git.oblomov.eu Git - linux-2.6/blob - 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(unsigned long q)
1028 {
1029         __qdio_outbound_processing((struct qdio_q *) 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(unsigned long q)
1453 {
1454         __tiqdio_inbound_processing((struct qdio_q *) q,
1455                                     atomic_read(&spare_indicator_usecount));
1456 }
1457
1458 static void
1459 __qdio_inbound_processing(struct qdio_q *q)
1460 {
1461         int q_laps=0;
1462
1463         QDIO_DBF_TEXT4(0,trace,"qinproc");
1464         QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
1465
1466         if (unlikely(qdio_reserve_q(q))) {
1467                 qdio_release_q(q);
1468                 qdio_perf_stat_inc(&perf_stats.inbound_tl_runs_resched);
1469                 /* as we're sissies, we'll check next time */
1470                 if (likely(!atomic_read(&q->is_in_shutdown))) {
1471                         qdio_mark_q(q);
1472                         QDIO_DBF_TEXT4(0,trace,"busy,agn");
1473                 }
1474                 return;
1475         }
1476         qdio_perf_stat_inc(&perf_stats.inbound_tl_runs);
1477         qdio_perf_stat_inc(&perf_stats.tl_runs);
1478
1479 again:
1480         if (qdio_has_inbound_q_moved(q)) {
1481                 qdio_kick_inbound_handler(q);
1482                 if (!qdio_stop_polling(q)) {
1483                         q_laps++;
1484                         if (q_laps<QDIO_Q_LAPS)
1485                                 goto again;
1486                 }
1487                 qdio_mark_q(q);
1488         } else {
1489                 if (!qdio_is_inbound_q_done(q))
1490                         /* means poll time is not yet over */
1491                         qdio_mark_q(q);
1492         }
1493
1494         qdio_release_q(q);
1495 }
1496
1497 static void
1498 qdio_inbound_processing(unsigned long q)
1499 {
1500         __qdio_inbound_processing((struct qdio_q *) q);
1501 }
1502
1503 /************************* MAIN ROUTINES *******************************/
1504
1505 #ifdef QDIO_USE_PROCESSING_STATE
1506 static int
1507 tiqdio_reset_processing_state(struct qdio_q *q, int q_laps)
1508 {
1509         if (!q) {
1510                 tiqdio_sched_tl();
1511                 return 0;
1512         }
1513
1514         /*
1515          * under VM, we have not used the PROCESSING state, so no
1516          * need to stop polling
1517          */
1518         if (q->siga_sync)
1519                 return 2;
1520
1521         if (unlikely(qdio_reserve_q(q))) {
1522                 qdio_release_q(q);
1523                 qdio_perf_stat_inc(&perf_stats.inbound_thin_tl_runs_resched);
1524                 /*
1525                  * as we might just be about to stop polling, we make
1526                  * sure that we check again at least once more
1527                  */
1528
1529                 /*
1530                  * sanity -- we'd get here without setting the
1531                  * dev st chg ind
1532                  */
1533                 tiqdio_set_summary_bit((__u32*)q->dev_st_chg_ind);
1534                 tiqdio_sched_tl();
1535                 return 0;
1536         }
1537         if (qdio_stop_polling(q)) {
1538                 qdio_release_q(q);
1539                 return 2;
1540         }
1541         if (q_laps<QDIO_Q_LAPS-1) {
1542                 qdio_release_q(q);
1543                 return 3;
1544         }
1545         /*
1546          * we set the flags to get into the stuff
1547          * next time, see also comment in qdio_stop_polling
1548          */
1549         tiqdio_set_summary_bit((__u32*)q->dev_st_chg_ind);
1550         tiqdio_sched_tl();
1551         qdio_release_q(q);
1552         return 1;
1553
1554 }
1555 #endif /* QDIO_USE_PROCESSING_STATE */
1556
1557 static void
1558 tiqdio_inbound_checks(void)
1559 {
1560         struct qdio_q *q;
1561         int spare_ind_was_set=0;
1562 #ifdef QDIO_USE_PROCESSING_STATE
1563         int q_laps=0;
1564 #endif /* QDIO_USE_PROCESSING_STATE */
1565
1566         QDIO_DBF_TEXT4(0,trace,"iqdinbck");
1567         QDIO_DBF_TEXT5(0,trace,"iqlocsum");
1568
1569 #ifdef QDIO_USE_PROCESSING_STATE
1570 again:
1571 #endif /* QDIO_USE_PROCESSING_STATE */
1572
1573         /* when the spare indicator is used and set, save that and clear it */
1574         if ((atomic_read(&spare_indicator_usecount)) && spare_indicator) {
1575                 spare_ind_was_set = 1;
1576                 tiqdio_clear_summary_bit((__u32*)&spare_indicator);
1577         }
1578
1579         q=(struct qdio_q*)tiq_list;
1580         do {
1581                 if (!q)
1582                         break;
1583                 __tiqdio_inbound_processing(q, spare_ind_was_set);
1584                 q=(struct qdio_q*)q->list_next;
1585         } while (q!=(struct qdio_q*)tiq_list);
1586
1587 #ifdef QDIO_USE_PROCESSING_STATE
1588         q=(struct qdio_q*)tiq_list;
1589         do {
1590                 int ret;
1591
1592                 ret = tiqdio_reset_processing_state(q, q_laps);
1593                 switch (ret) {
1594                 case 0:
1595                         return;
1596                 case 1:
1597                         q_laps++;
1598                 case 2:
1599                         q = (struct qdio_q*)q->list_next;
1600                         break;
1601                 default:
1602                         q_laps++;
1603                         goto again;
1604                 }
1605         } while (q!=(struct qdio_q*)tiq_list);
1606 #endif /* QDIO_USE_PROCESSING_STATE */
1607 }
1608
1609 static void
1610 tiqdio_tl(unsigned long data)
1611 {
1612         QDIO_DBF_TEXT4(0,trace,"iqdio_tl");
1613
1614         qdio_perf_stat_inc(&perf_stats.tl_runs);
1615
1616         tiqdio_inbound_checks();
1617 }
1618
1619 /********************* GENERAL HELPER_ROUTINES ***********************/
1620
1621 static void
1622 qdio_release_irq_memory(struct qdio_irq *irq_ptr)
1623 {
1624         int i;
1625         struct qdio_q *q;
1626
1627         for (i = 0; i < QDIO_MAX_QUEUES_PER_IRQ; i++) {
1628                 q = irq_ptr->input_qs[i];
1629                 if (q) {
1630                         free_page((unsigned long) q->slib);
1631                         kmem_cache_free(qdio_q_cache, q);
1632                 }
1633                 q = irq_ptr->output_qs[i];
1634                 if (q) {
1635                         free_page((unsigned long) q->slib);
1636                         kmem_cache_free(qdio_q_cache, q);
1637                 }
1638         }
1639         free_page((unsigned long) irq_ptr->qdr);
1640         free_page((unsigned long) irq_ptr);
1641 }
1642
1643 static void
1644 qdio_set_impl_params(struct qdio_irq *irq_ptr,
1645                      unsigned int qib_param_field_format,
1646                      /* pointer to 128 bytes or NULL, if no param field */
1647                      unsigned char *qib_param_field,
1648                      /* pointer to no_queues*128 words of data or NULL */
1649                      unsigned int no_input_qs,
1650                      unsigned int no_output_qs,
1651                      unsigned long *input_slib_elements,
1652                      unsigned long *output_slib_elements)
1653 {
1654         int i,j;
1655
1656         if (!irq_ptr)
1657                 return;
1658
1659         irq_ptr->qib.pfmt=qib_param_field_format;
1660         if (qib_param_field)
1661                 memcpy(irq_ptr->qib.parm,qib_param_field,
1662                        QDIO_MAX_BUFFERS_PER_Q);
1663
1664         if (input_slib_elements)
1665                 for (i=0;i<no_input_qs;i++) {
1666                         for (j=0;j<QDIO_MAX_BUFFERS_PER_Q;j++)
1667                                 irq_ptr->input_qs[i]->slib->slibe[j].parms=
1668                                         input_slib_elements[
1669                                                 i*QDIO_MAX_BUFFERS_PER_Q+j];
1670                 }
1671         if (output_slib_elements)
1672                 for (i=0;i<no_output_qs;i++) {
1673                         for (j=0;j<QDIO_MAX_BUFFERS_PER_Q;j++)
1674                                 irq_ptr->output_qs[i]->slib->slibe[j].parms=
1675                                         output_slib_elements[
1676                                                 i*QDIO_MAX_BUFFERS_PER_Q+j];
1677                 }
1678 }
1679
1680 static int
1681 qdio_alloc_qs(struct qdio_irq *irq_ptr,
1682               int no_input_qs, int no_output_qs)
1683 {
1684         int i;
1685         struct qdio_q *q;
1686
1687         for (i = 0; i < no_input_qs; i++) {
1688                 q = kmem_cache_alloc(qdio_q_cache, GFP_KERNEL);
1689                 if (!q)
1690                         return -ENOMEM;
1691                 memset(q, 0, sizeof(*q));
1692
1693                 q->slib = (struct slib *) __get_free_page(GFP_KERNEL);
1694                 if (!q->slib) {
1695                         kmem_cache_free(qdio_q_cache, q);
1696                         return -ENOMEM;
1697                 }
1698                 irq_ptr->input_qs[i]=q;
1699         }
1700
1701         for (i = 0; i < no_output_qs; i++) {
1702                 q = kmem_cache_alloc(qdio_q_cache, GFP_KERNEL);
1703                 if (!q)
1704                         return -ENOMEM;
1705                 memset(q, 0, sizeof(*q));
1706
1707                 q->slib = (struct slib *) __get_free_page(GFP_KERNEL);
1708                 if (!q->slib) {
1709                         kmem_cache_free(qdio_q_cache, q);
1710                         return -ENOMEM;
1711                 }
1712                 irq_ptr->output_qs[i]=q;
1713         }
1714         return 0;
1715 }
1716
1717 static void
1718 qdio_fill_qs(struct qdio_irq *irq_ptr, struct ccw_device *cdev,
1719              int no_input_qs, int no_output_qs,
1720              qdio_handler_t *input_handler,
1721              qdio_handler_t *output_handler,
1722              unsigned long int_parm,int q_format,
1723              unsigned long flags,
1724              void **inbound_sbals_array,
1725              void **outbound_sbals_array)
1726 {
1727         struct qdio_q *q;
1728         int i,j;
1729         char dbf_text[20]; /* see qdio_initialize */
1730         void *ptr;
1731         int available;
1732
1733         sprintf(dbf_text,"qfqs%4x",cdev->private->schid.sch_no);
1734         QDIO_DBF_TEXT0(0,setup,dbf_text);
1735         for (i=0;i<no_input_qs;i++) {
1736                 q=irq_ptr->input_qs[i];
1737
1738                 memset(q,0,((char*)&q->slib)-((char*)q));
1739                 sprintf(dbf_text,"in-q%4x",i);
1740                 QDIO_DBF_TEXT0(0,setup,dbf_text);
1741                 QDIO_DBF_HEX0(0,setup,&q,sizeof(void*));
1742
1743                 memset(q->slib,0,PAGE_SIZE);
1744                 q->sl=(struct sl*)(((char*)q->slib)+PAGE_SIZE/2);
1745
1746                 available=0;
1747
1748                 for (j=0;j<QDIO_MAX_BUFFERS_PER_Q;j++)
1749                         q->sbal[j]=*(inbound_sbals_array++);
1750
1751                 q->queue_type=q_format;
1752                 q->int_parm=int_parm;
1753                 q->schid = irq_ptr->schid;
1754                 q->irq_ptr = irq_ptr;
1755                 q->cdev = cdev;
1756                 q->mask=1<<(31-i);
1757                 q->q_no=i;
1758                 q->is_input_q=1;
1759                 q->first_to_check=0;
1760                 q->last_move_ftc=0;
1761                 q->handler=input_handler;
1762                 q->dev_st_chg_ind=irq_ptr->dev_st_chg_ind;
1763
1764                 /* q->is_thinint_q isn't valid at this time, but
1765                  * irq_ptr->is_thinint_irq is
1766                  */
1767                 if (irq_ptr->is_thinint_irq)
1768                         tasklet_init(&q->tasklet, tiqdio_inbound_processing,
1769                                      (unsigned long) q);
1770                 else
1771                         tasklet_init(&q->tasklet, qdio_inbound_processing,
1772                                      (unsigned long) q);
1773
1774                 /* actually this is not used for inbound queues. yet. */
1775                 atomic_set(&q->busy_siga_counter,0);
1776                 q->timing.busy_start=0;
1777
1778 /*              for (j=0;j<QDIO_STATS_NUMBER;j++)
1779                         q->timing.last_transfer_times[j]=(qdio_get_micros()/
1780                                                           QDIO_STATS_NUMBER)*j;
1781                 q->timing.last_transfer_index=QDIO_STATS_NUMBER-1;
1782 */
1783
1784                 /* fill in slib */
1785                 if (i>0) irq_ptr->input_qs[i-1]->slib->nsliba=
1786                                  (unsigned long)(q->slib);
1787                 q->slib->sla=(unsigned long)(q->sl);
1788                 q->slib->slsba=(unsigned long)(&q->slsb.acc.val[0]);
1789
1790                 /* fill in sl */
1791                 for (j=0;j<QDIO_MAX_BUFFERS_PER_Q;j++)
1792                         q->sl->element[j].sbal=(unsigned long)(q->sbal[j]);
1793
1794                 QDIO_DBF_TEXT2(0,setup,"sl-sb-b0");
1795                 ptr=(void*)q->sl;
1796                 QDIO_DBF_HEX2(0,setup,&ptr,sizeof(void*));
1797                 ptr=(void*)&q->slsb;
1798                 QDIO_DBF_HEX2(0,setup,&ptr,sizeof(void*));
1799                 ptr=(void*)q->sbal[0];
1800                 QDIO_DBF_HEX2(0,setup,&ptr,sizeof(void*));
1801
1802                 /* fill in slsb */
1803                 if (!irq_ptr->is_qebsm) {
1804                         unsigned int count = 1;
1805                         for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; j++)
1806                                 set_slsb(q, &j, SLSB_P_INPUT_NOT_INIT, &count);
1807                 }
1808         }
1809
1810         for (i=0;i<no_output_qs;i++) {
1811                 q=irq_ptr->output_qs[i];
1812                 memset(q,0,((char*)&q->slib)-((char*)q));
1813
1814                 sprintf(dbf_text,"outq%4x",i);
1815                 QDIO_DBF_TEXT0(0,setup,dbf_text);
1816                 QDIO_DBF_HEX0(0,setup,&q,sizeof(void*));
1817
1818                 memset(q->slib,0,PAGE_SIZE);
1819                 q->sl=(struct sl*)(((char*)q->slib)+PAGE_SIZE/2);
1820
1821                 available=0;
1822
1823                 for (j=0;j<QDIO_MAX_BUFFERS_PER_Q;j++)
1824                         q->sbal[j]=*(outbound_sbals_array++);
1825
1826                 q->queue_type=q_format;
1827                 if ((q->queue_type == QDIO_IQDIO_QFMT) &&
1828                     (no_output_qs > 1) &&
1829                     (i == no_output_qs-1))
1830                         q->queue_type = QDIO_IQDIO_QFMT_ASYNCH;
1831                 q->int_parm=int_parm;
1832                 q->is_input_q=0;
1833                 q->is_pci_out = 0;
1834                 q->schid = irq_ptr->schid;
1835                 q->cdev = cdev;
1836                 q->irq_ptr = irq_ptr;
1837                 q->mask=1<<(31-i);
1838                 q->q_no=i;
1839                 q->first_to_check=0;
1840                 q->last_move_ftc=0;
1841                 q->handler=output_handler;
1842
1843                 tasklet_init(&q->tasklet, qdio_outbound_processing,
1844                              (unsigned long) q);
1845                 setup_timer(&q->timer, qdio_outbound_processing,
1846                             (unsigned long) q);
1847
1848                 atomic_set(&q->busy_siga_counter,0);
1849                 q->timing.busy_start=0;
1850
1851                 /* fill in slib */
1852                 if (i>0) irq_ptr->output_qs[i-1]->slib->nsliba=
1853                                  (unsigned long)(q->slib);
1854                 q->slib->sla=(unsigned long)(q->sl);
1855                 q->slib->slsba=(unsigned long)(&q->slsb.acc.val[0]);
1856
1857                 /* fill in sl */
1858                 for (j=0;j<QDIO_MAX_BUFFERS_PER_Q;j++)
1859                         q->sl->element[j].sbal=(unsigned long)(q->sbal[j]);
1860
1861                 QDIO_DBF_TEXT2(0,setup,"sl-sb-b0");
1862                 ptr=(void*)q->sl;
1863                 QDIO_DBF_HEX2(0,setup,&ptr,sizeof(void*));
1864                 ptr=(void*)&q->slsb;
1865                 QDIO_DBF_HEX2(0,setup,&ptr,sizeof(void*));
1866                 ptr=(void*)q->sbal[0];
1867                 QDIO_DBF_HEX2(0,setup,&ptr,sizeof(void*));
1868
1869                 /* fill in slsb */
1870                 if (!irq_ptr->is_qebsm) {
1871                         unsigned int count = 1;
1872                         for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; j++)
1873                                 set_slsb(q, &j, SLSB_P_OUTPUT_NOT_INIT, &count);
1874                 }
1875         }
1876 }
1877
1878 static void
1879 qdio_fill_thresholds(struct qdio_irq *irq_ptr,
1880                      unsigned int no_input_qs,
1881                      unsigned int no_output_qs,
1882                      unsigned int min_input_threshold,
1883                      unsigned int max_input_threshold,
1884                      unsigned int min_output_threshold,
1885                      unsigned int max_output_threshold)
1886 {
1887         int i;
1888         struct qdio_q *q;
1889
1890         for (i=0;i<no_input_qs;i++) {
1891                 q=irq_ptr->input_qs[i];
1892                 q->timing.threshold=max_input_threshold;
1893 /*              for (j=0;j<QDIO_STATS_CLASSES;j++) {
1894                         q->threshold_classes[j].threshold=
1895                                 min_input_threshold+
1896                                 (max_input_threshold-min_input_threshold)/
1897                                 QDIO_STATS_CLASSES;
1898                 }
1899                 qdio_use_thresholds(q,QDIO_STATS_CLASSES/2);*/
1900         }
1901         for (i=0;i<no_output_qs;i++) {
1902                 q=irq_ptr->output_qs[i];
1903                 q->timing.threshold=max_output_threshold;
1904 /*              for (j=0;j<QDIO_STATS_CLASSES;j++) {
1905                         q->threshold_classes[j].threshold=
1906                                 min_output_threshold+
1907                                 (max_output_threshold-min_output_threshold)/
1908                                 QDIO_STATS_CLASSES;
1909                 }
1910                 qdio_use_thresholds(q,QDIO_STATS_CLASSES/2);*/
1911         }
1912 }
1913
1914 static int
1915 tiqdio_thinint_handler(void)
1916 {
1917         QDIO_DBF_TEXT4(0,trace,"thin_int");
1918
1919         qdio_perf_stat_inc(&perf_stats.thinints);
1920
1921         /* SVS only when needed:
1922          * issue SVS to benefit from iqdio interrupt avoidance
1923          * (SVS clears AISOI)*/
1924         if (!omit_svs)
1925                 tiqdio_clear_global_summary();
1926
1927         tiqdio_inbound_checks();
1928         return 0;
1929 }
1930
1931 static void
1932 qdio_set_state(struct qdio_irq *irq_ptr, enum qdio_irq_states state)
1933 {
1934         int i;
1935 #ifdef CONFIG_QDIO_DEBUG
1936         char dbf_text[15];
1937
1938         QDIO_DBF_TEXT5(0,trace,"newstate");
1939         sprintf(dbf_text,"%4x%4x",irq_ptr->schid.sch_no,state);
1940         QDIO_DBF_TEXT5(0,trace,dbf_text);
1941 #endif /* CONFIG_QDIO_DEBUG */
1942
1943         irq_ptr->state=state;
1944         for (i=0;i<irq_ptr->no_input_qs;i++)
1945                 irq_ptr->input_qs[i]->state=state;
1946         for (i=0;i<irq_ptr->no_output_qs;i++)
1947                 irq_ptr->output_qs[i]->state=state;
1948         mb();
1949 }
1950
1951 static void
1952 qdio_irq_check_sense(struct subchannel_id schid, struct irb *irb)
1953 {
1954         char dbf_text[15];
1955
1956         if (irb->esw.esw0.erw.cons) {
1957                 sprintf(dbf_text,"sens%4x",schid.sch_no);
1958                 QDIO_DBF_TEXT2(1,trace,dbf_text);
1959                 QDIO_DBF_HEX0(0,sense,irb,QDIO_DBF_SENSE_LEN);
1960
1961                 QDIO_PRINT_WARN("sense data available on qdio channel.\n");
1962                 QDIO_HEXDUMP16(WARN,"irb: ",irb);
1963                 QDIO_HEXDUMP16(WARN,"sense data: ",irb->ecw);
1964         }
1965
1966 }
1967
1968 static void
1969 qdio_handle_pci(struct qdio_irq *irq_ptr)
1970 {
1971         int i;
1972         struct qdio_q *q;
1973
1974         qdio_perf_stat_inc(&perf_stats.pcis);
1975         for (i=0;i<irq_ptr->no_input_qs;i++) {
1976                 q=irq_ptr->input_qs[i];
1977                 if (q->is_input_q&QDIO_FLAG_NO_INPUT_INTERRUPT_CONTEXT)
1978                         qdio_mark_q(q);
1979                 else {
1980                         qdio_perf_stat_dec(&perf_stats.tl_runs);
1981                         __qdio_inbound_processing(q);
1982                 }
1983         }
1984         if (!irq_ptr->hydra_gives_outbound_pcis)
1985                 return;
1986         for (i=0;i<irq_ptr->no_output_qs;i++) {
1987                 q=irq_ptr->output_qs[i];
1988                 if (qdio_is_outbound_q_done(q))
1989                         continue;
1990                 qdio_perf_stat_dec(&perf_stats.tl_runs);
1991                 if (!irq_ptr->sync_done_on_outb_pcis)
1992                         SYNC_MEMORY;
1993                 __qdio_outbound_processing(q);
1994         }
1995 }
1996
1997 static void qdio_establish_handle_irq(struct ccw_device*, int, int);
1998
1999 static void
2000 qdio_handle_activate_check(struct ccw_device *cdev, unsigned long intparm,
2001                            int cstat, int dstat)
2002 {
2003         struct qdio_irq *irq_ptr;
2004         struct qdio_q *q;
2005         char dbf_text[15];
2006
2007         irq_ptr = cdev->private->qdio_data;
2008
2009         QDIO_DBF_TEXT2(1, trace, "ick2");
2010         sprintf(dbf_text,"%s", cdev->dev.bus_id);
2011         QDIO_DBF_TEXT2(1,trace,dbf_text);
2012         QDIO_DBF_HEX2(0,trace,&intparm,sizeof(int));
2013         QDIO_DBF_HEX2(0,trace,&dstat,sizeof(int));
2014         QDIO_DBF_HEX2(0,trace,&cstat,sizeof(int));
2015         QDIO_PRINT_ERR("received check condition on activate " \
2016                        "queues on device %s (cs=x%x, ds=x%x).\n",
2017                        cdev->dev.bus_id, cstat, dstat);
2018         if (irq_ptr->no_input_qs) {
2019                 q=irq_ptr->input_qs[0];
2020         } else if (irq_ptr->no_output_qs) {
2021                 q=irq_ptr->output_qs[0];
2022         } else {
2023                 QDIO_PRINT_ERR("oops... no queue registered for device %s!?\n",
2024                                cdev->dev.bus_id);
2025                 goto omit_handler_call;
2026         }
2027         q->handler(q->cdev,QDIO_STATUS_ACTIVATE_CHECK_CONDITION|
2028                    QDIO_STATUS_LOOK_FOR_ERROR,
2029                    0,0,0,-1,-1,q->int_parm);
2030 omit_handler_call:
2031         qdio_set_state(irq_ptr,QDIO_IRQ_STATE_STOPPED);
2032
2033 }
2034
2035 static void
2036 qdio_call_shutdown(struct work_struct *work)
2037 {
2038         struct ccw_device_private *priv;
2039         struct ccw_device *cdev;
2040
2041         priv = container_of(work, struct ccw_device_private, kick_work);
2042         cdev = priv->cdev;
2043         qdio_shutdown(cdev, QDIO_FLAG_CLEANUP_USING_CLEAR);
2044         put_device(&cdev->dev);
2045 }
2046
2047 static void
2048 qdio_timeout_handler(struct ccw_device *cdev)
2049 {
2050         struct qdio_irq *irq_ptr;
2051         char dbf_text[15];
2052
2053         QDIO_DBF_TEXT2(0, trace, "qtoh");
2054         sprintf(dbf_text, "%s", cdev->dev.bus_id);
2055         QDIO_DBF_TEXT2(0, trace, dbf_text);
2056
2057         irq_ptr = cdev->private->qdio_data;
2058         sprintf(dbf_text, "state:%d", irq_ptr->state);
2059         QDIO_DBF_TEXT2(0, trace, dbf_text);
2060
2061         switch (irq_ptr->state) {
2062         case QDIO_IRQ_STATE_INACTIVE:
2063                 QDIO_PRINT_ERR("establish queues on irq 0.%x.%04x: timed out\n",
2064                                irq_ptr->schid.ssid, irq_ptr->schid.sch_no);
2065                 QDIO_DBF_TEXT2(1,setup,"eq:timeo");
2066                 qdio_set_state(irq_ptr, QDIO_IRQ_STATE_ERR);
2067                 break;
2068         case QDIO_IRQ_STATE_CLEANUP:
2069                 QDIO_PRINT_INFO("Did not get interrupt on cleanup, "
2070                                 "irq=0.%x.%x.\n",
2071                                 irq_ptr->schid.ssid, irq_ptr->schid.sch_no);
2072                 qdio_set_state(irq_ptr, QDIO_IRQ_STATE_ERR);
2073                 break;
2074         case QDIO_IRQ_STATE_ESTABLISHED:
2075         case QDIO_IRQ_STATE_ACTIVE:
2076                 /* I/O has been terminated by common I/O layer. */
2077                 QDIO_PRINT_INFO("Queues on irq 0.%x.%04x killed by cio.\n",
2078                                 irq_ptr->schid.ssid, irq_ptr->schid.sch_no);
2079                 QDIO_DBF_TEXT2(1, trace, "cio:term");
2080                 qdio_set_state(irq_ptr, QDIO_IRQ_STATE_STOPPED);
2081                 if (get_device(&cdev->dev)) {
2082                         /* Can't call shutdown from interrupt context. */
2083                         PREPARE_WORK(&cdev->private->kick_work,
2084                                      qdio_call_shutdown);
2085                         queue_work(ccw_device_work, &cdev->private->kick_work);
2086                 }
2087                 break;
2088         default:
2089                 BUG();
2090         }
2091         ccw_device_set_timeout(cdev, 0);
2092         wake_up(&cdev->private->wait_q);
2093 }
2094
2095 static void
2096 qdio_handler(struct ccw_device *cdev, unsigned long intparm, struct irb *irb)
2097 {
2098         struct qdio_irq *irq_ptr;
2099         int cstat,dstat;
2100         char dbf_text[15];
2101
2102 #ifdef CONFIG_QDIO_DEBUG
2103         QDIO_DBF_TEXT4(0, trace, "qint");
2104         sprintf(dbf_text, "%s", cdev->dev.bus_id);
2105         QDIO_DBF_TEXT4(0, trace, dbf_text);
2106 #endif /* CONFIG_QDIO_DEBUG */
2107
2108         if (!intparm) {
2109                 QDIO_PRINT_ERR("got unsolicited interrupt in qdio " \
2110                                   "handler, device %s\n", cdev->dev.bus_id);
2111                 return;
2112         }
2113
2114         irq_ptr = cdev->private->qdio_data;
2115         if (!irq_ptr) {
2116                 QDIO_DBF_TEXT2(1, trace, "uint");
2117                 sprintf(dbf_text,"%s", cdev->dev.bus_id);
2118                 QDIO_DBF_TEXT2(1,trace,dbf_text);
2119                 QDIO_PRINT_ERR("received interrupt on unused device %s!\n",
2120                                cdev->dev.bus_id);
2121                 return;
2122         }
2123
2124         if (IS_ERR(irb)) {
2125                 /* Currently running i/o is in error. */
2126                 switch (PTR_ERR(irb)) {
2127                 case -EIO:
2128                         QDIO_PRINT_ERR("i/o error on device %s\n",
2129                                        cdev->dev.bus_id);
2130                         return;
2131                 case -ETIMEDOUT:
2132                         qdio_timeout_handler(cdev);
2133                         return;
2134                 default:
2135                         QDIO_PRINT_ERR("unknown error state %ld on device %s\n",
2136                                        PTR_ERR(irb), cdev->dev.bus_id);
2137                         return;
2138                 }
2139         }
2140
2141         qdio_irq_check_sense(irq_ptr->schid, irb);
2142
2143 #ifdef CONFIG_QDIO_DEBUG
2144         sprintf(dbf_text, "state:%d", irq_ptr->state);
2145         QDIO_DBF_TEXT4(0, trace, dbf_text);
2146 #endif /* CONFIG_QDIO_DEBUG */
2147
2148         cstat = irb->scsw.cstat;
2149         dstat = irb->scsw.dstat;
2150
2151         switch (irq_ptr->state) {
2152         case QDIO_IRQ_STATE_INACTIVE:
2153                 qdio_establish_handle_irq(cdev, cstat, dstat);
2154                 break;
2155
2156         case QDIO_IRQ_STATE_CLEANUP:
2157                 qdio_set_state(irq_ptr, QDIO_IRQ_STATE_INACTIVE);
2158                 break;
2159
2160         case QDIO_IRQ_STATE_ESTABLISHED:
2161         case QDIO_IRQ_STATE_ACTIVE:
2162                 if (cstat & SCHN_STAT_PCI) {
2163                         qdio_handle_pci(irq_ptr);
2164                         break;
2165                 }
2166
2167                 if ((cstat&~SCHN_STAT_PCI)||dstat) {
2168                         qdio_handle_activate_check(cdev, intparm, cstat, dstat);
2169                         break;
2170                 }
2171         default:
2172                 QDIO_PRINT_ERR("got interrupt for queues in state %d on " \
2173                                "device %s?!\n",
2174                                irq_ptr->state, cdev->dev.bus_id);
2175         }
2176         wake_up(&cdev->private->wait_q);
2177
2178 }
2179
2180 int
2181 qdio_synchronize(struct ccw_device *cdev, unsigned int flags,
2182                  unsigned int queue_number)
2183 {
2184         int cc = 0;
2185         struct qdio_q *q;
2186         struct qdio_irq *irq_ptr;
2187         void *ptr;
2188 #ifdef CONFIG_QDIO_DEBUG
2189         char dbf_text[15]="SyncXXXX";
2190 #endif
2191
2192         irq_ptr = cdev->private->qdio_data;
2193         if (!irq_ptr)
2194                 return -ENODEV;
2195
2196 #ifdef CONFIG_QDIO_DEBUG
2197         *((int*)(&dbf_text[4])) = irq_ptr->schid.sch_no;
2198         QDIO_DBF_HEX4(0,trace,dbf_text,QDIO_DBF_TRACE_LEN);
2199         *((int*)(&dbf_text[0]))=flags;
2200         *((int*)(&dbf_text[4]))=queue_number;
2201         QDIO_DBF_HEX4(0,trace,dbf_text,QDIO_DBF_TRACE_LEN);
2202 #endif /* CONFIG_QDIO_DEBUG */
2203
2204         if (flags&QDIO_FLAG_SYNC_INPUT) {
2205                 q=irq_ptr->input_qs[queue_number];
2206                 if (!q)
2207                         return -EINVAL;
2208                 if (!(irq_ptr->is_qebsm))
2209                         cc = do_siga_sync(q->schid, 0, q->mask);
2210         } else if (flags&QDIO_FLAG_SYNC_OUTPUT) {
2211                 q=irq_ptr->output_qs[queue_number];
2212                 if (!q)
2213                         return -EINVAL;
2214                 if (!(irq_ptr->is_qebsm))
2215                         cc = do_siga_sync(q->schid, q->mask, 0);
2216         } else
2217                 return -EINVAL;
2218
2219         ptr=&cc;
2220         if (cc)
2221                 QDIO_DBF_HEX3(0,trace,&ptr,sizeof(int));
2222
2223         return cc;
2224 }
2225
2226 static void
2227 qdio_check_subchannel_qebsm(struct qdio_irq *irq_ptr, unsigned char qdioac,
2228                             unsigned long token)
2229 {
2230         struct qdio_q *q;
2231         int i;
2232         unsigned int count, start_buf;
2233         char dbf_text[15];
2234
2235         /*check if QEBSM is disabled */
2236         if (!(irq_ptr->is_qebsm) || !(qdioac & 0x01)) {
2237                 irq_ptr->is_qebsm  = 0;
2238                 irq_ptr->sch_token = 0;
2239                 irq_ptr->qib.rflags &= ~QIB_RFLAGS_ENABLE_QEBSM;
2240                 QDIO_DBF_TEXT0(0,setup,"noV=V");
2241                 return;
2242         }
2243         irq_ptr->sch_token = token;
2244         /*input queue*/
2245         for (i = 0; i < irq_ptr->no_input_qs;i++) {
2246                 q = irq_ptr->input_qs[i];
2247                 count = QDIO_MAX_BUFFERS_PER_Q;
2248                 start_buf = 0;
2249                 set_slsb(q, &start_buf, SLSB_P_INPUT_NOT_INIT, &count);
2250         }
2251         sprintf(dbf_text,"V=V:%2x",irq_ptr->is_qebsm);
2252         QDIO_DBF_TEXT0(0,setup,dbf_text);
2253         sprintf(dbf_text,"%8lx",irq_ptr->sch_token);
2254         QDIO_DBF_TEXT0(0,setup,dbf_text);
2255         /*output queue*/
2256         for (i = 0; i < irq_ptr->no_output_qs; i++) {
2257                 q = irq_ptr->output_qs[i];
2258                 count = QDIO_MAX_BUFFERS_PER_Q;
2259                 start_buf = 0;
2260                 set_slsb(q, &start_buf, SLSB_P_OUTPUT_NOT_INIT, &count);
2261         }
2262 }
2263
2264 static void
2265 qdio_get_ssqd_information(struct qdio_irq *irq_ptr)
2266 {
2267         int result;
2268         unsigned char qdioac;
2269         struct {
2270                 struct chsc_header request;
2271                 u16 reserved1:10;
2272                 u16 ssid:2;
2273                 u16 fmt:4;
2274                 u16 first_sch;
2275                 u16 reserved2;
2276                 u16 last_sch;
2277                 u32 reserved3;
2278                 struct chsc_header response;
2279                 u32 reserved4;
2280                 u8  flags;
2281                 u8  reserved5;
2282                 u16 sch;
2283                 u8  qfmt;
2284                 u8  parm;
2285                 u8  qdioac1;
2286                 u8  sch_class;
2287                 u8  reserved7;
2288                 u8  icnt;
2289                 u8  reserved8;
2290                 u8  ocnt;
2291                 u8 reserved9;
2292                 u8 mbccnt;
2293                 u16 qdioac2;
2294                 u64 sch_token;
2295         } *ssqd_area;
2296
2297         QDIO_DBF_TEXT0(0,setup,"getssqd");
2298         qdioac = 0;
2299         ssqd_area = mempool_alloc(qdio_mempool_scssc, GFP_ATOMIC);
2300         if (!ssqd_area) {
2301                 QDIO_PRINT_WARN("Could not get memory for chsc. Using all " \
2302                                 "SIGAs for sch x%x.\n", irq_ptr->schid.sch_no);
2303                 irq_ptr->qdioac = CHSC_FLAG_SIGA_INPUT_NECESSARY |
2304                                   CHSC_FLAG_SIGA_OUTPUT_NECESSARY |
2305                                   CHSC_FLAG_SIGA_SYNC_NECESSARY; /* all flags set */
2306                 irq_ptr->is_qebsm = 0;
2307                 irq_ptr->sch_token = 0;
2308                 irq_ptr->qib.rflags &= ~QIB_RFLAGS_ENABLE_QEBSM;
2309                 return;
2310         }
2311
2312         ssqd_area->request = (struct chsc_header) {
2313                 .length = 0x0010,
2314                 .code   = 0x0024,
2315         };
2316         ssqd_area->first_sch = irq_ptr->schid.sch_no;
2317         ssqd_area->last_sch = irq_ptr->schid.sch_no;
2318         ssqd_area->ssid = irq_ptr->schid.ssid;
2319         result = chsc(ssqd_area);
2320
2321         if (result) {
2322                 QDIO_PRINT_WARN("CHSC returned cc %i. Using all " \
2323                                 "SIGAs for sch 0.%x.%x.\n", result,
2324                                 irq_ptr->schid.ssid, irq_ptr->schid.sch_no);
2325                 qdioac = CHSC_FLAG_SIGA_INPUT_NECESSARY |
2326                         CHSC_FLAG_SIGA_OUTPUT_NECESSARY |
2327                         CHSC_FLAG_SIGA_SYNC_NECESSARY; /* all flags set */
2328                 irq_ptr->is_qebsm  = 0;
2329                 goto out;
2330         }
2331
2332         if (ssqd_area->response.code != QDIO_CHSC_RESPONSE_CODE_OK) {
2333                 QDIO_PRINT_WARN("response upon checking SIGA needs " \
2334                                 "is 0x%x. Using all SIGAs for sch 0.%x.%x.\n",
2335                                 ssqd_area->response.code,
2336                                 irq_ptr->schid.ssid, irq_ptr->schid.sch_no);
2337                 qdioac = CHSC_FLAG_SIGA_INPUT_NECESSARY |
2338                         CHSC_FLAG_SIGA_OUTPUT_NECESSARY |
2339                         CHSC_FLAG_SIGA_SYNC_NECESSARY; /* all flags set */
2340                 irq_ptr->is_qebsm  = 0;
2341                 goto out;
2342         }
2343         if (!(ssqd_area->flags & CHSC_FLAG_QDIO_CAPABILITY) ||
2344             !(ssqd_area->flags & CHSC_FLAG_VALIDITY) ||
2345             (ssqd_area->sch != irq_ptr->schid.sch_no)) {
2346                 QDIO_PRINT_WARN("huh? problems checking out sch 0.%x.%x... " \
2347                                 "using all SIGAs.\n",
2348                                 irq_ptr->schid.ssid, irq_ptr->schid.sch_no);
2349                 qdioac = CHSC_FLAG_SIGA_INPUT_NECESSARY |
2350                         CHSC_FLAG_SIGA_OUTPUT_NECESSARY |
2351                         CHSC_FLAG_SIGA_SYNC_NECESSARY; /* worst case */
2352                 irq_ptr->is_qebsm  = 0;
2353                 goto out;
2354         }
2355         qdioac = ssqd_area->qdioac1;
2356 out:
2357         qdio_check_subchannel_qebsm(irq_ptr, qdioac,
2358                                     ssqd_area->sch_token);
2359         mempool_free(ssqd_area, qdio_mempool_scssc);
2360         irq_ptr->qdioac = qdioac;
2361 }
2362
2363 static unsigned int
2364 tiqdio_check_chsc_availability(void)
2365 {
2366         char dbf_text[15];
2367
2368         if (!css_characteristics_avail)
2369                 return -EIO;
2370
2371         /* Check for bit 41. */
2372         if (!css_general_characteristics.aif) {
2373                 QDIO_PRINT_WARN("Adapter interruption facility not " \
2374                                 "installed.\n");
2375                 return -ENOENT;
2376         }
2377
2378         /* Check for bits 107 and 108. */
2379         if (!css_chsc_characteristics.scssc ||
2380             !css_chsc_characteristics.scsscf) {
2381                 QDIO_PRINT_WARN("Set Chan Subsys. Char. & Fast-CHSCs " \
2382                                 "not available.\n");
2383                 return -ENOENT;
2384         }
2385
2386         /* Check for OSA/FCP thin interrupts (bit 67). */
2387         hydra_thinints = css_general_characteristics.aif_osa;
2388         sprintf(dbf_text,"hydrati%1x", hydra_thinints);
2389         QDIO_DBF_TEXT0(0,setup,dbf_text);
2390
2391 #ifdef CONFIG_64BIT
2392         /* Check for QEBSM support in general (bit 58). */
2393         is_passthrough = css_general_characteristics.qebsm;
2394 #endif
2395         sprintf(dbf_text,"cssQBS:%1x", is_passthrough);
2396         QDIO_DBF_TEXT0(0,setup,dbf_text);
2397
2398         /* Check for aif time delay disablement fac (bit 56). If installed,
2399          * omit svs even under lpar (good point by rick again) */
2400         omit_svs = css_general_characteristics.aif_tdd;
2401         sprintf(dbf_text,"omitsvs%1x", omit_svs);
2402         QDIO_DBF_TEXT0(0,setup,dbf_text);
2403         return 0;
2404 }
2405
2406
2407 static unsigned int
2408 tiqdio_set_subchannel_ind(struct qdio_irq *irq_ptr, int reset_to_zero)
2409 {
2410         unsigned long real_addr_local_summary_bit;
2411         unsigned long real_addr_dev_st_chg_ind;
2412         void *ptr;
2413         char dbf_text[15];
2414
2415         unsigned int resp_code;
2416         int result;
2417
2418         struct {
2419                 struct chsc_header request;
2420                 u16 operation_code;
2421                 u16 reserved1;
2422                 u32 reserved2;
2423                 u32 reserved3;
2424                 u64 summary_indicator_addr;
2425                 u64 subchannel_indicator_addr;
2426                 u32 ks:4;
2427                 u32 kc:4;
2428                 u32 reserved4:21;
2429                 u32 isc:3;
2430                 u32 word_with_d_bit;
2431                 /* set to 0x10000000 to enable
2432                  * time delay disablement facility */
2433                 u32 reserved5;
2434                 struct subchannel_id schid;
2435                 u32 reserved6[1004];
2436                 struct chsc_header response;
2437                 u32 reserved7;
2438         } *scssc_area;
2439
2440         if (!irq_ptr->is_thinint_irq)
2441                 return -ENODEV;
2442
2443         if (reset_to_zero) {
2444                 real_addr_local_summary_bit=0;
2445                 real_addr_dev_st_chg_ind=0;
2446         } else {
2447                 real_addr_local_summary_bit=
2448                         virt_to_phys((volatile void *)indicators);
2449                 real_addr_dev_st_chg_ind=
2450                         virt_to_phys((volatile void *)irq_ptr->dev_st_chg_ind);
2451         }
2452
2453         scssc_area = mempool_alloc(qdio_mempool_scssc, GFP_ATOMIC);
2454         if (!scssc_area) {
2455                 QDIO_PRINT_WARN("No memory for setting indicators on " \
2456                                 "subchannel 0.%x.%x.\n",
2457                                 irq_ptr->schid.ssid, irq_ptr->schid.sch_no);
2458                 return -ENOMEM;
2459         }
2460         scssc_area->request = (struct chsc_header) {
2461                 .length = 0x0fe0,
2462                 .code   = 0x0021,
2463         };
2464         scssc_area->operation_code = 0;
2465
2466         scssc_area->summary_indicator_addr = real_addr_local_summary_bit;
2467         scssc_area->subchannel_indicator_addr = real_addr_dev_st_chg_ind;
2468         scssc_area->ks = QDIO_STORAGE_KEY;
2469         scssc_area->kc = QDIO_STORAGE_KEY;
2470         scssc_area->isc = TIQDIO_THININT_ISC;
2471         scssc_area->schid = irq_ptr->schid;
2472         /* enables the time delay disablement facility. Don't care
2473          * whether it is really there (i.e. we haven't checked for
2474          * it) */
2475         if (css_general_characteristics.aif_tdd)
2476                 scssc_area->word_with_d_bit = 0x10000000;
2477         else
2478                 QDIO_PRINT_WARN("Time delay disablement facility " \
2479                                 "not available\n");
2480
2481         result = chsc(scssc_area);
2482         if (result) {
2483                 QDIO_PRINT_WARN("could not set indicators on irq 0.%x.%x, " \
2484                                 "cc=%i.\n",
2485                                 irq_ptr->schid.ssid, irq_ptr->schid.sch_no,result);
2486                 result = -EIO;
2487                 goto out;
2488         }
2489
2490         resp_code = scssc_area->response.code;
2491         if (resp_code!=QDIO_CHSC_RESPONSE_CODE_OK) {
2492                 QDIO_PRINT_WARN("response upon setting indicators " \
2493                                 "is 0x%x.\n",resp_code);
2494                 sprintf(dbf_text,"sidR%4x",resp_code);
2495                 QDIO_DBF_TEXT1(0,trace,dbf_text);
2496                 QDIO_DBF_TEXT1(0,setup,dbf_text);
2497                 ptr=&scssc_area->response;
2498                 QDIO_DBF_HEX2(1,setup,&ptr,QDIO_DBF_SETUP_LEN);
2499                 result = -EIO;
2500                 goto out;
2501         }
2502
2503         QDIO_DBF_TEXT2(0,setup,"setscind");
2504         QDIO_DBF_HEX2(0,setup,&real_addr_local_summary_bit,
2505                       sizeof(unsigned long));
2506         QDIO_DBF_HEX2(0,setup,&real_addr_dev_st_chg_ind,sizeof(unsigned long));
2507         result = 0;
2508 out:
2509         mempool_free(scssc_area, qdio_mempool_scssc);
2510         return result;
2511
2512 }
2513
2514 static unsigned int
2515 tiqdio_set_delay_target(struct qdio_irq *irq_ptr, unsigned long delay_target)
2516 {
2517         unsigned int resp_code;
2518         int result;
2519         void *ptr;
2520         char dbf_text[15];
2521
2522         struct {
2523                 struct chsc_header request;
2524                 u16 operation_code;
2525                 u16 reserved1;
2526                 u32 reserved2;
2527                 u32 reserved3;
2528                 u32 reserved4[2];
2529                 u32 delay_target;
2530                 u32 reserved5[1009];
2531                 struct chsc_header response;
2532                 u32 reserved6;
2533         } *scsscf_area;
2534
2535         if (!irq_ptr->is_thinint_irq)
2536                 return -ENODEV;
2537
2538         scsscf_area = mempool_alloc(qdio_mempool_scssc, GFP_ATOMIC);
2539         if (!scsscf_area) {
2540                 QDIO_PRINT_WARN("No memory for setting delay target on " \
2541                                 "subchannel 0.%x.%x.\n",
2542                                 irq_ptr->schid.ssid, irq_ptr->schid.sch_no);
2543                 return -ENOMEM;
2544         }
2545         scsscf_area->request = (struct chsc_header) {
2546                 .length = 0x0fe0,
2547                 .code   = 0x1027,
2548         };
2549
2550         scsscf_area->delay_target = delay_target<<16;
2551
2552         result=chsc(scsscf_area);
2553         if (result) {
2554                 QDIO_PRINT_WARN("could not set delay target on irq 0.%x.%x, " \
2555                                 "cc=%i. Continuing.\n",
2556                                 irq_ptr->schid.ssid, irq_ptr->schid.sch_no,
2557                                 result);
2558                 result = -EIO;
2559                 goto out;
2560         }
2561
2562         resp_code = scsscf_area->response.code;
2563         if (resp_code!=QDIO_CHSC_RESPONSE_CODE_OK) {
2564                 QDIO_PRINT_WARN("response upon setting delay target " \
2565                                 "is 0x%x. Continuing.\n",resp_code);
2566                 sprintf(dbf_text,"sdtR%4x",resp_code);
2567                 QDIO_DBF_TEXT1(0,trace,dbf_text);
2568                 QDIO_DBF_TEXT1(0,setup,dbf_text);
2569                 ptr=&scsscf_area->response;
2570                 QDIO_DBF_HEX2(1,trace,&ptr,QDIO_DBF_TRACE_LEN);
2571         }
2572         QDIO_DBF_TEXT2(0,trace,"delytrgt");
2573         QDIO_DBF_HEX2(0,trace,&delay_target,sizeof(unsigned long));
2574         result = 0; /* not critical */
2575 out:
2576         mempool_free(scsscf_area, qdio_mempool_scssc);
2577         return result;
2578 }
2579
2580 int
2581 qdio_cleanup(struct ccw_device *cdev, int how)
2582 {
2583         struct qdio_irq *irq_ptr;
2584         char dbf_text[15];
2585         int rc;
2586
2587         irq_ptr = cdev->private->qdio_data;
2588         if (!irq_ptr)
2589                 return -ENODEV;
2590
2591         sprintf(dbf_text,"qcln%4x",irq_ptr->schid.sch_no);
2592         QDIO_DBF_TEXT1(0,trace,dbf_text);
2593         QDIO_DBF_TEXT0(0,setup,dbf_text);
2594
2595         rc = qdio_shutdown(cdev, how);
2596         if ((rc == 0) || (rc == -EINPROGRESS))
2597                 rc = qdio_free(cdev);
2598         return rc;
2599 }
2600
2601 int
2602 qdio_shutdown(struct ccw_device *cdev, int how)
2603 {
2604         struct qdio_irq *irq_ptr;
2605         int i;
2606         int result = 0;
2607         int rc;
2608         unsigned long flags;
2609         int timeout;
2610         char dbf_text[15];
2611
2612         irq_ptr = cdev->private->qdio_data;
2613         if (!irq_ptr)
2614                 return -ENODEV;
2615
2616         down(&irq_ptr->setting_up_sema);
2617
2618         sprintf(dbf_text,"qsqs%4x",irq_ptr->schid.sch_no);
2619         QDIO_DBF_TEXT1(0,trace,dbf_text);
2620         QDIO_DBF_TEXT0(0,setup,dbf_text);
2621
2622         /* mark all qs as uninteresting */
2623         for (i=0;i<irq_ptr->no_input_qs;i++)
2624                 atomic_set(&irq_ptr->input_qs[i]->is_in_shutdown,1);
2625
2626         for (i=0;i<irq_ptr->no_output_qs;i++)
2627                 atomic_set(&irq_ptr->output_qs[i]->is_in_shutdown,1);
2628
2629         tasklet_kill(&tiqdio_tasklet);
2630
2631         for (i=0;i<irq_ptr->no_input_qs;i++) {
2632                 qdio_unmark_q(irq_ptr->input_qs[i]);
2633                 tasklet_kill(&irq_ptr->input_qs[i]->tasklet);
2634                 wait_event_interruptible_timeout(cdev->private->wait_q,
2635                                                  !atomic_read(&irq_ptr->
2636                                                               input_qs[i]->
2637                                                               use_count),
2638                                                  QDIO_NO_USE_COUNT_TIMEOUT);
2639                 if (atomic_read(&irq_ptr->input_qs[i]->use_count))
2640                         result=-EINPROGRESS;
2641         }
2642
2643         for (i=0;i<irq_ptr->no_output_qs;i++) {
2644                 tasklet_kill(&irq_ptr->output_qs[i]->tasklet);
2645                 del_timer(&irq_ptr->output_qs[i]->timer);
2646                 wait_event_interruptible_timeout(cdev->private->wait_q,
2647                                                  !atomic_read(&irq_ptr->
2648                                                               output_qs[i]->
2649                                                               use_count),
2650                                                  QDIO_NO_USE_COUNT_TIMEOUT);
2651                 if (atomic_read(&irq_ptr->output_qs[i]->use_count))
2652                         result=-EINPROGRESS;
2653         }
2654
2655         /* cleanup subchannel */
2656         spin_lock_irqsave(get_ccwdev_lock(cdev),flags);
2657         if (how&QDIO_FLAG_CLEANUP_USING_CLEAR) {
2658                 rc = ccw_device_clear(cdev, QDIO_DOING_CLEANUP);
2659                 timeout=QDIO_CLEANUP_CLEAR_TIMEOUT;
2660         } else if (how&QDIO_FLAG_CLEANUP_USING_HALT) {
2661                 rc = ccw_device_halt(cdev, QDIO_DOING_CLEANUP);
2662                 timeout=QDIO_CLEANUP_HALT_TIMEOUT;
2663         } else { /* default behaviour */
2664                 rc = ccw_device_halt(cdev, QDIO_DOING_CLEANUP);
2665                 timeout=QDIO_CLEANUP_HALT_TIMEOUT;
2666         }
2667         if (rc == -ENODEV) {
2668                 /* No need to wait for device no longer present. */
2669                 qdio_set_state(irq_ptr, QDIO_IRQ_STATE_INACTIVE);
2670                 spin_unlock_irqrestore(get_ccwdev_lock(cdev), flags);
2671         } else if (((void *)cdev->handler != (void *)qdio_handler) && rc == 0) {
2672                 /*
2673                  * Whoever put another handler there, has to cope with the
2674                  * interrupt theirself. Might happen if qdio_shutdown was
2675                  * called on already shutdown queues, but this shouldn't have
2676                  * bad side effects.
2677                  */
2678                 qdio_set_state(irq_ptr, QDIO_IRQ_STATE_INACTIVE);
2679                 spin_unlock_irqrestore(get_ccwdev_lock(cdev), flags);
2680         } else if (rc == 0) {
2681                 qdio_set_state(irq_ptr, QDIO_IRQ_STATE_CLEANUP);
2682                 ccw_device_set_timeout(cdev, timeout);
2683                 spin_unlock_irqrestore(get_ccwdev_lock(cdev),flags);
2684
2685                 wait_event(cdev->private->wait_q,
2686                            irq_ptr->state == QDIO_IRQ_STATE_INACTIVE ||
2687                            irq_ptr->state == QDIO_IRQ_STATE_ERR);
2688         } else {
2689                 QDIO_PRINT_INFO("ccw_device_{halt,clear} returned %d for "
2690                                 "device %s\n", result, cdev->dev.bus_id);
2691                 spin_unlock_irqrestore(get_ccwdev_lock(cdev), flags);
2692                 result = rc;
2693                 goto out;
2694         }
2695         if (irq_ptr->is_thinint_irq) {
2696                 qdio_put_indicator((__u32*)irq_ptr->dev_st_chg_ind);
2697                 tiqdio_set_subchannel_ind(irq_ptr,1);
2698                 /* reset adapter interrupt indicators */
2699         }
2700
2701         /* exchange int handlers, if necessary */
2702         if ((void*)cdev->handler == (void*)qdio_handler)
2703                 cdev->handler=irq_ptr->original_int_handler;
2704
2705         /* Ignore errors. */
2706         qdio_set_state(irq_ptr, QDIO_IRQ_STATE_INACTIVE);
2707         ccw_device_set_timeout(cdev, 0);
2708 out:
2709         up(&irq_ptr->setting_up_sema);
2710         return result;
2711 }
2712
2713 int
2714 qdio_free(struct ccw_device *cdev)
2715 {
2716         struct qdio_irq *irq_ptr;
2717         char dbf_text[15];
2718
2719         irq_ptr = cdev->private->qdio_data;
2720         if (!irq_ptr)
2721                 return -ENODEV;
2722
2723         down(&irq_ptr->setting_up_sema);
2724
2725         sprintf(dbf_text,"qfqs%4x",irq_ptr->schid.sch_no);
2726         QDIO_DBF_TEXT1(0,trace,dbf_text);
2727         QDIO_DBF_TEXT0(0,setup,dbf_text);
2728
2729         cdev->private->qdio_data = NULL;
2730
2731         up(&irq_ptr->setting_up_sema);
2732
2733         qdio_release_irq_memory(irq_ptr);
2734         module_put(THIS_MODULE);
2735         return 0;
2736 }
2737
2738 static void
2739 qdio_allocate_do_dbf(struct qdio_initialize *init_data)
2740 {
2741         char dbf_text[20]; /* if a printf printed out more than 8 chars */
2742
2743         sprintf(dbf_text,"qfmt:%x",init_data->q_format);
2744         QDIO_DBF_TEXT0(0,setup,dbf_text);
2745         QDIO_DBF_HEX0(0,setup,init_data->adapter_name,8);
2746         sprintf(dbf_text,"qpff%4x",init_data->qib_param_field_format);
2747         QDIO_DBF_TEXT0(0,setup,dbf_text);
2748         QDIO_DBF_HEX0(0,setup,&init_data->qib_param_field,sizeof(char*));
2749         QDIO_DBF_HEX0(0,setup,&init_data->input_slib_elements,sizeof(long*));
2750         QDIO_DBF_HEX0(0,setup,&init_data->output_slib_elements,sizeof(long*));
2751         sprintf(dbf_text,"miit%4x",init_data->min_input_threshold);
2752         QDIO_DBF_TEXT0(0,setup,dbf_text);
2753         sprintf(dbf_text,"mait%4x",init_data->max_input_threshold);
2754         QDIO_DBF_TEXT0(0,setup,dbf_text);
2755         sprintf(dbf_text,"miot%4x",init_data->min_output_threshold);
2756         QDIO_DBF_TEXT0(0,setup,dbf_text);
2757         sprintf(dbf_text,"maot%4x",init_data->max_output_threshold);
2758         QDIO_DBF_TEXT0(0,setup,dbf_text);
2759         sprintf(dbf_text,"niq:%4x",init_data->no_input_qs);
2760         QDIO_DBF_TEXT0(0,setup,dbf_text);
2761         sprintf(dbf_text,"noq:%4x",init_data->no_output_qs);
2762         QDIO_DBF_TEXT0(0,setup,dbf_text);
2763         QDIO_DBF_HEX0(0,setup,&init_data->input_handler,sizeof(void*));
2764         QDIO_DBF_HEX0(0,setup,&init_data->output_handler,sizeof(void*));
2765         QDIO_DBF_HEX0(0,setup,&init_data->int_parm,sizeof(long));
2766         QDIO_DBF_HEX0(0,setup,&init_data->flags,sizeof(long));
2767         QDIO_DBF_HEX0(0,setup,&init_data->input_sbal_addr_array,sizeof(void*));
2768         QDIO_DBF_HEX0(0,setup,&init_data->output_sbal_addr_array,sizeof(void*));
2769 }
2770
2771 static void
2772 qdio_allocate_fill_input_desc(struct qdio_irq *irq_ptr, int i, int iqfmt)
2773 {
2774         irq_ptr->input_qs[i]->is_iqdio_q = iqfmt;
2775         irq_ptr->input_qs[i]->is_thinint_q = irq_ptr->is_thinint_irq;
2776
2777         irq_ptr->qdr->qdf0[i].sliba=(unsigned long)(irq_ptr->input_qs[i]->slib);
2778
2779         irq_ptr->qdr->qdf0[i].sla=(unsigned long)(irq_ptr->input_qs[i]->sl);
2780
2781         irq_ptr->qdr->qdf0[i].slsba=
2782                 (unsigned long)(&irq_ptr->input_qs[i]->slsb.acc.val[0]);
2783
2784         irq_ptr->qdr->qdf0[i].akey=QDIO_STORAGE_KEY;
2785         irq_ptr->qdr->qdf0[i].bkey=QDIO_STORAGE_KEY;
2786         irq_ptr->qdr->qdf0[i].ckey=QDIO_STORAGE_KEY;
2787         irq_ptr->qdr->qdf0[i].dkey=QDIO_STORAGE_KEY;
2788 }
2789
2790 static void
2791 qdio_allocate_fill_output_desc(struct qdio_irq *irq_ptr, int i,
2792                                int j, int iqfmt)
2793 {
2794         irq_ptr->output_qs[i]->is_iqdio_q = iqfmt;
2795         irq_ptr->output_qs[i]->is_thinint_q = irq_ptr->is_thinint_irq;
2796
2797         irq_ptr->qdr->qdf0[i+j].sliba=(unsigned long)(irq_ptr->output_qs[i]->slib);
2798
2799         irq_ptr->qdr->qdf0[i+j].sla=(unsigned long)(irq_ptr->output_qs[i]->sl);
2800
2801         irq_ptr->qdr->qdf0[i+j].slsba=
2802                 (unsigned long)(&irq_ptr->output_qs[i]->slsb.acc.val[0]);
2803
2804         irq_ptr->qdr->qdf0[i+j].akey=QDIO_STORAGE_KEY;
2805         irq_ptr->qdr->qdf0[i+j].bkey=QDIO_STORAGE_KEY;
2806         irq_ptr->qdr->qdf0[i+j].ckey=QDIO_STORAGE_KEY;
2807         irq_ptr->qdr->qdf0[i+j].dkey=QDIO_STORAGE_KEY;
2808 }
2809
2810
2811 static void
2812 qdio_initialize_set_siga_flags_input(struct qdio_irq *irq_ptr)
2813 {
2814         int i;
2815
2816         for (i=0;i<irq_ptr->no_input_qs;i++) {
2817                 irq_ptr->input_qs[i]->siga_sync=
2818                         irq_ptr->qdioac&CHSC_FLAG_SIGA_SYNC_NECESSARY;
2819                 irq_ptr->input_qs[i]->siga_in=
2820                         irq_ptr->qdioac&CHSC_FLAG_SIGA_INPUT_NECESSARY;
2821                 irq_ptr->input_qs[i]->siga_out=
2822                         irq_ptr->qdioac&CHSC_FLAG_SIGA_OUTPUT_NECESSARY;
2823                 irq_ptr->input_qs[i]->siga_sync_done_on_thinints=
2824                         irq_ptr->qdioac&CHSC_FLAG_SIGA_SYNC_DONE_ON_THININTS;
2825                 irq_ptr->input_qs[i]->hydra_gives_outbound_pcis=
2826                         irq_ptr->hydra_gives_outbound_pcis;
2827                 irq_ptr->input_qs[i]->siga_sync_done_on_outb_tis=
2828                         ((irq_ptr->qdioac&
2829                           (CHSC_FLAG_SIGA_SYNC_DONE_ON_OUTB_PCIS|
2830                            CHSC_FLAG_SIGA_SYNC_DONE_ON_THININTS))==
2831                          (CHSC_FLAG_SIGA_SYNC_DONE_ON_OUTB_PCIS|
2832                           CHSC_FLAG_SIGA_SYNC_DONE_ON_THININTS));
2833
2834         }
2835 }
2836
2837 static void
2838 qdio_initialize_set_siga_flags_output(struct qdio_irq *irq_ptr)
2839 {
2840         int i;
2841
2842         for (i=0;i<irq_ptr->no_output_qs;i++) {
2843                 irq_ptr->output_qs[i]->siga_sync=
2844                         irq_ptr->qdioac&CHSC_FLAG_SIGA_SYNC_NECESSARY;
2845                 irq_ptr->output_qs[i]->siga_in=
2846                         irq_ptr->qdioac&CHSC_FLAG_SIGA_INPUT_NECESSARY;
2847                 irq_ptr->output_qs[i]->siga_out=
2848                         irq_ptr->qdioac&CHSC_FLAG_SIGA_OUTPUT_NECESSARY;
2849                 irq_ptr->output_qs[i]->siga_sync_done_on_thinints=
2850                         irq_ptr->qdioac&CHSC_FLAG_SIGA_SYNC_DONE_ON_THININTS;
2851                 irq_ptr->output_qs[i]->hydra_gives_outbound_pcis=
2852                         irq_ptr->hydra_gives_outbound_pcis;
2853                 irq_ptr->output_qs[i]->siga_sync_done_on_outb_tis=
2854                         ((irq_ptr->qdioac&
2855                           (CHSC_FLAG_SIGA_SYNC_DONE_ON_OUTB_PCIS|
2856                            CHSC_FLAG_SIGA_SYNC_DONE_ON_THININTS))==
2857                          (CHSC_FLAG_SIGA_SYNC_DONE_ON_OUTB_PCIS|
2858                           CHSC_FLAG_SIGA_SYNC_DONE_ON_THININTS));
2859
2860         }
2861 }
2862
2863 static int
2864 qdio_establish_irq_check_for_errors(struct ccw_device *cdev, int cstat,
2865                                     int dstat)
2866 {
2867         char dbf_text[15];
2868         struct qdio_irq *irq_ptr;
2869
2870         irq_ptr = cdev->private->qdio_data;
2871
2872         if (cstat || (dstat & ~(DEV_STAT_CHN_END|DEV_STAT_DEV_END))) {
2873                 sprintf(dbf_text,"ick1%4x",irq_ptr->schid.sch_no);
2874                 QDIO_DBF_TEXT2(1,trace,dbf_text);
2875                 QDIO_DBF_HEX2(0,trace,&dstat,sizeof(int));
2876                 QDIO_DBF_HEX2(0,trace,&cstat,sizeof(int));
2877                 QDIO_PRINT_ERR("received check condition on establish " \
2878                                "queues on irq 0.%x.%x (cs=x%x, ds=x%x).\n",
2879                                irq_ptr->schid.ssid, irq_ptr->schid.sch_no,
2880                                cstat,dstat);
2881                 qdio_set_state(irq_ptr,QDIO_IRQ_STATE_ERR);
2882         }
2883
2884         if (!(dstat & DEV_STAT_DEV_END)) {
2885                 QDIO_DBF_TEXT2(1,setup,"eq:no de");
2886                 QDIO_DBF_HEX2(0,setup,&dstat, sizeof(dstat));
2887                 QDIO_DBF_HEX2(0,setup,&cstat, sizeof(cstat));
2888                 QDIO_PRINT_ERR("establish queues on irq 0.%x.%04x: didn't get "
2889                                "device end: dstat=%02x, cstat=%02x\n",
2890                                irq_ptr->schid.ssid, irq_ptr->schid.sch_no,
2891                                dstat, cstat);
2892                 qdio_set_state(irq_ptr, QDIO_IRQ_STATE_ERR);
2893                 return 1;
2894         }
2895
2896         if (dstat & ~(DEV_STAT_CHN_END|DEV_STAT_DEV_END)) {
2897                 QDIO_DBF_TEXT2(1,setup,"eq:badio");
2898                 QDIO_DBF_HEX2(0,setup,&dstat, sizeof(dstat));
2899                 QDIO_DBF_HEX2(0,setup,&cstat, sizeof(cstat));
2900                 QDIO_PRINT_ERR("establish queues on irq 0.%x.%04x: got "
2901                                "the following devstat: dstat=%02x, "
2902                                "cstat=%02x\n", irq_ptr->schid.ssid,
2903                                irq_ptr->schid.sch_no, dstat, cstat);
2904                 qdio_set_state(irq_ptr, QDIO_IRQ_STATE_ERR);
2905                 return 1;
2906         }
2907         return 0;
2908 }
2909
2910 static void
2911 qdio_establish_handle_irq(struct ccw_device *cdev, int cstat, int dstat)
2912 {
2913         struct qdio_irq *irq_ptr;
2914         char dbf_text[15];
2915
2916         irq_ptr = cdev->private->qdio_data;
2917
2918         sprintf(dbf_text,"qehi%4x",cdev->private->schid.sch_no);
2919         QDIO_DBF_TEXT0(0,setup,dbf_text);
2920         QDIO_DBF_TEXT0(0,trace,dbf_text);
2921
2922         if (qdio_establish_irq_check_for_errors(cdev, cstat, dstat)) {
2923                 ccw_device_set_timeout(cdev, 0);
2924                 return;
2925         }
2926
2927         qdio_set_state(irq_ptr,QDIO_IRQ_STATE_ESTABLISHED);
2928         ccw_device_set_timeout(cdev, 0);
2929 }
2930
2931 int
2932 qdio_initialize(struct qdio_initialize *init_data)
2933 {
2934         int rc;
2935         char dbf_text[15];
2936
2937         sprintf(dbf_text,"qini%4x",init_data->cdev->private->schid.sch_no);
2938         QDIO_DBF_TEXT0(0,setup,dbf_text);
2939         QDIO_DBF_TEXT0(0,trace,dbf_text);
2940
2941         rc = qdio_allocate(init_data);
2942         if (rc == 0) {
2943                 rc = qdio_establish(init_data);
2944                 if (rc != 0)
2945                         qdio_free(init_data->cdev);
2946         }
2947
2948         return rc;
2949 }
2950
2951
2952 int
2953 qdio_allocate(struct qdio_initialize *init_data)
2954 {
2955         struct qdio_irq *irq_ptr;
2956         char dbf_text[15];
2957
2958         sprintf(dbf_text,"qalc%4x",init_data->cdev->private->schid.sch_no);
2959         QDIO_DBF_TEXT0(0,setup,dbf_text);
2960         QDIO_DBF_TEXT0(0,trace,dbf_text);
2961         if ( (init_data->no_input_qs>QDIO_MAX_QUEUES_PER_IRQ) ||
2962              (init_data->no_output_qs>QDIO_MAX_QUEUES_PER_IRQ) ||
2963              ((init_data->no_input_qs) && (!init_data->input_handler)) ||
2964              ((init_data->no_output_qs) && (!init_data->output_handler)) )
2965                 return -EINVAL;
2966
2967         if (!init_data->input_sbal_addr_array)
2968                 return -EINVAL;
2969
2970         if (!init_data->output_sbal_addr_array)
2971                 return -EINVAL;
2972
2973         qdio_allocate_do_dbf(init_data);
2974
2975         /* create irq */
2976         irq_ptr = (void *) get_zeroed_page(GFP_KERNEL | GFP_DMA);
2977
2978         QDIO_DBF_TEXT0(0,setup,"irq_ptr:");
2979         QDIO_DBF_HEX0(0,setup,&irq_ptr,sizeof(void*));
2980
2981         if (!irq_ptr) {
2982                 QDIO_PRINT_ERR("allocation of irq_ptr failed!\n");
2983                 return -ENOMEM;
2984         }
2985
2986         init_MUTEX(&irq_ptr->setting_up_sema);
2987
2988         /* QDR must be in DMA area since CCW data address is only 32 bit */
2989         irq_ptr->qdr = (struct qdr *) __get_free_page(GFP_KERNEL | GFP_DMA);
2990         if (!(irq_ptr->qdr)) {
2991                 free_page((unsigned long) irq_ptr);
2992                 QDIO_PRINT_ERR("allocation of irq_ptr->qdr failed!\n");
2993                 return -ENOMEM;
2994         }
2995         QDIO_DBF_TEXT0(0,setup,"qdr:");
2996         QDIO_DBF_HEX0(0,setup,&irq_ptr->qdr,sizeof(void*));
2997
2998         if (qdio_alloc_qs(irq_ptr,
2999                           init_data->no_input_qs,
3000                           init_data->no_output_qs)) {
3001                 QDIO_PRINT_ERR("queue allocation failed!\n");
3002                 qdio_release_irq_memory(irq_ptr);
3003                 return -ENOMEM;
3004         }
3005
3006         init_data->cdev->private->qdio_data = irq_ptr;
3007
3008         qdio_set_state(irq_ptr,QDIO_IRQ_STATE_INACTIVE);
3009
3010         return 0;
3011 }
3012
3013 static int qdio_fill_irq(struct qdio_initialize *init_data)
3014 {
3015         int i;
3016         char dbf_text[15];
3017         struct ciw *ciw;
3018         int is_iqdio;
3019         struct qdio_irq *irq_ptr;
3020
3021         irq_ptr = init_data->cdev->private->qdio_data;
3022
3023         memset(irq_ptr,0,((char*)&irq_ptr->qdr)-((char*)irq_ptr));
3024
3025         /* wipes qib.ac, required by ar7063 */
3026         memset(irq_ptr->qdr,0,sizeof(struct qdr));
3027
3028         irq_ptr->int_parm=init_data->int_parm;
3029
3030         irq_ptr->schid = ccw_device_get_subchannel_id(init_data->cdev);
3031         irq_ptr->no_input_qs=init_data->no_input_qs;
3032         irq_ptr->no_output_qs=init_data->no_output_qs;
3033
3034         if (init_data->q_format==QDIO_IQDIO_QFMT) {
3035                 irq_ptr->is_iqdio_irq=1;
3036                 irq_ptr->is_thinint_irq=1;
3037         } else {
3038                 irq_ptr->is_iqdio_irq=0;
3039                 irq_ptr->is_thinint_irq=hydra_thinints;
3040         }
3041         sprintf(dbf_text,"is_i_t%1x%1x",
3042                 irq_ptr->is_iqdio_irq,irq_ptr->is_thinint_irq);
3043         QDIO_DBF_TEXT2(0,setup,dbf_text);
3044
3045         if (irq_ptr->is_thinint_irq) {
3046                 irq_ptr->dev_st_chg_ind = qdio_get_indicator();
3047                 QDIO_DBF_HEX1(0,setup,&irq_ptr->dev_st_chg_ind,sizeof(void*));
3048                 if (!irq_ptr->dev_st_chg_ind) {
3049                         QDIO_PRINT_WARN("no indicator location available " \
3050                                         "for irq 0.%x.%x\n",
3051                                         irq_ptr->schid.ssid, irq_ptr->schid.sch_no);
3052                         qdio_release_irq_memory(irq_ptr);
3053                         return -ENOBUFS;
3054                 }
3055         }
3056
3057         /* defaults */
3058         irq_ptr->equeue.cmd=DEFAULT_ESTABLISH_QS_CMD;
3059         irq_ptr->equeue.count=DEFAULT_ESTABLISH_QS_COUNT;
3060         irq_ptr->aqueue.cmd=DEFAULT_ACTIVATE_QS_CMD;
3061         irq_ptr->aqueue.count=DEFAULT_ACTIVATE_QS_COUNT;
3062
3063         qdio_fill_qs(irq_ptr, init_data->cdev,
3064                      init_data->no_input_qs,
3065                      init_data->no_output_qs,
3066                      init_data->input_handler,
3067                      init_data->output_handler,init_data->int_parm,
3068                      init_data->q_format,init_data->flags,
3069                      init_data->input_sbal_addr_array,
3070                      init_data->output_sbal_addr_array);
3071
3072         if (!try_module_get(THIS_MODULE)) {
3073                 QDIO_PRINT_CRIT("try_module_get() failed!\n");
3074                 qdio_release_irq_memory(irq_ptr);
3075                 return -EINVAL;
3076         }
3077
3078         qdio_fill_thresholds(irq_ptr,init_data->no_input_qs,
3079                              init_data->no_output_qs,
3080                              init_data->min_input_threshold,
3081                              init_data->max_input_threshold,
3082                              init_data->min_output_threshold,
3083                              init_data->max_output_threshold);
3084
3085         /* fill in qdr */
3086         irq_ptr->qdr->qfmt=init_data->q_format;
3087         irq_ptr->qdr->iqdcnt=init_data->no_input_qs;
3088         irq_ptr->qdr->oqdcnt=init_data->no_output_qs;
3089         irq_ptr->qdr->iqdsz=sizeof(struct qdesfmt0)/4; /* size in words */
3090         irq_ptr->qdr->oqdsz=sizeof(struct qdesfmt0)/4;
3091
3092         irq_ptr->qdr->qiba=(unsigned long)&irq_ptr->qib;
3093         irq_ptr->qdr->qkey=QDIO_STORAGE_KEY;
3094
3095         /* fill in qib */
3096         irq_ptr->is_qebsm = is_passthrough;
3097         if (irq_ptr->is_qebsm)
3098                 irq_ptr->qib.rflags |= QIB_RFLAGS_ENABLE_QEBSM;
3099
3100         irq_ptr->qib.qfmt=init_data->q_format;
3101         if (init_data->no_input_qs)
3102                 irq_ptr->qib.isliba=(unsigned long)(irq_ptr->input_qs[0]->slib);
3103         if (init_data->no_output_qs)
3104                 irq_ptr->qib.osliba=(unsigned long)(irq_ptr->output_qs[0]->slib);
3105         memcpy(irq_ptr->qib.ebcnam,init_data->adapter_name,8);
3106
3107         qdio_set_impl_params(irq_ptr,init_data->qib_param_field_format,
3108                              init_data->qib_param_field,
3109                              init_data->no_input_qs,
3110                              init_data->no_output_qs,
3111                              init_data->input_slib_elements,
3112                              init_data->output_slib_elements);
3113
3114         /* first input descriptors, then output descriptors */
3115         is_iqdio = (init_data->q_format == QDIO_IQDIO_QFMT) ? 1 : 0;
3116         for (i=0;i<init_data->no_input_qs;i++)
3117                 qdio_allocate_fill_input_desc(irq_ptr, i, is_iqdio);
3118
3119         for (i=0;i<init_data->no_output_qs;i++)
3120                 qdio_allocate_fill_output_desc(irq_ptr, i,
3121                                                init_data->no_input_qs,
3122                                                is_iqdio);
3123
3124         /* qdr, qib, sls, slsbs, slibs, sbales filled. */
3125
3126         /* get qdio commands */
3127         ciw = ccw_device_get_ciw(init_data->cdev, CIW_TYPE_EQUEUE);
3128         if (!ciw) {
3129                 QDIO_DBF_TEXT2(1,setup,"no eq");
3130                 QDIO_PRINT_INFO("No equeue CIW found for QDIO commands. "
3131                                 "Trying to use default.\n");
3132         } else
3133                 irq_ptr->equeue = *ciw;
3134         ciw = ccw_device_get_ciw(init_data->cdev, CIW_TYPE_AQUEUE);
3135         if (!ciw) {
3136                 QDIO_DBF_TEXT2(1,setup,"no aq");
3137                 QDIO_PRINT_INFO("No aqueue CIW found for QDIO commands. "
3138                                 "Trying to use default.\n");
3139         } else
3140                 irq_ptr->aqueue = *ciw;
3141
3142         /* Set new interrupt handler. */
3143         irq_ptr->original_int_handler = init_data->cdev->handler;
3144         init_data->cdev->handler = qdio_handler;
3145
3146         return 0;
3147 }
3148
3149 int
3150 qdio_establish(struct qdio_initialize *init_data)
3151 {
3152         struct qdio_irq *irq_ptr;
3153         unsigned long saveflags;
3154         int result, result2;
3155         struct ccw_device *cdev;
3156         char dbf_text[20];
3157
3158         cdev=init_data->cdev;
3159         irq_ptr = cdev->private->qdio_data;
3160         if (!irq_ptr)
3161                 return -EINVAL;
3162
3163         if (cdev->private->state != DEV_STATE_ONLINE)
3164                 return -EINVAL;
3165
3166         down(&irq_ptr->setting_up_sema);
3167
3168         qdio_fill_irq(init_data);
3169
3170         /* the thinint CHSC stuff */
3171         if (irq_ptr->is_thinint_irq) {
3172
3173                 result = tiqdio_set_subchannel_ind(irq_ptr,0);
3174                 if (result) {
3175                         up(&irq_ptr->setting_up_sema);
3176                         qdio_shutdown(cdev, QDIO_FLAG_CLEANUP_USING_CLEAR);
3177                         return result;
3178                 }
3179                 tiqdio_set_delay_target(irq_ptr,TIQDIO_DELAY_TARGET);
3180         }
3181
3182         sprintf(dbf_text,"qest%4x",cdev->private->schid.sch_no);
3183         QDIO_DBF_TEXT0(0,setup,dbf_text);
3184         QDIO_DBF_TEXT0(0,trace,dbf_text);
3185
3186         /* establish q */
3187         irq_ptr->ccw.cmd_code=irq_ptr->equeue.cmd;
3188         irq_ptr->ccw.flags=CCW_FLAG_SLI;
3189         irq_ptr->ccw.count=irq_ptr->equeue.count;
3190         irq_ptr->ccw.cda=QDIO_GET_ADDR(irq_ptr->qdr);
3191
3192         spin_lock_irqsave(get_ccwdev_lock(cdev),saveflags);
3193
3194         ccw_device_set_options_mask(cdev, 0);
3195         result=ccw_device_start_timeout(cdev,&irq_ptr->ccw,
3196                                         QDIO_DOING_ESTABLISH,0, 0,
3197                                         QDIO_ESTABLISH_TIMEOUT);
3198         if (result) {
3199                 result2=ccw_device_start_timeout(cdev,&irq_ptr->ccw,
3200                                                  QDIO_DOING_ESTABLISH,0,0,
3201                                                  QDIO_ESTABLISH_TIMEOUT);
3202                 sprintf(dbf_text,"eq:io%4x",result);
3203                 QDIO_DBF_TEXT2(1,setup,dbf_text);
3204                 if (result2) {
3205                         sprintf(dbf_text,"eq:io%4x",result);
3206                         QDIO_DBF_TEXT2(1,setup,dbf_text);
3207                 }
3208                 QDIO_PRINT_WARN("establish queues on irq 0.%x.%04x: do_IO " \
3209                                 "returned %i, next try returned %i\n",
3210                                 irq_ptr->schid.ssid, irq_ptr->schid.sch_no,
3211                                 result, result2);
3212                 result=result2;
3213                 if (result)
3214                         ccw_device_set_timeout(cdev, 0);
3215         }
3216
3217         spin_unlock_irqrestore(get_ccwdev_lock(cdev),saveflags);
3218
3219         if (result) {
3220                 up(&irq_ptr->setting_up_sema);
3221                 qdio_shutdown(cdev,QDIO_FLAG_CLEANUP_USING_CLEAR);
3222                 return result;
3223         }
3224
3225         /* Timeout is cared for already by using ccw_device_start_timeout(). */
3226         wait_event_interruptible(cdev->private->wait_q,
3227                  irq_ptr->state == QDIO_IRQ_STATE_ESTABLISHED ||
3228                  irq_ptr->state == QDIO_IRQ_STATE_ERR);
3229
3230         if (irq_ptr->state == QDIO_IRQ_STATE_ESTABLISHED)
3231                 result = 0;
3232         else {
3233                 up(&irq_ptr->setting_up_sema);
3234                 qdio_shutdown(cdev, QDIO_FLAG_CLEANUP_USING_CLEAR);
3235                 return -EIO;
3236         }
3237
3238         qdio_get_ssqd_information(irq_ptr);
3239         /* if this gets set once, we're running under VM and can omit SVSes */
3240         if (irq_ptr->qdioac&CHSC_FLAG_SIGA_SYNC_NECESSARY)
3241                 omit_svs=1;
3242
3243         sprintf(dbf_text,"qdioac%2x",irq_ptr->qdioac);
3244         QDIO_DBF_TEXT2(0,setup,dbf_text);
3245
3246         sprintf(dbf_text,"qib ac%2x",irq_ptr->qib.ac);
3247         QDIO_DBF_TEXT2(0,setup,dbf_text);
3248
3249         irq_ptr->hydra_gives_outbound_pcis=
3250                 irq_ptr->qib.ac&QIB_AC_OUTBOUND_PCI_SUPPORTED;
3251         irq_ptr->sync_done_on_outb_pcis=
3252                 irq_ptr->qdioac&CHSC_FLAG_SIGA_SYNC_DONE_ON_OUTB_PCIS;
3253
3254         qdio_initialize_set_siga_flags_input(irq_ptr);
3255         qdio_initialize_set_siga_flags_output(irq_ptr);
3256
3257         up(&irq_ptr->setting_up_sema);
3258
3259         return result;
3260
3261 }
3262
3263 int
3264 qdio_activate(struct ccw_device *cdev, int flags)
3265 {
3266         struct qdio_irq *irq_ptr;
3267         int i,result=0,result2;
3268         unsigned long saveflags;
3269         char dbf_text[20]; /* see qdio_initialize */
3270
3271         irq_ptr = cdev->private->qdio_data;
3272         if (!irq_ptr)
3273                 return -ENODEV;
3274
3275         if (cdev->private->state != DEV_STATE_ONLINE)
3276                 return -EINVAL;
3277
3278         down(&irq_ptr->setting_up_sema);
3279         if (irq_ptr->state==QDIO_IRQ_STATE_INACTIVE) {
3280                 result=-EBUSY;
3281                 goto out;
3282         }
3283
3284         sprintf(dbf_text,"qact%4x", irq_ptr->schid.sch_no);
3285         QDIO_DBF_TEXT2(0,setup,dbf_text);
3286         QDIO_DBF_TEXT2(0,trace,dbf_text);
3287
3288         /* activate q */
3289         irq_ptr->ccw.cmd_code=irq_ptr->aqueue.cmd;
3290         irq_ptr->ccw.flags=CCW_FLAG_SLI;
3291         irq_ptr->ccw.count=irq_ptr->aqueue.count;
3292         irq_ptr->ccw.cda=QDIO_GET_ADDR(0);
3293
3294         spin_lock_irqsave(get_ccwdev_lock(cdev),saveflags);
3295
3296         ccw_device_set_timeout(cdev, 0);
3297         ccw_device_set_options(cdev, CCWDEV_REPORT_ALL);
3298         result=ccw_device_start(cdev,&irq_ptr->ccw,QDIO_DOING_ACTIVATE,
3299                                 0, DOIO_DENY_PREFETCH);
3300         if (result) {
3301                 result2=ccw_device_start(cdev,&irq_ptr->ccw,
3302                                          QDIO_DOING_ACTIVATE,0,0);
3303                 sprintf(dbf_text,"aq:io%4x",result);
3304                 QDIO_DBF_TEXT2(1,setup,dbf_text);
3305                 if (result2) {
3306                         sprintf(dbf_text,"aq:io%4x",result);
3307                         QDIO_DBF_TEXT2(1,setup,dbf_text);
3308                 }
3309                 QDIO_PRINT_WARN("activate queues on irq 0.%x.%04x: do_IO " \
3310                                 "returned %i, next try returned %i\n",
3311                                 irq_ptr->schid.ssid, irq_ptr->schid.sch_no,
3312                                 result, result2);
3313                 result=result2;
3314         }
3315
3316         spin_unlock_irqrestore(get_ccwdev_lock(cdev),saveflags);
3317         if (result)
3318                 goto out;
3319
3320         for (i=0;i<irq_ptr->no_input_qs;i++) {
3321                 if (irq_ptr->is_thinint_irq) {
3322                         /*
3323                          * that way we know, that, if we will get interrupted
3324                          * by tiqdio_inbound_processing, qdio_unmark_q will
3325                          * not be called
3326                          */
3327                         qdio_reserve_q(irq_ptr->input_qs[i]);
3328                         qdio_mark_tiq(irq_ptr->input_qs[i]);
3329                         qdio_release_q(irq_ptr->input_qs[i]);
3330                 }
3331         }
3332
3333         if (flags&QDIO_FLAG_NO_INPUT_INTERRUPT_CONTEXT) {
3334                 for (i=0;i<irq_ptr->no_input_qs;i++) {
3335                         irq_ptr->input_qs[i]->is_input_q|=
3336                                 QDIO_FLAG_NO_INPUT_INTERRUPT_CONTEXT;
3337                 }
3338         }
3339
3340         wait_event_interruptible_timeout(cdev->private->wait_q,
3341                                          ((irq_ptr->state ==
3342                                           QDIO_IRQ_STATE_STOPPED) ||
3343                                           (irq_ptr->state ==
3344                                            QDIO_IRQ_STATE_ERR)),
3345                                          QDIO_ACTIVATE_TIMEOUT);
3346
3347         switch (irq_ptr->state) {
3348         case QDIO_IRQ_STATE_STOPPED:
3349         case QDIO_IRQ_STATE_ERR:
3350                 up(&irq_ptr->setting_up_sema);
3351                 qdio_shutdown(cdev, QDIO_FLAG_CLEANUP_USING_CLEAR);
3352                 down(&irq_ptr->setting_up_sema);
3353                 result = -EIO;
3354                 break;
3355         default:
3356                 qdio_set_state(irq_ptr, QDIO_IRQ_STATE_ACTIVE);
3357                 result = 0;
3358         }
3359  out:
3360         up(&irq_ptr->setting_up_sema);
3361
3362         return result;
3363 }
3364
3365 /* buffers filled forwards again to make Rick happy */
3366 static void
3367 qdio_do_qdio_fill_input(struct qdio_q *q, unsigned int qidx,
3368                         unsigned int count, struct qdio_buffer *buffers)
3369 {
3370         struct qdio_irq *irq = (struct qdio_irq *) q->irq_ptr;
3371         int tmp = 0;
3372
3373         qidx &= (QDIO_MAX_BUFFERS_PER_Q - 1);
3374         if (irq->is_qebsm) {
3375                 while (count) {
3376                         tmp = set_slsb(q, &qidx, SLSB_CU_INPUT_EMPTY, &count);
3377                         if (!tmp)
3378                                 return;
3379                 }
3380                 return;
3381         }
3382         for (;;) {
3383                 set_slsb(q, &qidx, SLSB_CU_INPUT_EMPTY, &count);
3384                 count--;
3385                 if (!count) break;
3386                 qidx = (qidx + 1) & (QDIO_MAX_BUFFERS_PER_Q - 1);
3387         }
3388 }
3389
3390 static void
3391 qdio_do_qdio_fill_output(struct qdio_q *q, unsigned int qidx,
3392                          unsigned int count, struct qdio_buffer *buffers)
3393 {
3394         struct qdio_irq *irq = (struct qdio_irq *) q->irq_ptr;
3395         int tmp = 0;
3396
3397         qidx &= (QDIO_MAX_BUFFERS_PER_Q - 1);
3398         if (irq->is_qebsm) {
3399                 while (count) {
3400                         tmp = set_slsb(q, &qidx, SLSB_CU_OUTPUT_PRIMED, &count);
3401                         if (!tmp)
3402                                 return;
3403                 }
3404                 return;
3405         }
3406
3407         for (;;) {
3408                 set_slsb(q, &qidx, SLSB_CU_OUTPUT_PRIMED, &count);
3409                 count--;
3410                 if (!count) break;
3411                 qidx = (qidx + 1) & (QDIO_MAX_BUFFERS_PER_Q - 1);
3412         }
3413 }
3414
3415 static void
3416 do_qdio_handle_inbound(struct qdio_q *q, unsigned int callflags,
3417                        unsigned int qidx, unsigned int count,
3418                        struct qdio_buffer *buffers)
3419 {
3420         int used_elements;
3421
3422         /* This is the inbound handling of queues */
3423         used_elements=atomic_add_return(count, &q->number_of_buffers_used) - count;
3424
3425         qdio_do_qdio_fill_input(q,qidx,count,buffers);
3426
3427         if ((used_elements+count==QDIO_MAX_BUFFERS_PER_Q)&&
3428             (callflags&QDIO_FLAG_UNDER_INTERRUPT))
3429                 atomic_xchg(&q->polling,0);
3430
3431         if (used_elements)
3432                 return;
3433         if (callflags&QDIO_FLAG_DONT_SIGA)
3434                 return;
3435         if (q->siga_in) {
3436                 int result;
3437
3438                 result=qdio_siga_input(q);
3439                 if (result) {
3440                         if (q->siga_error)
3441                                 q->error_status_flags|=
3442                                         QDIO_STATUS_MORE_THAN_ONE_SIGA_ERROR;
3443                         q->error_status_flags|=QDIO_STATUS_LOOK_FOR_ERROR;
3444                         q->siga_error=result;
3445                 }
3446         }
3447
3448         qdio_mark_q(q);
3449 }
3450
3451 static void
3452 do_qdio_handle_outbound(struct qdio_q *q, unsigned int callflags,
3453                         unsigned int qidx, unsigned int count,
3454                         struct qdio_buffer *buffers)
3455 {
3456         int used_elements;
3457         unsigned int cnt, start_buf;
3458         unsigned char state = 0;
3459         struct qdio_irq *irq = (struct qdio_irq *) q->irq_ptr;
3460
3461         /* This is the outbound handling of queues */
3462         qdio_do_qdio_fill_output(q,qidx,count,buffers);
3463
3464         used_elements=atomic_add_return(count, &q->number_of_buffers_used) - count;
3465
3466         if (callflags&QDIO_FLAG_DONT_SIGA) {
3467                 qdio_perf_stat_inc(&perf_stats.outbound_cnt);
3468                 return;
3469         }
3470         if (callflags & QDIO_FLAG_PCI_OUT)
3471                 q->is_pci_out = 1;
3472         else
3473                 q->is_pci_out = 0;
3474         if (q->is_iqdio_q) {
3475                 /* one siga for every sbal */
3476                 while (count--)
3477                         qdio_kick_outbound_q(q);
3478
3479                 __qdio_outbound_processing(q);
3480         } else {
3481                 /* under VM, we do a SIGA sync unconditionally */
3482                 SYNC_MEMORY;
3483                 else {
3484                         /*
3485                          * w/o shadow queues (else branch of
3486                          * SYNC_MEMORY :-/ ), we try to
3487                          * fast-requeue buffers
3488                          */
3489                         if (irq->is_qebsm) {
3490                                 cnt = 1;
3491                                 start_buf = ((qidx+QDIO_MAX_BUFFERS_PER_Q-1) &
3492                                              (QDIO_MAX_BUFFERS_PER_Q-1));
3493                                 qdio_do_eqbs(q, &state, &start_buf, &cnt);
3494                         } else
3495                                 state = q->slsb.acc.val[(qidx+QDIO_MAX_BUFFERS_PER_Q-1)
3496                                         &(QDIO_MAX_BUFFERS_PER_Q-1) ];
3497                          if (state != SLSB_CU_OUTPUT_PRIMED) {
3498                                 qdio_kick_outbound_q(q);
3499                         } else {
3500                                 QDIO_DBF_TEXT3(0,trace, "fast-req");
3501                                 qdio_perf_stat_inc(&perf_stats.fast_reqs);
3502                         }
3503                 }
3504                 /*
3505                  * only marking the q could take too long,
3506                  * the upper layer module could do a lot of
3507                  * traffic in that time
3508                  */
3509                 __qdio_outbound_processing(q);
3510         }
3511
3512         qdio_perf_stat_inc(&perf_stats.outbound_cnt);
3513 }
3514
3515 /* count must be 1 in iqdio */
3516 int
3517 do_QDIO(struct ccw_device *cdev,unsigned int callflags,
3518         unsigned int queue_number, unsigned int qidx,
3519         unsigned int count,struct qdio_buffer *buffers)
3520 {
3521         struct qdio_irq *irq_ptr;
3522 #ifdef CONFIG_QDIO_DEBUG
3523         char dbf_text[20];
3524
3525         sprintf(dbf_text,"doQD%04x",cdev->private->schid.sch_no);
3526         QDIO_DBF_TEXT3(0,trace,dbf_text);
3527 #endif /* CONFIG_QDIO_DEBUG */
3528
3529         if ( (qidx>QDIO_MAX_BUFFERS_PER_Q) ||
3530              (count>QDIO_MAX_BUFFERS_PER_Q) ||
3531              (queue_number>QDIO_MAX_QUEUES_PER_IRQ) )
3532                 return -EINVAL;
3533
3534         if (count==0)
3535                 return 0;
3536
3537         irq_ptr = cdev->private->qdio_data;
3538         if (!irq_ptr)
3539                 return -ENODEV;
3540
3541 #ifdef CONFIG_QDIO_DEBUG
3542         if (callflags&QDIO_FLAG_SYNC_INPUT)
3543                 QDIO_DBF_HEX3(0,trace,&irq_ptr->input_qs[queue_number],
3544                               sizeof(void*));
3545         else
3546                 QDIO_DBF_HEX3(0,trace,&irq_ptr->output_qs[queue_number],
3547                               sizeof(void*));
3548         sprintf(dbf_text,"flag%04x",callflags);
3549         QDIO_DBF_TEXT3(0,trace,dbf_text);
3550         sprintf(dbf_text,"qi%02xct%02x",qidx,count);
3551         QDIO_DBF_TEXT3(0,trace,dbf_text);
3552 #endif /* CONFIG_QDIO_DEBUG */
3553
3554         if (irq_ptr->state!=QDIO_IRQ_STATE_ACTIVE)
3555                 return -EBUSY;
3556
3557         if (callflags&QDIO_FLAG_SYNC_INPUT)
3558                 do_qdio_handle_inbound(irq_ptr->input_qs[queue_number],
3559                                        callflags, qidx, count, buffers);
3560         else if (callflags&QDIO_FLAG_SYNC_OUTPUT)
3561                 do_qdio_handle_outbound(irq_ptr->output_qs[queue_number],
3562                                         callflags, qidx, count, buffers);
3563         else {
3564                 QDIO_DBF_TEXT3(1,trace,"doQD:inv");
3565                 return -EINVAL;
3566         }
3567         return 0;
3568 }
3569
3570 static int
3571 qdio_perf_procfile_read(char *buffer, char **buffer_location, off_t offset,
3572                         int buffer_length, int *eof, void *data)
3573 {
3574         int c=0;
3575
3576         /* we are always called with buffer_length=4k, so we all
3577            deliver on the first read */
3578         if (offset>0)
3579                 return 0;
3580
3581 #define _OUTP_IT(x...) c+=sprintf(buffer+c,x)
3582 #ifdef CONFIG_64BIT
3583         _OUTP_IT("Number of tasklet runs (total)                  : %li\n",
3584                  (long)atomic64_read(&perf_stats.tl_runs));
3585         _OUTP_IT("Inbound tasklet runs      tried/retried         : %li/%li\n",
3586                  (long)atomic64_read(&perf_stats.inbound_tl_runs),
3587                  (long)atomic64_read(&perf_stats.inbound_tl_runs_resched));
3588         _OUTP_IT("Inbound-thin tasklet runs tried/retried         : %li/%li\n",
3589                  (long)atomic64_read(&perf_stats.inbound_thin_tl_runs),
3590                  (long)atomic64_read(&perf_stats.inbound_thin_tl_runs_resched));
3591         _OUTP_IT("Outbound tasklet runs     tried/retried         : %li/%li\n",
3592                  (long)atomic64_read(&perf_stats.outbound_tl_runs),
3593                  (long)atomic64_read(&perf_stats.outbound_tl_runs_resched));
3594         _OUTP_IT("\n");
3595         _OUTP_IT("Number of SIGA sync's issued                    : %li\n",
3596                  (long)atomic64_read(&perf_stats.siga_syncs));
3597         _OUTP_IT("Number of SIGA in's issued                      : %li\n",
3598                  (long)atomic64_read(&perf_stats.siga_ins));
3599         _OUTP_IT("Number of SIGA out's issued                     : %li\n",
3600                  (long)atomic64_read(&perf_stats.siga_outs));
3601         _OUTP_IT("Number of PCIs caught                           : %li\n",
3602                  (long)atomic64_read(&perf_stats.pcis));
3603         _OUTP_IT("Number of adapter interrupts caught             : %li\n",
3604                  (long)atomic64_read(&perf_stats.thinints));
3605         _OUTP_IT("Number of fast requeues (outg. SBALs w/o SIGA)  : %li\n",
3606                  (long)atomic64_read(&perf_stats.fast_reqs));
3607         _OUTP_IT("\n");
3608         _OUTP_IT("Number of inbound transfers                     : %li\n",
3609                  (long)atomic64_read(&perf_stats.inbound_cnt));
3610         _OUTP_IT("Number of do_QDIOs outbound                     : %li\n",
3611                  (long)atomic64_read(&perf_stats.outbound_cnt));
3612 #else /* CONFIG_64BIT */
3613         _OUTP_IT("Number of tasklet runs (total)                  : %i\n",
3614                  atomic_read(&perf_stats.tl_runs));
3615         _OUTP_IT("Inbound tasklet runs      tried/retried         : %i/%i\n",
3616                  atomic_read(&perf_stats.inbound_tl_runs),
3617                  atomic_read(&perf_stats.inbound_tl_runs_resched));
3618         _OUTP_IT("Inbound-thin tasklet runs tried/retried         : %i/%i\n",
3619                  atomic_read(&perf_stats.inbound_thin_tl_runs),
3620                  atomic_read(&perf_stats.inbound_thin_tl_runs_resched));
3621         _OUTP_IT("Outbound tasklet runs     tried/retried         : %i/%i\n",
3622                  atomic_read(&perf_stats.outbound_tl_runs),
3623                  atomic_read(&perf_stats.outbound_tl_runs_resched));
3624         _OUTP_IT("\n");
3625         _OUTP_IT("Number of SIGA sync's issued                    : %i\n",
3626                  atomic_read(&perf_stats.siga_syncs));
3627         _OUTP_IT("Number of SIGA in's issued                      : %i\n",
3628                  atomic_read(&perf_stats.siga_ins));
3629         _OUTP_IT("Number of SIGA out's issued                     : %i\n",
3630                  atomic_read(&perf_stats.siga_outs));
3631         _OUTP_IT("Number of PCIs caught                           : %i\n",
3632                  atomic_read(&perf_stats.pcis));
3633         _OUTP_IT("Number of adapter interrupts caught             : %i\n",
3634                  atomic_read(&perf_stats.thinints));
3635         _OUTP_IT("Number of fast requeues (outg. SBALs w/o SIGA)  : %i\n",
3636                  atomic_read(&perf_stats.fast_reqs));
3637         _OUTP_IT("\n");
3638         _OUTP_IT("Number of inbound transfers                     : %i\n",
3639                  atomic_read(&perf_stats.inbound_cnt));
3640         _OUTP_IT("Number of do_QDIOs outbound                     : %i\n",
3641                  atomic_read(&perf_stats.outbound_cnt));
3642 #endif /* CONFIG_64BIT */
3643         _OUTP_IT("\n");
3644
3645         return c;
3646 }
3647
3648 static struct proc_dir_entry *qdio_perf_proc_file;
3649
3650 static void
3651 qdio_add_procfs_entry(void)
3652 {
3653         proc_perf_file_registration=0;
3654         qdio_perf_proc_file=create_proc_entry(QDIO_PERF,
3655                                               S_IFREG|0444,&proc_root);
3656         if (qdio_perf_proc_file) {
3657                 qdio_perf_proc_file->read_proc=&qdio_perf_procfile_read;
3658         } else proc_perf_file_registration=-1;
3659
3660         if (proc_perf_file_registration)
3661                 QDIO_PRINT_WARN("was not able to register perf. " \
3662                                 "proc-file (%i).\n",
3663                                 proc_perf_file_registration);
3664 }
3665
3666 static void
3667 qdio_remove_procfs_entry(void)
3668 {
3669         if (!proc_perf_file_registration) /* means if it went ok earlier */
3670                 remove_proc_entry(QDIO_PERF,&proc_root);
3671 }
3672
3673 /**
3674  * attributes in sysfs
3675  *****************************************************************************/
3676
3677 static ssize_t
3678 qdio_performance_stats_show(struct bus_type *bus, char *buf)
3679 {
3680         return sprintf(buf, "%i\n", qdio_performance_stats ? 1 : 0);
3681 }
3682
3683 static ssize_t
3684 qdio_performance_stats_store(struct bus_type *bus, const char *buf, size_t count)
3685 {
3686         char *tmp;
3687         int i;
3688
3689         i = simple_strtoul(buf, &tmp, 16);
3690         if ((i == 0) || (i == 1)) {
3691                 if (i == qdio_performance_stats)
3692                         return count;
3693                 qdio_performance_stats = i;
3694                 if (i==0) {
3695                         /* reset perf. stat. info */
3696 #ifdef CONFIG_64BIT
3697                         atomic64_set(&perf_stats.tl_runs, 0);
3698                         atomic64_set(&perf_stats.outbound_tl_runs, 0);
3699                         atomic64_set(&perf_stats.inbound_tl_runs, 0);
3700                         atomic64_set(&perf_stats.inbound_tl_runs_resched, 0);
3701                         atomic64_set(&perf_stats.inbound_thin_tl_runs, 0);
3702                         atomic64_set(&perf_stats.inbound_thin_tl_runs_resched,
3703                                      0);
3704                         atomic64_set(&perf_stats.siga_outs, 0);
3705                         atomic64_set(&perf_stats.siga_ins, 0);
3706                         atomic64_set(&perf_stats.siga_syncs, 0);
3707                         atomic64_set(&perf_stats.pcis, 0);
3708                         atomic64_set(&perf_stats.thinints, 0);
3709                         atomic64_set(&perf_stats.fast_reqs, 0);
3710                         atomic64_set(&perf_stats.outbound_cnt, 0);
3711                         atomic64_set(&perf_stats.inbound_cnt, 0);
3712 #else /* CONFIG_64BIT */
3713                         atomic_set(&perf_stats.tl_runs, 0);
3714                         atomic_set(&perf_stats.outbound_tl_runs, 0);
3715                         atomic_set(&perf_stats.inbound_tl_runs, 0);
3716                         atomic_set(&perf_stats.inbound_tl_runs_resched, 0);
3717                         atomic_set(&perf_stats.inbound_thin_tl_runs, 0);
3718                         atomic_set(&perf_stats.inbound_thin_tl_runs_resched, 0);
3719                         atomic_set(&perf_stats.siga_outs, 0);
3720                         atomic_set(&perf_stats.siga_ins, 0);
3721                         atomic_set(&perf_stats.siga_syncs, 0);
3722                         atomic_set(&perf_stats.pcis, 0);
3723                         atomic_set(&perf_stats.thinints, 0);
3724                         atomic_set(&perf_stats.fast_reqs, 0);
3725                         atomic_set(&perf_stats.outbound_cnt, 0);
3726                         atomic_set(&perf_stats.inbound_cnt, 0);
3727 #endif /* CONFIG_64BIT */
3728                 }
3729         } else {
3730                 QDIO_PRINT_ERR("QDIO performance_stats: write 0 or 1 to this file!\n");
3731                 return -EINVAL;
3732         }
3733         return count;
3734 }
3735
3736 static BUS_ATTR(qdio_performance_stats, 0644, qdio_performance_stats_show,
3737                         qdio_performance_stats_store);
3738
3739 static void
3740 tiqdio_register_thinints(void)
3741 {
3742         char dbf_text[20];
3743         register_thinint_result=
3744                 s390_register_adapter_interrupt(&tiqdio_thinint_handler);
3745         if (register_thinint_result) {
3746                 sprintf(dbf_text,"regthn%x",(register_thinint_result&0xff));
3747                 QDIO_DBF_TEXT0(0,setup,dbf_text);
3748                 QDIO_PRINT_ERR("failed to register adapter handler " \
3749                                "(rc=%i).\nAdapter interrupts might " \
3750                                "not work. Continuing.\n",
3751                                register_thinint_result);
3752         }
3753 }
3754
3755 static void
3756 tiqdio_unregister_thinints(void)
3757 {
3758         if (!register_thinint_result)
3759                 s390_unregister_adapter_interrupt(&tiqdio_thinint_handler);
3760 }
3761
3762 static int
3763 qdio_get_qdio_memory(void)
3764 {
3765         int i;
3766         indicator_used[0]=1;
3767
3768         for (i=1;i<INDICATORS_PER_CACHELINE;i++)
3769                 indicator_used[i]=0;
3770         indicators = kzalloc(sizeof(__u32)*(INDICATORS_PER_CACHELINE),
3771                                    GFP_KERNEL);
3772         if (!indicators)
3773                 return -ENOMEM;
3774         return 0;
3775 }
3776
3777 static void
3778 qdio_release_qdio_memory(void)
3779 {
3780         kfree(indicators);
3781 }
3782
3783
3784 static void
3785 qdio_unregister_dbf_views(void)
3786 {
3787         if (qdio_dbf_setup)
3788                 debug_unregister(qdio_dbf_setup);
3789         if (qdio_dbf_sbal)
3790                 debug_unregister(qdio_dbf_sbal);
3791         if (qdio_dbf_sense)
3792                 debug_unregister(qdio_dbf_sense);
3793         if (qdio_dbf_trace)
3794                 debug_unregister(qdio_dbf_trace);
3795 #ifdef CONFIG_QDIO_DEBUG
3796         if (qdio_dbf_slsb_out)
3797                 debug_unregister(qdio_dbf_slsb_out);
3798         if (qdio_dbf_slsb_in)
3799                 debug_unregister(qdio_dbf_slsb_in);
3800 #endif /* CONFIG_QDIO_DEBUG */
3801 }
3802
3803 static int
3804 qdio_register_dbf_views(void)
3805 {
3806         qdio_dbf_setup=debug_register(QDIO_DBF_SETUP_NAME,
3807                                       QDIO_DBF_SETUP_PAGES,
3808                                       QDIO_DBF_SETUP_NR_AREAS,
3809                                       QDIO_DBF_SETUP_LEN);
3810         if (!qdio_dbf_setup)
3811                 goto oom;
3812         debug_register_view(qdio_dbf_setup,&debug_hex_ascii_view);
3813         debug_set_level(qdio_dbf_setup,QDIO_DBF_SETUP_LEVEL);
3814
3815         qdio_dbf_sbal=debug_register(QDIO_DBF_SBAL_NAME,
3816                                      QDIO_DBF_SBAL_PAGES,
3817                                      QDIO_DBF_SBAL_NR_AREAS,
3818                                      QDIO_DBF_SBAL_LEN);
3819         if (!qdio_dbf_sbal)
3820                 goto oom;
3821
3822         debug_register_view(qdio_dbf_sbal,&debug_hex_ascii_view);
3823         debug_set_level(qdio_dbf_sbal,QDIO_DBF_SBAL_LEVEL);
3824
3825         qdio_dbf_sense=debug_register(QDIO_DBF_SENSE_NAME,
3826                                       QDIO_DBF_SENSE_PAGES,
3827                                       QDIO_DBF_SENSE_NR_AREAS,
3828                                       QDIO_DBF_SENSE_LEN);
3829         if (!qdio_dbf_sense)
3830                 goto oom;
3831
3832         debug_register_view(qdio_dbf_sense,&debug_hex_ascii_view);
3833         debug_set_level(qdio_dbf_sense,QDIO_DBF_SENSE_LEVEL);
3834
3835         qdio_dbf_trace=debug_register(QDIO_DBF_TRACE_NAME,
3836                                       QDIO_DBF_TRACE_PAGES,
3837                                       QDIO_DBF_TRACE_NR_AREAS,
3838                                       QDIO_DBF_TRACE_LEN);
3839         if (!qdio_dbf_trace)
3840                 goto oom;
3841
3842         debug_register_view(qdio_dbf_trace,&debug_hex_ascii_view);
3843         debug_set_level(qdio_dbf_trace,QDIO_DBF_TRACE_LEVEL);
3844
3845 #ifdef CONFIG_QDIO_DEBUG
3846         qdio_dbf_slsb_out=debug_register(QDIO_DBF_SLSB_OUT_NAME,
3847                                          QDIO_DBF_SLSB_OUT_PAGES,
3848                                          QDIO_DBF_SLSB_OUT_NR_AREAS,
3849                                          QDIO_DBF_SLSB_OUT_LEN);
3850         if (!qdio_dbf_slsb_out)
3851                 goto oom;
3852         debug_register_view(qdio_dbf_slsb_out,&debug_hex_ascii_view);
3853         debug_set_level(qdio_dbf_slsb_out,QDIO_DBF_SLSB_OUT_LEVEL);
3854
3855         qdio_dbf_slsb_in=debug_register(QDIO_DBF_SLSB_IN_NAME,
3856                                         QDIO_DBF_SLSB_IN_PAGES,
3857                                         QDIO_DBF_SLSB_IN_NR_AREAS,
3858                                         QDIO_DBF_SLSB_IN_LEN);
3859         if (!qdio_dbf_slsb_in)
3860                 goto oom;
3861         debug_register_view(qdio_dbf_slsb_in,&debug_hex_ascii_view);
3862         debug_set_level(qdio_dbf_slsb_in,QDIO_DBF_SLSB_IN_LEVEL);
3863 #endif /* CONFIG_QDIO_DEBUG */
3864         return 0;
3865 oom:
3866         QDIO_PRINT_ERR("not enough memory for dbf.\n");
3867         qdio_unregister_dbf_views();
3868         return -ENOMEM;
3869 }
3870
3871 static void *qdio_mempool_alloc(gfp_t gfp_mask, void *size)
3872 {
3873         return (void *) get_zeroed_page(gfp_mask|GFP_DMA);
3874 }
3875
3876 static void qdio_mempool_free(void *element, void *size)
3877 {
3878         free_page((unsigned long) element);
3879 }
3880
3881 static int __init
3882 init_QDIO(void)
3883 {
3884         int res;
3885         void *ptr;
3886
3887         printk("qdio: loading %s\n",version);
3888
3889         res=qdio_get_qdio_memory();
3890         if (res)
3891                 return res;
3892
3893         qdio_q_cache = kmem_cache_create("qdio_q", sizeof(struct qdio_q),
3894                                          256, 0, NULL);
3895         if (!qdio_q_cache) {
3896                 qdio_release_qdio_memory();
3897                 return -ENOMEM;
3898         }
3899
3900         res = qdio_register_dbf_views();
3901         if (res) {
3902                 kmem_cache_destroy(qdio_q_cache);
3903                 qdio_release_qdio_memory();
3904                 return res;
3905         }
3906
3907         QDIO_DBF_TEXT0(0,setup,"initQDIO");
3908         res = bus_create_file(&ccw_bus_type, &bus_attr_qdio_performance_stats);
3909
3910         memset((void*)&perf_stats,0,sizeof(perf_stats));
3911         QDIO_DBF_TEXT0(0,setup,"perfstat");
3912         ptr=&perf_stats;
3913         QDIO_DBF_HEX0(0,setup,&ptr,sizeof(void*));
3914
3915         qdio_add_procfs_entry();
3916
3917         qdio_mempool_scssc = mempool_create(QDIO_MEMPOOL_SCSSC_ELEMENTS,
3918                                             qdio_mempool_alloc,
3919                                             qdio_mempool_free, NULL);
3920
3921         if (tiqdio_check_chsc_availability())
3922                 QDIO_PRINT_ERR("Not all CHSCs supported. Continuing.\n");
3923
3924         tiqdio_register_thinints();
3925
3926         return 0;
3927  }
3928
3929 static void __exit
3930 cleanup_QDIO(void)
3931 {
3932         tiqdio_unregister_thinints();
3933         qdio_remove_procfs_entry();
3934         qdio_release_qdio_memory();
3935         qdio_unregister_dbf_views();
3936         mempool_destroy(qdio_mempool_scssc);
3937         kmem_cache_destroy(qdio_q_cache);
3938         bus_remove_file(&ccw_bus_type, &bus_attr_qdio_performance_stats);
3939         printk("qdio: %s: module removed\n",version);
3940 }
3941
3942 module_init(init_QDIO);
3943 module_exit(cleanup_QDIO);
3944
3945 EXPORT_SYMBOL(qdio_allocate);
3946 EXPORT_SYMBOL(qdio_establish);
3947 EXPORT_SYMBOL(qdio_initialize);
3948 EXPORT_SYMBOL(qdio_activate);
3949 EXPORT_SYMBOL(do_QDIO);
3950 EXPORT_SYMBOL(qdio_shutdown);
3951 EXPORT_SYMBOL(qdio_free);
3952 EXPORT_SYMBOL(qdio_cleanup);
3953 EXPORT_SYMBOL(qdio_synchronize);