drivers/s390/cio/qdio.c

   1 /*
   2  *
   3  * linux/drivers/s390/cio/qdio.c
   4  *
   5  * Linux for S/390 QDIO base support, Hipersocket base support
   6  * version 2
   7  *
   8  * Copyright 2000,2002 IBM Corporation
   9  * Author(s):             Utz Bacher <utz.bacher@de.ibm.com>
  10  * 2.6 cio integration by Cornelia Huck <cornelia.huck@de.ibm.com>
  11  *
  12  * Restriction: only 63 iqdio subchannels would have its own indicator,
  13  * after that, subsequent subchannels share one indicator
  14  *
  15  *
  16  *
  17  *
  18  * This program is free software; you can redistribute it and/or modify
  19  * it under the terms of the GNU General Public License as published by
  20  * the Free Software Foundation; either version 2, or (at your option)
  21  * any later version.
  22  *
  23  * This program is distributed in the hope that it will be useful,
  24  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  25  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  26  * GNU General Public License for more details.
  27  *
  28  * You should have received a copy of the GNU General Public License
  29  * along with this program; if not, write to the Free Software
  30  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  31  */
  32
  33 #include <linux/module.h>
  34 #include <linux/init.h>
  35
  36 #include <linux/slab.h>
  37 #include <linux/kernel.h>
  38 #include <linux/proc_fs.h>
  39 #include <linux/timer.h>
  40 #include <linux/mempool.h>
  41
  42 #include <asm/ccwdev.h>
  43 #include <asm/io.h>
  44 #include <asm/atomic.h>
  45 #include <asm/semaphore.h>
  46 #include <asm/timex.h>
  47
  48 #include <asm/debug.h>
  49 #include <asm/s390_rdev.h>
  50 #include <asm/qdio.h>
  51
  52 #include "cio.h"
  53 #include "css.h"
  54 #include "device.h"
  55 #include "airq.h"
  56 #include "qdio.h"
  57 #include "ioasm.h"
  58 #include "chsc.h"
  59
  60 /****************** MODULE PARAMETER VARIABLES ********************/
  61 MODULE_AUTHOR("Utz Bacher <utz.bacher@de.ibm.com>");
  62 MODULE_DESCRIPTION("QDIO base support version 2, " \
  63                    "Copyright 2000 IBM Corporation");
  64 MODULE_LICENSE("GPL");
  65
  66 /******************** HERE WE GO ***********************************/
  67
  68 static const char version[] = "QDIO base support version 2";
  69
  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                  (q->queue_type == QDIO_IQDIO_QFMT_ASYNCH))
 747                 SYNC_MEMORY;
 748
 749 check_next:
 750         if (f==first_not_to_check)
 751                 goto out;
 752
 753         switch(slsb[f_mod_no]) {
 754
 755         /* the adapter has not fetched the output yet */
 756         case SLSB_CU_OUTPUT_PRIMED:
 757                 QDIO_DBF_TEXT5(0,trace,"outpprim");
 758                 break;
 759
 760         /* the adapter got it */
 761         case SLSB_P_OUTPUT_EMPTY:
 762                 atomic_dec(&q->number_of_buffers_used);
 763                 f++;
 764                 f_mod_no=f&(QDIO_MAX_BUFFERS_PER_Q-1);
 765                 QDIO_DBF_TEXT5(0,trace,"outpempt");
 766                 goto check_next;
 767
 768         case SLSB_P_OUTPUT_ERROR:
 769                 QDIO_DBF_TEXT3(0,trace,"outperr");
 770                 sprintf(dbf_text,"%x-%x-%x",f_mod_no,
 771                         q->sbal[f_mod_no]->element[14].sbalf.value,
 772                         q->sbal[f_mod_no]->element[15].sbalf.value);
 773                 QDIO_DBF_TEXT3(1,trace,dbf_text);
 774                 QDIO_DBF_HEX2(1,sbal,q->sbal[f_mod_no],256);
 775
 776                 /* kind of process the buffer */
 777                 set_slsb(q, &f_mod_no, SLSB_P_OUTPUT_NOT_INIT, &count);
 778
 779                 /*
 780                  * we increment the frontier, as this buffer
 781                  * was processed obviously
 782                  */
 783                 atomic_dec(&q->number_of_buffers_used);
 784                 f_mod_no=(f_mod_no+1)&(QDIO_MAX_BUFFERS_PER_Q-1);
 785
 786                 if (q->qdio_error)
 787                         q->error_status_flags|=
 788                                 QDIO_STATUS_MORE_THAN_ONE_QDIO_ERROR;
 789                 q->qdio_error=SLSB_P_OUTPUT_ERROR;
 790                 q->error_status_flags|=QDIO_STATUS_LOOK_FOR_ERROR;
 791
 792                 break;
 793
 794         /* no new buffers */
 795         default:
 796                 QDIO_DBF_TEXT5(0,trace,"outpni");
 797         }
 798 out:
 799         return (q->first_to_check=f_mod_no);
 800 }
 801
 802 /* all buffers are processed */
 803 static int
 804 qdio_is_outbound_q_done(struct qdio_q *q)
 805 {
 806         int no_used;
 807 #ifdef CONFIG_QDIO_DEBUG
 808         char dbf_text[15];
 809 #endif
 810
 811         no_used=atomic_read(&q->number_of_buffers_used);
 812
 813 #ifdef CONFIG_QDIO_DEBUG
 814         if (no_used) {
 815                 sprintf(dbf_text,"oqisnt%02x",no_used);
 816                 QDIO_DBF_TEXT4(0,trace,dbf_text);
 817         } else {
 818                 QDIO_DBF_TEXT4(0,trace,"oqisdone");
 819         }
 820         QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
 821 #endif /* CONFIG_QDIO_DEBUG */
 822         return (no_used==0);
 823 }
 824
 825 static int
 826 qdio_has_outbound_q_moved(struct qdio_q *q)
 827 {
 828         int i;
 829
 830         i=qdio_get_outbound_buffer_frontier(q);
 831
 832         if ( (i!=GET_SAVED_FRONTIER(q)) ||
 833              (q->error_status_flags&QDIO_STATUS_LOOK_FOR_ERROR) ) {
 834                 SAVE_FRONTIER(q,i);
 835                 QDIO_DBF_TEXT4(0,trace,"oqhasmvd");
 836                 QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
 837                 return 1;
 838         } else {
 839                 QDIO_DBF_TEXT4(0,trace,"oqhsntmv");
 840                 QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
 841                 return 0;
 842         }
 843 }
 844
 845 static void
 846 qdio_kick_outbound_q(struct qdio_q *q)
 847 {
 848         int result;
 849 #ifdef CONFIG_QDIO_DEBUG
 850         char dbf_text[15];
 851
 852         QDIO_DBF_TEXT4(0,trace,"kickoutq");
 853         QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
 854 #endif /* CONFIG_QDIO_DEBUG */
 855
 856         if (!q->siga_out)
 857                 return;
 858
 859         /* here's the story with cc=2 and busy bit set (thanks, Rick):
 860          * VM's CP could present us cc=2 and busy bit set on SIGA-write
 861          * during reconfiguration of their Guest LAN (only in HIPERS mode,
 862          * QDIO mode is asynchronous -- cc=2 and busy bit there will take
 863          * the queues down immediately; and not being under VM we have a
 864          * problem on cc=2 and busy bit set right away).
 865          *
 866          * Therefore qdio_siga_output will try for a short time constantly,
 867          * if such a condition occurs. If it doesn't change, it will
 868          * increase the busy_siga_counter and save the timestamp, and
 869          * schedule the queue for later processing (via mark_q, using the
 870          * queue tasklet). __qdio_outbound_processing will check out the
 871          * counter. If non-zero, it will call qdio_kick_outbound_q as often
 872          * as the value of the counter. This will attempt further SIGA
 873          * instructions. For each successful SIGA, the counter is
 874          * decreased, for failing SIGAs the counter remains the same, after
 875          * all.
 876          * After some time of no movement, qdio_kick_outbound_q will
 877          * finally fail and reflect corresponding error codes to call
 878          * the upper layer module and have it take the queues down.
 879          *
 880          * Note that this is a change from the original HiperSockets design
 881          * (saying cc=2 and busy bit means take the queues down), but in
 882          * these days Guest LAN didn't exist... excessive cc=2 with busy bit
 883          * conditions will still take the queues down, but the threshold is
 884          * higher due to the Guest LAN environment.
 885          */
 886
 887
 888         result=qdio_siga_output(q);
 889
 890         switch (result) {
 891         case 0:
 892                 /* went smooth this time, reset timestamp */
 893 #ifdef CONFIG_QDIO_DEBUG
 894                 QDIO_DBF_TEXT3(0,trace,"cc2reslv");
 895                 sprintf(dbf_text,"%4x%2x%2x",q->schid.sch_no,q->q_no,
 896                         atomic_read(&q->busy_siga_counter));
 897                 QDIO_DBF_TEXT3(0,trace,dbf_text);
 898 #endif /* CONFIG_QDIO_DEBUG */
 899                 q->timing.busy_start=0;
 900                 break;
 901         case (2|QDIO_SIGA_ERROR_B_BIT_SET):
 902                 /* cc=2 and busy bit: */
 903                 atomic_inc(&q->busy_siga_counter);
 904
 905                 /* if the last siga was successful, save
 906                  * timestamp here */
 907                 if (!q->timing.busy_start)
 908                         q->timing.busy_start=NOW;
 909
 910                 /* if we're in time, don't touch error_status_flags
 911                  * and siga_error */
 912                 if (NOW-q->timing.busy_start<QDIO_BUSY_BIT_GIVE_UP) {
 913                         qdio_mark_q(q);
 914                         break;
 915                 }
 916                 QDIO_DBF_TEXT2(0,trace,"cc2REPRT");
 917 #ifdef CONFIG_QDIO_DEBUG
 918                 sprintf(dbf_text,"%4x%2x%2x",q->schid.sch_no,q->q_no,
 919                         atomic_read(&q->busy_siga_counter));
 920                 QDIO_DBF_TEXT3(0,trace,dbf_text);
 921 #endif /* CONFIG_QDIO_DEBUG */
 922                 /* else fallthrough and report error */
 923         default:
 924                 /* for plain cc=1, 2 or 3: */
 925                 if (q->siga_error)
 926                         q->error_status_flags|=
 927                                 QDIO_STATUS_MORE_THAN_ONE_SIGA_ERROR;
 928                 q->error_status_flags|=
 929                         QDIO_STATUS_LOOK_FOR_ERROR;
 930                 q->siga_error=result;
 931         }
 932 }
 933
 934 static void
 935 qdio_kick_outbound_handler(struct qdio_q *q)
 936 {
 937         int start, end, real_end, count;
 938 #ifdef CONFIG_QDIO_DEBUG
 939         char dbf_text[15];
 940 #endif
 941
 942         start = q->first_element_to_kick;
 943         /* last_move_ftc was just updated */
 944         real_end = GET_SAVED_FRONTIER(q);
 945         end = (real_end+QDIO_MAX_BUFFERS_PER_Q-1)&
 946                 (QDIO_MAX_BUFFERS_PER_Q-1);
 947         count = (end+QDIO_MAX_BUFFERS_PER_Q+1-start)&
 948                 (QDIO_MAX_BUFFERS_PER_Q-1);
 949
 950 #ifdef CONFIG_QDIO_DEBUG
 951         QDIO_DBF_TEXT4(0,trace,"kickouth");
 952         QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
 953
 954         sprintf(dbf_text,"s=%2xc=%2x",start,count);
 955         QDIO_DBF_TEXT4(0,trace,dbf_text);
 956 #endif /* CONFIG_QDIO_DEBUG */
 957
 958         if (q->state==QDIO_IRQ_STATE_ACTIVE)
 959                 q->handler(q->cdev,QDIO_STATUS_OUTBOUND_INT|
 960                            q->error_status_flags,
 961                            q->qdio_error,q->siga_error,q->q_no,start,count,
 962                            q->int_parm);
 963
 964         /* for the next time: */
 965         q->first_element_to_kick=real_end;
 966         q->qdio_error=0;
 967         q->siga_error=0;
 968         q->error_status_flags=0;
 969 }
 970
 971 static void
 972 __qdio_outbound_processing(struct qdio_q *q)
 973 {
 974         int siga_attempts;
 975
 976         QDIO_DBF_TEXT4(0,trace,"qoutproc");
 977         QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
 978
 979         if (unlikely(qdio_reserve_q(q))) {
 980                 qdio_release_q(q);
 981                 qdio_perf_stat_inc(&perf_stats.outbound_tl_runs_resched);
 982                 /* as we're sissies, we'll check next time */
 983                 if (likely(!atomic_read(&q->is_in_shutdown))) {
 984                         qdio_mark_q(q);
 985                         QDIO_DBF_TEXT4(0,trace,"busy,agn");
 986                 }
 987                 return;
 988         }
 989         qdio_perf_stat_inc(&perf_stats.outbound_tl_runs);
 990         qdio_perf_stat_inc(&perf_stats.tl_runs);
 991
 992         /* see comment in qdio_kick_outbound_q */
 993         siga_attempts=atomic_read(&q->busy_siga_counter);
 994         while (siga_attempts) {
 995                 atomic_dec(&q->busy_siga_counter);
 996                 qdio_kick_outbound_q(q);
 997                 siga_attempts--;
 998         }
 999
1000         if (qdio_has_outbound_q_moved(q))
1001                 qdio_kick_outbound_handler(q);
1002
1003         if (q->queue_type == QDIO_ZFCP_QFMT) {
1004                 if ((!q->hydra_gives_outbound_pcis) &&
1005                     (!qdio_is_outbound_q_done(q)))
1006                         qdio_mark_q(q);
1007         }
1008         else if (((!q->is_iqdio_q) && (!q->is_pci_out)) ||
1009                  (q->queue_type == QDIO_IQDIO_QFMT_ASYNCH)) {
1010                 /*
1011                  * make sure buffer switch from PRIMED to EMPTY is noticed
1012                  * and outbound_handler is called
1013                  */
1014                 if (qdio_is_outbound_q_done(q)) {
1015                         del_timer(&q->timer);
1016                 } else {
1017                         if (!timer_pending(&q->timer))
1018                                 mod_timer(&q->timer, jiffies +
1019                                           QDIO_FORCE_CHECK_TIMEOUT);
1020                 }
1021         }
1022
1023         qdio_release_q(q);
1024 }
1025
1026 static void
1027 qdio_outbound_processing(struct qdio_q *q)
1028 {
1029         __qdio_outbound_processing(q);
1030 }
1031
1032 /************************* INBOUND ROUTINES *******************************/
1033
1034
1035 static int
1036 qdio_get_inbound_buffer_frontier(struct qdio_q *q)
1037 {
1038         struct qdio_irq *irq;
1039         int f,f_mod_no;
1040         volatile char *slsb;
1041         unsigned int count = 1;
1042         int first_not_to_check;
1043 #ifdef CONFIG_QDIO_DEBUG
1044         char dbf_text[15];
1045 #endif /* CONFIG_QDIO_DEBUG */
1046 #ifdef QDIO_USE_PROCESSING_STATE
1047         int last_position=-1;
1048 #endif /* QDIO_USE_PROCESSING_STATE */
1049
1050         QDIO_DBF_TEXT4(0,trace,"getibfro");
1051         QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
1052
1053         irq = (struct qdio_irq *) q->irq_ptr;
1054         if (irq->is_qebsm)
1055                 return qdio_qebsm_get_inbound_buffer_frontier(q);
1056
1057         slsb=&q->slsb.acc.val[0];
1058         f_mod_no=f=q->first_to_check;
1059         /*
1060          * we don't check 128 buffers, as otherwise qdio_has_inbound_q_moved
1061          * would return 0
1062          */
1063         first_not_to_check=f+qdio_min(atomic_read(&q->number_of_buffers_used),
1064                                       (QDIO_MAX_BUFFERS_PER_Q-1));
1065
1066         /*
1067          * we don't use this one, as a PCI or we after a thin interrupt
1068          * will sync the queues
1069          */
1070         /* SYNC_MEMORY;*/
1071
1072 check_next:
1073         f_mod_no=f&(QDIO_MAX_BUFFERS_PER_Q-1);
1074         if (f==first_not_to_check)
1075                 goto out;
1076         switch (slsb[f_mod_no]) {
1077
1078         /* CU_EMPTY means frontier is reached */
1079         case SLSB_CU_INPUT_EMPTY:
1080                 QDIO_DBF_TEXT5(0,trace,"inptempt");
1081                 break;
1082
1083         /* P_PRIMED means set slsb to P_PROCESSING and move on */
1084         case SLSB_P_INPUT_PRIMED:
1085                 QDIO_DBF_TEXT5(0,trace,"inptprim");
1086
1087 #ifdef QDIO_USE_PROCESSING_STATE
1088                 /*
1089                  * as soon as running under VM, polling the input queues will
1090                  * kill VM in terms of CP overhead
1091                  */
1092                 if (q->siga_sync) {
1093                         set_slsb(q, &f_mod_no, SLSB_P_INPUT_NOT_INIT, &count);
1094                 } else {
1095                         /* set the previous buffer to NOT_INIT. The current
1096                          * buffer will be set to PROCESSING at the end of
1097                          * this function to avoid further interrupts. */
1098                         if (last_position>=0)
1099                                 set_slsb(q, &last_position,
1100                                          SLSB_P_INPUT_NOT_INIT, &count);
1101                         atomic_set(&q->polling,1);
1102                         last_position=f_mod_no;
1103                 }
1104 #else /* QDIO_USE_PROCESSING_STATE */
1105                 set_slsb(q, &f_mod_no, SLSB_P_INPUT_NOT_INIT, &count);
1106 #endif /* QDIO_USE_PROCESSING_STATE */
1107                 /*
1108                  * not needed, as the inbound queue will be synced on the next
1109                  * siga-r, resp. tiqdio_is_inbound_q_done will do the siga-s
1110                  */
1111                 /*SYNC_MEMORY;*/
1112                 f++;
1113                 atomic_dec(&q->number_of_buffers_used);
1114                 goto check_next;
1115
1116         case SLSB_P_INPUT_NOT_INIT:
1117         case SLSB_P_INPUT_PROCESSING:
1118                 QDIO_DBF_TEXT5(0,trace,"inpnipro");
1119                 break;
1120
1121         /* P_ERROR means frontier is reached, break and report error */
1122         case SLSB_P_INPUT_ERROR:
1123 #ifdef CONFIG_QDIO_DEBUG
1124                 sprintf(dbf_text,"inperr%2x",f_mod_no);
1125                 QDIO_DBF_TEXT3(1,trace,dbf_text);
1126 #endif /* CONFIG_QDIO_DEBUG */
1127                 QDIO_DBF_HEX2(1,sbal,q->sbal[f_mod_no],256);
1128
1129                 /* kind of process the buffer */
1130                 set_slsb(q, &f_mod_no, SLSB_P_INPUT_NOT_INIT, &count);
1131
1132                 if (q->qdio_error)
1133                         q->error_status_flags|=
1134                                 QDIO_STATUS_MORE_THAN_ONE_QDIO_ERROR;
1135                 q->qdio_error=SLSB_P_INPUT_ERROR;
1136                 q->error_status_flags|=QDIO_STATUS_LOOK_FOR_ERROR;
1137
1138                 /* we increment the frontier, as this buffer
1139                  * was processed obviously */
1140                 f_mod_no=(f_mod_no+1)&(QDIO_MAX_BUFFERS_PER_Q-1);
1141                 atomic_dec(&q->number_of_buffers_used);
1142
1143 #ifdef QDIO_USE_PROCESSING_STATE
1144                 last_position=-1;
1145 #endif /* QDIO_USE_PROCESSING_STATE */
1146
1147                 break;
1148
1149         /* everything else means frontier not changed (HALTED or so) */
1150         default:
1151                 break;
1152         }
1153 out:
1154         q->first_to_check=f_mod_no;
1155
1156 #ifdef QDIO_USE_PROCESSING_STATE
1157         if (last_position>=0)
1158                 set_slsb(q, &last_position, SLSB_P_INPUT_PROCESSING, &count);
1159 #endif /* QDIO_USE_PROCESSING_STATE */
1160
1161         QDIO_DBF_HEX4(0,trace,&q->first_to_check,sizeof(int));
1162
1163         return q->first_to_check;
1164 }
1165
1166 static int
1167 qdio_has_inbound_q_moved(struct qdio_q *q)
1168 {
1169         int i;
1170
1171         i=qdio_get_inbound_buffer_frontier(q);
1172         if ( (i!=GET_SAVED_FRONTIER(q)) ||
1173              (q->error_status_flags&QDIO_STATUS_LOOK_FOR_ERROR) ) {
1174                 SAVE_FRONTIER(q,i);
1175                 if ((!q->siga_sync)&&(!q->hydra_gives_outbound_pcis))
1176                         SAVE_TIMESTAMP(q);
1177
1178                 QDIO_DBF_TEXT4(0,trace,"inhasmvd");
1179                 QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
1180                 return 1;
1181         } else {
1182                 QDIO_DBF_TEXT4(0,trace,"inhsntmv");
1183                 QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
1184                 return 0;
1185         }
1186 }
1187
1188 /* means, no more buffers to be filled */
1189 static int
1190 tiqdio_is_inbound_q_done(struct qdio_q *q)
1191 {
1192         int no_used;
1193         unsigned int start_buf, count;
1194         unsigned char state = 0;
1195         struct qdio_irq *irq = (struct qdio_irq *) q->irq_ptr;
1196
1197 #ifdef CONFIG_QDIO_DEBUG
1198         char dbf_text[15];
1199 #endif
1200
1201         no_used=atomic_read(&q->number_of_buffers_used);
1202
1203         /* propagate the change from 82 to 80 through VM */
1204         SYNC_MEMORY;
1205
1206 #ifdef CONFIG_QDIO_DEBUG
1207         if (no_used) {
1208                 sprintf(dbf_text,"iqisnt%02x",no_used);
1209                 QDIO_DBF_TEXT4(0,trace,dbf_text);
1210         } else {
1211                 QDIO_DBF_TEXT4(0,trace,"iniqisdo");
1212         }
1213         QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
1214 #endif /* CONFIG_QDIO_DEBUG */
1215
1216         if (!no_used)
1217                 return 1;
1218         if (!q->siga_sync && !irq->is_qebsm)
1219                 /* we'll check for more primed buffers in qeth_stop_polling */
1220                 return 0;
1221         if (irq->is_qebsm) {
1222                 count = 1;
1223                 start_buf = q->first_to_check;
1224                 qdio_do_eqbs(q, &state, &start_buf, &count);
1225         } else
1226                 state = q->slsb.acc.val[q->first_to_check];
1227         if (state != SLSB_P_INPUT_PRIMED)
1228                 /*
1229                  * nothing more to do, if next buffer is not PRIMED.
1230                  * note that we did a SYNC_MEMORY before, that there
1231                  * has been a sychnronization.
1232                  * we will return 0 below, as there is nothing to do
1233                  * (stop_polling not necessary, as we have not been
1234                  * using the PROCESSING state
1235                  */
1236                 return 0;
1237
1238         /*
1239          * ok, the next input buffer is primed. that means, that device state
1240          * change indicator and adapter local summary are set, so we will find
1241          * it next time.
1242          * we will return 0 below, as there is nothing to do, except scheduling
1243          * ourselves for the next time.
1244          */
1245         tiqdio_set_summary_bit((__u32*)q->dev_st_chg_ind);
1246         tiqdio_sched_tl();
1247         return 0;
1248 }
1249
1250 static int
1251 qdio_is_inbound_q_done(struct qdio_q *q)
1252 {
1253         int no_used;
1254         unsigned int start_buf, count;
1255         unsigned char state = 0;
1256         struct qdio_irq *irq = (struct qdio_irq *) q->irq_ptr;
1257
1258 #ifdef CONFIG_QDIO_DEBUG
1259         char dbf_text[15];
1260 #endif
1261
1262         no_used=atomic_read(&q->number_of_buffers_used);
1263
1264         /*
1265          * we need that one for synchronization with the adapter, as it
1266          * does a kind of PCI avoidance
1267          */
1268         SYNC_MEMORY;
1269
1270         if (!no_used) {
1271                 QDIO_DBF_TEXT4(0,trace,"inqisdnA");
1272                 QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
1273                 return 1;
1274         }
1275         if (irq->is_qebsm) {
1276                 count = 1;
1277                 start_buf = q->first_to_check;
1278                 qdio_do_eqbs(q, &state, &start_buf, &count);
1279         } else
1280                 state = q->slsb.acc.val[q->first_to_check];
1281         if (state == SLSB_P_INPUT_PRIMED) {
1282                 /* we got something to do */
1283                 QDIO_DBF_TEXT4(0,trace,"inqisntA");
1284                 QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
1285                 return 0;
1286         }
1287
1288         /* on VM, we don't poll, so the q is always done here */
1289         if (q->siga_sync)
1290                 return 1;
1291         if (q->hydra_gives_outbound_pcis)
1292                 return 1;
1293
1294         /*
1295          * at this point we know, that inbound first_to_check
1296          * has (probably) not moved (see qdio_inbound_processing)
1297          */
1298         if (NOW>GET_SAVED_TIMESTAMP(q)+q->timing.threshold) {
1299 #ifdef CONFIG_QDIO_DEBUG
1300                 QDIO_DBF_TEXT4(0,trace,"inqisdon");
1301                 QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
1302                 sprintf(dbf_text,"pf%02xcn%02x",q->first_to_check,no_used);
1303                 QDIO_DBF_TEXT4(0,trace,dbf_text);
1304 #endif /* CONFIG_QDIO_DEBUG */
1305                 return 1;
1306         } else {
1307 #ifdef CONFIG_QDIO_DEBUG
1308                 QDIO_DBF_TEXT4(0,trace,"inqisntd");
1309                 QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
1310                 sprintf(dbf_text,"pf%02xcn%02x",q->first_to_check,no_used);
1311                 QDIO_DBF_TEXT4(0,trace,dbf_text);
1312 #endif /* CONFIG_QDIO_DEBUG */
1313                 return 0;
1314         }
1315 }
1316
1317 static void
1318 qdio_kick_inbound_handler(struct qdio_q *q)
1319 {
1320         int count, start, end, real_end, i;
1321 #ifdef CONFIG_QDIO_DEBUG
1322         char dbf_text[15];
1323 #endif
1324
1325         QDIO_DBF_TEXT4(0,trace,"kickinh");
1326         QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
1327
1328         start=q->first_element_to_kick;
1329         real_end=q->first_to_check;
1330         end=(real_end+QDIO_MAX_BUFFERS_PER_Q-1)&(QDIO_MAX_BUFFERS_PER_Q-1);
1331
1332         i=start;
1333         count=0;
1334         while (1) {
1335                 count++;
1336                 if (i==end)
1337                         break;
1338                 i=(i+1)&(QDIO_MAX_BUFFERS_PER_Q-1);
1339         }
1340
1341 #ifdef CONFIG_QDIO_DEBUG
1342         sprintf(dbf_text,"s=%2xc=%2x",start,count);
1343         QDIO_DBF_TEXT4(0,trace,dbf_text);
1344 #endif /* CONFIG_QDIO_DEBUG */
1345
1346         if (likely(q->state==QDIO_IRQ_STATE_ACTIVE))
1347                 q->handler(q->cdev,
1348                            QDIO_STATUS_INBOUND_INT|q->error_status_flags,
1349                            q->qdio_error,q->siga_error,q->q_no,start,count,
1350                            q->int_parm);
1351
1352         /* for the next time: */
1353         q->first_element_to_kick=real_end;
1354         q->qdio_error=0;
1355         q->siga_error=0;
1356         q->error_status_flags=0;
1357
1358         qdio_perf_stat_inc(&perf_stats.inbound_cnt);
1359 }
1360
1361 static void
1362 __tiqdio_inbound_processing(struct qdio_q *q, int spare_ind_was_set)
1363 {
1364         struct qdio_irq *irq_ptr;
1365         struct qdio_q *oq;
1366         int i;
1367
1368         QDIO_DBF_TEXT4(0,trace,"iqinproc");
1369         QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
1370
1371         /*
1372          * we first want to reserve the q, so that we know, that we don't
1373          * interrupt ourselves and call qdio_unmark_q, as is_in_shutdown might
1374          * be set
1375          */
1376         if (unlikely(qdio_reserve_q(q))) {
1377                 qdio_release_q(q);
1378                 qdio_perf_stat_inc(&perf_stats.inbound_thin_tl_runs_resched);
1379                 /*
1380                  * as we might just be about to stop polling, we make
1381                  * sure that we check again at least once more
1382                  */
1383                 tiqdio_sched_tl();
1384                 return;
1385         }
1386         qdio_perf_stat_inc(&perf_stats.inbound_thin_tl_runs);
1387         if (unlikely(atomic_read(&q->is_in_shutdown))) {
1388                 qdio_unmark_q(q);
1389                 goto out;
1390         }
1391
1392         /*
1393          * we reset spare_ind_was_set, when the queue does not use the
1394          * spare indicator
1395          */
1396         if (spare_ind_was_set)
1397                 spare_ind_was_set = (q->dev_st_chg_ind == &spare_indicator);
1398
1399         if (!(*(q->dev_st_chg_ind)) && !spare_ind_was_set)
1400                 goto out;
1401         /*
1402          * q->dev_st_chg_ind is the indicator, be it shared or not.
1403          * only clear it, if indicator is non-shared
1404          */
1405         if (!spare_ind_was_set)
1406                 tiqdio_clear_summary_bit((__u32*)q->dev_st_chg_ind);
1407
1408         if (q->hydra_gives_outbound_pcis) {
1409                 if (!q->siga_sync_done_on_thinints) {
1410                         SYNC_MEMORY_ALL;
1411                 } else if ((!q->siga_sync_done_on_outb_tis)&&
1412                          (q->hydra_gives_outbound_pcis)) {
1413                         SYNC_MEMORY_ALL_OUTB;
1414                 }
1415         } else {
1416                 SYNC_MEMORY;
1417         }
1418         /*
1419          * maybe we have to do work on our outbound queues... at least
1420          * we have to check the outbound-int-capable thinint-capable
1421          * queues
1422          */
1423         if (q->hydra_gives_outbound_pcis) {
1424                 irq_ptr = (struct qdio_irq*)q->irq_ptr;
1425                 for (i=0;i<irq_ptr->no_output_qs;i++) {
1426                         oq = irq_ptr->output_qs[i];
1427                         if (!qdio_is_outbound_q_done(oq)) {
1428                                 qdio_perf_stat_dec(&perf_stats.tl_runs);
1429                                 __qdio_outbound_processing(oq);
1430                         }
1431                 }
1432         }
1433
1434         if (!qdio_has_inbound_q_moved(q))
1435                 goto out;
1436
1437         qdio_kick_inbound_handler(q);
1438         if (tiqdio_is_inbound_q_done(q))
1439                 if (!qdio_stop_polling(q)) {
1440                         /*
1441                          * we set the flags to get into the stuff next time,
1442                          * see also comment in qdio_stop_polling
1443                          */
1444                         tiqdio_set_summary_bit((__u32*)q->dev_st_chg_ind);
1445                         tiqdio_sched_tl();
1446                 }
1447 out:
1448         qdio_release_q(q);
1449 }
1450
1451 static void
1452 tiqdio_inbound_processing(struct qdio_q *q)
1453 {
1454         __tiqdio_inbound_processing(q, atomic_read(&spare_indicator_usecount));
1455 }
1456
1457 static void
1458 __qdio_inbound_processing(struct qdio_q *q)
1459 {
1460         int q_laps=0;
1461
1462         QDIO_DBF_TEXT4(0,trace,"qinproc");
1463         QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
1464
1465         if (unlikely(qdio_reserve_q(q))) {
1466                 qdio_release_q(q);
1467                 qdio_perf_stat_inc(&perf_stats.inbound_tl_runs_resched);
1468                 /* as we're sissies, we'll check next time */
1469                 if (likely(!atomic_read(&q->is_in_shutdown))) {
1470                         qdio_mark_q(q);
1471                         QDIO_DBF_TEXT4(0,trace,"busy,agn");
1472                 }
1473                 return;
1474         }
1475         qdio_perf_stat_inc(&perf_stats.inbound_tl_runs);
1476         qdio_perf_stat_inc(&perf_stats.tl_runs);
1477
1478 again:
1479         if (qdio_has_inbound_q_moved(q)) {
1480                 qdio_kick_inbound_handler(q);
1481                 if (!qdio_stop_polling(q)) {
1482                         q_laps++;
1483                         if (q_laps<QDIO_Q_LAPS)
1484                                 goto again;
1485                 }
1486                 qdio_mark_q(q);
1487         } else {
1488                 if (!qdio_is_inbound_q_done(q))
1489                         /* means poll time is not yet over */
1490                         qdio_mark_q(q);
1491         }
1492
1493         qdio_release_q(q);
1494 }
1495
1496 static void
1497 qdio_inbound_processing(struct qdio_q *q)
1498 {
1499         __qdio_inbound_processing(q);
1500 }
1501
1502 /************************* MAIN ROUTINES *******************************/
1503
1504 #ifdef QDIO_USE_PROCESSING_STATE
1505 static int
1506 tiqdio_reset_processing_state(struct qdio_q *q, int q_laps)
1507 {
1508         if (!q) {
1509                 tiqdio_sched_tl();
1510                 return 0;
1511         }
1512
1513         /*
1514          * under VM, we have not used the PROCESSING state, so no
1515          * need to stop polling
1516          */
1517         if (q->siga_sync)
1518                 return 2;
1519
1520         if (unlikely(qdio_reserve_q(q))) {
1521                 qdio_release_q(q);
1522                 qdio_perf_stat_inc(&perf_stats.inbound_thin_tl_runs_resched);
1523                 /*
1524                  * as we might just be about to stop polling, we make
1525                  * sure that we check again at least once more
1526                  */
1527
1528                 /*
1529                  * sanity -- we'd get here without setting the
1530                  * dev st chg ind
1531                  */
1532                 tiqdio_set_summary_bit((__u32*)q->dev_st_chg_ind);
1533                 tiqdio_sched_tl();
1534                 return 0;
1535         }
1536         if (qdio_stop_polling(q)) {
1537                 qdio_release_q(q);
1538                 return 2;
1539         }
1540         if (q_laps<QDIO_Q_LAPS-1) {
1541                 qdio_release_q(q);
1542                 return 3;
1543         }
1544         /*
1545          * we set the flags to get into the stuff
1546          * next time, see also comment in qdio_stop_polling
1547          */
1548         tiqdio_set_summary_bit((__u32*)q->dev_st_chg_ind);
1549         tiqdio_sched_tl();
1550         qdio_release_q(q);
1551         return 1;
1552
1553 }
1554 #endif /* QDIO_USE_PROCESSING_STATE */
1555
1556 static void
1557 tiqdio_inbound_checks(void)
1558 {
1559         struct qdio_q *q;
1560         int spare_ind_was_set=0;
1561 #ifdef QDIO_USE_PROCESSING_STATE
1562         int q_laps=0;
1563 #endif /* QDIO_USE_PROCESSING_STATE */
1564
1565         QDIO_DBF_TEXT4(0,trace,"iqdinbck");
1566         QDIO_DBF_TEXT5(0,trace,"iqlocsum");
1567
1568 #ifdef QDIO_USE_PROCESSING_STATE
1569 again:
1570 #endif /* QDIO_USE_PROCESSING_STATE */
1571
1572         /* when the spare indicator is used and set, save that and clear it */
1573         if ((atomic_read(&spare_indicator_usecount)) && spare_indicator) {
1574                 spare_ind_was_set = 1;
1575                 tiqdio_clear_summary_bit((__u32*)&spare_indicator);
1576         }
1577
1578         q=(struct qdio_q*)tiq_list;
1579         do {
1580                 if (!q)
1581                         break;
1582                 __tiqdio_inbound_processing(q, spare_ind_was_set);
1583                 q=(struct qdio_q*)q->list_next;
1584         } while (q!=(struct qdio_q*)tiq_list);
1585
1586 #ifdef QDIO_USE_PROCESSING_STATE
1587         q=(struct qdio_q*)tiq_list;
1588         do {
1589                 int ret;
1590
1591                 ret = tiqdio_reset_processing_state(q, q_laps);
1592                 switch (ret) {
1593                 case 0:
1594                         return;
1595                 case 1:
1596                         q_laps++;
1597                 case 2:
1598                         q = (struct qdio_q*)q->list_next;
1599                         break;
1600                 default:
1601                         q_laps++;
1602                         goto again;
1603                 }
1604         } while (q!=(struct qdio_q*)tiq_list);
1605 #endif /* QDIO_USE_PROCESSING_STATE */
1606 }
1607
1608 static void
1609 tiqdio_tl(unsigned long data)
1610 {
1611         QDIO_DBF_TEXT4(0,trace,"iqdio_tl");
1612
1613         qdio_perf_stat_inc(&perf_stats.tl_runs);
1614
1615         tiqdio_inbound_checks();
1616 }
1617
1618 /********************* GENERAL HELPER_ROUTINES ***********************/
1619
1620 static void
1621 qdio_release_irq_memory(struct qdio_irq *irq_ptr)
1622 {
1623         int i;
1624         struct qdio_q *q;
1625
1626         for (i = 0; i < QDIO_MAX_QUEUES_PER_IRQ; i++) {
1627                 q = irq_ptr->input_qs[i];
1628                 if (q) {
1629                         free_page((unsigned long) q->slib);
1630                         kmem_cache_free(qdio_q_cache, q);
1631                 }
1632                 q = irq_ptr->output_qs[i];
1633                 if (q) {
1634                         free_page((unsigned long) q->slib);
1635                         kmem_cache_free(qdio_q_cache, q);
1636                 }
1637         }
1638         free_page((unsigned long) irq_ptr->qdr);
1639         free_page((unsigned long) irq_ptr);
1640 }
1641
1642 static void
1643 qdio_set_impl_params(struct qdio_irq *irq_ptr,
1644                      unsigned int qib_param_field_format,
1645                      /* pointer to 128 bytes or NULL, if no param field */
1646                      unsigned char *qib_param_field,
1647                      /* pointer to no_queues*128 words of data or NULL */
1648                      unsigned int no_input_qs,
1649                      unsigned int no_output_qs,
1650                      unsigned long *input_slib_elements,
1651                      unsigned long *output_slib_elements)
1652 {
1653         int i,j;
1654
1655         if (!irq_ptr)
1656                 return;
1657
1658         irq_ptr->qib.pfmt=qib_param_field_format;
1659         if (qib_param_field)
1660                 memcpy(irq_ptr->qib.parm,qib_param_field,
1661                        QDIO_MAX_BUFFERS_PER_Q);
1662
1663         if (input_slib_elements)
1664                 for (i=0;i<no_input_qs;i++) {
1665                         for (j=0;j<QDIO_MAX_BUFFERS_PER_Q;j++)
1666                                 irq_ptr->input_qs[i]->slib->slibe[j].parms=
1667                                         input_slib_elements[
1668                                                 i*QDIO_MAX_BUFFERS_PER_Q+j];
1669                 }
1670         if (output_slib_elements)
1671                 for (i=0;i<no_output_qs;i++) {
1672                         for (j=0;j<QDIO_MAX_BUFFERS_PER_Q;j++)
1673                                 irq_ptr->output_qs[i]->slib->slibe[j].parms=
1674                                         output_slib_elements[
1675                                                 i*QDIO_MAX_BUFFERS_PER_Q+j];
1676                 }
1677 }
1678
1679 static int
1680 qdio_alloc_qs(struct qdio_irq *irq_ptr,
1681               int no_input_qs, int no_output_qs)
1682 {
1683         int i;
1684         struct qdio_q *q;
1685
1686         for (i = 0; i < no_input_qs; i++) {
1687                 q = kmem_cache_alloc(qdio_q_cache, GFP_KERNEL);
1688                 if (!q)
1689                         return -ENOMEM;
1690                 memset(q, 0, sizeof(*q));
1691
1692                 q->slib = (struct slib *) __get_free_page(GFP_KERNEL);
1693                 if (!q->slib) {
1694                         kmem_cache_free(qdio_q_cache, q);
1695                         return -ENOMEM;
1696                 }
1697                 irq_ptr->input_qs[i]=q;
1698         }
1699
1700         for (i = 0; i < no_output_qs; i++) {
1701                 q = kmem_cache_alloc(qdio_q_cache, GFP_KERNEL);
1702                 if (!q)
1703                         return -ENOMEM;
1704                 memset(q, 0, sizeof(*q));
1705
1706                 q->slib = (struct slib *) __get_free_page(GFP_KERNEL);
1707                 if (!q->slib) {
1708                         kmem_cache_free(qdio_q_cache, q);
1709                         return -ENOMEM;
1710                 }
1711                 irq_ptr->output_qs[i]=q;
1712         }
1713         return 0;
1714 }
1715
1716 static void
1717 qdio_fill_qs(struct qdio_irq *irq_ptr, struct ccw_device *cdev,
1718              int no_input_qs, int no_output_qs,
1719              qdio_handler_t *input_handler,
1720              qdio_handler_t *output_handler,
1721              unsigned long int_parm,int q_format,
1722              unsigned long flags,
1723              void **inbound_sbals_array,
1724              void **outbound_sbals_array)
1725 {
1726         struct qdio_q *q;
1727         int i,j;
1728         char dbf_text[20]; /* see qdio_initialize */
1729         void *ptr;
1730         int available;
1731
1732         sprintf(dbf_text,"qfqs%4x",cdev->private->schid.sch_no);
1733         QDIO_DBF_TEXT0(0,setup,dbf_text);
1734         for (i=0;i<no_input_qs;i++) {
1735                 q=irq_ptr->input_qs[i];
1736
1737                 memset(q,0,((char*)&q->slib)-((char*)q));
1738                 sprintf(dbf_text,"in-q%4x",i);
1739                 QDIO_DBF_TEXT0(0,setup,dbf_text);
1740                 QDIO_DBF_HEX0(0,setup,&q,sizeof(void*));
1741
1742                 memset(q->slib,0,PAGE_SIZE);
1743                 q->sl=(struct sl*)(((char*)q->slib)+PAGE_SIZE/2);
1744
1745                 available=0;
1746
1747                 for (j=0;j<QDIO_MAX_BUFFERS_PER_Q;j++)
1748                         q->sbal[j]=*(inbound_sbals_array++);
1749
1750                 q->queue_type=q_format;
1751                 q->int_parm=int_parm;
1752                 q->schid = irq_ptr->schid;
1753                 q->irq_ptr = irq_ptr;
1754                 q->cdev = cdev;
1755                 q->mask=1<<(31-i);
1756                 q->q_no=i;
1757                 q->is_input_q=1;
1758                 q->first_to_check=0;
1759                 q->last_move_ftc=0;
1760                 q->handler=input_handler;
1761                 q->dev_st_chg_ind=irq_ptr->dev_st_chg_ind;
1762
1763                 q->tasklet.data=(unsigned long)q;
1764                 /* q->is_thinint_q isn't valid at this time, but
1765                  * irq_ptr->is_thinint_irq is */
1766                 q->tasklet.func=(void(*)(unsigned long))
1767                         ((irq_ptr->is_thinint_irq)?&tiqdio_inbound_processing:
1768                          &qdio_inbound_processing);
1769
1770                 /* actually this is not used for inbound queues. yet. */
1771                 atomic_set(&q->busy_siga_counter,0);
1772                 q->timing.busy_start=0;
1773
1774 /*              for (j=0;j<QDIO_STATS_NUMBER;j++)
1775                         q->timing.last_transfer_times[j]=(qdio_get_micros()/
1776                                                           QDIO_STATS_NUMBER)*j;
1777                 q->timing.last_transfer_index=QDIO_STATS_NUMBER-1;
1778 */
1779
1780                 /* fill in slib */
1781                 if (i>0) irq_ptr->input_qs[i-1]->slib->nsliba=
1782                                  (unsigned long)(q->slib);
1783                 q->slib->sla=(unsigned long)(q->sl);
1784                 q->slib->slsba=(unsigned long)(&q->slsb.acc.val[0]);
1785
1786                 /* fill in sl */
1787                 for (j=0;j<QDIO_MAX_BUFFERS_PER_Q;j++)
1788                         q->sl->element[j].sbal=(unsigned long)(q->sbal[j]);
1789
1790                 QDIO_DBF_TEXT2(0,setup,"sl-sb-b0");
1791                 ptr=(void*)q->sl;
1792                 QDIO_DBF_HEX2(0,setup,&ptr,sizeof(void*));
1793                 ptr=(void*)&q->slsb;
1794                 QDIO_DBF_HEX2(0,setup,&ptr,sizeof(void*));
1795                 ptr=(void*)q->sbal[0];
1796                 QDIO_DBF_HEX2(0,setup,&ptr,sizeof(void*));
1797
1798                 /* fill in slsb */
1799                 if (!irq_ptr->is_qebsm) {
1800                         unsigned int count = 1;
1801                         for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; j++)
1802                                 set_slsb(q, &j, SLSB_P_INPUT_NOT_INIT, &count);
1803                 }
1804         }
1805
1806         for (i=0;i<no_output_qs;i++) {
1807                 q=irq_ptr->output_qs[i];
1808                 memset(q,0,((char*)&q->slib)-((char*)q));
1809
1810                 sprintf(dbf_text,"outq%4x",i);
1811                 QDIO_DBF_TEXT0(0,setup,dbf_text);
1812                 QDIO_DBF_HEX0(0,setup,&q,sizeof(void*));
1813
1814                 memset(q->slib,0,PAGE_SIZE);
1815                 q->sl=(struct sl*)(((char*)q->slib)+PAGE_SIZE/2);
1816
1817                 available=0;
1818
1819                 for (j=0;j<QDIO_MAX_BUFFERS_PER_Q;j++)
1820                         q->sbal[j]=*(outbound_sbals_array++);
1821
1822                 q->queue_type=q_format;
1823                 if ((q->queue_type == QDIO_IQDIO_QFMT) &&
1824                     (no_output_qs > 1) &&
1825                     (i == no_output_qs-1))
1826                         q->queue_type = QDIO_IQDIO_QFMT_ASYNCH;
1827                 q->int_parm=int_parm;
1828                 q->is_input_q=0;
1829                 q->is_pci_out = 0;
1830                 q->schid = irq_ptr->schid;
1831                 q->cdev = cdev;
1832                 q->irq_ptr = irq_ptr;
1833                 q->mask=1<<(31-i);
1834                 q->q_no=i;
1835                 q->first_to_check=0;
1836                 q->last_move_ftc=0;
1837                 q->handler=output_handler;
1838
1839                 q->tasklet.data=(unsigned long)q;
1840                 q->tasklet.func=(void(*)(unsigned long))
1841                         &qdio_outbound_processing;
1842                 q->timer.function=(void(*)(unsigned long))
1843                         &qdio_outbound_processing;
1844                 q->timer.data = (long)q;
1845                 init_timer(&q->timer);
1846
1847                 atomic_set(&q->busy_siga_counter,0);
1848                 q->timing.busy_start=0;
1849
1850                 /* fill in slib */
1851                 if (i>0) irq_ptr->output_qs[i-1]->slib->nsliba=
1852                                  (unsigned long)(q->slib);
1853                 q->slib->sla=(unsigned long)(q->sl);
1854                 q->slib->slsba=(unsigned long)(&q->slsb.acc.val[0]);
1855
1856                 /* fill in sl */
1857                 for (j=0;j<QDIO_MAX_BUFFERS_PER_Q;j++)
1858                         q->sl->element[j].sbal=(unsigned long)(q->sbal[j]);
1859
1860                 QDIO_DBF_TEXT2(0,setup,"sl-sb-b0");
1861                 ptr=(void*)q->sl;
1862                 QDIO_DBF_HEX2(0,setup,&ptr,sizeof(void*));
1863                 ptr=(void*)&q->slsb;
1864                 QDIO_DBF_HEX2(0,setup,&ptr,sizeof(void*));
1865                 ptr=(void*)q->sbal[0];
1866                 QDIO_DBF_HEX2(0,setup,&ptr,sizeof(void*));
1867
1868                 /* fill in slsb */
1869                 if (!irq_ptr->is_qebsm) {
1870                         unsigned int count = 1;
1871                         for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; j++)
1872                                 set_slsb(q, &j, SLSB_P_OUTPUT_NOT_INIT, &count);
1873                 }
1874         }
1875 }
1876
1877 static void
1878 qdio_fill_thresholds(struct qdio_irq *irq_ptr,
1879                      unsigned int no_input_qs,
1880                      unsigned int no_output_qs,
1881                      unsigned int min_input_threshold,
1882                      unsigned int max_input_threshold,
1883                      unsigned int min_output_threshold,
1884                      unsigned int max_output_threshold)
1885 {
1886         int i;
1887         struct qdio_q *q;
1888
1889         for (i=0;i<no_input_qs;i++) {
1890                 q=irq_ptr->input_qs[i];
1891                 q->timing.threshold=max_input_threshold;
1892 /*              for (j=0;j<QDIO_STATS_CLASSES;j++) {
1893                         q->threshold_classes[j].threshold=
1894                                 min_input_threshold+
1895                                 (max_input_threshold-min_input_threshold)/
1896                                 QDIO_STATS_CLASSES;
1897                 }
1898                 qdio_use_thresholds(q,QDIO_STATS_CLASSES/2);*/
1899         }
1900         for (i=0;i<no_output_qs;i++) {
1901                 q=irq_ptr->output_qs[i];
1902                 q->timing.threshold=max_output_threshold;
1903 /*              for (j=0;j<QDIO_STATS_CLASSES;j++) {
1904                         q->threshold_classes[j].threshold=
1905                                 min_output_threshold+
1906                                 (max_output_threshold-min_output_threshold)/
1907                                 QDIO_STATS_CLASSES;
1908                 }
1909                 qdio_use_thresholds(q,QDIO_STATS_CLASSES/2);*/
1910         }
1911 }
1912
1913 static int
1914 tiqdio_thinint_handler(void)
1915 {
1916         QDIO_DBF_TEXT4(0,trace,"thin_int");
1917
1918         qdio_perf_stat_inc(&perf_stats.thinints);
1919
1920         /* SVS only when needed:
1921          * issue SVS to benefit from iqdio interrupt avoidance
1922          * (SVS clears AISOI)*/
1923         if (!omit_svs)
1924                 tiqdio_clear_global_summary();
1925
1926         tiqdio_inbound_checks();
1927         return 0;
1928 }
1929
1930 static void
1931 qdio_set_state(struct qdio_irq *irq_ptr, enum qdio_irq_states state)
1932 {
1933         int i;
1934 #ifdef CONFIG_QDIO_DEBUG
1935         char dbf_text[15];
1936
1937         QDIO_DBF_TEXT5(0,trace,"newstate");
1938         sprintf(dbf_text,"%4x%4x",irq_ptr->schid.sch_no,state);
1939         QDIO_DBF_TEXT5(0,trace,dbf_text);
1940 #endif /* CONFIG_QDIO_DEBUG */
1941
1942         irq_ptr->state=state;
1943         for (i=0;i<irq_ptr->no_input_qs;i++)
1944                 irq_ptr->input_qs[i]->state=state;
1945         for (i=0;i<irq_ptr->no_output_qs;i++)
1946                 irq_ptr->output_qs[i]->state=state;
1947         mb();
1948 }
1949
1950 static void
1951 qdio_irq_check_sense(struct subchannel_id schid, struct irb *irb)
1952 {
1953         char dbf_text[15];
1954
1955         if (irb->esw.esw0.erw.cons) {
1956                 sprintf(dbf_text,"sens%4x",schid.sch_no);
1957                 QDIO_DBF_TEXT2(1,trace,dbf_text);
1958                 QDIO_DBF_HEX0(0,sense,irb,QDIO_DBF_SENSE_LEN);
1959
1960                 QDIO_PRINT_WARN("sense data available on qdio channel.\n");
1961                 QDIO_HEXDUMP16(WARN,"irb: ",irb);
1962                 QDIO_HEXDUMP16(WARN,"sense data: ",irb->ecw);
1963         }
1964
1965 }
1966
1967 static void
1968 qdio_handle_pci(struct qdio_irq *irq_ptr)
1969 {
1970         int i;
1971         struct qdio_q *q;
1972
1973         qdio_perf_stat_inc(&perf_stats.pcis);
1974         for (i=0;i<irq_ptr->no_input_qs;i++) {
1975                 q=irq_ptr->input_qs[i];
1976                 if (q->is_input_q&QDIO_FLAG_NO_INPUT_INTERRUPT_CONTEXT)
1977                         qdio_mark_q(q);
1978                 else {
1979                         qdio_perf_stat_dec(&perf_stats.tl_runs);
1980                         __qdio_inbound_processing(q);
1981                 }
1982         }
1983         if (!irq_ptr->hydra_gives_outbound_pcis)
1984                 return;
1985         for (i=0;i<irq_ptr->no_output_qs;i++) {
1986                 q=irq_ptr->output_qs[i];
1987                 if (qdio_is_outbound_q_done(q))
1988                         continue;
1989                 qdio_perf_stat_dec(&perf_stats.tl_runs);
1990                 if (!irq_ptr->sync_done_on_outb_pcis)
1991                         SYNC_MEMORY;
1992                 __qdio_outbound_processing(q);
1993         }
1994 }
1995
1996 static void qdio_establish_handle_irq(struct ccw_device*, int, int);
1997
1998 static void
1999 qdio_handle_activate_check(struct ccw_device *cdev, unsigned long intparm,
2000                            int cstat, int dstat)
2001 {
2002         struct qdio_irq *irq_ptr;
2003         struct qdio_q *q;
2004         char dbf_text[15];
2005
2006         irq_ptr = cdev->private->qdio_data;
2007
2008         QDIO_DBF_TEXT2(1, trace, "ick2");
2009         sprintf(dbf_text,"%s", cdev->dev.bus_id);
2010         QDIO_DBF_TEXT2(1,trace,dbf_text);
2011         QDIO_DBF_HEX2(0,trace,&intparm,sizeof(int));
2012         QDIO_DBF_HEX2(0,trace,&dstat,sizeof(int));
2013         QDIO_DBF_HEX2(0,trace,&cstat,sizeof(int));
2014         QDIO_PRINT_ERR("received check condition on activate " \
2015                        "queues on device %s (cs=x%x, ds=x%x).\n",
2016                        cdev->dev.bus_id, cstat, dstat);
2017         if (irq_ptr->no_input_qs) {
2018                 q=irq_ptr->input_qs[0];
2019         } else if (irq_ptr->no_output_qs) {
2020                 q=irq_ptr->output_qs[0];
2021         } else {
2022                 QDIO_PRINT_ERR("oops... no queue registered for device %s!?\n",
2023                                cdev->dev.bus_id);
2024                 goto omit_handler_call;
2025         }
2026         q->handler(q->cdev,QDIO_STATUS_ACTIVATE_CHECK_CONDITION|
2027                    QDIO_STATUS_LOOK_FOR_ERROR,
2028                    0,0,0,-1,-1,q->int_parm);
2029 omit_handler_call:
2030         qdio_set_state(irq_ptr,QDIO_IRQ_STATE_STOPPED);
2031
2032 }
2033
2034 static void
2035 qdio_call_shutdown(struct work_struct *work)
2036 {
2037         struct ccw_device_private *priv;
2038         struct ccw_device *cdev;
2039
2040         priv = container_of(work, struct ccw_device_private, kick_work);
2041         cdev = priv->cdev;
2042         qdio_shutdown(cdev, QDIO_FLAG_CLEANUP_USING_CLEAR);
2043         put_device(&cdev->dev);
2044 }
2045
2046 static void
2047 qdio_timeout_handler(struct ccw_device *cdev)
2048 {
2049         struct qdio_irq *irq_ptr;
2050         char dbf_text[15];
2051
2052         QDIO_DBF_TEXT2(0, trace, "qtoh");
2053         sprintf(dbf_text, "%s", cdev->dev.bus_id);
2054         QDIO_DBF_TEXT2(0, trace, dbf_text);
2055
2056         irq_ptr = cdev->private->qdio_data;
2057         sprintf(dbf_text, "state:%d", irq_ptr->state);
2058         QDIO_DBF_TEXT2(0, trace, dbf_text);
2059
2060         switch (irq_ptr->state) {
2061         case QDIO_IRQ_STATE_INACTIVE:
2062                 QDIO_PRINT_ERR("establish queues on irq 0.%x.%04x: timed out\n",
2063                                irq_ptr->schid.ssid, irq_ptr->schid.sch_no);
2064                 QDIO_DBF_TEXT2(1,setup,"eq:timeo");
2065                 qdio_set_state(irq_ptr, QDIO_IRQ_STATE_ERR);
2066                 break;
2067         case QDIO_IRQ_STATE_CLEANUP:
2068                 QDIO_PRINT_INFO("Did not get interrupt on cleanup, "
2069                                 "irq=0.%x.%x.\n",
2070                                 irq_ptr->schid.ssid, irq_ptr->schid.sch_no);
2071                 qdio_set_state(irq_ptr, QDIO_IRQ_STATE_ERR);
2072                 break;
2073         case QDIO_IRQ_STATE_ESTABLISHED:
2074         case QDIO_IRQ_STATE_ACTIVE:
2075                 /* I/O has been terminated by common I/O layer. */
2076                 QDIO_PRINT_INFO("Queues on irq 0.%x.%04x killed by cio.\n",
2077                                 irq_ptr->schid.ssid, irq_ptr->schid.sch_no);
2078                 QDIO_DBF_TEXT2(1, trace, "cio:term");
2079                 qdio_set_state(irq_ptr, QDIO_IRQ_STATE_STOPPED);
2080                 if (get_device(&cdev->dev)) {
2081                         /* Can't call shutdown from interrupt context. */
2082                         PREPARE_WORK(&cdev->private->kick_work,
2083                                      qdio_call_shutdown);
2084                         queue_work(ccw_device_work, &cdev->private->kick_work);
2085                 }
2086                 break;
2087         default:
2088                 BUG();
2089         }
2090         ccw_device_set_timeout(cdev, 0);
2091         wake_up(&cdev->private->wait_q);
2092 }
2093
2094 static void
2095 qdio_handler(struct ccw_device *cdev, unsigned long intparm, struct irb *irb)
2096 {
2097         struct qdio_irq *irq_ptr;
2098         int cstat,dstat;
2099         char dbf_text[15];
2100
2101 #ifdef CONFIG_QDIO_DEBUG
2102         QDIO_DBF_TEXT4(0, trace, "qint");
2103         sprintf(dbf_text, "%s", cdev->dev.bus_id);
2104         QDIO_DBF_TEXT4(0, trace, dbf_text);
2105 #endif /* CONFIG_QDIO_DEBUG */
2106
2107         if (!intparm) {
2108                 QDIO_PRINT_ERR("got unsolicited interrupt in qdio " \
2109                                   "handler, device %s\n", cdev->dev.bus_id);
2110                 return;
2111         }
2112
2113         irq_ptr = cdev->private->qdio_data;
2114         if (!irq_ptr) {
2115                 QDIO_DBF_TEXT2(1, trace, "uint");
2116                 sprintf(dbf_text,"%s", cdev->dev.bus_id);
2117                 QDIO_DBF_TEXT2(1,trace,dbf_text);
2118                 QDIO_PRINT_ERR("received interrupt on unused device %s!\n",
2119                                cdev->dev.bus_id);
2120                 return;
2121         }
2122
2123         if (IS_ERR(irb)) {
2124                 /* Currently running i/o is in error. */
2125                 switch (PTR_ERR(irb)) {
2126                 case -EIO:
2127                         QDIO_PRINT_ERR("i/o error on device %s\n",
2128                                        cdev->dev.bus_id);
2129                         return;
2130                 case -ETIMEDOUT:
2131                         qdio_timeout_handler(cdev);
2132                         return;
2133                 default:
2134                         QDIO_PRINT_ERR("unknown error state %ld on device %s\n",
2135                                        PTR_ERR(irb), cdev->dev.bus_id);
2136                         return;
2137                 }
2138         }
2139
2140         qdio_irq_check_sense(irq_ptr->schid, irb);
2141
2142 #ifdef CONFIG_QDIO_DEBUG
2143         sprintf(dbf_text, "state:%d", irq_ptr->state);
2144         QDIO_DBF_TEXT4(0, trace, dbf_text);
2145 #endif /* CONFIG_QDIO_DEBUG */
2146
2147         cstat = irb->scsw.cstat;
2148         dstat = irb->scsw.dstat;
2149
2150         switch (irq_ptr->state) {
2151         case QDIO_IRQ_STATE_INACTIVE:
2152                 qdio_establish_handle_irq(cdev, cstat, dstat);
2153                 break;
2154
2155         case QDIO_IRQ_STATE_CLEANUP:
2156                 qdio_set_state(irq_ptr, QDIO_IRQ_STATE_INACTIVE);
2157                 break;
2158
2159         case QDIO_IRQ_STATE_ESTABLISHED:
2160         case QDIO_IRQ_STATE_ACTIVE:
2161                 if (cstat & SCHN_STAT_PCI) {
2162                         qdio_handle_pci(irq_ptr);
2163                         break;
2164                 }
2165
2166                 if ((cstat&~SCHN_STAT_PCI)||dstat) {
2167                         qdio_handle_activate_check(cdev, intparm, cstat, dstat);
2168                         break;
2169                 }
2170         default:
2171                 QDIO_PRINT_ERR("got interrupt for queues in state %d on " \
2172                                "device %s?!\n",
2173                                irq_ptr->state, cdev->dev.bus_id);
2174         }
2175         wake_up(&cdev->private->wait_q);
2176
2177 }
2178
2179 int
2180 qdio_synchronize(struct ccw_device *cdev, unsigned int flags,
2181                  unsigned int queue_number)
2182 {
2183         int cc = 0;
2184         struct qdio_q *q;
2185         struct qdio_irq *irq_ptr;
2186         void *ptr;
2187 #ifdef CONFIG_QDIO_DEBUG
2188         char dbf_text[15]="SyncXXXX";
2189 #endif
2190
2191         irq_ptr = cdev->private->qdio_data;
2192         if (!irq_ptr)
2193                 return -ENODEV;
2194
2195 #ifdef CONFIG_QDIO_DEBUG
2196         *((int*)(&dbf_text[4])) = irq_ptr->schid.sch_no;
2197         QDIO_DBF_HEX4(0,trace,dbf_text,QDIO_DBF_TRACE_LEN);
2198         *((int*)(&dbf_text[0]))=flags;
2199         *((int*)(&dbf_text[4]))=queue_number;
2200         QDIO_DBF_HEX4(0,trace,dbf_text,QDIO_DBF_TRACE_LEN);
2201 #endif /* CONFIG_QDIO_DEBUG */
2202
2203         if (flags&QDIO_FLAG_SYNC_INPUT) {
2204                 q=irq_ptr->input_qs[queue_number];
2205                 if (!q)
2206                         return -EINVAL;
2207                 if (!(irq_ptr->is_qebsm))
2208                         cc = do_siga_sync(q->schid, 0, q->mask);
2209         } else if (flags&QDIO_FLAG_SYNC_OUTPUT) {
2210                 q=irq_ptr->output_qs[queue_number];
2211                 if (!q)
2212                         return -EINVAL;
2213                 if (!(irq_ptr->is_qebsm))
2214                         cc = do_siga_sync(q->schid, q->mask, 0);
2215         } else
2216                 return -EINVAL;
2217
2218         ptr=&cc;
2219         if (cc)
2220                 QDIO_DBF_HEX3(0,trace,&ptr,sizeof(int));
2221
2222         return cc;
2223 }
2224
2225 static void
2226 qdio_check_subchannel_qebsm(struct qdio_irq *irq_ptr, unsigned char qdioac,
2227                             unsigned long token)
2228 {
2229         struct qdio_q *q;
2230         int i;
2231         unsigned int count, start_buf;
2232         char dbf_text[15];
2233
2234         /*check if QEBSM is disabled */
2235         if (!(irq_ptr->is_qebsm) || !(qdioac & 0x01)) {
2236                 irq_ptr->is_qebsm  = 0;
2237                 irq_ptr->sch_token = 0;
2238                 irq_ptr->qib.rflags &= ~QIB_RFLAGS_ENABLE_QEBSM;
2239                 QDIO_DBF_TEXT0(0,setup,"noV=V");
2240                 return;
2241         }
2242         irq_ptr->sch_token = token;
2243         /*input queue*/
2244         for (i = 0; i < irq_ptr->no_input_qs;i++) {
2245                 q = irq_ptr->input_qs[i];
2246                 count = QDIO_MAX_BUFFERS_PER_Q;
2247                 start_buf = 0;
2248                 set_slsb(q, &start_buf, SLSB_P_INPUT_NOT_INIT, &count);
2249         }
2250         sprintf(dbf_text,"V=V:%2x",irq_ptr->is_qebsm);
2251         QDIO_DBF_TEXT0(0,setup,dbf_text);
2252         sprintf(dbf_text,"%8lx",irq_ptr->sch_token);
2253         QDIO_DBF_TEXT0(0,setup,dbf_text);
2254         /*output queue*/
2255         for (i = 0; i < irq_ptr->no_output_qs; i++) {
2256                 q = irq_ptr->output_qs[i];
2257                 count = QDIO_MAX_BUFFERS_PER_Q;
2258                 start_buf = 0;
2259                 set_slsb(q, &start_buf, SLSB_P_OUTPUT_NOT_INIT, &count);
2260         }
2261 }
2262
2263 static void
2264 qdio_get_ssqd_information(struct qdio_irq *irq_ptr)
2265 {
2266         int result;
2267         unsigned char qdioac;
2268         struct {
2269                 struct chsc_header request;
2270                 u16 reserved1:10;
2271                 u16 ssid:2;
2272                 u16 fmt:4;
2273                 u16 first_sch;
2274                 u16 reserved2;
2275                 u16 last_sch;
2276                 u32 reserved3;
2277                 struct chsc_header response;
2278                 u32 reserved4;
2279                 u8  flags;
2280                 u8  reserved5;
2281                 u16 sch;
2282                 u8  qfmt;
2283                 u8  parm;
2284                 u8  qdioac1;
2285                 u8  sch_class;
2286                 u8  reserved7;
2287                 u8  icnt;
2288                 u8  reserved8;
2289                 u8  ocnt;
2290                 u8 reserved9;
2291                 u8 mbccnt;
2292                 u16 qdioac2;
2293                 u64 sch_token;
2294         } *ssqd_area;
2295
2296         QDIO_DBF_TEXT0(0,setup,"getssqd");
2297         qdioac = 0;
2298         ssqd_area = mempool_alloc(qdio_mempool_scssc, GFP_ATOMIC);
2299         if (!ssqd_area) {
2300                 QDIO_PRINT_WARN("Could not get memory for chsc. Using all " \
2301                                 "SIGAs for sch x%x.\n", irq_ptr->schid.sch_no);
2302                 irq_ptr->qdioac = CHSC_FLAG_SIGA_INPUT_NECESSARY |
2303                                   CHSC_FLAG_SIGA_OUTPUT_NECESSARY |
2304                                   CHSC_FLAG_SIGA_SYNC_NECESSARY; /* all flags set */
2305                 irq_ptr->is_qebsm = 0;
2306                 irq_ptr->sch_token = 0;
2307                 irq_ptr->qib.rflags &= ~QIB_RFLAGS_ENABLE_QEBSM;
2308                 return;
2309         }
2310
2311         ssqd_area->request = (struct chsc_header) {
2312                 .length = 0x0010,
2313                 .code   = 0x0024,
2314         };
2315         ssqd_area->first_sch = irq_ptr->schid.sch_no;
2316         ssqd_area->last_sch = irq_ptr->schid.sch_no;
2317         ssqd_area->ssid = irq_ptr->schid.ssid;
2318         result = chsc(ssqd_area);
2319
2320         if (result) {
2321                 QDIO_PRINT_WARN("CHSC returned cc %i. Using all " \
2322                                 "SIGAs for sch 0.%x.%x.\n", result,
2323                                 irq_ptr->schid.ssid, irq_ptr->schid.sch_no);
2324                 qdioac = CHSC_FLAG_SIGA_INPUT_NECESSARY |
2325                         CHSC_FLAG_SIGA_OUTPUT_NECESSARY |
2326                         CHSC_FLAG_SIGA_SYNC_NECESSARY; /* all flags set */
2327                 irq_ptr->is_qebsm  = 0;
2328                 goto out;
2329         }
2330
2331         if (ssqd_area->response.code != QDIO_CHSC_RESPONSE_CODE_OK) {
2332                 QDIO_PRINT_WARN("response upon checking SIGA needs " \
2333                                 "is 0x%x. Using all SIGAs for sch 0.%x.%x.\n",
2334                                 ssqd_area->response.code,
2335                                 irq_ptr->schid.ssid, irq_ptr->schid.sch_no);
2336                 qdioac = CHSC_FLAG_SIGA_INPUT_NECESSARY |
2337                         CHSC_FLAG_SIGA_OUTPUT_NECESSARY |
2338                         CHSC_FLAG_SIGA_SYNC_NECESSARY; /* all flags set */
2339                 irq_ptr->is_qebsm  = 0;
2340                 goto out;
2341         }
2342         if (!(ssqd_area->flags & CHSC_FLAG_QDIO_CAPABILITY) ||
2343             !(ssqd_area->flags & CHSC_FLAG_VALIDITY) ||
2344             (ssqd_area->sch != irq_ptr->schid.sch_no)) {
2345                 QDIO_PRINT_WARN("huh? problems checking out sch 0.%x.%x... " \
2346                                 "using all SIGAs.\n",
2347                                 irq_ptr->schid.ssid, irq_ptr->schid.sch_no);
2348                 qdioac = CHSC_FLAG_SIGA_INPUT_NECESSARY |
2349                         CHSC_FLAG_SIGA_OUTPUT_NECESSARY |
2350                         CHSC_FLAG_SIGA_SYNC_NECESSARY; /* worst case */
2351                 irq_ptr->is_qebsm  = 0;
2352                 goto out;
2353         }
2354         qdioac = ssqd_area->qdioac1;
2355 out:
2356         qdio_check_subchannel_qebsm(irq_ptr, qdioac,
2357                                     ssqd_area->sch_token);
2358         mempool_free(ssqd_area, qdio_mempool_scssc);
2359         irq_ptr->qdioac = qdioac;
2360 }
2361
2362 static unsigned int
2363 tiqdio_check_chsc_availability(void)
2364 {
2365         char dbf_text[15];
2366
2367         if (!css_characteristics_avail)
2368                 return -EIO;
2369
2370         /* Check for bit 41. */
2371         if (!css_general_characteristics.aif) {
2372                 QDIO_PRINT_WARN("Adapter interruption facility not " \
2373                                 "installed.\n");
2374                 return -ENOENT;
2375         }
2376
2377         /* Check for bits 107 and 108. */
2378         if (!css_chsc_characteristics.scssc ||
2379             !css_chsc_characteristics.scsscf) {
2380                 QDIO_PRINT_WARN("Set Chan Subsys. Char. & Fast-CHSCs " \
2381                                 "not available.\n");
2382                 return -ENOENT;
2383         }
2384
2385         /* Check for OSA/FCP thin interrupts (bit 67). */
2386         hydra_thinints = css_general_characteristics.aif_osa;
2387         sprintf(dbf_text,"hydrati%1x", hydra_thinints);
2388         QDIO_DBF_TEXT0(0,setup,dbf_text);
2389
2390 #ifdef CONFIG_64BIT
2391         /* Check for QEBSM support in general (bit 58). */
2392         is_passthrough = css_general_characteristics.qebsm;
2393 #endif
2394         sprintf(dbf_text,"cssQBS:%1x", is_passthrough);
2395         QDIO_DBF_TEXT0(0,setup,dbf_text);
2396
2397         /* Check for aif time delay disablement fac (bit 56). If installed,
2398          * omit svs even under lpar (good point by rick again) */
2399         omit_svs = css_general_characteristics.aif_tdd;
2400         sprintf(dbf_text,"omitsvs%1x", omit_svs);
2401         QDIO_DBF_TEXT0(0,setup,dbf_text);
2402         return 0;
2403 }
2404
2405
2406 static unsigned int
2407 tiqdio_set_subchannel_ind(struct qdio_irq *irq_ptr, int reset_to_zero)
2408 {
2409         unsigned long real_addr_local_summary_bit;
2410         unsigned long real_addr_dev_st_chg_ind;
2411         void *ptr;
2412         char dbf_text[15];
2413
2414         unsigned int resp_code;
2415         int result;
2416
2417         struct {
2418                 struct chsc_header request;
2419                 u16 operation_code;
2420                 u16 reserved1;
2421                 u32 reserved2;
2422                 u32 reserved3;
2423                 u64 summary_indicator_addr;
2424                 u64 subchannel_indicator_addr;
2425                 u32 ks:4;
2426                 u32 kc:4;
2427                 u32 reserved4:21;
2428                 u32 isc:3;
2429                 u32 word_with_d_bit;
2430                 /* set to 0x10000000 to enable
2431                  * time delay disablement facility */
2432                 u32 reserved5;
2433                 struct subchannel_id schid;
2434                 u32 reserved6[1004];
2435                 struct chsc_header response;
2436                 u32 reserved7;
2437         } *scssc_area;
2438
2439         if (!irq_ptr->is_thinint_irq)
2440                 return -ENODEV;
2441
2442         if (reset_to_zero) {
2443                 real_addr_local_summary_bit=0;
2444                 real_addr_dev_st_chg_ind=0;
2445         } else {
2446                 real_addr_local_summary_bit=
2447                         virt_to_phys((volatile void *)indicators);
2448                 real_addr_dev_st_chg_ind=
2449                         virt_to_phys((volatile void *)irq_ptr->dev_st_chg_ind);
2450         }
2451
2452         scssc_area = mempool_alloc(qdio_mempool_scssc, GFP_ATOMIC);
2453         if (!scssc_area) {
2454                 QDIO_PRINT_WARN("No memory for setting indicators on " \
2455                                 "subchannel 0.%x.%x.\n",
2456                                 irq_ptr->schid.ssid, irq_ptr->schid.sch_no);
2457                 return -ENOMEM;
2458         }
2459         scssc_area->request = (struct chsc_header) {
2460                 .length = 0x0fe0,
2461                 .code   = 0x0021,
2462         };
2463         scssc_area->operation_code = 0;
2464
2465         scssc_area->summary_indicator_addr = real_addr_local_summary_bit;
2466         scssc_area->subchannel_indicator_addr = real_addr_dev_st_chg_ind;
2467         scssc_area->ks = QDIO_STORAGE_KEY;
2468         scssc_area->kc = QDIO_STORAGE_KEY;
2469         scssc_area->isc = TIQDIO_THININT_ISC;
2470         scssc_area->schid = irq_ptr->schid;
2471         /* enables the time delay disablement facility. Don't care
2472          * whether it is really there (i.e. we haven't checked for
2473          * it) */
2474         if (css_general_characteristics.aif_tdd)
2475                 scssc_area->word_with_d_bit = 0x10000000;
2476         else
2477                 QDIO_PRINT_WARN("Time delay disablement facility " \
2478                                 "not available\n");
2479
2480         result = chsc(scssc_area);
2481         if (result) {
2482                 QDIO_PRINT_WARN("could not set indicators on irq 0.%x.%x, " \
2483                                 "cc=%i.\n",
2484                                 irq_ptr->schid.ssid, irq_ptr->schid.sch_no,result);
2485                 result = -EIO;
2486                 goto out;
2487         }
2488
2489         resp_code = scssc_area->response.code;
2490         if (resp_code!=QDIO_CHSC_RESPONSE_CODE_OK) {
2491                 QDIO_PRINT_WARN("response upon setting indicators " \
2492                                 "is 0x%x.\n",resp_code);
2493                 sprintf(dbf_text,"sidR%4x",resp_code);
2494                 QDIO_DBF_TEXT1(0,trace,dbf_text);
2495                 QDIO_DBF_TEXT1(0,setup,dbf_text);
2496                 ptr=&scssc_area->response;
2497                 QDIO_DBF_HEX2(1,setup,&ptr,QDIO_DBF_SETUP_LEN);
2498                 result = -EIO;
2499                 goto out;
2500         }
2501
2502         QDIO_DBF_TEXT2(0,setup,"setscind");
2503         QDIO_DBF_HEX2(0,setup,&real_addr_local_summary_bit,
2504                       sizeof(unsigned long));
2505         QDIO_DBF_HEX2(0,setup,&real_addr_dev_st_chg_ind,sizeof(unsigned long));
2506         result = 0;
2507 out:
2508         mempool_free(scssc_area, qdio_mempool_scssc);
2509         return result;
2510
2511 }
2512
2513 static unsigned int
2514 tiqdio_set_delay_target(struct qdio_irq *irq_ptr, unsigned long delay_target)
2515 {
2516         unsigned int resp_code;
2517         int result;
2518         void *ptr;
2519         char dbf_text[15];
2520
2521         struct {
2522                 struct chsc_header request;
2523                 u16 operation_code;
2524                 u16 reserved1;
2525                 u32 reserved2;
2526                 u32 reserved3;
2527                 u32 reserved4[2];
2528                 u32 delay_target;
2529                 u32 reserved5[1009];
2530                 struct chsc_header response;
2531                 u32 reserved6;
2532         } *scsscf_area;
2533
2534         if (!irq_ptr->is_thinint_irq)
2535                 return -ENODEV;
2536
2537         scsscf_area = mempool_alloc(qdio_mempool_scssc, GFP_ATOMIC);
2538         if (!scsscf_area) {
2539                 QDIO_PRINT_WARN("No memory for setting delay target on " \
2540                                 "subchannel 0.%x.%x.\n",
2541                                 irq_ptr->schid.ssid, irq_ptr->schid.sch_no);
2542                 return -ENOMEM;
2543         }
2544         scsscf_area->request = (struct chsc_header) {
2545                 .length = 0x0fe0,
2546                 .code   = 0x1027,
2547         };
2548
2549         scsscf_area->delay_target = delay_target<<16;
2550
2551         result=chsc(scsscf_area);
2552         if (result) {
2553                 QDIO_PRINT_WARN("could not set delay target on irq 0.%x.%x, " \
2554                                 "cc=%i. Continuing.\n",
2555                                 irq_ptr->schid.ssid, irq_ptr->schid.sch_no,
2556                                 result);
2557                 result = -EIO;
2558                 goto out;
2559         }
2560
2561         resp_code = scsscf_area->response.code;
2562         if (resp_code!=QDIO_CHSC_RESPONSE_CODE_OK) {
2563                 QDIO_PRINT_WARN("response upon setting delay target " \
2564                                 "is 0x%x. Continuing.\n",resp_code);
2565                 sprintf(dbf_text,"sdtR%4x",resp_code);
2566                 QDIO_DBF_TEXT1(0,trace,dbf_text);
2567                 QDIO_DBF_TEXT1(0,setup,dbf_text);
2568                 ptr=&scsscf_area->response;
2569                 QDIO_DBF_HEX2(1,trace,&ptr,QDIO_DBF_TRACE_LEN);
2570         }
2571         QDIO_DBF_TEXT2(0,trace,"delytrgt");
2572         QDIO_DBF_HEX2(0,trace,&delay_target,sizeof(unsigned long));
2573         result = 0; /* not critical */
2574 out:
2575         mempool_free(scsscf_area, qdio_mempool_scssc);
2576         return result;
2577 }
2578
2579 int
2580 qdio_cleanup(struct ccw_device *cdev, int how)
2581 {
2582         struct qdio_irq *irq_ptr;
2583         char dbf_text[15];
2584         int rc;
2585
2586         irq_ptr = cdev->private->qdio_data;
2587         if (!irq_ptr)
2588                 return -ENODEV;
2589
2590         sprintf(dbf_text,"qcln%4x",irq_ptr->schid.sch_no);
2591         QDIO_DBF_TEXT1(0,trace,dbf_text);
2592         QDIO_DBF_TEXT0(0,setup,dbf_text);
2593
2594         rc = qdio_shutdown(cdev, how);
2595         if ((rc == 0) || (rc == -EINPROGRESS))
2596                 rc = qdio_free(cdev);
2597         return rc;
2598 }
2599
2600 int
2601 qdio_shutdown(struct ccw_device *cdev, int how)
2602 {
2603         struct qdio_irq *irq_ptr;
2604         int i;
2605         int result = 0;
2606         int rc;
2607         unsigned long flags;
2608         int timeout;
2609         char dbf_text[15];
2610
2611         irq_ptr = cdev->private->qdio_data;
2612         if (!irq_ptr)
2613                 return -ENODEV;
2614
2615         down(&irq_ptr->setting_up_sema);
2616
2617         sprintf(dbf_text,"qsqs%4x",irq_ptr->schid.sch_no);
2618         QDIO_DBF_TEXT1(0,trace,dbf_text);
2619         QDIO_DBF_TEXT0(0,setup,dbf_text);
2620
2621         /* mark all qs as uninteresting */
2622         for (i=0;i<irq_ptr->no_input_qs;i++)
2623                 atomic_set(&irq_ptr->input_qs[i]->is_in_shutdown,1);
2624
2625         for (i=0;i<irq_ptr->no_output_qs;i++)
2626                 atomic_set(&irq_ptr->output_qs[i]->is_in_shutdown,1);
2627
2628         tasklet_kill(&tiqdio_tasklet);
2629
2630         for (i=0;i<irq_ptr->no_input_qs;i++) {
2631                 qdio_unmark_q(irq_ptr->input_qs[i]);
2632                 tasklet_kill(&irq_ptr->input_qs[i]->tasklet);
2633                 wait_event_interruptible_timeout(cdev->private->wait_q,
2634                                                  !atomic_read(&irq_ptr->
2635                                                               input_qs[i]->
2636                                                               use_count),
2637                                                  QDIO_NO_USE_COUNT_TIMEOUT);
2638                 if (atomic_read(&irq_ptr->input_qs[i]->use_count))
2639                         result=-EINPROGRESS;
2640         }
2641
2642         for (i=0;i<irq_ptr->no_output_qs;i++) {
2643                 tasklet_kill(&irq_ptr->output_qs[i]->tasklet);
2644                 del_timer(&irq_ptr->output_qs[i]->timer);
2645                 wait_event_interruptible_timeout(cdev->private->wait_q,
2646                                                  !atomic_read(&irq_ptr->
2647                                                               output_qs[i]->
2648                                                               use_count),
2649                                                  QDIO_NO_USE_COUNT_TIMEOUT);
2650                 if (atomic_read(&irq_ptr->output_qs[i]->use_count))
2651                         result=-EINPROGRESS;
2652         }
2653
2654         /* cleanup subchannel */
2655         spin_lock_irqsave(get_ccwdev_lock(cdev),flags);
2656         if (how&QDIO_FLAG_CLEANUP_USING_CLEAR) {
2657                 rc = ccw_device_clear(cdev, QDIO_DOING_CLEANUP);
2658                 timeout=QDIO_CLEANUP_CLEAR_TIMEOUT;
2659         } else if (how&QDIO_FLAG_CLEANUP_USING_HALT) {
2660                 rc = ccw_device_halt(cdev, QDIO_DOING_CLEANUP);
2661                 timeout=QDIO_CLEANUP_HALT_TIMEOUT;
2662         } else { /* default behaviour */
2663                 rc = ccw_device_halt(cdev, QDIO_DOING_CLEANUP);
2664                 timeout=QDIO_CLEANUP_HALT_TIMEOUT;
2665         }
2666         if (rc == -ENODEV) {
2667                 /* No need to wait for device no longer present. */
2668                 qdio_set_state(irq_ptr, QDIO_IRQ_STATE_INACTIVE);
2669                 spin_unlock_irqrestore(get_ccwdev_lock(cdev), flags);
2670         } else if (((void *)cdev->handler != (void *)qdio_handler) && rc == 0) {
2671                 /*
2672                  * Whoever put another handler there, has to cope with the
2673                  * interrupt theirself. Might happen if qdio_shutdown was
2674                  * called on already shutdown queues, but this shouldn't have
2675                  * bad side effects.
2676                  */
2677                 qdio_set_state(irq_ptr, QDIO_IRQ_STATE_INACTIVE);
2678                 spin_unlock_irqrestore(get_ccwdev_lock(cdev), flags);
2679         } else if (rc == 0) {
2680                 qdio_set_state(irq_ptr, QDIO_IRQ_STATE_CLEANUP);
2681                 ccw_device_set_timeout(cdev, timeout);
2682                 spin_unlock_irqrestore(get_ccwdev_lock(cdev),flags);
2683
2684                 wait_event(cdev->private->wait_q,
2685                            irq_ptr->state == QDIO_IRQ_STATE_INACTIVE ||
2686                            irq_ptr->state == QDIO_IRQ_STATE_ERR);
2687         } else {
2688                 QDIO_PRINT_INFO("ccw_device_{halt,clear} returned %d for "
2689                                 "device %s\n", result, cdev->dev.bus_id);
2690                 spin_unlock_irqrestore(get_ccwdev_lock(cdev), flags);
2691                 result = rc;
2692                 goto out;
2693         }
2694         if (irq_ptr->is_thinint_irq) {
2695                 qdio_put_indicator((__u32*)irq_ptr->dev_st_chg_ind);
2696                 tiqdio_set_subchannel_ind(irq_ptr,1);
2697                 /* reset adapter interrupt indicators */
2698         }
2699
2700         /* exchange int handlers, if necessary */
2701         if ((void*)cdev->handler == (void*)qdio_handler)
2702                 cdev->handler=irq_ptr->original_int_handler;
2703
2704         /* Ignore errors. */
2705         qdio_set_state(irq_ptr, QDIO_IRQ_STATE_INACTIVE);
2706         ccw_device_set_timeout(cdev, 0);
2707 out:
2708         up(&irq_ptr->setting_up_sema);
2709         return result;
2710 }
2711
2712 int
2713 qdio_free(struct ccw_device *cdev)
2714 {
2715         struct qdio_irq *irq_ptr;
2716         char dbf_text[15];
2717
2718         irq_ptr = cdev->private->qdio_data;
2719         if (!irq_ptr)
2720                 return -ENODEV;
2721
2722         down(&irq_ptr->setting_up_sema);
2723
2724         sprintf(dbf_text,"qfqs%4x",irq_ptr->schid.sch_no);
2725         QDIO_DBF_TEXT1(0,trace,dbf_text);
2726         QDIO_DBF_TEXT0(0,setup,dbf_text);
2727
2728         cdev->private->qdio_data = NULL;
2729
2730         up(&irq_ptr->setting_up_sema);
2731
2732         qdio_release_irq_memory(irq_ptr);
2733         module_put(THIS_MODULE);
2734         return 0;
2735 }
2736
2737 static void
2738 qdio_allocate_do_dbf(struct qdio_initialize *init_data)
2739 {
2740         char dbf_text[20]; /* if a printf printed out more than 8 chars */
2741
2742         sprintf(dbf_text,"qfmt:%x",init_data->q_format);
2743         QDIO_DBF_TEXT0(0,setup,dbf_text);
2744         QDIO_DBF_HEX0(0,setup,init_data->adapter_name,8);
2745         sprintf(dbf_text,"qpff%4x",init_data->qib_param_field_format);
2746         QDIO_DBF_TEXT0(0,setup,dbf_text);
2747         QDIO_DBF_HEX0(0,setup,&init_data->qib_param_field,sizeof(char*));
2748         QDIO_DBF_HEX0(0,setup,&init_data->input_slib_elements,sizeof(long*));
2749         QDIO_DBF_HEX0(0,setup,&init_data->output_slib_elements,sizeof(long*));
2750         sprintf(dbf_text,"miit%4x",init_data->min_input_threshold);
2751         QDIO_DBF_TEXT0(0,setup,dbf_text);
2752         sprintf(dbf_text,"mait%4x",init_data->max_input_threshold);
2753         QDIO_DBF_TEXT0(0,setup,dbf_text);
2754         sprintf(dbf_text,"miot%4x",init_data->min_output_threshold);
2755         QDIO_DBF_TEXT0(0,setup,dbf_text);
2756         sprintf(dbf_text,"maot%4x",init_data->max_output_threshold);
2757         QDIO_DBF_TEXT0(0,setup,dbf_text);
2758         sprintf(dbf_text,"niq:%4x",init_data->no_input_qs);
2759         QDIO_DBF_TEXT0(0,setup,dbf_text);
2760         sprintf(dbf_text,"noq:%4x",init_data->no_output_qs);
2761         QDIO_DBF_TEXT0(0,setup,dbf_text);
2762         QDIO_DBF_HEX0(0,setup,&init_data->input_handler,sizeof(void*));
2763         QDIO_DBF_HEX0(0,setup,&init_data->output_handler,sizeof(void*));
2764         QDIO_DBF_HEX0(0,setup,&init_data->int_parm,sizeof(long));
2765         QDIO_DBF_HEX0(0,setup,&init_data->flags,sizeof(long));
2766         QDIO_DBF_HEX0(0,setup,&init_data->input_sbal_addr_array,sizeof(void*));
2767         QDIO_DBF_HEX0(0,setup,&init_data->output_sbal_addr_array,sizeof(void*));
2768 }
2769
2770 static void
2771 qdio_allocate_fill_input_desc(struct qdio_irq *irq_ptr, int i, int iqfmt)
2772 {
2773         irq_ptr->input_qs[i]->is_iqdio_q = iqfmt;
2774         irq_ptr->input_qs[i]->is_thinint_q = irq_ptr->is_thinint_irq;
2775
2776         irq_ptr->qdr->qdf0[i].sliba=(unsigned long)(irq_ptr->input_qs[i]->slib);
2777
2778         irq_ptr->qdr->qdf0[i].sla=(unsigned long)(irq_ptr->input_qs[i]->sl);
2779
2780         irq_ptr->qdr->qdf0[i].slsba=
2781                 (unsigned long)(&irq_ptr->input_qs[i]->slsb.acc.val[0]);
2782
2783         irq_ptr->qdr->qdf0[i].akey=QDIO_STORAGE_KEY;
2784         irq_ptr->qdr->qdf0[i].bkey=QDIO_STORAGE_KEY;
2785         irq_ptr->qdr->qdf0[i].ckey=QDIO_STORAGE_KEY;
2786         irq_ptr->qdr->qdf0[i].dkey=QDIO_STORAGE_KEY;
2787 }
2788
2789 static void
2790 qdio_allocate_fill_output_desc(struct qdio_irq *irq_ptr, int i,
2791                                int j, int iqfmt)
2792 {
2793         irq_ptr->output_qs[i]->is_iqdio_q = iqfmt;
2794         irq_ptr->output_qs[i]->is_thinint_q = irq_ptr->is_thinint_irq;
2795
2796         irq_ptr->qdr->qdf0[i+j].sliba=(unsigned long)(irq_ptr->output_qs[i]->slib);
2797
2798         irq_ptr->qdr->qdf0[i+j].sla=(unsigned long)(irq_ptr->output_qs[i]->sl);
2799
2800         irq_ptr->qdr->qdf0[i+j].slsba=
2801                 (unsigned long)(&irq_ptr->output_qs[i]->slsb.acc.val[0]);
2802
2803         irq_ptr->qdr->qdf0[i+j].akey=QDIO_STORAGE_KEY;
2804         irq_ptr->qdr->qdf0[i+j].bkey=QDIO_STORAGE_KEY;
2805         irq_ptr->qdr->qdf0[i+j].ckey=QDIO_STORAGE_KEY;
2806         irq_ptr->qdr->qdf0[i+j].dkey=QDIO_STORAGE_KEY;
2807 }
2808
2809
2810 static void
2811 qdio_initialize_set_siga_flags_input(struct qdio_irq *irq_ptr)
2812 {
2813         int i;
2814
2815         for (i=0;i<irq_ptr->no_input_qs;i++) {
2816                 irq_ptr->input_qs[i]->siga_sync=
2817                         irq_ptr->qdioac&CHSC_FLAG_SIGA_SYNC_NECESSARY;
2818                 irq_ptr->input_qs[i]->siga_in=
2819                         irq_ptr->qdioac&CHSC_FLAG_SIGA_INPUT_NECESSARY;
2820                 irq_ptr->input_qs[i]->siga_out=
2821                         irq_ptr->qdioac&CHSC_FLAG_SIGA_OUTPUT_NECESSARY;
2822                 irq_ptr->input_qs[i]->siga_sync_done_on_thinints=
2823                         irq_ptr->qdioac&CHSC_FLAG_SIGA_SYNC_DONE_ON_THININTS;
2824                 irq_ptr->input_qs[i]->hydra_gives_outbound_pcis=
2825                         irq_ptr->hydra_gives_outbound_pcis;
2826                 irq_ptr->input_qs[i]->siga_sync_done_on_outb_tis=
2827                         ((irq_ptr->qdioac&
2828                           (CHSC_FLAG_SIGA_SYNC_DONE_ON_OUTB_PCIS|
2829                            CHSC_FLAG_SIGA_SYNC_DONE_ON_THININTS))==
2830                          (CHSC_FLAG_SIGA_SYNC_DONE_ON_OUTB_PCIS|
2831                           CHSC_FLAG_SIGA_SYNC_DONE_ON_THININTS));
2832
2833         }
2834 }
2835
2836 static void
2837 qdio_initialize_set_siga_flags_output(struct qdio_irq *irq_ptr)
2838 {
2839         int i;
2840
2841         for (i=0;i<irq_ptr->no_output_qs;i++) {
2842                 irq_ptr->output_qs[i]->siga_sync=
2843                         irq_ptr->qdioac&CHSC_FLAG_SIGA_SYNC_NECESSARY;
2844                 irq_ptr->output_qs[i]->siga_in=
2845                         irq_ptr->qdioac&CHSC_FLAG_SIGA_INPUT_NECESSARY;
2846                 irq_ptr->output_qs[i]->siga_out=
2847                         irq_ptr->qdioac&CHSC_FLAG_SIGA_OUTPUT_NECESSARY;
2848                 irq_ptr->output_qs[i]->siga_sync_done_on_thinints=
2849                         irq_ptr->qdioac&CHSC_FLAG_SIGA_SYNC_DONE_ON_THININTS;
2850                 irq_ptr->output_qs[i]->hydra_gives_outbound_pcis=
2851                         irq_ptr->hydra_gives_outbound_pcis;
2852                 irq_ptr->output_qs[i]->siga_sync_done_on_outb_tis=
2853                         ((irq_ptr->qdioac&
2854                           (CHSC_FLAG_SIGA_SYNC_DONE_ON_OUTB_PCIS|
2855                            CHSC_FLAG_SIGA_SYNC_DONE_ON_THININTS))==
2856                          (CHSC_FLAG_SIGA_SYNC_DONE_ON_OUTB_PCIS|
2857                           CHSC_FLAG_SIGA_SYNC_DONE_ON_THININTS));
2858
2859         }
2860 }
2861
2862 static int
2863 qdio_establish_irq_check_for_errors(struct ccw_device *cdev, int cstat,
2864                                     int dstat)
2865 {
2866         char dbf_text[15];
2867         struct qdio_irq *irq_ptr;
2868
2869         irq_ptr = cdev->private->qdio_data;
2870
2871         if (cstat || (dstat & ~(DEV_STAT_CHN_END|DEV_STAT_DEV_END))) {
2872                 sprintf(dbf_text,"ick1%4x",irq_ptr->schid.sch_no);
2873                 QDIO_DBF_TEXT2(1,trace,dbf_text);
2874                 QDIO_DBF_HEX2(0,trace,&dstat,sizeof(int));
2875                 QDIO_DBF_HEX2(0,trace,&cstat,sizeof(int));
2876                 QDIO_PRINT_ERR("received check condition on establish " \
2877                                "queues on irq 0.%x.%x (cs=x%x, ds=x%x).\n",
2878                                irq_ptr->schid.ssid, irq_ptr->schid.sch_no,
2879                                cstat,dstat);
2880                 qdio_set_state(irq_ptr,QDIO_IRQ_STATE_ERR);
2881         }
2882
2883         if (!(dstat & DEV_STAT_DEV_END)) {
2884                 QDIO_DBF_TEXT2(1,setup,"eq:no de");
2885                 QDIO_DBF_HEX2(0,setup,&dstat, sizeof(dstat));
2886                 QDIO_DBF_HEX2(0,setup,&cstat, sizeof(cstat));
2887                 QDIO_PRINT_ERR("establish queues on irq 0.%x.%04x: didn't get "
2888                                "device end: dstat=%02x, cstat=%02x\n",
2889                                irq_ptr->schid.ssid, irq_ptr->schid.sch_no,
2890                                dstat, cstat);
2891                 qdio_set_state(irq_ptr, QDIO_IRQ_STATE_ERR);
2892                 return 1;
2893         }
2894
2895         if (dstat & ~(DEV_STAT_CHN_END|DEV_STAT_DEV_END)) {
2896                 QDIO_DBF_TEXT2(1,setup,"eq:badio");
2897                 QDIO_DBF_HEX2(0,setup,&dstat, sizeof(dstat));
2898                 QDIO_DBF_HEX2(0,setup,&cstat, sizeof(cstat));
2899                 QDIO_PRINT_ERR("establish queues on irq 0.%x.%04x: got "
2900                                "the following devstat: dstat=%02x, "
2901                                "cstat=%02x\n", irq_ptr->schid.ssid,
2902                                irq_ptr->schid.sch_no, dstat, cstat);
2903                 qdio_set_state(irq_ptr, QDIO_IRQ_STATE_ERR);
2904                 return 1;
2905         }
2906         return 0;
2907 }
2908
2909 static void
2910 qdio_establish_handle_irq(struct ccw_device *cdev, int cstat, int dstat)
2911 {
2912         struct qdio_irq *irq_ptr;
2913         char dbf_text[15];
2914
2915         irq_ptr = cdev->private->qdio_data;
2916
2917         sprintf(dbf_text,"qehi%4x",cdev->private->schid.sch_no);
2918         QDIO_DBF_TEXT0(0,setup,dbf_text);
2919         QDIO_DBF_TEXT0(0,trace,dbf_text);
2920
2921         if (qdio_establish_irq_check_for_errors(cdev, cstat, dstat)) {
2922                 ccw_device_set_timeout(cdev, 0);
2923                 return;
2924         }
2925
2926         qdio_set_state(irq_ptr,QDIO_IRQ_STATE_ESTABLISHED);
2927         ccw_device_set_timeout(cdev, 0);
2928 }
2929
2930 int
2931 qdio_initialize(struct qdio_initialize *init_data)
2932 {
2933         int rc;
2934         char dbf_text[15];
2935
2936         sprintf(dbf_text,"qini%4x",init_data->cdev->private->schid.sch_no);
2937         QDIO_DBF_TEXT0(0,setup,dbf_text);
2938         QDIO_DBF_TEXT0(0,trace,dbf_text);
2939
2940         rc = qdio_allocate(init_data);
2941         if (rc == 0) {
2942                 rc = qdio_establish(init_data);
2943                 if (rc != 0)
2944                         qdio_free(init_data->cdev);
2945         }
2946
2947         return rc;
2948 }
2949
2950
2951 int
2952 qdio_allocate(struct qdio_initialize *init_data)
2953 {
2954         struct qdio_irq *irq_ptr;
2955         char dbf_text[15];
2956
2957         sprintf(dbf_text,"qalc%4x",init_data->cdev->private->schid.sch_no);
2958         QDIO_DBF_TEXT0(0,setup,dbf_text);
2959         QDIO_DBF_TEXT0(0,trace,dbf_text);
2960         if ( (init_data->no_input_qs>QDIO_MAX_QUEUES_PER_IRQ) ||
2961              (init_data->no_output_qs>QDIO_MAX_QUEUES_PER_IRQ) ||
2962              ((init_data->no_input_qs) && (!init_data->input_handler)) ||
2963              ((init_data->no_output_qs) && (!init_data->output_handler)) )
2964                 return -EINVAL;
2965
2966         if (!init_data->input_sbal_addr_array)
2967                 return -EINVAL;
2968
2969         if (!init_data->output_sbal_addr_array)
2970                 return -EINVAL;
2971
2972         qdio_allocate_do_dbf(init_data);
2973
2974         /* create irq */
2975         irq_ptr = (void *) get_zeroed_page(GFP_KERNEL | GFP_DMA);
2976
2977         QDIO_DBF_TEXT0(0,setup,"irq_ptr:");
2978         QDIO_DBF_HEX0(0,setup,&irq_ptr,sizeof(void*));
2979
2980         if (!irq_ptr) {
2981                 QDIO_PRINT_ERR("allocation of irq_ptr failed!\n");
2982                 return -ENOMEM;
2983         }
2984
2985         init_MUTEX(&irq_ptr->setting_up_sema);
2986
2987         /* QDR must be in DMA area since CCW data address is only 32 bit */
2988         irq_ptr->qdr = (struct qdr *) __get_free_page(GFP_KERNEL | GFP_DMA);
2989         if (!(irq_ptr->qdr)) {
2990                 free_page((unsigned long) irq_ptr);
2991                 QDIO_PRINT_ERR("allocation of irq_ptr->qdr failed!\n");
2992                 return -ENOMEM;
2993         }
2994         QDIO_DBF_TEXT0(0,setup,"qdr:");
2995         QDIO_DBF_HEX0(0,setup,&irq_ptr->qdr,sizeof(void*));
2996
2997         if (qdio_alloc_qs(irq_ptr,
2998                           init_data->no_input_qs,
2999                           init_data->no_output_qs)) {
3000                 QDIO_PRINT_ERR("queue allocation failed!\n");
3001                 qdio_release_irq_memory(irq_ptr);
3002                 return -ENOMEM;
3003         }
3004
3005         init_data->cdev->private->qdio_data = irq_ptr;
3006
3007         qdio_set_state(irq_ptr,QDIO_IRQ_STATE_INACTIVE);
3008
3009         return 0;
3010 }
3011
3012 static int qdio_fill_irq(struct qdio_initialize *init_data)
3013 {
3014         int i;
3015         char dbf_text[15];
3016         struct ciw *ciw;
3017         int is_iqdio;
3018         struct qdio_irq *irq_ptr;
3019
3020         irq_ptr = init_data->cdev->private->qdio_data;
3021
3022         memset(irq_ptr,0,((char*)&irq_ptr->qdr)-((char*)irq_ptr));
3023
3024         /* wipes qib.ac, required by ar7063 */
3025         memset(irq_ptr->qdr,0,sizeof(struct qdr));
3026
3027         irq_ptr->int_parm=init_data->int_parm;
3028
3029         irq_ptr->schid = ccw_device_get_subchannel_id(init_data->cdev);
3030         irq_ptr->no_input_qs=init_data->no_input_qs;
3031         irq_ptr->no_output_qs=init_data->no_output_qs;
3032
3033         if (init_data->q_format==QDIO_IQDIO_QFMT) {
3034                 irq_ptr->is_iqdio_irq=1;
3035                 irq_ptr->is_thinint_irq=1;
3036         } else {
3037                 irq_ptr->is_iqdio_irq=0;
3038                 irq_ptr->is_thinint_irq=hydra_thinints;
3039         }
3040         sprintf(dbf_text,"is_i_t%1x%1x",
3041                 irq_ptr->is_iqdio_irq,irq_ptr->is_thinint_irq);
3042         QDIO_DBF_TEXT2(0,setup,dbf_text);
3043
3044         if (irq_ptr->is_thinint_irq) {
3045                 irq_ptr->dev_st_chg_ind = qdio_get_indicator();
3046                 QDIO_DBF_HEX1(0,setup,&irq_ptr->dev_st_chg_ind,sizeof(void*));
3047                 if (!irq_ptr->dev_st_chg_ind) {
3048                         QDIO_PRINT_WARN("no indicator location available " \
3049                                         "for irq 0.%x.%x\n",
3050                                         irq_ptr->schid.ssid, irq_ptr->schid.sch_no);
3051                         qdio_release_irq_memory(irq_ptr);
3052                         return -ENOBUFS;
3053                 }
3054         }
3055
3056         /* defaults */
3057         irq_ptr->equeue.cmd=DEFAULT_ESTABLISH_QS_CMD;
3058         irq_ptr->equeue.count=DEFAULT_ESTABLISH_QS_COUNT;
3059         irq_ptr->aqueue.cmd=DEFAULT_ACTIVATE_QS_CMD;
3060         irq_ptr->aqueue.count=DEFAULT_ACTIVATE_QS_COUNT;
3061
3062         qdio_fill_qs(irq_ptr, init_data->cdev,
3063                      init_data->no_input_qs,
3064                      init_data->no_output_qs,
3065                      init_data->input_handler,
3066                      init_data->output_handler,init_data->int_parm,
3067                      init_data->q_format,init_data->flags,
3068                      init_data->input_sbal_addr_array,
3069                      init_data->output_sbal_addr_array);
3070
3071         if (!try_module_get(THIS_MODULE)) {
3072                 QDIO_PRINT_CRIT("try_module_get() failed!\n");
3073                 qdio_release_irq_memory(irq_ptr);
3074                 return -EINVAL;
3075         }
3076
3077         qdio_fill_thresholds(irq_ptr,init_data->no_input_qs,
3078                              init_data->no_output_qs,
3079                              init_data->min_input_threshold,
3080                              init_data->max_input_threshold,
3081                              init_data->min_output_threshold,
3082                              init_data->max_output_threshold);
3083
3084         /* fill in qdr */
3085         irq_ptr->qdr->qfmt=init_data->q_format;
3086         irq_ptr->qdr->iqdcnt=init_data->no_input_qs;
3087         irq_ptr->qdr->oqdcnt=init_data->no_output_qs;
3088         irq_ptr->qdr->iqdsz=sizeof(struct qdesfmt0)/4; /* size in words */
3089         irq_ptr->qdr->oqdsz=sizeof(struct qdesfmt0)/4;
3090
3091         irq_ptr->qdr->qiba=(unsigned long)&irq_ptr->qib;
3092         irq_ptr->qdr->qkey=QDIO_STORAGE_KEY;
3093
3094         /* fill in qib */
3095         irq_ptr->is_qebsm = is_passthrough;
3096         if (irq_ptr->is_qebsm)
3097                 irq_ptr->qib.rflags |= QIB_RFLAGS_ENABLE_QEBSM;
3098
3099         irq_ptr->qib.qfmt=init_data->q_format;
3100         if (init_data->no_input_qs)
3101                 irq_ptr->qib.isliba=(unsigned long)(irq_ptr->input_qs[0]->slib);
3102         if (init_data->no_output_qs)
3103                 irq_ptr->qib.osliba=(unsigned long)(irq_ptr->output_qs[0]->slib);
3104         memcpy(irq_ptr->qib.ebcnam,init_data->adapter_name,8);
3105
3106         qdio_set_impl_params(irq_ptr,init_data->qib_param_field_format,
3107                              init_data->qib_param_field,
3108                              init_data->no_input_qs,
3109                              init_data->no_output_qs,
3110                              init_data->input_slib_elements,
3111                              init_data->output_slib_elements);
3112
3113         /* first input descriptors, then output descriptors */
3114         is_iqdio = (init_data->q_format == QDIO_IQDIO_QFMT) ? 1 : 0;
3115         for (i=0;i<init_data->no_input_qs;i++)
3116                 qdio_allocate_fill_input_desc(irq_ptr, i, is_iqdio);
3117
3118         for (i=0;i<init_data->no_output_qs;i++)
3119                 qdio_allocate_fill_output_desc(irq_ptr, i,
3120                                                init_data->no_input_qs,
3121                                                is_iqdio);
3122
3123         /* qdr, qib, sls, slsbs, slibs, sbales filled. */
3124
3125         /* get qdio commands */
3126         ciw = ccw_device_get_ciw(init_data->cdev, CIW_TYPE_EQUEUE);
3127         if (!ciw) {
3128                 QDIO_DBF_TEXT2(1,setup,"no eq");
3129                 QDIO_PRINT_INFO("No equeue CIW found for QDIO commands. "
3130                                 "Trying to use default.\n");
3131         } else
3132                 irq_ptr->equeue = *ciw;
3133         ciw = ccw_device_get_ciw(init_data->cdev, CIW_TYPE_AQUEUE);
3134         if (!ciw) {
3135                 QDIO_DBF_TEXT2(1,setup,"no aq");
3136                 QDIO_PRINT_INFO("No aqueue CIW found for QDIO commands. "
3137                                 "Trying to use default.\n");
3138         } else
3139                 irq_ptr->aqueue = *ciw;
3140
3141         /* Set new interrupt handler. */
3142         irq_ptr->original_int_handler = init_data->cdev->handler;
3143         init_data->cdev->handler = qdio_handler;
3144
3145         return 0;
3146 }
3147
3148 int
3149 qdio_establish(struct qdio_initialize *init_data)
3150 {
3151         struct qdio_irq *irq_ptr;
3152         unsigned long saveflags;
3153         int result, result2;
3154         struct ccw_device *cdev;
3155         char dbf_text[20];
3156
3157         cdev=init_data->cdev;
3158         irq_ptr = cdev->private->qdio_data;
3159         if (!irq_ptr)
3160                 return -EINVAL;
3161
3162         if (cdev->private->state != DEV_STATE_ONLINE)
3163                 return -EINVAL;
3164
3165         down(&irq_ptr->setting_up_sema);
3166
3167         qdio_fill_irq(init_data);
3168
3169         /* the thinint CHSC stuff */
3170         if (irq_ptr->is_thinint_irq) {
3171
3172                 result = tiqdio_set_subchannel_ind(irq_ptr,0);
3173                 if (result) {
3174                         up(&irq_ptr->setting_up_sema);
3175                         qdio_shutdown(cdev, QDIO_FLAG_CLEANUP_USING_CLEAR);
3176                         return result;
3177                 }
3178                 tiqdio_set_delay_target(irq_ptr,TIQDIO_DELAY_TARGET);
3179         }
3180
3181         sprintf(dbf_text,"qest%4x",cdev->private->schid.sch_no);
3182         QDIO_DBF_TEXT0(0,setup,dbf_text);
3183         QDIO_DBF_TEXT0(0,trace,dbf_text);
3184
3185         /* establish q */
3186         irq_ptr->ccw.cmd_code=irq_ptr->equeue.cmd;
3187         irq_ptr->ccw.flags=CCW_FLAG_SLI;
3188         irq_ptr->ccw.count=irq_ptr->equeue.count;
3189         irq_ptr->ccw.cda=QDIO_GET_ADDR(irq_ptr->qdr);
3190
3191         spin_lock_irqsave(get_ccwdev_lock(cdev),saveflags);
3192
3193         ccw_device_set_options_mask(cdev, 0);
3194         result=ccw_device_start_timeout(cdev,&irq_ptr->ccw,
3195                                         QDIO_DOING_ESTABLISH,0, 0,
3196                                         QDIO_ESTABLISH_TIMEOUT);
3197         if (result) {
3198                 result2=ccw_device_start_timeout(cdev,&irq_ptr->ccw,
3199                                                  QDIO_DOING_ESTABLISH,0,0,
3200                                                  QDIO_ESTABLISH_TIMEOUT);
3201                 sprintf(dbf_text,"eq:io%4x",result);
3202                 QDIO_DBF_TEXT2(1,setup,dbf_text);
3203                 if (result2) {
3204                         sprintf(dbf_text,"eq:io%4x",result);
3205                         QDIO_DBF_TEXT2(1,setup,dbf_text);
3206                 }
3207                 QDIO_PRINT_WARN("establish queues on irq 0.%x.%04x: do_IO " \
3208                                 "returned %i, next try returned %i\n",
3209                                 irq_ptr->schid.ssid, irq_ptr->schid.sch_no,
3210                                 result, result2);
3211                 result=result2;
3212                 if (result)
3213                         ccw_device_set_timeout(cdev, 0);
3214         }
3215
3216         spin_unlock_irqrestore(get_ccwdev_lock(cdev),saveflags);
3217
3218         if (result) {
3219                 up(&irq_ptr->setting_up_sema);
3220                 qdio_shutdown(cdev,QDIO_FLAG_CLEANUP_USING_CLEAR);
3221                 return result;
3222         }
3223
3224         /* Timeout is cared for already by using ccw_device_start_timeout(). */
3225         wait_event_interruptible(cdev->private->wait_q,
3226                  irq_ptr->state == QDIO_IRQ_STATE_ESTABLISHED ||
3227                  irq_ptr->state == QDIO_IRQ_STATE_ERR);
3228
3229         if (irq_ptr->state == QDIO_IRQ_STATE_ESTABLISHED)
3230                 result = 0;
3231         else {
3232                 up(&irq_ptr->setting_up_sema);
3233                 qdio_shutdown(cdev, QDIO_FLAG_CLEANUP_USING_CLEAR);
3234                 return -EIO;
3235         }
3236
3237         qdio_get_ssqd_information(irq_ptr);
3238         /* if this gets set once, we're running under VM and can omit SVSes */
3239         if (irq_ptr->qdioac&CHSC_FLAG_SIGA_SYNC_NECESSARY)
3240                 omit_svs=1;
3241
3242         sprintf(dbf_text,"qdioac%2x",irq_ptr->qdioac);
3243         QDIO_DBF_TEXT2(0,setup,dbf_text);
3244
3245         sprintf(dbf_text,"qib ac%2x",irq_ptr->qib.ac);
3246         QDIO_DBF_TEXT2(0,setup,dbf_text);
3247
3248         irq_ptr->hydra_gives_outbound_pcis=
3249                 irq_ptr->qib.ac&QIB_AC_OUTBOUND_PCI_SUPPORTED;
3250         irq_ptr->sync_done_on_outb_pcis=
3251                 irq_ptr->qdioac&CHSC_FLAG_SIGA_SYNC_DONE_ON_OUTB_PCIS;
3252
3253         qdio_initialize_set_siga_flags_input(irq_ptr);
3254         qdio_initialize_set_siga_flags_output(irq_ptr);
3255
3256         up(&irq_ptr->setting_up_sema);
3257
3258         return result;
3259
3260 }
3261
3262 int
3263 qdio_activate(struct ccw_device *cdev, int flags)
3264 {
3265         struct qdio_irq *irq_ptr;
3266         int i,result=0,result2;
3267         unsigned long saveflags;
3268         char dbf_text[20]; /* see qdio_initialize */
3269
3270         irq_ptr = cdev->private->qdio_data;
3271         if (!irq_ptr)
3272                 return -ENODEV;
3273
3274         if (cdev->private->state != DEV_STATE_ONLINE)
3275                 return -EINVAL;
3276
3277         down(&irq_ptr->setting_up_sema);
3278         if (irq_ptr->state==QDIO_IRQ_STATE_INACTIVE) {
3279                 result=-EBUSY;
3280                 goto out;
3281         }
3282
3283         sprintf(dbf_text,"qact%4x", irq_ptr->schid.sch_no);
3284         QDIO_DBF_TEXT2(0,setup,dbf_text);
3285         QDIO_DBF_TEXT2(0,trace,dbf_text);
3286
3287         /* activate q */
3288         irq_ptr->ccw.cmd_code=irq_ptr->aqueue.cmd;
3289         irq_ptr->ccw.flags=CCW_FLAG_SLI;
3290         irq_ptr->ccw.count=irq_ptr->aqueue.count;
3291         irq_ptr->ccw.cda=QDIO_GET_ADDR(0);
3292
3293         spin_lock_irqsave(get_ccwdev_lock(cdev),saveflags);
3294
3295         ccw_device_set_timeout(cdev, 0);
3296         ccw_device_set_options(cdev, CCWDEV_REPORT_ALL);
3297         result=ccw_device_start(cdev,&irq_ptr->ccw,QDIO_DOING_ACTIVATE,
3298                                 0, DOIO_DENY_PREFETCH);
3299         if (result) {
3300                 result2=ccw_device_start(cdev,&irq_ptr->ccw,
3301                                          QDIO_DOING_ACTIVATE,0,0);
3302                 sprintf(dbf_text,"aq:io%4x",result);
3303                 QDIO_DBF_TEXT2(1,setup,dbf_text);
3304                 if (result2) {
3305                         sprintf(dbf_text,"aq:io%4x",result);
3306                         QDIO_DBF_TEXT2(1,setup,dbf_text);
3307                 }
3308                 QDIO_PRINT_WARN("activate queues on irq 0.%x.%04x: do_IO " \
3309                                 "returned %i, next try returned %i\n",
3310                                 irq_ptr->schid.ssid, irq_ptr->schid.sch_no,
3311                                 result, result2);
3312                 result=result2;
3313         }
3314
3315         spin_unlock_irqrestore(get_ccwdev_lock(cdev),saveflags);
3316         if (result)
3317                 goto out;
3318
3319         for (i=0;i<irq_ptr->no_input_qs;i++) {
3320                 if (irq_ptr->is_thinint_irq) {
3321                         /*
3322                          * that way we know, that, if we will get interrupted
3323                          * by tiqdio_inbound_processing, qdio_unmark_q will
3324                          * not be called
3325                          */
3326                         qdio_reserve_q(irq_ptr->input_qs[i]);
3327                         qdio_mark_tiq(irq_ptr->input_qs[i]);
3328                         qdio_release_q(irq_ptr->input_qs[i]);
3329                 }
3330         }
3331
3332         if (flags&QDIO_FLAG_NO_INPUT_INTERRUPT_CONTEXT) {
3333                 for (i=0;i<irq_ptr->no_input_qs;i++) {
3334                         irq_ptr->input_qs[i]->is_input_q|=
3335                                 QDIO_FLAG_NO_INPUT_INTERRUPT_CONTEXT;
3336                 }
3337         }
3338
3339         wait_event_interruptible_timeout(cdev->private->wait_q,
3340                                          ((irq_ptr->state ==
3341                                           QDIO_IRQ_STATE_STOPPED) ||
3342                                           (irq_ptr->state ==
3343                                            QDIO_IRQ_STATE_ERR)),
3344                                          QDIO_ACTIVATE_TIMEOUT);
3345
3346         switch (irq_ptr->state) {
3347         case QDIO_IRQ_STATE_STOPPED:
3348         case QDIO_IRQ_STATE_ERR:
3349                 up(&irq_ptr->setting_up_sema);
3350                 qdio_shutdown(cdev, QDIO_FLAG_CLEANUP_USING_CLEAR);
3351                 down(&irq_ptr->setting_up_sema);
3352                 result = -EIO;
3353                 break;
3354         default:
3355                 qdio_set_state(irq_ptr, QDIO_IRQ_STATE_ACTIVE);
3356                 result = 0;
3357         }
3358  out:
3359         up(&irq_ptr->setting_up_sema);
3360
3361         return result;
3362 }
3363
3364 /* buffers filled forwards again to make Rick happy */
3365 static void
3366 qdio_do_qdio_fill_input(struct qdio_q *q, unsigned int qidx,
3367                         unsigned int count, struct qdio_buffer *buffers)
3368 {
3369         struct qdio_irq *irq = (struct qdio_irq *) q->irq_ptr;
3370         int tmp = 0;
3371
3372         qidx &= (QDIO_MAX_BUFFERS_PER_Q - 1);
3373         if (irq->is_qebsm) {
3374                 while (count) {
3375                         tmp = set_slsb(q, &qidx, SLSB_CU_INPUT_EMPTY, &count);
3376                         if (!tmp)
3377                                 return;
3378                 }
3379                 return;
3380         }
3381         for (;;) {
3382                 set_slsb(q, &qidx, SLSB_CU_INPUT_EMPTY, &count);
3383                 count--;
3384                 if (!count) break;
3385                 qidx = (qidx + 1) & (QDIO_MAX_BUFFERS_PER_Q - 1);
3386         }
3387 }
3388
3389 static void
3390 qdio_do_qdio_fill_output(struct qdio_q *q, unsigned int qidx,
3391                          unsigned int count, struct qdio_buffer *buffers)
3392 {
3393         struct qdio_irq *irq = (struct qdio_irq *) q->irq_ptr;
3394         int tmp = 0;
3395
3396         qidx &= (QDIO_MAX_BUFFERS_PER_Q - 1);
3397         if (irq->is_qebsm) {
3398                 while (count) {
3399                         tmp = set_slsb(q, &qidx, SLSB_CU_OUTPUT_PRIMED, &count);
3400                         if (!tmp)
3401                                 return;
3402                 }
3403                 return;
3404         }
3405
3406         for (;;) {
3407                 set_slsb(q, &qidx, SLSB_CU_OUTPUT_PRIMED, &count);
3408                 count--;
3409                 if (!count) break;
3410                 qidx = (qidx + 1) & (QDIO_MAX_BUFFERS_PER_Q - 1);
3411         }
3412 }
3413
3414 static void
3415 do_qdio_handle_inbound(struct qdio_q *q, unsigned int callflags,
3416                        unsigned int qidx, unsigned int count,
3417                        struct qdio_buffer *buffers)
3418 {
3419         int used_elements;
3420
3421         /* This is the inbound handling of queues */
3422         used_elements=atomic_add_return(count, &q->number_of_buffers_used) - count;
3423
3424         qdio_do_qdio_fill_input(q,qidx,count,buffers);
3425
3426         if ((used_elements+count==QDIO_MAX_BUFFERS_PER_Q)&&
3427             (callflags&QDIO_FLAG_UNDER_INTERRUPT))
3428                 atomic_xchg(&q->polling,0);
3429
3430         if (used_elements)
3431                 return;
3432         if (callflags&QDIO_FLAG_DONT_SIGA)
3433                 return;
3434         if (q->siga_in) {
3435                 int result;
3436
3437                 result=qdio_siga_input(q);
3438                 if (result) {
3439                         if (q->siga_error)
3440                                 q->error_status_flags|=
3441                                         QDIO_STATUS_MORE_THAN_ONE_SIGA_ERROR;
3442                         q->error_status_flags|=QDIO_STATUS_LOOK_FOR_ERROR;
3443                         q->siga_error=result;
3444                 }
3445         }
3446
3447         qdio_mark_q(q);
3448 }
3449
3450 static void
3451 do_qdio_handle_outbound(struct qdio_q *q, unsigned int callflags,
3452                         unsigned int qidx, unsigned int count,
3453                         struct qdio_buffer *buffers)
3454 {
3455         int used_elements;
3456         unsigned int cnt, start_buf;
3457         unsigned char state = 0;
3458         struct qdio_irq *irq = (struct qdio_irq *) q->irq_ptr;
3459
3460         /* This is the outbound handling of queues */
3461         qdio_do_qdio_fill_output(q,qidx,count,buffers);
3462
3463         used_elements=atomic_add_return(count, &q->number_of_buffers_used) - count;
3464
3465         if (callflags&QDIO_FLAG_DONT_SIGA) {
3466                 qdio_perf_stat_inc(&perf_stats.outbound_cnt);
3467                 return;
3468         }
3469         if (callflags & QDIO_FLAG_PCI_OUT)
3470                 q->is_pci_out = 1;
3471         else
3472                 q->is_pci_out = 0;
3473         if (q->is_iqdio_q) {
3474                 /* one siga for every sbal */
3475                 while (count--)
3476                         qdio_kick_outbound_q(q);
3477
3478                 __qdio_outbound_processing(q);
3479         } else {
3480                 /* under VM, we do a SIGA sync unconditionally */
3481                 SYNC_MEMORY;
3482                 else {
3483                         /*
3484                          * w/o shadow queues (else branch of
3485                          * SYNC_MEMORY :-/ ), we try to
3486                          * fast-requeue buffers
3487                          */
3488                         if (irq->is_qebsm) {
3489                                 cnt = 1;
3490                                 start_buf = ((qidx+QDIO_MAX_BUFFERS_PER_Q-1) &
3491                                              (QDIO_MAX_BUFFERS_PER_Q-1));
3492                                 qdio_do_eqbs(q, &state, &start_buf, &cnt);
3493                         } else
3494                                 state = q->slsb.acc.val[(qidx+QDIO_MAX_BUFFERS_PER_Q-1)
3495                                         &(QDIO_MAX_BUFFERS_PER_Q-1) ];
3496                          if (state != SLSB_CU_OUTPUT_PRIMED) {
3497                                 qdio_kick_outbound_q(q);
3498                         } else {
3499                                 QDIO_DBF_TEXT3(0,trace, "fast-req");
3500                                 qdio_perf_stat_inc(&perf_stats.fast_reqs);
3501                         }
3502                 }
3503                 /*
3504                  * only marking the q could take too long,
3505                  * the upper layer module could do a lot of
3506                  * traffic in that time
3507                  */
3508                 __qdio_outbound_processing(q);
3509         }
3510
3511         qdio_perf_stat_inc(&perf_stats.outbound_cnt);
3512 }
3513
3514 /* count must be 1 in iqdio */
3515 int
3516 do_QDIO(struct ccw_device *cdev,unsigned int callflags,
3517         unsigned int queue_number, unsigned int qidx,
3518         unsigned int count,struct qdio_buffer *buffers)
3519 {
3520         struct qdio_irq *irq_ptr;
3521 #ifdef CONFIG_QDIO_DEBUG
3522         char dbf_text[20];
3523
3524         sprintf(dbf_text,"doQD%04x",cdev->private->schid.sch_no);
3525         QDIO_DBF_TEXT3(0,trace,dbf_text);
3526 #endif /* CONFIG_QDIO_DEBUG */
3527
3528         if ( (qidx>QDIO_MAX_BUFFERS_PER_Q) ||
3529              (count>QDIO_MAX_BUFFERS_PER_Q) ||
3530              (queue_number>QDIO_MAX_QUEUES_PER_IRQ) )
3531                 return -EINVAL;
3532
3533         if (count==0)
3534                 return 0;
3535
3536         irq_ptr = cdev->private->qdio_data;
3537         if (!irq_ptr)
3538                 return -ENODEV;
3539
3540 #ifdef CONFIG_QDIO_DEBUG
3541         if (callflags&QDIO_FLAG_SYNC_INPUT)
3542                 QDIO_DBF_HEX3(0,trace,&irq_ptr->input_qs[queue_number],
3543                               sizeof(void*));
3544         else
3545                 QDIO_DBF_HEX3(0,trace,&irq_ptr->output_qs[queue_number],
3546                               sizeof(void*));
3547         sprintf(dbf_text,"flag%04x",callflags);
3548         QDIO_DBF_TEXT3(0,trace,dbf_text);
3549         sprintf(dbf_text,"qi%02xct%02x",qidx,count);
3550         QDIO_DBF_TEXT3(0,trace,dbf_text);
3551 #endif /* CONFIG_QDIO_DEBUG */
3552
3553         if (irq_ptr->state!=QDIO_IRQ_STATE_ACTIVE)
3554                 return -EBUSY;
3555
3556         if (callflags&QDIO_FLAG_SYNC_INPUT)
3557                 do_qdio_handle_inbound(irq_ptr->input_qs[queue_number],
3558                                        callflags, qidx, count, buffers);
3559         else if (callflags&QDIO_FLAG_SYNC_OUTPUT)
3560                 do_qdio_handle_outbound(irq_ptr->output_qs[queue_number],
3561                                         callflags, qidx, count, buffers);
3562         else {
3563                 QDIO_DBF_TEXT3(1,trace,"doQD:inv");
3564                 return -EINVAL;
3565         }
3566         return 0;
3567 }
3568
3569 static int
3570 qdio_perf_procfile_read(char *buffer, char **buffer_location, off_t offset,
3571                         int buffer_length, int *eof, void *data)
3572 {
3573         int c=0;
3574
3575         /* we are always called with buffer_length=4k, so we all
3576            deliver on the first read */
3577         if (offset>0)
3578                 return 0;
3579
3580 #define _OUTP_IT(x...) c+=sprintf(buffer+c,x)
3581 #ifdef CONFIG_64BIT
3582         _OUTP_IT("Number of tasklet runs (total)                  : %li\n",
3583                  (long)atomic64_read(&perf_stats.tl_runs));
3584         _OUTP_IT("Inbound tasklet runs      tried/retried         : %li/%li\n",
3585                  (long)atomic64_read(&perf_stats.inbound_tl_runs),
3586                  (long)atomic64_read(&perf_stats.inbound_tl_runs_resched));
3587         _OUTP_IT("Inbound-thin tasklet runs tried/retried         : %li/%li\n",
3588                  (long)atomic64_read(&perf_stats.inbound_thin_tl_runs),
3589                  (long)atomic64_read(&perf_stats.inbound_thin_tl_runs_resched));
3590         _OUTP_IT("Outbound tasklet runs     tried/retried         : %li/%li\n",
3591                  (long)atomic64_read(&perf_stats.outbound_tl_runs),
3592                  (long)atomic64_read(&perf_stats.outbound_tl_runs_resched));
3593         _OUTP_IT("\n");
3594         _OUTP_IT("Number of SIGA sync's issued                    : %li\n",
3595                  (long)atomic64_read(&perf_stats.siga_syncs));
3596         _OUTP_IT("Number of SIGA in's issued                      : %li\n",
3597                  (long)atomic64_read(&perf_stats.siga_ins));
3598         _OUTP_IT("Number of SIGA out's issued                     : %li\n",
3599                  (long)atomic64_read(&perf_stats.siga_outs));
3600         _OUTP_IT("Number of PCIs caught                           : %li\n",
3601                  (long)atomic64_read(&perf_stats.pcis));
3602         _OUTP_IT("Number of adapter interrupts caught             : %li\n",
3603                  (long)atomic64_read(&perf_stats.thinints));
3604         _OUTP_IT("Number of fast requeues (outg. SBALs w/o SIGA)  : %li\n",
3605                  (long)atomic64_read(&perf_stats.fast_reqs));
3606         _OUTP_IT("\n");
3607         _OUTP_IT("Number of inbound transfers                     : %li\n",
3608                  (long)atomic64_read(&perf_stats.inbound_cnt));
3609         _OUTP_IT("Number of do_QDIOs outbound                     : %li\n",
3610                  (long)atomic64_read(&perf_stats.outbound_cnt));
3611 #else /* CONFIG_64BIT */
3612         _OUTP_IT("Number of tasklet runs (total)                  : %i\n",
3613                  atomic_read(&perf_stats.tl_runs));
3614         _OUTP_IT("Inbound tasklet runs      tried/retried         : %i/%i\n",
3615                  atomic_read(&perf_stats.inbound_tl_runs),
3616                  atomic_read(&perf_stats.inbound_tl_runs_resched));
3617         _OUTP_IT("Inbound-thin tasklet runs tried/retried         : %i/%i\n",
3618                  atomic_read(&perf_stats.inbound_thin_tl_runs),
3619                  atomic_read(&perf_stats.inbound_thin_tl_runs_resched));
3620         _OUTP_IT("Outbound tasklet runs     tried/retried         : %i/%i\n",
3621                  atomic_read(&perf_stats.outbound_tl_runs),
3622                  atomic_read(&perf_stats.outbound_tl_runs_resched));
3623         _OUTP_IT("\n");
3624         _OUTP_IT("Number of SIGA sync's issued                    : %i\n",
3625                  atomic_read(&perf_stats.siga_syncs));
3626         _OUTP_IT("Number of SIGA in's issued                      : %i\n",
3627                  atomic_read(&perf_stats.siga_ins));
3628         _OUTP_IT("Number of SIGA out's issued                     : %i\n",
3629                  atomic_read(&perf_stats.siga_outs));
3630         _OUTP_IT("Number of PCIs caught                           : %i\n",
3631                  atomic_read(&perf_stats.pcis));
3632         _OUTP_IT("Number of adapter interrupts caught             : %i\n",
3633                  atomic_read(&perf_stats.thinints));
3634         _OUTP_IT("Number of fast requeues (outg. SBALs w/o SIGA)  : %i\n",
3635                  atomic_read(&perf_stats.fast_reqs));
3636         _OUTP_IT("\n");
3637         _OUTP_IT("Number of inbound transfers                     : %i\n",
3638                  atomic_read(&perf_stats.inbound_cnt));
3639         _OUTP_IT("Number of do_QDIOs outbound                     : %i\n",
3640                  atomic_read(&perf_stats.outbound_cnt));
3641 #endif /* CONFIG_64BIT */
3642         _OUTP_IT("\n");
3643
3644         return c;
3645 }
3646
3647 static struct proc_dir_entry *qdio_perf_proc_file;
3648
3649 static void
3650 qdio_add_procfs_entry(void)
3651 {
3652         proc_perf_file_registration=0;
3653         qdio_perf_proc_file=create_proc_entry(QDIO_PERF,
3654                                               S_IFREG|0444,&proc_root);
3655         if (qdio_perf_proc_file) {
3656                 qdio_perf_proc_file->read_proc=&qdio_perf_procfile_read;
3657         } else proc_perf_file_registration=-1;
3658
3659         if (proc_perf_file_registration)
3660                 QDIO_PRINT_WARN("was not able to register perf. " \
3661                                 "proc-file (%i).\n",
3662                                 proc_perf_file_registration);
3663 }
3664
3665 static void
3666 qdio_remove_procfs_entry(void)
3667 {
3668         if (!proc_perf_file_registration) /* means if it went ok earlier */
3669                 remove_proc_entry(QDIO_PERF,&proc_root);
3670 }
3671
3672 /**
3673  * attributes in sysfs
3674  *****************************************************************************/
3675
3676 static ssize_t
3677 qdio_performance_stats_show(struct bus_type *bus, char *buf)
3678 {
3679         return sprintf(buf, "%i\n", qdio_performance_stats ? 1 : 0);
3680 }
3681
3682 static ssize_t
3683 qdio_performance_stats_store(struct bus_type *bus, const char *buf, size_t count)
3684 {
3685         char *tmp;
3686         int i;
3687
3688         i = simple_strtoul(buf, &tmp, 16);
3689         if ((i == 0) || (i == 1)) {
3690                 if (i == qdio_performance_stats)
3691                         return count;
3692                 qdio_performance_stats = i;
3693                 if (i==0) {
3694                         /* reset perf. stat. info */
3695 #ifdef CONFIG_64BIT
3696                         atomic64_set(&perf_stats.tl_runs, 0);
3697                         atomic64_set(&perf_stats.outbound_tl_runs, 0);
3698                         atomic64_set(&perf_stats.inbound_tl_runs, 0);
3699                         atomic64_set(&perf_stats.inbound_tl_runs_resched, 0);
3700                         atomic64_set(&perf_stats.inbound_thin_tl_runs, 0);
3701                         atomic64_set(&perf_stats.inbound_thin_tl_runs_resched,
3702                                      0);
3703                         atomic64_set(&perf_stats.siga_outs, 0);
3704                         atomic64_set(&perf_stats.siga_ins, 0);
3705                         atomic64_set(&perf_stats.siga_syncs, 0);
3706                         atomic64_set(&perf_stats.pcis, 0);
3707                         atomic64_set(&perf_stats.thinints, 0);
3708                         atomic64_set(&perf_stats.fast_reqs, 0);
3709                         atomic64_set(&perf_stats.outbound_cnt, 0);
3710                         atomic64_set(&perf_stats.inbound_cnt, 0);
3711 #else /* CONFIG_64BIT */
3712                         atomic_set(&perf_stats.tl_runs, 0);
3713                         atomic_set(&perf_stats.outbound_tl_runs, 0);
3714                         atomic_set(&perf_stats.inbound_tl_runs, 0);
3715                         atomic_set(&perf_stats.inbound_tl_runs_resched, 0);
3716                         atomic_set(&perf_stats.inbound_thin_tl_runs, 0);
3717                         atomic_set(&perf_stats.inbound_thin_tl_runs_resched, 0);
3718                         atomic_set(&perf_stats.siga_outs, 0);
3719                         atomic_set(&perf_stats.siga_ins, 0);
3720                         atomic_set(&perf_stats.siga_syncs, 0);
3721                         atomic_set(&perf_stats.pcis, 0);
3722                         atomic_set(&perf_stats.thinints, 0);
3723                         atomic_set(&perf_stats.fast_reqs, 0);
3724                         atomic_set(&perf_stats.outbound_cnt, 0);
3725                         atomic_set(&perf_stats.inbound_cnt, 0);
3726 #endif /* CONFIG_64BIT */
3727                 }
3728         } else {
3729                 QDIO_PRINT_WARN("QDIO performance_stats: write 0 or 1 to this file!\n");
3730                 return -EINVAL;
3731         }
3732         return count;
3733 }
3734
3735 static BUS_ATTR(qdio_performance_stats, 0644, qdio_performance_stats_show,
3736                         qdio_performance_stats_store);
3737
3738 static void
3739 tiqdio_register_thinints(void)
3740 {
3741         char dbf_text[20];
3742         register_thinint_result=
3743                 s390_register_adapter_interrupt(&tiqdio_thinint_handler);
3744         if (register_thinint_result) {
3745                 sprintf(dbf_text,"regthn%x",(register_thinint_result&0xff));
3746                 QDIO_DBF_TEXT0(0,setup,dbf_text);
3747                 QDIO_PRINT_ERR("failed to register adapter handler " \
3748                                "(rc=%i).\nAdapter interrupts might " \
3749                                "not work. Continuing.\n",
3750                                register_thinint_result);
3751         }
3752 }
3753
3754 static void
3755 tiqdio_unregister_thinints(void)
3756 {
3757         if (!register_thinint_result)
3758                 s390_unregister_adapter_interrupt(&tiqdio_thinint_handler);
3759 }
3760
3761 static int
3762 qdio_get_qdio_memory(void)
3763 {
3764         int i;
3765         indicator_used[0]=1;
3766
3767         for (i=1;i<INDICATORS_PER_CACHELINE;i++)
3768                 indicator_used[i]=0;
3769         indicators = kzalloc(sizeof(__u32)*(INDICATORS_PER_CACHELINE),
3770                                    GFP_KERNEL);
3771         if (!indicators)
3772                 return -ENOMEM;
3773         return 0;
3774 }
3775
3776 static void
3777 qdio_release_qdio_memory(void)
3778 {
3779         kfree(indicators);
3780 }
3781
3782
3783 static void
3784 qdio_unregister_dbf_views(void)
3785 {
3786         if (qdio_dbf_setup)
3787                 debug_unregister(qdio_dbf_setup);
3788         if (qdio_dbf_sbal)
3789                 debug_unregister(qdio_dbf_sbal);
3790         if (qdio_dbf_sense)
3791                 debug_unregister(qdio_dbf_sense);
3792         if (qdio_dbf_trace)
3793                 debug_unregister(qdio_dbf_trace);
3794 #ifdef CONFIG_QDIO_DEBUG
3795         if (qdio_dbf_slsb_out)
3796                 debug_unregister(qdio_dbf_slsb_out);
3797         if (qdio_dbf_slsb_in)
3798                 debug_unregister(qdio_dbf_slsb_in);
3799 #endif /* CONFIG_QDIO_DEBUG */
3800 }
3801
3802 static int
3803 qdio_register_dbf_views(void)
3804 {
3805         qdio_dbf_setup=debug_register(QDIO_DBF_SETUP_NAME,
3806                                       QDIO_DBF_SETUP_PAGES,
3807                                       QDIO_DBF_SETUP_NR_AREAS,
3808                                       QDIO_DBF_SETUP_LEN);
3809         if (!qdio_dbf_setup)
3810                 goto oom;
3811         debug_register_view(qdio_dbf_setup,&debug_hex_ascii_view);
3812         debug_set_level(qdio_dbf_setup,QDIO_DBF_SETUP_LEVEL);
3813
3814         qdio_dbf_sbal=debug_register(QDIO_DBF_SBAL_NAME,
3815                                      QDIO_DBF_SBAL_PAGES,
3816                                      QDIO_DBF_SBAL_NR_AREAS,
3817                                      QDIO_DBF_SBAL_LEN);
3818         if (!qdio_dbf_sbal)
3819                 goto oom;
3820
3821         debug_register_view(qdio_dbf_sbal,&debug_hex_ascii_view);
3822         debug_set_level(qdio_dbf_sbal,QDIO_DBF_SBAL_LEVEL);
3823
3824         qdio_dbf_sense=debug_register(QDIO_DBF_SENSE_NAME,
3825                                       QDIO_DBF_SENSE_PAGES,
3826                                       QDIO_DBF_SENSE_NR_AREAS,
3827                                       QDIO_DBF_SENSE_LEN);
3828         if (!qdio_dbf_sense)
3829                 goto oom;
3830
3831         debug_register_view(qdio_dbf_sense,&debug_hex_ascii_view);
3832         debug_set_level(qdio_dbf_sense,QDIO_DBF_SENSE_LEVEL);
3833
3834         qdio_dbf_trace=debug_register(QDIO_DBF_TRACE_NAME,
3835                                       QDIO_DBF_TRACE_PAGES,
3836                                       QDIO_DBF_TRACE_NR_AREAS,
3837                                       QDIO_DBF_TRACE_LEN);
3838         if (!qdio_dbf_trace)
3839                 goto oom;
3840
3841         debug_register_view(qdio_dbf_trace,&debug_hex_ascii_view);
3842         debug_set_level(qdio_dbf_trace,QDIO_DBF_TRACE_LEVEL);
3843
3844 #ifdef CONFIG_QDIO_DEBUG
3845         qdio_dbf_slsb_out=debug_register(QDIO_DBF_SLSB_OUT_NAME,
3846                                          QDIO_DBF_SLSB_OUT_PAGES,
3847                                          QDIO_DBF_SLSB_OUT_NR_AREAS,
3848                                          QDIO_DBF_SLSB_OUT_LEN);
3849         if (!qdio_dbf_slsb_out)
3850                 goto oom;
3851         debug_register_view(qdio_dbf_slsb_out,&debug_hex_ascii_view);
3852         debug_set_level(qdio_dbf_slsb_out,QDIO_DBF_SLSB_OUT_LEVEL);
3853
3854         qdio_dbf_slsb_in=debug_register(QDIO_DBF_SLSB_IN_NAME,
3855                                         QDIO_DBF_SLSB_IN_PAGES,
3856                                         QDIO_DBF_SLSB_IN_NR_AREAS,
3857                                         QDIO_DBF_SLSB_IN_LEN);
3858         if (!qdio_dbf_slsb_in)
3859                 goto oom;
3860         debug_register_view(qdio_dbf_slsb_in,&debug_hex_ascii_view);
3861         debug_set_level(qdio_dbf_slsb_in,QDIO_DBF_SLSB_IN_LEVEL);
3862 #endif /* CONFIG_QDIO_DEBUG */
3863         return 0;
3864 oom:
3865         QDIO_PRINT_ERR("not enough memory for dbf.\n");
3866         qdio_unregister_dbf_views();
3867         return -ENOMEM;
3868 }
3869
3870 static void *qdio_mempool_alloc(gfp_t gfp_mask, void *size)
3871 {
3872         return (void *) get_zeroed_page(gfp_mask|GFP_DMA);
3873 }
3874
3875 static void qdio_mempool_free(void *element, void *size)
3876 {
3877         free_page((unsigned long) element);
3878 }
3879
3880 static int __init
3881 init_QDIO(void)
3882 {
3883         int res;
3884         void *ptr;
3885
3886         printk("qdio: loading %s\n",version);
3887
3888         res=qdio_get_qdio_memory();
3889         if (res)
3890                 return res;
3891
3892         qdio_q_cache = kmem_cache_create("qdio_q", sizeof(struct qdio_q),
3893                                          256, 0, NULL);
3894         if (!qdio_q_cache) {
3895                 qdio_release_qdio_memory();
3896                 return -ENOMEM;
3897         }
3898
3899         res = qdio_register_dbf_views();
3900         if (res) {
3901                 kmem_cache_destroy(qdio_q_cache);
3902                 qdio_release_qdio_memory();
3903                 return res;
3904         }
3905
3906         QDIO_DBF_TEXT0(0,setup,"initQDIO");
3907         res = bus_create_file(&ccw_bus_type, &bus_attr_qdio_performance_stats);
3908
3909         memset((void*)&perf_stats,0,sizeof(perf_stats));
3910         QDIO_DBF_TEXT0(0,setup,"perfstat");
3911         ptr=&perf_stats;
3912         QDIO_DBF_HEX0(0,setup,&ptr,sizeof(void*));
3913
3914         qdio_add_procfs_entry();
3915
3916         qdio_mempool_scssc = mempool_create(QDIO_MEMPOOL_SCSSC_ELEMENTS,
3917                                             qdio_mempool_alloc,
3918                                             qdio_mempool_free, NULL);
3919
3920         if (tiqdio_check_chsc_availability())
3921                 QDIO_PRINT_ERR("Not all CHSCs supported. Continuing.\n");
3922
3923         tiqdio_register_thinints();
3924
3925         return 0;
3926  }
3927
3928 static void __exit
3929 cleanup_QDIO(void)
3930 {
3931         tiqdio_unregister_thinints();
3932         qdio_remove_procfs_entry();
3933         qdio_release_qdio_memory();
3934         qdio_unregister_dbf_views();
3935         mempool_destroy(qdio_mempool_scssc);
3936         kmem_cache_destroy(qdio_q_cache);
3937         bus_remove_file(&ccw_bus_type, &bus_attr_qdio_performance_stats);
3938         printk("qdio: %s: module removed\n",version);
3939 }
3940
3941 module_init(init_QDIO);
3942 module_exit(cleanup_QDIO);
3943
3944 EXPORT_SYMBOL(qdio_allocate);
3945 EXPORT_SYMBOL(qdio_establish);
3946 EXPORT_SYMBOL(qdio_initialize);
3947 EXPORT_SYMBOL(qdio_activate);
3948 EXPORT_SYMBOL(do_QDIO);
3949 EXPORT_SYMBOL(qdio_shutdown);
3950 EXPORT_SYMBOL(qdio_free);
3951 EXPORT_SYMBOL(qdio_cleanup);
3952 EXPORT_SYMBOL(qdio_synchronize);