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   1 /*
   2  *
   3  * linux/drivers/s390/cio/qdio.c
   4  *
   5  * Linux for S/390 QDIO base support, Hipersocket base support
   6  * version 2
   7  *
   8  * Copyright 2000,2002 IBM Corporation
   9  * Author(s):             Utz Bacher <utz.bacher@de.ibm.com>
  10  * 2.6 cio integration by Cornelia Huck <cornelia.huck@de.ibm.com>
  11  *
  12  * Restriction: only 63 iqdio subchannels would have its own indicator,
  13  * after that, subsequent subchannels share one indicator
  14  *
  15  *
  16  *
  17  *
  18  * This program is free software; you can redistribute it and/or modify
  19  * it under the terms of the GNU General Public License as published by
  20  * the Free Software Foundation; either version 2, or (at your option)
  21  * any later version.
  22  *
  23  * This program is distributed in the hope that it will be useful,
  24  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  25  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  26  * GNU General Public License for more details.
  27  *
  28  * You should have received a copy of the GNU General Public License
  29  * along with this program; if not, write to the Free Software
  30  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  31  */
  32
  33 #include <linux/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 #include <linux/mempool.h>
  42
  43 #include <asm/ccwdev.h>
  44 #include <asm/io.h>
  45 #include <asm/atomic.h>
  46 #include <asm/semaphore.h>
  47 #include <asm/timex.h>
  48
  49 #include <asm/debug.h>
  50 #include <asm/qdio.h>
  51
  52 #include "cio.h"
  53 #include "css.h"
  54 #include "device.h"
  55 #include "airq.h"
  56 #include "qdio.h"
  57 #include "ioasm.h"
  58 #include "chsc.h"
  59
  60 /****************** MODULE PARAMETER VARIABLES ********************/
  61 MODULE_AUTHOR("Utz Bacher <utz.bacher@de.ibm.com>");
  62 MODULE_DESCRIPTION("QDIO base support version 2, " \
  63                    "Copyright 2000 IBM Corporation");
  64 MODULE_LICENSE("GPL");
  65
  66 /******************** HERE WE GO ***********************************/
  67
  68 static const char version[] = "QDIO base support version 2";
  69
  70 #ifdef QDIO_PERFORMANCE_STATS
  71 static int proc_perf_file_registration;
  72 static unsigned long i_p_c, i_p_nc, o_p_c, o_p_nc, ii_p_c, ii_p_nc;
  73 static struct qdio_perf_stats perf_stats;
  74 #endif /* QDIO_PERFORMANCE_STATS */
  75
  76 static int hydra_thinints;
  77 static int is_passthrough = 0;
  78 static int omit_svs;
  79
  80 static int indicator_used[INDICATORS_PER_CACHELINE];
  81 static __u32 * volatile indicators;
  82 static __u32 volatile spare_indicator;
  83 static atomic_t spare_indicator_usecount;
  84 #define QDIO_MEMPOOL_SCSSC_ELEMENTS 2
  85 static mempool_t *qdio_mempool_scssc;
  86
  87 static debug_info_t *qdio_dbf_setup;
  88 static debug_info_t *qdio_dbf_sbal;
  89 static debug_info_t *qdio_dbf_trace;
  90 static debug_info_t *qdio_dbf_sense;
  91 #ifdef CONFIG_QDIO_DEBUG
  92 static debug_info_t *qdio_dbf_slsb_out;
  93 static debug_info_t *qdio_dbf_slsb_in;
  94 #endif /* CONFIG_QDIO_DEBUG */
  95
  96 /* iQDIO stuff: */
  97 static volatile struct qdio_q *tiq_list=NULL; /* volatile as it could change
  98                                                  during a while loop */
  99 static DEFINE_SPINLOCK(ttiq_list_lock);
 100 static int register_thinint_result;
 101 static void tiqdio_tl(unsigned long);
 102 static DECLARE_TASKLET(tiqdio_tasklet,tiqdio_tl,0);
 103
 104 /* not a macro, as one of the arguments is atomic_read */
 105 static inline int
 106 qdio_min(int a,int b)
 107 {
 108         if (a<b)
 109                 return a;
 110         else
 111                 return b;
 112 }
 113
 114 /***************** SCRUBBER HELPER ROUTINES **********************/
 115
 116 static inline __u64
 117 qdio_get_micros(void)
 118 {
 119         return (get_clock() >> 10); /* time>>12 is microseconds */
 120 }
 121
 122 /*
 123  * unfortunately, we can't just xchg the values; in do_QDIO we want to reserve
 124  * the q in any case, so that we'll not be interrupted when we are in
 125  * qdio_mark_tiq... shouldn't have a really bad impact, as reserving almost
 126  * ever works (last famous words)
 127  */
 128 static inline int
 129 qdio_reserve_q(struct qdio_q *q)
 130 {
 131         return atomic_add_return(1,&q->use_count) - 1;
 132 }
 133
 134 static inline void
 135 qdio_release_q(struct qdio_q *q)
 136 {
 137         atomic_dec(&q->use_count);
 138 }
 139
 140 /*check ccq  */
 141 static inline int
 142 qdio_check_ccq(struct qdio_q *q, unsigned int ccq)
 143 {
 144         char dbf_text[15];
 145
 146         if (ccq == 0 || ccq == 32 || ccq == 96)
 147                 return 0;
 148         if (ccq == 97)
 149                 return 1;
 150         /*notify devices immediately*/
 151         sprintf(dbf_text,"%d", ccq);
 152         QDIO_DBF_TEXT2(1,trace,dbf_text);
 153         return -EIO;
 154 }
 155 /* EQBS: extract buffer states */
 156 static inline int
 157 qdio_do_eqbs(struct qdio_q *q, unsigned char *state,
 158              unsigned int *start, unsigned int *cnt)
 159 {
 160         struct qdio_irq *irq;
 161         unsigned int tmp_cnt, q_no, ccq;
 162         int rc ;
 163         char dbf_text[15];
 164
 165         ccq = 0;
 166         tmp_cnt = *cnt;
 167         irq = (struct qdio_irq*)q->irq_ptr;
 168         q_no = q->q_no;
 169         if(!q->is_input_q)
 170                 q_no += irq->no_input_qs;
 171 again:
 172         ccq = do_eqbs(irq->sch_token, state, q_no, start, cnt);
 173         rc = qdio_check_ccq(q, ccq);
 174         if (rc == 1) {
 175                 QDIO_DBF_TEXT5(1,trace,"eqAGAIN");
 176                 goto again;
 177         }
 178         if (rc < 0) {
 179                 QDIO_DBF_TEXT2(1,trace,"eqberr");
 180                 sprintf(dbf_text,"%2x,%2x,%d,%d",tmp_cnt, *cnt, ccq, q_no);
 181                 QDIO_DBF_TEXT2(1,trace,dbf_text);
 182                 q->handler(q->cdev,QDIO_STATUS_ACTIVATE_CHECK_CONDITION|
 183                                 QDIO_STATUS_LOOK_FOR_ERROR,
 184                                 0, 0, 0, -1, -1, q->int_parm);
 185                 return 0;
 186         }
 187         return (tmp_cnt - *cnt);
 188 }
 189
 190 /* SQBS: set buffer states */
 191 static inline int
 192 qdio_do_sqbs(struct qdio_q *q, unsigned char state,
 193              unsigned int *start, unsigned int *cnt)
 194 {
 195         struct qdio_irq *irq;
 196         unsigned int tmp_cnt, q_no, ccq;
 197         int rc;
 198         char dbf_text[15];
 199
 200         ccq = 0;
 201         tmp_cnt = *cnt;
 202         irq = (struct qdio_irq*)q->irq_ptr;
 203         q_no = q->q_no;
 204         if(!q->is_input_q)
 205                 q_no += irq->no_input_qs;
 206 again:
 207         ccq = do_sqbs(irq->sch_token, state, q_no, start, cnt);
 208         rc = qdio_check_ccq(q, ccq);
 209         if (rc == 1) {
 210                 QDIO_DBF_TEXT5(1,trace,"sqAGAIN");
 211                 goto again;
 212         }
 213         if (rc < 0) {
 214                 QDIO_DBF_TEXT3(1,trace,"sqberr");
 215                 sprintf(dbf_text,"%2x,%2x,%d,%d",tmp_cnt,*cnt,ccq,q_no);
 216                 QDIO_DBF_TEXT3(1,trace,dbf_text);
 217                 q->handler(q->cdev,QDIO_STATUS_ACTIVATE_CHECK_CONDITION|
 218                                 QDIO_STATUS_LOOK_FOR_ERROR,
 219                                 0, 0, 0, -1, -1, q->int_parm);
 220                 return 0;
 221         }
 222         return (tmp_cnt - *cnt);
 223 }
 224
 225 static inline int
 226 qdio_set_slsb(struct qdio_q *q, unsigned int *bufno,
 227               unsigned char state, unsigned int *count)
 228 {
 229         volatile char *slsb;
 230         struct qdio_irq *irq;
 231
 232         irq = (struct qdio_irq*)q->irq_ptr;
 233         if (!irq->is_qebsm) {
 234                 slsb = (char *)&q->slsb.acc.val[(*bufno)];
 235                 xchg(slsb, state);
 236                 return 1;
 237         }
 238         return qdio_do_sqbs(q, state, bufno, count);
 239 }
 240
 241 #ifdef CONFIG_QDIO_DEBUG
 242 static inline void
 243 qdio_trace_slsb(struct qdio_q *q)
 244 {
 245         if (q->queue_type==QDIO_TRACE_QTYPE) {
 246                 if (q->is_input_q)
 247                         QDIO_DBF_HEX2(0,slsb_in,&q->slsb,
 248                                       QDIO_MAX_BUFFERS_PER_Q);
 249                 else
 250                         QDIO_DBF_HEX2(0,slsb_out,&q->slsb,
 251                                       QDIO_MAX_BUFFERS_PER_Q);
 252         }
 253 }
 254 #endif
 255
 256 static inline int
 257 set_slsb(struct qdio_q *q, unsigned int *bufno,
 258          unsigned char state, unsigned int *count)
 259 {
 260         int rc;
 261 #ifdef CONFIG_QDIO_DEBUG
 262         qdio_trace_slsb(q);
 263 #endif
 264         rc = qdio_set_slsb(q, bufno, state, count);
 265 #ifdef CONFIG_QDIO_DEBUG
 266         qdio_trace_slsb(q);
 267 #endif
 268         return rc;
 269 }
 270 static inline int
 271 qdio_siga_sync(struct qdio_q *q, unsigned int gpr2,
 272                unsigned int gpr3)
 273 {
 274         int cc;
 275
 276         QDIO_DBF_TEXT4(0,trace,"sigasync");
 277         QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
 278
 279 #ifdef QDIO_PERFORMANCE_STATS
 280         perf_stats.siga_syncs++;
 281 #endif /* QDIO_PERFORMANCE_STATS */
 282
 283         cc = do_siga_sync(q->schid, gpr2, gpr3);
 284         if (cc)
 285                 QDIO_DBF_HEX3(0,trace,&cc,sizeof(int*));
 286
 287         return cc;
 288 }
 289
 290 static inline int
 291 qdio_siga_sync_q(struct qdio_q *q)
 292 {
 293         if (q->is_input_q)
 294                 return qdio_siga_sync(q, 0, q->mask);
 295         return qdio_siga_sync(q, q->mask, 0);
 296 }
 297
 298 static int
 299 __do_siga_output(struct qdio_q *q, unsigned int *busy_bit)
 300 {
 301        struct qdio_irq *irq;
 302        unsigned int fc = 0;
 303        unsigned long schid;
 304
 305        irq = (struct qdio_irq *) q->irq_ptr;
 306        if (!irq->is_qebsm)
 307                schid = *((u32 *)&q->schid);
 308        else {
 309                schid = irq->sch_token;
 310                fc |= 0x80;
 311        }
 312        return do_siga_output(schid, q->mask, busy_bit, fc);
 313 }
 314
 315 /*
 316  * returns QDIO_SIGA_ERROR_ACCESS_EXCEPTION as cc, when SIGA returns
 317  * an access exception
 318  */
 319 static inline int
 320 qdio_siga_output(struct qdio_q *q)
 321 {
 322         int cc;
 323         __u32 busy_bit;
 324         __u64 start_time=0;
 325
 326 #ifdef QDIO_PERFORMANCE_STATS
 327         perf_stats.siga_outs++;
 328 #endif /* QDIO_PERFORMANCE_STATS */
 329
 330         QDIO_DBF_TEXT4(0,trace,"sigaout");
 331         QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
 332
 333         for (;;) {
 334                 cc = __do_siga_output(q, &busy_bit);
 335 //QDIO_PRINT_ERR("cc=%x, busy=%x\n",cc,busy_bit);
 336                 if ((cc==2) && (busy_bit) && (q->is_iqdio_q)) {
 337                         if (!start_time)
 338                                 start_time=NOW;
 339                         if ((NOW-start_time)>QDIO_BUSY_BIT_PATIENCE)
 340                                 break;
 341                 } else
 342                         break;
 343         }
 344
 345         if ((cc==2) && (busy_bit))
 346                 cc |= QDIO_SIGA_ERROR_B_BIT_SET;
 347
 348         if (cc)
 349                 QDIO_DBF_HEX3(0,trace,&cc,sizeof(int*));
 350
 351         return cc;
 352 }
 353
 354 static inline int
 355 qdio_siga_input(struct qdio_q *q)
 356 {
 357         int cc;
 358
 359         QDIO_DBF_TEXT4(0,trace,"sigain");
 360         QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
 361
 362 #ifdef QDIO_PERFORMANCE_STATS
 363         perf_stats.siga_ins++;
 364 #endif /* QDIO_PERFORMANCE_STATS */
 365
 366         cc = do_siga_input(q->schid, q->mask);
 367
 368         if (cc)
 369                 QDIO_DBF_HEX3(0,trace,&cc,sizeof(int*));
 370
 371         return cc;
 372 }
 373
 374 /* locked by the locks in qdio_activate and qdio_cleanup */
 375 static __u32 *
 376 qdio_get_indicator(void)
 377 {
 378         int i;
 379
 380         for (i=1;i<INDICATORS_PER_CACHELINE;i++)
 381                 if (!indicator_used[i]) {
 382                         indicator_used[i]=1;
 383                         return indicators+i;
 384                 }
 385         atomic_inc(&spare_indicator_usecount);
 386         return (__u32 * volatile) &spare_indicator;
 387 }
 388
 389 /* locked by the locks in qdio_activate and qdio_cleanup */
 390 static void
 391 qdio_put_indicator(__u32 *addr)
 392 {
 393         int i;
 394
 395         if ( (addr) && (addr!=&spare_indicator) ) {
 396                 i=addr-indicators;
 397                 indicator_used[i]=0;
 398         }
 399         if (addr == &spare_indicator)
 400                 atomic_dec(&spare_indicator_usecount);
 401 }
 402
 403 static inline void
 404 tiqdio_clear_summary_bit(__u32 *location)
 405 {
 406         QDIO_DBF_TEXT5(0,trace,"clrsummb");
 407         QDIO_DBF_HEX5(0,trace,&location,sizeof(void*));
 408
 409         xchg(location,0);
 410 }
 411
 412 static inline  void
 413 tiqdio_set_summary_bit(__u32 *location)
 414 {
 415         QDIO_DBF_TEXT5(0,trace,"setsummb");
 416         QDIO_DBF_HEX5(0,trace,&location,sizeof(void*));
 417
 418         xchg(location,-1);
 419 }
 420
 421 static inline void
 422 tiqdio_sched_tl(void)
 423 {
 424         tasklet_hi_schedule(&tiqdio_tasklet);
 425 }
 426
 427 static inline void
 428 qdio_mark_tiq(struct qdio_q *q)
 429 {
 430         unsigned long flags;
 431
 432         QDIO_DBF_TEXT4(0,trace,"mark iq");
 433         QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
 434
 435         spin_lock_irqsave(&ttiq_list_lock,flags);
 436         if (unlikely(atomic_read(&q->is_in_shutdown)))
 437                 goto out_unlock;
 438
 439         if (!q->is_input_q)
 440                 goto out_unlock;
 441
 442         if ((q->list_prev) || (q->list_next))
 443                 goto out_unlock;
 444
 445         if (!tiq_list) {
 446                 tiq_list=q;
 447                 q->list_prev=q;
 448                 q->list_next=q;
 449         } else {
 450                 q->list_next=tiq_list;
 451                 q->list_prev=tiq_list->list_prev;
 452                 tiq_list->list_prev->list_next=q;
 453                 tiq_list->list_prev=q;
 454         }
 455         spin_unlock_irqrestore(&ttiq_list_lock,flags);
 456
 457         tiqdio_set_summary_bit((__u32*)q->dev_st_chg_ind);
 458         tiqdio_sched_tl();
 459         return;
 460 out_unlock:
 461         spin_unlock_irqrestore(&ttiq_list_lock,flags);
 462         return;
 463 }
 464
 465 static inline void
 466 qdio_mark_q(struct qdio_q *q)
 467 {
 468         QDIO_DBF_TEXT4(0,trace,"mark q");
 469         QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
 470
 471         if (unlikely(atomic_read(&q->is_in_shutdown)))
 472                 return;
 473
 474         tasklet_schedule(&q->tasklet);
 475 }
 476
 477 static inline int
 478 qdio_stop_polling(struct qdio_q *q)
 479 {
 480 #ifdef QDIO_USE_PROCESSING_STATE
 481        unsigned int tmp, gsf, count = 1;
 482        unsigned char state = 0;
 483        struct qdio_irq *irq = (struct qdio_irq *) q->irq_ptr;
 484
 485         if (!atomic_swap(&q->polling,0))
 486                 return 1;
 487
 488         QDIO_DBF_TEXT4(0,trace,"stoppoll");
 489         QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
 490
 491         /* show the card that we are not polling anymore */
 492         if (!q->is_input_q)
 493                 return 1;
 494
 495        tmp = gsf = GET_SAVED_FRONTIER(q);
 496        tmp = ((tmp + QDIO_MAX_BUFFERS_PER_Q-1) & (QDIO_MAX_BUFFERS_PER_Q-1) );
 497        set_slsb(q, &tmp, SLSB_P_INPUT_NOT_INIT, &count);
 498
 499         /*
 500          * we don't issue this SYNC_MEMORY, as we trust Rick T and
 501          * moreover will not use the PROCESSING state under VM, so
 502          * q->polling was 0 anyway
 503          */
 504         /*SYNC_MEMORY;*/
 505        if (irq->is_qebsm) {
 506                count = 1;
 507                qdio_do_eqbs(q, &state, &gsf, &count);
 508        } else
 509                state = q->slsb.acc.val[gsf];
 510        if (state != SLSB_P_INPUT_PRIMED)
 511                 return 1;
 512         /*
 513          * set our summary bit again, as otherwise there is a
 514          * small window we can miss between resetting it and
 515          * checking for PRIMED state
 516          */
 517         if (q->is_thinint_q)
 518                 tiqdio_set_summary_bit((__u32*)q->dev_st_chg_ind);
 519         return 0;
 520
 521 #else /* QDIO_USE_PROCESSING_STATE */
 522         return 1;
 523 #endif /* QDIO_USE_PROCESSING_STATE */
 524 }
 525
 526 /*
 527  * see the comment in do_QDIO and before qdio_reserve_q about the
 528  * sophisticated locking outside of unmark_q, so that we don't need to
 529  * disable the interrupts :-)
 530 */
 531 static inline void
 532 qdio_unmark_q(struct qdio_q *q)
 533 {
 534         unsigned long flags;
 535
 536         QDIO_DBF_TEXT4(0,trace,"unmark q");
 537         QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
 538
 539         if ((!q->list_prev)||(!q->list_next))
 540                 return;
 541
 542         if ((q->is_thinint_q)&&(q->is_input_q)) {
 543                 /* iQDIO */
 544                 spin_lock_irqsave(&ttiq_list_lock,flags);
 545                 /* in case cleanup has done this already and simultanously
 546                  * qdio_unmark_q is called from the interrupt handler, we've
 547                  * got to check this in this specific case again */
 548                 if ((!q->list_prev)||(!q->list_next))
 549                         goto out;
 550                 if (q->list_next==q) {
 551                         /* q was the only interesting q */
 552                         tiq_list=NULL;
 553                         q->list_next=NULL;
 554                         q->list_prev=NULL;
 555                 } else {
 556                         q->list_next->list_prev=q->list_prev;
 557                         q->list_prev->list_next=q->list_next;
 558                         tiq_list=q->list_next;
 559                         q->list_next=NULL;
 560                         q->list_prev=NULL;
 561                 }
 562 out:
 563                 spin_unlock_irqrestore(&ttiq_list_lock,flags);
 564         }
 565 }
 566
 567 static inline unsigned long
 568 tiqdio_clear_global_summary(void)
 569 {
 570         unsigned long time;
 571
 572         QDIO_DBF_TEXT5(0,trace,"clrglobl");
 573
 574         time = do_clear_global_summary();
 575
 576         QDIO_DBF_HEX5(0,trace,&time,sizeof(unsigned long));
 577
 578         return time;
 579 }
 580
 581
 582 /************************* OUTBOUND ROUTINES *******************************/
 583 static int
 584 qdio_qebsm_get_outbound_buffer_frontier(struct qdio_q *q)
 585 {
 586         struct qdio_irq *irq;
 587         unsigned char state;
 588         unsigned int cnt, count, ftc;
 589
 590         irq = (struct qdio_irq *) q->irq_ptr;
 591         if ((!q->is_iqdio_q) && (!q->hydra_gives_outbound_pcis))
 592                 SYNC_MEMORY;
 593
 594         ftc = q->first_to_check;
 595         count = qdio_min(atomic_read(&q->number_of_buffers_used),
 596                         (QDIO_MAX_BUFFERS_PER_Q-1));
 597         if (count == 0)
 598                 return q->first_to_check;
 599         cnt = qdio_do_eqbs(q, &state, &ftc, &count);
 600         if (cnt == 0)
 601                 return q->first_to_check;
 602         switch (state) {
 603         case SLSB_P_OUTPUT_ERROR:
 604                 QDIO_DBF_TEXT3(0,trace,"outperr");
 605                 atomic_sub(cnt , &q->number_of_buffers_used);
 606                 if (q->qdio_error)
 607                         q->error_status_flags |=
 608                                 QDIO_STATUS_MORE_THAN_ONE_QDIO_ERROR;
 609                 q->qdio_error = SLSB_P_OUTPUT_ERROR;
 610                 q->error_status_flags |= QDIO_STATUS_LOOK_FOR_ERROR;
 611                 q->first_to_check = ftc;
 612                 break;
 613         case SLSB_P_OUTPUT_EMPTY:
 614                 QDIO_DBF_TEXT5(0,trace,"outpempt");
 615                 atomic_sub(cnt, &q->number_of_buffers_used);
 616                 q->first_to_check = ftc;
 617                 break;
 618         case SLSB_CU_OUTPUT_PRIMED:
 619                 /* all buffers primed */
 620                 QDIO_DBF_TEXT5(0,trace,"outpprim");
 621                 break;
 622         default:
 623                 break;
 624         }
 625         QDIO_DBF_HEX4(0,trace,&q->first_to_check,sizeof(int));
 626         return q->first_to_check;
 627 }
 628
 629 static int
 630 qdio_qebsm_get_inbound_buffer_frontier(struct qdio_q *q)
 631 {
 632         struct qdio_irq *irq;
 633         unsigned char state;
 634         int tmp, ftc, count, cnt;
 635         char dbf_text[15];
 636
 637
 638         irq = (struct qdio_irq *) q->irq_ptr;
 639         ftc = q->first_to_check;
 640         count = qdio_min(atomic_read(&q->number_of_buffers_used),
 641                         (QDIO_MAX_BUFFERS_PER_Q-1));
 642         if (count == 0)
 643                  return q->first_to_check;
 644         cnt = qdio_do_eqbs(q, &state, &ftc, &count);
 645         if (cnt == 0)
 646                  return q->first_to_check;
 647         switch (state) {
 648         case SLSB_P_INPUT_ERROR :
 649 #ifdef CONFIG_QDIO_DEBUG
 650                 QDIO_DBF_TEXT3(1,trace,"inperr");
 651                 sprintf(dbf_text,"%2x,%2x",ftc,count);
 652                 QDIO_DBF_TEXT3(1,trace,dbf_text);
 653 #endif /* CONFIG_QDIO_DEBUG */
 654                 if (q->qdio_error)
 655                         q->error_status_flags |=
 656                                 QDIO_STATUS_MORE_THAN_ONE_QDIO_ERROR;
 657                 q->qdio_error = SLSB_P_INPUT_ERROR;
 658                 q->error_status_flags |= QDIO_STATUS_LOOK_FOR_ERROR;
 659                 atomic_sub(cnt, &q->number_of_buffers_used);
 660                 q->first_to_check = ftc;
 661                 break;
 662         case SLSB_P_INPUT_PRIMED :
 663                 QDIO_DBF_TEXT3(0,trace,"inptprim");
 664                 sprintf(dbf_text,"%2x,%2x",ftc,count);
 665                 QDIO_DBF_TEXT3(1,trace,dbf_text);
 666                 tmp = 0;
 667                 ftc = q->first_to_check;
 668 #ifdef QDIO_USE_PROCESSING_STATE
 669                 if (cnt > 1) {
 670                         cnt -= 1;
 671                         tmp = set_slsb(q, &ftc, SLSB_P_INPUT_NOT_INIT, &cnt);
 672                         if (!tmp)
 673                                 break;
 674                 }
 675                 cnt = 1;
 676                 tmp += set_slsb(q, &ftc,
 677                                SLSB_P_INPUT_PROCESSING, &cnt);
 678                 atomic_set(&q->polling, 1);
 679 #else
 680                 tmp = set_slsb(q, &ftc, SLSB_P_INPUT_NOT_INIT, &cnt);
 681 #endif
 682                 atomic_sub(tmp, &q->number_of_buffers_used);
 683                 q->first_to_check = ftc;
 684                 break;
 685         case SLSB_CU_INPUT_EMPTY:
 686         case SLSB_P_INPUT_NOT_INIT:
 687         case SLSB_P_INPUT_PROCESSING:
 688                 QDIO_DBF_TEXT5(0,trace,"inpnipro");
 689                 break;
 690         default:
 691                 break;
 692         }
 693         QDIO_DBF_HEX4(0,trace,&q->first_to_check,sizeof(int));
 694         return q->first_to_check;
 695 }
 696
 697 static inline int
 698 qdio_get_outbound_buffer_frontier(struct qdio_q *q)
 699 {
 700         struct qdio_irq *irq;
 701         volatile char *slsb;
 702         unsigned int count = 1;
 703         int first_not_to_check, f, f_mod_no;
 704         char dbf_text[15];
 705
 706         QDIO_DBF_TEXT4(0,trace,"getobfro");
 707         QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
 708
 709         irq = (struct qdio_irq *) q->irq_ptr;
 710         if (irq->is_qebsm)
 711                 return qdio_qebsm_get_outbound_buffer_frontier(q);
 712
 713         slsb=&q->slsb.acc.val[0];
 714         f_mod_no=f=q->first_to_check;
 715         /*
 716          * f points to already processed elements, so f+no_used is correct...
 717          * ... but: we don't check 128 buffers, as otherwise
 718          * qdio_has_outbound_q_moved would return 0
 719          */
 720         first_not_to_check=f+qdio_min(atomic_read(&q->number_of_buffers_used),
 721                                       (QDIO_MAX_BUFFERS_PER_Q-1));
 722
 723         if ((!q->is_iqdio_q)&&(!q->hydra_gives_outbound_pcis))
 724                 SYNC_MEMORY;
 725
 726 check_next:
 727         if (f==first_not_to_check)
 728                 goto out;
 729
 730         switch(slsb[f_mod_no]) {
 731
 732         /* the adapter has not fetched the output yet */
 733         case SLSB_CU_OUTPUT_PRIMED:
 734                 QDIO_DBF_TEXT5(0,trace,"outpprim");
 735                 break;
 736
 737         /* the adapter got it */
 738         case SLSB_P_OUTPUT_EMPTY:
 739                 atomic_dec(&q->number_of_buffers_used);
 740                 f++;
 741                 f_mod_no=f&(QDIO_MAX_BUFFERS_PER_Q-1);
 742                 QDIO_DBF_TEXT5(0,trace,"outpempt");
 743                 goto check_next;
 744
 745         case SLSB_P_OUTPUT_ERROR:
 746                 QDIO_DBF_TEXT3(0,trace,"outperr");
 747                 sprintf(dbf_text,"%x-%x-%x",f_mod_no,
 748                         q->sbal[f_mod_no]->element[14].sbalf.value,
 749                         q->sbal[f_mod_no]->element[15].sbalf.value);
 750                 QDIO_DBF_TEXT3(1,trace,dbf_text);
 751                 QDIO_DBF_HEX2(1,sbal,q->sbal[f_mod_no],256);
 752
 753                 /* kind of process the buffer */
 754                 set_slsb(q, &f_mod_no, SLSB_P_OUTPUT_NOT_INIT, &count);
 755
 756                 /*
 757                  * we increment the frontier, as this buffer
 758                  * was processed obviously
 759                  */
 760                 atomic_dec(&q->number_of_buffers_used);
 761                 f_mod_no=(f_mod_no+1)&(QDIO_MAX_BUFFERS_PER_Q-1);
 762
 763                 if (q->qdio_error)
 764                         q->error_status_flags|=
 765                                 QDIO_STATUS_MORE_THAN_ONE_QDIO_ERROR;
 766                 q->qdio_error=SLSB_P_OUTPUT_ERROR;
 767                 q->error_status_flags|=QDIO_STATUS_LOOK_FOR_ERROR;
 768
 769                 break;
 770
 771         /* no new buffers */
 772         default:
 773                 QDIO_DBF_TEXT5(0,trace,"outpni");
 774         }
 775 out:
 776         return (q->first_to_check=f_mod_no);
 777 }
 778
 779 /* all buffers are processed */
 780 static inline int
 781 qdio_is_outbound_q_done(struct qdio_q *q)
 782 {
 783         int no_used;
 784 #ifdef CONFIG_QDIO_DEBUG
 785         char dbf_text[15];
 786 #endif
 787
 788         no_used=atomic_read(&q->number_of_buffers_used);
 789
 790 #ifdef CONFIG_QDIO_DEBUG
 791         if (no_used) {
 792                 sprintf(dbf_text,"oqisnt%02x",no_used);
 793                 QDIO_DBF_TEXT4(0,trace,dbf_text);
 794         } else {
 795                 QDIO_DBF_TEXT4(0,trace,"oqisdone");
 796         }
 797         QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
 798 #endif /* CONFIG_QDIO_DEBUG */
 799         return (no_used==0);
 800 }
 801
 802 static inline int
 803 qdio_has_outbound_q_moved(struct qdio_q *q)
 804 {
 805         int i;
 806
 807         i=qdio_get_outbound_buffer_frontier(q);
 808
 809         if ( (i!=GET_SAVED_FRONTIER(q)) ||
 810              (q->error_status_flags&QDIO_STATUS_LOOK_FOR_ERROR) ) {
 811                 SAVE_FRONTIER(q,i);
 812                 QDIO_DBF_TEXT4(0,trace,"oqhasmvd");
 813                 QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
 814                 return 1;
 815         } else {
 816                 QDIO_DBF_TEXT4(0,trace,"oqhsntmv");
 817                 QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
 818                 return 0;
 819         }
 820 }
 821
 822 static inline void
 823 qdio_kick_outbound_q(struct qdio_q *q)
 824 {
 825         int result;
 826 #ifdef CONFIG_QDIO_DEBUG
 827         char dbf_text[15];
 828
 829         QDIO_DBF_TEXT4(0,trace,"kickoutq");
 830         QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
 831 #endif /* CONFIG_QDIO_DEBUG */
 832
 833         if (!q->siga_out)
 834                 return;
 835
 836         /* here's the story with cc=2 and busy bit set (thanks, Rick):
 837          * VM's CP could present us cc=2 and busy bit set on SIGA-write
 838          * during reconfiguration of their Guest LAN (only in HIPERS mode,
 839          * QDIO mode is asynchronous -- cc=2 and busy bit there will take
 840          * the queues down immediately; and not being under VM we have a
 841          * problem on cc=2 and busy bit set right away).
 842          *
 843          * Therefore qdio_siga_output will try for a short time constantly,
 844          * if such a condition occurs. If it doesn't change, it will
 845          * increase the busy_siga_counter and save the timestamp, and
 846          * schedule the queue for later processing (via mark_q, using the
 847          * queue tasklet). __qdio_outbound_processing will check out the
 848          * counter. If non-zero, it will call qdio_kick_outbound_q as often
 849          * as the value of the counter. This will attempt further SIGA
 850          * instructions. For each successful SIGA, the counter is
 851          * decreased, for failing SIGAs the counter remains the same, after
 852          * all.
 853          * After some time of no movement, qdio_kick_outbound_q will
 854          * finally fail and reflect corresponding error codes to call
 855          * the upper layer module and have it take the queues down.
 856          *
 857          * Note that this is a change from the original HiperSockets design
 858          * (saying cc=2 and busy bit means take the queues down), but in
 859          * these days Guest LAN didn't exist... excessive cc=2 with busy bit
 860          * conditions will still take the queues down, but the threshold is
 861          * higher due to the Guest LAN environment.
 862          */
 863
 864
 865         result=qdio_siga_output(q);
 866
 867         switch (result) {
 868         case 0:
 869                 /* went smooth this time, reset timestamp */
 870 #ifdef CONFIG_QDIO_DEBUG
 871                 QDIO_DBF_TEXT3(0,trace,"cc2reslv");
 872                 sprintf(dbf_text,"%4x%2x%2x",q->schid.sch_no,q->q_no,
 873                         atomic_read(&q->busy_siga_counter));
 874                 QDIO_DBF_TEXT3(0,trace,dbf_text);
 875 #endif /* CONFIG_QDIO_DEBUG */
 876                 q->timing.busy_start=0;
 877                 break;
 878         case (2|QDIO_SIGA_ERROR_B_BIT_SET):
 879                 /* cc=2 and busy bit: */
 880                 atomic_inc(&q->busy_siga_counter);
 881
 882                 /* if the last siga was successful, save
 883                  * timestamp here */
 884                 if (!q->timing.busy_start)
 885                         q->timing.busy_start=NOW;
 886
 887                 /* if we're in time, don't touch error_status_flags
 888                  * and siga_error */
 889                 if (NOW-q->timing.busy_start<QDIO_BUSY_BIT_GIVE_UP) {
 890                         qdio_mark_q(q);
 891                         break;
 892                 }
 893                 QDIO_DBF_TEXT2(0,trace,"cc2REPRT");
 894 #ifdef CONFIG_QDIO_DEBUG
 895                 sprintf(dbf_text,"%4x%2x%2x",q->schid.sch_no,q->q_no,
 896                         atomic_read(&q->busy_siga_counter));
 897                 QDIO_DBF_TEXT3(0,trace,dbf_text);
 898 #endif /* CONFIG_QDIO_DEBUG */
 899                 /* else fallthrough and report error */
 900         default:
 901                 /* for plain cc=1, 2 or 3: */
 902                 if (q->siga_error)
 903                         q->error_status_flags|=
 904                                 QDIO_STATUS_MORE_THAN_ONE_SIGA_ERROR;
 905                 q->error_status_flags|=
 906                         QDIO_STATUS_LOOK_FOR_ERROR;
 907                 q->siga_error=result;
 908         }
 909 }
 910
 911 static inline void
 912 qdio_kick_outbound_handler(struct qdio_q *q)
 913 {
 914         int start, end, real_end, count;
 915 #ifdef CONFIG_QDIO_DEBUG
 916         char dbf_text[15];
 917 #endif
 918
 919         start = q->first_element_to_kick;
 920         /* last_move_ftc was just updated */
 921         real_end = GET_SAVED_FRONTIER(q);
 922         end = (real_end+QDIO_MAX_BUFFERS_PER_Q-1)&
 923                 (QDIO_MAX_BUFFERS_PER_Q-1);
 924         count = (end+QDIO_MAX_BUFFERS_PER_Q+1-start)&
 925                 (QDIO_MAX_BUFFERS_PER_Q-1);
 926
 927 #ifdef CONFIG_QDIO_DEBUG
 928         QDIO_DBF_TEXT4(0,trace,"kickouth");
 929         QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
 930
 931         sprintf(dbf_text,"s=%2xc=%2x",start,count);
 932         QDIO_DBF_TEXT4(0,trace,dbf_text);
 933 #endif /* CONFIG_QDIO_DEBUG */
 934
 935         if (q->state==QDIO_IRQ_STATE_ACTIVE)
 936                 q->handler(q->cdev,QDIO_STATUS_OUTBOUND_INT|
 937                            q->error_status_flags,
 938                            q->qdio_error,q->siga_error,q->q_no,start,count,
 939                            q->int_parm);
 940
 941         /* for the next time: */
 942         q->first_element_to_kick=real_end;
 943         q->qdio_error=0;
 944         q->siga_error=0;
 945         q->error_status_flags=0;
 946 }
 947
 948 static inline void
 949 __qdio_outbound_processing(struct qdio_q *q)
 950 {
 951         int siga_attempts;
 952
 953         QDIO_DBF_TEXT4(0,trace,"qoutproc");
 954         QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
 955
 956         if (unlikely(qdio_reserve_q(q))) {
 957                 qdio_release_q(q);
 958 #ifdef QDIO_PERFORMANCE_STATS
 959                 o_p_c++;
 960 #endif /* QDIO_PERFORMANCE_STATS */
 961                 /* as we're sissies, we'll check next time */
 962                 if (likely(!atomic_read(&q->is_in_shutdown))) {
 963                         qdio_mark_q(q);
 964                         QDIO_DBF_TEXT4(0,trace,"busy,agn");
 965                 }
 966                 return;
 967         }
 968 #ifdef QDIO_PERFORMANCE_STATS
 969         o_p_nc++;
 970         perf_stats.tl_runs++;
 971 #endif /* QDIO_PERFORMANCE_STATS */
 972
 973         /* see comment in qdio_kick_outbound_q */
 974         siga_attempts=atomic_read(&q->busy_siga_counter);
 975         while (siga_attempts) {
 976                 atomic_dec(&q->busy_siga_counter);
 977                 qdio_kick_outbound_q(q);
 978                 siga_attempts--;
 979         }
 980
 981         if (qdio_has_outbound_q_moved(q))
 982                 qdio_kick_outbound_handler(q);
 983
 984         if (q->is_iqdio_q) {
 985                 /*
 986                  * for asynchronous queues, we better check, if the fill
 987                  * level is too high. for synchronous queues, the fill
 988                  * level will never be that high.
 989                  */
 990                 if (atomic_read(&q->number_of_buffers_used)>
 991                     IQDIO_FILL_LEVEL_TO_POLL)
 992                         qdio_mark_q(q);
 993
 994         } else if (!q->hydra_gives_outbound_pcis)
 995                 if (!qdio_is_outbound_q_done(q))
 996                         qdio_mark_q(q);
 997
 998         qdio_release_q(q);
 999 }
1000
1001 static void
1002 qdio_outbound_processing(struct qdio_q *q)
1003 {
1004         __qdio_outbound_processing(q);
1005 }
1006
1007 /************************* INBOUND ROUTINES *******************************/
1008
1009
1010 static inline int
1011 qdio_get_inbound_buffer_frontier(struct qdio_q *q)
1012 {
1013         struct qdio_irq *irq;
1014         int f,f_mod_no;
1015         volatile char *slsb;
1016         unsigned int count = 1;
1017         int first_not_to_check;
1018 #ifdef CONFIG_QDIO_DEBUG
1019         char dbf_text[15];
1020 #endif /* CONFIG_QDIO_DEBUG */
1021 #ifdef QDIO_USE_PROCESSING_STATE
1022         int last_position=-1;
1023 #endif /* QDIO_USE_PROCESSING_STATE */
1024
1025         QDIO_DBF_TEXT4(0,trace,"getibfro");
1026         QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
1027
1028         irq = (struct qdio_irq *) q->irq_ptr;
1029         if (irq->is_qebsm)
1030                 return qdio_qebsm_get_inbound_buffer_frontier(q);
1031
1032         slsb=&q->slsb.acc.val[0];
1033         f_mod_no=f=q->first_to_check;
1034         /*
1035          * we don't check 128 buffers, as otherwise qdio_has_inbound_q_moved
1036          * would return 0
1037          */
1038         first_not_to_check=f+qdio_min(atomic_read(&q->number_of_buffers_used),
1039                                       (QDIO_MAX_BUFFERS_PER_Q-1));
1040
1041         /*
1042          * we don't use this one, as a PCI or we after a thin interrupt
1043          * will sync the queues
1044          */
1045         /* SYNC_MEMORY;*/
1046
1047 check_next:
1048         f_mod_no=f&(QDIO_MAX_BUFFERS_PER_Q-1);
1049         if (f==first_not_to_check)
1050                 goto out;
1051         switch (slsb[f_mod_no]) {
1052
1053         /* CU_EMPTY means frontier is reached */
1054         case SLSB_CU_INPUT_EMPTY:
1055                 QDIO_DBF_TEXT5(0,trace,"inptempt");
1056                 break;
1057
1058         /* P_PRIMED means set slsb to P_PROCESSING and move on */
1059         case SLSB_P_INPUT_PRIMED:
1060                 QDIO_DBF_TEXT5(0,trace,"inptprim");
1061
1062 #ifdef QDIO_USE_PROCESSING_STATE
1063                 /*
1064                  * as soon as running under VM, polling the input queues will
1065                  * kill VM in terms of CP overhead
1066                  */
1067                 if (q->siga_sync) {
1068                         set_slsb(q, &f_mod_no, SLSB_P_INPUT_NOT_INIT, &count);
1069                 } else {
1070                         /* set the previous buffer to NOT_INIT. The current
1071                          * buffer will be set to PROCESSING at the end of
1072                          * this function to avoid further interrupts. */
1073                         if (last_position>=0)
1074                                 set_slsb(q, &last_position,
1075                                          SLSB_P_INPUT_NOT_INIT, &count);
1076                         atomic_set(&q->polling,1);
1077                         last_position=f_mod_no;
1078                 }
1079 #else /* QDIO_USE_PROCESSING_STATE */
1080                 set_slsb(q, &f_mod_no, SLSB_P_INPUT_NOT_INIT, &count);
1081 #endif /* QDIO_USE_PROCESSING_STATE */
1082                 /*
1083                  * not needed, as the inbound queue will be synced on the next
1084                  * siga-r, resp. tiqdio_is_inbound_q_done will do the siga-s
1085                  */
1086                 /*SYNC_MEMORY;*/
1087                 f++;
1088                 atomic_dec(&q->number_of_buffers_used);
1089                 goto check_next;
1090
1091         case SLSB_P_INPUT_NOT_INIT:
1092         case SLSB_P_INPUT_PROCESSING:
1093                 QDIO_DBF_TEXT5(0,trace,"inpnipro");
1094                 break;
1095
1096         /* P_ERROR means frontier is reached, break and report error */
1097         case SLSB_P_INPUT_ERROR:
1098 #ifdef CONFIG_QDIO_DEBUG
1099                 sprintf(dbf_text,"inperr%2x",f_mod_no);
1100                 QDIO_DBF_TEXT3(1,trace,dbf_text);
1101 #endif /* CONFIG_QDIO_DEBUG */
1102                 QDIO_DBF_HEX2(1,sbal,q->sbal[f_mod_no],256);
1103
1104                 /* kind of process the buffer */
1105                 set_slsb(q, &f_mod_no, SLSB_P_INPUT_NOT_INIT, &count);
1106
1107                 if (q->qdio_error)
1108                         q->error_status_flags|=
1109                                 QDIO_STATUS_MORE_THAN_ONE_QDIO_ERROR;
1110                 q->qdio_error=SLSB_P_INPUT_ERROR;
1111                 q->error_status_flags|=QDIO_STATUS_LOOK_FOR_ERROR;
1112
1113                 /* we increment the frontier, as this buffer
1114                  * was processed obviously */
1115                 f_mod_no=(f_mod_no+1)&(QDIO_MAX_BUFFERS_PER_Q-1);
1116                 atomic_dec(&q->number_of_buffers_used);
1117
1118 #ifdef QDIO_USE_PROCESSING_STATE
1119                 last_position=-1;
1120 #endif /* QDIO_USE_PROCESSING_STATE */
1121
1122                 break;
1123
1124         /* everything else means frontier not changed (HALTED or so) */
1125         default:
1126                 break;
1127         }
1128 out:
1129         q->first_to_check=f_mod_no;
1130
1131 #ifdef QDIO_USE_PROCESSING_STATE
1132         if (last_position>=0)
1133                 set_slsb(q, &last_position, SLSB_P_INPUT_NOT_INIT, &count);
1134 #endif /* QDIO_USE_PROCESSING_STATE */
1135
1136         QDIO_DBF_HEX4(0,trace,&q->first_to_check,sizeof(int));
1137
1138         return q->first_to_check;
1139 }
1140
1141 static inline int
1142 qdio_has_inbound_q_moved(struct qdio_q *q)
1143 {
1144         int i;
1145
1146 #ifdef QDIO_PERFORMANCE_STATS
1147         static int old_pcis=0;
1148         static int old_thinints=0;
1149
1150         if ((old_pcis==perf_stats.pcis)&&(old_thinints==perf_stats.thinints))
1151                 perf_stats.start_time_inbound=NOW;
1152         else
1153                 old_pcis=perf_stats.pcis;
1154 #endif /* QDIO_PERFORMANCE_STATS */
1155
1156         i=qdio_get_inbound_buffer_frontier(q);
1157         if ( (i!=GET_SAVED_FRONTIER(q)) ||
1158              (q->error_status_flags&QDIO_STATUS_LOOK_FOR_ERROR) ) {
1159                 SAVE_FRONTIER(q,i);
1160                 if ((!q->siga_sync)&&(!q->hydra_gives_outbound_pcis))
1161                         SAVE_TIMESTAMP(q);
1162
1163                 QDIO_DBF_TEXT4(0,trace,"inhasmvd");
1164                 QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
1165                 return 1;
1166         } else {
1167                 QDIO_DBF_TEXT4(0,trace,"inhsntmv");
1168                 QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
1169                 return 0;
1170         }
1171 }
1172
1173 /* means, no more buffers to be filled */
1174 static inline int
1175 tiqdio_is_inbound_q_done(struct qdio_q *q)
1176 {
1177         int no_used;
1178         unsigned int start_buf, count;
1179         unsigned char state = 0;
1180         struct qdio_irq *irq = (struct qdio_irq *) q->irq_ptr;
1181
1182 #ifdef CONFIG_QDIO_DEBUG
1183         char dbf_text[15];
1184 #endif
1185
1186         no_used=atomic_read(&q->number_of_buffers_used);
1187
1188         /* propagate the change from 82 to 80 through VM */
1189         SYNC_MEMORY;
1190
1191 #ifdef CONFIG_QDIO_DEBUG
1192         if (no_used) {
1193                 sprintf(dbf_text,"iqisnt%02x",no_used);
1194                 QDIO_DBF_TEXT4(0,trace,dbf_text);
1195         } else {
1196                 QDIO_DBF_TEXT4(0,trace,"iniqisdo");
1197         }
1198         QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
1199 #endif /* CONFIG_QDIO_DEBUG */
1200
1201         if (!no_used)
1202                 return 1;
1203         if (!q->siga_sync && !irq->is_qebsm)
1204                 /* we'll check for more primed buffers in qeth_stop_polling */
1205                 return 0;
1206         if (irq->is_qebsm) {
1207                 count = 1;
1208                 start_buf = q->first_to_check;
1209                 qdio_do_eqbs(q, &state, &start_buf, &count);
1210         } else
1211                 state = q->slsb.acc.val[q->first_to_check];
1212         if (state != SLSB_P_INPUT_PRIMED)
1213                 /*
1214                  * nothing more to do, if next buffer is not PRIMED.
1215                  * note that we did a SYNC_MEMORY before, that there
1216                  * has been a sychnronization.
1217                  * we will return 0 below, as there is nothing to do
1218                  * (stop_polling not necessary, as we have not been
1219                  * using the PROCESSING state
1220                  */
1221                 return 0;
1222
1223         /*
1224          * ok, the next input buffer is primed. that means, that device state
1225          * change indicator and adapter local summary are set, so we will find
1226          * it next time.
1227          * we will return 0 below, as there is nothing to do, except scheduling
1228          * ourselves for the next time.
1229          */
1230         tiqdio_set_summary_bit((__u32*)q->dev_st_chg_ind);
1231         tiqdio_sched_tl();
1232         return 0;
1233 }
1234
1235 static inline int
1236 qdio_is_inbound_q_done(struct qdio_q *q)
1237 {
1238         int no_used;
1239         unsigned int start_buf, count;
1240         unsigned char state = 0;
1241         struct qdio_irq *irq = (struct qdio_irq *) q->irq_ptr;
1242
1243 #ifdef CONFIG_QDIO_DEBUG
1244         char dbf_text[15];
1245 #endif
1246
1247         no_used=atomic_read(&q->number_of_buffers_used);
1248
1249         /*
1250          * we need that one for synchronization with the adapter, as it
1251          * does a kind of PCI avoidance
1252          */
1253         SYNC_MEMORY;
1254
1255         if (!no_used) {
1256                 QDIO_DBF_TEXT4(0,trace,"inqisdnA");
1257                 QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
1258                 QDIO_DBF_TEXT4(0,trace,dbf_text);
1259                 return 1;
1260         }
1261         if (irq->is_qebsm) {
1262                 count = 1;
1263                 start_buf = q->first_to_check;
1264                 qdio_do_eqbs(q, &state, &start_buf, &count);
1265         } else
1266                 state = q->slsb.acc.val[q->first_to_check];
1267         if (state == SLSB_P_INPUT_PRIMED) {
1268                 /* we got something to do */
1269                 QDIO_DBF_TEXT4(0,trace,"inqisntA");
1270                 QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
1271                 return 0;
1272         }
1273
1274         /* on VM, we don't poll, so the q is always done here */
1275         if (q->siga_sync)
1276                 return 1;
1277         if (q->hydra_gives_outbound_pcis)
1278                 return 1;
1279
1280         /*
1281          * at this point we know, that inbound first_to_check
1282          * has (probably) not moved (see qdio_inbound_processing)
1283          */
1284         if (NOW>GET_SAVED_TIMESTAMP(q)+q->timing.threshold) {
1285 #ifdef CONFIG_QDIO_DEBUG
1286                 QDIO_DBF_TEXT4(0,trace,"inqisdon");
1287                 QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
1288                 sprintf(dbf_text,"pf%02xcn%02x",q->first_to_check,no_used);
1289                 QDIO_DBF_TEXT4(0,trace,dbf_text);
1290 #endif /* CONFIG_QDIO_DEBUG */
1291                 return 1;
1292         } else {
1293 #ifdef CONFIG_QDIO_DEBUG
1294                 QDIO_DBF_TEXT4(0,trace,"inqisntd");
1295                 QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
1296                 sprintf(dbf_text,"pf%02xcn%02x",q->first_to_check,no_used);
1297                 QDIO_DBF_TEXT4(0,trace,dbf_text);
1298 #endif /* CONFIG_QDIO_DEBUG */
1299                 return 0;
1300         }
1301 }
1302
1303 static inline void
1304 qdio_kick_inbound_handler(struct qdio_q *q)
1305 {
1306         int count, start, end, real_end, i;
1307 #ifdef CONFIG_QDIO_DEBUG
1308         char dbf_text[15];
1309 #endif
1310
1311         QDIO_DBF_TEXT4(0,trace,"kickinh");
1312         QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
1313
1314         start=q->first_element_to_kick;
1315         real_end=q->first_to_check;
1316         end=(real_end+QDIO_MAX_BUFFERS_PER_Q-1)&(QDIO_MAX_BUFFERS_PER_Q-1);
1317
1318         i=start;
1319         count=0;
1320         while (1) {
1321                 count++;
1322                 if (i==end)
1323                         break;
1324                 i=(i+1)&(QDIO_MAX_BUFFERS_PER_Q-1);
1325         }
1326
1327 #ifdef CONFIG_QDIO_DEBUG
1328         sprintf(dbf_text,"s=%2xc=%2x",start,count);
1329         QDIO_DBF_TEXT4(0,trace,dbf_text);
1330 #endif /* CONFIG_QDIO_DEBUG */
1331
1332         if (likely(q->state==QDIO_IRQ_STATE_ACTIVE))
1333                 q->handler(q->cdev,
1334                            QDIO_STATUS_INBOUND_INT|q->error_status_flags,
1335                            q->qdio_error,q->siga_error,q->q_no,start,count,
1336                            q->int_parm);
1337
1338         /* for the next time: */
1339         q->first_element_to_kick=real_end;
1340         q->qdio_error=0;
1341         q->siga_error=0;
1342         q->error_status_flags=0;
1343
1344 #ifdef QDIO_PERFORMANCE_STATS
1345         perf_stats.inbound_time+=NOW-perf_stats.start_time_inbound;
1346         perf_stats.inbound_cnt++;
1347 #endif /* QDIO_PERFORMANCE_STATS */
1348 }
1349
1350 static inline void
1351 __tiqdio_inbound_processing(struct qdio_q *q, int spare_ind_was_set)
1352 {
1353         struct qdio_irq *irq_ptr;
1354         struct qdio_q *oq;
1355         int i;
1356
1357         QDIO_DBF_TEXT4(0,trace,"iqinproc");
1358         QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
1359
1360         /*
1361          * we first want to reserve the q, so that we know, that we don't
1362          * interrupt ourselves and call qdio_unmark_q, as is_in_shutdown might
1363          * be set
1364          */
1365         if (unlikely(qdio_reserve_q(q))) {
1366                 qdio_release_q(q);
1367 #ifdef QDIO_PERFORMANCE_STATS
1368                 ii_p_c++;
1369 #endif /* QDIO_PERFORMANCE_STATS */
1370                 /*
1371                  * as we might just be about to stop polling, we make
1372                  * sure that we check again at least once more
1373                  */
1374                 tiqdio_sched_tl();
1375                 return;
1376         }
1377 #ifdef QDIO_PERFORMANCE_STATS
1378         ii_p_nc++;
1379 #endif /* QDIO_PERFORMANCE_STATS */
1380         if (unlikely(atomic_read(&q->is_in_shutdown))) {
1381                 qdio_unmark_q(q);
1382                 goto out;
1383         }
1384
1385         /*
1386          * we reset spare_ind_was_set, when the queue does not use the
1387          * spare indicator
1388          */
1389         if (spare_ind_was_set)
1390                 spare_ind_was_set = (q->dev_st_chg_ind == &spare_indicator);
1391
1392         if (!(*(q->dev_st_chg_ind)) && !spare_ind_was_set)
1393                 goto out;
1394         /*
1395          * q->dev_st_chg_ind is the indicator, be it shared or not.
1396          * only clear it, if indicator is non-shared
1397          */
1398         if (!spare_ind_was_set)
1399                 tiqdio_clear_summary_bit((__u32*)q->dev_st_chg_ind);
1400
1401         if (q->hydra_gives_outbound_pcis) {
1402                 if (!q->siga_sync_done_on_thinints) {
1403                         SYNC_MEMORY_ALL;
1404                 } else if ((!q->siga_sync_done_on_outb_tis)&&
1405                          (q->hydra_gives_outbound_pcis)) {
1406                         SYNC_MEMORY_ALL_OUTB;
1407                 }
1408         } else {
1409                 SYNC_MEMORY;
1410         }
1411         /*
1412          * maybe we have to do work on our outbound queues... at least
1413          * we have to check the outbound-int-capable thinint-capable
1414          * queues
1415          */
1416         if (q->hydra_gives_outbound_pcis) {
1417                 irq_ptr = (struct qdio_irq*)q->irq_ptr;
1418                 for (i=0;i<irq_ptr->no_output_qs;i++) {
1419                         oq = irq_ptr->output_qs[i];
1420 #ifdef QDIO_PERFORMANCE_STATS
1421                         perf_stats.tl_runs--;
1422 #endif /* QDIO_PERFORMANCE_STATS */
1423                         if (!qdio_is_outbound_q_done(oq))
1424                                 __qdio_outbound_processing(oq);
1425                 }
1426         }
1427
1428         if (!qdio_has_inbound_q_moved(q))
1429                 goto out;
1430
1431         qdio_kick_inbound_handler(q);
1432         if (tiqdio_is_inbound_q_done(q))
1433                 if (!qdio_stop_polling(q)) {
1434                         /*
1435                          * we set the flags to get into the stuff next time,
1436                          * see also comment in qdio_stop_polling
1437                          */
1438                         tiqdio_set_summary_bit((__u32*)q->dev_st_chg_ind);
1439                         tiqdio_sched_tl();
1440                 }
1441 out:
1442         qdio_release_q(q);
1443 }
1444
1445 static void
1446 tiqdio_inbound_processing(struct qdio_q *q)
1447 {
1448         __tiqdio_inbound_processing(q, atomic_read(&spare_indicator_usecount));
1449 }
1450
1451 static inline void
1452 __qdio_inbound_processing(struct qdio_q *q)
1453 {
1454         int q_laps=0;
1455
1456         QDIO_DBF_TEXT4(0,trace,"qinproc");
1457         QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
1458
1459         if (unlikely(qdio_reserve_q(q))) {
1460                 qdio_release_q(q);
1461 #ifdef QDIO_PERFORMANCE_STATS
1462                 i_p_c++;
1463 #endif /* QDIO_PERFORMANCE_STATS */
1464                 /* as we're sissies, we'll check next time */
1465                 if (likely(!atomic_read(&q->is_in_shutdown))) {
1466                         qdio_mark_q(q);
1467                         QDIO_DBF_TEXT4(0,trace,"busy,agn");
1468                 }
1469                 return;
1470         }
1471 #ifdef QDIO_PERFORMANCE_STATS
1472         i_p_nc++;
1473         perf_stats.tl_runs++;
1474 #endif /* QDIO_PERFORMANCE_STATS */
1475
1476 again:
1477         if (qdio_has_inbound_q_moved(q)) {
1478                 qdio_kick_inbound_handler(q);
1479                 if (!qdio_stop_polling(q)) {
1480                         q_laps++;
1481                         if (q_laps<QDIO_Q_LAPS)
1482                                 goto again;
1483                 }
1484                 qdio_mark_q(q);
1485         } else {
1486                 if (!qdio_is_inbound_q_done(q))
1487                         /* means poll time is not yet over */
1488                         qdio_mark_q(q);
1489         }
1490
1491         qdio_release_q(q);
1492 }
1493
1494 static void
1495 qdio_inbound_processing(struct qdio_q *q)
1496 {
1497         __qdio_inbound_processing(q);
1498 }
1499
1500 /************************* MAIN ROUTINES *******************************/
1501
1502 #ifdef QDIO_USE_PROCESSING_STATE
1503 static inline int
1504 tiqdio_reset_processing_state(struct qdio_q *q, int q_laps)
1505 {
1506         if (!q) {
1507                 tiqdio_sched_tl();
1508                 return 0;
1509         }
1510
1511         /*
1512          * under VM, we have not used the PROCESSING state, so no
1513          * need to stop polling
1514          */
1515         if (q->siga_sync)
1516                 return 2;
1517
1518         if (unlikely(qdio_reserve_q(q))) {
1519                 qdio_release_q(q);
1520 #ifdef QDIO_PERFORMANCE_STATS
1521                 ii_p_c++;
1522 #endif /* QDIO_PERFORMANCE_STATS */
1523                 /*
1524                  * as we might just be about to stop polling, we make
1525                  * sure that we check again at least once more
1526                  */
1527
1528                 /*
1529                  * sanity -- we'd get here without setting the
1530                  * dev st chg ind
1531                  */
1532                 tiqdio_set_summary_bit((__u32*)q->dev_st_chg_ind);
1533                 tiqdio_sched_tl();
1534                 return 0;
1535         }
1536         if (qdio_stop_polling(q)) {
1537                 qdio_release_q(q);
1538                 return 2;
1539         }
1540         if (q_laps<QDIO_Q_LAPS-1) {
1541                 qdio_release_q(q);
1542                 return 3;
1543         }
1544         /*
1545          * we set the flags to get into the stuff
1546          * next time, see also comment in qdio_stop_polling
1547          */
1548         tiqdio_set_summary_bit((__u32*)q->dev_st_chg_ind);
1549         tiqdio_sched_tl();
1550         qdio_release_q(q);
1551         return 1;
1552
1553 }
1554 #endif /* QDIO_USE_PROCESSING_STATE */
1555
1556 static inline void
1557 tiqdio_inbound_checks(void)
1558 {
1559         struct qdio_q *q;
1560         int spare_ind_was_set=0;
1561 #ifdef QDIO_USE_PROCESSING_STATE
1562         int q_laps=0;
1563 #endif /* QDIO_USE_PROCESSING_STATE */
1564
1565         QDIO_DBF_TEXT4(0,trace,"iqdinbck");
1566         QDIO_DBF_TEXT5(0,trace,"iqlocsum");
1567
1568 #ifdef QDIO_USE_PROCESSING_STATE
1569 again:
1570 #endif /* QDIO_USE_PROCESSING_STATE */
1571
1572         /* when the spare indicator is used and set, save that and clear it */
1573         if ((atomic_read(&spare_indicator_usecount)) && spare_indicator) {
1574                 spare_ind_was_set = 1;
1575                 tiqdio_clear_summary_bit((__u32*)&spare_indicator);
1576         }
1577
1578         q=(struct qdio_q*)tiq_list;
1579         do {
1580                 if (!q)
1581                         break;
1582                 __tiqdio_inbound_processing(q, spare_ind_was_set);
1583                 q=(struct qdio_q*)q->list_next;
1584         } while (q!=(struct qdio_q*)tiq_list);
1585
1586 #ifdef QDIO_USE_PROCESSING_STATE
1587         q=(struct qdio_q*)tiq_list;
1588         do {
1589                 int ret;
1590
1591                 ret = tiqdio_reset_processing_state(q, q_laps);
1592                 switch (ret) {
1593                 case 0:
1594                         return;
1595                 case 1:
1596                         q_laps++;
1597                 case 2:
1598                         q = (struct qdio_q*)q->list_next;
1599                         break;
1600                 default:
1601                         q_laps++;
1602                         goto again;
1603                 }
1604         } while (q!=(struct qdio_q*)tiq_list);
1605 #endif /* QDIO_USE_PROCESSING_STATE */
1606 }
1607
1608 static void
1609 tiqdio_tl(unsigned long data)
1610 {
1611         QDIO_DBF_TEXT4(0,trace,"iqdio_tl");
1612
1613 #ifdef QDIO_PERFORMANCE_STATS
1614         perf_stats.tl_runs++;
1615 #endif /* QDIO_PERFORMANCE_STATS */
1616
1617         tiqdio_inbound_checks();
1618 }
1619
1620 /********************* GENERAL HELPER_ROUTINES ***********************/
1621
1622 static void
1623 qdio_release_irq_memory(struct qdio_irq *irq_ptr)
1624 {
1625         int i;
1626
1627         for (i=0;i<QDIO_MAX_QUEUES_PER_IRQ;i++) {
1628                 if (!irq_ptr->input_qs[i])
1629                         goto next;
1630
1631                 kfree(irq_ptr->input_qs[i]->slib);
1632                 kfree(irq_ptr->input_qs[i]);
1633
1634 next:
1635                 if (!irq_ptr->output_qs[i])
1636                         continue;
1637
1638                 kfree(irq_ptr->output_qs[i]->slib);
1639                 kfree(irq_ptr->output_qs[i]);
1640
1641         }
1642         kfree(irq_ptr->qdr);
1643         free_page((unsigned long) irq_ptr);
1644 }
1645
1646 static void
1647 qdio_set_impl_params(struct qdio_irq *irq_ptr,
1648                      unsigned int qib_param_field_format,
1649                      /* pointer to 128 bytes or NULL, if no param field */
1650                      unsigned char *qib_param_field,
1651                      /* pointer to no_queues*128 words of data or NULL */
1652                      unsigned int no_input_qs,
1653                      unsigned int no_output_qs,
1654                      unsigned long *input_slib_elements,
1655                      unsigned long *output_slib_elements)
1656 {
1657         int i,j;
1658
1659         if (!irq_ptr)
1660                 return;
1661
1662         irq_ptr->qib.pfmt=qib_param_field_format;
1663         if (qib_param_field)
1664                 memcpy(irq_ptr->qib.parm,qib_param_field,
1665                        QDIO_MAX_BUFFERS_PER_Q);
1666
1667         if (input_slib_elements)
1668                 for (i=0;i<no_input_qs;i++) {
1669                         for (j=0;j<QDIO_MAX_BUFFERS_PER_Q;j++)
1670                                 irq_ptr->input_qs[i]->slib->slibe[j].parms=
1671                                         input_slib_elements[
1672                                                 i*QDIO_MAX_BUFFERS_PER_Q+j];
1673                 }
1674         if (output_slib_elements)
1675                 for (i=0;i<no_output_qs;i++) {
1676                         for (j=0;j<QDIO_MAX_BUFFERS_PER_Q;j++)
1677                                 irq_ptr->output_qs[i]->slib->slibe[j].parms=
1678                                         output_slib_elements[
1679                                                 i*QDIO_MAX_BUFFERS_PER_Q+j];
1680                 }
1681 }
1682
1683 static int
1684 qdio_alloc_qs(struct qdio_irq *irq_ptr,
1685               int no_input_qs, int no_output_qs)
1686 {
1687         int i;
1688         struct qdio_q *q;
1689         int result=-ENOMEM;
1690
1691         for (i=0;i<no_input_qs;i++) {
1692                 q = kzalloc(sizeof(struct qdio_q), GFP_KERNEL);
1693
1694                 if (!q) {
1695                         QDIO_PRINT_ERR("kmalloc of q failed!\n");
1696                         goto out;
1697                 }
1698
1699                 q->slib = kmalloc(PAGE_SIZE, GFP_KERNEL);
1700                 if (!q->slib) {
1701                         QDIO_PRINT_ERR("kmalloc of slib failed!\n");
1702                         goto out;
1703                 }
1704
1705                 irq_ptr->input_qs[i]=q;
1706         }
1707
1708         for (i=0;i<no_output_qs;i++) {
1709                 q = kzalloc(sizeof(struct qdio_q), GFP_KERNEL);
1710
1711                 if (!q) {
1712                         goto out;
1713                 }
1714
1715                 q->slib=kmalloc(PAGE_SIZE,GFP_KERNEL);
1716                 if (!q->slib) {
1717                         QDIO_PRINT_ERR("kmalloc of slib failed!\n");
1718                         goto out;
1719                 }
1720
1721                 irq_ptr->output_qs[i]=q;
1722         }
1723
1724         result=0;
1725 out:
1726         return result;
1727 }
1728
1729 static void
1730 qdio_fill_qs(struct qdio_irq *irq_ptr, struct ccw_device *cdev,
1731              int no_input_qs, int no_output_qs,
1732              qdio_handler_t *input_handler,
1733              qdio_handler_t *output_handler,
1734              unsigned long int_parm,int q_format,
1735              unsigned long flags,
1736              void **inbound_sbals_array,
1737              void **outbound_sbals_array)
1738 {
1739         struct qdio_q *q;
1740         int i,j;
1741         char dbf_text[20]; /* see qdio_initialize */
1742         void *ptr;
1743         int available;
1744
1745         sprintf(dbf_text,"qfqs%4x",cdev->private->sch_no);
1746         QDIO_DBF_TEXT0(0,setup,dbf_text);
1747         for (i=0;i<no_input_qs;i++) {
1748                 q=irq_ptr->input_qs[i];
1749
1750                 memset(q,0,((char*)&q->slib)-((char*)q));
1751                 sprintf(dbf_text,"in-q%4x",i);
1752                 QDIO_DBF_TEXT0(0,setup,dbf_text);
1753                 QDIO_DBF_HEX0(0,setup,&q,sizeof(void*));
1754
1755                 memset(q->slib,0,PAGE_SIZE);
1756                 q->sl=(struct sl*)(((char*)q->slib)+PAGE_SIZE/2);
1757
1758                 available=0;
1759
1760                 for (j=0;j<QDIO_MAX_BUFFERS_PER_Q;j++)
1761                         q->sbal[j]=*(inbound_sbals_array++);
1762
1763                 q->queue_type=q_format;
1764                 q->int_parm=int_parm;
1765                 q->schid = irq_ptr->schid;
1766                 q->irq_ptr = irq_ptr;
1767                 q->cdev = cdev;
1768                 q->mask=1<<(31-i);
1769                 q->q_no=i;
1770                 q->is_input_q=1;
1771                 q->first_to_check=0;
1772                 q->last_move_ftc=0;
1773                 q->handler=input_handler;
1774                 q->dev_st_chg_ind=irq_ptr->dev_st_chg_ind;
1775
1776                 q->tasklet.data=(unsigned long)q;
1777                 /* q->is_thinint_q isn't valid at this time, but
1778                  * irq_ptr->is_thinint_irq is */
1779                 q->tasklet.func=(void(*)(unsigned long))
1780                         ((irq_ptr->is_thinint_irq)?&tiqdio_inbound_processing:
1781                          &qdio_inbound_processing);
1782
1783                 /* actually this is not used for inbound queues. yet. */
1784                 atomic_set(&q->busy_siga_counter,0);
1785                 q->timing.busy_start=0;
1786
1787 /*              for (j=0;j<QDIO_STATS_NUMBER;j++)
1788                         q->timing.last_transfer_times[j]=(qdio_get_micros()/
1789                                                           QDIO_STATS_NUMBER)*j;
1790                 q->timing.last_transfer_index=QDIO_STATS_NUMBER-1;
1791 */
1792
1793                 /* fill in slib */
1794                 if (i>0) irq_ptr->input_qs[i-1]->slib->nsliba=
1795                                  (unsigned long)(q->slib);
1796                 q->slib->sla=(unsigned long)(q->sl);
1797                 q->slib->slsba=(unsigned long)(&q->slsb.acc.val[0]);
1798
1799                 /* fill in sl */
1800                 for (j=0;j<QDIO_MAX_BUFFERS_PER_Q;j++)
1801                         q->sl->element[j].sbal=(unsigned long)(q->sbal[j]);
1802
1803                 QDIO_DBF_TEXT2(0,setup,"sl-sb-b0");
1804                 ptr=(void*)q->sl;
1805                 QDIO_DBF_HEX2(0,setup,&ptr,sizeof(void*));
1806                 ptr=(void*)&q->slsb;
1807                 QDIO_DBF_HEX2(0,setup,&ptr,sizeof(void*));
1808                 ptr=(void*)q->sbal[0];
1809                 QDIO_DBF_HEX2(0,setup,&ptr,sizeof(void*));
1810
1811                 /* fill in slsb */
1812                 if (!irq_ptr->is_qebsm) {
1813                         unsigned int count = 1;
1814                         for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; j++)
1815                                 set_slsb(q, &j, SLSB_P_INPUT_NOT_INIT, &count);
1816                 }
1817         }
1818
1819         for (i=0;i<no_output_qs;i++) {
1820                 q=irq_ptr->output_qs[i];
1821                 memset(q,0,((char*)&q->slib)-((char*)q));
1822
1823                 sprintf(dbf_text,"outq%4x",i);
1824                 QDIO_DBF_TEXT0(0,setup,dbf_text);
1825                 QDIO_DBF_HEX0(0,setup,&q,sizeof(void*));
1826
1827                 memset(q->slib,0,PAGE_SIZE);
1828                 q->sl=(struct sl*)(((char*)q->slib)+PAGE_SIZE/2);
1829
1830                 available=0;
1831
1832                 for (j=0;j<QDIO_MAX_BUFFERS_PER_Q;j++)
1833                         q->sbal[j]=*(outbound_sbals_array++);
1834
1835                 q->queue_type=q_format;
1836                 q->int_parm=int_parm;
1837                 q->is_input_q=0;
1838                 q->schid = irq_ptr->schid;
1839                 q->cdev = cdev;
1840                 q->irq_ptr = irq_ptr;
1841                 q->mask=1<<(31-i);
1842                 q->q_no=i;
1843                 q->first_to_check=0;
1844                 q->last_move_ftc=0;
1845                 q->handler=output_handler;
1846
1847                 q->tasklet.data=(unsigned long)q;
1848                 q->tasklet.func=(void(*)(unsigned long))
1849                         &qdio_outbound_processing;
1850
1851                 atomic_set(&q->busy_siga_counter,0);
1852                 q->timing.busy_start=0;
1853
1854                 /* fill in slib */
1855                 if (i>0) irq_ptr->output_qs[i-1]->slib->nsliba=
1856                                  (unsigned long)(q->slib);
1857                 q->slib->sla=(unsigned long)(q->sl);
1858                 q->slib->slsba=(unsigned long)(&q->slsb.acc.val[0]);
1859
1860                 /* fill in sl */
1861                 for (j=0;j<QDIO_MAX_BUFFERS_PER_Q;j++)
1862                         q->sl->element[j].sbal=(unsigned long)(q->sbal[j]);
1863
1864                 QDIO_DBF_TEXT2(0,setup,"sl-sb-b0");
1865                 ptr=(void*)q->sl;
1866                 QDIO_DBF_HEX2(0,setup,&ptr,sizeof(void*));
1867                 ptr=(void*)&q->slsb;
1868                 QDIO_DBF_HEX2(0,setup,&ptr,sizeof(void*));
1869                 ptr=(void*)q->sbal[0];
1870                 QDIO_DBF_HEX2(0,setup,&ptr,sizeof(void*));
1871
1872                 /* fill in slsb */
1873                 if (!irq_ptr->is_qebsm) {
1874                         unsigned int count = 1;
1875                         for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; j++)
1876                                 set_slsb(q, &j, SLSB_P_OUTPUT_NOT_INIT, &count);
1877                 }
1878         }
1879 }
1880
1881 static void
1882 qdio_fill_thresholds(struct qdio_irq *irq_ptr,
1883                      unsigned int no_input_qs,
1884                      unsigned int no_output_qs,
1885                      unsigned int min_input_threshold,
1886                      unsigned int max_input_threshold,
1887                      unsigned int min_output_threshold,
1888                      unsigned int max_output_threshold)
1889 {
1890         int i;
1891         struct qdio_q *q;
1892
1893         for (i=0;i<no_input_qs;i++) {
1894                 q=irq_ptr->input_qs[i];
1895                 q->timing.threshold=max_input_threshold;
1896 /*              for (j=0;j<QDIO_STATS_CLASSES;j++) {
1897                         q->threshold_classes[j].threshold=
1898                                 min_input_threshold+
1899                                 (max_input_threshold-min_input_threshold)/
1900                                 QDIO_STATS_CLASSES;
1901                 }
1902                 qdio_use_thresholds(q,QDIO_STATS_CLASSES/2);*/
1903         }
1904         for (i=0;i<no_output_qs;i++) {
1905                 q=irq_ptr->output_qs[i];
1906                 q->timing.threshold=max_output_threshold;
1907 /*              for (j=0;j<QDIO_STATS_CLASSES;j++) {
1908                         q->threshold_classes[j].threshold=
1909                                 min_output_threshold+
1910                                 (max_output_threshold-min_output_threshold)/
1911                                 QDIO_STATS_CLASSES;
1912                 }
1913                 qdio_use_thresholds(q,QDIO_STATS_CLASSES/2);*/
1914         }
1915 }
1916
1917 static int
1918 tiqdio_thinint_handler(void)
1919 {
1920         QDIO_DBF_TEXT4(0,trace,"thin_int");
1921
1922 #ifdef QDIO_PERFORMANCE_STATS
1923         perf_stats.thinints++;
1924         perf_stats.start_time_inbound=NOW;
1925 #endif /* QDIO_PERFORMANCE_STATS */
1926
1927         /* SVS only when needed:
1928          * issue SVS to benefit from iqdio interrupt avoidance
1929          * (SVS clears AISOI)*/
1930         if (!omit_svs)
1931                 tiqdio_clear_global_summary();
1932
1933         tiqdio_inbound_checks();
1934         return 0;
1935 }
1936
1937 static void
1938 qdio_set_state(struct qdio_irq *irq_ptr, enum qdio_irq_states state)
1939 {
1940         int i;
1941 #ifdef CONFIG_QDIO_DEBUG
1942         char dbf_text[15];
1943
1944         QDIO_DBF_TEXT5(0,trace,"newstate");
1945         sprintf(dbf_text,"%4x%4x",irq_ptr->schid.sch_no,state);
1946         QDIO_DBF_TEXT5(0,trace,dbf_text);
1947 #endif /* CONFIG_QDIO_DEBUG */
1948
1949         irq_ptr->state=state;
1950         for (i=0;i<irq_ptr->no_input_qs;i++)
1951                 irq_ptr->input_qs[i]->state=state;
1952         for (i=0;i<irq_ptr->no_output_qs;i++)
1953                 irq_ptr->output_qs[i]->state=state;
1954         mb();
1955 }
1956
1957 static inline void
1958 qdio_irq_check_sense(struct subchannel_id schid, struct irb *irb)
1959 {
1960         char dbf_text[15];
1961
1962         if (irb->esw.esw0.erw.cons) {
1963                 sprintf(dbf_text,"sens%4x",schid.sch_no);
1964                 QDIO_DBF_TEXT2(1,trace,dbf_text);
1965                 QDIO_DBF_HEX0(0,sense,irb,QDIO_DBF_SENSE_LEN);
1966
1967                 QDIO_PRINT_WARN("sense data available on qdio channel.\n");
1968                 HEXDUMP16(WARN,"irb: ",irb);
1969                 HEXDUMP16(WARN,"sense data: ",irb->ecw);
1970         }
1971
1972 }
1973
1974 static inline void
1975 qdio_handle_pci(struct qdio_irq *irq_ptr)
1976 {
1977         int i;
1978         struct qdio_q *q;
1979
1980 #ifdef QDIO_PERFORMANCE_STATS
1981         perf_stats.pcis++;
1982         perf_stats.start_time_inbound=NOW;
1983 #endif /* QDIO_PERFORMANCE_STATS */
1984         for (i=0;i<irq_ptr->no_input_qs;i++) {
1985                 q=irq_ptr->input_qs[i];
1986                 if (q->is_input_q&QDIO_FLAG_NO_INPUT_INTERRUPT_CONTEXT)
1987                         qdio_mark_q(q);
1988                 else {
1989 #ifdef QDIO_PERFORMANCE_STATS
1990                         perf_stats.tl_runs--;
1991 #endif /* QDIO_PERFORMANCE_STATS */
1992                         __qdio_inbound_processing(q);
1993                 }
1994         }
1995         if (!irq_ptr->hydra_gives_outbound_pcis)
1996                 return;
1997         for (i=0;i<irq_ptr->no_output_qs;i++) {
1998                 q=irq_ptr->output_qs[i];
1999 #ifdef QDIO_PERFORMANCE_STATS
2000                 perf_stats.tl_runs--;
2001 #endif /* QDIO_PERFORMANCE_STATS */
2002                 if (qdio_is_outbound_q_done(q))
2003                         continue;
2004                 if (!irq_ptr->sync_done_on_outb_pcis)
2005                         SYNC_MEMORY;
2006                 __qdio_outbound_processing(q);
2007         }
2008 }
2009
2010 static void qdio_establish_handle_irq(struct ccw_device*, int, int);
2011
2012 static inline void
2013 qdio_handle_activate_check(struct ccw_device *cdev, unsigned long intparm,
2014                            int cstat, int dstat)
2015 {
2016         struct qdio_irq *irq_ptr;
2017         struct qdio_q *q;
2018         char dbf_text[15];
2019
2020         irq_ptr = cdev->private->qdio_data;
2021
2022         QDIO_DBF_TEXT2(1, trace, "ick2");
2023         sprintf(dbf_text,"%s", cdev->dev.bus_id);
2024         QDIO_DBF_TEXT2(1,trace,dbf_text);
2025         QDIO_DBF_HEX2(0,trace,&intparm,sizeof(int));
2026         QDIO_DBF_HEX2(0,trace,&dstat,sizeof(int));
2027         QDIO_DBF_HEX2(0,trace,&cstat,sizeof(int));
2028         QDIO_PRINT_ERR("received check condition on activate " \
2029                        "queues on device %s (cs=x%x, ds=x%x).\n",
2030                        cdev->dev.bus_id, cstat, dstat);
2031         if (irq_ptr->no_input_qs) {
2032                 q=irq_ptr->input_qs[0];
2033         } else if (irq_ptr->no_output_qs) {
2034                 q=irq_ptr->output_qs[0];
2035         } else {
2036                 QDIO_PRINT_ERR("oops... no queue registered for device %s!?\n",
2037                                cdev->dev.bus_id);
2038                 goto omit_handler_call;
2039         }
2040         q->handler(q->cdev,QDIO_STATUS_ACTIVATE_CHECK_CONDITION|
2041                    QDIO_STATUS_LOOK_FOR_ERROR,
2042                    0,0,0,-1,-1,q->int_parm);
2043 omit_handler_call:
2044         qdio_set_state(irq_ptr,QDIO_IRQ_STATE_STOPPED);
2045
2046 }
2047
2048 static void
2049 qdio_call_shutdown(void *data)
2050 {
2051         struct ccw_device *cdev;
2052
2053         cdev = (struct ccw_device *)data;
2054         qdio_shutdown(cdev, QDIO_FLAG_CLEANUP_USING_CLEAR);
2055         put_device(&cdev->dev);
2056 }
2057
2058 static void
2059 qdio_timeout_handler(struct ccw_device *cdev)
2060 {
2061         struct qdio_irq *irq_ptr;
2062         char dbf_text[15];
2063
2064         QDIO_DBF_TEXT2(0, trace, "qtoh");
2065         sprintf(dbf_text, "%s", cdev->dev.bus_id);
2066         QDIO_DBF_TEXT2(0, trace, dbf_text);
2067
2068         irq_ptr = cdev->private->qdio_data;
2069         sprintf(dbf_text, "state:%d", irq_ptr->state);
2070         QDIO_DBF_TEXT2(0, trace, dbf_text);
2071
2072         switch (irq_ptr->state) {
2073         case QDIO_IRQ_STATE_INACTIVE:
2074                 QDIO_PRINT_ERR("establish queues on irq 0.%x.%04x: timed out\n",
2075                                irq_ptr->schid.ssid, irq_ptr->schid.sch_no);
2076                 QDIO_DBF_TEXT2(1,setup,"eq:timeo");
2077                 qdio_set_state(irq_ptr, QDIO_IRQ_STATE_ERR);
2078                 break;
2079         case QDIO_IRQ_STATE_CLEANUP:
2080                 QDIO_PRINT_INFO("Did not get interrupt on cleanup, "
2081                                 "irq=0.%x.%x.\n",
2082                                 irq_ptr->schid.ssid, irq_ptr->schid.sch_no);
2083                 qdio_set_state(irq_ptr, QDIO_IRQ_STATE_ERR);
2084                 break;
2085         case QDIO_IRQ_STATE_ESTABLISHED:
2086         case QDIO_IRQ_STATE_ACTIVE:
2087                 /* I/O has been terminated by common I/O layer. */
2088                 QDIO_PRINT_INFO("Queues on irq 0.%x.%04x killed by cio.\n",
2089                                 irq_ptr->schid.ssid, irq_ptr->schid.sch_no);
2090                 QDIO_DBF_TEXT2(1, trace, "cio:term");
2091                 qdio_set_state(irq_ptr, QDIO_IRQ_STATE_STOPPED);
2092                 if (get_device(&cdev->dev)) {
2093                         /* Can't call shutdown from interrupt context. */
2094                         PREPARE_WORK(&cdev->private->kick_work,
2095                                      qdio_call_shutdown, (void *)cdev);
2096                         queue_work(ccw_device_work, &cdev->private->kick_work);
2097                 }
2098                 break;
2099         default:
2100                 BUG();
2101         }
2102         ccw_device_set_timeout(cdev, 0);
2103         wake_up(&cdev->private->wait_q);
2104 }
2105
2106 static void
2107 qdio_handler(struct ccw_device *cdev, unsigned long intparm, struct irb *irb)
2108 {
2109         struct qdio_irq *irq_ptr;
2110         int cstat,dstat;
2111         char dbf_text[15];
2112
2113 #ifdef CONFIG_QDIO_DEBUG
2114         QDIO_DBF_TEXT4(0, trace, "qint");
2115         sprintf(dbf_text, "%s", cdev->dev.bus_id);
2116         QDIO_DBF_TEXT4(0, trace, dbf_text);
2117 #endif /* CONFIG_QDIO_DEBUG */
2118
2119         if (!intparm) {
2120                 QDIO_PRINT_ERR("got unsolicited interrupt in qdio " \
2121                                   "handler, device %s\n", cdev->dev.bus_id);
2122                 return;
2123         }
2124
2125         irq_ptr = cdev->private->qdio_data;
2126         if (!irq_ptr) {
2127                 QDIO_DBF_TEXT2(1, trace, "uint");
2128                 sprintf(dbf_text,"%s", cdev->dev.bus_id);
2129                 QDIO_DBF_TEXT2(1,trace,dbf_text);
2130                 QDIO_PRINT_ERR("received interrupt on unused device %s!\n",
2131                                cdev->dev.bus_id);
2132                 return;
2133         }
2134
2135         if (IS_ERR(irb)) {
2136                 /* Currently running i/o is in error. */
2137                 switch (PTR_ERR(irb)) {
2138                 case -EIO:
2139                         QDIO_PRINT_ERR("i/o error on device %s\n",
2140                                        cdev->dev.bus_id);
2141                         return;
2142                 case -ETIMEDOUT:
2143                         qdio_timeout_handler(cdev);
2144                         return;
2145                 default:
2146                         QDIO_PRINT_ERR("unknown error state %ld on device %s\n",
2147                                        PTR_ERR(irb), cdev->dev.bus_id);
2148                         return;
2149                 }
2150         }
2151
2152         qdio_irq_check_sense(irq_ptr->schid, irb);
2153
2154 #ifdef CONFIG_QDIO_DEBUG
2155         sprintf(dbf_text, "state:%d", irq_ptr->state);
2156         QDIO_DBF_TEXT4(0, trace, dbf_text);
2157 #endif /* CONFIG_QDIO_DEBUG */
2158
2159         cstat = irb->scsw.cstat;
2160         dstat = irb->scsw.dstat;
2161
2162         switch (irq_ptr->state) {
2163         case QDIO_IRQ_STATE_INACTIVE:
2164                 qdio_establish_handle_irq(cdev, cstat, dstat);
2165                 break;
2166
2167         case QDIO_IRQ_STATE_CLEANUP:
2168                 qdio_set_state(irq_ptr, QDIO_IRQ_STATE_INACTIVE);
2169                 break;
2170
2171         case QDIO_IRQ_STATE_ESTABLISHED:
2172         case QDIO_IRQ_STATE_ACTIVE:
2173                 if (cstat & SCHN_STAT_PCI) {
2174                         qdio_handle_pci(irq_ptr);
2175                         break;
2176                 }
2177
2178                 if ((cstat&~SCHN_STAT_PCI)||dstat) {
2179                         qdio_handle_activate_check(cdev, intparm, cstat, dstat);
2180                         break;
2181                 }
2182         default:
2183                 QDIO_PRINT_ERR("got interrupt for queues in state %d on " \
2184                                "device %s?!\n",
2185                                irq_ptr->state, cdev->dev.bus_id);
2186         }
2187         wake_up(&cdev->private->wait_q);
2188
2189 }
2190
2191 int
2192 qdio_synchronize(struct ccw_device *cdev, unsigned int flags,
2193                  unsigned int queue_number)
2194 {
2195         int cc = 0;
2196         struct qdio_q *q;
2197         struct qdio_irq *irq_ptr;
2198         void *ptr;
2199 #ifdef CONFIG_QDIO_DEBUG
2200         char dbf_text[15]="SyncXXXX";
2201 #endif
2202
2203         irq_ptr = cdev->private->qdio_data;
2204         if (!irq_ptr)
2205                 return -ENODEV;
2206
2207 #ifdef CONFIG_QDIO_DEBUG
2208         *((int*)(&dbf_text[4])) = irq_ptr->schid.sch_no;
2209         QDIO_DBF_HEX4(0,trace,dbf_text,QDIO_DBF_TRACE_LEN);
2210         *((int*)(&dbf_text[0]))=flags;
2211         *((int*)(&dbf_text[4]))=queue_number;
2212         QDIO_DBF_HEX4(0,trace,dbf_text,QDIO_DBF_TRACE_LEN);
2213 #endif /* CONFIG_QDIO_DEBUG */
2214
2215         if (flags&QDIO_FLAG_SYNC_INPUT) {
2216                 q=irq_ptr->input_qs[queue_number];
2217                 if (!q)
2218                         return -EINVAL;
2219                 if (!(irq_ptr->is_qebsm))
2220                         cc = do_siga_sync(q->schid, 0, q->mask);
2221         } else if (flags&QDIO_FLAG_SYNC_OUTPUT) {
2222                 q=irq_ptr->output_qs[queue_number];
2223                 if (!q)
2224                         return -EINVAL;
2225                 if (!(irq_ptr->is_qebsm))
2226                         cc = do_siga_sync(q->schid, q->mask, 0);
2227         } else
2228                 return -EINVAL;
2229
2230         ptr=&cc;
2231         if (cc)
2232                 QDIO_DBF_HEX3(0,trace,&ptr,sizeof(int));
2233
2234         return cc;
2235 }
2236
2237 static inline void
2238 qdio_check_subchannel_qebsm(struct qdio_irq *irq_ptr, unsigned char qdioac,
2239                             unsigned long token)
2240 {
2241         struct qdio_q *q;
2242         int i;
2243         unsigned int count, start_buf;
2244         char dbf_text[15];
2245
2246         /*check if QEBSM is disabled */
2247         if (!(irq_ptr->is_qebsm) || !(qdioac & 0x01)) {
2248                 irq_ptr->is_qebsm  = 0;
2249                 irq_ptr->sch_token = 0;
2250                 irq_ptr->qib.rflags &= ~QIB_RFLAGS_ENABLE_QEBSM;
2251                 QDIO_DBF_TEXT0(0,setup,"noV=V");
2252                 return;
2253         }
2254         irq_ptr->sch_token = token;
2255         /*input queue*/
2256         for (i = 0; i < irq_ptr->no_input_qs;i++) {
2257                 q = irq_ptr->input_qs[i];
2258                 count = QDIO_MAX_BUFFERS_PER_Q;
2259                 start_buf = 0;
2260                 set_slsb(q, &start_buf, SLSB_P_INPUT_NOT_INIT, &count);
2261         }
2262         sprintf(dbf_text,"V=V:%2x",irq_ptr->is_qebsm);
2263         QDIO_DBF_TEXT0(0,setup,dbf_text);
2264         sprintf(dbf_text,"%8lx",irq_ptr->sch_token);
2265         QDIO_DBF_TEXT0(0,setup,dbf_text);
2266         /*output queue*/
2267         for (i = 0; i < irq_ptr->no_output_qs; i++) {
2268                 q = irq_ptr->output_qs[i];
2269                 count = QDIO_MAX_BUFFERS_PER_Q;
2270                 start_buf = 0;
2271                 set_slsb(q, &start_buf, SLSB_P_OUTPUT_NOT_INIT, &count);
2272         }
2273 }
2274
2275 static void
2276 qdio_get_ssqd_information(struct qdio_irq *irq_ptr)
2277 {
2278         int result;
2279         unsigned char qdioac;
2280         struct {
2281                 struct chsc_header request;
2282                 u16 reserved1:10;
2283                 u16 ssid:2;
2284                 u16 fmt:4;
2285                 u16 first_sch;
2286                 u16 reserved2;
2287                 u16 last_sch;
2288                 u32 reserved3;
2289                 struct chsc_header response;
2290                 u32 reserved4;
2291                 u8  flags;
2292                 u8  reserved5;
2293                 u16 sch;
2294                 u8  qfmt;
2295                 u8  parm;
2296                 u8  qdioac1;
2297                 u8  sch_class;
2298                 u8  reserved7;
2299                 u8  icnt;
2300                 u8  reserved8;
2301                 u8  ocnt;
2302                 u8 reserved9;
2303                 u8 mbccnt;
2304                 u16 qdioac2;
2305                 u64 sch_token;
2306         } *ssqd_area;
2307
2308         QDIO_DBF_TEXT0(0,setup,"getssqd");
2309         qdioac = 0;
2310         ssqd_area = mempool_alloc(qdio_mempool_scssc, GFP_ATOMIC);
2311         if (!ssqd_area) {
2312                 QDIO_PRINT_WARN("Could not get memory for chsc. Using all " \
2313                                 "SIGAs for sch x%x.\n", irq_ptr->schid.sch_no);
2314                 irq_ptr->qdioac = CHSC_FLAG_SIGA_INPUT_NECESSARY ||
2315                                   CHSC_FLAG_SIGA_OUTPUT_NECESSARY ||
2316                                   CHSC_FLAG_SIGA_SYNC_NECESSARY; /* all flags set */
2317                 irq_ptr->is_qebsm = 0;
2318                 irq_ptr->sch_token = 0;
2319                 irq_ptr->qib.rflags &= ~QIB_RFLAGS_ENABLE_QEBSM;
2320                 return;
2321         }
2322
2323         ssqd_area->request = (struct chsc_header) {
2324                 .length = 0x0010,
2325                 .code   = 0x0024,
2326         };
2327         ssqd_area->first_sch = irq_ptr->schid.sch_no;
2328         ssqd_area->last_sch = irq_ptr->schid.sch_no;
2329         ssqd_area->ssid = irq_ptr->schid.ssid;
2330         result = chsc(ssqd_area);
2331
2332         if (result) {
2333                 QDIO_PRINT_WARN("CHSC returned cc %i. Using all " \
2334                                 "SIGAs for sch 0.%x.%x.\n", result,
2335                                 irq_ptr->schid.ssid, irq_ptr->schid.sch_no);
2336                 qdioac = CHSC_FLAG_SIGA_INPUT_NECESSARY ||
2337                         CHSC_FLAG_SIGA_OUTPUT_NECESSARY ||
2338                         CHSC_FLAG_SIGA_SYNC_NECESSARY; /* all flags set */
2339                 irq_ptr->is_qebsm  = 0;
2340                 goto out;
2341         }
2342
2343         if (ssqd_area->response.code != QDIO_CHSC_RESPONSE_CODE_OK) {
2344                 QDIO_PRINT_WARN("response upon checking SIGA needs " \
2345                                 "is 0x%x. Using all SIGAs for sch 0.%x.%x.\n",
2346                                 ssqd_area->response.code,
2347                                 irq_ptr->schid.ssid, irq_ptr->schid.sch_no);
2348                 qdioac = CHSC_FLAG_SIGA_INPUT_NECESSARY ||
2349                         CHSC_FLAG_SIGA_OUTPUT_NECESSARY ||
2350                         CHSC_FLAG_SIGA_SYNC_NECESSARY; /* all flags set */
2351                 irq_ptr->is_qebsm  = 0;
2352                 goto out;
2353         }
2354         if (!(ssqd_area->flags & CHSC_FLAG_QDIO_CAPABILITY) ||
2355             !(ssqd_area->flags & CHSC_FLAG_VALIDITY) ||
2356             (ssqd_area->sch != irq_ptr->schid.sch_no)) {
2357                 QDIO_PRINT_WARN("huh? problems checking out sch 0.%x.%x... " \
2358                                 "using all SIGAs.\n",
2359                                 irq_ptr->schid.ssid, irq_ptr->schid.sch_no);
2360                 qdioac = CHSC_FLAG_SIGA_INPUT_NECESSARY |
2361                         CHSC_FLAG_SIGA_OUTPUT_NECESSARY |
2362                         CHSC_FLAG_SIGA_SYNC_NECESSARY; /* worst case */
2363                 irq_ptr->is_qebsm  = 0;
2364                 goto out;
2365         }
2366         qdioac = ssqd_area->qdioac1;
2367 out:
2368         qdio_check_subchannel_qebsm(irq_ptr, qdioac,
2369                                     ssqd_area->sch_token);
2370         mempool_free(ssqd_area, qdio_mempool_scssc);
2371         irq_ptr->qdioac = qdioac;
2372 }
2373
2374 static unsigned int
2375 tiqdio_check_chsc_availability(void)
2376 {
2377         char dbf_text[15];
2378
2379         if (!css_characteristics_avail)
2380                 return -EIO;
2381
2382         /* Check for bit 41. */
2383         if (!css_general_characteristics.aif) {
2384                 QDIO_PRINT_WARN("Adapter interruption facility not " \
2385                                 "installed.\n");
2386                 return -ENOENT;
2387         }
2388
2389         /* Check for bits 107 and 108. */
2390         if (!css_chsc_characteristics.scssc ||
2391             !css_chsc_characteristics.scsscf) {
2392                 QDIO_PRINT_WARN("Set Chan Subsys. Char. & Fast-CHSCs " \
2393                                 "not available.\n");
2394                 return -ENOENT;
2395         }
2396
2397         /* Check for OSA/FCP thin interrupts (bit 67). */
2398         hydra_thinints = css_general_characteristics.aif_osa;
2399         sprintf(dbf_text,"hydrati%1x", hydra_thinints);
2400         QDIO_DBF_TEXT0(0,setup,dbf_text);
2401
2402 #ifdef CONFIG_64BIT
2403         /* Check for QEBSM support in general (bit 58). */
2404         is_passthrough = css_general_characteristics.qebsm;
2405 #endif
2406         sprintf(dbf_text,"cssQBS:%1x", is_passthrough);
2407         QDIO_DBF_TEXT0(0,setup,dbf_text);
2408
2409         /* Check for aif time delay disablement fac (bit 56). If installed,
2410          * omit svs even under lpar (good point by rick again) */
2411         omit_svs = css_general_characteristics.aif_tdd;
2412         sprintf(dbf_text,"omitsvs%1x", omit_svs);
2413         QDIO_DBF_TEXT0(0,setup,dbf_text);
2414         return 0;
2415 }
2416
2417
2418 static unsigned int
2419 tiqdio_set_subchannel_ind(struct qdio_irq *irq_ptr, int reset_to_zero)
2420 {
2421         unsigned long real_addr_local_summary_bit;
2422         unsigned long real_addr_dev_st_chg_ind;
2423         void *ptr;
2424         char dbf_text[15];
2425
2426         unsigned int resp_code;
2427         int result;
2428
2429         struct {
2430                 struct chsc_header request;
2431                 u16 operation_code;
2432                 u16 reserved1;
2433                 u32 reserved2;
2434                 u32 reserved3;
2435                 u64 summary_indicator_addr;
2436                 u64 subchannel_indicator_addr;
2437                 u32 ks:4;
2438                 u32 kc:4;
2439                 u32 reserved4:21;
2440                 u32 isc:3;
2441                 u32 word_with_d_bit;
2442                 /* set to 0x10000000 to enable
2443                  * time delay disablement facility */
2444                 u32 reserved5;
2445                 struct subchannel_id schid;
2446                 u32 reserved6[1004];
2447                 struct chsc_header response;
2448                 u32 reserved7;
2449         } *scssc_area;
2450
2451         if (!irq_ptr->is_thinint_irq)
2452                 return -ENODEV;
2453
2454         if (reset_to_zero) {
2455                 real_addr_local_summary_bit=0;
2456                 real_addr_dev_st_chg_ind=0;
2457         } else {
2458                 real_addr_local_summary_bit=
2459                         virt_to_phys((volatile void *)indicators);
2460                 real_addr_dev_st_chg_ind=
2461                         virt_to_phys((volatile void *)irq_ptr->dev_st_chg_ind);
2462         }
2463
2464         scssc_area = mempool_alloc(qdio_mempool_scssc, GFP_ATOMIC);
2465         if (!scssc_area) {
2466                 QDIO_PRINT_WARN("No memory for setting indicators on " \
2467                                 "subchannel 0.%x.%x.\n",
2468                                 irq_ptr->schid.ssid, irq_ptr->schid.sch_no);
2469                 return -ENOMEM;
2470         }
2471         scssc_area->request = (struct chsc_header) {
2472                 .length = 0x0fe0,
2473                 .code   = 0x0021,
2474         };
2475         scssc_area->operation_code = 0;
2476
2477         scssc_area->summary_indicator_addr = real_addr_local_summary_bit;
2478         scssc_area->subchannel_indicator_addr = real_addr_dev_st_chg_ind;
2479         scssc_area->ks = QDIO_STORAGE_KEY;
2480         scssc_area->kc = QDIO_STORAGE_KEY;
2481         scssc_area->isc = TIQDIO_THININT_ISC;
2482         scssc_area->schid = irq_ptr->schid;
2483         /* enables the time delay disablement facility. Don't care
2484          * whether it is really there (i.e. we haven't checked for
2485          * it) */
2486         if (css_general_characteristics.aif_tdd)
2487                 scssc_area->word_with_d_bit = 0x10000000;
2488         else
2489                 QDIO_PRINT_WARN("Time delay disablement facility " \
2490                                 "not available\n");
2491
2492         result = chsc(scssc_area);
2493         if (result) {
2494                 QDIO_PRINT_WARN("could not set indicators on irq 0.%x.%x, " \
2495                                 "cc=%i.\n",
2496                                 irq_ptr->schid.ssid, irq_ptr->schid.sch_no,result);
2497                 result = -EIO;
2498                 goto out;
2499         }
2500
2501         resp_code = scssc_area->response.code;
2502         if (resp_code!=QDIO_CHSC_RESPONSE_CODE_OK) {
2503                 QDIO_PRINT_WARN("response upon setting indicators " \
2504                                 "is 0x%x.\n",resp_code);
2505                 sprintf(dbf_text,"sidR%4x",resp_code);
2506                 QDIO_DBF_TEXT1(0,trace,dbf_text);
2507                 QDIO_DBF_TEXT1(0,setup,dbf_text);
2508                 ptr=&scssc_area->response;
2509                 QDIO_DBF_HEX2(1,setup,&ptr,QDIO_DBF_SETUP_LEN);
2510                 result = -EIO;
2511                 goto out;
2512         }
2513
2514         QDIO_DBF_TEXT2(0,setup,"setscind");
2515         QDIO_DBF_HEX2(0,setup,&real_addr_local_summary_bit,
2516                       sizeof(unsigned long));
2517         QDIO_DBF_HEX2(0,setup,&real_addr_dev_st_chg_ind,sizeof(unsigned long));
2518         result = 0;
2519 out:
2520         mempool_free(scssc_area, qdio_mempool_scssc);
2521         return result;
2522
2523 }
2524
2525 static unsigned int
2526 tiqdio_set_delay_target(struct qdio_irq *irq_ptr, unsigned long delay_target)
2527 {
2528         unsigned int resp_code;
2529         int result;
2530         void *ptr;
2531         char dbf_text[15];
2532
2533         struct {
2534                 struct chsc_header request;
2535                 u16 operation_code;
2536                 u16 reserved1;
2537                 u32 reserved2;
2538                 u32 reserved3;
2539                 u32 reserved4[2];
2540                 u32 delay_target;
2541                 u32 reserved5[1009];
2542                 struct chsc_header response;
2543                 u32 reserved6;
2544         } *scsscf_area;
2545
2546         if (!irq_ptr->is_thinint_irq)
2547                 return -ENODEV;
2548
2549         scsscf_area = mempool_alloc(qdio_mempool_scssc, GFP_ATOMIC);
2550         if (!scsscf_area) {
2551                 QDIO_PRINT_WARN("No memory for setting delay target on " \
2552                                 "subchannel 0.%x.%x.\n",
2553                                 irq_ptr->schid.ssid, irq_ptr->schid.sch_no);
2554                 return -ENOMEM;
2555         }
2556         scsscf_area->request = (struct chsc_header) {
2557                 .length = 0x0fe0,
2558                 .code   = 0x1027,
2559         };
2560
2561         scsscf_area->delay_target = delay_target<<16;
2562
2563         result=chsc(scsscf_area);
2564         if (result) {
2565                 QDIO_PRINT_WARN("could not set delay target on irq 0.%x.%x, " \
2566                                 "cc=%i. Continuing.\n",
2567                                 irq_ptr->schid.ssid, irq_ptr->schid.sch_no,
2568                                 result);
2569                 result = -EIO;
2570                 goto out;
2571         }
2572
2573         resp_code = scsscf_area->response.code;
2574         if (resp_code!=QDIO_CHSC_RESPONSE_CODE_OK) {
2575                 QDIO_PRINT_WARN("response upon setting delay target " \
2576                                 "is 0x%x. Continuing.\n",resp_code);
2577                 sprintf(dbf_text,"sdtR%4x",resp_code);
2578                 QDIO_DBF_TEXT1(0,trace,dbf_text);
2579                 QDIO_DBF_TEXT1(0,setup,dbf_text);
2580                 ptr=&scsscf_area->response;
2581                 QDIO_DBF_HEX2(1,trace,&ptr,QDIO_DBF_TRACE_LEN);
2582         }
2583         QDIO_DBF_TEXT2(0,trace,"delytrgt");
2584         QDIO_DBF_HEX2(0,trace,&delay_target,sizeof(unsigned long));
2585         result = 0; /* not critical */
2586 out:
2587         mempool_free(scsscf_area, qdio_mempool_scssc);
2588         return result;
2589 }
2590
2591 int
2592 qdio_cleanup(struct ccw_device *cdev, int how)
2593 {
2594         struct qdio_irq *irq_ptr;
2595         char dbf_text[15];
2596         int rc;
2597
2598         irq_ptr = cdev->private->qdio_data;
2599         if (!irq_ptr)
2600                 return -ENODEV;
2601
2602         sprintf(dbf_text,"qcln%4x",irq_ptr->schid.sch_no);
2603         QDIO_DBF_TEXT1(0,trace,dbf_text);
2604         QDIO_DBF_TEXT0(0,setup,dbf_text);
2605
2606         rc = qdio_shutdown(cdev, how);
2607         if ((rc == 0) || (rc == -EINPROGRESS))
2608                 rc = qdio_free(cdev);
2609         return rc;
2610 }
2611
2612 int
2613 qdio_shutdown(struct ccw_device *cdev, int how)
2614 {
2615         struct qdio_irq *irq_ptr;
2616         int i;
2617         int result = 0;
2618         int rc;
2619         unsigned long flags;
2620         int timeout;
2621         char dbf_text[15];
2622
2623         irq_ptr = cdev->private->qdio_data;
2624         if (!irq_ptr)
2625                 return -ENODEV;
2626
2627         down(&irq_ptr->setting_up_sema);
2628
2629         sprintf(dbf_text,"qsqs%4x",irq_ptr->schid.sch_no);
2630         QDIO_DBF_TEXT1(0,trace,dbf_text);
2631         QDIO_DBF_TEXT0(0,setup,dbf_text);
2632
2633         /* mark all qs as uninteresting */
2634         for (i=0;i<irq_ptr->no_input_qs;i++)
2635                 atomic_set(&irq_ptr->input_qs[i]->is_in_shutdown,1);
2636
2637         for (i=0;i<irq_ptr->no_output_qs;i++)
2638                 atomic_set(&irq_ptr->output_qs[i]->is_in_shutdown,1);
2639
2640         tasklet_kill(&tiqdio_tasklet);
2641
2642         for (i=0;i<irq_ptr->no_input_qs;i++) {
2643                 qdio_unmark_q(irq_ptr->input_qs[i]);
2644                 tasklet_kill(&irq_ptr->input_qs[i]->tasklet);
2645                 wait_event_interruptible_timeout(cdev->private->wait_q,
2646                                                  !atomic_read(&irq_ptr->
2647                                                               input_qs[i]->
2648                                                               use_count),
2649                                                  QDIO_NO_USE_COUNT_TIMEOUT);
2650                 if (atomic_read(&irq_ptr->input_qs[i]->use_count))
2651                         result=-EINPROGRESS;
2652         }
2653
2654         for (i=0;i<irq_ptr->no_output_qs;i++) {
2655                 tasklet_kill(&irq_ptr->output_qs[i]->tasklet);
2656                 wait_event_interruptible_timeout(cdev->private->wait_q,
2657                                                  !atomic_read(&irq_ptr->
2658                                                               output_qs[i]->
2659                                                               use_count),
2660                                                  QDIO_NO_USE_COUNT_TIMEOUT);
2661                 if (atomic_read(&irq_ptr->output_qs[i]->use_count))
2662                         result=-EINPROGRESS;
2663         }
2664
2665         /* cleanup subchannel */
2666         spin_lock_irqsave(get_ccwdev_lock(cdev),flags);
2667         if (how&QDIO_FLAG_CLEANUP_USING_CLEAR) {
2668                 rc = ccw_device_clear(cdev, QDIO_DOING_CLEANUP);
2669                 timeout=QDIO_CLEANUP_CLEAR_TIMEOUT;
2670         } else if (how&QDIO_FLAG_CLEANUP_USING_HALT) {
2671                 rc = ccw_device_halt(cdev, QDIO_DOING_CLEANUP);
2672                 timeout=QDIO_CLEANUP_HALT_TIMEOUT;
2673         } else { /* default behaviour */
2674                 rc = ccw_device_halt(cdev, QDIO_DOING_CLEANUP);
2675                 timeout=QDIO_CLEANUP_HALT_TIMEOUT;
2676         }
2677         if (rc == -ENODEV) {
2678                 /* No need to wait for device no longer present. */
2679                 qdio_set_state(irq_ptr, QDIO_IRQ_STATE_INACTIVE);
2680                 spin_unlock_irqrestore(get_ccwdev_lock(cdev), flags);
2681         } else if (((void *)cdev->handler != (void *)qdio_handler) && rc == 0) {
2682                 /*
2683                  * Whoever put another handler there, has to cope with the
2684                  * interrupt theirself. Might happen if qdio_shutdown was
2685                  * called on already shutdown queues, but this shouldn't have
2686                  * bad side effects.
2687                  */
2688                 qdio_set_state(irq_ptr, QDIO_IRQ_STATE_INACTIVE);
2689                 spin_unlock_irqrestore(get_ccwdev_lock(cdev), flags);
2690         } else if (rc == 0) {
2691                 qdio_set_state(irq_ptr, QDIO_IRQ_STATE_CLEANUP);
2692                 ccw_device_set_timeout(cdev, timeout);
2693                 spin_unlock_irqrestore(get_ccwdev_lock(cdev),flags);
2694
2695                 wait_event(cdev->private->wait_q,
2696                            irq_ptr->state == QDIO_IRQ_STATE_INACTIVE ||
2697                            irq_ptr->state == QDIO_IRQ_STATE_ERR);
2698         } else {
2699                 QDIO_PRINT_INFO("ccw_device_{halt,clear} returned %d for "
2700                                 "device %s\n", result, cdev->dev.bus_id);
2701                 spin_unlock_irqrestore(get_ccwdev_lock(cdev), flags);
2702                 result = rc;
2703                 goto out;
2704         }
2705         if (irq_ptr->is_thinint_irq) {
2706                 qdio_put_indicator((__u32*)irq_ptr->dev_st_chg_ind);
2707                 tiqdio_set_subchannel_ind(irq_ptr,1);
2708                 /* reset adapter interrupt indicators */
2709         }
2710
2711         /* exchange int handlers, if necessary */
2712         if ((void*)cdev->handler == (void*)qdio_handler)
2713                 cdev->handler=irq_ptr->original_int_handler;
2714
2715         /* Ignore errors. */
2716         qdio_set_state(irq_ptr, QDIO_IRQ_STATE_INACTIVE);
2717         ccw_device_set_timeout(cdev, 0);
2718 out:
2719         up(&irq_ptr->setting_up_sema);
2720         return result;
2721 }
2722
2723 int
2724 qdio_free(struct ccw_device *cdev)
2725 {
2726         struct qdio_irq *irq_ptr;
2727         char dbf_text[15];
2728
2729         irq_ptr = cdev->private->qdio_data;
2730         if (!irq_ptr)
2731                 return -ENODEV;
2732
2733         down(&irq_ptr->setting_up_sema);
2734
2735         sprintf(dbf_text,"qfqs%4x",irq_ptr->schid.sch_no);
2736         QDIO_DBF_TEXT1(0,trace,dbf_text);
2737         QDIO_DBF_TEXT0(0,setup,dbf_text);
2738
2739         cdev->private->qdio_data = 0;
2740
2741         up(&irq_ptr->setting_up_sema);
2742
2743         qdio_release_irq_memory(irq_ptr);
2744         module_put(THIS_MODULE);
2745         return 0;
2746 }
2747
2748 static inline void
2749 qdio_allocate_do_dbf(struct qdio_initialize *init_data)
2750 {
2751         char dbf_text[20]; /* if a printf printed out more than 8 chars */
2752
2753         sprintf(dbf_text,"qfmt:%x",init_data->q_format);
2754         QDIO_DBF_TEXT0(0,setup,dbf_text);
2755         QDIO_DBF_HEX0(0,setup,init_data->adapter_name,8);
2756         sprintf(dbf_text,"qpff%4x",init_data->qib_param_field_format);
2757         QDIO_DBF_TEXT0(0,setup,dbf_text);
2758         QDIO_DBF_HEX0(0,setup,&init_data->qib_param_field,sizeof(char*));
2759         QDIO_DBF_HEX0(0,setup,&init_data->input_slib_elements,sizeof(long*));
2760         QDIO_DBF_HEX0(0,setup,&init_data->output_slib_elements,sizeof(long*));
2761         sprintf(dbf_text,"miit%4x",init_data->min_input_threshold);
2762         QDIO_DBF_TEXT0(0,setup,dbf_text);
2763         sprintf(dbf_text,"mait%4x",init_data->max_input_threshold);
2764         QDIO_DBF_TEXT0(0,setup,dbf_text);
2765         sprintf(dbf_text,"miot%4x",init_data->min_output_threshold);
2766         QDIO_DBF_TEXT0(0,setup,dbf_text);
2767         sprintf(dbf_text,"maot%4x",init_data->max_output_threshold);
2768         QDIO_DBF_TEXT0(0,setup,dbf_text);
2769         sprintf(dbf_text,"niq:%4x",init_data->no_input_qs);
2770         QDIO_DBF_TEXT0(0,setup,dbf_text);
2771         sprintf(dbf_text,"noq:%4x",init_data->no_output_qs);
2772         QDIO_DBF_TEXT0(0,setup,dbf_text);
2773         QDIO_DBF_HEX0(0,setup,&init_data->input_handler,sizeof(void*));
2774         QDIO_DBF_HEX0(0,setup,&init_data->output_handler,sizeof(void*));
2775         QDIO_DBF_HEX0(0,setup,&init_data->int_parm,sizeof(long));
2776         QDIO_DBF_HEX0(0,setup,&init_data->flags,sizeof(long));
2777         QDIO_DBF_HEX0(0,setup,&init_data->input_sbal_addr_array,sizeof(void*));
2778         QDIO_DBF_HEX0(0,setup,&init_data->output_sbal_addr_array,sizeof(void*));
2779 }
2780
2781 static inline void
2782 qdio_allocate_fill_input_desc(struct qdio_irq *irq_ptr, int i, int iqfmt)
2783 {
2784         irq_ptr->input_qs[i]->is_iqdio_q = iqfmt;
2785         irq_ptr->input_qs[i]->is_thinint_q = irq_ptr->is_thinint_irq;
2786
2787         irq_ptr->qdr->qdf0[i].sliba=(unsigned long)(irq_ptr->input_qs[i]->slib);
2788
2789         irq_ptr->qdr->qdf0[i].sla=(unsigned long)(irq_ptr->input_qs[i]->sl);
2790
2791         irq_ptr->qdr->qdf0[i].slsba=
2792                 (unsigned long)(&irq_ptr->input_qs[i]->slsb.acc.val[0]);
2793
2794         irq_ptr->qdr->qdf0[i].akey=QDIO_STORAGE_KEY;
2795         irq_ptr->qdr->qdf0[i].bkey=QDIO_STORAGE_KEY;
2796         irq_ptr->qdr->qdf0[i].ckey=QDIO_STORAGE_KEY;
2797         irq_ptr->qdr->qdf0[i].dkey=QDIO_STORAGE_KEY;
2798 }
2799
2800 static inline void
2801 qdio_allocate_fill_output_desc(struct qdio_irq *irq_ptr, int i,
2802                                int j, int iqfmt)
2803 {
2804         irq_ptr->output_qs[i]->is_iqdio_q = iqfmt;
2805         irq_ptr->output_qs[i]->is_thinint_q = irq_ptr->is_thinint_irq;
2806
2807         irq_ptr->qdr->qdf0[i+j].sliba=(unsigned long)(irq_ptr->output_qs[i]->slib);
2808
2809         irq_ptr->qdr->qdf0[i+j].sla=(unsigned long)(irq_ptr->output_qs[i]->sl);
2810
2811         irq_ptr->qdr->qdf0[i+j].slsba=
2812                 (unsigned long)(&irq_ptr->output_qs[i]->slsb.acc.val[0]);
2813
2814         irq_ptr->qdr->qdf0[i+j].akey=QDIO_STORAGE_KEY;
2815         irq_ptr->qdr->qdf0[i+j].bkey=QDIO_STORAGE_KEY;
2816         irq_ptr->qdr->qdf0[i+j].ckey=QDIO_STORAGE_KEY;
2817         irq_ptr->qdr->qdf0[i+j].dkey=QDIO_STORAGE_KEY;
2818 }
2819
2820
2821 static inline void
2822 qdio_initialize_set_siga_flags_input(struct qdio_irq *irq_ptr)
2823 {
2824         int i;
2825
2826         for (i=0;i<irq_ptr->no_input_qs;i++) {
2827                 irq_ptr->input_qs[i]->siga_sync=
2828                         irq_ptr->qdioac&CHSC_FLAG_SIGA_SYNC_NECESSARY;
2829                 irq_ptr->input_qs[i]->siga_in=
2830                         irq_ptr->qdioac&CHSC_FLAG_SIGA_INPUT_NECESSARY;
2831                 irq_ptr->input_qs[i]->siga_out=
2832                         irq_ptr->qdioac&CHSC_FLAG_SIGA_OUTPUT_NECESSARY;
2833                 irq_ptr->input_qs[i]->siga_sync_done_on_thinints=
2834                         irq_ptr->qdioac&CHSC_FLAG_SIGA_SYNC_DONE_ON_THININTS;
2835                 irq_ptr->input_qs[i]->hydra_gives_outbound_pcis=
2836                         irq_ptr->hydra_gives_outbound_pcis;
2837                 irq_ptr->input_qs[i]->siga_sync_done_on_outb_tis=
2838                         ((irq_ptr->qdioac&
2839                           (CHSC_FLAG_SIGA_SYNC_DONE_ON_OUTB_PCIS|
2840                            CHSC_FLAG_SIGA_SYNC_DONE_ON_THININTS))==
2841                          (CHSC_FLAG_SIGA_SYNC_DONE_ON_OUTB_PCIS|
2842                           CHSC_FLAG_SIGA_SYNC_DONE_ON_THININTS));
2843
2844         }
2845 }
2846
2847 static inline void
2848 qdio_initialize_set_siga_flags_output(struct qdio_irq *irq_ptr)
2849 {
2850         int i;
2851
2852         for (i=0;i<irq_ptr->no_output_qs;i++) {
2853                 irq_ptr->output_qs[i]->siga_sync=
2854                         irq_ptr->qdioac&CHSC_FLAG_SIGA_SYNC_NECESSARY;
2855                 irq_ptr->output_qs[i]->siga_in=
2856                         irq_ptr->qdioac&CHSC_FLAG_SIGA_INPUT_NECESSARY;
2857                 irq_ptr->output_qs[i]->siga_out=
2858                         irq_ptr->qdioac&CHSC_FLAG_SIGA_OUTPUT_NECESSARY;
2859                 irq_ptr->output_qs[i]->siga_sync_done_on_thinints=
2860                         irq_ptr->qdioac&CHSC_FLAG_SIGA_SYNC_DONE_ON_THININTS;
2861                 irq_ptr->output_qs[i]->hydra_gives_outbound_pcis=
2862                         irq_ptr->hydra_gives_outbound_pcis;
2863                 irq_ptr->output_qs[i]->siga_sync_done_on_outb_tis=
2864                         ((irq_ptr->qdioac&
2865                           (CHSC_FLAG_SIGA_SYNC_DONE_ON_OUTB_PCIS|
2866                            CHSC_FLAG_SIGA_SYNC_DONE_ON_THININTS))==
2867                          (CHSC_FLAG_SIGA_SYNC_DONE_ON_OUTB_PCIS|
2868                           CHSC_FLAG_SIGA_SYNC_DONE_ON_THININTS));
2869
2870         }
2871 }
2872
2873 static inline int
2874 qdio_establish_irq_check_for_errors(struct ccw_device *cdev, int cstat,
2875                                     int dstat)
2876 {
2877         char dbf_text[15];
2878         struct qdio_irq *irq_ptr;
2879
2880         irq_ptr = cdev->private->qdio_data;
2881
2882         if (cstat || (dstat & ~(DEV_STAT_CHN_END|DEV_STAT_DEV_END))) {
2883                 sprintf(dbf_text,"ick1%4x",irq_ptr->schid.sch_no);
2884                 QDIO_DBF_TEXT2(1,trace,dbf_text);
2885                 QDIO_DBF_HEX2(0,trace,&dstat,sizeof(int));
2886                 QDIO_DBF_HEX2(0,trace,&cstat,sizeof(int));
2887                 QDIO_PRINT_ERR("received check condition on establish " \
2888                                "queues on irq 0.%x.%x (cs=x%x, ds=x%x).\n",
2889                                irq_ptr->schid.ssid, irq_ptr->schid.sch_no,
2890                                cstat,dstat);
2891                 qdio_set_state(irq_ptr,QDIO_IRQ_STATE_ERR);
2892         }
2893
2894         if (!(dstat & DEV_STAT_DEV_END)) {
2895                 QDIO_DBF_TEXT2(1,setup,"eq:no de");
2896                 QDIO_DBF_HEX2(0,setup,&dstat, sizeof(dstat));
2897                 QDIO_DBF_HEX2(0,setup,&cstat, sizeof(cstat));
2898                 QDIO_PRINT_ERR("establish queues on irq 0.%x.%04x: didn't get "
2899                                "device end: dstat=%02x, cstat=%02x\n",
2900                                irq_ptr->schid.ssid, irq_ptr->schid.sch_no,
2901                                dstat, cstat);
2902                 qdio_set_state(irq_ptr, QDIO_IRQ_STATE_ERR);
2903                 return 1;
2904         }
2905
2906         if (dstat & ~(DEV_STAT_CHN_END|DEV_STAT_DEV_END)) {
2907                 QDIO_DBF_TEXT2(1,setup,"eq:badio");
2908                 QDIO_DBF_HEX2(0,setup,&dstat, sizeof(dstat));
2909                 QDIO_DBF_HEX2(0,setup,&cstat, sizeof(cstat));
2910                 QDIO_PRINT_ERR("establish queues on irq 0.%x.%04x: got "
2911                                "the following devstat: dstat=%02x, "
2912                                "cstat=%02x\n", irq_ptr->schid.ssid,
2913                                irq_ptr->schid.sch_no, dstat, cstat);
2914                 qdio_set_state(irq_ptr, QDIO_IRQ_STATE_ERR);
2915                 return 1;
2916         }
2917         return 0;
2918 }
2919
2920 static void
2921 qdio_establish_handle_irq(struct ccw_device *cdev, int cstat, int dstat)
2922 {
2923         struct qdio_irq *irq_ptr;
2924         char dbf_text[15];
2925
2926         irq_ptr = cdev->private->qdio_data;
2927
2928         sprintf(dbf_text,"qehi%4x",cdev->private->sch_no);
2929         QDIO_DBF_TEXT0(0,setup,dbf_text);
2930         QDIO_DBF_TEXT0(0,trace,dbf_text);
2931
2932         if (qdio_establish_irq_check_for_errors(cdev, cstat, dstat)) {
2933                 ccw_device_set_timeout(cdev, 0);
2934                 return;
2935         }
2936
2937         qdio_set_state(irq_ptr,QDIO_IRQ_STATE_ESTABLISHED);
2938         ccw_device_set_timeout(cdev, 0);
2939 }
2940
2941 int
2942 qdio_initialize(struct qdio_initialize *init_data)
2943 {
2944         int rc;
2945         char dbf_text[15];
2946
2947         sprintf(dbf_text,"qini%4x",init_data->cdev->private->sch_no);
2948         QDIO_DBF_TEXT0(0,setup,dbf_text);
2949         QDIO_DBF_TEXT0(0,trace,dbf_text);
2950
2951         rc = qdio_allocate(init_data);
2952         if (rc == 0) {
2953                 rc = qdio_establish(init_data);
2954                 if (rc != 0)
2955                         qdio_free(init_data->cdev);
2956         }
2957
2958         return rc;
2959 }
2960
2961
2962 int
2963 qdio_allocate(struct qdio_initialize *init_data)
2964 {
2965         struct qdio_irq *irq_ptr;
2966         char dbf_text[15];
2967
2968         sprintf(dbf_text,"qalc%4x",init_data->cdev->private->sch_no);
2969         QDIO_DBF_TEXT0(0,setup,dbf_text);
2970         QDIO_DBF_TEXT0(0,trace,dbf_text);
2971         if ( (init_data->no_input_qs>QDIO_MAX_QUEUES_PER_IRQ) ||
2972              (init_data->no_output_qs>QDIO_MAX_QUEUES_PER_IRQ) ||
2973              ((init_data->no_input_qs) && (!init_data->input_handler)) ||
2974              ((init_data->no_output_qs) && (!init_data->output_handler)) )
2975                 return -EINVAL;
2976
2977         if (!init_data->input_sbal_addr_array)
2978                 return -EINVAL;
2979
2980         if (!init_data->output_sbal_addr_array)
2981                 return -EINVAL;
2982
2983         qdio_allocate_do_dbf(init_data);
2984
2985         /* create irq */
2986         irq_ptr = (void *) get_zeroed_page(GFP_KERNEL | GFP_DMA);
2987
2988         QDIO_DBF_TEXT0(0,setup,"irq_ptr:");
2989         QDIO_DBF_HEX0(0,setup,&irq_ptr,sizeof(void*));
2990
2991         if (!irq_ptr) {
2992                 QDIO_PRINT_ERR("kmalloc of irq_ptr failed!\n");
2993                 return -ENOMEM;
2994         }
2995
2996         init_MUTEX(&irq_ptr->setting_up_sema);
2997
2998         /* QDR must be in DMA area since CCW data address is only 32 bit */
2999         irq_ptr->qdr=kmalloc(sizeof(struct qdr), GFP_KERNEL | GFP_DMA);
3000         if (!(irq_ptr->qdr)) {
3001                 free_page((unsigned long) irq_ptr);
3002                 QDIO_PRINT_ERR("kmalloc of irq_ptr->qdr failed!\n");
3003                 return -ENOMEM;
3004         }
3005         QDIO_DBF_TEXT0(0,setup,"qdr:");
3006         QDIO_DBF_HEX0(0,setup,&irq_ptr->qdr,sizeof(void*));
3007
3008         if (qdio_alloc_qs(irq_ptr,
3009                           init_data->no_input_qs,
3010                           init_data->no_output_qs)) {
3011                 qdio_release_irq_memory(irq_ptr);
3012                 return -ENOMEM;
3013         }
3014
3015         init_data->cdev->private->qdio_data = irq_ptr;
3016
3017         qdio_set_state(irq_ptr,QDIO_IRQ_STATE_INACTIVE);
3018
3019         return 0;
3020 }
3021
3022 int qdio_fill_irq(struct qdio_initialize *init_data)
3023 {
3024         int i;
3025         char dbf_text[15];
3026         struct ciw *ciw;
3027         int is_iqdio;
3028         struct qdio_irq *irq_ptr;
3029
3030         irq_ptr = init_data->cdev->private->qdio_data;
3031
3032         memset(irq_ptr,0,((char*)&irq_ptr->qdr)-((char*)irq_ptr));
3033
3034         /* wipes qib.ac, required by ar7063 */
3035         memset(irq_ptr->qdr,0,sizeof(struct qdr));
3036
3037         irq_ptr->int_parm=init_data->int_parm;
3038
3039         irq_ptr->schid = ccw_device_get_subchannel_id(init_data->cdev);
3040         irq_ptr->no_input_qs=init_data->no_input_qs;
3041         irq_ptr->no_output_qs=init_data->no_output_qs;
3042
3043         if (init_data->q_format==QDIO_IQDIO_QFMT) {
3044                 irq_ptr->is_iqdio_irq=1;
3045                 irq_ptr->is_thinint_irq=1;
3046         } else {
3047                 irq_ptr->is_iqdio_irq=0;
3048                 irq_ptr->is_thinint_irq=hydra_thinints;
3049         }
3050         sprintf(dbf_text,"is_i_t%1x%1x",
3051                 irq_ptr->is_iqdio_irq,irq_ptr->is_thinint_irq);
3052         QDIO_DBF_TEXT2(0,setup,dbf_text);
3053
3054         if (irq_ptr->is_thinint_irq) {
3055                 irq_ptr->dev_st_chg_ind = qdio_get_indicator();
3056                 QDIO_DBF_HEX1(0,setup,&irq_ptr->dev_st_chg_ind,sizeof(void*));
3057                 if (!irq_ptr->dev_st_chg_ind) {
3058                         QDIO_PRINT_WARN("no indicator location available " \
3059                                         "for irq 0.%x.%x\n",
3060                                         irq_ptr->schid.ssid, irq_ptr->schid.sch_no);
3061                         qdio_release_irq_memory(irq_ptr);
3062                         return -ENOBUFS;
3063                 }
3064         }
3065
3066         /* defaults */
3067         irq_ptr->equeue.cmd=DEFAULT_ESTABLISH_QS_CMD;
3068         irq_ptr->equeue.count=DEFAULT_ESTABLISH_QS_COUNT;
3069         irq_ptr->aqueue.cmd=DEFAULT_ACTIVATE_QS_CMD;
3070         irq_ptr->aqueue.count=DEFAULT_ACTIVATE_QS_COUNT;
3071
3072         qdio_fill_qs(irq_ptr, init_data->cdev,
3073                      init_data->no_input_qs,
3074                      init_data->no_output_qs,
3075                      init_data->input_handler,
3076                      init_data->output_handler,init_data->int_parm,
3077                      init_data->q_format,init_data->flags,
3078                      init_data->input_sbal_addr_array,
3079                      init_data->output_sbal_addr_array);
3080
3081         if (!try_module_get(THIS_MODULE)) {
3082                 QDIO_PRINT_CRIT("try_module_get() failed!\n");
3083                 qdio_release_irq_memory(irq_ptr);
3084                 return -EINVAL;
3085         }
3086
3087         qdio_fill_thresholds(irq_ptr,init_data->no_input_qs,
3088                              init_data->no_output_qs,
3089                              init_data->min_input_threshold,
3090                              init_data->max_input_threshold,
3091                              init_data->min_output_threshold,
3092                              init_data->max_output_threshold);
3093
3094         /* fill in qdr */
3095         irq_ptr->qdr->qfmt=init_data->q_format;
3096         irq_ptr->qdr->iqdcnt=init_data->no_input_qs;
3097         irq_ptr->qdr->oqdcnt=init_data->no_output_qs;
3098         irq_ptr->qdr->iqdsz=sizeof(struct qdesfmt0)/4; /* size in words */
3099         irq_ptr->qdr->oqdsz=sizeof(struct qdesfmt0)/4;
3100
3101         irq_ptr->qdr->qiba=(unsigned long)&irq_ptr->qib;
3102         irq_ptr->qdr->qkey=QDIO_STORAGE_KEY;
3103
3104         /* fill in qib */
3105         irq_ptr->is_qebsm = is_passthrough;
3106         if (irq_ptr->is_qebsm)
3107                 irq_ptr->qib.rflags |= QIB_RFLAGS_ENABLE_QEBSM;
3108
3109         irq_ptr->qib.qfmt=init_data->q_format;
3110         if (init_data->no_input_qs)
3111                 irq_ptr->qib.isliba=(unsigned long)(irq_ptr->input_qs[0]->slib);
3112         if (init_data->no_output_qs)
3113                 irq_ptr->qib.osliba=(unsigned long)(irq_ptr->output_qs[0]->slib);
3114         memcpy(irq_ptr->qib.ebcnam,init_data->adapter_name,8);
3115
3116         qdio_set_impl_params(irq_ptr,init_data->qib_param_field_format,
3117                              init_data->qib_param_field,
3118                              init_data->no_input_qs,
3119                              init_data->no_output_qs,
3120                              init_data->input_slib_elements,
3121                              init_data->output_slib_elements);
3122
3123         /* first input descriptors, then output descriptors */
3124         is_iqdio = (init_data->q_format == QDIO_IQDIO_QFMT) ? 1 : 0;
3125         for (i=0;i<init_data->no_input_qs;i++)
3126                 qdio_allocate_fill_input_desc(irq_ptr, i, is_iqdio);
3127
3128         for (i=0;i<init_data->no_output_qs;i++)
3129                 qdio_allocate_fill_output_desc(irq_ptr, i,
3130                                                init_data->no_input_qs,
3131                                                is_iqdio);
3132
3133         /* qdr, qib, sls, slsbs, slibs, sbales filled. */
3134
3135         /* get qdio commands */
3136         ciw = ccw_device_get_ciw(init_data->cdev, CIW_TYPE_EQUEUE);
3137         if (!ciw) {
3138                 QDIO_DBF_TEXT2(1,setup,"no eq");
3139                 QDIO_PRINT_INFO("No equeue CIW found for QDIO commands. "
3140                                 "Trying to use default.\n");
3141         } else
3142                 irq_ptr->equeue = *ciw;
3143         ciw = ccw_device_get_ciw(init_data->cdev, CIW_TYPE_AQUEUE);
3144         if (!ciw) {
3145                 QDIO_DBF_TEXT2(1,setup,"no aq");
3146                 QDIO_PRINT_INFO("No aqueue CIW found for QDIO commands. "
3147                                 "Trying to use default.\n");
3148         } else
3149                 irq_ptr->aqueue = *ciw;
3150
3151         /* Set new interrupt handler. */
3152         irq_ptr->original_int_handler = init_data->cdev->handler;
3153         init_data->cdev->handler = qdio_handler;
3154
3155         return 0;
3156 }
3157
3158 int
3159 qdio_establish(struct qdio_initialize *init_data)
3160 {
3161         struct qdio_irq *irq_ptr;
3162         unsigned long saveflags;
3163         int result, result2;
3164         struct ccw_device *cdev;
3165         char dbf_text[20];
3166
3167         cdev=init_data->cdev;
3168         irq_ptr = cdev->private->qdio_data;
3169         if (!irq_ptr)
3170                 return -EINVAL;
3171
3172         if (cdev->private->state != DEV_STATE_ONLINE)
3173                 return -EINVAL;
3174
3175         down(&irq_ptr->setting_up_sema);
3176
3177         qdio_fill_irq(init_data);
3178
3179         /* the thinint CHSC stuff */
3180         if (irq_ptr->is_thinint_irq) {
3181
3182                 result = tiqdio_set_subchannel_ind(irq_ptr,0);
3183                 if (result) {
3184                         up(&irq_ptr->setting_up_sema);
3185                         qdio_shutdown(cdev, QDIO_FLAG_CLEANUP_USING_CLEAR);
3186                         return result;
3187                 }
3188                 tiqdio_set_delay_target(irq_ptr,TIQDIO_DELAY_TARGET);
3189         }
3190
3191         sprintf(dbf_text,"qest%4x",cdev->private->sch_no);
3192         QDIO_DBF_TEXT0(0,setup,dbf_text);
3193         QDIO_DBF_TEXT0(0,trace,dbf_text);
3194
3195         /* establish q */
3196         irq_ptr->ccw.cmd_code=irq_ptr->equeue.cmd;
3197         irq_ptr->ccw.flags=CCW_FLAG_SLI;
3198         irq_ptr->ccw.count=irq_ptr->equeue.count;
3199         irq_ptr->ccw.cda=QDIO_GET_ADDR(irq_ptr->qdr);
3200
3201         spin_lock_irqsave(get_ccwdev_lock(cdev),saveflags);
3202
3203         ccw_device_set_options(cdev, 0);
3204         result=ccw_device_start_timeout(cdev,&irq_ptr->ccw,
3205                                         QDIO_DOING_ESTABLISH,0, 0,
3206                                         QDIO_ESTABLISH_TIMEOUT);
3207         if (result) {
3208                 result2=ccw_device_start_timeout(cdev,&irq_ptr->ccw,
3209                                                  QDIO_DOING_ESTABLISH,0,0,
3210                                                  QDIO_ESTABLISH_TIMEOUT);
3211                 sprintf(dbf_text,"eq:io%4x",result);
3212                 QDIO_DBF_TEXT2(1,setup,dbf_text);
3213                 if (result2) {
3214                         sprintf(dbf_text,"eq:io%4x",result);
3215                         QDIO_DBF_TEXT2(1,setup,dbf_text);
3216                 }
3217                 QDIO_PRINT_WARN("establish queues on irq 0.%x.%04x: do_IO " \
3218                                 "returned %i, next try returned %i\n",
3219                                 irq_ptr->schid.ssid, irq_ptr->schid.sch_no,
3220                                 result, result2);
3221                 result=result2;
3222                 if (result)
3223                         ccw_device_set_timeout(cdev, 0);
3224         }
3225
3226         spin_unlock_irqrestore(get_ccwdev_lock(cdev),saveflags);
3227
3228         if (result) {
3229                 up(&irq_ptr->setting_up_sema);
3230                 qdio_shutdown(cdev,QDIO_FLAG_CLEANUP_USING_CLEAR);
3231                 return result;
3232         }
3233
3234         /* Timeout is cared for already by using ccw_device_start_timeout(). */
3235         wait_event_interruptible(cdev->private->wait_q,
3236                  irq_ptr->state == QDIO_IRQ_STATE_ESTABLISHED ||
3237                  irq_ptr->state == QDIO_IRQ_STATE_ERR);
3238
3239         if (irq_ptr->state == QDIO_IRQ_STATE_ESTABLISHED)
3240                 result = 0;
3241         else {
3242                 up(&irq_ptr->setting_up_sema);
3243                 qdio_shutdown(cdev, QDIO_FLAG_CLEANUP_USING_CLEAR);
3244                 return -EIO;
3245         }
3246
3247         qdio_get_ssqd_information(irq_ptr);
3248         /* if this gets set once, we're running under VM and can omit SVSes */
3249         if (irq_ptr->qdioac&CHSC_FLAG_SIGA_SYNC_NECESSARY)
3250                 omit_svs=1;
3251
3252         sprintf(dbf_text,"qdioac%2x",irq_ptr->qdioac);
3253         QDIO_DBF_TEXT2(0,setup,dbf_text);
3254
3255         sprintf(dbf_text,"qib ac%2x",irq_ptr->qib.ac);
3256         QDIO_DBF_TEXT2(0,setup,dbf_text);
3257
3258         irq_ptr->hydra_gives_outbound_pcis=
3259                 irq_ptr->qib.ac&QIB_AC_OUTBOUND_PCI_SUPPORTED;
3260         irq_ptr->sync_done_on_outb_pcis=
3261                 irq_ptr->qdioac&CHSC_FLAG_SIGA_SYNC_DONE_ON_OUTB_PCIS;
3262
3263         qdio_initialize_set_siga_flags_input(irq_ptr);
3264         qdio_initialize_set_siga_flags_output(irq_ptr);
3265
3266         up(&irq_ptr->setting_up_sema);
3267
3268         return result;
3269
3270 }
3271
3272 int
3273 qdio_activate(struct ccw_device *cdev, int flags)
3274 {
3275         struct qdio_irq *irq_ptr;
3276         int i,result=0,result2;
3277         unsigned long saveflags;
3278         char dbf_text[20]; /* see qdio_initialize */
3279
3280         irq_ptr = cdev->private->qdio_data;
3281         if (!irq_ptr)
3282                 return -ENODEV;
3283
3284         if (cdev->private->state != DEV_STATE_ONLINE)
3285                 return -EINVAL;
3286
3287         down(&irq_ptr->setting_up_sema);
3288         if (irq_ptr->state==QDIO_IRQ_STATE_INACTIVE) {
3289                 result=-EBUSY;
3290                 goto out;
3291         }
3292
3293         sprintf(dbf_text,"qact%4x", irq_ptr->schid.sch_no);
3294         QDIO_DBF_TEXT2(0,setup,dbf_text);
3295         QDIO_DBF_TEXT2(0,trace,dbf_text);
3296
3297         /* activate q */
3298         irq_ptr->ccw.cmd_code=irq_ptr->aqueue.cmd;
3299         irq_ptr->ccw.flags=CCW_FLAG_SLI;
3300         irq_ptr->ccw.count=irq_ptr->aqueue.count;
3301         irq_ptr->ccw.cda=QDIO_GET_ADDR(0);
3302
3303         spin_lock_irqsave(get_ccwdev_lock(cdev),saveflags);
3304
3305         ccw_device_set_timeout(cdev, 0);
3306         ccw_device_set_options(cdev, CCWDEV_REPORT_ALL);
3307         result=ccw_device_start(cdev,&irq_ptr->ccw,QDIO_DOING_ACTIVATE,
3308                                 0, DOIO_DENY_PREFETCH);
3309         if (result) {
3310                 result2=ccw_device_start(cdev,&irq_ptr->ccw,
3311                                          QDIO_DOING_ACTIVATE,0,0);
3312                 sprintf(dbf_text,"aq:io%4x",result);
3313                 QDIO_DBF_TEXT2(1,setup,dbf_text);
3314                 if (result2) {
3315                         sprintf(dbf_text,"aq:io%4x",result);
3316                         QDIO_DBF_TEXT2(1,setup,dbf_text);
3317                 }
3318                 QDIO_PRINT_WARN("activate queues on irq 0.%x.%04x: do_IO " \
3319                                 "returned %i, next try returned %i\n",
3320                                 irq_ptr->schid.ssid, irq_ptr->schid.sch_no,
3321                                 result, result2);
3322                 result=result2;
3323         }
3324
3325         spin_unlock_irqrestore(get_ccwdev_lock(cdev),saveflags);
3326         if (result)
3327                 goto out;
3328
3329         for (i=0;i<irq_ptr->no_input_qs;i++) {
3330                 if (irq_ptr->is_thinint_irq) {
3331                         /*
3332                          * that way we know, that, if we will get interrupted
3333                          * by tiqdio_inbound_processing, qdio_unmark_q will
3334                          * not be called
3335                          */
3336                         qdio_reserve_q(irq_ptr->input_qs[i]);
3337                         qdio_mark_tiq(irq_ptr->input_qs[i]);
3338                         qdio_release_q(irq_ptr->input_qs[i]);
3339                 }
3340         }
3341
3342         if (flags&QDIO_FLAG_NO_INPUT_INTERRUPT_CONTEXT) {
3343                 for (i=0;i<irq_ptr->no_input_qs;i++) {
3344                         irq_ptr->input_qs[i]->is_input_q|=
3345                                 QDIO_FLAG_NO_INPUT_INTERRUPT_CONTEXT;
3346                 }
3347         }
3348
3349         wait_event_interruptible_timeout(cdev->private->wait_q,
3350                                          ((irq_ptr->state ==
3351                                           QDIO_IRQ_STATE_STOPPED) ||
3352                                           (irq_ptr->state ==
3353                                            QDIO_IRQ_STATE_ERR)),
3354                                          QDIO_ACTIVATE_TIMEOUT);
3355
3356         switch (irq_ptr->state) {
3357         case QDIO_IRQ_STATE_STOPPED:
3358         case QDIO_IRQ_STATE_ERR:
3359                 up(&irq_ptr->setting_up_sema);
3360                 qdio_shutdown(cdev, QDIO_FLAG_CLEANUP_USING_CLEAR);
3361                 down(&irq_ptr->setting_up_sema);
3362                 result = -EIO;
3363                 break;
3364         default:
3365                 qdio_set_state(irq_ptr, QDIO_IRQ_STATE_ACTIVE);
3366                 result = 0;
3367         }
3368  out:
3369         up(&irq_ptr->setting_up_sema);
3370
3371         return result;
3372 }
3373
3374 /* buffers filled forwards again to make Rick happy */
3375 static inline void
3376 qdio_do_qdio_fill_input(struct qdio_q *q, unsigned int qidx,
3377                         unsigned int count, struct qdio_buffer *buffers)
3378 {
3379         struct qdio_irq *irq = (struct qdio_irq *) q->irq_ptr;
3380         qidx &= (QDIO_MAX_BUFFERS_PER_Q - 1);
3381         if (irq->is_qebsm) {
3382                 while (count)
3383                         set_slsb(q, &qidx, SLSB_CU_INPUT_EMPTY, &count);
3384                 return;
3385         }
3386         for (;;) {
3387                 set_slsb(q, &qidx, SLSB_CU_INPUT_EMPTY, &count);
3388                 count--;
3389                 if (!count) break;
3390                 qidx = (qidx + 1) & (QDIO_MAX_BUFFERS_PER_Q - 1);
3391         }
3392 }
3393
3394 static inline void
3395 qdio_do_qdio_fill_output(struct qdio_q *q, unsigned int qidx,
3396                          unsigned int count, struct qdio_buffer *buffers)
3397 {
3398         struct qdio_irq *irq = (struct qdio_irq *) q->irq_ptr;
3399
3400         qidx &= (QDIO_MAX_BUFFERS_PER_Q - 1);
3401         if (irq->is_qebsm) {
3402                 while (count)
3403                         set_slsb(q, &qidx, SLSB_CU_OUTPUT_PRIMED, &count);
3404                 return;
3405         }
3406
3407         for (;;) {
3408                 set_slsb(q, &qidx, SLSB_CU_OUTPUT_PRIMED, &count);
3409                 count--;
3410                 if (!count) break;
3411                 qidx = (qidx + 1) & (QDIO_MAX_BUFFERS_PER_Q - 1);
3412         }
3413 }
3414
3415 static inline void
3416 do_qdio_handle_inbound(struct qdio_q *q, unsigned int callflags,
3417                        unsigned int qidx, unsigned int count,
3418                        struct qdio_buffer *buffers)
3419 {
3420         int used_elements;
3421
3422         /* This is the inbound handling of queues */
3423         used_elements=atomic_add_return(count, &q->number_of_buffers_used) - count;
3424
3425         qdio_do_qdio_fill_input(q,qidx,count,buffers);
3426
3427         if ((used_elements+count==QDIO_MAX_BUFFERS_PER_Q)&&
3428             (callflags&QDIO_FLAG_UNDER_INTERRUPT))
3429                 atomic_swap(&q->polling,0);
3430
3431         if (used_elements)
3432                 return;
3433         if (callflags&QDIO_FLAG_DONT_SIGA)
3434                 return;
3435         if (q->siga_in) {
3436                 int result;
3437
3438                 result=qdio_siga_input(q);
3439                 if (result) {
3440                         if (q->siga_error)
3441                                 q->error_status_flags|=
3442                                         QDIO_STATUS_MORE_THAN_ONE_SIGA_ERROR;
3443                         q->error_status_flags|=QDIO_STATUS_LOOK_FOR_ERROR;
3444                         q->siga_error=result;
3445                 }
3446         }
3447
3448         qdio_mark_q(q);
3449 }
3450
3451 static inline void
3452 do_qdio_handle_outbound(struct qdio_q *q, unsigned int callflags,
3453                         unsigned int qidx, unsigned int count,
3454                         struct qdio_buffer *buffers)
3455 {
3456         int used_elements;
3457         unsigned int cnt, start_buf;
3458         unsigned char state = 0;
3459         struct qdio_irq *irq = (struct qdio_irq *) q->irq_ptr;
3460
3461         /* This is the outbound handling of queues */
3462 #ifdef QDIO_PERFORMANCE_STATS
3463         perf_stats.start_time_outbound=NOW;
3464 #endif /* QDIO_PERFORMANCE_STATS */
3465
3466         qdio_do_qdio_fill_output(q,qidx,count,buffers);
3467
3468         used_elements=atomic_add_return(count, &q->number_of_buffers_used) - count;
3469
3470         if (callflags&QDIO_FLAG_DONT_SIGA) {
3471 #ifdef QDIO_PERFORMANCE_STATS
3472                 perf_stats.outbound_time+=NOW-perf_stats.start_time_outbound;
3473                 perf_stats.outbound_cnt++;
3474 #endif /* QDIO_PERFORMANCE_STATS */
3475                 return;
3476         }
3477         if (q->is_iqdio_q) {
3478                 /* one siga for every sbal */
3479                 while (count--)
3480                         qdio_kick_outbound_q(q);
3481
3482                 __qdio_outbound_processing(q);
3483         } else {
3484                 /* under VM, we do a SIGA sync unconditionally */
3485                 SYNC_MEMORY;
3486                 else {
3487                         /*
3488                          * w/o shadow queues (else branch of
3489                          * SYNC_MEMORY :-/ ), we try to
3490                          * fast-requeue buffers
3491                          */
3492                         if (irq->is_qebsm) {
3493                                 cnt = 1;
3494                                 start_buf = ((qidx+QDIO_MAX_BUFFERS_PER_Q-1) &
3495                                              (QDIO_MAX_BUFFERS_PER_Q-1));
3496                                 qdio_do_eqbs(q, &state, &start_buf, &cnt);
3497                         } else
3498                                 state = q->slsb.acc.val[(qidx+QDIO_MAX_BUFFERS_PER_Q-1)
3499                                         &(QDIO_MAX_BUFFERS_PER_Q-1) ];
3500                          if (state != SLSB_CU_OUTPUT_PRIMED) {
3501                                 qdio_kick_outbound_q(q);
3502                         } else {
3503                                 QDIO_DBF_TEXT3(0,trace, "fast-req");
3504 #ifdef QDIO_PERFORMANCE_STATS
3505                                 perf_stats.fast_reqs++;
3506 #endif /* QDIO_PERFORMANCE_STATS */
3507                         }
3508                 }
3509                 /*
3510                  * only marking the q could take too long,
3511                  * the upper layer module could do a lot of
3512                  * traffic in that time
3513                  */
3514                 __qdio_outbound_processing(q);
3515         }
3516
3517 #ifdef QDIO_PERFORMANCE_STATS
3518         perf_stats.outbound_time+=NOW-perf_stats.start_time_outbound;
3519         perf_stats.outbound_cnt++;
3520 #endif /* QDIO_PERFORMANCE_STATS */
3521 }
3522
3523 /* count must be 1 in iqdio */
3524 int
3525 do_QDIO(struct ccw_device *cdev,unsigned int callflags,
3526         unsigned int queue_number, unsigned int qidx,
3527         unsigned int count,struct qdio_buffer *buffers)
3528 {
3529         struct qdio_irq *irq_ptr;
3530 #ifdef CONFIG_QDIO_DEBUG
3531         char dbf_text[20];
3532
3533         sprintf(dbf_text,"doQD%04x",cdev->private->sch_no);
3534         QDIO_DBF_TEXT3(0,trace,dbf_text);
3535 #endif /* CONFIG_QDIO_DEBUG */
3536
3537         if ( (qidx>QDIO_MAX_BUFFERS_PER_Q) ||
3538              (count>QDIO_MAX_BUFFERS_PER_Q) ||
3539              (queue_number>QDIO_MAX_QUEUES_PER_IRQ) )
3540                 return -EINVAL;
3541
3542         if (count==0)
3543                 return 0;
3544
3545         irq_ptr = cdev->private->qdio_data;
3546         if (!irq_ptr)
3547                 return -ENODEV;
3548
3549 #ifdef CONFIG_QDIO_DEBUG
3550         if (callflags&QDIO_FLAG_SYNC_INPUT)
3551                 QDIO_DBF_HEX3(0,trace,&irq_ptr->input_qs[queue_number],
3552                               sizeof(void*));
3553         else
3554                 QDIO_DBF_HEX3(0,trace,&irq_ptr->output_qs[queue_number],
3555                               sizeof(void*));
3556         sprintf(dbf_text,"flag%04x",callflags);
3557         QDIO_DBF_TEXT3(0,trace,dbf_text);
3558         sprintf(dbf_text,"qi%02xct%02x",qidx,count);
3559         QDIO_DBF_TEXT3(0,trace,dbf_text);
3560 #endif /* CONFIG_QDIO_DEBUG */
3561
3562         if (irq_ptr->state!=QDIO_IRQ_STATE_ACTIVE)
3563                 return -EBUSY;
3564
3565         if (callflags&QDIO_FLAG_SYNC_INPUT)
3566                 do_qdio_handle_inbound(irq_ptr->input_qs[queue_number],
3567                                        callflags, qidx, count, buffers);
3568         else if (callflags&QDIO_FLAG_SYNC_OUTPUT)
3569                 do_qdio_handle_outbound(irq_ptr->output_qs[queue_number],
3570                                         callflags, qidx, count, buffers);
3571         else {
3572                 QDIO_DBF_TEXT3(1,trace,"doQD:inv");
3573                 return -EINVAL;
3574         }
3575         return 0;
3576 }
3577
3578 #ifdef QDIO_PERFORMANCE_STATS
3579 static int
3580 qdio_perf_procfile_read(char *buffer, char **buffer_location, off_t offset,
3581                         int buffer_length, int *eof, void *data)
3582 {
3583         int c=0;
3584
3585         /* we are always called with buffer_length=4k, so we all
3586            deliver on the first read */
3587         if (offset>0)
3588                 return 0;
3589
3590 #define _OUTP_IT(x...) c+=sprintf(buffer+c,x)
3591         _OUTP_IT("i_p_nc/c=%lu/%lu\n",i_p_nc,i_p_c);
3592         _OUTP_IT("ii_p_nc/c=%lu/%lu\n",ii_p_nc,ii_p_c);
3593         _OUTP_IT("o_p_nc/c=%lu/%lu\n",o_p_nc,o_p_c);
3594         _OUTP_IT("Number of tasklet runs (total)                  : %u\n",
3595                  perf_stats.tl_runs);
3596         _OUTP_IT("\n");
3597         _OUTP_IT("Number of SIGA sync's issued                    : %u\n",
3598                  perf_stats.siga_syncs);
3599         _OUTP_IT("Number of SIGA in's issued                      : %u\n",
3600                  perf_stats.siga_ins);
3601         _OUTP_IT("Number of SIGA out's issued                     : %u\n",
3602                  perf_stats.siga_outs);
3603         _OUTP_IT("Number of PCIs caught                           : %u\n",
3604                  perf_stats.pcis);
3605         _OUTP_IT("Number of adapter interrupts caught             : %u\n",
3606                  perf_stats.thinints);
3607         _OUTP_IT("Number of fast requeues (outg. SBALs w/o SIGA)  : %u\n",
3608                  perf_stats.fast_reqs);
3609         _OUTP_IT("\n");
3610         _OUTP_IT("Total time of all inbound actions (us) incl. UL : %u\n",
3611                  perf_stats.inbound_time);
3612         _OUTP_IT("Number of inbound transfers                     : %u\n",
3613                  perf_stats.inbound_cnt);
3614         _OUTP_IT("Total time of all outbound do_QDIOs (us)        : %u\n",
3615                  perf_stats.outbound_time);
3616         _OUTP_IT("Number of do_QDIOs outbound                     : %u\n",
3617                  perf_stats.outbound_cnt);
3618         _OUTP_IT("\n");
3619
3620         return c;
3621 }
3622
3623 static struct proc_dir_entry *qdio_perf_proc_file;
3624 #endif /* QDIO_PERFORMANCE_STATS */
3625
3626 static void
3627 qdio_add_procfs_entry(void)
3628 {
3629 #ifdef QDIO_PERFORMANCE_STATS
3630         proc_perf_file_registration=0;
3631         qdio_perf_proc_file=create_proc_entry(QDIO_PERF,
3632                                               S_IFREG|0444,&proc_root);
3633         if (qdio_perf_proc_file) {
3634                 qdio_perf_proc_file->read_proc=&qdio_perf_procfile_read;
3635         } else proc_perf_file_registration=-1;
3636
3637         if (proc_perf_file_registration)
3638                 QDIO_PRINT_WARN("was not able to register perf. " \
3639                                 "proc-file (%i).\n",
3640                                 proc_perf_file_registration);
3641 #endif /* QDIO_PERFORMANCE_STATS */
3642 }
3643
3644 static void
3645 qdio_remove_procfs_entry(void)
3646 {
3647 #ifdef QDIO_PERFORMANCE_STATS
3648         perf_stats.tl_runs=0;
3649
3650         if (!proc_perf_file_registration) /* means if it went ok earlier */
3651                 remove_proc_entry(QDIO_PERF,&proc_root);
3652 #endif /* QDIO_PERFORMANCE_STATS */
3653 }
3654
3655 static void
3656 tiqdio_register_thinints(void)
3657 {
3658         char dbf_text[20];
3659         register_thinint_result=
3660                 s390_register_adapter_interrupt(&tiqdio_thinint_handler);
3661         if (register_thinint_result) {
3662                 sprintf(dbf_text,"regthn%x",(register_thinint_result&0xff));
3663                 QDIO_DBF_TEXT0(0,setup,dbf_text);
3664                 QDIO_PRINT_ERR("failed to register adapter handler " \
3665                                "(rc=%i).\nAdapter interrupts might " \
3666                                "not work. Continuing.\n",
3667                                register_thinint_result);
3668         }
3669 }
3670
3671 static void
3672 tiqdio_unregister_thinints(void)
3673 {
3674         if (!register_thinint_result)
3675                 s390_unregister_adapter_interrupt(&tiqdio_thinint_handler);
3676 }
3677
3678 static int
3679 qdio_get_qdio_memory(void)
3680 {
3681         int i;
3682         indicator_used[0]=1;
3683
3684         for (i=1;i<INDICATORS_PER_CACHELINE;i++)
3685                 indicator_used[i]=0;
3686         indicators = kzalloc(sizeof(__u32)*(INDICATORS_PER_CACHELINE),
3687                                    GFP_KERNEL);
3688         if (!indicators)
3689                 return -ENOMEM;
3690         return 0;
3691 }
3692
3693 static void
3694 qdio_release_qdio_memory(void)
3695 {
3696         kfree(indicators);
3697 }
3698
3699 static void
3700 qdio_unregister_dbf_views(void)
3701 {
3702         if (qdio_dbf_setup)
3703                 debug_unregister(qdio_dbf_setup);
3704         if (qdio_dbf_sbal)
3705                 debug_unregister(qdio_dbf_sbal);
3706         if (qdio_dbf_sense)
3707                 debug_unregister(qdio_dbf_sense);
3708         if (qdio_dbf_trace)
3709                 debug_unregister(qdio_dbf_trace);
3710 #ifdef CONFIG_QDIO_DEBUG
3711         if (qdio_dbf_slsb_out)
3712                 debug_unregister(qdio_dbf_slsb_out);
3713         if (qdio_dbf_slsb_in)
3714                 debug_unregister(qdio_dbf_slsb_in);
3715 #endif /* CONFIG_QDIO_DEBUG */
3716 }
3717
3718 static int
3719 qdio_register_dbf_views(void)
3720 {
3721         qdio_dbf_setup=debug_register(QDIO_DBF_SETUP_NAME,
3722                                       QDIO_DBF_SETUP_PAGES,
3723                                       QDIO_DBF_SETUP_NR_AREAS,
3724                                       QDIO_DBF_SETUP_LEN);
3725         if (!qdio_dbf_setup)
3726                 goto oom;
3727         debug_register_view(qdio_dbf_setup,&debug_hex_ascii_view);
3728         debug_set_level(qdio_dbf_setup,QDIO_DBF_SETUP_LEVEL);
3729
3730         qdio_dbf_sbal=debug_register(QDIO_DBF_SBAL_NAME,
3731                                      QDIO_DBF_SBAL_PAGES,
3732                                      QDIO_DBF_SBAL_NR_AREAS,
3733                                      QDIO_DBF_SBAL_LEN);
3734         if (!qdio_dbf_sbal)
3735                 goto oom;
3736
3737         debug_register_view(qdio_dbf_sbal,&debug_hex_ascii_view);
3738         debug_set_level(qdio_dbf_sbal,QDIO_DBF_SBAL_LEVEL);
3739
3740         qdio_dbf_sense=debug_register(QDIO_DBF_SENSE_NAME,
3741                                       QDIO_DBF_SENSE_PAGES,
3742                                       QDIO_DBF_SENSE_NR_AREAS,
3743                                       QDIO_DBF_SENSE_LEN);
3744         if (!qdio_dbf_sense)
3745                 goto oom;
3746
3747         debug_register_view(qdio_dbf_sense,&debug_hex_ascii_view);
3748         debug_set_level(qdio_dbf_sense,QDIO_DBF_SENSE_LEVEL);
3749
3750         qdio_dbf_trace=debug_register(QDIO_DBF_TRACE_NAME,
3751                                       QDIO_DBF_TRACE_PAGES,
3752                                       QDIO_DBF_TRACE_NR_AREAS,
3753                                       QDIO_DBF_TRACE_LEN);
3754         if (!qdio_dbf_trace)
3755                 goto oom;
3756
3757         debug_register_view(qdio_dbf_trace,&debug_hex_ascii_view);
3758         debug_set_level(qdio_dbf_trace,QDIO_DBF_TRACE_LEVEL);
3759
3760 #ifdef CONFIG_QDIO_DEBUG
3761         qdio_dbf_slsb_out=debug_register(QDIO_DBF_SLSB_OUT_NAME,
3762                                          QDIO_DBF_SLSB_OUT_PAGES,
3763                                          QDIO_DBF_SLSB_OUT_NR_AREAS,
3764                                          QDIO_DBF_SLSB_OUT_LEN);
3765         if (!qdio_dbf_slsb_out)
3766                 goto oom;
3767         debug_register_view(qdio_dbf_slsb_out,&debug_hex_ascii_view);
3768         debug_set_level(qdio_dbf_slsb_out,QDIO_DBF_SLSB_OUT_LEVEL);
3769
3770         qdio_dbf_slsb_in=debug_register(QDIO_DBF_SLSB_IN_NAME,
3771                                         QDIO_DBF_SLSB_IN_PAGES,
3772                                         QDIO_DBF_SLSB_IN_NR_AREAS,
3773                                         QDIO_DBF_SLSB_IN_LEN);
3774         if (!qdio_dbf_slsb_in)
3775                 goto oom;
3776         debug_register_view(qdio_dbf_slsb_in,&debug_hex_ascii_view);
3777         debug_set_level(qdio_dbf_slsb_in,QDIO_DBF_SLSB_IN_LEVEL);
3778 #endif /* CONFIG_QDIO_DEBUG */
3779         return 0;
3780 oom:
3781         QDIO_PRINT_ERR("not enough memory for dbf.\n");
3782         qdio_unregister_dbf_views();
3783         return -ENOMEM;
3784 }
3785
3786 static void *qdio_mempool_alloc(gfp_t gfp_mask, void *size)
3787 {
3788         return (void *) get_zeroed_page(gfp_mask|GFP_DMA);
3789 }
3790
3791 static void qdio_mempool_free(void *element, void *size)
3792 {
3793         free_page((unsigned long) element);
3794 }
3795
3796 static int __init
3797 init_QDIO(void)
3798 {
3799         int res;
3800 #ifdef QDIO_PERFORMANCE_STATS
3801         void *ptr;
3802 #endif /* QDIO_PERFORMANCE_STATS */
3803
3804         printk("qdio: loading %s\n",version);
3805
3806         res=qdio_get_qdio_memory();
3807         if (res)
3808                 return res;
3809
3810         res = qdio_register_dbf_views();
3811         if (res)
3812                 return res;
3813
3814         QDIO_DBF_TEXT0(0,setup,"initQDIO");
3815
3816 #ifdef QDIO_PERFORMANCE_STATS
3817         memset((void*)&perf_stats,0,sizeof(perf_stats));
3818         QDIO_DBF_TEXT0(0,setup,"perfstat");
3819         ptr=&perf_stats;
3820         QDIO_DBF_HEX0(0,setup,&ptr,sizeof(void*));
3821 #endif /* QDIO_PERFORMANCE_STATS */
3822
3823         qdio_add_procfs_entry();
3824
3825         qdio_mempool_scssc = mempool_create(QDIO_MEMPOOL_SCSSC_ELEMENTS,
3826                                             qdio_mempool_alloc,
3827                                             qdio_mempool_free, NULL);
3828
3829         if (tiqdio_check_chsc_availability())
3830                 QDIO_PRINT_ERR("Not all CHSCs supported. Continuing.\n");
3831
3832         tiqdio_register_thinints();
3833
3834         return 0;
3835  }
3836
3837 static void __exit
3838 cleanup_QDIO(void)
3839 {
3840         tiqdio_unregister_thinints();
3841         qdio_remove_procfs_entry();
3842         qdio_release_qdio_memory();
3843         qdio_unregister_dbf_views();
3844         mempool_destroy(qdio_mempool_scssc);
3845
3846         printk("qdio: %s: module removed\n",version);
3847 }
3848
3849 module_init(init_QDIO);
3850 module_exit(cleanup_QDIO);
3851
3852 EXPORT_SYMBOL(qdio_allocate);
3853 EXPORT_SYMBOL(qdio_establish);
3854 EXPORT_SYMBOL(qdio_initialize);
3855 EXPORT_SYMBOL(qdio_activate);
3856 EXPORT_SYMBOL(do_QDIO);
3857 EXPORT_SYMBOL(qdio_shutdown);
3858 EXPORT_SYMBOL(qdio_free);
3859 EXPORT_SYMBOL(qdio_cleanup);
3860 EXPORT_SYMBOL(qdio_synchronize);