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qdio.c

/*
 *
 * linux/drivers/s390/cio/qdio.c
 *
 * Linux for S/390 QDIO base support, Hipersocket base support
 * version 2
 *
 * Copyright 2000,2002 IBM Corporation
 * Author(s):             Utz Bacher <utz.bacher@de.ibm.com>
 * 2.6 cio integration by Cornelia Huck <cornelia.huck@de.ibm.com>
 *
 * Restriction: only 63 iqdio subchannels would have its own indicator,
 * after that, subsequent subchannels share one indicator
 *
 *
 *
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2, or (at your option)
 * any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

#include <linux/module.h>
#include <linux/init.h>

#include <linux/slab.h>
#include <linux/kernel.h>
#include <linux/proc_fs.h>
#include <linux/timer.h>
#include <linux/mempool.h>

#include <asm/ccwdev.h>
#include <asm/io.h>
#include <asm/atomic.h>
#include <asm/semaphore.h>
#include <asm/timex.h>

#include <asm/debug.h>
#include <asm/s390_rdev.h>
#include <asm/qdio.h>

#include "cio.h"
#include "css.h"
#include "device.h"
#include "airq.h"
#include "qdio.h"
#include "ioasm.h"
#include "chsc.h"

/****************** MODULE PARAMETER VARIABLES ********************/
MODULE_AUTHOR("Utz Bacher <utz.bacher@de.ibm.com>");
MODULE_DESCRIPTION("QDIO base support version 2, " \
               "Copyright 2000 IBM Corporation");
MODULE_LICENSE("GPL");

/******************** HERE WE GO ***********************************/

static const char version[] = "QDIO base support version 2";

static int qdio_performance_stats = 0;
static int proc_perf_file_registration;
static struct qdio_perf_stats perf_stats;

static int hydra_thinints;
static int is_passthrough = 0;
static int omit_svs;

static int indicator_used[INDICATORS_PER_CACHELINE];
static __u32 * volatile indicators;
static __u32 volatile spare_indicator;
static atomic_t spare_indicator_usecount;
#define QDIO_MEMPOOL_SCSSC_ELEMENTS 2
static mempool_t *qdio_mempool_scssc;
static struct kmem_cache *qdio_q_cache;

static debug_info_t *qdio_dbf_setup;
static debug_info_t *qdio_dbf_sbal;
static debug_info_t *qdio_dbf_trace;
static debug_info_t *qdio_dbf_sense;
#ifdef CONFIG_QDIO_DEBUG
static debug_info_t *qdio_dbf_slsb_out;
static debug_info_t *qdio_dbf_slsb_in;
#endif /* CONFIG_QDIO_DEBUG */

/* iQDIO stuff: */
static volatile struct qdio_q *tiq_list=NULL; /* volatile as it could change
                                     during a while loop */
static DEFINE_SPINLOCK(ttiq_list_lock);
static int register_thinint_result;
static void tiqdio_tl(unsigned long);
static DECLARE_TASKLET(tiqdio_tasklet,tiqdio_tl,0);

/* not a macro, as one of the arguments is atomic_read */
static inline int 
qdio_min(int a,int b)
{
      if (a<b)
            return a;
      else
            return b;
}

/***************** SCRUBBER HELPER ROUTINES **********************/
#ifdef CONFIG_64BIT
static inline void qdio_perf_stat_inc(atomic64_t *count)
{
      if (qdio_performance_stats)
            atomic64_inc(count);
}

static inline void qdio_perf_stat_dec(atomic64_t *count)
{
      if (qdio_performance_stats)
            atomic64_dec(count);
}
#else /* CONFIG_64BIT */
static inline void qdio_perf_stat_inc(atomic_t *count)
{
      if (qdio_performance_stats)
            atomic_inc(count);
}

static inline void qdio_perf_stat_dec(atomic_t *count)
{
      if (qdio_performance_stats)
            atomic_dec(count);
}
#endif /* CONFIG_64BIT */

static inline __u64 
qdio_get_micros(void)
{
      return (get_clock() >> 12); /* time>>12 is microseconds */
}

/* 
 * unfortunately, we can't just xchg the values; in do_QDIO we want to reserve
 * the q in any case, so that we'll not be interrupted when we are in
 * qdio_mark_tiq... shouldn't have a really bad impact, as reserving almost
 * ever works (last famous words) 
 */
static inline int 
qdio_reserve_q(struct qdio_q *q)
{
      return atomic_add_return(1,&q->use_count) - 1;
}

static inline void 
qdio_release_q(struct qdio_q *q)
{
      atomic_dec(&q->use_count);
}

/*check ccq  */
static int
qdio_check_ccq(struct qdio_q *q, unsigned int ccq)
{
      char dbf_text[15];

      if (ccq == 0 || ccq == 32)
            return 0;
      if (ccq == 96 || ccq == 97)
            return 1;
      /*notify devices immediately*/
      sprintf(dbf_text,"%d", ccq);
      QDIO_DBF_TEXT2(1,trace,dbf_text);
      return -EIO;
}
/* EQBS: extract buffer states */
static int
qdio_do_eqbs(struct qdio_q *q, unsigned char *state,
           unsigned int *start, unsigned int *cnt)
{
      struct qdio_irq *irq;
      unsigned int tmp_cnt, q_no, ccq;
      int rc ;
      char dbf_text[15];

      ccq = 0;
      tmp_cnt = *cnt;
      irq = (struct qdio_irq*)q->irq_ptr;
      q_no = q->q_no;
      if(!q->is_input_q)
            q_no += irq->no_input_qs;
again:
      ccq = do_eqbs(irq->sch_token, state, q_no, start, cnt);
      rc = qdio_check_ccq(q, ccq);
      if ((ccq == 96) && (tmp_cnt != *cnt))
            rc = 0;
      if (rc == 1) {
            QDIO_DBF_TEXT5(1,trace,"eqAGAIN");
            goto again;
      }
      if (rc < 0) {
                QDIO_DBF_TEXT2(1,trace,"eqberr");
                sprintf(dbf_text,"%2x,%2x,%d,%d",tmp_cnt, *cnt, ccq, q_no);
                QDIO_DBF_TEXT2(1,trace,dbf_text);
            q->handler(q->cdev,QDIO_STATUS_ACTIVATE_CHECK_CONDITION|
                        QDIO_STATUS_LOOK_FOR_ERROR,
                        0, 0, 0, -1, -1, q->int_parm);
            return 0;
      }
      return (tmp_cnt - *cnt);
}

/* SQBS: set buffer states */
static int
qdio_do_sqbs(struct qdio_q *q, unsigned char state,
           unsigned int *start, unsigned int *cnt)
{
      struct qdio_irq *irq;
      unsigned int tmp_cnt, q_no, ccq;
      int rc;
      char dbf_text[15];

      ccq = 0;
      tmp_cnt = *cnt;
      irq = (struct qdio_irq*)q->irq_ptr;
      q_no = q->q_no;
      if(!q->is_input_q)
            q_no += irq->no_input_qs;
again:
      ccq = do_sqbs(irq->sch_token, state, q_no, start, cnt);
      rc = qdio_check_ccq(q, ccq);
      if (rc == 1) {
            QDIO_DBF_TEXT5(1,trace,"sqAGAIN");
            goto again;
      }
      if (rc < 0) {
            QDIO_DBF_TEXT3(1,trace,"sqberr");
            sprintf(dbf_text,"%2x,%2x",tmp_cnt,*cnt);
            QDIO_DBF_TEXT3(1,trace,dbf_text);
            sprintf(dbf_text,"%d,%d",ccq,q_no);
            QDIO_DBF_TEXT3(1,trace,dbf_text);
            q->handler(q->cdev,QDIO_STATUS_ACTIVATE_CHECK_CONDITION|
                        QDIO_STATUS_LOOK_FOR_ERROR,
                        0, 0, 0, -1, -1, q->int_parm);
            return 0;
      }
      return (tmp_cnt - *cnt);
}

static inline int
qdio_set_slsb(struct qdio_q *q, unsigned int *bufno,
            unsigned char state, unsigned int *count)
{
      volatile char *slsb;
      struct qdio_irq *irq;

      irq = (struct qdio_irq*)q->irq_ptr;
      if (!irq->is_qebsm) {
            slsb = (char *)&q->slsb.acc.val[(*bufno)];
            xchg(slsb, state);
            return 1;
      }
      return qdio_do_sqbs(q, state, bufno, count);
}

#ifdef CONFIG_QDIO_DEBUG
static inline void
qdio_trace_slsb(struct qdio_q *q)
{
      if (q->queue_type==QDIO_TRACE_QTYPE) {
            if (q->is_input_q)
                  QDIO_DBF_HEX2(0,slsb_in,&q->slsb,
                              QDIO_MAX_BUFFERS_PER_Q);
            else
                  QDIO_DBF_HEX2(0,slsb_out,&q->slsb,
                              QDIO_MAX_BUFFERS_PER_Q);
      }
}
#endif

static inline int
set_slsb(struct qdio_q *q, unsigned int *bufno,
       unsigned char state, unsigned int *count)
{
      int rc;
#ifdef CONFIG_QDIO_DEBUG
      qdio_trace_slsb(q);
#endif
      rc = qdio_set_slsb(q, bufno, state, count);
#ifdef CONFIG_QDIO_DEBUG
      qdio_trace_slsb(q);
#endif
      return rc;
}
static inline int 
qdio_siga_sync(struct qdio_q *q, unsigned int gpr2,
             unsigned int gpr3)
{
      int cc;

      QDIO_DBF_TEXT4(0,trace,"sigasync");
      QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));

      qdio_perf_stat_inc(&perf_stats.siga_syncs);

      cc = do_siga_sync(q->schid, gpr2, gpr3);
      if (cc)
            QDIO_DBF_HEX3(0,trace,&cc,sizeof(int*));

      return cc;
}

static inline int
qdio_siga_sync_q(struct qdio_q *q)
{
      if (q->is_input_q)
            return qdio_siga_sync(q, 0, q->mask);
      return qdio_siga_sync(q, q->mask, 0);
}

static int
__do_siga_output(struct qdio_q *q, unsigned int *busy_bit)
{
       struct qdio_irq *irq;
       unsigned int fc = 0;
       unsigned long schid;

       irq = (struct qdio_irq *) q->irq_ptr;
       if (!irq->is_qebsm)
             schid = *((u32 *)&q->schid);
       else {
             schid = irq->sch_token;
             fc |= 0x80;
       }
       return do_siga_output(schid, q->mask, busy_bit, fc);
}

/* 
 * returns QDIO_SIGA_ERROR_ACCESS_EXCEPTION as cc, when SIGA returns
 * an access exception 
 */
static int
qdio_siga_output(struct qdio_q *q)
{
      int cc;
      __u32 busy_bit;
      __u64 start_time=0;

      qdio_perf_stat_inc(&perf_stats.siga_outs);

      QDIO_DBF_TEXT4(0,trace,"sigaout");
      QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));

      for (;;) {
            cc = __do_siga_output(q, &busy_bit);
//QDIO_PRINT_ERR("cc=%x, busy=%x\n",cc,busy_bit);
            if ((cc==2) && (busy_bit) && (q->is_iqdio_q)) {
                  if (!start_time) 
                        start_time=NOW;
                  if ((NOW-start_time)>QDIO_BUSY_BIT_PATIENCE)
                        break;
            } else
                  break;
      }
      
      if ((cc==2) && (busy_bit)) 
            cc |= QDIO_SIGA_ERROR_B_BIT_SET;

      if (cc)
            QDIO_DBF_HEX3(0,trace,&cc,sizeof(int*));

      return cc;
}

static int
qdio_siga_input(struct qdio_q *q)
{
      int cc;

      QDIO_DBF_TEXT4(0,trace,"sigain");
      QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));

      qdio_perf_stat_inc(&perf_stats.siga_ins);

      cc = do_siga_input(q->schid, q->mask);
      
      if (cc)
            QDIO_DBF_HEX3(0,trace,&cc,sizeof(int*));

      return cc;
}

/* locked by the locks in qdio_activate and qdio_cleanup */
static __u32 *
qdio_get_indicator(void)
{
      int i;

      for (i=1;i<INDICATORS_PER_CACHELINE;i++)
            if (!indicator_used[i]) {
                  indicator_used[i]=1;
                  return indicators+i;
            }
      atomic_inc(&spare_indicator_usecount);
      return (__u32 * volatile) &spare_indicator;
}

/* locked by the locks in qdio_activate and qdio_cleanup */
static void 
qdio_put_indicator(__u32 *addr)
{
      int i;

      if ( (addr) && (addr!=&spare_indicator) ) {
            i=addr-indicators;
            indicator_used[i]=0;
      }
      if (addr == &spare_indicator)
            atomic_dec(&spare_indicator_usecount);
}

static inline void
tiqdio_clear_summary_bit(__u32 *location)
{
      QDIO_DBF_TEXT5(0,trace,"clrsummb");
      QDIO_DBF_HEX5(0,trace,&location,sizeof(void*));

      xchg(location,0);
}

static inline  void
tiqdio_set_summary_bit(__u32 *location)
{
      QDIO_DBF_TEXT5(0,trace,"setsummb");
      QDIO_DBF_HEX5(0,trace,&location,sizeof(void*));

      xchg(location,-1);
}

static inline void 
tiqdio_sched_tl(void)
{
      tasklet_hi_schedule(&tiqdio_tasklet);
}

static void
qdio_mark_tiq(struct qdio_q *q)
{
      unsigned long flags;

      QDIO_DBF_TEXT4(0,trace,"mark iq");
      QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));

      spin_lock_irqsave(&ttiq_list_lock,flags);
      if (unlikely(atomic_read(&q->is_in_shutdown)))
            goto out_unlock;

      if (!q->is_input_q)
            goto out_unlock;

      if ((q->list_prev) || (q->list_next)) 
            goto out_unlock;

      if (!tiq_list) {
            tiq_list=q;
            q->list_prev=q;
            q->list_next=q;
      } else {
            q->list_next=tiq_list;
            q->list_prev=tiq_list->list_prev;
            tiq_list->list_prev->list_next=q;
            tiq_list->list_prev=q;
      }
      spin_unlock_irqrestore(&ttiq_list_lock,flags);

      tiqdio_set_summary_bit((__u32*)q->dev_st_chg_ind);
      tiqdio_sched_tl();
      return;
out_unlock:
      spin_unlock_irqrestore(&ttiq_list_lock,flags);
      return;
}

static inline void
qdio_mark_q(struct qdio_q *q)
{
      QDIO_DBF_TEXT4(0,trace,"mark q");
      QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));

      if (unlikely(atomic_read(&q->is_in_shutdown)))
            return;

      tasklet_schedule(&q->tasklet);
}

static int
qdio_stop_polling(struct qdio_q *q)
{
#ifdef QDIO_USE_PROCESSING_STATE
       unsigned int tmp, gsf, count = 1;
       unsigned char state = 0;
       struct qdio_irq *irq = (struct qdio_irq *) q->irq_ptr;

      if (!atomic_xchg(&q->polling,0))
            return 1;

      QDIO_DBF_TEXT4(0,trace,"stoppoll");
      QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));

      /* show the card that we are not polling anymore */
      if (!q->is_input_q)
            return 1;

       tmp = gsf = GET_SAVED_FRONTIER(q);
       tmp = ((tmp + QDIO_MAX_BUFFERS_PER_Q-1) & (QDIO_MAX_BUFFERS_PER_Q-1) );
       set_slsb(q, &tmp, SLSB_P_INPUT_NOT_INIT, &count);

      /* 
       * we don't issue this SYNC_MEMORY, as we trust Rick T and
       * moreover will not use the PROCESSING state under VM, so
       * q->polling was 0 anyway
       */
      /*SYNC_MEMORY;*/
       if (irq->is_qebsm) {
               count = 1;
               qdio_do_eqbs(q, &state, &gsf, &count);
       } else
               state = q->slsb.acc.val[gsf];
       if (state != SLSB_P_INPUT_PRIMED)
            return 1;
      /* 
       * set our summary bit again, as otherwise there is a
       * small window we can miss between resetting it and
       * checking for PRIMED state 
       */
      if (q->is_thinint_q)
            tiqdio_set_summary_bit((__u32*)q->dev_st_chg_ind);
      return 0;

#else /* QDIO_USE_PROCESSING_STATE */
      return 1;
#endif /* QDIO_USE_PROCESSING_STATE */
}

/* 
 * see the comment in do_QDIO and before qdio_reserve_q about the
 * sophisticated locking outside of unmark_q, so that we don't need to
 * disable the interrupts :-) 
*/
static void
qdio_unmark_q(struct qdio_q *q)
{
      unsigned long flags;

      QDIO_DBF_TEXT4(0,trace,"unmark q");
      QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));

      if ((!q->list_prev)||(!q->list_next))
            return;

      if ((q->is_thinint_q)&&(q->is_input_q)) {
            /* iQDIO */
            spin_lock_irqsave(&ttiq_list_lock,flags);
            /* in case cleanup has done this already and simultanously
             * qdio_unmark_q is called from the interrupt handler, we've
             * got to check this in this specific case again */
            if ((!q->list_prev)||(!q->list_next))
                  goto out;
            if (q->list_next==q) {
                  /* q was the only interesting q */
                  tiq_list=NULL;
                  q->list_next=NULL;
                  q->list_prev=NULL;
            } else {
                  q->list_next->list_prev=q->list_prev;
                  q->list_prev->list_next=q->list_next;
                  tiq_list=q->list_next;
                  q->list_next=NULL;
                  q->list_prev=NULL;
            }
out:
            spin_unlock_irqrestore(&ttiq_list_lock,flags);
      }
}

static inline unsigned long 
tiqdio_clear_global_summary(void)
{
      unsigned long time;

      QDIO_DBF_TEXT5(0,trace,"clrglobl");
      
      time = do_clear_global_summary();

      QDIO_DBF_HEX5(0,trace,&time,sizeof(unsigned long));

      return time;
}


/************************* OUTBOUND ROUTINES *******************************/
static int
qdio_qebsm_get_outbound_buffer_frontier(struct qdio_q *q)
{
        struct qdio_irq *irq;
        unsigned char state;
        unsigned int cnt, count, ftc;

        irq = (struct qdio_irq *) q->irq_ptr;
        if ((!q->is_iqdio_q) && (!q->hydra_gives_outbound_pcis))
                SYNC_MEMORY;

        ftc = q->first_to_check;
        count = qdio_min(atomic_read(&q->number_of_buffers_used),
                        (QDIO_MAX_BUFFERS_PER_Q-1));
        if (count == 0)
                return q->first_to_check;
        cnt = qdio_do_eqbs(q, &state, &ftc, &count);
        if (cnt == 0)
                return q->first_to_check;
        switch (state) {
        case SLSB_P_OUTPUT_ERROR:
                QDIO_DBF_TEXT3(0,trace,"outperr");
                atomic_sub(cnt , &q->number_of_buffers_used);
                if (q->qdio_error)
                        q->error_status_flags |=
                                QDIO_STATUS_MORE_THAN_ONE_QDIO_ERROR;
                q->qdio_error = SLSB_P_OUTPUT_ERROR;
                q->error_status_flags |= QDIO_STATUS_LOOK_FOR_ERROR;
                q->first_to_check = ftc;
                break;
        case SLSB_P_OUTPUT_EMPTY:
                QDIO_DBF_TEXT5(0,trace,"outpempt");
                atomic_sub(cnt, &q->number_of_buffers_used);
                q->first_to_check = ftc;
                break;
        case SLSB_CU_OUTPUT_PRIMED:
                /* all buffers primed */
                QDIO_DBF_TEXT5(0,trace,"outpprim");
                break;
        default:
                break;
        }
        QDIO_DBF_HEX4(0,trace,&q->first_to_check,sizeof(int));
        return q->first_to_check;
}

static int
qdio_qebsm_get_inbound_buffer_frontier(struct qdio_q *q)
{
        struct qdio_irq *irq;
        unsigned char state;
        int tmp, ftc, count, cnt;
        char dbf_text[15];


        irq = (struct qdio_irq *) q->irq_ptr;
        ftc = q->first_to_check;
        count = qdio_min(atomic_read(&q->number_of_buffers_used),
                        (QDIO_MAX_BUFFERS_PER_Q-1));
        if (count == 0)
                 return q->first_to_check;
        cnt = qdio_do_eqbs(q, &state, &ftc, &count);
        if (cnt == 0)
                 return q->first_to_check;
        switch (state) {
        case SLSB_P_INPUT_ERROR :
#ifdef CONFIG_QDIO_DEBUG
                QDIO_DBF_TEXT3(1,trace,"inperr");
                sprintf(dbf_text,"%2x,%2x",ftc,count);
                QDIO_DBF_TEXT3(1,trace,dbf_text);
#endif /* CONFIG_QDIO_DEBUG */
                if (q->qdio_error)
                        q->error_status_flags |=
                                QDIO_STATUS_MORE_THAN_ONE_QDIO_ERROR;
                q->qdio_error = SLSB_P_INPUT_ERROR;
                q->error_status_flags |= QDIO_STATUS_LOOK_FOR_ERROR;
                atomic_sub(cnt, &q->number_of_buffers_used);
                q->first_to_check = ftc;
                break;
        case SLSB_P_INPUT_PRIMED :
                QDIO_DBF_TEXT3(0,trace,"inptprim");
                sprintf(dbf_text,"%2x,%2x",ftc,count);
                QDIO_DBF_TEXT3(1,trace,dbf_text);
                tmp = 0;
                ftc = q->first_to_check;
#ifdef QDIO_USE_PROCESSING_STATE
            if (cnt > 1) {
                  cnt -= 1;
                  tmp = set_slsb(q, &ftc, SLSB_P_INPUT_NOT_INIT, &cnt);
                  if (!tmp)
                        break;
            }
            cnt = 1;
            tmp += set_slsb(q, &ftc,
                         SLSB_P_INPUT_PROCESSING, &cnt);
            atomic_set(&q->polling, 1);
#else
                tmp = set_slsb(q, &ftc, SLSB_P_INPUT_NOT_INIT, &cnt);
#endif
                atomic_sub(tmp, &q->number_of_buffers_used);
                q->first_to_check = ftc;
                break;
        case SLSB_CU_INPUT_EMPTY:
        case SLSB_P_INPUT_NOT_INIT:
        case SLSB_P_INPUT_PROCESSING:
                QDIO_DBF_TEXT5(0,trace,"inpnipro");
                break;
        default:
                break;
        }
        QDIO_DBF_HEX4(0,trace,&q->first_to_check,sizeof(int));
        return q->first_to_check;
}

static int
qdio_get_outbound_buffer_frontier(struct qdio_q *q)
{
      struct qdio_irq *irq;
        volatile char *slsb;
        unsigned int count = 1;
        int first_not_to_check, f, f_mod_no;
      char dbf_text[15];

      QDIO_DBF_TEXT4(0,trace,"getobfro");
      QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));

      irq = (struct qdio_irq *) q->irq_ptr;
      if (irq->is_qebsm)
            return qdio_qebsm_get_outbound_buffer_frontier(q);

      slsb=&q->slsb.acc.val[0];
      f_mod_no=f=q->first_to_check;
      /* 
       * f points to already processed elements, so f+no_used is correct...
       * ... but: we don't check 128 buffers, as otherwise
       * qdio_has_outbound_q_moved would return 0 
       */
      first_not_to_check=f+qdio_min(atomic_read(&q->number_of_buffers_used),
                              (QDIO_MAX_BUFFERS_PER_Q-1));

      if (((!q->is_iqdio_q) && (!q->hydra_gives_outbound_pcis)) ||
             (q->queue_type == QDIO_IQDIO_QFMT_ASYNCH))
            SYNC_MEMORY;

check_next:
      if (f==first_not_to_check) 
            goto out;

      switch(slsb[f_mod_no]) {

        /* the adapter has not fetched the output yet */
      case SLSB_CU_OUTPUT_PRIMED:
            QDIO_DBF_TEXT5(0,trace,"outpprim");
            break;

      /* the adapter got it */
      case SLSB_P_OUTPUT_EMPTY:
            atomic_dec(&q->number_of_buffers_used);
            f++;
            f_mod_no=f&(QDIO_MAX_BUFFERS_PER_Q-1);
            QDIO_DBF_TEXT5(0,trace,"outpempt");
            goto check_next;

      case SLSB_P_OUTPUT_ERROR:
            QDIO_DBF_TEXT3(0,trace,"outperr");
            sprintf(dbf_text,"%x-%x-%x",f_mod_no,
                  q->sbal[f_mod_no]->element[14].sbalf.value,
                  q->sbal[f_mod_no]->element[15].sbalf.value);
            QDIO_DBF_TEXT3(1,trace,dbf_text);
            QDIO_DBF_HEX2(1,sbal,q->sbal[f_mod_no],256);

            /* kind of process the buffer */
            set_slsb(q, &f_mod_no, SLSB_P_OUTPUT_NOT_INIT, &count);

            /* 
             * we increment the frontier, as this buffer
             * was processed obviously 
             */
            atomic_dec(&q->number_of_buffers_used);
            f_mod_no=(f_mod_no+1)&(QDIO_MAX_BUFFERS_PER_Q-1);

            if (q->qdio_error)
                  q->error_status_flags|=
                        QDIO_STATUS_MORE_THAN_ONE_QDIO_ERROR;
            q->qdio_error=SLSB_P_OUTPUT_ERROR;
            q->error_status_flags|=QDIO_STATUS_LOOK_FOR_ERROR;

            break;

      /* no new buffers */
      default:
            QDIO_DBF_TEXT5(0,trace,"outpni");
      }
out:
      return (q->first_to_check=f_mod_no);
}

/* all buffers are processed */
static int
qdio_is_outbound_q_done(struct qdio_q *q)
{
      int no_used;
#ifdef CONFIG_QDIO_DEBUG
      char dbf_text[15];
#endif

      no_used=atomic_read(&q->number_of_buffers_used);

#ifdef CONFIG_QDIO_DEBUG
      if (no_used) {
            sprintf(dbf_text,"oqisnt%02x",no_used);
            QDIO_DBF_TEXT4(0,trace,dbf_text);
      } else {
            QDIO_DBF_TEXT4(0,trace,"oqisdone");
      }
      QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
#endif /* CONFIG_QDIO_DEBUG */
      return (no_used==0);
}

static int
qdio_has_outbound_q_moved(struct qdio_q *q)
{
      int i;

      i=qdio_get_outbound_buffer_frontier(q);

      if ( (i!=GET_SAVED_FRONTIER(q)) ||
           (q->error_status_flags&QDIO_STATUS_LOOK_FOR_ERROR) ) {
            SAVE_FRONTIER(q,i);
            QDIO_DBF_TEXT4(0,trace,"oqhasmvd");
            QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
            return 1;
      } else {
            QDIO_DBF_TEXT4(0,trace,"oqhsntmv");
            QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
            return 0;
      }
}

static void
qdio_kick_outbound_q(struct qdio_q *q)
{
      int result;
#ifdef CONFIG_QDIO_DEBUG
      char dbf_text[15];

      QDIO_DBF_TEXT4(0,trace,"kickoutq");
      QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
#endif /* CONFIG_QDIO_DEBUG */

      if (!q->siga_out)
            return;

      /* here's the story with cc=2 and busy bit set (thanks, Rick):
       * VM's CP could present us cc=2 and busy bit set on SIGA-write
       * during reconfiguration of their Guest LAN (only in HIPERS mode,
       * QDIO mode is asynchronous -- cc=2 and busy bit there will take
       * the queues down immediately; and not being under VM we have a
       * problem on cc=2 and busy bit set right away).
       *
       * Therefore qdio_siga_output will try for a short time constantly,
       * if such a condition occurs. If it doesn't change, it will
       * increase the busy_siga_counter and save the timestamp, and
       * schedule the queue for later processing (via mark_q, using the
       * queue tasklet). __qdio_outbound_processing will check out the
       * counter. If non-zero, it will call qdio_kick_outbound_q as often
       * as the value of the counter. This will attempt further SIGA
       * instructions. For each successful SIGA, the counter is
       * decreased, for failing SIGAs the counter remains the same, after
       * all.
       * After some time of no movement, qdio_kick_outbound_q will
       * finally fail and reflect corresponding error codes to call
       * the upper layer module and have it take the queues down.
       *
       * Note that this is a change from the original HiperSockets design
       * (saying cc=2 and busy bit means take the queues down), but in
       * these days Guest LAN didn't exist... excessive cc=2 with busy bit
       * conditions will still take the queues down, but the threshold is
       * higher due to the Guest LAN environment.
       */


      result=qdio_siga_output(q);

      switch (result) {
      case 0:
            /* went smooth this time, reset timestamp */
#ifdef CONFIG_QDIO_DEBUG
            QDIO_DBF_TEXT3(0,trace,"cc2reslv");
            sprintf(dbf_text,"%4x%2x%2x",q->schid.sch_no,q->q_no,
                  atomic_read(&q->busy_siga_counter));
            QDIO_DBF_TEXT3(0,trace,dbf_text);
#endif /* CONFIG_QDIO_DEBUG */
            q->timing.busy_start=0;
            break;
      case (2|QDIO_SIGA_ERROR_B_BIT_SET):
            /* cc=2 and busy bit: */
            atomic_inc(&q->busy_siga_counter);

            /* if the last siga was successful, save
             * timestamp here */
            if (!q->timing.busy_start)
                  q->timing.busy_start=NOW;

            /* if we're in time, don't touch error_status_flags
             * and siga_error */
            if (NOW-q->timing.busy_start<QDIO_BUSY_BIT_GIVE_UP) {
                  qdio_mark_q(q);
                  break;
            }
            QDIO_DBF_TEXT2(0,trace,"cc2REPRT");
#ifdef CONFIG_QDIO_DEBUG
            sprintf(dbf_text,"%4x%2x%2x",q->schid.sch_no,q->q_no,
                  atomic_read(&q->busy_siga_counter));
            QDIO_DBF_TEXT3(0,trace,dbf_text);
#endif /* CONFIG_QDIO_DEBUG */
            /* else fallthrough and report error */
      default:
            /* for plain cc=1, 2 or 3: */
            if (q->siga_error)
                  q->error_status_flags|=
                        QDIO_STATUS_MORE_THAN_ONE_SIGA_ERROR;
            q->error_status_flags|=
                  QDIO_STATUS_LOOK_FOR_ERROR;
            q->siga_error=result;
      }
}

static void
qdio_kick_outbound_handler(struct qdio_q *q)
{
      int start, end, real_end, count;
#ifdef CONFIG_QDIO_DEBUG
      char dbf_text[15];
#endif

      start = q->first_element_to_kick;
      /* last_move_ftc was just updated */
      real_end = GET_SAVED_FRONTIER(q);
      end = (real_end+QDIO_MAX_BUFFERS_PER_Q-1)&
            (QDIO_MAX_BUFFERS_PER_Q-1);
      count = (end+QDIO_MAX_BUFFERS_PER_Q+1-start)&
            (QDIO_MAX_BUFFERS_PER_Q-1);

#ifdef CONFIG_QDIO_DEBUG
      QDIO_DBF_TEXT4(0,trace,"kickouth");
      QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));

      sprintf(dbf_text,"s=%2xc=%2x",start,count);
      QDIO_DBF_TEXT4(0,trace,dbf_text);
#endif /* CONFIG_QDIO_DEBUG */

      if (q->state==QDIO_IRQ_STATE_ACTIVE)
            q->handler(q->cdev,QDIO_STATUS_OUTBOUND_INT|
                     q->error_status_flags,
                     q->qdio_error,q->siga_error,q->q_no,start,count,
                     q->int_parm);

      /* for the next time: */
      q->first_element_to_kick=real_end;
      q->qdio_error=0;
      q->siga_error=0;
      q->error_status_flags=0;
}

static void
__qdio_outbound_processing(struct qdio_q *q)
{
      int siga_attempts;

      QDIO_DBF_TEXT4(0,trace,"qoutproc");
      QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));

      if (unlikely(qdio_reserve_q(q))) {
            qdio_release_q(q);
            qdio_perf_stat_inc(&perf_stats.outbound_tl_runs_resched);
            /* as we're sissies, we'll check next time */
            if (likely(!atomic_read(&q->is_in_shutdown))) {
                  qdio_mark_q(q);
                  QDIO_DBF_TEXT4(0,trace,"busy,agn");
            }
            return;
      }
      qdio_perf_stat_inc(&perf_stats.outbound_tl_runs);
      qdio_perf_stat_inc(&perf_stats.tl_runs);

      /* see comment in qdio_kick_outbound_q */
      siga_attempts=atomic_read(&q->busy_siga_counter);
      while (siga_attempts) {
            atomic_dec(&q->busy_siga_counter);
            qdio_kick_outbound_q(q);
            siga_attempts--;
      }

      if (qdio_has_outbound_q_moved(q))
            qdio_kick_outbound_handler(q);

      if (q->queue_type == QDIO_ZFCP_QFMT) {
            if ((!q->hydra_gives_outbound_pcis) &&
                (!qdio_is_outbound_q_done(q)))
                  qdio_mark_q(q);
      }
      else if (((!q->is_iqdio_q) && (!q->is_pci_out)) ||
             (q->queue_type == QDIO_IQDIO_QFMT_ASYNCH)) {
            /* 
             * make sure buffer switch from PRIMED to EMPTY is noticed
             * and outbound_handler is called
             */
            if (qdio_is_outbound_q_done(q)) {
                  del_timer(&q->timer);
            } else {
                  if (!timer_pending(&q->timer))
                        mod_timer(&q->timer, jiffies +
                                QDIO_FORCE_CHECK_TIMEOUT);
            }
      }

      qdio_release_q(q);
}

static void
qdio_outbound_processing(unsigned long q)
{
      __qdio_outbound_processing((struct qdio_q *) q);
}

/************************* INBOUND ROUTINES *******************************/


static int
qdio_get_inbound_buffer_frontier(struct qdio_q *q)
{
      struct qdio_irq *irq;
      int f,f_mod_no;
      volatile char *slsb;
      unsigned int count = 1;
      int first_not_to_check;
#ifdef CONFIG_QDIO_DEBUG
      char dbf_text[15];
#endif /* CONFIG_QDIO_DEBUG */
#ifdef QDIO_USE_PROCESSING_STATE
      int last_position=-1;
#endif /* QDIO_USE_PROCESSING_STATE */

      QDIO_DBF_TEXT4(0,trace,"getibfro");
      QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));

      irq = (struct qdio_irq *) q->irq_ptr;
      if (irq->is_qebsm)
            return qdio_qebsm_get_inbound_buffer_frontier(q);

      slsb=&q->slsb.acc.val[0];
      f_mod_no=f=q->first_to_check;
      /* 
       * we don't check 128 buffers, as otherwise qdio_has_inbound_q_moved
       * would return 0 
       */
      first_not_to_check=f+qdio_min(atomic_read(&q->number_of_buffers_used),
                              (QDIO_MAX_BUFFERS_PER_Q-1));

      /* 
       * we don't use this one, as a PCI or we after a thin interrupt
       * will sync the queues
       */
      /* SYNC_MEMORY;*/

check_next:
      f_mod_no=f&(QDIO_MAX_BUFFERS_PER_Q-1);
      if (f==first_not_to_check) 
            goto out;
      switch (slsb[f_mod_no]) {

      /* CU_EMPTY means frontier is reached */
      case SLSB_CU_INPUT_EMPTY:
            QDIO_DBF_TEXT5(0,trace,"inptempt");
            break;

      /* P_PRIMED means set slsb to P_PROCESSING and move on */
      case SLSB_P_INPUT_PRIMED:
            QDIO_DBF_TEXT5(0,trace,"inptprim");

#ifdef QDIO_USE_PROCESSING_STATE
            /* 
             * as soon as running under VM, polling the input queues will
             * kill VM in terms of CP overhead 
             */
            if (q->siga_sync) {
                  set_slsb(q, &f_mod_no, SLSB_P_INPUT_NOT_INIT, &count);
            } else {
                  /* set the previous buffer to NOT_INIT. The current
                   * buffer will be set to PROCESSING at the end of
                   * this function to avoid further interrupts. */
                  if (last_position>=0)
                        set_slsb(q, &last_position,
                               SLSB_P_INPUT_NOT_INIT, &count);
                  atomic_set(&q->polling,1);
                  last_position=f_mod_no;
            }
#else /* QDIO_USE_PROCESSING_STATE */
            set_slsb(q, &f_mod_no, SLSB_P_INPUT_NOT_INIT, &count);
#endif /* QDIO_USE_PROCESSING_STATE */
            /* 
             * not needed, as the inbound queue will be synced on the next
             * siga-r, resp. tiqdio_is_inbound_q_done will do the siga-s
             */
            /*SYNC_MEMORY;*/
            f++;
            atomic_dec(&q->number_of_buffers_used);
            goto check_next;

      case SLSB_P_INPUT_NOT_INIT:
      case SLSB_P_INPUT_PROCESSING:
            QDIO_DBF_TEXT5(0,trace,"inpnipro");
            break;

      /* P_ERROR means frontier is reached, break and report error */
      case SLSB_P_INPUT_ERROR:
#ifdef CONFIG_QDIO_DEBUG
            sprintf(dbf_text,"inperr%2x",f_mod_no);
            QDIO_DBF_TEXT3(1,trace,dbf_text);
#endif /* CONFIG_QDIO_DEBUG */
            QDIO_DBF_HEX2(1,sbal,q->sbal[f_mod_no],256);

            /* kind of process the buffer */
            set_slsb(q, &f_mod_no, SLSB_P_INPUT_NOT_INIT, &count);

            if (q->qdio_error)
                  q->error_status_flags|=
                        QDIO_STATUS_MORE_THAN_ONE_QDIO_ERROR;
            q->qdio_error=SLSB_P_INPUT_ERROR;
            q->error_status_flags|=QDIO_STATUS_LOOK_FOR_ERROR;

            /* we increment the frontier, as this buffer
             * was processed obviously */
            f_mod_no=(f_mod_no+1)&(QDIO_MAX_BUFFERS_PER_Q-1);
            atomic_dec(&q->number_of_buffers_used);

#ifdef QDIO_USE_PROCESSING_STATE
            last_position=-1;
#endif /* QDIO_USE_PROCESSING_STATE */

            break;

      /* everything else means frontier not changed (HALTED or so) */
      default: 
            break;
      }
out:
      q->first_to_check=f_mod_no;

#ifdef QDIO_USE_PROCESSING_STATE
      if (last_position>=0)
            set_slsb(q, &last_position, SLSB_P_INPUT_PROCESSING, &count);
#endif /* QDIO_USE_PROCESSING_STATE */

      QDIO_DBF_HEX4(0,trace,&q->first_to_check,sizeof(int));

      return q->first_to_check;
}

static int
qdio_has_inbound_q_moved(struct qdio_q *q)
{
      int i;

      i=qdio_get_inbound_buffer_frontier(q);
      if ( (i!=GET_SAVED_FRONTIER(q)) ||
           (q->error_status_flags&QDIO_STATUS_LOOK_FOR_ERROR) ) {
            SAVE_FRONTIER(q,i);
            if ((!q->siga_sync)&&(!q->hydra_gives_outbound_pcis))
                  SAVE_TIMESTAMP(q);

            QDIO_DBF_TEXT4(0,trace,"inhasmvd");
            QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
            return 1;
      } else {
            QDIO_DBF_TEXT4(0,trace,"inhsntmv");
            QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
            return 0;
      }
}

/* means, no more buffers to be filled */
static int
tiqdio_is_inbound_q_done(struct qdio_q *q)
{
      int no_used;
      unsigned int start_buf, count;
      unsigned char state = 0;
      struct qdio_irq *irq = (struct qdio_irq *) q->irq_ptr;

#ifdef CONFIG_QDIO_DEBUG
      char dbf_text[15];
#endif

      no_used=atomic_read(&q->number_of_buffers_used);

      /* propagate the change from 82 to 80 through VM */
      SYNC_MEMORY;

#ifdef CONFIG_QDIO_DEBUG
      if (no_used) {
            sprintf(dbf_text,"iqisnt%02x",no_used);
            QDIO_DBF_TEXT4(0,trace,dbf_text);
      } else {
            QDIO_DBF_TEXT4(0,trace,"iniqisdo");
      }
      QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
#endif /* CONFIG_QDIO_DEBUG */

      if (!no_used)
            return 1;
      if (!q->siga_sync && !irq->is_qebsm)
            /* we'll check for more primed buffers in qeth_stop_polling */
            return 0;
      if (irq->is_qebsm) {
            count = 1;
            start_buf = q->first_to_check;
            qdio_do_eqbs(q, &state, &start_buf, &count);
      } else
            state = q->slsb.acc.val[q->first_to_check];
      if (state != SLSB_P_INPUT_PRIMED)
            /* 
             * nothing more to do, if next buffer is not PRIMED.
             * note that we did a SYNC_MEMORY before, that there
             * has been a sychnronization.
             * we will return 0 below, as there is nothing to do
             * (stop_polling not necessary, as we have not been
             * using the PROCESSING state 
             */
            return 0;

      /* 
       * ok, the next input buffer is primed. that means, that device state 
       * change indicator and adapter local summary are set, so we will find
       * it next time.
       * we will return 0 below, as there is nothing to do, except scheduling
       * ourselves for the next time. 
       */
      tiqdio_set_summary_bit((__u32*)q->dev_st_chg_ind);
      tiqdio_sched_tl();
      return 0;
}

static int
qdio_is_inbound_q_done(struct qdio_q *q)
{
      int no_used;
      unsigned int start_buf, count;
      unsigned char state = 0;
      struct qdio_irq *irq = (struct qdio_irq *) q->irq_ptr;

#ifdef CONFIG_QDIO_DEBUG
      char dbf_text[15];
#endif

      no_used=atomic_read(&q->number_of_buffers_used);

      /* 
       * we need that one for synchronization with the adapter, as it
       * does a kind of PCI avoidance 
       */
      SYNC_MEMORY;

      if (!no_used) {
            QDIO_DBF_TEXT4(0,trace,"inqisdnA");
            QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
            return 1;
      }
      if (irq->is_qebsm) {
            count = 1;
            start_buf = q->first_to_check;
            qdio_do_eqbs(q, &state, &start_buf, &count);
      } else
            state = q->slsb.acc.val[q->first_to_check];
      if (state == SLSB_P_INPUT_PRIMED) {
            /* we got something to do */
            QDIO_DBF_TEXT4(0,trace,"inqisntA");
            QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
            return 0;
      }

      /* on VM, we don't poll, so the q is always done here */
      if (q->siga_sync)
            return 1;
      if (q->hydra_gives_outbound_pcis)
            return 1;

      /* 
       * at this point we know, that inbound first_to_check
       * has (probably) not moved (see qdio_inbound_processing) 
       */
      if (NOW>GET_SAVED_TIMESTAMP(q)+q->timing.threshold) {
#ifdef CONFIG_QDIO_DEBUG
            QDIO_DBF_TEXT4(0,trace,"inqisdon");
            QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
            sprintf(dbf_text,"pf%02xcn%02x",q->first_to_check,no_used);
            QDIO_DBF_TEXT4(0,trace,dbf_text);
#endif /* CONFIG_QDIO_DEBUG */
            return 1;
      } else {
#ifdef CONFIG_QDIO_DEBUG
            QDIO_DBF_TEXT4(0,trace,"inqisntd");
            QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));
            sprintf(dbf_text,"pf%02xcn%02x",q->first_to_check,no_used);
            QDIO_DBF_TEXT4(0,trace,dbf_text);
#endif /* CONFIG_QDIO_DEBUG */
            return 0;
      }
}

static void
qdio_kick_inbound_handler(struct qdio_q *q)
{
      int count, start, end, real_end, i;
#ifdef CONFIG_QDIO_DEBUG
      char dbf_text[15];
#endif

      QDIO_DBF_TEXT4(0,trace,"kickinh");
      QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));

      start=q->first_element_to_kick;
      real_end=q->first_to_check;
      end=(real_end+QDIO_MAX_BUFFERS_PER_Q-1)&(QDIO_MAX_BUFFERS_PER_Q-1);
 
      i=start;
      count=0;
      while (1) {
            count++;
            if (i==end)
                  break;
            i=(i+1)&(QDIO_MAX_BUFFERS_PER_Q-1);
      }

#ifdef CONFIG_QDIO_DEBUG
      sprintf(dbf_text,"s=%2xc=%2x",start,count);
      QDIO_DBF_TEXT4(0,trace,dbf_text);
#endif /* CONFIG_QDIO_DEBUG */

      if (likely(q->state==QDIO_IRQ_STATE_ACTIVE))
            q->handler(q->cdev,
                     QDIO_STATUS_INBOUND_INT|q->error_status_flags,
                     q->qdio_error,q->siga_error,q->q_no,start,count,
                     q->int_parm);

      /* for the next time: */
      q->first_element_to_kick=real_end;
      q->qdio_error=0;
      q->siga_error=0;
      q->error_status_flags=0;

      qdio_perf_stat_inc(&perf_stats.inbound_cnt);
}

static void
__tiqdio_inbound_processing(struct qdio_q *q, int spare_ind_was_set)
{
      struct qdio_irq *irq_ptr;
      struct qdio_q *oq;
      int i;

      QDIO_DBF_TEXT4(0,trace,"iqinproc");
      QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));

      /* 
       * we first want to reserve the q, so that we know, that we don't
       * interrupt ourselves and call qdio_unmark_q, as is_in_shutdown might
       * be set 
       */
      if (unlikely(qdio_reserve_q(q))) {
            qdio_release_q(q);
            qdio_perf_stat_inc(&perf_stats.inbound_thin_tl_runs_resched);
            /* 
             * as we might just be about to stop polling, we make
             * sure that we check again at least once more 
             */
            tiqdio_sched_tl();
            return;
      }
      qdio_perf_stat_inc(&perf_stats.inbound_thin_tl_runs);
      if (unlikely(atomic_read(&q->is_in_shutdown))) {
            qdio_unmark_q(q);
            goto out;
      }

      /* 
       * we reset spare_ind_was_set, when the queue does not use the
       * spare indicator
       */
      if (spare_ind_was_set)
            spare_ind_was_set = (q->dev_st_chg_ind == &spare_indicator);

      if (!(*(q->dev_st_chg_ind)) && !spare_ind_was_set)
            goto out;
      /*
       * q->dev_st_chg_ind is the indicator, be it shared or not.
       * only clear it, if indicator is non-shared
       */
      if (!spare_ind_was_set)
            tiqdio_clear_summary_bit((__u32*)q->dev_st_chg_ind);

      if (q->hydra_gives_outbound_pcis) {
            if (!q->siga_sync_done_on_thinints) {
                  SYNC_MEMORY_ALL;
            } else if ((!q->siga_sync_done_on_outb_tis)&&
                   (q->hydra_gives_outbound_pcis)) {
                  SYNC_MEMORY_ALL_OUTB;
            }
      } else {
            SYNC_MEMORY;
      }
      /*
       * maybe we have to do work on our outbound queues... at least
       * we have to check the outbound-int-capable thinint-capable
       * queues
       */
      if (q->hydra_gives_outbound_pcis) {
            irq_ptr = (struct qdio_irq*)q->irq_ptr;
            for (i=0;i<irq_ptr->no_output_qs;i++) {
                  oq = irq_ptr->output_qs[i];
                  if (!qdio_is_outbound_q_done(oq)) {
                        qdio_perf_stat_dec(&perf_stats.tl_runs);
                        __qdio_outbound_processing(oq);
                  }
            }
      }

      if (!qdio_has_inbound_q_moved(q))
            goto out;

      qdio_kick_inbound_handler(q);
      if (tiqdio_is_inbound_q_done(q))
            if (!qdio_stop_polling(q)) {
                  /* 
                   * we set the flags to get into the stuff next time,
                   * see also comment in qdio_stop_polling 
                   */
                  tiqdio_set_summary_bit((__u32*)q->dev_st_chg_ind);
                  tiqdio_sched_tl();
            }
out:
      qdio_release_q(q);
}

static void
tiqdio_inbound_processing(unsigned long q)
{
      __tiqdio_inbound_processing((struct qdio_q *) q,
                            atomic_read(&spare_indicator_usecount));
}

static void
__qdio_inbound_processing(struct qdio_q *q)
{
      int q_laps=0;

      QDIO_DBF_TEXT4(0,trace,"qinproc");
      QDIO_DBF_HEX4(0,trace,&q,sizeof(void*));

      if (unlikely(qdio_reserve_q(q))) {
            qdio_release_q(q);
            qdio_perf_stat_inc(&perf_stats.inbound_tl_runs_resched);
            /* as we're sissies, we'll check next time */
            if (likely(!atomic_read(&q->is_in_shutdown))) {
                  qdio_mark_q(q);
                  QDIO_DBF_TEXT4(0,trace,"busy,agn");
            }
            return;
      }
      qdio_perf_stat_inc(&perf_stats.inbound_tl_runs);
      qdio_perf_stat_inc(&perf_stats.tl_runs);

again:
      if (qdio_has_inbound_q_moved(q)) {
            qdio_kick_inbound_handler(q);
            if (!qdio_stop_polling(q)) {
                  q_laps++;
                  if (q_laps<QDIO_Q_LAPS) 
                        goto again;
            }
            qdio_mark_q(q);
      } else {
            if (!qdio_is_inbound_q_done(q)) 
                        /* means poll time is not yet over */
                  qdio_mark_q(q);
      }

      qdio_release_q(q);
}

static void
qdio_inbound_processing(unsigned long q)
{
      __qdio_inbound_processing((struct qdio_q *) q);
}

/************************* MAIN ROUTINES *******************************/

#ifdef QDIO_USE_PROCESSING_STATE
static int
tiqdio_reset_processing_state(struct qdio_q *q, int q_laps)
{
      if (!q) {
            tiqdio_sched_tl();
            return 0;
      }

      /* 
       * under VM, we have not used the PROCESSING state, so no
       * need to stop polling 
       */
      if (q->siga_sync)
            return 2;

      if (unlikely(qdio_reserve_q(q))) {
            qdio_release_q(q);
            qdio_perf_stat_inc(&perf_stats.inbound_thin_tl_runs_resched);
            /* 
             * as we might just be about to stop polling, we make
             * sure that we check again at least once more 
             */
            
            /* 
             * sanity -- we'd get here without setting the
             * dev st chg ind 
             */
            tiqdio_set_summary_bit((__u32*)q->dev_st_chg_ind);
            tiqdio_sched_tl();
            return 0;
      }
      if (qdio_stop_polling(q)) {
            qdio_release_q(q);
            return 2;
      }           
      if (q_laps<QDIO_Q_LAPS-1) {
            qdio_release_q(q);
            return 3;
      }
      /* 
       * we set the flags to get into the stuff
       * next time, see also comment in qdio_stop_polling 
       */
      tiqdio_set_summary_bit((__u32*)q->dev_st_chg_ind);
      tiqdio_sched_tl();
      qdio_release_q(q);
      return 1;
      
}
#endif /* QDIO_USE_PROCESSING_STATE */

static void
tiqdio_inbound_checks(void)
{
      struct qdio_q *q;
      int spare_ind_was_set=0;
#ifdef QDIO_USE_PROCESSING_STATE
      int q_laps=0;
#endif /* QDIO_USE_PROCESSING_STATE */

      QDIO_DBF_TEXT4(0,trace,"iqdinbck");
      QDIO_DBF_TEXT5(0,trace,"iqlocsum");

#ifdef QDIO_USE_PROCESSING_STATE
again:
#endif /* QDIO_USE_PROCESSING_STATE */

      /* when the spare indicator is used and set, save that and clear it */
      if ((atomic_read(&spare_indicator_usecount)) && spare_indicator) {
            spare_ind_was_set = 1;
            tiqdio_clear_summary_bit((__u32*)&spare_indicator);
      }

      q=(struct qdio_q*)tiq_list;
      do {
            if (!q)
                  break;
            __tiqdio_inbound_processing(q, spare_ind_was_set);
            q=(struct qdio_q*)q->list_next;
      } while (q!=(struct qdio_q*)tiq_list);

#ifdef QDIO_USE_PROCESSING_STATE
      q=(struct qdio_q*)tiq_list;
      do {
            int ret;

            ret = tiqdio_reset_processing_state(q, q_laps);
            switch (ret) {
            case 0:
                  return;
            case 1:
                  q_laps++;
            case 2:
                  q = (struct qdio_q*)q->list_next;
                  break;
            default:
                  q_laps++;
                  goto again;
            }
      } while (q!=(struct qdio_q*)tiq_list);
#endif /* QDIO_USE_PROCESSING_STATE */
}

static void
tiqdio_tl(unsigned long data)
{
      QDIO_DBF_TEXT4(0,trace,"iqdio_tl");

      qdio_perf_stat_inc(&perf_stats.tl_runs);

      tiqdio_inbound_checks();
}

/********************* GENERAL HELPER_ROUTINES ***********************/

static void
qdio_release_irq_memory(struct qdio_irq *irq_ptr)
{
      int i;
      struct qdio_q *q;

      for (i = 0; i < QDIO_MAX_QUEUES_PER_IRQ; i++) {
            q = irq_ptr->input_qs[i];
            if (q) {
                  free_page((unsigned long) q->slib);
                  kmem_cache_free(qdio_q_cache, q);
            }
            q = irq_ptr->output_qs[i];
            if (q) {
                  free_page((unsigned long) q->slib);
                  kmem_cache_free(qdio_q_cache, q);
            }
      }
      free_page((unsigned long) irq_ptr->qdr);
      free_page((unsigned long) irq_ptr);
}

static void
qdio_set_impl_params(struct qdio_irq *irq_ptr,
                 unsigned int qib_param_field_format,
                 /* pointer to 128 bytes or NULL, if no param field */
                 unsigned char *qib_param_field,
                 /* pointer to no_queues*128 words of data or NULL */
                 unsigned int no_input_qs,
                 unsigned int no_output_qs,
                 unsigned long *input_slib_elements,
                 unsigned long *output_slib_elements)
{
      int i,j;

      if (!irq_ptr)
            return;

      irq_ptr->qib.pfmt=qib_param_field_format;
      if (qib_param_field)
            memcpy(irq_ptr->qib.parm,qib_param_field,
                   QDIO_MAX_BUFFERS_PER_Q);

      if (input_slib_elements)
            for (i=0;i<no_input_qs;i++) {
                  for (j=0;j<QDIO_MAX_BUFFERS_PER_Q;j++)
                        irq_ptr->input_qs[i]->slib->slibe[j].parms=
                              input_slib_elements[
                                    i*QDIO_MAX_BUFFERS_PER_Q+j];
            }
      if (output_slib_elements)
            for (i=0;i<no_output_qs;i++) {
                  for (j=0;j<QDIO_MAX_BUFFERS_PER_Q;j++)
                        irq_ptr->output_qs[i]->slib->slibe[j].parms=
                              output_slib_elements[
                                    i*QDIO_MAX_BUFFERS_PER_Q+j];
            }
}

static int
qdio_alloc_qs(struct qdio_irq *irq_ptr,
            int no_input_qs, int no_output_qs)
{
      int i;
      struct qdio_q *q;

      for (i = 0; i < no_input_qs; i++) {
            q = kmem_cache_alloc(qdio_q_cache, GFP_KERNEL);
            if (!q)
                  return -ENOMEM;
            memset(q, 0, sizeof(*q));

            q->slib = (struct slib *) __get_free_page(GFP_KERNEL);
            if (!q->slib) {
                  kmem_cache_free(qdio_q_cache, q);
                  return -ENOMEM;
            }
            irq_ptr->input_qs[i]=q;
      }

      for (i = 0; i < no_output_qs; i++) {
            q = kmem_cache_alloc(qdio_q_cache, GFP_KERNEL);
            if (!q)
                  return -ENOMEM;
            memset(q, 0, sizeof(*q));

            q->slib = (struct slib *) __get_free_page(GFP_KERNEL);
            if (!q->slib) {
                  kmem_cache_free(qdio_q_cache, q);
                  return -ENOMEM;
            }
            irq_ptr->output_qs[i]=q;
      }
      return 0;
}

static void
qdio_fill_qs(struct qdio_irq *irq_ptr, struct ccw_device *cdev,
                 int no_input_qs, int no_output_qs,
           qdio_handler_t *input_handler,
           qdio_handler_t *output_handler,
           unsigned long int_parm,int q_format,
           unsigned long flags,
           void **inbound_sbals_array,
           void **outbound_sbals_array)
{
      struct qdio_q *q;
      int i,j;
      char dbf_text[20]; /* see qdio_initialize */
      void *ptr;
      int available;

      sprintf(dbf_text,"qfqs%4x",cdev->private->schid.sch_no);
      QDIO_DBF_TEXT0(0,setup,dbf_text);
      for (i=0;i<no_input_qs;i++) {
            q=irq_ptr->input_qs[i];

            memset(q,0,((char*)&q->slib)-((char*)q));
            sprintf(dbf_text,"in-q%4x",i);
            QDIO_DBF_TEXT0(0,setup,dbf_text);
            QDIO_DBF_HEX0(0,setup,&q,sizeof(void*));

            memset(q->slib,0,PAGE_SIZE);
            q->sl=(struct sl*)(((char*)q->slib)+PAGE_SIZE/2);

            available=0;

            for (j=0;j<QDIO_MAX_BUFFERS_PER_Q;j++)
                  q->sbal[j]=*(inbound_sbals_array++);

                q->queue_type=q_format;
            q->int_parm=int_parm;
            q->schid = irq_ptr->schid;
            q->irq_ptr = irq_ptr;
            q->cdev = cdev;
            q->mask=1<<(31-i);
            q->q_no=i;
            q->is_input_q=1;
            q->first_to_check=0;
            q->last_move_ftc=0;
            q->handler=input_handler;
            q->dev_st_chg_ind=irq_ptr->dev_st_chg_ind;

            /* q->is_thinint_q isn't valid at this time, but
             * irq_ptr->is_thinint_irq is
             */
            if (irq_ptr->is_thinint_irq)
                  tasklet_init(&q->tasklet, tiqdio_inbound_processing,
                             (unsigned long) q);
            else
                  tasklet_init(&q->tasklet, qdio_inbound_processing,
                             (unsigned long) q);

            /* actually this is not used for inbound queues. yet. */
            atomic_set(&q->busy_siga_counter,0);
            q->timing.busy_start=0;

/*          for (j=0;j<QDIO_STATS_NUMBER;j++)
                  q->timing.last_transfer_times[j]=(qdio_get_micros()/
                                            QDIO_STATS_NUMBER)*j;
            q->timing.last_transfer_index=QDIO_STATS_NUMBER-1;
*/

            /* fill in slib */
            if (i>0) irq_ptr->input_qs[i-1]->slib->nsliba=
                         (unsigned long)(q->slib);
            q->slib->sla=(unsigned long)(q->sl);
            q->slib->slsba=(unsigned long)(&q->slsb.acc.val[0]);

            /* fill in sl */
            for (j=0;j<QDIO_MAX_BUFFERS_PER_Q;j++)
                  q->sl->element[j].sbal=(unsigned long)(q->sbal[j]);

            QDIO_DBF_TEXT2(0,setup,"sl-sb-b0");
            ptr=(void*)q->sl;
            QDIO_DBF_HEX2(0,setup,&ptr,sizeof(void*));
            ptr=(void*)&q->slsb;
            QDIO_DBF_HEX2(0,setup,&ptr,sizeof(void*));
            ptr=(void*)q->sbal[0];
            QDIO_DBF_HEX2(0,setup,&ptr,sizeof(void*));

            /* fill in slsb */
            if (!irq_ptr->is_qebsm) {
                        unsigned int count = 1;
                        for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; j++)
                                set_slsb(q, &j, SLSB_P_INPUT_NOT_INIT, &count);
                }
      }

      for (i=0;i<no_output_qs;i++) {
            q=irq_ptr->output_qs[i];
            memset(q,0,((char*)&q->slib)-((char*)q));

            sprintf(dbf_text,"outq%4x",i);
            QDIO_DBF_TEXT0(0,setup,dbf_text);
            QDIO_DBF_HEX0(0,setup,&q,sizeof(void*));

            memset(q->slib,0,PAGE_SIZE);
            q->sl=(struct sl*)(((char*)q->slib)+PAGE_SIZE/2);

            available=0;
            
            for (j=0;j<QDIO_MAX_BUFFERS_PER_Q;j++)
                  q->sbal[j]=*(outbound_sbals_array++);

                q->queue_type=q_format;
            if ((q->queue_type == QDIO_IQDIO_QFMT) &&
                (no_output_qs > 1) &&
                (i == no_output_qs-1))
                  q->queue_type = QDIO_IQDIO_QFMT_ASYNCH;
            q->int_parm=int_parm;
            q->is_input_q=0;
            q->is_pci_out = 0;
            q->schid = irq_ptr->schid;
            q->cdev = cdev;
            q->irq_ptr = irq_ptr;
            q->mask=1<<(31-i);
            q->q_no=i;
            q->first_to_check=0;
            q->last_move_ftc=0;
            q->handler=output_handler;

            tasklet_init(&q->tasklet, qdio_outbound_processing,
                       (unsigned long) q);
            setup_timer(&q->timer, qdio_outbound_processing,
                      (unsigned long) q);

            atomic_set(&q->busy_siga_counter,0);
            q->timing.busy_start=0;

            /* fill in slib */
            if (i>0) irq_ptr->output_qs[i-1]->slib->nsliba=
                         (unsigned long)(q->slib);
            q->slib->sla=(unsigned long)(q->sl);
            q->slib->slsba=(unsigned long)(&q->slsb.acc.val[0]);

            /* fill in sl */
            for (j=0;j<QDIO_MAX_BUFFERS_PER_Q;j++)
                  q->sl->element[j].sbal=(unsigned long)(q->sbal[j]);

            QDIO_DBF_TEXT2(0,setup,"sl-sb-b0");
            ptr=(void*)q->sl;
            QDIO_DBF_HEX2(0,setup,&ptr,sizeof(void*));
            ptr=(void*)&q->slsb;
            QDIO_DBF_HEX2(0,setup,&ptr,sizeof(void*));
            ptr=(void*)q->sbal[0];
            QDIO_DBF_HEX2(0,setup,&ptr,sizeof(void*));

            /* fill in slsb */
                if (!irq_ptr->is_qebsm) {
                        unsigned int count = 1;
                        for (j = 0; j < QDIO_MAX_BUFFERS_PER_Q; j++)
                                set_slsb(q, &j, SLSB_P_OUTPUT_NOT_INIT, &count);
                }
      }
}

static void
qdio_fill_thresholds(struct qdio_irq *irq_ptr,
                 unsigned int no_input_qs,
                 unsigned int no_output_qs,
                 unsigned int min_input_threshold,
                 unsigned int max_input_threshold,
                 unsigned int min_output_threshold,
                 unsigned int max_output_threshold)
{
      int i;
      struct qdio_q *q;

      for (i=0;i<no_input_qs;i++) {
            q=irq_ptr->input_qs[i];
            q->timing.threshold=max_input_threshold;
/*          for (j=0;j<QDIO_STATS_CLASSES;j++) {
                  q->threshold_classes[j].threshold=
                        min_input_threshold+
                        (max_input_threshold-min_input_threshold)/
                        QDIO_STATS_CLASSES;
            }
            qdio_use_thresholds(q,QDIO_STATS_CLASSES/2);*/
      }
      for (i=0;i<no_output_qs;i++) {
            q=irq_ptr->output_qs[i];
            q->timing.threshold=max_output_threshold;
/*          for (j=0;j<QDIO_STATS_CLASSES;j++) {
                  q->threshold_classes[j].threshold=
                        min_output_threshold+
                        (max_output_threshold-min_output_threshold)/
                        QDIO_STATS_CLASSES;
            }
            qdio_use_thresholds(q,QDIO_STATS_CLASSES/2);*/
      }
}

static int
tiqdio_thinint_handler(void)
{
      QDIO_DBF_TEXT4(0,trace,"thin_int");

      qdio_perf_stat_inc(&perf_stats.thinints);

      /* SVS only when needed:
       * issue SVS to benefit from iqdio interrupt avoidance
       * (SVS clears AISOI)*/
      if (!omit_svs)
            tiqdio_clear_global_summary();

      tiqdio_inbound_checks();
      return 0;
}

static void
qdio_set_state(struct qdio_irq *irq_ptr, enum qdio_irq_states state)
{
      int i;
#ifdef CONFIG_QDIO_DEBUG
      char dbf_text[15];

      QDIO_DBF_TEXT5(0,trace,"newstate");
      sprintf(dbf_text,"%4x%4x",irq_ptr->schid.sch_no,state);
      QDIO_DBF_TEXT5(0,trace,dbf_text);
#endif /* CONFIG_QDIO_DEBUG */

      irq_ptr->state=state;
      for (i=0;i<irq_ptr->no_input_qs;i++)
            irq_ptr->input_qs[i]->state=state;
      for (i=0;i<irq_ptr->no_output_qs;i++)
            irq_ptr->output_qs[i]->state=state;
      mb();
}

static void
qdio_irq_check_sense(struct subchannel_id schid, struct irb *irb)
{
      char dbf_text[15];

      if (irb->esw.esw0.erw.cons) {
            sprintf(dbf_text,"sens%4x",schid.sch_no);
            QDIO_DBF_TEXT2(1,trace,dbf_text);
            QDIO_DBF_HEX0(0,sense,irb,QDIO_DBF_SENSE_LEN);

            QDIO_PRINT_WARN("sense data available on qdio channel.\n");
            QDIO_HEXDUMP16(WARN,"irb: ",irb);
            QDIO_HEXDUMP16(WARN,"sense data: ",irb->ecw);
      }
            
}

static void
qdio_handle_pci(struct qdio_irq *irq_ptr)
{
      int i;
      struct qdio_q *q;

      qdio_perf_stat_inc(&perf_stats.pcis);
      for (i=0;i<irq_ptr->no_input_qs;i++) {
            q=irq_ptr->input_qs[i];
            if (q->is_input_q&QDIO_FLAG_NO_INPUT_INTERRUPT_CONTEXT)
                  qdio_mark_q(q);
            else {
                  qdio_perf_stat_dec(&perf_stats.tl_runs);
                  __qdio_inbound_processing(q);
            }
      }
      if (!irq_ptr->hydra_gives_outbound_pcis)
            return;
      for (i=0;i<irq_ptr->no_output_qs;i++) {
            q=irq_ptr->output_qs[i];
            if (qdio_is_outbound_q_done(q))
                  continue;
            qdio_perf_stat_dec(&perf_stats.tl_runs);
            if (!irq_ptr->sync_done_on_outb_pcis)
                  SYNC_MEMORY;
            __qdio_outbound_processing(q);
      }
}

static void qdio_establish_handle_irq(struct ccw_device*, int, int);

static void
qdio_handle_activate_check(struct ccw_device *cdev, unsigned long intparm,
                     int cstat, int dstat)
{
      struct qdio_irq *irq_ptr;
      struct qdio_q *q;
      char dbf_text[15];

      irq_ptr = cdev->private->qdio_data;

      QDIO_DBF_TEXT2(1, trace, "ick2");
      sprintf(dbf_text,"%s", cdev->dev.bus_id);
      QDIO_DBF_TEXT2(1,trace,dbf_text);
      QDIO_DBF_HEX2(0,trace,&intparm,sizeof(int));
      QDIO_DBF_HEX2(0,trace,&dstat,sizeof(int));
      QDIO_DBF_HEX2(0,trace,&cstat,sizeof(int));
      QDIO_PRINT_ERR("received check condition on activate " \
                   "queues on device %s (cs=x%x, ds=x%x).\n",
                   cdev->dev.bus_id, cstat, dstat);
      if (irq_ptr->no_input_qs) {
            q=irq_ptr->input_qs[0];
      } else if (irq_ptr->no_output_qs) {
            q=irq_ptr->output_qs[0];
      } else {
            QDIO_PRINT_ERR("oops... no queue registered for device %s!?\n",
                         cdev->dev.bus_id);
            goto omit_handler_call;
      }
      q->handler(q->cdev,QDIO_STATUS_ACTIVATE_CHECK_CONDITION|
               QDIO_STATUS_LOOK_FOR_ERROR,
               0,0,0,-1,-1,q->int_parm);
omit_handler_call:
      qdio_set_state(irq_ptr,QDIO_IRQ_STATE_STOPPED);

}

static void
qdio_call_shutdown(struct work_struct *work)
{
      struct ccw_device_private *priv;
      struct ccw_device *cdev;

      priv = container_of(work, struct ccw_device_private, kick_work);
      cdev = priv->cdev;
      qdio_shutdown(cdev, QDIO_FLAG_CLEANUP_USING_CLEAR);
      put_device(&cdev->dev);
}

static void
qdio_timeout_handler(struct ccw_device *cdev)
{
      struct qdio_irq *irq_ptr;
      char dbf_text[15];

      QDIO_DBF_TEXT2(0, trace, "qtoh");
      sprintf(dbf_text, "%s", cdev->dev.bus_id);
      QDIO_DBF_TEXT2(0, trace, dbf_text);

      irq_ptr = cdev->private->qdio_data;
      sprintf(dbf_text, "state:%d", irq_ptr->state);
      QDIO_DBF_TEXT2(0, trace, dbf_text);

      switch (irq_ptr->state) {
      case QDIO_IRQ_STATE_INACTIVE:
            QDIO_PRINT_ERR("establish queues on irq 0.%x.%04x: timed out\n",
                         irq_ptr->schid.ssid, irq_ptr->schid.sch_no);
            QDIO_DBF_TEXT2(1,setup,"eq:timeo");
            qdio_set_state(irq_ptr, QDIO_IRQ_STATE_ERR);
            break;
      case QDIO_IRQ_STATE_CLEANUP:
            QDIO_PRINT_INFO("Did not get interrupt on cleanup, "
                        "irq=0.%x.%x.\n",
                        irq_ptr->schid.ssid, irq_ptr->schid.sch_no);
            qdio_set_state(irq_ptr, QDIO_IRQ_STATE_ERR);
            break;
      case QDIO_IRQ_STATE_ESTABLISHED:
      case QDIO_IRQ_STATE_ACTIVE:
            /* I/O has been terminated by common I/O layer. */
            QDIO_PRINT_INFO("Queues on irq 0.%x.%04x killed by cio.\n",
                        irq_ptr->schid.ssid, irq_ptr->schid.sch_no);
            QDIO_DBF_TEXT2(1, trace, "cio:term");
            qdio_set_state(irq_ptr, QDIO_IRQ_STATE_STOPPED);
            if (get_device(&cdev->dev)) {
                  /* Can't call shutdown from interrupt context. */
                  PREPARE_WORK(&cdev->private->kick_work,
                             qdio_call_shutdown);
                  queue_work(ccw_device_work, &cdev->private->kick_work);
            }
            break;
      default:
            BUG();
      }
      ccw_device_set_timeout(cdev, 0);
      wake_up(&cdev->private->wait_q);
}

static void
qdio_handler(struct ccw_device *cdev, unsigned long intparm, struct irb *irb)
{
      struct qdio_irq *irq_ptr;
      int cstat,dstat;
      char dbf_text[15];

#ifdef CONFIG_QDIO_DEBUG
      QDIO_DBF_TEXT4(0, trace, "qint");
      sprintf(dbf_text, "%s", cdev->dev.bus_id);
      QDIO_DBF_TEXT4(0, trace, dbf_text);
#endif /* CONFIG_QDIO_DEBUG */
      
      if (!intparm) {
            QDIO_PRINT_ERR("got unsolicited interrupt in qdio " \
                          "handler, device %s\n", cdev->dev.bus_id);
            return;
      }

      irq_ptr = cdev->private->qdio_data;
      if (!irq_ptr) {
            QDIO_DBF_TEXT2(1, trace, "uint");
            sprintf(dbf_text,"%s", cdev->dev.bus_id);
            QDIO_DBF_TEXT2(1,trace,dbf_text);
            QDIO_PRINT_ERR("received interrupt on unused device %s!\n",
                         cdev->dev.bus_id);
            return;
      }

      if (IS_ERR(irb)) {
            /* Currently running i/o is in error. */
            switch (PTR_ERR(irb)) {
            case -EIO:
                  QDIO_PRINT_ERR("i/o error on device %s\n",
                               cdev->dev.bus_id);
                  return;
            case -ETIMEDOUT:
                  qdio_timeout_handler(cdev);
                  return;
            default:
                  QDIO_PRINT_ERR("unknown error state %ld on device %s\n",
                               PTR_ERR(irb), cdev->dev.bus_id);
                  return;
            }
      }

      qdio_irq_check_sense(irq_ptr->schid, irb);

#ifdef CONFIG_QDIO_DEBUG
      sprintf(dbf_text, "state:%d", irq_ptr->state);
      QDIO_DBF_TEXT4(0, trace, dbf_text);
#endif /* CONFIG_QDIO_DEBUG */

        cstat = irb->scsw.cstat;
        dstat = irb->scsw.dstat;

      switch (irq_ptr->state) {
      case QDIO_IRQ_STATE_INACTIVE:
            qdio_establish_handle_irq(cdev, cstat, dstat);
            break;

      case QDIO_IRQ_STATE_CLEANUP:
            qdio_set_state(irq_ptr, QDIO_IRQ_STATE_INACTIVE);
            break;

      case QDIO_IRQ_STATE_ESTABLISHED:
      case QDIO_IRQ_STATE_ACTIVE:
            if (cstat & SCHN_STAT_PCI) {
                  qdio_handle_pci(irq_ptr);
                  break;
            }

            if ((cstat&~SCHN_STAT_PCI)||dstat) {
                  qdio_handle_activate_check(cdev, intparm, cstat, dstat);
                  break;
            }
      default:
            QDIO_PRINT_ERR("got interrupt for queues in state %d on " \
                         "device %s?!\n",
                         irq_ptr->state, cdev->dev.bus_id);
      }
      wake_up(&cdev->private->wait_q);

}

int
qdio_synchronize(struct ccw_device *cdev, unsigned int flags,
             unsigned int queue_number)
{
      int cc = 0;
      struct qdio_q *q;
      struct qdio_irq *irq_ptr;
      void *ptr;
#ifdef CONFIG_QDIO_DEBUG
      char dbf_text[15]="SyncXXXX";
#endif

      irq_ptr = cdev->private->qdio_data;
      if (!irq_ptr)
            return -ENODEV;

#ifdef CONFIG_QDIO_DEBUG
      *((int*)(&dbf_text[4])) = irq_ptr->schid.sch_no;
      QDIO_DBF_HEX4(0,trace,dbf_text,QDIO_DBF_TRACE_LEN);
      *((int*)(&dbf_text[0]))=flags;
      *((int*)(&dbf_text[4]))=queue_number;
      QDIO_DBF_HEX4(0,trace,dbf_text,QDIO_DBF_TRACE_LEN);
#endif /* CONFIG_QDIO_DEBUG */

      if (flags&QDIO_FLAG_SYNC_INPUT) {
            q=irq_ptr->input_qs[queue_number];
            if (!q)
                  return -EINVAL;
            if (!(irq_ptr->is_qebsm))
                  cc = do_siga_sync(q->schid, 0, q->mask);
      } else if (flags&QDIO_FLAG_SYNC_OUTPUT) {
            q=irq_ptr->output_qs[queue_number];
            if (!q)
                  return -EINVAL;
            if (!(irq_ptr->is_qebsm))
                  cc = do_siga_sync(q->schid, q->mask, 0);
      } else 
            return -EINVAL;

      ptr=&cc;
      if (cc)
            QDIO_DBF_HEX3(0,trace,&ptr,sizeof(int));

      return cc;
}

static void
qdio_check_subchannel_qebsm(struct qdio_irq *irq_ptr, unsigned char qdioac,
                      unsigned long token)
{
      struct qdio_q *q;
      int i;
      unsigned int count, start_buf;
      char dbf_text[15];

      /*check if QEBSM is disabled */
      if (!(irq_ptr->is_qebsm) || !(qdioac & 0x01)) {
            irq_ptr->is_qebsm  = 0;
            irq_ptr->sch_token = 0;
            irq_ptr->qib.rflags &= ~QIB_RFLAGS_ENABLE_QEBSM;
            QDIO_DBF_TEXT0(0,setup,"noV=V");
            return;
      }
      irq_ptr->sch_token = token;
      /*input queue*/
      for (i = 0; i < irq_ptr->no_input_qs;i++) {
            q = irq_ptr->input_qs[i];
            count = QDIO_MAX_BUFFERS_PER_Q;
            start_buf = 0;
            set_slsb(q, &start_buf, SLSB_P_INPUT_NOT_INIT, &count);
      }
      sprintf(dbf_text,"V=V:%2x",irq_ptr->is_qebsm);
      QDIO_DBF_TEXT0(0,setup,dbf_text);
      sprintf(dbf_text,"%8lx",irq_ptr->sch_token);
      QDIO_DBF_TEXT0(0,setup,dbf_text);
      /*output queue*/
      for (i = 0; i < irq_ptr->no_output_qs; i++) {
            q = irq_ptr->output_qs[i];
            count = QDIO_MAX_BUFFERS_PER_Q;
            start_buf = 0;
            set_slsb(q, &start_buf, SLSB_P_OUTPUT_NOT_INIT, &count);
      }
}

static void
qdio_get_ssqd_information(struct qdio_irq *irq_ptr)
{
      int result;
      unsigned char qdioac;
      struct {
            struct chsc_header request;
            u16 reserved1:10;
            u16 ssid:2;
            u16 fmt:4;
            u16 first_sch;
            u16 reserved2;
            u16 last_sch;
            u32 reserved3;
            struct chsc_header response;
            u32 reserved4;
            u8  flags;
            u8  reserved5;
            u16 sch;
            u8  qfmt;
            u8  parm;
            u8  qdioac1;
            u8  sch_class;
            u8  reserved7;
            u8  icnt;
            u8  reserved8;
            u8  ocnt;
            u8 reserved9;
            u8 mbccnt;
            u16 qdioac2;
            u64 sch_token;
      } *ssqd_area;

      QDIO_DBF_TEXT0(0,setup,"getssqd");
      qdioac = 0;
      ssqd_area = mempool_alloc(qdio_mempool_scssc, GFP_ATOMIC);
      if (!ssqd_area) {
              QDIO_PRINT_WARN("Could not get memory for chsc. Using all " \
                        "SIGAs for sch x%x.\n", irq_ptr->schid.sch_no);
            irq_ptr->qdioac = CHSC_FLAG_SIGA_INPUT_NECESSARY |
                          CHSC_FLAG_SIGA_OUTPUT_NECESSARY |
                          CHSC_FLAG_SIGA_SYNC_NECESSARY; /* all flags set */
            irq_ptr->is_qebsm = 0;
            irq_ptr->sch_token = 0;
            irq_ptr->qib.rflags &= ~QIB_RFLAGS_ENABLE_QEBSM;
            return;
      }

      ssqd_area->request = (struct chsc_header) {
            .length = 0x0010,
            .code   = 0x0024,
      };
      ssqd_area->first_sch = irq_ptr->schid.sch_no;
      ssqd_area->last_sch = irq_ptr->schid.sch_no;
      ssqd_area->ssid = irq_ptr->schid.ssid;
      result = chsc(ssqd_area);

      if (result) {
            QDIO_PRINT_WARN("CHSC returned cc %i. Using all " \
                        "SIGAs for sch 0.%x.%x.\n", result,
                        irq_ptr->schid.ssid, irq_ptr->schid.sch_no);
            qdioac = CHSC_FLAG_SIGA_INPUT_NECESSARY |
                  CHSC_FLAG_SIGA_OUTPUT_NECESSARY |
                  CHSC_FLAG_SIGA_SYNC_NECESSARY; /* all flags set */
            irq_ptr->is_qebsm  = 0;
            goto out;
      }

      if (ssqd_area->response.code != QDIO_CHSC_RESPONSE_CODE_OK) {
            QDIO_PRINT_WARN("response upon checking SIGA needs " \
                        "is 0x%x. Using all SIGAs for sch 0.%x.%x.\n",
                        ssqd_area->response.code,
                        irq_ptr->schid.ssid, irq_ptr->schid.sch_no);
            qdioac = CHSC_FLAG_SIGA_INPUT_NECESSARY |
                  CHSC_FLAG_SIGA_OUTPUT_NECESSARY |
                  CHSC_FLAG_SIGA_SYNC_NECESSARY; /* all flags set */
            irq_ptr->is_qebsm  = 0;
            goto out;
      }
      if (!(ssqd_area->flags & CHSC_FLAG_QDIO_CAPABILITY) ||
          !(ssqd_area->flags & CHSC_FLAG_VALIDITY) ||
          (ssqd_area->sch != irq_ptr->schid.sch_no)) {
            QDIO_PRINT_WARN("huh? problems checking out sch 0.%x.%x... " \
                        "using all SIGAs.\n",
                        irq_ptr->schid.ssid, irq_ptr->schid.sch_no);
            qdioac = CHSC_FLAG_SIGA_INPUT_NECESSARY |
                  CHSC_FLAG_SIGA_OUTPUT_NECESSARY |
                  CHSC_FLAG_SIGA_SYNC_NECESSARY; /* worst case */
            irq_ptr->is_qebsm  = 0;
            goto out;
      }
      qdioac = ssqd_area->qdioac1;
out:
      qdio_check_subchannel_qebsm(irq_ptr, qdioac,
                            ssqd_area->sch_token);
      mempool_free(ssqd_area, qdio_mempool_scssc);
      irq_ptr->qdioac = qdioac;
}

static unsigned int
tiqdio_check_chsc_availability(void)
{
      char dbf_text[15];

      if (!css_characteristics_avail)
            return -EIO;

      /* Check for bit 41. */
      if (!css_general_characteristics.aif) {
            QDIO_PRINT_WARN("Adapter interruption facility not " \
                        "installed.\n");
            return -ENOENT;
      }

      /* Check for bits 107 and 108. */
      if (!css_chsc_characteristics.scssc ||
          !css_chsc_characteristics.scsscf) {
            QDIO_PRINT_WARN("Set Chan Subsys. Char. & Fast-CHSCs " \
                        "not available.\n");
            return -ENOENT;
      }

      /* Check for OSA/FCP thin interrupts (bit 67). */
      hydra_thinints = css_general_characteristics.aif_osa;
      sprintf(dbf_text,"hydrati%1x", hydra_thinints);
      QDIO_DBF_TEXT0(0,setup,dbf_text);

#ifdef CONFIG_64BIT
      /* Check for QEBSM support in general (bit 58). */
      is_passthrough = css_general_characteristics.qebsm;
#endif
      sprintf(dbf_text,"cssQBS:%1x", is_passthrough);
      QDIO_DBF_TEXT0(0,setup,dbf_text);

      /* Check for aif time delay disablement fac (bit 56). If installed,
       * omit svs even under lpar (good point by rick again) */
      omit_svs = css_general_characteristics.aif_tdd;
      sprintf(dbf_text,"omitsvs%1x", omit_svs);
      QDIO_DBF_TEXT0(0,setup,dbf_text);
      return 0;
}


static unsigned int
tiqdio_set_subchannel_ind(struct qdio_irq *irq_ptr, int reset_to_zero)
{
      unsigned long real_addr_local_summary_bit;
      unsigned long real_addr_dev_st_chg_ind;
      void *ptr;
      char dbf_text[15];

      unsigned int resp_code;
      int result;

      struct {
            struct chsc_header request;
            u16 operation_code;
            u16 reserved1;
            u32 reserved2;
            u32 reserved3;
            u64 summary_indicator_addr;
            u64 subchannel_indicator_addr;
            u32 ks:4;
            u32 kc:4;
            u32 reserved4:21;
            u32 isc:3;
            u32 word_with_d_bit;
            /* set to 0x10000000 to enable
             * time delay disablement facility */
            u32 reserved5;
            struct subchannel_id schid;
            u32 reserved6[1004];
            struct chsc_header response;
            u32 reserved7;
      } *scssc_area;

      if (!irq_ptr->is_thinint_irq)
            return -ENODEV;

      if (reset_to_zero) {
            real_addr_local_summary_bit=0;
            real_addr_dev_st_chg_ind=0;
      } else {
            real_addr_local_summary_bit=
                  virt_to_phys((volatile void *)indicators);
            real_addr_dev_st_chg_ind=
                  virt_to_phys((volatile void *)irq_ptr->dev_st_chg_ind);
      }

      scssc_area = mempool_alloc(qdio_mempool_scssc, GFP_ATOMIC);
      if (!scssc_area) {
            QDIO_PRINT_WARN("No memory for setting indicators on " \
                        "subchannel 0.%x.%x.\n",
                        irq_ptr->schid.ssid, irq_ptr->schid.sch_no);
            return -ENOMEM;
      }
      scssc_area->request = (struct chsc_header) {
            .length = 0x0fe0,
            .code   = 0x0021,
      };
      scssc_area->operation_code = 0;

        scssc_area->summary_indicator_addr = real_addr_local_summary_bit;
      scssc_area->subchannel_indicator_addr = real_addr_dev_st_chg_ind;
      scssc_area->ks = QDIO_STORAGE_KEY;
      scssc_area->kc = QDIO_STORAGE_KEY;
      scssc_area->isc = TIQDIO_THININT_ISC;
      scssc_area->schid = irq_ptr->schid;
      /* enables the time delay disablement facility. Don't care
       * whether it is really there (i.e. we haven't checked for
       * it) */
      if (css_general_characteristics.aif_tdd)
            scssc_area->word_with_d_bit = 0x10000000;
      else
            QDIO_PRINT_WARN("Time delay disablement facility " \
                        "not available\n");

      result = chsc(scssc_area);
      if (result) {
            QDIO_PRINT_WARN("could not set indicators on irq 0.%x.%x, " \
                        "cc=%i.\n",
                        irq_ptr->schid.ssid, irq_ptr->schid.sch_no,result);
            result = -EIO;
            goto out;
      }

      resp_code = scssc_area->response.code;
      if (resp_code!=QDIO_CHSC_RESPONSE_CODE_OK) {
            QDIO_PRINT_WARN("response upon setting indicators " \
                        "is 0x%x.\n",resp_code);
            sprintf(dbf_text,"sidR%4x",resp_code);
            QDIO_DBF_TEXT1(0,trace,dbf_text);
            QDIO_DBF_TEXT1(0,setup,dbf_text);
            ptr=&scssc_area->response;
            QDIO_DBF_HEX2(1,setup,&ptr,QDIO_DBF_SETUP_LEN);
            result = -EIO;
            goto out;
      }

      QDIO_DBF_TEXT2(0,setup,"setscind");
      QDIO_DBF_HEX2(0,setup,&real_addr_local_summary_bit,
                  sizeof(unsigned long));
      QDIO_DBF_HEX2(0,setup,&real_addr_dev_st_chg_ind,sizeof(unsigned long));
      result = 0;
out:
      mempool_free(scssc_area, qdio_mempool_scssc);
      return result;

}

static unsigned int
tiqdio_set_delay_target(struct qdio_irq *irq_ptr, unsigned long delay_target)
{
      unsigned int resp_code;
      int result;
      void *ptr;
      char dbf_text[15];

      struct {
            struct chsc_header request;
            u16 operation_code;
            u16 reserved1;
            u32 reserved2;
            u32 reserved3;
            u32 reserved4[2];
            u32 delay_target;
            u32 reserved5[1009];
            struct chsc_header response;
            u32 reserved6;
      } *scsscf_area;

      if (!irq_ptr->is_thinint_irq)
            return -ENODEV;

      scsscf_area = mempool_alloc(qdio_mempool_scssc, GFP_ATOMIC);
      if (!scsscf_area) {
            QDIO_PRINT_WARN("No memory for setting delay target on " \
                        "subchannel 0.%x.%x.\n",
                        irq_ptr->schid.ssid, irq_ptr->schid.sch_no);
            return -ENOMEM;
      }
      scsscf_area->request = (struct chsc_header) {
            .length = 0x0fe0,
            .code   = 0x1027,
      };

      scsscf_area->delay_target = delay_target<<16;

      result=chsc(scsscf_area);
      if (result) {
            QDIO_PRINT_WARN("could not set delay target on irq 0.%x.%x, " \
                        "cc=%i. Continuing.\n",
                        irq_ptr->schid.ssid, irq_ptr->schid.sch_no,
                        result);
            result = -EIO;
            goto out;
      }

      resp_code = scsscf_area->response.code;
      if (resp_code!=QDIO_CHSC_RESPONSE_CODE_OK) {
            QDIO_PRINT_WARN("response upon setting delay target " \
                        "is 0x%x. Continuing.\n",resp_code);
            sprintf(dbf_text,"sdtR%4x",resp_code);
            QDIO_DBF_TEXT1(0,trace,dbf_text);
            QDIO_DBF_TEXT1(0,setup,dbf_text);
            ptr=&scsscf_area->response;
            QDIO_DBF_HEX2(1,trace,&ptr,QDIO_DBF_TRACE_LEN);
      }
      QDIO_DBF_TEXT2(0,trace,"delytrgt");
      QDIO_DBF_HEX2(0,trace,&delay_target,sizeof(unsigned long));
      result = 0; /* not critical */
out:
      mempool_free(scsscf_area, qdio_mempool_scssc);
      return result;
}

int
qdio_cleanup(struct ccw_device *cdev, int how)
{
      struct qdio_irq *irq_ptr;
      char dbf_text[15];
      int rc;

      irq_ptr = cdev->private->qdio_data;
      if (!irq_ptr)
            return -ENODEV;

      sprintf(dbf_text,"qcln%4x",irq_ptr->schid.sch_no);
      QDIO_DBF_TEXT1(0,trace,dbf_text);
      QDIO_DBF_TEXT0(0,setup,dbf_text);

      rc = qdio_shutdown(cdev, how);
      if ((rc == 0) || (rc == -EINPROGRESS))
            rc = qdio_free(cdev);
      return rc;
}

int
qdio_shutdown(struct ccw_device *cdev, int how)
{
      struct qdio_irq *irq_ptr;
      int i;
      int result = 0;
      int rc;
      unsigned long flags;
      int timeout;
      char dbf_text[15];

      irq_ptr = cdev->private->qdio_data;
      if (!irq_ptr)
            return -ENODEV;

      down(&irq_ptr->setting_up_sema);

      sprintf(dbf_text,"qsqs%4x",irq_ptr->schid.sch_no);
      QDIO_DBF_TEXT1(0,trace,dbf_text);
      QDIO_DBF_TEXT0(0,setup,dbf_text);

      /* mark all qs as uninteresting */
      for (i=0;i<irq_ptr->no_input_qs;i++)
            atomic_set(&irq_ptr->input_qs[i]->is_in_shutdown,1);

      for (i=0;i<irq_ptr->no_output_qs;i++)
            atomic_set(&irq_ptr->output_qs[i]->is_in_shutdown,1);

      tasklet_kill(&tiqdio_tasklet);

      for (i=0;i<irq_ptr->no_input_qs;i++) {
            qdio_unmark_q(irq_ptr->input_qs[i]);
            tasklet_kill(&irq_ptr->input_qs[i]->tasklet);
            wait_event_interruptible_timeout(cdev->private->wait_q,
                                     !atomic_read(&irq_ptr->
                                                input_qs[i]->
                                                use_count),
                                     QDIO_NO_USE_COUNT_TIMEOUT);
            if (atomic_read(&irq_ptr->input_qs[i]->use_count))
                  result=-EINPROGRESS;
      }

      for (i=0;i<irq_ptr->no_output_qs;i++) {
            tasklet_kill(&irq_ptr->output_qs[i]->tasklet);
            del_timer(&irq_ptr->output_qs[i]->timer);
            wait_event_interruptible_timeout(cdev->private->wait_q,
                                     !atomic_read(&irq_ptr->
                                                output_qs[i]->
                                                use_count),
                                     QDIO_NO_USE_COUNT_TIMEOUT);
            if (atomic_read(&irq_ptr->output_qs[i]->use_count))
                  result=-EINPROGRESS;
      }

      /* cleanup subchannel */
      spin_lock_irqsave(get_ccwdev_lock(cdev),flags);
      if (how&QDIO_FLAG_CLEANUP_USING_CLEAR) {
            rc = ccw_device_clear(cdev, QDIO_DOING_CLEANUP);
            timeout=QDIO_CLEANUP_CLEAR_TIMEOUT;
      } else if (how&QDIO_FLAG_CLEANUP_USING_HALT) {
            rc = ccw_device_halt(cdev, QDIO_DOING_CLEANUP);
            timeout=QDIO_CLEANUP_HALT_TIMEOUT;
      } else { /* default behaviour */
            rc = ccw_device_halt(cdev, QDIO_DOING_CLEANUP);
            timeout=QDIO_CLEANUP_HALT_TIMEOUT;
      }
      if (rc == -ENODEV) {
            /* No need to wait for device no longer present. */
            qdio_set_state(irq_ptr, QDIO_IRQ_STATE_INACTIVE);
            spin_unlock_irqrestore(get_ccwdev_lock(cdev), flags);
      } else if (((void *)cdev->handler != (void *)qdio_handler) && rc == 0) {
            /*
             * Whoever put another handler there, has to cope with the
             * interrupt theirself. Might happen if qdio_shutdown was
             * called on already shutdown queues, but this shouldn't have
             * bad side effects.
             */
            qdio_set_state(irq_ptr, QDIO_IRQ_STATE_INACTIVE);
            spin_unlock_irqrestore(get_ccwdev_lock(cdev), flags);
      } else if (rc == 0) {
            qdio_set_state(irq_ptr, QDIO_IRQ_STATE_CLEANUP);
            ccw_device_set_timeout(cdev, timeout);
            spin_unlock_irqrestore(get_ccwdev_lock(cdev),flags);

            wait_event(cdev->private->wait_q,
                     irq_ptr->state == QDIO_IRQ_STATE_INACTIVE ||
                     irq_ptr->state == QDIO_IRQ_STATE_ERR);
      } else {
            QDIO_PRINT_INFO("ccw_device_{halt,clear} returned %d for "
                        "device %s\n", result, cdev->dev.bus_id);
            spin_unlock_irqrestore(get_ccwdev_lock(cdev), flags);
            result = rc;
            goto out;
      }
      if (irq_ptr->is_thinint_irq) {
            qdio_put_indicator((__u32*)irq_ptr->dev_st_chg_ind);
            tiqdio_set_subchannel_ind(irq_ptr,1); 
                /* reset adapter interrupt indicators */
      }

      /* exchange int handlers, if necessary */
      if ((void*)cdev->handler == (void*)qdio_handler)
            cdev->handler=irq_ptr->original_int_handler;

      /* Ignore errors. */
      qdio_set_state(irq_ptr, QDIO_IRQ_STATE_INACTIVE);
      ccw_device_set_timeout(cdev, 0);
out:
      up(&irq_ptr->setting_up_sema);
      return result;
}

int
qdio_free(struct ccw_device *cdev)
{
      struct qdio_irq *irq_ptr;
      char dbf_text[15];

      irq_ptr = cdev->private->qdio_data;
      if (!irq_ptr)
            return -ENODEV;

      down(&irq_ptr->setting_up_sema);

      sprintf(dbf_text,"qfqs%4x",irq_ptr->schid.sch_no);
      QDIO_DBF_TEXT1(0,trace,dbf_text);
      QDIO_DBF_TEXT0(0,setup,dbf_text);

      cdev->private->qdio_data = NULL;

      up(&irq_ptr->setting_up_sema);

      qdio_release_irq_memory(irq_ptr);
      module_put(THIS_MODULE);
      return 0;
}

static void
qdio_allocate_do_dbf(struct qdio_initialize *init_data)
{
      char dbf_text[20]; /* if a printf printed out more than 8 chars */

      sprintf(dbf_text,"qfmt:%x",init_data->q_format);
      QDIO_DBF_TEXT0(0,setup,dbf_text);
      QDIO_DBF_HEX0(0,setup,init_data->adapter_name,8);
      sprintf(dbf_text,"qpff%4x",init_data->qib_param_field_format);
      QDIO_DBF_TEXT0(0,setup,dbf_text);
      QDIO_DBF_HEX0(0,setup,&init_data->qib_param_field,sizeof(char*));
      QDIO_DBF_HEX0(0,setup,&init_data->input_slib_elements,sizeof(long*));
      QDIO_DBF_HEX0(0,setup,&init_data->output_slib_elements,sizeof(long*));
      sprintf(dbf_text,"miit%4x",init_data->min_input_threshold);
      QDIO_DBF_TEXT0(0,setup,dbf_text);
      sprintf(dbf_text,"mait%4x",init_data->max_input_threshold);
      QDIO_DBF_TEXT0(0,setup,dbf_text);
      sprintf(dbf_text,"miot%4x",init_data->min_output_threshold);
      QDIO_DBF_TEXT0(0,setup,dbf_text);
      sprintf(dbf_text,"maot%4x",init_data->max_output_threshold);
      QDIO_DBF_TEXT0(0,setup,dbf_text);
      sprintf(dbf_text,"niq:%4x",init_data->no_input_qs);
      QDIO_DBF_TEXT0(0,setup,dbf_text);
      sprintf(dbf_text,"noq:%4x",init_data->no_output_qs);
      QDIO_DBF_TEXT0(0,setup,dbf_text);
      QDIO_DBF_HEX0(0,setup,&init_data->input_handler,sizeof(void*));
      QDIO_DBF_HEX0(0,setup,&init_data->output_handler,sizeof(void*));
      QDIO_DBF_HEX0(0,setup,&init_data->int_parm,sizeof(long));
      QDIO_DBF_HEX0(0,setup,&init_data->flags,sizeof(long));
      QDIO_DBF_HEX0(0,setup,&init_data->input_sbal_addr_array,sizeof(void*));
      QDIO_DBF_HEX0(0,setup,&init_data->output_sbal_addr_array,sizeof(void*));
}

static void
qdio_allocate_fill_input_desc(struct qdio_irq *irq_ptr, int i, int iqfmt)
{
      irq_ptr->input_qs[i]->is_iqdio_q = iqfmt;
      irq_ptr->input_qs[i]->is_thinint_q = irq_ptr->is_thinint_irq;

      irq_ptr->qdr->qdf0[i].sliba=(unsigned long)(irq_ptr->input_qs[i]->slib);

      irq_ptr->qdr->qdf0[i].sla=(unsigned long)(irq_ptr->input_qs[i]->sl);

      irq_ptr->qdr->qdf0[i].slsba=
            (unsigned long)(&irq_ptr->input_qs[i]->slsb.acc.val[0]);

      irq_ptr->qdr->qdf0[i].akey=QDIO_STORAGE_KEY;
      irq_ptr->qdr->qdf0[i].bkey=QDIO_STORAGE_KEY;
      irq_ptr->qdr->qdf0[i].ckey=QDIO_STORAGE_KEY;
      irq_ptr->qdr->qdf0[i].dkey=QDIO_STORAGE_KEY;
}

static void
qdio_allocate_fill_output_desc(struct qdio_irq *irq_ptr, int i,
                         int j, int iqfmt)
{
      irq_ptr->output_qs[i]->is_iqdio_q = iqfmt;
      irq_ptr->output_qs[i]->is_thinint_q = irq_ptr->is_thinint_irq;

      irq_ptr->qdr->qdf0[i+j].sliba=(unsigned long)(irq_ptr->output_qs[i]->slib);

      irq_ptr->qdr->qdf0[i+j].sla=(unsigned long)(irq_ptr->output_qs[i]->sl);

      irq_ptr->qdr->qdf0[i+j].slsba=
            (unsigned long)(&irq_ptr->output_qs[i]->slsb.acc.val[0]);

      irq_ptr->qdr->qdf0[i+j].akey=QDIO_STORAGE_KEY;
      irq_ptr->qdr->qdf0[i+j].bkey=QDIO_STORAGE_KEY;
      irq_ptr->qdr->qdf0[i+j].ckey=QDIO_STORAGE_KEY;
      irq_ptr->qdr->qdf0[i+j].dkey=QDIO_STORAGE_KEY;
}


static void
qdio_initialize_set_siga_flags_input(struct qdio_irq *irq_ptr)
{
      int i;

      for (i=0;i<irq_ptr->no_input_qs;i++) {
            irq_ptr->input_qs[i]->siga_sync=
                  irq_ptr->qdioac&CHSC_FLAG_SIGA_SYNC_NECESSARY;
            irq_ptr->input_qs[i]->siga_in=
                  irq_ptr->qdioac&CHSC_FLAG_SIGA_INPUT_NECESSARY;
            irq_ptr->input_qs[i]->siga_out=
                  irq_ptr->qdioac&CHSC_FLAG_SIGA_OUTPUT_NECESSARY;
            irq_ptr->input_qs[i]->siga_sync_done_on_thinints=
                  irq_ptr->qdioac&CHSC_FLAG_SIGA_SYNC_DONE_ON_THININTS;
            irq_ptr->input_qs[i]->hydra_gives_outbound_pcis=
                  irq_ptr->hydra_gives_outbound_pcis;
            irq_ptr->input_qs[i]->siga_sync_done_on_outb_tis=
                  ((irq_ptr->qdioac&
                    (CHSC_FLAG_SIGA_SYNC_DONE_ON_OUTB_PCIS|
                     CHSC_FLAG_SIGA_SYNC_DONE_ON_THININTS))==
                   (CHSC_FLAG_SIGA_SYNC_DONE_ON_OUTB_PCIS|
                    CHSC_FLAG_SIGA_SYNC_DONE_ON_THININTS));

      }
}

static void
qdio_initialize_set_siga_flags_output(struct qdio_irq *irq_ptr)
{
      int i;

      for (i=0;i<irq_ptr->no_output_qs;i++) {
            irq_ptr->output_qs[i]->siga_sync=
                  irq_ptr->qdioac&CHSC_FLAG_SIGA_SYNC_NECESSARY;
            irq_ptr->output_qs[i]->siga_in=
                  irq_ptr->qdioac&CHSC_FLAG_SIGA_INPUT_NECESSARY;
            irq_ptr->output_qs[i]->siga_out=
                  irq_ptr->qdioac&CHSC_FLAG_SIGA_OUTPUT_NECESSARY;
            irq_ptr->output_qs[i]->siga_sync_done_on_thinints=
                  irq_ptr->qdioac&CHSC_FLAG_SIGA_SYNC_DONE_ON_THININTS;
            irq_ptr->output_qs[i]->hydra_gives_outbound_pcis=
                  irq_ptr->hydra_gives_outbound_pcis;
            irq_ptr->output_qs[i]->siga_sync_done_on_outb_tis=
                  ((irq_ptr->qdioac&
                    (CHSC_FLAG_SIGA_SYNC_DONE_ON_OUTB_PCIS|
                     CHSC_FLAG_SIGA_SYNC_DONE_ON_THININTS))==
                   (CHSC_FLAG_SIGA_SYNC_DONE_ON_OUTB_PCIS|
                    CHSC_FLAG_SIGA_SYNC_DONE_ON_THININTS));

      }
}

static int
qdio_establish_irq_check_for_errors(struct ccw_device *cdev, int cstat,
                            int dstat)
{
      char dbf_text[15];
      struct qdio_irq *irq_ptr;

      irq_ptr = cdev->private->qdio_data;

      if (cstat || (dstat & ~(DEV_STAT_CHN_END|DEV_STAT_DEV_END))) {
            sprintf(dbf_text,"ick1%4x",irq_ptr->schid.sch_no);
            QDIO_DBF_TEXT2(1,trace,dbf_text);
            QDIO_DBF_HEX2(0,trace,&dstat,sizeof(int));
            QDIO_DBF_HEX2(0,trace,&cstat,sizeof(int));
            QDIO_PRINT_ERR("received check condition on establish " \
                         "queues on irq 0.%x.%x (cs=x%x, ds=x%x).\n",
                         irq_ptr->schid.ssid, irq_ptr->schid.sch_no,
                         cstat,dstat);
            qdio_set_state(irq_ptr,QDIO_IRQ_STATE_ERR);
      }
      
      if (!(dstat & DEV_STAT_DEV_END)) {
            QDIO_DBF_TEXT2(1,setup,"eq:no de");
            QDIO_DBF_HEX2(0,setup,&dstat, sizeof(dstat));
            QDIO_DBF_HEX2(0,setup,&cstat, sizeof(cstat));
            QDIO_PRINT_ERR("establish queues on irq 0.%x.%04x: didn't get "
                         "device end: dstat=%02x, cstat=%02x\n",
                         irq_ptr->schid.ssid, irq_ptr->schid.sch_no,
                         dstat, cstat);
            qdio_set_state(irq_ptr, QDIO_IRQ_STATE_ERR);
            return 1;
      }

      if (dstat & ~(DEV_STAT_CHN_END|DEV_STAT_DEV_END)) {
            QDIO_DBF_TEXT2(1,setup,"eq:badio");
            QDIO_DBF_HEX2(0,setup,&dstat, sizeof(dstat));
            QDIO_DBF_HEX2(0,setup,&cstat, sizeof(cstat));
            QDIO_PRINT_ERR("establish queues on irq 0.%x.%04x: got "
                         "the following devstat: dstat=%02x, "
                         "cstat=%02x\n", irq_ptr->schid.ssid,
                         irq_ptr->schid.sch_no, dstat, cstat);
            qdio_set_state(irq_ptr, QDIO_IRQ_STATE_ERR);
            return 1;
      }
      return 0;
}

static void
qdio_establish_handle_irq(struct ccw_device *cdev, int cstat, int dstat)
{
      struct qdio_irq *irq_ptr;
      char dbf_text[15];

      irq_ptr = cdev->private->qdio_data;

      sprintf(dbf_text,"qehi%4x",cdev->private->schid.sch_no);
      QDIO_DBF_TEXT0(0,setup,dbf_text);
      QDIO_DBF_TEXT0(0,trace,dbf_text);

      if (qdio_establish_irq_check_for_errors(cdev, cstat, dstat)) {
            ccw_device_set_timeout(cdev, 0);
            return;
      }

      qdio_set_state(irq_ptr,QDIO_IRQ_STATE_ESTABLISHED);
      ccw_device_set_timeout(cdev, 0);
}

int
qdio_initialize(struct qdio_initialize *init_data)
{
      int rc;
      char dbf_text[15];

      sprintf(dbf_text,"qini%4x",init_data->cdev->private->schid.sch_no);
      QDIO_DBF_TEXT0(0,setup,dbf_text);
      QDIO_DBF_TEXT0(0,trace,dbf_text);

      rc = qdio_allocate(init_data);
      if (rc == 0) {
            rc = qdio_establish(init_data);
            if (rc != 0)
                  qdio_free(init_data->cdev);
      }

      return rc;
}


int
qdio_allocate(struct qdio_initialize *init_data)
{
      struct qdio_irq *irq_ptr;
      char dbf_text[15];

      sprintf(dbf_text,"qalc%4x",init_data->cdev->private->schid.sch_no);
      QDIO_DBF_TEXT0(0,setup,dbf_text);
      QDIO_DBF_TEXT0(0,trace,dbf_text);
      if ( (init_data->no_input_qs>QDIO_MAX_QUEUES_PER_IRQ) ||
           (init_data->no_output_qs>QDIO_MAX_QUEUES_PER_IRQ) ||
           ((init_data->no_input_qs) && (!init_data->input_handler)) ||
           ((init_data->no_output_qs) && (!init_data->output_handler)) )
            return -EINVAL;

      if (!init_data->input_sbal_addr_array)
            return -EINVAL;

      if (!init_data->output_sbal_addr_array)
            return -EINVAL;

      qdio_allocate_do_dbf(init_data);

      /* create irq */
      irq_ptr = (void *) get_zeroed_page(GFP_KERNEL | GFP_DMA);

      QDIO_DBF_TEXT0(0,setup,"irq_ptr:");
      QDIO_DBF_HEX0(0,setup,&irq_ptr,sizeof(void*));

      if (!irq_ptr) {
            QDIO_PRINT_ERR("allocation of irq_ptr failed!\n");
            return -ENOMEM;
      }

      init_MUTEX(&irq_ptr->setting_up_sema);

      /* QDR must be in DMA area since CCW data address is only 32 bit */
      irq_ptr->qdr = (struct qdr *) __get_free_page(GFP_KERNEL | GFP_DMA);
      if (!(irq_ptr->qdr)) {
            free_page((unsigned long) irq_ptr);
            QDIO_PRINT_ERR("allocation of irq_ptr->qdr failed!\n");
            return -ENOMEM;
            }
      QDIO_DBF_TEXT0(0,setup,"qdr:");
      QDIO_DBF_HEX0(0,setup,&irq_ptr->qdr,sizeof(void*));

      if (qdio_alloc_qs(irq_ptr,
                          init_data->no_input_qs,
                    init_data->no_output_qs)) {
            QDIO_PRINT_ERR("queue allocation failed!\n");
            qdio_release_irq_memory(irq_ptr);
            return -ENOMEM;
      }

      init_data->cdev->private->qdio_data = irq_ptr;

      qdio_set_state(irq_ptr,QDIO_IRQ_STATE_INACTIVE);

      return 0;
}

static int qdio_fill_irq(struct qdio_initialize *init_data)
{
      int i;
      char dbf_text[15];
      struct ciw *ciw;
      int is_iqdio;
      struct qdio_irq *irq_ptr;

      irq_ptr = init_data->cdev->private->qdio_data;

      memset(irq_ptr,0,((char*)&irq_ptr->qdr)-((char*)irq_ptr));

        /* wipes qib.ac, required by ar7063 */
      memset(irq_ptr->qdr,0,sizeof(struct qdr));

      irq_ptr->int_parm=init_data->int_parm;

      irq_ptr->schid = ccw_device_get_subchannel_id(init_data->cdev);
      irq_ptr->no_input_qs=init_data->no_input_qs;
      irq_ptr->no_output_qs=init_data->no_output_qs;

      if (init_data->q_format==QDIO_IQDIO_QFMT) {
            irq_ptr->is_iqdio_irq=1;
            irq_ptr->is_thinint_irq=1;
      } else {
            irq_ptr->is_iqdio_irq=0;
            irq_ptr->is_thinint_irq=hydra_thinints;
      }
      sprintf(dbf_text,"is_i_t%1x%1x",
            irq_ptr->is_iqdio_irq,irq_ptr->is_thinint_irq);
      QDIO_DBF_TEXT2(0,setup,dbf_text);

      if (irq_ptr->is_thinint_irq) {
            irq_ptr->dev_st_chg_ind = qdio_get_indicator();
            QDIO_DBF_HEX1(0,setup,&irq_ptr->dev_st_chg_ind,sizeof(void*));
            if (!irq_ptr->dev_st_chg_ind) {
                  QDIO_PRINT_WARN("no indicator location available " \
                              "for irq 0.%x.%x\n",
                              irq_ptr->schid.ssid, irq_ptr->schid.sch_no);
                  qdio_release_irq_memory(irq_ptr);
                  return -ENOBUFS;
            }
      }

      /* defaults */
      irq_ptr->equeue.cmd=DEFAULT_ESTABLISH_QS_CMD;
      irq_ptr->equeue.count=DEFAULT_ESTABLISH_QS_COUNT;
      irq_ptr->aqueue.cmd=DEFAULT_ACTIVATE_QS_CMD;
      irq_ptr->aqueue.count=DEFAULT_ACTIVATE_QS_COUNT;

      qdio_fill_qs(irq_ptr, init_data->cdev,
                 init_data->no_input_qs,
                 init_data->no_output_qs,
                 init_data->input_handler,
                 init_data->output_handler,init_data->int_parm,
                 init_data->q_format,init_data->flags,
                 init_data->input_sbal_addr_array,
                 init_data->output_sbal_addr_array);

      if (!try_module_get(THIS_MODULE)) {
            QDIO_PRINT_CRIT("try_module_get() failed!\n");
            qdio_release_irq_memory(irq_ptr);
            return -EINVAL;
      }

      qdio_fill_thresholds(irq_ptr,init_data->no_input_qs,
                       init_data->no_output_qs,
                       init_data->min_input_threshold,
                       init_data->max_input_threshold,
                       init_data->min_output_threshold,
                       init_data->max_output_threshold);

      /* fill in qdr */
      irq_ptr->qdr->qfmt=init_data->q_format;
      irq_ptr->qdr->iqdcnt=init_data->no_input_qs;
      irq_ptr->qdr->oqdcnt=init_data->no_output_qs;
      irq_ptr->qdr->iqdsz=sizeof(struct qdesfmt0)/4; /* size in words */
      irq_ptr->qdr->oqdsz=sizeof(struct qdesfmt0)/4;

      irq_ptr->qdr->qiba=(unsigned long)&irq_ptr->qib;
      irq_ptr->qdr->qkey=QDIO_STORAGE_KEY;

      /* fill in qib */
      irq_ptr->is_qebsm = is_passthrough;
      if (irq_ptr->is_qebsm)
            irq_ptr->qib.rflags |= QIB_RFLAGS_ENABLE_QEBSM;

      irq_ptr->qib.qfmt=init_data->q_format;
      if (init_data->no_input_qs)
            irq_ptr->qib.isliba=(unsigned long)(irq_ptr->input_qs[0]->slib);
      if (init_data->no_output_qs)
            irq_ptr->qib.osliba=(unsigned long)(irq_ptr->output_qs[0]->slib);
      memcpy(irq_ptr->qib.ebcnam,init_data->adapter_name,8);

      qdio_set_impl_params(irq_ptr,init_data->qib_param_field_format,
                       init_data->qib_param_field,
                       init_data->no_input_qs,
                       init_data->no_output_qs,
                       init_data->input_slib_elements,
                       init_data->output_slib_elements);

      /* first input descriptors, then output descriptors */
      is_iqdio = (init_data->q_format == QDIO_IQDIO_QFMT) ? 1 : 0;
      for (i=0;i<init_data->no_input_qs;i++)
            qdio_allocate_fill_input_desc(irq_ptr, i, is_iqdio);

      for (i=0;i<init_data->no_output_qs;i++)
            qdio_allocate_fill_output_desc(irq_ptr, i,
                                     init_data->no_input_qs,
                                     is_iqdio);

      /* qdr, qib, sls, slsbs, slibs, sbales filled. */

      /* get qdio commands */
      ciw = ccw_device_get_ciw(init_data->cdev, CIW_TYPE_EQUEUE);
      if (!ciw) {
            QDIO_DBF_TEXT2(1,setup,"no eq");
            QDIO_PRINT_INFO("No equeue CIW found for QDIO commands. "
                        "Trying to use default.\n");
      } else
            irq_ptr->equeue = *ciw;
      ciw = ccw_device_get_ciw(init_data->cdev, CIW_TYPE_AQUEUE);
      if (!ciw) {
            QDIO_DBF_TEXT2(1,setup,"no aq");
            QDIO_PRINT_INFO("No aqueue CIW found for QDIO commands. "
                        "Trying to use default.\n");
      } else
            irq_ptr->aqueue = *ciw;

      /* Set new interrupt handler. */
      irq_ptr->original_int_handler = init_data->cdev->handler;
      init_data->cdev->handler = qdio_handler;

      return 0;
}

int
qdio_establish(struct qdio_initialize *init_data)
{
      struct qdio_irq *irq_ptr;
      unsigned long saveflags;
      int result, result2;
      struct ccw_device *cdev;
      char dbf_text[20];

      cdev=init_data->cdev;
      irq_ptr = cdev->private->qdio_data;
      if (!irq_ptr)
            return -EINVAL;

      if (cdev->private->state != DEV_STATE_ONLINE)
            return -EINVAL;
      
      down(&irq_ptr->setting_up_sema);

      qdio_fill_irq(init_data);

      /* the thinint CHSC stuff */
      if (irq_ptr->is_thinint_irq) {

            result = tiqdio_set_subchannel_ind(irq_ptr,0);
            if (result) {
                  up(&irq_ptr->setting_up_sema);
                  qdio_shutdown(cdev, QDIO_FLAG_CLEANUP_USING_CLEAR);
                  return result;
            }
            tiqdio_set_delay_target(irq_ptr,TIQDIO_DELAY_TARGET);
      }

      sprintf(dbf_text,"qest%4x",cdev->private->schid.sch_no);
      QDIO_DBF_TEXT0(0,setup,dbf_text);
      QDIO_DBF_TEXT0(0,trace,dbf_text);

      /* establish q */
      irq_ptr->ccw.cmd_code=irq_ptr->equeue.cmd;
      irq_ptr->ccw.flags=CCW_FLAG_SLI;
      irq_ptr->ccw.count=irq_ptr->equeue.count;
      irq_ptr->ccw.cda=QDIO_GET_ADDR(irq_ptr->qdr);

      spin_lock_irqsave(get_ccwdev_lock(cdev),saveflags);

      ccw_device_set_options_mask(cdev, 0);
      result=ccw_device_start_timeout(cdev,&irq_ptr->ccw,
                              QDIO_DOING_ESTABLISH,0, 0,
                              QDIO_ESTABLISH_TIMEOUT);
      if (result) {
            result2=ccw_device_start_timeout(cdev,&irq_ptr->ccw,
                                     QDIO_DOING_ESTABLISH,0,0,
                                     QDIO_ESTABLISH_TIMEOUT);
            sprintf(dbf_text,"eq:io%4x",result);
            QDIO_DBF_TEXT2(1,setup,dbf_text);
            if (result2) {
                  sprintf(dbf_text,"eq:io%4x",result);
                  QDIO_DBF_TEXT2(1,setup,dbf_text);
            }
            QDIO_PRINT_WARN("establish queues on irq 0.%x.%04x: do_IO " \
                        "returned %i, next try returned %i\n",
                        irq_ptr->schid.ssid, irq_ptr->schid.sch_no,
                        result, result2);
            result=result2;
            if (result)
                  ccw_device_set_timeout(cdev, 0);
      }

      spin_unlock_irqrestore(get_ccwdev_lock(cdev),saveflags);

      if (result) {
            up(&irq_ptr->setting_up_sema);
            qdio_shutdown(cdev,QDIO_FLAG_CLEANUP_USING_CLEAR);
            return result;
      }
      
      /* Timeout is cared for already by using ccw_device_start_timeout(). */
      wait_event_interruptible(cdev->private->wait_q,
             irq_ptr->state == QDIO_IRQ_STATE_ESTABLISHED ||
             irq_ptr->state == QDIO_IRQ_STATE_ERR);

      if (irq_ptr->state == QDIO_IRQ_STATE_ESTABLISHED)
            result = 0;
      else {
            up(&irq_ptr->setting_up_sema);
            qdio_shutdown(cdev, QDIO_FLAG_CLEANUP_USING_CLEAR);
            return -EIO;
      }

      qdio_get_ssqd_information(irq_ptr);
      /* if this gets set once, we're running under VM and can omit SVSes */
      if (irq_ptr->qdioac&CHSC_FLAG_SIGA_SYNC_NECESSARY)
            omit_svs=1;

      sprintf(dbf_text,"qdioac%2x",irq_ptr->qdioac);
      QDIO_DBF_TEXT2(0,setup,dbf_text);

      sprintf(dbf_text,"qib ac%2x",irq_ptr->qib.ac);
      QDIO_DBF_TEXT2(0,setup,dbf_text);

      irq_ptr->hydra_gives_outbound_pcis=
            irq_ptr->qib.ac&QIB_AC_OUTBOUND_PCI_SUPPORTED;
      irq_ptr->sync_done_on_outb_pcis=
            irq_ptr->qdioac&CHSC_FLAG_SIGA_SYNC_DONE_ON_OUTB_PCIS;

      qdio_initialize_set_siga_flags_input(irq_ptr);
      qdio_initialize_set_siga_flags_output(irq_ptr);

      up(&irq_ptr->setting_up_sema);

      return result;
      
}

int
qdio_activate(struct ccw_device *cdev, int flags)
{
      struct qdio_irq *irq_ptr;
      int i,result=0,result2;
      unsigned long saveflags;
      char dbf_text[20]; /* see qdio_initialize */

      irq_ptr = cdev->private->qdio_data;
      if (!irq_ptr)
            return -ENODEV;

      if (cdev->private->state != DEV_STATE_ONLINE)
            return -EINVAL;

      down(&irq_ptr->setting_up_sema);
      if (irq_ptr->state==QDIO_IRQ_STATE_INACTIVE) {
            result=-EBUSY;
            goto out;
      }

      sprintf(dbf_text,"qact%4x", irq_ptr->schid.sch_no);
      QDIO_DBF_TEXT2(0,setup,dbf_text);
      QDIO_DBF_TEXT2(0,trace,dbf_text);

      /* activate q */
      irq_ptr->ccw.cmd_code=irq_ptr->aqueue.cmd;
      irq_ptr->ccw.flags=CCW_FLAG_SLI;
      irq_ptr->ccw.count=irq_ptr->aqueue.count;
      irq_ptr->ccw.cda=QDIO_GET_ADDR(0);

      spin_lock_irqsave(get_ccwdev_lock(cdev),saveflags);

      ccw_device_set_timeout(cdev, 0);
      ccw_device_set_options(cdev, CCWDEV_REPORT_ALL);
      result=ccw_device_start(cdev,&irq_ptr->ccw,QDIO_DOING_ACTIVATE,
                        0, DOIO_DENY_PREFETCH);
      if (result) {
            result2=ccw_device_start(cdev,&irq_ptr->ccw,
                               QDIO_DOING_ACTIVATE,0,0);
            sprintf(dbf_text,"aq:io%4x",result);
            QDIO_DBF_TEXT2(1,setup,dbf_text);
            if (result2) {
                  sprintf(dbf_text,"aq:io%4x",result);
                  QDIO_DBF_TEXT2(1,setup,dbf_text);
            }
            QDIO_PRINT_WARN("activate queues on irq 0.%x.%04x: do_IO " \
                        "returned %i, next try returned %i\n",
                        irq_ptr->schid.ssid, irq_ptr->schid.sch_no,
                        result, result2);
            result=result2;
      }

      spin_unlock_irqrestore(get_ccwdev_lock(cdev),saveflags);
      if (result)
            goto out;

      for (i=0;i<irq_ptr->no_input_qs;i++) {
            if (irq_ptr->is_thinint_irq) {
                  /* 
                   * that way we know, that, if we will get interrupted
                   * by tiqdio_inbound_processing, qdio_unmark_q will
                   * not be called 
                   */
                  qdio_reserve_q(irq_ptr->input_qs[i]);
                  qdio_mark_tiq(irq_ptr->input_qs[i]);
                  qdio_release_q(irq_ptr->input_qs[i]);
            }
      }

      if (flags&QDIO_FLAG_NO_INPUT_INTERRUPT_CONTEXT) {
            for (i=0;i<irq_ptr->no_input_qs;i++) {
                  irq_ptr->input_qs[i]->is_input_q|=
                        QDIO_FLAG_NO_INPUT_INTERRUPT_CONTEXT;
            }
      }

      wait_event_interruptible_timeout(cdev->private->wait_q,
                               ((irq_ptr->state ==
                                QDIO_IRQ_STATE_STOPPED) ||
                                (irq_ptr->state ==
                                 QDIO_IRQ_STATE_ERR)),
                               QDIO_ACTIVATE_TIMEOUT);

      switch (irq_ptr->state) {
      case QDIO_IRQ_STATE_STOPPED:
      case QDIO_IRQ_STATE_ERR:
            up(&irq_ptr->setting_up_sema);
            qdio_shutdown(cdev, QDIO_FLAG_CLEANUP_USING_CLEAR);
            down(&irq_ptr->setting_up_sema);
            result = -EIO;
            break;
      default:
            qdio_set_state(irq_ptr, QDIO_IRQ_STATE_ACTIVE);
            result = 0;
      }
 out:
      up(&irq_ptr->setting_up_sema);

      return result;
}

/* buffers filled forwards again to make Rick happy */
static void
qdio_do_qdio_fill_input(struct qdio_q *q, unsigned int qidx,
                  unsigned int count, struct qdio_buffer *buffers)
{
      struct qdio_irq *irq = (struct qdio_irq *) q->irq_ptr;
      int tmp = 0;

      qidx &= (QDIO_MAX_BUFFERS_PER_Q - 1);
      if (irq->is_qebsm) {
            while (count) {
                  tmp = set_slsb(q, &qidx, SLSB_CU_INPUT_EMPTY, &count);
                  if (!tmp)
                        return;
            }
            return;
      }
      for (;;) {
            set_slsb(q, &qidx, SLSB_CU_INPUT_EMPTY, &count);
            count--;
            if (!count) break;
            qidx = (qidx + 1) & (QDIO_MAX_BUFFERS_PER_Q - 1);
      }
}

static void
qdio_do_qdio_fill_output(struct qdio_q *q, unsigned int qidx,
                   unsigned int count, struct qdio_buffer *buffers)
{
      struct qdio_irq *irq = (struct qdio_irq *) q->irq_ptr;
      int tmp = 0;

      qidx &= (QDIO_MAX_BUFFERS_PER_Q - 1);
      if (irq->is_qebsm) {
            while (count) {
                  tmp = set_slsb(q, &qidx, SLSB_CU_OUTPUT_PRIMED, &count);
                  if (!tmp)
                        return;
            }
            return;
      }

      for (;;) {
            set_slsb(q, &qidx, SLSB_CU_OUTPUT_PRIMED, &count);
            count--;
            if (!count) break;
            qidx = (qidx + 1) & (QDIO_MAX_BUFFERS_PER_Q - 1);
      }
}

static void
do_qdio_handle_inbound(struct qdio_q *q, unsigned int callflags,
                   unsigned int qidx, unsigned int count,
                   struct qdio_buffer *buffers)
{
      int used_elements;

        /* This is the inbound handling of queues */
      used_elements=atomic_add_return(count, &q->number_of_buffers_used) - count;
      
      qdio_do_qdio_fill_input(q,qidx,count,buffers);
      
      if ((used_elements+count==QDIO_MAX_BUFFERS_PER_Q)&&
          (callflags&QDIO_FLAG_UNDER_INTERRUPT))
            atomic_xchg(&q->polling,0);
      
      if (used_elements) 
            return;
      if (callflags&QDIO_FLAG_DONT_SIGA)
            return;
      if (q->siga_in) {
            int result;
            
            result=qdio_siga_input(q);
            if (result) {
                  if (q->siga_error)
                        q->error_status_flags|=
                              QDIO_STATUS_MORE_THAN_ONE_SIGA_ERROR;
                  q->error_status_flags|=QDIO_STATUS_LOOK_FOR_ERROR;
                  q->siga_error=result;
            }
      }
            
      qdio_mark_q(q);
}

static void
do_qdio_handle_outbound(struct qdio_q *q, unsigned int callflags,
                  unsigned int qidx, unsigned int count,
                  struct qdio_buffer *buffers)
{
      int used_elements;
      unsigned int cnt, start_buf;
      unsigned char state = 0;
      struct qdio_irq *irq = (struct qdio_irq *) q->irq_ptr;

      /* This is the outbound handling of queues */
      qdio_do_qdio_fill_output(q,qidx,count,buffers);

      used_elements=atomic_add_return(count, &q->number_of_buffers_used) - count;

      if (callflags&QDIO_FLAG_DONT_SIGA) {
            qdio_perf_stat_inc(&perf_stats.outbound_cnt);
            return;
      }
      if (callflags & QDIO_FLAG_PCI_OUT)
            q->is_pci_out = 1;
      else
            q->is_pci_out = 0;
      if (q->is_iqdio_q) {
            /* one siga for every sbal */
            while (count--)
                  qdio_kick_outbound_q(q);
                  
            __qdio_outbound_processing(q);
      } else {
            /* under VM, we do a SIGA sync unconditionally */
            SYNC_MEMORY;
            else {
                  /* 
                   * w/o shadow queues (else branch of
                   * SYNC_MEMORY :-/ ), we try to
                   * fast-requeue buffers 
                   */
                  if (irq->is_qebsm) {
                        cnt = 1;
                        start_buf = ((qidx+QDIO_MAX_BUFFERS_PER_Q-1) &
                                   (QDIO_MAX_BUFFERS_PER_Q-1));
                        qdio_do_eqbs(q, &state, &start_buf, &cnt);
                  } else
                        state = q->slsb.acc.val[(qidx+QDIO_MAX_BUFFERS_PER_Q-1)
                              &(QDIO_MAX_BUFFERS_PER_Q-1) ];
                   if (state != SLSB_CU_OUTPUT_PRIMED) {
                        qdio_kick_outbound_q(q);
                  } else {
                        QDIO_DBF_TEXT3(0,trace, "fast-req");
                        qdio_perf_stat_inc(&perf_stats.fast_reqs);
                  }
            }
            /* 
             * only marking the q could take too long,
             * the upper layer module could do a lot of
             * traffic in that time 
             */
            __qdio_outbound_processing(q);
      }

      qdio_perf_stat_inc(&perf_stats.outbound_cnt);
}

/* count must be 1 in iqdio */
int
do_QDIO(struct ccw_device *cdev,unsigned int callflags,
      unsigned int queue_number, unsigned int qidx,
      unsigned int count,struct qdio_buffer *buffers)
{
      struct qdio_irq *irq_ptr;
#ifdef CONFIG_QDIO_DEBUG
      char dbf_text[20];

      sprintf(dbf_text,"doQD%04x",cdev->private->schid.sch_no);
      QDIO_DBF_TEXT3(0,trace,dbf_text);
#endif /* CONFIG_QDIO_DEBUG */

      if ( (qidx>QDIO_MAX_BUFFERS_PER_Q) ||
           (count>QDIO_MAX_BUFFERS_PER_Q) ||
           (queue_number>QDIO_MAX_QUEUES_PER_IRQ) )
            return -EINVAL;

      if (count==0)
            return 0;

      irq_ptr = cdev->private->qdio_data;
      if (!irq_ptr)
            return -ENODEV;

#ifdef CONFIG_QDIO_DEBUG
      if (callflags&QDIO_FLAG_SYNC_INPUT)
            QDIO_DBF_HEX3(0,trace,&irq_ptr->input_qs[queue_number],
                        sizeof(void*));
      else
            QDIO_DBF_HEX3(0,trace,&irq_ptr->output_qs[queue_number],
                        sizeof(void*));
      sprintf(dbf_text,"flag%04x",callflags);
      QDIO_DBF_TEXT3(0,trace,dbf_text);
      sprintf(dbf_text,"qi%02xct%02x",qidx,count);
      QDIO_DBF_TEXT3(0,trace,dbf_text);
#endif /* CONFIG_QDIO_DEBUG */

      if (irq_ptr->state!=QDIO_IRQ_STATE_ACTIVE)
            return -EBUSY;

      if (callflags&QDIO_FLAG_SYNC_INPUT)
            do_qdio_handle_inbound(irq_ptr->input_qs[queue_number],
                               callflags, qidx, count, buffers);
      else if (callflags&QDIO_FLAG_SYNC_OUTPUT)
            do_qdio_handle_outbound(irq_ptr->output_qs[queue_number],
                              callflags, qidx, count, buffers);
      else {
            QDIO_DBF_TEXT3(1,trace,"doQD:inv");
            return -EINVAL;
      }
      return 0;
}

static int
qdio_perf_procfile_read(char *buffer, char **buffer_location, off_t offset,
                  int buffer_length, int *eof, void *data)
{
        int c=0;

        /* we are always called with buffer_length=4k, so we all
           deliver on the first read */
        if (offset>0)
            return 0;

#define _OUTP_IT(x...) c+=sprintf(buffer+c,x)
#ifdef CONFIG_64BIT
      _OUTP_IT("Number of tasklet runs (total)                  : %li\n",
             (long)atomic64_read(&perf_stats.tl_runs));
      _OUTP_IT("Inbound tasklet runs      tried/retried         : %li/%li\n",
             (long)atomic64_read(&perf_stats.inbound_tl_runs),
             (long)atomic64_read(&perf_stats.inbound_tl_runs_resched));
      _OUTP_IT("Inbound-thin tasklet runs tried/retried         : %li/%li\n",
             (long)atomic64_read(&perf_stats.inbound_thin_tl_runs),
             (long)atomic64_read(&perf_stats.inbound_thin_tl_runs_resched));
      _OUTP_IT("Outbound tasklet runs     tried/retried         : %li/%li\n",
             (long)atomic64_read(&perf_stats.outbound_tl_runs),
             (long)atomic64_read(&perf_stats.outbound_tl_runs_resched));
      _OUTP_IT("\n");
      _OUTP_IT("Number of SIGA sync's issued                    : %li\n",
             (long)atomic64_read(&perf_stats.siga_syncs));
      _OUTP_IT("Number of SIGA in's issued                      : %li\n",
             (long)atomic64_read(&perf_stats.siga_ins));
      _OUTP_IT("Number of SIGA out's issued                     : %li\n",
             (long)atomic64_read(&perf_stats.siga_outs));
      _OUTP_IT("Number of PCIs caught                           : %li\n",
             (long)atomic64_read(&perf_stats.pcis));
      _OUTP_IT("Number of adapter interrupts caught             : %li\n",
             (long)atomic64_read(&perf_stats.thinints));
      _OUTP_IT("Number of fast requeues (outg. SBALs w/o SIGA)  : %li\n",
             (long)atomic64_read(&perf_stats.fast_reqs));
      _OUTP_IT("\n");
      _OUTP_IT("Number of inbound transfers                     : %li\n",
             (long)atomic64_read(&perf_stats.inbound_cnt));
      _OUTP_IT("Number of do_QDIOs outbound                     : %li\n",
             (long)atomic64_read(&perf_stats.outbound_cnt));
#else /* CONFIG_64BIT */
      _OUTP_IT("Number of tasklet runs (total)                  : %i\n",
             atomic_read(&perf_stats.tl_runs));
      _OUTP_IT("Inbound tasklet runs      tried/retried         : %i/%i\n",
             atomic_read(&perf_stats.inbound_tl_runs),
             atomic_read(&perf_stats.inbound_tl_runs_resched));
      _OUTP_IT("Inbound-thin tasklet runs tried/retried         : %i/%i\n",
             atomic_read(&perf_stats.inbound_thin_tl_runs),
             atomic_read(&perf_stats.inbound_thin_tl_runs_resched));
      _OUTP_IT("Outbound tasklet runs     tried/retried         : %i/%i\n",
             atomic_read(&perf_stats.outbound_tl_runs),
             atomic_read(&perf_stats.outbound_tl_runs_resched));
      _OUTP_IT("\n");
      _OUTP_IT("Number of SIGA sync's issued                    : %i\n",
             atomic_read(&perf_stats.siga_syncs));
      _OUTP_IT("Number of SIGA in's issued                      : %i\n",
             atomic_read(&perf_stats.siga_ins));
      _OUTP_IT("Number of SIGA out's issued                     : %i\n",
             atomic_read(&perf_stats.siga_outs));
      _OUTP_IT("Number of PCIs caught                           : %i\n",
             atomic_read(&perf_stats.pcis));
      _OUTP_IT("Number of adapter interrupts caught             : %i\n",
             atomic_read(&perf_stats.thinints));
      _OUTP_IT("Number of fast requeues (outg. SBALs w/o SIGA)  : %i\n",
             atomic_read(&perf_stats.fast_reqs));
      _OUTP_IT("\n");
      _OUTP_IT("Number of inbound transfers                     : %i\n",
             atomic_read(&perf_stats.inbound_cnt));
      _OUTP_IT("Number of do_QDIOs outbound                     : %i\n",
             atomic_read(&perf_stats.outbound_cnt));
#endif /* CONFIG_64BIT */
      _OUTP_IT("\n");

        return c;
}

static struct proc_dir_entry *qdio_perf_proc_file;

static void
qdio_add_procfs_entry(void)
{
        proc_perf_file_registration=0;
      qdio_perf_proc_file=create_proc_entry(QDIO_PERF,
                                    S_IFREG|0444,&proc_root);
      if (qdio_perf_proc_file) {
            qdio_perf_proc_file->read_proc=&qdio_perf_procfile_read;
      } else proc_perf_file_registration=-1;

        if (proc_perf_file_registration)
                QDIO_PRINT_WARN("was not able to register perf. " \
                        "proc-file (%i).\n",
                        proc_perf_file_registration);
}

static void
qdio_remove_procfs_entry(void)
{
        if (!proc_perf_file_registration) /* means if it went ok earlier */
            remove_proc_entry(QDIO_PERF,&proc_root);
}

/**
 * attributes in sysfs
 *****************************************************************************/

static ssize_t
qdio_performance_stats_show(struct bus_type *bus, char *buf)
{
      return sprintf(buf, "%i\n", qdio_performance_stats ? 1 : 0);
}

static ssize_t
qdio_performance_stats_store(struct bus_type *bus, const char *buf, size_t count)
{
      char *tmp;
      int i;

      i = simple_strtoul(buf, &tmp, 16);
      if ((i == 0) || (i == 1)) {
            if (i == qdio_performance_stats)
                  return count;
            qdio_performance_stats = i;
            if (i==0) {
                  /* reset perf. stat. info */
#ifdef CONFIG_64BIT
                  atomic64_set(&perf_stats.tl_runs, 0);
                  atomic64_set(&perf_stats.outbound_tl_runs, 0);
                  atomic64_set(&perf_stats.inbound_tl_runs, 0);
                  atomic64_set(&perf_stats.inbound_tl_runs_resched, 0);
                  atomic64_set(&perf_stats.inbound_thin_tl_runs, 0);
                  atomic64_set(&perf_stats.inbound_thin_tl_runs_resched,
                             0);
                  atomic64_set(&perf_stats.siga_outs, 0);
                  atomic64_set(&perf_stats.siga_ins, 0);
                  atomic64_set(&perf_stats.siga_syncs, 0);
                  atomic64_set(&perf_stats.pcis, 0);
                  atomic64_set(&perf_stats.thinints, 0);
                  atomic64_set(&perf_stats.fast_reqs, 0);
                  atomic64_set(&perf_stats.outbound_cnt, 0);
                  atomic64_set(&perf_stats.inbound_cnt, 0);
#else /* CONFIG_64BIT */
                  atomic_set(&perf_stats.tl_runs, 0);
                  atomic_set(&perf_stats.outbound_tl_runs, 0);
                  atomic_set(&perf_stats.inbound_tl_runs, 0);
                  atomic_set(&perf_stats.inbound_tl_runs_resched, 0);
                  atomic_set(&perf_stats.inbound_thin_tl_runs, 0);
                  atomic_set(&perf_stats.inbound_thin_tl_runs_resched, 0);
                  atomic_set(&perf_stats.siga_outs, 0);
                  atomic_set(&perf_stats.siga_ins, 0);
                  atomic_set(&perf_stats.siga_syncs, 0);
                  atomic_set(&perf_stats.pcis, 0);
                  atomic_set(&perf_stats.thinints, 0);
                  atomic_set(&perf_stats.fast_reqs, 0);
                  atomic_set(&perf_stats.outbound_cnt, 0);
                  atomic_set(&perf_stats.inbound_cnt, 0);
#endif /* CONFIG_64BIT */
            }
      } else {
            QDIO_PRINT_ERR("QDIO performance_stats: write 0 or 1 to this file!\n");
            return -EINVAL;
      }
      return count;
}

static BUS_ATTR(qdio_performance_stats, 0644, qdio_performance_stats_show,
                  qdio_performance_stats_store);

static void
tiqdio_register_thinints(void)
{
      char dbf_text[20];
      register_thinint_result=
            s390_register_adapter_interrupt(&tiqdio_thinint_handler);
      if (register_thinint_result) {
            sprintf(dbf_text,"regthn%x",(register_thinint_result&0xff));
            QDIO_DBF_TEXT0(0,setup,dbf_text);
            QDIO_PRINT_ERR("failed to register adapter handler " \
                         "(rc=%i).\nAdapter interrupts might " \
                         "not work. Continuing.\n",
                         register_thinint_result);
      }
}

static void
tiqdio_unregister_thinints(void)
{
      if (!register_thinint_result)
            s390_unregister_adapter_interrupt(&tiqdio_thinint_handler);
}

static int
qdio_get_qdio_memory(void)
{
      int i;
      indicator_used[0]=1;

      for (i=1;i<INDICATORS_PER_CACHELINE;i++)
            indicator_used[i]=0;
      indicators = kzalloc(sizeof(__u32)*(INDICATORS_PER_CACHELINE),
                           GFP_KERNEL);
            if (!indicators)
            return -ENOMEM;
      return 0;
}

static void
qdio_release_qdio_memory(void)
{
      kfree(indicators);
}


static void
qdio_unregister_dbf_views(void)
{
      if (qdio_dbf_setup)
            debug_unregister(qdio_dbf_setup);
      if (qdio_dbf_sbal)
            debug_unregister(qdio_dbf_sbal);
      if (qdio_dbf_sense)
            debug_unregister(qdio_dbf_sense);
      if (qdio_dbf_trace)
            debug_unregister(qdio_dbf_trace);
#ifdef CONFIG_QDIO_DEBUG
        if (qdio_dbf_slsb_out)
                debug_unregister(qdio_dbf_slsb_out);
        if (qdio_dbf_slsb_in)
                debug_unregister(qdio_dbf_slsb_in);
#endif /* CONFIG_QDIO_DEBUG */
}

static int
qdio_register_dbf_views(void)
{
      qdio_dbf_setup=debug_register(QDIO_DBF_SETUP_NAME,
                              QDIO_DBF_SETUP_PAGES,
                              QDIO_DBF_SETUP_NR_AREAS,
                              QDIO_DBF_SETUP_LEN);
      if (!qdio_dbf_setup)
            goto oom;
      debug_register_view(qdio_dbf_setup,&debug_hex_ascii_view);
      debug_set_level(qdio_dbf_setup,QDIO_DBF_SETUP_LEVEL);

      qdio_dbf_sbal=debug_register(QDIO_DBF_SBAL_NAME,
                             QDIO_DBF_SBAL_PAGES,
                             QDIO_DBF_SBAL_NR_AREAS,
                             QDIO_DBF_SBAL_LEN);
      if (!qdio_dbf_sbal)
            goto oom;

      debug_register_view(qdio_dbf_sbal,&debug_hex_ascii_view);
      debug_set_level(qdio_dbf_sbal,QDIO_DBF_SBAL_LEVEL);

      qdio_dbf_sense=debug_register(QDIO_DBF_SENSE_NAME,
                              QDIO_DBF_SENSE_PAGES,
                              QDIO_DBF_SENSE_NR_AREAS,
                              QDIO_DBF_SENSE_LEN);
      if (!qdio_dbf_sense)
            goto oom;

      debug_register_view(qdio_dbf_sense,&debug_hex_ascii_view);
      debug_set_level(qdio_dbf_sense,QDIO_DBF_SENSE_LEVEL);

      qdio_dbf_trace=debug_register(QDIO_DBF_TRACE_NAME,
                              QDIO_DBF_TRACE_PAGES,
                              QDIO_DBF_TRACE_NR_AREAS,
                              QDIO_DBF_TRACE_LEN);
      if (!qdio_dbf_trace)
            goto oom;

      debug_register_view(qdio_dbf_trace,&debug_hex_ascii_view);
      debug_set_level(qdio_dbf_trace,QDIO_DBF_TRACE_LEVEL);

#ifdef CONFIG_QDIO_DEBUG
        qdio_dbf_slsb_out=debug_register(QDIO_DBF_SLSB_OUT_NAME,
                                         QDIO_DBF_SLSB_OUT_PAGES,
                                         QDIO_DBF_SLSB_OUT_NR_AREAS,
                                         QDIO_DBF_SLSB_OUT_LEN);
        if (!qdio_dbf_slsb_out)
            goto oom;
        debug_register_view(qdio_dbf_slsb_out,&debug_hex_ascii_view);
        debug_set_level(qdio_dbf_slsb_out,QDIO_DBF_SLSB_OUT_LEVEL);

        qdio_dbf_slsb_in=debug_register(QDIO_DBF_SLSB_IN_NAME,
                                        QDIO_DBF_SLSB_IN_PAGES,
                                        QDIO_DBF_SLSB_IN_NR_AREAS,
                                        QDIO_DBF_SLSB_IN_LEN);
        if (!qdio_dbf_slsb_in)
            goto oom;
        debug_register_view(qdio_dbf_slsb_in,&debug_hex_ascii_view);
        debug_set_level(qdio_dbf_slsb_in,QDIO_DBF_SLSB_IN_LEVEL);
#endif /* CONFIG_QDIO_DEBUG */
      return 0;
oom:
      QDIO_PRINT_ERR("not enough memory for dbf.\n");
      qdio_unregister_dbf_views();
      return -ENOMEM;
}

static void *qdio_mempool_alloc(gfp_t gfp_mask, void *size)
{
      return (void *) get_zeroed_page(gfp_mask|GFP_DMA);
}

static void qdio_mempool_free(void *element, void *size)
{
      free_page((unsigned long) element);
}

static int __init
init_QDIO(void)
{
      int res;
      void *ptr;

      printk("qdio: loading %s\n",version);

      res=qdio_get_qdio_memory();
      if (res)
            return res;

      qdio_q_cache = kmem_cache_create("qdio_q", sizeof(struct qdio_q),
                               256, 0, NULL);
      if (!qdio_q_cache) {
            qdio_release_qdio_memory();
            return -ENOMEM;
      }

      res = qdio_register_dbf_views();
      if (res) {
            kmem_cache_destroy(qdio_q_cache);
            qdio_release_qdio_memory();
            return res;
      }

      QDIO_DBF_TEXT0(0,setup,"initQDIO");
      res = bus_create_file(&ccw_bus_type, &bus_attr_qdio_performance_stats);

      memset((void*)&perf_stats,0,sizeof(perf_stats));
      QDIO_DBF_TEXT0(0,setup,"perfstat");
      ptr=&perf_stats;
      QDIO_DBF_HEX0(0,setup,&ptr,sizeof(void*));

      qdio_add_procfs_entry();

      qdio_mempool_scssc = mempool_create(QDIO_MEMPOOL_SCSSC_ELEMENTS,
                                  qdio_mempool_alloc,
                                  qdio_mempool_free, NULL);

      if (tiqdio_check_chsc_availability())
            QDIO_PRINT_ERR("Not all CHSCs supported. Continuing.\n");

      tiqdio_register_thinints();

      return 0;
 }

static void __exit
cleanup_QDIO(void)
{
      tiqdio_unregister_thinints();
      qdio_remove_procfs_entry();
      qdio_release_qdio_memory();
      qdio_unregister_dbf_views();
      mempool_destroy(qdio_mempool_scssc);
      kmem_cache_destroy(qdio_q_cache);
      bus_remove_file(&ccw_bus_type, &bus_attr_qdio_performance_stats);
      printk("qdio: %s: module removed\n",version);
}

module_init(init_QDIO);
module_exit(cleanup_QDIO);

EXPORT_SYMBOL(qdio_allocate);
EXPORT_SYMBOL(qdio_establish);
EXPORT_SYMBOL(qdio_initialize);
EXPORT_SYMBOL(qdio_activate);
EXPORT_SYMBOL(do_QDIO);
EXPORT_SYMBOL(qdio_shutdown);
EXPORT_SYMBOL(qdio_free);
EXPORT_SYMBOL(qdio_cleanup);
EXPORT_SYMBOL(qdio_synchronize);

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