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         ccq = do_eqbs(irq->sch_token, state, q_no, start, cnt);
 169         rc = qdio_check_ccq(q, ccq);
 170         if (rc < 0) {
 171                 QDIO_DBF_TEXT2(1,trace,"eqberr");
 172                 sprintf(dbf_text,"%2x,%2x,%d,%d",tmp_cnt, *cnt, ccq, q_no);
 173                 QDIO_DBF_TEXT2(1,trace,dbf_text);
 174                 q->handler(q->cdev,QDIO_STATUS_ACTIVATE_CHECK_CONDITION|
 175                                 QDIO_STATUS_LOOK_FOR_ERROR,
 176                                 0, 0, 0, -1, -1, q->int_parm);
 177                 return 0;
 178         }
 179         return (tmp_cnt - *cnt);
 180 }
 181
 182 /* SQBS: set buffer states */
 183 static inline int
 184 qdio_do_sqbs(struct qdio_q *q, unsigned char state,
 185              unsigned int *start, unsigned int *cnt)
 186 {
 187         struct qdio_irq *irq;
 188         unsigned int tmp_cnt, q_no, ccq;
 189         int rc;
 190         char dbf_text[15];
 191
 192         ccq = 0;
 193         tmp_cnt = *cnt;
 194         irq = (struct qdio_irq*)q->irq_ptr;
 195         q_no = q->q_no;
 196         if(!q->is_input_q)
 197                 q_no += irq->no_input_qs;
 198         ccq = do_sqbs(irq->sch_token, state, q_no, start, cnt);
 199         rc = qdio_check_ccq(q, ccq);
 200         if (rc < 0) {
 201                 QDIO_DBF_TEXT3(1,trace,"sqberr");
 202                 sprintf(dbf_text,"%2x,%2x,%d,%d",tmp_cnt,*cnt,ccq,q_no);
 203                 QDIO_DBF_TEXT3(1,trace,dbf_text);
 204                 q->handler(q->cdev,QDIO_STATUS_ACTIVATE_CHECK_CONDITION|
 205                                 QDIO_STATUS_LOOK_FOR_ERROR,
 206                                 0, 0, 0, -1, -1, q->int_parm);
 207                 return 0;
 208         }
 209         return (tmp_cnt - *cnt);
 210 }
 211
 212 static inline int
 213 qdio_set_slsb(struct qdio_q *q, unsigned int *bufno,
 214               unsigned char state, unsigned int *count)
 215 {
 216         volatile char *slsb;
 217         struct qdio_irq *irq;
 218
 219         irq = (struct qdio_irq*)q->irq_ptr;
 220         if (!irq->is_qebsm) {
 221                 slsb = (char *)&q->slsb.acc.val[(*bufno)];
 222                 xchg(slsb, state);
 223                 return 1;
 224         }
 225         return qdio_do_sqbs(q, state, bufno, count);
 226 }
 227
 228 #ifdef CONFIG_QDIO_DEBUG
 229 static inline void
 230 qdio_trace_slsb(struct qdio_q *q)
 231 {
 232         if (q->queue_type==QDIO_TRACE_QTYPE) {
 233                 if (q->is_input_q)
 234                         QDIO_DBF_HEX2(0,slsb_in,&q->slsb,
 235                                       QDIO_MAX_BUFFERS_PER_Q);
 236                 else
 237                         QDIO_DBF_HEX2(0,slsb_out,&q->slsb,
 238                                       QDIO_MAX_BUFFERS_PER_Q);
 239         }
 240 }
 241 #endif
 242
 243 static inline int
 244 set_slsb(struct qdio_q *q, unsigned int *bufno,
 245          unsigned char state, unsigned int *count)
 246 {
 247         int rc;
 248 #ifdef CONFIG_QDIO_DEBUG
 249         qdio_trace_slsb(q);
 250 #endif
 251         rc = qdio_set_slsb(q, bufno, state, count);
 252 #ifdef CONFIG_QDIO_DEBUG
 253         qdio_trace_slsb(q);
 254 #endif
 255         return rc;
 256 }
 257 static inline int
 258 qdio_siga_sync(struct qdio_q *q, unsigned int gpr2,
 259                unsigned int gpr3)
 260 {
 261         int cc;
 262
 263         QDIO_DBF_TEXT4(0,trace,"sigasync");
 264         QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
 265
 266 #ifdef QDIO_PERFORMANCE_STATS
 267         perf_stats.siga_syncs++;
 268 #endif /* QDIO_PERFORMANCE_STATS */
 269
 270         cc = do_siga_sync(q->schid, gpr2, gpr3);
 271         if (cc)
 272                 QDIO_DBF_HEX3(0,trace,&cc,sizeof(int*));
 273
 274         return cc;
 275 }
 276
 277 static inline int
 278 qdio_siga_sync_q(struct qdio_q *q)
 279 {
 280         if (q->is_input_q)
 281                 return qdio_siga_sync(q, 0, q->mask);
 282         return qdio_siga_sync(q, q->mask, 0);
 283 }
 284
 285 static int
 286 __do_siga_output(struct qdio_q *q, unsigned int *busy_bit)
 287 {
 288        struct qdio_irq *irq;
 289        unsigned int fc = 0;
 290        unsigned long schid;
 291
 292        irq = (struct qdio_irq *) q->irq_ptr;
 293        if (!irq->is_qebsm)
 294                schid = *((u32 *)&q->schid);
 295        else {
 296                schid = irq->sch_token;
 297                fc |= 0x80;
 298        }
 299        return do_siga_output(schid, q->mask, busy_bit, fc);
 300 }
 301
 302 /*
 303  * returns QDIO_SIGA_ERROR_ACCESS_EXCEPTION as cc, when SIGA returns
 304  * an access exception
 305  */
 306 static inline int
 307 qdio_siga_output(struct qdio_q *q)
 308 {
 309         int cc;
 310         __u32 busy_bit;
 311         __u64 start_time=0;
 312
 313 #ifdef QDIO_PERFORMANCE_STATS
 314         perf_stats.siga_outs++;
 315 #endif /* QDIO_PERFORMANCE_STATS */
 316
 317         QDIO_DBF_TEXT4(0,trace,"sigaout");
 318         QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
 319
 320         for (;;) {
 321                 cc = __do_siga_output(q, &busy_bit);
 322 //QDIO_PRINT_ERR("cc=%x, busy=%x\n",cc,busy_bit);
 323                 if ((cc==2) && (busy_bit) && (q->is_iqdio_q)) {
 324                         if (!start_time)
 325                                 start_time=NOW;
 326                         if ((NOW-start_time)>QDIO_BUSY_BIT_PATIENCE)
 327                                 break;
 328                 } else
 329                         break;
 330         }
 331
 332         if ((cc==2) && (busy_bit))
 333                 cc |= QDIO_SIGA_ERROR_B_BIT_SET;
 334
 335         if (cc)
 336                 QDIO_DBF_HEX3(0,trace,&cc,sizeof(int*));
 337
 338         return cc;
 339 }
 340
 341 static inline int
 342 qdio_siga_input(struct qdio_q *q)
 343 {
 344         int cc;
 345
 346         QDIO_DBF_TEXT4(0,trace,"sigain");
 347         QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
 348
 349 #ifdef QDIO_PERFORMANCE_STATS
 350         perf_stats.siga_ins++;
 351 #endif /* QDIO_PERFORMANCE_STATS */
 352
 353         cc = do_siga_input(q->schid, q->mask);
 354
 355         if (cc)
 356                 QDIO_DBF_HEX3(0,trace,&cc,sizeof(int*));
 357
 358         return cc;
 359 }
 360
 361 /* locked by the locks in qdio_activate and qdio_cleanup */
 362 static __u32 *
 363 qdio_get_indicator(void)
 364 {
 365         int i;
 366
 367         for (i=1;i<INDICATORS_PER_CACHELINE;i++)
 368                 if (!indicator_used[i]) {
 369                         indicator_used[i]=1;
 370                         return indicators+i;
 371                 }
 372         atomic_inc(&spare_indicator_usecount);
 373         return (__u32 * volatile) &spare_indicator;
 374 }
 375
 376 /* locked by the locks in qdio_activate and qdio_cleanup */
 377 static void
 378 qdio_put_indicator(__u32 *addr)
 379 {
 380         int i;
 381
 382         if ( (addr) && (addr!=&spare_indicator) ) {
 383                 i=addr-indicators;
 384                 indicator_used[i]=0;
 385         }
 386         if (addr == &spare_indicator)
 387                 atomic_dec(&spare_indicator_usecount);
 388 }
 389
 390 static inline void
 391 tiqdio_clear_summary_bit(__u32 *location)
 392 {
 393         QDIO_DBF_TEXT5(0,trace,"clrsummb");
 394         QDIO_DBF_HEX5(0,trace,&location,sizeof(void*));
 395
 396         xchg(location,0);
 397 }
 398
 399 static inline  void
 400 tiqdio_set_summary_bit(__u32 *location)
 401 {
 402         QDIO_DBF_TEXT5(0,trace,"setsummb");
 403         QDIO_DBF_HEX5(0,trace,&location,sizeof(void*));
 404
 405         xchg(location,-1);
 406 }
 407
 408 static inline void
 409 tiqdio_sched_tl(void)
 410 {
 411         tasklet_hi_schedule(&tiqdio_tasklet);
 412 }
 413
 414 static inline void
 415 qdio_mark_tiq(struct qdio_q *q)
 416 {
 417         unsigned long flags;
 418
 419         QDIO_DBF_TEXT4(0,trace,"mark iq");
 420         QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
 421
 422         spin_lock_irqsave(&ttiq_list_lock,flags);
 423         if (unlikely(atomic_read(&q->is_in_shutdown)))
 424                 goto out_unlock;
 425
 426         if (!q->is_input_q)
 427                 goto out_unlock;
 428
 429         if ((q->list_prev) || (q->list_next))
 430                 goto out_unlock;
 431
 432         if (!tiq_list) {
 433                 tiq_list=q;
 434                 q->list_prev=q;
 435                 q->list_next=q;
 436         } else {
 437                 q->list_next=tiq_list;
 438                 q->list_prev=tiq_list->list_prev;
 439                 tiq_list->list_prev->list_next=q;
 440                 tiq_list->list_prev=q;
 441         }
 442         spin_unlock_irqrestore(&ttiq_list_lock,flags);
 443
 444         tiqdio_set_summary_bit((__u32*)q->dev_st_chg_ind);
 445         tiqdio_sched_tl();
 446         return;
 447 out_unlock:
 448         spin_unlock_irqrestore(&ttiq_list_lock,flags);
 449         return;
 450 }
 451
 452 static inline void
 453 qdio_mark_q(struct qdio_q *q)
 454 {
 455         QDIO_DBF_TEXT4(0,trace,"mark q");
 456         QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
 457
 458         if (unlikely(atomic_read(&q->is_in_shutdown)))
 459                 return;
 460
 461         tasklet_schedule(&q->tasklet);
 462 }
 463
 464 static inline int
 465 qdio_stop_polling(struct qdio_q *q)
 466 {
 467 #ifdef QDIO_USE_PROCESSING_STATE
 468        unsigned int tmp, gsf, count = 1;
 469        unsigned char state = 0;
 470        struct qdio_irq *irq = (struct qdio_irq *) q->irq_ptr;
 471
 472         if (!atomic_swap(&q->polling,0))
 473                 return 1;
 474
 475         QDIO_DBF_TEXT4(0,trace,"stoppoll");
 476         QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
 477
 478         /* show the card that we are not polling anymore */
 479         if (!q->is_input_q)
 480                 return 1;
 481
 482        tmp = gsf = GET_SAVED_FRONTIER(q);
 483        tmp = ((tmp + QDIO_MAX_BUFFERS_PER_Q-1) & (QDIO_MAX_BUFFERS_PER_Q-1) );
 484        set_slsb(q, &tmp, SLSB_P_INPUT_NOT_INIT, &count);
 485
 486         /*
 487          * we don't issue this SYNC_MEMORY, as we trust Rick T and
 488          * moreover will not use the PROCESSING state under VM, so
 489          * q->polling was 0 anyway
 490          */
 491         /*SYNC_MEMORY;*/
 492        if (irq->is_qebsm) {
 493                count = 1;
 494                qdio_do_eqbs(q, &state, &gsf, &count);
 495        } else
 496                state = q->slsb.acc.val[gsf];
 497        if (state != SLSB_P_INPUT_PRIMED)
 498                 return 1;
 499         /*
 500          * set our summary bit again, as otherwise there is a
 501          * small window we can miss between resetting it and
 502          * checking for PRIMED state
 503          */
 504         if (q->is_thinint_q)
 505                 tiqdio_set_summary_bit((__u32*)q->dev_st_chg_ind);
 506         return 0;
 507
 508 #else /* QDIO_USE_PROCESSING_STATE */
 509         return 1;
 510 #endif /* QDIO_USE_PROCESSING_STATE */
 511 }
 512
 513 /*
 514  * see the comment in do_QDIO and before qdio_reserve_q about the
 515  * sophisticated locking outside of unmark_q, so that we don't need to
 516  * disable the interrupts :-)
 517 */
 518 static inline void
 519 qdio_unmark_q(struct qdio_q *q)
 520 {
 521         unsigned long flags;
 522
 523         QDIO_DBF_TEXT4(0,trace,"unmark q");
 524         QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
 525
 526         if ((!q->list_prev)||(!q->list_next))
 527                 return;
 528
 529         if ((q->is_thinint_q)&&(q->is_input_q)) {
 530                 /* iQDIO */
 531                 spin_lock_irqsave(&ttiq_list_lock,flags);
 532                 /* in case cleanup has done this already and simultanously
 533                  * qdio_unmark_q is called from the interrupt handler, we've
 534                  * got to check this in this specific case again */
 535                 if ((!q->list_prev)||(!q->list_next))
 536                         goto out;
 537                 if (q->list_next==q) {
 538                         /* q was the only interesting q */
 539                         tiq_list=NULL;
 540                         q->list_next=NULL;
 541                         q->list_prev=NULL;
 542                 } else {
 543                         q->list_next->list_prev=q->list_prev;
 544                         q->list_prev->list_next=q->list_next;
 545                         tiq_list=q->list_next;
 546                         q->list_next=NULL;
 547                         q->list_prev=NULL;
 548                 }
 549 out:
 550                 spin_unlock_irqrestore(&ttiq_list_lock,flags);
 551         }
 552 }
 553
 554 static inline unsigned long
 555 tiqdio_clear_global_summary(void)
 556 {
 557         unsigned long time;
 558
 559         QDIO_DBF_TEXT5(0,trace,"clrglobl");
 560
 561         time = do_clear_global_summary();
 562
 563         QDIO_DBF_HEX5(0,trace,&time,sizeof(unsigned long));
 564
 565         return time;
 566 }
 567
 568
 569 /************************* OUTBOUND ROUTINES *******************************/
 570 static int
 571 qdio_qebsm_get_outbound_buffer_frontier(struct qdio_q *q)
 572 {
 573         struct qdio_irq *irq;
 574         unsigned char state;
 575         unsigned int cnt, count, ftc;
 576
 577         irq = (struct qdio_irq *) q->irq_ptr;
 578         if ((!q->is_iqdio_q) && (!q->hydra_gives_outbound_pcis))
 579                 SYNC_MEMORY;
 580
 581         ftc = q->first_to_check;
 582         count = qdio_min(atomic_read(&q->number_of_buffers_used),
 583                         (QDIO_MAX_BUFFERS_PER_Q-1));
 584         if (count == 0)
 585                 return q->first_to_check;
 586         cnt = qdio_do_eqbs(q, &state, &ftc, &count);
 587         if (cnt == 0)
 588                 return q->first_to_check;
 589         switch (state) {
 590         case SLSB_P_OUTPUT_ERROR:
 591                 QDIO_DBF_TEXT3(0,trace,"outperr");
 592                 atomic_sub(cnt , &q->number_of_buffers_used);
 593                 if (q->qdio_error)
 594                         q->error_status_flags |=
 595                                 QDIO_STATUS_MORE_THAN_ONE_QDIO_ERROR;
 596                 q->qdio_error = SLSB_P_OUTPUT_ERROR;
 597                 q->error_status_flags |= QDIO_STATUS_LOOK_FOR_ERROR;
 598                 q->first_to_check = ftc;
 599                 break;
 600         case SLSB_P_OUTPUT_EMPTY:
 601                 QDIO_DBF_TEXT5(0,trace,"outpempt");
 602                 atomic_sub(cnt, &q->number_of_buffers_used);
 603                 q->first_to_check = ftc;
 604                 break;
 605         case SLSB_CU_OUTPUT_PRIMED:
 606                 /* all buffers primed */
 607                 QDIO_DBF_TEXT5(0,trace,"outpprim");
 608                 break;
 609         default:
 610                 break;
 611         }
 612         QDIO_DBF_HEX4(0,trace,&q->first_to_check,sizeof(int));
 613         return q->first_to_check;
 614 }
 615
 616 static int
 617 qdio_qebsm_get_inbound_buffer_frontier(struct qdio_q *q)
 618 {
 619         struct qdio_irq *irq;
 620         unsigned char state;
 621         int tmp, ftc, count, cnt;
 622         char dbf_text[15];
 623
 624
 625         irq = (struct qdio_irq *) q->irq_ptr;
 626         ftc = q->first_to_check;
 627         count = qdio_min(atomic_read(&q->number_of_buffers_used),
 628                         (QDIO_MAX_BUFFERS_PER_Q-1));
 629         if (count == 0)
 630                  return q->first_to_check;
 631         cnt = qdio_do_eqbs(q, &state, &ftc, &count);
 632         if (cnt == 0)
 633                  return q->first_to_check;
 634         switch (state) {
 635         case SLSB_P_INPUT_ERROR :
 636 #ifdef CONFIG_QDIO_DEBUG
 637                 QDIO_DBF_TEXT3(1,trace,"inperr");
 638                 sprintf(dbf_text,"%2x,%2x",ftc,count);
 639                 QDIO_DBF_TEXT3(1,trace,dbf_text);
 640 #endif /* CONFIG_QDIO_DEBUG */
 641                 if (q->qdio_error)
 642                         q->error_status_flags |=
 643                                 QDIO_STATUS_MORE_THAN_ONE_QDIO_ERROR;
 644                 q->qdio_error = SLSB_P_INPUT_ERROR;
 645                 q->error_status_flags |= QDIO_STATUS_LOOK_FOR_ERROR;
 646                 atomic_sub(cnt, &q->number_of_buffers_used);
 647                 q->first_to_check = ftc;
 648                 break;
 649         case SLSB_P_INPUT_PRIMED :
 650                 QDIO_DBF_TEXT3(0,trace,"inptprim");
 651                 sprintf(dbf_text,"%2x,%2x",ftc,count);
 652                 QDIO_DBF_TEXT3(1,trace,dbf_text);
 653                 tmp = 0;
 654                 ftc = q->first_to_check;
 655 #ifdef QDIO_USE_PROCESSING_STATE
 656                 if (cnt > 1) {
 657                         cnt -= 1;
 658                         tmp = set_slsb(q, &ftc, SLSB_P_INPUT_NOT_INIT, &cnt);
 659                         if (!tmp)
 660                                 break;
 661                 }
 662                 cnt = 1;
 663                 tmp += set_slsb(q, &ftc,
 664                                SLSB_P_INPUT_PROCESSING, &cnt);
 665                 atomic_set(&q->polling, 1);
 666 #else
 667                 tmp = set_slsb(q, &ftc, SLSB_P_INPUT_NOT_INIT, &cnt);
 668 #endif
 669                 atomic_sub(tmp, &q->number_of_buffers_used);
 670                 q->first_to_check = ftc;
 671                 break;
 672         case SLSB_CU_INPUT_EMPTY:
 673         case SLSB_P_INPUT_NOT_INIT:
 674         case SLSB_P_INPUT_PROCESSING:
 675                 QDIO_DBF_TEXT5(0,trace,"inpnipro");
 676                 break;
 677         default:
 678                 break;
 679         }
 680         QDIO_DBF_HEX4(0,trace,&q->first_to_check,sizeof(int));
 681         return q->first_to_check;
 682 }
 683
 684 static inline int
 685 qdio_get_outbound_buffer_frontier(struct qdio_q *q)
 686 {
 687         struct qdio_irq *irq;
 688         volatile char *slsb;
 689         unsigned int count = 1;
 690         int first_not_to_check, f, f_mod_no;
 691         char dbf_text[15];
 692
 693         QDIO_DBF_TEXT4(0,trace,"getobfro");
 694         QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
 695
 696         irq = (struct qdio_irq *) q->irq_ptr;
 697         if (irq->is_qebsm)
 698                 return qdio_qebsm_get_outbound_buffer_frontier(q);
 699
 700         slsb=&q->slsb.acc.val[0];
 701         f_mod_no=f=q->first_to_check;
 702         /*
 703          * f points to already processed elements, so f+no_used is correct...
 704          * ... but: we don't check 128 buffers, as otherwise
 705          * qdio_has_outbound_q_moved would return 0
 706          */
 707         first_not_to_check=f+qdio_min(atomic_read(&q->number_of_buffers_used),
 708                                       (QDIO_MAX_BUFFERS_PER_Q-1));
 709
 710         if ((!q->is_iqdio_q)&&(!q->hydra_gives_outbound_pcis))
 711                 SYNC_MEMORY;
 712
 713 check_next:
 714         if (f==first_not_to_check)
 715                 goto out;
 716
 717         switch(slsb[f_mod_no]) {
 718
 719         /* the adapter has not fetched the output yet */
 720         case SLSB_CU_OUTPUT_PRIMED:
 721                 QDIO_DBF_TEXT5(0,trace,"outpprim");
 722                 break;
 723
 724         /* the adapter got it */
 725         case SLSB_P_OUTPUT_EMPTY:
 726                 atomic_dec(&q->number_of_buffers_used);
 727                 f++;
 728                 f_mod_no=f&(QDIO_MAX_BUFFERS_PER_Q-1);
 729                 QDIO_DBF_TEXT5(0,trace,"outpempt");
 730                 goto check_next;
 731
 732         case SLSB_P_OUTPUT_ERROR:
 733                 QDIO_DBF_TEXT3(0,trace,"outperr");
 734                 sprintf(dbf_text,"%x-%x-%x",f_mod_no,
 735                         q->sbal[f_mod_no]->element[14].sbalf.value,
 736                         q->sbal[f_mod_no]->element[15].sbalf.value);
 737                 QDIO_DBF_TEXT3(1,trace,dbf_text);
 738                 QDIO_DBF_HEX2(1,sbal,q->sbal[f_mod_no],256);
 739
 740                 /* kind of process the buffer */
 741                 set_slsb(q, &f_mod_no, SLSB_P_OUTPUT_NOT_INIT, &count);
 742
 743                 /*
 744                  * we increment the frontier, as this buffer
 745                  * was processed obviously
 746                  */
 747                 atomic_dec(&q->number_of_buffers_used);
 748                 f_mod_no=(f_mod_no+1)&(QDIO_MAX_BUFFERS_PER_Q-1);
 749
 750                 if (q->qdio_error)
 751                         q->error_status_flags|=
 752                                 QDIO_STATUS_MORE_THAN_ONE_QDIO_ERROR;
 753                 q->qdio_error=SLSB_P_OUTPUT_ERROR;
 754                 q->error_status_flags|=QDIO_STATUS_LOOK_FOR_ERROR;
 755
 756                 break;
 757
 758         /* no new buffers */
 759         default:
 760                 QDIO_DBF_TEXT5(0,trace,"outpni");
 761         }
 762 out:
 763         return (q->first_to_check=f_mod_no);
 764 }
 765
 766 /* all buffers are processed */
 767 static inline int
 768 qdio_is_outbound_q_done(struct qdio_q *q)
 769 {
 770         int no_used;
 771 #ifdef CONFIG_QDIO_DEBUG
 772         char dbf_text[15];
 773 #endif
 774
 775         no_used=atomic_read(&q->number_of_buffers_used);
 776
 777 #ifdef CONFIG_QDIO_DEBUG
 778         if (no_used) {
 779                 sprintf(dbf_text,"oqisnt%02x",no_used);
 780                 QDIO_DBF_TEXT4(0,trace,dbf_text);
 781         } else {
 782                 QDIO_DBF_TEXT4(0,trace,"oqisdone");
 783         }
 784         QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
 785 #endif /* CONFIG_QDIO_DEBUG */
 786         return (no_used==0);
 787 }
 788
 789 static inline int
 790 qdio_has_outbound_q_moved(struct qdio_q *q)
 791 {
 792         int i;
 793
 794         i=qdio_get_outbound_buffer_frontier(q);
 795
 796         if ( (i!=GET_SAVED_FRONTIER(q)) ||
 797              (q->error_status_flags&QDIO_STATUS_LOOK_FOR_ERROR) ) {
 798                 SAVE_FRONTIER(q,i);
 799                 QDIO_DBF_TEXT4(0,trace,"oqhasmvd");
 800                 QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
 801                 return 1;
 802         } else {
 803                 QDIO_DBF_TEXT4(0,trace,"oqhsntmv");
 804                 QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
 805                 return 0;
 806         }
 807 }
 808
 809 static inline void
 810 qdio_kick_outbound_q(struct qdio_q *q)
 811 {
 812         int result;
 813 #ifdef CONFIG_QDIO_DEBUG
 814         char dbf_text[15];
 815
 816         QDIO_DBF_TEXT4(0,trace,"kickoutq");
 817         QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
 818 #endif /* CONFIG_QDIO_DEBUG */
 819
 820         if (!q->siga_out)
 821                 return;
 822
 823         /* here's the story with cc=2 and busy bit set (thanks, Rick):
 824          * VM's CP could present us cc=2 and busy bit set on SIGA-write
 825          * during reconfiguration of their Guest LAN (only in HIPERS mode,
 826          * QDIO mode is asynchronous -- cc=2 and busy bit there will take
 827          * the queues down immediately; and not being under VM we have a
 828          * problem on cc=2 and busy bit set right away).
 829          *
 830          * Therefore qdio_siga_output will try for a short time constantly,
 831          * if such a condition occurs. If it doesn't change, it will
 832          * increase the busy_siga_counter and save the timestamp, and
 833          * schedule the queue for later processing (via mark_q, using the
 834          * queue tasklet). __qdio_outbound_processing will check out the
 835          * counter. If non-zero, it will call qdio_kick_outbound_q as often
 836          * as the value of the counter. This will attempt further SIGA
 837          * instructions. For each successful SIGA, the counter is
 838          * decreased, for failing SIGAs the counter remains the same, after
 839          * all.
 840          * After some time of no movement, qdio_kick_outbound_q will
 841          * finally fail and reflect corresponding error codes to call
 842          * the upper layer module and have it take the queues down.
 843          *
 844          * Note that this is a change from the original HiperSockets design
 845          * (saying cc=2 and busy bit means take the queues down), but in
 846          * these days Guest LAN didn't exist... excessive cc=2 with busy bit
 847          * conditions will still take the queues down, but the threshold is
 848          * higher due to the Guest LAN environment.
 849          */
 850
 851
 852         result=qdio_siga_output(q);
 853
 854         switch (result) {
 855         case 0:
 856                 /* went smooth this time, reset timestamp */
 857 #ifdef CONFIG_QDIO_DEBUG
 858                 QDIO_DBF_TEXT3(0,trace,"cc2reslv");
 859                 sprintf(dbf_text,"%4x%2x%2x",q->schid.sch_no,q->q_no,
 860                         atomic_read(&q->busy_siga_counter));
 861                 QDIO_DBF_TEXT3(0,trace,dbf_text);
 862 #endif /* CONFIG_QDIO_DEBUG */
 863                 q->timing.busy_start=0;
 864                 break;
 865         case (2|QDIO_SIGA_ERROR_B_BIT_SET):
 866                 /* cc=2 and busy bit: */
 867                 atomic_inc(&q->busy_siga_counter);
 868
 869                 /* if the last siga was successful, save
 870                  * timestamp here */
 871                 if (!q->timing.busy_start)
 872                         q->timing.busy_start=NOW;
 873
 874                 /* if we're in time, don't touch error_status_flags
 875                  * and siga_error */
 876                 if (NOW-q->timing.busy_start<QDIO_BUSY_BIT_GIVE_UP) {
 877                         qdio_mark_q(q);
 878                         break;
 879                 }
 880                 QDIO_DBF_TEXT2(0,trace,"cc2REPRT");
 881 #ifdef CONFIG_QDIO_DEBUG
 882                 sprintf(dbf_text,"%4x%2x%2x",q->schid.sch_no,q->q_no,
 883                         atomic_read(&q->busy_siga_counter));
 884                 QDIO_DBF_TEXT3(0,trace,dbf_text);
 885 #endif /* CONFIG_QDIO_DEBUG */
 886                 /* else fallthrough and report error */
 887         default:
 888                 /* for plain cc=1, 2 or 3: */
 889                 if (q->siga_error)
 890                         q->error_status_flags|=
 891                                 QDIO_STATUS_MORE_THAN_ONE_SIGA_ERROR;
 892                 q->error_status_flags|=
 893                         QDIO_STATUS_LOOK_FOR_ERROR;
 894                 q->siga_error=result;
 895         }
 896 }
 897
 898 static inline void
 899 qdio_kick_outbound_handler(struct qdio_q *q)
 900 {
 901         int start, end, real_end, count;
 902 #ifdef CONFIG_QDIO_DEBUG
 903         char dbf_text[15];
 904 #endif
 905
 906         start = q->first_element_to_kick;
 907         /* last_move_ftc was just updated */
 908         real_end = GET_SAVED_FRONTIER(q);
 909         end = (real_end+QDIO_MAX_BUFFERS_PER_Q-1)&
 910                 (QDIO_MAX_BUFFERS_PER_Q-1);
 911         count = (end+QDIO_MAX_BUFFERS_PER_Q+1-start)&
 912                 (QDIO_MAX_BUFFERS_PER_Q-1);
 913
 914 #ifdef CONFIG_QDIO_DEBUG
 915         QDIO_DBF_TEXT4(0,trace,"kickouth");
 916         QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
 917
 918         sprintf(dbf_text,"s=%2xc=%2x",start,count);
 919         QDIO_DBF_TEXT4(0,trace,dbf_text);
 920 #endif /* CONFIG_QDIO_DEBUG */
 921
 922         if (q->state==QDIO_IRQ_STATE_ACTIVE)
 923                 q->handler(q->cdev,QDIO_STATUS_OUTBOUND_INT|
 924                            q->error_status_flags,
 925                            q->qdio_error,q->siga_error,q->q_no,start,count,
 926                            q->int_parm);
 927
 928         /* for the next time: */
 929         q->first_element_to_kick=real_end;
 930         q->qdio_error=0;
 931         q->siga_error=0;
 932         q->error_status_flags=0;
 933 }
 934
 935 static inline void
 936 __qdio_outbound_processing(struct qdio_q *q)
 937 {
 938         int siga_attempts;
 939
 940         QDIO_DBF_TEXT4(0,trace,"qoutproc");
 941         QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
 942
 943         if (unlikely(qdio_reserve_q(q))) {
 944                 qdio_release_q(q);
 945 #ifdef QDIO_PERFORMANCE_STATS
 946                 o_p_c++;
 947 #endif /* QDIO_PERFORMANCE_STATS */
 948                 /* as we're sissies, we'll check next time */
 949                 if (likely(!atomic_read(&q->is_in_shutdown))) {
 950                         qdio_mark_q(q);
 951                         QDIO_DBF_TEXT4(0,trace,"busy,agn");
 952                 }
 953                 return;
 954         }
 955 #ifdef QDIO_PERFORMANCE_STATS
 956         o_p_nc++;
 957         perf_stats.tl_runs++;
 958 #endif /* QDIO_PERFORMANCE_STATS */
 959
 960         /* see comment in qdio_kick_outbound_q */
 961         siga_attempts=atomic_read(&q->busy_siga_counter);
 962         while (siga_attempts) {
 963                 atomic_dec(&q->busy_siga_counter);
 964                 qdio_kick_outbound_q(q);
 965                 siga_attempts--;
 966         }
 967
 968         if (qdio_has_outbound_q_moved(q))
 969                 qdio_kick_outbound_handler(q);
 970
 971         if (q->is_iqdio_q) {
 972                 /*
 973                  * for asynchronous queues, we better check, if the fill
 974                  * level is too high. for synchronous queues, the fill
 975                  * level will never be that high.
 976                  */
 977                 if (atomic_read(&q->number_of_buffers_used)>
 978                     IQDIO_FILL_LEVEL_TO_POLL)
 979                         qdio_mark_q(q);
 980
 981         } else if (!q->hydra_gives_outbound_pcis)
 982                 if (!qdio_is_outbound_q_done(q))
 983                         qdio_mark_q(q);
 984
 985         qdio_release_q(q);
 986 }
 987
 988 static void
 989 qdio_outbound_processing(struct qdio_q *q)
 990 {
 991         __qdio_outbound_processing(q);
 992 }
 993
 994 /************************* INBOUND ROUTINES *******************************/
 995
 996
 997 static inline int
 998 qdio_get_inbound_buffer_frontier(struct qdio_q *q)
 999 {
1000         struct qdio_irq *irq;
1001         int f,f_mod_no;
1002         volatile char *slsb;
1003         unsigned int count = 1;
1004         int first_not_to_check;
1005 #ifdef CONFIG_QDIO_DEBUG
1006         char dbf_text[15];
1007 #endif /* CONFIG_QDIO_DEBUG */
1008 #ifdef QDIO_USE_PROCESSING_STATE
1009         int last_position=-1;
1010 #endif /* QDIO_USE_PROCESSING_STATE */
1011
1012         QDIO_DBF_TEXT4(0,trace,"getibfro");
1013         QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
1014
1015         irq = (struct qdio_irq *) q->irq_ptr;
1016         if (irq->is_qebsm)
1017                 return qdio_qebsm_get_inbound_buffer_frontier(q);
1018
1019         slsb=&q->slsb.acc.val[0];
1020         f_mod_no=f=q->first_to_check;
1021         /*
1022          * we don't check 128 buffers, as otherwise qdio_has_inbound_q_moved
1023          * would return 0
1024          */
1025         first_not_to_check=f+qdio_min(atomic_read(&q->number_of_buffers_used),
1026                                       (QDIO_MAX_BUFFERS_PER_Q-1));
1027
1028         /*
1029          * we don't use this one, as a PCI or we after a thin interrupt
1030          * will sync the queues
1031          */
1032         /* SYNC_MEMORY;*/
1033
1034 check_next:
1035         f_mod_no=f&(QDIO_MAX_BUFFERS_PER_Q-1);
1036         if (f==first_not_to_check)
1037                 goto out;
1038         switch (slsb[f_mod_no]) {
1039
1040         /* CU_EMPTY means frontier is reached */
1041         case SLSB_CU_INPUT_EMPTY:
1042                 QDIO_DBF_TEXT5(0,trace,"inptempt");
1043                 break;
1044
1045         /* P_PRIMED means set slsb to P_PROCESSING and move on */
1046         case SLSB_P_INPUT_PRIMED:
1047                 QDIO_DBF_TEXT5(0,trace,"inptprim");
1048
1049 #ifdef QDIO_USE_PROCESSING_STATE
1050                 /*
1051                  * as soon as running under VM, polling the input queues will
1052                  * kill VM in terms of CP overhead
1053                  */
1054                 if (q->siga_sync) {
1055                         set_slsb(q, &f_mod_no, SLSB_P_INPUT_NOT_INIT, &count);
1056                 } else {
1057                         /* set the previous buffer to NOT_INIT. The current
1058                          * buffer will be set to PROCESSING at the end of
1059                          * this function to avoid further interrupts. */
1060                         if (last_position>=0)
1061                                 set_slsb(q, &last_position,
1062                                          SLSB_P_INPUT_NOT_INIT, &count);
1063                         atomic_set(&q->polling,1);
1064                         last_position=f_mod_no;
1065                 }
1066 #else /* QDIO_USE_PROCESSING_STATE */
1067                 set_slsb(q, &f_mod_no, SLSB_P_INPUT_NOT_INIT, &count);
1068 #endif /* QDIO_USE_PROCESSING_STATE */
1069                 /*
1070                  * not needed, as the inbound queue will be synced on the next
1071                  * siga-r, resp. tiqdio_is_inbound_q_done will do the siga-s
1072                  */
1073                 /*SYNC_MEMORY;*/
1074                 f++;
1075                 atomic_dec(&q->number_of_buffers_used);
1076                 goto check_next;
1077
1078         case SLSB_P_INPUT_NOT_INIT:
1079         case SLSB_P_INPUT_PROCESSING:
1080                 QDIO_DBF_TEXT5(0,trace,"inpnipro");
1081                 break;
1082
1083         /* P_ERROR means frontier is reached, break and report error */
1084         case SLSB_P_INPUT_ERROR:
1085 #ifdef CONFIG_QDIO_DEBUG
1086                 sprintf(dbf_text,"inperr%2x",f_mod_no);
1087                 QDIO_DBF_TEXT3(1,trace,dbf_text);
1088 #endif /* CONFIG_QDIO_DEBUG */
1089                 QDIO_DBF_HEX2(1,sbal,q->sbal[f_mod_no],256);
1090
1091                 /* kind of process the buffer */
1092                 set_slsb(q, &f_mod_no, SLSB_P_INPUT_NOT_INIT, &count);
1093
1094                 if (q->qdio_error)
1095                         q->error_status_flags|=
1096                                 QDIO_STATUS_MORE_THAN_ONE_QDIO_ERROR;
1097                 q->qdio_error=SLSB_P_INPUT_ERROR;
1098                 q->error_status_flags|=QDIO_STATUS_LOOK_FOR_ERROR;
1099
1100                 /* we increment the frontier, as this buffer
1101                  * was processed obviously */
1102                 f_mod_no=(f_mod_no+1)&(QDIO_MAX_BUFFERS_PER_Q-1);
1103                 atomic_dec(&q->number_of_buffers_used);
1104
1105 #ifdef QDIO_USE_PROCESSING_STATE
1106                 last_position=-1;
1107 #endif /* QDIO_USE_PROCESSING_STATE */
1108
1109                 break;
1110
1111         /* everything else means frontier not changed (HALTED or so) */
1112         default:
1113                 break;
1114         }
1115 out:
1116         q->first_to_check=f_mod_no;
1117
1118 #ifdef QDIO_USE_PROCESSING_STATE
1119         if (last_position>=0)
1120                 set_slsb(q, &last_position, SLSB_P_INPUT_NOT_INIT, &count);
1121 #endif /* QDIO_USE_PROCESSING_STATE */
1122
1123         QDIO_DBF_HEX4(0,trace,&q->first_to_check,sizeof(int));
1124
1125         return q->first_to_check;
1126 }
1127
1128 static inline int
1129 qdio_has_inbound_q_moved(struct qdio_q *q)
1130 {
1131         int i;
1132
1133 #ifdef QDIO_PERFORMANCE_STATS
1134         static int old_pcis=0;
1135         static int old_thinints=0;
1136
1137         if ((old_pcis==perf_stats.pcis)&&(old_thinints==perf_stats.thinints))
1138                 perf_stats.start_time_inbound=NOW;
1139         else
1140                 old_pcis=perf_stats.pcis;
1141 #endif /* QDIO_PERFORMANCE_STATS */
1142
1143         i=qdio_get_inbound_buffer_frontier(q);
1144         if ( (i!=GET_SAVED_FRONTIER(q)) ||
1145              (q->error_status_flags&QDIO_STATUS_LOOK_FOR_ERROR) ) {
1146                 SAVE_FRONTIER(q,i);
1147                 if ((!q->siga_sync)&&(!q->hydra_gives_outbound_pcis))
1148                         SAVE_TIMESTAMP(q);
1149
1150                 QDIO_DBF_TEXT4(0,trace,"inhasmvd");
1151                 QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
1152                 return 1;
1153         } else {
1154                 QDIO_DBF_TEXT4(0,trace,"inhsntmv");
1155                 QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
1156                 return 0;
1157         }
1158 }
1159
1160 /* means, no more buffers to be filled */
1161 static inline int
1162 tiqdio_is_inbound_q_done(struct qdio_q *q)
1163 {
1164         int no_used;
1165         unsigned int start_buf, count;
1166         unsigned char state = 0;
1167         struct qdio_irq *irq = (struct qdio_irq *) q->irq_ptr;
1168
1169 #ifdef CONFIG_QDIO_DEBUG
1170         char dbf_text[15];
1171 #endif
1172
1173         no_used=atomic_read(&q->number_of_buffers_used);
1174
1175         /* propagate the change from 82 to 80 through VM */
1176         SYNC_MEMORY;
1177
1178 #ifdef CONFIG_QDIO_DEBUG
1179         if (no_used) {
1180                 sprintf(dbf_text,"iqisnt%02x",no_used);
1181                 QDIO_DBF_TEXT4(0,trace,dbf_text);
1182         } else {
1183                 QDIO_DBF_TEXT4(0,trace,"iniqisdo");
1184         }
1185         QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
1186 #endif /* CONFIG_QDIO_DEBUG */
1187
1188         if (!no_used)
1189                 return 1;
1190
1191         if (!q->siga_sync)
1192                 /* we'll check for more primed buffers in qeth_stop_polling */
1193                 return 0;
1194         if (irq->is_qebsm) {
1195                 count = 1;
1196                 start_buf = q->first_to_check;
1197                 qdio_do_eqbs(q, &state, &start_buf, &count);
1198         } else
1199                 state = q->slsb.acc.val[q->first_to_check];
1200         if (state != SLSB_P_INPUT_PRIMED)
1201                 /*
1202                  * nothing more to do, if next buffer is not PRIMED.
1203                  * note that we did a SYNC_MEMORY before, that there
1204                  * has been a sychnronization.
1205                  * we will return 0 below, as there is nothing to do
1206                  * (stop_polling not necessary, as we have not been
1207                  * using the PROCESSING state
1208                  */
1209                 return 0;
1210
1211         /*
1212          * ok, the next input buffer is primed. that means, that device state
1213          * change indicator and adapter local summary are set, so we will find
1214          * it next time.
1215          * we will return 0 below, as there is nothing to do, except scheduling
1216          * ourselves for the next time.
1217          */
1218         tiqdio_set_summary_bit((__u32*)q->dev_st_chg_ind);
1219         tiqdio_sched_tl();
1220         return 0;
1221 }
1222
1223 static inline int
1224 qdio_is_inbound_q_done(struct qdio_q *q)
1225 {
1226         int no_used;
1227         unsigned int start_buf, count;
1228         unsigned char state = 0;
1229         struct qdio_irq *irq = (struct qdio_irq *) q->irq_ptr;
1230
1231 #ifdef CONFIG_QDIO_DEBUG
1232         char dbf_text[15];
1233 #endif
1234
1235         no_used=atomic_read(&q->number_of_buffers_used);
1236
1237         /*
1238          * we need that one for synchronization with the adapter, as it
1239          * does a kind of PCI avoidance
1240          */
1241         SYNC_MEMORY;
1242
1243         if (!no_used) {
1244                 QDIO_DBF_TEXT4(0,trace,"inqisdnA");
1245                 QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
1246                 QDIO_DBF_TEXT4(0,trace,dbf_text);
1247                 return 1;
1248         }
1249         if (irq->is_qebsm) {
1250                 count = 1;
1251                 start_buf = q->first_to_check;
1252                 qdio_do_eqbs(q, &state, &start_buf, &count);
1253         } else
1254                 state = q->slsb.acc.val[q->first_to_check];
1255         if (state == SLSB_P_INPUT_PRIMED) {
1256                 /* we got something to do */
1257                 QDIO_DBF_TEXT4(0,trace,"inqisntA");
1258                 QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
1259                 return 0;
1260         }
1261
1262         /* on VM, we don't poll, so the q is always done here */
1263         if (q->siga_sync)
1264                 return 1;
1265         if (q->hydra_gives_outbound_pcis)
1266                 return 1;
1267
1268         /*
1269          * at this point we know, that inbound first_to_check
1270          * has (probably) not moved (see qdio_inbound_processing)
1271          */
1272         if (NOW>GET_SAVED_TIMESTAMP(q)+q->timing.threshold) {
1273 #ifdef CONFIG_QDIO_DEBUG
1274                 QDIO_DBF_TEXT4(0,trace,"inqisdon");
1275                 QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
1276                 sprintf(dbf_text,"pf%02xcn%02x",q->first_to_check,no_used);
1277                 QDIO_DBF_TEXT4(0,trace,dbf_text);
1278 #endif /* CONFIG_QDIO_DEBUG */
1279                 return 1;
1280         } else {
1281 #ifdef CONFIG_QDIO_DEBUG
1282                 QDIO_DBF_TEXT4(0,trace,"inqisntd");
1283                 QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
1284                 sprintf(dbf_text,"pf%02xcn%02x",q->first_to_check,no_used);
1285                 QDIO_DBF_TEXT4(0,trace,dbf_text);
1286 #endif /* CONFIG_QDIO_DEBUG */
1287                 return 0;
1288         }
1289 }
1290
1291 static inline void
1292 qdio_kick_inbound_handler(struct qdio_q *q)
1293 {
1294         int count, start, end, real_end, i;
1295 #ifdef CONFIG_QDIO_DEBUG
1296         char dbf_text[15];
1297 #endif
1298
1299         QDIO_DBF_TEXT4(0,trace,"kickinh");
1300         QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
1301
1302         start=q->first_element_to_kick;
1303         real_end=q->first_to_check;
1304         end=(real_end+QDIO_MAX_BUFFERS_PER_Q-1)&(QDIO_MAX_BUFFERS_PER_Q-1);
1305
1306         i=start;
1307         count=0;
1308         while (1) {
1309                 count++;
1310                 if (i==end)
1311                         break;
1312                 i=(i+1)&(QDIO_MAX_BUFFERS_PER_Q-1);
1313         }
1314
1315 #ifdef CONFIG_QDIO_DEBUG
1316         sprintf(dbf_text,"s=%2xc=%2x",start,count);
1317         QDIO_DBF_TEXT4(0,trace,dbf_text);
1318 #endif /* CONFIG_QDIO_DEBUG */
1319
1320         if (likely(q->state==QDIO_IRQ_STATE_ACTIVE))
1321                 q->handler(q->cdev,
1322                            QDIO_STATUS_INBOUND_INT|q->error_status_flags,
1323                            q->qdio_error,q->siga_error,q->q_no,start,count,
1324                            q->int_parm);
1325
1326         /* for the next time: */
1327         q->first_element_to_kick=real_end;
1328         q->qdio_error=0;
1329         q->siga_error=0;
1330         q->error_status_flags=0;
1331
1332 #ifdef QDIO_PERFORMANCE_STATS
1333         perf_stats.inbound_time+=NOW-perf_stats.start_time_inbound;
1334         perf_stats.inbound_cnt++;
1335 #endif /* QDIO_PERFORMANCE_STATS */
1336 }
1337
1338 static inline void
1339 __tiqdio_inbound_processing(struct qdio_q *q, int spare_ind_was_set)
1340 {
1341         struct qdio_irq *irq_ptr;
1342         struct qdio_q *oq;
1343         int i;
1344
1345         QDIO_DBF_TEXT4(0,trace,"iqinproc");
1346         QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
1347
1348         /*
1349          * we first want to reserve the q, so that we know, that we don't
1350          * interrupt ourselves and call qdio_unmark_q, as is_in_shutdown might
1351          * be set
1352          */
1353         if (unlikely(qdio_reserve_q(q))) {
1354                 qdio_release_q(q);
1355 #ifdef QDIO_PERFORMANCE_STATS
1356                 ii_p_c++;
1357 #endif /* QDIO_PERFORMANCE_STATS */
1358                 /*
1359                  * as we might just be about to stop polling, we make
1360                  * sure that we check again at least once more
1361                  */
1362                 tiqdio_sched_tl();
1363                 return;
1364         }
1365 #ifdef QDIO_PERFORMANCE_STATS
1366         ii_p_nc++;
1367 #endif /* QDIO_PERFORMANCE_STATS */
1368         if (unlikely(atomic_read(&q->is_in_shutdown))) {
1369                 qdio_unmark_q(q);
1370                 goto out;
1371         }
1372
1373         /*
1374          * we reset spare_ind_was_set, when the queue does not use the
1375          * spare indicator
1376          */
1377         if (spare_ind_was_set)
1378                 spare_ind_was_set = (q->dev_st_chg_ind == &spare_indicator);
1379
1380         if (!(*(q->dev_st_chg_ind)) && !spare_ind_was_set)
1381                 goto out;
1382         /*
1383          * q->dev_st_chg_ind is the indicator, be it shared or not.
1384          * only clear it, if indicator is non-shared
1385          */
1386         if (!spare_ind_was_set)
1387                 tiqdio_clear_summary_bit((__u32*)q->dev_st_chg_ind);
1388
1389         if (q->hydra_gives_outbound_pcis) {
1390                 if (!q->siga_sync_done_on_thinints) {
1391                         SYNC_MEMORY_ALL;
1392                 } else if ((!q->siga_sync_done_on_outb_tis)&&
1393                          (q->hydra_gives_outbound_pcis)) {
1394                         SYNC_MEMORY_ALL_OUTB;
1395                 }
1396         } else {
1397                 SYNC_MEMORY;
1398         }
1399         /*
1400          * maybe we have to do work on our outbound queues... at least
1401          * we have to check the outbound-int-capable thinint-capable
1402          * queues
1403          */
1404         if (q->hydra_gives_outbound_pcis) {
1405                 irq_ptr = (struct qdio_irq*)q->irq_ptr;
1406                 for (i=0;i<irq_ptr->no_output_qs;i++) {
1407                         oq = irq_ptr->output_qs[i];
1408 #ifdef QDIO_PERFORMANCE_STATS
1409                         perf_stats.tl_runs--;
1410 #endif /* QDIO_PERFORMANCE_STATS */
1411                         if (!qdio_is_outbound_q_done(oq))
1412                                 __qdio_outbound_processing(oq);
1413                 }
1414         }
1415
1416         if (!qdio_has_inbound_q_moved(q))
1417                 goto out;
1418
1419         qdio_kick_inbound_handler(q);
1420         if (tiqdio_is_inbound_q_done(q))
1421                 if (!qdio_stop_polling(q)) {
1422                         /*
1423                          * we set the flags to get into the stuff next time,
1424                          * see also comment in qdio_stop_polling
1425                          */
1426                         tiqdio_set_summary_bit((__u32*)q->dev_st_chg_ind);
1427                         tiqdio_sched_tl();
1428                 }
1429 out:
1430         qdio_release_q(q);
1431 }
1432
1433 static void
1434 tiqdio_inbound_processing(struct qdio_q *q)
1435 {
1436         __tiqdio_inbound_processing(q, atomic_read(&spare_indicator_usecount));
1437 }
1438
1439 static inline void
1440 __qdio_inbound_processing(struct qdio_q *q)
1441 {
1442         int q_laps=0;
1443
1444         QDIO_DBF_TEXT4(0,trace,"qinproc");
1445         QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
1446
1447         if (unlikely(qdio_reserve_q(q))) {
1448                 qdio_release_q(q);
1449 #ifdef QDIO_PERFORMANCE_STATS
1450                 i_p_c++;
1451 #endif /* QDIO_PERFORMANCE_STATS */
1452                 /* as we're sissies, we'll check next time */
1453                 if (likely(!atomic_read(&q->is_in_shutdown))) {
1454                         qdio_mark_q(q);
1455                         QDIO_DBF_TEXT4(0,trace,"busy,agn");
1456                 }
1457                 return;
1458         }
1459 #ifdef QDIO_PERFORMANCE_STATS
1460         i_p_nc++;
1461         perf_stats.tl_runs++;
1462 #endif /* QDIO_PERFORMANCE_STATS */
1463
1464 again:
1465         if (qdio_has_inbound_q_moved(q)) {
1466                 qdio_kick_inbound_handler(q);
1467                 if (!qdio_stop_polling(q)) {
1468                         q_laps++;
1469                         if (q_laps<QDIO_Q_LAPS)
1470                                 goto again;
1471                 }
1472                 qdio_mark_q(q);
1473         } else {
1474                 if (!qdio_is_inbound_q_done(q))
1475                         /* means poll time is not yet over */
1476                         qdio_mark_q(q);
1477         }
1478
1479         qdio_release_q(q);
1480 }
1481
1482 static void
1483 qdio_inbound_processing(struct qdio_q *q)
1484 {
1485         __qdio_inbound_processing(q);
1486 }
1487
1488 /************************* MAIN ROUTINES *******************************/
1489
1490 #ifdef QDIO_USE_PROCESSING_STATE
1491 static inline int
1492 tiqdio_reset_processing_state(struct qdio_q *q, int q_laps)
1493 {
1494         if (!q) {
1495                 tiqdio_sched_tl();
1496                 return 0;
1497         }
1498
1499         /*
1500          * under VM, we have not used the PROCESSING state, so no
1501          * need to stop polling
1502          */
1503         if (q->siga_sync)
1504                 return 2;
1505
1506         if (unlikely(qdio_reserve_q(q))) {
1507                 qdio_release_q(q);
1508 #ifdef QDIO_PERFORMANCE_STATS
1509                 ii_p_c++;
1510 #endif /* QDIO_PERFORMANCE_STATS */
1511                 /*
1512                  * as we might just be about to stop polling, we make
1513                  * sure that we check again at least once more
1514                  */
1515
1516                 /*
1517                  * sanity -- we'd get here without setting the
1518                  * dev st chg ind
1519                  */
1520                 tiqdio_set_summary_bit((__u32*)q->dev_st_chg_ind);
1521                 tiqdio_sched_tl();
1522                 return 0;
1523         }
1524         if (qdio_stop_polling(q)) {
1525                 qdio_release_q(q);
1526                 return 2;
1527         }
1528         if (q_laps<QDIO_Q_LAPS-1) {
1529                 qdio_release_q(q);
1530                 return 3;
1531         }
1532         /*
1533          * we set the flags to get into the stuff
1534          * next time, see also comment in qdio_stop_polling
1535          */
1536         tiqdio_set_summary_bit((__u32*)q->dev_st_chg_ind);
1537         tiqdio_sched_tl();
1538         qdio_release_q(q);
1539         return 1;
1540
1541 }
1542 #endif /* QDIO_USE_PROCESSING_STATE */
1543
1544 static inline void
1545 tiqdio_inbound_checks(void)
1546 {
1547         struct qdio_q *q;
1548         int spare_ind_was_set=0;
1549 #ifdef QDIO_USE_PROCESSING_STATE
1550         int q_laps=0;
1551 #endif /* QDIO_USE_PROCESSING_STATE */
1552
1553         QDIO_DBF_TEXT4(0,trace,"iqdinbck");
1554         QDIO_DBF_TEXT5(0,trace,"iqlocsum");
1555
1556 #ifdef QDIO_USE_PROCESSING_STATE
1557 again:
1558 #endif /* QDIO_USE_PROCESSING_STATE */
1559
1560         /* when the spare indicator is used and set, save that and clear it */
1561         if ((atomic_read(&spare_indicator_usecount)) && spare_indicator) {
1562                 spare_ind_was_set = 1;
1563                 tiqdio_clear_summary_bit((__u32*)&spare_indicator);
1564         }
1565
1566         q=(struct qdio_q*)tiq_list;
1567         do {
1568                 if (!q)
1569                         break;
1570                 __tiqdio_inbound_processing(q, spare_ind_was_set);
1571                 q=(struct qdio_q*)q->list_next;
1572         } while (q!=(struct qdio_q*)tiq_list);
1573
1574 #ifdef QDIO_USE_PROCESSING_STATE
1575         q=(struct qdio_q*)tiq_list;
1576         do {
1577                 int ret;
1578
1579                 ret = tiqdio_reset_processing_state(q, q_laps);
1580                 switch (ret) {
1581                 case 0:
1582                         return;
1583                 case 1:
1584                         q_laps++;
1585                 case 2:
1586                         q = (struct qdio_q*)q->list_next;
1587                         break;
1588                 default:
1589                         q_laps++;
1590                         goto again;
1591                 }
1592         } while (q!=(struct qdio_q*)tiq_list);
1593 #endif /* QDIO_USE_PROCESSING_STATE */
1594 }
1595
1596 static void
1597 tiqdio_tl(unsigned long data)
1598 {
1599         QDIO_DBF_TEXT4(0,trace,"iqdio_tl");
1600
1601 #ifdef QDIO_PERFORMANCE_STATS
1602         perf_stats.tl_runs++;
1603 #endif /* QDIO_PERFORMANCE_STATS */
1604
1605         tiqdio_inbound_checks();
1606 }
1607
1608 /********************* GENERAL HELPER_ROUTINES ***********************/
1609
1610 static void
1611 qdio_release_irq_memory(struct qdio_irq *irq_ptr)
1612 {
1613         int i;
1614
1615         for (i=0;i<QDIO_MAX_QUEUES_PER_IRQ;i++) {
1616                 if (!irq_ptr->input_qs[i])
1617                         goto next;
1618
1619                 kfree(irq_ptr->input_qs[i]->slib);
1620                 kfree(irq_ptr->input_qs[i]);
1621
1622 next:
1623                 if (!irq_ptr->output_qs[i])
1624                         continue;
1625
1626                 kfree(irq_ptr->output_qs[i]->slib);
1627                 kfree(irq_ptr->output_qs[i]);
1628
1629         }
1630         kfree(irq_ptr->qdr);
1631         kfree(irq_ptr);
1632 }
1633
1634 static void
1635 qdio_set_impl_params(struct qdio_irq *irq_ptr,
1636                      unsigned int qib_param_field_format,
1637                      /* pointer to 128 bytes or NULL, if no param field */
1638                      unsigned char *qib_param_field,
1639                      /* pointer to no_queues*128 words of data or NULL */
1640                      unsigned int no_input_qs,
1641                      unsigned int no_output_qs,
1642                      unsigned long *input_slib_elements,
1643                      unsigned long *output_slib_elements)
1644 {
1645         int i,j;
1646
1647         if (!irq_ptr)
1648                 return;
1649
1650         irq_ptr->qib.pfmt=qib_param_field_format;
1651         if (qib_param_field)
1652                 memcpy(irq_ptr->qib.parm,qib_param_field,
1653                        QDIO_MAX_BUFFERS_PER_Q);
1654
1655         if (input_slib_elements)
1656                 for (i=0;i<no_input_qs;i++) {
1657                         for (j=0;j<QDIO_MAX_BUFFERS_PER_Q;j++)
1658                                 irq_ptr->input_qs[i]->slib->slibe[j].parms=
1659                                         input_slib_elements[
1660                                                 i*QDIO_MAX_BUFFERS_PER_Q+j];
1661                 }
1662         if (output_slib_elements)
1663                 for (i=0;i<no_output_qs;i++) {
1664                         for (j=0;j<QDIO_MAX_BUFFERS_PER_Q;j++)
1665                                 irq_ptr->output_qs[i]->slib->slibe[j].parms=
1666                                         output_slib_elements[
1667                                                 i*QDIO_MAX_BUFFERS_PER_Q+j];
1668                 }
1669 }
1670
1671 static int
1672 qdio_alloc_qs(struct qdio_irq *irq_ptr,
1673               int no_input_qs, int no_output_qs)
1674 {
1675         int i;
1676         struct qdio_q *q;
1677         int result=-ENOMEM;
1678
1679         for (i=0;i<no_input_qs;i++) {
1680                 q=kmalloc(sizeof(struct qdio_q),GFP_KERNEL);
1681
1682                 if (!q) {
1683                         QDIO_PRINT_ERR("kmalloc of q failed!\n");
1684                         goto out;
1685                 }
1686
1687                 memset(q,0,sizeof(struct qdio_q));
1688
1689                 q->slib=kmalloc(PAGE_SIZE,GFP_KERNEL);
1690                 if (!q->slib) {
1691                         QDIO_PRINT_ERR("kmalloc of slib failed!\n");
1692                         goto out;
1693                 }
1694
1695                 irq_ptr->input_qs[i]=q;
1696         }
1697
1698         for (i=0;i<no_output_qs;i++) {
1699                 q=kmalloc(sizeof(struct qdio_q),GFP_KERNEL);
1700
1701                 if (!q) {
1702                         goto out;
1703                 }
1704
1705                 memset(q,0,sizeof(struct qdio_q));
1706
1707                 q->slib=kmalloc(PAGE_SIZE,GFP_KERNEL);
1708                 if (!q->slib) {
1709                         QDIO_PRINT_ERR("kmalloc of slib failed!\n");
1710                         goto out;
1711                 }
1712
1713                 irq_ptr->output_qs[i]=q;
1714         }
1715
1716         result=0;
1717 out:
1718         return result;
1719 }
1720
1721 static void
1722 qdio_fill_qs(struct qdio_irq *irq_ptr, struct ccw_device *cdev,
1723              int no_input_qs, int no_output_qs,
1724              qdio_handler_t *input_handler,
1725              qdio_handler_t *output_handler,
1726              unsigned long int_parm,int q_format,
1727              unsigned long flags,
1728              void **inbound_sbals_array,
1729              void **outbound_sbals_array)
1730 {
1731         struct qdio_q *q;
1732         int i,j;
1733         char dbf_text[20]; /* see qdio_initialize */
1734         void *ptr;
1735         int available;
1736
1737         sprintf(dbf_text,"qfqs%4x",cdev->private->sch_no);
1738         QDIO_DBF_TEXT0(0,setup,dbf_text);
1739         for (i=0;i<no_input_qs;i++) {
1740                 q=irq_ptr->input_qs[i];
1741
1742                 memset(q,0,((char*)&q->slib)-((char*)q));
1743                 sprintf(dbf_text,"in-q%4x",i);
1744                 QDIO_DBF_TEXT0(0,setup,dbf_text);
1745                 QDIO_DBF_HEX0(0,setup,&q,sizeof(void*));
1746
1747                 memset(q->slib,0,PAGE_SIZE);
1748                 q->sl=(struct sl*)(((char*)q->slib)+PAGE_SIZE/2);
1749
1750                 available=0;
1751
1752                 for (j=0;j<QDIO_MAX_BUFFERS_PER_Q;j++)
1753                         q->sbal[j]=*(inbound_sbals_array++);
1754
1755                 q->queue_type=q_format;
1756                 q->int_parm=int_parm;
1757                 q->schid = irq_ptr->schid;
1758                 q->irq_ptr = irq_ptr;
1759                 q->cdev = cdev;
1760                 q->mask=1<<(31-i);
1761                 q->q_no=i;
1762                 q->is_input_q=1;
1763                 q->first_to_check=0;
1764                 q->last_move_ftc=0;
1765                 q->handler=input_handler;
1766                 q->dev_st_chg_ind=irq_ptr->dev_st_chg_ind;
1767
1768                 q->tasklet.data=(unsigned long)q;
1769                 /* q->is_thinint_q isn't valid at this time, but
1770                  * irq_ptr->is_thinint_irq is */
1771                 q->tasklet.func=(void(*)(unsigned long))
1772                         ((irq_ptr->is_thinint_irq)?&tiqdio_inbound_processing:
1773                          &qdio_inbound_processing);
1774
1775                 /* actually this is not used for inbound queues. yet. */
1776                 atomic_set(&q->busy_siga_counter,0);
1777                 q->timing.busy_start=0;
1778
1779 /*              for (j=0;j<QDIO_STATS_NUMBER;j++)
1780                         q->timing.last_transfer_times[j]=(qdio_get_micros()/
1781                                                           QDIO_STATS_NUMBER)*j;
1782                 q->timing.last_transfer_index=QDIO_STATS_NUMBER-1;
1783 */
1784
1785                 /* fill in slib */
1786                 if (i>0) irq_ptr->input_qs[i-1]->slib->nsliba=
1787                                  (unsigned long)(q->slib);
1788                 q->slib->sla=(unsigned long)(q->sl);
1789                 q->slib->slsba=(unsigned long)(&q->slsb.acc.val[0]);
1790
1791                 /* fill in sl */
1792                 for (j=0;j<QDIO_MAX_BUFFERS_PER_Q;j++)
1793                         q->sl->element[j].sbal=(unsigned long)(q->sbal[j]);
1794
1795                 QDIO_DBF_TEXT2(0,setup,"sl-sb-b0");
1796                 ptr=(void*)q->sl;
1797                 QDIO_DBF_HEX2(0,setup,&ptr,sizeof(void*));
1798                 ptr=(void*)&q->slsb;
1799                 QDIO_DBF_HEX2(0,setup,&ptr,sizeof(void*));
1800                 ptr=(void*)q->sbal[0];
1801                 QDIO_DBF_HEX2(0,setup,&ptr,sizeof(void*));
1802
1803                 /* fill in slsb */
1804                 if (!irq_ptr->is_qebsm) {
1805                         unsigned int count = 1;
1806                         for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; j++)
1807                                 set_slsb(q, &j, SLSB_P_INPUT_NOT_INIT, &count);
1808                 }
1809         }
1810
1811         for (i=0;i<no_output_qs;i++) {
1812                 q=irq_ptr->output_qs[i];
1813                 memset(q,0,((char*)&q->slib)-((char*)q));
1814
1815                 sprintf(dbf_text,"outq%4x",i);
1816                 QDIO_DBF_TEXT0(0,setup,dbf_text);
1817                 QDIO_DBF_HEX0(0,setup,&q,sizeof(void*));
1818
1819                 memset(q->slib,0,PAGE_SIZE);
1820                 q->sl=(struct sl*)(((char*)q->slib)+PAGE_SIZE/2);
1821
1822                 available=0;
1823
1824                 for (j=0;j<QDIO_MAX_BUFFERS_PER_Q;j++)
1825                         q->sbal[j]=*(outbound_sbals_array++);
1826
1827                 q->queue_type=q_format;
1828                 q->int_parm=int_parm;
1829                 q->is_input_q=0;
1830                 q->schid = irq_ptr->schid;
1831                 q->cdev = cdev;
1832                 q->irq_ptr = irq_ptr;
1833                 q->mask=1<<(31-i);
1834                 q->q_no=i;
1835                 q->first_to_check=0;
1836                 q->last_move_ftc=0;
1837                 q->handler=output_handler;
1838
1839                 q->tasklet.data=(unsigned long)q;
1840                 q->tasklet.func=(void(*)(unsigned long))
1841                         &qdio_outbound_processing;
1842
1843                 atomic_set(&q->busy_siga_counter,0);
1844                 q->timing.busy_start=0;
1845
1846                 /* fill in slib */
1847                 if (i>0) irq_ptr->output_qs[i-1]->slib->nsliba=
1848                                  (unsigned long)(q->slib);
1849                 q->slib->sla=(unsigned long)(q->sl);
1850                 q->slib->slsba=(unsigned long)(&q->slsb.acc.val[0]);
1851
1852                 /* fill in sl */
1853                 for (j=0;j<QDIO_MAX_BUFFERS_PER_Q;j++)
1854                         q->sl->element[j].sbal=(unsigned long)(q->sbal[j]);
1855
1856                 QDIO_DBF_TEXT2(0,setup,"sl-sb-b0");
1857                 ptr=(void*)q->sl;
1858                 QDIO_DBF_HEX2(0,setup,&ptr,sizeof(void*));
1859                 ptr=(void*)&q->slsb;
1860                 QDIO_DBF_HEX2(0,setup,&ptr,sizeof(void*));
1861                 ptr=(void*)q->sbal[0];
1862                 QDIO_DBF_HEX2(0,setup,&ptr,sizeof(void*));
1863
1864                 /* fill in slsb */
1865                 if (!irq_ptr->is_qebsm) {
1866                         unsigned int count = 1;
1867                         for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; j++)
1868                                 set_slsb(q, &j, SLSB_P_OUTPUT_NOT_INIT, &count);
1869                 }
1870         }
1871 }
1872
1873 static void
1874 qdio_fill_thresholds(struct qdio_irq *irq_ptr,
1875                      unsigned int no_input_qs,
1876                      unsigned int no_output_qs,
1877                      unsigned int min_input_threshold,
1878                      unsigned int max_input_threshold,
1879                      unsigned int min_output_threshold,
1880                      unsigned int max_output_threshold)
1881 {
1882         int i;
1883         struct qdio_q *q;
1884
1885         for (i=0;i<no_input_qs;i++) {
1886                 q=irq_ptr->input_qs[i];
1887                 q->timing.threshold=max_input_threshold;
1888 /*              for (j=0;j<QDIO_STATS_CLASSES;j++) {
1889                         q->threshold_classes[j].threshold=
1890                                 min_input_threshold+
1891                                 (max_input_threshold-min_input_threshold)/
1892                                 QDIO_STATS_CLASSES;
1893                 }
1894                 qdio_use_thresholds(q,QDIO_STATS_CLASSES/2);*/
1895         }
1896         for (i=0;i<no_output_qs;i++) {
1897                 q=irq_ptr->output_qs[i];
1898                 q->timing.threshold=max_output_threshold;
1899 /*              for (j=0;j<QDIO_STATS_CLASSES;j++) {
1900                         q->threshold_classes[j].threshold=
1901                                 min_output_threshold+
1902                                 (max_output_threshold-min_output_threshold)/
1903                                 QDIO_STATS_CLASSES;
1904                 }
1905                 qdio_use_thresholds(q,QDIO_STATS_CLASSES/2);*/
1906         }
1907 }
1908
1909 static int
1910 tiqdio_thinint_handler(void)
1911 {
1912         QDIO_DBF_TEXT4(0,trace,"thin_int");
1913
1914 #ifdef QDIO_PERFORMANCE_STATS
1915         perf_stats.thinints++;
1916         perf_stats.start_time_inbound=NOW;
1917 #endif /* QDIO_PERFORMANCE_STATS */
1918
1919         /* SVS only when needed:
1920          * issue SVS to benefit from iqdio interrupt avoidance
1921          * (SVS clears AISOI)*/
1922         if (!omit_svs)
1923                 tiqdio_clear_global_summary();
1924
1925         tiqdio_inbound_checks();
1926         return 0;
1927 }
1928
1929 static void
1930 qdio_set_state(struct qdio_irq *irq_ptr, enum qdio_irq_states state)
1931 {
1932         int i;
1933 #ifdef CONFIG_QDIO_DEBUG
1934         char dbf_text[15];
1935
1936         QDIO_DBF_TEXT5(0,trace,"newstate");
1937         sprintf(dbf_text,"%4x%4x",irq_ptr->schid.sch_no,state);
1938         QDIO_DBF_TEXT5(0,trace,dbf_text);
1939 #endif /* CONFIG_QDIO_DEBUG */
1940
1941         irq_ptr->state=state;
1942         for (i=0;i<irq_ptr->no_input_qs;i++)
1943                 irq_ptr->input_qs[i]->state=state;
1944         for (i=0;i<irq_ptr->no_output_qs;i++)
1945                 irq_ptr->output_qs[i]->state=state;
1946         mb();
1947 }
1948
1949 static inline void
1950 qdio_irq_check_sense(struct subchannel_id schid, struct irb *irb)
1951 {
1952         char dbf_text[15];
1953
1954         if (irb->esw.esw0.erw.cons) {
1955                 sprintf(dbf_text,"sens%4x",schid.sch_no);
1956                 QDIO_DBF_TEXT2(1,trace,dbf_text);
1957                 QDIO_DBF_HEX0(0,sense,irb,QDIO_DBF_SENSE_LEN);
1958
1959                 QDIO_PRINT_WARN("sense data available on qdio channel.\n");
1960                 HEXDUMP16(WARN,"irb: ",irb);
1961                 HEXDUMP16(WARN,"sense data: ",irb->ecw);
1962         }
1963
1964 }
1965
1966 static inline void
1967 qdio_handle_pci(struct qdio_irq *irq_ptr)
1968 {
1969         int i;
1970         struct qdio_q *q;
1971
1972 #ifdef QDIO_PERFORMANCE_STATS
1973         perf_stats.pcis++;
1974         perf_stats.start_time_inbound=NOW;
1975 #endif /* QDIO_PERFORMANCE_STATS */
1976         for (i=0;i<irq_ptr->no_input_qs;i++) {
1977                 q=irq_ptr->input_qs[i];
1978                 if (q->is_input_q&QDIO_FLAG_NO_INPUT_INTERRUPT_CONTEXT)
1979                         qdio_mark_q(q);
1980                 else {
1981 #ifdef QDIO_PERFORMANCE_STATS
1982                         perf_stats.tl_runs--;
1983 #endif /* QDIO_PERFORMANCE_STATS */
1984                         __qdio_inbound_processing(q);
1985                 }
1986         }
1987         if (!irq_ptr->hydra_gives_outbound_pcis)
1988                 return;
1989         for (i=0;i<irq_ptr->no_output_qs;i++) {
1990                 q=irq_ptr->output_qs[i];
1991 #ifdef QDIO_PERFORMANCE_STATS
1992                 perf_stats.tl_runs--;
1993 #endif /* QDIO_PERFORMANCE_STATS */
1994                 if (qdio_is_outbound_q_done(q))
1995                         continue;
1996                 if (!irq_ptr->sync_done_on_outb_pcis)
1997                         SYNC_MEMORY;
1998                 __qdio_outbound_processing(q);
1999         }
2000 }
2001
2002 static void qdio_establish_handle_irq(struct ccw_device*, int, int);
2003
2004 static inline void
2005 qdio_handle_activate_check(struct ccw_device *cdev, unsigned long intparm,
2006                            int cstat, int dstat)
2007 {
2008         struct qdio_irq *irq_ptr;
2009         struct qdio_q *q;
2010         char dbf_text[15];
2011
2012         irq_ptr = cdev->private->qdio_data;
2013
2014         QDIO_DBF_TEXT2(1, trace, "ick2");
2015         sprintf(dbf_text,"%s", cdev->dev.bus_id);
2016         QDIO_DBF_TEXT2(1,trace,dbf_text);
2017         QDIO_DBF_HEX2(0,trace,&intparm,sizeof(int));
2018         QDIO_DBF_HEX2(0,trace,&dstat,sizeof(int));
2019         QDIO_DBF_HEX2(0,trace,&cstat,sizeof(int));
2020         QDIO_PRINT_ERR("received check condition on activate " \
2021                        "queues on device %s (cs=x%x, ds=x%x).\n",
2022                        cdev->dev.bus_id, cstat, dstat);
2023         if (irq_ptr->no_input_qs) {
2024                 q=irq_ptr->input_qs[0];
2025         } else if (irq_ptr->no_output_qs) {
2026                 q=irq_ptr->output_qs[0];
2027         } else {
2028                 QDIO_PRINT_ERR("oops... no queue registered for device %s!?\n",
2029                                cdev->dev.bus_id);
2030                 goto omit_handler_call;
2031         }
2032         q->handler(q->cdev,QDIO_STATUS_ACTIVATE_CHECK_CONDITION|
2033                    QDIO_STATUS_LOOK_FOR_ERROR,
2034                    0,0,0,-1,-1,q->int_parm);
2035 omit_handler_call:
2036         qdio_set_state(irq_ptr,QDIO_IRQ_STATE_STOPPED);
2037
2038 }
2039
2040 static void
2041 qdio_call_shutdown(void *data)
2042 {
2043         struct ccw_device *cdev;
2044
2045         cdev = (struct ccw_device *)data;
2046         qdio_shutdown(cdev, QDIO_FLAG_CLEANUP_USING_CLEAR);
2047         put_device(&cdev->dev);
2048 }
2049
2050 static void
2051 qdio_timeout_handler(struct ccw_device *cdev)
2052 {
2053         struct qdio_irq *irq_ptr;
2054         char dbf_text[15];
2055
2056         QDIO_DBF_TEXT2(0, trace, "qtoh");
2057         sprintf(dbf_text, "%s", cdev->dev.bus_id);
2058         QDIO_DBF_TEXT2(0, trace, dbf_text);
2059
2060         irq_ptr = cdev->private->qdio_data;
2061         sprintf(dbf_text, "state:%d", irq_ptr->state);
2062         QDIO_DBF_TEXT2(0, trace, dbf_text);
2063
2064         switch (irq_ptr->state) {
2065         case QDIO_IRQ_STATE_INACTIVE:
2066                 QDIO_PRINT_ERR("establish queues on irq 0.%x.%04x: timed out\n",
2067                                irq_ptr->schid.ssid, irq_ptr->schid.sch_no);
2068                 QDIO_DBF_TEXT2(1,setup,"eq:timeo");
2069                 qdio_set_state(irq_ptr, QDIO_IRQ_STATE_ERR);
2070                 break;
2071         case QDIO_IRQ_STATE_CLEANUP:
2072                 QDIO_PRINT_INFO("Did not get interrupt on cleanup, "
2073                                 "irq=0.%x.%x.\n",
2074                                 irq_ptr->schid.ssid, irq_ptr->schid.sch_no);
2075                 qdio_set_state(irq_ptr, QDIO_IRQ_STATE_ERR);
2076                 break;
2077         case QDIO_IRQ_STATE_ESTABLISHED:
2078         case QDIO_IRQ_STATE_ACTIVE:
2079                 /* I/O has been terminated by common I/O layer. */
2080                 QDIO_PRINT_INFO("Queues on irq 0.%x.%04x killed by cio.\n",
2081                                 irq_ptr->schid.ssid, irq_ptr->schid.sch_no);
2082                 QDIO_DBF_TEXT2(1, trace, "cio:term");
2083                 qdio_set_state(irq_ptr, QDIO_IRQ_STATE_STOPPED);
2084                 if (get_device(&cdev->dev)) {
2085                         /* Can't call shutdown from interrupt context. */
2086                         PREPARE_WORK(&cdev->private->kick_work,
2087                                      qdio_call_shutdown, (void *)cdev);
2088                         queue_work(ccw_device_work, &cdev->private->kick_work);
2089                 }
2090                 break;
2091         default:
2092                 BUG();
2093         }
2094         ccw_device_set_timeout(cdev, 0);
2095         wake_up(&cdev->private->wait_q);
2096 }
2097
2098 static void
2099 qdio_handler(struct ccw_device *cdev, unsigned long intparm, struct irb *irb)
2100 {
2101         struct qdio_irq *irq_ptr;
2102         int cstat,dstat;
2103         char dbf_text[15];
2104
2105 #ifdef CONFIG_QDIO_DEBUG
2106         QDIO_DBF_TEXT4(0, trace, "qint");
2107         sprintf(dbf_text, "%s", cdev->dev.bus_id);
2108         QDIO_DBF_TEXT4(0, trace, dbf_text);
2109 #endif /* CONFIG_QDIO_DEBUG */
2110
2111         if (!intparm) {
2112                 QDIO_PRINT_ERR("got unsolicited interrupt in qdio " \
2113                                   "handler, device %s\n", cdev->dev.bus_id);
2114                 return;
2115         }
2116
2117         irq_ptr = cdev->private->qdio_data;
2118         if (!irq_ptr) {
2119                 QDIO_DBF_TEXT2(1, trace, "uint");
2120                 sprintf(dbf_text,"%s", cdev->dev.bus_id);
2121                 QDIO_DBF_TEXT2(1,trace,dbf_text);
2122                 QDIO_PRINT_ERR("received interrupt on unused device %s!\n",
2123                                cdev->dev.bus_id);
2124                 return;
2125         }
2126
2127         if (IS_ERR(irb)) {
2128                 /* Currently running i/o is in error. */
2129                 switch (PTR_ERR(irb)) {
2130                 case -EIO:
2131                         QDIO_PRINT_ERR("i/o error on device %s\n",
2132                                        cdev->dev.bus_id);
2133                         return;
2134                 case -ETIMEDOUT:
2135                         qdio_timeout_handler(cdev);
2136                         return;
2137                 default:
2138                         QDIO_PRINT_ERR("unknown error state %ld on device %s\n",
2139                                        PTR_ERR(irb), cdev->dev.bus_id);
2140                         return;
2141                 }
2142         }
2143
2144         qdio_irq_check_sense(irq_ptr->schid, irb);
2145
2146 #ifdef CONFIG_QDIO_DEBUG
2147         sprintf(dbf_text, "state:%d", irq_ptr->state);
2148         QDIO_DBF_TEXT4(0, trace, dbf_text);
2149 #endif /* CONFIG_QDIO_DEBUG */
2150
2151         cstat = irb->scsw.cstat;
2152         dstat = irb->scsw.dstat;
2153
2154         switch (irq_ptr->state) {
2155         case QDIO_IRQ_STATE_INACTIVE:
2156                 qdio_establish_handle_irq(cdev, cstat, dstat);
2157                 break;
2158
2159         case QDIO_IRQ_STATE_CLEANUP:
2160                 qdio_set_state(irq_ptr, QDIO_IRQ_STATE_INACTIVE);
2161                 break;
2162
2163         case QDIO_IRQ_STATE_ESTABLISHED:
2164         case QDIO_IRQ_STATE_ACTIVE:
2165                 if (cstat & SCHN_STAT_PCI) {
2166                         qdio_handle_pci(irq_ptr);
2167                         break;
2168                 }
2169
2170                 if ((cstat&~SCHN_STAT_PCI)||dstat) {
2171                         qdio_handle_activate_check(cdev, intparm, cstat, dstat);
2172                         break;
2173                 }
2174         default:
2175                 QDIO_PRINT_ERR("got interrupt for queues in state %d on " \
2176                                "device %s?!\n",
2177                                irq_ptr->state, cdev->dev.bus_id);
2178         }
2179         wake_up(&cdev->private->wait_q);
2180
2181 }
2182
2183 int
2184 qdio_synchronize(struct ccw_device *cdev, unsigned int flags,
2185                  unsigned int queue_number)
2186 {
2187         int cc = 0;
2188         struct qdio_q *q;
2189         struct qdio_irq *irq_ptr;
2190         void *ptr;
2191 #ifdef CONFIG_QDIO_DEBUG
2192         char dbf_text[15]="SyncXXXX";
2193 #endif
2194
2195         irq_ptr = cdev->private->qdio_data;
2196         if (!irq_ptr)
2197                 return -ENODEV;
2198
2199 #ifdef CONFIG_QDIO_DEBUG
2200         *((int*)(&dbf_text[4])) = irq_ptr->schid.sch_no;
2201         QDIO_DBF_HEX4(0,trace,dbf_text,QDIO_DBF_TRACE_LEN);
2202         *((int*)(&dbf_text[0]))=flags;
2203         *((int*)(&dbf_text[4]))=queue_number;
2204         QDIO_DBF_HEX4(0,trace,dbf_text,QDIO_DBF_TRACE_LEN);
2205 #endif /* CONFIG_QDIO_DEBUG */
2206
2207         if (flags&QDIO_FLAG_SYNC_INPUT) {
2208                 q=irq_ptr->input_qs[queue_number];
2209                 if (!q)
2210                         return -EINVAL;
2211                 if (!(irq_ptr->is_qebsm))
2212                         cc = do_siga_sync(q->schid, 0, q->mask);
2213         } else if (flags&QDIO_FLAG_SYNC_OUTPUT) {
2214                 q=irq_ptr->output_qs[queue_number];
2215                 if (!q)
2216                         return -EINVAL;
2217                 if (!(irq_ptr->is_qebsm))
2218                         cc = do_siga_sync(q->schid, q->mask, 0);
2219         } else
2220                 return -EINVAL;
2221
2222         ptr=&cc;
2223         if (cc)
2224                 QDIO_DBF_HEX3(0,trace,&ptr,sizeof(int));
2225
2226         return cc;
2227 }
2228
2229 static inline void
2230 qdio_check_subchannel_qebsm(struct qdio_irq *irq_ptr, unsigned char qdioac,
2231                             unsigned long token)
2232 {
2233         struct qdio_q *q;
2234         int i;
2235         unsigned int count, start_buf;
2236         char dbf_text[15];
2237
2238         /*check if QEBSM is disabled */
2239         if (!(irq_ptr->is_qebsm) || !(qdioac & 0x01)) {
2240                 irq_ptr->is_qebsm  = 0;
2241                 irq_ptr->sch_token = 0;
2242                 irq_ptr->qib.rflags &= ~QIB_RFLAGS_ENABLE_QEBSM;
2243                 QDIO_DBF_TEXT0(0,setup,"noV=V");
2244                 return;
2245         }
2246         irq_ptr->sch_token = token;
2247         /*input queue*/
2248         for (i = 0; i < irq_ptr->no_input_qs;i++) {
2249                 q = irq_ptr->input_qs[i];
2250                 count = QDIO_MAX_BUFFERS_PER_Q;
2251                 start_buf = 0;
2252                 set_slsb(q, &start_buf, SLSB_P_INPUT_NOT_INIT, &count);
2253         }
2254         sprintf(dbf_text,"V=V:%2x",irq_ptr->is_qebsm);
2255         QDIO_DBF_TEXT0(0,setup,dbf_text);
2256         sprintf(dbf_text,"%8lx",irq_ptr->sch_token);
2257         QDIO_DBF_TEXT0(0,setup,dbf_text);
2258         /*output queue*/
2259         for (i = 0; i < irq_ptr->no_output_qs; i++) {
2260                 q = irq_ptr->output_qs[i];
2261                 count = QDIO_MAX_BUFFERS_PER_Q;
2262                 start_buf = 0;
2263                 set_slsb(q, &start_buf, SLSB_P_OUTPUT_NOT_INIT, &count);
2264         }
2265 }
2266
2267 static void
2268 qdio_get_ssqd_information(struct qdio_irq *irq_ptr)
2269 {
2270         int result;
2271         unsigned char qdioac;
2272         struct {
2273                 struct chsc_header request;
2274                 u16 reserved1:10;
2275                 u16 ssid:2;
2276                 u16 fmt:4;
2277                 u16 first_sch;
2278                 u16 reserved2;
2279                 u16 last_sch;
2280                 u32 reserved3;
2281                 struct chsc_header response;
2282                 u32 reserved4;
2283                 u8  flags;
2284                 u8  reserved5;
2285                 u16 sch;
2286                 u8  qfmt;
2287                 u8  parm;
2288                 u8  qdioac1;
2289                 u8  sch_class;
2290                 u8  reserved7;
2291                 u8  icnt;
2292                 u8  reserved8;
2293                 u8  ocnt;
2294                 u8 reserved9;
2295                 u8 mbccnt;
2296                 u16 qdioac2;
2297                 u64 sch_token;
2298         } *ssqd_area;
2299
2300         QDIO_DBF_TEXT0(0,setup,"getssqd");
2301         qdioac = 0;
2302         ssqd_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA);
2303         if (!ssqd_area) {
2304                 QDIO_PRINT_WARN("Could not get memory for chsc. Using all " \
2305                                 "SIGAs for sch x%x.\n", irq_ptr->schid.sch_no);
2306                 irq_ptr->qdioac = CHSC_FLAG_SIGA_INPUT_NECESSARY ||
2307                                   CHSC_FLAG_SIGA_OUTPUT_NECESSARY ||
2308                                   CHSC_FLAG_SIGA_SYNC_NECESSARY; /* all flags set */
2309                 irq_ptr->is_qebsm = 0;
2310                 irq_ptr->sch_token = 0;
2311                 irq_ptr->qib.rflags &= ~QIB_RFLAGS_ENABLE_QEBSM;
2312                 return;
2313         }
2314
2315         ssqd_area->request = (struct chsc_header) {
2316                 .length = 0x0010,
2317                 .code   = 0x0024,
2318         };
2319         ssqd_area->first_sch = irq_ptr->schid.sch_no;
2320         ssqd_area->last_sch = irq_ptr->schid.sch_no;
2321         ssqd_area->ssid = irq_ptr->schid.ssid;
2322         result = chsc(ssqd_area);
2323
2324         if (result) {
2325                 QDIO_PRINT_WARN("CHSC returned cc %i. Using all " \
2326                                 "SIGAs for sch 0.%x.%x.\n", result,
2327                                 irq_ptr->schid.ssid, irq_ptr->schid.sch_no);
2328                 qdioac = CHSC_FLAG_SIGA_INPUT_NECESSARY ||
2329                         CHSC_FLAG_SIGA_OUTPUT_NECESSARY ||
2330                         CHSC_FLAG_SIGA_SYNC_NECESSARY; /* all flags set */
2331                 irq_ptr->is_qebsm  = 0;
2332                 goto out;
2333         }
2334
2335         if (ssqd_area->response.code != QDIO_CHSC_RESPONSE_CODE_OK) {
2336                 QDIO_PRINT_WARN("response upon checking SIGA needs " \
2337                                 "is 0x%x. Using all SIGAs for sch 0.%x.%x.\n",
2338                                 ssqd_area->response.code,
2339                                 irq_ptr->schid.ssid, irq_ptr->schid.sch_no);
2340                 qdioac = CHSC_FLAG_SIGA_INPUT_NECESSARY ||
2341                         CHSC_FLAG_SIGA_OUTPUT_NECESSARY ||
2342                         CHSC_FLAG_SIGA_SYNC_NECESSARY; /* all flags set */
2343                 irq_ptr->is_qebsm  = 0;
2344                 goto out;
2345         }
2346         if (!(ssqd_area->flags & CHSC_FLAG_QDIO_CAPABILITY) ||
2347             !(ssqd_area->flags & CHSC_FLAG_VALIDITY) ||
2348             (ssqd_area->sch != irq_ptr->schid.sch_no)) {
2349                 QDIO_PRINT_WARN("huh? problems checking out sch 0.%x.%x... " \
2350                                 "using all SIGAs.\n",
2351                                 irq_ptr->schid.ssid, irq_ptr->schid.sch_no);
2352                 qdioac = CHSC_FLAG_SIGA_INPUT_NECESSARY |
2353                         CHSC_FLAG_SIGA_OUTPUT_NECESSARY |
2354                         CHSC_FLAG_SIGA_SYNC_NECESSARY; /* worst case */
2355                 irq_ptr->is_qebsm  = 0;
2356                 goto out;
2357         }
2358         qdioac = ssqd_area->qdioac1;
2359 out:
2360         qdio_check_subchannel_qebsm(irq_ptr, qdioac,
2361                                     ssqd_area->sch_token);
2362         free_page ((unsigned long) ssqd_area);
2363         irq_ptr->qdioac = qdioac;
2364 }
2365
2366 static unsigned int
2367 tiqdio_check_chsc_availability(void)
2368 {
2369         char dbf_text[15];
2370
2371         if (!css_characteristics_avail)
2372                 return -EIO;
2373
2374         /* Check for bit 41. */
2375         if (!css_general_characteristics.aif) {
2376                 QDIO_PRINT_WARN("Adapter interruption facility not " \
2377                                 "installed.\n");
2378                 return -ENOENT;
2379         }
2380
2381         /* Check for bits 107 and 108. */
2382         if (!css_chsc_characteristics.scssc ||
2383             !css_chsc_characteristics.scsscf) {
2384                 QDIO_PRINT_WARN("Set Chan Subsys. Char. & Fast-CHSCs " \
2385                                 "not available.\n");
2386                 return -ENOENT;
2387         }
2388
2389         /* Check for OSA/FCP thin interrupts (bit 67). */
2390         hydra_thinints = css_general_characteristics.aif_osa;
2391         sprintf(dbf_text,"hydrati%1x", hydra_thinints);
2392         QDIO_DBF_TEXT0(0,setup,dbf_text);
2393
2394 #ifdef CONFIG_64BIT
2395         /* Check for QEBSM support in general (bit 58). */
2396         is_passthrough = css_general_characteristics.qebsm;
2397 #endif
2398         sprintf(dbf_text,"cssQBS:%1x", is_passthrough);
2399         QDIO_DBF_TEXT0(0,setup,dbf_text);
2400
2401         /* Check for aif time delay disablement fac (bit 56). If installed,
2402          * omit svs even under lpar (good point by rick again) */
2403         omit_svs = css_general_characteristics.aif_tdd;
2404         sprintf(dbf_text,"omitsvs%1x", omit_svs);
2405         QDIO_DBF_TEXT0(0,setup,dbf_text);
2406         return 0;
2407 }
2408
2409
2410 static unsigned int
2411 tiqdio_set_subchannel_ind(struct qdio_irq *irq_ptr, int reset_to_zero)
2412 {
2413         unsigned long real_addr_local_summary_bit;
2414         unsigned long real_addr_dev_st_chg_ind;
2415         void *ptr;
2416         char dbf_text[15];
2417
2418         unsigned int resp_code;
2419         int result;
2420
2421         struct {
2422                 struct chsc_header request;
2423                 u16 operation_code;
2424                 u16 reserved1;
2425                 u32 reserved2;
2426                 u32 reserved3;
2427                 u64 summary_indicator_addr;
2428                 u64 subchannel_indicator_addr;
2429                 u32 ks:4;
2430                 u32 kc:4;
2431                 u32 reserved4:21;
2432                 u32 isc:3;
2433                 u32 word_with_d_bit;
2434                 /* set to 0x10000000 to enable
2435                  * time delay disablement facility */
2436                 u32 reserved5;
2437                 struct subchannel_id schid;
2438                 u32 reserved6[1004];
2439                 struct chsc_header response;
2440                 u32 reserved7;
2441         } *scssc_area;
2442
2443         if (!irq_ptr->is_thinint_irq)
2444                 return -ENODEV;
2445
2446         if (reset_to_zero) {
2447                 real_addr_local_summary_bit=0;
2448                 real_addr_dev_st_chg_ind=0;
2449         } else {
2450                 real_addr_local_summary_bit=
2451                         virt_to_phys((volatile void *)indicators);
2452                 real_addr_dev_st_chg_ind=
2453                         virt_to_phys((volatile void *)irq_ptr->dev_st_chg_ind);
2454         }
2455
2456         scssc_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA);
2457         if (!scssc_area) {
2458                 QDIO_PRINT_WARN("No memory for setting indicators on " \
2459                                 "subchannel 0.%x.%x.\n",
2460                                 irq_ptr->schid.ssid, irq_ptr->schid.sch_no);
2461                 return -ENOMEM;
2462         }
2463         scssc_area->request = (struct chsc_header) {
2464                 .length = 0x0fe0,
2465                 .code   = 0x0021,
2466         };
2467         scssc_area->operation_code = 0;
2468
2469         scssc_area->summary_indicator_addr = real_addr_local_summary_bit;
2470         scssc_area->subchannel_indicator_addr = real_addr_dev_st_chg_ind;
2471         scssc_area->ks = QDIO_STORAGE_KEY;
2472         scssc_area->kc = QDIO_STORAGE_KEY;
2473         scssc_area->isc = TIQDIO_THININT_ISC;
2474         scssc_area->schid = irq_ptr->schid;
2475         /* enables the time delay disablement facility. Don't care
2476          * whether it is really there (i.e. we haven't checked for
2477          * it) */
2478         if (css_general_characteristics.aif_tdd)
2479                 scssc_area->word_with_d_bit = 0x10000000;
2480         else
2481                 QDIO_PRINT_WARN("Time delay disablement facility " \
2482                                 "not available\n");
2483
2484         result = chsc(scssc_area);
2485         if (result) {
2486                 QDIO_PRINT_WARN("could not set indicators on irq 0.%x.%x, " \
2487                                 "cc=%i.\n",
2488                                 irq_ptr->schid.ssid, irq_ptr->schid.sch_no,result);
2489                 result = -EIO;
2490                 goto out;
2491         }
2492
2493         resp_code = scssc_area->response.code;
2494         if (resp_code!=QDIO_CHSC_RESPONSE_CODE_OK) {
2495                 QDIO_PRINT_WARN("response upon setting indicators " \
2496                                 "is 0x%x.\n",resp_code);
2497                 sprintf(dbf_text,"sidR%4x",resp_code);
2498                 QDIO_DBF_TEXT1(0,trace,dbf_text);
2499                 QDIO_DBF_TEXT1(0,setup,dbf_text);
2500                 ptr=&scssc_area->response;
2501                 QDIO_DBF_HEX2(1,setup,&ptr,QDIO_DBF_SETUP_LEN);
2502                 result = -EIO;
2503                 goto out;
2504         }
2505
2506         QDIO_DBF_TEXT2(0,setup,"setscind");
2507         QDIO_DBF_HEX2(0,setup,&real_addr_local_summary_bit,
2508                       sizeof(unsigned long));
2509         QDIO_DBF_HEX2(0,setup,&real_addr_dev_st_chg_ind,sizeof(unsigned long));
2510         result = 0;
2511 out:
2512         free_page ((unsigned long) scssc_area);
2513         return result;
2514
2515 }
2516
2517 static unsigned int
2518 tiqdio_set_delay_target(struct qdio_irq *irq_ptr, unsigned long delay_target)
2519 {
2520         unsigned int resp_code;
2521         int result;
2522         void *ptr;
2523         char dbf_text[15];
2524
2525         struct {
2526                 struct chsc_header request;
2527                 u16 operation_code;
2528                 u16 reserved1;
2529                 u32 reserved2;
2530                 u32 reserved3;
2531                 u32 reserved4[2];
2532                 u32 delay_target;
2533                 u32 reserved5[1009];
2534                 struct chsc_header response;
2535                 u32 reserved6;
2536         } *scsscf_area;
2537
2538         if (!irq_ptr->is_thinint_irq)
2539                 return -ENODEV;
2540
2541         scsscf_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA);
2542         if (!scsscf_area) {
2543                 QDIO_PRINT_WARN("No memory for setting delay target on " \
2544                                 "subchannel 0.%x.%x.\n",
2545                                 irq_ptr->schid.ssid, irq_ptr->schid.sch_no);
2546                 return -ENOMEM;
2547         }
2548         scsscf_area->request = (struct chsc_header) {
2549                 .length = 0x0fe0,
2550                 .code   = 0x1027,
2551         };
2552
2553         scsscf_area->delay_target = delay_target<<16;
2554
2555         result=chsc(scsscf_area);
2556         if (result) {
2557                 QDIO_PRINT_WARN("could not set delay target on irq 0.%x.%x, " \
2558                                 "cc=%i. Continuing.\n",
2559                                 irq_ptr->schid.ssid, irq_ptr->schid.sch_no,
2560                                 result);
2561                 result = -EIO;
2562                 goto out;
2563         }
2564
2565         resp_code = scsscf_area->response.code;
2566         if (resp_code!=QDIO_CHSC_RESPONSE_CODE_OK) {
2567                 QDIO_PRINT_WARN("response upon setting delay target " \
2568                                 "is 0x%x. Continuing.\n",resp_code);
2569                 sprintf(dbf_text,"sdtR%4x",resp_code);
2570                 QDIO_DBF_TEXT1(0,trace,dbf_text);
2571                 QDIO_DBF_TEXT1(0,setup,dbf_text);
2572                 ptr=&scsscf_area->response;
2573                 QDIO_DBF_HEX2(1,trace,&ptr,QDIO_DBF_TRACE_LEN);
2574         }
2575         QDIO_DBF_TEXT2(0,trace,"delytrgt");
2576         QDIO_DBF_HEX2(0,trace,&delay_target,sizeof(unsigned long));
2577         result = 0; /* not critical */
2578 out:
2579         free_page ((unsigned long) scsscf_area);
2580         return result;
2581 }
2582
2583 int
2584 qdio_cleanup(struct ccw_device *cdev, int how)
2585 {
2586         struct qdio_irq *irq_ptr;
2587         char dbf_text[15];
2588         int rc;
2589
2590         irq_ptr = cdev->private->qdio_data;
2591         if (!irq_ptr)
2592                 return -ENODEV;
2593
2594         sprintf(dbf_text,"qcln%4x",irq_ptr->schid.sch_no);
2595         QDIO_DBF_TEXT1(0,trace,dbf_text);
2596         QDIO_DBF_TEXT0(0,setup,dbf_text);
2597
2598         rc = qdio_shutdown(cdev, how);
2599         if ((rc == 0) || (rc == -EINPROGRESS))
2600                 rc = qdio_free(cdev);
2601         return rc;
2602 }
2603
2604 int
2605 qdio_shutdown(struct ccw_device *cdev, int how)
2606 {
2607         struct qdio_irq *irq_ptr;
2608         int i;
2609         int result = 0;
2610         int rc;
2611         unsigned long flags;
2612         int timeout;
2613         char dbf_text[15];
2614
2615         irq_ptr = cdev->private->qdio_data;
2616         if (!irq_ptr)
2617                 return -ENODEV;
2618
2619         down(&irq_ptr->setting_up_sema);
2620
2621         sprintf(dbf_text,"qsqs%4x",irq_ptr->schid.sch_no);
2622         QDIO_DBF_TEXT1(0,trace,dbf_text);
2623         QDIO_DBF_TEXT0(0,setup,dbf_text);
2624
2625         /* mark all qs as uninteresting */
2626         for (i=0;i<irq_ptr->no_input_qs;i++)
2627                 atomic_set(&irq_ptr->input_qs[i]->is_in_shutdown,1);
2628
2629         for (i=0;i<irq_ptr->no_output_qs;i++)
2630                 atomic_set(&irq_ptr->output_qs[i]->is_in_shutdown,1);
2631
2632         tasklet_kill(&tiqdio_tasklet);
2633
2634         for (i=0;i<irq_ptr->no_input_qs;i++) {
2635                 qdio_unmark_q(irq_ptr->input_qs[i]);
2636                 tasklet_kill(&irq_ptr->input_qs[i]->tasklet);
2637                 wait_event_interruptible_timeout(cdev->private->wait_q,
2638                                                  !atomic_read(&irq_ptr->
2639                                                               input_qs[i]->
2640                                                               use_count),
2641                                                  QDIO_NO_USE_COUNT_TIMEOUT);
2642                 if (atomic_read(&irq_ptr->input_qs[i]->use_count))
2643                         result=-EINPROGRESS;
2644         }
2645
2646         for (i=0;i<irq_ptr->no_output_qs;i++) {
2647                 tasklet_kill(&irq_ptr->output_qs[i]->tasklet);
2648                 wait_event_interruptible_timeout(cdev->private->wait_q,
2649                                                  !atomic_read(&irq_ptr->
2650                                                               output_qs[i]->
2651                                                               use_count),
2652                                                  QDIO_NO_USE_COUNT_TIMEOUT);
2653                 if (atomic_read(&irq_ptr->output_qs[i]->use_count))
2654                         result=-EINPROGRESS;
2655         }
2656
2657         /* cleanup subchannel */
2658         spin_lock_irqsave(get_ccwdev_lock(cdev),flags);
2659         if (how&QDIO_FLAG_CLEANUP_USING_CLEAR) {
2660                 rc = ccw_device_clear(cdev, QDIO_DOING_CLEANUP);
2661                 timeout=QDIO_CLEANUP_CLEAR_TIMEOUT;
2662         } else if (how&QDIO_FLAG_CLEANUP_USING_HALT) {
2663                 rc = ccw_device_halt(cdev, QDIO_DOING_CLEANUP);
2664                 timeout=QDIO_CLEANUP_HALT_TIMEOUT;
2665         } else { /* default behaviour */
2666                 rc = ccw_device_halt(cdev, QDIO_DOING_CLEANUP);
2667                 timeout=QDIO_CLEANUP_HALT_TIMEOUT;
2668         }
2669         if (rc == -ENODEV) {
2670                 /* No need to wait for device no longer present. */
2671                 qdio_set_state(irq_ptr, QDIO_IRQ_STATE_INACTIVE);
2672                 spin_unlock_irqrestore(get_ccwdev_lock(cdev), flags);
2673         } else if (((void *)cdev->handler != (void *)qdio_handler) && rc == 0) {
2674                 /*
2675                  * Whoever put another handler there, has to cope with the
2676                  * interrupt theirself. Might happen if qdio_shutdown was
2677                  * called on already shutdown queues, but this shouldn't have
2678                  * bad side effects.
2679                  */
2680                 qdio_set_state(irq_ptr, QDIO_IRQ_STATE_INACTIVE);
2681                 spin_unlock_irqrestore(get_ccwdev_lock(cdev), flags);
2682         } else if (rc == 0) {
2683                 qdio_set_state(irq_ptr, QDIO_IRQ_STATE_CLEANUP);
2684                 ccw_device_set_timeout(cdev, timeout);
2685                 spin_unlock_irqrestore(get_ccwdev_lock(cdev),flags);
2686
2687                 wait_event(cdev->private->wait_q,
2688                            irq_ptr->state == QDIO_IRQ_STATE_INACTIVE ||
2689                            irq_ptr->state == QDIO_IRQ_STATE_ERR);
2690         } else {
2691                 QDIO_PRINT_INFO("ccw_device_{halt,clear} returned %d for "
2692                                 "device %s\n", result, cdev->dev.bus_id);
2693                 spin_unlock_irqrestore(get_ccwdev_lock(cdev), flags);
2694                 result = rc;
2695                 goto out;
2696         }
2697         if (irq_ptr->is_thinint_irq) {
2698                 qdio_put_indicator((__u32*)irq_ptr->dev_st_chg_ind);
2699                 tiqdio_set_subchannel_ind(irq_ptr,1);
2700                 /* reset adapter interrupt indicators */
2701         }
2702
2703         /* exchange int handlers, if necessary */
2704         if ((void*)cdev->handler == (void*)qdio_handler)
2705                 cdev->handler=irq_ptr->original_int_handler;
2706
2707         /* Ignore errors. */
2708         qdio_set_state(irq_ptr, QDIO_IRQ_STATE_INACTIVE);
2709         ccw_device_set_timeout(cdev, 0);
2710 out:
2711         up(&irq_ptr->setting_up_sema);
2712         return result;
2713 }
2714
2715 int
2716 qdio_free(struct ccw_device *cdev)
2717 {
2718         struct qdio_irq *irq_ptr;
2719         char dbf_text[15];
2720
2721         irq_ptr = cdev->private->qdio_data;
2722         if (!irq_ptr)
2723                 return -ENODEV;
2724
2725         down(&irq_ptr->setting_up_sema);
2726
2727         sprintf(dbf_text,"qfqs%4x",irq_ptr->schid.sch_no);
2728         QDIO_DBF_TEXT1(0,trace,dbf_text);
2729         QDIO_DBF_TEXT0(0,setup,dbf_text);
2730
2731         cdev->private->qdio_data = 0;
2732
2733         up(&irq_ptr->setting_up_sema);
2734
2735         qdio_release_irq_memory(irq_ptr);
2736         module_put(THIS_MODULE);
2737         return 0;
2738 }
2739
2740 static inline void
2741 qdio_allocate_do_dbf(struct qdio_initialize *init_data)
2742 {
2743         char dbf_text[20]; /* if a printf printed out more than 8 chars */
2744
2745         sprintf(dbf_text,"qfmt:%x",init_data->q_format);
2746         QDIO_DBF_TEXT0(0,setup,dbf_text);
2747         QDIO_DBF_HEX0(0,setup,init_data->adapter_name,8);
2748         sprintf(dbf_text,"qpff%4x",init_data->qib_param_field_format);
2749         QDIO_DBF_TEXT0(0,setup,dbf_text);
2750         QDIO_DBF_HEX0(0,setup,&init_data->qib_param_field,sizeof(char*));
2751         QDIO_DBF_HEX0(0,setup,&init_data->input_slib_elements,sizeof(long*));
2752         QDIO_DBF_HEX0(0,setup,&init_data->output_slib_elements,sizeof(long*));
2753         sprintf(dbf_text,"miit%4x",init_data->min_input_threshold);
2754         QDIO_DBF_TEXT0(0,setup,dbf_text);
2755         sprintf(dbf_text,"mait%4x",init_data->max_input_threshold);
2756         QDIO_DBF_TEXT0(0,setup,dbf_text);
2757         sprintf(dbf_text,"miot%4x",init_data->min_output_threshold);
2758         QDIO_DBF_TEXT0(0,setup,dbf_text);
2759         sprintf(dbf_text,"maot%4x",init_data->max_output_threshold);
2760         QDIO_DBF_TEXT0(0,setup,dbf_text);
2761         sprintf(dbf_text,"niq:%4x",init_data->no_input_qs);
2762         QDIO_DBF_TEXT0(0,setup,dbf_text);
2763         sprintf(dbf_text,"noq:%4x",init_data->no_output_qs);
2764         QDIO_DBF_TEXT0(0,setup,dbf_text);
2765         QDIO_DBF_HEX0(0,setup,&init_data->input_handler,sizeof(void*));
2766         QDIO_DBF_HEX0(0,setup,&init_data->output_handler,sizeof(void*));
2767         QDIO_DBF_HEX0(0,setup,&init_data->int_parm,sizeof(long));
2768         QDIO_DBF_HEX0(0,setup,&init_data->flags,sizeof(long));
2769         QDIO_DBF_HEX0(0,setup,&init_data->input_sbal_addr_array,sizeof(void*));
2770         QDIO_DBF_HEX0(0,setup,&init_data->output_sbal_addr_array,sizeof(void*));
2771 }
2772
2773 static inline void
2774 qdio_allocate_fill_input_desc(struct qdio_irq *irq_ptr, int i, int iqfmt)
2775 {
2776         irq_ptr->input_qs[i]->is_iqdio_q = iqfmt;
2777         irq_ptr->input_qs[i]->is_thinint_q = irq_ptr->is_thinint_irq;
2778
2779         irq_ptr->qdr->qdf0[i].sliba=(unsigned long)(irq_ptr->input_qs[i]->slib);
2780
2781         irq_ptr->qdr->qdf0[i].sla=(unsigned long)(irq_ptr->input_qs[i]->sl);
2782
2783         irq_ptr->qdr->qdf0[i].slsba=
2784                 (unsigned long)(&irq_ptr->input_qs[i]->slsb.acc.val[0]);
2785
2786         irq_ptr->qdr->qdf0[i].akey=QDIO_STORAGE_KEY;
2787         irq_ptr->qdr->qdf0[i].bkey=QDIO_STORAGE_KEY;
2788         irq_ptr->qdr->qdf0[i].ckey=QDIO_STORAGE_KEY;
2789         irq_ptr->qdr->qdf0[i].dkey=QDIO_STORAGE_KEY;
2790 }
2791
2792 static inline void
2793 qdio_allocate_fill_output_desc(struct qdio_irq *irq_ptr, int i,
2794                                int j, int iqfmt)
2795 {
2796         irq_ptr->output_qs[i]->is_iqdio_q = iqfmt;
2797         irq_ptr->output_qs[i]->is_thinint_q = irq_ptr->is_thinint_irq;
2798
2799         irq_ptr->qdr->qdf0[i+j].sliba=(unsigned long)(irq_ptr->output_qs[i]->slib);
2800
2801         irq_ptr->qdr->qdf0[i+j].sla=(unsigned long)(irq_ptr->output_qs[i]->sl);
2802
2803         irq_ptr->qdr->qdf0[i+j].slsba=
2804                 (unsigned long)(&irq_ptr->output_qs[i]->slsb.acc.val[0]);
2805
2806         irq_ptr->qdr->qdf0[i+j].akey=QDIO_STORAGE_KEY;
2807         irq_ptr->qdr->qdf0[i+j].bkey=QDIO_STORAGE_KEY;
2808         irq_ptr->qdr->qdf0[i+j].ckey=QDIO_STORAGE_KEY;
2809         irq_ptr->qdr->qdf0[i+j].dkey=QDIO_STORAGE_KEY;
2810 }
2811
2812
2813 static inline void
2814 qdio_initialize_set_siga_flags_input(struct qdio_irq *irq_ptr)
2815 {
2816         int i;
2817
2818         for (i=0;i<irq_ptr->no_input_qs;i++) {
2819                 irq_ptr->input_qs[i]->siga_sync=
2820                         irq_ptr->qdioac&CHSC_FLAG_SIGA_SYNC_NECESSARY;
2821                 irq_ptr->input_qs[i]->siga_in=
2822                         irq_ptr->qdioac&CHSC_FLAG_SIGA_INPUT_NECESSARY;
2823                 irq_ptr->input_qs[i]->siga_out=
2824                         irq_ptr->qdioac&CHSC_FLAG_SIGA_OUTPUT_NECESSARY;
2825                 irq_ptr->input_qs[i]->siga_sync_done_on_thinints=
2826                         irq_ptr->qdioac&CHSC_FLAG_SIGA_SYNC_DONE_ON_THININTS;
2827                 irq_ptr->input_qs[i]->hydra_gives_outbound_pcis=
2828                         irq_ptr->hydra_gives_outbound_pcis;
2829                 irq_ptr->input_qs[i]->siga_sync_done_on_outb_tis=
2830                         ((irq_ptr->qdioac&
2831                           (CHSC_FLAG_SIGA_SYNC_DONE_ON_OUTB_PCIS|
2832                            CHSC_FLAG_SIGA_SYNC_DONE_ON_THININTS))==
2833                          (CHSC_FLAG_SIGA_SYNC_DONE_ON_OUTB_PCIS|
2834                           CHSC_FLAG_SIGA_SYNC_DONE_ON_THININTS));
2835
2836         }
2837 }
2838
2839 static inline void
2840 qdio_initialize_set_siga_flags_output(struct qdio_irq *irq_ptr)
2841 {
2842         int i;
2843
2844         for (i=0;i<irq_ptr->no_output_qs;i++) {
2845                 irq_ptr->output_qs[i]->siga_sync=
2846                         irq_ptr->qdioac&CHSC_FLAG_SIGA_SYNC_NECESSARY;
2847                 irq_ptr->output_qs[i]->siga_in=
2848                         irq_ptr->qdioac&CHSC_FLAG_SIGA_INPUT_NECESSARY;
2849                 irq_ptr->output_qs[i]->siga_out=
2850                         irq_ptr->qdioac&CHSC_FLAG_SIGA_OUTPUT_NECESSARY;
2851                 irq_ptr->output_qs[i]->siga_sync_done_on_thinints=
2852                         irq_ptr->qdioac&CHSC_FLAG_SIGA_SYNC_DONE_ON_THININTS;
2853                 irq_ptr->output_qs[i]->hydra_gives_outbound_pcis=
2854                         irq_ptr->hydra_gives_outbound_pcis;
2855                 irq_ptr->output_qs[i]->siga_sync_done_on_outb_tis=
2856                         ((irq_ptr->qdioac&
2857                           (CHSC_FLAG_SIGA_SYNC_DONE_ON_OUTB_PCIS|
2858                            CHSC_FLAG_SIGA_SYNC_DONE_ON_THININTS))==
2859                          (CHSC_FLAG_SIGA_SYNC_DONE_ON_OUTB_PCIS|
2860                           CHSC_FLAG_SIGA_SYNC_DONE_ON_THININTS));
2861
2862         }
2863 }
2864
2865 static inline int
2866 qdio_establish_irq_check_for_errors(struct ccw_device *cdev, int cstat,
2867                                     int dstat)
2868 {
2869         char dbf_text[15];
2870         struct qdio_irq *irq_ptr;
2871
2872         irq_ptr = cdev->private->qdio_data;
2873
2874         if (cstat || (dstat & ~(DEV_STAT_CHN_END|DEV_STAT_DEV_END))) {
2875                 sprintf(dbf_text,"ick1%4x",irq_ptr->schid.sch_no);
2876                 QDIO_DBF_TEXT2(1,trace,dbf_text);
2877                 QDIO_DBF_HEX2(0,trace,&dstat,sizeof(int));
2878                 QDIO_DBF_HEX2(0,trace,&cstat,sizeof(int));
2879                 QDIO_PRINT_ERR("received check condition on establish " \
2880                                "queues on irq 0.%x.%x (cs=x%x, ds=x%x).\n",
2881                                irq_ptr->schid.ssid, irq_ptr->schid.sch_no,
2882                                cstat,dstat);
2883                 qdio_set_state(irq_ptr,QDIO_IRQ_STATE_ERR);
2884         }
2885
2886         if (!(dstat & DEV_STAT_DEV_END)) {
2887                 QDIO_DBF_TEXT2(1,setup,"eq:no de");
2888                 QDIO_DBF_HEX2(0,setup,&dstat, sizeof(dstat));
2889                 QDIO_DBF_HEX2(0,setup,&cstat, sizeof(cstat));
2890                 QDIO_PRINT_ERR("establish queues on irq 0.%x.%04x: didn't get "
2891                                "device end: dstat=%02x, cstat=%02x\n",
2892                                irq_ptr->schid.ssid, irq_ptr->schid.sch_no,
2893                                dstat, cstat);
2894                 qdio_set_state(irq_ptr, QDIO_IRQ_STATE_ERR);
2895                 return 1;
2896         }
2897
2898         if (dstat & ~(DEV_STAT_CHN_END|DEV_STAT_DEV_END)) {
2899                 QDIO_DBF_TEXT2(1,setup,"eq:badio");
2900                 QDIO_DBF_HEX2(0,setup,&dstat, sizeof(dstat));
2901                 QDIO_DBF_HEX2(0,setup,&cstat, sizeof(cstat));
2902                 QDIO_PRINT_ERR("establish queues on irq 0.%x.%04x: got "
2903                                "the following devstat: dstat=%02x, "
2904                                "cstat=%02x\n", irq_ptr->schid.ssid,
2905                                irq_ptr->schid.sch_no, dstat, cstat);
2906                 qdio_set_state(irq_ptr, QDIO_IRQ_STATE_ERR);
2907                 return 1;
2908         }
2909         return 0;
2910 }
2911
2912 static void
2913 qdio_establish_handle_irq(struct ccw_device *cdev, int cstat, int dstat)
2914 {
2915         struct qdio_irq *irq_ptr;
2916         char dbf_text[15];
2917
2918         irq_ptr = cdev->private->qdio_data;
2919
2920         sprintf(dbf_text,"qehi%4x",cdev->private->sch_no);
2921         QDIO_DBF_TEXT0(0,setup,dbf_text);
2922         QDIO_DBF_TEXT0(0,trace,dbf_text);
2923
2924         if (qdio_establish_irq_check_for_errors(cdev, cstat, dstat)) {
2925                 ccw_device_set_timeout(cdev, 0);
2926                 return;
2927         }
2928
2929         qdio_set_state(irq_ptr,QDIO_IRQ_STATE_ESTABLISHED);
2930         ccw_device_set_timeout(cdev, 0);
2931 }
2932
2933 int
2934 qdio_initialize(struct qdio_initialize *init_data)
2935 {
2936         int rc;
2937         char dbf_text[15];
2938
2939         sprintf(dbf_text,"qini%4x",init_data->cdev->private->sch_no);
2940         QDIO_DBF_TEXT0(0,setup,dbf_text);
2941         QDIO_DBF_TEXT0(0,trace,dbf_text);
2942
2943         rc = qdio_allocate(init_data);
2944         if (rc == 0) {
2945                 rc = qdio_establish(init_data);
2946                 if (rc != 0)
2947                         qdio_free(init_data->cdev);
2948         }
2949
2950         return rc;
2951 }
2952
2953
2954 int
2955 qdio_allocate(struct qdio_initialize *init_data)
2956 {
2957         struct qdio_irq *irq_ptr;
2958         char dbf_text[15];
2959
2960         sprintf(dbf_text,"qalc%4x",init_data->cdev->private->sch_no);
2961         QDIO_DBF_TEXT0(0,setup,dbf_text);
2962         QDIO_DBF_TEXT0(0,trace,dbf_text);
2963         if ( (init_data->no_input_qs>QDIO_MAX_QUEUES_PER_IRQ) ||
2964              (init_data->no_output_qs>QDIO_MAX_QUEUES_PER_IRQ) ||
2965              ((init_data->no_input_qs) && (!init_data->input_handler)) ||
2966              ((init_data->no_output_qs) && (!init_data->output_handler)) )
2967                 return -EINVAL;
2968
2969         if (!init_data->input_sbal_addr_array)
2970                 return -EINVAL;
2971
2972         if (!init_data->output_sbal_addr_array)
2973                 return -EINVAL;
2974
2975         qdio_allocate_do_dbf(init_data);
2976
2977         /* create irq */
2978         irq_ptr=kmalloc(sizeof(struct qdio_irq), GFP_KERNEL | GFP_DMA);
2979
2980         QDIO_DBF_TEXT0(0,setup,"irq_ptr:");
2981         QDIO_DBF_HEX0(0,setup,&irq_ptr,sizeof(void*));
2982
2983         if (!irq_ptr) {
2984                 QDIO_PRINT_ERR("kmalloc of irq_ptr failed!\n");
2985                 return -ENOMEM;
2986         }
2987
2988         memset(irq_ptr,0,sizeof(struct qdio_irq));
2989
2990         init_MUTEX(&irq_ptr->setting_up_sema);
2991
2992         /* QDR must be in DMA area since CCW data address is only 32 bit */
2993         irq_ptr->qdr=kmalloc(sizeof(struct qdr), GFP_KERNEL | GFP_DMA);
2994         if (!(irq_ptr->qdr)) {
2995                 kfree(irq_ptr);
2996                 QDIO_PRINT_ERR("kmalloc of irq_ptr->qdr failed!\n");
2997                 return -ENOMEM;
2998         }
2999         QDIO_DBF_TEXT0(0,setup,"qdr:");
3000         QDIO_DBF_HEX0(0,setup,&irq_ptr->qdr,sizeof(void*));
3001
3002         if (qdio_alloc_qs(irq_ptr,
3003                           init_data->no_input_qs,
3004                           init_data->no_output_qs)) {
3005                 qdio_release_irq_memory(irq_ptr);
3006                 return -ENOMEM;
3007         }
3008
3009         init_data->cdev->private->qdio_data = irq_ptr;
3010
3011         qdio_set_state(irq_ptr,QDIO_IRQ_STATE_INACTIVE);
3012
3013         return 0;
3014 }
3015
3016 int qdio_fill_irq(struct qdio_initialize *init_data)
3017 {
3018         int i;
3019         char dbf_text[15];
3020         struct ciw *ciw;
3021         int is_iqdio;
3022         struct qdio_irq *irq_ptr;
3023
3024         irq_ptr = init_data->cdev->private->qdio_data;
3025
3026         memset(irq_ptr,0,((char*)&irq_ptr->qdr)-((char*)irq_ptr));
3027
3028         /* wipes qib.ac, required by ar7063 */
3029         memset(irq_ptr->qdr,0,sizeof(struct qdr));
3030
3031         irq_ptr->int_parm=init_data->int_parm;
3032
3033         irq_ptr->schid = ccw_device_get_subchannel_id(init_data->cdev);
3034         irq_ptr->no_input_qs=init_data->no_input_qs;
3035         irq_ptr->no_output_qs=init_data->no_output_qs;
3036
3037         if (init_data->q_format==QDIO_IQDIO_QFMT) {
3038                 irq_ptr->is_iqdio_irq=1;
3039                 irq_ptr->is_thinint_irq=1;
3040         } else {
3041                 irq_ptr->is_iqdio_irq=0;
3042                 irq_ptr->is_thinint_irq=hydra_thinints;
3043         }
3044         sprintf(dbf_text,"is_i_t%1x%1x",
3045                 irq_ptr->is_iqdio_irq,irq_ptr->is_thinint_irq);
3046         QDIO_DBF_TEXT2(0,setup,dbf_text);
3047
3048         if (irq_ptr->is_thinint_irq) {
3049                 irq_ptr->dev_st_chg_ind = qdio_get_indicator();
3050                 QDIO_DBF_HEX1(0,setup,&irq_ptr->dev_st_chg_ind,sizeof(void*));
3051                 if (!irq_ptr->dev_st_chg_ind) {
3052                         QDIO_PRINT_WARN("no indicator location available " \
3053                                         "for irq 0.%x.%x\n",
3054                                         irq_ptr->schid.ssid, irq_ptr->schid.sch_no);
3055                         qdio_release_irq_memory(irq_ptr);
3056                         return -ENOBUFS;
3057                 }
3058         }
3059
3060         /* defaults */
3061         irq_ptr->equeue.cmd=DEFAULT_ESTABLISH_QS_CMD;
3062         irq_ptr->equeue.count=DEFAULT_ESTABLISH_QS_COUNT;
3063         irq_ptr->aqueue.cmd=DEFAULT_ACTIVATE_QS_CMD;
3064         irq_ptr->aqueue.count=DEFAULT_ACTIVATE_QS_COUNT;
3065
3066         qdio_fill_qs(irq_ptr, init_data->cdev,
3067                      init_data->no_input_qs,
3068                      init_data->no_output_qs,
3069                      init_data->input_handler,
3070                      init_data->output_handler,init_data->int_parm,
3071                      init_data->q_format,init_data->flags,
3072                      init_data->input_sbal_addr_array,
3073                      init_data->output_sbal_addr_array);
3074
3075         if (!try_module_get(THIS_MODULE)) {
3076                 QDIO_PRINT_CRIT("try_module_get() failed!\n");
3077                 qdio_release_irq_memory(irq_ptr);
3078                 return -EINVAL;
3079         }
3080
3081         qdio_fill_thresholds(irq_ptr,init_data->no_input_qs,
3082                              init_data->no_output_qs,
3083                              init_data->min_input_threshold,
3084                              init_data->max_input_threshold,
3085                              init_data->min_output_threshold,
3086                              init_data->max_output_threshold);
3087
3088         /* fill in qdr */
3089         irq_ptr->qdr->qfmt=init_data->q_format;
3090         irq_ptr->qdr->iqdcnt=init_data->no_input_qs;
3091         irq_ptr->qdr->oqdcnt=init_data->no_output_qs;
3092         irq_ptr->qdr->iqdsz=sizeof(struct qdesfmt0)/4; /* size in words */
3093         irq_ptr->qdr->oqdsz=sizeof(struct qdesfmt0)/4;
3094
3095         irq_ptr->qdr->qiba=(unsigned long)&irq_ptr->qib;
3096         irq_ptr->qdr->qkey=QDIO_STORAGE_KEY;
3097
3098         /* fill in qib */
3099         irq_ptr->is_qebsm = is_passthrough;
3100         if (irq_ptr->is_qebsm)
3101                 irq_ptr->qib.rflags |= QIB_RFLAGS_ENABLE_QEBSM;
3102
3103         irq_ptr->qib.qfmt=init_data->q_format;
3104         if (init_data->no_input_qs)
3105                 irq_ptr->qib.isliba=(unsigned long)(irq_ptr->input_qs[0]->slib);
3106         if (init_data->no_output_qs)
3107                 irq_ptr->qib.osliba=(unsigned long)(irq_ptr->output_qs[0]->slib);
3108         memcpy(irq_ptr->qib.ebcnam,init_data->adapter_name,8);
3109
3110         qdio_set_impl_params(irq_ptr,init_data->qib_param_field_format,
3111                              init_data->qib_param_field,
3112                              init_data->no_input_qs,
3113                              init_data->no_output_qs,
3114                              init_data->input_slib_elements,
3115                              init_data->output_slib_elements);
3116
3117         /* first input descriptors, then output descriptors */
3118         is_iqdio = (init_data->q_format == QDIO_IQDIO_QFMT) ? 1 : 0;
3119         for (i=0;i<init_data->no_input_qs;i++)
3120                 qdio_allocate_fill_input_desc(irq_ptr, i, is_iqdio);
3121
3122         for (i=0;i<init_data->no_output_qs;i++)
3123                 qdio_allocate_fill_output_desc(irq_ptr, i,
3124                                                init_data->no_input_qs,
3125                                                is_iqdio);
3126
3127         /* qdr, qib, sls, slsbs, slibs, sbales filled. */
3128
3129         /* get qdio commands */
3130         ciw = ccw_device_get_ciw(init_data->cdev, CIW_TYPE_EQUEUE);
3131         if (!ciw) {
3132                 QDIO_DBF_TEXT2(1,setup,"no eq");
3133                 QDIO_PRINT_INFO("No equeue CIW found for QDIO commands. "
3134                                 "Trying to use default.\n");
3135         } else
3136                 irq_ptr->equeue = *ciw;
3137         ciw = ccw_device_get_ciw(init_data->cdev, CIW_TYPE_AQUEUE);
3138         if (!ciw) {
3139                 QDIO_DBF_TEXT2(1,setup,"no aq");
3140                 QDIO_PRINT_INFO("No aqueue CIW found for QDIO commands. "
3141                                 "Trying to use default.\n");
3142         } else
3143                 irq_ptr->aqueue = *ciw;
3144
3145         /* Set new interrupt handler. */
3146         irq_ptr->original_int_handler = init_data->cdev->handler;
3147         init_data->cdev->handler = qdio_handler;
3148
3149         return 0;
3150 }
3151
3152 int
3153 qdio_establish(struct qdio_initialize *init_data)
3154 {
3155         struct qdio_irq *irq_ptr;
3156         unsigned long saveflags;
3157         int result, result2;
3158         struct ccw_device *cdev;
3159         char dbf_text[20];
3160
3161         cdev=init_data->cdev;
3162         irq_ptr = cdev->private->qdio_data;
3163         if (!irq_ptr)
3164                 return -EINVAL;
3165
3166         if (cdev->private->state != DEV_STATE_ONLINE)
3167                 return -EINVAL;
3168
3169         down(&irq_ptr->setting_up_sema);
3170
3171         qdio_fill_irq(init_data);
3172
3173         /* the thinint CHSC stuff */
3174         if (irq_ptr->is_thinint_irq) {
3175
3176                 result = tiqdio_set_subchannel_ind(irq_ptr,0);
3177                 if (result) {
3178                         up(&irq_ptr->setting_up_sema);
3179                         qdio_shutdown(cdev, QDIO_FLAG_CLEANUP_USING_CLEAR);
3180                         return result;
3181                 }
3182                 tiqdio_set_delay_target(irq_ptr,TIQDIO_DELAY_TARGET);
3183         }
3184
3185         sprintf(dbf_text,"qest%4x",cdev->private->sch_no);
3186         QDIO_DBF_TEXT0(0,setup,dbf_text);
3187         QDIO_DBF_TEXT0(0,trace,dbf_text);
3188
3189         /* establish q */
3190         irq_ptr->ccw.cmd_code=irq_ptr->equeue.cmd;
3191         irq_ptr->ccw.flags=CCW_FLAG_SLI;
3192         irq_ptr->ccw.count=irq_ptr->equeue.count;
3193         irq_ptr->ccw.cda=QDIO_GET_ADDR(irq_ptr->qdr);
3194
3195         spin_lock_irqsave(get_ccwdev_lock(cdev),saveflags);
3196
3197         ccw_device_set_options(cdev, 0);
3198         result=ccw_device_start_timeout(cdev,&irq_ptr->ccw,
3199                                         QDIO_DOING_ESTABLISH,0, 0,
3200                                         QDIO_ESTABLISH_TIMEOUT);
3201         if (result) {
3202                 result2=ccw_device_start_timeout(cdev,&irq_ptr->ccw,
3203                                                  QDIO_DOING_ESTABLISH,0,0,
3204                                                  QDIO_ESTABLISH_TIMEOUT);
3205                 sprintf(dbf_text,"eq:io%4x",result);
3206                 QDIO_DBF_TEXT2(1,setup,dbf_text);
3207                 if (result2) {
3208                         sprintf(dbf_text,"eq:io%4x",result);
3209                         QDIO_DBF_TEXT2(1,setup,dbf_text);
3210                 }
3211                 QDIO_PRINT_WARN("establish queues on irq 0.%x.%04x: do_IO " \
3212                                 "returned %i, next try returned %i\n",
3213                                 irq_ptr->schid.ssid, irq_ptr->schid.sch_no,
3214                                 result, result2);
3215                 result=result2;
3216                 if (result)
3217                         ccw_device_set_timeout(cdev, 0);
3218         }
3219
3220         spin_unlock_irqrestore(get_ccwdev_lock(cdev),saveflags);
3221
3222         if (result) {
3223                 up(&irq_ptr->setting_up_sema);
3224                 qdio_shutdown(cdev,QDIO_FLAG_CLEANUP_USING_CLEAR);
3225                 return result;
3226         }
3227
3228         /* Timeout is cared for already by using ccw_device_start_timeout(). */
3229         wait_event_interruptible(cdev->private->wait_q,
3230                  irq_ptr->state == QDIO_IRQ_STATE_ESTABLISHED ||
3231                  irq_ptr->state == QDIO_IRQ_STATE_ERR);
3232
3233         if (irq_ptr->state == QDIO_IRQ_STATE_ESTABLISHED)
3234                 result = 0;
3235         else {
3236                 up(&irq_ptr->setting_up_sema);
3237                 qdio_shutdown(cdev, QDIO_FLAG_CLEANUP_USING_CLEAR);
3238                 return -EIO;
3239         }
3240
3241         qdio_get_ssqd_information(irq_ptr);
3242         /* if this gets set once, we're running under VM and can omit SVSes */
3243         if (irq_ptr->qdioac&CHSC_FLAG_SIGA_SYNC_NECESSARY)
3244                 omit_svs=1;
3245
3246         sprintf(dbf_text,"qdioac%2x",irq_ptr->qdioac);
3247         QDIO_DBF_TEXT2(0,setup,dbf_text);
3248
3249         sprintf(dbf_text,"qib ac%2x",irq_ptr->qib.ac);
3250         QDIO_DBF_TEXT2(0,setup,dbf_text);
3251
3252         irq_ptr->hydra_gives_outbound_pcis=
3253                 irq_ptr->qib.ac&QIB_AC_OUTBOUND_PCI_SUPPORTED;
3254         irq_ptr->sync_done_on_outb_pcis=
3255                 irq_ptr->qdioac&CHSC_FLAG_SIGA_SYNC_DONE_ON_OUTB_PCIS;
3256
3257         qdio_initialize_set_siga_flags_input(irq_ptr);
3258         qdio_initialize_set_siga_flags_output(irq_ptr);
3259
3260         up(&irq_ptr->setting_up_sema);
3261
3262         return result;
3263
3264 }
3265
3266 int
3267 qdio_activate(struct ccw_device *cdev, int flags)
3268 {
3269         struct qdio_irq *irq_ptr;
3270         int i,result=0,result2;
3271         unsigned long saveflags;
3272         char dbf_text[20]; /* see qdio_initialize */
3273
3274         irq_ptr = cdev->private->qdio_data;
3275         if (!irq_ptr)
3276                 return -ENODEV;
3277
3278         if (cdev->private->state != DEV_STATE_ONLINE)
3279                 return -EINVAL;
3280
3281         down(&irq_ptr->setting_up_sema);
3282         if (irq_ptr->state==QDIO_IRQ_STATE_INACTIVE) {
3283                 result=-EBUSY;
3284                 goto out;
3285         }
3286
3287         sprintf(dbf_text,"qact%4x", irq_ptr->schid.sch_no);
3288         QDIO_DBF_TEXT2(0,setup,dbf_text);
3289         QDIO_DBF_TEXT2(0,trace,dbf_text);
3290
3291         /* activate q */
3292         irq_ptr->ccw.cmd_code=irq_ptr->aqueue.cmd;
3293         irq_ptr->ccw.flags=CCW_FLAG_SLI;
3294         irq_ptr->ccw.count=irq_ptr->aqueue.count;
3295         irq_ptr->ccw.cda=QDIO_GET_ADDR(0);
3296
3297         spin_lock_irqsave(get_ccwdev_lock(cdev),saveflags);
3298
3299         ccw_device_set_timeout(cdev, 0);
3300         ccw_device_set_options(cdev, CCWDEV_REPORT_ALL);
3301         result=ccw_device_start(cdev,&irq_ptr->ccw,QDIO_DOING_ACTIVATE,
3302                                 0, DOIO_DENY_PREFETCH);
3303         if (result) {
3304                 result2=ccw_device_start(cdev,&irq_ptr->ccw,
3305                                          QDIO_DOING_ACTIVATE,0,0);
3306                 sprintf(dbf_text,"aq:io%4x",result);
3307                 QDIO_DBF_TEXT2(1,setup,dbf_text);
3308                 if (result2) {
3309                         sprintf(dbf_text,"aq:io%4x",result);
3310                         QDIO_DBF_TEXT2(1,setup,dbf_text);
3311                 }
3312                 QDIO_PRINT_WARN("activate queues on irq 0.%x.%04x: do_IO " \
3313                                 "returned %i, next try returned %i\n",
3314                                 irq_ptr->schid.ssid, irq_ptr->schid.sch_no,
3315                                 result, result2);
3316                 result=result2;
3317         }
3318
3319         spin_unlock_irqrestore(get_ccwdev_lock(cdev),saveflags);
3320         if (result)
3321                 goto out;
3322
3323         for (i=0;i<irq_ptr->no_input_qs;i++) {
3324                 if (irq_ptr->is_thinint_irq) {
3325                         /*
3326                          * that way we know, that, if we will get interrupted
3327                          * by tiqdio_inbound_processing, qdio_unmark_q will
3328                          * not be called
3329                          */
3330                         qdio_reserve_q(irq_ptr->input_qs[i]);
3331                         qdio_mark_tiq(irq_ptr->input_qs[i]);
3332                         qdio_release_q(irq_ptr->input_qs[i]);
3333                 }
3334         }
3335
3336         if (flags&QDIO_FLAG_NO_INPUT_INTERRUPT_CONTEXT) {
3337                 for (i=0;i<irq_ptr->no_input_qs;i++) {
3338                         irq_ptr->input_qs[i]->is_input_q|=
3339                                 QDIO_FLAG_NO_INPUT_INTERRUPT_CONTEXT;
3340                 }
3341         }
3342
3343         wait_event_interruptible_timeout(cdev->private->wait_q,
3344                                          ((irq_ptr->state ==
3345                                           QDIO_IRQ_STATE_STOPPED) ||
3346                                           (irq_ptr->state ==
3347                                            QDIO_IRQ_STATE_ERR)),
3348                                          QDIO_ACTIVATE_TIMEOUT);
3349
3350         switch (irq_ptr->state) {
3351         case QDIO_IRQ_STATE_STOPPED:
3352         case QDIO_IRQ_STATE_ERR:
3353                 up(&irq_ptr->setting_up_sema);
3354                 qdio_shutdown(cdev, QDIO_FLAG_CLEANUP_USING_CLEAR);
3355                 down(&irq_ptr->setting_up_sema);
3356                 result = -EIO;
3357                 break;
3358         default:
3359                 qdio_set_state(irq_ptr, QDIO_IRQ_STATE_ACTIVE);
3360                 result = 0;
3361         }
3362  out:
3363         up(&irq_ptr->setting_up_sema);
3364
3365         return result;
3366 }
3367
3368 /* buffers filled forwards again to make Rick happy */
3369 static inline void
3370 qdio_do_qdio_fill_input(struct qdio_q *q, unsigned int qidx,
3371                         unsigned int count, struct qdio_buffer *buffers)
3372 {
3373         struct qdio_irq *irq = (struct qdio_irq *) q->irq_ptr;
3374         qidx &= (QDIO_MAX_BUFFERS_PER_Q - 1);
3375         if (irq->is_qebsm) {
3376                 while (count)
3377                         set_slsb(q, &qidx, SLSB_CU_INPUT_EMPTY, &count);
3378                 return;
3379         }
3380         for (;;) {
3381                 set_slsb(q, &qidx, SLSB_CU_INPUT_EMPTY, &count);
3382                 count--;
3383                 if (!count) break;
3384                 qidx = (qidx + 1) & (QDIO_MAX_BUFFERS_PER_Q - 1);
3385         }
3386 }
3387
3388 static inline void
3389 qdio_do_qdio_fill_output(struct qdio_q *q, unsigned int qidx,
3390                          unsigned int count, struct qdio_buffer *buffers)
3391 {
3392         struct qdio_irq *irq = (struct qdio_irq *) q->irq_ptr;
3393
3394         qidx &= (QDIO_MAX_BUFFERS_PER_Q - 1);
3395         if (irq->is_qebsm) {
3396                 while (count)
3397                         set_slsb(q, &qidx, SLSB_CU_OUTPUT_PRIMED, &count);
3398                 return;
3399         }
3400
3401         for (;;) {
3402                 set_slsb(q, &qidx, SLSB_CU_OUTPUT_PRIMED, &count);
3403                 count--;
3404                 if (!count) break;
3405                 qidx = (qidx + 1) & (QDIO_MAX_BUFFERS_PER_Q - 1);
3406         }
3407 }
3408
3409 static inline void
3410 do_qdio_handle_inbound(struct qdio_q *q, unsigned int callflags,
3411                        unsigned int qidx, unsigned int count,
3412                        struct qdio_buffer *buffers)
3413 {
3414         int used_elements;
3415
3416         /* This is the inbound handling of queues */
3417         used_elements=atomic_add_return(count, &q->number_of_buffers_used) - count;
3418
3419         qdio_do_qdio_fill_input(q,qidx,count,buffers);
3420
3421         if ((used_elements+count==QDIO_MAX_BUFFERS_PER_Q)&&
3422             (callflags&QDIO_FLAG_UNDER_INTERRUPT))
3423                 atomic_swap(&q->polling,0);
3424
3425         if (used_elements)
3426                 return;
3427         if (callflags&QDIO_FLAG_DONT_SIGA)
3428                 return;
3429         if (q->siga_in) {
3430                 int result;
3431
3432                 result=qdio_siga_input(q);
3433                 if (result) {
3434                         if (q->siga_error)
3435                                 q->error_status_flags|=
3436                                         QDIO_STATUS_MORE_THAN_ONE_SIGA_ERROR;
3437                         q->error_status_flags|=QDIO_STATUS_LOOK_FOR_ERROR;
3438                         q->siga_error=result;
3439                 }
3440         }
3441
3442         qdio_mark_q(q);
3443 }
3444
3445 static inline void
3446 do_qdio_handle_outbound(struct qdio_q *q, unsigned int callflags,
3447                         unsigned int qidx, unsigned int count,
3448                         struct qdio_buffer *buffers)
3449 {
3450         int used_elements;
3451         unsigned int cnt, start_buf;
3452         unsigned char state = 0;
3453         struct qdio_irq *irq = (struct qdio_irq *) q->irq_ptr;
3454
3455         /* This is the outbound handling of queues */
3456 #ifdef QDIO_PERFORMANCE_STATS
3457         perf_stats.start_time_outbound=NOW;
3458 #endif /* QDIO_PERFORMANCE_STATS */
3459
3460         qdio_do_qdio_fill_output(q,qidx,count,buffers);
3461
3462         used_elements=atomic_add_return(count, &q->number_of_buffers_used) - count;
3463
3464         if (callflags&QDIO_FLAG_DONT_SIGA) {
3465 #ifdef QDIO_PERFORMANCE_STATS
3466                 perf_stats.outbound_time+=NOW-perf_stats.start_time_outbound;
3467                 perf_stats.outbound_cnt++;
3468 #endif /* QDIO_PERFORMANCE_STATS */
3469                 return;
3470         }
3471         if (q->is_iqdio_q) {
3472                 /* one siga for every sbal */
3473                 while (count--)
3474                         qdio_kick_outbound_q(q);
3475
3476                 __qdio_outbound_processing(q);
3477         } else {
3478                 /* under VM, we do a SIGA sync unconditionally */
3479                 SYNC_MEMORY;
3480                 else {
3481                         /*
3482                          * w/o shadow queues (else branch of
3483                          * SYNC_MEMORY :-/ ), we try to
3484                          * fast-requeue buffers
3485                          */
3486                         if (irq->is_qebsm) {
3487                                 cnt = 1;
3488                                 start_buf = ((qidx+QDIO_MAX_BUFFERS_PER_Q-1) &
3489                                              (QDIO_MAX_BUFFERS_PER_Q-1));
3490                                 qdio_do_eqbs(q, &state, &start_buf, &cnt);
3491                         } else
3492                                 state = q->slsb.acc.val[(qidx+QDIO_MAX_BUFFERS_PER_Q-1)
3493                                         &(QDIO_MAX_BUFFERS_PER_Q-1) ];
3494                          if (state != SLSB_CU_OUTPUT_PRIMED) {
3495                                 qdio_kick_outbound_q(q);
3496                         } else {
3497                                 QDIO_DBF_TEXT3(0,trace, "fast-req");
3498 #ifdef QDIO_PERFORMANCE_STATS
3499                                 perf_stats.fast_reqs++;
3500 #endif /* QDIO_PERFORMANCE_STATS */
3501                         }
3502                 }
3503                 /*
3504                  * only marking the q could take too long,
3505                  * the upper layer module could do a lot of
3506                  * traffic in that time
3507                  */
3508                 __qdio_outbound_processing(q);
3509         }
3510
3511 #ifdef QDIO_PERFORMANCE_STATS
3512         perf_stats.outbound_time+=NOW-perf_stats.start_time_outbound;
3513         perf_stats.outbound_cnt++;
3514 #endif /* QDIO_PERFORMANCE_STATS */
3515 }
3516
3517 /* count must be 1 in iqdio */
3518 int
3519 do_QDIO(struct ccw_device *cdev,unsigned int callflags,
3520         unsigned int queue_number, unsigned int qidx,
3521         unsigned int count,struct qdio_buffer *buffers)
3522 {
3523         struct qdio_irq *irq_ptr;
3524 #ifdef CONFIG_QDIO_DEBUG
3525         char dbf_text[20];
3526
3527         sprintf(dbf_text,"doQD%04x",cdev->private->sch_no);
3528         QDIO_DBF_TEXT3(0,trace,dbf_text);
3529 #endif /* CONFIG_QDIO_DEBUG */
3530
3531         if ( (qidx>QDIO_MAX_BUFFERS_PER_Q) ||
3532              (count>QDIO_MAX_BUFFERS_PER_Q) ||
3533              (queue_number>QDIO_MAX_QUEUES_PER_IRQ) )
3534                 return -EINVAL;
3535
3536         if (count==0)
3537                 return 0;
3538
3539         irq_ptr = cdev->private->qdio_data;
3540         if (!irq_ptr)
3541                 return -ENODEV;
3542
3543 #ifdef CONFIG_QDIO_DEBUG
3544         if (callflags&QDIO_FLAG_SYNC_INPUT)
3545                 QDIO_DBF_HEX3(0,trace,&irq_ptr->input_qs[queue_number],
3546                               sizeof(void*));
3547         else
3548                 QDIO_DBF_HEX3(0,trace,&irq_ptr->output_qs[queue_number],
3549                               sizeof(void*));
3550         sprintf(dbf_text,"flag%04x",callflags);
3551         QDIO_DBF_TEXT3(0,trace,dbf_text);
3552         sprintf(dbf_text,"qi%02xct%02x",qidx,count);
3553         QDIO_DBF_TEXT3(0,trace,dbf_text);
3554 #endif /* CONFIG_QDIO_DEBUG */
3555
3556         if (irq_ptr->state!=QDIO_IRQ_STATE_ACTIVE)
3557                 return -EBUSY;
3558
3559         if (callflags&QDIO_FLAG_SYNC_INPUT)
3560                 do_qdio_handle_inbound(irq_ptr->input_qs[queue_number],
3561                                        callflags, qidx, count, buffers);
3562         else if (callflags&QDIO_FLAG_SYNC_OUTPUT)
3563                 do_qdio_handle_outbound(irq_ptr->output_qs[queue_number],
3564                                         callflags, qidx, count, buffers);
3565         else {
3566                 QDIO_DBF_TEXT3(1,trace,"doQD:inv");
3567                 return -EINVAL;
3568         }
3569         return 0;
3570 }
3571
3572 #ifdef QDIO_PERFORMANCE_STATS
3573 static int
3574 qdio_perf_procfile_read(char *buffer, char **buffer_location, off_t offset,
3575                         int buffer_length, int *eof, void *data)
3576 {
3577         int c=0;
3578
3579         /* we are always called with buffer_length=4k, so we all
3580            deliver on the first read */
3581         if (offset>0)
3582                 return 0;
3583
3584 #define _OUTP_IT(x...) c+=sprintf(buffer+c,x)
3585         _OUTP_IT("i_p_nc/c=%lu/%lu\n",i_p_nc,i_p_c);
3586         _OUTP_IT("ii_p_nc/c=%lu/%lu\n",ii_p_nc,ii_p_c);
3587         _OUTP_IT("o_p_nc/c=%lu/%lu\n",o_p_nc,o_p_c);
3588         _OUTP_IT("Number of tasklet runs (total)                  : %u\n",
3589                  perf_stats.tl_runs);
3590         _OUTP_IT("\n");
3591         _OUTP_IT("Number of SIGA sync's issued                    : %u\n",
3592                  perf_stats.siga_syncs);
3593         _OUTP_IT("Number of SIGA in's issued                      : %u\n",
3594                  perf_stats.siga_ins);
3595         _OUTP_IT("Number of SIGA out's issued                     : %u\n",
3596                  perf_stats.siga_outs);
3597         _OUTP_IT("Number of PCIs caught                           : %u\n",
3598                  perf_stats.pcis);
3599         _OUTP_IT("Number of adapter interrupts caught             : %u\n",
3600                  perf_stats.thinints);
3601         _OUTP_IT("Number of fast requeues (outg. SBALs w/o SIGA)  : %u\n",
3602                  perf_stats.fast_reqs);
3603         _OUTP_IT("\n");
3604         _OUTP_IT("Total time of all inbound actions (us) incl. UL : %u\n",
3605                  perf_stats.inbound_time);
3606         _OUTP_IT("Number of inbound transfers                     : %u\n",
3607                  perf_stats.inbound_cnt);
3608         _OUTP_IT("Total time of all outbound do_QDIOs (us)        : %u\n",
3609                  perf_stats.outbound_time);
3610         _OUTP_IT("Number of do_QDIOs outbound                     : %u\n",
3611                  perf_stats.outbound_cnt);
3612         _OUTP_IT("\n");
3613
3614         return c;
3615 }
3616
3617 static struct proc_dir_entry *qdio_perf_proc_file;
3618 #endif /* QDIO_PERFORMANCE_STATS */
3619
3620 static void
3621 qdio_add_procfs_entry(void)
3622 {
3623 #ifdef QDIO_PERFORMANCE_STATS
3624         proc_perf_file_registration=0;
3625         qdio_perf_proc_file=create_proc_entry(QDIO_PERF,
3626                                               S_IFREG|0444,&proc_root);
3627         if (qdio_perf_proc_file) {
3628                 qdio_perf_proc_file->read_proc=&qdio_perf_procfile_read;
3629         } else proc_perf_file_registration=-1;
3630
3631         if (proc_perf_file_registration)
3632                 QDIO_PRINT_WARN("was not able to register perf. " \
3633                                 "proc-file (%i).\n",
3634                                 proc_perf_file_registration);
3635 #endif /* QDIO_PERFORMANCE_STATS */
3636 }
3637
3638 static void
3639 qdio_remove_procfs_entry(void)
3640 {
3641 #ifdef QDIO_PERFORMANCE_STATS
3642         perf_stats.tl_runs=0;
3643
3644         if (!proc_perf_file_registration) /* means if it went ok earlier */
3645                 remove_proc_entry(QDIO_PERF,&proc_root);
3646 #endif /* QDIO_PERFORMANCE_STATS */
3647 }
3648
3649 static void
3650 tiqdio_register_thinints(void)
3651 {
3652         char dbf_text[20];
3653         register_thinint_result=
3654                 s390_register_adapter_interrupt(&tiqdio_thinint_handler);
3655         if (register_thinint_result) {
3656                 sprintf(dbf_text,"regthn%x",(register_thinint_result&0xff));
3657                 QDIO_DBF_TEXT0(0,setup,dbf_text);
3658                 QDIO_PRINT_ERR("failed to register adapter handler " \
3659                                "(rc=%i).\nAdapter interrupts might " \
3660                                "not work. Continuing.\n",
3661                                register_thinint_result);
3662         }
3663 }
3664
3665 static void
3666 tiqdio_unregister_thinints(void)
3667 {
3668         if (!register_thinint_result)
3669                 s390_unregister_adapter_interrupt(&tiqdio_thinint_handler);
3670 }
3671
3672 static int
3673 qdio_get_qdio_memory(void)
3674 {
3675         int i;
3676         indicator_used[0]=1;
3677
3678         for (i=1;i<INDICATORS_PER_CACHELINE;i++)
3679                 indicator_used[i]=0;
3680         indicators=(__u32*)kmalloc(sizeof(__u32)*(INDICATORS_PER_CACHELINE),
3681                                    GFP_KERNEL);
3682         if (!indicators) return -ENOMEM;
3683         memset(indicators,0,sizeof(__u32)*(INDICATORS_PER_CACHELINE));
3684         return 0;
3685 }
3686
3687 static void
3688 qdio_release_qdio_memory(void)
3689 {
3690         kfree(indicators);
3691 }
3692
3693 static void
3694 qdio_unregister_dbf_views(void)
3695 {
3696         if (qdio_dbf_setup)
3697                 debug_unregister(qdio_dbf_setup);
3698         if (qdio_dbf_sbal)
3699                 debug_unregister(qdio_dbf_sbal);
3700         if (qdio_dbf_sense)
3701                 debug_unregister(qdio_dbf_sense);
3702         if (qdio_dbf_trace)
3703                 debug_unregister(qdio_dbf_trace);
3704 #ifdef CONFIG_QDIO_DEBUG
3705         if (qdio_dbf_slsb_out)
3706                 debug_unregister(qdio_dbf_slsb_out);
3707         if (qdio_dbf_slsb_in)
3708                 debug_unregister(qdio_dbf_slsb_in);
3709 #endif /* CONFIG_QDIO_DEBUG */
3710 }
3711
3712 static int
3713 qdio_register_dbf_views(void)
3714 {
3715         qdio_dbf_setup=debug_register(QDIO_DBF_SETUP_NAME,
3716                                       QDIO_DBF_SETUP_PAGES,
3717                                       QDIO_DBF_SETUP_NR_AREAS,
3718                                       QDIO_DBF_SETUP_LEN);
3719         if (!qdio_dbf_setup)
3720                 goto oom;
3721         debug_register_view(qdio_dbf_setup,&debug_hex_ascii_view);
3722         debug_set_level(qdio_dbf_setup,QDIO_DBF_SETUP_LEVEL);
3723
3724         qdio_dbf_sbal=debug_register(QDIO_DBF_SBAL_NAME,
3725                                      QDIO_DBF_SBAL_PAGES,
3726                                      QDIO_DBF_SBAL_NR_AREAS,
3727                                      QDIO_DBF_SBAL_LEN);
3728         if (!qdio_dbf_sbal)
3729                 goto oom;
3730
3731         debug_register_view(qdio_dbf_sbal,&debug_hex_ascii_view);
3732         debug_set_level(qdio_dbf_sbal,QDIO_DBF_SBAL_LEVEL);
3733
3734         qdio_dbf_sense=debug_register(QDIO_DBF_SENSE_NAME,
3735                                       QDIO_DBF_SENSE_PAGES,
3736                                       QDIO_DBF_SENSE_NR_AREAS,
3737                                       QDIO_DBF_SENSE_LEN);
3738         if (!qdio_dbf_sense)
3739                 goto oom;
3740
3741         debug_register_view(qdio_dbf_sense,&debug_hex_ascii_view);
3742         debug_set_level(qdio_dbf_sense,QDIO_DBF_SENSE_LEVEL);
3743
3744         qdio_dbf_trace=debug_register(QDIO_DBF_TRACE_NAME,
3745                                       QDIO_DBF_TRACE_PAGES,
3746                                       QDIO_DBF_TRACE_NR_AREAS,
3747                                       QDIO_DBF_TRACE_LEN);
3748         if (!qdio_dbf_trace)
3749                 goto oom;
3750
3751         debug_register_view(qdio_dbf_trace,&debug_hex_ascii_view);
3752         debug_set_level(qdio_dbf_trace,QDIO_DBF_TRACE_LEVEL);
3753
3754 #ifdef CONFIG_QDIO_DEBUG
3755         qdio_dbf_slsb_out=debug_register(QDIO_DBF_SLSB_OUT_NAME,
3756                                          QDIO_DBF_SLSB_OUT_PAGES,
3757                                          QDIO_DBF_SLSB_OUT_NR_AREAS,
3758                                          QDIO_DBF_SLSB_OUT_LEN);
3759         if (!qdio_dbf_slsb_out)
3760                 goto oom;
3761         debug_register_view(qdio_dbf_slsb_out,&debug_hex_ascii_view);
3762         debug_set_level(qdio_dbf_slsb_out,QDIO_DBF_SLSB_OUT_LEVEL);
3763
3764         qdio_dbf_slsb_in=debug_register(QDIO_DBF_SLSB_IN_NAME,
3765                                         QDIO_DBF_SLSB_IN_PAGES,
3766                                         QDIO_DBF_SLSB_IN_NR_AREAS,
3767                                         QDIO_DBF_SLSB_IN_LEN);
3768         if (!qdio_dbf_slsb_in)
3769                 goto oom;
3770         debug_register_view(qdio_dbf_slsb_in,&debug_hex_ascii_view);
3771         debug_set_level(qdio_dbf_slsb_in,QDIO_DBF_SLSB_IN_LEVEL);
3772 #endif /* CONFIG_QDIO_DEBUG */
3773         return 0;
3774 oom:
3775         QDIO_PRINT_ERR("not enough memory for dbf.\n");
3776         qdio_unregister_dbf_views();
3777         return -ENOMEM;
3778 }
3779
3780 static int __init
3781 init_QDIO(void)
3782 {
3783         int res;
3784 #ifdef QDIO_PERFORMANCE_STATS
3785         void *ptr;
3786 #endif /* QDIO_PERFORMANCE_STATS */
3787
3788         printk("qdio: loading %s\n",version);
3789
3790         res=qdio_get_qdio_memory();
3791         if (res)
3792                 return res;
3793
3794         res = qdio_register_dbf_views();
3795         if (res)
3796                 return res;
3797
3798         QDIO_DBF_TEXT0(0,setup,"initQDIO");
3799
3800 #ifdef QDIO_PERFORMANCE_STATS
3801         memset((void*)&perf_stats,0,sizeof(perf_stats));
3802         QDIO_DBF_TEXT0(0,setup,"perfstat");
3803         ptr=&perf_stats;
3804         QDIO_DBF_HEX0(0,setup,&ptr,sizeof(void*));
3805 #endif /* QDIO_PERFORMANCE_STATS */
3806
3807         qdio_add_procfs_entry();
3808
3809         if (tiqdio_check_chsc_availability())
3810                 QDIO_PRINT_ERR("Not all CHSCs supported. Continuing.\n");
3811
3812         tiqdio_register_thinints();
3813
3814         return 0;
3815  }
3816
3817 static void __exit
3818 cleanup_QDIO(void)
3819 {
3820         tiqdio_unregister_thinints();
3821         qdio_remove_procfs_entry();
3822         qdio_release_qdio_memory();
3823         qdio_unregister_dbf_views();
3824
3825         printk("qdio: %s: module removed\n",version);
3826 }
3827
3828 module_init(init_QDIO);
3829 module_exit(cleanup_QDIO);
3830
3831 EXPORT_SYMBOL(qdio_allocate);
3832 EXPORT_SYMBOL(qdio_establish);
3833 EXPORT_SYMBOL(qdio_initialize);
3834 EXPORT_SYMBOL(qdio_activate);
3835 EXPORT_SYMBOL(do_QDIO);
3836 EXPORT_SYMBOL(qdio_shutdown);
3837 EXPORT_SYMBOL(qdio_free);
3838 EXPORT_SYMBOL(qdio_cleanup);
3839 EXPORT_SYMBOL(qdio_synchronize);