err.no Git - linux-2.6/blob - drivers/s390/cio/qdio.c

   1 /*
   2  *
   3  * linux/drivers/s390/cio/qdio.c
   4  *
   5  * Linux for S/390 QDIO base support, Hipersocket base support
   6  * version 2
   7  *
   8  * Copyright 2000,2002 IBM Corporation
   9  * Author(s):             Utz Bacher <utz.bacher@de.ibm.com>
  10  * 2.6 cio integration by Cornelia Huck <cohuck@de.ibm.com>
  11  *
  12  * Restriction: only 63 iqdio subchannels would have its own indicator,
  13  * after that, subsequent subchannels share one indicator
  14  *
  15  *
  16  *
  17  *
  18  * This program is free software; you can redistribute it and/or modify
  19  * it under the terms of the GNU General Public License as published by
  20  * the Free Software Foundation; either version 2, or (at your option)
  21  * any later version.
  22  *
  23  * This program is distributed in the hope that it will be useful,
  24  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  25  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  26  * GNU General Public License for more details.
  27  *
  28  * You should have received a copy of the GNU General Public License
  29  * along with this program; if not, write to the Free Software
  30  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  31  */
  32
  33 #include <linux/config.h>
  34 #include <linux/module.h>
  35 #include <linux/init.h>
  36
  37 #include <linux/slab.h>
  38 #include <linux/kernel.h>
  39 #include <linux/proc_fs.h>
  40 #include <linux/timer.h>
  41
  42 #include <asm/ccwdev.h>
  43 #include <asm/io.h>
  44 #include <asm/atomic.h>
  45 #include <asm/semaphore.h>
  46 #include <asm/timex.h>
  47
  48 #include <asm/debug.h>
  49 #include <asm/qdio.h>
  50
  51 #include "cio.h"
  52 #include "css.h"
  53 #include "device.h"
  54 #include "airq.h"
  55 #include "qdio.h"
  56 #include "ioasm.h"
  57 #include "chsc.h"
  58
  59 #define VERSION_QDIO_C "$Revision: 1.113 $"
  60
  61 /****************** MODULE PARAMETER VARIABLES ********************/
  62 MODULE_AUTHOR("Utz Bacher <utz.bacher@de.ibm.com>");
  63 MODULE_DESCRIPTION("QDIO base support version 2, " \
  64                    "Copyright 2000 IBM Corporation");
  65 MODULE_LICENSE("GPL");
  66
  67 /******************** HERE WE GO ***********************************/
  68
  69 static const char version[] = "QDIO base support version 2 ("
  70         VERSION_QDIO_C "/" VERSION_QDIO_H  "/" VERSION_CIO_QDIO_H ")";
  71
  72 #ifdef QDIO_PERFORMANCE_STATS
  73 static int proc_perf_file_registration;
  74 static unsigned long i_p_c, i_p_nc, o_p_c, o_p_nc, ii_p_c, ii_p_nc;
  75 static struct qdio_perf_stats perf_stats;
  76 #endif /* QDIO_PERFORMANCE_STATS */
  77
  78 static int hydra_thinints;
  79 static int is_passthrough = 0;
  80 static int omit_svs;
  81
  82 static int indicator_used[INDICATORS_PER_CACHELINE];
  83 static __u32 * volatile indicators;
  84 static __u32 volatile spare_indicator;
  85 static atomic_t spare_indicator_usecount;
  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         ccq = do_eqbs(irq->sch_token, state, q_no, start, cnt);
 172         rc = qdio_check_ccq(q, ccq);
 173         if (rc < 0) {
 174                 QDIO_DBF_TEXT2(1,trace,"eqberr");
 175                 sprintf(dbf_text,"%2x,%2x,%d,%d",tmp_cnt, *cnt, ccq, q_no);
 176                 QDIO_DBF_TEXT2(1,trace,dbf_text);
 177                 q->handler(q->cdev,QDIO_STATUS_ACTIVATE_CHECK_CONDITION|
 178                                 QDIO_STATUS_LOOK_FOR_ERROR,
 179                                 0, 0, 0, -1, -1, q->int_parm);
 180                 return 0;
 181         }
 182         return (tmp_cnt - *cnt);
 183 }
 184
 185 /* SQBS: set buffer states */
 186 static inline int
 187 qdio_do_sqbs(struct qdio_q *q, unsigned char state,
 188              unsigned int *start, unsigned int *cnt)
 189 {
 190         struct qdio_irq *irq;
 191         unsigned int tmp_cnt, q_no, ccq;
 192         int rc;
 193         char dbf_text[15];
 194
 195         ccq = 0;
 196         tmp_cnt = *cnt;
 197         irq = (struct qdio_irq*)q->irq_ptr;
 198         q_no = q->q_no;
 199         if(!q->is_input_q)
 200                 q_no += irq->no_input_qs;
 201         ccq = do_sqbs(irq->sch_token, state, q_no, start, cnt);
 202         rc = qdio_check_ccq(q, ccq);
 203         if (rc < 0) {
 204                 QDIO_DBF_TEXT3(1,trace,"sqberr");
 205                 sprintf(dbf_text,"%2x,%2x,%d,%d",tmp_cnt,*cnt,ccq,q_no);
 206                 QDIO_DBF_TEXT3(1,trace,dbf_text);
 207                 q->handler(q->cdev,QDIO_STATUS_ACTIVATE_CHECK_CONDITION|
 208                                 QDIO_STATUS_LOOK_FOR_ERROR,
 209                                 0, 0, 0, -1, -1, q->int_parm);
 210                 return 0;
 211         }
 212         return (tmp_cnt - *cnt);
 213 }
 214
 215 static inline int
 216 qdio_set_slsb(struct qdio_q *q, unsigned int *bufno,
 217               unsigned char state, unsigned int *count)
 218 {
 219         volatile char *slsb;
 220         struct qdio_irq *irq;
 221
 222         irq = (struct qdio_irq*)q->irq_ptr;
 223         if (!irq->is_qebsm) {
 224                 slsb = (char *)&q->slsb.acc.val[(*bufno)];
 225                 xchg(slsb, state);
 226                 return 1;
 227         }
 228         return qdio_do_sqbs(q, state, bufno, count);
 229 }
 230
 231 #ifdef CONFIG_QDIO_DEBUG
 232 static inline void
 233 qdio_trace_slsb(struct qdio_q *q)
 234 {
 235         if (q->queue_type==QDIO_TRACE_QTYPE) {
 236                 if (q->is_input_q)
 237                         QDIO_DBF_HEX2(0,slsb_in,&q->slsb,
 238                                       QDIO_MAX_BUFFERS_PER_Q);
 239                 else
 240                         QDIO_DBF_HEX2(0,slsb_out,&q->slsb,
 241                                       QDIO_MAX_BUFFERS_PER_Q);
 242         }
 243 }
 244 #endif
 245
 246 static inline int
 247 set_slsb(struct qdio_q *q, unsigned int *bufno,
 248          unsigned char state, unsigned int *count)
 249 {
 250         int rc;
 251 #ifdef CONFIG_QDIO_DEBUG
 252         qdio_trace_slsb(q);
 253 #endif
 254         rc = qdio_set_slsb(q, bufno, state, count);
 255 #ifdef CONFIG_QDIO_DEBUG
 256         qdio_trace_slsb(q);
 257 #endif
 258         return rc;
 259 }
 260 static inline int
 261 qdio_siga_sync(struct qdio_q *q, unsigned int gpr2,
 262                unsigned int gpr3)
 263 {
 264         int cc;
 265
 266         QDIO_DBF_TEXT4(0,trace,"sigasync");
 267         QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
 268
 269 #ifdef QDIO_PERFORMANCE_STATS
 270         perf_stats.siga_syncs++;
 271 #endif /* QDIO_PERFORMANCE_STATS */
 272
 273         cc = do_siga_sync(q->schid, gpr2, gpr3);
 274         if (cc)
 275                 QDIO_DBF_HEX3(0,trace,&cc,sizeof(int*));
 276
 277         return cc;
 278 }
 279
 280 static inline int
 281 qdio_siga_sync_q(struct qdio_q *q)
 282 {
 283         if (q->is_input_q)
 284                 return qdio_siga_sync(q, 0, q->mask);
 285         return qdio_siga_sync(q, q->mask, 0);
 286 }
 287
 288 static int
 289 __do_siga_output(struct qdio_q *q, unsigned int *busy_bit)
 290 {
 291        struct qdio_irq *irq;
 292        unsigned int fc = 0;
 293        unsigned long schid;
 294
 295        irq = (struct qdio_irq *) q->irq_ptr;
 296        if (!irq->is_qebsm)
 297                schid = *((u32 *)&q->schid);
 298        else {
 299                schid = irq->sch_token;
 300                fc |= 0x80;
 301        }
 302        return do_siga_output(schid, q->mask, busy_bit, fc);
 303 }
 304
 305 /*
 306  * returns QDIO_SIGA_ERROR_ACCESS_EXCEPTION as cc, when SIGA returns
 307  * an access exception
 308  */
 309 static inline int
 310 qdio_siga_output(struct qdio_q *q)
 311 {
 312         int cc;
 313         __u32 busy_bit;
 314         __u64 start_time=0;
 315
 316 #ifdef QDIO_PERFORMANCE_STATS
 317         perf_stats.siga_outs++;
 318 #endif /* QDIO_PERFORMANCE_STATS */
 319
 320         QDIO_DBF_TEXT4(0,trace,"sigaout");
 321         QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
 322
 323         for (;;) {
 324                 cc = __do_siga_output(q, &busy_bit);
 325 //QDIO_PRINT_ERR("cc=%x, busy=%x\n",cc,busy_bit);
 326                 if ((cc==2) && (busy_bit) && (q->is_iqdio_q)) {
 327                         if (!start_time)
 328                                 start_time=NOW;
 329                         if ((NOW-start_time)>QDIO_BUSY_BIT_PATIENCE)
 330                                 break;
 331                 } else
 332                         break;
 333         }
 334
 335         if ((cc==2) && (busy_bit))
 336                 cc |= QDIO_SIGA_ERROR_B_BIT_SET;
 337
 338         if (cc)
 339                 QDIO_DBF_HEX3(0,trace,&cc,sizeof(int*));
 340
 341         return cc;
 342 }
 343
 344 static inline int
 345 qdio_siga_input(struct qdio_q *q)
 346 {
 347         int cc;
 348
 349         QDIO_DBF_TEXT4(0,trace,"sigain");
 350         QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
 351
 352 #ifdef QDIO_PERFORMANCE_STATS
 353         perf_stats.siga_ins++;
 354 #endif /* QDIO_PERFORMANCE_STATS */
 355
 356         cc = do_siga_input(q->schid, q->mask);
 357
 358         if (cc)
 359                 QDIO_DBF_HEX3(0,trace,&cc,sizeof(int*));
 360
 361         return cc;
 362 }
 363
 364 /* locked by the locks in qdio_activate and qdio_cleanup */
 365 static __u32 *
 366 qdio_get_indicator(void)
 367 {
 368         int i;
 369
 370         for (i=1;i<INDICATORS_PER_CACHELINE;i++)
 371                 if (!indicator_used[i]) {
 372                         indicator_used[i]=1;
 373                         return indicators+i;
 374                 }
 375         atomic_inc(&spare_indicator_usecount);
 376         return (__u32 * volatile) &spare_indicator;
 377 }
 378
 379 /* locked by the locks in qdio_activate and qdio_cleanup */
 380 static void
 381 qdio_put_indicator(__u32 *addr)
 382 {
 383         int i;
 384
 385         if ( (addr) && (addr!=&spare_indicator) ) {
 386                 i=addr-indicators;
 387                 indicator_used[i]=0;
 388         }
 389         if (addr == &spare_indicator)
 390                 atomic_dec(&spare_indicator_usecount);
 391 }
 392
 393 static inline void
 394 tiqdio_clear_summary_bit(__u32 *location)
 395 {
 396         QDIO_DBF_TEXT5(0,trace,"clrsummb");
 397         QDIO_DBF_HEX5(0,trace,&location,sizeof(void*));
 398
 399         xchg(location,0);
 400 }
 401
 402 static inline  void
 403 tiqdio_set_summary_bit(__u32 *location)
 404 {
 405         QDIO_DBF_TEXT5(0,trace,"setsummb");
 406         QDIO_DBF_HEX5(0,trace,&location,sizeof(void*));
 407
 408         xchg(location,-1);
 409 }
 410
 411 static inline void
 412 tiqdio_sched_tl(void)
 413 {
 414         tasklet_hi_schedule(&tiqdio_tasklet);
 415 }
 416
 417 static inline void
 418 qdio_mark_tiq(struct qdio_q *q)
 419 {
 420         unsigned long flags;
 421
 422         QDIO_DBF_TEXT4(0,trace,"mark iq");
 423         QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
 424
 425         spin_lock_irqsave(&ttiq_list_lock,flags);
 426         if (unlikely(atomic_read(&q->is_in_shutdown)))
 427                 goto out_unlock;
 428
 429         if (!q->is_input_q)
 430                 goto out_unlock;
 431
 432         if ((q->list_prev) || (q->list_next))
 433                 goto out_unlock;
 434
 435         if (!tiq_list) {
 436                 tiq_list=q;
 437                 q->list_prev=q;
 438                 q->list_next=q;
 439         } else {
 440                 q->list_next=tiq_list;
 441                 q->list_prev=tiq_list->list_prev;
 442                 tiq_list->list_prev->list_next=q;
 443                 tiq_list->list_prev=q;
 444         }
 445         spin_unlock_irqrestore(&ttiq_list_lock,flags);
 446
 447         tiqdio_set_summary_bit((__u32*)q->dev_st_chg_ind);
 448         tiqdio_sched_tl();
 449         return;
 450 out_unlock:
 451         spin_unlock_irqrestore(&ttiq_list_lock,flags);
 452         return;
 453 }
 454
 455 static inline void
 456 qdio_mark_q(struct qdio_q *q)
 457 {
 458         QDIO_DBF_TEXT4(0,trace,"mark q");
 459         QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
 460
 461         if (unlikely(atomic_read(&q->is_in_shutdown)))
 462                 return;
 463
 464         tasklet_schedule(&q->tasklet);
 465 }
 466
 467 static inline int
 468 qdio_stop_polling(struct qdio_q *q)
 469 {
 470 #ifdef QDIO_USE_PROCESSING_STATE
 471        unsigned int tmp, gsf, count = 1;
 472        unsigned char state = 0;
 473        struct qdio_irq *irq = (struct qdio_irq *) q->irq_ptr;
 474
 475         if (!atomic_swap(&q->polling,0))
 476                 return 1;
 477
 478         QDIO_DBF_TEXT4(0,trace,"stoppoll");
 479         QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
 480
 481         /* show the card that we are not polling anymore */
 482         if (!q->is_input_q)
 483                 return 1;
 484
 485        tmp = gsf = GET_SAVED_FRONTIER(q);
 486        tmp = ((tmp + QDIO_MAX_BUFFERS_PER_Q-1) & (QDIO_MAX_BUFFERS_PER_Q-1) );
 487        set_slsb(q, &tmp, SLSB_P_INPUT_NOT_INIT, &count);
 488
 489         /*
 490          * we don't issue this SYNC_MEMORY, as we trust Rick T and
 491          * moreover will not use the PROCESSING state under VM, so
 492          * q->polling was 0 anyway
 493          */
 494         /*SYNC_MEMORY;*/
 495        if (irq->is_qebsm) {
 496                count = 1;
 497                qdio_do_eqbs(q, &state, &gsf, &count);
 498        } else
 499                state = q->slsb.acc.val[gsf];
 500        if (state != SLSB_P_INPUT_PRIMED)
 501                 return 1;
 502         /*
 503          * set our summary bit again, as otherwise there is a
 504          * small window we can miss between resetting it and
 505          * checking for PRIMED state
 506          */
 507         if (q->is_thinint_q)
 508                 tiqdio_set_summary_bit((__u32*)q->dev_st_chg_ind);
 509         return 0;
 510
 511 #else /* QDIO_USE_PROCESSING_STATE */
 512         return 1;
 513 #endif /* QDIO_USE_PROCESSING_STATE */
 514 }
 515
 516 /*
 517  * see the comment in do_QDIO and before qdio_reserve_q about the
 518  * sophisticated locking outside of unmark_q, so that we don't need to
 519  * disable the interrupts :-)
 520 */
 521 static inline void
 522 qdio_unmark_q(struct qdio_q *q)
 523 {
 524         unsigned long flags;
 525
 526         QDIO_DBF_TEXT4(0,trace,"unmark q");
 527         QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
 528
 529         if ((!q->list_prev)||(!q->list_next))
 530                 return;
 531
 532         if ((q->is_thinint_q)&&(q->is_input_q)) {
 533                 /* iQDIO */
 534                 spin_lock_irqsave(&ttiq_list_lock,flags);
 535                 /* in case cleanup has done this already and simultanously
 536                  * qdio_unmark_q is called from the interrupt handler, we've
 537                  * got to check this in this specific case again */
 538                 if ((!q->list_prev)||(!q->list_next))
 539                         goto out;
 540                 if (q->list_next==q) {
 541                         /* q was the only interesting q */
 542                         tiq_list=NULL;
 543                         q->list_next=NULL;
 544                         q->list_prev=NULL;
 545                 } else {
 546                         q->list_next->list_prev=q->list_prev;
 547                         q->list_prev->list_next=q->list_next;
 548                         tiq_list=q->list_next;
 549                         q->list_next=NULL;
 550                         q->list_prev=NULL;
 551                 }
 552 out:
 553                 spin_unlock_irqrestore(&ttiq_list_lock,flags);
 554         }
 555 }
 556
 557 static inline unsigned long
 558 tiqdio_clear_global_summary(void)
 559 {
 560         unsigned long time;
 561
 562         QDIO_DBF_TEXT5(0,trace,"clrglobl");
 563
 564         time = do_clear_global_summary();
 565
 566         QDIO_DBF_HEX5(0,trace,&time,sizeof(unsigned long));
 567
 568         return time;
 569 }
 570
 571
 572 /************************* OUTBOUND ROUTINES *******************************/
 573 static int
 574 qdio_qebsm_get_outbound_buffer_frontier(struct qdio_q *q)
 575 {
 576         struct qdio_irq *irq;
 577         unsigned char state;
 578         unsigned int cnt, count, ftc;
 579
 580         irq = (struct qdio_irq *) q->irq_ptr;
 581         if ((!q->is_iqdio_q) && (!q->hydra_gives_outbound_pcis))
 582                 SYNC_MEMORY;
 583
 584         ftc = q->first_to_check;
 585         count = qdio_min(atomic_read(&q->number_of_buffers_used),
 586                         (QDIO_MAX_BUFFERS_PER_Q-1));
 587         if (count == 0)
 588                 return q->first_to_check;
 589         cnt = qdio_do_eqbs(q, &state, &ftc, &count);
 590         if (cnt == 0)
 591                 return q->first_to_check;
 592         switch (state) {
 593         case SLSB_P_OUTPUT_ERROR:
 594                 QDIO_DBF_TEXT3(0,trace,"outperr");
 595                 atomic_sub(cnt , &q->number_of_buffers_used);
 596                 if (q->qdio_error)
 597                         q->error_status_flags |=
 598                                 QDIO_STATUS_MORE_THAN_ONE_QDIO_ERROR;
 599                 q->qdio_error = SLSB_P_OUTPUT_ERROR;
 600                 q->error_status_flags |= QDIO_STATUS_LOOK_FOR_ERROR;
 601                 q->first_to_check = ftc;
 602                 break;
 603         case SLSB_P_OUTPUT_EMPTY:
 604                 QDIO_DBF_TEXT5(0,trace,"outpempt");
 605                 atomic_sub(cnt, &q->number_of_buffers_used);
 606                 q->first_to_check = ftc;
 607                 break;
 608         case SLSB_CU_OUTPUT_PRIMED:
 609                 /* all buffers primed */
 610                 QDIO_DBF_TEXT5(0,trace,"outpprim");
 611                 break;
 612         default:
 613                 break;
 614         }
 615         QDIO_DBF_HEX4(0,trace,&q->first_to_check,sizeof(int));
 616         return q->first_to_check;
 617 }
 618
 619 static int
 620 qdio_qebsm_get_inbound_buffer_frontier(struct qdio_q *q)
 621 {
 622         struct qdio_irq *irq;
 623         unsigned char state;
 624         int tmp, ftc, count, cnt;
 625         char dbf_text[15];
 626
 627
 628         irq = (struct qdio_irq *) q->irq_ptr;
 629         ftc = q->first_to_check;
 630         count = qdio_min(atomic_read(&q->number_of_buffers_used),
 631                         (QDIO_MAX_BUFFERS_PER_Q-1));
 632         if (count == 0)
 633                  return q->first_to_check;
 634         cnt = qdio_do_eqbs(q, &state, &ftc, &count);
 635         if (cnt == 0)
 636                  return q->first_to_check;
 637         switch (state) {
 638         case SLSB_P_INPUT_ERROR :
 639 #ifdef CONFIG_QDIO_DEBUG
 640                 QDIO_DBF_TEXT3(1,trace,"inperr");
 641                 sprintf(dbf_text,"%2x,%2x",ftc,count);
 642                 QDIO_DBF_TEXT3(1,trace,dbf_text);
 643 #endif /* CONFIG_QDIO_DEBUG */
 644                 if (q->qdio_error)
 645                         q->error_status_flags |=
 646                                 QDIO_STATUS_MORE_THAN_ONE_QDIO_ERROR;
 647                 q->qdio_error = SLSB_P_INPUT_ERROR;
 648                 q->error_status_flags |= QDIO_STATUS_LOOK_FOR_ERROR;
 649                 atomic_sub(cnt, &q->number_of_buffers_used);
 650                 q->first_to_check = ftc;
 651                 break;
 652         case SLSB_P_INPUT_PRIMED :
 653                 QDIO_DBF_TEXT3(0,trace,"inptprim");
 654                 sprintf(dbf_text,"%2x,%2x",ftc,count);
 655                 QDIO_DBF_TEXT3(1,trace,dbf_text);
 656                 tmp = 0;
 657                 ftc = q->first_to_check;
 658 #ifdef QDIO_USE_PROCESSING_STATE
 659                 if (cnt > 1) {
 660                         cnt -= 1;
 661                         tmp = set_slsb(q, &ftc, SLSB_P_INPUT_NOT_INIT, &cnt);
 662                         if (!tmp)
 663                                 break;
 664                 }
 665                 cnt = 1;
 666                 tmp += set_slsb(q, &ftc,
 667                                SLSB_P_INPUT_PROCESSING, &cnt);
 668                 atomic_set(&q->polling, 1);
 669 #else
 670                 tmp = set_slsb(q, &ftc, SLSB_P_INPUT_NOT_INIT, &cnt);
 671 #endif
 672                 atomic_sub(tmp, &q->number_of_buffers_used);
 673                 q->first_to_check = ftc;
 674                 break;
 675         case SLSB_CU_INPUT_EMPTY:
 676         case SLSB_P_INPUT_NOT_INIT:
 677         case SLSB_P_INPUT_PROCESSING:
 678                 QDIO_DBF_TEXT5(0,trace,"inpnipro");
 679                 break;
 680         default:
 681                 break;
 682         }
 683         QDIO_DBF_HEX4(0,trace,&q->first_to_check,sizeof(int));
 684         return q->first_to_check;
 685 }
 686
 687 static inline int
 688 qdio_get_outbound_buffer_frontier(struct qdio_q *q)
 689 {
 690         struct qdio_irq *irq;
 691         volatile char *slsb;
 692         unsigned int count = 1;
 693         int first_not_to_check, f, f_mod_no;
 694         char dbf_text[15];
 695
 696         QDIO_DBF_TEXT4(0,trace,"getobfro");
 697         QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
 698
 699         irq = (struct qdio_irq *) q->irq_ptr;
 700         if (irq->is_qebsm)
 701                 return qdio_qebsm_get_outbound_buffer_frontier(q);
 702
 703         slsb=&q->slsb.acc.val[0];
 704         f_mod_no=f=q->first_to_check;
 705         /*
 706          * f points to already processed elements, so f+no_used is correct...
 707          * ... but: we don't check 128 buffers, as otherwise
 708          * qdio_has_outbound_q_moved would return 0
 709          */
 710         first_not_to_check=f+qdio_min(atomic_read(&q->number_of_buffers_used),
 711                                       (QDIO_MAX_BUFFERS_PER_Q-1));
 712
 713         if ((!q->is_iqdio_q)&&(!q->hydra_gives_outbound_pcis))
 714                 SYNC_MEMORY;
 715
 716 check_next:
 717         if (f==first_not_to_check)
 718                 goto out;
 719
 720         switch(slsb[f_mod_no]) {
 721
 722         /* the adapter has not fetched the output yet */
 723         case SLSB_CU_OUTPUT_PRIMED:
 724                 QDIO_DBF_TEXT5(0,trace,"outpprim");
 725                 break;
 726
 727         /* the adapter got it */
 728         case SLSB_P_OUTPUT_EMPTY:
 729                 atomic_dec(&q->number_of_buffers_used);
 730                 f++;
 731                 f_mod_no=f&(QDIO_MAX_BUFFERS_PER_Q-1);
 732                 QDIO_DBF_TEXT5(0,trace,"outpempt");
 733                 goto check_next;
 734
 735         case SLSB_P_OUTPUT_ERROR:
 736                 QDIO_DBF_TEXT3(0,trace,"outperr");
 737                 sprintf(dbf_text,"%x-%x-%x",f_mod_no,
 738                         q->sbal[f_mod_no]->element[14].sbalf.value,
 739                         q->sbal[f_mod_no]->element[15].sbalf.value);
 740                 QDIO_DBF_TEXT3(1,trace,dbf_text);
 741                 QDIO_DBF_HEX2(1,sbal,q->sbal[f_mod_no],256);
 742
 743                 /* kind of process the buffer */
 744                 set_slsb(q, &f_mod_no, SLSB_P_OUTPUT_NOT_INIT, &count);
 745
 746                 /*
 747                  * we increment the frontier, as this buffer
 748                  * was processed obviously
 749                  */
 750                 atomic_dec(&q->number_of_buffers_used);
 751                 f_mod_no=(f_mod_no+1)&(QDIO_MAX_BUFFERS_PER_Q-1);
 752
 753                 if (q->qdio_error)
 754                         q->error_status_flags|=
 755                                 QDIO_STATUS_MORE_THAN_ONE_QDIO_ERROR;
 756                 q->qdio_error=SLSB_P_OUTPUT_ERROR;
 757                 q->error_status_flags|=QDIO_STATUS_LOOK_FOR_ERROR;
 758
 759                 break;
 760
 761         /* no new buffers */
 762         default:
 763                 QDIO_DBF_TEXT5(0,trace,"outpni");
 764         }
 765 out:
 766         return (q->first_to_check=f_mod_no);
 767 }
 768
 769 /* all buffers are processed */
 770 static inline int
 771 qdio_is_outbound_q_done(struct qdio_q *q)
 772 {
 773         int no_used;
 774 #ifdef CONFIG_QDIO_DEBUG
 775         char dbf_text[15];
 776 #endif
 777
 778         no_used=atomic_read(&q->number_of_buffers_used);
 779
 780 #ifdef CONFIG_QDIO_DEBUG
 781         if (no_used) {
 782                 sprintf(dbf_text,"oqisnt%02x",no_used);
 783                 QDIO_DBF_TEXT4(0,trace,dbf_text);
 784         } else {
 785                 QDIO_DBF_TEXT4(0,trace,"oqisdone");
 786         }
 787         QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
 788 #endif /* CONFIG_QDIO_DEBUG */
 789         return (no_used==0);
 790 }
 791
 792 static inline int
 793 qdio_has_outbound_q_moved(struct qdio_q *q)
 794 {
 795         int i;
 796
 797         i=qdio_get_outbound_buffer_frontier(q);
 798
 799         if ( (i!=GET_SAVED_FRONTIER(q)) ||
 800              (q->error_status_flags&QDIO_STATUS_LOOK_FOR_ERROR) ) {
 801                 SAVE_FRONTIER(q,i);
 802                 QDIO_DBF_TEXT4(0,trace,"oqhasmvd");
 803                 QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
 804                 return 1;
 805         } else {
 806                 QDIO_DBF_TEXT4(0,trace,"oqhsntmv");
 807                 QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
 808                 return 0;
 809         }
 810 }
 811
 812 static inline void
 813 qdio_kick_outbound_q(struct qdio_q *q)
 814 {
 815         int result;
 816 #ifdef CONFIG_QDIO_DEBUG
 817         char dbf_text[15];
 818
 819         QDIO_DBF_TEXT4(0,trace,"kickoutq");
 820         QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
 821 #endif /* CONFIG_QDIO_DEBUG */
 822
 823         if (!q->siga_out)
 824                 return;
 825
 826         /* here's the story with cc=2 and busy bit set (thanks, Rick):
 827          * VM's CP could present us cc=2 and busy bit set on SIGA-write
 828          * during reconfiguration of their Guest LAN (only in HIPERS mode,
 829          * QDIO mode is asynchronous -- cc=2 and busy bit there will take
 830          * the queues down immediately; and not being under VM we have a
 831          * problem on cc=2 and busy bit set right away).
 832          *
 833          * Therefore qdio_siga_output will try for a short time constantly,
 834          * if such a condition occurs. If it doesn't change, it will
 835          * increase the busy_siga_counter and save the timestamp, and
 836          * schedule the queue for later processing (via mark_q, using the
 837          * queue tasklet). __qdio_outbound_processing will check out the
 838          * counter. If non-zero, it will call qdio_kick_outbound_q as often
 839          * as the value of the counter. This will attempt further SIGA
 840          * instructions. For each successful SIGA, the counter is
 841          * decreased, for failing SIGAs the counter remains the same, after
 842          * all.
 843          * After some time of no movement, qdio_kick_outbound_q will
 844          * finally fail and reflect corresponding error codes to call
 845          * the upper layer module and have it take the queues down.
 846          *
 847          * Note that this is a change from the original HiperSockets design
 848          * (saying cc=2 and busy bit means take the queues down), but in
 849          * these days Guest LAN didn't exist... excessive cc=2 with busy bit
 850          * conditions will still take the queues down, but the threshold is
 851          * higher due to the Guest LAN environment.
 852          */
 853
 854
 855         result=qdio_siga_output(q);
 856
 857         switch (result) {
 858         case 0:
 859                 /* went smooth this time, reset timestamp */
 860 #ifdef CONFIG_QDIO_DEBUG
 861                 QDIO_DBF_TEXT3(0,trace,"cc2reslv");
 862                 sprintf(dbf_text,"%4x%2x%2x",q->schid.sch_no,q->q_no,
 863                         atomic_read(&q->busy_siga_counter));
 864                 QDIO_DBF_TEXT3(0,trace,dbf_text);
 865 #endif /* CONFIG_QDIO_DEBUG */
 866                 q->timing.busy_start=0;
 867                 break;
 868         case (2|QDIO_SIGA_ERROR_B_BIT_SET):
 869                 /* cc=2 and busy bit: */
 870                 atomic_inc(&q->busy_siga_counter);
 871
 872                 /* if the last siga was successful, save
 873                  * timestamp here */
 874                 if (!q->timing.busy_start)
 875                         q->timing.busy_start=NOW;
 876
 877                 /* if we're in time, don't touch error_status_flags
 878                  * and siga_error */
 879                 if (NOW-q->timing.busy_start<QDIO_BUSY_BIT_GIVE_UP) {
 880                         qdio_mark_q(q);
 881                         break;
 882                 }
 883                 QDIO_DBF_TEXT2(0,trace,"cc2REPRT");
 884 #ifdef CONFIG_QDIO_DEBUG
 885                 sprintf(dbf_text,"%4x%2x%2x",q->schid.sch_no,q->q_no,
 886                         atomic_read(&q->busy_siga_counter));
 887                 QDIO_DBF_TEXT3(0,trace,dbf_text);
 888 #endif /* CONFIG_QDIO_DEBUG */
 889                 /* else fallthrough and report error */
 890         default:
 891                 /* for plain cc=1, 2 or 3: */
 892                 if (q->siga_error)
 893                         q->error_status_flags|=
 894                                 QDIO_STATUS_MORE_THAN_ONE_SIGA_ERROR;
 895                 q->error_status_flags|=
 896                         QDIO_STATUS_LOOK_FOR_ERROR;
 897                 q->siga_error=result;
 898         }
 899 }
 900
 901 static inline void
 902 qdio_kick_outbound_handler(struct qdio_q *q)
 903 {
 904         int start, end, real_end, count;
 905 #ifdef CONFIG_QDIO_DEBUG
 906         char dbf_text[15];
 907 #endif
 908
 909         start = q->first_element_to_kick;
 910         /* last_move_ftc was just updated */
 911         real_end = GET_SAVED_FRONTIER(q);
 912         end = (real_end+QDIO_MAX_BUFFERS_PER_Q-1)&
 913                 (QDIO_MAX_BUFFERS_PER_Q-1);
 914         count = (end+QDIO_MAX_BUFFERS_PER_Q+1-start)&
 915                 (QDIO_MAX_BUFFERS_PER_Q-1);
 916
 917 #ifdef CONFIG_QDIO_DEBUG
 918         QDIO_DBF_TEXT4(0,trace,"kickouth");
 919         QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
 920
 921         sprintf(dbf_text,"s=%2xc=%2x",start,count);
 922         QDIO_DBF_TEXT4(0,trace,dbf_text);
 923 #endif /* CONFIG_QDIO_DEBUG */
 924
 925         if (q->state==QDIO_IRQ_STATE_ACTIVE)
 926                 q->handler(q->cdev,QDIO_STATUS_OUTBOUND_INT|
 927                            q->error_status_flags,
 928                            q->qdio_error,q->siga_error,q->q_no,start,count,
 929                            q->int_parm);
 930
 931         /* for the next time: */
 932         q->first_element_to_kick=real_end;
 933         q->qdio_error=0;
 934         q->siga_error=0;
 935         q->error_status_flags=0;
 936 }
 937
 938 static inline void
 939 __qdio_outbound_processing(struct qdio_q *q)
 940 {
 941         int siga_attempts;
 942
 943         QDIO_DBF_TEXT4(0,trace,"qoutproc");
 944         QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
 945
 946         if (unlikely(qdio_reserve_q(q))) {
 947                 qdio_release_q(q);
 948 #ifdef QDIO_PERFORMANCE_STATS
 949                 o_p_c++;
 950 #endif /* QDIO_PERFORMANCE_STATS */
 951                 /* as we're sissies, we'll check next time */
 952                 if (likely(!atomic_read(&q->is_in_shutdown))) {
 953                         qdio_mark_q(q);
 954                         QDIO_DBF_TEXT4(0,trace,"busy,agn");
 955                 }
 956                 return;
 957         }
 958 #ifdef QDIO_PERFORMANCE_STATS
 959         o_p_nc++;
 960         perf_stats.tl_runs++;
 961 #endif /* QDIO_PERFORMANCE_STATS */
 962
 963         /* see comment in qdio_kick_outbound_q */
 964         siga_attempts=atomic_read(&q->busy_siga_counter);
 965         while (siga_attempts) {
 966                 atomic_dec(&q->busy_siga_counter);
 967                 qdio_kick_outbound_q(q);
 968                 siga_attempts--;
 969         }
 970
 971         if (qdio_has_outbound_q_moved(q))
 972                 qdio_kick_outbound_handler(q);
 973
 974         if (q->is_iqdio_q) {
 975                 /*
 976                  * for asynchronous queues, we better check, if the fill
 977                  * level is too high. for synchronous queues, the fill
 978                  * level will never be that high.
 979                  */
 980                 if (atomic_read(&q->number_of_buffers_used)>
 981                     IQDIO_FILL_LEVEL_TO_POLL)
 982                         qdio_mark_q(q);
 983
 984         } else if (!q->hydra_gives_outbound_pcis)
 985                 if (!qdio_is_outbound_q_done(q))
 986                         qdio_mark_q(q);
 987
 988         qdio_release_q(q);
 989 }
 990
 991 static void
 992 qdio_outbound_processing(struct qdio_q *q)
 993 {
 994         __qdio_outbound_processing(q);
 995 }
 996
 997 /************************* INBOUND ROUTINES *******************************/
 998
 999
1000 static inline int
1001 qdio_get_inbound_buffer_frontier(struct qdio_q *q)
1002 {
1003         struct qdio_irq *irq;
1004         int f,f_mod_no;
1005         volatile char *slsb;
1006         unsigned int count = 1;
1007         int first_not_to_check;
1008 #ifdef CONFIG_QDIO_DEBUG
1009         char dbf_text[15];
1010 #endif /* CONFIG_QDIO_DEBUG */
1011 #ifdef QDIO_USE_PROCESSING_STATE
1012         int last_position=-1;
1013 #endif /* QDIO_USE_PROCESSING_STATE */
1014
1015         QDIO_DBF_TEXT4(0,trace,"getibfro");
1016         QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
1017
1018         irq = (struct qdio_irq *) q->irq_ptr;
1019         if (irq->is_qebsm)
1020                 return qdio_qebsm_get_inbound_buffer_frontier(q);
1021
1022         slsb=&q->slsb.acc.val[0];
1023         f_mod_no=f=q->first_to_check;
1024         /*
1025          * we don't check 128 buffers, as otherwise qdio_has_inbound_q_moved
1026          * would return 0
1027          */
1028         first_not_to_check=f+qdio_min(atomic_read(&q->number_of_buffers_used),
1029                                       (QDIO_MAX_BUFFERS_PER_Q-1));
1030
1031         /*
1032          * we don't use this one, as a PCI or we after a thin interrupt
1033          * will sync the queues
1034          */
1035         /* SYNC_MEMORY;*/
1036
1037 check_next:
1038         f_mod_no=f&(QDIO_MAX_BUFFERS_PER_Q-1);
1039         if (f==first_not_to_check)
1040                 goto out;
1041         switch (slsb[f_mod_no]) {
1042
1043         /* CU_EMPTY means frontier is reached */
1044         case SLSB_CU_INPUT_EMPTY:
1045                 QDIO_DBF_TEXT5(0,trace,"inptempt");
1046                 break;
1047
1048         /* P_PRIMED means set slsb to P_PROCESSING and move on */
1049         case SLSB_P_INPUT_PRIMED:
1050                 QDIO_DBF_TEXT5(0,trace,"inptprim");
1051
1052 #ifdef QDIO_USE_PROCESSING_STATE
1053                 /*
1054                  * as soon as running under VM, polling the input queues will
1055                  * kill VM in terms of CP overhead
1056                  */
1057                 if (q->siga_sync) {
1058                         set_slsb(q, &f_mod_no, SLSB_P_INPUT_NOT_INIT, &count);
1059                 } else {
1060                         /* set the previous buffer to NOT_INIT. The current
1061                          * buffer will be set to PROCESSING at the end of
1062                          * this function to avoid further interrupts. */
1063                         if (last_position>=0)
1064                                 set_slsb(q, &last_position,
1065                                          SLSB_P_INPUT_NOT_INIT, &count);
1066                         atomic_set(&q->polling,1);
1067                         last_position=f_mod_no;
1068                 }
1069 #else /* QDIO_USE_PROCESSING_STATE */
1070                 set_slsb(q, &f_mod_no, SLSB_P_INPUT_NOT_INIT, &count);
1071 #endif /* QDIO_USE_PROCESSING_STATE */
1072                 /*
1073                  * not needed, as the inbound queue will be synced on the next
1074                  * siga-r, resp. tiqdio_is_inbound_q_done will do the siga-s
1075                  */
1076                 /*SYNC_MEMORY;*/
1077                 f++;
1078                 atomic_dec(&q->number_of_buffers_used);
1079                 goto check_next;
1080
1081         case SLSB_P_INPUT_NOT_INIT:
1082         case SLSB_P_INPUT_PROCESSING:
1083                 QDIO_DBF_TEXT5(0,trace,"inpnipro");
1084                 break;
1085
1086         /* P_ERROR means frontier is reached, break and report error */
1087         case SLSB_P_INPUT_ERROR:
1088 #ifdef CONFIG_QDIO_DEBUG
1089                 sprintf(dbf_text,"inperr%2x",f_mod_no);
1090                 QDIO_DBF_TEXT3(1,trace,dbf_text);
1091 #endif /* CONFIG_QDIO_DEBUG */
1092                 QDIO_DBF_HEX2(1,sbal,q->sbal[f_mod_no],256);
1093
1094                 /* kind of process the buffer */
1095                 set_slsb(q, &f_mod_no, SLSB_P_INPUT_NOT_INIT, &count);
1096
1097                 if (q->qdio_error)
1098                         q->error_status_flags|=
1099                                 QDIO_STATUS_MORE_THAN_ONE_QDIO_ERROR;
1100                 q->qdio_error=SLSB_P_INPUT_ERROR;
1101                 q->error_status_flags|=QDIO_STATUS_LOOK_FOR_ERROR;
1102
1103                 /* we increment the frontier, as this buffer
1104                  * was processed obviously */
1105                 f_mod_no=(f_mod_no+1)&(QDIO_MAX_BUFFERS_PER_Q-1);
1106                 atomic_dec(&q->number_of_buffers_used);
1107
1108 #ifdef QDIO_USE_PROCESSING_STATE
1109                 last_position=-1;
1110 #endif /* QDIO_USE_PROCESSING_STATE */
1111
1112                 break;
1113
1114         /* everything else means frontier not changed (HALTED or so) */
1115         default:
1116                 break;
1117         }
1118 out:
1119         q->first_to_check=f_mod_no;
1120
1121 #ifdef QDIO_USE_PROCESSING_STATE
1122         if (last_position>=0)
1123                 set_slsb(q, &last_position, SLSB_P_INPUT_NOT_INIT, &count);
1124 #endif /* QDIO_USE_PROCESSING_STATE */
1125
1126         QDIO_DBF_HEX4(0,trace,&q->first_to_check,sizeof(int));
1127
1128         return q->first_to_check;
1129 }
1130
1131 static inline int
1132 qdio_has_inbound_q_moved(struct qdio_q *q)
1133 {
1134         int i;
1135
1136 #ifdef QDIO_PERFORMANCE_STATS
1137         static int old_pcis=0;
1138         static int old_thinints=0;
1139
1140         if ((old_pcis==perf_stats.pcis)&&(old_thinints==perf_stats.thinints))
1141                 perf_stats.start_time_inbound=NOW;
1142         else
1143                 old_pcis=perf_stats.pcis;
1144 #endif /* QDIO_PERFORMANCE_STATS */
1145
1146         i=qdio_get_inbound_buffer_frontier(q);
1147         if ( (i!=GET_SAVED_FRONTIER(q)) ||
1148              (q->error_status_flags&QDIO_STATUS_LOOK_FOR_ERROR) ) {
1149                 SAVE_FRONTIER(q,i);
1150                 if ((!q->siga_sync)&&(!q->hydra_gives_outbound_pcis))
1151                         SAVE_TIMESTAMP(q);
1152
1153                 QDIO_DBF_TEXT4(0,trace,"inhasmvd");
1154                 QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
1155                 return 1;
1156         } else {
1157                 QDIO_DBF_TEXT4(0,trace,"inhsntmv");
1158                 QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
1159                 return 0;
1160         }
1161 }
1162
1163 /* means, no more buffers to be filled */
1164 static inline int
1165 tiqdio_is_inbound_q_done(struct qdio_q *q)
1166 {
1167         int no_used;
1168         unsigned int start_buf, count;
1169         unsigned char state = 0;
1170         struct qdio_irq *irq = (struct qdio_irq *) q->irq_ptr;
1171
1172 #ifdef CONFIG_QDIO_DEBUG
1173         char dbf_text[15];
1174 #endif
1175
1176         no_used=atomic_read(&q->number_of_buffers_used);
1177
1178         /* propagate the change from 82 to 80 through VM */
1179         SYNC_MEMORY;
1180
1181 #ifdef CONFIG_QDIO_DEBUG
1182         if (no_used) {
1183                 sprintf(dbf_text,"iqisnt%02x",no_used);
1184                 QDIO_DBF_TEXT4(0,trace,dbf_text);
1185         } else {
1186                 QDIO_DBF_TEXT4(0,trace,"iniqisdo");
1187         }
1188         QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
1189 #endif /* CONFIG_QDIO_DEBUG */
1190
1191         if (!no_used)
1192                 return 1;
1193
1194         if (!q->siga_sync)
1195                 /* we'll check for more primed buffers in qeth_stop_polling */
1196                 return 0;
1197         if (irq->is_qebsm) {
1198                 count = 1;
1199                 start_buf = q->first_to_check;
1200                 qdio_do_eqbs(q, &state, &start_buf, &count);
1201         } else
1202                 state = q->slsb.acc.val[q->first_to_check];
1203         if (state != SLSB_P_INPUT_PRIMED)
1204                 /*
1205                  * nothing more to do, if next buffer is not PRIMED.
1206                  * note that we did a SYNC_MEMORY before, that there
1207                  * has been a sychnronization.
1208                  * we will return 0 below, as there is nothing to do
1209                  * (stop_polling not necessary, as we have not been
1210                  * using the PROCESSING state
1211                  */
1212                 return 0;
1213
1214         /*
1215          * ok, the next input buffer is primed. that means, that device state
1216          * change indicator and adapter local summary are set, so we will find
1217          * it next time.
1218          * we will return 0 below, as there is nothing to do, except scheduling
1219          * ourselves for the next time.
1220          */
1221         tiqdio_set_summary_bit((__u32*)q->dev_st_chg_ind);
1222         tiqdio_sched_tl();
1223         return 0;
1224 }
1225
1226 static inline int
1227 qdio_is_inbound_q_done(struct qdio_q *q)
1228 {
1229         int no_used;
1230         unsigned int start_buf, count;
1231         unsigned char state = 0;
1232         struct qdio_irq *irq = (struct qdio_irq *) q->irq_ptr;
1233
1234 #ifdef CONFIG_QDIO_DEBUG
1235         char dbf_text[15];
1236 #endif
1237
1238         no_used=atomic_read(&q->number_of_buffers_used);
1239
1240         /*
1241          * we need that one for synchronization with the adapter, as it
1242          * does a kind of PCI avoidance
1243          */
1244         SYNC_MEMORY;
1245
1246         if (!no_used) {
1247                 QDIO_DBF_TEXT4(0,trace,"inqisdnA");
1248                 QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
1249                 QDIO_DBF_TEXT4(0,trace,dbf_text);
1250                 return 1;
1251         }
1252         if (irq->is_qebsm) {
1253                 count = 1;
1254                 start_buf = q->first_to_check;
1255                 qdio_do_eqbs(q, &state, &start_buf, &count);
1256         } else
1257                 state = q->slsb.acc.val[q->first_to_check];
1258         if (state == SLSB_P_INPUT_PRIMED) {
1259                 /* we got something to do */
1260                 QDIO_DBF_TEXT4(0,trace,"inqisntA");
1261                 QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
1262                 return 0;
1263         }
1264
1265         /* on VM, we don't poll, so the q is always done here */
1266         if (q->siga_sync)
1267                 return 1;
1268         if (q->hydra_gives_outbound_pcis)
1269                 return 1;
1270
1271         /*
1272          * at this point we know, that inbound first_to_check
1273          * has (probably) not moved (see qdio_inbound_processing)
1274          */
1275         if (NOW>GET_SAVED_TIMESTAMP(q)+q->timing.threshold) {
1276 #ifdef CONFIG_QDIO_DEBUG
1277                 QDIO_DBF_TEXT4(0,trace,"inqisdon");
1278                 QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
1279                 sprintf(dbf_text,"pf%02xcn%02x",q->first_to_check,no_used);
1280                 QDIO_DBF_TEXT4(0,trace,dbf_text);
1281 #endif /* CONFIG_QDIO_DEBUG */
1282                 return 1;
1283         } else {
1284 #ifdef CONFIG_QDIO_DEBUG
1285                 QDIO_DBF_TEXT4(0,trace,"inqisntd");
1286                 QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
1287                 sprintf(dbf_text,"pf%02xcn%02x",q->first_to_check,no_used);
1288                 QDIO_DBF_TEXT4(0,trace,dbf_text);
1289 #endif /* CONFIG_QDIO_DEBUG */
1290                 return 0;
1291         }
1292 }
1293
1294 static inline void
1295 qdio_kick_inbound_handler(struct qdio_q *q)
1296 {
1297         int count, start, end, real_end, i;
1298 #ifdef CONFIG_QDIO_DEBUG
1299         char dbf_text[15];
1300 #endif
1301
1302         QDIO_DBF_TEXT4(0,trace,"kickinh");
1303         QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
1304
1305         start=q->first_element_to_kick;
1306         real_end=q->first_to_check;
1307         end=(real_end+QDIO_MAX_BUFFERS_PER_Q-1)&(QDIO_MAX_BUFFERS_PER_Q-1);
1308
1309         i=start;
1310         count=0;
1311         while (1) {
1312                 count++;
1313                 if (i==end)
1314                         break;
1315                 i=(i+1)&(QDIO_MAX_BUFFERS_PER_Q-1);
1316         }
1317
1318 #ifdef CONFIG_QDIO_DEBUG
1319         sprintf(dbf_text,"s=%2xc=%2x",start,count);
1320         QDIO_DBF_TEXT4(0,trace,dbf_text);
1321 #endif /* CONFIG_QDIO_DEBUG */
1322
1323         if (likely(q->state==QDIO_IRQ_STATE_ACTIVE))
1324                 q->handler(q->cdev,
1325                            QDIO_STATUS_INBOUND_INT|q->error_status_flags,
1326                            q->qdio_error,q->siga_error,q->q_no,start,count,
1327                            q->int_parm);
1328
1329         /* for the next time: */
1330         q->first_element_to_kick=real_end;
1331         q->qdio_error=0;
1332         q->siga_error=0;
1333         q->error_status_flags=0;
1334
1335 #ifdef QDIO_PERFORMANCE_STATS
1336         perf_stats.inbound_time+=NOW-perf_stats.start_time_inbound;
1337         perf_stats.inbound_cnt++;
1338 #endif /* QDIO_PERFORMANCE_STATS */
1339 }
1340
1341 static inline void
1342 __tiqdio_inbound_processing(struct qdio_q *q, int spare_ind_was_set)
1343 {
1344         struct qdio_irq *irq_ptr;
1345         struct qdio_q *oq;
1346         int i;
1347
1348         QDIO_DBF_TEXT4(0,trace,"iqinproc");
1349         QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
1350
1351         /*
1352          * we first want to reserve the q, so that we know, that we don't
1353          * interrupt ourselves and call qdio_unmark_q, as is_in_shutdown might
1354          * be set
1355          */
1356         if (unlikely(qdio_reserve_q(q))) {
1357                 qdio_release_q(q);
1358 #ifdef QDIO_PERFORMANCE_STATS
1359                 ii_p_c++;
1360 #endif /* QDIO_PERFORMANCE_STATS */
1361                 /*
1362                  * as we might just be about to stop polling, we make
1363                  * sure that we check again at least once more
1364                  */
1365                 tiqdio_sched_tl();
1366                 return;
1367         }
1368 #ifdef QDIO_PERFORMANCE_STATS
1369         ii_p_nc++;
1370 #endif /* QDIO_PERFORMANCE_STATS */
1371         if (unlikely(atomic_read(&q->is_in_shutdown))) {
1372                 qdio_unmark_q(q);
1373                 goto out;
1374         }
1375
1376         /*
1377          * we reset spare_ind_was_set, when the queue does not use the
1378          * spare indicator
1379          */
1380         if (spare_ind_was_set)
1381                 spare_ind_was_set = (q->dev_st_chg_ind == &spare_indicator);
1382
1383         if (!(*(q->dev_st_chg_ind)) && !spare_ind_was_set)
1384                 goto out;
1385         /*
1386          * q->dev_st_chg_ind is the indicator, be it shared or not.
1387          * only clear it, if indicator is non-shared
1388          */
1389         if (!spare_ind_was_set)
1390                 tiqdio_clear_summary_bit((__u32*)q->dev_st_chg_ind);
1391
1392         if (q->hydra_gives_outbound_pcis) {
1393                 if (!q->siga_sync_done_on_thinints) {
1394                         SYNC_MEMORY_ALL;
1395                 } else if ((!q->siga_sync_done_on_outb_tis)&&
1396                          (q->hydra_gives_outbound_pcis)) {
1397                         SYNC_MEMORY_ALL_OUTB;
1398                 }
1399         } else {
1400                 SYNC_MEMORY;
1401         }
1402         /*
1403          * maybe we have to do work on our outbound queues... at least
1404          * we have to check the outbound-int-capable thinint-capable
1405          * queues
1406          */
1407         if (q->hydra_gives_outbound_pcis) {
1408                 irq_ptr = (struct qdio_irq*)q->irq_ptr;
1409                 for (i=0;i<irq_ptr->no_output_qs;i++) {
1410                         oq = irq_ptr->output_qs[i];
1411 #ifdef QDIO_PERFORMANCE_STATS
1412                         perf_stats.tl_runs--;
1413 #endif /* QDIO_PERFORMANCE_STATS */
1414                         if (!qdio_is_outbound_q_done(oq))
1415                                 __qdio_outbound_processing(oq);
1416                 }
1417         }
1418
1419         if (!qdio_has_inbound_q_moved(q))
1420                 goto out;
1421
1422         qdio_kick_inbound_handler(q);
1423         if (tiqdio_is_inbound_q_done(q))
1424                 if (!qdio_stop_polling(q)) {
1425                         /*
1426                          * we set the flags to get into the stuff next time,
1427                          * see also comment in qdio_stop_polling
1428                          */
1429                         tiqdio_set_summary_bit((__u32*)q->dev_st_chg_ind);
1430                         tiqdio_sched_tl();
1431                 }
1432 out:
1433         qdio_release_q(q);
1434 }
1435
1436 static void
1437 tiqdio_inbound_processing(struct qdio_q *q)
1438 {
1439         __tiqdio_inbound_processing(q, atomic_read(&spare_indicator_usecount));
1440 }
1441
1442 static inline void
1443 __qdio_inbound_processing(struct qdio_q *q)
1444 {
1445         int q_laps=0;
1446
1447         QDIO_DBF_TEXT4(0,trace,"qinproc");
1448         QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
1449
1450         if (unlikely(qdio_reserve_q(q))) {
1451                 qdio_release_q(q);
1452 #ifdef QDIO_PERFORMANCE_STATS
1453                 i_p_c++;
1454 #endif /* QDIO_PERFORMANCE_STATS */
1455                 /* as we're sissies, we'll check next time */
1456                 if (likely(!atomic_read(&q->is_in_shutdown))) {
1457                         qdio_mark_q(q);
1458                         QDIO_DBF_TEXT4(0,trace,"busy,agn");
1459                 }
1460                 return;
1461         }
1462 #ifdef QDIO_PERFORMANCE_STATS
1463         i_p_nc++;
1464         perf_stats.tl_runs++;
1465 #endif /* QDIO_PERFORMANCE_STATS */
1466
1467 again:
1468         if (qdio_has_inbound_q_moved(q)) {
1469                 qdio_kick_inbound_handler(q);
1470                 if (!qdio_stop_polling(q)) {
1471                         q_laps++;
1472                         if (q_laps<QDIO_Q_LAPS)
1473                                 goto again;
1474                 }
1475                 qdio_mark_q(q);
1476         } else {
1477                 if (!qdio_is_inbound_q_done(q))
1478                         /* means poll time is not yet over */
1479                         qdio_mark_q(q);
1480         }
1481
1482         qdio_release_q(q);
1483 }
1484
1485 static void
1486 qdio_inbound_processing(struct qdio_q *q)
1487 {
1488         __qdio_inbound_processing(q);
1489 }
1490
1491 /************************* MAIN ROUTINES *******************************/
1492
1493 #ifdef QDIO_USE_PROCESSING_STATE
1494 static inline int
1495 tiqdio_reset_processing_state(struct qdio_q *q, int q_laps)
1496 {
1497         if (!q) {
1498                 tiqdio_sched_tl();
1499                 return 0;
1500         }
1501
1502         /*
1503          * under VM, we have not used the PROCESSING state, so no
1504          * need to stop polling
1505          */
1506         if (q->siga_sync)
1507                 return 2;
1508
1509         if (unlikely(qdio_reserve_q(q))) {
1510                 qdio_release_q(q);
1511 #ifdef QDIO_PERFORMANCE_STATS
1512                 ii_p_c++;
1513 #endif /* QDIO_PERFORMANCE_STATS */
1514                 /*
1515                  * as we might just be about to stop polling, we make
1516                  * sure that we check again at least once more
1517                  */
1518
1519                 /*
1520                  * sanity -- we'd get here without setting the
1521                  * dev st chg ind
1522                  */
1523                 tiqdio_set_summary_bit((__u32*)q->dev_st_chg_ind);
1524                 tiqdio_sched_tl();
1525                 return 0;
1526         }
1527         if (qdio_stop_polling(q)) {
1528                 qdio_release_q(q);
1529                 return 2;
1530         }
1531         if (q_laps<QDIO_Q_LAPS-1) {
1532                 qdio_release_q(q);
1533                 return 3;
1534         }
1535         /*
1536          * we set the flags to get into the stuff
1537          * next time, see also comment in qdio_stop_polling
1538          */
1539         tiqdio_set_summary_bit((__u32*)q->dev_st_chg_ind);
1540         tiqdio_sched_tl();
1541         qdio_release_q(q);
1542         return 1;
1543
1544 }
1545 #endif /* QDIO_USE_PROCESSING_STATE */
1546
1547 static inline void
1548 tiqdio_inbound_checks(void)
1549 {
1550         struct qdio_q *q;
1551         int spare_ind_was_set=0;
1552 #ifdef QDIO_USE_PROCESSING_STATE
1553         int q_laps=0;
1554 #endif /* QDIO_USE_PROCESSING_STATE */
1555
1556         QDIO_DBF_TEXT4(0,trace,"iqdinbck");
1557         QDIO_DBF_TEXT5(0,trace,"iqlocsum");
1558
1559 #ifdef QDIO_USE_PROCESSING_STATE
1560 again:
1561 #endif /* QDIO_USE_PROCESSING_STATE */
1562
1563         /* when the spare indicator is used and set, save that and clear it */
1564         if ((atomic_read(&spare_indicator_usecount)) && spare_indicator) {
1565                 spare_ind_was_set = 1;
1566                 tiqdio_clear_summary_bit((__u32*)&spare_indicator);
1567         }
1568
1569         q=(struct qdio_q*)tiq_list;
1570         do {
1571                 if (!q)
1572                         break;
1573                 __tiqdio_inbound_processing(q, spare_ind_was_set);
1574                 q=(struct qdio_q*)q->list_next;
1575         } while (q!=(struct qdio_q*)tiq_list);
1576
1577 #ifdef QDIO_USE_PROCESSING_STATE
1578         q=(struct qdio_q*)tiq_list;
1579         do {
1580                 int ret;
1581
1582                 ret = tiqdio_reset_processing_state(q, q_laps);
1583                 switch (ret) {
1584                 case 0:
1585                         return;
1586                 case 1:
1587                         q_laps++;
1588                 case 2:
1589                         q = (struct qdio_q*)q->list_next;
1590                         break;
1591                 default:
1592                         q_laps++;
1593                         goto again;
1594                 }
1595         } while (q!=(struct qdio_q*)tiq_list);
1596 #endif /* QDIO_USE_PROCESSING_STATE */
1597 }
1598
1599 static void
1600 tiqdio_tl(unsigned long data)
1601 {
1602         QDIO_DBF_TEXT4(0,trace,"iqdio_tl");
1603
1604 #ifdef QDIO_PERFORMANCE_STATS
1605         perf_stats.tl_runs++;
1606 #endif /* QDIO_PERFORMANCE_STATS */
1607
1608         tiqdio_inbound_checks();
1609 }
1610
1611 /********************* GENERAL HELPER_ROUTINES ***********************/
1612
1613 static void
1614 qdio_release_irq_memory(struct qdio_irq *irq_ptr)
1615 {
1616         int i;
1617
1618         for (i=0;i<QDIO_MAX_QUEUES_PER_IRQ;i++) {
1619                 if (!irq_ptr->input_qs[i])
1620                         goto next;
1621
1622                 kfree(irq_ptr->input_qs[i]->slib);
1623                 kfree(irq_ptr->input_qs[i]);
1624
1625 next:
1626                 if (!irq_ptr->output_qs[i])
1627                         continue;
1628
1629                 kfree(irq_ptr->output_qs[i]->slib);
1630                 kfree(irq_ptr->output_qs[i]);
1631
1632         }
1633         kfree(irq_ptr->qdr);
1634         kfree(irq_ptr);
1635 }
1636
1637 static void
1638 qdio_set_impl_params(struct qdio_irq *irq_ptr,
1639                      unsigned int qib_param_field_format,
1640                      /* pointer to 128 bytes or NULL, if no param field */
1641                      unsigned char *qib_param_field,
1642                      /* pointer to no_queues*128 words of data or NULL */
1643                      unsigned int no_input_qs,
1644                      unsigned int no_output_qs,
1645                      unsigned long *input_slib_elements,
1646                      unsigned long *output_slib_elements)
1647 {
1648         int i,j;
1649
1650         if (!irq_ptr)
1651                 return;
1652
1653         irq_ptr->qib.pfmt=qib_param_field_format;
1654         if (qib_param_field)
1655                 memcpy(irq_ptr->qib.parm,qib_param_field,
1656                        QDIO_MAX_BUFFERS_PER_Q);
1657
1658         if (input_slib_elements)
1659                 for (i=0;i<no_input_qs;i++) {
1660                         for (j=0;j<QDIO_MAX_BUFFERS_PER_Q;j++)
1661                                 irq_ptr->input_qs[i]->slib->slibe[j].parms=
1662                                         input_slib_elements[
1663                                                 i*QDIO_MAX_BUFFERS_PER_Q+j];
1664                 }
1665         if (output_slib_elements)
1666                 for (i=0;i<no_output_qs;i++) {
1667                         for (j=0;j<QDIO_MAX_BUFFERS_PER_Q;j++)
1668                                 irq_ptr->output_qs[i]->slib->slibe[j].parms=
1669                                         output_slib_elements[
1670                                                 i*QDIO_MAX_BUFFERS_PER_Q+j];
1671                 }
1672 }
1673
1674 static int
1675 qdio_alloc_qs(struct qdio_irq *irq_ptr,
1676               int no_input_qs, int no_output_qs)
1677 {
1678         int i;
1679         struct qdio_q *q;
1680         int result=-ENOMEM;
1681
1682         for (i=0;i<no_input_qs;i++) {
1683                 q=kmalloc(sizeof(struct qdio_q),GFP_KERNEL);
1684
1685                 if (!q) {
1686                         QDIO_PRINT_ERR("kmalloc of q failed!\n");
1687                         goto out;
1688                 }
1689
1690                 memset(q,0,sizeof(struct qdio_q));
1691
1692                 q->slib=kmalloc(PAGE_SIZE,GFP_KERNEL);
1693                 if (!q->slib) {
1694                         QDIO_PRINT_ERR("kmalloc of slib failed!\n");
1695                         goto out;
1696                 }
1697
1698                 irq_ptr->input_qs[i]=q;
1699         }
1700
1701         for (i=0;i<no_output_qs;i++) {
1702                 q=kmalloc(sizeof(struct qdio_q),GFP_KERNEL);
1703
1704                 if (!q) {
1705                         goto out;
1706                 }
1707
1708                 memset(q,0,sizeof(struct qdio_q));
1709
1710                 q->slib=kmalloc(PAGE_SIZE,GFP_KERNEL);
1711                 if (!q->slib) {
1712                         QDIO_PRINT_ERR("kmalloc of slib failed!\n");
1713                         goto out;
1714                 }
1715
1716                 irq_ptr->output_qs[i]=q;
1717         }
1718
1719         result=0;
1720 out:
1721         return result;
1722 }
1723
1724 static void
1725 qdio_fill_qs(struct qdio_irq *irq_ptr, struct ccw_device *cdev,
1726              int no_input_qs, int no_output_qs,
1727              qdio_handler_t *input_handler,
1728              qdio_handler_t *output_handler,
1729              unsigned long int_parm,int q_format,
1730              unsigned long flags,
1731              void **inbound_sbals_array,
1732              void **outbound_sbals_array)
1733 {
1734         struct qdio_q *q;
1735         int i,j;
1736         char dbf_text[20]; /* see qdio_initialize */
1737         void *ptr;
1738         int available;
1739
1740         sprintf(dbf_text,"qfqs%4x",cdev->private->sch_no);
1741         QDIO_DBF_TEXT0(0,setup,dbf_text);
1742         for (i=0;i<no_input_qs;i++) {
1743                 q=irq_ptr->input_qs[i];
1744
1745                 memset(q,0,((char*)&q->slib)-((char*)q));
1746                 sprintf(dbf_text,"in-q%4x",i);
1747                 QDIO_DBF_TEXT0(0,setup,dbf_text);
1748                 QDIO_DBF_HEX0(0,setup,&q,sizeof(void*));
1749
1750                 memset(q->slib,0,PAGE_SIZE);
1751                 q->sl=(struct sl*)(((char*)q->slib)+PAGE_SIZE/2);
1752
1753                 available=0;
1754
1755                 for (j=0;j<QDIO_MAX_BUFFERS_PER_Q;j++)
1756                         q->sbal[j]=*(inbound_sbals_array++);
1757
1758                 q->queue_type=q_format;
1759                 q->int_parm=int_parm;
1760                 q->schid = irq_ptr->schid;
1761                 q->irq_ptr = irq_ptr;
1762                 q->cdev = cdev;
1763                 q->mask=1<<(31-i);
1764                 q->q_no=i;
1765                 q->is_input_q=1;
1766                 q->first_to_check=0;
1767                 q->last_move_ftc=0;
1768                 q->handler=input_handler;
1769                 q->dev_st_chg_ind=irq_ptr->dev_st_chg_ind;
1770
1771                 q->tasklet.data=(unsigned long)q;
1772                 /* q->is_thinint_q isn't valid at this time, but
1773                  * irq_ptr->is_thinint_irq is */
1774                 q->tasklet.func=(void(*)(unsigned long))
1775                         ((irq_ptr->is_thinint_irq)?&tiqdio_inbound_processing:
1776                          &qdio_inbound_processing);
1777
1778                 /* actually this is not used for inbound queues. yet. */
1779                 atomic_set(&q->busy_siga_counter,0);
1780                 q->timing.busy_start=0;
1781
1782 /*              for (j=0;j<QDIO_STATS_NUMBER;j++)
1783                         q->timing.last_transfer_times[j]=(qdio_get_micros()/
1784                                                           QDIO_STATS_NUMBER)*j;
1785                 q->timing.last_transfer_index=QDIO_STATS_NUMBER-1;
1786 */
1787
1788                 /* fill in slib */
1789                 if (i>0) irq_ptr->input_qs[i-1]->slib->nsliba=
1790                                  (unsigned long)(q->slib);
1791                 q->slib->sla=(unsigned long)(q->sl);
1792                 q->slib->slsba=(unsigned long)(&q->slsb.acc.val[0]);
1793
1794                 /* fill in sl */
1795                 for (j=0;j<QDIO_MAX_BUFFERS_PER_Q;j++)
1796                         q->sl->element[j].sbal=(unsigned long)(q->sbal[j]);
1797
1798                 QDIO_DBF_TEXT2(0,setup,"sl-sb-b0");
1799                 ptr=(void*)q->sl;
1800                 QDIO_DBF_HEX2(0,setup,&ptr,sizeof(void*));
1801                 ptr=(void*)&q->slsb;
1802                 QDIO_DBF_HEX2(0,setup,&ptr,sizeof(void*));
1803                 ptr=(void*)q->sbal[0];
1804                 QDIO_DBF_HEX2(0,setup,&ptr,sizeof(void*));
1805
1806                 /* fill in slsb */
1807                 if (!irq_ptr->is_qebsm) {
1808                         unsigned int count = 1;
1809                         for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; j++)
1810                                 set_slsb(q, &j, SLSB_P_INPUT_NOT_INIT, &count);
1811                 }
1812         }
1813
1814         for (i=0;i<no_output_qs;i++) {
1815                 q=irq_ptr->output_qs[i];
1816                 memset(q,0,((char*)&q->slib)-((char*)q));
1817
1818                 sprintf(dbf_text,"outq%4x",i);
1819                 QDIO_DBF_TEXT0(0,setup,dbf_text);
1820                 QDIO_DBF_HEX0(0,setup,&q,sizeof(void*));
1821
1822                 memset(q->slib,0,PAGE_SIZE);
1823                 q->sl=(struct sl*)(((char*)q->slib)+PAGE_SIZE/2);
1824
1825                 available=0;
1826
1827                 for (j=0;j<QDIO_MAX_BUFFERS_PER_Q;j++)
1828                         q->sbal[j]=*(outbound_sbals_array++);
1829
1830                 q->queue_type=q_format;
1831                 q->int_parm=int_parm;
1832                 q->is_input_q=0;
1833                 q->schid = irq_ptr->schid;
1834                 q->cdev = cdev;
1835                 q->irq_ptr = irq_ptr;
1836                 q->mask=1<<(31-i);
1837                 q->q_no=i;
1838                 q->first_to_check=0;
1839                 q->last_move_ftc=0;
1840                 q->handler=output_handler;
1841
1842                 q->tasklet.data=(unsigned long)q;
1843                 q->tasklet.func=(void(*)(unsigned long))
1844                         &qdio_outbound_processing;
1845
1846                 atomic_set(&q->busy_siga_counter,0);
1847                 q->timing.busy_start=0;
1848
1849                 /* fill in slib */
1850                 if (i>0) irq_ptr->output_qs[i-1]->slib->nsliba=
1851                                  (unsigned long)(q->slib);
1852                 q->slib->sla=(unsigned long)(q->sl);
1853                 q->slib->slsba=(unsigned long)(&q->slsb.acc.val[0]);
1854
1855                 /* fill in sl */
1856                 for (j=0;j<QDIO_MAX_BUFFERS_PER_Q;j++)
1857                         q->sl->element[j].sbal=(unsigned long)(q->sbal[j]);
1858
1859                 QDIO_DBF_TEXT2(0,setup,"sl-sb-b0");
1860                 ptr=(void*)q->sl;
1861                 QDIO_DBF_HEX2(0,setup,&ptr,sizeof(void*));
1862                 ptr=(void*)&q->slsb;
1863                 QDIO_DBF_HEX2(0,setup,&ptr,sizeof(void*));
1864                 ptr=(void*)q->sbal[0];
1865                 QDIO_DBF_HEX2(0,setup,&ptr,sizeof(void*));
1866
1867                 /* fill in slsb */
1868                 if (!irq_ptr->is_qebsm) {
1869                         unsigned int count = 1;
1870                         for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; j++)
1871                                 set_slsb(q, &j, SLSB_P_OUTPUT_NOT_INIT, &count);
1872                 }
1873         }
1874 }
1875
1876 static void
1877 qdio_fill_thresholds(struct qdio_irq *irq_ptr,
1878                      unsigned int no_input_qs,
1879                      unsigned int no_output_qs,
1880                      unsigned int min_input_threshold,
1881                      unsigned int max_input_threshold,
1882                      unsigned int min_output_threshold,
1883                      unsigned int max_output_threshold)
1884 {
1885         int i;
1886         struct qdio_q *q;
1887
1888         for (i=0;i<no_input_qs;i++) {
1889                 q=irq_ptr->input_qs[i];
1890                 q->timing.threshold=max_input_threshold;
1891 /*              for (j=0;j<QDIO_STATS_CLASSES;j++) {
1892                         q->threshold_classes[j].threshold=
1893                                 min_input_threshold+
1894                                 (max_input_threshold-min_input_threshold)/
1895                                 QDIO_STATS_CLASSES;
1896                 }
1897                 qdio_use_thresholds(q,QDIO_STATS_CLASSES/2);*/
1898         }
1899         for (i=0;i<no_output_qs;i++) {
1900                 q=irq_ptr->output_qs[i];
1901                 q->timing.threshold=max_output_threshold;
1902 /*              for (j=0;j<QDIO_STATS_CLASSES;j++) {
1903                         q->threshold_classes[j].threshold=
1904                                 min_output_threshold+
1905                                 (max_output_threshold-min_output_threshold)/
1906                                 QDIO_STATS_CLASSES;
1907                 }
1908                 qdio_use_thresholds(q,QDIO_STATS_CLASSES/2);*/
1909         }
1910 }
1911
1912 static int
1913 tiqdio_thinint_handler(void)
1914 {
1915         QDIO_DBF_TEXT4(0,trace,"thin_int");
1916
1917 #ifdef QDIO_PERFORMANCE_STATS
1918         perf_stats.thinints++;
1919         perf_stats.start_time_inbound=NOW;
1920 #endif /* QDIO_PERFORMANCE_STATS */
1921
1922         /* SVS only when needed:
1923          * issue SVS to benefit from iqdio interrupt avoidance
1924          * (SVS clears AISOI)*/
1925         if (!omit_svs)
1926                 tiqdio_clear_global_summary();
1927
1928         tiqdio_inbound_checks();
1929         return 0;
1930 }
1931
1932 static void
1933 qdio_set_state(struct qdio_irq *irq_ptr, enum qdio_irq_states state)
1934 {
1935         int i;
1936 #ifdef CONFIG_QDIO_DEBUG
1937         char dbf_text[15];
1938
1939         QDIO_DBF_TEXT5(0,trace,"newstate");
1940         sprintf(dbf_text,"%4x%4x",irq_ptr->schid.sch_no,state);
1941         QDIO_DBF_TEXT5(0,trace,dbf_text);
1942 #endif /* CONFIG_QDIO_DEBUG */
1943
1944         irq_ptr->state=state;
1945         for (i=0;i<irq_ptr->no_input_qs;i++)
1946                 irq_ptr->input_qs[i]->state=state;
1947         for (i=0;i<irq_ptr->no_output_qs;i++)
1948                 irq_ptr->output_qs[i]->state=state;
1949         mb();
1950 }
1951
1952 static inline void
1953 qdio_irq_check_sense(struct subchannel_id schid, struct irb *irb)
1954 {
1955         char dbf_text[15];
1956
1957         if (irb->esw.esw0.erw.cons) {
1958                 sprintf(dbf_text,"sens%4x",schid.sch_no);
1959                 QDIO_DBF_TEXT2(1,trace,dbf_text);
1960                 QDIO_DBF_HEX0(0,sense,irb,QDIO_DBF_SENSE_LEN);
1961
1962                 QDIO_PRINT_WARN("sense data available on qdio channel.\n");
1963                 HEXDUMP16(WARN,"irb: ",irb);
1964                 HEXDUMP16(WARN,"sense data: ",irb->ecw);
1965         }
1966
1967 }
1968
1969 static inline void
1970 qdio_handle_pci(struct qdio_irq *irq_ptr)
1971 {
1972         int i;
1973         struct qdio_q *q;
1974
1975 #ifdef QDIO_PERFORMANCE_STATS
1976         perf_stats.pcis++;
1977         perf_stats.start_time_inbound=NOW;
1978 #endif /* QDIO_PERFORMANCE_STATS */
1979         for (i=0;i<irq_ptr->no_input_qs;i++) {
1980                 q=irq_ptr->input_qs[i];
1981                 if (q->is_input_q&QDIO_FLAG_NO_INPUT_INTERRUPT_CONTEXT)
1982                         qdio_mark_q(q);
1983                 else {
1984 #ifdef QDIO_PERFORMANCE_STATS
1985                         perf_stats.tl_runs--;
1986 #endif /* QDIO_PERFORMANCE_STATS */
1987                         __qdio_inbound_processing(q);
1988                 }
1989         }
1990         if (!irq_ptr->hydra_gives_outbound_pcis)
1991                 return;
1992         for (i=0;i<irq_ptr->no_output_qs;i++) {
1993                 q=irq_ptr->output_qs[i];
1994 #ifdef QDIO_PERFORMANCE_STATS
1995                 perf_stats.tl_runs--;
1996 #endif /* QDIO_PERFORMANCE_STATS */
1997                 if (qdio_is_outbound_q_done(q))
1998                         continue;
1999                 if (!irq_ptr->sync_done_on_outb_pcis)
2000                         SYNC_MEMORY;
2001                 __qdio_outbound_processing(q);
2002         }
2003 }
2004
2005 static void qdio_establish_handle_irq(struct ccw_device*, int, int);
2006
2007 static inline void
2008 qdio_handle_activate_check(struct ccw_device *cdev, unsigned long intparm,
2009                            int cstat, int dstat)
2010 {
2011         struct qdio_irq *irq_ptr;
2012         struct qdio_q *q;
2013         char dbf_text[15];
2014
2015         irq_ptr = cdev->private->qdio_data;
2016
2017         QDIO_DBF_TEXT2(1, trace, "ick2");
2018         sprintf(dbf_text,"%s", cdev->dev.bus_id);
2019         QDIO_DBF_TEXT2(1,trace,dbf_text);
2020         QDIO_DBF_HEX2(0,trace,&intparm,sizeof(int));
2021         QDIO_DBF_HEX2(0,trace,&dstat,sizeof(int));
2022         QDIO_DBF_HEX2(0,trace,&cstat,sizeof(int));
2023         QDIO_PRINT_ERR("received check condition on activate " \
2024                        "queues on device %s (cs=x%x, ds=x%x).\n",
2025                        cdev->dev.bus_id, cstat, dstat);
2026         if (irq_ptr->no_input_qs) {
2027                 q=irq_ptr->input_qs[0];
2028         } else if (irq_ptr->no_output_qs) {
2029                 q=irq_ptr->output_qs[0];
2030         } else {
2031                 QDIO_PRINT_ERR("oops... no queue registered for device %s!?\n",
2032                                cdev->dev.bus_id);
2033                 goto omit_handler_call;
2034         }
2035         q->handler(q->cdev,QDIO_STATUS_ACTIVATE_CHECK_CONDITION|
2036                    QDIO_STATUS_LOOK_FOR_ERROR,
2037                    0,0,0,-1,-1,q->int_parm);
2038 omit_handler_call:
2039         qdio_set_state(irq_ptr,QDIO_IRQ_STATE_STOPPED);
2040
2041 }
2042
2043 static void
2044 qdio_call_shutdown(void *data)
2045 {
2046         struct ccw_device *cdev;
2047
2048         cdev = (struct ccw_device *)data;
2049         qdio_shutdown(cdev, QDIO_FLAG_CLEANUP_USING_CLEAR);
2050         put_device(&cdev->dev);
2051 }
2052
2053 static void
2054 qdio_timeout_handler(struct ccw_device *cdev)
2055 {
2056         struct qdio_irq *irq_ptr;
2057         char dbf_text[15];
2058
2059         QDIO_DBF_TEXT2(0, trace, "qtoh");
2060         sprintf(dbf_text, "%s", cdev->dev.bus_id);
2061         QDIO_DBF_TEXT2(0, trace, dbf_text);
2062
2063         irq_ptr = cdev->private->qdio_data;
2064         sprintf(dbf_text, "state:%d", irq_ptr->state);
2065         QDIO_DBF_TEXT2(0, trace, dbf_text);
2066
2067         switch (irq_ptr->state) {
2068         case QDIO_IRQ_STATE_INACTIVE:
2069                 QDIO_PRINT_ERR("establish queues on irq %04x: timed out\n",
2070                                irq_ptr->schid.sch_no);
2071                 QDIO_DBF_TEXT2(1,setup,"eq:timeo");
2072                 qdio_set_state(irq_ptr, QDIO_IRQ_STATE_ERR);
2073                 break;
2074         case QDIO_IRQ_STATE_CLEANUP:
2075                 QDIO_PRINT_INFO("Did not get interrupt on cleanup, irq=0x%x.\n",
2076                                 irq_ptr->schid.sch_no);
2077                 qdio_set_state(irq_ptr, QDIO_IRQ_STATE_ERR);
2078                 break;
2079         case QDIO_IRQ_STATE_ESTABLISHED:
2080         case QDIO_IRQ_STATE_ACTIVE:
2081                 /* I/O has been terminated by common I/O layer. */
2082                 QDIO_PRINT_INFO("Queues on irq %04x killed by cio.\n",
2083                                 irq_ptr->schid.sch_no);
2084                 QDIO_DBF_TEXT2(1, trace, "cio:term");
2085                 qdio_set_state(irq_ptr, QDIO_IRQ_STATE_STOPPED);
2086                 if (get_device(&cdev->dev)) {
2087                         /* Can't call shutdown from interrupt context. */
2088                         PREPARE_WORK(&cdev->private->kick_work,
2089                                      qdio_call_shutdown, (void *)cdev);
2090                         queue_work(ccw_device_work, &cdev->private->kick_work);
2091                 }
2092                 break;
2093         default:
2094                 BUG();
2095         }
2096         ccw_device_set_timeout(cdev, 0);
2097         wake_up(&cdev->private->wait_q);
2098 }
2099
2100 static void
2101 qdio_handler(struct ccw_device *cdev, unsigned long intparm, struct irb *irb)
2102 {
2103         struct qdio_irq *irq_ptr;
2104         int cstat,dstat;
2105         char dbf_text[15];
2106
2107 #ifdef CONFIG_QDIO_DEBUG
2108         QDIO_DBF_TEXT4(0, trace, "qint");
2109         sprintf(dbf_text, "%s", cdev->dev.bus_id);
2110         QDIO_DBF_TEXT4(0, trace, dbf_text);
2111 #endif /* CONFIG_QDIO_DEBUG */
2112
2113         if (!intparm) {
2114                 QDIO_PRINT_ERR("got unsolicited interrupt in qdio " \
2115                                   "handler, device %s\n", cdev->dev.bus_id);
2116                 return;
2117         }
2118
2119         irq_ptr = cdev->private->qdio_data;
2120         if (!irq_ptr) {
2121                 QDIO_DBF_TEXT2(1, trace, "uint");
2122                 sprintf(dbf_text,"%s", cdev->dev.bus_id);
2123                 QDIO_DBF_TEXT2(1,trace,dbf_text);
2124                 QDIO_PRINT_ERR("received interrupt on unused device %s!\n",
2125                                cdev->dev.bus_id);
2126                 return;
2127         }
2128
2129         if (IS_ERR(irb)) {
2130                 /* Currently running i/o is in error. */
2131                 switch (PTR_ERR(irb)) {
2132                 case -EIO:
2133                         QDIO_PRINT_ERR("i/o error on device %s\n",
2134                                        cdev->dev.bus_id);
2135                         return;
2136                 case -ETIMEDOUT:
2137                         qdio_timeout_handler(cdev);
2138                         return;
2139                 default:
2140                         QDIO_PRINT_ERR("unknown error state %ld on device %s\n",
2141                                        PTR_ERR(irb), cdev->dev.bus_id);
2142                         return;
2143                 }
2144         }
2145
2146         qdio_irq_check_sense(irq_ptr->schid, irb);
2147
2148 #ifdef CONFIG_QDIO_DEBUG
2149         sprintf(dbf_text, "state:%d", irq_ptr->state);
2150         QDIO_DBF_TEXT4(0, trace, dbf_text);
2151 #endif /* CONFIG_QDIO_DEBUG */
2152
2153         cstat = irb->scsw.cstat;
2154         dstat = irb->scsw.dstat;
2155
2156         switch (irq_ptr->state) {
2157         case QDIO_IRQ_STATE_INACTIVE:
2158                 qdio_establish_handle_irq(cdev, cstat, dstat);
2159                 break;
2160
2161         case QDIO_IRQ_STATE_CLEANUP:
2162                 qdio_set_state(irq_ptr, QDIO_IRQ_STATE_INACTIVE);
2163                 break;
2164
2165         case QDIO_IRQ_STATE_ESTABLISHED:
2166         case QDIO_IRQ_STATE_ACTIVE:
2167                 if (cstat & SCHN_STAT_PCI) {
2168                         qdio_handle_pci(irq_ptr);
2169                         break;
2170                 }
2171
2172                 if ((cstat&~SCHN_STAT_PCI)||dstat) {
2173                         qdio_handle_activate_check(cdev, intparm, cstat, dstat);
2174                         break;
2175                 }
2176         default:
2177                 QDIO_PRINT_ERR("got interrupt for queues in state %d on " \
2178                                "device %s?!\n",
2179                                irq_ptr->state, cdev->dev.bus_id);
2180         }
2181         wake_up(&cdev->private->wait_q);
2182
2183 }
2184
2185 int
2186 qdio_synchronize(struct ccw_device *cdev, unsigned int flags,
2187                  unsigned int queue_number)
2188 {
2189         int cc = 0;
2190         struct qdio_q *q;
2191         struct qdio_irq *irq_ptr;
2192         void *ptr;
2193 #ifdef CONFIG_QDIO_DEBUG
2194         char dbf_text[15]="SyncXXXX";
2195 #endif
2196
2197         irq_ptr = cdev->private->qdio_data;
2198         if (!irq_ptr)
2199                 return -ENODEV;
2200
2201 #ifdef CONFIG_QDIO_DEBUG
2202         *((int*)(&dbf_text[4])) = irq_ptr->schid.sch_no;
2203         QDIO_DBF_HEX4(0,trace,dbf_text,QDIO_DBF_TRACE_LEN);
2204         *((int*)(&dbf_text[0]))=flags;
2205         *((int*)(&dbf_text[4]))=queue_number;
2206         QDIO_DBF_HEX4(0,trace,dbf_text,QDIO_DBF_TRACE_LEN);
2207 #endif /* CONFIG_QDIO_DEBUG */
2208
2209         if (flags&QDIO_FLAG_SYNC_INPUT) {
2210                 q=irq_ptr->input_qs[queue_number];
2211                 if (!q)
2212                         return -EINVAL;
2213                 if (!(irq_ptr->is_qebsm))
2214                         cc = do_siga_sync(q->schid, 0, q->mask);
2215         } else if (flags&QDIO_FLAG_SYNC_OUTPUT) {
2216                 q=irq_ptr->output_qs[queue_number];
2217                 if (!q)
2218                         return -EINVAL;
2219                 if (!(irq_ptr->is_qebsm))
2220                         cc = do_siga_sync(q->schid, q->mask, 0);
2221         } else
2222                 return -EINVAL;
2223
2224         ptr=&cc;
2225         if (cc)
2226                 QDIO_DBF_HEX3(0,trace,&ptr,sizeof(int));
2227
2228         return cc;
2229 }
2230
2231 static inline void
2232 qdio_check_subchannel_qebsm(struct qdio_irq *irq_ptr, unsigned char qdioac,
2233                             unsigned long token)
2234 {
2235         struct qdio_q *q;
2236         int i;
2237         unsigned int count, start_buf;
2238         char dbf_text[15];
2239
2240         /*check if QEBSM is disabled */
2241         if (!(irq_ptr->is_qebsm) || !(qdioac & 0x01)) {
2242                 irq_ptr->is_qebsm  = 0;
2243                 irq_ptr->sch_token = 0;
2244                 irq_ptr->qib.rflags &= ~QIB_RFLAGS_ENABLE_QEBSM;
2245                 QDIO_DBF_TEXT0(0,setup,"noV=V");
2246                 return;
2247         }
2248         irq_ptr->sch_token = token;
2249         /*input queue*/
2250         for (i = 0; i < irq_ptr->no_input_qs;i++) {
2251                 q = irq_ptr->input_qs[i];
2252                 count = QDIO_MAX_BUFFERS_PER_Q;
2253                 start_buf = 0;
2254                 set_slsb(q, &start_buf, SLSB_P_INPUT_NOT_INIT, &count);
2255         }
2256         sprintf(dbf_text,"V=V:%2x",irq_ptr->is_qebsm);
2257         QDIO_DBF_TEXT0(0,setup,dbf_text);
2258         sprintf(dbf_text,"%8lx",irq_ptr->sch_token);
2259         QDIO_DBF_TEXT0(0,setup,dbf_text);
2260         /*output queue*/
2261         for (i = 0; i < irq_ptr->no_output_qs; i++) {
2262                 q = irq_ptr->output_qs[i];
2263                 count = QDIO_MAX_BUFFERS_PER_Q;
2264                 start_buf = 0;
2265                 set_slsb(q, &start_buf, SLSB_P_OUTPUT_NOT_INIT, &count);
2266         }
2267 }
2268
2269 static void
2270 qdio_get_ssqd_information(struct qdio_irq *irq_ptr)
2271 {
2272         int result;
2273         unsigned char qdioac;
2274         struct {
2275                 struct chsc_header request;
2276                 u16 reserved1;
2277                 u16 first_sch;
2278                 u16 reserved2;
2279                 u16 last_sch;
2280                 u32 reserved3;
2281                 struct chsc_header response;
2282                 u32 reserved4;
2283                 u8  flags;
2284                 u8  reserved5;
2285                 u16 sch;
2286                 u8  qfmt;
2287                 u8  parm;
2288                 u8  qdioac1;
2289                 u8  sch_class;
2290                 u8  reserved7;
2291                 u8  icnt;
2292                 u8  reserved8;
2293                 u8  ocnt;
2294                 u8 reserved9;
2295                 u8 mbccnt;
2296                 u16 qdioac2;
2297                 u64 sch_token;
2298         } *ssqd_area;
2299
2300         QDIO_DBF_TEXT0(0,setup,"getssqd");
2301         qdioac = 0;
2302         ssqd_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA);
2303         if (!ssqd_area) {
2304                 QDIO_PRINT_WARN("Could not get memory for chsc. Using all " \
2305                                 "SIGAs for sch x%x.\n", irq_ptr->schid.sch_no);
2306                 irq_ptr->qdioac = CHSC_FLAG_SIGA_INPUT_NECESSARY ||
2307                                   CHSC_FLAG_SIGA_OUTPUT_NECESSARY ||
2308                                   CHSC_FLAG_SIGA_SYNC_NECESSARY; /* all flags set */
2309                 irq_ptr->is_qebsm = 0;
2310                 irq_ptr->sch_token = 0;
2311                 irq_ptr->qib.rflags &= ~QIB_RFLAGS_ENABLE_QEBSM;
2312                 return;
2313         }
2314
2315         ssqd_area->request = (struct chsc_header) {
2316                 .length = 0x0010,
2317                 .code   = 0x0024,
2318         };
2319         ssqd_area->first_sch = irq_ptr->schid.sch_no;
2320         ssqd_area->last_sch = irq_ptr->schid.sch_no;
2321         result = chsc(ssqd_area);
2322
2323         if (result) {
2324                 QDIO_PRINT_WARN("CHSC returned cc %i. Using all " \
2325                                 "SIGAs for sch x%x.\n",
2326                                 result, irq_ptr->schid.sch_no);
2327                 qdioac = CHSC_FLAG_SIGA_INPUT_NECESSARY ||
2328                         CHSC_FLAG_SIGA_OUTPUT_NECESSARY ||
2329                         CHSC_FLAG_SIGA_SYNC_NECESSARY; /* all flags set */
2330                 irq_ptr->is_qebsm  = 0;
2331                 goto out;
2332         }
2333
2334         if (ssqd_area->response.code != QDIO_CHSC_RESPONSE_CODE_OK) {
2335                 QDIO_PRINT_WARN("response upon checking SIGA needs " \
2336                                 "is 0x%x. Using all SIGAs for sch x%x.\n",
2337                                 ssqd_area->response.code, irq_ptr->schid.sch_no);
2338                 qdioac = CHSC_FLAG_SIGA_INPUT_NECESSARY ||
2339                         CHSC_FLAG_SIGA_OUTPUT_NECESSARY ||
2340                         CHSC_FLAG_SIGA_SYNC_NECESSARY; /* all flags set */
2341                 irq_ptr->is_qebsm  = 0;
2342                 goto out;
2343         }
2344         if (!(ssqd_area->flags & CHSC_FLAG_QDIO_CAPABILITY) ||
2345             !(ssqd_area->flags & CHSC_FLAG_VALIDITY) ||
2346             (ssqd_area->sch != irq_ptr->schid.sch_no)) {
2347                 QDIO_PRINT_WARN("huh? problems checking out sch x%x... " \
2348                                 "using all SIGAs.\n",irq_ptr->schid.sch_no);
2349                 qdioac = CHSC_FLAG_SIGA_INPUT_NECESSARY |
2350                         CHSC_FLAG_SIGA_OUTPUT_NECESSARY |
2351                         CHSC_FLAG_SIGA_SYNC_NECESSARY; /* worst case */
2352                 irq_ptr->is_qebsm  = 0;
2353                 goto out;
2354         }
2355         qdioac = ssqd_area->qdioac1;
2356 out:
2357         qdio_check_subchannel_qebsm(irq_ptr, qdioac,
2358                                     ssqd_area->sch_token);
2359         free_page ((unsigned long) ssqd_area);
2360         irq_ptr->qdioac = qdioac;
2361 }
2362
2363 static unsigned int
2364 tiqdio_check_chsc_availability(void)
2365 {
2366         char dbf_text[15];
2367
2368         if (!css_characteristics_avail)
2369                 return -EIO;
2370
2371         /* Check for bit 41. */
2372         if (!css_general_characteristics.aif) {
2373                 QDIO_PRINT_WARN("Adapter interruption facility not " \
2374                                 "installed.\n");
2375                 return -ENOENT;
2376         }
2377
2378         /* Check for bits 107 and 108. */
2379         if (!css_chsc_characteristics.scssc ||
2380             !css_chsc_characteristics.scsscf) {
2381                 QDIO_PRINT_WARN("Set Chan Subsys. Char. & Fast-CHSCs " \
2382                                 "not available.\n");
2383                 return -ENOENT;
2384         }
2385
2386         /* Check for OSA/FCP thin interrupts (bit 67). */
2387         hydra_thinints = css_general_characteristics.aif_osa;
2388         sprintf(dbf_text,"hydrati%1x", hydra_thinints);
2389         QDIO_DBF_TEXT0(0,setup,dbf_text);
2390
2391 #ifdef CONFIG_ARCH_S390X
2392         /* Check for QEBSM support in general (bit 58). */
2393         is_passthrough = css_general_characteristics.qebsm;
2394 #endif
2395         sprintf(dbf_text,"cssQBS:%1x", is_passthrough);
2396         QDIO_DBF_TEXT0(0,setup,dbf_text);
2397
2398         /* Check for aif time delay disablement fac (bit 56). If installed,
2399          * omit svs even under lpar (good point by rick again) */
2400         omit_svs = css_general_characteristics.aif_tdd;
2401         sprintf(dbf_text,"omitsvs%1x", omit_svs);
2402         QDIO_DBF_TEXT0(0,setup,dbf_text);
2403         return 0;
2404 }
2405
2406
2407 static unsigned int
2408 tiqdio_set_subchannel_ind(struct qdio_irq *irq_ptr, int reset_to_zero)
2409 {
2410         unsigned long real_addr_local_summary_bit;
2411         unsigned long real_addr_dev_st_chg_ind;
2412         void *ptr;
2413         char dbf_text[15];
2414
2415         unsigned int resp_code;
2416         int result;
2417
2418         struct {
2419                 struct chsc_header request;
2420                 u16 operation_code;
2421                 u16 reserved1;
2422                 u32 reserved2;
2423                 u32 reserved3;
2424                 u64 summary_indicator_addr;
2425                 u64 subchannel_indicator_addr;
2426                 u32 ks:4;
2427                 u32 kc:4;
2428                 u32 reserved4:21;
2429                 u32 isc:3;
2430                 u32 word_with_d_bit;
2431                 /* set to 0x10000000 to enable
2432                  * time delay disablement facility */
2433                 u32 reserved5;
2434                 struct subchannel_id schid;
2435                 u32 reserved6[1004];
2436                 struct chsc_header response;
2437                 u32 reserved7;
2438         } *scssc_area;
2439
2440         if (!irq_ptr->is_thinint_irq)
2441                 return -ENODEV;
2442
2443         if (reset_to_zero) {
2444                 real_addr_local_summary_bit=0;
2445                 real_addr_dev_st_chg_ind=0;
2446         } else {
2447                 real_addr_local_summary_bit=
2448                         virt_to_phys((volatile void *)indicators);
2449                 real_addr_dev_st_chg_ind=
2450                         virt_to_phys((volatile void *)irq_ptr->dev_st_chg_ind);
2451         }
2452
2453         scssc_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA);
2454         if (!scssc_area) {
2455                 QDIO_PRINT_WARN("No memory for setting indicators on " \
2456                                 "subchannel x%x.\n", irq_ptr->schid.sch_no);
2457                 return -ENOMEM;
2458         }
2459         scssc_area->request = (struct chsc_header) {
2460                 .length = 0x0fe0,
2461                 .code   = 0x0021,
2462         };
2463         scssc_area->operation_code = 0;
2464
2465         scssc_area->summary_indicator_addr = real_addr_local_summary_bit;
2466         scssc_area->subchannel_indicator_addr = real_addr_dev_st_chg_ind;
2467         scssc_area->ks = QDIO_STORAGE_KEY;
2468         scssc_area->kc = QDIO_STORAGE_KEY;
2469         scssc_area->isc = TIQDIO_THININT_ISC;
2470         scssc_area->schid = irq_ptr->schid;
2471         /* enables the time delay disablement facility. Don't care
2472          * whether it is really there (i.e. we haven't checked for
2473          * it) */
2474         if (css_general_characteristics.aif_tdd)
2475                 scssc_area->word_with_d_bit = 0x10000000;
2476         else
2477                 QDIO_PRINT_WARN("Time delay disablement facility " \
2478                                 "not available\n");
2479
2480         result = chsc(scssc_area);
2481         if (result) {
2482                 QDIO_PRINT_WARN("could not set indicators on irq x%x, " \
2483                                 "cc=%i.\n",irq_ptr->schid.sch_no,result);
2484                 result = -EIO;
2485                 goto out;
2486         }
2487
2488         resp_code = scssc_area->response.code;
2489         if (resp_code!=QDIO_CHSC_RESPONSE_CODE_OK) {
2490                 QDIO_PRINT_WARN("response upon setting indicators " \
2491                                 "is 0x%x.\n",resp_code);
2492                 sprintf(dbf_text,"sidR%4x",resp_code);
2493                 QDIO_DBF_TEXT1(0,trace,dbf_text);
2494                 QDIO_DBF_TEXT1(0,setup,dbf_text);
2495                 ptr=&scssc_area->response;
2496                 QDIO_DBF_HEX2(1,setup,&ptr,QDIO_DBF_SETUP_LEN);
2497                 result = -EIO;
2498                 goto out;
2499         }
2500
2501         QDIO_DBF_TEXT2(0,setup,"setscind");
2502         QDIO_DBF_HEX2(0,setup,&real_addr_local_summary_bit,
2503                       sizeof(unsigned long));
2504         QDIO_DBF_HEX2(0,setup,&real_addr_dev_st_chg_ind,sizeof(unsigned long));
2505         result = 0;
2506 out:
2507         free_page ((unsigned long) scssc_area);
2508         return result;
2509
2510 }
2511
2512 static unsigned int
2513 tiqdio_set_delay_target(struct qdio_irq *irq_ptr, unsigned long delay_target)
2514 {
2515         unsigned int resp_code;
2516         int result;
2517         void *ptr;
2518         char dbf_text[15];
2519
2520         struct {
2521                 struct chsc_header request;
2522                 u16 operation_code;
2523                 u16 reserved1;
2524                 u32 reserved2;
2525                 u32 reserved3;
2526                 u32 reserved4[2];
2527                 u32 delay_target;
2528                 u32 reserved5[1009];
2529                 struct chsc_header response;
2530                 u32 reserved6;
2531         } *scsscf_area;
2532
2533         if (!irq_ptr->is_thinint_irq)
2534                 return -ENODEV;
2535
2536         scsscf_area = (void *)get_zeroed_page(GFP_KERNEL | GFP_DMA);
2537         if (!scsscf_area) {
2538                 QDIO_PRINT_WARN("No memory for setting delay target on " \
2539                                 "subchannel x%x.\n", irq_ptr->schid.sch_no);
2540                 return -ENOMEM;
2541         }
2542         scsscf_area->request = (struct chsc_header) {
2543                 .length = 0x0fe0,
2544                 .code   = 0x1027,
2545         };
2546
2547         scsscf_area->delay_target = delay_target<<16;
2548
2549         result=chsc(scsscf_area);
2550         if (result) {
2551                 QDIO_PRINT_WARN("could not set delay target on irq x%x, " \
2552                                 "cc=%i. Continuing.\n",irq_ptr->schid.sch_no,
2553                                 result);
2554                 result = -EIO;
2555                 goto out;
2556         }
2557
2558         resp_code = scsscf_area->response.code;
2559         if (resp_code!=QDIO_CHSC_RESPONSE_CODE_OK) {
2560                 QDIO_PRINT_WARN("response upon setting delay target " \
2561                                 "is 0x%x. Continuing.\n",resp_code);
2562                 sprintf(dbf_text,"sdtR%4x",resp_code);
2563                 QDIO_DBF_TEXT1(0,trace,dbf_text);
2564                 QDIO_DBF_TEXT1(0,setup,dbf_text);
2565                 ptr=&scsscf_area->response;
2566                 QDIO_DBF_HEX2(1,trace,&ptr,QDIO_DBF_TRACE_LEN);
2567         }
2568         QDIO_DBF_TEXT2(0,trace,"delytrgt");
2569         QDIO_DBF_HEX2(0,trace,&delay_target,sizeof(unsigned long));
2570         result = 0; /* not critical */
2571 out:
2572         free_page ((unsigned long) scsscf_area);
2573         return result;
2574 }
2575
2576 int
2577 qdio_cleanup(struct ccw_device *cdev, int how)
2578 {
2579         struct qdio_irq *irq_ptr;
2580         char dbf_text[15];
2581         int rc;
2582
2583         irq_ptr = cdev->private->qdio_data;
2584         if (!irq_ptr)
2585                 return -ENODEV;
2586
2587         sprintf(dbf_text,"qcln%4x",irq_ptr->schid.sch_no);
2588         QDIO_DBF_TEXT1(0,trace,dbf_text);
2589         QDIO_DBF_TEXT0(0,setup,dbf_text);
2590
2591         rc = qdio_shutdown(cdev, how);
2592         if ((rc == 0) || (rc == -EINPROGRESS))
2593                 rc = qdio_free(cdev);
2594         return rc;
2595 }
2596
2597 int
2598 qdio_shutdown(struct ccw_device *cdev, int how)
2599 {
2600         struct qdio_irq *irq_ptr;
2601         int i;
2602         int result = 0;
2603         int rc;
2604         unsigned long flags;
2605         int timeout;
2606         char dbf_text[15];
2607
2608         irq_ptr = cdev->private->qdio_data;
2609         if (!irq_ptr)
2610                 return -ENODEV;
2611
2612         down(&irq_ptr->setting_up_sema);
2613
2614         sprintf(dbf_text,"qsqs%4x",irq_ptr->schid.sch_no);
2615         QDIO_DBF_TEXT1(0,trace,dbf_text);
2616         QDIO_DBF_TEXT0(0,setup,dbf_text);
2617
2618         /* mark all qs as uninteresting */
2619         for (i=0;i<irq_ptr->no_input_qs;i++)
2620                 atomic_set(&irq_ptr->input_qs[i]->is_in_shutdown,1);
2621
2622         for (i=0;i<irq_ptr->no_output_qs;i++)
2623                 atomic_set(&irq_ptr->output_qs[i]->is_in_shutdown,1);
2624
2625         tasklet_kill(&tiqdio_tasklet);
2626
2627         for (i=0;i<irq_ptr->no_input_qs;i++) {
2628                 qdio_unmark_q(irq_ptr->input_qs[i]);
2629                 tasklet_kill(&irq_ptr->input_qs[i]->tasklet);
2630                 wait_event_interruptible_timeout(cdev->private->wait_q,
2631                                                  !atomic_read(&irq_ptr->
2632                                                               input_qs[i]->
2633                                                               use_count),
2634                                                  QDIO_NO_USE_COUNT_TIMEOUT);
2635                 if (atomic_read(&irq_ptr->input_qs[i]->use_count))
2636                         result=-EINPROGRESS;
2637         }
2638
2639         for (i=0;i<irq_ptr->no_output_qs;i++) {
2640                 tasklet_kill(&irq_ptr->output_qs[i]->tasklet);
2641                 wait_event_interruptible_timeout(cdev->private->wait_q,
2642                                                  !atomic_read(&irq_ptr->
2643                                                               output_qs[i]->
2644                                                               use_count),
2645                                                  QDIO_NO_USE_COUNT_TIMEOUT);
2646                 if (atomic_read(&irq_ptr->output_qs[i]->use_count))
2647                         result=-EINPROGRESS;
2648         }
2649
2650         /* cleanup subchannel */
2651         spin_lock_irqsave(get_ccwdev_lock(cdev),flags);
2652         if (how&QDIO_FLAG_CLEANUP_USING_CLEAR) {
2653                 rc = ccw_device_clear(cdev, QDIO_DOING_CLEANUP);
2654                 timeout=QDIO_CLEANUP_CLEAR_TIMEOUT;
2655         } else if (how&QDIO_FLAG_CLEANUP_USING_HALT) {
2656                 rc = ccw_device_halt(cdev, QDIO_DOING_CLEANUP);
2657                 timeout=QDIO_CLEANUP_HALT_TIMEOUT;
2658         } else { /* default behaviour */
2659                 rc = ccw_device_halt(cdev, QDIO_DOING_CLEANUP);
2660                 timeout=QDIO_CLEANUP_HALT_TIMEOUT;
2661         }
2662         if (rc == -ENODEV) {
2663                 /* No need to wait for device no longer present. */
2664                 qdio_set_state(irq_ptr, QDIO_IRQ_STATE_INACTIVE);
2665                 spin_unlock_irqrestore(get_ccwdev_lock(cdev), flags);
2666         } else if (((void *)cdev->handler != (void *)qdio_handler) && rc == 0) {
2667                 /*
2668                  * Whoever put another handler there, has to cope with the
2669                  * interrupt theirself. Might happen if qdio_shutdown was
2670                  * called on already shutdown queues, but this shouldn't have
2671                  * bad side effects.
2672                  */
2673                 qdio_set_state(irq_ptr, QDIO_IRQ_STATE_INACTIVE);
2674                 spin_unlock_irqrestore(get_ccwdev_lock(cdev), flags);
2675         } else if (rc == 0) {
2676                 qdio_set_state(irq_ptr, QDIO_IRQ_STATE_CLEANUP);
2677                 ccw_device_set_timeout(cdev, timeout);
2678                 spin_unlock_irqrestore(get_ccwdev_lock(cdev),flags);
2679
2680                 wait_event(cdev->private->wait_q,
2681                            irq_ptr->state == QDIO_IRQ_STATE_INACTIVE ||
2682                            irq_ptr->state == QDIO_IRQ_STATE_ERR);
2683         } else {
2684                 QDIO_PRINT_INFO("ccw_device_{halt,clear} returned %d for "
2685                                 "device %s\n", result, cdev->dev.bus_id);
2686                 spin_unlock_irqrestore(get_ccwdev_lock(cdev), flags);
2687                 result = rc;
2688                 goto out;
2689         }
2690         if (irq_ptr->is_thinint_irq) {
2691                 qdio_put_indicator((__u32*)irq_ptr->dev_st_chg_ind);
2692                 tiqdio_set_subchannel_ind(irq_ptr,1);
2693                 /* reset adapter interrupt indicators */
2694         }
2695
2696         /* exchange int handlers, if necessary */
2697         if ((void*)cdev->handler == (void*)qdio_handler)
2698                 cdev->handler=irq_ptr->original_int_handler;
2699
2700         /* Ignore errors. */
2701         qdio_set_state(irq_ptr, QDIO_IRQ_STATE_INACTIVE);
2702         ccw_device_set_timeout(cdev, 0);
2703 out:
2704         up(&irq_ptr->setting_up_sema);
2705         return result;
2706 }
2707
2708 int
2709 qdio_free(struct ccw_device *cdev)
2710 {
2711         struct qdio_irq *irq_ptr;
2712         char dbf_text[15];
2713
2714         irq_ptr = cdev->private->qdio_data;
2715         if (!irq_ptr)
2716                 return -ENODEV;
2717
2718         down(&irq_ptr->setting_up_sema);
2719
2720         sprintf(dbf_text,"qfqs%4x",irq_ptr->schid.sch_no);
2721         QDIO_DBF_TEXT1(0,trace,dbf_text);
2722         QDIO_DBF_TEXT0(0,setup,dbf_text);
2723
2724         cdev->private->qdio_data = 0;
2725
2726         up(&irq_ptr->setting_up_sema);
2727
2728         qdio_release_irq_memory(irq_ptr);
2729         module_put(THIS_MODULE);
2730         return 0;
2731 }
2732
2733 static inline void
2734 qdio_allocate_do_dbf(struct qdio_initialize *init_data)
2735 {
2736         char dbf_text[20]; /* if a printf printed out more than 8 chars */
2737
2738         sprintf(dbf_text,"qfmt:%x",init_data->q_format);
2739         QDIO_DBF_TEXT0(0,setup,dbf_text);
2740         QDIO_DBF_HEX0(0,setup,init_data->adapter_name,8);
2741         sprintf(dbf_text,"qpff%4x",init_data->qib_param_field_format);
2742         QDIO_DBF_TEXT0(0,setup,dbf_text);
2743         QDIO_DBF_HEX0(0,setup,&init_data->qib_param_field,sizeof(char*));
2744         QDIO_DBF_HEX0(0,setup,&init_data->input_slib_elements,sizeof(long*));
2745         QDIO_DBF_HEX0(0,setup,&init_data->output_slib_elements,sizeof(long*));
2746         sprintf(dbf_text,"miit%4x",init_data->min_input_threshold);
2747         QDIO_DBF_TEXT0(0,setup,dbf_text);
2748         sprintf(dbf_text,"mait%4x",init_data->max_input_threshold);
2749         QDIO_DBF_TEXT0(0,setup,dbf_text);
2750         sprintf(dbf_text,"miot%4x",init_data->min_output_threshold);
2751         QDIO_DBF_TEXT0(0,setup,dbf_text);
2752         sprintf(dbf_text,"maot%4x",init_data->max_output_threshold);
2753         QDIO_DBF_TEXT0(0,setup,dbf_text);
2754         sprintf(dbf_text,"niq:%4x",init_data->no_input_qs);
2755         QDIO_DBF_TEXT0(0,setup,dbf_text);
2756         sprintf(dbf_text,"noq:%4x",init_data->no_output_qs);
2757         QDIO_DBF_TEXT0(0,setup,dbf_text);
2758         QDIO_DBF_HEX0(0,setup,&init_data->input_handler,sizeof(void*));
2759         QDIO_DBF_HEX0(0,setup,&init_data->output_handler,sizeof(void*));
2760         QDIO_DBF_HEX0(0,setup,&init_data->int_parm,sizeof(long));
2761         QDIO_DBF_HEX0(0,setup,&init_data->flags,sizeof(long));
2762         QDIO_DBF_HEX0(0,setup,&init_data->input_sbal_addr_array,sizeof(void*));
2763         QDIO_DBF_HEX0(0,setup,&init_data->output_sbal_addr_array,sizeof(void*));
2764 }
2765
2766 static inline void
2767 qdio_allocate_fill_input_desc(struct qdio_irq *irq_ptr, int i, int iqfmt)
2768 {
2769         irq_ptr->input_qs[i]->is_iqdio_q = iqfmt;
2770         irq_ptr->input_qs[i]->is_thinint_q = irq_ptr->is_thinint_irq;
2771
2772         irq_ptr->qdr->qdf0[i].sliba=(unsigned long)(irq_ptr->input_qs[i]->slib);
2773
2774         irq_ptr->qdr->qdf0[i].sla=(unsigned long)(irq_ptr->input_qs[i]->sl);
2775
2776         irq_ptr->qdr->qdf0[i].slsba=
2777                 (unsigned long)(&irq_ptr->input_qs[i]->slsb.acc.val[0]);
2778
2779         irq_ptr->qdr->qdf0[i].akey=QDIO_STORAGE_KEY;
2780         irq_ptr->qdr->qdf0[i].bkey=QDIO_STORAGE_KEY;
2781         irq_ptr->qdr->qdf0[i].ckey=QDIO_STORAGE_KEY;
2782         irq_ptr->qdr->qdf0[i].dkey=QDIO_STORAGE_KEY;
2783 }
2784
2785 static inline void
2786 qdio_allocate_fill_output_desc(struct qdio_irq *irq_ptr, int i,
2787                                int j, int iqfmt)
2788 {
2789         irq_ptr->output_qs[i]->is_iqdio_q = iqfmt;
2790         irq_ptr->output_qs[i]->is_thinint_q = irq_ptr->is_thinint_irq;
2791
2792         irq_ptr->qdr->qdf0[i+j].sliba=(unsigned long)(irq_ptr->output_qs[i]->slib);
2793
2794         irq_ptr->qdr->qdf0[i+j].sla=(unsigned long)(irq_ptr->output_qs[i]->sl);
2795
2796         irq_ptr->qdr->qdf0[i+j].slsba=
2797                 (unsigned long)(&irq_ptr->output_qs[i]->slsb.acc.val[0]);
2798
2799         irq_ptr->qdr->qdf0[i+j].akey=QDIO_STORAGE_KEY;
2800         irq_ptr->qdr->qdf0[i+j].bkey=QDIO_STORAGE_KEY;
2801         irq_ptr->qdr->qdf0[i+j].ckey=QDIO_STORAGE_KEY;
2802         irq_ptr->qdr->qdf0[i+j].dkey=QDIO_STORAGE_KEY;
2803 }
2804
2805
2806 static inline void
2807 qdio_initialize_set_siga_flags_input(struct qdio_irq *irq_ptr)
2808 {
2809         int i;
2810
2811         for (i=0;i<irq_ptr->no_input_qs;i++) {
2812                 irq_ptr->input_qs[i]->siga_sync=
2813                         irq_ptr->qdioac&CHSC_FLAG_SIGA_SYNC_NECESSARY;
2814                 irq_ptr->input_qs[i]->siga_in=
2815                         irq_ptr->qdioac&CHSC_FLAG_SIGA_INPUT_NECESSARY;
2816                 irq_ptr->input_qs[i]->siga_out=
2817                         irq_ptr->qdioac&CHSC_FLAG_SIGA_OUTPUT_NECESSARY;
2818                 irq_ptr->input_qs[i]->siga_sync_done_on_thinints=
2819                         irq_ptr->qdioac&CHSC_FLAG_SIGA_SYNC_DONE_ON_THININTS;
2820                 irq_ptr->input_qs[i]->hydra_gives_outbound_pcis=
2821                         irq_ptr->hydra_gives_outbound_pcis;
2822                 irq_ptr->input_qs[i]->siga_sync_done_on_outb_tis=
2823                         ((irq_ptr->qdioac&
2824                           (CHSC_FLAG_SIGA_SYNC_DONE_ON_OUTB_PCIS|
2825                            CHSC_FLAG_SIGA_SYNC_DONE_ON_THININTS))==
2826                          (CHSC_FLAG_SIGA_SYNC_DONE_ON_OUTB_PCIS|
2827                           CHSC_FLAG_SIGA_SYNC_DONE_ON_THININTS));
2828
2829         }
2830 }
2831
2832 static inline void
2833 qdio_initialize_set_siga_flags_output(struct qdio_irq *irq_ptr)
2834 {
2835         int i;
2836
2837         for (i=0;i<irq_ptr->no_output_qs;i++) {
2838                 irq_ptr->output_qs[i]->siga_sync=
2839                         irq_ptr->qdioac&CHSC_FLAG_SIGA_SYNC_NECESSARY;
2840                 irq_ptr->output_qs[i]->siga_in=
2841                         irq_ptr->qdioac&CHSC_FLAG_SIGA_INPUT_NECESSARY;
2842                 irq_ptr->output_qs[i]->siga_out=
2843                         irq_ptr->qdioac&CHSC_FLAG_SIGA_OUTPUT_NECESSARY;
2844                 irq_ptr->output_qs[i]->siga_sync_done_on_thinints=
2845                         irq_ptr->qdioac&CHSC_FLAG_SIGA_SYNC_DONE_ON_THININTS;
2846                 irq_ptr->output_qs[i]->hydra_gives_outbound_pcis=
2847                         irq_ptr->hydra_gives_outbound_pcis;
2848                 irq_ptr->output_qs[i]->siga_sync_done_on_outb_tis=
2849                         ((irq_ptr->qdioac&
2850                           (CHSC_FLAG_SIGA_SYNC_DONE_ON_OUTB_PCIS|
2851                            CHSC_FLAG_SIGA_SYNC_DONE_ON_THININTS))==
2852                          (CHSC_FLAG_SIGA_SYNC_DONE_ON_OUTB_PCIS|
2853                           CHSC_FLAG_SIGA_SYNC_DONE_ON_THININTS));
2854
2855         }
2856 }
2857
2858 static inline int
2859 qdio_establish_irq_check_for_errors(struct ccw_device *cdev, int cstat,
2860                                     int dstat)
2861 {
2862         char dbf_text[15];
2863         struct qdio_irq *irq_ptr;
2864
2865         irq_ptr = cdev->private->qdio_data;
2866
2867         if (cstat || (dstat & ~(DEV_STAT_CHN_END|DEV_STAT_DEV_END))) {
2868                 sprintf(dbf_text,"ick1%4x",irq_ptr->schid.sch_no);
2869                 QDIO_DBF_TEXT2(1,trace,dbf_text);
2870                 QDIO_DBF_HEX2(0,trace,&dstat,sizeof(int));
2871                 QDIO_DBF_HEX2(0,trace,&cstat,sizeof(int));
2872                 QDIO_PRINT_ERR("received check condition on establish " \
2873                                "queues on irq 0x%x (cs=x%x, ds=x%x).\n",
2874                                irq_ptr->schid.sch_no,cstat,dstat);
2875                 qdio_set_state(irq_ptr,QDIO_IRQ_STATE_ERR);
2876         }
2877
2878         if (!(dstat & DEV_STAT_DEV_END)) {
2879                 QDIO_DBF_TEXT2(1,setup,"eq:no de");
2880                 QDIO_DBF_HEX2(0,setup,&dstat, sizeof(dstat));
2881                 QDIO_DBF_HEX2(0,setup,&cstat, sizeof(cstat));
2882                 QDIO_PRINT_ERR("establish queues on irq %04x: didn't get "
2883                                "device end: dstat=%02x, cstat=%02x\n",
2884                                irq_ptr->schid.sch_no, dstat, cstat);
2885                 qdio_set_state(irq_ptr, QDIO_IRQ_STATE_ERR);
2886                 return 1;
2887         }
2888
2889         if (dstat & ~(DEV_STAT_CHN_END|DEV_STAT_DEV_END)) {
2890                 QDIO_DBF_TEXT2(1,setup,"eq:badio");
2891                 QDIO_DBF_HEX2(0,setup,&dstat, sizeof(dstat));
2892                 QDIO_DBF_HEX2(0,setup,&cstat, sizeof(cstat));
2893                 QDIO_PRINT_ERR("establish queues on irq %04x: got "
2894                                "the following devstat: dstat=%02x, "
2895                                "cstat=%02x\n",
2896                                irq_ptr->schid.sch_no, dstat, cstat);
2897                 qdio_set_state(irq_ptr, QDIO_IRQ_STATE_ERR);
2898                 return 1;
2899         }
2900         return 0;
2901 }
2902
2903 static void
2904 qdio_establish_handle_irq(struct ccw_device *cdev, int cstat, int dstat)
2905 {
2906         struct qdio_irq *irq_ptr;
2907         char dbf_text[15];
2908
2909         irq_ptr = cdev->private->qdio_data;
2910
2911         sprintf(dbf_text,"qehi%4x",cdev->private->sch_no);
2912         QDIO_DBF_TEXT0(0,setup,dbf_text);
2913         QDIO_DBF_TEXT0(0,trace,dbf_text);
2914
2915         if (qdio_establish_irq_check_for_errors(cdev, cstat, dstat)) {
2916                 ccw_device_set_timeout(cdev, 0);
2917                 return;
2918         }
2919
2920         qdio_set_state(irq_ptr,QDIO_IRQ_STATE_ESTABLISHED);
2921         ccw_device_set_timeout(cdev, 0);
2922 }
2923
2924 int
2925 qdio_initialize(struct qdio_initialize *init_data)
2926 {
2927         int rc;
2928         char dbf_text[15];
2929
2930         sprintf(dbf_text,"qini%4x",init_data->cdev->private->sch_no);
2931         QDIO_DBF_TEXT0(0,setup,dbf_text);
2932         QDIO_DBF_TEXT0(0,trace,dbf_text);
2933
2934         rc = qdio_allocate(init_data);
2935         if (rc == 0) {
2936                 rc = qdio_establish(init_data);
2937                 if (rc != 0)
2938                         qdio_free(init_data->cdev);
2939         }
2940
2941         return rc;
2942 }
2943
2944
2945 int
2946 qdio_allocate(struct qdio_initialize *init_data)
2947 {
2948         struct qdio_irq *irq_ptr;
2949         char dbf_text[15];
2950
2951         sprintf(dbf_text,"qalc%4x",init_data->cdev->private->sch_no);
2952         QDIO_DBF_TEXT0(0,setup,dbf_text);
2953         QDIO_DBF_TEXT0(0,trace,dbf_text);
2954         if ( (init_data->no_input_qs>QDIO_MAX_QUEUES_PER_IRQ) ||
2955              (init_data->no_output_qs>QDIO_MAX_QUEUES_PER_IRQ) ||
2956              ((init_data->no_input_qs) && (!init_data->input_handler)) ||
2957              ((init_data->no_output_qs) && (!init_data->output_handler)) )
2958                 return -EINVAL;
2959
2960         if (!init_data->input_sbal_addr_array)
2961                 return -EINVAL;
2962
2963         if (!init_data->output_sbal_addr_array)
2964                 return -EINVAL;
2965
2966         qdio_allocate_do_dbf(init_data);
2967
2968         /* create irq */
2969         irq_ptr=kmalloc(sizeof(struct qdio_irq), GFP_KERNEL | GFP_DMA);
2970
2971         QDIO_DBF_TEXT0(0,setup,"irq_ptr:");
2972         QDIO_DBF_HEX0(0,setup,&irq_ptr,sizeof(void*));
2973
2974         if (!irq_ptr) {
2975                 QDIO_PRINT_ERR("kmalloc of irq_ptr failed!\n");
2976                 return -ENOMEM;
2977         }
2978
2979         memset(irq_ptr,0,sizeof(struct qdio_irq));
2980
2981         init_MUTEX(&irq_ptr->setting_up_sema);
2982
2983         /* QDR must be in DMA area since CCW data address is only 32 bit */
2984         irq_ptr->qdr=kmalloc(sizeof(struct qdr), GFP_KERNEL | GFP_DMA);
2985         if (!(irq_ptr->qdr)) {
2986                 kfree(irq_ptr);
2987                 QDIO_PRINT_ERR("kmalloc of irq_ptr->qdr failed!\n");
2988                 return -ENOMEM;
2989         }
2990         QDIO_DBF_TEXT0(0,setup,"qdr:");
2991         QDIO_DBF_HEX0(0,setup,&irq_ptr->qdr,sizeof(void*));
2992
2993         if (qdio_alloc_qs(irq_ptr,
2994                           init_data->no_input_qs,
2995                           init_data->no_output_qs)) {
2996                 qdio_release_irq_memory(irq_ptr);
2997                 return -ENOMEM;
2998         }
2999
3000         init_data->cdev->private->qdio_data = irq_ptr;
3001
3002         qdio_set_state(irq_ptr,QDIO_IRQ_STATE_INACTIVE);
3003
3004         return 0;
3005 }
3006
3007 int qdio_fill_irq(struct qdio_initialize *init_data)
3008 {
3009         int i;
3010         char dbf_text[15];
3011         struct ciw *ciw;
3012         int is_iqdio;
3013         struct qdio_irq *irq_ptr;
3014
3015         irq_ptr = init_data->cdev->private->qdio_data;
3016
3017         memset(irq_ptr,0,((char*)&irq_ptr->qdr)-((char*)irq_ptr));
3018
3019         /* wipes qib.ac, required by ar7063 */
3020         memset(irq_ptr->qdr,0,sizeof(struct qdr));
3021
3022         irq_ptr->int_parm=init_data->int_parm;
3023
3024         irq_ptr->schid = ccw_device_get_subchannel_id(init_data->cdev);
3025         irq_ptr->no_input_qs=init_data->no_input_qs;
3026         irq_ptr->no_output_qs=init_data->no_output_qs;
3027
3028         if (init_data->q_format==QDIO_IQDIO_QFMT) {
3029                 irq_ptr->is_iqdio_irq=1;
3030                 irq_ptr->is_thinint_irq=1;
3031         } else {
3032                 irq_ptr->is_iqdio_irq=0;
3033                 irq_ptr->is_thinint_irq=hydra_thinints;
3034         }
3035         sprintf(dbf_text,"is_i_t%1x%1x",
3036                 irq_ptr->is_iqdio_irq,irq_ptr->is_thinint_irq);
3037         QDIO_DBF_TEXT2(0,setup,dbf_text);
3038
3039         if (irq_ptr->is_thinint_irq) {
3040                 irq_ptr->dev_st_chg_ind = qdio_get_indicator();
3041                 QDIO_DBF_HEX1(0,setup,&irq_ptr->dev_st_chg_ind,sizeof(void*));
3042                 if (!irq_ptr->dev_st_chg_ind) {
3043                         QDIO_PRINT_WARN("no indicator location available " \
3044                                         "for irq 0x%x\n",irq_ptr->schid.sch_no);
3045                         qdio_release_irq_memory(irq_ptr);
3046                         return -ENOBUFS;
3047                 }
3048         }
3049
3050         /* defaults */
3051         irq_ptr->equeue.cmd=DEFAULT_ESTABLISH_QS_CMD;
3052         irq_ptr->equeue.count=DEFAULT_ESTABLISH_QS_COUNT;
3053         irq_ptr->aqueue.cmd=DEFAULT_ACTIVATE_QS_CMD;
3054         irq_ptr->aqueue.count=DEFAULT_ACTIVATE_QS_COUNT;
3055
3056         qdio_fill_qs(irq_ptr, init_data->cdev,
3057                      init_data->no_input_qs,
3058                      init_data->no_output_qs,
3059                      init_data->input_handler,
3060                      init_data->output_handler,init_data->int_parm,
3061                      init_data->q_format,init_data->flags,
3062                      init_data->input_sbal_addr_array,
3063                      init_data->output_sbal_addr_array);
3064
3065         if (!try_module_get(THIS_MODULE)) {
3066                 QDIO_PRINT_CRIT("try_module_get() failed!\n");
3067                 qdio_release_irq_memory(irq_ptr);
3068                 return -EINVAL;
3069         }
3070
3071         qdio_fill_thresholds(irq_ptr,init_data->no_input_qs,
3072                              init_data->no_output_qs,
3073                              init_data->min_input_threshold,
3074                              init_data->max_input_threshold,
3075                              init_data->min_output_threshold,
3076                              init_data->max_output_threshold);
3077
3078         /* fill in qdr */
3079         irq_ptr->qdr->qfmt=init_data->q_format;
3080         irq_ptr->qdr->iqdcnt=init_data->no_input_qs;
3081         irq_ptr->qdr->oqdcnt=init_data->no_output_qs;
3082         irq_ptr->qdr->iqdsz=sizeof(struct qdesfmt0)/4; /* size in words */
3083         irq_ptr->qdr->oqdsz=sizeof(struct qdesfmt0)/4;
3084
3085         irq_ptr->qdr->qiba=(unsigned long)&irq_ptr->qib;
3086         irq_ptr->qdr->qkey=QDIO_STORAGE_KEY;
3087
3088         /* fill in qib */
3089         irq_ptr->is_qebsm = is_passthrough;
3090         if (irq_ptr->is_qebsm)
3091                 irq_ptr->qib.rflags |= QIB_RFLAGS_ENABLE_QEBSM;
3092
3093         irq_ptr->qib.qfmt=init_data->q_format;
3094         if (init_data->no_input_qs)
3095                 irq_ptr->qib.isliba=(unsigned long)(irq_ptr->input_qs[0]->slib);
3096         if (init_data->no_output_qs)
3097                 irq_ptr->qib.osliba=(unsigned long)(irq_ptr->output_qs[0]->slib);
3098         memcpy(irq_ptr->qib.ebcnam,init_data->adapter_name,8);
3099
3100         qdio_set_impl_params(irq_ptr,init_data->qib_param_field_format,
3101                              init_data->qib_param_field,
3102                              init_data->no_input_qs,
3103                              init_data->no_output_qs,
3104                              init_data->input_slib_elements,
3105                              init_data->output_slib_elements);
3106
3107         /* first input descriptors, then output descriptors */
3108         is_iqdio = (init_data->q_format == QDIO_IQDIO_QFMT) ? 1 : 0;
3109         for (i=0;i<init_data->no_input_qs;i++)
3110                 qdio_allocate_fill_input_desc(irq_ptr, i, is_iqdio);
3111
3112         for (i=0;i<init_data->no_output_qs;i++)
3113                 qdio_allocate_fill_output_desc(irq_ptr, i,
3114                                                init_data->no_input_qs,
3115                                                is_iqdio);
3116
3117         /* qdr, qib, sls, slsbs, slibs, sbales filled. */
3118
3119         /* get qdio commands */
3120         ciw = ccw_device_get_ciw(init_data->cdev, CIW_TYPE_EQUEUE);
3121         if (!ciw) {
3122                 QDIO_DBF_TEXT2(1,setup,"no eq");
3123                 QDIO_PRINT_INFO("No equeue CIW found for QDIO commands. "
3124                                 "Trying to use default.\n");
3125         } else
3126                 irq_ptr->equeue = *ciw;
3127         ciw = ccw_device_get_ciw(init_data->cdev, CIW_TYPE_AQUEUE);
3128         if (!ciw) {
3129                 QDIO_DBF_TEXT2(1,setup,"no aq");
3130                 QDIO_PRINT_INFO("No aqueue CIW found for QDIO commands. "
3131                                 "Trying to use default.\n");
3132         } else
3133                 irq_ptr->aqueue = *ciw;
3134
3135         /* Set new interrupt handler. */
3136         irq_ptr->original_int_handler = init_data->cdev->handler;
3137         init_data->cdev->handler = qdio_handler;
3138
3139         return 0;
3140 }
3141
3142 int
3143 qdio_establish(struct qdio_initialize *init_data)
3144 {
3145         struct qdio_irq *irq_ptr;
3146         unsigned long saveflags;
3147         int result, result2;
3148         struct ccw_device *cdev;
3149         char dbf_text[20];
3150
3151         cdev=init_data->cdev;
3152         irq_ptr = cdev->private->qdio_data;
3153         if (!irq_ptr)
3154                 return -EINVAL;
3155
3156         if (cdev->private->state != DEV_STATE_ONLINE)
3157                 return -EINVAL;
3158
3159         down(&irq_ptr->setting_up_sema);
3160
3161         qdio_fill_irq(init_data);
3162
3163         /* the thinint CHSC stuff */
3164         if (irq_ptr->is_thinint_irq) {
3165
3166                 result = tiqdio_set_subchannel_ind(irq_ptr,0);
3167                 if (result) {
3168                         up(&irq_ptr->setting_up_sema);
3169                         qdio_shutdown(cdev, QDIO_FLAG_CLEANUP_USING_CLEAR);
3170                         return result;
3171                 }
3172                 tiqdio_set_delay_target(irq_ptr,TIQDIO_DELAY_TARGET);
3173         }
3174
3175         sprintf(dbf_text,"qest%4x",cdev->private->sch_no);
3176         QDIO_DBF_TEXT0(0,setup,dbf_text);
3177         QDIO_DBF_TEXT0(0,trace,dbf_text);
3178
3179         /* establish q */
3180         irq_ptr->ccw.cmd_code=irq_ptr->equeue.cmd;
3181         irq_ptr->ccw.flags=CCW_FLAG_SLI;
3182         irq_ptr->ccw.count=irq_ptr->equeue.count;
3183         irq_ptr->ccw.cda=QDIO_GET_ADDR(irq_ptr->qdr);
3184
3185         spin_lock_irqsave(get_ccwdev_lock(cdev),saveflags);
3186
3187         ccw_device_set_options(cdev, 0);
3188         result=ccw_device_start_timeout(cdev,&irq_ptr->ccw,
3189                                         QDIO_DOING_ESTABLISH,0, 0,
3190                                         QDIO_ESTABLISH_TIMEOUT);
3191         if (result) {
3192                 result2=ccw_device_start_timeout(cdev,&irq_ptr->ccw,
3193                                                  QDIO_DOING_ESTABLISH,0,0,
3194                                                  QDIO_ESTABLISH_TIMEOUT);
3195                 sprintf(dbf_text,"eq:io%4x",result);
3196                 QDIO_DBF_TEXT2(1,setup,dbf_text);
3197                 if (result2) {
3198                         sprintf(dbf_text,"eq:io%4x",result);
3199                         QDIO_DBF_TEXT2(1,setup,dbf_text);
3200                 }
3201                 QDIO_PRINT_WARN("establish queues on irq %04x: do_IO " \
3202                            "returned %i, next try returned %i\n",
3203                            irq_ptr->schid.sch_no,result,result2);
3204                 result=result2;
3205                 if (result)
3206                         ccw_device_set_timeout(cdev, 0);
3207         }
3208
3209         spin_unlock_irqrestore(get_ccwdev_lock(cdev),saveflags);
3210
3211         if (result) {
3212                 up(&irq_ptr->setting_up_sema);
3213                 qdio_shutdown(cdev,QDIO_FLAG_CLEANUP_USING_CLEAR);
3214                 return result;
3215         }
3216
3217         /* Timeout is cared for already by using ccw_device_start_timeout(). */
3218         wait_event_interruptible(cdev->private->wait_q,
3219                  irq_ptr->state == QDIO_IRQ_STATE_ESTABLISHED ||
3220                  irq_ptr->state == QDIO_IRQ_STATE_ERR);
3221
3222         if (irq_ptr->state == QDIO_IRQ_STATE_ESTABLISHED)
3223                 result = 0;
3224         else {
3225                 up(&irq_ptr->setting_up_sema);
3226                 qdio_shutdown(cdev, QDIO_FLAG_CLEANUP_USING_CLEAR);
3227                 return -EIO;
3228         }
3229
3230         qdio_get_ssqd_information(irq_ptr);
3231         /* if this gets set once, we're running under VM and can omit SVSes */
3232         if (irq_ptr->qdioac&CHSC_FLAG_SIGA_SYNC_NECESSARY)
3233                 omit_svs=1;
3234
3235         sprintf(dbf_text,"qdioac%2x",irq_ptr->qdioac);
3236         QDIO_DBF_TEXT2(0,setup,dbf_text);
3237
3238         sprintf(dbf_text,"qib ac%2x",irq_ptr->qib.ac);
3239         QDIO_DBF_TEXT2(0,setup,dbf_text);
3240
3241         irq_ptr->hydra_gives_outbound_pcis=
3242                 irq_ptr->qib.ac&QIB_AC_OUTBOUND_PCI_SUPPORTED;
3243         irq_ptr->sync_done_on_outb_pcis=
3244                 irq_ptr->qdioac&CHSC_FLAG_SIGA_SYNC_DONE_ON_OUTB_PCIS;
3245
3246         qdio_initialize_set_siga_flags_input(irq_ptr);
3247         qdio_initialize_set_siga_flags_output(irq_ptr);
3248
3249         up(&irq_ptr->setting_up_sema);
3250
3251         return result;
3252
3253 }
3254
3255 int
3256 qdio_activate(struct ccw_device *cdev, int flags)
3257 {
3258         struct qdio_irq *irq_ptr;
3259         int i,result=0,result2;
3260         unsigned long saveflags;
3261         char dbf_text[20]; /* see qdio_initialize */
3262
3263         irq_ptr = cdev->private->qdio_data;
3264         if (!irq_ptr)
3265                 return -ENODEV;
3266
3267         if (cdev->private->state != DEV_STATE_ONLINE)
3268                 return -EINVAL;
3269
3270         down(&irq_ptr->setting_up_sema);
3271         if (irq_ptr->state==QDIO_IRQ_STATE_INACTIVE) {
3272                 result=-EBUSY;
3273                 goto out;
3274         }
3275
3276         sprintf(dbf_text,"qact%4x", irq_ptr->schid.sch_no);
3277         QDIO_DBF_TEXT2(0,setup,dbf_text);
3278         QDIO_DBF_TEXT2(0,trace,dbf_text);
3279
3280         /* activate q */
3281         irq_ptr->ccw.cmd_code=irq_ptr->aqueue.cmd;
3282         irq_ptr->ccw.flags=CCW_FLAG_SLI;
3283         irq_ptr->ccw.count=irq_ptr->aqueue.count;
3284         irq_ptr->ccw.cda=QDIO_GET_ADDR(0);
3285
3286         spin_lock_irqsave(get_ccwdev_lock(cdev),saveflags);
3287
3288         ccw_device_set_timeout(cdev, 0);
3289         ccw_device_set_options(cdev, CCWDEV_REPORT_ALL);
3290         result=ccw_device_start(cdev,&irq_ptr->ccw,QDIO_DOING_ACTIVATE,
3291                                 0, DOIO_DENY_PREFETCH);
3292         if (result) {
3293                 result2=ccw_device_start(cdev,&irq_ptr->ccw,
3294                                          QDIO_DOING_ACTIVATE,0,0);
3295                 sprintf(dbf_text,"aq:io%4x",result);
3296                 QDIO_DBF_TEXT2(1,setup,dbf_text);
3297                 if (result2) {
3298                         sprintf(dbf_text,"aq:io%4x",result);
3299                         QDIO_DBF_TEXT2(1,setup,dbf_text);
3300                 }
3301                 QDIO_PRINT_WARN("activate queues on irq %04x: do_IO " \
3302                            "returned %i, next try returned %i\n",
3303                            irq_ptr->schid.sch_no,result,result2);
3304                 result=result2;
3305         }
3306
3307         spin_unlock_irqrestore(get_ccwdev_lock(cdev),saveflags);
3308         if (result)
3309                 goto out;
3310
3311         for (i=0;i<irq_ptr->no_input_qs;i++) {
3312                 if (irq_ptr->is_thinint_irq) {
3313                         /*
3314                          * that way we know, that, if we will get interrupted
3315                          * by tiqdio_inbound_processing, qdio_unmark_q will
3316                          * not be called
3317                          */
3318                         qdio_reserve_q(irq_ptr->input_qs[i]);
3319                         qdio_mark_tiq(irq_ptr->input_qs[i]);
3320                         qdio_release_q(irq_ptr->input_qs[i]);
3321                 }
3322         }
3323
3324         if (flags&QDIO_FLAG_NO_INPUT_INTERRUPT_CONTEXT) {
3325                 for (i=0;i<irq_ptr->no_input_qs;i++) {
3326                         irq_ptr->input_qs[i]->is_input_q|=
3327                                 QDIO_FLAG_NO_INPUT_INTERRUPT_CONTEXT;
3328                 }
3329         }
3330
3331         wait_event_interruptible_timeout(cdev->private->wait_q,
3332                                          ((irq_ptr->state ==
3333                                           QDIO_IRQ_STATE_STOPPED) ||
3334                                           (irq_ptr->state ==
3335                                            QDIO_IRQ_STATE_ERR)),
3336                                          QDIO_ACTIVATE_TIMEOUT);
3337
3338         switch (irq_ptr->state) {
3339         case QDIO_IRQ_STATE_STOPPED:
3340         case QDIO_IRQ_STATE_ERR:
3341                 up(&irq_ptr->setting_up_sema);
3342                 qdio_shutdown(cdev, QDIO_FLAG_CLEANUP_USING_CLEAR);
3343                 down(&irq_ptr->setting_up_sema);
3344                 result = -EIO;
3345                 break;
3346         default:
3347                 qdio_set_state(irq_ptr, QDIO_IRQ_STATE_ACTIVE);
3348                 result = 0;
3349         }
3350  out:
3351         up(&irq_ptr->setting_up_sema);
3352
3353         return result;
3354 }
3355
3356 /* buffers filled forwards again to make Rick happy */
3357 static inline void
3358 qdio_do_qdio_fill_input(struct qdio_q *q, unsigned int qidx,
3359                         unsigned int count, struct qdio_buffer *buffers)
3360 {
3361         struct qdio_irq *irq = (struct qdio_irq *) q->irq_ptr;
3362         qidx &= (QDIO_MAX_BUFFERS_PER_Q - 1);
3363         if (irq->is_qebsm) {
3364                 while (count)
3365                         set_slsb(q, &qidx, SLSB_CU_INPUT_EMPTY, &count);
3366                 return;
3367         }
3368         for (;;) {
3369                 set_slsb(q, &qidx, SLSB_CU_INPUT_EMPTY, &count);
3370                 count--;
3371                 if (!count) break;
3372                 qidx = (qidx + 1) & (QDIO_MAX_BUFFERS_PER_Q - 1);
3373         }
3374 }
3375
3376 static inline void
3377 qdio_do_qdio_fill_output(struct qdio_q *q, unsigned int qidx,
3378                          unsigned int count, struct qdio_buffer *buffers)
3379 {
3380         struct qdio_irq *irq = (struct qdio_irq *) q->irq_ptr;
3381
3382         qidx &= (QDIO_MAX_BUFFERS_PER_Q - 1);
3383         if (irq->is_qebsm) {
3384                 while (count)
3385                         set_slsb(q, &qidx, SLSB_CU_OUTPUT_PRIMED, &count);
3386                 return;
3387         }
3388
3389         for (;;) {
3390                 set_slsb(q, &qidx, SLSB_CU_OUTPUT_PRIMED, &count);
3391                 count--;
3392                 if (!count) break;
3393                 qidx = (qidx + 1) & (QDIO_MAX_BUFFERS_PER_Q - 1);
3394         }
3395 }
3396
3397 static inline void
3398 do_qdio_handle_inbound(struct qdio_q *q, unsigned int callflags,
3399                        unsigned int qidx, unsigned int count,
3400                        struct qdio_buffer *buffers)
3401 {
3402         int used_elements;
3403
3404         /* This is the inbound handling of queues */
3405         used_elements=atomic_add_return(count, &q->number_of_buffers_used) - count;
3406
3407         qdio_do_qdio_fill_input(q,qidx,count,buffers);
3408
3409         if ((used_elements+count==QDIO_MAX_BUFFERS_PER_Q)&&
3410             (callflags&QDIO_FLAG_UNDER_INTERRUPT))
3411                 atomic_swap(&q->polling,0);
3412
3413         if (used_elements)
3414                 return;
3415         if (callflags&QDIO_FLAG_DONT_SIGA)
3416                 return;
3417         if (q->siga_in) {
3418                 int result;
3419
3420                 result=qdio_siga_input(q);
3421                 if (result) {
3422                         if (q->siga_error)
3423                                 q->error_status_flags|=
3424                                         QDIO_STATUS_MORE_THAN_ONE_SIGA_ERROR;
3425                         q->error_status_flags|=QDIO_STATUS_LOOK_FOR_ERROR;
3426                         q->siga_error=result;
3427                 }
3428         }
3429
3430         qdio_mark_q(q);
3431 }
3432
3433 static inline void
3434 do_qdio_handle_outbound(struct qdio_q *q, unsigned int callflags,
3435                         unsigned int qidx, unsigned int count,
3436                         struct qdio_buffer *buffers)
3437 {
3438         int used_elements;
3439         unsigned int cnt, start_buf;
3440         unsigned char state = 0;
3441         struct qdio_irq *irq = (struct qdio_irq *) q->irq_ptr;
3442
3443         /* This is the outbound handling of queues */
3444 #ifdef QDIO_PERFORMANCE_STATS
3445         perf_stats.start_time_outbound=NOW;
3446 #endif /* QDIO_PERFORMANCE_STATS */
3447
3448         qdio_do_qdio_fill_output(q,qidx,count,buffers);
3449
3450         used_elements=atomic_add_return(count, &q->number_of_buffers_used) - count;
3451
3452         if (callflags&QDIO_FLAG_DONT_SIGA) {
3453 #ifdef QDIO_PERFORMANCE_STATS
3454                 perf_stats.outbound_time+=NOW-perf_stats.start_time_outbound;
3455                 perf_stats.outbound_cnt++;
3456 #endif /* QDIO_PERFORMANCE_STATS */
3457                 return;
3458         }
3459         if (q->is_iqdio_q) {
3460                 /* one siga for every sbal */
3461                 while (count--)
3462                         qdio_kick_outbound_q(q);
3463
3464                 __qdio_outbound_processing(q);
3465         } else {
3466                 /* under VM, we do a SIGA sync unconditionally */
3467                 SYNC_MEMORY;
3468                 else {
3469                         /*
3470                          * w/o shadow queues (else branch of
3471                          * SYNC_MEMORY :-/ ), we try to
3472                          * fast-requeue buffers
3473                          */
3474                         if (irq->is_qebsm) {
3475                                 cnt = 1;
3476                                 start_buf = ((qidx+QDIO_MAX_BUFFERS_PER_Q-1) &
3477                                              (QDIO_MAX_BUFFERS_PER_Q-1));
3478                                 qdio_do_eqbs(q, &state, &start_buf, &cnt);
3479                         } else
3480                                 state = q->slsb.acc.val[(qidx+QDIO_MAX_BUFFERS_PER_Q-1)
3481                                         &(QDIO_MAX_BUFFERS_PER_Q-1) ];
3482                          if (state != SLSB_CU_OUTPUT_PRIMED) {
3483                                 qdio_kick_outbound_q(q);
3484                         } else {
3485                                 QDIO_DBF_TEXT3(0,trace, "fast-req");
3486 #ifdef QDIO_PERFORMANCE_STATS
3487                                 perf_stats.fast_reqs++;
3488 #endif /* QDIO_PERFORMANCE_STATS */
3489                         }
3490                 }
3491                 /*
3492                  * only marking the q could take too long,
3493                  * the upper layer module could do a lot of
3494                  * traffic in that time
3495                  */
3496                 __qdio_outbound_processing(q);
3497         }
3498
3499 #ifdef QDIO_PERFORMANCE_STATS
3500         perf_stats.outbound_time+=NOW-perf_stats.start_time_outbound;
3501         perf_stats.outbound_cnt++;
3502 #endif /* QDIO_PERFORMANCE_STATS */
3503 }
3504
3505 /* count must be 1 in iqdio */
3506 int
3507 do_QDIO(struct ccw_device *cdev,unsigned int callflags,
3508         unsigned int queue_number, unsigned int qidx,
3509         unsigned int count,struct qdio_buffer *buffers)
3510 {
3511         struct qdio_irq *irq_ptr;
3512 #ifdef CONFIG_QDIO_DEBUG
3513         char dbf_text[20];
3514
3515         sprintf(dbf_text,"doQD%04x",cdev->private->sch_no);
3516         QDIO_DBF_TEXT3(0,trace,dbf_text);
3517 #endif /* CONFIG_QDIO_DEBUG */
3518
3519         if ( (qidx>QDIO_MAX_BUFFERS_PER_Q) ||
3520              (count>QDIO_MAX_BUFFERS_PER_Q) ||
3521              (queue_number>QDIO_MAX_QUEUES_PER_IRQ) )
3522                 return -EINVAL;
3523
3524         if (count==0)
3525                 return 0;
3526
3527         irq_ptr = cdev->private->qdio_data;
3528         if (!irq_ptr)
3529                 return -ENODEV;
3530
3531 #ifdef CONFIG_QDIO_DEBUG
3532         if (callflags&QDIO_FLAG_SYNC_INPUT)
3533                 QDIO_DBF_HEX3(0,trace,&irq_ptr->input_qs[queue_number],
3534                               sizeof(void*));
3535         else
3536                 QDIO_DBF_HEX3(0,trace,&irq_ptr->output_qs[queue_number],
3537                               sizeof(void*));
3538         sprintf(dbf_text,"flag%04x",callflags);
3539         QDIO_DBF_TEXT3(0,trace,dbf_text);
3540         sprintf(dbf_text,"qi%02xct%02x",qidx,count);
3541         QDIO_DBF_TEXT3(0,trace,dbf_text);
3542 #endif /* CONFIG_QDIO_DEBUG */
3543
3544         if (irq_ptr->state!=QDIO_IRQ_STATE_ACTIVE)
3545                 return -EBUSY;
3546
3547         if (callflags&QDIO_FLAG_SYNC_INPUT)
3548                 do_qdio_handle_inbound(irq_ptr->input_qs[queue_number],
3549                                        callflags, qidx, count, buffers);
3550         else if (callflags&QDIO_FLAG_SYNC_OUTPUT)
3551                 do_qdio_handle_outbound(irq_ptr->output_qs[queue_number],
3552                                         callflags, qidx, count, buffers);
3553         else {
3554                 QDIO_DBF_TEXT3(1,trace,"doQD:inv");
3555                 return -EINVAL;
3556         }
3557         return 0;
3558 }
3559
3560 #ifdef QDIO_PERFORMANCE_STATS
3561 static int
3562 qdio_perf_procfile_read(char *buffer, char **buffer_location, off_t offset,
3563                         int buffer_length, int *eof, void *data)
3564 {
3565         int c=0;
3566
3567         /* we are always called with buffer_length=4k, so we all
3568            deliver on the first read */
3569         if (offset>0)
3570                 return 0;
3571
3572 #define _OUTP_IT(x...) c+=sprintf(buffer+c,x)
3573         _OUTP_IT("i_p_nc/c=%lu/%lu\n",i_p_nc,i_p_c);
3574         _OUTP_IT("ii_p_nc/c=%lu/%lu\n",ii_p_nc,ii_p_c);
3575         _OUTP_IT("o_p_nc/c=%lu/%lu\n",o_p_nc,o_p_c);
3576         _OUTP_IT("Number of tasklet runs (total)                  : %u\n",
3577                  perf_stats.tl_runs);
3578         _OUTP_IT("\n");
3579         _OUTP_IT("Number of SIGA sync's issued                    : %u\n",
3580                  perf_stats.siga_syncs);
3581         _OUTP_IT("Number of SIGA in's issued                      : %u\n",
3582                  perf_stats.siga_ins);
3583         _OUTP_IT("Number of SIGA out's issued                     : %u\n",
3584                  perf_stats.siga_outs);
3585         _OUTP_IT("Number of PCIs caught                           : %u\n",
3586                  perf_stats.pcis);
3587         _OUTP_IT("Number of adapter interrupts caught             : %u\n",
3588                  perf_stats.thinints);
3589         _OUTP_IT("Number of fast requeues (outg. SBALs w/o SIGA)  : %u\n",
3590                  perf_stats.fast_reqs);
3591         _OUTP_IT("\n");
3592         _OUTP_IT("Total time of all inbound actions (us) incl. UL : %u\n",
3593                  perf_stats.inbound_time);
3594         _OUTP_IT("Number of inbound transfers                     : %u\n",
3595                  perf_stats.inbound_cnt);
3596         _OUTP_IT("Total time of all outbound do_QDIOs (us)        : %u\n",
3597                  perf_stats.outbound_time);
3598         _OUTP_IT("Number of do_QDIOs outbound                     : %u\n",
3599                  perf_stats.outbound_cnt);
3600         _OUTP_IT("\n");
3601
3602         return c;
3603 }
3604
3605 static struct proc_dir_entry *qdio_perf_proc_file;
3606 #endif /* QDIO_PERFORMANCE_STATS */
3607
3608 static void
3609 qdio_add_procfs_entry(void)
3610 {
3611 #ifdef QDIO_PERFORMANCE_STATS
3612         proc_perf_file_registration=0;
3613         qdio_perf_proc_file=create_proc_entry(QDIO_PERF,
3614                                               S_IFREG|0444,&proc_root);
3615         if (qdio_perf_proc_file) {
3616                 qdio_perf_proc_file->read_proc=&qdio_perf_procfile_read;
3617         } else proc_perf_file_registration=-1;
3618
3619         if (proc_perf_file_registration)
3620                 QDIO_PRINT_WARN("was not able to register perf. " \
3621                                 "proc-file (%i).\n",
3622                                 proc_perf_file_registration);
3623 #endif /* QDIO_PERFORMANCE_STATS */
3624 }
3625
3626 static void
3627 qdio_remove_procfs_entry(void)
3628 {
3629 #ifdef QDIO_PERFORMANCE_STATS
3630         perf_stats.tl_runs=0;
3631
3632         if (!proc_perf_file_registration) /* means if it went ok earlier */
3633                 remove_proc_entry(QDIO_PERF,&proc_root);
3634 #endif /* QDIO_PERFORMANCE_STATS */
3635 }
3636
3637 static void
3638 tiqdio_register_thinints(void)
3639 {
3640         char dbf_text[20];
3641         register_thinint_result=
3642                 s390_register_adapter_interrupt(&tiqdio_thinint_handler);
3643         if (register_thinint_result) {
3644                 sprintf(dbf_text,"regthn%x",(register_thinint_result&0xff));
3645                 QDIO_DBF_TEXT0(0,setup,dbf_text);
3646                 QDIO_PRINT_ERR("failed to register adapter handler " \
3647                                "(rc=%i).\nAdapter interrupts might " \
3648                                "not work. Continuing.\n",
3649                                register_thinint_result);
3650         }
3651 }
3652
3653 static void
3654 tiqdio_unregister_thinints(void)
3655 {
3656         if (!register_thinint_result)
3657                 s390_unregister_adapter_interrupt(&tiqdio_thinint_handler);
3658 }
3659
3660 static int
3661 qdio_get_qdio_memory(void)
3662 {
3663         int i;
3664         indicator_used[0]=1;
3665
3666         for (i=1;i<INDICATORS_PER_CACHELINE;i++)
3667                 indicator_used[i]=0;
3668         indicators=(__u32*)kmalloc(sizeof(__u32)*(INDICATORS_PER_CACHELINE),
3669                                    GFP_KERNEL);
3670         if (!indicators) return -ENOMEM;
3671         memset(indicators,0,sizeof(__u32)*(INDICATORS_PER_CACHELINE));
3672         return 0;
3673 }
3674
3675 static void
3676 qdio_release_qdio_memory(void)
3677 {
3678         kfree(indicators);
3679 }
3680
3681 static void
3682 qdio_unregister_dbf_views(void)
3683 {
3684         if (qdio_dbf_setup)
3685                 debug_unregister(qdio_dbf_setup);
3686         if (qdio_dbf_sbal)
3687                 debug_unregister(qdio_dbf_sbal);
3688         if (qdio_dbf_sense)
3689                 debug_unregister(qdio_dbf_sense);
3690         if (qdio_dbf_trace)
3691                 debug_unregister(qdio_dbf_trace);
3692 #ifdef CONFIG_QDIO_DEBUG
3693         if (qdio_dbf_slsb_out)
3694                 debug_unregister(qdio_dbf_slsb_out);
3695         if (qdio_dbf_slsb_in)
3696                 debug_unregister(qdio_dbf_slsb_in);
3697 #endif /* CONFIG_QDIO_DEBUG */
3698 }
3699
3700 static int
3701 qdio_register_dbf_views(void)
3702 {
3703         qdio_dbf_setup=debug_register(QDIO_DBF_SETUP_NAME,
3704                                       QDIO_DBF_SETUP_PAGES,
3705                                       QDIO_DBF_SETUP_NR_AREAS,
3706                                       QDIO_DBF_SETUP_LEN);
3707         if (!qdio_dbf_setup)
3708                 goto oom;
3709         debug_register_view(qdio_dbf_setup,&debug_hex_ascii_view);
3710         debug_set_level(qdio_dbf_setup,QDIO_DBF_SETUP_LEVEL);
3711
3712         qdio_dbf_sbal=debug_register(QDIO_DBF_SBAL_NAME,
3713                                      QDIO_DBF_SBAL_PAGES,
3714                                      QDIO_DBF_SBAL_NR_AREAS,
3715                                      QDIO_DBF_SBAL_LEN);
3716         if (!qdio_dbf_sbal)
3717                 goto oom;
3718
3719         debug_register_view(qdio_dbf_sbal,&debug_hex_ascii_view);
3720         debug_set_level(qdio_dbf_sbal,QDIO_DBF_SBAL_LEVEL);
3721
3722         qdio_dbf_sense=debug_register(QDIO_DBF_SENSE_NAME,
3723                                       QDIO_DBF_SENSE_PAGES,
3724                                       QDIO_DBF_SENSE_NR_AREAS,
3725                                       QDIO_DBF_SENSE_LEN);
3726         if (!qdio_dbf_sense)
3727                 goto oom;
3728
3729         debug_register_view(qdio_dbf_sense,&debug_hex_ascii_view);
3730         debug_set_level(qdio_dbf_sense,QDIO_DBF_SENSE_LEVEL);
3731
3732         qdio_dbf_trace=debug_register(QDIO_DBF_TRACE_NAME,
3733                                       QDIO_DBF_TRACE_PAGES,
3734                                       QDIO_DBF_TRACE_NR_AREAS,
3735                                       QDIO_DBF_TRACE_LEN);
3736         if (!qdio_dbf_trace)
3737                 goto oom;
3738
3739         debug_register_view(qdio_dbf_trace,&debug_hex_ascii_view);
3740         debug_set_level(qdio_dbf_trace,QDIO_DBF_TRACE_LEVEL);
3741
3742 #ifdef CONFIG_QDIO_DEBUG
3743         qdio_dbf_slsb_out=debug_register(QDIO_DBF_SLSB_OUT_NAME,
3744                                          QDIO_DBF_SLSB_OUT_PAGES,
3745                                          QDIO_DBF_SLSB_OUT_NR_AREAS,
3746                                          QDIO_DBF_SLSB_OUT_LEN);
3747         if (!qdio_dbf_slsb_out)
3748                 goto oom;
3749         debug_register_view(qdio_dbf_slsb_out,&debug_hex_ascii_view);
3750         debug_set_level(qdio_dbf_slsb_out,QDIO_DBF_SLSB_OUT_LEVEL);
3751
3752         qdio_dbf_slsb_in=debug_register(QDIO_DBF_SLSB_IN_NAME,
3753                                         QDIO_DBF_SLSB_IN_PAGES,
3754                                         QDIO_DBF_SLSB_IN_NR_AREAS,
3755                                         QDIO_DBF_SLSB_IN_LEN);
3756         if (!qdio_dbf_slsb_in)
3757                 goto oom;
3758         debug_register_view(qdio_dbf_slsb_in,&debug_hex_ascii_view);
3759         debug_set_level(qdio_dbf_slsb_in,QDIO_DBF_SLSB_IN_LEVEL);
3760 #endif /* CONFIG_QDIO_DEBUG */
3761         return 0;
3762 oom:
3763         QDIO_PRINT_ERR("not enough memory for dbf.\n");
3764         qdio_unregister_dbf_views();
3765         return -ENOMEM;
3766 }
3767
3768 static int __init
3769 init_QDIO(void)
3770 {
3771         int res;
3772 #ifdef QDIO_PERFORMANCE_STATS
3773         void *ptr;
3774 #endif /* QDIO_PERFORMANCE_STATS */
3775
3776         printk("qdio: loading %s\n",version);
3777
3778         res=qdio_get_qdio_memory();
3779         if (res)
3780                 return res;
3781
3782         res = qdio_register_dbf_views();
3783         if (res)
3784                 return res;
3785
3786         QDIO_DBF_TEXT0(0,setup,"initQDIO");
3787
3788 #ifdef QDIO_PERFORMANCE_STATS
3789         memset((void*)&perf_stats,0,sizeof(perf_stats));
3790         QDIO_DBF_TEXT0(0,setup,"perfstat");
3791         ptr=&perf_stats;
3792         QDIO_DBF_HEX0(0,setup,&ptr,sizeof(void*));
3793 #endif /* QDIO_PERFORMANCE_STATS */
3794
3795         qdio_add_procfs_entry();
3796
3797         if (tiqdio_check_chsc_availability())
3798                 QDIO_PRINT_ERR("Not all CHSCs supported. Continuing.\n");
3799
3800         tiqdio_register_thinints();
3801
3802         return 0;
3803  }
3804
3805 static void __exit
3806 cleanup_QDIO(void)
3807 {
3808         tiqdio_unregister_thinints();
3809         qdio_remove_procfs_entry();
3810         qdio_release_qdio_memory();
3811         qdio_unregister_dbf_views();
3812
3813         printk("qdio: %s: module removed\n",version);
3814 }
3815
3816 module_init(init_QDIO);
3817 module_exit(cleanup_QDIO);
3818
3819 EXPORT_SYMBOL(qdio_allocate);
3820 EXPORT_SYMBOL(qdio_establish);
3821 EXPORT_SYMBOL(qdio_initialize);
3822 EXPORT_SYMBOL(qdio_activate);
3823 EXPORT_SYMBOL(do_QDIO);
3824 EXPORT_SYMBOL(qdio_shutdown);
3825 EXPORT_SYMBOL(qdio_free);
3826 EXPORT_SYMBOL(qdio_cleanup);
3827 EXPORT_SYMBOL(qdio_synchronize);