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   1 /*
   2  *
   3  * linux/drivers/s390/cio/qdio.c
   4  *
   5  * Linux for S/390 QDIO base support, Hipersocket base support
   6  * version 2
   7  *
   8  * Copyright 2000,2002 IBM Corporation
   9  * Author(s):             Utz Bacher <utz.bacher@de.ibm.com>
  10  * 2.6 cio integration by Cornelia Huck <cornelia.huck@de.ibm.com>
  11  *
  12  * Restriction: only 63 iqdio subchannels would have its own indicator,
  13  * after that, subsequent subchannels share one indicator
  14  *
  15  *
  16  *
  17  *
  18  * This program is free software; you can redistribute it and/or modify
  19  * it under the terms of the GNU General Public License as published by
  20  * the Free Software Foundation; either version 2, or (at your option)
  21  * any later version.
  22  *
  23  * This program is distributed in the hope that it will be useful,
  24  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  25  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  26  * GNU General Public License for more details.
  27  *
  28  * You should have received a copy of the GNU General Public License
  29  * along with this program; if not, write to the Free Software
  30  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  31  */
  32
  33 #include <linux/module.h>
  34 #include <linux/init.h>
  35
  36 #include <linux/slab.h>
  37 #include <linux/kernel.h>
  38 #include <linux/proc_fs.h>
  39 #include <linux/timer.h>
  40 #include <linux/mempool.h>
  41
  42 #include <asm/ccwdev.h>
  43 #include <asm/io.h>
  44 #include <asm/atomic.h>
  45 #include <asm/semaphore.h>
  46 #include <asm/timex.h>
  47
  48 #include <asm/debug.h>
  49 #include <asm/s390_rdev.h>
  50 #include <asm/qdio.h>
  51
  52 #include "cio.h"
  53 #include "css.h"
  54 #include "device.h"
  55 #include "airq.h"
  56 #include "qdio.h"
  57 #include "ioasm.h"
  58 #include "chsc.h"
  59
  60 /****************** MODULE PARAMETER VARIABLES ********************/
  61 MODULE_AUTHOR("Utz Bacher <utz.bacher@de.ibm.com>");
  62 MODULE_DESCRIPTION("QDIO base support version 2, " \
  63                    "Copyright 2000 IBM Corporation");
  64 MODULE_LICENSE("GPL");
  65
  66 /******************** HERE WE GO ***********************************/
  67
  68 static const char version[] = "QDIO base support version 2";
  69
  70 static int qdio_performance_stats = 0;
  71 static int proc_perf_file_registration;
  72 static struct qdio_perf_stats perf_stats;
  73
  74 static int hydra_thinints;
  75 static int is_passthrough = 0;
  76 static int omit_svs;
  77
  78 static int indicator_used[INDICATORS_PER_CACHELINE];
  79 static __u32 * volatile indicators;
  80 static __u32 volatile spare_indicator;
  81 static atomic_t spare_indicator_usecount;
  82 #define QDIO_MEMPOOL_SCSSC_ELEMENTS 2
  83 static mempool_t *qdio_mempool_scssc;
  84
  85 static debug_info_t *qdio_dbf_setup;
  86 static debug_info_t *qdio_dbf_sbal;
  87 static debug_info_t *qdio_dbf_trace;
  88 static debug_info_t *qdio_dbf_sense;
  89 #ifdef CONFIG_QDIO_DEBUG
  90 static debug_info_t *qdio_dbf_slsb_out;
  91 static debug_info_t *qdio_dbf_slsb_in;
  92 #endif /* CONFIG_QDIO_DEBUG */
  93
  94 /* iQDIO stuff: */
  95 static volatile struct qdio_q *tiq_list=NULL; /* volatile as it could change
  96                                                  during a while loop */
  97 static DEFINE_SPINLOCK(ttiq_list_lock);
  98 static int register_thinint_result;
  99 static void tiqdio_tl(unsigned long);
 100 static DECLARE_TASKLET(tiqdio_tasklet,tiqdio_tl,0);
 101
 102 /* not a macro, as one of the arguments is atomic_read */
 103 static inline int
 104 qdio_min(int a,int b)
 105 {
 106         if (a<b)
 107                 return a;
 108         else
 109                 return b;
 110 }
 111
 112 /***************** SCRUBBER HELPER ROUTINES **********************/
 113 #ifdef CONFIG_64BIT
 114 static inline void qdio_perf_stat_inc(atomic64_t *count)
 115 {
 116         if (qdio_performance_stats)
 117                 atomic64_inc(count);
 118 }
 119
 120 static inline void qdio_perf_stat_dec(atomic64_t *count)
 121 {
 122         if (qdio_performance_stats)
 123                 atomic64_dec(count);
 124 }
 125 #else /* CONFIG_64BIT */
 126 static inline void qdio_perf_stat_inc(atomic_t *count)
 127 {
 128         if (qdio_performance_stats)
 129                 atomic_inc(count);
 130 }
 131
 132 static inline void qdio_perf_stat_dec(atomic_t *count)
 133 {
 134         if (qdio_performance_stats)
 135                 atomic_dec(count);
 136 }
 137 #endif /* CONFIG_64BIT */
 138
 139 static inline __u64
 140 qdio_get_micros(void)
 141 {
 142         return (get_clock() >> 12); /* time>>12 is microseconds */
 143 }
 144
 145 /*
 146  * unfortunately, we can't just xchg the values; in do_QDIO we want to reserve
 147  * the q in any case, so that we'll not be interrupted when we are in
 148  * qdio_mark_tiq... shouldn't have a really bad impact, as reserving almost
 149  * ever works (last famous words)
 150  */
 151 static inline int
 152 qdio_reserve_q(struct qdio_q *q)
 153 {
 154         return atomic_add_return(1,&q->use_count) - 1;
 155 }
 156
 157 static inline void
 158 qdio_release_q(struct qdio_q *q)
 159 {
 160         atomic_dec(&q->use_count);
 161 }
 162
 163 /*check ccq  */
 164 static int
 165 qdio_check_ccq(struct qdio_q *q, unsigned int ccq)
 166 {
 167         char dbf_text[15];
 168
 169         if (ccq == 0 || ccq == 32)
 170                 return 0;
 171         if (ccq == 96 || ccq == 97)
 172                 return 1;
 173         /*notify devices immediately*/
 174         sprintf(dbf_text,"%d", ccq);
 175         QDIO_DBF_TEXT2(1,trace,dbf_text);
 176         return -EIO;
 177 }
 178 /* EQBS: extract buffer states */
 179 static int
 180 qdio_do_eqbs(struct qdio_q *q, unsigned char *state,
 181              unsigned int *start, unsigned int *cnt)
 182 {
 183         struct qdio_irq *irq;
 184         unsigned int tmp_cnt, q_no, ccq;
 185         int rc ;
 186         char dbf_text[15];
 187
 188         ccq = 0;
 189         tmp_cnt = *cnt;
 190         irq = (struct qdio_irq*)q->irq_ptr;
 191         q_no = q->q_no;
 192         if(!q->is_input_q)
 193                 q_no += irq->no_input_qs;
 194 again:
 195         ccq = do_eqbs(irq->sch_token, state, q_no, start, cnt);
 196         rc = qdio_check_ccq(q, ccq);
 197         if (rc == 1) {
 198                 QDIO_DBF_TEXT5(1,trace,"eqAGAIN");
 199                 goto again;
 200         }
 201         if (rc < 0) {
 202                 QDIO_DBF_TEXT2(1,trace,"eqberr");
 203                 sprintf(dbf_text,"%2x,%2x,%d,%d",tmp_cnt, *cnt, ccq, q_no);
 204                 QDIO_DBF_TEXT2(1,trace,dbf_text);
 205                 q->handler(q->cdev,QDIO_STATUS_ACTIVATE_CHECK_CONDITION|
 206                                 QDIO_STATUS_LOOK_FOR_ERROR,
 207                                 0, 0, 0, -1, -1, q->int_parm);
 208                 return 0;
 209         }
 210         return (tmp_cnt - *cnt);
 211 }
 212
 213 /* SQBS: set buffer states */
 214 static int
 215 qdio_do_sqbs(struct qdio_q *q, unsigned char state,
 216              unsigned int *start, unsigned int *cnt)
 217 {
 218         struct qdio_irq *irq;
 219         unsigned int tmp_cnt, q_no, ccq;
 220         int rc;
 221         char dbf_text[15];
 222
 223         ccq = 0;
 224         tmp_cnt = *cnt;
 225         irq = (struct qdio_irq*)q->irq_ptr;
 226         q_no = q->q_no;
 227         if(!q->is_input_q)
 228                 q_no += irq->no_input_qs;
 229 again:
 230         ccq = do_sqbs(irq->sch_token, state, q_no, start, cnt);
 231         rc = qdio_check_ccq(q, ccq);
 232         if (rc == 1) {
 233                 QDIO_DBF_TEXT5(1,trace,"sqAGAIN");
 234                 goto again;
 235         }
 236         if (rc < 0) {
 237                 QDIO_DBF_TEXT3(1,trace,"sqberr");
 238                 sprintf(dbf_text,"%2x,%2x",tmp_cnt,*cnt);
 239                 QDIO_DBF_TEXT3(1,trace,dbf_text);
 240                 sprintf(dbf_text,"%d,%d",ccq,q_no);
 241                 QDIO_DBF_TEXT3(1,trace,dbf_text);
 242                 q->handler(q->cdev,QDIO_STATUS_ACTIVATE_CHECK_CONDITION|
 243                                 QDIO_STATUS_LOOK_FOR_ERROR,
 244                                 0, 0, 0, -1, -1, q->int_parm);
 245                 return 0;
 246         }
 247         return (tmp_cnt - *cnt);
 248 }
 249
 250 static inline int
 251 qdio_set_slsb(struct qdio_q *q, unsigned int *bufno,
 252               unsigned char state, unsigned int *count)
 253 {
 254         volatile char *slsb;
 255         struct qdio_irq *irq;
 256
 257         irq = (struct qdio_irq*)q->irq_ptr;
 258         if (!irq->is_qebsm) {
 259                 slsb = (char *)&q->slsb.acc.val[(*bufno)];
 260                 xchg(slsb, state);
 261                 return 1;
 262         }
 263         return qdio_do_sqbs(q, state, bufno, count);
 264 }
 265
 266 #ifdef CONFIG_QDIO_DEBUG
 267 static inline void
 268 qdio_trace_slsb(struct qdio_q *q)
 269 {
 270         if (q->queue_type==QDIO_TRACE_QTYPE) {
 271                 if (q->is_input_q)
 272                         QDIO_DBF_HEX2(0,slsb_in,&q->slsb,
 273                                       QDIO_MAX_BUFFERS_PER_Q);
 274                 else
 275                         QDIO_DBF_HEX2(0,slsb_out,&q->slsb,
 276                                       QDIO_MAX_BUFFERS_PER_Q);
 277         }
 278 }
 279 #endif
 280
 281 static inline int
 282 set_slsb(struct qdio_q *q, unsigned int *bufno,
 283          unsigned char state, unsigned int *count)
 284 {
 285         int rc;
 286 #ifdef CONFIG_QDIO_DEBUG
 287         qdio_trace_slsb(q);
 288 #endif
 289         rc = qdio_set_slsb(q, bufno, state, count);
 290 #ifdef CONFIG_QDIO_DEBUG
 291         qdio_trace_slsb(q);
 292 #endif
 293         return rc;
 294 }
 295 static inline int
 296 qdio_siga_sync(struct qdio_q *q, unsigned int gpr2,
 297                unsigned int gpr3)
 298 {
 299         int cc;
 300
 301         QDIO_DBF_TEXT4(0,trace,"sigasync");
 302         QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
 303
 304         qdio_perf_stat_inc(&perf_stats.siga_syncs);
 305
 306         cc = do_siga_sync(q->schid, gpr2, gpr3);
 307         if (cc)
 308                 QDIO_DBF_HEX3(0,trace,&cc,sizeof(int*));
 309
 310         return cc;
 311 }
 312
 313 static inline int
 314 qdio_siga_sync_q(struct qdio_q *q)
 315 {
 316         if (q->is_input_q)
 317                 return qdio_siga_sync(q, 0, q->mask);
 318         return qdio_siga_sync(q, q->mask, 0);
 319 }
 320
 321 static int
 322 __do_siga_output(struct qdio_q *q, unsigned int *busy_bit)
 323 {
 324        struct qdio_irq *irq;
 325        unsigned int fc = 0;
 326        unsigned long schid;
 327
 328        irq = (struct qdio_irq *) q->irq_ptr;
 329        if (!irq->is_qebsm)
 330                schid = *((u32 *)&q->schid);
 331        else {
 332                schid = irq->sch_token;
 333                fc |= 0x80;
 334        }
 335        return do_siga_output(schid, q->mask, busy_bit, fc);
 336 }
 337
 338 /*
 339  * returns QDIO_SIGA_ERROR_ACCESS_EXCEPTION as cc, when SIGA returns
 340  * an access exception
 341  */
 342 static int
 343 qdio_siga_output(struct qdio_q *q)
 344 {
 345         int cc;
 346         __u32 busy_bit;
 347         __u64 start_time=0;
 348
 349         qdio_perf_stat_inc(&perf_stats.siga_outs);
 350
 351         QDIO_DBF_TEXT4(0,trace,"sigaout");
 352         QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
 353
 354         for (;;) {
 355                 cc = __do_siga_output(q, &busy_bit);
 356 //QDIO_PRINT_ERR("cc=%x, busy=%x\n",cc,busy_bit);
 357                 if ((cc==2) && (busy_bit) && (q->is_iqdio_q)) {
 358                         if (!start_time)
 359                                 start_time=NOW;
 360                         if ((NOW-start_time)>QDIO_BUSY_BIT_PATIENCE)
 361                                 break;
 362                 } else
 363                         break;
 364         }
 365
 366         if ((cc==2) && (busy_bit))
 367                 cc |= QDIO_SIGA_ERROR_B_BIT_SET;
 368
 369         if (cc)
 370                 QDIO_DBF_HEX3(0,trace,&cc,sizeof(int*));
 371
 372         return cc;
 373 }
 374
 375 static int
 376 qdio_siga_input(struct qdio_q *q)
 377 {
 378         int cc;
 379
 380         QDIO_DBF_TEXT4(0,trace,"sigain");
 381         QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
 382
 383         qdio_perf_stat_inc(&perf_stats.siga_ins);
 384
 385         cc = do_siga_input(q->schid, q->mask);
 386
 387         if (cc)
 388                 QDIO_DBF_HEX3(0,trace,&cc,sizeof(int*));
 389
 390         return cc;
 391 }
 392
 393 /* locked by the locks in qdio_activate and qdio_cleanup */
 394 static __u32 *
 395 qdio_get_indicator(void)
 396 {
 397         int i;
 398
 399         for (i=1;i<INDICATORS_PER_CACHELINE;i++)
 400                 if (!indicator_used[i]) {
 401                         indicator_used[i]=1;
 402                         return indicators+i;
 403                 }
 404         atomic_inc(&spare_indicator_usecount);
 405         return (__u32 * volatile) &spare_indicator;
 406 }
 407
 408 /* locked by the locks in qdio_activate and qdio_cleanup */
 409 static void
 410 qdio_put_indicator(__u32 *addr)
 411 {
 412         int i;
 413
 414         if ( (addr) && (addr!=&spare_indicator) ) {
 415                 i=addr-indicators;
 416                 indicator_used[i]=0;
 417         }
 418         if (addr == &spare_indicator)
 419                 atomic_dec(&spare_indicator_usecount);
 420 }
 421
 422 static inline void
 423 tiqdio_clear_summary_bit(__u32 *location)
 424 {
 425         QDIO_DBF_TEXT5(0,trace,"clrsummb");
 426         QDIO_DBF_HEX5(0,trace,&location,sizeof(void*));
 427
 428         xchg(location,0);
 429 }
 430
 431 static inline  void
 432 tiqdio_set_summary_bit(__u32 *location)
 433 {
 434         QDIO_DBF_TEXT5(0,trace,"setsummb");
 435         QDIO_DBF_HEX5(0,trace,&location,sizeof(void*));
 436
 437         xchg(location,-1);
 438 }
 439
 440 static inline void
 441 tiqdio_sched_tl(void)
 442 {
 443         tasklet_hi_schedule(&tiqdio_tasklet);
 444 }
 445
 446 static void
 447 qdio_mark_tiq(struct qdio_q *q)
 448 {
 449         unsigned long flags;
 450
 451         QDIO_DBF_TEXT4(0,trace,"mark iq");
 452         QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
 453
 454         spin_lock_irqsave(&ttiq_list_lock,flags);
 455         if (unlikely(atomic_read(&q->is_in_shutdown)))
 456                 goto out_unlock;
 457
 458         if (!q->is_input_q)
 459                 goto out_unlock;
 460
 461         if ((q->list_prev) || (q->list_next))
 462                 goto out_unlock;
 463
 464         if (!tiq_list) {
 465                 tiq_list=q;
 466                 q->list_prev=q;
 467                 q->list_next=q;
 468         } else {
 469                 q->list_next=tiq_list;
 470                 q->list_prev=tiq_list->list_prev;
 471                 tiq_list->list_prev->list_next=q;
 472                 tiq_list->list_prev=q;
 473         }
 474         spin_unlock_irqrestore(&ttiq_list_lock,flags);
 475
 476         tiqdio_set_summary_bit((__u32*)q->dev_st_chg_ind);
 477         tiqdio_sched_tl();
 478         return;
 479 out_unlock:
 480         spin_unlock_irqrestore(&ttiq_list_lock,flags);
 481         return;
 482 }
 483
 484 static inline void
 485 qdio_mark_q(struct qdio_q *q)
 486 {
 487         QDIO_DBF_TEXT4(0,trace,"mark q");
 488         QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
 489
 490         if (unlikely(atomic_read(&q->is_in_shutdown)))
 491                 return;
 492
 493         tasklet_schedule(&q->tasklet);
 494 }
 495
 496 static int
 497 qdio_stop_polling(struct qdio_q *q)
 498 {
 499 #ifdef QDIO_USE_PROCESSING_STATE
 500        unsigned int tmp, gsf, count = 1;
 501        unsigned char state = 0;
 502        struct qdio_irq *irq = (struct qdio_irq *) q->irq_ptr;
 503
 504         if (!atomic_xchg(&q->polling,0))
 505                 return 1;
 506
 507         QDIO_DBF_TEXT4(0,trace,"stoppoll");
 508         QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
 509
 510         /* show the card that we are not polling anymore */
 511         if (!q->is_input_q)
 512                 return 1;
 513
 514        tmp = gsf = GET_SAVED_FRONTIER(q);
 515        tmp = ((tmp + QDIO_MAX_BUFFERS_PER_Q-1) & (QDIO_MAX_BUFFERS_PER_Q-1) );
 516        set_slsb(q, &tmp, SLSB_P_INPUT_NOT_INIT, &count);
 517
 518         /*
 519          * we don't issue this SYNC_MEMORY, as we trust Rick T and
 520          * moreover will not use the PROCESSING state under VM, so
 521          * q->polling was 0 anyway
 522          */
 523         /*SYNC_MEMORY;*/
 524        if (irq->is_qebsm) {
 525                count = 1;
 526                qdio_do_eqbs(q, &state, &gsf, &count);
 527        } else
 528                state = q->slsb.acc.val[gsf];
 529        if (state != SLSB_P_INPUT_PRIMED)
 530                 return 1;
 531         /*
 532          * set our summary bit again, as otherwise there is a
 533          * small window we can miss between resetting it and
 534          * checking for PRIMED state
 535          */
 536         if (q->is_thinint_q)
 537                 tiqdio_set_summary_bit((__u32*)q->dev_st_chg_ind);
 538         return 0;
 539
 540 #else /* QDIO_USE_PROCESSING_STATE */
 541         return 1;
 542 #endif /* QDIO_USE_PROCESSING_STATE */
 543 }
 544
 545 /*
 546  * see the comment in do_QDIO and before qdio_reserve_q about the
 547  * sophisticated locking outside of unmark_q, so that we don't need to
 548  * disable the interrupts :-)
 549 */
 550 static void
 551 qdio_unmark_q(struct qdio_q *q)
 552 {
 553         unsigned long flags;
 554
 555         QDIO_DBF_TEXT4(0,trace,"unmark q");
 556         QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
 557
 558         if ((!q->list_prev)||(!q->list_next))
 559                 return;
 560
 561         if ((q->is_thinint_q)&&(q->is_input_q)) {
 562                 /* iQDIO */
 563                 spin_lock_irqsave(&ttiq_list_lock,flags);
 564                 /* in case cleanup has done this already and simultanously
 565                  * qdio_unmark_q is called from the interrupt handler, we've
 566                  * got to check this in this specific case again */
 567                 if ((!q->list_prev)||(!q->list_next))
 568                         goto out;
 569                 if (q->list_next==q) {
 570                         /* q was the only interesting q */
 571                         tiq_list=NULL;
 572                         q->list_next=NULL;
 573                         q->list_prev=NULL;
 574                 } else {
 575                         q->list_next->list_prev=q->list_prev;
 576                         q->list_prev->list_next=q->list_next;
 577                         tiq_list=q->list_next;
 578                         q->list_next=NULL;
 579                         q->list_prev=NULL;
 580                 }
 581 out:
 582                 spin_unlock_irqrestore(&ttiq_list_lock,flags);
 583         }
 584 }
 585
 586 static inline unsigned long
 587 tiqdio_clear_global_summary(void)
 588 {
 589         unsigned long time;
 590
 591         QDIO_DBF_TEXT5(0,trace,"clrglobl");
 592
 593         time = do_clear_global_summary();
 594
 595         QDIO_DBF_HEX5(0,trace,&time,sizeof(unsigned long));
 596
 597         return time;
 598 }
 599
 600
 601 /************************* OUTBOUND ROUTINES *******************************/
 602 static int
 603 qdio_qebsm_get_outbound_buffer_frontier(struct qdio_q *q)
 604 {
 605         struct qdio_irq *irq;
 606         unsigned char state;
 607         unsigned int cnt, count, ftc;
 608
 609         irq = (struct qdio_irq *) q->irq_ptr;
 610         if ((!q->is_iqdio_q) && (!q->hydra_gives_outbound_pcis))
 611                 SYNC_MEMORY;
 612
 613         ftc = q->first_to_check;
 614         count = qdio_min(atomic_read(&q->number_of_buffers_used),
 615                         (QDIO_MAX_BUFFERS_PER_Q-1));
 616         if (count == 0)
 617                 return q->first_to_check;
 618         cnt = qdio_do_eqbs(q, &state, &ftc, &count);
 619         if (cnt == 0)
 620                 return q->first_to_check;
 621         switch (state) {
 622         case SLSB_P_OUTPUT_ERROR:
 623                 QDIO_DBF_TEXT3(0,trace,"outperr");
 624                 atomic_sub(cnt , &q->number_of_buffers_used);
 625                 if (q->qdio_error)
 626                         q->error_status_flags |=
 627                                 QDIO_STATUS_MORE_THAN_ONE_QDIO_ERROR;
 628                 q->qdio_error = SLSB_P_OUTPUT_ERROR;
 629                 q->error_status_flags |= QDIO_STATUS_LOOK_FOR_ERROR;
 630                 q->first_to_check = ftc;
 631                 break;
 632         case SLSB_P_OUTPUT_EMPTY:
 633                 QDIO_DBF_TEXT5(0,trace,"outpempt");
 634                 atomic_sub(cnt, &q->number_of_buffers_used);
 635                 q->first_to_check = ftc;
 636                 break;
 637         case SLSB_CU_OUTPUT_PRIMED:
 638                 /* all buffers primed */
 639                 QDIO_DBF_TEXT5(0,trace,"outpprim");
 640                 break;
 641         default:
 642                 break;
 643         }
 644         QDIO_DBF_HEX4(0,trace,&q->first_to_check,sizeof(int));
 645         return q->first_to_check;
 646 }
 647
 648 static int
 649 qdio_qebsm_get_inbound_buffer_frontier(struct qdio_q *q)
 650 {
 651         struct qdio_irq *irq;
 652         unsigned char state;
 653         int tmp, ftc, count, cnt;
 654         char dbf_text[15];
 655
 656
 657         irq = (struct qdio_irq *) q->irq_ptr;
 658         ftc = q->first_to_check;
 659         count = qdio_min(atomic_read(&q->number_of_buffers_used),
 660                         (QDIO_MAX_BUFFERS_PER_Q-1));
 661         if (count == 0)
 662                  return q->first_to_check;
 663         cnt = qdio_do_eqbs(q, &state, &ftc, &count);
 664         if (cnt == 0)
 665                  return q->first_to_check;
 666         switch (state) {
 667         case SLSB_P_INPUT_ERROR :
 668 #ifdef CONFIG_QDIO_DEBUG
 669                 QDIO_DBF_TEXT3(1,trace,"inperr");
 670                 sprintf(dbf_text,"%2x,%2x",ftc,count);
 671                 QDIO_DBF_TEXT3(1,trace,dbf_text);
 672 #endif /* CONFIG_QDIO_DEBUG */
 673                 if (q->qdio_error)
 674                         q->error_status_flags |=
 675                                 QDIO_STATUS_MORE_THAN_ONE_QDIO_ERROR;
 676                 q->qdio_error = SLSB_P_INPUT_ERROR;
 677                 q->error_status_flags |= QDIO_STATUS_LOOK_FOR_ERROR;
 678                 atomic_sub(cnt, &q->number_of_buffers_used);
 679                 q->first_to_check = ftc;
 680                 break;
 681         case SLSB_P_INPUT_PRIMED :
 682                 QDIO_DBF_TEXT3(0,trace,"inptprim");
 683                 sprintf(dbf_text,"%2x,%2x",ftc,count);
 684                 QDIO_DBF_TEXT3(1,trace,dbf_text);
 685                 tmp = 0;
 686                 ftc = q->first_to_check;
 687 #ifdef QDIO_USE_PROCESSING_STATE
 688                 if (cnt > 1) {
 689                         cnt -= 1;
 690                         tmp = set_slsb(q, &ftc, SLSB_P_INPUT_NOT_INIT, &cnt);
 691                         if (!tmp)
 692                                 break;
 693                 }
 694                 cnt = 1;
 695                 tmp += set_slsb(q, &ftc,
 696                                SLSB_P_INPUT_PROCESSING, &cnt);
 697                 atomic_set(&q->polling, 1);
 698 #else
 699                 tmp = set_slsb(q, &ftc, SLSB_P_INPUT_NOT_INIT, &cnt);
 700 #endif
 701                 atomic_sub(tmp, &q->number_of_buffers_used);
 702                 q->first_to_check = ftc;
 703                 break;
 704         case SLSB_CU_INPUT_EMPTY:
 705         case SLSB_P_INPUT_NOT_INIT:
 706         case SLSB_P_INPUT_PROCESSING:
 707                 QDIO_DBF_TEXT5(0,trace,"inpnipro");
 708                 break;
 709         default:
 710                 break;
 711         }
 712         QDIO_DBF_HEX4(0,trace,&q->first_to_check,sizeof(int));
 713         return q->first_to_check;
 714 }
 715
 716 static int
 717 qdio_get_outbound_buffer_frontier(struct qdio_q *q)
 718 {
 719         struct qdio_irq *irq;
 720         volatile char *slsb;
 721         unsigned int count = 1;
 722         int first_not_to_check, f, f_mod_no;
 723         char dbf_text[15];
 724
 725         QDIO_DBF_TEXT4(0,trace,"getobfro");
 726         QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
 727
 728         irq = (struct qdio_irq *) q->irq_ptr;
 729         if (irq->is_qebsm)
 730                 return qdio_qebsm_get_outbound_buffer_frontier(q);
 731
 732         slsb=&q->slsb.acc.val[0];
 733         f_mod_no=f=q->first_to_check;
 734         /*
 735          * f points to already processed elements, so f+no_used is correct...
 736          * ... but: we don't check 128 buffers, as otherwise
 737          * qdio_has_outbound_q_moved would return 0
 738          */
 739         first_not_to_check=f+qdio_min(atomic_read(&q->number_of_buffers_used),
 740                                       (QDIO_MAX_BUFFERS_PER_Q-1));
 741
 742         if ((!q->is_iqdio_q)&&(!q->hydra_gives_outbound_pcis))
 743                 SYNC_MEMORY;
 744
 745 check_next:
 746         if (f==first_not_to_check)
 747                 goto out;
 748
 749         switch(slsb[f_mod_no]) {
 750
 751         /* the adapter has not fetched the output yet */
 752         case SLSB_CU_OUTPUT_PRIMED:
 753                 QDIO_DBF_TEXT5(0,trace,"outpprim");
 754                 break;
 755
 756         /* the adapter got it */
 757         case SLSB_P_OUTPUT_EMPTY:
 758                 atomic_dec(&q->number_of_buffers_used);
 759                 f++;
 760                 f_mod_no=f&(QDIO_MAX_BUFFERS_PER_Q-1);
 761                 QDIO_DBF_TEXT5(0,trace,"outpempt");
 762                 goto check_next;
 763
 764         case SLSB_P_OUTPUT_ERROR:
 765                 QDIO_DBF_TEXT3(0,trace,"outperr");
 766                 sprintf(dbf_text,"%x-%x-%x",f_mod_no,
 767                         q->sbal[f_mod_no]->element[14].sbalf.value,
 768                         q->sbal[f_mod_no]->element[15].sbalf.value);
 769                 QDIO_DBF_TEXT3(1,trace,dbf_text);
 770                 QDIO_DBF_HEX2(1,sbal,q->sbal[f_mod_no],256);
 771
 772                 /* kind of process the buffer */
 773                 set_slsb(q, &f_mod_no, SLSB_P_OUTPUT_NOT_INIT, &count);
 774
 775                 /*
 776                  * we increment the frontier, as this buffer
 777                  * was processed obviously
 778                  */
 779                 atomic_dec(&q->number_of_buffers_used);
 780                 f_mod_no=(f_mod_no+1)&(QDIO_MAX_BUFFERS_PER_Q-1);
 781
 782                 if (q->qdio_error)
 783                         q->error_status_flags|=
 784                                 QDIO_STATUS_MORE_THAN_ONE_QDIO_ERROR;
 785                 q->qdio_error=SLSB_P_OUTPUT_ERROR;
 786                 q->error_status_flags|=QDIO_STATUS_LOOK_FOR_ERROR;
 787
 788                 break;
 789
 790         /* no new buffers */
 791         default:
 792                 QDIO_DBF_TEXT5(0,trace,"outpni");
 793         }
 794 out:
 795         return (q->first_to_check=f_mod_no);
 796 }
 797
 798 /* all buffers are processed */
 799 static int
 800 qdio_is_outbound_q_done(struct qdio_q *q)
 801 {
 802         int no_used;
 803 #ifdef CONFIG_QDIO_DEBUG
 804         char dbf_text[15];
 805 #endif
 806
 807         no_used=atomic_read(&q->number_of_buffers_used);
 808
 809 #ifdef CONFIG_QDIO_DEBUG
 810         if (no_used) {
 811                 sprintf(dbf_text,"oqisnt%02x",no_used);
 812                 QDIO_DBF_TEXT4(0,trace,dbf_text);
 813         } else {
 814                 QDIO_DBF_TEXT4(0,trace,"oqisdone");
 815         }
 816         QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
 817 #endif /* CONFIG_QDIO_DEBUG */
 818         return (no_used==0);
 819 }
 820
 821 static int
 822 qdio_has_outbound_q_moved(struct qdio_q *q)
 823 {
 824         int i;
 825
 826         i=qdio_get_outbound_buffer_frontier(q);
 827
 828         if ( (i!=GET_SAVED_FRONTIER(q)) ||
 829              (q->error_status_flags&QDIO_STATUS_LOOK_FOR_ERROR) ) {
 830                 SAVE_FRONTIER(q,i);
 831                 QDIO_DBF_TEXT4(0,trace,"oqhasmvd");
 832                 QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
 833                 return 1;
 834         } else {
 835                 QDIO_DBF_TEXT4(0,trace,"oqhsntmv");
 836                 QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
 837                 return 0;
 838         }
 839 }
 840
 841 static void
 842 qdio_kick_outbound_q(struct qdio_q *q)
 843 {
 844         int result;
 845 #ifdef CONFIG_QDIO_DEBUG
 846         char dbf_text[15];
 847
 848         QDIO_DBF_TEXT4(0,trace,"kickoutq");
 849         QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
 850 #endif /* CONFIG_QDIO_DEBUG */
 851
 852         if (!q->siga_out)
 853                 return;
 854
 855         /* here's the story with cc=2 and busy bit set (thanks, Rick):
 856          * VM's CP could present us cc=2 and busy bit set on SIGA-write
 857          * during reconfiguration of their Guest LAN (only in HIPERS mode,
 858          * QDIO mode is asynchronous -- cc=2 and busy bit there will take
 859          * the queues down immediately; and not being under VM we have a
 860          * problem on cc=2 and busy bit set right away).
 861          *
 862          * Therefore qdio_siga_output will try for a short time constantly,
 863          * if such a condition occurs. If it doesn't change, it will
 864          * increase the busy_siga_counter and save the timestamp, and
 865          * schedule the queue for later processing (via mark_q, using the
 866          * queue tasklet). __qdio_outbound_processing will check out the
 867          * counter. If non-zero, it will call qdio_kick_outbound_q as often
 868          * as the value of the counter. This will attempt further SIGA
 869          * instructions. For each successful SIGA, the counter is
 870          * decreased, for failing SIGAs the counter remains the same, after
 871          * all.
 872          * After some time of no movement, qdio_kick_outbound_q will
 873          * finally fail and reflect corresponding error codes to call
 874          * the upper layer module and have it take the queues down.
 875          *
 876          * Note that this is a change from the original HiperSockets design
 877          * (saying cc=2 and busy bit means take the queues down), but in
 878          * these days Guest LAN didn't exist... excessive cc=2 with busy bit
 879          * conditions will still take the queues down, but the threshold is
 880          * higher due to the Guest LAN environment.
 881          */
 882
 883
 884         result=qdio_siga_output(q);
 885
 886         switch (result) {
 887         case 0:
 888                 /* went smooth this time, reset timestamp */
 889 #ifdef CONFIG_QDIO_DEBUG
 890                 QDIO_DBF_TEXT3(0,trace,"cc2reslv");
 891                 sprintf(dbf_text,"%4x%2x%2x",q->schid.sch_no,q->q_no,
 892                         atomic_read(&q->busy_siga_counter));
 893                 QDIO_DBF_TEXT3(0,trace,dbf_text);
 894 #endif /* CONFIG_QDIO_DEBUG */
 895                 q->timing.busy_start=0;
 896                 break;
 897         case (2|QDIO_SIGA_ERROR_B_BIT_SET):
 898                 /* cc=2 and busy bit: */
 899                 atomic_inc(&q->busy_siga_counter);
 900
 901                 /* if the last siga was successful, save
 902                  * timestamp here */
 903                 if (!q->timing.busy_start)
 904                         q->timing.busy_start=NOW;
 905
 906                 /* if we're in time, don't touch error_status_flags
 907                  * and siga_error */
 908                 if (NOW-q->timing.busy_start<QDIO_BUSY_BIT_GIVE_UP) {
 909                         qdio_mark_q(q);
 910                         break;
 911                 }
 912                 QDIO_DBF_TEXT2(0,trace,"cc2REPRT");
 913 #ifdef CONFIG_QDIO_DEBUG
 914                 sprintf(dbf_text,"%4x%2x%2x",q->schid.sch_no,q->q_no,
 915                         atomic_read(&q->busy_siga_counter));
 916                 QDIO_DBF_TEXT3(0,trace,dbf_text);
 917 #endif /* CONFIG_QDIO_DEBUG */
 918                 /* else fallthrough and report error */
 919         default:
 920                 /* for plain cc=1, 2 or 3: */
 921                 if (q->siga_error)
 922                         q->error_status_flags|=
 923                                 QDIO_STATUS_MORE_THAN_ONE_SIGA_ERROR;
 924                 q->error_status_flags|=
 925                         QDIO_STATUS_LOOK_FOR_ERROR;
 926                 q->siga_error=result;
 927         }
 928 }
 929
 930 static void
 931 qdio_kick_outbound_handler(struct qdio_q *q)
 932 {
 933         int start, end, real_end, count;
 934 #ifdef CONFIG_QDIO_DEBUG
 935         char dbf_text[15];
 936 #endif
 937
 938         start = q->first_element_to_kick;
 939         /* last_move_ftc was just updated */
 940         real_end = GET_SAVED_FRONTIER(q);
 941         end = (real_end+QDIO_MAX_BUFFERS_PER_Q-1)&
 942                 (QDIO_MAX_BUFFERS_PER_Q-1);
 943         count = (end+QDIO_MAX_BUFFERS_PER_Q+1-start)&
 944                 (QDIO_MAX_BUFFERS_PER_Q-1);
 945
 946 #ifdef CONFIG_QDIO_DEBUG
 947         QDIO_DBF_TEXT4(0,trace,"kickouth");
 948         QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
 949
 950         sprintf(dbf_text,"s=%2xc=%2x",start,count);
 951         QDIO_DBF_TEXT4(0,trace,dbf_text);
 952 #endif /* CONFIG_QDIO_DEBUG */
 953
 954         if (q->state==QDIO_IRQ_STATE_ACTIVE)
 955                 q->handler(q->cdev,QDIO_STATUS_OUTBOUND_INT|
 956                            q->error_status_flags,
 957                            q->qdio_error,q->siga_error,q->q_no,start,count,
 958                            q->int_parm);
 959
 960         /* for the next time: */
 961         q->first_element_to_kick=real_end;
 962         q->qdio_error=0;
 963         q->siga_error=0;
 964         q->error_status_flags=0;
 965 }
 966
 967 static void
 968 __qdio_outbound_processing(struct qdio_q *q)
 969 {
 970         int siga_attempts;
 971
 972         QDIO_DBF_TEXT4(0,trace,"qoutproc");
 973         QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
 974
 975         if (unlikely(qdio_reserve_q(q))) {
 976                 qdio_release_q(q);
 977                 qdio_perf_stat_inc(&perf_stats.outbound_tl_runs_resched);
 978                 /* as we're sissies, we'll check next time */
 979                 if (likely(!atomic_read(&q->is_in_shutdown))) {
 980                         qdio_mark_q(q);
 981                         QDIO_DBF_TEXT4(0,trace,"busy,agn");
 982                 }
 983                 return;
 984         }
 985         qdio_perf_stat_inc(&perf_stats.outbound_tl_runs);
 986         qdio_perf_stat_inc(&perf_stats.tl_runs);
 987
 988         /* see comment in qdio_kick_outbound_q */
 989         siga_attempts=atomic_read(&q->busy_siga_counter);
 990         while (siga_attempts) {
 991                 atomic_dec(&q->busy_siga_counter);
 992                 qdio_kick_outbound_q(q);
 993                 siga_attempts--;
 994         }
 995
 996         if (qdio_has_outbound_q_moved(q))
 997                 qdio_kick_outbound_handler(q);
 998
 999         if (q->queue_type == QDIO_ZFCP_QFMT) {
1000                 if ((!q->hydra_gives_outbound_pcis) &&
1001                     (!qdio_is_outbound_q_done(q)))
1002                         qdio_mark_q(q);
1003         }
1004         else if (((!q->is_iqdio_q) && (!q->is_pci_out)) ||
1005                  (q->queue_type == QDIO_IQDIO_QFMT_ASYNCH)) {
1006                 /*
1007                  * make sure buffer switch from PRIMED to EMPTY is noticed
1008                  * and outbound_handler is called
1009                  */
1010                 if (qdio_is_outbound_q_done(q)) {
1011                         del_timer(&q->timer);
1012                 } else {
1013                         if (!timer_pending(&q->timer))
1014                                 mod_timer(&q->timer, jiffies +
1015                                           QDIO_FORCE_CHECK_TIMEOUT);
1016                 }
1017         }
1018
1019         qdio_release_q(q);
1020 }
1021
1022 static void
1023 qdio_outbound_processing(struct qdio_q *q)
1024 {
1025         __qdio_outbound_processing(q);
1026 }
1027
1028 /************************* INBOUND ROUTINES *******************************/
1029
1030
1031 static int
1032 qdio_get_inbound_buffer_frontier(struct qdio_q *q)
1033 {
1034         struct qdio_irq *irq;
1035         int f,f_mod_no;
1036         volatile char *slsb;
1037         unsigned int count = 1;
1038         int first_not_to_check;
1039 #ifdef CONFIG_QDIO_DEBUG
1040         char dbf_text[15];
1041 #endif /* CONFIG_QDIO_DEBUG */
1042 #ifdef QDIO_USE_PROCESSING_STATE
1043         int last_position=-1;
1044 #endif /* QDIO_USE_PROCESSING_STATE */
1045
1046         QDIO_DBF_TEXT4(0,trace,"getibfro");
1047         QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
1048
1049         irq = (struct qdio_irq *) q->irq_ptr;
1050         if (irq->is_qebsm)
1051                 return qdio_qebsm_get_inbound_buffer_frontier(q);
1052
1053         slsb=&q->slsb.acc.val[0];
1054         f_mod_no=f=q->first_to_check;
1055         /*
1056          * we don't check 128 buffers, as otherwise qdio_has_inbound_q_moved
1057          * would return 0
1058          */
1059         first_not_to_check=f+qdio_min(atomic_read(&q->number_of_buffers_used),
1060                                       (QDIO_MAX_BUFFERS_PER_Q-1));
1061
1062         /*
1063          * we don't use this one, as a PCI or we after a thin interrupt
1064          * will sync the queues
1065          */
1066         /* SYNC_MEMORY;*/
1067
1068 check_next:
1069         f_mod_no=f&(QDIO_MAX_BUFFERS_PER_Q-1);
1070         if (f==first_not_to_check)
1071                 goto out;
1072         switch (slsb[f_mod_no]) {
1073
1074         /* CU_EMPTY means frontier is reached */
1075         case SLSB_CU_INPUT_EMPTY:
1076                 QDIO_DBF_TEXT5(0,trace,"inptempt");
1077                 break;
1078
1079         /* P_PRIMED means set slsb to P_PROCESSING and move on */
1080         case SLSB_P_INPUT_PRIMED:
1081                 QDIO_DBF_TEXT5(0,trace,"inptprim");
1082
1083 #ifdef QDIO_USE_PROCESSING_STATE
1084                 /*
1085                  * as soon as running under VM, polling the input queues will
1086                  * kill VM in terms of CP overhead
1087                  */
1088                 if (q->siga_sync) {
1089                         set_slsb(q, &f_mod_no, SLSB_P_INPUT_NOT_INIT, &count);
1090                 } else {
1091                         /* set the previous buffer to NOT_INIT. The current
1092                          * buffer will be set to PROCESSING at the end of
1093                          * this function to avoid further interrupts. */
1094                         if (last_position>=0)
1095                                 set_slsb(q, &last_position,
1096                                          SLSB_P_INPUT_NOT_INIT, &count);
1097                         atomic_set(&q->polling,1);
1098                         last_position=f_mod_no;
1099                 }
1100 #else /* QDIO_USE_PROCESSING_STATE */
1101                 set_slsb(q, &f_mod_no, SLSB_P_INPUT_NOT_INIT, &count);
1102 #endif /* QDIO_USE_PROCESSING_STATE */
1103                 /*
1104                  * not needed, as the inbound queue will be synced on the next
1105                  * siga-r, resp. tiqdio_is_inbound_q_done will do the siga-s
1106                  */
1107                 /*SYNC_MEMORY;*/
1108                 f++;
1109                 atomic_dec(&q->number_of_buffers_used);
1110                 goto check_next;
1111
1112         case SLSB_P_INPUT_NOT_INIT:
1113         case SLSB_P_INPUT_PROCESSING:
1114                 QDIO_DBF_TEXT5(0,trace,"inpnipro");
1115                 break;
1116
1117         /* P_ERROR means frontier is reached, break and report error */
1118         case SLSB_P_INPUT_ERROR:
1119 #ifdef CONFIG_QDIO_DEBUG
1120                 sprintf(dbf_text,"inperr%2x",f_mod_no);
1121                 QDIO_DBF_TEXT3(1,trace,dbf_text);
1122 #endif /* CONFIG_QDIO_DEBUG */
1123                 QDIO_DBF_HEX2(1,sbal,q->sbal[f_mod_no],256);
1124
1125                 /* kind of process the buffer */
1126                 set_slsb(q, &f_mod_no, SLSB_P_INPUT_NOT_INIT, &count);
1127
1128                 if (q->qdio_error)
1129                         q->error_status_flags|=
1130                                 QDIO_STATUS_MORE_THAN_ONE_QDIO_ERROR;
1131                 q->qdio_error=SLSB_P_INPUT_ERROR;
1132                 q->error_status_flags|=QDIO_STATUS_LOOK_FOR_ERROR;
1133
1134                 /* we increment the frontier, as this buffer
1135                  * was processed obviously */
1136                 f_mod_no=(f_mod_no+1)&(QDIO_MAX_BUFFERS_PER_Q-1);
1137                 atomic_dec(&q->number_of_buffers_used);
1138
1139 #ifdef QDIO_USE_PROCESSING_STATE
1140                 last_position=-1;
1141 #endif /* QDIO_USE_PROCESSING_STATE */
1142
1143                 break;
1144
1145         /* everything else means frontier not changed (HALTED or so) */
1146         default:
1147                 break;
1148         }
1149 out:
1150         q->first_to_check=f_mod_no;
1151
1152 #ifdef QDIO_USE_PROCESSING_STATE
1153         if (last_position>=0)
1154                 set_slsb(q, &last_position, SLSB_P_INPUT_PROCESSING, &count);
1155 #endif /* QDIO_USE_PROCESSING_STATE */
1156
1157         QDIO_DBF_HEX4(0,trace,&q->first_to_check,sizeof(int));
1158
1159         return q->first_to_check;
1160 }
1161
1162 static int
1163 qdio_has_inbound_q_moved(struct qdio_q *q)
1164 {
1165         int i;
1166
1167         i=qdio_get_inbound_buffer_frontier(q);
1168         if ( (i!=GET_SAVED_FRONTIER(q)) ||
1169              (q->error_status_flags&QDIO_STATUS_LOOK_FOR_ERROR) ) {
1170                 SAVE_FRONTIER(q,i);
1171                 if ((!q->siga_sync)&&(!q->hydra_gives_outbound_pcis))
1172                         SAVE_TIMESTAMP(q);
1173
1174                 QDIO_DBF_TEXT4(0,trace,"inhasmvd");
1175                 QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
1176                 return 1;
1177         } else {
1178                 QDIO_DBF_TEXT4(0,trace,"inhsntmv");
1179                 QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
1180                 return 0;
1181         }
1182 }
1183
1184 /* means, no more buffers to be filled */
1185 static int
1186 tiqdio_is_inbound_q_done(struct qdio_q *q)
1187 {
1188         int no_used;
1189         unsigned int start_buf, count;
1190         unsigned char state = 0;
1191         struct qdio_irq *irq = (struct qdio_irq *) q->irq_ptr;
1192
1193 #ifdef CONFIG_QDIO_DEBUG
1194         char dbf_text[15];
1195 #endif
1196
1197         no_used=atomic_read(&q->number_of_buffers_used);
1198
1199         /* propagate the change from 82 to 80 through VM */
1200         SYNC_MEMORY;
1201
1202 #ifdef CONFIG_QDIO_DEBUG
1203         if (no_used) {
1204                 sprintf(dbf_text,"iqisnt%02x",no_used);
1205                 QDIO_DBF_TEXT4(0,trace,dbf_text);
1206         } else {
1207                 QDIO_DBF_TEXT4(0,trace,"iniqisdo");
1208         }
1209         QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
1210 #endif /* CONFIG_QDIO_DEBUG */
1211
1212         if (!no_used)
1213                 return 1;
1214         if (!q->siga_sync && !irq->is_qebsm)
1215                 /* we'll check for more primed buffers in qeth_stop_polling */
1216                 return 0;
1217         if (irq->is_qebsm) {
1218                 count = 1;
1219                 start_buf = q->first_to_check;
1220                 qdio_do_eqbs(q, &state, &start_buf, &count);
1221         } else
1222                 state = q->slsb.acc.val[q->first_to_check];
1223         if (state != SLSB_P_INPUT_PRIMED)
1224                 /*
1225                  * nothing more to do, if next buffer is not PRIMED.
1226                  * note that we did a SYNC_MEMORY before, that there
1227                  * has been a sychnronization.
1228                  * we will return 0 below, as there is nothing to do
1229                  * (stop_polling not necessary, as we have not been
1230                  * using the PROCESSING state
1231                  */
1232                 return 0;
1233
1234         /*
1235          * ok, the next input buffer is primed. that means, that device state
1236          * change indicator and adapter local summary are set, so we will find
1237          * it next time.
1238          * we will return 0 below, as there is nothing to do, except scheduling
1239          * ourselves for the next time.
1240          */
1241         tiqdio_set_summary_bit((__u32*)q->dev_st_chg_ind);
1242         tiqdio_sched_tl();
1243         return 0;
1244 }
1245
1246 static int
1247 qdio_is_inbound_q_done(struct qdio_q *q)
1248 {
1249         int no_used;
1250         unsigned int start_buf, count;
1251         unsigned char state = 0;
1252         struct qdio_irq *irq = (struct qdio_irq *) q->irq_ptr;
1253
1254 #ifdef CONFIG_QDIO_DEBUG
1255         char dbf_text[15];
1256 #endif
1257
1258         no_used=atomic_read(&q->number_of_buffers_used);
1259
1260         /*
1261          * we need that one for synchronization with the adapter, as it
1262          * does a kind of PCI avoidance
1263          */
1264         SYNC_MEMORY;
1265
1266         if (!no_used) {
1267                 QDIO_DBF_TEXT4(0,trace,"inqisdnA");
1268                 QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
1269                 return 1;
1270         }
1271         if (irq->is_qebsm) {
1272                 count = 1;
1273                 start_buf = q->first_to_check;
1274                 qdio_do_eqbs(q, &state, &start_buf, &count);
1275         } else
1276                 state = q->slsb.acc.val[q->first_to_check];
1277         if (state == SLSB_P_INPUT_PRIMED) {
1278                 /* we got something to do */
1279                 QDIO_DBF_TEXT4(0,trace,"inqisntA");
1280                 QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
1281                 return 0;
1282         }
1283
1284         /* on VM, we don't poll, so the q is always done here */
1285         if (q->siga_sync)
1286                 return 1;
1287         if (q->hydra_gives_outbound_pcis)
1288                 return 1;
1289
1290         /*
1291          * at this point we know, that inbound first_to_check
1292          * has (probably) not moved (see qdio_inbound_processing)
1293          */
1294         if (NOW>GET_SAVED_TIMESTAMP(q)+q->timing.threshold) {
1295 #ifdef CONFIG_QDIO_DEBUG
1296                 QDIO_DBF_TEXT4(0,trace,"inqisdon");
1297                 QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
1298                 sprintf(dbf_text,"pf%02xcn%02x",q->first_to_check,no_used);
1299                 QDIO_DBF_TEXT4(0,trace,dbf_text);
1300 #endif /* CONFIG_QDIO_DEBUG */
1301                 return 1;
1302         } else {
1303 #ifdef CONFIG_QDIO_DEBUG
1304                 QDIO_DBF_TEXT4(0,trace,"inqisntd");
1305                 QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
1306                 sprintf(dbf_text,"pf%02xcn%02x",q->first_to_check,no_used);
1307                 QDIO_DBF_TEXT4(0,trace,dbf_text);
1308 #endif /* CONFIG_QDIO_DEBUG */
1309                 return 0;
1310         }
1311 }
1312
1313 static void
1314 qdio_kick_inbound_handler(struct qdio_q *q)
1315 {
1316         int count, start, end, real_end, i;
1317 #ifdef CONFIG_QDIO_DEBUG
1318         char dbf_text[15];
1319 #endif
1320
1321         QDIO_DBF_TEXT4(0,trace,"kickinh");
1322         QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
1323
1324         start=q->first_element_to_kick;
1325         real_end=q->first_to_check;
1326         end=(real_end+QDIO_MAX_BUFFERS_PER_Q-1)&(QDIO_MAX_BUFFERS_PER_Q-1);
1327
1328         i=start;
1329         count=0;
1330         while (1) {
1331                 count++;
1332                 if (i==end)
1333                         break;
1334                 i=(i+1)&(QDIO_MAX_BUFFERS_PER_Q-1);
1335         }
1336
1337 #ifdef CONFIG_QDIO_DEBUG
1338         sprintf(dbf_text,"s=%2xc=%2x",start,count);
1339         QDIO_DBF_TEXT4(0,trace,dbf_text);
1340 #endif /* CONFIG_QDIO_DEBUG */
1341
1342         if (likely(q->state==QDIO_IRQ_STATE_ACTIVE))
1343                 q->handler(q->cdev,
1344                            QDIO_STATUS_INBOUND_INT|q->error_status_flags,
1345                            q->qdio_error,q->siga_error,q->q_no,start,count,
1346                            q->int_parm);
1347
1348         /* for the next time: */
1349         q->first_element_to_kick=real_end;
1350         q->qdio_error=0;
1351         q->siga_error=0;
1352         q->error_status_flags=0;
1353
1354         qdio_perf_stat_inc(&perf_stats.inbound_cnt);
1355 }
1356
1357 static void
1358 __tiqdio_inbound_processing(struct qdio_q *q, int spare_ind_was_set)
1359 {
1360         struct qdio_irq *irq_ptr;
1361         struct qdio_q *oq;
1362         int i;
1363
1364         QDIO_DBF_TEXT4(0,trace,"iqinproc");
1365         QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
1366
1367         /*
1368          * we first want to reserve the q, so that we know, that we don't
1369          * interrupt ourselves and call qdio_unmark_q, as is_in_shutdown might
1370          * be set
1371          */
1372         if (unlikely(qdio_reserve_q(q))) {
1373                 qdio_release_q(q);
1374                 qdio_perf_stat_inc(&perf_stats.inbound_thin_tl_runs_resched);
1375                 /*
1376                  * as we might just be about to stop polling, we make
1377                  * sure that we check again at least once more
1378                  */
1379                 tiqdio_sched_tl();
1380                 return;
1381         }
1382         qdio_perf_stat_inc(&perf_stats.inbound_thin_tl_runs);
1383         if (unlikely(atomic_read(&q->is_in_shutdown))) {
1384                 qdio_unmark_q(q);
1385                 goto out;
1386         }
1387
1388         /*
1389          * we reset spare_ind_was_set, when the queue does not use the
1390          * spare indicator
1391          */
1392         if (spare_ind_was_set)
1393                 spare_ind_was_set = (q->dev_st_chg_ind == &spare_indicator);
1394
1395         if (!(*(q->dev_st_chg_ind)) && !spare_ind_was_set)
1396                 goto out;
1397         /*
1398          * q->dev_st_chg_ind is the indicator, be it shared or not.
1399          * only clear it, if indicator is non-shared
1400          */
1401         if (!spare_ind_was_set)
1402                 tiqdio_clear_summary_bit((__u32*)q->dev_st_chg_ind);
1403
1404         if (q->hydra_gives_outbound_pcis) {
1405                 if (!q->siga_sync_done_on_thinints) {
1406                         SYNC_MEMORY_ALL;
1407                 } else if ((!q->siga_sync_done_on_outb_tis)&&
1408                          (q->hydra_gives_outbound_pcis)) {
1409                         SYNC_MEMORY_ALL_OUTB;
1410                 }
1411         } else {
1412                 SYNC_MEMORY;
1413         }
1414         /*
1415          * maybe we have to do work on our outbound queues... at least
1416          * we have to check the outbound-int-capable thinint-capable
1417          * queues
1418          */
1419         if (q->hydra_gives_outbound_pcis) {
1420                 irq_ptr = (struct qdio_irq*)q->irq_ptr;
1421                 for (i=0;i<irq_ptr->no_output_qs;i++) {
1422                         oq = irq_ptr->output_qs[i];
1423                         if (!qdio_is_outbound_q_done(oq)) {
1424                                 qdio_perf_stat_dec(&perf_stats.tl_runs);
1425                                 __qdio_outbound_processing(oq);
1426                         }
1427                 }
1428         }
1429
1430         if (!qdio_has_inbound_q_moved(q))
1431                 goto out;
1432
1433         qdio_kick_inbound_handler(q);
1434         if (tiqdio_is_inbound_q_done(q))
1435                 if (!qdio_stop_polling(q)) {
1436                         /*
1437                          * we set the flags to get into the stuff next time,
1438                          * see also comment in qdio_stop_polling
1439                          */
1440                         tiqdio_set_summary_bit((__u32*)q->dev_st_chg_ind);
1441                         tiqdio_sched_tl();
1442                 }
1443 out:
1444         qdio_release_q(q);
1445 }
1446
1447 static void
1448 tiqdio_inbound_processing(struct qdio_q *q)
1449 {
1450         __tiqdio_inbound_processing(q, atomic_read(&spare_indicator_usecount));
1451 }
1452
1453 static void
1454 __qdio_inbound_processing(struct qdio_q *q)
1455 {
1456         int q_laps=0;
1457
1458         QDIO_DBF_TEXT4(0,trace,"qinproc");
1459         QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
1460
1461         if (unlikely(qdio_reserve_q(q))) {
1462                 qdio_release_q(q);
1463                 qdio_perf_stat_inc(&perf_stats.inbound_tl_runs_resched);
1464                 /* as we're sissies, we'll check next time */
1465                 if (likely(!atomic_read(&q->is_in_shutdown))) {
1466                         qdio_mark_q(q);
1467                         QDIO_DBF_TEXT4(0,trace,"busy,agn");
1468                 }
1469                 return;
1470         }
1471         qdio_perf_stat_inc(&perf_stats.inbound_tl_runs);
1472         qdio_perf_stat_inc(&perf_stats.tl_runs);
1473
1474 again:
1475         if (qdio_has_inbound_q_moved(q)) {
1476                 qdio_kick_inbound_handler(q);
1477                 if (!qdio_stop_polling(q)) {
1478                         q_laps++;
1479                         if (q_laps<QDIO_Q_LAPS)
1480                                 goto again;
1481                 }
1482                 qdio_mark_q(q);
1483         } else {
1484                 if (!qdio_is_inbound_q_done(q))
1485                         /* means poll time is not yet over */
1486                         qdio_mark_q(q);
1487         }
1488
1489         qdio_release_q(q);
1490 }
1491
1492 static void
1493 qdio_inbound_processing(struct qdio_q *q)
1494 {
1495         __qdio_inbound_processing(q);
1496 }
1497
1498 /************************* MAIN ROUTINES *******************************/
1499
1500 #ifdef QDIO_USE_PROCESSING_STATE
1501 static int
1502 tiqdio_reset_processing_state(struct qdio_q *q, int q_laps)
1503 {
1504         if (!q) {
1505                 tiqdio_sched_tl();
1506                 return 0;
1507         }
1508
1509         /*
1510          * under VM, we have not used the PROCESSING state, so no
1511          * need to stop polling
1512          */
1513         if (q->siga_sync)
1514                 return 2;
1515
1516         if (unlikely(qdio_reserve_q(q))) {
1517                 qdio_release_q(q);
1518                 qdio_perf_stat_inc(&perf_stats.inbound_thin_tl_runs_resched);
1519                 /*
1520                  * as we might just be about to stop polling, we make
1521                  * sure that we check again at least once more
1522                  */
1523
1524                 /*
1525                  * sanity -- we'd get here without setting the
1526                  * dev st chg ind
1527                  */
1528                 tiqdio_set_summary_bit((__u32*)q->dev_st_chg_ind);
1529                 tiqdio_sched_tl();
1530                 return 0;
1531         }
1532         if (qdio_stop_polling(q)) {
1533                 qdio_release_q(q);
1534                 return 2;
1535         }
1536         if (q_laps<QDIO_Q_LAPS-1) {
1537                 qdio_release_q(q);
1538                 return 3;
1539         }
1540         /*
1541          * we set the flags to get into the stuff
1542          * next time, see also comment in qdio_stop_polling
1543          */
1544         tiqdio_set_summary_bit((__u32*)q->dev_st_chg_ind);
1545         tiqdio_sched_tl();
1546         qdio_release_q(q);
1547         return 1;
1548
1549 }
1550 #endif /* QDIO_USE_PROCESSING_STATE */
1551
1552 static void
1553 tiqdio_inbound_checks(void)
1554 {
1555         struct qdio_q *q;
1556         int spare_ind_was_set=0;
1557 #ifdef QDIO_USE_PROCESSING_STATE
1558         int q_laps=0;
1559 #endif /* QDIO_USE_PROCESSING_STATE */
1560
1561         QDIO_DBF_TEXT4(0,trace,"iqdinbck");
1562         QDIO_DBF_TEXT5(0,trace,"iqlocsum");
1563
1564 #ifdef QDIO_USE_PROCESSING_STATE
1565 again:
1566 #endif /* QDIO_USE_PROCESSING_STATE */
1567
1568         /* when the spare indicator is used and set, save that and clear it */
1569         if ((atomic_read(&spare_indicator_usecount)) && spare_indicator) {
1570                 spare_ind_was_set = 1;
1571                 tiqdio_clear_summary_bit((__u32*)&spare_indicator);
1572         }
1573
1574         q=(struct qdio_q*)tiq_list;
1575         do {
1576                 if (!q)
1577                         break;
1578                 __tiqdio_inbound_processing(q, spare_ind_was_set);
1579                 q=(struct qdio_q*)q->list_next;
1580         } while (q!=(struct qdio_q*)tiq_list);
1581
1582 #ifdef QDIO_USE_PROCESSING_STATE
1583         q=(struct qdio_q*)tiq_list;
1584         do {
1585                 int ret;
1586
1587                 ret = tiqdio_reset_processing_state(q, q_laps);
1588                 switch (ret) {
1589                 case 0:
1590                         return;
1591                 case 1:
1592                         q_laps++;
1593                 case 2:
1594                         q = (struct qdio_q*)q->list_next;
1595                         break;
1596                 default:
1597                         q_laps++;
1598                         goto again;
1599                 }
1600         } while (q!=(struct qdio_q*)tiq_list);
1601 #endif /* QDIO_USE_PROCESSING_STATE */
1602 }
1603
1604 static void
1605 tiqdio_tl(unsigned long data)
1606 {
1607         QDIO_DBF_TEXT4(0,trace,"iqdio_tl");
1608
1609         qdio_perf_stat_inc(&perf_stats.tl_runs);
1610
1611         tiqdio_inbound_checks();
1612 }
1613
1614 /********************* GENERAL HELPER_ROUTINES ***********************/
1615
1616 static void
1617 qdio_release_irq_memory(struct qdio_irq *irq_ptr)
1618 {
1619         int i;
1620
1621         for (i=0;i<QDIO_MAX_QUEUES_PER_IRQ;i++) {
1622                 if (!irq_ptr->input_qs[i])
1623                         goto next;
1624
1625                 kfree(irq_ptr->input_qs[i]->slib);
1626                 kfree(irq_ptr->input_qs[i]);
1627
1628 next:
1629                 if (!irq_ptr->output_qs[i])
1630                         continue;
1631
1632                 kfree(irq_ptr->output_qs[i]->slib);
1633                 kfree(irq_ptr->output_qs[i]);
1634
1635         }
1636         kfree(irq_ptr->qdr);
1637         free_page((unsigned long) irq_ptr);
1638 }
1639
1640 static void
1641 qdio_set_impl_params(struct qdio_irq *irq_ptr,
1642                      unsigned int qib_param_field_format,
1643                      /* pointer to 128 bytes or NULL, if no param field */
1644                      unsigned char *qib_param_field,
1645                      /* pointer to no_queues*128 words of data or NULL */
1646                      unsigned int no_input_qs,
1647                      unsigned int no_output_qs,
1648                      unsigned long *input_slib_elements,
1649                      unsigned long *output_slib_elements)
1650 {
1651         int i,j;
1652
1653         if (!irq_ptr)
1654                 return;
1655
1656         irq_ptr->qib.pfmt=qib_param_field_format;
1657         if (qib_param_field)
1658                 memcpy(irq_ptr->qib.parm,qib_param_field,
1659                        QDIO_MAX_BUFFERS_PER_Q);
1660
1661         if (input_slib_elements)
1662                 for (i=0;i<no_input_qs;i++) {
1663                         for (j=0;j<QDIO_MAX_BUFFERS_PER_Q;j++)
1664                                 irq_ptr->input_qs[i]->slib->slibe[j].parms=
1665                                         input_slib_elements[
1666                                                 i*QDIO_MAX_BUFFERS_PER_Q+j];
1667                 }
1668         if (output_slib_elements)
1669                 for (i=0;i<no_output_qs;i++) {
1670                         for (j=0;j<QDIO_MAX_BUFFERS_PER_Q;j++)
1671                                 irq_ptr->output_qs[i]->slib->slibe[j].parms=
1672                                         output_slib_elements[
1673                                                 i*QDIO_MAX_BUFFERS_PER_Q+j];
1674                 }
1675 }
1676
1677 static int
1678 qdio_alloc_qs(struct qdio_irq *irq_ptr,
1679               int no_input_qs, int no_output_qs)
1680 {
1681         int i;
1682         struct qdio_q *q;
1683         int result=-ENOMEM;
1684
1685         for (i=0;i<no_input_qs;i++) {
1686                 q = kzalloc(sizeof(struct qdio_q), GFP_KERNEL);
1687
1688                 if (!q) {
1689                         QDIO_PRINT_ERR("kmalloc of q failed!\n");
1690                         goto out;
1691                 }
1692
1693                 q->slib = kmalloc(PAGE_SIZE, GFP_KERNEL);
1694                 if (!q->slib) {
1695                         QDIO_PRINT_ERR("kmalloc of slib failed!\n");
1696                         goto out;
1697                 }
1698
1699                 irq_ptr->input_qs[i]=q;
1700         }
1701
1702         for (i=0;i<no_output_qs;i++) {
1703                 q = kzalloc(sizeof(struct qdio_q), GFP_KERNEL);
1704
1705                 if (!q) {
1706                         goto out;
1707                 }
1708
1709                 q->slib=kmalloc(PAGE_SIZE,GFP_KERNEL);
1710                 if (!q->slib) {
1711                         QDIO_PRINT_ERR("kmalloc of slib failed!\n");
1712                         goto out;
1713                 }
1714
1715                 irq_ptr->output_qs[i]=q;
1716         }
1717
1718         result=0;
1719 out:
1720         return result;
1721 }
1722
1723 static void
1724 qdio_fill_qs(struct qdio_irq *irq_ptr, struct ccw_device *cdev,
1725              int no_input_qs, int no_output_qs,
1726              qdio_handler_t *input_handler,
1727              qdio_handler_t *output_handler,
1728              unsigned long int_parm,int q_format,
1729              unsigned long flags,
1730              void **inbound_sbals_array,
1731              void **outbound_sbals_array)
1732 {
1733         struct qdio_q *q;
1734         int i,j;
1735         char dbf_text[20]; /* see qdio_initialize */
1736         void *ptr;
1737         int available;
1738
1739         sprintf(dbf_text,"qfqs%4x",cdev->private->schid.sch_no);
1740         QDIO_DBF_TEXT0(0,setup,dbf_text);
1741         for (i=0;i<no_input_qs;i++) {
1742                 q=irq_ptr->input_qs[i];
1743
1744                 memset(q,0,((char*)&q->slib)-((char*)q));
1745                 sprintf(dbf_text,"in-q%4x",i);
1746                 QDIO_DBF_TEXT0(0,setup,dbf_text);
1747                 QDIO_DBF_HEX0(0,setup,&q,sizeof(void*));
1748
1749                 memset(q->slib,0,PAGE_SIZE);
1750                 q->sl=(struct sl*)(((char*)q->slib)+PAGE_SIZE/2);
1751
1752                 available=0;
1753
1754                 for (j=0;j<QDIO_MAX_BUFFERS_PER_Q;j++)
1755                         q->sbal[j]=*(inbound_sbals_array++);
1756
1757                 q->queue_type=q_format;
1758                 q->int_parm=int_parm;
1759                 q->schid = irq_ptr->schid;
1760                 q->irq_ptr = irq_ptr;
1761                 q->cdev = cdev;
1762                 q->mask=1<<(31-i);
1763                 q->q_no=i;
1764                 q->is_input_q=1;
1765                 q->first_to_check=0;
1766                 q->last_move_ftc=0;
1767                 q->handler=input_handler;
1768                 q->dev_st_chg_ind=irq_ptr->dev_st_chg_ind;
1769
1770                 q->tasklet.data=(unsigned long)q;
1771                 /* q->is_thinint_q isn't valid at this time, but
1772                  * irq_ptr->is_thinint_irq is */
1773                 q->tasklet.func=(void(*)(unsigned long))
1774                         ((irq_ptr->is_thinint_irq)?&tiqdio_inbound_processing:
1775                          &qdio_inbound_processing);
1776
1777                 /* actually this is not used for inbound queues. yet. */
1778                 atomic_set(&q->busy_siga_counter,0);
1779                 q->timing.busy_start=0;
1780
1781 /*              for (j=0;j<QDIO_STATS_NUMBER;j++)
1782                         q->timing.last_transfer_times[j]=(qdio_get_micros()/
1783                                                           QDIO_STATS_NUMBER)*j;
1784                 q->timing.last_transfer_index=QDIO_STATS_NUMBER-1;
1785 */
1786
1787                 /* fill in slib */
1788                 if (i>0) irq_ptr->input_qs[i-1]->slib->nsliba=
1789                                  (unsigned long)(q->slib);
1790                 q->slib->sla=(unsigned long)(q->sl);
1791                 q->slib->slsba=(unsigned long)(&q->slsb.acc.val[0]);
1792
1793                 /* fill in sl */
1794                 for (j=0;j<QDIO_MAX_BUFFERS_PER_Q;j++)
1795                         q->sl->element[j].sbal=(unsigned long)(q->sbal[j]);
1796
1797                 QDIO_DBF_TEXT2(0,setup,"sl-sb-b0");
1798                 ptr=(void*)q->sl;
1799                 QDIO_DBF_HEX2(0,setup,&ptr,sizeof(void*));
1800                 ptr=(void*)&q->slsb;
1801                 QDIO_DBF_HEX2(0,setup,&ptr,sizeof(void*));
1802                 ptr=(void*)q->sbal[0];
1803                 QDIO_DBF_HEX2(0,setup,&ptr,sizeof(void*));
1804
1805                 /* fill in slsb */
1806                 if (!irq_ptr->is_qebsm) {
1807                         unsigned int count = 1;
1808                         for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; j++)
1809                                 set_slsb(q, &j, SLSB_P_INPUT_NOT_INIT, &count);
1810                 }
1811         }
1812
1813         for (i=0;i<no_output_qs;i++) {
1814                 q=irq_ptr->output_qs[i];
1815                 memset(q,0,((char*)&q->slib)-((char*)q));
1816
1817                 sprintf(dbf_text,"outq%4x",i);
1818                 QDIO_DBF_TEXT0(0,setup,dbf_text);
1819                 QDIO_DBF_HEX0(0,setup,&q,sizeof(void*));
1820
1821                 memset(q->slib,0,PAGE_SIZE);
1822                 q->sl=(struct sl*)(((char*)q->slib)+PAGE_SIZE/2);
1823
1824                 available=0;
1825
1826                 for (j=0;j<QDIO_MAX_BUFFERS_PER_Q;j++)
1827                         q->sbal[j]=*(outbound_sbals_array++);
1828
1829                 q->queue_type=q_format;
1830                 if ((q->queue_type == QDIO_IQDIO_QFMT) &&
1831                     (no_output_qs > 1) &&
1832                     (i == no_output_qs-1))
1833                         q->queue_type = QDIO_IQDIO_QFMT_ASYNCH;
1834                 q->int_parm=int_parm;
1835                 q->is_input_q=0;
1836                 q->is_pci_out = 0;
1837                 q->schid = irq_ptr->schid;
1838                 q->cdev = cdev;
1839                 q->irq_ptr = irq_ptr;
1840                 q->mask=1<<(31-i);
1841                 q->q_no=i;
1842                 q->first_to_check=0;
1843                 q->last_move_ftc=0;
1844                 q->handler=output_handler;
1845
1846                 q->tasklet.data=(unsigned long)q;
1847                 q->tasklet.func=(void(*)(unsigned long))
1848                         &qdio_outbound_processing;
1849                 q->timer.function=(void(*)(unsigned long))
1850                         &qdio_outbound_processing;
1851                 q->timer.data = (long)q;
1852                 init_timer(&q->timer);
1853
1854                 atomic_set(&q->busy_siga_counter,0);
1855                 q->timing.busy_start=0;
1856
1857                 /* fill in slib */
1858                 if (i>0) irq_ptr->output_qs[i-1]->slib->nsliba=
1859                                  (unsigned long)(q->slib);
1860                 q->slib->sla=(unsigned long)(q->sl);
1861                 q->slib->slsba=(unsigned long)(&q->slsb.acc.val[0]);
1862
1863                 /* fill in sl */
1864                 for (j=0;j<QDIO_MAX_BUFFERS_PER_Q;j++)
1865                         q->sl->element[j].sbal=(unsigned long)(q->sbal[j]);
1866
1867                 QDIO_DBF_TEXT2(0,setup,"sl-sb-b0");
1868                 ptr=(void*)q->sl;
1869                 QDIO_DBF_HEX2(0,setup,&ptr,sizeof(void*));
1870                 ptr=(void*)&q->slsb;
1871                 QDIO_DBF_HEX2(0,setup,&ptr,sizeof(void*));
1872                 ptr=(void*)q->sbal[0];
1873                 QDIO_DBF_HEX2(0,setup,&ptr,sizeof(void*));
1874
1875                 /* fill in slsb */
1876                 if (!irq_ptr->is_qebsm) {
1877                         unsigned int count = 1;
1878                         for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; j++)
1879                                 set_slsb(q, &j, SLSB_P_OUTPUT_NOT_INIT, &count);
1880                 }
1881         }
1882 }
1883
1884 static void
1885 qdio_fill_thresholds(struct qdio_irq *irq_ptr,
1886                      unsigned int no_input_qs,
1887                      unsigned int no_output_qs,
1888                      unsigned int min_input_threshold,
1889                      unsigned int max_input_threshold,
1890                      unsigned int min_output_threshold,
1891                      unsigned int max_output_threshold)
1892 {
1893         int i;
1894         struct qdio_q *q;
1895
1896         for (i=0;i<no_input_qs;i++) {
1897                 q=irq_ptr->input_qs[i];
1898                 q->timing.threshold=max_input_threshold;
1899 /*              for (j=0;j<QDIO_STATS_CLASSES;j++) {
1900                         q->threshold_classes[j].threshold=
1901                                 min_input_threshold+
1902                                 (max_input_threshold-min_input_threshold)/
1903                                 QDIO_STATS_CLASSES;
1904                 }
1905                 qdio_use_thresholds(q,QDIO_STATS_CLASSES/2);*/
1906         }
1907         for (i=0;i<no_output_qs;i++) {
1908                 q=irq_ptr->output_qs[i];
1909                 q->timing.threshold=max_output_threshold;
1910 /*              for (j=0;j<QDIO_STATS_CLASSES;j++) {
1911                         q->threshold_classes[j].threshold=
1912                                 min_output_threshold+
1913                                 (max_output_threshold-min_output_threshold)/
1914                                 QDIO_STATS_CLASSES;
1915                 }
1916                 qdio_use_thresholds(q,QDIO_STATS_CLASSES/2);*/
1917         }
1918 }
1919
1920 static int
1921 tiqdio_thinint_handler(void)
1922 {
1923         QDIO_DBF_TEXT4(0,trace,"thin_int");
1924
1925         qdio_perf_stat_inc(&perf_stats.thinints);
1926
1927         /* SVS only when needed:
1928          * issue SVS to benefit from iqdio interrupt avoidance
1929          * (SVS clears AISOI)*/
1930         if (!omit_svs)
1931                 tiqdio_clear_global_summary();
1932
1933         tiqdio_inbound_checks();
1934         return 0;
1935 }
1936
1937 static void
1938 qdio_set_state(struct qdio_irq *irq_ptr, enum qdio_irq_states state)
1939 {
1940         int i;
1941 #ifdef CONFIG_QDIO_DEBUG
1942         char dbf_text[15];
1943
1944         QDIO_DBF_TEXT5(0,trace,"newstate");
1945         sprintf(dbf_text,"%4x%4x",irq_ptr->schid.sch_no,state);
1946         QDIO_DBF_TEXT5(0,trace,dbf_text);
1947 #endif /* CONFIG_QDIO_DEBUG */
1948
1949         irq_ptr->state=state;
1950         for (i=0;i<irq_ptr->no_input_qs;i++)
1951                 irq_ptr->input_qs[i]->state=state;
1952         for (i=0;i<irq_ptr->no_output_qs;i++)
1953                 irq_ptr->output_qs[i]->state=state;
1954         mb();
1955 }
1956
1957 static void
1958 qdio_irq_check_sense(struct subchannel_id schid, struct irb *irb)
1959 {
1960         char dbf_text[15];
1961
1962         if (irb->esw.esw0.erw.cons) {
1963                 sprintf(dbf_text,"sens%4x",schid.sch_no);
1964                 QDIO_DBF_TEXT2(1,trace,dbf_text);
1965                 QDIO_DBF_HEX0(0,sense,irb,QDIO_DBF_SENSE_LEN);
1966
1967                 QDIO_PRINT_WARN("sense data available on qdio channel.\n");
1968                 QDIO_HEXDUMP16(WARN,"irb: ",irb);
1969                 QDIO_HEXDUMP16(WARN,"sense data: ",irb->ecw);
1970         }
1971
1972 }
1973
1974 static void
1975 qdio_handle_pci(struct qdio_irq *irq_ptr)
1976 {
1977         int i;
1978         struct qdio_q *q;
1979
1980         qdio_perf_stat_inc(&perf_stats.pcis);
1981         for (i=0;i<irq_ptr->no_input_qs;i++) {
1982                 q=irq_ptr->input_qs[i];
1983                 if (q->is_input_q&QDIO_FLAG_NO_INPUT_INTERRUPT_CONTEXT)
1984                         qdio_mark_q(q);
1985                 else {
1986                         qdio_perf_stat_dec(&perf_stats.tl_runs);
1987                         __qdio_inbound_processing(q);
1988                 }
1989         }
1990         if (!irq_ptr->hydra_gives_outbound_pcis)
1991                 return;
1992         for (i=0;i<irq_ptr->no_output_qs;i++) {
1993                 q=irq_ptr->output_qs[i];
1994                 if (qdio_is_outbound_q_done(q))
1995                         continue;
1996                 qdio_perf_stat_dec(&perf_stats.tl_runs);
1997                 if (!irq_ptr->sync_done_on_outb_pcis)
1998                         SYNC_MEMORY;
1999                 __qdio_outbound_processing(q);
2000         }
2001 }
2002
2003 static void qdio_establish_handle_irq(struct ccw_device*, int, int);
2004
2005 static void
2006 qdio_handle_activate_check(struct ccw_device *cdev, unsigned long intparm,
2007                            int cstat, int dstat)
2008 {
2009         struct qdio_irq *irq_ptr;
2010         struct qdio_q *q;
2011         char dbf_text[15];
2012
2013         irq_ptr = cdev->private->qdio_data;
2014
2015         QDIO_DBF_TEXT2(1, trace, "ick2");
2016         sprintf(dbf_text,"%s", cdev->dev.bus_id);
2017         QDIO_DBF_TEXT2(1,trace,dbf_text);
2018         QDIO_DBF_HEX2(0,trace,&intparm,sizeof(int));
2019         QDIO_DBF_HEX2(0,trace,&dstat,sizeof(int));
2020         QDIO_DBF_HEX2(0,trace,&cstat,sizeof(int));
2021         QDIO_PRINT_ERR("received check condition on activate " \
2022                        "queues on device %s (cs=x%x, ds=x%x).\n",
2023                        cdev->dev.bus_id, cstat, dstat);
2024         if (irq_ptr->no_input_qs) {
2025                 q=irq_ptr->input_qs[0];
2026         } else if (irq_ptr->no_output_qs) {
2027                 q=irq_ptr->output_qs[0];
2028         } else {
2029                 QDIO_PRINT_ERR("oops... no queue registered for device %s!?\n",
2030                                cdev->dev.bus_id);
2031                 goto omit_handler_call;
2032         }
2033         q->handler(q->cdev,QDIO_STATUS_ACTIVATE_CHECK_CONDITION|
2034                    QDIO_STATUS_LOOK_FOR_ERROR,
2035                    0,0,0,-1,-1,q->int_parm);
2036 omit_handler_call:
2037         qdio_set_state(irq_ptr,QDIO_IRQ_STATE_STOPPED);
2038
2039 }
2040
2041 static void
2042 qdio_call_shutdown(struct work_struct *work)
2043 {
2044         struct ccw_device_private *priv;
2045         struct ccw_device *cdev;
2046
2047         priv = container_of(work, struct ccw_device_private, kick_work);
2048         cdev = priv->cdev;
2049         qdio_shutdown(cdev, QDIO_FLAG_CLEANUP_USING_CLEAR);
2050         put_device(&cdev->dev);
2051 }
2052
2053 static void
2054 qdio_timeout_handler(struct ccw_device *cdev)
2055 {
2056         struct qdio_irq *irq_ptr;
2057         char dbf_text[15];
2058
2059         QDIO_DBF_TEXT2(0, trace, "qtoh");
2060         sprintf(dbf_text, "%s", cdev->dev.bus_id);
2061         QDIO_DBF_TEXT2(0, trace, dbf_text);
2062
2063         irq_ptr = cdev->private->qdio_data;
2064         sprintf(dbf_text, "state:%d", irq_ptr->state);
2065         QDIO_DBF_TEXT2(0, trace, dbf_text);
2066
2067         switch (irq_ptr->state) {
2068         case QDIO_IRQ_STATE_INACTIVE:
2069                 QDIO_PRINT_ERR("establish queues on irq 0.%x.%04x: timed out\n",
2070                                irq_ptr->schid.ssid, irq_ptr->schid.sch_no);
2071                 QDIO_DBF_TEXT2(1,setup,"eq:timeo");
2072                 qdio_set_state(irq_ptr, QDIO_IRQ_STATE_ERR);
2073                 break;
2074         case QDIO_IRQ_STATE_CLEANUP:
2075                 QDIO_PRINT_INFO("Did not get interrupt on cleanup, "
2076                                 "irq=0.%x.%x.\n",
2077                                 irq_ptr->schid.ssid, irq_ptr->schid.sch_no);
2078                 qdio_set_state(irq_ptr, QDIO_IRQ_STATE_ERR);
2079                 break;
2080         case QDIO_IRQ_STATE_ESTABLISHED:
2081         case QDIO_IRQ_STATE_ACTIVE:
2082                 /* I/O has been terminated by common I/O layer. */
2083                 QDIO_PRINT_INFO("Queues on irq 0.%x.%04x killed by cio.\n",
2084                                 irq_ptr->schid.ssid, irq_ptr->schid.sch_no);
2085                 QDIO_DBF_TEXT2(1, trace, "cio:term");
2086                 qdio_set_state(irq_ptr, QDIO_IRQ_STATE_STOPPED);
2087                 if (get_device(&cdev->dev)) {
2088                         /* Can't call shutdown from interrupt context. */
2089                         PREPARE_WORK(&cdev->private->kick_work,
2090                                      qdio_call_shutdown);
2091                         queue_work(ccw_device_work, &cdev->private->kick_work);
2092                 }
2093                 break;
2094         default:
2095                 BUG();
2096         }
2097         ccw_device_set_timeout(cdev, 0);
2098         wake_up(&cdev->private->wait_q);
2099 }
2100
2101 static void
2102 qdio_handler(struct ccw_device *cdev, unsigned long intparm, struct irb *irb)
2103 {
2104         struct qdio_irq *irq_ptr;
2105         int cstat,dstat;
2106         char dbf_text[15];
2107
2108 #ifdef CONFIG_QDIO_DEBUG
2109         QDIO_DBF_TEXT4(0, trace, "qint");
2110         sprintf(dbf_text, "%s", cdev->dev.bus_id);
2111         QDIO_DBF_TEXT4(0, trace, dbf_text);
2112 #endif /* CONFIG_QDIO_DEBUG */
2113
2114         if (!intparm) {
2115                 QDIO_PRINT_ERR("got unsolicited interrupt in qdio " \
2116                                   "handler, device %s\n", cdev->dev.bus_id);
2117                 return;
2118         }
2119
2120         irq_ptr = cdev->private->qdio_data;
2121         if (!irq_ptr) {
2122                 QDIO_DBF_TEXT2(1, trace, "uint");
2123                 sprintf(dbf_text,"%s", cdev->dev.bus_id);
2124                 QDIO_DBF_TEXT2(1,trace,dbf_text);
2125                 QDIO_PRINT_ERR("received interrupt on unused device %s!\n",
2126                                cdev->dev.bus_id);
2127                 return;
2128         }
2129
2130         if (IS_ERR(irb)) {
2131                 /* Currently running i/o is in error. */
2132                 switch (PTR_ERR(irb)) {
2133                 case -EIO:
2134                         QDIO_PRINT_ERR("i/o error on device %s\n",
2135                                        cdev->dev.bus_id);
2136                         return;
2137                 case -ETIMEDOUT:
2138                         qdio_timeout_handler(cdev);
2139                         return;
2140                 default:
2141                         QDIO_PRINT_ERR("unknown error state %ld on device %s\n",
2142                                        PTR_ERR(irb), cdev->dev.bus_id);
2143                         return;
2144                 }
2145         }
2146
2147         qdio_irq_check_sense(irq_ptr->schid, irb);
2148
2149 #ifdef CONFIG_QDIO_DEBUG
2150         sprintf(dbf_text, "state:%d", irq_ptr->state);
2151         QDIO_DBF_TEXT4(0, trace, dbf_text);
2152 #endif /* CONFIG_QDIO_DEBUG */
2153
2154         cstat = irb->scsw.cstat;
2155         dstat = irb->scsw.dstat;
2156
2157         switch (irq_ptr->state) {
2158         case QDIO_IRQ_STATE_INACTIVE:
2159                 qdio_establish_handle_irq(cdev, cstat, dstat);
2160                 break;
2161
2162         case QDIO_IRQ_STATE_CLEANUP:
2163                 qdio_set_state(irq_ptr, QDIO_IRQ_STATE_INACTIVE);
2164                 break;
2165
2166         case QDIO_IRQ_STATE_ESTABLISHED:
2167         case QDIO_IRQ_STATE_ACTIVE:
2168                 if (cstat & SCHN_STAT_PCI) {
2169                         qdio_handle_pci(irq_ptr);
2170                         break;
2171                 }
2172
2173                 if ((cstat&~SCHN_STAT_PCI)||dstat) {
2174                         qdio_handle_activate_check(cdev, intparm, cstat, dstat);
2175                         break;
2176                 }
2177         default:
2178                 QDIO_PRINT_ERR("got interrupt for queues in state %d on " \
2179                                "device %s?!\n",
2180                                irq_ptr->state, cdev->dev.bus_id);
2181         }
2182         wake_up(&cdev->private->wait_q);
2183
2184 }
2185
2186 int
2187 qdio_synchronize(struct ccw_device *cdev, unsigned int flags,
2188                  unsigned int queue_number)
2189 {
2190         int cc = 0;
2191         struct qdio_q *q;
2192         struct qdio_irq *irq_ptr;
2193         void *ptr;
2194 #ifdef CONFIG_QDIO_DEBUG
2195         char dbf_text[15]="SyncXXXX";
2196 #endif
2197
2198         irq_ptr = cdev->private->qdio_data;
2199         if (!irq_ptr)
2200                 return -ENODEV;
2201
2202 #ifdef CONFIG_QDIO_DEBUG
2203         *((int*)(&dbf_text[4])) = irq_ptr->schid.sch_no;
2204         QDIO_DBF_HEX4(0,trace,dbf_text,QDIO_DBF_TRACE_LEN);
2205         *((int*)(&dbf_text[0]))=flags;
2206         *((int*)(&dbf_text[4]))=queue_number;
2207         QDIO_DBF_HEX4(0,trace,dbf_text,QDIO_DBF_TRACE_LEN);
2208 #endif /* CONFIG_QDIO_DEBUG */
2209
2210         if (flags&QDIO_FLAG_SYNC_INPUT) {
2211                 q=irq_ptr->input_qs[queue_number];
2212                 if (!q)
2213                         return -EINVAL;
2214                 if (!(irq_ptr->is_qebsm))
2215                         cc = do_siga_sync(q->schid, 0, q->mask);
2216         } else if (flags&QDIO_FLAG_SYNC_OUTPUT) {
2217                 q=irq_ptr->output_qs[queue_number];
2218                 if (!q)
2219                         return -EINVAL;
2220                 if (!(irq_ptr->is_qebsm))
2221                         cc = do_siga_sync(q->schid, q->mask, 0);
2222         } else
2223                 return -EINVAL;
2224
2225         ptr=&cc;
2226         if (cc)
2227                 QDIO_DBF_HEX3(0,trace,&ptr,sizeof(int));
2228
2229         return cc;
2230 }
2231
2232 static void
2233 qdio_check_subchannel_qebsm(struct qdio_irq *irq_ptr, unsigned char qdioac,
2234                             unsigned long token)
2235 {
2236         struct qdio_q *q;
2237         int i;
2238         unsigned int count, start_buf;
2239         char dbf_text[15];
2240
2241         /*check if QEBSM is disabled */
2242         if (!(irq_ptr->is_qebsm) || !(qdioac & 0x01)) {
2243                 irq_ptr->is_qebsm  = 0;
2244                 irq_ptr->sch_token = 0;
2245                 irq_ptr->qib.rflags &= ~QIB_RFLAGS_ENABLE_QEBSM;
2246                 QDIO_DBF_TEXT0(0,setup,"noV=V");
2247                 return;
2248         }
2249         irq_ptr->sch_token = token;
2250         /*input queue*/
2251         for (i = 0; i < irq_ptr->no_input_qs;i++) {
2252                 q = irq_ptr->input_qs[i];
2253                 count = QDIO_MAX_BUFFERS_PER_Q;
2254                 start_buf = 0;
2255                 set_slsb(q, &start_buf, SLSB_P_INPUT_NOT_INIT, &count);
2256         }
2257         sprintf(dbf_text,"V=V:%2x",irq_ptr->is_qebsm);
2258         QDIO_DBF_TEXT0(0,setup,dbf_text);
2259         sprintf(dbf_text,"%8lx",irq_ptr->sch_token);
2260         QDIO_DBF_TEXT0(0,setup,dbf_text);
2261         /*output queue*/
2262         for (i = 0; i < irq_ptr->no_output_qs; i++) {
2263                 q = irq_ptr->output_qs[i];
2264                 count = QDIO_MAX_BUFFERS_PER_Q;
2265                 start_buf = 0;
2266                 set_slsb(q, &start_buf, SLSB_P_OUTPUT_NOT_INIT, &count);
2267         }
2268 }
2269
2270 static void
2271 qdio_get_ssqd_information(struct qdio_irq *irq_ptr)
2272 {
2273         int result;
2274         unsigned char qdioac;
2275         struct {
2276                 struct chsc_header request;
2277                 u16 reserved1:10;
2278                 u16 ssid:2;
2279                 u16 fmt:4;
2280                 u16 first_sch;
2281                 u16 reserved2;
2282                 u16 last_sch;
2283                 u32 reserved3;
2284                 struct chsc_header response;
2285                 u32 reserved4;
2286                 u8  flags;
2287                 u8  reserved5;
2288                 u16 sch;
2289                 u8  qfmt;
2290                 u8  parm;
2291                 u8  qdioac1;
2292                 u8  sch_class;
2293                 u8  reserved7;
2294                 u8  icnt;
2295                 u8  reserved8;
2296                 u8  ocnt;
2297                 u8 reserved9;
2298                 u8 mbccnt;
2299                 u16 qdioac2;
2300                 u64 sch_token;
2301         } *ssqd_area;
2302
2303         QDIO_DBF_TEXT0(0,setup,"getssqd");
2304         qdioac = 0;
2305         ssqd_area = mempool_alloc(qdio_mempool_scssc, GFP_ATOMIC);
2306         if (!ssqd_area) {
2307                 QDIO_PRINT_WARN("Could not get memory for chsc. Using all " \
2308                                 "SIGAs for sch x%x.\n", irq_ptr->schid.sch_no);
2309                 irq_ptr->qdioac = CHSC_FLAG_SIGA_INPUT_NECESSARY ||
2310                                   CHSC_FLAG_SIGA_OUTPUT_NECESSARY ||
2311                                   CHSC_FLAG_SIGA_SYNC_NECESSARY; /* all flags set */
2312                 irq_ptr->is_qebsm = 0;
2313                 irq_ptr->sch_token = 0;
2314                 irq_ptr->qib.rflags &= ~QIB_RFLAGS_ENABLE_QEBSM;
2315                 return;
2316         }
2317
2318         ssqd_area->request = (struct chsc_header) {
2319                 .length = 0x0010,
2320                 .code   = 0x0024,
2321         };
2322         ssqd_area->first_sch = irq_ptr->schid.sch_no;
2323         ssqd_area->last_sch = irq_ptr->schid.sch_no;
2324         ssqd_area->ssid = irq_ptr->schid.ssid;
2325         result = chsc(ssqd_area);
2326
2327         if (result) {
2328                 QDIO_PRINT_WARN("CHSC returned cc %i. Using all " \
2329                                 "SIGAs for sch 0.%x.%x.\n", result,
2330                                 irq_ptr->schid.ssid, irq_ptr->schid.sch_no);
2331                 qdioac = CHSC_FLAG_SIGA_INPUT_NECESSARY ||
2332                         CHSC_FLAG_SIGA_OUTPUT_NECESSARY ||
2333                         CHSC_FLAG_SIGA_SYNC_NECESSARY; /* all flags set */
2334                 irq_ptr->is_qebsm  = 0;
2335                 goto out;
2336         }
2337
2338         if (ssqd_area->response.code != QDIO_CHSC_RESPONSE_CODE_OK) {
2339                 QDIO_PRINT_WARN("response upon checking SIGA needs " \
2340                                 "is 0x%x. Using all SIGAs for sch 0.%x.%x.\n",
2341                                 ssqd_area->response.code,
2342                                 irq_ptr->schid.ssid, irq_ptr->schid.sch_no);
2343                 qdioac = CHSC_FLAG_SIGA_INPUT_NECESSARY ||
2344                         CHSC_FLAG_SIGA_OUTPUT_NECESSARY ||
2345                         CHSC_FLAG_SIGA_SYNC_NECESSARY; /* all flags set */
2346                 irq_ptr->is_qebsm  = 0;
2347                 goto out;
2348         }
2349         if (!(ssqd_area->flags & CHSC_FLAG_QDIO_CAPABILITY) ||
2350             !(ssqd_area->flags & CHSC_FLAG_VALIDITY) ||
2351             (ssqd_area->sch != irq_ptr->schid.sch_no)) {
2352                 QDIO_PRINT_WARN("huh? problems checking out sch 0.%x.%x... " \
2353                                 "using all SIGAs.\n",
2354                                 irq_ptr->schid.ssid, irq_ptr->schid.sch_no);
2355                 qdioac = CHSC_FLAG_SIGA_INPUT_NECESSARY |
2356                         CHSC_FLAG_SIGA_OUTPUT_NECESSARY |
2357                         CHSC_FLAG_SIGA_SYNC_NECESSARY; /* worst case */
2358                 irq_ptr->is_qebsm  = 0;
2359                 goto out;
2360         }
2361         qdioac = ssqd_area->qdioac1;
2362 out:
2363         qdio_check_subchannel_qebsm(irq_ptr, qdioac,
2364                                     ssqd_area->sch_token);
2365         mempool_free(ssqd_area, qdio_mempool_scssc);
2366         irq_ptr->qdioac = qdioac;
2367 }
2368
2369 static unsigned int
2370 tiqdio_check_chsc_availability(void)
2371 {
2372         char dbf_text[15];
2373
2374         if (!css_characteristics_avail)
2375                 return -EIO;
2376
2377         /* Check for bit 41. */
2378         if (!css_general_characteristics.aif) {
2379                 QDIO_PRINT_WARN("Adapter interruption facility not " \
2380                                 "installed.\n");
2381                 return -ENOENT;
2382         }
2383
2384         /* Check for bits 107 and 108. */
2385         if (!css_chsc_characteristics.scssc ||
2386             !css_chsc_characteristics.scsscf) {
2387                 QDIO_PRINT_WARN("Set Chan Subsys. Char. & Fast-CHSCs " \
2388                                 "not available.\n");
2389                 return -ENOENT;
2390         }
2391
2392         /* Check for OSA/FCP thin interrupts (bit 67). */
2393         hydra_thinints = css_general_characteristics.aif_osa;
2394         sprintf(dbf_text,"hydrati%1x", hydra_thinints);
2395         QDIO_DBF_TEXT0(0,setup,dbf_text);
2396
2397 #ifdef CONFIG_64BIT
2398         /* Check for QEBSM support in general (bit 58). */
2399         is_passthrough = css_general_characteristics.qebsm;
2400 #endif
2401         sprintf(dbf_text,"cssQBS:%1x", is_passthrough);
2402         QDIO_DBF_TEXT0(0,setup,dbf_text);
2403
2404         /* Check for aif time delay disablement fac (bit 56). If installed,
2405          * omit svs even under lpar (good point by rick again) */
2406         omit_svs = css_general_characteristics.aif_tdd;
2407         sprintf(dbf_text,"omitsvs%1x", omit_svs);
2408         QDIO_DBF_TEXT0(0,setup,dbf_text);
2409         return 0;
2410 }
2411
2412
2413 static unsigned int
2414 tiqdio_set_subchannel_ind(struct qdio_irq *irq_ptr, int reset_to_zero)
2415 {
2416         unsigned long real_addr_local_summary_bit;
2417         unsigned long real_addr_dev_st_chg_ind;
2418         void *ptr;
2419         char dbf_text[15];
2420
2421         unsigned int resp_code;
2422         int result;
2423
2424         struct {
2425                 struct chsc_header request;
2426                 u16 operation_code;
2427                 u16 reserved1;
2428                 u32 reserved2;
2429                 u32 reserved3;
2430                 u64 summary_indicator_addr;
2431                 u64 subchannel_indicator_addr;
2432                 u32 ks:4;
2433                 u32 kc:4;
2434                 u32 reserved4:21;
2435                 u32 isc:3;
2436                 u32 word_with_d_bit;
2437                 /* set to 0x10000000 to enable
2438                  * time delay disablement facility */
2439                 u32 reserved5;
2440                 struct subchannel_id schid;
2441                 u32 reserved6[1004];
2442                 struct chsc_header response;
2443                 u32 reserved7;
2444         } *scssc_area;
2445
2446         if (!irq_ptr->is_thinint_irq)
2447                 return -ENODEV;
2448
2449         if (reset_to_zero) {
2450                 real_addr_local_summary_bit=0;
2451                 real_addr_dev_st_chg_ind=0;
2452         } else {
2453                 real_addr_local_summary_bit=
2454                         virt_to_phys((volatile void *)indicators);
2455                 real_addr_dev_st_chg_ind=
2456                         virt_to_phys((volatile void *)irq_ptr->dev_st_chg_ind);
2457         }
2458
2459         scssc_area = mempool_alloc(qdio_mempool_scssc, GFP_ATOMIC);
2460         if (!scssc_area) {
2461                 QDIO_PRINT_WARN("No memory for setting indicators on " \
2462                                 "subchannel 0.%x.%x.\n",
2463                                 irq_ptr->schid.ssid, irq_ptr->schid.sch_no);
2464                 return -ENOMEM;
2465         }
2466         scssc_area->request = (struct chsc_header) {
2467                 .length = 0x0fe0,
2468                 .code   = 0x0021,
2469         };
2470         scssc_area->operation_code = 0;
2471
2472         scssc_area->summary_indicator_addr = real_addr_local_summary_bit;
2473         scssc_area->subchannel_indicator_addr = real_addr_dev_st_chg_ind;
2474         scssc_area->ks = QDIO_STORAGE_KEY;
2475         scssc_area->kc = QDIO_STORAGE_KEY;
2476         scssc_area->isc = TIQDIO_THININT_ISC;
2477         scssc_area->schid = irq_ptr->schid;
2478         /* enables the time delay disablement facility. Don't care
2479          * whether it is really there (i.e. we haven't checked for
2480          * it) */
2481         if (css_general_characteristics.aif_tdd)
2482                 scssc_area->word_with_d_bit = 0x10000000;
2483         else
2484                 QDIO_PRINT_WARN("Time delay disablement facility " \
2485                                 "not available\n");
2486
2487         result = chsc(scssc_area);
2488         if (result) {
2489                 QDIO_PRINT_WARN("could not set indicators on irq 0.%x.%x, " \
2490                                 "cc=%i.\n",
2491                                 irq_ptr->schid.ssid, irq_ptr->schid.sch_no,result);
2492                 result = -EIO;
2493                 goto out;
2494         }
2495
2496         resp_code = scssc_area->response.code;
2497         if (resp_code!=QDIO_CHSC_RESPONSE_CODE_OK) {
2498                 QDIO_PRINT_WARN("response upon setting indicators " \
2499                                 "is 0x%x.\n",resp_code);
2500                 sprintf(dbf_text,"sidR%4x",resp_code);
2501                 QDIO_DBF_TEXT1(0,trace,dbf_text);
2502                 QDIO_DBF_TEXT1(0,setup,dbf_text);
2503                 ptr=&scssc_area->response;
2504                 QDIO_DBF_HEX2(1,setup,&ptr,QDIO_DBF_SETUP_LEN);
2505                 result = -EIO;
2506                 goto out;
2507         }
2508
2509         QDIO_DBF_TEXT2(0,setup,"setscind");
2510         QDIO_DBF_HEX2(0,setup,&real_addr_local_summary_bit,
2511                       sizeof(unsigned long));
2512         QDIO_DBF_HEX2(0,setup,&real_addr_dev_st_chg_ind,sizeof(unsigned long));
2513         result = 0;
2514 out:
2515         mempool_free(scssc_area, qdio_mempool_scssc);
2516         return result;
2517
2518 }
2519
2520 static unsigned int
2521 tiqdio_set_delay_target(struct qdio_irq *irq_ptr, unsigned long delay_target)
2522 {
2523         unsigned int resp_code;
2524         int result;
2525         void *ptr;
2526         char dbf_text[15];
2527
2528         struct {
2529                 struct chsc_header request;
2530                 u16 operation_code;
2531                 u16 reserved1;
2532                 u32 reserved2;
2533                 u32 reserved3;
2534                 u32 reserved4[2];
2535                 u32 delay_target;
2536                 u32 reserved5[1009];
2537                 struct chsc_header response;
2538                 u32 reserved6;
2539         } *scsscf_area;
2540
2541         if (!irq_ptr->is_thinint_irq)
2542                 return -ENODEV;
2543
2544         scsscf_area = mempool_alloc(qdio_mempool_scssc, GFP_ATOMIC);
2545         if (!scsscf_area) {
2546                 QDIO_PRINT_WARN("No memory for setting delay target on " \
2547                                 "subchannel 0.%x.%x.\n",
2548                                 irq_ptr->schid.ssid, irq_ptr->schid.sch_no);
2549                 return -ENOMEM;
2550         }
2551         scsscf_area->request = (struct chsc_header) {
2552                 .length = 0x0fe0,
2553                 .code   = 0x1027,
2554         };
2555
2556         scsscf_area->delay_target = delay_target<<16;
2557
2558         result=chsc(scsscf_area);
2559         if (result) {
2560                 QDIO_PRINT_WARN("could not set delay target on irq 0.%x.%x, " \
2561                                 "cc=%i. Continuing.\n",
2562                                 irq_ptr->schid.ssid, irq_ptr->schid.sch_no,
2563                                 result);
2564                 result = -EIO;
2565                 goto out;
2566         }
2567
2568         resp_code = scsscf_area->response.code;
2569         if (resp_code!=QDIO_CHSC_RESPONSE_CODE_OK) {
2570                 QDIO_PRINT_WARN("response upon setting delay target " \
2571                                 "is 0x%x. Continuing.\n",resp_code);
2572                 sprintf(dbf_text,"sdtR%4x",resp_code);
2573                 QDIO_DBF_TEXT1(0,trace,dbf_text);
2574                 QDIO_DBF_TEXT1(0,setup,dbf_text);
2575                 ptr=&scsscf_area->response;
2576                 QDIO_DBF_HEX2(1,trace,&ptr,QDIO_DBF_TRACE_LEN);
2577         }
2578         QDIO_DBF_TEXT2(0,trace,"delytrgt");
2579         QDIO_DBF_HEX2(0,trace,&delay_target,sizeof(unsigned long));
2580         result = 0; /* not critical */
2581 out:
2582         mempool_free(scsscf_area, qdio_mempool_scssc);
2583         return result;
2584 }
2585
2586 int
2587 qdio_cleanup(struct ccw_device *cdev, int how)
2588 {
2589         struct qdio_irq *irq_ptr;
2590         char dbf_text[15];
2591         int rc;
2592
2593         irq_ptr = cdev->private->qdio_data;
2594         if (!irq_ptr)
2595                 return -ENODEV;
2596
2597         sprintf(dbf_text,"qcln%4x",irq_ptr->schid.sch_no);
2598         QDIO_DBF_TEXT1(0,trace,dbf_text);
2599         QDIO_DBF_TEXT0(0,setup,dbf_text);
2600
2601         rc = qdio_shutdown(cdev, how);
2602         if ((rc == 0) || (rc == -EINPROGRESS))
2603                 rc = qdio_free(cdev);
2604         return rc;
2605 }
2606
2607 int
2608 qdio_shutdown(struct ccw_device *cdev, int how)
2609 {
2610         struct qdio_irq *irq_ptr;
2611         int i;
2612         int result = 0;
2613         int rc;
2614         unsigned long flags;
2615         int timeout;
2616         char dbf_text[15];
2617
2618         irq_ptr = cdev->private->qdio_data;
2619         if (!irq_ptr)
2620                 return -ENODEV;
2621
2622         down(&irq_ptr->setting_up_sema);
2623
2624         sprintf(dbf_text,"qsqs%4x",irq_ptr->schid.sch_no);
2625         QDIO_DBF_TEXT1(0,trace,dbf_text);
2626         QDIO_DBF_TEXT0(0,setup,dbf_text);
2627
2628         /* mark all qs as uninteresting */
2629         for (i=0;i<irq_ptr->no_input_qs;i++)
2630                 atomic_set(&irq_ptr->input_qs[i]->is_in_shutdown,1);
2631
2632         for (i=0;i<irq_ptr->no_output_qs;i++)
2633                 atomic_set(&irq_ptr->output_qs[i]->is_in_shutdown,1);
2634
2635         tasklet_kill(&tiqdio_tasklet);
2636
2637         for (i=0;i<irq_ptr->no_input_qs;i++) {
2638                 qdio_unmark_q(irq_ptr->input_qs[i]);
2639                 tasklet_kill(&irq_ptr->input_qs[i]->tasklet);
2640                 wait_event_interruptible_timeout(cdev->private->wait_q,
2641                                                  !atomic_read(&irq_ptr->
2642                                                               input_qs[i]->
2643                                                               use_count),
2644                                                  QDIO_NO_USE_COUNT_TIMEOUT);
2645                 if (atomic_read(&irq_ptr->input_qs[i]->use_count))
2646                         result=-EINPROGRESS;
2647         }
2648
2649         for (i=0;i<irq_ptr->no_output_qs;i++) {
2650                 tasklet_kill(&irq_ptr->output_qs[i]->tasklet);
2651                 del_timer(&irq_ptr->output_qs[i]->timer);
2652                 wait_event_interruptible_timeout(cdev->private->wait_q,
2653                                                  !atomic_read(&irq_ptr->
2654                                                               output_qs[i]->
2655                                                               use_count),
2656                                                  QDIO_NO_USE_COUNT_TIMEOUT);
2657                 if (atomic_read(&irq_ptr->output_qs[i]->use_count))
2658                         result=-EINPROGRESS;
2659         }
2660
2661         /* cleanup subchannel */
2662         spin_lock_irqsave(get_ccwdev_lock(cdev),flags);
2663         if (how&QDIO_FLAG_CLEANUP_USING_CLEAR) {
2664                 rc = ccw_device_clear(cdev, QDIO_DOING_CLEANUP);
2665                 timeout=QDIO_CLEANUP_CLEAR_TIMEOUT;
2666         } else if (how&QDIO_FLAG_CLEANUP_USING_HALT) {
2667                 rc = ccw_device_halt(cdev, QDIO_DOING_CLEANUP);
2668                 timeout=QDIO_CLEANUP_HALT_TIMEOUT;
2669         } else { /* default behaviour */
2670                 rc = ccw_device_halt(cdev, QDIO_DOING_CLEANUP);
2671                 timeout=QDIO_CLEANUP_HALT_TIMEOUT;
2672         }
2673         if (rc == -ENODEV) {
2674                 /* No need to wait for device no longer present. */
2675                 qdio_set_state(irq_ptr, QDIO_IRQ_STATE_INACTIVE);
2676                 spin_unlock_irqrestore(get_ccwdev_lock(cdev), flags);
2677         } else if (((void *)cdev->handler != (void *)qdio_handler) && rc == 0) {
2678                 /*
2679                  * Whoever put another handler there, has to cope with the
2680                  * interrupt theirself. Might happen if qdio_shutdown was
2681                  * called on already shutdown queues, but this shouldn't have
2682                  * bad side effects.
2683                  */
2684                 qdio_set_state(irq_ptr, QDIO_IRQ_STATE_INACTIVE);
2685                 spin_unlock_irqrestore(get_ccwdev_lock(cdev), flags);
2686         } else if (rc == 0) {
2687                 qdio_set_state(irq_ptr, QDIO_IRQ_STATE_CLEANUP);
2688                 ccw_device_set_timeout(cdev, timeout);
2689                 spin_unlock_irqrestore(get_ccwdev_lock(cdev),flags);
2690
2691                 wait_event(cdev->private->wait_q,
2692                            irq_ptr->state == QDIO_IRQ_STATE_INACTIVE ||
2693                            irq_ptr->state == QDIO_IRQ_STATE_ERR);
2694         } else {
2695                 QDIO_PRINT_INFO("ccw_device_{halt,clear} returned %d for "
2696                                 "device %s\n", result, cdev->dev.bus_id);
2697                 spin_unlock_irqrestore(get_ccwdev_lock(cdev), flags);
2698                 result = rc;
2699                 goto out;
2700         }
2701         if (irq_ptr->is_thinint_irq) {
2702                 qdio_put_indicator((__u32*)irq_ptr->dev_st_chg_ind);
2703                 tiqdio_set_subchannel_ind(irq_ptr,1);
2704                 /* reset adapter interrupt indicators */
2705         }
2706
2707         /* exchange int handlers, if necessary */
2708         if ((void*)cdev->handler == (void*)qdio_handler)
2709                 cdev->handler=irq_ptr->original_int_handler;
2710
2711         /* Ignore errors. */
2712         qdio_set_state(irq_ptr, QDIO_IRQ_STATE_INACTIVE);
2713         ccw_device_set_timeout(cdev, 0);
2714 out:
2715         up(&irq_ptr->setting_up_sema);
2716         return result;
2717 }
2718
2719 int
2720 qdio_free(struct ccw_device *cdev)
2721 {
2722         struct qdio_irq *irq_ptr;
2723         char dbf_text[15];
2724
2725         irq_ptr = cdev->private->qdio_data;
2726         if (!irq_ptr)
2727                 return -ENODEV;
2728
2729         down(&irq_ptr->setting_up_sema);
2730
2731         sprintf(dbf_text,"qfqs%4x",irq_ptr->schid.sch_no);
2732         QDIO_DBF_TEXT1(0,trace,dbf_text);
2733         QDIO_DBF_TEXT0(0,setup,dbf_text);
2734
2735         cdev->private->qdio_data = NULL;
2736
2737         up(&irq_ptr->setting_up_sema);
2738
2739         qdio_release_irq_memory(irq_ptr);
2740         module_put(THIS_MODULE);
2741         return 0;
2742 }
2743
2744 static void
2745 qdio_allocate_do_dbf(struct qdio_initialize *init_data)
2746 {
2747         char dbf_text[20]; /* if a printf printed out more than 8 chars */
2748
2749         sprintf(dbf_text,"qfmt:%x",init_data->q_format);
2750         QDIO_DBF_TEXT0(0,setup,dbf_text);
2751         QDIO_DBF_HEX0(0,setup,init_data->adapter_name,8);
2752         sprintf(dbf_text,"qpff%4x",init_data->qib_param_field_format);
2753         QDIO_DBF_TEXT0(0,setup,dbf_text);
2754         QDIO_DBF_HEX0(0,setup,&init_data->qib_param_field,sizeof(char*));
2755         QDIO_DBF_HEX0(0,setup,&init_data->input_slib_elements,sizeof(long*));
2756         QDIO_DBF_HEX0(0,setup,&init_data->output_slib_elements,sizeof(long*));
2757         sprintf(dbf_text,"miit%4x",init_data->min_input_threshold);
2758         QDIO_DBF_TEXT0(0,setup,dbf_text);
2759         sprintf(dbf_text,"mait%4x",init_data->max_input_threshold);
2760         QDIO_DBF_TEXT0(0,setup,dbf_text);
2761         sprintf(dbf_text,"miot%4x",init_data->min_output_threshold);
2762         QDIO_DBF_TEXT0(0,setup,dbf_text);
2763         sprintf(dbf_text,"maot%4x",init_data->max_output_threshold);
2764         QDIO_DBF_TEXT0(0,setup,dbf_text);
2765         sprintf(dbf_text,"niq:%4x",init_data->no_input_qs);
2766         QDIO_DBF_TEXT0(0,setup,dbf_text);
2767         sprintf(dbf_text,"noq:%4x",init_data->no_output_qs);
2768         QDIO_DBF_TEXT0(0,setup,dbf_text);
2769         QDIO_DBF_HEX0(0,setup,&init_data->input_handler,sizeof(void*));
2770         QDIO_DBF_HEX0(0,setup,&init_data->output_handler,sizeof(void*));
2771         QDIO_DBF_HEX0(0,setup,&init_data->int_parm,sizeof(long));
2772         QDIO_DBF_HEX0(0,setup,&init_data->flags,sizeof(long));
2773         QDIO_DBF_HEX0(0,setup,&init_data->input_sbal_addr_array,sizeof(void*));
2774         QDIO_DBF_HEX0(0,setup,&init_data->output_sbal_addr_array,sizeof(void*));
2775 }
2776
2777 static void
2778 qdio_allocate_fill_input_desc(struct qdio_irq *irq_ptr, int i, int iqfmt)
2779 {
2780         irq_ptr->input_qs[i]->is_iqdio_q = iqfmt;
2781         irq_ptr->input_qs[i]->is_thinint_q = irq_ptr->is_thinint_irq;
2782
2783         irq_ptr->qdr->qdf0[i].sliba=(unsigned long)(irq_ptr->input_qs[i]->slib);
2784
2785         irq_ptr->qdr->qdf0[i].sla=(unsigned long)(irq_ptr->input_qs[i]->sl);
2786
2787         irq_ptr->qdr->qdf0[i].slsba=
2788                 (unsigned long)(&irq_ptr->input_qs[i]->slsb.acc.val[0]);
2789
2790         irq_ptr->qdr->qdf0[i].akey=QDIO_STORAGE_KEY;
2791         irq_ptr->qdr->qdf0[i].bkey=QDIO_STORAGE_KEY;
2792         irq_ptr->qdr->qdf0[i].ckey=QDIO_STORAGE_KEY;
2793         irq_ptr->qdr->qdf0[i].dkey=QDIO_STORAGE_KEY;
2794 }
2795
2796 static void
2797 qdio_allocate_fill_output_desc(struct qdio_irq *irq_ptr, int i,
2798                                int j, int iqfmt)
2799 {
2800         irq_ptr->output_qs[i]->is_iqdio_q = iqfmt;
2801         irq_ptr->output_qs[i]->is_thinint_q = irq_ptr->is_thinint_irq;
2802
2803         irq_ptr->qdr->qdf0[i+j].sliba=(unsigned long)(irq_ptr->output_qs[i]->slib);
2804
2805         irq_ptr->qdr->qdf0[i+j].sla=(unsigned long)(irq_ptr->output_qs[i]->sl);
2806
2807         irq_ptr->qdr->qdf0[i+j].slsba=
2808                 (unsigned long)(&irq_ptr->output_qs[i]->slsb.acc.val[0]);
2809
2810         irq_ptr->qdr->qdf0[i+j].akey=QDIO_STORAGE_KEY;
2811         irq_ptr->qdr->qdf0[i+j].bkey=QDIO_STORAGE_KEY;
2812         irq_ptr->qdr->qdf0[i+j].ckey=QDIO_STORAGE_KEY;
2813         irq_ptr->qdr->qdf0[i+j].dkey=QDIO_STORAGE_KEY;
2814 }
2815
2816
2817 static void
2818 qdio_initialize_set_siga_flags_input(struct qdio_irq *irq_ptr)
2819 {
2820         int i;
2821
2822         for (i=0;i<irq_ptr->no_input_qs;i++) {
2823                 irq_ptr->input_qs[i]->siga_sync=
2824                         irq_ptr->qdioac&CHSC_FLAG_SIGA_SYNC_NECESSARY;
2825                 irq_ptr->input_qs[i]->siga_in=
2826                         irq_ptr->qdioac&CHSC_FLAG_SIGA_INPUT_NECESSARY;
2827                 irq_ptr->input_qs[i]->siga_out=
2828                         irq_ptr->qdioac&CHSC_FLAG_SIGA_OUTPUT_NECESSARY;
2829                 irq_ptr->input_qs[i]->siga_sync_done_on_thinints=
2830                         irq_ptr->qdioac&CHSC_FLAG_SIGA_SYNC_DONE_ON_THININTS;
2831                 irq_ptr->input_qs[i]->hydra_gives_outbound_pcis=
2832                         irq_ptr->hydra_gives_outbound_pcis;
2833                 irq_ptr->input_qs[i]->siga_sync_done_on_outb_tis=
2834                         ((irq_ptr->qdioac&
2835                           (CHSC_FLAG_SIGA_SYNC_DONE_ON_OUTB_PCIS|
2836                            CHSC_FLAG_SIGA_SYNC_DONE_ON_THININTS))==
2837                          (CHSC_FLAG_SIGA_SYNC_DONE_ON_OUTB_PCIS|
2838                           CHSC_FLAG_SIGA_SYNC_DONE_ON_THININTS));
2839
2840         }
2841 }
2842
2843 static void
2844 qdio_initialize_set_siga_flags_output(struct qdio_irq *irq_ptr)
2845 {
2846         int i;
2847
2848         for (i=0;i<irq_ptr->no_output_qs;i++) {
2849                 irq_ptr->output_qs[i]->siga_sync=
2850                         irq_ptr->qdioac&CHSC_FLAG_SIGA_SYNC_NECESSARY;
2851                 irq_ptr->output_qs[i]->siga_in=
2852                         irq_ptr->qdioac&CHSC_FLAG_SIGA_INPUT_NECESSARY;
2853                 irq_ptr->output_qs[i]->siga_out=
2854                         irq_ptr->qdioac&CHSC_FLAG_SIGA_OUTPUT_NECESSARY;
2855                 irq_ptr->output_qs[i]->siga_sync_done_on_thinints=
2856                         irq_ptr->qdioac&CHSC_FLAG_SIGA_SYNC_DONE_ON_THININTS;
2857                 irq_ptr->output_qs[i]->hydra_gives_outbound_pcis=
2858                         irq_ptr->hydra_gives_outbound_pcis;
2859                 irq_ptr->output_qs[i]->siga_sync_done_on_outb_tis=
2860                         ((irq_ptr->qdioac&
2861                           (CHSC_FLAG_SIGA_SYNC_DONE_ON_OUTB_PCIS|
2862                            CHSC_FLAG_SIGA_SYNC_DONE_ON_THININTS))==
2863                          (CHSC_FLAG_SIGA_SYNC_DONE_ON_OUTB_PCIS|
2864                           CHSC_FLAG_SIGA_SYNC_DONE_ON_THININTS));
2865
2866         }
2867 }
2868
2869 static int
2870 qdio_establish_irq_check_for_errors(struct ccw_device *cdev, int cstat,
2871                                     int dstat)
2872 {
2873         char dbf_text[15];
2874         struct qdio_irq *irq_ptr;
2875
2876         irq_ptr = cdev->private->qdio_data;
2877
2878         if (cstat || (dstat & ~(DEV_STAT_CHN_END|DEV_STAT_DEV_END))) {
2879                 sprintf(dbf_text,"ick1%4x",irq_ptr->schid.sch_no);
2880                 QDIO_DBF_TEXT2(1,trace,dbf_text);
2881                 QDIO_DBF_HEX2(0,trace,&dstat,sizeof(int));
2882                 QDIO_DBF_HEX2(0,trace,&cstat,sizeof(int));
2883                 QDIO_PRINT_ERR("received check condition on establish " \
2884                                "queues on irq 0.%x.%x (cs=x%x, ds=x%x).\n",
2885                                irq_ptr->schid.ssid, irq_ptr->schid.sch_no,
2886                                cstat,dstat);
2887                 qdio_set_state(irq_ptr,QDIO_IRQ_STATE_ERR);
2888         }
2889
2890         if (!(dstat & DEV_STAT_DEV_END)) {
2891                 QDIO_DBF_TEXT2(1,setup,"eq:no de");
2892                 QDIO_DBF_HEX2(0,setup,&dstat, sizeof(dstat));
2893                 QDIO_DBF_HEX2(0,setup,&cstat, sizeof(cstat));
2894                 QDIO_PRINT_ERR("establish queues on irq 0.%x.%04x: didn't get "
2895                                "device end: dstat=%02x, cstat=%02x\n",
2896                                irq_ptr->schid.ssid, irq_ptr->schid.sch_no,
2897                                dstat, cstat);
2898                 qdio_set_state(irq_ptr, QDIO_IRQ_STATE_ERR);
2899                 return 1;
2900         }
2901
2902         if (dstat & ~(DEV_STAT_CHN_END|DEV_STAT_DEV_END)) {
2903                 QDIO_DBF_TEXT2(1,setup,"eq:badio");
2904                 QDIO_DBF_HEX2(0,setup,&dstat, sizeof(dstat));
2905                 QDIO_DBF_HEX2(0,setup,&cstat, sizeof(cstat));
2906                 QDIO_PRINT_ERR("establish queues on irq 0.%x.%04x: got "
2907                                "the following devstat: dstat=%02x, "
2908                                "cstat=%02x\n", irq_ptr->schid.ssid,
2909                                irq_ptr->schid.sch_no, dstat, cstat);
2910                 qdio_set_state(irq_ptr, QDIO_IRQ_STATE_ERR);
2911                 return 1;
2912         }
2913         return 0;
2914 }
2915
2916 static void
2917 qdio_establish_handle_irq(struct ccw_device *cdev, int cstat, int dstat)
2918 {
2919         struct qdio_irq *irq_ptr;
2920         char dbf_text[15];
2921
2922         irq_ptr = cdev->private->qdio_data;
2923
2924         sprintf(dbf_text,"qehi%4x",cdev->private->schid.sch_no);
2925         QDIO_DBF_TEXT0(0,setup,dbf_text);
2926         QDIO_DBF_TEXT0(0,trace,dbf_text);
2927
2928         if (qdio_establish_irq_check_for_errors(cdev, cstat, dstat)) {
2929                 ccw_device_set_timeout(cdev, 0);
2930                 return;
2931         }
2932
2933         qdio_set_state(irq_ptr,QDIO_IRQ_STATE_ESTABLISHED);
2934         ccw_device_set_timeout(cdev, 0);
2935 }
2936
2937 int
2938 qdio_initialize(struct qdio_initialize *init_data)
2939 {
2940         int rc;
2941         char dbf_text[15];
2942
2943         sprintf(dbf_text,"qini%4x",init_data->cdev->private->schid.sch_no);
2944         QDIO_DBF_TEXT0(0,setup,dbf_text);
2945         QDIO_DBF_TEXT0(0,trace,dbf_text);
2946
2947         rc = qdio_allocate(init_data);
2948         if (rc == 0) {
2949                 rc = qdio_establish(init_data);
2950                 if (rc != 0)
2951                         qdio_free(init_data->cdev);
2952         }
2953
2954         return rc;
2955 }
2956
2957
2958 int
2959 qdio_allocate(struct qdio_initialize *init_data)
2960 {
2961         struct qdio_irq *irq_ptr;
2962         char dbf_text[15];
2963
2964         sprintf(dbf_text,"qalc%4x",init_data->cdev->private->schid.sch_no);
2965         QDIO_DBF_TEXT0(0,setup,dbf_text);
2966         QDIO_DBF_TEXT0(0,trace,dbf_text);
2967         if ( (init_data->no_input_qs>QDIO_MAX_QUEUES_PER_IRQ) ||
2968              (init_data->no_output_qs>QDIO_MAX_QUEUES_PER_IRQ) ||
2969              ((init_data->no_input_qs) && (!init_data->input_handler)) ||
2970              ((init_data->no_output_qs) && (!init_data->output_handler)) )
2971                 return -EINVAL;
2972
2973         if (!init_data->input_sbal_addr_array)
2974                 return -EINVAL;
2975
2976         if (!init_data->output_sbal_addr_array)
2977                 return -EINVAL;
2978
2979         qdio_allocate_do_dbf(init_data);
2980
2981         /* create irq */
2982         irq_ptr = (void *) get_zeroed_page(GFP_KERNEL | GFP_DMA);
2983
2984         QDIO_DBF_TEXT0(0,setup,"irq_ptr:");
2985         QDIO_DBF_HEX0(0,setup,&irq_ptr,sizeof(void*));
2986
2987         if (!irq_ptr) {
2988                 QDIO_PRINT_ERR("kmalloc of irq_ptr failed!\n");
2989                 return -ENOMEM;
2990         }
2991
2992         init_MUTEX(&irq_ptr->setting_up_sema);
2993
2994         /* QDR must be in DMA area since CCW data address is only 32 bit */
2995         irq_ptr->qdr=kmalloc(sizeof(struct qdr), GFP_KERNEL | GFP_DMA);
2996         if (!(irq_ptr->qdr)) {
2997                 free_page((unsigned long) irq_ptr);
2998                 QDIO_PRINT_ERR("kmalloc of irq_ptr->qdr failed!\n");
2999                 return -ENOMEM;
3000         }
3001         QDIO_DBF_TEXT0(0,setup,"qdr:");
3002         QDIO_DBF_HEX0(0,setup,&irq_ptr->qdr,sizeof(void*));
3003
3004         if (qdio_alloc_qs(irq_ptr,
3005                           init_data->no_input_qs,
3006                           init_data->no_output_qs)) {
3007                 qdio_release_irq_memory(irq_ptr);
3008                 return -ENOMEM;
3009         }
3010
3011         init_data->cdev->private->qdio_data = irq_ptr;
3012
3013         qdio_set_state(irq_ptr,QDIO_IRQ_STATE_INACTIVE);
3014
3015         return 0;
3016 }
3017
3018 static int qdio_fill_irq(struct qdio_initialize *init_data)
3019 {
3020         int i;
3021         char dbf_text[15];
3022         struct ciw *ciw;
3023         int is_iqdio;
3024         struct qdio_irq *irq_ptr;
3025
3026         irq_ptr = init_data->cdev->private->qdio_data;
3027
3028         memset(irq_ptr,0,((char*)&irq_ptr->qdr)-((char*)irq_ptr));
3029
3030         /* wipes qib.ac, required by ar7063 */
3031         memset(irq_ptr->qdr,0,sizeof(struct qdr));
3032
3033         irq_ptr->int_parm=init_data->int_parm;
3034
3035         irq_ptr->schid = ccw_device_get_subchannel_id(init_data->cdev);
3036         irq_ptr->no_input_qs=init_data->no_input_qs;
3037         irq_ptr->no_output_qs=init_data->no_output_qs;
3038
3039         if (init_data->q_format==QDIO_IQDIO_QFMT) {
3040                 irq_ptr->is_iqdio_irq=1;
3041                 irq_ptr->is_thinint_irq=1;
3042         } else {
3043                 irq_ptr->is_iqdio_irq=0;
3044                 irq_ptr->is_thinint_irq=hydra_thinints;
3045         }
3046         sprintf(dbf_text,"is_i_t%1x%1x",
3047                 irq_ptr->is_iqdio_irq,irq_ptr->is_thinint_irq);
3048         QDIO_DBF_TEXT2(0,setup,dbf_text);
3049
3050         if (irq_ptr->is_thinint_irq) {
3051                 irq_ptr->dev_st_chg_ind = qdio_get_indicator();
3052                 QDIO_DBF_HEX1(0,setup,&irq_ptr->dev_st_chg_ind,sizeof(void*));
3053                 if (!irq_ptr->dev_st_chg_ind) {
3054                         QDIO_PRINT_WARN("no indicator location available " \
3055                                         "for irq 0.%x.%x\n",
3056                                         irq_ptr->schid.ssid, irq_ptr->schid.sch_no);
3057                         qdio_release_irq_memory(irq_ptr);
3058                         return -ENOBUFS;
3059                 }
3060         }
3061
3062         /* defaults */
3063         irq_ptr->equeue.cmd=DEFAULT_ESTABLISH_QS_CMD;
3064         irq_ptr->equeue.count=DEFAULT_ESTABLISH_QS_COUNT;
3065         irq_ptr->aqueue.cmd=DEFAULT_ACTIVATE_QS_CMD;
3066         irq_ptr->aqueue.count=DEFAULT_ACTIVATE_QS_COUNT;
3067
3068         qdio_fill_qs(irq_ptr, init_data->cdev,
3069                      init_data->no_input_qs,
3070                      init_data->no_output_qs,
3071                      init_data->input_handler,
3072                      init_data->output_handler,init_data->int_parm,
3073                      init_data->q_format,init_data->flags,
3074                      init_data->input_sbal_addr_array,
3075                      init_data->output_sbal_addr_array);
3076
3077         if (!try_module_get(THIS_MODULE)) {
3078                 QDIO_PRINT_CRIT("try_module_get() failed!\n");
3079                 qdio_release_irq_memory(irq_ptr);
3080                 return -EINVAL;
3081         }
3082
3083         qdio_fill_thresholds(irq_ptr,init_data->no_input_qs,
3084                              init_data->no_output_qs,
3085                              init_data->min_input_threshold,
3086                              init_data->max_input_threshold,
3087                              init_data->min_output_threshold,
3088                              init_data->max_output_threshold);
3089
3090         /* fill in qdr */
3091         irq_ptr->qdr->qfmt=init_data->q_format;
3092         irq_ptr->qdr->iqdcnt=init_data->no_input_qs;
3093         irq_ptr->qdr->oqdcnt=init_data->no_output_qs;
3094         irq_ptr->qdr->iqdsz=sizeof(struct qdesfmt0)/4; /* size in words */
3095         irq_ptr->qdr->oqdsz=sizeof(struct qdesfmt0)/4;
3096
3097         irq_ptr->qdr->qiba=(unsigned long)&irq_ptr->qib;
3098         irq_ptr->qdr->qkey=QDIO_STORAGE_KEY;
3099
3100         /* fill in qib */
3101         irq_ptr->is_qebsm = is_passthrough;
3102         if (irq_ptr->is_qebsm)
3103                 irq_ptr->qib.rflags |= QIB_RFLAGS_ENABLE_QEBSM;
3104
3105         irq_ptr->qib.qfmt=init_data->q_format;
3106         if (init_data->no_input_qs)
3107                 irq_ptr->qib.isliba=(unsigned long)(irq_ptr->input_qs[0]->slib);
3108         if (init_data->no_output_qs)
3109                 irq_ptr->qib.osliba=(unsigned long)(irq_ptr->output_qs[0]->slib);
3110         memcpy(irq_ptr->qib.ebcnam,init_data->adapter_name,8);
3111
3112         qdio_set_impl_params(irq_ptr,init_data->qib_param_field_format,
3113                              init_data->qib_param_field,
3114                              init_data->no_input_qs,
3115                              init_data->no_output_qs,
3116                              init_data->input_slib_elements,
3117                              init_data->output_slib_elements);
3118
3119         /* first input descriptors, then output descriptors */
3120         is_iqdio = (init_data->q_format == QDIO_IQDIO_QFMT) ? 1 : 0;
3121         for (i=0;i<init_data->no_input_qs;i++)
3122                 qdio_allocate_fill_input_desc(irq_ptr, i, is_iqdio);
3123
3124         for (i=0;i<init_data->no_output_qs;i++)
3125                 qdio_allocate_fill_output_desc(irq_ptr, i,
3126                                                init_data->no_input_qs,
3127                                                is_iqdio);
3128
3129         /* qdr, qib, sls, slsbs, slibs, sbales filled. */
3130
3131         /* get qdio commands */
3132         ciw = ccw_device_get_ciw(init_data->cdev, CIW_TYPE_EQUEUE);
3133         if (!ciw) {
3134                 QDIO_DBF_TEXT2(1,setup,"no eq");
3135                 QDIO_PRINT_INFO("No equeue CIW found for QDIO commands. "
3136                                 "Trying to use default.\n");
3137         } else
3138                 irq_ptr->equeue = *ciw;
3139         ciw = ccw_device_get_ciw(init_data->cdev, CIW_TYPE_AQUEUE);
3140         if (!ciw) {
3141                 QDIO_DBF_TEXT2(1,setup,"no aq");
3142                 QDIO_PRINT_INFO("No aqueue CIW found for QDIO commands. "
3143                                 "Trying to use default.\n");
3144         } else
3145                 irq_ptr->aqueue = *ciw;
3146
3147         /* Set new interrupt handler. */
3148         irq_ptr->original_int_handler = init_data->cdev->handler;
3149         init_data->cdev->handler = qdio_handler;
3150
3151         return 0;
3152 }
3153
3154 int
3155 qdio_establish(struct qdio_initialize *init_data)
3156 {
3157         struct qdio_irq *irq_ptr;
3158         unsigned long saveflags;
3159         int result, result2;
3160         struct ccw_device *cdev;
3161         char dbf_text[20];
3162
3163         cdev=init_data->cdev;
3164         irq_ptr = cdev->private->qdio_data;
3165         if (!irq_ptr)
3166                 return -EINVAL;
3167
3168         if (cdev->private->state != DEV_STATE_ONLINE)
3169                 return -EINVAL;
3170
3171         down(&irq_ptr->setting_up_sema);
3172
3173         qdio_fill_irq(init_data);
3174
3175         /* the thinint CHSC stuff */
3176         if (irq_ptr->is_thinint_irq) {
3177
3178                 result = tiqdio_set_subchannel_ind(irq_ptr,0);
3179                 if (result) {
3180                         up(&irq_ptr->setting_up_sema);
3181                         qdio_shutdown(cdev, QDIO_FLAG_CLEANUP_USING_CLEAR);
3182                         return result;
3183                 }
3184                 tiqdio_set_delay_target(irq_ptr,TIQDIO_DELAY_TARGET);
3185         }
3186
3187         sprintf(dbf_text,"qest%4x",cdev->private->schid.sch_no);
3188         QDIO_DBF_TEXT0(0,setup,dbf_text);
3189         QDIO_DBF_TEXT0(0,trace,dbf_text);
3190
3191         /* establish q */
3192         irq_ptr->ccw.cmd_code=irq_ptr->equeue.cmd;
3193         irq_ptr->ccw.flags=CCW_FLAG_SLI;
3194         irq_ptr->ccw.count=irq_ptr->equeue.count;
3195         irq_ptr->ccw.cda=QDIO_GET_ADDR(irq_ptr->qdr);
3196
3197         spin_lock_irqsave(get_ccwdev_lock(cdev),saveflags);
3198
3199         ccw_device_set_options_mask(cdev, 0);
3200         result=ccw_device_start_timeout(cdev,&irq_ptr->ccw,
3201                                         QDIO_DOING_ESTABLISH,0, 0,
3202                                         QDIO_ESTABLISH_TIMEOUT);
3203         if (result) {
3204                 result2=ccw_device_start_timeout(cdev,&irq_ptr->ccw,
3205                                                  QDIO_DOING_ESTABLISH,0,0,
3206                                                  QDIO_ESTABLISH_TIMEOUT);
3207                 sprintf(dbf_text,"eq:io%4x",result);
3208                 QDIO_DBF_TEXT2(1,setup,dbf_text);
3209                 if (result2) {
3210                         sprintf(dbf_text,"eq:io%4x",result);
3211                         QDIO_DBF_TEXT2(1,setup,dbf_text);
3212                 }
3213                 QDIO_PRINT_WARN("establish queues on irq 0.%x.%04x: do_IO " \
3214                                 "returned %i, next try returned %i\n",
3215                                 irq_ptr->schid.ssid, irq_ptr->schid.sch_no,
3216                                 result, result2);
3217                 result=result2;
3218                 if (result)
3219                         ccw_device_set_timeout(cdev, 0);
3220         }
3221
3222         spin_unlock_irqrestore(get_ccwdev_lock(cdev),saveflags);
3223
3224         if (result) {
3225                 up(&irq_ptr->setting_up_sema);
3226                 qdio_shutdown(cdev,QDIO_FLAG_CLEANUP_USING_CLEAR);
3227                 return result;
3228         }
3229
3230         /* Timeout is cared for already by using ccw_device_start_timeout(). */
3231         wait_event_interruptible(cdev->private->wait_q,
3232                  irq_ptr->state == QDIO_IRQ_STATE_ESTABLISHED ||
3233                  irq_ptr->state == QDIO_IRQ_STATE_ERR);
3234
3235         if (irq_ptr->state == QDIO_IRQ_STATE_ESTABLISHED)
3236                 result = 0;
3237         else {
3238                 up(&irq_ptr->setting_up_sema);
3239                 qdio_shutdown(cdev, QDIO_FLAG_CLEANUP_USING_CLEAR);
3240                 return -EIO;
3241         }
3242
3243         qdio_get_ssqd_information(irq_ptr);
3244         /* if this gets set once, we're running under VM and can omit SVSes */
3245         if (irq_ptr->qdioac&CHSC_FLAG_SIGA_SYNC_NECESSARY)
3246                 omit_svs=1;
3247
3248         sprintf(dbf_text,"qdioac%2x",irq_ptr->qdioac);
3249         QDIO_DBF_TEXT2(0,setup,dbf_text);
3250
3251         sprintf(dbf_text,"qib ac%2x",irq_ptr->qib.ac);
3252         QDIO_DBF_TEXT2(0,setup,dbf_text);
3253
3254         irq_ptr->hydra_gives_outbound_pcis=
3255                 irq_ptr->qib.ac&QIB_AC_OUTBOUND_PCI_SUPPORTED;
3256         irq_ptr->sync_done_on_outb_pcis=
3257                 irq_ptr->qdioac&CHSC_FLAG_SIGA_SYNC_DONE_ON_OUTB_PCIS;
3258
3259         qdio_initialize_set_siga_flags_input(irq_ptr);
3260         qdio_initialize_set_siga_flags_output(irq_ptr);
3261
3262         up(&irq_ptr->setting_up_sema);
3263
3264         return result;
3265
3266 }
3267
3268 int
3269 qdio_activate(struct ccw_device *cdev, int flags)
3270 {
3271         struct qdio_irq *irq_ptr;
3272         int i,result=0,result2;
3273         unsigned long saveflags;
3274         char dbf_text[20]; /* see qdio_initialize */
3275
3276         irq_ptr = cdev->private->qdio_data;
3277         if (!irq_ptr)
3278                 return -ENODEV;
3279
3280         if (cdev->private->state != DEV_STATE_ONLINE)
3281                 return -EINVAL;
3282
3283         down(&irq_ptr->setting_up_sema);
3284         if (irq_ptr->state==QDIO_IRQ_STATE_INACTIVE) {
3285                 result=-EBUSY;
3286                 goto out;
3287         }
3288
3289         sprintf(dbf_text,"qact%4x", irq_ptr->schid.sch_no);
3290         QDIO_DBF_TEXT2(0,setup,dbf_text);
3291         QDIO_DBF_TEXT2(0,trace,dbf_text);
3292
3293         /* activate q */
3294         irq_ptr->ccw.cmd_code=irq_ptr->aqueue.cmd;
3295         irq_ptr->ccw.flags=CCW_FLAG_SLI;
3296         irq_ptr->ccw.count=irq_ptr->aqueue.count;
3297         irq_ptr->ccw.cda=QDIO_GET_ADDR(0);
3298
3299         spin_lock_irqsave(get_ccwdev_lock(cdev),saveflags);
3300
3301         ccw_device_set_timeout(cdev, 0);
3302         ccw_device_set_options(cdev, CCWDEV_REPORT_ALL);
3303         result=ccw_device_start(cdev,&irq_ptr->ccw,QDIO_DOING_ACTIVATE,
3304                                 0, DOIO_DENY_PREFETCH);
3305         if (result) {
3306                 result2=ccw_device_start(cdev,&irq_ptr->ccw,
3307                                          QDIO_DOING_ACTIVATE,0,0);
3308                 sprintf(dbf_text,"aq:io%4x",result);
3309                 QDIO_DBF_TEXT2(1,setup,dbf_text);
3310                 if (result2) {
3311                         sprintf(dbf_text,"aq:io%4x",result);
3312                         QDIO_DBF_TEXT2(1,setup,dbf_text);
3313                 }
3314                 QDIO_PRINT_WARN("activate queues on irq 0.%x.%04x: do_IO " \
3315                                 "returned %i, next try returned %i\n",
3316                                 irq_ptr->schid.ssid, irq_ptr->schid.sch_no,
3317                                 result, result2);
3318                 result=result2;
3319         }
3320
3321         spin_unlock_irqrestore(get_ccwdev_lock(cdev),saveflags);
3322         if (result)
3323                 goto out;
3324
3325         for (i=0;i<irq_ptr->no_input_qs;i++) {
3326                 if (irq_ptr->is_thinint_irq) {
3327                         /*
3328                          * that way we know, that, if we will get interrupted
3329                          * by tiqdio_inbound_processing, qdio_unmark_q will
3330                          * not be called
3331                          */
3332                         qdio_reserve_q(irq_ptr->input_qs[i]);
3333                         qdio_mark_tiq(irq_ptr->input_qs[i]);
3334                         qdio_release_q(irq_ptr->input_qs[i]);
3335                 }
3336         }
3337
3338         if (flags&QDIO_FLAG_NO_INPUT_INTERRUPT_CONTEXT) {
3339                 for (i=0;i<irq_ptr->no_input_qs;i++) {
3340                         irq_ptr->input_qs[i]->is_input_q|=
3341                                 QDIO_FLAG_NO_INPUT_INTERRUPT_CONTEXT;
3342                 }
3343         }
3344
3345         wait_event_interruptible_timeout(cdev->private->wait_q,
3346                                          ((irq_ptr->state ==
3347                                           QDIO_IRQ_STATE_STOPPED) ||
3348                                           (irq_ptr->state ==
3349                                            QDIO_IRQ_STATE_ERR)),
3350                                          QDIO_ACTIVATE_TIMEOUT);
3351
3352         switch (irq_ptr->state) {
3353         case QDIO_IRQ_STATE_STOPPED:
3354         case QDIO_IRQ_STATE_ERR:
3355                 up(&irq_ptr->setting_up_sema);
3356                 qdio_shutdown(cdev, QDIO_FLAG_CLEANUP_USING_CLEAR);
3357                 down(&irq_ptr->setting_up_sema);
3358                 result = -EIO;
3359                 break;
3360         default:
3361                 qdio_set_state(irq_ptr, QDIO_IRQ_STATE_ACTIVE);
3362                 result = 0;
3363         }
3364  out:
3365         up(&irq_ptr->setting_up_sema);
3366
3367         return result;
3368 }
3369
3370 /* buffers filled forwards again to make Rick happy */
3371 static void
3372 qdio_do_qdio_fill_input(struct qdio_q *q, unsigned int qidx,
3373                         unsigned int count, struct qdio_buffer *buffers)
3374 {
3375         struct qdio_irq *irq = (struct qdio_irq *) q->irq_ptr;
3376         int tmp = 0;
3377
3378         qidx &= (QDIO_MAX_BUFFERS_PER_Q - 1);
3379         if (irq->is_qebsm) {
3380                 while (count) {
3381                         tmp = set_slsb(q, &qidx, SLSB_CU_INPUT_EMPTY, &count);
3382                         if (!tmp)
3383                                 return;
3384                 }
3385                 return;
3386         }
3387         for (;;) {
3388                 set_slsb(q, &qidx, SLSB_CU_INPUT_EMPTY, &count);
3389                 count--;
3390                 if (!count) break;
3391                 qidx = (qidx + 1) & (QDIO_MAX_BUFFERS_PER_Q - 1);
3392         }
3393 }
3394
3395 static void
3396 qdio_do_qdio_fill_output(struct qdio_q *q, unsigned int qidx,
3397                          unsigned int count, struct qdio_buffer *buffers)
3398 {
3399         struct qdio_irq *irq = (struct qdio_irq *) q->irq_ptr;
3400         int tmp = 0;
3401
3402         qidx &= (QDIO_MAX_BUFFERS_PER_Q - 1);
3403         if (irq->is_qebsm) {
3404                 while (count) {
3405                         tmp = set_slsb(q, &qidx, SLSB_CU_OUTPUT_PRIMED, &count);
3406                         if (!tmp)
3407                                 return;
3408                 }
3409                 return;
3410         }
3411
3412         for (;;) {
3413                 set_slsb(q, &qidx, SLSB_CU_OUTPUT_PRIMED, &count);
3414                 count--;
3415                 if (!count) break;
3416                 qidx = (qidx + 1) & (QDIO_MAX_BUFFERS_PER_Q - 1);
3417         }
3418 }
3419
3420 static void
3421 do_qdio_handle_inbound(struct qdio_q *q, unsigned int callflags,
3422                        unsigned int qidx, unsigned int count,
3423                        struct qdio_buffer *buffers)
3424 {
3425         int used_elements;
3426
3427         /* This is the inbound handling of queues */
3428         used_elements=atomic_add_return(count, &q->number_of_buffers_used) - count;
3429
3430         qdio_do_qdio_fill_input(q,qidx,count,buffers);
3431
3432         if ((used_elements+count==QDIO_MAX_BUFFERS_PER_Q)&&
3433             (callflags&QDIO_FLAG_UNDER_INTERRUPT))
3434                 atomic_xchg(&q->polling,0);
3435
3436         if (used_elements)
3437                 return;
3438         if (callflags&QDIO_FLAG_DONT_SIGA)
3439                 return;
3440         if (q->siga_in) {
3441                 int result;
3442
3443                 result=qdio_siga_input(q);
3444                 if (result) {
3445                         if (q->siga_error)
3446                                 q->error_status_flags|=
3447                                         QDIO_STATUS_MORE_THAN_ONE_SIGA_ERROR;
3448                         q->error_status_flags|=QDIO_STATUS_LOOK_FOR_ERROR;
3449                         q->siga_error=result;
3450                 }
3451         }
3452
3453         qdio_mark_q(q);
3454 }
3455
3456 static void
3457 do_qdio_handle_outbound(struct qdio_q *q, unsigned int callflags,
3458                         unsigned int qidx, unsigned int count,
3459                         struct qdio_buffer *buffers)
3460 {
3461         int used_elements;
3462         unsigned int cnt, start_buf;
3463         unsigned char state = 0;
3464         struct qdio_irq *irq = (struct qdio_irq *) q->irq_ptr;
3465
3466         /* This is the outbound handling of queues */
3467         qdio_do_qdio_fill_output(q,qidx,count,buffers);
3468
3469         used_elements=atomic_add_return(count, &q->number_of_buffers_used) - count;
3470
3471         if (callflags&QDIO_FLAG_DONT_SIGA) {
3472                 qdio_perf_stat_inc(&perf_stats.outbound_cnt);
3473                 return;
3474         }
3475         if (callflags & QDIO_FLAG_PCI_OUT)
3476                 q->is_pci_out = 1;
3477         else
3478                 q->is_pci_out = 0;
3479         if (q->is_iqdio_q) {
3480                 /* one siga for every sbal */
3481                 while (count--)
3482                         qdio_kick_outbound_q(q);
3483
3484                 __qdio_outbound_processing(q);
3485         } else {
3486                 /* under VM, we do a SIGA sync unconditionally */
3487                 SYNC_MEMORY;
3488                 else {
3489                         /*
3490                          * w/o shadow queues (else branch of
3491                          * SYNC_MEMORY :-/ ), we try to
3492                          * fast-requeue buffers
3493                          */
3494                         if (irq->is_qebsm) {
3495                                 cnt = 1;
3496                                 start_buf = ((qidx+QDIO_MAX_BUFFERS_PER_Q-1) &
3497                                              (QDIO_MAX_BUFFERS_PER_Q-1));
3498                                 qdio_do_eqbs(q, &state, &start_buf, &cnt);
3499                         } else
3500                                 state = q->slsb.acc.val[(qidx+QDIO_MAX_BUFFERS_PER_Q-1)
3501                                         &(QDIO_MAX_BUFFERS_PER_Q-1) ];
3502                          if (state != SLSB_CU_OUTPUT_PRIMED) {
3503                                 qdio_kick_outbound_q(q);
3504                         } else {
3505                                 QDIO_DBF_TEXT3(0,trace, "fast-req");
3506                                 qdio_perf_stat_inc(&perf_stats.fast_reqs);
3507                         }
3508                 }
3509                 /*
3510                  * only marking the q could take too long,
3511                  * the upper layer module could do a lot of
3512                  * traffic in that time
3513                  */
3514                 __qdio_outbound_processing(q);
3515         }
3516
3517         qdio_perf_stat_inc(&perf_stats.outbound_cnt);
3518 }
3519
3520 /* count must be 1 in iqdio */
3521 int
3522 do_QDIO(struct ccw_device *cdev,unsigned int callflags,
3523         unsigned int queue_number, unsigned int qidx,
3524         unsigned int count,struct qdio_buffer *buffers)
3525 {
3526         struct qdio_irq *irq_ptr;
3527 #ifdef CONFIG_QDIO_DEBUG
3528         char dbf_text[20];
3529
3530         sprintf(dbf_text,"doQD%04x",cdev->private->schid.sch_no);
3531         QDIO_DBF_TEXT3(0,trace,dbf_text);
3532 #endif /* CONFIG_QDIO_DEBUG */
3533
3534         if ( (qidx>QDIO_MAX_BUFFERS_PER_Q) ||
3535              (count>QDIO_MAX_BUFFERS_PER_Q) ||
3536              (queue_number>QDIO_MAX_QUEUES_PER_IRQ) )
3537                 return -EINVAL;
3538
3539         if (count==0)
3540                 return 0;
3541
3542         irq_ptr = cdev->private->qdio_data;
3543         if (!irq_ptr)
3544                 return -ENODEV;
3545
3546 #ifdef CONFIG_QDIO_DEBUG
3547         if (callflags&QDIO_FLAG_SYNC_INPUT)
3548                 QDIO_DBF_HEX3(0,trace,&irq_ptr->input_qs[queue_number],
3549                               sizeof(void*));
3550         else
3551                 QDIO_DBF_HEX3(0,trace,&irq_ptr->output_qs[queue_number],
3552                               sizeof(void*));
3553         sprintf(dbf_text,"flag%04x",callflags);
3554         QDIO_DBF_TEXT3(0,trace,dbf_text);
3555         sprintf(dbf_text,"qi%02xct%02x",qidx,count);
3556         QDIO_DBF_TEXT3(0,trace,dbf_text);
3557 #endif /* CONFIG_QDIO_DEBUG */
3558
3559         if (irq_ptr->state!=QDIO_IRQ_STATE_ACTIVE)
3560                 return -EBUSY;
3561
3562         if (callflags&QDIO_FLAG_SYNC_INPUT)
3563                 do_qdio_handle_inbound(irq_ptr->input_qs[queue_number],
3564                                        callflags, qidx, count, buffers);
3565         else if (callflags&QDIO_FLAG_SYNC_OUTPUT)
3566                 do_qdio_handle_outbound(irq_ptr->output_qs[queue_number],
3567                                         callflags, qidx, count, buffers);
3568         else {
3569                 QDIO_DBF_TEXT3(1,trace,"doQD:inv");
3570                 return -EINVAL;
3571         }
3572         return 0;
3573 }
3574
3575 static int
3576 qdio_perf_procfile_read(char *buffer, char **buffer_location, off_t offset,
3577                         int buffer_length, int *eof, void *data)
3578 {
3579         int c=0;
3580
3581         /* we are always called with buffer_length=4k, so we all
3582            deliver on the first read */
3583         if (offset>0)
3584                 return 0;
3585
3586 #define _OUTP_IT(x...) c+=sprintf(buffer+c,x)
3587 #ifdef CONFIG_64BIT
3588         _OUTP_IT("Number of tasklet runs (total)                  : %li\n",
3589                  (long)atomic64_read(&perf_stats.tl_runs));
3590         _OUTP_IT("Inbound tasklet runs      tried/retried         : %li/%li\n",
3591                  (long)atomic64_read(&perf_stats.inbound_tl_runs),
3592                  (long)atomic64_read(&perf_stats.inbound_tl_runs_resched));
3593         _OUTP_IT("Inbound-thin tasklet runs tried/retried         : %li/%li\n",
3594                  (long)atomic64_read(&perf_stats.inbound_thin_tl_runs),
3595                  (long)atomic64_read(&perf_stats.inbound_thin_tl_runs_resched));
3596         _OUTP_IT("Outbound tasklet runs     tried/retried         : %li/%li\n",
3597                  (long)atomic64_read(&perf_stats.outbound_tl_runs),
3598                  (long)atomic64_read(&perf_stats.outbound_tl_runs_resched));
3599         _OUTP_IT("\n");
3600         _OUTP_IT("Number of SIGA sync's issued                    : %li\n",
3601                  (long)atomic64_read(&perf_stats.siga_syncs));
3602         _OUTP_IT("Number of SIGA in's issued                      : %li\n",
3603                  (long)atomic64_read(&perf_stats.siga_ins));
3604         _OUTP_IT("Number of SIGA out's issued                     : %li\n",
3605                  (long)atomic64_read(&perf_stats.siga_outs));
3606         _OUTP_IT("Number of PCIs caught                           : %li\n",
3607                  (long)atomic64_read(&perf_stats.pcis));
3608         _OUTP_IT("Number of adapter interrupts caught             : %li\n",
3609                  (long)atomic64_read(&perf_stats.thinints));
3610         _OUTP_IT("Number of fast requeues (outg. SBALs w/o SIGA)  : %li\n",
3611                  (long)atomic64_read(&perf_stats.fast_reqs));
3612         _OUTP_IT("\n");
3613         _OUTP_IT("Number of inbound transfers                     : %li\n",
3614                  (long)atomic64_read(&perf_stats.inbound_cnt));
3615         _OUTP_IT("Number of do_QDIOs outbound                     : %li\n",
3616                  (long)atomic64_read(&perf_stats.outbound_cnt));
3617 #else /* CONFIG_64BIT */
3618         _OUTP_IT("Number of tasklet runs (total)                  : %i\n",
3619                  atomic_read(&perf_stats.tl_runs));
3620         _OUTP_IT("Inbound tasklet runs      tried/retried         : %i/%i\n",
3621                  atomic_read(&perf_stats.inbound_tl_runs),
3622                  atomic_read(&perf_stats.inbound_tl_runs_resched));
3623         _OUTP_IT("Inbound-thin tasklet runs tried/retried         : %i/%i\n",
3624                  atomic_read(&perf_stats.inbound_thin_tl_runs),
3625                  atomic_read(&perf_stats.inbound_thin_tl_runs_resched));
3626         _OUTP_IT("Outbound tasklet runs     tried/retried         : %i/%i\n",
3627                  atomic_read(&perf_stats.outbound_tl_runs),
3628                  atomic_read(&perf_stats.outbound_tl_runs_resched));
3629         _OUTP_IT("\n");
3630         _OUTP_IT("Number of SIGA sync's issued                    : %i\n",
3631                  atomic_read(&perf_stats.siga_syncs));
3632         _OUTP_IT("Number of SIGA in's issued                      : %i\n",
3633                  atomic_read(&perf_stats.siga_ins));
3634         _OUTP_IT("Number of SIGA out's issued                     : %i\n",
3635                  atomic_read(&perf_stats.siga_outs));
3636         _OUTP_IT("Number of PCIs caught                           : %i\n",
3637                  atomic_read(&perf_stats.pcis));
3638         _OUTP_IT("Number of adapter interrupts caught             : %i\n",
3639                  atomic_read(&perf_stats.thinints));
3640         _OUTP_IT("Number of fast requeues (outg. SBALs w/o SIGA)  : %i\n",
3641                  atomic_read(&perf_stats.fast_reqs));
3642         _OUTP_IT("\n");
3643         _OUTP_IT("Number of inbound transfers                     : %i\n",
3644                  atomic_read(&perf_stats.inbound_cnt));
3645         _OUTP_IT("Number of do_QDIOs outbound                     : %i\n",
3646                  atomic_read(&perf_stats.outbound_cnt));
3647 #endif /* CONFIG_64BIT */
3648         _OUTP_IT("\n");
3649
3650         return c;
3651 }
3652
3653 static struct proc_dir_entry *qdio_perf_proc_file;
3654
3655 static void
3656 qdio_add_procfs_entry(void)
3657 {
3658         proc_perf_file_registration=0;
3659         qdio_perf_proc_file=create_proc_entry(QDIO_PERF,
3660                                               S_IFREG|0444,&proc_root);
3661         if (qdio_perf_proc_file) {
3662                 qdio_perf_proc_file->read_proc=&qdio_perf_procfile_read;
3663         } else proc_perf_file_registration=-1;
3664
3665         if (proc_perf_file_registration)
3666                 QDIO_PRINT_WARN("was not able to register perf. " \
3667                                 "proc-file (%i).\n",
3668                                 proc_perf_file_registration);
3669 }
3670
3671 static void
3672 qdio_remove_procfs_entry(void)
3673 {
3674         if (!proc_perf_file_registration) /* means if it went ok earlier */
3675                 remove_proc_entry(QDIO_PERF,&proc_root);
3676 }
3677
3678 /**
3679  * attributes in sysfs
3680  *****************************************************************************/
3681
3682 static ssize_t
3683 qdio_performance_stats_show(struct bus_type *bus, char *buf)
3684 {
3685         return sprintf(buf, "%i\n", qdio_performance_stats ? 1 : 0);
3686 }
3687
3688 static ssize_t
3689 qdio_performance_stats_store(struct bus_type *bus, const char *buf, size_t count)
3690 {
3691         char *tmp;
3692         int i;
3693
3694         i = simple_strtoul(buf, &tmp, 16);
3695         if ((i == 0) || (i == 1)) {
3696                 if (i == qdio_performance_stats)
3697                         return count;
3698                 qdio_performance_stats = i;
3699                 if (i==0) {
3700                         /* reset perf. stat. info */
3701 #ifdef CONFIG_64BIT
3702                         atomic64_set(&perf_stats.tl_runs, 0);
3703                         atomic64_set(&perf_stats.outbound_tl_runs, 0);
3704                         atomic64_set(&perf_stats.inbound_tl_runs, 0);
3705                         atomic64_set(&perf_stats.inbound_tl_runs_resched, 0);
3706                         atomic64_set(&perf_stats.inbound_thin_tl_runs, 0);
3707                         atomic64_set(&perf_stats.inbound_thin_tl_runs_resched,
3708                                      0);
3709                         atomic64_set(&perf_stats.siga_outs, 0);
3710                         atomic64_set(&perf_stats.siga_ins, 0);
3711                         atomic64_set(&perf_stats.siga_syncs, 0);
3712                         atomic64_set(&perf_stats.pcis, 0);
3713                         atomic64_set(&perf_stats.thinints, 0);
3714                         atomic64_set(&perf_stats.fast_reqs, 0);
3715                         atomic64_set(&perf_stats.outbound_cnt, 0);
3716                         atomic64_set(&perf_stats.inbound_cnt, 0);
3717 #else /* CONFIG_64BIT */
3718                         atomic_set(&perf_stats.tl_runs, 0);
3719                         atomic_set(&perf_stats.outbound_tl_runs, 0);
3720                         atomic_set(&perf_stats.inbound_tl_runs, 0);
3721                         atomic_set(&perf_stats.inbound_tl_runs_resched, 0);
3722                         atomic_set(&perf_stats.inbound_thin_tl_runs, 0);
3723                         atomic_set(&perf_stats.inbound_thin_tl_runs_resched, 0);
3724                         atomic_set(&perf_stats.siga_outs, 0);
3725                         atomic_set(&perf_stats.siga_ins, 0);
3726                         atomic_set(&perf_stats.siga_syncs, 0);
3727                         atomic_set(&perf_stats.pcis, 0);
3728                         atomic_set(&perf_stats.thinints, 0);
3729                         atomic_set(&perf_stats.fast_reqs, 0);
3730                         atomic_set(&perf_stats.outbound_cnt, 0);
3731                         atomic_set(&perf_stats.inbound_cnt, 0);
3732 #endif /* CONFIG_64BIT */
3733                 }
3734         } else {
3735                 QDIO_PRINT_WARN("QDIO performance_stats: write 0 or 1 to this file!\n");
3736                 return -EINVAL;
3737         }
3738         return count;
3739 }
3740
3741 static BUS_ATTR(qdio_performance_stats, 0644, qdio_performance_stats_show,
3742                         qdio_performance_stats_store);
3743
3744 static void
3745 tiqdio_register_thinints(void)
3746 {
3747         char dbf_text[20];
3748         register_thinint_result=
3749                 s390_register_adapter_interrupt(&tiqdio_thinint_handler);
3750         if (register_thinint_result) {
3751                 sprintf(dbf_text,"regthn%x",(register_thinint_result&0xff));
3752                 QDIO_DBF_TEXT0(0,setup,dbf_text);
3753                 QDIO_PRINT_ERR("failed to register adapter handler " \
3754                                "(rc=%i).\nAdapter interrupts might " \
3755                                "not work. Continuing.\n",
3756                                register_thinint_result);
3757         }
3758 }
3759
3760 static void
3761 tiqdio_unregister_thinints(void)
3762 {
3763         if (!register_thinint_result)
3764                 s390_unregister_adapter_interrupt(&tiqdio_thinint_handler);
3765 }
3766
3767 static int
3768 qdio_get_qdio_memory(void)
3769 {
3770         int i;
3771         indicator_used[0]=1;
3772
3773         for (i=1;i<INDICATORS_PER_CACHELINE;i++)
3774                 indicator_used[i]=0;
3775         indicators = kzalloc(sizeof(__u32)*(INDICATORS_PER_CACHELINE),
3776                                    GFP_KERNEL);
3777         if (!indicators)
3778                 return -ENOMEM;
3779         return 0;
3780 }
3781
3782 static void
3783 qdio_release_qdio_memory(void)
3784 {
3785         kfree(indicators);
3786 }
3787
3788
3789 static void
3790 qdio_unregister_dbf_views(void)
3791 {
3792         if (qdio_dbf_setup)
3793                 debug_unregister(qdio_dbf_setup);
3794         if (qdio_dbf_sbal)
3795                 debug_unregister(qdio_dbf_sbal);
3796         if (qdio_dbf_sense)
3797                 debug_unregister(qdio_dbf_sense);
3798         if (qdio_dbf_trace)
3799                 debug_unregister(qdio_dbf_trace);
3800 #ifdef CONFIG_QDIO_DEBUG
3801         if (qdio_dbf_slsb_out)
3802                 debug_unregister(qdio_dbf_slsb_out);
3803         if (qdio_dbf_slsb_in)
3804                 debug_unregister(qdio_dbf_slsb_in);
3805 #endif /* CONFIG_QDIO_DEBUG */
3806 }
3807
3808 static int
3809 qdio_register_dbf_views(void)
3810 {
3811         qdio_dbf_setup=debug_register(QDIO_DBF_SETUP_NAME,
3812                                       QDIO_DBF_SETUP_PAGES,
3813                                       QDIO_DBF_SETUP_NR_AREAS,
3814                                       QDIO_DBF_SETUP_LEN);
3815         if (!qdio_dbf_setup)
3816                 goto oom;
3817         debug_register_view(qdio_dbf_setup,&debug_hex_ascii_view);
3818         debug_set_level(qdio_dbf_setup,QDIO_DBF_SETUP_LEVEL);
3819
3820         qdio_dbf_sbal=debug_register(QDIO_DBF_SBAL_NAME,
3821                                      QDIO_DBF_SBAL_PAGES,
3822                                      QDIO_DBF_SBAL_NR_AREAS,
3823                                      QDIO_DBF_SBAL_LEN);
3824         if (!qdio_dbf_sbal)
3825                 goto oom;
3826
3827         debug_register_view(qdio_dbf_sbal,&debug_hex_ascii_view);
3828         debug_set_level(qdio_dbf_sbal,QDIO_DBF_SBAL_LEVEL);
3829
3830         qdio_dbf_sense=debug_register(QDIO_DBF_SENSE_NAME,
3831                                       QDIO_DBF_SENSE_PAGES,
3832                                       QDIO_DBF_SENSE_NR_AREAS,
3833                                       QDIO_DBF_SENSE_LEN);
3834         if (!qdio_dbf_sense)
3835                 goto oom;
3836
3837         debug_register_view(qdio_dbf_sense,&debug_hex_ascii_view);
3838         debug_set_level(qdio_dbf_sense,QDIO_DBF_SENSE_LEVEL);
3839
3840         qdio_dbf_trace=debug_register(QDIO_DBF_TRACE_NAME,
3841                                       QDIO_DBF_TRACE_PAGES,
3842                                       QDIO_DBF_TRACE_NR_AREAS,
3843                                       QDIO_DBF_TRACE_LEN);
3844         if (!qdio_dbf_trace)
3845                 goto oom;
3846
3847         debug_register_view(qdio_dbf_trace,&debug_hex_ascii_view);
3848         debug_set_level(qdio_dbf_trace,QDIO_DBF_TRACE_LEVEL);
3849
3850 #ifdef CONFIG_QDIO_DEBUG
3851         qdio_dbf_slsb_out=debug_register(QDIO_DBF_SLSB_OUT_NAME,
3852                                          QDIO_DBF_SLSB_OUT_PAGES,
3853                                          QDIO_DBF_SLSB_OUT_NR_AREAS,
3854                                          QDIO_DBF_SLSB_OUT_LEN);
3855         if (!qdio_dbf_slsb_out)
3856                 goto oom;
3857         debug_register_view(qdio_dbf_slsb_out,&debug_hex_ascii_view);
3858         debug_set_level(qdio_dbf_slsb_out,QDIO_DBF_SLSB_OUT_LEVEL);
3859
3860         qdio_dbf_slsb_in=debug_register(QDIO_DBF_SLSB_IN_NAME,
3861                                         QDIO_DBF_SLSB_IN_PAGES,
3862                                         QDIO_DBF_SLSB_IN_NR_AREAS,
3863                                         QDIO_DBF_SLSB_IN_LEN);
3864         if (!qdio_dbf_slsb_in)
3865                 goto oom;
3866         debug_register_view(qdio_dbf_slsb_in,&debug_hex_ascii_view);
3867         debug_set_level(qdio_dbf_slsb_in,QDIO_DBF_SLSB_IN_LEVEL);
3868 #endif /* CONFIG_QDIO_DEBUG */
3869         return 0;
3870 oom:
3871         QDIO_PRINT_ERR("not enough memory for dbf.\n");
3872         qdio_unregister_dbf_views();
3873         return -ENOMEM;
3874 }
3875
3876 static void *qdio_mempool_alloc(gfp_t gfp_mask, void *size)
3877 {
3878         return (void *) get_zeroed_page(gfp_mask|GFP_DMA);
3879 }
3880
3881 static void qdio_mempool_free(void *element, void *size)
3882 {
3883         free_page((unsigned long) element);
3884 }
3885
3886 static int __init
3887 init_QDIO(void)
3888 {
3889         int res;
3890         void *ptr;
3891
3892         printk("qdio: loading %s\n",version);
3893
3894         res=qdio_get_qdio_memory();
3895         if (res)
3896                 return res;
3897
3898         res = qdio_register_dbf_views();
3899         if (res)
3900                 return res;
3901
3902         QDIO_DBF_TEXT0(0,setup,"initQDIO");
3903         res = bus_create_file(&ccw_bus_type, &bus_attr_qdio_performance_stats);
3904
3905         memset((void*)&perf_stats,0,sizeof(perf_stats));
3906         QDIO_DBF_TEXT0(0,setup,"perfstat");
3907         ptr=&perf_stats;
3908         QDIO_DBF_HEX0(0,setup,&ptr,sizeof(void*));
3909
3910         qdio_add_procfs_entry();
3911
3912         qdio_mempool_scssc = mempool_create(QDIO_MEMPOOL_SCSSC_ELEMENTS,
3913                                             qdio_mempool_alloc,
3914                                             qdio_mempool_free, NULL);
3915
3916         if (tiqdio_check_chsc_availability())
3917                 QDIO_PRINT_ERR("Not all CHSCs supported. Continuing.\n");
3918
3919         tiqdio_register_thinints();
3920
3921         return 0;
3922  }
3923
3924 static void __exit
3925 cleanup_QDIO(void)
3926 {
3927         tiqdio_unregister_thinints();
3928         qdio_remove_procfs_entry();
3929         qdio_release_qdio_memory();
3930         qdio_unregister_dbf_views();
3931         mempool_destroy(qdio_mempool_scssc);
3932         bus_remove_file(&ccw_bus_type, &bus_attr_qdio_performance_stats);
3933         printk("qdio: %s: module removed\n",version);
3934 }
3935
3936 module_init(init_QDIO);
3937 module_exit(cleanup_QDIO);
3938
3939 EXPORT_SYMBOL(qdio_allocate);
3940 EXPORT_SYMBOL(qdio_establish);
3941 EXPORT_SYMBOL(qdio_initialize);
3942 EXPORT_SYMBOL(qdio_activate);
3943 EXPORT_SYMBOL(do_QDIO);
3944 EXPORT_SYMBOL(qdio_shutdown);
3945 EXPORT_SYMBOL(qdio_free);
3946 EXPORT_SYMBOL(qdio_cleanup);
3947 EXPORT_SYMBOL(qdio_synchronize);