drivers/s390/cio/qdio.c

   1 /*
   2  *
   3  * linux/drivers/s390/cio/qdio.c
   4  *
   5  * Linux for S/390 QDIO base support, Hipersocket base support
   6  * version 2
   7  *
   8  * Copyright 2000,2002 IBM Corporation
   9  * Author(s):             Utz Bacher <utz.bacher@de.ibm.com>
  10  * 2.6 cio integration by Cornelia Huck <cornelia.huck@de.ibm.com>
  11  *
  12  * Restriction: only 63 iqdio subchannels would have its own indicator,
  13  * after that, subsequent subchannels share one indicator
  14  *
  15  *
  16  *
  17  *
  18  * This program is free software; you can redistribute it and/or modify
  19  * it under the terms of the GNU General Public License as published by
  20  * the Free Software Foundation; either version 2, or (at your option)
  21  * any later version.
  22  *
  23  * This program is distributed in the hope that it will be useful,
  24  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  25  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  26  * GNU General Public License for more details.
  27  *
  28  * You should have received a copy of the GNU General Public License
  29  * along with this program; if not, write to the Free Software
  30  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  31  */
  32
  33 #include <linux/module.h>
  34 #include <linux/init.h>
  35
  36 #include <linux/slab.h>
  37 #include <linux/kernel.h>
  38 #include <linux/proc_fs.h>
  39 #include <linux/timer.h>
  40 #include <linux/mempool.h>
  41
  42 #include <asm/ccwdev.h>
  43 #include <asm/io.h>
  44 #include <asm/atomic.h>
  45 #include <asm/semaphore.h>
  46 #include <asm/timex.h>
  47
  48 #include <asm/debug.h>
  49 #include <asm/s390_rdev.h>
  50 #include <asm/qdio.h>
  51
  52 #include "cio.h"
  53 #include "css.h"
  54 #include "device.h"
  55 #include "airq.h"
  56 #include "qdio.h"
  57 #include "ioasm.h"
  58 #include "chsc.h"
  59
  60 /****************** MODULE PARAMETER VARIABLES ********************/
  61 MODULE_AUTHOR("Utz Bacher <utz.bacher@de.ibm.com>");
  62 MODULE_DESCRIPTION("QDIO base support version 2, " \
  63                    "Copyright 2000 IBM Corporation");
  64 MODULE_LICENSE("GPL");
  65
  66 /******************** HERE WE GO ***********************************/
  67
  68 static const char version[] = "QDIO base support version 2";
  69
  70 static int qdio_performance_stats = 0;
  71 static int proc_perf_file_registration;
  72 static struct qdio_perf_stats perf_stats;
  73
  74 static int hydra_thinints;
  75 static int is_passthrough = 0;
  76 static int omit_svs;
  77
  78 static int indicator_used[INDICATORS_PER_CACHELINE];
  79 static __u32 * volatile indicators;
  80 static __u32 volatile spare_indicator;
  81 static atomic_t spare_indicator_usecount;
  82 #define QDIO_MEMPOOL_SCSSC_ELEMENTS 2
  83 static mempool_t *qdio_mempool_scssc;
  84 static struct kmem_cache *qdio_q_cache;
  85
  86 static debug_info_t *qdio_dbf_setup;
  87 static debug_info_t *qdio_dbf_sbal;
  88 static debug_info_t *qdio_dbf_trace;
  89 static debug_info_t *qdio_dbf_sense;
  90 #ifdef CONFIG_QDIO_DEBUG
  91 static debug_info_t *qdio_dbf_slsb_out;
  92 static debug_info_t *qdio_dbf_slsb_in;
  93 #endif /* CONFIG_QDIO_DEBUG */
  94
  95 /* iQDIO stuff: */
  96 static volatile struct qdio_q *tiq_list=NULL; /* volatile as it could change
  97                                                  during a while loop */
  98 static DEFINE_SPINLOCK(ttiq_list_lock);
  99 static int register_thinint_result;
 100 static void tiqdio_tl(unsigned long);
 101 static DECLARE_TASKLET(tiqdio_tasklet,tiqdio_tl,0);
 102
 103 /* not a macro, as one of the arguments is atomic_read */
 104 static inline int
 105 qdio_min(int a,int b)
 106 {
 107         if (a<b)
 108                 return a;
 109         else
 110                 return b;
 111 }
 112
 113 /***************** SCRUBBER HELPER ROUTINES **********************/
 114 #ifdef CONFIG_64BIT
 115 static inline void qdio_perf_stat_inc(atomic64_t *count)
 116 {
 117         if (qdio_performance_stats)
 118                 atomic64_inc(count);
 119 }
 120
 121 static inline void qdio_perf_stat_dec(atomic64_t *count)
 122 {
 123         if (qdio_performance_stats)
 124                 atomic64_dec(count);
 125 }
 126 #else /* CONFIG_64BIT */
 127 static inline void qdio_perf_stat_inc(atomic_t *count)
 128 {
 129         if (qdio_performance_stats)
 130                 atomic_inc(count);
 131 }
 132
 133 static inline void qdio_perf_stat_dec(atomic_t *count)
 134 {
 135         if (qdio_performance_stats)
 136                 atomic_dec(count);
 137 }
 138 #endif /* CONFIG_64BIT */
 139
 140 static inline __u64
 141 qdio_get_micros(void)
 142 {
 143         return (get_clock() >> 12); /* time>>12 is microseconds */
 144 }
 145
 146 /*
 147  * unfortunately, we can't just xchg the values; in do_QDIO we want to reserve
 148  * the q in any case, so that we'll not be interrupted when we are in
 149  * qdio_mark_tiq... shouldn't have a really bad impact, as reserving almost
 150  * ever works (last famous words)
 151  */
 152 static inline int
 153 qdio_reserve_q(struct qdio_q *q)
 154 {
 155         return atomic_add_return(1,&q->use_count) - 1;
 156 }
 157
 158 static inline void
 159 qdio_release_q(struct qdio_q *q)
 160 {
 161         atomic_dec(&q->use_count);
 162 }
 163
 164 /*check ccq  */
 165 static int
 166 qdio_check_ccq(struct qdio_q *q, unsigned int ccq)
 167 {
 168         char dbf_text[15];
 169
 170         if (ccq == 0 || ccq == 32)
 171                 return 0;
 172         if (ccq == 96 || ccq == 97)
 173                 return 1;
 174         /*notify devices immediately*/
 175         sprintf(dbf_text,"%d", ccq);
 176         QDIO_DBF_TEXT2(1,trace,dbf_text);
 177         return -EIO;
 178 }
 179 /* EQBS: extract buffer states */
 180 static int
 181 qdio_do_eqbs(struct qdio_q *q, unsigned char *state,
 182              unsigned int *start, unsigned int *cnt)
 183 {
 184         struct qdio_irq *irq;
 185         unsigned int tmp_cnt, q_no, ccq;
 186         int rc ;
 187         char dbf_text[15];
 188
 189         ccq = 0;
 190         tmp_cnt = *cnt;
 191         irq = (struct qdio_irq*)q->irq_ptr;
 192         q_no = q->q_no;
 193         if(!q->is_input_q)
 194                 q_no += irq->no_input_qs;
 195 again:
 196         ccq = do_eqbs(irq->sch_token, state, q_no, start, cnt);
 197         rc = qdio_check_ccq(q, ccq);
 198         if (rc == 1) {
 199                 QDIO_DBF_TEXT5(1,trace,"eqAGAIN");
 200                 goto again;
 201         }
 202         if (rc < 0) {
 203                 QDIO_DBF_TEXT2(1,trace,"eqberr");
 204                 sprintf(dbf_text,"%2x,%2x,%d,%d",tmp_cnt, *cnt, ccq, q_no);
 205                 QDIO_DBF_TEXT2(1,trace,dbf_text);
 206                 q->handler(q->cdev,QDIO_STATUS_ACTIVATE_CHECK_CONDITION|
 207                                 QDIO_STATUS_LOOK_FOR_ERROR,
 208                                 0, 0, 0, -1, -1, q->int_parm);
 209                 return 0;
 210         }
 211         return (tmp_cnt - *cnt);
 212 }
 213
 214 /* SQBS: set buffer states */
 215 static int
 216 qdio_do_sqbs(struct qdio_q *q, unsigned char state,
 217              unsigned int *start, unsigned int *cnt)
 218 {
 219         struct qdio_irq *irq;
 220         unsigned int tmp_cnt, q_no, ccq;
 221         int rc;
 222         char dbf_text[15];
 223
 224         ccq = 0;
 225         tmp_cnt = *cnt;
 226         irq = (struct qdio_irq*)q->irq_ptr;
 227         q_no = q->q_no;
 228         if(!q->is_input_q)
 229                 q_no += irq->no_input_qs;
 230 again:
 231         ccq = do_sqbs(irq->sch_token, state, q_no, start, cnt);
 232         rc = qdio_check_ccq(q, ccq);
 233         if (rc == 1) {
 234                 QDIO_DBF_TEXT5(1,trace,"sqAGAIN");
 235                 goto again;
 236         }
 237         if (rc < 0) {
 238                 QDIO_DBF_TEXT3(1,trace,"sqberr");
 239                 sprintf(dbf_text,"%2x,%2x",tmp_cnt,*cnt);
 240                 QDIO_DBF_TEXT3(1,trace,dbf_text);
 241                 sprintf(dbf_text,"%d,%d",ccq,q_no);
 242                 QDIO_DBF_TEXT3(1,trace,dbf_text);
 243                 q->handler(q->cdev,QDIO_STATUS_ACTIVATE_CHECK_CONDITION|
 244                                 QDIO_STATUS_LOOK_FOR_ERROR,
 245                                 0, 0, 0, -1, -1, q->int_parm);
 246                 return 0;
 247         }
 248         return (tmp_cnt - *cnt);
 249 }
 250
 251 static inline int
 252 qdio_set_slsb(struct qdio_q *q, unsigned int *bufno,
 253               unsigned char state, unsigned int *count)
 254 {
 255         volatile char *slsb;
 256         struct qdio_irq *irq;
 257
 258         irq = (struct qdio_irq*)q->irq_ptr;
 259         if (!irq->is_qebsm) {
 260                 slsb = (char *)&q->slsb.acc.val[(*bufno)];
 261                 xchg(slsb, state);
 262                 return 1;
 263         }
 264         return qdio_do_sqbs(q, state, bufno, count);
 265 }
 266
 267 #ifdef CONFIG_QDIO_DEBUG
 268 static inline void
 269 qdio_trace_slsb(struct qdio_q *q)
 270 {
 271         if (q->queue_type==QDIO_TRACE_QTYPE) {
 272                 if (q->is_input_q)
 273                         QDIO_DBF_HEX2(0,slsb_in,&q->slsb,
 274                                       QDIO_MAX_BUFFERS_PER_Q);
 275                 else
 276                         QDIO_DBF_HEX2(0,slsb_out,&q->slsb,
 277                                       QDIO_MAX_BUFFERS_PER_Q);
 278         }
 279 }
 280 #endif
 281
 282 static inline int
 283 set_slsb(struct qdio_q *q, unsigned int *bufno,
 284          unsigned char state, unsigned int *count)
 285 {
 286         int rc;
 287 #ifdef CONFIG_QDIO_DEBUG
 288         qdio_trace_slsb(q);
 289 #endif
 290         rc = qdio_set_slsb(q, bufno, state, count);
 291 #ifdef CONFIG_QDIO_DEBUG
 292         qdio_trace_slsb(q);
 293 #endif
 294         return rc;
 295 }
 296 static inline int
 297 qdio_siga_sync(struct qdio_q *q, unsigned int gpr2,
 298                unsigned int gpr3)
 299 {
 300         int cc;
 301
 302         QDIO_DBF_TEXT4(0,trace,"sigasync");
 303         QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
 304
 305         qdio_perf_stat_inc(&perf_stats.siga_syncs);
 306
 307         cc = do_siga_sync(q->schid, gpr2, gpr3);
 308         if (cc)
 309                 QDIO_DBF_HEX3(0,trace,&cc,sizeof(int*));
 310
 311         return cc;
 312 }
 313
 314 static inline int
 315 qdio_siga_sync_q(struct qdio_q *q)
 316 {
 317         if (q->is_input_q)
 318                 return qdio_siga_sync(q, 0, q->mask);
 319         return qdio_siga_sync(q, q->mask, 0);
 320 }
 321
 322 static int
 323 __do_siga_output(struct qdio_q *q, unsigned int *busy_bit)
 324 {
 325        struct qdio_irq *irq;
 326        unsigned int fc = 0;
 327        unsigned long schid;
 328
 329        irq = (struct qdio_irq *) q->irq_ptr;
 330        if (!irq->is_qebsm)
 331                schid = *((u32 *)&q->schid);
 332        else {
 333                schid = irq->sch_token;
 334                fc |= 0x80;
 335        }
 336        return do_siga_output(schid, q->mask, busy_bit, fc);
 337 }
 338
 339 /*
 340  * returns QDIO_SIGA_ERROR_ACCESS_EXCEPTION as cc, when SIGA returns
 341  * an access exception
 342  */
 343 static int
 344 qdio_siga_output(struct qdio_q *q)
 345 {
 346         int cc;
 347         __u32 busy_bit;
 348         __u64 start_time=0;
 349
 350         qdio_perf_stat_inc(&perf_stats.siga_outs);
 351
 352         QDIO_DBF_TEXT4(0,trace,"sigaout");
 353         QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
 354
 355         for (;;) {
 356                 cc = __do_siga_output(q, &busy_bit);
 357 //QDIO_PRINT_ERR("cc=%x, busy=%x\n",cc,busy_bit);
 358                 if ((cc==2) && (busy_bit) && (q->is_iqdio_q)) {
 359                         if (!start_time)
 360                                 start_time=NOW;
 361                         if ((NOW-start_time)>QDIO_BUSY_BIT_PATIENCE)
 362                                 break;
 363                 } else
 364                         break;
 365         }
 366
 367         if ((cc==2) && (busy_bit))
 368                 cc |= QDIO_SIGA_ERROR_B_BIT_SET;
 369
 370         if (cc)
 371                 QDIO_DBF_HEX3(0,trace,&cc,sizeof(int*));
 372
 373         return cc;
 374 }
 375
 376 static int
 377 qdio_siga_input(struct qdio_q *q)
 378 {
 379         int cc;
 380
 381         QDIO_DBF_TEXT4(0,trace,"sigain");
 382         QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
 383
 384         qdio_perf_stat_inc(&perf_stats.siga_ins);
 385
 386         cc = do_siga_input(q->schid, q->mask);
 387
 388         if (cc)
 389                 QDIO_DBF_HEX3(0,trace,&cc,sizeof(int*));
 390
 391         return cc;
 392 }
 393
 394 /* locked by the locks in qdio_activate and qdio_cleanup */
 395 static __u32 *
 396 qdio_get_indicator(void)
 397 {
 398         int i;
 399
 400         for (i=1;i<INDICATORS_PER_CACHELINE;i++)
 401                 if (!indicator_used[i]) {
 402                         indicator_used[i]=1;
 403                         return indicators+i;
 404                 }
 405         atomic_inc(&spare_indicator_usecount);
 406         return (__u32 * volatile) &spare_indicator;
 407 }
 408
 409 /* locked by the locks in qdio_activate and qdio_cleanup */
 410 static void
 411 qdio_put_indicator(__u32 *addr)
 412 {
 413         int i;
 414
 415         if ( (addr) && (addr!=&spare_indicator) ) {
 416                 i=addr-indicators;
 417                 indicator_used[i]=0;
 418         }
 419         if (addr == &spare_indicator)
 420                 atomic_dec(&spare_indicator_usecount);
 421 }
 422
 423 static inline void
 424 tiqdio_clear_summary_bit(__u32 *location)
 425 {
 426         QDIO_DBF_TEXT5(0,trace,"clrsummb");
 427         QDIO_DBF_HEX5(0,trace,&location,sizeof(void*));
 428
 429         xchg(location,0);
 430 }
 431
 432 static inline  void
 433 tiqdio_set_summary_bit(__u32 *location)
 434 {
 435         QDIO_DBF_TEXT5(0,trace,"setsummb");
 436         QDIO_DBF_HEX5(0,trace,&location,sizeof(void*));
 437
 438         xchg(location,-1);
 439 }
 440
 441 static inline void
 442 tiqdio_sched_tl(void)
 443 {
 444         tasklet_hi_schedule(&tiqdio_tasklet);
 445 }
 446
 447 static void
 448 qdio_mark_tiq(struct qdio_q *q)
 449 {
 450         unsigned long flags;
 451
 452         QDIO_DBF_TEXT4(0,trace,"mark iq");
 453         QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
 454
 455         spin_lock_irqsave(&ttiq_list_lock,flags);
 456         if (unlikely(atomic_read(&q->is_in_shutdown)))
 457                 goto out_unlock;
 458
 459         if (!q->is_input_q)
 460                 goto out_unlock;
 461
 462         if ((q->list_prev) || (q->list_next))
 463                 goto out_unlock;
 464
 465         if (!tiq_list) {
 466                 tiq_list=q;
 467                 q->list_prev=q;
 468                 q->list_next=q;
 469         } else {
 470                 q->list_next=tiq_list;
 471                 q->list_prev=tiq_list->list_prev;
 472                 tiq_list->list_prev->list_next=q;
 473                 tiq_list->list_prev=q;
 474         }
 475         spin_unlock_irqrestore(&ttiq_list_lock,flags);
 476
 477         tiqdio_set_summary_bit((__u32*)q->dev_st_chg_ind);
 478         tiqdio_sched_tl();
 479         return;
 480 out_unlock:
 481         spin_unlock_irqrestore(&ttiq_list_lock,flags);
 482         return;
 483 }
 484
 485 static inline void
 486 qdio_mark_q(struct qdio_q *q)
 487 {
 488         QDIO_DBF_TEXT4(0,trace,"mark q");
 489         QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
 490
 491         if (unlikely(atomic_read(&q->is_in_shutdown)))
 492                 return;
 493
 494         tasklet_schedule(&q->tasklet);
 495 }
 496
 497 static int
 498 qdio_stop_polling(struct qdio_q *q)
 499 {
 500 #ifdef QDIO_USE_PROCESSING_STATE
 501        unsigned int tmp, gsf, count = 1;
 502        unsigned char state = 0;
 503        struct qdio_irq *irq = (struct qdio_irq *) q->irq_ptr;
 504
 505         if (!atomic_xchg(&q->polling,0))
 506                 return 1;
 507
 508         QDIO_DBF_TEXT4(0,trace,"stoppoll");
 509         QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
 510
 511         /* show the card that we are not polling anymore */
 512         if (!q->is_input_q)
 513                 return 1;
 514
 515        tmp = gsf = GET_SAVED_FRONTIER(q);
 516        tmp = ((tmp + QDIO_MAX_BUFFERS_PER_Q-1) & (QDIO_MAX_BUFFERS_PER_Q-1) );
 517        set_slsb(q, &tmp, SLSB_P_INPUT_NOT_INIT, &count);
 518
 519         /*
 520          * we don't issue this SYNC_MEMORY, as we trust Rick T and
 521          * moreover will not use the PROCESSING state under VM, so
 522          * q->polling was 0 anyway
 523          */
 524         /*SYNC_MEMORY;*/
 525        if (irq->is_qebsm) {
 526                count = 1;
 527                qdio_do_eqbs(q, &state, &gsf, &count);
 528        } else
 529                state = q->slsb.acc.val[gsf];
 530        if (state != SLSB_P_INPUT_PRIMED)
 531                 return 1;
 532         /*
 533          * set our summary bit again, as otherwise there is a
 534          * small window we can miss between resetting it and
 535          * checking for PRIMED state
 536          */
 537         if (q->is_thinint_q)
 538                 tiqdio_set_summary_bit((__u32*)q->dev_st_chg_ind);
 539         return 0;
 540
 541 #else /* QDIO_USE_PROCESSING_STATE */
 542         return 1;
 543 #endif /* QDIO_USE_PROCESSING_STATE */
 544 }
 545
 546 /*
 547  * see the comment in do_QDIO and before qdio_reserve_q about the
 548  * sophisticated locking outside of unmark_q, so that we don't need to
 549  * disable the interrupts :-)
 550 */
 551 static void
 552 qdio_unmark_q(struct qdio_q *q)
 553 {
 554         unsigned long flags;
 555
 556         QDIO_DBF_TEXT4(0,trace,"unmark q");
 557         QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
 558
 559         if ((!q->list_prev)||(!q->list_next))
 560                 return;
 561
 562         if ((q->is_thinint_q)&&(q->is_input_q)) {
 563                 /* iQDIO */
 564                 spin_lock_irqsave(&ttiq_list_lock,flags);
 565                 /* in case cleanup has done this already and simultanously
 566                  * qdio_unmark_q is called from the interrupt handler, we've
 567                  * got to check this in this specific case again */
 568                 if ((!q->list_prev)||(!q->list_next))
 569                         goto out;
 570                 if (q->list_next==q) {
 571                         /* q was the only interesting q */
 572                         tiq_list=NULL;
 573                         q->list_next=NULL;
 574                         q->list_prev=NULL;
 575                 } else {
 576                         q->list_next->list_prev=q->list_prev;
 577                         q->list_prev->list_next=q->list_next;
 578                         tiq_list=q->list_next;
 579                         q->list_next=NULL;
 580                         q->list_prev=NULL;
 581                 }
 582 out:
 583                 spin_unlock_irqrestore(&ttiq_list_lock,flags);
 584         }
 585 }
 586
 587 static inline unsigned long
 588 tiqdio_clear_global_summary(void)
 589 {
 590         unsigned long time;
 591
 592         QDIO_DBF_TEXT5(0,trace,"clrglobl");
 593
 594         time = do_clear_global_summary();
 595
 596         QDIO_DBF_HEX5(0,trace,&time,sizeof(unsigned long));
 597
 598         return time;
 599 }
 600
 601
 602 /************************* OUTBOUND ROUTINES *******************************/
 603 static int
 604 qdio_qebsm_get_outbound_buffer_frontier(struct qdio_q *q)
 605 {
 606         struct qdio_irq *irq;
 607         unsigned char state;
 608         unsigned int cnt, count, ftc;
 609
 610         irq = (struct qdio_irq *) q->irq_ptr;
 611         if ((!q->is_iqdio_q) && (!q->hydra_gives_outbound_pcis))
 612                 SYNC_MEMORY;
 613
 614         ftc = q->first_to_check;
 615         count = qdio_min(atomic_read(&q->number_of_buffers_used),
 616                         (QDIO_MAX_BUFFERS_PER_Q-1));
 617         if (count == 0)
 618                 return q->first_to_check;
 619         cnt = qdio_do_eqbs(q, &state, &ftc, &count);
 620         if (cnt == 0)
 621                 return q->first_to_check;
 622         switch (state) {
 623         case SLSB_P_OUTPUT_ERROR:
 624                 QDIO_DBF_TEXT3(0,trace,"outperr");
 625                 atomic_sub(cnt , &q->number_of_buffers_used);
 626                 if (q->qdio_error)
 627                         q->error_status_flags |=
 628                                 QDIO_STATUS_MORE_THAN_ONE_QDIO_ERROR;
 629                 q->qdio_error = SLSB_P_OUTPUT_ERROR;
 630                 q->error_status_flags |= QDIO_STATUS_LOOK_FOR_ERROR;
 631                 q->first_to_check = ftc;
 632                 break;
 633         case SLSB_P_OUTPUT_EMPTY:
 634                 QDIO_DBF_TEXT5(0,trace,"outpempt");
 635                 atomic_sub(cnt, &q->number_of_buffers_used);
 636                 q->first_to_check = ftc;
 637                 break;
 638         case SLSB_CU_OUTPUT_PRIMED:
 639                 /* all buffers primed */
 640                 QDIO_DBF_TEXT5(0,trace,"outpprim");
 641                 break;
 642         default:
 643                 break;
 644         }
 645         QDIO_DBF_HEX4(0,trace,&q->first_to_check,sizeof(int));
 646         return q->first_to_check;
 647 }
 648
 649 static int
 650 qdio_qebsm_get_inbound_buffer_frontier(struct qdio_q *q)
 651 {
 652         struct qdio_irq *irq;
 653         unsigned char state;
 654         int tmp, ftc, count, cnt;
 655         char dbf_text[15];
 656
 657
 658         irq = (struct qdio_irq *) q->irq_ptr;
 659         ftc = q->first_to_check;
 660         count = qdio_min(atomic_read(&q->number_of_buffers_used),
 661                         (QDIO_MAX_BUFFERS_PER_Q-1));
 662         if (count == 0)
 663                  return q->first_to_check;
 664         cnt = qdio_do_eqbs(q, &state, &ftc, &count);
 665         if (cnt == 0)
 666                  return q->first_to_check;
 667         switch (state) {
 668         case SLSB_P_INPUT_ERROR :
 669 #ifdef CONFIG_QDIO_DEBUG
 670                 QDIO_DBF_TEXT3(1,trace,"inperr");
 671                 sprintf(dbf_text,"%2x,%2x",ftc,count);
 672                 QDIO_DBF_TEXT3(1,trace,dbf_text);
 673 #endif /* CONFIG_QDIO_DEBUG */
 674                 if (q->qdio_error)
 675                         q->error_status_flags |=
 676                                 QDIO_STATUS_MORE_THAN_ONE_QDIO_ERROR;
 677                 q->qdio_error = SLSB_P_INPUT_ERROR;
 678                 q->error_status_flags |= QDIO_STATUS_LOOK_FOR_ERROR;
 679                 atomic_sub(cnt, &q->number_of_buffers_used);
 680                 q->first_to_check = ftc;
 681                 break;
 682         case SLSB_P_INPUT_PRIMED :
 683                 QDIO_DBF_TEXT3(0,trace,"inptprim");
 684                 sprintf(dbf_text,"%2x,%2x",ftc,count);
 685                 QDIO_DBF_TEXT3(1,trace,dbf_text);
 686                 tmp = 0;
 687                 ftc = q->first_to_check;
 688 #ifdef QDIO_USE_PROCESSING_STATE
 689                 if (cnt > 1) {
 690                         cnt -= 1;
 691                         tmp = set_slsb(q, &ftc, SLSB_P_INPUT_NOT_INIT, &cnt);
 692                         if (!tmp)
 693                                 break;
 694                 }
 695                 cnt = 1;
 696                 tmp += set_slsb(q, &ftc,
 697                                SLSB_P_INPUT_PROCESSING, &cnt);
 698                 atomic_set(&q->polling, 1);
 699 #else
 700                 tmp = set_slsb(q, &ftc, SLSB_P_INPUT_NOT_INIT, &cnt);
 701 #endif
 702                 atomic_sub(tmp, &q->number_of_buffers_used);
 703                 q->first_to_check = ftc;
 704                 break;
 705         case SLSB_CU_INPUT_EMPTY:
 706         case SLSB_P_INPUT_NOT_INIT:
 707         case SLSB_P_INPUT_PROCESSING:
 708                 QDIO_DBF_TEXT5(0,trace,"inpnipro");
 709                 break;
 710         default:
 711                 break;
 712         }
 713         QDIO_DBF_HEX4(0,trace,&q->first_to_check,sizeof(int));
 714         return q->first_to_check;
 715 }
 716
 717 static int
 718 qdio_get_outbound_buffer_frontier(struct qdio_q *q)
 719 {
 720         struct qdio_irq *irq;
 721         volatile char *slsb;
 722         unsigned int count = 1;
 723         int first_not_to_check, f, f_mod_no;
 724         char dbf_text[15];
 725
 726         QDIO_DBF_TEXT4(0,trace,"getobfro");
 727         QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
 728
 729         irq = (struct qdio_irq *) q->irq_ptr;
 730         if (irq->is_qebsm)
 731                 return qdio_qebsm_get_outbound_buffer_frontier(q);
 732
 733         slsb=&q->slsb.acc.val[0];
 734         f_mod_no=f=q->first_to_check;
 735         /*
 736          * f points to already processed elements, so f+no_used is correct...
 737          * ... but: we don't check 128 buffers, as otherwise
 738          * qdio_has_outbound_q_moved would return 0
 739          */
 740         first_not_to_check=f+qdio_min(atomic_read(&q->number_of_buffers_used),
 741                                       (QDIO_MAX_BUFFERS_PER_Q-1));
 742
 743         if ((!q->is_iqdio_q)&&(!q->hydra_gives_outbound_pcis))
 744                 SYNC_MEMORY;
 745
 746 check_next:
 747         if (f==first_not_to_check)
 748                 goto out;
 749
 750         switch(slsb[f_mod_no]) {
 751
 752         /* the adapter has not fetched the output yet */
 753         case SLSB_CU_OUTPUT_PRIMED:
 754                 QDIO_DBF_TEXT5(0,trace,"outpprim");
 755                 break;
 756
 757         /* the adapter got it */
 758         case SLSB_P_OUTPUT_EMPTY:
 759                 atomic_dec(&q->number_of_buffers_used);
 760                 f++;
 761                 f_mod_no=f&(QDIO_MAX_BUFFERS_PER_Q-1);
 762                 QDIO_DBF_TEXT5(0,trace,"outpempt");
 763                 goto check_next;
 764
 765         case SLSB_P_OUTPUT_ERROR:
 766                 QDIO_DBF_TEXT3(0,trace,"outperr");
 767                 sprintf(dbf_text,"%x-%x-%x",f_mod_no,
 768                         q->sbal[f_mod_no]->element[14].sbalf.value,
 769                         q->sbal[f_mod_no]->element[15].sbalf.value);
 770                 QDIO_DBF_TEXT3(1,trace,dbf_text);
 771                 QDIO_DBF_HEX2(1,sbal,q->sbal[f_mod_no],256);
 772
 773                 /* kind of process the buffer */
 774                 set_slsb(q, &f_mod_no, SLSB_P_OUTPUT_NOT_INIT, &count);
 775
 776                 /*
 777                  * we increment the frontier, as this buffer
 778                  * was processed obviously
 779                  */
 780                 atomic_dec(&q->number_of_buffers_used);
 781                 f_mod_no=(f_mod_no+1)&(QDIO_MAX_BUFFERS_PER_Q-1);
 782
 783                 if (q->qdio_error)
 784                         q->error_status_flags|=
 785                                 QDIO_STATUS_MORE_THAN_ONE_QDIO_ERROR;
 786                 q->qdio_error=SLSB_P_OUTPUT_ERROR;
 787                 q->error_status_flags|=QDIO_STATUS_LOOK_FOR_ERROR;
 788
 789                 break;
 790
 791         /* no new buffers */
 792         default:
 793                 QDIO_DBF_TEXT5(0,trace,"outpni");
 794         }
 795 out:
 796         return (q->first_to_check=f_mod_no);
 797 }
 798
 799 /* all buffers are processed */
 800 static int
 801 qdio_is_outbound_q_done(struct qdio_q *q)
 802 {
 803         int no_used;
 804 #ifdef CONFIG_QDIO_DEBUG
 805         char dbf_text[15];
 806 #endif
 807
 808         no_used=atomic_read(&q->number_of_buffers_used);
 809
 810 #ifdef CONFIG_QDIO_DEBUG
 811         if (no_used) {
 812                 sprintf(dbf_text,"oqisnt%02x",no_used);
 813                 QDIO_DBF_TEXT4(0,trace,dbf_text);
 814         } else {
 815                 QDIO_DBF_TEXT4(0,trace,"oqisdone");
 816         }
 817         QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
 818 #endif /* CONFIG_QDIO_DEBUG */
 819         return (no_used==0);
 820 }
 821
 822 static int
 823 qdio_has_outbound_q_moved(struct qdio_q *q)
 824 {
 825         int i;
 826
 827         i=qdio_get_outbound_buffer_frontier(q);
 828
 829         if ( (i!=GET_SAVED_FRONTIER(q)) ||
 830              (q->error_status_flags&QDIO_STATUS_LOOK_FOR_ERROR) ) {
 831                 SAVE_FRONTIER(q,i);
 832                 QDIO_DBF_TEXT4(0,trace,"oqhasmvd");
 833                 QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
 834                 return 1;
 835         } else {
 836                 QDIO_DBF_TEXT4(0,trace,"oqhsntmv");
 837                 QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
 838                 return 0;
 839         }
 840 }
 841
 842 static void
 843 qdio_kick_outbound_q(struct qdio_q *q)
 844 {
 845         int result;
 846 #ifdef CONFIG_QDIO_DEBUG
 847         char dbf_text[15];
 848
 849         QDIO_DBF_TEXT4(0,trace,"kickoutq");
 850         QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
 851 #endif /* CONFIG_QDIO_DEBUG */
 852
 853         if (!q->siga_out)
 854                 return;
 855
 856         /* here's the story with cc=2 and busy bit set (thanks, Rick):
 857          * VM's CP could present us cc=2 and busy bit set on SIGA-write
 858          * during reconfiguration of their Guest LAN (only in HIPERS mode,
 859          * QDIO mode is asynchronous -- cc=2 and busy bit there will take
 860          * the queues down immediately; and not being under VM we have a
 861          * problem on cc=2 and busy bit set right away).
 862          *
 863          * Therefore qdio_siga_output will try for a short time constantly,
 864          * if such a condition occurs. If it doesn't change, it will
 865          * increase the busy_siga_counter and save the timestamp, and
 866          * schedule the queue for later processing (via mark_q, using the
 867          * queue tasklet). __qdio_outbound_processing will check out the
 868          * counter. If non-zero, it will call qdio_kick_outbound_q as often
 869          * as the value of the counter. This will attempt further SIGA
 870          * instructions. For each successful SIGA, the counter is
 871          * decreased, for failing SIGAs the counter remains the same, after
 872          * all.
 873          * After some time of no movement, qdio_kick_outbound_q will
 874          * finally fail and reflect corresponding error codes to call
 875          * the upper layer module and have it take the queues down.
 876          *
 877          * Note that this is a change from the original HiperSockets design
 878          * (saying cc=2 and busy bit means take the queues down), but in
 879          * these days Guest LAN didn't exist... excessive cc=2 with busy bit
 880          * conditions will still take the queues down, but the threshold is
 881          * higher due to the Guest LAN environment.
 882          */
 883
 884
 885         result=qdio_siga_output(q);
 886
 887         switch (result) {
 888         case 0:
 889                 /* went smooth this time, reset timestamp */
 890 #ifdef CONFIG_QDIO_DEBUG
 891                 QDIO_DBF_TEXT3(0,trace,"cc2reslv");
 892                 sprintf(dbf_text,"%4x%2x%2x",q->schid.sch_no,q->q_no,
 893                         atomic_read(&q->busy_siga_counter));
 894                 QDIO_DBF_TEXT3(0,trace,dbf_text);
 895 #endif /* CONFIG_QDIO_DEBUG */
 896                 q->timing.busy_start=0;
 897                 break;
 898         case (2|QDIO_SIGA_ERROR_B_BIT_SET):
 899                 /* cc=2 and busy bit: */
 900                 atomic_inc(&q->busy_siga_counter);
 901
 902                 /* if the last siga was successful, save
 903                  * timestamp here */
 904                 if (!q->timing.busy_start)
 905                         q->timing.busy_start=NOW;
 906
 907                 /* if we're in time, don't touch error_status_flags
 908                  * and siga_error */
 909                 if (NOW-q->timing.busy_start<QDIO_BUSY_BIT_GIVE_UP) {
 910                         qdio_mark_q(q);
 911                         break;
 912                 }
 913                 QDIO_DBF_TEXT2(0,trace,"cc2REPRT");
 914 #ifdef CONFIG_QDIO_DEBUG
 915                 sprintf(dbf_text,"%4x%2x%2x",q->schid.sch_no,q->q_no,
 916                         atomic_read(&q->busy_siga_counter));
 917                 QDIO_DBF_TEXT3(0,trace,dbf_text);
 918 #endif /* CONFIG_QDIO_DEBUG */
 919                 /* else fallthrough and report error */
 920         default:
 921                 /* for plain cc=1, 2 or 3: */
 922                 if (q->siga_error)
 923                         q->error_status_flags|=
 924                                 QDIO_STATUS_MORE_THAN_ONE_SIGA_ERROR;
 925                 q->error_status_flags|=
 926                         QDIO_STATUS_LOOK_FOR_ERROR;
 927                 q->siga_error=result;
 928         }
 929 }
 930
 931 static void
 932 qdio_kick_outbound_handler(struct qdio_q *q)
 933 {
 934         int start, end, real_end, count;
 935 #ifdef CONFIG_QDIO_DEBUG
 936         char dbf_text[15];
 937 #endif
 938
 939         start = q->first_element_to_kick;
 940         /* last_move_ftc was just updated */
 941         real_end = GET_SAVED_FRONTIER(q);
 942         end = (real_end+QDIO_MAX_BUFFERS_PER_Q-1)&
 943                 (QDIO_MAX_BUFFERS_PER_Q-1);
 944         count = (end+QDIO_MAX_BUFFERS_PER_Q+1-start)&
 945                 (QDIO_MAX_BUFFERS_PER_Q-1);
 946
 947 #ifdef CONFIG_QDIO_DEBUG
 948         QDIO_DBF_TEXT4(0,trace,"kickouth");
 949         QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
 950
 951         sprintf(dbf_text,"s=%2xc=%2x",start,count);
 952         QDIO_DBF_TEXT4(0,trace,dbf_text);
 953 #endif /* CONFIG_QDIO_DEBUG */
 954
 955         if (q->state==QDIO_IRQ_STATE_ACTIVE)
 956                 q->handler(q->cdev,QDIO_STATUS_OUTBOUND_INT|
 957                            q->error_status_flags,
 958                            q->qdio_error,q->siga_error,q->q_no,start,count,
 959                            q->int_parm);
 960
 961         /* for the next time: */
 962         q->first_element_to_kick=real_end;
 963         q->qdio_error=0;
 964         q->siga_error=0;
 965         q->error_status_flags=0;
 966 }
 967
 968 static void
 969 __qdio_outbound_processing(struct qdio_q *q)
 970 {
 971         int siga_attempts;
 972
 973         QDIO_DBF_TEXT4(0,trace,"qoutproc");
 974         QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
 975
 976         if (unlikely(qdio_reserve_q(q))) {
 977                 qdio_release_q(q);
 978                 qdio_perf_stat_inc(&perf_stats.outbound_tl_runs_resched);
 979                 /* as we're sissies, we'll check next time */
 980                 if (likely(!atomic_read(&q->is_in_shutdown))) {
 981                         qdio_mark_q(q);
 982                         QDIO_DBF_TEXT4(0,trace,"busy,agn");
 983                 }
 984                 return;
 985         }
 986         qdio_perf_stat_inc(&perf_stats.outbound_tl_runs);
 987         qdio_perf_stat_inc(&perf_stats.tl_runs);
 988
 989         /* see comment in qdio_kick_outbound_q */
 990         siga_attempts=atomic_read(&q->busy_siga_counter);
 991         while (siga_attempts) {
 992                 atomic_dec(&q->busy_siga_counter);
 993                 qdio_kick_outbound_q(q);
 994                 siga_attempts--;
 995         }
 996
 997         if (qdio_has_outbound_q_moved(q))
 998                 qdio_kick_outbound_handler(q);
 999
1000         if (q->queue_type == QDIO_ZFCP_QFMT) {
1001                 if ((!q->hydra_gives_outbound_pcis) &&
1002                     (!qdio_is_outbound_q_done(q)))
1003                         qdio_mark_q(q);
1004         }
1005         else if (((!q->is_iqdio_q) && (!q->is_pci_out)) ||
1006                  (q->queue_type == QDIO_IQDIO_QFMT_ASYNCH)) {
1007                 /*
1008                  * make sure buffer switch from PRIMED to EMPTY is noticed
1009                  * and outbound_handler is called
1010                  */
1011                 if (qdio_is_outbound_q_done(q)) {
1012                         del_timer(&q->timer);
1013                 } else {
1014                         if (!timer_pending(&q->timer))
1015                                 mod_timer(&q->timer, jiffies +
1016                                           QDIO_FORCE_CHECK_TIMEOUT);
1017                 }
1018         }
1019
1020         qdio_release_q(q);
1021 }
1022
1023 static void
1024 qdio_outbound_processing(struct qdio_q *q)
1025 {
1026         __qdio_outbound_processing(q);
1027 }
1028
1029 /************************* INBOUND ROUTINES *******************************/
1030
1031
1032 static int
1033 qdio_get_inbound_buffer_frontier(struct qdio_q *q)
1034 {
1035         struct qdio_irq *irq;
1036         int f,f_mod_no;
1037         volatile char *slsb;
1038         unsigned int count = 1;
1039         int first_not_to_check;
1040 #ifdef CONFIG_QDIO_DEBUG
1041         char dbf_text[15];
1042 #endif /* CONFIG_QDIO_DEBUG */
1043 #ifdef QDIO_USE_PROCESSING_STATE
1044         int last_position=-1;
1045 #endif /* QDIO_USE_PROCESSING_STATE */
1046
1047         QDIO_DBF_TEXT4(0,trace,"getibfro");
1048         QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
1049
1050         irq = (struct qdio_irq *) q->irq_ptr;
1051         if (irq->is_qebsm)
1052                 return qdio_qebsm_get_inbound_buffer_frontier(q);
1053
1054         slsb=&q->slsb.acc.val[0];
1055         f_mod_no=f=q->first_to_check;
1056         /*
1057          * we don't check 128 buffers, as otherwise qdio_has_inbound_q_moved
1058          * would return 0
1059          */
1060         first_not_to_check=f+qdio_min(atomic_read(&q->number_of_buffers_used),
1061                                       (QDIO_MAX_BUFFERS_PER_Q-1));
1062
1063         /*
1064          * we don't use this one, as a PCI or we after a thin interrupt
1065          * will sync the queues
1066          */
1067         /* SYNC_MEMORY;*/
1068
1069 check_next:
1070         f_mod_no=f&(QDIO_MAX_BUFFERS_PER_Q-1);
1071         if (f==first_not_to_check)
1072                 goto out;
1073         switch (slsb[f_mod_no]) {
1074
1075         /* CU_EMPTY means frontier is reached */
1076         case SLSB_CU_INPUT_EMPTY:
1077                 QDIO_DBF_TEXT5(0,trace,"inptempt");
1078                 break;
1079
1080         /* P_PRIMED means set slsb to P_PROCESSING and move on */
1081         case SLSB_P_INPUT_PRIMED:
1082                 QDIO_DBF_TEXT5(0,trace,"inptprim");
1083
1084 #ifdef QDIO_USE_PROCESSING_STATE
1085                 /*
1086                  * as soon as running under VM, polling the input queues will
1087                  * kill VM in terms of CP overhead
1088                  */
1089                 if (q->siga_sync) {
1090                         set_slsb(q, &f_mod_no, SLSB_P_INPUT_NOT_INIT, &count);
1091                 } else {
1092                         /* set the previous buffer to NOT_INIT. The current
1093                          * buffer will be set to PROCESSING at the end of
1094                          * this function to avoid further interrupts. */
1095                         if (last_position>=0)
1096                                 set_slsb(q, &last_position,
1097                                          SLSB_P_INPUT_NOT_INIT, &count);
1098                         atomic_set(&q->polling,1);
1099                         last_position=f_mod_no;
1100                 }
1101 #else /* QDIO_USE_PROCESSING_STATE */
1102                 set_slsb(q, &f_mod_no, SLSB_P_INPUT_NOT_INIT, &count);
1103 #endif /* QDIO_USE_PROCESSING_STATE */
1104                 /*
1105                  * not needed, as the inbound queue will be synced on the next
1106                  * siga-r, resp. tiqdio_is_inbound_q_done will do the siga-s
1107                  */
1108                 /*SYNC_MEMORY;*/
1109                 f++;
1110                 atomic_dec(&q->number_of_buffers_used);
1111                 goto check_next;
1112
1113         case SLSB_P_INPUT_NOT_INIT:
1114         case SLSB_P_INPUT_PROCESSING:
1115                 QDIO_DBF_TEXT5(0,trace,"inpnipro");
1116                 break;
1117
1118         /* P_ERROR means frontier is reached, break and report error */
1119         case SLSB_P_INPUT_ERROR:
1120 #ifdef CONFIG_QDIO_DEBUG
1121                 sprintf(dbf_text,"inperr%2x",f_mod_no);
1122                 QDIO_DBF_TEXT3(1,trace,dbf_text);
1123 #endif /* CONFIG_QDIO_DEBUG */
1124                 QDIO_DBF_HEX2(1,sbal,q->sbal[f_mod_no],256);
1125
1126                 /* kind of process the buffer */
1127                 set_slsb(q, &f_mod_no, SLSB_P_INPUT_NOT_INIT, &count);
1128
1129                 if (q->qdio_error)
1130                         q->error_status_flags|=
1131                                 QDIO_STATUS_MORE_THAN_ONE_QDIO_ERROR;
1132                 q->qdio_error=SLSB_P_INPUT_ERROR;
1133                 q->error_status_flags|=QDIO_STATUS_LOOK_FOR_ERROR;
1134
1135                 /* we increment the frontier, as this buffer
1136                  * was processed obviously */
1137                 f_mod_no=(f_mod_no+1)&(QDIO_MAX_BUFFERS_PER_Q-1);
1138                 atomic_dec(&q->number_of_buffers_used);
1139
1140 #ifdef QDIO_USE_PROCESSING_STATE
1141                 last_position=-1;
1142 #endif /* QDIO_USE_PROCESSING_STATE */
1143
1144                 break;
1145
1146         /* everything else means frontier not changed (HALTED or so) */
1147         default:
1148                 break;
1149         }
1150 out:
1151         q->first_to_check=f_mod_no;
1152
1153 #ifdef QDIO_USE_PROCESSING_STATE
1154         if (last_position>=0)
1155                 set_slsb(q, &last_position, SLSB_P_INPUT_PROCESSING, &count);
1156 #endif /* QDIO_USE_PROCESSING_STATE */
1157
1158         QDIO_DBF_HEX4(0,trace,&q->first_to_check,sizeof(int));
1159
1160         return q->first_to_check;
1161 }
1162
1163 static int
1164 qdio_has_inbound_q_moved(struct qdio_q *q)
1165 {
1166         int i;
1167
1168         i=qdio_get_inbound_buffer_frontier(q);
1169         if ( (i!=GET_SAVED_FRONTIER(q)) ||
1170              (q->error_status_flags&QDIO_STATUS_LOOK_FOR_ERROR) ) {
1171                 SAVE_FRONTIER(q,i);
1172                 if ((!q->siga_sync)&&(!q->hydra_gives_outbound_pcis))
1173                         SAVE_TIMESTAMP(q);
1174
1175                 QDIO_DBF_TEXT4(0,trace,"inhasmvd");
1176                 QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
1177                 return 1;
1178         } else {
1179                 QDIO_DBF_TEXT4(0,trace,"inhsntmv");
1180                 QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
1181                 return 0;
1182         }
1183 }
1184
1185 /* means, no more buffers to be filled */
1186 static int
1187 tiqdio_is_inbound_q_done(struct qdio_q *q)
1188 {
1189         int no_used;
1190         unsigned int start_buf, count;
1191         unsigned char state = 0;
1192         struct qdio_irq *irq = (struct qdio_irq *) q->irq_ptr;
1193
1194 #ifdef CONFIG_QDIO_DEBUG
1195         char dbf_text[15];
1196 #endif
1197
1198         no_used=atomic_read(&q->number_of_buffers_used);
1199
1200         /* propagate the change from 82 to 80 through VM */
1201         SYNC_MEMORY;
1202
1203 #ifdef CONFIG_QDIO_DEBUG
1204         if (no_used) {
1205                 sprintf(dbf_text,"iqisnt%02x",no_used);
1206                 QDIO_DBF_TEXT4(0,trace,dbf_text);
1207         } else {
1208                 QDIO_DBF_TEXT4(0,trace,"iniqisdo");
1209         }
1210         QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
1211 #endif /* CONFIG_QDIO_DEBUG */
1212
1213         if (!no_used)
1214                 return 1;
1215         if (!q->siga_sync && !irq->is_qebsm)
1216                 /* we'll check for more primed buffers in qeth_stop_polling */
1217                 return 0;
1218         if (irq->is_qebsm) {
1219                 count = 1;
1220                 start_buf = q->first_to_check;
1221                 qdio_do_eqbs(q, &state, &start_buf, &count);
1222         } else
1223                 state = q->slsb.acc.val[q->first_to_check];
1224         if (state != SLSB_P_INPUT_PRIMED)
1225                 /*
1226                  * nothing more to do, if next buffer is not PRIMED.
1227                  * note that we did a SYNC_MEMORY before, that there
1228                  * has been a sychnronization.
1229                  * we will return 0 below, as there is nothing to do
1230                  * (stop_polling not necessary, as we have not been
1231                  * using the PROCESSING state
1232                  */
1233                 return 0;
1234
1235         /*
1236          * ok, the next input buffer is primed. that means, that device state
1237          * change indicator and adapter local summary are set, so we will find
1238          * it next time.
1239          * we will return 0 below, as there is nothing to do, except scheduling
1240          * ourselves for the next time.
1241          */
1242         tiqdio_set_summary_bit((__u32*)q->dev_st_chg_ind);
1243         tiqdio_sched_tl();
1244         return 0;
1245 }
1246
1247 static int
1248 qdio_is_inbound_q_done(struct qdio_q *q)
1249 {
1250         int no_used;
1251         unsigned int start_buf, count;
1252         unsigned char state = 0;
1253         struct qdio_irq *irq = (struct qdio_irq *) q->irq_ptr;
1254
1255 #ifdef CONFIG_QDIO_DEBUG
1256         char dbf_text[15];
1257 #endif
1258
1259         no_used=atomic_read(&q->number_of_buffers_used);
1260
1261         /*
1262          * we need that one for synchronization with the adapter, as it
1263          * does a kind of PCI avoidance
1264          */
1265         SYNC_MEMORY;
1266
1267         if (!no_used) {
1268                 QDIO_DBF_TEXT4(0,trace,"inqisdnA");
1269                 QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
1270                 return 1;
1271         }
1272         if (irq->is_qebsm) {
1273                 count = 1;
1274                 start_buf = q->first_to_check;
1275                 qdio_do_eqbs(q, &state, &start_buf, &count);
1276         } else
1277                 state = q->slsb.acc.val[q->first_to_check];
1278         if (state == SLSB_P_INPUT_PRIMED) {
1279                 /* we got something to do */
1280                 QDIO_DBF_TEXT4(0,trace,"inqisntA");
1281                 QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
1282                 return 0;
1283         }
1284
1285         /* on VM, we don't poll, so the q is always done here */
1286         if (q->siga_sync)
1287                 return 1;
1288         if (q->hydra_gives_outbound_pcis)
1289                 return 1;
1290
1291         /*
1292          * at this point we know, that inbound first_to_check
1293          * has (probably) not moved (see qdio_inbound_processing)
1294          */
1295         if (NOW>GET_SAVED_TIMESTAMP(q)+q->timing.threshold) {
1296 #ifdef CONFIG_QDIO_DEBUG
1297                 QDIO_DBF_TEXT4(0,trace,"inqisdon");
1298                 QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
1299                 sprintf(dbf_text,"pf%02xcn%02x",q->first_to_check,no_used);
1300                 QDIO_DBF_TEXT4(0,trace,dbf_text);
1301 #endif /* CONFIG_QDIO_DEBUG */
1302                 return 1;
1303         } else {
1304 #ifdef CONFIG_QDIO_DEBUG
1305                 QDIO_DBF_TEXT4(0,trace,"inqisntd");
1306                 QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
1307                 sprintf(dbf_text,"pf%02xcn%02x",q->first_to_check,no_used);
1308                 QDIO_DBF_TEXT4(0,trace,dbf_text);
1309 #endif /* CONFIG_QDIO_DEBUG */
1310                 return 0;
1311         }
1312 }
1313
1314 static void
1315 qdio_kick_inbound_handler(struct qdio_q *q)
1316 {
1317         int count, start, end, real_end, i;
1318 #ifdef CONFIG_QDIO_DEBUG
1319         char dbf_text[15];
1320 #endif
1321
1322         QDIO_DBF_TEXT4(0,trace,"kickinh");
1323         QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
1324
1325         start=q->first_element_to_kick;
1326         real_end=q->first_to_check;
1327         end=(real_end+QDIO_MAX_BUFFERS_PER_Q-1)&(QDIO_MAX_BUFFERS_PER_Q-1);
1328
1329         i=start;
1330         count=0;
1331         while (1) {
1332                 count++;
1333                 if (i==end)
1334                         break;
1335                 i=(i+1)&(QDIO_MAX_BUFFERS_PER_Q-1);
1336         }
1337
1338 #ifdef CONFIG_QDIO_DEBUG
1339         sprintf(dbf_text,"s=%2xc=%2x",start,count);
1340         QDIO_DBF_TEXT4(0,trace,dbf_text);
1341 #endif /* CONFIG_QDIO_DEBUG */
1342
1343         if (likely(q->state==QDIO_IRQ_STATE_ACTIVE))
1344                 q->handler(q->cdev,
1345                            QDIO_STATUS_INBOUND_INT|q->error_status_flags,
1346                            q->qdio_error,q->siga_error,q->q_no,start,count,
1347                            q->int_parm);
1348
1349         /* for the next time: */
1350         q->first_element_to_kick=real_end;
1351         q->qdio_error=0;
1352         q->siga_error=0;
1353         q->error_status_flags=0;
1354
1355         qdio_perf_stat_inc(&perf_stats.inbound_cnt);
1356 }
1357
1358 static void
1359 __tiqdio_inbound_processing(struct qdio_q *q, int spare_ind_was_set)
1360 {
1361         struct qdio_irq *irq_ptr;
1362         struct qdio_q *oq;
1363         int i;
1364
1365         QDIO_DBF_TEXT4(0,trace,"iqinproc");
1366         QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
1367
1368         /*
1369          * we first want to reserve the q, so that we know, that we don't
1370          * interrupt ourselves and call qdio_unmark_q, as is_in_shutdown might
1371          * be set
1372          */
1373         if (unlikely(qdio_reserve_q(q))) {
1374                 qdio_release_q(q);
1375                 qdio_perf_stat_inc(&perf_stats.inbound_thin_tl_runs_resched);
1376                 /*
1377                  * as we might just be about to stop polling, we make
1378                  * sure that we check again at least once more
1379                  */
1380                 tiqdio_sched_tl();
1381                 return;
1382         }
1383         qdio_perf_stat_inc(&perf_stats.inbound_thin_tl_runs);
1384         if (unlikely(atomic_read(&q->is_in_shutdown))) {
1385                 qdio_unmark_q(q);
1386                 goto out;
1387         }
1388
1389         /*
1390          * we reset spare_ind_was_set, when the queue does not use the
1391          * spare indicator
1392          */
1393         if (spare_ind_was_set)
1394                 spare_ind_was_set = (q->dev_st_chg_ind == &spare_indicator);
1395
1396         if (!(*(q->dev_st_chg_ind)) && !spare_ind_was_set)
1397                 goto out;
1398         /*
1399          * q->dev_st_chg_ind is the indicator, be it shared or not.
1400          * only clear it, if indicator is non-shared
1401          */
1402         if (!spare_ind_was_set)
1403                 tiqdio_clear_summary_bit((__u32*)q->dev_st_chg_ind);
1404
1405         if (q->hydra_gives_outbound_pcis) {
1406                 if (!q->siga_sync_done_on_thinints) {
1407                         SYNC_MEMORY_ALL;
1408                 } else if ((!q->siga_sync_done_on_outb_tis)&&
1409                          (q->hydra_gives_outbound_pcis)) {
1410                         SYNC_MEMORY_ALL_OUTB;
1411                 }
1412         } else {
1413                 SYNC_MEMORY;
1414         }
1415         /*
1416          * maybe we have to do work on our outbound queues... at least
1417          * we have to check the outbound-int-capable thinint-capable
1418          * queues
1419          */
1420         if (q->hydra_gives_outbound_pcis) {
1421                 irq_ptr = (struct qdio_irq*)q->irq_ptr;
1422                 for (i=0;i<irq_ptr->no_output_qs;i++) {
1423                         oq = irq_ptr->output_qs[i];
1424                         if (!qdio_is_outbound_q_done(oq)) {
1425                                 qdio_perf_stat_dec(&perf_stats.tl_runs);
1426                                 __qdio_outbound_processing(oq);
1427                         }
1428                 }
1429         }
1430
1431         if (!qdio_has_inbound_q_moved(q))
1432                 goto out;
1433
1434         qdio_kick_inbound_handler(q);
1435         if (tiqdio_is_inbound_q_done(q))
1436                 if (!qdio_stop_polling(q)) {
1437                         /*
1438                          * we set the flags to get into the stuff next time,
1439                          * see also comment in qdio_stop_polling
1440                          */
1441                         tiqdio_set_summary_bit((__u32*)q->dev_st_chg_ind);
1442                         tiqdio_sched_tl();
1443                 }
1444 out:
1445         qdio_release_q(q);
1446 }
1447
1448 static void
1449 tiqdio_inbound_processing(struct qdio_q *q)
1450 {
1451         __tiqdio_inbound_processing(q, atomic_read(&spare_indicator_usecount));
1452 }
1453
1454 static void
1455 __qdio_inbound_processing(struct qdio_q *q)
1456 {
1457         int q_laps=0;
1458
1459         QDIO_DBF_TEXT4(0,trace,"qinproc");
1460         QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
1461
1462         if (unlikely(qdio_reserve_q(q))) {
1463                 qdio_release_q(q);
1464                 qdio_perf_stat_inc(&perf_stats.inbound_tl_runs_resched);
1465                 /* as we're sissies, we'll check next time */
1466                 if (likely(!atomic_read(&q->is_in_shutdown))) {
1467                         qdio_mark_q(q);
1468                         QDIO_DBF_TEXT4(0,trace,"busy,agn");
1469                 }
1470                 return;
1471         }
1472         qdio_perf_stat_inc(&perf_stats.inbound_tl_runs);
1473         qdio_perf_stat_inc(&perf_stats.tl_runs);
1474
1475 again:
1476         if (qdio_has_inbound_q_moved(q)) {
1477                 qdio_kick_inbound_handler(q);
1478                 if (!qdio_stop_polling(q)) {
1479                         q_laps++;
1480                         if (q_laps<QDIO_Q_LAPS)
1481                                 goto again;
1482                 }
1483                 qdio_mark_q(q);
1484         } else {
1485                 if (!qdio_is_inbound_q_done(q))
1486                         /* means poll time is not yet over */
1487                         qdio_mark_q(q);
1488         }
1489
1490         qdio_release_q(q);
1491 }
1492
1493 static void
1494 qdio_inbound_processing(struct qdio_q *q)
1495 {
1496         __qdio_inbound_processing(q);
1497 }
1498
1499 /************************* MAIN ROUTINES *******************************/
1500
1501 #ifdef QDIO_USE_PROCESSING_STATE
1502 static int
1503 tiqdio_reset_processing_state(struct qdio_q *q, int q_laps)
1504 {
1505         if (!q) {
1506                 tiqdio_sched_tl();
1507                 return 0;
1508         }
1509
1510         /*
1511          * under VM, we have not used the PROCESSING state, so no
1512          * need to stop polling
1513          */
1514         if (q->siga_sync)
1515                 return 2;
1516
1517         if (unlikely(qdio_reserve_q(q))) {
1518                 qdio_release_q(q);
1519                 qdio_perf_stat_inc(&perf_stats.inbound_thin_tl_runs_resched);
1520                 /*
1521                  * as we might just be about to stop polling, we make
1522                  * sure that we check again at least once more
1523                  */
1524
1525                 /*
1526                  * sanity -- we'd get here without setting the
1527                  * dev st chg ind
1528                  */
1529                 tiqdio_set_summary_bit((__u32*)q->dev_st_chg_ind);
1530                 tiqdio_sched_tl();
1531                 return 0;
1532         }
1533         if (qdio_stop_polling(q)) {
1534                 qdio_release_q(q);
1535                 return 2;
1536         }
1537         if (q_laps<QDIO_Q_LAPS-1) {
1538                 qdio_release_q(q);
1539                 return 3;
1540         }
1541         /*
1542          * we set the flags to get into the stuff
1543          * next time, see also comment in qdio_stop_polling
1544          */
1545         tiqdio_set_summary_bit((__u32*)q->dev_st_chg_ind);
1546         tiqdio_sched_tl();
1547         qdio_release_q(q);
1548         return 1;
1549
1550 }
1551 #endif /* QDIO_USE_PROCESSING_STATE */
1552
1553 static void
1554 tiqdio_inbound_checks(void)
1555 {
1556         struct qdio_q *q;
1557         int spare_ind_was_set=0;
1558 #ifdef QDIO_USE_PROCESSING_STATE
1559         int q_laps=0;
1560 #endif /* QDIO_USE_PROCESSING_STATE */
1561
1562         QDIO_DBF_TEXT4(0,trace,"iqdinbck");
1563         QDIO_DBF_TEXT5(0,trace,"iqlocsum");
1564
1565 #ifdef QDIO_USE_PROCESSING_STATE
1566 again:
1567 #endif /* QDIO_USE_PROCESSING_STATE */
1568
1569         /* when the spare indicator is used and set, save that and clear it */
1570         if ((atomic_read(&spare_indicator_usecount)) && spare_indicator) {
1571                 spare_ind_was_set = 1;
1572                 tiqdio_clear_summary_bit((__u32*)&spare_indicator);
1573         }
1574
1575         q=(struct qdio_q*)tiq_list;
1576         do {
1577                 if (!q)
1578                         break;
1579                 __tiqdio_inbound_processing(q, spare_ind_was_set);
1580                 q=(struct qdio_q*)q->list_next;
1581         } while (q!=(struct qdio_q*)tiq_list);
1582
1583 #ifdef QDIO_USE_PROCESSING_STATE
1584         q=(struct qdio_q*)tiq_list;
1585         do {
1586                 int ret;
1587
1588                 ret = tiqdio_reset_processing_state(q, q_laps);
1589                 switch (ret) {
1590                 case 0:
1591                         return;
1592                 case 1:
1593                         q_laps++;
1594                 case 2:
1595                         q = (struct qdio_q*)q->list_next;
1596                         break;
1597                 default:
1598                         q_laps++;
1599                         goto again;
1600                 }
1601         } while (q!=(struct qdio_q*)tiq_list);
1602 #endif /* QDIO_USE_PROCESSING_STATE */
1603 }
1604
1605 static void
1606 tiqdio_tl(unsigned long data)
1607 {
1608         QDIO_DBF_TEXT4(0,trace,"iqdio_tl");
1609
1610         qdio_perf_stat_inc(&perf_stats.tl_runs);
1611
1612         tiqdio_inbound_checks();
1613 }
1614
1615 /********************* GENERAL HELPER_ROUTINES ***********************/
1616
1617 static void
1618 qdio_release_irq_memory(struct qdio_irq *irq_ptr)
1619 {
1620         int i;
1621         struct qdio_q *q;
1622
1623         for (i = 0; i < QDIO_MAX_QUEUES_PER_IRQ; i++) {
1624                 q = irq_ptr->input_qs[i];
1625                 if (q) {
1626                         free_page((unsigned long) q->slib);
1627                         kmem_cache_free(qdio_q_cache, q);
1628                 }
1629                 q = irq_ptr->output_qs[i];
1630                 if (q) {
1631                         free_page((unsigned long) q->slib);
1632                         kmem_cache_free(qdio_q_cache, q);
1633                 }
1634         }
1635         free_page((unsigned long) irq_ptr->qdr);
1636         free_page((unsigned long) irq_ptr);
1637 }
1638
1639 static void
1640 qdio_set_impl_params(struct qdio_irq *irq_ptr,
1641                      unsigned int qib_param_field_format,
1642                      /* pointer to 128 bytes or NULL, if no param field */
1643                      unsigned char *qib_param_field,
1644                      /* pointer to no_queues*128 words of data or NULL */
1645                      unsigned int no_input_qs,
1646                      unsigned int no_output_qs,
1647                      unsigned long *input_slib_elements,
1648                      unsigned long *output_slib_elements)
1649 {
1650         int i,j;
1651
1652         if (!irq_ptr)
1653                 return;
1654
1655         irq_ptr->qib.pfmt=qib_param_field_format;
1656         if (qib_param_field)
1657                 memcpy(irq_ptr->qib.parm,qib_param_field,
1658                        QDIO_MAX_BUFFERS_PER_Q);
1659
1660         if (input_slib_elements)
1661                 for (i=0;i<no_input_qs;i++) {
1662                         for (j=0;j<QDIO_MAX_BUFFERS_PER_Q;j++)
1663                                 irq_ptr->input_qs[i]->slib->slibe[j].parms=
1664                                         input_slib_elements[
1665                                                 i*QDIO_MAX_BUFFERS_PER_Q+j];
1666                 }
1667         if (output_slib_elements)
1668                 for (i=0;i<no_output_qs;i++) {
1669                         for (j=0;j<QDIO_MAX_BUFFERS_PER_Q;j++)
1670                                 irq_ptr->output_qs[i]->slib->slibe[j].parms=
1671                                         output_slib_elements[
1672                                                 i*QDIO_MAX_BUFFERS_PER_Q+j];
1673                 }
1674 }
1675
1676 static int
1677 qdio_alloc_qs(struct qdio_irq *irq_ptr,
1678               int no_input_qs, int no_output_qs)
1679 {
1680         int i;
1681         struct qdio_q *q;
1682
1683         for (i = 0; i < no_input_qs; i++) {
1684                 q = kmem_cache_alloc(qdio_q_cache, GFP_KERNEL);
1685                 if (!q)
1686                         return -ENOMEM;
1687                 memset(q, 0, sizeof(*q));
1688
1689                 q->slib = (struct slib *) __get_free_page(GFP_KERNEL);
1690                 if (!q->slib) {
1691                         kmem_cache_free(qdio_q_cache, q);
1692                         return -ENOMEM;
1693                 }
1694                 irq_ptr->input_qs[i]=q;
1695         }
1696
1697         for (i = 0; i < no_output_qs; i++) {
1698                 q = kmem_cache_alloc(qdio_q_cache, GFP_KERNEL);
1699                 if (!q)
1700                         return -ENOMEM;
1701                 memset(q, 0, sizeof(*q));
1702
1703                 q->slib = (struct slib *) __get_free_page(GFP_KERNEL);
1704                 if (!q->slib) {
1705                         kmem_cache_free(qdio_q_cache, q);
1706                         return -ENOMEM;
1707                 }
1708                 irq_ptr->output_qs[i]=q;
1709         }
1710         return 0;
1711 }
1712
1713 static void
1714 qdio_fill_qs(struct qdio_irq *irq_ptr, struct ccw_device *cdev,
1715              int no_input_qs, int no_output_qs,
1716              qdio_handler_t *input_handler,
1717              qdio_handler_t *output_handler,
1718              unsigned long int_parm,int q_format,
1719              unsigned long flags,
1720              void **inbound_sbals_array,
1721              void **outbound_sbals_array)
1722 {
1723         struct qdio_q *q;
1724         int i,j;
1725         char dbf_text[20]; /* see qdio_initialize */
1726         void *ptr;
1727         int available;
1728
1729         sprintf(dbf_text,"qfqs%4x",cdev->private->schid.sch_no);
1730         QDIO_DBF_TEXT0(0,setup,dbf_text);
1731         for (i=0;i<no_input_qs;i++) {
1732                 q=irq_ptr->input_qs[i];
1733
1734                 memset(q,0,((char*)&q->slib)-((char*)q));
1735                 sprintf(dbf_text,"in-q%4x",i);
1736                 QDIO_DBF_TEXT0(0,setup,dbf_text);
1737                 QDIO_DBF_HEX0(0,setup,&q,sizeof(void*));
1738
1739                 memset(q->slib,0,PAGE_SIZE);
1740                 q->sl=(struct sl*)(((char*)q->slib)+PAGE_SIZE/2);
1741
1742                 available=0;
1743
1744                 for (j=0;j<QDIO_MAX_BUFFERS_PER_Q;j++)
1745                         q->sbal[j]=*(inbound_sbals_array++);
1746
1747                 q->queue_type=q_format;
1748                 q->int_parm=int_parm;
1749                 q->schid = irq_ptr->schid;
1750                 q->irq_ptr = irq_ptr;
1751                 q->cdev = cdev;
1752                 q->mask=1<<(31-i);
1753                 q->q_no=i;
1754                 q->is_input_q=1;
1755                 q->first_to_check=0;
1756                 q->last_move_ftc=0;
1757                 q->handler=input_handler;
1758                 q->dev_st_chg_ind=irq_ptr->dev_st_chg_ind;
1759
1760                 q->tasklet.data=(unsigned long)q;
1761                 /* q->is_thinint_q isn't valid at this time, but
1762                  * irq_ptr->is_thinint_irq is */
1763                 q->tasklet.func=(void(*)(unsigned long))
1764                         ((irq_ptr->is_thinint_irq)?&tiqdio_inbound_processing:
1765                          &qdio_inbound_processing);
1766
1767                 /* actually this is not used for inbound queues. yet. */
1768                 atomic_set(&q->busy_siga_counter,0);
1769                 q->timing.busy_start=0;
1770
1771 /*              for (j=0;j<QDIO_STATS_NUMBER;j++)
1772                         q->timing.last_transfer_times[j]=(qdio_get_micros()/
1773                                                           QDIO_STATS_NUMBER)*j;
1774                 q->timing.last_transfer_index=QDIO_STATS_NUMBER-1;
1775 */
1776
1777                 /* fill in slib */
1778                 if (i>0) irq_ptr->input_qs[i-1]->slib->nsliba=
1779                                  (unsigned long)(q->slib);
1780                 q->slib->sla=(unsigned long)(q->sl);
1781                 q->slib->slsba=(unsigned long)(&q->slsb.acc.val[0]);
1782
1783                 /* fill in sl */
1784                 for (j=0;j<QDIO_MAX_BUFFERS_PER_Q;j++)
1785                         q->sl->element[j].sbal=(unsigned long)(q->sbal[j]);
1786
1787                 QDIO_DBF_TEXT2(0,setup,"sl-sb-b0");
1788                 ptr=(void*)q->sl;
1789                 QDIO_DBF_HEX2(0,setup,&ptr,sizeof(void*));
1790                 ptr=(void*)&q->slsb;
1791                 QDIO_DBF_HEX2(0,setup,&ptr,sizeof(void*));
1792                 ptr=(void*)q->sbal[0];
1793                 QDIO_DBF_HEX2(0,setup,&ptr,sizeof(void*));
1794
1795                 /* fill in slsb */
1796                 if (!irq_ptr->is_qebsm) {
1797                         unsigned int count = 1;
1798                         for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; j++)
1799                                 set_slsb(q, &j, SLSB_P_INPUT_NOT_INIT, &count);
1800                 }
1801         }
1802
1803         for (i=0;i<no_output_qs;i++) {
1804                 q=irq_ptr->output_qs[i];
1805                 memset(q,0,((char*)&q->slib)-((char*)q));
1806
1807                 sprintf(dbf_text,"outq%4x",i);
1808                 QDIO_DBF_TEXT0(0,setup,dbf_text);
1809                 QDIO_DBF_HEX0(0,setup,&q,sizeof(void*));
1810
1811                 memset(q->slib,0,PAGE_SIZE);
1812                 q->sl=(struct sl*)(((char*)q->slib)+PAGE_SIZE/2);
1813
1814                 available=0;
1815
1816                 for (j=0;j<QDIO_MAX_BUFFERS_PER_Q;j++)
1817                         q->sbal[j]=*(outbound_sbals_array++);
1818
1819                 q->queue_type=q_format;
1820                 if ((q->queue_type == QDIO_IQDIO_QFMT) &&
1821                     (no_output_qs > 1) &&
1822                     (i == no_output_qs-1))
1823                         q->queue_type = QDIO_IQDIO_QFMT_ASYNCH;
1824                 q->int_parm=int_parm;
1825                 q->is_input_q=0;
1826                 q->is_pci_out = 0;
1827                 q->schid = irq_ptr->schid;
1828                 q->cdev = cdev;
1829                 q->irq_ptr = irq_ptr;
1830                 q->mask=1<<(31-i);
1831                 q->q_no=i;
1832                 q->first_to_check=0;
1833                 q->last_move_ftc=0;
1834                 q->handler=output_handler;
1835
1836                 q->tasklet.data=(unsigned long)q;
1837                 q->tasklet.func=(void(*)(unsigned long))
1838                         &qdio_outbound_processing;
1839                 q->timer.function=(void(*)(unsigned long))
1840                         &qdio_outbound_processing;
1841                 q->timer.data = (long)q;
1842                 init_timer(&q->timer);
1843
1844                 atomic_set(&q->busy_siga_counter,0);
1845                 q->timing.busy_start=0;
1846
1847                 /* fill in slib */
1848                 if (i>0) irq_ptr->output_qs[i-1]->slib->nsliba=
1849                                  (unsigned long)(q->slib);
1850                 q->slib->sla=(unsigned long)(q->sl);
1851                 q->slib->slsba=(unsigned long)(&q->slsb.acc.val[0]);
1852
1853                 /* fill in sl */
1854                 for (j=0;j<QDIO_MAX_BUFFERS_PER_Q;j++)
1855                         q->sl->element[j].sbal=(unsigned long)(q->sbal[j]);
1856
1857                 QDIO_DBF_TEXT2(0,setup,"sl-sb-b0");
1858                 ptr=(void*)q->sl;
1859                 QDIO_DBF_HEX2(0,setup,&ptr,sizeof(void*));
1860                 ptr=(void*)&q->slsb;
1861                 QDIO_DBF_HEX2(0,setup,&ptr,sizeof(void*));
1862                 ptr=(void*)q->sbal[0];
1863                 QDIO_DBF_HEX2(0,setup,&ptr,sizeof(void*));
1864
1865                 /* fill in slsb */
1866                 if (!irq_ptr->is_qebsm) {
1867                         unsigned int count = 1;
1868                         for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; j++)
1869                                 set_slsb(q, &j, SLSB_P_OUTPUT_NOT_INIT, &count);
1870                 }
1871         }
1872 }
1873
1874 static void
1875 qdio_fill_thresholds(struct qdio_irq *irq_ptr,
1876                      unsigned int no_input_qs,
1877                      unsigned int no_output_qs,
1878                      unsigned int min_input_threshold,
1879                      unsigned int max_input_threshold,
1880                      unsigned int min_output_threshold,
1881                      unsigned int max_output_threshold)
1882 {
1883         int i;
1884         struct qdio_q *q;
1885
1886         for (i=0;i<no_input_qs;i++) {
1887                 q=irq_ptr->input_qs[i];
1888                 q->timing.threshold=max_input_threshold;
1889 /*              for (j=0;j<QDIO_STATS_CLASSES;j++) {
1890                         q->threshold_classes[j].threshold=
1891                                 min_input_threshold+
1892                                 (max_input_threshold-min_input_threshold)/
1893                                 QDIO_STATS_CLASSES;
1894                 }
1895                 qdio_use_thresholds(q,QDIO_STATS_CLASSES/2);*/
1896         }
1897         for (i=0;i<no_output_qs;i++) {
1898                 q=irq_ptr->output_qs[i];
1899                 q->timing.threshold=max_output_threshold;
1900 /*              for (j=0;j<QDIO_STATS_CLASSES;j++) {
1901                         q->threshold_classes[j].threshold=
1902                                 min_output_threshold+
1903                                 (max_output_threshold-min_output_threshold)/
1904                                 QDIO_STATS_CLASSES;
1905                 }
1906                 qdio_use_thresholds(q,QDIO_STATS_CLASSES/2);*/
1907         }
1908 }
1909
1910 static int
1911 tiqdio_thinint_handler(void)
1912 {
1913         QDIO_DBF_TEXT4(0,trace,"thin_int");
1914
1915         qdio_perf_stat_inc(&perf_stats.thinints);
1916
1917         /* SVS only when needed:
1918          * issue SVS to benefit from iqdio interrupt avoidance
1919          * (SVS clears AISOI)*/
1920         if (!omit_svs)
1921                 tiqdio_clear_global_summary();
1922
1923         tiqdio_inbound_checks();
1924         return 0;
1925 }
1926
1927 static void
1928 qdio_set_state(struct qdio_irq *irq_ptr, enum qdio_irq_states state)
1929 {
1930         int i;
1931 #ifdef CONFIG_QDIO_DEBUG
1932         char dbf_text[15];
1933
1934         QDIO_DBF_TEXT5(0,trace,"newstate");
1935         sprintf(dbf_text,"%4x%4x",irq_ptr->schid.sch_no,state);
1936         QDIO_DBF_TEXT5(0,trace,dbf_text);
1937 #endif /* CONFIG_QDIO_DEBUG */
1938
1939         irq_ptr->state=state;
1940         for (i=0;i<irq_ptr->no_input_qs;i++)
1941                 irq_ptr->input_qs[i]->state=state;
1942         for (i=0;i<irq_ptr->no_output_qs;i++)
1943                 irq_ptr->output_qs[i]->state=state;
1944         mb();
1945 }
1946
1947 static void
1948 qdio_irq_check_sense(struct subchannel_id schid, struct irb *irb)
1949 {
1950         char dbf_text[15];
1951
1952         if (irb->esw.esw0.erw.cons) {
1953                 sprintf(dbf_text,"sens%4x",schid.sch_no);
1954                 QDIO_DBF_TEXT2(1,trace,dbf_text);
1955                 QDIO_DBF_HEX0(0,sense,irb,QDIO_DBF_SENSE_LEN);
1956
1957                 QDIO_PRINT_WARN("sense data available on qdio channel.\n");
1958                 QDIO_HEXDUMP16(WARN,"irb: ",irb);
1959                 QDIO_HEXDUMP16(WARN,"sense data: ",irb->ecw);
1960         }
1961
1962 }
1963
1964 static void
1965 qdio_handle_pci(struct qdio_irq *irq_ptr)
1966 {
1967         int i;
1968         struct qdio_q *q;
1969
1970         qdio_perf_stat_inc(&perf_stats.pcis);
1971         for (i=0;i<irq_ptr->no_input_qs;i++) {
1972                 q=irq_ptr->input_qs[i];
1973                 if (q->is_input_q&QDIO_FLAG_NO_INPUT_INTERRUPT_CONTEXT)
1974                         qdio_mark_q(q);
1975                 else {
1976                         qdio_perf_stat_dec(&perf_stats.tl_runs);
1977                         __qdio_inbound_processing(q);
1978                 }
1979         }
1980         if (!irq_ptr->hydra_gives_outbound_pcis)
1981                 return;
1982         for (i=0;i<irq_ptr->no_output_qs;i++) {
1983                 q=irq_ptr->output_qs[i];
1984                 if (qdio_is_outbound_q_done(q))
1985                         continue;
1986                 qdio_perf_stat_dec(&perf_stats.tl_runs);
1987                 if (!irq_ptr->sync_done_on_outb_pcis)
1988                         SYNC_MEMORY;
1989                 __qdio_outbound_processing(q);
1990         }
1991 }
1992
1993 static void qdio_establish_handle_irq(struct ccw_device*, int, int);
1994
1995 static void
1996 qdio_handle_activate_check(struct ccw_device *cdev, unsigned long intparm,
1997                            int cstat, int dstat)
1998 {
1999         struct qdio_irq *irq_ptr;
2000         struct qdio_q *q;
2001         char dbf_text[15];
2002
2003         irq_ptr = cdev->private->qdio_data;
2004
2005         QDIO_DBF_TEXT2(1, trace, "ick2");
2006         sprintf(dbf_text,"%s", cdev->dev.bus_id);
2007         QDIO_DBF_TEXT2(1,trace,dbf_text);
2008         QDIO_DBF_HEX2(0,trace,&intparm,sizeof(int));
2009         QDIO_DBF_HEX2(0,trace,&dstat,sizeof(int));
2010         QDIO_DBF_HEX2(0,trace,&cstat,sizeof(int));
2011         QDIO_PRINT_ERR("received check condition on activate " \
2012                        "queues on device %s (cs=x%x, ds=x%x).\n",
2013                        cdev->dev.bus_id, cstat, dstat);
2014         if (irq_ptr->no_input_qs) {
2015                 q=irq_ptr->input_qs[0];
2016         } else if (irq_ptr->no_output_qs) {
2017                 q=irq_ptr->output_qs[0];
2018         } else {
2019                 QDIO_PRINT_ERR("oops... no queue registered for device %s!?\n",
2020                                cdev->dev.bus_id);
2021                 goto omit_handler_call;
2022         }
2023         q->handler(q->cdev,QDIO_STATUS_ACTIVATE_CHECK_CONDITION|
2024                    QDIO_STATUS_LOOK_FOR_ERROR,
2025                    0,0,0,-1,-1,q->int_parm);
2026 omit_handler_call:
2027         qdio_set_state(irq_ptr,QDIO_IRQ_STATE_STOPPED);
2028
2029 }
2030
2031 static void
2032 qdio_call_shutdown(struct work_struct *work)
2033 {
2034         struct ccw_device_private *priv;
2035         struct ccw_device *cdev;
2036
2037         priv = container_of(work, struct ccw_device_private, kick_work);
2038         cdev = priv->cdev;
2039         qdio_shutdown(cdev, QDIO_FLAG_CLEANUP_USING_CLEAR);
2040         put_device(&cdev->dev);
2041 }
2042
2043 static void
2044 qdio_timeout_handler(struct ccw_device *cdev)
2045 {
2046         struct qdio_irq *irq_ptr;
2047         char dbf_text[15];
2048
2049         QDIO_DBF_TEXT2(0, trace, "qtoh");
2050         sprintf(dbf_text, "%s", cdev->dev.bus_id);
2051         QDIO_DBF_TEXT2(0, trace, dbf_text);
2052
2053         irq_ptr = cdev->private->qdio_data;
2054         sprintf(dbf_text, "state:%d", irq_ptr->state);
2055         QDIO_DBF_TEXT2(0, trace, dbf_text);
2056
2057         switch (irq_ptr->state) {
2058         case QDIO_IRQ_STATE_INACTIVE:
2059                 QDIO_PRINT_ERR("establish queues on irq 0.%x.%04x: timed out\n",
2060                                irq_ptr->schid.ssid, irq_ptr->schid.sch_no);
2061                 QDIO_DBF_TEXT2(1,setup,"eq:timeo");
2062                 qdio_set_state(irq_ptr, QDIO_IRQ_STATE_ERR);
2063                 break;
2064         case QDIO_IRQ_STATE_CLEANUP:
2065                 QDIO_PRINT_INFO("Did not get interrupt on cleanup, "
2066                                 "irq=0.%x.%x.\n",
2067                                 irq_ptr->schid.ssid, irq_ptr->schid.sch_no);
2068                 qdio_set_state(irq_ptr, QDIO_IRQ_STATE_ERR);
2069                 break;
2070         case QDIO_IRQ_STATE_ESTABLISHED:
2071         case QDIO_IRQ_STATE_ACTIVE:
2072                 /* I/O has been terminated by common I/O layer. */
2073                 QDIO_PRINT_INFO("Queues on irq 0.%x.%04x killed by cio.\n",
2074                                 irq_ptr->schid.ssid, irq_ptr->schid.sch_no);
2075                 QDIO_DBF_TEXT2(1, trace, "cio:term");
2076                 qdio_set_state(irq_ptr, QDIO_IRQ_STATE_STOPPED);
2077                 if (get_device(&cdev->dev)) {
2078                         /* Can't call shutdown from interrupt context. */
2079                         PREPARE_WORK(&cdev->private->kick_work,
2080                                      qdio_call_shutdown);
2081                         queue_work(ccw_device_work, &cdev->private->kick_work);
2082                 }
2083                 break;
2084         default:
2085                 BUG();
2086         }
2087         ccw_device_set_timeout(cdev, 0);
2088         wake_up(&cdev->private->wait_q);
2089 }
2090
2091 static void
2092 qdio_handler(struct ccw_device *cdev, unsigned long intparm, struct irb *irb)
2093 {
2094         struct qdio_irq *irq_ptr;
2095         int cstat,dstat;
2096         char dbf_text[15];
2097
2098 #ifdef CONFIG_QDIO_DEBUG
2099         QDIO_DBF_TEXT4(0, trace, "qint");
2100         sprintf(dbf_text, "%s", cdev->dev.bus_id);
2101         QDIO_DBF_TEXT4(0, trace, dbf_text);
2102 #endif /* CONFIG_QDIO_DEBUG */
2103
2104         if (!intparm) {
2105                 QDIO_PRINT_ERR("got unsolicited interrupt in qdio " \
2106                                   "handler, device %s\n", cdev->dev.bus_id);
2107                 return;
2108         }
2109
2110         irq_ptr = cdev->private->qdio_data;
2111         if (!irq_ptr) {
2112                 QDIO_DBF_TEXT2(1, trace, "uint");
2113                 sprintf(dbf_text,"%s", cdev->dev.bus_id);
2114                 QDIO_DBF_TEXT2(1,trace,dbf_text);
2115                 QDIO_PRINT_ERR("received interrupt on unused device %s!\n",
2116                                cdev->dev.bus_id);
2117                 return;
2118         }
2119
2120         if (IS_ERR(irb)) {
2121                 /* Currently running i/o is in error. */
2122                 switch (PTR_ERR(irb)) {
2123                 case -EIO:
2124                         QDIO_PRINT_ERR("i/o error on device %s\n",
2125                                        cdev->dev.bus_id);
2126                         return;
2127                 case -ETIMEDOUT:
2128                         qdio_timeout_handler(cdev);
2129                         return;
2130                 default:
2131                         QDIO_PRINT_ERR("unknown error state %ld on device %s\n",
2132                                        PTR_ERR(irb), cdev->dev.bus_id);
2133                         return;
2134                 }
2135         }
2136
2137         qdio_irq_check_sense(irq_ptr->schid, irb);
2138
2139 #ifdef CONFIG_QDIO_DEBUG
2140         sprintf(dbf_text, "state:%d", irq_ptr->state);
2141         QDIO_DBF_TEXT4(0, trace, dbf_text);
2142 #endif /* CONFIG_QDIO_DEBUG */
2143
2144         cstat = irb->scsw.cstat;
2145         dstat = irb->scsw.dstat;
2146
2147         switch (irq_ptr->state) {
2148         case QDIO_IRQ_STATE_INACTIVE:
2149                 qdio_establish_handle_irq(cdev, cstat, dstat);
2150                 break;
2151
2152         case QDIO_IRQ_STATE_CLEANUP:
2153                 qdio_set_state(irq_ptr, QDIO_IRQ_STATE_INACTIVE);
2154                 break;
2155
2156         case QDIO_IRQ_STATE_ESTABLISHED:
2157         case QDIO_IRQ_STATE_ACTIVE:
2158                 if (cstat & SCHN_STAT_PCI) {
2159                         qdio_handle_pci(irq_ptr);
2160                         break;
2161                 }
2162
2163                 if ((cstat&~SCHN_STAT_PCI)||dstat) {
2164                         qdio_handle_activate_check(cdev, intparm, cstat, dstat);
2165                         break;
2166                 }
2167         default:
2168                 QDIO_PRINT_ERR("got interrupt for queues in state %d on " \
2169                                "device %s?!\n",
2170                                irq_ptr->state, cdev->dev.bus_id);
2171         }
2172         wake_up(&cdev->private->wait_q);
2173
2174 }
2175
2176 int
2177 qdio_synchronize(struct ccw_device *cdev, unsigned int flags,
2178                  unsigned int queue_number)
2179 {
2180         int cc = 0;
2181         struct qdio_q *q;
2182         struct qdio_irq *irq_ptr;
2183         void *ptr;
2184 #ifdef CONFIG_QDIO_DEBUG
2185         char dbf_text[15]="SyncXXXX";
2186 #endif
2187
2188         irq_ptr = cdev->private->qdio_data;
2189         if (!irq_ptr)
2190                 return -ENODEV;
2191
2192 #ifdef CONFIG_QDIO_DEBUG
2193         *((int*)(&dbf_text[4])) = irq_ptr->schid.sch_no;
2194         QDIO_DBF_HEX4(0,trace,dbf_text,QDIO_DBF_TRACE_LEN);
2195         *((int*)(&dbf_text[0]))=flags;
2196         *((int*)(&dbf_text[4]))=queue_number;
2197         QDIO_DBF_HEX4(0,trace,dbf_text,QDIO_DBF_TRACE_LEN);
2198 #endif /* CONFIG_QDIO_DEBUG */
2199
2200         if (flags&QDIO_FLAG_SYNC_INPUT) {
2201                 q=irq_ptr->input_qs[queue_number];
2202                 if (!q)
2203                         return -EINVAL;
2204                 if (!(irq_ptr->is_qebsm))
2205                         cc = do_siga_sync(q->schid, 0, q->mask);
2206         } else if (flags&QDIO_FLAG_SYNC_OUTPUT) {
2207                 q=irq_ptr->output_qs[queue_number];
2208                 if (!q)
2209                         return -EINVAL;
2210                 if (!(irq_ptr->is_qebsm))
2211                         cc = do_siga_sync(q->schid, q->mask, 0);
2212         } else
2213                 return -EINVAL;
2214
2215         ptr=&cc;
2216         if (cc)
2217                 QDIO_DBF_HEX3(0,trace,&ptr,sizeof(int));
2218
2219         return cc;
2220 }
2221
2222 static void
2223 qdio_check_subchannel_qebsm(struct qdio_irq *irq_ptr, unsigned char qdioac,
2224                             unsigned long token)
2225 {
2226         struct qdio_q *q;
2227         int i;
2228         unsigned int count, start_buf;
2229         char dbf_text[15];
2230
2231         /*check if QEBSM is disabled */
2232         if (!(irq_ptr->is_qebsm) || !(qdioac & 0x01)) {
2233                 irq_ptr->is_qebsm  = 0;
2234                 irq_ptr->sch_token = 0;
2235                 irq_ptr->qib.rflags &= ~QIB_RFLAGS_ENABLE_QEBSM;
2236                 QDIO_DBF_TEXT0(0,setup,"noV=V");
2237                 return;
2238         }
2239         irq_ptr->sch_token = token;
2240         /*input queue*/
2241         for (i = 0; i < irq_ptr->no_input_qs;i++) {
2242                 q = irq_ptr->input_qs[i];
2243                 count = QDIO_MAX_BUFFERS_PER_Q;
2244                 start_buf = 0;
2245                 set_slsb(q, &start_buf, SLSB_P_INPUT_NOT_INIT, &count);
2246         }
2247         sprintf(dbf_text,"V=V:%2x",irq_ptr->is_qebsm);
2248         QDIO_DBF_TEXT0(0,setup,dbf_text);
2249         sprintf(dbf_text,"%8lx",irq_ptr->sch_token);
2250         QDIO_DBF_TEXT0(0,setup,dbf_text);
2251         /*output queue*/
2252         for (i = 0; i < irq_ptr->no_output_qs; i++) {
2253                 q = irq_ptr->output_qs[i];
2254                 count = QDIO_MAX_BUFFERS_PER_Q;
2255                 start_buf = 0;
2256                 set_slsb(q, &start_buf, SLSB_P_OUTPUT_NOT_INIT, &count);
2257         }
2258 }
2259
2260 static void
2261 qdio_get_ssqd_information(struct qdio_irq *irq_ptr)
2262 {
2263         int result;
2264         unsigned char qdioac;
2265         struct {
2266                 struct chsc_header request;
2267                 u16 reserved1:10;
2268                 u16 ssid:2;
2269                 u16 fmt:4;
2270                 u16 first_sch;
2271                 u16 reserved2;
2272                 u16 last_sch;
2273                 u32 reserved3;
2274                 struct chsc_header response;
2275                 u32 reserved4;
2276                 u8  flags;
2277                 u8  reserved5;
2278                 u16 sch;
2279                 u8  qfmt;
2280                 u8  parm;
2281                 u8  qdioac1;
2282                 u8  sch_class;
2283                 u8  reserved7;
2284                 u8  icnt;
2285                 u8  reserved8;
2286                 u8  ocnt;
2287                 u8 reserved9;
2288                 u8 mbccnt;
2289                 u16 qdioac2;
2290                 u64 sch_token;
2291         } *ssqd_area;
2292
2293         QDIO_DBF_TEXT0(0,setup,"getssqd");
2294         qdioac = 0;
2295         ssqd_area = mempool_alloc(qdio_mempool_scssc, GFP_ATOMIC);
2296         if (!ssqd_area) {
2297                 QDIO_PRINT_WARN("Could not get memory for chsc. Using all " \
2298                                 "SIGAs for sch x%x.\n", irq_ptr->schid.sch_no);
2299                 irq_ptr->qdioac = CHSC_FLAG_SIGA_INPUT_NECESSARY |
2300                                   CHSC_FLAG_SIGA_OUTPUT_NECESSARY |
2301                                   CHSC_FLAG_SIGA_SYNC_NECESSARY; /* all flags set */
2302                 irq_ptr->is_qebsm = 0;
2303                 irq_ptr->sch_token = 0;
2304                 irq_ptr->qib.rflags &= ~QIB_RFLAGS_ENABLE_QEBSM;
2305                 return;
2306         }
2307
2308         ssqd_area->request = (struct chsc_header) {
2309                 .length = 0x0010,
2310                 .code   = 0x0024,
2311         };
2312         ssqd_area->first_sch = irq_ptr->schid.sch_no;
2313         ssqd_area->last_sch = irq_ptr->schid.sch_no;
2314         ssqd_area->ssid = irq_ptr->schid.ssid;
2315         result = chsc(ssqd_area);
2316
2317         if (result) {
2318                 QDIO_PRINT_WARN("CHSC returned cc %i. Using all " \
2319                                 "SIGAs for sch 0.%x.%x.\n", result,
2320                                 irq_ptr->schid.ssid, irq_ptr->schid.sch_no);
2321                 qdioac = CHSC_FLAG_SIGA_INPUT_NECESSARY |
2322                         CHSC_FLAG_SIGA_OUTPUT_NECESSARY |
2323                         CHSC_FLAG_SIGA_SYNC_NECESSARY; /* all flags set */
2324                 irq_ptr->is_qebsm  = 0;
2325                 goto out;
2326         }
2327
2328         if (ssqd_area->response.code != QDIO_CHSC_RESPONSE_CODE_OK) {
2329                 QDIO_PRINT_WARN("response upon checking SIGA needs " \
2330                                 "is 0x%x. Using all SIGAs for sch 0.%x.%x.\n",
2331                                 ssqd_area->response.code,
2332                                 irq_ptr->schid.ssid, irq_ptr->schid.sch_no);
2333                 qdioac = CHSC_FLAG_SIGA_INPUT_NECESSARY |
2334                         CHSC_FLAG_SIGA_OUTPUT_NECESSARY |
2335                         CHSC_FLAG_SIGA_SYNC_NECESSARY; /* all flags set */
2336                 irq_ptr->is_qebsm  = 0;
2337                 goto out;
2338         }
2339         if (!(ssqd_area->flags & CHSC_FLAG_QDIO_CAPABILITY) ||
2340             !(ssqd_area->flags & CHSC_FLAG_VALIDITY) ||
2341             (ssqd_area->sch != irq_ptr->schid.sch_no)) {
2342                 QDIO_PRINT_WARN("huh? problems checking out sch 0.%x.%x... " \
2343                                 "using all SIGAs.\n",
2344                                 irq_ptr->schid.ssid, irq_ptr->schid.sch_no);
2345                 qdioac = CHSC_FLAG_SIGA_INPUT_NECESSARY |
2346                         CHSC_FLAG_SIGA_OUTPUT_NECESSARY |
2347                         CHSC_FLAG_SIGA_SYNC_NECESSARY; /* worst case */
2348                 irq_ptr->is_qebsm  = 0;
2349                 goto out;
2350         }
2351         qdioac = ssqd_area->qdioac1;
2352 out:
2353         qdio_check_subchannel_qebsm(irq_ptr, qdioac,
2354                                     ssqd_area->sch_token);
2355         mempool_free(ssqd_area, qdio_mempool_scssc);
2356         irq_ptr->qdioac = qdioac;
2357 }
2358
2359 static unsigned int
2360 tiqdio_check_chsc_availability(void)
2361 {
2362         char dbf_text[15];
2363
2364         if (!css_characteristics_avail)
2365                 return -EIO;
2366
2367         /* Check for bit 41. */
2368         if (!css_general_characteristics.aif) {
2369                 QDIO_PRINT_WARN("Adapter interruption facility not " \
2370                                 "installed.\n");
2371                 return -ENOENT;
2372         }
2373
2374         /* Check for bits 107 and 108. */
2375         if (!css_chsc_characteristics.scssc ||
2376             !css_chsc_characteristics.scsscf) {
2377                 QDIO_PRINT_WARN("Set Chan Subsys. Char. & Fast-CHSCs " \
2378                                 "not available.\n");
2379                 return -ENOENT;
2380         }
2381
2382         /* Check for OSA/FCP thin interrupts (bit 67). */
2383         hydra_thinints = css_general_characteristics.aif_osa;
2384         sprintf(dbf_text,"hydrati%1x", hydra_thinints);
2385         QDIO_DBF_TEXT0(0,setup,dbf_text);
2386
2387 #ifdef CONFIG_64BIT
2388         /* Check for QEBSM support in general (bit 58). */
2389         is_passthrough = css_general_characteristics.qebsm;
2390 #endif
2391         sprintf(dbf_text,"cssQBS:%1x", is_passthrough);
2392         QDIO_DBF_TEXT0(0,setup,dbf_text);
2393
2394         /* Check for aif time delay disablement fac (bit 56). If installed,
2395          * omit svs even under lpar (good point by rick again) */
2396         omit_svs = css_general_characteristics.aif_tdd;
2397         sprintf(dbf_text,"omitsvs%1x", omit_svs);
2398         QDIO_DBF_TEXT0(0,setup,dbf_text);
2399         return 0;
2400 }
2401
2402
2403 static unsigned int
2404 tiqdio_set_subchannel_ind(struct qdio_irq *irq_ptr, int reset_to_zero)
2405 {
2406         unsigned long real_addr_local_summary_bit;
2407         unsigned long real_addr_dev_st_chg_ind;
2408         void *ptr;
2409         char dbf_text[15];
2410
2411         unsigned int resp_code;
2412         int result;
2413
2414         struct {
2415                 struct chsc_header request;
2416                 u16 operation_code;
2417                 u16 reserved1;
2418                 u32 reserved2;
2419                 u32 reserved3;
2420                 u64 summary_indicator_addr;
2421                 u64 subchannel_indicator_addr;
2422                 u32 ks:4;
2423                 u32 kc:4;
2424                 u32 reserved4:21;
2425                 u32 isc:3;
2426                 u32 word_with_d_bit;
2427                 /* set to 0x10000000 to enable
2428                  * time delay disablement facility */
2429                 u32 reserved5;
2430                 struct subchannel_id schid;
2431                 u32 reserved6[1004];
2432                 struct chsc_header response;
2433                 u32 reserved7;
2434         } *scssc_area;
2435
2436         if (!irq_ptr->is_thinint_irq)
2437                 return -ENODEV;
2438
2439         if (reset_to_zero) {
2440                 real_addr_local_summary_bit=0;
2441                 real_addr_dev_st_chg_ind=0;
2442         } else {
2443                 real_addr_local_summary_bit=
2444                         virt_to_phys((volatile void *)indicators);
2445                 real_addr_dev_st_chg_ind=
2446                         virt_to_phys((volatile void *)irq_ptr->dev_st_chg_ind);
2447         }
2448
2449         scssc_area = mempool_alloc(qdio_mempool_scssc, GFP_ATOMIC);
2450         if (!scssc_area) {
2451                 QDIO_PRINT_WARN("No memory for setting indicators on " \
2452                                 "subchannel 0.%x.%x.\n",
2453                                 irq_ptr->schid.ssid, irq_ptr->schid.sch_no);
2454                 return -ENOMEM;
2455         }
2456         scssc_area->request = (struct chsc_header) {
2457                 .length = 0x0fe0,
2458                 .code   = 0x0021,
2459         };
2460         scssc_area->operation_code = 0;
2461
2462         scssc_area->summary_indicator_addr = real_addr_local_summary_bit;
2463         scssc_area->subchannel_indicator_addr = real_addr_dev_st_chg_ind;
2464         scssc_area->ks = QDIO_STORAGE_KEY;
2465         scssc_area->kc = QDIO_STORAGE_KEY;
2466         scssc_area->isc = TIQDIO_THININT_ISC;
2467         scssc_area->schid = irq_ptr->schid;
2468         /* enables the time delay disablement facility. Don't care
2469          * whether it is really there (i.e. we haven't checked for
2470          * it) */
2471         if (css_general_characteristics.aif_tdd)
2472                 scssc_area->word_with_d_bit = 0x10000000;
2473         else
2474                 QDIO_PRINT_WARN("Time delay disablement facility " \
2475                                 "not available\n");
2476
2477         result = chsc(scssc_area);
2478         if (result) {
2479                 QDIO_PRINT_WARN("could not set indicators on irq 0.%x.%x, " \
2480                                 "cc=%i.\n",
2481                                 irq_ptr->schid.ssid, irq_ptr->schid.sch_no,result);
2482                 result = -EIO;
2483                 goto out;
2484         }
2485
2486         resp_code = scssc_area->response.code;
2487         if (resp_code!=QDIO_CHSC_RESPONSE_CODE_OK) {
2488                 QDIO_PRINT_WARN("response upon setting indicators " \
2489                                 "is 0x%x.\n",resp_code);
2490                 sprintf(dbf_text,"sidR%4x",resp_code);
2491                 QDIO_DBF_TEXT1(0,trace,dbf_text);
2492                 QDIO_DBF_TEXT1(0,setup,dbf_text);
2493                 ptr=&scssc_area->response;
2494                 QDIO_DBF_HEX2(1,setup,&ptr,QDIO_DBF_SETUP_LEN);
2495                 result = -EIO;
2496                 goto out;
2497         }
2498
2499         QDIO_DBF_TEXT2(0,setup,"setscind");
2500         QDIO_DBF_HEX2(0,setup,&real_addr_local_summary_bit,
2501                       sizeof(unsigned long));
2502         QDIO_DBF_HEX2(0,setup,&real_addr_dev_st_chg_ind,sizeof(unsigned long));
2503         result = 0;
2504 out:
2505         mempool_free(scssc_area, qdio_mempool_scssc);
2506         return result;
2507
2508 }
2509
2510 static unsigned int
2511 tiqdio_set_delay_target(struct qdio_irq *irq_ptr, unsigned long delay_target)
2512 {
2513         unsigned int resp_code;
2514         int result;
2515         void *ptr;
2516         char dbf_text[15];
2517
2518         struct {
2519                 struct chsc_header request;
2520                 u16 operation_code;
2521                 u16 reserved1;
2522                 u32 reserved2;
2523                 u32 reserved3;
2524                 u32 reserved4[2];
2525                 u32 delay_target;
2526                 u32 reserved5[1009];
2527                 struct chsc_header response;
2528                 u32 reserved6;
2529         } *scsscf_area;
2530
2531         if (!irq_ptr->is_thinint_irq)
2532                 return -ENODEV;
2533
2534         scsscf_area = mempool_alloc(qdio_mempool_scssc, GFP_ATOMIC);
2535         if (!scsscf_area) {
2536                 QDIO_PRINT_WARN("No memory for setting delay target on " \
2537                                 "subchannel 0.%x.%x.\n",
2538                                 irq_ptr->schid.ssid, irq_ptr->schid.sch_no);
2539                 return -ENOMEM;
2540         }
2541         scsscf_area->request = (struct chsc_header) {
2542                 .length = 0x0fe0,
2543                 .code   = 0x1027,
2544         };
2545
2546         scsscf_area->delay_target = delay_target<<16;
2547
2548         result=chsc(scsscf_area);
2549         if (result) {
2550                 QDIO_PRINT_WARN("could not set delay target on irq 0.%x.%x, " \
2551                                 "cc=%i. Continuing.\n",
2552                                 irq_ptr->schid.ssid, irq_ptr->schid.sch_no,
2553                                 result);
2554                 result = -EIO;
2555                 goto out;
2556         }
2557
2558         resp_code = scsscf_area->response.code;
2559         if (resp_code!=QDIO_CHSC_RESPONSE_CODE_OK) {
2560                 QDIO_PRINT_WARN("response upon setting delay target " \
2561                                 "is 0x%x. Continuing.\n",resp_code);
2562                 sprintf(dbf_text,"sdtR%4x",resp_code);
2563                 QDIO_DBF_TEXT1(0,trace,dbf_text);
2564                 QDIO_DBF_TEXT1(0,setup,dbf_text);
2565                 ptr=&scsscf_area->response;
2566                 QDIO_DBF_HEX2(1,trace,&ptr,QDIO_DBF_TRACE_LEN);
2567         }
2568         QDIO_DBF_TEXT2(0,trace,"delytrgt");
2569         QDIO_DBF_HEX2(0,trace,&delay_target,sizeof(unsigned long));
2570         result = 0; /* not critical */
2571 out:
2572         mempool_free(scsscf_area, qdio_mempool_scssc);
2573         return result;
2574 }
2575
2576 int
2577 qdio_cleanup(struct ccw_device *cdev, int how)
2578 {
2579         struct qdio_irq *irq_ptr;
2580         char dbf_text[15];
2581         int rc;
2582
2583         irq_ptr = cdev->private->qdio_data;
2584         if (!irq_ptr)
2585                 return -ENODEV;
2586
2587         sprintf(dbf_text,"qcln%4x",irq_ptr->schid.sch_no);
2588         QDIO_DBF_TEXT1(0,trace,dbf_text);
2589         QDIO_DBF_TEXT0(0,setup,dbf_text);
2590
2591         rc = qdio_shutdown(cdev, how);
2592         if ((rc == 0) || (rc == -EINPROGRESS))
2593                 rc = qdio_free(cdev);
2594         return rc;
2595 }
2596
2597 int
2598 qdio_shutdown(struct ccw_device *cdev, int how)
2599 {
2600         struct qdio_irq *irq_ptr;
2601         int i;
2602         int result = 0;
2603         int rc;
2604         unsigned long flags;
2605         int timeout;
2606         char dbf_text[15];
2607
2608         irq_ptr = cdev->private->qdio_data;
2609         if (!irq_ptr)
2610                 return -ENODEV;
2611
2612         down(&irq_ptr->setting_up_sema);
2613
2614         sprintf(dbf_text,"qsqs%4x",irq_ptr->schid.sch_no);
2615         QDIO_DBF_TEXT1(0,trace,dbf_text);
2616         QDIO_DBF_TEXT0(0,setup,dbf_text);
2617
2618         /* mark all qs as uninteresting */
2619         for (i=0;i<irq_ptr->no_input_qs;i++)
2620                 atomic_set(&irq_ptr->input_qs[i]->is_in_shutdown,1);
2621
2622         for (i=0;i<irq_ptr->no_output_qs;i++)
2623                 atomic_set(&irq_ptr->output_qs[i]->is_in_shutdown,1);
2624
2625         tasklet_kill(&tiqdio_tasklet);
2626
2627         for (i=0;i<irq_ptr->no_input_qs;i++) {
2628                 qdio_unmark_q(irq_ptr->input_qs[i]);
2629                 tasklet_kill(&irq_ptr->input_qs[i]->tasklet);
2630                 wait_event_interruptible_timeout(cdev->private->wait_q,
2631                                                  !atomic_read(&irq_ptr->
2632                                                               input_qs[i]->
2633                                                               use_count),
2634                                                  QDIO_NO_USE_COUNT_TIMEOUT);
2635                 if (atomic_read(&irq_ptr->input_qs[i]->use_count))
2636                         result=-EINPROGRESS;
2637         }
2638
2639         for (i=0;i<irq_ptr->no_output_qs;i++) {
2640                 tasklet_kill(&irq_ptr->output_qs[i]->tasklet);
2641                 del_timer(&irq_ptr->output_qs[i]->timer);
2642                 wait_event_interruptible_timeout(cdev->private->wait_q,
2643                                                  !atomic_read(&irq_ptr->
2644                                                               output_qs[i]->
2645                                                               use_count),
2646                                                  QDIO_NO_USE_COUNT_TIMEOUT);
2647                 if (atomic_read(&irq_ptr->output_qs[i]->use_count))
2648                         result=-EINPROGRESS;
2649         }
2650
2651         /* cleanup subchannel */
2652         spin_lock_irqsave(get_ccwdev_lock(cdev),flags);
2653         if (how&QDIO_FLAG_CLEANUP_USING_CLEAR) {
2654                 rc = ccw_device_clear(cdev, QDIO_DOING_CLEANUP);
2655                 timeout=QDIO_CLEANUP_CLEAR_TIMEOUT;
2656         } else if (how&QDIO_FLAG_CLEANUP_USING_HALT) {
2657                 rc = ccw_device_halt(cdev, QDIO_DOING_CLEANUP);
2658                 timeout=QDIO_CLEANUP_HALT_TIMEOUT;
2659         } else { /* default behaviour */
2660                 rc = ccw_device_halt(cdev, QDIO_DOING_CLEANUP);
2661                 timeout=QDIO_CLEANUP_HALT_TIMEOUT;
2662         }
2663         if (rc == -ENODEV) {
2664                 /* No need to wait for device no longer present. */
2665                 qdio_set_state(irq_ptr, QDIO_IRQ_STATE_INACTIVE);
2666                 spin_unlock_irqrestore(get_ccwdev_lock(cdev), flags);
2667         } else if (((void *)cdev->handler != (void *)qdio_handler) && rc == 0) {
2668                 /*
2669                  * Whoever put another handler there, has to cope with the
2670                  * interrupt theirself. Might happen if qdio_shutdown was
2671                  * called on already shutdown queues, but this shouldn't have
2672                  * bad side effects.
2673                  */
2674                 qdio_set_state(irq_ptr, QDIO_IRQ_STATE_INACTIVE);
2675                 spin_unlock_irqrestore(get_ccwdev_lock(cdev), flags);
2676         } else if (rc == 0) {
2677                 qdio_set_state(irq_ptr, QDIO_IRQ_STATE_CLEANUP);
2678                 ccw_device_set_timeout(cdev, timeout);
2679                 spin_unlock_irqrestore(get_ccwdev_lock(cdev),flags);
2680
2681                 wait_event(cdev->private->wait_q,
2682                            irq_ptr->state == QDIO_IRQ_STATE_INACTIVE ||
2683                            irq_ptr->state == QDIO_IRQ_STATE_ERR);
2684         } else {
2685                 QDIO_PRINT_INFO("ccw_device_{halt,clear} returned %d for "
2686                                 "device %s\n", result, cdev->dev.bus_id);
2687                 spin_unlock_irqrestore(get_ccwdev_lock(cdev), flags);
2688                 result = rc;
2689                 goto out;
2690         }
2691         if (irq_ptr->is_thinint_irq) {
2692                 qdio_put_indicator((__u32*)irq_ptr->dev_st_chg_ind);
2693                 tiqdio_set_subchannel_ind(irq_ptr,1);
2694                 /* reset adapter interrupt indicators */
2695         }
2696
2697         /* exchange int handlers, if necessary */
2698         if ((void*)cdev->handler == (void*)qdio_handler)
2699                 cdev->handler=irq_ptr->original_int_handler;
2700
2701         /* Ignore errors. */
2702         qdio_set_state(irq_ptr, QDIO_IRQ_STATE_INACTIVE);
2703         ccw_device_set_timeout(cdev, 0);
2704 out:
2705         up(&irq_ptr->setting_up_sema);
2706         return result;
2707 }
2708
2709 int
2710 qdio_free(struct ccw_device *cdev)
2711 {
2712         struct qdio_irq *irq_ptr;
2713         char dbf_text[15];
2714
2715         irq_ptr = cdev->private->qdio_data;
2716         if (!irq_ptr)
2717                 return -ENODEV;
2718
2719         down(&irq_ptr->setting_up_sema);
2720
2721         sprintf(dbf_text,"qfqs%4x",irq_ptr->schid.sch_no);
2722         QDIO_DBF_TEXT1(0,trace,dbf_text);
2723         QDIO_DBF_TEXT0(0,setup,dbf_text);
2724
2725         cdev->private->qdio_data = NULL;
2726
2727         up(&irq_ptr->setting_up_sema);
2728
2729         qdio_release_irq_memory(irq_ptr);
2730         module_put(THIS_MODULE);
2731         return 0;
2732 }
2733
2734 static void
2735 qdio_allocate_do_dbf(struct qdio_initialize *init_data)
2736 {
2737         char dbf_text[20]; /* if a printf printed out more than 8 chars */
2738
2739         sprintf(dbf_text,"qfmt:%x",init_data->q_format);
2740         QDIO_DBF_TEXT0(0,setup,dbf_text);
2741         QDIO_DBF_HEX0(0,setup,init_data->adapter_name,8);
2742         sprintf(dbf_text,"qpff%4x",init_data->qib_param_field_format);
2743         QDIO_DBF_TEXT0(0,setup,dbf_text);
2744         QDIO_DBF_HEX0(0,setup,&init_data->qib_param_field,sizeof(char*));
2745         QDIO_DBF_HEX0(0,setup,&init_data->input_slib_elements,sizeof(long*));
2746         QDIO_DBF_HEX0(0,setup,&init_data->output_slib_elements,sizeof(long*));
2747         sprintf(dbf_text,"miit%4x",init_data->min_input_threshold);
2748         QDIO_DBF_TEXT0(0,setup,dbf_text);
2749         sprintf(dbf_text,"mait%4x",init_data->max_input_threshold);
2750         QDIO_DBF_TEXT0(0,setup,dbf_text);
2751         sprintf(dbf_text,"miot%4x",init_data->min_output_threshold);
2752         QDIO_DBF_TEXT0(0,setup,dbf_text);
2753         sprintf(dbf_text,"maot%4x",init_data->max_output_threshold);
2754         QDIO_DBF_TEXT0(0,setup,dbf_text);
2755         sprintf(dbf_text,"niq:%4x",init_data->no_input_qs);
2756         QDIO_DBF_TEXT0(0,setup,dbf_text);
2757         sprintf(dbf_text,"noq:%4x",init_data->no_output_qs);
2758         QDIO_DBF_TEXT0(0,setup,dbf_text);
2759         QDIO_DBF_HEX0(0,setup,&init_data->input_handler,sizeof(void*));
2760         QDIO_DBF_HEX0(0,setup,&init_data->output_handler,sizeof(void*));
2761         QDIO_DBF_HEX0(0,setup,&init_data->int_parm,sizeof(long));
2762         QDIO_DBF_HEX0(0,setup,&init_data->flags,sizeof(long));
2763         QDIO_DBF_HEX0(0,setup,&init_data->input_sbal_addr_array,sizeof(void*));
2764         QDIO_DBF_HEX0(0,setup,&init_data->output_sbal_addr_array,sizeof(void*));
2765 }
2766
2767 static void
2768 qdio_allocate_fill_input_desc(struct qdio_irq *irq_ptr, int i, int iqfmt)
2769 {
2770         irq_ptr->input_qs[i]->is_iqdio_q = iqfmt;
2771         irq_ptr->input_qs[i]->is_thinint_q = irq_ptr->is_thinint_irq;
2772
2773         irq_ptr->qdr->qdf0[i].sliba=(unsigned long)(irq_ptr->input_qs[i]->slib);
2774
2775         irq_ptr->qdr->qdf0[i].sla=(unsigned long)(irq_ptr->input_qs[i]->sl);
2776
2777         irq_ptr->qdr->qdf0[i].slsba=
2778                 (unsigned long)(&irq_ptr->input_qs[i]->slsb.acc.val[0]);
2779
2780         irq_ptr->qdr->qdf0[i].akey=QDIO_STORAGE_KEY;
2781         irq_ptr->qdr->qdf0[i].bkey=QDIO_STORAGE_KEY;
2782         irq_ptr->qdr->qdf0[i].ckey=QDIO_STORAGE_KEY;
2783         irq_ptr->qdr->qdf0[i].dkey=QDIO_STORAGE_KEY;
2784 }
2785
2786 static void
2787 qdio_allocate_fill_output_desc(struct qdio_irq *irq_ptr, int i,
2788                                int j, int iqfmt)
2789 {
2790         irq_ptr->output_qs[i]->is_iqdio_q = iqfmt;
2791         irq_ptr->output_qs[i]->is_thinint_q = irq_ptr->is_thinint_irq;
2792
2793         irq_ptr->qdr->qdf0[i+j].sliba=(unsigned long)(irq_ptr->output_qs[i]->slib);
2794
2795         irq_ptr->qdr->qdf0[i+j].sla=(unsigned long)(irq_ptr->output_qs[i]->sl);
2796
2797         irq_ptr->qdr->qdf0[i+j].slsba=
2798                 (unsigned long)(&irq_ptr->output_qs[i]->slsb.acc.val[0]);
2799
2800         irq_ptr->qdr->qdf0[i+j].akey=QDIO_STORAGE_KEY;
2801         irq_ptr->qdr->qdf0[i+j].bkey=QDIO_STORAGE_KEY;
2802         irq_ptr->qdr->qdf0[i+j].ckey=QDIO_STORAGE_KEY;
2803         irq_ptr->qdr->qdf0[i+j].dkey=QDIO_STORAGE_KEY;
2804 }
2805
2806
2807 static void
2808 qdio_initialize_set_siga_flags_input(struct qdio_irq *irq_ptr)
2809 {
2810         int i;
2811
2812         for (i=0;i<irq_ptr->no_input_qs;i++) {
2813                 irq_ptr->input_qs[i]->siga_sync=
2814                         irq_ptr->qdioac&CHSC_FLAG_SIGA_SYNC_NECESSARY;
2815                 irq_ptr->input_qs[i]->siga_in=
2816                         irq_ptr->qdioac&CHSC_FLAG_SIGA_INPUT_NECESSARY;
2817                 irq_ptr->input_qs[i]->siga_out=
2818                         irq_ptr->qdioac&CHSC_FLAG_SIGA_OUTPUT_NECESSARY;
2819                 irq_ptr->input_qs[i]->siga_sync_done_on_thinints=
2820                         irq_ptr->qdioac&CHSC_FLAG_SIGA_SYNC_DONE_ON_THININTS;
2821                 irq_ptr->input_qs[i]->hydra_gives_outbound_pcis=
2822                         irq_ptr->hydra_gives_outbound_pcis;
2823                 irq_ptr->input_qs[i]->siga_sync_done_on_outb_tis=
2824                         ((irq_ptr->qdioac&
2825                           (CHSC_FLAG_SIGA_SYNC_DONE_ON_OUTB_PCIS|
2826                            CHSC_FLAG_SIGA_SYNC_DONE_ON_THININTS))==
2827                          (CHSC_FLAG_SIGA_SYNC_DONE_ON_OUTB_PCIS|
2828                           CHSC_FLAG_SIGA_SYNC_DONE_ON_THININTS));
2829
2830         }
2831 }
2832
2833 static void
2834 qdio_initialize_set_siga_flags_output(struct qdio_irq *irq_ptr)
2835 {
2836         int i;
2837
2838         for (i=0;i<irq_ptr->no_output_qs;i++) {
2839                 irq_ptr->output_qs[i]->siga_sync=
2840                         irq_ptr->qdioac&CHSC_FLAG_SIGA_SYNC_NECESSARY;
2841                 irq_ptr->output_qs[i]->siga_in=
2842                         irq_ptr->qdioac&CHSC_FLAG_SIGA_INPUT_NECESSARY;
2843                 irq_ptr->output_qs[i]->siga_out=
2844                         irq_ptr->qdioac&CHSC_FLAG_SIGA_OUTPUT_NECESSARY;
2845                 irq_ptr->output_qs[i]->siga_sync_done_on_thinints=
2846                         irq_ptr->qdioac&CHSC_FLAG_SIGA_SYNC_DONE_ON_THININTS;
2847                 irq_ptr->output_qs[i]->hydra_gives_outbound_pcis=
2848                         irq_ptr->hydra_gives_outbound_pcis;
2849                 irq_ptr->output_qs[i]->siga_sync_done_on_outb_tis=
2850                         ((irq_ptr->qdioac&
2851                           (CHSC_FLAG_SIGA_SYNC_DONE_ON_OUTB_PCIS|
2852                            CHSC_FLAG_SIGA_SYNC_DONE_ON_THININTS))==
2853                          (CHSC_FLAG_SIGA_SYNC_DONE_ON_OUTB_PCIS|
2854                           CHSC_FLAG_SIGA_SYNC_DONE_ON_THININTS));
2855
2856         }
2857 }
2858
2859 static int
2860 qdio_establish_irq_check_for_errors(struct ccw_device *cdev, int cstat,
2861                                     int dstat)
2862 {
2863         char dbf_text[15];
2864         struct qdio_irq *irq_ptr;
2865
2866         irq_ptr = cdev->private->qdio_data;
2867
2868         if (cstat || (dstat & ~(DEV_STAT_CHN_END|DEV_STAT_DEV_END))) {
2869                 sprintf(dbf_text,"ick1%4x",irq_ptr->schid.sch_no);
2870                 QDIO_DBF_TEXT2(1,trace,dbf_text);
2871                 QDIO_DBF_HEX2(0,trace,&dstat,sizeof(int));
2872                 QDIO_DBF_HEX2(0,trace,&cstat,sizeof(int));
2873                 QDIO_PRINT_ERR("received check condition on establish " \
2874                                "queues on irq 0.%x.%x (cs=x%x, ds=x%x).\n",
2875                                irq_ptr->schid.ssid, irq_ptr->schid.sch_no,
2876                                cstat,dstat);
2877                 qdio_set_state(irq_ptr,QDIO_IRQ_STATE_ERR);
2878         }
2879
2880         if (!(dstat & DEV_STAT_DEV_END)) {
2881                 QDIO_DBF_TEXT2(1,setup,"eq:no de");
2882                 QDIO_DBF_HEX2(0,setup,&dstat, sizeof(dstat));
2883                 QDIO_DBF_HEX2(0,setup,&cstat, sizeof(cstat));
2884                 QDIO_PRINT_ERR("establish queues on irq 0.%x.%04x: didn't get "
2885                                "device end: dstat=%02x, cstat=%02x\n",
2886                                irq_ptr->schid.ssid, irq_ptr->schid.sch_no,
2887                                dstat, cstat);
2888                 qdio_set_state(irq_ptr, QDIO_IRQ_STATE_ERR);
2889                 return 1;
2890         }
2891
2892         if (dstat & ~(DEV_STAT_CHN_END|DEV_STAT_DEV_END)) {
2893                 QDIO_DBF_TEXT2(1,setup,"eq:badio");
2894                 QDIO_DBF_HEX2(0,setup,&dstat, sizeof(dstat));
2895                 QDIO_DBF_HEX2(0,setup,&cstat, sizeof(cstat));
2896                 QDIO_PRINT_ERR("establish queues on irq 0.%x.%04x: got "
2897                                "the following devstat: dstat=%02x, "
2898                                "cstat=%02x\n", irq_ptr->schid.ssid,
2899                                irq_ptr->schid.sch_no, dstat, cstat);
2900                 qdio_set_state(irq_ptr, QDIO_IRQ_STATE_ERR);
2901                 return 1;
2902         }
2903         return 0;
2904 }
2905
2906 static void
2907 qdio_establish_handle_irq(struct ccw_device *cdev, int cstat, int dstat)
2908 {
2909         struct qdio_irq *irq_ptr;
2910         char dbf_text[15];
2911
2912         irq_ptr = cdev->private->qdio_data;
2913
2914         sprintf(dbf_text,"qehi%4x",cdev->private->schid.sch_no);
2915         QDIO_DBF_TEXT0(0,setup,dbf_text);
2916         QDIO_DBF_TEXT0(0,trace,dbf_text);
2917
2918         if (qdio_establish_irq_check_for_errors(cdev, cstat, dstat)) {
2919                 ccw_device_set_timeout(cdev, 0);
2920                 return;
2921         }
2922
2923         qdio_set_state(irq_ptr,QDIO_IRQ_STATE_ESTABLISHED);
2924         ccw_device_set_timeout(cdev, 0);
2925 }
2926
2927 int
2928 qdio_initialize(struct qdio_initialize *init_data)
2929 {
2930         int rc;
2931         char dbf_text[15];
2932
2933         sprintf(dbf_text,"qini%4x",init_data->cdev->private->schid.sch_no);
2934         QDIO_DBF_TEXT0(0,setup,dbf_text);
2935         QDIO_DBF_TEXT0(0,trace,dbf_text);
2936
2937         rc = qdio_allocate(init_data);
2938         if (rc == 0) {
2939                 rc = qdio_establish(init_data);
2940                 if (rc != 0)
2941                         qdio_free(init_data->cdev);
2942         }
2943
2944         return rc;
2945 }
2946
2947
2948 int
2949 qdio_allocate(struct qdio_initialize *init_data)
2950 {
2951         struct qdio_irq *irq_ptr;
2952         char dbf_text[15];
2953
2954         sprintf(dbf_text,"qalc%4x",init_data->cdev->private->schid.sch_no);
2955         QDIO_DBF_TEXT0(0,setup,dbf_text);
2956         QDIO_DBF_TEXT0(0,trace,dbf_text);
2957         if ( (init_data->no_input_qs>QDIO_MAX_QUEUES_PER_IRQ) ||
2958              (init_data->no_output_qs>QDIO_MAX_QUEUES_PER_IRQ) ||
2959              ((init_data->no_input_qs) && (!init_data->input_handler)) ||
2960              ((init_data->no_output_qs) && (!init_data->output_handler)) )
2961                 return -EINVAL;
2962
2963         if (!init_data->input_sbal_addr_array)
2964                 return -EINVAL;
2965
2966         if (!init_data->output_sbal_addr_array)
2967                 return -EINVAL;
2968
2969         qdio_allocate_do_dbf(init_data);
2970
2971         /* create irq */
2972         irq_ptr = (void *) get_zeroed_page(GFP_KERNEL | GFP_DMA);
2973
2974         QDIO_DBF_TEXT0(0,setup,"irq_ptr:");
2975         QDIO_DBF_HEX0(0,setup,&irq_ptr,sizeof(void*));
2976
2977         if (!irq_ptr) {
2978                 QDIO_PRINT_ERR("allocation of irq_ptr failed!\n");
2979                 return -ENOMEM;
2980         }
2981
2982         init_MUTEX(&irq_ptr->setting_up_sema);
2983
2984         /* QDR must be in DMA area since CCW data address is only 32 bit */
2985         irq_ptr->qdr = (struct qdr *) __get_free_page(GFP_KERNEL | GFP_DMA);
2986         if (!(irq_ptr->qdr)) {
2987                 free_page((unsigned long) irq_ptr);
2988                 QDIO_PRINT_ERR("allocation of irq_ptr->qdr failed!\n");
2989                 return -ENOMEM;
2990         }
2991         QDIO_DBF_TEXT0(0,setup,"qdr:");
2992         QDIO_DBF_HEX0(0,setup,&irq_ptr->qdr,sizeof(void*));
2993
2994         if (qdio_alloc_qs(irq_ptr,
2995                           init_data->no_input_qs,
2996                           init_data->no_output_qs)) {
2997                 QDIO_PRINT_ERR("queue allocation failed!\n");
2998                 qdio_release_irq_memory(irq_ptr);
2999                 return -ENOMEM;
3000         }
3001
3002         init_data->cdev->private->qdio_data = irq_ptr;
3003
3004         qdio_set_state(irq_ptr,QDIO_IRQ_STATE_INACTIVE);
3005
3006         return 0;
3007 }
3008
3009 static int qdio_fill_irq(struct qdio_initialize *init_data)
3010 {
3011         int i;
3012         char dbf_text[15];
3013         struct ciw *ciw;
3014         int is_iqdio;
3015         struct qdio_irq *irq_ptr;
3016
3017         irq_ptr = init_data->cdev->private->qdio_data;
3018
3019         memset(irq_ptr,0,((char*)&irq_ptr->qdr)-((char*)irq_ptr));
3020
3021         /* wipes qib.ac, required by ar7063 */
3022         memset(irq_ptr->qdr,0,sizeof(struct qdr));
3023
3024         irq_ptr->int_parm=init_data->int_parm;
3025
3026         irq_ptr->schid = ccw_device_get_subchannel_id(init_data->cdev);
3027         irq_ptr->no_input_qs=init_data->no_input_qs;
3028         irq_ptr->no_output_qs=init_data->no_output_qs;
3029
3030         if (init_data->q_format==QDIO_IQDIO_QFMT) {
3031                 irq_ptr->is_iqdio_irq=1;
3032                 irq_ptr->is_thinint_irq=1;
3033         } else {
3034                 irq_ptr->is_iqdio_irq=0;
3035                 irq_ptr->is_thinint_irq=hydra_thinints;
3036         }
3037         sprintf(dbf_text,"is_i_t%1x%1x",
3038                 irq_ptr->is_iqdio_irq,irq_ptr->is_thinint_irq);
3039         QDIO_DBF_TEXT2(0,setup,dbf_text);
3040
3041         if (irq_ptr->is_thinint_irq) {
3042                 irq_ptr->dev_st_chg_ind = qdio_get_indicator();
3043                 QDIO_DBF_HEX1(0,setup,&irq_ptr->dev_st_chg_ind,sizeof(void*));
3044                 if (!irq_ptr->dev_st_chg_ind) {
3045                         QDIO_PRINT_WARN("no indicator location available " \
3046                                         "for irq 0.%x.%x\n",
3047                                         irq_ptr->schid.ssid, irq_ptr->schid.sch_no);
3048                         qdio_release_irq_memory(irq_ptr);
3049                         return -ENOBUFS;
3050                 }
3051         }
3052
3053         /* defaults */
3054         irq_ptr->equeue.cmd=DEFAULT_ESTABLISH_QS_CMD;
3055         irq_ptr->equeue.count=DEFAULT_ESTABLISH_QS_COUNT;
3056         irq_ptr->aqueue.cmd=DEFAULT_ACTIVATE_QS_CMD;
3057         irq_ptr->aqueue.count=DEFAULT_ACTIVATE_QS_COUNT;
3058
3059         qdio_fill_qs(irq_ptr, init_data->cdev,
3060                      init_data->no_input_qs,
3061                      init_data->no_output_qs,
3062                      init_data->input_handler,
3063                      init_data->output_handler,init_data->int_parm,
3064                      init_data->q_format,init_data->flags,
3065                      init_data->input_sbal_addr_array,
3066                      init_data->output_sbal_addr_array);
3067
3068         if (!try_module_get(THIS_MODULE)) {
3069                 QDIO_PRINT_CRIT("try_module_get() failed!\n");
3070                 qdio_release_irq_memory(irq_ptr);
3071                 return -EINVAL;
3072         }
3073
3074         qdio_fill_thresholds(irq_ptr,init_data->no_input_qs,
3075                              init_data->no_output_qs,
3076                              init_data->min_input_threshold,
3077                              init_data->max_input_threshold,
3078                              init_data->min_output_threshold,
3079                              init_data->max_output_threshold);
3080
3081         /* fill in qdr */
3082         irq_ptr->qdr->qfmt=init_data->q_format;
3083         irq_ptr->qdr->iqdcnt=init_data->no_input_qs;
3084         irq_ptr->qdr->oqdcnt=init_data->no_output_qs;
3085         irq_ptr->qdr->iqdsz=sizeof(struct qdesfmt0)/4; /* size in words */
3086         irq_ptr->qdr->oqdsz=sizeof(struct qdesfmt0)/4;
3087
3088         irq_ptr->qdr->qiba=(unsigned long)&irq_ptr->qib;
3089         irq_ptr->qdr->qkey=QDIO_STORAGE_KEY;
3090
3091         /* fill in qib */
3092         irq_ptr->is_qebsm = is_passthrough;
3093         if (irq_ptr->is_qebsm)
3094                 irq_ptr->qib.rflags |= QIB_RFLAGS_ENABLE_QEBSM;
3095
3096         irq_ptr->qib.qfmt=init_data->q_format;
3097         if (init_data->no_input_qs)
3098                 irq_ptr->qib.isliba=(unsigned long)(irq_ptr->input_qs[0]->slib);
3099         if (init_data->no_output_qs)
3100                 irq_ptr->qib.osliba=(unsigned long)(irq_ptr->output_qs[0]->slib);
3101         memcpy(irq_ptr->qib.ebcnam,init_data->adapter_name,8);
3102
3103         qdio_set_impl_params(irq_ptr,init_data->qib_param_field_format,
3104                              init_data->qib_param_field,
3105                              init_data->no_input_qs,
3106                              init_data->no_output_qs,
3107                              init_data->input_slib_elements,
3108                              init_data->output_slib_elements);
3109
3110         /* first input descriptors, then output descriptors */
3111         is_iqdio = (init_data->q_format == QDIO_IQDIO_QFMT) ? 1 : 0;
3112         for (i=0;i<init_data->no_input_qs;i++)
3113                 qdio_allocate_fill_input_desc(irq_ptr, i, is_iqdio);
3114
3115         for (i=0;i<init_data->no_output_qs;i++)
3116                 qdio_allocate_fill_output_desc(irq_ptr, i,
3117                                                init_data->no_input_qs,
3118                                                is_iqdio);
3119
3120         /* qdr, qib, sls, slsbs, slibs, sbales filled. */
3121
3122         /* get qdio commands */
3123         ciw = ccw_device_get_ciw(init_data->cdev, CIW_TYPE_EQUEUE);
3124         if (!ciw) {
3125                 QDIO_DBF_TEXT2(1,setup,"no eq");
3126                 QDIO_PRINT_INFO("No equeue CIW found for QDIO commands. "
3127                                 "Trying to use default.\n");
3128         } else
3129                 irq_ptr->equeue = *ciw;
3130         ciw = ccw_device_get_ciw(init_data->cdev, CIW_TYPE_AQUEUE);
3131         if (!ciw) {
3132                 QDIO_DBF_TEXT2(1,setup,"no aq");
3133                 QDIO_PRINT_INFO("No aqueue CIW found for QDIO commands. "
3134                                 "Trying to use default.\n");
3135         } else
3136                 irq_ptr->aqueue = *ciw;
3137
3138         /* Set new interrupt handler. */
3139         irq_ptr->original_int_handler = init_data->cdev->handler;
3140         init_data->cdev->handler = qdio_handler;
3141
3142         return 0;
3143 }
3144
3145 int
3146 qdio_establish(struct qdio_initialize *init_data)
3147 {
3148         struct qdio_irq *irq_ptr;
3149         unsigned long saveflags;
3150         int result, result2;
3151         struct ccw_device *cdev;
3152         char dbf_text[20];
3153
3154         cdev=init_data->cdev;
3155         irq_ptr = cdev->private->qdio_data;
3156         if (!irq_ptr)
3157                 return -EINVAL;
3158
3159         if (cdev->private->state != DEV_STATE_ONLINE)
3160                 return -EINVAL;
3161
3162         down(&irq_ptr->setting_up_sema);
3163
3164         qdio_fill_irq(init_data);
3165
3166         /* the thinint CHSC stuff */
3167         if (irq_ptr->is_thinint_irq) {
3168
3169                 result = tiqdio_set_subchannel_ind(irq_ptr,0);
3170                 if (result) {
3171                         up(&irq_ptr->setting_up_sema);
3172                         qdio_shutdown(cdev, QDIO_FLAG_CLEANUP_USING_CLEAR);
3173                         return result;
3174                 }
3175                 tiqdio_set_delay_target(irq_ptr,TIQDIO_DELAY_TARGET);
3176         }
3177
3178         sprintf(dbf_text,"qest%4x",cdev->private->schid.sch_no);
3179         QDIO_DBF_TEXT0(0,setup,dbf_text);
3180         QDIO_DBF_TEXT0(0,trace,dbf_text);
3181
3182         /* establish q */
3183         irq_ptr->ccw.cmd_code=irq_ptr->equeue.cmd;
3184         irq_ptr->ccw.flags=CCW_FLAG_SLI;
3185         irq_ptr->ccw.count=irq_ptr->equeue.count;
3186         irq_ptr->ccw.cda=QDIO_GET_ADDR(irq_ptr->qdr);
3187
3188         spin_lock_irqsave(get_ccwdev_lock(cdev),saveflags);
3189
3190         ccw_device_set_options_mask(cdev, 0);
3191         result=ccw_device_start_timeout(cdev,&irq_ptr->ccw,
3192                                         QDIO_DOING_ESTABLISH,0, 0,
3193                                         QDIO_ESTABLISH_TIMEOUT);
3194         if (result) {
3195                 result2=ccw_device_start_timeout(cdev,&irq_ptr->ccw,
3196                                                  QDIO_DOING_ESTABLISH,0,0,
3197                                                  QDIO_ESTABLISH_TIMEOUT);
3198                 sprintf(dbf_text,"eq:io%4x",result);
3199                 QDIO_DBF_TEXT2(1,setup,dbf_text);
3200                 if (result2) {
3201                         sprintf(dbf_text,"eq:io%4x",result);
3202                         QDIO_DBF_TEXT2(1,setup,dbf_text);
3203                 }
3204                 QDIO_PRINT_WARN("establish queues on irq 0.%x.%04x: do_IO " \
3205                                 "returned %i, next try returned %i\n",
3206                                 irq_ptr->schid.ssid, irq_ptr->schid.sch_no,
3207                                 result, result2);
3208                 result=result2;
3209                 if (result)
3210                         ccw_device_set_timeout(cdev, 0);
3211         }
3212
3213         spin_unlock_irqrestore(get_ccwdev_lock(cdev),saveflags);
3214
3215         if (result) {
3216                 up(&irq_ptr->setting_up_sema);
3217                 qdio_shutdown(cdev,QDIO_FLAG_CLEANUP_USING_CLEAR);
3218                 return result;
3219         }
3220
3221         /* Timeout is cared for already by using ccw_device_start_timeout(). */
3222         wait_event_interruptible(cdev->private->wait_q,
3223                  irq_ptr->state == QDIO_IRQ_STATE_ESTABLISHED ||
3224                  irq_ptr->state == QDIO_IRQ_STATE_ERR);
3225
3226         if (irq_ptr->state == QDIO_IRQ_STATE_ESTABLISHED)
3227                 result = 0;
3228         else {
3229                 up(&irq_ptr->setting_up_sema);
3230                 qdio_shutdown(cdev, QDIO_FLAG_CLEANUP_USING_CLEAR);
3231                 return -EIO;
3232         }
3233
3234         qdio_get_ssqd_information(irq_ptr);
3235         /* if this gets set once, we're running under VM and can omit SVSes */
3236         if (irq_ptr->qdioac&CHSC_FLAG_SIGA_SYNC_NECESSARY)
3237                 omit_svs=1;
3238
3239         sprintf(dbf_text,"qdioac%2x",irq_ptr->qdioac);
3240         QDIO_DBF_TEXT2(0,setup,dbf_text);
3241
3242         sprintf(dbf_text,"qib ac%2x",irq_ptr->qib.ac);
3243         QDIO_DBF_TEXT2(0,setup,dbf_text);
3244
3245         irq_ptr->hydra_gives_outbound_pcis=
3246                 irq_ptr->qib.ac&QIB_AC_OUTBOUND_PCI_SUPPORTED;
3247         irq_ptr->sync_done_on_outb_pcis=
3248                 irq_ptr->qdioac&CHSC_FLAG_SIGA_SYNC_DONE_ON_OUTB_PCIS;
3249
3250         qdio_initialize_set_siga_flags_input(irq_ptr);
3251         qdio_initialize_set_siga_flags_output(irq_ptr);
3252
3253         up(&irq_ptr->setting_up_sema);
3254
3255         return result;
3256
3257 }
3258
3259 int
3260 qdio_activate(struct ccw_device *cdev, int flags)
3261 {
3262         struct qdio_irq *irq_ptr;
3263         int i,result=0,result2;
3264         unsigned long saveflags;
3265         char dbf_text[20]; /* see qdio_initialize */
3266
3267         irq_ptr = cdev->private->qdio_data;
3268         if (!irq_ptr)
3269                 return -ENODEV;
3270
3271         if (cdev->private->state != DEV_STATE_ONLINE)
3272                 return -EINVAL;
3273
3274         down(&irq_ptr->setting_up_sema);
3275         if (irq_ptr->state==QDIO_IRQ_STATE_INACTIVE) {
3276                 result=-EBUSY;
3277                 goto out;
3278         }
3279
3280         sprintf(dbf_text,"qact%4x", irq_ptr->schid.sch_no);
3281         QDIO_DBF_TEXT2(0,setup,dbf_text);
3282         QDIO_DBF_TEXT2(0,trace,dbf_text);
3283
3284         /* activate q */
3285         irq_ptr->ccw.cmd_code=irq_ptr->aqueue.cmd;
3286         irq_ptr->ccw.flags=CCW_FLAG_SLI;
3287         irq_ptr->ccw.count=irq_ptr->aqueue.count;
3288         irq_ptr->ccw.cda=QDIO_GET_ADDR(0);
3289
3290         spin_lock_irqsave(get_ccwdev_lock(cdev),saveflags);
3291
3292         ccw_device_set_timeout(cdev, 0);
3293         ccw_device_set_options(cdev, CCWDEV_REPORT_ALL);
3294         result=ccw_device_start(cdev,&irq_ptr->ccw,QDIO_DOING_ACTIVATE,
3295                                 0, DOIO_DENY_PREFETCH);
3296         if (result) {
3297                 result2=ccw_device_start(cdev,&irq_ptr->ccw,
3298                                          QDIO_DOING_ACTIVATE,0,0);
3299                 sprintf(dbf_text,"aq:io%4x",result);
3300                 QDIO_DBF_TEXT2(1,setup,dbf_text);
3301                 if (result2) {
3302                         sprintf(dbf_text,"aq:io%4x",result);
3303                         QDIO_DBF_TEXT2(1,setup,dbf_text);
3304                 }
3305                 QDIO_PRINT_WARN("activate queues on irq 0.%x.%04x: do_IO " \
3306                                 "returned %i, next try returned %i\n",
3307                                 irq_ptr->schid.ssid, irq_ptr->schid.sch_no,
3308                                 result, result2);
3309                 result=result2;
3310         }
3311
3312         spin_unlock_irqrestore(get_ccwdev_lock(cdev),saveflags);
3313         if (result)
3314                 goto out;
3315
3316         for (i=0;i<irq_ptr->no_input_qs;i++) {
3317                 if (irq_ptr->is_thinint_irq) {
3318                         /*
3319                          * that way we know, that, if we will get interrupted
3320                          * by tiqdio_inbound_processing, qdio_unmark_q will
3321                          * not be called
3322                          */
3323                         qdio_reserve_q(irq_ptr->input_qs[i]);
3324                         qdio_mark_tiq(irq_ptr->input_qs[i]);
3325                         qdio_release_q(irq_ptr->input_qs[i]);
3326                 }
3327         }
3328
3329         if (flags&QDIO_FLAG_NO_INPUT_INTERRUPT_CONTEXT) {
3330                 for (i=0;i<irq_ptr->no_input_qs;i++) {
3331                         irq_ptr->input_qs[i]->is_input_q|=
3332                                 QDIO_FLAG_NO_INPUT_INTERRUPT_CONTEXT;
3333                 }
3334         }
3335
3336         wait_event_interruptible_timeout(cdev->private->wait_q,
3337                                          ((irq_ptr->state ==
3338                                           QDIO_IRQ_STATE_STOPPED) ||
3339                                           (irq_ptr->state ==
3340                                            QDIO_IRQ_STATE_ERR)),
3341                                          QDIO_ACTIVATE_TIMEOUT);
3342
3343         switch (irq_ptr->state) {
3344         case QDIO_IRQ_STATE_STOPPED:
3345         case QDIO_IRQ_STATE_ERR:
3346                 up(&irq_ptr->setting_up_sema);
3347                 qdio_shutdown(cdev, QDIO_FLAG_CLEANUP_USING_CLEAR);
3348                 down(&irq_ptr->setting_up_sema);
3349                 result = -EIO;
3350                 break;
3351         default:
3352                 qdio_set_state(irq_ptr, QDIO_IRQ_STATE_ACTIVE);
3353                 result = 0;
3354         }
3355  out:
3356         up(&irq_ptr->setting_up_sema);
3357
3358         return result;
3359 }
3360
3361 /* buffers filled forwards again to make Rick happy */
3362 static void
3363 qdio_do_qdio_fill_input(struct qdio_q *q, unsigned int qidx,
3364                         unsigned int count, struct qdio_buffer *buffers)
3365 {
3366         struct qdio_irq *irq = (struct qdio_irq *) q->irq_ptr;
3367         int tmp = 0;
3368
3369         qidx &= (QDIO_MAX_BUFFERS_PER_Q - 1);
3370         if (irq->is_qebsm) {
3371                 while (count) {
3372                         tmp = set_slsb(q, &qidx, SLSB_CU_INPUT_EMPTY, &count);
3373                         if (!tmp)
3374                                 return;
3375                 }
3376                 return;
3377         }
3378         for (;;) {
3379                 set_slsb(q, &qidx, SLSB_CU_INPUT_EMPTY, &count);
3380                 count--;
3381                 if (!count) break;
3382                 qidx = (qidx + 1) & (QDIO_MAX_BUFFERS_PER_Q - 1);
3383         }
3384 }
3385
3386 static void
3387 qdio_do_qdio_fill_output(struct qdio_q *q, unsigned int qidx,
3388                          unsigned int count, struct qdio_buffer *buffers)
3389 {
3390         struct qdio_irq *irq = (struct qdio_irq *) q->irq_ptr;
3391         int tmp = 0;
3392
3393         qidx &= (QDIO_MAX_BUFFERS_PER_Q - 1);
3394         if (irq->is_qebsm) {
3395                 while (count) {
3396                         tmp = set_slsb(q, &qidx, SLSB_CU_OUTPUT_PRIMED, &count);
3397                         if (!tmp)
3398                                 return;
3399                 }
3400                 return;
3401         }
3402
3403         for (;;) {
3404                 set_slsb(q, &qidx, SLSB_CU_OUTPUT_PRIMED, &count);
3405                 count--;
3406                 if (!count) break;
3407                 qidx = (qidx + 1) & (QDIO_MAX_BUFFERS_PER_Q - 1);
3408         }
3409 }
3410
3411 static void
3412 do_qdio_handle_inbound(struct qdio_q *q, unsigned int callflags,
3413                        unsigned int qidx, unsigned int count,
3414                        struct qdio_buffer *buffers)
3415 {
3416         int used_elements;
3417
3418         /* This is the inbound handling of queues */
3419         used_elements=atomic_add_return(count, &q->number_of_buffers_used) - count;
3420
3421         qdio_do_qdio_fill_input(q,qidx,count,buffers);
3422
3423         if ((used_elements+count==QDIO_MAX_BUFFERS_PER_Q)&&
3424             (callflags&QDIO_FLAG_UNDER_INTERRUPT))
3425                 atomic_xchg(&q->polling,0);
3426
3427         if (used_elements)
3428                 return;
3429         if (callflags&QDIO_FLAG_DONT_SIGA)
3430                 return;
3431         if (q->siga_in) {
3432                 int result;
3433
3434                 result=qdio_siga_input(q);
3435                 if (result) {
3436                         if (q->siga_error)
3437                                 q->error_status_flags|=
3438                                         QDIO_STATUS_MORE_THAN_ONE_SIGA_ERROR;
3439                         q->error_status_flags|=QDIO_STATUS_LOOK_FOR_ERROR;
3440                         q->siga_error=result;
3441                 }
3442         }
3443
3444         qdio_mark_q(q);
3445 }
3446
3447 static void
3448 do_qdio_handle_outbound(struct qdio_q *q, unsigned int callflags,
3449                         unsigned int qidx, unsigned int count,
3450                         struct qdio_buffer *buffers)
3451 {
3452         int used_elements;
3453         unsigned int cnt, start_buf;
3454         unsigned char state = 0;
3455         struct qdio_irq *irq = (struct qdio_irq *) q->irq_ptr;
3456
3457         /* This is the outbound handling of queues */
3458         qdio_do_qdio_fill_output(q,qidx,count,buffers);
3459
3460         used_elements=atomic_add_return(count, &q->number_of_buffers_used) - count;
3461
3462         if (callflags&QDIO_FLAG_DONT_SIGA) {
3463                 qdio_perf_stat_inc(&perf_stats.outbound_cnt);
3464                 return;
3465         }
3466         if (callflags & QDIO_FLAG_PCI_OUT)
3467                 q->is_pci_out = 1;
3468         else
3469                 q->is_pci_out = 0;
3470         if (q->is_iqdio_q) {
3471                 /* one siga for every sbal */
3472                 while (count--)
3473                         qdio_kick_outbound_q(q);
3474
3475                 __qdio_outbound_processing(q);
3476         } else {
3477                 /* under VM, we do a SIGA sync unconditionally */
3478                 SYNC_MEMORY;
3479                 else {
3480                         /*
3481                          * w/o shadow queues (else branch of
3482                          * SYNC_MEMORY :-/ ), we try to
3483                          * fast-requeue buffers
3484                          */
3485                         if (irq->is_qebsm) {
3486                                 cnt = 1;
3487                                 start_buf = ((qidx+QDIO_MAX_BUFFERS_PER_Q-1) &
3488                                              (QDIO_MAX_BUFFERS_PER_Q-1));
3489                                 qdio_do_eqbs(q, &state, &start_buf, &cnt);
3490                         } else
3491                                 state = q->slsb.acc.val[(qidx+QDIO_MAX_BUFFERS_PER_Q-1)
3492                                         &(QDIO_MAX_BUFFERS_PER_Q-1) ];
3493                          if (state != SLSB_CU_OUTPUT_PRIMED) {
3494                                 qdio_kick_outbound_q(q);
3495                         } else {
3496                                 QDIO_DBF_TEXT3(0,trace, "fast-req");
3497                                 qdio_perf_stat_inc(&perf_stats.fast_reqs);
3498                         }
3499                 }
3500                 /*
3501                  * only marking the q could take too long,
3502                  * the upper layer module could do a lot of
3503                  * traffic in that time
3504                  */
3505                 __qdio_outbound_processing(q);
3506         }
3507
3508         qdio_perf_stat_inc(&perf_stats.outbound_cnt);
3509 }
3510
3511 /* count must be 1 in iqdio */
3512 int
3513 do_QDIO(struct ccw_device *cdev,unsigned int callflags,
3514         unsigned int queue_number, unsigned int qidx,
3515         unsigned int count,struct qdio_buffer *buffers)
3516 {
3517         struct qdio_irq *irq_ptr;
3518 #ifdef CONFIG_QDIO_DEBUG
3519         char dbf_text[20];
3520
3521         sprintf(dbf_text,"doQD%04x",cdev->private->schid.sch_no);
3522         QDIO_DBF_TEXT3(0,trace,dbf_text);
3523 #endif /* CONFIG_QDIO_DEBUG */
3524
3525         if ( (qidx>QDIO_MAX_BUFFERS_PER_Q) ||
3526              (count>QDIO_MAX_BUFFERS_PER_Q) ||
3527              (queue_number>QDIO_MAX_QUEUES_PER_IRQ) )
3528                 return -EINVAL;
3529
3530         if (count==0)
3531                 return 0;
3532
3533         irq_ptr = cdev->private->qdio_data;
3534         if (!irq_ptr)
3535                 return -ENODEV;
3536
3537 #ifdef CONFIG_QDIO_DEBUG
3538         if (callflags&QDIO_FLAG_SYNC_INPUT)
3539                 QDIO_DBF_HEX3(0,trace,&irq_ptr->input_qs[queue_number],
3540                               sizeof(void*));
3541         else
3542                 QDIO_DBF_HEX3(0,trace,&irq_ptr->output_qs[queue_number],
3543                               sizeof(void*));
3544         sprintf(dbf_text,"flag%04x",callflags);
3545         QDIO_DBF_TEXT3(0,trace,dbf_text);
3546         sprintf(dbf_text,"qi%02xct%02x",qidx,count);
3547         QDIO_DBF_TEXT3(0,trace,dbf_text);
3548 #endif /* CONFIG_QDIO_DEBUG */
3549
3550         if (irq_ptr->state!=QDIO_IRQ_STATE_ACTIVE)
3551                 return -EBUSY;
3552
3553         if (callflags&QDIO_FLAG_SYNC_INPUT)
3554                 do_qdio_handle_inbound(irq_ptr->input_qs[queue_number],
3555                                        callflags, qidx, count, buffers);
3556         else if (callflags&QDIO_FLAG_SYNC_OUTPUT)
3557                 do_qdio_handle_outbound(irq_ptr->output_qs[queue_number],
3558                                         callflags, qidx, count, buffers);
3559         else {
3560                 QDIO_DBF_TEXT3(1,trace,"doQD:inv");
3561                 return -EINVAL;
3562         }
3563         return 0;
3564 }
3565
3566 static int
3567 qdio_perf_procfile_read(char *buffer, char **buffer_location, off_t offset,
3568                         int buffer_length, int *eof, void *data)
3569 {
3570         int c=0;
3571
3572         /* we are always called with buffer_length=4k, so we all
3573            deliver on the first read */
3574         if (offset>0)
3575                 return 0;
3576
3577 #define _OUTP_IT(x...) c+=sprintf(buffer+c,x)
3578 #ifdef CONFIG_64BIT
3579         _OUTP_IT("Number of tasklet runs (total)                  : %li\n",
3580                  (long)atomic64_read(&perf_stats.tl_runs));
3581         _OUTP_IT("Inbound tasklet runs      tried/retried         : %li/%li\n",
3582                  (long)atomic64_read(&perf_stats.inbound_tl_runs),
3583                  (long)atomic64_read(&perf_stats.inbound_tl_runs_resched));
3584         _OUTP_IT("Inbound-thin tasklet runs tried/retried         : %li/%li\n",
3585                  (long)atomic64_read(&perf_stats.inbound_thin_tl_runs),
3586                  (long)atomic64_read(&perf_stats.inbound_thin_tl_runs_resched));
3587         _OUTP_IT("Outbound tasklet runs     tried/retried         : %li/%li\n",
3588                  (long)atomic64_read(&perf_stats.outbound_tl_runs),
3589                  (long)atomic64_read(&perf_stats.outbound_tl_runs_resched));
3590         _OUTP_IT("\n");
3591         _OUTP_IT("Number of SIGA sync's issued                    : %li\n",
3592                  (long)atomic64_read(&perf_stats.siga_syncs));
3593         _OUTP_IT("Number of SIGA in's issued                      : %li\n",
3594                  (long)atomic64_read(&perf_stats.siga_ins));
3595         _OUTP_IT("Number of SIGA out's issued                     : %li\n",
3596                  (long)atomic64_read(&perf_stats.siga_outs));
3597         _OUTP_IT("Number of PCIs caught                           : %li\n",
3598                  (long)atomic64_read(&perf_stats.pcis));
3599         _OUTP_IT("Number of adapter interrupts caught             : %li\n",
3600                  (long)atomic64_read(&perf_stats.thinints));
3601         _OUTP_IT("Number of fast requeues (outg. SBALs w/o SIGA)  : %li\n",
3602                  (long)atomic64_read(&perf_stats.fast_reqs));
3603         _OUTP_IT("\n");
3604         _OUTP_IT("Number of inbound transfers                     : %li\n",
3605                  (long)atomic64_read(&perf_stats.inbound_cnt));
3606         _OUTP_IT("Number of do_QDIOs outbound                     : %li\n",
3607                  (long)atomic64_read(&perf_stats.outbound_cnt));
3608 #else /* CONFIG_64BIT */
3609         _OUTP_IT("Number of tasklet runs (total)                  : %i\n",
3610                  atomic_read(&perf_stats.tl_runs));
3611         _OUTP_IT("Inbound tasklet runs      tried/retried         : %i/%i\n",
3612                  atomic_read(&perf_stats.inbound_tl_runs),
3613                  atomic_read(&perf_stats.inbound_tl_runs_resched));
3614         _OUTP_IT("Inbound-thin tasklet runs tried/retried         : %i/%i\n",
3615                  atomic_read(&perf_stats.inbound_thin_tl_runs),
3616                  atomic_read(&perf_stats.inbound_thin_tl_runs_resched));
3617         _OUTP_IT("Outbound tasklet runs     tried/retried         : %i/%i\n",
3618                  atomic_read(&perf_stats.outbound_tl_runs),
3619                  atomic_read(&perf_stats.outbound_tl_runs_resched));
3620         _OUTP_IT("\n");
3621         _OUTP_IT("Number of SIGA sync's issued                    : %i\n",
3622                  atomic_read(&perf_stats.siga_syncs));
3623         _OUTP_IT("Number of SIGA in's issued                      : %i\n",
3624                  atomic_read(&perf_stats.siga_ins));
3625         _OUTP_IT("Number of SIGA out's issued                     : %i\n",
3626                  atomic_read(&perf_stats.siga_outs));
3627         _OUTP_IT("Number of PCIs caught                           : %i\n",
3628                  atomic_read(&perf_stats.pcis));
3629         _OUTP_IT("Number of adapter interrupts caught             : %i\n",
3630                  atomic_read(&perf_stats.thinints));
3631         _OUTP_IT("Number of fast requeues (outg. SBALs w/o SIGA)  : %i\n",
3632                  atomic_read(&perf_stats.fast_reqs));
3633         _OUTP_IT("\n");
3634         _OUTP_IT("Number of inbound transfers                     : %i\n",
3635                  atomic_read(&perf_stats.inbound_cnt));
3636         _OUTP_IT("Number of do_QDIOs outbound                     : %i\n",
3637                  atomic_read(&perf_stats.outbound_cnt));
3638 #endif /* CONFIG_64BIT */
3639         _OUTP_IT("\n");
3640
3641         return c;
3642 }
3643
3644 static struct proc_dir_entry *qdio_perf_proc_file;
3645
3646 static void
3647 qdio_add_procfs_entry(void)
3648 {
3649         proc_perf_file_registration=0;
3650         qdio_perf_proc_file=create_proc_entry(QDIO_PERF,
3651                                               S_IFREG|0444,&proc_root);
3652         if (qdio_perf_proc_file) {
3653                 qdio_perf_proc_file->read_proc=&qdio_perf_procfile_read;
3654         } else proc_perf_file_registration=-1;
3655
3656         if (proc_perf_file_registration)
3657                 QDIO_PRINT_WARN("was not able to register perf. " \
3658                                 "proc-file (%i).\n",
3659                                 proc_perf_file_registration);
3660 }
3661
3662 static void
3663 qdio_remove_procfs_entry(void)
3664 {
3665         if (!proc_perf_file_registration) /* means if it went ok earlier */
3666                 remove_proc_entry(QDIO_PERF,&proc_root);
3667 }
3668
3669 /**
3670  * attributes in sysfs
3671  *****************************************************************************/
3672
3673 static ssize_t
3674 qdio_performance_stats_show(struct bus_type *bus, char *buf)
3675 {
3676         return sprintf(buf, "%i\n", qdio_performance_stats ? 1 : 0);
3677 }
3678
3679 static ssize_t
3680 qdio_performance_stats_store(struct bus_type *bus, const char *buf, size_t count)
3681 {
3682         char *tmp;
3683         int i;
3684
3685         i = simple_strtoul(buf, &tmp, 16);
3686         if ((i == 0) || (i == 1)) {
3687                 if (i == qdio_performance_stats)
3688                         return count;
3689                 qdio_performance_stats = i;
3690                 if (i==0) {
3691                         /* reset perf. stat. info */
3692 #ifdef CONFIG_64BIT
3693                         atomic64_set(&perf_stats.tl_runs, 0);
3694                         atomic64_set(&perf_stats.outbound_tl_runs, 0);
3695                         atomic64_set(&perf_stats.inbound_tl_runs, 0);
3696                         atomic64_set(&perf_stats.inbound_tl_runs_resched, 0);
3697                         atomic64_set(&perf_stats.inbound_thin_tl_runs, 0);
3698                         atomic64_set(&perf_stats.inbound_thin_tl_runs_resched,
3699                                      0);
3700                         atomic64_set(&perf_stats.siga_outs, 0);
3701                         atomic64_set(&perf_stats.siga_ins, 0);
3702                         atomic64_set(&perf_stats.siga_syncs, 0);
3703                         atomic64_set(&perf_stats.pcis, 0);
3704                         atomic64_set(&perf_stats.thinints, 0);
3705                         atomic64_set(&perf_stats.fast_reqs, 0);
3706                         atomic64_set(&perf_stats.outbound_cnt, 0);
3707                         atomic64_set(&perf_stats.inbound_cnt, 0);
3708 #else /* CONFIG_64BIT */
3709                         atomic_set(&perf_stats.tl_runs, 0);
3710                         atomic_set(&perf_stats.outbound_tl_runs, 0);
3711                         atomic_set(&perf_stats.inbound_tl_runs, 0);
3712                         atomic_set(&perf_stats.inbound_tl_runs_resched, 0);
3713                         atomic_set(&perf_stats.inbound_thin_tl_runs, 0);
3714                         atomic_set(&perf_stats.inbound_thin_tl_runs_resched, 0);
3715                         atomic_set(&perf_stats.siga_outs, 0);
3716                         atomic_set(&perf_stats.siga_ins, 0);
3717                         atomic_set(&perf_stats.siga_syncs, 0);
3718                         atomic_set(&perf_stats.pcis, 0);
3719                         atomic_set(&perf_stats.thinints, 0);
3720                         atomic_set(&perf_stats.fast_reqs, 0);
3721                         atomic_set(&perf_stats.outbound_cnt, 0);
3722                         atomic_set(&perf_stats.inbound_cnt, 0);
3723 #endif /* CONFIG_64BIT */
3724                 }
3725         } else {
3726                 QDIO_PRINT_WARN("QDIO performance_stats: write 0 or 1 to this file!\n");
3727                 return -EINVAL;
3728         }
3729         return count;
3730 }
3731
3732 static BUS_ATTR(qdio_performance_stats, 0644, qdio_performance_stats_show,
3733                         qdio_performance_stats_store);
3734
3735 static void
3736 tiqdio_register_thinints(void)
3737 {
3738         char dbf_text[20];
3739         register_thinint_result=
3740                 s390_register_adapter_interrupt(&tiqdio_thinint_handler);
3741         if (register_thinint_result) {
3742                 sprintf(dbf_text,"regthn%x",(register_thinint_result&0xff));
3743                 QDIO_DBF_TEXT0(0,setup,dbf_text);
3744                 QDIO_PRINT_ERR("failed to register adapter handler " \
3745                                "(rc=%i).\nAdapter interrupts might " \
3746                                "not work. Continuing.\n",
3747                                register_thinint_result);
3748         }
3749 }
3750
3751 static void
3752 tiqdio_unregister_thinints(void)
3753 {
3754         if (!register_thinint_result)
3755                 s390_unregister_adapter_interrupt(&tiqdio_thinint_handler);
3756 }
3757
3758 static int
3759 qdio_get_qdio_memory(void)
3760 {
3761         int i;
3762         indicator_used[0]=1;
3763
3764         for (i=1;i<INDICATORS_PER_CACHELINE;i++)
3765                 indicator_used[i]=0;
3766         indicators = kzalloc(sizeof(__u32)*(INDICATORS_PER_CACHELINE),
3767                                    GFP_KERNEL);
3768         if (!indicators)
3769                 return -ENOMEM;
3770         return 0;
3771 }
3772
3773 static void
3774 qdio_release_qdio_memory(void)
3775 {
3776         kfree(indicators);
3777 }
3778
3779
3780 static void
3781 qdio_unregister_dbf_views(void)
3782 {
3783         if (qdio_dbf_setup)
3784                 debug_unregister(qdio_dbf_setup);
3785         if (qdio_dbf_sbal)
3786                 debug_unregister(qdio_dbf_sbal);
3787         if (qdio_dbf_sense)
3788                 debug_unregister(qdio_dbf_sense);
3789         if (qdio_dbf_trace)
3790                 debug_unregister(qdio_dbf_trace);
3791 #ifdef CONFIG_QDIO_DEBUG
3792         if (qdio_dbf_slsb_out)
3793                 debug_unregister(qdio_dbf_slsb_out);
3794         if (qdio_dbf_slsb_in)
3795                 debug_unregister(qdio_dbf_slsb_in);
3796 #endif /* CONFIG_QDIO_DEBUG */
3797 }
3798
3799 static int
3800 qdio_register_dbf_views(void)
3801 {
3802         qdio_dbf_setup=debug_register(QDIO_DBF_SETUP_NAME,
3803                                       QDIO_DBF_SETUP_PAGES,
3804                                       QDIO_DBF_SETUP_NR_AREAS,
3805                                       QDIO_DBF_SETUP_LEN);
3806         if (!qdio_dbf_setup)
3807                 goto oom;
3808         debug_register_view(qdio_dbf_setup,&debug_hex_ascii_view);
3809         debug_set_level(qdio_dbf_setup,QDIO_DBF_SETUP_LEVEL);
3810
3811         qdio_dbf_sbal=debug_register(QDIO_DBF_SBAL_NAME,
3812                                      QDIO_DBF_SBAL_PAGES,
3813                                      QDIO_DBF_SBAL_NR_AREAS,
3814                                      QDIO_DBF_SBAL_LEN);
3815         if (!qdio_dbf_sbal)
3816                 goto oom;
3817
3818         debug_register_view(qdio_dbf_sbal,&debug_hex_ascii_view);
3819         debug_set_level(qdio_dbf_sbal,QDIO_DBF_SBAL_LEVEL);
3820
3821         qdio_dbf_sense=debug_register(QDIO_DBF_SENSE_NAME,
3822                                       QDIO_DBF_SENSE_PAGES,
3823                                       QDIO_DBF_SENSE_NR_AREAS,
3824                                       QDIO_DBF_SENSE_LEN);
3825         if (!qdio_dbf_sense)
3826                 goto oom;
3827
3828         debug_register_view(qdio_dbf_sense,&debug_hex_ascii_view);
3829         debug_set_level(qdio_dbf_sense,QDIO_DBF_SENSE_LEVEL);
3830
3831         qdio_dbf_trace=debug_register(QDIO_DBF_TRACE_NAME,
3832                                       QDIO_DBF_TRACE_PAGES,
3833                                       QDIO_DBF_TRACE_NR_AREAS,
3834                                       QDIO_DBF_TRACE_LEN);
3835         if (!qdio_dbf_trace)
3836                 goto oom;
3837
3838         debug_register_view(qdio_dbf_trace,&debug_hex_ascii_view);
3839         debug_set_level(qdio_dbf_trace,QDIO_DBF_TRACE_LEVEL);
3840
3841 #ifdef CONFIG_QDIO_DEBUG
3842         qdio_dbf_slsb_out=debug_register(QDIO_DBF_SLSB_OUT_NAME,
3843                                          QDIO_DBF_SLSB_OUT_PAGES,
3844                                          QDIO_DBF_SLSB_OUT_NR_AREAS,
3845                                          QDIO_DBF_SLSB_OUT_LEN);
3846         if (!qdio_dbf_slsb_out)
3847                 goto oom;
3848         debug_register_view(qdio_dbf_slsb_out,&debug_hex_ascii_view);
3849         debug_set_level(qdio_dbf_slsb_out,QDIO_DBF_SLSB_OUT_LEVEL);
3850
3851         qdio_dbf_slsb_in=debug_register(QDIO_DBF_SLSB_IN_NAME,
3852                                         QDIO_DBF_SLSB_IN_PAGES,
3853                                         QDIO_DBF_SLSB_IN_NR_AREAS,
3854                                         QDIO_DBF_SLSB_IN_LEN);
3855         if (!qdio_dbf_slsb_in)
3856                 goto oom;
3857         debug_register_view(qdio_dbf_slsb_in,&debug_hex_ascii_view);
3858         debug_set_level(qdio_dbf_slsb_in,QDIO_DBF_SLSB_IN_LEVEL);
3859 #endif /* CONFIG_QDIO_DEBUG */
3860         return 0;
3861 oom:
3862         QDIO_PRINT_ERR("not enough memory for dbf.\n");
3863         qdio_unregister_dbf_views();
3864         return -ENOMEM;
3865 }
3866
3867 static void *qdio_mempool_alloc(gfp_t gfp_mask, void *size)
3868 {
3869         return (void *) get_zeroed_page(gfp_mask|GFP_DMA);
3870 }
3871
3872 static void qdio_mempool_free(void *element, void *size)
3873 {
3874         free_page((unsigned long) element);
3875 }
3876
3877 static int __init
3878 init_QDIO(void)
3879 {
3880         int res;
3881         void *ptr;
3882
3883         printk("qdio: loading %s\n",version);
3884
3885         res=qdio_get_qdio_memory();
3886         if (res)
3887                 return res;
3888
3889         qdio_q_cache = kmem_cache_create("qdio_q", sizeof(struct qdio_q),
3890                                          256, 0, NULL);
3891         if (!qdio_q_cache) {
3892                 qdio_release_qdio_memory();
3893                 return -ENOMEM;
3894         }
3895
3896         res = qdio_register_dbf_views();
3897         if (res) {
3898                 kmem_cache_destroy(qdio_q_cache);
3899                 qdio_release_qdio_memory();
3900                 return res;
3901         }
3902
3903         QDIO_DBF_TEXT0(0,setup,"initQDIO");
3904         res = bus_create_file(&ccw_bus_type, &bus_attr_qdio_performance_stats);
3905
3906         memset((void*)&perf_stats,0,sizeof(perf_stats));
3907         QDIO_DBF_TEXT0(0,setup,"perfstat");
3908         ptr=&perf_stats;
3909         QDIO_DBF_HEX0(0,setup,&ptr,sizeof(void*));
3910
3911         qdio_add_procfs_entry();
3912
3913         qdio_mempool_scssc = mempool_create(QDIO_MEMPOOL_SCSSC_ELEMENTS,
3914                                             qdio_mempool_alloc,
3915                                             qdio_mempool_free, NULL);
3916
3917         if (tiqdio_check_chsc_availability())
3918                 QDIO_PRINT_ERR("Not all CHSCs supported. Continuing.\n");
3919
3920         tiqdio_register_thinints();
3921
3922         return 0;
3923  }
3924
3925 static void __exit
3926 cleanup_QDIO(void)
3927 {
3928         tiqdio_unregister_thinints();
3929         qdio_remove_procfs_entry();
3930         qdio_release_qdio_memory();
3931         qdio_unregister_dbf_views();
3932         mempool_destroy(qdio_mempool_scssc);
3933         kmem_cache_destroy(qdio_q_cache);
3934         bus_remove_file(&ccw_bus_type, &bus_attr_qdio_performance_stats);
3935         printk("qdio: %s: module removed\n",version);
3936 }
3937
3938 module_init(init_QDIO);
3939 module_exit(cleanup_QDIO);
3940
3941 EXPORT_SYMBOL(qdio_allocate);
3942 EXPORT_SYMBOL(qdio_establish);
3943 EXPORT_SYMBOL(qdio_initialize);
3944 EXPORT_SYMBOL(qdio_activate);
3945 EXPORT_SYMBOL(do_QDIO);
3946 EXPORT_SYMBOL(qdio_shutdown);
3947 EXPORT_SYMBOL(qdio_free);
3948 EXPORT_SYMBOL(qdio_cleanup);
3949 EXPORT_SYMBOL(qdio_synchronize);