cnt - *cnt);
 251 }
 252
 253 static inline int
 254 qdio_set_slsb(struct qdio_q *q, unsigned int *bufno,
 255               unsigned char state, unsigned int *count)
 256 {
 257         volatile char *slsb;
 258         struct qdio_irq *irq;
 259
 260         irq = (struct qdio_irq*)q->irq_ptr;
 261         if (!irq->is_qebsm) {
 262                 slsb = (char *)&q->slsb.acc.val[(*bufno)];
 263                 xchg(slsb, state);
 264                 return 1;
 265         }
 266         return qdio_do_sqbs(q, state, bufno, count);
 267 }
 268
 269 #ifdef CONFIG_QDIO_DEBUG
 270 static inline void
 271 qdio_trace_slsb(struct qdio_q *q)
 272 {
 273         if (q->queue_type==QDIO_TRACE_QTYPE) {
 274                 if (q->is_input_q)
 275                         QDIO_DBF_HEX2(0,slsb_in,&q->slsb,
 276                                       QDIO_MAX_BUFFERS_PER_Q);
 277                 else
 278                         QDIO_DBF_HEX2(0,slsb_out,&q->slsb,
 279                                       QDIO_MAX_BUFFERS_PER_Q);
 280         }
 281 }
 282 #endif
 283
 284 static inline int
 285 set_slsb(struct qdio_q *q, unsigned int *bufno,
 286          unsigned char state, unsigned int *count)
 287 {
 288         int rc;
 289 #ifdef CONFIG_QDIO_DEBUG
 290         qdio_trace_slsb(q);
 291 #endif
 292         rc = qdio_set_slsb(q, bufno, state, count);
 293 #ifdef CONFIG_QDIO_DEBUG
 294         qdio_trace_slsb(q);
 295 #endif
 296         return rc;
 297 }
 298 static inline int
 299 qdio_siga_sync(struct qdio_q *q, unsigned int gpr2,
 300                unsigned int gpr3)
 301 {
 302         int cc;
 303
 304         QDIO_DBF_TEXT4(0,trace,"sigasync");
 305         QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
 306
 307         qdio_perf_stat_inc(&perf_stats.siga_syncs);
 308
 309         cc = do_siga_sync(q->schid, gpr2, gpr3);
 310         if (cc)
 311                 QDIO_DBF_HEX3(0,trace,&cc,sizeof(int*));
 312
 313         return cc;
 314 }
 315
 316 static inline int
 317 qdio_siga_sync_q(struct qdio_q *q)
 318 {
 319         if (q->is_input_q)
 320                 return qdio_siga_sync(q, 0, q->mask);
 321         return qdio_siga_sync(q, q->mask, 0);
 322 }
 323
 324 static int
 325 __do_siga_output(struct qdio_q *q, unsigned int *busy_bit)
 326 {
 327        struct qdio_irq *irq;
 328        unsigned int fc = 0;
 329        unsigned long schid;
 330
 331        irq = (struct qdio_irq *) q->irq_ptr;
 332        if (!irq->is_qebsm)
 333                schid = *((u32 *)&q->schid);
 334        else {
 335                schid = irq->sch_token;
 336                fc |= 0x80;
 337        }
 338        return do_siga_output(schid, q->mask, busy_bit, fc);
 339 }
 340
 341 /*
 342  * returns QDIO_SIGA_ERROR_ACCESS_EXCEPTION as cc, when SIGA returns
 343  * an access exception
 344  */
 345 static int
 346 qdio_siga_output(struct qdio_q *q)
 347 {
 348         int cc;
 349         __u32 busy_bit;
 350         __u64 start_time=0;
 351
 352         qdio_perf_stat_inc(&perf_stats.siga_outs);
 353
 354         QDIO_DBF_TEXT4(0,trace,"sigaout");
 355         QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
 356
 357         for (;;) {
 358                 cc = __do_siga_output(q, &busy_bit);
 359 //QDIO_PRINT_ERR("cc=%x, busy=%x\n",cc,busy_bit);
 360                 if ((cc==2) && (busy_bit) && (q->is_iqdio_q)) {
 361                         if (!start_time)
 362                                 start_time=NOW;
 363                         if ((NOW-start_time)>QDIO_BUSY_BIT_PATIENCE)
 364                                 break;
 365                 } else
 366                         break;
 367         }
 368
 369         if ((cc==2) && (busy_bit))
 370                 cc |= QDIO_SIGA_ERROR_B_BIT_SET;
 371
 372         if (cc)
 373                 QDIO_DBF_HEX3(0,trace,&cc,sizeof(int*));
 374
 375         return cc;
 376 }
 377
 378 static int
 379 qdio_siga_input(struct qdio_q *q)
 380 {
 381         int cc;
 382
 383         QDIO_DBF_TEXT4(0,trace,"sigain");
 384         QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
 385
 386         qdio_perf_stat_inc(&perf_stats.siga_ins);
 387
 388         cc = do_siga_input(q->schid, q->mask);
 389
 390         if (cc)
 391                 QDIO_DBF_HEX3(0,trace,&cc,sizeof(int*));
 392
 393         return cc;
 394 }
 395
 396 /* locked by the locks in qdio_activate and qdio_cleanup */
 397 static __u32 *
 398 qdio_get_indicator(void)
 399 {
 400         int i;
 401
 402         for (i=1;i<INDICATORS_PER_CACHELINE;i++)
 403                 if (!indicator_used[i]) {
 404                         indicator_used[i]=1;
 405                         return indicators+i;
 406                 }
 407         atomic_inc(&spare_indicator_usecount);
 408         return (__u32 * volatile) &spare_indicator;
 409 }
 410
 411 /* locked by the locks in qdio_activate and qdio_cleanup */
 412 static void
 413 qdio_put_indicator(__u32 *addr)
 414 {
 415         int i;
 416
 417         if ( (addr) && (addr!=&spare_indicator) ) {
 418                 i=addr-indicators;
 419                 indicator_used[i]=0;
 420         }
 421         if (addr == &spare_indicator)
 422                 atomic_dec(&spare_indicator_usecount);
 423 }
 424
 425 static inline void
 426 tiqdio_clear_summary_bit(__u32 *location)
 427 {
 428         QDIO_DBF_TEXT5(0,trace,"clrsummb");
 429         QDIO_DBF_HEX5(0,trace,&location,sizeof(void*));
 430
 431         xchg(location,0);
 432 }
 433
 434 static inline  void
 435 tiqdio_set_summary_bit(__u32 *location)
 436 {
 437         QDIO_DBF_TEXT5(0,trace,"setsummb");
 438         QDIO_DBF_HEX5(0,trace,&location,sizeof(void*));
 439
 440         xchg(location,-1);
 441 }
 442
 443 static inline void
 444 tiqdio_sched_tl(void)
 445 {
 446         tasklet_hi_schedule(&tiqdio_tasklet);
 447 }
 448
 449 static void
 450 qdio_mark_tiq(struct qdio_q *q)
 451 {
 452         unsigned long flags;
 453
 454         QDIO_DBF_TEXT4(0,trace,"mark iq");
 455         QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
 456
 457         spin_lock_irqsave(&ttiq_list_lock,flags);
 458         if (unlikely(atomic_read(&q->is_in_shutdown)))
 459                 goto out_unlock;
 460
 461         if (!q->is_input_q)
 462                 goto out_unlock;
 463
 464         if ((q->list_prev) || (q->list_next))
 465                 goto out_unlock;
 466
 467         if (!tiq_list) {
 468                 tiq_list=q;
 469                 q->list_prev=q;
 470                 q->list_next=q;
 471         } else {
 472                 q->list_next=tiq_list;
 473                 q->list_prev=tiq_list->list_prev;
 474                 tiq_list->list_prev->list_next=q;
 475                 tiq_list->list_prev=q;
 476         }
 477         spin_unlock_irqrestore(&ttiq_list_lock,flags);
 478
 479         tiqdio_set_summary_bit((__u32*)q->dev_st_chg_ind);
 480         tiqdio_sched_tl();
 481         return;
 482 out_unlock:
 483         spin_unlock_irqrestore(&ttiq_list_lock,flags);
 484         return;
 485 }
 486
 487 static inline void
 488 qdio_mark_q(struct qdio_q *q)
 489 {
 490         QDIO_DBF_TEXT4(0,trace,"mark q");
 491         QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
 492
 493         if (unlikely(atomic_read(&q->is_in_shutdown)))
 494                 return;
 495
 496         tasklet_schedule(&q->tasklet);
 497 }
 498
 499 static int
 500 qdio_stop_polling(struct qdio_q *q)
 501 {
 502 #ifdef QDIO_USE_PROCESSING_STATE
 503        unsigned int tmp, gsf, count = 1;
 504        unsigned char state = 0;
 505        struct qdio_irq *irq = (struct qdio_irq *) q->irq_ptr;
 506
 507         if (!atomic_xchg(&q->polling,0))
 508                 return 1;
 509
 510         QDIO_DBF_TEXT4(0,trace,"stoppoll");
 511         QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
 512
 513         /* show the card that we are not polling anymore */
 514         if (!q->is_input_q)
 515                 return 1;
 516
 517        tmp = gsf = GET_SAVED_FRONTIER(q);
 518        tmp = ((tmp + QDIO_MAX_BUFFERS_PER_Q-1) & (QDIO_MAX_BUFFERS_PER_Q-1) );
 519        set_slsb(q, &tmp, SLSB_P_INPUT_NOT_INIT, &count);
 520
 521         /*
 522          * we don't issue this SYNC_MEMORY, as we trust Rick T and
 523          * moreover will not use the PROCESSING state under VM, so
 524          * q->polling was 0 anyway
 525          */
 526         /*SYNC_MEMORY;*/
 527        if (irq->is_qebsm) {
 528                count = 1;
 529                qdio_do_eqbs(q, &state, &gsf, &count);
 530        } else
 531                state = q->slsb.acc.val[gsf];
 532        if (state != SLSB_P_INPUT_PRIMED)
 533                 return 1;
 534         /*
 535          * set our summary bit again, as otherwise there is a
 536          * small window we can miss between resetting it and
 537          * checking for PRIMED state
 538          */
 539         if (q->is_thinint_q)
 540                 tiqdio_set_summary_bit((__u32*)q->dev_st_chg_ind);
 541         return 0;
 542
 543 #else /* QDIO_USE_PROCESSING_STATE */
 544         return 1;
 545 #endif /* QDIO_USE_PROCESSING_STATE */
 546 }
 547
 548 /*
 549  * see the comment in do_QDIO and before qdio_reserve_q about the
 550  * sophisticated locking outside of unmark_q, so that we don't need to
 551  * disable the interrupts :-)
 552 */
 553 static void
 554 qdio_unmark_q(struct qdio_q *q)
 555 {
 556         unsigned long flags;
 557
 558         QDIO_DBF_TEXT4(0,trace,"unmark q");
 559         QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
 560
 561         if ((!q->list_prev)||(!q->list_next))
 562                 return;
 563
 564         if ((q->is_thinint_q)&&(q->is_input_q)) {
 565                 /* iQDIO */
 566                 spin_lock_irqsave(&ttiq_list_lock,flags);
 567                 /* in case cleanup has done this already and simultanously
 568                  * qdio_unmark_q is called from the interrupt handler, we've
 569                  * got to check this in this specific case again */
 570                 if ((!q->list_prev)||(!q->list_next))
 571                         goto out;
 572                 if (q->list_next==q) {
 573                         /* q was the only interesting q */
 574                         tiq_list=NULL;
 575                         q->list_next=NULL;
 576                         q->list_prev=NULL;
 577                 } else {
 578                         q->list_next->list_prev=q->list_prev;
 579                         q->list_prev->list_next=q->list_next;
 580                         tiq_list=q->list_next;
 581                         q->list_next=NULL;
 582                         q->list_prev=NULL;
 583                 }
 584 out:
 585                 spin_unlock_irqrestore(&ttiq_list_lock,flags);
 586         }
 587 }
 588
 589 static inline unsigned long
 590 tiqdio_clear_global_summary(void)
 591 {
 592         unsigned long time;
 593
 594         QDIO_DBF_TEXT5(0,trace,"clrglobl");
 595
 596         time = do_clear_global_summary();
 597
 598         QDIO_DBF_HEX5(0,trace,&time,sizeof(unsigned long));
 599
 600         return time;
 601 }
 602
 603
 604 /************************* OUTBOUND ROUTINES *******************************/
 605 static int
 606 qdio_qebsm_get_outbound_buffer_frontier(struct qdio_q *q)
 607 {
 608         struct qdio_irq *irq;
 609         unsigned char state;
 610         unsigned int cnt, count, ftc;
 611
 612         irq = (struct qdio_irq *) q->irq_ptr;
 613         if ((!q->is_iqdio_q) && (!q->hydra_gives_outbound_pcis))
 614                 SYNC_MEMORY;
 615
 616         ftc = q->first_to_check;
 617         count = qdio_min(atomic_read(&q->number_of_buffers_used),
 618                         (QDIO_MAX_BUFFERS_PER_Q-1));
 619         if (count == 0)
 620                 return q->first_to_check;
 621         cnt = qdio_do_eqbs(q, &state, &ftc, &count);
 622         if (cnt == 0)
 623                 return q->first_to_check;
 624         switch (state) {
 625         case SLSB_P_OUTPUT_ERROR:
 626                 QDIO_DBF_TEXT3(0,trace,"outperr");
 627                 atomic_sub(cnt , &q->number_of_buffers_used);
 628                 if (q->qdio_error)
 629                         q->error_status_flags |=
 630                                 QDIO_STATUS_MORE_THAN_ONE_QDIO_ERROR;
 631                 q->qdio_error = SLSB_P_OUTPUT_ERROR;
 632                 q->error_status_flags |= QDIO_STATUS_LOOK_FOR_ERROR;
 633                 q->first_to_check = ftc;
 634                 break;
 635         case SLSB_P_OUTPUT_EMPTY:
 636                 QDIO_DBF_TEXT5(0,trace,"outpempt");
 637                 atomic_sub(cnt, &q->number_of_buffers_used);
 638                 q->first_to_check = ftc;
 639                 break;
 640         case SLSB_CU_OUTPUT_PRIMED:
 641                 /* all buffers primed */
 642                 QDIO_DBF_TEXT5(0,trace,"outpprim");
 643                 break;
 644         default:
 645                 break;
 646         }
 647         QDIO_DBF_HEX4(0,trace,&q->first_to_check,sizeof(int));
 648         return q->first_to_check;
 649 }
 650
 651 static int
 652 qdio_qebsm_get_inbound_buffer_frontier(struct qdio_q *q)
 653 {
 654         struct qdio_irq *irq;
 655         unsigned char state;
 656         int tmp, ftc, count, cnt;
 657         char dbf_text[15];
 658
 659
 660         irq = (struct qdio_irq *) q->irq_ptr;
 661         ftc = q->first_to_check;
 662         count = qdio_min(atomic_read(&q->number_of_buffers_used),
 663                         (QDIO_MAX_BUFFERS_PER_Q-1));
 664         if (count == 0)
 665                  return q->first_to_check;
 666         cnt = qdio_do_eqbs(q, &state, &ftc, &count);
 667         if (cnt == 0)
 668                  return q->first_to_check;
 669         switch (state) {
 670         case SLSB_P_INPUT_ERROR :
 671 #ifdef CONFIG_QDIO_DEBUG
 672                 QDIO_DBF_TEXT3(1,trace,"inperr");
 673                 sprintf(dbf_text,"%2x,%2x",ftc,count);
 674                 QDIO_DBF_TEXT3(1,trace,dbf_text);
 675 #endif /* CONFIG_QDIO_DEBUG */
 676                 if (q->qdio_error)
 677                         q->error_status_flags |=
 678                                 QDIO_STATUS_MORE_THAN_ONE_QDIO_ERROR;
 679                 q->qdio_error = SLSB_P_INPUT_ERROR;
 680                 q->error_status_flags |= QDIO_STATUS_LOOK_FOR_ERROR;
 681                 atomic_sub(cnt, &q->number_of_buffers_used);
 682                 q->first_to_check = ftc;
 683                 break;
 684         case SLSB_P_INPUT_PRIMED :
 685                 QDIO_DBF_TEXT3(0,trace,"inptprim");
 686                 sprintf(dbf_text,"%2x,%2x",ftc,count);
 687                 QDIO_DBF_TEXT3(1,trace,dbf_text);
 688                 tmp = 0;
 689                 ftc = q->first_to_check;
 690 #ifdef QDIO_USE_PROCESSING_STATE
 691                 if (cnt > 1) {
 692                         cnt -= 1;
 693                         tmp = set_slsb(q, &ftc, SLSB_P_INPUT_NOT_INIT, &cnt);
 694                         if (!tmp)
 695                                 break;
 696                 }
 697                 cnt = 1;
 698                 tmp += set_slsb(q, &ftc,
 699                                SLSB_P_INPUT_PROCESSING, &cnt);
 700                 atomic_set(&q->polling, 1);
 701 #else
 702                 tmp = set_slsb(q, &ftc, SLSB_P_INPUT_NOT_INIT, &cnt);
 703 #endif
 704                 atomic_sub(tmp, &q->number_of_buffers_used);
 705                 q->first_to_check = ftc;
 706                 break;
 707         case SLSB_CU_INPUT_EMPTY:
 708         case SLSB_P_INPUT_NOT_INIT:
 709         case SLSB_P_INPUT_PROCESSING:
 710                 QDIO_DBF_TEXT5(0,trace,"inpnipro");
 711                 break;
 712         default:
 713                 break;
 714         }
 715         QDIO_DBF_HEX4(0,trace,&q->first_to_check,sizeof(int));
 716         return q->first_to_check;
 717 }
 718
 719 static int
 720 qdio_get_outbound_buffer_frontier(struct qdio_q *q)
 721 {
 722         struct qdio_irq *irq;
 723         volatile char *slsb;
 724         unsigned int count = 1;
 725         int first_not_to_check, f, f_mod_no;
 726         char dbf_text[15];
 727
 728         QDIO_DBF_TEXT4(0,trace,"getobfro");
 729         QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
 730
 731         irq = (struct qdio_irq *) q->irq_ptr;
 732         if (irq->is_qebsm)
 733                 return qdio_qebsm_get_outbound_buffer_frontier(q);
 734
 735         slsb=&q->slsb.acc.val[0];
 736         f_mod_no=f=q->first_to_check;
 737         /*
 738          * f points to already processed elements, so f+no_used is correct...
 739          * ... but: we don't check 128 buffers, as otherwise
 740          * qdio_has_outbound_q_moved would return 0
 741          */
 742         first_not_to_check=f+qdio_min(atomic_read(&q->number_of_buffers_used),
 743                                       (QDIO_MAX_BUFFERS_PER_Q-1));
 744
 745         if ((!q->is_iqdio_q)&&(!q->hydra_gives_outbound_pcis))
 746                 SYNC_MEMORY;
 747
 748 check_next:
 749         if (f==first_not_to_check)
 750                 goto out;
 751
 752         switch(slsb[f_mod_no]) {
 753
 754         /* the adapter has not fetched the output yet */
 755         case SLSB_CU_OUTPUT_PRIMED:
 756                 QDIO_DBF_TEXT5(0,trace,"outpprim");
 757                 break;
 758
 759         /* the adapter got it */
 760         case SLSB_P_OUTPUT_EMPTY:
 761                 atomic_dec(&q->number_of_buffers_used);
 762                 f++;
 763                 f_mod_no=f&(QDIO_MAX_BUFFERS_PER_Q-1);
 764                 QDIO_DBF_TEXT5(0,trace,"outpempt");
 765                 goto check_next;
 766
 767         case SLSB_P_OUTPUT_ERROR:
 768                 QDIO_DBF_TEXT3(0,trace,"outperr");
 769                 sprintf(dbf_text,"%x-%x-%x",f_mod_no,
 770                         q->sbal[f_mod_no]->element[14].sbalf.value,
 771                         q->sbal[f_mod_no]->element[15].sbalf.value);
 772                 QDIO_DBF_TEXT3(1,trace,dbf_text);
 773                 QDIO_DBF_HEX2(1,sbal,q->sbal[f_mod_no],256);
 774
 775                 /* kind of process the buffer */
 776                 set_slsb(q, &f_mod_no, SLSB_P_OUTPUT_NOT_INIT, &count);
 777
 778                 /*
 779                  * we increment the frontier, as this buffer
 780                  * was processed obviously
 781                  */
 782                 atomic_dec(&q->number_of_buffers_used);
 783                 f_mod_no=(f_mod_no+1)&(QDIO_MAX_BUFFERS_PER_Q-1);
 784
 785                 if (q->qdio_error)
 786                         q->error_status_flags|=
 787                                 QDIO_STATUS_MORE_THAN_ONE_QDIO_ERROR;
 788                 q->qdio_error=SLSB_P_OUTPUT_ERROR;
 789                 q->error_status_flags|=QDIO_STATUS_LOOK_FOR_ERROR;
 790
 791                 break;
 792
 793         /* no new buffers */
 794         default:
 795                 QDIO_DBF_TEXT5(0,trace,"outpni");
 796         }
 797 out:
 798         return (q->first_to_check=f_mod_no);
 799 }
 800
 801 /* all buffers are processed */
 802 static int
 803 qdio_is_outbound_q_done(struct qdio_q *q)
 804 {
 805         int no_used;
 806 #ifdef CONFIG_QDIO_DEBUG
 807         char dbf_text[15];
 808 #endif
 809
 810         no_used=atomic_read(&q->number_of_buffers_used);
 811
 812 #ifdef CONFIG_QDIO_DEBUG
 813         if (no_used) {
 814                 sprintf(dbf_text,"oqisnt%02x",no_used);
 815                 QDIO_DBF_TEXT4(0,trace,dbf_text);
 816         } else {
 817                 QDIO_DBF_TEXT4(0,trace,"oqisdone");
 818         }
 819         QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
 820 #endif /* CONFIG_QDIO_DEBUG */
 821         return (no_used==0);
 822 }
 823
 824 static int
 825 qdio_has_outbound_q_moved(struct qdio_q *q)
 826 {
 827         int i;
 828
 829         i=qdio_get_outbound_buffer_frontier(q);
 830
 831         if ( (i!=GET_SAVED_FRONTIER(q)) ||
 832              (q->error_status_flags&QDIO_STATUS_LOOK_FOR_ERROR) ) {
 833                 SAVE_FRONTIER(q,i);
 834                 QDIO_DBF_TEXT4(0,trace,"oqhasmvd");
 835                 QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
 836                 return 1;
 837         } else {
 838                 QDIO_DBF_TEXT4(0,trace,"oqhsntmv");
 839                 QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
 840                 return 0;
 841         }
 842 }
 843
 844 static void
 845 qdio_kick_outbound_q(struct qdio_q *q)
 846 {
 847         int result;
 848 #ifdef CONFIG_QDIO_DEBUG
 849         char dbf_text[15];
 850
 851         QDIO_DBF_TEXT4(0,trace,"kickoutq");
 852         QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
 853 #endif /* CONFIG_QDIO_DEBUG */
 854
 855         if (!q->siga_out)
 856                 return;
 857
 858         /* here's the story with cc=2 and busy bit set (thanks, Rick):
 859          * VM's CP could present us cc=2 and busy bit set on SIGA-write
 860          * during reconfiguration of their Guest LAN (only in HIPERS mode,
 861          * QDIO mode is asynchronous -- cc=2 and busy bit there will take
 862          * the queues down immediately; and not being under VM we have a
 863          * problem on cc=2 and busy bit set right away).
 864          *
 865          * Therefore qdio_siga_output will try for a short time constantly,
 866          * if such a condition occurs. If it doesn't change, it will
 867          * increase the busy_siga_counter and save the timestamp, and
 868          * schedule the queue for later processing (via mark_q, using the
 869          * queue tasklet). __qdio_outbound_processing will check out the
 870          * counter. If non-zero, it will call qdio_kick_outbound_q as often
 871          * as the value of the counter. This will attempt further SIGA
 872          * instructions. For each successful SIGA, the counter is
 873          * decreased, for failing SIGAs the counter remains the same, after
 874          * all.
 875          * After some time of no movement, qdio_kick_outbound_q will
 876          * finally fail and reflect corresponding error codes to call
 877          * the upper layer module and have it take the queues down.
 878          *
 879          * Note that this is a change from the original HiperSockets design
 880          * (saying cc=2 and busy bit means take the queues down), but in
 881          * these days Guest LAN didn't exist... excessive cc=2 with busy bit
 882          * conditions will still take the queues down, but the threshold is
 883          * higher due to the Guest LAN environment.
 884          */
 885
 886
 887         result=qdio_siga_output(q);
 888
 889         switch (result) {
 890         case 0:
 891                 /* went smooth this time, reset timestamp */
 892 #ifdef CONFIG_QDIO_DEBUG
 893                 QDIO_DBF_TEXT3(0,trace,"cc2reslv");
 894                 sprintf(dbf_text,"%4x%2x%2x",q->schid.sch_no,q->q_no,
 895                         atomic_read(&q->busy_siga_counter));
 896                 QDIO_DBF_TEXT3(0,trace,dbf_text);
 897 #endif /* CONFIG_QDIO_DEBUG */
 898                 q->timing.busy_start=0;
 899                 break;
 900         case (2|QDIO_SIGA_ERROR_B_BIT_SET):
 901                 /* cc=2 and busy bit: */
 902                 atomic_inc(&q->busy_siga_counter);
 903
 904                 /* if the last siga was successful, save
 905                  * timestamp here */
 906                 if (!q->timing.busy_start)
 907                         q->timing.busy_start=NOW;
 908
 909                 /* if we're in time, don't touch error_status_flags
 910                  * and siga_error */
 911                 if (NOW-q->timing.busy_start<QDIO_BUSY_BIT_GIVE_UP) {
 912                         qdio_mark_q(q);
 913                         break;
 914                 }
 915                 QDIO_DBF_TEXT2(0,trace,"cc2REPRT");
 916 #ifdef CONFIG_QDIO_DEBUG
 917                 sprintf(dbf_text,"%4x%2x%2x",q->schid.sch_no,q->q_no,
 918                         atomic_read(&q->busy_siga_counter));
 919                 QDIO_DBF_TEXT3(0,trace,dbf_text);
 920 #endif /* CONFIG_QDIO_DEBUG */
 921                 /* else fallthrough and report error */
 922         default:
 923                 /* for plain cc=1, 2 or 3: */
 924                 if (q->siga_error)
 925                         q->error_status_flags|=
 926                                 QDIO_STATUS_MORE_THAN_ONE_SIGA_ERROR;
 927                 q->error_status_flags|=
 928                         QDIO_STATUS_LOOK_FOR_ERROR;
 929                 q->siga_error=result;
 930         }
 931 }
 932
 933 static void
 934 qdio_kick_outbound_handler(struct qdio_q *q)
 935 {
 936         int start, end, real_end, count;
 937 #ifdef CONFIG_QDIO_DEBUG
 938         char dbf_text[15];
 939 #endif
 940
 941         start = q->first_element_to_kick;
 942         /* last_move_ftc was just updated */
 943         real_end = GET_SAVED_FRONTIER(q);
 944         end = (real_end+QDIO_MAX_BUFFERS_PER_Q-1)&
 945                 (QDIO_MAX_BUFFERS_PER_Q-1);
 946         count = (end+QDIO_MAX_BUFFERS_PER_Q+1-start)&
 947                 (QDIO_MAX_BUFFERS_PER_Q-1);
 948
 949 #ifdef CONFIG_QDIO_DEBUG
 950         QDIO_DBF_TEXT4(0,trace,"kickouth");
 951         QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
 952
 953         sprintf(dbf_text,"s=%2xc=%2x",start,count);
 954         QDIO_DBF_TEXT4(0,trace,dbf_text);
 955 #endif /* CONFIG_QDIO_DEBUG */
 956
 957         if (q->state==QDIO_IRQ_STATE_ACTIVE)
 958                 q->handler(q->cdev,QDIO_STATUS_OUTBOUND_INT|
 959                            q->error_status_flags,
 960                            q->qdio_error,q->siga_error,q->q_no,start,count,
 961                            q->int_parm);
 962
 963         /* for the next time: */
 964         q->first_element_to_kick=real_end;
 965         q->qdio_error=0;
 966         q->siga_error=0;
 967         q->error_status_flags=0;
 968 }
 969
 970 static void
 971 __qdio_outbound_processing(struct qdio_q *q)
 972 {
 973         int siga_attempts;
 974
 975         QDIO_DBF_TEXT4(0,trace,"qoutproc");
 976         QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
 977
 978         if (unlikely(qdio_reserve_q(q))) {
 979                 qdio_release_q(q);
 980                 qdio_perf_stat_inc(&perf_stats.outbound_tl_runs_resched);
 981                 /* as we're sissies, we'll check next time */
 982                 if (likely(!atomic_read(&q->is_in_shutdown))) {
 983                         qdio_mark_q(q);
 984                         QDIO_DBF_TEXT4(0,trace,"busy,agn");
 985                 }
 986                 return;
 987         }
 988         qdio_perf_stat_inc(&perf_stats.outbound_tl_runs);
 989         qdio_perf_stat_inc(&perf_stats.tl_runs);
 990
 991         /* see comment in qdio_kick_outbound_q */
 992         siga_attempts=atomic_read(&q->busy_siga_counter);
 993         while (siga_attempts) {
 994                 atomic_dec(&q->busy_siga_counter);
 995                 qdio_kick_outbound_q(q);
 996                 siga_attempts--;
 997         }
 998
 999         if (qdio_has_outbound_q_moved(q))
1000                 qdio_kick_outbound_handler(q);
1001
1002         if (q->queue_type == QDIO_ZFCP_QFMT) {
1003                 if ((!q->hydra_gives_outbound_pcis) &&
1004                     (!qdio_is_outbound_q_done(q)))
1005                         qdio_mark_q(q);
1006         }
1007         else if (((!q->is_iqdio_q) && (!q->is_pci_out)) ||
1008                  (q->queue_type == QDIO_IQDIO_QFMT_ASYNCH)) {
1009                 /*
1010                  * make sure buffer switch from PRIMED to EMPTY is noticed
1011                  * and outbound_handler is called
1012                  */
1013                 if (qdio_is_outbound_q_done(q)) {
1014                         del_timer(&q->timer);
1015                 } else {
1016                         if (!timer_pending(&q->timer))
1017                                 mod_timer(&q->timer, jiffies +
1018                                           QDIO_FORCE_CHECK_TIMEOUT);
1019                 }
1020         }
1021
1022         qdio_release_q(q);
1023 }
1024
1025 static void
1026 qdio_outbound_processing(struct qdio_q *q)
1027 {
1028         __qdio_outbound_processing(q);
1029 }
1030
1031 /************************* INBOUND ROUTINES *******************************/
1032
1033
1034 static int
1035 qdio_get_inbound_buffer_frontier(struct qdio_q *q)
1036 {
1037         struct qdio_irq *irq;
1038         int f,f_mod_no;
1039         volatile char *slsb;
1040         unsigned int count = 1;
1041         int first_not_to_check;
1042 #ifdef CONFIG_QDIO_DEBUG
1043         char dbf_text[15];
1044 #endif /* CONFIG_QDIO_DEBUG */
1045 #ifdef QDIO_USE_PROCESSING_STATE
1046         int last_position=-1;
1047 #endif /* QDIO_USE_PROCESSING_STATE */
1048
1049         QDIO_DBF_TEXT4(0,trace,"getibfro");
1050         QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
1051
1052         irq = (struct qdio_irq *) q->irq_ptr;
1053         if (irq->is_qebsm)
1054                 return qdio_qebsm_get_inbound_buffer_frontier(q);
1055
1056         slsb=&q->slsb.acc.val[0];
1057         f_mod_no=f=q->first_to_check;
1058         /*
1059          * we don't check 128 buffers, as otherwise qdio_has_inbound_q_moved
1060          * would return 0
1061          */
1062         first_not_to_check=f+qdio_min(atomic_read(&q->number_of_buffers_used),
1063                                       (QDIO_MAX_BUFFERS_PER_Q-1));
1064
1065         /*
1066          * we don't use this one, as a PCI or we after a thin interrupt
1067          * will sync the queues
1068          */
1069         /* SYNC_MEMORY;*/
1070
1071 check_next:
1072         f_mod_no=f&(QDIO_MAX_BUFFERS_PER_Q-1);
1073         if (f==first_not_to_check)
1074                 goto out;
1075         switch (slsb[f_mod_no]) {
1076
1077         /* CU_EMPTY means frontier is reached */
1078         case SLSB_CU_INPUT_EMPTY:
1079                 QDIO_DBF_TEXT5(0,trace,"inptempt");
1080                 break;
1081
1082         /* P_PRIMED means set slsb to P_PROCESSING and move on */
1083         case SLSB_P_INPUT_PRIMED:
1084                 QDIO_DBF_TEXT5(0,trace,"inptprim");
1085
1086 #ifdef QDIO_USE_PROCESSING_STATE
1087                 /*
1088                  * as soon as running under VM, polling the input queues will
1089                  * kill VM in terms of CP overhead
1090                  */
1091                 if (q->siga_sync) {
1092                         set_slsb(q, &f_mod_no, SLSB_P_INPUT_NOT_INIT, &count);
1093                 } else {
1094                         /* set the previous buffer to NOT_INIT. The current
1095                          * buffer will be set to PROCESSING at the end of
1096                          * this function to avoid further interrupts. */
1097                         if (last_position>=0)
1098                                 set_slsb(q, &last_position,
1099                                          SLSB_P_INPUT_NOT_INIT, &count);
1100                         atomic_set(&q->polling,1);
1101                         last_position=f_mod_no;
1102                 }
1103 #else /* QDIO_USE_PROCESSING_STATE */
1104                 set_slsb(q, &f_mod_no, SLSB_P_INPUT_NOT_INIT, &count);
1105 #endif /* QDIO_USE_PROCESSING_STATE */
1106                 /*
1107                  * not needed, as the inbound queue will be synced on the next
1108                  * siga-r, resp. tiqdio_is_inbound_q_done will do the siga-s
1109                  */
1110                 /*SYNC_MEMORY;*/
1111                 f++;
1112                 atomic_dec(&q->number_of_buffers_used);
1113                 goto check_next;
1114
1115         case SLSB_P_INPUT_NOT_INIT:
1116         case SLSB_P_INPUT_PROCESSING:
1117                 QDIO_DBF_TEXT5(0,trace,"inpnipro");
1118                 break;
1119
1120         /* P_ERROR means frontier is reached, break and report error */
1121         case SLSB_P_INPUT_ERROR:
1122 #ifdef CONFIG_QDIO_DEBUG
1123                 sprintf(dbf_text,"inperr%2x",f_mod_no);
1124                 QDIO_DBF_TEXT3(1,trace,dbf_text);
1125 #endif /* CONFIG_QDIO_DEBUG */
1126                 QDIO_DBF_HEX2(1,sbal,q->sbal[f_mod_no],256);
1127
1128                 /* kind of process the buffer */
1129                 set_slsb(q, &f_mod_no, SLSB_P_INPUT_NOT_INIT, &count);
1130
1131                 if (q->qdio_error)
1132                         q->error_status_flags|=
1133                                 QDIO_STATUS_MORE_THAN_ONE_QDIO_ERROR;
1134                 q->qdio_error=SLSB_P_INPUT_ERROR;
1135                 q->error_status_flags|=QDIO_STATUS_LOOK_FOR_ERROR;
1136
1137                 /* we increment the frontier, as this buffer
1138                  * was processed obviously */
1139                 f_mod_no=(f_mod_no+1)&(QDIO_MAX_BUFFERS_PER_Q-1);
1140                 atomic_dec(&q->number_of_buffers_used);
1141
1142 #ifdef QDIO_USE_PROCESSING_STATE
1143                 last_position=-1;
1144 #endif /* QDIO_USE_PROCESSING_STATE */
1145
1146                 break;
1147
1148         /* everything else means frontier not changed (HALTED or so) */
1149         default:
1150                 break;
1151         }
1152 out:
1153         q->first_to_check=f_mod_no;
1154
1155 #ifdef QDIO_USE_PROCESSING_STATE
1156         if (last_position>=0)
1157                 set_slsb(q, &last_position, SLSB_P_INPUT_PROCESSING, &count);
1158 #endif /* QDIO_USE_PROCESSING_STATE */
1159
1160         QDIO_DBF_HEX4(0,trace,&q->first_to_check,sizeof(int));
1161
1162         return q->first_to_check;
1163 }
1164
1165 static int
1166 qdio_has_inbound_q_moved(struct qdio_q *q)
1167 {
1168         int i;
1169
1170         i=qdio_get_inbound_buffer_frontier(q);
1171         if ( (i!=GET_SAVED_FRONTIER(q)) ||
1172              (q->error_status_flags&QDIO_STATUS_LOOK_FOR_ERROR) ) {
1173                 SAVE_FRONTIER(q,i);
1174                 if ((!q->siga_sync)&&(!q->hydra_gives_outbound_pcis))
1175                         SAVE_TIMESTAMP(q);
1176
1177                 QDIO_DBF_TEXT4(0,trace,"inhasmvd");
1178                 QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
1179                 return 1;
1180         } else {
1181                 QDIO_DBF_TEXT4(0,trace,"inhsntmv");
1182                 QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
1183                 return 0;
1184         }
1185 }
1186
1187 /* means, no more buffers to be filled */
1188 static int
1189 tiqdio_is_inbound_q_done(struct qdio_q *q)
1190 {
1191         int no_used;
1192         unsigned int start_buf, count;
1193         unsigned char state = 0;
1194         struct qdio_irq *irq = (struct qdio_irq *) q->irq_ptr;
1195
1196 #ifdef CONFIG_QDIO_DEBUG
1197         char dbf_text[15];
1198 #endif
1199
1200         no_used=atomic_read(&q->number_of_buffers_used);
1201
1202         /* propagate the change from 82 to 80 through VM */
1203         SYNC_MEMORY;
1204
1205 #ifdef CONFIG_QDIO_DEBUG
1206         if (no_used) {
1207                 sprintf(dbf_text,"iqisnt%02x",no_used);
1208                 QDIO_DBF_TEXT4(0,trace,dbf_text);
1209         } else {
1210                 QDIO_DBF_TEXT4(0,trace,"iniqisdo");
1211         }
1212         QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
1213 #endif /* CONFIG_QDIO_DEBUG */
1214
1215         if (!no_used)
1216                 return 1;
1217         if (!q->siga_sync && !irq->is_qebsm)
1218                 /* we'll check for more primed buffers in qeth_stop_polling */
1219                 return 0;
1220         if (irq->is_qebsm) {
1221                 count = 1;
1222                 start_buf = q->first_to_check;
1223                 qdio_do_eqbs(q, &state, &start_buf, &count);
1224         } else
1225                 state = q->slsb.acc.val[q->first_to_check];
1226         if (state != SLSB_P_INPUT_PRIMED)
1227                 /*
1228                  * nothing more to do, if next buffer is not PRIMED.
1229                  * note that we did a SYNC_MEMORY before, that there
1230                  * has been a sychnronization.
1231                  * we will return 0 below, as there is nothing to do
1232                  * (stop_polling not necessary, as we have not been
1233                  * using the PROCESSING state
1234                  */
1235                 return 0;
1236
1237         /*
1238          * ok, the next input buffer is primed. that means, that device state
1239          * change indicator and adapter local summary are set, so we will find
1240          * it next time.
1241          * we will return 0 below, as there is nothing to do, except scheduling
1242          * ourselves for the next time.
1243          */
1244         tiqdio_set_summary_bit((__u32*)q->dev_st_chg_ind);
1245         tiqdio_sched_tl();
1246         return 0;
1247 }
1248
1249 static int
1250 qdio_is_inbound_q_done(struct qdio_q *q)
1251 {
1252         int no_used;
1253         unsigned int start_buf, count;
1254         unsigned char state = 0;
1255         struct qdio_irq *irq = (struct qdio_irq *) q->irq_ptr;
1256
1257 #ifdef CONFIG_QDIO_DEBUG
1258         char dbf_text[15];
1259 #endif
1260
1261         no_used=atomic_read(&q->number_of_buffers_used);
1262
1263         /*
1264          * we need that one for synchronization with the adapter, as it
1265          * does a kind of PCI avoidance
1266          */
1267         SYNC_MEMORY;
1268
1269         if (!no_used) {
1270                 QDIO_DBF_TEXT4(0,trace,"inqisdnA");
1271                 QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
1272                 return 1;
1273         }
1274         if (irq->is_qebsm) {
1275                 count = 1;
1276                 start_buf = q->first_to_check;
1277                 qdio_do_eqbs(q, &state, &start_buf, &count);
1278         } else
1279                 state = q->slsb.acc.val[q->first_to_check];
1280         if (state == SLSB_P_INPUT_PRIMED) {
1281                 /* we got something to do */
1282                 QDIO_DBF_TEXT4(0,trace,"inqisntA");
1283                 QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
1284                 return 0;
1285         }
1286
1287         /* on VM, we don't poll, so the q is always done here */
1288         if (q->siga_sync)
1289                 return 1;
1290         if (q->hydra_gives_outbound_pcis)
1291                 return 1;
1292
1293         /*
1294          * at this point we know, that inbound first_to_check
1295          * has (probably) not moved (see qdio_inbound_processing)
1296          */
1297         if (NOW>GET_SAVED_TIMESTAMP(q)+q->timing.threshold) {
1298 #ifdef CONFIG_QDIO_DEBUG
1299                 QDIO_DBF_TEXT4(0,trace,"inqisdon");
1300                 QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
1301                 sprintf(dbf_text,"pf%02xcn%02x",q->first_to_check,no_used);
1302                 QDIO_DBF_TEXT4(0,trace,dbf_text);
1303 #endif /* CONFIG_QDIO_DEBUG */
1304                 return 1;
1305         } else {
1306 #ifdef CONFIG_QDIO_DEBUG
1307                 QDIO_DBF_TEXT4(0,trace,"inqisntd");
1308                 QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
1309                 sprintf(dbf_text,"pf%02xcn%02x",q->first_to_check,no_used);
1310                 QDIO_DBF_TEXT4(0,trace,dbf_text);
1311 #endif /* CONFIG_QDIO_DEBUG */
1312                 return 0;
1313         }
1314 }
1315
1316 static void
1317 qdio_kick_inbound_handler(struct qdio_q *q)
1318 {
1319         int count, start, end, real_end, i;
1320 #ifdef CONFIG_QDIO_DEBUG
1321         char dbf_text[15];
1322 #endif
1323
1324         QDIO_DBF_TEXT4(0,trace,"kickinh");
1325         QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
1326
1327         start=q->first_element_to_kick;
1328         real_end=q->first_to_check;
1329         end=(real_end+QDIO_MAX_BUFFERS_PER_Q-1)&(QDIO_MAX_BUFFERS_PER_Q-1);
1330
1331         i=start;
1332         count=0;
1333         while (1) {
1334                 count++;
1335                 if (i==end)
1336                         break;
1337                 i=(i+1)&(QDIO_MAX_BUFFERS_PER_Q-1);
1338         }
1339
1340 #ifdef CONFIG_QDIO_DEBUG
1341         sprintf(dbf_text,"s=%2xc=%2x",start,count);
1342         QDIO_DBF_TEXT4(0,trace,dbf_text);
1343 #endif /* CONFIG_QDIO_DEBUG */
1344
1345         if (likely(q->state==QDIO_IRQ_STATE_ACTIVE))
1346                 q->handler(q->cdev,
1347                            QDIO_STATUS_INBOUND_INT|q->error_status_flags,
1348                            q->qdio_error,q->siga_error,q->q_no,start,count,
1349                            q->int_parm);
1350
1351         /* for the next time: */
1352         q->first_element_to_kick=real_end;
1353         q->qdio_error=0;
1354         q->siga_error=0;
1355         q->error_status_flags=0;
1356
1357         qdio_perf_stat_inc(&perf_stats.inbound_cnt);
1358 }
1359
1360 static void
1361 __tiqdio_inbound_processing(struct qdio_q *q, int spare_ind_was_set)
1362 {
1363         struct qdio_irq *irq_ptr;
1364         struct qdio_q *oq;
1365         int i;
1366
1367         QDIO_DBF_TEXT4(0,trace,"iqinproc");
1368         QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
1369
1370         /*
1371          * we first want to reserve the q, so that we know, that we don't
1372          * interrupt ourselves and call qdio_unmark_q, as is_in_shutdown might
1373          * be set
1374          */
1375         if (unlikely(qdio_reserve_q(q))) {
1376                 qdio_release_q(q);
1377                 qdio_perf_stat_inc(&perf_stats.inbound_thin_tl_runs_resched);
1378                 /*
1379                  * as we might just be about to stop polling, we make
1380                  * sure that we check again at least once more
1381                  */
1382                 tiqdio_sched_tl();
1383                 return;
1384         }
1385         qdio_perf_stat_inc(&perf_stats.inbound_thin_tl_runs);
1386         if (unlikely(atomic_read(&q->is_in_shutdown))) {
1387                 qdio_unmark_q(q);
1388                 goto out;
1389         }
1390
1391         /*
1392          * we reset spare_ind_was_set, when the queue does not use the
1393          * spare indicator
1394          */
1395         if (spare_ind_was_set)
1396                 spare_ind_was_set = (q->dev_st_chg_ind == &spare_indicator);
1397
1398         if (!(*(q->dev_st_chg_ind)) && !spare_ind_was_set)
1399                 goto out;
1400         /*
1401          * q->dev_st_chg_ind is the indicator, be it shared or not.
1402          * only clear it, if indicator is non-shared
1403          */
1404         if (!spare_ind_was_set)
1405                 tiqdio_clear_summary_bit((__u32*)q->dev_st_chg_ind);
1406
1407         if (q->hydra_gives_outbound_pcis) {
1408                 if (!q->siga_sync_done_on_thinints) {
1409                         SYNC_MEMORY_ALL;
1410                 } else if ((!q->siga_sync_done_on_outb_tis)&&
1411                          (q->hydra_gives_outbound_pcis)) {
1412                         SYNC_MEMORY_ALL_OUTB;
1413                 }
1414         } else {
1415                 SYNC_MEMORY;
1416         }
1417         /*
1418          * maybe we have to do work on our outbound queues... at least
1419          * we have to check the outbound-int-capable thinint-capable
1420          * queues
1421          */
1422         if (q->hydra_gives_outbound_pcis) {
1423                 irq_ptr = (struct qdio_irq*)q->irq_ptr;
1424                 for (i=0;i<irq_ptr->no_output_qs;i++) {
1425                         oq = irq_ptr->output_qs[i];
1426                         if (!qdio_is_outbound_q_done(oq)) {
1427                                 qdio_perf_stat_dec(&perf_stats.tl_runs);
1428                                 __qdio_outbound_processing(oq);
1429                         }
1430                 }
1431         }
1432
1433         if (!qdio_has_inbound_q_moved(q))
1434                 goto out;
1435
1436         qdio_kick_inbound_handler(q);
1437         if (tiqdio_is_inbound_q_done(q))
1438                 if (!qdio_stop_polling(q)) {
1439                         /*
1440                          * we set the flags to get into the stuff next time,
1441                          * see also comment in qdio_stop_polling
1442                          */
1443                         tiqdio_set_summary_bit((__u32*)q->dev_st_chg_ind);
1444                         tiqdio_sched_tl();
1445                 }
1446 out:
1447         qdio_release_q(q);
1448 }
1449
1450 static void
1451 tiqdio_inbound_processing(struct qdio_q *q)
1452 {
1453         __tiqdio_inbound_processing(q, atomic_read(&spare_indicator_usecount));
1454 }
1455
1456 static void
1457 __qdio_inbound_processing(struct qdio_q *q)
1458 {
1459         int q_laps=0;
1460
1461         QDIO_DBF_TEXT4(0,trace,"qinproc");
1462         QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
1463
1464         if (unlikely(qdio_reserve_q(q))) {
1465                 qdio_release_q(q);
1466                 qdio_perf_stat_inc(&perf_stats.inbound_tl_runs_resched);
1467                 /* as we're sissies, we'll check next time */
1468                 if (likely(!atomic_read(&q->is_in_shutdown))) {
1469                         qdio_mark_q(q);
1470                         QDIO_DBF_TEXT4(0,trace,"busy,agn");
1471                 }
1472                 return;
1473         }
1474         qdio_perf_stat_inc(&perf_stats.inbound_tl_runs);
1475         qdio_perf_stat_inc(&perf_stats.tl_runs);
1476
1477 again:
1478         if (qdio_has_inbound_q_moved(q)) {
1479                 qdio_kick_inbound_handler(q);
1480                 if (!qdio_stop_polling(q)) {
1481                         q_laps++;
1482                         if (q_laps<QDIO_Q_LAPS)
1483                                 goto again;
1484                 }
1485                 qdio_mark_q(q);
1486         } else {
1487                 if (!qdio_is_inbound_q_done(q))
1488                         /* means poll time is not yet over */
1489                         qdio_mark_q(q);
1490         }
1491
1492         qdio_release_q(q);
1493 }
1494
1495 static void
1496 qdio_inbound_processing(struct qdio_q *q)
1497 {
1498         __qdio_inbound_processing(q);
1499 }
1500
1501 /************************* MAIN ROUTINES *******************************/
1502
1503 #ifdef QDIO_USE_PROCESSING_STATE
1504 static int
1505 tiqdio_reset_processing_state(struct qdio_q *q, int q_laps)
1506 {
1507         if (!q) {
1508                 tiqdio_sched_tl();
1509                 return 0;
1510         }
1511
1512         /*
1513          * under VM, we have not used the PROCESSING state, so no
1514          * need to stop polling
1515          */
1516         if (q->siga_sync)
1517                 return 2;
1518
1519         if (unlikely(qdio_reserve_q(q))) {
1520                 qdio_release_q(q);
1521                 qdio_perf_stat_inc(&perf_stats.inbound_thin_tl_runs_resched);
1522                 /*
1523                  * as we might just be about to stop polling, we make
1524                  * sure that we check again at least once more
1525                  */
1526
1527                 /*
1528                  * sanity -- we'd get here without setting the
1529                  * dev st chg ind
1530                  */
1531                 tiqdio_set_summary_bit((__u32*)q->dev_st_chg_ind);
1532                 tiqdio_sched_tl();
1533                 return 0;
1534         }
1535         if (qdio_stop_polling(q)) {
1536                 qdio_release_q(q);
1537                 return 2;
1538         }
1539         if (q_laps<QDIO_Q_LAPS-1) {
1540                 qdio_release_q(q);
1541                 return 3;
1542         }
1543         /*
1544          * we set the flags to get into the stuff
1545          * next time, see also comment in qdio_stop_polling
1546          */
1547         tiqdio_set_summary_bit((__u32*)q->dev_st_chg_ind);
1548         tiqdio_sched_tl();
1549         qdio_release_q(q);
1550         return 1;
1551
1552 }
1553 #endif /* QDIO_USE_PROCESSING_STATE */
1554
1555 static void
1556 tiqdio_inbound_checks(void)
1557 {
1558         struct qdio_q *q;
1559         int spare_ind_was_set=0;
1560 #ifdef QDIO_USE_PROCESSING_STATE
1561         int q_laps=0;
1562 #endif /* QDIO_USE_PROCESSING_STATE */
1563
1564         QDIO_DBF_TEXT4(0,trace,"iqdinbck");
1565         QDIO_DBF_TEXT5(0,trace,"iqlocsum");
1566
1567 #ifdef QDIO_USE_PROCESSING_STATE
1568 again:
1569 #endif /* QDIO_USE_PROCESSING_STATE */
1570
1571         /* when the spare indicator is used and set, save that and clear it */
1572         if ((atomic_read(&spare_indicator_usecount)) && spare_indicator) {
1573                 spare_ind_was_set = 1;
1574                 tiqdio_clear_summary_bit((__u32*)&spare_indicator);
1575         }
1576
1577         q=(struct qdio_q*)tiq_list;
1578         do {
1579                 if (!q)
1580                         break;
1581                 __tiqdio_inbound_processing(q, spare_ind_was_set);
1582                 q=(struct qdio_q*)q->list_next;
1583         } while (q!=(struct qdio_q*)tiq_list);
1584
1585 #ifdef QDIO_USE_PROCESSING_STATE
1586         q=(struct qdio_q*)tiq_list;
1587         do {
1588                 int ret;
1589
1590                 ret = tiqdio_reset_processing_state(q, q_laps);
1591                 switch (ret) {
1592                 case 0:
1593                         return;
1594                 case 1:
1595                         q_laps++;
1596                 case 2:
1597                         q = (struct qdio_q*)q->list_next;
1598                         break;
1599                 default:
1600                         q_laps++;
1601                         goto again;
1602                 }
1603         } while (q!=(struct qdio_q*)tiq_list);
1604 #endif /* QDIO_USE_PROCESSING_STATE */
1605 }
1606
1607 static void
1608 tiqdio_tl(unsigned long data)
1609 {
1610         QDIO_DBF_TEXT4(0,trace,"iqdio_tl");
1611
1612         qdio_perf_stat_inc(&perf_stats.tl_runs);
1613
1614         tiqdio_inbound_checks();
1615 }
1616
1617 /********************* GENERAL HELPER_ROUTINES ***********************/
1618
1619 static void
1620 qdio_release_irq_memory(struct qdio_irq *irq_ptr)
1621 {
1622         int i;
1623         struct qdio_q *q;
1624
1625         for (i = 0; i < QDIO_MAX_QUEUES_PER_IRQ; i++) {
1626                 q = irq_ptr->input_qs[i];
1627                 if (q) {
1628                         free_page((unsigned long) q->slib);
1629                         kmem_cache_free(qdio_q_cache, q);
1630                 }
1631                 q = irq_ptr->output_qs[i];
1632                 if (q) {
1633                         free_page((unsigned long) q->slib);
1634                         kmem_cache_free(qdio_q_cache, q);
1635                 }
1636         }
1637         free_page((unsigned long) irq_ptr->qdr);
1638         free_page((unsigned long) irq_ptr);
1639 }
1640
1641 static void
1642 qdio_set_impl_params(struct qdio_irq *irq_ptr,
1643                      unsigned int qib_param_field_format,
1644                      /* pointer to 128 bytes or NULL, if no param field */
1645                      unsigned char *qib_param_field,
1646                      /* pointer to no_queues*128 words of data or NULL */
1647                      unsigned int no_input_qs,
1648                      unsigned int no_output_qs,
1649                      unsigned long *input_slib_elements,
1650                      unsigned long *output_slib_elements)
1651 {
1652         int i,j;
1653
1654         if (!irq_ptr)
1655                 return;
1656
1657         irq_ptr->qib.pfmt=qib_param_field_format;
1658         if (qib_param_field)
1659                 memcpy(irq_ptr->qib.parm,qib_param_field,
1660                        QDIO_MAX_BUFFERS_PER_Q);
1661
1662         if (input_slib_elements)
1663                 for (i=0;i<no_input_qs;i++) {
1664                         for (j=0;j<QDIO_MAX_BUFFERS_PER_Q;j++)
1665                                 irq_ptr->input_qs[i]->slib->slibe[j].parms=
1666                                         input_slib_elements[
1667                                                 i*QDIO_MAX_BUFFERS_PER_Q+j];
1668                 }
1669         if (output_slib_elements)
1670                 for (i=0;i<no_output_qs;i++) {
1671                         for (j=0;j<QDIO_MAX_BUFFERS_PER_Q;j++)
1672                                 irq_ptr->output_qs[i]->slib->slibe[j].parms=
1673                                         output_slib_elements[
1674                                                 i*QDIO_MAX_BUFFERS_PER_Q+j];
1675                 }
1676 }
1677
1678 static int
1679 qdio_alloc_qs(struct qdio_irq *irq_ptr,
1680               int no_input_qs, int no_output_qs)
1681 {
1682         int i;
1683         struct qdio_q *q;
1684
1685         for (i = 0; i < no_input_qs; i++) {
1686                 q = kmem_cache_alloc(qdio_q_cache, GFP_KERNEL);
1687                 if (!q)
1688                         return -ENOMEM;
1689                 memset(q, 0, sizeof(*q));
1690
1691                 q->slib = (struct slib *) __get_free_page(GFP_KERNEL);
1692                 if (!q->slib) {
1693                         kmem_cache_free(qdio_q_cache, q);
1694                         return -ENOMEM;
1695                 }
1696                 irq_ptr->input_qs[i]=q;
1697         }
1698
1699         for (i = 0; i < no_output_qs; i++) {
1700                 q = kmem_cache_alloc(qdio_q_cache, GFP_KERNEL);
1701                 if (!q)
1702                         return -ENOMEM;
1703                 memset(q, 0, sizeof(*q));
1704
1705                 q->slib = (struct slib *) __get_free_page(GFP_KERNEL);
1706                 if (!q->slib) {
1707                         kmem_cache_free(qdio_q_cache, q);
1708                         return -ENOMEM;
1709                 }
1710                 irq_ptr->output_qs[i]=q;
1711         }
1712         return 0;
1713 }
1714
1715 static void
1716 qdio_fill_qs(struct qdio_irq *irq_ptr, struct ccw_device *cdev,
1717              int no_input_qs, int no_output_qs,
1718              qdio_handler_t *input_handler,
1719              qdio_handler_t *output_handler,
1720              unsigned long int_parm,int q_format,
1721              unsigned long flags,
1722              void **inbound_sbals_array,
1723              void **outbound_sbals_array)
1724 {
1725         struct qdio_q *q;
1726         int i,j;
1727         char dbf_text[20]; /* see qdio_initialize */
1728         void *ptr;
1729         int available;
1730
1731         sprintf(dbf_text,"qfqs%4x",cdev->private->schid.sch_no);
1732         QDIO_DBF_TEXT0(0,setup,dbf_text);
1733         for (i=0;i<no_input_qs;i++) {
1734                 q=irq_ptr->input_qs[i];
1735
1736                 memset(q,0,((char*)&q->slib)-((char*)q));
1737                 sprintf(dbf_text,"in-q%4x",i);
1738                 QDIO_DBF_TEXT0(0,setup,dbf_text);
1739                 QDIO_DBF_HEX0(0,setup,&q,sizeof(void*));
1740
1741                 memset(q->slib,0,PAGE_SIZE);
1742                 q->sl=(struct sl*)(((char*)q->slib)+PAGE_SIZE/2);
1743
1744                 available=0;
1745
1746                 for (j=0;j<QDIO_MAX_BUFFERS_PER_Q;j++)
1747                         q->sbal[j]=*(inbound_sbals_array++);
1748
1749                 q->queue_type=q_format;
1750                 q->int_parm=int_parm;
1751                 q->schid = irq_ptr->schid;
1752                 q->irq_ptr = irq_ptr;
1753                 q->cdev = cdev;
1754                 q->mask=1<<(31-i);
1755                 q->q_no=i;
1756                 q->is_input_q=1;
1757                 q->first_to_check=0;
1758                 q->last_move_ftc=0;
1759                 q->handler=input_handler;
1760                 q->dev_st_chg_ind=irq_ptr->dev_st_chg_ind;
1761
1762                 q->tasklet.data=(unsigned long)q;
1763                 /* q->is_thinint_q isn't valid at this time, but
1764                  * irq_ptr->is_thinint_irq is */
1765                 q->tasklet.func=(void(*)(unsigned long))
1766                         ((irq_ptr->is_thinint_irq)?&tiqdio_inbound_processing:
1767                          &qdio_inbound_processing);
1768
1769                 /* actually this is not used for inbound queues. yet. */
1770                 atomic_set(&q->busy_siga_counter,0);
1771                 q->timing.busy_start=0;
1772
1773 /*              for (j=0;j<QDIO_STATS_NUMBER;j++)
1774                         q->timing.last_transfer_times[j]=(qdio_get_micros()/
1775                                                           QDIO_STATS_NUMBER)*j;
1776                 q->timing.last_transfer_index=QDIO_STATS_NUMBER-1;
1777 */
1778
1779                 /* fill in slib */
1780                 if (i>0) irq_ptr->input_qs[i-1]->slib->nsliba=
1781                                  (unsigned long)(q->slib);
1782                 q->slib->sla=(unsigned long)(q->sl);
1783                 q->slib->slsba=(unsigned long)(&q->slsb.acc.val[0]);
1784
1785                 /* fill in sl */
1786                 for (j=0;j<QDIO_MAX_BUFFERS_PER_Q;j++)
1787                         q->sl->element[j].sbal=(unsigned long)(q->sbal[j]);
1788
1789                 QDIO_DBF_TEXT2(0,setup,"sl-sb-b0");
1790                 ptr=(void*)q->sl;
1791                 QDIO_DBF_HEX2(0,setup,&ptr,sizeof(void*));
1792                 ptr=(void*)&q->slsb;
1793                 QDIO_DBF_HEX2(0,setup,&ptr,sizeof(void*));
1794                 ptr=(void*)q->sbal[0];
1795                 QDIO_DBF_HEX2(0,setup,&ptr,sizeof(void*));
1796
1797                 /* fill in slsb */
1798                 if (!irq_ptr->is_qebsm) {
1799                         unsigned int count = 1;
1800                         for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; j++)
1801                                 set_slsb(q, &j, SLSB_P_INPUT_NOT_INIT, &count);
1802                 }
1803         }
1804
1805         for (i=0;i<no_output_qs;i++) {
1806                 q=irq_ptr->output_qs[i];
1807                 memset(q,0,((char*)&q->slib)-((char*)q));
1808
1809                 sprintf(dbf_text,"outq%4x",i);
1810                 QDIO_DBF_TEXT0(0,setup,dbf_text);
1811                 QDIO_DBF_HEX0(0,setup,&q,sizeof(void*));
1812
1813                 memset(q->slib,0,PAGE_SIZE);
1814                 q->sl=(struct sl*)(((char*)q->slib)+PAGE_SIZE/2);
1815
1816                 available=0;
1817
1818                 for (j=0;j<QDIO_MAX_BUFFERS_PER_Q;j++)
1819                         q->sbal[j]=*(outbound_sbals_array++);
1820
1821                 q->queue_type=q_format;
1822                 if ((q->queue_type == QDIO_IQDIO_QFMT) &&
1823                     (no_output_qs > 1) &&
1824                     (i == no_output_qs-1))
1825                         q->queue_type = QDIO_IQDIO_QFMT_ASYNCH;
1826                 q->int_parm=int_parm;
1827                 q->is_input_q=0;
1828                 q->is_pci_out = 0;
1829                 q->schid = irq_ptr->schid;
1830                 q->cdev = cdev;
1831                 q->irq_ptr = irq_ptr;
1832                 q->mask=1<<(31-i);
1833                 q->q_no=i;
1834                 q->first_to_check=0;
1835                 q->last_move_ftc=0;
1836                 q->handler=output_handler;
1837
1838                 q->tasklet.data=(unsigned long)q;
1839                 q->tasklet.func=(void(*)(unsigned long))
1840                         &qdio_outbound_processing;
1841                 q->timer.function=(void(*)(unsigned long))
1842                         &qdio_outbound_processing;
1843                 q->timer.data = (long)q;
1844                 init_timer(&q->timer);
1845
1846                 atomic_set(&q->busy_siga_counter,0);
1847                 q->timing.busy_start=0;
1848
1849                 /* fill in slib */
1850                 if (i>0) irq_ptr->output_qs[i-1]->slib->nsliba=
1851                                  (unsigned long)(q->slib);
1852                 q->slib->sla=(unsigned long)(q->sl);
1853                 q->slib->slsba=(unsigned long)(&q->slsb.acc.val[0]);
1854
1855                 /* fill in sl */
1856                 for (j=0;j<QDIO_MAX_BUFFERS_PER_Q;j++)
1857                         q->sl->element[j].sbal=(unsigned long)(q->sbal[j]);
1858
1859                 QDIO_DBF_TEXT2(0,setup,"sl-sb-b0");
1860                 ptr=(void*)q->sl;
1861                 QDIO_DBF_HEX2(0,setup,&ptr,sizeof(void*));
1862                 ptr=(void*)&q->slsb;
1863                 QDIO_DBF_HEX2(0,setup,&ptr,sizeof(void*));
1864                 ptr=(void*)q->sbal[0];
1865                 QDIO_DBF_HEX2(0,setup,&ptr,sizeof(void*));
1866
1867                 /* fill in slsb */
1868                 if (!irq_ptr->is_qebsm) {
1869                         unsigned int count = 1;
1870                         for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; j++)
1871                                 set_slsb(q, &j, SLSB_P_OUTPUT_NOT_INIT, &count);
1872                 }
1873         }
1874 }
1875
1876 static void
1877 qdio_fill_thresholds(struct qdio_irq *irq_ptr,
1878                      unsigned int no_input_qs,
1879                      unsigned int no_output_qs,
1880                      unsigned int min_input_threshold,
1881                      unsigned int max_input_threshold,
1882                      unsigned int min_output_threshold,
1883                      unsigned int max_output_threshold)
1884 {
1885         int i;
1886         struct qdio_q *q;
1887
1888         for (i=0;i<no_input_qs;i++) {
1889                 q=irq_ptr->input_qs[i];
1890                 q->timing.threshold=max_input_threshold;
1891 /*              for (j=0;j<QDIO_STATS_CLASSES;j++) {
1892                         q->threshold_classes[j].threshold=
1893                                 min_input_threshold+
1894                                 (max_input_threshold-min_input_threshold)/
1895                                 QDIO_STATS_CLASSES;
1896                 }
1897                 qdio_use_thresholds(q,QDIO_STATS_CLASSES/2);*/
1898         }
1899         for (i=0;i<no_output_qs;i++) {
1900                 q=irq_ptr->output_qs[i];
1901                 q->timing.threshold=max_output_threshold;
1902 /*              for (j=0;j<QDIO_STATS_CLASSES;j++) {
1903                         q->threshold_classes[j].threshold=
1904                                 min_output_threshold+
1905                                 (max_output_threshold-min_output_threshold)/
1906                                 QDIO_STATS_CLASSES;
1907                 }
1908                 qdio_use_thresholds(q,QDIO_STATS_CLASSES/2);*/
1909         }
1910 }
1911
1912 static int
1913 tiqdio_thinint_handler(void)
1914 {
1915         QDIO_DBF_TEXT4(0,trace,"thin_int");
1916
1917         qdio_perf_stat_inc(&perf_stats.thinints);
1918
1919         /* SVS only when needed:
1920          * issue SVS to benefit from iqdio interrupt avoidance
1921          * (SVS clears AISOI)*/
1922         if (!omit_svs)
1923                 tiqdio_clear_global_summary();
1924
1925         tiqdio_inbound_checks();
1926         return 0;
1927 }
1928
1929 static void
1930 qdio_set_state(struct qdio_irq *irq_ptr, enum qdio_irq_states state)
1931 {
1932         int i;
1933 #ifdef CONFIG_QDIO_DEBUG
1934         char dbf_text[15];
1935
1936         QDIO_DBF_TEXT5(0,trace,"newstate");
1937         sprintf(dbf_text,"%4x%4x",irq_ptr->schid.sch_no,state);
1938         QDIO_DBF_TEXT5(0,trace,dbf_text);
1939 #endif /* CONFIG_QDIO_DEBUG */
1940
1941         irq_ptr->state=state;
1942         for (i=0;i<irq_ptr->no_input_qs;i++)
1943                 irq_ptr->input_qs[i]->state=state;
1944         for (i=0;i<irq_ptr->no_output_qs;i++)
1945                 irq_ptr->output_qs[i]->state=state;
1946         mb();
1947 }
1948
1949 static void
1950 qdio_irq_check_sense(struct subchannel_id schid, struct irb *irb)
1951 {
1952         char dbf_text[15];
1953
1954         if (irb->esw.esw0.erw.cons) {
1955                 sprintf(dbf_text,"sens%4x",schid.sch_no);
1956                 QDIO_DBF_TEXT2(1,trace,dbf_text);
1957                 QDIO_DBF_HEX0(0,sense,irb,QDIO_DBF_SENSE_LEN);
1958
1959                 QDIO_PRINT_WARN("sense data available on qdio channel.\n");
1960                 QDIO_HEXDUMP16(WARN,"irb: ",irb);
1961                 QDIO_HEXDUMP16(WARN,"sense data: ",irb->ecw);
1962         }
1963
1964 }
1965
1966 static void
1967 qdio_handle_pci(struct qdio_irq *irq_ptr)
1968 {
1969         int i;
1970         struct qdio_q *q;
1971
1972         qdio_perf_stat_inc(&perf_stats.pcis);
1973         for (i=0;i<irq_ptr->no_input_qs;i++) {
1974                 q=irq_ptr->input_qs[i];
1975                 if (q->is_input_q&QDIO_FLAG_NO_INPUT_INTERRUPT_CONTEXT)
1976                         qdio_mark_q(q);
1977                 else {
1978                         qdio_perf_stat_dec(&perf_stats.tl_runs);
1979                         __qdio_inbound_processing(q);
1980                 }
1981         }
1982         if (!irq_ptr->hydra_gives_outbound_pcis)
1983                 return;
1984         for (i=0;i<irq_ptr->no_output_qs;i++) {
1985                 q=irq_ptr->output_qs[i];
1986                 if (qdio_is_outbound_q_done(q))
1987                         continue;
1988                 qdio_perf_stat_dec(&perf_stats.tl_runs);
1989                 if (!irq_ptr->sync_done_on_outb_pcis)
1990                         SYNC_MEMORY;
1991                 __qdio_outbound_processing(q);
1992         }
1993 }
1994
1995 static void qdio_establish_handle_irq(struct ccw_device*, int, int);
1996
1997 static void
1998 qdio_handle_activate_check(struct ccw_device *cdev, unsigned long intparm,
1999                            int cstat, int dstat)
2000 {
2001         struct qdio_irq *irq_ptr;
2002         struct qdio_q *q;
2003         char dbf_text[15];
2004
2005         irq_ptr = cdev->private->qdio_data;
2006
2007         QDIO_DBF_TEXT2(1, trace, "ick2");
2008         sprintf(dbf_text,"%s", cdev->dev.bus_id);
2009         QDIO_DBF_TEXT2(1,trace,dbf_text);
2010         QDIO_DBF_HEX2(0,trace,&intparm,sizeof(int));
2011         QDIO_DBF_HEX2(0,trace,&dstat,sizeof(int));
2012         QDIO_DBF_HEX2(0,trace,&cstat,sizeof(int));
2013         QDIO_PRINT_ERR("received check condition on activate " \
2014                        "queues on device %s (cs=x%x, ds=x%x).\n",
2015                        cdev->dev.bus_id, cstat, dstat);
2016         if (irq_ptr->no_input_qs) {
2017                 q=irq_ptr->input_qs[0];
2018         } else if (irq_ptr->no_output_qs) {
2019                 q=irq_ptr->output_qs[0];
2020         } else {
2021                 QDIO_PRINT_ERR("oops... no queue registered for device %s!?\n",
2022                                cdev->dev.bus_id);
2023                 goto omit_handler_call;
2024         }
2025         q->handler(q->cdev,QDIO_STATUS_ACTIVATE_CHECK_CONDITION|
2026                    QDIO_STATUS_LOOK_FOR_ERROR,
2027                    0,0,0,-1,-1,q->int_parm);
2028 omit_handler_call:
2029         qdio_set_state(irq_ptr,QDIO_IRQ_STATE_STOPPED);
2030
2031 }
2032
2033 static void
2034 qdio_call_shutdown(struct work_struct *work)
2035 {
2036         struct ccw_device_private *priv;
2037         struct ccw_device *cdev;
2038
2039         priv = container_of(work, struct ccw_device_private, kick_work);
2040         cdev = priv->cdev;
2041         qdio_shutdown(cdev, QDIO_FLAG_CLEANUP_USING_CLEAR);
2042         put_device(&cdev->dev);
2043 }
2044
2045 static void
2046 qdio_timeout_handler(struct ccw_device *cdev)
2047 {
2048         struct qdio_irq *irq_ptr;
2049         char dbf_text[15];
2050
2051         QDIO_DBF_TEXT2(0, trace, "qtoh");
2052         sprintf(dbf_text, "%s", cdev->dev.bus_id);
2053         QDIO_DBF_TEXT2(0, trace, dbf_text);
2054
2055         irq_ptr = cdev->private->qdio_data;
2056         sprintf(dbf_text, "state:%d", irq_ptr->state);
2057         QDIO_DBF_TEXT2(0, trace, dbf_text);
2058
2059         switch (irq_ptr->state) {
2060         case QDIO_IRQ_STATE_INACTIVE:
2061                 QDIO_PRINT_ERR("establish queues on irq 0.%x.%04x: timed out\n",
2062                                irq_ptr->schid.ssid, irq_ptr->schid.sch_no);
2063                 QDIO_DBF_TEXT2(1,setup,"eq:timeo");
2064                 qdio_set_state(irq_ptr, QDIO_IRQ_STATE_ERR);
2065                 break;
2066         case QDIO_IRQ_STATE_CLEANUP:
2067                 QDIO_PRINT_INFO("Did not get interrupt on cleanup, "
2068                                 "irq=0.%x.%x.\n",
2069                                 irq_ptr->schid.ssid, irq_ptr->schid.sch_no);
2070                 qdio_set_state(irq_ptr, QDIO_IRQ_STATE_ERR);
2071                 break;
2072         case QDIO_IRQ_STATE_ESTABLISHED:
2073         case QDIO_IRQ_STATE_ACTIVE:
2074                 /* I/O has been terminated by common I/O layer. */
2075                 QDIO_PRINT_INFO("Queues on irq 0.%x.%04x killed by cio.\n",
2076                                 irq_ptr->schid.ssid, irq_ptr->schid.sch_no);
2077                 QDIO_DBF_TEXT2(1, trace, "cio:term");
2078                 qdio_set_state(irq_ptr, QDIO_IRQ_STATE_STOPPED);
2079                 if (get_device(&cdev->dev)) {
2080                         /* Can't call shutdown from interrupt context. */
2081                         PREPARE_WORK(&cdev->private->kick_work,
2082                                      qdio_call_shutdown);
2083                         queue_work(ccw_device_work, &cdev->private->kick_work);
2084                 }
2085                 break;
2086         default:
2087                 BUG();
2088         }
2089         ccw_device_set_timeout(cdev, 0);
2090         wake_up(&cdev->private->wait_q);
2091 }
2092
2093 static void
2094 qdio_handler(struct ccw_device *cdev, unsigned long intparm, struct irb *irb)
2095 {
2096         struct qdio_irq *irq_ptr;
2097         int cstat,dstat;
2098         char dbf_text[15];
2099
2100 #ifdef CONFIG_QDIO_DEBUG
2101         QDIO_DBF_TEXT4(0, trace, "qint");
2102         sprintf(dbf_text, "%s", cdev->dev.bus_id);
2103         QDIO_DBF_TEXT4(0, trace, dbf_text);
2104 #endif /* CONFIG_QDIO_DEBUG */
2105
2106         if (!intparm) {
2107                 QDIO_PRINT_ERR("got unsolicited interrupt in qdio " \
2108                                   "handler, device %s\n", cdev->dev.bus_id);
2109                 return;
2110         }
2111
2112         irq_ptr = cdev->private->qdio_data;
2113         if (!irq_ptr) {
2114                 QDIO_DBF_TEXT2(1, trace, "uint");
2115                 sprintf(dbf_text,"%s", cdev->dev.bus_id);
2116                 QDIO_DBF_TEXT2(1,trace,dbf_text);
2117                 QDIO_PRINT_ERR("received interrupt on unused device %s!\n",
2118                                cdev->dev.bus_id);
2119                 return;
2120         }
2121
2122         if (IS_ERR(irb)) {
2123                 /* Currently running i/o is in error. */
2124                 switch (PTR_ERR(irb)) {
2125                 case -EIO:
2126                         QDIO_PRINT_ERR("i/o error on device %s\n",
2127                                        cdev->dev.bus_id);
2128                         return;
2129                 case -ETIMEDOUT:
2130                         qdio_timeout_handler(cdev);
2131                         return;
2132                 default:
2133                         QDIO_PRINT_ERR("unknown error state %ld on device %s\n",
2134                                        PTR_ERR(irb), cdev->dev.bus_id);
2135                         return;
2136                 }
2137         }
2138
2139         qdio_irq_check_sense(irq_ptr->schid, irb);
2140
2141 #ifdef CONFIG_QDIO_DEBUG
2142         sprintf(dbf_text, "state:%d", irq_ptr->state);
2143         QDIO_DBF_TEXT4(0, trace, dbf_text);
2144 #endif /* CONFIG_QDIO_DEBUG */
2145
2146         cstat = irb->scsw.cstat;
2147         dstat = irb->scsw.dstat;
2148
2149         switch (irq_ptr->state) {
2150         case QDIO_IRQ_STATE_INACTIVE:
2151                 qdio_establish_handle_irq(cdev, cstat, dstat);
2152                 break;
2153
2154         case QDIO_IRQ_STATE_CLEANUP:
2155                 qdio_set_state(irq_ptr, QDIO_IRQ_STATE_INACTIVE);
2156                 break;
2157
2158         case QDIO_IRQ_STATE_ESTABLISHED:
2159         case QDIO_IRQ_STATE_ACTIVE:
2160                 if (cstat & SCHN_STAT_PCI) {
2161                         qdio_handle_pci(irq_ptr);
2162                         break;
2163                 }
2164
2165                 if ((cstat&~SCHN_STAT_PCI)||dstat) {
2166                         qdio_handle_activate_check(cdev, intparm, cstat, dstat);
2167                         break;
2168                 }
2169         default:
2170                 QDIO_PRINT_ERR("got interrupt for queues in state %d on " \
2171                                "device %s?!\n",
2172                                irq_ptr->state, cdev->dev.bus_id);
2173         }
2174         wake_up(&cdev->private->wait_q);
2175
2176 }
2177
2178 int
2179 qdio_synchronize(struct ccw_device *cdev, unsigned int flags,
2180                  unsigned int queue_number)
2181 {
2182         int cc = 0;
2183         struct qdio_q *q;
2184         struct qdio_irq *irq_ptr;
2185         void *ptr;
2186 #ifdef CONFIG_QDIO_DEBUG
2187         char dbf_text[15]="SyncXXXX";
2188 #endif
2189
2190         irq_ptr = cdev->private->qdio_data;
2191         if (!irq_ptr)
2192                 return -ENODEV;
2193
2194 #ifdef CONFIG_QDIO_DEBUG
2195         *((int*)(&dbf_text[4])) = irq_ptr->schid.sch_no;
2196         QDIO_DBF_HEX4(0,trace,dbf_text,QDIO_DBF_TRACE_LEN);
2197         *((int*)(&dbf_text[0]))=flags;
2198         *((int*)(&dbf_text[4]))=queue_number;
2199         QDIO_DBF_HEX4(0,trace,dbf_text,QDIO_DBF_TRACE_LEN);
2200 #endif /* CONFIG_QDIO_DEBUG */
2201
2202         if (flags&QDIO_FLAG_SYNC_INPUT) {
2203                 q=irq_ptr->input_qs[queue_number];
2204                 if (!q)
2205                         return -EINVAL;
2206                 if (!(irq_ptr->is_qebsm))
2207                         cc = do_siga_sync(q->schid, 0, q->mask);
2208         } else if (flags&QDIO_FLAG_SYNC_OUTPUT) {
2209                 q=irq_ptr->output_qs[queue_number];
2210                 if (!q)
2211                         return -EINVAL;
2212                 if (!(irq_ptr->is_qebsm))
2213                         cc = do_siga_sync(q->schid, q->mask, 0);
2214         } else
2215                 return -EINVAL;
2216
2217         ptr=&cc;
2218         if (cc)
2219                 QDIO_DBF_HEX3(0,trace,&ptr,sizeof(int));
2220
2221         return cc;
2222 }
2223
2224 static void
2225 qdio_check_subchannel_qebsm(struct qdio_irq *irq_ptr, unsigned char qdioac,
2226                             unsigned long token)
2227 {
2228         struct qdio_q *q;
2229         int i;
2230         unsigned int count, start_buf;
2231         char dbf_text[15];
2232
2233         /*check if QEBSM is disabled */
2234         if (!(irq_ptr->is_qebsm) || !(qdioac & 0x01)) {
2235                 irq_ptr->is_qebsm  = 0;
2236                 irq_ptr->sch_token = 0;
2237                 irq_ptr->qib.rflags &= ~QIB_RFLAGS_ENABLE_QEBSM;
2238                 QDIO_DBF_TEXT0(0,setup,"noV=V");
2239                 return;
2240         }
2241         irq_ptr->sch_token = token;
2242         /*input queue*/
2243         for (i = 0; i < irq_ptr->no_input_qs;i++) {
2244                 q = irq_ptr->input_qs[i];
2245                 count = QDIO_MAX_BUFFERS_PER_Q;
2246                 start_buf = 0;
2247                 set_slsb(q, &start_buf, SLSB_P_INPUT_NOT_INIT, &count);
2248         }
2249         sprintf(dbf_text,"V=V:%2x",irq_ptr->is_qebsm);
2250         QDIO_DBF_TEXT0(0,setup,dbf_text);
2251         sprintf(dbf_text,"%8lx",irq_ptr->sch_token);
2252         QDIO_DBF_TEXT0(0,setup,dbf_text);
2253         /*output queue*/
2254         for (i = 0; i < irq_ptr->no_output_qs; i++) {
2255                 q = irq_ptr->output_qs[i];
2256                 count = QDIO_MAX_BUFFERS_PER_Q;
2257                 start_buf = 0;
2258                 set_slsb(q, &start_buf, SLSB_P_OUTPUT_NOT_INIT, &count);
2259         }
2260 }
2261
2262 static void
2263 qdio_get_ssqd_information(struct qdio_irq *irq_ptr)
2264 {
2265         int result;
2266         unsigned char qdioac;
2267         struct {
2268                 struct chsc_header request;
2269                 u16 reserved1:10;
2270                 u16 ssid:2;
2271                 u16 fmt:4;
2272                 u16 first_sch;
2273                 u16 reserved2;
2274                 u16 last_sch;
2275                 u32 reserved3;
2276                 struct chsc_header response;
2277                 u32 reserved4;
2278                 u8  flags;
2279                 u8  reserved5;
2280                 u16 sch;
2281                 u8  qfmt;
2282                 u8  parm;
2283                 u8  qdioac1;
2284                 u8  sch_class;
2285                 u8  reserved7;
2286                 u8  icnt;
2287                 u8  reserved8;
2288                 u8  ocnt;
2289                 u8 reserved9;
2290                 u8 mbccnt;
2291                 u16 qdioac2;
2292                 u64 sch_token;
2293         } *ssqd_area;
2294
2295         QDIO_DBF_TEXT0(0,setup,"getssqd");
2296         qdioac = 0;
2297         ssqd_area = mempool_alloc(qdio_mempool_scssc, GFP_ATOMIC);
2298         if (!ssqd_area) {
2299                 QDIO_PRINT_WARN("Could not get memory for chsc. Using all " \
2300                                 "SIGAs for sch x%x.\n", irq_ptr->schid.sch_no);
2301                 irq_ptr->qdioac = CHSC_FLAG_SIGA_INPUT_NECESSARY |
2302                                   CHSC_FLAG_SIGA_OUTPUT_NECESSARY |
2303                                   CHSC_FLAG_SIGA_SYNC_NECESSARY; /* all flags set */
2304                 irq_ptr->is_qebsm = 0;
2305                 irq_ptr->sch_token = 0;
2306                 irq_ptr->qib.rflags &= ~QIB_RFLAGS_ENABLE_QEBSM;
2307                 return;
2308         }
2309
2310         ssqd_area->request = (struct chsc_header) {
2311                 .length = 0x0010,
2312                 .code   = 0x0024,
2313         };
2314         ssqd_area->first_sch = irq_ptr->schid.sch_no;
2315         ssqd_area->last_sch = irq_ptr->schid.sch_no;
2316         ssqd_area->ssid = irq_ptr->schid.ssid;
2317         result = chsc(ssqd_area);
2318
2319         if (result) {
2320                 QDIO_PRINT_WARN("CHSC returned cc %i. Using all " \
2321                                 "SIGAs for sch 0.%x.%x.\n", result,
2322                                 irq_ptr->schid.ssid, irq_ptr->schid.sch_no);
2323                 qdioac = CHSC_FLAG_SIGA_INPUT_NECESSARY |
2324                         CHSC_FLAG_SIGA_OUTPUT_NECESSARY |
2325                         CHSC_FLAG_SIGA_SYNC_NECESSARY; /* all flags set */
2326                 irq_ptr->is_qebsm  = 0;
2327                 goto out;
2328         }
2329
2330         if (ssqd_area->response.code != QDIO_CHSC_RESPONSE_CODE_OK) {
2331                 QDIO_PRINT_WARN("response upon checking SIGA needs " \
2332                                 "is 0x%x. Using all SIGAs for sch 0.%x.%x.\n",
2333                                 ssqd_area->response.code,
2334                                 irq_ptr->schid.ssid, irq_ptr->schid.sch_no);
2335                 qdioac = CHSC_FLAG_SIGA_INPUT_NECESSARY |
2336                         CHSC_FLAG_SIGA_OUTPUT_NECESSARY |
2337                         CHSC_FLAG_SIGA_SYNC_NECESSARY; /* all flags set */
2338                 irq_ptr->is_qebsm  = 0;
2339                 goto out;
2340         }
2341         if (!(ssqd_area->flags & CHSC_FLAG_QDIO_CAPABILITY) ||
2342             !(ssqd_area->flags & CHSC_FLAG_VALIDITY) ||
2343             (ssqd_area->sch != irq_ptr->schid.sch_no)) {
2344                 QDIO_PRINT_WARN("huh? problems checking out sch 0.%x.%x... " \
2345                                 "using all SIGAs.\n",
2346                                 irq_ptr->schid.ssid, irq_ptr->schid.sch_no);
2347                 qdioac = CHSC_FLAG_SIGA_INPUT_NECESSARY |
2348                         CHSC_FLAG_SIGA_OUTPUT_NECESSARY |
2349                         CHSC_FLAG_SIGA_SYNC_NECESSARY; /* worst case */
2350                 irq_ptr->is_qebsm  = 0;
2351                 goto out;
2352         }
2353         qdioac = ssqd_area->qdioac1;
2354 out:
2355         qdio_check_subchannel_qebsm(irq_ptr, qdioac,
2356                                     ssqd_area->sch_token);
2357         mempool_free(ssqd_area, qdio_mempool_scssc);
2358         irq_ptr->qdioac = qdioac;
2359 }
2360
2361 static unsigned int
2362 tiqdio_check_chsc_availability(void)
2363 {
2364         char dbf_text[15];
2365
2366         if (!css_characteristics_avail)
2367                 return -EIO;
2368
2369         /* Check for bit 41. */
2370         if (!css_general_characteristics.aif) {
2371                 QDIO_PRINT_WARN("Adapter interruption facility not " \
2372                                 "installed.\n");
2373                 return -ENOENT;
2374         }
2375
2376         /* Check for bits 107 and 108. */
2377         if (!css_chsc_characteristics.scssc ||
2378             !css_chsc_characteristics.scsscf) {
2379                 QDIO_PRINT_WARN("Set Chan Subsys. Char. & Fast-CHSCs " \
2380                                 "not available.\n");
2381                 return -ENOENT;
2382         }
2383
2384         /* Check for OSA/FCP thin interrupts (bit 67). */
2385         hydra_thinints = css_general_characteristics.aif_osa;
2386         sprintf(dbf_text,"hydrati%1x", hydra_thinints);
2387         QDIO_DBF_TEXT0(0,setup,dbf_text);
2388
2389 #ifdef CONFIG_64BIT
2390         /* Check for QEBSM support in general (bit 58). */
2391         is_passthrough = css_general_characteristics.qebsm;
2392 #endif
2393         sprintf(dbf_text,"cssQBS:%1x", is_passthrough);
2394         QDIO_DBF_TEXT0(0,setup,dbf_text);
2395
2396         /* Check for aif time delay disablement fac (bit 56). If installed,
2397          * omit svs even under lpar (good point by rick again) */
2398         omit_svs = css_general_characteristics.aif_tdd;
2399         sprintf(dbf_text,"omitsvs%1x", omit_svs);
2400         QDIO_DBF_TEXT0(0,setup,dbf_text);
2401         return 0;
2402 }
2403
2404
2405 static unsigned int
2406 tiqdio_set_subchannel_ind(struct qdio_irq *irq_ptr, int reset_to_zero)
2407 {
2408         unsigned long real_addr_local_summary_bit;
2409         unsigned long real_addr_dev_st_chg_ind;
2410         void *ptr;
2411         char dbf_text[15];
2412
2413         unsigned int resp_code;
2414         int result;
2415
2416         struct {
2417                 struct chsc_header request;
2418                 u16 operation_code;
2419                 u16 reserved1;
2420                 u32 reserved2;
2421                 u32 reserved3;
2422                 u64 summary_indicator_addr;
2423                 u64 subchannel_indicator_addr;
2424                 u32 ks:4;
2425                 u32 kc:4;
2426                 u32 reserved4:21;
2427                 u32 isc:3;
2428                 u32 word_with_d_bit;
2429                 /* set to 0x10000000 to enable
2430                  * time delay disablement facility */
2431                 u32 reserved5;
2432                 struct subchannel_id schid;
2433                 u32 reserved6[1004];
2434                 struct chsc_header response;
2435                 u32 reserved7;
2436         } *scssc_area;
2437
2438         if (!irq_ptr->is_thinint_irq)
2439                 return -ENODEV;
2440
2441         if (reset_to_zero) {
2442                 real_addr_local_summary_bit=0;
2443                 real_addr_dev_st_chg_ind=0;
2444         } else {
2445                 real_addr_local_summary_bit=
2446                         virt_to_phys((volatile void *)indicators);
2447                 real_addr_dev_st_chg_ind=
2448                         virt_to_phys((volatile void *)irq_ptr->dev_st_chg_ind);
2449         }
2450
2451         scssc_area = mempool_alloc(qdio_mempool_scssc, GFP_ATOMIC);
2452         if (!scssc_area) {
2453                 QDIO_PRINT_WARN("No memory for setting indicators on " \
2454                                 "subchannel 0.%x.%x.\n",
2455                                 irq_ptr->schid.ssid, irq_ptr->schid.sch_no);
2456                 return -ENOMEM;
2457         }
2458         scssc_area->request = (struct chsc_header) {
2459                 .length = 0x0fe0,
2460                 .code   = 0x0021,
2461         };
2462         scssc_area->operation_code = 0;
2463
2464         scssc_area->summary_indicator_addr = real_addr_local_summary_bit;
2465         scssc_area->subchannel_indicator_addr = real_addr_dev_st_chg_ind;
2466         scssc_area->ks = QDIO_STORAGE_KEY;
2467         scssc_area->kc = QDIO_STORAGE_KEY;
2468         scssc_area->isc = TIQDIO_THININT_ISC;
2469         scssc_area->schid = irq_ptr->schid;
2470         /* enables the time delay disablement facility. Don't care
2471          * whether it is really there (i.e. we haven't checked for
2472          * it) */
2473         if (css_general_characteristics.aif_tdd)
2474                 scssc_area->word_with_d_bit = 0x10000000;
2475         else
2476                 QDIO_PRINT_WARN("Time delay disablement facility " \
2477                                 "not available\n");
2478
2479         result = chsc(scssc_area);
2480         if (result) {
2481                 QDIO_PRINT_WARN("could not set indicators on irq 0.%x.%x, " \
2482                                 "cc=%i.\n",
2483                                 irq_ptr->schid.ssid, irq_ptr->schid.sch_no,result);
2484                 result = -EIO;
2485                 goto out;
2486         }
2487
2488         resp_code = scssc_area->response.code;
2489         if (resp_code!=QDIO_CHSC_RESPONSE_CODE_OK) {
2490                 QDIO_PRINT_WARN("response upon setting indicators " \
2491                                 "is 0x%x.\n",resp_code);
2492                 sprintf(dbf_text,"sidR%4x",resp_code);
2493                 QDIO_DBF_TEXT1(0,trace,dbf_text);
2494                 QDIO_DBF_TEXT1(0,setup,dbf_text);
2495                 ptr=&scssc_area->response;
2496                 QDIO_DBF_HEX2(1,setup,&ptr,QDIO_DBF_SETUP_LEN);
2497                 result = -EIO;
2498                 goto out;
2499         }
2500
2501         QDIO_DBF_TEXT2(0,setup,"setscind");
2502         QDIO_DBF_HEX2(0,setup,&real_addr_local_summary_bit,
2503                       sizeof(unsigned long));
2504         QDIO_DBF_HEX2(0,setup,&real_addr_dev_st_chg_ind,sizeof(unsigned long));
2505         result = 0;
2506 out:
2507         mempool_free(scssc_area, qdio_mempool_scssc);
2508         return result;
2509
2510 }
2511
2512 static unsigned int
2513 tiqdio_set_delay_target(struct qdio_irq *irq_ptr, unsigned long delay_target)
2514 {
2515         unsigned int resp_code;
2516         int result;
2517         void *ptr;
2518         char dbf_text[15];
2519
2520         struct {
2521                 struct chsc_header request;
2522                 u16 operation_code;
2523                 u16 reserved1;
2524                 u32 reserved2;
2525                 u32 reserved3;
2526                 u32 reserved4[2];
2527                 u32 delay_target;
2528                 u32 reserved5[1009];
2529                 struct chsc_header response;
2530                 u32 reserved6;
2531         } *scsscf_area;
2532
2533         if (!irq_ptr->is_thinint_irq)
2534                 return -ENODEV;
2535
2536         scsscf_area = mempool_alloc(qdio_mempool_scssc, GFP_ATOMIC);
2537         if (!scsscf_area) {
2538                 QDIO_PRINT_WARN("No memory for setting delay target on " \
2539                                 "subchannel 0.%x.%x.\n",
2540                                 irq_ptr->schid.ssid, irq_ptr->schid.sch_no);
2541                 return -ENOMEM;
2542         }
2543         scsscf_area->request = (struct chsc_header) {
2544                 .length = 0x0fe0,
2545                 .code   = 0x1027,
2546         };
2547
2548         scsscf_area->delay_target = delay_target<<16;
2549
2550         result=chsc(scsscf_area);
2551         if (result) {
2552                 QDIO_PRINT_WARN("could not set delay target on irq 0.%x.%x, " \
2553                                 "cc=%i. Continuing.\n",
2554                                 irq_ptr->schid.ssid, irq_ptr->schid.sch_no,
2555                                 result);
2556                 result = -EIO;
2557                 goto out;
2558         }
2559
2560         resp_code = scsscf_area->response.code;
2561         if (resp_code!=QDIO_CHSC_RESPONSE_CODE_OK) {
2562                 QDIO_PRINT_WARN("response upon setting delay target " \
2563                                 "is 0x%x. Continuing.\n",resp_code);
2564                 sprintf(dbf_text,"sdtR%4x",resp_code);
2565                 QDIO_DBF_TEXT1(0,trace,dbf_text);
2566                 QDIO_DBF_TEXT1(0,setup,dbf_text);
2567                 ptr=&scsscf_area->response;
2568                 QDIO_DBF_HEX2(1,trace,&ptr,QDIO_DBF_TRACE_LEN);
2569         }
2570         QDIO_DBF_TEXT2(0,trace,"delytrgt");
2571         QDIO_DBF_HEX2(0,trace,&delay_target,sizeof(unsigned long));
2572         result = 0; /* not critical */
2573 out:
2574         mempool_free(scsscf_area, qdio_mempool_scssc);
2575         return result;
2576 }
2577
2578 int
2579 qdio_cleanup(struct ccw_device *cdev, int how)
2580 {
2581         struct qdio_irq *irq_ptr;
2582         char dbf_text[15];
2583         int rc;
2584
2585         irq_ptr = cdev->private->qdio_data;
2586         if (!irq_ptr)
2587                 return -ENODEV;
2588
2589         sprintf(dbf_text,"qcln%4x",irq_ptr->schid.sch_no);
2590         QDIO_DBF_TEXT1(0,trace,dbf_text);
2591         QDIO_DBF_TEXT0(0,setup,dbf_text);
2592
2593         rc = qdio_shutdown(cdev, how);
2594         if ((rc == 0) || (rc == -EINPROGRESS))
2595                 rc = qdio_free(cdev);
2596         return rc;
2597 }
2598
2599 int
2600 qdio_shutdown(struct ccw_device *cdev, int how)
2601 {
2602         struct qdio_irq *irq_ptr;
2603         int i;
2604         int result = 0;
2605         int rc;
2606         unsigned long flags;
2607         int timeout;
2608         char dbf_text[15];
2609
2610         irq_ptr = cdev->private->qdio_data;
2611         if (!irq_ptr)
2612                 return -ENODEV;
2613
2614         down(&irq_ptr->setting_up_sema);
2615
2616         sprintf(dbf_text,"qsqs%4x",irq_ptr->schid.sch_no);
2617         QDIO_DBF_TEXT1(0,trace,dbf_text);
2618         QDIO_DBF_TEXT0(0,setup,dbf_text);
2619
2620         /* mark all qs as uninteresting */
2621         for (i=0;i<irq_ptr->no_input_qs;i++)
2622                 atomic_set(&irq_ptr->input_qs[i]->is_in_shutdown,1);
2623
2624         for (i=0;i<irq_ptr->no_output_qs;i++)
2625                 atomic_set(&irq_ptr->output_qs[i]->is_in_shutdown,1);
2626
2627         tasklet_kill(&tiqdio_tasklet);
2628
2629         for (i=0;i<irq_ptr->no_input_qs;i++) {
2630                 qdio_unmark_q(irq_ptr->input_qs[i]);
2631                 tasklet_kill(&irq_ptr->input_qs[i]->tasklet);
2632                 wait_event_interruptible_timeout(cdev->private->wait_q,
2633                                                  !atomic_read(&irq_ptr->
2634                                                               input_qs[i]->
2635                                                               use_count),
2636                                                  QDIO_NO_USE_COUNT_TIMEOUT);
2637                 if (atomic_read(&irq_ptr->input_qs[i]->use_count))
2638                         result=-EINPROGRESS;
2639         }
2640
2641         for (i=0;i<irq_ptr->no_output_qs;i++) {
2642                 tasklet_kill(&irq_ptr->output_qs[i]->tasklet);
2643                 del_timer(&irq_ptr->output_qs[i]->timer);
2644                 wait_event_interruptible_timeout(cdev->private->wait_q,
2645                                                  !atomic_read(&irq_ptr->
2646                                                               output_qs[i]->
2647                                                               use_count),
2648                                                  QDIO_NO_USE_COUNT_TIMEOUT);
2649                 if (atomic_read(&irq_ptr->output_qs[i]->use_count))
2650                         result=-EINPROGRESS;
2651         }
2652
2653         /* cleanup subchannel */
2654         spin_lock_irqsave(get_ccwdev_lock(cdev),flags);
2655         if (how&QDIO_FLAG_CLEANUP_USING_CLEAR) {
2656                 rc = ccw_device_clear(cdev, QDIO_DOING_CLEANUP);
2657                 timeout=QDIO_CLEANUP_CLEAR_TIMEOUT;
2658         } else if (how&QDIO_FLAG_CLEANUP_USING_HALT) {
2659                 rc = ccw_device_halt(cdev, QDIO_DOING_CLEANUP);
2660                 timeout=QDIO_CLEANUP_HALT_TIMEOUT;
2661         } else { /* default behaviour */
2662                 rc = ccw_device_halt(cdev, QDIO_DOING_CLEANUP);
2663                 timeout=QDIO_CLEANUP_HALT_TIMEOUT;
2664         }
2665         if (rc == -ENODEV) {
2666                 /* No need to wait for device no longer present. */
2667                 qdio_set_state(irq_ptr, QDIO_IRQ_STATE_INACTIVE);
2668                 spin_unlock_irqrestore(get_ccwdev_lock(cdev), flags);
2669         } else if (((void *)cdev->handler != (void *)qdio_handler) && rc == 0) {
2670                 /*
2671                  * Whoever put another handler there, has to cope with the
2672                  * interrupt theirself. Might happen if qdio_shutdown was
2673                  * called on already shutdown queues, but this shouldn't have
2674                  * bad side effects.
2675                  */
2676                 qdio_set_state(irq_ptr, QDIO_IRQ_STATE_INACTIVE);
2677                 spin_unlock_irqrestore(get_ccwdev_lock(cdev), flags);
2678         } else if (rc == 0) {
2679                 qdio_set_state(irq_ptr, QDIO_IRQ_STATE_CLEANUP);
2680                 ccw_device_set_timeout(cdev, timeout);
2681                 spin_unlock_irqrestore(get_ccwdev_lock(cdev),flags);
2682
2683                 wait_event(cdev->private->wait_q,
2684                            irq_ptr->state == QDIO_IRQ_STATE_INACTIVE ||
2685                            irq_ptr->state == QDIO_IRQ_STATE_ERR);
2686         } else {
2687                 QDIO_PRINT_INFO("ccw_device_{halt,clear} returned %d for "
2688                                 "device %s\n", result, cdev->dev.bus_id);
2689                 spin_unlock_irqrestore(get_ccwdev_lock(cdev), flags);
2690                 result = rc;
2691                 goto out;
2692         }
2693         if (irq_ptr->is_thinint_irq) {
2694                 qdio_put_indicator((__u32*)irq_ptr->dev_st_chg_ind);
2695                 tiqdio_set_subchannel_ind(irq_ptr,1);
2696                 /* reset adapter interrupt indicators */
2697         }
2698
2699         /* exchange int handlers, if necessary */
2700         if ((void*)cdev->handler == (void*)qdio_handler)
2701                 cdev->handler=irq_ptr->original_int_handler;
2702
2703         /* Ignore errors. */
2704         qdio_set_state(irq_ptr, QDIO_IRQ_STATE_INACTIVE);
2705         ccw_device_set_timeout(cdev, 0);
2706 out:
2707         up(&irq_ptr->setting_up_sema);
2708         return result;
2709 }
2710
2711 int
2712 qdio_free(struct ccw_device *cdev)
2713 {
2714         struct qdio_irq *irq_ptr;
2715         char dbf_text[15];
2716
2717         irq_ptr = cdev->private->qdio_data;
2718         if (!irq_ptr)
2719                 return -ENODEV;
2720
2721         down(&irq_ptr->setting_up_sema);
2722
2723         sprintf(dbf_text,"qfqs%4x",irq_ptr->schid.sch_no);
2724         QDIO_DBF_TEXT1(0,trace,dbf_text);
2725         QDIO_DBF_TEXT0(0,setup,dbf_text);
2726
2727         cdev->private->qdio_data = NULL;
2728
2729         up(&irq_ptr->setting_up_sema);
2730
2731         qdio_release_irq_memory(irq_ptr);
2732         module_put(THIS_MODULE);
2733         return 0;
2734 }
2735
2736 static void
2737 qdio_allocate_do_dbf(struct qdio_initialize *init_data)
2738 {
2739         char dbf_text[20]; /* if a printf printed out more than 8 chars */
2740
2741         sprintf(dbf_text,"qfmt:%x",init_data->q_format);
2742         QDIO_DBF_TEXT0(0,setup,dbf_text);
2743         QDIO_DBF_HEX0(0,setup,init_data->adapter_name,8);
2744         sprintf(dbf_text,"qpff%4x",init_data->qib_param_field_format);
2745         QDIO_DBF_TEXT0(0,setup,dbf_text);
2746         QDIO_DBF_HEX0(0,setup,&init_data->qib_param_field,sizeof(char*));
2747         QDIO_DBF_HEX0(0,setup,&init_data->input_slib_elements,sizeof(long*));
2748         QDIO_DBF_HEX0(0,setup,&init_data->output_slib_elements,sizeof(long*));
2749         sprintf(dbf_text,"miit%4x",init_data->min_input_threshold);
2750         QDIO_DBF_TEXT0(0,setup,dbf_text);
2751         sprintf(dbf_text,"mait%4x",init_data->max_input_threshold);
2752         QDIO_DBF_TEXT0(0,setup,dbf_text);
2753         sprintf(dbf_text,"miot%4x",init_data->min_output_threshold);
2754         QDIO_DBF_TEXT0(0,setup,dbf_text);
2755         sprintf(dbf_text,"maot%4x",init_data->max_output_threshold);
2756         QDIO_DBF_TEXT0(0,setup,dbf_text);
2757         sprintf(dbf_text,"niq:%4x",init_data->no_input_qs);
2758         QDIO_DBF_TEXT0(0,setup,dbf_text);
2759         sprintf(dbf_text,"noq:%4x",init_data->no_output_qs);
2760         QDIO_DBF_TEXT0(0,setup,dbf_text);
2761         QDIO_DBF_HEX0(0,setup,&init_data->input_handler,sizeof(void*));
2762         QDIO_DBF_HEX0(0,setup,&init_data->output_handler,sizeof(void*));
2763         QDIO_DBF_HEX0(0,setup,&init_data->int_parm,sizeof(long));
2764         QDIO_DBF_HEX0(0,setup,&init_data->flags,sizeof(long));
2765         QDIO_DBF_HEX0(0,setup,&init_data->input_sbal_addr_array,sizeof(void*));
2766         QDIO_DBF_HEX0(0,setup,&init_data->output_sbal_addr_array,sizeof(void*));
2767 }
2768
2769 static void
2770 qdio_allocate_fill_input_desc(struct qdio_irq *irq_ptr, int i, int iqfmt)
2771 {
2772         irq_ptr->input_qs[i]->is_iqdio_q = iqfmt;
2773         irq_ptr->input_qs[i]->is_thinint_q = irq_ptr->is_thinint_irq;
2774
2775         irq_ptr->qdr->qdf0[i].sliba=(unsigned long)(irq_ptr->input_qs[i]->slib);
2776
2777         irq_ptr->qdr->qdf0[i].sla=(unsigned long)(irq_ptr->input_qs[i]->sl);
2778
2779         irq_ptr->qdr->qdf0[i].slsba=
2780                 (unsigned long)(&irq_ptr->input_qs[i]->slsb.acc.val[0]);
2781
2782         irq_ptr->qdr->qdf0[i].akey=QDIO_STORAGE_KEY;
2783         irq_ptr->qdr->qdf0[i].bkey=QDIO_STORAGE_KEY;
2784         irq_ptr->qdr->qdf0[i].ckey=QDIO_STORAGE_KEY;
2785         irq_ptr->qdr->qdf0[i].dkey=QDIO_STORAGE_KEY;
2786 }
2787
2788 static void
2789 qdio_allocate_fill_output_desc(struct qdio_irq *irq_ptr, int i,
2790                                int j, int iqfmt)
2791 {
2792         irq_ptr->output_qs[i]->is_iqdio_q = iqfmt;
2793         irq_ptr->output_qs[i]->is_thinint_q = irq_ptr->is_thinint_irq;
2794
2795         irq_ptr->qdr->qdf0[i+j].sliba=(unsigned long)(irq_ptr->output_qs[i]->slib);
2796
2797         irq_ptr->qdr->qdf0[i+j].sla=(unsigned long)(irq_ptr->output_qs[i]->sl);
2798
2799         irq_ptr->qdr->qdf0[i+j].slsba=
2800                 (unsigned long)(&irq_ptr->output_qs[i]->slsb.acc.val[0]);
2801
2802         irq_ptr->qdr->qdf0[i+j].akey=QDIO_STORAGE_KEY;
2803         irq_ptr->qdr->qdf0[i+j].bkey=QDIO_STORAGE_KEY;
2804         irq_ptr->qdr->qdf0[i+j].ckey=QDIO_STORAGE_KEY;
2805         irq_ptr->qdr->qdf0[i+j].dkey=QDIO_STORAGE_KEY;
2806 }
2807
2808
2809 static void
2810 qdio_initialize_set_siga_flags_input(struct qdio_irq *irq_ptr)
2811 {
2812         int i;
2813
2814         for (i=0;i<irq_ptr->no_input_qs;i++) {
2815                 irq_ptr->input_qs[i]->siga_sync=
2816                         irq_ptr->qdioac&CHSC_FLAG_SIGA_SYNC_NECESSARY;
2817                 irq_ptr->input_qs[i]->siga_in=
2818                         irq_ptr->qdioac&CHSC_FLAG_SIGA_INPUT_NECESSARY;
2819                 irq_ptr->input_qs[i]->siga_out=
2820                         irq_ptr->qdioac&CHSC_FLAG_SIGA_OUTPUT_NECESSARY;
2821                 irq_ptr->input_qs[i]->siga_sync_done_on_thinints=
2822                         irq_ptr->qdioac&CHSC_FLAG_SIGA_SYNC_DONE_ON_THININTS;
2823                 irq_ptr->input_qs[i]->hydra_gives_outbound_pcis=
2824                         irq_ptr->hydra_gives_outbound_pcis;
2825                 irq_ptr->input_qs[i]->siga_sync_done_on_outb_tis=
2826                         ((irq_ptr->qdioac&
2827                           (CHSC_FLAG_SIGA_SYNC_DONE_ON_OUTB_PCIS|
2828                            CHSC_FLAG_SIGA_SYNC_DONE_ON_THININTS))==
2829                          (CHSC_FLAG_SIGA_SYNC_DONE_ON_OUTB_PCIS|
2830                           CHSC_FLAG_SIGA_SYNC_DONE_ON_THININTS));
2831
2832         }
2833 }
2834
2835 static void
2836 qdio_initialize_set_siga_flags_output(struct qdio_irq *irq_ptr)
2837 {
2838         int i;
2839
2840         for (i=0;i<irq_ptr->no_output_qs;i++) {
2841                 irq_ptr->output_qs[i]->siga_sync=
2842                         irq_ptr->qdioac&CHSC_FLAG_SIGA_SYNC_NECESSARY;
2843                 irq_ptr->output_qs[i]->siga_in=
2844                         irq_ptr->qdioac&CHSC_FLAG_SIGA_INPUT_NECESSARY;
2845                 irq_ptr->output_qs[i]->siga_out=
2846                         irq_ptr->qdioac&CHSC_FLAG_SIGA_OUTPUT_NECESSARY;
2847                 irq_ptr->output_qs[i]->siga_sync_done_on_thinints=
2848                         irq_ptr->qdioac&CHSC_FLAG_SIGA_SYNC_DONE_ON_THININTS;
2849                 irq_ptr->output_qs[i]->hydra_gives_outbound_pcis=
2850                         irq_ptr->hydra_gives_outbound_pcis;
2851                 irq_ptr->output_qs[i]->siga_sync_done_on_outb_tis=
2852                         ((irq_ptr->qdioac&
2853                           (CHSC_FLAG_SIGA_SYNC_DONE_ON_OUTB_PCIS|
2854                            CHSC_FLAG_SIGA_SYNC_DONE_ON_THININTS))==
2855                          (CHSC_FLAG_SIGA_SYNC_DONE_ON_OUTB_PCIS|
2856                           CHSC_FLAG_SIGA_SYNC_DONE_ON_THININTS));
2857
2858         }
2859 }
2860
2861 static int
2862 qdio_establish_irq_check_for_errors(struct ccw_device *cdev, int cstat,
2863                                     int dstat)
2864 {
2865         char dbf_text[15];
2866         struct qdio_irq *irq_ptr;
2867
2868         irq_ptr = cdev->private->qdio_data;
2869
2870         if (cstat || (dstat & ~(DEV_STAT_CHN_END|DEV_STAT_DEV_END))) {
2871                 sprintf(dbf_text,"ick1%4x",irq_ptr->schid.sch_no);
2872                 QDIO_DBF_TEXT2(1,trace,dbf_text);
2873                 QDIO_DBF_HEX2(0,trace,&dstat,sizeof(int));
2874                 QDIO_DBF_HEX2(0,trace,&cstat,sizeof(int));
2875                 QDIO_PRINT_ERR("received check condition on establish " \
2876                                "queues on irq 0.%x.%x (cs=x%x, ds=x%x).\n",
2877                                irq_ptr->schid.ssid, irq_ptr->schid.sch_no,
2878                                cstat,dstat);
2879                 qdio_set_state(irq_ptr,QDIO_IRQ_STATE_ERR);
2880         }
2881
2882         if (!(dstat & DEV_STAT_DEV_END)) {
2883                 QDIO_DBF_TEXT2(1,setup,"eq:no de");
2884                 QDIO_DBF_HEX2(0,setup,&dstat, sizeof(dstat));
2885                 QDIO_DBF_HEX2(0,setup,&cstat, sizeof(cstat));
2886                 QDIO_PRINT_ERR("establish queues on irq 0.%x.%04x: didn't get "
2887                                "device end: dstat=%02x, cstat=%02x\n",
2888                                irq_ptr->schid.ssid, irq_ptr->schid.sch_no,
2889                                dstat, cstat);
2890                 qdio_set_state(irq_ptr, QDIO_IRQ_STATE_ERR);
2891                 return 1;
2892         }
2893
2894         if (dstat & ~(DEV_STAT_CHN_END|DEV_STAT_DEV_END)) {
2895                 QDIO_DBF_TEXT2(1,setup,"eq:badio");
2896                 QDIO_DBF_HEX2(0,setup,&dstat, sizeof(dstat));
2897                 QDIO_DBF_HEX2(0,setup,&cstat, sizeof(cstat));
2898                 QDIO_PRINT_ERR("establish queues on irq 0.%x.%04x: got "
2899                                "the following devstat: dstat=%02x, "
2900                                "cstat=%02x\n", irq_ptr->schid.ssid,
2901                                irq_ptr->schid.sch_no, dstat, cstat);
2902                 qdio_set_state(irq_ptr, QDIO_IRQ_STATE_ERR);
2903                 return 1;
2904         }
2905         return 0;
2906 }
2907
2908 static void
2909 qdio_establish_handle_irq(struct ccw_device *cdev, int cstat, int dstat)
2910 {
2911         struct qdio_irq *irq_ptr;
2912         char dbf_text[15];
2913
2914         irq_ptr = cdev->private->qdio_data;
2915
2916         sprintf(dbf_text,"qehi%4x",cdev->private->schid.sch_no);
2917         QDIO_DBF_TEXT0(0,setup,dbf_text);
2918         QDIO_DBF_TEXT0(0,trace,dbf_text);
2919
2920         if (qdio_establish_irq_check_for_errors(cdev, cstat, dstat)) {
2921                 ccw_device_set_timeout(cdev, 0);
2922                 return;
2923         }
2924
2925         qdio_set_state(irq_ptr,QDIO_IRQ_STATE_ESTABLISHED);
2926         ccw_device_set_timeout(cdev, 0);
2927 }
2928
2929 int
2930 qdio_initialize(struct qdio_initialize *init_data)
2931 {
2932         int rc;
2933         char dbf_text[15];
2934
2935         sprintf(dbf_text,"qini%4x",init_data->cdev->private->schid.sch_no);
2936         QDIO_DBF_TEXT0(0,setup,dbf_text);
2937         QDIO_DBF_TEXT0(0,trace,dbf_text);
2938
2939         rc = qdio_allocate(init_data);
2940         if (rc == 0) {
2941                 rc = qdio_establish(init_data);
2942                 if (rc != 0)
2943                         qdio_free(init_data->cdev);
2944         }
2945
2946         return rc;
2947 }
2948
2949
2950 int
2951 qdio_allocate(struct qdio_initialize *init_data)
2952 {
2953         struct qdio_irq *irq_ptr;
2954         char dbf_text[15];
2955
2956         sprintf(dbf_text,"qalc%4x",init_data->cdev->private->schid.sch_no);
2957         QDIO_DBF_TEXT0(0,setup,dbf_text);
2958         QDIO_DBF_TEXT0(0,trace,dbf_text);
2959         if ( (init_data->no_input_qs>QDIO_MAX_QUEUES_PER_IRQ) ||
2960              (init_data->no_output_qs>QDIO_MAX_QUEUES_PER_IRQ) ||
2961              ((init_data->no_input_qs) && (!init_data->input_handler)) ||
2962              ((init_data->no_output_qs) && (!init_data->output_handler)) )
2963                 return -EINVAL;
2964
2965         if (!init_data->input_sbal_addr_array)
2966                 return -EINVAL;
2967
2968         if (!init_data->output_sbal_addr_array)
2969                 return -EINVAL;
2970
2971         qdio_allocate_do_dbf(init_data);
2972
2973         /* create irq */
2974         irq_ptr = (void *) get_zeroed_page(GFP_KERNEL | GFP_DMA);
2975
2976         QDIO_DBF_TEXT0(0,setup,"irq_ptr:");
2977         QDIO_DBF_HEX0(0,setup,&irq_ptr,sizeof(void*));
2978
2979         if (!irq_ptr) {
2980                 QDIO_PRINT_ERR("allocation of irq_ptr failed!\n");
2981                 return -ENOMEM;
2982         }
2983
2984         init_MUTEX(&irq_ptr->setting_up_sema);
2985
2986         /* QDR must be in DMA area since CCW data address is only 32 bit */
2987         irq_ptr->qdr = (struct qdr *) __get_free_page(GFP_KERNEL | GFP_DMA);
2988         if (!(irq_ptr->qdr)) {
2989                 free_page((unsigned long) irq_ptr);
2990                 QDIO_PRINT_ERR("allocation of irq_ptr->qdr failed!\n");
2991                 return -ENOMEM;
2992         }
2993         QDIO_DBF_TEXT0(0,setup,"qdr:");
2994         QDIO_DBF_HEX0(0,setup,&irq_ptr->qdr,sizeof(void*));
2995
2996         if (qdio_alloc_qs(irq_ptr,
2997                           init_data->no_input_qs,
2998                           init_data->no_output_qs)) {
2999                 QDIO_PRINT_ERR("queue allocation failed!\n");
3000                 qdio_release_irq_memory(irq_ptr);
3001                 return -ENOMEM;
3002         }
3003
3004         init_data->cdev->private->qdio_data = irq_ptr;
3005
3006         qdio_set_state(irq_ptr,QDIO_IRQ_STATE_INACTIVE);
3007
3008         return 0;
3009 }
3010
3011 static int qdio_fill_irq(struct qdio_initialize *init_data)
3012 {
3013         int i;
3014         char dbf_text[15];
3015         struct ciw *ciw;
3016         int is_iqdio;
3017         struct qdio_irq *irq_ptr;
3018
3019         irq_ptr = init_data->cdev->private->qdio_data;
3020
3021         memset(irq_ptr,0,((char*)&irq_ptr->qdr)-((char*)irq_ptr));
3022
3023         /* wipes qib.ac, required by ar7063 */
3024         memset(irq_ptr->qdr,0,sizeof(struct qdr));
3025
3026         irq_ptr->int_parm=init_data->int_parm;
3027
3028         irq_ptr->schid = ccw_device_get_subchannel_id(init_data->cdev);
3029         irq_ptr->no_input_qs=init_data->no_input_qs;
3030         irq_ptr->no_output_qs=init_data->no_output_qs;
3031
3032         if (init_data->q_format==QDIO_IQDIO_QFMT) {
3033                 irq_ptr->is_iqdio_irq=1;
3034                 irq_ptr->is_thinint_irq=1;
3035         } else {
3036                 irq_ptr->is_iqdio_irq=0;
3037                 irq_ptr->is_thinint_irq=hydra_thinints;
3038         }
3039         sprintf(dbf_text,"is_i_t%1x%1x",
3040                 irq_ptr->is_iqdio_irq,irq_ptr->is_thinint_irq);
3041         QDIO_DBF_TEXT2(0,setup,dbf_text);
3042
3043         if (irq_ptr->is_thinint_irq) {
3044                 irq_ptr->dev_st_chg_ind = qdio_get_indicator();
3045                 QDIO_DBF_HEX1(0,setup,&irq_ptr->dev_st_chg_ind,sizeof(void*));
3046                 if (!irq_ptr->dev_st_chg_ind) {
3047                         QDIO_PRINT_WARN("no indicator location available " \
3048                                         "for irq 0.%x.%x\n",
3049                                         irq_ptr->schid.ssid, irq_ptr->schid.sch_no);
3050                         qdio_release_irq_memory(irq_ptr);
3051                         return -ENOBUFS;
3052                 }
3053         }
3054
3055         /* defaults */
3056         irq_ptr->equeue.cmd=DEFAULT_ESTABLISH_QS_CMD;
3057         irq_ptr->equeue.count=DEFAULT_ESTABLISH_QS_COUNT;
3058         irq_ptr->aqueue.cmd=DEFAULT_ACTIVATE_QS_CMD;
3059         irq_ptr->aqueue.count=DEFAULT_ACTIVATE_QS_COUNT;
3060
3061         qdio_fill_qs(irq_ptr, init_data->cdev,
3062                      init_data->no_input_qs,
3063                      init_data->no_output_qs,
3064                      init_data->input_handler,
3065                      init_data->output_handler,init_data->int_parm,
3066                      init_data->q_format,init_data->flags,
3067                      init_data->input_sbal_addr_array,
3068                      init_data->output_sbal_addr_array);
3069
3070         if (!try_module_get(THIS_MODULE)) {
3071                 QDIO_PRINT_CRIT("try_module_get() failed!\n");
3072                 qdio_release_irq_memory(irq_ptr);
3073                 return -EINVAL;
3074         }
3075
3076         qdio_fill_thresholds(irq_ptr,init_data->no_input_qs,
3077                              init_data->no_output_qs,
3078                              init_data->min_input_threshold,
3079                              init_data->max_input_threshold,
3080                              init_data->min_output_threshold,
3081                              init_data->max_output_threshold);
3082
3083         /* fill in qdr */
3084         irq_ptr->qdr->qfmt=init_data->q_format;
3085         irq_ptr->qdr->iqdcnt=init_data->no_input_qs;
3086         irq_ptr->qdr->oqdcnt=init_data->no_output_qs;
3087         irq_ptr->qdr->iqdsz=sizeof(struct qdesfmt0)/4; /* size in words */
3088         irq_ptr->qdr->oqdsz=sizeof(struct qdesfmt0)/4;
3089
3090         irq_ptr->qdr->qiba=(unsigned long)&irq_ptr->qib;
3091         irq_ptr->qdr->qkey=QDIO_STORAGE_KEY;
3092
3093         /* fill in qib */
3094         irq_ptr->is_qebsm = is_passthrough;
3095         if (irq_ptr->is_qebsm)
3096                 irq_ptr->qib.rflags |= QIB_RFLAGS_ENABLE_QEBSM;
3097
3098         irq_ptr->qib.qfmt=init_data->q_format;
3099         if (init_data->no_input_qs)
3100                 irq_ptr->qib.isliba=(unsigned long)(irq_ptr->input_qs[0]->slib);
3101         if (init_data->no_output_qs)
3102                 irq_ptr->qib.osliba=(unsigned long)(irq_ptr->output_qs[0]->slib);
3103         memcpy(irq_ptr->qib.ebcnam,init_data->adapter_name,8);
3104
3105         qdio_set_impl_params(irq_ptr,init_data->qib_param_field_format,
3106                              init_data->qib_param_field,
3107                              init_data->no_input_qs,
3108                              init_data->no_output_qs,
3109                              init_data->input_slib_elements,
3110                              init_data->output_slib_elements);
3111
3112         /* first input descriptors, then output descriptors */
3113         is_iqdio = (init_data->q_format == QDIO_IQDIO_QFMT) ? 1 : 0;
3114         for (i=0;i<init_data->no_input_qs;i++)
3115                 qdio_allocate_fill_input_desc(irq_ptr, i, is_iqdio);
3116
3117         for (i=0;i<init_data->no_output_qs;i++)
3118                 qdio_allocate_fill_output_desc(irq_ptr, i,
3119                                                init_data->no_input_qs,
3120                                                is_iqdio);
3121
3122         /* qdr, qib, sls, slsbs, slibs, sbales filled. */
3123
3124         /* get qdio commands */
3125         ciw = ccw_device_get_ciw(init_data->cdev, CIW_TYPE_EQUEUE);
3126         if (!ciw) {
3127                 QDIO_DBF_TEXT2(1,setup,"no eq");
3128                 QDIO_PRINT_INFO("No equeue CIW found for QDIO commands. "
3129                                 "Trying to use default.\n");
3130         } else
3131                 irq_ptr->equeue = *ciw;
3132         ciw = ccw_device_get_ciw(init_data->cdev, CIW_TYPE_AQUEUE);
3133         if (!ciw) {
3134                 QDIO_DBF_TEXT2(1,setup,"no aq");
3135                 QDIO_PRINT_INFO("No aqueue CIW found for QDIO commands. "
3136                                 "Trying to use default.\n");
3137         } else
3138                 irq_ptr->aqueue = *ciw;
3139
3140         /* Set new interrupt handler. */
3141         irq_ptr->original_int_handler = init_data->cdev->handler;
3142         init_data->cdev->handler = qdio_handler;
3143
3144         return 0;
3145 }
3146
3147 int
3148 qdio_establish(struct qdio_initialize *init_data)
3149 {
3150         struct qdio_irq *irq_ptr;
3151         unsigned long saveflags;
3152         int result, result2;
3153         struct ccw_device *cdev;
3154         char dbf_text[20];
3155
3156         cdev=init_data->cdev;
3157         irq_ptr = cdev->private->qdio_data;
3158         if (!irq_ptr)
3159                 return -EINVAL;
3160
3161         if (cdev->private->state != DEV_STATE_ONLINE)
3162                 return -EINVAL;
3163
3164         down(&irq_ptr->setting_up_sema);
3165
3166         qdio_fill_irq(init_data);
3167
3168         /* the thinint CHSC stuff */
3169         if (irq_ptr->is_thinint_irq) {
3170
3171                 result = tiqdio_set_subchannel_ind(irq_ptr,0);
3172                 if (result) {
3173                         up(&irq_ptr->setting_up_sema);
3174                         qdio_shutdown(cdev, QDIO_FLAG_CLEANUP_USING_CLEAR);
3175                         return result;
3176                 }
3177                 tiqdio_set_delay_target(irq_ptr,TIQDIO_DELAY_TARGET);
3178         }
3179
3180         sprintf(dbf_text,"qest%4x",cdev->private->schid.sch_no);
3181         QDIO_DBF_TEXT0(0,setup,dbf_text);
3182         QDIO_DBF_TEXT0(0,trace,dbf_text);
3183
3184         /* establish q */
3185         irq_ptr->ccw.cmd_code=irq_ptr->equeue.cmd;
3186         irq_ptr->ccw.flags=CCW_FLAG_SLI;
3187         irq_ptr->ccw.count=irq_ptr->equeue.count;
3188         irq_ptr->ccw.cda=QDIO_GET_ADDR(irq_ptr->qdr);
3189
3190         spin_lock_irqsave(get_ccwdev_lock(cdev),saveflags);
3191
3192         ccw_device_set_options_mask(cdev, 0);
3193         result=ccw_device_start_timeout(cdev,&irq_ptr->ccw,
3194                                         QDIO_DOING_ESTABLISH,0, 0,
3195                                         QDIO_ESTABLISH_TIMEOUT);
3196         if (result) {
3197                 result2=ccw_device_start_timeout(cdev,&irq_ptr->ccw,
3198                                                  QDIO_DOING_ESTABLISH,0,0,
3199                                                  QDIO_ESTABLISH_TIMEOUT);
3200                 sprintf(dbf_text,"eq:io%4x",result);
3201                 QDIO_DBF_TEXT2(1,setup,dbf_text);
3202                 if (result2) {
3203                         sprintf(dbf_text,"eq:io%4x",result);
3204                         QDIO_DBF_TEXT2(1,setup,dbf_text);
3205                 }
3206                 QDIO_PRINT_WARN("establish queues on irq 0.%x.%04x: do_IO " \
3207                                 "returned %i, next try returned %i\n",
3208                                 irq_ptr->schid.ssid, irq_ptr->schid.sch_no,
3209                                 result, result2);
3210                 result=result2;
3211                 if (result)
3212                         ccw_device_set_timeout(cdev, 0);
3213         }
3214
3215         spin_unlock_irqrestore(get_ccwdev_lock(cdev),saveflags);
3216
3217         if (result) {
3218                 up(&irq_ptr->setting_up_sema);
3219                 qdio_shutdown(cdev,QDIO_FLAG_CLEANUP_USING_CLEAR);
3220                 return result;
3221         }
3222
3223         /* Timeout is cared for already by using ccw_device_start_timeout(). */
3224         wait_event_interruptible(cdev->private->wait_q,
3225                  irq_ptr->state == QDIO_IRQ_STATE_ESTABLISHED ||
3226                  irq_ptr->state == QDIO_IRQ_STATE_ERR);
3227
3228         if (irq_ptr->state == QDIO_IRQ_STATE_ESTABLISHED)
3229                 result = 0;
3230         else {
3231                 up(&irq_ptr->setting_up_sema);
3232                 qdio_shutdown(cdev, QDIO_FLAG_CLEANUP_USING_CLEAR);
3233                 return -EIO;
3234         }
3235
3236         qdio_get_ssqd_information(irq_ptr);
3237         /* if this gets set once, we're running under VM and can omit SVSes */
3238         if (irq_ptr->qdioac&CHSC_FLAG_SIGA_SYNC_NECESSARY)
3239                 omit_svs=1;
3240
3241         sprintf(dbf_text,"qdioac%2x",irq_ptr->qdioac);
3242         QDIO_DBF_TEXT2(0,setup,dbf_text);
3243
3244         sprintf(dbf_text,"qib ac%2x",irq_ptr->qib.ac);
3245         QDIO_DBF_TEXT2(0,setup,dbf_text);
3246
3247         irq_ptr->hydra_gives_outbound_pcis=
3248                 irq_ptr->qib.ac&QIB_AC_OUTBOUND_PCI_SUPPORTED;
3249         irq_ptr->sync_done_on_outb_pcis=
3250                 irq_ptr->qdioac&CHSC_FLAG_SIGA_SYNC_DONE_ON_OUTB_PCIS;
3251
3252         qdio_initialize_set_siga_flags_input(irq_ptr);
3253         qdio_initialize_set_siga_flags_output(irq_ptr);
3254
3255         up(&irq_ptr->setting_up_sema);
3256
3257         return result;
3258
3259 }
3260
3261 int
3262 qdio_activate(struct ccw_device *cdev, int flags)
3263 {
3264         struct qdio_irq *irq_ptr;
3265         int i,result=0,result2;
3266         unsigned long saveflags;
3267         char dbf_text[20]; /* see qdio_initialize */
3268
3269         irq_ptr = cdev->private->qdio_data;
3270         if (!irq_ptr)
3271                 return -ENODEV;
3272
3273         if (cdev->private->state != DEV_STATE_ONLINE)
3274                 return -EINVAL;
3275
3276         down(&irq_ptr->setting_up_sema);
3277         if (irq_ptr->state==QDIO_IRQ_STATE_INACTIVE) {
3278                 result=-EBUSY;
3279                 goto out;
3280         }
3281
3282         sprintf(dbf_text,"qact%4x", irq_ptr->schid.sch_no);
3283         QDIO_DBF_TEXT2(0,setup,dbf_text);
3284         QDIO_DBF_TEXT2(0,trace,dbf_text);
3285
3286         /* activate q */
3287         irq_ptr->ccw.cmd_code=irq_ptr->aqueue.cmd;
3288         irq_ptr->ccw.flags=CCW_FLAG_SLI;
3289         irq_ptr->ccw.count=irq_ptr->aqueue.count;
3290         irq_ptr->ccw.cda=QDIO_GET_ADDR(0);
3291
3292         spin_lock_irqsave(get_ccwdev_lock(cdev),saveflags);
3293
3294         ccw_device_set_timeout(cdev, 0);
3295         ccw_device_set_options(cdev, CCWDEV_REPORT_ALL);
3296         result=ccw_device_start(cdev,&irq_ptr->ccw,QDIO_DOING_ACTIVATE,
3297                                 0, DOIO_DENY_PREFETCH);
3298         if (result) {
3299                 result2=ccw_device_start(cdev,&irq_ptr->ccw,
3300                                          QDIO_DOING_ACTIVATE,0,0);
3301                 sprintf(dbf_text,"aq:io%4x",result);
3302                 QDIO_DBF_TEXT2(1,setup,dbf_text);
3303                 if (result2) {
3304                         sprintf(dbf_text,"aq:io%4x",result);
3305                         QDIO_DBF_TEXT2(1,setup,dbf_text);
3306                 }
3307                 QDIO_PRINT_WARN("activate queues on irq 0.%x.%04x: do_IO " \
3308                                 "returned %i, next try returned %i\n",
3309                                 irq_ptr->schid.ssid, irq_ptr->schid.sch_no,
3310                                 result, result2);
3311                 result=result2;
3312         }
3313
3314         spin_unlock_irqrestore(get_ccwdev_lock(cdev),saveflags);
3315         if (result)
3316                 goto out;
3317
3318         for (i=0;i<irq_ptr->no_input_qs;i++) {
3319                 if (irq_ptr->is_thinint_irq) {
3320                         /*
3321                          * that way we know, that, if we will get interrupted
3322                          * by tiqdio_inbound_processing, qdio_unmark_q will
3323                          * not be called
3324                          */
3325                         qdio_reserve_q(irq_ptr->input_qs[i]);
3326                         qdio_mark_tiq(irq_ptr->input_qs[i]);
3327                         qdio_release_q(irq_ptr->input_qs[i]);
3328                 }
3329         }
3330
3331         if (flags&QDIO_FLAG_NO_INPUT_INTERRUPT_CONTEXT) {
3332                 for (i=0;i<irq_ptr->no_input_qs;i++) {
3333                         irq_ptr->input_qs[i]->is_input_q|=
3334                                 QDIO_FLAG_NO_INPUT_INTERRUPT_CONTEXT;
3335                 }
3336         }
3337
3338         wait_event_interruptible_timeout(cdev->private->wait_q,
3339                                          ((irq_ptr->state ==
3340                                           QDIO_IRQ_STATE_STOPPED) ||
3341                                           (irq_ptr->state ==
3342                                            QDIO_IRQ_STATE_ERR)),
3343                                          QDIO_ACTIVATE_TIMEOUT);
3344
3345         switch (irq_ptr->state) {
3346         case QDIO_IRQ_STATE_STOPPED:
3347         case QDIO_IRQ_STATE_ERR:
3348                 up(&irq_ptr->setting_up_sema);
3349                 qdio_shutdown(cdev, QDIO_FLAG_CLEANUP_USING_CLEAR);
3350                 down(&irq_ptr->setting_up_sema);
3351                 result = -EIO;
3352                 break;
3353         default:
3354                 qdio_set_state(irq_ptr, QDIO_IRQ_STATE_ACTIVE);
3355                 result = 0;
3356         }
3357  out:
3358         up(&irq_ptr->setting_up_sema);
3359
3360         return result;
3361 }
3362
3363 /* buffers filled forwards again to make Rick happy */
3364 static void
3365 qdio_do_qdio_fill_input(struct qdio_q *q, unsigned int qidx,
3366                         unsigned int count, struct qdio_buffer *buffers)
3367 {
3368         struct qdio_irq *irq = (struct qdio_irq *) q->irq_ptr;
3369         int tmp = 0;
3370
3371         qidx &= (QDIO_MAX_BUFFERS_PER_Q - 1);
3372         if (irq->is_qebsm) {
3373                 while (count) {
3374                         tmp = set_slsb(q, &qidx, SLSB_CU_INPUT_EMPTY, &count);
3375                         if (!tmp)
3376                                 return;
3377                 }
3378                 return;
3379         }
3380         for (;;) {
3381                 set_slsb(q, &qidx, SLSB_CU_INPUT_EMPTY, &count);
3382                 count--;
3383                 if (!count) break;
3384                 qidx = (qidx + 1) & (QDIO_MAX_BUFFERS_PER_Q - 1);
3385         }
3386 }
3387
3388 static void
3389 qdio_do_qdio_fill_output(struct qdio_q *q, unsigned int qidx,
3390                          unsigned int count, struct qdio_buffer *buffers)
3391 {
3392         struct qdio_irq *irq = (struct qdio_irq *) q->irq_ptr;
3393         int tmp = 0;
3394
3395         qidx &= (QDIO_MAX_BUFFERS_PER_Q - 1);
3396         if (irq->is_qebsm) {
3397                 while (count) {
3398                         tmp = set_slsb(q, &qidx, SLSB_CU_OUTPUT_PRIMED, &count);
3399                         if (!tmp)
3400                                 return;
3401                 }
3402                 return;
3403         }
3404
3405         for (;;) {
3406                 set_slsb(q, &qidx, SLSB_CU_OUTPUT_PRIMED, &count);
3407                 count--;
3408                 if (!count) break;
3409                 qidx = (qidx + 1) & (QDIO_MAX_BUFFERS_PER_Q - 1);
3410         }
3411 }
3412
3413 static void
3414 do_qdio_handle_inbound(struct qdio_q *q, unsigned int callflags,
3415                        unsigned int qidx, unsigned int count,
3416                        struct qdio_buffer *buffers)
3417 {
3418         int used_elements;
3419
3420         /* This is the inbound handling of queues */
3421         used_elements=atomic_add_return(count, &q->number_of_buffers_used) - count;
3422
3423         qdio_do_qdio_fill_input(q,qidx,count,buffers);
3424
3425         if ((used_elements+count==QDIO_MAX_BUFFERS_PER_Q)&&
3426             (callflags&QDIO_FLAG_UNDER_INTERRUPT))
3427                 atomic_xchg(&q->polling,0);
3428
3429         if (used_elements)
3430                 return;
3431         if (callflags&QDIO_FLAG_DONT_SIGA)
3432                 return;
3433         if (q->siga_in) {
3434                 int result;
3435
3436                 result=qdio_siga_input(q);
3437                 if (result) {
3438                         if (q->siga_error)
3439                                 q->error_status_flags|=
3440                                         QDIO_STATUS_MORE_THAN_ONE_SIGA_ERROR;
3441                         q->error_status_flags|=QDIO_STATUS_LOOK_FOR_ERROR;
3442                         q->siga_error=result;
3443                 }
3444         }
3445
3446         qdio_mark_q(q);
3447 }
3448
3449 static void
3450 do_qdio_handle_outbound(struct qdio_q *q, unsigned int callflags,
3451                         unsigned int qidx, unsigned int count,
3452                         struct qdio_buffer *buffers)
3453 {
3454         int used_elements;
3455         unsigned int cnt, start_buf;
3456         unsigned char state = 0;
3457         struct qdio_irq *irq = (struct qdio_irq *) q->irq_ptr;
3458
3459         /* This is the outbound handling of queues */
3460         qdio_do_qdio_fill_output(q,qidx,count,buffers);
3461
3462         used_elements=atomic_add_return(count, &q->number_of_buffers_used) - count;
3463
3464         if (callflags&QDIO_FLAG_DONT_SIGA) {
3465                 qdio_perf_stat_inc(&perf_stats.outbound_cnt);
3466                 return;
3467         }
3468         if (callflags & QDIO_FLAG_PCI_OUT)
3469                 q->is_pci_out = 1;
3470         else
3471                 q->is_pci_out = 0;
3472         if (q->is_iqdio_q) {
3473                 /* one siga for every sbal */
3474                 while (count--)
3475                         qdio_kick_outbound_q(q);
3476
3477                 __qdio_outbound_processing(q);
3478         } else {
3479                 /* under VM, we do a SIGA sync unconditionally */
3480                 SYNC_MEMORY;
3481                 else {
3482                         /*
3483                          * w/o shadow queues (else branch of
3484                          * SYNC_MEMORY :-/ ), we try to
3485                          * fast-requeue buffers
3486                          */
3487                         if (irq->is_qebsm) {
3488                                 cnt = 1;
3489                                 start_buf = ((qidx+QDIO_MAX_BUFFERS_PER_Q-1) &
3490                                              (QDIO_MAX_BUFFERS_PER_Q-1));
3491                                 qdio_do_eqbs(q, &state, &start_buf, &cnt);
3492                         } else
3493                                 state = q->slsb.acc.val[(qidx+QDIO_MAX_BUFFERS_PER_Q-1)
3494                                         &(QDIO_MAX_BUFFERS_PER_Q-1) ];
3495                          if (state != SLSB_CU_OUTPUT_PRIMED) {
3496                                 qdio_kick_outbound_q(q);
3497                         } else {
3498                                 QDIO_DBF_TEXT3(0,trace, "fast-req");
3499                                 qdio_perf_stat_inc(&perf_stats.fast_reqs);
3500                         }
3501                 }
3502                 /*
3503                  * only marking the q could take too long,
3504                  * the upper layer module could do a lot of
3505                  * traffic in that time
3506                  */
3507                 __qdio_outbound_processing(q);
3508         }
3509
3510         qdio_perf_stat_inc(&perf_stats.outbound_cnt);
3511 }
3512
3513 /* count must be 1 in iqdio */
3514 int
3515 do_QDIO(struct ccw_device *cdev,unsigned int callflags,
3516         unsigned int queue_number, unsigned int qidx,
3517         unsigned int count,struct qdio_buffer *buffers)
3518 {
3519         struct qdio_irq *irq_ptr;
3520 #ifdef CONFIG_QDIO_DEBUG
3521         char dbf_text[20];
3522
3523         sprintf(dbf_text,"doQD%04x",cdev->private->schid.sch_no);
3524         QDIO_DBF_TEXT3(0,trace,dbf_text);
3525 #endif /* CONFIG_QDIO_DEBUG */
3526
3527         if ( (qidx>QDIO_MAX_BUFFERS_PER_Q) ||
3528              (count>QDIO_MAX_BUFFERS_PER_Q) ||
3529              (queue_number>QDIO_MAX_QUEUES_PER_IRQ) )
3530                 return -EINVAL;
3531
3532         if (count==0)
3533                 return 0;
3534
3535         irq_ptr = cdev->private->qdio_data;
3536         if (!irq_ptr)
3537                 return -ENODEV;
3538
3539 #ifdef CONFIG_QDIO_DEBUG
3540         if (callflags&QDIO_FLAG_SYNC_INPUT)
3541                 QDIO_DBF_HEX3(0,trace,&irq_ptr->input_qs[queue_number],
3542                               sizeof(void*));
3543         else
3544                 QDIO_DBF_HEX3(0,trace,&irq_ptr->output_qs[queue_number],
3545                               sizeof(void*));
3546         sprintf(dbf_text,"flag%04x",callflags);
3547         QDIO_DBF_TEXT3(0,trace,dbf_text);
3548         sprintf(dbf_text,"qi%02xct%02x",qidx,count);
3549         QDIO_DBF_TEXT3(0,trace,dbf_text);
3550 #endif /* CONFIG_QDIO_DEBUG */
3551
3552         if (irq_ptr->state!=QDIO_IRQ_STATE_ACTIVE)
3553                 return -EBUSY;
3554
3555         if (callflags&QDIO_FLAG_SYNC_INPUT)
3556                 do_qdio_handle_inbound(irq_ptr->input_qs[queue_number],
3557                                        callflags, qidx, count, buffers);
3558         else if (callflags&QDIO_FLAG_SYNC_OUTPUT)
3559                 do_qdio_handle_outbound(irq_ptr->output_qs[queue_number],
3560                                         callflags, qidx, count, buffers);
3561         else {
3562                 QDIO_DBF_TEXT3(1,trace,"doQD:inv");
3563                 return -EINVAL;
3564         }
3565         return 0;
3566 }
3567
3568 static int
3569 qdio_perf_procfile_read(char *buffer, char **buffer_location, off_t offset,
3570                         int buffer_length, int *eof, void *data)
3571 {
3572         int c=0;
3573
3574         /* we are always called with buffer_length=4k, so we all
3575            deliver on the first read */
3576         if (offset>0)
3577                 return 0;
3578
3579 #define _OUTP_IT(x...) c+=sprintf(buffer+c,x)
3580 #ifdef CONFIG_64BIT
3581         _OUTP_IT("Number of tasklet runs (total)                  : %li\n",
3582                  (long)atomic64_read(&perf_stats.tl_runs));
3583         _OUTP_IT("Inbound tasklet runs      tried/retried         : %li/%li\n",
3584                  (long)atomic64_read(&perf_stats.inbound_tl_runs),
3585                  (long)atomic64_read(&perf_stats.inbound_tl_runs_resched));
3586         _OUTP_IT("Inbound-thin tasklet runs tried/retried         : %li/%li\n",
3587                  (long)atomic64_read(&perf_stats.inbound_thin_tl_runs),
3588                  (long)atomic64_read(&perf_stats.inbound_thin_tl_runs_resched));
3589         _OUTP_IT("Outbound tasklet runs     tried/retried         : %li/%li\n",
3590                  (long)atomic64_read(&perf_stats.outbound_tl_runs),
3591                  (long)atomic64_read(&perf_stats.outbound_tl_runs_resched));
3592         _OUTP_IT("\n");
3593         _OUTP_IT("Number of SIGA sync's issued                    : %li\n",
3594                  (long)atomic64_read(&perf_stats.siga_syncs));
3595         _OUTP_IT("Number of SIGA in's issued                      : %li\n",
3596                  (long)atomic64_read(&perf_stats.siga_ins));
3597         _OUTP_IT("Number of SIGA out's issued                     : %li\n",
3598                  (long)atomic64_read(&perf_stats.siga_outs));
3599         _OUTP_IT("Number of PCIs caught                           : %li\n",
3600                  (long)atomic64_read(&perf_stats.pcis));
3601         _OUTP_IT("Number of adapter interrupts caught             : %li\n",
3602                  (long)atomic64_read(&perf_stats.thinints));
3603         _OUTP_IT("Number of fast requeues (outg. SBALs w/o SIGA)  : %li\n",
3604                  (long)atomic64_read(&perf_stats.fast_reqs));
3605         _OUTP_IT("\n");
3606         _OUTP_IT("Number of inbound transfers                     : %li\n",
3607                  (long)atomic64_read(&perf_stats.inbound_cnt));
3608         _OUTP_IT("Number of do_QDIOs outbound                     : %li\n",
3609                  (long)atomic64_read(&perf_stats.outbound_cnt));
3610 #else /* CONFIG_64BIT */
3611         _OUTP_IT("Number of tasklet runs (total)                  : %i\n",
3612                  atomic_read(&perf_stats.tl_runs));
3613         _OUTP_IT("Inbound tasklet runs      tried/retried         : %i/%i\n",
3614                  atomic_read(&perf_stats.inbound_tl_runs),
3615                  atomic_read(&perf_stats.inbound_tl_runs_resched));
3616         _OUTP_IT("Inbound-thin tasklet runs tried/retried         : %i/%i\n",
3617                  atomic_read(&perf_stats.inbound_thin_tl_runs),
3618                  atomic_read(&perf_stats.inbound_thin_tl_runs_resched));
3619         _OUTP_IT("Outbound tasklet runs     tried/retried         : %i/%i\n",
3620                  atomic_read(&perf_stats.outbound_tl_runs),
3621                  atomic_read(&perf_stats.outbound_tl_runs_resched));
3622         _OUTP_IT("\n");
3623         _OUTP_IT("Number of SIGA sync's issued                    : %i\n",
3624                  atomic_read(&perf_stats.siga_syncs));
3625         _OUTP_IT("Number of SIGA in's issued                      : %i\n",
3626                  atomic_read(&perf_stats.siga_ins));
3627         _OUTP_IT("Number of SIGA out's issued                     : %i\n",
3628                  atomic_read(&perf_stats.siga_outs));
3629         _OUTP_IT("Number of PCIs caught                           : %i\n",
3630                  atomic_read(&perf_stats.pcis));
3631         _OUTP_IT("Number of adapter interrupts caught             : %i\n",
3632                  atomic_read(&perf_stats.thinints));
3633         _OUTP_IT("Number of fast requeues (outg. SBALs w/o SIGA)  : %i\n",
3634                  atomic_read(&perf_stats.fast_reqs));
3635         _OUTP_IT("\n");
3636         _OUTP_IT("Number of inbound transfers                     : %i\n",
3637                  atomic_read(&perf_stats.inbound_cnt));
3638         _OUTP_IT("Number of do_QDIOs outbound                     : %i\n",
3639                  atomic_read(&perf_stats.outbound_cnt));
3640 #endif /* CONFIG_64BIT */
3641         _OUTP_IT("\n");
3642
3643         return c;
3644 }
3645
3646 static struct proc_dir_entry *qdio_perf_proc_file;
3647
3648 static void
3649 qdio_add_procfs_entry(void)
3650 {
3651         proc_perf_file_registration=0;
3652         qdio_perf_proc_file=create_proc_entry(QDIO_PERF,
3653                                               S_IFREG|0444,&proc_root);
3654         if (qdio_perf_proc_file) {
3655                 qdio_perf_proc_file->read_proc=&qdio_perf_procfile_read;
3656         } else proc_perf_file_registration=-1;
3657
3658         if (proc_perf_file_registration)
3659                 QDIO_PRINT_WARN("was not able to register perf. " \
3660                                 "proc-file (%i).\n",
3661                                 proc_perf_file_registration);
3662 }
3663
3664 static void
3665 qdio_remove_procfs_entry(void)
3666 {
3667         if (!proc_perf_file_registration) /* means if it went ok earlier */
3668                 remove_proc_entry(QDIO_PERF,&proc_root);
3669 }
3670
3671 /**
3672  * attributes in sysfs
3673  *****************************************************************************/
3674
3675 static ssize_t
3676 qdio_performance_stats_show(struct bus_type *bus, char *buf)
3677 {
3678         return sprintf(buf, "%i\n", qdio_performance_stats ? 1 : 0);
3679 }
3680
3681 static ssize_t
3682 qdio_performance_stats_store(struct bus_type *bus, const char *buf, size_t count)
3683 {
3684         char *tmp;
3685         int i;
3686
3687         i = simple_strtoul(buf, &tmp, 16);
3688         if ((i == 0) || (i == 1)) {
3689                 if (i == qdio_performance_stats)
3690                         return count;
3691                 qdio_performance_stats = i;
3692                 if (i==0) {
3693                         /* reset perf. stat. info */
3694 #ifdef CONFIG_64BIT
3695                         atomic64_set(&perf_stats.tl_runs, 0);
3696                         atomic64_set(&perf_stats.outbound_tl_runs, 0);
3697                         atomic64_set(&perf_stats.inbound_tl_runs, 0);
3698                         atomic64_set(&perf_stats.inbound_tl_runs_resched, 0);
3699                         atomic64_set(&perf_stats.inbound_thin_tl_runs, 0);
3700                         atomic64_set(&perf_stats.inbound_thin_tl_runs_resched,
3701                                      0);
3702                         atomic64_set(&perf_stats.siga_outs, 0);
3703                         atomic64_set(&perf_stats.siga_ins, 0);
3704                         atomic64_set(&perf_stats.siga_syncs, 0);
3705                         atomic64_set(&perf_stats.pcis, 0);
3706                         atomic64_set(&perf_stats.thinints, 0);
3707                         atomic64_set(&perf_stats.fast_reqs, 0);
3708                         atomic64_set(&perf_stats.outbound_cnt, 0);
3709                         atomic64_set(&perf_stats.inbound_cnt, 0);
3710 #else /* CONFIG_64BIT */
3711                         atomic_set(&perf_stats.tl_runs, 0);
3712                         atomic_set(&perf_stats.outbound_tl_runs, 0);
3713                         atomic_set(&perf_stats.inbound_tl_runs, 0);
3714                         atomic_set(&perf_stats.inbound_tl_runs_resched, 0);
3715                         atomic_set(&perf_stats.inbound_thin_tl_runs, 0);
3716                         atomic_set(&perf_stats.inbound_thin_tl_runs_resched, 0);
3717                         atomic_set(&perf_stats.siga_outs, 0);
3718                         atomic_set(&perf_stats.siga_ins, 0);
3719                         atomic_set(&perf_stats.siga_syncs, 0);
3720                         atomic_set(&perf_stats.pcis, 0);
3721                         atomic_set(&perf_stats.thinints, 0);
3722                         atomic_set(&perf_stats.fast_reqs, 0);
3723                         atomic_set(&perf_stats.outbound_cnt, 0);
3724                         atomic_set(&perf_stats.inbound_cnt, 0);
3725 #endif /* CONFIG_64BIT */
3726                 }
3727         } else {
3728                 QDIO_PRINT_WARN("QDIO performance_stats: write 0 or 1 to this file!\n");
3729                 return -EINVAL;
3730         }
3731         return count;
3732 }
3733
3734 static BUS_ATTR(qdio_performance_stats, 0644, qdio_performance_stats_show,
3735                         qdio_performance_stats_store);
3736
3737 static void
3738 tiqdio_register_thinints(void)
3739 {
3740         char dbf_text[20];
3741         register_thinint_result=
3742                 s390_register_adapter_interrupt(&tiqdio_thinint_handler);
3743         if (register_thinint_result) {
3744                 sprintf(dbf_text,"regthn%x",(register_thinint_result&0xff));
3745                 QDIO_DBF_TEXT0(0,setup,dbf_text);
3746                 QDIO_PRINT_ERR("failed to register adapter handler " \
3747                                "(rc=%i).\nAdapter interrupts might " \
3748                                "not work. Continuing.\n",
3749                                register_thinint_result);
3750         }
3751 }
3752
3753 static void
3754 tiqdio_unregister_thinints(void)
3755 {
3756         if (!register_thinint_result)
3757                 s390_unregister_adapter_interrupt(&tiqdio_thinint_handler);
3758 }
3759
3760 static int
3761 qdio_get_qdio_memory(void)
3762 {
3763         int i;
3764         indicator_used[0]=1;
3765
3766         for (i=1;i<INDICATORS_PER_CACHELINE;i++)
3767                 indicator_used[i]=0;
3768         indicators = kzalloc(sizeof(__u32)*(INDICATORS_PER_CACHELINE),
3769                                    GFP_KERNEL);
3770         if (!indicators)
3771                 return -ENOMEM;
3772         return 0;
3773 }
3774
3775 static void
3776 qdio_release_qdio_memory(void)
3777 {
3778         kfree(indicators);
3779 }
3780
3781
3782 static void
3783 qdio_unregister_dbf_views(void)
3784 {
3785         if (qdio_dbf_setup)
3786                 debug_unregister(qdio_dbf_setup);
3787         if (qdio_dbf_sbal)
3788                 debug_unregister(qdio_dbf_sbal);
3789         if (qdio_dbf_sense)
3790                 debug_unregister(qdio_dbf_sense);
3791         if (qdio_dbf_trace)
3792                 debug_unregister(qdio_dbf_trace);
3793 #ifdef CONFIG_QDIO_DEBUG
3794         if (qdio_dbf_slsb_out)
3795                 debug_unregister(qdio_dbf_slsb_out);
3796         if (qdio_dbf_slsb_in)
3797                 debug_unregister(qdio_dbf_slsb_in);
3798 #endif /* CONFIG_QDIO_DEBUG */
3799 }
3800
3801 static int
3802 qdio_register_dbf_views(void)
3803 {
3804         qdio_dbf_setup=debug_register(QDIO_DBF_SETUP_NAME,
3805                                       QDIO_DBF_SETUP_PAGES,
3806                                       QDIO_DBF_SETUP_NR_AREAS,
3807                                       QDIO_DBF_SETUP_LEN);
3808         if (!qdio_dbf_setup)
3809                 goto oom;
3810         debug_register_view(qdio_dbf_setup,&debug_hex_ascii_view);
3811         debug_set_level(qdio_dbf_setup,QDIO_DBF_SETUP_LEVEL);
3812
3813         qdio_dbf_sbal=debug_register(QDIO_DBF_SBAL_NAME,
3814                                      QDIO_DBF_SBAL_PAGES,
3815                                      QDIO_DBF_SBAL_NR_AREAS,
3816                                      QDIO_DBF_SBAL_LEN);
3817         if (!qdio_dbf_sbal)
3818                 goto oom;
3819
3820         debug_register_view(qdio_dbf_sbal,&debug_hex_ascii_view);
3821         debug_set_level(qdio_dbf_sbal,QDIO_DBF_SBAL_LEVEL);
3822
3823         qdio_dbf_sense=debug_register(QDIO_DBF_SENSE_NAME,
3824                                       QDIO_DBF_SENSE_PAGES,
3825                                       QDIO_DBF_SENSE_NR_AREAS,
3826                                       QDIO_DBF_SENSE_LEN);
3827         if (!qdio_dbf_sense)
3828                 goto oom;
3829
3830         debug_register_view(qdio_dbf_sense,&debug_hex_ascii_view);
3831         debug_set_level(qdio_dbf_sense,QDIO_DBF_SENSE_LEVEL);
3832
3833         qdio_dbf_trace=debug_register(QDIO_DBF_TRACE_NAME,
3834                                       QDIO_DBF_TRACE_PAGES,
3835                                       QDIO_DBF_TRACE_NR_AREAS,
3836                                       QDIO_DBF_TRACE_LEN);
3837         if (!qdio_dbf_trace)
3838                 goto oom;
3839
3840         debug_register_view(qdio_dbf_trace,&debug_hex_ascii_view);
3841         debug_set_level(qdio_dbf_trace,QDIO_DBF_TRACE_LEVEL);
3842
3843 #ifdef CONFIG_QDIO_DEBUG
3844         qdio_dbf_slsb_out=debug_register(QDIO_DBF_SLSB_OUT_NAME,
3845                                          QDIO_DBF_SLSB_OUT_PAGES,
3846                                          QDIO_DBF_SLSB_OUT_NR_AREAS,
3847                                          QDIO_DBF_SLSB_OUT_LEN);
3848         if (!qdio_dbf_slsb_out)
3849                 goto oom;
3850         debug_register_view(qdio_dbf_slsb_out,&debug_hex_ascii_view);
3851         debug_set_level(qdio_dbf_slsb_out,QDIO_DBF_SLSB_OUT_LEVEL);
3852
3853         qdio_dbf_slsb_in=debug_register(QDIO_DBF_SLSB_IN_NAME,
3854                                         QDIO_DBF_SLSB_IN_PAGES,
3855                                         QDIO_DBF_SLSB_IN_NR_AREAS,
3856                                         QDIO_DBF_SLSB_IN_LEN);
3857         if (!qdio_dbf_slsb_in)
3858                 goto oom;
3859         debug_register_view(qdio_dbf_slsb_in,&debug_hex_ascii_view);
3860         debug_set_level(qdio_dbf_slsb_in,QDIO_DBF_SLSB_IN_LEVEL);
3861 #endif /* CONFIG_QDIO_DEBUG */
3862         return 0;
3863 oom:
3864         QDIO_PRINT_ERR("not enough memory for dbf.\n");
3865         qdio_unregister_dbf_views();
3866         return -ENOMEM;
3867 }
3868
3869 static void *qdio_mempool_alloc(gfp_t gfp_mask, void *size)
3870 {
3871         return (void *) get_zeroed_page(gfp_mask|GFP_DMA);
3872 }
3873
3874 static void qdio_mempool_free(void *element, void *size)
3875 {
3876         free_page((unsigned long) element);
3877 }
3878
3879 static int __init
3880 init_QDIO(void)
3881 {
3882         int res;
3883         void *ptr;
3884
3885         printk("qdio: loading %s\n",version);
3886
3887         res=qdio_get_qdio_memory();
3888         if (res)
3889                 return res;
3890
3891         qdio_q_cache = kmem_cache_create("qdio_q", sizeof(struct qdio_q),
3892                                          256, 0, NULL);
3893         if (!qdio_q_cache) {
3894                 qdio_release_qdio_memory();
3895                 return -ENOMEM;
3896         }
3897
3898         res = qdio_register_dbf_views();
3899         if (res) {
3900                 kmem_cache_destroy(qdio_q_cache);
3901                 qdio_release_qdio_memory();
3902                 return res;
3903         }
3904
3905         QDIO_DBF_TEXT0(0,setup,"initQDIO");
3906         res = bus_create_file(&ccw_bus_type, &bus_attr_qdio_performance_stats);
3907
3908         memset((void*)&perf_stats,0,sizeof(perf_stats));
3909         QDIO_DBF_TEXT0(0,setup,"perfstat");
3910         ptr=&perf_stats;
3911         QDIO_DBF_HEX0(0,setup,&ptr,sizeof(void*));
3912
3913         qdio_add_procfs_entry();
3914
3915         qdio_mempool_scssc = mempool_create(QDIO_MEMPOOL_SCSSC_ELEMENTS,
3916                                             qdio_mempool_alloc,
3917                                             qdio_mempool_free, NULL);
3918
3919         if (tiqdio_check_chsc_availability())
3920                 QDIO_PRINT_ERR("Not all CHSCs supported. Continuing.\n");
3921
3922         tiqdio_register_thinints();
3923
3924         return 0;
3925  }
3926
3927 static void __exit
3928 cleanup_QDIO(void)
3929 {
3930         tiqdio_unregister_thinints();
3931         qdio_remove_procfs_entry();
3932         qdio_release_qdio_memory();
3933         qdio_unregister_dbf_views();
3934         mempool_destroy(qdio_mempool_scssc);
3935         kmem_cache_destroy(qdio_q_cache);
3936         bus_remove_file(&ccw_bus_type, &bus_attr_qdio_performance_stats);
3937         printk("qdio: %s: module removed\n",version);
3938 }
3939
3940 module_init(init_QDIO);
3941 module_exit(cleanup_QDIO);
3942
3943 EXPORT_SYMBOL(qdio_allocate);
3944 EXPORT_SYMBOL(qdio_establish);
3945 EXPORT_SYMBOL(qdio_initialize);
3946 EXPORT_SYMBOL(qdio_activate);
3947 EXPORT_SYMBOL(do_QDIO);
3948 EXPORT_SYMBOL(qdio_shutdown);
3949 EXPORT_SYMBOL(qdio_free);
3950 EXPORT_SYMBOL(qdio_cleanup);
3951 EXPORT_SYMBOL(qdio_synchronize);