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/config.h>
  34 #include <linux/module.h>
  35 #include <linux/init.h>
  36
  37 #include <linux/slab.h>
  38 #include <linux/kernel.h>
  39 #include <linux/proc_fs.h>
  40 #include <linux/timer.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/qdio.h>
  50
  51 #include "cio.h"
  52 #include "css.h"
  53 #include "device.h"
  54 #include "airq.h"
  55 #include "qdio.h"
  56 #include "ioasm.h"
  57 #include "chsc.h"
  58
  59 /****************** MODULE PARAMETER VARIABLES ********************/
  60 MODULE_AUTHOR("Utz Bacher <utz.bacher@de.ibm.com>");
  61 MODULE_DESCRIPTION("QDIO base support version 2, " \
  62                    "Copyright 2000 IBM Corporation");
  63 MODULE_LICENSE("GPL");
  64
  65 /******************** HERE WE GO ***********************************/
  66
  67 static const char version[] = "QDIO base support version 2";
  68
  69 #ifdef QDIO_PERFORMANCE_STATS
  70 static int proc_perf_file_registration;
  71 static unsigned long i_p_c, i_p_nc, o_p_c, o_p_nc, ii_p_c, ii_p_nc;
  72 static struct qdio_perf_stats perf_stats;
  73 #endif /* QDIO_PERFORMANCE_STATS */
  74
  75 static int hydra_thinints;
  76 static int is_passthrough = 0;
  77 static int omit_svs;
  78
  79 static int indicator_used[INDICATORS_PER_CACHELINE];
  80 static __u32 * volatile indicators;
  81 static __u32 volatile spare_indicator;
  82 static atomic_t spare_indicator_usecount;
  83
  84 static debug_info_t *qdio_dbf_setup;
  85 static debug_info_t *qdio_dbf_sbal;
  86 static debug_info_t *qdio_dbf_trace;
  87 static debug_info_t *qdio_dbf_sense;
  88 #ifdef CONFIG_QDIO_DEBUG
  89 static debug_info_t *qdio_dbf_slsb_out;
  90 static debug_info_t *qdio_dbf_slsb_in;
  91 #endif /* CONFIG_QDIO_DEBUG */
  92
  93 /* iQDIO stuff: */
  94 static volatile struct qdio_q *tiq_list=NULL; /* volatile as it could change
  95                                                  during a while loop */
  96 static DEFINE_SPINLOCK(ttiq_list_lock);
  97 static int register_thinint_result;
  98 static void tiqdio_tl(unsigned long);
  99 static DECLARE_TASKLET(tiqdio_tasklet,tiqdio_tl,0);
 100
 101 /* not a macro, as one of the arguments is atomic_read */
 102 static inline int
 103 qdio_min(int a,int b)
 104 {
 105         if (a<b)
 106                 return a;
 107         else
 108                 return b;
 109 }
 110
 111 /***************** SCRUBBER HELPER ROUTINES **********************/
 112
 113 static inline __u64
 114 qdio_get_micros(void)
 115 {
 116         return (get_clock() >> 10); /* time>>12 is microseconds */
 117 }
 118
 119 /*
 120  * unfortunately, we can't just xchg the values; in do_QDIO we want to reserve
 121  * the q in any case, so that we'll not be interrupted when we are in
 122  * qdio_mark_tiq... shouldn't have a really bad impact, as reserving almost
 123  * ever works (last famous words)
 124  */
 125 static inline int
 126 qdio_reserve_q(struct qdio_q *q)
 127 {
 128         return atomic_add_return(1,&q->use_count) - 1;
 129 }
 130
 131 static inline void
 132 qdio_release_q(struct qdio_q *q)
 133 {
 134         atomic_dec(&q->use_count);
 135 }
 136
 137 /*check ccq  */
 138 static inline int
 139 qdio_check_ccq(struct qdio_q *q, unsigned int ccq)
 140 {
 141         char dbf_text[15];
 142
 143         if (ccq == 0 || ccq == 32 || ccq == 96)
 144                 return 0;
 145         if (ccq == 97)
 146                 return 1;
 147         /*notify devices immediately*/
 148         sprintf(dbf_text,"%d", ccq);
 149         QDIO_DBF_TEXT2(1,trace,dbf_text);
 150         return -EIO;
 151 }
 152 /* EQBS: extract buffer states */
 153 static inline int
 154 qdio_do_eqbs(struct qdio_q *q, unsigned char *state,
 155              unsigned int *start, unsigned int *cnt)
 156 {
 157         struct qdio_irq *irq;
 158         unsigned int tmp_cnt, q_no, ccq;
 159         int rc ;
 160         char dbf_text[15];
 161
 162         ccq = 0;
 163         tmp_cnt = *cnt;
 164         irq = (struct qdio_irq*)q->irq_ptr;
 165         q_no = q->q_no;
 166         if(!q->is_input_q)
 167                 q_no += irq->no_input_qs;
 168 again:
 169         ccq = do_eqbs(irq->sch_token, state, q_no, start, cnt);
 170         rc = qdio_check_ccq(q, ccq);
 171         if (rc == 1) {
 172                 QDIO_DBF_TEXT5(1,trace,"eqAGAIN");
 173                 goto again;
 174         }
 175         if (rc < 0) {
 176                 QDIO_DBF_TEXT2(1,trace,"eqberr");
 177                 sprintf(dbf_text,"%2x,%2x,%d,%d",tmp_cnt, *cnt, ccq, q_no);
 178                 QDIO_DBF_TEXT2(1,trace,dbf_text);
 179                 q->handler(q->cdev,QDIO_STATUS_ACTIVATE_CHECK_CONDITION|
 180                                 QDIO_STATUS_LOOK_FOR_ERROR,
 181                                 0, 0, 0, -1, -1, q->int_parm);
 182                 return 0;
 183         }
 184         return (tmp_cnt - *cnt);
 185 }
 186
 187 /* SQBS: set buffer states */
 188 static inline int
 189 qdio_do_sqbs(struct qdio_q *q, unsigned char state,
 190              unsigned int *start, unsigned int *cnt)
 191 {
 192         struct qdio_irq *irq;
 193         unsigned int tmp_cnt, q_no, ccq;
 194         int rc;
 195         char dbf_text[15];
 196
 197         ccq = 0;
 198         tmp_cnt = *cnt;
 199         irq = (struct qdio_irq*)q->irq_ptr;
 200         q_no = q->q_no;
 201         if(!q->is_input_q)
 202                 q_no += irq->no_input_qs;
 203 again:
 204         ccq = do_sqbs(irq->sch_token, state, q_no, start, cnt);
 205         rc = qdio_check_ccq(q, ccq);
 206         if (rc == 1) {
 207                 QDIO_DBF_TEXT5(1,trace,"sqAGAIN");
 208                 goto again;
 209         }
 210         if (rc < 0) {
 211                 QDIO_DBF_TEXT3(1,trace,"sqberr");
 212                 sprintf(dbf_text,"%2x,%2x,%d,%d",tmp_cnt,*cnt,ccq,q_no);
 213                 QDIO_DBF_TEXT3(1,trace,dbf_text);
 214                 q->handler(q->cdev,QDIO_STATUS_ACTIVATE_CHECK_CONDITION|
 215                                 QDIO_STATUS_LOOK_FOR_ERROR,
 216                                 0, 0, 0, -1, -1, q->int_parm);
 217                 return 0;
 218         }
 219         return (tmp_cnt - *cnt);
 220 }
 221
 222 static inline int
 223 qdio_set_slsb(struct qdio_q *q, unsigned int *bufno,
 224               unsigned char state, unsigned int *count)
 225 {
 226         volatile char *slsb;
 227         struct qdio_irq *irq;
 228
 229         irq = (struct qdio_irq*)q->irq_ptr;
 230         if (!irq->is_qebsm) {
 231                 slsb = (char *)&q->slsb.acc.val[(*bufno)];
 232                 xchg(slsb, state);
 233                 return 1;
 234         }
 235         return qdio_do_sqbs(q, state, bufno, count);
 236 }
 237
 238 #ifdef CONFIG_QDIO_DEBUG
 239 static inline void
 240 qdio_trace_slsb(struct qdio_q *q)
 241 {
 242         if (q->queue_type==QDIO_TRACE_QTYPE) {
 243                 if (q->is_input_q)
 244                         QDIO_DBF_HEX2(0,slsb_in,&q->slsb,
 245                                       QDIO_MAX_BUFFERS_PER_Q);
 246                 else
 247                         QDIO_DBF_HEX2(0,slsb_out,&q->slsb,
 248                                       QDIO_MAX_BUFFERS_PER_Q);
 249         }
 250 }
 251 #endif
 252
 253 static inline int
 254 set_slsb(struct qdio_q *q, unsigned int *bufno,
 255          unsigned char state, unsigned int *count)
 256 {
 257         int rc;
 258 #ifdef CONFIG_QDIO_DEBUG
 259         qdio_trace_slsb(q);
 260 #endif
 261         rc = qdio_set_slsb(q, bufno, state, count);
 262 #ifdef CONFIG_QDIO_DEBUG
 263         qdio_trace_slsb(q);
 264 #endif
 265         return rc;
 266 }
 267 static inline int
 268 qdio_siga_sync(struct qdio_q *q, unsigned int gpr2,
 269                unsigned int gpr3)
 270 {
 271         int cc;
 272
 273         QDIO_DBF_TEXT4(0,trace,"sigasync");
 274         QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
 275
 276 #ifdef QDIO_PERFORMANCE_STATS
 277         perf_stats.siga_syncs++;
 278 #endif /* QDIO_PERFORMANCE_STATS */
 279
 280         cc = do_siga_sync(q->schid, gpr2, gpr3);
 281         if (cc)
 282                 QDIO_DBF_HEX3(0,trace,&cc,sizeof(int*));
 283
 284         return cc;
 285 }
 286
 287 static inline int
 288 qdio_siga_sync_q(struct qdio_q *q)
 289 {
 290         if (q->is_input_q)
 291                 return qdio_siga_sync(q, 0, q->mask);
 292         return qdio_siga_sync(q, q->mask, 0);
 293 }
 294
 295 static int
 296 __do_siga_output(struct qdio_q *q, unsigned int *busy_bit)
 297 {
 298        struct qdio_irq *irq;
 299        unsigned int fc = 0;
 300        unsigned long schid;
 301
 302        irq = (struct qdio_irq *) q->irq_ptr;
 303        if (!irq->is_qebsm)
 304                schid = *((u32 *)&q->schid);
 305        else {
 306                schid = irq->sch_token;
 307                fc |= 0x80;
 308        }
 309        return do_siga_output(schid, q->mask, busy_bit, fc);
 310 }
 311
 312 /*
 313  * returns QDIO_SIGA_ERROR_ACCESS_EXCEPTION as cc, when SIGA returns
 314  * an access exception
 315  */
 316 static inline int
 317 qdio_siga_output(struct qdio_q *q)
 318 {
 319         int cc;
 320         __u32 busy_bit;
 321         __u64 start_time=0;
 322
 323 #ifdef QDIO_PERFORMANCE_STATS
 324         perf_stats.siga_outs++;
 325 #endif /* QDIO_PERFORMANCE_STATS */
 326
 327         QDIO_DBF_TEXT4(0,trace,"sigaout");
 328         QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
 329
 330         for (;;) {
 331                 cc = __do_siga_output(q, &busy_bit);
 332 //QDIO_PRINT_ERR("cc=%x, busy=%x\n",cc,busy_bit);
 333                 if ((cc==2) && (busy_bit) && (q->is_iqdio_q)) {
 334                         if (!start_time)
 335                                 start_time=NOW;
 336                         if ((NOW-start_time)>QDIO_BUSY_BIT_PATIENCE)
 337                                 break;
 338                 } else
 339                         break;
 340         }
 341
 342         if ((cc==2) && (busy_bit))
 343                 cc |= QDIO_SIGA_ERROR_B_BIT_SET;
 344
 345         if (cc)
 346                 QDIO_DBF_HEX3(0,trace,&cc,sizeof(int*));
 347
 348         return cc;
 349 }
 350
 351 static inline int
 352 qdio_siga_input(struct qdio_q *q)
 353 {
 354         int cc;
 355
 356         QDIO_DBF_TEXT4(0,trace,"sigain");
 357         QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
 358
 359 #ifdef QDIO_PERFORMANCE_STATS
 360         perf_stats.siga_ins++;
 361 #endif /* QDIO_PERFORMANCE_STATS */
 362
 363         cc = do_siga_input(q->schid, q->mask);
 364
 365         if (cc)
 366                 QDIO_DBF_HEX3(0,trace,&cc,sizeof(int*));
 367
 368         return cc;
 369 }
 370
 371 /* locked by the locks in qdio_activate and qdio_cleanup */
 372 static __u32 *
 373 qdio_get_indicator(void)
 374 {
 375         int i;
 376
 377         for (i=1;i<INDICATORS_PER_CACHELINE;i++)
 378                 if (!indicator_used[i]) {
 379                         indicator_used[i]=1;
 380                         return indicators+i;
 381                 }
 382         atomic_inc(&spare_indicator_usecount);
 383         return (__u32 * volatile) &spare_indicator;
 384 }
 385
 386 /* locked by the locks in qdio_activate and qdio_cleanup */
 387 static void
 388 qdio_put_indicator(__u32 *addr)
 389 {
 390         int i;
 391
 392         if ( (addr) && (addr!=&spare_indicator) ) {
 393                 i=addr-indicators;
 394                 indicator_used[i]=0;
 395         }
 396         if (addr == &spare_indicator)
 397                 atomic_dec(&spare_indicator_usecount);
 398 }
 399
 400 static inline void
 401 tiqdio_clear_summary_bit(__u32 *location)
 402 {
 403         QDIO_DBF_TEXT5(0,trace,"clrsummb");
 404         QDIO_DBF_HEX5(0,trace,&location,sizeof(void*));
 405
 406         xchg(location,0);
 407 }
 408
 409 static inline  void
 410 tiqdio_set_summary_bit(__u32 *location)
 411 {
 412         QDIO_DBF_TEXT5(0,trace,"setsummb");
 413         QDIO_DBF_HEX5(0,trace,&location,sizeof(void*));
 414
 415         xchg(location,-1);
 416 }
 417
 418 static inline void
 419 tiqdio_sched_tl(void)
 420 {
 421         tasklet_hi_schedule(&tiqdio_tasklet);
 422 }
 423
 424 static inline void
 425 qdio_mark_tiq(struct qdio_q *q)
 426 {
 427         unsigned long flags;
 428
 429         QDIO_DBF_TEXT4(0,trace,"mark iq");
 430         QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
 431
 432         spin_lock_irqsave(&ttiq_list_lock,flags);
 433         if (unlikely(atomic_read(&q->is_in_shutdown)))
 434                 goto out_unlock;
 435
 436         if (!q->is_input_q)
 437                 goto out_unlock;
 438
 439         if ((q->list_prev) || (q->list_next))
 440                 goto out_unlock;
 441
 442         if (!tiq_list) {
 443                 tiq_list=q;
 444                 q->list_prev=q;
 445                 q->list_next=q;
 446         } else {
 447                 q->list_next=tiq_list;
 448                 q->list_prev=tiq_list->list_prev;
 449                 tiq_list->list_prev->list_next=q;
 450                 tiq_list->list_prev=q;
 451         }
 452         spin_unlock_irqrestore(&ttiq_list_lock,flags);
 453
 454         tiqdio_set_summary_bit((__u32*)q->dev_st_chg_ind);
 455         tiqdio_sched_tl();
 456         return;
 457 out_unlock:
 458         spin_unlock_irqrestore(&ttiq_list_lock,flags);
 459         return;
 460 }
 461
 462 static inline void
 463 qdio_mark_q(struct qdio_q *q)
 464 {
 465         QDIO_DBF_TEXT4(0,trace,"mark q");
 466         QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
 467
 468         if (unlikely(atomic_read(&q->is_in_shutdown)))
 469                 return;
 470
 471         tasklet_schedule(&q->tasklet);
 472 }
 473
 474 static inline int
 475 qdio_stop_polling(struct qdio_q *q)
 476 {
 477 #ifdef QDIO_USE_PROCESSING_STATE
 478        unsigned int tmp, gsf, count = 1;
 479        unsigned char state = 0;
 480        struct qdio_irq *irq = (struct qdio_irq *) q->irq_ptr;
 481
 482         if (!atomic_swap(&q->polling,0))
 483                 return 1;
 484
 485         QDIO_DBF_TEXT4(0,trace,"stoppoll");
 486         QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
 487
 488         /* show the card that we are not polling anymore */
 489         if (!q->is_input_q)
 490                 return 1;
 491
 492        tmp = gsf = GET_SAVED_FRONTIER(q);
 493        tmp = ((tmp + QDIO_MAX_BUFFERS_PER_Q-1) & (QDIO_MAX_BUFFERS_PER_Q-1) );
 494        set_slsb(q, &tmp, SLSB_P_INPUT_NOT_INIT, &count);
 495
 496         /*
 497          * we don't issue this SYNC_MEMORY, as we trust Rick T and
 498          * moreover will not use the PROCESSING state under VM, so
 499          * q->polling was 0 anyway
 500          */
 501         /*SYNC_MEMORY;*/
 502        if (irq->is_qebsm) {
 503                count = 1;
 504                qdio_do_eqbs(q, &state, &gsf, &count);
 505        } else
 506                state = q->slsb.acc.val[gsf];
 507        if (state != SLSB_P_INPUT_PRIMED)
 508                 return 1;
 509         /*
 510          * set our summary bit again, as otherwise there is a
 511          * small window we can miss between resetting it and
 512          * checking for PRIMED state
 513          */
 514         if (q->is_thinint_q)
 515                 tiqdio_set_summary_bit((__u32*)q->dev_st_chg_ind);
 516         return 0;
 517
 518 #else /* QDIO_USE_PROCESSING_STATE */
 519         return 1;
 520 #endif /* QDIO_USE_PROCESSING_STATE */
 521 }
 522
 523 /*
 524  * see the comment in do_QDIO and before qdio_reserve_q about the
 525  * sophisticated locking outside of unmark_q, so that we don't need to
 526  * disable the interrupts :-)
 527 */
 528 static inline void
 529 qdio_unmark_q(struct qdio_q *q)
 530 {
 531         unsigned long flags;
 532
 533         QDIO_DBF_TEXT4(0,trace,"unmark q");
 534         QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
 535
 536         if ((!q->list_prev)||(!q->list_next))
 537                 return;
 538
 539         if ((q->is_thinint_q)&&(q->is_input_q)) {
 540                 /* iQDIO */
 541                 spin_lock_irqsave(&ttiq_list_lock,flags);
 542                 /* in case cleanup has done this already and simultanously
 543                  * qdio_unmark_q is called from the interrupt handler, we've
 544                  * got to check this in this specific case again */
 545                 if ((!q->list_prev)||(!q->list_next))
 546                         goto out;
 547                 if (q->list_next==q) {
 548                         /* q was the only interesting q */
 549                         tiq_list=NULL;
 550                         q->list_next=NULL;
 551                         q->list_prev=NULL;
 552                 } else {
 553                         q->list_next->list_prev=q->list_prev;
 554                         q->list_prev->list_next=q->list_next;
 555                         tiq_list=q->list_next;
 556                         q->list_next=NULL;
 557                         q->list_prev=NULL;
 558                 }
 559 out:
 560                 spin_unlock_irqrestore(&ttiq_list_lock,flags);
 561         }
 562 }
 563
 564 static inline unsigned long
 565 tiqdio_clear_global_summary(void)
 566 {
 567         unsigned long time;
 568
 569         QDIO_DBF_TEXT5(0,trace,"clrglobl");
 570
 571         time = do_clear_global_summary();
 572
 573         QDIO_DBF_HEX5(0,trace,&time,sizeof(unsigned long));
 574
 575         return time;
 576 }
 577
 578
 579 /************************* OUTBOUND ROUTINES *******************************/
 580 static int
 581 qdio_qebsm_get_outbound_buffer_frontier(struct qdio_q *q)
 582 {
 583         struct qdio_irq *irq;
 584         unsigned char state;
 585         unsigned int cnt, count, ftc;
 586
 587         irq = (struct qdio_irq *) q->irq_ptr;
 588         if ((!q->is_iqdio_q) && (!q->hydra_gives_outbound_pcis))
 589                 SYNC_MEMORY;
 590
 591         ftc = q->first_to_check;
 592         count = qdio_min(atomic_read(&q->number_of_buffers_used),
 593                         (QDIO_MAX_BUFFERS_PER_Q-1));
 594         if (count == 0)
 595                 return q->first_to_check;
 596         cnt = qdio_do_eqbs(q, &state, &ftc, &count);
 597         if (cnt == 0)
 598                 return q->first_to_check;
 599         switch (state) {
 600         case SLSB_P_OUTPUT_ERROR:
 601                 QDIO_DBF_TEXT3(0,trace,"outperr");
 602                 atomic_sub(cnt , &q->number_of_buffers_used);
 603                 if (q->qdio_error)
 604                         q->error_status_flags |=
 605                                 QDIO_STATUS_MORE_THAN_ONE_QDIO_ERROR;
 606                 q->qdio_error = SLSB_P_OUTPUT_ERROR;
 607                 q->error_status_flags |= QDIO_STATUS_LOOK_FOR_ERROR;
 608                 q->first_to_check = ftc;
 609                 break;
 610         case SLSB_P_OUTPUT_EMPTY:
 611                 QDIO_DBF_TEXT5(0,trace,"outpempt");
 612                 atomic_sub(cnt, &q->number_of_buffers_used);
 613                 q->first_to_check = ftc;
 614                 break;
 615         case SLSB_CU_OUTPUT_PRIMED:
 616                 /* all buffers primed */
 617                 QDIO_DBF_TEXT5(0,trace,"outpprim");
 618                 break;
 619         default:
 620                 break;
 621         }
 622         QDIO_DBF_HEX4(0,trace,&q->first_to_check,sizeof(int));
 623         return q->first_to_check;
 624 }
 625
 626 static int
 627 qdio_qebsm_get_inbound_buffer_frontier(struct qdio_q *q)
 628 {
 629         struct qdio_irq *irq;
 630         unsigned char state;
 631         int tmp, ftc, count, cnt;
 632         char dbf_text[15];
 633
 634
 635         irq = (struct qdio_irq *) q->irq_ptr;
 636         ftc = q->first_to_check;
 637         count = qdio_min(atomic_read(&q->number_of_buffers_used),
 638                         (QDIO_MAX_BUFFERS_PER_Q-1));
 639         if (count == 0)
 640                  return q->first_to_check;
 641         cnt = qdio_do_eqbs(q, &state, &ftc, &count);
 642         if (cnt == 0)
 643                  return q->first_to_check;
 644         switch (state) {
 645         case SLSB_P_INPUT_ERROR :
 646 #ifdef CONFIG_QDIO_DEBUG
 647                 QDIO_DBF_TEXT3(1,trace,"inperr");
 648                 sprintf(dbf_text,"%2x,%2x",ftc,count);
 649                 QDIO_DBF_TEXT3(1,trace,dbf_text);
 650 #endif /* CONFIG_QDIO_DEBUG */
 651                 if (q->qdio_error)
 652                         q->error_status_flags |=
 653                                 QDIO_STATUS_MORE_THAN_ONE_QDIO_ERROR;
 654                 q->qdio_error = SLSB_P_INPUT_ERROR;
 655                 q->error_status_flags |= QDIO_STATUS_LOOK_FOR_ERROR;
 656                 atomic_sub(cnt, &q->number_of_buffers_used);
 657                 q->first_to_check = ftc;
 658                 break;
 659         case SLSB_P_INPUT_PRIMED :
 660                 QDIO_DBF_TEXT3(0,trace,"inptprim");
 661                 sprintf(dbf_text,"%2x,%2x",ftc,count);
 662                 QDIO_DBF_TEXT3(1,trace,dbf_text);
 663                 tmp = 0;
 664                 ftc = q->first_to_check;
 665 #ifdef QDIO_USE_PROCESSING_STATE
 666                 if (cnt > 1) {
 667                         cnt -= 1;
 668                         tmp = set_slsb(q, &ftc, SLSB_P_INPUT_NOT_INIT, &cnt);
 669                         if (!tmp)
 670                                 break;
 671                 }
 672                 cnt = 1;
 673                 tmp += set_slsb(q, &ftc,
 674                                SLSB_P_INPUT_PROCESSING, &cnt);
 675                 atomic_set(&q->polling, 1);
 676 #else
 677                 tmp = set_slsb(q, &ftc, SLSB_P_INPUT_NOT_INIT, &cnt);
 678 #endif
 679                 atomic_sub(tmp, &q->number_of_buffers_used);
 680                 q->first_to_check = ftc;
 681                 break;
 682         case SLSB_CU_INPUT_EMPTY:
 683         case SLSB_P_INPUT_NOT_INIT:
 684         case SLSB_P_INPUT_PROCESSING:
 685                 QDIO_DBF_TEXT5(0,trace,"inpnipro");
 686                 break;
 687         default:
 688                 break;
 689         }
 690         QDIO_DBF_HEX4(0,trace,&q->first_to_check,sizeof(int));
 691         return q->first_to_check;
 692 }
 693
 694 static inline int
 695 qdio_get_outbound_buffer_frontier(struct qdio_q *q)
 696 {
 697         struct qdio_irq *irq;
 698         volatile char *slsb;
 699         unsigned int count = 1;
 700         int first_not_to_check, f, f_mod_no;
 701         char dbf_text[15];
 702
 703         QDIO_DBF_TEXT4(0,trace,"getobfro");
 704         QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
 705
 706         irq = (struct qdio_irq *) q->irq_ptr;
 707         if (irq->is_qebsm)
 708                 return qdio_qebsm_get_outbound_buffer_frontier(q);
 709
 710         slsb=&q->slsb.acc.val[0];
 711         f_mod_no=f=q->first_to_check;
 712         /*
 713          * f points to already processed elements, so f+no_used is correct...
 714          * ... but: we don't check 128 buffers, as otherwise
 715          * qdio_has_outbound_q_moved would return 0
 716          */
 717         first_not_to_check=f+qdio_min(atomic_read(&q->number_of_buffers_used),
 718                                       (QDIO_MAX_BUFFERS_PER_Q-1));
 719
 720         if ((!q->is_iqdio_q)&&(!q->hydra_gives_outbound_pcis))
 721                 SYNC_MEMORY;
 722
 723 check_next:
 724         if (f==first_not_to_check)
 725                 goto out;
 726
 727         switch(slsb[f_mod_no]) {
 728
 729         /* the adapter has not fetched the output yet */
 730         case SLSB_CU_OUTPUT_PRIMED:
 731                 QDIO_DBF_TEXT5(0,trace,"outpprim");
 732                 break;
 733
 734         /* the adapter got it */
 735         case SLSB_P_OUTPUT_EMPTY:
 736                 atomic_dec(&q->number_of_buffers_used);
 737                 f++;
 738                 f_mod_no=f&(QDIO_MAX_BUFFERS_PER_Q-1);
 739                 QDIO_DBF_TEXT5(0,trace,"outpempt");
 740                 goto check_next;
 741
 742         case SLSB_P_OUTPUT_ERROR:
 743                 QDIO_DBF_TEXT3(0,trace,"outperr");
 744                 sprintf(dbf_text,"%x-%x-%x",f_mod_no,
 745                         q->sbal[f_mod_no]->element[14].sbalf.value,
 746                         q->sbal[f_mod_no]->element[15].sbalf.value);
 747                 QDIO_DBF_TEXT3(1,trace,dbf_text);
 748                 QDIO_DBF_HEX2(1,sbal,q->sbal[f_mod_no],256);
 749
 750                 /* kind of process the buffer */
 751                 set_slsb(q, &f_mod_no, SLSB_P_OUTPUT_NOT_INIT, &count);
 752
 753                 /*
 754                  * we increment the frontier, as this buffer
 755                  * was processed obviously
 756                  */
 757                 atomic_dec(&q->number_of_buffers_used);
 758                 f_mod_no=(f_mod_no+1)&(QDIO_MAX_BUFFERS_PER_Q-1);
 759
 760                 if (q->qdio_error)
 761                         q->error_status_flags|=
 762                                 QDIO_STATUS_MORE_THAN_ONE_QDIO_ERROR;
 763                 q->qdio_error=SLSB_P_OUTPUT_ERROR;
 764                 q->error_status_flags|=QDIO_STATUS_LOOK_FOR_ERROR;
 765
 766                 break;
 767
 768         /* no new buffers */
 769         default:
 770                 QDIO_DBF_TEXT5(0,trace,"outpni");
 771         }
 772 out:
 773         return (q->first_to_check=f_mod_no);
 774 }
 775
 776 /* all buffers are processed */
 777 static inline int
 778 qdio_is_outbound_q_done(struct qdio_q *q)
 779 {
 780         int no_used;
 781 #ifdef CONFIG_QDIO_DEBUG
 782         char dbf_text[15];
 783 #endif
 784
 785         no_used=atomic_read(&q->number_of_buffers_used);
 786
 787 #ifdef CONFIG_QDIO_DEBUG
 788         if (no_used) {
 789                 sprintf(dbf_text,"oqisnt%02x",no_used);
 790                 QDIO_DBF_TEXT4(0,trace,dbf_text);
 791         } else {
 792                 QDIO_DBF_TEXT4(0,trace,"oqisdone");
 793         }
 794         QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
 795 #endif /* CONFIG_QDIO_DEBUG */
 796         return (no_used==0);
 797 }
 798
 799 static inline int
 800 qdio_has_outbound_q_moved(struct qdio_q *q)
 801 {
 802         int i;
 803
 804         i=qdio_get_outbound_buffer_frontier(q);
 805
 806         if ( (i!=GET_SAVED_FRONTIER(q)) ||
 807              (q->error_status_flags&QDIO_STATUS_LOOK_FOR_ERROR) ) {
 808                 SAVE_FRONTIER(q,i);
 809                 QDIO_DBF_TEXT4(0,trace,"oqhasmvd");
 810                 QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
 811                 return 1;
 812         } else {
 813                 QDIO_DBF_TEXT4(0,trace,"oqhsntmv");
 814                 QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
 815                 return 0;
 816         }
 817 }
 818
 819 static inline void
 820 qdio_kick_outbound_q(struct qdio_q *q)
 821 {
 822         int result;
 823 #ifdef CONFIG_QDIO_DEBUG
 824         char dbf_text[15];
 825
 826         QDIO_DBF_TEXT4(0,trace,"kickoutq");
 827         QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
 828 #endif /* CONFIG_QDIO_DEBUG */
 829
 830         if (!q->siga_out)
 831                 return;
 832
 833         /* here's the story with cc=2 and busy bit set (thanks, Rick):
 834          * VM's CP could present us cc=2 and busy bit set on SIGA-write
 835          * during reconfiguration of their Guest LAN (only in HIPERS mode,
 836          * QDIO mode is asynchronous -- cc=2 and busy bit there will take
 837          * the queues down immediately; and not being under VM we have a
 838          * problem on cc=2 and busy bit set right away).
 839          *
 840          * Therefore qdio_siga_output will try for a short time constantly,
 841          * if such a condition occurs. If it doesn't change, it will
 842          * increase the busy_siga_counter and save the timestamp, and
 843          * schedule the queue for later processing (via mark_q, using the
 844          * queue tasklet). __qdio_outbound_processing will check out the
 845          * counter. If non-zero, it will call qdio_kick_outbound_q as often
 846          * as the value of the counter. This will attempt further SIGA
 847          * instructions. For each successful SIGA, the counter is
 848          * decreased, for failing SIGAs the counter remains the same, after
 849          * all.
 850          * After some time of no movement, qdio_kick_outbound_q will
 851          * finally fail and reflect corresponding error codes to call
 852          * the upper layer module and have it take the queues down.
 853          *
 854          * Note that this is a change from the original HiperSockets design
 855          * (saying cc=2 and busy bit means take the queues down), but in
 856          * these days Guest LAN didn't exist... excessive cc=2 with busy bit
 857          * conditions will still take the queues down, but the threshold is
 858          * higher due to the Guest LAN environment.
 859          */
 860
 861
 862         result=qdio_siga_output(q);
 863
 864         switch (result) {
 865         case 0:
 866                 /* went smooth this time, reset timestamp */
 867 #ifdef CONFIG_QDIO_DEBUG
 868                 QDIO_DBF_TEXT3(0,trace,"cc2reslv");
 869                 sprintf(dbf_text,"%4x%2x%2x",q->schid.sch_no,q->q_no,
 870                         atomic_read(&q->busy_siga_counter));
 871                 QDIO_DBF_TEXT3(0,trace,dbf_text);
 872 #endif /* CONFIG_QDIO_DEBUG */
 873                 q->timing.busy_start=0;
 874                 break;
 875         case (2|QDIO_SIGA_ERROR_B_BIT_SET):
 876                 /* cc=2 and busy bit: */
 877                 atomic_inc(&q->busy_siga_counter);
 878
 879                 /* if the last siga was successful, save
 880                  * timestamp here */
 881                 if (!q->timing.busy_start)
 882                         q->timing.busy_start=NOW;
 883
 884                 /* if we're in time, don't touch error_status_flags
 885                  * and siga_error */
 886                 if (NOW-q->timing.busy_start<QDIO_BUSY_BIT_GIVE_UP) {
 887                         qdio_mark_q(q);
 888                         break;
 889                 }
 890                 QDIO_DBF_TEXT2(0,trace,"cc2REPRT");
 891 #ifdef CONFIG_QDIO_DEBUG
 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                 /* else fallthrough and report error */
 897         default:
 898                 /* for plain cc=1, 2 or 3: */
 899                 if (q->siga_error)
 900                         q->error_status_flags|=
 901                                 QDIO_STATUS_MORE_THAN_ONE_SIGA_ERROR;
 902                 q->error_status_flags|=
 903                         QDIO_STATUS_LOOK_FOR_ERROR;
 904                 q->siga_error=result;
 905         }
 906 }
 907
 908 static inline void
 909 qdio_kick_outbound_handler(struct qdio_q *q)
 910 {
 911         int start, end, real_end, count;
 912 #ifdef CONFIG_QDIO_DEBUG
 913         char dbf_text[15];
 914 #endif
 915
 916         start = q->first_element_to_kick;
 917         /* last_move_ftc was just updated */
 918         real_end = GET_SAVED_FRONTIER(q);
 919         end = (real_end+QDIO_MAX_BUFFERS_PER_Q-1)&
 920                 (QDIO_MAX_BUFFERS_PER_Q-1);
 921         count = (end+QDIO_MAX_BUFFERS_PER_Q+1-start)&
 922                 (QDIO_MAX_BUFFERS_PER_Q-1);
 923
 924 #ifdef CONFIG_QDIO_DEBUG
 925         QDIO_DBF_TEXT4(0,trace,"kickouth");
 926         QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
 927
 928         sprintf(dbf_text,"s=%2xc=%2x",start,count);
 929         QDIO_DBF_TEXT4(0,trace,dbf_text);
 930 #endif /* CONFIG_QDIO_DEBUG */
 931
 932         if (q->state==QDIO_IRQ_STATE_ACTIVE)
 933                 q->handler(q->cdev,QDIO_STATUS_OUTBOUND_INT|
 934                            q->error_status_flags,
 935                            q->qdio_error,q->siga_error,q->q_no,start,count,
 936                            q->int_parm);
 937
 938         /* for the next time: */
 939         q->first_element_to_kick=real_end;
 940         q->qdio_error=0;
 941         q->siga_error=0;
 942         q->error_status_flags=0;
 943 }
 944
 945 static inline void
 946 __qdio_outbound_processing(struct qdio_q *q)
 947 {
 948         int siga_attempts;
 949
 950         QDIO_DBF_TEXT4(0,trace,"qoutproc");
 951         QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
 952
 953         if (unlikely(qdio_reserve_q(q))) {
 954                 qdio_release_q(q);
 955 #ifdef QDIO_PERFORMANCE_STATS
 956                 o_p_c++;
 957 #endif /* QDIO_PERFORMANCE_STATS */
 958                 /* as we're sissies, we'll check next time */
 959                 if (likely(!atomic_read(&q->is_in_shutdown))) {
 960                         qdio_mark_q(q);
 961                         QDIO_DBF_TEXT4(0,trace,"busy,agn");
 962                 }
 963                 return;
 964         }
 965 #ifdef QDIO_PERFORMANCE_STATS
 966         o_p_nc++;
 967         perf_stats.tl_runs++;
 968 #endif /* QDIO_PERFORMANCE_STATS */
 969
 970         /* see comment in qdio_kick_outbound_q */
 971         siga_attempts=atomic_read(&q->busy_siga_counter);
 972         while (siga_attempts) {
 973                 atomic_dec(&q->busy_siga_counter);
 974                 qdio_kick_outbound_q(q);
 975                 siga_attempts--;
 976         }
 977
 978         if (qdio_has_outbound_q_moved(q))
 979                 qdio_kick_outbound_handler(q);
 980
 981         if (q->is_iqdio_q) {
 982                 /*
 983                  * for asynchronous queues, we better check, if the fill
 984                  * level is too high. for synchronous queues, the fill
 985                  * level will never be that high.
 986                  */
 987                 if (atomic_read(&q->number_of_buffers_used)>
 988                     IQDIO_FILL_LEVEL_TO_POLL)
 989                         qdio_mark_q(q);
 990
 991         } else if (!q->hydra_gives_outbound_pcis)
 992                 if (!qdio_is_outbound_q_done(q))
 993                         qdio_mark_q(q);
 994
 995         qdio_release_q(q);
 996 }
 997
 998 static void
 999 qdio_outbound_processing(struct qdio_q *q)
1000 {
1001         __qdio_outbound_processing(q);
1002 }
1003
1004 /************************* INBOUND ROUTINES *******************************/
1005
1006
1007 static inline int
1008 qdio_get_inbound_buffer_frontier(struct qdio_q *q)
1009 {
1010         struct qdio_irq *irq;
1011         int f,f_mod_no;
1012         volatile char *slsb;
1013         unsigned int count = 1;
1014         int first_not_to_check;
1015 #ifdef CONFIG_QDIO_DEBUG
1016         char dbf_text[15];
1017 #endif /* CONFIG_QDIO_DEBUG */
1018 #ifdef QDIO_USE_PROCESSING_STATE
1019         int last_position=-1;
1020 #endif /* QDIO_USE_PROCESSING_STATE */
1021
1022         QDIO_DBF_TEXT4(0,trace,"getibfro");
1023         QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
1024
1025         irq = (struct qdio_irq *) q->irq_ptr;
1026         if (irq->is_qebsm)
1027                 return qdio_qebsm_get_inbound_buffer_frontier(q);
1028
1029         slsb=&q->slsb.acc.val[0];
1030         f_mod_no=f=q->first_to_check;
1031         /*
1032          * we don't check 128 buffers, as otherwise qdio_has_inbound_q_moved
1033          * would return 0
1034          */
1035         first_not_to_check=f+qdio_min(atomic_read(&q->number_of_buffers_used),
1036                                       (QDIO_MAX_BUFFERS_PER_Q-1));
1037
1038         /*
1039          * we don't use this one, as a PCI or we after a thin interrupt
1040          * will sync the queues
1041          */
1042         /* SYNC_MEMORY;*/
1043
1044 check_next:
1045         f_mod_no=f&(QDIO_MAX_BUFFERS_PER_Q-1);
1046         if (f==first_not_to_check)
1047                 goto out;
1048         switch (slsb[f_mod_no]) {
1049
1050         /* CU_EMPTY means frontier is reached */
1051         case SLSB_CU_INPUT_EMPTY:
1052                 QDIO_DBF_TEXT5(0,trace,"inptempt");
1053                 break;
1054
1055         /* P_PRIMED means set slsb to P_PROCESSING and move on */
1056         case SLSB_P_INPUT_PRIMED:
1057                 QDIO_DBF_TEXT5(0,trace,"inptprim");
1058
1059 #ifdef QDIO_USE_PROCESSING_STATE
1060                 /*
1061                  * as soon as running under VM, polling the input queues will
1062                  * kill VM in terms of CP overhead
1063                  */
1064                 if (q->siga_sync) {
1065                         set_slsb(q, &f_mod_no, SLSB_P_INPUT_NOT_INIT, &count);
1066                 } else {
1067                         /* set the previous buffer to NOT_INIT. The current
1068                          * buffer will be set to PROCESSING at the end of
1069                          * this function to avoid further interrupts. */
1070                         if (last_position>=0)
1071                                 set_slsb(q, &last_position,
1072                                          SLSB_P_INPUT_NOT_INIT, &count);
1073                         atomic_set(&q->polling,1);
1074                         last_position=f_mod_no;
1075                 }
1076 #else /* QDIO_USE_PROCESSING_STATE */
1077                 set_slsb(q, &f_mod_no, SLSB_P_INPUT_NOT_INIT, &count);
1078 #endif /* QDIO_USE_PROCESSING_STATE */
1079                 /*
1080                  * not needed, as the inbound queue will be synced on the next
1081                  * siga-r, resp. tiqdio_is_inbound_q_done will do the siga-s
1082                  */
1083                 /*SYNC_MEMORY;*/
1084                 f++;
1085                 atomic_dec(&q->number_of_buffers_used);
1086                 goto check_next;
1087
1088         case SLSB_P_INPUT_NOT_INIT:
1089         case SLSB_P_INPUT_PROCESSING:
1090                 QDIO_DBF_TEXT5(0,trace,"inpnipro");
1091                 break;
1092
1093         /* P_ERROR means frontier is reached, break and report error */
1094         case SLSB_P_INPUT_ERROR:
1095 #ifdef CONFIG_QDIO_DEBUG
1096                 sprintf(dbf_text,"inperr%2x",f_mod_no);
1097                 QDIO_DBF_TEXT3(1,trace,dbf_text);
1098 #endif /* CONFIG_QDIO_DEBUG */
1099                 QDIO_DBF_HEX2(1,sbal,q->sbal[f_mod_no],256);
1100
1101                 /* kind of process the buffer */
1102                 set_slsb(q, &f_mod_no, SLSB_P_INPUT_NOT_INIT, &count);
1103
1104                 if (q->qdio_error)
1105                         q->error_status_flags|=
1106                                 QDIO_STATUS_MORE_THAN_ONE_QDIO_ERROR;
1107                 q->qdio_error=SLSB_P_INPUT_ERROR;
1108                 q->error_status_flags|=QDIO_STATUS_LOOK_FOR_ERROR;
1109
1110                 /* we increment the frontier, as this buffer
1111                  * was processed obviously */
1112                 f_mod_no=(f_mod_no+1)&(QDIO_MAX_BUFFERS_PER_Q-1);
1113                 atomic_dec(&q->number_of_buffers_used);
1114
1115 #ifdef QDIO_USE_PROCESSING_STATE
1116                 last_position=-1;
1117 #endif /* QDIO_USE_PROCESSING_STATE */
1118
1119                 break;
1120
1121         /* everything else means frontier not changed (HALTED or so) */
1122         default:
1123                 break;
1124         }
1125 out:
1126         q->first_to_check=f_mod_no;
1127
1128 #ifdef QDIO_USE_PROCESSING_STATE
1129         if (last_position>=0)
1130                 set_slsb(q, &last_position, SLSB_P_INPUT_NOT_INIT, &count);
1131 #endif /* QDIO_USE_PROCESSING_STATE */
1132
1133         QDIO_DBF_HEX4(0,trace,&q->first_to_check,sizeof(int));
1134
1135         return q->first_to_check;
1136 }
1137
1138 static inline int
1139 qdio_has_inbound_q_moved(struct qdio_q *q)
1140 {
1141         int i;
1142
1143 #ifdef QDIO_PERFORMANCE_STATS
1144         static int old_pcis=0;
1145         static int old_thinints=0;
1146
1147         if ((old_pcis==perf_stats.pcis)&&(old_thinints==perf_stats.thinints))
1148                 perf_stats.start_time_inbound=NOW;
1149         else
1150                 old_pcis=perf_stats.pcis;
1151 #endif /* QDIO_PERFORMANCE_STATS */
1152
1153         i=qdio_get_inbound_buffer_frontier(q);
1154         if ( (i!=GET_SAVED_FRONTIER(q)) ||
1155              (q->error_status_flags&QDIO_STATUS_LOOK_FOR_ERROR) ) {
1156                 SAVE_FRONTIER(q,i);
1157                 if ((!q->siga_sync)&&(!q->hydra_gives_outbound_pcis))
1158                         SAVE_TIMESTAMP(q);
1159
1160                 QDIO_DBF_TEXT4(0,trace,"inhasmvd");
1161                 QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
1162                 return 1;
1163         } else {
1164                 QDIO_DBF_TEXT4(0,trace,"inhsntmv");
1165                 QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
1166                 return 0;
1167         }
1168 }
1169
1170 /* means, no more buffers to be filled */
1171 static inline int
1172 tiqdio_is_inbound_q_done(struct qdio_q *q)
1173 {
1174         int no_used;
1175         unsigned int start_buf, count;
1176         unsigned char state = 0;
1177         struct qdio_irq *irq = (struct qdio_irq *) q->irq_ptr;
1178
1179 #ifdef CONFIG_QDIO_DEBUG
1180         char dbf_text[15];
1181 #endif
1182
1183         no_used=atomic_read(&q->number_of_buffers_used);
1184
1185         /* propagate the change from 82 to 80 through VM */
1186         SYNC_MEMORY;
1187
1188 #ifdef CONFIG_QDIO_DEBUG
1189         if (no_used) {
1190                 sprintf(dbf_text,"iqisnt%02x",no_used);
1191                 QDIO_DBF_TEXT4(0,trace,dbf_text);
1192         } else {
1193                 QDIO_DBF_TEXT4(0,trace,"iniqisdo");
1194         }
1195         QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
1196 #endif /* CONFIG_QDIO_DEBUG */
1197
1198         if (!no_used)
1199                 return 1;
1200         if (!q->siga_sync && !irq->is_qebsm)
1201                 /* we'll check for more primed buffers in qeth_stop_polling */
1202                 return 0;
1203         if (irq->is_qebsm) {
1204                 count = 1;
1205                 start_buf = q->first_to_check;
1206                 qdio_do_eqbs(q, &state, &start_buf, &count);
1207         } else
1208                 state = q->slsb.acc.val[q->first_to_check];
1209         if (state != SLSB_P_INPUT_PRIMED)
1210                 /*
1211                  * nothing more to do, if next buffer is not PRIMED.
1212                  * note that we did a SYNC_MEMORY before, that there
1213                  * has been a sychnronization.
1214                  * we will return 0 below, as there is nothing to do
1215                  * (stop_polling not necessary, as we have not been
1216                  * using the PROCESSING state
1217                  */
1218                 return 0;
1219
1220         /*
1221          * ok, the next input buffer is primed. that means, that device state
1222          * change indicator and adapter local summary are set, so we will find
1223          * it next time.
1224          * we will return 0 below, as there is nothing to do, except scheduling
1225          * ourselves for the next time.
1226          */
1227         tiqdio_set_summary_bit((__u32*)q->dev_st_chg_ind);
1228         tiqdio_sched_tl();
1229         return 0;
1230 }
1231
1232 static inline int
1233 qdio_is_inbound_q_done(struct qdio_q *q)
1234 {
1235         int no_used;
1236         unsigned int start_buf, count;
1237         unsigned char state = 0;
1238         struct qdio_irq *irq = (struct qdio_irq *) q->irq_ptr;
1239
1240 #ifdef CONFIG_QDIO_DEBUG
1241         char dbf_text[15];
1242 #endif
1243
1244         no_used=atomic_read(&q->number_of_buffers_used);
1245
1246         /*
1247          * we need that one for synchronization with the adapter, as it
1248          * does a kind of PCI avoidance
1249          */
1250         SYNC_MEMORY;
1251
1252         if (!no_used) {
1253                 QDIO_DBF_TEXT4(0,trace,"inqisdnA");
1254                 QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
1255                 QDIO_DBF_TEXT4(0,trace,dbf_text);
1256                 return 1;
1257         }
1258         if (irq->is_qebsm) {
1259                 count = 1;
1260                 start_buf = q->first_to_check;
1261                 qdio_do_eqbs(q, &state, &start_buf, &count);
1262         } else
1263                 state = q->slsb.acc.val[q->first_to_check];
1264         if (state == SLSB_P_INPUT_PRIMED) {
1265                 /* we got something to do */
1266                 QDIO_DBF_TEXT4(0,trace,"inqisntA");
1267                 QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
1268                 return 0;
1269         }
1270
1271         /* on VM, we don't poll, so the q is always done here */
1272         if (q->siga_sync)
1273                 return 1;
1274         if (q->hydra_gives_outbound_pcis)
1275                 return 1;
1276
1277         /*
1278          * at this point we know, that inbound first_to_check
1279          * has (probably) not moved (see qdio_inbound_processing)
1280          */
1281         if (NOW>GET_SAVED_TIMESTAMP(q)+q->timing.threshold) {
1282 #ifdef CONFIG_QDIO_DEBUG
1283                 QDIO_DBF_TEXT4(0,trace,"inqisdon");
1284                 QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
1285                 sprintf(dbf_text,"pf%02xcn%02x",q->first_to_check,no_used);
1286                 QDIO_DBF_TEXT4(0,trace,dbf_text);
1287 #endif /* CONFIG_QDIO_DEBUG */
1288                 return 1;
1289         } else {
1290 #ifdef CONFIG_QDIO_DEBUG
1291                 QDIO_DBF_TEXT4(0,trace,"inqisntd");
1292                 QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
1293                 sprintf(dbf_text,"pf%02xcn%02x",q->first_to_check,no_used);
1294                 QDIO_DBF_TEXT4(0,trace,dbf_text);
1295 #endif /* CONFIG_QDIO_DEBUG */
1296                 return 0;
1297         }
1298 }
1299
1300 static inline void
1301 qdio_kick_inbound_handler(struct qdio_q *q)
1302 {
1303         int count, start, end, real_end, i;
1304 #ifdef CONFIG_QDIO_DEBUG
1305         char dbf_text[15];
1306 #endif
1307
1308         QDIO_DBF_TEXT4(0,trace,"kickinh");
1309         QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
1310
1311         start=q->first_element_to_kick;
1312         real_end=q->first_to_check;
1313         end=(real_end+QDIO_MAX_BUFFERS_PER_Q-1)&(QDIO_MAX_BUFFERS_PER_Q-1);
1314
1315         i=start;
1316         count=0;
1317         while (1) {
1318                 count++;
1319                 if (i==end)
1320                         break;
1321                 i=(i+1)&(QDIO_MAX_BUFFERS_PER_Q-1);
1322         }
1323
1324 #ifdef CONFIG_QDIO_DEBUG
1325         sprintf(dbf_text,"s=%2xc=%2x",start,count);
1326         QDIO_DBF_TEXT4(0,trace,dbf_text);
1327 #endif /* CONFIG_QDIO_DEBUG */
1328
1329         if (likely(q->state==QDIO_IRQ_STATE_ACTIVE))
1330                 q->handler(q->cdev,
1331                            QDIO_STATUS_INBOUND_INT|q->error_status_flags,
1332                            q->qdio_error,q->siga_error,q->q_no,start,count,
1333                            q->int_parm);
1334
1335         /* for the next time: */
1336         q->first_element_to_kick=real_end;
1337         q->qdio_error=0;
1338         q->siga_error=0;
1339         q->error_status_flags=0;
1340
1341 #ifdef QDIO_PERFORMANCE_STATS
1342         perf_stats.inbound_time+=NOW-perf_stats.start_time_inbound;
1343         perf_stats.inbound_cnt++;
1344 #endif /* QDIO_PERFORMANCE_STATS */
1345 }
1346
1347 static inline void
1348 __tiqdio_inbound_processing(struct qdio_q *q, int spare_ind_was_set)
1349 {
1350         struct qdio_irq *irq_ptr;
1351         struct qdio_q *oq;
1352         int i;
1353
1354         QDIO_DBF_TEXT4(0,trace,"iqinproc");
1355         QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
1356
1357         /*
1358          * we first want to reserve the q, so that we know, that we don't
1359          * interrupt ourselves and call qdio_unmark_q, as is_in_shutdown might
1360          * be set
1361          */
1362         if (unlikely(qdio_reserve_q(q))) {
1363                 qdio_release_q(q);
1364 #ifdef QDIO_PERFORMANCE_STATS
1365                 ii_p_c++;
1366 #endif /* QDIO_PERFORMANCE_STATS */
1367                 /*
1368                  * as we might just be about to stop polling, we make
1369                  * sure that we check again at least once more
1370                  */
1371                 tiqdio_sched_tl();
1372                 return;
1373         }
1374 #ifdef QDIO_PERFORMANCE_STATS
1375         ii_p_nc++;
1376 #endif /* QDIO_PERFORMANCE_STATS */
1377         if (unlikely(atomic_read(&q->is_in_shutdown))) {
1378                 qdio_unmark_q(q);
1379                 goto out;
1380         }
1381
1382         /*
1383          * we reset spare_ind_was_set, when the queue does not use the
1384          * spare indicator
1385          */
1386         if (spare_ind_was_set)
1387                 spare_ind_was_set = (q->dev_st_chg_ind == &spare_indicator);
1388
1389         if (!(*(q->dev_st_chg_ind)) && !spare_ind_was_set)
1390                 goto out;
1391         /*
1392          * q->dev_st_chg_ind is the indicator, be it shared or not.
1393          * only clear it, if indicator is non-shared
1394          */
1395         if (!spare_ind_was_set)
1396                 tiqdio_clear_summary_bit((__u32*)q->dev_st_chg_ind);
1397
1398         if (q->hydra_gives_outbound_pcis) {
1399                 if (!q->siga_sync_done_on_thinints) {
1400                         SYNC_MEMORY_ALL;
1401                 } else if ((!q->siga_sync_done_on_outb_tis)&&
1402                          (q->hydra_gives_outbound_pcis)) {
1403                         SYNC_MEMORY_ALL_OUTB;
1404                 }
1405         } else {
1406                 SYNC_MEMORY;
1407         }
1408         /*
1409          * maybe we have to do work on our outbound queues... at least
1410          * we have to check the outbound-int-capable thinint-capable
1411          * queues
1412          */
1413         if (q->hydra_gives_outbound_pcis) {
1414                 irq_ptr = (struct qdio_irq*)q->irq_ptr;
1415                 for (i=0;i<irq_ptr->no_output_qs;i++) {
1416                         oq = irq_ptr->output_qs[i];
1417 #ifdef QDIO_PERFORMANCE_STATS
1418                         perf_stats.tl_runs--;
1419 #endif /* QDIO_PERFORMANCE_STATS */
1420                         if (!qdio_is_outbound_q_done(oq))
1421                                 __qdio_outbound_processing(oq);
1422                 }
1423         }
1424
1425         if (!qdio_has_inbound_q_moved(q))
1426                 goto out;
1427
1428         qdio_kick_inbound_handler(q);
1429         if (tiqdio_is_inbound_q_done(q))
1430                 if (!qdio_stop_polling(q)) {
1431                         /*
1432                          * we set the flags to get into the stuff next time,
1433                          * see also comment in qdio_stop_polling
1434                          */
1435                         tiqdio_set_summary_bit((__u32*)q->dev_st_chg_ind);
1436                         tiqdio_sched_tl();
1437                 }
1438 out:
1439         qdio_release_q(q);
1440 }
1441
1442 static void
1443 tiqdio_inbound_processing(struct qdio_q *q)
1444 {
1445         __tiqdio_inbound_processing(q, atomic_read(&spare_indicator_usecount));
1446 }
1447
1448 static inline void
1449 __qdio_inbound_processing(struct qdio_q *q)
1450 {
1451         int q_laps=0;
1452
1453         QDIO_DBF_TEXT4(0,trace,"qinproc");
1454         QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
1455
1456         if (unlikely(qdio_reserve_q(q))) {
1457                 qdio_release_q(q);
1458 #ifdef QDIO_PERFORMANCE_STATS
1459                 i_p_c++;
1460 #endif /* QDIO_PERFORMANCE_STATS */
1461                 /* as we're sissies, we'll check next time */
1462                 if (likely(!atomic_read(&q->is_in_shutdown))) {
1463                         qdio_mark_q(q);
1464                         QDIO_DBF_TEXT4(0,trace,"busy,agn");
1465                 }
1466                 return;
1467         }
1468 #ifdef QDIO_PERFORMANCE_STATS
1469         i_p_nc++;
1470         perf_stats.tl_runs++;
1471 #endif /* QDIO_PERFORMANCE_STATS */
1472
1473 again:
1474         if (qdio_has_inbound_q_moved(q)) {
1475                 qdio_kick_inbound_handler(q);
1476                 if (!qdio_stop_polling(q)) {
1477                         q_laps++;
1478                         if (q_laps<QDIO_Q_LAPS)
1479                                 goto again;
1480                 }
1481                 qdio_mark_q(q);
1482         } else {
1483                 if (!qdio_is_inbound_q_done(q))
1484                         /* means poll time is not yet over */
1485                         qdio_mark_q(q);
1486         }
1487
1488         qdio_release_q(q);
1489 }
1490
1491 static void
1492 qdio_inbound_processing(struct qdio_q *q)
1493 {
1494         __qdio_inbound_processing(q);
1495 }
1496
1497 /************************* MAIN ROUTINES *******************************/
1498
1499 #ifdef QDIO_USE_PROCESSING_STATE
1500 static inline int
1501 tiqdio_reset_processing_state(struct qdio_q *q, int q_laps)
1502 {
1503         if (!q) {
1504                 tiqdio_sched_tl();
1505                 return 0;
1506         }
1507
1508         /*
1509          * under VM, we have not used the PROCESSING state, so no
1510          * need to stop polling
1511          */
1512         if (q->siga_sync)
1513                 return 2;
1514
1515         if (unlikely(qdio_reserve_q(q))) {
1516                 qdio_release_q(q);
1517 #ifdef QDIO_PERFORMANCE_STATS
1518                 ii_p_c++;
1519 #endif /* QDIO_PERFORMANCE_STATS */
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 inline 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 #ifdef QDIO_PERFORMANCE_STATS
1611         perf_stats.tl_runs++;
1612 #endif /* QDIO_PERFORMANCE_STATS */
1613
1614         tiqdio_inbound_checks();
1615 }
1616
1617 /********************* GENERAL HELPER_ROUTINES ***********************/
1618
1619 static void
1620 qdio_release_irq_memory(struct qdio_irq *irq_ptr)
1621 {
1622         int i;
1623
1624         for (i=0;i<QDIO_MAX_QUEUES_PER_IRQ;i++) {
1625                 if (!irq_ptr->input_qs[i])
1626                         goto next;
1627
1628                 kfree(irq_ptr->input_qs[i]->slib);
1629                 kfree(irq_ptr->input_qs[i]);
1630
1631 next:
1632                 if (!irq_ptr->output_qs[i])
1633                         continue;
1634
1635                 kfree(irq_ptr->output_qs[i]->slib);
1636                 kfree(irq_ptr->output_qs[i]);
1637
1638         }
1639         kfree(irq_ptr->qdr);
1640         kfree(irq_ptr);
1641 }
1642
1643 static void
1644 qdio_set_impl_params(struct qdio_irq *irq_ptr,
1645                      unsigned int qib_param_field_format,
1646                      /* pointer to 128 bytes or NULL, if no param field */
1647                      unsigned char *qib_param_field,
1648                      /* pointer to no_queues*128 words of data or NULL */
1649                      unsigned int no_input_qs,
1650                      unsigned int no_output_qs,
1651                      unsigned long *input_slib_elements,
1652                      unsigned long *output_slib_elements)
1653 {
1654         int i,j;
1655
1656         if (!irq_ptr)
1657                 return;
1658
1659         irq_ptr->qib.pfmt=qib_param_field_format;
1660         if (qib_param_field)
1661                 memcpy(irq_ptr->qib.parm,qib_param_field,
1662                        QDIO_MAX_BUFFERS_PER_Q);
1663
1664         if (input_slib_elements)
1665                 for (i=0;i<no_input_qs;i++) {
1666                         for (j=0;j<QDIO_MAX_BUFFERS_PER_Q;j++)
1667                                 irq_ptr->input_qs[i]->slib->slibe[j].parms=
1668                                         input_slib_elements[
1669                                                 i*QDIO_MAX_BUFFERS_PER_Q+j];
1670                 }
1671         if (output_slib_elements)
1672                 for (i=0;i<no_output_qs;i++) {
1673                         for (j=0;j<QDIO_MAX_BUFFERS_PER_Q;j++)
1674                                 irq_ptr->output_qs[i]->slib->slibe[j].parms=
1675                                         output_slib_elements[
1676                                                 i*QDIO_MAX_BUFFERS_PER_Q+j];
1677                 }
1678 }
1679
1680 static int
1681 qdio_alloc_qs(struct qdio_irq *irq_ptr,
1682               int no_input_qs, int no_output_qs)
1683 {
1684         int i;
1685         struct qdio_q *q;
1686         int result=-ENOMEM;
1687
1688         for (i=0;i<no_input_qs;i++) {
1689                 q=kmalloc(sizeof(struct qdio_q),GFP_KERNEL);
1690
1691                 if (!q) {
1692                         QDIO_PRINT_ERR("kmalloc of q failed!\n");
1693                         goto out;
1694                 }
1695
1696                 memset(q,0,sizeof(struct qdio_q));
1697
1698                 q->slib=kmalloc(PAGE_SIZE,GFP_KERNEL);
1699                 if (!q->slib) {
1700                         QDIO_PRINT_ERR("kmalloc of slib failed!\n");
1701                         goto out;
1702                 }
1703
1704                 irq_ptr->input_qs[i]=q;
1705         }
1706
1707         for (i=0;i<no_output_qs;i++) {
1708                 q=kmalloc(sizeof(struct qdio_q),GFP_KERNEL);
1709
1710                 if (!q) {
1711                         goto out;
1712                 }
1713
1714                 memset(q,0,sizeof(struct qdio_q));
1715
1716                 q->slib=kmalloc(PAGE_SIZE,GFP_KERNEL);
1717                 if (!q->slib) {
1718                         QDIO_PRINT_ERR("kmalloc of slib failed!\n");
1719                         goto out;
1720                 }
1721
1722                 irq_ptr->output_qs[i]=q;
1723         }
1724
1725         result=0;
1726 out:
1727         return result;
1728 }
1729
1730 static void
1731 qdio_fill_qs(struct qdio_irq *irq_ptr, struct ccw_device *cdev,
1732              int no_input_qs, int no_output_qs,
1733              qdio_handler_t *input_handler,
1734              qdio_handler_t *output_handler,
1735              unsigned long int_parm,int q_format,
1736              unsigned long flags,
1737              void **inbound_sbals_array,
1738              void **outbound_sbals_array)
1739 {
1740         struct qdio_q *q;
1741         int i,j;
1742         char dbf_text[20]; /* see qdio_initialize */
1743         void *ptr;
1744         int available;
1745
1746         sprintf(dbf_text,"qfqs%4x",cdev->private->sch_no);
1747         QDIO_DBF_TEXT0(0,setup,dbf_text);
1748         for (i=0;i<no_input_qs;i++) {
1749                 q=irq_ptr->input_qs[i];
1750
1751                 memset(q,0,((char*)&q->slib)-((char*)q));
1752                 sprintf(dbf_text,"in-q%4x",i);
1753                 QDIO_DBF_TEXT0(0,setup,dbf_text);
1754                 QDIO_DBF_HEX0(0,setup,&q,sizeof(void*));
1755
1756                 memset(q->slib,0,PAGE_SIZE);
1757                 q->sl=(struct sl*)(((char*)q->slib)+PAGE_SIZE/2);
1758
1759                 available=0;
1760
1761                 for (j=0;j<QDIO_MAX_BUFFERS_PER_Q;j++)
1762                         q->sbal[j]=*(inbound_sbals_array++);
1763
1764                 q->queue_type=q_format;
1765                 q->int_parm=int_parm;
1766                 q->schid = irq_ptr->schid;
1767                 q->irq_ptr = irq_ptr;
1768                 q->cdev = cdev;
1769                 q->mask=1<<(31-i);
1770                 q->q_no=i;
1771                 q->is_input_q=1;
1772                 q->first_to_check=0;
1773                 q->last_move_ftc=0;
1774                 q->handler=input_handler;
1775                 q->dev_st_chg_ind=irq_ptr->dev_st_chg_ind;
1776
1777                 q->tasklet.data=(unsigned long)q;
1778                 /* q->is_thinint_q isn't valid at this time, but
1779                  * irq_ptr->is_thinint_irq is */
1780                 q->tasklet.func=(void(*)(unsigned long))
1781                         ((irq_ptr->is_thinint_irq)?&tiqdio_inbound_processing:
1782                          &qdio_inbound_processing);
1783
1784                 /* actually this is not used for inbound queues. yet. */
1785                 atomic_set(&q->busy_siga_counter,0);
1786                 q->timing.busy_start=0;
1787
1788 /*              for (j=0;j<QDIO_STATS_NUMBER;j++)
1789                         q->timing.last_transfer_times[j]=(qdio_get_micros()/
1790                                                           QDIO_STATS_NUMBER)*j;
1791                 q->timing.last_transfer_index=QDIO_STATS_NUMBER-1;
1792 */
1793
1794                 /* fill in slib */
1795                 if (i>0) irq_ptr->input_qs[i-1]->slib->nsliba=
1796                                  (unsigned long)(q->slib);
1797                 q->slib->sla=(unsigned long)(q->sl);
1798                 q->slib->slsba=(unsigned long)(&q->slsb.acc.val[0]);
1799
1800                 /* fill in sl */
1801                 for (j=0;j<QDIO_MAX_BUFFERS_PER_Q;j++)
1802                         q->sl->element[j].sbal=(unsigned long)(q->sbal[j]);
1803
1804                 QDIO_DBF_TEXT2(0,setup,"sl-sb-b0");
1805                 ptr=(void*)q->sl;
1806                 QDIO_DBF_HEX2(0,setup,&ptr,sizeof(void*));
1807                 ptr=(void*)&q->slsb;
1808                 QDIO_DBF_HEX2(0,setup,&ptr,sizeof(void*));
1809                 ptr=(void*)q->sbal[0];
1810                 QDIO_DBF_HEX2(0,setup,&ptr,sizeof(void*));
1811
1812                 /* fill in slsb */
1813                 if (!irq_ptr->is_qebsm) {
1814                         unsigned int count = 1;
1815                         for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; j++)
1816                                 set_slsb(q, &j, SLSB_P_INPUT_NOT_INIT, &count);
1817                 }
1818         }
1819
1820         for (i=0;i<no_output_qs;i++) {
1821                 q=irq_ptr->output_qs[i];
1822                 memset(q,0,((char*)&q->slib)-((char*)q));
1823
1824                 sprintf(dbf_text,"outq%4x",i);
1825                 QDIO_DBF_TEXT0(0,setup,dbf_text);
1826                 QDIO_DBF_HEX0(0,setup,&q,sizeof(void*));
1827
1828                 memset(q->slib,0,PAGE_SIZE);
1829                 q->sl=(struct sl*)(((char*)q->slib)+PAGE_SIZE/2);
1830
1831                 available=0;
1832
1833                 for (j=0;j<QDIO_MAX_BUFFERS_PER_Q;j++)
1834                         q->sbal[j]=*(outbound_sbals_array++);
1835
1836                 q->queue_type=q_format;
1837                 q->int_parm=int_parm;
1838                 q->is_input_q=0;
1839                 q->schid = irq_ptr->schid;
1840                 q->cdev = cdev;
1841                 q->irq_ptr = irq_ptr;
1842                 q->mask=1<<(31-i);
1843                 q->q_no=i;
1844                 q->first_to_check=0;
1845                 q->last_move_ftc=0;
1846                 q->handler=output_handler;
1847
1848                 q->tasklet.data=(unsigned long)q;
1849                 q->tasklet.func=(void(*)(unsigned long))
1850                         &qdio_outbound_processing;
1851
1852                 atomic_set(&q->busy_siga_counter,0);
1853                 q->timing.busy_start=0;
1854
1855                 /* fill in slib */
1856                 if (i>0) irq_ptr->output_qs[i-1]->slib->nsliba=
1857                                  (unsigned long)(q->slib);
1858                 q->slib->sla=(unsigned long)(q->sl);
1859                 q->slib->slsba=(unsigned long)(&q->slsb.acc.val[0]);
1860
1861                 /* fill in sl */
1862                 for (j=0;j<QDIO_MAX_BUFFERS_PER_Q;j++)
1863                         q->sl->element[j].sbal=(unsigned long)(q->sbal[j]);
1864
1865                 QDIO_DBF_TEXT2(0,setup,"sl-sb-b0");
1866                 ptr=(void*)q->sl;
1867                 QDIO_DBF_HEX2(0,setup,&ptr,sizeof(void*));
1868                 ptr=(void*)&q->slsb;
1869                 QDIO_DBF_HEX2(0,setup,&ptr,sizeof(void*));
1870                 ptr=(void*)q->sbal[0];
1871                 QDIO_DBF_HEX2(0,setup,&ptr,sizeof(void*));
1872
1873                 /* fill in slsb */
1874                 if (!irq_ptr->is_qebsm) {
1875                         unsigned int count = 1;
1876                         for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; j++)
1877                                 set_slsb(q, &j, SLSB_P_OUTPUT_NOT_INIT, &count);
1878                 }
1879         }
1880 }
1881
1882 static void
1883 qdio_fill_thresholds(struct qdio_irq *irq_ptr,
1884                      unsigned int no_input_qs,
1885                      unsigned int no_output_qs,
1886                      unsigned int min_input_threshold,
1887                      unsigned int max_input_threshold,
1888                      unsigned int min_output_threshold,
1889                      unsigned int max_output_threshold)
1890 {
1891         int i;
1892         struct qdio_q *q;
1893
1894         for (i=0;i<no_input_qs;i++) {
1895                 q=irq_ptr->input_qs[i];
1896                 q->timing.threshold=max_input_threshold;
1897 /*              for (j=0;j<QDIO_STATS_CLASSES;j++) {
1898                         q->threshold_classes[j].threshold=
1899                                 min_input_threshold+
1900                                 (max_input_threshold-min_input_threshold)/
1901                                 QDIO_STATS_CLASSES;
1902                 }
1903                 qdio_use_thresholds(q,QDIO_STATS_CLASSES/2);*/
1904         }
1905         for (i=0;i<no_output_qs;i++) {
1906                 q=irq_ptr->output_qs[i];
1907                 q->timing.threshold=max_output_threshold;
1908 /*              for (j=0;j<QDIO_STATS_CLASSES;j++) {
1909                         q->threshold_classes[j].threshold=
1910                                 min_output_threshold+
1911                                 (max_output_threshold-min_output_threshold)/
1912                                 QDIO_STATS_CLASSES;
1913                 }
1914                 qdio_use_thresholds(q,QDIO_STATS_CLASSES/2);*/
1915         }
1916 }
1917
1918 static int
1919 tiqdio_thinint_handler(void)
1920 {
1921         QDIO_DBF_TEXT4(0,trace,"thin_int");
1922
1923 #ifdef QDIO_PERFORMANCE_STATS
1924         perf_stats.thinints++;
1925         perf_stats.start_time_inbound=NOW;
1926 #endif /* QDIO_PERFORMANCE_STATS */
1927
1928         /* SVS only when needed:
1929          * issue SVS to benefit from iqdio interrupt avoidance
1930          * (SVS clears AISOI)*/
1931         if (!omit_svs)
1932                 tiqdio_clear_global_summary();
1933
1934         tiqdio_inbound_checks();
1935         return 0;
1936 }
1937
1938 static void
1939 qdio_set_state(struct qdio_irq *irq_ptr, enum qdio_irq_states state)
1940 {
1941         int i;
1942 #ifdef CONFIG_QDIO_DEBUG
1943         char dbf_text[15];
1944
1945         QDIO_DBF_TEXT5(0,trace,"newstate");
1946         sprintf(dbf_text,"%4x%4x",irq_ptr->schid.sch_no,state);
1947         QDIO_DBF_TEXT5(0,trace,dbf_text);
1948 #endif /* CONFIG_QDIO_DEBUG */
1949
1950         irq_ptr->state=state;
1951         for (i=0;i<irq_ptr->no_input_qs;i++)
1952                 irq_ptr->input_qs[i]->state=state;
1953         for (i=0;i<irq_ptr->no_output_qs;i++)
1954                 irq_ptr->output_qs[i]->state=state;
1955         mb();
1956 }
1957
1958 static inline void
1959 qdio_irq_check_sense(struct subchannel_id schid, struct irb *irb)
1960 {
1961         char dbf_text[15];
1962
1963         if (irb->esw.esw0.erw.cons) {
1964                 sprintf(dbf_text,"sens%4x",schid.sch_no);
1965                 QDIO_DBF_TEXT2(1,trace,dbf_text);
1966                 QDIO_DBF_HEX0(0,sense,irb,QDIO_DBF_SENSE_LEN);
1967
1968                 QDIO_PRINT_WARN("sense data available on qdio channel.\n");
1969                 HEXDUMP16(WARN,"irb: ",irb);
1970                 HEXDUMP16(WARN,"sense data: ",irb->ecw);
1971         }
1972
1973 }
1974
1975 static inline void
1976 qdio_handle_pci(struct qdio_irq *irq_ptr)
1977 {
1978         int i;
1979         struct qdio_q *q;
1980
1981 #ifdef QDIO_PERFORMANCE_STATS
1982         perf_stats.pcis++;
1983         perf_stats.start_time_inbound=NOW;
1984 #endif /* QDIO_PERFORMANCE_STATS */
1985         for (i=0;i<irq_ptr->no_input_qs;i++) {
1986                 q=irq_ptr->input_qs[i];
1987                 if (q->is_input_q&QDIO_FLAG_NO_INPUT_INTERRUPT_CONTEXT)
1988                         qdio_mark_q(q);
1989                 else {
1990 #ifdef QDIO_PERFORMANCE_STATS
1991                         perf_stats.tl_runs--;
1992 #endif /* QDIO_PERFORMANCE_STATS */
1993                         __qdio_inbound_processing(q);
1994                 }
1995         }
1996         if (!irq_ptr->hydra_gives_outbound_pcis)
1997                 return;
1998         for (i=0;i<irq_ptr->no_output_qs;i++) {
1999                 q=irq_ptr->output_qs[i];
2000 #ifdef QDIO_PERFORMANCE_STATS
2001                 perf_stats.tl_runs--;
2002 #endif /* QDIO_PERFORMANCE_STATS */
2003                 if (qdio_is_outbound_q_done(q))
2004                         continue;
2005                 if (!irq_ptr->sync_done_on_outb_pcis)
2006                         SYNC_MEMORY;
2007                 __qdio_outbound_processing(q);
2008         }
2009 }
2010
2011 static void qdio_establish_handle_irq(struct ccw_device*, int, int);
2012
2013 static inline void
2014 qdio_handle_activate_check(struct ccw_device *cdev, unsigned long intparm,
2015                            int cstat, int dstat)
2016 {
2017         struct qdio_irq *irq_ptr;
2018         struct qdio_q *q;
2019         char dbf_text[15];
2020
2021         irq_ptr = cdev->private->qdio_data;
2022
2023         QDIO_DBF_TEXT2(1, trace, "ick2");
2024         sprintf(dbf_text,"%s", cdev->dev.bus_id);
2025         QDIO_DBF_TEXT2(1,trace,dbf_text);
2026         QDIO_DBF_HEX2(0,trace,&intparm,sizeof(int));
2027         QDIO_DBF_HEX2(0,trace,&dstat,sizeof(int));
2028         QDIO_DBF_HEX2(0,trace,&cstat,sizeof(int));
2029         QDIO_PRINT_ERR("received check condition on activate " \
2030                        "queues on device %s (cs=x%x, ds=x%x).\n",
2031                        cdev->dev.bus_id, cstat, dstat);
2032         if (irq_ptr->no_input_qs) {
2033                 q=irq_ptr->input_qs[0];
2034         } else if (irq_ptr->no_output_qs) {
2035                 q=irq_ptr->output_qs[0];
2036         } else {
2037                 QDIO_PRINT_ERR("oops... no queue registered for device %s!?\n",
2038                                cdev->dev.bus_id);
2039                 goto omit_handler_call;
2040         }
2041         q->handler(q->cdev,QDIO_STATUS_ACTIVATE_CHECK_CONDITION|
2042                    QDIO_STATUS_LOOK_FOR_ERROR,
2043                    0,0,0,-1,-1,q->int_parm);
2044 omit_handler_call:
2045         qdio_set_state(irq_ptr,QDIO_IRQ_STATE_STOPPED);
2046
2047 }
2048
2049 static void
2050 qdio_call_shutdown(void *data)
2051 {
2052         struct ccw_device *cdev;
2053
2054         cdev = (struct ccw_device *)data;
2055         qdio_shutdown(cdev, QDIO_FLAG_CLEANUP_USING_CLEAR);
2056         put_device(&cdev->dev);
2057 }
2058
2059 static void
2060 qdio_timeout_handler(struct ccw_device *cdev)
2061 {
2062         struct qdio_irq *irq_ptr;
2063         char dbf_text[15];
2064
2065         QDIO_DBF_TEXT2(0, trace, "qtoh");
2066         sprintf(dbf_text, "%s", cdev->dev.bus_id);
2067         QDIO_DBF_TEXT2(0, trace, dbf_text);
2068
2069         irq_ptr = cdev->private->qdio_data;
2070         sprintf(dbf_text, "state:%d", irq_ptr->state);
2071         QDIO_DBF_TEXT2(0, trace, dbf_text);
2072
2073         switch (irq_ptr->state) {
2074         case QDIO_IRQ_STATE_INACTIVE:
2075                 QDIO_PRINT_ERR("establish queues on irq 0.%x.%04x: timed out\n",
2076                                irq_ptr->schid.ssid, irq_ptr->schid.sch_no);
2077                 QDIO_DBF_TEXT2(1,setup,"eq:timeo");
2078                 qdio_set_state(irq_ptr, QDIO_IRQ_STATE_ERR);
2079                 break;
2080         case QDIO_IRQ_STATE_CLEANUP:
2081                 QDIO_PRINT_INFO("Did not get interrupt on cleanup, "
2082                                 "irq=0.%x.%x.\n",
2083                                 irq_ptr->schid.ssid, irq_ptr->schid.sch_no);
2084                 qdio_set_state(irq_ptr, QDIO_IRQ_STATE_ERR);
2085                 break;
2086         case QDIO_IRQ_STATE_ESTABLISHED:
2087         case QDIO_IRQ_STATE_ACTIVE:
2088                 /* I/O has been terminated by common I/O layer. */
2089                 QDIO_PRINT_INFO("Queues on irq 0.%x.%04x killed by cio.\n",
2090                                 irq_ptr->schid.ssid, irq_ptr->schid.sch_no);
2091                 QDIO_DBF_TEXT2(1, trace, "cio:term");
2092                 qdio_set_state(irq_ptr, QDIO_IRQ_STATE_STOPPED);
2093                 if (get_device(&cdev->dev)) {
2094                         /* Can't call shutdown from interrupt context. */
2095                         PREPARE_WORK(&cdev->private->kick_work,
2096                                      qdio_call_shutdown, (void *)cdev);
2097                         queue_work(ccw_device_work, &cdev->private->kick_work);
2098                 }
2099                 break;
2100         default:
2101                 BUG();
2102         }
2103         ccw_device_set_timeout(cdev, 0);
2104         wake_up(&cdev->private->wait_q);
2105 }
2106
2107 static void
2108 qdio_handler(struct ccw_device *cdev, unsigned long intparm, struct irb *irb)
2109 {
2110         struct qdio_irq *irq_ptr;
2111         int cstat,dstat;
2112         char dbf_text[15];
2113
2114 #ifdef CONFIG_QDIO_DEBUG
2115         QDIO_DBF_TEXT4(0, trace, "qint");
2116         sprintf(dbf_text, "%s", cdev->dev.bus_id);
2117         QDIO_DBF_TEXT4(0, trace, dbf_text);
2118 #endif /* CONFIG_QDIO_DEBUG */
2119
2120         if (!intparm) {
2121                 QDIO_PRINT_ERR("got unsolicited interrupt in qdio " \
2122                                   "handler, device %s\n", cdev->dev.bus_id);
2123                 return;
2124         }
2125
2126         irq_ptr = cdev->private->qdio_data;
2127         if (!irq_ptr) {
2128                 QDIO_DBF_TEXT2(1, trace, "uint");
2129                 sprintf(dbf_text,"%s", cdev->dev.bus_id);
2130                 QDIO_DBF_TEXT2(1,trace,dbf_text);
2131                 QDIO_PRINT_ERR("received interrupt on unused device %s!\n",
2132                                cdev->dev.bus_id);
2133                 return;
2134         }
2135
2136         if (IS_ERR(irb)) {
2137                 /* Currently running i/o is in error. */
2138                 switch (PTR_ERR(irb)) {
2139                 case -EIO:
2140                         QDIO_PRINT_ERR("i/o error on device %s\n",
2141                                        cdev->dev.bus_id);
2142                         return;
2143                 case -ETIMEDOUT:
2144                         qdio_timeout_handler(cdev);
2145                         return;
2146                 default:
2147                         QDIO_PRINT_ERR("unknown error state %ld on device %s\n",
2148                                        PTR_ERR(irb), cdev->dev.bus_id);
2149                         return;
2150                 }
2151         }
2152
2153         qdio_irq_check_sense(irq_ptr->schid, irb);
2154
2155 #ifdef CONFIG_QDIO_DEBUG
2156         sprintf(dbf_text, "state:%d", irq_ptr->state);
2157         QDIO_DBF_TEXT4(0, trace, dbf_text);
2158 #endif /* CONFIG_QDIO_DEBUG */
2159
2160         cstat = irb->scsw.cstat;
2161         dstat = irb->scsw.dstat;
2162
2163         switch (irq_ptr->state) {
2164         case QDIO_IRQ_STATE_INACTIVE:
2165                 qdio_establish_handle_irq(cdev, cstat, dstat);
2166                 break;
2167
2168         case QDIO_IRQ_STATE_CLEANUP:
2169                 qdio_set_state(irq_ptr, QDIO_IRQ_STATE_INACTIVE);
2170                 break;
2171
2172         case QDIO_IRQ_STATE_ESTABLISHED:
2173         case QDIO_IRQ_STATE_ACTIVE:
2174                 if (cstat & SCHN_STAT_PCI) {
2175                         qdio_handle_pci(irq_ptr);
2176                         break;
2177                 }
2178
2179                 if ((cstat&~SCHN_STAT_PCI)||dstat) {
2180                         qdio_handle_activate_check(cdev, intparm, cstat, dstat);
2181                         break;
2182                 }
2183         default:
2184                 QDIO_PRINT_ERR("got interrupt for queues in state %d on " \
2185                                "device %s?!\n",
2186                                irq_ptr->state, cdev->dev.bus_id);
2187         }
2188         wake_up(&cdev->private->wait_q);
2189
2190 }
2191
2192 int
2193 qdio_synchronize(struct ccw_device *cdev, unsigned int flags,
2194                  unsigned int queue_number)
2195 {
2196         int cc = 0;
2197         struct qdio_q *q;
2198         struct qdio_irq *irq_ptr;
2199         void *ptr;
2200 #ifdef CONFIG_QDIO_DEBUG
2201         char dbf_text[15]="SyncXXXX";
2202 #endif
2203
2204         irq_ptr = cdev->private->qdio_data;
2205         if (!irq_ptr)
2206                 return -ENODEV;
2207
2208 #ifdef CONFIG_QDIO_DEBUG
2209         *((int*)(&dbf_text[4])) = irq_ptr->schid.sch_no;
2210         QDIO_DBF_HEX4(0,trace,dbf_text,QDIO_DBF_TRACE_LEN);
2211         *((int*)(&dbf_text[0]))=flags;
2212         *((int*)(&dbf_text[4]))=queue_number;
2213         QDIO_DBF_HEX4(0,trace,dbf_text,QDIO_DBF_TRACE_LEN);
2214 #endif /* CONFIG_QDIO_DEBUG */
2215
2216         if (flags&QDIO_FLAG_SYNC_INPUT) {
2217                 q=irq_ptr->input_qs[queue_number];
2218                 if (!q)
2219                         return -EINVAL;
2220                 if (!(irq_ptr->is_qebsm))
2221                         cc = do_siga_sync(q->schid, 0, q->mask);
2222         } else if (flags&QDIO_FLAG_SYNC_OUTPUT) {
2223                 q=irq_ptr->output_qs[queue_number];
2224                 if (!q)
2225                         return -EINVAL;
2226                 if (!(irq_ptr->is_qebsm))
2227                         cc = do_siga_sync(q->schid, q->mask, 0);
2228         } else
2229                 return -EINVAL;
2230
2231         ptr=&cc;
2232         if (cc)
2233                 QDIO_DBF_HEX3(0,trace,&ptr,sizeof(int));
2234
2235         return cc;
2236 }
2237
2238 static inline void
2239 qdio_check_subchannel_qebsm(struct qdio_irq *irq_ptr, unsigned char qdioac,
2240                             unsigned long token)
2241 {
2242         struct qdio_q *q;
2243         int i;
2244         unsigned int count, start_buf;
2245         char dbf_text[15];
2246
2247         /*check if QEBSM is disabled */
2248         if (!(irq_ptr->is_qebsm) || !(qdioac & 0x01)) {
2249                 irq_ptr->is_qebsm  = 0;
2250                 irq_ptr->sch_token = 0;
2251                 irq_ptr->qib.rflags &= ~QIB_RFLAGS_ENABLE_QEBSM;
2252                 QDIO_DBF_TEXT0(0,setup,"noV=V");
2253                 return;
2254         }
2255         irq_ptr->sch_token = token;
2256         /*input queue*/
2257         for (i = 0; i < irq_ptr->no_input_qs;i++) {
2258                 q = irq_ptr->input_qs[i];
2259                 count = QDIO_MAX_BUFFERS_PER_Q;
2260                 start_buf = 0;
2261                 set_slsb(q, &start_buf, SLSB_P_INPUT_NOT_INIT, &count);
2262         }
2263         sprintf(dbf_text,"V=V:%2x",irq_ptr->is_qebsm);
2264         QDIO_DBF_TEXT0(0,setup,dbf_text);
2265         sprintf(dbf_text,"%8lx",irq_ptr->sch_token);
2266         QDIO_DBF_TEXT0(0,setup,dbf_text);
2267         /*output queue*/
2268         for (i = 0; i < irq_ptr->no_output_qs; i++) {
2269                 q = irq_ptr->output_qs[i];
2270                 count = QDIO_MAX_BUFFERS_PER_Q;
2271                 start_buf = 0;
2272                 set_slsb(q, &start_buf, SLSB_P_OUTPUT_NOT_INIT, &count);
2273         }
2274 }
2275
2276 static void
2277 qdio_get_ssqd_information(struct qdio_irq *irq_ptr)
2278 {
2279         int result;
2280         unsigned char qdioac;
2281         struct {
2282                 struct chsc_header request;
2283                 u16 reserved1:10;
2284                 u16 ssid:2;
2285                 u16 fmt:4;
2286                 u16 first_sch;
2287                 u16 reserved2;
2288                 u16 last_sch;
2289                 u32 reserved3;
2290                 struct chsc_header response;
2291                 u32 reserved4;
2292                 u8  flags;
2293                 u8  reserved5;
2294                 u16 sch;
2295                 u8  qfmt;
2296                 u8  parm;
2297                 u8  qdioac1;
2298                 u8  sch_class;
2299                 u8  reserved7;
2300                 u8  icnt;
2301                 u8  reserved8;
2302                 u8  ocnt;
2303                 u8 reserved9;
2304                 u8 mbccnt;
2305                 u16 qdioac2;
2306                 u64 sch_token;
2307         } *ssqd_area;
2308
2309         QDIO_DBF_TEXT0(0,setup,"getssqd");
2310         qdioac = 0;
2311         ssqd_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA);
2312         if (!ssqd_area) {
2313                 QDIO_PRINT_WARN("Could not get memory for chsc. Using all " \
2314                                 "SIGAs for sch x%x.\n", irq_ptr->schid.sch_no);
2315                 irq_ptr->qdioac = CHSC_FLAG_SIGA_INPUT_NECESSARY ||
2316                                   CHSC_FLAG_SIGA_OUTPUT_NECESSARY ||
2317                                   CHSC_FLAG_SIGA_SYNC_NECESSARY; /* all flags set */
2318                 irq_ptr->is_qebsm = 0;
2319                 irq_ptr->sch_token = 0;
2320                 irq_ptr->qib.rflags &= ~QIB_RFLAGS_ENABLE_QEBSM;
2321                 return;
2322         }
2323
2324         ssqd_area->request = (struct chsc_header) {
2325                 .length = 0x0010,
2326                 .code   = 0x0024,
2327         };
2328         ssqd_area->first_sch = irq_ptr->schid.sch_no;
2329         ssqd_area->last_sch = irq_ptr->schid.sch_no;
2330         ssqd_area->ssid = irq_ptr->schid.ssid;
2331         result = chsc(ssqd_area);
2332
2333         if (result) {
2334                 QDIO_PRINT_WARN("CHSC returned cc %i. Using all " \
2335                                 "SIGAs for sch 0.%x.%x.\n", result,
2336                                 irq_ptr->schid.ssid, irq_ptr->schid.sch_no);
2337                 qdioac = CHSC_FLAG_SIGA_INPUT_NECESSARY ||
2338                         CHSC_FLAG_SIGA_OUTPUT_NECESSARY ||
2339                         CHSC_FLAG_SIGA_SYNC_NECESSARY; /* all flags set */
2340                 irq_ptr->is_qebsm  = 0;
2341                 goto out;
2342         }
2343
2344         if (ssqd_area->response.code != QDIO_CHSC_RESPONSE_CODE_OK) {
2345                 QDIO_PRINT_WARN("response upon checking SIGA needs " \
2346                                 "is 0x%x. Using all SIGAs for sch 0.%x.%x.\n",
2347                                 ssqd_area->response.code,
2348                                 irq_ptr->schid.ssid, irq_ptr->schid.sch_no);
2349                 qdioac = CHSC_FLAG_SIGA_INPUT_NECESSARY ||
2350                         CHSC_FLAG_SIGA_OUTPUT_NECESSARY ||
2351                         CHSC_FLAG_SIGA_SYNC_NECESSARY; /* all flags set */
2352                 irq_ptr->is_qebsm  = 0;
2353                 goto out;
2354         }
2355         if (!(ssqd_area->flags & CHSC_FLAG_QDIO_CAPABILITY) ||
2356             !(ssqd_area->flags & CHSC_FLAG_VALIDITY) ||
2357             (ssqd_area->sch != irq_ptr->schid.sch_no)) {
2358                 QDIO_PRINT_WARN("huh? problems checking out sch 0.%x.%x... " \
2359                                 "using all SIGAs.\n",
2360                                 irq_ptr->schid.ssid, irq_ptr->schid.sch_no);
2361                 qdioac = CHSC_FLAG_SIGA_INPUT_NECESSARY |
2362                         CHSC_FLAG_SIGA_OUTPUT_NECESSARY |
2363                         CHSC_FLAG_SIGA_SYNC_NECESSARY; /* worst case */
2364                 irq_ptr->is_qebsm  = 0;
2365                 goto out;
2366         }
2367         qdioac = ssqd_area->qdioac1;
2368 out:
2369         qdio_check_subchannel_qebsm(irq_ptr, qdioac,
2370                                     ssqd_area->sch_token);
2371         free_page ((unsigned long) ssqd_area);
2372         irq_ptr->qdioac = qdioac;
2373 }
2374
2375 static unsigned int
2376 tiqdio_check_chsc_availability(void)
2377 {
2378         char dbf_text[15];
2379
2380         if (!css_characteristics_avail)
2381                 return -EIO;
2382
2383         /* Check for bit 41. */
2384         if (!css_general_characteristics.aif) {
2385                 QDIO_PRINT_WARN("Adapter interruption facility not " \
2386                                 "installed.\n");
2387                 return -ENOENT;
2388         }
2389
2390         /* Check for bits 107 and 108. */
2391         if (!css_chsc_characteristics.scssc ||
2392             !css_chsc_characteristics.scsscf) {
2393                 QDIO_PRINT_WARN("Set Chan Subsys. Char. & Fast-CHSCs " \
2394                                 "not available.\n");
2395                 return -ENOENT;
2396         }
2397
2398         /* Check for OSA/FCP thin interrupts (bit 67). */
2399         hydra_thinints = css_general_characteristics.aif_osa;
2400         sprintf(dbf_text,"hydrati%1x", hydra_thinints);
2401         QDIO_DBF_TEXT0(0,setup,dbf_text);
2402
2403 #ifdef CONFIG_64BIT
2404         /* Check for QEBSM support in general (bit 58). */
2405         is_passthrough = css_general_characteristics.qebsm;
2406 #endif
2407         sprintf(dbf_text,"cssQBS:%1x", is_passthrough);
2408         QDIO_DBF_TEXT0(0,setup,dbf_text);
2409
2410         /* Check for aif time delay disablement fac (bit 56). If installed,
2411          * omit svs even under lpar (good point by rick again) */
2412         omit_svs = css_general_characteristics.aif_tdd;
2413         sprintf(dbf_text,"omitsvs%1x", omit_svs);
2414         QDIO_DBF_TEXT0(0,setup,dbf_text);
2415         return 0;
2416 }
2417
2418
2419 static unsigned int
2420 tiqdio_set_subchannel_ind(struct qdio_irq *irq_ptr, int reset_to_zero)
2421 {
2422         unsigned long real_addr_local_summary_bit;
2423         unsigned long real_addr_dev_st_chg_ind;
2424         void *ptr;
2425         char dbf_text[15];
2426
2427         unsigned int resp_code;
2428         int result;
2429
2430         struct {
2431                 struct chsc_header request;
2432                 u16 operation_code;
2433                 u16 reserved1;
2434                 u32 reserved2;
2435                 u32 reserved3;
2436                 u64 summary_indicator_addr;
2437                 u64 subchannel_indicator_addr;
2438                 u32 ks:4;
2439                 u32 kc:4;
2440                 u32 reserved4:21;
2441                 u32 isc:3;
2442                 u32 word_with_d_bit;
2443                 /* set to 0x10000000 to enable
2444                  * time delay disablement facility */
2445                 u32 reserved5;
2446                 struct subchannel_id schid;
2447                 u32 reserved6[1004];
2448                 struct chsc_header response;
2449                 u32 reserved7;
2450         } *scssc_area;
2451
2452         if (!irq_ptr->is_thinint_irq)
2453                 return -ENODEV;
2454
2455         if (reset_to_zero) {
2456                 real_addr_local_summary_bit=0;
2457                 real_addr_dev_st_chg_ind=0;
2458         } else {
2459                 real_addr_local_summary_bit=
2460                         virt_to_phys((volatile void *)indicators);
2461                 real_addr_dev_st_chg_ind=
2462                         virt_to_phys((volatile void *)irq_ptr->dev_st_chg_ind);
2463         }
2464
2465         scssc_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA);
2466         if (!scssc_area) {
2467                 QDIO_PRINT_WARN("No memory for setting indicators on " \
2468                                 "subchannel 0.%x.%x.\n",
2469                                 irq_ptr->schid.ssid, irq_ptr->schid.sch_no);
2470                 return -ENOMEM;
2471         }
2472         scssc_area->request = (struct chsc_header) {
2473                 .length = 0x0fe0,
2474                 .code   = 0x0021,
2475         };
2476         scssc_area->operation_code = 0;
2477
2478         scssc_area->summary_indicator_addr = real_addr_local_summary_bit;
2479         scssc_area->subchannel_indicator_addr = real_addr_dev_st_chg_ind;
2480         scssc_area->ks = QDIO_STORAGE_KEY;
2481         scssc_area->kc = QDIO_STORAGE_KEY;
2482         scssc_area->isc = TIQDIO_THININT_ISC;
2483         scssc_area->schid = irq_ptr->schid;
2484         /* enables the time delay disablement facility. Don't care
2485          * whether it is really there (i.e. we haven't checked for
2486          * it) */
2487         if (css_general_characteristics.aif_tdd)
2488                 scssc_area->word_with_d_bit = 0x10000000;
2489         else
2490                 QDIO_PRINT_WARN("Time delay disablement facility " \
2491                                 "not available\n");
2492
2493         result = chsc(scssc_area);
2494         if (result) {
2495                 QDIO_PRINT_WARN("could not set indicators on irq 0.%x.%x, " \
2496                                 "cc=%i.\n",
2497                                 irq_ptr->schid.ssid, irq_ptr->schid.sch_no,result);
2498                 result = -EIO;
2499                 goto out;
2500         }
2501
2502         resp_code = scssc_area->response.code;
2503         if (resp_code!=QDIO_CHSC_RESPONSE_CODE_OK) {
2504                 QDIO_PRINT_WARN("response upon setting indicators " \
2505                                 "is 0x%x.\n",resp_code);
2506                 sprintf(dbf_text,"sidR%4x",resp_code);
2507                 QDIO_DBF_TEXT1(0,trace,dbf_text);
2508                 QDIO_DBF_TEXT1(0,setup,dbf_text);
2509                 ptr=&scssc_area->response;
2510                 QDIO_DBF_HEX2(1,setup,&ptr,QDIO_DBF_SETUP_LEN);
2511                 result = -EIO;
2512                 goto out;
2513         }
2514
2515         QDIO_DBF_TEXT2(0,setup,"setscind");
2516         QDIO_DBF_HEX2(0,setup,&real_addr_local_summary_bit,
2517                       sizeof(unsigned long));
2518         QDIO_DBF_HEX2(0,setup,&real_addr_dev_st_chg_ind,sizeof(unsigned long));
2519         result = 0;
2520 out:
2521         free_page ((unsigned long) scssc_area);
2522         return result;
2523
2524 }
2525
2526 static unsigned int
2527 tiqdio_set_delay_target(struct qdio_irq *irq_ptr, unsigned long delay_target)
2528 {
2529         unsigned int resp_code;
2530         int result;
2531         void *ptr;
2532         char dbf_text[15];
2533
2534         struct {
2535                 struct chsc_header request;
2536                 u16 operation_code;
2537                 u16 reserved1;
2538                 u32 reserved2;
2539                 u32 reserved3;
2540                 u32 reserved4[2];
2541                 u32 delay_target;
2542                 u32 reserved5[1009];
2543                 struct chsc_header response;
2544                 u32 reserved6;
2545         } *scsscf_area;
2546
2547         if (!irq_ptr->is_thinint_irq)
2548                 return -ENODEV;
2549
2550         scsscf_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA);
2551         if (!scsscf_area) {
2552                 QDIO_PRINT_WARN("No memory for setting delay target on " \
2553                                 "subchannel 0.%x.%x.\n",
2554                                 irq_ptr->schid.ssid, irq_ptr->schid.sch_no);
2555                 return -ENOMEM;
2556         }
2557         scsscf_area->request = (struct chsc_header) {
2558                 .length = 0x0fe0,
2559                 .code   = 0x1027,
2560         };
2561
2562         scsscf_area->delay_target = delay_target<<16;
2563
2564         result=chsc(scsscf_area);
2565         if (result) {
2566                 QDIO_PRINT_WARN("could not set delay target on irq 0.%x.%x, " \
2567                                 "cc=%i. Continuing.\n",
2568                                 irq_ptr->schid.ssid, irq_ptr->schid.sch_no,
2569                                 result);
2570                 result = -EIO;
2571                 goto out;
2572         }
2573
2574         resp_code = scsscf_area->response.code;
2575         if (resp_code!=QDIO_CHSC_RESPONSE_CODE_OK) {
2576                 QDIO_PRINT_WARN("response upon setting delay target " \
2577                                 "is 0x%x. Continuing.\n",resp_code);
2578                 sprintf(dbf_text,"sdtR%4x",resp_code);
2579                 QDIO_DBF_TEXT1(0,trace,dbf_text);
2580                 QDIO_DBF_TEXT1(0,setup,dbf_text);
2581                 ptr=&scsscf_area->response;
2582                 QDIO_DBF_HEX2(1,trace,&ptr,QDIO_DBF_TRACE_LEN);
2583         }
2584         QDIO_DBF_TEXT2(0,trace,"delytrgt");
2585         QDIO_DBF_HEX2(0,trace,&delay_target,sizeof(unsigned long));
2586         result = 0; /* not critical */
2587 out:
2588         free_page ((unsigned long) scsscf_area);
2589         return result;
2590 }
2591
2592 int
2593 qdio_cleanup(struct ccw_device *cdev, int how)
2594 {
2595         struct qdio_irq *irq_ptr;
2596         char dbf_text[15];
2597         int rc;
2598
2599         irq_ptr = cdev->private->qdio_data;
2600         if (!irq_ptr)
2601                 return -ENODEV;
2602
2603         sprintf(dbf_text,"qcln%4x",irq_ptr->schid.sch_no);
2604         QDIO_DBF_TEXT1(0,trace,dbf_text);
2605         QDIO_DBF_TEXT0(0,setup,dbf_text);
2606
2607         rc = qdio_shutdown(cdev, how);
2608         if ((rc == 0) || (rc == -EINPROGRESS))
2609                 rc = qdio_free(cdev);
2610         return rc;
2611 }
2612
2613 int
2614 qdio_shutdown(struct ccw_device *cdev, int how)
2615 {
2616         struct qdio_irq *irq_ptr;
2617         int i;
2618         int result = 0;
2619         int rc;
2620         unsigned long flags;
2621         int timeout;
2622         char dbf_text[15];
2623
2624         irq_ptr = cdev->private->qdio_data;
2625         if (!irq_ptr)
2626                 return -ENODEV;
2627
2628         down(&irq_ptr->setting_up_sema);
2629
2630         sprintf(dbf_text,"qsqs%4x",irq_ptr->schid.sch_no);
2631         QDIO_DBF_TEXT1(0,trace,dbf_text);
2632         QDIO_DBF_TEXT0(0,setup,dbf_text);
2633
2634         /* mark all qs as uninteresting */
2635         for (i=0;i<irq_ptr->no_input_qs;i++)
2636                 atomic_set(&irq_ptr->input_qs[i]->is_in_shutdown,1);
2637
2638         for (i=0;i<irq_ptr->no_output_qs;i++)
2639                 atomic_set(&irq_ptr->output_qs[i]->is_in_shutdown,1);
2640
2641         tasklet_kill(&tiqdio_tasklet);
2642
2643         for (i=0;i<irq_ptr->no_input_qs;i++) {
2644                 qdio_unmark_q(irq_ptr->input_qs[i]);
2645                 tasklet_kill(&irq_ptr->input_qs[i]->tasklet);
2646                 wait_event_interruptible_timeout(cdev->private->wait_q,
2647                                                  !atomic_read(&irq_ptr->
2648                                                               input_qs[i]->
2649                                                               use_count),
2650                                                  QDIO_NO_USE_COUNT_TIMEOUT);
2651                 if (atomic_read(&irq_ptr->input_qs[i]->use_count))
2652                         result=-EINPROGRESS;
2653         }
2654
2655         for (i=0;i<irq_ptr->no_output_qs;i++) {
2656                 tasklet_kill(&irq_ptr->output_qs[i]->tasklet);
2657                 wait_event_interruptible_timeout(cdev->private->wait_q,
2658                                                  !atomic_read(&irq_ptr->
2659                                                               output_qs[i]->
2660                                                               use_count),
2661                                                  QDIO_NO_USE_COUNT_TIMEOUT);
2662                 if (atomic_read(&irq_ptr->output_qs[i]->use_count))
2663                         result=-EINPROGRESS;
2664         }
2665
2666         /* cleanup subchannel */
2667         spin_lock_irqsave(get_ccwdev_lock(cdev),flags);
2668         if (how&QDIO_FLAG_CLEANUP_USING_CLEAR) {
2669                 rc = ccw_device_clear(cdev, QDIO_DOING_CLEANUP);
2670                 timeout=QDIO_CLEANUP_CLEAR_TIMEOUT;
2671         } else if (how&QDIO_FLAG_CLEANUP_USING_HALT) {
2672                 rc = ccw_device_halt(cdev, QDIO_DOING_CLEANUP);
2673                 timeout=QDIO_CLEANUP_HALT_TIMEOUT;
2674         } else { /* default behaviour */
2675                 rc = ccw_device_halt(cdev, QDIO_DOING_CLEANUP);
2676                 timeout=QDIO_CLEANUP_HALT_TIMEOUT;
2677         }
2678         if (rc == -ENODEV) {
2679                 /* No need to wait for device no longer present. */
2680                 qdio_set_state(irq_ptr, QDIO_IRQ_STATE_INACTIVE);
2681                 spin_unlock_irqrestore(get_ccwdev_lock(cdev), flags);
2682         } else if (((void *)cdev->handler != (void *)qdio_handler) && rc == 0) {
2683                 /*
2684                  * Whoever put another handler there, has to cope with the
2685                  * interrupt theirself. Might happen if qdio_shutdown was
2686                  * called on already shutdown queues, but this shouldn't have
2687                  * bad side effects.
2688                  */
2689                 qdio_set_state(irq_ptr, QDIO_IRQ_STATE_INACTIVE);
2690                 spin_unlock_irqrestore(get_ccwdev_lock(cdev), flags);
2691         } else if (rc == 0) {
2692                 qdio_set_state(irq_ptr, QDIO_IRQ_STATE_CLEANUP);
2693                 ccw_device_set_timeout(cdev, timeout);
2694                 spin_unlock_irqrestore(get_ccwdev_lock(cdev),flags);
2695
2696                 wait_event(cdev->private->wait_q,
2697                            irq_ptr->state == QDIO_IRQ_STATE_INACTIVE ||
2698                            irq_ptr->state == QDIO_IRQ_STATE_ERR);
2699         } else {
2700                 QDIO_PRINT_INFO("ccw_device_{halt,clear} returned %d for "
2701                                 "device %s\n", result, cdev->dev.bus_id);
2702                 spin_unlock_irqrestore(get_ccwdev_lock(cdev), flags);
2703                 result = rc;
2704                 goto out;
2705         }
2706         if (irq_ptr->is_thinint_irq) {
2707                 qdio_put_indicator((__u32*)irq_ptr->dev_st_chg_ind);
2708                 tiqdio_set_subchannel_ind(irq_ptr,1);
2709                 /* reset adapter interrupt indicators */
2710         }
2711
2712         /* exchange int handlers, if necessary */
2713         if ((void*)cdev->handler == (void*)qdio_handler)
2714                 cdev->handler=irq_ptr->original_int_handler;
2715
2716         /* Ignore errors. */
2717         qdio_set_state(irq_ptr, QDIO_IRQ_STATE_INACTIVE);
2718         ccw_device_set_timeout(cdev, 0);
2719 out:
2720         up(&irq_ptr->setting_up_sema);
2721         return result;
2722 }
2723
2724 int
2725 qdio_free(struct ccw_device *cdev)
2726 {
2727         struct qdio_irq *irq_ptr;
2728         char dbf_text[15];
2729
2730         irq_ptr = cdev->private->qdio_data;
2731         if (!irq_ptr)
2732                 return -ENODEV;
2733
2734         down(&irq_ptr->setting_up_sema);
2735
2736         sprintf(dbf_text,"qfqs%4x",irq_ptr->schid.sch_no);
2737         QDIO_DBF_TEXT1(0,trace,dbf_text);
2738         QDIO_DBF_TEXT0(0,setup,dbf_text);
2739
2740         cdev->private->qdio_data = 0;
2741
2742         up(&irq_ptr->setting_up_sema);
2743
2744         qdio_release_irq_memory(irq_ptr);
2745         module_put(THIS_MODULE);
2746         return 0;
2747 }
2748
2749 static inline void
2750 qdio_allocate_do_dbf(struct qdio_initialize *init_data)
2751 {
2752         char dbf_text[20]; /* if a printf printed out more than 8 chars */
2753
2754         sprintf(dbf_text,"qfmt:%x",init_data->q_format);
2755         QDIO_DBF_TEXT0(0,setup,dbf_text);
2756         QDIO_DBF_HEX0(0,setup,init_data->adapter_name,8);
2757         sprintf(dbf_text,"qpff%4x",init_data->qib_param_field_format);
2758         QDIO_DBF_TEXT0(0,setup,dbf_text);
2759         QDIO_DBF_HEX0(0,setup,&init_data->qib_param_field,sizeof(char*));
2760         QDIO_DBF_HEX0(0,setup,&init_data->input_slib_elements,sizeof(long*));
2761         QDIO_DBF_HEX0(0,setup,&init_data->output_slib_elements,sizeof(long*));
2762         sprintf(dbf_text,"miit%4x",init_data->min_input_threshold);
2763         QDIO_DBF_TEXT0(0,setup,dbf_text);
2764         sprintf(dbf_text,"mait%4x",init_data->max_input_threshold);
2765         QDIO_DBF_TEXT0(0,setup,dbf_text);
2766         sprintf(dbf_text,"miot%4x",init_data->min_output_threshold);
2767         QDIO_DBF_TEXT0(0,setup,dbf_text);
2768         sprintf(dbf_text,"maot%4x",init_data->max_output_threshold);
2769         QDIO_DBF_TEXT0(0,setup,dbf_text);
2770         sprintf(dbf_text,"niq:%4x",init_data->no_input_qs);
2771         QDIO_DBF_TEXT0(0,setup,dbf_text);
2772         sprintf(dbf_text,"noq:%4x",init_data->no_output_qs);
2773         QDIO_DBF_TEXT0(0,setup,dbf_text);
2774         QDIO_DBF_HEX0(0,setup,&init_data->input_handler,sizeof(void*));
2775         QDIO_DBF_HEX0(0,setup,&init_data->output_handler,sizeof(void*));
2776         QDIO_DBF_HEX0(0,setup,&init_data->int_parm,sizeof(long));
2777         QDIO_DBF_HEX0(0,setup,&init_data->flags,sizeof(long));
2778         QDIO_DBF_HEX0(0,setup,&init_data->input_sbal_addr_array,sizeof(void*));
2779         QDIO_DBF_HEX0(0,setup,&init_data->output_sbal_addr_array,sizeof(void*));
2780 }
2781
2782 static inline void
2783 qdio_allocate_fill_input_desc(struct qdio_irq *irq_ptr, int i, int iqfmt)
2784 {
2785         irq_ptr->input_qs[i]->is_iqdio_q = iqfmt;
2786         irq_ptr->input_qs[i]->is_thinint_q = irq_ptr->is_thinint_irq;
2787
2788         irq_ptr->qdr->qdf0[i].sliba=(unsigned long)(irq_ptr->input_qs[i]->slib);
2789
2790         irq_ptr->qdr->qdf0[i].sla=(unsigned long)(irq_ptr->input_qs[i]->sl);
2791
2792         irq_ptr->qdr->qdf0[i].slsba=
2793                 (unsigned long)(&irq_ptr->input_qs[i]->slsb.acc.val[0]);
2794
2795         irq_ptr->qdr->qdf0[i].akey=QDIO_STORAGE_KEY;
2796         irq_ptr->qdr->qdf0[i].bkey=QDIO_STORAGE_KEY;
2797         irq_ptr->qdr->qdf0[i].ckey=QDIO_STORAGE_KEY;
2798         irq_ptr->qdr->qdf0[i].dkey=QDIO_STORAGE_KEY;
2799 }
2800
2801 static inline void
2802 qdio_allocate_fill_output_desc(struct qdio_irq *irq_ptr, int i,
2803                                int j, int iqfmt)
2804 {
2805         irq_ptr->output_qs[i]->is_iqdio_q = iqfmt;
2806         irq_ptr->output_qs[i]->is_thinint_q = irq_ptr->is_thinint_irq;
2807
2808         irq_ptr->qdr->qdf0[i+j].sliba=(unsigned long)(irq_ptr->output_qs[i]->slib);
2809
2810         irq_ptr->qdr->qdf0[i+j].sla=(unsigned long)(irq_ptr->output_qs[i]->sl);
2811
2812         irq_ptr->qdr->qdf0[i+j].slsba=
2813                 (unsigned long)(&irq_ptr->output_qs[i]->slsb.acc.val[0]);
2814
2815         irq_ptr->qdr->qdf0[i+j].akey=QDIO_STORAGE_KEY;
2816         irq_ptr->qdr->qdf0[i+j].bkey=QDIO_STORAGE_KEY;
2817         irq_ptr->qdr->qdf0[i+j].ckey=QDIO_STORAGE_KEY;
2818         irq_ptr->qdr->qdf0[i+j].dkey=QDIO_STORAGE_KEY;
2819 }
2820
2821
2822 static inline void
2823 qdio_initialize_set_siga_flags_input(struct qdio_irq *irq_ptr)
2824 {
2825         int i;
2826
2827         for (i=0;i<irq_ptr->no_input_qs;i++) {
2828                 irq_ptr->input_qs[i]->siga_sync=
2829                         irq_ptr->qdioac&CHSC_FLAG_SIGA_SYNC_NECESSARY;
2830                 irq_ptr->input_qs[i]->siga_in=
2831                         irq_ptr->qdioac&CHSC_FLAG_SIGA_INPUT_NECESSARY;
2832                 irq_ptr->input_qs[i]->siga_out=
2833                         irq_ptr->qdioac&CHSC_FLAG_SIGA_OUTPUT_NECESSARY;
2834                 irq_ptr->input_qs[i]->siga_sync_done_on_thinints=
2835                         irq_ptr->qdioac&CHSC_FLAG_SIGA_SYNC_DONE_ON_THININTS;
2836                 irq_ptr->input_qs[i]->hydra_gives_outbound_pcis=
2837                         irq_ptr->hydra_gives_outbound_pcis;
2838                 irq_ptr->input_qs[i]->siga_sync_done_on_outb_tis=
2839                         ((irq_ptr->qdioac&
2840                           (CHSC_FLAG_SIGA_SYNC_DONE_ON_OUTB_PCIS|
2841                            CHSC_FLAG_SIGA_SYNC_DONE_ON_THININTS))==
2842                          (CHSC_FLAG_SIGA_SYNC_DONE_ON_OUTB_PCIS|
2843                           CHSC_FLAG_SIGA_SYNC_DONE_ON_THININTS));
2844
2845         }
2846 }
2847
2848 static inline void
2849 qdio_initialize_set_siga_flags_output(struct qdio_irq *irq_ptr)
2850 {
2851         int i;
2852
2853         for (i=0;i<irq_ptr->no_output_qs;i++) {
2854                 irq_ptr->output_qs[i]->siga_sync=
2855                         irq_ptr->qdioac&CHSC_FLAG_SIGA_SYNC_NECESSARY;
2856                 irq_ptr->output_qs[i]->siga_in=
2857                         irq_ptr->qdioac&CHSC_FLAG_SIGA_INPUT_NECESSARY;
2858                 irq_ptr->output_qs[i]->siga_out=
2859                         irq_ptr->qdioac&CHSC_FLAG_SIGA_OUTPUT_NECESSARY;
2860                 irq_ptr->output_qs[i]->siga_sync_done_on_thinints=
2861                         irq_ptr->qdioac&CHSC_FLAG_SIGA_SYNC_DONE_ON_THININTS;
2862                 irq_ptr->output_qs[i]->hydra_gives_outbound_pcis=
2863                         irq_ptr->hydra_gives_outbound_pcis;
2864                 irq_ptr->output_qs[i]->siga_sync_done_on_outb_tis=
2865                         ((irq_ptr->qdioac&
2866                           (CHSC_FLAG_SIGA_SYNC_DONE_ON_OUTB_PCIS|
2867                            CHSC_FLAG_SIGA_SYNC_DONE_ON_THININTS))==
2868                          (CHSC_FLAG_SIGA_SYNC_DONE_ON_OUTB_PCIS|
2869                           CHSC_FLAG_SIGA_SYNC_DONE_ON_THININTS));
2870
2871         }
2872 }
2873
2874 static inline int
2875 qdio_establish_irq_check_for_errors(struct ccw_device *cdev, int cstat,
2876                                     int dstat)
2877 {
2878         char dbf_text[15];
2879         struct qdio_irq *irq_ptr;
2880
2881         irq_ptr = cdev->private->qdio_data;
2882
2883         if (cstat || (dstat & ~(DEV_STAT_CHN_END|DEV_STAT_DEV_END))) {
2884                 sprintf(dbf_text,"ick1%4x",irq_ptr->schid.sch_no);
2885                 QDIO_DBF_TEXT2(1,trace,dbf_text);
2886                 QDIO_DBF_HEX2(0,trace,&dstat,sizeof(int));
2887                 QDIO_DBF_HEX2(0,trace,&cstat,sizeof(int));
2888                 QDIO_PRINT_ERR("received check condition on establish " \
2889                                "queues on irq 0.%x.%x (cs=x%x, ds=x%x).\n",
2890                                irq_ptr->schid.ssid, irq_ptr->schid.sch_no,
2891                                cstat,dstat);
2892                 qdio_set_state(irq_ptr,QDIO_IRQ_STATE_ERR);
2893         }
2894
2895         if (!(dstat & DEV_STAT_DEV_END)) {
2896                 QDIO_DBF_TEXT2(1,setup,"eq:no de");
2897                 QDIO_DBF_HEX2(0,setup,&dstat, sizeof(dstat));
2898                 QDIO_DBF_HEX2(0,setup,&cstat, sizeof(cstat));
2899                 QDIO_PRINT_ERR("establish queues on irq 0.%x.%04x: didn't get "
2900                                "device end: dstat=%02x, cstat=%02x\n",
2901                                irq_ptr->schid.ssid, irq_ptr->schid.sch_no,
2902                                dstat, cstat);
2903                 qdio_set_state(irq_ptr, QDIO_IRQ_STATE_ERR);
2904                 return 1;
2905         }
2906
2907         if (dstat & ~(DEV_STAT_CHN_END|DEV_STAT_DEV_END)) {
2908                 QDIO_DBF_TEXT2(1,setup,"eq:badio");
2909                 QDIO_DBF_HEX2(0,setup,&dstat, sizeof(dstat));
2910                 QDIO_DBF_HEX2(0,setup,&cstat, sizeof(cstat));
2911                 QDIO_PRINT_ERR("establish queues on irq 0.%x.%04x: got "
2912                                "the following devstat: dstat=%02x, "
2913                                "cstat=%02x\n", irq_ptr->schid.ssid,
2914                                irq_ptr->schid.sch_no, dstat, cstat);
2915                 qdio_set_state(irq_ptr, QDIO_IRQ_STATE_ERR);
2916                 return 1;
2917         }
2918         return 0;
2919 }
2920
2921 static void
2922 qdio_establish_handle_irq(struct ccw_device *cdev, int cstat, int dstat)
2923 {
2924         struct qdio_irq *irq_ptr;
2925         char dbf_text[15];
2926
2927         irq_ptr = cdev->private->qdio_data;
2928
2929         sprintf(dbf_text,"qehi%4x",cdev->private->sch_no);
2930         QDIO_DBF_TEXT0(0,setup,dbf_text);
2931         QDIO_DBF_TEXT0(0,trace,dbf_text);
2932
2933         if (qdio_establish_irq_check_for_errors(cdev, cstat, dstat)) {
2934                 ccw_device_set_timeout(cdev, 0);
2935                 return;
2936         }
2937
2938         qdio_set_state(irq_ptr,QDIO_IRQ_STATE_ESTABLISHED);
2939         ccw_device_set_timeout(cdev, 0);
2940 }
2941
2942 int
2943 qdio_initialize(struct qdio_initialize *init_data)
2944 {
2945         int rc;
2946         char dbf_text[15];
2947
2948         sprintf(dbf_text,"qini%4x",init_data->cdev->private->sch_no);
2949         QDIO_DBF_TEXT0(0,setup,dbf_text);
2950         QDIO_DBF_TEXT0(0,trace,dbf_text);
2951
2952         rc = qdio_allocate(init_data);
2953         if (rc == 0) {
2954                 rc = qdio_establish(init_data);
2955                 if (rc != 0)
2956                         qdio_free(init_data->cdev);
2957         }
2958
2959         return rc;
2960 }
2961
2962
2963 int
2964 qdio_allocate(struct qdio_initialize *init_data)
2965 {
2966         struct qdio_irq *irq_ptr;
2967         char dbf_text[15];
2968
2969         sprintf(dbf_text,"qalc%4x",init_data->cdev->private->sch_no);
2970         QDIO_DBF_TEXT0(0,setup,dbf_text);
2971         QDIO_DBF_TEXT0(0,trace,dbf_text);
2972         if ( (init_data->no_input_qs>QDIO_MAX_QUEUES_PER_IRQ) ||
2973              (init_data->no_output_qs>QDIO_MAX_QUEUES_PER_IRQ) ||
2974              ((init_data->no_input_qs) && (!init_data->input_handler)) ||
2975              ((init_data->no_output_qs) && (!init_data->output_handler)) )
2976                 return -EINVAL;
2977
2978         if (!init_data->input_sbal_addr_array)
2979                 return -EINVAL;
2980
2981         if (!init_data->output_sbal_addr_array)
2982                 return -EINVAL;
2983
2984         qdio_allocate_do_dbf(init_data);
2985
2986         /* create irq */
2987         irq_ptr=kmalloc(sizeof(struct qdio_irq), GFP_KERNEL | GFP_DMA);
2988
2989         QDIO_DBF_TEXT0(0,setup,"irq_ptr:");
2990         QDIO_DBF_HEX0(0,setup,&irq_ptr,sizeof(void*));
2991
2992         if (!irq_ptr) {
2993                 QDIO_PRINT_ERR("kmalloc of irq_ptr failed!\n");
2994                 return -ENOMEM;
2995         }
2996
2997         memset(irq_ptr,0,sizeof(struct qdio_irq));
2998
2999         init_MUTEX(&irq_ptr->setting_up_sema);
3000
3001         /* QDR must be in DMA area since CCW data address is only 32 bit */
3002         irq_ptr->qdr=kmalloc(sizeof(struct qdr), GFP_KERNEL | GFP_DMA);
3003         if (!(irq_ptr->qdr)) {
3004                 kfree(irq_ptr);
3005                 QDIO_PRINT_ERR("kmalloc of irq_ptr->qdr failed!\n");
3006                 return -ENOMEM;
3007         }
3008         QDIO_DBF_TEXT0(0,setup,"qdr:");
3009         QDIO_DBF_HEX0(0,setup,&irq_ptr->qdr,sizeof(void*));
3010
3011         if (qdio_alloc_qs(irq_ptr,
3012                           init_data->no_input_qs,
3013                           init_data->no_output_qs)) {
3014                 qdio_release_irq_memory(irq_ptr);
3015                 return -ENOMEM;
3016         }
3017
3018         init_data->cdev->private->qdio_data = irq_ptr;
3019
3020         qdio_set_state(irq_ptr,QDIO_IRQ_STATE_INACTIVE);
3021
3022         return 0;
3023 }
3024
3025 int qdio_fill_irq(struct qdio_initialize *init_data)
3026 {
3027         int i;
3028         char dbf_text[15];
3029         struct ciw *ciw;
3030         int is_iqdio;
3031         struct qdio_irq *irq_ptr;
3032
3033         irq_ptr = init_data->cdev->private->qdio_data;
3034
3035         memset(irq_ptr,0,((char*)&irq_ptr->qdr)-((char*)irq_ptr));
3036
3037         /* wipes qib.ac, required by ar7063 */
3038         memset(irq_ptr->qdr,0,sizeof(struct qdr));
3039
3040         irq_ptr->int_parm=init_data->int_parm;
3041
3042         irq_ptr->schid = ccw_device_get_subchannel_id(init_data->cdev);
3043         irq_ptr->no_input_qs=init_data->no_input_qs;
3044         irq_ptr->no_output_qs=init_data->no_output_qs;
3045
3046         if (init_data->q_format==QDIO_IQDIO_QFMT) {
3047                 irq_ptr->is_iqdio_irq=1;
3048                 irq_ptr->is_thinint_irq=1;
3049         } else {
3050                 irq_ptr->is_iqdio_irq=0;
3051                 irq_ptr->is_thinint_irq=hydra_thinints;
3052         }
3053         sprintf(dbf_text,"is_i_t%1x%1x",
3054                 irq_ptr->is_iqdio_irq,irq_ptr->is_thinint_irq);
3055         QDIO_DBF_TEXT2(0,setup,dbf_text);
3056
3057         if (irq_ptr->is_thinint_irq) {
3058                 irq_ptr->dev_st_chg_ind = qdio_get_indicator();
3059                 QDIO_DBF_HEX1(0,setup,&irq_ptr->dev_st_chg_ind,sizeof(void*));
3060                 if (!irq_ptr->dev_st_chg_ind) {
3061                         QDIO_PRINT_WARN("no indicator location available " \
3062                                         "for irq 0.%x.%x\n",
3063                                         irq_ptr->schid.ssid, irq_ptr->schid.sch_no);
3064                         qdio_release_irq_memory(irq_ptr);
3065                         return -ENOBUFS;
3066                 }
3067         }
3068
3069         /* defaults */
3070         irq_ptr->equeue.cmd=DEFAULT_ESTABLISH_QS_CMD;
3071         irq_ptr->equeue.count=DEFAULT_ESTABLISH_QS_COUNT;
3072         irq_ptr->aqueue.cmd=DEFAULT_ACTIVATE_QS_CMD;
3073         irq_ptr->aqueue.count=DEFAULT_ACTIVATE_QS_COUNT;
3074
3075         qdio_fill_qs(irq_ptr, init_data->cdev,
3076                      init_data->no_input_qs,
3077                      init_data->no_output_qs,
3078                      init_data->input_handler,
3079                      init_data->output_handler,init_data->int_parm,
3080                      init_data->q_format,init_data->flags,
3081                      init_data->input_sbal_addr_array,
3082                      init_data->output_sbal_addr_array);
3083
3084         if (!try_module_get(THIS_MODULE)) {
3085                 QDIO_PRINT_CRIT("try_module_get() failed!\n");
3086                 qdio_release_irq_memory(irq_ptr);
3087                 return -EINVAL;
3088         }
3089
3090         qdio_fill_thresholds(irq_ptr,init_data->no_input_qs,
3091                              init_data->no_output_qs,
3092                              init_data->min_input_threshold,
3093                              init_data->max_input_threshold,
3094                              init_data->min_output_threshold,
3095                              init_data->max_output_threshold);
3096
3097         /* fill in qdr */
3098         irq_ptr->qdr->qfmt=init_data->q_format;
3099         irq_ptr->qdr->iqdcnt=init_data->no_input_qs;
3100         irq_ptr->qdr->oqdcnt=init_data->no_output_qs;
3101         irq_ptr->qdr->iqdsz=sizeof(struct qdesfmt0)/4; /* size in words */
3102         irq_ptr->qdr->oqdsz=sizeof(struct qdesfmt0)/4;
3103
3104         irq_ptr->qdr->qiba=(unsigned long)&irq_ptr->qib;
3105         irq_ptr->qdr->qkey=QDIO_STORAGE_KEY;
3106
3107         /* fill in qib */
3108         irq_ptr->is_qebsm = is_passthrough;
3109         if (irq_ptr->is_qebsm)
3110                 irq_ptr->qib.rflags |= QIB_RFLAGS_ENABLE_QEBSM;
3111
3112         irq_ptr->qib.qfmt=init_data->q_format;
3113         if (init_data->no_input_qs)
3114                 irq_ptr->qib.isliba=(unsigned long)(irq_ptr->input_qs[0]->slib);
3115         if (init_data->no_output_qs)
3116                 irq_ptr->qib.osliba=(unsigned long)(irq_ptr->output_qs[0]->slib);
3117         memcpy(irq_ptr->qib.ebcnam,init_data->adapter_name,8);
3118
3119         qdio_set_impl_params(irq_ptr,init_data->qib_param_field_format,
3120                              init_data->qib_param_field,
3121                              init_data->no_input_qs,
3122                              init_data->no_output_qs,
3123                              init_data->input_slib_elements,
3124                              init_data->output_slib_elements);
3125
3126         /* first input descriptors, then output descriptors */
3127         is_iqdio = (init_data->q_format == QDIO_IQDIO_QFMT) ? 1 : 0;
3128         for (i=0;i<init_data->no_input_qs;i++)
3129                 qdio_allocate_fill_input_desc(irq_ptr, i, is_iqdio);
3130
3131         for (i=0;i<init_data->no_output_qs;i++)
3132                 qdio_allocate_fill_output_desc(irq_ptr, i,
3133                                                init_data->no_input_qs,
3134                                                is_iqdio);
3135
3136         /* qdr, qib, sls, slsbs, slibs, sbales filled. */
3137
3138         /* get qdio commands */
3139         ciw = ccw_device_get_ciw(init_data->cdev, CIW_TYPE_EQUEUE);
3140         if (!ciw) {
3141                 QDIO_DBF_TEXT2(1,setup,"no eq");
3142                 QDIO_PRINT_INFO("No equeue CIW found for QDIO commands. "
3143                                 "Trying to use default.\n");
3144         } else
3145                 irq_ptr->equeue = *ciw;
3146         ciw = ccw_device_get_ciw(init_data->cdev, CIW_TYPE_AQUEUE);
3147         if (!ciw) {
3148                 QDIO_DBF_TEXT2(1,setup,"no aq");
3149                 QDIO_PRINT_INFO("No aqueue CIW found for QDIO commands. "
3150                                 "Trying to use default.\n");
3151         } else
3152                 irq_ptr->aqueue = *ciw;
3153
3154         /* Set new interrupt handler. */
3155         irq_ptr->original_int_handler = init_data->cdev->handler;
3156         init_data->cdev->handler = qdio_handler;
3157
3158         return 0;
3159 }
3160
3161 int
3162 qdio_establish(struct qdio_initialize *init_data)
3163 {
3164         struct qdio_irq *irq_ptr;
3165         unsigned long saveflags;
3166         int result, result2;
3167         struct ccw_device *cdev;
3168         char dbf_text[20];
3169
3170         cdev=init_data->cdev;
3171         irq_ptr = cdev->private->qdio_data;
3172         if (!irq_ptr)
3173                 return -EINVAL;
3174
3175         if (cdev->private->state != DEV_STATE_ONLINE)
3176                 return -EINVAL;
3177
3178         down(&irq_ptr->setting_up_sema);
3179
3180         qdio_fill_irq(init_data);
3181
3182         /* the thinint CHSC stuff */
3183         if (irq_ptr->is_thinint_irq) {
3184
3185                 result = tiqdio_set_subchannel_ind(irq_ptr,0);
3186                 if (result) {
3187                         up(&irq_ptr->setting_up_sema);
3188                         qdio_shutdown(cdev, QDIO_FLAG_CLEANUP_USING_CLEAR);
3189                         return result;
3190                 }
3191                 tiqdio_set_delay_target(irq_ptr,TIQDIO_DELAY_TARGET);
3192         }
3193
3194         sprintf(dbf_text,"qest%4x",cdev->private->sch_no);
3195         QDIO_DBF_TEXT0(0,setup,dbf_text);
3196         QDIO_DBF_TEXT0(0,trace,dbf_text);
3197
3198         /* establish q */
3199         irq_ptr->ccw.cmd_code=irq_ptr->equeue.cmd;
3200         irq_ptr->ccw.flags=CCW_FLAG_SLI;
3201         irq_ptr->ccw.count=irq_ptr->equeue.count;
3202         irq_ptr->ccw.cda=QDIO_GET_ADDR(irq_ptr->qdr);
3203
3204         spin_lock_irqsave(get_ccwdev_lock(cdev),saveflags);
3205
3206         ccw_device_set_options(cdev, 0);
3207         result=ccw_device_start_timeout(cdev,&irq_ptr->ccw,
3208                                         QDIO_DOING_ESTABLISH,0, 0,
3209                                         QDIO_ESTABLISH_TIMEOUT);
3210         if (result) {
3211                 result2=ccw_device_start_timeout(cdev,&irq_ptr->ccw,
3212                                                  QDIO_DOING_ESTABLISH,0,0,
3213                                                  QDIO_ESTABLISH_TIMEOUT);
3214                 sprintf(dbf_text,"eq:io%4x",result);
3215                 QDIO_DBF_TEXT2(1,setup,dbf_text);
3216                 if (result2) {
3217                         sprintf(dbf_text,"eq:io%4x",result);
3218                         QDIO_DBF_TEXT2(1,setup,dbf_text);
3219                 }
3220                 QDIO_PRINT_WARN("establish queues on irq 0.%x.%04x: do_IO " \
3221                                 "returned %i, next try returned %i\n",
3222                                 irq_ptr->schid.ssid, irq_ptr->schid.sch_no,
3223                                 result, result2);
3224                 result=result2;
3225                 if (result)
3226                         ccw_device_set_timeout(cdev, 0);
3227         }
3228
3229         spin_unlock_irqrestore(get_ccwdev_lock(cdev),saveflags);
3230
3231         if (result) {
3232                 up(&irq_ptr->setting_up_sema);
3233                 qdio_shutdown(cdev,QDIO_FLAG_CLEANUP_USING_CLEAR);
3234                 return result;
3235         }
3236
3237         /* Timeout is cared for already by using ccw_device_start_timeout(). */
3238         wait_event_interruptible(cdev->private->wait_q,
3239                  irq_ptr->state == QDIO_IRQ_STATE_ESTABLISHED ||
3240                  irq_ptr->state == QDIO_IRQ_STATE_ERR);
3241
3242         if (irq_ptr->state == QDIO_IRQ_STATE_ESTABLISHED)
3243                 result = 0;
3244         else {
3245                 up(&irq_ptr->setting_up_sema);
3246                 qdio_shutdown(cdev, QDIO_FLAG_CLEANUP_USING_CLEAR);
3247                 return -EIO;
3248         }
3249
3250         qdio_get_ssqd_information(irq_ptr);
3251         /* if this gets set once, we're running under VM and can omit SVSes */
3252         if (irq_ptr->qdioac&CHSC_FLAG_SIGA_SYNC_NECESSARY)
3253                 omit_svs=1;
3254
3255         sprintf(dbf_text,"qdioac%2x",irq_ptr->qdioac);
3256         QDIO_DBF_TEXT2(0,setup,dbf_text);
3257
3258         sprintf(dbf_text,"qib ac%2x",irq_ptr->qib.ac);
3259         QDIO_DBF_TEXT2(0,setup,dbf_text);
3260
3261         irq_ptr->hydra_gives_outbound_pcis=
3262                 irq_ptr->qib.ac&QIB_AC_OUTBOUND_PCI_SUPPORTED;
3263         irq_ptr->sync_done_on_outb_pcis=
3264                 irq_ptr->qdioac&CHSC_FLAG_SIGA_SYNC_DONE_ON_OUTB_PCIS;
3265
3266         qdio_initialize_set_siga_flags_input(irq_ptr);
3267         qdio_initialize_set_siga_flags_output(irq_ptr);
3268
3269         up(&irq_ptr->setting_up_sema);
3270
3271         return result;
3272
3273 }
3274
3275 int
3276 qdio_activate(struct ccw_device *cdev, int flags)
3277 {
3278         struct qdio_irq *irq_ptr;
3279         int i,result=0,result2;
3280         unsigned long saveflags;
3281         char dbf_text[20]; /* see qdio_initialize */
3282
3283         irq_ptr = cdev->private->qdio_data;
3284         if (!irq_ptr)
3285                 return -ENODEV;
3286
3287         if (cdev->private->state != DEV_STATE_ONLINE)
3288                 return -EINVAL;
3289
3290         down(&irq_ptr->setting_up_sema);
3291         if (irq_ptr->state==QDIO_IRQ_STATE_INACTIVE) {
3292                 result=-EBUSY;
3293                 goto out;
3294         }
3295
3296         sprintf(dbf_text,"qact%4x", irq_ptr->schid.sch_no);
3297         QDIO_DBF_TEXT2(0,setup,dbf_text);
3298         QDIO_DBF_TEXT2(0,trace,dbf_text);
3299
3300         /* activate q */
3301         irq_ptr->ccw.cmd_code=irq_ptr->aqueue.cmd;
3302         irq_ptr->ccw.flags=CCW_FLAG_SLI;
3303         irq_ptr->ccw.count=irq_ptr->aqueue.count;
3304         irq_ptr->ccw.cda=QDIO_GET_ADDR(0);
3305
3306         spin_lock_irqsave(get_ccwdev_lock(cdev),saveflags);
3307
3308         ccw_device_set_timeout(cdev, 0);
3309         ccw_device_set_options(cdev, CCWDEV_REPORT_ALL);
3310         result=ccw_device_start(cdev,&irq_ptr->ccw,QDIO_DOING_ACTIVATE,
3311                                 0, DOIO_DENY_PREFETCH);
3312         if (result) {
3313                 result2=ccw_device_start(cdev,&irq_ptr->ccw,
3314                                          QDIO_DOING_ACTIVATE,0,0);
3315                 sprintf(dbf_text,"aq:io%4x",result);
3316                 QDIO_DBF_TEXT2(1,setup,dbf_text);
3317                 if (result2) {
3318                         sprintf(dbf_text,"aq:io%4x",result);
3319                         QDIO_DBF_TEXT2(1,setup,dbf_text);
3320                 }
3321                 QDIO_PRINT_WARN("activate queues on irq 0.%x.%04x: do_IO " \
3322                                 "returned %i, next try returned %i\n",
3323                                 irq_ptr->schid.ssid, irq_ptr->schid.sch_no,
3324                                 result, result2);
3325                 result=result2;
3326         }
3327
3328         spin_unlock_irqrestore(get_ccwdev_lock(cdev),saveflags);
3329         if (result)
3330                 goto out;
3331
3332         for (i=0;i<irq_ptr->no_input_qs;i++) {
3333                 if (irq_ptr->is_thinint_irq) {
3334                         /*
3335                          * that way we know, that, if we will get interrupted
3336                          * by tiqdio_inbound_processing, qdio_unmark_q will
3337                          * not be called
3338                          */
3339                         qdio_reserve_q(irq_ptr->input_qs[i]);
3340                         qdio_mark_tiq(irq_ptr->input_qs[i]);
3341                         qdio_release_q(irq_ptr->input_qs[i]);
3342                 }
3343         }
3344
3345         if (flags&QDIO_FLAG_NO_INPUT_INTERRUPT_CONTEXT) {
3346                 for (i=0;i<irq_ptr->no_input_qs;i++) {
3347                         irq_ptr->input_qs[i]->is_input_q|=
3348                                 QDIO_FLAG_NO_INPUT_INTERRUPT_CONTEXT;
3349                 }
3350         }
3351
3352         wait_event_interruptible_timeout(cdev->private->wait_q,
3353                                          ((irq_ptr->state ==
3354                                           QDIO_IRQ_STATE_STOPPED) ||
3355                                           (irq_ptr->state ==
3356                                            QDIO_IRQ_STATE_ERR)),
3357                                          QDIO_ACTIVATE_TIMEOUT);
3358
3359         switch (irq_ptr->state) {
3360         case QDIO_IRQ_STATE_STOPPED:
3361         case QDIO_IRQ_STATE_ERR:
3362                 up(&irq_ptr->setting_up_sema);
3363                 qdio_shutdown(cdev, QDIO_FLAG_CLEANUP_USING_CLEAR);
3364                 down(&irq_ptr->setting_up_sema);
3365                 result = -EIO;
3366                 break;
3367         default:
3368                 qdio_set_state(irq_ptr, QDIO_IRQ_STATE_ACTIVE);
3369                 result = 0;
3370         }
3371  out:
3372         up(&irq_ptr->setting_up_sema);
3373
3374         return result;
3375 }
3376
3377 /* buffers filled forwards again to make Rick happy */
3378 static inline void
3379 qdio_do_qdio_fill_input(struct qdio_q *q, unsigned int qidx,
3380                         unsigned int count, struct qdio_buffer *buffers)
3381 {
3382         struct qdio_irq *irq = (struct qdio_irq *) q->irq_ptr;
3383         qidx &= (QDIO_MAX_BUFFERS_PER_Q - 1);
3384         if (irq->is_qebsm) {
3385                 while (count)
3386                         set_slsb(q, &qidx, SLSB_CU_INPUT_EMPTY, &count);
3387                 return;
3388         }
3389         for (;;) {
3390                 set_slsb(q, &qidx, SLSB_CU_INPUT_EMPTY, &count);
3391                 count--;
3392                 if (!count) break;
3393                 qidx = (qidx + 1) & (QDIO_MAX_BUFFERS_PER_Q - 1);
3394         }
3395 }
3396
3397 static inline void
3398 qdio_do_qdio_fill_output(struct qdio_q *q, unsigned int qidx,
3399                          unsigned int count, struct qdio_buffer *buffers)
3400 {
3401         struct qdio_irq *irq = (struct qdio_irq *) q->irq_ptr;
3402
3403         qidx &= (QDIO_MAX_BUFFERS_PER_Q - 1);
3404         if (irq->is_qebsm) {
3405                 while (count)
3406                         set_slsb(q, &qidx, SLSB_CU_OUTPUT_PRIMED, &count);
3407                 return;
3408         }
3409
3410         for (;;) {
3411                 set_slsb(q, &qidx, SLSB_CU_OUTPUT_PRIMED, &count);
3412                 count--;
3413                 if (!count) break;
3414                 qidx = (qidx + 1) & (QDIO_MAX_BUFFERS_PER_Q - 1);
3415         }
3416 }
3417
3418 static inline void
3419 do_qdio_handle_inbound(struct qdio_q *q, unsigned int callflags,
3420                        unsigned int qidx, unsigned int count,
3421                        struct qdio_buffer *buffers)
3422 {
3423         int used_elements;
3424
3425         /* This is the inbound handling of queues */
3426         used_elements=atomic_add_return(count, &q->number_of_buffers_used) - count;
3427
3428         qdio_do_qdio_fill_input(q,qidx,count,buffers);
3429
3430         if ((used_elements+count==QDIO_MAX_BUFFERS_PER_Q)&&
3431             (callflags&QDIO_FLAG_UNDER_INTERRUPT))
3432                 atomic_swap(&q->polling,0);
3433
3434         if (used_elements)
3435                 return;
3436         if (callflags&QDIO_FLAG_DONT_SIGA)
3437                 return;
3438         if (q->siga_in) {
3439                 int result;
3440
3441                 result=qdio_siga_input(q);
3442                 if (result) {
3443                         if (q->siga_error)
3444                                 q->error_status_flags|=
3445                                         QDIO_STATUS_MORE_THAN_ONE_SIGA_ERROR;
3446                         q->error_status_flags|=QDIO_STATUS_LOOK_FOR_ERROR;
3447                         q->siga_error=result;
3448                 }
3449         }
3450
3451         qdio_mark_q(q);
3452 }
3453
3454 static inline void
3455 do_qdio_handle_outbound(struct qdio_q *q, unsigned int callflags,
3456                         unsigned int qidx, unsigned int count,
3457                         struct qdio_buffer *buffers)
3458 {
3459         int used_elements;
3460         unsigned int cnt, start_buf;
3461         unsigned char state = 0;
3462         struct qdio_irq *irq = (struct qdio_irq *) q->irq_ptr;
3463
3464         /* This is the outbound handling of queues */
3465 #ifdef QDIO_PERFORMANCE_STATS
3466         perf_stats.start_time_outbound=NOW;
3467 #endif /* QDIO_PERFORMANCE_STATS */
3468
3469         qdio_do_qdio_fill_output(q,qidx,count,buffers);
3470
3471         used_elements=atomic_add_return(count, &q->number_of_buffers_used) - count;
3472
3473         if (callflags&QDIO_FLAG_DONT_SIGA) {
3474 #ifdef QDIO_PERFORMANCE_STATS
3475                 perf_stats.outbound_time+=NOW-perf_stats.start_time_outbound;
3476                 perf_stats.outbound_cnt++;
3477 #endif /* QDIO_PERFORMANCE_STATS */
3478                 return;
3479         }
3480         if (q->is_iqdio_q) {
3481                 /* one siga for every sbal */
3482                 while (count--)
3483                         qdio_kick_outbound_q(q);
3484
3485                 __qdio_outbound_processing(q);
3486         } else {
3487                 /* under VM, we do a SIGA sync unconditionally */
3488                 SYNC_MEMORY;
3489                 else {
3490                         /*
3491                          * w/o shadow queues (else branch of
3492                          * SYNC_MEMORY :-/ ), we try to
3493                          * fast-requeue buffers
3494                          */
3495                         if (irq->is_qebsm) {
3496                                 cnt = 1;
3497                                 start_buf = ((qidx+QDIO_MAX_BUFFERS_PER_Q-1) &
3498                                              (QDIO_MAX_BUFFERS_PER_Q-1));
3499                                 qdio_do_eqbs(q, &state, &start_buf, &cnt);
3500                         } else
3501                                 state = q->slsb.acc.val[(qidx+QDIO_MAX_BUFFERS_PER_Q-1)
3502                                         &(QDIO_MAX_BUFFERS_PER_Q-1) ];
3503                          if (state != SLSB_CU_OUTPUT_PRIMED) {
3504                                 qdio_kick_outbound_q(q);
3505                         } else {
3506                                 QDIO_DBF_TEXT3(0,trace, "fast-req");
3507 #ifdef QDIO_PERFORMANCE_STATS
3508                                 perf_stats.fast_reqs++;
3509 #endif /* QDIO_PERFORMANCE_STATS */
3510                         }
3511                 }
3512                 /*
3513                  * only marking the q could take too long,
3514                  * the upper layer module could do a lot of
3515                  * traffic in that time
3516                  */
3517                 __qdio_outbound_processing(q);
3518         }
3519
3520 #ifdef QDIO_PERFORMANCE_STATS
3521         perf_stats.outbound_time+=NOW-perf_stats.start_time_outbound;
3522         perf_stats.outbound_cnt++;
3523 #endif /* QDIO_PERFORMANCE_STATS */
3524 }
3525
3526 /* count must be 1 in iqdio */
3527 int
3528 do_QDIO(struct ccw_device *cdev,unsigned int callflags,
3529         unsigned int queue_number, unsigned int qidx,
3530         unsigned int count,struct qdio_buffer *buffers)
3531 {
3532         struct qdio_irq *irq_ptr;
3533 #ifdef CONFIG_QDIO_DEBUG
3534         char dbf_text[20];
3535
3536         sprintf(dbf_text,"doQD%04x",cdev->private->sch_no);
3537         QDIO_DBF_TEXT3(0,trace,dbf_text);
3538 #endif /* CONFIG_QDIO_DEBUG */
3539
3540         if ( (qidx>QDIO_MAX_BUFFERS_PER_Q) ||
3541              (count>QDIO_MAX_BUFFERS_PER_Q) ||
3542              (queue_number>QDIO_MAX_QUEUES_PER_IRQ) )
3543                 return -EINVAL;
3544
3545         if (count==0)
3546                 return 0;
3547
3548         irq_ptr = cdev->private->qdio_data;
3549         if (!irq_ptr)
3550                 return -ENODEV;
3551
3552 #ifdef CONFIG_QDIO_DEBUG
3553         if (callflags&QDIO_FLAG_SYNC_INPUT)
3554                 QDIO_DBF_HEX3(0,trace,&irq_ptr->input_qs[queue_number],
3555                               sizeof(void*));
3556         else
3557                 QDIO_DBF_HEX3(0,trace,&irq_ptr->output_qs[queue_number],
3558                               sizeof(void*));
3559         sprintf(dbf_text,"flag%04x",callflags);
3560         QDIO_DBF_TEXT3(0,trace,dbf_text);
3561         sprintf(dbf_text,"qi%02xct%02x",qidx,count);
3562         QDIO_DBF_TEXT3(0,trace,dbf_text);
3563 #endif /* CONFIG_QDIO_DEBUG */
3564
3565         if (irq_ptr->state!=QDIO_IRQ_STATE_ACTIVE)
3566                 return -EBUSY;
3567
3568         if (callflags&QDIO_FLAG_SYNC_INPUT)
3569                 do_qdio_handle_inbound(irq_ptr->input_qs[queue_number],
3570                                        callflags, qidx, count, buffers);
3571         else if (callflags&QDIO_FLAG_SYNC_OUTPUT)
3572                 do_qdio_handle_outbound(irq_ptr->output_qs[queue_number],
3573                                         callflags, qidx, count, buffers);
3574         else {
3575                 QDIO_DBF_TEXT3(1,trace,"doQD:inv");
3576                 return -EINVAL;
3577         }
3578         return 0;
3579 }
3580
3581 #ifdef QDIO_PERFORMANCE_STATS
3582 static int
3583 qdio_perf_procfile_read(char *buffer, char **buffer_location, off_t offset,
3584                         int buffer_length, int *eof, void *data)
3585 {
3586         int c=0;
3587
3588         /* we are always called with buffer_length=4k, so we all
3589            deliver on the first read */
3590         if (offset>0)
3591                 return 0;
3592
3593 #define _OUTP_IT(x...) c+=sprintf(buffer+c,x)
3594         _OUTP_IT("i_p_nc/c=%lu/%lu\n",i_p_nc,i_p_c);
3595         _OUTP_IT("ii_p_nc/c=%lu/%lu\n",ii_p_nc,ii_p_c);
3596         _OUTP_IT("o_p_nc/c=%lu/%lu\n",o_p_nc,o_p_c);
3597         _OUTP_IT("Number of tasklet runs (total)                  : %u\n",
3598                  perf_stats.tl_runs);
3599         _OUTP_IT("\n");
3600         _OUTP_IT("Number of SIGA sync's issued                    : %u\n",
3601                  perf_stats.siga_syncs);
3602         _OUTP_IT("Number of SIGA in's issued                      : %u\n",
3603                  perf_stats.siga_ins);
3604         _OUTP_IT("Number of SIGA out's issued                     : %u\n",
3605                  perf_stats.siga_outs);
3606         _OUTP_IT("Number of PCIs caught                           : %u\n",
3607                  perf_stats.pcis);
3608         _OUTP_IT("Number of adapter interrupts caught             : %u\n",
3609                  perf_stats.thinints);
3610         _OUTP_IT("Number of fast requeues (outg. SBALs w/o SIGA)  : %u\n",
3611                  perf_stats.fast_reqs);
3612         _OUTP_IT("\n");
3613         _OUTP_IT("Total time of all inbound actions (us) incl. UL : %u\n",
3614                  perf_stats.inbound_time);
3615         _OUTP_IT("Number of inbound transfers                     : %u\n",
3616                  perf_stats.inbound_cnt);
3617         _OUTP_IT("Total time of all outbound do_QDIOs (us)        : %u\n",
3618                  perf_stats.outbound_time);
3619         _OUTP_IT("Number of do_QDIOs outbound                     : %u\n",
3620                  perf_stats.outbound_cnt);
3621         _OUTP_IT("\n");
3622
3623         return c;
3624 }
3625
3626 static struct proc_dir_entry *qdio_perf_proc_file;
3627 #endif /* QDIO_PERFORMANCE_STATS */
3628
3629 static void
3630 qdio_add_procfs_entry(void)
3631 {
3632 #ifdef QDIO_PERFORMANCE_STATS
3633         proc_perf_file_registration=0;
3634         qdio_perf_proc_file=create_proc_entry(QDIO_PERF,
3635                                               S_IFREG|0444,&proc_root);
3636         if (qdio_perf_proc_file) {
3637                 qdio_perf_proc_file->read_proc=&qdio_perf_procfile_read;
3638         } else proc_perf_file_registration=-1;
3639
3640         if (proc_perf_file_registration)
3641                 QDIO_PRINT_WARN("was not able to register perf. " \
3642                                 "proc-file (%i).\n",
3643                                 proc_perf_file_registration);
3644 #endif /* QDIO_PERFORMANCE_STATS */
3645 }
3646
3647 static void
3648 qdio_remove_procfs_entry(void)
3649 {
3650 #ifdef QDIO_PERFORMANCE_STATS
3651         perf_stats.tl_runs=0;
3652
3653         if (!proc_perf_file_registration) /* means if it went ok earlier */
3654                 remove_proc_entry(QDIO_PERF,&proc_root);
3655 #endif /* QDIO_PERFORMANCE_STATS */
3656 }
3657
3658 static void
3659 tiqdio_register_thinints(void)
3660 {
3661         char dbf_text[20];
3662         register_thinint_result=
3663                 s390_register_adapter_interrupt(&tiqdio_thinint_handler);
3664         if (register_thinint_result) {
3665                 sprintf(dbf_text,"regthn%x",(register_thinint_result&0xff));
3666                 QDIO_DBF_TEXT0(0,setup,dbf_text);
3667                 QDIO_PRINT_ERR("failed to register adapter handler " \
3668                                "(rc=%i).\nAdapter interrupts might " \
3669                                "not work. Continuing.\n",
3670                                register_thinint_result);
3671         }
3672 }
3673
3674 static void
3675 tiqdio_unregister_thinints(void)
3676 {
3677         if (!register_thinint_result)
3678                 s390_unregister_adapter_interrupt(&tiqdio_thinint_handler);
3679 }
3680
3681 static int
3682 qdio_get_qdio_memory(void)
3683 {
3684         int i;
3685         indicator_used[0]=1;
3686
3687         for (i=1;i<INDICATORS_PER_CACHELINE;i++)
3688                 indicator_used[i]=0;
3689         indicators=(__u32*)kmalloc(sizeof(__u32)*(INDICATORS_PER_CACHELINE),
3690                                    GFP_KERNEL);
3691         if (!indicators) return -ENOMEM;
3692         memset(indicators,0,sizeof(__u32)*(INDICATORS_PER_CACHELINE));
3693         return 0;
3694 }
3695
3696 static void
3697 qdio_release_qdio_memory(void)
3698 {
3699         kfree(indicators);
3700 }
3701
3702 static void
3703 qdio_unregister_dbf_views(void)
3704 {
3705         if (qdio_dbf_setup)
3706                 debug_unregister(qdio_dbf_setup);
3707         if (qdio_dbf_sbal)
3708                 debug_unregister(qdio_dbf_sbal);
3709         if (qdio_dbf_sense)
3710                 debug_unregister(qdio_dbf_sense);
3711         if (qdio_dbf_trace)
3712                 debug_unregister(qdio_dbf_trace);
3713 #ifdef CONFIG_QDIO_DEBUG
3714         if (qdio_dbf_slsb_out)
3715                 debug_unregister(qdio_dbf_slsb_out);
3716         if (qdio_dbf_slsb_in)
3717                 debug_unregister(qdio_dbf_slsb_in);
3718 #endif /* CONFIG_QDIO_DEBUG */
3719 }
3720
3721 static int
3722 qdio_register_dbf_views(void)
3723 {
3724         qdio_dbf_setup=debug_register(QDIO_DBF_SETUP_NAME,
3725                                       QDIO_DBF_SETUP_PAGES,
3726                                       QDIO_DBF_SETUP_NR_AREAS,
3727                                       QDIO_DBF_SETUP_LEN);
3728         if (!qdio_dbf_setup)
3729                 goto oom;
3730         debug_register_view(qdio_dbf_setup,&debug_hex_ascii_view);
3731         debug_set_level(qdio_dbf_setup,QDIO_DBF_SETUP_LEVEL);
3732
3733         qdio_dbf_sbal=debug_register(QDIO_DBF_SBAL_NAME,
3734                                      QDIO_DBF_SBAL_PAGES,
3735                                      QDIO_DBF_SBAL_NR_AREAS,
3736                                      QDIO_DBF_SBAL_LEN);
3737         if (!qdio_dbf_sbal)
3738                 goto oom;
3739
3740         debug_register_view(qdio_dbf_sbal,&debug_hex_ascii_view);
3741         debug_set_level(qdio_dbf_sbal,QDIO_DBF_SBAL_LEVEL);
3742
3743         qdio_dbf_sense=debug_register(QDIO_DBF_SENSE_NAME,
3744                                       QDIO_DBF_SENSE_PAGES,
3745                                       QDIO_DBF_SENSE_NR_AREAS,
3746                                       QDIO_DBF_SENSE_LEN);
3747         if (!qdio_dbf_sense)
3748                 goto oom;
3749
3750         debug_register_view(qdio_dbf_sense,&debug_hex_ascii_view);
3751         debug_set_level(qdio_dbf_sense,QDIO_DBF_SENSE_LEVEL);
3752
3753         qdio_dbf_trace=debug_register(QDIO_DBF_TRACE_NAME,
3754                                       QDIO_DBF_TRACE_PAGES,
3755                                       QDIO_DBF_TRACE_NR_AREAS,
3756                                       QDIO_DBF_TRACE_LEN);
3757         if (!qdio_dbf_trace)
3758                 goto oom;
3759
3760         debug_register_view(qdio_dbf_trace,&debug_hex_ascii_view);
3761         debug_set_level(qdio_dbf_trace,QDIO_DBF_TRACE_LEVEL);
3762
3763 #ifdef CONFIG_QDIO_DEBUG
3764         qdio_dbf_slsb_out=debug_register(QDIO_DBF_SLSB_OUT_NAME,
3765                                          QDIO_DBF_SLSB_OUT_PAGES,
3766                                          QDIO_DBF_SLSB_OUT_NR_AREAS,
3767                                          QDIO_DBF_SLSB_OUT_LEN);
3768         if (!qdio_dbf_slsb_out)
3769                 goto oom;
3770         debug_register_view(qdio_dbf_slsb_out,&debug_hex_ascii_view);
3771         debug_set_level(qdio_dbf_slsb_out,QDIO_DBF_SLSB_OUT_LEVEL);
3772
3773         qdio_dbf_slsb_in=debug_register(QDIO_DBF_SLSB_IN_NAME,
3774                                         QDIO_DBF_SLSB_IN_PAGES,
3775                                         QDIO_DBF_SLSB_IN_NR_AREAS,
3776                                         QDIO_DBF_SLSB_IN_LEN);
3777         if (!qdio_dbf_slsb_in)
3778                 goto oom;
3779         debug_register_view(qdio_dbf_slsb_in,&debug_hex_ascii_view);
3780         debug_set_level(qdio_dbf_slsb_in,QDIO_DBF_SLSB_IN_LEVEL);
3781 #endif /* CONFIG_QDIO_DEBUG */
3782         return 0;
3783 oom:
3784         QDIO_PRINT_ERR("not enough memory for dbf.\n");
3785         qdio_unregister_dbf_views();
3786         return -ENOMEM;
3787 }
3788
3789 static int __init
3790 init_QDIO(void)
3791 {
3792         int res;
3793 #ifdef QDIO_PERFORMANCE_STATS
3794         void *ptr;
3795 #endif /* QDIO_PERFORMANCE_STATS */
3796
3797         printk("qdio: loading %s\n",version);
3798
3799         res=qdio_get_qdio_memory();
3800         if (res)
3801                 return res;
3802
3803         res = qdio_register_dbf_views();
3804         if (res)
3805                 return res;
3806
3807         QDIO_DBF_TEXT0(0,setup,"initQDIO");
3808
3809 #ifdef QDIO_PERFORMANCE_STATS
3810         memset((void*)&perf_stats,0,sizeof(perf_stats));
3811         QDIO_DBF_TEXT0(0,setup,"perfstat");
3812         ptr=&perf_stats;
3813         QDIO_DBF_HEX0(0,setup,&ptr,sizeof(void*));
3814 #endif /* QDIO_PERFORMANCE_STATS */
3815
3816         qdio_add_procfs_entry();
3817
3818         if (tiqdio_check_chsc_availability())
3819                 QDIO_PRINT_ERR("Not all CHSCs supported. Continuing.\n");
3820
3821         tiqdio_register_thinints();
3822
3823         return 0;
3824  }
3825
3826 static void __exit
3827 cleanup_QDIO(void)
3828 {
3829         tiqdio_unregister_thinints();
3830         qdio_remove_procfs_entry();
3831         qdio_release_qdio_memory();
3832         qdio_unregister_dbf_views();
3833
3834         printk("qdio: %s: module removed\n",version);
3835 }
3836
3837 module_init(init_QDIO);
3838 module_exit(cleanup_QDIO);
3839
3840 EXPORT_SYMBOL(qdio_allocate);
3841 EXPORT_SYMBOL(qdio_establish);
3842 EXPORT_SYMBOL(qdio_initialize);
3843 EXPORT_SYMBOL(qdio_activate);
3844 EXPORT_SYMBOL(do_QDIO);
3845 EXPORT_SYMBOL(qdio_shutdown);
3846 EXPORT_SYMBOL(qdio_free);
3847 EXPORT_SYMBOL(qdio_cleanup);
3848 EXPORT_SYMBOL(qdio_synchronize);